ENT-1052 discount by enterprise catalog

lms/djangoapps/commerce/utils.py

@@ -111,9 +111,14 @@ class EcommerceService(object):
             http://localhost:8002/basket/add/?sku=5H3HG5&sku=57FHHD&bundle=3bdf1dd1-49be-4a15-9145-38901f578c5a
         """
         program_uuid = kwargs.get('program_uuid')
-        url = '{checkout_page_path}?{skus}'.format(
+        enterprise_catalog_uuid = kwargs.get('enterprise_customer_catalog_uuid')
+        query_params = {'sku': skus}
+        if enterprise_catalog_uuid:
+            query_params.update({'enterprise_customer_catalog_uuid': enterprise_catalog_uuid})
+
+        url = '{checkout_page_path}?{query_params}'.format(
             checkout_page_path=self.get_absolute_ecommerce_url(self.config.basket_checkout_page),
-            skus=urlencode({'sku': skus}, doseq=True),
+            query_params=urlencode(query_params, doseq=True),
         )
         if program_uuid:
             url = '{url}&bundle={program_uuid}'.format(