Visible for testing.\r\n */\r\nfunction setAbortableTimeout(signal, throttleEndTimeMillis) {\r\n return new Promise((resolve, reject) => {\r\n // Derives backoff from given end time, normalizing negative numbers to zero.\r\n const backoffMillis = Math.max(throttleEndTimeMillis - Date.now(), 0);\r\n const timeout = setTimeout(resolve, backoffMillis);\r\n // Adds listener, rather than sets onabort, because signal is a shared object.\r\n signal.addEventListener(() => {\r\n clearTimeout(timeout);\r\n // If the request completes before this timeout, the rejection has no effect.\r\n reject(ERROR_FACTORY.create(\"fetch-throttle\" /* FETCH_THROTTLE */, {\r\n throttleEndTimeMillis\r\n }));\r\n });\r\n });\r\n}\r\n/**\r\n * Returns true if the {@link Error} indicates a fetch request may succeed later.\r\n */\r\nfunction isRetriableError(e) {\r\n if (!(e instanceof FirebaseError) || !e.customData) {\r\n return false;\r\n }\r\n // Uses string index defined by ErrorData, which FirebaseError implements.\r\n const httpStatus = Number(e.customData['httpStatus']);\r\n return (httpStatus === 429 ||\r\n httpStatus === 500 ||\r\n httpStatus === 503 ||\r\n httpStatus === 504);\r\n}\r\n/**\r\n * Shims a minimal AbortSignal (copied from Remote Config).\r\n *\r\n *
AbortController's AbortSignal conveniently decouples fetch timeout logic from other aspects\r\n * of networking, such as retries. Firebase doesn't use AbortController enough to justify a\r\n * polyfill recommendation, like we do with the Fetch API, but this minimal shim can easily be\r\n * swapped out if/when we do.\r\n */\r\nclass AnalyticsAbortSignal {\r\n constructor() {\r\n this.listeners = [];\r\n }\r\n addEventListener(listener) {\r\n this.listeners.push(listener);\r\n }\r\n abort() {\r\n this.listeners.forEach(listener => listener());\r\n }\r\n}\n\n/**\r\n * @license\r\n * Copyright 2020 Google LLC\r\n *\r\n * Licensed under the Apache License, Version 2.0 (the \"License\");\r\n * you may not use this file except in compliance with the License.\r\n * You may obtain a copy of the License at\r\n *\r\n * http://www.apache.org/licenses/LICENSE-2.0\r\n *\r\n * Unless required by applicable law or agreed to in writing, software\r\n * distributed under the License is distributed on an \"AS IS\" BASIS,\r\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\r\n * See the License for the specific language governing permissions and\r\n * limitations under the License.\r\n */\r\nasync function validateIndexedDB() {\r\n if (!isIndexedDBAvailable()) {\r\n logger.warn(ERROR_FACTORY.create(\"indexeddb-unavailable\" /* INDEXEDDB_UNAVAILABLE */, {\r\n errorInfo: 'IndexedDB is not available in this environment.'\r\n }).message);\r\n return false;\r\n }\r\n else {\r\n try {\r\n await validateIndexedDBOpenable();\r\n }\r\n catch (e) {\r\n logger.warn(ERROR_FACTORY.create(\"indexeddb-unavailable\" /* INDEXEDDB_UNAVAILABLE */, {\r\n errorInfo: e\r\n }).message);\r\n return false;\r\n }\r\n }\r\n return true;\r\n}\r\n/**\r\n * Initialize the analytics instance in gtag.js by calling config command with fid.\r\n *\r\n * NOTE: We combine analytics initialization and setting fid together because we want fid to be\r\n * part of the `page_view` event that's sent during the initialization\r\n * @param app Firebase app\r\n * @param gtagCore The gtag function that's not wrapped.\r\n * @param dynamicConfigPromisesList Array of all dynamic config promises.\r\n * @param measurementIdToAppId Maps measurementID to appID.\r\n * @param installations _FirebaseInstallationsInternal instance.\r\n *\r\n * @returns Measurement ID.\r\n */\r\nasync function _initializeAnalytics(app, dynamicConfigPromisesList, measurementIdToAppId, installations, gtagCore, dataLayerName, options) {\r\n var _a;\r\n const dynamicConfigPromise = fetchDynamicConfigWithRetry(app);\r\n // Once fetched, map measurementIds to appId, for ease of lookup in wrapped gtag function.\r\n dynamicConfigPromise\r\n .then(config => {\r\n measurementIdToAppId[config.measurementId] = config.appId;\r\n if (app.options.measurementId &&\r\n config.measurementId !== app.options.measurementId) {\r\n logger.warn(`The measurement ID in the local Firebase config (${app.options.measurementId})` +\r\n ` does not match the measurement ID fetched from the server (${config.measurementId}).` +\r\n ` To ensure analytics events are always sent to the correct Analytics property,` +\r\n ` update the` +\r\n ` measurement ID field in the local config or remove it from the local config.`);\r\n }\r\n })\r\n .catch(e => logger.error(e));\r\n // Add to list to track state of all dynamic config promises.\r\n dynamicConfigPromisesList.push(dynamicConfigPromise);\r\n const fidPromise = validateIndexedDB().then(envIsValid => {\r\n if (envIsValid) {\r\n return installations.getId();\r\n }\r\n else {\r\n return undefined;\r\n }\r\n });\r\n const [dynamicConfig, fid] = await Promise.all([\r\n dynamicConfigPromise,\r\n fidPromise\r\n ]);\r\n // Detect if user has already put the gtag