Only run the provided delayed operation early

packages/firestore/CHANGELOG.md

@@ -1,4 +1,6 @@
 # Unreleased
+- [fixed] Fixed an issue that could cause Firestore to temporarily go 
+  offline when a Window visibility event occurred.
 - [feature] Added support for calling  `FirebaseFiresore.settings` with 
   `{ ignoreUndefinedProperties: true }`. When set, Firestore ignores 
   undefined properties inside objects rather than rejecting the API call.

packages/firestore/src/local/index_free_query_engine.ts

@@ -196,7 +196,7 @@ export class IndexFreeQueryEngine implements QueryEngine {
     if (getLogLevel() <= LogLevel.DEBUG) {
       logDebug(
         'IndexFreeQueryEngine',
-        'Using full collection scan to execute query: %s',
+        'Using full collection scan to execute query:',
         query.toString()
       );
     }

packages/firestore/src/local/indexeddb_persistence.ts

@@ -23,10 +23,9 @@ import { DocumentKey } from '../model/document_key';
 import { Platform } from '../platform/platform';
 import { JsonProtoSerializer } from '../remote/serializer';
 import { debugAssert, fail } from '../util/assert';
-import { AsyncQueue, TimerId } from '../util/async_queue';
+import { AsyncQueue, DelayedOperation, TimerId } from '../util/async_queue';
 import { Code, FirestoreError } from '../util/error';
 import { logDebug, logError } from '../util/log';
-import { CancelablePromise } from '../util/promise';
 import {
   decodeResourcePath,
   EncodedResourcePath,
@@ -215,7 +214,7 @@ export class IndexedDbPersistence implements Persistence {
   private documentVisibilityHandler: ((e?: Event) => void) | null = null;
 
   /** The client metadata refresh task. */
-  private clientMetadataRefresher: CancelablePromise<void> | null = null;
+  private clientMetadataRefresher: DelayedOperation<void> | null = null;
 
   /** The last time we garbage collected the client metadata object store. */
   private lastGarbageCollectionTime = Number.NEGATIVE_INFINITY;

packages/firestore/src/local/lru_garbage_collector.ts

@@ -18,10 +18,9 @@
 import { ListenSequence } from '../core/listen_sequence';
 import { ListenSequenceNumber, TargetId } from '../core/types';
 import { debugAssert } from '../util/assert';
-import { AsyncQueue, TimerId } from '../util/async_queue';
+import { AsyncQueue, DelayedOperation, TimerId } from '../util/async_queue';
 import { getLogLevel, logDebug, LogLevel } from '../util/log';
 import { primitiveComparator } from '../util/misc';
-import { CancelablePromise } from '../util/promise';
 import { SortedMap } from '../util/sorted_map';
 import { SortedSet } from '../util/sorted_set';
 import { ignoreIfPrimaryLeaseLoss, LocalStore } from './local_store';
@@ -222,7 +221,7 @@ const REGULAR_GC_DELAY_MS = 5 * 60 * 1000;
  */
 export class LruScheduler implements GarbageCollectionScheduler {
   private hasRun: boolean = false;
-  private gcTask: CancelablePromise<void> | null;
+  private gcTask: DelayedOperation<void> | null;
 
   constructor(
     private readonly garbageCollector: LruGarbageCollector,

packages/firestore/src/remote/backoff.ts

@@ -15,9 +15,9 @@
  * limitations under the License.
  */
 
-import { AsyncQueue, TimerId } from '../util/async_queue';
+import { AsyncQueue, DelayedOperation, TimerId } from '../util/async_queue';
 import { logDebug } from '../util/log';
-import { CancelablePromise } from '../util/promise';
+
 const LOG_TAG = 'ExponentialBackoff';
 
 /**
@@ -42,7 +42,7 @@ const DEFAULT_BACKOFF_MAX_DELAY_MS = 60 * 1000;
  */
 export class ExponentialBackoff {
   private currentBaseMs: number = 0;
-  private timerPromise: CancelablePromise<void> | null = null;
+  private timerPromise: DelayedOperation<void> | null = null;
   /** The last backoff attempt, as epoch milliseconds. */
   private lastAttemptTime = Date.now();
 
@@ -149,6 +149,13 @@ export class ExponentialBackoff {
     }
   }
 
+  skipBackoff(): void {
+    if (this.timerPromise !== null) {
+      this.timerPromise.skipDelay();
+      this.timerPromise = null;
+    }
+  }
+
   cancel(): void {
     if (this.timerPromise !== null) {
       this.timerPromise.cancel();

packages/firestore/src/remote/online_state_tracker.ts

@@ -17,10 +17,9 @@
 
 import { OnlineState } from '../core/types';
 import { debugAssert } from '../util/assert';
-import { AsyncQueue, TimerId } from '../util/async_queue';
+import { AsyncQueue, DelayedOperation, TimerId } from '../util/async_queue';
 import { FirestoreError } from '../util/error';
 import { logError, logDebug } from '../util/log';
-import { CancelablePromise } from '../util/promise';
 
 const LOG_TAG = 'OnlineStateTracker';
 
@@ -64,7 +63,7 @@ export class OnlineStateTracker {
    * transition from OnlineState.Unknown to OnlineState.Offline without waiting
    * for the stream to actually fail (MAX_WATCH_STREAM_FAILURES times).
    */
-  private onlineStateTimer: CancelablePromise<void> | null = null;
+  private onlineStateTimer: DelayedOperation<void> | null = null;
 
   /**
    * Whether the client should log a warning message if it fails to connect to

packages/firestore/src/remote/persistent_stream.ts

@@ -22,11 +22,10 @@ import { TargetData } from '../local/target_data';
 import { Mutation, MutationResult } from '../model/mutation';
 import * as api from '../protos/firestore_proto_api';
 import { hardAssert, debugAssert } from '../util/assert';
-import { AsyncQueue, TimerId } from '../util/async_queue';
+import { AsyncQueue, DelayedOperation, TimerId } from '../util/async_queue';
 import { Code, FirestoreError } from '../util/error';
 import { logError, logDebug } from '../util/log';
 
-import { CancelablePromise } from '../util/promise';
 import { isNullOrUndefined } from '../util/types';
 import { ExponentialBackoff } from './backoff';
 import { Connection, Stream } from './connection';
@@ -164,7 +163,7 @@ export abstract class PersistentStream<
    */
   private closeCount = 0;
 
-  private idleTimer: CancelablePromise<void> | null = null;
+  private idleTimer: DelayedOperation<void> | null = null;
   private stream: Stream<SendType, ReceiveType> | null = null;
 
   protected backoff: ExponentialBackoff;

packages/firestore/src/util/async_queue.ts

@@ -18,7 +18,7 @@
 import { debugAssert, fail } from './assert';
 import { Code, FirestoreError } from './error';
 import { logDebug, logError } from './log';
-import { CancelablePromise, Deferred } from './promise';
+import { Deferred } from './promise';
 import { ExponentialBackoff } from '../remote/backoff';
 import { PlatformSupport } from '../platform/platform';
 import { isIndexedDbTransactionError } from '../local/simple_db';
@@ -86,8 +86,12 @@ export const enum TimerId {
  * It is created via DelayedOperation.createAndSchedule().
  *
  * Supports cancellation (via cancel()) and early execution (via skipDelay()).
+ *
+ * Note: We implement `PromiseLike` instead of `Promise`, as the `Promise` type
+ * in newer versions of TypeScript defines `finally`, which is not available in
+ * IE.
  */
-class DelayedOperation<T extends unknown> implements CancelablePromise<T> {
+export class DelayedOperation<T extends unknown> implements PromiseLike<T> {
   // handle for use with clearTimeout(), or null if the operation has been
   // executed or canceled already.
   private timerHandle: TimerHandle | null;
@@ -175,10 +179,7 @@ class DelayedOperation<T extends unknown> implements CancelablePromise<T> {
     }
   }
 
-  // Promise implementation.
-  readonly [Symbol.toStringTag]: 'Promise';
   then = this.deferred.promise.then.bind(this.deferred.promise);
-  catch = this.deferred.promise.catch.bind(this.deferred.promise);
 
   private handleDelayElapsed(): void {
     this.asyncQueue.enqueueAndForget(() => {
@@ -234,10 +235,7 @@ export class AsyncQueue {
   // Visibility handler that triggers an immediate retry of all retryable
   // operations. Meant to speed up recovery when we regain file system access
   // after page comes into foreground.
-  private visibilityHandler = (): void => {
-    // eslint-disable-next-line @typescript-eslint/no-floating-promises
-    this.runDelayedOperationsEarly(TimerId.AsyncQueueRetry);
-  };
+  private visibilityHandler = (): void => this.backoff.skipBackoff();
 
   constructor() {
     const window = PlatformSupport.getPlatform().window;
@@ -379,14 +377,14 @@ export class AsyncQueue {
 
   /**
    * Schedules an operation to be queued on the AsyncQueue once the specified
-   * `delayMs` has elapsed. The returned CancelablePromise can be used to cancel
-   * the operation prior to its running.
+   * `delayMs` has elapsed. The returned DelayedOperation can be used to cancel
+   * or fast-forward the operation prior to its running.
    */
   enqueueAfterDelay<T extends unknown>(
     timerId: TimerId,
     delayMs: number,
     op: () => Promise<T>
-  ): CancelablePromise<T> {
+  ): DelayedOperation<T> {
     this.verifyNotFailed();
 
     debugAssert(
@@ -466,11 +464,10 @@ export class AsyncQueue {
    * For Tests: Runs some or all delayed operations early.
    *
    * @param lastTimerId Delayed operations up to and including this TimerId will
-   *  be drained. Throws if no such operation exists. Pass TimerId.All to run
-   *  all delayed operations.
+   *  be drained. Pass TimerId.All to run all delayed operations.
    * @returns a Promise that resolves once all operations have been run.
    */
-  runDelayedOperationsEarly(lastTimerId: TimerId): Promise<void> {
+  runAllDelayedOperationsUntil(lastTimerId: TimerId): Promise<void> {
     // Note that draining may generate more delayed ops, so we do that first.
     return this.drain().then(() => {
       // Run ops in the same order they'd run if they ran naturally.

packages/firestore/src/util/promise.ts

@@ -23,24 +23,6 @@ export interface Rejecter {
   (reason?: Error): void;
 }
 
-export interface CancelablePromise<T> {
-  // We are not extending Promise, since Node's Promise API require us to
-  // implement 'finally', which is not fully supported on Web.
-  then<TResult1 = T, TResult2 = never>(
-    onfulfilled?:
-      | ((value: T) => TResult1 | PromiseLike<TResult1>)
-      | undefined
-      | null,
-    onrejected?: // eslint-disable-next-line @typescript-eslint/no-explicit-any
-    ((reason: any) => TResult2 | PromiseLike<TResult2>) | undefined | null
-  ): Promise<TResult1 | TResult2>;
-  catch<TResult = never>(
-    onrejected?: // eslint-disable-next-line @typescript-eslint/no-explicit-any
-    ((reason: any) => TResult | PromiseLike<TResult>) | undefined | null
-  ): Promise<T | TResult>;
-  cancel(): void;
-}
-
 export class Deferred<R> {
   promise: Promise<R>;
   // Assigned synchronously in constructor by Promise constructor callback.

packages/firestore/test/integration/api_internal/idle_timeout.test.ts

@@ -27,7 +27,7 @@ apiDescribe('Idle Timeout', (persistence: boolean) => {
       return docRef
         .set({ foo: 'bar' })
         .then(() => {
-          return asyncQueue(db).runDelayedOperationsEarly(
+          return asyncQueue(db).runAllDelayedOperationsUntil(
             TimerId.WriteStreamIdle
           );
         })
@@ -53,7 +53,7 @@ apiDescribe('Idle Timeout', (persistence: boolean) => {
 
       return awaitOnlineSnapshot()
         .then(() => {
-          return asyncQueue(db).runDelayedOperationsEarly(
+          return asyncQueue(db).runAllDelayedOperationsUntil(
             TimerId.ListenStreamIdle
           );
         })

packages/firestore/test/integration/remote/stream.test.ts

@@ -206,7 +206,7 @@ describe('Write Stream', () => {
           expect(queue.containsDelayedOperation(TimerId.WriteStreamIdle)).to.be
             .true;
           return Promise.all([
-            queue.runDelayedOperationsEarly(TimerId.WriteStreamIdle),
+            queue.runAllDelayedOperationsUntil(TimerId.WriteStreamIdle),
             streamListener.awaitCallback('close')
           ]);
         })
@@ -229,7 +229,7 @@ describe('Write Stream', () => {
       writeStream.writeMutations(SINGLE_MUTATION);
       await streamListener.awaitCallback('mutationResult');
 
-      await queue.runDelayedOperationsEarly(TimerId.All);
+      await queue.runAllDelayedOperationsUntil(TimerId.All);
       expect(writeStream.isOpen()).to.be.true;
     });
   });

packages/firestore/test/unit/local/indexeddb_persistence.test.ts

@@ -1185,7 +1185,7 @@ describe('IndexedDb: allowTabSynchronization', () => {
   it('ignores intermittent IndexedDbTransactionError during lease refresh', async () => {
     await withPersistence('clientA', async (db, _, queue) => {
       db.injectFailures = ['updateClientMetadataAndTryBecomePrimary'];
-      await queue.runDelayedOperationsEarly(TimerId.ClientMetadataRefresh);
+      await queue.runAllDelayedOperationsUntil(TimerId.ClientMetadataRefresh);
       await queue.enqueue(() => {
         db.injectFailures = [];
         return db.runTransaction('check success', 'readwrite-primary', () =>

packages/firestore/test/unit/specs/spec_test_runner.ts

@@ -380,7 +380,7 @@ abstract class TestRunner {
           TimerId.ListenStreamConnectionBackoff
         )
       ) {
-        await this.queue.runDelayedOperationsEarly(
+        await this.queue.runAllDelayedOperationsUntil(
           TimerId.ListenStreamConnectionBackoff
         );
       }
@@ -605,7 +605,7 @@ abstract class TestRunner {
     );
     // The watch stream should re-open if we have active listeners.
     if (spec.runBackoffTimer && !this.queryListeners.isEmpty()) {
-      await this.queue.runDelayedOperationsEarly(
+      await this.queue.runAllDelayedOperationsUntil(
         TimerId.ListenStreamConnectionBackoff
       );
       await this.connection.waitForWatchOpen();
@@ -656,7 +656,7 @@ abstract class TestRunner {
     // not, then there won't be a matching item on the queue and
     // runDelayedOperationsEarly() will throw.
     const timerId = timer as TimerId;
-    await this.queue.runDelayedOperationsEarly(timerId);
+    await this.queue.runAllDelayedOperationsUntil(timerId);
   }
 
   private async doDisableNetwork(): Promise<void> {
@@ -706,7 +706,9 @@ abstract class TestRunner {
 
     if (state.primary) {
       await clearCurrentPrimaryLease();
-      await this.queue.runDelayedOperationsEarly(TimerId.ClientMetadataRefresh);
+      await this.queue.runAllDelayedOperationsUntil(
+        TimerId.ClientMetadataRefresh
+      );
     }
 
     return Promise.resolve();

packages/firestore/test/unit/util/async_queue.test.ts

@@ -20,7 +20,7 @@ import * as chaiAsPromised from 'chai-as-promised';
 import { expect, use } from 'chai';
 import { AsyncQueue, TimerId } from '../../../src/util/async_queue';
 import { Code } from '../../../src/util/error';
-import { getLogLevel, setLogLevel, LogLevel } from '../../../src/util/log';
+import { getLogLevel, LogLevel, setLogLevel } from '../../../src/util/log';
 import { Deferred, Rejecter, Resolver } from '../../../src/util/promise';
 import { fail } from '../../../src/util/assert';
 import { IndexedDbTransactionError } from '../../../src/local/simple_db';
@@ -171,7 +171,7 @@ describe('AsyncQueue', () => {
       err => expect(err.code === Code.CANCELLED)
     );
 
-    await queue.runDelayedOperationsEarly(TimerId.All);
+    await queue.runAllDelayedOperationsUntil(TimerId.All);
     expect(completedSteps).to.deep.equal([1]);
   });
 
@@ -187,7 +187,7 @@ describe('AsyncQueue', () => {
     queue.enqueueAfterDelay(timerId2, 10000, () => doStep(3));
     queue.enqueueAndForget(() => doStep(2));
 
-    await queue.runDelayedOperationsEarly(TimerId.All);
+    await queue.runAllDelayedOperationsUntil(TimerId.All);
     expect(completedSteps).to.deep.equal([1, 2, 3, 4]);
   });
 
@@ -205,7 +205,7 @@ describe('AsyncQueue', () => {
     queue.enqueueAfterDelay(timerId3, 15000, () => doStep(4));
     queue.enqueueAndForget(() => doStep(2));
 
-    await queue.runDelayedOperationsEarly(timerId3);
+    await queue.runAllDelayedOperationsUntil(timerId3);
     expect(completedSteps).to.deep.equal([1, 2, 3, 4]);
   });
 
@@ -223,7 +223,7 @@ describe('AsyncQueue', () => {
         );
       }
     });
-    await queue.runDelayedOperationsEarly(TimerId.AsyncQueueRetry);
+    await queue.runAllDelayedOperationsUntil(TimerId.AsyncQueueRetry);
     expect(completedSteps).to.deep.equal([1, 1]);
   });
 
@@ -279,7 +279,7 @@ describe('AsyncQueue', () => {
     expect(completedSteps).to.deep.equal([1]);
 
     // Fast forward all operations
-    await queue.runDelayedOperationsEarly(TimerId.AsyncQueueRetry);
+    await queue.runAllDelayedOperationsUntil(TimerId.AsyncQueueRetry);
     expect(completedSteps).to.deep.equal([1, 1]);
   });