Beginning to use different contexts

frontend/lib/structs/landmark.dart

@@ -38,6 +38,17 @@ class Landmark {
     };
   }
 
+
+    Map<String, dynamic> toJson() {
+      return {
+        'name': name,
+        'location': location,
+        'type': type.name,
+        // 'description': description,
+        // 'duration': duration.inMinutes,
+        // 'visited': visited
+      };
+    }
 }