add :: get apply-user list

src/main/kotlin/com/example/boheom/domain/feed/domain/repository/ApplyRepository.kt

@@ -10,4 +10,5 @@ interface ApplyRepository : JpaRepository<Apply, UUID> {
     fun existsByUserAndFeed(user: User, feed: Feed): Boolean
     fun countByFeed(feed: Feed): Int
     fun findByUser(user: User): List<Apply>
+    fun findByFeed(feed: Feed): List<Apply>
 }

src/main/kotlin/com/example/boheom/domain/feed/presentation/FeedController.kt

@@ -5,6 +5,7 @@ import com.example.boheom.domain.feed.presentation.dto.request.UpdateFeedRequest
 import com.example.boheom.domain.feed.presentation.dto.response.FeedDetailsResponse
 import com.example.boheom.domain.feed.presentation.dto.response.FeedListResponse
 import com.example.boheom.domain.feed.presentation.dto.response.PageFeedListResponse
+import com.example.boheom.domain.feed.presentation.dto.response.QueryApplyUserListResponse
 import com.example.boheom.domain.feed.service.CreateFeedService
 import com.example.boheom.domain.feed.service.DeleteFeedService
 import com.example.boheom.domain.feed.service.FeedApplyService
@@ -16,6 +17,7 @@ import com.example.boheom.domain.feed.service.QueryPopularFeedListService
 import com.example.boheom.domain.feed.service.QueryRecentFeedService
 import com.example.boheom.domain.feed.service.SearchFeedService
 import com.example.boheom.domain.feed.service.CancelApplyService
+import com.example.boheom.domain.feed.service.QueryApplyUserListService
 import com.example.boheom.domain.feed.service.UpdateFeedService
 import org.springframework.data.domain.Pageable
 import org.springframework.data.web.PageableDefault
@@ -48,6 +50,7 @@ class FeedController(
     private val searchFeedService: SearchFeedService,
     private val queryApplyFeedService: QueryApplyFeedService,
     private val queryMyFeedService: QueryMyFeedService,
+    private val queryApplyUserListService: QueryApplyUserListService,
 ) {
     @ResponseStatus(CREATED)
     @PostMapping
@@ -113,4 +116,9 @@ class FeedController(
     fun getMyFeed(): FeedListResponse {
         return queryMyFeedService.execute()
     }
+
+    @GetMapping("/apply-user/{feed-id}")
+    fun getAppliedUserList(@PathVariable("feed-id") feedId: UUID): QueryApplyUserListResponse {
+        return queryApplyUserListService.execute(feedId)
+    }
 }

src/main/kotlin/com/example/boheom/domain/feed/presentation/dto/response/QueryApplyUserListResponse.kt

@@ -0,0 +1,7 @@
+package com.example.boheom.domain.feed.presentation.dto.response
+
+import com.example.boheom.domain.user.presentation.dto.response.UserElement
+
+data class QueryApplyUserListResponse(
+    val users: List<UserElement>
+)

src/main/kotlin/com/example/boheom/domain/feed/service/QueryApplyUserListService.kt

@@ -0,0 +1,31 @@
+package com.example.boheom.domain.feed.service
+
+import com.example.boheom.domain.feed.domain.repository.ApplyRepository
+import com.example.boheom.domain.feed.exception.IncorrectUserException
+import com.example.boheom.domain.feed.facade.FeedFacade
+import com.example.boheom.domain.feed.presentation.dto.response.QueryApplyUserListResponse
+import com.example.boheom.domain.user.presentation.dto.response.UserElement
+import com.example.boheom.domain.user.facade.UserFacade
+import org.springframework.stereotype.Service
+import org.springframework.transaction.annotation.Transactional
+import java.util.UUID
+
+@Service
+class QueryApplyUserListService(
+    private val userFacade: UserFacade,
+    private val feedFacade: FeedFacade,
+    private val applyRepository: ApplyRepository,
+) {
+    @Transactional(readOnly = true)
+    fun execute(feedId: UUID): QueryApplyUserListResponse {
+        val user = userFacade.getCurrentUser()
+        val feed = feedFacade.getByFeedId(feedId)
+        val applyUser = applyRepository.findByFeed(feed).map { it.user }
+
+        if (user != feed.user) {
+            throw IncorrectUserException
+        }
+
+        return QueryApplyUserListResponse(applyUser.map { UserElement(it.profile, it.nickname, it.accountId) })
+    }
+}

src/main/kotlin/com/example/boheom/domain/user/presentation/dto/response/UserElement.kt

@@ -0,0 +1,7 @@
+package com.example.boheom.domain.user.presentation.dto.response
+
+data class UserElement(
+    val profile: String,
+    val nickname: String,
+    val accountId: String,
+)