Revert "feat(service-worker): notify clients about version failures (#62718)"

This reverts commit 6d011687ec.

issue #63500 reproduces at head on the main branch in the dev app.
Reverting this change along resolves it.

fixes https://github.com/angular/angular/issues/63500

goldens/public-api/service-worker/index.api.md

@@ -110,7 +110,7 @@ export interface VersionDetectedEvent {
 }
 
 // @public
-export type VersionEvent = VersionDetectedEvent | VersionInstallationFailedEvent | VersionReadyEvent | VersionFailedEvent | NoNewVersionDetectedEvent;
+export type VersionEvent = VersionDetectedEvent | VersionInstallationFailedEvent | VersionReadyEvent | NoNewVersionDetectedEvent;
 
 // @public
 export interface VersionInstallationFailedEvent {

packages/service-worker/src/low_level.ts

@@ -70,23 +70,6 @@ export interface VersionReadyEvent {
   latestVersion: {hash: string; appData?: object};
 }
 
-/**
- * An event emitted when a specific version of the app has encountered a critical failure
- * that prevents it from functioning correctly.
- *
- * When a version fails, the service worker will notify all clients currently using that version
- * and may degrade to serving only existing clients if the failed version was the latest one.
- *
- * @see {@link /ecosystem/service-workers/communications Service Worker Communication Guide}
- *
- * @publicApi
- */
-export interface VersionFailedEvent {
-  type: 'VERSION_FAILED';
-  version: {hash: string; appData?: object};
-  error: string;
-}
-
 /**
  * A union of all event types that can be emitted by
  * {@link SwUpdate#versionUpdates}.
@@ -97,7 +80,6 @@ export type VersionEvent =
   | VersionDetectedEvent
   | VersionInstallationFailedEvent
   | VersionReadyEvent
-  | VersionFailedEvent
   | NoNewVersionDetectedEvent;
 
 /**

packages/service-worker/src/update.ts

@@ -69,7 +69,6 @@ export class SwUpdate {
       'VERSION_INSTALLATION_FAILED',
       'VERSION_READY',
       'NO_NEW_VERSION_DETECTED',
-      'VERSION_FAILED',
     ]);
     this.unrecoverable = this.sw.eventsOfType<UnrecoverableStateEvent>('UNRECOVERABLE_STATE');
   }

packages/service-worker/test/comm_spec.ts

@@ -13,7 +13,6 @@ import {
   NoNewVersionDetectedEvent,
   VersionDetectedEvent,
   VersionEvent,
-  VersionFailedEvent,
   VersionReadyEvent,
 } from '../src/low_level';
 import {ngswCommChannelFactory, SwRegistrationOptions} from '../src/provider';
@@ -510,25 +509,6 @@ describe('ServiceWorker library', () => {
         },
       });
     });
-    it('processes version failed events with cache corruption error', (done) => {
-      update.versionUpdates.subscribe((event) => {
-        expect(event.type).toEqual('VERSION_FAILED');
-        expect((event as VersionFailedEvent).version).toEqual({
-          hash: 'B',
-          appData: {name: 'test-app'},
-        });
-        expect((event as VersionFailedEvent).error).toContain('Cache corruption detected');
-        done();
-      });
-      mock.sendMessage({
-        type: 'VERSION_FAILED',
-        version: {
-          hash: 'B',
-          appData: {name: 'test-app'},
-        },
-        error: 'Cache corruption detected during resource fetch',
-      });
-    });
     it('activates updates when requested', async () => {
       mock.messages.subscribe((msg: {action: string; nonce: number}) => {
         expect(msg.action).toEqual('ACTIVATE_UPDATE');

packages/service-worker/worker/src/driver.ts

@@ -992,8 +992,7 @@ export class Driver implements Debuggable, UpdateSource {
     // Therefore, we keep clients on their current version (even if broken) and ensure that no new
     // clients will be assigned to it.
 
-    // Notify clients that are using this broken version about the failure.
-    await this.notifyClientsAboutVersionFailure(brokenHash, err);
+    // TODO: notify affected apps.
 
     // The action taken depends on whether the broken manifest is the active (latest) or not.
     // - If the broken version is not the latest, no further action is necessary, since new clients
@@ -1335,29 +1334,6 @@ export class Driver implements Debuggable, UpdateSource {
     );
   }
 
-  async notifyClientsAboutVersionFailure(brokenHash: string, error: Error): Promise<void> {
-    await this.initialized;
-
-    // Find all clients using the broken version
-    const affectedClients = Array.from(this.clientVersionMap.entries())
-      .filter(([clientId, hash]) => hash === brokenHash)
-      .map(([clientId]) => clientId);
-
-    await Promise.all(
-      affectedClients.map(async (clientId) => {
-        const client = await this.scope.clients.get(clientId);
-        if (client) {
-          const brokenVersion = this.versions.get(brokenHash);
-          client.postMessage({
-            type: 'VERSION_FAILED',
-            version: this.mergeHashWithAppData(brokenVersion!.manifest, brokenHash),
-            error: errorToString(error),
-          });
-        }
-      }),
-    );
-  }
-
   async broadcast(msg: Object): Promise<void> {
     const clients = await this.scope.clients.matchAll();
     clients.forEach((client) => {

packages/service-worker/worker/test/happy_spec.ts

@@ -2594,7 +2594,6 @@ import {envIsSupported} from '../testing/utils';
           expect(await makeRequest(scope, '/foo.hash.js', 'client-2')).toBeNull();
           expect(mockClient2.messages).toEqual([
             jasmine.objectContaining({type: 'UNRECOVERABLE_STATE'}),
-            jasmine.objectContaining({type: 'VERSION_FAILED'}),
           ]);
 
           // This should also enter the `SW` into degraded mode, because the broken version was the