Lyrics Improvements

- Make the settings text actually consistent with behavior
- Add metadata (artist/track name) for fetched tracks
- Add ability to remove incorrectly fetched lyric
- Add lyric fetch cache; save the last 10 fetches
- Add ability to change offset in full screen, add more comments

src/main/features/core/lyrics/index.ts

@@ -1,4 +1,4 @@
-import { QueueSong } from '/@/renderer/api/types';
+import { InternetProviderLyricResponse, QueueSong } from '/@/renderer/api/types';
 import { query as queryGenius } from './genius';
 import { query as queryNetease } from './netease';
 import { LyricSource } from '../../../../renderer/types';
@@ -6,19 +6,52 @@ import { ipcMain } from 'electron';
 import { getMainWindow } from '../../../main';
 import { store } from '../settings/index';
 
-type SongFetcher = (song: QueueSong) => Promise<string | null>;
+type SongFetcher = (song: QueueSong) => Promise<InternetProviderLyricResponse | null>;
+
+type CachedLyrics = Record<LyricSource, InternetProviderLyricResponse>;
 
 const FETCHERS: Record<LyricSource, SongFetcher> = {
   [LyricSource.GENIUS]: queryGenius,
   [LyricSource.NETEASE]: queryNetease,
 };
 
+const MAX_CACHED_ITEMS = 10;
+
+const lyricCache = new Map<string, CachedLyrics>();
+
 ipcMain.on('lyric-fetch', async (_event, song: QueueSong) => {
   const sources = store.get('lyrics', []) as LyricSource[];
 
+  const cached = lyricCache.get(song.id);
+
+  if (cached) {
+    for (const source of sources) {
+      const data = cached[source];
+
+      if (data) {
+        getMainWindow()?.webContents.send('lyric-get', song.name, source, data);
+        return;
+      }
+    }
+  }
+
   for (const source of sources) {
     const lyric = await FETCHERS[source](song);
     if (lyric) {
+      const newResult = cached
+        ? {
+            ...cached,
+            [source]: lyric,
+          }
+        : ({ [source]: lyric } as CachedLyrics);
+
+      if (lyricCache.size === MAX_CACHED_ITEMS && cached === undefined) {
+        const toRemove = lyricCache.keys().next().value;
+        lyricCache.delete(toRemove);
+      }
+
+      lyricCache.set(song.id, newResult);
+
       getMainWindow()?.webContents.send('lyric-get', song.name, source, lyric);
       break;
     }