/*

  * Copyright (c) 2003-2011, Simon Brown

  * All rights reserved.

  *

  * Redistribution and use in source and binary forms, with or without

  * modification, are permitted provided that the following conditions are met:

  *

  *   - Redistributions of source code must retain the above copyright

  *     notice, this list of conditions and the following disclaimer.

  *

  *   - Redistributions in binary form must reproduce the above copyright

  *     notice, this list of conditions and the following disclaimer in

  *     the documentation and/or other materials provided with the

  *     distribution.

  *

  *   - Neither the name of Pebble nor the names of its contributors may

  *     be used to endorse or promote products derived from this software

  *     without specific prior written permission.

  *

  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"

  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE

  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE

  * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE

  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR

  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF

  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS

  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN

  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)

  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE

  * POSSIBILITY OF SUCH DAMAGE.

  */

 package net.sourceforge.pebble.web.action;

 import net.sourceforge.pebble.Constants;

 import net.sourceforge.pebble.service.StaticPageService;

 import net.sourceforge.pebble.service.StaticPageServiceException;

 import net.sourceforge.pebble.domain.*;

 import net.sourceforge.pebble.util.SecurityUtils;

 import net.sourceforge.pebble.util.StringUtils;

 import net.sourceforge.pebble.web.security.RequireSecurityToken;

 import net.sourceforge.pebble.web.validation.ValidationContext;

 import net.sourceforge.pebble.web.view.RedirectView;

 import net.sourceforge.pebble.web.view.View;

 import net.sourceforge.pebble.web.view.impl.StaticPageFormView;

 import org.apache.commons.logging.Log;

 import org.apache.commons.logging.LogFactory;

 import javax.servlet.ServletException;

 import javax.servlet.http.HttpServletRequest;

 import javax.servlet.http.HttpServletResponse;

 /**

  * Saves a static page.

  *

  * @author    Simon Brown

  */

 @RequireSecurityToken

 public class SaveStaticPageAction extends SecureAction {

   /** the log used by this class */

   private static Log log = LogFactory.getLog(SaveStaticPageAction.class);

   /** the value used if the page is being previewed rather than saved */

   private static final String PREVIEW = "Preview";

   private static final String CANCEL = "Cancel";

   /**

    * Peforms the processing associated with this action.

    *

    * @param request  the HttpServletRequest instance

    * @param response the HttpServletResponse instance

    * @return the name of the next view

    */

   public View process(HttpServletRequest request, HttpServletResponse response) throws ServletException {

     String submitType = request.getParameter("submit");

     if (submitType != null && submitType.equalsIgnoreCase(PREVIEW)) {

       return previewPage(request);

     } else if (submitType != null && submitType.equalsIgnoreCase(CANCEL)) {

       return unlockPage(request);

     } else {

       return savePage(request);

     }

   }

   private View previewPage(HttpServletRequest request) throws ServletException {

     StaticPage staticPage = getStaticPage(request);

     // we don't want to actually edit the original whilst previewing

     staticPage = (StaticPage)staticPage.clone();

     populateStaticPage(staticPage, request);

     ValidationContext validationContext = new ValidationContext();

     staticPage.validate(validationContext);

     getModel().put("validationContext", validationContext);

     getModel().put(Constants.STATIC_PAGE_KEY, staticPage);

     return new StaticPageFormView();

   }

   private View unlockPage(HttpServletRequest request) throws ServletException {

     StaticPage staticPage = getStaticPage(request);

     StaticPageService service = new StaticPageService();

     service.unlock(staticPage);

     if (staticPage.isPersistent()) {

       return new RedirectView(staticPage.getLocalPermalink());

     } else {

       return new RedirectView(staticPage.getBlog().getUrl() + "viewStaticPages.secureaction");

     }

   }

   private View savePage(HttpServletRequest request) throws ServletException {

     StaticPageService service = new StaticPageService();

     StaticPage staticPage = getStaticPage(request);

     populateStaticPage(staticPage, request);

     getModel().put(Constants.STATIC_PAGE_KEY, staticPage);

     ValidationContext validationContext = new ValidationContext();

     staticPage.validate(validationContext);

     if (validationContext.hasErrors())  {

       getModel().put("validationContext", validationContext);

       return new StaticPageFormView();

     } else {

       try {

         service.putStaticPage(staticPage);

         staticPage.getBlog().info("Static page <a href=\"" + staticPage.getLocalPermalink() + "\">" + staticPage.getTitle() + "</a> saved.");

         service.unlock(staticPage);

         return new RedirectView(staticPage.getLocalPermalink());

       } catch (StaticPageServiceException e) {

         log.error(e.getMessage(), e);

         return new StaticPageFormView();

       }

     }

   }

   private StaticPage getStaticPage(HttpServletRequest request) throws ServletException {

     Blog blog = (Blog)getModel().get(Constants.BLOG_KEY);

     String id = request.getParameter("page");

     String persistent = request.getParameter("persistent");

     if (persistent != null && persistent.equalsIgnoreCase("true")) {

       try {

         StaticPageService service = new StaticPageService();

         return service.getStaticPageById(blog, id);

       } catch (StaticPageServiceException e) {

         throw new ServletException(e);

       }

     } else {

       return new StaticPage(blog);

     }

   }

   private void populateStaticPage(StaticPage staticPage, HttpServletRequest request) {

     String title = request.getParameter("title");

     String subtitle = request.getParameter("subtitle");

     String body = StringUtils.filterNewlines(request.getParameter("body"));

     String tags = request.getParameter("tags");

     String originalPermalink = request.getParameter("originalPermalink");

     String name = request.getParameter("name");

     String author = SecurityUtils.getUsername();

     String template = request.getParameter("template");

     staticPage.setTitle(title);

     staticPage.setSubtitle(subtitle);

     staticPage.setBody(body);

     staticPage.setTags(tags);

     staticPage.setAuthor(author);

     staticPage.setOriginalPermalink(originalPermalink);

     staticPage.setName(name);

     staticPage.setTemplate(template);

   }

   /**

    * Gets a list of all roles that are allowed to access this action.

    *

    * @return  an array of Strings representing role names

    * @param request

    */

   public String[] getRoles(HttpServletRequest request) {

     return new String[]{Constants.BLOG_CONTRIBUTOR_ROLE};

   }

 }