/**
    * This file Copyright (c) 2013-2018 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.cms.beans.config.MIMEMapping;
  import info.magnolia.commands.CommandsManager;
  import info.magnolia.i18nsystem.SimpleTranslator;
  import info.magnolia.importexport.DataTransporter;
  import info.magnolia.importexport.command.JcrExportCommand;
  import info.magnolia.ui.api.action.ActionExecutionException;
  import info.magnolia.ui.api.context.UiContext;
  import info.magnolia.ui.form.EditorCallback;
  import info.magnolia.ui.framework.util.TempFileStreamResource;
  import info.magnolia.ui.vaadin.integration.jcr.JcrItemAdapter;
  import info.magnolia.ui.vaadin.overlay.MessageStyleTypeEnum;
  
  import java.util.Map;
  
  import javax.jcr.Item;
  
  import org.apache.commons.io.FilenameUtils;
  
  import com.vaadin.server.Page;
  
  /**
   * Action for exporting a node to XML format. Uses the export command to perform the serialization to XML then sends the
   * result to the client browser.
   *
   * @see ExportActionDefinition
   */
  public class ExportAction extends AbstractCommandAction<ExportActionDefinition> {
  
      private TempFileStreamResource tempFileStreamResource;
      private final EditorCallback callback;
  
      //this is not marked with @Inject so component provider can detect the correct ctor based on arguments (with or without EditorCallback, depending if the action is used inside of a dialog or not)
      public ExportAction(ExportActionDefinition definition, JcrItemAdapter item, CommandsManager commandsManager, UiContext uiContext, SimpleTranslator i18n, EditorCallback callback) throws ActionExecutionException {
          super(definition, item, commandsManager, uiContext, i18n);
          this.callback = callback;
      }
  
      public ExportAction(ExportActionDefinition definition, JcrItemAdapter item, CommandsManager commandsManager, UiContext uiContext, SimpleTranslator i18n) throws ActionExecutionException {
          this(definition, item, commandsManager, uiContext, i18n, null);
      }
  
      @Override
      protected void onPreExecute() throws Exception {
          tempFileStreamResource = new TempFileStreamResource();
          tempFileStreamResource.setTempFileName(getCurrentItem().getItemId().getUuid());
          super.onPreExecute();
          getCommand().setOutputStream(tempFileStreamResource.getTempFileOutputStream());
      }
  
      @Override
      protected Map<String, Object> buildParams(Item jcrItem) {
          final Map<String, Object> params = super.buildParams(jcrItem);
          getCurrentItem().getItemPropertyIds().forEach(id -> params.put(id.toString(), getCurrentItem().getItemProperty(id).getValue()));
          return params;
      }
  
      /**
       * After command execution we push the created file to the client browser.<br>
       * The created data is put in the temporary file 'fileOutput' linked to 'fileOutputStream' sent to the export command.<br>
       * This temporary file is the used to create a {@code FileInputStream} that ensure that this temporary file is removed once the <br>
       * fileInputStream is closed by Vaadin resource component.
       * Directs the created file to the user.
       */
      @Override
     protected void onPostExecute() throws Exception {
         if (callback != null) {
             callback.onSuccess(getDefinition().getName());
         }
         // We need to decode UTF8 the file name due to MGNLUI-3787
         tempFileStreamResource.setFilename(DataTransporter.decodePath(getCommand().getFileName(), DataTransporter.UTF8));
         tempFileStreamResource.setMIMEType(MIMEMapping.getMIMEType(FilenameUtils.getExtension(tempFileStreamResource.getFilename())));
         // Opens the resource for download
         Page.getCurrent().open(tempFileStreamResource, "", true);
     }
 
     @Override
     protected void onError(Exception e) {
         final String title = getI18n().translate("ui-framework.abstractcommand.executionfailure");
         final String body = e.getClass().getName() + ": " + getI18n().translate(e.getMessage());
         getUiContext().openAlert(MessageStyleTypeEnum.ERROR, title, body, "cancel", () -> {
             if (callback != null) {
                 callback.onCancel();
             }
         });
     }
 
     protected JcrExportCommand getCommand() {
         return (JcrExportCommand) super.getCommand();
     }
 
 }