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<?php
/* vim: set expandtab tabstop=4 shiftwidth=4 softtabstop=4: */
/**
* Helper for parsing iCalendar format
*
* Long description for file (if any)...
*
* PHP versions 4 & 5
*
* LICENSE: This source file is subject to version 3.0 of the PHP license
* that is available through the world-wide-web at the following URI:
* http://www.php.net/license/3_0.txt. If you did not receive a copy of
* the PHP License & are unable to obtain it through the web, please
* send a note to license@php.net so we can mail you a copy immediately
*
* @category HTTP
* @package HTTP_CalDAV_Server
* @author Jack Bates <ms419@freezone.co.uk>
* @copyright 2006 The PHP Group
* @license PHP License 3.0 http://www.php.net/license/3_0.txt
* @version CVS: $Id: ICalendarParser.php,v 1.1 2006/04/18 03:22:12 jablko Exp $
* @link http://pear.php.net/package/HTTP_CalDAV_Server
* @see HTTP_WebDAV_Server
*/
/**
* Helper for parsing iCalendar format
*
* Long description
*
* @category HTTP
* @package HTTP_CalDAV_Server
* @author Jack Bates <ms419@freezone.co.uk>
* @copyright 2006 The PHP Group
* @license PHP License 3.0 http://www.php.net/license/3_0.txt
* @version CVS: $Id: ICalendarParser.php,v 1.1 2006/04/18 03:22:12 jablko Exp $
* @link http://pear.php.net/package/HTTP_CalDAV_Server
* @see HTTP_WebDAV_Server
*/
class ICalendarParser
{
/**
* Success state flag
*
* @var bool
* @access public
*/
var $success = false;
/**
* Parsed components are collected here in post-order
*
* @var array
* @access public
*/
var $comps = array();
/**
* Parsed components' offsets are collected here in post-order
*
* @var array
* @access public
*/
var $offsets = array();
/**
* Constructor
*
* @param resource input stream handle
* @access public
*/
function ICalendarParser($handle, $beginOffset=null, $endOffset=null,
$value=null, $filters=null)
{
$comps = array();
$beginOffsets = array();
$compValues = array($value);
$compFilters = array($filters);
$this->success = true;
while (($offset = ftell($handle)) !== false &&
($line = fgets($handle, 4096)) !== false) {
if (isset($endOffset) && $offset > $endOffset) {
return;
}
$line = explode(':', trim($line));
if ($line[0] == 'END') {
if ($line[1] != $comps[count($comps) - 1]->name) {
$this->success = false;
return;
}
if (is_array($compFilters[count($compFilters) - 1]['filters'])) {
foreach ($compFilters[count($compFilters) - 1]['filters'] as $filter) {
if ($filter['name'] == 'time-range') {
if ($filter['value']['start'] > $comps[count($comps) - 1]->properties['DTEND'][0]->value || $filter['value']['end'] < $comps[count($comps) - 1]->properties['DTSTART'][0]->value) {
array_pop($compValues);
array_pop($compFilters);
continue;
}
}
}
}
if (count($comps) > 1 &&
!$comps[count($comps) - 2]->add_component($comps[count(
$comps) - 1])) {
$this->success = false;
return;
}
if (($offset = ftell($handle)) === false) {
$this->success = false;
return;
}
$this->comps[] = array_pop($comps);
$this->offsets[] = array(array_pop($beginOffsets), $offset);
array_pop($compValues);
array_pop($compFilters);
continue;
}
if ($line[0] == 'BEGIN') {
$compName = $line[1];
if (is_array($compValues[count($compValues) - 1]['comps']) &&
!isset($compValues[count($compValues) - 1]['comps'][$compName])) {
while (($line = fgets($handle, 4096)) !== false) {
if (trim($line) == "END:$compName") {
continue (2);
}
}
$this->success = false;
return;
}
$className = 'iCalendar_' . ltrim(strtolower($compName), 'v');
if ($line[1] == 'VCALENDAR') {
$className = 'iCalendar';
}
if (!class_exists($className)) {
while (($line = fgets($handle, 4096)) !== false) {
if (trim($line) == "END:$compName") {
continue (2);
}
}
$this->success = false;
return;
}
$comps[] = new $className;
$beginOffsets[] = $offset;
$compValues[] = $compValues[count($compValues) - 1]['comps'][$compName];
$compFilters[] = $compFilters[count($compFilters) - 1]['comps'][$compName];
continue;
}
$line[0] = explode(';=', $line[0]);
$propName = array_shift($line[0]);
if (is_array($compValues[count($compValues) - 1]['props']) &&
!in_array($propName,
$compValues[count($compValues) - 1]['props'])) {
continue;
}
$params = array();
while (!empty($line[0])) {
$params[array_shift($line[0])] = array_shift($line[0]);
}
$comps[count($comps) - 1]->add_property($propName, $line[1], $params);
}
if (!feof($handle)) {
$this->success = false;
}
}
}
/*
* Local variables:
* tab-width: 4
* c-basic-offset: 4
* c-handling-comment-ender-p: nil
* End:
*/
?>
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