@angular/service-worker
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Angular - service worker tooling!
106 lines • 13.9 kB
JavaScript
/**
* @license
* Copyright Google LLC All Rights Reserved.
*
* Use of this source code is governed by an MIT-style license that can be
* found in the LICENSE file at https://angular.io/license
*/
import { Injectable } from '@angular/core';
import { NEVER } from 'rxjs';
import { filter, map } from 'rxjs/operators';
import { ERR_SW_NOT_SUPPORTED, NgswCommChannel } from './low_level';
import * as i0 from "@angular/core";
import * as i1 from "./low_level";
/**
* Subscribe to update notifications from the Service Worker, trigger update
* checks, and forcibly activate updates.
*
* @see {@link guide/service-worker-communications Service worker communication guide}
*
* @publicApi
*/
export class SwUpdate {
/**
* True if the Service Worker is enabled (supported by the browser and enabled via
* `ServiceWorkerModule`).
*/
get isEnabled() {
return this.sw.isEnabled;
}
constructor(sw) {
this.sw = sw;
if (!sw.isEnabled) {
this.versionUpdates = NEVER;
this.available = NEVER;
this.activated = NEVER;
this.unrecoverable = NEVER;
return;
}
this.versionUpdates = this.sw.eventsOfType([
'VERSION_DETECTED',
'VERSION_INSTALLATION_FAILED',
'VERSION_READY',
'NO_NEW_VERSION_DETECTED',
]);
this.available = this.versionUpdates.pipe(filter((evt) => evt.type === 'VERSION_READY'), map(evt => ({
type: 'UPDATE_AVAILABLE',
current: evt.currentVersion,
available: evt.latestVersion,
})));
this.activated = this.sw.eventsOfType('UPDATE_ACTIVATED');
this.unrecoverable = this.sw.eventsOfType('UNRECOVERABLE_STATE');
}
/**
* Checks for an update and waits until the new version is downloaded from the server and ready
* for activation.
*
* @returns a promise that
* - resolves to `true` if a new version was found and is ready to be activated.
* - resolves to `false` if no new version was found
* - rejects if any error occurs
*/
checkForUpdate() {
if (!this.sw.isEnabled) {
return Promise.reject(new Error(ERR_SW_NOT_SUPPORTED));
}
const nonce = this.sw.generateNonce();
return this.sw.postMessageWithOperation('CHECK_FOR_UPDATES', { nonce }, nonce);
}
/**
* Updates the current client (i.e. browser tab) to the latest version that is ready for
* activation.
*
* In most cases, you should not use this method and instead should update a client by reloading
* the page.
*
* <div class="alert is-important">
*
* Updating a client without reloading can easily result in a broken application due to a version
* mismatch between the [application shell](guide/glossary#app-shell) and other page resources,
* such as [lazy-loaded chunks](guide/glossary#lazy-loading), whose filenames may change between
* versions.
*
* Only use this method, if you are certain it is safe for your specific use case.
*
* </div>
*
* @returns a promise that
* - resolves to `true` if an update was activated successfully
* - resolves to `false` if no update was available (for example, the client was already on the
* latest version).
* - rejects if any error occurs
*/
activateUpdate() {
if (!this.sw.isEnabled) {
return Promise.reject(new Error(ERR_SW_NOT_SUPPORTED));
}
const nonce = this.sw.generateNonce();
return this.sw.postMessageWithOperation('ACTIVATE_UPDATE', { nonce }, nonce);
}
static { this.ɵfac = i0.ɵɵngDeclareFactory({ minVersion: "12.0.0", version: "16.2.6", ngImport: i0, type: SwUpdate, deps: [{ token: i1.NgswCommChannel }], target: i0.ɵɵFactoryTarget.Injectable }); }
static { this.ɵprov = i0.ɵɵngDeclareInjectable({ minVersion: "12.0.0", version: "16.2.6", ngImport: i0, type: SwUpdate }); }
}
i0.ɵɵngDeclareClassMetadata({ minVersion: "12.0.0", version: "16.2.6", ngImport: i0, type: SwUpdate, decorators: [{
type: Injectable
}], ctorParameters: function () { return [{ type: i1.NgswCommChannel }]; } });
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* @license\n * Copyright Google LLC All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {Injectable} from '@angular/core';\nimport {NEVER, Observable} from 'rxjs';\nimport {filter, map} from 'rxjs/operators';\n\nimport {ERR_SW_NOT_SUPPORTED, NgswCommChannel, UnrecoverableStateEvent, UpdateActivatedEvent, UpdateAvailableEvent, VersionEvent, VersionReadyEvent} from './low_level';\n\n\n\n/**\n * Subscribe to update notifications from the Service Worker, trigger update\n * checks, and forcibly activate updates.\n *\n * @see {@link guide/service-worker-communications Service worker communication guide}\n *\n * @publicApi\n */\n@Injectable()\nexport class SwUpdate {\n  /**\n   * Emits a `VersionDetectedEvent` event whenever a new version is detected on the server.\n   *\n   * Emits a `VersionInstallationFailedEvent` event whenever checking for or downloading a new\n   * version fails.\n   *\n   * Emits a `VersionReadyEvent` event whenever a new version has been downloaded and is ready for\n   * activation.\n   */\n  readonly versionUpdates: Observable<VersionEvent>;\n\n  /**\n   * Emits an `UpdateAvailableEvent` event whenever a new app version is available.\n   *\n   * @deprecated Use {@link versionUpdates} instead.\n   *\n   * The behavior of `available` can be replicated by using `versionUpdates` by filtering for the\n   * `VersionReadyEvent`:\n   *\n   * {@example service-worker-getting-started/src/app/prompt-update.service.ts\n   * region='sw-replicate-available'}\n   */\n  readonly available: Observable<UpdateAvailableEvent>;\n\n  /**\n   * Emits an `UpdateActivatedEvent` event whenever the app has been updated to a new version.\n   *\n   * @deprecated Use the return value of {@link SwUpdate#activateUpdate} instead.\n   *\n   */\n  readonly activated: Observable<UpdateActivatedEvent>;\n\n  /**\n   * Emits an `UnrecoverableStateEvent` event whenever the version of the app used by the service\n   * worker to serve this client is in a broken state that cannot be recovered from without a full\n   * page reload.\n   */\n  readonly unrecoverable: Observable<UnrecoverableStateEvent>;\n\n  /**\n   * True if the Service Worker is enabled (supported by the browser and enabled via\n   * `ServiceWorkerModule`).\n   */\n  get isEnabled(): boolean {\n    return this.sw.isEnabled;\n  }\n\n  constructor(private sw: NgswCommChannel) {\n    if (!sw.isEnabled) {\n      this.versionUpdates = NEVER;\n      this.available = NEVER;\n      this.activated = NEVER;\n      this.unrecoverable = NEVER;\n      return;\n    }\n    this.versionUpdates = this.sw.eventsOfType<VersionEvent>([\n      'VERSION_DETECTED',\n      'VERSION_INSTALLATION_FAILED',\n      'VERSION_READY',\n      'NO_NEW_VERSION_DETECTED',\n    ]);\n    this.available = this.versionUpdates.pipe(\n        filter((evt: VersionEvent): evt is VersionReadyEvent => evt.type === 'VERSION_READY'),\n        map(evt => ({\n              type: 'UPDATE_AVAILABLE',\n              current: evt.currentVersion,\n              available: evt.latestVersion,\n            })));\n    this.activated = this.sw.eventsOfType<UpdateActivatedEvent>('UPDATE_ACTIVATED');\n    this.unrecoverable = this.sw.eventsOfType<UnrecoverableStateEvent>('UNRECOVERABLE_STATE');\n  }\n\n  /**\n   * Checks for an update and waits until the new version is downloaded from the server and ready\n   * for activation.\n   *\n   * @returns a promise that\n   * - resolves to `true` if a new version was found and is ready to be activated.\n   * - resolves to `false` if no new version was found\n   * - rejects if any error occurs\n   */\n  checkForUpdate(): Promise<boolean> {\n    if (!this.sw.isEnabled) {\n      return Promise.reject(new Error(ERR_SW_NOT_SUPPORTED));\n    }\n    const nonce = this.sw.generateNonce();\n    return this.sw.postMessageWithOperation('CHECK_FOR_UPDATES', {nonce}, nonce);\n  }\n\n  /**\n   * Updates the current client (i.e. browser tab) to the latest version that is ready for\n   * activation.\n   *\n   * In most cases, you should not use this method and instead should update a client by reloading\n   * the page.\n   *\n   * <div class=\"alert is-important\">\n   *\n   * Updating a client without reloading can easily result in a broken application due to a version\n   * mismatch between the [application shell](guide/glossary#app-shell) and other page resources,\n   * such as [lazy-loaded chunks](guide/glossary#lazy-loading), whose filenames may change between\n   * versions.\n   *\n   * Only use this method, if you are certain it is safe for your specific use case.\n   *\n   * </div>\n   *\n   * @returns a promise that\n   *  - resolves to `true` if an update was activated successfully\n   *  - resolves to `false` if no update was available (for example, the client was already on the\n   *    latest version).\n   *  - rejects if any error occurs\n   */\n  activateUpdate(): Promise<boolean> {\n    if (!this.sw.isEnabled) {\n      return Promise.reject(new Error(ERR_SW_NOT_SUPPORTED));\n    }\n    const nonce = this.sw.generateNonce();\n    return this.sw.postMessageWithOperation('ACTIVATE_UPDATE', {nonce}, nonce);\n  }\n}\n"]}