created callback model for task

lib/model/callback_models/create_task_request.dart

@@ -0,0 +1,57 @@
+import '../location.dart';
+import '../task.dart';
+
+class CreateTaskRequest {
+  final String title;
+  final String description;
+  final DateTime? start;
+  final DateTime? due;
+  final bool isCompleted;
+  final String category;
+  final List<Task> subtasks;
+  final List<DateTime> alarms;
+  final Location? location;
+  final String url;
+
+  CreateTaskRequest({
+    required this.title,
+    required this.description,
+    required this.start,
+    required this.due,
+    required this.isCompleted,
+    required this.category,
+    required this.subtasks,
+    required this.alarms,
+    required this.location,
+    required this.url,
+  });
+
+  CreateTaskRequest.fromTask(Task task)
+    : title = task.title,
+      description = task.description,
+      start = task.start,
+      due = task.due,
+      isCompleted = task.isCompleted,
+      category = task.category,
+      subtasks = task.subtasks,
+      alarms = task.alarms,
+      location = task.location,
+      url = task.url;
+
+  Task toTask({required String id, required int position}) {
+    return Task(
+      id: id,
+      title: title,
+      description: description,
+      start: start,
+      due: due,
+      isCompleted: isCompleted,
+      category: category,
+      subtasks: subtasks,
+      alarms: alarms,
+      location: location,
+      url: url,
+      position: position,
+    );
+  }
+}