10 files changed, 589 insertions, 0 deletions
diff --git a/client-web/source/helper.ts b/client-web/source/helper.ts
new file mode 100644
index 0000000..31e500a
--- /dev/null
+++ b/client-web/source/helper.ts
@@ -0,0 +1,43 @@
+/// <reference lib="dom" />
+
+import { parameters } from "./index.ts"
+
+export function get_query_params(): { [key: string]: string } {
+    const q: { [key: string]: string } = {}
+    for (const kv of window.location.hash.substring(1).split("&")) {
+        const [key, value] = kv.split("=")
+        q[decodeURIComponent(key)] = decodeURIComponent(value)
+    }
+    return q
+}
+
+export function hex_id(len = 8): string {
+    if (len > 8) return hex_id() + hex_id(len - 8)
+    return Math.floor(Math.random() * 16 ** len).toString(16).padStart(len, "0")
+}
+
+export function parameter_bool(name: string, def: boolean): boolean {
+    const v = parameters[name]
+    if (!v) return def
+    if (v == "0" || v == "false" || v == "no") return false
+    if (v == "1" || v == "true" || v == "yes") return true
+    alert(`parameter ${name} is invalid`)
+    return def
+}
+
+export function parameter_number(name: string, def: number): number {
+    const v = parameters[name]
+    if (!v) return def
+    const n = parseFloat(v)
+    if (Number.isNaN(n)) {
+        alert(`parameter ${name} is invalid`)
+        return def
+    }
+    return n
+}
+
+export function parameter_string(name: string, def: string): string {
+    const v = parameters[name]
+    if (!v) return def
+    return v
+}
diff --git a/client-web/source/index.ts b/client-web/source/index.ts
new file mode 100644
index 0000000..fbb77d4
--- /dev/null
+++ b/client-web/source/index.ts
@@ -0,0 +1,55 @@
+/// <reference lib="dom" />
+
+import { get_query_params } from "./helper.ts"
+import { log } from "./logger.ts"
+import { create_menu } from "./menu.ts";
+import { Room } from "./room.ts"
+
+export const servers: RTCConfiguration = {
+    iceServers: [{ urls: ["stun:stun1.l.google.com:19302", "stun:stun2.l.google.com:19302"] }],
+    iceCandidatePoolSize: 10,
+}
+
+export interface User {
+    peer: RTCPeerConnection
+    stream: MediaStream,
+}
+
+export const parameters = get_query_params()
+
+window.onload = () => main()
+
+export function main() {
+    document.body.querySelector("p")?.remove()
+    log("*", "starting up")
+    if (window.location.pathname.startsWith("/room/")) {
+        const room_name = window.location.pathname.substring("/room/".length)
+        const room = new Room(room_name)
+        create_menu(room)
+        document.body.append(room.el)
+    } else {
+        create_menu()
+        document.body.append(create_start_screen())
+    }
+}
+
+function create_start_screen() {
+    const with_text_content = (a: string) => (b: string) => {
+        const e = document.createElement(a)
+        e.textContent = b
+        return e
+    }
+    const p = with_text_content("p")
+    const h2 = with_text_content("h2")
+
+    const el = document.createElement("div")
+    el.append(
+        h2("keks-meet"),
+        p("A web conferencing application using webrtc"),
+        p("keks-meet is free software! It is licenced under the terms of the third version of the GNU Affero General Public Licence only."),
+        p("To get started, just enter a unique idenfier, click 'Join', then share the URL with your partner.")
+    )
+
+
+    return el
+}
diff --git a/client-web/source/local_user.ts b/client-web/source/local_user.ts
new file mode 100644
index 0000000..ca91a19
--- /dev/null
+++ b/client-web/source/local_user.ts
@@ -0,0 +1,125 @@
+/// <reference lib="dom" />
+
+import { parameter_bool, parameter_number } from "./helper.ts";
+import { log } from "./logger.ts";
+import { RemoteUser } from "./remote_user.ts";
+import { get_rnnoise_node } from "./rnnoise.ts";
+import { Room } from "./room.ts";
+import { TrackHandle } from "./track_handle.ts";
+import { User } from "./user.ts";
+
+
+export class LocalUser extends User {
+    mic_gain?: GainNode
+    default_gain: number = parameter_number("mic_gain", 1)
+
+    constructor(room: Room, name: string) {
+        super(room, name)
+        this.el.classList.add("local")
+        this.local = true
+        this.create_controls()
+        this.add_initial_tracks()
+        log("usermodel", `added local user: ${this.name}`)
+    }
+
+    async add_initial_tracks() {
+        if (parameter_bool("mic_enabled", false)) this.publish_track(await this.create_mic_track())
+        if (parameter_bool("camera_enabled", false)) this.publish_track(await this.create_camera_track())
+        if (parameter_bool("screen_enabled", false)) this.publish_track(await this.create_screen_track())
+    }
+
+    publish_track(t: TrackHandle) {
+        this.room.remote_users.forEach(u => u.peer.addTrack(t.track))
+        this.add_track(t)
+        t.addEventListener("ended", () => {
+            this.room.remote_users.forEach(u => {
+                u.peer.getSenders().forEach(s => {
+                    if (s.track == t.track) u.peer.removeTrack(s)
+                })
+            })
+        })
+    }
+
+    add_initial_to_remote(u: RemoteUser) {
+        this.tracks.forEach(t => u.peer.addTrack(t.track))
+    }
+
+    create_controls() {
+        const mic_toggle = document.createElement("input")
+        const camera_toggle = document.createElement("input")
+        const screen_toggle = document.createElement("input")
+        mic_toggle.type = camera_toggle.type = screen_toggle.type = "button"
+        mic_toggle.value = "Microphone"
+        camera_toggle.value = "Camera"
+        screen_toggle.value = "Screen"
+
+        const create = async (_e: HTMLElement, tp: Promise<TrackHandle>) => {
+            log("media", "awaiting track")
+            const t = await tp
+            log("media", "got track")
+            this.publish_track(t)
+        }
+
+        mic_toggle.addEventListener("click", () => create(mic_toggle, this.create_mic_track()))
+        camera_toggle.addEventListener("click", () => create(camera_toggle, this.create_camera_track()))
+        screen_toggle.addEventListener("click", () => create(screen_toggle, this.create_screen_track()))
+
+        const el = document.createElement("div")
+        el.classList.add("local-controls")
+        el.append(mic_toggle, camera_toggle, screen_toggle)
+        document.body.append(el)
+    }
+
+
+    async create_camera_track() {
+        log("media", "requesting user media (camera)")
+        const user_media = await window.navigator.mediaDevices.getUserMedia({ video: true })
+        return new TrackHandle(user_media.getVideoTracks()[0], true)
+    }
+    async create_screen_track() {
+        log("media", "requesting user media (screen)")
+        const user_media = await window.navigator.mediaDevices.getDisplayMedia({ video: true })
+        return new TrackHandle(user_media.getVideoTracks()[0], true)
+    }
+    async create_mic_track() {
+        log("media", "requesting user media (audio)")
+        const use_rnnoise = parameter_bool("rnnoise", true)
+        const audio_contraints = use_rnnoise ? {
+            channelCount: { ideal: 1 },
+            noiseSuppression: { ideal: false },
+            echoCancellation: { ideal: true },
+            autoGainControl: { ideal: false },
+        } : true;
+
+        const user_media = await window.navigator.mediaDevices.getUserMedia({ audio: audio_contraints })
+        const context = new AudioContext()
+        const source = context.createMediaStreamSource(user_media)
+        const destination = context.createMediaStreamDestination()
+        const gain = context.createGain()
+        gain.gain.value = this.default_gain
+        this.mic_gain = gain
+
+        let rnnoise: RNNoiseNode;
+        if (use_rnnoise) {
+            rnnoise = await get_rnnoise_node(context)
+            source.connect(rnnoise)
+            rnnoise.connect(gain)
+        } else {
+            source.connect(gain)
+        }
+        gain.connect(destination)
+
+        const t = new TrackHandle(destination.stream.getAudioTracks()[0], true)
+
+        t.addEventListener("ended", () => {
+            user_media.getTracks().forEach(t => t.stop())
+            source.disconnect()
+            if (rnnoise) rnnoise.disconnect()
+            gain.disconnect()
+            destination.disconnect()
+            this.mic_gain = undefined
+        })
+
+        return t
+    }
+}
diff --git a/client-web/source/logger.ts b/client-web/source/logger.ts
new file mode 100644
index 0000000..e00b1d0
--- /dev/null
+++ b/client-web/source/logger.ts
@@ -0,0 +1,50 @@
+/// <reference lib="dom" />
+
+const log_tag_color = {
+    "*": "#FF4444",
+    webrtc: "#FF44FF",
+    media: "#FFFF44",
+    ws: "#44FFFF",
+    rnnoise: "#2222FF",
+    usermodel: "#44FF44",
+    error: "#FF0000",
+}
+export type LogTag = keyof typeof log_tag_color
+
+let logger_container: HTMLDivElement
+
+// TODO maybe log time aswell
+// deno-lint-ignore no-explicit-any
+export function log(tag: LogTag, message: string, ...data: any[]) {
+    for (let i = 0; i < data.length; i++) {
+        const e = data[i];
+        if (e instanceof MediaStreamTrack) data[i] = `(${e.kind}) ${e.id}`
+    }
+    console.log(`%c[${tag}] ${message}`, "color:" + log_tag_color[tag], ...data);
+
+    if (logger_container) {
+        const e = document.createElement("p")
+        e.classList.add("logger-line")
+        e.textContent = `[${tag}] ${message}`
+        e.style.color = log_tag_color[tag]
+        logger_container.append(e)
+        setTimeout(() => {
+            e.remove()
+        }, tag == "error" ? 60000 : 6000)
+    }
+}
+
+globalThis.addEventListener("load", () => {
+    const d = document.createElement("div")
+    d.classList.add("logger-container")
+    document.body.append(d)
+    logger_container = d
+
+    // clear the console every hour so logs dont accumulate
+    setInterval(() => console.clear(), 1000 * 60 * 60)
+})
+
+globalThis.onerror = (_ev, source, line, col, err) => {
+    log("error", `${err?.name} ${err?.message}`, err)
+    log("error", `on ${source}:${line}:${col}`, err)
+}
+\ No newline at end of file
diff --git a/client-web/source/menu.ts b/client-web/source/menu.ts
new file mode 100644
index 0000000..1401b42
--- /dev/null
+++ b/client-web/source/menu.ts
@@ -0,0 +1,26 @@
+import { Room } from "./room.ts";
+
+export function create_menu(room?: Room) {
+    const menu = document.createElement("div")
+    menu.classList.add("menu-overlay")
+    document.body.append(menu)
+
+    const item = (name: string, cb: (() => void) | string) => {
+        const p = document.createElement("p")
+        const a = document.createElement("a")
+        a.classList.add("menu-item")
+        a.textContent = name
+        if (typeof cb == "string") a.href = cb
+        else a.addEventListener("click", cb), a.href = "#"
+        p.append(a)
+        return p
+    }
+
+    if (room) menu.append(
+        item("Settings", () => alert("todo, refer to the url parameters in the docs for now"))
+    )
+    menu.append(
+        item("Licence", "/licence"),
+        item("Sources / Documentation", "https://codeberg.org/metamuffin/keks-meet"),
+    )
+}
+\ No newline at end of file
diff --git a/client-web/source/remote_user.ts b/client-web/source/remote_user.ts
new file mode 100644
index 0000000..a0fdeaf
--- /dev/null
+++ b/client-web/source/remote_user.ts
@@ -0,0 +1,74 @@
+/// <reference lib="dom" />
+
+import { servers } from "./index.ts"
+import { log } from "./logger.ts"
+import { Room } from "./room.ts"
+import { TrackHandle } from "./track_handle.ts";
+import { User } from "./user.ts"
+
+export class RemoteUser extends User {
+    peer: RTCPeerConnection
+    negotiation_busy = false
+
+    constructor(room: Room, name: string) {
+        super(room, name)
+        log("usermodel", `added remote user: ${name}`)
+        this.peer = new RTCPeerConnection(servers)
+        this.peer.onicecandidate = ev => {
+            if (!ev.candidate) return
+            room.websocket_send({ ice_candiate: ev.candidate.toJSON(), receiver: this.name })
+        }
+        this.peer.ontrack = ev => {
+            const t = ev.track
+            log("media", `remote track: ${this.name}`, t)
+            this.add_track(new TrackHandle(t))
+        }
+        this.peer.onnegotiationneeded = async () => {
+            log("webrtc", `negotiation needed: ${this.name}`)
+            while (this.negotiation_busy) {
+                await new Promise<void>(r => setTimeout(() => r(), 100))
+            }
+            this.offer()
+        }
+    }
+
+    async offer() {
+        this.negotiation_busy = true
+        const offer_description = await this.peer.createOffer()
+        await this.peer.setLocalDescription(offer_description)
+        const offer = { type: offer_description.type, sdp: offer_description.sdp }
+        log("webrtc", `sent offer: ${this.name}`, { a: offer })
+        this.room.websocket_send({ receiver: this.name, offer })
+    }
+    async on_offer(offer: RTCSessionDescriptionInit) {
+        this.negotiation_busy = true
+        log("webrtc", `got offer: ${this.name}`, { a: offer })
+        const offer_description = new RTCSessionDescription(offer)
+        await this.peer.setRemoteDescription(offer_description)
+        this.answer()
+    }
+    async answer() {
+        const answer_description = await this.peer.createAnswer()
+        await this.peer.setLocalDescription(answer_description)
+        const answer = { type: answer_description.type, sdp: answer_description.sdp }
+        log("webrtc", `sent answer: ${this.name}`, { a: answer })
+        this.room.websocket_send({ receiver: this.name, answer })
+        this.negotiation_busy = false
+    }
+    async on_answer(answer: RTCSessionDescriptionInit) {
+        log("webrtc", `got answer: ${this.name}`, { a: answer })
+        const answer_description = new RTCSessionDescription(answer)
+        await this.peer.setRemoteDescription(answer_description)
+        this.negotiation_busy = false
+    }
+
+    add_ice_candidate(candidate: RTCIceCandidateInit) {
+        this.peer.addIceCandidate(new RTCIceCandidate(candidate))
+    }
+
+    leave() {
+        log("usermodel", `remove remote user: ${this.name}`)
+        this.peer.close()
+        this.room.el.removeChild(this.el)
+    }
+}
+\ No newline at end of file
diff --git a/client-web/source/rnnoise.ts b/client-web/source/rnnoise.ts
new file mode 100644
index 0000000..7867682
--- /dev/null
+++ b/client-web/source/rnnoise.ts
@@ -0,0 +1,38 @@
+/// <reference lib="dom" />
+
+import { log } from "./logger.ts"
+
+declare global {
+    class RNNoiseNode extends AudioWorkletNode {
+        static register(context: AudioContext): Promise<void>
+        constructor(context: AudioContext)
+        // deno-lint-ignore no-explicit-any
+        onstatus: (data: any) => void
+        update(something: boolean): void
+    }
+}
+
+
+// TODO fix leak
+export async function get_rnnoise_node(context: AudioContext): Promise<RNNoiseNode> {
+    log("rnnoise", "enabled")
+    //@ts-ignore asfdasfd
+    let RNNoiseNode: typeof RNNoiseNode = window.RNNoiseNode;
+
+    let script: HTMLScriptElement;
+    if (!RNNoiseNode) {
+        log("rnnoise", "loading wasm...")
+        script = document.createElement("script")
+        script.src = "/_rnnoise/rnnoise-runtime.js"
+        script.defer = true
+        document.head.appendChild(script)
+        //@ts-ignore asdfsfad
+        while (!window.RNNoiseNode) await new Promise<void>(r => setTimeout(() => r(), 100))
+        //@ts-ignore asfdsadfsafd
+        RNNoiseNode = window.RNNoiseNode;
+        log("rnnoise", "loaded")
+    }
+
+    await RNNoiseNode.register(context)
+    return new RNNoiseNode(context)
+}
+\ No newline at end of file
diff --git a/client-web/source/room.ts b/client-web/source/room.ts
new file mode 100644
index 0000000..f22cff1
--- /dev/null
+++ b/client-web/source/room.ts
@@ -0,0 +1,72 @@
+/// <reference lib="dom" />
+
+import { log } from "./logger.ts";
+import { RemoteUser } from "./remote_user.ts";
+import { User } from "./user.ts";
+import { LocalUser } from "./local_user.ts";
+import { hex_id, parameter_string } from "./helper.ts";
+import { PacketS, PacketC } from "../../common/packets.d.ts";
+
+
+export class Room {
+    el: HTMLElement
+    name: string
+    users: Map<string, User> = new Map()
+    remote_users: Map<string, RemoteUser> = new Map()
+    local_user: LocalUser
+    websocket: WebSocket
+
+    constructor(name: string) {
+        this.name = name
+        this.el = document.createElement("div")
+        this.el.classList.add("room")
+        this.websocket = new WebSocket(`${window.location.protocol.endsWith("s:") ? "wss" : "ws"}://${window.location.host}/signaling/${encodeURIComponent(name)}`)
+        this.websocket.onclose = () => this.websocket_close()
+        this.websocket.onopen = () => this.websocket_open()
+        this.websocket.onmessage = (ev) => {
+            this.websocket_message(JSON.parse(ev.data))
+        }
+        this.local_user = new LocalUser(this, parameter_string("username", `guest-${hex_id()}`))
+    }
+
+    websocket_send(data: PacketS) {
+        log("ws", `-> ${data.receiver ?? "*"}`, data)
+        this.websocket.send(JSON.stringify(data))
+    }
+    websocket_message(packet: PacketC) {
+        if (packet.join) {
+            log("*", `${this.name} ${packet.sender} joined`);
+            const ru = new RemoteUser(this, packet.sender)
+            this.local_user.add_initial_to_remote(ru)
+            if (!packet.stable) ru.offer()
+            this.users.set(packet.sender, ru)
+            this.remote_users.set(packet.sender, ru)
+            return
+        }
+        const sender = this.remote_users.get(packet.sender)
+        if (!sender) return console.warn(`unknown sender ${packet.sender}`)
+        if (packet.leave) {
+            log("*", `${this.name} ${packet.sender} left`);
+            sender.leave()
+            this.users.delete(packet.sender)
+            this.remote_users.delete(packet.sender)
+            return
+        }
+        if (!packet.data) return console.warn("dataless packet")
+        log("ws", `<- ${packet.sender}: `, packet.data);
+        if (packet.data.ice_candiate) sender.add_ice_candidate(packet.data.ice_candiate)
+        if (packet.data.offer) sender.on_offer(packet.data.offer)
+        if (packet.data.answer) sender.on_answer(packet.data.answer)
+    }
+    websocket_close() {
+        log("ws", "websocket closed");
+        setTimeout(() => {
+            window.location.reload()
+        }, 1000)
+    }
+    websocket_open() {
+        log("ws", "websocket opened");
+        this.websocket.send(this.local_user.name)
+        setInterval(() => this.websocket_send({}), 30000) // stupid workaround for nginx disconnection inactive connections
+    }
+}
+\ No newline at end of file
diff --git a/client-web/source/track_handle.ts b/client-web/source/track_handle.ts
new file mode 100644
index 0000000..98b2b2f
--- /dev/null
+++ b/client-web/source/track_handle.ts
@@ -0,0 +1,26 @@
+/// <reference lib="dom" />
+
+export class TrackHandle extends EventTarget {
+    constructor(
+        public track: MediaStreamTrack,
+        public local = false
+    ) {
+        super()
+        track.onended = () => this.dispatchEvent(new CustomEvent("ended"))
+        // TODO research how onmute and onunmute behave
+        track.onmute = () => this.dispatchEvent(new CustomEvent("ended")) // onmute seems to be called when the remote ends the track
+        track.onunmute = () => this.dispatchEvent(new CustomEvent("started"))
+
+        this.addEventListener("ended", () => {
+            // drop all references to help gc
+            track.onunmute = track.onmute = track.onended = null
+        })
+    }
+
+    get kind() { return this.track.kind }
+    get label() { return this.track.label }
+    get muted() { return this.track.muted }
+    get id() { return this.track.id }
+
+    end() { this.track.stop(); this.dispatchEvent(new CustomEvent("ended")) }
+}
diff --git a/client-web/source/user.ts b/client-web/source/user.ts
new file mode 100644
index 0000000..bda875f
--- /dev/null
+++ b/client-web/source/user.ts
@@ -0,0 +1,80 @@
+/// <reference lib="dom" />
+
+import { log } from "./logger.ts"
+import { Room } from "./room.ts"
+import { TrackHandle } from "./track_handle.ts";
+
+
+export abstract class User {
+    name: string
+    room: Room
+
+    el: HTMLElement
+
+    local = false
+
+    protected tracks: Set<TrackHandle> = new Set()
+
+    constructor(room: Room, name: string) {
+        this.name = name
+        this.room = room
+        this.el = document.createElement("div")
+        this.el.classList.add("user")
+        this.room.el.append(this.el)
+        this.setup_view()
+    }
+
+    add_track(t: TrackHandle) {
+        this.tracks.add(t)
+        this.create_track_element(t)
+        t.addEventListener("ended", () => {
+            log("media", "track ended", t)
+            this.tracks.delete(t)
+        })
+        t.addEventListener("mute", () => {
+            log("media", "track muted", t)
+        })
+        t.addEventListener("unmute", () => {
+            log("media", "track unmuted", t)
+        })
+    }
+
+    setup_view() {
+        const info_el = document.createElement("div")
+        info_el.classList.add("info")
+        const name_el = document.createElement("span")
+        name_el.textContent = this.name
+        name_el.classList.add("name")
+        info_el.append(name_el)
+        this.el.append(info_el)
+    }
+
+    create_track_element(t: TrackHandle) {
+        const is_video = t.kind == "video"
+        const media_el = is_video ? document.createElement("video") : document.createElement("audio")
+        const stream = new MediaStream([t.track])
+        media_el.srcObject = stream
+        media_el.classList.add("media")
+        media_el.autoplay = true
+        media_el.controls = true
+
+        if (this.local) media_el.muted = true
+
+
+        const el = document.createElement("div")
+        if (t.local) {
+            const end_button = document.createElement("button")
+            end_button.textContent = "End"
+            end_button.addEventListener("click", () => {
+                t.end()
+            })
+            el.append(end_button)
+        }
+        el.append(media_el)
+        this.el.append(el)
+        t.addEventListener("ended", () => {
+            media_el.srcObject = null
+            el.remove()
+        })
+    }
+}
+\ No newline at end of file