feat(voice): retry unrecoverable disconnects

README.md

@@ -114,6 +114,7 @@ type AudioManagerOptions = {
     };
     source?: { type: 'url'; url: string } | { type: 'file'; path: string };
     renewIntervalMs?: number | false;
+    reconnectAttempts?: number;
     connectTimeoutMs?: number;
     onError?: (error: Error) => void;
     volume?: {
@@ -124,16 +125,18 @@ type AudioManagerOptions = {
 ```
 
 `connectTimeoutMs` and numeric `renewIntervalMs` values must be whole milliseconds from `1` through `2_147_483_647`.
+`reconnectAttempts` must be a non-negative safe integer. URL sources must use `http:` or `https:`.
 `volume.initialPercent` must be a finite number from `0` through `100` and requires `volume.enabled: true`.
 
 ### Defaults
 
-| Option             | Default    |
-| ------------------ | ---------- |
-| `ffmpeg.mode`      | `'native'` |
-| `connectTimeoutMs` | `20_000`   |
-| `renewIntervalMs`  | `false`    |
-| `volume.enabled`   | `false`    |
+| Option              | Default    |
+| ------------------- | ---------- |
+| `ffmpeg.mode`       | `'native'` |
+| `connectTimeoutMs`  | `20_000`   |
+| `renewIntervalMs`   | `false`    |
+| `reconnectAttempts` | `0`        |
+| `volume.enabled`    | `false`    |
 
 ### Methods
 
@@ -188,6 +191,9 @@ Connection renewal is disabled by default because `@discordjs/voice` handles rec
 `renewIntervalMs` only when an application has a measured need for periodic restarts. `stop()` and `dispose()` always
 clear the renewal timer.
 
+After an unrecoverable disconnect, playback stops by default. Set `reconnectAttempts` to retry joining the configured
+voice channel and restarting the current source.
+
 ## Errors
 
 The package exports these error classes:

src/audio-manager.ts

@@ -48,6 +48,7 @@ export default class AudioManager implements Disposable {
     private connectAttempt: AbortController | undefined;
     private renewTimer: NodeJS.Timeout | undefined;
     private playbackState: PlaybackState = 'idle';
+    private reconnectGeneration = 0;
     private connectionOptions: VoiceConnectionOptions | undefined;
     private audioSource: AudioSource | undefined;
     private readonly options: Required<Pick<AudioManagerOptions, 'connectTimeoutMs'>> &
@@ -61,6 +62,13 @@ export default class AudioManager implements Disposable {
             assertValidTimerDelay(options.renewIntervalMs, 'renewIntervalMs');
         }
 
+        if (
+            options.reconnectAttempts !== undefined &&
+            (!Number.isSafeInteger(options.reconnectAttempts) || options.reconnectAttempts < 0)
+        ) {
+            throw new AudioManagerConfigError('reconnectAttempts must be a non-negative safe integer.');
+        }
+
         if (options.volume?.initialPercent !== undefined) {
             if (options.volume.enabled !== true) {
                 throw new AudioManagerConfigError('volume.initialPercent requires volume.enabled to be true.');
@@ -254,6 +262,7 @@ export default class AudioManager implements Disposable {
             return;
         }
 
+        this.reconnectGeneration += 1;
         this.cancelConnectAttempt();
         this.clearRenewTimer();
         this.stopCurrentPlayback();
@@ -285,6 +294,7 @@ export default class AudioManager implements Disposable {
             return;
         }
 
+        this.reconnectGeneration += 1;
         this.cancelConnectAttempt();
         this.clearRenewTimer();
         this.stopCurrentPlayback();
@@ -366,6 +376,9 @@ export default class AudioManager implements Disposable {
     }
 
     private async handleDisconnectedConnection(connection: VoiceConnection): Promise<void> {
+        const shouldReconnect = this.resource !== undefined && (this.options.reconnectAttempts ?? 0) > 0;
+        const reconnectGeneration = this.reconnectGeneration;
+
         try {
             await Promise.race([
                 entersState(connection, VoiceConnectionStatus.Signalling, DISCONNECT_RECOVERY_TIMEOUT_MS),
@@ -376,6 +389,22 @@ export default class AudioManager implements Disposable {
                 return;
             }
 
+            if (shouldReconnect) {
+                this.clearRenewTimer();
+                for (let attempt = 0; attempt < (this.options.reconnectAttempts ?? 0); attempt += 1) {
+                    try {
+                        await this.start();
+                        return;
+                    } catch (reconnectError) {
+                        error = reconnectError;
+                    }
+
+                    if (this.reconnectGeneration !== reconnectGeneration || this.playbackState === 'disposed') {
+                        return;
+                    }
+                }
+            }
+
             this.clearRenewTimer();
             this.stopCurrentPlayback();
             this.audioPlayer.stop(true);

src/types.ts

@@ -150,6 +150,12 @@ export type AudioManagerOptions = {
      */
     renewIntervalMs?: number | false;
 
+    /**
+     * Number of full reconnect and playback restart attempts after an unrecoverable disconnect.
+     * Disabled by default. Must be a non-negative safe integer.
+     */
+    reconnectAttempts?: number;
+
     /**
      * Maximum milliseconds to wait for the Discord voice connection to become ready.
      * Must be an integer from `1` through `2_147_483_647`.