x

frontend/src/hooks/useTelemetryToday.ts

@@ -23,10 +23,12 @@ export type TelemetryChartPoint = {
 export function useTelemetryToday(siteId: number | null) {
   const [points, setPoints] = useState<TelemetryChartPoint[]>([])
   const [ready, setReady] = useState(false)
+  const [error, setError] = useState<string | null>(null)
 
   const load = useCallback(async () => {
     if (siteId == null) {
       setPoints([])
+      setError(null)
       setReady(true)
       return
     }
@@ -37,6 +39,7 @@ export function useTelemetryToday(siteId: number | null) {
       })
       if (!Array.isArray(rows) || rows.length === 0) {
         setPoints([])
+        setError(null)
         return
       }
       const mapped: TelemetryChartPoint[] = rows.map((r) => {
@@ -55,8 +58,10 @@ export function useTelemetryToday(siteId: number | null) {
         }
       })
       setPoints(mapped)
+      setError(null)
     } catch {
       setPoints([])
+      setError('Hodinová data auditu se nepodařila načíst')
     } finally {
       setReady(true)
     }
@@ -68,5 +73,5 @@ export function useTelemetryToday(siteId: number | null) {
     return () => window.clearInterval(id)
   }, [load])
 
-  return { points, ready, hasChartData: points.length > 0 }
+  return { points, ready, error, hasChartData: points.length > 0, reload: load }
 }