# CommunityMembershipJpaRepository.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:
     * "https://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 <https://www.gnu.org/licenses/>.
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    package org.silverpeas.components.community.repository;

    import org.silverpeas.components.community.model.CommunityMembership;
    import org.silverpeas.components.community.model.CommunityOfUsers;
    import org.silverpeas.components.community.model.MembershipStatus;
    import org.silverpeas.core.admin.PaginationPage;
    import org.silverpeas.core.admin.user.model.User;
    import org.silverpeas.core.annotation.Repository;
    import org.silverpeas.core.persistence.datasource.repository.PaginationCriterion;
    import org.silverpeas.core.persistence.datasource.repository.jpa.NamedParameters;
    import org.silverpeas.core.persistence.datasource.repository.jpa.SilverpeasJpaEntityRepository;
    import org.silverpeas.core.util.SilverpeasList;

    import javax.annotation.Nonnull;
    import javax.annotation.Nullable;
    import javax.persistence.Query;
    import java.util.List;
    import java.util.Objects;
    import java.util.Optional;

    /**
     * Implementation of the repository of members of communities of users by extending the
     * {@link org.silverpeas.core.persistence.datasource.repository.jpa.SilverpeasJpaEntityRepository}
     * base repository that provides all the basic and necessary methods to save, to update, to delete
     * and to get the business entities by using the JPA engine.
     * @author mmoquillon
     */
    @Repository
    public class CommunityMembershipJpaRepository extends SilverpeasJpaEntityRepository<CommunityMembership>
        implements CommunityMembershipRepository {

      private static final String COMMUNITY_FIELD = "community";
      private static final String STATUS = "status";
      private static final String SELECT_MEMBER =
          "select m from " + CommunityMembership.class.getSimpleName() + " m ";

      @Override
      public CommunityMembershipsTable getMembershipsTable(final CommunityOfUsers community) {
        return new CommunityMembershipsTableImpl(community);
      }

      @Override
      public long deleteByComponentInstanceId(final String componentInstanceId) {
        Query deleteQuery = getEntityManager().createQuery(
            "delete from CommunityMembership m where m.community in (select c from CommunityOfUsers c " +
                "where c.componentInstanceId = :id)");
        return newNamedParameters().add("id", componentInstanceId).applyTo(deleteQuery).executeUpdate();
      }

      private class CommunityMembershipsTableImpl implements CommunityMembershipsTable {

        private final CommunityOfUsers community;

        public CommunityMembershipsTableImpl(final CommunityOfUsers community) {
          this.community = community;
        }

        @Override
        public void deleteAll() {
          Query deleteQuery = getEntityManager().createQuery(
              "delete from CommunityMembership m where m.community = :community");
          newNamedParameters().add(COMMUNITY_FIELD, community).applyTo(deleteQuery).executeUpdate();
        }

        @Override
        public Optional<CommunityMembership> getByUser(final User user) {
          NamedParameters parameters = newNamedParameters()
              .add("userId", Integer.valueOf(user.getId()))
              .add(COMMUNITY_FIELD, community);
          return Optional.ofNullable(findFirstByNamedQuery("byUserIdAndByCommunity", parameters));
        }

        @Override
        public SilverpeasList<CommunityMembership> getPending(@Nullable final PaginationPage page) {
          NamedParameters parameters = newNamedParameters()
              .add(COMMUNITY_FIELD, community)
              .add(STATUS, MembershipStatus.PENDING);
          String query = SELECT_MEMBER +
              "where m.community = :community and status = :status order by m.lastUpdateDate DESC";
          PaginationCriterion pagination =
              page == null ? PaginationCriterion.NO_PAGINATION : page.asCriterion();
          return listFromJpqlString(query, parameters, pagination, CommunityMembership.class);
        }

        @Override
        public SilverpeasList<CommunityMembership> getMembers(@Nonnull final PaginationPage page) {
          Objects.requireNonNull(page);
          NamedParameters parameters = newNamedParameters()
              .add(COMMUNITY_FIELD, community)
              .add(STATUS, MembershipStatus.COMMITTED);
          return listFromJpqlString(SELECT_MEMBER +
                  "where m.status = :status and m.community = :community order by m.lastUpdateDate DESC",
              parameters, page.asCriterion());
        }

        @Override
        public SilverpeasList<CommunityMembership> getAll(@Nonnull final PaginationPage page) {
          Objects.requireNonNull(page);
          NamedParameters parameters = newNamedParameters()
              .add(COMMUNITY_FIELD, community);
          return listFromJpqlString(SELECT_MEMBER +
                  "where m.community = :community order by m.lastUpdateDate DESC", parameters,
              page.asCriterion());
        }

        @Override
        public List<CommunityMembership> getAllMembers() {
          NamedParameters parameters = newNamedParameters()
              .add(COMMUNITY_FIELD, community);
          return findByNamedQuery("allNonRemoved", parameters);
        }

        @Override
        public boolean isEmpty() {
          Query countQuery = getEntityManager().createQuery(
              "select count(m) from CommunityMembership m where m.community = :community");
          long count =
              (long) newNamedParameters().add(COMMUNITY_FIELD, community).applyTo(countQuery)
                  .getSingleResult();
          return count == 0;
        }
      }
    }