Extension talk:LO Parser Functions
Add topicLatest comment: 16 years ago by Sledged in topic Wrong Expr.php
Missing i18n File
[edit]I've had some real troubles with this extension. After a bit of hackery, I finally got it to work. Here are my files. Note that the instructions make no mention of the i18n file, so I had to develop a new one based on the ControlStructureFunctions i18n file:
- LOParserFunctions.php
<?php
if ( !defined( 'MEDIAWIKI' ) ) {
die( 'This file is a MediaWiki extension, it is not a valid entry point' );
}
$wgExtensionFunctions[] = 'wfSetupLOParserFunctions';
$wgExtensionCredits['parserhook'][] = array(
'name' => 'Left-Over Parser Functions',
'url' => 'http://www.mediawiki.org/wiki/Extension:LO_Parser_Functions',
'author' => 'Tim Starling',
'description' => 'Enhance parser with logical functions',
);
$wgHooks['LanguageGetMagic'][] = 'wfLOParserFunctionsLanguageGetMagic';
class ExtLOParserFunctions {
var $mExprParser;
var $mTimeCache = array();
var $mTimeChars = 0;
var $mMaxTimeChars = 6000; # ~10 seconds
function clearState() {
$this->mTimeChars = 0;
return true;
}
function &getExprParser() {
if ( !isset( $this->mExprParser ) ) {
if ( !class_exists( 'ExprParser' ) ) {
require( dirname( __FILE__ ) . '/Expr.php' );
ExprParser::addMessages();
}
$this->mExprParser = new ExprParser;
}
return $this->mExprParser;
}
function expr( &$parser, $expr = '' ) {
try {
return $this->getExprParser()->doExpression( $expr );
} catch(ExprError $e) {
return $e->getMessage();
}
}
/**
* Returns the absolute path to a subpage, relative to the current article
* title. Treats titles as slash-separated paths.
*
* Following subpage link syntax instead of standard path syntax, an
* initial slash is treated as a relative path, and vice versa.
*/
public function rel2abs( &$parser , $to = '' , $from = '' ) {
$from = trim($from);
if( $from == '' ) {
$from = $parser->getTitle()->getPrefixedText();
}
$to = rtrim( $to , ' /' );
// if we have an empty path, or just one containing a dot
if( $to == '' || $to == '.' ) {
return $from;
}
// if the path isn't relative
if ( substr( $to , 0 , 1) != '/' &&
substr( $to , 0 , 2) != './' &&
substr( $to , 0 , 3) != '../' &&
$to != '..' )
{
$from = '';
}
// Make a long path, containing both, enclose it in /.../
$fullPath = '/' . $from . '/' . $to . '/';
// remove redundant current path dots
$fullPath = preg_replace( '!/(\./)+!', '/', $fullPath );
// remove double slashes
$fullPath = preg_replace( '!/{2,}!', '/', $fullPath );
// remove the enclosing slashes now
$fullPath = trim( $fullPath , '/' );
$exploded = explode ( '/' , $fullPath );
$newExploded = array();
foreach ( $exploded as $current ) {
if( $current == '..' ) { // removing one level
if( !count( $newExploded ) ){
// attempted to access a node above root node
return wfMsgForContent( 'pfunc_rel2abs_invalid_depth', $fullPath );
}
// remove last level from the stack
array_pop( $newExploded );
} else {
// add the current level to the stack
$newExploded[] = $current;
}
}
// we can now join it again
return implode( '/' , $newExploded );
}
function time( &$parser, $format = '', $date = '', $local = false ) {
global $wgContLang, $wgLocaltimezone;
if ( isset( $this->mTimeCache[$format][$date][$local] ) ) {
return $this->mTimeCache[$format][$date][$local];
}
if ( $date !== '' ) {
$unix = @strtotime( $date );
} else {
$unix = time();
}
if ( $unix == -1 || $unix == false ) {
$result = wfMsgForContent( 'pfunc_time_error' );
} else {
$this->mTimeChars += strlen( $format );
if ( $this->mTimeChars > $this->mMaxTimeChars ) {
return wfMsgForContent( 'pfunc_time_too_long' );
} else {
if ( $local ) {
# Use the time zone
if ( isset( $wgLocaltimezone ) ) {
$oldtz = getenv( 'TZ' );
putenv( 'TZ='.$wgLocaltimezone );
}
wfSuppressWarnings(); // E_STRICT system time bitching
$ts = date( 'YmdHis', $unix );
wfRestoreWarnings();
if ( isset( $wgLocaltimezone ) ) {
putenv( 'TZ='.$oldtz );
}
} else {
$ts = wfTimestamp( TS_MW, $unix );
}
if ( method_exists( $wgContLang, 'sprintfDate' ) ) {
$result = $wgContLang->sprintfDate( $format, $ts );
} else {
if ( !class_exists( 'SprintfDateCompat' ) ) {
require( dirname( __FILE__ ) . '/SprintfDateCompat.php' );
}
$result = SprintfDateCompat::sprintfDate( $format, $ts );
}
}
}
$this->mTimeCache[$format][$date][$local] = $result;
return $result;
}
function localTime( &$parser, $format = '', $date = '' ) {
return $this->time( $parser, $format, $date, true );
}
/**
* Obtain a specified number of slash-separated parts of a title,
* e.g. {{#titleparts:Hello/World|1}} => "Hello"
*
* @param Parser $parser Parent parser
* @param string $title Title to split
* @param int $parts Number of parts to keep
* @param int $offset Offset starting at 1
* @return string
*/
public function titleparts( $parser, $title = '', $parts = -1, $offset = 1 ) {
$parts = intval( $parts );
$offset = intval( $offset ) - 1;
$ntitle = Title::newFromText( $title );
if( $ntitle instanceof Title ) {
$bits = explode( '/', $ntitle->getPrefixedText() );
if( $parts <= 0 || $parts > count( $bits ) ) {
return $ntitle->getPrefixedText();
} elseif( $offset < 0 || $offset > count( $bits ) ) {
return $ntitle->getPrefixedText();
} else {
$keep = array();
for( $i = 0; $i < $offset; $i++ )
array_shift( $bits );
for( $i = 0; $i < $parts; $i++ )
$keep[] = array_shift( $bits );
return implode( '/', $keep );
}
} else {
return $title;
}
}
}
function wfSetupLOParserFunctions() {
global $wgParser, $wgMessageCache, $wgExtLOParserFunctions, $wgMessageCache, $wgHooks;
$wgExtLOParserFunctions = new ExtLOParserFunctions;
$wgParser->setFunctionHook( 'expr', array( &$wgExtLOParserFunctions, 'expr' ) );
$wgParser->setFunctionHook( 'time', array( &$wgExtLOParserFunctions, 'time' ) );
$wgParser->setFunctionHook( 'timel', array( &$wgExtLOParserFunctions, 'localTime' ) );
$wgParser->setFunctionHook( 'rel2abs', array( &$wgExtLOParserFunctions, 'rel2abs' ) );
$wgParser->setFunctionHook( 'titleparts', array( &$wgExtLOParserFunctions, 'titleparts' ) );
include_once( dirname( __FILE__ ) . '/LOParserFunctions.i18n.php' );
foreach( LOParserFunctions_i18n::efLOParserFunctionsMessages() as $lang => $messages )
$wgMessageCache->addMessages( $messages, $lang );
$wgHooks['ParserClearState'][] = array( &$wgExtLOParserFunctions, 'clearState' );
}
function wfLOParserFunctionsLanguageGetMagic( &$magicWords, $langCode ) {
include_once( dirname( __FILE__ ) . '/LOParserFunctions.i18n.php' );
foreach( LOParserFunctions_i18n::efLOParserFunctionsWords( $langCode ) as $word => $trans )
$magicWords[$word] = $trans;
return true;
}
- LOParserFunctions.i18n.php
<?php
class LOParserFunctions_i18n
{
private static $words = array(
// English
'en' => array(
'expr' => array( 0, 'expr' ),
'time' => array( 0, 'time' ),
'timel' => array( 0, 'timel' ),
'rel2abs' => array( 0, 'rel2abs' ),
'titleparts' => array( 0, 'titleparts' ),
),
);
public static $messages = array(
// English
'en' => array(
'pfunc_rel2abs_invalid_depth' =>
"Invalid depth on rel2abs",
'pfunc_time_error' =>
"Time Error",
'pfunc_time_too_long' =>
"Time too long",
)
);
/**
* Get translated magic words, if available
*
* @param string $lang Language code
* @return array
*/
public static function efLOParserFunctionsWords( $lang )
{
// English is used as a fallback, and the English synonyms are
// used if a translation has not been provided for a given word
return ( $lang == 'en' || !isset( self::$words[$lang] ) ) ?
self::$words['en'] :
array_merge( self::$words['en'], self::$words[$lang] );
}
public static function efLOParserFunctionsMessages()
{
return self::$messages;
}
}
Listrophy 18:21, 15 November 2007 (UTC)
- Wow! How did I forget to include that? I've included the i18n file that I was using during development. It's little more than a copy/paste of the ParserFunctions' i18n file. —Sledged (talk) 19:00, 15 November 2007 (UTC)
Wrong Expr.php
[edit]The Expr.php linked in the page is wrong! It doesn't contain a definition for the function "addMessage", that is requested by LO Parser Functions, as you can see:
function &getExprParser() {
if ( !isset( $this->mExprParser ) ) {
if ( !class_exists( 'ExprParser' ) ) {
require( dirname( __FILE__ ) . '/Expr.php' );
ExprParser::addMessages();
}
$this->mExprParser = new ExprParser;
}
return $this->mExprParser;
}
The correct file I used is this, so please someone should fix this error! --81.208.83.233 21:13, 6 December 2007 (UTC)
- I changed the link so it points to an older version (r25357). When I get a chance I'll use the current version of ParserFunctions to update this extension, and change the link to the newest version. —Sledged (talk) 21:48, 6 December 2007 (UTC)