MOSU-341 refactor: OAuth 관련 에러 공통화

Author: wlgns12370

src/main/java/life/mosu/mosuserver/global/handler/OAuth2LoginFailureHandler.java

@@ -6,7 +6,6 @@
 import jakarta.servlet.http.HttpServletResponse;
 import java.io.IOException;
 import java.nio.charset.StandardCharsets;
-import life.mosu.mosuserver.presentation.auth.dto.request.LoginResponse;
 import lombok.RequiredArgsConstructor;
 import lombok.extern.slf4j.Slf4j;
 import org.springframework.security.core.AuthenticationException;
@@ -27,8 +26,11 @@ public class OAuth2LoginFailureHandler implements
     public void onAuthenticationFailure(HttpServletRequest request, HttpServletResponse response,
             AuthenticationException exception) throws IOException, ServletException {
 
-        LoginResponse loginResponse = LoginResponse.from();
-        String jsonResponse = UriUtils.encode(objectMapper.writeValueAsString(loginResponse),
+        OAuthErrorType errorType = OAuthErrorType.from(exception.getMessage());
+        OAuthFailureResponse oAuthFailureResponse = OAuthFailureResponse.from(
+                errorType.getMessage());
+
+        String jsonResponse = UriUtils.encode(objectMapper.writeValueAsString(oAuthFailureResponse),
                 StandardCharsets.UTF_8);
 
         final String redirectWithAccessToken = UriComponentsBuilder.fromUriString(

src/main/java/life/mosu/mosuserver/global/handler/OAuthErrorType.java

@@ -0,0 +1,27 @@
+package life.mosu.mosuserver.global.handler;
+
+import lombok.Getter;
+
+@Getter
+public enum OAuthErrorType {
+    CANCELED("CANCELED"),
+    DUPLICATE("DUPLICATE"),
+    UNKNOWN("UNKNOWN");
+
+    private final String message;
+
+    OAuthErrorType(String message) {
+        this.message = message;
+    }
+
+    public static OAuthErrorType from(String text) {
+        if (text == null) {
+            return UNKNOWN;
+        }
+        return switch (text) {
+            case "DUPLICATE" -> DUPLICATE;
+            case "[access_denied] User denied access" -> CANCELED;
+            default -> UNKNOWN;
+        };
+    }
+}

src/main/java/life/mosu/mosuserver/global/handler/OAuthFailureResponse.java

@@ -0,0 +1,11 @@
+package life.mosu.mosuserver.global.handler;
+
+public record OAuthFailureResponse(
+        Boolean isProfileRegistered,
+        String errorCode
+) {
+
+    public static OAuthFailureResponse from(String errorCode) {
+        return new OAuthFailureResponse(null, errorCode);
+    }
+}

src/main/java/life/mosu/mosuserver/presentation/auth/dto/request/LoginResponse.java

@@ -21,8 +21,4 @@ public static LoginResponse from(Boolean isProfileRegistered, final UserJpaEntit
         }
         return new LoginResponse(false, LoginUserResponse.from(user));
     }
-
-    public static LoginResponse from() {
-        return new LoginResponse(null, null);
-    }
 }