Fix results not shown when no preview_url

bot/handlers/inline_default/on_inline_default.py

@@ -19,7 +19,7 @@ async def default_inline_query(inline_query: InlineQuery, bot: Bot):
                 title=audio.name,
                 description=audio.all_artists,
                 thumb_url=audio.thumbnail,
-                document_url=audio.preview_url,
+                document_url=audio.preview_url or audio.thumbnail,
                 mime_type='application/zip',
                 reply_markup=InlineKeyboardMarkup(
                     inline_keyboard=[

bot/modules/spotify/song.py

@@ -7,7 +7,7 @@ class SongItem:
     name: str
     id: str
     artists: list[str]
-    preview_url: str
+    preview_url: str | None
     thumbnail: str
 
     @classmethod
@@ -16,7 +16,8 @@ class SongItem:
             name=song_item['name'],
             id=song_item['id'],
             artists=[artist['name'] for artist in song_item['artists']],
-            preview_url=song_item['preview_url'].split('?')[0],
+            preview_url=song_item['preview_url'].split('?')[0] if
+            song_item['preview_url'] is not None else None,
             thumbnail=song_item['album']['images'][1]['url']
         )