696 lines
21 KiB
PHP
696 lines
21 KiB
PHP
<?php
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/**
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* See docs/deferred.txt
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*
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* @todo document (e.g. one-sentence top-level class description).
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*/
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class LinksUpdate {
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/**@{{
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* @private
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*/
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var $mId, //!< Page ID of the article linked from
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$mTitle, //!< Title object of the article linked from
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$mLinks, //!< Map of title strings to IDs for the links in the document
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$mImages, //!< DB keys of the images used, in the array key only
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$mTemplates, //!< Map of title strings to IDs for the template references, including broken ones
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$mExternals, //!< URLs of external links, array key only
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$mCategories, //!< Map of category names to sort keys
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$mInterlangs, //!< Map of language codes to titles
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$mProperties, //!< Map of arbitrary name to value
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$mDb, //!< Database connection reference
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$mOptions, //!< SELECT options to be used (array)
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$mRecursive; //!< Whether to queue jobs for recursive updates
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/**@}}*/
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/**
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* Constructor
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*
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* @param Title $title Title of the page we're updating
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* @param ParserOutput $parserOutput Output from a full parse of this page
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* @param bool $recursive Queue jobs for recursive updates?
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*/
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function LinksUpdate( $title, $parserOutput, $recursive = true ) {
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global $wgAntiLockFlags;
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if ( $wgAntiLockFlags & ALF_NO_LINK_LOCK ) {
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$this->mOptions = array();
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} else {
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$this->mOptions = array( 'FOR UPDATE' );
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}
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$this->mDb = wfGetDB( DB_MASTER );
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if ( !is_object( $title ) ) {
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throw new MWException( "The calling convention to LinksUpdate::LinksUpdate() has changed. " .
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"Please see Article::editUpdates() for an invocation example.\n" );
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}
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$this->mTitle = $title;
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$this->mId = $title->getArticleID();
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$this->mParserOutput = $parserOutput;
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$this->mLinks = $parserOutput->getLinks();
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$this->mImages = $parserOutput->getImages();
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$this->mTemplates = $parserOutput->getTemplates();
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$this->mExternals = $parserOutput->getExternalLinks();
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$this->mCategories = $parserOutput->getCategories();
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$this->mProperties = $parserOutput->getProperties();
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# Convert the format of the interlanguage links
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# I didn't want to change it in the ParserOutput, because that array is passed all
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# the way back to the skin, so either a skin API break would be required, or an
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# inefficient back-conversion.
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$ill = $parserOutput->getLanguageLinks();
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$this->mInterlangs = array();
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foreach ( $ill as $link ) {
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list( $key, $title ) = explode( ':', $link, 2 );
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$this->mInterlangs[$key] = $title;
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}
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$this->mRecursive = $recursive;
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$this->mTouchTmplLinks = false;
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wfRunHooks( 'LinksUpdateConstructed', array( &$this ) );
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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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*/
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public function doUpdate() {
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global $wgUseDumbLinkUpdate;
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wfRunHooks( 'LinksUpdate', array( &$this ) );
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if ( $wgUseDumbLinkUpdate ) {
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$this->doDumbUpdate();
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} else {
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$this->doIncrementalUpdate();
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}
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wfRunHooks( 'LinksUpdateComplete', array( &$this ) );
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}
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protected function doIncrementalUpdate() {
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wfProfileIn( __METHOD__ );
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# Page links
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$existing = $this->getExistingLinks();
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$this->incrTableUpdate( 'pagelinks', 'pl', $this->getLinkDeletions( $existing ),
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$this->getLinkInsertions( $existing ) );
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# Image links
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$existing = $this->getExistingImages();
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$imageDeletes = $this->getImageDeletions( $existing );
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$this->incrTableUpdate( 'imagelinks', 'il', $imageDeletes, $this->getImageInsertions( $existing ) );
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# Invalidate all image description pages which had links added or removed
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$imageUpdates = $imageDeletes + array_diff_key( $this->mImages, $existing );
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$this->invalidateImageDescriptions( $imageUpdates );
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# External links
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$existing = $this->getExistingExternals();
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$this->incrTableUpdate( 'externallinks', 'el', $this->getExternalDeletions( $existing ),
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$this->getExternalInsertions( $existing ) );
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# Language links
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$existing = $this->getExistingInterlangs();
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$this->incrTableUpdate( 'langlinks', 'll', $this->getInterlangDeletions( $existing ),
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$this->getInterlangInsertions( $existing ) );
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# Template links
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$existing = $this->getExistingTemplates();
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$this->incrTableUpdate( 'templatelinks', 'tl', $this->getTemplateDeletions( $existing ),
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$this->getTemplateInsertions( $existing ) );
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# Category links
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$existing = $this->getExistingCategories();
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$categoryDeletes = $this->getCategoryDeletions( $existing );
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$this->incrTableUpdate( 'categorylinks', 'cl', $categoryDeletes, $this->getCategoryInsertions( $existing ) );
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# Invalidate all categories which were added, deleted or changed (set symmetric difference)
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$categoryInserts = array_diff_assoc( $this->mCategories, $existing );
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$categoryUpdates = $categoryInserts + $categoryDeletes;
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$this->invalidateCategories( $categoryUpdates );
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$this->updateCategoryCounts( $categoryInserts, $categoryDeletes );
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# Page properties
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$existing = $this->getExistingProperties();
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$propertiesDeletes = $this->getPropertyDeletions( $existing );
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$this->incrTableUpdate( 'page_props', 'pp', $propertiesDeletes, $this->getPropertyInsertions( $existing ) );
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# Invalidate the necessary pages
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$changed = $propertiesDeletes + array_diff_assoc( $this->mProperties, $existing );
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$this->invalidateProperties( $changed );
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# Refresh links of all pages including this page
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# This will be in a separate transaction
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if ( $this->mRecursive ) {
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$this->queueRecursiveJobs();
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}
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wfProfileOut( __METHOD__ );
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}
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/**
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* Link update which clears the previous entries and inserts new ones
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* May be slower or faster depending on level of lock contention and write speed of DB
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* Also useful where link table corruption needs to be repaired, e.g. in refreshLinks.php
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*/
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protected function doDumbUpdate() {
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wfProfileIn( __METHOD__ );
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# Refresh category pages and image description pages
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$existing = $this->getExistingCategories();
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$categoryInserts = array_diff_assoc( $this->mCategories, $existing );
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$categoryDeletes = array_diff_assoc( $existing, $this->mCategories );
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$categoryUpdates = $categoryInserts + $categoryDeletes;
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$existing = $this->getExistingImages();
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$imageUpdates = array_diff_key( $existing, $this->mImages ) + array_diff_key( $this->mImages, $existing );
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$this->dumbTableUpdate( 'pagelinks', $this->getLinkInsertions(), 'pl_from' );
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$this->dumbTableUpdate( 'imagelinks', $this->getImageInsertions(), 'il_from' );
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$this->dumbTableUpdate( 'categorylinks', $this->getCategoryInsertions(), 'cl_from' );
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$this->dumbTableUpdate( 'templatelinks', $this->getTemplateInsertions(), 'tl_from' );
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$this->dumbTableUpdate( 'externallinks', $this->getExternalInsertions(), 'el_from' );
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$this->dumbTableUpdate( 'langlinks', $this->getInterlangInsertions(),'ll_from' );
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$this->dumbTableUpdate( 'page_props', $this->getPropertyInsertions(), 'pp_page' );
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# Update the cache of all the category pages and image description
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# pages which were changed, and fix the category table count
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$this->invalidateCategories( $categoryUpdates );
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$this->updateCategoryCounts( $categoryInserts, $categoryDeletes );
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$this->invalidateImageDescriptions( $imageUpdates );
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# Refresh links of all pages including this page
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# This will be in a separate transaction
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if ( $this->mRecursive ) {
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$this->queueRecursiveJobs();
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}
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wfProfileOut( __METHOD__ );
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}
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function queueRecursiveJobs() {
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global $wgUpdateRowsPerJob;
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wfProfileIn( __METHOD__ );
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$cache = $this->mTitle->getBacklinkCache();
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$batches = $cache->partition( 'templatelinks', $wgUpdateRowsPerJob );
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if ( !$batches ) {
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wfProfileOut( __METHOD__ );
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return;
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}
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$jobs = array();
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foreach ( $batches as $batch ) {
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list( $start, $end ) = $batch;
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$params = array(
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'start' => $start,
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'end' => $end,
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);
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$jobs[] = new RefreshLinksJob2( $this->mTitle, $params );
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}
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Job::batchInsert( $jobs );
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wfProfileOut( __METHOD__ );
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}
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/**
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* Invalidate the cache of a list of pages from a single namespace
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*
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* @param integer $namespace
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* @param array $dbkeys
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*/
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function invalidatePages( $namespace, $dbkeys ) {
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if ( !count( $dbkeys ) ) {
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return;
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}
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/**
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* Determine which pages need to be updated
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* This is necessary to prevent the job queue from smashing the DB with
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* large numbers of concurrent invalidations of the same page
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*/
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$now = $this->mDb->timestamp();
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$ids = array();
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$res = $this->mDb->select( 'page', array( 'page_id' ),
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array(
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'page_namespace' => $namespace,
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'page_title IN (' . $this->mDb->makeList( $dbkeys ) . ')',
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'page_touched < ' . $this->mDb->addQuotes( $now )
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), __METHOD__
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);
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while ( $row = $this->mDb->fetchObject( $res ) ) {
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$ids[] = $row->page_id;
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}
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if ( !count( $ids ) ) {
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return;
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}
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/**
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* Do the update
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* We still need the page_touched condition, in case the row has changed since
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* the non-locking select above.
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*/
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$this->mDb->update( 'page', array( 'page_touched' => $now ),
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array(
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'page_id IN (' . $this->mDb->makeList( $ids ) . ')',
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'page_touched < ' . $this->mDb->addQuotes( $now )
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), __METHOD__
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);
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}
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function invalidateCategories( $cats ) {
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$this->invalidatePages( NS_CATEGORY, array_keys( $cats ) );
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}
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/**
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* Update all the appropriate counts in the category table.
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* @param $added associative array of category name => sort key
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* @param $deleted associative array of category name => sort key
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*/
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function updateCategoryCounts( $added, $deleted ) {
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$a = new Article($this->mTitle);
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$a->updateCategoryCounts(
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array_keys( $added ), array_keys( $deleted )
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);
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}
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function invalidateImageDescriptions( $images ) {
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$this->invalidatePages( NS_FILE, array_keys( $images ) );
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}
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function dumbTableUpdate( $table, $insertions, $fromField ) {
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$this->mDb->delete( $table, array( $fromField => $this->mId ), __METHOD__ );
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if ( count( $insertions ) ) {
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# The link array was constructed without FOR UPDATE, so there may
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# be collisions. This may cause minor link table inconsistencies,
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# which is better than crippling the site with lock contention.
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$this->mDb->insert( $table, $insertions, __METHOD__, array( 'IGNORE' ) );
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}
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}
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/**
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* Make a WHERE clause from a 2-d NS/dbkey array
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*
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* @param array $arr 2-d array indexed by namespace and DB key
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* @param string $prefix Field name prefix, without the underscore
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*/
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function makeWhereFrom2d( &$arr, $prefix ) {
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$lb = new LinkBatch;
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$lb->setArray( $arr );
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return $lb->constructSet( $prefix, $this->mDb );
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}
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/**
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* Update a table by doing a delete query then an insert query
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* @private
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*/
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function incrTableUpdate( $table, $prefix, $deletions, $insertions ) {
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if ( $table == 'page_props' ) {
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$fromField = 'pp_page';
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} else {
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$fromField = "{$prefix}_from";
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}
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$where = array( $fromField => $this->mId );
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if ( $table == 'pagelinks' || $table == 'templatelinks' ) {
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$clause = $this->makeWhereFrom2d( $deletions, $prefix );
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if ( $clause ) {
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$where[] = $clause;
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} else {
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$where = false;
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}
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} else {
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if ( $table == 'langlinks' ) {
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$toField = 'll_lang';
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} elseif ( $table == 'page_props' ) {
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$toField = 'pp_propname';
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} else {
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$toField = $prefix . '_to';
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}
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if ( count( $deletions ) ) {
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$where[] = "$toField IN (" . $this->mDb->makeList( array_keys( $deletions ) ) . ')';
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} else {
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$where = false;
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}
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}
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if ( $where ) {
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$this->mDb->delete( $table, $where, __METHOD__ );
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}
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if ( count( $insertions ) ) {
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$this->mDb->insert( $table, $insertions, __METHOD__, 'IGNORE' );
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}
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}
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/**
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* Get an array of pagelinks insertions for passing to the DB
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* Skips the titles specified by the 2-D array $existing
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* @private
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*/
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function getLinkInsertions( $existing = array() ) {
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$arr = array();
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foreach( $this->mLinks as $ns => $dbkeys ) {
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# array_diff_key() was introduced in PHP 5.1, there is a compatibility function
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# in GlobalFunctions.php
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$diffs = isset( $existing[$ns] ) ? array_diff_key( $dbkeys, $existing[$ns] ) : $dbkeys;
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foreach ( $diffs as $dbk => $id ) {
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$arr[] = array(
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'pl_from' => $this->mId,
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'pl_namespace' => $ns,
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'pl_title' => $dbk
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);
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}
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}
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return $arr;
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}
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/**
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* Get an array of template insertions. Like getLinkInsertions()
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* @private
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*/
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function getTemplateInsertions( $existing = array() ) {
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$arr = array();
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foreach( $this->mTemplates as $ns => $dbkeys ) {
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$diffs = isset( $existing[$ns] ) ? array_diff_key( $dbkeys, $existing[$ns] ) : $dbkeys;
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foreach ( $diffs as $dbk => $id ) {
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$arr[] = array(
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'tl_from' => $this->mId,
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'tl_namespace' => $ns,
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'tl_title' => $dbk
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);
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}
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}
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return $arr;
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}
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/**
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* Get an array of image insertions
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* Skips the names specified in $existing
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* @private
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*/
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function getImageInsertions( $existing = array() ) {
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$arr = array();
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$diffs = array_diff_key( $this->mImages, $existing );
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foreach( $diffs as $iname => $dummy ) {
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$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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}
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return $arr;
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}
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/**
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* Get an array of externallinks insertions. Skips the names specified in $existing
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* @private
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*/
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function getExternalInsertions( $existing = array() ) {
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$arr = array();
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$diffs = array_diff_key( $this->mExternals, $existing );
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foreach( $diffs as $url => $dummy ) {
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$arr[] = array(
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'el_from' => $this->mId,
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'el_to' => $url,
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'el_index' => wfMakeUrlIndex( $url ),
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);
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}
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return $arr;
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}
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/**
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* Get an array of category insertions
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* @param array $existing Array mapping existing category names to sort keys. If both
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* match a link in $this, the link will be omitted from the output
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* @private
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*/
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function getCategoryInsertions( $existing = array() ) {
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global $wgContLang;
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$diffs = array_diff_assoc( $this->mCategories, $existing );
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$arr = array();
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foreach ( $diffs as $name => $sortkey ) {
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$nt = Title::makeTitleSafe( NS_CATEGORY, $name );
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$wgContLang->findVariantLink( $name, $nt, true );
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$arr[] = array(
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'cl_from' => $this->mId,
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'cl_to' => $name,
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'cl_sortkey' => $sortkey,
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'cl_timestamp' => $this->mDb->timestamp()
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);
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}
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return $arr;
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}
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/**
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* Get an array of interlanguage link insertions
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* @param array $existing Array mapping existing language codes to titles
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* @private
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*/
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function getInterlangInsertions( $existing = array() ) {
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$diffs = array_diff_assoc( $this->mInterlangs, $existing );
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$arr = array();
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foreach( $diffs as $lang => $title ) {
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$arr[] = array(
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'll_from' => $this->mId,
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'll_lang' => $lang,
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'll_title' => $title
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);
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}
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return $arr;
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}
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/**
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* Get an array of page property insertions
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*/
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function getPropertyInsertions( $existing = array() ) {
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$diffs = array_diff_assoc( $this->mProperties, $existing );
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$arr = array();
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foreach ( $diffs as $name => $value ) {
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$arr[] = array(
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'pp_page' => $this->mId,
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'pp_propname' => $name,
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'pp_value' => $value,
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);
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}
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return $arr;
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}
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/**
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* Given an array of existing links, returns those links which are not in $this
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* and thus should be deleted.
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* @private
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*/
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function getLinkDeletions( $existing ) {
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$del = array();
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foreach ( $existing as $ns => $dbkeys ) {
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if ( isset( $this->mLinks[$ns] ) ) {
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$del[$ns] = array_diff_key( $existing[$ns], $this->mLinks[$ns] );
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} else {
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$del[$ns] = $existing[$ns];
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}
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}
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return $del;
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}
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/**
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* Given an array of existing templates, returns those templates which are not in $this
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* and thus should be deleted.
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* @private
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*/
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|
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];
|
|
}
|
|
}
|
|
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 array of properties which should be deleted.
|
|
* @private
|
|
*/
|
|
function getPropertyDeletions( $existing ) {
|
|
return array_diff_assoc( $existing, $this->mProperties );
|
|
}
|
|
|
|
/**
|
|
* Get an array of existing links, as a 2-D array
|
|
* @private
|
|
*/
|
|
function getExistingLinks() {
|
|
$res = $this->mDb->select( 'pagelinks', array( 'pl_namespace', 'pl_title' ),
|
|
array( 'pl_from' => $this->mId ), __METHOD__, $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;
|
|
}
|
|
|
|
/**
|
|
* Get an array of existing templates, as a 2-D array
|
|
* @private
|
|
*/
|
|
function getExistingTemplates() {
|
|
$res = $this->mDb->select( 'templatelinks', array( 'tl_namespace', 'tl_title' ),
|
|
array( 'tl_from' => $this->mId ), __METHOD__, $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->mDb->freeResult( $res );
|
|
return $arr;
|
|
}
|
|
|
|
/**
|
|
* Get an array of existing images, image names in the keys
|
|
* @private
|
|
*/
|
|
function getExistingImages() {
|
|
$res = $this->mDb->select( 'imagelinks', array( 'il_to' ),
|
|
array( 'il_from' => $this->mId ), __METHOD__, $this->mOptions );
|
|
$arr = array();
|
|
while ( $row = $this->mDb->fetchObject( $res ) ) {
|
|
$arr[$row->il_to] = 1;
|
|
}
|
|
$this->mDb->freeResult( $res );
|
|
return $arr;
|
|
}
|
|
|
|
/**
|
|
* Get an array of existing external links, URLs in the keys
|
|
* @private
|
|
*/
|
|
function getExistingExternals() {
|
|
$res = $this->mDb->select( 'externallinks', array( 'el_to' ),
|
|
array( 'el_from' => $this->mId ), __METHOD__, $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() {
|
|
$res = $this->mDb->select( 'categorylinks', array( 'cl_to', 'cl_sortkey' ),
|
|
array( 'cl_from' => $this->mId ), __METHOD__, $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() {
|
|
$res = $this->mDb->select( 'langlinks', array( 'll_lang', 'll_title' ),
|
|
array( 'll_from' => $this->mId ), __METHOD__, $this->mOptions );
|
|
$arr = array();
|
|
while ( $row = $this->mDb->fetchObject( $res ) ) {
|
|
$arr[$row->ll_lang] = $row->ll_title;
|
|
}
|
|
return $arr;
|
|
}
|
|
|
|
/**
|
|
* Get an array of existing categories, with the name in the key and sort key in the value.
|
|
* @private
|
|
*/
|
|
function getExistingProperties() {
|
|
$res = $this->mDb->select( 'page_props', array( 'pp_propname', 'pp_value' ),
|
|
array( 'pp_page' => $this->mId ), __METHOD__, $this->mOptions );
|
|
$arr = array();
|
|
while ( $row = $this->mDb->fetchObject( $res ) ) {
|
|
$arr[$row->pp_propname] = $row->pp_value;
|
|
}
|
|
$this->mDb->freeResult( $res );
|
|
return $arr;
|
|
}
|
|
|
|
|
|
/**
|
|
* Return the title object of the page being updated
|
|
*/
|
|
function getTitle() {
|
|
return $this->mTitle;
|
|
}
|
|
|
|
/**
|
|
* Invalidate any necessary link lists related to page property changes
|
|
*/
|
|
function invalidateProperties( $changed ) {
|
|
global $wgPagePropLinkInvalidations;
|
|
|
|
foreach ( $changed as $name => $value ) {
|
|
if ( isset( $wgPagePropLinkInvalidations[$name] ) ) {
|
|
$inv = $wgPagePropLinkInvalidations[$name];
|
|
if ( !is_array( $inv ) ) {
|
|
$inv = array( $inv );
|
|
}
|
|
foreach ( $inv as $table ) {
|
|
$update = new HTMLCacheUpdate( $this->mTitle, $table );
|
|
$update->doUpdate();
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|