<?php
namespace Cron;
if (!defined('ABSPATH')) exit;
use DateTime;
class DayOfMonthField extends AbstractField
{
private static function getNearestWeekday($currentYear, $currentMonth, $targetDay)
{
$tday = str_pad($targetDay, 2, '0', STR_PAD_LEFT);
$target = DateTime::createFromFormat('Y-m-d', "$currentYear-$currentMonth-$tday");
$currentWeekday = (int) $target->format('N');
if ($currentWeekday < 6) {
return $target;
}
$lastDayOfMonth = $target->format('t');
foreach (array(-1, 1, -2, 2) as $i) {
$adjusted = $targetDay + $i;
if ($adjusted > 0 && $adjusted <= $lastDayOfMonth) {
$target->setDate($currentYear, $currentMonth, $adjusted);
if ($target->format('N') < 6 && $target->format('m') == $currentMonth) {
return $target;
}
}
}
}
public function isSatisfiedBy(DateTime $date, $value)
{
// ? states that the field value is to be skipped
if ($value == '?') {
return true;
}
$fieldValue = $date->format('d');
// Check to see if this is the last day of the month
if ($value == 'L') {
return $fieldValue == $date->format('t');
}
// Check to see if this is the nearest weekday to a particular value
if (strpos($value, 'W')) {
// Parse the target day
$targetDay = substr($value, 0, strpos($value, 'W'));
// Find out if the current day is the nearest day of the week
return $date->format('j') == self::getNearestWeekday(
$date->format('Y'),
$date->format('m'),
$targetDay
)->format('j');
}
return $this->isSatisfied($date->format('d'), $value);
}
public function increment(DateTime $date, $invert = false)
{
if ($invert) {
$date->modify('previous day');
$date->setTime(23, 59);
} else {
$date->modify('next day');
$date->setTime(0, 0);
}
return $this;
}
public function validate($value)
{
// Allow wildcards and a single L
if ($value === '?' || $value === '*' || $value === 'L') {
return true;
}
// If you only contain numbers and are within 1-31
if ((bool) preg_match('/^\d{1,2}$/', $value) && ($value >= 1 && $value <= 31)) {
return true;
}
// If you have a -, we will deal with each of your chunks
if ((bool) preg_match('/-/', $value)) {
// We cannot have a range within a list or vice versa
if ((bool) preg_match('/,/', $value)) {
return false;
}
$chunks = explode('-', $value);
foreach ($chunks as $chunk) {
if (!$this->validate($chunk)) {
return false;
}
}
return true;
}
// If you have a comma, we will deal with each value
if ((bool) preg_match('/,/', $value)) {
// We cannot have a range within a list or vice versa
if ((bool) preg_match('/-/', $value)) {
return false;
}
$chunks = explode(',', $value);
foreach ($chunks as $chunk) {
if (!$this->validate($chunk)) {
return false;
}
}
return true;
}
// If you contain a /, we'll deal with it
if ((bool) preg_match('/\//', $value)) {
$chunks = explode('/', $value);
foreach ($chunks as $chunk) {
if (!$this->validate($chunk)) {
return false;
}
}
return true;
}
// If you end in W, make sure that it has a numeric in front of it
if ((bool) preg_match('/^\d{1,2}W$/', $value)) {
return true;
}
return false;
}
}