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<?php
/**
 * Provide functions to handle article trackbacks.
 * @file
 * @ingroup SpecialPage
 */

require_once( './includes/WebStart.php' );

function XMLsuccess() {
	header( "Content-Type: application/xml; charset=utf-8" );
	echo "<?xml version=\"1.0\" encoding=\"utf-8\"?>
<response>
<error>0</error>
</response>
	";
	exit;
}

function XMLerror( $err = "Invalid request." ) {
	header( "HTTP/1.0 400 Bad Request" );
	header( "Content-Type: application/xml; charset=utf-8" );
	echo "<?xml version=\"1.0\" encoding=\"utf-8\"?>
<response>
<error>1</error>
<message>Invalid request: $err</message>
</response>
";
		exit;
}

if( !$wgUseTrackbacks )
	XMLerror("Trackbacks are disabled.");

if( !isset( $_POST['url'] )
 || !isset( $_REQUEST['article'] ) )
	XMLerror("Required field not specified");

$dbw = wfGetDB( DB_MASTER );

$tbtitle = strval( @$_POST['title'] );
$tbex = strval( @$_POST['excerpt'] );
$tburl = strval( $_POST['url'] );
$tbname = strval( @$_POST['blog_name'] );
$tbarticle = strval( $_REQUEST['article'] );

$title = Title::newFromText($tbarticle);
if( !$title || !$title->exists() )
	XMLerror( "Specified article does not exist." );

$dbw->insert('trackbacks', array(
	'tb_page'	=> $title->getArticleID(),
	'tb_title'	=> $tbtitle,
	'tb_url'	=> $tburl,
	'tb_ex'		=> $tbex,
	'tb_name'	=> $tbname
));

$dbw->commit();

XMLsuccess();