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.ui.actions;
  
  import org.opencms.file.CmsObject;
  import org.opencms.file.CmsResource;
  import org.opencms.file.CmsResourceFilter;
  import org.opencms.main.CmsException;
  import org.opencms.main.CmsLog;
  import org.opencms.relations.CmsRelation;
  import org.opencms.relations.CmsRelationFilter;
  import org.opencms.relations.CmsRelationType;
  import org.opencms.ui.I_CmsDialogContext;
  import org.opencms.ui.Messages;
  import org.opencms.ui.contextmenu.CmsMenuItemVisibilityMode;
  import org.opencms.ui.contextmenu.CmsMenuItemVisibilitySingleOnly;
  import org.opencms.ui.contextmenu.CmsStandardVisibilityCheck;
  import org.opencms.ui.contextmenu.I_CmsHasMenuItemVisibility;
  import org.opencms.ui.sitemap.CmsUnlinkDialog;
  
  import java.util.List;
  
  import org.apache.commons.logging.Log;
  
  /**
   * Workplace action for the 'Link locale variant' dialog.<p>
   */
  public class CmsUnlinkLocaleVariantAction extends A_CmsWorkplaceAction {
  
      /** The action id. */
      public static final String ACTION_ID = "unlinklocale";
  
      /** The action visibility. */
      public static final I_CmsHasMenuItemVisibility VISIBILITY = new CmsMenuItemVisibilitySingleOnly(
          CmsStandardVisibilityCheck.DEFAULT_DEFAULTFILE);
  
      /** Logger instance for this class. */
      private static final Log LOG = CmsLog.getLog(CmsUnlinkLocaleVariantAction.class);
  
      /**
       * @see org.opencms.ui.actions.I_CmsWorkplaceAction#executeAction(org.opencms.ui.I_CmsDialogContext)
       */
      public void executeAction(final I_CmsDialogContext context) {
  
          try {
              final CmsResource resource = context.getResources().get(0);
              CmsObject cms = context.getCms();
              List<CmsRelation> relations = readOutgoingRelations(cms, resource);
              for (CmsRelation relation : relations) {
                  try {
                      CmsResource target = relation.getTarget(cms, CmsResourceFilter.IGNORE_EXPIRATION);
                      CmsUnlinkDialog unlinkDialog = new CmsUnlinkDialog(context, target);
                      openDialog(unlinkDialog, context);
                      break;
                  } catch (CmsException e) {
                      LOG.info("No target found for: " + relation, e);
                  }
              }
          } catch (Exception e) {
              LOG.error(e.getLocalizedMessage(), e);
              context.error(e);
          }
      }
  
      /**
       * @see org.opencms.ui.actions.I_CmsWorkplaceAction#getId()
       */
      public String getId() {
  
          return ACTION_ID;
      }
  
      /**
       * @see org.opencms.ui.actions.A_CmsWorkplaceAction#getTitleKey()
       */
      @Override
      public String getTitleKey() {
  
          return Messages.GUI_LOCALECOMPARE_UNLINK_LOCALE_VARIANT_0;
      }
  
      /**
       * @see org.opencms.ui.contextmenu.I_CmsHasMenuItemVisibility#getVisibility(org.opencms.file.CmsObject, java.util.List)
       */
      public CmsMenuItemVisibilityMode getVisibility(CmsObject cms, List<CmsResource> resources) {
  
          CmsMenuItemVisibilityMode visibility = VISIBILITY.getVisibility(cms, resources);
          if (visibility.isInVisible() || visibility.isInActive()) {
              return visibility;
          }
          try {
              List<CmsRelation> relations = readOutgoingRelations(cms, resources.get(0));
              boolean hasRelations = false;
              for (CmsRelation relation : relations) {
                  if (!relation.getTargetId().isNullUUID()) {
                      hasRelations = true;
                      break;
                  }
              }
              return hasRelations
              ? CmsMenuItemVisibilityMode.VISIBILITY_ACTIVE
              : CmsMenuItemVisibilityMode.VISIBILITY_INVISIBLE;
          } catch (CmsException e) {
              LOG.error(e.getLocalizedMessage(), e);
              return CmsMenuItemVisibilityMode.VISIBILITY_INVISIBLE;
          }
      }
  
      /**
       * Reads the outgoing LOCALE_VARIANT relations for a given resource.<p>
       *
       * @param cms the CMS context
       * @param resource the resource
       * @return the list of relations
       * @throws CmsException if something goes wrong
       */
      List<CmsRelation> readOutgoingRelations(CmsObject cms, CmsResource resource) throws CmsException {
  
          List<CmsRelation> results = cms.readRelations(
              CmsRelationFilter.relationsFromStructureId(resource.getStructureId()).filterType(
                  CmsRelationType.LOCALE_VARIANT));
          return results;
      }
  
  }
  