content: /*
   * Solo - A small and beautiful blogging system written in Java.
   * Copyright (c) 2010-present, b3log.org
   *
   * Solo is licensed under Mulan PSL v2.
   * You can use this software according to the terms and conditions of the Mulan PSL v2.
   * You may obtain a copy of Mulan PSL v2 at:
   *         http://license.coscl.org.cn/MulanPSL2
   * THIS SOFTWARE IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OF ANY KIND, EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO NON-INFRINGEMENT, MERCHANTABILITY OR FIT FOR A PARTICULAR PURPOSE.
   * See the Mulan PSL v2 for more details.
   */
  package org.b3log.solo.repository;
  
  import org.b3log.latke.Keys;
  import org.b3log.latke.ioc.Inject;
  import org.b3log.latke.repository.*;
  import org.b3log.latke.repository.annotation.Repository;
  import org.b3log.solo.cache.PageCache;
  import org.b3log.solo.model.Page;
  import org.json.JSONObject;
  
  import java.util.List;
  
  /**
   * Page repository.
   *
   * @author <a href="http://88250.b3log.org">Liang Ding</a>
   * @version 1.0.0.9, Jun 6, 2019
   * @since 0.3.1
   */
  @Repository
  public class PageRepository extends AbstractRepository {
  
      /**
       * Page cache.
       */
      @Inject
      private PageCache pageCache;
  
      /**
       * Public constructor.
       */
      public PageRepository() {
          super(Page.PAGE);
      }
  
      @Override
      public void remove(final String id) throws RepositoryException {
          super.remove(id);
  
          pageCache.removePage(id);
      }
  
      @Override
      public JSONObject get(final String id) throws RepositoryException {
          JSONObject ret = pageCache.getPage(id);
          if (null != ret) {
              return ret;
          }
  
          ret = super.get(id);
          if (null == ret) {
              return null;
          }
  
          pageCache.putPage(ret);
  
          return ret;
      }
  
      @Override
      public void update(final String id, final JSONObject page, final String... propertyNames) throws RepositoryException {
          super.update(id, page, propertyNames);
  
          page.put(Keys.OBJECT_ID, id);
          pageCache.putPage(page);
      }
  
      /**
       * Gets a page by the specified permalink.
       *
       * @param permalink the specified permalink
       * @return page, returns {@code null} if not found
       * @throws RepositoryException repository exception
       */
      public JSONObject getByPermalink(final String permalink) throws RepositoryException {
          final Query query = new Query().setFilter(new PropertyFilter(Page.PAGE_PERMALINK, FilterOperator.EQUAL, permalink)).setPageCount(1);
          return getFirst(query);
      }
  
      /**
       * Gets the maximum order.
       *
       * @return order number, returns {@code -1} if not found
       * @throws RepositoryException repository exception
       */
      public int getMaxOrder() throws RepositoryException {
          final Query query = new Query().addSort(Page.PAGE_ORDER, SortDirection.DESCENDING).setPageCount(1);
          final JSONObject result = getFirst(query);
          if (null == result) {
              return -1;
          }
          return result.optInt(Page.PAGE_ORDER);
      }
  
      /**
       * Gets the upper page of the page specified by the given id.
       *
       * @param id the given id
       * @return upper page, returns {@code null} if not found
       * @throws RepositoryException repository exception
       */
      public JSONObject getUpper(final String id) throws RepositoryException {
          final JSONObject page = get(id);
          if (null == page) {
              return null;
          }
  
          final Query query = new Query().setFilter(new PropertyFilter(Page.PAGE_ORDER, FilterOperator.LESS_THAN, page.optInt(Page.PAGE_ORDER))).
                  addSort(Page.PAGE_ORDER, SortDirection.DESCENDING).setPage(1, 1).setPageCount(1);
          return getFirst(query);
      }
  
      /**
       * Gets the under page of the page specified by the given id.
       *
       * @param id the given id
       * @return under page, returns {@code null} if not found
       * @throws RepositoryException repository exception
       */
      public JSONObject getUnder(final String id) throws RepositoryException {
          final JSONObject page = get(id);
          if (null == page) {
              return null;
          }
  
          final Query query = new Query().setFilter(new PropertyFilter(Page.PAGE_ORDER, FilterOperator.GREATER_THAN, page.optInt(Page.PAGE_ORDER))).
                  addSort(Page.PAGE_ORDER, SortDirection.ASCENDING).setPage(1, 1).setPageCount(1);
          return getFirst(query);
      }
  
      /**
       * Gets a page by the specified order.
       *
       * @param order the specified order
       * @return page, returns {@code null} if not found
       * @throws RepositoryException repository exception
       */
      public JSONObject getByOrder(final int order) throws RepositoryException {
          final Query query = new Query().setFilter(new PropertyFilter(Page.PAGE_ORDER, FilterOperator.EQUAL, order)).setPageCount(1);
          return getFirst(query);
      }
  
      /**
       * Gets pages.
       *
       * @return a list of pages, returns an empty list if  not found
       * @throws RepositoryException repository exception
       */
      public List<JSONObject> getPages() throws RepositoryException {
          final Query query = new Query().addSort(Page.PAGE_ORDER, SortDirection.ASCENDING).setPageCount(1);
          return getList(query);
      }
  }
  