mirror of
https://git.sindominio.net/estibadores/wordpress.git
synced 2024-11-23 02:51:06 +01:00
118 lines
2.7 KiB
PHP
118 lines
2.7 KiB
PHP
<?php
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/**
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* Allows viewing posts on the frontend when the user is not logged in.
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*/
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class Jetpack_Frame_Nonce_Preview {
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static $instance = null;
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/**
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* Returns the single instance of the Jetpack_Frame_Nonce_Preview object
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*
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* @since 4.3.0
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*
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* @return Jetpack_Frame_Nonce_Preview
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**/
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public static function get_instance() {
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if ( ! is_null( self::$instance ) ) {
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return self::$instance;
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}
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return self::$instance = new Jetpack_Frame_Nonce_Preview();
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}
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function __construct() {
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if ( isset( $_GET['frame-nonce'] ) && ! is_admin() ) {
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add_filter( 'pre_get_posts', array( $this, 'maybe_display_post' ) );
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}
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// autosave previews are validated differently
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if ( isset( $_GET['frame-nonce'] ) && isset( $_GET['preview_id'] ) && isset( $_GET['preview_nonce'] ) ) {
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remove_action( 'init', '_show_post_preview' );
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add_action( 'init', array( $this, 'handle_autosave_nonce_validation' ) );
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}
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}
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/**
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* Verify that frame nonce exists, and if so, validate the nonce by calling WP.com.
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*
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* @since 4.3.0
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*
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* @return bool
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*/
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public function is_frame_nonce_valid() {
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if ( empty( $_GET['frame-nonce'] ) ) {
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return false;
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}
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$xml = new Jetpack_IXR_Client();
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$xml->query( 'jetpack.verifyFrameNonce', sanitize_key( $_GET['frame-nonce'] ) );
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if ( $xml->isError() ) {
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return false;
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}
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return (bool) $xml->getResponse();
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}
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/**
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* Conditionally add a hook on posts_results if this is the main query, a preview, and singular.
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*
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* @since 4.3.0
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*
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* @param WP_Query $query
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*
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* @return WP_Query
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*/
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public function maybe_display_post( $query ) {
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if (
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$query->is_main_query() &&
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$query->is_preview() &&
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$query->is_singular()
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) {
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add_filter( 'posts_results', array( $this, 'set_post_to_publish' ), 10, 2 );
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}
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return $query;
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}
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/**
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* Conditionally set the first post to 'publish' if the frame nonce is valid and there is a post.
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*
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* @since 4.3.0
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*
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* @param array $posts
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*
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* @return array
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*/
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public function set_post_to_publish( $posts ) {
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remove_filter( 'posts_results', array( $this, 'set_post_to_publish' ), 10, 2 );
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if ( empty( $posts ) || is_user_logged_in() || ! $this->is_frame_nonce_valid() ) {
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return $posts;
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}
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$posts[0]->post_status = 'publish';
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// Disable comments and pings for this post.
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add_filter( 'comments_open', '__return_false' );
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add_filter( 'pings_open', '__return_false' );
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return $posts;
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}
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/**
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* Handle validation for autosave preview request
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*
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* @since 4.7.0
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*/
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public function handle_autosave_nonce_validation() {
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if ( ! $this->is_frame_nonce_valid() ) {
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wp_die( __( 'Sorry, you are not allowed to preview drafts.', 'jetpack' ) );
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}
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add_filter( 'the_preview', '_set_preview' );
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}
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}
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Jetpack_Frame_Nonce_Preview::get_instance();
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