# CommunityOfUsersRemovingListener.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.model;

    import org.silverpeas.core.admin.component.notification.ComponentInstanceEvent;
    import org.silverpeas.core.admin.service.Administration;
    import org.silverpeas.core.annotation.Bean;
    import org.silverpeas.core.notification.system.CDIResourceEventListener;
    import org.silverpeas.core.persistence.Transaction;
    import org.silverpeas.kernel.annotation.Technical;

    import javax.inject.Inject;

    /**
     * The community of users application is removed, that is to say it is moved into the bin of the
     * spaces and component instances. In a such situation, the group of members of this community
     * should be also removed (id est moved into the bin of user groups)
     *
     * @author mmoquillon
     */
    @Technical
    @Bean
    public class CommunityOfUsersRemovingListener
        extends CDIResourceEventListener<ComponentInstanceEvent> {

      @Inject
      private Administration administration;

      @Override
      public void onRemoving(ComponentInstanceEvent event) {
        var componentInstance = event.getTransition().getBefore();
        CommunityOfUsers.getByComponentInstanceId(componentInstance.getId())
            .filter(c -> c.groupId != null)
            .ifPresent(c -> {
              String groupId = String.valueOf(c.groupId);
              Transaction.performInOne(() -> {
                administration.removeGroup(groupId);
                return null;
              });
            });
      }

      @Override
      public void onRecovery(ComponentInstanceEvent event) {
        var componentInstance = event.getTransition().getBefore();
        CommunityOfUsers.getByComponentInstanceId(componentInstance.getId())
            .filter(c -> c.groupId != null)
            .ifPresent(c -> {
              String groupId = String.valueOf(c.groupId);
              Transaction.performInOne(() -> {
                administration.restoreGroup(groupId);
                return null;
              });
            });
      }
    }