mirror of
https://github.com/avatao-content/baseimage-tutorial-framework
synced 2024-09-29 10:31:34 +00:00
51 lines
1.5 KiB
Python
51 lines
1.5 KiB
Python
import logging
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from tfw.internals.crypto import KeyManager, sign_message
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from tfw.internals.networking import Scope
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from .fsm_updater import FSMUpdater
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LOG = logging.getLogger(__name__)
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class FSMHandler:
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keys = ['fsm']
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def __init__(self, *, fsm_type, initial_trigger):
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self.fsm = fsm_type()
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self._fsm_updater = FSMUpdater(self.fsm)
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self.auth_key = KeyManager().auth_key
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self.initial_trigger = initial_trigger
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self.command_handlers = {
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'frontend.ready': self.handle_ready,
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'fsm.step' : self.handle_step,
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'fsm.announce' : self.handle_announce
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}
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def start(self):
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self.connector.subscribe('frontend.ready')
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def handle_event(self, message, connector):
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try:
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message = self.command_handlers[message['key']](message)
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if message:
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fsm_update_message = self._fsm_updater.fsm_update
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sign_message(self.auth_key, fsm_update_message)
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connector.send_message(fsm_update_message, Scope.BROADCAST)
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except KeyError:
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LOG.error('IGNORING MESSAGE: Invalid message received: %s', message)
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def handle_ready(self, message):
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self.fsm.step(self.initial_trigger)
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self.connector.unsubscribe('frontend.ready')
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return message
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def handle_step(self, message):
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if self.fsm.step(message['trigger']):
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return message
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def handle_announce(self, message):
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# pylint: disable=no-self-use
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return message
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