private bool IsEmailAvailable(Command command, Photographer photographer)
{
var existingPhotographer = _repository.FindByEmail(photographer.Email);
if (existingPhotographer != null && existingPhotographer.Id != photographer.Id && !existingPhotographer.Equals(photographer))
{
_bus.RaiseEvent(new DomainNotification(command.GetCommandName(), "The photographer e-mail has already been taken."));
return(false);
}
return(true);
}