no-copy/src/main/java/ru/soune/nocopy/handler/LoginRequestHandler.java

package ru.soune.nocopy.handler;

import com.fasterxml.jackson.databind.ObjectMapper;
import lombok.RequiredArgsConstructor;
import org.springframework.stereotype.Component;
import ru.soune.nocopy.dto.*;
import ru.soune.nocopy.dto.register.LoginAnswer;
import ru.soune.nocopy.dto.register.LoginRequest;
import ru.soune.nocopy.entity.user.AuthToken;
import ru.soune.nocopy.exception.NotValidFieldException;
import ru.soune.nocopy.repository.UserRepository;
import ru.soune.nocopy.service.register.AuthService;

import java.util.Arrays;
import java.util.Map;

@Component
@RequiredArgsConstructor
public class LoginRequestHandler implements RequestHandler {

    private final UserRepository userRepository;
    private final AuthService authService;
    private final ObjectMapper objectMapper;

    @Override
    public BaseResponse handle(BaseRequest request) {
        LoginRequest loginRequest = objectMapper.convertValue(request.getMessageBody(), LoginRequest.class);

        if (!userRepository.existsByEmail(loginRequest.getEmail())) {
            LoginAnswer loginAnswer = new LoginAnswer();
            loginAnswer.setFieldErrors(Arrays.asList(Map.of("email", loginRequest.getEmail())));

            throw new NotValidFieldException("User with email not found: " + loginRequest.getEmail(),
                    new BaseResponse(request.getMsgId(), MessageCode.AUTH_EMAIL_NOT_FOUND.getCode(),
                            MessageCode.AUTH_EMAIL_NOT_FOUND.getDescription(), loginAnswer));
        }

        AuthToken authToken = authService.login(loginRequest);

        LoginAnswer loginAnswer = new LoginAnswer();
        loginAnswer.setToken(authToken.getToken());

        return new BaseResponse(request.getMsgId(), MessageCode.SUCCESS.getCode(),
                MessageCode.SUCCESS.getDescription(), loginAnswer);
    }
}