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backend/services/heartbeat_service.py

@@ -0,0 +1,70 @@
+"""Heartbeat: DB záznam + volitelný HTTP pulz do Loxone."""
+
+from __future__ import annotations
+
+import logging
+import os
+
+import httpx
+
+from app.config import get_settings
+
+logger = logging.getLogger(__name__)
+
+EMS_BACKEND_VERSION = "v1.0.0"
+
+
+async def send_heartbeat(
+    site_id: int,
+    db,
+    loxone_host: str | None = None,
+    loxone_port: int | None = None,
+) -> None:
+    """
+    1. Aktualizuje ems.site_heartbeat v DB
+    2. Pokud je Loxone nakonfigurováno, pošle HTTP pulz
+    """
+    try:
+        endpoint = await db.fetchrow(
+            """
+            SELECT host, port, protocol, auth_reference
+            FROM ems.site_endpoint
+            WHERE site_id = $1 AND endpoint_type = 'loxone_http' AND enabled = true
+            ORDER BY id
+            LIMIT 1
+            """,
+            site_id,
+        )
+
+        loxone_ok = False
+        if endpoint:
+            proto = (endpoint["protocol"] or "http").lower()
+            if proto not in ("http", "https"):
+                proto = "http"
+            host = loxone_host if loxone_host is not None else endpoint["host"]
+            if loxone_port is not None:
+                port = int(loxone_port)
+            else:
+                port = int(endpoint["port"] or (443 if proto == "https" else 80))
+
+            url = f"{proto}://{host}:{port}/dev/sps/io/EMS_Heartbeat/1"
+            settings = get_settings()
+            user = settings.loxone_user or os.getenv("LOXONE_USER") or ""
+            password = settings.loxone_password or os.getenv("LOXONE_PASSWORD") or ""
+            auth = (user, password) if user else None
+            try:
+                async with httpx.AsyncClient(timeout=5.0) as client:
+                    await client.get(url, auth=auth)
+                loxone_ok = True
+            except Exception as e:
+                logger.warning("Heartbeat Loxone failed (site=%s): %s", site_id, e)
+
+        status = "ok" if (not endpoint or loxone_ok) else "degraded"
+        await db.execute(
+            "SELECT ems.fn_update_heartbeat($1, $2, $3)",
+            site_id,
+            status,
+            EMS_BACKEND_VERSION,
+        )
+    except Exception as e:
+        logger.error("Heartbeat service error (site=%s): %s", site_id, e)