X-Git-Url: https://git.heureux-cyclage.org/?a=blobdiff_plain;f=includes%2FLinksUpdate.php;h=9e25bf07d0ae793c07cf71680b28316f741e761b;hb=cdbbe0ad4aaf40c1872d204a68a014d77981e8b7;hp=aaf0495fc716e0d554a69d45c10e0285f71abf47;hpb=ba2afcd9fa9b1f3f6a865da054068466164fd2fa;p=lhc%2Fweb%2Fwiklou.git diff --git a/includes/LinksUpdate.php b/includes/LinksUpdate.php index aaf0495fc7..9e25bf07d0 100644 --- a/includes/LinksUpdate.php +++ b/includes/LinksUpdate.php @@ -1,6 +1,6 @@ mId = $id; + /** + * Constructor + * Initialize private variables + * @param $title Integer: FIXME + * @param $parserOutput FIXME + * @param $recursive Boolean: FIXME, default 'true'. + */ + function LinksUpdate( $title, $parserOutput, $recursive = true ) { + global $wgAntiLockFlags; + + if ( $wgAntiLockFlags & ALF_NO_LINK_LOCK ) { + $this->mOptions = array(); + } else { + $this->mOptions = array( 'FOR UPDATE' ); + } + $this->mDb =& wfGetDB( DB_MASTER ); + + if ( !is_object( $title ) ) { + throw new MWException( "The calling convention to LinksUpdate::LinksUpdate() has changed. " . + "Please see Article::editUpdates() for an invocation example.\n" ); + } $this->mTitle = $title; + $this->mId = $title->getArticleID(); + + $this->mLinks = $parserOutput->getLinks(); + $this->mImages = $parserOutput->getImages(); + $this->mTemplates = $parserOutput->getTemplates(); + $this->mExternals = $parserOutput->getExternalLinks(); + $this->mCategories = $parserOutput->getCategories(); + + # Convert the format of the interlanguage links + # I didn't want to change it in the ParserOutput, because that array is passed all + # the way back to the skin, so either a skin API break would be required, or an + # inefficient back-conversion. + $ill = $parserOutput->getLanguageLinks(); + $this->mInterlangs = array(); + foreach ( $ill as $link ) { + list( $key, $title ) = explode( ':', $link, 2 ); + $this->mInterlangs[$key] = $title; + } + + $this->mRecursive = $recursive; } - - function doUpdate() - { - global $wgUseBetterLinksUpdate, $wgLinkCache, $wgDBtransactions; - global $wgEnablePersistentLC, $wgUseCategoryMagic; + /** + * Update link tables with outgoing links from an updated article + */ + function doUpdate() { + global $wgUseDumbLinkUpdate; + if ( $wgUseDumbLinkUpdate ) { + $this->doDumbUpdate(); + } else { + $this->doIncrementalUpdate(); + } + } + + function doIncrementalUpdate() { + $fname = 'LinksUpdate::doIncrementalUpdate'; + wfProfileIn( $fname ); + + # Page links + $existing = $this->getExistingLinks(); + $this->incrTableUpdate( 'pagelinks', 'pl', $this->getLinkDeletions( $existing ), + $this->getLinkInsertions( $existing ) ); + + # Image links + $existing = $this->getExistingImages(); + $this->incrTableUpdate( 'imagelinks', 'il', $this->getImageDeletions( $existing ), + $this->getImageInsertions( $existing ) ); + + # Invalidate all image description pages which had links added or removed + $imageUpdates = array_diff_key( $existing, $this->mImages ) + array_diff_key( $this->mImages, $existing ); + $this->invalidateImageDescriptions( $imageUpdates ); - /* Update link tables with outgoing links from an updated article */ - /* Relies on the 'link cache' to be filled out */ + # External links + $existing = $this->getExistingExternals(); + $this->incrTableUpdate( 'externallinks', 'el', $this->getExternalDeletions( $existing ), + $this->getExternalInsertions( $existing ) ); + + # Language links + $existing = $this->getExistingInterlangs(); + $this->incrTableUpdate( 'langlinks', 'll', $this->getInterlangDeletions( $existing ), + $this->getInterlangInsertions( $existing ) ); + + # Template links + $existing = $this->getExistingTemplates(); + $this->incrTableUpdate( 'templatelinks', 'tl', $this->getTemplateDeletions( $existing ), + $this->getTemplateInsertions( $existing ) ); + + # Category links + $existing = $this->getExistingCategories(); + $this->incrTableUpdate( 'categorylinks', 'cl', $this->getCategoryDeletions( $existing ), + $this->getCategoryInsertions( $existing ) ); - $fname = 'LinksUpdate::doUpdate'; + # Invalidate all categories which were added, deleted or changed (set symmetric difference) + $categoryUpdates = array_diff_assoc( $existing, $this->mCategories ) + array_diff_assoc( $this->mCategories, $existing ); + $this->invalidateCategories( $categoryUpdates ); + + # Refresh links of all pages including this page + # This will be in a separate transaction + if ( $this->mRecursive ) { + $this->queueRecursiveJobs(); + } + + wfProfileOut( $fname ); + } + + /** + * Link update which clears the previous entries and inserts new ones + * May be slower or faster depending on level of lock contention and write speed of DB + * Also useful where link table corruption needs to be repaired, e.g. in refreshLinks.php + */ + function doDumbUpdate() { + $fname = 'LinksUpdate::doDumbUpdate'; wfProfileIn( $fname ); - $del = array(); - $add = array(); + # Refresh category pages and image description pages + $existing = $this->getExistingCategories(); + $categoryUpdates = array_diff_assoc( $existing, $this->mCategories ) + array_diff_assoc( $this->mCategories, $existing ); + $existing = $this->getExistingImages(); + $imageUpdates = array_diff_key( $existing, $this->mImages ) + array_diff_key( $this->mImages, $existing ); + + $this->dumbTableUpdate( 'pagelinks', $this->getLinkInsertions(), 'pl_from' ); + $this->dumbTableUpdate( 'imagelinks', $this->getImageInsertions(), 'il_from' ); + $this->dumbTableUpdate( 'categorylinks', $this->getCategoryInsertions(), 'cl_from' ); + $this->dumbTableUpdate( 'templatelinks', $this->getTemplateInsertions(), 'tl_from' ); + $this->dumbTableUpdate( 'externallinks', $this->getExternalInsertions(), 'el_from' ); + $this->dumbTableUpdate( 'langlinks', $this->getInterlangInsertions(), 'll_from' ); + + # Update the cache of all the category pages and image description pages which were changed + $this->invalidateCategories( $categoryUpdates ); + $this->invalidateImageDescriptions( $imageUpdates ); + + # Refresh links of all pages including this page + # This will be in a separate transaction + if ( $this->mRecursive ) { + $this->queueRecursiveJobs(); + } + + wfProfileOut( $fname ); + } - $dbw =& wfGetDB( DB_MASTER ); - $links = $dbw->tableName( 'links' ); - $brokenlinks = $dbw->tableName( 'brokenlinks' ); - $imagelinks = $dbw->tableName( 'imagelinks' ); - $categorylinks = $dbw->tableName( 'categorylinks' ); + function queueRecursiveJobs() { + wfProfileIn( __METHOD__ ); - #------------------------------------------------------------------------------ - # Good links - - if ( $wgLinkCache->incrementalSetup( LINKCACHE_GOOD, $del, $add ) ) { - # Delete where necessary - if ( count( $del ) ) { - $sql = "DELETE FROM $links WHERE l_from={$this->mId} AND l_to IN(". - implode( ',', $del ) . ')'; - $dbw->query( $sql, $fname ); + $batchSize = 100; + $dbr =& wfGetDB( DB_SLAVE ); + $res = $dbr->select( array( 'templatelinks', 'page' ), + array( 'page_namespace', 'page_title' ), + array( + 'page_id=tl_from', + 'tl_namespace' => $this->mTitle->getNamespace(), + 'tl_title' => $this->mTitle->getDBkey() + ), __METHOD__ + ); + + $done = false; + while ( !$done ) { + $jobs = array(); + for ( $i = 0; $i < $batchSize; $i++ ) { + $row = $dbr->fetchObject( $res ); + if ( !$row ) { + $done = true; + break; + } + $title = Title::makeTitle( $row->page_namespace, $row->page_title ); + $jobs[] = Job::factory( 'refreshLinks', $title ); } - } else { - # Delete everything - $dbw->delete( 'links', array( 'l_from' => $this->mId ), $fname ); - - # Get the addition list - $add = $wgLinkCache->getGoodLinks(); + Job::batchInsert( $jobs ); + } + $dbr->freeResult( $res ); + wfProfileOut( __METHOD__ ); + } + + /** + * Invalidate the cache of a list of pages from a single namespace + * + * @param integer $namespace + * @param array $dbkeys + */ + function invalidatePages( $namespace, $dbkeys ) { + $fname = 'LinksUpdate::invalidatePages'; + + if ( !count( $dbkeys ) ) { + return; } + + /** + * Determine which pages need to be updated + * This is necessary to prevent the job queue from smashing the DB with + * large numbers of concurrent invalidations of the same page + */ + $now = $this->mDb->timestamp(); + $ids = array(); + $res = $this->mDb->select( 'page', array( 'page_id' ), + array( + 'page_namespace' => $namespace, + 'page_title IN (' . $this->mDb->makeList( $dbkeys ) . ')', + 'page_touched < ' . $this->mDb->addQuotes( $now ) + ), $fname + ); + while ( $row = $this->mDb->fetchObject( $res ) ) { + $ids[] = $row->page_id; + } + if ( !count( $ids ) ) { + return; + } + + /** + * Do the update + * We still need the page_touched condition, in case the row has changed since + * the non-locking select above. + */ + $this->mDb->update( 'page', array( 'page_touched' => $now ), + array( + 'page_id IN (' . $this->mDb->makeList( $ids ) . ')', + 'page_touched < ' . $this->mDb->addQuotes( $now ) + ), $fname + ); + } + + function invalidateCategories( $cats ) { + $this->invalidatePages( NS_CATEGORY, array_keys( $cats ) ); + } - # Do the insertion - if ( 0 != count( $add ) ) { - $arr=array(); - foreach($add as $lt=>$lid) - array_push($arr,array( - 'l_from'=>$this->mId, - 'l_to'=>$lid)); - # The link cache was constructed without FOR UPDATE, so there may be collisions - # Ignoring for now, I'm not sure if that causes problems or not, but I'm fairly - # sure it's better than without IGNORE - $dbw->insertArray('links', $arr, $fname, array('IGNORE')); + function invalidateImageDescriptions( $images ) { + $this->invalidatePages( NS_IMAGE, array_keys( $images ) ); + } + + function dumbTableUpdate( $table, $insertions, $fromField ) { + $fname = 'LinksUpdate::dumbTableUpdate'; + $this->mDb->delete( $table, array( $fromField => $this->mId ), $fname ); + if ( count( $insertions ) ) { + # The link array was constructed without FOR UPDATE, so there may be collisions + # This may cause minor link table inconsistencies, which is better than + # crippling the site with lock contention. + $this->mDb->insert( $table, $insertions, $fname, array( 'IGNORE' ) ); } + } - #------------------------------------------------------------------------------ - # Bad links - - if ( $wgLinkCache->incrementalSetup( LINKCACHE_BAD, $del, $add ) ) { - # Delete where necessary - if ( count( $del ) ) { - $sql = "DELETE FROM $brokenlinks WHERE bl_from={$this->mId} AND bl_to IN("; - $first = true; - foreach( $del as $badTitle ) { - if ( $first ) { - $first = false; - } else { - $sql .= ','; - } - $sql .= $dbw->addQuotes( $badTitle ); - } - $sql .= ')'; - $dbw->query( $sql, $fname ); + /** + * Make a WHERE clause from a 2-d NS/dbkey array + * + * @param array $arr 2-d array indexed by namespace and DB key + * @param string $prefix Field name prefix, without the underscore + */ + function makeWhereFrom2d( &$arr, $prefix ) { + $lb = new LinkBatch; + $lb->setArray( $arr ); + return $lb->constructSet( $prefix, $this->mDb ); + } + + /** + * Update a table by doing a delete query then an insert query + * @private + */ + function incrTableUpdate( $table, $prefix, $deletions, $insertions ) { + $fname = 'LinksUpdate::incrTableUpdate'; + $where = array( "{$prefix}_from" => $this->mId ); + if ( $table == 'pagelinks' || $table == 'templatelinks' ) { + $clause = $this->makeWhereFrom2d( $deletions, $prefix ); + if ( $clause ) { + $where[] = $clause; + } else { + $where = false; } } else { - # Delete all - $dbw->delete( 'brokenlinks', array( 'bl_from' => $this->mId ) ); - - # Get addition list - $add = $wgLinkCache->getBadLinks(); + if ( $table == 'langlinks' ) { + $toField = 'll_lang'; + } else { + $toField = $prefix . '_to'; + } + if ( count( $deletions ) ) { + $where[] = "$toField IN (" . $this->mDb->makeList( array_keys( $deletions ) ) . ')'; + } else { + $where = false; + } } + if ( $where ) { + $this->mDb->delete( $table, $where, $fname ); + } + if ( count( $insertions ) ) { + $this->mDb->insert( $table, $insertions, $fname, 'IGNORE' ); + } + } + - # Do additions - $sql = ''; - if ( 0 != count ( $add ) ) { - $arr=array(); - foreach( $add as $blt ) { - $blt = $dbw->strencode( $blt ); - array_push($arr,array( - 'bl_from'=>$this->mId, - 'bl_to'=>$blt)); + /** + * Get an array of pagelinks insertions for passing to the DB + * Skips the titles specified by the 2-D array $existing + * @private + */ + function getLinkInsertions( $existing = array() ) { + $arr = array(); + foreach( $this->mLinks as $ns => $dbkeys ) { + # array_diff_key() was introduced in PHP 5.1, there is a compatibility function + # in GlobalFunctions.php + $diffs = isset( $existing[$ns] ) ? array_diff_key( $dbkeys, $existing[$ns] ) : $dbkeys; + foreach ( $diffs as $dbk => $id ) { + $arr[] = array( + 'pl_from' => $this->mId, + 'pl_namespace' => $ns, + 'pl_title' => $dbk + ); } - $dbw->insertArray( 'brokenlinks',$arr,$fname,array('IGNORE')); } + return $arr; + } - #------------------------------------------------------------------------------ - # Image links - $sql = "DELETE FROM $imagelinks WHERE il_from='{$this->mId}'"; - $dbw->query( $sql, $fname ); - - # Get addition list - $add = $wgLinkCache->getImageLinks(); - - # Do the insertion - $sql = ''; - $image = Namespace::getImage(); - if ( 0 != count ( $add ) ) { - $arr = array(); - foreach ($add as $iname => $val ) { - $nt = Title::makeTitle( $image, $iname ); - if( !$nt ) continue; - $nt->invalidateCache(); - $iname = $dbw->strencode( $iname ); - array_push($arr,array( - 'il_from'=>$this->mId, - 'il_to'=>$iname)); + /** + * Get an array of template insertions. Like getLinkInsertions() + * @private + */ + function getTemplateInsertions( $existing = array() ) { + $arr = array(); + foreach( $this->mTemplates as $ns => $dbkeys ) { + $diffs = isset( $existing[$ns] ) ? array_diff_key( $dbkeys, $existing[$ns] ) : $dbkeys; + foreach ( $diffs as $dbk => $id ) { + $arr[] = array( + 'tl_from' => $this->mId, + 'tl_namespace' => $ns, + 'tl_title' => $dbk + ); } - $dbw->insertArray($imagelinks, $arr, $fname, array('IGNORE')); } + return $arr; + } - #------------------------------------------------------------------------------ - # Category links - if( $wgUseCategoryMagic ) { - $sql = "DELETE FROM $categorylinks WHERE cl_from='{$this->mId}'"; - $dbw->query( $sql, $fname ); - - # Get addition list - $add = $wgLinkCache->getCategoryLinks(); - - # Do the insertion - $sql = ''; - if ( 0 != count ( $add ) ) { - $arr=array(); - foreach( $add as $cname => $sortkey ) { - $nt = Title::makeTitle( NS_CATEGORY, $cname ); - if( !$nt ) continue; - $nt->invalidateCache(); - array_push($arr,array( - 'cl_from'=>$this->mId, - 'cl_to'=>$dbw->strencode( $cname ), - 'cl_sortkey'=>$dbw->strencode( $sortkey ))); - } - $dbw->insertArray($categorylinks,$arr,$fname,array('IGNORE')); - } + /** + * Get an array of image insertions + * Skips the names specified in $existing + * @private + */ + function getImageInsertions( $existing = array() ) { + $arr = array(); + $diffs = array_diff_key( $this->mImages, $existing ); + foreach( $diffs as $iname => $dummy ) { + $arr[] = array( + 'il_from' => $this->mId, + 'il_to' => $iname + ); } - - $this->fixBrokenLinks(); + return $arr; + } - wfProfileOut( $fname ); + /** + * Get an array of externallinks insertions. Skips the names specified in $existing + * @private + */ + function getExternalInsertions( $existing = array() ) { + $arr = array(); + $diffs = array_diff_key( $this->mExternals, $existing ); + foreach( $diffs as $url => $dummy ) { + $arr[] = array( + 'el_from' => $this->mId, + 'el_to' => $url, + 'el_index' => wfMakeUrlIndex( $url ), + ); + } + return $arr; } - - function doDumbUpdate() - { - # Old inefficient update function - # Used for rebuilding the link table - global $wgLinkCache, $wgDBtransactions, $wgUseCategoryMagic; - $fname = 'LinksUpdate::doDumbUpdate'; - wfProfileIn( $fname ); - - - $dbw =& wfGetDB( DB_MASTER ); - $links = $dbw->tableName( 'links' ); - $brokenlinks = $dbw->tableName( 'brokenlinks' ); - $imagelinks = $dbw->tableName( 'imagelinks' ); - $categorylinks = $dbw->tableName( 'categorylinks' ); - - $sql = "DELETE FROM $links WHERE l_from={$this->mId}"; - $dbw->query( $sql, $fname ); - - $a = $wgLinkCache->getGoodLinks(); - if ( 0 != count( $a ) ) { - $arr=array(); - foreach( $a as $lt => $lid ) { - array_push($arr,array( - 'l_from'=>$this->mId, - 'l_to'=>$lid)); + + /** + * Get an array of category insertions + * @param array $existing Array mapping existing category names to sort keys. If both + * match a link in $this, the link will be omitted from the output + * @private + */ + function getCategoryInsertions( $existing = array() ) { + $diffs = array_diff_assoc( $this->mCategories, $existing ); + $arr = array(); + foreach ( $diffs as $name => $sortkey ) { + $arr[] = array( + 'cl_from' => $this->mId, + 'cl_to' => $name, + 'cl_sortkey' => $sortkey, + 'cl_timestamp' => $this->mDb->timestamp() + ); + } + return $arr; + } + + /** + * Get an array of interlanguage link insertions + * @param array $existing Array mapping existing language codes to titles + * @private + */ + function getInterlangInsertions( $existing = array() ) { + $diffs = array_diff_assoc( $this->mInterlangs, $existing ); + $arr = array(); + foreach( $diffs as $lang => $title ) { + $arr[] = array( + 'll_from' => $this->mId, + 'll_lang' => $lang, + 'll_title' => $title + ); + } + return $arr; + } + + /** + * Given an array of existing links, returns those links which are not in $this + * and thus should be deleted. + * @private + */ + function getLinkDeletions( $existing ) { + $del = array(); + foreach ( $existing as $ns => $dbkeys ) { + if ( isset( $this->mLinks[$ns] ) ) { + $del[$ns] = array_diff_key( $existing[$ns], $this->mLinks[$ns] ); + } else { + $del[$ns] = $existing[$ns]; } - $dbw->insertArray($links,$arr,$fname,array('IGNORE')); } + return $del; + } - $sql = "DELETE FROM $brokenlinks WHERE bl_from={$this->mId}"; - $dbw->query( $sql, $fname ); - - $a = $wgLinkCache->getBadLinks(); - if ( 0 != count ( $a ) ) { - $arr=array(); - foreach( $a as $blt ) { - $blt = $dbw->strencode( $blt ); - array_push($arr,array( - 'bl_from'=>$this->mId, - 'bl_to'=>$blt)); + /** + * Given an array of existing templates, returns those templates which are not in $this + * and thus should be deleted. + * @private + */ + function getTemplateDeletions( $existing ) { + $del = array(); + foreach ( $existing as $ns => $dbkeys ) { + if ( isset( $this->mTemplates[$ns] ) ) { + $del[$ns] = array_diff_key( $existing[$ns], $this->mTemplates[$ns] ); + } else { + $del[$ns] = $existing[$ns]; } - $dbw->insertArray($brokenlinks,$arr,$fname,array('IGNORE')); } - - $sql = "DELETE FROM $imagelinks WHERE il_from={$this->mId}"; - $dbw->query( $sql, $fname ); - - $a = $wgLinkCache->getImageLinks(); - $sql = ''; - if ( 0 != count ( $a ) ) { - $arr=array(); - foreach( $a as $iname => $val ) - array_push($arr,array( - 'il_from'=>$this->mId, - 'il_to'=>$dbw->strencode( $iname ))); - $dbw->insertArray($imagelinks,$arr,$fname,array('IGNORE')); + return $del; + } + + /** + * Given an array of existing images, returns those images which are not in $this + * and thus should be deleted. + * @private + */ + function getImageDeletions( $existing ) { + return array_diff_key( $existing, $this->mImages ); + } + + /** + * Given an array of existing external links, returns those links which are not + * in $this and thus should be deleted. + * @private + */ + function getExternalDeletions( $existing ) { + return array_diff_key( $existing, $this->mExternals ); + } + + /** + * Given an array of existing categories, returns those categories which are not in $this + * and thus should be deleted. + * @private + */ + function getCategoryDeletions( $existing ) { + return array_diff_assoc( $existing, $this->mCategories ); + } + + /** + * Given an array of existing interlanguage links, returns those links which are not + * in $this and thus should be deleted. + * @private + */ + function getInterlangDeletions( $existing ) { + return array_diff_assoc( $existing, $this->mInterlangs ); + } + + /** + * Get an array of existing links, as a 2-D array + * @private + */ + function getExistingLinks() { + $fname = 'LinksUpdate::getExistingLinks'; + $res = $this->mDb->select( 'pagelinks', array( 'pl_namespace', 'pl_title' ), + array( 'pl_from' => $this->mId ), $fname, $this->mOptions ); + $arr = array(); + while ( $row = $this->mDb->fetchObject( $res ) ) { + if ( !isset( $arr[$row->pl_namespace] ) ) { + $arr[$row->pl_namespace] = array(); + } + $arr[$row->pl_namespace][$row->pl_title] = 1; } + $this->mDb->freeResult( $res ); + return $arr; + } - if( $wgUseCategoryMagic ) { - $sql = "DELETE FROM $categorylinks WHERE cl_from='{$this->mId}'"; - $dbw->query( $sql, $fname ); - - # Get addition list - $add = $wgLinkCache->getCategoryLinks(); - - # Do the insertion - $sql = ''; - if ( 0 != count ( $add ) ) { - $arr=array(); - foreach( $add as $cname => $sortkey ) { - # FIXME: Change all this to avoid unnecessary duplication - $nt = Title::makeTitle( NS_CATEGORY, $cname ); - if( !$nt ) continue; - $nt->invalidateCache(); - array_push($arr,array( - 'cl_from'=>$this->mId, - 'cl_to'=>$dbw->strencode( $cname ), - 'cl_sortkey'=>$dbw->strencode( $sortkey ))); - } - $dbw->insertArray($categorylinks,$arr,$fname,array('IGNORE')); + /** + * Get an array of existing templates, as a 2-D array + * @private + */ + function getExistingTemplates() { + $fname = 'LinksUpdate::getExistingTemplates'; + $res = $this->mDb->select( 'templatelinks', array( 'tl_namespace', 'tl_title' ), + array( 'tl_from' => $this->mId ), $fname, $this->mOptions ); + $arr = array(); + while ( $row = $this->mDb->fetchObject( $res ) ) { + if ( !isset( $arr[$row->tl_namespace] ) ) { + $arr[$row->tl_namespace] = array(); } + $arr[$row->tl_namespace][$row->tl_title] = 1; } - $this->fixBrokenLinks(); - wfProfileOut( $fname ); + $this->mDb->freeResult( $res ); + return $arr; } - - function fixBrokenLinks() { - /* Update any brokenlinks *to* this page */ - /* Call for a newly created page, or just to make sure state is consistent */ - $fname = 'LinksUpdate::fixBrokenLinks'; - - $dbw =& wfGetDB( DB_MASTER ); - $cur = $dbw->tableName( 'cur' ); - $links = $dbw->tableName( 'links' ); - - $res = $dbw->select( 'brokenlinks', array( 'bl_from' ), array( 'bl_to' => $this->mTitle ), - $fname, 'FOR UPDATE' ); - if ( 0 == $dbw->numRows( $res ) ) { return; } - - # Ignore errors. If a link existed in both the brokenlinks table and the links - # table, that's an error which can be fixed at this stage by simply ignoring collisions - $arr=array(); - $now = $dbw->timestamp(); - $sql2 = "UPDATE $cur SET cur_touched='{$now}' WHERE cur_id IN ("; - $first = true; - while ( $row = $dbw->fetchObject( $res ) ) { - if ( ! $first ) { $sql2 .= ","; } - $first = false; - array_push($arr,array('l_from'=>$row->bl_from,'l_to'=>$this->mId)); - $sql2 .= $row->bl_from; + + /** + * Get an array of existing images, image names in the keys + * @private + */ + function getExistingImages() { + $fname = 'LinksUpdate::getExistingImages'; + $res = $this->mDb->select( 'imagelinks', array( 'il_to' ), + array( 'il_from' => $this->mId ), $fname, $this->mOptions ); + $arr = array(); + while ( $row = $this->mDb->fetchObject( $res ) ) { + $arr[$row->il_to] = 1; } - $sql2 .= ')'; - $dbw->insertArray($links,$arr,$fname,array('IGNORE')); - $dbw->query( $sql2, $fname ); - $dbw->delete( 'brokenlinks', array( 'bl_to' => $this->mTitle ), $fname ); + $this->mDb->freeResult( $res ); + return $arr; + } + + /** + * Get an array of existing external links, URLs in the keys + * @private + */ + function getExistingExternals() { + $fname = 'LinksUpdate::getExistingExternals'; + $res = $this->mDb->select( 'externallinks', array( 'el_to' ), + array( 'el_from' => $this->mId ), $fname, $this->mOptions ); + $arr = array(); + while ( $row = $this->mDb->fetchObject( $res ) ) { + $arr[$row->el_to] = 1; + } + $this->mDb->freeResult( $res ); + return $arr; + } + + /** + * Get an array of existing categories, with the name in the key and sort key in the value. + * @private + */ + function getExistingCategories() { + $fname = 'LinksUpdate::getExistingCategories'; + $res = $this->mDb->select( 'categorylinks', array( 'cl_to', 'cl_sortkey' ), + array( 'cl_from' => $this->mId ), $fname, $this->mOptions ); + $arr = array(); + while ( $row = $this->mDb->fetchObject( $res ) ) { + $arr[$row->cl_to] = $row->cl_sortkey; + } + $this->mDb->freeResult( $res ); + return $arr; } -} + /** + * Get an array of existing interlanguage links, with the language code in the key and the + * title in the value. + * @private + */ + function getExistingInterlangs() { + $fname = 'LinksUpdate::getExistingInterlangs'; + $res = $this->mDb->select( 'langlinks', array( 'll_lang', 'll_title' ), + array( 'll_from' => $this->mId ), $fname, $this->mOptions ); + $arr = array(); + while ( $row = $this->mDb->fetchObject( $res ) ) { + $arr[$row->ll_lang] = $row->ll_title; + } + return $arr; + } +} ?>