feat: Notification 읽기 기능 추가

src/main/kotlin/com/depromeet/makers/domain/gateway/NotificationGateway.kt

@@ -3,6 +3,7 @@ package com.depromeet.makers.domain.gateway
 import com.depromeet.makers.domain.model.Notification
 
 interface NotificationGateway {
+    fun getById(notificationId: String): Notification
     fun save(notification: Notification): Notification
     fun findRecentNotificationByMemberId(memberId: String): Notification?
 }

src/main/kotlin/com/depromeet/makers/domain/usecase/UpdateReadNotification.kt

@@ -0,0 +1,26 @@
+package com.depromeet.makers.domain.usecase
+
+import com.depromeet.makers.domain.gateway.NotificationGateway
+import com.depromeet.makers.domain.model.Notification
+import java.time.LocalDateTime
+
+class UpdateReadNotification(
+    private val notificationGateway: NotificationGateway,
+) : UseCase<UpdateReadNotification.UpdateReadNotificationInput, Notification> {
+
+    data class UpdateReadNotificationInput(
+        val notificationId: String,
+        val memberId: String,
+        val now: LocalDateTime = LocalDateTime.now(),
+    )
+
+    override fun execute(input: UpdateReadNotificationInput): Notification {
+        val notification = notificationGateway.getById(input.notificationId)
+
+        return notificationGateway.save(
+            notification.copy(
+                readAt = input.now
+            )
+        )
+    }
+}

src/main/kotlin/com/depromeet/makers/presentation/restapi/controller/NotificationController.kt

@@ -1,19 +1,24 @@
 package com.depromeet.makers.presentation.restapi.controller
 
 import com.depromeet.makers.domain.usecase.GetRecentNotification
+import com.depromeet.makers.domain.usecase.UpdateReadNotification
 import com.depromeet.makers.presentation.restapi.dto.response.NotificationResponse
 import io.swagger.v3.oas.annotations.Operation
 import io.swagger.v3.oas.annotations.tags.Tag
 import org.springframework.security.core.Authentication
 import org.springframework.web.bind.annotation.GetMapping
+import org.springframework.web.bind.annotation.PathVariable
+import org.springframework.web.bind.annotation.PostMapping
 import org.springframework.web.bind.annotation.RequestMapping
 import org.springframework.web.bind.annotation.RestController
+import java.time.LocalDateTime
 
 @Tag(name = "알림 API", description = "알림 관련 API")
 @RestController
 @RequestMapping("/v1/notifications")
 class NotificationController(
     private val getRecentNotification: GetRecentNotification,
+    private val updateReadNotification: UpdateReadNotification,
 ) {
     @Operation(summary = "최근 알림 조회", description = "로그인한 사용자의 최근 알림을 조회합니다.")
     @GetMapping
@@ -28,4 +33,21 @@ class NotificationController(
             )
         )
     }
+
+    @Operation(summary = "알림을 읽음 처리합니다.", description = "알림을 읽음 처리합니다.")
+    @PostMapping("/{notificationId}/read")
+    fun readNotification(
+        authentication: Authentication,
+        @PathVariable notificationId: String,
+    ): NotificationResponse {
+        return NotificationResponse.fromDomain(
+            updateReadNotification.execute(
+                UpdateReadNotification.UpdateReadNotificationInput(
+                    memberId = authentication.name,
+                    notificationId = notificationId,
+                    now = LocalDateTime.now(),
+                )
+            )
+        )
+    }
 }

src/main/kotlin/com/depromeet/makers/presentation/restapi/dto/response/NotificationResponse.kt

@@ -1,5 +1,6 @@
 package com.depromeet.makers.presentation.restapi.dto.response
 
+import com.depromeet.makers.domain.model.Notification
 import com.depromeet.makers.domain.model.NotificationType
 import com.depromeet.makers.domain.usecase.GetRecentNotification
 import io.swagger.v3.oas.annotations.media.Schema
@@ -30,5 +31,15 @@ data class NotificationResponse(
             type = output.type,
             isRead = output.isRead,
         )
+
+        fun fromDomain(output: Notification): NotificationResponse {
+            return NotificationResponse(
+                id = output.id,
+                memberId = output.memberId,
+                content = output.content,
+                type = output.type,
+                isRead = output.readAt != null,
+            )
+        }
     }
 }