Nightly: refactor readability, progress callbacks, and resource handling

addon/plugin_interface.py

@@ -4,7 +4,7 @@
 from __future__ import annotations
 
 from abc import ABC, abstractmethod
-from typing import Any, Dict, List, Optional, Set, Tuple
+from typing import Any, Callable, Dict, List, Optional, Set, Tuple
 
 
 class BasisPlugin(ABC):
@@ -15,7 +15,11 @@ class BasisPlugin(ABC):
     prefer_source_metadata: bool = False
 
     @abstractmethod
-    async def search_titles(self, query: str) -> List[str]:
+    async def search_titles(
+        self,
+        query: str,
+        progress_callback: Optional[Callable[[str, Optional[int]], Any]] = None,
+    ) -> List[str]:
         """Liefert eine Liste aller Treffer fuer die Suche."""
 
     @abstractmethod