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<?php
/**
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
* http://www.gnu.org/copyleft/gpl.html
*
* @file
* @ingroup Language
*/
/**
* Methods for dealing with language codes.
* @todo Move some of the code-related static methods out of Language into this class
*
* @since 1.29
* @ingroup Language
*/
class LanguageCode {
/**
* Mapping of deprecated language codes that were used in previous
* versions of MediaWiki to up-to-date, current language codes.
*
* @var array Mapping from language code to language code
*
* @since 1.30
*/
private static $deprecatedLanguageCodeMapping = [
// Note that als is actually a valid ISO 639 code (Tosk Albanian), but it
// was previously used in MediaWiki for Alsatian, which comes under gsw
'als' => 'gsw',
'bat-smg' => 'sgs',
'be-x-old' => 'be-tarask',
'fiu-vro' => 'vro',
'roa-rup' => 'rup',
'zh-classical' => 'lzh',
'zh-min-nan' => 'nan',
'zh-yue' => 'yue',
];
/**
* Returns a mapping of deprecated language codes that were used in previous
* versions of MediaWiki to up-to-date, current language codes.
*
* This array is merged into $wgDummyLanguageCodes in Setup.php, along with
* the fake language codes 'qqq' and 'qqx', which are used internally by
* MediaWiki's localisation system.
*
* @return string[]
*
* @since 1.29
*/
public static function getDeprecatedCodeMapping() {
return self::$deprecatedLanguageCodeMapping;
}
/**
* Replace deprecated language codes that were used in previous
* versions of MediaWiki to up-to-date, current language codes.
* Other values will returned unchanged.
*
* @param string $code Old language code
* @return string New language code
*
* @since 1.30
*/
public static function replaceDeprecatedCodes( $code ) {
if ( isset( self::$deprecatedLanguageCodeMapping[$code] ) ) {
return self::$deprecatedLanguageCodeMapping[$code];
}
return $code;
}
/**
* Get the normalised IETF language tag
* See unit test for examples.
* See mediawiki.language.bcp47 for the JavaScript implementation.
*
* @param string $code The language code.
* @return string The language code which complying with BCP 47 standards.
*
* @since 1.31
*/
public static function bcp47( $code ) {
$codeSegment = explode( '-', $code );
$codeBCP = [];
foreach ( $codeSegment as $segNo => $seg ) {
// when previous segment is x, it is a private segment and should be lc
if ( $segNo > 0 && strtolower( $codeSegment[( $segNo - 1 )] ) == 'x' ) {
$codeBCP[$segNo] = strtolower( $seg );
// ISO 3166 country code
} elseif ( ( strlen( $seg ) == 2 ) && ( $segNo > 0 ) ) {
$codeBCP[$segNo] = strtoupper( $seg );
// ISO 15924 script code
} elseif ( ( strlen( $seg ) == 4 ) && ( $segNo > 0 ) ) {
$codeBCP[$segNo] = ucfirst( strtolower( $seg ) );
// Use lowercase for other cases
} else {
$codeBCP[$segNo] = strtolower( $seg );
}
}
$langCode = implode( '-', $codeBCP );
return $langCode;
}
}
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