Add getMusicDirectory endpoint for folder-based browsing in Amperfy

src/routes/subsonic.js

@@ -98,6 +98,110 @@ router.get('/getMusicFolders.view', authenticateSubsonic, async (req, res) => {
 `);
 });
 
+// Get music directory (for browsing by folder structure)
+router.get('/getMusicDirectory.view', authenticateSubsonic, async (req, res) => {
+  try {
+    const { id } = req.query;
+    
+    // Root folder - return all artists
+    if (id === '1') {
+      const artists = await all(`
+        SELECT DISTINCT artist
+        FROM tracks
+        ORDER BY artist
+      `);
+      
+      let dirXml = '<directory id="1" name="Music Library">\n';
+      
+      artists.forEach(artist => {
+        const artistId = crypto.createHash('md5').update(`artist-${artist.artist}`).digest('hex');
+        dirXml += `  <child id="${artistId}" parent="1" title="${escapeXml(artist.artist)}" isDir="true"/>\n`;
+      });
+      
+      dirXml += '</directory>';
+      return sendSubsonicResponse(res, dirXml);
+    }
+    
+    // Artist folder - return albums for this artist
+    const artists = await all(`SELECT DISTINCT artist FROM tracks`);
+    let targetArtist = null;
+    
+    for (const artist of artists) {
+      const testId = crypto.createHash('md5').update(`artist-${artist.artist}`).digest('hex');
+      if (testId === id) {
+        targetArtist = artist.artist;
+        break;
+      }
+    }
+    
+    if (targetArtist) {
+      const albums = await all(`
+        SELECT DISTINCT album, album_artist, year,
+               (SELECT artwork_path FROM tracks t2 WHERE t2.album = tracks.album AND t2.artist = ? LIMIT 1) as artwork_path,
+               COUNT(*) as track_count
+        FROM tracks
+        WHERE artist = ?
+        GROUP BY album, album_artist
+        ORDER BY year DESC, album
+      `, [targetArtist, targetArtist]);
+      
+      let dirXml = `<directory id="${id}" parent="1" name="${escapeXml(targetArtist)}">\n`;
+      
+      albums.forEach(album => {
+        const albumId = crypto.createHash('md5').update(`album-${album.album}-${album.album_artist}`).digest('hex');
+        const coverArt = album.artwork_path ? albumId : '';
+        dirXml += `  <child id="${albumId}" parent="${id}" title="${escapeXml(album.album)}" `;
+        dirXml += `album="${escapeXml(album.album)}" artist="${escapeXml(targetArtist)}" `;
+        dirXml += `coverArt="${coverArt}" isDir="true"/>\n`;
+      });
+      
+      dirXml += '</directory>';
+      return sendSubsonicResponse(res, dirXml);
+    }
+    
+    // Album folder - return tracks
+    const allAlbums = await all(`SELECT DISTINCT album, album_artist FROM tracks`);
+    let targetAlbum = null;
+    let targetAlbumArtist = null;
+    
+    for (const album of allAlbums) {
+      const testId = crypto.createHash('md5').update(`album-${album.album}-${album.album_artist}`).digest('hex');
+      if (testId === id) {
+        targetAlbum = album.album;
+        targetAlbumArtist = album.album_artist;
+        break;
+      }
+    }
+    
+    if (targetAlbum) {
+      const tracks = await all(`
+        SELECT * FROM tracks
+        WHERE album = ? AND album_artist = ?
+        ORDER BY disc_number, track_number, title
+      `, [targetAlbum, targetAlbumArtist]);
+      
+      if (tracks.length === 0) {
+        return sendSubsonicError(res, 70, 'Album not found');
+      }
+      
+      const firstTrack = tracks[0];
+      let dirXml = `<directory id="${id}" name="${escapeXml(targetAlbum)}">\n`;
+      
+      tracks.forEach(track => {
+        dirXml += buildSongXml(track, req);
+      });
+      
+      dirXml += '</directory>';
+      return sendSubsonicResponse(res, dirXml);
+    }
+    
+    sendSubsonicError(res, 70, 'Directory not found');
+  } catch (error) {
+    console.error('Error in getMusicDirectory:', error);
+    sendSubsonicError(res, 0, error.message);
+  }
+});
+
 // Get indexes (artists)
 router.get('/getIndexes.view', authenticateSubsonic, async (req, res) => {
   try {