ac549401d4
* DB_WRITE now called DB_MASTER, DB_READ now called DB_SLAVE * Converted to use SQL wrapper functions instead of direct SQL in various places * Experimental method for preserving the chronological order of events when slave servers are used. Untested. * Fixes to the new post-parse existence test feature * Some.. other stuff
324 lines
8.6 KiB
PHP
324 lines
8.6 KiB
PHP
<?php
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# See deferred.doc
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class LinksUpdate {
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/* private */ var $mId, $mTitle;
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function LinksUpdate( $id, $title )
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{
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$this->mId = $id;
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$this->mTitle = $title;
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}
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function doUpdate()
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{
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global $wgUseBetterLinksUpdate, $wgLinkCache, $wgDBtransactions;
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global $wgEnablePersistentLC, $wgUseCategoryMagic;
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/* Update link tables with outgoing links from an updated article */
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/* Relies on the 'link cache' to be filled out */
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$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 = $wgLinkCache->getGoodLinks();
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}
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# Do the insertion
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$sql = "";
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if ( 0 != count( $add ) ) {
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# The link cache was constructed without FOR UPDATE, so there may be collisions
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# Ignoring for now, I'm not sure if that causes problems or not, but I'm fairly
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# sure it's better than without IGNORE
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$sql = "INSERT IGNORE INTO $links (l_from,l_to) VALUES ";
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$first = true;
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foreach( $add as $lt => $lid ) {
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if ( ! $first ) { $sql .= ","; }
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$first = false;
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$sql .= "({$this->mId},{$lid})";
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}
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}
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if ( "" != $sql ) {
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$dbw->query( $sql, $fname );
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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( $badTitle );
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}
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$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 ( $add ) ) {
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$sql = "INSERT IGNORE INTO $brokenlinks (bl_from,bl_to) VALUES ";
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$first = true;
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foreach( $add as $blt ) {
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$blt = $dbw->strencode( $blt );
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if ( ! $first ) { $sql .= ","; }
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$first = false;
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$sql .= "({$this->mId},'{$blt}')";
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}
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}
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if ( "" != $sql ) {
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$dbw->query( $sql, $fname );
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}
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#------------------------------------------------------------------------------
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# Image links
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$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 ( $add ) ) {
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$sql = "INSERT IGNORE INTO $imagelinks (il_from,il_to) VALUES ";
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$first = true;
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foreach( $add as $iname => $val ) {
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# FIXME: Change all this to avoid unnecessary duplication
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$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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if ( ! $first ) { $sql .= ","; }
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$first = false;
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$sql .= "({$this->mId},'{$iname}')";
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}
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}
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if ( "" != $sql ) {
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$dbw->query( $sql, $fname );
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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 ( $add ) ) {
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$sql = "INSERT IGNORE INTO $categorylinks (cl_from,cl_to,cl_sortkey) VALUES ";
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$first = true;
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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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if ( ! $first ) { $sql .= ","; }
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$first = false;
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$sql .= "({$this->mId},'" . $dbw->strencode( $cname ) .
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"','" . $dbw->strencode( $sortkey ) . "')";
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}
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}
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if ( "" != $sql ) {
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$dbw->query( $sql, $fname );
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}
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}
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$this->fixBrokenLinks();
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wfProfileOut( $fname );
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}
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function doDumbUpdate()
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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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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 = $wgLinkCache->getGoodLinks();
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$sql = "";
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if ( 0 != count( $a ) ) {
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$sql = "INSERT IGNORE INTO $links (l_from,l_to) VALUES ";
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$first = true;
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foreach( $a as $lt => $lid ) {
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if ( ! $first ) { $sql .= ","; }
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$first = false;
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$sql .= "({$this->mId},{$lid})";
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}
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}
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if ( "" != $sql ) {
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$dbw->query( $sql, $fname );
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}
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$sql = "DELETE FROM $brokenlinks WHERE bl_from={$this->mId}";
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$dbw->query( $sql, $fname );
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$a = $wgLinkCache->getBadLinks();
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$sql = "";
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if ( 0 != count ( $a ) ) {
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$sql = "INSERT IGNORE INTO $brokenlinks (bl_from,bl_to) VALUES ";
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$first = true;
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foreach( $a as $blt ) {
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$blt = $dbw->strencode( $blt );
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if ( ! $first ) { $sql .= ","; }
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$first = false;
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$sql .= "({$this->mId},'{$blt}')";
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}
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}
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if ( "" != $sql ) {
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$dbw->query( $sql, $fname );
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}
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$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 ( $a ) ) {
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$sql = "INSERT IGNORE INTO $imagelinks (il_from,il_to) VALUES ";
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$first = true;
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foreach( $a as $iname => $val ) {
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$iname = $dbw->strencode( $iname );
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if ( ! $first ) { $sql .= ","; }
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$first = false;
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$sql .= "({$this->mId},'{$iname}')";
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}
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}
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if ( "" != $sql ) {
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$dbw->query( $sql, $fname );
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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 ( $add ) ) {
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$sql = "INSERT IGNORE INTO $categorylinks (cl_from,cl_to,cl_sortkey) VALUES ";
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$first = true;
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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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if ( ! $first ) { $sql .= ","; }
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$first = false;
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$sql .= "({$this->mId},'" . $dbw->strencode( $cname ) .
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"','" . $dbw->strencode( $sortkey ) . "')";
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}
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}
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if ( "" != $sql ) {
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$dbw->query( $sql, $fname );
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}
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}
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$this->fixBrokenLinks();
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wfProfileOut( $fname );
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}
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function fixBrokenLinks() {
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/* Update any brokenlinks *to* this page */
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/* Call for a newly created page, or just to make sure state is consistent */
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$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( $res ) ) { return; }
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# Ignore errors. If a link existed in both the brokenlinks table and the links
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# table, that's an error which can be fixed at this stage by simply ignoring collisions
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$sql = "INSERT IGNORE INTO $links (l_from,l_to) VALUES ";
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$now = wfTimestampNow();
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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 ) { $sql .= ","; $sql2 .= ","; }
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$first = false;
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$sql .= "({$row->bl_from},{$this->mId})";
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$sql2 .= $row->bl_from;
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}
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$sql2 .= ")";
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$dbw->query( $sql, $fname );
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$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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