111 lines
3.5 KiB
PHP
111 lines
3.5 KiB
PHP
<?php
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/**
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* Day of month field. Allows: * , / - ? L W
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*
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* 'L' stands for "last" and specifies the last day of the month.
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*
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* The 'W' character is used to specify the weekday (Monday-Friday) nearest the
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* given day. As an example, if you were to specify "15W" as the value for the
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* day-of-month field, the meaning is: "the nearest weekday to the 15th of the
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* month". So if the 15th is a Saturday, the trigger will fire on Friday the
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* 14th. If the 15th is a Sunday, the trigger will fire on Monday the 16th. If
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* the 15th is a Tuesday, then it will fire on Tuesday the 15th. However if you
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* specify "1W" as the value for day-of-month, and the 1st is a Saturday, the
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* trigger will fire on Monday the 3rd, as it will not 'jump' over the boundary
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* of a month's days. The 'W' character can only be specified when the
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* day-of-month is a single day, not a range or list of days.
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*
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* @author Michael Dowling <mtdowling@gmail.com>
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*/
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class CronExpression_DayOfMonthField extends CronExpression_AbstractField
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{
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/**
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* Get the nearest day of the week for a given day in a month
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*
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* @param int $currentYear Current year
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* @param int $currentMonth Current month
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* @param int $targetDay Target day of the month
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*
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* @return DateTime Returns the nearest date
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*/
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private static function getNearestWeekday($currentYear, $currentMonth, $targetDay)
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{
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$tday = str_pad($targetDay, 2, '0', STR_PAD_LEFT);
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$target = new DateTime("$currentYear-$currentMonth-$tday");
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$currentWeekday = (int) $target->format('N');
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if ($currentWeekday < 6) {
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return $target;
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}
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$lastDayOfMonth = $target->format('t');
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foreach (array(-1, 1, -2, 2) as $i) {
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$adjusted = $targetDay + $i;
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if ($adjusted > 0 && $adjusted <= $lastDayOfMonth) {
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$target->setDate($currentYear, $currentMonth, $adjusted);
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if ($target->format('N') < 6 && $target->format('m') == $currentMonth) {
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return $target;
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}
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}
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}
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}
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/**
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* {@inheritdoc}
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*/
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public function isSatisfiedBy(DateTime $date, $value)
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{
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// ? states that the field value is to be skipped
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if ($value == '?') {
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return true;
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}
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$fieldValue = $date->format('d');
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// Check to see if this is the last day of the month
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if ($value == 'L') {
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return $fieldValue == $date->format('t');
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}
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// Check to see if this is the nearest weekday to a particular value
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if (strpos($value, 'W')) {
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// Parse the target day
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$targetDay = substr($value, 0, strpos($value, 'W'));
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// Find out if the current day is the nearest day of the week
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return $date->format('j') == self::getNearestWeekday(
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$date->format('Y'),
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$date->format('m'),
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$targetDay
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)->format('j');
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}
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return $this->isSatisfied($date->format('d'), $value);
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}
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/**
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* {@inheritdoc}
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*/
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public function increment(DateTime $date, $invert = false)
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{
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if ($invert) {
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$date->modify('previous day');
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$date->setTime(23, 59);
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} else {
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$date->modify('next day');
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$date->setTime(0, 0);
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}
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return $this;
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}
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/**
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* {@inheritdoc}
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*/
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public function validate($value)
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{
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return (bool) preg_match('/[\*,\/\-\?LW0-9A-Za-z]+/', $value);
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}
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}
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