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<?php
/**
* Matomo - free/libre analytics platform
*
* @link https://matomo.org
* @license http://www.gnu.org/licenses/gpl-3.0.html GPL v3 or later
*
*/
namespace Piwik\Scheduler\Schedule;
use Exception;
use Piwik\Date;
/**
* Describes the interval on which a scheduled task is executed. Use the {@link factory()} method
* to create Schedule instances.
*
* @see \Piwik\Scheduler\Task
*/
abstract class Schedule
{
const PERIOD_NEVER = 'never';
const PERIOD_DAY = 'day';
const PERIOD_WEEK = 'week';
const PERIOD_MONTH = 'month';
const PERIOD_HOUR = 'hour';
const PERIOD_YEAR = 'year';
const PERIOD_RANGE = 'range';
/**
* @link http://php.net/manual/en/function.date.php, format string : 'G'
* Defaults to midnight
* @var integer
*/
protected $hour = 0;
/**
* For weekly scheduling : http://php.net/manual/en/function.date.php, format string : 'N', defaults to Monday
* For monthly scheduling : day of the month (1 to 31) (note: will be capped at the latest day available the
* month), defaults to first day of the month
* @var integer
*/
protected $day = 1;
protected $timezone = null;
/**
* @param $period
* @return Daily|Monthly|Weekly
* @throws \Exception
* @ignore
*/
public static function getScheduledTimeForPeriod($period)
{
switch ($period) {
case self::PERIOD_MONTH:
return new \Piwik\Scheduler\Schedule\Monthly();
case self::PERIOD_WEEK:
return new \Piwik\Scheduler\Schedule\Weekly();
case self::PERIOD_DAY:
return new \Piwik\Scheduler\Schedule\Daily();
case self::PERIOD_HOUR:
return new \Piwik\Scheduler\Schedule\Hourly();
default:
throw new Exception('period ' . $period . 'is undefined.');
}
}
/**
* Returns the system time used by subclasses to compute schedulings.
* This method has been introduced so unit tests can override the current system time.
* @return int
*/
protected function getTime()
{
return time();
}
/**
* Computes the next scheduled time based on the system time at which the method has been called and
* the underlying scheduling interval.
*
* @abstract
* @return integer Returns the rescheduled time measured in the number of seconds since the Unix Epoch
* @ignore
*/
public abstract function getRescheduledTime();
/**
* Sets the day of the period to execute the scheduled task. Not a valid operation for all period types.
*
* @abstract
* @param int $_day a number describing the day to set. Its meaning depends on the Schedule's period type.
* @throws Exception if method not supported by subclass or parameter _day is invalid
*/
public abstract function setDay($_day);
/**
* Sets the hour of the day on which the task should be executed.
*
* @param int $hour Must be `>= 0` and `< 24`.
* @throws Exception If the current scheduled period is **hourly** or if `$hour` is invalid.
* @api
*/
public function setHour($hour)
{
if (!($hour >= 0 && $hour < 24)) {
throw new Exception("Invalid hour parameter, must be >=0 and < 24");
}
$this->hour = $hour;
}
/**
* By setting a timezone you make sure the scheduled task will be run at the requested time in the
* given timezone. This is useful for instance in case you want to make sure a task runs at midnight in a website's
* timezone.
*
* @param string $timezone
*/
public function setTimezone($timezone)
{
$this->timezone = $timezone;
}
protected function adjustTimezone($rescheduledTime)
{
if (is_null($this->timezone)) {
return $rescheduledTime;
}
$arbitraryDateInUTC = Date::factory('2011-01-01');
$dateInTimezone = Date::factory('2011-01-01', $this->timezone);
$midnightInTimezone = date('H', $dateInTimezone->getTimestamp());
if ($arbitraryDateInUTC->isEarlier($dateInTimezone)) {
$hoursDifference = 0 - $midnightInTimezone;
} else {
$hoursDifference = 24 - $midnightInTimezone;
}
$hoursDifference = $hoursDifference % 24;
$rescheduledTime += 3600 * $hoursDifference;
if ($this->getTime() > $rescheduledTime) {
// make sure the rescheduled date is in the future
$rescheduledTime = 24 * 3600 + $rescheduledTime;
}
return $rescheduledTime;
}
/**
* Computes the delta in seconds needed to adjust the rescheduled time to the required hour.
*
* @param int $rescheduledTime The rescheduled time to be adjusted
* @return int adjusted rescheduled time
*/
protected function adjustHour($rescheduledTime)
{
if ($this->hour !== null) {
// Reset the number of minutes and set the scheduled hour to the one specified with setHour()
$rescheduledTime = mktime($this->hour, 0, date('s', $rescheduledTime), date('n', $rescheduledTime), date('j', $rescheduledTime), date('Y', $rescheduledTime));
}
return $rescheduledTime;
}
/**
* Returns a new Schedule instance using a string description of the scheduled period type
* and a string description of the day within the period to execute the task on.
*
* @param string $periodType The scheduled period type. Can be `'hourly'`, `'daily'`, `'weekly'`, or `'monthly'`.
* @param bool|false|int|string $periodDay A string describing the day within the scheduled period to execute
* the task on. Only valid for week and month periods.
*
* If `'weekly'` is supplied for `$periodType`, this should be a day
* of the week, for example, `'monday'` or `'tuesday'`.
*
* If `'monthly'` is supplied for `$periodType`, this can be a numeric
* day in the month or a day in one week of the month. For example,
* `12`, `23`, `'first sunday'` or `'fourth tuesday'`.
* @return Hourly|Daily|Weekly|Monthly
* @throws Exception
* @api
*/
public static function factory($periodType, $periodDay = false)
{
switch ($periodType) {
case 'hourly':
return new \Piwik\Scheduler\Schedule\Hourly();
case 'daily':
return new \Piwik\Scheduler\Schedule\Daily();
case 'weekly':
$result = new \Piwik\Scheduler\Schedule\Weekly();
if ($periodDay !== false) {
$result->setDay($periodDay);
}
return $result;
case 'monthly':
$result = new \Piwik\Scheduler\Schedule\Monthly($periodDay);
if ($periodDay !== false) {
if (is_int($periodDay)) {
$result->setDay($periodDay);
} else {
$result->setDayOfWeekFromString($periodDay);
}
}
return $result;
default:
throw new Exception("Unsupported scheduled period type: '{$periodType}'. Supported values are" . " 'hourly', 'daily', 'weekly' or 'monthly'.");
}
}
}