[core] start stop typing in the example

examples/python/whatsapp_echo_bot.py

@@ -1,4 +1,6 @@
+import random
 from pprint import pprint
+from time import sleep
 
 import requests
 from flask import Flask
@@ -49,6 +51,30 @@ def send_seen(chat_id, message_id, participant):
     )
     response.raise_for_status()
 
+def start_typing(chat_id):
+    response = requests.post(
+        "http://localhost:3000/api/startTyping",
+        json={
+            "session": "default",
+            "chatId": chat_id,
+        },
+    )
+    response.raise_for_status()
+
+def stop_typing(chat_id):
+    response = requests.post(
+        "http://localhost:3000/api/stopTyping",
+        json={
+            "session": "default",
+            "chatId": chat_id,
+        },
+    )
+    response.raise_for_status()
+
+def typing(chat_id, seconds):
+    start_typing(chat_id=chat_id)
+    sleep(seconds)
+    stop_typing(chat_id=chat_id)
 
 @app.route("/")
 def whatsapp_echo():
@@ -69,7 +95,12 @@ def whatsapp_webhook():
     # Payload that we've got
     payload = data["payload"]
     # The text
-    text = payload["body"]
+    text = payload.get("body")
+    if not text:
+        # We can't process non-text messages yet
+        print("No text in message")
+        print(payload)
+        return "OK"
     # Number in format 1231231231@c.us or @g.us for group
     chat_id = payload["from"]
     # Message ID - false_11111111111@c.us_AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
@@ -79,9 +110,13 @@ def whatsapp_webhook():
     # IMPORTANT - Always send seen before sending new message
     send_seen(chat_id=chat_id, message_id=message_id, participant=participant)
 
+
     # Send a text back via WhatsApp HTTP API
+    typing(chat_id=chat_id, seconds=random.random() * 3)
     send_message(chat_id=chat_id, text=text)
+
     # OR reply on the message
+    typing(chat_id=chat_id, seconds=random.random() * 3)
     reply(chat_id=chat_id, message_id=message_id, text=text)
 
     # Send OK back