mirror of
https://github.com/avatao-content/baseimage-tutorial-framework
synced 2024-11-06 00:01:20 +00:00
83 lines
2.4 KiB
Python
83 lines
2.4 KiB
Python
# Copyright (C) 2018 Avatao.com Innovative Learning Kft.
|
|
# All Rights Reserved. See LICENSE file for details.
|
|
|
|
from abc import ABC, abstractmethod
|
|
|
|
from tfw.networking import deserialize_tfw_msg
|
|
from tfw.networking.event_handlers import ServerConnector
|
|
|
|
|
|
class EventHandlerBase(ABC):
|
|
def __init__(self, key):
|
|
self.server_connector = ServerConnector()
|
|
self.key = key
|
|
self.subscriptions = set()
|
|
self.subscribe(self.key)
|
|
self.subscribe('reset')
|
|
self.server_connector.register_callback(self.event_handler_callback)
|
|
|
|
def event_handler_callback(self, msg_parts):
|
|
message = deserialize_tfw_msg(*msg_parts)
|
|
response = self.dispatch_handling(message)
|
|
response['key'] = message['key']
|
|
if response is None:
|
|
return
|
|
self.server_connector.send(response)
|
|
|
|
@abstractmethod
|
|
def dispatch_handling(self, message):
|
|
raise NotImplementedError
|
|
|
|
def _dispatch_handling(self, message):
|
|
# pylint: disable=no-else-return
|
|
if message['key'] != 'reset':
|
|
return self.handle_event(message)
|
|
else:
|
|
return self.handle_reset(message)
|
|
|
|
@abstractmethod
|
|
def handle_event(self, message):
|
|
raise NotImplementedError
|
|
|
|
def handle_reset(self, message):
|
|
# pylint: disable=unused-argument,no-self-use
|
|
return None
|
|
|
|
def cleanup(self):
|
|
pass
|
|
|
|
def subscribe(self, key):
|
|
if key not in self.subscriptions:
|
|
self.subscriptions.add(key)
|
|
self.server_connector.subscribe(key)
|
|
|
|
def unsubscribe(self, key):
|
|
try:
|
|
self.subscriptions.remove(key)
|
|
self.server_connector.unsubscribe(key)
|
|
except KeyError:
|
|
pass
|
|
|
|
def unsubscribe_all(self):
|
|
for sub in self.subscriptions:
|
|
self.server_connector.unsubscribe(key=sub)
|
|
self.subscriptions.clear()
|
|
|
|
|
|
class TriggerlessEventHandler(EventHandlerBase, ABC):
|
|
# pylint: disable=abstract-method
|
|
def dispatch_handling(self, message):
|
|
return self._dispatch_handling(message)
|
|
|
|
|
|
class TriggeredEventHandler(EventHandlerBase, ABC):
|
|
# pylint: disable=abstract-method
|
|
def __init__(self, key, trigger):
|
|
super().__init__(key)
|
|
self.trigger = trigger
|
|
|
|
def dispatch_handling(self, message):
|
|
if message.get('trigger') == self.trigger:
|
|
return self._dispatch_handling(message)
|
|
return None
|