public NewGroupViewModel(INavigationService navigationService, IPageDialogService dialogService)
: base(navigationService, dialogService)
{
Group = new GroupItem
{
Id = null,
CreatedUserId = GlobalAttributes.User.Id,
GroupName = null,
};
// Init and add yourself.
var myself = new GroupUserItem()
{
RefGroupId = Group.Id
,
RefUser = GlobalAttributes.User
,
RefUserId = GlobalAttributes.User.Id
,
AdminFlg = true
};
Task.Run(() => Service.ImageService.SetImageSource(myself.RefUser));
GroupUserItems = new ObservableCollection <GroupUserItem> {
myself
};
NewGroupUser = new GroupUserItem();
ImageSelectCommand = new DelegateCommand(imageSelect);
SubmitCommand = new DelegateCommand(submitGroup);
AddUserCommand = new DelegateCommand(addUser);
DeleteCommand = new DelegateCommand <GroupUserItem>(deleteUser);
AuthPicker = Constants.AuthPicker.Select(x => x.Label).ToList();
}
protected async void deleteUser(GroupUserItem item)
{
string message = this.getErrorMessageDeleteGroupUser(item);
if (message != null)
{
await dialogService.DisplayAlertAsync
(
"Error",
message,
"Confirm"
);
return;
}
var accepted = await dialogService.DisplayAlertAsync
(
"Confirmation",
$"Do you want to remove group user '{item.RefUser.NameAndEmail}'?",
"Confirm",
"Cancel"
);
if (accepted)
{
this.GroupUserItems.Remove(item);
}
}
public BaseGroupViewModel(INavigationService navigationService, IPageDialogService dialogService)
: base(navigationService, dialogService)
{
Group = new GroupItem();
GroupUserItems = new ObservableCollection <GroupUserItem> ();
NewGroupUser = new GroupUserItem();
ImageSelectCommand = new DelegateCommand(imageSelect);
SubmitCommand = new DelegateCommand(submitGroup);
AddUserCommand = new DelegateCommand(addUser);
DeleteCommand = new DelegateCommand <GroupUserItem>(deleteUser);
AuthPicker = Constants.AuthPicker.Select(x => x.Label).ToList();
}
protected async void addUser()
{
if (!GlobalAttributes.IsConnectedInternet)
{
await dialogService.DisplayAlertAsync("Error", "This feature only available with network access!", "OK");
return;
}
UserItem user = null;
string message = this.getErrorMessageGroupUser();
if (message == null)
{
user = await getUserByEmail();
message = "The Email address you entered does not exist in accounts";
}
if (user != null)
{
var groupUser = new GroupUserItem()
{
RefUser = user
,
RefUserId = user.Id
};
this.GroupUserItems.Add(groupUser);
// read user image
await Service.ImageService.SetImageSource(groupUser.RefUser);
this.NewGroupUser = new GroupUserItem();
}
else
{
await dialogService.DisplayAlertAsync
(
"Error",
message,
"OK"
);
//this.NewGroupUser.RefUser.Email = null;
}
}
/// <summary>
/// valid and get error message before delete user.
/// </summary>
/// <returns></returns>
protected string getErrorMessageDeleteGroupUser(GroupUserItem item)
{
// cannot delete userself.
if (item.Id == GlobalAttributes.User.Id)
{
return("Cannot delete yourself.");
}
//cannot delete last 1.
if (this.GroupUserItems.Count == 1)
{
return("Cannot delete last group user.");
}
//cannot delete last admin user.
if (item.AdminFlg && this.GroupUserItems.Where(x => x.AdminFlg).Count() == 1)
{
return("Cannot delete last admin user.");
}
return(null);
}
