gettingn affiliate token from url params

Author: khalid-deriv

src/javascript/app/common/deriv_banner.js

@@ -3,8 +3,6 @@ const getElementById = require('../../_common/common_functions').getElementById;
 const createElement  = require('../../_common/utility').createElement;
 const getLanguage       = require('../../_common/language').get;
 
-const affiliate_token = Cookies.getJSON('affiliate_tracking');
-
 const DerivBanner = (() => {
     let el_multiplier_banner_container,
         el_close_button,
@@ -14,13 +12,23 @@ const DerivBanner = (() => {
         const is_deriv_banner_dismissed = localStorage.getItem('is_deriv_banner_dismissed');
 
         if (!is_deriv_banner_dismissed) {
+            const affiliate_cookie = Cookies.getJSON('affiliate_tracking');
+            let affiliate_token;
+
+            if (affiliate_cookie) affiliate_token = affiliate_cookie.t;
+            else {
+                const queryString = window.location.search;
+                const urlParams = new URLSearchParams(queryString);
+                affiliate_token = urlParams.get('t');
+            }
+            
             el_multiplier_banner_container = getElementById('multiplier_banner_container');
             multiplier_link = getElementById('multiplier-link');
 
             const lang = getLanguage().toLowerCase();
             const multiplier_href = `https://deriv.com/${lang}/trade-types/multiplier/?utm_source=binary&utm_medium=referral&utm_campaign=ww-banner-deriv-1020-en&utm_content=multiplier-banner-synthetic-indices-amplified`;
 
-            multiplier_link.href = affiliate_token ? `${multiplier_href}&t=${affiliate_token.t}` : multiplier_href;
+            multiplier_link.href = affiliate_token ? `${multiplier_href}&t=${affiliate_token}` : multiplier_href;
 
             el_multiplier_banner_container.setVisibility(1);
             el_close_button = el_multiplier_banner_container.querySelector('.deriv_banner_close') || createElement('div');