handle opt out emails

Author: eiman-eltigani-ttd

web-integrations/prebid-integrations/client-server/README.md

@@ -6,28 +6,13 @@ For the client-side Prebid.js integration example, see [../client-side](../clien
 
 > **NOTE:** While the server side of this example is implemented in JavaScript using Node.js, it is not a requirement. You can use any technology of your choice and refer to this example for illustration of the functionality that needs to be implemented.
 
-## Prerequisites
-
-- Node.js (version 20.x or later recommended)
-- UID2 API credentials (API Key and Client Secret)
-- A local UID2 Operator instance **OR** access to the UID2 integration environment
 
 ## Run Locally for Testing
 
 ### 1. Set Up Environment Variables
 
 Create a `.env` file in the **root of the uid2-examples repository** (not in this folder) with the following variables:
 
-```bash
-# UID2 Operator configuration
-UID2_BASE_URL=http://localhost:8080
-UID2_API_KEY=your-api-key-here
-UID2_CLIENT_SECRET=your-client-secret-here
-
-# Port for this example (optional, defaults to 3000)
-PORT=3005
-```
-
 **For local operator testing:**
 - Use `UID2_BASE_URL=http://localhost:8080`
 - Use API credentials from your local operator's configuration

web-integrations/prebid-integrations/client-server/public/index.html

@@ -113,22 +113,26 @@
             body: JSON.stringify({ email: email })
           });
 
+          const data = await response.json();
+
+          // Check for opt-out (server returns 400 with status: 'optout')
           if (!response.ok) {
-            const errorData = await response.json();
-            console.error('Token generation failed:', errorData);
-            alert('Failed to generate UID2 token: ' + (errorData.error || 'Unknown error'));
+            if (data.status === 'optout') {
+              console.log('User has opted out');
+              localStorage.setItem(UID2_STORAGE_KEY, JSON.stringify({ status: 'optout' }));
+              currentIdentity = null;
+              updateGuiElements();
+              return;
+            }
+            // Other errors
+            console.error('Token generation failed:', data);
+            alert('Failed to generate UID2 token: ' + (data.error || 'Unknown error'));
             return;
           }
 
-          const data = await response.json();
           console.log('UID2 token received:', data);
 
-          // Check for opt-out
-          if (data.identity && data.identity.advertising_token === 'optout') {
-            console.log('User has opted out');
-            localStorage.setItem(UID2_STORAGE_KEY, JSON.stringify({ status: 'optout' }));
-            currentIdentity = null;
-          } else if (data.identity) {
+          if (data.identity) {
             // Store the identity
             currentIdentity = data.identity;
             localStorage.setItem(UID2_STORAGE_KEY, JSON.stringify(currentIdentity));