/**
    * 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.templatingkit.templates.components;
  
  import info.magnolia.cms.core.MgnlNodeType;
  import info.magnolia.cms.util.ContentUtil;
  import info.magnolia.jcr.util.NodeUtil;
  import info.magnolia.jcr.util.PropertyUtil;
  import info.magnolia.jcr.wrapper.I18nNodeWrapper;
  import info.magnolia.module.dms.DMSModule;
  import info.magnolia.module.dms.beans.Document;
  import info.magnolia.module.templatingkit.STKModule;
  import info.magnolia.module.templatingkit.dam.Asset;
  import info.magnolia.module.templatingkit.dam.DAMException;
  import info.magnolia.module.templatingkit.dam.DAMHandler;
  import info.magnolia.module.templatingkit.functions.STKTemplatingFunctions;
  import info.magnolia.module.templatingkit.templates.AbstractSTKTemplateModel;
  import info.magnolia.rendering.model.RenderingModel;
  import info.magnolia.rendering.template.TemplateDefinition;
  import info.magnolia.templating.functions.TemplatingFunctions;
  
  import java.util.ArrayList;
  import java.util.List;
  
  import javax.inject.Inject;
  import javax.jcr.ItemNotFoundException;
  import javax.jcr.Node;
  import javax.jcr.RepositoryException;
  
  import org.apache.commons.lang.ArrayUtils;
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  /**
   * STK Renderable Model definition dedicated to Image Gallery display.
   * 
   * @param <RD> the TemplateDefinition this model is operating on.
   * @version $Id$
   */
  public class ImageGalleryParagraphModel<RD extends TemplateDefinition> extends AbstractSTKTemplateModel<TemplateDefinition> {
  
      private static Logger log = LoggerFactory.getLogger(ImageGalleryParagraphModel.class);
  
      protected static final String[] ALLOWED_IMAGE_TYPES = new String[] { "gif", "jpg", "jpeg", "png" };
  
      private STKModule stkModule;
  
      @Inject
      public ImageGalleryParagraphModel(Node content, RD definition, RenderingModel<?> parent, STKTemplatingFunctions stkFunctions, TemplatingFunctions templatingFunctions, STKModule stkModule) {
          super(content, definition, parent, stkFunctions, templatingFunctions);
          this.stkModule = stkModule;
      }
  
      public List<Asset> getImages() throws DAMException {
          List<Asset> images = new ArrayList<Asset>();
          List<String> keys = getKeys();
  
          DAMHandler handler = getDAMHandler();
          for (String key : keys) {
              Asset asset = handler.getAssetByKey(key);
              images.add(asset);
          }
          return images;
      }
  
      protected DAMHandler getDAMHandler() {
          return stkModule.getDamSupport().getHandler(DMSModule.getInstance().getRepository());
      }
 
     protected List<String> getKeys() {
         // can't use former code because STKFunctions#getReferencedContent is throwing RuntimeRepositoryException which is hiding real cause
         Node dmsFolder = null;
         try {
             if (content.hasProperty("link")) {
                 String identifier = PropertyUtil.getString(content, "link");
                 dmsFolder = NodeUtil.getNodeByIdentifier("dms", identifier);
             }
         } catch (ItemNotFoundException e) {
             // ignore - referenced content doesn't exist - we will not print any images
         } catch (RepositoryException e) {
             log.error("Error while obtaining node referenced node", e);
         }
         List<String> keys = new ArrayList<String>();
         if (dmsFolder == null) {
             return keys;
         }
         dmsFolder = new I18nNodeWrapper(dmsFolder);
         final Iterable<Node> imageChildren;
         try {
             imageChildren = NodeUtil.getNodes(dmsFolder, MgnlNodeType.NT_CONTENTNODE);
         } catch (RepositoryException e) {
             log.error("", e);
             return keys;
         }
 
         for (Node imageNode : imageChildren) {
             if (showImage(new Document(ContentUtil.asContent(imageNode)))) {
                 try {
                     keys.add(imageNode.getIdentifier());
                 } catch (RepositoryException e) {
                     log.error("", e);
                 }
             }
         }
         return keys;
     }
 
     protected boolean showImage(Document doc) {
         return ArrayUtils.contains(ALLOWED_IMAGE_TYPES, doc.getFileExtension().toLowerCase());
     }
 }