Closes #7062 Fonts filesystem

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

@@ -0,0 +1,217 @@
+<?php
+
+declare(strict_types=1);
+
+namespace WP_Rocket\Engine\Media\Fonts\Controller;
+
+class Filesystem {
+	/**
+	 * WP Filesystem instance
+	 *
+	 * @var WP_Filesystem_Direct
+	 */
+	private $filesystem;
+
+	/**
+	 * Path to the fonts storage
+	 *
+	 * @var string
+	 */
+	private $path;
+
+	/**
+	 * Version of the fonts.
+	 *
+	 * @var int
+	 */
+	private $version;
+
+	/**
+	 * Instantiate the class
+	 *
+	 * @param string               $base_path Base path to the fonts storage.
+	 * @param WP_Filesystem_Direct $filesystem WP Filesystem instance.
+	 */
+	public function __construct( $base_path, $filesystem = null ) {
+		$this->filesystem = is_null( $filesystem ) ? rocket_direct_filesystem() : $filesystem;
+		$this->path       = $base_path . get_current_blog_id() . '/';
+	}
+
+	/**
+	 * Hash the url
+	 *
+	 * @param string $url Url of the page to hash.
+	 *
+	 * @return string
+	 */
+	private function hash_url( string $url ): string {
+		return md5( $url );
+	}
+
+	/**
+	 * Write font css to path
+	 *
+	 * @param string $font_url The font url to save locally.
+	 * @param string $provider The url of the page.
+	 *
+	 * @return bool
+	 */
+	public function write_font_css( string $font_url, string $provider ): bool {
+		global $wp;
+		$url = untrailingslashit( home_url( add_query_arg( [], $wp->request ) ) );
+
+		$font_provider_path = $this->get_font_provider_path( $provider );
+		$hash_url           = $this->hash_url( $url );
+		$file               = $this->get_fonts_full_path( $font_provider_path, $hash_url );
+		$css_file_name      = $file . $hash_url . '.css';
+		$relative_path      = $this->get_fonts_relative_path( $font_provider_path, $hash_url );
+
+		if ( ! rocket_mkdir_p( dirname( $file ) ) ) {
+			return false;
+		}
+
+		$css_content = $this->download_font( html_entity_decode( $font_url ) );
+
+		if ( ! $css_content ) {
+			return false;
+		}
+
+		preg_match_all( '/url\((https:\/\/[^)]+)\)/', $css_content, $matches );
+		$font_urls = $matches[1];
+		$local_css = $css_content;
+
+		foreach ( $font_urls as $font_url ) {
+			$parsed_url = wp_parse_url( $font_url );
+			$path_parts = explode( '/', trim( $parsed_url['path'], '/' ) );
+			$local_path = $file . implode( '/', $path_parts );
+			$local_dir  = dirname( $local_path );
+
+			rocket_mkdir_p( $local_dir );
+
+			if ( ! file_exists( $local_path ) ) {
+				$font_content = $this->download_font( $font_url );
+
+				if ( ! $font_content ) {
+					continue;
+				}
+
+				$this->filesystem->put_contents( $local_path, $font_content, rocket_get_filesystem_perms( 'file' ) );
+			}
+
+			$local_url = content_url( $relative_path . implode( '/', $path_parts ) );
+			$local_css = str_replace( $font_url, $local_url, $local_css );
+		}
+
+		return $this->filesystem->put_contents( $css_file_name, $local_css, rocket_get_filesystem_perms( 'file' ) );
+	}
+
+	/**
+	 * Download font from external url
+	 *
+	 * @param string $url Url of the file to download.
+	 *
+	 * @return bool|string
+	 */
+	private function download_font( string $url ): bool|string {
+		$content = wp_remote_retrieve_body(
+			wp_remote_get(
+			$url,
+			[
+				'user-agent'  => 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/91.0.4472.124 Safari/537.36',
+				'httpversion' => '2.0',
+			]
+			)
+			);
+
+		if ( ! $content ) {
+			return false;
+		}
+
+		return $content;
+	}
+
+	/**
+	 * Get the fonts path for the css file.
+	 *
+	 * @param string $provider Font provider.
+	 * @param string $hash_url Url of the page.
+	 *
+	 * @return string Path for the font file.
+	 */
+	private function get_fonts_full_path( string $provider, string $hash_url ): string {
+		$font_provider_path = $this->get_font_provider_path( $provider );
+
+		return $this->path . $font_provider_path . $hash_url . '/' . $this->get_version() . '/';
+	}
+
+
+	/**
+	 * Get the fonts relative paths
+	 *
+	 * @param string $font_provider_path Font provider path.
+	 * @param string $hash_url Url of the page.
+	 *
+	 * @return string
+	 */
+	private function get_fonts_relative_path( string $font_provider_path, string $hash_url, ): string {
+		$full_path     = $this->path . $font_provider_path;
+		$relative_path = str_replace( WP_CONTENT_DIR, '', $full_path );
+
+		return $relative_path . $hash_url . '/' . $this->get_version() . '/';
+	}
+
+	/**
+	 * Get the fonts provider path
+	 *
+	 * @param string $provider The font provider.
+	 *
+	 * @return string
+	 */
+	private function get_font_provider_path( string $provider ): string {
+		$provider = str_replace( '_', '-', $provider );
+
+		return $provider . '/';
+	}
+
+	/**
+	 * Deletes the locally stored fonts for the corresponding url
+	 *
+	 * @since 3.11.4
+	 *
+	 * @param string $url The url of the page to be deleted.
+	 *
+	 * @return bool
+	 */
+	public function delete_font_css( string $url ): bool {
+		$dir = $this->get_fonts_full_path( $this->get_font_provider_path( $url ), $url );
+
+		return $this->filesystem->delete( $dir, true, 'd' );
+	}
+
+	/**
+	 * Deletes all the font CSS files
+	 */
+	public function delete_all_font_css() {
+		// TODO:create method to recursively delete all locally stored fonts.
+	}
+
+	/**
+	 * Set the version of the fonts
+	 *
+	 * @param int $version The version of the font.
+	 *
+	 * @return void
+	 */
+	public function set_version( int $version ): void {
+		$this->version = $version;
+	}
+
+	/**
+	 * Get the font version
+	 *
+	 * @return int
+	 */
+	public function get_version(): int {
+		return $this->version;
+	}
+}

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

@@ -0,0 +1,58 @@
+<?php
+declare(strict_types=1);
+
+namespace WP_Rocket\Engine\Media\Fonts\Controller;
+
+use WP_Rocket\Admin\Options_Data;
+use WP_Rocket\Engine\Optimization\RegexTrait;
+
+class Fonts {
+	use RegexTrait;
+
+	/**
+	 * Filesystem instance.
+	 *
+	 * @var Filesystem
+	 */
+	private $filesystem;
+
+	/**
+	 * Instance of options handler.
+	 *
+	 * @var Options_Data
+	 */
+	private $options;
+
+	/**
+	 * Instantiate the class.
+	 *
+	 * @param Filesystem   $filesystem Filesystem Instance.
+	 * @param Options_Data $options    Options instance.
+	 */
+	public function __construct(
+		Filesystem $filesystem,
+		Options_Data $options
+	) {
+		$this->filesystem = $filesystem;
+		$this->options    = $options;
+	}
+
+	/**
+	 * Start the process of downloading font locally
+	 *
+	 * @param string  $font_url URL of the font to be saved locally.
+	 * @param string  $provider Provider of the font.
+	 * @param integer $version  Version.
+	 *
+	 * @return void
+	 */
+	public function process( string $font_url, string $provider, int $version ): void {
+		if ( ! $this->options->get( 'host_google_fonts' ) ) {
+			return;
+		}
+
+		$this->filesystem->set_version( $version );
+
+		$this->filesystem->write_font_css( $font_url, $provider );
+	}
+}

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

@@ -0,0 +1,51 @@
+<?php
+declare(strict_types=1);
+
+namespace WP_Rocket\Engine\Media\Fonts\Frontend;
+
+use WP_Rocket\Engine\Media\Fonts\Controller\Fonts;
+use WP_Rocket\Event_Management\Subscriber_Interface;
+
+class Subscriber implements Subscriber_Interface {
+	/**
+	 * Fonts instance
+	 *
+	 * @var Fonts
+	 */
+	private $fonts;
+
+	/**
+	 * Instantiate the class
+	 *
+	 * @param Fonts $fonts Fonts instance.
+	 */
+	public function __construct( Fonts $fonts ) {
+		$this->fonts = $fonts;
+	}
+
+	/**
+	 * Return an array of events that this subscriber wants to listen to.
+	 *
+	 * @since  3.18
+	 *
+	 * @return array
+	 */
+	public static function get_subscribed_events() {
+		return [
+			'rocket_host_google_fonts' => [ 'process', 15, 3 ],
+		];
+	}
+
+	/**
+	 * Save Fonts locally
+	 *
+	 * @param string  $font_url The url of the font.
+	 * @param string  $provider The font provider.
+	 * @param integer $version  The version of the font.
+	 *
+	 * @return void
+	 */
+	public function process( string $font_url, string $provider, int $version ): void {
+		$this->fonts->process( $font_url, $provider, $version );
+	}
+}

inc/Engine/Media/Fonts/ServiceProvider.php

@@ -0,0 +1,54 @@
+<?php
+
+declare(strict_types=1);
+
+namespace WP_Rocket\Engine\Media\Fonts;
+
+use WP_Rocket\Dependencies\League\Container\ServiceProvider\AbstractServiceProvider;
+use WP_Rocket\Engine\Media\Fonts\Frontend\Subscriber as FrontendSubscriber;
+use WP_Rocket\Engine\Media\Fonts\Controller\Fonts as FontsController;
+use WP_Rocket\Engine\Media\Fonts\Controller\Filesystem;
+
+/**
+ * Service provider for the WP Rocket Font Optimization
+ */
+class ServiceProvider extends AbstractServiceProvider {
+	/**
+	 * Array of services provided by this service provider
+	 *
+	 * @var array
+	 */
+	protected $provides = [
+		'fonts_frontend_subscriber',
+		'fonts_filesystem',
+	];
+
+	/**
+	 * Check if the service provider provides a specific service.
+	 *
+	 * @param string $id The id of the service.
+	 *
+	 * @return bool
+	 */
+	public function provides( string $id ): bool {
+		return in_array( $id, $this->provides, true );
+	}
+
+	/**
+	 * Registers the option array in the container
+	 *
+	 * @return void
+	 */
+	public function register(): void {
+		$this->getContainer()->add( 'fonts_filesystem', Filesystem::class )
+			->addArgument( rocket_get_constant( 'WP_ROCKET_FONT_CSS_PATH' ) )
+			->addArgument( rocket_direct_filesystem() );
+
+		$this->getContainer()->add( 'fonts_controller', FontsController::class )
+			->addArgument( $this->getContainer()->get( 'fonts_filesystem' ) )
+			->addArgument( $this->getContainer()->get( 'options' ) );
+
+		$this->getContainer()->addShared( 'fonts_frontend_subscriber', FrontendSubscriber::class )
+			->addArgument( $this->getContainer()->get( 'fonts_controller' ) );
+	}
+}