refactor : (#31) logout service

Author: qkrwndnjs1075

src/main/kotlin/entry/dsm/gitauth/equusgithubauth/domain/auth/service/LogoutService.kt

@@ -0,0 +1,36 @@
+package entry.dsm.gitauth.equusgithubauth.domain.auth.service
+
+import entry.dsm.gitauth.equusgithubauth.domain.auth.exception.InvalidAccessTokenException
+import entry.dsm.gitauth.equusgithubauth.domain.user.entity.repository.RefreshTokenRepository
+import entry.dsm.gitauth.equusgithubauth.global.security.jwt.JwtTokenProvider
+import org.springframework.stereotype.Service
+import org.springframework.transaction.annotation.Transactional
+import org.springframework.data.redis.core.RedisTemplate
+import java.util.concurrent.TimeUnit
+
+@Service
+class LogoutService(
+    private val jwtTokenProvider: JwtTokenProvider,
+    private val redisTemplate: RedisTemplate<String, String>,
+    private val refreshTokenRepository: RefreshTokenRepository
+) {
+
+    @Transactional
+    fun logout(accessToken: String) {
+        if (!jwtTokenProvider.valid(accessToken)) {
+            throw InvalidAccessTokenException
+        }
+
+        val userName = jwtTokenProvider.getSubjectFromToken(accessToken)
+
+        refreshTokenRepository.findByLoginId(userName)?.let {
+            refreshTokenRepository.delete(it)
+        }
+
+        val expiration = jwtTokenProvider.getExpiration(accessToken)
+        if (expiration > 0) {
+            redisTemplate.opsForValue().set("blacklist:$accessToken", "logout", expiration, TimeUnit.MILLISECONDS)
+        }
+    }
+}
+