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 freemarker.template.Template;
  import org.apache.commons.io.IOUtils;
  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.Response;
  import org.b3log.latke.http.renderer.AbstractFreeMarkerRenderer;
  import org.b3log.latke.http.renderer.TextHtmlRenderer;
  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.Option;
  import org.b3log.solo.service.DataModelService;
  import org.b3log.solo.service.OptionQueryService;
  import org.b3log.solo.util.Markdowns;
  import org.b3log.solo.util.Skins;
  import org.json.JSONObject;
  
  import java.io.InputStream;
  import java.nio.charset.StandardCharsets;
  import java.util.Map;
  
  /**
   * User template processor.
   *
   * <p>
   * User can add a template (for example "links.ftl") then visits the page ("links.html").
   * </p>
   *
   * @author <a href="http://88250.b3log.org">Liang Ding</a>
   * @version 2.0.0.1, Apr 18, 2020
   * @since 0.4.5
   */
  @Singleton
  public class UserTemplateProcessor {
  
      /**
       * Logger.
       */
      private static final Logger LOGGER = LogManager.getLogger(ArticleProcessor.class);
  
      /**
       * DataModelService.
       */
      @Inject
      private DataModelService dataModelService;
  
      /**
       * Language service.
       */
      @Inject
      private LangPropsService langPropsService;
  
      /**
       * Option query service.
       */
      @Inject
      private OptionQueryService optionQueryService;
  
      /**
       * Shows the user template page.
       *
       * @param context the specified context
       */
      public void showPage(final RequestContext context) {
          final String requestURI = context.requestURI();
          final String templateName = context.pathVar("name") + ".ftl";
          if ("/CHANGE_LOGS.html".equals(requestURI)) {
              try {
                  final TextHtmlRenderer renderer = new TextHtmlRenderer();
                  context.setRenderer(renderer);
                  try (final InputStream resourceAsStream = UserTemplateProcessor.class.getResourceAsStream("/CHANGE_LOGS.md")) {
                      final String content = IOUtils.toString(resourceAsStream, StandardCharsets.UTF_8);
                      renderer.setContent(Markdowns.toHTML(content));
                  }
              } catch (final Exception e) {
                  LOGGER.log(Level.ERROR, "Renders CHANGE_LOGS failed", e);
              }
              return;
          }
  
          LOGGER.log(Level.DEBUG, "Shows page [requestURI={}, templateName={}]", requestURI, templateName);
  
          final Request request = context.getRequest();
          final Response response = context.getResponse();
          final AbstractFreeMarkerRenderer renderer = new SkinRenderer(context, templateName);
  
          final Map<String, Object> dataModel = renderer.getDataModel();
          final Template template = Skins.getSkinTemplate(context, templateName);
          if (null == template) {
              context.sendError(404);
              return;
          }
  
          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);
              dataModelService.fillUserTemplate(context, template, dataModel, preference);
              Skins.fillLangs(preference.optString(Option.ID_C_LOCALE_STRING), (String) context.attr(Keys.TEMPLATE_DIR_NAME), dataModel);
          } catch (final Exception e) {
              LOGGER.log(Level.ERROR, e.getMessage(), e);
  
              context.sendError(404);
          }
      }
  }
  