Merge pull request #4 from OMZigak/feat/3

[feat] Api 공통 응답 형태

src/main/java/org/kkumulkkum/server/advice/ResponseDtoAdvice.java

@@ -0,0 +1,33 @@
+package org.kkumulkkum.server.advice;
+
+import org.kkumulkkum.server.dto.common.ResponseDto;
+import org.springframework.core.MethodParameter;
+import org.springframework.http.MediaType;
+import org.springframework.http.converter.HttpMessageConverter;
+import org.springframework.http.converter.json.MappingJackson2HttpMessageConverter;
+import org.springframework.http.server.ServerHttpRequest;
+import org.springframework.http.server.ServerHttpResponse;
+import org.springframework.web.bind.annotation.RestControllerAdvice;
+import org.springframework.web.servlet.mvc.method.annotation.ResponseBodyAdvice;
+
+@RestControllerAdvice(basePackages = "org.kkumulkkum.server")
+public class ResponseDtoAdvice implements ResponseBodyAdvice<Object> {
+    @Override
+    public boolean supports(MethodParameter returnType, Class<? extends HttpMessageConverter<?>> converterType) {
+        return !(returnType.getParameterType() == ResponseDto.class)
+                && MappingJackson2HttpMessageConverter.class.isAssignableFrom(converterType);
+    }
+
+    @Override
+    public Object beforeBodyWrite(
+            Object body,
+            MethodParameter returnType,
+            MediaType selectedContentType,
+            Class<? extends HttpMessageConverter<?>> selectedConverterType,
+            ServerHttpRequest request,
+            ServerHttpResponse response
+    ) {
+        // TODO: error 관련 처리 추가
+        return ResponseDto.success(body);
+    }
+}

src/main/java/org/kkumulkkum/server/controller/TestController.java

@@ -0,0 +1,22 @@
+package org.kkumulkkum.server.controller;
+
+import org.kkumulkkum.server.dto.test.TestDto;
+import org.springframework.http.ResponseEntity;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RestController;
+
+@RestController
+@RequestMapping("/api/v1")
+public class TestController {
+
+    @GetMapping("/test/void")
+    public ResponseEntity<Void> testVoid() {
+        return ResponseEntity.ok().build();
+    }
+
+    @GetMapping("/test/dto")
+    public ResponseEntity<TestDto> testDto() {
+        return ResponseEntity.ok(new TestDto("test"));
+    }
+}

src/main/java/org/kkumulkkum/server/dto/common/ErrorDto.java

@@ -0,0 +1,10 @@
+package org.kkumulkkum.server.dto.common;
+
+public record ErrorDto(
+        int code,
+        String message
+) {
+    public static ErrorDto of(int code, String message) {
+        return new ErrorDto(code, message);
+    }
+}

src/main/java/org/kkumulkkum/server/dto/common/ResponseDto.java

@@ -0,0 +1,14 @@
+package org.kkumulkkum.server.dto.common;
+
+public record ResponseDto<T> (
+        T data,
+        ErrorDto error
+) {
+    public static <T> ResponseDto<T> success(final T data) {
+        return new ResponseDto<>(data, null);
+    }
+
+    public static <T> ResponseDto<T> fail(ErrorDto error) {
+        return new ResponseDto<>(null, ErrorDto.of(error.code(), error.message()));
+    }
+}

src/main/java/org/kkumulkkum/server/dto/test/TestDto.java

@@ -0,0 +1,9 @@
+package org.kkumulkkum.server.dto.test;
+
+public record TestDto(
+        String test
+) {
+    public static TestDto of (String test) {
+        return new TestDto(test);
+    }
+}