WC_Vendors Woocommerce restrict buying from multiple vendors

gistfile1.txt

add_action('woocommerce_add_to_cart', 'custom_add_to_cart');

function custom_add_to_cart() {

    global $woocommerce;
    $items = $woocommerce->cart->get_cart();
    $cart_products = array();
    $remove_this_items = array();

    //Get all the items in the cart
    foreach($items as $item => $values) {
        $cart_products[] = $values['product_id'];
    }

    $last_product_added_to_cart = end($cart_products);
    $last_product_added_to_cart_vendor_id = WCV_Vendors::get_vendor_from_product( $last_product_added_to_cart );


    for ($i=0; $i <= count($cart_products); $i++) {

            if(WCV_Vendors::get_vendor_from_product($cart_products[$i]) > 0){

                if(WCV_Vendors::get_vendor_from_product($cart_products[$i]) != $last_product_added_to_cart_vendor_id){

                        foreach ( $items as $cart_item_key => $cart_item ){

                                if($cart_item['product_id'] == $cart_products[$i]){

                                        WC()->cart->remove_cart_item( $cart_item_key );
                                }


                        }

                }


            }

    }
}