Automatically link previous orders to new WooCommerce customer accounts upon registration

registration-order-link-for-woocommerce.php

<?php
/**
 * Plugin Name: Registration Order Link for WooCommerce
 * Plugin URI: http://skyver.ge/5S
 * Description: Automatically links previous orders to new customer accounts upon WooCommerce registration.
 * Author: SkyVerge
 * Author URI: http://www.skyverge.com/
 * Version: 1.0.0
 * Text Domain: link-wc-orders
 *
 * Copyright: (c) 2016 SkyVerge, Inc. (info@skyverge.com)
 *
 * License: GNU General Public License v3.0
 * License URI: http://www.gnu.org/licenses/gpl-3.0.html
 *
 * @package   WC-Registration-Order-Link
 * @author    SkyVerge
 * @category  Admin
 * @copyright Copyright (c) 2016, SkyVerge, Inc.
 * @license   http://www.gnu.org/licenses/gpl-3.0.html GNU General Public License v3.0
 *
 */

defined( 'ABSPATH' ) or exit;

// Check if WooCommerce is active
if ( ! WC_Registration_Order_Link::is_woocommerce_active() ) {
	return;
}


/**
 * When a customer registers at checkout or via the account, any past orders associated with the
 *  new customer's email are tied to this account automatically.
 *
 * New customers are also shown a message the first time they visit the account to inform them
 *  that old orders have been linked.
 */


// fire it up!
add_action( 'plugins_loaded', 'wc_registration_order_link', 11 );


/** 
 * Main plugin class
 *
 * @since 1.0.0
 */
class WC_Registration_Order_Link {

	const VERSION = '1.0.0';

	/** @var WC_Registration_Order_Link single instance of this plugin */
	protected static $instance;

	public function __construct() {

		// load translations
		add_action( 'init', array( $this, 'load_translation' ) );

		// link previous orders when registering
		add_action( 'woocommerce_created_customer', array( $this, 'link_orders_at_registration' ) );

		// woocommerce_account_dashboard action was added in v2.6
		if ( version_compare( get_option( 'woocommerce_db_version' ), '2.6.0', '<' ) ) {
			add_action( 'woocommerce_before_my_account', array( $this, 'maybe_show_linked_order_count' ), 1 );
		} else {
			add_action( 'woocommerce_account_dashboard', array( $this, 'maybe_show_linked_order_count' ), 1 );
		}

		if ( is_admin() && ! is_ajax() ) {

			// run every time
			$this->install();
		}

	}


	/** Helper methods ***************************************/


	/**
	 * Main WC_Registration_Order_Link Instance, ensures only one instance is/can be loaded
	 *
	 * @since 1.0.0
	 * @see wc_registration_order_link()
	 * @return WC_Registration_Order_Link
 	*/
	public static function instance() {
		if ( is_null( self::$instance ) ) {
			self::$instance = new self();
		}
		return self::$instance;
	}


	/**
	 * Load Translations
	 * TODO: needs a .pot file / folder structure if you want to translate it
	 *
	 * @since 1.0.0
	 */
	public function load_translation() {
		// localization
		load_plugin_textdomain( 'link-wc-orders', false, dirname( plugin_basename( __FILE__ ) ) . '/i18n/languages' );
	}


	/**
	 * Checks if WooCommerce is active
	 *
	 * @since 1.0.0
	 * @return bool true if WooCommerce is active, false otherwise
	 */
	public static function is_woocommerce_active() {

		$active_plugins = (array) get_option( 'active_plugins', array() );

		if ( is_multisite() ) {
			$active_plugins = array_merge( $active_plugins, get_site_option( 'active_sitewide_plugins', array() ) );
		}

		return in_array( 'woocommerce/woocommerce.php', $active_plugins ) || array_key_exists( 'woocommerce/woocommerce.php', $active_plugins );
	}


	/** Plugin methods ***************************************/


	/**
	 * Links previous orders to a new customer upon registration.
	 *
	 * @since 1.0.0
	 * @param int $user_id the ID for the new user
	 */
	public function link_orders_at_registration( $user_id ) {

		$count = wc_update_new_customer_past_orders( $user_id );
		update_user_meta( $user_id, '_wc_linked_order_count', $count );
	}


	/**
	 * Shows the "orders linked" notice upon first account visit if any were linked at registration.
	 *
	 * @since 1.0.0
	 */
	public function maybe_show_linked_order_count() {

		$user_id = get_current_user_id();

		if ( ! $user_id ) {
			return;
		}

		$count = get_user_meta( $user_id, '_wc_linked_order_count', true );

		if ( $count && $count > 0 ) {

			$fname = get_user_by( 'id', $user_id )->first_name;

			$message  = $fname ? sprintf( esc_html__( 'Welcome, %s!', 'link-wc-orders' ), $fname ) : esc_html__( 'Welcome!', 'link-wc-orders' );
			$message .= ' ' . esc_html__( sprintf( _n( 'Your previous order has been linked to this account.', 'Your previous %s orders have been linked to this account.', $count, 'link-wc-orders' ), $count ) );
			$message .= ' <a class="button" href="' . esc_url( wc_get_endpoint_url( 'orders' ) ) . '">' . esc_html__( 'View Orders', 'link-wc-orders' ) . '</a>';

			wc_print_notice( $message, 'notice' );
			delete_user_meta( $user_id, '_wc_linked_order_count' );
		}
	}


	/** Lifecycle methods ***************************************/


	/**
	 * Run every time.  Used since the activation hook is not executed when updating a plugin
	 *
	 * @since 1.0.0
	 */
	private function install() {

		// get current version to check for upgrade
		$installed_version = get_option( 'wc_registration_order_link_version' );

		// force upgrade to 1.0.0
		if ( ! $installed_version ) {
			update_option( 'wc_registration_order_link_version', '1.0.0' );
		}
	}


}


/**
 * Returns the One True Instance of WC_Registration_Order_Link
 *
 * @since 1.0.0
 * @return WC_Registration_Order_Link
 */
function wc_registration_order_link() {
    return WC_Registration_Order_Link::instance();
}

Hello and good day.
I am using Memberful to register a new user and it creates new users on the backend.
Will this plugin still work when Member creates a new user? I had run a test and it seems it does not work.

Thank you and have an amazing day!

Hi @bekarice , thanks for this amazing plugin but can you please
tell me how can i also sync billing adresses from the last order that the customer made
do you have any idea how to auto fill user adresses fields from the last order billing informations on user registeration ??
thanks in advance

I think that this will solve my problem. However my question is where to install it, and can i have it run in the background for all customers?

Hi @bekarice, than you for that plugin, I've tried to install it on a website but nothing changed. Should I do something different to make it work? Thank you in advance.

@jasonfreemanmke did you find a way to make it work?

Looks like you just have to download the ZIP file and "add new plugin" and point to the zip file.

The better question is has this been tested up to the latest version of WC, and can this be placed in the Wordpress plugin site and maintained for updates?

Hi, I've already tried that way but nothing changed, I think the plugin is not updated or there is something else to do. Maybe I should add the snippet directly on the php func. as described in the article that @bekarice did on skyverge website