\nCanonicalHeaders =\n CanonicalHeadersEntry0 + CanonicalHeadersEntry1 + ... + CanonicalHeadersEntryN\nCanonicalHeadersEntry =\n Lowercase(HeaderName) + ':' + Trimall(HeaderValue) + '\\n'\n\n*/\nvar canonical_headers = function canonical_headers(headers) {\n if (!headers || Object.keys(headers).length === 0) {\n return '';\n }\n return Object.keys(headers).map(function (key) {\n return {\n key: key.toLowerCase(),\n value: headers[key] ? headers[key].trim().replace(/\\s+/g, ' ') : ''\n };\n }).sort(function (a, b) {\n return a.key < b.key ? -1 : 1;\n }).map(function (item) {\n return item.key + ':' + item.value;\n }).join('\\n') + '\\n';\n};\n/**\n * List of header keys included in the canonical headers.\n * @access private\n */\nvar signed_headers = function signed_headers(headers) {\n return Object.keys(headers).map(function (key) {\n return key.toLowerCase();\n }).sort().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 canonical_request(request) {\n var url_info = url.parse(request.url);\n return [request.method || '/', encodeURIComponent(url_info.pathname).replace(/%2F/gi, '/'), canonical_query(url_info.query), canonical_headers(request.headers), signed_headers(request.headers), hash(request.data)].join('\\n');\n};\nvar parse_service_info = function parse_service_info(request) {\n var url_info = url.parse(request.url),\n 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 credential_scope(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 string_to_sign(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 get_signing_key(secret_key, d_str, service_info) {\n logger.debug(service_info);\n var k = 'AWS4' + secret_key,\n k_date = encrypt(k, d_str),\n k_region = encrypt(k_date, service_info.region),\n k_service = encrypt(k_region, service_info.service),\n k_signing = encrypt(k_service, 'aws4_request');\n return k_signing;\n};\nvar get_signature = function get_signature(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 get_authorization_header(algorithm, access_key, scope, signed_headers, signature) {\n return [algorithm + ' ' + 'Credential=' + access_key + '/' + scope, 'SignedHeaders=' + signed_headers, 'Signature=' + signature].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 * 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) {\n service_info = null;\n }\n request.headers = request.headers || {};\n // datetime string and date string\n var dt = new Date(),\n dt_str = dt.toISOString().replace(/[:\\-]|\\.\\d{3}/g, ''),\n 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),\n scope = credential_scope(d_str, serviceInfo.region, serviceInfo.service),\n 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),\n 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),\n search = _a.search,\n parsedUrl = __rest(_a, [\"search\"]);\n var host = parsedUrl.host;\n var signedHeaders = {\n host: host\n };\n var _b = serviceInfo || parse_service_info({\n url: url.format(parsedUrl)\n }),\n region = _b.region,\n 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({\n 'X-Amz-Algorithm': DEFAULT_ALGORITHM,\n 'X-Amz-Credential': [accessInfo.access_key, credentialScope].join('/'),\n 'X-Amz-Date': now.substr(0, 16)\n }, sessionTokenRequired ? {\n 'X-Amz-Security-Token': \"\" + accessInfo.session_token\n } : {}), expiration ? {\n 'X-Amz-Expires': \"\" + expiration\n } : {}), {\n 'X-Amz-SignedHeaders': Object.keys(signedHeaders).join(',')\n });\n var canonicalRequest = canonical_request({\n method: method,\n url: url.format(__assign(__assign({}, parsedUrl), {\n query: __assign(__assign({}, parsedUrl.query), queryParams)\n })),\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({\n 'X-Amz-Signature': signature\n }, 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;","import { ConsoleLogger as Logger } from './Logger';\nvar logger = new Logger('Parser');\nvar Parser = /** @class */function () {\n function Parser() {}\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 } 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;","var __awaiter = this && this.__awaiter || function (thisArg, _arguments, P, generator) {\n function adopt(value) {\n return value instanceof P ? value : new P(function (resolve) {\n resolve(value);\n });\n }\n return new (P || (P = Promise))(function (resolve, reject) {\n function fulfilled(value) {\n try {\n step(generator.next(value));\n } catch (e) {\n reject(e);\n }\n }\n function rejected(value) {\n try {\n step(generator[\"throw\"](value));\n } catch (e) {\n reject(e);\n }\n }\n function step(result) {\n result.done ? resolve(result.value) : adopt(result.value).then(fulfilled, rejected);\n }\n step((generator = generator.apply(thisArg, _arguments || [])).next());\n });\n};\nvar __generator = this && this.__generator || function (thisArg, body) {\n var _ = {\n label: 0,\n sent: function sent() {\n if (t[0] & 1) throw t[1];\n return t[1];\n },\n trys: [],\n ops: []\n },\n f,\n y,\n t,\n g;\n return g = {\n next: verb(0),\n \"throw\": verb(1),\n \"return\": verb(2)\n }, typeof Symbol === \"function\" && (g[Symbol.iterator] = function () {\n return this;\n }), g;\n function verb(n) {\n return function (v) {\n return step([n, v]);\n };\n }\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:\n case 1:\n t = op;\n break;\n case 4:\n _.label++;\n return {\n value: op[1],\n done: false\n };\n case 5:\n _.label++;\n y = op[1];\n op = [0];\n continue;\n case 7:\n op = _.ops.pop();\n _.trys.pop();\n continue;\n default:\n if (!(t = _.trys, t = t.length > 0 && t[t.length - 1]) && (op[0] === 6 || op[0] === 2)) {\n _ = 0;\n continue;\n }\n if (op[0] === 3 && (!t || op[1] > t[0] && op[1] < t[3])) {\n _.label = op[1];\n break;\n }\n if (op[0] === 6 && _.label < t[1]) {\n _.label = t[1];\n t = op;\n break;\n }\n if (t && _.label < t[2]) {\n _.label = t[2];\n _.ops.push(op);\n break;\n }\n if (t[2]) _.ops.pop();\n _.trys.pop();\n continue;\n }\n op = body.call(thisArg, _);\n } catch (e) {\n op = [6, e];\n y = 0;\n } finally {\n f = t = 0;\n }\n if (op[0] & 5) throw op[1];\n return {\n value: op[0] ? op[1] : void 0,\n done: true\n };\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 } 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:\n return [2 /*return*/, this._refreshGoogleTokenImpl()];\n }\n });\n });\n };\n GoogleOAuth.prototype._refreshGoogleTokenImpl = function () {\n var ga = null;\n if (JS.browserOrNode().isBrowser) 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().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,\n expires_at = authResponse.expires_at;\n var profile = googleUser.getBasicProfile();\n var user = {\n email: profile.getEmail(),\n name: profile.getName()\n };\n res({\n token: id_token,\n expires_at: expires_at\n });\n });\n } else {\n rej('User is not signed in with Google');\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;","var __awaiter = this && this.__awaiter || function (thisArg, _arguments, P, generator) {\n function adopt(value) {\n return value instanceof P ? value : new P(function (resolve) {\n resolve(value);\n });\n }\n return new (P || (P = Promise))(function (resolve, reject) {\n function fulfilled(value) {\n try {\n step(generator.next(value));\n } catch (e) {\n reject(e);\n }\n }\n function rejected(value) {\n try {\n step(generator[\"throw\"](value));\n } catch (e) {\n reject(e);\n }\n }\n function step(result) {\n result.done ? resolve(result.value) : adopt(result.value).then(fulfilled, rejected);\n }\n step((generator = generator.apply(thisArg, _arguments || [])).next());\n });\n};\nvar __generator = this && this.__generator || function (thisArg, body) {\n var _ = {\n label: 0,\n sent: function sent() {\n if (t[0] & 1) throw t[1];\n return t[1];\n },\n trys: [],\n ops: []\n },\n f,\n y,\n t,\n g;\n return g = {\n next: verb(0),\n \"throw\": verb(1),\n \"return\": verb(2)\n }, typeof Symbol === \"function\" && (g[Symbol.iterator] = function () {\n return this;\n }), g;\n function verb(n) {\n return function (v) {\n return step([n, v]);\n };\n }\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:\n case 1:\n t = op;\n break;\n case 4:\n _.label++;\n return {\n value: op[1],\n done: false\n };\n case 5:\n _.label++;\n y = op[1];\n op = [0];\n continue;\n case 7:\n op = _.ops.pop();\n _.trys.pop();\n continue;\n default:\n if (!(t = _.trys, t = t.length > 0 && t[t.length - 1]) && (op[0] === 6 || op[0] === 2)) {\n _ = 0;\n continue;\n }\n if (op[0] === 3 && (!t || op[1] > t[0] && op[1] < t[3])) {\n _.label = op[1];\n break;\n }\n if (op[0] === 6 && _.label < t[1]) {\n _.label = t[1];\n t = op;\n break;\n }\n if (t && _.label < t[2]) {\n _.label = t[2];\n _.ops.push(op);\n break;\n }\n if (t[2]) _.ops.pop();\n _.trys.pop();\n continue;\n }\n op = body.call(thisArg, _);\n } catch (e) {\n op = [6, e];\n y = 0;\n } finally {\n f = t = 0;\n }\n if (op[0] & 5) throw op[1];\n return {\n value: op[0] ? op[1] : void 0,\n done: true\n };\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 } 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:\n return [2 /*return*/, this._refreshFacebookTokenImpl()];\n }\n });\n });\n };\n FacebookOAuth.prototype._refreshFacebookTokenImpl = function () {\n var fb = null;\n if (JS.browserOrNode().isBrowser) 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,\n 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({\n token: accessToken,\n expires_at: expires_at\n });\n }, {\n scope: 'public_profile,email'\n });\n });\n };\n return FacebookOAuth;\n}();\nexport default FacebookOAuth;","/*\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 * 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 * 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) ? dataMemory[key] : 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 } 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 * 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 addEventListener(action, handler) {\n return;\n }\n};\n// if not in react native, just use local storage\nvar AsyncStorage = JS.browserOrNode().isBrowser ? new MemoryStorage().getStorage() : undefined;\nexport { Linking, AppState, AsyncStorage };","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)) 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) {\n return value instanceof P ? value : new P(function (resolve) {\n resolve(value);\n });\n }\n return new (P || (P = Promise))(function (resolve, reject) {\n function fulfilled(value) {\n try {\n step(generator.next(value));\n } catch (e) {\n reject(e);\n }\n }\n function rejected(value) {\n try {\n step(generator[\"throw\"](value));\n } catch (e) {\n reject(e);\n }\n }\n function step(result) {\n result.done ? resolve(result.value) : adopt(result.value).then(fulfilled, rejected);\n }\n step((generator = generator.apply(thisArg, _arguments || [])).next());\n });\n};\nvar __generator = this && this.__generator || function (thisArg, body) {\n var _ = {\n label: 0,\n sent: function sent() {\n if (t[0] & 1) throw t[1];\n return t[1];\n },\n trys: [],\n ops: []\n },\n f,\n y,\n t,\n g;\n return g = {\n next: verb(0),\n \"throw\": verb(1),\n \"return\": verb(2)\n }, typeof Symbol === \"function\" && (g[Symbol.iterator] = function () {\n return this;\n }), g;\n function verb(n) {\n return function (v) {\n return step([n, v]);\n };\n }\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:\n case 1:\n t = op;\n break;\n case 4:\n _.label++;\n return {\n value: op[1],\n done: false\n };\n case 5:\n _.label++;\n y = op[1];\n op = [0];\n continue;\n case 7:\n op = _.ops.pop();\n _.trys.pop();\n continue;\n default:\n if (!(t = _.trys, t = t.length > 0 && t[t.length - 1]) && (op[0] === 6 || op[0] === 2)) {\n _ = 0;\n continue;\n }\n if (op[0] === 3 && (!t || op[1] > t[0] && op[1] < t[3])) {\n _.label = op[1];\n break;\n }\n if (op[0] === 6 && _.label < t[1]) {\n _.label = t[1];\n t = op;\n break;\n }\n if (t && _.label < t[2]) {\n _.label = t[2];\n _.ops.push(op);\n break;\n }\n if (t[2]) _.ops.pop();\n _.trys.pop();\n continue;\n }\n op = body.call(thisArg, _);\n } catch (e) {\n op = [6, e];\n y = 0;\n } finally {\n f = t = 0;\n }\n if (op[0] & 5) throw op[1];\n return {\n value: op[0] ? op[1] : void 0,\n done: true\n };\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) 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 && AWS.config.credentials && AWS.config.credentials instanceof AWS.Credentials) {\n this._gettingCredPromise = JS.makeQuerablePromise(this._setCredentialsFromAWS());\n } else {\n this._gettingCredPromise = JS.makeQuerablePromise(this._keepAlive());\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 && typeof Amplify.Auth.currentUserCredentials === 'function') {\n return Amplify.Auth.currentUserCredentials();\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,\n 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 } else {\n // if refresh handler exists\n if (that._refreshHandlers[provider] && typeof that._refreshHandlers[provider] === 'function') {\n logger.debug('getting refreshed jwt token from federation provider');\n return that._refreshHandlers[provider]().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 }).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 } 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,\n 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).then(function (res) {\n return res;\n }).catch(function (e) {\n 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' && e.message === \"Identity '\" + identityId + \"' not found.\" && !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 } else {\n return [2 /*return*/, e];\n }\n return [2 /*return*/];\n });\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 } 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,\n token = params.token,\n identity_id = params.identity_id,\n user = params.user,\n 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,\n identityPoolId = _a.identityPoolId,\n 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,\n region = _a.region,\n userPoolId = _a.userPoolId,\n 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) {\n 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({\n id: this._credentials.identityId\n }, 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 } 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 }, {\n priority: 1\n })];\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 };\n Credentials.prototype.set = function (params, source) {\n if (source === 'session') {\n return this._setCredentialsFromSession(params);\n } else if (source === 'federation') {\n return this._setCredentialsFromFederation(params);\n } else if (source === 'guest') {\n return this._setCredentialsForGuest();\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:\n 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 * 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 get() {\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) {\n filePath = '/service-worker.js';\n }\n if (scope === void 0) {\n scope = '/';\n }\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.register(filePath, {\n scope: scope\n }).then(function (registration) {\n if (registration.installing) {\n _this._serviceWorker = registration.installing;\n } else if (registration.waiting) {\n _this._serviceWorker = registration.waiting;\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 }).catch(function (error) {\n _this._logger.debug(\"Service Worker Registration Failed \" + error);\n return reject(error);\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) 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 } else {\n _this._logger.debug(\"User is NOT subscribed to push\");\n return _this._registration.pushManager.subscribe({\n userVisibleOnly: true,\n applicationServerKey: _this._urlB64ToUint8Array(publicKey)\n }).then(function (subscription) {\n _this._subscription = subscription;\n _this._logger.debug(\"User subscribed: \" + JSON.stringify(subscription));\n resolve(subscription);\n }).catch(function (error) {\n _this._logger.error(error);\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).replace(/\\-/g, '+').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 * 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 * 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 { AWS } from './Facet';\nimport { ConsoleLogger as Logger } from './Logger';\nimport Amplify from './Amplify';\nexport * from './Facet';\nexport { default as ClientDevice } from './ClientDevice';\nexport { ConsoleLogger, ConsoleLogger as Logger } from './Logger';\nexport * from './Errors';\nexport { default as Hub } from './Hub';\nexport { default as I18n } from './I18n';\nexport { default as JS } from './JS';\nexport { default as Signer } from './Signer';\nexport { default as Parser } from './Parser';\nexport { FacebookOAuth, GoogleOAuth } from './OAuthHelper';\nexport * from './RNComponents';\nexport { default as Credentials } from './Credentials';\nexport { default as ServiceWorker } from './ServiceWorker';\nexport { default as StorageHelper, MemoryStorage } from './StorageHelper';\nexport { default as Platform } from './Platform';\nimport Platform from './Platform';\nexport var Constants = {\n userAgent: Platform.userAgent\n};\nexport default Amplify;\nvar logger = new Logger('Core');\nif (AWS['util']) {\n AWS['util'].userAgent = function () {\n return Constants.userAgent;\n };\n} else if (AWS.config) {\n AWS.config.update({\n customUserAgent: Constants.userAgent\n });\n} else {\n logger.warn('No AWS.config');\n}","'use strict';\n\nvar globalThis = require('../internals/global-this');\nvar getOwnPropertyDescriptor = require('../internals/object-get-own-property-descriptor').f;\nvar createNonEnumerableProperty = require('../internals/create-non-enumerable-property');\nvar defineBuiltIn = require('../internals/define-built-in');\nvar defineGlobalProperty = require('../internals/define-global-property');\nvar copyConstructorProperties = require('../internals/copy-constructor-properties');\nvar isForced = require('../internals/is-forced');\n\n/*\n options.target - name of the target object\n options.global - target is the global object\n options.stat - export as static methods of target\n options.proto - export as prototype methods of target\n options.real - real prototype method for the `pure` version\n options.forced - export even if the native feature is available\n options.bind - bind methods to the target, required for the `pure` version\n options.wrap - wrap constructors to preventing global pollution, required for the `pure` version\n options.unsafe - use the simple assignment of property instead of delete + defineProperty\n options.sham - add a flag to not completely full polyfills\n options.enumerable - export as enumerable property\n options.dontCallGetSet - prevent calling a getter on target\n options.name - the .name of the function if it does not match the key\n*/\nmodule.exports = function (options, source) {\n var TARGET = options.target;\n var GLOBAL = options.global;\n var STATIC = options.stat;\n var FORCED, target, key, targetProperty, sourceProperty, descriptor;\n if (GLOBAL) {\n target = globalThis;\n } else if (STATIC) {\n target = globalThis[TARGET] || defineGlobalProperty(TARGET, {});\n } else {\n target = globalThis[TARGET] && globalThis[TARGET].prototype;\n }\n if (target) for (key in source) {\n sourceProperty = source[key];\n if (options.dontCallGetSet) {\n descriptor = getOwnPropertyDescriptor(target, key);\n targetProperty = descriptor && descriptor.value;\n } else targetProperty = target[key];\n FORCED = isForced(GLOBAL ? key : TARGET + (STATIC ? '.' : '#') + key, options.forced);\n // contained in target\n if (!FORCED && targetProperty !== undefined) {\n if (typeof sourceProperty == typeof targetProperty) continue;\n copyConstructorProperties(sourceProperty, targetProperty);\n }\n // add a flag to not completely full polyfills\n if (options.sham || targetProperty && targetProperty.sham) {\n createNonEnumerableProperty(sourceProperty, 'sham', true);\n }\n defineBuiltIn(target, key, sourceProperty, options);\n }\n};","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)) t[p] = s[p];\n }\n return t;\n };\n return __assign.apply(this, arguments);\n};\nimport { ConsoleLogger as Logger } from '@aws-amplify/core';\nvar logger = new Logger('AbstractPubSubProvider');\nvar AbstractPubSubProvider = /** @class */function () {\n function AbstractPubSubProvider(options) {\n if (options === void 0) {\n options = {};\n }\n this._config = options;\n }\n AbstractPubSubProvider.prototype.configure = function (config) {\n if (config === void 0) {\n config = {};\n }\n this._config = __assign(__assign({}, config), this._config);\n logger.debug(\"configure \" + this.getProviderName(), this._config);\n return this.options;\n };\n AbstractPubSubProvider.prototype.getCategory = function () {\n return 'PubSub';\n };\n Object.defineProperty(AbstractPubSubProvider.prototype, \"options\", {\n get: function get() {\n return __assign({}, this._config);\n },\n enumerable: true,\n configurable: true\n });\n return AbstractPubSubProvider;\n}();\nexport { AbstractPubSubProvider };","var __extends = this && this.__extends || function () {\n var _extendStatics = function extendStatics(d, b) {\n _extendStatics = Object.setPrototypeOf || {\n __proto__: []\n } instanceof Array && function (d, b) {\n d.__proto__ = b;\n } || function (d, b) {\n for (var p in b) if (b.hasOwnProperty(p)) d[p] = b[p];\n };\n return _extendStatics(d, b);\n };\n return function (d, b) {\n _extendStatics(d, b);\n function __() {\n this.constructor = d;\n }\n d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());\n };\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)) 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) {\n return value instanceof P ? value : new P(function (resolve) {\n resolve(value);\n });\n }\n return new (P || (P = Promise))(function (resolve, reject) {\n function fulfilled(value) {\n try {\n step(generator.next(value));\n } catch (e) {\n reject(e);\n }\n }\n function rejected(value) {\n try {\n step(generator[\"throw\"](value));\n } catch (e) {\n reject(e);\n }\n }\n function step(result) {\n result.done ? resolve(result.value) : adopt(result.value).then(fulfilled, rejected);\n }\n step((generator = generator.apply(thisArg, _arguments || [])).next());\n });\n};\nvar __generator = this && this.__generator || function (thisArg, body) {\n var _ = {\n label: 0,\n sent: function sent() {\n if (t[0] & 1) throw t[1];\n return t[1];\n },\n trys: [],\n ops: []\n },\n f,\n y,\n t,\n g;\n return g = {\n next: verb(0),\n \"throw\": verb(1),\n \"return\": verb(2)\n }, typeof Symbol === \"function\" && (g[Symbol.iterator] = function () {\n return this;\n }), g;\n function verb(n) {\n return function (v) {\n return step([n, v]);\n };\n }\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:\n case 1:\n t = op;\n break;\n case 4:\n _.label++;\n return {\n value: op[1],\n done: false\n };\n case 5:\n _.label++;\n y = op[1];\n op = [0];\n continue;\n case 7:\n op = _.ops.pop();\n _.trys.pop();\n continue;\n default:\n if (!(t = _.trys, t = t.length > 0 && t[t.length - 1]) && (op[0] === 6 || op[0] === 2)) {\n _ = 0;\n continue;\n }\n if (op[0] === 3 && (!t || op[1] > t[0] && op[1] < t[3])) {\n _.label = op[1];\n break;\n }\n if (op[0] === 6 && _.label < t[1]) {\n _.label = t[1];\n t = op;\n break;\n }\n if (t && _.label < t[2]) {\n _.label = t[2];\n _.ops.push(op);\n break;\n }\n if (t[2]) _.ops.pop();\n _.trys.pop();\n continue;\n }\n op = body.call(thisArg, _);\n } catch (e) {\n op = [6, e];\n y = 0;\n } finally {\n f = t = 0;\n }\n if (op[0] & 5) throw op[1];\n return {\n value: op[0] ? op[1] : void 0,\n done: true\n };\n }\n};\nvar __rest = this && this.__rest || function (s, e) {\n var t = {};\n for (var p in s) if (Object.prototype.hasOwnProperty.call(s, p) && e.indexOf(p) < 0) t[p] = s[p];\n if (s != null && typeof Object.getOwnPropertySymbols === \"function\") for (var i = 0, p = Object.getOwnPropertySymbols(s); i < p.length; i++) {\n if (e.indexOf(p[i]) < 0 && Object.prototype.propertyIsEnumerable.call(s, p[i])) t[p[i]] = s[p[i]];\n }\n return t;\n};\n/*\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 */\nimport * as Paho from 'paho-mqtt';\nimport { v4 as uuid } from 'uuid';\nimport * as Observable from 'zen-observable';\nimport { AbstractPubSubProvider } from './PubSubProvider';\nimport { ConsoleLogger as Logger } from '@aws-amplify/core';\nvar logger = new Logger('MqttOverWSProvider');\nexport function mqttTopicMatch(filter, topic) {\n var filterArray = filter.split('/');\n var length = filterArray.length;\n var topicArray = topic.split('/');\n for (var i = 0; i < length; ++i) {\n var left = filterArray[i];\n var right = topicArray[i];\n if (left === '#') return topicArray.length >= length;\n if (left !== '+' && left !== right) return false;\n }\n return length === topicArray.length;\n}\nvar ClientsQueue = /** @class */function () {\n function ClientsQueue() {\n this.promises = new Map();\n }\n ClientsQueue.prototype.get = function (clientId, clientFactory) {\n return __awaiter(this, void 0, void 0, function () {\n var promise;\n return __generator(this, function (_a) {\n promise = this.promises.get(clientId);\n if (promise) {\n return [2 /*return*/, promise];\n }\n promise = clientFactory(clientId);\n this.promises.set(clientId, promise);\n return [2 /*return*/, promise];\n });\n });\n };\n Object.defineProperty(ClientsQueue.prototype, \"allClients\", {\n get: function get() {\n return Array.from(this.promises.keys());\n },\n enumerable: true,\n configurable: true\n });\n ClientsQueue.prototype.remove = function (clientId) {\n this.promises.delete(clientId);\n };\n return ClientsQueue;\n}();\nvar topicSymbol = typeof Symbol !== 'undefined' ? Symbol('topic') : '@@topic';\nvar MqttOverWSProvider = /** @class */function (_super) {\n __extends(MqttOverWSProvider, _super);\n function MqttOverWSProvider(options) {\n if (options === void 0) {\n options = {};\n }\n var _this = _super.call(this, __assign(__assign({}, options), {\n clientId: options.clientId || uuid()\n })) || this;\n _this._clientsQueue = new ClientsQueue();\n _this._topicObservers = new Map();\n _this._clientIdObservers = new Map();\n return _this;\n }\n Object.defineProperty(MqttOverWSProvider.prototype, \"clientId\", {\n get: function get() {\n return this.options.clientId;\n },\n enumerable: true,\n configurable: true\n });\n Object.defineProperty(MqttOverWSProvider.prototype, \"endpoint\", {\n get: function get() {\n return this.options.aws_pubsub_endpoint;\n },\n enumerable: true,\n configurable: true\n });\n Object.defineProperty(MqttOverWSProvider.prototype, \"clientsQueue\", {\n get: function get() {\n return this._clientsQueue;\n },\n enumerable: true,\n configurable: true\n });\n Object.defineProperty(MqttOverWSProvider.prototype, \"isSSLEnabled\", {\n get: function get() {\n return !this.options.aws_appsync_dangerously_connect_to_http_endpoint_for_testing;\n },\n enumerable: true,\n configurable: true\n });\n MqttOverWSProvider.prototype.getTopicForValue = function (value) {\n return typeof value === 'object' && value[topicSymbol];\n };\n MqttOverWSProvider.prototype.getProviderName = function () {\n return 'MqttOverWSProvider';\n };\n MqttOverWSProvider.prototype.onDisconnect = function (_a) {\n var clientId = _a.clientId,\n errorCode = _a.errorCode,\n args = __rest(_a, [\"clientId\", \"errorCode\"]);\n if (errorCode !== 0) {\n logger.warn(clientId, JSON.stringify(__assign({\n errorCode: errorCode\n }, args), null, 2));\n this._topicObservers.forEach(function (observerForTopic, _observerTopic) {\n observerForTopic.forEach(function (observer) {\n observer.error('Disconnected, error code: ' + errorCode);\n observer.complete();\n });\n });\n }\n this._topicObservers = new Map();\n };\n MqttOverWSProvider.prototype.newClient = function (_a) {\n var url = _a.url,\n clientId = _a.clientId;\n return __awaiter(this, void 0, void 0, function () {\n var client;\n var _this = this;\n return __generator(this, function (_b) {\n switch (_b.label) {\n case 0:\n logger.debug('Creating new MQTT client', clientId);\n client = new Paho.Client(url, clientId);\n // client.trace = (args) => logger.debug(clientId, JSON.stringify(args, null, 2));\n client.onMessageArrived = function (_a) {\n var topic = _a.destinationName,\n msg = _a.payloadString;\n _this._onMessage(topic, msg);\n };\n client.onConnectionLost = function (_a) {\n var errorCode = _a.errorCode,\n args = __rest(_a, [\"errorCode\"]);\n _this.onDisconnect(__assign({\n clientId: clientId,\n errorCode: errorCode\n }, args));\n };\n return [4 /*yield*/, new Promise(function (resolve, reject) {\n client.connect({\n useSSL: _this.isSSLEnabled,\n mqttVersion: 3,\n onSuccess: function onSuccess() {\n return resolve(client);\n },\n onFailure: reject\n });\n })];\n case 1:\n _b.sent();\n return [2 /*return*/, client];\n }\n });\n });\n };\n MqttOverWSProvider.prototype.connect = function (clientId, options) {\n if (options === void 0) {\n options = {};\n }\n return __awaiter(this, void 0, void 0, function () {\n var _this = this;\n return __generator(this, function (_a) {\n switch (_a.label) {\n case 0:\n return [4 /*yield*/, this.clientsQueue.get(clientId, function (clientId) {\n return _this.newClient(__assign(__assign({}, options), {\n clientId: clientId\n }));\n })];\n case 1:\n return [2 /*return*/, _a.sent()];\n }\n });\n });\n };\n MqttOverWSProvider.prototype.disconnect = function (clientId) {\n return __awaiter(this, void 0, void 0, function () {\n var client;\n return __generator(this, function (_a) {\n switch (_a.label) {\n case 0:\n return [4 /*yield*/, this.clientsQueue.get(clientId, function () {\n return null;\n })];\n case 1:\n client = _a.sent();\n if (client && client.isConnected()) {\n client.disconnect();\n }\n this.clientsQueue.remove(clientId);\n return [2 /*return*/];\n }\n });\n });\n };\n MqttOverWSProvider.prototype.publish = function (topics, msg) {\n return __awaiter(this, void 0, void 0, function () {\n var targetTopics, message, url, client;\n return __generator(this, function (_a) {\n switch (_a.label) {\n case 0:\n targetTopics = [].concat(topics);\n message = JSON.stringify(msg);\n return [4 /*yield*/, this.endpoint];\n case 1:\n url = _a.sent();\n return [4 /*yield*/, this.connect(this.clientId, {\n url: url\n })];\n case 2:\n client = _a.sent();\n logger.debug('Publishing to topic(s)', targetTopics.join(','), message);\n targetTopics.forEach(function (topic) {\n return client.send(topic, message);\n });\n return [2 /*return*/];\n }\n });\n });\n };\n MqttOverWSProvider.prototype._onMessage = function (topic, msg) {\n try {\n var matchedTopicObservers_1 = [];\n this._topicObservers.forEach(function (observerForTopic, observerTopic) {\n if (mqttTopicMatch(observerTopic, topic)) {\n matchedTopicObservers_1.push(observerForTopic);\n }\n });\n var parsedMessage_1 = JSON.parse(msg);\n if (typeof parsedMessage_1 === 'object') {\n parsedMessage_1[topicSymbol] = topic;\n }\n matchedTopicObservers_1.forEach(function (observersForTopic) {\n observersForTopic.forEach(function (observer) {\n return observer.next(parsedMessage_1);\n });\n });\n } catch (error) {\n logger.warn('Error handling message', error, msg);\n }\n };\n MqttOverWSProvider.prototype.subscribe = function (topics, options) {\n var _this = this;\n if (options === void 0) {\n options = {};\n }\n var targetTopics = [].concat(topics);\n logger.debug('Subscribing to topic(s)', targetTopics.join(','));\n return new Observable(function (observer) {\n targetTopics.forEach(function (topic) {\n var observersForTopic = _this._topicObservers.get(topic);\n if (!observersForTopic) {\n observersForTopic = new Set();\n _this._topicObservers.set(topic, observersForTopic);\n }\n observersForTopic.add(observer);\n });\n // @ts-ignore\n var client;\n var _a = options.clientId,\n clientId = _a === void 0 ? _this.clientId : _a;\n var observersForClientId = _this._clientIdObservers.get(clientId);\n if (!observersForClientId) {\n observersForClientId = new Set();\n }\n observersForClientId.add(observer);\n _this._clientIdObservers.set(clientId, observersForClientId);\n (function () {\n return __awaiter(_this, void 0, void 0, function () {\n var _a, url, _b, e_1;\n return __generator(this, function (_c) {\n switch (_c.label) {\n case 0:\n _a = options.url;\n if (!(_a === void 0)) return [3 /*break*/, 2];\n return [4 /*yield*/, this.endpoint];\n case 1:\n _b = _c.sent();\n return [3 /*break*/, 3];\n case 2:\n _b = _a;\n _c.label = 3;\n case 3:\n url = _b;\n _c.label = 4;\n case 4:\n _c.trys.push([4, 6,, 7]);\n return [4 /*yield*/, this.connect(clientId, {\n url: url\n })];\n case 5:\n client = _c.sent();\n targetTopics.forEach(function (topic) {\n client.subscribe(topic);\n });\n return [3 /*break*/, 7];\n case 6:\n e_1 = _c.sent();\n observer.error(e_1);\n return [3 /*break*/, 7];\n case 7:\n return [2 /*return*/];\n }\n });\n });\n })();\n return function () {\n logger.debug('Unsubscribing from topic(s)', targetTopics.join(','));\n if (client) {\n _this._clientIdObservers.get(clientId).delete(observer);\n targetTopics.forEach(function (topic) {\n if (client.isConnected()) {\n client.unsubscribe(topic);\n }\n var observersForTopic = _this._topicObservers.get(topic) || new Set();\n observersForTopic.forEach(function (observer) {\n return observer.complete();\n });\n observersForTopic.clear();\n });\n if (_this._clientIdObservers.get(clientId).size === 0) {\n _this.disconnect(clientId);\n _this._clientIdObservers.delete(clientId);\n }\n }\n return null;\n };\n });\n };\n return MqttOverWSProvider;\n}(AbstractPubSubProvider);\nexport { MqttOverWSProvider };","var __extends = this && this.__extends || function () {\n var _extendStatics = function extendStatics(d, b) {\n _extendStatics = Object.setPrototypeOf || {\n __proto__: []\n } instanceof Array && function (d, b) {\n d.__proto__ = b;\n } || function (d, b) {\n for (var p in b) if (b.hasOwnProperty(p)) d[p] = b[p];\n };\n return _extendStatics(d, b);\n };\n return function (d, b) {\n _extendStatics(d, b);\n function __() {\n this.constructor = d;\n }\n d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());\n };\n}();\nvar __awaiter = this && this.__awaiter || function (thisArg, _arguments, P, generator) {\n function adopt(value) {\n return value instanceof P ? value : new P(function (resolve) {\n resolve(value);\n });\n }\n return new (P || (P = Promise))(function (resolve, reject) {\n function fulfilled(value) {\n try {\n step(generator.next(value));\n } catch (e) {\n reject(e);\n }\n }\n function rejected(value) {\n try {\n step(generator[\"throw\"](value));\n } catch (e) {\n reject(e);\n }\n }\n function step(result) {\n result.done ? resolve(result.value) : adopt(result.value).then(fulfilled, rejected);\n }\n step((generator = generator.apply(thisArg, _arguments || [])).next());\n });\n};\nvar __generator = this && this.__generator || function (thisArg, body) {\n var _ = {\n label: 0,\n sent: function sent() {\n if (t[0] & 1) throw t[1];\n return t[1];\n },\n trys: [],\n ops: []\n },\n f,\n y,\n t,\n g;\n return g = {\n next: verb(0),\n \"throw\": verb(1),\n \"return\": verb(2)\n }, typeof Symbol === \"function\" && (g[Symbol.iterator] = function () {\n return this;\n }), g;\n function verb(n) {\n return function (v) {\n return step([n, v]);\n };\n }\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:\n case 1:\n t = op;\n break;\n case 4:\n _.label++;\n return {\n value: op[1],\n done: false\n };\n case 5:\n _.label++;\n y = op[1];\n op = [0];\n continue;\n case 7:\n op = _.ops.pop();\n _.trys.pop();\n continue;\n default:\n if (!(t = _.trys, t = t.length > 0 && t[t.length - 1]) && (op[0] === 6 || op[0] === 2)) {\n _ = 0;\n continue;\n }\n if (op[0] === 3 && (!t || op[1] > t[0] && op[1] < t[3])) {\n _.label = op[1];\n break;\n }\n if (op[0] === 6 && _.label < t[1]) {\n _.label = t[1];\n t = op;\n break;\n }\n if (t && _.label < t[2]) {\n _.label = t[2];\n _.ops.push(op);\n break;\n }\n if (t[2]) _.ops.pop();\n _.trys.pop();\n continue;\n }\n op = body.call(thisArg, _);\n } catch (e) {\n op = [6, e];\n y = 0;\n } finally {\n f = t = 0;\n }\n if (op[0] & 5) throw op[1];\n return {\n value: op[0] ? op[1] : void 0,\n done: true\n };\n }\n};\nvar __rest = this && this.__rest || function (s, e) {\n var t = {};\n for (var p in s) if (Object.prototype.hasOwnProperty.call(s, p) && e.indexOf(p) < 0) t[p] = s[p];\n if (s != null && typeof Object.getOwnPropertySymbols === \"function\") for (var i = 0, p = Object.getOwnPropertySymbols(s); i < p.length; i++) {\n if (e.indexOf(p[i]) < 0 && Object.prototype.propertyIsEnumerable.call(s, p[i])) t[p[i]] = s[p[i]];\n }\n return t;\n};\nvar __spreadArrays = this && this.__spreadArrays || function () {\n for (var s = 0, i = 0, il = arguments.length; i < il; i++) s += arguments[i].length;\n for (var r = Array(s), k = 0, i = 0; i < il; i++) for (var a = arguments[i], j = 0, jl = a.length; j < jl; j++, k++) r[k] = a[j];\n return r;\n};\nimport * as Observable from 'zen-observable';\nimport { ConsoleLogger as Logger } from '@aws-amplify/core';\nimport { MqttOverWSProvider } from './MqttOverWSProvider';\nvar logger = new Logger('AWSAppSyncProvider');\nvar AWSAppSyncProvider = /** @class */function (_super) {\n __extends(AWSAppSyncProvider, _super);\n function AWSAppSyncProvider() {\n var _this = _super !== null && _super.apply(this, arguments) || this;\n _this._topicClient = new Map();\n _this._topicAlias = new Map();\n return _this;\n }\n Object.defineProperty(AWSAppSyncProvider.prototype, \"endpoint\", {\n get: function get() {\n throw new Error('Not supported');\n },\n enumerable: true,\n configurable: true\n });\n AWSAppSyncProvider.prototype.getProviderName = function () {\n return 'AWSAppSyncProvider';\n };\n AWSAppSyncProvider.prototype.publish = function (topics, msg, options) {\n return __awaiter(this, void 0, void 0, function () {\n return __generator(this, function (_a) {\n throw new Error('Operation not supported');\n });\n });\n };\n AWSAppSyncProvider.prototype._cleanUp = function (clientId) {\n var _this = this;\n var topicsForClient = Array.from(this._topicClient.entries()).filter(function (_a) {\n var c = _a[1];\n return c.clientId === clientId;\n }).map(function (_a) {\n var t = _a[0];\n return t;\n });\n topicsForClient.forEach(function (t) {\n return _this._cleanUpForTopic(t);\n });\n };\n AWSAppSyncProvider.prototype._cleanUpForTopic = function (topic) {\n this._topicClient.delete(topic);\n this._topicAlias.delete(topic);\n };\n AWSAppSyncProvider.prototype.onDisconnect = function (_a) {\n var _this = this;\n var clientId = _a.clientId,\n errorCode = _a.errorCode,\n args = __rest(_a, [\"clientId\", \"errorCode\"]);\n if (errorCode !== 0) {\n var topicsForClient = Array.from(this._topicClient.entries()).filter(function (_a) {\n var c = _a[1];\n return c.clientId === clientId;\n }).map(function (_a) {\n var t = _a[0];\n return t;\n });\n topicsForClient.forEach(function (topic) {\n if (_this._topicObservers.has(topic)) {\n _this._topicObservers.get(topic).forEach(function (obs) {\n if (!obs.closed) {\n obs.error(args);\n }\n });\n _this._topicObservers.delete(topic);\n }\n });\n this._cleanUp(clientId);\n }\n };\n AWSAppSyncProvider.prototype.disconnect = function (clientId) {\n return __awaiter(this, void 0, void 0, function () {\n var client;\n return __generator(this, function (_a) {\n switch (_a.label) {\n case 0:\n return [4 /*yield*/, this.clientsQueue.get(clientId, function () {\n return null;\n })];\n case 1:\n client = _a.sent();\n return [4 /*yield*/, _super.prototype.disconnect.call(this, clientId)];\n case 2:\n _a.sent();\n this._cleanUp(clientId);\n return [2 /*return*/];\n }\n });\n });\n };\n AWSAppSyncProvider.prototype.subscribe = function (topics, options) {\n var _this = this;\n if (options === void 0) {\n options = {};\n }\n var result = new Observable(function (observer) {\n var targetTopics = [].concat(topics);\n logger.debug('Subscribing to topic(s)', targetTopics.join(','));\n (function () {\n return __awaiter(_this, void 0, void 0, function () {\n var _a, mqttConnections, newSubscriptions, newAliases, map;\n var _this = this;\n return __generator(this, function (_b) {\n switch (_b.label) {\n case 0:\n // Add these topics to map\n targetTopics.forEach(function (t) {\n if (!_this._topicObservers.has(t)) {\n _this._topicObservers.set(t, new Set());\n }\n _this._topicObservers.get(t).add(observer);\n });\n _a = options.mqttConnections, mqttConnections = _a === void 0 ? [] : _a, newSubscriptions = options.newSubscriptions;\n newAliases = Object.entries(newSubscriptions).map(function (_a) {\n var alias = _a[0],\n v = _a[1];\n return [v.topic, alias];\n });\n // Merge new aliases with old ones\n this._topicAlias = new Map(__spreadArrays(Array.from(this._topicAlias.entries()), newAliases));\n map = Object.entries(targetTopics.reduce(function (acc, elem) {\n var connectionInfoForTopic = mqttConnections.find(function (c) {\n return c.topics.indexOf(elem) > -1;\n });\n if (connectionInfoForTopic) {\n var clientId = connectionInfoForTopic.client,\n url = connectionInfoForTopic.url;\n if (!acc[clientId]) {\n acc[clientId] = {\n url: url,\n topics: new Set()\n };\n }\n acc[clientId].topics.add(elem);\n }\n return acc;\n }, {}));\n // reconnect everything we have in the map\n return [4 /*yield*/, Promise.all(map.map(function (_a) {\n var clientId = _a[0],\n _b = _a[1],\n url = _b.url,\n topics = _b.topics;\n return __awaiter(_this, void 0, void 0, function () {\n var client, err_1;\n var _this = this;\n return __generator(this, function (_c) {\n switch (_c.label) {\n case 0:\n client = null;\n _c.label = 1;\n case 1:\n _c.trys.push([1, 3,, 4]);\n return [4 /*yield*/, this.connect(clientId, {\n clientId: clientId,\n url: url\n })];\n case 2:\n client = _c.sent();\n return [3 /*break*/, 4];\n case 3:\n err_1 = _c.sent();\n observer.error({\n message: 'Failed to connect',\n error: err_1\n });\n observer.complete();\n return [2 /*return*/, undefined];\n case 4:\n // subscribe to all topics for this client\n // store topic-client mapping\n topics.forEach(function (topic) {\n if (client.isConnected()) {\n client.subscribe(topic);\n _this._topicClient.set(topic, client);\n }\n });\n return [2 /*return*/, client];\n }\n });\n });\n }))];\n case 1:\n // reconnect everything we have in the map\n _b.sent();\n return [2 /*return*/];\n }\n });\n });\n })();\n return function () {\n logger.debug('Unsubscribing from topic(s)', targetTopics.join(','));\n targetTopics.forEach(function (t) {\n var client = _this._topicClient.get(t);\n if (client && client.isConnected()) {\n client.unsubscribe(t);\n _this._topicClient.delete(t);\n if (!Array.from(_this._topicClient.values()).some(function (c) {\n return c === client;\n })) {\n _this.disconnect(client.clientId);\n }\n }\n _this._topicObservers.delete(t);\n });\n };\n });\n return Observable.from(result).map(function (value) {\n var topic = _this.getTopicForValue(value);\n var alias = _this._topicAlias.get(topic);\n value.data = Object.entries(value.data).reduce(function (obj, _a) {\n var origKey = _a[0],\n val = _a[1];\n return obj[alias || origKey] = val, obj;\n }, {});\n return value;\n });\n };\n return AWSAppSyncProvider;\n}(MqttOverWSProvider);\nexport { AWSAppSyncProvider };","var __extends = this && this.__extends || function () {\n var _extendStatics = function extendStatics(d, b) {\n _extendStatics = Object.setPrototypeOf || {\n __proto__: []\n } instanceof Array && function (d, b) {\n d.__proto__ = b;\n } || function (d, b) {\n for (var p in b) if (b.hasOwnProperty(p)) d[p] = b[p];\n };\n return _extendStatics(d, b);\n };\n return function (d, b) {\n _extendStatics(d, b);\n function __() {\n this.constructor = d;\n }\n d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());\n };\n}();\nvar __awaiter = this && this.__awaiter || function (thisArg, _arguments, P, generator) {\n function adopt(value) {\n return value instanceof P ? value : new P(function (resolve) {\n resolve(value);\n });\n }\n return new (P || (P = Promise))(function (resolve, reject) {\n function fulfilled(value) {\n try {\n step(generator.next(value));\n } catch (e) {\n reject(e);\n }\n }\n function rejected(value) {\n try {\n step(generator[\"throw\"](value));\n } catch (e) {\n reject(e);\n }\n }\n function step(result) {\n result.done ? resolve(result.value) : adopt(result.value).then(fulfilled, rejected);\n }\n step((generator = generator.apply(thisArg, _arguments || [])).next());\n });\n};\nvar __generator = this && this.__generator || function (thisArg, body) {\n var _ = {\n label: 0,\n sent: function sent() {\n if (t[0] & 1) throw t[1];\n return t[1];\n },\n trys: [],\n ops: []\n },\n f,\n y,\n t,\n g;\n return g = {\n next: verb(0),\n \"throw\": verb(1),\n \"return\": verb(2)\n }, typeof Symbol === \"function\" && (g[Symbol.iterator] = function () {\n return this;\n }), g;\n function verb(n) {\n return function (v) {\n return step([n, v]);\n };\n }\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:\n case 1:\n t = op;\n break;\n case 4:\n _.label++;\n return {\n value: op[1],\n done: false\n };\n case 5:\n _.label++;\n y = op[1];\n op = [0];\n continue;\n case 7:\n op = _.ops.pop();\n _.trys.pop();\n continue;\n default:\n if (!(t = _.trys, t = t.length > 0 && t[t.length - 1]) && (op[0] === 6 || op[0] === 2)) {\n _ = 0;\n continue;\n }\n if (op[0] === 3 && (!t || op[1] > t[0] && op[1] < t[3])) {\n _.label = op[1];\n break;\n }\n if (op[0] === 6 && _.label < t[1]) {\n _.label = t[1];\n t = op;\n break;\n }\n if (t && _.label < t[2]) {\n _.label = t[2];\n _.ops.push(op);\n break;\n }\n if (t[2]) _.ops.pop();\n _.trys.pop();\n continue;\n }\n op = body.call(thisArg, _);\n } catch (e) {\n op = [6, e];\n y = 0;\n } finally {\n f = t = 0;\n }\n if (op[0] & 5) throw op[1];\n return {\n value: op[0] ? op[1] : void 0,\n done: true\n };\n }\n};\n/*\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 */\nimport { MqttOverWSProvider } from './MqttOverWSProvider';\nimport { Signer, Credentials } from '@aws-amplify/core';\nvar SERVICE_NAME = 'iotdevicegateway';\nvar AWSIoTProvider = /** @class */function (_super) {\n __extends(AWSIoTProvider, _super);\n function AWSIoTProvider() {\n return _super !== null && _super.apply(this, arguments) || this;\n }\n Object.defineProperty(AWSIoTProvider.prototype, \"region\", {\n get: function get() {\n return this.options.aws_pubsub_region;\n },\n enumerable: true,\n configurable: true\n });\n AWSIoTProvider.prototype.getProviderName = function () {\n return 'AWSIoTProvider';\n };\n Object.defineProperty(AWSIoTProvider.prototype, \"endpoint\", {\n get: function get() {\n var _this = this;\n return function () {\n return __awaiter(_this, void 0, void 0, function () {\n var endpoint, serviceInfo, _a, access_key, secret_key, session_token, result;\n return __generator(this, function (_b) {\n switch (_b.label) {\n case 0:\n endpoint = this.options.aws_pubsub_endpoint;\n serviceInfo = {\n service: SERVICE_NAME,\n region: this.region\n };\n return [4 /*yield*/, Credentials.get()];\n case 1:\n _a = _b.sent(), access_key = _a.accessKeyId, secret_key = _a.secretAccessKey, session_token = _a.sessionToken;\n result = Signer.signUrl(endpoint, {\n access_key: access_key,\n secret_key: secret_key,\n session_token: session_token\n }, serviceInfo);\n return [2 /*return*/, result];\n }\n });\n });\n }();\n },\n enumerable: true,\n configurable: true\n });\n return AWSIoTProvider;\n}(MqttOverWSProvider);\nexport { AWSIoTProvider };","var __awaiter = this && this.__awaiter || function (thisArg, _arguments, P, generator) {\n function adopt(value) {\n return value instanceof P ? value : new P(function (resolve) {\n resolve(value);\n });\n }\n return new (P || (P = Promise))(function (resolve, reject) {\n function fulfilled(value) {\n try {\n step(generator.next(value));\n } catch (e) {\n reject(e);\n }\n }\n function rejected(value) {\n try {\n step(generator[\"throw\"](value));\n } catch (e) {\n reject(e);\n }\n }\n function step(result) {\n result.done ? resolve(result.value) : adopt(result.value).then(fulfilled, rejected);\n }\n step((generator = generator.apply(thisArg, _arguments || [])).next());\n });\n};\nvar __generator = this && this.__generator || function (thisArg, body) {\n var _ = {\n label: 0,\n sent: function sent() {\n if (t[0] & 1) throw t[1];\n return t[1];\n },\n trys: [],\n ops: []\n },\n f,\n y,\n t,\n g;\n return g = {\n next: verb(0),\n \"throw\": verb(1),\n \"return\": verb(2)\n }, typeof Symbol === \"function\" && (g[Symbol.iterator] = function () {\n return this;\n }), g;\n function verb(n) {\n return function (v) {\n return step([n, v]);\n };\n }\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:\n case 1:\n t = op;\n break;\n case 4:\n _.label++;\n return {\n value: op[1],\n done: false\n };\n case 5:\n _.label++;\n y = op[1];\n op = [0];\n continue;\n case 7:\n op = _.ops.pop();\n _.trys.pop();\n continue;\n default:\n if (!(t = _.trys, t = t.length > 0 && t[t.length - 1]) && (op[0] === 6 || op[0] === 2)) {\n _ = 0;\n continue;\n }\n if (op[0] === 3 && (!t || op[1] > t[0] && op[1] < t[3])) {\n _.label = op[1];\n break;\n }\n if (op[0] === 6 && _.label < t[1]) {\n _.label = t[1];\n t = op;\n break;\n }\n if (t && _.label < t[2]) {\n _.label = t[2];\n _.ops.push(op);\n break;\n }\n if (t[2]) _.ops.pop();\n _.trys.pop();\n continue;\n }\n op = body.call(thisArg, _);\n } catch (e) {\n op = [6, e];\n y = 0;\n } finally {\n f = t = 0;\n }\n if (op[0] & 5) throw op[1];\n return {\n value: op[0] ? op[1] : void 0,\n done: true\n };\n }\n};\n/*\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 */\n// import '../Common/Polyfills';\nimport * as Observable from 'zen-observable';\nimport { ConsoleLogger as Logger } from '@aws-amplify/core';\nimport { INTERNAL_AWS_APPSYNC_PUBSUB_PROVIDER } from '@aws-amplify/core/lib/constants';\nimport { AWSAppSyncProvider } from './Providers';\nvar logger = new Logger('PubSub');\nvar PubSub = /** @class */function () {\n /**\n * Initialize PubSub with AWS configurations\n *\n * @param {PubSubOptions} options - Configuration object for PubSub\n */\n function PubSub(options) {\n this._options = options;\n logger.debug('PubSub Options', this._options);\n this._pluggables = [];\n this.subscribe = this.subscribe.bind(this);\n }\n Object.defineProperty(PubSub.prototype, \"awsAppSyncProvider\", {\n /**\n * Lazy instantiate awsAppSyncProvider when it is required by the API category\n */\n get: function get() {\n if (!this._awsAppSyncProvider) {\n this._awsAppSyncProvider = new AWSAppSyncProvider(this._options);\n }\n return this._awsAppSyncProvider;\n },\n enumerable: true,\n configurable: true\n });\n PubSub.prototype.getModuleName = function () {\n return 'PubSub';\n };\n /**\n * Configure PubSub part with configurations\n *\n * @param {PubSubOptions} config - Configuration for PubSub\n * @return {Object} - The current configuration\n */\n PubSub.prototype.configure = function (options) {\n var _this = this;\n var opt = options ? options.PubSub || options : {};\n logger.debug('configure PubSub', {\n opt: opt\n });\n this._options = Object.assign({}, this._options, opt);\n this._pluggables.map(function (pluggable) {\n return pluggable.configure(_this._options);\n });\n return this._options;\n };\n /**\n * add plugin into Analytics category\n * @param {Object} pluggable - an instance of the plugin\n */\n PubSub.prototype.addPluggable = function (pluggable) {\n return __awaiter(this, void 0, void 0, function () {\n var config;\n return __generator(this, function (_a) {\n if (pluggable && pluggable.getCategory() === 'PubSub') {\n this._pluggables.push(pluggable);\n config = pluggable.configure(this._options);\n return [2 /*return*/, config];\n }\n return [2 /*return*/];\n });\n });\n };\n PubSub.prototype.getProviderByName = function (providerName) {\n if (providerName === INTERNAL_AWS_APPSYNC_PUBSUB_PROVIDER) {\n return this.awsAppSyncProvider;\n }\n return this._pluggables.find(function (pluggable) {\n return pluggable.getProviderName() === providerName;\n });\n };\n PubSub.prototype.getProviders = function (options) {\n if (options === void 0) {\n options = {};\n }\n var providerName = options.provider;\n if (!providerName) {\n return this._pluggables;\n }\n var provider = this.getProviderByName(providerName);\n if (!provider) {\n throw new Error(\"Could not find provider named \" + providerName);\n }\n return [provider];\n };\n PubSub.prototype.publish = function (topics, msg, options) {\n return __awaiter(this, void 0, void 0, function () {\n return __generator(this, function (_a) {\n return [2 /*return*/, Promise.all(this.getProviders(options).map(function (provider) {\n return provider.publish(topics, msg, options);\n }))];\n });\n });\n };\n PubSub.prototype.subscribe = function (topics, options) {\n logger.debug('subscribe options', options);\n var providers = this.getProviders(options);\n return new Observable(function (observer) {\n var observables = providers.map(function (provider) {\n return {\n provider: provider,\n observable: provider.subscribe(topics, options)\n };\n });\n var subscriptions = observables.map(function (_a) {\n var provider = _a.provider,\n observable = _a.observable;\n return observable.subscribe({\n start: console.error,\n next: function next(value) {\n return observer.next({\n provider: provider,\n value: value\n });\n },\n error: function error(_error) {\n return observer.error({\n provider: provider,\n error: _error\n });\n }\n });\n });\n return function () {\n return subscriptions.forEach(function (subscription) {\n return subscription.unsubscribe();\n });\n };\n });\n };\n return PubSub;\n}();\nexport default PubSub;","/*\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 */\nimport PubSubClass from './PubSub';\nimport Amplify, { ConsoleLogger as Logger } from '@aws-amplify/core';\nvar logger = new Logger('PubSub');\nvar _instance = null;\nif (!_instance) {\n logger.debug('Create PubSub Instance');\n _instance = new PubSubClass(null);\n}\nvar PubSub = _instance;\nAmplify.register(PubSub);\nexport default PubSub;\nexport * from './Providers/AWSIotProvider';\nexport { PubSubClass };","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)) t[p] = s[p];\n }\n return t;\n };\n return __assign.apply(this, arguments);\n};\nvar __spreadArrays = this && this.__spreadArrays || function () {\n for (var s = 0, i = 0, il = arguments.length; i < il; i++) s += arguments[i].length;\n for (var r = Array(s), k = 0, i = 0; i < il; i++) for (var a = arguments[i], j = 0, jl = a.length; j < jl; j++, k++) r[k] = a[j];\n return r;\n};\nimport { ConsoleLogger as Logger } from '@aws-amplify/core';\nvar logger = new Logger('Predictions');\nvar Predictions = /** @class */function () {\n /**\n * Initialize Predictions with AWS configurations\n * @param {PredictionsOptions} options - Configuration object for Predictions\n */\n function Predictions(options) {\n this._options = options;\n this._convertPluggables = [];\n this._identifyPluggables = [];\n this._interpretPluggables = [];\n }\n Predictions.prototype.getModuleName = function () {\n return 'Predictions';\n };\n /**\n * add plugin/pluggable into Predictions category\n * @param {Object} pluggable - an instance of the plugin/pluggable\n **/\n Predictions.prototype.addPluggable = function (pluggable) {\n if (this.getPluggable(pluggable.getProviderName())) {\n throw new Error(\"Pluggable with name \" + pluggable.getProviderName() + \" has already been added.\");\n }\n var pluggableAdded = false;\n if (this.implementsConvertPluggable(pluggable)) {\n this._convertPluggables.push(pluggable);\n pluggableAdded = true;\n }\n if (this.implementsIdentifyPluggable(pluggable)) {\n this._identifyPluggables.push(pluggable);\n pluggableAdded = true;\n }\n if (this.implementsInterpretPluggable(pluggable)) {\n this._interpretPluggables.push(pluggable);\n pluggableAdded = true;\n }\n if (pluggableAdded) {\n this.configurePluggable(pluggable);\n }\n };\n /**\n * Get the plugin object\n * @param providerName - the name of the plugin\n */\n Predictions.prototype.getPluggable = function (providerName) {\n var pluggable = this.getAllProviders().find(function (pluggable) {\n return pluggable.getProviderName() === providerName;\n });\n if (pluggable === undefined) {\n logger.debug('No plugin found with providerName=>', providerName);\n return null;\n } else return pluggable;\n };\n /**\n * Remove the plugin object\n * @param providerName - the name of the plugin\n */\n Predictions.prototype.removePluggable = function (providerName) {\n this._convertPluggables = this._convertPluggables.filter(function (pluggable) {\n return pluggable.getProviderName() !== providerName;\n });\n this._identifyPluggables = this._identifyPluggables.filter(function (pluggable) {\n return pluggable.getProviderName() !== providerName;\n });\n this._interpretPluggables = this._interpretPluggables.filter(function (pluggable) {\n return pluggable.getProviderName() !== providerName;\n });\n return;\n };\n /**\n * To make both top level providers and category level providers work with same interface and configuration\n * this method duplicates Predictions config into parent level config (for top level provider) and\n * category level config (such as convert, identify etc) and pass both to each provider.\n */\n Predictions.prototype.configure = function (options) {\n var _this = this;\n var predictionsConfig = options ? options.predictions || options : {};\n predictionsConfig = __assign(__assign({}, predictionsConfig), options);\n this._options = Object.assign({}, this._options, predictionsConfig);\n logger.debug('configure Predictions', this._options);\n this.getAllProviders().forEach(function (pluggable) {\n return _this.configurePluggable(pluggable);\n });\n };\n Predictions.prototype.interpret = function (input, options) {\n var pluggableToExecute = this.getPluggableToExecute(this._interpretPluggables, options);\n return pluggableToExecute.interpret(input);\n };\n Predictions.prototype.convert = function (input, options) {\n var pluggableToExecute = this.getPluggableToExecute(this._convertPluggables, options);\n return pluggableToExecute.convert(input);\n };\n Predictions.prototype.identify = function (input, options) {\n var pluggableToExecute = this.getPluggableToExecute(this._identifyPluggables, options);\n return pluggableToExecute.identify(input);\n };\n // tslint:disable-next-line: max-line-length\n Predictions.prototype.getPluggableToExecute = function (pluggables, providerOptions) {\n // Give preference to provider name first since it is more specific to this call, even if\n // there is only one provider configured to error out if the name provided is not the one matched.\n if (providerOptions && providerOptions.providerName) {\n return __spreadArrays(pluggables).find(function (pluggable) {\n return pluggable.getProviderName() === providerOptions.providerName;\n });\n } else {\n if (pluggables.length === 1) {\n return pluggables[0];\n } else {\n throw new Error('More than one or no providers are configured, ' + 'Either specify a provider name or configure exactly one provider');\n }\n }\n };\n Predictions.prototype.getAllProviders = function () {\n return __spreadArrays(this._convertPluggables, this._identifyPluggables, this._interpretPluggables);\n };\n Predictions.prototype.configurePluggable = function (pluggable) {\n var categoryConfig = Object.assign({}, this._options['predictions'],\n // Parent predictions config for the top level provider\n this._options[pluggable.getCategory().toLowerCase()] // Actual category level config\n );\n pluggable.configure(categoryConfig);\n };\n Predictions.prototype.implementsConvertPluggable = function (obj) {\n return obj && typeof obj.convert === 'function';\n };\n Predictions.prototype.implementsIdentifyPluggable = function (obj) {\n return obj && typeof obj.identify === 'function';\n };\n Predictions.prototype.implementsInterpretPluggable = function (obj) {\n return obj && typeof obj.interpret === 'function';\n };\n return Predictions;\n}();\nexport default Predictions;","/**\n * Changes object keys to camel case. If optional parameter `keys` is given, then we extract only the\n * keys specified in `keys`.\n */\nexport function makeCamelCase(obj, keys) {\n if (!obj) return undefined;\n var newObj = {};\n var keysToRename = keys ? keys : Object.keys(obj);\n keysToRename.forEach(function (key) {\n var _a;\n if (obj.hasOwnProperty(key)) {\n // change the key to camelcase.\n var camelCaseKey = key.charAt(0).toLowerCase() + key.substr(1);\n Object.assign(newObj, (_a = {}, _a[camelCaseKey] = obj[key], _a));\n }\n });\n return newObj;\n}\n/**\n * Given an array of object, call makeCamelCase(...) on each option.\n */\nexport function makeCamelCaseArray(objArr, keys) {\n if (!objArr) return undefined;\n return objArr.map(function (obj) {\n return makeCamelCase(obj, keys);\n });\n}\n/**\n * Converts blob to array buffer\n */\nexport function blobToArrayBuffer(blob) {\n return new Promise(function (res, rej) {\n var reader = new FileReader();\n reader.onload = function (_event) {\n res(reader.result);\n };\n reader.onerror = function (err) {\n rej(err);\n };\n try {\n reader.readAsArrayBuffer(blob);\n } catch (err) {\n rej(err); // in case user gives invalid type\n }\n });\n}","import { makeCamelCaseArray, makeCamelCase } from './Utils';\nfunction getBoundingBox(geometry) {\n if (!geometry) return undefined;\n return makeCamelCase(geometry.BoundingBox);\n}\nfunction getPolygon(geometry) {\n if (!geometry) return undefined;\n return makeCamelCaseArray(geometry.Polygon);\n}\n/**\n * Organizes blocks from Rekognition API to each of the categories and and structures\n * their data accordingly.\n * @param {Textract.BlockList} source - Array containing blocks returned from Textract API.\n * @return {IdentifyTextOutput} - Object that categorizes each block and its information.\n */\nexport function categorizeRekognitionBlocks(blocks) {\n // Skeleton IdentifyText API response. We will populate it as we iterate through blocks.\n var response = {\n text: {\n fullText: '',\n words: [],\n lines: [],\n linesDetailed: []\n }\n };\n // We categorize each block by running a forEach loop through them.\n blocks.forEach(function (block) {\n switch (block.Type) {\n case 'LINE':\n response.text.lines.push(block.DetectedText);\n response.text.linesDetailed.push({\n text: block.DetectedText,\n polygon: getPolygon(block.Geometry),\n boundingBox: getBoundingBox(block.Geometry),\n page: null\n });\n break;\n case 'WORD':\n response.text.fullText += block.DetectedText + ' ';\n response.text.words.push({\n text: block.DetectedText,\n polygon: getPolygon(block.Geometry),\n boundingBox: getBoundingBox(block.Geometry)\n });\n break;\n }\n });\n // remove trailing space of fullText\n response.text.fullText = response.text.fullText.substr(0, response.text.fullText.length - 1);\n return response;\n}\n/**\n * Organizes blocks from Textract API to each of the categories and and structures\n * their data accordingly.\n * @param {Textract.BlockList} source - Array containing blocks returned from Textract API.\n * @return {IdentifyTextOutput} - Object that categorizes each block and its information.\n */\nexport function categorizeTextractBlocks(blocks) {\n // Skeleton IdentifyText API response. We will populate it as we iterate through blocks.\n var response = {\n text: {\n fullText: '',\n words: [],\n lines: [],\n linesDetailed: []\n }\n };\n // if blocks is an empty array, ie. textract did not detect anything, return empty response.\n if (blocks.length === 0) return response;\n /**\n * We categorize each of the blocks by running a forEach loop through them.\n *\n * For complex structures such as Tables and KeyValue, we need to trasverse through their children. To do so,\n * we will post-process them after the for each loop. We do this by storing table and keyvalues in arrays and\n * mapping other blocks in `blockMap` (id to block) so we can reference them easily later.\n *\n * Note that we do not map `WORD` and `TABLE` in `blockMap` because they will not be referenced by any other\n * block except the Page block.\n */\n var tableBlocks = Array();\n var keyValueBlocks = Array();\n var blockMap = {};\n blocks.forEach(function (block) {\n switch (block.BlockType) {\n case 'LINE':\n response.text.lines.push(block.Text);\n response.text.linesDetailed.push({\n text: block.Text,\n polygon: getPolygon(block.Geometry),\n boundingBox: getBoundingBox(block.Geometry),\n page: block.Page\n });\n break;\n case 'WORD':\n response.text.fullText += block.Text + ' ';\n response.text.words.push({\n text: block.Text,\n polygon: getPolygon(block.Geometry),\n boundingBox: getBoundingBox(block.Geometry)\n });\n blockMap[block.Id] = block;\n break;\n case 'SELECTION_ELEMENT':\n var selectionStatus = block.SelectionStatus === 'SELECTED' ? true : false;\n if (!response.text.selections) response.text.selections = [];\n response.text.selections.push({\n selected: selectionStatus,\n polygon: getPolygon(block.Geometry),\n boundingBox: getBoundingBox(block.Geometry)\n });\n blockMap[block.Id] = block;\n break;\n case 'TABLE':\n tableBlocks.push(block);\n break;\n case 'KEY_VALUE_SET':\n keyValueBlocks.push(block);\n blockMap[block.Id] = block;\n break;\n default:\n blockMap[block.Id] = block;\n }\n });\n // remove trailing space in fullText\n response.text.fullText = response.text.fullText.substr(0, response.text.fullText.length - 1);\n // Post-process complex structures if they exist.\n if (tableBlocks.length !== 0) {\n var tableResponse_1 = Array();\n tableBlocks.forEach(function (table) {\n tableResponse_1.push(constructTable(table, blockMap));\n });\n response.text.tables = tableResponse_1;\n }\n if (keyValueBlocks.length !== 0) {\n var keyValueResponse_1 = Array();\n keyValueBlocks.forEach(function (keyValue) {\n // We need the KeyValue blocks of EntityType = `KEY`, which has both key and value references.\n if (keyValue.EntityTypes.indexOf('KEY') !== -1) {\n keyValueResponse_1.push(constructKeyValue(keyValue, blockMap));\n }\n });\n response.text.keyValues = keyValueResponse_1;\n }\n return response;\n}\n/**\n * Constructs a table object using data from its children cells.\n * @param {Textract.Block} table - Table block that has references (`Relationships`) to its cells\n * @param {[id: string]: Textract.Block} blockMap - Maps block Ids to blocks.\n */\nexport function constructTable(table, blockMap) {\n var tableMatrix;\n tableMatrix = [];\n // visit each of the cell associated with the table's relationship.\n table.Relationships.forEach(function (tableRelation) {\n tableRelation.Ids.forEach(function (cellId) {\n var cellBlock = blockMap[cellId];\n var row = cellBlock.RowIndex - 1; // textract starts indexing at 1, so subtract it by 1.\n var col = cellBlock.ColumnIndex - 1; // textract starts indexing at 1, so subtract it by 1.\n // extract data contained inside the cell.\n var content = extractContentsFromBlock(cellBlock, blockMap);\n var cell = {\n text: content.text,\n boundingBox: getBoundingBox(cellBlock.Geometry),\n polygon: getPolygon(cellBlock.Geometry),\n selected: content.selected,\n rowSpan: cellBlock.RowSpan,\n columnSpan: cellBlock.ColumnSpan\n };\n if (!tableMatrix[row]) tableMatrix[row] = [];\n tableMatrix[row][col] = cell;\n });\n });\n var rowSize = tableMatrix.length;\n var columnSize = tableMatrix[0].length;\n // Note that we leave spanned cells undefined for distinction\n return {\n size: {\n rows: rowSize,\n columns: columnSize\n },\n table: tableMatrix,\n boundingBox: getBoundingBox(table.Geometry),\n polygon: getPolygon(table.Geometry)\n };\n}\n/**\n * Constructs a key value object from its children key and value blocks.\n * @param {Textract.Block} KeyValue - KeyValue block that has references (`Relationships`) to its children.\n * @param {[id: string]: Textract.Block} blockMap - Maps block Ids to blocks.\n */\nexport function constructKeyValue(keyBlock, blockMap) {\n var keyText = '';\n var valueText = '';\n var valueSelected;\n keyBlock.Relationships.forEach(function (keyValueRelation) {\n if (keyValueRelation.Type === 'CHILD') {\n // relation refers to key\n var contents = extractContentsFromBlock(keyBlock, blockMap);\n keyText = contents.text;\n } else if (keyValueRelation.Type === 'VALUE') {\n // relation refers to value\n keyValueRelation.Ids.forEach(function (valueId) {\n var valueBlock = blockMap[valueId];\n var contents = extractContentsFromBlock(valueBlock, blockMap);\n valueText = contents.text;\n if (contents.selected != null) valueSelected = contents.selected;\n });\n }\n });\n return {\n key: keyText,\n value: {\n text: valueText,\n selected: valueSelected\n },\n polygon: getPolygon(keyBlock.Geometry),\n boundingBox: getBoundingBox(keyBlock.Geometry)\n };\n}\n/**\n * Extracts text and selection from input block's children.\n * @param {Textract.Block}} block - Block that we want to extract contents from.\n * @param {[id: string]: Textract.Block} blockMap - Maps block Ids to blocks.\n */\nexport function extractContentsFromBlock(block, blockMap) {\n var words = '';\n var isSelected;\n if (!block.Relationships) {\n // some block might have no content\n return {\n text: '',\n selected: undefined\n };\n }\n block.Relationships.forEach(function (relation) {\n relation.Ids.forEach(function (contentId) {\n var contentBlock = blockMap[contentId];\n if (contentBlock.BlockType === 'WORD') {\n words += contentBlock.Text + ' ';\n } else if (contentBlock.BlockType === 'SELECTION_ELEMENT') {\n isSelected = contentBlock.SelectionStatus === 'SELECTED' ? true : false;\n }\n });\n });\n words = words.substr(0, words.length - 1); // remove trailing space.\n return {\n text: words,\n selected: isSelected\n };\n}","var __extends = this && this.__extends || function () {\n var _extendStatics = function extendStatics(d, b) {\n _extendStatics = Object.setPrototypeOf || {\n __proto__: []\n } instanceof Array && function (d, b) {\n d.__proto__ = b;\n } || function (d, b) {\n for (var p in b) if (b.hasOwnProperty(p)) d[p] = b[p];\n };\n return _extendStatics(d, b);\n };\n return function (d, b) {\n _extendStatics(d, b);\n function __() {\n this.constructor = d;\n }\n d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());\n };\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)) 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) {\n return value instanceof P ? value : new P(function (resolve) {\n resolve(value);\n });\n }\n return new (P || (P = Promise))(function (resolve, reject) {\n function fulfilled(value) {\n try {\n step(generator.next(value));\n } catch (e) {\n reject(e);\n }\n }\n function rejected(value) {\n try {\n step(generator[\"throw\"](value));\n } catch (e) {\n reject(e);\n }\n }\n function step(result) {\n result.done ? resolve(result.value) : adopt(result.value).then(fulfilled, rejected);\n }\n step((generator = generator.apply(thisArg, _arguments || [])).next());\n });\n};\nvar __generator = this && this.__generator || function (thisArg, body) {\n var _ = {\n label: 0,\n sent: function sent() {\n if (t[0] & 1) throw t[1];\n return t[1];\n },\n trys: [],\n ops: []\n },\n f,\n y,\n t,\n g;\n return g = {\n next: verb(0),\n \"throw\": verb(1),\n \"return\": verb(2)\n }, typeof Symbol === \"function\" && (g[Symbol.iterator] = function () {\n return this;\n }), g;\n function verb(n) {\n return function (v) {\n return step([n, v]);\n };\n }\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:\n case 1:\n t = op;\n break;\n case 4:\n _.label++;\n return {\n value: op[1],\n done: false\n };\n case 5:\n _.label++;\n y = op[1];\n op = [0];\n continue;\n case 7:\n op = _.ops.pop();\n _.trys.pop();\n continue;\n default:\n if (!(t = _.trys, t = t.length > 0 && t[t.length - 1]) && (op[0] === 6 || op[0] === 2)) {\n _ = 0;\n continue;\n }\n if (op[0] === 3 && (!t || op[1] > t[0] && op[1] < t[3])) {\n _.label = op[1];\n break;\n }\n if (op[0] === 6 && _.label < t[1]) {\n _.label = t[1];\n t = op;\n break;\n }\n if (t && _.label < t[2]) {\n _.label = t[2];\n _.ops.push(op);\n break;\n }\n if (t[2]) _.ops.pop();\n _.trys.pop();\n continue;\n }\n op = body.call(thisArg, _);\n } catch (e) {\n op = [6, e];\n y = 0;\n } finally {\n f = t = 0;\n }\n if (op[0] & 5) throw op[1];\n return {\n value: op[0] ? op[1] : void 0,\n done: true\n };\n }\n};\nimport { Credentials } from '@aws-amplify/core';\nimport Storage from '@aws-amplify/storage';\nimport { AbstractIdentifyPredictionsProvider } from '../types/Providers';\nimport * as Rekognition from 'aws-sdk/clients/rekognition';\nimport { isStorageSource, isFileSource, isBytesSource, isIdentifyCelebrities, isIdentifyFromCollection } from '../types';\nimport * as Textract from 'aws-sdk/clients/textract';\nimport { makeCamelCase, makeCamelCaseArray, blobToArrayBuffer } from './Utils';\nimport { categorizeRekognitionBlocks, categorizeTextractBlocks } from './IdentifyTextUtils';\nvar AmazonAIIdentifyPredictionsProvider = /** @class */function (_super) {\n __extends(AmazonAIIdentifyPredictionsProvider, _super);\n function AmazonAIIdentifyPredictionsProvider() {\n return _super.call(this) || this;\n }\n AmazonAIIdentifyPredictionsProvider.prototype.getProviderName = function () {\n return 'AmazonAIIdentifyPredictionsProvider';\n };\n /**\n * Verify user input source and converts it into source object readable by Rekognition and Textract.\n * Note that Rekognition and Textract use the same source interface, so we need not worry about types.\n * @param {IdentifySource} source - User input source that directs to the object user wants\n * to identify (storage, file, or bytes).\n * @return {Promise' + 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 () {\n return arguments;\n }()) ? baseIsArguments : function (value) {\n return isObjectLike(value) && hasOwnProperty.call(value, 'callee') && !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 || 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) && (isArray(value) || typeof value == 'string' || typeof value.splice == 'function' || 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 || 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' && 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' || 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 && 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' || !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' || 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 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 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 = baseTrim(value);\n var isBinary = reIsBinary.test(value);\n return isBinary || reIsOctal.test(value) ? freeParseInt(value.slice(2), isBinary ? 2 : 8) : 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 ? baseClamp(toInteger(value), -MAX_SAFE_INTEGER, MAX_SAFE_INTEGER) : 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 var index = -1;\n var length = sources.length;\n var guard = length > 2 ? sources[2] : undefined;\n if (guard && isIterateeCall(sources[0], sources[1], guard)) {\n length = 1;\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 while (++propsIndex < propsLength) {\n var key = props[propsIndex];\n var value = object[key];\n if (value === undefined || eq(value, objectProto[key]) && !hasOwnProperty.call(object, key)) {\n object[key] = source[key];\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 ? object : 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 ? object : 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 && typeof value.toString != 'function') {\n value = nativeObjectToString.call(value);\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 && typeof value.toString != 'function') {\n value = nativeObjectToString.call(value);\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 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 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 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 iteratee = getIteratee(iteratee, 4);\n if (accumulator == null) {\n var Ctor = object && object.constructor;\n if (isArrLike) {\n accumulator = isArr ? new Ctor() : [];\n } else if (isObject(object)) {\n accumulator = isFunction(Ctor) ? baseCreate(getPrototype(object)) : {};\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 } 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 } 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 var length = string.length;\n position = position === undefined ? length : baseClamp(toInteger(position), 0, length);\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) ? string.replace(reUnescapedHtml, escapeHtmlChar) : 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) ? string.replace(reRegExpChar, '\\\\$&') : 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 var strLength = length ? stringSize(string) : 0;\n if (!length || strLength >= length) {\n return string;\n }\n var mid = (length - strLength) / 2;\n return createPadding(nativeFloor(mid), chars) + string + createPadding(nativeCeil(mid), chars);\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 var strLength = length ? stringSize(string) : 0;\n return length && strLength < length ? string + createPadding(length - strLength, chars) : 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 var strLength = length ? stringSize(string) : 0;\n return length && strLength < length ? createPadding(length - strLength, chars) + string : 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 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 && (typeof separator == 'string' || separator != null && !isRegExp(separator))) {\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 ? 0 : baseClamp(toInteger(position), 0, string.length);\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': '