trackback/index.php

   1 <?php
   2         /*
   3          Trackback plugin for Elgg
   4          Initial author: Marcus Povey <marcus@dushka.co.uk>
   5         */
   6
   7         /** @file trackback/index.php Trackback endpoint.
   8          * This file receives trackback requests for entries and stores them in a database, based on the
   9          * code written for dushka.co.uk.
  10          * @author Marcus Povey <marcus@dushka.co.uk>
  11          */
  12
  13         // Run includes
  14         require_once("../../includes.php");
  15         global $messages;
  16
  17         // Identity of the entry being pinged
  18         $id = optional_param('id','', PARAM_INT);
  19
  20         // Trackback data
  21         $url = optional_param('url','');
  22         $title = optional_param('title','');
  23         $excerpt = optional_param('excerpt','');
  24         $blog_name = optional_param('blog_name','');
  25
  26         // Output the header before anything else
  27         header("Content-Type: application/xml; charset=charset=iso-8859-15");
  28
  29         // Sanity check input
  30         if ($url=="")
  31         {
  32                 trackback_Error("URL has not been given!");
  33         }
  34
  35         if ($id=="")
  36         {
  37                 trackback_Error("ID of article not specified, trackback URL is incomplete");
  38         }
  39
  40         // Construct and post the comment
  41         $comment = new stdClass;
  42         $comment->post_id = $id;
  43         $comment->postedname = $blog_name;
  44         //$comment->profile_url = $url; // This might be a nice future enhancement
  45         $comment->body = "<a href=\"$url\">$title</a><br />$excerpt";
  46         $comment->owner = -1;
  47         $comment->posted = time();
  48
  49         // Post the comment
  50         $comment = plugin_hook("weblog_comment","create",$comment);
  51         if ( ($comment!==false) && (!empty($comment)) )
  52         {
  53                 $insert_id = insert_record('weblog_comments',$comment);
  54                 $comment->ident = $insert_id;
  55                 $comment = plugin_hook("weblog_comment","publish",$comment);
  56         }
  57
  58         // Any errors?
  59         if ($comment===false)
  60         {
  61                 if (count($messages)>0)
  62                         $message = $messages[count($messages)-1];
  63                 else
  64                         $message = "Could not post message.";
  65
  66                 $errormessage = $message;
  67                 trackback_Error($errormessage);
  68         }
  69
  70         trackback_Ok();
  71
  72 ?>