Add order complete action to WooCommerce My Orders customer table

if ( ! function_exists( 'wcj_add_my_account_order_actions' ) ) {
	/*
	 * wcj_add_my_account_order_actions.
	 */
	function wcj_add_my_account_order_actions( $actions, $order ) {
		if ( 'completed' != $order->get_status() ) {
			$actions['wcj_mark_completed_by_customer'] = array(
				'url'  => wp_nonce_url( add_query_arg( array(
					'wcj_action' => 'wcj_woocommerce_mark_order_status',
					'order_id'   => $order->get_id() ) ), 'wcj-woocommerce-mark-order-status' ),
				'name' => __( 'Complete', 'woocommerce-jetpack' ),
			);
		}
		return $actions;
	}
}
add_filter( 'woocommerce_my_account_my_orders_actions', 'wcj_add_my_account_order_actions', 10, 2 );
if ( ! function_exists( 'wcj_add_js_conformation' ) ) {
	/*
	 * wcj_add_js_conformation.
	 */
	function wcj_add_js_conformation() {
		echo '';
	}
}
add_action( 'wp_footer', 'wcj_add_js_conformation' );
if ( ! function_exists( 'wcj_woocommerce_mark_order_status' ) ) {
	/*
	 * wcj_woocommerce_mark_order_status.
	 */
	function wcj_woocommerce_mark_order_status() {
		if ( isset( $_GET['wcj_action'] ) && 'wcj_woocommerce_mark_order_status' === $_GET['wcj_action'] && isset( $_GET['order_id'] ) && isset( $_GET['_wpnonce'] ) ) {
			if ( wp_verify_nonce( $_GET['_wpnonce'], 'wcj-woocommerce-mark-order-status' ) ) {
				$_order = wc_get_order( $_GET['order_id'] );
				if ( $_order->get_customer_id() === get_current_user_id() ) {
					$_order->update_status( 'completed' );
					wp_safe_redirect( remove_query_arg( array( 'wcj_action', 'order_id', '_wpnonce' ) ) );
					exit;
				}
			}
		}
	}
}
add_action( 'init', 'wcj_woocommerce_mark_order_status' );