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bu-versions.php
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bu-versions.php
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<?php
/*
Plugin Name: BU Versions
Plugin URI: http://developer.bu.edu/bu-versions/
Author: Boston University (IS&T)
Author URI: http://sites.bu.edu/web/
Description: Make and review edits to published content.
Version: 0.7.8
Text Domain: bu-versions
Domain Path: /languages
*/
/**
Copyright Boston University
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.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
**/
/**
* @author gcorne@gmail.com
* @author mgburns@bu.edu
**/
/**
* @todo split into multiple files
**/
require_once __DIR__ . '/inc/class-bu-version-import.php';
class BU_Version_Workflow {
public static $v_factory;
public static $controller;
public static $admin;
public static $import;
const version = '0.7.8';
const version_meta = '_bu_version';
static function init() {
self::$v_factory = new BU_VPost_Factory();
self::$v_factory->register_post_types();
self::$controller = new BU_Version_Controller( self::$v_factory );
add_action( 'transition_post_status', array( self::$controller, 'transition_post_status' ), 10, 3 );
add_filter( 'the_preview', array(self::$controller, 'preview' ), 12 ); // needs to come after the regular preview filter
add_action( 'template_redirect', array(self::$controller, 'redirect_preview' ) );
add_action( 'template_redirect', array(self::$controller, 'override_meta' ), 1);
if ( version_compare($GLOBALS['wp_version'], '3.3.2', '>=' ) ) {
add_action( 'before_delete_post', array( self::$controller, 'delete_post_handler' ) );
// since we are replaying the menu construction the priority needs to be different for newer WP versions
add_action( 'admin_bar_menu', array( self::$controller, 'admin_bar_menu' ), 81 );
} else {
add_action( 'delete_post', array( self::$controller, 'delete_post_handler' ) );
add_action( 'admin_bar_menu', array( self::$controller, 'admin_bar_menu' ), 31 );
}
add_filter( 'map_meta_cap', array( self::$controller, 'map_meta_cap' ), 20, 4 );
// is this necessary?
add_rewrite_tag( '%version_id%', '[^&]+' );
add_filter( 'get_edit_post_link', array( self::$controller, 'override_edit_post_link' ), 10, 3 );
if ( is_admin() ) {
self::$admin = new BU_Version_Admin( self::$v_factory );
self::$admin->bind_hooks();
add_action( 'load-admin_page_bu_create_version', array( self::$controller, 'load_create_version' ) );
add_filter( 'redirect_post_location', array( self::$controller, 'published_version_redirect_loc' ), 10, 2 );
}
if ( class_exists( 'WP_Import' ) || class_exists( 'WXR_Importer' ) ) {
self::$import = new BU_Version_Import( self::$v_factory );
self::$import->bind_hooks();
}
add_action( 'shutdown', array( self::$controller, 'shutdown_handler' ) );
}
static function l10n() {
load_plugin_textdomain( 'bu-versions', false, plugin_basename( dirname( __FILE__ ) ) . '/languages/' );
}
}
add_action('init', array('BU_Version_Workflow', 'init'), 999);
add_action('init', array('BU_Version_Workflow', 'l10n'), 5);
class BU_Version_Admin {
public $v_factory;
function __construct( $v_factory ) {
$this->v_factory = $v_factory;
}
function bind_hooks() {
add_filter( 'parent_file', array( $this, 'parent_file' ) );
add_action( 'admin_init', array( $this, 'admin_init' ) );
add_action( 'admin_menu', array( $this, 'admin_menu' ) );
add_action( 'admin_notices', array( $this, 'admin_notices' ) );
add_filter( 'admin_body_class', array( $this, 'admin_body_class' ) );
add_action( 'admin_enqueue_scripts', array( $this, 'enqueue' ), 10, 1 );
add_action( 'add_meta_boxes', array( $this, 'add_meta_boxes' ), 10, 2 );
add_action( 'save_post', array( $this, 'save_page_template' ), 10, 2 );
add_filter( 'post_updated_messages', array( $this, 'version_updated_messages' ), 20 );
}
function enqueue() {
// I am not using __FILE__ symlinks are converted to their physical path
// which is sometimes problematic
wp_enqueue_script( 'bu-versions', plugins_url('/js/bu-versions.js', 'bu-versions/bu-versions.php' ), array( 'jquery' ), BU_Version_Workflow::version );
wp_localize_script( 'bu-versions', 'buVersionsL10N', array( 'replace' => __('Replace Original', 'bu-versions') ) );
wp_enqueue_style( 'bu-versions', plugins_url('/css/bu-versions.css', 'bu-versions/bu-versions.php' ), array(), BU_Version_Workflow::version );
}
function admin_init() {
$v_type_managers = $this->v_factory->managers();
foreach( $v_type_managers as $type => $manager ) {
$original_post_type = $manager->get_orig_post_type();
$post_type_obj = get_post_type_object( $type );
add_action('manage_' . $original_post_type . '_posts_columns', array($manager->admin, 'orig_columns'));
add_action('manage_' . $original_post_type . '_posts_custom_column', array($manager->admin, 'orig_column'), 10, 2);
add_filter('views_edit-' . $original_post_type, array($manager->admin, 'filter_status_buckets'));
}
}
function admin_menu() {
$v_type_managers = $this->v_factory->managers();
foreach( $v_type_managers as $type => $manager ) {
$original_post_type = $manager->get_orig_post_type();
$post_type_obj = get_post_type_object( $type );
$capability = $post_type_obj->cap->edit_posts;
if( $original_post_type === 'post' ) {
add_submenu_page( 'edit.php', null, $post_type_obj->labels->name, $capability, 'edit.php?post_type=' . $type);
} else {
add_submenu_page( 'edit.php?post_type=' . $original_post_type, null, $post_type_obj->labels->name, $capability, 'edit.php?post_type=' . $type);
}
}
add_submenu_page(null, null, null, 'read', 'bu_create_version', array('BU_Version_Controller', 'create_version_view'));
}
function admin_body_class($classes) {
global $current_screen;
$post_type = $current_screen->post_type;
if($this->v_factory->is_alt($post_type)) {
if(empty($classes)) {
$classes = 'bu_alt_postedit';
} else {
$classes .= ' bu_alt_postedit';
}
}
return $classes;
}
/**
* Display an admin notice on pages that have an alternate version in draft form.
*
* @global type $current_screen
* @global type $post_ID
*/
function admin_notices() {
global $current_screen;
global $post_ID;
if($current_screen->base == 'post') {
if($post_ID) {
$post = get_post($post_ID);
if($this->v_factory->is_alt($post->post_type)) {
$type = $this->v_factory->get($post->post_type);
$original = get_post_type_object($type->get_orig_post_type());
$version = new BU_Version();
$version->get($post_ID);
if(function_exists('lcfirst')) {
$label = lcfirst($original->labels->singular_name);
} else {
$label = $original->labels->singular_name;
$label[0] = strtolower($label[0]);
}
$original_link = $label;
if ( current_user_can( $original->cap->edit_post, $version->original->ID ) ) {
$original_link = sprintf('<a href="%s" target="_blank">%s %s</a>', $version->get_original_edit_url(), __('original', 'bu-versions' ), $label);
}
$notice = sprintf(__('This is a clone of an existing %s and will replace the %s when published.', 'bu-versions' ), $label, $original_link);
printf('<div class="updated bu-version-notice"><p>%s</p></div>', $notice);
} else {
$pto = get_post_type_object($post->post_type);
if(function_exists('lcfirst')) {
$label = lcfirst($pto->labels->singular_name);
} else {
$label = $pto->labels->singular_name;
$label[0] = strtolower($label[0]);
}
$version = new BU_Version();
if ($version->get_version($post_ID)) {
$edit_link = sprintf('<a href="%s" target="_blank">%s</a>', $version->get_edit_url(), __('Edit', 'bu-versions' ));
$notice = sprintf(__('There is an alternate version for this %s. %s', 'bu-versions' ), $label, $edit_link);
printf('<div class="updated bu-version-notice"><p>%s</p></div>', $notice);
}
// post overwritten with alternate version
$overwritten_post_id = get_option('_bu_version_post_overwritten');
if(!empty($overwritten_post_id) && $post->ID == $overwritten_post_id) {
$notice = sprintf(__('The alternate version has replaced the data of this %s and been deleted.', 'bu-versions'), $label);
printf('<div class="updated bu-version-notice"><p>%s</p></div>', $notice);
delete_option('_bu_version_post_overwritten');
}
}
}
}
}
function parent_file($file) {
if(strpos($file, 'edit.php') !== false) {
$parts = parse_url($file);
if(!isset($parts['query'])) return $file;
$params = null;
parse_str($parts['query'], $params);
if(isset($params['post_type'])) {
$v_manager = $this->v_factory->get($params['post_type']);
if(!is_null($v_manager)) {
$orig_post_type = $v_manager->get_orig_post_type();
if( $orig_post_type === 'post') {
$file = 'edit.php';
} else {
$file = add_query_arg(array('post_type' => $orig_post_type), $file);
}
}
}
}
return $file;
}
function add_meta_boxes($post_type, $post) {
if( $this->v_factory->is_alt( $post_type ) ) {
$manager = $this->v_factory->get( $post_type );
$original_post_type = $manager->get_orig_post_type();
if( $original_post_type == 'page' && 0 != count( get_page_templates() ) ) {
add_meta_box('bu-page-template', __('Page Attributes', 'bu-versions'), array($this,'page_template_meta_box'), $post_type, 'side', 'core');
}
}
}
function save_page_template($post_id, $post) {
if( defined('DOING_AUTOSAVE') && DOING_AUTOSAVE ) return;
$manager = $this->v_factory->get($post->post_type);
if( ! $manager || $manager->get_orig_post_type() != 'page' ) return;
if( isset( $_POST['bu_page_template'] ) ) {
$page_template = strip_tags( trim( $_POST['bu_page_template'] ) );
$page_templates = get_page_templates();
if ( 'default' == $page_template || in_array($page_template, $page_templates) ) {
update_post_meta($post_id, '_wp_page_template', $page_template);
}
}
}
function page_template_meta_box($post, $box) {
$page_template = get_post_meta($post->ID, '_wp_page_template', true);
include dirname( __FILE__ ) . '/interface/page-template.php';
}
function version_updated_messages($messages) {
global $post;
if($this->v_factory->is_alt($post->post_type)) {
$v_manager = $this->v_factory->get($post->post_type);
$orig_post_type = $v_manager->get_orig_post_type();
// Logic in edit-form-advanced.php will handle alternate posts without our help
if (array_key_exists($orig_post_type, $messages) && 'post' !== $orig_post_type) {
$messages[$post->post_type] = $messages[$orig_post_type];
}
}
return $messages;
}
}
class BU_VPost_Factory {
protected $v_post_types;
function __construct() {
$this->v_post_types = array();
}
function increment_post_type_name( $name ) {
$inc = 1;
while ( post_type_exists( $name ) ) {
$name = sprintf( '%s%d', $name, $inc );
$inc++;
}
return $name;
}
/**
* Registers an "alt" post type for each post_type that has show_ui enabled.
*
* Capabilities are inherited from the parent post_type.
*/
function register_post_types() {
$labels = array(
'name' => _x('Alternate Versions', 'post type general name', 'bu-versions'),
'singular_name' => _x('Alternate Version', 'post type singular name', 'bu-versions'),
'add_new' => _x('Add New', '', 'bu-versions'),
'add_new_item' => __('Add New Version', 'bu-versions'),
'edit_item' => __('Edit Alternate Version', 'bu-versions'),
'new_item' => __('New', 'bu-versions'),
'view_item' => __('View Alternate Version', 'bu-versions'),
'search_items' => __('Search Alternate Versions', 'bu-versions'),
'not_found' => __('No Alternate Versions found', 'bu-versions'),
'not_found_in_trash' => __('No Alternate Versions found in Trash', 'bu-versions'),
'parent_item_colon' => '',
'menu_name' => 'Alternate Versions'
);
$default_supports = array( 'editor', 'title', 'author', 'revisions', 'excerpt' ); // @todo copy support from the post_type
$default_args = array(
'labels' => $labels,
'description' => '',
'publicly_queryable' => true,
'exclude_from_search' => true,
'map_meta_cap' => true,
'hierarchical' => false,
'rewrite' => false,
'has_archive' => false,
'query_var' => true,
'supports' => array(),
'taxonomies' => array(),
'show_ui' => true,
'show_in_menu' => false,
'menu_position' => null,
'menu_icon' => null,
'permalink_epmask' => EP_PERMALINK,
'can_export' => true,
'show_in_nav_menus' => false,
'show_in_menu' => false,
'public' => true
);
$post_types = get_post_types(array('show_ui' => true), 'objects');
$alt_supported_features = array(
'thumbnail' => array('_thumbnail_id'),
'bu-content-banner' => array('_bu_banner'),
'bu-post-details' => array(
'_bu_thumbnail',
'_bu_page_description',
'_bu_meta_description',
'_bu_meta_mirror_description',
'_bu_meta_keywords',
'_bu_meta_robots',
'_bu_title'
),
'bu-disable-autop' => array('_bu_disable_autop')
);
// plugins/themes can add support for particular features by filtering
// the array of supported features
$alt_supported_features = apply_filters('bu_alt_versions_feature_support', $alt_supported_features);
foreach($post_types as $type) {
$should_register = true;
if ( $type->name == 'attachment' || strpos( $type->name, '_alt') !== false ) {
$should_register = false;
}
// allow plugins/themes to control whether a post type supports alternate versions
// consider using post_type supports
if(false === apply_filters('bu_alt_versions_for_type', $should_register, $type)) {
continue;
}
$args = $default_args;
$args['capability_type'] = $type->capability_type;
foreach ( $default_supports as $support ) {
if ( post_type_supports( $type->name, $support ) ) {
$args['supports'][] = $support;
}
}
foreach(array_keys($alt_supported_features) as $feature) {
if( post_type_supports($type->name, $feature) ) {
$args['supports'][] = $feature;
}
}
$args['labels']['name'] = sprintf( _x('Alternate %s', 'post type general name', 'bu-versions'), $type->labels->name );
$args['labels']['singular_name'] = sprintf( _x('Alternate %s', 'post type singular name', 'bu-versions'), $type->labels->singular_name );
$args = apply_filters('bu_alt_version_args', $args, $type);
$meta_keys = array();
foreach( $args['supports'] as $feature ) {
if( isset( $alt_supported_features[ $feature ] ) ) {
$meta_keys = array_merge( $meta_keys, $alt_supported_features[ $feature ] );
}
}
// special case to copy the page template
if( $type->name == 'page' ) {
$meta_keys[] = '_wp_page_template';
}
$alt_name = $type->name;
if ( strlen( $alt_name ) > 16 ) {
$alt_name = substr($type->name, 0, 14); // 14 chars + up to 2 for increment + 4 for '_alt' = 20 char limit
if ( post_type_exists( $alt_name ) ) {
$alt_name = self::increment_post_type_name( $alt_name );
}
}
$v_post_type = apply_filters( 'bu_alt_versions_post_type_alt_name', $alt_name . '_alt', $type );
$register = register_post_type($v_post_type, $args);
if(!is_wp_error($register)) {
$this->v_post_types[$v_post_type] = new BU_Version_Manager($type->name, $v_post_type, $args, $meta_keys);
} else {
error_log(sprintf('The alternate post type %s could not be registered. Error: %s', $v_post_type, $register->get_error_message()));
}
}
}
function managers() {
return $this->v_post_types;
}
function get($post_type) {
if( $this->is_alt( $post_type ) ) {
return $this->v_post_types[$post_type];
} else {
return null;
}
}
function get_alt_types() {
return array_keys($this->v_post_types);
}
function get_alt_manager($post_type) {
foreach($this->v_post_types as $manager) {
if($manager->orig_post_type === $post_type) {
return $manager;
}
}
}
function is_alt($post_type) {
return is_array($this->v_post_types) && array_key_exists($post_type, $this->v_post_types);
}
}
class BU_Version_Manager {
/**
* Post type of the alternate version
* @var type
*/
public $post_type = null;
public $meta_keys;
/**
* Post type of the originals
*
* @var type
*/
public $orig_post_type = null;
public $admin = null;
function __construct($orig_post_type, $post_type, $args, $meta_keys) {
$this->post_type = $post_type;
$this->orig_post_type = $orig_post_type;
$this->meta_keys = $meta_keys;
if(is_admin()) {
$this->admin = new BU_Version_Manager_Admin( $this->post_type );
}
}
function create( $post_id ) {
$version = new BU_Version();
$result = $version->create( $post_id, $this->post_type, $this->meta_keys );
if( $result && ! is_wp_error( $result ) ) {
return $version;
} else {
return $result;
}
}
function publish($post_id) {
$version = new BU_Version();
$version->get($post_id);
$result = $version->publish( $this->meta_keys );
if( $result && ! is_wp_error( $result ) ) {
return $version;
} else {
return $result;
}
}
function get_orig_post_type() {
return $this->orig_post_type;
}
function override_meta($val, $object_id, $key, $single) {
if( in_array( $key, $this->meta_keys ) && isset( $_GET['version_id'] ) ) {
$version_id = (int) trim( $_GET['version_id'] );
$version = new BU_Version();
$version->get($version_id);
remove_filter('get_post_metadata', array($this, 'override_meta'), 10, 4);
if($object_id == $version->original->ID) {
$val = get_post_meta($version->post->ID, $key);
}
add_filter('get_post_metadata', array($this, 'override_meta'), 10, 4);
}
return $val;
}
function get_versions($orig_post_id) {
$args = array(
'post_parent' => (int) $orig_post_id,
'post_type' => $this->post_type,
'posts_per_page' => -1,
'post_status' => 'any'
);
$query = new WP_Query($args);
$posts = $query->get_posts();
if(empty($posts)) {
return null;
}
$versions = array();
foreach($posts as $post) {
$version = new BU_Version();
$version->get($post->ID);
$versions[] = $version;
}
return $versions;
}
function delete_versions($orig_post_id) {
$versions = $this->get_versions($orig_post_id);
if( ! isset( $versions ) ) return;
foreach($versions as $version) {
$version->delete_version();
}
}
}
class BU_Version_Manager_Admin {
public $post_type;
function __construct($post_type) {
$this->post_type = $post_type;
}
function filter_status_buckets($views) {
$post_type_obj = get_post_type_object( $this->post_type );
$count = $this->get_total_post_count();
$views['pending_edits'] = sprintf( '<a href="edit.php?post_type=%s">%s <span class="count">(%s)</span></a>', $this->post_type, $post_type_obj->labels->name, $count );
return $views;
}
function get_total_post_count() {
$count = 0;
$stats = wp_count_posts( $this->post_type );
foreach ( $stats as $s ) {
$count += $s;
}
return $count;
}
function orig_columns($columns) {
$insertion_point = 3;
$i = 1;
$new_columns = array();
foreach($columns as $key => $value) {
if($i == $insertion_point) {
$post_type_obj = get_post_type_object( $this->post_type );
$new_columns['alternate_versions'] = $post_type_obj->labels->singular_name;
}
$new_columns[$key] = $columns[$key];
$i++;
}
return $new_columns;
}
function orig_column($column_name, $post_id) {
if($column_name != 'alternate_versions') return;
$version_id = get_post_meta($post_id, BU_Version_Workflow::version_meta, true);
if(!empty($version_id)) {
$version = new BU_Version();
$version->get($version_id);
if( current_user_can( 'edit_post', $version_id ) ) {
$link_txt = __('edit version', 'bu-versions');
printf('<a class="bu_version_edit" href="%s" title="%s">%s</a>', $version->get_edit_url('display'), esc_attr__('Edit this item', 'bu-versions'), $link_txt);
}
} else {
$post = get_post($post_id);
$link_txt = __('create clone', 'bu-versions');
printf('<a class="bu_version_clone" href="%s" title="%s">%s</a>', BU_Version_Controller::get_URL($post), esc_attr__('Create alternate version of this item'), $link_txt);
}
}
}
class BU_Version_Controller {
public $v_factory;
public $published_versions;
function __construct($v_factory) {
$this->v_factory = $v_factory;
$this->published_versions = array();
}
function map_meta_cap($caps, $cap, $user_id, $args) {
if(isset($_GET['version_id'])) {
$version_id = (int) trim($_GET['version_id']);
$version = new BU_Version();
$version->get($version_id);
if(is_object($version->original)) {
$post_type = get_post_type_object($version->original->post_type);
$caps = array($post_type->cap->edit_posts);
}
}
return $caps;
}
static function get_URL($post) {
$url = admin_url( 'admin.php?page=bu_create_version' );
$url = add_query_arg(array('post_type' => $post->post_type, 'post' => $post->ID), $url);
return wp_nonce_url($url, 'create_version');
}
function transition_post_status($new_status, $old_status, $post) {
if( $this->v_factory->is_alt($post->post_type)) {
// Alternate version is being published (replacing the original)
if($new_status === 'publish' && $old_status !== 'publish') {
// Publish logic runs late on save_post hook to give changes made with
// publish time to be committed to alternate version prior to publication
add_action('save_post', array($this, 'publish_version'), 9999, 2);
} else {
$version = new BU_Version();
$version->get($post->ID);
do_action('bu_version_' . $new_status, $version->post, $version->original, $old_status);
}
}
}
function publish_version($post_id, $post) {
if( $this->v_factory->is_alt($post->post_type)) {
// Ensure we only run once
remove_action('save_post', array($this, 'publish_version'), 9999);
// Publish alternate version
$manager = $this->v_factory->get($post->post_type);
$version = $manager->publish( $post->ID );
if( $version && ! is_wp_error( $version ) ) {
$this->published_versions[] = $version;
} else {
error_log( "The alternate version could not be published. " . $version->get_error_message() );
}
}
}
function shutdown_handler() {
if ( is_array( $this->published_versions ) && count( $this->published_versions ) > 0 ) {
foreach( $this->published_versions as $version ) {
$version->delete_version();
}
}
}
function published_version_redirect_loc( $location, $post_id ) {
if ( $version = $this->get_published_version( $post_id ) ) {
$location = $version->get_original_edit_url();
}
return $location;
}
function get_published_version( $post_id ) {
foreach( $this->published_versions as $version ) {
if ( is_object( $version->post ) && $post_id == $version->post->ID ) return $version;
}
return false;
}
/**
* Add filters to override post meta data
**/
function override_meta() {
if(is_preview() && isset($_GET['version_id'])) {
$version_id = (int) trim($_GET['version_id']);
$version = new BU_Version();
$version->get($version_id);
if(isset($version->post->post_type)) {
$manager = $this->v_factory->get($version->post->post_type);
add_filter('get_post_metadata', array($manager, 'override_meta'), 10, 4);
}
}
}
/**
* Redirect page_version previews to the orginal page, but with a specific
* parameter included that triggers the content to be replaced with the data
* from the new version.
*/
function redirect_preview() {
$alt_versions = $this->v_factory->get_alt_types();
if(is_preview() && is_singular($alt_versions)) {
$request = strtolower(trim($_SERVER['REQUEST_URI']));
$request = preg_replace('#\?.*$#', '', $request);
$version_id = (int) get_query_var('p');
$version = new BU_version();
$version->get($version_id);
$url = $version->get_preview_URL();
if( isset( $url ) && $url != $_SERVER['REQUEST_URI'] ) {
wp_redirect($url, 302);
exit();
}
}
}
function preview($post) {
if ( ! is_object($post) )
return $post;
$version_id = (int) get_query_var('version_id');
$preview = wp_get_post_autosave($version_id);
if ( ! is_object($preview) ) {
$preview = get_post($version_id);
if( !is_object($preview)) return $post;
}
$preview = sanitize_post($preview);
$post->post_content = $preview->post_content;
$post->post_title = $preview->post_title;
$post->post_excerpt = $preview->post_excerpt;
// Workaround for `redirect_canonical` logic added in 4.0
// See https://core.trac.wordpress.org/changeset/28874
if ( 'page' === get_option( 'show_on_front' ) && $post->ID == get_option( 'page_on_front' ) ) {
add_filter( 'redirect_canonical', '__return_false' );
}
return $post;
}
// GET handler used to create a version
function load_create_version() {
if(wp_verify_nonce($_GET['_wpnonce'], 'create_version')) {
$post_id = (int) $_GET['post'];
$post = get_post($post_id);
if( ! $post ) {
wp_die(__("The post to be cloned could not be found.", 'bu-versions'));
}
$v_manager = $this->v_factory->get_alt_manager($post->post_type);
$post_type_obj = get_post_type_object( $v_manager->post_type );
if ( ! current_user_can( $post_type_obj->cap->edit_posts ) ) {
wp_die(__("You do not have permission to create an alternate version of this post.", 'bu-versions'));
}
$result = $v_manager->create( $post_id );
if( $result && ! is_wp_error( $result ) ) {
$redirect_url = add_query_arg(array('post' => $result->get_id(), 'action' => 'edit'), 'post.php');
wp_redirect($redirect_url);
exit();
} else {
wp_die(__("The alternate version could not be created. ", 'bu-versions') . $result->get_error_message() );
}
}
}
function delete_post_handler($post_id) {
$post = get_post($post_id);
if( $this->is_alt( $post->post_type ) ) {
$version = new BU_Version();
$version->get($post_id);
$version->delete_parent_meta();
} elseif($post->post_type != 'revision') {
$manager = $this->v_factory->get_alt_manager($post->post_type);
if($manager) {
$manager->delete_versions($post->ID);
}
}
}
function override_edit_post_link($url, $post_id, $context) {
$version_id = get_query_var('version_id');
if(! empty( $version_id ) && $post_id != $version_id) {
$version = new BU_Version;
$version->get($version_id);
$url = $version->get_edit_url();
}
return $url;
}
function admin_bar_menu() {
global $wp_admin_bar;
if(is_singular() && is_object( $wp_admin_bar ) ) {
if( is_preview() && isset( $_GET['version_id'] ) ) {
$post_id = (int) $_GET['version_id'];
$current_object = get_post( $post_id );
} else {
$current_object = get_queried_object();
}
$current_post_type = get_post_type_object( $current_object->post_type );
if ( ! isset( $current_object ) ) {
return;
}
$version = new BU_Version();
if( $this->is_alt( $current_object->post_type ) ) {
$version->get( $current_object->ID );
} else {
$alt_manager = $this->v_factory->get_alt_manager( $current_object->post_type );
if ( ! $alt_manager ) {
return;
}
$version->get_version( $current_object->ID );
}
$original_post_type = get_post_type_object( $version->original->post_type );
$alternate_post_type = null;
if( $version->has_version() ) {
$alternate_post_type = get_post_type_object( $version->post->post_type );
} else if ( $alt_manager ) {
$alternate_post_type = get_post_type_object( $alt_manager->post_type );
}
$wp_admin_bar->remove_menu('edit');
// Temporarily remove filters that interfere with generating "Edit" menu items
remove_filter( 'get_edit_post_link', array( $this, 'override_edit_post_link' ), 10, 3 );
remove_filter( 'map_meta_cap', array( $this, 'map_meta_cap' ), 20, 4 );
if ( current_user_can( $current_post_type->cap->edit_post, $current_object->ID ) ) {
$wp_admin_bar->add_menu( array( 'id' => 'edit', 'title' => $current_post_type->labels->edit_item, 'href' => get_edit_post_link( $current_object->ID ) ) );
if ( $version->original->ID != $current_object->ID && current_user_can( $original_post_type->cap->edit_post, $version->original->ID ) ) {
$wp_admin_bar->add_menu( array( 'parent' => 'edit', 'id' => 'bu-edit-original', 'title' => __('Edit Original', 'bu-versions'), 'href' => $version->get_original_edit_url() ) );
} else if ( $version->has_version() && $version->post->ID != $current_object->ID && current_user_can( $alternate_post_type->cap->edit_post, $version->post->ID ) ) {
$wp_admin_bar->add_menu( array( 'parent' => 'edit', 'id' => 'bu-edit-alt', 'title' => $alternate_post_type->labels->edit_item, 'href' => $version->get_edit_url() ) );
} else if ( ! $version->has_version() && current_user_can( $alternate_post_type->cap->create_posts ) ) {
$wp_admin_bar->add_menu( array( 'parent' => 'edit', 'id' => 'bu-create-alt', 'title' => __('Create Clone', 'bu-versions'), 'href' => BU_Version_Controller::get_URL($current_object) ) );
}
} else if ( $version->has_version() && current_user_can( $alternate_post_type->cap->edit_post, $version->post->ID ) ) {
$wp_admin_bar->add_menu( array( 'id' => 'bu-edit-alt', 'title' => $alternate_post_type->labels->edit_item, 'href' => $version->get_edit_url() ) );
} else if ( $alternate_post_type && current_user_can( $alternate_post_type->cap->create_posts ) ) {
$wp_admin_bar->add_menu( array( 'id' => 'bu-create-alt', 'title' => __('Create Clone', 'bu-versions'), 'href' => BU_Version_Controller::get_URL($current_object) ) );
}
add_filter( 'get_edit_post_link', array( $this, 'override_edit_post_link' ), 10, 3 );
add_filter( 'map_meta_cap', array( $this, 'map_meta_cap' ), 20, 4 );
}
}
function is_alt( $post_type ) {
return $this->v_factory->is_alt( $post_type );
}
static function create_version_view() {
// no-op
}
}
class BU_Version {
public $original = null;
public $post = null;
/**
* Get the alternate version for a particular post_id or the alternate
* version if it has already been retrieved.
*
* @param $post_id
**/
function get_version( $post_id = null ) {
if ( ! isset( $this->original ) || $this->original->ID != $post_id ) {
$original = get_post( $post_id );
if ( $original ) {
$this->original = $original;
$version_id = get_post_meta( $this->original->ID, BU_Version_Workflow::version_meta, true );
if ( ! empty( $version_id ) ) {
$version = get_post( $version_id );
if ( $version ) {
$this->post = $version;
}
}
}
}
return $this->post;
}
/**
* Load the alternate version and the post that the alternate version is
* based upon.
*
* @param $version_id
**/
function get( $version_id ) {
global $wpdb;
$this->post = get_post( $version_id );
if( is_object( $this->post ) ) {
// A bug in WP < 3.2 reset post parent IDs during autosaves under certain conditions
// To be cautious we fall back to post meta tracking key if post_parent = 0
// @see http://core.trac.wordpress.org/ticket/16673
if ( ! $this->post->post_parent ) {
$original_id = $wpdb->get_var( $wpdb->prepare( "SELECT post_id FROM {$wpdb->postmeta} WHERE meta_key = %s AND meta_value = %s", BU_Version_Workflow::version_meta, $version_id ) );
if ( $original_id )
$this->original = get_post( $original_id );