mirror of
https://github.com/wavelog/wavelog.git
synced 2026-03-22 02:14:13 +00:00
452 lines
12 KiB
PHP
452 lines
12 KiB
PHP
<?php if (!defined('BASEPATH')) exit('No direct script access allowed');
|
|
|
|
/**
|
|
* Cron expression parser and validator
|
|
*
|
|
* @author René Pollesch
|
|
* edited by HB9HIL 04/2024
|
|
*
|
|
* Source: https://github.com/poliander/cron
|
|
* Lic: GnuGPL 3
|
|
*/
|
|
class CronExpression {
|
|
/**
|
|
* Weekday name look-up table
|
|
*/
|
|
private const WEEKDAY_NAMES = [
|
|
'sun' => 0,
|
|
'mon' => 1,
|
|
'tue' => 2,
|
|
'wed' => 3,
|
|
'thu' => 4,
|
|
'fri' => 5,
|
|
'sat' => 6
|
|
];
|
|
|
|
/**
|
|
* Month name look-up table
|
|
*/
|
|
private const MONTH_NAMES = [
|
|
'jan' => 1,
|
|
'feb' => 2,
|
|
'mar' => 3,
|
|
'apr' => 4,
|
|
'may' => 5,
|
|
'jun' => 6,
|
|
'jul' => 7,
|
|
'aug' => 8,
|
|
'sep' => 9,
|
|
'oct' => 10,
|
|
'nov' => 11,
|
|
'dec' => 12
|
|
];
|
|
|
|
/**
|
|
* Value boundaries
|
|
*/
|
|
private const VALUE_BOUNDARIES = [
|
|
0 => [
|
|
'min' => 0,
|
|
'max' => 59,
|
|
'mod' => 1
|
|
],
|
|
1 => [
|
|
'min' => 0,
|
|
'max' => 23,
|
|
'mod' => 1
|
|
],
|
|
2 => [
|
|
'min' => 1,
|
|
'max' => 31,
|
|
'mod' => 1
|
|
],
|
|
3 => [
|
|
'min' => 1,
|
|
'max' => 12,
|
|
'mod' => 1
|
|
],
|
|
4 => [
|
|
'min' => 0,
|
|
'max' => 7,
|
|
'mod' => 0
|
|
]
|
|
];
|
|
|
|
/**
|
|
* @expression look-up table
|
|
*/
|
|
private const SPECIAL_EXPRESSIONS = [
|
|
'@yearly' => '0 0 1 1 *',
|
|
'@annually' => '0 0 1 1 *',
|
|
'@monthly' => '0 0 1 * *',
|
|
'@weekly' => '0 0 * * 0',
|
|
'@daily' => '0 0 * * *',
|
|
'@midnight' => '0 0 * * *',
|
|
'@hourly' => '0 * * * *'
|
|
];
|
|
|
|
|
|
/**
|
|
* @var DateTimeZone|null
|
|
*/
|
|
protected readonly ?DateTimeZone $timeZone;
|
|
|
|
/**
|
|
* @var array|null
|
|
*/
|
|
protected readonly ?array $registers;
|
|
|
|
/**
|
|
* @var string
|
|
*/
|
|
protected readonly string $expression;
|
|
|
|
/**
|
|
* @param string $expression a cron expression, e.g. "* * * * *"
|
|
* @param DateTimeZone|null $timeZone time zone objectstring $expression, DateTimeZone $timeZone = null
|
|
*/
|
|
public function __construct($data) {
|
|
$this->timeZone = $data['timeZone'];
|
|
$this->expression = $data['expression'];
|
|
|
|
try {
|
|
$this->registers = $this->parse($data['expression']);
|
|
} catch (Exception $e) {
|
|
$this->registers = null;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Whether current cron expression has been parsed successfully
|
|
*
|
|
* @return bool
|
|
*/
|
|
public function isValid(): bool {
|
|
return null !== $this->registers;
|
|
}
|
|
|
|
/**
|
|
* Match either "now", a given date/time object or a timestamp against current cron expression
|
|
*
|
|
* @param mixed $when a DateTime object, a timestamp (int), or "now" if not set
|
|
* @return bool
|
|
* @throws Exception
|
|
*/
|
|
public function isMatching($when = null): bool {
|
|
if (false === ($when instanceof DateTimeInterface)) {
|
|
$when = (new DateTime())->setTimestamp($when === null ? time() : $when);
|
|
}
|
|
|
|
if ($this->timeZone !== null) {
|
|
$when->setTimezone($this->timeZone);
|
|
}
|
|
|
|
return $this->isValid() && $this->match(sscanf($when->format('i G j n w'), '%d %d %d %d %d'));
|
|
}
|
|
|
|
/**
|
|
* Calculate next matching timestamp
|
|
*
|
|
* @param mixed $start a DateTime object, a timestamp (int) or "now" if not set
|
|
* @return int|bool next matching timestamp, or false on error
|
|
* @throws Exception
|
|
*/
|
|
public function getNext($start = null) {
|
|
if ($this->isValid()) {
|
|
$next = $this->toDateTime($start);
|
|
|
|
do {
|
|
$pos = sscanf($next->format('i G j n Y w'), '%d %d %d %d %d %d');
|
|
} while ($this->increase($next, $pos));
|
|
|
|
return $next->getTimestamp();
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
/**
|
|
* @param mixed $start a DateTime object, a timestamp (int) or "now" if not set
|
|
* @return DateTime
|
|
*/
|
|
private function toDateTime($start): DateTime {
|
|
if ($start instanceof DateTimeInterface) {
|
|
$next = $start;
|
|
} elseif ((int)$start > 0) {
|
|
$next = new DateTime('@' . $start);
|
|
} else {
|
|
$next = new DateTime('@' . time());
|
|
}
|
|
|
|
$next->setTimestamp($next->getTimeStamp() - $next->getTimeStamp() % 60);
|
|
$next->setTimezone($this->timeZone ?: new DateTimeZone(date_default_timezone_get()));
|
|
|
|
if ($this->isMatching($next)) {
|
|
$next->modify('+1 minute');
|
|
}
|
|
|
|
return $next;
|
|
}
|
|
|
|
/**
|
|
* Increases the timestamp in step sizes depending on which segment(s) of the cron pattern are matching.
|
|
* Returns FALSE if the cron pattern is matching and thus no further cycle is required.
|
|
*
|
|
* @param DateTimeInterface $next
|
|
* @param array $pos
|
|
* @return bool
|
|
*/
|
|
private function increase(DateTimeInterface $next, array $pos): bool {
|
|
switch (true) {
|
|
case false === isset($this->registers[3][$pos[3]]):
|
|
// next month, reset day/hour/minute
|
|
$next->setTime(0, 0);
|
|
$next->setDate($pos[4], $pos[3], 1);
|
|
$next->modify('+1 month');
|
|
return true;
|
|
|
|
case false === (isset($this->registers[2][$pos[2]]) && isset($this->registers[4][$pos[5]])):
|
|
// next day, reset hour/minute
|
|
$next->setTime(0, 0);
|
|
$next->modify('+1 day');
|
|
return true;
|
|
|
|
case false === isset($this->registers[1][$pos[1]]):
|
|
// next hour, reset minute
|
|
$next->setTime($pos[1], 0);
|
|
$next->modify('+1 hour');
|
|
return true;
|
|
|
|
case false === isset($this->registers[0][$pos[0]]):
|
|
// next minute
|
|
$next->modify('+1 minute');
|
|
return true;
|
|
|
|
default:
|
|
// all segments are matching
|
|
return false;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* @param array $segments
|
|
* @return bool
|
|
*/
|
|
private function match(array $segments): bool {
|
|
foreach ($this->registers as $i => $item) {
|
|
if (isset($item[(int)$segments[$i]]) === false) {
|
|
return false;
|
|
}
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
/**
|
|
* Parse whole cron expression
|
|
*
|
|
* @param string $expression
|
|
* @return array
|
|
* @throws Exception
|
|
*/
|
|
private function parse(string $expression): array {
|
|
$segments = preg_split('/\s+/', trim($expression));
|
|
|
|
if (is_array($segments) && sizeof($segments) === 5) {
|
|
$registers = array_fill(0, 5, []);
|
|
|
|
foreach ($segments as $index => $segment) {
|
|
$this->parseSegment($registers[$index], $index, $segment);
|
|
}
|
|
|
|
$this->validateDate($registers);
|
|
|
|
if (isset($registers[4][7])) {
|
|
$registers[4][0] = true;
|
|
}
|
|
|
|
return $registers;
|
|
|
|
} else if (strpos($expression, '@') === 0) {
|
|
|
|
$special = trim($expression);
|
|
|
|
if (isset(self::SPECIAL_EXPRESSIONS[$special])) {
|
|
|
|
$special_expression = self::SPECIAL_EXPRESSIONS[$special];
|
|
return $this->parse($special_expression);
|
|
|
|
}
|
|
}
|
|
throw new Exception('invalid number of segments');
|
|
}
|
|
|
|
/**
|
|
* Parse one segment of a cron expression
|
|
*
|
|
* @param array $register
|
|
* @param int $index
|
|
* @param string $segment
|
|
* @throws Exception
|
|
*/
|
|
private function parseSegment(array &$register, int $index, string $segment): void {
|
|
$allowed = [false, false, false, self::MONTH_NAMES, self::WEEKDAY_NAMES];
|
|
|
|
// month names, weekdays
|
|
if ($allowed[$index] !== false && isset($allowed[$index][strtolower($segment)])) {
|
|
// cannot be used together with lists or ranges
|
|
$register[$allowed[$index][strtolower($segment)]] = true;
|
|
} else {
|
|
// split up current segment into single elements, e.g. "1,5-7,*/2" => [ "1", "5-7", "*/2" ]
|
|
foreach (explode(',', $segment) as $element) {
|
|
$this->parseElement($register, $index, $element);
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* @param array $register
|
|
* @param int $index
|
|
* @param string $element
|
|
* @throws Exception
|
|
*/
|
|
private function parseElement(array &$register, int $index, string $element): void {
|
|
$step = 1;
|
|
$segments = explode('/', $element);
|
|
|
|
if (sizeof($segments) > 1) {
|
|
$this->validateStepping($segments, $index);
|
|
|
|
$element = (string)$segments[0];
|
|
$step = (int)$segments[1];
|
|
}
|
|
|
|
if (is_numeric($element)) {
|
|
$this->validateValue($element, $index, $step);
|
|
$register[intval($element)] = true;
|
|
} else {
|
|
$this->parseRange($register, $index, $element, $step);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Parse range of values, e.g. "5-10"
|
|
*
|
|
* @param array $register
|
|
* @param int $index
|
|
* @param string $range
|
|
* @param int $stepping
|
|
* @throws Exception
|
|
*/
|
|
private function parseRange(array &$register, int $index, string $range, int $stepping): void {
|
|
if ($range === '*') {
|
|
$rangeArr = [self::VALUE_BOUNDARIES[$index]['min'], self::VALUE_BOUNDARIES[$index]['max']];
|
|
} else {
|
|
$rangeArr = explode('-', $range);
|
|
}
|
|
|
|
$this->validateRange($rangeArr, $index);
|
|
$this->fillRange($register, $index, $rangeArr, $stepping);
|
|
}
|
|
|
|
/**
|
|
* @param array $register
|
|
* @param int $index
|
|
* @param array $range
|
|
* @param int $stepping
|
|
*/
|
|
private function fillRange(array &$register, int $index, array $range, int $stepping): void {
|
|
$boundary = self::VALUE_BOUNDARIES[$index]['max'] + self::VALUE_BOUNDARIES[$index]['mod'];
|
|
$length = $range[1] - $range[0];
|
|
|
|
for ($i = 0; $i <= $length; $i += $stepping) {
|
|
$register[($range[0] + $i) % $boundary] = true;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Validate whether a given range of values exceeds allowed value boundaries
|
|
*
|
|
* @param array $range
|
|
* @param int $index
|
|
* @throws Exception
|
|
*/
|
|
private function validateRange(array $range, int $index): void {
|
|
if (sizeof($range) !== 2) {
|
|
throw new Exception('invalid range notation');
|
|
}
|
|
|
|
foreach ($range as $value) {
|
|
$this->validateValue($value, $index);
|
|
}
|
|
|
|
if ($range[0] > $range[1]) {
|
|
throw new Exception('lower value in range is larger than upper value');
|
|
}
|
|
}
|
|
|
|
/**
|
|
* @param string $value
|
|
* @param int $index
|
|
* @param int $step
|
|
* @throws Exception
|
|
*/
|
|
private function validateValue(string $value, int $index, int $step = 1): void {
|
|
if (false === ctype_digit($value)) {
|
|
throw new Exception('non-integer value');
|
|
}
|
|
|
|
if (
|
|
intval($value) < self::VALUE_BOUNDARIES[$index]['min'] ||
|
|
intval($value) > self::VALUE_BOUNDARIES[$index]['max']
|
|
) {
|
|
throw new Exception('value out of boundary');
|
|
}
|
|
|
|
if ($step !== 1) {
|
|
throw new Exception('invalid combination of value and stepping notation');
|
|
}
|
|
}
|
|
|
|
/**
|
|
* @param array $segments
|
|
* @param int $index
|
|
* @throws Exception
|
|
*/
|
|
private function validateStepping(array $segments, int $index): void {
|
|
if (sizeof($segments) !== 2) {
|
|
throw new Exception('invalid stepping notation');
|
|
}
|
|
|
|
if ((int)$segments[1] < 1 || (int)$segments[1] > self::VALUE_BOUNDARIES[$index]['max']) {
|
|
throw new Exception('stepping out of allowed range');
|
|
}
|
|
}
|
|
|
|
/**
|
|
* @param array $segments
|
|
* @throws Exception
|
|
*/
|
|
private function validateDate(array $segments): void {
|
|
$year = date('Y');
|
|
|
|
for ($y = 0; $y < 27; $y++) {
|
|
foreach (array_keys($segments[3]) as $month) {
|
|
foreach (array_keys($segments[2]) as $day) {
|
|
if (false === checkdate($month, $day, $year + $y)) {
|
|
continue;
|
|
}
|
|
|
|
if (false === isset($segments[date('w', strtotime(sprintf('%d-%d-%d', $year + $y, $month, $day)))])) {
|
|
continue;
|
|
}
|
|
|
|
return;
|
|
}
|
|
}
|
|
}
|
|
|
|
throw new Exception('no date ever can match the given combination of day/month/weekday');
|
|
}
|
|
}
|