add project

src/main/kotlin/me/wypark/blogbackend/domain/auth/RefreshTokenRepository.kt

@@ -0,0 +1,33 @@
+package me.wypark.blogbackend.domain.auth
+
+import org.springframework.beans.factory.annotation.Value
+import org.springframework.data.redis.core.RedisTemplate
+import org.springframework.stereotype.Repository
+import java.util.concurrent.TimeUnit
+
+@Repository
+class RefreshTokenRepository(
+    private val redisTemplate: RedisTemplate<String, String>,
+    @Value("\${jwt.refresh-token-validity}") private val refreshTokenValidity: Long
+) {
+    // 저장 (Key: Email, Value: RefreshToken)
+    // RTR 핵심: 사용자가 로그인을 새로 하거나 토큰을 재발급 받을 때마다 덮어씌움
+    fun save(email: String, refreshToken: String) {
+        redisTemplate.opsForValue().set(
+            "RT:$email",
+            refreshToken,
+            refreshTokenValidity,
+            TimeUnit.MILLISECONDS
+        )
+    }
+
+    // 조회
+    fun findByEmail(email: String): String? {
+        return redisTemplate.opsForValue().get("RT:$email")
+    }
+
+    // 삭제 (로그아웃 시)
+    fun delete(email: String) {
+        redisTemplate.delete("RT:$email")
+    }
+}