125 lines
3.8 KiB
PHP
Executable File
125 lines
3.8 KiB
PHP
Executable File
<?php
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/**
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* Day of week field. Allows: * / , - ? L #
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*
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* Days of the week can be represented as a number 0-7 (0|7 = Sunday)
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* or as a three letter string: SUN, MON, TUE, WED, THU, FRI, SAT.
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*
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* 'L' stands for "last". It allows you to specify constructs such as
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* "the last Friday" of a given month.
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*
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* '#' is allowed for the day-of-week field, and must be followed by a
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* number between one and five. It allows you to specify constructs such as
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* "the second Friday" of a given month.
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*
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* @author Michael Dowling <mtdowling@gmail.com>
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*/
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class CronExpression_DayOfWeekField extends CronExpression_AbstractField
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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, $value)
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{
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if ($value == '?') {
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return true;
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}
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// Convert text day of the week values to integers
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$value = str_ireplace(
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array('SUN', 'MON', 'TUE', 'WED', 'THU', 'FRI', 'SAT'),
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range(0, 6),
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$value
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);
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$currentYear = $date->format('Y');
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$currentMonth = $date->format('m');
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$lastDayOfMonth = $date->format('t');
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// Find out if this is the last specific weekday of the month
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if (strpos($value, 'L')) {
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$weekday = str_replace('7', '0', substr($value, 0, strpos($value, 'L')));
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$tdate = clone $date;
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$tdate->setDate($currentYear, $currentMonth, $lastDayOfMonth);
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while ($tdate->format('w') != $weekday) {
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$tdate->setDate($currentYear, $currentMonth, --$lastDayOfMonth);
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}
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return $date->format('j') == $lastDayOfMonth;
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}
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// Handle # hash tokens
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if (strpos($value, '#')) {
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list($weekday, $nth) = explode('#', $value);
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// Validate the hash fields
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if ($weekday < 1 || $weekday > 5) {
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throw new InvalidArgumentException("Weekday must be a value between 1 and 5. {$weekday} given");
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}
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if ($nth > 5) {
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throw new InvalidArgumentException('There are never more than 5 of a given weekday in a month');
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}
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// The current weekday must match the targeted weekday to proceed
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if ($date->format('N') != $weekday) {
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return false;
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}
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$tdate = clone $date;
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$tdate->setDate($currentYear, $currentMonth, 1);
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$dayCount = 0;
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$currentDay = 1;
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while ($currentDay < $lastDayOfMonth + 1) {
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if ($tdate->format('N') == $weekday) {
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if (++$dayCount >= $nth) {
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break;
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}
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}
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$tdate->setDate($currentYear, $currentMonth, ++$currentDay);
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}
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return $date->format('j') == $currentDay;
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}
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// Handle day of the week values
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if (strpos($value, '-')) {
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$parts = explode('-', $value);
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if ($parts[0] == '7') {
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$parts[0] = '0';
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} elseif ($parts[1] == '0') {
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$parts[1] = '7';
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}
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$value = implode('-', $parts);
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}
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// Test to see which Sunday to use -- 0 == 7 == Sunday
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$format = in_array(7, str_split($value)) ? 'N' : 'w';
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$fieldValue = $date->format($format);
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return $this->isSatisfied($fieldValue, $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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$date->modify('-1 day');
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$date->setTime(23, 59, 0);
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} else {
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$date->modify('+1 day');
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$date->setTime(0, 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('/[\*,\/\-0-9A-Z]+/', $value);
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}
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}
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