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LiteSpeed
63.250.38.42

File Name : vpi.cls.php

<?php
/**
 * The viewport image (VPI) class.
 *
 * Handles discovering above-the-fold images for posts/pages and stores the
 * viewport image list per post (desktop & mobile). Coordinates with the
 * remote service via queue + cron + webhook notify.
 *
 * @since   4.7
 * @package LiteSpeed
 */

namespace LiteSpeed;

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

/**
 * Generate and manage ViewPort Images (VPI) for pages.
 */
class VPI extends Base {

/**
	 * Log tag for debug output.
	 *
	 * @var string
	 */
	const LOG_TAG = '[VPI]';

/**
	 * Action types.
	 *
	 * @var string
	 */
	const TYPE_GEN     = 'gen';
	const TYPE_CLEAR_Q = 'clear_q';
	
	/**
	 * VPI Desktop Meta name.
	 * 
	 * @since  7.6
	 * @var string
	 */
	const POST_META = 'litespeed_vpi_list';
	/**
	 * VPI Mobile Meta name.
	 * 
	 * @since  7.6
	 * @var string
	 */
	const POST_META_MOBILE = 'litespeed_vpi_list_mobile';

/**
	 * Summary values persisted between requests (timings, last runs, etc).
	 *
	 * @var array
	 */
	protected $_summary;

/**
	 * In-memory working queue for VPI jobs.
	 *
	 * @var array
	 */
	private $_queue;

/**
	 * Init.
	 *
	 * @since 4.7
	 */
	public function __construct() {
		$this->_summary = self::get_summary();
	}

/**
	 * Queue the current page for VPI generation.
	 *
	 * @since 4.7
	 * @return void
	 */
	public function add_to_queue() {
		$is_mobile = $this->_separate_mobile();

global $wp;
		$request_url = home_url( $wp->request );

if ( ! apply_filters( 'litespeed_vpi_should_queue', true, $request_url ) ) {
			return;
		}

// Sanitize user agent coming from the server superglobal.
		$ua = ! empty( $_SERVER['HTTP_USER_AGENT'] )
			? sanitize_text_field( wp_unslash( $_SERVER['HTTP_USER_AGENT'] ) )
			: '';

// Store it to prepare for cron.
		$this->_queue = $this->load_queue( 'vpi' );

if ( count( $this->_queue ) > 500 ) {
			self::debug( 'Queue is full - 500' );
			return;
		}

$home_id = (int) get_option( 'page_for_posts' );

if ( ! is_singular() && ! ( $home_id > 0 && is_home() ) ) {
			self::debug( 'not single post ID' );
			return;
		}

$post_id = is_home() ? $home_id : get_the_ID();

$queue_k = ( $is_mobile ? 'mobile' : '' ) . ' ' . $request_url;
		if ( ! empty( $this->_queue[ $queue_k ] ) ) {
			self::debug( 'queue k existed ' . $queue_k );
			return;
		}

$this->_queue[ $queue_k ] = [
			'url'        => apply_filters( 'litespeed_vpi_url', $request_url ),
			'post_id'    => $post_id,
			'user_agent' => substr( $ua, 0, 200 ),
			'is_mobile'  => $is_mobile,
		]; // Current UA will be used to request.
		$this->save_queue( 'vpi', $this->_queue );
		self::debug( 'Added queue_vpi [url] ' . $queue_k . ' [UA] ' . $ua );

// Prepare cache tag for later purge.
		Tag::add( 'VPI.' . md5( $queue_k ) );
	}

/**
	 * Handle finish notifications from remote service.
	 *
	 * Expects JSON body; falls back to $_POST for legacy callers.
	 *
	 * @since 4.7
	 * @return array Response object for the cloud layer.
	 */
	public function notify() {
		// phpcs:ignore WordPress.Security.NonceVerification.Missing
		$post_data = \json_decode( file_get_contents( 'php://input' ), true );
		if ( is_null( $post_data ) ) {
			// phpcs:ignore WordPress.Security.NonceVerification.Missing
			$post_data = $_POST;
		}
		self::debug( 'notify() data', $post_data );

$this->_queue = $this->load_queue( 'vpi' );

list( $post_data ) = $this->cls( 'Cloud' )->extract_msg( $post_data, 'vpi' );

$notified_data = $post_data['data'];
		if ( empty( $notified_data ) || ! is_array( $notified_data ) ) {
			self::debug( '❌ notify exit: no notified data' );
			return Cloud::err( 'no notified data' );
		}

// Check if it's in queue or not.
		$valid_i = 0;
		foreach ( $notified_data as $v ) {
			if ( empty( $v['request_url'] ) ) {
				self::debug( '❌ notify bypass: no request_url', $v );
				continue;
			}
			if ( empty( $v['queue_k'] ) ) {
				self::debug( '❌ notify bypass: no queue_k', $v );
				continue;
			}

$queue_k = $v['queue_k'];

if ( empty( $this->_queue[ $queue_k ] ) ) {
				self::debug( '❌ notify bypass: no this queue [q_k]' . $queue_k );
				continue;
			}

// Save data.
			if ( ! empty( $v['data_vpi'] ) ) {
				$post_id   = (int) $this->_queue[ $queue_k ]['post_id'];
				$name      = ! empty( $v['is_mobile'] ) ? self::POST_META_MOBILE : self::POST_META;
				$urldecode = is_array( $v['data_vpi'] ) ? array_map( 'urldecode', $v['data_vpi'] ) : urldecode( $v['data_vpi'] );
				self::debug( 'save data_vpi', $urldecode );
				$this->cls( 'Metabox' )->save( $post_id, $name, $urldecode );

++$valid_i;
			}

unset( $this->_queue[ $queue_k ] );
			self::debug( 'notify data handled, unset queue [q_k] ' . $queue_k );
		}
		$this->save_queue( 'vpi', $this->_queue );

self::debug( 'notified' );

return Cloud::ok( [ 'count' => $valid_i ] );
	}

/**
	 * Cron entry point.
	 *
	 * @since 4.7
	 *
	 * @param bool $do_continue Continue processing multiple queue items within one cron tick.
	 * @return mixed Result of the handler.
	 */
	public static function cron( $do_continue = false ) {
		$_instance = self::cls();
		return $_instance->_cron_handler( $do_continue );
	}

/**
	 * Cron queue processor.
	 *
	 * @since 4.7
	 *
	 * @param bool $do_continue Continue processing multiple queue items within one cron tick.
	 * @return void
	 */
	private function _cron_handler( $do_continue = false ) {
		self::debug( 'cron start' );
		$this->_queue = $this->load_queue( 'vpi' );

if ( empty( $this->_queue ) ) {
			return;
		}

// For cron, need to check request interval too.
		if ( ! $do_continue ) {
			if ( ! empty( $this->_summary['curr_request_vpi'] ) && time() - (int) $this->_summary['curr_request_vpi'] < 300 && ! $this->conf( self::O_DEBUG ) ) {
				self::debug( 'Last request not done' );
				return;
			}
		}

$i = 0;
		foreach ( $this->_queue as $k => $v ) {
			if ( ! empty( $v['_status'] ) ) {
				continue;
			}

self::debug( 'cron job [tag] ' . $k . ' [url] ' . $v['url'] . ( $v['is_mobile'] ? ' 📱 ' : '' ) . ' [UA] ' . $v['user_agent'] );

++$i;
			$res = $this->_send_req( $v['url'], $k, $v['user_agent'], $v['is_mobile'] );
			if ( ! $res ) {
				// Status is wrong, drop this item from queue.
				$this->_queue = $this->load_queue( 'vpi' );
				unset( $this->_queue[ $k ] );
				$this->save_queue( 'vpi', $this->_queue );

if ( ! $do_continue ) {
					return;
				}

GUI::print_loading( count( $this->_queue ), 'VPI' );
				Router::self_redirect( Router::ACTION_VPI, self::TYPE_GEN );
				return;
			}

// Exit queue if out of quota or service is hot.
			if ( 'out_of_quota' === $res || 'svc_hot' === $res ) {
				return;
			}

$this->_queue                  = $this->load_queue( 'vpi' );
			$this->_queue[ $k ]['_status'] = 'requested';
			$this->save_queue( 'vpi', $this->_queue );
			self::debug( 'Saved to queue [k] ' . $k );

// only request first one if not continuing.
			if ( ! $do_continue ) {
				return;
			}

GUI::print_loading( count( $this->_queue ), 'VPI' );
			Router::self_redirect( Router::ACTION_VPI, self::TYPE_GEN );
			return;
		}
	}

/**
	 * Send request to QUIC.cloud API to generate VPI.
	 *
	 * @since 4.7
	 * @access private
	 *
	 * @param string $request_url The URL to analyze for VPI.
	 * @param string $queue_k     Queue key for this job.
	 * @param string $user_agent  Sanitized User-Agent string (<=200 chars).
	 * @param bool   $is_mobile   Whether the job is for mobile viewport.
	 * @return bool|string True on queued successfully, 'out_of_quota'/'svc_hot' on throttling, or false on error.
	 */
	private function _send_req( $request_url, $queue_k, $user_agent, $is_mobile ) {
		$svc = Cloud::SVC_VPI;

// Check if has credit to push or not.
		$err       = false;
		$allowance = $this->cls( 'Cloud' )->allowance( $svc, $err );
		if ( ! $allowance ) {
			self::debug( '❌ No credit: ' . $err );
			$err && Admin_Display::error( Error::msg( $err ) );
			return 'out_of_quota';
		}

set_time_limit( 120 );

// Update request status.
		self::save_summary( [ 'curr_request_vpi' => time() ], true );

// Gather guest HTML to send.
		$html = $this->cls( 'CSS' )->prepare_html( $request_url, $user_agent );

if ( ! $html ) {
			return false;
		}

// Parse HTML to gather CSS content before requesting.
		$css                = false;
		list( $css, $html ) = $this->cls( 'CSS' )->prepare_css( $html );

if ( ! $css ) {
			self::debug( '❌ No css' );
			return false;
		}

$data = [
			'url'        => $request_url,
			'queue_k'    => $queue_k,
			'user_agent' => $user_agent,
			'is_mobile'  => $is_mobile ? 1 : 0, // todo: compatible w/ tablet.
			'html'       => $html,
			'css'        => $css,
		];
		self::debug( 'Generating: ', $data );

$json = Cloud::post( $svc, $data, 30 );
		if ( ! is_array( $json ) ) {
			return $json;
		}

// Unknown status, remove this line.
		if ( 'queued' !== $json['status'] ) {
			return false;
		}

// Save summary data.
		self::reload_summary();
		$this->_summary['last_spent_vpi']   = time() - (int) $this->_summary['curr_request_vpi'];
		$this->_summary['last_request_vpi'] = $this->_summary['curr_request_vpi'];
		$this->_summary['curr_request_vpi'] = 0;
		self::save_summary();

return true;
	}

/**
	 * Handle all request actions from main controller.
	 *
	 * @since 4.7
	 * @return void
	 */
	public function handler() {
		$type = Router::verify_type();

switch ( $type ) {
			case self::TYPE_GEN:
            self::cron( true );
				break;

case self::TYPE_CLEAR_Q:
            $this->clear_q( 'vpi' );
				break;

default:
				break;
		}

Admin::redirect();
	}
}

Name	Type	Size	Owner/Group	Permission	Last Modified	Actions
.	dir	-	zainldgo/zainldgo	0755	2026-05-04 08:21:21
..	dir	-	zainldgo/zainldgo	0755	2026-05-04 08:21:21
cdn	dir	-	zainldgo/zainldgo	0755	2026-05-04 08:21:21
data_structure	dir	-	zainldgo/zainldgo	0755	2026-05-04 08:21:21
activation.cls.php	text/x-php	17.31 KB	zainldgo/zainldgo	0644	2026-05-04 08:21:21
admin-display.cls.php	text/x-php	48.47 KB	zainldgo/zainldgo	0644	2026-05-04 08:21:21
admin-settings.cls.php	text/x-php	11.12 KB	zainldgo/zainldgo	0644	2026-05-04 08:21:21
admin.cls.php	text/x-php	6.13 KB	zainldgo/zainldgo	0644	2026-05-04 08:21:21
api.cls.php	text/x-php	10.36 KB	zainldgo/zainldgo	0644	2026-05-04 08:21:21
avatar.cls.php	text/x-php	8.65 KB	zainldgo/zainldgo	0644	2026-05-04 08:21:21
base.cls.php	text/x-php	37.66 KB	zainldgo/zainldgo	0644	2026-05-04 08:21:21
cdn.cls.php	text/x-php	15.92 KB	zainldgo/zainldgo	0644	2026-05-04 08:21:21
cloud-auth-callback.trait.php	text/x-php	10.43 KB	zainldgo/zainldgo	0644	2026-05-04 08:21:21
cloud-auth-ip.trait.php	text/x-php	4.33 KB	zainldgo/zainldgo	0644	2026-05-04 08:21:21
cloud-auth.trait.php	text/x-php	9.38 KB	zainldgo/zainldgo	0644	2026-05-04 08:21:21
cloud-misc.trait.php	text/x-php	10.32 KB	zainldgo/zainldgo	0644	2026-05-04 08:21:21
cloud-node.trait.php	text/x-php	5.95 KB	zainldgo/zainldgo	0644	2026-05-04 08:21:21
cloud-request.trait.php	text/x-php	19.68 KB	zainldgo/zainldgo	0644	2026-05-04 08:21:21
cloud.cls.php	text/x-php	7.32 KB	zainldgo/zainldgo	0644	2026-05-04 08:21:21
conf.cls.php	text/x-php	19.53 KB	zainldgo/zainldgo	0644	2026-05-04 08:21:21
control.cls.php	text/x-php	24.35 KB	zainldgo/zainldgo	0644	2026-05-04 08:21:21
core.cls.php	text/x-php	20.97 KB	zainldgo/zainldgo	0644	2026-05-04 08:21:21
crawler-map.cls.php	text/x-php	19.41 KB	zainldgo/zainldgo	0644	2026-05-04 08:21:21
crawler.cls.php	text/x-php	44.72 KB	zainldgo/zainldgo	0644	2026-05-04 08:21:21
css.cls.php	text/x-php	17.77 KB	zainldgo/zainldgo	0644	2026-05-04 08:21:21
data.cls.php	text/x-php	22.21 KB	zainldgo/zainldgo	0644	2026-05-04 08:21:21
data.upgrade.func.php	text/x-php	5.72 KB	zainldgo/zainldgo	0644	2026-05-04 08:21:21
db-optm.cls.php	text/x-php	15.35 KB	zainldgo/zainldgo	0644	2026-05-04 08:21:21
debug2.cls.php	text/x-php	18.4 KB	zainldgo/zainldgo	0644	2026-05-04 08:21:21
doc.cls.php	text/x-php	5.45 KB	zainldgo/zainldgo	0644	2026-05-04 08:21:21
error.cls.php	text/x-php	7.35 KB	zainldgo/zainldgo	0644	2026-05-04 08:21:21
esi.cls.php	text/x-php	27.18 KB	zainldgo/zainldgo	0644	2026-05-04 08:21:21
file.cls.php	text/x-php	10.57 KB	zainldgo/zainldgo	0644	2026-05-04 08:21:21
guest.cls.php	text/x-php	2.75 KB	zainldgo/zainldgo	0644	2026-05-04 08:21:21
gui.cls.php	text/x-php	36.57 KB	zainldgo/zainldgo	0644	2026-05-04 08:21:21
health.cls.php	text/x-php	2.83 KB	zainldgo/zainldgo	0644	2026-05-04 08:21:21
htaccess.cls.php	text/x-php	29.81 KB	zainldgo/zainldgo	0644	2026-05-04 08:21:21
img-optm-manage.trait.php	text/x-php	30.85 KB	zainldgo/zainldgo	0644	2026-05-04 08:21:21
img-optm-pull.trait.php	text/x-php	22.1 KB	zainldgo/zainldgo	0644	2026-05-04 08:21:21
img-optm-send.trait.php	text/x-php	21.9 KB	zainldgo/zainldgo	0644	2026-05-04 08:21:21
img-optm.cls.php	text/x-php	5.26 KB	zainldgo/zainldgo	0644	2026-05-04 08:21:21
import.cls.php	text/x-php	4.29 KB	zainldgo/zainldgo	0644	2026-05-04 08:21:21
import.preset.cls.php	text/x-php	5.5 KB	zainldgo/zainldgo	0644	2026-05-04 08:21:21
lang.cls.php	text/x-php	17.02 KB	zainldgo/zainldgo	0644	2026-05-04 08:21:21
localization.cls.php	text/x-php	4.03 KB	zainldgo/zainldgo	0644	2026-05-04 08:21:21
media.cls.php	text/x-php	44.08 KB	zainldgo/zainldgo	0644	2026-05-04 08:21:21
metabox.cls.php	text/x-php	5.29 KB	zainldgo/zainldgo	0644	2026-05-04 08:21:21
object-cache-wp.cls.php	text/x-php	18.82 KB	zainldgo/zainldgo	0644	2026-05-04 08:21:21
object-cache.cls.php	text/x-php	20.95 KB	zainldgo/zainldgo	0644	2026-05-04 08:21:21
object.lib.php	text/x-php	14.16 KB	zainldgo/zainldgo	0644	2026-05-04 08:21:21
optimize.cls.php	text/x-php	38.64 KB	zainldgo/zainldgo	0644	2026-05-04 08:21:21
optimizer.cls.php	text/x-php	10.5 KB	zainldgo/zainldgo	0644	2026-05-04 08:21:21
placeholder.cls.php	text/x-php	17.93 KB	zainldgo/zainldgo	0644	2026-05-04 08:21:21
purge.cls.php	text/x-php	34.41 KB	zainldgo/zainldgo	0644	2026-05-04 08:21:21
report.cls.php	text/x-php	6.12 KB	zainldgo/zainldgo	0644	2026-05-04 08:21:21
rest.cls.php	text/x-php	9.08 KB	zainldgo/zainldgo	0644	2026-05-04 08:21:21
root.cls.php	text/x-php	14.29 KB	zainldgo/zainldgo	0644	2026-05-04 08:21:21
router.cls.php	text/x-php	20.76 KB	zainldgo/zainldgo	0644	2026-05-04 08:21:21
str.cls.php	text/x-php	3.08 KB	zainldgo/zainldgo	0644	2026-05-04 08:21:21
tag.cls.php	text/x-php	9.26 KB	zainldgo/zainldgo	0644	2026-05-04 08:21:21
task.cls.php	text/x-php	7.05 KB	zainldgo/zainldgo	0644	2026-05-04 08:21:21
tool.cls.php	text/x-php	4.17 KB	zainldgo/zainldgo	0644	2026-05-04 08:21:21
ucss.cls.php	text/x-php	16.35 KB	zainldgo/zainldgo	0644	2026-05-04 08:21:21
utility.cls.php	text/x-php	26.01 KB	zainldgo/zainldgo	0644	2026-05-04 08:21:21
vary.cls.php	text/x-php	21.33 KB	zainldgo/zainldgo	0644	2026-05-04 08:21:21
vpi.cls.php	text/x-php	9.38 KB	zainldgo/zainldgo	0644	2026-05-04 08:21:21

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