Use SignalData on server-side

This should not cause compile issues when simple-peer is not installed
(because client-side JS will be precompiled after pkg is published in
NPM repository) because types are not used in runtime.

src/client/actions/PeerActions.ts

@@ -2,7 +2,7 @@ import * as ChatActions from '../actions/ChatActions'
 import * as NotifyActions from '../actions/NotifyActions'
 import * as StreamActions from '../actions/StreamActions'
 import * as constants from '../constants'
-import Peer from 'simple-peer'
+import Peer, { SignalData } from 'simple-peer'
 import forEach from 'lodash/forEach'
 import _debug from 'debug'
 import { play, iceServers } from '../window'
@@ -42,7 +42,7 @@ class PeerHandler {
     peer && peer.destroy()
     dispatch(removePeer(user.id))
   }
-  handleSignal = (signal: unknown) => {
+  handleSignal = (signal: SignalData) => {
     const { socket, user } = this
     debug('peer: %s, signal: %o', user.id, signal)
 

src/server/app.ts

@@ -33,5 +33,6 @@ router.use('/', index)
 app.use(BASE_URL, router)
 
 io.on('connection', socket => handleSocket(socket, io))
+io.sockets.adapter.rooms['test'].sockets
 
 export default server

src/server/socket.test.ts

@@ -1,6 +1,7 @@
 import { EventEmitter } from 'events'
+import { Socket } from 'socket.io'
+import { TypedIO } from '../shared'
 import handleSocket from './socket'
-import { Socket, Server } from 'socket.io'
 
 describe('server/socket', () => {
   type SocketMock = Socket & {
@@ -12,7 +13,7 @@ describe('server/socket', () => {
   }
 
   let socket: SocketMock
-  let io: Server & {
+  let io: TypedIO  & {
     in: jest.Mock<(room: string) => SocketMock>
     to: jest.Mock<(room: string) => SocketMock>
   }

src/shared/SocketEvent.ts

@@ -1,4 +1,5 @@
 import { TypedEmitter, TypedEmitterKeys } from './TypedEmitter'
+import { SignalData } from 'simple-peer'
 
 export interface User {
   id: string
@@ -12,7 +13,7 @@ export interface SocketEvent {
   signal: {
     userId: string
     // eslint-disable-next-line
-    signal: any
+    signal: SignalData
   }
   connect: undefined
   disconnect: undefined