public async void CreateChatCommandExecute(object obj)
{
if (this.isCreating)
return;
this.isCreating = true;
if (Users == null)
return;
try
{
this.IsBusyIndicatorVisible = true;
var selectedUsers = Users.Where(u => u.IsSelected).Select(u => u.User).ToList();
if (selectedUsers.Any())
{
string dialogName = null;
DialogType dialogType = DialogType.Group;
if (selectedUsers.Count == 1)
{
dialogType = DialogType.Private;
dialogName = selectedUsers.First().FullName;
}
else
{
var promptResult = await
UserDialogs.Instance.PromptAsync("Enter chat name:", null, "Create", "Cancel",
"Enter chat name", InputType.Name);
if (promptResult.Ok)
{
dialogName = promptResult.Text;
if (string.IsNullOrWhiteSpace(dialogName))
dialogName = App.UserName + "_" +
string.Join(", ", selectedUsers.Select(u => u.FullName));
}
else
{
this.IsBusyIndicatorVisible = false;
this.isCreating = false;
return;
}
}
var userIds = selectedUsers.Select(u => u.Id).ToList();
var userIdsString = string.Join(",", userIds);
Dialog dialog = null;
if (dialogType == DialogType.Group)
{
dialog = await App.QbProvider.CreateDialogAsync(dialogName.Trim(), userIdsString, dialogType);
if (dialog != null)
{
SaveDialogToDb(dialog);
groupManager = App.QbProvider.GetXmppClient()
.GetGroupChatManager(dialog.XmppRoomJid, dialog.Id);
groupManager.MessageReceived += OnMessageReceived;
groupManager.JoinGroup(App.QbProvider.UserId.ToString());
await Task.Delay(1000);
groupManager.NotifyAboutGroupCreation(userIds, dialog);
return;
}
}
else if (dialogType == DialogType.Private)
{
dialog = await App.QbProvider.GetDialogAsync(new int[] { App.QbProvider.UserId, userIds.First() });
if (dialog == null)
{
dialog = await App.QbProvider.CreateDialogAsync(dialogName, userIdsString, dialogType);
var privateManager =
App.QbProvider.GetXmppClient()
.GetPrivateChatManager(selectedUsers.First().Id, dialog.Id);
var message = "Hello, I created chat with you!";
privateManager.SendMessage(message);
dialog.LastMessage = message;
}
SaveDialogToDb(dialog);
var privateChantPage = new PrivateChatPage(dialog.Id);
App.Navigation.InsertPageBefore(privateChantPage,
(App.Current.MainPage as NavigationPage).CurrentPage);
App.Navigation.PopAsync();
}
}
else
{
App.Current.MainPage.DisplayAlert("Error", "Please, select any of users", "Ok");
}
this.IsBusyIndicatorVisible = false;
}
catch (Exception ex)
{
}
this.isCreating = false;
}
protected override void OnElementChanged(VisualElementChangedEventArgs e)
{
base.OnElementChanged(e);
page = (PrivateChatPage)e.NewElement;
}