function getnext($recurrence, $last_xref, JRegistry $params = null)
{
$rule = RedeventHelperRecurrence::getRule($recurrence);
if ($params === null) {
$params =& JComponentHelper::getParams('com_redevent');
}
$week_start = $params->get('week_start', 'SU');
// echo '<pre>';print_r($rule); echo '</pre>';exit;
// print_r($last_xref);
$new = false;
// check the count
if ($rule->until_type == 'count' && $last_xref->count >= $rule->count) {
return false;
}
$days_name = array('SU' => 'sunday', 'MO' => 'monday', 'TU' => 'tuesday', 'WE' => 'wednesday', 'TH' => 'thursday', 'FR' => 'friday', 'SA' => 'saturday');
$days_number = array('SU' => 0, 'MO' => 1, 'TU' => 2, 'WE' => 3, 'TH' => 4, 'FR' => 5, 'SA' => 6, 'SU' => 7);
$xref_start = strtotime($last_xref->dates);
// get the next start timestamp
switch ($rule->type) {
case 'DAILY':
$next_start = strtotime($last_xref->dates . " +" . $rule->interval . " day");
break;
case 'WEEKLY':
// calculate next dates for all set weekdays
$next = array();
if (!$rule->weekdays || !count($rule->weekdays)) {
// force to the day of previous session
$rule->weekdays = array(array_search(date('N', strtotime($last_xref->dates)), $days_number));
}
foreach ($rule->weekdays as $d) {
if ($week_start == 'SU') {
$current = strftime('%w', $xref_start);
} else {
$current = strftime('%u', $xref_start);
}
if ($days_number[$d] > $current) {
$next[] = strtotime('+1 ' . $days_name[$d], strtotime($last_xref->dates));
} else {
if ($days_number[$d] == $current) {
// same day, look in next intervall, after this day
$next[] = strtotime('+' . $rule->interval . ' ' . $days_name[$d], strtotime($last_xref->dates) + 3600 * 24);
} else {
// in next intervall
$next[] = strtotime('+' . $rule->interval . ' ' . $days_name[$d], strtotime($last_xref->dates));
}
}
}
// the next one is the lowest value
$next_start = min($next);
break;
case 'MONTHLY':
if ($rule->monthtype == 'byday') {
// first day of this month
$first_this = mktime(0, 0, 0, strftime('%m', $xref_start), 1, strftime('%Y', $xref_start));
// last day of this month
$last_this = mktime(0, 0, 0, strftime('%m', $xref_start) + 1, 0, strftime('%Y', $xref_start));
// first day of +interval month
$first_next_interval = mktime(0, 0, 0, strftime('%m', $xref_start) + $rule->interval, 1, strftime('%Y', $xref_start));
// last day of this month
$last_next_interval = mktime(0, 0, 0, strftime('%m', $xref_start) + 1 + $rule->interval, 0, strftime('%Y', $xref_start));
$days = array();
// print_r($rule);
foreach ($rule->weeks as $week) {
foreach ($rule->weekdays as $day) {
$int_day = strtotime($week . ' ' . $days_name[$day], $first_this);
if ($int_day > $xref_start && $int_day <= $last_this) {
$days[] = $int_day;
}
$int_day = strtotime($week . ' ' . $days_name[$day], $first_next_interval);
if ($int_day > $xref_start && $int_day <= $last_next_interval) {
$days[] = $int_day;
}
}
}
foreach ($rule->rweeks as $week) {
foreach ($rule->rweekdays as $day) {
$int_day = strtotime('-' . $week . ' ' . $days_name[$day], $last_this + 24 * 3600);
if ($int_day > $xref_start && $int_day >= $first_this) {
$days[] = $int_day;
}
$int_day = strtotime('-' . $week . ' ' . $days_name[$day], $last_next_interval + 24 * 3600);
if ($int_day > $xref_start && $int_day >= $first_next_interval) {
$days[] = $int_day;
}
}
}
$next_start = min($days);
} else {
$current = strftime('%d', strtotime($last_xref->dates));
if (!$rule->bydays || !count($rule->bydays)) {
// force to the day of previous session
$rule->bydays = array(date('d', strtotime($last_xref->dates)));
}
if (!$rule->reverse_bydays) {
sort($rule->bydays);
$next_day = null;
foreach ($rule->bydays as $day) {
if ($day > $current) {
$next_day = $day;
break;
}
}
if ($next_day == null) {
$year_month = strftime('%Y-%m', strtotime(date("Y-m-1", strtotime($last_xref->dates)) . ' + ' . $rule->interval . " months"));
$next_start = strtotime($year_month . '-' . $rule->bydays[0]);
} else {
$year_month = strftime('%Y-%m', strtotime($last_xref->dates));
$next_start = strtotime($year_month . '-' . $next_day);
}
} else {
$current_sec = strtotime($last_xref->dates);
$next = array();
foreach ($rule->bydays as $day) {
// we need to check the dates for this month, and the +interval month
$dd = strtotime(date("Y-m-1", strtotime($last_xref->dates)) . ' + 1 months -' . $day . ' day');
if ($dd > $current_sec) {
$next[] = $dd;
}
$dd = strtotime(date("Y-m-1", strtotime($last_xref->dates)) . ' +' . (1 + $rule->interval) . ' months -' . $day . ' days', strtotime($last_xref->dates));
if ($dd > $current_sec) {
$next[] = $dd;
}
}
// the next is the closest, lower value
$next_start = min($next);
}
}
break;
case 'YEARLY':
$current = strtotime($last_xref->dates);
if (empty($rule->bydays)) {
$next_start = mktime(0, 0, 0, strftime('%m', $current), strftime('%d', $current), strftime('%Y', $current) + $rule->interval);
} else {
if (!$rule->reverse_bydays) {
sort($rule->bydays);
$next_day = $rule->bydays[0];
foreach ($rule->bydays as $day) {
if ($day > $current) {
$next_day = $day;
break;
}
}
if ($next_day == $rule->bydays[0]) {
$next_start = mktime(0, 0, 0, 1, $next_day, strftime('%Y', strtotime($last_xref->dates)) + 1);
} else {
$next_start = mktime(0, 0, 0, 1, $next_day, strftime('%Y', strtotime($last_xref->dates)));
}
} else {
// total days in this year
$total = strftime('%j', mktime(0, 0, 0, 1, 0, strftime('%Y', strtotime($last_xref->dates)) + 1));
$rev_days = array();
// get number in proper order
rsort($rule->bydays);
foreach ($rule->bydays as $day) {
$rev_days[] = $total - $day + 1;
}
$next_day = null;
foreach ($rev_days as $day) {
if ($day > $current) {
$next_day = $day;
break;
}
}
if ($next_day == null) {
$next_start = mktime(0, 0, 0, 1, -$rule->bydays[0], strftime('%Y', strtotime($last_xref->dates)) + 1 + $rule->interval);
} else {
$next_start = mktime(0, 0, 0, 1, $next_day, strftime('%Y', strtotime($last_xref->dates)));
}
}
}
break;
case 'NONE':
default:
break;
}
if (!isset($next_start) || !$next_start) {
return false;
}
// check the until rule
if ($rule->until_type == 'until' && strtotime(strftime('%Y-%m-%d', $next_start) . ' ' . $last_xref->times) > strtotime($rule->until)) {
return false;
}
$delta = $next_start - strtotime($last_xref->dates);
if (!$delta) {
// no delta, so same session...
return false;
}
// return the new occurence
$new = clone $last_xref;
unset($new->id);
$new->dates = strftime('%Y-%m-%d', $next_start);
if (strtotime($last_xref->enddates)) {
$new->enddates = strftime('%Y-%m-%d', strtotime($last_xref->enddates) + $delta);
}
if (strtotime($last_xref->registrationend)) {
$new->registrationend = strftime('%Y-%m-%d', strtotime($last_xref->registrationend) + $delta);
}
$new->count++;
// echo '<pre>';print_r($new); echo '</pre>';exit;
// print_r($new);
// exit;
return $new;
}
/**
* return details about session
*
* @param bool $no_check set true to skip acl check
* @return multitype:
*/
function getSessionDetails($no_check = false)
{
$app =& JFactory::getApplication();
if (empty($this->_xrefdata)) {
$acl =& UserAcl::getInstance();
if ($this->_xref) {
if (!$no_check && !$acl->canEditXref($this->_xref)) {
JError::raiseError(403, JText::_('COM_REDEVENT_NOT_ALLOWED'));
}
$this->_xrefdata = $this->_getXrefData($this->_xref);
} else {
if (!$no_check && !$acl->canAddXref()) {
JError::raiseError(403, JText::_('COM_REDEVENT_NOT_ALLOWED'));
}
$template_xref = $app->getParams()->get('event_template', 0);
if ($template_xref) {
$obj = $this->_getXrefData($template_xref);
} else {
$obj = new stdclass();
$obj->groupid = 0;
$obj->external_registration_url = null;
$obj->details = null;
$obj->maxattendees = 0;
$obj->maxwaitinglist = 0;
$obj->course_credit = 0;
$obj->published = 1;
}
$obj->id = null;
$obj->eventid = 0;
$obj->title = null;
$obj->venueid = 0;
$obj->dates = null;
$obj->enddates = null;
$obj->times = null;
$obj->endtimes = null;
$obj->registrationend = null;
$obj->recurrence_id = 0;
$obj->count = 0;
$obj->rrule = null;
$this->_xrefdata = $obj;
}
}
$this->_xrefdata->rrules = RedeventHelperRecurrence::getRule($this->_xrefdata->rrule);
return $this->_xrefdata;
}
/**
* return xref from request
*
* @return unknown
*/
function getXref()
{
$xref = $this->_id;
if ($xref) {
$customs = $this->_getXCustomFields();
$query = ' SELECT x.*, v.venue, r.id as recurrence_id, r.rrule, rp.count ';
// add the custom fields
foreach ((array) $customs as $c) {
$query .= ', x.custom' . $c->id;
}
$query .= ' FROM #__redevent_event_venue_xref AS x ' . ' LEFT JOIN #__redevent_venues AS v on v.id = x.venueid ' . ' LEFT JOIN #__redevent_repeats AS rp on rp.xref_id = x.id ' . ' LEFT JOIN #__redevent_recurrences AS r on r.id = rp.recurrence_id ';
$query .= ' WHERE x.id = ' . $this->_db->Quote($xref);
$this->_db->setQuery($query);
$object = $this->_db->loadObject();
$object->rrules = RedeventHelperRecurrence::getRule($object->rrule);
} else {
$object = JTable::getInstance('RedEvent_eventvenuexref', '');
$object->id = null;
$object->venue = 0;
$object->recurrence_id = 0;
$object->rrule = '';
$object->count = 0;
$object->rrules = RedeventHelperRecurrence::getRule();
}
return $object;
}
