Add optimization for Contact Form 7 (#6215)

Co-authored-by: Ahmed Saed <[email protected]> Co-authored-by: Rémy Perona <[email protected]> Co-authored-by: Weston Ruter <[email protected]> Co-authored-by: WordPress Fan <[email protected]>
wp-media · Nov 29, 2023 · f588be9 · f588be9
1 parent c1bce62
commit f588be9
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Showing 3 changed files with 65 additions and 0 deletions.
diff --git a/inc/Plugin.php b/inc/Plugin.php
@@ -381,6 +381,7 @@ private function init_common_subscribers() {
 			'lazyload_css_subscriber',
 			'shoptimizer',
 			'weglot',
+			'contactform7',
 		];
 
 		$host_type = HostResolver::get_host_service();

diff --git a/inc/ThirdParty/Plugins/ContactForm7.php b/inc/ThirdParty/Plugins/ContactForm7.php
@@ -0,0 +1,61 @@
+<?php
+namespace WP_Rocket\ThirdParty\Plugins;
+
+use WP_Rocket\Event_Management\Subscriber_Interface;
+
+class ContactForm7 implements Subscriber_Interface {
+
+	/**
+	 * Required CF6 version.
+	 *
+	 * Version in which the wpcf7_shortcode_callback action was introduced.
+	 *
+	 * @var string
+	 */
+	const REQUIRED_CF7_VERSION = '5.8.1';
+
+	/**
+	 * Subscribed events.
+	 */
+	public static function get_subscribed_events() {
+		return [
+			'template_redirect' => [ 'maybe_optimize_contact_form_7', 10 ],
+		];
+	}
+
+	/**
+	 * Optimize ContactForm7 scripts.
+	 */
+	public function maybe_optimize_contact_form_7() {
+		// The wpcf7_shortcode_callback action was added in CF7 version 5.8.1.
+		if ( ! defined( 'WPCF7_VERSION' ) || version_compare( WPCF7_VERSION, self::REQUIRED_CF7_VERSION, '<' ) ) {
+			return;
+		}
+
+		// Force scripts and styles to not load by default.
+		add_filter( 'wpcf7_load_js', '__return_false', PHP_INT_MAX );
+		add_filter( 'wpcf7_load_css', '__return_false', PHP_INT_MAX );
+
+		// Conditionally enqueue scripts.
+		add_action( 'wpcf7_shortcode_callback', [ $this, 'conditionally_enqueue_scripts' ] );
+		add_action( 'wpcf7_shortcode_callback',  [ $this, 'conditionally_enqueue_styles' ] );
+	}
+
+	/**
+	 * Enqueue scripts if not already enqueued.
+	 */
+	public function conditionally_enqueue_scripts() {
+		if ( ! did_action( 'wpcf7_enqueue_scripts' ) ) { // Prevent double-enqueueing when multiple forms present.
+			wpcf7_enqueue_scripts();
+		}
+	}
+
+	/**
+	 * Enqueue styles if not already enqueued.
+	 */
+	public function conditionally_enqueue_styles() {
+		if ( ! did_action( 'wpcf7_enqueue_styles' ) ) { // Prevent double-enqueueing when multiple forms present.
+			wpcf7_enqueue_styles();
+		}
+	}
+}
diff --git a/inc/ThirdParty/ServiceProvider.php b/inc/ThirdParty/ServiceProvider.php
@@ -36,6 +36,7 @@
 use WP_Rocket\ThirdParty\Plugins\CDN\{Cloudflare, CloudflareFacade};
 use WP_Rocket\ThirdParty\Plugins\Jetpack;
 use WP_Rocket\ThirdParty\Plugins\WPGeotargeting;
+use WP_Rocket\ThirdParty\Plugins\ContactForm7;
 use WP_Rocket\ThirdParty\Plugins\SEO\RankMathSEO;
 use WP_Rocket\ThirdParty\Plugins\SEO\AllInOneSEOPack;
 use WP_Rocket\ThirdParty\Plugins\SEO\SEOPress;
@@ -103,6 +104,7 @@ class ServiceProvider extends AbstractServiceProvider {
 		'translatepress',
 		'wpgeotargeting',
 		'weglot',
+		'contactform7',
 	];
 
 	/**
@@ -261,5 +263,6 @@ public function register() {
 			->share( 'weglot', Weglot::class );
 		$this->getContainer()->share( 'translatepress', TranslatePress::class );
 		$this->getContainer()->share( 'wpgeotargeting', WPGeotargeting::class );
+		$this->getContainer()->share( 'contactform7', ContactForm7::class );
 	}
 }