don't track more than one cart per session

cart_tracking_once_per_session.php

<?php
add_action('woocommerce_new_order','rnoc_woocommerce_new_order',10,1);
function rnoc_woocommerce_new_order($order_id){
	$no_of_orders_in_session = rnoc_orders_per_session_count();
	WC()->session->set('rnoc_orders_per_session_count',$no_of_orders_in_session + 1);
}

add_filter('rnoc_can_track_abandoned_carts','rnoc_can_track_abandoned_carts',20);
function rnoc_can_track_abandoned_carts($can_track){
	$no_of_orders_in_session = rnoc_orders_per_session_count();
	if($no_of_orders_in_session > 0){
		$can_track = false;
	}
	return $can_track;
}

add_action('rnoc_before_recreate_cart','rnoc_before_recreate_cart');
function rnoc_before_recreate_cart($cart_data){
	WC()->session->set('rnoc_orders_per_session_count',0);
}


function rnoc_orders_per_session_count(){
	return intval(WC()->session->get('rnoc_orders_per_session_count',0));
}