# GalleryAlbumMediaSubscriptionNotificationBuilder.java

    /*
     * Copyright (C) 2000 - 2026 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:
     * "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.notification.user;

    import org.silverpeas.components.gallery.model.AlbumDetail;
    import org.silverpeas.components.gallery.model.Media;
    import org.silverpeas.core.admin.user.model.User;
    import org.silverpeas.core.notification.user.RemoveSenderRecipientBehavior;
    import org.silverpeas.core.notification.user.UserSubscriptionNotificationBehavior;
    import org.silverpeas.core.notification.user.client.constant.NotifAction;
    import org.silverpeas.core.subscription.constant.SubscriberType;
    import org.silverpeas.core.subscription.service.NodeSubscriptionResource;
    import org.silverpeas.core.subscription.util.SubscriptionSubscriberMapBySubscriberType;
    import org.silverpeas.core.template.SilverpeasTemplate;

    import java.util.ArrayList;
    import java.util.Arrays;
    import java.util.Collection;
    import java.util.List;

    import static org.silverpeas.core.subscription.service.ResourceSubscriptionProvider.getSubscribersOfSubscriptionResource;

    /**
     * A builder of notifications to gallery subscribers to inform them about some changes in an album.
     * @author silveryocha
     */
    public class GalleryAlbumMediaSubscriptionNotificationBuilder
        extends AbstractGalleryAlbumUserNotification implements RemoveSenderRecipientBehavior,
        UserSubscriptionNotificationBehavior {

      private final NotifAction notificationCause;
      private SubscriptionSubscriberMapBySubscriberType subscriberIdsByTypes;
      List<Media> concernedMedia = new ArrayList<>();

      GalleryAlbumMediaSubscriptionNotificationBuilder(final AlbumDetail resource, final User sender) {
        super(resource, sender);
        notificationCause = NotifAction.POPULATED;
      }

      GalleryAlbumMediaSubscriptionNotificationBuilder aboutMedia(final Media... medias) {
        concernedMedia.addAll(Arrays.asList(medias));
        return this;
      }

      @Override
      protected NotifAction getAction() {
        return notificationCause;
      }

      @Override
      protected String getTemplateFileName() {
        return "galleryAlbumMediaAdded";
      }

      @Override
      protected void performTemplateData(final String language, final AlbumDetail resource,
          final SilverpeasTemplate template) {
        super.performTemplateData(language, resource, template);
        template.setAttribute("severalMedia", concernedMedia.size() > 1);
      }

      @Override
      protected Collection<String> getUserIdsToNotify() {
        return getSubscriberIdsByTypes().get(SubscriberType.USER).getAllIds();
      }

      @Override
      protected Collection<String> getGroupIdsToNotify() {
        return getSubscriberIdsByTypes().get(SubscriberType.GROUP).getAllIds();
      }

      private SubscriptionSubscriberMapBySubscriberType getSubscriberIdsByTypes() {
        if (subscriberIdsByTypes == null) {
          subscriberIdsByTypes = getSubscribersOfSubscriptionResource(
              NodeSubscriptionResource.from(getResource().getNodePK())).indexBySubscriberType();
        }
        return subscriberIdsByTypes;
      }

      @Override
      protected String getBundleSubjectKey() {
        return "gallery.media.subscription.subject";
      }
    }