src/main/kotlin/roomescape/admin/business/AdminService.kt

@@ -0,0 +1,58 @@
+package roomescape.admin.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.admin.exception.AdminErrorCode
+import roomescape.admin.exception.AdminException
+import roomescape.admin.infrastructure.persistence.AdminEntity
+import roomescape.admin.infrastructure.persistence.AdminRepository
+import roomescape.common.dto.AdminLoginCredentials
+import roomescape.common.dto.CurrentUserContext
+import roomescape.common.dto.PrincipalType
+
+private val log: KLogger = KotlinLogging.logger {}
+
+@Service
+class AdminService(
+    private val adminRepository: AdminRepository,
+) {
+    @Transactional(readOnly = true)
+    fun findContextById(id: Long): CurrentUserContext {
+        log.info { "[AdminService.findById] 현재 로그인된 관리자 조회 시작: id=${id}" }
+
+        val admin: AdminEntity = findOrThrow(id)
+
+        return CurrentUserContext(admin.id, admin.name, PrincipalType.ADMIN).also {
+            log.info { "[AdminService.findById] 현재 로그인된 관리자 조회 완료: id=${id}" }
+        }
+    }
+
+    @Transactional(readOnly = true)
+    fun findCredentialsByAccount(account: String): AdminLoginCredentials {
+        log.info { "[AdminService.findInfoByAccount] 관리자 조회 시작: account=${account}" }
+
+        return adminRepository.findByAccount(account)
+            ?.let {
+                log.info { "[AdminService.findByAccount] 관리자 조회 완료: id=${it.id}" }
+                AdminLoginCredentials(it.id, it.password, it.permissionLevel)
+            }
+            ?: run {
+                log.info { "[AdminService.findInfoByAccount] 관리자 조회 실패" }
+                throw AdminException(AdminErrorCode.ADMIN_NOT_FOUND)
+            }
+    }
+
+    private fun findOrThrow(id: Long): AdminEntity {
+        log.info { "[AdminService.findOrThrow] 조회 시작: id=${id}" }
+
+        return adminRepository.findByIdOrNull(id)
+            ?.also { log.info { "[AdminService.findOrThrow] 조회 완료: id=${id}, name=${it.name}" } }
+            ?: run {
+                log.info { "[AdminService.findOrThrow] 조회 실패: id=${id}" }
+                throw AdminException(AdminErrorCode.ADMIN_NOT_FOUND)
+            }
+    }
+}

src/main/kotlin/roomescape/admin/exception/AdminException.kt

@@ -13,4 +13,6 @@ enum class AdminErrorCode(
     override val httpStatus: HttpStatus,
     override val errorCode: String,
     override val message: String
-) : ErrorCode
+) : ErrorCode {
+    ADMIN_NOT_FOUND(HttpStatus.NOT_FOUND, "A001", "관리자를 찾을 수 없어요."),
+}

src/main/kotlin/roomescape/admin/infrastructure/persistence/AdminRepository.kt

@@ -2,4 +2,6 @@ package roomescape.admin.infrastructure.persistence
 
 import org.springframework.data.jpa.repository.JpaRepository
 
-interface AdminRepository : JpaRepository<AdminEntity, Long>
+interface AdminRepository : JpaRepository<AdminEntity, Long> {
+    fun findByAccount(account: String): AdminEntity?
+}