[#2]✨Feat: 리프레시 토큰 삭제 및 추가 코드 작성

src/main/java/univ/yesummit/global/auth/util/JwtUtils.java

@@ -2,8 +2,12 @@
 
 import com.auth0.jwt.JWT;
 import com.auth0.jwt.algorithms.Algorithm;
+import com.auth0.jwt.interfaces.DecodedJWT;
+import io.jsonwebtoken.Claims;
+import io.jsonwebtoken.Jwts;
 import jakarta.servlet.http.HttpServletRequest;
 import jakarta.servlet.http.HttpServletResponse;
+import jakarta.transaction.Transactional;
 import lombok.Getter;
 import lombok.RequiredArgsConstructor;
 import lombok.extern.slf4j.Slf4j;
@@ -12,6 +16,8 @@
 import univ.yesummit.domain.member.repository.MemberRepository;
 
 import java.util.Date;
+import java.util.HashMap;
+import java.util.Map;
 import java.util.Optional;
 
 @Getter
@@ -91,6 +97,58 @@ public Optional<Long> extractMemberId(String token) {
 
         return Optional.ofNullable(memberId);
     }
+
+//    public Map<String, Object> getClaims(String token) {
+//        try {
+//            DecodedJWT decodedJWT = JWT.require(Algorithm.HMAC512(secret)) // 동일한 키와 알고리즘 사용
+//                    .build()
+//                    .verify(token); // 토큰 검증
+//
+//            // 클레임 반환
+//            Map<String, Object> claims = new HashMap<>();
+//            claims.put("subject", decodedJWT.getSubject());
+//            claims.put("member_id", decodedJWT.getClaim(ID_CLAIM).asLong());
+//            claims.put("expiresAt", decodedJWT.getExpiresAt());
+//
+//            return claims;
+//        } catch (Exception e) {
+//            log.error("Invalid token: {}", e.getMessage());
+//            throw new IllegalArgumentException("Invalid token", e);
+//        }
+//    }
+
+    //== 추후에 유지보수하는 과정에서 리프레시 토큰의 만료 혹은 토큰의 블랙리스트를 구현할 때 사용할 것 ==//
+
+//
+//    public void destroyRefreshToken(String username) {
+//        memberRepository.findByUsername(username)
+//                .ifPresentOrElse(
+//                        Member::destroyRefreshToken,
+//                        () -> { throw new MemberException(ErrorCode.NOT_FOUND_MEMBER); }
+//                );
+//    }
+//
+//    public void updateRefreshToken(String username, String refreshToken) {
+//        memberRepository.findByUsername(username)
+//                .ifPresentOrElse(
+//                        member -> member.updateRefreshToken(refreshToken),
+//                        () -> { throw new MemberException(ErrorCode.NOT_FOUND_MEMBER); }
+//                );
+//    }
+
+    public Optional<String> extractRefreshToken(HttpServletRequest request) {
+        return Optional.ofNullable(request.getHeader(refreshHeader))
+                .filter(refreshToken -> refreshToken.startsWith(BEARER))
+                .map(refreshToken -> refreshToken.replace(BEARER, ""));
+    }
+
+    public void sendAccessToken(HttpServletResponse response, String accessToken) {
+        response.setStatus(HttpServletResponse.SC_OK);
+
+        response.setHeader(accessHeader, accessToken);
+        log.info("Send AccessToken: {}", accessToken);
+    }
+
     /* 토큰 유효성 검증 */
     public boolean isValid(String token) {
         try {