Mini Shell
<?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.
* **********************************************************************
*/
/**
* 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 $monitoring = array(
'post' => array(),
'parent' => array(),
);
/**
* Yay singletons!
*
* @return object WPCom_Markdown instance
*/
public static function get_instance() {
if ( ! self::$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 ) {
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, 2 );
remove_filter( 'edit_post_content', array( $this, 'edit_post_content' ), 10, 2 );
remove_filter( 'edit_post_content_filtered', array( $this, 'edit_post_content_filtered' ), 10, 2 );
remove_action( 'wp_restore_post_revision', array( $this, 'wp_restore_post_revision' ), 10, 2 );
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">%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">%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 ) {
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 ( 0 === strpos( $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 ( false === strpos( $raw_post_data, 'metaWeblog.getPost' )
&& false === strpos( $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 ] );
}
/**
* 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 ) {
$post_id = $wp_xmlrpc_server->message->params[3];
}
// 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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