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<?php |
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/** |
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* Heartbeat Control module. |
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* |
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* Controls the WordPress Heartbeat API per context (dashboard / editor / |
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* frontend) and tunes its interval. Disabling heartbeat on the frontend |
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* is one of the cheapest wins for sites that don't need polling there. |
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* |
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* Tier: Free (1:1 with LiteSpeed Cache). |
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* Roadmap: §4.3. |
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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\Heartbeat; |
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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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|
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final class HeartbeatModule extends Module { |
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|
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public const SLUG = 'heartbeat'; |
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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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// Per-context behavior values stored under `behavior_<context>`. |
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public const BEHAVIOR_KEEP = 'keep'; // leave alone |
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public const BEHAVIOR_THROTTLE = 'throttle'; // apply our `frequency` |
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public const BEHAVIOR_DISABLE = 'disable'; // turn off entirely |
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|
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private const CONTEXTS = array( 'dashboard', 'editor', 'frontend' ); |
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|
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public function ui_metadata(): array { |
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return array( |
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'label' => __( 'Heartbeat', 'xspeed' ), |
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'icon' => 'Activity', |
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'description' => __( 'Controls how often WordPress checks in with your server in the background.', 'xspeed' ), |
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'group' => 'performance', |
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); |
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} |
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|
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/** |
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* Default profile mirrors the IMPLEMENTATION recommendation: |
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* - frontend: off by default (most polling-heavy, rarely needed) |
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* - editor: throttled to 60s (was 15s) |
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* - dashboard: throttled to 60s (was 60s — left as is) |
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*/ |
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public function settings_schema(): array { |
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$behavior_options = array( self::BEHAVIOR_KEEP, self::BEHAVIOR_THROTTLE, self::BEHAVIOR_DISABLE ); |
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$behavior_option_labels = array( |
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self::BEHAVIOR_KEEP => 'Keep', |
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self::BEHAVIOR_THROTTLE => 'Throttle', |
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self::BEHAVIOR_DISABLE => 'Disable', |
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); |
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|
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return array( |
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'behavior_dashboard' => array( |
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'type' => 'enum', |
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'default' => self::BEHAVIOR_THROTTLE, |
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'options' => $behavior_options, |
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'option_labels' => $behavior_option_labels, |
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'label' => __( 'Dashboard', 'xspeed' ), |
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'description' => __( 'Background checks on admin screens, used for notifications.', 'xspeed' ), |
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), |
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'behavior_editor' => array( |
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'type' => 'enum', |
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'default' => self::BEHAVIOR_THROTTLE, |
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'options' => $behavior_options, |
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'option_labels' => $behavior_option_labels, |
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'label' => __( 'Editor', 'xspeed' ), |
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'description' => __( 'Background checks in the post editor. Disable only if you do not need autosave or the warning when someone else is editing.', 'xspeed' ), |
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), |
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'behavior_frontend' => array( |
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'type' => 'enum', |
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'default' => self::BEHAVIOR_DISABLE, |
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'options' => $behavior_options, |
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'option_labels' => $behavior_option_labels, |
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'label' => __( 'Frontend', 'xspeed' ), |
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'description' => __( 'Background checks on the public site, which only some plugins add. Disable is recommended, as it cuts extra requests to your server.', 'xspeed' ), |
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), |
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'frequency' => array( |
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'type' => 'int', |
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'default' => 60, |
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'min' => 15, |
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'max' => 300, |
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'label' => __( 'Throttle interval', 'xspeed' ), |
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'unit' => 'seconds', |
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'description' => __( 'Seconds between checks where you chose Throttle. 60 suits most sites; a lower number means more requests.', 'xspeed' ), |
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'advanced' => true, |
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'dependsOn' => array( |
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'any' => array( |
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array( 'field' => 'behavior_dashboard', 'value' => self::BEHAVIOR_THROTTLE ), |
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array( 'field' => 'behavior_editor', 'value' => self::BEHAVIOR_THROTTLE ), |
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array( 'field' => 'behavior_frontend', 'value' => self::BEHAVIOR_THROTTLE ), |
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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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// rest_routes — using the Module base-class default (GET + POST under |
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// /xspeed/v1/heartbeat/ wired to rest_get_settings + rest_update_settings). |
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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 heartbeat', |
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'callback' => array( $this, 'cli_handler' ), |
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'shortdesc' => 'Inspect or modify xSpeed heartbeat settings.', |
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'ai_hint' => 'Inspect or change WordPress Heartbeat (admin-ajax polling) frequency. Use for high admin-ajax.php CPU load, or hosting warnings about too many background requests.', |
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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( 'show', 'set' ), |
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'optional' => false, |
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), |
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// Use `--for` (not `--context`): WP-CLI silently swallows a |
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// `--context` assoc arg before it reaches the command, so |
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// `set --context= --behavior=` always lost the context and |
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// errored "Nothing to set". `--for` reads naturally |
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// (set --for=editor --behavior=disable) and is collision- |
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// free. No `options` constraint either — an options list |
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// also dropped args from $assoc; we validate in |
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// cli_handler() instead. (FBS-82153 Bug 2.) |
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array( |
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'type' => 'assoc', |
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'name' => 'for', |
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'optional' => true, |
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), |
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array( |
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'type' => 'assoc', |
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'name' => 'behavior', |
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'optional' => true, |
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), |
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array( |
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'type' => 'assoc', |
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'name' => 'frequency', |
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'optional' => true, |
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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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// Context resolution depends on WHEN we can classify the request: |
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// - Frontend: known at `init` (is_admin() is reliable there), and we |
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// must act before wp_enqueue_scripts (priority 10) registers the |
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// heartbeat script. |
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// - Admin: dashboard-vs-editor needs get_current_screen(), which is |
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// NULL at `init` and only populated from the `current_screen` |
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// action onward. Resolving context at init always returned |
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// "dashboard" on editor screens, so behavior_editor was dead. |
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// (FBS-82153 Bug 1.) Hook admin on `current_screen` instead, which |
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// fires before admin_enqueue_scripts so we can still dequeue. |
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if ( is_admin() ) { |
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add_action( 'current_screen', array( $this, 'apply_settings' ) ); |
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} else { |
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add_action( 'init', array( $this, 'apply_settings' ), 5 ); |
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} |
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} |
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|
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/** |
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* Hook handler — translates our settings into Heartbeat behavior. Runs |
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* on every request. The branches below are pure read + dispatch — no |
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* I/O so the cost is negligible even on cached requests. |
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*/ |
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public function apply_settings(): void { |
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$settings = $this->get_settings(); |
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$context = $this->detect_context(); |
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$behavior = $settings[ 'behavior_' . $context ] ?? self::BEHAVIOR_KEEP; |
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|
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if ( self::BEHAVIOR_DISABLE === $behavior ) { |
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// Dequeue the heartbeat script entirely. wp_deregister_script |
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// runs on `init` priority 5 → before wp_default_scripts |
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// (priority 10) re-registers, so we hook the actual enqueue |
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// stage instead. |
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add_action( 'wp_enqueue_scripts', array( $this, 'dequeue_heartbeat' ), 1 ); |
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add_action( 'admin_enqueue_scripts', array( $this, 'dequeue_heartbeat' ), 1 ); |
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} elseif ( self::BEHAVIOR_THROTTLE === $behavior ) { |
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$interval = max( 15, min( 300, (int) ( $settings['frequency'] ?? 60 ) ) ); |
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add_filter( |
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'heartbeat_settings', |
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static function ( $hb_settings ) use ( $interval ) { |
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$hb_settings['interval'] = $interval; |
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return $hb_settings; |
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} |
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); |
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} |
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// BEHAVIOR_KEEP → no filter, WP defaults apply. |
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} |
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|
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/** |
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* Dequeue + deregister the heartbeat script. Safe to call multiple |
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* times — both wp functions are idempotent. |
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*/ |
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public function dequeue_heartbeat(): void { |
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wp_dequeue_script( 'heartbeat' ); |
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wp_deregister_script( 'heartbeat' ); |
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} |
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|
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/** |
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* Classify the current request into dashboard / editor / frontend. |
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* Editor here means the block / classic post editor screens — they're |
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* the heaviest heartbeat consumer and worth their own bucket. |
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*/ |
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private function detect_context(): string { |
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if ( ! is_admin() ) { |
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return 'frontend'; |
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} |
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$screen = function_exists( 'get_current_screen' ) ? get_current_screen() : null; |
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if ( $screen && in_array( $screen->base, array( 'post', 'post-new' ), true ) ) { |
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return 'editor'; |
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} |
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return 'dashboard'; |
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} |
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|
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// REST handlers — provided by Module base class |
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// (rest_get_settings / rest_update_settings). |
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|
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public function cli_handler( array $args, array $assoc ): void { |
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$action = $args[0] ?? 'show'; |
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|
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if ( 'show' === $action ) { |
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$opts = $this->get_settings(); |
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foreach ( $opts as $key => $value ) { |
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\WP_CLI::log( sprintf( '%-22s %s', $key, is_scalar( $value ) ? (string) $value : wp_json_encode( $value ) ) ); |
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} |
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return; |
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} |
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|
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if ( 'set' === $action ) { |
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$patch = array(); |
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$behaviors = array( self::BEHAVIOR_KEEP, self::BEHAVIOR_THROTTLE, self::BEHAVIOR_DISABLE ); |
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|
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$has_context = isset( $assoc['for'] ) && '' !== $assoc['for']; |
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$has_behavior = isset( $assoc['behavior'] ) && '' !== $assoc['behavior']; |
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|
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// --for and --behavior are a pair: both or neither. |
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if ( $has_context xor $has_behavior ) { |
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\WP_CLI::error( 'Pass --for and --behavior together.' ); |
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return; |
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} |
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if ( $has_context && $has_behavior ) { |
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if ( ! in_array( $assoc['for'], self::CONTEXTS, true ) ) { |
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\WP_CLI::error( 'Invalid --for. Use one of: ' . implode( ', ', self::CONTEXTS ) . '.' ); |
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return; |
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} |
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if ( ! in_array( $assoc['behavior'], $behaviors, true ) ) { |
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\WP_CLI::error( 'Invalid --behavior. Use one of: ' . implode( ', ', $behaviors ) . '.' ); |
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return; |
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} |
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$patch[ 'behavior_' . $assoc['for'] ] = $assoc['behavior']; |
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} |
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if ( isset( $assoc['frequency'] ) ) { |
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$patch['frequency'] = (int) $assoc['frequency']; |
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} |
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if ( empty( $patch ) ) { |
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\WP_CLI::error( 'Nothing to set. Provide --for= --behavior= and/or --frequency=' ); |
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return; |
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} |
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$this->update_settings( $patch ); |
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\WP_CLI::success( 'Updated heartbeat settings.' ); |
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return; |
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} |
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|
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\WP_CLI::error( "Unknown action: $action" ); |
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} |
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} |
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|
