Bidi.php

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<?php
namespace Wikimedia\Leximorph\Handler;
 
use Wikimedia\Leximorph\Provider;
 
class Bidi {
 
    public const string LRE = "\xE2\x80\xAA";
 
    public const string RLE = "\xE2\x80\xAB";
 
    public const string PDF = "\xE2\x80\xAC";
 
    public function __construct(
        private readonly Provider $provider,
    ) {
    }
 
    public function process( string $value ): string {
        $dir = $this->provider->getBidiProvider()->getDirection( $value );
        if ( $dir === 'ltr' ) {
            # Wrap in LEFT-TO-RIGHT EMBEDDING ... POP DIRECTIONAL FORMATTING
            return self::LRE . $value . self::PDF;
        }
        if ( $dir === 'rtl' ) {
            # Wrap in RIGHT-TO-LEFT EMBEDDING ... POP DIRECTIONAL FORMATTING
            return self::RLE . $value . self::PDF;
        }
 
        # No strong directionality: return the text unmodified
        return $value;
    }
}