Added hub timer

src/hub.py

@@ -57,6 +57,22 @@ def _pub_key(cli, msg):
         return False
 
 
+timers = {}
+
+def timer_start(msg): 
+    # the ID is always between 0 and 1
+    now = time.time()
+    name = msg['to'] + msg['id']
+    timers[name] = now
+
+def timer_stop(msg):
+    now = time.time()
+    name = msg['from'] + msg['id']
+    if name in timers:
+        with open('time_differences', 'w') as f:
+            f.write(f'{msg["from"]},{now - timers[name]}')
+
+
 def _cli_pubs(coll):
     res = {}
     if len(coll) == 0:
@@ -104,6 +120,7 @@ def ext_msg(client, server, message):
             print('\tTo internal client')
             int_srv.send_message(i_client.ws, message)
         else:
+            timer_start(msg)
             iot_srv.send_message(iot_devs[msg['to']].ws, message)
             print('\tTo IoT device')
 
@@ -136,6 +153,7 @@ def iot_msg(client, server, message):
             iot.new = False
     else:
         if i_client is not None:
+            timer_stop(msg)
             int_srv.send_message(i_client.ws, message)
             print('\tInternal client safe to send to.')
         else: