content: /*
   * Solo - A small and beautiful blogging system written in Java.
   * Copyright (c) 2010-present, b3log.org
   *
   * Solo is licensed under Mulan PSL v2.
   * You can use this software according to the terms and conditions of the Mulan PSL v2.
   * You may obtain a copy of Mulan PSL v2 at:
   *         http://license.coscl.org.cn/MulanPSL2
   * THIS SOFTWARE IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OF ANY KIND, EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO NON-INFRINGEMENT, MERCHANTABILITY OR FIT FOR A PARTICULAR PURPOSE.
   * See the Mulan PSL v2 for more details.
   */
  package org.b3log.solo.processor;
  
  import org.apache.commons.lang3.StringUtils;
  import org.apache.logging.log4j.Level;
  import org.apache.logging.log4j.LogManager;
  import org.apache.logging.log4j.Logger;
  import org.b3log.latke.Keys;
  import org.b3log.latke.http.Request;
  import org.b3log.latke.http.RequestContext;
  import org.b3log.latke.http.renderer.AbstractFreeMarkerRenderer;
  import org.b3log.latke.ioc.Inject;
  import org.b3log.latke.ioc.Singleton;
  import org.b3log.latke.service.LangPropsService;
  import org.b3log.latke.util.Locales;
  import org.b3log.solo.model.Common;
  import org.b3log.solo.service.DataModelService;
  import org.b3log.solo.service.OptionQueryService;
  import org.b3log.solo.service.UserQueryService;
  import org.b3log.solo.util.Solos;
  import org.b3log.solo.util.StatusCodes;
  import org.json.JSONObject;
  
  import java.util.Map;
  
  /**
   * Error processor.
   *
   * @author <a href="http://88250.b3log.org">Liang Ding</a>
   * @version 2.0.0.1, Jun 19, 2020
   * @since 0.4.5
   */
  @Singleton
  public class ErrorProcessor {
  
      /**
       * Logger.
       */
      private static final Logger LOGGER = LogManager.getLogger(ArticleProcessor.class);
  
      /**
       * DataModelService.
       */
      @Inject
      private DataModelService dataModelService;
  
      /**
       * Option query service.
       */
      @Inject
      private OptionQueryService optionQueryService;
  
      /**
       * User query service.
       */
      @Inject
      private UserQueryService userQueryService;
  
      /**
       * Language service.
       */
      @Inject
      private LangPropsService langPropsService;
  
      /**
       * Handles the error.
       *
       * @param context the specified context
       * @throws Exception exception
       */
      public void showErrorPage(final RequestContext context) {
          final Request request = context.getRequest();
          final String statusCode = context.pathVar("statusCode");
          if (StringUtils.equals("GET", context.method())) {
              final String requestURI = context.requestURI();
              final String templateName = statusCode + ".ftl";
              LOGGER.log(Level.TRACE, "Shows error page [requestURI={}, templateName={}]", requestURI, templateName);
  
              final AbstractFreeMarkerRenderer renderer = new SkinRenderer(context, "error/" + templateName);
              final Map<String, Object> dataModel = renderer.getDataModel();
              try {
                  final Map<String, String> langs = langPropsService.getAll(Locales.getLocale(request));
                  dataModel.putAll(langs);
                  final JSONObject preference = optionQueryService.getPreference();
                  dataModelService.fillCommon(context, dataModel, preference);
                  dataModelService.fillFaviconURL(dataModel, preference);
                  dataModelService.fillUsite(dataModel);
                  final String msg = (String) context.attr(Keys.MSG);
                  dataModel.put(Keys.MSG, msg);
                  dataModel.put(Common.LOGIN_URL, userQueryService.getLoginURL(Common.ADMIN_INDEX_URI));
              } catch (final Exception e) {
                  LOGGER.log(Level.ERROR, "Shows error page failed", e);
              }
  
              Solos.addGoogleNoIndex(context);
          } else {
              context.renderJSON(StatusCodes.ERR).renderMsg(statusCode);
          }
      }
  }
  