add_action('woocommerce_add_to_cart', 'custome_add_to_cart');

remove_action('woocommerce_add_to_cart', __FUNCTION__);

if(isset($_REQUEST['add-to-cart'])){
   $productId = $_REQUEST['add-to-cart'];
}else{
   $productId = $_REQUEST['product_id'];
}


$can_be_addded = false;
//check if product already in cart
if ( sizeof( WC()->cart->get_cart() ) > 0 ) {

    foreach ( WC()->cart->get_cart() as $cart_item_key => $values ) {

        $_product = $values['data'];
        //type of cart of first item
        $cart_type = get_post_meta($_product->id,'_point_base',true);
        //type of product that is requested to add in cart
        $type_of_new_item = get_post_meta($productId,'_point_base',true);

        if ($cart_type == 'yes'  && $type_of_new_item == 'yes' )
            $can_be_addded = true;

        if (($cart_type == 'no' || $cart_type == '' ) && ($type_of_new_item == 'no' || $type_of_new_item == '')) {
            $can_be_addded = true;
        }
        break;
    }

    // if product not found, add it
    if ($can_be_addded){

        WC()->cart->add_to_cart( $productId );
    }else{

           wc_add_notice('Product cant be added','error');
    }

} else {
    // if no products in cart, add it
    WC()->cart->add_to_cart( $productId );
}