feat: 크루 참여 요청 수락 및 거절 기능 추가

src/main/java/com/retrip/crew/application/in/CrewService.java

@@ -1,26 +1,37 @@
 package com.retrip.crew.application.in;
 
-import com.retrip.crew.application.in.request.CreateDemandRequest;
-import com.retrip.crew.application.in.request.CrewCreateRequest;
-import com.retrip.crew.application.in.request.CrewOrder;
-import com.retrip.crew.application.in.request.CrewUpdateRequest;
-import com.retrip.crew.application.in.response.*;
+import com.retrip.crew.application.in.request.crew.CrewCreateRequest;
+import com.retrip.crew.application.in.request.crew.CrewOrder;
+import com.retrip.crew.application.in.request.crew.CrewUpdateRequest;
+import com.retrip.crew.application.in.request.demand.CreateDemandRequest;
+import com.retrip.crew.application.in.request.demand.DemandOrder;
+import com.retrip.crew.application.in.response.crew.CrewCreateResponse;
+import com.retrip.crew.application.in.response.crew.CrewDetailResponse;
+import com.retrip.crew.application.in.response.crew.CrewListResponse;
+import com.retrip.crew.application.in.response.crew.CrewUpdateResponse;
+import com.retrip.crew.application.in.response.demand.*;
 import com.retrip.crew.application.in.usecase.GetCrewUseCase;
 import com.retrip.crew.application.in.usecase.ManageCrewUseCase;
 import com.retrip.crew.application.in.usecase.ManageDemandUseCase;
 import com.retrip.crew.application.in.usecase.UpdateRecruitmentUseCase;
+import com.retrip.crew.application.out.repository.CrewDemandRepository;
 import com.retrip.crew.application.out.repository.CrewMemberRepository;
 import com.retrip.crew.application.out.repository.CrewQueryRepository;
 import com.retrip.crew.application.out.repository.CrewRepository;
 import com.retrip.crew.domain.entity.Crew;
 import com.retrip.crew.domain.entity.Demand;
 import com.retrip.crew.domain.entity.Recruitment;
 import com.retrip.crew.domain.exception.CrewNotFoundException;
+import com.retrip.crew.domain.exception.NotCrewLeaderException;
+import com.retrip.crew.domain.exception.common.BusinessException;
+import com.retrip.crew.domain.exception.common.EntityNotFoundException;
 import com.retrip.crew.domain.vo.CrewDescription;
 import com.retrip.crew.domain.vo.CrewTitle;
+import com.retrip.crew.domain.vo.DemandStatus;
 import com.retrip.crew.infra.adapter.in.presentation.rest.common.ScrollPageResponse;
 import com.retrip.crew.infra.util.PaginationUtils;
 import lombok.RequiredArgsConstructor;
+import org.springframework.data.domain.Page;
 import org.springframework.data.domain.Pageable;
 import org.springframework.data.domain.Slice;
 import org.springframework.stereotype.Service;
@@ -35,6 +46,7 @@ public class CrewService implements ManageCrewUseCase, UpdateRecruitmentUseCase,
     private final CrewRepository crewRepository;
     private final CrewMemberRepository crewMemberRepository;
     private final CrewQueryRepository crewQueryRepository;
+    private final CrewDemandRepository demandRepository;
 
     @Override
     public CrewCreateResponse createCrew(CrewCreateRequest request) {
@@ -75,6 +87,59 @@ public CreateDemandResponse createDemand(UUID crewId, CreateDemandRequest reques
         return CreateDemandResponse.of(crew.getId(), demand);
     }
 
+    @Override
+    public Page<DemandsResponse> getDemands(
+            UUID crewId, UUID memberId, String status, Pageable pageable, DemandOrder order, String sort) {
+        Crew crew = findById(crewId);
+        throwIfNotLeader(crew, memberId, new NotCrewLeaderException());
+        Page<Demand> demands = demandRepository.findByCrewIdAndStatus(
+                crewId, DemandStatus.valueOf(status), PaginationUtils.createPageRequest(pageable, order.getField(), sort));
+        return demands.map(d -> DemandsResponse.of(crewId, d));
+    }
+
+    @Override
+    public Page<CrewsOfDemandResponse> getCrewsOfDemand(
+            UUID crewId, UUID demandId, UUID memberId, Pageable pageable, CrewOrder order, String sort) {
+        Crew crew = findById(crewId);
+        throwIfNotLeader(crew, memberId, new NotCrewLeaderException());
+        Demand demand = findDemandByIdAndCrewId(demandId, crewId);
+        return crewQueryRepository.findAllContainsMember(pageable, demand.getMemberId());
+    }
+
+    private static void throwIfNotLeader(Crew crew, UUID memberId, BusinessException exception) {
+        if (!crew.getCrewMembers().isLeader(memberId)) {
+            throw exception;
+        }
+    }
+
+    @Override
+    public void cancelDemand(UUID crewId, UUID demandId, UUID memberId) {
+        Demand demand = findDemandByIdAndCrewId(demandId, crewId);
+        Crew crew = demand.getCrew();
+        crew.cancelDemand(demand);
+    }
+
+    @Override
+    public RejectDemandResponse rejectDemand(UUID crewId, UUID demandId, UUID memberId) {
+        Demand demand = findDemandByIdAndCrewId(demandId, crewId);
+        Crew crew = demand.getCrew();
+        crew.rejectDemand(demand);
+        return RejectDemandResponse.of(demand);
+    }
+
+    @Override
+    public ApproveDemandResponse approveDemand(UUID crewId, UUID demandId, UUID memberId) {
+        Demand demand = findDemandByIdAndCrewId(demandId, crewId);
+        Crew crew = demand.getCrew();
+        crew.approveDemand(demand);
+        return ApproveDemandResponse.of(demand);
+    }
+
+    private Demand findDemandByIdAndCrewId(UUID demandId, UUID crewId) {
+        return demandRepository.findCrewByIdAndCrewId(demandId, crewId)
+                .orElseThrow(() -> new EntityNotFoundException("참여 요청 엔티티를 찾을 수 없습니다."));
+    }
+
     @Override
     @Transactional(readOnly = true)
     public ScrollPageResponse<CrewListResponse> getCrews(Pageable pageable, String keyword, CrewOrder order, String sort) {

src/main/java/com/retrip/crew/application/in/request/CrewCreateRequest.java → src/main/java/com/retrip/crew/application/in/request/crew/CrewCreateRequest.java

@@ -1,4 +1,4 @@
-package com.retrip.crew.application.in.request;
+package com.retrip.crew.application.in.request.crew;
 
 import com.retrip.crew.domain.entity.Crew;
 import io.swagger.v3.oas.annotations.media.Schema;

src/main/java/com/retrip/crew/application/in/request/CrewOrder.java → src/main/java/com/retrip/crew/application/in/request/crew/CrewOrder.java

@@ -1,4 +1,4 @@
-package com.retrip.crew.application.in.request;
+package com.retrip.crew.application.in.request.crew;
 
 import lombok.Getter;
 import lombok.RequiredArgsConstructor;

src/main/java/com/retrip/crew/application/in/request/CrewUpdateRequest.java → src/main/java/com/retrip/crew/application/in/request/crew/CrewUpdateRequest.java

@@ -1,4 +1,4 @@
-package com.retrip.crew.application.in.request;
+package com.retrip.crew.application.in.request.crew;
 
 import io.swagger.v3.oas.annotations.media.Schema;
 import jakarta.validation.constraints.Size;

src/main/java/com/retrip/crew/application/in/request/demand/CreateDemandRequest.java

@@ -0,0 +1,11 @@
+package com.retrip.crew.application.in.request.demand;
+
+import io.swagger.v3.oas.annotations.media.Schema;
+
+import java.util.UUID;
+
+@Schema(description = "크루 참여 요청 생성 Request")
+public record CreateDemandRequest(
+        UUID memberId
+) {
+}

src/main/java/com/retrip/crew/application/in/request/demand/DemandOrder.java

@@ -0,0 +1,12 @@
+package com.retrip.crew.application.in.request.demand;
+
+import lombok.Getter;
+import lombok.RequiredArgsConstructor;
+
+@Getter
+@RequiredArgsConstructor
+public enum DemandOrder {
+    DATE("createdAt");
+
+    private final String field;
+}

src/main/java/com/retrip/crew/application/in/response/CrewCreateResponse.java → src/main/java/com/retrip/crew/application/in/response/crew/CrewCreateResponse.java

@@ -1,4 +1,4 @@
-package com.retrip.crew.application.in.response;
+package com.retrip.crew.application.in.response.crew;
 
 import com.retrip.crew.domain.entity.Crew;
 import com.retrip.crew.domain.vo.RecruitmentStatus;

src/main/java/com/retrip/crew/application/in/response/CrewDetailResponse.java → src/main/java/com/retrip/crew/application/in/response/crew/CrewDetailResponse.java

@@ -1,4 +1,4 @@
-package com.retrip.crew.application.in.response;
+package com.retrip.crew.application.in.response.crew;
 
 import com.retrip.crew.domain.entity.Crew;
 import com.retrip.crew.domain.entity.CrewMember;

src/main/java/com/retrip/crew/application/in/response/CrewListResponse.java → src/main/java/com/retrip/crew/application/in/response/crew/CrewListResponse.java

@@ -1,4 +1,4 @@
-package com.retrip.crew.application.in.response;
+package com.retrip.crew.application.in.response.crew;
 
 import io.swagger.v3.oas.annotations.media.Schema;
 import java.util.UUID;

src/main/java/com/retrip/crew/application/in/response/CrewUpdateResponse.java → src/main/java/com/retrip/crew/application/in/response/crew/CrewUpdateResponse.java

@@ -1,11 +1,12 @@
-package com.retrip.crew.application.in.response;
+package com.retrip.crew.application.in.response.crew;
 
 import com.retrip.crew.domain.entity.Crew;
 import com.retrip.crew.domain.vo.RecruitmentStatus;
 import io.swagger.v3.oas.annotations.media.Schema;
 
 import java.util.UUID;
 
+@Schema(description = "크루 정보 변경 Response")
 public record CrewUpdateResponse(
         @Schema(description = "크루 ID")
         UUID id,

src/main/java/com/retrip/crew/application/in/response/demand/ApproveDemandResponse.java

@@ -0,0 +1,26 @@
+package com.retrip.crew.application.in.response.demand;
+
+import com.retrip.crew.domain.entity.Demand;
+import com.retrip.crew.domain.vo.DemandStatus;
+import io.swagger.v3.oas.annotations.media.Schema;
+
+import java.util.UUID;
+
+@Schema(description = "크루 참여 요청 승인 Response")
+public record ApproveDemandResponse(
+        @Schema(description = "크루 ID")
+        UUID crewId,
+
+        @Schema(description = "참여 요청 ID")
+        UUID demandId,
+
+        @Schema(description = "참여 요청자 ID")
+        UUID memberId,
+
+        @Schema(description = "참여 요청 상태")
+        DemandStatus status
+) {
+    public static ApproveDemandResponse of(Demand demand) {
+        return new ApproveDemandResponse(demand.getCrew().getId(), demand.getId(), demand.getMemberId(), demand.getStatus());
+    }
+}

src/main/java/com/retrip/crew/application/in/response/ChangeRecruitmentStatusResponse.java → src/main/java/com/retrip/crew/application/in/response/demand/ChangeRecruitmentStatusResponse.java

@@ -1,11 +1,12 @@
-package com.retrip.crew.application.in.response;
+package com.retrip.crew.application.in.response.demand;
 
 import com.retrip.crew.domain.entity.Crew;
 import com.retrip.crew.domain.vo.RecruitmentStatus;
 import io.swagger.v3.oas.annotations.media.Schema;
 
 import java.util.UUID;
 
+@Schema(description = "크루 모집 상태 변경 Response")
 public record ChangeRecruitmentStatusResponse(
         @Schema(description = "크루 ID")
         UUID id,

src/main/java/com/retrip/crew/application/in/response/CreateDemandResponse.java → src/main/java/com/retrip/crew/application/in/response/demand/CreateDemandResponse.java

@@ -1,11 +1,16 @@
-package com.retrip.crew.application.in.response;
+package com.retrip.crew.application.in.response.demand;
 
 import com.retrip.crew.domain.entity.Demand;
+import io.swagger.v3.oas.annotations.media.Schema;
 
 import java.util.UUID;
 
+@Schema(description = "크루 참여 요청 생성 Response")
 public record CreateDemandResponse(
+        @Schema(description = "크루 ID")
         UUID crewId,
+
+        @Schema(description = "참여 요청자 ID")
         UUID memberId
 ) {
     public static CreateDemandResponse of(UUID crewId, Demand demand) {

src/main/java/com/retrip/crew/application/in/response/demand/CrewsOfDemandResponse.java

@@ -0,0 +1,27 @@
+package com.retrip.crew.application.in.response.demand;
+
+import io.swagger.v3.oas.annotations.media.Schema;
+
+import java.util.UUID;
+
+@Schema(description = "참여자가 속한 크루 목록 조회 Response")
+public record CrewsOfDemandResponse(
+        @Schema(description = "참여 요청자 ID")
+        UUID memberId,
+
+        @Schema(description = "크루 ID")
+        UUID id,
+
+        @Schema(description = "크루 타이틀")
+        String title,
+
+        @Schema(description = "크루 리더 ID")
+        UUID leaderId,
+
+        @Schema(description = "크루원 현재 인원수")
+        long memberCount,
+
+        @Schema(description = "크루원 최대 인원수")
+        int maxMemberCount
+) {
+}

src/main/java/com/retrip/crew/application/in/response/demand/DemandsResponse.java

@@ -0,0 +1,26 @@
+package com.retrip.crew.application.in.response.demand;
+
+import com.retrip.crew.domain.entity.Demand;
+import com.retrip.crew.domain.vo.DemandStatus;
+import io.swagger.v3.oas.annotations.media.Schema;
+
+import java.util.UUID;
+
+@Schema(description = "참여 요청 목록 조회 Response")
+public record DemandsResponse(
+        @Schema(description = "크루 ID")
+        UUID crewId,
+
+        @Schema(description = "참여 요청 ID")
+        UUID demandId,
+
+        @Schema(description = "참여 요청자 ID")
+        UUID memberId,
+
+        @Schema(description = "참여 요청 상태")
+        DemandStatus status
+) {
+    public static DemandsResponse of(UUID crewId, Demand demand) {
+        return new DemandsResponse(crewId, demand.getId(), demand.getMemberId(), demand.getStatus());
+    }
+}

src/main/java/com/retrip/crew/application/in/response/demand/RejectDemandResponse.java

@@ -0,0 +1,26 @@
+package com.retrip.crew.application.in.response.demand;
+
+import com.retrip.crew.domain.entity.Demand;
+import com.retrip.crew.domain.vo.DemandStatus;
+import io.swagger.v3.oas.annotations.media.Schema;
+
+import java.util.UUID;
+
+@Schema(description = "크루 참여 요청 거절 Response")
+public record RejectDemandResponse(
+        @Schema(description = "크루 ID")
+        UUID crewId,
+
+        @Schema(description = "참여 요청 ID")
+        UUID demandId,
+
+        @Schema(description = "참여 요청자 ID")
+        UUID memberId,
+
+        @Schema(description = "참여 요청 상태")
+        DemandStatus status
+) {
+    public static RejectDemandResponse of(Demand demand) {
+        return new RejectDemandResponse(demand.getCrew().getId(), demand.getId(), demand.getMemberId(), demand.getStatus());
+    }
+}

src/main/java/com/retrip/crew/application/in/usecase/GetCrewUseCase.java

@@ -1,8 +1,8 @@
 package com.retrip.crew.application.in.usecase;
 
-import com.retrip.crew.application.in.request.CrewOrder;
-import com.retrip.crew.application.in.response.CrewDetailResponse;
-import com.retrip.crew.application.in.response.CrewListResponse;
+import com.retrip.crew.application.in.request.crew.CrewOrder;
+import com.retrip.crew.application.in.response.crew.CrewDetailResponse;
+import com.retrip.crew.application.in.response.crew.CrewListResponse;
 import com.retrip.crew.infra.adapter.in.presentation.rest.common.ScrollPageResponse;
 import java.util.UUID;
 import org.springframework.data.domain.Pageable;

src/main/java/com/retrip/crew/application/in/usecase/ManageCrewUseCase.java

@@ -1,9 +1,9 @@
 package com.retrip.crew.application.in.usecase;
 
-import com.retrip.crew.application.in.request.CrewCreateRequest;
-import com.retrip.crew.application.in.request.CrewUpdateRequest;
-import com.retrip.crew.application.in.response.CrewCreateResponse;
-import com.retrip.crew.application.in.response.CrewUpdateResponse;
+import com.retrip.crew.application.in.request.crew.CrewCreateRequest;
+import com.retrip.crew.application.in.request.crew.CrewUpdateRequest;
+import com.retrip.crew.application.in.response.crew.CrewCreateResponse;
+import com.retrip.crew.application.in.response.crew.CrewUpdateResponse;
 
 import java.util.UUID;
 

src/main/java/com/retrip/crew/application/in/usecase/ManageDemandUseCase.java

@@ -1,10 +1,25 @@
 package com.retrip.crew.application.in.usecase;
 
-import com.retrip.crew.application.in.request.CreateDemandRequest;
-import com.retrip.crew.application.in.response.CreateDemandResponse;
+import com.retrip.crew.application.in.request.demand.CreateDemandRequest;
+import com.retrip.crew.application.in.request.crew.CrewOrder;
+import com.retrip.crew.application.in.request.demand.DemandOrder;
+import com.retrip.crew.application.in.response.demand.*;
+import org.springframework.data.domain.Page;
+import org.springframework.data.domain.Pageable;
 
 import java.util.UUID;
 
 public interface ManageDemandUseCase {
     CreateDemandResponse createDemand(UUID crewId, CreateDemandRequest request);
+
+    Page<DemandsResponse> getDemands(
+            UUID crewId, UUID memberId, String status, Pageable pageable, DemandOrder order, String sort);
+
+    Page<CrewsOfDemandResponse> getCrewsOfDemand(UUID crewId, UUID demandId, UUID memberId, Pageable pageable, CrewOrder order, String sort);
+
+    void cancelDemand(UUID crewId, UUID demandId, UUID memberId);
+
+    RejectDemandResponse rejectDemand(UUID crewId, UUID demandId, UUID memberId);
+
+    ApproveDemandResponse approveDemand(UUID crewId, UUID demandId, UUID memberId);
 }

src/main/java/com/retrip/crew/application/in/usecase/UpdateRecruitmentUseCase.java

@@ -1,6 +1,6 @@
 package com.retrip.crew.application.in.usecase;
 
-import com.retrip.crew.application.in.response.ChangeRecruitmentStatusResponse;
+import com.retrip.crew.application.in.response.demand.ChangeRecruitmentStatusResponse;
 
 import java.util.UUID;