add url validity

app.py

@@ -10,6 +10,7 @@ from guard import Guardian
 import random
 import threading
 from timing import TimeManager
+from validity import is_valid_rpm_url
 
 api_key = os.getenv("API_KEY_OPENROUTER")
 client = OpenAI(base_url="https://openrouter.ai/api/v1", api_key=api_key)
@@ -46,7 +47,9 @@ def join_show(avatar_url):
         your guest_name for the talk show and info about your situation
 
     """
-    # TODO: Validate the URL
+    if not is_valid_rpm_url(avatar_url):
+        return "Invalid Avatar URL! Please make sure you are using a Ready Player Me .glb avatar URL."
+    
     payload = {"avatar_url": avatar_url}
     headers = {"Content-Type": "application/json", "x-api-key": api_key_unreal}
     response = requests.post(

validity.py

@@ -0,0 +1,5 @@
+import re
+
+def is_valid_rpm_url(url: str) -> bool:
+    pattern = r"^https://models\.readyplayer\.me/[0-9a-fA-F]+\.glb$"
+    return bool(re.match(pattern, url))