feat: 로그아웃시 사용자 정보를 받기 위한 로그인 리졸버 추가 (#13)

src/main/java/com/backend/util/LoginUserArgumentResolver.java

@@ -0,0 +1,37 @@
+package com.backend.util;
+
+import com.backend.domain.auth.dto.Login;
+import com.backend.domain.auth.dto.LoginUser;
+import com.backend.error.ErrorCode;
+import com.backend.error.exception.custom.BusinessException;
+import org.springframework.core.MethodParameter;
+import org.springframework.security.core.Authentication;
+import org.springframework.security.core.context.SecurityContextHolder;
+import org.springframework.web.bind.support.WebDataBinderFactory;
+import org.springframework.web.context.request.NativeWebRequest;
+import org.springframework.web.method.support.HandlerMethodArgumentResolver;
+import org.springframework.web.method.support.ModelAndViewContainer;
+
+public class LoginUserArgumentResolver implements HandlerMethodArgumentResolver {
+    @Override
+    public boolean supportsParameter(MethodParameter parameter) {
+        boolean hasLoginAnnotation = parameter.hasParameterAnnotation(Login.class);
+        boolean hasLoginUserType = LoginUser.class.isAssignableFrom(parameter.getParameterType());
+
+        return hasLoginAnnotation && hasLoginUserType;
+    }
+
+    @Override
+    public Object resolveArgument(MethodParameter parameter, ModelAndViewContainer mavContainer,
+                                  NativeWebRequest webRequest, WebDataBinderFactory binderFactory) throws Exception {
+        Authentication authentication = SecurityContextHolder.getContext().getAuthentication();
+
+        if (authentication == null) {
+            throw new BusinessException(ErrorCode.USER_NOT_FOUND);
+        }
+
+        return LoginUser.builder()
+                .email(authentication.getName())
+                .build();
+    }
+}