/**
* Create instances of a recurring event
*
* @param array Hash array with event properties
* @param object DateTime Start date of the recurrence window
* @param object DateTime End date of the recurrence window
* @param string ID of a specific recurring event instance
* @return array List of recurring event instances
*/
public function get_recurring_events($event, $start, $end = null, $event_id = null)
{
$object = $event['_formatobj'];
if (!$object) {
$rec = $this->storage->get_object($event['id']);
$object = $rec['_formatobj'];
}
if (!is_object($object)) {
return array();
}
// determine a reasonable end date if none given
if (!$end) {
switch ($event['recurrence']['FREQ']) {
case 'YEARLY':
$intvl = 'P100Y';
break;
case 'MONTHLY':
$intvl = 'P20Y';
break;
default:
$intvl = 'P10Y';
break;
}
$end = clone $event['start'];
$end->add(new DateInterval($intvl));
}
// add recurrence exceptions to output
$i = 0;
$events = array();
$exdates = array();
$futuredata = array();
if (is_array($event['recurrence']['EXCEPTIONS'])) {
// copy the recurrence rule from the master event (to be used in the UI)
$recurrence_rule = $event['recurrence'];
unset($recurrence_rule['EXCEPTIONS'], $recurrence_rule['EXDATE']);
foreach ($event['recurrence']['EXCEPTIONS'] as $exception) {
$rec_event = $this->_to_rcube_event($exception);
$rec_event['id'] = $event['uid'] . '-' . ++$i;
$rec_event['recurrence_id'] = $event['uid'];
$rec_event['recurrence'] = $recurrence_rule;
$rec_event['_instance'] = $i;
$rec_event['isexception'] = 1;
$events[] = $rec_event;
// found the specifically requested instance, exiting...
if ($rec_event['id'] == $event_id) {
$this->events[$rec_event['id']] = $rec_event;
return $events;
}
// remember this exception's date
$exdate = $rec_event['start']->format('Y-m-d');
$exdates[$exdate] = $rec_event['id'];
if ($rec_event['thisandfuture']) {
$futuredata[$exdate] = $rec_event;
}
}
}
// use libkolab to compute recurring events
if (class_exists('kolabcalendaring')) {
$recurrence = new kolab_date_recurrence($object);
} else {
// fallback to local recurrence implementation
require_once $this->cal->home . '/lib/calendar_recurrence.php';
$recurrence = new calendar_recurrence($this->cal, $event);
}
while ($next_event = $recurrence->next_instance()) {
// skip if there's an exception at this date
$datestr = $next_event['start']->format('Y-m-d');
if ($exdates[$datestr]) {
// use this event data for future recurring instances
if ($futuredata[$datestr]) {
$overlay_data = $futuredata[$datestr];
}
continue;
}
// add to output if in range
$rec_id = $event['uid'] . '-' . ++$i;
if ($next_event['start'] <= $end && $next_event['end'] >= $start || $event_id && $rec_id == $event_id) {
$rec_event = $this->_to_rcube_event($next_event);
if ($overlay_data) {
// copy data from a 'this-and-future' exception
$this->_merge_event_data($rec_event, $overlay_data);
}
$rec_event['id'] = $rec_id;
$rec_event['recurrence_id'] = $event['uid'];
$rec_event['_instance'] = $i;
unset($rec_event['_attendees']);
$events[] = $rec_event;
if ($rec_id == $event_id) {
$this->events[$rec_id] = $rec_event;
break;
}
} else {
if ($next_event['start'] > $end) {
// stop loop if out of range
break;
}
}
// avoid endless recursion loops
if ($i > 1000) {
break;
}
}
return $events;
}
/**
*
*/
private function get_recurrence_count($event, $dtstart)
{
// use libkolab to compute recurring events
if (class_exists('kolabcalendaring') && $event['_formatobj']) {
$recurrence = new kolab_date_recurrence($event['_formatobj']);
} else {
// fallback to local recurrence implementation
require_once $this->cal->home . '/lib/calendar_recurrence.php';
$recurrence = new calendar_recurrence($this->cal, $event);
}
$count = 0;
while (($next_event = $recurrence->next_instance()) && $next_event['start'] <= $dtstart && $count < 1000) {
$count++;
}
return $count;
}
/**
* Create instances of a recurring event
*
* @param array Hash array with event properties
* @param object DateTime Start date of the recurrence window
* @param object DateTime End date of the recurrence window
* @return array List of recurring event instances
*/
public function get_recurring_events($event, $start, $end = null)
{
$events = array();
if ($event['recurrence']) {
// include library class
require_once dirname(__FILE__) . '/../lib/calendar_recurrence.php';
$rcmail = rcmail::get_instance();
$recurrence = new calendar_recurrence($rcmail->plugins->get_plugin('calendar'), $event);
// determine a reasonable end date if none given
if (!$end) {
switch ($event['recurrence']['FREQ']) {
case 'YEARLY':
$intvl = 'P100Y';
break;
case 'MONTHLY':
$intvl = 'P20Y';
break;
default:
$intvl = 'P10Y';
break;
}
$end = clone $event['start'];
$end->add(new DateInterval($intvl));
}
$i = 0;
while ($next_event = $recurrence->next_instance()) {
$next_event['uid'] = $event['uid'] . '-' . ++$i;
// add to output if in range
if ($next_event['start'] <= $end && $next_event['end'] >= $start) {
$next_event['id'] = $next_event['uid'];
$next_event['recurrence_id'] = $event['uid'];
$next_event['_instance'] = $i;
$events[] = $next_event;
} else {
if ($next_event['start'] > $end) {
// stop loop if out of range
break;
}
}
// avoid endless recursion loops
if ($i > 1000) {
break;
}
}
}
return $events;
}
