Closes #7063: Google font - Frontend part

inc/Engine/Media/Fonts/Context/Context.php

@@ -0,0 +1,27 @@
+<?php
+declare(strict_types=1);
+
+namespace WP_Rocket\Engine\Media\Fonts\Context;
+
+use WP_Rocket\Engine\Common\Context\AbstractContext;
+
+class Context extends AbstractContext {
+	/**
+	 * Checks if the feature is allowed.
+	 *
+	 * @param array $data Optional. Data to check against.
+	 *
+	 * @return bool
+	 */
+	public function is_allowed( array $data = [] ): bool {
+		$is_allowed = $this->run_common_checks(
+			[
+				'do_not_optimize' => false,
+				'bypass'          => false,
+				'option'          => 'host_fonts_locally',
+			]
+		);
+
+		return $is_allowed;
+	}
+}

inc/Engine/Media/Fonts/Frontend/Controller.php

@@ -0,0 +1,113 @@
+<?php
+declare(strict_types=1);
+
+namespace WP_Rocket\Engine\Media\Fonts\Frontend;
+
+use WP_Rocket\Engine\Media\Fonts\Context\Context;
+use WP_Rocket\Engine\Optimization\RegexTrait;
+use WP_Rocket\Logger\Logger;
+
+class Controller {
+	use RegexTrait;
+
+	/**
+	 * Context instance.
+	 *
+	 * @var Context
+	 */
+	private $context;
+
+	/**
+	 * Base url.
+	 *
+	 * @var string
+	 */
+	private $base_url;
+
+	/**
+	 * Constructor.
+	 *
+	 * @param Context $context Context instance.
+	 */
+	public function __construct( Context $context ) {
+		$this->context  = $context;
+		$this->base_url = rocket_get_constant( 'WP_ROCKET_CACHE_ROOT_URL', '' ) . 'fonts/' . get_current_blog_id() . '/';
+	}
+
+	/**
+	 * Rewrites the Google Fonts paths to local ones.
+	 *
+	 * @param string $html HTML content.
+	 * @return string
+	 */
+	public function rewrite_fonts( string $html ): string {
+		if ( ! $this->context->is_allowed() ) {
+			return $html;
+		}
+
+		$html_nocomments = $this->hide_comments( $html );
+
+		$v1_fonts = $this->find( '<link(?:\s+(?:(?!href\s*=\s*)[^>])+)?(?:\s+href\s*=\s*([\'"])(?<url>(?:https?:)?\/\/fonts\.googleapis\.com\/css[^\d](?:(?!\1).)+)\1)(?:\s+[^>]*)?>', $html_nocomments );
+		$v2_fonts = $this->find( '<link(?:\s+(?:(?!href\s*=\s*)[^>])+)?(?:\s+href\s*=\s*([\'"])(?<url>(?:https?:)?\/\/fonts\.googleapis\.com\/css2(?:(?!\1).)+)\1)(?:\s+[^>]*)?>', $html_nocomments );
+
+		if ( ! $v1_fonts && ! $v2_fonts ) {
+			Logger::debug( 'No Google Fonts found.', [ 'Host Fonts Locally' ] );
+			return $html;
+		}
+
+		foreach ( $v1_fonts as $font ) {
+			$html = $this->replace_font( $font, $html );
+		}
+
+		foreach ( $v2_fonts as $font ) {
+			$html = $this->replace_font( $font, $html );
+		}
+
+		return $html;
+	}
+
+	/**
+	 * Replaces the Google Fonts URL with the local one.
+	 *
+	 * @param array  $font Font data.
+	 * @param string $html HTML content.
+	 *
+	 * @return string
+	 */
+	private function replace_font( $font, $html ): string {
+		$hash  = md5( $font['url'] );
+		$local = $this->get_optimized_markup( $hash, $font['url'] );
+
+		return str_replace( $font[0], $local, $html );
+	}
+
+	/**
+	 * Returns the optimized markup for Google Fonts
+	 *
+	 * @since 3.18
+	 *
+	 * @param string $hash Font Url has.
+	 * @param string $original_url Fonts Url.
+	 *
+	 * @return string
+	 */
+	protected function get_optimized_markup( string $hash, string $original_url ): string {
+		$levels = 3;
+		$base   = substr( $hash, 0, $levels );
+		$remain = substr( $hash, $levels );
+
+		$path_array   = str_split( $base );
+		$path_array[] = $remain;
+
+		$path = implode( '/', $path_array );
+		$url  = $this->base_url . $path . '.css';
+
+		$gf_parameters = wp_parse_url( $original_url, PHP_URL_QUERY );
+
+		return sprintf(
+			'<link rel="stylesheet" href="%1$s" data-wpr-hosted-gf-parameters="%2$s"/>', // phpcs:ignore WordPress.WP.EnqueuedResources.NonEnqueuedStylesheet
+			$url,
+			$gf_parameters
+		);
+	}
+}

inc/Engine/Media/Fonts/Frontend/Subscriber.php

@@ -0,0 +1,45 @@
+<?php
+declare(strict_types=1);
+
+namespace WP_Rocket\Engine\Media\Fonts\Frontend;
+
+use WP_Rocket\Event_Management\Subscriber_Interface;
+
+class Subscriber implements Subscriber_Interface {
+	/**
+	 * Frontend Controller instance.
+	 *
+	 * @var Controller
+	 */
+	private $frontend_controller;
+
+	/**
+	 * Constructor.
+	 *
+	 * @param Controller $frontend_controller Frontend Controller instance.
+	 */
+	public function __construct( Controller $frontend_controller ) {
+		$this->frontend_controller = $frontend_controller;
+	}
+
+	/**
+	 * Returns an array of events that this subscriber wants to listen to.
+	 *
+	 * @return array
+	 */
+	public static function get_subscribed_events(): array {
+		return [
+			'rocket_buffer' => [ 'rewrite_fonts', 18 ],
+		];
+	}
+
+	/**
+	 * Rewrites the Google Fonts paths to local ones.
+	 *
+	 * @param string $html HTML content.
+	 * @return string
+	 */
+	public function rewrite_fonts( string $html ): string {
+		return $this->frontend_controller->rewrite_fonts( $html );
+	}
+}

inc/Engine/Media/Fonts/ServiceProvider.php

@@ -6,6 +6,9 @@
 use WP_Rocket\Dependencies\League\Container\ServiceProvider\AbstractServiceProvider;
 use WP_Rocket\Engine\Media\Fonts\Admin\Settings;
 use WP_Rocket\Engine\Media\Fonts\Admin\Subscriber as AdminSubscriber;
+use WP_Rocket\Engine\Media\Fonts\Context\Context;
+use WP_Rocket\Engine\Media\Fonts\Frontend\Controller as FrontendController;
+use WP_Rocket\Engine\Media\Fonts\Frontend\Subscriber as FrontendSubscriber;
 
 class ServiceProvider extends AbstractServiceProvider {
 	/**
@@ -20,6 +23,9 @@ class ServiceProvider extends AbstractServiceProvider {
 	protected $provides = [
 		'media_fonts_settings',
 		'media_fonts_admin_subscriber',
+		'media_fonts_context',
+		'media_fonts_frontend_controller',
+		'media_fonts_frontend_subscriber',
 	];
 
 	/**
@@ -42,5 +48,18 @@ public function register(): void {
 		$this->getContainer()->add( 'media_fonts_settings', Settings::class );
 		$this->getContainer()->addShared( 'media_fonts_admin_subscriber', AdminSubscriber::class )
 			->addArgument( 'media_fonts_settings' );
+
+		$this->getContainer()->add( 'media_fonts_context', Context::class )
+			->addArgument( $this->getContainer()->get( 'options' ) );
+		$this->getContainer()->add( 'media_fonts_frontend_controller', FrontendController::class )
+			->addArguments(
+				[
+					$this->getContainer()->get( 'media_fonts_context' ),
+				]
+			);
+		$this->getContainer()->add( 'media_fonts_frontend_subscriber', FrontendSubscriber::class )
+			->addArgument(
+				$this->getContainer()->get( 'media_fonts_frontend_controller' )
+			);
 	}
 }

inc/Engine/Optimization/GoogleFonts/Subscriber.php

@@ -54,7 +54,7 @@ public function __construct( AbstractGFOptimization $combine, AbstractGFOptimiza
 	public static function get_subscribed_events() {
 		return [
 			'wp_resource_hints' => [ 'preconnect', 10, 2 ],
-			'rocket_buffer'     => [ 'process', 1001 ],
+			'rocket_buffer'     => [ 'process', 17 ],
 		];
 	}
 

inc/Plugin.php

@@ -403,6 +403,7 @@ private function init_common_subscribers() {
 			'performance_hints_admin_subscriber',
 			'lrc_frontend_subscriber',
 			'taxonomy_subscriber',
+			'media_fonts_frontend_subscriber',
 			'media_fonts_admin_subscriber',
 		];
 

tests/Fixtures/inc/Engine/Media/Fonts/Context/Context/isAllowed.php

@@ -0,0 +1,36 @@
+<?php
+
+return [
+	'testShouldReturnFalseWhenBypass' => [
+		'config' => [
+			'bypass' => true,
+			'do_not_optimize' => false,
+			'option' => true,
+		],
+		'expected' => false,
+	],
+	'testShouldReturnFalseWhenDoNotOptimize' => [
+		'config' => [
+			'bypass' => false,
+			'do_not_optimize' => true,
+			'option' => true,
+		],
+		'expected' => false,
+	],
+	'testShouldReturnFalseWhenOptionDisabled' => [
+		'config' => [
+			'bypass' => false,
+			'do_not_optimize' => true,
+			'option' => false,
+		],
+		'expected' => false,
+	],
+	'testShouldReturnTrueWhenOptionEnabled' => [
+		'config' => [
+			'bypass' => false,
+			'do_not_optimize' => false,
+			'option' => true,
+		],
+		'expected' => true,
+	],
+];

tests/Fixtures/inc/Engine/Media/Fonts/Frontend/Controller/HTML/expected_v1.php

@@ -0,0 +1,33 @@
+<?php
+/**
+ * Template Name: Google Font V1 Template
+ */ ?>
+
+<!DOCTYPE html>
+<html>
+<head>
+	<meta charset="UTF-8">
+	<meta name="viewport" content="width=device-width, initial-scale=1.0">
+	<title>Google Font V1 Template</title>
+	<link rel="stylesheet" href="http://example.org/wp-content/cache/fonts/1/e/b/c/173c0fc97eef86a6e51ada56c5a9a.css" data-wpr-hosted-gf-parameters="family=Roboto"/>
+	<link rel="stylesheet" href="http://example.org/wp-content/cache/fonts/1/5/9/5/cb6ccb56826a802ed411cef875f0e.css" data-wpr-hosted-gf-parameters="family=Open+Sans"/>
+	<style>
+		.roboto-font {
+			font-family: 'Roboto', sans-serif;
+		}
+		.open-sans-font {
+			font-family: 'Open Sans', sans-serif;
+		}
+	</style>
+</head>
+<body>
+<div class="wrap">
+	<div id="primary" class="content-area">
+		<main id="main" class="site-main">
+			<h1 class="roboto-font">Hello World</h1>
+			<p class="open-sans-font">Welcome to the world</p>
+		</main><!-- #main -->
+	</div><!-- #primary -->
+</div><!-- .wrap -->
+</body>
+</html>

tests/Fixtures/inc/Engine/Media/Fonts/Frontend/Controller/HTML/expected_v1_v2.php

@@ -0,0 +1,41 @@
+<?php
+/**
+ * Template Name: Google Font V1 and V2 Template
+ */ ?>
+
+<!DOCTYPE html>
+<html>
+<head>
+	<meta charset="UTF-8">
+	<meta name="viewport" content="width=device-width, initial-scale=1.0">
+	<title>Google Font V1 and V2 Template</title>
+	<link rel="stylesheet" href="http://example.org/wp-content/cache/fonts/1/6/2/4/f2c2b9858423d0688793189f6e6cb.css" data-wpr-hosted-gf-parameters="family=Roboto|Open+Sans"/> <!-- V1 Fonts -->
+	<link rel="stylesheet" href="http://example.org/wp-content/cache/fonts/1/8/d/4/e42f26da0305c49cd3264956d8329.css" data-wpr-hosted-gf-parameters="family=Lato:wght@400;700&family=Montserrat:wght@400;700&display=swap"/> <!-- V2 Fonts -->
+	<style>
+		.v1-font-roboto {
+			font-family: 'Roboto', sans-serif;
+		}
+		.v1-font-open-sans {
+			font-family: 'Open Sans', sans-serif;
+		}
+		.v2-font-lato {
+			font-family: 'Lato', sans-serif;
+		}
+		.v2-font-montserrat {
+			font-family: 'Montserrat', sans-serif;
+		}
+	</style>
+</head>
+<body>
+<div class="wrap">
+	<div id="primary" class="content-area">
+		<main id="main" class="site-main">
+			<h1 class="v1-font-roboto">Hello World</h1>
+			<p class="v1-font-open-sans">Welcome to the world</p>
+			<h2 class="v2-font-lato">This is a subtitle</h2>
+			<p class="v2-font-montserrat">Enjoy your stay</p>
+		</main><!-- #main -->
+	</div><!-- #primary -->
+</div><!-- .wrap -->
+</body>
+</html>

tests/Fixtures/inc/Engine/Media/Fonts/Frontend/Controller/HTML/expected_v2.php

@@ -0,0 +1,33 @@
+<?php
+/**
+ * Template Name: Google Font V2 Template
+ */ ?>
+
+<!DOCTYPE html>
+<html>
+<head>
+	<meta charset="UTF-8">
+	<meta name="viewport" content="width=device-width, initial-scale=1.0">
+	<title>Google Font V2 Template</title>
+	<link rel="stylesheet" href="http://example.org/wp-content/cache/fonts/1/a/b/2/8ffb4f83584e9add1be594dd90dfd.css" data-wpr-hosted-gf-parameters="family=Roboto:wght@400;700&display=swap"/>
+	<link rel="stylesheet" href="http://example.org/wp-content/cache/fonts/1/b/4/d/9ffca0114d3acb6ab0b068feaf933.css" data-wpr-hosted-gf-parameters="family=Lato:wght@400;700&display=swap"/>
+	<style>
+		.roboto-font {
+			font-family: 'Roboto', sans-serif;
+		}
+		.lato-font {
+			font-family: 'Lato', sans-serif;
+		}
+	</style>
+</head>
+<body>
+<div class="wrap">
+	<div id="primary" class="content-area">
+		<main id="main" class="site-main">
+			<h1 class="roboto-font">Hello World</h1>
+			<p class="lato-font">Welcome to the world</p>
+		</main><!-- #main -->
+	</div><!-- #primary -->
+</div><!-- .wrap -->
+</body>
+</html>