# CommunityInstancePreDestruction.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.com/legal/licensing"
     *
     * 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 <http://www.gnu.org/licenses/>.
     */
    package org.silverpeas.components.community;

    import org.silverpeas.components.community.notification.CommunityEventNotifier;
    import org.silverpeas.components.community.repository.CommunityMembershipRepository;
    import org.silverpeas.components.community.repository.CommunityOfUsersRepository;
    import org.silverpeas.core.admin.component.ComponentInstancePreDestruction;
    import org.silverpeas.core.annotation.Bean;
    import org.silverpeas.core.contribution.model.WysiwygContent;
    import org.silverpeas.core.notification.system.ResourceEvent;
    import org.silverpeas.kernel.annotation.Technical;

    import javax.inject.Inject;
    import javax.inject.Named;
    import javax.transaction.Transactional;
    import java.util.Optional;

    /**
     * Wipe out for the spawned community instance the resources that were allocated to him.
     */
    @Technical
    @Bean
    @Named
    public class CommunityInstancePreDestruction implements ComponentInstancePreDestruction {

      @Inject
      private CommunityOfUsersRepository communitiesRepository;
      @Inject
      private CommunityMembershipRepository membersRepository;
      @Inject
      private CommunityEventNotifier notifier;

      @Transactional
      @Override
      public void preDestroy(final String componentInstanceId) {
        // delete the content describing the community of users
        communitiesRepository.getByComponentInstanceId(componentInstanceId).ifPresent(c -> {
          Optional.ofNullable(c.getSpacePresentationContent())
              .map(WysiwygContent::getContribution)
              .ifPresent(WysiwygContent::deleteAllContents);
          // clean up the memberships to this community if not already done
          membersRepository.getMembershipsTable(c).deleteAll();
          // delete finally the community of users
          c.delete();
          notifier.notifyEventOn(ResourceEvent.Type.DELETION, c);
        });
      }
    }