<?php

class Jetpack_Sync_Module_Updates extends Jetpack_Sync_Module {
	function name() {
		return 'updates';
	}

	public function init_listeners( $callable ) {
		add_action( 'set_site_transient_update_plugins', $callable, 10, 1 );
		add_action( 'set_site_transient_update_themes', $callable, 10, 1 );
		add_action( 'set_site_transient_update_core', $callable, 10, 1 );

		add_filter( 'jetpack_sync_before_enqueue_set_site_transient_update_plugins', array(
			$this,
			'filter_update_keys',
		), 10, 2 );
		add_filter( 'jetpack_sync_before_enqueue_upgrader_process_complete', array(
			$this,
			'filter_upgrader_process_complete',
		), 10, 2 );
	}

	public function init_full_sync_listeners( $callable ) {
		add_action( 'jetpack_full_sync_updates', $callable );
	}

	public function init_before_send() {
		// full sync
		add_filter( 'jetpack_sync_before_send_jetpack_full_sync_updates', array( $this, 'expand_updates' ) );
	}

	public function enqueue_full_sync_actions( $config ) {
		/**
		 * Tells the client to sync all updates to the server
		 *
		 * @since 4.2.0
		 *
		 * @param boolean Whether to expand updates (should always be true)
		 */
		do_action( 'jetpack_full_sync_updates', true );

		return 1; // The number of actions enqueued
	}

	public function estimate_full_sync_actions( $config ) {
		return 1;
	}

	function get_full_sync_actions() {
		return array( 'jetpack_full_sync_updates' );
	}

	public function get_all_updates() {
		return array(
			'core' => get_site_transient( 'update_core' ),
			'plugins' => get_site_transient( 'update_plugins' ),
			'themes' => get_site_transient( 'update_themes' ),
		);
	}

	// removes unnecessary keys from synced updates data
	function filter_update_keys( $args ) {
		$updates = $args[0];

		if ( isset( $updates->no_update ) ) {
			unset( $updates->no_update );
		}

		return $args;
	}

	function filter_upgrader_process_complete( $args ) {
		array_shift( $args );

		return $args;
	}

	public function expand_updates( $args ) {
		if ( $args[0] ) {
			return $this->get_all_updates();
		}

		return $args;
	}
}