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caldav_driver.php
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caldav_driver.php
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<?php
/**
* RoundCube Calendar
*
* CalDAV backend based on exemplary DAViCal / AWL client.
*
* @version 0.2 BETA 2
* @author Michael Duelli
* @url http://rc-calendar.lazlo.me
* @licence GNU GPL
* @copyright (c) 2010 Lazlo Westerhof - Netherlands
*/
require_once('caldav-client.php');
class caldav_driver extends calendar_driver
{
private $rcmail = null;
private $cal = null;
private $calendar = null;
/**
* @param object rcmail The RoundCube instance.
* @param string server The CalDAV server.
* @param string user The user name.
* @param string pass The user's password.
* @param string calendar The user calendar.
*/
public function __construct($rcmail, $server, $user, $pass, $calendar) {
$this->rcmail = $rcmail;
$this->calendar = '/' . $calendar;
$this->cal = new CalDAVClient($server. "/" . $user, $user, $pass, $calendar /* is ignored currently */);
$this->cal->setUserAgent('RoundCube');
}
public function new_event($event) {
// FIXME Implement
}
public function edit_event($event) {
// FIXME Implement
}
public function move_event($event) {
// FIXME Implement. Can be done via editEvent
}
public function resize_event($event) {
// FIXME Implement. Can be done via editEvent
}
public function remove_event($event, $force = true) {
// FIXME Implement.
}
public function load_events($start, $end, $calendars = null) {
if (!empty($this->rcmail->user->ID)) {
// Fetch events.
$result = $this->cal->GetEvents($this->GMT_to_iCalendar($start), $this->GMT_to_iCalendar($end), $this->calendar);
$events = array();
foreach ($result as $k => $event) {
$lines = explode("\n", $event['data']);
$n = count($lines);
$eventid = null;
$flag = true;
for ($i = 0; $i < $n; $i++) {
if ($flag) {
if (strpos($lines[$i], "BEGIN:VEVENT") === 0)
$flag = false;
continue;
}
if (strpos($lines[$i], "END:VEVENT") === 0)
break;
if (empty($lines[$i]))
continue; // FIXME
$tmp = explode(":", $lines[$i]);
if (count($tmp) !== 2)
continue; // FIXME
list($id, $value) = $tmp;
if (!isset($id) || !isset($value))
continue; // FIXME
if (is_null($eventid) && strpos($id, "UID") === 0)
$eventid = $value;
elseif (!isset($event['start']) && strpos($id, "DTSTART") === 0) {
$event['start'] = $this->iCalendar_to_Unix($value);
// Check for all-day event.
$event['all_day'] = (strlen($value) === 8 ? 0 : 1);
} elseif (!isset($event['end']) && strpos($id, "DTEND") === 0)
$event['end'] = $this->iCalendar_to_Unix($value);
elseif (!isset($event['title']) && strpos($id, "SUMMARY") === 0)
$event['title'] = $value;
elseif (!isset($event['description']) && strpos($id, "DESCRIPTION") === 0) {
$event['description'] = $value;
// FIXME Problem with multiple lines!
// if ($i+1 < $n && $lines[$i+1] does not contain keyword...) {
// Add line to description
// $i++;
// }
} elseif (!isset($event['location']) && strpos($id, "LOCATION") === 0)
$event['location'] = $value;
elseif (!isset($event['categories']) && strpos($id, "CATEGORIES") === 0)
$event['categories'] = $value;
}
$events[]=array(
'event_id' => $eventid,
'start' => $event['start'],
'end' => $event['end'],
'title' => strval($event['title']),
'description' => strval($event['description']),
'location' => strval($event['location']),
'categories' => $event['categories'],
'allDay' => $event['all_day'],
);
}
return $events;
}
}
/**
* Convert a GMT time stamp ('Y-m-d H:i:s') to the iCalendar format as defined in
* RFC 5545, Section 3.2.19, http://tools.ietf.org/html/rfc5545#section-3.2.19.
*
* @param timestamp A GMT time stamp ('Y-m-d H:i:s')
* @return An iCalendar time stamp, e.g. yyyymmddThhmmssZ
*/
private function GMT_to_iCalendar($timestamp) {
$unix_timestamp = strtotime($timestamp);
return date("Ymd", $unix_timestamp) . "T" . date("His", $unix_timestamp) . "Z";
}
/**
* Convert a time stamp in iCalendar format as defined in
* RFC 5545, Section 3.2.19, http://tools.ietf.org/html/rfc5545#section-3.2.19
* to a Unix time stamp. Further conversion is done in jsonEvents.
*
* @param timestamp An iCalendar time stamp, e.g. yyyymmddThhmmssZ
* @return A Unix time stamp
*/
private function iCalendar_to_Unix($timestamp) {
return strtotime($timestamp);
}
}
?>

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