<?php

class CronExpression_MonthField extends CronExpression_AbstractField
{
    public function isSatisfiedBy(DateTime $date, $value)
    {
        $value = str_ireplace(array('JAN', 'FEB', 'MAR', 'APR', 'MAY', 'JUN', 'JUL', 'AUG', 'SEP', 'OCT', 'NOV', 'DEC'), range(1, 12), $value);
        return $this->isSatisfied($date->format('m'), $value);
    }
    public function increment(DateTime $date, $invert = false)
    {
        if ($invert) {
            $date->modify('previous month');
            $date->modify($date->format('Y-m-t'));
            $date->setTime(23, 59);
        } else {
            $date->modify('next month');
            $date->modify($date->format('Y-m-01'));
            $date->setTime(0, 0);
        }
        return $this;
    }
    public function validate($value)
    {
        return (bool) preg_match('/[\\*,\\/\\-0-9A-Z]+/', $value);
    }
}