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Editing: easy-markdown.php
<?php //phpcs:ignore WordPress.Files.FileName.InvalidClassFileName /** * Plugin URI: https://automattic.com/ * Plugin Name: Easy Markdown * Description: Write in Markdown, publish in WordPress * Version: 0.1 * Author: Matt Wiebe * Author URI: https://automattic.com/ * Text Domain: jetpack * * @package automattic/jetpack */ /** * Copyright (c) Automattic. All rights reserved. * * Released under the GPL license * https://www.opensource.org/licenses/gpl-license.php * * This is an add-on for WordPress * https://wordpress.org/ * * ********************************************************************** * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * ********************************************************************** */ if ( ! defined( 'ABSPATH' ) ) { exit( 0 ); } /** * WPCom_Markdown class. */ class WPCom_Markdown { const POST_OPTION = 'wpcom_publish_posts_with_markdown'; const COMMENT_OPTION = 'wpcom_publish_comments_with_markdown'; const POST_TYPE_SUPPORT = 'wpcom-markdown'; const IS_MD_META = '_wpcom_is_markdown'; /** * Our markdown parser. * * @var WPCom_GHF_Markdown_Parser */ private static $parser; /** * An instance of the markdown class. * * @var WPCom_Markdown */ private static $instance; /** * To ensure that our munged posts over xml-rpc are removed from the cache. * * @var array */ public $posts_to_uncache = array(); /** * Posts and parents to monitor. * * @var array */ private $monitoring = array( 'post' => array(), 'parent' => array(), ); /** * Whether or not kses filters were removed. Only set if removal was attempted. * * @var ?bool */ public $kses; /** * Yay singletons! * * @return object WPCom_Markdown instance */ public static function get_instance() { if ( ! self::$instance ) { self::$instance = new self(); } return self::$instance; } /** * Kicks things off on `init` action */ public function load() { $this->add_default_post_type_support(); $this->maybe_load_actions_and_filters(); if ( defined( 'REST_API_REQUEST' ) && REST_API_REQUEST ) { // phpcs:ignore WPCUT.SwitchBlog.SwitchBlog -- wpcom flags **every** use of switch_blog, apparently expecting valid instances to ignore or suppress the sniff. add_action( 'switch_blog', array( $this, 'maybe_load_actions_and_filters' ), 10, 2 ); } add_action( 'admin_init', array( $this, 'register_setting' ) ); add_action( 'admin_init', array( $this, 'maybe_unload_for_bulk_edit' ) ); if ( current_theme_supports( 'o2' ) || class_exists( 'P2' ) ) { $this->add_o2_helpers(); } } /** * If we're in a bulk edit session, unload so that we don't lose our markdown metadata */ public function maybe_unload_for_bulk_edit() { if ( isset( $_REQUEST['bulk_edit'] ) && $this->is_posting_enabled() ) { // phpcs:ignore WordPress.Security.NonceVerification.Recommended $this->unload_markdown_for_posts(); } } /** * Called on init and fires on switch_blog to decide if our actions and filters * should be running. * * @param int|null $new_blog_id New blog ID. * @param int|null $old_blog_id Old blog ID. * @return null */ public function maybe_load_actions_and_filters( $new_blog_id = null, $old_blog_id = null ) { // When WP sites are being installed, the options table is not available yet. if ( function_exists( 'wp_installing' ) && wp_installing() ) { return; } // If this is a switch_to_blog call, and the blog isn't changing, we'll already be loaded. if ( $new_blog_id && $new_blog_id === $old_blog_id ) { return; } if ( $this->is_posting_enabled() ) { $this->load_markdown_for_posts(); } else { $this->unload_markdown_for_posts(); } if ( $this->is_commenting_enabled() ) { $this->load_markdown_for_comments(); } else { $this->unload_markdown_for_comments(); } } /** * Set up hooks for enabling Markdown conversion on posts */ public function load_markdown_for_posts() { add_filter( 'wp_kses_allowed_html', array( $this, 'wp_kses_allowed_html' ), 10, 2 ); add_action( 'after_wp_tiny_mce', array( $this, 'after_wp_tiny_mce' ) ); add_action( 'wp_insert_post', array( $this, 'wp_insert_post' ) ); add_filter( 'wp_insert_post_data', array( $this, 'wp_insert_post_data' ), 10, 2 ); add_filter( 'edit_post_content', array( $this, 'edit_post_content' ), 10, 2 ); add_filter( 'edit_post_content_filtered', array( $this, 'edit_post_content_filtered' ), 10, 2 ); add_action( 'wp_restore_post_revision', array( $this, 'wp_restore_post_revision' ), 10, 2 ); add_filter( '_wp_post_revision_fields', array( $this, 'wp_post_revision_fields' ) ); add_action( 'xmlrpc_call', array( $this, 'xmlrpc_actions' ) ); add_filter( 'content_save_pre', array( $this, 'preserve_code_blocks' ), 1 ); if ( defined( 'XMLRPC_REQUEST' ) && XMLRPC_REQUEST ) { $this->check_for_early_methods(); } } /** * Removes hooks to disable Markdown conversion on posts */ public function unload_markdown_for_posts() { remove_filter( 'wp_kses_allowed_html', array( $this, 'wp_kses_allowed_html' ) ); remove_action( 'after_wp_tiny_mce', array( $this, 'after_wp_tiny_mce' ) ); remove_action( 'wp_insert_post', array( $this, 'wp_insert_post' ) ); remove_filter( 'wp_insert_post_data', array( $this, 'wp_insert_post_data' ), 10 ); remove_filter( 'edit_post_content', array( $this, 'edit_post_content' ), 10 ); remove_filter( 'edit_post_content_filtered', array( $this, 'edit_post_content_filtered' ), 10 ); remove_action( 'wp_restore_post_revision', array( $this, 'wp_restore_post_revision' ), 10 ); remove_filter( '_wp_post_revision_fields', array( $this, 'wp_post_revision_fields' ) ); remove_action( 'xmlrpc_call', array( $this, 'xmlrpc_actions' ) ); remove_filter( 'content_save_pre', array( $this, 'preserve_code_blocks' ), 1 ); } /** * Set up hooks for enabling Markdown conversion on comments */ protected function load_markdown_for_comments() { // Use priority 9 so that Markdown runs before KSES, which can clean up // any munged HTML. add_filter( 'pre_comment_content', array( $this, 'pre_comment_content' ), 9 ); } /** * Removes hooks to disable Markdown conversion */ protected function unload_markdown_for_comments() { remove_filter( 'pre_comment_content', array( $this, 'pre_comment_content' ), 9 ); } /** * The o2 plugin does some of what we do. Let's take precedence. */ public function add_o2_helpers() { if ( $this->is_posting_enabled() ) { add_filter( 'content_save_pre', array( $this, 'o2_escape_lists' ), 1 ); } add_filter( 'o2_preview_post', array( $this, 'o2_preview_post' ) ); add_filter( 'o2_preview_comment', array( $this, 'o2_preview_comment' ) ); add_filter( 'wpcom_markdown_transform_pre', array( $this, 'o2_unescape_lists' ) ); add_filter( 'wpcom_untransformed_content', array( $this, 'o2_unescape_lists' ) ); } /** * If Markdown is enabled for posts on this blog, filter the text for o2 previews * * @param string $text Post text. * @return string Post text transformed through the magic of Markdown */ public function o2_preview_post( $text ) { if ( $this->is_posting_enabled() ) { $text = $this->transform( $text, array( 'unslash' => false ) ); } return $text; } /** * If Markdown is enabled for comments on this blog, filter the text for o2 previews * * @param string $text Comment text. * @return string Comment text transformed through the magic of Markdown */ public function o2_preview_comment( $text ) { if ( $this->is_commenting_enabled() ) { $text = $this->transform( $text, array( 'unslash' => false ) ); } return $text; } /** * Escapes lists so that o2 doesn't trounce them * * @param string $text Post/comment text. * @return string Text escaped with HTML entity for asterisk. */ public function o2_escape_lists( $text ) { return preg_replace( '/^\\* /um', '* ', $text ); } /** * Unescapes the token we inserted on o2_escape_lists * * @param string $text Post/comment text with HTML entities for asterisks. * @return string Text with the HTML entity removed */ public function o2_unescape_lists( $text ) { return preg_replace( '/^[&]\#042; /um', '* ', $text ); } /** * Preserve code blocks from being munged by KSES before they have a chance * * @param string $text post content. * @return string post content with code blocks escaped. */ public function preserve_code_blocks( $text ) { return $this->get_parser()->codeblock_preserve( $text ); } /** * Remove KSES if it's there. Store the result to manually invoke later if needed. */ public function maybe_remove_kses() { // Filters return true if they existed before you removed them. if ( $this->is_posting_enabled() ) { $this->kses = remove_filter( 'content_filtered_save_pre', 'wp_filter_post_kses' ) && remove_filter( 'content_save_pre', 'wp_filter_post_kses' ); } } /** * Add our Writing and Discussion settings. */ public function register_setting() { add_settings_field( self::POST_OPTION, __( 'Markdown', 'jetpack' ), array( $this, 'post_field' ), 'writing' ); register_setting( 'writing', self::POST_OPTION, array( $this, 'sanitize_setting' ) ); add_settings_field( self::COMMENT_OPTION, __( 'Markdown', 'jetpack' ), array( $this, 'comment_field' ), 'discussion' ); register_setting( 'discussion', self::COMMENT_OPTION, array( $this, 'sanitize_setting' ) ); } /** * Sanitize setting. Don't really want to store "on" value, so we'll store "1" instead! * * @param string $input Value received by settings API via $_POST. * @return bool Cast to boolean. */ public function sanitize_setting( $input ) { return (bool) $input; } /** * Prints HTML for the Writing setting */ public function post_field() { printf( '<label><input name="%1$s" id="%1$s" type="checkbox"%2$s /> %3$s</label><p class="description">%4$s</p>', esc_attr( self::POST_OPTION ), checked( $this->is_posting_enabled(), true, false ), esc_html__( 'Use Markdown for posts and pages.', 'jetpack' ), sprintf( '<a href="%s" data-target="wpcom-help-center">%s</a>', esc_url( $this->get_support_url() ), esc_html__( 'Learn more about Markdown.', 'jetpack' ) ) ); } /** * Prints HTML for the Discussion setting */ public function comment_field() { printf( '<label><input name="%1$s" id="%1$s" type="checkbox"%2$s /> %3$s</label><p class="description">%4$s</p>', esc_attr( self::COMMENT_OPTION ), checked( $this->is_commenting_enabled(), true, false ), esc_html__( 'Use Markdown for comments.', 'jetpack' ), sprintf( '<a href="%s" data-target="wpcom-help-center">%s</a>', esc_url( $this->get_support_url() ), esc_html__( 'Learn more about Markdown.', 'jetpack' ) ) ); } /** * Get the support url for Markdown * * @uses apply_filters * @return string support url */ protected function get_support_url() { /** * Filter the Markdown support URL. * * @module markdown * * @since 2.8.0 * * @param string $url Markdown support URL. */ return apply_filters( 'easy_markdown_support_url', 'https://en.support.wordpress.com/markdown-quick-reference/' ); } /** * Is Mardown conversion for posts enabled? * * @return boolean */ public function is_posting_enabled() { return (bool) Jetpack_Options::get_option_and_ensure_autoload( self::POST_OPTION, '' ); } /** * Is Markdown conversion for comments enabled? * * @return boolean */ public function is_commenting_enabled() { return (bool) Jetpack_Options::get_option_and_ensure_autoload( self::COMMENT_OPTION, '' ); } /** * Check if a $post_id has Markdown enabled * * @param int $post_id A post ID. * @return boolean */ public function is_markdown( $post_id ) { return get_metadata( 'post', $post_id, self::IS_MD_META, true ); } /** * Set Markdown as enabled on a post_id. We skip over update_postmeta so we * can sneakily set metadata on post revisions, which we need. * * @param int $post_id A post ID. * @return bool The metadata was successfully set. */ protected function set_as_markdown( $post_id ) { return update_metadata( 'post', $post_id, self::IS_MD_META, true ); } /** * Get our Markdown parser object, optionally requiring all of our needed classes and * instantiating our parser. * * @return object WPCom_GHF_Markdown_Parser instance. */ public function get_parser() { if ( ! self::$parser ) { require_once JETPACK__PLUGIN_DIR . '/_inc/lib/markdown.php'; self::$parser = new WPCom_GHF_Markdown_Parser(); } return self::$parser; } /** * We don't want Markdown conversion all over the place. */ public function add_default_post_type_support() { add_post_type_support( 'post', self::POST_TYPE_SUPPORT ); add_post_type_support( 'page', self::POST_TYPE_SUPPORT ); add_post_type_support( 'revision', self::POST_TYPE_SUPPORT ); } /** * Figure out the post type of the post screen we're on * * @deprecated since 10.8 * @return string Current post_type */ protected function get_post_screen_post_type() { _deprecated_function( __METHOD__, 'jetpack-10.8', '' ); global $pagenow; $post_type = filter_input( INPUT_GET, 'post_type', FILTER_UNSAFE_RAW ); $post_id = filter_input( INPUT_GET, 'post', FILTER_SANITIZE_NUMBER_INT ); if ( 'post-new.php' === $pagenow ) { return ! empty( $post_type ) ? $post_type : 'post'; } if ( $post_id ) { $post_type = get_post_type( $post_id ); } return ! empty( $post_type ) ? $post_type : 'post'; } /** * Swap post_content and post_content_filtered for editing * * @param string $content Post content. * @param int $id post ID. * @return string Swapped content */ public function edit_post_content( $content, $id ) { if ( $this->is_markdown( $id ) ) { $post = get_post( $id ); if ( $post && ! empty( $post->post_content_filtered ) ) { $post = $this->swap_for_editing( $post ); return $post->post_content; } } return $content; } /** * Swap post_content_filtered and post_content for editing * * @param string $content Post content_filtered. * @param int $id post ID. * @return string Swapped content */ public function edit_post_content_filtered( $content, $id ) { // if markdown was disabled, let's turn this off. if ( ! $this->is_posting_enabled() && $this->is_markdown( $id ) ) { $post = get_post( $id ); if ( $post && ! empty( $post->post_content_filtered ) ) { $content = ''; } } return $content; } /** * Some tags are allowed to have a 'markdown' attribute, allowing them to contain Markdown. * We need to tell KSES about those tags. * * @param array $tags List of tags that KSES allows. * @param string $context The context that KSES is allowing these tags. * @return array The tags that KSES allows, with our extra 'markdown' parameter where necessary. */ public function wp_kses_allowed_html( $tags, $context ) { if ( 'post' !== $context ) { return $tags; } $re = '/' . $this->get_parser()->contain_span_tags_re . '/'; foreach ( $tags as $tag => $attributes ) { // In case other filters have changed the value to a non-array, we skip it. if ( ! is_array( $attributes ) ) { continue; } if ( preg_match( $re, $tag ) ) { $attributes['markdown'] = true; $tags[ $tag ] = $attributes; } } return $tags; } /** * TinyMCE needs to know not to strip the 'markdown' attribute. Unfortunately, it doesn't * really offer a nice API for allowed attributes, so we have to manually add it * to the schema instead. */ public function after_wp_tiny_mce() { ?> <script type="text/javascript"> jQuery( function() { ( 'undefined' !== typeof tinymce ) && tinymce.on( 'AddEditor', function( event ) { event.editor.on( 'BeforeSetContent', function( event ) { var editor = event.target; Object.keys( editor.schema.elements ).forEach( function( key, index ) { editor.schema.elements[ key ].attributes['markdown'] = {}; editor.schema.elements[ key ].attributesOrder.push( 'markdown' ); } ); } ); }, true ); } ); </script> <?php } /** * Magic happens here. Markdown is converted and stored on post_content. Original Markdown is stored * in post_content_filtered so that we can continue editing as Markdown. * * @param array $post_data The post data that will be inserted into the DB. Slashed. * @param array $postarr All the stuff that was in $_POST. * @return array $post_data with post_content and post_content_filtered modified */ public function wp_insert_post_data( $post_data, $postarr ) { // $post_data array is slashed! $post_id = isset( $postarr['ID'] ) ? $postarr['ID'] : false; // bail early if markdown is disabled or this post type is unsupported. if ( ! $this->is_posting_enabled() || ! post_type_supports( $post_data['post_type'], self::POST_TYPE_SUPPORT ) ) { // it's disabled, but maybe this *was* a markdown post before. if ( $this->is_markdown( $post_id ) && ! empty( $post_data['post_content_filtered'] ) ) { $post_data['post_content_filtered'] = ''; } // we have no context to determine supported post types in the `post_content_pre` hook, // which already ran to sanitize code blocks. Undo that. $post_data['post_content'] = $this->get_parser()->codeblock_restore( $post_data['post_content'] ); return $post_data; } // rejigger post_content and post_content_filtered // revisions are already in the right place, except when we're restoring, but that's taken care of elsewhere // also prevent quick edit feature from overriding already-saved markdown (issue https://github.com/Automattic/jetpack/issues/636). if ( 'revision' !== $post_data['post_type'] && ! isset( $_POST['_inline_edit'] ) ) { // phpcs:ignore WordPress.Security.NonceVerification.Missing /** * Filter the original post content passed to Markdown. * * @module markdown * * @since 2.8.0 * * @param string $post_data['post_content'] Untransformed post content. */ $post_data['post_content_filtered'] = apply_filters( 'wpcom_untransformed_content', $post_data['post_content'] ); $post_data['post_content'] = $this->transform( $post_data['post_content'], array( 'id' => $post_id ) ); /** This filter is already documented in core/wp-includes/default-filters.php */ $post_data['post_content'] = apply_filters( 'content_save_pre', $post_data['post_content'] ); } elseif ( str_starts_with( $post_data['post_name'], $post_data['post_parent'] . '-autosave' ) ) { // autosaves for previews are weird. /** This filter is already documented in modules/markdown/easy-markdown.php */ $post_data['post_content_filtered'] = apply_filters( 'wpcom_untransformed_content', $post_data['post_content'] ); $post_data['post_content'] = $this->transform( $post_data['post_content'], array( 'id' => $post_data['post_parent'] ) ); /** This filter is already documented in core/wp-includes/default-filters.php */ $post_data['post_content'] = apply_filters( 'content_save_pre', $post_data['post_content'] ); } // set as markdown on the wp_insert_post hook later. if ( $post_id ) { $this->monitoring['post'][ $post_id ] = true; } else { $this->monitoring['content'] = wp_unslash( $post_data['post_content'] ); } if ( 'revision' === $postarr['post_type'] && $this->is_markdown( $postarr['post_parent'] ) ) { $this->monitoring['parent'][ $postarr['post_parent'] ] = true; } return $post_data; } /** * Calls on wp_insert_post action, after wp_insert_post_data. This way we can * still set postmeta on our revisions after it's all been deleted. * * @param int $post_id The post ID that has just been added/updated. */ public function wp_insert_post( $post_id ) { $post_parent = get_post_field( 'post_parent', $post_id ); // this didn't have an ID yet. Compare the content that was just saved. if ( isset( $this->monitoring['content'] ) && get_post_field( 'post_content', $post_id ) === $this->monitoring['content'] ) { unset( $this->monitoring['content'] ); $this->set_as_markdown( $post_id ); } if ( isset( $this->monitoring['post'][ $post_id ] ) ) { unset( $this->monitoring['post'][ $post_id ] ); $this->set_as_markdown( $post_id ); } elseif ( isset( $this->monitoring['parent'][ $post_parent ] ) ) { unset( $this->monitoring['parent'][ $post_parent ] ); $this->set_as_markdown( $post_id ); } } /** * Run a comment through Markdown. Easy peasy. * * @param string $content - the content. * @return string */ public function pre_comment_content( $content ) { return $this->transform( $content, array( 'id' => $this->comment_hash( $content ), ) ); } /** * Return a comment hash. * * @param string $content - the content of the comment. */ protected function comment_hash( $content ) { return 'c-' . substr( md5( $content ), 0, 8 ); } /** * Markdown conversion. Some DRYness for repetitive tasks. * * @param string $text Content to be run through Markdown. * @param array $args Arguments, with keys: * id: provide a string to prefix footnotes with a unique identifier * unslash: when true, expects and returns slashed data * decode_code_blocks: when true, assume that text in fenced code blocks is already * HTML encoded and should be decoded before being passed to Markdown, which does * its own encoding. * @return string Markdown-processed content */ public function transform( $text, $args = array() ) { // If this contains Gutenberg content, let's keep it intact. if ( has_blocks( $text ) ) { return $text; } $args = wp_parse_args( $args, array( 'id' => false, 'unslash' => true, 'decode_code_blocks' => ! $this->get_parser()->use_code_shortcode, ) ); // probably need to unslash. if ( $args['unslash'] ) { $text = wp_unslash( $text ); } /** * Filter the content to be run through Markdown, before it's transformed by Markdown. * * @module markdown * * @since 2.8.0 * * @param string $text Content to be run through Markdown * @param array $args Array of Markdown options. */ $text = apply_filters( 'wpcom_markdown_transform_pre', $text, $args ) ?? ''; // ensure our paragraphs are separated. $text = str_replace( array( '</p><p>', "</p>\n<p>" ), "</p>\n\n<p>", $text ); // visual editor likes to add <p>s. Buh-bye. $text = $this->get_parser()->unp( $text ); // sometimes we get an encoded > at start of line, breaking blockquotes. $text = preg_replace( '/^>/m', '>', $text ); // prefixes are because we need to namespace footnotes by post_id. $this->get_parser()->fn_id_prefix = $args['id'] ? $args['id'] . '-' : ''; // If we're not using the code shortcode, prevent over-encoding. if ( $args['decode_code_blocks'] ) { $text = $this->get_parser()->codeblock_restore( $text ); } // Transform it! $text = $this->get_parser()->transform( $text ); // Fix footnotes - kses doesn't like the : IDs it supplies. $text = preg_replace( '/((id|href)="#?fn(ref)?):/', '$1-', $text ); // Markdown inserts extra spaces to make itself work. Buh-bye. $text = rtrim( $text ); /** * Filter the content to be run through Markdown, after it was transformed by Markdown. * * @module markdown * * @since 2.8.0 * * @param string $text Content to be run through Markdown * @param array $args Array of Markdown options. */ $text = apply_filters( 'wpcom_markdown_transform_post', $text, $args ); // probably need to re-slash. if ( $args['unslash'] ) { $text = wp_slash( $text ); } return $text; } /** * Shows Markdown in the Revisions screen, and ensures that post_content_filtered * is maintained on revisions * * @param array $fields Post fields pertinent to revisions. */ public function wp_post_revision_fields( $fields ) { $fields['post_content_filtered'] = __( 'Markdown content', 'jetpack' ); return $fields; } /** * Do some song and dance to keep all post_content and post_content_filtered content * in the expected place when a post revision is restored. * * @param int $post_id The post ID have a restore done to it. * @param int $revision_id The revision ID being restored. */ public function wp_restore_post_revision( $post_id, $revision_id ) { if ( $this->is_markdown( $revision_id ) ) { $revision = get_post( $revision_id, ARRAY_A ); $post = get_post( $post_id, ARRAY_A ); $post['post_content'] = $revision['post_content_filtered']; // Yes, we put it in post_content, because our wp_insert_post_data() expects that. // set this flag so we can restore the post_content_filtered on the last revision later. $this->monitoring['restore'] = true; // let's not make a revision of our fixing update. add_filter( 'wp_revisions_to_keep', '__return_false', 99 ); wp_update_post( $post ); $this->fix_latest_revision_on_restore( $post_id ); remove_filter( 'wp_revisions_to_keep', '__return_false', 99 ); } } /** * We need to ensure the last revision has Markdown, not HTML in its post_content_filtered * column after a restore. * * @param int $post_id The post ID that was just restored. */ protected function fix_latest_revision_on_restore( $post_id ) { global $wpdb; $post = get_post( $post_id ); $last_revision = $wpdb->get_row( $wpdb->prepare( "SELECT * FROM $wpdb->posts WHERE post_type = 'revision' AND post_parent = %d ORDER BY ID DESC", $post->ID ) ); $last_revision->post_content_filtered = $post->post_content_filtered; wp_insert_post( (array) $last_revision ); } /** * Kicks off magic for an XML-RPC session. We want to keep editing Markdown * and publishing HTML. * * @param string $xmlrpc_method The current XML-RPC method. */ public function xmlrpc_actions( $xmlrpc_method ) { switch ( $xmlrpc_method ) { case 'metaWeblog.getRecentPosts': case 'wp.getPosts': case 'wp.getPages': add_action( 'parse_query', array( $this, 'make_filterable' ), 10, 1 ); break; case 'wp.getPost': $this->prime_post_cache(); break; } } /** * Function metaWeblog.getPost and wp.getPage fire xmlrpc_call action *after* get_post() is called. * So, we have to detect those methods and prime the post cache early. * * @return null */ protected function check_for_early_methods() { $raw_post_data = file_get_contents( 'php://input' ); if ( ! str_contains( $raw_post_data, 'metaWeblog.getPost' ) && ! str_contains( $raw_post_data, 'wp.getPage' ) ) { return; } include_once ABSPATH . WPINC . '/class-IXR.php'; $message = new IXR_Message( $raw_post_data ); $message->parse(); $post_id_position = 'metaWeblog.getPost' === $message->methodName ? 0 : 1; // phpcs:ignore WordPress.NamingConventions.ValidVariableName.UsedPropertyNotSnakeCase $this->prime_post_cache( $message->params[ $post_id_position ] ?? false ); } /** * Prime the post cache with swapped post_content. This is a sneaky way of getting around * the fact that there are no good hooks to call on the *.getPost xmlrpc methods. * * @param bool $post_id - the post ID that we're priming. */ private function prime_post_cache( $post_id = false ) { global $wp_xmlrpc_server; if ( ! $post_id ) { if ( isset( $wp_xmlrpc_server->message->params[3] ) ) { $post_id = $wp_xmlrpc_server->message->params[3]; } else { return; // Exit early if we can't get a valid post_id } } // prime the post cache. if ( $this->is_markdown( $post_id ) ) { $post = get_post( $post_id ); if ( ! empty( $post->post_content_filtered ) ) { wp_cache_delete( $post->ID, 'posts' ); $post = $this->swap_for_editing( $post ); wp_cache_add( $post->ID, $post, 'posts' ); $this->posts_to_uncache[] = $post_id; } } // uncache munged posts if using a persistent object cache. if ( wp_using_ext_object_cache() ) { add_action( 'shutdown', array( $this, 'uncache_munged_posts' ) ); } } /** * Swaps `post_content_filtered` back to `post_content` for editing purposes. * * @param object $post WP_Post object. * @return object WP_Post object with swapped `post_content_filtered` and `post_content`. */ protected function swap_for_editing( $post ) { $markdown = $post->post_content_filtered; // unencode encoded code blocks. $markdown = $this->get_parser()->codeblock_restore( $markdown ); // restore beginning of line blockquotes. $markdown = preg_replace( '/^> /m', '> ', $markdown ); $post->post_content_filtered = $post->post_content; $post->post_content = $markdown; return $post; } /** * We munge the post cache to serve proper markdown content to XML-RPC clients. * Uncache these after the XML-RPC session ends. */ public function uncache_munged_posts() { // $this context gets lost in testing sometimes. Weird. foreach ( self::get_instance()->posts_to_uncache as $post_id ) { wp_cache_delete( $post_id, 'posts' ); } } /** * Since *.(get)?[Rr]ecentPosts calls get_posts with suppress filters on, we need to * turn them back on so that we can swap things for editing. * * @param object $wp_query WP_Query object. */ public function make_filterable( $wp_query ) { $wp_query->set( 'suppress_filters', false ); add_action( 'the_posts', array( $this, 'the_posts' ), 10, 2 ); } /** * Swaps post_content and post_content_filtered for editing. * * @param array $posts Posts returned by the just-completed query. * @return array Modified $posts */ public function the_posts( $posts ) { foreach ( $posts as $key => $post ) { if ( $this->is_markdown( $post->ID ) && ! empty( $posts[ $key ]->post_content_filtered ) ) { $markdown = $posts[ $key ]->post_content_filtered; $posts[ $key ]->post_content_filtered = $posts[ $key ]->post_content; $posts[ $key ]->post_content = $markdown; } } return $posts; } /** * Singleton silence is golden */ private function __construct() {} } add_action( 'init', array( WPCom_Markdown::get_instance(), 'load' ) );
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