Python RiveScript.on方法代码示例

# 需要导入模块: from rivescript import RiveScript [as 别名]
# 或者: from rivescript.RiveScript import on [as 别名]
class RiveBot(object):
	"""An example RiveScript bot using callbacks to manage user session data.

	This example assumes single user per RiveScript instance and as
	such it's suitable for use in stateless services (e.g. in web apps
	receiving webhooks). Just init, get reply and teardown. Of course,
	it will also work in RTM implementations with custom longer-lived 
	bot threads.

	Session state is persisted to a single JSON file. This wouldn't be 
	thread-safe in a concurrent environment (e.g. web server). In such
	case it would be recommended to subclass SessionStore and implement
	database persistence (preferably via one of great Python ORMs such
	as SQLAlchemy or peewee).
	"""
	def __init__(self, script_dir, user, ss, debug=False):
		self._user     = user
		self._redirect = None

		# init RiveScript
		self._rs = RiveScript(debug=debug)
		self._rs.load_directory(script_dir)
		self._rs.sort_replies()

		# restore session
		if isinstance(ss, SessionStore):
			self._ss = ss
		else:
			raise RuntimeError("RiveBot init error: provided session store object is not a SessionStore instance.")

		self._restore_session()

		# register event callbacks
		self._rs.on('topic',    self._topic_cb)
		self._rs.on('uservar',  self._uservar_cb)

	def _topic_cb(self, user, topic, redirect=None):
		"""Topic callback.

		This is a single-user-per-rive (stateless instance) scenario; in a multi-user
		scenario within a single thread, callback functions should delegate the 
		execution to proper user session objects.
		"""
		log.debug("Topic callback: user={}, topic={}, redirect={}".format(user, topic, redirect))
		self._session.set_topic(topic, redirect)

	def _uservar_cb(self, user, name, value):
		"""Topic callback. See comment for `_topic_cb()`"""
		log.debug("User variable callback: user={}, name={}, value={}".format(user, name, value))
		self._session.set_variable(name, value)		

	def _restore_session(self):
		self._session = self._ss.load(self._user)

		# set saved user variables
		for name, value in self._session.variables():
			self._rs.set_uservar(self._user, name, value)

		# set saved topic
		topic = self._session.get_topic()
		if topic:
			if '/' in topic:
				topic, self._redirect = topic.split('/')
			self._rs.set_topic(self._user, topic)

	def _save_session(self):
		self._ss.save(self._session)

	def run(self):
		log.info("RiveBot starting...")
		if self._redirect:
			# Repeat saved redirect so that the user gets the context
			# after session restart.
			redir_reply = self._rs.redirect(self._user, self._redirect)
			print("bot> Welcome back!")
			print("bot>", redir_reply)

		while True:
		    msg = raw_input("{}> ".format(self._user))
		    if msg == '/quit':
		        self.stop()
		        break
		    reply = self._rs.reply(self._user, msg)
		    print("bot>", reply)

	def stop(self):
		log.info("RiveBot shutting down...")
		print("\nbot> Bye.")
		self._save_session()