# SimpleResourcesManager.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.resourcesmanager.service;

    import org.silverpeas.components.resourcesmanager.model.Category;
    import org.silverpeas.components.resourcesmanager.model.Reservation;
    import org.silverpeas.components.resourcesmanager.model.ReservedResource;
    import org.silverpeas.components.resourcesmanager.model.Resource;
    import org.silverpeas.components.resourcesmanager.model.ResourceStatus;
    import org.silverpeas.components.resourcesmanager.model.ResourceValidator;
    import org.silverpeas.core.ResourceReference;
    import org.silverpeas.core.annotation.Service;
    import org.silverpeas.core.contribution.attachment.AttachmentServiceProvider;
    import org.silverpeas.core.contribution.attachment.model.SimpleDocument;
    import org.silverpeas.core.contribution.content.form.RecordSet;
    import org.silverpeas.core.contribution.template.publication.PublicationTemplate;
    import org.silverpeas.core.contribution.template.publication.PublicationTemplateManager;
    import org.silverpeas.core.date.period.Period;
    import org.silverpeas.core.index.indexing.model.FullIndexEntry;
    import org.silverpeas.core.index.indexing.model.IndexEngineProxy;
    import org.silverpeas.core.index.indexing.model.IndexEntryKey;
    import org.silverpeas.kernel.util.StringUtil;

    import javax.inject.Inject;
    import javax.transaction.Transactional;
    import java.io.Serializable;
    import java.util.Date;
    import java.util.HashMap;
    import java.util.List;
    import java.util.Map;

    @Service
    @Transactional
    public class SimpleResourcesManager implements ResourcesManager, Serializable {

      private static final long serialVersionUID = -8053955818376554252L;
      private static final String TYPE = "Resource";
      @Inject
      private CategoryService categoryService;
      @Inject
      private ResourceService resourceService;
      @Inject
      private ReservationService reservationService;
      @Inject
      private ReservedResourceService reservedResourceService;

      /**
       * Creating a new resource category.
       * @param category the category to create
       */
      @Override
      public void createCategory(Category category) {
        categoryService.createCategory(category);
        createCategoryIndex(category);
      }

      @Override
      public List<Category> getCategories(String instanceId) {
        return categoryService.getCategories(instanceId);
      }

      @Override
      public Category getCategory(Long id) {
        return categoryService.getCategory(id);
      }

      @Override
      public void updateCategory(Category category) {
        categoryService.updateCategory(category);
      }

      @Override
      public void deleteCategory(Long id, String componentId) {
        // First delete all resources of category
        List<Resource> resources = getResourcesByCategory(id);
        for (Resource resource : resources) {
          resourceService.deleteResource(resource.getIdAsLong());
          deleteIndex(resource.getIdAsLong(), TYPE, componentId);
        }
        // Then delete category itself
        categoryService.deleteCategory(id);
        deleteIndex(id, "Category", componentId);
      }

      @Override
      public void createResource(Resource resource) {
        resourceService.createResource(resource);
        createResourceIndex(resource);
      }

      @Override
      public Resource getResource(Long id) {
        return resourceService.getResource(id);
      }

      @Override
      public List<Resource> getResourcesByCategory(Long categoryId) {
        return resourceService.getResourcesByCategory(categoryId);
      }

      @Override
      public void deleteResource(Long id, String componentId) {
        resourceService.deleteResource(id);
        deleteIndex(id, TYPE, componentId);
      }

      @Override
      public List<Resource> getResourcesReservable(String instanceId, Date startDate, Date endDate) {
        return resourceService.listAvailableResources(instanceId, String.valueOf(startDate.getTime()),
            String.valueOf(endDate.getTime()));
      }

      @Override
      public List<Resource> getResourcesOfReservation(String instanceId, Long reservationId) {
        return resourceService.listResourcesOfReservation(reservationId);
      }

      @Override
      public void updateReservation(Reservation reservation, List<Long> resourceIds,
          boolean updateDate) {
        List<ReservedResource> reservedResources = reservedResourceService.
            findAllReservedResourcesOfReservation(reservation.getIdAsLong());
        Map<Long, ReservedResource> oldReservedResources = new HashMap<>(reservedResources.size());
        for (ReservedResource reservedResource : reservedResources) {
          oldReservedResources.put(reservedResource.getResourceId(), reservedResource);
        }
        String reservationStatus = processReservationModification(reservation, resourceIds,
            updateDate, oldReservedResources);
        for (ReservedResource oldReservedResource : oldReservedResources.values()) {
          reservedResourceService.delete(oldReservedResource);
        }
        reservation.setStatus(reservationStatus);
        reservationService.updateReservation(reservation);
        createReservationIndex(reservation);
      }

      private String processReservationModification(Reservation reservation, List<Long> resourceIds,
          boolean updateDate, Map<Long, ReservedResource> oldReservedResources) {
        boolean refused = false;
        boolean forValidation = false;
        String reservationStatus = ResourceStatus.STATUS_VALIDATE;
        for (Long resourceId : resourceIds) {
          ReservedResource reservedResource = oldReservedResources.remove(resourceId);
          boolean isCreation = (reservedResource == null);
          reservedResource = applyModification(reservation, updateDate, resourceId, isCreation,
              reservedResource);
          if (reservedResource.isValidationRequired()) {
            forValidation = true;
          }
          if (reservedResource.isRefused()) {
            refused = true;
          }
        }
        if (forValidation) {
          reservationStatus = ResourceStatus.STATUS_FOR_VALIDATION;
        }
        if (refused) {
          reservationStatus = ResourceStatus.STATUS_REFUSED;
        }
        return reservationStatus;
      }

      private ReservedResource applyModification(Reservation reservation, boolean updateDate,
          Long resourceId, boolean isCreation, ReservedResource reservedResource) {
        if (isCreation || updateDate) {
          if (reservedResource == null) {
            reservedResource = new ReservedResource();
            reservedResource.setReservedResourceId(Long.toString(resourceId), reservation.getId());
          }
          if (resourceService.isManager(Long.parseLong(reservation.getUserId()), resourceId)) {
            reservedResource.setStatus(ResourceStatus.STATUS_VALIDATE);
          } else if (resourceService.getManagers(resourceId).isEmpty()) {
            reservedResource.setStatus(ResourceStatus.STATUS_VALIDATE);
          } else {
            reservedResource.setStatus(ResourceStatus.STATUS_FOR_VALIDATION);
          }
          if (isCreation) {
            reservedResourceService.create(reservedResource);
          } else {
            reservedResource.setResource(null);
            reservedResource.setReservation(null);
            reservedResourceService.update(reservedResource);
          }
        }
        return reservedResource;
      }

      /**
       * Get from the given aimed resources those that are unavailable on the given period.
       * @param instanceId the current component instance identifier
       * @param resources the list of resource identifiers
       * @param startDate the start date
       * @param endDate the end date
       * @return a list of reserved resources
       */
      @Override
      public List<Resource> getReservedResources(String instanceId, List<Long> resources,
          Date startDate, Date endDate) {
        return getReservedResources(instanceId, resources, startDate, endDate, null);
      }

      /**
       * Get from the given aimed resources those that are unavailable on the given period. Resources
       * attached to reservationIdToSkip are excluded (but can still be returned if they are attached
       * to another reservation on the given period).
       * @param instanceId the current component instance identifier
       * @param aimedResourceIds the identifiers of the resources to get.
       * @param startDate the start date
       * @param endDate the end date
       * @param reservationIdToSkip the unique identifier of the reservation to skip.
       * @return a list of reserved resources.
       */
      @Override
      public List<Resource> getReservedResources(String instanceId, List<Long> aimedResourceIds,
          Date startDate, Date endDate, Long reservationIdToSkip) {
        String startPeriod = String.valueOf(startDate.getTime());
        String endPeriod = String.valueOf(endDate.getTime());
        return resourceService
            .findAllReservedResources((reservationIdToSkip != null ? reservationIdToSkip : -1),
                aimedResourceIds, startPeriod, endPeriod);
      }

      @Override
      public List<Reservation> getReservations(String instanceId) {
        return reservationService.findAllReservations(instanceId);
      }

      @Override
      public List<Reservation> getUserReservations(String instanceId, String userId) {
        return reservationService.findAllReservations(instanceId);
      }

      @Override
      public Reservation getReservation(String instanceId, Long reservationId) {
        return reservationService.getReservation(reservationId);
      }

      @Override
      public void deleteReservation(Long id, String componentId) {
        deleteIndex(id, "Reservation", componentId);
        List<SimpleDocument> documents = AttachmentServiceProvider.getAttachmentService()
            .listDocumentsByForeignKey(new ResourceReference(id.toString(), componentId), null);
        for (SimpleDocument document : documents) {
          AttachmentServiceProvider.getAttachmentService().deleteAttachment(document);
        }
        reservationService.deleteReservation(id);
      }

      @Override
      public List<Reservation> getReservationForValidation(String instanceId, String userId,
          final Period period) {
        String[] searchPeriod = buildSearchPeriod(period);
        return reservationService
            .findAllReservationsForValidation(instanceId, Long.parseLong(userId), searchPeriod[0],
                searchPeriod[1]);
      }

      @Override
      public List<Reservation> getReservationOfUser(String instanceId, Integer userId,
          final Period period) {
        String[] searchPeriod = buildSearchPeriod(period);
        return reservationService
            .findAllReservationsInRange(instanceId, userId, searchPeriod[0], searchPeriod[1]);
      }

      @Override
      public List<Reservation> getReservationWithResourcesOfCategory(final String instanceId,
          Integer userId, final Period period, Long categoryId) {
        String[] searchPeriod = buildSearchPeriod(period);
        return reservationService
            .findAllReservationsForCategoryInRange(instanceId, userId, categoryId, searchPeriod[0],
                searchPeriod[1]);
      }

      @Override
      public List<Reservation> getReservationWithResource(final String instanceId, Integer userId,
          final Period period, final Long resourceId) {
        String[] searchPeriod = buildSearchPeriod(period);
        return reservationService
            .findAllReservationsForResourceInRange(instanceId, userId, resourceId, searchPeriod[0],
                searchPeriod[1]);
      }

      /**
       * Construct the period of search.
       * @param period the searched period
       */
      private String[] buildSearchPeriod(Period period) {
        return new String[]{String.valueOf(period.getBeginDate().getTime()),
            String.valueOf(period.getEndDate().getTime())};
      }

      @Override
      public String getResourceOfReservationStatus(Long resourceId, Long reservationId) {
        ReservedResource reserved =
            reservedResourceService.getReservedResource(resourceId, reservationId);
        return reserved.getStatus();
      }

      private void createCategoryIndex(Category category) {

        if (category != null) {
          FullIndexEntry indexEntry = new FullIndexEntry(
              new IndexEntryKey(category.getInstanceId(), "Category", category.getIdAsString()));
          indexEntry.setTitle(category.getName());
          indexEntry.setPreview(category.getDescription());
          if (category.getUpdateDate() != null) {
            indexEntry.setCreationDate(category.getUpdateDate());
          } else {
            indexEntry.setCreationDate(category.getCreationDate());
          }
          indexEntry.setCreationUser(category.getCreaterId());
          IndexEngineProxy.addIndexEntry(indexEntry);
        }
      }

      private void createResourceIndex(Resource resource) {
        if (resource != null) {
          // Index the Reservation
          FullIndexEntry indexEntry =
              new FullIndexEntry(new IndexEntryKey(resource.getInstanceId(), TYPE,
                  resource.getIdAsString()));
          indexEntry.setTitle(resource.getName());
          indexEntry.setPreview(resource.getDescription());
          if (resource.getUpdateDate() != null) {
            indexEntry.setCreationDate(resource.getUpdateDate());
          } else {
            indexEntry.setCreationDate(resource.getCreationDate());
          }
          indexEntry.setCreationUser(resource.getCreaterId());
          Long categoryId = resource.getCategoryId();
          if (categoryId != null) {
            Category category = getCategory(categoryId);
            if (category != null) {
              String xmlFormName = category.getForm();
              if (StringUtil.isDefined(xmlFormName)) {
                indexResourceForm(resource, indexEntry, xmlFormName);
              }
            }
          }

          IndexEngineProxy.addIndexEntry(indexEntry);
        }
      }

      private void indexResourceForm(Resource resource, FullIndexEntry indexEntry, String xmlFormName) {
        String xmlFormShortName =
            xmlFormName.substring(xmlFormName.indexOf('/') + 1, xmlFormName.indexOf('.'));
        PublicationTemplate pubTemplate;
        try {
          pubTemplate = PublicationTemplateManager.getInstance().getPublicationTemplate(resource.
              getInstanceId() + ":" + xmlFormShortName);
          RecordSet set = pubTemplate.getRecordSet();
          set.indexRecord(String.valueOf(resource.getIdAsLong()), xmlFormName, indexEntry);
        } catch (Exception e) {
          throw new ResourcesManagerRuntimeException("SimpleResourcesManager.indexResourceForm()",e);
        }
      }

      private void createReservationIndex(Reservation reservation) {
        if (reservation != null) {
          FullIndexEntry indexEntry = new FullIndexEntry(new IndexEntryKey(reservation.getInstanceId(),
              "Reservation", reservation.getIdAsString()));
          indexEntry.setTitle(reservation.getEvent());
          indexEntry.setPreview(reservation.getReason());
          indexEntry.setCreationDate(reservation.getCreationDate());
          indexEntry.setCreationUser(reservation.getUserId());
          indexEntry.setKeywords(reservation.getPlace());
          IndexEngineProxy.addIndexEntry(indexEntry);
        }
      }

      private void deleteIndex(Long objectId, String objectType, String componentId) {
        if (objectId != null) {
          IndexEntryKey indexEntry = new IndexEntryKey(componentId, objectType,
              String.valueOf(objectId));
          IndexEngineProxy.removeIndexEntry(indexEntry);
        }
      }

      @Override
      public void indexResourceManager(String instanceId) {
        List<Reservation> listOfReservation = getReservations(instanceId);
        if (listOfReservation != null) {
          for (Reservation reservation : listOfReservation) {
            try {
              createReservationIndex(reservation);
            } catch (Exception e) {
              throw new ResourcesManagerRuntimeException("SimpleResourcesManager.indexResourceManager()",e);
            }
          }
        }
      }

      @Override
      public List<ResourceValidator> getManagers(long resourceId) {
        return resourceService.getManagers(resourceId);
      }

      @Override
      public void saveReservation(Reservation reservation, List<Long> resourceIds) {
        reservationService.createReservation(reservation, resourceIds);
        createReservationIndex(reservation);
      }

      @Override
      public void updateReservedResourceStatus(long reservationId, long resourceId, String status) {
        ReservedResource reservedResource =
            reservedResourceService.getReservedResource(resourceId, reservationId);
        if (reservedResource != null) {
          reservedResource.setStatus(status);
          reservedResourceService.update(reservedResource);
          Reservation reservation = reservedResource.getReservation();
          reservation.setStatus(reservationService.computeReservationStatus(reservation));
          reservationService.updateReservation(reservation);
        }
      }

      @Override
      public boolean isManager(long userId, long resourceId) {
        return resourceService.isManager(userId, resourceId);
      }

      @Override
      public void updateResource(Resource updatedResource, List<Long> managerIds) {
        Resource resource = getResource(updatedResource.getIdAsLong());
        resource.merge(updatedResource);
        resource.getManagers().clear();
        for (Long managerId : managerIds) {
          ResourceValidator validator = new ResourceValidator(resource.getIdAsLong(), managerId);
          if (!resource.getManagers().contains(validator)) {
            resource.getManagers().add(validator);
          }
        }
        resourceService.updateResource(resource);
        createResourceIndex(resource);
      }
    }