1 files changed, 110 insertions, 0 deletions
diff --git a/src/MVPtoMVVM.mvp/presenters/TodoItemPresenter.cs b/src/MVPtoMVVM.mvp/presenters/TodoItemPresenter.cs
new file mode 100644
index 0000000..6a9eb13
--- /dev/null
+++ b/src/MVPtoMVVM.mvp/presenters/TodoItemPresenter.cs
@@ -0,0 +1,110 @@
+using System;
+using MVPtoMVVM.domain;
+using MVPtoMVVM.mappers;
+using MVPtoMVVM.repositories;
+using MVPtoMVVM.views;
+
+namespace MVPtoMVVM.presenters
+{
+    public class TodoItemPresenter : ITodoItemPresenter
+    {
+        private ITodoItemRepository itemRepository;
+        private ITodoItemMapper itemMapper;
+        private ITodoItemView view;
+        public int Id { get; set; }
+
+        public TodoItemPresenter(ITodoItemRepository itemRepository, ITodoItemMapper itemMapper)
+        {
+            this.itemRepository = itemRepository;
+            this.itemMapper = itemMapper;
+        }
+
+        public void SetView(ITodoItemView view)
+        {
+            this.view = view;
+            InitializeView();
+        }
+
+        public void SetItem(TodoItem item)
+        {
+            Id = item.Id;
+            Description = item.Description;
+            DueDate = item.DueDate;
+            IsDirty = false;
+        }
+
+        private void InitializeView()
+        {
+            view.Id = Id;
+            view.Description = Description;
+            view.DueDate = DueDate;
+            view.SaveButtonEnabled = false;
+        }
+
+        public void SaveItem()
+        {
+            var item = itemMapper.MapFrom(this);
+            itemRepository.Save(item);
+            Id = item.Id;
+            IsDirty = false;
+        }
+
+        public void DeleteItem()
+        {
+            var item = itemMapper.MapFrom(this);
+            view.Remove(item.Id);
+            itemRepository.Delete(item);            
+        }
+
+        private string description;
+        public string Description
+        {
+            get { return description; }
+            set { description = value;
+                IsDirty = true;
+            }
+        }
+
+        private DateTime dueDate;
+        public DateTime DueDate
+        {
+            get { return dueDate; }
+            set { dueDate = value;
+                IsDirty = true;
+            }
+        }
+
+        private bool isDirty;
+        public bool IsDirty
+        {
+            get { return isDirty; }
+            private set { isDirty = value;
+            if (view != null)
+                UpdateControlState();
+            }
+        }
+
+        private void UpdateControlState()
+        {
+            view.SaveButtonEnabled = IsDirty && IsDescriptionValid() && IsDueDateValid();
+            view.DescriptionHasValidationErrors = !IsDescriptionValid();
+            view.DueDateHasValidationErrors = !IsDueDateValid();
+            view.IsDueSoon = IsDueSoon();
+        }
+
+        private bool IsDescriptionValid()
+        {
+            return description.Length > 0;
+        }
+
+        private bool IsDueDateValid()
+        {
+            return dueDate >= DateTime.Today;
+        }
+
+        private bool IsDueSoon()
+        {
+            return dueDate <= DateTime.Today.AddDays(1);
+        }
+    }
+}
+\ No newline at end of file