JezK

Edit File: 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 svc via queue + cron. * * @since 4.7 * @package LiteSpeed */ namespace LiteSpeed; defined( 'WPINC' ) || exit(); /** * Generate and manage ViewPort Images (VPI) for pages. */ class VPI extends Cloud_Queue_Svc { /** * Log tag for debug output. * * @var string */ const LOG_TAG = '[VPI]'; /** * 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'; /** * Init. * * @since 4.7 */ public function __construct() { $this->_summary = self::get_summary(); } /** * Svc id slug — drives queue type, Cloud::SVC_VPI, and summary key prefix. * * @return string */ protected function _svc_id() { return 'vpi'; } /** * Response field carrying the viewport image data. * * @return string */ protected function _data_key() { return 'data_vpi'; } /** * UI templates read `last_request` directly (settings_vpi.tpl.php, * dashboard.tpl.php). Keep the legacy unsuffixed key. * * @return string */ protected function _last_request_key() { return 'last_request'; } /** * Build the request body for Cloud::post. * * @param string $queue_k Queue key. * @param array $v Queue item. * @return array */ protected function _build_payload( $queue_k, $v ) { return [ 'url' => $v['url'], 'queue_k' => $queue_k, 'user_agent' => $v['user_agent'], 'is_mobile' => ! empty( $v['is_mobile'] ) ? 1 : 0, ]; } /** * Persist the viewport image list to post meta. Empty/null payload is * persisted as an empty list (matches pre-refactor VPI behavior) so the * post is marked processed and not re-queued. * * @param mixed $data VPI data (array, string, or null). * @param string $queue_k Queue key. * @param array $v Queue item. * @return bool */ protected function _save_result( $data, $queue_k, $v ) { $name = ! empty( $v['is_mobile'] ) ? self::POST_META_MOBILE : self::POST_META; if ( is_array( $data ) ) { $urldecode = array_map( 'urldecode', $data ); } elseif ( null === $data || '' === $data ) { $urldecode = ''; } else { $urldecode = urldecode( (string) $data ); } self::debug( 'save data_vpi', $urldecode ); $this->cls( 'Metabox' )->save( (int) $v['post_id'], $name, $urldecode ); return true; } /** * Queue the current page for VPI generation. * * @since 4.7 * @return void */ public function add_to_queue() { $is_mobile = $this->_separate_mobile(); $request_url = Utility::request_url(); 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 ) >= $this->_max_queue_size() ) { self::debug( 'Queue is full - ' . $this->_max_queue_size() ); 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 ) ); } }
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