@mathquis/node-assistant-protocol/src/traits/stateful.js

Assistant protocol decorator for Hermes protocol

module.exports = (hermes, logger) => {
	return (topic, object) => {
		return {
			...object,
			state: async (online = false, attributes = {}, state = {}) => {
				logger.debug('%s state (online: %s)', object.name, online)
				const payload = {online, attributes, state}
				const options = {retain: true}
				await hermes.publish(topic, hermes.serialize(payload), options)
			},
			onState: handler => {
				return hermes.on(topic, handler)
			},
			getLastWill: () => {
				return {
					topic,
					payload: hermes.serialize({online: false, attributes: {}, state: {}}),
					retain: true
				}
			}
		}
	}
}