/*
    * Copyright (C) 2003-2008 eXo Platform SAS.
    *
    * 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.
    *
    * 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 General Public License for more details.
   *
   * You should have received a copy of the GNU General Public License
   * along with this program; if not, see<http://www.gnu.org/licenses/>.
   */
  package org.exoplatform.services.wcm.skin;
  
  import javax.jcr.Node;
  
  import org.exoplatform.services.jcr.ext.common.SessionProvider;
  import org.exoplatform.services.wcm.core.BaseWebSchemaHandler;
  import org.exoplatform.services.wcm.core.WebSchemaConfigService;
  import org.exoplatform.services.wcm.portal.PortalFolderSchemaHandler;
  import org.exoplatform.services.wcm.utils.WCMCoreUtils;
  
  /**
   * Created by The eXo Platform SAS.
   *
   * @author : Hoa.Pham
   * hoa.pham@exoplatform.com
   * May 28, 2008
   */
  public class CSSFileHandler extends BaseWebSchemaHandler {
  
    /* (non-Javadoc)
     * @see org.exoplatform.services.wcm.core.BaseWebSchemaHandler#getHandlerNodeType()
     */
    protected String getHandlerNodeType() { return "nt:file"; }
  
    /* (non-Javadoc)
     * @see org.exoplatform.services.wcm.core.BaseWebSchemaHandler#getParentNodeType()
     */
    protected String getParentNodeType() { return "exo:cssFolder" ; }
  
    /** The is in portal css folder. */
    private boolean isInPortalCSSFolder = false;
  
    /*
     * (non-Javadoc)
     * @see
     * org.exoplatform.services.wcm.core.BaseWebSchemaHandler#matchHandler(javax
     * .jcr.Node, org.exoplatform.services.jcr.ext.common.SessionProvider)
     */
    public boolean matchHandler(SessionProvider sessionProvider, Node node) throws Exception {
      if (!matchNodeType(node))
        return false;
      if (!matchMimeType(node))
        return false;
      isInPortalCSSFolder = matchPortalCSSFolder(sessionProvider, node);
      if (isInPortalCSSFolder)
        return true;
      if (!matchParentNodeType(node)) {
        return false;
      }
      return true;
    }
  
    /**
     * Match node type.
     *
     * @param node the node
     *
     * @return true, if successful
     *
     * @throws Exception the exception
     */
    private boolean matchNodeType(Node node) throws Exception{
      return node.getPrimaryNodeType().getName().equals("nt:file");
    }
  
    /**
     * Match mime type.
     *
     * @param node the node
     *
     * @return true, if successful
     *
     * @throws Exception the exception
     */
    private boolean matchMimeType(Node node) throws Exception {
      String mimeType = getFileMimeType(node);
      if ("text/css".equals(mimeType))
        return true;
      if ("text/plain".equals(mimeType))
        return true;
      return false;
    }
  
   /**
    * Match parent node type.
    *
    * @param file the file
    *
    * @return true, if successful
    *
    * @throws Exception the exception
    */
   private boolean matchParentNodeType(Node file) throws Exception {
     return file.getParent().isNodeType("exo:cssFolder");
   }
 
   /**
    * Match portal css folder.
    *
    * @param file the file
    * @param sessionProvider the session provider
    *
    * @return true, if successful
    *
    * @throws Exception the exception
    */
   private boolean matchPortalCSSFolder(SessionProvider sessionProvider, Node file) throws Exception {
     Node portal = findPortalNode(sessionProvider, file);
     if (portal == null)
       return false;
     WebSchemaConfigService schemaConfigService = WCMCoreUtils.getService(WebSchemaConfigService.class);
     PortalFolderSchemaHandler schemaHandler = schemaConfigService.getWebSchemaHandlerByType(PortalFolderSchemaHandler.class);
     Node cssFolder = schemaHandler.getCSSFolder(portal);
     return cssFolder == null ? false : file.getPath().startsWith(cssFolder.getPath());
   }
 
   /*
    * (non-Javadoc)
    * @see
    * org.exoplatform.services.wcm.core.BaseWebSchemaHandler#onCreateNode(javax
    * .jcr.Node, org.exoplatform.services.jcr.ext.common.SessionProvider)
    */
   public void onCreateNode(SessionProvider sessionProvider, Node file) throws Exception {
     addMixin(file, "exo:cssFile");
     addMixin(file,"exo:owneable");
     file.setProperty("exo:presentationType","exo:cssFile");
     if(isInPortalCSSFolder) {
       file.setProperty("exo:sharedCSS",true);
     }
   }
 
   /*
    * (non-Javadoc)
    * @see
    * org.exoplatform.services.wcm.core.BaseWebSchemaHandler#onModifyNode(javax
    * .jcr.Node, org.exoplatform.services.jcr.ext.common.SessionProvider)
    */
   public void onModifyNode(SessionProvider sessionProvider, Node file) throws Exception {
     if(isInPortalCSSFolder) {
       Node portal = findPortalNode(sessionProvider, file);
       XSkinService skinService = WCMCoreUtils.getService(XSkinService.class);
       skinService.updatePortalSkinOnModify(portal, file);
     }
   }
 
   /*
    * (non-Javadoc)
    * @see
    * org.exoplatform.services.wcm.core.BaseWebSchemaHandler#onRemoveNode(javax
    * .jcr.Node, org.exoplatform.services.jcr.ext.common.SessionProvider)
    */
   public void onRemoveNode(SessionProvider sessionProvider, Node file) throws Exception {
     if (isInPortalCSSFolder) {
       XSkinService skinService = WCMCoreUtils.getService(XSkinService.class);
       Node portal = findPortalNode(sessionProvider, file);
       skinService.updatePortalSkinOnRemove(portal, file);
     }
   }
 
 }