Generating SmartCardRemoveEvent as well when a scard is removed

platypush/backend/scard/__init__.py

@@ -3,6 +3,7 @@ import json
 
 from smartcard.CardType import AnyCardType, ATRCardType
 from smartcard.CardRequest import CardRequest
+from smartcard.Exceptions import NoCardException
 from smartcard.util import toHexString
 
 from platypush.backend import Backend
@@ -68,8 +69,10 @@ class ScardBackend(Backend):
                     self.bus.post(SmartCardDetectedEvent(atr=atr, reader=reader))
                     prev_atr = atr
             except Exception as e:
+                if isinstance(e, NoCardException):
+                    prev_atr = None
+                    self.bus.post(SmartCardRemovedEvent())
                 logging.exception(e)
-                prev_atr = None
 
 
 # vim:sw=4:ts=4:et:

platypush/message/event/scard.py

@@ -6,5 +6,10 @@ class SmartCardDetectedEvent(Event):
         super().__init__(atr=atr, reader=reader, *args, **kwargs)
 
 
+class SmartCardRemovedEvent(Event):
+    def __init__(self, *args, **kwargs):
+        super().__init__(*args, **kwargs)
+
+
 # vim:sw=4:ts=4:et: