public void CompleteItem(Guid guid, TodoList todoList)
{
if (todoList == null)
{
throw new ArgumentNullException("todoList");
}
var result = todoList.Items.SingleOrDefault(x => x.Id == guid);
if (result == null)
{
throw new ArgumentException("Item does not exist in list.");
}
if (result.IsCompleted)
{
throw new ArgumentException("Item is already completed.");
}
result.IsCompleted = true;
_notificationManager.NotifyOfCompletedTask(result.Name);
}
public Guid AddItem(string name, TodoList todoList)
{
if (name == null)
{
throw new ArgumentNullException("name");
}
if (todoList == null)
{
throw new ArgumentNullException("todoList");
}
var item = new TodoItem
{
Id = Guid.NewGuid(),
IsCompleted = false,
Name = name
};
todoList.Items.Add(item);
return(item.Id);
}
