Datetime.php

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<?php
 
/* vim: set expandtab tabstop=4 shiftwidth=4 softtabstop=4 foldmethod=marker: */
 
// LICENSE AGREEMENT. If folded, press za here to unfold and read license {{{ 
 
// }}}
 
// dependencies {{{
require_once 'XML/RPC2/Exception.php';
require_once 'XML/RPC2/Backend/Php/Value/Scalar.php';
// }}}
 
class XML_RPC2_Backend_Php_Value_Datetime extends XML_RPC2_Backend_Php_Value
{
 
    // {{{ constructor
    
    public function __construct($nativeValue) 
    {
        if ((!is_int($nativeValue)) and (!is_float($nativeValue)) and (!is_string($nativeValue)) and (!is_object($nativeValue))) {
            throw new XML_RPC2_InvalidTypeException(sprintf('Cannot create XML_RPC2_Backend_Php_Value_Datetime from type \'%s\'.', gettype($nativeValue)));
        }
        if ((is_object($nativeValue)) &&(strtolower(get_class($nativeValue)) == 'stdclass') && (isset($nativeValue->xmlrpc_type))) {
            $scalar = $nativeValue->scalar;
            $timestamp = $nativeValue->timestamp;  
        } else {
                if ((is_int($nativeValue)) or (is_float($nativeValue))) {
                    $scalar = XML_RPC2_Backend_Php_Value_Datetime::_timestampToIso8601($nativeValue);
                    $timestamp = (int) $nativeValue;
                } elseif (is_string($nativeValue)) {
                    $scalar= $nativeValue;
                    $timestamp = (int) XML_RPC2_Backend_Php_Value_Datetime::_iso8601ToTimestamp($nativeValue);
                } else {
                throw new XML_RPC2_InvalidTypeException(sprintf('Cannot create XML_RPC2_Backend_Php_Value_Datetime from type \'%s\'.', gettype($nativeValue)));
            }
        }
        $tmp              = new stdclass();
        $tmp->scalar      = $scalar;
        $tmp->timestamp   = $timestamp;
        $tmp->xmlrpc_type = 'datetime';
        $this->setNativeValue($tmp);
    }
    
    // }}}
    // {{{ _iso8601ToTimestamp()
    
    private static function _iso8601ToTimestamp($datetime)
    {
        if (!preg_match('/([0-9]{4})(-?([0-9]{2})(-?([0-9]{2})(T([0-9]{2}):([0-9]{2})(:([0-9]{2})(\.([0-9]+))?)?(Z|(([-+])([0-9]{2}):([0-9]{2})))?)?)?)?/', $datetime, $matches)) {
            throw new XML_RPC2_InvalidDateFormatException(sprintf('Provided date \'%s\' is not ISO-8601.', $datetime));
        }
        $year           = $matches[1];
        $month          = array_key_exists(3, $matches) ? $matches[3] : 1;
        $day            = array_key_exists(5, $matches) ? $matches[5] : 1;
        $hour           = array_key_exists(7, $matches) ? $matches[7] : 0;
        $minutes        = array_key_exists(8, $matches) ? $matches[8] : 0;
        $seconds        = array_key_exists(10, $matches) ? $matches[10] : 0;
        $milliseconds   = array_key_exists(12, $matches) ? ((double) ('0.' . $matches[12])) : 0;
        if (array_key_exists(13, $matches)) {
            if ($matches[13] == 'Z') {
                $tzSeconds = 0;                
            } else {
                $tmp = ($matches[15] == '-') ? -1 : 1;
                $tzSeconds = $tmp * (((int) $matches[16]) * 3600 + ((int) $matches[17]) * 60);
            }    
        } else {
            $tzSeconds = 0;
        }
        $result = ((double) @mktime($hour, $minutes, $seconds, $month, $day, $year, 0)) +
                  ((double) $milliseconds) -
                  ((double) $tzSeconds);
        if ($milliseconds==0) return ((int) $result);
        return $result;
    }     
    
    // }}}
    // {{{ _timestampToIso8601()
    
    private static function _timestampToIso8601($timestamp)
    {
        return strftime('%Y%m%dT%H:%M:%S', (int) $timestamp);    
    }
     
    // }}}
    // {{{ decode()
    
    public static function decode($xml) 
    {
        // TODO Remove reparsing of XML fragment, when SimpleXML proves more solid. Currently it segfaults when
        // xpath is used both in an element and in one of its children
        $xml = simplexml_load_string($xml->asXML());
        $value = $xml->xpath('/value/dateTime.iso8601/text()');
        if (!array_key_exists(0, $value)) {
            $value = $xml->xpath('/value/text()');
        }
        // Emulate xmlrpcext results (to be able to switch from a backend to another)
        $result              = new stdclass();
        $result->scalar      = (string) $value[0];
        $result->timestamp   = (int) XML_RPC2_Backend_Php_Value_Datetime::_iso8601ToTimestamp((string) $value[0]);
        $result->xmlrpc_type = 'datetime';
        return $result;
    }
    
    // }}}
    // {{{ encode()
    
    public function encode() 
    {
        $native = $this->getNativeValue();
        return '<dateTime.iso8601>' . $native->scalar . '</dateTime.iso8601>';
    }
    
    // }}}
    
}
 
?>