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<?php |
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/** |
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* WordPress.com Block Editor |
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* Allow new block editor posts to be composed on WordPress.com. |
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* This is auto-loaded as of Jetpack v7.4 for sites connected to WordPress.com only. |
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* |
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* @package Jetpack |
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*/ |
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/** |
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* WordPress.com Block editor for Jetpack |
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*/ |
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class Jetpack_WPCOM_Block_Editor { |
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/** |
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* ID of the user who signed the nonce. |
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* |
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* @var int |
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*/ |
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private $nonce_user_id; |
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/** |
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* Singleton |
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*/ |
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public static function init() { |
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static $instance = false; |
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if ( ! $instance ) { |
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$instance = new Jetpack_WPCOM_Block_Editor(); |
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} |
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return $instance; |
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} |
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/** |
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* Jetpack_WPCOM_Block_Editor constructor. |
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*/ |
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private function __construct() { |
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if ( $this->is_iframed_block_editor() ) { |
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add_action( 'admin_init', array( $this, 'disable_send_frame_options_header' ), 9 ); |
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add_filter( 'admin_body_class', array( $this, 'add_iframed_body_class' ) ); |
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} |
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add_action( 'login_init', array( $this, 'allow_block_editor_login' ), 1 ); |
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add_action( 'enqueue_block_editor_assets', array( $this, 'enqueue_scripts' ) ); |
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add_filter( 'mce_external_plugins', array( $this, 'add_tinymce_plugins' ) ); |
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} |
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/** |
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* Checks if we are embedding the block editor in an iframe in WordPress.com. |
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* |
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* @return bool Whether the current request is from the iframed block editor. |
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*/ |
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public function is_iframed_block_editor() { |
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global $pagenow; |
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// phpcs:ignore WordPress.Security.NonceVerification |
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return ( 'post.php' === $pagenow || 'post-new.php' === $pagenow ) && ! empty( $_GET['frame-nonce'] ); |
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} |
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/** |
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* Prevents frame options header from firing if this is a whitelisted iframe request. |
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*/ |
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public function disable_send_frame_options_header() { |
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// phpcs:ignore WordPress.Security.NonceVerification |
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if ( $this->framing_allowed( $_GET['frame-nonce'] ) ) { |
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remove_action( 'admin_init', 'send_frame_options_header' ); |
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} |
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} |
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/** |
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* Adds custom admin body class if this is a whitelisted iframe request. |
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* |
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* @param string $classes Admin body classes. |
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* @return string |
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*/ |
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public function add_iframed_body_class( $classes ) { |
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// phpcs:ignore WordPress.Security.NonceVerification |
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if ( $this->framing_allowed( $_GET['frame-nonce'] ) ) { |
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$classes .= ' is-iframed '; |
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} |
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return $classes; |
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} |
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/** |
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* Allows to iframe the login page if a user is logged out |
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* while trying to access the block editor from wordpress.com. |
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*/ |
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public function allow_block_editor_login() { |
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// phpcs:ignore WordPress.Security.NonceVerification |
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if ( empty( $_REQUEST['redirect_to'] ) ) { |
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return; |
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} |
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// phpcs:ignore WordPress.Security.NonceVerification |
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$query = wp_parse_url( urldecode( $_REQUEST['redirect_to'] ), PHP_URL_QUERY ); |
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$args = wp_parse_args( $query ); |
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// Check nonce and make sure this is a Gutenframe request. |
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if ( ! empty( $args['frame-nonce'] ) && $this->framing_allowed( $args['frame-nonce'] ) ) { |
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// If SSO is active, we'll let WordPress.com handle authentication... |
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if ( Jetpack::is_module_active( 'sso' ) ) { |
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// ...but only if it's not an Atomic site. They already do that. |
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if ( ! jetpack_is_atomic_site() ) { |
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add_filter( 'jetpack_sso_bypass_login_forward_wpcom', '__return_true' ); |
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} |
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} else { |
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$_REQUEST['interim-login'] = true; |
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add_action( 'wp_login', array( $this, 'do_redirect' ) ); |
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add_action( 'login_form', array( $this, 'add_login_html' ) ); |
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add_filter( 'wp_login_errors', array( $this, 'add_login_message' ) ); |
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remove_action( 'login_init', 'send_frame_options_header' ); |
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wp_add_inline_style( 'login', '.interim-login #login{padding-top:8%}' ); |
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} |
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} |
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} |
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/** |
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* Adds a login message. |
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* |
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* Intended to soften the expectation mismatch of ending up with a login screen rather than the editor. |
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* |
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* @param WP_Error $errors WP Error object. |
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* @return \WP_Error |
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*/ |
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public function add_login_message( $errors ) { |
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$errors->remove( 'expired' ); |
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$errors->add( 'info', __( 'Before we continue, please log in to your Jetpack site.', 'jetpack' ), 'message' ); |
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return $errors; |
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} |
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/** |
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* Maintains the `redirect_to` parameter in login form links. |
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* Adds visual feedback of login in progress. |
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*/ |
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public function add_login_html() { |
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?> |
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<input type="hidden" name="redirect_to" value="<?php echo esc_url( $_REQUEST['redirect_to'] ); ?>" /> |
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<script type="application/javascript"> |
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document.getElementById( 'loginform' ).addEventListener( 'submit' , function() { |
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document.getElementById( 'wp-submit' ).setAttribute( 'disabled', 'disabled' ); |
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document.getElementById( 'wp-submit' ).value = '<?php echo esc_js( __( 'Logging In...', 'jetpack' ) ); ?>'; |
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} ); |
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</script> |
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<?php |
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} |
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/** |
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* Does the redirect to the block editor. |
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*/ |
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public function do_redirect() { |
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wp_redirect( $GLOBALS['redirect_to'] ); |
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exit; |
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} |
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/** |
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* Checks whether this is a whitelisted iframe request. |
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* |
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* @param string $nonce Nonce to verify. |
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* @return bool |
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*/ |
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public function framing_allowed( $nonce ) { |
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$verified = $this->verify_frame_nonce( $nonce, 'frame-' . Jetpack_Options::get_option( 'id' ) ); |
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if ( is_wp_error( $verified ) ) { |
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wp_die( $verified ); // phpcs:ignore WordPress.Security.EscapeOutput.OutputNotEscaped |
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} |
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if ( $verified && ! defined( 'IFRAME_REQUEST' ) ) { |
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define( 'IFRAME_REQUEST', true ); |
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} |
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return (bool) $verified; |
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} |
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/** |
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* Verify that correct nonce was used with time limit. |
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* |
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* The user is given an amount of time to use the token, so therefore, since the |
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* UID and $action remain the same, the independent variable is the time. |
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* |
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* @param string $nonce Nonce that was used in the form to verify. |
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* @param string $action Should give context to what is taking place and be the same when nonce was created. |
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* @return boolean|WP_Error Whether the nonce is valid. |
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*/ |
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public function verify_frame_nonce( $nonce, $action ) { |
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if ( empty( $nonce ) ) { |
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return false; |
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} |
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list( $expiration, $user_id, $hash ) = explode( ':', $nonce, 3 ); |
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$this->nonce_user_id = (int) $user_id; |
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if ( ! $this->nonce_user_id ) { |
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return false; |
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} |
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$token = Jetpack_Data::get_access_token( $this->nonce_user_id ); |
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if ( ! $token ) { |
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return false; |
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} |
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/* |
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* Failures must return `false` (blocking the iframe) prior to the |
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* signature verification. |
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*/ |
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add_filter( 'salt', array( $this, 'filter_salt' ), 10, 2 ); |
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$expected_hash = wp_hash( "$expiration|$action|{$this->nonce_user_id}", 'jetpack_frame_nonce' ); |
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remove_filter( 'salt', array( $this, 'filter_salt' ) ); |
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if ( ! hash_equals( $hash, $expected_hash ) ) { |
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return false; |
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} |
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/* |
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* Failures may return `WP_Error` (showing an error in the iframe) after the |
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* signature verification passes. |
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*/ |
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if ( time() > $expiration ) { |
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return new WP_Error( 'nonce_invalid_expired', 'Expired nonce.', array( 'status' => 401 ) ); |
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} |
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// Check if it matches the current user, unless they're trying to log in. |
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if ( get_current_user_id() !== $this->nonce_user_id && ! doing_action( 'login_init' ) ) { |
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return new WP_Error( 'nonce_invalid_user_mismatch', 'User ID mismatch.', array( 'status' => 401 ) ); |
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} |
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return true; |
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} |
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/** |
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* Filters the WordPress salt. |
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* |
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* @param string $salt Salt for the given scheme. |
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* @param string $scheme Authentication scheme. |
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* @return string |
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*/ |
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public function filter_salt( $salt, $scheme ) { |
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if ( 'jetpack_frame_nonce' === $scheme ) { |
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$token = Jetpack_Data::get_access_token( $this->nonce_user_id ); |
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if ( $token ) { |
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$salt = $token->secret; |
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} |
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} |
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return $salt; |
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} |
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/** |
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* Enqueue the scripts for the WordPress.com block editor integration. |
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*/ |
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public function enqueue_scripts() { |
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$debug = defined( 'SCRIPT_DEBUG' ) && SCRIPT_DEBUG; |
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$version = gmdate( 'Ymd' ); |
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$src_common = $debug |
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? '//widgets.wp.com/wpcom-block-editor/common.js?minify=false' |
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: '//widgets.wp.com/wpcom-block-editor/common.min.js'; |
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wp_enqueue_script( |
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'wpcom-block-editor-common', |
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$src_common, |
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array( 'lodash', 'wp-compose', 'wp-data', 'wp-editor', 'wp-rich-text' ), |
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$version, |
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true |
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); |
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wp_localize_script( |
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'wpcom-block-editor-common', |
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'wpcomGutenberg', |
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array( |
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'switchToClassic' => array( |
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'isVisible' => $this->is_iframed_block_editor(), |
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'label' => __( 'Switch to Classic Editor', 'jetpack' ), |
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'url' => Jetpack_Calypsoify::getInstance()->get_switch_to_classic_editor_url(), |
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), |
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'richTextToolbar' => array( |
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'justify' => __( 'Justify', 'jetpack' ), |
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'underline' => __( 'Underline', 'jetpack' ), |
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), |
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) |
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); |
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$src_styles = $debug |
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? '//widgets.wp.com/wpcom-block-editor/common.css?minify=false' |
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: '//widgets.wp.com/wpcom-block-editor/common.min.css'; |
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wp_enqueue_style( |
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'wpcom-block-editor-styles', |
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$src_styles, |
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array(), |
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$version |
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); |
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if ( $this->is_iframed_block_editor() ) { |
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$src_calypso_iframe_bridge = $debug |
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? '//widgets.wp.com/wpcom-block-editor/calypso-iframe-bridge-server.js?minify=false' |
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: '//widgets.wp.com/wpcom-block-editor/calypso-iframe-bridge-server.min.js'; |
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wp_enqueue_script( |
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'wpcom-block-editor-calypso-iframe-bridge', |
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$src_calypso_iframe_bridge, |
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array( 'calypsoify_wpadminmods_js', 'jquery', 'lodash', 'react', 'wp-blocks', 'wp-data', 'wp-hooks', 'wp-tinymce', 'wp-url' ), |
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$version, |
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true |
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); |
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} |
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} |
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/** |
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* Register the Tiny MCE plugins for the WordPress.com block editor integration. |
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* |
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* @param array $plugin_array An array of external Tiny MCE plugins. |
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* @return array External TinyMCE plugins. |
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*/ |
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public function add_tinymce_plugins( $plugin_array ) { |
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if ( $this->is_iframed_block_editor() ) { |
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$debug = defined( 'SCRIPT_DEBUG' ) && SCRIPT_DEBUG; |
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$src_calypso_tinymce = $debug |
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? '//widgets.wp.com/wpcom-block-editor/calypso-tinymce.js?minify=false' |
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: '//widgets.wp.com/wpcom-block-editor/calypso-tinymce.min.js'; |
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$plugin_array['gutenberg-wpcom-iframe-media-modal'] = add_query_arg( |
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'v', |
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gmdate( 'YW' ), |
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$src_calypso_tinymce |
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); |
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} |
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return $plugin_array; |
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} |
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} |
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Jetpack_WPCOM_Block_Editor::init(); |
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It seems like the type of the argument is not accepted by the function/method which you are calling.
In some cases, in particular if PHP’s automatic type-juggling kicks in this might be fine. In other cases, however this might be a bug.
We suggest to add an explicit type cast like in the following example: