/**
* Fetches the next occurance for a repeating event.
*
* @param array The event array
* @param array The range of start/end timestamps
* @param int The last occurance of this event
* @param boolean True if this is our first iteration of this function (Does some special optimised calculations on false)
* @return int The next occurance timestamp
*/
function fetch_next_occurance($event, $range, $last_occurance, $first = false)
{
$new_time = $last_occurance;
$repeats = $event['repeats'];
$start_day = explode("-", gmdate("j-n-Y", $event['starttime_user']));
$start_date = gmmktime(0, 0, 0, $start_day[1], $start_day[0], $start_day[2]);
if ($repeats['repeats'] == 0) {
$new_time += 86400;
} else {
if ($repeats['repeats'] == 1) {
// If this isn't the first time we've called this function then we can just tack on the time since $last_occurance
if ($first == false) {
$new_time += 86400 * $repeats['days'];
} else {
// Need to count it out
if ($range['start'] > $event['starttime']) {
$days_since = ceil(($range['start'] - $start_date) / 86400);
$occurances = floor($days_since / $repeats['days']);
$next_date = $occurances * $repeats['days'];
$new_time = $event['starttime'] + 86400 * $next_date;
} else {
$new_time = $start_date;
}
}
} else {
if ($repeats['repeats'] == 2) {
if ($first == false) {
$last_dow = gmdate("w", $last_occurance);
// Last day of week = friday, +3 gives monday
if ($last_dow == 5) {
$new_time += 86400 * 3;
} else {
$new_time += 86400;
}
} else {
if ($range['start'] < $event['starttime']) {
$start = $event['starttime'];
} else {
$start = $range['start'];
}
$first_dow = gmdate("w", $start);
if ($first_dow == 6) {
$new_time = $start + 86400 * 2;
} else {
if ($first_dow == 0) {
$new_time = $start + 86400;
} else {
$new_time = $start;
}
}
}
} else {
if ($repeats['repeats'] == 3) {
$weekdays = fetch_weekday_structure($event['weekday_start']);
$last_dow = gmdate("w", $last_occurance);
if ($first == true) {
$last_dow = -1;
$start_day = gmdate('w', $last_occurance);
if (in_array($start_day, $weekdays)) {
$next_dow = 0;
}
} else {
foreach ($repeats['days'] as $weekday) {
if ($weekday > $last_dow) {
$next_dow = $weekday;
break;
}
}
}
if (!isset($next_dow)) {
// Fetch first weekday
$first = $repeats['days'][0] * 86400;
$new_time += $first;
// Increase x weeks
$new_time += (7 - $last_dow) * 86400;
$new_time += ($repeats['weeks'] - 1) * 604800;
} else {
// Next day of week exists
if ($last_dow > 0) {
$day_diff = $next_dow - $last_dow;
} else {
$day_diff = $next_dow;
}
$new_time += $day_diff * 86400;
}
} else {
if ($repeats['repeats'] == 4) {
$last_month = gmdate("n", $last_occurance);
$last_year = gmdate("Y", $last_occurance);
$last_day = gmdate("j", $last_occurance);
$last_num_days = gmdate("t", $last_occurance);
// X of every Y months
if ($repeats['day']) {
if ($first == true) {
if ($last_day <= $repeats['day']) {
$new_time = gmmktime(0, 0, 0, $last_month, $repeats['day'], $last_year);
} else {
$new_time = gmmktime(0, 0, 0, $last_month + 1, $repeats['day'], $last_year);
if ($new_time > $event['endtime']) {
return false;
}
}
} else {
$new_time = gmmktime(0, 0, 0, $last_month + $repeats['months'], $repeats['day'], $last_year);
}
} else {
if ($first == true) {
$new_time = fetch_weekday_monthly_repetition($repeats, $last_month, $last_year);
if ($new_time < $last_occurance) {
$new_time = fetch_weekday_monthly_repetition($repeats, $last_month + 1, $last_year);
}
} else {
$new_time = fetch_weekday_monthly_repetition($repeats, $last_month + $repeats['months'], $last_year);
}
}
} else {
if ($repeats['repeats'] == 5) {
$last_year = gmdate("Y", $last_occurance);
// Repeats on (day) of (month) every (years)
if ($repeats['day']) {
if ($first == true) {
$new_time = gmmktime(0, 0, 0, $repeats['month'], $repeats['day'], $last_year);
if ($new_time < $last_occurance) {
$new_time = gmmktime(0, 0, 0, $repeats['month'], $repeats['day'], $last_year + 1);
}
} else {
$new_time = gmmktime(0, 0, 0, $repeats['month'], $repeats['day'], $last_year + $repeats['years']);
}
} else {
if ($first == true) {
$new_time = fetch_weekday_monthly_repetition($repeats, $repeats['month'], $last_year);
if ($new_time < $last_occurance) {
$new_time = fetch_weekday_monthly_repetition($repeats, $repeats['month'], $last_year + 1);
}
} else {
$new_time = fetch_weekday_monthly_repetition($repeats, $repeats['month'], $last_year + $repeats['years']);
}
}
}
}
}
}
}
}
return $new_time;
}
$year = my_date("Y");
}
// Then the month
if ($mybb->input['month'] >= 1 && $mybb->input['month'] <= 12) {
$month = intval($mybb->input['month']);
} else {
$month = my_date("n");
}
add_breadcrumb(htmlspecialchars_uni($calendar['name']), get_calendar_link($calendar['cid']));
add_breadcrumb("{$monthnames[$month]} {$year}", get_calendar_link($calendar['cid'], $year, $month));
$next_month = get_next_month($month, $year);
$prev_month = get_prev_month($month, $year);
$prev_link = get_calendar_link($calendar['cid'], $prev_month['year'], $prev_month['month']);
$next_link = get_calendar_link($calendar['cid'], $next_month['year'], $next_month['month']);
// Start constructing the calendar
$weekdays = fetch_weekday_structure($calendar['startofweek']);
$month_start_weekday = gmdate("w", gmmktime(0, 0, 0, $month, $calendar['startofweek'] + 1, $year));
$prev_month_days = gmdate("t", gmmktime(0, 0, 0, $prev_month['month'], 1, $prev_month['year']));
// This is if we have days in the previous month to show
if ($month_start_weekday != $weekdays[0] || $calendar['startofweek'] != 0) {
$prev_days = $day = gmdate("t", gmmktime(0, 0, 0, $prev_month['month'], 1, $prev_month['year']));
$day -= array_search($month_start_weekday, $weekdays);
$day += $calendar['startofweek'] + 1;
if ($day > $prev_month_days + 1) {
// Go one week back
$day -= 7;
}
$calendar_month = $prev_month['month'];
$calendar_year = $prev_month['year'];
} else {
$day = $calendar['startofweek'] + 1;
