Refactor and start implementing inline keyboards

access_control.py

@@ -13,7 +13,7 @@ class AccessControl:
                 return json.load(f)
         except FileNotFoundError:
             return {}
-    
+
     def _save_access(self):
         with open(self._ACCESS_FILE, "w") as f:
             json.dump(self._access, f)
@@ -21,12 +21,12 @@ class AccessControl:
     def get_grantor(self, user_id: str, gate: str) -> str:
         access = self._access.get(user_id, {})
         entry = access.get(gate) or access.get("all")
-        return entry.get("grantor", "")
+        return entry.get("grantor", "") if entry else ""
 
     def can_open_gate(self, user_id: str, gate: str) -> bool:
         access = self._access.get(user_id, {})
         entry = access.get(gate) or access.get("all")
-        if not entry or entry["type"] != "timed":
+        if not entry or entry.get("type") != "timed":
             return False
         if datetime.now(timezone.utc) < datetime.fromisoformat(entry["expires_at"].replace("Z", "+00:00")):
             return True