White/blacklist fix (#258)

* White/blacklist fix

White/blacklist fix to also allow for empty whitelist, and positioned after the Identity MAC/IRK section to allow for Identity MACs to be included in white or blacklists

* Whitelist prioritisation

TheengsGateway/ble_gateway.py

@@ -458,15 +458,18 @@ def detection_callback(
         """Detect device in received advertisement data."""
         logger.debug("%s:%s", device.address, advertisement_data)
 
+        # Try to resolve private addresses with known IRKs
+        address = self.rpa2id(device.address)
+
         if (
-            device.address not in self.configuration["whitelist"]
-            or device.address in self.configuration["blacklist"]
+            address not in self.configuration["whitelist"]
+            and self.configuration["whitelist"] != []
+        ) or (
+            address in self.configuration["blacklist"]
+            and address not in self.configuration["whitelist"]
         ):
             return
 
-        # Try to resolve private addresses with known IRKs
-        address = self.rpa2id(device.address)
-
         # Try to add the device to dictionary of clocks to synchronize time.
         self.add_clock(address)