fix: detect spotapi exports at runtime, lazy-import per type

PublicSong doesn't exist in the installed spotapi version. Now discovers
available class names at startup and picks the right one dynamically.
Missing track/album class no longer breaks playlist resolution.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

backend/spotify_resolve.py

@@ -53,19 +53,24 @@ def _parse_images(imgs_obj):
 
 # ─── RESOLVER ────────────────────────────────────────────────────────────────
 
-def resolve(sp_type, sp_id):
+def _spotapi_classes():
-    from spotapi import PublicPlaylist, PublicAlbum, PublicSong
+    import spotapi as _sp
+    available = [x for x in dir(_sp) if not x.startswith('_')]
+    eprint(f'[spotapi] exports: {available}')
+    return _sp, available
 
+def resolve(sp_type, sp_id):
+    sp_mod, available = _spotapi_classes()
     url = f'https://open.spotify.com/{sp_type}/{sp_id}'
 
     if sp_type == 'track':
-        song = PublicSong(url)
+        cls_name = next((n for n in ('PublicSong', 'Song', 'PublicTrack', 'Track') if n in available), None)
+        if not cls_name:
+            raise Exception(f'spotapi has no track class (available: {available})')
+        song = getattr(sp_mod, cls_name)(url)
         raw  = song.get_song_info()
-        eprint(f'[spotapi] track response keys: {list(raw.keys()) if isinstance(raw, dict) else type(raw)}')
+        eprint(f'[spotapi] track raw keys: {list(raw.keys()) if isinstance(raw, dict) else type(raw)}')
-        tr = _parse_track(raw)
+        tr = _parse_track(raw) or {
-        if not tr:
-            # Fallback: raw might already be a flat dict
-            tr = {
             'trackName':         raw.get('name', ''),
             'artistName':        raw.get('artist', ''),
             'collectionName':    raw.get('album', ''),
@@ -75,40 +80,42 @@ def resolve(sp_type, sp_id):
             'trackExplicitness': 'notExplicit',
             'durationMs':        raw.get('duration_ms'),
         }
-        name   = tr.get('trackName', '')
+        return {'type': 'track', 'name': tr.get('trackName', ''),
-        artist = tr.get('artistName', '')
+                'artist': tr.get('artistName', ''), 'artworkUrl': tr.get('artworkUrl100', ''),
-        art    = tr.get('artworkUrl100', '')
+                'tracks': [tr]}
-        return {'type': 'track', 'name': name, 'artist': artist, 'artworkUrl': art, 'tracks': [tr]}
 
     if sp_type == 'album':
-        alb      = PublicAlbum(url)
+        cls_name = next((n for n in ('PublicAlbum', 'Album') if n in available), None)
+        if not cls_name:
+            raise Exception(f'spotapi has no album class (available: {available})')
+        alb      = getattr(sp_mod, cls_name)(url)
         alb_info = alb.get_album_info()
-        eprint(f'[spotapi] album response type: {type(alb_info)}, keys: {list(alb_info.keys()) if isinstance(alb_info, dict) else "?"}')
+        eprint(f'[spotapi] album raw type={type(alb_info).__name__} keys={list(alb_info.keys()) if isinstance(alb_info, dict) else "?"}')
-
-        # alb_info may be a dict with metadata + items, or just items
         meta       = alb_info if isinstance(alb_info, dict) else {}
         name       = meta.get('name', '')
         artist     = meta.get('artist', '') or meta.get('artists', '')
         art        = meta.get('image', '') or meta.get('cover', '')
-
         raw_tracks = meta.get('tracks') or meta.get('items') or (alb_info if isinstance(alb_info, list) else [])
         tracks     = [t for t in (_parse_track(i) for i in raw_tracks) if t]
         eprint(f'[spotapi] album ok — {len(tracks)} tracks')
         return {'type': 'album', 'name': name, 'artist': artist, 'artworkUrl': art, 'tracks': tracks}
 
     # playlist
-    pl = PublicPlaylist(url)
+    cls_name = next((n for n in ('PublicPlaylist', 'Playlist') if n in available), None)
-    pl_meta = pl.get_playlist_info(limit=1)  # first call often returns metadata too
+    if not cls_name:
-    eprint(f'[spotapi] playlist meta type: {type(pl_meta)}')
+        raise Exception(f'spotapi has no playlist class (available: {available})')
+    pl      = getattr(sp_mod, cls_name)(url)
+    pl_meta = pl.get_playlist_info(limit=1)
+    eprint(f'[spotapi] playlist first-page type={type(pl_meta).__name__}')
 
-    tracks, skipped = [], 0
+    tracks, skipped, offset = [], 0, 0
-    offset = 0
     while True:
         page  = pl.get_playlist_info(limit=100, offset=offset)
         items = page if isinstance(page, list) else (page.get('items') or page.get('tracks') or [])
         if not items: break
         for item in items:
-            if (item.get('itemV2') or item.get('track', {}).get('data', {})).get('__typename') == 'LocalTrackResponseWrapper':
+            typename = (item.get('itemV2') or {}).get('data', {}).get('__typename', '')
+            if typename == 'LocalTrackResponseWrapper':
                 skipped += 1; continue
             tr = _parse_track(item)
             if tr: tracks.append(tr)
@@ -116,10 +123,7 @@ def resolve(sp_type, sp_id):
         offset += len(items)
         time.sleep(0.3)
 
-    # Extract playlist name/art from first page if available
+    name = owner = art = ''
-    name  = ''
-    owner = ''
-    art   = ''
     if isinstance(pl_meta, dict):
         name  = pl_meta.get('name', '')
         owner = pl_meta.get('owner', '') or pl_meta.get('owner_name', '')