1<?php
2
3namespace Cron;
4use DateTime;
5use DateTimeZone;
6
7
8/**
9 * Hours field.  Allows: * , / -
10 */
11class HoursField extends AbstractField
12{
13    public function isSatisfiedBy(DateTime $date, $value)
14    {
15        return $this->isSatisfied($date->format('H'), $value);
16    }
17
18    public function increment(DateTime $date, $invert = false, $parts = null)
19    {
20        // Change timezone to UTC temporarily. This will
21        // allow us to go back or forwards and hour even
22        // if DST will be changed between the hours.
23        if (is_null($parts) || $parts == '*') {
24            $timezone = $date->getTimezone();
25            $date->setTimezone(new DateTimeZone('UTC'));
26            if ($invert) {
27                $date->modify('-1 hour');
28            } else {
29                $date->modify('+1 hour');
30            }
31            $date->setTimezone($timezone);
32
33            $date->setTime($date->format('H'), $invert ? 59 : 0);
34            return $this;
35        }
36
37        $parts = strpos($parts, ',') !== false ? explode(',', $parts) : array($parts);
38        $hours = array();
39        foreach ($parts as $part) {
40            $hours = array_merge($hours, $this->getRangeForExpression($part, 23));
41        }
42
43        $current_hour = $date->format('H');
44        $position = $invert ? count($hours) - 1 : 0;
45        if (count($hours) > 1) {
46            for ($i = 0; $i < count($hours) - 1; $i++) {
47                if ((!$invert && $current_hour >= $hours[$i] && $current_hour < $hours[$i + 1]) ||
48                    ($invert && $current_hour > $hours[$i] && $current_hour <= $hours[$i + 1])) {
49                    $position = $invert ? $i : $i + 1;
50                    break;
51                }
52            }
53        }
54
55        $hour = $hours[$position];
56        if ((!$invert && $date->format('H') >= $hour) || ($invert && $date->format('H') <= $hour)) {
57            $date->modify(($invert ? '-' : '+') . '1 day');
58            $date->setTime($invert ? 23 : 0, $invert ? 59 : 0);
59        }
60        else {
61            $date->setTime($hour, $invert ? 59 : 0);
62        }
63
64        return $this;
65    }
66
67    public function validate($value)
68    {
69        return (bool) preg_match('/^[\*,\/\-0-9]+$/', $value);
70    }
71}
72