src/main/kotlin/roomescape/member/business/UserService.kt

@@ -0,0 +1,52 @@
+package roomescape.member.business
+
+import io.github.oshai.kotlinlogging.KLogger
+import io.github.oshai.kotlinlogging.KotlinLogging
+import org.springframework.data.repository.findByIdOrNull
+import org.springframework.stereotype.Service
+import org.springframework.transaction.annotation.Transactional
+import roomescape.common.dto.CurrentUserContext
+import roomescape.common.dto.PrincipalType
+import roomescape.common.dto.UserLoginCredentials
+import roomescape.member.exception.UserErrorCode
+import roomescape.member.exception.UserException
+import roomescape.member.infrastructure.persistence.UserEntity
+import roomescape.member.infrastructure.persistence.UserRepository
+
+private val log: KLogger = KotlinLogging.logger {}
+
+@Service
+class UserService(
+    private val userRepository: UserRepository,
+) {
+    @Transactional(readOnly = true)
+    fun findContextById(id: Long): CurrentUserContext {
+        log.info { "[UserService.findContextById] 현재 로그인된 회원 조회 시작: id=${id}" }
+        val user: UserEntity = findOrThrow(id)
+
+        return CurrentUserContext(user.id, user.name, PrincipalType.USER)
+            .also {
+                log.info { "[UserService.findContextById] 현재 로그인된 회원 조회 완료: id=${id}" }
+            }
+    }
+
+    @Transactional(readOnly = true)
+    fun findCredentialsByAccount(email: String): UserLoginCredentials {
+        log.info { "[UserService.findCredentialsByAccount] 회원 조회 시작: email=${email}" }
+
+        return userRepository.findByEmail(email)
+            ?.let {
+                log.info { "[UserService.findCredentialsByAccount] 회원 조회 완료: id=${it.id}" }
+                UserLoginCredentials(it.id, it.password)
+            }
+            ?: run {
+                log.info { "[UserService.findCredentialsByAccount] 회원 조회 실패" }
+                throw UserException(UserErrorCode.USER_NOT_FOUND)
+            }
+    }
+
+    private fun findOrThrow(id: Long): UserEntity {
+        return userRepository.findByIdOrNull(id)
+            ?: throw UserException(UserErrorCode.USER_NOT_FOUND)
+    }
+}

src/main/kotlin/roomescape/member/infrastructure/persistence/UserRepositories.kt

@@ -2,6 +2,9 @@ package roomescape.member.infrastructure.persistence
 
 import org.springframework.data.jpa.repository.JpaRepository
 
-interface UserRepository : JpaRepository<UserEntity, Long>
+interface UserRepository : JpaRepository<UserEntity, Long> {
+
+    fun findByEmail(email: String): UserEntity?
+}
 
 interface UserStatusHistoryRepository : JpaRepository<UserStatusHistoryEntity, Long>