feat: 관리자 / 회원 구분없는 '로그인 상태' 확인 API와 로그인 여부와 상관없이 사용 가능한 API에 사용할 새로운 Interceptor 및 어노테이션 추가

src/main/kotlin/roomescape/auth/web/support/AuthAnnotations.kt

@@ -23,3 +23,11 @@ annotation class AdminOnly(
 @Target(AnnotationTarget.FUNCTION)
 @Retention(AnnotationRetention.RUNTIME)
 annotation class UserOnly
+
+@Target(AnnotationTarget.FUNCTION)
+@Retention(AnnotationRetention.RUNTIME)
+annotation class Authenticated
+
+@Target(AnnotationTarget.FUNCTION)
+@Retention(AnnotationRetention.RUNTIME)
+annotation class Public

src/main/kotlin/roomescape/auth/web/support/interceptors/AuthenticatedInterceptor.kt

@@ -0,0 +1,50 @@
+package roomescape.auth.web.support.interceptors
+
+import io.github.oshai.kotlinlogging.KLogger
+import io.github.oshai.kotlinlogging.KotlinLogging
+import jakarta.servlet.http.HttpServletRequest
+import jakarta.servlet.http.HttpServletResponse
+import org.slf4j.MDC
+import org.springframework.stereotype.Component
+import org.springframework.web.method.HandlerMethod
+import org.springframework.web.servlet.HandlerInterceptor
+import roomescape.auth.business.AuthServiceV2
+import roomescape.auth.business.CLAIM_TYPE_KEY
+import roomescape.auth.infrastructure.jwt.JwtUtils
+import roomescape.auth.web.support.Authenticated
+import roomescape.auth.web.support.MDC_MEMBER_ID_KEY
+import roomescape.auth.web.support.accessToken
+import roomescape.common.dto.PrincipalType
+
+private val log: KLogger = KotlinLogging.logger {}
+
+@Component
+class AuthenticatedInterceptor(
+    private val jwtUtils: JwtUtils,
+    private val authService: AuthServiceV2
+) : HandlerInterceptor {
+
+    override fun preHandle(
+        request: HttpServletRequest,
+        response: HttpServletResponse,
+        handler: Any
+    ): Boolean {
+        if ((handler !is HandlerMethod) || (handler.getMethodAnnotation(Authenticated::class.java) == null)) {
+            return true
+        }
+
+        val token: String? = request.accessToken()
+
+        val id = jwtUtils.extractSubject(token).also { MDC.put(MDC_MEMBER_ID_KEY, it) }
+        val type = jwtUtils.extractClaim(token, CLAIM_TYPE_KEY)
+
+        try {
+            authService.findContextById(id.toLong(), PrincipalType.valueOf(type))
+            log.info { "[AuthenticatedInterceptor] 인증 완료. id=$id, type=${type}" }
+
+            return true
+        } catch (e: Exception) {
+            throw e
+        }
+    }
+}