public TaskItemViewModel (TaskItem taskItem)
{
task = taskItem;
this.SaveCommand = new Command (async (temp) => {
// App.Database.SaveTask(task);
bool success = await App.Client.SaveTask(task);
if (success) Navigation.PopAsync();
// Broadcast this message for other viewmodel
MessagingCenter.Send<TaskItemViewModel, TaskItem>(this, "TaskAdded", task);
});
this.DeleteCommand = new Command (async (temp) => {
// App.Database.DeleteTask(task.ID);
bool success = await App.Client.DeleteTask(task.ID);
if (success) Navigation.PopAsync();
MessagingCenter.Send<TaskItemViewModel, TaskItem>(this, "TaskDeleted", task);
});
this.ResetCommand = new Command (() => {
this.Task = "";
this.Description = "";
this.DueDate = DateTime.Today;
this.Done = false;
});
}
/// <summary>
/// Creates a new task on the Todo web server.
/// </summary>
/// <returns>Success or not.</returns>
/// <param name="task">TaskItem instance.</param>
public async Task<bool> NewTask(TaskItem task) {
var json = JsonConvert.SerializeObject (task, Formatting.Indented, new JsonSerializerSettings {
ContractResolver = new LowercaseContractResolver() // turn property names into lowercase
});
var response = await _restClient.Post<TodoResponse> ("tasks/", json);
dispDialog (response);
return response.Ok;
}
public int SaveTask (TaskItem task) {
lock (locker) {
if (task.ID != 0) {
database.Update (task);
return task.ID;
} else {
return database.Insert (task);
}
}
}
/// <summary>
/// Creates or updates a task.
/// </summary>
/// <param name="task">Task.</param>
public async Task<bool> SaveTask(TaskItem task) {
bool b;
if (task.ID == 0) {
b = await NewTask (task);
}
else {
b = await UpdateTask (task);
}
return b;
}
public TaskCellViewModel (TaskItem taskItem)
{
task = taskItem;
this.SetDoneCommand = new Command (() => {
Done = !Done;
});
this.TaskEditCommand = new Command (() => {
MessagingCenter.Send<TaskCellViewModel, TaskItem>(this, "TaskTapped", task);
});
}
/// <summary>
/// Fetches the task with corresponding ID.
/// </summary>
/// <returns>The task.</returns>
public async Task<TaskItem> FetchTask(int id) {
string parameters = string.Format ("tasks/{0}", id);
var response = await _restClient.Get<TodoResponse> (parameters);
TaskItem task = new TaskItem();
if (response.Ok)
task = JsonConvert.DeserializeObject<TaskItem> (response.Body);
else {
dispDialog (response);
}
return task;
}
/// <summary>
/// Initializes a new instance of the <see cref="CloneDo.Mvvm.ViewModels.TodoListViewModel"/> class.
/// </summary>
public TodoListViewModel ()
{
// Initialize
LoadTasks ();
// Commands
this.NewTaskCommand = new Command (() => {
TaskItem newTask = new TaskItem();
TaskItemViewModel vm = new TaskItemViewModel(newTask);
Navigation.PushAsync(ViewFactory.CreatePage(vm));
});
this.ReloadCommand = new Command (() => {
LoadTasks();
});
// Messages
MessagingCenter.Subscribe<TaskItemViewModel, TaskItem> (this, "TaskAdded", (sender, task) => {
LoadTasks();
});
MessagingCenter.Subscribe<TaskItemViewModel, TaskItem> (this, "TaskDeleted", (sender, task) => {
LoadTasks();
});
MessagingCenter.Subscribe<TaskCellViewModel, TaskItem> (this, "TaskSetDone", (sender, task) => {
System.Diagnostics.Debug.WriteLine("TodoListViewModel::Task set done.");
LoadTasks();
});
MessagingCenter.Subscribe<TaskCellViewModel, TaskItem> (this, "TaskTapped", (sender, task) => {
TaskTapped(task.ID);
});
MessagingCenter.Subscribe<TodoClient, TodoResponse> (this, "StatusMessage", (sender, response) => {
System.Diagnostics.Debug.WriteLine("TodoListViewModel::Status dialog here");
Navigation.DisplayAlert(response.Ok?"Success":"Error", response.Message, "Ok");
Navigation.PopToRootAsync();
});
MessagingCenter.Subscribe<TodoClient, string> (this, "ErrMessage", (sender, message) => {
Navigation.DisplayAlert("Error!", message, "Ok");
// Navigation.PopAsync();
});
}
/// <summary>
/// Updates the task on the web server.
/// </summary>
/// <returns>The task.</returns>
/// <param name="task">Task.</param>
public async Task<bool> UpdateTask(TaskItem task) {
var json = JsonConvert.SerializeObject (task, Formatting.Indented, new JsonSerializerSettings {
ContractResolver = new LowercaseContractResolver() // turn property names into lowercase
});
string parameters = string.Format ("tasks/{0}", task.ID);
var response = await _restClient.Put<TodoResponse> (parameters, json);
dispDialog (response);
return response.Ok;
}
