Feature/5 커뮤니티 게시글 생성 기능

src/main/java/com/somemore/community/domain/CommunityBoard.java

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+package com.somemore.community.domain;
+
+import com.somemore.global.common.BaseEntity;
+import static lombok.AccessLevel.PROTECTED;
+
+import jakarta.persistence.Column;
+import jakarta.persistence.Entity;
+import jakarta.persistence.GeneratedValue;
+import jakarta.persistence.Id;
+import jakarta.persistence.GenerationType;
+import jakarta.persistence.Lob;
+import jakarta.persistence.Table;
+
+import lombok.Builder;
+import lombok.Getter;
+import lombok.NoArgsConstructor;
+
+import java.util.UUID;
+
+@Getter
+@NoArgsConstructor(access = PROTECTED)
+@Entity
+@Table(name = "community_board")
+public class CommunityBoard extends BaseEntity {
+
+    @Id
+    @GeneratedValue(strategy = GenerationType.IDENTITY)
+    @Column(name = "id", nullable = false)
+    private Long id;
+
+    @Column(name = "writer_id", nullable = false, length = 16)
+    private UUID writerId;
+
+    @Column(name = "title", nullable = false)
+    private String title;
+
+    @Lob
+    @Column(name = "content", nullable = false)
+    private String content;
+
+    @Column(name = "img_url", nullable = false)
+    private String imgUrl;
+
+    @Builder
+    public CommunityBoard(UUID writerId, String title, String content, String imgUrl) {
+        this.writerId = writerId;
+        this.title = title;
+        this.content = content;
+        this.imgUrl = imgUrl;
+    }
+}

src/main/java/com/somemore/community/dto/request/CommunityBoardCreateRequestDto.java

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+package com.somemore.community.dto.request;
+
+import com.fasterxml.jackson.databind.PropertyNamingStrategies.SnakeCaseStrategy;
+import com.fasterxml.jackson.databind.annotation.JsonNaming;
+import com.somemore.community.domain.CommunityBoard;
+import io.swagger.v3.oas.annotations.media.Schema;
+import jakarta.validation.constraints.NotBlank;
+import lombok.Builder;
+
+import java.util.UUID;
+
+@JsonNaming(SnakeCaseStrategy.class)
+@Builder
+public record CommunityBoardCreateRequestDto(
+        @Schema(description = "커뮤니티 게시글 제목", example = "11/29 OO도서관 봉사 같이 갈 사람 모집합니다.")
+        @NotBlank(message = "게시글 제목은 필수 값입니다.")
+        String title,
+        @Schema(description = "커뮤니티 게시글 내용", example = "저 포함 5명이 같이 가면 좋을 거 같아요")
+        @NotBlank(message = "게시글 내용은 필수 값입니다.")
+        String content
+) {
+    public CommunityBoard toEntity(UUID writerId, String imgUrl) {
+        return CommunityBoard.builder()
+                .writerId(writerId)
+                .title(title)
+                .content(content)
+                .imgUrl(imgUrl)
+                .build();
+    }
+
+
+}

src/main/java/com/somemore/community/repository/CommunityBoardRepository.java

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+package com.somemore.community.repository;
+
+import com.somemore.community.domain.CommunityBoard;
+import org.springframework.data.jpa.repository.JpaRepository;
+
+public interface CommunityBoardRepository extends JpaRepository<CommunityBoard, Long> {
+
+}

src/main/java/com/somemore/community/service/command/CreateCommunityBoardService.java

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+package com.somemore.community.service.command;
+
+import com.somemore.community.domain.CommunityBoard;
+import com.somemore.community.dto.request.CommunityBoardCreateRequestDto;
+import com.somemore.community.repository.CommunityBoardRepository;
+import com.somemore.community.usecase.command.CreateCommunityBoardUseCase;
+import lombok.RequiredArgsConstructor;
+import org.springframework.stereotype.Service;
+import org.springframework.transaction.annotation.Transactional;
+
+import java.util.UUID;
+
+@RequiredArgsConstructor
+@Transactional
+@Service
+public class CreateCommunityBoardService implements CreateCommunityBoardUseCase {
+
+    private final CommunityBoardRepository communityBoardRepository;
+
+    @Override
+    public Long createCommunityBoard(CommunityBoardCreateRequestDto requestDto, UUID writerId, String imgUrl) {
+
+        CommunityBoard communityBoard = requestDto.toEntity(writerId, imgUrl == null ? "" : imgUrl);
+
+        communityBoardRepository.save(communityBoard);
+
+        return communityBoard.getId();
+    }
+}

src/main/java/com/somemore/community/usecase/command/CreateCommunityBoardUseCase.java

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+package com.somemore.community.usecase.command;
+
+import com.somemore.community.dto.request.CommunityBoardCreateRequestDto;
+
+import java.util.UUID;
+
+public interface CreateCommunityBoardUseCase {
+    Long createCommunityBoard(
+        CommunityBoardCreateRequestDto requestDto,
+        UUID writerId,
+        String imgUrl);
+}

src/test/java/com/somemore/community/service/command/CreateCommunityBoardServiceTest.java

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+package com.somemore.community.service.command;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+import com.somemore.IntegrationTestSupport;
+import com.somemore.community.domain.CommunityBoard;
+import com.somemore.community.dto.request.CommunityBoardCreateRequestDto;
+import com.somemore.community.repository.CommunityBoardRepository;
+import org.junit.jupiter.api.AfterEach;
+import org.junit.jupiter.api.DisplayName;
+import org.junit.jupiter.api.Test;
+import org.springframework.beans.factory.annotation.Autowired;
+
+import java.util.Optional;
+import java.util.UUID;
+
+class CreateCommunityBoardServiceTest extends IntegrationTestSupport {
+    @Autowired
+    private CreateCommunityBoardService createCommunityBoardService;
+    @Autowired
+    private CommunityBoardRepository communityBoardRepository;
+
+    @AfterEach
+    void tearDown() {
+        communityBoardRepository.deleteAllInBatch();
+    }
+
+    @DisplayName("커뮤니티에 게시글을 등록한다.")
+    @Test
+    void createCommunityWithDto() {
+        //given
+        CommunityBoardCreateRequestDto dto = CommunityBoardCreateRequestDto.builder()
+                .title("커뮤니티 테스트 제목")
+                .content("커뮤니티 테스트 내용")
+                .build();
+
+        UUID writerId = UUID.randomUUID();
+        String imgUrl = "https://image.test.url/123";
+
+        //when
+        Long communityId = createCommunityBoardService.createCommunityBoard(dto, writerId, imgUrl);
+
+        //then
+        Optional<CommunityBoard> communityBoard = communityBoardRepository.findById(communityId);
+
+        assertThat(communityBoard).isPresent();
+        assertThat(communityBoard.get().getId()).isEqualTo(communityId);
+        assertThat(communityBoard.get().getWriterId()).isEqualTo(writerId);
+        assertThat(communityBoard.get().getTitle()).isEqualTo(dto.title());
+        assertThat(communityBoard.get().getContent()).isEqualTo(dto.content());
+        assertThat(communityBoard.get().getImgUrl()).isEqualTo(imgUrl);
+    }
+
+    @DisplayName("커뮤니티 게시글을 이미지 링크 없이 등록할 시 빈 문자열을 저장한다.")
+    @Test
+    void createCommunityWithoutImgUrl() {
+        //given
+        CommunityBoardCreateRequestDto dto = CommunityBoardCreateRequestDto.builder()
+                .title("커뮤니티 테스트 제목")
+                .content("커뮤니티 테스트 내용")
+                .build();
+
+        UUID writerId = UUID.randomUUID();
+        String imgUrl = null;
+
+        //when
+        Long communityId = createCommunityBoardService.createCommunityBoard(dto, writerId, imgUrl);
+
+        //then
+        Optional<CommunityBoard> communityBoard = communityBoardRepository.findById(communityId);
+
+        assertThat(communityBoard).isPresent();
+        assertThat(communityBoard.get().getId()).isEqualTo(communityId);
+        assertThat(communityBoard.get().getWriterId()).isEqualTo(writerId);
+        assertThat(communityBoard.get().getTitle()).isEqualTo(dto.title());
+        assertThat(communityBoard.get().getContent()).isEqualTo(dto.content());
+        assertThat(communityBoard.get().getImgUrl()).isEmpty();
+    }
+}