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markdown-on-save.php
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markdown-on-save.php
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<?php
/*
Plugin Name: Markdown on Save
Description: Allows you to compose content in Markdown on a per-item basis. The markdown version is stored separately, so you can deactivate this plugin and your posts won't spew out Markdown.
Version: 2.0.2
Author: Mark Jaquith
Author URI: http://coveredwebservices.com/
*/
if ( file_exists( __DIR__ . '/vendor/autoload.php' ) ) {
require __DIR__ . '/vendor/autoload.php';
}
use League\CommonMark\CommonMarkConverter;
use League\CommonMark\Environment;
class CWS_Markdown {
const PM = '_cws_is_markdown';
const PMD = '_cws_is_markdown_gmt';
const FLAG = '<!--markdown-->';
var $instance;
var $markdown;
var $kses = false;
var $debug = false;
var $monitoring_for_insert_post = array();
var $monitoring_for_insert_post_child = array();
public function __construct() {
$this->instance =& $this;
add_action( 'init', array( $this, 'init' ) );
}
public function init() {
$this->markdown = new CommonMarkConverter(
apply_filters('cws_markdown_config', []),
apply_filters('cws_markdown_environment', Environment::createCommonMarkEnvironment())
);
load_plugin_textdomain( 'markdown-on-save', NULL, basename( dirname( __FILE__ ) ) );
add_filter( 'wp_insert_post_data', array( $this, 'wp_insert_post_data' ), 10, 2 );
// add_action( 'do_meta_boxes', array( $this, 'do_meta_boxes' ), 20, 2 );
add_action( 'post_submitbox_misc_actions', array( $this, 'submitbox_actions' ) );
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( 'load-post.php', array( $this, 'load' ) );
add_action( 'load-post.php', array( $this, 'enqueue' ) );
add_action( 'load-post-new.php', array( $this, 'enqueue' ) );
add_action( 'xmlrpc_call', array( $this, 'xmlrpc_actions' ) );
add_action( 'init', array( $this, 'maybe_remove_kses' ), 99 );
add_action( 'set_current_user', array( $this, 'maybe_remove_kses' ), 99 );
add_action( 'wp_insert_post', array( $this, 'wp_insert_post' ) );
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' ) );
}
private function trigger_error( $error, $type = E_USER_NOTICE ) {
if ( $this->debug )
trigger_error( $error, $type );
}
public function maybe_remove_kses() {
if (
// Filters return true if they existed before you removed them
remove_filter( 'content_filtered_save_pre', 'wp_filter_post_kses' ) &&
remove_filter( 'content_save_pre', 'wp_filter_post_kses' )
) {
$this->kses = true;
}
}
public function xmlrpc_actions($xmlrpc_method) {
if ( 'metaWeblog.getRecentPosts' === $xmlrpc_method ) {
add_action( 'parse_query', array( $this, 'make_filterable' ), 10, 1 );
} elseif ( 'metaWeblog.getPost' === $xmlrpc_method ) {
$this->prime_post_cache();
} elseif ( 'wp.getPosts' === $xmlrpc_method ) {
add_action( 'parse_query', array( $this, 'make_filterable' ), 10, 1 );
} elseif ( 'wp.getPost' === $xmlrpc_method ) {
$this->prime_post_cache();
}
}
private function prime_post_cache() {
global $wp_xmlrpc_server;
$params = $wp_xmlrpc_server->message->params;
$post_id = array_shift( $params );
// prime the post cache
if ( $this->is_markdown( $post_id ) ) {
$post = get_post( $post_id );
$post->post_content = self::FLAG . "\n\n" . $post->post_content_filtered;
wp_cache_delete( $post->ID, 'posts' );
wp_cache_add( $post->ID, $post, 'posts' );
}
}
public function _wp_post_revision_fields( $fields ) {
$fields['post_content_filtered'] = __( 'Markdown content', 'markdown-on-save' );
return $fields;
}
public function make_filterable( $wp_query ) {
$wp_query->set( 'suppress_filters', false );
add_action( 'the_posts', array( $this, 'the_posts' ), 10, 2 );
}
public function the_posts( $posts, $wp_query ) {
foreach ( $posts as $key => $post ) {
if ( $this->is_markdown( $post->ID ) ) {
$posts[$key]->post_content = self::FLAG . "\n\n" . $posts[$key]->post_content_filtered;
}
}
return $posts;
}
public function enqueue() {
wp_enqueue_script( 'markdown-on-save', plugin_dir_url( __FILE__ ) . '/js/markdown-on-save.js', array( 'jquery' ), '20120426' );
}
public function load() {
if ( !isset( $_GET['post'] ) )
return;
if ( $this->is_markdown( $_GET['post'] ) )
add_filter( 'user_can_richedit', '__return_false', 99 );
}
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
$post['force_markdown'] = true;
wp_update_post( $post );
}
}
public function wp_insert_post( $post_id ) {
$post_parent = get_post_field( 'post_parent', $post_id );
if ( isset( $this->monitoring_for_insert_post[$post_id] ) ) {
unset( $this->monitoring_for_insert_post[$post_id] );
$this->set_markdown( $post_id );
} elseif ( isset( $this->monitoring_for_insert_post_child[$post_parent] ) ) {
unset( $this->monitoring_for_insert_post_child[$post_parent] );
$this->set_markdown( $post_id );
} else {
return $post_id;
}
}
public function wp_insert_post_data( $data, $postarr ) {
// Note, the $data array is SLASHED!
$has_changed = false;
if ( isset( $postarr['ID'] ) ) {
$post_meta_post_id = $postarr['ID'];
$post = get_post( $postarr['ID'], ARRAY_A );
$has_changed = $data['post_content'] !== addslashes( $post['post_content'] );
// Note that $has_changed is only correct in a non-Markdown-aware saving mode.
} elseif ( isset( $postarr['post_parent'] ) && $postarr['post_parent'] ) {
$post = get_post( $postarr['post_parent'], ARRAY_A );
}
$nonce = isset( $postarr['_cws_markdown_nonce'] ) && wp_verify_nonce( $postarr['_cws_markdown_nonce'], 'cws-markdown-save' );
$autosave_and_was_markdown = defined( 'DOING_AUTOSAVE' ) && DOING_AUTOSAVE && isset( $post_meta_post_id ) && $this->is_markdown( $post_meta_post_id );
$revision_and_was_markdown = 'revision' == $postarr['post_type'] && $this->is_markdown( $postarr['post_parent'] );
$check = ( $nonce ) ? isset( $postarr['cws_using_markdown'] ) : false;
$comment = false !== stripos( $data['post_content'], self::FLAG );
$force_markdown = isset( $postarr['force_markdown'] ) && $postarr['force_markdown'];
$data['post_content'] = trim( str_ireplace( self::FLAG, '', $data['post_content'] ) );
if ( ( $nonce && $check ) || $comment || $autosave_and_was_markdown || $force_markdown || $revision_and_was_markdown ) {
if ( $revision_and_was_markdown && !$has_changed ) {
// Copying to a revision from the current post. So grab it from the current post.
$data['post_content'] = addslashes( $post['post_content_filtered'] );
}
$data['post_content_filtered'] = $data['post_content'];
$data['post_content'] = $this->markdown->convertToHtml( $data['post_content'] );
if ( $this->kses )
$data['post_content'] = wp_kses_post( $data['post_content'] );
if ( $postarr['ID'] )
$this->monitoring_for_insert_post[$postarr['ID']] = true; // Defer this, for when we know the post_modified_gmt value
elseif ( $revision_and_was_markdown )
$this->monitoring_for_insert_post_child[$data['post_parent']] = true; // We may not know the ID of the revision yet, so we tell our wp_insert_post() hook it's on the way.
} elseif ( ( $nonce && !$check ) || $has_changed ) {
if ( $this->kses )
$data['post_content'] = wp_kses_post( $data['post_content'] );
$data['post_content_filtered'] = '';
if ( $postarr['ID'] )
$this->set_not_markdown( $postarr['ID'] );
}
return $data;
}
public function submitbox_actions() {
$markdown = isset( $GLOBALS['post'] ) && isset( $GLOBALS['post']->ID ) && $this->is_markdown( $GLOBALS['post']->ID );
echo '<style>#submitdiv h2 > span, #submitdiv h3 > span { margin-left: 38px; } #cws-markdown { position: absolute; top: 5px; left: 10px; } #cws-markdown img { vertical-align: middle; margin-right: 10px; } #cws-markdown a:active { outline: 0 !important }</style><wrap id="cws-markdown" style="display: none"><a href="#" onclick="return false;"><img ' . ( !$markdown ? 'style="display:none" ' : '' ) . 'class="markdown-status markdown-on" src="' . plugin_dir_url( __FILE__ ) . '/img/32x20-solid.png" width="32" height="20" /><img ' . ( $markdown ? 'style="display:none" ' : '' ) . 'class="markdown-status markdown-off" src="' . plugin_dir_url( __FILE__ ) . '/img/32x20.png" width="32" height="20" /></a></wrap><script>document.getElementById("cws-markdown").style.display = "none";</script>';
echo '<input style="display: none" type="checkbox" name="cws_using_markdown" id="cws_using_markdown" value="1" ';
checked( $this->is_markdown( $GLOBALS['post']->ID ) );
echo ' />';
wp_nonce_field( 'cws-markdown-save', '_cws_markdown_nonce', false, true );
}
public function meta_box() {
global $post;
echo '<style>img.markdown-status:hover{cursor:pointer}</style>';
wp_nonce_field( 'cws-markdown-save', '_cws_markdown_nonce', false, true );
echo '<p><input type="checkbox" name="cws_using_markdown" id="cws_using_markdown" value="1" ';
checked( $this->is_markdown( $post->ID ) );
echo ' /> <label for="cws_using_markdown">' . __( 'This post is formatted with Markdown', 'markdown-on-save' ) . '</label></p>';
}
private function unp( $content ) {
return preg_replace( "#<p>(.*?)</p>(\n|$)#", '$1$2', $content );
}
private function is_markdown( $post_id ) {
$markdown = get_metadata( 'post', $post_id, self::PM, true );
$date_match = get_post_field( 'post_modified_gmt', $post_id ) == get_metadata( 'post', $post_id, self::PMD, true );
$is_markdown = ( 2 == $markdown && $date_match ) || ( $markdown && 2 != $markdown );
return !! $is_markdown;
}
private function set_markdown( $post_id ) {
update_metadata( 'post', $post_id, self::PMD, get_post_field( 'post_modified_gmt', $post_id ) );
return update_metadata( 'post', $post_id, self::PM, 2 );
}
private function set_not_markdown( $post_id ) {
delete_metadata( 'post', $post_id, self::PMD );
return delete_metadata( 'post', $post_id, self::PM );
}
public function edit_post_content( $content, $id ) {
if ( $this->is_markdown( $id ) ) {
$post = get_post( $id );
if ( $post )
$content = $post->post_content_filtered;
}
return $content;
}
public function edit_post_content_filtered( $content, $id ) {
if ( $this->is_markdown( $id ) ) {
$post = get_post( $id );
if ( $post )
$content = $post->post_content;
}
return $content;
}
}
new CWS_Markdown;