Make the Adapter base class an ABC; started AdapterManager

sublime/adapters/filesystem/adapter.py

@@ -0,0 +1,58 @@
+from typing import Any, Dict, List, Tuple
+from pathlib import Path
+
+from sublime.adapters.api_objects import (Playlist, PlaylistDetails)
+from .. import CachingAdapter
+
+
+class FilesystemAdapter(CachingAdapter):
+    """
+    Defines an adapter which retrieves its data from the local filesystem.
+    """
+
+    # Configuration and Initialization Properties
+    # =========================================================================
+    @staticmethod
+    def get_config_parameters() -> List[Tuple[str, str]]:  # TODO fix
+        return []
+
+    @staticmethod
+    def verify_configuration(config: Dict[str, Any]) -> Dict[str, str]:
+        return {}
+
+    def __init__(
+        self,
+        config: dict,
+        data_directory: Path,
+        is_cache: bool = False,
+    ):
+        pass
+
+    # Usage Properties
+    # =========================================================================
+    can_be_cache: bool = True
+    can_be_cached: bool = False
+
+    # Availability Properties
+    # =========================================================================
+    can_service_requests: bool = True
+
+    # Data Retrieval Methods
+    # =========================================================================
+    can_get_playlists: bool = True
+
+    def get_playlists(self) -> List[Playlist]:
+        return []
+
+    can_get_playlist_details: bool = True
+
+    def get_playlist_details(
+            self,
+            playlist_id: str,
+    ) -> PlaylistDetails:
+        raise NotImplementedError()
+
+    # Data Ingestion Methods
+    # =========================================================================
+    def ingest_new_data(self):  # TODO: actually ingest data
+        pass