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<?php |
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require_once dirname( __FILE__ ) . '/class.jetpack-sync-deflate-codec.php'; |
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require_once dirname( __FILE__ ) . '/class.jetpack-sync-queue.php'; |
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class Jetpack_Sync_Client { |
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static $default_options_whitelist = array( 'stylesheet', '/^theme_mods_.*$/' ); |
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static $default_constants_whitelist = array(); |
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private $sync_queue; |
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private $codec; |
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private $options_whitelist; |
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private $constants_whitelist; |
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private $meta_types = array( 'post' ); |
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// singleton functions |
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private static $instance; |
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public static function getInstance() { |
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if (null === static::$instance) { |
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static::$instance = new static(); |
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} |
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return static::$instance; |
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} |
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// this is necessary because you can't use "new" when you declare instance properties >:( |
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protected function __construct() { |
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$this->sync_queue = new Jetpack_Sync_Queue( 'sync', 100 ); |
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$this->codec = new Jetpack_Sync_Deflate_Codec(); |
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$this->options_whitelist = self::$default_options_whitelist; |
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$this->init(); |
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} |
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private function init() { |
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$handler = array( $this, 'action_handler' ); |
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// posts |
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add_action( 'wp_insert_post', $handler, 10, 3 ); |
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add_action( 'deleted_post', $handler, 10 ); |
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// comments |
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add_action( 'wp_insert_comment', $handler, 10, 2 ); |
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add_action( 'deleted_comment', $handler, 10 ); |
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add_action( 'trashed_comment', $handler, 10 ); |
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add_action( 'spammed_comment', $handler, 10 ); |
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// even though it's messy, we implement these hooks because |
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// the edit_comment hook doesn't include the data |
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// so this saves us a DB read for every comment event |
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foreach ( array( '', 'trackback', 'pingback' ) as $comment_type ) { |
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foreach ( array( 'unapproved', 'approved' ) as $comment_status ) { |
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add_action( "comment_{$comment_status}_{$comment_type}", $handler, 10, 2 ); |
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} |
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} |
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// options |
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add_action( 'added_option', $handler, 10, 2 ); |
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add_action( 'updated_option', $handler, 10, 3 ); |
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add_action( 'deleted_option', $handler, 10, 1 ); |
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// themes |
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add_action( 'jetpack_sync_current_theme_support', $handler, 10 ); // custom hook, see meta-hooks below |
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add_action( 'jetpack_sync_current_constants', $handler, 10 ); |
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// post-meta, and in the future - other meta? |
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foreach ( $this->meta_types as $meta_type ) { |
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// we need to make sure we don't commit before we receive these, |
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// because they're invoked after meta changes are saved to the DB |
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add_action( "added_{$meta_type}_meta", $handler, 99, 4 ); |
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add_action( "updated_{$meta_type}_meta", $handler, 99, 4 ); |
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add_action( "deleted_{$meta_type}_meta", $handler, 99, 4 ); |
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} |
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/** |
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* Other hooks - fire synthetic hooks for all the properties we need to sync, |
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* e.g. when a theme changes |
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*/ |
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// themes |
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add_action( 'switch_theme', array( $this, 'switch_theme_handler' ) ); |
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} |
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function set_options_whitelist( $options ) { |
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$this->options_whitelist = $options; |
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} |
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function set_constants_whitelist( $constants ) { |
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$this->constants_whitelist = $constants; |
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} |
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function is_whitelisted_option( $option ) { |
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foreach ( $this->options_whitelist as $whitelisted_option ) { |
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if ( $whitelisted_option[0] === '/' && preg_match( $whitelisted_option, $option ) ) { |
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return true; |
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} elseif ( $whitelisted_option === $option ) { |
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return true; |
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} |
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} |
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return false; |
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} |
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function set_codec( iJetpack_Sync_Codec $codec ) { |
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$this->codec = $codec; |
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} |
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function set_sync_queue( $queue ) { |
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$this->sync_queue = $queue; |
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} |
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function action_handler() { |
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$current_filter = current_filter(); |
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$args = func_get_args(); |
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if ( $current_filter === 'wp_insert_post' && $args[1]->post_type === 'revision' ) { |
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return; |
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} |
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if ( in_array( $current_filter, array( 'deleted_option', 'added_option', 'updated_option' ) ) |
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&& |
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! $this->is_whitelisted_option( $args[0] ) ) { |
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return; |
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} |
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Jetpack_Sync::schedule_sync(); |
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$this->sync_queue->add( array( |
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$current_filter, |
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$args |
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) ); |
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} |
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function switch_theme_handler() { |
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global $_wp_theme_features; |
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do_action( 'jetpack_sync_current_theme_support', $_wp_theme_features ); |
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} |
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function do_sync() { |
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$this->maybe_sync_constants(); |
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// TODO: only send buffer once, then do the rest in a cron job |
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$iters = 0; |
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while ( ( $buffer = $this->sync_queue->checkout() ) && $iters < 100 ) { |
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if ( !$buffer ) { |
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// buffer has no items |
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return; |
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} |
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if ( is_wp_error( $buffer) ) { |
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error_log("Error fetching buffer: ".$buffer->get_error_message()); |
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return; |
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} |
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$data = $this->codec->encode( $buffer->get_items() ); |
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/** |
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* Fires when data is ready to send to the server. |
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* Return false or WP_Error to abort the sync (e.g. if there's an error) |
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* The items will be automatically re-sent later |
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* |
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* @since 4.1 |
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* |
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* @param array $data The action buffer |
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*/ |
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$result = apply_filters( 'jetpack_sync_client_send_data', $data ); |
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if ( !$result || is_wp_error( $result ) ) { |
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$this->sync_queue->checkin( $buffer ); |
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} else { |
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$this->sync_queue->close( $buffer ); |
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} |
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$iters += 1; |
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} |
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} |
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private function maybe_sync_constants() { |
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$constants = $this->get_all_constants(); |
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$constants_check_sum = $this->get_check_sum( $constants ); |
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$check_sum_option = 'jetpack_constants_sync_checksum'; |
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if ( $constants_check_sum !== get_option( $check_sum_option ) ) { |
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do_action( 'jetpack_sync_current_constants', $constants ); |
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update_option( $check_sum_option, $constants_check_sum ); |
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} |
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} |
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private function get_all_constants() { |
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return array_combine( |
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$this->constants_whitelist, |
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array_map( array( $this, 'get_constant' ), $this->constants_whitelist ) |
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); |
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} |
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private function get_constant( $constant ) { |
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if ( defined( $constant ) ) { |
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return constant( $constant ); |
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} |
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return null; |
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} |
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private function get_check_sum( $values ) { |
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return crc32( serialize( $values ) ); |
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} |
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function get_actions() { |
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// TODO: we should only send a bit at a time, flush_all sends everything |
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return $this->sync_queue->flush_all(); |
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} |
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function get_all_actions() { |
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return $this->sync_queue->get_all(); |
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} |
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function reset_state() { |
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$this->codec = new Jetpack_Sync_Deflate_Codec(); |
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$this->constants_whitelist = self::$default_constants_whitelist; |
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$this->options_whitelist = self::$default_options_whitelist; |
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$this->sync_queue->reset(); |
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} |
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} |
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The PSR-2 coding standard requires that all properties in a class have their visibility explicitly declared. If you declare a property using
the property is implicitly global.
To learn more about the PSR-2, please see the PHP-FIG site on the PSR-2.