feat: pivot from cookie attributes to cookie removal in serverless state with cookies example

Author: stern-shawn

serverless/examples/cookies/state-long/state-long-function.js renamed to serverless/examples/cookies/clear-state/clear-state-function.js

@@ -3,34 +3,32 @@ exports.handler = (context, event, callback) => {
   const response = new Twilio.Response();
   const twiml = new Twilio.twiml.MessagingResponse();
 
+  // Since we're returning TwiML, the content type must be XML
+  response.appendHeader('Content-Type', 'text/xml');
+
   // Cookies are accessed by name from the event.request.cookies object
   // If the user doesn't have a count yet, initialize it to zero. Cookies are
   // always strings, so you'll need to convert the count to a number
   const count = Number(event.request.cookies.count) || 0;
 
+  if (count > 5) {
+    twiml.message("You've reached the end of the count!");
+    // In this case we want to remove the count and let the user begin
+    // a new conversation
+    response.setBody(twiml.toString()).removeCookie('count');
+    // Use an early return to respond to the user and avoid other logic paths
+    return callback(null, response);
+  }
+
   // Return a dynamic message based on if this is the first message or not
   const message =
     count > 0
       ? `Your current count is ${count}`
-      : 'Hello, thanks for the new message!';
+      : 'Hello, thanks for the new message! Message again to see your count update.';
 
   twiml.message(message);
 
-  response
-    // Add the stringified TwiML to the response body
-    .setBody(twiml.toString())
-    // Since we're returning TwiML, the content type must be XML
-    .appendHeader('Content-Type', 'text/xml')
-    // You can increment the count state for the next message, or any other
-    // operation that makes sense for your application's needs. Use the
-    // third argument of setCookie to set cookie attributes, such as making
-    // count last for the max of 4 hours instead of the default 1 hour
-    .setCookie('count', (count + 1).toString(), [
-      'HttpOnly',
-      'Secure',
-      'SameSite=Strict',
-      'Max-Age=14400',
-    ]);
+  response.setBody(twiml.toString()).setCookie('count', (count + 1).toString());
 
   return callback(null, response);
 };

serverless/examples/cookies/clear-state/meta.json

@@ -0,0 +1,5 @@
+{
+    "title": "Clear counter state from an SMS conversation",
+    "type": "server"
+}
+