\nCanonicalHeaders =\n CanonicalHeadersEntry0 + CanonicalHeadersEntry1 + ... + CanonicalHeadersEntryN\nCanonicalHeadersEntry =\n Lowercase(HeaderName) + ':' + Trimall(HeaderValue) + '\\n'\n\n*/\nvar canonical_headers = function (headers) {\n if (!headers || Object.keys(headers).length === 0) {\n return '';\n }\n return (Object.keys(headers)\n .map(function (key) {\n return {\n key: key.toLowerCase(),\n value: headers[key] ? headers[key].trim().replace(/\\s+/g, ' ') : '',\n };\n })\n .sort(function (a, b) {\n return a.key < b.key ? -1 : 1;\n })\n .map(function (item) {\n return item.key + ':' + item.value;\n })\n .join('\\n') + '\\n');\n};\n/**\n * List of header keys included in the canonical headers.\n * @access private\n */\nvar signed_headers = function (headers) {\n return Object.keys(headers)\n .map(function (key) {\n return key.toLowerCase();\n })\n .sort()\n .join(';');\n};\n/**\n* @private\n* Create canonical request\n* Refer to\n* {@link http://docs.aws.amazon.com/general/latest/gr/sigv4-create-canonical-request.html|Create a Canonical Request}\n*\n
\nCanonicalRequest =\n HTTPRequestMethod + '\\n' +\n CanonicalURI + '\\n' +\n CanonicalQueryString + '\\n' +\n CanonicalHeaders + '\\n' +\n SignedHeaders + '\\n' +\n HexEncode(Hash(RequestPayload))\n\n*/\nvar canonical_request = function (request) {\n var url_info = url.parse(request.url);\n return [\n request.method || '/',\n encodeURIComponent(url_info.pathname).replace(/%2F/gi, '/'),\n canonical_query(url_info.query),\n canonical_headers(request.headers),\n signed_headers(request.headers),\n hash(request.data),\n ].join('\\n');\n};\nvar parse_service_info = function (request) {\n var url_info = url.parse(request.url), host = url_info.host;\n var matched = host.match(/([^\\.]+)\\.(?:([^\\.]*)\\.)?amazonaws\\.com$/);\n var parsed = (matched || []).slice(1, 3);\n if (parsed[1] === 'es') {\n // Elastic Search\n parsed = parsed.reverse();\n }\n return {\n service: request.service || parsed[0],\n region: request.region || parsed[1],\n };\n};\nvar credential_scope = function (d_str, region, service) {\n return [d_str, region, service, 'aws4_request'].join('/');\n};\n/**\n* @private\n* Create a string to sign\n* Refer to\n* {@link http://docs.aws.amazon.com/general/latest/gr/sigv4-create-string-to-sign.html|Create String to Sign}\n*\n
\nStringToSign =\n Algorithm + \\n +\n RequestDateTime + \\n +\n CredentialScope + \\n +\n HashedCanonicalRequest\n\n*/\nvar string_to_sign = function (algorithm, canonical_request, dt_str, scope) {\n return [algorithm, dt_str, scope, hash(canonical_request)].join('\\n');\n};\n/**\n* @private\n* Create signing key\n* Refer to\n* {@link http://docs.aws.amazon.com/general/latest/gr/sigv4-calculate-signature.html|Calculate Signature}\n*\n
\nkSecret = your secret access key\nkDate = HMAC(\"AWS4\" + kSecret, Date)\nkRegion = HMAC(kDate, Region)\nkService = HMAC(kRegion, Service)\nkSigning = HMAC(kService, \"aws4_request\")\n\n*/\nvar get_signing_key = function (secret_key, d_str, service_info) {\n logger.debug(service_info);\n var k = 'AWS4' + secret_key, k_date = encrypt(k, d_str), k_region = encrypt(k_date, service_info.region), k_service = encrypt(k_region, service_info.service), k_signing = encrypt(k_service, 'aws4_request');\n return k_signing;\n};\nvar get_signature = function (signing_key, str_to_sign) {\n return encrypt(signing_key, str_to_sign, 'hex');\n};\n/**\n * @private\n * Create authorization header\n * Refer to\n * {@link http://docs.aws.amazon.com/general/latest/gr/sigv4-add-signature-to-request.html|Add the Signing Information}\n */\nvar get_authorization_header = function (algorithm, access_key, scope, signed_headers, signature) {\n return [\n algorithm + ' ' + 'Credential=' + access_key + '/' + scope,\n 'SignedHeaders=' + signed_headers,\n 'Signature=' + signature,\n ].join(', ');\n};\n/**\n * AWS request signer.\n * Refer to {@link http://docs.aws.amazon.com/general/latest/gr/sigv4_signing.html|Signature Version 4}\n *\n * @class Signer\n */\nvar Signer = /** @class */ (function () {\n function Signer() {\n }\n /**\n * Sign a HTTP request, add 'Authorization' header to request param\n * @method sign\n * @memberof Signer\n * @static\n *\n * @param {object} request - HTTP request object\n
\n request: {\n method: GET | POST | PUT ...\n url: ...,\n headers: {\n header1: ...\n },\n data: data\n }\n \n * @param {object} access_info - AWS access credential info\n \n access_info: {\n access_key: ...,\n secret_key: ...,\n session_token: ...\n }\n \n * @param {object} [service_info] - AWS service type and region, optional,\n * if not provided then parse out from url\n \n service_info: {\n service: ...,\n region: ...\n }\n \n *\n * @returns {object} Signed HTTP request\n */\n Signer.sign = function (request, access_info, service_info) {\n if (service_info === void 0) { service_info = null; }\n request.headers = request.headers || {};\n // datetime string and date string\n var dt = new Date(), dt_str = dt.toISOString().replace(/[:\\-]|\\.\\d{3}/g, ''), d_str = dt_str.substr(0, 8);\n var url_info = url.parse(request.url);\n request.headers['host'] = url_info.host;\n request.headers['x-amz-date'] = dt_str;\n if (access_info.session_token) {\n request.headers['X-Amz-Security-Token'] = access_info.session_token;\n }\n // Task 1: Create a Canonical Request\n var request_str = canonical_request(request);\n logger.debug(request_str);\n // Task 2: Create a String to Sign\n var serviceInfo = service_info || parse_service_info(request), scope = credential_scope(d_str, serviceInfo.region, serviceInfo.service), str_to_sign = string_to_sign(DEFAULT_ALGORITHM, request_str, dt_str, scope);\n // Task 3: Calculate the Signature\n var signing_key = get_signing_key(access_info.secret_key, d_str, serviceInfo), signature = get_signature(signing_key, str_to_sign);\n // Task 4: Adding the Signing information to the Request\n var authorization_header = get_authorization_header(DEFAULT_ALGORITHM, access_info.access_key, scope, signed_headers(request.headers), signature);\n request.headers['Authorization'] = authorization_header;\n return request;\n };\n Signer.signUrl = function (urlOrRequest, accessInfo, serviceInfo, expiration) {\n var urlToSign = typeof urlOrRequest === 'object' ? urlOrRequest.url : urlOrRequest;\n var method = typeof urlOrRequest === 'object' ? urlOrRequest.method : 'GET';\n var body = typeof urlOrRequest === 'object' ? urlOrRequest.body : undefined;\n var now = new Date().toISOString().replace(/[:\\-]|\\.\\d{3}/g, '');\n var today = now.substr(0, 8);\n // Intentionally discarding search\n var _a = url.parse(urlToSign, true, true), search = _a.search, parsedUrl = __rest(_a, [\"search\"]);\n var host = parsedUrl.host;\n var signedHeaders = { host: host };\n var _b = serviceInfo || parse_service_info({ url: url.format(parsedUrl) }), region = _b.region, service = _b.service;\n var credentialScope = credential_scope(today, region, service);\n // IoT service does not allow the session token in the canonical request\n // https://docs.aws.amazon.com/general/latest/gr/sigv4-add-signature-to-request.html\n var sessionTokenRequired = accessInfo.session_token && service !== IOT_SERVICE_NAME;\n var queryParams = __assign(__assign(__assign({ 'X-Amz-Algorithm': DEFAULT_ALGORITHM, 'X-Amz-Credential': [accessInfo.access_key, credentialScope].join('/'), 'X-Amz-Date': now.substr(0, 16) }, (sessionTokenRequired\n ? { 'X-Amz-Security-Token': \"\" + accessInfo.session_token }\n : {})), (expiration ? { 'X-Amz-Expires': \"\" + expiration } : {})), { 'X-Amz-SignedHeaders': Object.keys(signedHeaders).join(',') });\n var canonicalRequest = canonical_request({\n method: method,\n url: url.format(__assign(__assign({}, parsedUrl), { query: __assign(__assign({}, parsedUrl.query), queryParams) })),\n headers: signedHeaders,\n data: body,\n });\n var stringToSign = string_to_sign(DEFAULT_ALGORITHM, canonicalRequest, now, credentialScope);\n var signing_key = get_signing_key(accessInfo.secret_key, today, {\n region: region,\n service: service,\n });\n var signature = get_signature(signing_key, stringToSign);\n var additionalQueryParams = __assign({ 'X-Amz-Signature': signature }, (accessInfo.session_token && {\n 'X-Amz-Security-Token': accessInfo.session_token,\n }));\n var result = url.format({\n protocol: parsedUrl.protocol,\n slashes: true,\n hostname: parsedUrl.hostname,\n port: parsedUrl.port,\n pathname: parsedUrl.pathname,\n query: __assign(__assign(__assign({}, parsedUrl.query), queryParams), additionalQueryParams),\n });\n return result;\n };\n return Signer;\n}());\nexport default Signer;\n//# sourceMappingURL=Signer.js.map","import { ConsoleLogger as Logger } from './Logger';\nvar logger = new Logger('Parser');\nvar Parser = /** @class */ (function () {\n function Parser() {\n }\n Parser.parseMobilehubConfig = function (config) {\n var amplifyConfig = {};\n // Analytics\n if (config['aws_mobile_analytics_app_id']) {\n var Analytics = {\n AWSPinpoint: {\n appId: config['aws_mobile_analytics_app_id'],\n region: config['aws_mobile_analytics_app_region'],\n },\n };\n amplifyConfig.Analytics = Analytics;\n }\n // Auth\n if (config['aws_cognito_identity_pool_id'] || config['aws_user_pools_id']) {\n var Auth = {\n userPoolId: config['aws_user_pools_id'],\n userPoolWebClientId: config['aws_user_pools_web_client_id'],\n region: config['aws_cognito_region'],\n identityPoolId: config['aws_cognito_identity_pool_id'],\n mandatorySignIn: config['aws_mandatory_sign_in'] === 'enable' ? true : false,\n };\n amplifyConfig.Auth = Auth;\n }\n // Storage\n var storageConfig;\n if (config['aws_user_files_s3_bucket']) {\n storageConfig = {\n AWSS3: {\n bucket: config['aws_user_files_s3_bucket'],\n region: config['aws_user_files_s3_bucket_region'],\n dangerouslyConnectToHttpEndpointForTesting: config['aws_user_files_s3_dangerously_connect_to_http_endpoint_for_testing'],\n },\n };\n }\n else {\n storageConfig = config ? config.Storage || config : {};\n }\n amplifyConfig.Analytics = Object.assign({}, amplifyConfig.Analytics, config.Analytics);\n amplifyConfig.Auth = Object.assign({}, amplifyConfig.Auth, config.Auth);\n amplifyConfig.Storage = Object.assign({}, storageConfig);\n logger.debug('parse config', config, 'to amplifyconfig', amplifyConfig);\n return amplifyConfig;\n };\n return Parser;\n}());\nexport default Parser;\n//# sourceMappingURL=Parser.js.map","var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, generator) {\n function adopt(value) { return value instanceof P ? value : new P(function (resolve) { resolve(value); }); }\n return new (P || (P = Promise))(function (resolve, reject) {\n function fulfilled(value) { try { step(generator.next(value)); } catch (e) { reject(e); } }\n function rejected(value) { try { step(generator[\"throw\"](value)); } catch (e) { reject(e); } }\n function step(result) { result.done ? resolve(result.value) : adopt(result.value).then(fulfilled, rejected); }\n step((generator = generator.apply(thisArg, _arguments || [])).next());\n });\n};\nvar __generator = (this && this.__generator) || function (thisArg, body) {\n var _ = { label: 0, sent: function() { if (t[0] & 1) throw t[1]; return t[1]; }, trys: [], ops: [] }, f, y, t, g;\n return g = { next: verb(0), \"throw\": verb(1), \"return\": verb(2) }, typeof Symbol === \"function\" && (g[Symbol.iterator] = function() { return this; }), g;\n function verb(n) { return function (v) { return step([n, v]); }; }\n function step(op) {\n if (f) throw new TypeError(\"Generator is already executing.\");\n while (_) try {\n if (f = 1, y && (t = op[0] & 2 ? y[\"return\"] : op[0] ? y[\"throw\"] || ((t = y[\"return\"]) && t.call(y), 0) : y.next) && !(t = t.call(y, op[1])).done) return t;\n if (y = 0, t) op = [op[0] & 2, t.value];\n switch (op[0]) {\n case 0: case 1: t = op; break;\n case 4: _.label++; return { value: op[1], done: false };\n case 5: _.label++; y = op[1]; op = [0]; continue;\n case 7: op = _.ops.pop(); _.trys.pop(); continue;\n default:\n if (!(t = _.trys, t = t.length > 0 && t[t.length - 1]) && (op[0] === 6 || op[0] === 2)) { _ = 0; continue; }\n if (op[0] === 3 && (!t || (op[1] > t[0] && op[1] < t[3]))) { _.label = op[1]; break; }\n if (op[0] === 6 && _.label < t[1]) { _.label = t[1]; t = op; break; }\n if (t && _.label < t[2]) { _.label = t[2]; _.ops.push(op); break; }\n if (t[2]) _.ops.pop();\n _.trys.pop(); continue;\n }\n op = body.call(thisArg, _);\n } catch (e) { op = [6, e]; y = 0; } finally { f = t = 0; }\n if (op[0] & 5) throw op[1]; return { value: op[0] ? op[1] : void 0, done: true };\n }\n};\n/*\n * Copyright 2017-2017 Amazon.com, Inc. or its affiliates. All Rights Reserved.\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\"). You may not use this file except in compliance with\n * the License. A copy of the License is located at\n *\n * http://aws.amazon.com/apache2.0/\n *\n * or in the \"license\" file accompanying this file. This file is distributed on an \"AS IS\" BASIS, WITHOUT WARRANTIES OR\n * CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions\n * and limitations under the License.\n */\nimport { ConsoleLogger as Logger } from '../Logger';\nimport JS from '../JS';\nvar logger = new Logger('CognitoCredentials');\nvar waitForInit = new Promise(function (res, rej) {\n if (!JS.browserOrNode().isBrowser) {\n logger.debug('not in the browser, directly resolved');\n return res();\n }\n var ga = window['gapi'] && window['gapi'].auth2 ? window['gapi'].auth2 : null;\n if (ga) {\n logger.debug('google api already loaded');\n return res();\n }\n else {\n setTimeout(function () {\n return res();\n }, 2000);\n }\n});\nvar GoogleOAuth = /** @class */ (function () {\n function GoogleOAuth() {\n this.initialized = false;\n this.refreshGoogleToken = this.refreshGoogleToken.bind(this);\n this._refreshGoogleTokenImpl = this._refreshGoogleTokenImpl.bind(this);\n }\n GoogleOAuth.prototype.refreshGoogleToken = function () {\n return __awaiter(this, void 0, void 0, function () {\n return __generator(this, function (_a) {\n switch (_a.label) {\n case 0:\n if (!!this.initialized) return [3 /*break*/, 2];\n logger.debug('need to wait for the Google SDK loaded');\n return [4 /*yield*/, waitForInit];\n case 1:\n _a.sent();\n this.initialized = true;\n logger.debug('finish waiting');\n _a.label = 2;\n case 2: return [2 /*return*/, this._refreshGoogleTokenImpl()];\n }\n });\n });\n };\n GoogleOAuth.prototype._refreshGoogleTokenImpl = function () {\n var ga = null;\n if (JS.browserOrNode().isBrowser)\n ga = window['gapi'] && window['gapi'].auth2 ? window['gapi'].auth2 : null;\n if (!ga) {\n logger.debug('no gapi auth2 available');\n return Promise.reject('no gapi auth2 available');\n }\n return new Promise(function (res, rej) {\n ga.getAuthInstance()\n .then(function (googleAuth) {\n if (!googleAuth) {\n console.log('google Auth undefiend');\n rej('google Auth undefiend');\n }\n var googleUser = googleAuth.currentUser.get();\n // refresh the token\n if (googleUser.isSignedIn()) {\n logger.debug('refreshing the google access token');\n googleUser.reloadAuthResponse().then(function (authResponse) {\n var id_token = authResponse.id_token, expires_at = authResponse.expires_at;\n var profile = googleUser.getBasicProfile();\n var user = {\n email: profile.getEmail(),\n name: profile.getName(),\n };\n res({ token: id_token, expires_at: expires_at });\n });\n }\n else {\n rej('User is not signed in with Google');\n }\n })\n .catch(function (err) {\n logger.debug('Failed to refresh google token', err);\n rej('Failed to refresh google token');\n });\n });\n };\n return GoogleOAuth;\n}());\nexport default GoogleOAuth;\n//# sourceMappingURL=GoogleOAuth.js.map","var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, generator) {\n function adopt(value) { return value instanceof P ? value : new P(function (resolve) { resolve(value); }); }\n return new (P || (P = Promise))(function (resolve, reject) {\n function fulfilled(value) { try { step(generator.next(value)); } catch (e) { reject(e); } }\n function rejected(value) { try { step(generator[\"throw\"](value)); } catch (e) { reject(e); } }\n function step(result) { result.done ? resolve(result.value) : adopt(result.value).then(fulfilled, rejected); }\n step((generator = generator.apply(thisArg, _arguments || [])).next());\n });\n};\nvar __generator = (this && this.__generator) || function (thisArg, body) {\n var _ = { label: 0, sent: function() { if (t[0] & 1) throw t[1]; return t[1]; }, trys: [], ops: [] }, f, y, t, g;\n return g = { next: verb(0), \"throw\": verb(1), \"return\": verb(2) }, typeof Symbol === \"function\" && (g[Symbol.iterator] = function() { return this; }), g;\n function verb(n) { return function (v) { return step([n, v]); }; }\n function step(op) {\n if (f) throw new TypeError(\"Generator is already executing.\");\n while (_) try {\n if (f = 1, y && (t = op[0] & 2 ? y[\"return\"] : op[0] ? y[\"throw\"] || ((t = y[\"return\"]) && t.call(y), 0) : y.next) && !(t = t.call(y, op[1])).done) return t;\n if (y = 0, t) op = [op[0] & 2, t.value];\n switch (op[0]) {\n case 0: case 1: t = op; break;\n case 4: _.label++; return { value: op[1], done: false };\n case 5: _.label++; y = op[1]; op = [0]; continue;\n case 7: op = _.ops.pop(); _.trys.pop(); continue;\n default:\n if (!(t = _.trys, t = t.length > 0 && t[t.length - 1]) && (op[0] === 6 || op[0] === 2)) { _ = 0; continue; }\n if (op[0] === 3 && (!t || (op[1] > t[0] && op[1] < t[3]))) { _.label = op[1]; break; }\n if (op[0] === 6 && _.label < t[1]) { _.label = t[1]; t = op; break; }\n if (t && _.label < t[2]) { _.label = t[2]; _.ops.push(op); break; }\n if (t[2]) _.ops.pop();\n _.trys.pop(); continue;\n }\n op = body.call(thisArg, _);\n } catch (e) { op = [6, e]; y = 0; } finally { f = t = 0; }\n if (op[0] & 5) throw op[1]; return { value: op[0] ? op[1] : void 0, done: true };\n }\n};\n/*\n * Copyright 2017-2017 Amazon.com, Inc. or its affiliates. All Rights Reserved.\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\"). You may not use this file except in compliance with\n * the License. A copy of the License is located at\n *\n * http://aws.amazon.com/apache2.0/\n *\n * or in the \"license\" file accompanying this file. This file is distributed on an \"AS IS\" BASIS, WITHOUT WARRANTIES OR\n * CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions\n * and limitations under the License.\n */\nimport { ConsoleLogger as Logger } from '../Logger';\nimport JS from '../JS';\nvar logger = new Logger('CognitoCredentials');\nvar waitForInit = new Promise(function (res, rej) {\n if (!JS.browserOrNode().isBrowser) {\n logger.debug('not in the browser, directly resolved');\n return res();\n }\n var fb = window['FB'];\n if (fb) {\n logger.debug('FB SDK already loaded');\n return res();\n }\n else {\n setTimeout(function () {\n return res();\n }, 2000);\n }\n});\nvar FacebookOAuth = /** @class */ (function () {\n function FacebookOAuth() {\n this.initialized = false;\n this.refreshFacebookToken = this.refreshFacebookToken.bind(this);\n this._refreshFacebookTokenImpl = this._refreshFacebookTokenImpl.bind(this);\n }\n FacebookOAuth.prototype.refreshFacebookToken = function () {\n return __awaiter(this, void 0, void 0, function () {\n return __generator(this, function (_a) {\n switch (_a.label) {\n case 0:\n if (!!this.initialized) return [3 /*break*/, 2];\n logger.debug('need to wait for the Facebook SDK loaded');\n return [4 /*yield*/, waitForInit];\n case 1:\n _a.sent();\n this.initialized = true;\n logger.debug('finish waiting');\n _a.label = 2;\n case 2: return [2 /*return*/, this._refreshFacebookTokenImpl()];\n }\n });\n });\n };\n FacebookOAuth.prototype._refreshFacebookTokenImpl = function () {\n var fb = null;\n if (JS.browserOrNode().isBrowser)\n fb = window['FB'];\n if (!fb) {\n logger.debug('no fb sdk available');\n return Promise.reject('no fb sdk available');\n }\n return new Promise(function (res, rej) {\n fb.getLoginStatus(function (fbResponse) {\n if (!fbResponse || !fbResponse.authResponse) {\n logger.debug('no response from facebook when refreshing the jwt token');\n rej('no response from facebook when refreshing the jwt token');\n }\n var response = fbResponse.authResponse;\n var accessToken = response.accessToken, expiresIn = response.expiresIn;\n var date = new Date();\n var expires_at = expiresIn * 1000 + date.getTime();\n if (!accessToken) {\n logger.debug('the jwtToken is undefined');\n rej('the jwtToken is undefined');\n }\n res({ token: accessToken, expires_at: expires_at });\n }, { scope: 'public_profile,email' });\n });\n };\n return FacebookOAuth;\n}());\nexport default FacebookOAuth;\n//# sourceMappingURL=FacebookOAuth.js.map","/*\n * Copyright 2017-2017 Amazon.com, Inc. or its affiliates. All Rights Reserved.\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\"). You may not use this file except in compliance with\n * the License. A copy of the License is located at\n *\n * http://aws.amazon.com/apache2.0/\n *\n * or in the \"license\" file accompanying this file. This file is distributed on an \"AS IS\" BASIS, WITHOUT WARRANTIES OR\n * CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions\n * and limitations under the License.\n */\nimport GoogleOAuthClass from './GoogleOAuth';\nimport FacebookOAuthClass from './FacebookOAuth';\nvar GoogleOAuth = new GoogleOAuthClass();\nvar FacebookOAuth = new FacebookOAuthClass();\nexport { GoogleOAuth, FacebookOAuth };\n//# sourceMappingURL=index.js.map","/*\n * Copyright 2017-2017 Amazon.com, Inc. or its affiliates. All Rights Reserved.\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\"). You may not use this file except in compliance with\n * the License. A copy of the License is located at\n *\n * http://aws.amazon.com/apache2.0/\n *\n * or in the \"license\" file accompanying this file. This file is distributed on an \"AS IS\" BASIS, WITHOUT WARRANTIES OR\n * CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions\n * and limitations under the License.\n */\nvar dataMemory = {};\n/** @class */\nvar MemoryStorage = /** @class */ (function () {\n function MemoryStorage() {\n }\n /**\n * This is used to set a specific item in storage\n * @param {string} key - the key for the item\n * @param {object} value - the value\n * @returns {string} value that was set\n */\n MemoryStorage.setItem = function (key, value) {\n dataMemory[key] = value;\n return dataMemory[key];\n };\n /**\n * This is used to get a specific key from storage\n * @param {string} key - the key for the item\n * This is used to clear the storage\n * @returns {string} the data item\n */\n MemoryStorage.getItem = function (key) {\n return Object.prototype.hasOwnProperty.call(dataMemory, key)\n ? dataMemory[key]\n : undefined;\n };\n /**\n * This is used to remove an item from storage\n * @param {string} key - the key being set\n * @returns {string} value - value that was deleted\n */\n MemoryStorage.removeItem = function (key) {\n return delete dataMemory[key];\n };\n /**\n * This is used to clear the storage\n * @returns {string} nothing\n */\n MemoryStorage.clear = function () {\n dataMemory = {};\n return dataMemory;\n };\n return MemoryStorage;\n}());\nexport { MemoryStorage };\nvar StorageHelper = /** @class */ (function () {\n /**\n * This is used to get a storage object\n * @returns {object} the storage\n */\n function StorageHelper() {\n try {\n this.storageWindow = window.localStorage;\n this.storageWindow.setItem('aws.amplify.test-ls', 1);\n this.storageWindow.removeItem('aws.amplify.test-ls');\n }\n catch (exception) {\n this.storageWindow = MemoryStorage;\n }\n }\n /**\n * This is used to return the storage\n * @returns {object} the storage\n */\n StorageHelper.prototype.getStorage = function () {\n return this.storageWindow;\n };\n return StorageHelper;\n}());\nexport default StorageHelper;\n//# sourceMappingURL=index.js.map","/*\n * Copyright 2017-2017 Amazon.com, Inc. or its affiliates. All Rights Reserved.\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\"). You may not use this file except in compliance with\n * the License. A copy of the License is located at\n *\n * http://aws.amazon.com/apache2.0/\n *\n * or in the \"license\" file accompanying this file. This file is distributed on an \"AS IS\" BASIS, WITHOUT WARRANTIES OR\n * CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions\n * and limitations under the License.\n */\nimport JS from '../JS';\nimport MemoryStorage from '../StorageHelper';\nvar Linking = {};\nvar AppState = {\n addEventListener: function (action, handler) {\n return;\n },\n};\n// if not in react native, just use local storage\nvar AsyncStorage = JS.browserOrNode().isBrowser\n ? new MemoryStorage().getStorage()\n : undefined;\nexport { Linking, AppState, AsyncStorage };\n//# sourceMappingURL=index.js.map","var __assign = (this && this.__assign) || function () {\n __assign = Object.assign || function(t) {\n for (var s, i = 1, n = arguments.length; i < n; i++) {\n s = arguments[i];\n for (var p in s) if (Object.prototype.hasOwnProperty.call(s, p))\n t[p] = s[p];\n }\n return t;\n };\n return __assign.apply(this, arguments);\n};\nvar __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, generator) {\n function adopt(value) { return value instanceof P ? value : new P(function (resolve) { resolve(value); }); }\n return new (P || (P = Promise))(function (resolve, reject) {\n function fulfilled(value) { try { step(generator.next(value)); } catch (e) { reject(e); } }\n function rejected(value) { try { step(generator[\"throw\"](value)); } catch (e) { reject(e); } }\n function step(result) { result.done ? resolve(result.value) : adopt(result.value).then(fulfilled, rejected); }\n step((generator = generator.apply(thisArg, _arguments || [])).next());\n });\n};\nvar __generator = (this && this.__generator) || function (thisArg, body) {\n var _ = { label: 0, sent: function() { if (t[0] & 1) throw t[1]; return t[1]; }, trys: [], ops: [] }, f, y, t, g;\n return g = { next: verb(0), \"throw\": verb(1), \"return\": verb(2) }, typeof Symbol === \"function\" && (g[Symbol.iterator] = function() { return this; }), g;\n function verb(n) { return function (v) { return step([n, v]); }; }\n function step(op) {\n if (f) throw new TypeError(\"Generator is already executing.\");\n while (_) try {\n if (f = 1, y && (t = op[0] & 2 ? y[\"return\"] : op[0] ? y[\"throw\"] || ((t = y[\"return\"]) && t.call(y), 0) : y.next) && !(t = t.call(y, op[1])).done) return t;\n if (y = 0, t) op = [op[0] & 2, t.value];\n switch (op[0]) {\n case 0: case 1: t = op; break;\n case 4: _.label++; return { value: op[1], done: false };\n case 5: _.label++; y = op[1]; op = [0]; continue;\n case 7: op = _.ops.pop(); _.trys.pop(); continue;\n default:\n if (!(t = _.trys, t = t.length > 0 && t[t.length - 1]) && (op[0] === 6 || op[0] === 2)) { _ = 0; continue; }\n if (op[0] === 3 && (!t || (op[1] > t[0] && op[1] < t[3]))) { _.label = op[1]; break; }\n if (op[0] === 6 && _.label < t[1]) { _.label = t[1]; t = op; break; }\n if (t && _.label < t[2]) { _.label = t[2]; _.ops.push(op); break; }\n if (t[2]) _.ops.pop();\n _.trys.pop(); continue;\n }\n op = body.call(thisArg, _);\n } catch (e) { op = [6, e]; y = 0; } finally { f = t = 0; }\n if (op[0] & 5) throw op[1]; return { value: op[0] ? op[1] : void 0, done: true };\n }\n};\nimport { ConsoleLogger as Logger } from './Logger';\nimport StorageHelper from './StorageHelper';\nimport { AWS } from './Facet';\nimport JS from './JS';\nimport { FacebookOAuth, GoogleOAuth } from './OAuthHelper';\nimport Amplify from './Amplify';\nvar logger = new Logger('Credentials');\nvar Credentials = /** @class */ (function () {\n function Credentials(config) {\n this._gettingCredPromise = null;\n this._refreshHandlers = {};\n this.configure(config);\n this._refreshHandlers['google'] = GoogleOAuth.refreshGoogleToken;\n this._refreshHandlers['facebook'] = FacebookOAuth.refreshFacebookToken;\n }\n Credentials.prototype.getCredSource = function () {\n return this._credentials_source;\n };\n Credentials.prototype.configure = function (config) {\n if (!config)\n return this._config || {};\n this._config = Object.assign({}, this._config, config);\n var refreshHandlers = this._config.refreshHandlers;\n // If the developer has provided an object of refresh handlers,\n // then we can merge the provided handlers with the current handlers.\n if (refreshHandlers) {\n this._refreshHandlers = __assign(__assign({}, this._refreshHandlers), refreshHandlers);\n }\n this._storage = this._config.storage;\n if (!this._storage) {\n this._storage = new StorageHelper().getStorage();\n }\n this._storageSync = Promise.resolve();\n if (typeof this._storage['sync'] === 'function') {\n this._storageSync = this._storage['sync']();\n }\n return this._config;\n };\n Credentials.prototype.get = function () {\n logger.debug('getting credentials');\n return this._pickupCredentials();\n };\n Credentials.prototype._pickupCredentials = function () {\n logger.debug('picking up credentials');\n if (!this._gettingCredPromise || !this._gettingCredPromise.isPending()) {\n logger.debug('getting new cred promise');\n if (AWS.config &&\n AWS.config.credentials &&\n AWS.config.credentials instanceof AWS.Credentials) {\n this._gettingCredPromise = JS.makeQuerablePromise(this._setCredentialsFromAWS());\n }\n else {\n this._gettingCredPromise = JS.makeQuerablePromise(this._keepAlive());\n }\n }\n else {\n logger.debug('getting old cred promise');\n }\n return this._gettingCredPromise;\n };\n Credentials.prototype._keepAlive = function () {\n logger.debug('checking if credentials exists and not expired');\n var cred = this._credentials;\n if (cred && !this._isExpired(cred)) {\n logger.debug('credentials not changed and not expired, directly return');\n return Promise.resolve(cred);\n }\n logger.debug('need to get a new credential or refresh the existing one');\n if (Amplify.Auth &&\n typeof Amplify.Auth.currentUserCredentials === 'function') {\n return Amplify.Auth.currentUserCredentials();\n }\n else {\n return Promise.reject('No Auth module registered in Amplify');\n }\n };\n Credentials.prototype.refreshFederatedToken = function (federatedInfo) {\n var _this = this;\n logger.debug('Getting federated credentials');\n var provider = federatedInfo.provider, user = federatedInfo.user;\n var token = federatedInfo.token;\n var expires_at = federatedInfo.expires_at;\n var identity_id = federatedInfo.identity_id;\n var that = this;\n logger.debug('checking if federated jwt token expired');\n if (expires_at > new Date().getTime()) {\n // if not expired\n logger.debug('token not expired');\n return this._setCredentialsFromFederation({\n provider: provider,\n token: token,\n user: user,\n identity_id: identity_id,\n expires_at: expires_at,\n });\n }\n else {\n // if refresh handler exists\n if (that._refreshHandlers[provider] &&\n typeof that._refreshHandlers[provider] === 'function') {\n logger.debug('getting refreshed jwt token from federation provider');\n return that._refreshHandlers[provider]()\n .then(function (data) {\n logger.debug('refresh federated token sucessfully', data);\n token = data.token;\n identity_id = data.identity_id;\n expires_at = data.expires_at;\n return that._setCredentialsFromFederation({\n provider: provider,\n token: token,\n user: user,\n identity_id: identity_id,\n expires_at: expires_at,\n });\n })\n .catch(function (e) {\n logger.debug('refresh federated token failed', e);\n _this.clear();\n return Promise.reject('refreshing federation token failed: ' + e);\n });\n }\n else {\n logger.debug('no refresh handler for provider:', provider);\n this.clear();\n return Promise.reject('no refresh handler for provider');\n }\n }\n };\n Credentials.prototype._isExpired = function (credentials) {\n if (!credentials) {\n logger.debug('no credentials for expiration check');\n return true;\n }\n logger.debug('is this credentials expired?', credentials);\n var ts = new Date().getTime();\n var delta = 10 * 60 * 1000; // 10 minutes\n var expired = credentials.expired, expireTime = credentials.expireTime;\n if (!expired && expireTime > ts + delta) {\n return false;\n }\n return true;\n };\n Credentials.prototype._setCredentialsForGuest = function () {\n return __awaiter(this, void 0, void 0, function () {\n var attempted, _a, identityPoolId, region, mandatorySignIn, identityId, e_1, credentials, that;\n var _this = this;\n return __generator(this, function (_b) {\n switch (_b.label) {\n case 0:\n attempted = false;\n logger.debug('setting credentials for guest');\n _a = this._config, identityPoolId = _a.identityPoolId, region = _a.region, mandatorySignIn = _a.mandatorySignIn;\n if (mandatorySignIn) {\n return [2 /*return*/, Promise.reject('cannot get guest credentials when mandatory signin enabled')];\n }\n if (!identityPoolId) {\n logger.debug('No Cognito Federated Identity pool provided');\n return [2 /*return*/, Promise.reject('No Cognito Federated Identity pool provided')];\n }\n identityId = undefined;\n _b.label = 1;\n case 1:\n _b.trys.push([1, 3, , 4]);\n return [4 /*yield*/, this._storageSync];\n case 2:\n _b.sent();\n identityId = this._storage.getItem('CognitoIdentityId-' + identityPoolId);\n return [3 /*break*/, 4];\n case 3:\n e_1 = _b.sent();\n logger.debug('Failed to get the cached identityId', e_1);\n return [3 /*break*/, 4];\n case 4:\n credentials = new AWS.CognitoIdentityCredentials({\n IdentityPoolId: identityPoolId,\n IdentityId: identityId ? identityId : undefined,\n }, {\n region: region,\n });\n that = this;\n return [2 /*return*/, this._loadCredentials(credentials, 'guest', false, null)\n .then(function (res) {\n return res;\n })\n .catch(function (e) { return __awaiter(_this, void 0, void 0, function () {\n var newCredentials;\n return __generator(this, function (_a) {\n // If identity id is deleted in the console, we make one attempt to recreate it\n // and remove existing id from cache.\n if (e.code === 'ResourceNotFoundException' &&\n e.message === \"Identity '\" + identityId + \"' not found.\" &&\n !attempted) {\n attempted = true;\n logger.debug('Failed to load guest credentials');\n this._storage.removeItem('CognitoIdentityId-' + identityPoolId);\n credentials.clearCachedId();\n newCredentials = new AWS.CognitoIdentityCredentials({\n IdentityPoolId: identityPoolId,\n IdentityId: undefined,\n }, {\n region: region,\n });\n return [2 /*return*/, this._loadCredentials(newCredentials, 'guest', false, null)];\n }\n else {\n return [2 /*return*/, e];\n }\n return [2 /*return*/];\n });\n }); })];\n }\n });\n });\n };\n Credentials.prototype._setCredentialsFromAWS = function () {\n var credentials = AWS.config.credentials;\n logger.debug('setting credentials from aws');\n var that = this;\n if (credentials instanceof AWS.Credentials) {\n return Promise.resolve(credentials);\n }\n else {\n logger.debug('AWS.config.credentials is not an instance of AWS Credentials');\n return Promise.reject('AWS.config.credentials is not an instance of AWS Credentials');\n }\n };\n Credentials.prototype._setCredentialsFromFederation = function (params) {\n var provider = params.provider, token = params.token, identity_id = params.identity_id, user = params.user, expires_at = params.expires_at;\n var domains = {\n google: 'accounts.google.com',\n facebook: 'graph.facebook.com',\n amazon: 'www.amazon.com',\n developer: 'cognito-identity.amazonaws.com',\n };\n // Use custom provider url instead of the predefined ones\n var domain = domains[provider] || provider;\n if (!domain) {\n return Promise.reject('You must specify a federated provider');\n }\n var logins = {};\n logins[domain] = token;\n var _a = this._config, identityPoolId = _a.identityPoolId, region = _a.region;\n if (!identityPoolId) {\n logger.debug('No Cognito Federated Identity pool provided');\n return Promise.reject('No Cognito Federated Identity pool provided');\n }\n var credentials = new AWS.CognitoIdentityCredentials({\n IdentityPoolId: identityPoolId,\n IdentityId: identity_id,\n Logins: logins,\n }, {\n region: region,\n });\n return this._loadCredentials(credentials, 'federated', true, params);\n };\n Credentials.prototype._setCredentialsFromSession = function (session) {\n logger.debug('set credentials from session');\n var idToken = session.getIdToken().getJwtToken();\n var _a = this._config, region = _a.region, userPoolId = _a.userPoolId, identityPoolId = _a.identityPoolId;\n if (!identityPoolId) {\n logger.debug('No Cognito Federated Identity pool provided');\n return Promise.reject('No Cognito Federated Identity pool provided');\n }\n var key = 'cognito-idp.' + region + '.amazonaws.com/' + userPoolId;\n var logins = {};\n logins[key] = idToken;\n var credentials = new AWS.CognitoIdentityCredentials({\n IdentityPoolId: identityPoolId,\n Logins: logins,\n }, {\n region: region,\n });\n return this._loadCredentials(credentials, 'userPool', true, null);\n };\n Credentials.prototype._loadCredentials = function (credentials, source, authenticated, info) {\n var _this = this;\n var that = this;\n var identityPoolId = this._config.identityPoolId;\n return new Promise(function (res, rej) {\n credentials.get(function (err) { return __awaiter(_this, void 0, void 0, function () {\n var user, provider, token, expires_at, identity_id, e_2;\n return __generator(this, function (_a) {\n switch (_a.label) {\n case 0:\n if (err) {\n logger.debug('Failed to load credentials', credentials);\n rej(err);\n return [2 /*return*/];\n }\n logger.debug('Load credentials successfully', credentials);\n that._credentials = credentials;\n that._credentials.authenticated = authenticated;\n that._credentials_source = source;\n if (!(source === 'federated')) return [3 /*break*/, 3];\n user = Object.assign({ id: this._credentials.identityId }, info.user);\n provider = info.provider, token = info.token, expires_at = info.expires_at, identity_id = info.identity_id;\n try {\n this._storage.setItem('aws-amplify-federatedInfo', JSON.stringify({\n provider: provider,\n token: token,\n user: user,\n expires_at: expires_at,\n identity_id: identity_id,\n }));\n }\n catch (e) {\n logger.debug('Failed to put federated info into auth storage', e);\n }\n if (!(Amplify.Cache && typeof Amplify.Cache.setItem === 'function')) return [3 /*break*/, 2];\n return [4 /*yield*/, Amplify.Cache.setItem('federatedInfo', {\n provider: provider,\n token: token,\n user: user,\n expires_at: expires_at,\n identity_id: identity_id,\n }, { priority: 1 })];\n case 1:\n _a.sent();\n return [3 /*break*/, 3];\n case 2:\n logger.debug('No Cache module registered in Amplify');\n _a.label = 3;\n case 3:\n if (!(source === 'guest')) return [3 /*break*/, 7];\n _a.label = 4;\n case 4:\n _a.trys.push([4, 6, , 7]);\n return [4 /*yield*/, this._storageSync];\n case 5:\n _a.sent();\n this._storage.setItem('CognitoIdentityId-' + identityPoolId, credentials.identityId);\n return [3 /*break*/, 7];\n case 6:\n e_2 = _a.sent();\n logger.debug('Failed to cache identityId', e_2);\n return [3 /*break*/, 7];\n case 7:\n res(that._credentials);\n return [2 /*return*/];\n }\n });\n }); });\n });\n };\n Credentials.prototype.set = function (params, source) {\n if (source === 'session') {\n return this._setCredentialsFromSession(params);\n }\n else if (source === 'federation') {\n return this._setCredentialsFromFederation(params);\n }\n else if (source === 'guest') {\n return this._setCredentialsForGuest();\n }\n else {\n logger.debug('no source specified for setting credentials');\n return Promise.reject('invalid source');\n }\n };\n Credentials.prototype.clear = function () {\n return __awaiter(this, void 0, void 0, function () {\n var _a, identityPoolId, region, credentials;\n return __generator(this, function (_b) {\n switch (_b.label) {\n case 0:\n _a = this._config, identityPoolId = _a.identityPoolId, region = _a.region;\n if (identityPoolId) {\n credentials = new AWS.CognitoIdentityCredentials({\n IdentityPoolId: identityPoolId,\n }, {\n region: region,\n });\n credentials.clearCachedId();\n }\n this._credentials = null;\n this._credentials_source = null;\n this._storage.removeItem('aws-amplify-federatedInfo');\n if (!(Amplify.Cache && typeof Amplify.Cache.setItem === 'function')) return [3 /*break*/, 2];\n return [4 /*yield*/, Amplify.Cache.removeItem('federatedInfo')];\n case 1:\n _b.sent();\n return [3 /*break*/, 3];\n case 2:\n logger.debug('No Cache module registered in Amplify');\n _b.label = 3;\n case 3: return [2 /*return*/];\n }\n });\n });\n };\n /**\n * Compact version of credentials\n * @param {Object} credentials\n * @return {Object} - Credentials\n */\n Credentials.prototype.shear = function (credentials) {\n return {\n accessKeyId: credentials.accessKeyId,\n sessionToken: credentials.sessionToken,\n secretAccessKey: credentials.secretAccessKey,\n identityId: credentials.identityId,\n authenticated: credentials.authenticated,\n };\n };\n return Credentials;\n}());\nexport { Credentials };\nvar instance = new Credentials(null);\nexport default instance;\n//# sourceMappingURL=Credentials.js.map","/**\n * Copyright 2018 Amazon.com, Inc. or its affiliates. All Rights Reserved.\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\"). You may not use this file except in compliance with\n * the License. A copy of the License is located at\n *\n * http://aws.amazon.com/apache2.0/\n *\n * or in the \"license\" file accompanying this file. This file is distributed on an \"AS IS\" BASIS, WITHOUT WARRANTIES OR\n * CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions\n * and limitations under the License.\n */\nimport { ConsoleLogger as Logger } from '../Logger';\nimport JS from '../JS';\nimport Amplify from '../Amplify';\n/**\n * Provides a means to registering a service worker in the browser\n * and communicating with it via postMessage events.\n * https://developer.mozilla.org/en-US/docs/Web/API/Service_Worker_API/\n *\n * postMessage events are currently not supported in all browsers. See:\n * https://developer.mozilla.org/en-US/docs/Web/API/Service_Worker_API\n *\n * At the minmum this class will register the service worker and listen\n * and attempt to dispatch messages on state change and record analytics\n * events based on the service worker lifecycle.\n */\nvar ServiceWorkerClass = /** @class */ (function () {\n function ServiceWorkerClass() {\n // The AWS Amplify logger\n this._logger = new Logger('ServiceWorker');\n }\n Object.defineProperty(ServiceWorkerClass.prototype, \"serviceWorker\", {\n /**\n * Get the currently active service worker\n */\n get: function () {\n return this._serviceWorker;\n },\n enumerable: true,\n configurable: true\n });\n /**\n * Register the service-worker.js file in the browser\n * Make sure the service-worker.js is part of the build\n * for example with Angular, modify the angular-cli.json file\n * and add to \"assets\" array \"service-worker.js\"\n * @param {string} - (optional) Service worker file. Defaults to \"/service-worker.js\"\n * @param {string} - (optional) The service worker scope. Defaults to \"/\"\n * - API Doc: https://developer.mozilla.org/en-US/docs/Web/API/ServiceWorkerContainer/register\n * @returns {Promise}\n *\t- resolve(ServiceWorkerRegistration)\n *\t- reject(Error)\n **/\n ServiceWorkerClass.prototype.register = function (filePath, scope) {\n var _this = this;\n if (filePath === void 0) { filePath = '/service-worker.js'; }\n if (scope === void 0) { scope = '/'; }\n this._logger.debug(\"registering \" + filePath);\n this._logger.debug(\"registering service worker with scope \" + scope);\n return new Promise(function (resolve, reject) {\n if (navigator && 'serviceWorker' in navigator) {\n navigator.serviceWorker\n .register(filePath, {\n scope: scope,\n })\n .then(function (registration) {\n if (registration.installing) {\n _this._serviceWorker = registration.installing;\n }\n else if (registration.waiting) {\n _this._serviceWorker = registration.waiting;\n }\n else if (registration.active) {\n _this._serviceWorker = registration.active;\n }\n _this._registration = registration;\n _this._setupListeners();\n _this._logger.debug(\"Service Worker Registration Success: \" + registration);\n return resolve(registration);\n })\n .catch(function (error) {\n _this._logger.debug(\"Service Worker Registration Failed \" + error);\n return reject(error);\n });\n }\n else {\n return reject(new Error('Service Worker not available'));\n }\n });\n };\n /**\n * Enable web push notifications. If not subscribed, a new subscription will\n * be created and registered.\n * \tTest Push Server: https://web-push-codelab.glitch.me/\n * \tPush Server Libraries: https://github.com/web-push-libs/\n * \tAPI Doc: https://developers.google.com/web/fundamentals/codelabs/push-notifications/\n * @param publicKey\n * @returns {Promise}\n * \t- resolve(PushSubscription)\n * - reject(Error)\n */\n ServiceWorkerClass.prototype.enablePush = function (publicKey) {\n var _this = this;\n if (!this._registration)\n throw new Error('Service Worker not registered');\n this._publicKey = publicKey;\n return new Promise(function (resolve, reject) {\n if (JS.browserOrNode().isBrowser) {\n _this._registration.pushManager.getSubscription().then(function (subscription) {\n if (subscription) {\n _this._subscription = subscription;\n _this._logger.debug(\"User is subscribed to push: \" + JSON.stringify(subscription));\n resolve(subscription);\n }\n else {\n _this._logger.debug(\"User is NOT subscribed to push\");\n return _this._registration.pushManager\n .subscribe({\n userVisibleOnly: true,\n applicationServerKey: _this._urlB64ToUint8Array(publicKey),\n })\n .then(function (subscription) {\n _this._subscription = subscription;\n _this._logger.debug(\"User subscribed: \" + JSON.stringify(subscription));\n resolve(subscription);\n })\n .catch(function (error) {\n _this._logger.error(error);\n });\n }\n });\n }\n else {\n return reject(new Error('Service Worker not available'));\n }\n });\n };\n /**\n * Convert a base64 encoded string to a Uint8 array for the push server key\n * @param base64String\n */\n ServiceWorkerClass.prototype._urlB64ToUint8Array = function (base64String) {\n var padding = '='.repeat((4 - (base64String.length % 4)) % 4);\n var base64 = (base64String + padding)\n .replace(/\\-/g, '+')\n .replace(/_/g, '/');\n var rawData = window.atob(base64);\n var outputArray = new Uint8Array(rawData.length);\n for (var i = 0; i < rawData.length; ++i) {\n outputArray[i] = rawData.charCodeAt(i);\n }\n return outputArray;\n };\n /**\n * Send a message to the service worker. The service worker needs\n * to implement `self.addEventListener('message') to handle the\n * message. This ***currently*** does not work in Safari or IE.\n * @param {object | string} - An arbitrary JSON object or string message to send to the service worker\n *\t- see: https://developer.mozilla.org/en-US/docs/Web/API/Transferable\n * @returns {Promise}\n **/\n ServiceWorkerClass.prototype.send = function (message) {\n if (this._serviceWorker) {\n this._serviceWorker.postMessage(typeof message === 'object' ? JSON.stringify(message) : message);\n }\n };\n /**\n * Listen for service worker state change and message events\n * https://developer.mozilla.org/en-US/docs/Web/API/ServiceWorker/state\n **/\n ServiceWorkerClass.prototype._setupListeners = function () {\n var _this = this;\n this._serviceWorker.addEventListener('statechange', function (event) {\n var currentState = _this._serviceWorker.state;\n _this._logger.debug(\"ServiceWorker statechange: \" + currentState);\n if (Amplify.Analytics && typeof Amplify.Analytics.record === 'function') {\n Amplify.Analytics.record({\n name: 'ServiceWorker',\n attributes: {\n state: currentState,\n },\n });\n }\n });\n this._serviceWorker.addEventListener('message', function (event) {\n _this._logger.debug(\"ServiceWorker message event: \" + event);\n });\n };\n return ServiceWorkerClass;\n}());\nexport default ServiceWorkerClass;\n//# sourceMappingURL=ServiceWorker.js.map","/*\n * Copyright 2017-2017 Amazon.com, Inc. or its affiliates. All Rights Reserved.\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\"). You may not use this file except in compliance with\n * the License. A copy of the License is located at\n *\n * http://aws.amazon.com/apache2.0/\n *\n * or in the \"license\" file accompanying this file. This file is distributed on an \"AS IS\" BASIS, WITHOUT WARRANTIES OR\n * CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions\n * and limitations under the License.\n */\nvar packageInfo = require('../../package.json');\nvar Platform = {\n userAgent: \"aws-amplify/\" + packageInfo.version + \" js\",\n product: '',\n navigator: null,\n isReactNative: false,\n};\nif (typeof navigator !== 'undefined' && navigator.product) {\n Platform.product = navigator.product || '';\n Platform.navigator = navigator || null;\n switch (navigator.product) {\n case 'ReactNative':\n Platform.userAgent = \"aws-amplify/\" + packageInfo.version + \" react-native\";\n Platform.isReactNative = true;\n break;\n default:\n Platform.userAgent = \"aws-amplify/\" + packageInfo.version + \" js\";\n Platform.isReactNative = false;\n break;\n }\n}\nexport default Platform;\n//# sourceMappingURL=index.js.map","\"use strict\";\nObject.defineProperty(exports, \"__esModule\", { value: true });\nvar tslib_1 = require(\"tslib\");\ntslib_1.__exportStar(require(\"./EventStreamMarshaller\"), exports);\ntslib_1.__exportStar(require(\"./Int64\"), exports);\n//# sourceMappingURL=index.js.map","function toVal(mix) {\n\tvar k, y, str='';\n\tif (mix) {\n\t\tif (typeof mix === 'object') {\n\t\t\tif (!!mix.push) {\n\t\t\t\tfor (k=0; k < mix.length; k++) {\n\t\t\t\t\tif (mix[k] && (y = toVal(mix[k]))) {\n\t\t\t\t\t\tstr && (str += ' ');\n\t\t\t\t\t\tstr += y;\n\t\t\t\t\t}\n\t\t\t\t}\n\t\t\t} else {\n\t\t\t\tfor (k in mix) {\n\t\t\t\t\tif (mix[k] && (y = toVal(k))) {\n\t\t\t\t\t\tstr && (str += ' ');\n\t\t\t\t\t\tstr += y;\n\t\t\t\t\t}\n\t\t\t\t}\n\t\t\t}\n\t\t} else if (typeof mix !== 'boolean' && !mix.call) {\n\t\t\tstr && (str += ' ');\n\t\t\tstr += mix;\n\t\t}\n\t}\n\treturn str;\n}\n\nexport default function () {\n\tvar i=0, x, str='';\n\twhile (i < arguments.length) {\n\t\tif (x = toVal(arguments[i++])) {\n\t\t\tstr && (str += ' ');\n\t\t\tstr += x\n\t\t}\n\t}\n\treturn str;\n}\n","import objectWithoutPropertiesLoose from \"./objectWithoutPropertiesLoose\";\nexport default function _objectWithoutProperties(source, excluded) {\n if (source == null) return {};\n var target = objectWithoutPropertiesLoose(source, excluded);\n var key, i;\n\n if (Object.getOwnPropertySymbols) {\n var sourceSymbolKeys = Object.getOwnPropertySymbols(source);\n\n for (i = 0; i < sourceSymbolKeys.length; i++) {\n key = sourceSymbolKeys[i];\n if (excluded.indexOf(key) >= 0) continue;\n if (!Object.prototype.propertyIsEnumerable.call(source, key)) continue;\n target[key] = source[key];\n }\n }\n\n return target;\n}","/**\n * The main AWS namespace\n */\nvar AWS = { util: require('./util') };\n\n/**\n * @api private\n * @!macro [new] nobrowser\n * @note This feature is not supported in the browser environment of the SDK.\n */\nvar _hidden = {}; _hidden.toString(); // hack to parse macro\n\n/**\n * @api private\n */\nmodule.exports = AWS;\n\nAWS.util.update(AWS, {\n\n /**\n * @constant\n */\n VERSION: '2.518.0',\n\n /**\n * @api private\n */\n Signers: {},\n\n /**\n * @api private\n */\n Protocol: {\n Json: require('./protocol/json'),\n Query: require('./protocol/query'),\n Rest: require('./protocol/rest'),\n RestJson: require('./protocol/rest_json'),\n RestXml: require('./protocol/rest_xml')\n },\n\n /**\n * @api private\n */\n XML: {\n Builder: require('./xml/builder'),\n Parser: null // conditionally set based on environment\n },\n\n /**\n * @api private\n */\n JSON: {\n Builder: require('./json/builder'),\n Parser: require('./json/parser')\n },\n\n /**\n * @api private\n */\n Model: {\n Api: require('./model/api'),\n Operation: require('./model/operation'),\n Shape: require('./model/shape'),\n Paginator: require('./model/paginator'),\n ResourceWaiter: require('./model/resource_waiter')\n },\n\n /**\n * @api private\n */\n apiLoader: require('./api_loader'),\n\n /**\n * @api private\n */\n EndpointCache: require('../vendor/endpoint-cache').EndpointCache\n});\nrequire('./sequential_executor');\nrequire('./service');\nrequire('./config');\nrequire('./http');\nrequire('./event_listeners');\nrequire('./request');\nrequire('./response');\nrequire('./resource_waiter');\nrequire('./signers/request_signer');\nrequire('./param_validator');\n\n/**\n * @readonly\n * @return [AWS.SequentialExecutor] a collection of global event listeners that\n * are attached to every sent request.\n * @see AWS.Request AWS.Request for a list of events to listen for\n * @example Logging the time taken to send a request\n * AWS.events.on('send', function startSend(resp) {\n * resp.startTime = new Date().getTime();\n * }).on('complete', function calculateTime(resp) {\n * var time = (new Date().getTime() - resp.startTime) / 1000;\n * console.log('Request took ' + time + ' seconds');\n * });\n *\n * new AWS.S3().listBuckets(); // prints 'Request took 0.285 seconds'\n */\nAWS.events = new AWS.SequentialExecutor();\n\n//create endpoint cache lazily\nAWS.util.memoizedProperty(AWS, 'endpointCache', function() {\n return new AWS.EndpointCache(AWS.config.endpointCacheSize);\n}, true);\n","import _extends from \"@babel/runtime/helpers/esm/extends\";\nimport _objectWithoutProperties from \"@babel/runtime/helpers/esm/objectWithoutProperties\";\nimport React from 'react';\nimport PropTypes from 'prop-types';\nimport hoistNonReactStatics from 'hoist-non-react-statics';\nimport { chainPropTypes, getDisplayName } from '@material-ui/utils';\nimport makeStyles from '../makeStyles';\nimport getThemeProps from '../getThemeProps';\nimport useTheme from '../useTheme'; // Link a style sheet with a component.\n// It does not modify the component passed to it;\n// instead, it returns a new component, with a `classes` property.\n\nvar withStyles = function withStyles(stylesOrCreator) {\n var options = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : {};\n return function (Component) {\n var defaultTheme = options.defaultTheme,\n _options$withTheme = options.withTheme,\n withTheme = _options$withTheme === void 0 ? false : _options$withTheme,\n name = options.name,\n stylesOptions = _objectWithoutProperties(options, [\"defaultTheme\", \"withTheme\", \"name\"]);\n\n if (process.env.NODE_ENV !== 'production') {\n if (Component === undefined) {\n throw new Error(['You are calling withStyles(styles)(Component) with an undefined component.', 'You may have forgotten to import it.'].join('\\n'));\n }\n }\n\n var classNamePrefix = name;\n\n if (process.env.NODE_ENV !== 'production') {\n if (!name) {\n // Provide a better DX outside production.\n var displayName = getDisplayName(Component);\n\n if (displayName !== undefined) {\n classNamePrefix = displayName;\n }\n }\n }\n\n var useStyles = makeStyles(stylesOrCreator, _extends({\n defaultTheme: defaultTheme,\n Component: Component,\n name: name || Component.displayName,\n classNamePrefix: classNamePrefix\n }, stylesOptions));\n var WithStyles = React.forwardRef(function WithStyles(props, ref) {\n var classesProp = props.classes,\n innerRef = props.innerRef,\n other = _objectWithoutProperties(props, [\"classes\", \"innerRef\"]);\n\n var classes = useStyles(props);\n var theme;\n var more = other;\n\n if (typeof name === 'string' || withTheme) {\n // name and withTheme are invariant in the outer scope\n // eslint-disable-next-line react-hooks/rules-of-hooks\n theme = useTheme() || defaultTheme;\n\n if (name) {\n more = getThemeProps({\n theme: theme,\n name: name,\n props: other\n });\n } // Provide the theme to the wrapped component.\n // So we don't have to use the `withTheme()` Higher-order Component.\n\n\n if (withTheme && !more.theme) {\n more.theme = theme;\n }\n }\n\n return React.createElement(Component, _extends({\n ref: innerRef || ref,\n classes: classes\n }, more));\n });\n process.env.NODE_ENV !== \"production\" ? WithStyles.propTypes = {\n /**\n * Override or extend the styles applied to the component.\n */\n classes: PropTypes.object,\n\n /**\n * Use that prop to pass a ref to the decorated component.\n * @deprecated\n */\n innerRef: chainPropTypes(PropTypes.oneOfType([PropTypes.func, PropTypes.object]), function (props) {\n if (props.innerRef == null) {\n return null;\n }\n\n return null; // return new Error(\n // 'Material-UI: the `innerRef` prop is deprecated and will be removed in v5. ' +\n // 'Refs are now automatically forwarded to the inner component.',\n // );\n })\n } : void 0;\n\n if (process.env.NODE_ENV !== 'production') {\n WithStyles.displayName = \"WithStyles(\".concat(getDisplayName(Component), \")\");\n }\n\n hoistNonReactStatics(WithStyles, Component);\n\n if (process.env.NODE_ENV !== 'production') {\n // Exposed for test purposes.\n WithStyles.Naked = Component;\n WithStyles.options = options;\n WithStyles.useStyles = useStyles;\n }\n\n return WithStyles;\n };\n};\n\nexport default withStyles;","import _extends from \"@babel/runtime/helpers/esm/extends\";\nimport { withStyles as withStylesWithoutDefault } from '@material-ui/styles';\nimport defaultTheme from './defaultTheme';\n\nfunction withStyles(stylesOrCreator, options) {\n return withStylesWithoutDefault(stylesOrCreator, _extends({\n defaultTheme: defaultTheme\n }, options));\n}\n\nexport default withStyles;","module.exports = require(\"regenerator-runtime\");\n","/**\n * Copyright (c) 2013-present, Facebook, Inc.\n *\n * This source code is licensed under the MIT license found in the\n * LICENSE file in the root directory of this source tree.\n */\n\nif (process.env.NODE_ENV !== 'production') {\n var ReactIs = require('react-is');\n\n // By explicitly using `prop-types` you are opting into new development behavior.\n // http://fb.me/prop-types-in-prod\n var throwOnDirectAccess = true;\n module.exports = require('./factoryWithTypeCheckers')(ReactIs.isElement, throwOnDirectAccess);\n} else {\n // By explicitly using `prop-types` you are opting into new production behavior.\n // http://fb.me/prop-types-in-prod\n module.exports = require('./factoryWithThrowingShims')();\n}\n","var util = require('./util');\n\n// browser specific modules\nutil.crypto.lib = require('./browserCryptoLib');\nutil.Buffer = require('buffer/').Buffer;\nutil.url = require('url/');\nutil.querystring = require('querystring/');\nutil.realClock = require('./realclock/browserClock');\nutil.environment = 'js';\nutil.createEventStream = require('./event-stream/buffered-create-event-stream').createEventStream;\nutil.isBrowser = function() { return true; };\nutil.isNode = function() { return false; };\n\nvar AWS = require('./core');\n\n/**\n * @api private\n */\nmodule.exports = AWS;\n\nrequire('./credentials');\nrequire('./credentials/credential_provider_chain');\nrequire('./credentials/temporary_credentials');\nrequire('./credentials/chainable_temporary_credentials');\nrequire('./credentials/web_identity_credentials');\nrequire('./credentials/cognito_identity_credentials');\nrequire('./credentials/saml_credentials');\n\n// Load the DOMParser XML parser\nAWS.XML.Parser = require('./xml/browser_parser');\n\n// Load the XHR HttpClient\nrequire('./http/xhr');\n\nif (typeof process === 'undefined') {\n var process = {\n browser: true\n };\n}\n","import defineProperty from \"./defineProperty\";\n\nfunction ownKeys(object, enumerableOnly) {\n var keys = Object.keys(object);\n\n if (Object.getOwnPropertySymbols) {\n var symbols = Object.getOwnPropertySymbols(object);\n if (enumerableOnly) symbols = symbols.filter(function (sym) {\n return Object.getOwnPropertyDescriptor(object, sym).enumerable;\n });\n keys.push.apply(keys, symbols);\n }\n\n return keys;\n}\n\nexport default function _objectSpread2(target) {\n for (var i = 1; i < arguments.length; i++) {\n var source = arguments[i] != null ? arguments[i] : {};\n\n if (i % 2) {\n ownKeys(Object(source), true).forEach(function (key) {\n defineProperty(target, key, source[key]);\n });\n } else if (Object.getOwnPropertyDescriptors) {\n Object.defineProperties(target, Object.getOwnPropertyDescriptors(source));\n } else {\n ownKeys(Object(source)).forEach(function (key) {\n Object.defineProperty(target, key, Object.getOwnPropertyDescriptor(source, key));\n });\n }\n }\n\n return target;\n}","// It should to be noted that this function isn't equivalent to `text-transform: capitalize`.\n//\n// A strict capitalization should uppercase the first letter of each word a the sentence.\n// We only handle the first word.\nexport default function capitalize(string) {\n if (process.env.NODE_ENV !== 'production') {\n if (typeof string !== 'string') {\n throw new Error('Material-UI: capitalize(string) expects a string argument.');\n }\n }\n\n return string.charAt(0).toUpperCase() + string.slice(1);\n}","function asyncGeneratorStep(gen, resolve, reject, _next, _throw, key, arg) {\n try {\n var info = gen[key](arg);\n var value = info.value;\n } catch (error) {\n reject(error);\n return;\n }\n\n if (info.done) {\n resolve(value);\n } else {\n Promise.resolve(value).then(_next, _throw);\n }\n}\n\nexport default function _asyncToGenerator(fn) {\n return function () {\n var self = this,\n args = arguments;\n return new Promise(function (resolve, reject) {\n var gen = fn.apply(self, args);\n\n function _next(value) {\n asyncGeneratorStep(gen, resolve, reject, _next, _throw, \"next\", value);\n }\n\n function _throw(err) {\n asyncGeneratorStep(gen, resolve, reject, _next, _throw, \"throw\", err);\n }\n\n _next(undefined);\n });\n };\n}","/*\n * Copyright 2017-2017 Amazon.com, Inc. or its affiliates. All Rights Reserved.\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\"). You may not use this file except in compliance with\n * the License. A copy of the License is located at\n *\n * http://aws.amazon.com/apache2.0/\n *\n * or in the \"license\" file accompanying this file. This file is distributed on an \"AS IS\" BASIS, WITHOUT WARRANTIES OR\n * CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions\n * and limitations under the License.\n */\nexport var CognitoHostedUIIdentityProvider;\n(function (CognitoHostedUIIdentityProvider) {\n CognitoHostedUIIdentityProvider[\"Cognito\"] = \"COGNITO\";\n CognitoHostedUIIdentityProvider[\"Google\"] = \"Google\";\n CognitoHostedUIIdentityProvider[\"Facebook\"] = \"Facebook\";\n CognitoHostedUIIdentityProvider[\"Amazon\"] = \"LoginWithAmazon\";\n})(CognitoHostedUIIdentityProvider || (CognitoHostedUIIdentityProvider = {}));\nexport function isFederatedSignInOptions(obj) {\n var keys = ['provider', 'customState'];\n return obj && !!keys.find(function (k) { return obj.hasOwnProperty(k); });\n}\nexport function isFederatedSignInOptionsCustom(obj) {\n var keys = [\n 'customProvider',\n 'customState',\n ];\n return obj && !!keys.find(function (k) { return obj.hasOwnProperty(k); });\n}\nexport function isCognitoHostedOpts(oauth) {\n return oauth.redirectSignIn !== undefined;\n}\nexport var AuthErrorTypes;\n(function (AuthErrorTypes) {\n AuthErrorTypes[\"NoConfig\"] = \"noConfig\";\n AuthErrorTypes[\"MissingAuthConfig\"] = \"missingAuthConfig\";\n AuthErrorTypes[\"EmptyUsername\"] = \"emptyUsername\";\n AuthErrorTypes[\"InvalidUsername\"] = \"invalidUsername\";\n AuthErrorTypes[\"EmptyPassword\"] = \"emptyPassword\";\n AuthErrorTypes[\"EmptyCode\"] = \"emptyCode\";\n AuthErrorTypes[\"SignUpError\"] = \"signUpError\";\n AuthErrorTypes[\"NoMFA\"] = \"noMFA\";\n AuthErrorTypes[\"InvalidMFA\"] = \"invalidMFA\";\n AuthErrorTypes[\"EmptyChallengeResponse\"] = \"emptyChallengeResponse\";\n AuthErrorTypes[\"NoUserSession\"] = \"noUserSession\";\n AuthErrorTypes[\"Default\"] = \"default\";\n})(AuthErrorTypes || (AuthErrorTypes = {}));\nexport function isUsernamePasswordOpts(obj) {\n return !!obj.username;\n}\n//# sourceMappingURL=Auth.js.map","/*\n * Copyright 2017-2019 Amazon.com, Inc. or its affiliates. All Rights Reserved.\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\"). You may not use this file except in compliance with\n * the License. A copy of the License is located at\n *\n * http://aws.amazon.com/apache2.0/\n *\n * or in the \"license\" file accompanying this file. This file is distributed on an \"AS IS\" BASIS, WITHOUT WARRANTIES OR\n * CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions\n * and limitations under the License.\n */\nvar __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, generator) {\n function adopt(value) { return value instanceof P ? value : new P(function (resolve) { resolve(value); }); }\n return new (P || (P = Promise))(function (resolve, reject) {\n function fulfilled(value) { try { step(generator.next(value)); } catch (e) { reject(e); } }\n function rejected(value) { try { step(generator[\"throw\"](value)); } catch (e) { reject(e); } }\n function step(result) { result.done ? resolve(result.value) : adopt(result.value).then(fulfilled, rejected); }\n step((generator = generator.apply(thisArg, _arguments || [])).next());\n });\n};\nvar __generator = (this && this.__generator) || function (thisArg, body) {\n var _ = { label: 0, sent: function() { if (t[0] & 1) throw t[1]; return t[1]; }, trys: [], ops: [] }, f, y, t, g;\n return g = { next: verb(0), \"throw\": verb(1), \"return\": verb(2) }, typeof Symbol === \"function\" && (g[Symbol.iterator] = function() { return this; }), g;\n function verb(n) { return function (v) { return step([n, v]); }; }\n function step(op) {\n if (f) throw new TypeError(\"Generator is already executing.\");\n while (_) try {\n if (f = 1, y && (t = op[0] & 2 ? y[\"return\"] : op[0] ? y[\"throw\"] || ((t = y[\"return\"]) && t.call(y), 0) : y.next) && !(t = t.call(y, op[1])).done) return t;\n if (y = 0, t) op = [op[0] & 2, t.value];\n switch (op[0]) {\n case 0: case 1: t = op; break;\n case 4: _.label++; return { value: op[1], done: false };\n case 5: _.label++; y = op[1]; op = [0]; continue;\n case 7: op = _.ops.pop(); _.trys.pop(); continue;\n default:\n if (!(t = _.trys, t = t.length > 0 && t[t.length - 1]) && (op[0] === 6 || op[0] === 2)) { _ = 0; continue; }\n if (op[0] === 3 && (!t || (op[1] > t[0] && op[1] < t[3]))) { _.label = op[1]; break; }\n if (op[0] === 6 && _.label < t[1]) { _.label = t[1]; t = op; break; }\n if (t && _.label < t[2]) { _.label = t[2]; _.ops.push(op); break; }\n if (t[2]) _.ops.pop();\n _.trys.pop(); continue;\n }\n op = body.call(thisArg, _);\n } catch (e) { op = [6, e]; y = 0; } finally { f = t = 0; }\n if (op[0] & 5) throw op[1]; return { value: op[0] ? op[1] : void 0, done: true };\n }\n};\nimport { isUsernamePasswordOpts, isCognitoHostedOpts, isFederatedSignInOptions, isFederatedSignInOptionsCustom, } from './types';\nimport { AWS, ConsoleLogger as Logger, Constants, Hub, JS, Parser, Credentials, StorageHelper, } from '@aws-amplify/core';\nimport { CookieStorage, CognitoUserPool, AuthenticationDetails, CognitoUser, CognitoUserSession, CognitoUserAttribute, CognitoIdToken, CognitoRefreshToken, CognitoAccessToken, } from 'amazon-cognito-identity-js';\nimport { parse } from 'url';\nimport OAuth from './OAuth/OAuth';\nimport { default as urlListener } from './urlListener';\nimport { AuthError, NoUserPoolError } from './Errors';\nimport { AuthErrorTypes } from './types/Auth';\nvar logger = new Logger('AuthClass');\nvar USER_ADMIN_SCOPE = 'aws.cognito.signin.user.admin';\nvar AMPLIFY_SYMBOL = (typeof Symbol !== 'undefined' &&\n typeof Symbol.for === 'function'\n ? Symbol.for('amplify_default')\n : '@@amplify_default');\nvar dispatchAuthEvent = function (event, data, message) {\n Hub.dispatch('auth', { event: event, data: data, message: message }, 'Auth', AMPLIFY_SYMBOL);\n};\nexport var CognitoHostedUIIdentityProvider;\n(function (CognitoHostedUIIdentityProvider) {\n CognitoHostedUIIdentityProvider[\"Cognito\"] = \"COGNITO\";\n CognitoHostedUIIdentityProvider[\"Google\"] = \"Google\";\n CognitoHostedUIIdentityProvider[\"Facebook\"] = \"Facebook\";\n CognitoHostedUIIdentityProvider[\"Amazon\"] = \"LoginWithAmazon\";\n})(CognitoHostedUIIdentityProvider || (CognitoHostedUIIdentityProvider = {}));\n/**\n * Provide authentication steps\n */\nvar AuthClass = /** @class */ (function () {\n /**\n * Initialize Auth with AWS configurations\n * @param {Object} config - Configuration of the Auth\n */\n function AuthClass(config) {\n var _this = this;\n this.userPool = null;\n this.user = null;\n this.configure(config);\n this.currentUserCredentials = this.currentUserCredentials.bind(this);\n if (AWS.config) {\n AWS.config.update({ customUserAgent: Constants.userAgent });\n }\n else {\n logger.warn('No AWS.config');\n }\n Hub.listen('auth', function (_a) {\n var payload = _a.payload;\n var event = payload.event;\n switch (event) {\n case 'signIn':\n _this._storage.setItem('amplify-signin-with-hostedUI', 'false');\n break;\n case 'signOut':\n _this._storage.removeItem('amplify-signin-with-hostedUI');\n break;\n case 'cognitoHostedUI':\n _this._storage.setItem('amplify-signin-with-hostedUI', 'true');\n break;\n }\n });\n }\n AuthClass.prototype.getModuleName = function () {\n return 'Auth';\n };\n AuthClass.prototype.configure = function (config) {\n var _this = this;\n if (!config)\n return this._config || {};\n logger.debug('configure Auth');\n var conf = Object.assign({}, this._config, Parser.parseMobilehubConfig(config).Auth, config);\n this._config = conf;\n var _a = this._config, userPoolId = _a.userPoolId, userPoolWebClientId = _a.userPoolWebClientId, cookieStorage = _a.cookieStorage, oauth = _a.oauth, region = _a.region, identityPoolId = _a.identityPoolId, mandatorySignIn = _a.mandatorySignIn, refreshHandlers = _a.refreshHandlers, identityPoolRegion = _a.identityPoolRegion, clientMetadata = _a.clientMetadata;\n if (!this._config.storage) {\n // backward compatbility\n if (cookieStorage)\n this._storage = new CookieStorage(cookieStorage);\n else {\n this._storage = new StorageHelper().getStorage();\n }\n }\n else {\n if (!this._isValidAuthStorage(this._config.storage)) {\n logger.error('The storage in the Auth config is not valid!');\n throw new Error('Empty storage object');\n }\n this._storage = this._config.storage;\n }\n this._storageSync = Promise.resolve();\n if (typeof this._storage['sync'] === 'function') {\n this._storageSync = this._storage['sync']();\n }\n if (userPoolId) {\n var userPoolData = {\n UserPoolId: userPoolId,\n ClientId: userPoolWebClientId,\n };\n userPoolData.Storage = this._storage;\n this.userPool = new CognitoUserPool(userPoolData);\n }\n Credentials.configure({\n mandatorySignIn: mandatorySignIn,\n region: identityPoolRegion || region,\n userPoolId: userPoolId,\n identityPoolId: identityPoolId,\n refreshHandlers: refreshHandlers,\n storage: this._storage,\n });\n // initiailize cognitoauth client if hosted ui options provided\n // to keep backward compatibility:\n var cognitoHostedUIConfig = oauth\n ? isCognitoHostedOpts(this._config.oauth)\n ? oauth\n : oauth.awsCognito\n : undefined;\n if (cognitoHostedUIConfig) {\n var cognitoAuthParams = Object.assign({\n cognitoClientId: userPoolWebClientId,\n UserPoolId: userPoolId,\n domain: cognitoHostedUIConfig['domain'],\n scopes: cognitoHostedUIConfig['scope'],\n redirectSignIn: cognitoHostedUIConfig['redirectSignIn'],\n redirectSignOut: cognitoHostedUIConfig['redirectSignOut'],\n responseType: cognitoHostedUIConfig['responseType'],\n Storage: this._storage,\n urlOpener: cognitoHostedUIConfig['urlOpener'],\n clientMetadata: clientMetadata,\n }, cognitoHostedUIConfig['options']);\n this._oAuthHandler = new OAuth({\n scopes: cognitoAuthParams.scopes,\n config: cognitoAuthParams,\n cognitoClientId: cognitoAuthParams.cognitoClientId,\n });\n // **NOTE** - Remove this in a future major release as it is a breaking change\n urlListener(function (_a) {\n var url = _a.url;\n _this._handleAuthResponse(url);\n });\n }\n dispatchAuthEvent('configured', null, \"The Auth category has been configured successfully\");\n return this._config;\n };\n /**\n * Sign up with username, password and other attrbutes like phone, email\n * @param {String | object} params - The user attirbutes used for signin\n * @param {String[]} restOfAttrs - for the backward compatability\n * @return - A promise resolves callback data if success\n */\n AuthClass.prototype.signUp = function (params) {\n var _this = this;\n var restOfAttrs = [];\n for (var _i = 1; _i < arguments.length; _i++) {\n restOfAttrs[_i - 1] = arguments[_i];\n }\n if (!this.userPool) {\n return this.rejectNoUserPool();\n }\n var username = null;\n var password = null;\n var attributes = [];\n var validationData = null;\n var clientMetadata;\n if (params && typeof params === 'string') {\n username = params;\n password = restOfAttrs ? restOfAttrs[0] : null;\n var email = restOfAttrs ? restOfAttrs[1] : null;\n var phone_number = restOfAttrs ? restOfAttrs[2] : null;\n if (email)\n attributes.push({ Name: 'email', Value: email });\n if (phone_number)\n attributes.push({ Name: 'phone_number', Value: phone_number });\n }\n else if (params && typeof params === 'object') {\n username = params['username'];\n password = params['password'];\n if (params && params.clientMetadata) {\n clientMetadata = params.clientMetadata;\n }\n else if (this._config.clientMetadata) {\n clientMetadata = this._config.clientMetadata;\n }\n var attrs_1 = params['attributes'];\n if (attrs_1) {\n Object.keys(attrs_1).map(function (key) {\n var ele = { Name: key, Value: attrs_1[key] };\n attributes.push(ele);\n });\n }\n validationData = params['validationData'] || null;\n }\n else {\n return this.rejectAuthError(AuthErrorTypes.SignUpError);\n }\n if (!username) {\n return this.rejectAuthError(AuthErrorTypes.EmptyUsername);\n }\n if (!password) {\n return this.rejectAuthError(AuthErrorTypes.EmptyPassword);\n }\n logger.debug('signUp attrs:', attributes);\n logger.debug('signUp validation data:', validationData);\n return new Promise(function (resolve, reject) {\n _this.userPool.signUp(username, password, attributes, validationData, function (err, data) {\n if (err) {\n dispatchAuthEvent('signUp_failure', err, username + \" failed to signup\");\n reject(err);\n }\n else {\n dispatchAuthEvent('signUp', data, username + \" has signed up successfully\");\n resolve(data);\n }\n }, clientMetadata);\n });\n };\n /**\n * Send the verfication code to confirm sign up\n * @param {String} username - The username to be confirmed\n * @param {String} code - The verification code\n * @param {ConfirmSignUpOptions} options - other options for confirm signup\n * @return - A promise resolves callback data if success\n */\n AuthClass.prototype.confirmSignUp = function (username, code, options) {\n if (!this.userPool) {\n return this.rejectNoUserPool();\n }\n if (!username) {\n return this.rejectAuthError(AuthErrorTypes.EmptyUsername);\n }\n if (!code) {\n return this.rejectAuthError(AuthErrorTypes.EmptyCode);\n }\n var user = this.createCognitoUser(username);\n var forceAliasCreation = options && typeof options.forceAliasCreation === 'boolean'\n ? options.forceAliasCreation\n : true;\n var clientMetadata;\n if (options && options.clientMetadata) {\n clientMetadata = options.clientMetadata;\n }\n else if (this._config.clientMetadata) {\n clientMetadata = this._config.clientMetadata;\n }\n return new Promise(function (resolve, reject) {\n user.confirmRegistration(code, forceAliasCreation, function (err, data) {\n if (err) {\n reject(err);\n }\n else {\n resolve(data);\n }\n }, clientMetadata);\n });\n };\n /**\n * Resend the verification code\n * @param {String} username - The username to be confirmed\n * @param {ClientMetadata} clientMetadata - Metadata to be passed to Cognito Lambda triggers\n * @return - A promise resolves data if success\n */\n AuthClass.prototype.resendSignUp = function (username, clientMetadata) {\n if (clientMetadata === void 0) { clientMetadata = this._config.clientMetadata; }\n if (!this.userPool) {\n return this.rejectNoUserPool();\n }\n if (!username) {\n return this.rejectAuthError(AuthErrorTypes.EmptyUsername);\n }\n var user = this.createCognitoUser(username);\n return new Promise(function (resolve, reject) {\n user.resendConfirmationCode(function (err, data) {\n if (err) {\n reject(err);\n }\n else {\n resolve(data);\n }\n }, clientMetadata);\n });\n };\n /**\n * Sign in\n * @param {String | SignInOpts} usernameOrSignInOpts - The username to be signed in or the sign in options\n * @param {String} password - The password of the username\n * @return - A promise resolves the CognitoUser\n */\n AuthClass.prototype.signIn = function (usernameOrSignInOpts, pw, clientMetadata) {\n if (clientMetadata === void 0) { clientMetadata = this._config.clientMetadata; }\n if (!this.userPool) {\n return this.rejectNoUserPool();\n }\n var username = null;\n var password = null;\n var validationData = {};\n // for backward compatibility\n if (typeof usernameOrSignInOpts === 'string') {\n username = usernameOrSignInOpts;\n password = pw;\n }\n else if (isUsernamePasswordOpts(usernameOrSignInOpts)) {\n if (typeof pw !== 'undefined') {\n logger.warn('The password should be defined under the first parameter object!');\n }\n username = usernameOrSignInOpts.username;\n password = usernameOrSignInOpts.password;\n validationData = usernameOrSignInOpts.validationData;\n }\n else {\n return this.rejectAuthError(AuthErrorTypes.InvalidUsername);\n }\n if (!username) {\n return this.rejectAuthError(AuthErrorTypes.EmptyUsername);\n }\n var authDetails = new AuthenticationDetails({\n Username: username,\n Password: password,\n ValidationData: validationData,\n ClientMetadata: clientMetadata,\n });\n if (password) {\n return this.signInWithPassword(authDetails);\n }\n else {\n return this.signInWithoutPassword(authDetails);\n }\n };\n /**\n * Return an object with the authentication callbacks\n * @param {CognitoUser} user - the cognito user object\n * @param {} resolve - function called when resolving the current step\n * @param {} reject - function called when rejecting the current step\n * @return - an object with the callback methods for user authentication\n */\n AuthClass.prototype.authCallbacks = function (user, resolve, reject) {\n var _this = this;\n var that = this;\n return {\n onSuccess: function (session) { return __awaiter(_this, void 0, void 0, function () {\n var cred, e_1, currentUser, e_2;\n return __generator(this, function (_a) {\n switch (_a.label) {\n case 0:\n logger.debug(session);\n delete user['challengeName'];\n delete user['challengeParam'];\n _a.label = 1;\n case 1:\n _a.trys.push([1, 4, 5, 9]);\n return [4 /*yield*/, Credentials.clear()];\n case 2:\n _a.sent();\n return [4 /*yield*/, Credentials.set(session, 'session')];\n case 3:\n cred = _a.sent();\n logger.debug('succeed to get cognito credentials', cred);\n return [3 /*break*/, 9];\n case 4:\n e_1 = _a.sent();\n logger.debug('cannot get cognito credentials', e_1);\n return [3 /*break*/, 9];\n case 5:\n _a.trys.push([5, 7, , 8]);\n return [4 /*yield*/, this.currentUserPoolUser()];\n case 6:\n currentUser = _a.sent();\n that.user = currentUser;\n dispatchAuthEvent('signIn', currentUser, \"A user \" + user.getUsername() + \" has been signed in\");\n resolve(currentUser);\n return [3 /*break*/, 8];\n case 7:\n e_2 = _a.sent();\n logger.error('Failed to get the signed in user', e_2);\n reject(e_2);\n return [3 /*break*/, 8];\n case 8: return [7 /*endfinally*/];\n case 9: return [2 /*return*/];\n }\n });\n }); },\n onFailure: function (err) {\n logger.debug('signIn failure', err);\n dispatchAuthEvent('signIn_failure', err, user.getUsername() + \" failed to signin\");\n reject(err);\n },\n customChallenge: function (challengeParam) {\n logger.debug('signIn custom challenge answer required');\n user['challengeName'] = 'CUSTOM_CHALLENGE';\n user['challengeParam'] = challengeParam;\n resolve(user);\n },\n mfaRequired: function (challengeName, challengeParam) {\n logger.debug('signIn MFA required');\n user['challengeName'] = challengeName;\n user['challengeParam'] = challengeParam;\n resolve(user);\n },\n mfaSetup: function (challengeName, challengeParam) {\n logger.debug('signIn mfa setup', challengeName);\n user['challengeName'] = challengeName;\n user['challengeParam'] = challengeParam;\n resolve(user);\n },\n newPasswordRequired: function (userAttributes, requiredAttributes) {\n logger.debug('signIn new password');\n user['challengeName'] = 'NEW_PASSWORD_REQUIRED';\n user['challengeParam'] = {\n userAttributes: userAttributes,\n requiredAttributes: requiredAttributes,\n };\n resolve(user);\n },\n totpRequired: function (challengeName, challengeParam) {\n logger.debug('signIn totpRequired');\n user['challengeName'] = challengeName;\n user['challengeParam'] = challengeParam;\n resolve(user);\n },\n selectMFAType: function (challengeName, challengeParam) {\n logger.debug('signIn selectMFAType', challengeName);\n user['challengeName'] = challengeName;\n user['challengeParam'] = challengeParam;\n resolve(user);\n },\n };\n };\n /**\n * Sign in with a password\n * @private\n * @param {AuthenticationDetails} authDetails - the user sign in data\n * @return - A promise resolves the CognitoUser object if success or mfa required\n */\n AuthClass.prototype.signInWithPassword = function (authDetails) {\n var _this = this;\n var user = this.createCognitoUser(authDetails.getUsername());\n return new Promise(function (resolve, reject) {\n user.authenticateUser(authDetails, _this.authCallbacks(user, resolve, reject));\n });\n };\n /**\n * Sign in without a password\n * @private\n * @param {AuthenticationDetails} authDetails - the user sign in data\n * @return - A promise resolves the CognitoUser object if success or mfa required\n */\n AuthClass.prototype.signInWithoutPassword = function (authDetails) {\n var _this = this;\n var user = this.createCognitoUser(authDetails.getUsername());\n user.setAuthenticationFlowType('CUSTOM_AUTH');\n return new Promise(function (resolve, reject) {\n user.initiateAuth(authDetails, _this.authCallbacks(user, resolve, reject));\n });\n };\n /**\n * get user current preferred mfa option\n * this method doesn't work with totp, we need to deprecate it.\n * @deprecated\n * @param {CognitoUser} user - the current user\n * @return - A promise resolves the current preferred mfa option if success\n */\n AuthClass.prototype.getMFAOptions = function (user) {\n return new Promise(function (res, rej) {\n user.getMFAOptions(function (err, mfaOptions) {\n if (err) {\n logger.debug('get MFA Options failed', err);\n rej(err);\n return;\n }\n logger.debug('get MFA options success', mfaOptions);\n res(mfaOptions);\n return;\n });\n });\n };\n /**\n * get preferred mfa method\n * @param {CognitoUser} user - the current cognito user\n * @param {GetPreferredMFAOpts} params - options for getting the current user preferred MFA\n */\n AuthClass.prototype.getPreferredMFA = function (user, params) {\n var that = this;\n return new Promise(function (res, rej) {\n var bypassCache = params ? params.bypassCache : false;\n user.getUserData(function (err, data) {\n if (err) {\n logger.debug('getting preferred mfa failed', err);\n rej(err);\n return;\n }\n var mfaType = that._getMfaTypeFromUserData(data);\n if (!mfaType) {\n rej('invalid MFA Type');\n return;\n }\n else {\n res(mfaType);\n return;\n }\n }, { bypassCache: bypassCache });\n });\n };\n AuthClass.prototype._getMfaTypeFromUserData = function (data) {\n var ret = null;\n var preferredMFA = data.PreferredMfaSetting;\n // if the user has used Auth.setPreferredMFA() to setup the mfa type\n // then the \"PreferredMfaSetting\" would exist in the response\n if (preferredMFA) {\n ret = preferredMFA;\n }\n else {\n // if mfaList exists but empty, then its noMFA\n var mfaList = data.UserMFASettingList;\n if (!mfaList) {\n // if SMS was enabled by using Auth.enableSMS(),\n // the response would contain MFAOptions\n // as for now Cognito only supports for SMS, so we will say it is 'SMS_MFA'\n // if it does not exist, then it should be NOMFA\n var MFAOptions = data.MFAOptions;\n if (MFAOptions) {\n ret = 'SMS_MFA';\n }\n else {\n ret = 'NOMFA';\n }\n }\n else if (mfaList.length === 0) {\n ret = 'NOMFA';\n }\n else {\n logger.debug('invalid case for getPreferredMFA', data);\n }\n }\n return ret;\n };\n AuthClass.prototype._getUserData = function (user, params) {\n return new Promise(function (res, rej) {\n user.getUserData(function (err, data) {\n if (err) {\n logger.debug('getting user data failed', err);\n rej(err);\n return;\n }\n else {\n res(data);\n return;\n }\n }, params);\n });\n };\n /**\n * set preferred MFA method\n * @param {CognitoUser} user - the current Cognito user\n * @param {string} mfaMethod - preferred mfa method\n * @return - A promise resolve if success\n */\n AuthClass.prototype.setPreferredMFA = function (user, mfaMethod) {\n return __awaiter(this, void 0, void 0, function () {\n var userData, smsMfaSettings, totpMfaSettings, _a, mfaList, currentMFAType, that;\n return __generator(this, function (_b) {\n switch (_b.label) {\n case 0: return [4 /*yield*/, this._getUserData(user, { bypassCache: true })];\n case 1:\n userData = _b.sent();\n smsMfaSettings = null;\n totpMfaSettings = null;\n _a = mfaMethod;\n switch (_a) {\n case 'TOTP' || 'SOFTWARE_TOKEN_MFA': return [3 /*break*/, 2];\n case 'SMS' || 'SMS_MFA': return [3 /*break*/, 3];\n case 'NOMFA': return [3 /*break*/, 4];\n }\n return [3 /*break*/, 6];\n case 2:\n totpMfaSettings = {\n PreferredMfa: true,\n Enabled: true,\n };\n return [3 /*break*/, 7];\n case 3:\n smsMfaSettings = {\n PreferredMfa: true,\n Enabled: true,\n };\n return [3 /*break*/, 7];\n case 4:\n mfaList = userData['UserMFASettingList'];\n return [4 /*yield*/, this._getMfaTypeFromUserData(userData)];\n case 5:\n currentMFAType = _b.sent();\n if (currentMFAType === 'NOMFA') {\n return [2 /*return*/, Promise.resolve('No change for mfa type')];\n }\n else if (currentMFAType === 'SMS_MFA') {\n smsMfaSettings = {\n PreferredMfa: false,\n Enabled: false,\n };\n }\n else if (currentMFAType === 'SOFTWARE_TOKEN_MFA') {\n totpMfaSettings = {\n PreferredMfa: false,\n Enabled: false,\n };\n }\n else {\n return [2 /*return*/, this.rejectAuthError(AuthErrorTypes.InvalidMFA)];\n }\n // if there is a UserMFASettingList in the response\n // we need to disable every mfa type in that list\n if (mfaList && mfaList.length !== 0) {\n // to disable SMS or TOTP if exists in that list\n mfaList.forEach(function (mfaType) {\n if (mfaType === 'SMS_MFA') {\n smsMfaSettings = {\n PreferredMfa: false,\n Enabled: false,\n };\n }\n else if (mfaType === 'SOFTWARE_TOKEN_MFA') {\n totpMfaSettings = {\n PreferredMfa: false,\n Enabled: false,\n };\n }\n });\n }\n return [3 /*break*/, 7];\n case 6:\n logger.debug('no validmfa method provided');\n return [2 /*return*/, this.rejectAuthError(AuthErrorTypes.NoMFA)];\n case 7:\n that = this;\n return [2 /*return*/, new Promise(function (res, rej) {\n user.setUserMfaPreference(smsMfaSettings, totpMfaSettings, function (err, result) {\n if (err) {\n logger.debug('Set user mfa preference error', err);\n return rej(err);\n }\n logger.debug('Set user mfa success', result);\n logger.debug('Caching the latest user data into local');\n // cache the latest result into user data\n user.getUserData(function (err, data) {\n if (err) {\n logger.debug('getting user data failed', err);\n return rej(err);\n }\n else {\n return res(result);\n }\n }, { bypassCache: true });\n });\n })];\n }\n });\n });\n };\n /**\n * diable SMS\n * @deprecated\n * @param {CognitoUser} user - the current user\n * @return - A promise resolves is success\n */\n AuthClass.prototype.disableSMS = function (user) {\n return new Promise(function (res, rej) {\n user.disableMFA(function (err, data) {\n if (err) {\n logger.debug('disable mfa failed', err);\n rej(err);\n return;\n }\n logger.debug('disable mfa succeed', data);\n res(data);\n return;\n });\n });\n };\n /**\n * enable SMS\n * @deprecated\n * @param {CognitoUser} user - the current user\n * @return - A promise resolves is success\n */\n AuthClass.prototype.enableSMS = function (user) {\n return new Promise(function (res, rej) {\n user.enableMFA(function (err, data) {\n if (err) {\n logger.debug('enable mfa failed', err);\n rej(err);\n return;\n }\n logger.debug('enable mfa succeed', data);\n res(data);\n return;\n });\n });\n };\n /**\n * Setup TOTP\n * @param {CognitoUser} user - the current user\n * @return - A promise resolves with the secret code if success\n */\n AuthClass.prototype.setupTOTP = function (user) {\n return new Promise(function (res, rej) {\n user.associateSoftwareToken({\n onFailure: function (err) {\n logger.debug('associateSoftwareToken failed', err);\n rej(err);\n return;\n },\n associateSecretCode: function (secretCode) {\n logger.debug('associateSoftwareToken sucess', secretCode);\n res(secretCode);\n return;\n },\n });\n });\n };\n /**\n * verify TOTP setup\n * @param {CognitoUser} user - the current user\n * @param {string} challengeAnswer - challenge answer\n * @return - A promise resolves is success\n */\n AuthClass.prototype.verifyTotpToken = function (user, challengeAnswer) {\n logger.debug('verfication totp token', user, challengeAnswer);\n return new Promise(function (res, rej) {\n user.verifySoftwareToken(challengeAnswer, 'My TOTP device', {\n onFailure: function (err) {\n logger.debug('verifyTotpToken failed', err);\n rej(err);\n return;\n },\n onSuccess: function (data) {\n logger.debug('verifyTotpToken success', data);\n res(data);\n return;\n },\n });\n });\n };\n /**\n * Send MFA code to confirm sign in\n * @param {Object} user - The CognitoUser object\n * @param {String} code - The confirmation code\n */\n AuthClass.prototype.confirmSignIn = function (user, code, mfaType, clientMetadata) {\n var _this = this;\n if (clientMetadata === void 0) { clientMetadata = this._config.clientMetadata; }\n if (!code) {\n return this.rejectAuthError(AuthErrorTypes.EmptyCode);\n }\n var that = this;\n return new Promise(function (resolve, reject) {\n user.sendMFACode(code, {\n onSuccess: function (session) { return __awaiter(_this, void 0, void 0, function () {\n var cred, e_3;\n return __generator(this, function (_a) {\n switch (_a.label) {\n case 0:\n logger.debug(session);\n _a.label = 1;\n case 1:\n _a.trys.push([1, 4, 5, 6]);\n return [4 /*yield*/, Credentials.clear()];\n case 2:\n _a.sent();\n return [4 /*yield*/, Credentials.set(session, 'session')];\n case 3:\n cred = _a.sent();\n logger.debug('succeed to get cognito credentials', cred);\n return [3 /*break*/, 6];\n case 4:\n e_3 = _a.sent();\n logger.debug('cannot get cognito credentials', e_3);\n return [3 /*break*/, 6];\n case 5:\n that.user = user;\n dispatchAuthEvent('signIn', user, user + \" has signed in\");\n resolve(user);\n return [7 /*endfinally*/];\n case 6: return [2 /*return*/];\n }\n });\n }); },\n onFailure: function (err) {\n logger.debug('confirm signIn failure', err);\n reject(err);\n },\n }, mfaType, clientMetadata);\n });\n };\n AuthClass.prototype.completeNewPassword = function (user, password, requiredAttributes, clientMetadata) {\n var _this = this;\n if (clientMetadata === void 0) { clientMetadata = this._config.clientMetadata; }\n if (!password) {\n return this.rejectAuthError(AuthErrorTypes.EmptyPassword);\n }\n var that = this;\n return new Promise(function (resolve, reject) {\n user.completeNewPasswordChallenge(password, requiredAttributes, {\n onSuccess: function (session) { return __awaiter(_this, void 0, void 0, function () {\n var cred, e_4;\n return __generator(this, function (_a) {\n switch (_a.label) {\n case 0:\n logger.debug(session);\n _a.label = 1;\n case 1:\n _a.trys.push([1, 4, 5, 6]);\n return [4 /*yield*/, Credentials.clear()];\n case 2:\n _a.sent();\n return [4 /*yield*/, Credentials.set(session, 'session')];\n case 3:\n cred = _a.sent();\n logger.debug('succeed to get cognito credentials', cred);\n return [3 /*break*/, 6];\n case 4:\n e_4 = _a.sent();\n logger.debug('cannot get cognito credentials', e_4);\n return [3 /*break*/, 6];\n case 5:\n that.user = user;\n dispatchAuthEvent('signIn', user, user + \" has signed in\");\n resolve(user);\n return [7 /*endfinally*/];\n case 6: return [2 /*return*/];\n }\n });\n }); },\n onFailure: function (err) {\n logger.debug('completeNewPassword failure', err);\n dispatchAuthEvent('completeNewPassword_failure', err, _this.user + \" failed to complete the new password flow\");\n reject(err);\n },\n mfaRequired: function (challengeName, challengeParam) {\n logger.debug('signIn MFA required');\n user['challengeName'] = challengeName;\n user['challengeParam'] = challengeParam;\n resolve(user);\n },\n mfaSetup: function (challengeName, challengeParam) {\n logger.debug('signIn mfa setup', challengeName);\n user['challengeName'] = challengeName;\n user['challengeParam'] = challengeParam;\n resolve(user);\n },\n }, clientMetadata);\n });\n };\n /**\n * Send the answer to a custom challenge\n * @param {CognitoUser} user - The CognitoUser object\n * @param {String} challengeResponses - The confirmation code\n */\n AuthClass.prototype.sendCustomChallengeAnswer = function (user, challengeResponses, clientMetadata) {\n var _this = this;\n if (clientMetadata === void 0) { clientMetadata = this._config.clientMetadata; }\n if (!this.userPool) {\n return this.rejectNoUserPool();\n }\n if (!challengeResponses) {\n return this.rejectAuthError(AuthErrorTypes.EmptyChallengeResponse);\n }\n var that = this;\n return new Promise(function (resolve, reject) {\n user.sendCustomChallengeAnswer(challengeResponses, _this.authCallbacks(user, resolve, reject), clientMetadata);\n });\n };\n /**\n * Update an authenticated users' attributes\n * @param {CognitoUser} - The currently logged in user object\n * @return {Promise}\n **/\n AuthClass.prototype.updateUserAttributes = function (user, attributes, clientMetadata) {\n if (clientMetadata === void 0) { clientMetadata = this._config.clientMetadata; }\n var attributeList = [];\n var that = this;\n return new Promise(function (resolve, reject) {\n that.userSession(user).then(function (session) {\n for (var key in attributes) {\n if (key !== 'sub' && key.indexOf('_verified') < 0) {\n var attr = {\n Name: key,\n Value: attributes[key],\n };\n attributeList.push(attr);\n }\n }\n user.updateAttributes(attributeList, function (err, result) {\n if (err) {\n return reject(err);\n }\n else {\n return resolve(result);\n }\n }, clientMetadata);\n });\n });\n };\n /**\n * Return user attributes\n * @param {Object} user - The CognitoUser object\n * @return - A promise resolves to user attributes if success\n */\n AuthClass.prototype.userAttributes = function (user) {\n var _this = this;\n return new Promise(function (resolve, reject) {\n _this.userSession(user).then(function (session) {\n user.getUserAttributes(function (err, attributes) {\n if (err) {\n reject(err);\n }\n else {\n resolve(attributes);\n }\n });\n });\n });\n };\n AuthClass.prototype.verifiedContact = function (user) {\n var that = this;\n return this.userAttributes(user).then(function (attributes) {\n var attrs = that.attributesToObject(attributes);\n var unverified = {};\n var verified = {};\n if (attrs['email']) {\n if (attrs['email_verified']) {\n verified['email'] = attrs['email'];\n }\n else {\n unverified['email'] = attrs['email'];\n }\n }\n if (attrs['phone_number']) {\n if (attrs['phone_number_verified']) {\n verified['phone_number'] = attrs['phone_number'];\n }\n else {\n unverified['phone_number'] = attrs['phone_number'];\n }\n }\n return {\n verified: verified,\n unverified: unverified,\n };\n });\n };\n /**\n * Get current authenticated user\n * @return - A promise resolves to current authenticated CognitoUser if success\n */\n AuthClass.prototype.currentUserPoolUser = function (params) {\n var _this = this;\n if (!this.userPool) {\n return this.rejectNoUserPool();\n }\n var that = this;\n return new Promise(function (res, rej) {\n _this._storageSync\n .then(function () {\n var user = that.userPool.getCurrentUser();\n if (!user) {\n logger.debug('Failed to get user from user pool');\n rej('No current user');\n return;\n }\n // refresh the session if the session expired.\n user.getSession(function (err, session) {\n if (err) {\n logger.debug('Failed to get the user session', err);\n rej(err);\n return;\n }\n // get user data from Cognito\n var bypassCache = params ? params.bypassCache : false;\n // validate the token's scope fisrt before calling this function\n var _a = session.getAccessToken().decodePayload().scope, scope = _a === void 0 ? '' : _a;\n if (scope.split(' ').includes(USER_ADMIN_SCOPE)) {\n user.getUserData(function (err, data) {\n if (err) {\n logger.debug('getting user data failed', err);\n // Make sure the user is still valid\n if (err.message === 'User is disabled' ||\n err.message === 'User does not exist.') {\n rej(err);\n }\n else {\n // the error may also be thrown when lack of permissions to get user info etc\n // in that case we just bypass the error\n res(user);\n }\n return;\n }\n var preferredMFA = data.PreferredMfaSetting || 'NOMFA';\n var attributeList = [];\n for (var i = 0; i < data.UserAttributes.length; i++) {\n var attribute = {\n Name: data.UserAttributes[i].Name,\n Value: data.UserAttributes[i].Value,\n };\n var userAttribute = new CognitoUserAttribute(attribute);\n attributeList.push(userAttribute);\n }\n var attributes = that.attributesToObject(attributeList);\n Object.assign(user, { attributes: attributes, preferredMFA: preferredMFA });\n return res(user);\n }, { bypassCache: bypassCache });\n }\n else {\n logger.debug(\"Unable to get the user data because the \" + USER_ADMIN_SCOPE + \" \" +\n \"is not in the scopes of the access token\");\n return res(user);\n }\n });\n })\n .catch(function (e) {\n logger.debug('Failed to sync cache info into memory', e);\n return rej(e);\n });\n });\n };\n /**\n * Get current authenticated user\n * @param {CurrentUserOpts} - options for getting the current user\n * @return - A promise resolves to current authenticated CognitoUser if success\n */\n AuthClass.prototype.currentAuthenticatedUser = function (params) {\n return __awaiter(this, void 0, void 0, function () {\n var federatedUser, e_5, user, e_6;\n return __generator(this, function (_a) {\n switch (_a.label) {\n case 0:\n logger.debug('getting current authenticated user');\n federatedUser = null;\n _a.label = 1;\n case 1:\n _a.trys.push([1, 3, , 4]);\n return [4 /*yield*/, this._storageSync];\n case 2:\n _a.sent();\n return [3 /*break*/, 4];\n case 3:\n e_5 = _a.sent();\n logger.debug('Failed to sync cache info into memory', e_5);\n throw e_5;\n case 4:\n try {\n federatedUser = JSON.parse(this._storage.getItem('aws-amplify-federatedInfo')).user;\n }\n catch (e) {\n logger.debug('cannot load federated user from auth storage');\n }\n if (!federatedUser) return [3 /*break*/, 5];\n this.user = federatedUser;\n logger.debug('get current authenticated federated user', this.user);\n return [2 /*return*/, this.user];\n case 5:\n logger.debug('get current authenticated userpool user');\n user = null;\n _a.label = 6;\n case 6:\n _a.trys.push([6, 8, , 9]);\n return [4 /*yield*/, this.currentUserPoolUser(params)];\n case 7:\n user = _a.sent();\n return [3 /*break*/, 9];\n case 8:\n e_6 = _a.sent();\n if (e_6 === 'No userPool') {\n logger.error('Cannot get the current user because the user pool is missing. ' +\n 'Please make sure the Auth module is configured with a valid Cognito User Pool ID');\n }\n logger.debug('The user is not authenticated by the error', e_6);\n throw 'not authenticated';\n case 9:\n this.user = user;\n return [2 /*return*/, this.user];\n }\n });\n });\n };\n /**\n * Get current user's session\n * @return - A promise resolves to session object if success\n */\n AuthClass.prototype.currentSession = function () {\n var that = this;\n logger.debug('Getting current session');\n // Purposely not calling the reject method here because we don't need a console error\n if (!this.userPool) {\n return Promise.reject();\n }\n return new Promise(function (res, rej) {\n that\n .currentUserPoolUser()\n .then(function (user) {\n that\n .userSession(user)\n .then(function (session) {\n res(session);\n return;\n })\n .catch(function (e) {\n logger.debug('Failed to get the current session', e);\n rej(e);\n return;\n });\n })\n .catch(function (e) {\n logger.debug('Failed to get the current user', e);\n rej(e);\n return;\n });\n });\n };\n /**\n * Get the corresponding user session\n * @param {Object} user - The CognitoUser object\n * @return - A promise resolves to the session\n */\n AuthClass.prototype.userSession = function (user) {\n if (!user) {\n logger.debug('the user is null');\n return this.rejectAuthError(AuthErrorTypes.NoUserSession);\n }\n return new Promise(function (resolve, reject) {\n logger.debug('Getting the session from this user:', user);\n user.getSession(function (err, session) {\n if (err) {\n logger.debug('Failed to get the session from user', user);\n reject(err);\n return;\n }\n else {\n logger.debug('Succeed to get the user session', session);\n resolve(session);\n return;\n }\n });\n });\n };\n /**\n * Get authenticated credentials of current user.\n * @return - A promise resolves to be current user's credentials\n */\n AuthClass.prototype.currentUserCredentials = function () {\n return __awaiter(this, void 0, void 0, function () {\n var that, e_7, federatedInfo;\n return __generator(this, function (_a) {\n switch (_a.label) {\n case 0:\n that = this;\n logger.debug('Getting current user credentials');\n _a.label = 1;\n case 1:\n _a.trys.push([1, 3, , 4]);\n return [4 /*yield*/, this._storageSync];\n case 2:\n _a.sent();\n return [3 /*break*/, 4];\n case 3:\n e_7 = _a.sent();\n logger.debug('Failed to sync cache info into memory', e_7);\n throw e_7;\n case 4:\n federatedInfo = null;\n try {\n federatedInfo = JSON.parse(this._storage.getItem('aws-amplify-federatedInfo'));\n }\n catch (e) {\n logger.debug('failed to get or parse item aws-amplify-federatedInfo', e);\n }\n if (federatedInfo) {\n // refresh the jwt token here if necessary\n return [2 /*return*/, Credentials.refreshFederatedToken(federatedInfo)];\n }\n else {\n return [2 /*return*/, this.currentSession()\n .then(function (session) {\n logger.debug('getting session success', session);\n return Credentials.set(session, 'session');\n })\n .catch(function (error) {\n logger.debug('getting session failed', error);\n return Credentials.set(null, 'guest');\n })];\n }\n return [2 /*return*/];\n }\n });\n });\n };\n AuthClass.prototype.currentCredentials = function () {\n logger.debug('getting current credntials');\n return Credentials.get();\n };\n /**\n * Initiate an attribute confirmation request\n * @param {Object} user - The CognitoUser\n * @param {Object} attr - The attributes to be verified\n * @return - A promise resolves to callback data if success\n */\n AuthClass.prototype.verifyUserAttribute = function (user, attr, clientMetadata) {\n if (clientMetadata === void 0) { clientMetadata = this._config.clientMetadata; }\n return new Promise(function (resolve, reject) {\n user.getAttributeVerificationCode(attr, {\n onSuccess: function () {\n return resolve();\n },\n onFailure: function (err) {\n return reject(err);\n },\n clientMetadata: clientMetadata,\n });\n });\n };\n /**\n * Confirm an attribute using a confirmation code\n * @param {Object} user - The CognitoUser\n * @param {Object} attr - The attribute to be verified\n * @param {String} code - The confirmation code\n * @return - A promise resolves to callback data if success\n */\n AuthClass.prototype.verifyUserAttributeSubmit = function (user, attr, code) {\n if (!code) {\n return this.rejectAuthError(AuthErrorTypes.EmptyCode);\n }\n return new Promise(function (resolve, reject) {\n user.verifyAttribute(attr, code, {\n onSuccess: function (data) {\n resolve(data);\n return;\n },\n onFailure: function (err) {\n reject(err);\n return;\n },\n });\n });\n };\n AuthClass.prototype.verifyCurrentUserAttribute = function (attr) {\n var that = this;\n return that\n .currentUserPoolUser()\n .then(function (user) { return that.verifyUserAttribute(user, attr); });\n };\n /**\n * Confirm current user's attribute using a confirmation code\n * @param {Object} attr - The attribute to be verified\n * @param {String} code - The confirmation code\n * @return - A promise resolves to callback data if success\n */\n AuthClass.prototype.verifyCurrentUserAttributeSubmit = function (attr, code) {\n var that = this;\n return that\n .currentUserPoolUser()\n .then(function (user) { return that.verifyUserAttributeSubmit(user, attr, code); });\n };\n AuthClass.prototype.cognitoIdentitySignOut = function (opts, user) {\n return __awaiter(this, void 0, void 0, function () {\n var e_8, isSignedInHostedUI;\n var _this = this;\n return __generator(this, function (_a) {\n switch (_a.label) {\n case 0:\n _a.trys.push([0, 2, , 3]);\n return [4 /*yield*/, this._storageSync];\n case 1:\n _a.sent();\n return [3 /*break*/, 3];\n case 2:\n e_8 = _a.sent();\n logger.debug('Failed to sync cache info into memory', e_8);\n throw e_8;\n case 3:\n isSignedInHostedUI = this._oAuthHandler &&\n this._storage.getItem('amplify-signin-with-hostedUI') === 'true';\n return [2 /*return*/, new Promise(function (res, rej) {\n if (opts && opts.global) {\n logger.debug('user global sign out', user);\n // in order to use global signout\n // we must validate the user as an authenticated user by using getSession\n user.getSession(function (err, result) {\n if (err) {\n logger.debug('failed to get the user session', err);\n return rej(err);\n }\n user.globalSignOut({\n onSuccess: function (data) {\n logger.debug('global sign out success');\n if (isSignedInHostedUI) {\n return res(_this._oAuthHandler.signOut());\n }\n else {\n return res();\n }\n },\n onFailure: function (err) {\n logger.debug('global sign out failed', err);\n return rej(err);\n },\n });\n });\n }\n else {\n logger.debug('user sign out', user);\n user.signOut();\n if (isSignedInHostedUI) {\n return res(_this._oAuthHandler.signOut());\n }\n else {\n return res();\n }\n }\n })];\n }\n });\n });\n };\n /**\n * Sign out method\n * @\n * @return - A promise resolved if success\n */\n AuthClass.prototype.signOut = function (opts) {\n return __awaiter(this, void 0, void 0, function () {\n var e_9, user;\n return __generator(this, function (_a) {\n switch (_a.label) {\n case 0:\n _a.trys.push([0, 2, , 3]);\n return [4 /*yield*/, this.cleanCachedItems()];\n case 1:\n _a.sent();\n return [3 /*break*/, 3];\n case 2:\n e_9 = _a.sent();\n logger.debug('failed to clear cached items');\n return [3 /*break*/, 3];\n case 3:\n if (!this.userPool) return [3 /*break*/, 7];\n user = this.userPool.getCurrentUser();\n if (!user) return [3 /*break*/, 5];\n return [4 /*yield*/, this.cognitoIdentitySignOut(opts, user)];\n case 4:\n _a.sent();\n return [3 /*break*/, 6];\n case 5:\n logger.debug('no current Cognito user');\n _a.label = 6;\n case 6: return [3 /*break*/, 8];\n case 7:\n logger.debug('no Congito User pool');\n _a.label = 8;\n case 8:\n /**\n * Note for future refactor - no reliable way to get username with\n * Cognito User Pools vs Identity when federating with Social Providers\n * This is why we need a well structured session object that can be inspected\n * and information passed back in the message below for Hub dispatch\n */\n dispatchAuthEvent('signOut', this.user, \"A user has been signed out\");\n this.user = null;\n return [2 /*return*/];\n }\n });\n });\n };\n AuthClass.prototype.cleanCachedItems = function () {\n return __awaiter(this, void 0, void 0, function () {\n return __generator(this, function (_a) {\n switch (_a.label) {\n case 0: \n // clear cognito cached item\n return [4 /*yield*/, Credentials.clear()];\n case 1:\n // clear cognito cached item\n _a.sent();\n return [2 /*return*/];\n }\n });\n });\n };\n /**\n * Change a password for an authenticated user\n * @param {Object} user - The CognitoUser object\n * @param {String} oldPassword - the current password\n * @param {String} newPassword - the requested new password\n * @return - A promise resolves if success\n */\n AuthClass.prototype.changePassword = function (user, oldPassword, newPassword, clientMetadata) {\n var _this = this;\n if (clientMetadata === void 0) { clientMetadata = this._config.clientMetadata; }\n return new Promise(function (resolve, reject) {\n _this.userSession(user).then(function (session) {\n user.changePassword(oldPassword, newPassword, function (err, data) {\n if (err) {\n logger.debug('change password failure', err);\n return reject(err);\n }\n else {\n return resolve(data);\n }\n }, clientMetadata);\n });\n });\n };\n /**\n * Initiate a forgot password request\n * @param {String} username - the username to change password\n * @return - A promise resolves if success\n */\n AuthClass.prototype.forgotPassword = function (username, clientMetadata) {\n if (clientMetadata === void 0) { clientMetadata = this._config.clientMetadata; }\n if (!this.userPool) {\n return this.rejectNoUserPool();\n }\n if (!username) {\n return this.rejectAuthError(AuthErrorTypes.EmptyUsername);\n }\n var user = this.createCognitoUser(username);\n return new Promise(function (resolve, reject) {\n user.forgotPassword({\n onSuccess: function () {\n resolve();\n return;\n },\n onFailure: function (err) {\n logger.debug('forgot password failure', err);\n dispatchAuthEvent('forgotPassword_failure', err, username + \" forgotPassword failed\");\n reject(err);\n return;\n },\n inputVerificationCode: function (data) {\n dispatchAuthEvent('forgotPassword', user, username + \" has initiated forgot password flow\");\n resolve(data);\n return;\n },\n }, clientMetadata);\n });\n };\n /**\n * Confirm a new password using a confirmation Code\n * @param {String} username - The username\n * @param {String} code - The confirmation code\n * @param {String} password - The new password\n * @return - A promise that resolves if success\n */\n AuthClass.prototype.forgotPasswordSubmit = function (username, code, password, clientMetadata) {\n if (clientMetadata === void 0) { clientMetadata = this._config.clientMetadata; }\n if (!this.userPool) {\n return this.rejectNoUserPool();\n }\n if (!username) {\n return this.rejectAuthError(AuthErrorTypes.EmptyUsername);\n }\n if (!code) {\n return this.rejectAuthError(AuthErrorTypes.EmptyCode);\n }\n if (!password) {\n return this.rejectAuthError(AuthErrorTypes.EmptyPassword);\n }\n var user = this.createCognitoUser(username);\n return new Promise(function (resolve, reject) {\n user.confirmPassword(code, password, {\n onSuccess: function () {\n dispatchAuthEvent('forgotPasswordSubmit', user, username + \" forgotPasswordSubmit successful\");\n resolve();\n return;\n },\n onFailure: function (err) {\n dispatchAuthEvent('forgotPasswordSubmit_failure', err, username + \" forgotPasswordSubmit failed\");\n reject(err);\n return;\n },\n }, clientMetadata);\n });\n };\n /**\n * Get user information\n * @async\n * @return {Object }- current User's information\n */\n AuthClass.prototype.currentUserInfo = function () {\n return __awaiter(this, void 0, void 0, function () {\n var source, user, attributes, userAttrs, credentials, e_10, info, err_1, user;\n return __generator(this, function (_a) {\n switch (_a.label) {\n case 0:\n source = Credentials.getCredSource();\n if (!(!source || source === 'aws' || source === 'userPool')) return [3 /*break*/, 9];\n return [4 /*yield*/, this.currentUserPoolUser().catch(function (err) {\n return logger.debug(err);\n })];\n case 1:\n user = _a.sent();\n if (!user) {\n return [2 /*return*/, null];\n }\n _a.label = 2;\n case 2:\n _a.trys.push([2, 8, , 9]);\n return [4 /*yield*/, this.userAttributes(user)];\n case 3:\n attributes = _a.sent();\n userAttrs = this.attributesToObject(attributes);\n credentials = null;\n _a.label = 4;\n case 4:\n _a.trys.push([4, 6, , 7]);\n return [4 /*yield*/, this.currentCredentials()];\n case 5:\n credentials = _a.sent();\n return [3 /*break*/, 7];\n case 6:\n e_10 = _a.sent();\n logger.debug('Failed to retrieve credentials while getting current user info', e_10);\n return [3 /*break*/, 7];\n case 7:\n info = {\n id: credentials ? credentials.identityId : undefined,\n username: user.getUsername(),\n attributes: userAttrs,\n };\n return [2 /*return*/, info];\n case 8:\n err_1 = _a.sent();\n logger.debug('currentUserInfo error', err_1);\n return [2 /*return*/, {}];\n case 9:\n if (source === 'federated') {\n user = this.user;\n return [2 /*return*/, user ? user : {}];\n }\n return [2 /*return*/];\n }\n });\n });\n };\n AuthClass.prototype.federatedSignIn = function (providerOrOptions, response, user) {\n return __awaiter(this, void 0, void 0, function () {\n var options, provider, customState, client_id, redirect_uri, provider, loggedInUser, token, identity_id, expires_at, credentials, currentUser;\n return __generator(this, function (_a) {\n switch (_a.label) {\n case 0:\n if (!this._config.identityPoolId && !this._config.userPoolId) {\n throw new Error(\"Federation requires either a User Pool or Identity Pool in config\");\n }\n // Ensure backwards compatability\n if (typeof providerOrOptions === 'undefined') {\n if (this._config.identityPoolId && !this._config.userPoolId) {\n throw new Error(\"Federation with Identity Pools requires tokens passed as arguments\");\n }\n }\n if (!(isFederatedSignInOptions(providerOrOptions) ||\n isFederatedSignInOptionsCustom(providerOrOptions) ||\n typeof providerOrOptions === 'undefined')) return [3 /*break*/, 1];\n options = providerOrOptions || {\n provider: CognitoHostedUIIdentityProvider.Cognito,\n };\n provider = isFederatedSignInOptions(options)\n ? options.provider\n : options.customProvider;\n customState = isFederatedSignInOptions(options)\n ? options.customState\n : options.customState;\n if (this._config.userPoolId) {\n client_id = isCognitoHostedOpts(this._config.oauth)\n ? this._config.userPoolWebClientId\n : this._config.oauth.clientID;\n redirect_uri = isCognitoHostedOpts(this._config.oauth)\n ? this._config.oauth.redirectSignIn\n : this._config.oauth.redirectUri;\n this._oAuthHandler.oauthSignIn(this._config.oauth.responseType, this._config.oauth.domain, redirect_uri, client_id, provider, customState);\n }\n return [3 /*break*/, 4];\n case 1:\n provider = providerOrOptions;\n // To check if the user is already logged in\n try {\n loggedInUser = JSON.stringify(JSON.parse(this._storage.getItem('aws-amplify-federatedInfo')).user);\n if (loggedInUser) {\n logger.warn(\"There is already a signed in user: \" + loggedInUser + \" in your app.\\n\\t\\t\\t\\t\\t\\t\\t\\t\\t\\t\\t\\t\\t\\t\\t\\t\\tYou should not call Auth.federatedSignIn method again as it may cause unexpected behavior.\");\n }\n }\n catch (e) { }\n token = response.token, identity_id = response.identity_id, expires_at = response.expires_at;\n return [4 /*yield*/, Credentials.set({ provider: provider, token: token, identity_id: identity_id, user: user, expires_at: expires_at }, 'federation')];\n case 2:\n credentials = _a.sent();\n return [4 /*yield*/, this.currentAuthenticatedUser()];\n case 3:\n currentUser = _a.sent();\n dispatchAuthEvent('signIn', currentUser, \"A user \" + currentUser.username + \" has been signed in\");\n logger.debug('federated sign in credentials', credentials);\n return [2 /*return*/, credentials];\n case 4: return [2 /*return*/];\n }\n });\n });\n };\n /**\n * Used to complete the OAuth flow with or without the Cognito Hosted UI\n * @param {String} URL - optional parameter for customers to pass in the response URL\n */\n AuthClass.prototype._handleAuthResponse = function (URL) {\n return __awaiter(this, void 0, void 0, function () {\n var currentUrl, hasCodeOrError, hasTokenOrError, _a, accessToken, idToken, refreshToken, state, session, credentials, isCustomStateIncluded, currentUser, _b, customState, err_2;\n return __generator(this, function (_c) {\n switch (_c.label) {\n case 0:\n if (!this._config.userPoolId) {\n throw new Error(\"OAuth responses require a User Pool defined in config\");\n }\n dispatchAuthEvent('parsingCallbackUrl', { url: URL }, \"The callback url is being parsed\");\n currentUrl = URL || (JS.browserOrNode().isBrowser ? window.location.href : '');\n hasCodeOrError = !!(parse(currentUrl).query || '')\n .split('&')\n .map(function (entry) { return entry.split('='); })\n .find(function (_a) {\n var k = _a[0];\n return k === 'code' || k === 'error';\n });\n hasTokenOrError = !!(parse(currentUrl).hash || '#')\n .substr(1)\n .split('&')\n .map(function (entry) { return entry.split('='); })\n .find(function (_a) {\n var k = _a[0];\n return k === 'access_token' || k === 'error';\n });\n if (!(hasCodeOrError || hasTokenOrError)) return [3 /*break*/, 6];\n _c.label = 1;\n case 1:\n _c.trys.push([1, 5, , 6]);\n return [4 /*yield*/, this._oAuthHandler.handleAuthResponse(currentUrl)];\n case 2:\n _a = _c.sent(), accessToken = _a.accessToken, idToken = _a.idToken, refreshToken = _a.refreshToken, state = _a.state;\n session = new CognitoUserSession({\n IdToken: new CognitoIdToken({ IdToken: idToken }),\n RefreshToken: new CognitoRefreshToken({ RefreshToken: refreshToken }),\n AccessToken: new CognitoAccessToken({ AccessToken: accessToken }),\n });\n credentials = void 0;\n if (!this._config.identityPoolId) return [3 /*break*/, 4];\n return [4 /*yield*/, Credentials.set(session, 'session')];\n case 3:\n credentials = _c.sent();\n logger.debug('AWS credentials', credentials);\n _c.label = 4;\n case 4:\n isCustomStateIncluded = /-/.test(state);\n currentUser = this.createCognitoUser(session.getIdToken().decodePayload()['cognito:username']);\n dispatchAuthEvent('signIn', currentUser, \"A user \" + currentUser.getUsername() + \" has been signed in\");\n dispatchAuthEvent('cognitoHostedUI', currentUser, \"A user \" + currentUser.getUsername() + \" has been signed in via Cognito Hosted UI\");\n if (isCustomStateIncluded) {\n _b = state.split('-'), customState = _b[1];\n dispatchAuthEvent('customOAuthState', customState, \"State for user \" + currentUser.getUsername());\n }\n // This calls cacheTokens() in Cognito SDK\n currentUser.setSignInUserSession(session);\n //#endregion\n if (window && typeof window.history !== 'undefined') {\n window.history.replaceState({}, null, this._config.oauth.redirectSignIn);\n }\n return [2 /*return*/, credentials];\n case 5:\n err_2 = _c.sent();\n logger.debug('Error in cognito hosted auth response', err_2);\n dispatchAuthEvent('signIn_failure', err_2, \"The OAuth response flow failed\");\n dispatchAuthEvent('cognitoHostedUI_failure', err_2, \"A failure occurred when returning to the Cognito Hosted UI\");\n dispatchAuthEvent('customState_failure', err_2, \"A failure occurred when returning state\");\n throw err_2;\n case 6: return [2 /*return*/];\n }\n });\n });\n };\n /**\n * Compact version of credentials\n * @param {Object} credentials\n * @return {Object} - Credentials\n */\n AuthClass.prototype.essentialCredentials = function (credentials) {\n return {\n accessKeyId: credentials.accessKeyId,\n sessionToken: credentials.sessionToken,\n secretAccessKey: credentials.secretAccessKey,\n identityId: credentials.identityId,\n authenticated: credentials.authenticated,\n };\n };\n AuthClass.prototype.attributesToObject = function (attributes) {\n var obj = {};\n if (attributes) {\n attributes.map(function (attribute) {\n if (attribute.Value === 'true') {\n obj[attribute.Name] = true;\n }\n else if (attribute.Value === 'false') {\n obj[attribute.Name] = false;\n }\n else {\n obj[attribute.Name] = attribute.Value;\n }\n });\n }\n return obj;\n };\n AuthClass.prototype.createCognitoUser = function (username) {\n var userData = {\n Username: username,\n Pool: this.userPool,\n };\n userData.Storage = this._storage;\n var authenticationFlowType = this._config.authenticationFlowType;\n var user = new CognitoUser(userData);\n if (authenticationFlowType) {\n user.setAuthenticationFlowType(authenticationFlowType);\n }\n return user;\n };\n AuthClass.prototype._isValidAuthStorage = function (obj) {\n // We need to check if the obj has the functions of Storage\n return (!!obj &&\n typeof obj.getItem === 'function' &&\n typeof obj.setItem === 'function' &&\n typeof obj.removeItem === 'function' &&\n typeof obj.clear === 'function');\n };\n AuthClass.prototype.noUserPoolErrorHandler = function (config) {\n if (config) {\n if (!config.userPoolId || !config.identityPoolId) {\n return AuthErrorTypes.MissingAuthConfig;\n }\n }\n return AuthErrorTypes.NoConfig;\n };\n AuthClass.prototype.rejectAuthError = function (type) {\n return Promise.reject(new AuthError(type));\n };\n AuthClass.prototype.rejectNoUserPool = function () {\n var type = this.noUserPoolErrorHandler(this._config);\n return Promise.reject(new NoUserPoolError(type));\n };\n return AuthClass;\n}());\nexport default AuthClass;\n//# sourceMappingURL=Auth.js.map","/*\n * Copyright 2017-2017 Amazon.com, Inc. or its affiliates. All Rights Reserved.\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\"). You may not use this file except in compliance with\n * the License. A copy of the License is located at\n *\n * http://aws.amazon.com/apache2.0/\n *\n * or in the \"license\" file accompanying this file. This file is distributed on an \"AS IS\" BASIS, WITHOUT WARRANTIES OR\n * CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions\n * and limitations under the License.\n */\nvar SELF = '_self';\nexport var launchUri = function (url) {\n var windowProxy = window.open(url, SELF);\n if (windowProxy) {\n return Promise.resolve(windowProxy);\n }\n else {\n return Promise.reject();\n }\n};\n//# sourceMappingURL=urlOpener.js.map","/*\n * Copyright 2017-2017 Amazon.com, Inc. or its affiliates. All Rights Reserved.\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\"). You may not use this file except in compliance with\n * the License. A copy of the License is located at\n *\n * http://aws.amazon.com/apache2.0/\n *\n * or in the \"license\" file accompanying this file. This file is distributed on an \"AS IS\" BASIS, WITHOUT WARRANTIES OR\n * CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions\n * and limitations under the License.\n */\nvar __assign = (this && this.__assign) || function () {\n __assign = Object.assign || function(t) {\n for (var s, i = 1, n = arguments.length; i < n; i++) {\n s = arguments[i];\n for (var p in s) if (Object.prototype.hasOwnProperty.call(s, p))\n t[p] = s[p];\n }\n return t;\n };\n return __assign.apply(this, arguments);\n};\nvar __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, generator) {\n function adopt(value) { return value instanceof P ? value : new P(function (resolve) { resolve(value); }); }\n return new (P || (P = Promise))(function (resolve, reject) {\n function fulfilled(value) { try { step(generator.next(value)); } catch (e) { reject(e); } }\n function rejected(value) { try { step(generator[\"throw\"](value)); } catch (e) { reject(e); } }\n function step(result) { result.done ? resolve(result.value) : adopt(result.value).then(fulfilled, rejected); }\n step((generator = generator.apply(thisArg, _arguments || [])).next());\n });\n};\nvar __generator = (this && this.__generator) || function (thisArg, body) {\n var _ = { label: 0, sent: function() { if (t[0] & 1) throw t[1]; return t[1]; }, trys: [], ops: [] }, f, y, t, g;\n return g = { next: verb(0), \"throw\": verb(1), \"return\": verb(2) }, typeof Symbol === \"function\" && (g[Symbol.iterator] = function() { return this; }), g;\n function verb(n) { return function (v) { return step([n, v]); }; }\n function step(op) {\n if (f) throw new TypeError(\"Generator is already executing.\");\n while (_) try {\n if (f = 1, y && (t = op[0] & 2 ? y[\"return\"] : op[0] ? y[\"throw\"] || ((t = y[\"return\"]) && t.call(y), 0) : y.next) && !(t = t.call(y, op[1])).done) return t;\n if (y = 0, t) op = [op[0] & 2, t.value];\n switch (op[0]) {\n case 0: case 1: t = op; break;\n case 4: _.label++; return { value: op[1], done: false };\n case 5: _.label++; y = op[1]; op = [0]; continue;\n case 7: op = _.ops.pop(); _.trys.pop(); continue;\n default:\n if (!(t = _.trys, t = t.length > 0 && t[t.length - 1]) && (op[0] === 6 || op[0] === 2)) { _ = 0; continue; }\n if (op[0] === 3 && (!t || (op[1] > t[0] && op[1] < t[3]))) { _.label = op[1]; break; }\n if (op[0] === 6 && _.label < t[1]) { _.label = t[1]; t = op; break; }\n if (t && _.label < t[2]) { _.label = t[2]; _.ops.push(op); break; }\n if (t[2]) _.ops.pop();\n _.trys.pop(); continue;\n }\n op = body.call(thisArg, _);\n } catch (e) { op = [6, e]; y = 0; } finally { f = t = 0; }\n if (op[0] & 5) throw op[1]; return { value: op[0] ? op[1] : void 0, done: true };\n }\n};\nimport { parse } from 'url'; // Used for OAuth parsing of Cognito Hosted UI\nimport { launchUri } from './urlOpener';\nimport * as oAuthStorage from './oauthStorage';\nimport { isCognitoHostedOpts, CognitoHostedUIIdentityProvider, } from '../types/Auth';\nimport { ConsoleLogger as Logger, Hub } from '@aws-amplify/core';\nvar SHA256 = require('crypto-js/sha256');\nvar Base64 = require('crypto-js/enc-base64');\nvar AMPLIFY_SYMBOL = (typeof Symbol !== 'undefined' &&\n typeof Symbol.for === 'function'\n ? Symbol.for('amplify_default')\n : '@@amplify_default');\nvar dispatchAuthEvent = function (event, data, message) {\n Hub.dispatch('auth', { event: event, data: data, message: message }, 'Auth', AMPLIFY_SYMBOL);\n};\nvar logger = new Logger('OAuth');\nvar OAuth = /** @class */ (function () {\n function OAuth(_a) {\n var config = _a.config, cognitoClientId = _a.cognitoClientId, _b = _a.scopes, scopes = _b === void 0 ? [] : _b;\n this._urlOpener = config.urlOpener || launchUri;\n this._config = config;\n this._cognitoClientId = cognitoClientId;\n this._scopes = scopes;\n }\n OAuth.prototype.oauthSignIn = function (responseType, domain, redirectSignIn, clientId, provider, customState) {\n if (responseType === void 0) { responseType = 'code'; }\n if (provider === void 0) { provider = CognitoHostedUIIdentityProvider.Cognito; }\n var generatedState = this._generateState(32);\n var state = customState\n ? generatedState + \"-\" + customState\n : generatedState;\n oAuthStorage.setState(encodeURIComponent(state));\n var pkce_key = this._generateRandom(128);\n oAuthStorage.setPKCE(pkce_key);\n var code_challenge = this._generateChallenge(pkce_key);\n var code_challenge_method = 'S256';\n var queryString = Object.entries(__assign(__assign({ redirect_uri: redirectSignIn, response_type: responseType, client_id: clientId, identity_provider: provider, scopes: this._scopes, state: state }, (responseType === 'code' ? { code_challenge: code_challenge } : {})), (responseType === 'code' ? { code_challenge_method: code_challenge_method } : {})))\n .map(function (_a) {\n var k = _a[0], v = _a[1];\n return encodeURIComponent(k) + \"=\" + encodeURIComponent(v);\n })\n .join('&');\n var URL = \"https://\" + domain + \"/oauth2/authorize?\" + queryString;\n logger.debug(\"Redirecting to \" + URL);\n this._urlOpener(URL, redirectSignIn);\n };\n OAuth.prototype._handleCodeFlow = function (currentUrl) {\n return __awaiter(this, void 0, void 0, function () {\n var code, oAuthTokenEndpoint, client_id, redirect_uri, code_verifier, oAuthTokenBody, body, _a, access_token, refresh_token, id_token, error;\n return __generator(this, function (_b) {\n switch (_b.label) {\n case 0:\n code = (parse(currentUrl).query || '')\n .split('&')\n .map(function (pairings) { return pairings.split('='); })\n .reduce(function (accum, _a) {\n var _b;\n var k = _a[0], v = _a[1];\n return (__assign(__assign({}, accum), (_b = {}, _b[k] = v, _b)));\n }, { code: undefined }).code;\n if (!code) {\n return [2 /*return*/];\n }\n oAuthTokenEndpoint = 'https://' + this._config.domain + '/oauth2/token';\n dispatchAuthEvent('codeFlow', {}, \"Retrieving tokens from \" + oAuthTokenEndpoint);\n client_id = isCognitoHostedOpts(this._config)\n ? this._cognitoClientId\n : this._config.clientID;\n redirect_uri = isCognitoHostedOpts(this._config)\n ? this._config.redirectSignIn\n : this._config.redirectUri;\n code_verifier = oAuthStorage.getPKCE();\n oAuthTokenBody = __assign({ grant_type: 'authorization_code', code: code,\n client_id: client_id,\n redirect_uri: redirect_uri }, (code_verifier ? { code_verifier: code_verifier } : {}));\n logger.debug(\"Calling token endpoint: \" + oAuthTokenEndpoint + \" with\", oAuthTokenBody);\n body = Object.entries(oAuthTokenBody)\n .map(function (_a) {\n var k = _a[0], v = _a[1];\n return encodeURIComponent(k) + \"=\" + encodeURIComponent(v);\n })\n .join('&');\n return [4 /*yield*/, fetch(oAuthTokenEndpoint, {\n method: 'POST',\n headers: {\n 'Content-Type': 'application/x-www-form-urlencoded',\n },\n body: body,\n })];\n case 1: return [4 /*yield*/, (_b.sent()).json()];\n case 2:\n _a = _b.sent(), access_token = _a.access_token, refresh_token = _a.refresh_token, id_token = _a.id_token, error = _a.error;\n if (error) {\n throw new Error(error);\n }\n return [2 /*return*/, {\n accessToken: access_token,\n refreshToken: refresh_token,\n idToken: id_token,\n }];\n }\n });\n });\n };\n OAuth.prototype._handleImplicitFlow = function (currentUrl) {\n return __awaiter(this, void 0, void 0, function () {\n var _a, id_token, access_token;\n return __generator(this, function (_b) {\n _a = parse(currentUrl)\n .hash.substr(1) // Remove # from returned code\n .split('&')\n .map(function (pairings) { return pairings.split('='); })\n .reduce(function (accum, _a) {\n var _b;\n var k = _a[0], v = _a[1];\n return (__assign(__assign({}, accum), (_b = {}, _b[k] = v, _b)));\n }, {\n id_token: undefined,\n access_token: undefined,\n }), id_token = _a.id_token, access_token = _a.access_token;\n dispatchAuthEvent('implicitFlow', {}, \"Got tokens from \" + currentUrl);\n logger.debug(\"Retrieving implicit tokens from \" + currentUrl + \" with\");\n return [2 /*return*/, {\n accessToken: access_token,\n idToken: id_token,\n refreshToken: null,\n }];\n });\n });\n };\n OAuth.prototype.handleAuthResponse = function (currentUrl) {\n return __awaiter(this, void 0, void 0, function () {\n var urlParams, error, error_description, state, _a, _b, e_1;\n return __generator(this, function (_c) {\n switch (_c.label) {\n case 0:\n _c.trys.push([0, 5, , 6]);\n urlParams = currentUrl\n ? __assign(__assign({}, (parse(currentUrl).hash || '#')\n .substr(1)\n .split('&')\n .map(function (entry) { return entry.split('='); })\n .reduce(function (acc, _a) {\n var k = _a[0], v = _a[1];\n return ((acc[k] = v), acc);\n }, {})), (parse(currentUrl).query || '')\n .split('&')\n .map(function (entry) { return entry.split('='); })\n .reduce(function (acc, _a) {\n var k = _a[0], v = _a[1];\n return ((acc[k] = v), acc);\n }, {}))\n : {};\n error = urlParams.error, error_description = urlParams.error_description;\n if (error) {\n throw new Error(error_description);\n }\n state = this._validateState(urlParams);\n logger.debug(\"Starting \" + this._config.responseType + \" flow with \" + currentUrl);\n if (!(this._config.responseType === 'code')) return [3 /*break*/, 2];\n _a = [{}];\n return [4 /*yield*/, this._handleCodeFlow(currentUrl)];\n case 1: return [2 /*return*/, __assign.apply(void 0, [__assign.apply(void 0, _a.concat([(_c.sent())])), { state: state }])];\n case 2:\n _b = [{}];\n return [4 /*yield*/, this._handleImplicitFlow(currentUrl)];\n case 3: return [2 /*return*/, __assign.apply(void 0, [__assign.apply(void 0, _b.concat([(_c.sent())])), { state: state }])];\n case 4: return [3 /*break*/, 6];\n case 5:\n e_1 = _c.sent();\n logger.error(\"Error handling auth response.\", e_1);\n return [3 /*break*/, 6];\n case 6: return [2 /*return*/];\n }\n });\n });\n };\n OAuth.prototype._validateState = function (urlParams) {\n if (!urlParams) {\n return;\n }\n var savedState = oAuthStorage.getState();\n var returnedState = urlParams.state;\n // This is because savedState only exists if the flow was initiated by Amplify\n if (savedState && savedState !== returnedState) {\n throw new Error('Invalid state in OAuth flow');\n }\n return returnedState;\n };\n OAuth.prototype.signOut = function () {\n return __awaiter(this, void 0, void 0, function () {\n var oAuthLogoutEndpoint, client_id, signout_uri;\n return __generator(this, function (_a) {\n oAuthLogoutEndpoint = 'https://' + this._config.domain + '/logout?';\n client_id = isCognitoHostedOpts(this._config)\n ? this._cognitoClientId\n : this._config.oauth.clientID;\n signout_uri = isCognitoHostedOpts(this._config)\n ? this._config.redirectSignOut\n : this._config.returnTo;\n oAuthLogoutEndpoint += Object.entries({\n client_id: client_id,\n logout_uri: encodeURIComponent(signout_uri),\n })\n .map(function (_a) {\n var k = _a[0], v = _a[1];\n return k + \"=\" + v;\n })\n .join('&');\n dispatchAuthEvent('oAuthSignOut', { oAuth: 'signOut' }, \"Signing out from \" + oAuthLogoutEndpoint);\n logger.debug(\"Signing out from \" + oAuthLogoutEndpoint);\n return [2 /*return*/, this._urlOpener(oAuthLogoutEndpoint)];\n });\n });\n };\n OAuth.prototype._generateState = function (length) {\n var result = '';\n var i = length;\n var chars = '0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ';\n for (; i > 0; --i)\n result += chars[Math.round(Math.random() * (chars.length - 1))];\n return result;\n };\n OAuth.prototype._generateChallenge = function (code) {\n return this._base64URL(SHA256(code));\n };\n OAuth.prototype._base64URL = function (string) {\n return string\n .toString(Base64)\n .replace(/=/g, '')\n .replace(/\\+/g, '-')\n .replace(/\\//g, '_');\n };\n OAuth.prototype._generateRandom = function (size) {\n var CHARSET = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789-._~';\n var buffer = new Uint8Array(size);\n if (typeof window !== 'undefined' && !!window.crypto) {\n window.crypto.getRandomValues(buffer);\n }\n else {\n for (var i = 0; i < size; i += 1) {\n buffer[i] = (Math.random() * CHARSET.length) | 0;\n }\n }\n return this._bufferToString(buffer);\n };\n OAuth.prototype._bufferToString = function (buffer) {\n var CHARSET = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789';\n var state = [];\n for (var i = 0; i < buffer.byteLength; i += 1) {\n var index = buffer[i] % CHARSET.length;\n state.push(CHARSET[index]);\n }\n return state.join('');\n };\n return OAuth;\n}());\nexport default OAuth;\n//# sourceMappingURL=OAuth.js.map","/*\n * Copyright 2017-2017 Amazon.com, Inc. or its affiliates. All Rights Reserved.\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\"). You may not use this file except in compliance with\n * the License. A copy of the License is located at\n *\n * http://aws.amazon.com/apache2.0/\n *\n * or in the \"license\" file accompanying this file. This file is distributed on an \"AS IS\" BASIS, WITHOUT WARRANTIES OR\n * CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions\n * and limitations under the License.\n */\nexport var setState = function (state) {\n window.sessionStorage.setItem('oauth_state', state);\n};\nexport var getState = function () {\n var oauth_state = window.sessionStorage.getItem('oauth_state');\n window.sessionStorage.removeItem('oauth_state');\n return oauth_state;\n};\nexport var setPKCE = function (private_key) {\n window.sessionStorage.setItem('ouath_pkce_key', private_key);\n};\nexport var getPKCE = function () {\n var ouath_pkce_key = window.sessionStorage.getItem('ouath_pkce_key');\n window.sessionStorage.removeItem('ouath_pkce_key');\n return ouath_pkce_key;\n};\nexport var clearAll = function () {\n window.sessionStorage.removeItem('ouath_pkce_key');\n window.sessionStorage.removeItem('oauth_state');\n};\n//# sourceMappingURL=oauthStorage.js.map","/*\n * Copyright 2017-2018 Amazon.com, Inc. or its affiliates. All Rights Reserved.\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\"). You may not use this file except in compliance with\n * the License. A copy of the License is located at\n *\n * http://aws.amazon.com/apache2.0/\n *\n * or in the \"license\" file accompanying this file. This file is distributed on an \"AS IS\" BASIS, WITHOUT WARRANTIES OR\n * CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions\n * and limitations under the License.\n */\nvar __extends = (this && this.__extends) || (function () {\n var extendStatics = function (d, b) {\n extendStatics = Object.setPrototypeOf ||\n ({ __proto__: [] } instanceof Array && function (d, b) { d.__proto__ = b; }) ||\n function (d, b) { for (var p in b) if (b.hasOwnProperty(p)) d[p] = b[p]; };\n return extendStatics(d, b);\n };\n return function (d, b) {\n extendStatics(d, b);\n function __() { this.constructor = d; }\n d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());\n };\n})();\nvar XRError = /** @class */ (function (_super) {\n __extends(XRError, _super);\n function XRError() {\n return _super !== null && _super.apply(this, arguments) || this;\n }\n return XRError;\n}(Error));\nexport { XRError };\nvar XRNoSceneConfiguredError = /** @class */ (function (_super) {\n __extends(XRNoSceneConfiguredError, _super);\n function XRNoSceneConfiguredError() {\n return _super !== null && _super.apply(this, arguments) || this;\n }\n return XRNoSceneConfiguredError;\n}(XRError));\nexport { XRNoSceneConfiguredError };\nvar XRSceneNotFoundError = /** @class */ (function (_super) {\n __extends(XRSceneNotFoundError, _super);\n function XRSceneNotFoundError() {\n return _super !== null && _super.apply(this, arguments) || this;\n }\n return XRSceneNotFoundError;\n}(XRError));\nexport { XRSceneNotFoundError };\nvar XRSceneNotLoadedError = /** @class */ (function (_super) {\n __extends(XRSceneNotLoadedError, _super);\n function XRSceneNotLoadedError() {\n return _super !== null && _super.apply(this, arguments) || this;\n }\n return XRSceneNotLoadedError;\n}(XRError));\nexport { XRSceneNotLoadedError };\nvar XRNoDomElement = /** @class */ (function (_super) {\n __extends(XRNoDomElement, _super);\n function XRNoDomElement() {\n return _super !== null && _super.apply(this, arguments) || this;\n }\n return XRNoDomElement;\n}(XRError));\nexport { XRNoDomElement };\nvar XRSceneLoadFailure = /** @class */ (function (_super) {\n __extends(XRSceneLoadFailure, _super);\n function XRSceneLoadFailure() {\n return _super !== null && _super.apply(this, arguments) || this;\n }\n return XRSceneLoadFailure;\n}(XRError));\nexport { XRSceneLoadFailure };\nvar XRProviderNotConfigured = /** @class */ (function (_super) {\n __extends(XRProviderNotConfigured, _super);\n function XRProviderNotConfigured() {\n return _super !== null && _super.apply(this, arguments) || this;\n }\n return XRProviderNotConfigured;\n}(XRError));\nexport { XRProviderNotConfigured };\n//# sourceMappingURL=Errors.js.map","/*\n * Copyright 2017-2019 Amazon.com, Inc. or its affiliates. All Rights Reserved.\n *\n * Licensed under the Apache License, Version 2.0 (the \"License\"). You may not use this file except in compliance with\n * the License. A copy of the License is located at\n *\n * http://aws.amazon.com/apache2.0/\n *\n * or in the \"license\" file accompanying this file. This file is distributed on an \"AS IS\" BASIS, WITHOUT WARRANTIES OR\n * CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions\n * and limitations under the License.\n */\nimport { JS } from '@aws-amplify/core';\nexport default (function (callback) {\n if (JS.browserOrNode().isBrowser && window.location) {\n var url = window.location.href;\n callback({ url: url });\n }\n else if (JS.browserOrNode().isNode) {\n // continue building on ssr\n (function () { }); // noop\n }\n else {\n throw new Error('Not supported');\n }\n});\n//# sourceMappingURL=urlListener.js.map","/* eslint-disable no-use-before-define */\n\n/**\n * Returns a number whose value is limited to the given range.\n *\n * @param {number} value The value to be clamped\n * @param {number} min The lower boundary of the output range\n * @param {number} max The upper boundary of the output range\n * @returns {number} A number in the range [min, max]\n */\nfunction clamp(value) {\n var min = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : 0;\n var max = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : 1;\n\n if (process.env.NODE_ENV !== 'production') {\n if (value < min || value > max) {\n console.error(\"Material-UI: the value provided \".concat(value, \" is out of range [\").concat(min, \", \").concat(max, \"].\"));\n }\n }\n\n if (value < min) {\n return min;\n }\n\n if (value > max) {\n return max;\n }\n\n return value;\n}\n/**\n * Converts a color from CSS hex format to CSS rgb format.\n *\n * @param {string} color - Hex color, i.e. #nnn or #nnnnnn\n * @returns {string} A CSS rgb color string\n */\n\n\nexport function hexToRgb(color) {\n color = color.substr(1);\n var re = new RegExp(\".{1,\".concat(color.length / 3, \"}\"), 'g');\n var colors = color.match(re);\n\n if (colors && colors[0].length === 1) {\n colors = colors.map(function (n) {\n return n + n;\n });\n }\n\n return colors ? \"rgb(\".concat(colors.map(function (n) {\n return parseInt(n, 16);\n }).join(', '), \")\") : '';\n}\n\nfunction intToHex(int) {\n var hex = int.toString(16);\n return hex.length === 1 ? \"0\".concat(hex) : hex;\n}\n/**\n * Converts a color from CSS rgb format to CSS hex format.\n *\n * @param {string} color - RGB color, i.e. rgb(n, n, n)\n * @returns {string} A CSS rgb color string, i.e. #nnnnnn\n */\n\n\nexport function rgbToHex(color) {\n // Idempotent\n if (color.indexOf('#') === 0) {\n return color;\n }\n\n var _decomposeColor = decomposeColor(color),\n values = _decomposeColor.values;\n\n return \"#\".concat(values.map(function (n) {\n return intToHex(n);\n }).join(''));\n}\n/**\n * Converts a color from hsl format to rgb format.\n *\n * @param {string} color - HSL color values\n * @returns {string} rgb color values\n */\n\nexport function hslToRgb(color) {\n color = decomposeColor(color);\n var _color = color,\n values = _color.values;\n var h = values[0];\n var s = values[1] / 100;\n var l = values[2] / 100;\n var a = s * Math.min(l, 1 - l);\n\n var f = function f(n) {\n var k = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : (n + h / 30) % 12;\n return l - a * Math.max(Math.min(k - 3, 9 - k, 1), -1);\n };\n\n var type = 'rgb';\n var rgb = [Math.round(f(0) * 255), Math.round(f(8) * 255), Math.round(f(4) * 255)];\n\n if (color.type === 'hsla') {\n type += 'a';\n rgb.push(values[3]);\n }\n\n return recomposeColor({\n type: type,\n values: rgb\n });\n}\n/**\n * Returns an object with the type and values of a color.\n *\n * Note: Does not support rgb % values.\n *\n * @param {string} color - CSS color, i.e. one of: #nnn, #nnnnnn, rgb(), rgba(), hsl(), hsla()\n * @returns {object} - A MUI color object: {type: string, values: number[]}\n */\n\nexport function decomposeColor(color) {\n // Idempotent\n if (color.type) {\n return color;\n }\n\n if (color.charAt(0) === '#') {\n return decomposeColor(hexToRgb(color));\n }\n\n var marker = color.indexOf('(');\n var type = color.substring(0, marker);\n\n if (['rgb', 'rgba', 'hsl', 'hsla'].indexOf(type) === -1) {\n throw new Error([\"Material-UI: unsupported `\".concat(color, \"` color.\"), 'We support the following formats: #nnn, #nnnnnn, rgb(), rgba(), hsl(), hsla().'].join('\\n'));\n }\n\n var values = color.substring(marker + 1, color.length - 1).split(',');\n values = values.map(function (value) {\n return parseFloat(value);\n });\n return {\n type: type,\n values: values\n };\n}\n/**\n * Converts a color object with type and values to a string.\n *\n * @param {object} color - Decomposed color\n * @param {string} color.type - One of: 'rgb', 'rgba', 'hsl', 'hsla'\n * @param {array} color.values - [n,n,n] or [n,n,n,n]\n * @returns {string} A CSS color string\n */\n\nexport function recomposeColor(color) {\n var type = color.type;\n var values = color.values;\n\n if (type.indexOf('rgb') !== -1) {\n // Only convert the first 3 values to int (i.e. not alpha)\n values = values.map(function (n, i) {\n return i < 3 ? parseInt(n, 10) : n;\n });\n } else if (type.indexOf('hsl') !== -1) {\n values[1] = \"\".concat(values[1], \"%\");\n values[2] = \"\".concat(values[2], \"%\");\n }\n\n return \"\".concat(type, \"(\").concat(values.join(', '), \")\");\n}\n/**\n * Calculates the contrast ratio between two colors.\n *\n * Formula: https://www.w3.org/TR/WCAG20-TECHS/G17.html#G17-tests\n *\n * @param {string} foreground - CSS color, i.e. one of: #nnn, #nnnnnn, rgb(), rgba(), hsl(), hsla()\n * @param {string} background - CSS color, i.e. one of: #nnn, #nnnnnn, rgb(), rgba(), hsl(), hsla()\n * @returns {number} A contrast ratio value in the range 0 - 21.\n */\n\nexport function getContrastRatio(foreground, background) {\n var lumA = getLuminance(foreground);\n var lumB = getLuminance(background);\n return (Math.max(lumA, lumB) + 0.05) / (Math.min(lumA, lumB) + 0.05);\n}\n/**\n * The relative brightness of any point in a color space,\n * normalized to 0 for darkest black and 1 for lightest white.\n *\n * Formula: https://www.w3.org/TR/WCAG20-TECHS/G17.html#G17-tests\n *\n * @param {string} color - CSS color, i.e. one of: #nnn, #nnnnnn, rgb(), rgba(), hsl(), hsla()\n * @returns {number} The relative brightness of the color in the range 0 - 1\n */\n\nexport function getLuminance(color) {\n color = decomposeColor(color);\n var rgb = color.type === 'hsl' ? decomposeColor(hslToRgb(color)).values : color.values;\n rgb = rgb.map(function (val) {\n val /= 255; // normalized\n\n return val <= 0.03928 ? val / 12.92 : Math.pow((val + 0.055) / 1.055, 2.4);\n }); // Truncate at 3 digits\n\n return Number((0.2126 * rgb[0] + 0.7152 * rgb[1] + 0.0722 * rgb[2]).toFixed(3));\n}\n/**\n * Darken or lighten a color, depending on its luminance.\n * Light colors are darkened, dark colors are lightened.\n *\n * @param {string} color - CSS color, i.e. one of: #nnn, #nnnnnn, rgb(), rgba(), hsl(), hsla()\n * @param {number} coefficient=0.15 - multiplier in the range 0 - 1\n * @returns {string} A CSS color string. Hex input values are returned as rgb\n */\n\nexport function emphasize(color) {\n var coefficient = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : 0.15;\n return getLuminance(color) > 0.5 ? darken(color, coefficient) : lighten(color, coefficient);\n}\n/**\n * Set the absolute transparency of a color.\n * Any existing alpha values are overwritten.\n *\n * @param {string} color - CSS color, i.e. one of: #nnn, #nnnnnn, rgb(), rgba(), hsl(), hsla()\n * @param {number} value - value to set the alpha channel to in the range 0 -1\n * @returns {string} A CSS color string. Hex input values are returned as rgb\n */\n\nexport function fade(color, value) {\n color = decomposeColor(color);\n value = clamp(value);\n\n if (color.type === 'rgb' || color.type === 'hsl') {\n color.type += 'a';\n }\n\n color.values[3] = value;\n return recomposeColor(color);\n}\n/**\n * Darkens a color.\n *\n * @param {string} color - CSS color, i.e. one of: #nnn, #nnnnnn, rgb(), rgba(), hsl(), hsla()\n * @param {number} coefficient - multiplier in the range 0 - 1\n * @returns {string} A CSS color string. Hex input values are returned as rgb\n */\n\nexport function darken(color, coefficient) {\n color = decomposeColor(color);\n coefficient = clamp(coefficient);\n\n if (color.type.indexOf('hsl') !== -1) {\n color.values[2] *= 1 - coefficient;\n } else if (color.type.indexOf('rgb') !== -1) {\n for (var i = 0; i < 3; i += 1) {\n color.values[i] *= 1 - coefficient;\n }\n }\n\n return recomposeColor(color);\n}\n/**\n * Lightens a color.\n *\n * @param {string} color - CSS color, i.e. one of: #nnn, #nnnnnn, rgb(), rgba(), hsl(), hsla()\n * @param {number} coefficient - multiplier in the range 0 - 1\n * @returns {string} A CSS color string. Hex input values are returned as rgb\n */\n\nexport function lighten(color, coefficient) {\n color = decomposeColor(color);\n coefficient = clamp(coefficient);\n\n if (color.type.indexOf('hsl') !== -1) {\n color.values[2] += (100 - color.values[2]) * coefficient;\n } else if (color.type.indexOf('rgb') !== -1) {\n for (var i = 0; i < 3; i += 1) {\n color.values[i] += (255 - color.values[i]) * coefficient;\n }\n }\n\n return recomposeColor(color);\n}","export default function _defineProperty(obj, key, value) {\n if (key in obj) {\n Object.defineProperty(obj, key, {\n value: value,\n enumerable: true,\n configurable: true,\n writable: true\n });\n } else {\n obj[key] = value;\n }\n\n return obj;\n}","import arrayWithHoles from \"./arrayWithHoles\";\nimport iterableToArrayLimit from \"./iterableToArrayLimit\";\nimport unsupportedIterableToArray from \"./unsupportedIterableToArray\";\nimport nonIterableRest from \"./nonIterableRest\";\nexport default function _slicedToArray(arr, i) {\n return arrayWithHoles(arr) || iterableToArrayLimit(arr, i) || unsupportedIterableToArray(arr, i) || nonIterableRest();\n}","export default function _arrayWithHoles(arr) {\n if (Array.isArray(arr)) return arr;\n}","export default function _iterableToArrayLimit(arr, i) {\n if (typeof Symbol === \"undefined\" || !(Symbol.iterator in Object(arr))) return;\n var _arr = [];\n var _n = true;\n var _d = false;\n var _e = undefined;\n\n try {\n for (var _i = arr[Symbol.iterator](), _s; !(_n = (_s = _i.next()).done); _n = true) {\n _arr.push(_s.value);\n\n if (i && _arr.length === i) break;\n }\n } catch (err) {\n _d = true;\n _e = err;\n } finally {\n try {\n if (!_n && _i[\"return\"] != null) _i[\"return\"]();\n } finally {\n if (_d) throw _e;\n }\n }\n\n return _arr;\n}","export default function _nonIterableRest() {\n throw new TypeError(\"Invalid attempt to destructure non-iterable instance.\\nIn order to be iterable, non-array objects must have a [Symbol.iterator]() method.\");\n}","/*\nHTML escaping is the same as React's\n(on purpose.) Therefore, it has the following Copyright and Licensing:\n\nCopyright 2013-2014, Facebook, Inc.\nAll rights reserved.\n\nThis source code is licensed under the BSD-style license found in the LICENSE\nfile in the root directory of React's source tree.\n*/\nimport * as React from 'react';\nimport IntlMessageFormat from 'intl-messageformat';\nimport memoizeIntlConstructor from 'intl-format-cache';\n// Since rollup cannot deal with namespace being a function,\n// this is to interop with TypeScript since `invariant`\n// does not export a default\n// https://github.com/rollup/rollup/issues/1267\nimport * as invariant_ from 'invariant';\nconst invariant = invariant_.default || invariant_;\nconst ESCAPED_CHARS = {\n 38: '&',\n 62: '>',\n 60: '<',\n 34: '"',\n 39: ''',\n};\nconst UNSAFE_CHARS_REGEX = /[&><\"']/g;\nexport function escape(str) {\n return ('' + str).replace(UNSAFE_CHARS_REGEX, match => ESCAPED_CHARS[match.charCodeAt(0)]);\n}\nexport function filterProps(props, whitelist, defaults = {}) {\n return whitelist.reduce((filtered, name) => {\n if (name in props) {\n filtered[name] = props[name];\n }\n else if (name in defaults) {\n filtered[name] = defaults[name];\n }\n return filtered;\n }, {});\n}\nexport function invariantIntlContext(intl) {\n invariant(intl, '[React Intl] Could not find required `intl` object. ' +\n '' + func(text) + '
';\n * });\n *\n * p('fred, barney, & pebbles');\n * // => 'fred, barney, & pebbles
'\n */\n function wrap(value, wrapper) {\n return partial(castFunction(wrapper), value);\n }\n\n /*------------------------------------------------------------------------*/\n\n /**\n * Casts `value` as an array if it's not one.\n *\n * @static\n * @memberOf _\n * @since 4.4.0\n * @category Lang\n * @param {*} value The value to inspect.\n * @returns {Array} Returns the cast array.\n * @example\n *\n * _.castArray(1);\n * // => [1]\n *\n * _.castArray({ 'a': 1 });\n * // => [{ 'a': 1 }]\n *\n * _.castArray('abc');\n * // => ['abc']\n *\n * _.castArray(null);\n * // => [null]\n *\n * _.castArray(undefined);\n * // => [undefined]\n *\n * _.castArray();\n * // => []\n *\n * var array = [1, 2, 3];\n * console.log(_.castArray(array) === array);\n * // => true\n */\n function castArray() {\n if (!arguments.length) {\n return [];\n }\n var value = arguments[0];\n return isArray(value) ? value : [value];\n }\n\n /**\n * Creates a shallow clone of `value`.\n *\n * **Note:** This method is loosely based on the\n * [structured clone algorithm](https://mdn.io/Structured_clone_algorithm)\n * and supports cloning arrays, array buffers, booleans, date objects, maps,\n * numbers, `Object` objects, regexes, sets, strings, symbols, and typed\n * arrays. The own enumerable properties of `arguments` objects are cloned\n * as plain objects. An empty object is returned for uncloneable values such\n * as error objects, functions, DOM nodes, and WeakMaps.\n *\n * @static\n * @memberOf _\n * @since 0.1.0\n * @category Lang\n * @param {*} value The value to clone.\n * @returns {*} Returns the cloned value.\n * @see _.cloneDeep\n * @example\n *\n * var objects = [{ 'a': 1 }, { 'b': 2 }];\n *\n * var shallow = _.clone(objects);\n * console.log(shallow[0] === objects[0]);\n * // => true\n */\n function clone(value) {\n return baseClone(value, CLONE_SYMBOLS_FLAG);\n }\n\n /**\n * This method is like `_.clone` except that it accepts `customizer` which\n * is invoked to produce the cloned value. If `customizer` returns `undefined`,\n * cloning is handled by the method instead. The `customizer` is invoked with\n * up to four arguments; (value [, index|key, object, stack]).\n *\n * @static\n * @memberOf _\n * @since 4.0.0\n * @category Lang\n * @param {*} value The value to clone.\n * @param {Function} [customizer] The function to customize cloning.\n * @returns {*} Returns the cloned value.\n * @see _.cloneDeepWith\n * @example\n *\n * function customizer(value) {\n * if (_.isElement(value)) {\n * return value.cloneNode(false);\n * }\n * }\n *\n * var el = _.cloneWith(document.body, customizer);\n *\n * console.log(el === document.body);\n * // => false\n * console.log(el.nodeName);\n * // => 'BODY'\n * console.log(el.childNodes.length);\n * // => 0\n */\n function cloneWith(value, customizer) {\n customizer = typeof customizer == 'function' ? customizer : undefined;\n return baseClone(value, CLONE_SYMBOLS_FLAG, customizer);\n }\n\n /**\n * This method is like `_.clone` except that it recursively clones `value`.\n *\n * @static\n * @memberOf _\n * @since 1.0.0\n * @category Lang\n * @param {*} value The value to recursively clone.\n * @returns {*} Returns the deep cloned value.\n * @see _.clone\n * @example\n *\n * var objects = [{ 'a': 1 }, { 'b': 2 }];\n *\n * var deep = _.cloneDeep(objects);\n * console.log(deep[0] === objects[0]);\n * // => false\n */\n function cloneDeep(value) {\n return baseClone(value, CLONE_DEEP_FLAG | CLONE_SYMBOLS_FLAG);\n }\n\n /**\n * This method is like `_.cloneWith` except that it recursively clones `value`.\n *\n * @static\n * @memberOf _\n * @since 4.0.0\n * @category Lang\n * @param {*} value The value to recursively clone.\n * @param {Function} [customizer] The function to customize cloning.\n * @returns {*} Returns the deep cloned value.\n * @see _.cloneWith\n * @example\n *\n * function customizer(value) {\n * if (_.isElement(value)) {\n * return value.cloneNode(true);\n * }\n * }\n *\n * var el = _.cloneDeepWith(document.body, customizer);\n *\n * console.log(el === document.body);\n * // => false\n * console.log(el.nodeName);\n * // => 'BODY'\n * console.log(el.childNodes.length);\n * // => 20\n */\n function cloneDeepWith(value, customizer) {\n customizer = typeof customizer == 'function' ? customizer : undefined;\n return baseClone(value, CLONE_DEEP_FLAG | CLONE_SYMBOLS_FLAG, customizer);\n }\n\n /**\n * Checks if `object` conforms to `source` by invoking the predicate\n * properties of `source` with the corresponding property values of `object`.\n *\n * **Note:** This method is equivalent to `_.conforms` when `source` is\n * partially applied.\n *\n * @static\n * @memberOf _\n * @since 4.14.0\n * @category Lang\n * @param {Object} object The object to inspect.\n * @param {Object} source The object of property predicates to conform to.\n * @returns {boolean} Returns `true` if `object` conforms, else `false`.\n * @example\n *\n * var object = { 'a': 1, 'b': 2 };\n *\n * _.conformsTo(object, { 'b': function(n) { return n > 1; } });\n * // => true\n *\n * _.conformsTo(object, { 'b': function(n) { return n > 2; } });\n * // => false\n */\n function conformsTo(object, source) {\n return source == null || baseConformsTo(object, source, keys(source));\n }\n\n /**\n * Performs a\n * [`SameValueZero`](http://ecma-international.org/ecma-262/7.0/#sec-samevaluezero)\n * comparison between two values to determine if they are equivalent.\n *\n * @static\n * @memberOf _\n * @since 4.0.0\n * @category Lang\n * @param {*} value The value to compare.\n * @param {*} other The other value to compare.\n * @returns {boolean} Returns `true` if the values are equivalent, else `false`.\n * @example\n *\n * var object = { 'a': 1 };\n * var other = { 'a': 1 };\n *\n * _.eq(object, object);\n * // => true\n *\n * _.eq(object, other);\n * // => false\n *\n * _.eq('a', 'a');\n * // => true\n *\n * _.eq('a', Object('a'));\n * // => false\n *\n * _.eq(NaN, NaN);\n * // => true\n */\n function eq(value, other) {\n return value === other || (value !== value && other !== other);\n }\n\n /**\n * Checks if `value` is greater than `other`.\n *\n * @static\n * @memberOf _\n * @since 3.9.0\n * @category Lang\n * @param {*} value The value to compare.\n * @param {*} other The other value to compare.\n * @returns {boolean} Returns `true` if `value` is greater than `other`,\n * else `false`.\n * @see _.lt\n * @example\n *\n * _.gt(3, 1);\n * // => true\n *\n * _.gt(3, 3);\n * // => false\n *\n * _.gt(1, 3);\n * // => false\n */\n var gt = createRelationalOperation(baseGt);\n\n /**\n * Checks if `value` is greater than or equal to `other`.\n *\n * @static\n * @memberOf _\n * @since 3.9.0\n * @category Lang\n * @param {*} value The value to compare.\n * @param {*} other The other value to compare.\n * @returns {boolean} Returns `true` if `value` is greater than or equal to\n * `other`, else `false`.\n * @see _.lte\n * @example\n *\n * _.gte(3, 1);\n * // => true\n *\n * _.gte(3, 3);\n * // => true\n *\n * _.gte(1, 3);\n * // => false\n */\n var gte = createRelationalOperation(function(value, other) {\n return value >= other;\n });\n\n /**\n * Checks if `value` is likely an `arguments` object.\n *\n * @static\n * @memberOf _\n * @since 0.1.0\n * @category Lang\n * @param {*} value The value to check.\n * @returns {boolean} Returns `true` if `value` is an `arguments` object,\n * else `false`.\n * @example\n *\n * _.isArguments(function() { return arguments; }());\n * // => true\n *\n * _.isArguments([1, 2, 3]);\n * // => false\n */\n var isArguments = baseIsArguments(function() { return arguments; }()) ? baseIsArguments : function(value) {\n return isObjectLike(value) && hasOwnProperty.call(value, 'callee') &&\n !propertyIsEnumerable.call(value, 'callee');\n };\n\n /**\n * Checks if `value` is classified as an `Array` object.\n *\n * @static\n * @memberOf _\n * @since 0.1.0\n * @category Lang\n * @param {*} value The value to check.\n * @returns {boolean} Returns `true` if `value` is an array, else `false`.\n * @example\n *\n * _.isArray([1, 2, 3]);\n * // => true\n *\n * _.isArray(document.body.children);\n * // => false\n *\n * _.isArray('abc');\n * // => false\n *\n * _.isArray(_.noop);\n * // => false\n */\n var isArray = Array.isArray;\n\n /**\n * Checks if `value` is classified as an `ArrayBuffer` object.\n *\n * @static\n * @memberOf _\n * @since 4.3.0\n * @category Lang\n * @param {*} value The value to check.\n * @returns {boolean} Returns `true` if `value` is an array buffer, else `false`.\n * @example\n *\n * _.isArrayBuffer(new ArrayBuffer(2));\n * // => true\n *\n * _.isArrayBuffer(new Array(2));\n * // => false\n */\n var isArrayBuffer = nodeIsArrayBuffer ? baseUnary(nodeIsArrayBuffer) : baseIsArrayBuffer;\n\n /**\n * Checks if `value` is array-like. A value is considered array-like if it's\n * not a function and has a `value.length` that's an integer greater than or\n * equal to `0` and less than or equal to `Number.MAX_SAFE_INTEGER`.\n *\n * @static\n * @memberOf _\n * @since 4.0.0\n * @category Lang\n * @param {*} value The value to check.\n * @returns {boolean} Returns `true` if `value` is array-like, else `false`.\n * @example\n *\n * _.isArrayLike([1, 2, 3]);\n * // => true\n *\n * _.isArrayLike(document.body.children);\n * // => true\n *\n * _.isArrayLike('abc');\n * // => true\n *\n * _.isArrayLike(_.noop);\n * // => false\n */\n function isArrayLike(value) {\n return value != null && isLength(value.length) && !isFunction(value);\n }\n\n /**\n * This method is like `_.isArrayLike` except that it also checks if `value`\n * is an object.\n *\n * @static\n * @memberOf _\n * @since 4.0.0\n * @category Lang\n * @param {*} value The value to check.\n * @returns {boolean} Returns `true` if `value` is an array-like object,\n * else `false`.\n * @example\n *\n * _.isArrayLikeObject([1, 2, 3]);\n * // => true\n *\n * _.isArrayLikeObject(document.body.children);\n * // => true\n *\n * _.isArrayLikeObject('abc');\n * // => false\n *\n * _.isArrayLikeObject(_.noop);\n * // => false\n */\n function isArrayLikeObject(value) {\n return isObjectLike(value) && isArrayLike(value);\n }\n\n /**\n * Checks if `value` is classified as a boolean primitive or object.\n *\n * @static\n * @memberOf _\n * @since 0.1.0\n * @category Lang\n * @param {*} value The value to check.\n * @returns {boolean} Returns `true` if `value` is a boolean, else `false`.\n * @example\n *\n * _.isBoolean(false);\n * // => true\n *\n * _.isBoolean(null);\n * // => false\n */\n function isBoolean(value) {\n return value === true || value === false ||\n (isObjectLike(value) && baseGetTag(value) == boolTag);\n }\n\n /**\n * Checks if `value` is a buffer.\n *\n * @static\n * @memberOf _\n * @since 4.3.0\n * @category Lang\n * @param {*} value The value to check.\n * @returns {boolean} Returns `true` if `value` is a buffer, else `false`.\n * @example\n *\n * _.isBuffer(new Buffer(2));\n * // => true\n *\n * _.isBuffer(new Uint8Array(2));\n * // => false\n */\n var isBuffer = nativeIsBuffer || stubFalse;\n\n /**\n * Checks if `value` is classified as a `Date` object.\n *\n * @static\n * @memberOf _\n * @since 0.1.0\n * @category Lang\n * @param {*} value The value to check.\n * @returns {boolean} Returns `true` if `value` is a date object, else `false`.\n * @example\n *\n * _.isDate(new Date);\n * // => true\n *\n * _.isDate('Mon April 23 2012');\n * // => false\n */\n var isDate = nodeIsDate ? baseUnary(nodeIsDate) : baseIsDate;\n\n /**\n * Checks if `value` is likely a DOM element.\n *\n * @static\n * @memberOf _\n * @since 0.1.0\n * @category Lang\n * @param {*} value The value to check.\n * @returns {boolean} Returns `true` if `value` is a DOM element, else `false`.\n * @example\n *\n * _.isElement(document.body);\n * // => true\n *\n * _.isElement('');\n * // => false\n */\n function isElement(value) {\n return isObjectLike(value) && value.nodeType === 1 && !isPlainObject(value);\n }\n\n /**\n * Checks if `value` is an empty object, collection, map, or set.\n *\n * Objects are considered empty if they have no own enumerable string keyed\n * properties.\n *\n * Array-like values such as `arguments` objects, arrays, buffers, strings, or\n * jQuery-like collections are considered empty if they have a `length` of `0`.\n * Similarly, maps and sets are considered empty if they have a `size` of `0`.\n *\n * @static\n * @memberOf _\n * @since 0.1.0\n * @category Lang\n * @param {*} value The value to check.\n * @returns {boolean} Returns `true` if `value` is empty, else `false`.\n * @example\n *\n * _.isEmpty(null);\n * // => true\n *\n * _.isEmpty(true);\n * // => true\n *\n * _.isEmpty(1);\n * // => true\n *\n * _.isEmpty([1, 2, 3]);\n * // => false\n *\n * _.isEmpty({ 'a': 1 });\n * // => false\n */\n function isEmpty(value) {\n if (value == null) {\n return true;\n }\n if (isArrayLike(value) &&\n (isArray(value) || typeof value == 'string' || typeof value.splice == 'function' ||\n isBuffer(value) || isTypedArray(value) || isArguments(value))) {\n return !value.length;\n }\n var tag = getTag(value);\n if (tag == mapTag || tag == setTag) {\n return !value.size;\n }\n if (isPrototype(value)) {\n return !baseKeys(value).length;\n }\n for (var key in value) {\n if (hasOwnProperty.call(value, key)) {\n return false;\n }\n }\n return true;\n }\n\n /**\n * Performs a deep comparison between two values to determine if they are\n * equivalent.\n *\n * **Note:** This method supports comparing arrays, array buffers, booleans,\n * date objects, error objects, maps, numbers, `Object` objects, regexes,\n * sets, strings, symbols, and typed arrays. `Object` objects are compared\n * by their own, not inherited, enumerable properties. Functions and DOM\n * nodes are compared by strict equality, i.e. `===`.\n *\n * @static\n * @memberOf _\n * @since 0.1.0\n * @category Lang\n * @param {*} value The value to compare.\n * @param {*} other The other value to compare.\n * @returns {boolean} Returns `true` if the values are equivalent, else `false`.\n * @example\n *\n * var object = { 'a': 1 };\n * var other = { 'a': 1 };\n *\n * _.isEqual(object, other);\n * // => true\n *\n * object === other;\n * // => false\n */\n function isEqual(value, other) {\n return baseIsEqual(value, other);\n }\n\n /**\n * This method is like `_.isEqual` except that it accepts `customizer` which\n * is invoked to compare values. If `customizer` returns `undefined`, comparisons\n * are handled by the method instead. The `customizer` is invoked with up to\n * six arguments: (objValue, othValue [, index|key, object, other, stack]).\n *\n * @static\n * @memberOf _\n * @since 4.0.0\n * @category Lang\n * @param {*} value The value to compare.\n * @param {*} other The other value to compare.\n * @param {Function} [customizer] The function to customize comparisons.\n * @returns {boolean} Returns `true` if the values are equivalent, else `false`.\n * @example\n *\n * function isGreeting(value) {\n * return /^h(?:i|ello)$/.test(value);\n * }\n *\n * function customizer(objValue, othValue) {\n * if (isGreeting(objValue) && isGreeting(othValue)) {\n * return true;\n * }\n * }\n *\n * var array = ['hello', 'goodbye'];\n * var other = ['hi', 'goodbye'];\n *\n * _.isEqualWith(array, other, customizer);\n * // => true\n */\n function isEqualWith(value, other, customizer) {\n customizer = typeof customizer == 'function' ? customizer : undefined;\n var result = customizer ? customizer(value, other) : undefined;\n return result === undefined ? baseIsEqual(value, other, undefined, customizer) : !!result;\n }\n\n /**\n * Checks if `value` is an `Error`, `EvalError`, `RangeError`, `ReferenceError`,\n * `SyntaxError`, `TypeError`, or `URIError` object.\n *\n * @static\n * @memberOf _\n * @since 3.0.0\n * @category Lang\n * @param {*} value The value to check.\n * @returns {boolean} Returns `true` if `value` is an error object, else `false`.\n * @example\n *\n * _.isError(new Error);\n * // => true\n *\n * _.isError(Error);\n * // => false\n */\n function isError(value) {\n if (!isObjectLike(value)) {\n return false;\n }\n var tag = baseGetTag(value);\n return tag == errorTag || tag == domExcTag ||\n (typeof value.message == 'string' && typeof value.name == 'string' && !isPlainObject(value));\n }\n\n /**\n * Checks if `value` is a finite primitive number.\n *\n * **Note:** This method is based on\n * [`Number.isFinite`](https://mdn.io/Number/isFinite).\n *\n * @static\n * @memberOf _\n * @since 0.1.0\n * @category Lang\n * @param {*} value The value to check.\n * @returns {boolean} Returns `true` if `value` is a finite number, else `false`.\n * @example\n *\n * _.isFinite(3);\n * // => true\n *\n * _.isFinite(Number.MIN_VALUE);\n * // => true\n *\n * _.isFinite(Infinity);\n * // => false\n *\n * _.isFinite('3');\n * // => false\n */\n function isFinite(value) {\n return typeof value == 'number' && nativeIsFinite(value);\n }\n\n /**\n * Checks if `value` is classified as a `Function` object.\n *\n * @static\n * @memberOf _\n * @since 0.1.0\n * @category Lang\n * @param {*} value The value to check.\n * @returns {boolean} Returns `true` if `value` is a function, else `false`.\n * @example\n *\n * _.isFunction(_);\n * // => true\n *\n * _.isFunction(/abc/);\n * // => false\n */\n function isFunction(value) {\n if (!isObject(value)) {\n return false;\n }\n // The use of `Object#toString` avoids issues with the `typeof` operator\n // in Safari 9 which returns 'object' for typed arrays and other constructors.\n var tag = baseGetTag(value);\n return tag == funcTag || tag == genTag || tag == asyncTag || tag == proxyTag;\n }\n\n /**\n * Checks if `value` is an integer.\n *\n * **Note:** This method is based on\n * [`Number.isInteger`](https://mdn.io/Number/isInteger).\n *\n * @static\n * @memberOf _\n * @since 4.0.0\n * @category Lang\n * @param {*} value The value to check.\n * @returns {boolean} Returns `true` if `value` is an integer, else `false`.\n * @example\n *\n * _.isInteger(3);\n * // => true\n *\n * _.isInteger(Number.MIN_VALUE);\n * // => false\n *\n * _.isInteger(Infinity);\n * // => false\n *\n * _.isInteger('3');\n * // => false\n */\n function isInteger(value) {\n return typeof value == 'number' && value == toInteger(value);\n }\n\n /**\n * Checks if `value` is a valid array-like length.\n *\n * **Note:** This method is loosely based on\n * [`ToLength`](http://ecma-international.org/ecma-262/7.0/#sec-tolength).\n *\n * @static\n * @memberOf _\n * @since 4.0.0\n * @category Lang\n * @param {*} value The value to check.\n * @returns {boolean} Returns `true` if `value` is a valid length, else `false`.\n * @example\n *\n * _.isLength(3);\n * // => true\n *\n * _.isLength(Number.MIN_VALUE);\n * // => false\n *\n * _.isLength(Infinity);\n * // => false\n *\n * _.isLength('3');\n * // => false\n */\n function isLength(value) {\n return typeof value == 'number' &&\n value > -1 && value % 1 == 0 && value <= MAX_SAFE_INTEGER;\n }\n\n /**\n * Checks if `value` is the\n * [language type](http://www.ecma-international.org/ecma-262/7.0/#sec-ecmascript-language-types)\n * of `Object`. (e.g. arrays, functions, objects, regexes, `new Number(0)`, and `new String('')`)\n *\n * @static\n * @memberOf _\n * @since 0.1.0\n * @category Lang\n * @param {*} value The value to check.\n * @returns {boolean} Returns `true` if `value` is an object, else `false`.\n * @example\n *\n * _.isObject({});\n * // => true\n *\n * _.isObject([1, 2, 3]);\n * // => true\n *\n * _.isObject(_.noop);\n * // => true\n *\n * _.isObject(null);\n * // => false\n */\n function isObject(value) {\n var type = typeof value;\n return value != null && (type == 'object' || type == 'function');\n }\n\n /**\n * Checks if `value` is object-like. A value is object-like if it's not `null`\n * and has a `typeof` result of \"object\".\n *\n * @static\n * @memberOf _\n * @since 4.0.0\n * @category Lang\n * @param {*} value The value to check.\n * @returns {boolean} Returns `true` if `value` is object-like, else `false`.\n * @example\n *\n * _.isObjectLike({});\n * // => true\n *\n * _.isObjectLike([1, 2, 3]);\n * // => true\n *\n * _.isObjectLike(_.noop);\n * // => false\n *\n * _.isObjectLike(null);\n * // => false\n */\n function isObjectLike(value) {\n return value != null && typeof value == 'object';\n }\n\n /**\n * Checks if `value` is classified as a `Map` object.\n *\n * @static\n * @memberOf _\n * @since 4.3.0\n * @category Lang\n * @param {*} value The value to check.\n * @returns {boolean} Returns `true` if `value` is a map, else `false`.\n * @example\n *\n * _.isMap(new Map);\n * // => true\n *\n * _.isMap(new WeakMap);\n * // => false\n */\n var isMap = nodeIsMap ? baseUnary(nodeIsMap) : baseIsMap;\n\n /**\n * Performs a partial deep comparison between `object` and `source` to\n * determine if `object` contains equivalent property values.\n *\n * **Note:** This method is equivalent to `_.matches` when `source` is\n * partially applied.\n *\n * Partial comparisons will match empty array and empty object `source`\n * values against any array or object value, respectively. See `_.isEqual`\n * for a list of supported value comparisons.\n *\n * @static\n * @memberOf _\n * @since 3.0.0\n * @category Lang\n * @param {Object} object The object to inspect.\n * @param {Object} source The object of property values to match.\n * @returns {boolean} Returns `true` if `object` is a match, else `false`.\n * @example\n *\n * var object = { 'a': 1, 'b': 2 };\n *\n * _.isMatch(object, { 'b': 2 });\n * // => true\n *\n * _.isMatch(object, { 'b': 1 });\n * // => false\n */\n function isMatch(object, source) {\n return object === source || baseIsMatch(object, source, getMatchData(source));\n }\n\n /**\n * This method is like `_.isMatch` except that it accepts `customizer` which\n * is invoked to compare values. If `customizer` returns `undefined`, comparisons\n * are handled by the method instead. The `customizer` is invoked with five\n * arguments: (objValue, srcValue, index|key, object, source).\n *\n * @static\n * @memberOf _\n * @since 4.0.0\n * @category Lang\n * @param {Object} object The object to inspect.\n * @param {Object} source The object of property values to match.\n * @param {Function} [customizer] The function to customize comparisons.\n * @returns {boolean} Returns `true` if `object` is a match, else `false`.\n * @example\n *\n * function isGreeting(value) {\n * return /^h(?:i|ello)$/.test(value);\n * }\n *\n * function customizer(objValue, srcValue) {\n * if (isGreeting(objValue) && isGreeting(srcValue)) {\n * return true;\n * }\n * }\n *\n * var object = { 'greeting': 'hello' };\n * var source = { 'greeting': 'hi' };\n *\n * _.isMatchWith(object, source, customizer);\n * // => true\n */\n function isMatchWith(object, source, customizer) {\n customizer = typeof customizer == 'function' ? customizer : undefined;\n return baseIsMatch(object, source, getMatchData(source), customizer);\n }\n\n /**\n * Checks if `value` is `NaN`.\n *\n * **Note:** This method is based on\n * [`Number.isNaN`](https://mdn.io/Number/isNaN) and is not the same as\n * global [`isNaN`](https://mdn.io/isNaN) which returns `true` for\n * `undefined` and other non-number values.\n *\n * @static\n * @memberOf _\n * @since 0.1.0\n * @category Lang\n * @param {*} value The value to check.\n * @returns {boolean} Returns `true` if `value` is `NaN`, else `false`.\n * @example\n *\n * _.isNaN(NaN);\n * // => true\n *\n * _.isNaN(new Number(NaN));\n * // => true\n *\n * isNaN(undefined);\n * // => true\n *\n * _.isNaN(undefined);\n * // => false\n */\n function isNaN(value) {\n // An `NaN` primitive is the only value that is not equal to itself.\n // Perform the `toStringTag` check first to avoid errors with some\n // ActiveX objects in IE.\n return isNumber(value) && value != +value;\n }\n\n /**\n * Checks if `value` is a pristine native function.\n *\n * **Note:** This method can't reliably detect native functions in the presence\n * of the core-js package because core-js circumvents this kind of detection.\n * Despite multiple requests, the core-js maintainer has made it clear: any\n * attempt to fix the detection will be obstructed. As a result, we're left\n * with little choice but to throw an error. Unfortunately, this also affects\n * packages, like [babel-polyfill](https://www.npmjs.com/package/babel-polyfill),\n * which rely on core-js.\n *\n * @static\n * @memberOf _\n * @since 3.0.0\n * @category Lang\n * @param {*} value The value to check.\n * @returns {boolean} Returns `true` if `value` is a native function,\n * else `false`.\n * @example\n *\n * _.isNative(Array.prototype.push);\n * // => true\n *\n * _.isNative(_);\n * // => false\n */\n function isNative(value) {\n if (isMaskable(value)) {\n throw new Error(CORE_ERROR_TEXT);\n }\n return baseIsNative(value);\n }\n\n /**\n * Checks if `value` is `null`.\n *\n * @static\n * @memberOf _\n * @since 0.1.0\n * @category Lang\n * @param {*} value The value to check.\n * @returns {boolean} Returns `true` if `value` is `null`, else `false`.\n * @example\n *\n * _.isNull(null);\n * // => true\n *\n * _.isNull(void 0);\n * // => false\n */\n function isNull(value) {\n return value === null;\n }\n\n /**\n * Checks if `value` is `null` or `undefined`.\n *\n * @static\n * @memberOf _\n * @since 4.0.0\n * @category Lang\n * @param {*} value The value to check.\n * @returns {boolean} Returns `true` if `value` is nullish, else `false`.\n * @example\n *\n * _.isNil(null);\n * // => true\n *\n * _.isNil(void 0);\n * // => true\n *\n * _.isNil(NaN);\n * // => false\n */\n function isNil(value) {\n return value == null;\n }\n\n /**\n * Checks if `value` is classified as a `Number` primitive or object.\n *\n * **Note:** To exclude `Infinity`, `-Infinity`, and `NaN`, which are\n * classified as numbers, use the `_.isFinite` method.\n *\n * @static\n * @memberOf _\n * @since 0.1.0\n * @category Lang\n * @param {*} value The value to check.\n * @returns {boolean} Returns `true` if `value` is a number, else `false`.\n * @example\n *\n * _.isNumber(3);\n * // => true\n *\n * _.isNumber(Number.MIN_VALUE);\n * // => true\n *\n * _.isNumber(Infinity);\n * // => true\n *\n * _.isNumber('3');\n * // => false\n */\n function isNumber(value) {\n return typeof value == 'number' ||\n (isObjectLike(value) && baseGetTag(value) == numberTag);\n }\n\n /**\n * Checks if `value` is a plain object, that is, an object created by the\n * `Object` constructor or one with a `[[Prototype]]` of `null`.\n *\n * @static\n * @memberOf _\n * @since 0.8.0\n * @category Lang\n * @param {*} value The value to check.\n * @returns {boolean} Returns `true` if `value` is a plain object, else `false`.\n * @example\n *\n * function Foo() {\n * this.a = 1;\n * }\n *\n * _.isPlainObject(new Foo);\n * // => false\n *\n * _.isPlainObject([1, 2, 3]);\n * // => false\n *\n * _.isPlainObject({ 'x': 0, 'y': 0 });\n * // => true\n *\n * _.isPlainObject(Object.create(null));\n * // => true\n */\n function isPlainObject(value) {\n if (!isObjectLike(value) || baseGetTag(value) != objectTag) {\n return false;\n }\n var proto = getPrototype(value);\n if (proto === null) {\n return true;\n }\n var Ctor = hasOwnProperty.call(proto, 'constructor') && proto.constructor;\n return typeof Ctor == 'function' && Ctor instanceof Ctor &&\n funcToString.call(Ctor) == objectCtorString;\n }\n\n /**\n * Checks if `value` is classified as a `RegExp` object.\n *\n * @static\n * @memberOf _\n * @since 0.1.0\n * @category Lang\n * @param {*} value The value to check.\n * @returns {boolean} Returns `true` if `value` is a regexp, else `false`.\n * @example\n *\n * _.isRegExp(/abc/);\n * // => true\n *\n * _.isRegExp('/abc/');\n * // => false\n */\n var isRegExp = nodeIsRegExp ? baseUnary(nodeIsRegExp) : baseIsRegExp;\n\n /**\n * Checks if `value` is a safe integer. An integer is safe if it's an IEEE-754\n * double precision number which isn't the result of a rounded unsafe integer.\n *\n * **Note:** This method is based on\n * [`Number.isSafeInteger`](https://mdn.io/Number/isSafeInteger).\n *\n * @static\n * @memberOf _\n * @since 4.0.0\n * @category Lang\n * @param {*} value The value to check.\n * @returns {boolean} Returns `true` if `value` is a safe integer, else `false`.\n * @example\n *\n * _.isSafeInteger(3);\n * // => true\n *\n * _.isSafeInteger(Number.MIN_VALUE);\n * // => false\n *\n * _.isSafeInteger(Infinity);\n * // => false\n *\n * _.isSafeInteger('3');\n * // => false\n */\n function isSafeInteger(value) {\n return isInteger(value) && value >= -MAX_SAFE_INTEGER && value <= MAX_SAFE_INTEGER;\n }\n\n /**\n * Checks if `value` is classified as a `Set` object.\n *\n * @static\n * @memberOf _\n * @since 4.3.0\n * @category Lang\n * @param {*} value The value to check.\n * @returns {boolean} Returns `true` if `value` is a set, else `false`.\n * @example\n *\n * _.isSet(new Set);\n * // => true\n *\n * _.isSet(new WeakSet);\n * // => false\n */\n var isSet = nodeIsSet ? baseUnary(nodeIsSet) : baseIsSet;\n\n /**\n * Checks if `value` is classified as a `String` primitive or object.\n *\n * @static\n * @since 0.1.0\n * @memberOf _\n * @category Lang\n * @param {*} value The value to check.\n * @returns {boolean} Returns `true` if `value` is a string, else `false`.\n * @example\n *\n * _.isString('abc');\n * // => true\n *\n * _.isString(1);\n * // => false\n */\n function isString(value) {\n return typeof value == 'string' ||\n (!isArray(value) && isObjectLike(value) && baseGetTag(value) == stringTag);\n }\n\n /**\n * Checks if `value` is classified as a `Symbol` primitive or object.\n *\n * @static\n * @memberOf _\n * @since 4.0.0\n * @category Lang\n * @param {*} value The value to check.\n * @returns {boolean} Returns `true` if `value` is a symbol, else `false`.\n * @example\n *\n * _.isSymbol(Symbol.iterator);\n * // => true\n *\n * _.isSymbol('abc');\n * // => false\n */\n function isSymbol(value) {\n return typeof value == 'symbol' ||\n (isObjectLike(value) && baseGetTag(value) == symbolTag);\n }\n\n /**\n * Checks if `value` is classified as a typed array.\n *\n * @static\n * @memberOf _\n * @since 3.0.0\n * @category Lang\n * @param {*} value The value to check.\n * @returns {boolean} Returns `true` if `value` is a typed array, else `false`.\n * @example\n *\n * _.isTypedArray(new Uint8Array);\n * // => true\n *\n * _.isTypedArray([]);\n * // => false\n */\n var isTypedArray = nodeIsTypedArray ? baseUnary(nodeIsTypedArray) : baseIsTypedArray;\n\n /**\n * Checks if `value` is `undefined`.\n *\n * @static\n * @since 0.1.0\n * @memberOf _\n * @category Lang\n * @param {*} value The value to check.\n * @returns {boolean} Returns `true` if `value` is `undefined`, else `false`.\n * @example\n *\n * _.isUndefined(void 0);\n * // => true\n *\n * _.isUndefined(null);\n * // => false\n */\n function isUndefined(value) {\n return value === undefined;\n }\n\n /**\n * Checks if `value` is classified as a `WeakMap` object.\n *\n * @static\n * @memberOf _\n * @since 4.3.0\n * @category Lang\n * @param {*} value The value to check.\n * @returns {boolean} Returns `true` if `value` is a weak map, else `false`.\n * @example\n *\n * _.isWeakMap(new WeakMap);\n * // => true\n *\n * _.isWeakMap(new Map);\n * // => false\n */\n function isWeakMap(value) {\n return isObjectLike(value) && getTag(value) == weakMapTag;\n }\n\n /**\n * Checks if `value` is classified as a `WeakSet` object.\n *\n * @static\n * @memberOf _\n * @since 4.3.0\n * @category Lang\n * @param {*} value The value to check.\n * @returns {boolean} Returns `true` if `value` is a weak set, else `false`.\n * @example\n *\n * _.isWeakSet(new WeakSet);\n * // => true\n *\n * _.isWeakSet(new Set);\n * // => false\n */\n function isWeakSet(value) {\n return isObjectLike(value) && baseGetTag(value) == weakSetTag;\n }\n\n /**\n * Checks if `value` is less than `other`.\n *\n * @static\n * @memberOf _\n * @since 3.9.0\n * @category Lang\n * @param {*} value The value to compare.\n * @param {*} other The other value to compare.\n * @returns {boolean} Returns `true` if `value` is less than `other`,\n * else `false`.\n * @see _.gt\n * @example\n *\n * _.lt(1, 3);\n * // => true\n *\n * _.lt(3, 3);\n * // => false\n *\n * _.lt(3, 1);\n * // => false\n */\n var lt = createRelationalOperation(baseLt);\n\n /**\n * Checks if `value` is less than or equal to `other`.\n *\n * @static\n * @memberOf _\n * @since 3.9.0\n * @category Lang\n * @param {*} value The value to compare.\n * @param {*} other The other value to compare.\n * @returns {boolean} Returns `true` if `value` is less than or equal to\n * `other`, else `false`.\n * @see _.gte\n * @example\n *\n * _.lte(1, 3);\n * // => true\n *\n * _.lte(3, 3);\n * // => true\n *\n * _.lte(3, 1);\n * // => false\n */\n var lte = createRelationalOperation(function(value, other) {\n return value <= other;\n });\n\n /**\n * Converts `value` to an array.\n *\n * @static\n * @since 0.1.0\n * @memberOf _\n * @category Lang\n * @param {*} value The value to convert.\n * @returns {Array} Returns the converted array.\n * @example\n *\n * _.toArray({ 'a': 1, 'b': 2 });\n * // => [1, 2]\n *\n * _.toArray('abc');\n * // => ['a', 'b', 'c']\n *\n * _.toArray(1);\n * // => []\n *\n * _.toArray(null);\n * // => []\n */\n function toArray(value) {\n if (!value) {\n return [];\n }\n if (isArrayLike(value)) {\n return isString(value) ? stringToArray(value) : copyArray(value);\n }\n if (symIterator && value[symIterator]) {\n return iteratorToArray(value[symIterator]());\n }\n var tag = getTag(value),\n func = tag == mapTag ? mapToArray : (tag == setTag ? setToArray : values);\n\n return func(value);\n }\n\n /**\n * Converts `value` to a finite number.\n *\n * @static\n * @memberOf _\n * @since 4.12.0\n * @category Lang\n * @param {*} value The value to convert.\n * @returns {number} Returns the converted number.\n * @example\n *\n * _.toFinite(3.2);\n * // => 3.2\n *\n * _.toFinite(Number.MIN_VALUE);\n * // => 5e-324\n *\n * _.toFinite(Infinity);\n * // => 1.7976931348623157e+308\n *\n * _.toFinite('3.2');\n * // => 3.2\n */\n function toFinite(value) {\n if (!value) {\n return value === 0 ? value : 0;\n }\n value = toNumber(value);\n if (value === INFINITY || value === -INFINITY) {\n var sign = (value < 0 ? -1 : 1);\n return sign * MAX_INTEGER;\n }\n return value === value ? value : 0;\n }\n\n /**\n * Converts `value` to an integer.\n *\n * **Note:** This method is loosely based on\n * [`ToInteger`](http://www.ecma-international.org/ecma-262/7.0/#sec-tointeger).\n *\n * @static\n * @memberOf _\n * @since 4.0.0\n * @category Lang\n * @param {*} value The value to convert.\n * @returns {number} Returns the converted integer.\n * @example\n *\n * _.toInteger(3.2);\n * // => 3\n *\n * _.toInteger(Number.MIN_VALUE);\n * // => 0\n *\n * _.toInteger(Infinity);\n * // => 1.7976931348623157e+308\n *\n * _.toInteger('3.2');\n * // => 3\n */\n function toInteger(value) {\n var result = toFinite(value),\n remainder = result % 1;\n\n return result === result ? (remainder ? result - remainder : result) : 0;\n }\n\n /**\n * Converts `value` to an integer suitable for use as the length of an\n * array-like object.\n *\n * **Note:** This method is based on\n * [`ToLength`](http://ecma-international.org/ecma-262/7.0/#sec-tolength).\n *\n * @static\n * @memberOf _\n * @since 4.0.0\n * @category Lang\n * @param {*} value The value to convert.\n * @returns {number} Returns the converted integer.\n * @example\n *\n * _.toLength(3.2);\n * // => 3\n *\n * _.toLength(Number.MIN_VALUE);\n * // => 0\n *\n * _.toLength(Infinity);\n * // => 4294967295\n *\n * _.toLength('3.2');\n * // => 3\n */\n function toLength(value) {\n return value ? baseClamp(toInteger(value), 0, MAX_ARRAY_LENGTH) : 0;\n }\n\n /**\n * Converts `value` to a number.\n *\n * @static\n * @memberOf _\n * @since 4.0.0\n * @category Lang\n * @param {*} value The value to process.\n * @returns {number} Returns the number.\n * @example\n *\n * _.toNumber(3.2);\n * // => 3.2\n *\n * _.toNumber(Number.MIN_VALUE);\n * // => 5e-324\n *\n * _.toNumber(Infinity);\n * // => Infinity\n *\n * _.toNumber('3.2');\n * // => 3.2\n */\n function toNumber(value) {\n if (typeof value == 'number') {\n return value;\n }\n if (isSymbol(value)) {\n return NAN;\n }\n if (isObject(value)) {\n var other = typeof value.valueOf == 'function' ? value.valueOf() : value;\n value = isObject(other) ? (other + '') : other;\n }\n if (typeof value != 'string') {\n return value === 0 ? value : +value;\n }\n value = value.replace(reTrim, '');\n var isBinary = reIsBinary.test(value);\n return (isBinary || reIsOctal.test(value))\n ? freeParseInt(value.slice(2), isBinary ? 2 : 8)\n : (reIsBadHex.test(value) ? NAN : +value);\n }\n\n /**\n * Converts `value` to a plain object flattening inherited enumerable string\n * keyed properties of `value` to own properties of the plain object.\n *\n * @static\n * @memberOf _\n * @since 3.0.0\n * @category Lang\n * @param {*} value The value to convert.\n * @returns {Object} Returns the converted plain object.\n * @example\n *\n * function Foo() {\n * this.b = 2;\n * }\n *\n * Foo.prototype.c = 3;\n *\n * _.assign({ 'a': 1 }, new Foo);\n * // => { 'a': 1, 'b': 2 }\n *\n * _.assign({ 'a': 1 }, _.toPlainObject(new Foo));\n * // => { 'a': 1, 'b': 2, 'c': 3 }\n */\n function toPlainObject(value) {\n return copyObject(value, keysIn(value));\n }\n\n /**\n * Converts `value` to a safe integer. A safe integer can be compared and\n * represented correctly.\n *\n * @static\n * @memberOf _\n * @since 4.0.0\n * @category Lang\n * @param {*} value The value to convert.\n * @returns {number} Returns the converted integer.\n * @example\n *\n * _.toSafeInteger(3.2);\n * // => 3\n *\n * _.toSafeInteger(Number.MIN_VALUE);\n * // => 0\n *\n * _.toSafeInteger(Infinity);\n * // => 9007199254740991\n *\n * _.toSafeInteger('3.2');\n * // => 3\n */\n function toSafeInteger(value) {\n return value\n ? baseClamp(toInteger(value), -MAX_SAFE_INTEGER, MAX_SAFE_INTEGER)\n : (value === 0 ? value : 0);\n }\n\n /**\n * Converts `value` to a string. An empty string is returned for `null`\n * and `undefined` values. The sign of `-0` is preserved.\n *\n * @static\n * @memberOf _\n * @since 4.0.0\n * @category Lang\n * @param {*} value The value to convert.\n * @returns {string} Returns the converted string.\n * @example\n *\n * _.toString(null);\n * // => ''\n *\n * _.toString(-0);\n * // => '-0'\n *\n * _.toString([1, 2, 3]);\n * // => '1,2,3'\n */\n function toString(value) {\n return value == null ? '' : baseToString(value);\n }\n\n /*------------------------------------------------------------------------*/\n\n /**\n * Assigns own enumerable string keyed properties of source objects to the\n * destination object. Source objects are applied from left to right.\n * Subsequent sources overwrite property assignments of previous sources.\n *\n * **Note:** This method mutates `object` and is loosely based on\n * [`Object.assign`](https://mdn.io/Object/assign).\n *\n * @static\n * @memberOf _\n * @since 0.10.0\n * @category Object\n * @param {Object} object The destination object.\n * @param {...Object} [sources] The source objects.\n * @returns {Object} Returns `object`.\n * @see _.assignIn\n * @example\n *\n * function Foo() {\n * this.a = 1;\n * }\n *\n * function Bar() {\n * this.c = 3;\n * }\n *\n * Foo.prototype.b = 2;\n * Bar.prototype.d = 4;\n *\n * _.assign({ 'a': 0 }, new Foo, new Bar);\n * // => { 'a': 1, 'c': 3 }\n */\n var assign = createAssigner(function(object, source) {\n if (isPrototype(source) || isArrayLike(source)) {\n copyObject(source, keys(source), object);\n return;\n }\n for (var key in source) {\n if (hasOwnProperty.call(source, key)) {\n assignValue(object, key, source[key]);\n }\n }\n });\n\n /**\n * This method is like `_.assign` except that it iterates over own and\n * inherited source properties.\n *\n * **Note:** This method mutates `object`.\n *\n * @static\n * @memberOf _\n * @since 4.0.0\n * @alias extend\n * @category Object\n * @param {Object} object The destination object.\n * @param {...Object} [sources] The source objects.\n * @returns {Object} Returns `object`.\n * @see _.assign\n * @example\n *\n * function Foo() {\n * this.a = 1;\n * }\n *\n * function Bar() {\n * this.c = 3;\n * }\n *\n * Foo.prototype.b = 2;\n * Bar.prototype.d = 4;\n *\n * _.assignIn({ 'a': 0 }, new Foo, new Bar);\n * // => { 'a': 1, 'b': 2, 'c': 3, 'd': 4 }\n */\n var assignIn = createAssigner(function(object, source) {\n copyObject(source, keysIn(source), object);\n });\n\n /**\n * This method is like `_.assignIn` except that it accepts `customizer`\n * which is invoked to produce the assigned values. If `customizer` returns\n * `undefined`, assignment is handled by the method instead. The `customizer`\n * is invoked with five arguments: (objValue, srcValue, key, object, source).\n *\n * **Note:** This method mutates `object`.\n *\n * @static\n * @memberOf _\n * @since 4.0.0\n * @alias extendWith\n * @category Object\n * @param {Object} object The destination object.\n * @param {...Object} sources The source objects.\n * @param {Function} [customizer] The function to customize assigned values.\n * @returns {Object} Returns `object`.\n * @see _.assignWith\n * @example\n *\n * function customizer(objValue, srcValue) {\n * return _.isUndefined(objValue) ? srcValue : objValue;\n * }\n *\n * var defaults = _.partialRight(_.assignInWith, customizer);\n *\n * defaults({ 'a': 1 }, { 'b': 2 }, { 'a': 3 });\n * // => { 'a': 1, 'b': 2 }\n */\n var assignInWith = createAssigner(function(object, source, srcIndex, customizer) {\n copyObject(source, keysIn(source), object, customizer);\n });\n\n /**\n * This method is like `_.assign` except that it accepts `customizer`\n * which is invoked to produce the assigned values. If `customizer` returns\n * `undefined`, assignment is handled by the method instead. The `customizer`\n * is invoked with five arguments: (objValue, srcValue, key, object, source).\n *\n * **Note:** This method mutates `object`.\n *\n * @static\n * @memberOf _\n * @since 4.0.0\n * @category Object\n * @param {Object} object The destination object.\n * @param {...Object} sources The source objects.\n * @param {Function} [customizer] The function to customize assigned values.\n * @returns {Object} Returns `object`.\n * @see _.assignInWith\n * @example\n *\n * function customizer(objValue, srcValue) {\n * return _.isUndefined(objValue) ? srcValue : objValue;\n * }\n *\n * var defaults = _.partialRight(_.assignWith, customizer);\n *\n * defaults({ 'a': 1 }, { 'b': 2 }, { 'a': 3 });\n * // => { 'a': 1, 'b': 2 }\n */\n var assignWith = createAssigner(function(object, source, srcIndex, customizer) {\n copyObject(source, keys(source), object, customizer);\n });\n\n /**\n * Creates an array of values corresponding to `paths` of `object`.\n *\n * @static\n * @memberOf _\n * @since 1.0.0\n * @category Object\n * @param {Object} object The object to iterate over.\n * @param {...(string|string[])} [paths] The property paths to pick.\n * @returns {Array} Returns the picked values.\n * @example\n *\n * var object = { 'a': [{ 'b': { 'c': 3 } }, 4] };\n *\n * _.at(object, ['a[0].b.c', 'a[1]']);\n * // => [3, 4]\n */\n var at = flatRest(baseAt);\n\n /**\n * Creates an object that inherits from the `prototype` object. If a\n * `properties` object is given, its own enumerable string keyed properties\n * are assigned to the created object.\n *\n * @static\n * @memberOf _\n * @since 2.3.0\n * @category Object\n * @param {Object} prototype The object to inherit from.\n * @param {Object} [properties] The properties to assign to the object.\n * @returns {Object} Returns the new object.\n * @example\n *\n * function Shape() {\n * this.x = 0;\n * this.y = 0;\n * }\n *\n * function Circle() {\n * Shape.call(this);\n * }\n *\n * Circle.prototype = _.create(Shape.prototype, {\n * 'constructor': Circle\n * });\n *\n * var circle = new Circle;\n * circle instanceof Circle;\n * // => true\n *\n * circle instanceof Shape;\n * // => true\n */\n function create(prototype, properties) {\n var result = baseCreate(prototype);\n return properties == null ? result : baseAssign(result, properties);\n }\n\n /**\n * Assigns own and inherited enumerable string keyed properties of source\n * objects to the destination object for all destination properties that\n * resolve to `undefined`. Source objects are applied from left to right.\n * Once a property is set, additional values of the same property are ignored.\n *\n * **Note:** This method mutates `object`.\n *\n * @static\n * @since 0.1.0\n * @memberOf _\n * @category Object\n * @param {Object} object The destination object.\n * @param {...Object} [sources] The source objects.\n * @returns {Object} Returns `object`.\n * @see _.defaultsDeep\n * @example\n *\n * _.defaults({ 'a': 1 }, { 'b': 2 }, { 'a': 3 });\n * // => { 'a': 1, 'b': 2 }\n */\n var defaults = baseRest(function(object, sources) {\n object = Object(object);\n\n var index = -1;\n var length = sources.length;\n var guard = length > 2 ? sources[2] : undefined;\n\n if (guard && isIterateeCall(sources[0], sources[1], guard)) {\n length = 1;\n }\n\n while (++index < length) {\n var source = sources[index];\n var props = keysIn(source);\n var propsIndex = -1;\n var propsLength = props.length;\n\n while (++propsIndex < propsLength) {\n var key = props[propsIndex];\n var value = object[key];\n\n if (value === undefined ||\n (eq(value, objectProto[key]) && !hasOwnProperty.call(object, key))) {\n object[key] = source[key];\n }\n }\n }\n\n return object;\n });\n\n /**\n * This method is like `_.defaults` except that it recursively assigns\n * default properties.\n *\n * **Note:** This method mutates `object`.\n *\n * @static\n * @memberOf _\n * @since 3.10.0\n * @category Object\n * @param {Object} object The destination object.\n * @param {...Object} [sources] The source objects.\n * @returns {Object} Returns `object`.\n * @see _.defaults\n * @example\n *\n * _.defaultsDeep({ 'a': { 'b': 2 } }, { 'a': { 'b': 1, 'c': 3 } });\n * // => { 'a': { 'b': 2, 'c': 3 } }\n */\n var defaultsDeep = baseRest(function(args) {\n args.push(undefined, customDefaultsMerge);\n return apply(mergeWith, undefined, args);\n });\n\n /**\n * This method is like `_.find` except that it returns the key of the first\n * element `predicate` returns truthy for instead of the element itself.\n *\n * @static\n * @memberOf _\n * @since 1.1.0\n * @category Object\n * @param {Object} object The object to inspect.\n * @param {Function} [predicate=_.identity] The function invoked per iteration.\n * @returns {string|undefined} Returns the key of the matched element,\n * else `undefined`.\n * @example\n *\n * var users = {\n * 'barney': { 'age': 36, 'active': true },\n * 'fred': { 'age': 40, 'active': false },\n * 'pebbles': { 'age': 1, 'active': true }\n * };\n *\n * _.findKey(users, function(o) { return o.age < 40; });\n * // => 'barney' (iteration order is not guaranteed)\n *\n * // The `_.matches` iteratee shorthand.\n * _.findKey(users, { 'age': 1, 'active': true });\n * // => 'pebbles'\n *\n * // The `_.matchesProperty` iteratee shorthand.\n * _.findKey(users, ['active', false]);\n * // => 'fred'\n *\n * // The `_.property` iteratee shorthand.\n * _.findKey(users, 'active');\n * // => 'barney'\n */\n function findKey(object, predicate) {\n return baseFindKey(object, getIteratee(predicate, 3), baseForOwn);\n }\n\n /**\n * This method is like `_.findKey` except that it iterates over elements of\n * a collection in the opposite order.\n *\n * @static\n * @memberOf _\n * @since 2.0.0\n * @category Object\n * @param {Object} object The object to inspect.\n * @param {Function} [predicate=_.identity] The function invoked per iteration.\n * @returns {string|undefined} Returns the key of the matched element,\n * else `undefined`.\n * @example\n *\n * var users = {\n * 'barney': { 'age': 36, 'active': true },\n * 'fred': { 'age': 40, 'active': false },\n * 'pebbles': { 'age': 1, 'active': true }\n * };\n *\n * _.findLastKey(users, function(o) { return o.age < 40; });\n * // => returns 'pebbles' assuming `_.findKey` returns 'barney'\n *\n * // The `_.matches` iteratee shorthand.\n * _.findLastKey(users, { 'age': 36, 'active': true });\n * // => 'barney'\n *\n * // The `_.matchesProperty` iteratee shorthand.\n * _.findLastKey(users, ['active', false]);\n * // => 'fred'\n *\n * // The `_.property` iteratee shorthand.\n * _.findLastKey(users, 'active');\n * // => 'pebbles'\n */\n function findLastKey(object, predicate) {\n return baseFindKey(object, getIteratee(predicate, 3), baseForOwnRight);\n }\n\n /**\n * Iterates over own and inherited enumerable string keyed properties of an\n * object and invokes `iteratee` for each property. The iteratee is invoked\n * with three arguments: (value, key, object). Iteratee functions may exit\n * iteration early by explicitly returning `false`.\n *\n * @static\n * @memberOf _\n * @since 0.3.0\n * @category Object\n * @param {Object} object The object to iterate over.\n * @param {Function} [iteratee=_.identity] The function invoked per iteration.\n * @returns {Object} Returns `object`.\n * @see _.forInRight\n * @example\n *\n * function Foo() {\n * this.a = 1;\n * this.b = 2;\n * }\n *\n * Foo.prototype.c = 3;\n *\n * _.forIn(new Foo, function(value, key) {\n * console.log(key);\n * });\n * // => Logs 'a', 'b', then 'c' (iteration order is not guaranteed).\n */\n function forIn(object, iteratee) {\n return object == null\n ? object\n : baseFor(object, getIteratee(iteratee, 3), keysIn);\n }\n\n /**\n * This method is like `_.forIn` except that it iterates over properties of\n * `object` in the opposite order.\n *\n * @static\n * @memberOf _\n * @since 2.0.0\n * @category Object\n * @param {Object} object The object to iterate over.\n * @param {Function} [iteratee=_.identity] The function invoked per iteration.\n * @returns {Object} Returns `object`.\n * @see _.forIn\n * @example\n *\n * function Foo() {\n * this.a = 1;\n * this.b = 2;\n * }\n *\n * Foo.prototype.c = 3;\n *\n * _.forInRight(new Foo, function(value, key) {\n * console.log(key);\n * });\n * // => Logs 'c', 'b', then 'a' assuming `_.forIn` logs 'a', 'b', then 'c'.\n */\n function forInRight(object, iteratee) {\n return object == null\n ? object\n : baseForRight(object, getIteratee(iteratee, 3), keysIn);\n }\n\n /**\n * Iterates over own enumerable string keyed properties of an object and\n * invokes `iteratee` for each property. The iteratee is invoked with three\n * arguments: (value, key, object). Iteratee functions may exit iteration\n * early by explicitly returning `false`.\n *\n * @static\n * @memberOf _\n * @since 0.3.0\n * @category Object\n * @param {Object} object The object to iterate over.\n * @param {Function} [iteratee=_.identity] The function invoked per iteration.\n * @returns {Object} Returns `object`.\n * @see _.forOwnRight\n * @example\n *\n * function Foo() {\n * this.a = 1;\n * this.b = 2;\n * }\n *\n * Foo.prototype.c = 3;\n *\n * _.forOwn(new Foo, function(value, key) {\n * console.log(key);\n * });\n * // => Logs 'a' then 'b' (iteration order is not guaranteed).\n */\n function forOwn(object, iteratee) {\n return object && baseForOwn(object, getIteratee(iteratee, 3));\n }\n\n /**\n * This method is like `_.forOwn` except that it iterates over properties of\n * `object` in the opposite order.\n *\n * @static\n * @memberOf _\n * @since 2.0.0\n * @category Object\n * @param {Object} object The object to iterate over.\n * @param {Function} [iteratee=_.identity] The function invoked per iteration.\n * @returns {Object} Returns `object`.\n * @see _.forOwn\n * @example\n *\n * function Foo() {\n * this.a = 1;\n * this.b = 2;\n * }\n *\n * Foo.prototype.c = 3;\n *\n * _.forOwnRight(new Foo, function(value, key) {\n * console.log(key);\n * });\n * // => Logs 'b' then 'a' assuming `_.forOwn` logs 'a' then 'b'.\n */\n function forOwnRight(object, iteratee) {\n return object && baseForOwnRight(object, getIteratee(iteratee, 3));\n }\n\n /**\n * Creates an array of function property names from own enumerable properties\n * of `object`.\n *\n * @static\n * @since 0.1.0\n * @memberOf _\n * @category Object\n * @param {Object} object The object to inspect.\n * @returns {Array} Returns the function names.\n * @see _.functionsIn\n * @example\n *\n * function Foo() {\n * this.a = _.constant('a');\n * this.b = _.constant('b');\n * }\n *\n * Foo.prototype.c = _.constant('c');\n *\n * _.functions(new Foo);\n * // => ['a', 'b']\n */\n function functions(object) {\n return object == null ? [] : baseFunctions(object, keys(object));\n }\n\n /**\n * Creates an array of function property names from own and inherited\n * enumerable properties of `object`.\n *\n * @static\n * @memberOf _\n * @since 4.0.0\n * @category Object\n * @param {Object} object The object to inspect.\n * @returns {Array} Returns the function names.\n * @see _.functions\n * @example\n *\n * function Foo() {\n * this.a = _.constant('a');\n * this.b = _.constant('b');\n * }\n *\n * Foo.prototype.c = _.constant('c');\n *\n * _.functionsIn(new Foo);\n * // => ['a', 'b', 'c']\n */\n function functionsIn(object) {\n return object == null ? [] : baseFunctions(object, keysIn(object));\n }\n\n /**\n * Gets the value at `path` of `object`. If the resolved value is\n * `undefined`, the `defaultValue` is returned in its place.\n *\n * @static\n * @memberOf _\n * @since 3.7.0\n * @category Object\n * @param {Object} object The object to query.\n * @param {Array|string} path The path of the property to get.\n * @param {*} [defaultValue] The value returned for `undefined` resolved values.\n * @returns {*} Returns the resolved value.\n * @example\n *\n * var object = { 'a': [{ 'b': { 'c': 3 } }] };\n *\n * _.get(object, 'a[0].b.c');\n * // => 3\n *\n * _.get(object, ['a', '0', 'b', 'c']);\n * // => 3\n *\n * _.get(object, 'a.b.c', 'default');\n * // => 'default'\n */\n function get(object, path, defaultValue) {\n var result = object == null ? undefined : baseGet(object, path);\n return result === undefined ? defaultValue : result;\n }\n\n /**\n * Checks if `path` is a direct property of `object`.\n *\n * @static\n * @since 0.1.0\n * @memberOf _\n * @category Object\n * @param {Object} object The object to query.\n * @param {Array|string} path The path to check.\n * @returns {boolean} Returns `true` if `path` exists, else `false`.\n * @example\n *\n * var object = { 'a': { 'b': 2 } };\n * var other = _.create({ 'a': _.create({ 'b': 2 }) });\n *\n * _.has(object, 'a');\n * // => true\n *\n * _.has(object, 'a.b');\n * // => true\n *\n * _.has(object, ['a', 'b']);\n * // => true\n *\n * _.has(other, 'a');\n * // => false\n */\n function has(object, path) {\n return object != null && hasPath(object, path, baseHas);\n }\n\n /**\n * Checks if `path` is a direct or inherited property of `object`.\n *\n * @static\n * @memberOf _\n * @since 4.0.0\n * @category Object\n * @param {Object} object The object to query.\n * @param {Array|string} path The path to check.\n * @returns {boolean} Returns `true` if `path` exists, else `false`.\n * @example\n *\n * var object = _.create({ 'a': _.create({ 'b': 2 }) });\n *\n * _.hasIn(object, 'a');\n * // => true\n *\n * _.hasIn(object, 'a.b');\n * // => true\n *\n * _.hasIn(object, ['a', 'b']);\n * // => true\n *\n * _.hasIn(object, 'b');\n * // => false\n */\n function hasIn(object, path) {\n return object != null && hasPath(object, path, baseHasIn);\n }\n\n /**\n * Creates an object composed of the inverted keys and values of `object`.\n * If `object` contains duplicate values, subsequent values overwrite\n * property assignments of previous values.\n *\n * @static\n * @memberOf _\n * @since 0.7.0\n * @category Object\n * @param {Object} object The object to invert.\n * @returns {Object} Returns the new inverted object.\n * @example\n *\n * var object = { 'a': 1, 'b': 2, 'c': 1 };\n *\n * _.invert(object);\n * // => { '1': 'c', '2': 'b' }\n */\n var invert = createInverter(function(result, value, key) {\n if (value != null &&\n typeof value.toString != 'function') {\n value = nativeObjectToString.call(value);\n }\n\n result[value] = key;\n }, constant(identity));\n\n /**\n * This method is like `_.invert` except that the inverted object is generated\n * from the results of running each element of `object` thru `iteratee`. The\n * corresponding inverted value of each inverted key is an array of keys\n * responsible for generating the inverted value. The iteratee is invoked\n * with one argument: (value).\n *\n * @static\n * @memberOf _\n * @since 4.1.0\n * @category Object\n * @param {Object} object The object to invert.\n * @param {Function} [iteratee=_.identity] The iteratee invoked per element.\n * @returns {Object} Returns the new inverted object.\n * @example\n *\n * var object = { 'a': 1, 'b': 2, 'c': 1 };\n *\n * _.invertBy(object);\n * // => { '1': ['a', 'c'], '2': ['b'] }\n *\n * _.invertBy(object, function(value) {\n * return 'group' + value;\n * });\n * // => { 'group1': ['a', 'c'], 'group2': ['b'] }\n */\n var invertBy = createInverter(function(result, value, key) {\n if (value != null &&\n typeof value.toString != 'function') {\n value = nativeObjectToString.call(value);\n }\n\n if (hasOwnProperty.call(result, value)) {\n result[value].push(key);\n } else {\n result[value] = [key];\n }\n }, getIteratee);\n\n /**\n * Invokes the method at `path` of `object`.\n *\n * @static\n * @memberOf _\n * @since 4.0.0\n * @category Object\n * @param {Object} object The object to query.\n * @param {Array|string} path The path of the method to invoke.\n * @param {...*} [args] The arguments to invoke the method with.\n * @returns {*} Returns the result of the invoked method.\n * @example\n *\n * var object = { 'a': [{ 'b': { 'c': [1, 2, 3, 4] } }] };\n *\n * _.invoke(object, 'a[0].b.c.slice', 1, 3);\n * // => [2, 3]\n */\n var invoke = baseRest(baseInvoke);\n\n /**\n * Creates an array of the own enumerable property names of `object`.\n *\n * **Note:** Non-object values are coerced to objects. See the\n * [ES spec](http://ecma-international.org/ecma-262/7.0/#sec-object.keys)\n * for more details.\n *\n * @static\n * @since 0.1.0\n * @memberOf _\n * @category Object\n * @param {Object} object The object to query.\n * @returns {Array} Returns the array of property names.\n * @example\n *\n * function Foo() {\n * this.a = 1;\n * this.b = 2;\n * }\n *\n * Foo.prototype.c = 3;\n *\n * _.keys(new Foo);\n * // => ['a', 'b'] (iteration order is not guaranteed)\n *\n * _.keys('hi');\n * // => ['0', '1']\n */\n function keys(object) {\n return isArrayLike(object) ? arrayLikeKeys(object) : baseKeys(object);\n }\n\n /**\n * Creates an array of the own and inherited enumerable property names of `object`.\n *\n * **Note:** Non-object values are coerced to objects.\n *\n * @static\n * @memberOf _\n * @since 3.0.0\n * @category Object\n * @param {Object} object The object to query.\n * @returns {Array} Returns the array of property names.\n * @example\n *\n * function Foo() {\n * this.a = 1;\n * this.b = 2;\n * }\n *\n * Foo.prototype.c = 3;\n *\n * _.keysIn(new Foo);\n * // => ['a', 'b', 'c'] (iteration order is not guaranteed)\n */\n function keysIn(object) {\n return isArrayLike(object) ? arrayLikeKeys(object, true) : baseKeysIn(object);\n }\n\n /**\n * The opposite of `_.mapValues`; this method creates an object with the\n * same values as `object` and keys generated by running each own enumerable\n * string keyed property of `object` thru `iteratee`. The iteratee is invoked\n * with three arguments: (value, key, object).\n *\n * @static\n * @memberOf _\n * @since 3.8.0\n * @category Object\n * @param {Object} object The object to iterate over.\n * @param {Function} [iteratee=_.identity] The function invoked per iteration.\n * @returns {Object} Returns the new mapped object.\n * @see _.mapValues\n * @example\n *\n * _.mapKeys({ 'a': 1, 'b': 2 }, function(value, key) {\n * return key + value;\n * });\n * // => { 'a1': 1, 'b2': 2 }\n */\n function mapKeys(object, iteratee) {\n var result = {};\n iteratee = getIteratee(iteratee, 3);\n\n baseForOwn(object, function(value, key, object) {\n baseAssignValue(result, iteratee(value, key, object), value);\n });\n return result;\n }\n\n /**\n * Creates an object with the same keys as `object` and values generated\n * by running each own enumerable string keyed property of `object` thru\n * `iteratee`. The iteratee is invoked with three arguments:\n * (value, key, object).\n *\n * @static\n * @memberOf _\n * @since 2.4.0\n * @category Object\n * @param {Object} object The object to iterate over.\n * @param {Function} [iteratee=_.identity] The function invoked per iteration.\n * @returns {Object} Returns the new mapped object.\n * @see _.mapKeys\n * @example\n *\n * var users = {\n * 'fred': { 'user': 'fred', 'age': 40 },\n * 'pebbles': { 'user': 'pebbles', 'age': 1 }\n * };\n *\n * _.mapValues(users, function(o) { return o.age; });\n * // => { 'fred': 40, 'pebbles': 1 } (iteration order is not guaranteed)\n *\n * // The `_.property` iteratee shorthand.\n * _.mapValues(users, 'age');\n * // => { 'fred': 40, 'pebbles': 1 } (iteration order is not guaranteed)\n */\n function mapValues(object, iteratee) {\n var result = {};\n iteratee = getIteratee(iteratee, 3);\n\n baseForOwn(object, function(value, key, object) {\n baseAssignValue(result, key, iteratee(value, key, object));\n });\n return result;\n }\n\n /**\n * This method is like `_.assign` except that it recursively merges own and\n * inherited enumerable string keyed properties of source objects into the\n * destination object. Source properties that resolve to `undefined` are\n * skipped if a destination value exists. Array and plain object properties\n * are merged recursively. Other objects and value types are overridden by\n * assignment. Source objects are applied from left to right. Subsequent\n * sources overwrite property assignments of previous sources.\n *\n * **Note:** This method mutates `object`.\n *\n * @static\n * @memberOf _\n * @since 0.5.0\n * @category Object\n * @param {Object} object The destination object.\n * @param {...Object} [sources] The source objects.\n * @returns {Object} Returns `object`.\n * @example\n *\n * var object = {\n * 'a': [{ 'b': 2 }, { 'd': 4 }]\n * };\n *\n * var other = {\n * 'a': [{ 'c': 3 }, { 'e': 5 }]\n * };\n *\n * _.merge(object, other);\n * // => { 'a': [{ 'b': 2, 'c': 3 }, { 'd': 4, 'e': 5 }] }\n */\n var merge = createAssigner(function(object, source, srcIndex) {\n baseMerge(object, source, srcIndex);\n });\n\n /**\n * This method is like `_.merge` except that it accepts `customizer` which\n * is invoked to produce the merged values of the destination and source\n * properties. If `customizer` returns `undefined`, merging is handled by the\n * method instead. The `customizer` is invoked with six arguments:\n * (objValue, srcValue, key, object, source, stack).\n *\n * **Note:** This method mutates `object`.\n *\n * @static\n * @memberOf _\n * @since 4.0.0\n * @category Object\n * @param {Object} object The destination object.\n * @param {...Object} sources The source objects.\n * @param {Function} customizer The function to customize assigned values.\n * @returns {Object} Returns `object`.\n * @example\n *\n * function customizer(objValue, srcValue) {\n * if (_.isArray(objValue)) {\n * return objValue.concat(srcValue);\n * }\n * }\n *\n * var object = { 'a': [1], 'b': [2] };\n * var other = { 'a': [3], 'b': [4] };\n *\n * _.mergeWith(object, other, customizer);\n * // => { 'a': [1, 3], 'b': [2, 4] }\n */\n var mergeWith = createAssigner(function(object, source, srcIndex, customizer) {\n baseMerge(object, source, srcIndex, customizer);\n });\n\n /**\n * The opposite of `_.pick`; this method creates an object composed of the\n * own and inherited enumerable property paths of `object` that are not omitted.\n *\n * **Note:** This method is considerably slower than `_.pick`.\n *\n * @static\n * @since 0.1.0\n * @memberOf _\n * @category Object\n * @param {Object} object The source object.\n * @param {...(string|string[])} [paths] The property paths to omit.\n * @returns {Object} Returns the new object.\n * @example\n *\n * var object = { 'a': 1, 'b': '2', 'c': 3 };\n *\n * _.omit(object, ['a', 'c']);\n * // => { 'b': '2' }\n */\n var omit = flatRest(function(object, paths) {\n var result = {};\n if (object == null) {\n return result;\n }\n var isDeep = false;\n paths = arrayMap(paths, function(path) {\n path = castPath(path, object);\n isDeep || (isDeep = path.length > 1);\n return path;\n });\n copyObject(object, getAllKeysIn(object), result);\n if (isDeep) {\n result = baseClone(result, CLONE_DEEP_FLAG | CLONE_FLAT_FLAG | CLONE_SYMBOLS_FLAG, customOmitClone);\n }\n var length = paths.length;\n while (length--) {\n baseUnset(result, paths[length]);\n }\n return result;\n });\n\n /**\n * The opposite of `_.pickBy`; this method creates an object composed of\n * the own and inherited enumerable string keyed properties of `object` that\n * `predicate` doesn't return truthy for. The predicate is invoked with two\n * arguments: (value, key).\n *\n * @static\n * @memberOf _\n * @since 4.0.0\n * @category Object\n * @param {Object} object The source object.\n * @param {Function} [predicate=_.identity] The function invoked per property.\n * @returns {Object} Returns the new object.\n * @example\n *\n * var object = { 'a': 1, 'b': '2', 'c': 3 };\n *\n * _.omitBy(object, _.isNumber);\n * // => { 'b': '2' }\n */\n function omitBy(object, predicate) {\n return pickBy(object, negate(getIteratee(predicate)));\n }\n\n /**\n * Creates an object composed of the picked `object` properties.\n *\n * @static\n * @since 0.1.0\n * @memberOf _\n * @category Object\n * @param {Object} object The source object.\n * @param {...(string|string[])} [paths] The property paths to pick.\n * @returns {Object} Returns the new object.\n * @example\n *\n * var object = { 'a': 1, 'b': '2', 'c': 3 };\n *\n * _.pick(object, ['a', 'c']);\n * // => { 'a': 1, 'c': 3 }\n */\n var pick = flatRest(function(object, paths) {\n return object == null ? {} : basePick(object, paths);\n });\n\n /**\n * Creates an object composed of the `object` properties `predicate` returns\n * truthy for. The predicate is invoked with two arguments: (value, key).\n *\n * @static\n * @memberOf _\n * @since 4.0.0\n * @category Object\n * @param {Object} object The source object.\n * @param {Function} [predicate=_.identity] The function invoked per property.\n * @returns {Object} Returns the new object.\n * @example\n *\n * var object = { 'a': 1, 'b': '2', 'c': 3 };\n *\n * _.pickBy(object, _.isNumber);\n * // => { 'a': 1, 'c': 3 }\n */\n function pickBy(object, predicate) {\n if (object == null) {\n return {};\n }\n var props = arrayMap(getAllKeysIn(object), function(prop) {\n return [prop];\n });\n predicate = getIteratee(predicate);\n return basePickBy(object, props, function(value, path) {\n return predicate(value, path[0]);\n });\n }\n\n /**\n * This method is like `_.get` except that if the resolved value is a\n * function it's invoked with the `this` binding of its parent object and\n * its result is returned.\n *\n * @static\n * @since 0.1.0\n * @memberOf _\n * @category Object\n * @param {Object} object The object to query.\n * @param {Array|string} path The path of the property to resolve.\n * @param {*} [defaultValue] The value returned for `undefined` resolved values.\n * @returns {*} Returns the resolved value.\n * @example\n *\n * var object = { 'a': [{ 'b': { 'c1': 3, 'c2': _.constant(4) } }] };\n *\n * _.result(object, 'a[0].b.c1');\n * // => 3\n *\n * _.result(object, 'a[0].b.c2');\n * // => 4\n *\n * _.result(object, 'a[0].b.c3', 'default');\n * // => 'default'\n *\n * _.result(object, 'a[0].b.c3', _.constant('default'));\n * // => 'default'\n */\n function result(object, path, defaultValue) {\n path = castPath(path, object);\n\n var index = -1,\n length = path.length;\n\n // Ensure the loop is entered when path is empty.\n if (!length) {\n length = 1;\n object = undefined;\n }\n while (++index < length) {\n var value = object == null ? undefined : object[toKey(path[index])];\n if (value === undefined) {\n index = length;\n value = defaultValue;\n }\n object = isFunction(value) ? value.call(object) : value;\n }\n return object;\n }\n\n /**\n * Sets the value at `path` of `object`. If a portion of `path` doesn't exist,\n * it's created. Arrays are created for missing index properties while objects\n * are created for all other missing properties. Use `_.setWith` to customize\n * `path` creation.\n *\n * **Note:** This method mutates `object`.\n *\n * @static\n * @memberOf _\n * @since 3.7.0\n * @category Object\n * @param {Object} object The object to modify.\n * @param {Array|string} path The path of the property to set.\n * @param {*} value The value to set.\n * @returns {Object} Returns `object`.\n * @example\n *\n * var object = { 'a': [{ 'b': { 'c': 3 } }] };\n *\n * _.set(object, 'a[0].b.c', 4);\n * console.log(object.a[0].b.c);\n * // => 4\n *\n * _.set(object, ['x', '0', 'y', 'z'], 5);\n * console.log(object.x[0].y.z);\n * // => 5\n */\n function set(object, path, value) {\n return object == null ? object : baseSet(object, path, value);\n }\n\n /**\n * This method is like `_.set` except that it accepts `customizer` which is\n * invoked to produce the objects of `path`. If `customizer` returns `undefined`\n * path creation is handled by the method instead. The `customizer` is invoked\n * with three arguments: (nsValue, key, nsObject).\n *\n * **Note:** This method mutates `object`.\n *\n * @static\n * @memberOf _\n * @since 4.0.0\n * @category Object\n * @param {Object} object The object to modify.\n * @param {Array|string} path The path of the property to set.\n * @param {*} value The value to set.\n * @param {Function} [customizer] The function to customize assigned values.\n * @returns {Object} Returns `object`.\n * @example\n *\n * var object = {};\n *\n * _.setWith(object, '[0][1]', 'a', Object);\n * // => { '0': { '1': 'a' } }\n */\n function setWith(object, path, value, customizer) {\n customizer = typeof customizer == 'function' ? customizer : undefined;\n return object == null ? object : baseSet(object, path, value, customizer);\n }\n\n /**\n * Creates an array of own enumerable string keyed-value pairs for `object`\n * which can be consumed by `_.fromPairs`. If `object` is a map or set, its\n * entries are returned.\n *\n * @static\n * @memberOf _\n * @since 4.0.0\n * @alias entries\n * @category Object\n * @param {Object} object The object to query.\n * @returns {Array} Returns the key-value pairs.\n * @example\n *\n * function Foo() {\n * this.a = 1;\n * this.b = 2;\n * }\n *\n * Foo.prototype.c = 3;\n *\n * _.toPairs(new Foo);\n * // => [['a', 1], ['b', 2]] (iteration order is not guaranteed)\n */\n var toPairs = createToPairs(keys);\n\n /**\n * Creates an array of own and inherited enumerable string keyed-value pairs\n * for `object` which can be consumed by `_.fromPairs`. If `object` is a map\n * or set, its entries are returned.\n *\n * @static\n * @memberOf _\n * @since 4.0.0\n * @alias entriesIn\n * @category Object\n * @param {Object} object The object to query.\n * @returns {Array} Returns the key-value pairs.\n * @example\n *\n * function Foo() {\n * this.a = 1;\n * this.b = 2;\n * }\n *\n * Foo.prototype.c = 3;\n *\n * _.toPairsIn(new Foo);\n * // => [['a', 1], ['b', 2], ['c', 3]] (iteration order is not guaranteed)\n */\n var toPairsIn = createToPairs(keysIn);\n\n /**\n * An alternative to `_.reduce`; this method transforms `object` to a new\n * `accumulator` object which is the result of running each of its own\n * enumerable string keyed properties thru `iteratee`, with each invocation\n * potentially mutating the `accumulator` object. If `accumulator` is not\n * provided, a new object with the same `[[Prototype]]` will be used. The\n * iteratee is invoked with four arguments: (accumulator, value, key, object).\n * Iteratee functions may exit iteration early by explicitly returning `false`.\n *\n * @static\n * @memberOf _\n * @since 1.3.0\n * @category Object\n * @param {Object} object The object to iterate over.\n * @param {Function} [iteratee=_.identity] The function invoked per iteration.\n * @param {*} [accumulator] The custom accumulator value.\n * @returns {*} Returns the accumulated value.\n * @example\n *\n * _.transform([2, 3, 4], function(result, n) {\n * result.push(n *= n);\n * return n % 2 == 0;\n * }, []);\n * // => [4, 9]\n *\n * _.transform({ 'a': 1, 'b': 2, 'c': 1 }, function(result, value, key) {\n * (result[value] || (result[value] = [])).push(key);\n * }, {});\n * // => { '1': ['a', 'c'], '2': ['b'] }\n */\n function transform(object, iteratee, accumulator) {\n var isArr = isArray(object),\n isArrLike = isArr || isBuffer(object) || isTypedArray(object);\n\n iteratee = getIteratee(iteratee, 4);\n if (accumulator == null) {\n var Ctor = object && object.constructor;\n if (isArrLike) {\n accumulator = isArr ? new Ctor : [];\n }\n else if (isObject(object)) {\n accumulator = isFunction(Ctor) ? baseCreate(getPrototype(object)) : {};\n }\n else {\n accumulator = {};\n }\n }\n (isArrLike ? arrayEach : baseForOwn)(object, function(value, index, object) {\n return iteratee(accumulator, value, index, object);\n });\n return accumulator;\n }\n\n /**\n * Removes the property at `path` of `object`.\n *\n * **Note:** This method mutates `object`.\n *\n * @static\n * @memberOf _\n * @since 4.0.0\n * @category Object\n * @param {Object} object The object to modify.\n * @param {Array|string} path The path of the property to unset.\n * @returns {boolean} Returns `true` if the property is deleted, else `false`.\n * @example\n *\n * var object = { 'a': [{ 'b': { 'c': 7 } }] };\n * _.unset(object, 'a[0].b.c');\n * // => true\n *\n * console.log(object);\n * // => { 'a': [{ 'b': {} }] };\n *\n * _.unset(object, ['a', '0', 'b', 'c']);\n * // => true\n *\n * console.log(object);\n * // => { 'a': [{ 'b': {} }] };\n */\n function unset(object, path) {\n return object == null ? true : baseUnset(object, path);\n }\n\n /**\n * This method is like `_.set` except that accepts `updater` to produce the\n * value to set. Use `_.updateWith` to customize `path` creation. The `updater`\n * is invoked with one argument: (value).\n *\n * **Note:** This method mutates `object`.\n *\n * @static\n * @memberOf _\n * @since 4.6.0\n * @category Object\n * @param {Object} object The object to modify.\n * @param {Array|string} path The path of the property to set.\n * @param {Function} updater The function to produce the updated value.\n * @returns {Object} Returns `object`.\n * @example\n *\n * var object = { 'a': [{ 'b': { 'c': 3 } }] };\n *\n * _.update(object, 'a[0].b.c', function(n) { return n * n; });\n * console.log(object.a[0].b.c);\n * // => 9\n *\n * _.update(object, 'x[0].y.z', function(n) { return n ? n + 1 : 0; });\n * console.log(object.x[0].y.z);\n * // => 0\n */\n function update(object, path, updater) {\n return object == null ? object : baseUpdate(object, path, castFunction(updater));\n }\n\n /**\n * This method is like `_.update` except that it accepts `customizer` which is\n * invoked to produce the objects of `path`. If `customizer` returns `undefined`\n * path creation is handled by the method instead. The `customizer` is invoked\n * with three arguments: (nsValue, key, nsObject).\n *\n * **Note:** This method mutates `object`.\n *\n * @static\n * @memberOf _\n * @since 4.6.0\n * @category Object\n * @param {Object} object The object to modify.\n * @param {Array|string} path The path of the property to set.\n * @param {Function} updater The function to produce the updated value.\n * @param {Function} [customizer] The function to customize assigned values.\n * @returns {Object} Returns `object`.\n * @example\n *\n * var object = {};\n *\n * _.updateWith(object, '[0][1]', _.constant('a'), Object);\n * // => { '0': { '1': 'a' } }\n */\n function updateWith(object, path, updater, customizer) {\n customizer = typeof customizer == 'function' ? customizer : undefined;\n return object == null ? object : baseUpdate(object, path, castFunction(updater), customizer);\n }\n\n /**\n * Creates an array of the own enumerable string keyed property values of `object`.\n *\n * **Note:** Non-object values are coerced to objects.\n *\n * @static\n * @since 0.1.0\n * @memberOf _\n * @category Object\n * @param {Object} object The object to query.\n * @returns {Array} Returns the array of property values.\n * @example\n *\n * function Foo() {\n * this.a = 1;\n * this.b = 2;\n * }\n *\n * Foo.prototype.c = 3;\n *\n * _.values(new Foo);\n * // => [1, 2] (iteration order is not guaranteed)\n *\n * _.values('hi');\n * // => ['h', 'i']\n */\n function values(object) {\n return object == null ? [] : baseValues(object, keys(object));\n }\n\n /**\n * Creates an array of the own and inherited enumerable string keyed property\n * values of `object`.\n *\n * **Note:** Non-object values are coerced to objects.\n *\n * @static\n * @memberOf _\n * @since 3.0.0\n * @category Object\n * @param {Object} object The object to query.\n * @returns {Array} Returns the array of property values.\n * @example\n *\n * function Foo() {\n * this.a = 1;\n * this.b = 2;\n * }\n *\n * Foo.prototype.c = 3;\n *\n * _.valuesIn(new Foo);\n * // => [1, 2, 3] (iteration order is not guaranteed)\n */\n function valuesIn(object) {\n return object == null ? [] : baseValues(object, keysIn(object));\n }\n\n /*------------------------------------------------------------------------*/\n\n /**\n * Clamps `number` within the inclusive `lower` and `upper` bounds.\n *\n * @static\n * @memberOf _\n * @since 4.0.0\n * @category Number\n * @param {number} number The number to clamp.\n * @param {number} [lower] The lower bound.\n * @param {number} upper The upper bound.\n * @returns {number} Returns the clamped number.\n * @example\n *\n * _.clamp(-10, -5, 5);\n * // => -5\n *\n * _.clamp(10, -5, 5);\n * // => 5\n */\n function clamp(number, lower, upper) {\n if (upper === undefined) {\n upper = lower;\n lower = undefined;\n }\n if (upper !== undefined) {\n upper = toNumber(upper);\n upper = upper === upper ? upper : 0;\n }\n if (lower !== undefined) {\n lower = toNumber(lower);\n lower = lower === lower ? lower : 0;\n }\n return baseClamp(toNumber(number), lower, upper);\n }\n\n /**\n * Checks if `n` is between `start` and up to, but not including, `end`. If\n * `end` is not specified, it's set to `start` with `start` then set to `0`.\n * If `start` is greater than `end` the params are swapped to support\n * negative ranges.\n *\n * @static\n * @memberOf _\n * @since 3.3.0\n * @category Number\n * @param {number} number The number to check.\n * @param {number} [start=0] The start of the range.\n * @param {number} end The end of the range.\n * @returns {boolean} Returns `true` if `number` is in the range, else `false`.\n * @see _.range, _.rangeRight\n * @example\n *\n * _.inRange(3, 2, 4);\n * // => true\n *\n * _.inRange(4, 8);\n * // => true\n *\n * _.inRange(4, 2);\n * // => false\n *\n * _.inRange(2, 2);\n * // => false\n *\n * _.inRange(1.2, 2);\n * // => true\n *\n * _.inRange(5.2, 4);\n * // => false\n *\n * _.inRange(-3, -2, -6);\n * // => true\n */\n function inRange(number, start, end) {\n start = toFinite(start);\n if (end === undefined) {\n end = start;\n start = 0;\n } else {\n end = toFinite(end);\n }\n number = toNumber(number);\n return baseInRange(number, start, end);\n }\n\n /**\n * Produces a random number between the inclusive `lower` and `upper` bounds.\n * If only one argument is provided a number between `0` and the given number\n * is returned. If `floating` is `true`, or either `lower` or `upper` are\n * floats, a floating-point number is returned instead of an integer.\n *\n * **Note:** JavaScript follows the IEEE-754 standard for resolving\n * floating-point values which can produce unexpected results.\n *\n * @static\n * @memberOf _\n * @since 0.7.0\n * @category Number\n * @param {number} [lower=0] The lower bound.\n * @param {number} [upper=1] The upper bound.\n * @param {boolean} [floating] Specify returning a floating-point number.\n * @returns {number} Returns the random number.\n * @example\n *\n * _.random(0, 5);\n * // => an integer between 0 and 5\n *\n * _.random(5);\n * // => also an integer between 0 and 5\n *\n * _.random(5, true);\n * // => a floating-point number between 0 and 5\n *\n * _.random(1.2, 5.2);\n * // => a floating-point number between 1.2 and 5.2\n */\n function random(lower, upper, floating) {\n if (floating && typeof floating != 'boolean' && isIterateeCall(lower, upper, floating)) {\n upper = floating = undefined;\n }\n if (floating === undefined) {\n if (typeof upper == 'boolean') {\n floating = upper;\n upper = undefined;\n }\n else if (typeof lower == 'boolean') {\n floating = lower;\n lower = undefined;\n }\n }\n if (lower === undefined && upper === undefined) {\n lower = 0;\n upper = 1;\n }\n else {\n lower = toFinite(lower);\n if (upper === undefined) {\n upper = lower;\n lower = 0;\n } else {\n upper = toFinite(upper);\n }\n }\n if (lower > upper) {\n var temp = lower;\n lower = upper;\n upper = temp;\n }\n if (floating || lower % 1 || upper % 1) {\n var rand = nativeRandom();\n return nativeMin(lower + (rand * (upper - lower + freeParseFloat('1e-' + ((rand + '').length - 1)))), upper);\n }\n return baseRandom(lower, upper);\n }\n\n /*------------------------------------------------------------------------*/\n\n /**\n * Converts `string` to [camel case](https://en.wikipedia.org/wiki/CamelCase).\n *\n * @static\n * @memberOf _\n * @since 3.0.0\n * @category String\n * @param {string} [string=''] The string to convert.\n * @returns {string} Returns the camel cased string.\n * @example\n *\n * _.camelCase('Foo Bar');\n * // => 'fooBar'\n *\n * _.camelCase('--foo-bar--');\n * // => 'fooBar'\n *\n * _.camelCase('__FOO_BAR__');\n * // => 'fooBar'\n */\n var camelCase = createCompounder(function(result, word, index) {\n word = word.toLowerCase();\n return result + (index ? capitalize(word) : word);\n });\n\n /**\n * Converts the first character of `string` to upper case and the remaining\n * to lower case.\n *\n * @static\n * @memberOf _\n * @since 3.0.0\n * @category String\n * @param {string} [string=''] The string to capitalize.\n * @returns {string} Returns the capitalized string.\n * @example\n *\n * _.capitalize('FRED');\n * // => 'Fred'\n */\n function capitalize(string) {\n return upperFirst(toString(string).toLowerCase());\n }\n\n /**\n * Deburrs `string` by converting\n * [Latin-1 Supplement](https://en.wikipedia.org/wiki/Latin-1_Supplement_(Unicode_block)#Character_table)\n * and [Latin Extended-A](https://en.wikipedia.org/wiki/Latin_Extended-A)\n * letters to basic Latin letters and removing\n * [combining diacritical marks](https://en.wikipedia.org/wiki/Combining_Diacritical_Marks).\n *\n * @static\n * @memberOf _\n * @since 3.0.0\n * @category String\n * @param {string} [string=''] The string to deburr.\n * @returns {string} Returns the deburred string.\n * @example\n *\n * _.deburr('déjà vu');\n * // => 'deja vu'\n */\n function deburr(string) {\n string = toString(string);\n return string && string.replace(reLatin, deburrLetter).replace(reComboMark, '');\n }\n\n /**\n * Checks if `string` ends with the given target string.\n *\n * @static\n * @memberOf _\n * @since 3.0.0\n * @category String\n * @param {string} [string=''] The string to inspect.\n * @param {string} [target] The string to search for.\n * @param {number} [position=string.length] The position to search up to.\n * @returns {boolean} Returns `true` if `string` ends with `target`,\n * else `false`.\n * @example\n *\n * _.endsWith('abc', 'c');\n * // => true\n *\n * _.endsWith('abc', 'b');\n * // => false\n *\n * _.endsWith('abc', 'b', 2);\n * // => true\n */\n function endsWith(string, target, position) {\n string = toString(string);\n target = baseToString(target);\n\n var length = string.length;\n position = position === undefined\n ? length\n : baseClamp(toInteger(position), 0, length);\n\n var end = position;\n position -= target.length;\n return position >= 0 && string.slice(position, end) == target;\n }\n\n /**\n * Converts the characters \"&\", \"<\", \">\", '\"', and \"'\" in `string` to their\n * corresponding HTML entities.\n *\n * **Note:** No other characters are escaped. To escape additional\n * characters use a third-party library like [_he_](https://mths.be/he).\n *\n * Though the \">\" character is escaped for symmetry, characters like\n * \">\" and \"/\" don't need escaping in HTML and have no special meaning\n * unless they're part of a tag or unquoted attribute value. See\n * [Mathias Bynens's article](https://mathiasbynens.be/notes/ambiguous-ampersands)\n * (under \"semi-related fun fact\") for more details.\n *\n * When working with HTML you should always\n * [quote attribute values](http://wonko.com/post/html-escaping) to reduce\n * XSS vectors.\n *\n * @static\n * @since 0.1.0\n * @memberOf _\n * @category String\n * @param {string} [string=''] The string to escape.\n * @returns {string} Returns the escaped string.\n * @example\n *\n * _.escape('fred, barney, & pebbles');\n * // => 'fred, barney, & pebbles'\n */\n function escape(string) {\n string = toString(string);\n return (string && reHasUnescapedHtml.test(string))\n ? string.replace(reUnescapedHtml, escapeHtmlChar)\n : string;\n }\n\n /**\n * Escapes the `RegExp` special characters \"^\", \"$\", \"\\\", \".\", \"*\", \"+\",\n * \"?\", \"(\", \")\", \"[\", \"]\", \"{\", \"}\", and \"|\" in `string`.\n *\n * @static\n * @memberOf _\n * @since 3.0.0\n * @category String\n * @param {string} [string=''] The string to escape.\n * @returns {string} Returns the escaped string.\n * @example\n *\n * _.escapeRegExp('[lodash](https://lodash.com/)');\n * // => '\\[lodash\\]\\(https://lodash\\.com/\\)'\n */\n function escapeRegExp(string) {\n string = toString(string);\n return (string && reHasRegExpChar.test(string))\n ? string.replace(reRegExpChar, '\\\\$&')\n : string;\n }\n\n /**\n * Converts `string` to\n * [kebab case](https://en.wikipedia.org/wiki/Letter_case#Special_case_styles).\n *\n * @static\n * @memberOf _\n * @since 3.0.0\n * @category String\n * @param {string} [string=''] The string to convert.\n * @returns {string} Returns the kebab cased string.\n * @example\n *\n * _.kebabCase('Foo Bar');\n * // => 'foo-bar'\n *\n * _.kebabCase('fooBar');\n * // => 'foo-bar'\n *\n * _.kebabCase('__FOO_BAR__');\n * // => 'foo-bar'\n */\n var kebabCase = createCompounder(function(result, word, index) {\n return result + (index ? '-' : '') + word.toLowerCase();\n });\n\n /**\n * Converts `string`, as space separated words, to lower case.\n *\n * @static\n * @memberOf _\n * @since 4.0.0\n * @category String\n * @param {string} [string=''] The string to convert.\n * @returns {string} Returns the lower cased string.\n * @example\n *\n * _.lowerCase('--Foo-Bar--');\n * // => 'foo bar'\n *\n * _.lowerCase('fooBar');\n * // => 'foo bar'\n *\n * _.lowerCase('__FOO_BAR__');\n * // => 'foo bar'\n */\n var lowerCase = createCompounder(function(result, word, index) {\n return result + (index ? ' ' : '') + word.toLowerCase();\n });\n\n /**\n * Converts the first character of `string` to lower case.\n *\n * @static\n * @memberOf _\n * @since 4.0.0\n * @category String\n * @param {string} [string=''] The string to convert.\n * @returns {string} Returns the converted string.\n * @example\n *\n * _.lowerFirst('Fred');\n * // => 'fred'\n *\n * _.lowerFirst('FRED');\n * // => 'fRED'\n */\n var lowerFirst = createCaseFirst('toLowerCase');\n\n /**\n * Pads `string` on the left and right sides if it's shorter than `length`.\n * Padding characters are truncated if they can't be evenly divided by `length`.\n *\n * @static\n * @memberOf _\n * @since 3.0.0\n * @category String\n * @param {string} [string=''] The string to pad.\n * @param {number} [length=0] The padding length.\n * @param {string} [chars=' '] The string used as padding.\n * @returns {string} Returns the padded string.\n * @example\n *\n * _.pad('abc', 8);\n * // => ' abc '\n *\n * _.pad('abc', 8, '_-');\n * // => '_-abc_-_'\n *\n * _.pad('abc', 3);\n * // => 'abc'\n */\n function pad(string, length, chars) {\n string = toString(string);\n length = toInteger(length);\n\n var strLength = length ? stringSize(string) : 0;\n if (!length || strLength >= length) {\n return string;\n }\n var mid = (length - strLength) / 2;\n return (\n createPadding(nativeFloor(mid), chars) +\n string +\n createPadding(nativeCeil(mid), chars)\n );\n }\n\n /**\n * Pads `string` on the right side if it's shorter than `length`. Padding\n * characters are truncated if they exceed `length`.\n *\n * @static\n * @memberOf _\n * @since 4.0.0\n * @category String\n * @param {string} [string=''] The string to pad.\n * @param {number} [length=0] The padding length.\n * @param {string} [chars=' '] The string used as padding.\n * @returns {string} Returns the padded string.\n * @example\n *\n * _.padEnd('abc', 6);\n * // => 'abc '\n *\n * _.padEnd('abc', 6, '_-');\n * // => 'abc_-_'\n *\n * _.padEnd('abc', 3);\n * // => 'abc'\n */\n function padEnd(string, length, chars) {\n string = toString(string);\n length = toInteger(length);\n\n var strLength = length ? stringSize(string) : 0;\n return (length && strLength < length)\n ? (string + createPadding(length - strLength, chars))\n : string;\n }\n\n /**\n * Pads `string` on the left side if it's shorter than `length`. Padding\n * characters are truncated if they exceed `length`.\n *\n * @static\n * @memberOf _\n * @since 4.0.0\n * @category String\n * @param {string} [string=''] The string to pad.\n * @param {number} [length=0] The padding length.\n * @param {string} [chars=' '] The string used as padding.\n * @returns {string} Returns the padded string.\n * @example\n *\n * _.padStart('abc', 6);\n * // => ' abc'\n *\n * _.padStart('abc', 6, '_-');\n * // => '_-_abc'\n *\n * _.padStart('abc', 3);\n * // => 'abc'\n */\n function padStart(string, length, chars) {\n string = toString(string);\n length = toInteger(length);\n\n var strLength = length ? stringSize(string) : 0;\n return (length && strLength < length)\n ? (createPadding(length - strLength, chars) + string)\n : string;\n }\n\n /**\n * Converts `string` to an integer of the specified radix. If `radix` is\n * `undefined` or `0`, a `radix` of `10` is used unless `value` is a\n * hexadecimal, in which case a `radix` of `16` is used.\n *\n * **Note:** This method aligns with the\n * [ES5 implementation](https://es5.github.io/#x15.1.2.2) of `parseInt`.\n *\n * @static\n * @memberOf _\n * @since 1.1.0\n * @category String\n * @param {string} string The string to convert.\n * @param {number} [radix=10] The radix to interpret `value` by.\n * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.\n * @returns {number} Returns the converted integer.\n * @example\n *\n * _.parseInt('08');\n * // => 8\n *\n * _.map(['6', '08', '10'], _.parseInt);\n * // => [6, 8, 10]\n */\n function parseInt(string, radix, guard) {\n if (guard || radix == null) {\n radix = 0;\n } else if (radix) {\n radix = +radix;\n }\n return nativeParseInt(toString(string).replace(reTrimStart, ''), radix || 0);\n }\n\n /**\n * Repeats the given string `n` times.\n *\n * @static\n * @memberOf _\n * @since 3.0.0\n * @category String\n * @param {string} [string=''] The string to repeat.\n * @param {number} [n=1] The number of times to repeat the string.\n * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.\n * @returns {string} Returns the repeated string.\n * @example\n *\n * _.repeat('*', 3);\n * // => '***'\n *\n * _.repeat('abc', 2);\n * // => 'abcabc'\n *\n * _.repeat('abc', 0);\n * // => ''\n */\n function repeat(string, n, guard) {\n if ((guard ? isIterateeCall(string, n, guard) : n === undefined)) {\n n = 1;\n } else {\n n = toInteger(n);\n }\n return baseRepeat(toString(string), n);\n }\n\n /**\n * Replaces matches for `pattern` in `string` with `replacement`.\n *\n * **Note:** This method is based on\n * [`String#replace`](https://mdn.io/String/replace).\n *\n * @static\n * @memberOf _\n * @since 4.0.0\n * @category String\n * @param {string} [string=''] The string to modify.\n * @param {RegExp|string} pattern The pattern to replace.\n * @param {Function|string} replacement The match replacement.\n * @returns {string} Returns the modified string.\n * @example\n *\n * _.replace('Hi Fred', 'Fred', 'Barney');\n * // => 'Hi Barney'\n */\n function replace() {\n var args = arguments,\n string = toString(args[0]);\n\n return args.length < 3 ? string : string.replace(args[1], args[2]);\n }\n\n /**\n * Converts `string` to\n * [snake case](https://en.wikipedia.org/wiki/Snake_case).\n *\n * @static\n * @memberOf _\n * @since 3.0.0\n * @category String\n * @param {string} [string=''] The string to convert.\n * @returns {string} Returns the snake cased string.\n * @example\n *\n * _.snakeCase('Foo Bar');\n * // => 'foo_bar'\n *\n * _.snakeCase('fooBar');\n * // => 'foo_bar'\n *\n * _.snakeCase('--FOO-BAR--');\n * // => 'foo_bar'\n */\n var snakeCase = createCompounder(function(result, word, index) {\n return result + (index ? '_' : '') + word.toLowerCase();\n });\n\n /**\n * Splits `string` by `separator`.\n *\n * **Note:** This method is based on\n * [`String#split`](https://mdn.io/String/split).\n *\n * @static\n * @memberOf _\n * @since 4.0.0\n * @category String\n * @param {string} [string=''] The string to split.\n * @param {RegExp|string} separator The separator pattern to split by.\n * @param {number} [limit] The length to truncate results to.\n * @returns {Array} Returns the string segments.\n * @example\n *\n * _.split('a-b-c', '-', 2);\n * // => ['a', 'b']\n */\n function split(string, separator, limit) {\n if (limit && typeof limit != 'number' && isIterateeCall(string, separator, limit)) {\n separator = limit = undefined;\n }\n limit = limit === undefined ? MAX_ARRAY_LENGTH : limit >>> 0;\n if (!limit) {\n return [];\n }\n string = toString(string);\n if (string && (\n typeof separator == 'string' ||\n (separator != null && !isRegExp(separator))\n )) {\n separator = baseToString(separator);\n if (!separator && hasUnicode(string)) {\n return castSlice(stringToArray(string), 0, limit);\n }\n }\n return string.split(separator, limit);\n }\n\n /**\n * Converts `string` to\n * [start case](https://en.wikipedia.org/wiki/Letter_case#Stylistic_or_specialised_usage).\n *\n * @static\n * @memberOf _\n * @since 3.1.0\n * @category String\n * @param {string} [string=''] The string to convert.\n * @returns {string} Returns the start cased string.\n * @example\n *\n * _.startCase('--foo-bar--');\n * // => 'Foo Bar'\n *\n * _.startCase('fooBar');\n * // => 'Foo Bar'\n *\n * _.startCase('__FOO_BAR__');\n * // => 'FOO BAR'\n */\n var startCase = createCompounder(function(result, word, index) {\n return result + (index ? ' ' : '') + upperFirst(word);\n });\n\n /**\n * Checks if `string` starts with the given target string.\n *\n * @static\n * @memberOf _\n * @since 3.0.0\n * @category String\n * @param {string} [string=''] The string to inspect.\n * @param {string} [target] The string to search for.\n * @param {number} [position=0] The position to search from.\n * @returns {boolean} Returns `true` if `string` starts with `target`,\n * else `false`.\n * @example\n *\n * _.startsWith('abc', 'a');\n * // => true\n *\n * _.startsWith('abc', 'b');\n * // => false\n *\n * _.startsWith('abc', 'b', 1);\n * // => true\n */\n function startsWith(string, target, position) {\n string = toString(string);\n position = position == null\n ? 0\n : baseClamp(toInteger(position), 0, string.length);\n\n target = baseToString(target);\n return string.slice(position, position + target.length) == target;\n }\n\n /**\n * Creates a compiled template function that can interpolate data properties\n * in \"interpolate\" delimiters, HTML-escape interpolated data properties in\n * \"escape\" delimiters, and execute JavaScript in \"evaluate\" delimiters. Data\n * properties may be accessed as free variables in the template. If a setting\n * object is given, it takes precedence over `_.templateSettings` values.\n *\n * **Note:** In the development build `_.template` utilizes\n * [sourceURLs](http://www.html5rocks.com/en/tutorials/developertools/sourcemaps/#toc-sourceurl)\n * for easier debugging.\n *\n * For more information on precompiling templates see\n * [lodash's custom builds documentation](https://lodash.com/custom-builds).\n *\n * For more information on Chrome extension sandboxes see\n * [Chrome's extensions documentation](https://developer.chrome.com/extensions/sandboxingEval).\n *\n * @static\n * @since 0.1.0\n * @memberOf _\n * @category String\n * @param {string} [string=''] The template string.\n * @param {Object} [options={}] The options object.\n * @param {RegExp} [options.escape=_.templateSettings.escape]\n * The HTML \"escape\" delimiter.\n * @param {RegExp} [options.evaluate=_.templateSettings.evaluate]\n * The \"evaluate\" delimiter.\n * @param {Object} [options.imports=_.templateSettings.imports]\n * An object to import into the template as free variables.\n * @param {RegExp} [options.interpolate=_.templateSettings.interpolate]\n * The \"interpolate\" delimiter.\n * @param {string} [options.sourceURL='lodash.templateSources[n]']\n * The sourceURL of the compiled template.\n * @param {string} [options.variable='obj']\n * The data object variable name.\n * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.\n * @returns {Function} Returns the compiled template function.\n * @example\n *\n * // Use the \"interpolate\" delimiter to create a compiled template.\n * var compiled = _.template('hello <%= user %>!');\n * compiled({ 'user': 'fred' });\n * // => 'hello fred!'\n *\n * // Use the HTML \"escape\" delimiter to escape data property values.\n * var compiled = _.template('<%- value %>');\n * compiled({ 'value': '