/*
 * Copyright (C) 2005 Alfresco, Inc.
 *
 * Licensed under the Mozilla Public License version 1.1 
 * with a permitted attribution clause. You may obtain a
 * copy of the License at
 *
 *   http://www.alfresco.org/legal/license.txt
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND,
 * either express or implied. See the License for the specific
 * language governing permissions and limitations under the
 * License.
 */
package org.alfresco.web.templating;

import javax.faces.context.FacesContext;
import org.alfresco.model.WCMModel;
import org.alfresco.repo.avm.AVMRemote;
import org.alfresco.service.cmr.repository.ContentService;
import org.alfresco.service.cmr.repository.NodeRef;
import org.alfresco.service.cmr.repository.NodeService;
import org.alfresco.web.bean.wcm.AVMConstants;
import org.alfresco.web.templating.extension.ExtensionFunctions;
import org.springframework.web.context.WebApplicationContext;
import org.springframework.web.jsf.FacesContextUtils;

/**
 * Provides helper functions for form data renderers.
 */
// XXXarielb this class is probably temporary - but useful to
// reduce redundant code until i find a better place to put this stuff
public abstract class AbstractFormDataRenderer
   implements FormDataRenderer
{
   protected static final String ALFRESCO_NS = "http://www.alfresco.org/alfresco";
   protected static final String ALFRESCO_NS_PREFIX = "alfresco";

   private final NodeRef nodeRef;
   protected final NodeService nodeService;
   protected final ContentService contentService;

   protected AbstractFormDataRenderer(final NodeRef nodeRef,
                                      final NodeService nodeService,
                                      final ContentService contentService)
   {
      this.nodeRef = nodeRef;
      this.nodeService = nodeService;
      this.contentService = contentService;
   }

   public NodeRef getNodeRef()
   {
      return this.nodeRef;
   }

   public String getFileExtension()
   {
      return (String)
         this.nodeService.getProperty(this.nodeRef, 
                                      WCMModel.PROP_FORM_TRANSFORMER_DERIVED_FILE_EXTENSION);
   }

   protected static AVMRemote getAVMRemote()
   {
      final FacesContext fc = 
         FacesContext.getCurrentInstance();
      final WebApplicationContext wac = 
         FacesContextUtils.getRequiredWebApplicationContext(fc);
      return (AVMRemote)wac.getBean("avmRemote");
   }

   protected static ExtensionFunctions getExtensionFunctions()
   {
      return new ExtensionFunctions(AbstractFormDataRenderer.getAVMRemote());
   }

   protected static String toAVMPath(String parentAVMPath, String path)
   {
      if (path != null && path.length() != 0 && path.charAt(0) == '/')
      {
         parentAVMPath = parentAVMPath.substring(0, 
                                                 parentAVMPath.indexOf(':') + 
                                                 ('/' + AVMConstants.DIR_APPBASE + 
                                                  '/' + AVMConstants.DIR_WEBAPPS).length() + 1);
      }
      return parentAVMPath + (parentAVMPath.endsWith("/")  ?  path :  '/' + path);
   }

}