<?php

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/**

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* The cron task class.

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*

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* @since 1.1.3

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* @package LiteSpeed

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*/

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namespace LiteSpeed;

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defined( 'WPINC' ) || exit();

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/**

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* Schedules and runs LiteSpeed Cache background tasks.

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*/

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class Task extends Root {

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/**

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* Tag for debug logs.

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*

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* @var string

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*/

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const LOG_TAG = '⏰';

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/**

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* Map of option id => cron hook registration.

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*

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* @var array<string,array{name:string,hook:callable|string}>

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*/

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private static $_triggers = [

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Base::O_IMG_OPTM_CRON => [

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'name' => 'litespeed_task_imgoptm_pull',

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'hook' => 'LiteSpeed\Img_Optm::start_async_cron',

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], // always fetch immediately

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Base::O_OPTM_CSS_ASYNC => [

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'name' => 'litespeed_task_ccss',

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'hook' => 'LiteSpeed\CSS::cron_ccss',

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],

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Base::O_OPTM_UCSS => [

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'name' => 'litespeed_task_ucss',

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'hook' => 'LiteSpeed\UCSS::cron',

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],

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Base::O_MEDIA_VPI_CRON => [

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'name' => 'litespeed_task_vpi',

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'hook' => 'LiteSpeed\VPI::cron',

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],

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Base::O_MEDIA_PLACEHOLDER_RESP_ASYNC => [

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'name' => 'litespeed_task_lqip',

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'hook' => 'LiteSpeed\Placeholder::cron',

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],

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Base::O_DISCUSS_AVATAR_CRON => [

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'name' => 'litespeed_task_avatar',

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'hook' => 'LiteSpeed\Avatar::cron',

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],

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Base::O_IMG_OPTM_AUTO => [

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'name' => 'litespeed_task_imgoptm_req',

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'hook' => 'LiteSpeed\Img_Optm::cron_auto_request',

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],

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Base::O_GUEST => [

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'name' => 'litespeed_task_guest_sync',

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'hook' => 'LiteSpeed\Guest::cron',

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], // Daily sync Guest Mode IP/UA lists

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Base::O_CRAWLER => [

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'name' => 'litespeed_task_crawler',

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'hook' => 'LiteSpeed\Crawler::start_async_cron',

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], // Set crawler to last one to use above results

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];

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/**

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* Options allowed to run for guest optimization.

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*

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* @var array<int,string>

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*/

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private static $_guest_options = [ Base::O_OPTM_CSS_ASYNC, Base::O_OPTM_UCSS, Base::O_MEDIA_VPI ];

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/**

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* Schedule id for crawler.

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*

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* @var string

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*/

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const FILTER_CRAWLER = 'litespeed_crawl_filter';

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/**

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* Schedule id for general tasks.

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*

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* @var string

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*/

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const FILTER = 'litespeed_filter';

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/**

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* Keep all tasks in cron.

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*

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* @since 3.0

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* @access public

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* @return void

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*/

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public function init() {

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self::debug2( 'Init' );

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add_filter( 'cron_schedules', [ $this, 'lscache_cron_filter' ] );

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$guest_optm = $this->conf( Base::O_GUEST ) && $this->conf( Base::O_GUEST_OPTM );

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foreach ( self::$_triggers as $id => $trigger ) {

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if ( Base::O_IMG_OPTM_CRON === $id ) {

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if ( ! Img_Optm::need_pull() ) {

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continue;

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}

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} elseif ( ! $this->conf( $id ) ) {

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if ( ! $guest_optm || ! in_array( $id, self::$_guest_options, true ) ) {

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continue;

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}

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}

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// Special check for crawler.

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if ( Base::O_CRAWLER === $id ) {

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if ( ! Router::can_crawl() ) {

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continue;

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}

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add_filter( 'cron_schedules', [ $this, 'lscache_cron_filter_crawler' ] ); // phpcs:ignore WordPress.WP.CronInterval.ChangeDetected

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}

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if ( ! wp_next_scheduled( $trigger['name'] ) ) {

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self::debug( 'Cron hook register [name] ' . $trigger['name'] );

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// Determine schedule: crawler uses its own, guest uses daily, others use 15min

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if ( Base::O_CRAWLER === $id ) {

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$schedule = self::FILTER_CRAWLER;

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} elseif ( Base::O_GUEST === $id ) {

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$schedule = 'daily';

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} else {

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$schedule = self::FILTER;

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}

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wp_schedule_event( time(), $schedule, $trigger['name'] );

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}

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add_action( $trigger['name'], $trigger['hook'] );

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}

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}

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/**

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* Handle all async noabort requests.

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*

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* @since 5.5

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* @return void

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*/

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public static function async_litespeed_handler() {

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$hash_data = self::get_option( 'async_call-hash', [] );

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if ( ! $hash_data || ! is_array( $hash_data ) || empty( $hash_data['hash'] ) || empty( $hash_data['ts'] ) ) {

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self::debug( 'async_litespeed_handler no hash data', $hash_data );

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return;

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}

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$nonce = isset( $_GET['nonce'] ) ? sanitize_text_field( wp_unslash( $_GET['nonce'] ) ) : ''; // phpcs:ignore WordPress.Security.NonceVerification.Recommended

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if ( 120 < time() - (int) $hash_data['ts'] || '' === $nonce || $nonce !== $hash_data['hash'] ) {

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self::debug( 'async_litespeed_handler nonce mismatch' );

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return;

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}

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self::delete_option( 'async_call-hash' );

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$type = Router::verify_type();

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self::debug( 'type=' . $type );

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// Don't lock up other requests while processing.

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session_write_close();

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switch ( $type ) {

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case 'crawler':

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Crawler::async_handler();

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break;

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case 'crawler_force':

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Crawler::async_handler( true );

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break;

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case 'imgoptm':

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Img_Optm::async_handler();

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break;

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case 'imgoptm_force':

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Img_Optm::async_handler( true );

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break;

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default:

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break;

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}

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}

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/**

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* Async caller wrapper func.

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*

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* @since 5.5

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*

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* @param string $type Async operation type.

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* @return void

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*/

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public static function async_call( $type ) {

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$hash = Str::rrand( 32 );

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self::update_option(

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'async_call-hash',

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[

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'hash' => $hash,

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'ts' => time(),

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]

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);

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$args = [

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'timeout' => 0.01,

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'blocking' => false,

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'sslverify' => false,

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// 'cookies' => $_COOKIE,

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];

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$qs = [

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'action' => 'async_litespeed',

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'nonce' => $hash,

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Router::TYPE => $type,

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];

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$url = add_query_arg( $qs, admin_url( 'admin-ajax.php' ) );

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self::debug( 'async call to ' . $url );

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wp_safe_remote_post( esc_url_raw( $url ), $args );

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}

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/**

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* Clean all potential existing crons.

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*

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* @since 3.0

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* @access public

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* @return void

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*/

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public static function destroy() {

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Utility::compatibility();

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array_map( 'wp_clear_scheduled_hook', array_column( self::$_triggers, 'name' ) );

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}

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/**

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* Try to clean the crons if disabled.

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*

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* @since 3.0

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* @access public

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*

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* @param string $id Option id of cron trigger.

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* @return void

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*/

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public function try_clean( $id ) {

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if ( $id && ! empty( self::$_triggers[ $id ] ) ) {

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if ( ! $this->conf( $id ) || ( Base::O_CRAWLER === $id && ! Router::can_crawl() ) ) {

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self::debug( 'Cron clear [id] ' . $id . ' [hook] ' . self::$_triggers[ $id ]['name'] );

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wp_clear_scheduled_hook( self::$_triggers[ $id ]['name'] );

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}

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return;

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}

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self::debug( '❌ Unknown cron [id] ' . $id );

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}

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/**

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* Register cron interval for general tasks.

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*

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* @since 1.6.1

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* @access public

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*

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* @param array $schedules Existing schedules.

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* @return array

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*/

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public function lscache_cron_filter( $schedules ) {

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if ( ! array_key_exists( self::FILTER, $schedules ) ) {

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$schedules[ self::FILTER ] = [

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'interval' => 900,

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'display' => __( 'Every 15 Minutes', 'litespeed-cache' ),

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];

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}

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return $schedules;

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}

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/**

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* Register cron interval for crawler.

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*

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* @since 1.1.0

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* @access public

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*

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* @param array $schedules Existing schedules.

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* @return array

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*/

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public function lscache_cron_filter_crawler( $schedules ) {

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$crawler_run_interval = defined( 'LITESPEED_CRAWLER_RUN_INTERVAL' ) ? (int) constant( 'LITESPEED_CRAWLER_RUN_INTERVAL' ) : 600;

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if ( ! array_key_exists( self::FILTER_CRAWLER, $schedules ) ) {

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$schedules[ self::FILTER_CRAWLER ] = [

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'interval' => $crawler_run_interval,

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'display' => __( 'LiteSpeed Crawler Cron', 'litespeed-cache' ),

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];

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}

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return $schedules;

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}

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}

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