function getRepetitiveInstances($from_date, $to_date)
{
$instances = array();
if ($this->isRepetitive()) {
$res = $this->forwardRepDate($from_date);
$ref_date = $res['date'];
$top_repeat_num = $this->getRepeatNum() - $res['count'];
$last_repeat = $this->getRepeatEnd() instanceof DateTimeValue ? new DateTimeValue($this->getRepeatEnd()->getTimestamp()) : null;
if ($this->getRepeatNum() > 0 && $top_repeat_num <= 0 || $last_repeat instanceof DateTimeValue && $last_repeat->getTimestamp() < $ref_date->getTimestamp()) {
return array();
}
$info = array();
foreach ($this->getColumns() as $col) {
$info[$col] = $this->getColumnValue($col);
}
foreach ($this->getObject()->getColumns() as $col) {
$info[$col] = $this->getObject()->getColumnValue($col);
}
$event = new ProjectEvent();
$event->setFromAttributes($info);
$event->setStart(new DateTimeValue($this->getStart()->getTimestamp()));
$event->setDuration(new DateTimeValue($this->getDuration()->getTimestamp()));
$event->setId($this->getId());
$event->setNew(false);
$event->setInvitations($this->getInvitations());
if (!$event->getRepeatH() > 0) {
$instances[] = $event;
}
$num_repetitions = 0;
while ($ref_date->getTimestamp() < $to_date->getTimestamp()) {
if (!$event->getStart() instanceof DateTimeValue) {
return $instances;
}
$diff = $ref_date->getTimestamp() - $event->getStart()->getTimestamp();
$event->setStart(new DateTimeValue($ref_date->getTimestamp()));
if ($event->getDuration() instanceof DateTimeValue) {
$event->getDuration()->advance($diff);
}
$info = array();
foreach ($event->getColumns() as $col) {
$info[$col] = $event->getColumnValue($col);
}
foreach ($event->getObject()->getColumns() as $col) {
$info[$col] = $event->getObject()->getColumnValue($col);
}
$new_event = new ProjectEvent();
$new_event->setFromAttributes($info);
$new_event->setId($event->getId());
$new_event->setNew(false);
$new_event->setInvitations($event->getInvitations());
$new_due_date = null;
$new_st_date = null;
if ($event->getStart() instanceof DateTimeValue) {
$new_st_date = new DateTimeValue($event->getStart()->getTimestamp());
}
if ($event->getDuration() instanceof DateTimeValue) {
$new_due_date = new DateTimeValue($event->getDuration()->getTimestamp());
}
if ($event->getRepeatD() > 0) {
if ($new_st_date instanceof DateTimeValue) {
$new_st_date = $new_st_date->add('d', $event->getRepeatD());
}
if ($new_due_date instanceof DateTimeValue) {
$new_due_date = $new_due_date->add('d', $event->getRepeatD());
}
$ref_date->add('d', $event->getRepeatD());
} else {
if ($event->getRepeatM() > 0) {
if ($new_st_date instanceof DateTimeValue) {
$new_st_date = $new_st_date->add('M', $event->getRepeatM());
}
if ($new_due_date instanceof DateTimeValue) {
$new_due_date = $new_due_date->add('M', $event->getRepeatM());
}
$ref_date->add('M', $event->getRepeatM());
} else {
if ($event->getRepeatY() > 0) {
if ($new_st_date instanceof DateTimeValue) {
$new_st_date = $new_st_date->add('y', $event->getRepeatY());
}
if ($new_due_date instanceof DateTimeValue) {
$new_due_date = $new_due_date->add('y', $event->getRepeatY());
}
$ref_date->add('y', $event->getRepeatY());
} else {
if ($event->getRepeatH() > 0) {
$ordinal = 'first ';
switch ($event->getRepeatWnum()) {
case 1:
$ordinal = "first ";
break;
case 2:
$ordinal = "second ";
break;
case 3:
$ordinal = "third ";
break;
case 4:
$ordinal = "fourth ";
break;
}
$days = array("0" => 'sunday ', "1" => 'monday ', "2" => 'tuesday ', "3" => 'wednesday ', "4" => 'thursday ', "5" => 'friday ', "6" => 'saturday ');
$day_name = $days[$event->getRepeatDow() - 1];
if ($new_st_date instanceof DateTimeValue) {
//set first day of the month
$new_st_date->setDay(1);
//date string
$new_st_date_string = date("c", $new_st_date->getTimestamp());
//go to the fixed day
$new_st_date_fixed = new DateTime(date("c", strtotime($ordinal . $day_name . " of " . $new_st_date_string)));
$new_st_date = new DateTimeValue($new_st_date_fixed->getTimestamp());
}
if ($new_due_date instanceof DateTimeValue) {
//set first day of the month
$new_due_date->setDay(1);
//date string
$new_due_date_string = date("c", $new_due_date->getTimestamp());
//go to the fixed day
$new_due_date_fixed = new DateTime(date("c", strtotime($ordinal . $day_name . " of " . $new_due_date_string)));
$new_due_date = new DateTimeValue($new_due_date_fixed->getTimestamp());
}
$ref_date->add('M', $event->getRepeatMjump());
}
}
}
}
if ($new_st_date instanceof DateTimeValue) {
$new_event->setStart($new_st_date);
}
if ($new_due_date instanceof DateTimeValue) {
$new_event->setDuration($new_due_date);
}
$num_repetitions++;
if ($top_repeat_num > 0 && $top_repeat_num == $num_repetitions) {
break;
}
if ($last_repeat instanceof DateTimeValue && $last_repeat->getTimestamp() < $ref_date->getTimestamp()) {
break;
}
$instances[] = $new_event;
$event = $new_event;
}
}
return $instances;
}