sql first refactor

backend/services/notification_service.py

@@ -3,6 +3,7 @@
 from __future__ import annotations
 
 import asyncio
+import json
 import logging
 from datetime import datetime
 
@@ -78,31 +79,26 @@ async def run_fn_set_mode_with_discord(
     notify_level: str | None = None,
 ) -> str:
     """
-    Zavolá ems.fn_set_mode. Při skutečné změně režimu pošle Discord (pokud je webhook).
+    Zavolá ems.fn_set_mode_with_context. Při skutečné změně režimu pošle Discord (pokud je webhook).
     Vrátí aktuální mode_code z DB po volání.
     """
-    prev = await conn.fetchval(
-        "SELECT mode_code FROM ems.site_operating_mode WHERE site_id = $1",
-        site_id,
-    )
-    await conn.execute(
-        "SELECT ems.fn_set_mode($1, $2, $3, $4, $5)",
+    raw = await conn.fetchval(
+        """
+        select ems.fn_set_mode_with_context($1::int, $2::text, $3::text, $4::timestamptz, $5::text)
+        """,
         site_id,
         mode_code,
         activated_by,
         valid_until,
         notes,
     )
-    new = await conn.fetchval(
-        "SELECT mode_code FROM ems.site_operating_mode WHERE site_id = $1",
-        site_id,
-    )
+    ctx = raw if isinstance(raw, dict) else json.loads(raw)
+    prev = ctx.get("previous_mode")
+    new = ctx.get("new_mode")
     if new is None:
         new = mode_code
+    site_code = ctx.get("site_code")
     if prev is not None and prev != new:
-        site_code = await conn.fetchval(
-            "SELECT code FROM ems.site WHERE id = $1", site_id
-        )
         await notify_operating_mode_changed(
             site_code or str(site_id),
             str(prev),