feat: validation exceptionHandler 추가

server/api/src/main/kotlin/com/kw/api/common/dto/response/ErrorResponse.kt

@@ -2,5 +2,11 @@ package com.kw.api.common.dto.response
 
 class ErrorResponse(
     val code: String,
-    val message: String
-)
+    val message: String,
+    val validations: MutableMap<String, String> = mutableMapOf()
+) {
+    fun addValidation(key: String, value: String) {
+        validations[key] = value
+    }
+
+}

server/api/src/main/kotlin/com/kw/api/common/exception/CustomErrorCode.kt

@@ -8,10 +8,18 @@ enum class CustomErrorCode(
     val message: String
 ) {
 
+    // bundle
     FORBIDDEN_BUNDLE(HttpStatus.FORBIDDEN, "FORBIDDEN_BUNDLE", "비공개 꾸러미입니다."),
     NOT_FOUND_BUNDLE(HttpStatus.NOT_FOUND, "NOT_FOUND_BUNDLE", "존재하지 않는 꾸러미입니다."),
+
+    // question
     NOT_FOUND_QUESTION(HttpStatus.NOT_FOUND, "NOT_FOUND_QUESTION", "존재하지 않는 질문입니다."),
+    INCLUDE_NOT_FOUND_QUESTION(HttpStatus.NOT_FOUND, "INCLUDE_NOT_FOUND_QUESTION", "존재하지 않는 질문이 포함되어 있습니다."),
 
+    // tag
     INCLUDE_NOT_FOUND_TAG(HttpStatus.NOT_FOUND, "INCLUDE_NOT_FOUND_TAG", "존재하지 않는 태그가 포함되어 있습니다."),
-    INCLUDE_NOT_FOUND_QUESTION(HttpStatus.NOT_FOUND, "INCLUDE_NOT_FOUND_QUESTION", "존재하지 않는 질문이 포함되어 있습니다."),
+
+    // common
+    BAD_REQUEST(HttpStatus.BAD_REQUEST, "BAD_REQUEST", "잘못된 요청입니다."),
+
 }

server/api/src/main/kotlin/com/kw/api/common/exception/CustomExceptionHandler.kt

@@ -1,14 +1,46 @@
 package com.kw.api.common.exception
 
 import com.kw.api.common.dto.response.ErrorResponse
+import org.springframework.http.HttpHeaders
+import org.springframework.http.HttpStatusCode
 import org.springframework.http.ResponseEntity
+import org.springframework.http.converter.HttpMessageNotReadableException
+import org.springframework.web.bind.MethodArgumentNotValidException
 import org.springframework.web.bind.annotation.ExceptionHandler
 import org.springframework.web.bind.annotation.RestControllerAdvice
+import org.springframework.web.context.request.WebRequest
 import org.springframework.web.servlet.mvc.method.annotation.ResponseEntityExceptionHandler
 
 @RestControllerAdvice
 class CustomExceptionHandler : ResponseEntityExceptionHandler() {
 
+    override fun handleHttpMessageNotReadable(
+        ex: HttpMessageNotReadableException,
+        headers: HttpHeaders,
+        status: HttpStatusCode,
+        request: WebRequest
+    ): ResponseEntity<Any>? {
+        val errorCode = CustomErrorCode.BAD_REQUEST
+        val errorResponse = ErrorResponse(errorCode.code, errorCode.message)
+        return ResponseEntity.status(errorCode.status).body(errorResponse)
+    }
+
+    override fun handleMethodArgumentNotValid(
+        ex: MethodArgumentNotValidException,
+        headers: HttpHeaders,
+        status: HttpStatusCode,
+        request: WebRequest
+    ): ResponseEntity<Any>? {
+        val errorCode = CustomErrorCode.BAD_REQUEST
+        val errorResponse = ErrorResponse(errorCode.code, errorCode.message)
+
+        ex.bindingResult.fieldErrors.forEach {
+            errorResponse.addValidation(it.field, it.defaultMessage!!)
+        }
+
+        return ResponseEntity.status(errorCode.status).body(errorResponse)
+    }
+
     @ExceptionHandler(CustomException::class)
     protected fun handleCustomException(ex: CustomException): ResponseEntity<ErrorResponse> {
         return ResponseEntity.status(ex.getStatus()).body(ex.getErrorResponse())

server/api/src/main/kotlin/com/kw/api/domain/bundle/dto/request/BundleCreateRequest.kt

@@ -1,17 +1,17 @@
 package com.kw.api.domain.bundle.dto.request
 
 import com.kw.data.domain.bundle.Bundle
-import jakarta.validation.constraints.Max
 import jakarta.validation.constraints.NotBlank
+import jakarta.validation.constraints.Size
 
 data class BundleCreateRequest(
-    @NotBlank(message = "이름은 필수입니다.")
+    @field:NotBlank(message = "이름은 필수입니다.")
     val name: String,
 
-    @NotBlank(message = "공개 범위 설정은 필수입니다.")
+    @field:NotBlank(message = "공개 범위 설정은 필수입니다.")
     val shareType: String,
 
-    @Max(value = 3, message = "태그는 최대 3개까지 지정 가능합니다.")
+    @field:Size(max = 3, message = "태그는 최대 3개까지 지정 가능합니다.")
     val tagIds: List<Long>?
 ) {
     fun toEntity(): Bundle {

server/api/src/main/kotlin/com/kw/api/domain/bundle/dto/request/BundleQuestionAddRequest.kt

@@ -1,3 +1,8 @@
 package com.kw.api.domain.bundle.dto.request
 
-data class BundleQuestionAddRequest(val questionIds: List<Long>)
+import jakarta.validation.constraints.Size
+
+data class BundleQuestionAddRequest(
+    @field:Size(min = 1, message = "추가할 질문을 선택해 주세요.")
+    val questionIds: List<Long>
+)

server/api/src/main/kotlin/com/kw/api/domain/bundle/dto/request/BundleQuestionRemoveRequest.kt

@@ -1,3 +1,8 @@
 package com.kw.api.domain.bundle.dto.request
 
-data class BundleQuestionRemoveRequest(val questionIds: List<Long>)
+import jakarta.validation.constraints.Size
+
+data class BundleQuestionRemoveRequest(
+    @field:Size(min = 1, message = "삭제할 질문을 선택해 주세요.")
+    val questionIds: List<Long>
+)

server/api/src/main/kotlin/com/kw/api/domain/bundle/dto/request/BundleUpdateRequest.kt

@@ -1,15 +1,7 @@
 package com.kw.api.domain.bundle.dto.request
 
-import jakarta.validation.constraints.Max
-import jakarta.validation.constraints.NotBlank
-
 data class BundleUpdateRequest(
-    @NotBlank(message = "이름은 필수입니다.")
     val name: String?,
-
-    @NotBlank(message = "공개 범위 설정은 필수입니다.")
     val shareType: String?,
-
-    @Max(value = 3, message = "태그는 최대 3개까지 지정 가능합니다.")
     val tagIds: List<Long>?
 )

server/api/src/main/kotlin/com/kw/api/domain/question/controller/QuestionController.kt

@@ -18,7 +18,7 @@ class QuestionController(val questionService: QuestionService) {
 
     @ResponseStatus(HttpStatus.CREATED)
     @PostMapping("/questions")
-    fun createQuestion(@RequestBody request: QuestionCreateRequest): ApiResponse<QuestionResponse> {
+    fun createQuestion(@RequestBody @Valid request: QuestionCreateRequest): ApiResponse<QuestionResponse> {
         val response = questionService.createQuestion(request)
         return ApiResponse.created(response);
     }

server/api/src/main/kotlin/com/kw/api/domain/question/dto/request/QuestionCreateRequest.kt

@@ -3,20 +3,18 @@ package com.kw.api.domain.question.dto.request
 import com.kw.data.domain.bundle.Bundle
 import com.kw.data.domain.question.Question
 import jakarta.validation.constraints.NotBlank
-import jakarta.validation.constraints.NotNull
 
 data class QuestionCreateRequest(
-    @NotBlank(message = "내용은 필수입니다.")
+    @field:NotBlank(message = "내용은 필수입니다.")
     val content: String,
 
     val answer: String?,
 
-    @NotBlank(message = "답변 공개 범위 설정은 필수입니다.")
+    @field:NotBlank(message = "답변 공개 범위 설정은 필수입니다.")
     val answerShareStatus: String,
 
     val tagIds: List<Long>?,
 
-    @NotNull(message = "꾸러미 선택은 필수입니다.")
     val bundleId: Long
 ) {
     fun toEntity(bundle: Bundle): Question {