public CreateUserViewModel()
{
CreateCommand = new RelayCommand(() =>
{
if (Username == null)
return;
if(Username.Trim().Length<3)
{
Notifier.ShowMessage("Please enter at least 3 character for a user name!");
return;
}
if(StudentRepository.GetStudents().Select(s=>s.Username).Contains(Username))
{
Notifier.ShowMessage($"{Username} already exist. Please specify a different one.");
return;
}
Student student = new Student()
{
Username = Username
};
StudentRepository.Add(student);
StudentRepository.Logged = StudentRepository.GetStudents().Where(s => s.Username == student.Username).First();
PerfomanceMonitor.PopulateLetters();
LessonRepository.PopulateUserLessons();
Notifier.ShowMessage($"{Username} created successfully");
DialogService.HideDialog(GetType());
DialogService.ShowDialog(typeof(MainVM));
DialogService.CloseDialog(GetType());
});
CancelCommand = new RelayCommand(() => DialogService.CloseDialog(GetType()));
}