1 files changed, 67 insertions, 0 deletions
diff --git a/src/MVPtoMVVM.mvvm/viewmodels/MainWindowViewModel.cs b/src/MVPtoMVVM.mvvm/viewmodels/MainWindowViewModel.cs
new file mode 100644
index 0000000..2e59e0d
--- /dev/null
+++ b/src/MVPtoMVVM.mvvm/viewmodels/MainWindowViewModel.cs
@@ -0,0 +1,67 @@
+using System;
+using System.Collections.Generic;
+using System.Collections.ObjectModel;
+using System.ComponentModel;
+using System.Diagnostics;
+using System.Linq;
+using System.Linq.Expressions;
+using System.Windows.Input;
+using MVPtoMVVM.domain;
+using MVPtoMVVM.repositories;
+
+namespace MVPtoMVVM.mvvm.viewmodels
+{
+    public class MainWindowViewModel : INotifyPropertyChanged
+    {
+        private ITodoItemRepository todoItemRepository;
+        private Synchronizer<MainWindowViewModel> updater;
+
+        public MainWindowViewModel(ITodoItemRepository todoItemRepository)
+        {
+            this.todoItemRepository = todoItemRepository;
+            AddNewItemCommand = new SimpleCommand(AddNewItem);
+            CancelChangesCommand = new SimpleCommand(RefreshChanges);
+            updater = new Synchronizer<MainWindowViewModel>(this.PropertyChanged);
+            TodoItems = new ObservableCollection<TodoItemViewModel>();
+            RefreshChanges();
+        }
+
+        private void RefreshChanges()
+        {
+            TodoItems.Clear();
+            foreach (var item in todoItemRepository.GetAll().Select(MapFrom))
+            {
+                TodoItems.Add(item);
+            }
+            
+            updater.Update(x => x.TodoItems);
+        }
+
+        private void AddNewItem()
+        {
+            TodoItems.Add(new TodoItemViewModel(todoItemRepository){Parent =  this});
+            updater.Update(x => x.TodoItems);
+        }
+
+        private TodoItemViewModel MapFrom(TodoItem x)
+        {
+            return new TodoItemViewModel(todoItemRepository)
+                       {
+                           Id = x.Id,
+                           Description =  x.Description,
+                           DueDate = x.DueDate,                                                                        
+                           Parent = this,
+                       };
+        }
+
+        public ICollection<TodoItemViewModel> TodoItems { get; set; }
+        public event PropertyChangedEventHandler PropertyChanged = (o,e)=> { };
+        public ICommand CancelChangesCommand { get; set; }
+        public ICommand AddNewItemCommand { get; set; }
+
+        public void Update(Expression<Func<MainWindowViewModel, object>> property)
+        {
+            updater.Update(property);
+        }
+    }
+}
+\ No newline at end of file