feat: Better Scrobbler Plugin (#1640)

Co-authored-by: JellyBrick <shlee1503@naver.com>

src/plugins/scrobbler/main.ts

@@ -0,0 +1,77 @@
+import registerCallback, { type SongInfo } from '@/providers/song-info';
+import { createBackend } from '@/utils';
+
+import { ScrobblerPluginConfig } from './index';
+import { LastFmScrobbler } from './services/lastfm';
+import { ListenbrainzScrobbler } from './services/listenbrainz';
+import { ScrobblerBase } from './services/base';
+
+export type SetConfType = (
+  conf: Partial<Omit<ScrobblerPluginConfig, 'enabled'>>,
+) => void | Promise<void>;
+
+export const backend = createBackend<{
+  config?: ScrobblerPluginConfig;
+  enabledScrobblers: Map<string, ScrobblerBase>;
+  toggleScrobblers(config: ScrobblerPluginConfig): void;
+}, ScrobblerPluginConfig>({
+  enabledScrobblers: new Map(),
+
+  toggleScrobblers(config: ScrobblerPluginConfig) {
+    if (config.scrobblers.lastfm && config.scrobblers.lastfm.enabled) {
+      this.enabledScrobblers.set('lastfm', new LastFmScrobbler());
+    } else {
+      this.enabledScrobblers.delete('lastfm');
+    }
+
+    if (config.scrobblers.listenbrainz && config.scrobblers.listenbrainz.enabled) {
+      this.enabledScrobblers.set('listenbrainz', new ListenbrainzScrobbler());
+    } else {
+      this.enabledScrobblers.delete('listenbrainz');
+    }
+  },
+
+  async start({
+    getConfig,
+    setConfig,
+  }) {
+    const config = this.config = await getConfig();
+    // This will store the timeout that will trigger addScrobble
+    let scrobbleTimer: NodeJS.Timeout | undefined;
+
+    this.toggleScrobblers(config);
+    for (const [, scrobbler] of this.enabledScrobblers) {
+      if (!scrobbler.isSessionCreated(config)) {
+        await scrobbler.createSession(config, setConfig);
+      }
+    }
+
+    registerCallback((songInfo: SongInfo) => {
+      // Set remove the old scrobble timer
+      clearTimeout(scrobbleTimer);
+      if (!songInfo.isPaused) {
+        const configNonnull = this.config!;
+        // Scrobble when the song is halfway through, or has passed the 4-minute mark
+        const scrobbleTime = Math.min(Math.ceil(songInfo.songDuration / 2), 4 * 60);
+        if (scrobbleTime > (songInfo.elapsedSeconds ?? 0)) {
+          // Scrobble still needs to happen
+          const timeToWait = (scrobbleTime - (songInfo.elapsedSeconds ?? 0)) * 1000;
+          scrobbleTimer = setTimeout((info, config) => {
+            this.enabledScrobblers.forEach((scrobbler) => scrobbler.addScrobble(info, config, setConfig));
+          }, timeToWait, songInfo, configNonnull);
+        }
+
+        this.enabledScrobblers.forEach((scrobbler) => scrobbler.setNowPlaying(songInfo, configNonnull, setConfig));
+      }
+    });
+  },
+
+  onConfigChange(newConfig: ScrobblerPluginConfig) {
+    this.enabledScrobblers.clear();
+
+    this.config = newConfig;
+
+    this.toggleScrobblers(this.config);
+  }
+});
+