[BE] 인원 변동 기능 구현

server/src/main/java/server/haengdong/application/EventService.java

@@ -20,6 +20,6 @@ public EventAppResponse saveEvent(EventAppRequest request) {
         Event event = request.toEvent(token);
         eventRepository.save(event);
 
-         return EventAppResponse.of(event);
+        return EventAppResponse.of(event);
     }
 }

server/src/main/java/server/haengdong/application/MemberActionService.java

@@ -0,0 +1,32 @@
+package server.haengdong.application;
+
+import java.util.List;
+import lombok.RequiredArgsConstructor;
+import org.springframework.stereotype.Service;
+import org.springframework.transaction.annotation.Transactional;
+import server.haengdong.application.request.MemberActionSaveListAppRequest;
+import server.haengdong.domain.Event;
+import server.haengdong.domain.MemberAction;
+import server.haengdong.domain.MemberActionFactory;
+import server.haengdong.persistence.EventRepository;
+import server.haengdong.persistence.MemberActionRepository;
+
+@RequiredArgsConstructor
+@Transactional(readOnly = true)
+@Service
+public class MemberActionService {
+
+    private final MemberActionRepository memberActionRepository;
+    private final EventRepository eventRepository;
+    private final MemberActionFactory memberActionFactory;
+
+    @Transactional
+    public void saveMemberAction(String token, MemberActionSaveListAppRequest request) {
+        Event event = eventRepository.findByToken(token)
+                .orElseThrow(() -> new IllegalArgumentException("event not found"));
+
+        List<MemberAction> findMemberActions = memberActionRepository.findAllByEvent(event);
+        List<MemberAction> memberActions = memberActionFactory.createMemberActions(request, findMemberActions, event);
+        memberActionRepository.saveAll(memberActions);
+    }
+}

server/src/main/java/server/haengdong/application/request/MemberActionSaveAppRequest.java

@@ -0,0 +1,12 @@
+package server.haengdong.application.request;
+
+import server.haengdong.domain.Action;
+import server.haengdong.domain.MemberAction;
+import server.haengdong.domain.MemberActionStatus;
+
+public record MemberActionSaveAppRequest(String name, String status) {
+
+    public MemberAction toMemberAction(Action action, Long memberGroupId) {
+        return new MemberAction(action, name, MemberActionStatus.of(status), memberGroupId);
+    }
+}

server/src/main/java/server/haengdong/application/request/MemberActionSaveListAppRequest.java

@@ -0,0 +1,6 @@
+package server.haengdong.application.request;
+
+import java.util.List;
+
+public record MemberActionSaveListAppRequest(List<MemberActionSaveAppRequest> actions) {
+}

server/src/main/java/server/haengdong/domain/Action.java

@@ -23,4 +23,9 @@ public class Action {
     private Event event;
 
     private Long sequence;
+
+    public Action(Event event, Long sequence) {
+        this.event = event;
+        this.sequence = sequence;
+    }
 }

server/src/main/java/server/haengdong/domain/EventStep.java

@@ -21,7 +21,7 @@ public class EventStep {
 
     @ManyToOne(fetch = FetchType.LAZY)
     private Event event;
-    
+
     private String name;
 
     private Long sequence;

server/src/main/java/server/haengdong/domain/MemberAction.java

@@ -1,5 +1,6 @@
 package server.haengdong.domain;
 
+import jakarta.persistence.CascadeType;
 import jakarta.persistence.Entity;
 import jakarta.persistence.EnumType;
 import jakarta.persistence.Enumerated;
@@ -21,7 +22,7 @@ public class MemberAction {
     @GeneratedValue(strategy = GenerationType.IDENTITY)
     private Long id;
 
-    @OneToOne(fetch = FetchType.LAZY)
+    @OneToOne(fetch = FetchType.LAZY, cascade = CascadeType.ALL, orphanRemoval = true)
     private Action action;
 
     private String memberName;
@@ -30,4 +31,19 @@ public class MemberAction {
     private MemberActionStatus status;
 
     private Long memberGroupId;
+
+    public MemberAction(Action action, String memberName, MemberActionStatus status, Long memberGroupId) {
+        this.action = action;
+        this.memberName = memberName;
+        this.status = status;
+        this.memberGroupId = memberGroupId;
+    }
+
+    public boolean isSameName(String name) {
+        return memberName.equals(name);
+    }
+
+    public boolean isAvailable(MemberActionStatus memberActionStatus) {
+        return status.isOpposite(memberActionStatus);
+    }
 }

server/src/main/java/server/haengdong/domain/MemberActionFactory.java

@@ -0,0 +1,65 @@
+package server.haengdong.domain;
+
+import java.util.ArrayList;
+import java.util.List;
+import lombok.RequiredArgsConstructor;
+import org.springframework.stereotype.Component;
+import server.haengdong.application.request.MemberActionSaveAppRequest;
+import server.haengdong.application.request.MemberActionSaveListAppRequest;
+import server.haengdong.persistence.ActionRepository;
+
+@RequiredArgsConstructor
+@Component
+public class MemberActionFactory {
+
+    private final ActionRepository actionRepository;
+    private final MemberGroupIdProvider memberGroupIdProvider;
+
+    public List<MemberAction> createMemberActions(
+            MemberActionSaveListAppRequest request,
+            List<MemberAction> memberActions,
+            Event event
+    ) {
+        validateActions(request, memberActions);
+        Long memberGroupId = memberGroupIdProvider.createGroupId();
+        long lastSequence = getLastSequence(event);
+        List<MemberAction> memberActionList = new ArrayList<>();
+        List<MemberActionSaveAppRequest> actions = request.actions();
+        for (MemberActionSaveAppRequest appRequest : actions) {
+            Action action = new Action(event, ++lastSequence);
+            MemberAction memberAction = appRequest.toMemberAction(action, memberGroupId);
+            memberActionList.add(memberAction);
+        }
+        return memberActionList;
+    }
+
+    private void validateActions(MemberActionSaveListAppRequest request, List<MemberAction> memberActions) {
+        for (MemberActionSaveAppRequest action : request.actions()) {
+            validateAction(memberActions, action);
+        }
+    }
+
+    private void validateAction(List<MemberAction> memberActions, MemberActionSaveAppRequest action) {
+        if (!isAvailableAction(memberActions, action.name(), action.status())) {
+            throw new IllegalArgumentException();
+        }
+    }
+
+    private long getLastSequence(Event event) {
+        return actionRepository.findLastByEvent(event)
+                .map(Action::getSequence)
+                .orElse(0L);
+    }
+
+    private boolean isAvailableAction(List<MemberAction> actions, String name, String status) {
+        MemberActionStatus memberActionStatus = MemberActionStatus.of(status);
+        for (int i = actions.size() - 1; i >= 0; i--) {
+            MemberAction action = actions.get(i);
+            if (action.isSameName(name)) {
+                return action.isAvailable(memberActionStatus);
+            }
+        }
+
+        return MemberActionStatus.isMemberStatusIn(memberActionStatus);
+    }
+}

server/src/main/java/server/haengdong/domain/MemberActionStatus.java

@@ -1,7 +1,24 @@
 package server.haengdong.domain;
 
+import java.util.Arrays;
+
 public enum MemberActionStatus {
     IN,
     OUT,
     ;
+
+    public static MemberActionStatus of(String status) {
+        return Arrays.stream(MemberActionStatus.values())
+                .filter(s -> s.name().equals(status))
+                .findFirst()
+                .orElseThrow(() -> new IllegalArgumentException("Invalid status: " + status));
+    }
+
+    public static boolean isMemberStatusIn(MemberActionStatus memberActionStatus) {
+        return IN == memberActionStatus;
+    }
+
+    public boolean isOpposite(MemberActionStatus memberActionStatus) {
+        return this != memberActionStatus;
+    }
 }

server/src/main/java/server/haengdong/domain/MemberGroupIdProvider.java

@@ -0,0 +1,11 @@
+package server.haengdong.domain;
+
+import org.springframework.stereotype.Component;
+
+@Component
+public class MemberGroupIdProvider {
+
+    public Long createGroupId() {
+        return System.currentTimeMillis();
+    }
+}

server/src/main/java/server/haengdong/persistence/ActionRepository.java

@@ -0,0 +1,22 @@
+package server.haengdong.persistence;
+
+import java.util.Optional;
+import org.springframework.data.jpa.repository.JpaRepository;
+import org.springframework.data.jpa.repository.Query;
+import org.springframework.data.repository.query.Param;
+import org.springframework.stereotype.Repository;
+import server.haengdong.domain.Action;
+import server.haengdong.domain.Event;
+
+@Repository
+public interface ActionRepository extends JpaRepository<Action, Long> {
+
+    @Query("""
+            SELECT a
+            FROM Action a
+            WHERE a.event = :event
+            ORDER BY a.sequence DESC
+            LIMIT 1
+            """)
+    Optional<Action> findLastByEvent(@Param("event") Event event);
+}

server/src/main/java/server/haengdong/persistence/EventRepository.java

@@ -1,9 +1,11 @@
 package server.haengdong.persistence;
 
+import java.util.Optional;
 import org.springframework.data.jpa.repository.JpaRepository;
 import org.springframework.stereotype.Repository;
 import server.haengdong.domain.Event;
 
 @Repository
 public interface EventRepository extends JpaRepository<Event, Long> {
+    Optional<Event> findByToken(String token);
 }

server/src/main/java/server/haengdong/persistence/MemberActionRepository.java

@@ -0,0 +1,16 @@
+package server.haengdong.persistence;
+
+import java.util.List;
+import org.springframework.data.jpa.repository.JpaRepository;
+import org.springframework.data.jpa.repository.Query;
+import org.springframework.data.repository.query.Param;
+import org.springframework.stereotype.Repository;
+import server.haengdong.domain.Event;
+import server.haengdong.domain.MemberAction;
+
+@Repository
+public interface MemberActionRepository extends JpaRepository<MemberAction, Long> {
+
+    @Query("select m from MemberAction m where m.action.event = :event")
+    List<MemberAction> findAllByEvent(@Param("event") Event event);
+}

server/src/main/java/server/haengdong/presentation/MemberActionController.java

@@ -0,0 +1,27 @@
+package server.haengdong.presentation;
+
+import lombok.RequiredArgsConstructor;
+import org.springframework.http.ResponseEntity;
+import org.springframework.web.bind.annotation.PathVariable;
+import org.springframework.web.bind.annotation.PostMapping;
+import org.springframework.web.bind.annotation.RequestBody;
+import org.springframework.web.bind.annotation.RestController;
+import server.haengdong.application.MemberActionService;
+import server.haengdong.presentation.request.MemberActionSaveListRequest;
+
+@RequiredArgsConstructor
+@RestController
+public class MemberActionController {
+
+    private final MemberActionService memberActionService;
+
+    @PostMapping("/api/events/{token}/actions/members")
+    public ResponseEntity<Void> saveMemberAction(
+            @PathVariable("token") String token,
+            @RequestBody MemberActionSaveListRequest request
+    ) {
+        memberActionService.saveMemberAction(token, request.toAppRequest());
+
+        return ResponseEntity.ok().build();
+    }
+}

server/src/main/java/server/haengdong/presentation/request/MemberActionSaveListRequest.java

@@ -0,0 +1,16 @@
+package server.haengdong.presentation.request;
+
+import java.util.List;
+import server.haengdong.application.request.MemberActionSaveAppRequest;
+import server.haengdong.application.request.MemberActionSaveListAppRequest;
+
+public record MemberActionSaveListRequest(List<MemberActionSaveRequest> actions) {
+
+    public MemberActionSaveListAppRequest toAppRequest() {
+        List<MemberActionSaveAppRequest> appRequests = actions.stream()
+                .map(MemberActionSaveRequest::toAppRequest)
+                .toList();
+
+        return new MemberActionSaveListAppRequest(appRequests);
+    }
+}

server/src/main/java/server/haengdong/presentation/request/MemberActionSaveRequest.java

@@ -0,0 +1,10 @@
+package server.haengdong.presentation.request;
+
+import server.haengdong.application.request.MemberActionSaveAppRequest;
+
+public record MemberActionSaveRequest(String name, String status) {
+
+    public MemberActionSaveAppRequest toAppRequest() {
+        return new MemberActionSaveAppRequest(name, status);
+    }
+}