File size: 2,188 Bytes
00a912e | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 | import { nanoid } from 'nanoid'
import { config } from '../config.js'
interface RejoinTicket {
token: string
roomId: string
userId: string
expiresAt: number
}
const tickets = new Map<string, RejoinTicket>()
const roomUserIndex = new Map<string, Set<string>>()
function roomUserKey(roomId: string, userId: string): string {
return `${roomId}:${userId}`
}
function pruneExpired(): void {
const now = Date.now()
for (const [token, ticket] of tickets) {
if (ticket.expiresAt <= now) {
tickets.delete(token)
const key = roomUserKey(ticket.roomId, ticket.userId)
const set = roomUserIndex.get(key)
if (set) {
set.delete(token)
if (set.size === 0) roomUserIndex.delete(key)
}
}
}
}
export function issueRejoinTicket(roomId: string, userId: string): { token: string; expiresAt: number } {
pruneExpired()
const token = nanoid(36)
const expiresAt = Date.now() + config.rejoin.ttlMs
const ticket: RejoinTicket = { token, roomId, userId, expiresAt }
tickets.set(token, ticket)
const key = roomUserKey(roomId, userId)
const set = roomUserIndex.get(key) ?? new Set<string>()
set.add(token)
roomUserIndex.set(key, set)
return { token, expiresAt }
}
export function consumeRejoinTicket(token: string, roomId: string, userId: string): boolean {
pruneExpired()
const ticket = tickets.get(token)
if (!ticket) return false
if (ticket.roomId !== roomId || ticket.userId !== userId) return false
tickets.delete(token)
const key = roomUserKey(roomId, userId)
const set = roomUserIndex.get(key)
if (set) {
set.delete(token)
if (set.size === 0) roomUserIndex.delete(key)
}
return true
}
export function revokeRejoinTickets(roomId: string, userId: string): void {
const key = roomUserKey(roomId, userId)
const set = roomUserIndex.get(key)
if (!set) return
for (const token of set) tickets.delete(token)
roomUserIndex.delete(key)
}
export function cleanupRoomRejoinTickets(roomId: string): void {
for (const [key, set] of roomUserIndex) {
if (!key.startsWith(`${roomId}:`)) continue
for (const token of set) tickets.delete(token)
roomUserIndex.delete(key)
}
}
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