feat: LoginService와 로그인 성공, 실패 핸들러 추가 (#4)

src/main/java/com/project/mapdagu/domain/auth/handler/LoginFailureHandler.java

@@ -0,0 +1,23 @@
+package com.project.mapdagu.domain.auth.handler;
+
+import jakarta.servlet.http.HttpServletRequest;
+import jakarta.servlet.http.HttpServletResponse;
+import lombok.extern.slf4j.Slf4j;
+import org.springframework.security.core.AuthenticationException;
+import org.springframework.security.web.authentication.SimpleUrlAuthenticationFailureHandler;
+
+import java.io.IOException;
+
+@Slf4j
+public class LoginFailureHandler extends SimpleUrlAuthenticationFailureHandler {
+
+    @Override
+    public void onAuthenticationFailure(HttpServletRequest request, HttpServletResponse response,
+                                        AuthenticationException exception) throws IOException {
+        response.setStatus(HttpServletResponse.SC_BAD_REQUEST);
+        response.setCharacterEncoding("UTF-8");
+        response.setContentType("text/plain;charset=UTF-8");
+        response.getWriter().write("로그인 실패! 이메일이나 비밀번호를 확인해주세요.");
+        log.info("로그인에 실패했습니다. 메시지 : {}", exception.getMessage());
+    }
+}

src/main/java/com/project/mapdagu/domain/auth/handler/LoginSuccessHandler.java

@@ -0,0 +1,43 @@
+package com.project.mapdagu.domain.auth.handler;
+
+import com.project.mapdagu.domain.member.repository.MemberRepository;
+import com.project.mapdagu.jwt.service.JwtService;
+import jakarta.servlet.http.HttpServletRequest;
+import jakarta.servlet.http.HttpServletResponse;
+import lombok.RequiredArgsConstructor;
+import lombok.extern.slf4j.Slf4j;
+import org.springframework.beans.factory.annotation.Value;
+import org.springframework.security.core.Authentication;
+import org.springframework.security.core.userdetails.UserDetails;
+import org.springframework.security.web.authentication.SimpleUrlAuthenticationSuccessHandler;
+
+@Slf4j
+@RequiredArgsConstructor
+public class LoginSuccessHandler extends SimpleUrlAuthenticationSuccessHandler {
+
+    private final JwtService jwtService;
+    private final MemberRepository memberRepository;
+
+    @Value("${jwt.access.expiration}")
+    private String accessTokenExpiration;
+
+    @Override
+    public void onAuthenticationSuccess(HttpServletRequest request, HttpServletResponse response,
+                                        Authentication authentication) {
+        String email = extractUsername(authentication);
+        String accessToken = jwtService.createAccessToken(email);
+        String refreshToken = jwtService.createRefreshToken(email);
+
+        jwtService.sendAccessAndRefreshToken(response, accessToken, refreshToken);
+        jwtService.updateRefreshToken(email, refreshToken);
+        log.info("로그인에 성공하였습니다. 이메일 : {}", email);
+
+        log.info("로그인에 성공하였습니다. AccessToken : {}", accessToken);
+        log.info("발급된 AccessToken 만료 기간 : {}", accessTokenExpiration);
+    }
+
+    private String extractUsername(Authentication authentication) {
+        UserDetails userDetails = (UserDetails) authentication.getPrincipal();
+        return userDetails.getUsername();
+    }
+}

src/main/java/com/project/mapdagu/domain/auth/service/LoginService.java

@@ -0,0 +1,31 @@
+package com.project.mapdagu.domain.auth.service;
+
+import com.project.mapdagu.domain.member.entity.Member;
+import com.project.mapdagu.domain.member.repository.MemberRepository;
+import com.project.mapdagu.error.ErrorCode;
+import com.project.mapdagu.error.exception.custom.BusinessException;
+import lombok.RequiredArgsConstructor;
+import org.springframework.security.core.userdetails.UserDetails;
+import org.springframework.security.core.userdetails.UserDetailsService;
+import org.springframework.security.core.userdetails.UsernameNotFoundException;
+import org.springframework.stereotype.Service;
+
+import static com.project.mapdagu.error.ErrorCode.*;
+
+@Service
+@RequiredArgsConstructor
+public class LoginService implements UserDetailsService {
+
+    private final MemberRepository memberRepository;
+
+    @Override
+    public UserDetails loadUserByUsername(String email) throws UsernameNotFoundException {
+        Member member = memberRepository.findByEmail(email).orElseThrow(() -> new BusinessException(MEMBER_NOT_FOUND));
+
+        return org.springframework.security.core.userdetails.User.builder()
+                .username(member.getEmail())
+                .password(member.getPassword())
+                .roles(member.getRole().name())
+                .build();
+    }
+}