Introduce V2 of current and historical functions

wow_token/db/cache.py

@@ -0,0 +1,28 @@
+import datetime
+from typing import Dict, List, Tuple
+
+from wow_token.db.cached_range import CachedRange
+from wow_token.db.trinity import Trinity
+
+
+class Cache:
+    _cache : Dict[str, List[Tuple[datetime.datetime, int]]]
+    _db : 'Compacted'
+
+    def __init__(self, compacted_db: 'Compacted'):
+        self._db = compacted_db
+        self._cache = {}
+
+
+    def get_month(self, trinity: Trinity) -> List[Tuple[datetime.datetime, int]]:
+        current_time = datetime.datetime.now(datetime.UTC)
+        if isinstance(trinity.range, CachedRange):
+            raise NotImplementedError
+
+        current_month = trinity.range.month == current_time.month and trinity.range.year == current_time.year
+
+        if not current_month and str(trinity) in self._cache:
+            return self._cache[str(trinity)]
+
+        self._cache[str(trinity)] = self._db.ddb_get_data(trinity)
+        return self._cache[str(trinity)]