채팅 데이터 생성 및 모임마다의 전체 조회 기능 구현

backend/src/main/java/mouda/backend/chat/controller/ChatController.java

@@ -0,0 +1,44 @@
+package mouda.backend.chat.controller;
+
+import org.springframework.http.ResponseEntity;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.PostMapping;
+import org.springframework.web.bind.annotation.RequestBody;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RequestParam;
+import org.springframework.web.bind.annotation.RestController;
+
+import jakarta.validation.Valid;
+import lombok.RequiredArgsConstructor;
+import mouda.backend.chat.dto.request.ChatCreateRequest;
+import mouda.backend.chat.dto.response.ChatFindUnloadedResponse;
+import mouda.backend.chat.service.ChatService;
+import mouda.backend.common.RestResponse;
+import mouda.backend.member.domain.Member;
+
+@RestController
+@RequestMapping("/v1/chat")
+@RequiredArgsConstructor
+public class ChatController {
+
+	private final ChatService chatService;
+
+	@PostMapping
+	public ResponseEntity<Void> createChat(
+		@Valid @RequestBody ChatCreateRequest chatCreateRequest,
+		Member member
+	) {
+		chatService.createChat(chatCreateRequest, member);
+		return ResponseEntity.ok().build();
+	}
+
+	@GetMapping
+	public ResponseEntity<RestResponse<ChatFindUnloadedResponse>> findUnloadedChats(
+		@RequestParam Long recentChatId,
+		@RequestParam Long moimId,
+		Member member
+	) {
+		ChatFindUnloadedResponse unloadedChats = chatService.findUnloadedChats(recentChatId, moimId, member);
+		return ResponseEntity.ok(new RestResponse<>(unloadedChats));
+	}
+}

backend/src/main/java/mouda/backend/chat/dto/request/ChatCreateRequest.java

@@ -0,0 +1,25 @@
+package mouda.backend.chat.dto.request;
+
+import java.time.LocalDate;
+import java.time.LocalTime;
+
+import jakarta.validation.constraints.NotBlank;
+import jakarta.validation.constraints.NotNull;
+import mouda.backend.chat.domain.Chat;
+import mouda.backend.member.domain.Member;
+import mouda.backend.moim.domain.Moim;
+
+public record ChatCreateRequest(
+	@NotNull Long moimId,
+	@NotBlank String content
+) {
+	public Chat toEntity(Moim moim, Member member) {
+		return Chat.builder()
+			.content(content)
+			.date(LocalDate.now())
+			.time(LocalTime.now())
+			.member(member)
+			.moim(moim)
+			.build();
+	}
+}

backend/src/main/java/mouda/backend/chat/dto/response/ChatFindDetailResponse.java

@@ -0,0 +1,28 @@
+package mouda.backend.chat.dto.response;
+
+import java.time.LocalDate;
+import java.time.LocalTime;
+
+import lombok.Builder;
+import mouda.backend.chat.domain.Chat;
+
+@Builder
+public record ChatFindDetailResponse(
+	long chatId,
+	String content,
+	long memberId,
+	String nickname,
+	LocalDate date,
+	LocalTime time
+) {
+	public static ChatFindDetailResponse toResponse(Chat chat) {
+		return ChatFindDetailResponse.builder()
+			.chatId(chat.getId())
+			.content(chat.getContent())
+			.memberId(chat.getMember().getId())
+			.nickname(chat.getMember().getNickname())
+			.date(chat.getDate())
+			.time(chat.getTime())
+			.build();
+	}
+}

backend/src/main/java/mouda/backend/chat/dto/response/ChatFindUnloadedResponse.java

@@ -0,0 +1,9 @@
+package mouda.backend.chat.dto.response;
+
+import java.util.List;
+
+public record ChatFindUnloadedResponse(
+	long loginMemberId,
+	List<ChatFindDetailResponse> chats
+) {
+}

backend/src/main/java/mouda/backend/chat/exception/ChatErrorMessage.java

@@ -0,0 +1,12 @@
+package mouda.backend.chat.exception;
+
+import lombok.AllArgsConstructor;
+import lombok.Getter;
+
+@Getter
+@AllArgsConstructor
+public enum ChatErrorMessage {
+	MOIM_NOT_FOUND("존재하지 않는 모임에 채팅할 수 없습니다.");
+
+	private final String message;
+}

backend/src/main/java/mouda/backend/chat/exception/ChatException.java

@@ -0,0 +1,12 @@
+package mouda.backend.chat.exception;
+
+import org.springframework.http.HttpStatus;
+
+import mouda.backend.exception.MoudaException;
+
+public class ChatException extends MoudaException {
+
+	public ChatException(HttpStatus httpStatus, ChatErrorMessage chatErrorMessage) {
+		super(httpStatus, chatErrorMessage.getMessage());
+	}
+}

backend/src/main/java/mouda/backend/chat/repository/ChatRepository.java

@@ -0,0 +1,15 @@
+package mouda.backend.chat.repository;
+
+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 mouda.backend.chat.domain.Chat;
+
+public interface ChatRepository extends JpaRepository<Chat, Long> {
+
+	@Query("SELECT c FROM Chat c WHERE c.moim.id = :moimId AND c.id > :chatId")
+	List<Chat> findAllUnloadedChats(@Param("moimId") long moimId, @Param("chatId") long chatId);
+}

backend/src/main/java/mouda/backend/chat/service/ChatService.java

@@ -0,0 +1,40 @@
+package mouda.backend.chat.service;
+
+import java.util.List;
+
+import org.springframework.http.HttpStatus;
+import org.springframework.stereotype.Service;
+
+import lombok.RequiredArgsConstructor;
+import mouda.backend.chat.domain.Chat;
+import mouda.backend.chat.dto.request.ChatCreateRequest;
+import mouda.backend.chat.dto.response.ChatFindDetailResponse;
+import mouda.backend.chat.dto.response.ChatFindUnloadedResponse;
+import mouda.backend.chat.exception.ChatErrorMessage;
+import mouda.backend.chat.exception.ChatException;
+import mouda.backend.chat.repository.ChatRepository;
+import mouda.backend.member.domain.Member;
+import mouda.backend.moim.domain.Moim;
+import mouda.backend.moim.repository.MoimRepository;
+
+@Service
+@RequiredArgsConstructor
+public class ChatService {
+
+	private final ChatRepository chatRepository;
+	private final MoimRepository moimRepository;
+
+	public void createChat(ChatCreateRequest chatCreateRequest, Member member) {
+		Moim moim = moimRepository.findById(chatCreateRequest.moimId())
+			.orElseThrow(() -> new ChatException(HttpStatus.BAD_REQUEST, ChatErrorMessage.MOIM_NOT_FOUND));
+		Chat chat = chatCreateRequest.toEntity(moim, member);
+		chatRepository.save(chat);
+	}
+
+	public ChatFindUnloadedResponse findUnloadedChats(long recentChatId, long moimId, Member member) {
+		List<ChatFindDetailResponse> chats = chatRepository.findAllUnloadedChats(moimId, recentChatId).stream()
+			.map(ChatFindDetailResponse::toResponse)
+			.toList();
+		return new ChatFindUnloadedResponse(member.getId(), chats);
+	}
+}

backend/src/test/java/mouda/backend/chat/repository/ChatRepositoryTest.java

@@ -0,0 +1,54 @@
+package mouda.backend.chat.repository;
+
+import static org.assertj.core.api.Assertions.*;
+
+import java.util.List;
+
+import org.junit.jupiter.api.DisplayName;
+import org.junit.jupiter.api.Test;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.test.autoconfigure.orm.jpa.DataJpaTest;
+
+import mouda.backend.chat.domain.Chat;
+import mouda.backend.fixture.ChatFixture;
+import mouda.backend.fixture.MemberFixture;
+import mouda.backend.fixture.MoimFixture;
+import mouda.backend.member.domain.Member;
+import mouda.backend.member.repository.MemberRepository;
+import mouda.backend.moim.domain.Moim;
+import mouda.backend.moim.repository.MoimRepository;
+
+@DataJpaTest
+class ChatRepositoryTest {
+
+	@Autowired
+	private ChatRepository chatRepository;
+
+	@Autowired
+	private MoimRepository moimRepository;
+
+	@Autowired
+	private MemberRepository memberRepository;
+
+	@DisplayName("모임 아이디가 동일하고 채팅 아이디가 더 큰 채팅 리스트가 조회된다.")
+	@Test
+	void test() {
+		Moim moim = MoimFixture.getCoffeeMoim();
+		moimRepository.save(moim);
+
+		Member member1 = MemberFixture.getAnna();
+		Member member2 = MemberFixture.getHogee();
+
+		memberRepository.save(member1);
+		memberRepository.save(member2);
+
+		Chat anna = ChatFixture.getChatWithMemberAtMoim(member1, moim);
+		chatRepository.save(anna);
+		Chat hogee = ChatFixture.getChatWithMemberAtMoim(member2, moim);
+		chatRepository.save(hogee);
+
+		List<Chat> chats = chatRepository.findAllUnloadedChats(1L, 1L);
+
+		assertThat(chats).hasSize(1);
+	}
+}

backend/src/test/java/mouda/backend/fixture/ChatFixture.java

@@ -4,36 +4,18 @@
 import java.time.LocalTime;
 
 import mouda.backend.chat.domain.Chat;
+import mouda.backend.member.domain.Member;
+import mouda.backend.moim.domain.Moim;
 
 public class ChatFixture {
 
-	public static Chat getChatWithHogeeAtBasketballMoim() {
+	public static Chat getChatWithMemberAtMoim(Member member, Moim moim) {
 		return Chat.builder()
 			.time(LocalTime.now())
 			.date(LocalDate.now())
-			.content("ㅎㅇㅎㅇ")
-			.member(MemberFixture.getHogee())
-			.moim(MoimFixture.getBasketballMoim())
-			.build();
-	}
-
-	public static Chat getChatWithAnnaAtCoffeeMoim() {
-		return Chat.builder()
-			.time(LocalTime.now())
-			.date(LocalDate.now())
-			.content("반갑읍니다")
-			.member(MemberFixture.getAnna())
-			.moim(MoimFixture.getCoffeeMoim())
-			.build();
-	}
-
-	public static Chat getChatWithTebahAtSoccerMoim() {
-		return Chat.builder()
-			.time(LocalTime.now())
-			.date(LocalDate.now())
-			.content("ㅎㅇㅎㅇ")
-			.member(MemberFixture.getTebah())
-			.moim(MoimFixture.getSoccerMoim())
+			.content("안녕하쎄요")
+			.member(member)
+			.moim(moim)
 			.build();
 	}
 }

backend/src/test/java/mouda/backend/fixture/MoimFixture.java

@@ -36,7 +36,7 @@ public static Moim getCoffeeMoim() {
 			.date(LocalDate.now().plusDays(1))
 			.place("안나 집")
 			.description("커피 머신 들고와라")
-			.maxPeople(100)
+			.maxPeople(60)
 			.build();
 	}
 }