Multi-Chess/fh.fd.ci.server/src/main/java/de/fd/fh/server/user/UserService.java

package de.fd.fh.server.user;

import de.fd.fh.server.user.events.ChangePasswordEvent;
import de.fd.fh.server.user.events.ChangeUserNameEvent;
import de.fd.fh.shared.network.messages.ChangeUserRequest;
import de.fd.fh.shared.network.messages.UserRequest;
import lombok.RequiredArgsConstructor;

import java.util.Observable;

@RequiredArgsConstructor
public class UserService extends Observable
{
    private final UserRepository userRepository;

    public User changePlayer(final UserId userId, final ChangeUserRequest message)
    {
        User user = userRepository.findUserById(userId);

        if (message.getPassword() != null)
        {
            setChanged();
            notifyObservers(new ChangePasswordEvent(userId, message.getPassword()));
        }

        if (message.getName() != null)
        {
            if (userRepository.findUserByName(message.getName()) == null)
            {
                user.rename(message.getName());
                userRepository.save(user);

                setChanged();
                notifyObservers(new ChangeUserNameEvent(userId, message.getName()));
            }
        }

        return user;
    }

    public User getPlayer(final UserId id)
    {
        return userRepository.findUserById(id);
    }

    public UserRequest getSmallPlayer(final UserId userId)
    {
        final User user = userRepository.findUserById(userId);

        if(user == null)
        {
            return null;
        }

        return new UserRequest(user.getId().getIdentifier(), user.getName());
    }
}