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core.php
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<?php
/**
* @package wp-content-aware-engine
* @author Joachim Jensen <joachim@dev.institute>
* @license GPLv3
* @copyright 2023 by Joachim Jensen
*/
defined('ABSPATH') || exit;
if (!class_exists('WPCACore')) {
$domain = explode('/', plugin_basename(__FILE__));
define('WPCA_DOMAIN', $domain[0]);
define('WPCA_PATH', plugin_dir_path(__FILE__));
/**
* Core for WordPress Content Aware Engine
*/
final class WPCACore
{
/**
* Using class prefix instead of namespace
* for PHP5.2 compatibility
*/
const CLASS_PREFIX = 'WPCA';
/**
* Prefix for data (keys) stored in database
*/
const PREFIX = '_ca_';
/**
* Post Type for condition groups
*/
const TYPE_CONDITION_GROUP = 'condition_group';
/**
* Post Statuses for condition groups
*/
/**
* @deprecated
*/
const STATUS_NEGATED = 'negated';
/**
* @deprecated
*/
const STATUS_PUBLISHED = 'publish';
const STATUS_OR = 'wpca_or';
const STATUS_EXCEPT = 'wpca_except';
/**
* Exposures for condition groups
*/
const EXP_SINGULAR = 0;
const EXP_SINGULAR_ARCHIVE = 1;
const EXP_ARCHIVE = 2;
/**
* @deprecated 7.0
*/
const CAPABILITY = 'edit_theme_options';
/**
* Name for generated nonces
*/
const NONCE = '_ca_nonce';
const OPTION_CONDITION_TYPE_CACHE = '_ca_condition_type_cache';
const OPTION_POST_TYPE_OPTIONS = '_ca_post_type_options';
/**
* Post Types that use the engine
* @var WPCATypeManager
*/
private static $type_manager;
/**
* Conditions retrieved from database
* @var array
*/
private static $condition_cache = [];
/**
* Objects retrieved from database
* @var array
*/
private static $post_cache = [];
private static $wp_query_original = [];
private static $filtered_modules = [];
/**
* Constructor
*/
public static function init()
{
spl_autoload_register([__CLASS__,'_autoload_class_files']);
if (is_admin()) {
add_action(
'admin_enqueue_scripts',
[__CLASS__,'add_group_script_styles'],
9
);
add_action(
'delete_post',
[__CLASS__,'sync_group_deletion']
);
add_action(
'trashed_post',
[__CLASS__,'sync_group_trashed']
);
add_action(
'untrashed_post',
[__CLASS__,'sync_group_untrashed']
);
add_action(
'wpca/modules/save-data',
[__CLASS__,'save_condition_options'],
10,
3
);
add_action(
'wp_ajax_wpca/add-rule',
[__CLASS__,'ajax_update_group']
);
}
add_action(
'init',
[__CLASS__,'add_group_post_type'],
99
);
add_action(
'init',
[__CLASS__,'schedule_cache_condition_types'],
99
);
add_action(
'wpca/cache_condition_types',
[__CLASS__,'cache_condition_types'],
999
);
}
/**
* Get type manager
*
* @since 4.0
* @return WPCATypeManager
*/
public static function types()
{
if (!isset(self::$type_manager)) {
self::$type_manager = new WPCATypeManager();
}
return self::$type_manager;
}
/**
* @since 8.0
*
* @return void
*/
public static function schedule_cache_condition_types()
{
if (wp_next_scheduled('wpca/cache_condition_types') !== false) {
return;
}
wp_schedule_event(get_gmt_from_date('today 02:00:00', 'U'), 'daily', 'wpca/cache_condition_types');
}
/**
* Cache condition types currently in use
*
* @since 8.0
*
* @return void
*/
public static function cache_condition_types()
{
$all_modules = [];
$modules_by_type = [];
$cache = [];
$types = self::types();
foreach ($types as $type => $modules) {
$modules_by_type[$type] = [];
$cache[$type] = [];
foreach ($modules as $module) {
$modules_by_type[$type][$module->get_data_key()] = $module->get_id();
$all_modules[$module->get_data_key()] = $module->get_data_key();
}
}
if (!$all_modules) {
update_option(self::OPTION_CONDITION_TYPE_CACHE, []);
return;
}
global $wpdb;
$query = '
SELECT p.post_type, m.meta_key
FROM ' . $wpdb->posts . ' p
INNER JOIN ' . $wpdb->posts . ' c ON c.post_parent = p.ID
INNER JOIN ' . $wpdb->postmeta . ' m ON m.post_id = c.ID
WHERE p.post_type IN (' . self::sql_prepare_in(array_keys($modules_by_type)) . ')
AND m.meta_key IN (' . self::sql_prepare_in($all_modules) . ')
GROUP BY p.post_type, m.meta_key
';
$results = (array) $wpdb->get_results($query);
foreach ($results as $result) {
if (isset($modules_by_type[$result->post_type][$result->meta_key])) {
$cache[$result->post_type][] = $modules_by_type[$result->post_type][$result->meta_key];
}
}
update_option(self::OPTION_CONDITION_TYPE_CACHE, $cache);
}
/**
* Register group post type
*
* @since 1.0
* @return void
*/
public static function add_group_post_type()
{
//This is just a safety placeholder,
//authorization will be done with parent object's cap
$capability = 'edit_theme_options';
$capabilities = [
'edit_post' => $capability,
'read_post' => $capability,
'delete_post' => $capability,
'edit_posts' => $capability,
'delete_posts' => $capability,
'edit_others_posts' => $capability,
'publish_posts' => $capability,
'read_private_posts' => $capability
];
register_post_type(self::TYPE_CONDITION_GROUP, [
'labels' => [
'name' => __('Condition Groups', WPCA_DOMAIN),
'singular_name' => __('Condition Group', WPCA_DOMAIN),
],
'capabilities' => $capabilities,
'public' => false,
'hierarchical' => false,
'exclude_from_search' => true,
'publicly_queryable' => false,
'show_ui' => false,
'show_in_menu' => false,
'show_in_nav_menus' => false,
'show_in_admin_bar' => false,
'show_in_rest' => false,
'has_archive' => false,
'rewrite' => false,
'query_var' => false,
'supports' => ['title'],
'can_export' => false,
'delete_with_user' => false
]);
register_post_status(self::STATUS_NEGATED, [
'label' => _x('Negated', 'condition status', WPCA_DOMAIN),
'public' => false,
'exclude_from_search' => true,
'show_in_admin_all_list' => false,
'show_in_admin_status_list' => false,
]);
register_post_status(self::STATUS_EXCEPT, [
'label' => _x('Exception', 'condition status', WPCA_DOMAIN),
'public' => false,
'exclude_from_search' => true,
'show_in_admin_all_list' => false,
'show_in_admin_status_list' => false,
]);
register_post_status(self::STATUS_OR, [
'label' => _x('Or', 'condition status', WPCA_DOMAIN),
'public' => false,
'exclude_from_search' => true,
'show_in_admin_all_list' => false,
'show_in_admin_status_list' => false,
]);
}
/**
* Get group IDs by their parent ID
*
* @since 1.0
* @param int $parent_id
* @return array
*/
private static function get_group_ids_by_parent($parent_id)
{
if (!self::types()->has(get_post_type($parent_id))) {
return [];
}
global $wpdb;
return (array)$wpdb->get_col($wpdb->prepare("SELECT ID FROM $wpdb->posts WHERE post_parent = '%d'", $parent_id));
}
/**
* Delete groups from database when their parent is deleted
*
* @since 1.0
* @param int $post_id
* @return void
*/
public static function sync_group_deletion($post_id)
{
$groups = self::get_group_ids_by_parent($post_id);
if ($groups) {
foreach ($groups as $group_id) {
//Takes care of metadata and terms too
wp_delete_post($group_id, true);
}
}
}
/**
* Trash groups when their parent is trashed
*
* @since 1.0
* @param int $post_id
* @return void
*/
public static function sync_group_trashed($post_id)
{
$groups = self::get_group_ids_by_parent($post_id);
if ($groups) {
foreach ($groups as $group_id) {
wp_trash_post($group_id);
}
}
}
/**
* Untrash groups when their parent is untrashed
*
* @since 1.0
* @param int $post_id
* @return void
*/
public static function sync_group_untrashed($post_id)
{
$groups = self::get_group_ids_by_parent($post_id);
if ($groups) {
foreach ($groups as $group_id) {
wp_untrash_post($group_id);
}
}
}
/**
* @param string $post_type
* @return array
*/
public static function get_conditional_modules($post_type)
{
if (!isset(self::$filtered_modules[$post_type])) {
return [];
}
return self::$filtered_modules[$post_type];
}
/**
* Get filtered condition groups
*
* @since 2.0
* @return array
*/
public static function get_conditions($post_type)
{
global $wpdb, $wp_query, $post;
if (!self::types()->has($post_type) || (!$wp_query->query && !$post) || is_admin()) {
return [];
}
// Return cache if present
if (isset(self::$condition_cache[$post_type])) {
return self::$condition_cache[$post_type];
}
$where = [];
$join = [];
$cache = [
$post_type
];
$modules = self::types()->get($post_type)->all();
$modules = self::filter_condition_type_cache($post_type, $modules);
//avoid combining as long as negated conditions are being deprecated
// foreach (self::types() as $other_type => $other_modules) {
// if ($other_type == $post_type) {
// continue;
// }
// if (self::filter_condition_type_cache($other_type, $other_modules->all()) === $modules) {
// $cache[] = $other_type;
// }
// }
self::fix_wp_query();
$in_context_by_module_id = [];
foreach ($modules as $module) {
$id = $module->get_id();
$in_context = apply_filters("wpca/module/$id/in-context", $module->in_context());
$in_context_by_module_id[$id] = $in_context;
if (!$in_context) {
continue;
}
$data = $module->get_context_data();
if (empty($data)) {
$in_context_by_module_id[$id] = false;
continue;
}
if (is_array($data)) {
$name = $module->get_query_name();
$data = "($name.meta_value IS NULL OR $name.meta_value IN (" . self::sql_prepare_in($data) . '))';
}
$join[$id] = $module->db_join();
$where[$id] = apply_filters("wpca/module/$id/db-where", $data);
self::$filtered_modules[$post_type][] = $module;
}
$use_negated_conditions = self::get_option($post_type, 'legacy.negated_conditions', false);
// Check if there are any conditions for current content
$groups_in_context = [];
if (!empty($where)) {
$post_status = [
self::STATUS_PUBLISHED,
self::STATUS_OR,
self::STATUS_EXCEPT
];
if ($use_negated_conditions) {
$post_status[] = self::STATUS_NEGATED;
}
$chunk_size = count($join);
if (defined('WPCA_SQL_JOIN_SIZE') && is_integer(WPCA_SQL_JOIN_SIZE) && WPCA_SQL_JOIN_SIZE > 0) {
$chunk_size = WPCA_SQL_JOIN_SIZE;
}
$joins = array_chunk($join, $chunk_size);
$joins_max = count($joins) - 1;
$wheres = array_chunk($where, $chunk_size);
$group_ids = [];
$where2 = [];
$where2[] = "p.post_type = '" . self::TYPE_CONDITION_GROUP . "'";
$where2[] = "p.post_status IN ('" . implode("','", $post_status) . "')";
$where2[] = 'p.menu_order ' . (is_archive() || is_home() ? '>=' : '<=') . ' 1';
foreach ($joins as $i => $join) {
if ($i == $joins_max) {
$groups_in_context = $wpdb->get_results(
'SELECT p.ID, p.post_parent, p.post_status ' .
"FROM $wpdb->posts p " .
implode(' ', $join) . '
WHERE
' . implode(' AND ', $wheres[$i]) . '
AND ' . implode(' AND ', $where2) .
(!empty($group_ids) ? ' AND p.id IN (' . implode(',', $group_ids) . ')' : ''),
OBJECT_K
);
break;
}
$group_ids = array_merge($group_ids, $wpdb->get_col(
'SELECT p.ID ' .
"FROM $wpdb->posts p " .
implode(' ', $join) . '
WHERE
' . implode(' AND ', $wheres[$i]) . '
AND ' . implode(' AND ', $where2)
));
}
}
$groups_negated = [];
if ($use_negated_conditions) {
$groups_negated = $wpdb->get_results($wpdb->prepare(
'SELECT p.ID, p.post_parent ' .
"FROM $wpdb->posts p " .
"WHERE p.post_type = '%s' " .
"AND p.post_status = '%s' ",
self::TYPE_CONDITION_GROUP,
self::STATUS_NEGATED
), OBJECT_K);
}
if (!empty($groups_in_context) || !empty($groups_negated)) {
//Force update of meta cache to prevent lazy loading
update_meta_cache('post', array_keys($groups_in_context + $groups_negated));
}
//Exclude types that have unrelated content in same group
foreach ($modules as $module) {
$groups_in_context = $module->filter_excluded_context(
$groups_in_context,
$in_context_by_module_id[$module->get_id()]
);
}
//exclude exceptions
$excepted = [];
foreach ($groups_in_context as $group_id => $group) {
if ($group->post_status == self::STATUS_EXCEPT) {
$excepted[$group->post_parent] = 1;
}
}
//condition group => type
$valid = [];
foreach ($groups_in_context as $group) {
$valid[$group->ID] = $group->post_parent;
}
foreach ($valid as $group_id => $parent_id) {
if (isset($excepted[$parent_id])) {
unset($valid[$group_id]);
}
}
if ($use_negated_conditions) {
//Filter negated groups
//type => group
$handled_already = array_flip($valid);
foreach ($groups_negated as $group) {
if (isset($valid[$group->ID])) {
unset($valid[$group->ID]);
} else {
$valid[$group->ID] = $group->post_parent;
}
if (isset($handled_already[$group->post_parent])) {
unset($valid[$group->ID]);
}
$handled_already[$group->post_parent] = 1;
}
}
self::restore_wp_query();
foreach ($cache as $cache_type) {
self::$condition_cache[$cache_type] = $valid;
}
return self::$condition_cache[$post_type];
}
/**
* Get filtered posts from a post type
*
* @since 1.0
* @return array|bool
*/
public static function get_posts($post_type)
{
if (isset(self::$post_cache[$post_type])) {
return self::$post_cache[$post_type];
}
$valid = self::get_conditions($post_type);
//if cache hasn't been set, method was called too early
if (!isset(self::$condition_cache[$post_type])) {
return false;
}
self::$post_cache[$post_type] = [];
$results = [];
if (!empty($valid)) {
$data = new WP_Query([
'post__in' => array_values($valid),
'post_type' => $post_type,
'post_status' => 'publish',
'posts_per_page' => -1,
'ignore_sticky_posts' => true,
'update_post_term_cache' => false,
'update_post_meta_cache' => true,
'suppress_filters' => true,
'no_found_rows' => true,
'orderby' => 'none'
]);
$results = array_merge($results, $data->posts);
}
//legacy sorting
uasort($results, function (WP_Post $post_a, WP_Post $post_b) {
//asc
if ($post_a->menu_order != $post_b->menu_order) {
return $post_a->menu_order < $post_b->menu_order ? -1 : 1;
}
$post_a_handle = get_post_meta($post_a->ID, '_ca_handle', true);
$post_b_handle = get_post_meta($post_b->ID, '_ca_handle', true);
//desc
if ($post_a_handle != $post_b_handle) {
return $post_a_handle > $post_b_handle ? -1 : 1;
}
//desc
if ($post_a->post_date != $post_b->post_date) {
return $post_a->post_date > $post_b->post_date ? -1 : 1;
}
return 0;
});
$results = array_reduce($results, function ($carry, $post) {
$carry[$post->ID] = (object)[
'ID' => $post->ID,
'post_type' => $post->post_type,
'handle' => get_post_meta($post->ID, '_ca_handle', true),
'menu_order' => $post->menu_order,
'post_date' => $post->post_date
];
return $carry;
}, []);
self::$post_cache[$post_type] = apply_filters("wpca/posts/$post_type", $results);
return self::$post_cache[$post_type];
}
public static function render_group_meta_box($post, $screen, $context = 'normal', $priority = 'default')
{
if (!($post instanceof WP_Post) || !self::types()->has($post->post_type)) {
return;
}
$post_type_obj = get_post_type_object($post->post_type);
if (!current_user_can($post_type_obj->cap->edit_post, $post->ID)) {
return;
}
$template = WPCAView::make('condition_options', [
'post_type' => $post->post_type
]);
add_action('wpca/group/settings', [$template,'render'], -1, 2);
$template = WPCAView::make('group_template', [
'post_type' => $post->post_type
]);
add_action('admin_footer', [$template,'render']);
$template = WPCAView::make('condition_template');
add_action('admin_footer', [$template,'render']);
$view = WPCAView::make('meta_box', [
'post_type' => $post->post_type,
'nonce' => wp_nonce_field(self::PREFIX . $post->ID, self::NONCE, true, false),
]);
$title = isset($post_type_obj->labels->ca_title) ? $post_type_obj->labels->ca_title : __('Conditional Logic', WPCA_DOMAIN);
add_meta_box(
'cas-rules',
$title,
[$view,'render'],
$screen,
$context,
$priority
);
}
/**
* Insert new condition group for a post type
* Uses current post per default
*
* @param int|null $post_id
* @return int|WP_Error
*/
public static function add_condition_group($post_id = null)
{
$post = get_post($post_id);
//Make sure to go from auto-draft to draft
if ($post->post_status == 'auto-draft') {
wp_update_post([
'ID' => $post->ID,
'post_title' => '',
'post_status' => 'draft'
]);
}
return wp_insert_post([
'post_status' => self::STATUS_OR,
'menu_order' => self::EXP_SINGULAR_ARCHIVE,
'post_type' => self::TYPE_CONDITION_GROUP,
'post_author' => $post->post_author,
'post_parent' => $post->ID,
]);
}
/**
* Get condition groups for a post type
* Uses current post per default
*
* @since 1.0
* @param WP_Post|int $post_id
* @return array
*/
private static function get_condition_groups($post_id = null)
{
$post = get_post($post_id);
$groups = [];
if ($post) {
$groups = get_posts([
'posts_per_page' => -1,
'post_type' => self::TYPE_CONDITION_GROUP,
'post_parent' => $post->ID,
'post_status' => [self::STATUS_PUBLISHED,self::STATUS_NEGATED,self::STATUS_EXCEPT, self::STATUS_OR],
'order' => 'DESC',
'orderby' => 'post_status'
]);
}
return $groups;
}
/**
* AJAX callback to update a condition group
*
* @since 1.0
* @return void
*/
public static function ajax_update_group()
{
if (!isset($_POST['current_id']) ||
!check_ajax_referer(self::PREFIX . $_POST['current_id'], 'token', false)) {
wp_send_json_error(__('Unauthorized request', WPCA_DOMAIN), 403);
}
$parent_id = (int)$_POST['current_id'];
$parent_type = get_post_type_object($_POST['post_type']);
if (!current_user_can($parent_type->cap->edit_post, $parent_id)) {
wp_send_json_error(__('Unauthorized request', WPCA_DOMAIN), 403);
}
$response = [
'message' => __('Conditions updated', WPCA_DOMAIN)
];
//Make sure some rules are sent
if (!isset($_POST['conditions'])) {
//Otherwise we delete group
if ($_POST['id'] && wp_delete_post(intval($_POST['id']), true) === false) {
wp_send_json_error(__('Could not delete conditions', WPCA_DOMAIN), 500);
}
$response['removed'] = true;
wp_send_json($response);
}
//If ID was not sent at this point, it is a new group
if (!$_POST['id']) {
$post_id = self::add_condition_group($parent_id);
$response['new_post_id'] = $post_id;
} else {
$post_id = (int)$_POST['id'];
}
wp_update_post([
'ID' => $post_id,
'post_status' => self::sanitize_status($_POST['status']),
'menu_order' => (int)$_POST['exposure']
]);
//Prune condition type cache, will rebuild within 24h
update_option(self::OPTION_CONDITION_TYPE_CACHE, []);
foreach (self::types()->get($parent_type->name)->all() as $module) {
//send $_POST here
$module->save_data($post_id);
}
do_action('wpca/modules/save-data', $post_id, $parent_type->name);
wp_send_json($response);
}
/**
* @param string $status
*
* @return string
*/
private static function sanitize_status($status)
{
switch ($status) {
case self::STATUS_NEGATED:
return self::STATUS_NEGATED;
case self::STATUS_EXCEPT:
return self::STATUS_EXCEPT;
case self::STATUS_OR:
case self::STATUS_PUBLISHED:
default:
return self::STATUS_OR;
}
}
/**
* Save registered meta for condition group
*
* @since 3.2
* @param int $group_id
* @return void
*/
public static function save_condition_options($group_id, $post_type)
{
$meta_keys = self::get_condition_meta_keys($post_type);
foreach ($meta_keys as $key => $default_value) {
$value = isset($_POST[$key]) ? $_POST[$key] : false;
if ($value) {
update_post_meta($group_id, $key, $value);
} elseif (get_post_meta($group_id, $key, true)) {
delete_post_meta($group_id, $key);
}
}
}
public static function add_group_script_styles($hook)
{
$current_screen = get_current_screen();
wp_register_style(
self::PREFIX . 'condition-groups',
plugins_url('/assets/css/condition_groups.css', __FILE__),
[],
WPCA_VERSION
);
if (self::types()->has($current_screen->post_type) && $current_screen->base == 'post') {
self::enqueue_scripts_styles($current_screen->post_type);
}
}
/**
* Get condition option defaults
*
* @since 3.2
* @param string $post_type
* @return array
*/
public static function get_condition_meta_keys($post_type)
{
$group_meta = [
'_ca_autoselect' => 0
];
return apply_filters('wpca/condition/meta', $group_meta, $post_type);
}
/**
* Register and enqueue scripts and styles
* for post edit screen
*
* @since 1.0
*
* @param string $post_type
*/
public static function enqueue_scripts_styles($post_type = '')
{
$post_type = empty($post_type) ? get_post_type() : $post_type;
$group_meta = self::get_condition_meta_keys($post_type);
$groups = self::get_condition_groups();
$data = [];
$i = 0;
foreach ($groups as $group) {
$data[$i] = [
'id' => $group->ID,
'status' => $group->post_status,
'exposure' => $group->menu_order,
'conditions' => []
];
foreach (self::types()->get($post_type)->all() as $module) {
$data[$i]['conditions'] = $module->get_group_data($data[$i]['conditions'], $group->ID);
}
foreach ($group_meta as $meta_key => $default_value) {
$value = get_post_meta($group->ID, $meta_key, true);
if ($value === false) {
$value = $default_value;
}
$data[$i][$meta_key] = $value;
}
$i++;
}
$conditions = [
'general' => [
'text' => __('General'),
'children' => []
],
'post_type' => [
'text' => __('Post Types'),
'children' => []
],
'taxonomy' => [
'text' => __('Taxonomies'),
'children' => []
],
'plugins' => [
'text' => __('Plugins'),
'children' => []
]
];
foreach (self::types()->get($post_type)->all() as $module) {
$category = $module->get_category();
if (!isset($conditions[$category])) {
$category = 'general';
}
//array_values used for backwards compatibility
$conditions[$category]['children'] = array_values($module->list_module($conditions[$category]['children']));
}
foreach ($conditions as $key => $condition) {
if (empty($condition['children'])) {
unset($conditions[$key]);
}
}
//Make sure to use packaged version
if (wp_script_is('select2', 'registered')) {
wp_deregister_script('select2');
wp_deregister_style('select2');
}
$plugins_url = plugins_url('', __FILE__);
//Add to head to take priority
//if being added under other name
wp_register_script(
'select2',
$plugins_url . '/assets/js/select2.min.js',
['jquery'],
'4.0.3',
false
);
wp_register_script(
'backbone.trackit',
$plugins_url . '/assets/js/backbone.trackit.min.js',
['backbone'],
'0.1.0',
true
);
wp_register_script(
'backbone.epoxy',
$plugins_url . '/assets/js/backbone.epoxy.min.js',
['backbone'],
'1.3.3',
true
);
wp_register_script(
self::PREFIX . 'condition-groups',
$plugins_url . '/assets/js/condition_groups.min.js',
['jquery','select2','backbone.trackit','backbone.epoxy'],
WPCA_VERSION,
true
);
wp_enqueue_script(self::PREFIX . 'condition-groups');
wp_localize_script(self::PREFIX . 'condition-groups', 'WPCA', [
'searching' => __('Searching', WPCA_DOMAIN),
'noResults' => __('No results found.', WPCA_DOMAIN),
'loadingMore' => __('Loading more results', WPCA_DOMAIN),