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<?php
/**
* @file
* @ingroup SpecialPage
*
* @author Brion Vibber
* @license http://www.gnu.org/copyleft/gpl.html GNU General Public License 2.0 or later
*/
/**
* Special:LinkSearch to search the external-links table.
* @ingroup SpecialPage
*/
function wfSpecialLinkSearch( $par ) {
list( $limit, $offset ) = wfCheckLimits();
global $wgOut, $wgRequest, $wgUrlProtocols, $wgMiserMode, $wgLang;
$target = $GLOBALS['wgRequest']->getVal( 'target', $par );
$namespace = $GLOBALS['wgRequest']->getIntorNull( 'namespace', null );
$protocols_list[] = '';
foreach( $wgUrlProtocols as $prot ) {
$protocols_list[] = $prot;
}
$target2 = $target;
$protocol = '';
$pr_sl = strpos($target2, '//' );
$pr_cl = strpos($target2, ':' );
if ( $pr_sl ) {
// For protocols with '//'
$protocol = substr( $target2, 0 , $pr_sl+2 );
$target2 = substr( $target2, $pr_sl+2 );
} elseif ( !$pr_sl && $pr_cl ) {
// For protocols without '//' like 'mailto:'
$protocol = substr( $target2, 0 , $pr_cl+1 );
$target2 = substr( $target2, $pr_cl+1 );
} elseif ( $protocol == '' && $target2 != '' ) {
// default
$protocol = 'http://';
}
if ( !in_array( $protocol, $protocols_list ) ) {
// unsupported protocol, show original search request
$target2 = $target;
$protocol = '';
}
$self = Title::makeTitle( NS_SPECIAL, 'Linksearch' );
$wgOut->addWikiText( wfMsg( 'linksearch-text', '<nowiki>' . $wgLang->commaList( $wgUrlProtocols) . '</nowiki>' ) );
$s = Xml::openElement( 'form', array( 'id' => 'mw-linksearch-form', 'method' => 'get', 'action' => $GLOBALS['wgScript'] ) ) .
Xml::hidden( 'title', $self->getPrefixedDbKey() ) .
'<fieldset>' .
Xml::element( 'legend', array(), wfMsg( 'linksearch' ) ) .
Xml::inputLabel( wfMsg( 'linksearch-pat' ), 'target', 'target', 50, $target ) . ' ';
if ( !$wgMiserMode ) {
$s .= Xml::label( wfMsg( 'linksearch-ns' ), 'namespace' ) . ' ' .
XML::namespaceSelector( $namespace, '' );
}
$s .= Xml::submitButton( wfMsg( 'linksearch-ok' ) ) .
'</fieldset>' .
Xml::closeElement( 'form' );
$wgOut->addHTML( $s );
if( $target != '' ) {
$searcher = new LinkSearchPage;
$searcher->setParams( array(
'query' => $target2,
'namespace' => $namespace,
'protocol' => $protocol ) );
$searcher->doQuery( $offset, $limit );
}
}
class LinkSearchPage extends QueryPage {
function setParams( $params ) {
$this->mQuery = $params['query'];
$this->mNs = $params['namespace'];
$this->mProt = $params['protocol'];
}
function getName() {
return 'LinkSearch';
}
/**
* Disable RSS/Atom feeds
*/
function isSyndicated() {
return false;
}
/**
* Return an appropriately formatted LIKE query and the clause
*/
static function mungeQuery( $query , $prot ) {
$field = 'el_index';
$rv = LinkFilter::makeLike( $query , $prot );
if ($rv === false) {
//makeLike doesn't handle wildcard in IP, so we'll have to munge here.
if (preg_match('/^(:?[0-9]{1,3}\.)+\*\s*$|^(:?[0-9]{1,3}\.){3}[0-9]{1,3}:[0-9]*\*\s*$/', $query)) {
$rv = $prot . rtrim($query, " \t*") . '%';
$field = 'el_to';
}
}
return array( $rv, $field );
}
function linkParameters() {
global $wgMiserMode;
$params = array();
$params['target'] = $this->mProt . $this->mQuery;
if( isset( $this->mNs ) && !$wgMiserMode ) {
$params['namespace'] = $this->mNs;
}
return $params;
}
function getSQL() {
global $wgMiserMode;
$dbr = wfGetDB( DB_SLAVE );
$page = $dbr->tableName( 'page' );
$externallinks = $dbr->tableName( 'externallinks' );
/* strip everything past first wildcard, so that index-based-only lookup would be done */
list( $munged, $clause ) = self::mungeQuery( $this->mQuery, $this->mProt );
$stripped = substr($munged,0,strpos($munged,'%')+1);
$encSearch = $dbr->addQuotes( $stripped );
$encSQL = '';
if ( isset ($this->mNs) && !$wgMiserMode )
$encSQL = 'AND page_namespace=' . $dbr->addQuotes( $this->mNs );
$use_index = $dbr->useIndexClause( $clause );
return
"SELECT
page_namespace AS namespace,
page_title AS title,
el_index AS value,
el_to AS url
FROM
$page,
$externallinks $use_index
WHERE
page_id=el_from
AND $clause LIKE $encSearch
$encSQL";
}
function formatResult( $skin, $result ) {
$title = Title::makeTitle( $result->namespace, $result->title );
$url = $result->url;
$pageLink = $skin->makeKnownLinkObj( $title );
$urlLink = $skin->makeExternalLink( $url, $url );
return wfMsgHtml( 'linksearch-line', $urlLink, $pageLink );
}
/**
* Override to check query validity.
*/
function doQuery( $offset, $limit, $shownavigation=true ) {
global $wgOut;
list( $this->mMungedQuery, $clause ) = LinkSearchPage::mungeQuery( $this->mQuery, $this->mProt );
if( $this->mMungedQuery === false ) {
$wgOut->addWikiText( wfMsg( 'linksearch-error' ) );
} else {
// For debugging
// Generates invalid xhtml with patterns that contain --
//$wgOut->addHTML( "\n<!-- " . htmlspecialchars( $this->mMungedQuery ) . " -->\n" );
parent::doQuery( $offset, $limit, $shownavigation );
}
}
/**
* Override to squash the ORDER BY.
* We do a truncated index search, so the optimizer won't trust
* it as good enough for optimizing sort. The implicit ordering
* from the scan will usually do well enough for our needs.
*/
function getOrder() {
return '';
}
}
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