converter.php

<?php
namespace Bitrix\Main\Text;
 
abstract class Converter
{
    const TEXT = "text";
    const HTML = "html";
 
    private static $htmlConverter;
    private static $xmlConverter;
    private static $emptyConverter;
 
    public static function getHtmlConverter()
    {
        if (self::$htmlConverter == null)
            self::$htmlConverter = new HtmlConverter();
        return self::$htmlConverter;
    }
 
    public static function getXmlConverter()
    {
        if (self::$xmlConverter == null)
            self::$xmlConverter = new XmlConverter();
        return self::$xmlConverter;
    }
 
    public static function getEmptyConverter()
    {
        if (self::$emptyConverter == null)
            self::$emptyConverter = new EmptyConverter();
        return self::$emptyConverter;
    }
 
    public static function initTextType($textType)
    {
        $textType = mb_strtolower($textType);
        if ($textType != self::TEXT && $textType != self::HTML)
            $textType = self::TEXT;
        return $textType;
    }
 
    abstract public function encode($text, $textType = "");
    abstract public function decode($text, $textType = "");
}