Cleanup, more typing for queries

core/db.py

@@ -0,0 +1,19 @@
+from enum import Enum
+from enum import unique
+from typing import Dict
+from typing import Any
+from typing import Optional
+
+from config import DB
+
+_Q = Dict[str, Any]
+_Doc = Optional[Dict[str, Any]]
+
+
+@unique
+class CollectionName(Enum):
+    ACTIVITIES = "activities"
+
+
+def find_one_activity(q: _Q) -> _Doc:
+    return DB[CollectionName.ACTIVITIES.value].find_one(q)