Remove controller stuff, tidy code based on pylint suggestions

lib/tfw/components/fsm_managing_event_handler.py

@@ -33,6 +33,7 @@ class FSMManagingEventHandler(EventHandlerBase):
         return data
 
     def handle_update(self, data):
+        # pylint: disable=no-self-use
         return data
 
 

lib/tfw/components/ide_event_handler.py

@@ -4,7 +4,7 @@
 from os.path import isfile, join, relpath, exists, isdir, realpath
 from glob import glob
 from fnmatch import fnmatchcase
-from collections import Iterable
+from typing import Iterable
 
 from tfw import EventHandlerBase
 from tfw.mixins import MonitorManagerMixin
@@ -103,7 +103,7 @@ class FileManager:  # pylint: disable=too-many-instance-attributes
 
 
 class IdeEventHandler(EventHandlerBase, MonitorManagerMixin):
-    # pylint: disable=too-many-arguments
+    # pylint: disable=too-many-arguments,anomalous-backslash-in-string
     """
     Event handler implementing the backend of our browser based IDE.
     By default all files in the directory specified in __init__ are displayed

lib/tfw/components/terminal_commands.py

@@ -11,6 +11,7 @@ LOG = logging.getLogger(__name__)
 
 
 class TerminalCommands(ABC):
+    # pylint: disable=anomalous-backslash-in-string
     """
     A class you can use to define hooks for terminal commands. This means that you can
     have python code executed when the user enters a specific command to the terminal on

lib/tfw/event_handler_base.py

@@ -120,7 +120,7 @@ class FSMAwareEventHandler(EventHandlerBase, ABC):
     def dispatch_handling(self, message):
         if message['key'] == 'fsm_update':
             self._handle_fsm_update(message)
-        else:
+            return None
         return super().dispatch_handling(message)
 
     def _handle_fsm_update(self, message):

lib/tfw/fsm_base.py

@@ -58,7 +58,6 @@ class FSMBase(Machine, CallbackMixin):
             for predicate in self.trigger_predicates[trigger]
         )
 
-        # TODO: think about what could we do when this prevents triggering
         if all(predicate_results):
             try:
                 self.trigger(trigger)

lib/tfw/mixins/callback_mixin.py

@@ -9,6 +9,7 @@ from tfw.decorators import lazy_property
 class CallbackMixin:
     @lazy_property
     def _callbacks(self):
+        # pylint: disable=no-self-use
         return []
 
     def subscribe_callback(self, callback, *args, **kwargs):

lib/tfw/mixins/observer_mixin.py

@@ -9,6 +9,7 @@ from tfw.decorators import lazy_property
 class ObserverMixin:
     @lazy_property
     def observer(self):
+        # pylint: disable=no-self-use
         return Observer()
 
     def watch(self):

lib/tfw/mixins/supervisor_mixin.py

@@ -13,6 +13,7 @@ from tfw.config import TFWENV
 class SupervisorBaseMixin:
     @lazy_property
     def supervisor(self):
+        # pylint: disable=no-self-use
         return xmlrpc.client.ServerProxy(TFWENV.SUPERVISOR_HTTP_URI).supervisor
 
 

lib/tfw/networking/controller_connector.py

@@ -1,18 +0,0 @@
-# Copyright (C) 2018 Avatao.com Innovative Learning Kft.
-# All Rights Reserved. See LICENSE file for details.
-
-import zmq
-from zmq.eventloop.zmqstream import ZMQStream
-
-from tfw.config import TFWENV
-from tfw.networking import ZMQConnectorBase
-
-
-class ControllerConnector(ZMQConnectorBase):
-    def __init__(self, zmq_context=None):
-        super(ControllerConnector, self).__init__(zmq_context)
-        self._zmq_rep_socket = self._zmq_context.socket(zmq.REP)
-        self._zmq_rep_socket.connect(f'tcp://localhost:{TFWENV.CONTROLLER_PORT}')
-        self._zmq_rep_stream = ZMQStream(self._zmq_rep_socket)
-
-        self.register_callback = self._zmq_rep_stream.on_recv_stream

lib/tfw/networking/server/__init__.py

@@ -3,4 +3,3 @@
 
 from .event_handler_connector import EventHandlerConnector, EventHandlerUplinkConnector, EventHandlerDownlinkConnector
 from .tfw_server import TFWServer
-# from .controller_responder import ControllerResponder  # TODO: readd once controller stuff is resolved

lib/tfw/networking/server/controller_responder.py

@@ -1,38 +0,0 @@
-# Copyright (C) 2018 Avatao.com Innovative Learning Kft.
-# All Rights Reserved. See LICENSE file for details.
-
-from tfw.networking import deserialize_all, serialize_all, ControllerConnector
-
-
-class ControllerResponder:
-    def __init__(self, fsm):
-        self.fsm = fsm
-        self.token = None
-        self.controller_connector = ControllerConnector()
-        self.controller_connector.register_callback(self.handle_controller_request)
-        self.controller_request_handlers = {
-            'solution_check': self.handle_solution_check_request,
-            'test': self.handle_test_request,
-            'token': self.handle_token_request
-        }
-
-    def handle_controller_request(self, stream, msg_parts):
-        key, data = deserialize_all(*msg_parts)
-        response = self.controller_request_handlers[key](data)
-        stream.send_multipart(serialize_all(self.token, response))
-
-    def handle_test_request(self, data):
-        # pylint: disable=unused-argument,no-self-use
-        return 'OK'
-
-    def handle_token_request(self, data):
-        if self.token is None:
-            self.token = data
-        return {'token': self.token}
-
-    def handle_solution_check_request(self, data):
-        # pylint: disable=unused-argument
-        return {
-            'solved': self.fsm.is_solved(),
-            'message': 'solved' if self.fsm.is_solved() else 'not solved'
-        }

lib/tfw/networking/server/tfw_server.py

@@ -29,8 +29,7 @@ class TFWServer:
                 'event_handler_connector': self._event_handler_connector,
                 'message_handlers': [self.handle_trigger, self.handle_recover],
                 'frontend_message_handlers': [self.save_frontend_messages]
-            })]
+            })])
-        )
 
         self._frontend_messages = FrontendMessageStorage()
 
@@ -68,7 +67,7 @@ class MessageStorage(ABC):
     def filter_message(self, message):
         raise NotImplementedError
 
-    def transform_message(self, message):
+    def transform_message(self, message):   # pylint: disable=no-self-use
         yield message
 
 

lib/tfw/networking/server/zmq_websocket_proxy.py

@@ -12,6 +12,7 @@ LOG = logging.getLogger(__name__)
 
 
 class ZMQWebSocketProxy(WebSocketHandler):
+    # pylint: disable=abstract-method
     instances = set()
 
     def initialize(self, **kwargs): # pylint: disable=arguments-differ
@@ -83,6 +84,7 @@ class ZMQWebSocketProxy(WebSocketHandler):
 
 
 class TFWProxy:
+    # pylint: disable=protected-access
     def __init__(self, to_source, to_destination):
         self.to_source = to_source
         self.to_destination = to_destination

lib/tfw/yaml_fsm.py

@@ -52,7 +52,7 @@ class YamlFSM(FSMBase):
             json_obj.pop('predicates')
 
 
-def run_command_async(command, event):
+def run_command_async(command, _):
     Popen(command, shell=True)
 
 
@@ -62,7 +62,7 @@ def command_statuscode_is_zero(command):
 
 class ConfigParser:
     def __init__(self, config_file, jinja2_variables):
-        self.read_variables = singledispatch(self.read_variables)
+        self.read_variables = singledispatch(self._read_variables)
         self.read_variables.register(dict, self._read_variables_dict)
         self.read_variables.register(str, self._read_variables_str)
 
@@ -82,16 +82,14 @@ class ConfigParser:
             return ifile.read()
 
     @staticmethod
-    def read_variables(variables):
+    def _read_variables(variables):
         raise TypeError(f'Invalid variables type {type(variables)}')
 
     @staticmethod
     def _read_variables_str(variables):
-        if isinstance(variables, str):
         with open(variables, 'r') as ifile:
             return yaml.safe_load(ifile)
 
     @staticmethod
     def _read_variables_dict(variables):
         return variables
-