/*
    * Copyright (C) 2003-2011 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 Affero General Public License for more details.
   *
   * You should have received a copy of the GNU Affero General Public License
   * along with this program. If not, see <http://www.gnu.org/licenses/>.
   */
  package org.exoplatform.services.wcm.javascript;
  
  import java.io.Reader;
  import java.io.StringReader;
  
  import javax.jcr.Node;
  
  import org.exoplatform.portal.resource.Resource;
  import org.exoplatform.portal.resource.ResourceResolver;
  import org.exoplatform.services.log.ExoLogger;
  import org.exoplatform.services.log.Log;
  import org.exoplatform.services.wcm.portal.LivePortalManagerService;
  import org.exoplatform.services.wcm.utils.WCMCoreUtils;
  import org.exoplatform.web.application.javascript.JavascriptConfigService;
  
  /**
   * Created by The eXo Platform SAS
   * Author : Nguyen Anh Vu
   *          anhvurz90@gmail.com
   *          vuna@exoplatform.com
   * Nov 15, 2011
   */
  public class WCMJavascriptResourceResolver  implements ResourceResolver {
  
    private static final Log LOG = ExoLogger.getLogger(WCMJavascriptResourceResolver.class.getName());
  
    private LivePortalManagerService livePortalManagerService_;
    private JavascriptConfigService javascriptConfigService_;
  
    public WCMJavascriptResourceResolver(LivePortalManagerService livePortalManagerService,
                                         JavascriptConfigService javascriptConfigService) {
      this.livePortalManagerService_ = livePortalManagerService;
      this.javascriptConfigService_ = javascriptConfigService;
    }
  
    @Override
    public Resource resolve(String path) throws NullPointerException {
      if(!path.matches(XJavascriptService.JS_PATH_REGEXP)) return null;
      String[] elements = path.split("/");
      String portalName = elements[4];
      try {
        Node portalNode = livePortalManagerService_.getLivePortal(WCMCoreUtils.getSystemSessionProvider(), portalName);
        final String jsData = WCMCoreUtils.getSiteGlobalActiveJs(portalNode);
        if(jsData == null)
          return null;
        return new Resource(path) {
          public Reader read() {
            return new StringReader(jsData);
          }
        };
      } catch(Exception e) {
        if (LOG.isErrorEnabled()) {
          LOG.error("Unexpected error happens", e);
        }
      }
      return null;
    }
  
  }