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egroupware/calendar/inc/class.vCalendar.inc.php

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<?php
/**************************************************************************\
* phpGroupWare - vCalendar Parser *
* http://www.phpgroupware.org *
* Written by Mark Peters <skeeter@phpgroupware.org> *
* -------------------------------------------- *
* This program is free software; you can redistribute it and/or modify it *
* under the terms of the GNU General Public License as published by the *
* Free Software Foundation; either version 2 of the License, or (at your *
* option) any later version. *
\**************************************************************************/
/* $Id$ */
define('FOLD_LENGTH',75);
define('VEVENT',1);
define('VTODO',2);
define('NONE',0);
define('CHAIR',1);
define('REQ_PARTICIPANT',2);
define('OPT_PARTICIPANT',3);
define('NON_PARTICIPANT',4);
define('INDIVIDUAL',1);
define('GROUP',2);
define('RESOURCE',4);
define('ROOM',8);
define('UNKNOWN',16);
define('NEEDS_ACTION',0);
define('ACCEPTED',1);
define('DECLINED',2);
define('TENTATIVE',3);
define('DELEGATED',4);
define('COMPLETED',5);
define('IN_PROCESS',6);
define('PRIVATE',0);
define('PUBLIC',1);
define('CONFIDENTIAL',3);
define('TRANSPARENT',0);
define('OPAQUE',1);
define('_8BIT',0);
define('_BASE64',1);
define('OTHER',99);
class mailto
{
var $user;
var $host;
}
class attendee
{
var $cn = 'Unknown';
var $dir;
var $cutype = INDIVIDUAL;
var $role = REQ_PARTICIPANT;
var $rsvp = 0;
var $mailto;
var $sent_by;
var $delegated_from;
var $delegated_to;
var $member;
var $partstat = NEEDS_ACTION;
}
class vCalendar_time
{
var $year;
var $month;
var $mday;
var $hour;
var $min;
var $sec;
var $date;
var $allday = False;
}
class class_geo
{
var $lat;
var $lon;
}
class rrule
{
var $freq;
var $enddate;
var $interval;
var $count;
var $wkst;
var $byday;
}
class class_text
{
var $cid;
var $fmttype;
var $encoding;
var $altrep;
var $language;
var $value;
}
class vCalendar_item
{
var $type;
var $attendee = Array();
var $organizer;
var $dtstart;
var $dtend;
var $dtstamp;
var $due;
var $created;
var $last_modified;
var $completed;
var $duration;
var $freebusy;
var $location;
var $categories;
var $transp;
var $sequence;
var $percent_complete;
var $attach;
var $calscale;
var $tzid;
var $uid;
var $description;
var $comment;
var $summary;
var $status;
var $priority;
var $class;
var $rrule;
var $resources;
var $request_status;
}
class vCal
{
var $prodid;
var $version;
var $method;
var $event = Array();
var $todo = Array();
}
class vCalendar
{
var $vcal;
var $event = Array();
var $todo = Array();
var $property;
/*
* Base Functions
*/
function vCalendar()
{
$this->property = Array(
'dtstart' => Array(
'type' => 'date-time',
'mangle'=> False,
'state' => Array(
'vevent' => 'required',
'vtodo' => 'optional',
'vfreebusy'=> 'optional',
'vtimezone'=> 'required'
)
),
'dtend' => Array(
'type' => 'date-time',
'mangle'=> False,
'state' => Array(
'vevent' => 'optional',
'vfreebusy'=> 'optional'
)
),
'dtstamp' => Array(
'type' => 'date-time',
'mangle'=> False,
'state' => Array(
'vevent' => 'required',
'vtodo' => 'required',
'vjournal' => 'required',
'vfreebusy'=> 'required'
)
),
'due' => Array(
'type' => 'date-time',
'mangle'=> False,
'state' => Array(
'vtodo' => 'optional'
)
),
'completed' => Array(
'type' => 'date-time',
'mangle'=> False,
'state' => Array(
'vtodo' => 'optional'
)
),
'created' => Array(
'type' => 'date-time',
'mangle'=> False,
'state' => Array(
'vevent' => 'optional',
'vtodo' => 'optional',
'vjournal' => 'optional'
)
),
'last_modified' => Array(
'type' => 'date-time',
'mangle'=> False,
'state' => Array(
'vevent' => 'optional',
'vtodo' => 'optional',
'vjournal' => 'optional',
'vtimezone'=> 'optional'
)
),
'duration' => Array(
'type' => 'duration',
'mangle'=> False,
'state' => Array(
'vevent' => 'optional',
'vtodo' => 'optional',
'vfreebusy'=> 'optional',
'valarm' => 'optional'
)
),
'freebusy' => Array(
'type' => 'freebusy',
'mangle'=> False,
'state' => Array(
'vfreebusy'=> 'optional'
)
),
'attendee' => Array(
'type' => 'cal-address',
'mangle'=> True,
'state' => Array(
'vevent' => 'optional',
'vtodo' => 'optional',
'vjournal' => 'optional'
)
),
'organizer' => Array(
'type' => 'cal-address',
'mangle'=> True,
'state' => Array(
'vevent' => 'optional',
'vtodo' => 'optional',
'vjournal' => 'optional',
'vfreebusy'=> 'optional'
)
),
'rrule' => Array(
'type' => 'recur',
'mangle'=> True,
'state' => Array(
'vevent' => 'optional',
'vtodo' => 'optional',
'vjournal' => 'optional',
'vtimezone'=> 'optional'
)
),
'comment' => Array(
'type' => 'uri',
'mangle'=> True,
'state' => Array(
'vevent' => 'optional',
'vtodo' => 'optional',
'vjournal' => 'optional',
'vtimezone'=> 'optional',
'vfreebusy'=> 'optional'
)
),
'summary' => Array(
'type' => 'text',
'mangle'=> True,
'state' => Array(
'vevent' => 'optional',
'vtodo' => 'optional',
'vjournal' => 'optional',
'valarm' => 'optional'
)
),
'resources' => Array(
'type' => 'text',
'mangle'=> False,
'state' => Array(
'vevent' => 'optional',
'vtodo' => 'optional'
)
),
'description' => Array(
'type' => 'text',
'mangle'=> True,
'state' => Array(
'vevent' => 'optional',
'vtodo' => 'optional',
'vjournal' => 'optional',
'valarm' => 'optional'
)
),
'location' => Array(
'type' => 'text',
'mangle'=> True,
'state' => Array(
'vevent' => 'optional',
'vtodo' => 'optional'
)
),
'priority' => Array(
'type' => 'integer',
'mangle'=> True,
'state' => Array(
'vevent' => 'optional',
'vtodo' => 'optional'
)
),
'calscale' => Array(
'type' => 'text',
'mangle'=> True,
'state' => Array(
'vevent' => 'optional',
'vtodo' => 'optional',
'vjournal' => 'optional',
'valarm' => 'optional'
)
),
'transp' => Array(
'type' => 'text',
'mangle'=> True,
'state' => Array(
'vevent' => 'optional'
)
),
'tzid' => Array(
'type' => 'text',
'mangle'=> True,
'state' => Array(
'vtimezone' => 'required'
)
),
'geo' => Array(
'type' => 'float',
'mangle'=> True,
'state' => Array(
'vevent' => 'optional',
'vtodo' => 'optional'
)
),
'uid' => Array(
'type' => 'text',
'mangle'=> True,
'state' => Array(
'vevent' => 'optional',
'vtodo' => 'optional',
'vjournal' => 'optional',
'vfreebusy'=> 'optional'
)
),
'percent_complete' => Array(
'type' => 'integer',
'mangle'=> True,
'state' => Array(
'vtodo' => 'optional'
)
),
'sequence' => Array(
'type' => 'integer',
'mangle'=> True,
'state' => Array(
'vevent' => 'optional',
'vtodo' => 'optional',
'vjournal' => 'optional'
)
),
'status' => Array(
'type' => 'text',
'mangle'=> True,
'state' => Array(
'vevent' => 'optional',
'vtodo' => 'optional',
'vjournal' => 'optional'
)
),
'class' => Array(
'type' => 'text',
'mangle'=> True,
'state' => Array(
'vevent' => 'optional',
'vtodo' => 'optional',
'vjournal' => 'optional'
)
),
'categories' => Array(
'type' => 'text',
'mangle'=> True,
'state' => Array(
'vevent' => 'optional',
'vtodo' => 'optional',
'vjournal' => 'optional'
)
),
'request_status' => Array(
'type' => 'text',
'mangle'=> True,
'state' => Array(
'vevent' => 'optional',
'vtodo' => 'optional',
'vjournal' => 'optional',
'vfreebusy'=> 'optional'
)
),
'attach' => Array(
'type' => 'uri',
'mangle'=> True,
'state' => Array(
'vevent' => 'optional',
'vtodo' => 'optional',
'vjournal' => 'optional',
'valarm' => 'optional'
)
)
);
}
function set_var(&$event,$type,$value)
{
$type = strtolower(str_replace('-','_',$type));
$event->$type = $value;
}
function unfold(&$vcal_text,$current_line)
{
$next_line = $current_line;
while(ereg("^[ \t]",substr($vcal_text[$next_line + 1],0,1)))
{
$vcal_text[$current_line] = str_replace("\r\n",'',$vcal_text[$current_line]);
$vcal_text[$current_line] .= substr($vcal_text[$next_line + 1],1);
$i = $next_line + 1;
while($i + 1 <= count($vcal_text))
{
$vcal_text[$i] = $vcal_text[$i + 1];
$i++;
}
// $next_line++;
}
}
function fold($str)
{
return chunk_split($str,FOLD_LENGTH,"\r\n");
}
function strip_quotes($str)
{
return str_replace('"','',$str);
}
function split_param(&$return_value,$str,$check_equal)
{
if($check_equal)
{
$str_len = strlen($str);
$i = 0;
$found = False;
while($i < $str_len)
{
$char = substr($str,$i,1);
if(ereg("^[\=\:]",$char))
{
$found = True;
$ret_str = str_replace('=3D','=',str_replace('%20',' ',substr($str,0,$i)));
$return_value[] = $ret_str;
$ret_array = $this->explode_param(substr($str,$i + 1),'"',False);
while(list($key,$value) = each($ret_array))
{
$return_value[] = str_replace('=3D','=',str_replace('%20',' ',$value));
}
$i = $str_len;
}
$i++;
}
if(!$found)
{
$return_value[] = str_replace('=3D','=',str_replace('%20',' ',$str));
}
}
else
{
$return_value[] = rawurldecode($str);
}
}
function explode_param($str,$enclosure,$check_equal)
{
$enclosure_found = 0;
$start = 0;
$return_value = Array();
$str_len = strlen($str);
for($i=0;$i<$str_len;$i++)
{
$char = substr($str,$i,1);
if($char == $enclosure)
{
$enclosure_found = (~ $enclosure_found);
}
elseif(ereg("^[\;\:]",$char))
{
if(! $enclosure_found)
{
$this->split_param($return_value,substr($str,$start,($i - $start)),$check_equal);
$start = $i + 1;
}
}
}
if(! $enclosure_found)
{
$this->split_param($return_value,substr($str,$start,($i - $start)),$check_equal);
}
return $return_value;
}
function from_text($str)
{
$str = str_replace("\\,",",",$str);
$str = str_replace("\\;",";",$str);
$str = str_replace("\\N","\n",$str);
$str = str_replace("\\n","\n",$str);
$str = str_replace("\\\\","\\",$str);
return $str;
}
function to_text($str)
{
$str = str_replace("\\","\\\\",$str);
$str = str_replace(",","\\,",$str);
$str = str_replace(";","\\;",$str);
$str = str_replace("\n","\\n",$str);
return $str;
}
function new_vcal()
{
return new vCal;
}
/*
* Parse Functions
*/
function parse_date($value)
{
$dtime = new vCalendar_time;
if(strpos($value,':'))
{
$pos = explode(':',$value);
$value = $pos[1];
}
$dtime->year = intval(substr($value,0,4));
$dtime->month = intval(substr($value,4,2));
$dtime->mday = intval(substr($value,6,2));
if(substr($value,8,1) == 'T')
{
$dtime->hour = intval(substr($value,9,2));
$dtime->min = intval(substr($value,11,2));
$dtime->sec = intval(substr($value,13,2));
}
else
{
$dtime->hour = 0;
$dtime->min = 0;
$dtime->sec = 0;
}
return $dtime;
}
function parse_address($address)
{
if(strpos(' '.$address,':'))
{
$parts = explode(':',$address);
$address = $parts[1];
}
$parts = explode('@',$address);
if(count($parts) == 2)
{
$temp_address = new mailto;
$temp_address->user = $parts[0];
$temp_address->host = $parts[1];
return $temp_address;
}
else
{
return False;
}
}
function parse_geo(&$event,$value)
{
$return_value = $this->explode_param($value,'"',True);
if(count($return_value) == 2)
{
$event->lat = $return_value[0];
$event->lon = $return_value[1];
}
}
function parse_text(&$event,$value)
{
$return_value = $this->explode_param($value,'"',True);
if(count($return_value) > 0)
{
for($i=0;$i<count($return_value);$i=$i + 2)
{
$type[0] = $return_value[$i];
$type[1] = $this->strip_quotes($return_value[$i+1]);
switch(strtolower($type[0]))
{
case 'altrep':
case 'fmttype':
case 'cid':
case 'language':
$this->set_var($event,strtolower($type[0]),$type[1]);
break;
case 'encoding':
$this->set_var($event,strtolower($type[0]),$this->switch_encoding($type[1]));
break;
case 'value':
break;
default:
if($type[0] <> "\\n")
{
$this->set_var($event,'value',$type[0]);
}
break;
}
}
}
elseif($value <> "\\n")
{
$this->set_var($event,'value',$value);
}
}
function parse_attendee(&$event,$value)
{
$param = $this->explode_param($value,'"',True);
for($j=0;$j<count($param);$j += 2)
{
$type[0] = strtolower($param[$j]);
$type[1] = $this->strip_quotes($param[$j+1]);
switch($type[0])
{
case 'role':
$val = $this->switch_role($type[1]);
break;
case 'partstat':
$val = $this->switch_partstat($type[1]);
break;
case 'rsvp':
$val = $this->switch_rsvp($type[1]);
break;
case 'delegated-from':
case 'delegated-to':
case 'mailto':
$type[0] = str_replace('-','_',$type[0]);
$val = $this->parse_address($type[1]);
break;
case 'dir':
$val = $type[1];
break;
default:
$val = $type[1];
break;
}
$this->set_var($event,$type[0],$val);
}
}
function parse_recurrence(&$event,$value)
{
$return_value = $this->explode_param($value,'"',True);
if(count($return_value) > 0)
{
for($i=0;$i<count($return_value);$i=$i + 2)
{
$type[0] = $return_value[$i];
$type[1] = $this->strip_quotes($return_value[$i+1]);
$this->set_var($event,$type[0],$type[1]);
}
}
}
/*
* Build-Card Functions
*/
function out_organizer_attendee($event)
{
$str = '';
if(!empty($event->cn) && $event->cn <> 'Unknown')
{
$str .= ';CN="'.$event->cn.'"';
}
if(!empty($event->dir))
{
$str .= ';DIR="'.str_replace('=','=3D',str_replace(' ','%20',$event->dir)).'"';
}
if(!empty($event->role))
{
$str .= ';ROLE='.$this->switch_role($event->role);
}
if(!empty($event->rsvp))
{
$str .= ';RSVP='.$this->switch_rsvp($event->rsvp);
}
if(!empty($event->delegated_from->user) && !empty($event->delegated_from->host))
{
$str .= ';DELEGATED-FROM="MAILTO:'.$event->delegated_from->user.'@'.$event->delegated_from->host.'"';
}
if(!empty($event->delegated_to->user) && !empty($event->delegated_to->host))
{
$str .= ';DELEGATED-TO="MAILTO:'.$event->delegated_to->user.'@'.$event->delegated_to->host.'"';
}
if(!empty($event->mailto->user) && !empty($event->mailto->host))
{
$str .= ':MAILTO:'.$event->mailto->user.'@'.$event->mailto->host;
}
return $str;
}
function build_text($event,$mangle)
{
$str = '';
if(!empty($event->cid))
{
$str .= ';CID="'.$event->cid.'"';
}
if(!empty($event->altrep))
{
$str .= ';ALTREP="'.$event->altrep.'"';
}
if(!empty($event->fmttype))
{
$str .= ';FMTTYPE='.$event->fmttype;
}
if(!empty($event->encoding))
{
$str .= ';ENCODING='.$this->switch_encoding($event->encoding);
}
if(!empty($event->value))
{
if($mangle)
{
$event->value = $this->to_text($event->value);
}
$str .= ':'.$event->value;
}
// else
// {
// $str .= ':\n';
// }
return $str;
}
function build_rrule($event)
{
$var = Array(
'freq',
'count',
'wkst',
'byday'
);
for($i=0;$i<count($var);$i++)
{
iF(!empty($event->{$var[$i]}))
{
$str[] = strtoupper($var[$i]).'='.$event->{$var[$i]};
}
}
return implode($str,';');
}
function build_time($event)
{
return ':'.date('Ymd\THms\Z',mktime($event->year,$event->month,$event->mday,$event->hour,$event->min,$event->sec));
}
function build_card_internals($ical_item,$event)
{
reset($this->property);
while(list($key,$varray) = each($this->property))
{
$value = $key;
$type = $varray['type'];
$mangle = $varray['mangle'];
$state = $varray['state'][$ical_item];
if(@$state == 'optional' || @$state == 'required')
{
switch($type)
{
case 'date-time':
switch($value)
{
case 'last_modified':
$str .= $this->fold(strtoupper(str_replace('_','-',$value)).':'.gmdate('Ymd\THms\Z'));
break;
default:
if(!empty($event->$value))
{
$str .= $this->fold(strtoupper($value).$this->build_time($event->$value));
}
elseif($value == 'dtstamp' || $value == 'created')
{
$str .= $this->fold(strtoupper($value).':'.gmdate('Ymd\THms\Z'));
}
break;
}
break;
case 'uri':
if(!empty($event->$value))
{
for($i=0;$i<count($event->$value);$i++)
{
$str .= $this->fold(strtoupper($value).$this->build_text($event->{$value}[$i],$mangle));
}
}
break;
case 'recur':
if(!empty($event->$value))
{
$str .= $this->fold(strtoupper($value).':'.$this->build_rrule($event->$value));
}
break;
case 'integer':
if(!empty($event->$value))
{
$str .= $this->fold(strtoupper(str_replace('_','-',$value)).':'.$event->$value);
}
elseif($value == 'sequence' || $value == 'percent_complete')
{
$str .= $this->fold(strtoupper(str_replace('_','-',$value)).':0');
}
break;
case 'float':
if(!empty($event->$value))
{
$str .= $this->fold(strtoupper(str_replace('_','-',$value)).':'.$event->$value->lat.';'.$event->$value->lon);
}
break;
case 'text':
if(empty($event->$value) && $state == 'required')
{
return '';
}
if(!empty($event->$value))
{
$str .= $this->fold(strtoupper(str_replace('_','-',$value)).$this->build_text($event->$value,$mangle));
}
break;
}
}
}
return $str;
}
/*
* Switching Functions
*/
function switch_encoding($var)
{
if(gettype($var) == 'string')
{
switch($var)
{
case '8BIT':
return _8BIT;
break;
case 'BASE64':
return _BASE64;
break;
default:
return OTHER;
break;
}
}
elseif(gettype($var) == 'integer')
{
switch($var)
{
case _8BIT:
return '8BIT';
break;
case _BASE64:
return 'BASE64';
break;
case OTHER:
return 'OTHER';
break;
}
}
else
{
return $var;
}
}
function switch_role($var)
{
if(gettype($var) == 'string')
{
switch($var)
{
case 'NONE':
return NONE;
break;
case 'CHAIR':
return CHAIR;
break;
case 'REQ-PARTICIPANT':
return REQ_PARTICIPANT;
break;
case 'OPT-PARTICIPANT':
return OPT_PARTICIPANT;
break;
case 'NON-PARTICIPANT':
return NON_PARTICIPANT;
break;
}
}
elseif(gettype($var) == 'integer')
{
switch($var)
{
case NONE:
return 'NONE';
break;
case CHAIR:
return 'CHAIR';
break;
case REQ_PARTICIPANT:
return 'REQ-PARTICIPANT';
break;
case OPT_PARTICIPANT:
return 'OPT-PARTICIPANT';
break;
case NON_PARTICIPANT:
return 'NON-PARTICIPANT';
break;
}
}
else
{
return $var;
}
}
function switch_partstat($var)
{
if(gettype($var) == 'string')
{
switch($var)
{
case 'NEEDS-ACTION':
return NEEDS_ACTION;
break;
case 'ACCEPTED':
return ACCEPTED;
break;
case 'DECLINED':
return DECLINED;
break;
case 'TENTATIVE':
return TENTATIVE;
break;
case 'DELEGATED':
return DELEGATED;
break;
case 'COMPLETED':
return COMPLETED;
break;
case 'IN-PROCESS':
return IN_PROCESS;
break;
default:
return OTHER;
break;
}
}
elseif(gettype($var) == 'integer')
{
switch($var)
{
case NEEDS_ACTION:
return 'NEEDS-ACTION';
break;
case ACCEPTED:
return 'ACCEPTED';
break;
case DECLINED:
return 'DECLINED';
break;
case TENTATIVE:
return 'TENTATIVE';
break;
case DELEGATED:
return 'DELEGATED';
break;
case COMPLETED:
return 'COMPLETED';
break;
case IN_PROCESS:
return 'IN-PROCESS';
break;
default:
return 'X-OTHER';
break;
}
}
else
{
return $var;
}
}
function switch_rsvp($var)
{
if(gettype($var) == 'string')
{
if($var == 'TRUE')
{
return 1;
}
else
{
return 0;
}
}
elseif(gettype($var) == 'integer')
{
if($var == 1)
{
return 'TRUE';
}
else
{
return 'FALSE';
}
}
else
{
return $var;
}
}
function switch_class($var)
{
if(gettype($var) == 'string')
{
switch($var)
{
case 'PRIVATE':
return PRIVATE;
break;
case 'PUBLIC':
return PUBLIC;
break;
case 'CONFIDENTIAL':
return CONFIDENTIAL;
break;
}
}
elseif(gettype($var) == 'integer')
{
switch($var)
{
case PRIVATE:
return 'PRIVATE';
break;
case PUBLIC:
return 'PUBLIC';
break;
case CONFIDENTIAL:
return 'CONFIDENTIAL';
break;
}
}
else
{
return $var;
}
}
function switch_transp($var)
{
if(gettype($var) == 'string')
{
switch($var)
{
case 'TRANSPARENT':
return TRANSPARENT;
break;
case 'OPAQUE':
return OPAQUE;
break;
}
}
elseif(gettype($var) == 'integer')
{
switch($var)
{
case TRANSPARENT:
return 'TRANSPARENT';
break;
case OPAQUE:
return 'OPAQUE';
break;
}
}
else
{
return $var;
}
}
/*
* The brunt of the class
*/
function read($vcal_text)
{
$i = 0;
$mode = 'none';
while(chop($vcal_text[$i]) != '')
{
// if(strlen($vcal_text[$i]) > 75)
// {
// continue;
// }
$this->unfold($vcal_text,$i);
$vcal_text[$i] = str_replace("\r\n",'',$vcal_text[$i]);
// echo "TEXT : ".$vcal_text[$i]."<br>\n";
// Example #1
//vcal_text[$i] = 'BEGIN:VCALENDAR'
// Example #2
//vcal_text[$i] = 'METHOD:REQUEST'
// Example #3
//vcal_text[$i] = 'ATTENDEE;CN="John Doe";ROLE=REQ-PARTICIPANT;RSVP=TRUE:MAILTO:john.doe@somewhere.com'
// Example #4
//vcal_text[$i] = 'ORGANIZER;DIR="ldap://host.com:6666/o=eDABC%20Industries,c=3DUS??(cn=3DBJim%20Dolittle)":MAILTO:John.Doe@somewhere.com'
// Example #5
//vcal_text[$i] = 'DTSTART:20010302T150000Z'
// Example #6
//vcal_text[$i] = 'UID:040000008200E00074C5B7101A82E0080000000040A12C0042A2C0010000000000000000100'
//vcal_text[$i+1] = ' 000009BDFF7C7650ED5118DD700805FA71291'
// When unfolded becomes,
//vcal_text[$i] = 'UID:040000008200E00074C5B7101A82E0080000000040A12C0042A2C0010000000000000000100000009BDFF7C7650ED5118DD700805FA71291'
$colon = strpos($vcal_text[$i],':');
if($colon == 0)
{
$colon = 65535;
}
$semi_colon = strpos($vcal_text[$i],';');
if($semi_colon == 0)
{
$semi_colon = 65535;
}
if($colon == 65535 && $semi_colon == 65535)
{
continue;
}
else
{
$min_value = min($colon,$semi_colon);
$majortype = strtolower(substr($vcal_text[$i],0,$min_value));
$vcal_text[$i] = chop(substr($vcal_text[$i],$min_value + 1));
$value = $vcal_text[$i];
}
$mtype = str_replace('-','_',$majortype);
if($mtype == 'begin' || $mtype == 'end')
{
$mode = 'none';
}
if($mode != 'none')
{
if(isset($this->property[$mtype]))
{
$state = @$this->property[$mtype]['state']["$mode"];
}
else
{
$state = '';
}
}
else
{
$state = 'required';
}
if($state == 'optional' || $state == 'required')
{
switch($mtype)
{
case 'begin':
switch(strtolower($value))
{
case 'vcalendar':
$vcal = $this->new_vcal();
break;
case 'vevent':
$mode = 'vevent';
$event = new vCalendar_item;
$event->type = strtolower($value);
break;
case 'vtodo':
$mode = 'vtodo';
$event = new vCalendar_item;
$event->type = strtolower($value);
break;
}
break;
case 'prodid':
case 'version':
case 'method':
$this->parse_text($vcal->$majortype,$this->from_text($value));
break;
case 'geo':
$event->$majortype = new class_geo;
$this->parse_geo($event->$majortype,$value);
break;
case 'description':
case 'location':
case 'summary':
case 'calscale':
case 'tzid':
case 'transp':
case 'uid':
case 'class':
case 'status':
case 'categories':
case 'resources':
case 'request_status':
$event->$majortype = new class_text;
$this->parse_text($event->$majortype,$this->from_text($value));
break;
case 'attach':
$attach = new class_text;
$this->parse_text($attach,$this->from_text($value));
$event->attach[] = $attach;
unset($attach);
break;
case 'comment':
$comment = new class_text;
$this->parse_text($comment,$this->from_text($value));
$event->comment[] = $comment;
unset($comment);
break;
case 'percent_complete':
$this->set_var($event,str_replace('-','_',$majortype),$value);
break;
case 'attendee':
$attendee = new attendee;
$this->parse_attendee($attendee,$value);
$event->attendee[] = $attendee;
unset($attendee);
break;
case 'organizer':
$event->$majortype = new attendee;
$this->parse_attendee($event->$majortype,$value);
break;
case 'due':
case 'completed':
case 'duration':
case 'freebusy':
case 'dtstart':
case 'dtend':
case 'dtstamp':
case 'created':
case 'last_modified':
$this->set_var($event,$majortype,$this->parse_date($value));
break;
case 'rrule':
$event->$majortype = new $majortype;
$this->parse_recurrence($event->$majortype,$value);
break;
case 'end':
$mode = 'none';
switch(strtolower($value))
{
case 'vevent':
$this->event[] = $event;
unset($event);
break;
case 'vtodo':
$this->todo[] = $event;
unset($event);
break;
case 'vcalendar':
$this->vcal = $vcal;
$this->vcal->event = $this->event;
$this->vcal->todo = $this->todo;
break 2;
}
break;
default:
$this->set_var($event,$majortype,$value);
break;
}
}
$i++;
}
return $this->vcal;
}
function build_vcal($vcal)
{
$str = 'BEGIN:VCALENDAR'."\r\n";
$str .= $this->fold('PRODID'.$this->build_text($vcal->prodid));
$str .= $this->fold('VERSION'.$this->build_text($vcal->version));
$str .= $this->fold('METHOD'.$this->build_text($vcal->method));
if($vcal->event)
{
for($i=0;$i<count($vcal->event);$i++)
{
$str .= 'BEGIN:VEVENT'."\r\n";
for($j=0;$j<count($vcal->event[$i]->attendee);$j++)
{
$temp_attendee = $this->out_organizer_attendee($vcal->event[$i]->attendee[$j]);
if($temp_attendee)
{
$str .= $this->fold('ATTENDEE'.$temp_attendee);
}
}
if(!empty($vcal->event[$i]->organizer))
{
$str .= $this->fold('ORGANIZER'.$this->out_organizer_attendee($vcal->event[$i]->organizer));
}
$str .= $this->build_card_internals('vevent',$vcal->event[$i]);
$str .= 'END:VEVENT'."\r\n";
}
}
if($vcal->todo)
{
for($i=0;$i<count($vcal->todo);$i++)
{
$str .= 'BEGIN:VTODO'."\r\n";
$str .= $this->build_card_internals('vtodo',$vcal->todo[$i]);
$str .= 'END:VTODO'."\r\n";
}
}
$str .= 'END:VCALENDAR'."\r\n";
return $str;
}
}
?>
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