vendor/ezyang/htmlpurifier/library/HTMLPurifier/ConfigSchema/InterchangeBuilder.php

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<?php

class HTMLPurifier_ConfigSchema_InterchangeBuilder
{

    /**
     * Used for processing DEFAULT, nothing else.
     * @type HTMLPurifier_VarParser
     */
    protected $varParser;

    /**
     * @param HTMLPurifier_VarParser $varParser
     */
    public function __construct($varParser = null)
    {
        $this->varParser = $varParser ? $varParser : new HTMLPurifier_VarParser_Native();
    }

    /**
     * @param string $dir
     * @return HTMLPurifier_ConfigSchema_Interchange
     */
    public static function buildFromDirectory($dir = null)
    {
        $builder = new HTMLPurifier_ConfigSchema_InterchangeBuilder();
        $interchange = new HTMLPurifier_ConfigSchema_Interchange();
        return $builder->buildDir($interchange, $dir);
    }

    /**
     * @param HTMLPurifier_ConfigSchema_Interchange $interchange
     * @param string $dir
     * @return HTMLPurifier_ConfigSchema_Interchange
     */
    public function buildDir($interchange, $dir = null)
    {
        if (!$dir) {
            $dir = HTMLPURIFIER_PREFIX . '/HTMLPurifier/ConfigSchema/schema';
        }
        if (file_exists($dir . '/info.ini')) {
            $info = parse_ini_file($dir . '/info.ini');
            $interchange->name = $info['name'];
        }

        $files = array();
        $dh = opendir($dir);
        while (false !== ($file = readdir($dh))) {
            if (!$file || $file[0] == '.' || strrchr($file, '.') !== '.txt') {
                continue;
            }
            $files[] = $file;
        }
        closedir($dh);

        sort($files);
        foreach ($files as $file) {
            $this->buildFile($interchange, $dir . '/' . $file);
        }
        return $interchange;