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<?php
/**
* Add-ons and events
*
*/
const CRB_ADDON_PAGE = 'cerber-addons';
const CRB_ADDON_SIGN = '_addon';
const CRB_BOOT_ADDONS = 'boot_cerber_addons';
// Add-ons API -----------------------------------------------------------------
/**
* @param string $file Add-on main PHP file to be invoked in if event occurs
* @param string $addon_id Add-on slug
* @param string $name Name of the add-on
* @param string $requires Version of WP Cerber required
* @param null|array $settings Configuration of the add-on setting fields
* @param null|callable $cb
*
* @return bool
*/
function cerber_register_addon( $file, $addon_id, $name, $requires, $settings = null, $cb = null ) {
return CRB_Addons::register_addon( $file, $addon_id, $name, $requires, $settings, $cb );
}
/**
* @param string $event
* @param callable $callback
* @param string $addon_id
*
* @return bool
*/
function cerber_add_handler( $event, $callback, $addon_id = null ) {
return CRB_Events::add_handler( $event, $callback, $addon_id );
}
// END of Add-ons API ----------------------------------------------------------
cerber_add_handler( 'update_settings', function ( $data ) {
CRB_Addons::settings_saved( $data['group'], $data['new_values'] );
crb_x_update_add_on_list();
} );
/**
* Creates and updates a list of files to be booted
*
*/
add_action( 'activated_plugin', 'crb_update_add_on_list' );
function crb_update_add_on_list() {
if ( ! $addons = CRB_Addons::get_all() ) {
cerber_update_set( CRB_BOOT_ADDONS, array() );
return;
}
$boot = array();
foreach ( CRB_Events::get_addons() as $event => $listeners ) {
$to_boot = array_intersect_key( $addons, array_flip( $listeners ) );
$boot[ $event ] = array_column( $to_boot, 'file' );
}
cerber_update_set( CRB_BOOT_ADDONS, $boot );
}
add_action( 'deactivated_plugin', 'crb_x_update_add_on_list' );
/**
* Is used when it's not possible to correctly refresh the list during the current request
*
*/
function crb_x_update_add_on_list() {
define( 'CRB_POSTPONE_REFRESH', 1 );
cerber_update_set( 'refresh_add_on_list', 1, null, false );
}
register_shutdown_function( function () {
if ( cerber_get_set( 'refresh_add_on_list', null, false ) &&
! defined( 'CRB_POSTPONE_REFRESH' ) ) {
crb_update_add_on_list();
cerber_update_set( 'refresh_add_on_list', 0, null, false );
}
} );
final class CRB_Events {
private static $handlers = array();
private static $addons = array();
private static $addon_files = null;
private static $loaded = array();
/**
* Register a handler for an event
*
* @param string $event
* @param callable $callback
* @param string $addon_id
*
* @return bool
*/
static function add_handler( $event, $callback, $addon_id = null ) {
if ( $addon_id && ! CRB_Addons::is_registered( $addon_id ) ) {
return false;
}
self::$handlers[ $event ][] = $callback;
if ( $addon_id ) {
self::$addons[ $event ][] = $addon_id;
}
return true;
}
static function event_handler( $event, $data ) {
if ( ! isset( self::$addon_files ) ) {
if ( ! self::$addon_files = cerber_get_set( CRB_BOOT_ADDONS ) ) {
self::$addon_files = false;
}
}
if ( ! empty( self::$addon_files[ $event ] )
&& ! isset( self::$loaded[ $event ] ) ) {
ob_start();
self::$loaded[ $event ] = 1; //Avoid processing files for repetitive events
foreach ( self::$addon_files[ $event ] as $addon_file ) {
if ( @file_exists( $addon_file ) ) {
include_once $addon_file;
}
}
ob_end_clean();
}
if ( ! isset( self::$handlers[ $event ] ) ) {
return;
}
foreach ( self::$handlers[ $event ] as $handler ) {
if ( is_callable( $handler ) ) {
call_user_func( $handler, $data );
}
}
}
static function get_addons( $event = null ) {
if ( ! $event ) {
return self::$addons;
}
return crb_array_get( self::$addons, $event, array() );
}
}
final class CRB_Addons {
private static $addons = array();
private static $first = '';
/**
* @param string $file Add-on main PHP file to be invoked in if event occurs
* @param string $addon_id Add-on slug
* @param string $name Name of the add-on
* @param string $requires Version of WP Cerber required
* @param null|array $settings Configuration of the add-on setting fields
* @param null|callable $cb
*
* @return bool
*/
static function register_addon( $file, $addon_id, $name, $requires, $settings = null, $cb = null ) {
if ( isset( self::$addons[ $addon_id ] ) ) {
return false;
}
if ( ! self::$first ) {
self::$first = $addon_id;
}
self::$addons[ $addon_id ] = array(
'file' => $file,
'name' => $name,
'settings' => $settings,
'callback' => $cb
);
return true;
}
/**
* @return array
*/
static function get_all() {
return self::$addons;
}
static function settings_saved( $group, $new_values ) {
if ( ! self::$addons ) {
return;
}
// Detect an add-on from the settings form group name
$len = strlen( CRB_ADDON_SIGN );
if ( substr( $group, 0 - $len ) !== CRB_ADDON_SIGN ) {
return;
}
$len = strlen( $group ) - $len;
$addon_id = substr( $group, 0, $len );
// If this add-on has a callback, call it
if ( ! empty( self::$addons[ $addon_id ]['callback'] ) ) {
call_user_func( self::$addons[ $addon_id ]['callback'], $new_values );
return;
}
}
/**
* @param string $addon
*
* @return bool
*/
static function is_registered( $addon ) {
return isset( self::$addons[ $addon ] );
}
/**
* Is any add-on registered?
*
* @return bool
*/
static function none() {
return empty( self::$first );
}
/**
* @return string
*/
static function get_first() {
return self::$first;
}
/**
* Load code of all active add-ons
*
*/
static function load_active() {
if ( ! $list = cerber_get_set( CRB_BOOT_ADDONS ) ) {
return;
}
foreach ( $list as $files ) {
foreach ( $files as $file ) {
if ( @file_exists( $file ) ) {
include_once $file;
}
}
}
}
}
function crb_event_handler( $event, $data ) {
CRB_Events::event_handler( $event, $data );
return;
}
/////// Admin area pages and settings routines
function crb_addon_admin_page( $page ) {
if ( $page != CRB_ADDON_PAGE ) {
return false;
}
$addons = CRB_Addons::get_all();
if ( ! $addons ) {
return false;
}
$config = array(
'title' => __( 'Add-ons', 'wp-cerber' ),
'callback' => 'cerber_show_settings_form',
);
foreach ( $addons as $id => $addon ) {
$config['tabs'][ $id . CRB_ADDON_SIGN ] = array( 'bx-cog', htmlspecialchars( $addon['name'] ) );
}
return $config;
}
function crb_addon_settings_config( $args ) {
//global $cerber_addons;
$addons = CRB_Addons::get_all();
if ( ! $addons ) {
return false;
}
//if ( $args['screen_id'] == 'add_on_settings' ) {
/*
if ( $args['screen_id'] == CRB_ADDON_PAGE ) {
$addon_id = $cerber_first_addon;
}
else {
$addon_id = $args['screen_id'];
}
echo '======================='.$args['screen_id'].' ++ '.$addon_id;
*/
$settings = array();
//$settings['screens'][CRB_ADDON_PAGE] = array_keys( $cerber_addons[ $addon_id ]['settings'] );
//$settings['sections'] = $cerber_addons[ $addon_id ] = $cerber_addons[ $addon_id ]['settings'];
/*foreach ( $addons as $id => $addon ) {
}*/
$settings = array( 'screens' => array(), 'sections' => array() );
foreach ( $addons as $id => $addon ) {
$settings['screens'][ $id . CRB_ADDON_SIGN ] = array_keys( $addon['settings'] );
$settings['sections'] = array_merge( $settings['sections'], $addon['settings'] );
}
return $settings;
}
function crb_addon_settings_mapper( &$map ) {
if ( CRB_Addons::none() ) {
return;
}
$map[ CRB_ADDON_PAGE ] = CRB_Addons::get_first() . CRB_ADDON_SIGN;
//$map[ CRB_ADDON_PAGE ] = 'add_on_settings';
}