add function to validate albums

+ extract colors in watchdogg
+ rename color db files

app/lib/albumslib.py

@@ -1,3 +1,22 @@
 """
 Contains methods relating to albums.
-"""
+"""
+
+from tqdm import tqdm
+from app.store.albums import AlbumStore
+from app.store.tracks import TrackStore
+
+
+def validate_albums():
+    """
+    Removes albums that have no tracks.
+
+    Probably albums that were added from incompletely written files.
+    """
+
+    album_hashes = {t.albumhash for t in TrackStore.tracks}
+    albums = AlbumStore.albums
+
+    for album in tqdm(albums, desc="Validating albums"):
+        if album.albumhash not in album_hashes:
+            AlbumStore.remove_album(album)