Move FSMAware to a separate file in networking

lib/tfw/event_handler_base.py

@@ -3,8 +3,9 @@
 
 from abc import ABC, abstractmethod
 
+from tfw.networking import FSMAware
 from tfw.networking.event_handlers import ServerConnector
-from tfw.crypto import message_checksum, KeyManager, verify_message
+from tfw.crypto import message_checksum
 from tfw.config.logs import logging
 
 LOG = logging.getLogger(__name__)
@@ -106,37 +107,6 @@ class EventHandlerBase(ABC):
         pass
 
 
-class FSMAware:
-    def __init__(self):
-        self.fsm_state = None
-        self.fsm_in_accepted_state = False
-        self._auth_key = KeyManager().auth_key
-
-    def update_fsm_data(self, message):
-        if message['key'] == 'fsm_update' and verify_message(self._auth_key, message):
-            self._handle_fsm_update(message)
-            return True
-        return False
-
-    def _handle_fsm_update(self, message):
-        try:
-            new_state = message['data']['current_state']
-            if self.fsm_state != new_state:
-                self.handle_fsm_step(**(message['data']))
-            self.fsm_state = new_state
-            self.fsm_in_accepted_state = message['data']['in_accepted_state']
-        except KeyError:
-            LOG.error('Invalid fsm_update message received!')
-
-    def handle_fsm_step(self, **kwargs):
-        """
-        Called in case the TFW FSM has stepped.
-
-        :param kwargs: fsm_update 'data' field
-        """
-        pass
-
-
 class FSMAwareEventHandler(EventHandlerBase, FSMAware, ABC):
     # pylint: disable=abstract-method
     """

lib/tfw/networking/__init__.py

@@ -7,3 +7,4 @@ from .zmq_connector_base import ZMQConnectorBase
 from .message_sender import MessageSender
 from .event_handlers.server_connector import ServerUplinkConnector as TFWServerConnector
 from .server.tfw_server import TFWServer
+from .fsm_aware import FSMAware

lib/tfw/networking/fsm_aware.py

@@ -0,0 +1,45 @@
+# Copyright (C) 2018 Avatao.com Innovative Learning Kft.
+# All Rights Reserved. See LICENSE file for details.
+
+from tfw.crypto import KeyManager, verify_message
+
+from tfw.config.logs import logging
+
+LOG = logging.getLogger(__name__)
+
+
+class FSMAware:
+    """
+    Base class for stuff that has to be aware of the framework FSM.
+    This is done by processing 'fsm_update' messages.
+    """
+    def __init__(self):
+        self.fsm_state = None
+        self.fsm_in_accepted_state = False
+        self.fsm_last_update = None
+        self._auth_key = KeyManager().auth_key
+
+    def update_fsm_data(self, message):
+        if message['key'] == 'fsm_update' and verify_message(self._auth_key, message):
+            self._handle_fsm_update(message)
+            return True
+        return False
+
+    def _handle_fsm_update(self, message):
+        try:
+            new_state = message['data']['current_state']
+            if self.fsm_state != new_state:
+                self.handle_fsm_step(**(message['data']))
+            self.fsm_state = new_state
+            self.fsm_in_accepted_state = message['data']['in_accepted_state']
+            self.fsm_last_update = message['data']
+        except KeyError:
+            LOG.error('Invalid fsm_update message received!')
+
+    def handle_fsm_step(self, **kwargs):
+        """
+        Called in case the TFW FSM has stepped.
+
+        :param kwargs: fsm_update 'data' field
+        """
+        pass