content: /*
   * This library is part of OpenCms -
   * the Open Source Content Management System
   *
   * Copyright (c) Alkacon Software GmbH & Co. KG (https://www.alkacon.com)
   *
   * This library is free software; you can redistribute it and/or
   * modify it under the terms of the GNU Lesser General Public
   * License as published by the Free Software Foundation; either
   * version 2.1 of the License, or (at your option) any later version.
   *
   * This library is distributed in the hope that it will be useful,
   * but WITHOUT ANY WARRANTY; without even the implied warranty of
   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
   * Lesser General Public License for more details.
   *
   * For further information about Alkacon Software, please see the
   * company website: https://www.alkacon.com
   *
   * For further information about OpenCms, please see the
   * project website: https://www.opencms.org
   *
   * You should have received a copy of the GNU Lesser General Public
   * License along with this library; if not, write to the Free Software
   * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
   */
  
  package org.opencms.i18n;
  
  import org.opencms.file.CmsObject;
  import org.opencms.file.CmsProject;
  import org.opencms.file.CmsPropertyDefinition;
  import org.opencms.file.CmsResource;
  import org.opencms.file.CmsResourceFilter;
  import org.opencms.file.CmsUser;
  import org.opencms.main.CmsException;
  import org.opencms.main.CmsLog;
  import org.opencms.main.OpenCms;
  import org.opencms.site.CmsSite;
  import org.opencms.util.CmsStringUtil;
  
  import java.util.Locale;
  
  import javax.servlet.http.HttpServletRequest;
  
  import org.apache.commons.logging.Log;
  
  /**
   * Advanced locale handler allowing single tree localization.<p>
   */
  public class CmsSingleTreeLocaleHandler extends CmsDefaultLocaleHandler {
  
      /** The log object for this class. */
      private static final Log LOG = CmsLog.getLog(CmsSingleTreeLocaleHandler.class);
  
      /** A cms object that has been initialized with Admin permissions. */
      private CmsObject m_adminCmsObject;
  
      /**
       * Reads the locale from the first path element.<p>
       *
       * @param sitePath the site path with the locale prefix
       *
       * @return the locale or <code>null</code> if no matching locale was found
       */
      public static Locale getLocaleFromPath(String sitePath) {
  
          Locale result = null;
          if (sitePath.indexOf("/") == 0) {
              sitePath = sitePath.substring(1);
          }
          if (sitePath.length() > 1) {
              String localePrefix;
              if (!sitePath.contains("/")) {
                  // this may be the case for paths pointing to the root folder of a site
                  // check for parameters
                  int separator = -1;
                  int param = sitePath.indexOf("?");
                  int hash = sitePath.indexOf("#");
                  if (param >= 0) {
                      if (hash != 0) {
                          separator = param < hash ? param : hash;
                      } else {
                          separator = param;
                      }
                  } else {
                      separator = hash;
                  }
                  if (separator >= 0) {
                      localePrefix = sitePath.substring(0, separator);
                  } else {
                      localePrefix = sitePath;
                  }
              } else {
                  localePrefix = sitePath.substring(0, sitePath.indexOf("/"));
              }
              Locale locale = CmsLocaleManager.getLocale(localePrefix);
              if (localePrefix.equals(locale.toString())
                  && OpenCms.getLocaleManager().getAvailableLocales().contains(locale)) {
                  result = locale;
              }
          }
          return result;
      }
  
      /**
       * @see org.opencms.i18n.CmsDefaultLocaleHandler#getI18nInfo(javax.servlet.http.HttpServletRequest, org.opencms.file.CmsUser, org.opencms.file.CmsProject, java.lang.String)
       */
      @Override
      public CmsI18nInfo getI18nInfo(HttpServletRequest req, CmsUser user, CmsProject project, String resourceName) {
  
          CmsSite site = OpenCms.getSiteManager().getSiteForRootPath(resourceName);
          if ((site != null) && CmsSite.LocalizationMode.singleTree.equals(site.getLocalizationMode())) {
  
              String sitePath = resourceName.substring(site.getSiteRoot().length());
              if (sitePath.startsWith("/")) {
                  sitePath = sitePath.substring(1);
              }
              Locale locale = getLocaleFromPath(sitePath);
  
              if (locale == null) {
                  return super.getI18nInfo(req, user, project, resourceName);
              }
  
              sitePath = sitePath.substring(locale.toString().length());
              String encoding = null;
              resourceName = CmsStringUtil.joinPaths(site.getSiteRoot(), sitePath);
              CmsObject adminCms = null;
              try {
                  // create a copy of the Admin context to avoid concurrent modification
                  adminCms = OpenCms.initCmsObject(m_adminCmsObject);
              } catch (CmsException e) {
                  // unable to copy Admin context - this should never happen
              }
  
              if (adminCms != null) {
  
                  // must switch project id in stored Admin context to match current project
                  adminCms.getRequestContext().setCurrentProject(project);
                  adminCms.getRequestContext().setUri(resourceName);
  
                  // now get default m_locale names
                  CmsResource res = null;
                  try {
                      res = adminCms.readResource(resourceName, CmsResourceFilter.IGNORE_EXPIRATION);
                  } catch (CmsException e) {
                      // unable to read the resource - maybe we need the init handlers
                  }
                  if (res == null) {
                      try {
                          res = OpenCms.initResource(adminCms, resourceName, req, null);
                      } catch (CmsException e) {
                          // ignore
                      }
                  }
  
                  if (res != null) {
                      // get the encoding
                      try {
                          encoding = adminCms.readPropertyObject(
                              res,
                              CmsPropertyDefinition.PROPERTY_CONTENT_ENCODING,
                              true).getValue(OpenCms.getSystemInfo().getDefaultEncoding());
                      } catch (CmsException e) {
                          if (LOG.isInfoEnabled()) {
                              LOG.info(
                                  Messages.get().getBundle().key(Messages.ERR_READ_ENCODING_PROP_1, resourceName),
                                  e);
                          }
                      }
                  }
                  if (encoding == null) {
                      // no special encoding could be determined
                      encoding = OpenCms.getSystemInfo().getDefaultEncoding();
                  }
                  return new CmsI18nInfo(locale, encoding);
              }
          }
          return super.getI18nInfo(req, user, project, resourceName);
      }
  
      /**
       * @see org.opencms.i18n.I_CmsLocaleHandler#initHandler(org.opencms.file.CmsObject)
       */
      @Override
      public void initHandler(CmsObject cms) {
  
          m_adminCmsObject = cms;
          super.initHandler(cms);
      }
  }
  