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<?php |
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/** |
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* Cache Preloader module. |
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* |
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* Owns the preloader's settings + the dashboard custom panel that pairs |
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* the schema controls with a Start/Stop/Status surface. |
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* |
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* Tier: Free (LiteSpeed parity — their crawler is free). |
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* Roadmap: §3 P3.1. |
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* |
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* @package XSpeed |
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*/ |
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|
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declare(strict_types=1); |
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|
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namespace XSpeed\Modules\Preloader; |
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|
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defined( 'ABSPATH' ) || exit; |
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|
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use XSpeed\Module; |
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use XSpeed\Preloader; |
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use XSpeed\Settings_Manager; |
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|
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final class PreloaderModule extends Module { |
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|
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public const SLUG = 'preloader'; |
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public const TIER = self::TIER_FREE; |
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public const VERSION = '1.0.0'; |
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|
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public function ui_metadata(): array { |
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return array( |
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'label' => 'Preloader', |
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'tab_label' => 'Crawl Now', // its own tab on the Preloader page |
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'icon' => 'Wand2', |
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'description' => 'Crawl the sitemap to warm cache so visitors never hit a cold MISS.', |
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// Custom panel wraps the schema-driven settings with a |
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// Start/Stop control surface + a live status readout |
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// (queue depth, last URL, recent errors). |
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'custom_panel' => 'PreloaderHost', |
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); |
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} |
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|
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public function settings_schema(): array { |
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return array( |
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'enabled' => array( |
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'type' => 'bool', |
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'default' => false, |
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'label' => 'Enable Preloader', |
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'description' => 'When on, xSpeed crawls the sitemap on the schedule below and warms the page cache.', |
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), |
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'schedule' => array( |
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'type' => 'enum', |
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'default' => 'manual', |
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'options' => array( 'manual', 'hourly', 'daily', 'weekly' ), |
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'option_labels' => array( |
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'manual' => 'Manual', |
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'hourly' => 'Hourly', |
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'daily' => 'Daily', |
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'weekly' => 'Weekly', |
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), |
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'label' => 'Schedule', |
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'description' => 'How often to start a fresh crawl. Manual means you trigger it from the dashboard.', |
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'dependsOn' => array( 'field' => 'enabled' ), |
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), |
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'batch_size' => array( |
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'type' => 'int', |
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'default' => 5, |
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'min' => 1, |
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'max' => 50, |
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'label' => 'Batch Size', |
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'description' => 'URLs warmed per cron tick. Higher = faster crawl, more load on the origin.', |
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'dependsOn' => array( 'field' => 'enabled' ), |
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), |
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'sitemap_url' => array( |
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'type' => 'string', |
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'default' => '', |
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'label' => 'Sitemap URL (optional)', |
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'description' => 'Override the auto-detected WordPress core sitemap (/wp-sitemap.xml). Leave blank for default.', |
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'dependsOn' => array( 'field' => 'enabled' ), |
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), |
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'warm_on_publish' => array( |
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'type' => 'bool', |
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'default' => true, |
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'label' => 'Warm new content immediately', |
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'description' => 'When a post or page is published, fetch it once so the first visitor sees a cache HIT, not a cold MISS.', |
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'dependsOn' => array( 'field' => 'enabled' ), |
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), |
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'warm_on_comment' => array( |
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'type' => 'bool', |
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'default' => false, |
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'label' => 'Re-warm after comments', |
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'description' => 'Re-warm a page after a comment is posted (Cache purges the page on comment; this fetches it back into cache).', |
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'dependsOn' => array( 'field' => 'enabled' ), |
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), |
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); |
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} |
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|
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public function rest_routes(): array { |
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// Module base gives us GET + POST for settings under |
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// /xspeed/v1/preloader/. We add Start/Stop/Status alongside. |
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$default = parent::rest_routes(); |
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return array_merge( |
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$default, |
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array( |
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array( |
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'path' => '/start', |
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'methods' => 'POST', |
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'callback' => array( $this, 'rest_start' ), |
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), |
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array( |
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'path' => '/stop', |
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'methods' => 'POST', |
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'callback' => array( $this, 'rest_stop' ), |
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), |
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array( |
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'path' => '/status', |
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'methods' => 'GET', |
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'callback' => array( $this, 'rest_status' ), |
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), |
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) |
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); |
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} |
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|
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public function cli_commands(): array { |
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return array( |
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array( |
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'name' => 'xspeed preloader', |
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'callback' => array( $this, 'cli_handler' ), |
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'shortdesc' => 'Drive the cache preloader (start | stop | status).', |
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'ai_hint' => 'Cache warming: crawl the site so visitors hit a warm cache instead of paying for the first render. Use after a full purge, or when the first visitor to each page reports a slow load.', |
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'synopsis' => array( |
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array( |
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'type' => 'positional', |
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'name' => 'action', |
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'options' => array( 'start', 'stop', 'status' ), |
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'optional' => false, |
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), |
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), |
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), |
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); |
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} |
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|
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public function boot(): void { |
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add_action( Preloader::CRON_HOOK, array( Preloader::class, 'tick' ) ); |
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add_action( 'xspeed_preloader_recurring', array( Preloader::class, 'recurring_kickoff' ) ); |
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|
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// Apply schedule changes immediately whenever this module's |
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// settings get written (the standard per-module option hook). |
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add_action( 'update_option_xspeed_module_preloader', array( $this, 'on_settings_change' ), 10, 2 ); |
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add_action( 'add_option_xspeed_module_preloader', array( $this, 'on_settings_added' ), 10, 2 ); |
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|
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// Content warmer — auto-warm a single URL on post publish / |
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// comment so the first visitor after a publish/comment sees a |
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// HIT, not the cold MISS that Cache::purge_all just created. |
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$opts = Settings_Manager::get( self::SLUG ); |
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if ( ! empty( $opts['warm_on_publish'] ) ) { |
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add_action( 'transition_post_status', array( $this, 'on_post_transition' ), 10, 3 ); |
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} |
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if ( ! empty( $opts['warm_on_comment'] ) ) { |
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add_action( 'comment_post', array( $this, 'on_comment_post' ), 20, 2 ); |
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} |
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} |
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|
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/** |
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* Hook: a post transitioned to publish. Warm its permalink once on |
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* shutdown so the post-save request itself stays fast. |
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* |
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* @param string $new New post status. |
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* @param string $old Old post status. |
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* @param \WP_Post $post Post object. |
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*/ |
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public function on_post_transition( $new, $old, $post ): void { |
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if ( 'publish' !== $new || 'publish' === $old ) { |
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return; |
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} |
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// Only warm public post types so we don't crawl private CPTs. |
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$post_type_obj = get_post_type_object( $post->post_type ); |
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if ( ! $post_type_obj || empty( $post_type_obj->public ) ) { |
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return; |
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} |
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$url = get_permalink( $post ); |
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if ( ! $url ) { |
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return; |
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} |
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// Defer to shutdown so the user's "Publish" click returns fast. |
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// (Cache::purge_all has already fired by then on the save_post |
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// hook, so the warm fetch lands AFTER the purge.) |
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add_action( |
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'shutdown', |
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static function () use ( $url ) { |
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Preloader::warm_one( $url, 'post published' ); |
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}, |
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20 |
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); |
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} |
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|
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/** |
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* Hook: comment posted. Warm the post's permalink so the page is |
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* back in cache before the next visitor lands. |
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* |
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* @param int $comment_id The comment ID. |
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* @param int $approved 1, 0, or 'spam'. |
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*/ |
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public function on_comment_post( $comment_id, $approved ): void { |
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// Approved comments only — pending/spam don't show on the |
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// public page and shouldn't trigger a warm. |
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if ( 1 !== (int) $approved ) { |
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return; |
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} |
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$comment = get_comment( $comment_id ); |
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if ( ! $comment || ! $comment->comment_post_ID ) { |
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return; |
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} |
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$url = get_permalink( (int) $comment->comment_post_ID ); |
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if ( ! $url ) { |
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return; |
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} |
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add_action( |
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'shutdown', |
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static function () use ( $url ) { |
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Preloader::warm_one( $url, 'comment posted' ); |
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}, |
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20 |
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); |
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} |
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|
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public function deactivate(): void { |
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wp_clear_scheduled_hook( Preloader::CRON_HOOK ); |
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wp_clear_scheduled_hook( 'xspeed_preloader_recurring' ); |
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} |
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|
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public function on_settings_change( $old, $new ): void { |
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$enabled = is_array( $new ) && ! empty( $new['enabled'] ); |
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$schedule = is_array( $new ) ? (string) ( $new['schedule'] ?? 'manual' ) : 'manual'; |
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Preloader::apply_schedule( $enabled ? $schedule : 'manual' ); |
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} |
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|
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public function on_settings_added( $name, $value ): void { |
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$enabled = is_array( $value ) && ! empty( $value['enabled'] ); |
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$schedule = is_array( $value ) ? (string) ( $value['schedule'] ?? 'manual' ) : 'manual'; |
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Preloader::apply_schedule( $enabled ? $schedule : 'manual' ); |
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} |
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|
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public function rest_start( \WP_REST_Request $request ) { |
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$opts = Settings_Manager::get( self::SLUG ); |
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if ( empty( $opts['enabled'] ) ) { |
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return new \WP_Error( |
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'xspeed_preloader_disabled', |
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__( 'Enable the preloader before starting a crawl.', 'xspeed' ), |
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array( 'status' => 409 ) |
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); |
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} |
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return rest_ensure_response( Preloader::start() ); |
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} |
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|
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public function rest_stop( \WP_REST_Request $request ) { |
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return rest_ensure_response( Preloader::stop() ); |
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} |
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|
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public function rest_status( \WP_REST_Request $request ) { |
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return rest_ensure_response( Preloader::status() ); |
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} |
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|
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public function cli_handler( array $args, array $assoc ): void { |
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$action = $args[0] ?? 'status'; |
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|
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switch ( $action ) { |
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case 'start': |
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$opts = Settings_Manager::get( self::SLUG ); |
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if ( empty( $opts['enabled'] ) ) { |
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\WP_CLI::error( 'Preloader is disabled. Enable it via wp xspeed preloader set --enabled=1 first.' ); |
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return; |
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} |
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$state = Preloader::start(); |
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// Don't print a green Success over a crawl that queued |
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// nothing — that exit-0 was the whole complaint in #142. |
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$sitemap_error = (string) ( $state['sitemap_error'] ?? '' ); |
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if ( 0 === (int) $state['total'] ) { |
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\WP_CLI::error( |
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'' !== $sitemap_error |
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? sprintf( 'Queued 0 URLs. %s', $sitemap_error ) |
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: 'Queued 0 URLs — nothing to warm. Check the sitemap URL and the cache exclusion rules.' |
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); |
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return; |
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} |
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if ( 'fallback' === ( $state['source'] ?? '' ) ) { |
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\WP_CLI::warning( $sitemap_error ); |
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\WP_CLI::success( |
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sprintf( |
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'Queued %d URL%s from the site content instead of the sitemap.', |
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$state['total'], |
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1 === $state['total'] ? '' : 's' |
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) |
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); |
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return; |
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} |
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\WP_CLI::success( sprintf( 'Queued %d URL%s.', $state['total'], 1 === $state['total'] ? '' : 's' ) ); |
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return; |
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|
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case 'stop': |
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Preloader::stop(); |
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\WP_CLI::success( 'Preloader stopped.' ); |
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return; |
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|
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case 'status': |
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$state = Preloader::status(); |
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\WP_CLI::log( 'Running : ' . ( $state['running'] ? 'yes' : 'no' ) ); |
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\WP_CLI::log( 'Processed : ' . $state['processed'] . ' / ' . $state['total'] ); |
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if ( $state['last_url'] ) { |
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\WP_CLI::log( 'Last URL : ' . $state['last_url'] ); |
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} |
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if ( ! empty( $state['errors'] ) ) { |
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\WP_CLI::log( 'Errors : ' . count( $state['errors'] ) ); |
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foreach ( array_slice( $state['errors'], -5 ) as $e ) { |
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// Tolerate a bare string as well as the {url, error} |
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// shape. A string entry fataled this command outright |
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// ("Cannot access offset of type string on string"), |
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// which also took MCP's get_preloader_status down with |
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// it — an agent asking why a preload failed got a type |
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// error instead of the reason. The writer is fixed, but |
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// `status` is a diagnostic: it should survive whatever |
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// it is handed rather than die reporting on it. (QA F1) |
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if ( is_array( $e ) ) { |
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$url = isset( $e['url'] ) ? (string) $e['url'] : ''; |
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$msg = isset( $e['error'] ) ? (string) $e['error'] : ''; |
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// The sitemap message already names the URL, so |
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// prefixing it would print the URL twice on one line. |
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$line = ( '' !== $url && false === strpos( $msg, $url ) ) |
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? $url . ' — ' . $msg |
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: $msg; |
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} else { |
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$line = (string) $e; |
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} |
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\WP_CLI::log( ' ' . $line ); |
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} |
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} |
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return; |
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|
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default: |
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\WP_CLI::error( "Unknown action: $action" ); |
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} |
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} |
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} |
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|
