feat(UserInfo): 엑세스 토큰으로 만들어진 SCH의 Authentication으로부터 userId와 role 조회

Author: m-a-king

src/main/java/com/somemore/auth/controller/UserInfoQueryController.java

@@ -0,0 +1,35 @@
+package com.somemore.auth.controller;
+
+import com.somemore.auth.dto.UserInfoResponseDto;
+import com.somemore.global.common.response.ApiResponse;
+import com.somemore.global.exception.BadRequestException;
+import lombok.RequiredArgsConstructor;
+import org.springframework.security.core.Authentication;
+import org.springframework.security.core.GrantedAuthority;
+import org.springframework.security.core.context.SecurityContextHolder;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RestController;
+
+import static com.somemore.global.exception.ExceptionMessage.INVALID_TOKEN;
+
+@RestController
+@RequiredArgsConstructor
+@RequestMapping("/api/token")
+public class UserInfoQueryController {
+
+    @GetMapping("/userinfo")
+    public ApiResponse<UserInfoResponseDto> getUserInfoBySCH() {
+        Authentication authentication = SecurityContextHolder.getContext().getAuthentication();
+
+        String userId = authentication.getPrincipal().toString();
+        String role = authentication.getAuthorities().stream()
+                .findFirst()
+                .map(GrantedAuthority::getAuthority)
+                .orElseThrow(() -> new BadRequestException(INVALID_TOKEN));
+
+        return ApiResponse.ok(200,
+                new UserInfoResponseDto(userId, role),
+                "유저 정보 응답 성공");
+    }
+}

src/main/java/com/somemore/auth/dto/UserInfoResponseDto.java

@@ -0,0 +1,16 @@
+package com.somemore.auth.dto;
+
+import com.fasterxml.jackson.annotation.JsonProperty;
+import io.swagger.v3.oas.annotations.media.Schema;
+
+@Schema(description = "유저 정보 DTO")
+public record UserInfoResponseDto(
+        @JsonProperty("USER_ID")
+        @Schema(description = "유저 ID")
+        String userId,
+
+        @JsonProperty("ROLE")
+        @Schema(description = "유저 ROLE")
+        String role
+) {
+}

src/main/java/com/somemore/global/exception/ExceptionMessage.java

@@ -8,6 +8,7 @@
 @Getter
 public enum ExceptionMessage {
 
+    INVALID_TOKEN("잘못된 엑세스 토큰입니다"),
     NOT_EXISTS_CENTER("존재하지 않는 기관입니다."),
     NOT_EXISTS_COMMUNITY_BOARD("존재하지 않는 게시글입니다."),
     UNAUTHORIZED_COMMUNITY_BOARD("해당 게시글에 권한이 없습니다."),