I have a custom button associated to the products related list in the deals module. When products are added, I can check the boxes next to the products I want, a Create a Quote button appears at the top of the products list and when clicked the quote opens. Everything is working as designed except for one part:

Here is the script. Can someone tell me what is missing to specifically to add only the checked products to the quote?

potDetails = zoho.crm.getRecordById("Deals",potIdStr.toLong());
quotesubject = ifnull(potDetails.get("Deal_Name"),"");
contact = ifnull(potDetails.get("Contact_Name").get("id"),"");
account = ifnull(potDetails.get("Account_Name").get("id"),"");
description = ifnull(potDetails.get("Description"),"");
RelatedProducts = zoho.crm.getRelatedRecords("Products","Potentials",potIdStr.toLong());
product_items = List();
sub = 0.0;
for each  product in RelatedProducts
{
    proid = product.get("id");
    proname = product.get("Product_Name");
    productDesc = ifnull(product.get("Description"),"Manque Description Produit !!!");
    quantity = 1;
    price = ifnull(product.get("Unit_Price"),"0.0").toDecimal();
    listprice = price * quantity;
    lineitem = Map();
    lineitem.put("product",{"name":proname,"id":proid});
    lineitem.put("product_description",productDesc);
    lineitem.put("quantity",quantity);
    lineitem.put("net_total",listprice);
    lineitem.put("total",listprice);
    lineitem.put("list_price",listprice);
    sub = sub + listprice;
    product_items.add(lineitem);
}
paramap = Map();
paramap.put("Product_Details",product_items);
paramap.put("Subject",quotesubject);
paramap.put("Contact_Name",contact);
paramap.put("Account_Name",account);
paramap.put("Deal_Name",potIdStr.toLong());
paramap.put("Sub_Total",sub);
paramap.put("Grand_Total",sub);
paramap.put("Description",description);
createResp = zoho.crm.createRecord("Quotes",paramap);
info createResp;
newid = createResp.get("id");
openUrl(" https://crm.zoho.com/crm/org648779890/tab/Quotes/" + newid,"same window");
return "Success! Refresh the page to populate new quote in the list below.";