second version

backend/services/notification_service.py

@@ -0,0 +1,65 @@
+"""Discord a další notifikace pro provoz EMS."""
+
+from __future__ import annotations
+
+import logging
+
+import httpx
+
+from app.config import get_settings
+
+logger = logging.getLogger(__name__)
+
+
+async def send_discord(message: str, level: str = "info") -> bool:
+    """
+    Pošle notifikaci na Discord webhook.
+    level: 'info', 'warning', 'error', 'critical'
+    Vrátí True při úspěchu.
+    """
+    settings = get_settings()
+    webhook_url = settings.discord_webhook_url
+    if not webhook_url:
+        logger.debug("Discord webhook not configured, skipping notification")
+        return False
+
+    emoji = {"info": "ℹ️", "warning": "⚠️", "error": "❌", "critical": "🚨"}.get(level, "ℹ️")
+
+    try:
+        async with httpx.AsyncClient(timeout=10) as client:
+            resp = await client.post(
+                webhook_url,
+                json={
+                    "content": f"{emoji} **EMS Alert** [{level.upper()}]\n{message}",
+                },
+            )
+            resp.raise_for_status()
+            return True
+    except Exception as e:
+        logger.warning("Discord notification failed: %s", e)
+        return False
+
+
+async def notify_modbus_mismatch(
+    asset_code: str,
+    register: int,
+    register_name: str,
+    value_written: int,
+    value_verified: int,
+    attempt: int,
+) -> None:
+    msg = (
+        f"Modbus mismatch na **{asset_code}**\n"
+        f"Registr: `0x{register:04X}` ({register_name})\n"
+        f"Zapsáno: `{value_written}` | Přečteno: `{value_verified}`\n"
+        f"Pokus č. {attempt}"
+    )
+    await send_discord(msg, level="error")
+
+
+async def notify_self_sustain_activated(site_code: str, reason: str) -> None:
+    msg = (
+        f"Přepnutí na **SELF_SUSTAIN** – lokalita `{site_code}`\n"
+        f"Důvod: {reason}"
+    )
+    await send_discord(msg, level="critical")