{“version”:3,“file”:“workbox-background-sync.dev.js”,“sources”:,“sourcesContent”:[“"use strict";n// @ts-ignorentry {n self && _();n}ncatch (e) { }n”,“/*n Copyright 2018 Google LLCnn Use of this source code is governed by an MIT-stylen license that can be found in the LICENSE file or atn opensource.org/licenses/MIT.n*/nimport { assert } from 'workbox-core/_private/assert.js';nimport { DBWrapper } from 'workbox-core/_private/DBWrapper.js';nimport '../_version.js';nconst DB_VERSION = 3;nconst DB_NAME = 'workbox-background-sync';nconst OBJECT_STORE_NAME = 'requests';nconst INDEXED_PROP = 'queueName';n/**n * A class to manage storing requests from a Queue in IndexedDB,n * indexed by their queue name for easier access.n *n * @privaten */nexport class QueueStore {n /**n * Associates this instance with a Queue instance, so entries added can ben * identified by their queue name.n *n * @param {string} queueNamen * @privaten */n constructor(queueName) {n this._queueName = queueName;n this._db = new DBWrapper(DB_NAME, DB_VERSION, {n onupgradeneeded: this._upgradeDb,n });n }n /**n * Append an entry last in the queue.n *n * @param {Object} entryn * @param {Object} entry.requestDatan * @param {number} [entry.timestamp]n * @param {Object} [entry.metadata]n * @privaten */n async pushEntry(entry) {n if (process.env.NODE_ENV !== 'production') {n assert.isType(entry, 'object', {n moduleName: 'workbox-background-sync',n className: 'QueueStore',n funcName: 'pushEntry',n paramName: 'entry',n });n assert.isType(entry.requestData, 'object', {n moduleName: 'workbox-background-sync',n className: 'QueueStore',n funcName: 'pushEntry',n paramName: 'entry.requestData',n });n }n // Don't specify an ID since one is automatically generated.n delete entry.id;n entry.queueName = this._queueName;n await this._db.add(OBJECT_STORE_NAME, entry);n }n /**n * Prepend an entry first in the queue.n *n * @param {Object} entryn * @param {Object} entry.requestDatan * @param {number} [entry.timestamp]n * @param {Object} [entry.metadata]n * @privaten */n async unshiftEntry(entry) {n if (process.env.NODE_ENV !== 'production') {n assert.isType(entry, 'object', {n moduleName: 'workbox-background-sync',n className: 'QueueStore',n funcName: 'unshiftEntry',n paramName: 'entry',n });n assert.isType(entry.requestData, 'object', {n moduleName: 'workbox-background-sync',n className: 'QueueStore',n funcName: 'unshiftEntry',n paramName: 'entry.requestData',n });n }n const [firstEntry] = await this._db.getAllMatching(OBJECT_STORE_NAME, {n count: 1,n });n if (firstEntry) {n // Pick an ID one less than the lowest ID in the object store.n entry.id = firstEntry.id - 1;n }n else {n // Otherwise let the auto-incrementor assign the ID.n delete entry.id;n }n entry.queueName = this._queueName;n await this._db.add(OBJECT_STORE_NAME, entry);n }n /**n * Removes and returns the last entry in the queue matching the `queueName`.n *n * @return {Promise<Object>}n * @privaten */n async popEntry() {n return this._removeEntry({ direction: 'prev' });n }n /**n * Removes and returns the first entry in the queue matching the `queueName`.n *n * @return {Promise<Object>}n * @privaten */n async shiftEntry() {n return this._removeEntry({ direction: 'next' });n }n /**n * Returns all entries in the store matching the `queueName`.n *n * @param {Object} options See {@link module:workbox-background-sync.Queue~getAll}n * @return {Promise<Array<Object>>}n * @privaten */n async getAll() {n return await this._db.getAllMatching(OBJECT_STORE_NAME, {n index: INDEXED_PROP,n query: IDBKeyRange.only(this._queueName),n });n }n /**n * Deletes the entry for the given ID.n *n * WARNING: this method does not ensure the deleted enry belongs to thisn * queue (i.e. matches the `queueName`). But this limitation is acceptablen * as this class is not publicly exposed. An additional check would maken * this method slower than it needs to be.n *n * @privaten * @param {number} idn */n async deleteEntry(id) {n await this._db.delete(OBJECT_STORE_NAME, id);n }n /**n * Removes and returns the first or last entry in the queue (based on then * `direction` argument) matching the `queueName`.n *n * @return {Promise<Object>}n * @privaten */n async _removeEntry({ direction }) {n const [entry] = await this._db.getAllMatching(OBJECT_STORE_NAME, {n direction,n index: INDEXED_PROP,n query: IDBKeyRange.only(this._queueName),n count: 1,n });n if (entry) {n await this.deleteEntry(entry.id);n return entry;n }n }n /**n * Upgrades the database given an `upgradeneeded` event.n *n * @param {Event} eventn * @privaten */n _upgradeDb(event) {n const db = event.target.result;n if (event.oldVersion > 0 && event.oldVersion < DB_VERSION) {n if (db.objectStoreNames.contains(OBJECT_STORE_NAME)) {n db.deleteObjectStore(OBJECT_STORE_NAME);n }n }n const objStore = db.createObjectStore(OBJECT_STORE_NAME, {n autoIncrement: true,n keyPath: 'id',n });n objStore.createIndex(INDEXED_PROP, INDEXED_PROP, { unique: false });n }n}n”,“/*n Copyright 2018 Google LLCnn Use of this source code is governed by an MIT-stylen license that can be found in the LICENSE file or atn opensource.org/licenses/MIT.n*/nimport { assert } from 'workbox-core/_private/assert.js';nimport '../_version.js';nconst serializableProperties = [n 'method',n 'referrer',n 'referrerPolicy',n 'mode',n 'credentials',n 'cache',n 'redirect',n 'integrity',n 'keepalive',n];n/**n * A class to make it easier to serialize and de-serialize requests so theyn * can be stored in IndexedDB.n *n * @privaten */nclass StorableRequest {n /**n * Accepts an object of request data that can be used to construct an * `Request` but can also be stored in IndexedDB.n *n * @param {Object} requestData An object of request data that includes then * `url` plus any relevant properties ofn * [requestInit]{@link fetch.spec.whatwg.org/#requestinit}.n * @privaten */n constructor(requestData) {n if (process.env.NODE_ENV !== 'production') {n assert.isType(requestData, 'object', {n moduleName: 'workbox-background-sync',n className: 'StorableRequest',n funcName: 'constructor',n paramName: 'requestData',n });n assert.isType(requestData.url, 'string', {n moduleName: 'workbox-background-sync',n className: 'StorableRequest',n funcName: 'constructor',n paramName: 'requestData.url',n });n }n // If the request's mode is `navigate`, convert it to `same-origin` sincen // navigation requests can't be constructed via script.n if (requestData === 'navigate') {n requestData = 'same-origin';n }n this._requestData = requestData;n }n /**n * Converts a Request object to a plain object that can be structuredn * cloned or JSON-stringified.n *n * @param {Request} requestn * @return {Promise<StorableRequest>}n *n * @privaten */n static async fromRequest(request) {n const requestData = {n url: request.url,n headers: {},n };n // Set the body if present.n if (request.method !== 'GET') {n // Use ArrayBuffer to support non-text request bodies.n // NOTE: we can't use Blobs becuse Safari doesn't support storingn // Blobs in IndexedDB in some cases:n // github.com/dfahlander/Dexie.js/issues/618#issuecomment-398348457n requestData.body = await request.clone().arrayBuffer();n }n // Convert the headers from an iterable to an object.n for (const [key, value] of request.headers.entries()) {n requestData.headers = value;n }n // Add all other serializable request propertiesn for (const prop of serializableProperties) {n if (request !== undefined) {n requestData = request;n }n }n return new StorableRequest(requestData);n }n /**n * Returns a deep clone of the instances `_requestData` object.n *n * @return {Object}n *n * @privaten */n toObject() {n const requestData = Object.assign({}, this._requestData);n requestData.headers = Object.assign({}, this._requestData.headers);n if (requestData.body) {n requestData.body = requestData.body.slice(0);n }n return requestData;n }n /**n * Converts this instance to a Request.n *n * @return {Request}n *n * @privaten */n toRequest() {n return new Request(this._requestData.url, this._requestData);n }n /**n * Creates and returns a deep clone of the instance.n *n * @return {StorableRequest}n *n * @privaten */n clone() {n return new StorableRequest(this.toObject());n }n}nexport { StorableRequest };n”,“/*n Copyright 2018 Google LLCnn Use of this source code is governed by an MIT-stylen license that can be found in the LICENSE file or atn opensource.org/licenses/MIT.n*/nimport { WorkboxError } from 'workbox-core/_private/WorkboxError.js';nimport { logger } from 'workbox-core/_private/logger.js';nimport { assert } from 'workbox-core/_private/assert.js';nimport { getFriendlyURL } from 'workbox-core/_private/getFriendlyURL.js';nimport { QueueStore } from './lib/QueueStore.js';nimport { StorableRequest } from './lib/StorableRequest.js';nimport './_version.js';nconst TAG_PREFIX = 'workbox-background-sync';nconst MAX_RETENTION_TIME = 60 * 24 * 7; // 7 days in minutesnconst queueNames = new Set();n/**n * Converts a QueueStore entry into the format exposed by Queue. This entailsn * converting the request data into a real request and omitting the `id` andn * `queueName` properties.n *n * @param {Object} queueStoreEntryn * @return {Object}n * @privaten */nconst convertEntry = (queueStoreEntry) => {n const queueEntry = {n request: new StorableRequest(queueStoreEntry.requestData).toRequest(),n timestamp: queueStoreEntry.timestamp,n };n if (queueStoreEntry.metadata) {n queueEntry.metadata = queueStoreEntry.metadata;n }n return queueEntry;n};n/**n * A class to manage storing failed requests in IndexedDB and retrying themn * later. All parts of the storing and replaying process are observable vian * callbacks.n *n * @memberof module:workbox-background-syncn */nclass Queue {n /**n * Creates an instance of Queue with the given optionsn *n * @param {string} name The unique name for this queue. This name must ben * unique as it's used to register sync events and store requestsn * in IndexedDB specific to this instance. An error will be thrown ifn * a duplicate name is detected.n * @param {Object} [options]n * @param {Function} [options.onSync] A function that gets invoked whenevern * the 'sync' event fires. The function is invoked with an objectn * containing the `queue` property (referencing this instance), and youn * can use the callback to customize the replay behavior of the queue.n * When not set the `replayRequests()` method is called.n * Note: if the replay fails after a sync event, make sure you throw ann * error, so the browser knows to retry the sync event later.n * @param {number} [options.maxRetentionTime=7 days] The amount of time (inn * minutes) a request may be retried. After this amount of time hasn * passed, the request will be deleted from the queue.n */n constructor(name, { onSync, maxRetentionTime } = {}) {n this._syncInProgress = false;n this._requestsAddedDuringSync = false;n // Ensure the store name is not already being usedn if (queueNames.has(name)) {n throw new WorkboxError('duplicate-queue-name', { name });n }n else {n queueNames.add(name);n }n this._name = name;n this._onSync = onSync || this.replayRequests;n this._maxRetentionTime = maxRetentionTime || MAX_RETENTION_TIME;n this._queueStore = new QueueStore(this._name);n this._addSyncListener();n }n /**n * @return {string}n */n get name() {n return this._name;n }n /**n * Stores the passed request in IndexedDB (with its timestamp and anyn * metadata) at the end of the queue.n *n * @param {Object} entryn * @param {Request} entry.request The request to store in the queue.n * @param {Object} [entry.metadata] Any metadata you want associated with then * stored request. When requests are replayed you'll have access to thisn * metadata object in case you need to modify the request beforehand.n * @param {number} [entry.timestamp] The timestamp (Epoch time inn * milliseconds) when the request was first added to the queue. This isn * used along with `maxRetentionTime` to remove outdated requests. Inn * general you don't need to set this value, as it's automatically setn * for you (defaulting to `Date.now()`), but you can update it if youn * don't want particular requests to expire.n */n async pushRequest(entry) {n if (process.env.NODE_ENV !== 'production') {n assert.isType(entry, 'object', {n moduleName: 'workbox-background-sync',n className: 'Queue',n funcName: 'pushRequest',n paramName: 'entry',n });n assert.isInstance(entry.request, Request, {n moduleName: 'workbox-background-sync',n className: 'Queue',n funcName: 'pushRequest',n paramName: 'entry.request',n });n }n await this._addRequest(entry, 'push');n }n /**n * Stores the passed request in IndexedDB (with its timestamp and anyn * metadata) at the beginning of the queue.n *n * @param {Object} entryn * @param {Request} entry.request The request to store in the queue.n * @param {Object} [entry.metadata] Any metadata you want associated with then * stored request. When requests are replayed you'll have access to thisn * metadata object in case you need to modify the request beforehand.n * @param {number} [entry.timestamp] The timestamp (Epoch time inn * milliseconds) when the request was first added to the queue. This isn * used along with `maxRetentionTime` to remove outdated requests. Inn * general you don't need to set this value, as it's automatically setn * for you (defaulting to `Date.now()`), but you can update it if youn * don't want particular requests to expire.n */n async unshiftRequest(entry) {n if (process.env.NODE_ENV !== 'production') {n assert.isType(entry, 'object', {n moduleName: 'workbox-background-sync',n className: 'Queue',n funcName: 'unshiftRequest',n paramName: 'entry',n });n assert.isInstance(entry.request, Request, {n moduleName: 'workbox-background-sync',n className: 'Queue',n funcName: 'unshiftRequest',n paramName: 'entry.request',n });n }n await this._addRequest(entry, 'unshift');n }n /**n * Removes and returns the last request in the queue (along with itsn * timestamp and any metadata). The returned object takes the form:n * `{request, timestamp, metadata}`.n *n * @return {Promise<Object>}n */n async popRequest() {n return this._removeRequest('pop');n }n /**n * Removes and returns the first request in the queue (along with itsn * timestamp and any metadata). The returned object takes the form:n * `{request, timestamp, metadata}`.n *n * @return {Promise<Object>}n */n async shiftRequest() {n return this._removeRequest('shift');n }n /**n * Returns all the entries that have not expired (per `maxRetentionTime`).n * Any expired entries are removed from the queue.n *n * @return {Promise<Array<Object>>}n */n async getAll() {n const allEntries = await this._queueStore.getAll();n const now = Date.now();n const unexpiredEntries = [];n for (const entry of allEntries) {n // Ignore requests older than maxRetentionTime. Call this functionn // recursively until an unexpired request is found.n const maxRetentionTimeInMs = this._maxRetentionTime * 60 * 1000;n if (now - entry.timestamp > maxRetentionTimeInMs) {n await this._queueStore.deleteEntry(entry.id);n }n else {n unexpiredEntries.push(convertEntry(entry));n }n }n return unexpiredEntries;n }n /**n * Adds the entry to the QueueStore and registers for a sync event.n *n * @param {Object} entryn * @param {Request} entry.requestn * @param {Object} [entry.metadata]n * @param {number} [entry.timestamp=Date.now()]n * @param {string} operation ('push' or 'unshift')n * @privaten */n async _addRequest({ request, metadata, timestamp = Date.now(), }, operation) {n const storableRequest = await StorableRequest.fromRequest(request.clone());n const entry = {n requestData: storableRequest.toObject(),n timestamp,n };n // Only include metadata if it's present.n if (metadata) {n entry.metadata = metadata;n }n await this._queueStore(entry);n if (process.env.NODE_ENV !== 'production') {n logger.log(`Request for '${getFriendlyURL(request.url)}' has ` +n `been added to background sync queue '${this._name}'.`);n }n // Don't register for a sync if we're in the middle of a sync. Instead,n // we wait until the sync is complete and call register ifn // `this._requestsAddedDuringSync` is true.n if (this._syncInProgress) {n this._requestsAddedDuringSync = true;n }n else {n await this.registerSync();n }n }n /**n * Removes and returns the first or last (depending on `operation`) entryn * from the QueueStore that's not older than the `maxRetentionTime`.n *n * @param {string} operation ('pop' or 'shift')n * @return {Object|undefined}n * @privaten */n async _removeRequest(operation) {n const now = Date.now();n const entry = await this._queueStore();n if (entry) {n // Ignore requests older than maxRetentionTime. Call this functionn // recursively until an unexpired request is found.n const maxRetentionTimeInMs = this._maxRetentionTime * 60 * 1000;n if (now - entry.timestamp > maxRetentionTimeInMs) {n return this._removeRequest(operation);n }n return convertEntry(entry);n }n else {n return undefined;n }n }n /**n * Loops through each request in the queue and attempts to re-fetch it.n * If any request fails to re-fetch, it's put back in the same position inn * the queue (which registers a retry for the next sync event).n */n async replayRequests() {n let entry;n while (entry = await this.shiftRequest()) {n try {n await fetch(entry.request.clone());n if (process.env.NODE_ENV !== 'production') {n logger.log(`Request for '${getFriendlyURL(entry.request.url)}'` +n `has been replayed in queue '${this._name}'`);n }n }n catch (error) {n await this.unshiftRequest(entry);n if (process.env.NODE_ENV !== 'production') {n logger.log(`Request for '${getFriendlyURL(entry.request.url)}'` +n `failed to replay, putting it back in queue '${this._name}'`);n }n throw new WorkboxError('queue-replay-failed', { name: this._name });n }n }n if (process.env.NODE_ENV !== 'production') {n logger.log(`All requests in queue '${this.name}' have successfully ` +n `replayed; the queue is now empty!`);n }n }n /**n * Registers a sync event with a tag unique to this instance.n */n async registerSync() {n if ('sync' in self.registration) {n try {n await self.registration.sync.register(`${TAG_PREFIX}:${this._name}`);n }n catch (err) {n // This means the registration failed for some reason, possibly due ton // the user disabling it.n if (process.env.NODE_ENV !== 'production') {n logger.warn(`Unable to register sync event for '${this._name}'.`, err);n }n }n }n }n /**n * In sync-supporting browsers, this adds a listener for the sync event.n * In non-sync-supporting browsers, this will retry the queue on servicen * worker startup.n *n * @privaten */n _addSyncListener() {n if ('sync' in self.registration) {n self.addEventListener('sync', (event) => {n if (event.tag === `${TAG_PREFIX}:${this._name}`) {n if (process.env.NODE_ENV !== 'production') {n logger.log(`Background sync for tag '${event.tag}'` +n `has been received`);n }n const syncComplete = async () => {n this._syncInProgress = true;n let syncError;n try {n await this._onSync({ queue: this });n }n catch (error) {n syncError = error;n // Rethrow the error. Note: the logic in the finally clausen // will run before this gets rethrown.n throw syncError;n }n finally {n // New items may have been added to the queue during the sync,n // so we need to register for a new sync if that's happened…n // Unless there was an error during the sync, in whichn // case the browser will automatically retry later, as longn // as `event.lastChance` is not true.n if (this._requestsAddedDuringSync &&n !(syncError && !event.lastChance)) {n await this.registerSync();n }n this._syncInProgress = false;n this._requestsAddedDuringSync = false;n }n };n event.waitUntil(syncComplete());n }n });n }n else {n if (process.env.NODE_ENV !== 'production') {n logger.log(`Background sync replaying without background sync event`);n }n // If the browser doesn't support background sync, retryn // every time the service worker starts up as a fallback.n this._onSync({ queue: this });n }n }n /**n * Returns the set of queue names. This is primarily used to reset the listn * of queue names in tests.n *n * @return {Set}n *n * @privaten */n static get _queueNames() {n return queueNames;n }n}nexport { Queue };n”,“/*n Copyright 2018 Google LLCnn Use of this source code is governed by an MIT-stylen license that can be found in the LICENSE file or atn opensource.org/licenses/MIT.n*/nimport { Queue } from './Queue.js';nimport './_version.js';n/**n * A class implementing the `fetchDidFail` lifecycle callback. This makes itn * easier to add failed requests to a background sync Queue.n *n * @memberof module:workbox-background-syncn */nclass BackgroundSyncPlugin {n /**n * @param {string} name See the [Queue]{@link module:workbox-background-sync.Queue}n * documentation for parameter details.n * @param {Object} [options] See then * [Queue]{@link module:workbox-background-sync.Queue} documentation forn * parameter details.n */n constructor(name, options) {n /**n * @param {Object} optionsn * @param {Request} options.requestn * @privaten */n this.fetchDidFail = async ({ request }) => {n await this._queue.pushRequest({ request });n };n this._queue = new Queue(name, options);n }n}nexport { BackgroundSyncPlugin 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