[202002521 이경빈] feature/202002521

src/main/java/com/com/cnu/devlog_springboot/controller/ProjectController.java

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+package com.com.cnu.devlog_springboot.controller;
+
+import com.com.cnu.devlog_springboot.model.Project;
+import com.com.cnu.devlog_springboot.model.request.ProjectRequest;
+import com.com.cnu.devlog_springboot.service.ProjectService;
+import lombok.RequiredArgsConstructor;
+import org.springframework.http.ResponseEntity;
+import org.springframework.web.bind.annotation.*;
+
+import java.util.List;
+
+@RestController
+@RequestMapping("/projects")
+@RequiredArgsConstructor
+public class ProjectController {
+    private final ProjectService projectService;
+
+    // GET /projects
+    @GetMapping
+    public ResponseEntity<List<Project>> getProjects() {
+        return ResponseEntity.ok(projectService.getProjects());
+    }
+
+    // GET /projects/{projectId}
+    @GetMapping("{projectId}")
+    public ResponseEntity<Project> getProject(@PathVariable("projectId")Integer projectId) {
+        return ResponseEntity.ok(projectService.getProject(projectId));
+    }
+
+    // POST /projects
+    @PostMapping
+    public ResponseEntity<Project> createProject(@RequestBody final ProjectRequest request) {
+        return ResponseEntity.ok(projectService.createProject(request));
+    }
+
+    // PUT /projects/{projects}
+    // ex. localhost:8080/projects/3
+    @PutMapping("{projectId}")
+    public ResponseEntity<Project> updateProject(
+            @PathVariable("projectId") final Integer projectId,
+            @RequestBody final ProjectRequest request
+    ) {
+        final Project project = projectService.updateProject(projectId, request);
+        return ResponseEntity.ok(project);
+    }
+
+    // DELETE /projects/{projects}
+    @DeleteMapping("{projectId}")
+    public ResponseEntity<Void> deleteProject(@PathVariable("projectId") final Integer projectId) {
+        projectService.deleteProject(projectId);
+        return ResponseEntity.noContent().build();
+    }
+}

src/main/java/com/com/cnu/devlog_springboot/exception/DevlogException.java

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+package com.com.cnu.devlog_springboot.exception;
+
+import com.com.cnu.devlog_springboot.type.ErrorCode;
+import lombok.AllArgsConstructor;
+import lombok.Getter;
+
+@Getter
+@AllArgsConstructor
+public class DevlogException extends RuntimeException {
+    private final ErrorCode errorCode;
+}

src/main/java/com/com/cnu/devlog_springboot/exception/GlobalExecptionHandler.java

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+package com.com.cnu.devlog_springboot.exception;
+
+import com.com.cnu.devlog_springboot.model.response.ErrorResponse;
+import jakarta.servlet.http.HttpServletRequest;
+import org.springframework.http.ResponseEntity;
+import org.springframework.web.bind.annotation.ControllerAdvice;
+import org.springframework.web.bind.annotation.ExceptionHandler;
+
+@ControllerAdvice
+public class GlobalExecptionHandler {
+    @ExceptionHandler(DevlogException.class)
+    public ResponseEntity<ErrorResponse> handleDevlogException(
+            HttpServletRequest request, DevlogException e
+    ) {
+        return ResponseEntity.status(e.getErrorCode().getHttpStatus())
+                .body(
+                        new ErrorResponse(
+                                e.getErrorCode().getDescription(),
+                                e.getErrorCode().getHttpStatus().value(),
+                                e.getErrorCode().getErrorCode(),
+                                request.getRequestURI()
+                        )
+                );
+    }
+}

src/main/java/com/com/cnu/devlog_springboot/model/response/ErrorResponse.java

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+package com.com.cnu.devlog_springboot.model.response;
+
+public record ErrorResponse (
+        String title,
+        Integer status,
+        Integer code,
+        String instance
+) {}

src/main/java/com/com/cnu/devlog_springboot/repository/ProjectRepository.java

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+package com.com.cnu.devlog_springboot.repository;
+
+import com.com.cnu.devlog_springboot.model.Project;
+import org.springframework.data.jpa.repository.JpaRepository;
+import org.springframework.stereotype.Repository;
+
+@Repository
+public interface ProjectRepository extends JpaRepository<Project, Integer> {
+}

src/main/java/com/com/cnu/devlog_springboot/service/ProjectService.java

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+package com.com.cnu.devlog_springboot.service;
+
+import com.com.cnu.devlog_springboot.exception.DevlogException;
+import com.com.cnu.devlog_springboot.model.Project;
+import com.com.cnu.devlog_springboot.model.request.ProjectRequest;
+import com.com.cnu.devlog_springboot.repository.ProjectRepository;
+import com.com.cnu.devlog_springboot.type.ErrorCode;
+import lombok.RequiredArgsConstructor;
+import org.springframework.stereotype.Service;
+
+import java.util.List;
+
+@Service
+@RequiredArgsConstructor
+public class ProjectService {
+    private final ProjectRepository projectRepository;
+
+    public Project createProject(ProjectRequest projectRequest) {
+        return projectRepository.save(new Project(
+                null,
+                projectRequest.title(),
+                projectRequest.summary(),
+                projectRequest.contents(),
+                projectRequest.startDate(),
+                projectRequest.endDate()
+        ));
+    }
+
+    public List<Project> getProjects() {
+        return projectRepository.findAll();
+    }
+
+    public Project getProject(Integer projectId) {
+        return projectRepository.findById(projectId)
+                .orElseThrow(() -> new DevlogException(ErrorCode.PROJECT_NOT_FOUND));
+    }
+
+    public Project updateProject(Integer projectId, ProjectRequest projectRequest) {
+        return projectRepository.findById(projectId)
+                .map(project -> {
+                    project.setTitle(projectRequest.title());
+                    project.setContents(projectRequest.contents());
+                    project.setSummary(projectRequest.summary());
+                    project.setStartDate(projectRequest.startDate());
+                    project.setEndDate((projectRequest.endDate()));
+                    return projectRepository.save(project);
+                })
+                .orElseThrow(() -> new DevlogException(ErrorCode.PROJECT_NOT_FOUND));
+    }
+
+    public void deleteProject(Integer projectId) {
+        projectRepository.findById(projectId)
+                .ifPresent(projectRepository::delete);
+    }
+}

src/main/java/com/com/cnu/devlog_springboot/type/ErrorCode.java

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+package com.com.cnu.devlog_springboot.type;
+
+import lombok.Getter;
+import org.springframework.http.HttpStatus;
+
+@Getter
+public enum ErrorCode {
+    // 4XX
+    POST_NOT_FOUND(
+            HttpStatus.NOT_FOUND,
+            4000,
+            "해당 게시글을 찾을 수 없습니다."
+    ),
+    PROJECT_NOT_FOUND(
+            HttpStatus.NOT_FOUND,
+            4001,
+            "해당 프로젝트를 찾을 수 없습니다."
+    );
+
+    private final HttpStatus httpStatus;
+    private final Integer errorCode;
+    private final String description;
+
+    ErrorCode(HttpStatus httpStatus, Integer errorCode, String description) {
+        this.httpStatus = httpStatus;
+        this.errorCode = errorCode;
+        this.description = description;
+    }
+}