refactor: 액세스 토큰 JWT 클레임에 homeUniversityId를 추가

src/main/java/com/example/solidconnection/auth/service/AuthTokenProvider.java

@@ -10,6 +10,7 @@
 import com.example.solidconnection.siteuser.domain.Role;
 import com.example.solidconnection.siteuser.domain.SiteUser;
 import com.example.solidconnection.siteuser.repository.SiteUserRepository;
+import java.util.HashMap;
 import java.util.Map;
 import java.util.Objects;
 import lombok.RequiredArgsConstructor;
@@ -20,6 +21,7 @@
 public class AuthTokenProvider {
 
     private static final String ROLE_CLAIM_KEY = "role";
+    private static final String HOME_UNIVERSITY_CLAIM_KEY = "home_university";
 
     private final TokenProvider tokenProvider;
     private final TokenStorage tokenStorage;
@@ -29,9 +31,14 @@ public class AuthTokenProvider {
     public AccessToken generateAccessToken(SiteUser siteUser) {
         Subject subject = toSubject(siteUser);
         Role role = siteUser.getRole();
+        Map<String, String> claims = new HashMap<>(Map.of(ROLE_CLAIM_KEY, role.name()));
+        if (siteUser.getHomeUniversityId() != null) {
+            claims.put(HOME_UNIVERSITY_CLAIM_KEY, String.valueOf(siteUser.getHomeUniversityId()));
+        }
+
         String token = tokenProvider.generateToken(
                 subject,
-                Map.of(ROLE_CLAIM_KEY, role.name()),
+                claims,
                 tokenProperties.access().expireTime()
         );
         return new AccessToken(token);
@@ -71,6 +78,11 @@ public SiteUser parseSiteUser(String token) {
                 .orElseThrow(() -> new CustomException(USER_NOT_FOUND));
     }
 
+    public Long parseHomeUniversityId(String token) {
+        String value = tokenProvider.parseClaims(token, HOME_UNIVERSITY_CLAIM_KEY, String.class);
+        return value != null ? Long.parseLong(value) : null;
+    }
+
     public Subject toSubject(SiteUser siteUser) {
         return new Subject(siteUser.getId().toString());
     }

src/test/java/com/example/solidconnection/auth/service/AuthTokenProviderTest.java

@@ -10,6 +10,7 @@
 import com.example.solidconnection.siteuser.domain.SiteUser;
 import com.example.solidconnection.siteuser.fixture.SiteUserFixture;
 import com.example.solidconnection.support.TestContainerSpringBootTest;
+import com.example.solidconnection.university.fixture.HomeUniversityFixture;
 import java.util.Optional;
 import org.junit.jupiter.api.BeforeEach;
 import org.junit.jupiter.api.DisplayName;
@@ -33,12 +34,19 @@ class AuthTokenProviderTest {
     @Autowired
     private SiteUserFixture siteUserFixture;
 
+    @Autowired
+    private HomeUniversityFixture homeUniversityFixture;
+
     private SiteUser siteUser;
+    private SiteUser siteUserWithHomeUniversity;
+    private Long homeUniversityId;
     private Subject expectedSubject;
 
     @BeforeEach
     void setUp() {
+        homeUniversityId = homeUniversityFixture.인하대학교().getId();
         siteUser = siteUserFixture.사용자();
+        siteUserWithHomeUniversity = siteUserFixture.국내_대학_정보_소지_사용자(homeUniversityId);
         expectedSubject = new Subject(siteUser.getId().toString());
     }
 
@@ -70,6 +78,30 @@ void setUp() {
         assertThat(actualSitUser.getId()).isEqualTo(siteUser.getId());
     }
 
+    @Nested
+    class 액세스_토큰_homeUniversityId_클레임 {
+
+        @Test
+        void homeUniversityId가_있는_사용자는_액세스_토큰_클레임에_포함된다() {
+            // when
+            String token = authTokenProvider.generateAccessToken(siteUserWithHomeUniversity).token();
+
+            // then
+            Long actual = authTokenProvider.parseHomeUniversityId(token);
+            assertThat(actual).isEqualTo(homeUniversityId);
+        }
+
+        @Test
+        void homeUniversityId가_없는_사용자는_액세스_토큰_클레임에서_생략된다() {
+            // when
+            String token = authTokenProvider.generateAccessToken(siteUser).token();
+
+            // then
+            Long actual = authTokenProvider.parseHomeUniversityId(token);
+            assertThat(actual).isNull();
+        }
+    }
+
     @Nested
     class 리프레시_토큰을_제공한다 {
 

src/test/java/com/example/solidconnection/siteuser/fixture/SiteUserFixture.java

@@ -61,6 +61,19 @@ public class SiteUserFixture {
                 .create();
     }
 
+    public SiteUser 국내_대학_정보_소지_사용자(Long homeUniversityId) {
+        return siteUserFixtureBuilder.siteUser()
+                .email("university@example.com")
+                .authType(AuthType.EMAIL)
+                .nickname("국내대학사용자")
+                .homeUniversityId(homeUniversityId)
+                .profileImageUrl("profileImageUrl")
+                .role(Role.MENTEE)
+                .password("password123")
+                .userStatus(UserStatus.ACTIVE)
+                .create();
+    }
+
     public SiteUser 멘토(int index, String nickname) {
         return siteUserFixtureBuilder.siteUser()
                 .email("mentor" + index + "@example.com")