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import { Router } from "https://deno.land/x/oak@v10.4.0/router.ts";
import { PacketC, PacketS } from "../packets.ts";
export const api = new Router()
type Room = Map<string, WebSocket>
const rooms: Map<string, Room> = new Map()
function send_packet(ws: WebSocket, packet: PacketC) {
ws.send(JSON.stringify(packet))
}
api.get("/signaling/:id", c => {
const ws = c.upgrade()
const room_name = c.params.id
const room: Room = rooms.get(c.params.id) ?? new Map()
let initialized = false
let user_name = ""
const init = (n: string) => {
if (room.get(n)) return ws.close()
initialized = true
user_name = n
rooms.set(c.params.id, room)
room.forEach(uws => send_packet(uws, { sender: user_name, join: true }))
room.forEach((_, uname) => send_packet(ws, { sender: uname, join: true, stable: true }))
room.set(user_name, ws)
console.log(`[${room_name}] ${user_name} joined`)
}
ws.onclose = () => {
room.delete(user_name)
room.forEach(uws => send_packet(uws, { sender: user_name, leave: true }))
if (room.size == 0) rooms.delete(room_name)
console.log(`[${room_name}] ${user_name} left`)
}
ws.onmessage = ev => {
const message = ev.data.toString()
if (!initialized) return init(message)
let in_packet: PacketS;
try { in_packet = JSON.parse(message) }
catch (_e) { return }
if (JSON.stringify(in_packet) == "{}") return // drop ping
console.log(`[${room_name}] ${user_name} -> ${in_packet.receiver ?? "*"}: ${message.substr(0, 100)}`)
const out_packet: PacketC = { sender: user_name, data: in_packet }
if (in_packet.receiver) {
const rws = room.get(in_packet.receiver)
if (rws) send_packet(rws, out_packet)
} else {
room.forEach((uws, uname) => {
if (uname != user_name) send_packet(uws, out_packet)
})
}
}
})
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