1 files changed, 101 insertions, 0 deletions
diff --git a/src/frontend/app/hooks/usePlanner.ts b/src/frontend/app/hooks/usePlanner.ts
new file mode 100644
index 0000000..1572896
--- /dev/null
+++ b/src/frontend/app/hooks/usePlanner.ts
@@ -0,0 +1,101 @@
+import { useEffect, useState } from "react";
+import {
+  type PlannerSearchResult,
+  type RoutePlan,
+  planRoute,
+} from "../data/PlannerApi";
+
+const STORAGE_KEY = "planner_last_route";
+const EXPIRY_MS = 2 * 60 * 60 * 1000; // 2 hours
+
+interface StoredRoute {
+  timestamp: number;
+  origin: PlannerSearchResult;
+  destination: PlannerSearchResult;
+  plan: RoutePlan;
+}
+
+export function usePlanner() {
+  const [origin, setOrigin] = useState<PlannerSearchResult | null>(null);
+  const [destination, setDestination] = useState<PlannerSearchResult | null>(
+    null
+  );
+  const [plan, setPlan] = useState<RoutePlan | null>(null);
+  const [loading, setLoading] = useState(false);
+  const [error, setError] = useState<string | null>(null);
+
+  // Load from storage on mount
+  useEffect(() => {
+    const stored = localStorage.getItem(STORAGE_KEY);
+    if (stored) {
+      try {
+        const data: StoredRoute = JSON.parse(stored);
+        if (Date.now() - data.timestamp < EXPIRY_MS) {
+          setOrigin(data.origin);
+          setDestination(data.destination);
+          setPlan(data.plan);
+        } else {
+          localStorage.removeItem(STORAGE_KEY);
+        }
+      } catch (e) {
+        localStorage.removeItem(STORAGE_KEY);
+      }
+    }
+  }, []);
+
+  const searchRoute = async (
+    from: PlannerSearchResult,
+    to: PlannerSearchResult,
+    time?: Date,
+    arriveBy: boolean = false
+  ) => {
+    setLoading(true);
+    setError(null);
+    try {
+      const result = await planRoute(
+        from.lat,
+        from.lon,
+        to.lat,
+        to.lon,
+        time,
+        arriveBy
+      );
+      setPlan(result);
+      setOrigin(from);
+      setDestination(to);
+
+      // Save to storage
+      const toStore: StoredRoute = {
+        timestamp: Date.now(),
+        origin: from,
+        destination: to,
+        plan: result,
+      };
+      localStorage.setItem(STORAGE_KEY, JSON.stringify(toStore));
+    } catch (err) {
+      setError("Failed to calculate route. Please try again.");
+      setPlan(null);
+    } finally {
+      setLoading(false);
+    }
+  };
+
+  const clearRoute = () => {
+    setPlan(null);
+    setOrigin(null);
+    setDestination(null);
+    localStorage.removeItem(STORAGE_KEY);
+  };
+
+  return {
+    origin,
+    setOrigin,
+    destination,
+    setDestination,
+    plan,
+    loading,
+    error,
+    searchRoute,
+    clearRoute,
+  };
+}