package cn.home1.oss.lib.webmvc.internal;
   
   import static lombok.AccessLevel.PACKAGE;
   import static org.apache.commons.lang3.StringUtils.isNotBlank;
   import static org.springframework.http.HttpHeaders.ACCEPT;
   import static org.springframework.http.HttpMethod.DELETE;
   import static org.springframework.http.HttpMethod.POST;
   import static org.springframework.http.HttpMethod.PUT;
   import static org.springframework.http.MediaType.APPLICATION_JSON_VALUE;
  
  import cn.home1.oss.lib.webmvc.api.RequestResolver;
  
  import lombok.Getter;
  import lombok.Setter;
  import lombok.extern.slf4j.Slf4j;
  
  import org.springframework.http.HttpMethod;
  
  import javax.servlet.http.HttpServletRequest;
  
  /**
   * Created by zhanghaolun on 16/8/18.
   */
  @Getter
  @Setter(PACKAGE)
  @Slf4j
  public class DefaultRequestResolver implements RequestResolver {
  
    private String loginEndpoint;
  
    public DefaultRequestResolver(final String loginEndpoint) {
      this.loginEndpoint = loginEndpoint;
    }
  
    @Override
    public Boolean isLoginRequest(final HttpServletRequest request) {
      final String reqContextPath = request.getContextPath();
      final String contextPath = reqContextPath.endsWith("/") ? reqContextPath : reqContextPath + "/";
      final boolean isLoginRequest = request.getRequestURI().equals(contextPath + this.loginEndpoint);
  
      if (log.isTraceEnabled()) {
        log.trace("contextPath: {}, requestUri: {}, isLoginRequest: {}", //
          request.getContextPath(), request.getRequestURI(), isLoginRequest);
      }
      return isLoginRequest;
    }
  
    /**
     * TODO 进一步改进.
     */
    @Override
    public Boolean isAjaxRequest(final HttpServletRequest request) {
      final HttpMethod httpMethod = HttpMethod.valueOf(request.getMethod());
      // final String contentTypeHeader = request.getHeader(CONTENT_TYPE);
      // final String content = isNotBlank(contentTypeHeader) ? contentTypeHeader : "";
      final String acceptHeader = request.getHeader(ACCEPT);
      final String accept = isNotBlank(acceptHeader) ? acceptHeader : "";
      final String underscore = request.getParameter("_");
      final boolean result = POST == httpMethod || PUT == httpMethod || DELETE == httpMethod //
        || accept.contains(APPLICATION_JSON_VALUE) //
        || isNotBlank(underscore);
      return result;
    }
  }