# DelegatedNewsService.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.delegatednews.service;

    import org.silverpeas.components.delegatednews.model.DelegatedNews;
    import org.silverpeas.core.contribution.model.Contribution;
    import org.silverpeas.core.contribution.model.ContributionIdentifier;
    import org.silverpeas.core.date.Period;
    import org.silverpeas.core.util.ServiceProvider;

    import java.util.Collection;
    import java.util.List;

    public interface DelegatedNewsService {

      class Constants {
        /**
         * The name of the component instance configuration parameter to use to indicate the
         * contributions in the given component instance can be subject to be submitted as news to
         * publish in the home page.
         */
        public static final String DELEGATED_COMPONENT_PARAM = "delegatedNews";

        private Constants() {
        }
      }

      /**
       * Gets the instance of the actual implementation of the {@link DelegatedNewsService} interface.
       * @return a {@link DelegatedNewsService} instance.
       */
      static DelegatedNewsService get() {
        return ServiceProvider.getService(DelegatedNewsService.class);
      }

      /**
       * Submits the specified contribution as a delegated news. The submitted news can then be
       * identified by the contribution identifier from which it is spawned.
       * @param contribution the contribution to take as news to publish.
       * @param visibilityPeriod the period during which the news has to be visible. If null, the news
       * is always visible.
       * @param userId the unique identifier of the user that has submitted the contribution as news.
       */
      void submitNews(Contribution contribution, Period visibilityPeriod, String userId);

      /**
       * Gets the delegated news matching the specified contribution.
       * @param contributionId the unique identifier of the delegated news. It is the unique identifier of the
       * contribution from which it was spawned.
       * @return the asked delegated news.
       */
      DelegatedNews getDelegatedNews(String contributionId);

      /**
       * Gets the delegated news matching the specified contribution.
       * @param contributionIds a collection of unique identifiers, each of them referring a contribution
       * from which a delegated news was spawned.
       * @return a list of delegated news.
       */
      List<DelegatedNews> getDelegatedNews(Collection<String> contributionIds);

      /**
       * Gets all the delegated news.
       * @return a list of all the delegated news.
       */
      List<DelegatedNews> getAllDelegatedNews();

      /**
       * Gets all the validated delegated news.
       * @return a list of all the delegated news that are validated.
       */
      List<DelegatedNews> getAllValidDelegatedNews();

      /**
       * Validates the specified delegated news.
       * @param contributionId the unique identifier of the contribution from which the delegated news
       * was spawned.
       * @param validatorId the unique identifier of the validator.
       */
      void validateDelegatedNews(String contributionId, String validatorId);

      /**
       * Refuses the specified delegated news with the given motive.
       * @param contributionId the unique identifier of the contribution from which the delegated news
       * was spawned.
       * @param validatorId the unique identifier of the validator.
       * @param refusalMotive the motive of the refusal.
       */
      void refuseDelegatedNews(String contributionId, String validatorId, String refusalMotive);

      /**
       * Updates the period of visibility of the specified delegated news.
       * @param contributionId the unique identifier of the contribution from which the delegated news
       * was spawned.
       * @param visibilityPeriod the new visibility period. If null then the news will be always
       * visible.
       */
      void updateDateDelegatedNews(String contributionId, Period visibilityPeriod);

      /**
       * Updates the news matching the specified contribution and from the update information. This
       * method should be invoked when the matching contribution is updated.
       * @param id the unique identifier of the updated contribution and from which the news has to be
       * updated.
       * @param updaterId the unique identifier of the contribution updater.
       * @param visibilityPeriod the new period of visibility of the news. If null, then the news is
       * always visible.
       */
      void updateDelegatedNews(ContributionIdentifier id, String updaterId, Period visibilityPeriod);

      /**
       * Deletes the specified delegated news.
       * @param contributionId the unique identifier of the contribution from which the news was
       * spawned.
       */
      void deleteDelegatedNews(String contributionId);

      /**
       * Updates the order of the specified delegated news among the other news.
       * @param contributionId the unique identifier of the contribution from which the delegated news
       * was spawned.
       * @param newsOrder the new order of the news.
       * @return the updated delegated news.
       */
      DelegatedNews updateOrderDelegatedNews(String contributionId, int newsOrder);
    }