@barchart/common-node-js/network/server/endpoints/socket/specialized/SocketEmitterEndpoint.js

Common classes, utilities, and functions for building Node.js servers

const CommandHandler = require('@barchart/common-js/commands/CommandHandler'),
	assert = require('@barchart/common-js/lang/assert'),
	Event = require('@barchart/common-js/messaging/Event');

const Endpoint = require('./../../Endpoint');

module.exports = (() => {
	'use strict';

	const emptyCommand = CommandHandler.fromFunction(() => {
		return;
	});

	const broadcastCommand = CommandHandler.fromFunction(() => {
		return null;
	});

	class SocketEmitterEndpoint extends Endpoint {
		constructor(channel, event, eventType, roomCommand) {
			super(emptyCommand);

			assert.argumentIsRequired(channel, 'channel', String);
			assert.argumentIsRequired(event, 'event', Event, 'Event');
			assert.argumentIsRequired(eventType, 'eventType', String);
			assert.argumentIsOptional(roomCommand, 'roomCommand', CommandHandler, 'CommandHandler');

			this._channel = channel;
			this._event = event;
			this._eventType = eventType || null;
			this._roomCommand = roomCommand || broadcastCommand;
		}

		getChannel() {
			return this._channel;
		}

		getEvent() {
			return this._event;
		}

		getEventType() {
			return this._eventType;
		}

		getRoomCommand() {
			return this._roomCommand;
		}

		toString() {
			return '[SocketEmitterEndpoint]';
		}
	}

	return SocketEmitterEndpoint;
})();