mirror of
https://gerrit.wikimedia.org/r/mediawiki/extensions/ParserFunctions
synced 2024-11-15 20:09:43 +00:00
482 lines
15 KiB
PHP
482 lines
15 KiB
PHP
<?php
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if ( !defined( 'MEDIAWIKI' ) ) {
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die( 'This file is a MediaWiki extension, it is not a valid entry point' );
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}
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$wgExtensionFunctions[] = 'wfSetupParserFunctions';
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$wgExtensionCredits['parserhook'][] = array(
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'name' => 'ParserFunctions',
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'url' => 'http://meta.wikimedia.org/wiki/ParserFunctions',
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'author' => 'Tim Starling',
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'description' => 'Enhance parser with logical functions',
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);
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$wgHooks['LanguageGetMagic'][] = 'wfParserFunctionsLanguageGetMagic';
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$wgHooks['ParserLimitReport'][] = 'wfParserFunctionsLimitReport';
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$wgMaxIfExistCount = 100;
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class ExtParserFunctions {
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var $mExprParser;
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var $mTimeCache = array();
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var $mTimeChars = 0;
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var $mMaxTimeChars = 6000; # ~10 seconds
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function clearState(&$parser) {
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$this->mTimeChars = 0;
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$parser->pf_ifexist_count = 0;
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$parser->pf_ifexist_breakdown = array();
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return true;
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}
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function &getExprParser() {
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if ( !isset( $this->mExpr ) ) {
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if ( !class_exists( 'ExprParser' ) ) {
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require( dirname( __FILE__ ) . '/Expr.php' );
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}
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$this->mExprParser = new ExprParser;
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}
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return $this->mExprParser;
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}
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function expr( &$parser, $expr = '' ) {
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try {
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return $this->getExprParser()->doExpression( $expr );
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} catch(ExprError $e) {
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return $e->getMessage();
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}
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}
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function ifexpr( &$parser, $expr = '', $then = '', $else = '' ) {
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try{
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if($this->getExprParser()->doExpression( $expr )) {
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return $then;
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} else {
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return $else;
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}
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} catch (ExprError $e){
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return $e->getMessage();
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}
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}
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function ifexprObj( $parser, $frame, $args ) {
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$expr = isset( $args[0] ) ? trim( $frame->expand( $args[0] ) ) : '';
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$then = isset( $args[1] ) ? $args[1] : '';
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$else = isset( $args[2] ) ? $args[2] : '';
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$result = $this->ifexpr( $parser, $expr, $then, $else );
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if ( is_object( $result ) ) {
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$result = trim( $frame->expand( $result ) );
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}
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return $result;
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}
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function ifHook( &$parser, $test = '', $then = '', $else = '' ) {
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if ( $test !== '' ) {
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return $then;
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} else {
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return $else;
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}
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}
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function ifObj( &$parser, $frame, $args ) {
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$test = isset( $args[0] ) ? trim( $frame->expand( $args[0] ) ) : '';
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if ( $test !== '' ) {
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return isset( $args[1] ) ? trim( $frame->expand( $args[1] ) ) : '';
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} else {
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return isset( $args[2] ) ? trim( $frame->expand( $args[2] ) ) : '';
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}
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}
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function ifeq( &$parser, $left = '', $right = '', $then = '', $else = '' ) {
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if ( $left == $right ) {
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return $then;
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} else {
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return $else;
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}
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}
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function ifeqObj( &$parser, $frame, $args ) {
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$left = isset( $args[0] ) ? trim( $frame->expand( $args[0] ) ) : '';
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$right = isset( $args[1] ) ? trim( $frame->expand( $args[1] ) ) : '';
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if ( $left == $right ) {
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return isset( $args[2] ) ? trim( $frame->expand( $args[2] ) ) : '';
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} else {
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return isset( $args[3] ) ? trim( $frame->expand( $args[3] ) ) : '';
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}
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}
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function switchHook( &$parser /*,...*/ ) {
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$args = func_get_args();
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array_shift( $args );
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$primary = trim(array_shift($args));
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$found = false;
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$parts = null;
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$default = null;
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$mwDefault =& MagicWord::get( 'default' );
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foreach( $args as $arg ) {
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$parts = array_map( 'trim', explode( '=', $arg, 2 ) );
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if ( count( $parts ) == 2 ) {
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# Found "="
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if ( $found || $parts[0] == $primary ) {
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# Found a match, return now
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return $parts[1];
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} else {
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if ( $mwDefault->matchStartAndRemove( $parts[0] ) ) {
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$default = $parts[1];
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} # else wrong case, continue
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}
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} elseif ( count( $parts ) == 1 ) {
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# Multiple input, single output
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# If the value matches, set a flag and continue
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if ( $parts[0] == $primary ) {
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$found = true;
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}
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} # else RAM corruption due to cosmic ray?
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}
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# Default case
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# Check if the last item had no = sign, thus specifying the default case
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if ( count( $parts ) == 1) {
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return $parts[0];
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} elseif ( !is_null( $default ) ) {
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return $default;
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} else {
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return '';
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}
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}
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function switchObj( $parser, $frame, $args ) {
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if ( count( $args ) == 0 ) {
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return '';
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}
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$primary = trim( $frame->expand( array_shift( $args ) ) );
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$found = false;
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$default = null;
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$lastItemHadNoEquals = false;
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$mwDefault =& MagicWord::get( 'default' );
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foreach ( $args as $arg ) {
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list( $nameNode, $index, $valueNode ) = $frame->splitBraceNode( $arg );
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if ( $index === '' ) {
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# Found "="
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$lastItemHadNoEquals = false;
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$test = trim( $frame->expand( $nameNode ) );
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if ( $found ) {
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# Multiple input match
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return trim( $frame->expand( $valueNode ) );
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} else {
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$test = trim( $frame->expand( $nameNode ) );
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if ( $test == $primary ) {
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# Found a match, return now
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return trim( $frame->expand( $valueNode ) );
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} else {
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if ( $mwDefault->matchStartAndRemove( $test ) ) {
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$default = $valueNode;
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} # else wrong case, continue
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}
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}
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} else {
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# Multiple input, single output
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# If the value matches, set a flag and continue
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$lastItemHadNoEquals = true;
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$test = trim( $frame->expand( $valueNode ) );
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if ( $test == $primary ) {
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$found = true;
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}
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}
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}
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# Default case
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# Check if the last item had no = sign, thus specifying the default case
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if ( $lastItemHadNoEquals ) {
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return $test;
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} elseif ( !is_null( $default ) ) {
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return trim( $frame->expand( $default ) );
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} else {
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return '';
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}
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}
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/**
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* Returns the absolute path to a subpage, relative to the current article
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* title. Treats titles as slash-separated paths.
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*
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* Following subpage link syntax instead of standard path syntax, an
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* initial slash is treated as a relative path, and vice versa.
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*/
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public function rel2abs( &$parser , $to = '' , $from = '' ) {
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$from = trim($from);
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if( $from == '' ) {
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$from = $parser->getTitle()->getPrefixedText();
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}
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$to = rtrim( $to , ' /' );
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// if we have an empty path, or just one containing a dot
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if( $to == '' || $to == '.' ) {
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return $from;
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}
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// if the path isn't relative
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if ( substr( $to , 0 , 1) != '/' &&
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substr( $to , 0 , 2) != './' &&
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substr( $to , 0 , 3) != '../' &&
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$to != '..' )
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{
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$from = '';
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}
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// Make a long path, containing both, enclose it in /.../
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$fullPath = '/' . $from . '/' . $to . '/';
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// remove redundant current path dots
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$fullPath = preg_replace( '!/(\./)+!', '/', $fullPath );
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// remove double slashes
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$fullPath = preg_replace( '!/{2,}!', '/', $fullPath );
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// remove the enclosing slashes now
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$fullPath = trim( $fullPath , '/' );
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$exploded = explode ( '/' , $fullPath );
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$newExploded = array();
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foreach ( $exploded as $current ) {
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if( $current == '..' ) { // removing one level
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if( !count( $newExploded ) ){
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// attempted to access a node above root node
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return '<strong class="error">' . wfMsgForContent( 'pfunc_rel2abs_invalid_depth', $fullPath ) . '</strong>';
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}
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// remove last level from the stack
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array_pop( $newExploded );
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} else {
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// add the current level to the stack
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$newExploded[] = $current;
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}
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}
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// we can now join it again
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return implode( '/' , $newExploded );
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}
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function incrementIfexistCount( $parser, $frame ) {
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// Don't let this be called more than a certain number of times. It tends to make the database explode.
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global $wgMaxIfExistCount;
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$parser->pf_ifexist_count++;
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if ( $frame ) {
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$pdbk = $frame->getPDBK( 1 );
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if ( !isset( $parser->pf_ifexist_breakdown[$pdbk] ) ) {
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$parser->pf_ifexist_breakdown[$pdbk] = 0;
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}
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$parser->pf_ifexist_breakdown[$pdbk] ++;
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}
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return $parser->pf_ifexist_count <= $wgMaxIfExistCount;
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}
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function ifexist( &$parser, $title = '', $then = '', $else = '' ) {
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return $this->ifexistCommon( $parser, false, $title, $then, $else );
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}
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function ifexistCommon( &$parser, $frame, $title = '', $then = '', $else = '' ) {
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$title = Title::newFromText( $title );
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if ( $title ) {
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/* If namespace is specified as NS_MEDIA, then we want to check the physical file,
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* not the "description" page.
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*/
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if( $title->getNamespace() == NS_MEDIA ) {
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if ( !$this->incrementIfexistCount( $parser, $frame ) ) {
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return $else;
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}
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$file = wfFindFile($title);
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if ( !$file ) {
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return $else;
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}
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$parser->mOutput->addImage($file->getName());
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return $file->exists() ? $then : $else;
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} else {
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$pdbk = $title->getPrefixedDBkey();
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$lc = LinkCache::singleton();
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if ( $lc->getGoodLinkID( $pdbk ) ) {
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return $then;
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} elseif ( $lc->isBadLink( $pdbk ) ) {
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return $else;
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}
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if ( !$this->incrementIfexistCount( $parser, $frame ) ) {
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return $else;
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}
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$id = $title->getArticleID();
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$parser->mOutput->addLink( $title, $id );
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if ( $id ) {
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return $then;
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}
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}
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}
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return $else;
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}
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function ifexistObj( &$parser, $frame, $args ) {
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$title = isset( $args[0] ) ? trim( $frame->expand( $args[0] ) ) : '';
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$then = isset( $args[1] ) ? $args[1] : null;
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$else = isset( $args[2] ) ? $args[2] : null;
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$result = $this->ifexistCommon( $parser, $frame, $title, $then, $else );
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if ( $result === null ) {
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return '';
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} else {
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return trim( $frame->expand( $result ) );
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}
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}
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function time( &$parser, $format = '', $date = '', $local = false ) {
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global $wgContLang, $wgLocaltimezone;
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if ( isset( $this->mTimeCache[$format][$date][$local] ) ) {
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return $this->mTimeCache[$format][$date][$local];
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}
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if ( $date !== '' ) {
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$unix = @strtotime( $date );
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} else {
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$unix = time();
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}
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if ( $unix == -1 || $unix == false ) {
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$result = '<strong class="error">' . wfMsgForContent( 'pfunc_time_error' ) . '</strong>';
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} else {
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$this->mTimeChars += strlen( $format );
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if ( $this->mTimeChars > $this->mMaxTimeChars ) {
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return '<strong class="error">' . wfMsgForContent( 'pfunc_time_too_long' ) . '</strong>';
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} else {
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if ( $local ) {
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# Use the time zone
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if ( isset( $wgLocaltimezone ) ) {
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$oldtz = getenv( 'TZ' );
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putenv( 'TZ='.$wgLocaltimezone );
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}
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wfSuppressWarnings(); // E_STRICT system time bitching
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$ts = date( 'YmdHis', $unix );
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wfRestoreWarnings();
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if ( isset( $wgLocaltimezone ) ) {
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putenv( 'TZ='.$oldtz );
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}
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} else {
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$ts = wfTimestamp( TS_MW, $unix );
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}
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if ( method_exists( $wgContLang, 'sprintfDate' ) ) {
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$result = $wgContLang->sprintfDate( $format, $ts );
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} else {
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if ( !class_exists( 'SprintfDateCompat' ) ) {
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require( dirname( __FILE__ ) . '/SprintfDateCompat.php' );
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}
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$result = SprintfDateCompat::sprintfDate( $format, $ts );
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}
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}
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}
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$this->mTimeCache[$format][$date][$local] = $result;
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return $result;
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}
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function localTime( &$parser, $format = '', $date = '' ) {
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return $this->time( $parser, $format, $date, true );
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}
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/**
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* Obtain a specified number of slash-separated parts of a title,
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* e.g. {{#titleparts:Hello/World|1}} => "Hello"
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*
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* @param Parser $parser Parent parser
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* @param string $title Title to split
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* @param int $parts Number of parts to keep
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* @param int $offset Offset starting at 1
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* @return string
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*/
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public function titleparts( $parser, $title = '', $parts = -1, $offset = 1 ) {
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$parts = intval( $parts );
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$offset = intval( $offset ) - 1;
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$ntitle = Title::newFromText( $title );
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if( $ntitle instanceof Title ) {
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$bits = explode( '/', $ntitle->getPrefixedText() );
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if( $parts <= 0 || $parts > count( $bits ) ) {
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return $ntitle->getPrefixedText();
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} elseif( $offset < 0 || $offset > count( $bits ) ) {
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return $ntitle->getPrefixedText();
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} else {
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$keep = array();
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for( $i = 0; $i < $offset; $i++ )
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array_shift( $bits );
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for( $i = 0; $i < $parts; $i++ )
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$keep[] = array_shift( $bits );
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return implode( '/', $keep );
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}
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} else {
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return $title;
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}
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}
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function afterTidy( &$parser, &$text ) {
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global $wgMaxIfexistCount;
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if ( $parser->pf_ifexist_count > $wgMaxIfexistCount ) {
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if ( is_callable( array( $parser->mOutput, 'addWarning' ) ) ) {
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$warning = wfMsg( 'pfunc_ifexist_warning', $parser->pf_ifexist_count, $wgMaxIfexistCount );
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$parser->mOutput->addWarning( $warning );
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$cat = Title::makeTitleSafe( NS_CATEGORY, wfMsg( 'pfunc_max_ifexist_category' ) );
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if ( $cat ) {
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$parser->mOutput->addCategory( $cat->getDBkey(), $parser->getDefaultSort() );
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}
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}
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}
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return true;
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}
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}
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function wfSetupParserFunctions() {
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global $wgParser, $wgMessageCache, $wgExtParserFunctions, $wgMessageCache, $wgHooks;
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$wgExtParserFunctions = new ExtParserFunctions;
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// Check for SFH_OBJECT_ARGS capability
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if ( class_exists( 'StubObject' ) && !StubObject::isRealObject( $wgParser ) ) {
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$wgParser->_unstub();
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}
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if ( defined( get_class( $wgParser ) . '::SFH_OBJECT_ARGS' ) ) {
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// These functions accept DOM-style arguments
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$wgParser->setFunctionHook( 'if', array( &$wgExtParserFunctions, 'ifObj' ), SFH_OBJECT_ARGS );
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$wgParser->setFunctionHook( 'ifeq', array( &$wgExtParserFunctions, 'ifeqObj' ), SFH_OBJECT_ARGS );
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$wgParser->setFunctionHook( 'switch', array( &$wgExtParserFunctions, 'switchObj' ), SFH_OBJECT_ARGS );
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$wgParser->setFunctionHook( 'ifexist', array( &$wgExtParserFunctions, 'ifexistObj' ), SFH_OBJECT_ARGS );
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$wgParser->setFunctionHook( 'ifexpr', array( &$wgExtParserFunctions, 'ifexprObj' ), SFH_OBJECT_ARGS );
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} else {
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$wgParser->setFunctionHook( 'if', array( &$wgExtParserFunctions, 'ifHook' ) );
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$wgParser->setFunctionHook( 'ifeq', array( &$wgExtParserFunctions, 'ifeq' ) );
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$wgParser->setFunctionHook( 'switch', array( &$wgExtParserFunctions, 'switchHook' ) );
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$wgParser->setFunctionHook( 'ifexist', array( &$wgExtParserFunctions, 'ifexist' ) );
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$wgParser->setFunctionHook( 'ifexpr', array( &$wgExtParserFunctions, 'ifexpr' ) );
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}
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$wgParser->setFunctionHook( 'expr', array( &$wgExtParserFunctions, 'expr' ) );
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$wgParser->setFunctionHook( 'time', array( &$wgExtParserFunctions, 'time' ) );
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$wgParser->setFunctionHook( 'timel', array( &$wgExtParserFunctions, 'localTime' ) );
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$wgParser->setFunctionHook( 'rel2abs', array( &$wgExtParserFunctions, 'rel2abs' ) );
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$wgParser->setFunctionHook( 'titleparts', array( &$wgExtParserFunctions, 'titleparts' ) );
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require_once( dirname( __FILE__ ) . '/ParserFunctions.i18n.php' );
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foreach( efParserFunctionsMessages() as $lang => $messages )
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$wgMessageCache->addMessages( $messages, $lang );
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$wgHooks['ParserClearState'][] = array( &$wgExtParserFunctions, 'clearState' );
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$wgHooks['ParserAfterTidy'][] = array( &$wgExtParserFunctions, 'afterTidy' );
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}
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function wfParserFunctionsLanguageGetMagic( &$magicWords, $langCode ) {
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require_once( dirname( __FILE__ ) . '/ParserFunctions.i18n.php' );
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foreach( efParserFunctionsWords( $langCode ) as $word => $trans )
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$magicWords[$word] = $trans;
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return true;
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}
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function wfParserFunctionsLimitReport( $parser, &$report ) {
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global $wgMaxIfExistCount;
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if ( isset( $parser->pf_ifexist_count ) ) {
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$report .= "#ifexist count: {$parser->pf_ifexist_count}/$wgMaxIfExistCount\n";
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}
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return true;
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}
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