MVP ready. Fully functional (registration? moderation, profiles vew)

services/bot/app/utils/common.py

@@ -0,0 +1,15 @@
+from __future__ import annotations
+from datetime import date
+from typing import List, Optional
+
+def csv_to_list(s: Optional[str]) -> List[str]:
+    return [x.strip() for x in (s or "").split(",") if x.strip()]
+
+def list_to_csv(items: List[str]) -> str:
+    return ", ".join([i.strip() for i in items if i.strip()])
+
+def calc_age(born: Optional[date]) -> Optional[int]:
+    if not born:
+        return None
+    today = date.today()
+    return today.year - born.year - ((today.month, today.day) < (born.month, born.day))