87 lines
2.3 KiB
PHP
87 lines
2.3 KiB
PHP
<?php
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/**
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* Global functions related to images
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*
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* @file
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*/
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/**
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* Determine if an image exists on the 'bad image list'.
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*
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* The format of MediaWiki:Bad_image_list is as follows:
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* * Only list items (lines starting with "*") are considered
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* * The first link on a line must be a link to a bad image
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* * Any subsequent links on the same line are considered to be exceptions,
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* i.e. articles where the image may occur inline.
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*
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* @param $name string the image name to check
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* @param $contextTitle Title|bool the page on which the image occurs, if known
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* @param $blacklist string wikitext of a file blacklist
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* @return bool
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*/
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function wfIsBadImage( $name, $contextTitle = false, $blacklist = null ) {
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static $badImageCache = null; // based on bad_image_list msg
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wfProfileIn( __METHOD__ );
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# Handle redirects
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$redirectTitle = RepoGroup::singleton()->checkRedirect( Title::makeTitle( NS_FILE, $name ) );
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if( $redirectTitle ) {
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$name = $redirectTitle->getDbKey();
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}
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# Run the extension hook
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$bad = false;
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if( !wfRunHooks( 'BadImage', array( $name, &$bad ) ) ) {
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wfProfileOut( __METHOD__ );
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return $bad;
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}
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$cacheable = ( $blacklist === null );
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if( $cacheable && $badImageCache !== null ) {
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$badImages = $badImageCache;
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} else { // cache miss
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if ( $blacklist === null ) {
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$blacklist = wfMsgForContentNoTrans( 'bad_image_list' ); // site list
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}
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# Build the list now
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$badImages = array();
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$lines = explode( "\n", $blacklist );
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foreach( $lines as $line ) {
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# List items only
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if ( substr( $line, 0, 1 ) !== '*' ) {
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continue;
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}
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# Find all links
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$m = array();
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if ( !preg_match_all( '/\[\[:?(.*?)\]\]/', $line, $m ) ) {
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continue;
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}
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$exceptions = array();
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$imageDBkey = false;
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foreach ( $m[1] as $i => $titleText ) {
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$title = Title::newFromText( $titleText );
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if ( !is_null( $title ) ) {
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if ( $i == 0 ) {
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$imageDBkey = $title->getDBkey();
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} else {
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$exceptions[$title->getPrefixedDBkey()] = true;
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}
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}
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}
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if ( $imageDBkey !== false ) {
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$badImages[$imageDBkey] = $exceptions;
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}
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}
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if ( $cacheable ) {
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$badImageCache = $badImages;
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}
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}
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$contextKey = $contextTitle ? $contextTitle->getPrefixedDBkey() : false;
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$bad = isset( $badImages[$name] ) && !isset( $badImages[$name][$contextKey] );
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wfProfileOut( __METHOD__ );
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return $bad;
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}
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