+++ /dev/null
-<?php
-
-/**
- * Class representing a list of titles
- * The execute() method checks them all for existence and adds them to a LinkCache object
- *
- * @ingroup Cache
- */
-class LinkBatch {
- /**
- * 2-d array, first index namespace, second index dbkey, value arbitrary
- */
- var $data = array();
-
- /**
- * For debugging which method is using this class.
- */
- protected $caller;
-
- function __construct( $arr = array() ) {
- foreach( $arr as $item ) {
- $this->addObj( $item );
- }
- }
-
- /**
- * Use ->setCaller( __METHOD__ ) to indicate which code is using this
- * class. Only used in debugging output.
- * @since 1.17
- */
- public function setCaller( $caller ) {
- $this->caller = $caller;
- }
-
- public function addObj( $title ) {
- if ( is_object( $title ) ) {
- $this->add( $title->getNamespace(), $title->getDBkey() );
- } else {
- wfDebug( "Warning: LinkBatch::addObj got invalid title object\n" );
- }
- }
-
- public function add( $ns, $dbkey ) {
- if ( $ns < 0 ) {
- return;
- }
- if ( !array_key_exists( $ns, $this->data ) ) {
- $this->data[$ns] = array();
- }
-
- $this->data[$ns][str_replace( ' ', '_', $dbkey )] = 1;
- }
-
- /**
- * Set the link list to a given 2-d array
- * First key is the namespace, second is the DB key, value arbitrary
- */
- public function setArray( $array ) {
- $this->data = $array;
- }
-
- /**
- * Returns true if no pages have been added, false otherwise.
- */
- public function isEmpty() {
- return ($this->getSize() == 0);
- }
-
- /**
- * Returns the size of the batch.
- */
- public function getSize() {
- return count( $this->data );
- }
-
- /**
- * Do the query and add the results to the LinkCache object
- * Return an array mapping PDBK to ID
- */
- public function execute() {
- $linkCache = LinkCache::singleton();
- return $this->executeInto( $linkCache );
- }
-
- /**
- * Do the query and add the results to a given LinkCache object
- * Return an array mapping PDBK to ID
- */
- protected function executeInto( &$cache ) {
- wfProfileIn( __METHOD__ );
- $res = $this->doQuery();
- $ids = $this->addResultToCache( $cache, $res );
- wfProfileOut( __METHOD__ );
- return $ids;
- }
-
- /**
- * Add a ResultWrapper containing IDs and titles to a LinkCache object.
- * As normal, titles will go into the static Title cache field.
- * This function *also* stores extra fields of the title used for link
- * parsing to avoid extra DB queries.
- */
- public function addResultToCache( $cache, $res ) {
- if ( !$res ) {
- return array();
- }
-
- // For each returned entry, add it to the list of good links, and remove it from $remaining
-
- $ids = array();
- $remaining = $this->data;
- foreach ( $res as $row ) {
- $title = Title::makeTitle( $row->page_namespace, $row->page_title );
- $cache->addGoodLinkObj( $row->page_id, $title, $row->page_len, $row->page_is_redirect, $row->page_latest );
- $ids[$title->getPrefixedDBkey()] = $row->page_id;
- unset( $remaining[$row->page_namespace][$row->page_title] );
- }
-
- // The remaining links in $data are bad links, register them as such
- foreach ( $remaining as $ns => $dbkeys ) {
- foreach ( $dbkeys as $dbkey => $unused ) {
- $title = Title::makeTitle( $ns, $dbkey );
- $cache->addBadLinkObj( $title );
- $ids[$title->getPrefixedDBkey()] = 0;
- }
- }
- return $ids;
- }
-
- /**
- * Perform the existence test query, return a ResultWrapper with page_id fields
- */
- public function doQuery() {
- if ( $this->isEmpty() ) {
- return false;
- }
- wfProfileIn( __METHOD__ );
-
- // This is similar to LinkHolderArray::replaceInternal
- $dbr = wfGetDB( DB_SLAVE );
- $table = 'page';
- $fields = array( 'page_id', 'page_namespace', 'page_title', 'page_len',
- 'page_is_redirect', 'page_latest' );
- $conds = $this->constructSet( 'page', $dbr );
-
- // Do query
- $caller = __METHOD__;
- if ( strval( $this->caller ) !== '' ) {
- $caller .= " (for {$this->caller})";
- }
- $res = $dbr->select( $table, $fields, $conds, $caller );
- wfProfileOut( __METHOD__ );
- return $res;
- }
-
- /**
- * Construct a WHERE clause which will match all the given titles.
- *
- * @param $prefix String: the appropriate table's field name prefix ('page', 'pl', etc)
- * @param $db DatabaseBase object to use
- * @return mixed string with SQL where clause fragment, or false if no items.
- */
- public function constructSet( $prefix, $db ) {
- return $db->makeWhereFrom2d( $this->data, "{$prefix}_namespace", "{$prefix}_title" );
- }
-}
scripts.mit.edu / autoinstallsdev / mediawiki.git / blobdiff