2주차과제 - SpringWeb ToDo REST API

app/build.gradle

@@ -36,6 +36,9 @@ dependencies {
 
     // Spring Web
     implementation 'org.springframework.boot:spring-boot-starter-web'
+
+    // Spring devtools
+    developmentOnly "org.springframework.boot:spring-boot-devtools"
 }
 
 application {

app/src/main/java/com/codesoom/assignment/application/TaskService.java

@@ -0,0 +1,40 @@
+package com.codesoom.assignment.application;
+
+import com.codesoom.assignment.exception.custom.TaskNotFound;
+import com.codesoom.assignment.models.domain.Task;
+import com.codesoom.assignment.models.request.TaskCreate;
+import com.codesoom.assignment.models.request.TaskEdit;
+import com.codesoom.assignment.repository.TaskRepository;
+import org.springframework.stereotype.Service;
+
+import java.util.List;
+
+@Service
+public class TaskService {
+    private final TaskRepository taskRepository;
+
+    public TaskService(TaskRepository taskRepository) {
+        this.taskRepository = taskRepository;
+    }
+
+    public Task createTask(TaskCreate task) {
+        return taskRepository.save(task.toTask());
+    }
+
+    public List<Task> getTaskList() {
+        return taskRepository.findAll();
+    }
+
+    public Task getTask(Long id) {
+        return taskRepository.findById(id).orElseThrow(TaskNotFound::new);
+    }
+
+    public void deleteTask(Long id) {
+        Task task = taskRepository.findById(id).orElseThrow(TaskNotFound::new);
+        taskRepository.delete(task);
+    }
+
+    public Task updateTask(TaskEdit task) {
+        return taskRepository.update(task.toTask());
+    }
+}

app/src/main/java/com/codesoom/assignment/controllers/ExceptionController.java

@@ -0,0 +1,36 @@
+package com.codesoom.assignment.controllers;
+
+import com.codesoom.assignment.exception.CustomBaseException;
+import com.codesoom.assignment.models.response.ErrorResponse;
+import org.springframework.http.ResponseEntity;
+import org.springframework.web.bind.annotation.ControllerAdvice;
+import org.springframework.web.bind.annotation.ExceptionHandler;
+import org.springframework.web.bind.annotation.ResponseBody;
+
+/**
+ * 예외 처리를 담당합니다.
+ */
+@ControllerAdvice
+public class ExceptionController {
+
+    @ExceptionHandler(CustomBaseException.class)
+    @ResponseBody
+    public ResponseEntity<ErrorResponse> CustomBaseExceptionHandler(CustomBaseException e) {
+        return sendError(e);
+    }
+
+    private ResponseEntity<ErrorResponse> sendError(CustomBaseException e) {
+        ErrorResponse errorResponse = parseErrorResponse(e);
+        return  parseErrorResponseEntity(e, errorResponse);
+    }
+
+    private ResponseEntity<ErrorResponse> parseErrorResponseEntity(CustomBaseException e, ErrorResponse errorResponse) {
+        return ResponseEntity.status(e.getStatusCode()).body(errorResponse);
+    }
+
+    private ErrorResponse parseErrorResponse(CustomBaseException e) {
+        ErrorResponse errorResponse = new ErrorResponse(String.valueOf(e.getStatusCode()), e.getMessage(), e.validation);
+        return errorResponse;
+    }
+
+}

app/src/main/java/com/codesoom/assignment/controllers/TaskController.java

@@ -0,0 +1,53 @@
+package com.codesoom.assignment.controllers;
+
+import com.codesoom.assignment.application.TaskService;
+import com.codesoom.assignment.models.domain.Task;
+import com.codesoom.assignment.models.request.TaskCreate;
+import com.codesoom.assignment.models.request.TaskEdit;
+import org.springframework.http.HttpStatus;
+import org.springframework.http.ResponseEntity;
+import org.springframework.web.bind.annotation.*;
+
+import java.util.List;
+
+@CrossOrigin
+@RestController
+public class TaskController {
+    private final TaskService taskService;
+
+    public TaskController(TaskService taskService) {
+        this.taskService = taskService;
+    }
+
+    @GetMapping("/tasks")
+    public List<Task> list() {
+        return taskService.getTaskList();
+    }
+
+    @GetMapping("/tasks/{id}")
+    public Task detail(@PathVariable Long id) {
+        return taskService.getTask(id);
+    }
+
+    @PostMapping("/tasks")
+    public ResponseEntity<Task> create(@RequestBody TaskCreate taskCreate) {
+        taskCreate.validate();
+        Task task = taskService.createTask(taskCreate);
+        return ResponseEntity.status(HttpStatus.CREATED).body(task);
+    }
+
+    @RequestMapping(value = "/tasks/{id}", method = {RequestMethod.PUT, RequestMethod.PATCH})
+    public Task update(@PathVariable Long id,@RequestBody TaskEdit task) {
+        task.setId(id);
+        return taskService.updateTask(task);
+    }
+
+    @DeleteMapping("/tasks/{id}")
+    public ResponseEntity<Void> delete(@PathVariable Long id) {
+        if(id == null) {
+            return ResponseEntity.notFound().build();
+        }
+        taskService.deleteTask(id);
+        return ResponseEntity.noContent().build();
+    }
+}

app/src/main/java/com/codesoom/assignment/exception/CustomBaseException.java

@@ -0,0 +1,24 @@
+package com.codesoom.assignment.exception;
+
+import java.util.HashMap;
+import java.util.Map;
+
+/**
+ * 사용자정의 예외의 추상클래스 특정 필드의 유효성 검증 실패 정보를 저장하고, HTTP 상태 코드를 반환합니다.
+ */
+public abstract class CustomBaseException extends RuntimeException {
+    public final Map<String, String> validation = new HashMap<>();
+
+    public CustomBaseException() {
+    }
+
+    public CustomBaseException(String message) {
+        super(message);
+    }
+
+    public abstract int getStatusCode();
+
+    public void addValidation(String fieldName, String message) {
+        validation.put(fieldName, message);
+    }
+}

app/src/main/java/com/codesoom/assignment/exception/custom/InvalidTaskRequest.java

@@ -0,0 +1,21 @@
+package com.codesoom.assignment.exception.custom;
+
+import com.codesoom.assignment.exception.CustomBaseException;
+
+public class InvalidTaskRequest extends CustomBaseException {
+    private static final String MESSAGE = "할 일 생성 요청이 올바르지 않습니다.";
+
+    public InvalidTaskRequest() {
+        super(MESSAGE);
+    }
+
+    public InvalidTaskRequest(String fieldName, String message) {
+        super(MESSAGE);
+        addValidation(fieldName,message);
+    }
+
+    @Override
+    public int getStatusCode() {
+        return 400;
+    }
+}

app/src/main/java/com/codesoom/assignment/exception/custom/TaskNotFound.java

@@ -0,0 +1,16 @@
+package com.codesoom.assignment.exception.custom;
+
+import com.codesoom.assignment.exception.CustomBaseException;
+
+public class TaskNotFound extends CustomBaseException {
+    private static final String MESSAGE = "존재하지 않는 할 일 입니다.";
+
+    public TaskNotFound() {
+        super(MESSAGE);
+    }
+
+    @Override
+    public int getStatusCode() {
+        return 404;
+    }
+}

app/src/main/java/com/codesoom/assignment/models/domain/Task.java

@@ -0,0 +1,27 @@
+package com.codesoom.assignment.models.domain;
+
+/**
+ * 할 일 객체
+ */
+public class Task {
+    private Long id;
+    private String title;
+
+    public Task(Long id, String title) {
+        this.id = id;
+        this.title = title;
+    }
+
+    public Long getId() {
+        return id;
+    }
+
+    public String getTitle() {
+        return title;
+    }
+
+    public void changeTitle(String title) {
+        this.title = title;
+    }
+
+}

app/src/main/java/com/codesoom/assignment/models/request/TaskCreate.java

@@ -0,0 +1,42 @@
+package com.codesoom.assignment.models.request;
+
+import com.codesoom.assignment.exception.custom.InvalidTaskRequest;
+import com.codesoom.assignment.models.domain.Task;
+import org.springframework.util.StringUtils;
+
+public class TaskCreate {
+
+    private Long id;
+
+    private String title;
+
+    public TaskCreate(Long id, String title) {
+        this.id = id;
+        this.title = title;
+    }
+
+    public Long getId() {
+        return id;
+    }
+
+    public void setId(Long id) {
+        this.id = id;
+    }
+
+    public String getTitle() {
+        return title;
+    }
+
+    public void setTitle(String title) {
+        this.title = title;
+    }
+
+    public void validate() {
+        if (!StringUtils.hasText(this.title)) {
+            throw new InvalidTaskRequest("title","title 은 필수값 입니다.");
+        }
+    }
+    public Task toTask() {
+        return new Task(this.id,this.title);
+    }
+}

app/src/main/java/com/codesoom/assignment/models/request/TaskEdit.java

@@ -0,0 +1,34 @@
+package com.codesoom.assignment.models.request;
+
+import com.codesoom.assignment.models.domain.Task;
+
+public class TaskEdit {
+    private Long id;
+
+    private String title;
+
+    public TaskEdit(Long id, String title) {
+        this.id = id;
+        this.title = title;
+    }
+
+    public Long getId() {
+        return id;
+    }
+
+    public void setId(Long id) {
+        this.id = id;
+    }
+
+    public String getTitle() {
+        return title;
+    }
+
+    public void setTitle(String title) {
+        this.title = title;
+    }
+
+    public Task toTask() {
+        return new Task(this.id,this.title);
+    }
+}

app/src/main/java/com/codesoom/assignment/models/response/ErrorResponse.java

@@ -0,0 +1,52 @@
+package com.codesoom.assignment.models.response;
+
+import java.util.HashMap;
+import java.util.Map;
+
+/**
+ * 에러 반환 응답 객체
+ */
+public class ErrorResponse {
+    private String code;
+    private String message;
+    private Map<String, String> validation;
+
+    public ErrorResponse(String code, String message, Map<String, String> validation) {
+        this.code = code;
+        this.message = message;
+        this.validation = validation != null ? validation : new HashMap<>();
+    }
+
+    public void addValidation(String field, String message) {
+        validation.put(field, message);
+    }
+
+    public String getCode() {
+        return code;
+    }
+
+    public String getMessage() {
+        return message;
+    }
+
+    public Map<String, String> getValidation() {
+        return validation;
+    }
+
+    public void setCode(String code) {
+        this.code = code;
+    }
+
+    public void setMessage(String message) {
+        this.message = message;
+    }
+
+    public void setValidation(Map<String, String> validation) {
+        this.validation = validation;
+    }
+
+    @Override
+    public String toString() {
+        return String.format("code: %s, message: %s, validation: %s", code, message, validation);
+    }
+}

app/src/main/java/com/codesoom/assignment/repository/TaskRepository.java

@@ -0,0 +1,19 @@
+package com.codesoom.assignment.repository;
+
+import com.codesoom.assignment.models.domain.Task;
+
+import java.util.List;
+import java.util.Optional;
+
+public interface TaskRepository {
+
+    Task save(Task task);
+
+    List<Task> findAll();
+
+    Optional<Task> findById(Long id);
+
+    void delete(Task task);
+
+    Task update(Task task);
+}