Username show

loon/mqtt/handlers/show_username_request.py

@@ -0,0 +1,32 @@
+import json
+
+from sqlmodel import Session, select
+
+from loon.web.db import engine
+from loon.web.users.models import User
+
+
+async def show_username_handler(client, userdata, msg, data):
+    prefix = "loon/auth/show_username/"
+
+    if not msg.topic.startswith(prefix):
+        return
+
+    rest = msg.topic[len(prefix):]
+    uuid, _, subtopic = rest.partition("/")
+
+    if not uuid or subtopic:
+        return
+
+    with Session(engine) as session:
+        user = session.exec(select(User).where(User.uuid == uuid)).first()
+
+        if user is None:
+            client.publish(f"loon/auth/show_username/{uuid}/response",
+                           json.dumps({"success": False, "error": "The user is not registered!"}))
+            return
+
+        internal_username = user.internal_username
+
+    client.publish(f"loon/auth/show_username/{uuid}/response",
+                   json.dumps({"success": True, "error": None, "internalUsername": internal_username}))