overleaf/services/real-time/app/coffee/Router.coffee

Metrics = require "metrics-sharelatex"
logger = require "logger-sharelatex"
WebsocketController = require "./WebsocketController"

module.exports = Router =
	configure: (app, io, session) ->
		session.on 'connection', (error, client, session) ->
			if error?
				logger.err err: error, "error when client connected"
				client?.disconnect()
				return
			
			Metrics.inc('socket-io.connection')
			
			logger.log session: session, "got session"
			
			user = session.user
			if !user? or !user._id?
				logger.log "terminating session without authenticated user"
				client.disconnect()
				return
				
			client.on "joinProject", (data = {}, callback) ->
				WebsocketController.joinProject(client, user, data?.project_id, callback)