# GalleryUpdateMediaDataProcess.java

    /*
     * Copyright (C) 2000 - 2024 Silverpeas
     *
     * This program is free software: you can redistribute it and/or modify
     * it under the terms of the GNU Affero General Public License as
     * published by the Free Software Foundation, either version 3 of the
     * License, or (at your option) any later version.
     *
     * As a special exception to the terms and conditions of version 3.0 of
     * the GPL, you may redistribute this Program in connection with Free/Libre
     * Open Source Software ("FLOSS") applications as described in Silverpeas's
     * FLOSS exception. You should have received a copy of the text describing
     * the FLOSS exception, and it is also available here:
     * "http://www.silverpeas.org/docs/core/legal/floss_exception.html"
     *
     * This program 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 Affero General Public License for more details.
     *
     * You should have received a copy of the GNU Affero General Public License
     * along with this program. If not, see <https://www.gnu.org/licenses/>.
     */
    package org.silverpeas.components.gallery.process.media;

    import org.silverpeas.components.gallery.dao.MediaDAO;
    import org.silverpeas.components.gallery.delegate.MediaDataUpdateDelegate;
    import org.silverpeas.components.gallery.model.AlbumMedia;
    import org.silverpeas.components.gallery.model.Media;
    import org.silverpeas.components.gallery.notification.AlbumMediaEventNotifier;
    import org.silverpeas.components.gallery.process.AbstractGalleryDataProcess;
    import org.silverpeas.core.contribution.content.form.PagesContext;
    import org.silverpeas.core.notification.system.ResourceEvent;
    import org.silverpeas.core.process.management.ProcessExecutionContext;
    import org.silverpeas.core.process.session.ProcessSession;

    import java.util.Collection;

    import static org.silverpeas.kernel.util.StringUtil.isDefined;

    /**
     * Process to update a media in Database
     * @author Yohann Chastagnier
     */
    public class GalleryUpdateMediaDataProcess extends AbstractGalleryDataProcess {

      /**
       * Delegate in charge of updating media data
       */
      private final MediaDataUpdateDelegate delegate;
      private final boolean updateTechnicalData;
      private final Media mediaBeforeChanges;
      private Collection<String> albumIds;

      /**
       * Gets an instance
       * @param media
       * @return
       */
      public static GalleryUpdateMediaDataProcess getInstance(final Media media) {
        return new GalleryUpdateMediaDataProcess(media, null, false);
      }

      /**
       * Gets an instance
       * @param media
       * @param delegate
       * @return
       */
      public static GalleryUpdateMediaDataProcess getInstance(final Media media,
          final MediaDataUpdateDelegate delegate) {
        return new GalleryUpdateMediaDataProcess(media, delegate, true);
      }

      /**
       * Default hidden constructor
       * @param media
       * @param delegate
       * @param updateTechnicalData
       */
      protected GalleryUpdateMediaDataProcess(final Media media, final MediaDataUpdateDelegate delegate,
          final boolean updateTechnicalData) {
        super(media);
        this.delegate = delegate;
        this.updateTechnicalData = updateTechnicalData;
        this.mediaBeforeChanges = media.getCopy();
      }

      /*
       * (non-Javadoc)
       *
       * AbstractGalleryDataProcess#processData(com.silverpeas.gallery
       * .process.GalleryProcessExecutionContext, ProcessSession)
       */
      @Override
      protected void processData(final ProcessExecutionContext context,
          final ProcessSession session) throws Exception {

        // Sets functional data media
        if (delegate != null) {
          // Gets the albums
          albumIds = MediaDAO.getAlbumIdsOf(getMedia());

          if (delegate.isHeaderData()) {
            delegate.updateHeader(getMedia());
          }

          // Persists form data
          if (delegate.isForm()) {
            final String mediaId = getMedia().getId();
            final PagesContext pageContext =
                new PagesContext("mediaForm", "0", delegate.getLanguage(), false,
                    context.getComponentInstanceId(), context.getUser().getId(), delegate.getAlbumId());
            pageContext.setEncoding("UTF-8");
            pageContext.setObjectId(mediaId);
            if (delegate.isSkipEmptyValues()) {
              pageContext.setUpdatePolicy(PagesContext.ON_UPDATE_IGNORE_EMPTY_VALUES);
            }
            delegate.updateForm(mediaId, pageContext);
          }
        }

        // Update media
        updateMedia(updateTechnicalData, context);
      }

      @Override
      public void onSuccessful() throws Exception {
        super.onSuccessful();
        if (isDefined(mediaBeforeChanges.getId()) && albumIds != null) {
          final AlbumMediaEventNotifier notifier = AlbumMediaEventNotifier.get();
          for (final String albumId : albumIds) {
            notifier.notifyEventOn(ResourceEvent.Type.UPDATE,
                new AlbumMedia(albumId, mediaBeforeChanges),
                new AlbumMedia(albumId, getMedia()));
          }
        }
      }
    }