302 lines
8.1 KiB
PHP
302 lines
8.1 KiB
PHP
<?php
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/**
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* See deferred.doc
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* @package MediaWiki
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*/
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/**
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* @todo document
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* @package MediaWiki
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*/
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class LinksUpdate {
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/**#@+
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* @access private
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*/
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var $mId, $mTitle;
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/**#@- */
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/**
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* Constructor
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* Initialize private variables
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* @param integer $id
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* @param string $title
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*/
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function LinksUpdate( $id, $title ) {
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$this->mId = $id;
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$this->mTitle = $title;
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}
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/**
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* Update link tables with outgoing links from an updated article
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* Relies on the 'link cache' to be filled out.
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*/
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function doUpdate() {
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global $wgUseBetterLinksUpdate, $wgLinkCache, $wgDBtransactions;
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global $wgEnablePersistentLC, $wgUseCategoryMagic;
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$fname = 'LinksUpdate::doUpdate';
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wfProfileIn( $fname );
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$del = array();
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$add = array();
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$dbw =& wfGetDB( DB_MASTER );
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$links = $dbw->tableName( 'links' );
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$brokenlinks = $dbw->tableName( 'brokenlinks' );
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$imagelinks = $dbw->tableName( 'imagelinks' );
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$categorylinks = $dbw->tableName( 'categorylinks' );
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#------------------------------------------------------------------------------
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# Good links
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if ( $wgLinkCache->incrementalSetup( LINKCACHE_GOOD, $del, $add ) ) {
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# Delete where necessary
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if ( count( $del ) ) {
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$sql = "DELETE FROM $links WHERE l_from={$this->mId} AND l_to IN(".
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implode( ',', $del ) . ')';
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$dbw->query( $sql, $fname );
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}
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} else {
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# Delete everything
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$dbw->delete( 'links', array( 'l_from' => $this->mId ), $fname );
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# Get the addition list
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$add = $wgLinkCache->getGoodLinks();
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}
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# Do the insertion
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if ( 0 != count( $add ) ) {
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$arr=array();
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foreach($add as $lt=>$lid)
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array_push($arr,array(
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'l_from'=>$this->mId,
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'l_to'=>$lid));
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# The link cache was constructed without FOR UPDATE, so there may be collisions
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# Ignoring for now, I'm not sure if that causes problems or not, but I'm fairly
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# sure it's better than without IGNORE
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$dbw->insert('links', $arr, $fname, array('IGNORE'));
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}
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#------------------------------------------------------------------------------
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# Bad links
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if ( $wgLinkCache->incrementalSetup( LINKCACHE_BAD, $del, $add ) ) {
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# Delete where necessary
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if ( count( $del ) ) {
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$sql = "DELETE FROM $brokenlinks WHERE bl_from={$this->mId} AND bl_to IN(";
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$first = true;
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foreach( $del as $badTitle ) {
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if ( $first ) {
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$first = false;
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} else {
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$sql .= ',';
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}
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$sql .= $dbw->addQuotes( $badTitle );
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}
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$sql .= ')';
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$dbw->query( $sql, $fname );
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}
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} else {
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# Delete all
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$dbw->delete( 'brokenlinks', array( 'bl_from' => $this->mId ) );
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# Get addition list
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$add = $wgLinkCache->getBadLinks();
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}
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# Do additions
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$sql = '';
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if ( 0 != count ( $add ) ) {
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$arr=array();
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foreach( $add as $blt ) {
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$blt = $dbw->strencode( $blt );
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array_push($arr,array(
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'bl_from'=>$this->mId,
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'bl_to'=>$blt));
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}
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$dbw->insert( 'brokenlinks',$arr,$fname,array('IGNORE'));
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}
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#------------------------------------------------------------------------------
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# Image links
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$sql = "DELETE FROM $imagelinks WHERE il_from='{$this->mId}'";
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$dbw->query( $sql, $fname );
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# Get addition list
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$add = $wgLinkCache->getImageLinks();
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# Do the insertion
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$sql = '';
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$image = Namespace::getImage();
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if ( 0 != count ( $add ) ) {
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$arr = array();
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foreach ($add as $iname => $val ) {
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$nt = Title::makeTitle( $image, $iname );
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if( !$nt ) continue;
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$nt->invalidateCache();
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$iname = $dbw->strencode( $iname );
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array_push($arr,array(
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'il_from'=>$this->mId,
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'il_to'=>$iname));
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}
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$dbw->insert('imagelinks', $arr, $fname, array('IGNORE'));
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}
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#------------------------------------------------------------------------------
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# Category links
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if( $wgUseCategoryMagic ) {
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$sql = "DELETE FROM $categorylinks WHERE cl_from='{$this->mId}'";
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$dbw->query( $sql, $fname );
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# Get addition list
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$add = $wgLinkCache->getCategoryLinks();
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# Do the insertion
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$sql = '';
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if ( 0 != count ( $add ) ) {
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$arr=array();
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foreach( $add as $cname => $sortkey ) {
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$nt = Title::makeTitle( NS_CATEGORY, $cname );
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if( !$nt ) continue;
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$nt->invalidateCache();
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array_push($arr,array(
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'cl_from'=>$this->mId,
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'cl_to'=>$dbw->strencode( $cname ),
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'cl_sortkey'=>$dbw->strencode( $sortkey )));
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}
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$dbw->insert('categorylinks',$arr,$fname,array('IGNORE'));
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}
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}
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$this->fixBrokenLinks();
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wfProfileOut( $fname );
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}
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/**
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* Old inefficient update function
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* Used for rebuilding the link table
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* @todo Only used by ./maintenance/refreshLinks.inc probably need to be replaced
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* @deprecated
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*/
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function doDumbUpdate() {
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global $wgLinkCache, $wgDBtransactions, $wgUseCategoryMagic;
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$fname = 'LinksUpdate::doDumbUpdate';
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wfProfileIn( $fname );
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$dbw =& wfGetDB( DB_MASTER );
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$links = $dbw->tableName( 'links' );
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$brokenlinks = $dbw->tableName( 'brokenlinks' );
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$imagelinks = $dbw->tableName( 'imagelinks' );
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$categorylinks = $dbw->tableName( 'categorylinks' );
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$sql = "DELETE FROM $links WHERE l_from={$this->mId}";
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$dbw->query( $sql, $fname );
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$a = $wgLinkCache->getGoodLinks();
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if ( 0 != count( $a ) ) {
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$arr=array();
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foreach( $a as $lt => $lid ) {
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array_push($arr,array(
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'l_from'=>$this->mId,
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'l_to'=>$lid));
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}
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$dbw->insert('links',$arr,$fname,array('IGNORE'));
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}
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$sql = "DELETE FROM $brokenlinks WHERE bl_from={$this->mId}";
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$dbw->query( $sql, $fname );
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$a = $wgLinkCache->getBadLinks();
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if ( 0 != count ( $a ) ) {
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$arr=array();
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foreach( $a as $blt ) {
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$blt = $dbw->strencode( $blt );
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array_push($arr,array(
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'bl_from'=>$this->mId,
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'bl_to'=>$blt));
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}
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$dbw->insert('brokenlinks',$arr,$fname,array('IGNORE'));
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}
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$sql = "DELETE FROM $imagelinks WHERE il_from={$this->mId}";
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$dbw->query( $sql, $fname );
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$a = $wgLinkCache->getImageLinks();
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$sql = '';
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if ( 0 != count ( $a ) ) {
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$arr=array();
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foreach( $a as $iname => $val )
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array_push($arr,array(
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'il_from'=>$this->mId,
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'il_to'=>$dbw->strencode( $iname )));
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$dbw->insert('imagelinks',$arr,$fname,array('IGNORE'));
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}
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if( $wgUseCategoryMagic ) {
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$sql = "DELETE FROM $categorylinks WHERE cl_from='{$this->mId}'";
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$dbw->query( $sql, $fname );
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# Get addition list
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$add = $wgLinkCache->getCategoryLinks();
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# Do the insertion
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$sql = '';
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if ( 0 != count ( $add ) ) {
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$arr=array();
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foreach( $add as $cname => $sortkey ) {
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# FIXME: Change all this to avoid unnecessary duplication
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$nt = Title::makeTitle( NS_CATEGORY, $cname );
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if( !$nt ) continue;
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$nt->invalidateCache();
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array_push($arr,array(
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'cl_from'=>$this->mId,
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'cl_to'=>$dbw->strencode( $cname ),
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'cl_sortkey'=>$dbw->strencode( $sortkey )));
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}
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$dbw->insert('categorylinks',$arr,$fname,array('IGNORE'));
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}
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}
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$this->fixBrokenLinks();
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wfProfileOut( $fname );
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}
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/**
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* Update any brokenlinks *to* this page
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* Call for a newly created page, or just to make sure state is consistent
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*/
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function fixBrokenLinks() {
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$fname = 'LinksUpdate::fixBrokenLinks';
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$dbw =& wfGetDB( DB_MASTER );
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$cur = $dbw->tableName( 'cur' );
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$links = $dbw->tableName( 'links' );
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$res = $dbw->select( 'brokenlinks', array( 'bl_from' ), array( 'bl_to' => $this->mTitle ),
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$fname, 'FOR UPDATE' );
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if ( 0 == $dbw->numRows( $res ) ) { return; }
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$arr=array();
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$now = $dbw->timestamp();
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$sql2 = "UPDATE $cur SET cur_touched='{$now}' WHERE cur_id IN (";
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$first = true;
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while ( $row = $dbw->fetchObject( $res ) ) {
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if ( ! $first ) { $sql2 .= ","; }
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$first = false;
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array_push($arr,array('l_from'=>$row->bl_from,'l_to'=>$this->mId));
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$sql2 .= $row->bl_from;
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}
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$sql2 .= ')';
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# Ignore errors. If a link existed in both the brokenlinks table and the links
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# table, that's an error which can be fixed at this stage by simply ignoring collisions
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$dbw->insert('links',$arr,$fname,array('IGNORE'));
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$dbw->query( $sql2, $fname );
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$dbw->delete( 'brokenlinks', array( 'bl_to' => $this->mTitle ), $fname );
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}
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}
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?>
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