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<?php
/**
* @file
* @license GPL-2.0-or-later
*/
namespace MediaWiki\Extension\Translate\Utilities;
/**
* Implements partial support for SmartFormat plural syntax parsing.
* @see https://github.com/axuno/SmartFormat/wiki/Pluralization
* @since 2019.11
*/
class SmartFormatPlural {
/**
* Example input:
* {0} {0:message|messages} older than {1} {1:week|weeks} {0:has|have} been deleted.
* Example output:
* [
* '0' => [
* [
* 'forms' => [ 'message', 'messages' ],
* 'original' => '{0:message|messages}',
* ],
* [
* 'forms' => [ 'has', 'have' ],
* 'original' => '{0:has|have}',
* ],
* ],
* '1' => [
* [
* 'forms' => [ 'week', 'weeks' ],
* 'original' => '{1:week|weeks}',
* ],
* ],
* ]
*
* @param string $text
* @return array
*/
public static function getPluralInstances( string $text ): array {
// ldns = Large Deeply-Nested Structure
$ldns = [];
// Named variables seem to be supported by the spec, but we limit ourselves
// only to numbers. Example syntax {0:message|messages}
$regex = '/\{(\d+):([^}]+)\}/Us';
$matches = [];
preg_match_all( $regex, $text, $matches, PREG_SET_ORDER );
foreach ( $matches as $instance ) {
$original = $instance[ 0 ];
$variable = $instance[ 1 ];
$forms = explode( '|', $instance[ 2 ] );
$ldns[ $variable ] = $ldns[ $variable ] ?? [];
$ldns[ $variable ][] = [
'forms' => $forms,
'original' => $original,
];
}
return $ldns;
}
}
class_alias( SmartFormatPlural::class, '\MediaWiki\Extensions\Translate\SmartFormatPlural' );
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