/**
    * This file Copyright (c) 2015-2018 Magnolia International
    * Ltd.  (http://www.magnolia-cms.com). All rights reserved.
    *
    *
    * This file is dual-licensed under both the Magnolia
    * Network Agreement and the GNU General Public License.
    * You may elect to use one or the other of these licenses.
    *
   * This file is distributed in the hope that it will be
   * useful, but AS-IS and WITHOUT ANY WARRANTY; without even the
   * implied warranty of MERCHANTABILITY or FITNESS FOR A
   * PARTICULAR PURPOSE, TITLE, or NONINFRINGEMENT.
   * Redistribution, except as permitted by whichever of the GPL
   * or MNA you select, is prohibited.
   *
   * 1. For the GPL license (GPL), you can redistribute and/or
   * modify this file under the terms of the GNU General
   * Public License, Version 3, as published by the Free Software
   * Foundation.  You should have received a copy of the GNU
   * General Public License, Version 3 along with this program;
   * if not, write to the Free Software Foundation, Inc., 51
   * Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
   *
   * 2. For the Magnolia Network Agreement (MNA), this file
   * and the accompanying materials are made available under the
   * terms of the MNA which accompanies this distribution, and
   * is available at http://www.magnolia-cms.com/mna.html
   *
   * Any modifications to this file must keep this entire header
   * intact.
   *
   */
  package info.magnolia.ui.framework.action;
  
  import info.magnolia.commands.CommandsManager;
  import info.magnolia.commands.ExportJcrNodeToYamlCommand;
  import info.magnolia.i18nsystem.SimpleTranslator;
  import info.magnolia.ui.api.action.ActionExecutionException;
  import info.magnolia.ui.api.context.UiContext;
  import info.magnolia.ui.framework.util.TempFileStreamResource;
  import info.magnolia.ui.vaadin.integration.jcr.JcrItemAdapter;
  
  import java.io.IOException;
  import java.util.Map;
  
  import javax.inject.Inject;
  import javax.jcr.Item;
  
  import com.vaadin.server.Page;
  
  /**
   * Action for exporting a node to YAML format. Uses the {@link ExportJcrNodeToYamlCommand} to perform the export operation.
   * Then sends the result to the client browser.
   *
   * @see ExportYamlActionDefinition
   */
  public class ExportYamlAction extends AbstractCommandAction<ExportYamlActionDefinition> {
  
      private static final String YAML_EXTENSION = ".yaml";
  
      private TempFileStreamResource tempFileStreamResource;
  
      @Inject
      public ExportYamlAction(ExportYamlActionDefinition definition, JcrItemAdapter item, CommandsManager commandsManager, UiContext uiContext, SimpleTranslator i18n) throws ActionExecutionException {
          super(definition, item, commandsManager, uiContext, i18n);
      }
  
      @Override
      protected void onPreExecute() throws Exception {
          tempFileStreamResource = new TempFileStreamResource();
          tempFileStreamResource.setTempFileExtension(YAML_EXTENSION);
          tempFileStreamResource.setTempFileName(getCurrentItem().getItemId().getUuid());
  
          super.onPreExecute();
      }
  
      @Override
      protected void onPostExecute() throws Exception {
          final ExportJcrNodeToYamlCommand exportYamlCommand = (ExportJcrNodeToYamlCommand) getCommand();
          tempFileStreamResource.setFilename(exportYamlCommand.getFileName());
          tempFileStreamResource.setMIMEType("application/yaml");
          // Opens the resource for download
          Page.getCurrent().open(tempFileStreamResource, "", true);
      }
  
      @Override
      protected Map<String, Object> buildParams(Item jcrItem) {
          Map<String, Object> params = super.buildParams(jcrItem);
          try {
              params.put(ExportJcrNodeToYamlCommand.EXPORT_OUTPUT_STREAM, tempFileStreamResource.getTempFileOutputStream());
          } catch (IOException e) {
              throw new IllegalStateException("Failed to bind command to temp file output stream: ", e);
          }
          return params;
      }
  }