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<?php
/**
* Callables sync module.
*
* @package automattic/jetpack-sync
*/
namespace Automattic\Jetpack\Sync\Modules;
use Automattic\Jetpack\Constants as Jetpack_Constants;
use Automattic\Jetpack\Sync\Dedicated_Sender;
use Automattic\Jetpack\Sync\Defaults;
use Automattic\Jetpack\Sync\Functions;
use Automattic\Jetpack\Sync\Settings;
/**
* Class to handle sync for callables.
*/
class Callables extends Module {
/**
* Name of the callables checksum option.
*
* @var string
*/
const CALLABLES_CHECKSUM_OPTION_NAME = 'jetpack_callables_sync_checksum';
/**
* Name of the transient for locking callables.
*
* @var string
*/
const CALLABLES_AWAIT_TRANSIENT_NAME = 'jetpack_sync_callables_await';
/**
* Whitelist for callables we want to sync.
*
* @access private
*
* @var array
*/
private $callable_whitelist;
/**
* For some options, we should always send the change right away!
*
* @access public
*
* @var array
*/
const ALWAYS_SEND_UPDATES_TO_THESE_OPTIONS = array(
'jetpack_active_modules',
'home', // option is home, callable is home_url.
'siteurl',
'jetpack_sync_error_idc',
'paused_plugins',
'paused_themes',
);
const ALWAYS_SEND_UPDATES_TO_THESE_OPTIONS_NEXT_TICK = array(
'stylesheet',
);
/**
* Setting this value to true will make it so that the callables will not be unlocked
* but the lock will be removed after content is send so that callables will be
* sent in the next request.
*
* @var bool
*/
private $force_send_callables_on_next_tick = false;
/**
* For some options, the callable key differs from the option name/key
*
* @access public
*
* @var array
*/
const OPTION_NAMES_TO_CALLABLE_NAMES = array(
// @TODO: Audit the other option names for differences between the option names and callable names.
'home' => 'home_url',
'siteurl' => 'site_url',
'jetpack_active_modules' => 'active_modules',
);
/**
* Sync module name.
*
* @access public
*
* @return string
*/
public function name() {
return 'functions';
}
/**
* Set module defaults.
* Define the callable whitelist based on whether this is a single site or a multisite installation.
*
* @access public
*/
public function set_defaults() {
if ( is_multisite() ) {
$this->callable_whitelist = array_merge( Defaults::get_callable_whitelist(), Defaults::get_multisite_callable_whitelist() );
} else {
$this->callable_whitelist = Defaults::get_callable_whitelist();
}
$this->force_send_callables_on_next_tick = false; // Resets here as well mostly for tests.
}
/**
* Initialize callables action listeners.
*
* @access public
*
* @param callable $callable Action handler callable.
*/
public function init_listeners( $callable ) {
add_action( 'jetpack_sync_callable', $callable, 10, 2 );
add_action( 'current_screen', array( $this, 'set_plugin_action_links' ), 9999 ); // Should happen very late.
foreach ( self::ALWAYS_SEND_UPDATES_TO_THESE_OPTIONS as $option ) {
add_action( "update_option_{$option}", array( $this, 'unlock_sync_callable' ) );
add_action( "delete_option_{$option}", array( $this, 'unlock_sync_callable' ) );
}
foreach ( self::ALWAYS_SEND_UPDATES_TO_THESE_OPTIONS_NEXT_TICK as $option ) {
add_action( "update_option_{$option}", array( $this, 'unlock_sync_callable_next_tick' ) );
add_action( "delete_option_{$option}", array( $this, 'unlock_sync_callable_next_tick' ) );
}
// Provide a hook so that hosts can send changes to certain callables right away.
// Especially useful when a host uses constants to change home and siteurl.
add_action( 'jetpack_sync_unlock_sync_callable', array( $this, 'unlock_sync_callable' ) );
// get_plugins and wp_version
// gets fired when new code gets installed, updates etc.
add_action( 'upgrader_process_complete', array( $this, 'unlock_plugin_action_link_and_callables' ) );
add_action( 'update_option_active_plugins', array( $this, 'unlock_plugin_action_link_and_callables' ) );
}
/**
* Initialize callables action listeners for full sync.
*
* @access public
*
* @param callable $callable Action handler callable.
*/
public function init_full_sync_listeners( $callable ) {
add_action( 'jetpack_full_sync_callables', $callable );
}
/**
* Initialize the module in the sender.
*
* @access public
*/
public function init_before_send() {
add_action( 'jetpack_sync_before_send_queue_sync', array( $this, 'maybe_sync_callables' ) );
// Full sync.
add_filter( 'jetpack_sync_before_send_jetpack_full_sync_callables', array( $this, 'expand_callables' ) );
}
/**
* Perform module cleanup.
* Deletes any transients and options that this module uses.
* Usually triggered when uninstalling the plugin.
*
* @access public
*/
public function reset_data() {
delete_option( self::CALLABLES_CHECKSUM_OPTION_NAME );
delete_transient( self::CALLABLES_AWAIT_TRANSIENT_NAME );
$url_callables = array( 'home_url', 'site_url', 'main_network_site_url' );
foreach ( $url_callables as $callable ) {
delete_option( Functions::HTTPS_CHECK_OPTION_PREFIX . $callable );
}
}
/**
* Set the callable whitelist.
*
* @access public
*
* @param array $callables The new callables whitelist.
*/
public function set_callable_whitelist( $callables ) {
$this->callable_whitelist = $callables;
}
/**
* Get the callable whitelist.
*
* @access public
*
* @return array The callables whitelist.
*/
public function get_callable_whitelist() {
return $this->callable_whitelist;
}
/**
* Retrieve all callables as per the current callables whitelist.
*
* @access public
*
* @return array All callables.
*/
public function get_all_callables() {
// get_all_callables should run as the master user always.
$current_user_id = get_current_user_id();
wp_set_current_user( \Jetpack_Options::get_option( 'master_user' ) );
$callables = array_combine(
array_keys( $this->get_callable_whitelist() ),
array_map( array( $this, 'get_callable' ), array_values( $this->get_callable_whitelist() ) )
);
wp_set_current_user( $current_user_id );
return $callables;
}
/**
* Invoke a particular callable.
* Used as a wrapper to standartize invocation.
*
* @access private
*
* @param callable $callable Callable to invoke.
* @return mixed Return value of the callable, null if not callable.
*/
private function get_callable( $callable ) {
if ( is_callable( $callable ) ) {
return call_user_func( $callable );
} else {
return null;
}
}
/**
* Enqueue the callable actions for full sync.
*
* @access public
*
* @param array $config Full sync configuration for this sync module.
* @param int $max_items_to_enqueue Maximum number of items to enqueue.
* @param boolean $state True if full sync has finished enqueueing this module, false otherwise.
* @return array Number of actions enqueued, and next module state.
*/
public function enqueue_full_sync_actions( $config, $max_items_to_enqueue, $state ) { // phpcs:ignore VariableAnalysis.CodeAnalysis.VariableAnalysis.UnusedVariable
/**
* Tells the client to sync all callables to the server
*
* @since 1.6.3
* @since-jetpack 4.2.0
*
* @param boolean Whether to expand callables (should always be true)
*/
do_action( 'jetpack_full_sync_callables', true );
// The number of actions enqueued, and next module state (true == done).
return array( 1, true );
}
/**
* Send the callable actions for full sync.
*
* @access public
*
* @param array $config Full sync configuration for this sync module.
* @param int $send_until The timestamp until the current request can send.
* @param array $status This Module Full Sync Status.
*
* @return array This Module Full Sync Status.
*/
public function send_full_sync_actions( $config, $send_until, $status ) { // phpcs:ignore VariableAnalysis.CodeAnalysis.VariableAnalysis.UnusedVariable
// we call this instead of do_action when sending immediately.
$this->send_action( 'jetpack_full_sync_callables', array( true ) );
// The number of actions enqueued, and next module state (true == done).
return array( 'finished' => true );
}
/**
* Retrieve an estimated number of actions that will be enqueued.
*
* @access public
*
* @param array $config Full sync configuration for this sync module.
* @return array Number of items yet to be enqueued.
*/
public function estimate_full_sync_actions( $config ) { // phpcs:ignore VariableAnalysis.CodeAnalysis.VariableAnalysis.UnusedVariable
return 1;
}
/**
* Retrieve the actions that will be sent for this module during a full sync.
*
* @access public
*
* @return array Full sync actions of this module.
*/
public function get_full_sync_actions() {
return array( 'jetpack_full_sync_callables' );
}
/**
* Unlock callables so they would be available for syncing again.
*
* @access public
*/
public function unlock_sync_callable() {
delete_transient( self::CALLABLES_AWAIT_TRANSIENT_NAME );
}
/**
* Unlock callables on the next tick.
* Sometime the true callable values are only present on the next tick.
* When switching themes for example.
*
* @access public
*/
public function unlock_sync_callable_next_tick() {
$this->force_send_callables_on_next_tick = true;
}
/**
* Unlock callables and plugin action links.
*
* @access public
*/
public function unlock_plugin_action_link_and_callables() {
delete_transient( self::CALLABLES_AWAIT_TRANSIENT_NAME );
delete_transient( 'jetpack_plugin_api_action_links_refresh' );
add_filter( 'jetpack_check_and_send_callables', '__return_true' );
}
/**
* Parse and store the plugin action links if on the plugins page.
*
* @uses \DOMDocument
* @uses libxml_use_internal_errors
* @uses mb_convert_encoding
*
* @access public
*/
public function set_plugin_action_links() {
if (
! class_exists( '\DOMDocument' ) ||
! function_exists( 'libxml_use_internal_errors' ) ||
! function_exists( 'mb_convert_encoding' )
) {
return;
}
$current_screeen = get_current_screen();
$plugins_action_links = array();
// Is the transient lock in place?
$plugins_lock = get_transient( 'jetpack_plugin_api_action_links_refresh', false );
if ( ! empty( $plugins_lock ) && ( isset( $current_screeen->id ) && 'plugins' !== $current_screeen->id ) ) {
return;
}
$plugins = array_keys( Functions::get_plugins() );
foreach ( $plugins as $plugin_file ) {
/**
* Plugins often like to unset things but things break if they are not able to.
*/
$action_links = array(
'deactivate' => '',
'activate' => '',
'details' => '',
'delete' => '',
'edit' => '',
);
/** This filter is documented in src/wp-admin/includes/class-wp-plugins-list-table.php */
$action_links = apply_filters( 'plugin_action_links', $action_links, $plugin_file, null, 'all' );
/** This filter is documented in src/wp-admin/includes/class-wp-plugins-list-table.php */
$action_links = apply_filters( "plugin_action_links_{$plugin_file}", $action_links, $plugin_file, null, 'all' );
// Verify $action_links is still an array to resolve warnings from filters not returning an array.
if ( is_array( $action_links ) ) {
$action_links = array_filter( $action_links );
} else {
$action_links = array();
}
$formatted_action_links = null;
if ( ! empty( $action_links ) && count( $action_links ) > 0 ) {
$dom_doc = new \DOMDocument();
foreach ( $action_links as $action_link ) {
// The @ is not enough to suppress errors when dealing with libxml,
// we have to tell it directly how we want to handle errors.
libxml_use_internal_errors( true );
$dom_doc->loadHTML( mb_convert_encoding( $action_link, 'HTML-ENTITIES', 'UTF-8' ) );
libxml_use_internal_errors( false );
$link_elements = $dom_doc->getElementsByTagName( 'a' );
if ( 0 === $link_elements->length ) {
continue;
}
$link_element = $link_elements->item( 0 );
// phpcs:ignore WordPress.NamingConventions.ValidVariableName.UsedPropertyNotSnakeCase
if ( $link_element->hasAttribute( 'href' ) && $link_element->nodeValue ) {
$link_url = trim( $link_element->getAttribute( 'href' ) );
// Add the full admin path to the url if the plugin did not provide it.
$link_url_scheme = wp_parse_url( $link_url, PHP_URL_SCHEME );
if ( empty( $link_url_scheme ) ) {
$link_url = admin_url( $link_url );
}
// phpcs:ignore WordPress.NamingConventions.ValidVariableName.UsedPropertyNotSnakeCase
$formatted_action_links[ $link_element->nodeValue ] = $link_url;
}
}
}
if ( $formatted_action_links ) {
$plugins_action_links[ $plugin_file ] = $formatted_action_links;
}
}
// Cache things for a long time.
set_transient( 'jetpack_plugin_api_action_links_refresh', time(), DAY_IN_SECONDS );
update_option( 'jetpack_plugin_api_action_links', $plugins_action_links );
}
/**
* Whether a certain callable should be sent.
*
* @access public
*
* @param array $callable_checksums Callable checksums.
* @param string $name Name of the callable.
* @param string $checksum A checksum of the callable.
* @return boolean Whether to send the callable.
*/
public function should_send_callable( $callable_checksums, $name, $checksum ) {
$idc_override_callables = array(
'main_network_site',
'home_url',
'site_url',
);
if ( in_array( $name, $idc_override_callables, true ) && \Jetpack_Options::get_option( 'migrate_for_idc' ) ) {
return true;
}
return ! $this->still_valid_checksum( $callable_checksums, $name, $checksum );
}
/**
* Sync the callables if we're supposed to.
*
* @access public
*/
public function maybe_sync_callables() {
$callables = $this->get_all_callables();
if ( ! apply_filters( 'jetpack_check_and_send_callables', false ) ) {
/**
* Treating Dedicated Sync requests a bit differently from normal. We want to send callables
* normally with all Sync actions, no matter if they were with admin action origin or not,
* since Dedicated Sync runs out of bound and the requests are never coming from an admin.
*/
if ( ! is_admin() && ! Dedicated_Sender::is_dedicated_sync_request() ) {
// If we're not an admin and we're not doing cron and this isn't WP_CLI, don't sync anything.
if ( ! Settings::is_doing_cron() && ! Jetpack_Constants::get_constant( 'WP_CLI' ) ) {
return;
}
// If we're not an admin and we are doing cron, sync the Callables that are always supposed to sync ( See https://github.com/Automattic/jetpack/issues/12924 ).
$callables = $this->get_always_sent_callables();
}
if ( get_transient( self::CALLABLES_AWAIT_TRANSIENT_NAME ) ) {
if ( $this->force_send_callables_on_next_tick ) {
$this->unlock_sync_callable();
}
return;
}
}
if ( empty( $callables ) ) {
return;
}
// No need to set the transiant we are trying to remove it anyways.
if ( ! $this->force_send_callables_on_next_tick ) {
set_transient( self::CALLABLES_AWAIT_TRANSIENT_NAME, microtime( true ), Defaults::$default_sync_callables_wait_time );
}
$callable_checksums = (array) \Jetpack_Options::get_raw_option( self::CALLABLES_CHECKSUM_OPTION_NAME, array() );
$has_changed = false;
// Only send the callables that have changed.
foreach ( $callables as $name => $value ) {
$checksum = $this->get_check_sum( $value );
// Explicitly not using Identical comparison as get_option returns a string.
if ( $value !== null && $this->should_send_callable( $callable_checksums, $name, $checksum ) ) {
// Only send callable if the non sorted checksum also does not match.
if ( $this->should_send_callable( $callable_checksums, $name, $this->get_check_sum( $value, false ) ) ) {
/**
* Tells the client to sync a callable (aka function) to the server
*
* @param string The name of the callable
* @param mixed The value of the callable
*
* @since 1.6.3
* @since-jetpack 4.2.0
*/
do_action( 'jetpack_sync_callable', $name, $value );
}
$callable_checksums[ $name ] = $checksum;
$has_changed = true;
} else {
$callable_checksums[ $name ] = $checksum;
}
}
if ( $has_changed ) {
\Jetpack_Options::update_raw_option( self::CALLABLES_CHECKSUM_OPTION_NAME, $callable_checksums );
}
if ( $this->force_send_callables_on_next_tick ) {
$this->unlock_sync_callable();
}
}
/**
* Get the callables that should always be sent, e.g. on cron.
*
* @return array Callables that should always be sent
*/
protected function get_always_sent_callables() {
$callables = $this->get_all_callables();
$cron_callables = array();
foreach ( self::ALWAYS_SEND_UPDATES_TO_THESE_OPTIONS as $option_name ) {
if ( array_key_exists( $option_name, $callables ) ) {
$cron_callables[ $option_name ] = $callables[ $option_name ];
continue;
}
// Check for the Callable name/key for the option, if different from option name.
if ( array_key_exists( $option_name, self::OPTION_NAMES_TO_CALLABLE_NAMES ) ) {
$callable_name = self::OPTION_NAMES_TO_CALLABLE_NAMES[ $option_name ];
if ( array_key_exists( $callable_name, $callables ) ) {
$cron_callables[ $callable_name ] = $callables[ $callable_name ];
}
}
}
return $cron_callables;
}
/**
* Expand the callables within a hook before they are serialized and sent to the server.
*
* @access public
*
* @param array $args The hook parameters.
* @return array $args The hook parameters.
*/
public function expand_callables( $args ) {
if ( $args[0] ) {
$callables = $this->get_all_callables();
$callables_checksums = array();
foreach ( $callables as $name => $value ) {
$callables_checksums[ $name ] = $this->get_check_sum( $value );
}
\Jetpack_Options::update_raw_option( self::CALLABLES_CHECKSUM_OPTION_NAME, $callables_checksums );
return $callables;
}
return $args;
}
/**
* Return Total number of objects.
*
* @param array $config Full Sync config.
*
* @return int total
*/
public function total( $config ) { // phpcs:ignore VariableAnalysis.CodeAnalysis.VariableAnalysis.UnusedVariable
return count( $this->get_callable_whitelist() );
}
/**
* Retrieve a set of callables by their IDs.
*
* @access public
*
* @param string $object_type Object type.
* @param array $ids Object IDs.
* @return array Array of objects.
*/
public function get_objects_by_id( $object_type, $ids ) {
if ( empty( $ids ) || empty( $object_type ) || 'callable' !== $object_type ) {
return array();
}
$objects = array();
foreach ( (array) $ids as $id ) {
$object = $this->get_object_by_id( $object_type, $id );
if ( 'CALLABLE-DOES-NOT-EXIST' !== $object ) {
if ( 'all' === $id ) {
// If all was requested it contains all options and can simply be returned.
return $object;
}
$objects[ $id ] = $object;
}
}
return $objects;
}
/**
* Retrieve a callable by its name.
*
* @access public
*
* @param string $object_type Type of the sync object.
* @param string $id ID of the sync object.
* @return mixed Value of Callable.
*/
public function get_object_by_id( $object_type, $id ) {
if ( 'callable' === $object_type ) {
// Only whitelisted options can be returned.
if ( array_key_exists( $id, $this->get_callable_whitelist() ) ) {
// requires master user to be in context.
$current_user_id = get_current_user_id();
wp_set_current_user( \Jetpack_Options::get_option( 'master_user' ) );
$callable = $this->get_callable( $this->callable_whitelist[ $id ] );
wp_set_current_user( $current_user_id );
return $callable;
} elseif ( 'all' === $id ) {
return $this->get_all_callables();
}
}
return 'CALLABLE-DOES-NOT-EXIST';
}
}