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<?php
namespace WP_Rocket\Engine\Cache\PurgeExpired;
use WP_Rocket\Admin\Options_Data;
use WP_Rocket\Event_Management\Subscriber_Interface;
/**
* Event subscriber to clear cached files after lifespan.
*
* @since 3.4
*/
class Subscriber implements Subscriber_Interface {
/**
* Cron name.
*
* @since 3.4
*
* @var string
*/
const EVENT_NAME = 'rocket_purge_time_event';
/**
* WP Rocket Options instance.
*
* @since 3.4
*
* @var Options_Data
*/
private $options;
/**
* Expired Cache Purge instance.
*
* @since 3.4
*
* @var PurgeExpiredCache
*/
private $purge;
/**
* Constructor.
*
* @param Options_Data $options Options instance.
* @param PurgeExpiredCache $purge Purge instance.
*/
public function __construct( Options_Data $options, PurgeExpiredCache $purge ) {
$this->options = $options;
$this->purge = $purge;
}
/**
* {@inheritdoc}
*/
public static function get_subscribed_events() {
return [
'init' => 'schedule_event',
'rocket_deactivation' => 'unschedule_event',
static::EVENT_NAME => 'purge_expired_files',
'cron_schedules' => 'custom_cron_schedule',
'wp_rocket_upgrade' => [ 'update_lifespan_option_on_update', 13, 2 ],
];
}
/**
* Adds a custom cron schedule based on purge lifespan interval.
*
* @since 3.4.3
*
* @param array $schedules An array of non-default cron schedules.
*/
public function custom_cron_schedule( $schedules ) {
$schedules['rocket_expired_cache_cron_interval'] = [
'interval' => $this->get_interval(),
'display' => __( 'WP Rocket Expired Cache Interval', 'rocket' ),
];
return $schedules;
}
/** ----------------------------------------------------------------------------------------- */
/** HOOK CALLBACKS ========================================================================== */
/** ----------------------------------------------------------------------------------------- */
/**
* Scheduling the cron event.
* If the task is not programmed, it is automatically added.
*
* @since 3.4
*/
public function schedule_event() {
if ( $this->get_cache_lifespan() && ! wp_next_scheduled( static::EVENT_NAME ) ) {
$interval = $this->get_interval();
wp_schedule_event( time() + $interval, 'rocket_expired_cache_cron_interval', static::EVENT_NAME );
}
}
/**
* Gets the interval when the scheduled clean cache purge needs to run.
* If Minutes option is selected, then the interval will be set to minutes.
* If Hours / Days options are selected, then it will be set to 1 hour.
*
* @since 3.4.3
*
* @return int $interval Interval time in seconds.
*/
private function get_interval() {
$unit = $this->options->get( 'purge_cron_unit' );
$lifespan = $this->options->get( 'purge_cron_interval', 10 );
$interval = HOUR_IN_SECONDS;
if ( ! $unit || ! defined( $unit ) ) {
$unit = 'HOUR_IN_SECONDS';
}
if ( 'MINUTE_IN_SECONDS' === $unit ) {
$interval = $lifespan * MINUTE_IN_SECONDS;
}
return $interval;
}
/**
* Unschedule the event.
*
* @since 3.4
*/
public function unschedule_event() {
wp_clear_scheduled_hook( static::EVENT_NAME );
}
/**
* Perform the event action.
*
* @since 3.4
*/
public function purge_expired_files() {
$this->purge->purge_expired_files( $this->get_cache_lifespan() );
}
/**
* Get the cache lifespan in seconds.
* If no value is filled in the settings, return 0. It means the purge is disabled.
* If the value from the settings is filled but invalid, fallback to the initial value (10 hours).
*
* @since 3.4
*
* @return int The cache lifespan in seconds.
*/
public function get_cache_lifespan() {
$lifespan = $this->options->get( 'purge_cron_interval' );
if ( ! $lifespan ) {
return 0;
}
$unit = $this->options->get( 'purge_cron_unit' );
if ( $lifespan < 0 || ! $unit || ! defined( $unit ) ) {
return 10 * HOUR_IN_SECONDS;
}
return $lifespan * constant( $unit );
}
/**
* Update lifespan option to remove minutes with WP Rocket Update.
*
* @since 3.8
*
* @param string $new_version New plugin version.
* @param string $old_version Previous plugin version.
*
* @return void
*/
public function update_lifespan_option_on_update( $new_version, $old_version ) {
if ( version_compare( $old_version, '3.8', '>' ) ) {
return;
}
$this->purge->update_lifespan_value(
$this->options->get( 'purge_cron_interval' ),
$this->options->get( 'purge_cron_unit' )
);
}
}
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