refactored project structure

lib/repositories/interfaces/task_repository.dart

@@ -0,0 +1,27 @@
+import '../../model/task.dart';
+
+abstract class TaskRepository {
+  // Create
+
+  Future<void> createTask(Task task);
+
+  Future<void> createTaskOrderEntry(String taskOrder);
+
+  // Read
+
+  Future<List<Task>> loadTasks();
+
+  Future<List<String>> loadTaskOrder();
+
+  // Update
+
+  Future<void> updateTask(Task task);
+
+  Future<void> updateTaskOrder(List<String> taskOrder);
+
+  // Delete
+
+  Future<void> deleteTask(Task task);
+
+  Future<void> deleteTaskOrderEntry(String taskOrderEntry);
+}