# GalleryContentManager.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 recieved a copy of the text describing
     * the FLOSS exception, and it is also available here:
     * "https://www.silverpeas.org/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;

    import org.silverpeas.components.gallery.model.MediaCriteria;
    import org.silverpeas.components.gallery.model.MediaPK;
    import org.silverpeas.components.gallery.service.GalleryService;
    import org.silverpeas.core.ResourceReference;
    import org.silverpeas.core.annotation.Service;
    import org.silverpeas.core.contribution.contentcontainer.content.AbstractSilverpeasContentManager;
    import org.silverpeas.core.contribution.contentcontainer.content.SilverContentVisibility;
    import org.silverpeas.core.contribution.model.Contribution;
    import org.silverpeas.core.util.ServiceProvider;

    import java.io.Serializable;
    import java.util.List;
    import java.util.Optional;

    import static java.util.stream.Collectors.*;

    /**
     * The gallery implementation of SilverpeasContentManager.
     */
    @Service
    public class GalleryContentManager extends AbstractSilverpeasContentManager implements Serializable {
      private static final long serialVersionUID = 1L;

      private static final String CONTENT_ICON_FILE_NAME = "gallerySmall.gif";

      /**
       * Hidden constructor as this implementation must be GET by CDI mechanism.
       */
      protected GalleryContentManager() {
      }

      @Override
      protected String getContentIconFileName(final String componentInstanceId) {
        return CONTENT_ICON_FILE_NAME;
      }

      @Override
      protected Optional<Contribution> getContribution(final String resourceId,
          final String componentInstanceId) {
        return Optional.ofNullable(getGalleryService()
            .getMedia(new MediaPK(resourceId, componentInstanceId),
                MediaCriteria.VISIBILITY.FORCE_GET_ALL));
      }

      @SuppressWarnings("unchecked")
      @Override
      protected List<Contribution> getAccessibleContributions(
          final List<ResourceReference> resourceReferences, final String currentUserId) {
        return (List) resourceReferences.stream()
            .collect(groupingBy(ResourceReference::getComponentInstanceId,
                     mapping(ResourceReference::getLocalId, toList())))
            .entrySet().stream()
            .flatMap(e -> getGalleryService().getMedia(e.getValue(), e.getKey(), MediaCriteria.VISIBILITY.FORCE_GET_ALL).stream())
            .collect(toList());
      }

      @Override
      protected <T extends Contribution> SilverContentVisibility computeSilverContentVisibility(
          final T contribution) {
        return null;
      }

      private GalleryService getGalleryService() {
        return ServiceProvider.getService(GalleryService.class);
      }
    }