/// <summary>
/// Adds the specified user to the list of current users.
/// The user name can either be a known user name (i.e. a user
/// that has already joined the schedule sometime before) or
/// a new user name (in this case the user's info is added to the DB).
/// </summary>
/// <param name="userVM"></param>
public async Task AddUserAsync(UserViewModel userVM, ErrorReporter errorReporter)
{
if (userVM == null)
{
errorReporter.Throw(
new ArgumentNullException(nameof(userVM),
UserErrorsViewModel.GenericErrorMessage));
}
if (string.IsNullOrWhiteSpace(userVM.Name))
{
errorReporter.Throw(
new ArgumentException("The name of the specified user is invalid", nameof(userVM)),
UserErrorsViewModel.UserNameInvalidMessage);
}
if (Users.Any(o => o.Name == userVM.Name))
{
errorReporter.Throw(
new ArgumentException($"The user name '{userVM.Name}' is already in use", nameof(userVM.Name)),
UserErrorsViewModel.UserNameAlreadyInUseMessage);
}
if (Schedule.Users.Any(o => o.Name == userVM.Name))
{
// This is a known user name
Users.Add(userVM);
AvailableUserNames.Remove(userVM.Name);
}
else
{
// The client is a new user
Users.Add(userVM);
// Create new known user in DB
var dbUser = new User {
Name = userVM.Name
};
await PaulRepository.AddUserToScheduleAsync(Schedule, dbUser);
}
}
