def __init__(self, model, view, queue):
''' Constructor '''
self.queue = queue
self.model = model
self.view = view
self.service_manager = ServiceManager(self.model)
self.model.register_observer(self)
class Controller(object):
'''
Controller class - facade. Steering Model and View.
'''
def __init__(self, model, view, queue):
''' Constructor '''
self.queue = queue
self.model = model
self.view = view
self.service_manager = ServiceManager(self.model)
self.model.register_observer(self)
def run(self):
''' Main function that operates user request and executes it. '''
event = self.get_request()
try:
self.service_manager.authorise(event.auth_operation, event.omit_auth)
self.service_manager.execute_request(event.operation)
except KeyboardInterrupt:
self.model.update(MessageType.ERROR, "Interrupted by user")
#except ArithmeticError as exception:
except Exception as exception:
self.handle_exception(exception)
def get_request(self):
# controller receives arguments from view
event = self.queue.get()
return event
def update(self, mockup):
self.view.display(mockup)
def handle_exception(self, exception):
self.model.update(MessageType.ERROR, str(exception))
self.model.update(MessageType.STATUS_CODE, 1)
sys.exit(1)