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import { Server as HTTPServer } from 'http'
import { Namespace, Server as SocketServer, Socket } from 'socket.io'
import { isIdValid } from '@server/helpers/custom-validators/misc'
import { MVideo, MVideoImmutable } from '@server/types/models'
import { UserNotificationModelForApi } from '@server/types/models/user'
import { LiveVideoEventPayload, LiveVideoEventType } from '@shared/models'
import { logger } from '../helpers/logger'
import { authenticateSocket } from '../middlewares'
class PeerTubeSocket {
private static instance: PeerTubeSocket
private userNotificationSockets: { [ userId: number ]: Socket[] } = {}
private liveVideosNamespace: Namespace
private constructor () {}
init (server: HTTPServer) {
const io = new SocketServer(server)
io.of('/user-notifications')
.use(authenticateSocket)
.on('connection', socket => {
const userId = socket.handshake.auth.user.id
logger.debug('User %d connected on the notification system.', userId)
if (!this.userNotificationSockets[userId]) this.userNotificationSockets[userId] = []
this.userNotificationSockets[userId].push(socket)
socket.on('disconnect', () => {
logger.debug('User %d disconnected from SocketIO notifications.', userId)
this.userNotificationSockets[userId] = this.userNotificationSockets[userId].filter(s => s !== socket)
})
})
this.liveVideosNamespace = io.of('/live-videos')
.on('connection', socket => {
socket.on('subscribe', ({ videoId }) => {
if (!isIdValid(videoId)) return
/* eslint-disable @typescript-eslint/no-floating-promises */
socket.join(videoId)
})
socket.on('unsubscribe', ({ videoId }) => {
if (!isIdValid(videoId)) return
/* eslint-disable @typescript-eslint/no-floating-promises */
socket.leave(videoId)
})
})
}
sendNotification (userId: number, notification: UserNotificationModelForApi) {
const sockets = this.userNotificationSockets[userId]
if (!sockets) return
logger.debug('Sending user notification to user %d.', userId)
const notificationMessage = notification.toFormattedJSON()
for (const socket of sockets) {
socket.emit('new-notification', notificationMessage)
}
}
sendVideoLiveNewState (video: MVideo) {
const data: LiveVideoEventPayload = { state: video.state }
const type: LiveVideoEventType = 'state-change'
logger.debug('Sending video live new state notification of %s.', video.url, { state: video.state })
this.liveVideosNamespace
.in(video.id)
.emit(type, data)
}
sendVideoViewsUpdate (video: MVideoImmutable, numViewers: number) {
const data: LiveVideoEventPayload = { viewers: numViewers, views: numViewers }
const type: LiveVideoEventType = 'views-change'
logger.debug('Sending video live views update notification of %s.', video.url, { viewers: numViewers })
this.liveVideosNamespace
.in(video.id)
.emit(type, data)
}
static get Instance () {
return this.instance || (this.instance = new this())
}
}
// ---------------------------------------------------------------------------
export {
PeerTubeSocket
}
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