kin: BATON-BIZ-001-backend_dev

backend/db.py

@@ -352,6 +352,30 @@ async def update_registration_status(reg_id: int, status: str) -> bool:
     return changed
 
 
+async def get_registration_by_login_or_email(login_or_email: str) -> Optional[dict]:
+    async with _get_conn() as conn:
+        async with conn.execute(
+            """
+            SELECT id, email, login, password_hash, status, push_subscription, created_at
+            FROM registrations
+            WHERE login = ? OR email = ?
+            """,
+            (login_or_email, login_or_email),
+        ) as cur:
+            row = await cur.fetchone()
+    if row is None:
+        return None
+    return {
+        "id": row["id"],
+        "email": row["email"],
+        "login": row["login"],
+        "password_hash": row["password_hash"],
+        "status": row["status"],
+        "push_subscription": row["push_subscription"],
+        "created_at": row["created_at"],
+    }
+
+
 async def save_telegram_batch(
     message_text: str,
     signals_count: int,