<?php
/**
 * Created by PhpStorm.
 * User: Cibermag
 * Date: 10.09.2015
 * Time: 17:47
 */

namespace yii\multiparser;


class XmlParser implements ParserInterface{
    public function read()
    {
        // TODO: Implement read() method.
    }

    public function setup()
    {
        // TODO: Implement setup() method.
    }


    /**
     * Converts an XML string to a PHP array
     * See http://phpsecurity.readthedocs.org/en/latest/Injection-Attacks.html#xml-external-entity-injection
     *
     * @uses recursiveXMLToArray()
     * @param string $val
     * @param boolean $disableDoctypes Disables the use of DOCTYPE, and will trigger an error if encountered.
     * false by default.
     * @param boolean $disableExternals Disables the loading of external entities. false by default.
     * @return array
     */
    public static function xml2array($val, $disableDoctypes = false, $disableExternals = false) {
        // Check doctype
        if($disableDoctypes && preg_match('/\<\!DOCTYPE.+]\>/', $val)) {
            throw new InvalidArgumentException('XML Doctype parsing disabled');
        }

        // Disable external entity loading
        if($disableExternals) $oldVal = libxml_disable_entity_loader($disableExternals);
        try {
            $xml = new SimpleXMLElement($val);
            $result = self::recursiveXMLToArray($xml);
        } catch(Exception $ex) {
            if($disableExternals) libxml_disable_entity_loader($oldVal);
            throw $ex;
        }
        if($disableExternals) libxml_disable_entity_loader($oldVal);
        return $result;
    }

    /**
     * Convert a XML string to a PHP array recursively. Do not
     * call this function directly, Please use {@link Convert::xml2array()}
     *
     * @param SimpleXMLElement
     *
     * @return mixed
     */
    protected static function recursiveXMLToArray($xml) {
        if(is_object($xml) && get_class($xml) == 'SimpleXMLElement') {
            $attributes = $xml->attributes();
            foreach($attributes as $k => $v) {
                if($v) $a[$k] = (string) $v;
            }
            $x = $xml;
            $xml = get_object_vars($xml);
        }
        if(is_array($xml)) {
            if(count($xml) == 0) return (string) $x; // for CDATA
            foreach($xml as $key => $value) {
                $r[$key] = self::recursiveXMLToArray($value);
            }
            if(isset($a)) $r['@'] = $a; // Attributes
            return $r;
        }

        return (string) $xml;
    }
}