ui improvements for trips and landmarks

frontend/lib/structs/landmark.dart

@@ -3,6 +3,14 @@ import 'dart:convert';
 
 import 'package:shared_preferences/shared_preferences.dart';
 
+
+const LandmarkType museum = LandmarkType(name: 'Museum');
+const LandmarkType monument = LandmarkType(name: 'Monument');
+const LandmarkType park = LandmarkType(name: 'Park');
+const LandmarkType restaurant = LandmarkType(name: 'Restaurant');
+const LandmarkType shop = LandmarkType(name: 'Shop');
+
+
 final class Landmark extends LinkedListEntry<Landmark>{
   // A linked node of a list of Landmarks
   final String uuid;
@@ -55,11 +63,12 @@ final class Landmark extends LinkedListEntry<Landmark>{
       final imageURL = json['image_url'] as String?;
       final description = json['description'] as String?;
       var duration = Duration(minutes: json['duration'] ?? 0) as Duration?;
-      if (duration == const Duration()) {duration = null;};
+      // if (duration == const Duration()) {duration = null;};
       final visited = json['visited'] as bool?;
+      var tripTime = Duration(minutes: json['time_to_reach_next'] ?? 0) as Duration?;
       
       return Landmark(
-        uuid: uuid, name: name, location: locationFixed, type: typeFixed, isSecondary: isSecondary, imageURL: imageURL, description: description, duration: duration, visited: visited);
+        uuid: uuid, name: name, location: locationFixed, type: typeFixed, isSecondary: isSecondary, imageURL: imageURL, description: description, duration: duration, visited: visited, tripTime: tripTime);
     } else {
       throw FormatException('Invalid JSON: $json');
     }
@@ -81,7 +90,8 @@ final class Landmark extends LinkedListEntry<Landmark>{
     'image_url': imageURL,
     'description': description,
     'duration': duration?.inMinutes,
-    'visited': visited
+    'visited': visited,
+    'trip_time': tripTime?.inMinutes,
   };
 }
 

frontend/lib/structs/linked_landmarks.dart

@@ -1,46 +0,0 @@
-// import "package:anyway/structs/landmark.dart";
-
-// class Linked<Landmark> {
-//   Landmark? head;
-  
-//   Linked();
-
-//   // class methods
-//   bool get isEmpty => head == null;
-
-//   // Add a new node to the end of the list
-//   void add(Landmark value) {
-//     if (isEmpty) {
-//       // If the list is empty, set the new node as the head
-//       head = value;
-//     } else {
-//       Landmark? current = head;
-//       while (current!.next != null) {
-//         // Traverse the list to find the last node
-//         current = current.next;
-//       }
-//       current.next = value; // Set the new node as the next node of the last node
-//     }
-//   }
-
-//   // Remove the first node with the given value
-//   void remove(Landmark value) {
-//     if (isEmpty) return;
-
-//     // If the value is in the head node, update the head to the next node
-//     if (head! == value) {
-//       head = head.next;
-//       return;
-//     }
-
-//     var current = head;
-//     while (current!.next != null) {
-//       if (current.next! == value) {
-//         // If the value is found in the next node, skip the next node
-//         current.next = current.next.next;
-//         return;
-//       }
-//       current = current.next;
-//     }
-//   }
-// }

frontend/lib/structs/trip.dart

@@ -16,11 +16,15 @@ class Trip with ChangeNotifier {
   // could be empty as well
 
   Future<String> get cityName async {
+    List<double>? location = landmarks.firstOrNull?.location; 
     if (GeocodingPlatform.instance == null) {
-      return '${landmarks.first.location[0]}, ${landmarks.first.location[1]}';
+      return '$location';
+    } else if (location == null) {
+      return 'Unknown';
+    } else{
+      List<Placemark> placemarks = await placemarkFromCoordinates(location[0], location[1]);
+      return placemarks.first.locality ?? 'Unknown';
     }
-    List<Placemark> placemarks = await placemarkFromCoordinates(landmarks.first.location[0], landmarks.first.location[1]);
-    return placemarks.first.locality ?? 'Unknown';
   }
 
 
@@ -56,6 +60,11 @@ class Trip with ChangeNotifier {
     notifyListeners();
   }
 
+  void removeLandmark(Landmark landmark) {
+    landmarks.remove(landmark);
+    notifyListeners();
+  }
+
   factory Trip.fromPrefs(SharedPreferences prefs, String uuid) {
     String? content = prefs.getString('trip_$uuid');
     Map<String, dynamic> json = jsonDecode(content!);