feat : isFirstLogin 필드 추가, 첫 로그인은 ~/welcome 리다이렉트

Author: seungwookc97

src/main/java/com/back/domain/user/dto/UserDto.java

@@ -21,6 +21,7 @@ public class UserDto {
     private Double abvDegree;
     private LocalDateTime createdAt;
     private LocalDateTime updatedAt;
+    private boolean isFirstLogin;
 
     public static UserDto from(User user) {
         if (user == null) return null;
@@ -32,6 +33,7 @@ public static UserDto from(User user) {
                 .abvDegree(user.getAbvDegree())
                 .createdAt(user.getCreatedAt())
                 .updatedAt(user.getUpdatedAt())
+                .isFirstLogin(user.isFirstLogin())
                 .build();
     }
 }

src/main/java/com/back/domain/user/entity/User.java

@@ -51,6 +51,10 @@ public class User {
     @Column(nullable = false, length = 20)
     private String role = "USER";
 
+    @Builder.Default
+    @Column(nullable = false)
+    private boolean isFirstLogin = true;
+
     public boolean isAdmin() {
         return "ADMIN".equalsIgnoreCase(role);
     }

src/main/java/com/back/domain/user/service/UserAuthService.java

@@ -143,4 +143,10 @@ public void logout(HttpServletRequest request, HttpServletResponse response) {
         jwtUtil.removeAccessTokenCookie(response);
         jwtUtil.removeRefreshTokenCookie(response);
     }
+
+    @Transactional
+    public void setFirstLoginFalse(Long id) {
+        Optional<User> userOpt = userRepository.findById(id);
+        userOpt.ifPresent(user -> user.setFirstLogin(false));
+    }
 }

src/main/java/com/back/global/security/CustomAuthenticationFilter.java

@@ -125,6 +125,7 @@ private void work(HttpServletRequest request, HttpServletResponse response, Filt
                 user.getId(),
                 user.getEmail(),
                 user.getNickname(),
+                user.isFirstLogin(),
                 user.getAuthorities(),
                 Map.of() // JWT 인증에서는 빈 attributes
         );

src/main/java/com/back/global/security/CustomOAuth2LoginSuccessHandler.java

@@ -27,8 +27,17 @@ public void onAuthenticationSuccess(HttpServletRequest request, HttpServletRespo
         // Access Token과 Refresh Token 발급
         userAuthService.issueTokens(response, securityUser.getId(), securityUser.getEmail(), securityUser.getNickname());
 
-        // 프론트엔드로 리다이렉트
-        String redirectUrl = frontendUrl + "/oauth/success";
+        // 첫 로그인 여부에 따라 리다이렉트 분기
+        String redirectUrl;
+
+        if (securityUser.isFirstLogin()) {
+            // 첫 로그인이면 welcome 페이지로
+            redirectUrl = frontendUrl + "oauth/success/welcome";
+            userAuthService.setFirstLoginFalse(securityUser.getId());
+        } else {
+            // 일반 로그인이면 메인 페이지로
+            redirectUrl = frontendUrl+"oauth/success";
+        }
 
         response.sendRedirect(redirectUrl);
     }

src/main/java/com/back/global/security/CustomOAuth2UserService.java

@@ -70,6 +70,7 @@ public OAuth2User loadUser(OAuth2UserRequest userRequest) throws OAuth2Authentic
                 user.getId(),
                 userEmail,
                 user.getNickname(),
+                user.isFirstLogin(),
                 user.getAuthorities(),
                 oAuth2User.getAttributes()
         );

src/main/java/com/back/global/security/SecurityUser.java

@@ -18,20 +18,25 @@ public class SecurityUser extends User implements OAuth2User {
     @Getter
     private String email;
 
+    @Getter
+    private boolean isFirstLogin;
+
     private Map<String, Object> attributes;
 
     // OAuth2 전용 생성자 (패스워드 없음)
     public SecurityUser(
             long id,
             String email,
             String nickname,
+            boolean isFirstLogin,
             Collection<? extends GrantedAuthority> authorities,
             Map<String, Object> attributes
     ) {
         super(email, "", authorities); // OAuth2에서는 빈 패스워드
         this.id = id;
         this.nickname = nickname;
         this.email = email;
+        this.isFirstLogin = isFirstLogin;
         this.attributes = attributes;
     }