/**
    * This file Copyright (c) 2008-2012 Magnolia International
    * Ltd.  (http://www.magnolia-cms.com). All rights reserved.
    *
    *
    * This file is dual-licensed under both the Magnolia
    * Network Agreement and the GNU General Public License.
    * You may elect to use one or the other of these licenses.
    *
   * This file is distributed in the hope that it will be
   * useful, but AS-IS and WITHOUT ANY WARRANTY; without even the
   * implied warranty of MERCHANTABILITY or FITNESS FOR A
   * PARTICULAR PURPOSE, TITLE, or NONINFRINGEMENT.
   * Redistribution, except as permitted by whichever of the GPL
   * or MNA you select, is prohibited.
   *
   * 1. For the GPL license (GPL), you can redistribute and/or
   * modify this file under the terms of the GNU General
   * Public License, Version 3, as published by the Free Software
   * Foundation.  You should have received a copy of the GNU
   * General Public License, Version 3 along with this program;
   * if not, write to the Free Software Foundation, Inc., 51
   * Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
   *
   * 2. For the Magnolia Network Agreement (MNA), this file
   * and the accompanying materials are made available under the
   * terms of the MNA which accompanies this distribution, and
   * is available at http://www.magnolia-cms.com/mna.html
   *
   * Any modifications to this file must keep this entire header
   * intact.
   *
   */
  package info.magnolia.module.rssaggregator.templates.components;
  
  import info.magnolia.cms.util.QueryUtil;
  import info.magnolia.context.MgnlContext;
  import info.magnolia.jcr.util.NodeUtil;
  import info.magnolia.rendering.model.RenderingModel;
  import info.magnolia.rendering.model.RenderingModelImpl;
  import info.magnolia.rendering.template.RenderableDefinition;
  import info.magnolia.templating.functions.TemplatingFunctions;
  
  import java.util.Date;
  
  import javax.inject.Inject;
  import javax.jcr.Node;
  import javax.jcr.NodeIterator;
  import javax.jcr.RepositoryException;
  
  import org.apache.commons.lang.StringUtils;
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  
  /**
   * Base class for rendering models.
   *
   * @param <RD> Definition type.
   * @author had
   * @version $Id:$
   */
  public abstract class AbstractFeedModel<RD extends RenderableDefinition> extends RenderingModelImpl<RD> implements RenderingModel<RD> {
      protected final static Logger log = LoggerFactory.getLogger(AbstractFeedModel.class);
  
      public static final String ORDER_BY_PUBLICATION_DATE = "@pubDate";
      public static final String ORDER_BY_TITLE_NAME = "@title";
      public static final String SORT_ASCENDING = "ascending";
      public static final String SORT_DESCENDING = "descending";
  
      protected static final String AGGREGATOR_NODE = "/rssaggregator";
      protected static final String DATA_WORKSPACE = "data";
      protected static final String FEEDS_NODE = "feeds";
  
      protected static final int MAX_RESULTS = 20;
  
      protected final TemplatingFunctions templatingFunctions;
  
      @Inject
      public AbstractFeedModel(Node content, RD definition, RenderingModel<?> parent, TemplatingFunctions templatingFunctions) {
          super(content, definition, parent);
          this.templatingFunctions = templatingFunctions;
      }
  
      /**
       * This can get sometimes confusing. Freemarker will not create date from the java long time stamp format so we need to convert it to date first.
       * Depending on circumstances (whether coming from node or from node wrapper) the time stamp will be passed in as a String or as a Long object
       */
      public Date convertPubDate(Object timestamp) {
          if (timestamp == null) {
              return null;
          }
          if (timestamp instanceof String) {
              if (StringUtils.isEmpty((String) timestamp)) {
                  return null;
              }
              return new Date(Long.parseLong((String) timestamp));
          }
  
         return new Date((Long) timestamp);
     }
 
     /**
      * Find a feed node and return a property.
      *
      * @param parentNode Planet feed node.
      * @param subNode Node of the feed node where search should happen.
      * @param searchProperty Node Property that should be searched.
      * @param searchValue Search value.
      * @param resultProperty Property value od found node to be returned or null.
      */
     public String getFeedProperty(Node parentNode, String subNode, String searchProperty, String searchValue, String resultProperty) {
         String propertyValue = null;
         try {
             if (parentNode != null) {
                 String searchNode = AGGREGATOR_NODE + "/" + parentNode.getName() + "/" + subNode;
                 String sql = "select * from [nt:base] as t where ISDESCENDANTNODE([" + searchNode + "]) "
                         + "and t." + searchProperty + "='" + searchValue + "'";
                 // log.debug(sql);
 
                 NodeIterator nit = QueryUtil.search(DATA_WORKSPACE, sql);
 
                 if (nit != null && nit.hasNext()) {
                     Node fsn = nit.nextNode();
                     // there shoul dbe only one node in the result list
                     if (NodeUtil.getCollectionFromNodeIterator(nit).size() == 0) {
                         if (fsn.hasProperty(resultProperty)) {
                             propertyValue = fsn.getProperty(resultProperty).getString();
                         }
                     }
                 }
             }
         } catch (RepositoryException e) {
             log.error("Problem while getting node property: " + e.getMessage());
         }
         return propertyValue;
     }
 
     public String getContextPath() {
         return MgnlContext.getContextPath();
     }
 
 }