feat: 방 참여, 나가기 기능 구현

build.gradle

@@ -55,6 +55,10 @@ dependencies {
 
     // Configuration Binding
     annotationProcessor "org.springframework.boot:spring-boot-configuration-processor"
+
+    // Apache Commons Lang 3
+    implementation 'org.apache.commons:commons-lang3:3.13.0'
+
 }
 
 tasks.named('test') {

src/main/java/com/moabam/api/application/MemberService.java

@@ -1,11 +1,13 @@
 package com.moabam.api.application;
 
+import static com.moabam.api.domain.entity.enums.RoomType.*;
 import static com.moabam.global.error.model.ErrorMessage.*;
 
 import org.springframework.stereotype.Service;
 import org.springframework.transaction.annotation.Transactional;
 
 import com.moabam.api.domain.entity.Member;
+import com.moabam.api.domain.entity.enums.RoomType;
 import com.moabam.api.domain.repository.MemberRepository;
 import com.moabam.global.error.exception.NotFoundException;
 
@@ -22,4 +24,42 @@ public Member getById(Long memberId) {
 		return memberRepository.findById(memberId)
 			.orElseThrow(() -> new NotFoundException(MEMBER_NOT_FOUND));
 	}
+
+	public boolean isEnterRoomAvailable(Long memberId, RoomType roomType) {
+		Member member = getById(memberId);
+
+		if (roomType.equals(MORNING) && member.getCurrentMorningCount() >= 3) {
+			return false;
+		}
+
+		if (roomType.equals(NIGHT) && member.getCurrentNightCount() >= 3) {
+			return false;
+		}
+
+		return true;
+	}
+
+	@Transactional
+	public void increaseRoomCount(Long memberId, RoomType roomType) {
+		Member member = getById(memberId);
+
+		if (roomType.equals(MORNING)) {
+			member.enterMorningRoom();
+			return;
+		}
+
+		member.enterNightRoom();
+	}
+
+	@Transactional
+	public void decreaseRoomCount(Long memberId, RoomType roomType) {
+		Member member = getById(memberId);
+
+		if (roomType.equals(MORNING)) {
+			member.exitMorningRoom();
+			return;
+		}
+
+		member.exitNightRoom();
+	}
 }

src/main/java/com/moabam/api/application/RoomService.java

@@ -4,6 +4,7 @@
 
 import java.util.List;
 
+import org.apache.commons.lang3.StringUtils;
 import org.springframework.stereotype.Service;
 import org.springframework.transaction.annotation.Transactional;
 
@@ -15,8 +16,10 @@
 import com.moabam.api.domain.repository.RoomRepository;
 import com.moabam.api.domain.repository.RoutineRepository;
 import com.moabam.api.dto.CreateRoomRequest;
+import com.moabam.api.dto.EnterRoomRequest;
 import com.moabam.api.dto.ModifyRoomRequest;
 import com.moabam.api.dto.RoomMapper;
+import com.moabam.global.error.exception.BadRequestException;
 import com.moabam.global.error.exception.ForbiddenException;
 import com.moabam.global.error.exception.NotFoundException;
 
@@ -31,6 +34,7 @@ public class RoomService {
 	private final RoutineRepository routineRepository;
 	private final ParticipantRepository participantRepository;
 	private final ParticipantSearchRepository participantSearchRepository;
+	private final MemberService memberService;
 
 	@Transactional
 	public void createRoom(Long memberId, CreateRoomRequest createRoomRequest) {
@@ -40,6 +44,7 @@ public void createRoom(Long memberId, CreateRoomRequest createRoomRequest) {
 			.room(room)
 			.memberId(memberId)
 			.build();
+
 		participant.enableManager();
 		roomRepository.save(room);
 		routineRepository.saveAll(routines);
@@ -48,18 +53,83 @@ public void createRoom(Long memberId, CreateRoomRequest createRoomRequest) {
 
 	@Transactional
 	public void modifyRoom(Long memberId, Long roomId, ModifyRoomRequest modifyRoomRequest) {
-		// TODO: 추후에 별도 메서드로 뺄듯
-		Participant participant = participantSearchRepository.findParticipant(roomId, memberId)
-			.orElseThrow(() -> new NotFoundException(PARTICIPANT_NOT_FOUND));
+		Participant participant = getParticipant(memberId, roomId);
 
 		if (!participant.isManager()) {
 			throw new ForbiddenException(ROOM_MODIFY_UNAUTHORIZED_REQUEST);
 		}
 
-		Room room = roomRepository.findById(roomId).orElseThrow(() -> new NotFoundException(ROOM_NOT_FOUND));
+		Room room = getRoom(roomId);
 		room.changeTitle(modifyRoomRequest.title());
 		room.changePassword(modifyRoomRequest.password());
 		room.changeCertifyTime(modifyRoomRequest.certifyTime());
 		room.changeMaxCount(modifyRoomRequest.maxUserCount());
 	}
+
+	@Transactional
+	public void enterRoom(Long memberId, Long roomId, EnterRoomRequest enterRoomRequest) {
+		Room room = getRoom(roomId);
+		validateRoomEnter(memberId, enterRoomRequest.password(), room);
+
+		room.increaseCurrentUserCount();
+		memberService.increaseRoomCount(memberId, room.getRoomType());
+
+		Participant participant = Participant.builder()
+			.room(room)
+			.memberId(memberId)
+			.build();
+		participantRepository.save(participant);
+	}
+
+	@Transactional
+	public void exitRoom(Long memberId, Long roomId) {
+		Participant participant = getParticipant(memberId, roomId);
+		Room room = participant.getRoom();
+
+		if (participant.isManager() && room.getCurrentUserCount() != 1) {
+			throw new BadRequestException(ROOM_EXIT_MANAGER_FAIL);
+		}
+
+		memberService.decreaseRoomCount(memberId, room.getRoomType());
+		participant.removeRoom();
+		participantRepository.flush();
+		participantRepository.delete(participant);
+
+		if (!participant.isManager()) {
+			room.decreaseCurrentUserCount();
+			return;
+		}
+
+		roomRepository.flush();
+		roomRepository.delete(room);
+	}
+
+	public void validateRoomById(Long roomId) {
+		if (!roomRepository.existsById(roomId)) {
+			throw new NotFoundException(ROOM_NOT_FOUND);
+		}
+	}
+
+	private Participant getParticipant(Long memberId, Long roomId) {
+		return participantSearchRepository.findParticipant(memberId, roomId)
+			.orElseThrow(() -> new NotFoundException(PARTICIPANT_NOT_FOUND));
+	}
+
+	private Room getRoom(Long roomId) {
+		return roomRepository.findById(roomId).orElseThrow(() -> new NotFoundException(ROOM_NOT_FOUND));
+	}
+
+	private void validateRoomEnter(Long memberId, String requestPassword, Room room) {
+		if (!memberService.isEnterRoomAvailable(memberId, room.getRoomType())) {
+			throw new BadRequestException(MEMBER_ROOM_EXCEED);
+		}
+
+		if (!StringUtils.isEmpty(requestPassword) && !room.getPassword().equals(requestPassword)) {
+			throw new BadRequestException(WRONG_ROOM_PASSWORD);
+		}
+
+		if (room.getCurrentUserCount() == room.getMaxUserCount()) {
+			throw new BadRequestException(ROOM_MAX_USER_REACHED);
+		}
+	}
 }

src/main/java/com/moabam/api/domain/entity/Member.java

@@ -30,7 +30,7 @@
 @Getter
 @Table(name = "member")
 @SQLDelete(sql = "UPDATE member SET deleted_at = CURRENT_TIMESTAMP where id = ?")
-@Where(clause = "deleted_at IS NOT NULL")
+@Where(clause = "deleted_at IS NULL")
 @NoArgsConstructor(access = AccessLevel.PROTECTED)
 public class Member extends BaseTimeEntity {
 
@@ -103,7 +103,7 @@ public void exitMorningRoom() {
 	}
 
 	public void exitNightRoom() {
-		if (currentMorningCount > 0) {
+		if (currentNightCount > 0) {
 			currentNightCount--;
 		}
 	}

src/main/java/com/moabam/api/domain/entity/Participant.java

@@ -33,7 +33,7 @@ public class Participant {
 	private Long id;
 
 	@ManyToOne(fetch = FetchType.LAZY)
-	@JoinColumn(name = "room_id", updatable = false, nullable = false)
+	@JoinColumn(name = "room_id", updatable = false)
 	private Room room;
 
 	@Column(name = "member_id", updatable = false, nullable = false)
@@ -48,6 +48,9 @@ public class Participant {
 	@Column(name = "deleted_at")
 	private LocalDateTime deletedAt;
 
+	@Column(name = "deleted_room_title", length = 30)
+	private String deletedRoomTitle;
+
 	@Builder
 	private Participant(Long id, Room room, Long memberId) {
 		this.id = id;
@@ -68,4 +71,9 @@ public void enableManager() {
 	public void updateCertifyCount() {
 		this.certifyCount += 1;
 	}
+
+	public void removeRoom() {
+		this.deletedRoomTitle = this.room.getTitle();
+		this.room = null;
+	}
 }

src/main/java/com/moabam/api/domain/entity/Room.java

@@ -43,7 +43,6 @@ public class Room extends BaseTimeEntity {
 	@Column(name = "id")
 	private Long id;
 
-	// TODO: 한글 10자도 맞나?
 	@Column(name = "title", nullable = false, length = 30)
 	private String title;
 
@@ -66,7 +65,6 @@ public class Room extends BaseTimeEntity {
 	@Column(name = "max_user_count", nullable = false)
 	private int maxUserCount;
 
-	// TODO: 한글 길이 고려
 	@Column(name = "announcement", length = 255)
 	private String announcement;
 
@@ -111,6 +109,18 @@ public void changeMaxCount(int maxUserCount) {
 		this.maxUserCount = maxUserCount;
 	}
 
+	public void increaseCurrentUserCount() {
+		this.currentUserCount += 1;
+
+		if (this.currentUserCount > this.maxUserCount) {
+			throw new BadRequestException(ROOM_MAX_USER_REACHED);
+		}
+	}
+
+	public void decreaseCurrentUserCount() {
+		this.currentUserCount -= 1;
+	}
+
 	public void upgradeRoomImage(String roomImage) {
 		this.roomImage = roomImage;
 	}

src/main/java/com/moabam/api/domain/repository/ParticipantSearchRepository.java

@@ -18,7 +18,7 @@ public class ParticipantSearchRepository {
 
 	private final JPAQueryFactory jpaQueryFactory;
 
-	public Optional<Participant> findParticipant(Long roomId, Long memberId) {
+	public Optional<Participant> findParticipant(Long memberId, Long roomId) {
 		return Optional.ofNullable(
 			jpaQueryFactory.selectFrom(participant)
 				.where(

src/main/java/com/moabam/api/dto/EnterRoomRequest.java

@@ -0,0 +1,9 @@
+package com.moabam.api.dto;
+
+import jakarta.validation.constraints.Pattern;
+
+public record EnterRoomRequest(
+	@Pattern(regexp = "^(|[0-9]{4,8})$") String password
+) {
+
+}

src/main/java/com/moabam/api/presentation/RoomController.java

@@ -1,6 +1,7 @@
 package com.moabam.api.presentation;
 
 import org.springframework.http.HttpStatus;
+import org.springframework.web.bind.annotation.DeleteMapping;
 import org.springframework.web.bind.annotation.PathVariable;
 import org.springframework.web.bind.annotation.PostMapping;
 import org.springframework.web.bind.annotation.PutMapping;
@@ -11,6 +12,7 @@
 
 import com.moabam.api.application.RoomService;
 import com.moabam.api.dto.CreateRoomRequest;
+import com.moabam.api.dto.EnterRoomRequest;
 import com.moabam.api.dto.ModifyRoomRequest;
 
 import jakarta.validation.Valid;
@@ -35,4 +37,16 @@ public void modifyRoom(@Valid @RequestBody ModifyRoomRequest modifyRoomRequest,
 		@PathVariable("roomId") Long roomId) {
 		roomService.modifyRoom(1L, roomId, modifyRoomRequest);
 	}
+
+	@PostMapping("/{roomId}")
+	@ResponseStatus(HttpStatus.OK)
+	public void enterRoom(@Valid @RequestBody EnterRoomRequest enterRoomRequest, @PathVariable("roomId") Long roomId) {
+		roomService.enterRoom(1L, roomId, enterRoomRequest);
+	}
+
+	@DeleteMapping("/{roomId}")
+	@ResponseStatus(HttpStatus.OK)
+	public void exitRoom(@PathVariable("roomId") Long roomId) {
+		roomService.exitRoom(1L, roomId);
+	}
 }

src/main/java/com/moabam/global/error/model/ErrorMessage.java

@@ -12,12 +12,16 @@ public enum ErrorMessage {
 	ROOM_NOT_FOUND("존재하지 않는 방 입니다."),
 	ROOM_MAX_USER_COUNT_MODIFY_FAIL("잘못된 최대 인원수 설정입니다."),
 	ROOM_MODIFY_UNAUTHORIZED_REQUEST("방장이 아닌 사용자는 방을 수정할 수 없습니다."),
+	ROOM_EXIT_MANAGER_FAIL("인원수가 2명 이상일때는 방장을 위임해야합니다."),
 	PARTICIPANT_NOT_FOUND("방에 대한 참여자의 정보가 없습니다."),
+	WRONG_ROOM_PASSWORD("방의 비밀번호가 일치하지 않습니다."),
+	ROOM_MAX_USER_REACHED("방의 인원수가 찼습니다."),
 
 	LOGIN_FAILED("로그인에 실패했습니다."),
 	REQUEST_FAILED("네트워크 접근 실패입니다."),
 	GRANT_FAILED("인가 코드 실패"),
 	MEMBER_NOT_FOUND("존재하지 않는 회원입니다."),
+	MEMBER_ROOM_EXCEED("참여할 수 있는 방의 갯수가 모두 찼습니다."),
 
 	INVALID_BUG_COUNT("벌레 개수는 0 이상이어야 합니다."),
 	INVALID_PRICE("가격은 0 이상이어야 합니다."),