function setEventDate($start_date, $recurrence){
$timestamp = strtotime($start_date);
$day = date('w', $timestamp);
//If the 'start date' is one of the set days
if(in_array(($day+1), explode(',',$recurrence))){
return $start_date;
}
//else: (we need to change start date to first occurrence of one of the set days)
$new_date = getTheNextAppointment($start_date, $recurrence);
return $new_date;
}
/**
* __increment()
* returns the next valid date for an event based on the
* current day,month,year,freq and type
* @private
* @returns string YYYY-MM-DD
*/
function &__increment($d, $m, $y, $f, $t)
{
if ($t == REPEAT_EVERY_DAY) {
return date('Y-m-d', mktime(0, 0, 0, $m, $d + $f, $y));
} elseif ($t == REPEAT_EVERY_WORK_DAY) {
// a workday is defined as Mon,Tue,Wed,Thu,Fri
// repeating on every or Nth work day means to not include
// weekends (Sat/Sun) in the increment... tricky
// ugh, a day-by-day loop seems necessary here, something where
// we can check to see if the day is a Sat/Sun and increment
// the frequency count so as to ignore the weekend. hmmmm....
$orig_freq = $f;
for ($daycount = 1; $daycount <= $orig_freq; $daycount++) {
$nextWorkDOW = date('w', mktime(0, 0, 0, $m, $d + $daycount, $y));
if (is_weekend_day($nextWorkDOW)) {
$f++;
}
}
// and finally make sure we haven't landed on a end week days
// adjust as necessary
$nextWorkDOW = date('w', mktime(0, 0, 0, $m, $d + $f, $y));
if (count($GLOBALS['weekend_days']) === 2) {
if ($nextWorkDOW == $GLOBALS['weekend_days'][0]) {
$f += 2;
} elseif ($nextWorkDOW == $GLOBALS['weekend_days'][1]) {
$f++;
}
} elseif (count($GLOBALS['weekend_days']) === 1 && $nextWorkDOW === $GLOBALS['weekend_days'][0]) {
$f++;
}
return date('Y-m-d', mktime(0, 0, 0, $m, $d + $f, $y));
} elseif ($t == REPEAT_EVERY_WEEK) {
return date('Y-m-d', mktime(0, 0, 0, $m, $d + 7 * $f, $y));
} elseif ($t == REPEAT_EVERY_MONTH) {
return date('Y-m-d', mktime(0, 0, 0, $m + $f, $d, $y));
} elseif ($t == REPEAT_EVERY_YEAR) {
return date('Y-m-d', mktime(0, 0, 0, $m, $d, $y + $f));
} elseif ($t == REPEAT_DAYS_EVERY_WEEK) {
$old_appointment_date = date('Y-m-d', mktime(0, 0, 0, $m, $d, $y));
$next_appointment_date = getTheNextAppointment($old_appointment_date, $f);
return $next_appointment_date;
}
}
