Massive update

drb-frontend/lib/useAlerts.ts

@@ -0,0 +1,95 @@
+"use client";
+
+import { useEffect, useState } from "react";
+import { collection, onSnapshot, query, orderBy, limit, where, FirestoreError } from "firebase/firestore";
+import { onAuthStateChanged } from "firebase/auth";
+import { db, auth } from "@/lib/firebase";
+import type { AlertEvent } from "@/lib/types";
+
+const toISO = (v: unknown): string =>
+  (v as { toDate?: () => Date })?.toDate?.()?.toISOString?.() ??
+  (typeof v === "string" ? v : new Date().toISOString());
+
+export function useAlerts(limitCount = 50) {
+  const [alerts, setAlerts] = useState<AlertEvent[]>([]);
+  const [loading, setLoading] = useState(true);
+  const [error, setError] = useState<string | null>(null);
+
+  useEffect(() => {
+    let unsubFirestore: (() => void) | undefined;
+
+    const unsubAuth = onAuthStateChanged(auth, (user) => {
+      if (unsubFirestore) { unsubFirestore(); unsubFirestore = undefined; }
+
+      if (!user) {
+        setAlerts([]);
+        setLoading(false);
+        return;
+      }
+
+      const q = query(
+        collection(db, "alert_events"),
+        orderBy("triggered_at", "desc"),
+        limit(limitCount)
+      );
+      unsubFirestore = onSnapshot(q, (snap) => {
+        setAlerts(snap.docs.map((d) => {
+          const data = d.data();
+          return {
+            ...data,
+            triggered_at: toISO(data.triggered_at),
+          } as AlertEvent;
+        }));
+        setLoading(false);
+      }, (err: FirestoreError) => {
+        console.error("useAlerts:", err);
+        setError(err.message);
+        setLoading(false);
+      });
+    });
+
+    return () => {
+      unsubAuth();
+      if (unsubFirestore) unsubFirestore();
+    };
+  }, [limitCount]);
+
+  return { alerts, loading, error };
+}
+
+export function useUnacknowledgedAlerts() {
+  const [alerts, setAlerts] = useState<AlertEvent[]>([]);
+
+  useEffect(() => {
+    let unsubFirestore: (() => void) | undefined;
+
+    const unsubAuth = onAuthStateChanged(auth, (user) => {
+      if (unsubFirestore) { unsubFirestore(); unsubFirestore = undefined; }
+
+      if (!user) {
+        setAlerts([]);
+        return;
+      }
+
+      const q = query(
+        collection(db, "alert_events"),
+        where("acknowledged", "==", false),
+        orderBy("triggered_at", "desc"),
+        limit(100)
+      );
+      unsubFirestore = onSnapshot(q, (snap) => {
+        setAlerts(snap.docs.map((d) => {
+          const data = d.data();
+          return { ...data, triggered_at: toISO(data.triggered_at) } as AlertEvent;
+        }));
+      }, (err: FirestoreError) => { console.error("useUnacknowledgedAlerts:", err); });
+    });
+
+    return () => {
+      unsubAuth();
+      if (unsubFirestore) unsubFirestore();
+    };
+  }, []);
+
+  return alerts;
+}