add second searchbar to search by geographical zone

covas_mobile/lib/pages/ListItemMenu.dart

@@ -45,6 +45,9 @@ class _MyHomePageState extends State<ListItemMenu> {
   List<Events> filteredPosts = [];
   late SearchBar searchBar;
 
+  String geographicalZone = '';
+  String query = '';
+
   // function to fetch data from api and return future list of posts
   static Future<List<Events>> getPosts() async {
     SharedPreferences prefs = await SharedPreferences.getInstance();
@@ -83,20 +86,29 @@ class _MyHomePageState extends State<ListItemMenu> {
         MaterialPageRoute(builder: (_) => Camera(camera: value.first))));
   }
 
-  void _filterPosts(String query) async {
-    if (query.isNotEmpty) {
+  void _filterPosts() async {
+    if (query.isNotEmpty || geographicalZone.isNotEmpty) {
       List<Events> results = await searchPosts(query);
       setState(() {
-        filteredPosts = results;
+        filteredPosts = _applyFilters(results);
       });
     } else {
-      // Reset to full list or clear results
       setState(() {
         filteredPosts.clear();
       });
     }
   }
 
+  List<Events> _applyFilters(List<Events> posts) {
+    return posts.where((post) {
+      final matchesQuery =
+          post.name!.toLowerCase().contains(query.toLowerCase());
+      final matchesZone = geographicalZone.isEmpty ||
+          post.place!.toLowerCase().contains(geographicalZone.toLowerCase());
+      return matchesQuery && matchesZone;
+    }).toList();
+  }
+
   // build function
   @override
   Widget build(BuildContext context) {
@@ -117,26 +129,42 @@ class _MyHomePageState extends State<ListItemMenu> {
           ),
         ],
       ),
-      body: Center(
-        // FutureBuilder
-        child: FutureBuilder<List<Events>>(
-          future: postsFuture,
-          builder: (context, snapshot) {
-            if (snapshot.connectionState == ConnectionState.waiting) {
-              // until data is fetched, show loader
-              return const CircularProgressIndicator();
-            } else if (snapshot.hasData) {
-              // once data is fetched, display it on screen (call buildPosts())
-              final posts = snapshot.data!;
-              final displayedPosts =
-                  filteredPosts.isEmpty ? posts : filteredPosts;
-              return buildPosts(displayedPosts);
-            } else {
-              // if no data, show simple Text
-              return const Text("No data available");
-            }
-          },
-        ),
+      body: Column(
+        children: [
+          // New Search Bar for Geographical Zone
+          Padding(
+            padding: const EdgeInsets.all(8.0),
+            child: TextField(
+              decoration: InputDecoration(
+                labelText: 'Search by geographical zone',
+                border: OutlineInputBorder(),
+              ),
+              onChanged: (value) {
+                setState(() {
+                  geographicalZone = value;
+                });
+                _filterPosts(); // Call the filtering function
+              },
+            ),
+          ),
+          Expanded(
+            child: FutureBuilder<List<Events>>(
+              future: postsFuture,
+              builder: (context, snapshot) {
+                if (snapshot.connectionState == ConnectionState.waiting) {
+                  return const CircularProgressIndicator();
+                } else if (snapshot.hasData) {
+                  final posts = snapshot.data!;
+                  final displayedPosts =
+                      filteredPosts.isEmpty ? posts : filteredPosts;
+                  return buildPosts(displayedPosts);
+                } else {
+                  return const Text("No data available");
+                }
+              },
+            ),
+          ),
+        ],
       ),
     );
   }