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ðŸ“„ class-block-frontend.php(16.7 KB)
ðŸ“„ class-css-handler.php(15.45 KB)
ðŸ“„ class-css-utility.php(10.56 KB)

Editing: class-css-handler.php

<?php
/**
 * Css handler.
 *
 * @package ThemeIsle\GutenbergBlocks\CSS
 */

namespace ThemeIsle\GutenbergBlocks\CSS;

use ThemeIsle\GutenbergBlocks\Base_CSS;

use ThemeIsle\GutenbergBlocks\Registration;
use tubalmartin\CssMin\Minifier as CSSmin;

/**
 * Class CSS_Handler
 */
class CSS_Handler extends Base_CSS {

/**
	 * The main instance var.
	 *
	 * @var CSS_Handler|null
	 */
	public static $instance = null;

/**
	 * Initialize the class
	 */
	public function init() {
		add_action( 'rest_api_init', array( $this, 'register_routes' ) );
		add_action( 'rest_api_init', array( $this, 'autoload_block_classes' ) );
		add_action( 'before_delete_post', array( __CLASS__, 'delete_css_file' ) );
		add_action( 'customize_save_after', array( $this, 'customize_save_after' ) );
		add_filter( 'customize_dynamic_partial_args', array( $this, 'customize_dynamic_partial_args' ), 10, 2 );
	}

/**
	 * Method used to register actively used widgets.
	 *
	 * @return void
	 */
	private function register_used_widgets() {
		$registration = Registration::instance();
		$widgets_used = $registration::$widget_used;
		if ( empty( $widgets_used ) ) {
			$sidebar_widgets = get_option( 'sidebars_widgets' );
			foreach ( $sidebar_widgets as $sidebar => $widgets ) {
				if ( 'wp_inactive_widgets' === $sidebar || ! is_array( $widgets ) ) {
					continue;
				}
				foreach ( $widgets as $widget ) {
					$widgets_used[] = $widget;
				}
			}
			$registration::$widget_used = $widgets_used;
		}
	}

/**
	 * Method used to add a filter for widget rendering before the partial is rendered.
	 *
	 * @param array  $partial_args Partial args.
	 * @param string $partial_id Partial ID.
	 *
	 * @return array
	 */
	public function customize_dynamic_partial_args( $partial_args, $partial_id ) {
		if ( preg_match( '/^widget\[(?P<widget_id>.+)\]$/', $partial_id, $matches ) ) {
			add_filter( 'widget_block_content', array( $this, 'customize_widget_block_content' ), 10, 3 );
		}

return $partial_args;
	}

/**
	 * Add inline styles for partially rendered block inside customizer.
	 *
	 * @param string     $block_content The block content.
	 * @param array      $block The block data.
	 * @param \WP_Widget $instance The widget instance.
	 *
	 * @return string
	 */
	public function customize_widget_block_content( $block_content, $block, $instance ) {
		$widget_data    = get_option( 'widget_block', array() );
		$partial_widget = (object) $widget_data[ $instance->number ];
		if ( ! isset( $widget_data[ $instance->number ] ) ) {
			return $block_content;
		}
		if ( ! $widget_data[ $instance->number ] ) {
			return $block_content;
		}

$content = $partial_widget->content;
		$blocks  = parse_blocks( $content );

if ( ! is_array( $blocks ) || empty( $blocks ) ) {
			return $block_content;
		}

$animations = boolval( preg_match( '/\banimated\b/', $content ) );
		$css        = $this->cycle_through_static_blocks( $blocks, $animations );

return '<style>.customize-previewing ' . $css . '</style>' . $block_content;
	}

/**
	 * Method after the customizer save is done.
	 *
	 * @return void
	 */
	public function customize_save_after() {
		$this->register_used_widgets();

$this->save_widgets_styles();
	}

/**
	 * Register REST API route
	 *
	 * @since   1.3.0
	 * @access  public
	 */
	public function register_routes() {
		$namespace = $this->namespace . $this->version;

register_rest_route(
			$namespace,
			'/post_styles/(?P<id>\d+)',
			array(
				array(
					'methods'             => \WP_REST_Server::EDITABLE,
					'callback'            => array( $this, 'save_post_meta' ),
					'args'                => array(
						'id' => array(
							'type'              => 'integer',
							'required'          => true,
							'description'       => __( 'ID of the Post.', 'otter-blocks' ),
							'validate_callback' => function ( $param, $request, $key ) {
								return is_numeric( $param );
							},
						),
					),
					'permission_callback' => function () {
						return current_user_can( 'publish_posts' );
					},
				),
			)
		);

register_rest_route(
			$namespace,
			'/block_styles/(?P<id>\d+)',
			array(
				array(
					'methods'             => \WP_REST_Server::EDITABLE,
					'callback'            => array( $this, 'save_block_meta' ),
					'args'                => array(
						'id' => array(
							'type'              => 'integer',
							'required'          => true,
							'description'       => __( 'ID of the Reusable Block.', 'otter-blocks' ),
							'validate_callback' => function ( $param, $request, $key ) {
								return is_numeric( $param );
							},
						),
					),
					'permission_callback' => function () {
						return current_user_can( 'publish_posts' );
					},
				),
			)
		);

register_rest_route(
			$namespace,
			'/widget_styles',
			array(
				array(
					'methods'             => \WP_REST_Server::EDITABLE,
					'callback'            => array( $this, 'save_widgets_styles_rest' ),
					'permission_callback' => function () {
						return current_user_can( 'edit_theme_options' );
					},
				),
			)
		);
	}

/**
	 * When in REST API context, autoload widgets used so that all css data is updated.
	 *
	 * @param \WP_REST_Request $request The request object.
	 *
	 * @return \WP_REST_Response | \WP_Error
	 */
	public function save_widgets_styles_rest( \WP_REST_Request $request ) {
		$this->register_used_widgets();

$response = $this->save_widgets_styles();
		if ( is_null( $response ) ) {
			$response = true;
		}
		return rest_ensure_response( $response );
	}

/**
	 * Function to save post CSS.
	 *
	 * @param \WP_REST_Request $request Rest request.
	 *
	 * @return mixed
	 * @since   1.3.0
	 * @access  public
	 */
	public function save_post_meta( \WP_REST_Request $request ) {
		if ( ! current_user_can( 'edit_posts' ) ) {
			return false;
		}

$post_id = $request->get_param( 'id' );
		self::generate_css_file( $post_id );

self::mark_review_block_metadata( $post_id );

return rest_ensure_response( array( 'message' => __( 'CSS updated.', 'otter-blocks' ) ) );
	}

/**
	 * Generate CSS file.
	 *
	 * @param int $post_id Post id.
	 */
	public static function generate_css_file( $post_id ) {
		$css = self::instance()->get_blocks_css( $post_id );
		self::save_css_file( $post_id, $css );
	}

/**
	 * Get CSS url for post.
	 *
	 * @param int|string $type Post ID or Widget.
	 *
	 * @return string|false File url.
	 */
	public static function get_css_url( $type = 'widgets' ) {
		$file_name = '';

if ( 'widgets' === $type ) {
			$file_name = get_option( 'themeisle_blocks_widgets_css_file' );
		} else {
			$file_name = get_post_meta( $type, '_themeisle_gutenberg_block_stylesheet', true );
		}

if ( empty( $file_name ) ) {
			return false;
		}

$wp_upload_dir = wp_upload_dir( null, false );
		$baseurl       = $wp_upload_dir['baseurl'] . '/themeisle-gutenberg/';

return $baseurl . $file_name . '.css';
	}

/**
	 * Check if we have a CSS file for this post.
	 *
	 * @param int|string $type Post ID or Widget.
	 *
	 * @return bool
	 */
	public static function has_css_file( $type = 'widgets' ) {
		$file_name = '';

if ( 'widgets' === $type ) {
			$file_name = get_option( 'themeisle_blocks_widgets_css_file' );
		} else {
			$file_name = get_post_meta( $type, '_themeisle_gutenberg_block_stylesheet', true );
		}

if ( empty( $file_name ) ) {
			return false;
		}

$wp_upload_dir = wp_upload_dir( null, false );
		$basedir       = $wp_upload_dir['basedir'] . '/themeisle-gutenberg/';
		$file_path     = $basedir . $file_name . '.css';

return is_file( $file_path );
	}

/**
	 * Function to save reusable block CSS.
	 *
	 * @param \WP_REST_Request $request Rest request.
	 *
	 * @return mixed
	 * @since   1.3.0
	 * @access  public
	 */
	public function save_block_meta( \WP_REST_Request $request ) {
		if ( ! current_user_can( 'edit_posts' ) ) {
			return false;
		}

$post_id = $request->get_param( 'id' );
		$css     = $this->get_reusable_block_css( $post_id );

self::save_css_file( $post_id, $css );

self::mark_review_block_metadata( $post_id );

return rest_ensure_response( array( 'message' => __( 'CSS updated.', 'otter-blocks' ) ) );
	}

/**
	 * Function to save CSS into WordPress Filesystem.
	 *
	 * @param int    $post_id Post id.
	 * @param string $css CSS string.
	 *
	 * @since   1.3.0
	 * @access  public
	 */
	public static function save_css_file( $post_id, $css ) {
		if ( empty( $css ) ) {
			return self::delete_css_file( $post_id );
		}

global $wp_filesystem;
		require_once ABSPATH . '/wp-admin/includes/file.php';
		WP_Filesystem();

$file_name     = 'post-v2-' . $post_id . '-' . time();
		$wp_upload_dir = wp_upload_dir( null, false );
		$upload_dir    = $wp_upload_dir['basedir'] . '/themeisle-gutenberg/';
		$file_path     = $upload_dir . $file_name . '.css';

$css = wp_filter_nohtml_kses( $css );

$css = self::compress( $css );

update_post_meta( $post_id, '_themeisle_gutenberg_block_styles', $css );

$existing_file      = get_post_meta( $post_id, '_themeisle_gutenberg_block_stylesheet', true );
		$existing_file_path = $upload_dir . $existing_file . '.css';

if ( $existing_file && is_file( $existing_file_path ) ) {
			self::delete_css_file( $post_id );
		}

if ( count( self::$google_fonts ) > 0 ) {
			update_post_meta( $post_id, '_themeisle_gutenberg_block_fonts', self::$google_fonts );
		} else {
			if ( get_post_meta( $post_id, '_themeisle_gutenberg_block_fonts', true ) ) {
				delete_post_meta( $post_id, '_themeisle_gutenberg_block_fonts' );
			}
		}

if ( self::is_writable() ) {
			$target_dir = $wp_filesystem->is_dir( $upload_dir );

if ( ! $wp_filesystem->is_writable( $wp_upload_dir['basedir'] ) ) {
				return false;
			}

if ( ! $target_dir ) {
				wp_mkdir_p( $upload_dir );
			}

$wp_filesystem->put_contents( $file_path, stripslashes( $css ), FS_CHMOD_FILE );

if ( file_exists( $file_path ) ) {
				update_post_meta( $post_id, '_themeisle_gutenberg_block_stylesheet', $file_name );
			}
		}
	}

/**
	 * Function to delete CSS from WordPress Filesystem.
	 *
	 * @param int $post_id Post id.
	 *
	 * @since   1.3.0
	 * @access  public
	 */
	public static function delete_css_file( $post_id ) {
		global $wp_filesystem;

if ( ! current_user_can( 'edit_posts' ) ) {
			return false;
		}

require_once ABSPATH . '/wp-admin/includes/file.php';
		WP_Filesystem();

$wp_upload_dir = wp_upload_dir( null, false );

if ( ! $wp_filesystem->is_writable( $wp_upload_dir['basedir'] ) ) {
			return;
		}

$file_name = get_post_meta( $post_id, '_themeisle_gutenberg_block_stylesheet', true );

if ( $file_name ) {
			delete_post_meta( $post_id, '_themeisle_gutenberg_block_stylesheet' );
		}

$upload_dir = $wp_upload_dir['basedir'] . '/themeisle-gutenberg/';
		$file_path  = $upload_dir . $file_name . '.css';

if ( ! file_exists( $file_path ) || ! self::is_writable() ) {
			return;
		}

$wp_filesystem->delete( $file_path, true );
	}

/**
	 * Function to save/resave widget styles.
	 *
	 * @since   1.7.0
	 * @access  public
	 */
	public static function save_widgets_styles() {
		global $wp_filesystem;
		require_once ABSPATH . '/wp-admin/includes/file.php';
		WP_Filesystem();

$css = self::instance()->get_widgets_css();

if ( empty( $css ) ) {
			$file_path = get_option( 'themeisle_blocks_widgets_css_file' );

if ( ! file_exists( $file_path ) ) {
				return false;
			}

delete_option( 'themeisle_blocks_widgets_css_file' );
			delete_option( 'themeisle_blocks_widgets_css' );

return $wp_filesystem->delete( $file_path, true );
		}

if ( count( self::$google_fonts ) > 0 ) {
			update_option( 'themeisle_blocks_widgets_fonts', self::$google_fonts );
		} else {
			if ( get_option( 'themeisle_blocks_widgets_fonts' ) ) {
				delete_option( 'themeisle_blocks_widgets_fonts' );
			}
		}

$file_name     = 'widgets-' . time();
		$wp_upload_dir = wp_upload_dir( null, false );
		$upload_dir    = $wp_upload_dir['basedir'] . '/themeisle-gutenberg/';
		$file_path     = $upload_dir . $file_name . '.css';

$css = wp_filter_nohtml_kses( $css );

$css = self::compress( $css );

update_option( 'themeisle_blocks_widgets_css', $css );

if ( self::is_writable() ) {
			$existing_file      = get_option( 'themeisle_blocks_widgets_css_file' );
			$existing_file_path = $upload_dir . $existing_file . '.css';

if ( $existing_file && is_file( $existing_file_path ) ) {
				$wp_filesystem->delete( $existing_file_path, true );
			}

$target_dir = $wp_filesystem->is_dir( $upload_dir );

if ( ! $wp_filesystem->is_writable( $wp_upload_dir['basedir'] ) ) {
				return false;
			}

if ( ! $target_dir ) {
				wp_mkdir_p( $upload_dir );
			}

$wp_filesystem->put_contents( $file_path, stripslashes( $css ), FS_CHMOD_FILE );

if ( file_exists( $file_path ) ) {
				update_option( 'themeisle_blocks_widgets_css_file', $file_name );
			}
		}
	}

/**
	 * Check if the path is writable.
	 *
	 * @return boolean
	 * @since   2.0.0
	 * @access  public
	 */
	public static function is_writable() {
		global $wp_filesystem;
		include_once ABSPATH . 'wp-admin/includes/file.php';
		WP_Filesystem();

$wp_upload_dir = wp_upload_dir( null, false );
		$upload_dir    = $wp_upload_dir['basedir'];

if ( ! function_exists( 'WP_Filesystem' ) ) {
			return false;
		}

$writable = WP_Filesystem( false, $upload_dir );

return $writable && 'direct' === $wp_filesystem->method;
	}

/**
	 * Compress CSS
	 *
	 * @param string $css Compress css.
	 *
	 * @return string Compressed css.
	 * @since   1.3.0
	 * @access  public
	 */
	public static function compress( $css ) {
		$compressor = new CSSmin();

// Override any PHP configuration options before calling run().
		$compressor->setMemoryLimit( '256M' );
		$compressor->setMaxExecutionTime( 120 );
		$compressor->setPcreBacktrackLimit( 3000000 );
		$compressor->setPcreRecursionLimit( 150000 );

$css = htmlspecialchars_decode( $css );
		$css = $compressor->run( $css );

return $css;
	}

/**
	 * Mark in post meta if the post has a review block.
	 *
	 * @param int $post_id Post ID.
	 * @since 2.4.0
	 * @access public
	 */
	public static function mark_review_block_metadata( $post_id ) {
		if ( empty( $post_id ) ) {
			return;
		}

$content     = get_the_content( '', false, $post_id );
		$saved_value = boolval( get_post_meta( $post_id, '_themeisle_gutenberg_block_has_review', true ) );

if ( empty( $content ) ) {

if ( true === $saved_value ) {
				delete_post_meta( $post_id, '_themeisle_gutenberg_block_has_review' );
			}

return;
		}

$has_review = false !== strpos( $content, '<!-- wp:themeisle-blocks/review' );

if ( $has_review !== $saved_value ) {
			update_post_meta( $post_id, '_themeisle_gutenberg_block_has_review', $has_review );
		}
	}

/**
	 * The instance method for the static class.
	 * Defines and returns the instance of the static class.
	 *
	 * @static
	 * @return CSS_Handler
	 * @since 1.3.0
	 * @access public
	 */
	public static function instance() {
		if ( is_null( self::$instance ) ) {
			self::$instance = new self();
			self::$instance->init();
		}

return self::$instance;
	}

/**
	 * Throw error on object clone
	 *
	 * The whole idea of the singleton design pattern is that there is a single
	 * object therefore, we don't want the object to be cloned.
	 *
	 * @access public
	 * @return void
	 * @since 1.3.0
	 */
	public function __clone() {
		// Cloning instances of the class is forbidden.
		_doing_it_wrong( __FUNCTION__, esc_html__( 'Cheatin&#8217; huh?', 'otter-blocks' ), '1.0.0' );
	}

/**
	 * Disable unserializing of the class
	 *
	 * @access public
	 * @return void
	 * @since 1.3.0
	 */
	public function __wakeup() {
		// Unserializing instances of the class is forbidden.
		_doing_it_wrong( __FUNCTION__, esc_html__( 'Cheatin&#8217; huh?', 'otter-blocks' ), '1.0.0' );
	}
}

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