package net.sourceforge.blogentis.modules.screens;
   
   //-----------------------------------------------------------------------
   //Blogentis - a blog publishing platform.
   //Copyright (C) 2004 Tassos Bassoukos <abassouk@gmail.com>
   //
   //This library is free software; you can redistribute it and/or
   //modify it under the terms of the GNU Lesser General Public
   //License as published by the Free Software Foundation; either
  //version 2.1 of the License, or (at your option) any later version.
  //
  //This library 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
  //Lesser General Public License for more details.
  //
  //You should have received a copy of the GNU Lesser General Public
  //License along with this library; if not, write to the Free Software
  //Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  //-----------------------------------------------------------------------
  //
  //$Id: ViewPost.java,v 1.2 2004/10/28 10:41:40 tassos Exp $
  //
  
  import java.util.Date;
  import java.util.List;
  
  import net.sourceforge.blogentis.feed.Feed;
  import net.sourceforge.blogentis.feed.FeedFactory;
  import net.sourceforge.blogentis.om.Blog;
  import net.sourceforge.blogentis.om.Post;
  import net.sourceforge.blogentis.om.PostPeer;
  import net.sourceforge.blogentis.plugins.BlogPluginService;
  import net.sourceforge.blogentis.plugins.base.IPostViewExtensionPoint;
  import net.sourceforge.blogentis.trackback.TrackbackPostEditExtension;
  import net.sourceforge.blogentis.turbine.BaseBlogScreen;
  import net.sourceforge.blogentis.turbine.BlogParameterParser;
  import net.sourceforge.blogentis.turbine.BlogRunData;
  import net.sourceforge.blogentis.utils.MappedConfiguration;
  
  import org.apache.torque.TorqueException;
  import org.apache.torque.util.Criteria;
  import org.apache.turbine.util.RunData;
  import org.apache.velocity.context.Context;
  
  public class ViewPost
          extends BaseBlogScreen {
      public static class CommentHelper {
          public int isCommentable(Blog blog, Post post) {
              /*
               * 0: comments allowed and open 1: comments disallowed, no comments
               * shown 2: comments shown but no additions possible due to
               * archival.
               */
              MappedConfiguration blogConf = blog.getConfiguration();
              if (!blogConf.getBoolean("blog.allowComments", true))
                  return 1;
              if (!post.isAllowComments())
                  return 1;
              if (blogConf.getBoolean("blog.commentTimeLimit", false)) {
                  long days = blogConf.getInt("blog.commentTimeLimitValue", 30);
                  Date postedDate = new Date(post.getPostedTime().getTime());
                  postedDate.setTime(postedDate.getTime() + days * 3600 * 24
                                     * 1000);
                  if (new Date().after(postedDate))
                      return 2;
              }
              return 0;
          }
  
          public boolean canReceiveTrackbacks(Blog blog, Post post) {
              return blog.getConfiguration()
                  .getBoolean(TrackbackPostEditExtension.T_BLOG_RECEIVE, false);
          }
      }
  
      protected void doBuildTemplate(RunData data, Context context)
              throws Exception {
          BlogParameterParser bpp = (BlogParameterParser)data.getParameters();
          Post p = bpp.getPost();
          if (p == null) {
              doRedirect(data, "Default.vm");
              return;
          }
          super.doBuildTemplate(data, context);
          if (p.getBlogId() != bpp.getBlog().getBlogId()) {
              throw new Exception("This post is from an other blog!");
          }
  
          Feed f = FeedFactory.getFeed(data);
          f.setContextProperties(context);
          // We don't use the comment feed here beacuse a) it will show the
          // comments in the reverse chronological order and
          // b) it will cut off the number of comments.
          context.put("comments", p.getComments());
  
          if (p.isPublished()) {
              context.put("nextPost", getNextPost(p));
              context.put("prevPost", getPreviousPost(p));
         }
         IPostViewExtensionPoint pExt = (IPostViewExtensionPoint)BlogPluginService
             .locateExtensionPoint(bpp.getBlog(), IPostViewExtensionPoint.class);
         if (pExt != null)
             context
                 .put("post", pExt.doPostViewExtensions((BlogRunData)data, p));
         context.put("commentHelper", new CommentHelper());
     }
 
     public Post getNextPost(Post p) {
         try {
             Criteria c = new Criteria();
             c.add(PostPeer.BLOG_ID, p.getBlogId());
             c.add(PostPeer.POSTED_TIME, p.getPostedTime(),
                   Criteria.GREATER_THAN);
             c.add(PostPeer.POST_TYPE, PostPeer.PUBLISHED_TYPE);
             c.addAscendingOrderByColumn(PostPeer.POSTED_TIME);
             c.setLimit(1);
             List l = PostPeer.doSelect(c);
             if (l.size() > 0)
                 return (Post)l.get(0);
         } catch (TorqueException ignored) {}
         return null;
     }
 
     public Post getPreviousPost(Post p) {
         try {
             Criteria c = new Criteria();
             c.add(PostPeer.BLOG_ID, p.getBlogId());
             c.add(PostPeer.POSTED_TIME, p.getPostedTime(), Criteria.LESS_THAN);
             c.add(PostPeer.POST_TYPE, PostPeer.PUBLISHED_TYPE);
             c.addDescendingOrderByColumn(PostPeer.POSTED_TIME);
             c.setLimit(1);
             List l = PostPeer.doSelect(c);
             if (l.size() > 0)
                 return (Post)l.get(0);
         } catch (TorqueException ignored) {}
         return null;
     }
 }