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{"version":3,"file":"workbox-expiration.prod.js","sources":["../_version.mjs","../models/CacheTimestampsModel.mjs","../CacheExpiration.mjs","../Plugin.mjs"],"sourcesContent":["try{self['workbox:expiration:4.3.1']&&_()}catch(e){}// eslint-disable-line","/*\n Copyright 2018 Google LLC\n\n Use of this source code is governed by an MIT-style\n license that can be found in the LICENSE file or at\n https://opensource.org/licenses/MIT.\n*/\n\nimport {DBWrapper} from 'workbox-core/_private/DBWrapper.mjs';\nimport {deleteDatabase} from 'workbox-core/_private/deleteDatabase.mjs';\nimport '../_version.mjs';\n\n\nconst DB_NAME = 'workbox-expiration';\nconst OBJECT_STORE_NAME = 'cache-entries';\n\nconst normalizeURL = (unNormalizedUrl) => {\n const url = new URL(unNormalizedUrl, location);\n url.hash = '';\n\n return url.href;\n};\n\n\n/**\n * Returns the timestamp model.\n *\n * @private\n */\nclass CacheTimestampsModel {\n /**\n *\n * @param {string} cacheName\n *\n * @private\n */\n constructor(cacheName) {\n this._cacheName = cacheName;\n\n this._db = new DBWrapper(DB_NAME, 1, {\n onupgradeneeded: (event) => this._handleUpgrade(event),\n });\n }\n\n /**\n * Should perform an upgrade of indexedDB.\n *\n * @param {Event} event\n *\n * @private\n */\n _handleUpgrade(event) {\n const db = event.target.result;\n\n // TODO(philipwalton): EdgeHTML doesn't support arrays as a keyPath, so we\n // have to use the `id` keyPath here and create our own values (a\n // concatenation of `url + cacheName`) instead of simply using\n // `keyPath: ['url', 'cacheName']`, which is supported in other browsers.\n const objStore = db.createObjectStore(OBJECT_STORE_NAME, {keyPath: 'id'});\n\n // TODO(philipwalton): once we don't have to support EdgeHTML, we can\n // create a single index with the keyPath `['cacheName', 'timestamp']`\n // instead of doing both these indexes.\n objStore.createIndex('cacheName', 'cacheName', {unique: false});\n objStore.createIndex('timestamp', 'timestamp', {unique: false});\n\n // Previous versions of `workbox-expiration` used `this._cacheName`\n // as the IDBDatabase name.\n deleteDatabase(this._cacheName);\n }\n\n /**\n * @param {string} url\n * @param {number} timestamp\n *\n * @private\n */\n async setTimestamp(url, timestamp) {\n url = normalizeURL(url);\n\n await this._db.put(OBJECT_STORE_NAME, {\n url,\n timestamp,\n cacheName: this._cacheName,\n // Creating an ID from the URL and cache name won't be necessary once\n // Edge switches to Chromium and all browsers we support work with\n // array keyPaths.\n id: this._getId(url),\n });\n }\n\n /**\n * Returns the timestamp stored for a given URL.\n *\n * @param {string} url\n * @return {number}\n *\n * @private\n */\n async getTimestamp(url) {\n const entry = await this._db.get(OBJECT_STORE_NAME, this._getId(url));\n return entry.timestamp;\n }\n\n /**\n * Iterates through all the entries in the object store (from newest to\n * oldest) and removes entries once either `maxCount` is reached or the\n * entry's timestamp is less than `minTimestamp`.\n *\n * @param {number} minTimestamp\n * @param {number} maxCount\n *\n * @private\n */\n async expireEntries(minTimestamp, maxCount) {\n const entriesToDelete = await this._db.transaction(\n OBJECT_STORE_NAME, 'readwrite', (txn, done) => {\n const store = txn.objectStore(OBJECT_STORE_NAME);\n const entriesToDelete = [];\n let entriesNotDeletedCount = 0;\n\n store.index('timestamp')\n .openCursor(null, 'prev')\n .onsuccess = ({target}) => {\n const cursor = target.result;\n if (cursor) {\n const result = cursor.value;\n // TODO(philipwalton): once we can use a multi-key index, we\n // won't have to check `cacheName` here.\n if (result.cacheName === this._cacheName) {\n
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