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<?php
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/* vim: set expandtab tabstop=4 shiftwidth=4 softtabstop=4 foldmethod=marker: */
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// LICENSE AGREEMENT. If folded, press za here to unfold and read license {{{
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/**
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* +-----------------------------------------------------------------------------+
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* | Copyright (c) 2004-2006 Sergio Goncalves Carvalho                                |
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* +-----------------------------------------------------------------------------+
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* | This file is part of XML_RPC2.                                              |
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* |                                                                             |
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* | XML_RPC2 is free software; you can redistribute it and/or modify            |
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* | it under the terms of the GNU Lesser General Public License as published by |
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* | the Free Software Foundation; either version 2.1 of the License, or         |
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* | (at your option) any later version.                                         |
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* |                                                                             |
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* | XML_RPC2 is distributed in the hope that it will be useful,                 |
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* | but WITHOUT ANY WARRANTY; without even the implied warranty of              |
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* | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the               |
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* | GNU Lesser General Public License for more details.                         |
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* |                                                                             |
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* | You should have received a copy of the GNU Lesser General Public License    |
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* | along with XML_RPC2; if not, write to the Free Software                     |
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* | Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA                    |
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* | 02111-1307 USA                                                              |
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* +-----------------------------------------------------------------------------+
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* | Author: Sergio Carvalho <sergio.carvalho@portugalmail.com>                  |
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* +-----------------------------------------------------------------------------+
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*
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* @category   XML
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* @package    XML_RPC2
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* @author     Sergio Carvalho <sergio.carvalho@portugalmail.com>
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* @copyright  2004-2006 Sergio Carvalho
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* @license    http://www.gnu.org/copyleft/lesser.html  LGPL License 2.1
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* @version    CVS: $Id: Base64.php 205681 2006-01-22 01:57:00Z fab $
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* @link       http://pear.php.net/package/XML_RPC2
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*/
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// }}}
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// dependencies {{{
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require_once 'XML/RPC2/Exception.php';
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require_once 'XML/RPC2/Backend/Php/Value/Scalar.php';
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// }}}
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/**
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 * XML_RPC base64 value class. Instances of this class represent base64-encoded string scalars in XML_RPC
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 *
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 * To work on a compatible way with the xmlrpcext backend, we introduce a particular "nativeValue" which is
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 * a standard class (stdclass) with two public properties :
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 * scalar => the string (non encoded)
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 * xmlrpc_type => 'base64'
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 *
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 * The constructor can be called with a "classic" string or with a such object
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 *
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 * @category   XML
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 * @package    XML_RPC2
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 * @author     Sergio Carvalho <sergio.carvalho@portugalmail.com>
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 * @copyright  2004-2006 Sergio Carvalho
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 * @license    http://www.gnu.org/copyleft/lesser.html  LGPL License 2.1
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 * @link       http://pear.php.net/package/XML_RPC2
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 */
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class XML_RPC2_Backend_Php_Value_Base64 extends XML_RPC2_Backend_Php_Value
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{
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    // {{{ constructor
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    /**
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     * Constructor. Will build a new XML_RPC2_Backend_Php_Value_Base64 with the given value
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     *
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     * This class handles encoding-decoding internally. Do not provide the
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     * native string base64-encoded
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     *
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     * @param mixed String $nativeValue to be transmited base64-encoded or "stdclass native value"
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     */
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    public function __construct($nativeValue)
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    {
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        if ((is_object($nativeValue)) &&(strtolower(get_class($nativeValue)) == 'stdclass') && (isset($nativeValue->xmlrpc_type))) {
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            $scalar = $nativeValue->scalar;
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        } else {
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            if (!is_string($nativeValue)) {
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                throw new XML_RPC2_InvalidTypeException(sprintf('Cannot create XML_RPC2_Backend_Php_Value_Base64 from type \'%s\'.', gettype($nativeValue)));
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           }
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            $scalar = $nativeValue;
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        }
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        $tmp              = new stdclass();
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        $tmp->scalar      = $scalar;
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        $tmp->xmlrpc_type = 'base64';
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        $this->setNativeValue($tmp);
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    }
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    // }}}
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    // {{{ encode()
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    /**
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     * Encode the instance into XML, for transport
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     *
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     * @return string The encoded XML-RPC value,
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     */
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    public function encode()
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    {
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        $native = $this->getNativeValue();
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        return '<base64>' . base64_encode($native->scalar) . '</base64>';
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    }
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    // }}}
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    // {{{ decode()
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    /**
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     * Decode transport XML and set the instance value accordingly
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     *
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     * @param mixed $xml The encoded XML-RPC value,
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     */
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    public static function decode($xml)
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    {
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        // TODO Remove reparsing of XML fragment, when SimpleXML proves more solid. Currently it segfaults when
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        // xpath is used both in an element and in one of its children
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        $xml = simplexml_load_string($xml->asXML());
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        $value = $xml->xpath('/value/base64/text()');
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        if (!array_key_exists(0, $value)) {
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            $value = $xml->xpath('/value/text()');
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        }
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        // Emulate xmlrpcext results (to be able to switch from a backend to another)
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        $result = new stdclass();
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        $result->scalar = base64_decode($value[0]);
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        $result->xmlrpc_type = 'base64';
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        return $result;
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    }
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    // }}}
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}
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?>