<?php
/**
 * Sxml.php
 * utils of sxml.
 * @version    150810:1
 * @author     karminski <code.karminski@outlook.com>
 * 
 */

/**
 * class Sxml
 */
class Sxml{

    const SXML_ATOM_TMPL      = '<%s:%s>';

    /**
     * [encryptSxml description]
     * @param  [type] &$data   [description]
     * @param  string &$retval [description]
     * @return [type]          [description]
     */
    public static function encrypt(&$data, &$retval = ""){
        foreach($data as $key => $value){
            $retval .= sprintf(self::SXML_ATOM_TMPL, $key, $value);
        }
        return;
    } 

    /**
     * [decryptSxml description]
     * @param  [type] $line [description]
     * @return [type]       [description]
     */
    public static function decrypt(&$line, &$retval = array()){
        $stage1    = explode("><", $line);
        $stage1Len = count($stage1);
        // single field
        if($stage1Len===1){
                return false;
        }
        // multifield ok
        foreach($stage1 as $serial => $subLine){
            if($serial === 0){
                $subLine = str_replace("<", "", $subLine);
            }
            if($serial === ($stage1Len-1)){
                $subLine = str_replace(">", "", $subLine);
            }
            $stage2 = explode(":", $subLine);
            $key    = $stage2[0];
            unset($stage2[0]);
            $value  = implode(":", $stage2); // avoide ":" in data
            $retval[$key] = $value;
        }
        return true;
    }

}