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<?php
/**
* Fake parser that output the difference of two different parsers
*
* @file
*/
/**
* @ingroup Parser
*/
class Parser_DiffTest
{
var $parsers, $conf;
var $shortOutput = false;
var $dtUniqPrefix;
function __construct( $conf ) {
if ( !isset( $conf['parsers'] ) ) {
throw new MWException( __METHOD__ . ': no parsers specified' );
}
$this->conf = $conf;
}
function init() {
if ( !is_null( $this->parsers ) ) {
return;
}
global $wgHooks;
static $doneHook = false;
if ( !$doneHook ) {
$doneHook = true;
$wgHooks['ParserClearState'][] = array( $this, 'onClearState' );
}
if ( isset( $this->conf['shortOutput'] ) ) {
$this->shortOutput = $this->conf['shortOutput'];
}
foreach ( $this->conf['parsers'] as $i => $parserConf ) {
if ( !is_array( $parserConf ) ) {
$class = $parserConf;
$parserConf = array( 'class' => $parserConf );
} else {
$class = $parserConf['class'];
}
$this->parsers[$i] = new $class( $parserConf );
}
}
function __call( $name, $args ) {
$this->init();
$results = array();
$mismatch = false;
$lastResult = null;
$first = true;
foreach ( $this->parsers as $i => $parser ) {
$currentResult = call_user_func_array( array( &$this->parsers[$i], $name ), $args );
if ( $first ) {
$first = false;
} else {
if ( is_object( $lastResult ) ) {
if ( $lastResult != $currentResult ) {
$mismatch = true;
}
} else {
if ( $lastResult !== $currentResult ) {
$mismatch = true;
}
}
}
$results[$i] = $currentResult;
$lastResult = $currentResult;
}
if ( $mismatch ) {
if ( count( $results ) == 2 ) {
$resultsList = array();
foreach ( $this->parsers as $i => $parser ) {
$resultsList[] = var_export( $results[$i], true );
}
$diff = wfDiff( $resultsList[0], $resultsList[1] );
} else {
$diff = '[too many parsers]';
}
$msg = "Parser_DiffTest: results mismatch on call to $name\n";
if ( !$this->shortOutput ) {
$msg .= 'Arguments: ' . $this->formatArray( $args ) . "\n";
}
$msg .= 'Results: ' . $this->formatArray( $results ) . "\n" .
"Diff: $diff\n";
throw new MWException( $msg );
}
return $lastResult;
}
function formatArray( $array ) {
if ( $this->shortOutput ) {
foreach ( $array as $key => $value ) {
if ( $value instanceof ParserOutput ) {
$array[$key] = "ParserOutput: {$value->getText()}";
}
}
}
return var_export( $array, true );
}
function setFunctionHook( $id, $callback, $flags = 0 ) {
$this->init();
foreach ( $this->parsers as $parser ) {
$parser->setFunctionHook( $id, $callback, $flags );
}
}
/**
* @param $parser Parser
* @return bool
*/
function onClearState( &$parser ) {
// hack marker prefixes to get identical output
if ( !isset( $this->dtUniqPrefix ) ) {
$this->dtUniqPrefix = $parser->uniqPrefix();
} else {
$parser->mUniqPrefix = $this->dtUniqPrefix;
}
return true;
}
}
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