Docs: 중복 회원가입 예외 처리 (#92)

* Docs: 중복 회원가입 예외 처리

* Docs: SignUpException 생성

src/main/java/com/donkeys_today/server/support/dto/type/ErrorType.java

@@ -26,7 +26,7 @@ public enum ErrorType {
   WRONG_SIGNATURE_TOKEN(HttpStatus.UNAUTHORIZED.value(), "Signature가 잘못된 Token입니다."),
   INTERNAL_SERVER_ERROR(HttpStatus.INTERNAL_SERVER_ERROR.value(), "서버 오류"),
   INVALID_PLATFORM_TYPE(HttpStatus.INTERNAL_SERVER_ERROR.value(), "지원하지 않는 로그인 플랫폼입니다."),
-  DUPLICATED_USER_ERROR(HttpStatus.INTERNAL_SERVER_ERROR.value(), "이미 가입된 유저입니다."),
+  DUPLICATED_USER_ERROR(HttpStatus.BAD_REQUEST.value(), "이미 가입된 유저입니다."),
   NOTFOUND_USER_ERROR(HttpStatus.NOT_FOUND.value(), "존재하지 않는 유저 입니다."),
   UNABLE_TO_CREATE_APPLE_PUBLIC_KEY(HttpStatus.UNAUTHORIZED.value(), "애플 로그인 중 퍼블릭 키 생성에 문제가 발생했습니다."),
   /**

src/main/java/com/donkeys_today/server/support/exception/GlobalExceptionAdvice.java

@@ -1,8 +1,17 @@
 package com.donkeys_today.server.support.exception;
 
+import com.donkeys_today.server.support.dto.ApiResponse;
+import com.donkeys_today.server.support.exception.auth.SignUpException;
+import org.springframework.http.HttpStatus;
+import org.springframework.http.ResponseEntity;
+import org.springframework.web.bind.annotation.ExceptionHandler;
 import org.springframework.web.bind.annotation.RestControllerAdvice;
 
 @RestControllerAdvice
 public class GlobalExceptionAdvice {
 
+    @ExceptionHandler(SignUpException.class)
+    protected ResponseEntity<ApiResponse> SignUpException(SignUpException e) {
+        return ResponseEntity.status(HttpStatus.BAD_REQUEST).body(ApiResponse.error(e.getErrorType()));
+    }
 }

src/main/java/com/donkeys_today/server/support/exception/auth/SignUpException.java

@@ -0,0 +1,12 @@
+package com.donkeys_today.server.support.exception.auth;
+
+import com.donkeys_today.server.support.dto.type.ErrorType;
+import com.donkeys_today.server.support.exception.BusinessException;
+import lombok.Getter;
+
+public class SignUpException extends BusinessException {
+
+    public SignUpException(ErrorType errorType) {
+        super(errorType);
+    }
+}