/**
    * This file Copyright (c) 2008-2011 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.pages;
  
  import info.magnolia.cms.core.Content;
  import info.magnolia.cms.core.HierarchyManager;
  import info.magnolia.cms.i18n.Messages;
  import info.magnolia.cms.i18n.MessagesManager;
  import info.magnolia.cms.security.AccessDeniedException;
  import info.magnolia.cms.security.AccessManager;
  import info.magnolia.cms.security.Permission;
  import info.magnolia.context.MgnlContext;
  import info.magnolia.module.admininterface.TemplatedMVCHandler;
  import info.magnolia.module.data.commands.ImportCommand;
  
  import java.io.IOException;
  
  import javax.servlet.ServletException;
  import javax.servlet.http.HttpServletRequest;
  import javax.servlet.http.HttpServletResponse;
  
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  /**
   * RSS Aggregator UI.
   * @author Jan Haderka
   */
  public class RSSAggregatorPage extends TemplatedMVCHandler {
  
      /**
       * Stable serialVersionUID.
       */
      public static final long serialVersionUID = 222L;
  
      /**
       * View value for executing the manual backup. (won't render anything)
       */
      public static final String VIEW_EXPORT="rssaggregator";
  
      private static final String TASKS = "/modules/data/config/importers/rssaggregator/automatedExecution";
  
      private static final String RSSAGGREGATOR_PAGE = "RSSAggregatorPage";
  
      private static Logger log = LoggerFactory.getLogger(RSSAggregatorPage.class);
  
      protected boolean mgnlKeepVersions;
  
      protected int mgnlMaxEntriesPerFile;
  
      private boolean manualRefresh;
  
      private String mgnlImportRepeat;
  
      /**
       * Getter for <code>mgnlKeepVersions</code>.
       * @return Returns the mgnlKeepVersions.
       */
      public boolean isMgnlKeepVersions() {
          return this.mgnlKeepVersions;
      }
  
      /**
       * Setter for <code>mgnlKeepVersions</code>.
       * @param mgnlKeepVersions The mgnlKeepVersions to set.
       */
      public void setMgnlKeepVersions(boolean mgnlKeepVersions) {
          this.mgnlKeepVersions = mgnlKeepVersions;
     }
 
     /**
      * Getter for <code>maualBackup</code>.
      * @return Returns the manualRefresh flag.
      */
     public boolean isManualBackup() {
         return this.manualRefresh;
     }
 
     /**
      * Setter for <code>manualRefresh</code>.
      * @param backup The manualRefresh to set.
      */
     public void setManualRefresh(boolean backup) {
         this.manualRefresh = backup;
     }
 
     /**
      * @param name
      * @param request
      * @param response
      */
     public RSSAggregatorPage(String name, HttpServletRequest request, HttpServletResponse response) {
         super(name, request, response);
     }
 
     /**
      * @see info.magnolia.cms.servlets.MVCServletHandlerImpl#getCommand()
      */
     public String getCommand() {
         if (this.manualRefresh) {
             return "manualRefresh";
         }
         return super.getCommand();
     }
 
     /**
      * Actually perform backup.
      */
     public String manualRefresh() throws Exception {
         if (!checkPermissions(request, "data", "/rssaggregator", Permission.WRITE)) {
             throw new ServletException(new AccessDeniedException(
                 "Write permission needed for feed update. User not allowed to WRITE to data workspace.")); //$NON-NLS-1$
         }
         ImportCommand cmd = new ImportCommand();
         cmd.setImporter("rssaggregator");
         cmd.execute(MgnlContext.getInstance());
         return RSSAGGREGATOR_PAGE;
     }
 
     public String automaticUpdate() throws Exception {
         HierarchyManager hm = MgnlContext.getHierarchyManager("config");
         Content execution = hm.getContent(TASKS);
         execution.getNodeData("enabled").setValue(true);
         execution.getNodeData("cron").setValue( "0 0/" + getMgnlImportRepeat() + " * * * *");
         hm.save();
 
         return RSSAGGREGATOR_PAGE;
     }
 
     private String getMgnlImportRepeat() {
         return mgnlImportRepeat;
     }
 
     public int getAutoUpdate() throws Exception {
         HierarchyManager hm = MgnlContext.getHierarchyManager("config");
         Content execution = hm.getContent(TASKS);
         String[] cron = execution.getNodeData("cron").getString().split(" ");
         if (cron[1].indexOf('/') < 0) {
             return 0;
         } else {
             return Integer.parseInt(cron[1].substring(cron[1].indexOf('/') + 1));
         }
     }
 
     /**
      * Uses access manager to authorize this request.
      * @param request HttpServletRequest as received by the service method
      * @return boolean true if read access is granted
      */
     protected boolean checkPermissions(HttpServletRequest request, String repository, String basePath,
         long permissionType) {
 
         AccessManager accessManager = MgnlContext.getAccessManager(repository);
         if (accessManager != null) {
             if (!accessManager.isGranted(basePath, permissionType)) {
                 return false;
             }
         }
         return true;
     }
 
     public void renderHtml(String view) throws IOException {
         // if we are running the backup, everything is already done --> do not render
         if(VIEW_EXPORT.equals(view)){
             return;
         }
         super.renderHtml(view);
     }
 
     public Messages getMessages() {
         return MessagesManager.getMessages("info.magnolia.module.rssaggregator.messages");
     }
 
     public void setMgnlImportRepeat(String mgnlImportRepeat) {
         this.mgnlImportRepeat = mgnlImportRepeat;
     }
 
 }