<?php
define('TRACKBACK', true);
require_once "common.php";
if (!$config->enable_trackbacking) {
exit;
}
$post = new Post($_GET['id']);
if (empty($_POST['title']) and empty($_POST['url']) and empty($_POST['blog_name'])) {
redirect($post->url());
}
if (!Post::exists($_GET['id'])) {
trackback_respond(true, __("Fake post ID, or nonexistant post."));
}
if (!empty($_POST['url'])) {
header('Content-Type: text/xml; charset=utf-8');
$url = strip_tags($_POST['url']);
$title = strip_tags($_POST['title']);
$excerpt = strip_tags($_POST['excerpt']);
$blog_name = strip_tags($_POST['blog_name']);
$excerpt = truncate($excerpt, 255);
$title = truncate($title, 250);
$trigger->call("trackback_receive", $url, $title, $excerpt, $blog_name);
trackback_respond();
}
static function trackback_receive($url, $title, $excerpt, $blog_name)
{
$sql = SQL::current();
$count = $sql->count("comments", array("post_id" => $_GET['id'], "author_url" => $_POST['url']));
if ($count) {
trackback_respond(true, __("A ping from that URL is already registered.", "comments"));
}
$post = new Post($_GET["id"]);
if ($post->no_results) {
return false;
}
Comment::create($blog_name, "", $_POST["url"], '<strong><a href="' . fix($url) . '">' . fix($title) . '</a></strong>' . "\n" . $excerpt, $post, "trackback");
}
