# KmeliaDelayedVisibilityUserNotificationReminder.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.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.kmelia.notification;

    import org.silverpeas.components.kmelia.service.KmeliaService;
    import org.silverpeas.core.contribution.model.ContributionIdentifier;
    import org.silverpeas.core.contribution.publication.model.PublicationDetail;
    import org.silverpeas.core.reminder.BackgroundReminderProcess;
    import org.silverpeas.core.reminder.DateTimeReminder;
    import org.silverpeas.core.reminder.Reminder;
    import org.silverpeas.core.reminder.ReminderProcessName;
    import org.silverpeas.core.util.ServiceProvider;
    import org.silverpeas.kernel.SilverpeasRuntimeException;
    import org.silverpeas.kernel.logging.SilverLogger;

    import javax.inject.Inject;
    import javax.inject.Named;
    import javax.inject.Singleton;
    import java.time.temporal.Temporal;

    import static org.silverpeas.core.contribution.publication.model.PublicationDetail.DELAYED_VISIBILITY_AT_MODEL_PROPERTY;
    import static org.silverpeas.core.reminder.BackgroundReminderProcess.Constants.PROCESS_NAME_SUFFIX;

    /**
     * Implementation in charge of handling data about
     * {@link org.silverpeas.core.contribution.publication.model.PublicationDetail} entities provided
     * by kmelia component instances.
     * @author silveryocha
     */
    @Named(KmeliaDelayedVisibilityUserNotificationReminder.PROCESS_NAME + PROCESS_NAME_SUFFIX)
    @Singleton
    public class KmeliaDelayedVisibilityUserNotificationReminder implements BackgroundReminderProcess {

      static final String PROCESS_NAME = "KmeliaDelayedVisibilityUserNotification";
      public static final ReminderProcessName KMELIA_DELAYED_VISIBILITY_USER_NOTIFICATION = () -> PROCESS_NAME;

      @Inject
      private KmeliaService kmeliaService;

      public static KmeliaDelayedVisibilityUserNotificationReminder get() {
        return ServiceProvider.getService(KmeliaDelayedVisibilityUserNotificationReminder.class);
      }

      @Override
      public ReminderProcessName getName() {
        return KMELIA_DELAYED_VISIBILITY_USER_NOTIFICATION;
      }

      /**
       * Sends the user notification about a specified reminder.
       * @param reminder a reminder.
       */
      @Override
      public void performWith(final Reminder reminder) {
        kmeliaService.performReminder(reminder);
      }

      /**
       * Initialize the reminder for the given publication if possible.
       * @param pubDetail the publication for which the reminder is initialized.
       * @return true if the reminder has been set successfully, false otherwise.
       */
      public boolean setAbout(final PublicationDetail pubDetail) {
        final Temporal delayedVisibilityTemporal = pubDetail.getModel()
            .getProperty(DELAYED_VISIBILITY_AT_MODEL_PROPERTY);
        if (delayedVisibilityTemporal != null) {
          final ContributionIdentifier contributionId = pubDetail.getIdentifier();
          if (Reminder.getByContribution(contributionId).stream().noneMatch(
              r -> KMELIA_DELAYED_VISIBILITY_USER_NOTIFICATION.asString().equals(r.getProcessName()))) {
            try {
              // Creating the reminder if it is not yet existing
              new DateTimeReminder(contributionId, KMELIA_DELAYED_VISIBILITY_USER_NOTIFICATION)
                  .triggerFrom(DELAYED_VISIBILITY_AT_MODEL_PROPERTY)
                  .schedule();
              return true;
            } catch (SilverpeasRuntimeException e) {
              SilverLogger.getLogger(this).error(e);
            }
          }
        }
        return false;
      }
    }