update to newer version

README.md

@@ -1,13 +1,20 @@
-CENTVRION
+CENTURION
 =========
 
 ## Introduction
-The projects consists of two projects, a frontend written in React, and a backend written in javascript. Both communicate with a websocket.
+The projects consists of two projects, a frontend written in React, and a backend written in Typescript (Node). Both communicate with a websocket.
 
 ## Setup
-Download centurion.m4a and place it in frontend/public/centurion.m4a
+1. Download the various song files and place them in `frontend/public/songs/`. Easiest way to do this is to get them from production (E.g. `https://centurion.svia.nl/songs/centurion.m4a`)
+2. Run `npm i` in the root directory, frontend, and backend.
+3. Prepare the pre-commit hooks by running `npm run prepare`.
 
-Start the backend with `npm run app` and the frontend with `npm run start`.
+ESLint is used for linting, Prettier for formatting. Currently, there are no tests. Tread carefully.
+
+## Starting
+
+* Start the frontend by running `npm run start` in the frontend directory.
+* Idem for the backend.
 
 
 

backend/.eslintrc.js

@@ -0,0 +1,7 @@
+module.exports = {
+  "ignorePatterns": [".eslintrc.js"],
+  "parserOptions": {
+    "tsconfigRootDir": __dirname,
+    "project": ["./tsconfig.json"]
+  }
+};

backend/Dockerfile

@@ -1,11 +1,13 @@
-FROM node:13-alpine
+FROM node:16-alpine
 WORKDIR /app
 
-COPY package.json yarn.lock ./
-RUN yarn install
+# Install TS manually since it's only included in the parent's package.json
+RUN npm install --global typescript@^4.5.2
+COPY package.json package-lock.json ./
+RUN npm ci --no-progress --no-optional
 
 COPY tsconfig.json ./
-
 COPY src src/
-COPY data data/
-CMD ["npm", "run", "app"]
+RUN npm run build
+
+CMD ["npm", "run", "start-compiled"]

backend/package.json

@@ -5,18 +5,21 @@
   "main": "./src/index.js",
   "scripts": {
     "build": "tsc",
-    "app": "ts-node src/index.ts"
+    "start-compiled": "node build/index.js",
+    "start": "ts-node src/index.ts",
+    "check": "tsc --noEmit",
+    "lint": "eslint 'src/**/*.{ts,tsx}'",
+    "fix": "eslint --fix 'src/**/*.{ts,tsx}'"
   },
   "author": "",
   "license": "ISC",
   "dependencies": {
     "express": "^4.17.1",
-    "socket.io": "^2.3.0"
+    "socket.io": "^4.4.0"
   },
   "devDependencies": {
-    "@types/express": "^4.17.6",
-    "@types/socket.io": "^2.1.4",
-    "ts-node": "^8.8.2",
-    "typescript": "^3.8.3"
+    "@types/express": "^4.17.13",
+    "@types/node": "^16.11.12",
+    "ts-node": "^10.4.0"
   }
 }

backend/src/Room.ts

@@ -1,77 +1,96 @@
-import {Socket} from "socket.io";
-
 import User from "./User";
-import {getIndex, getNextShot, getTimeline, getTimelineNames, indexForTime} from "./timeline";
-import {getCurrentTime} from "./util";
+import { getTimeline, getTimelineNames } from "./timeline";
+import { getCurrentTime } from "./util";
 
 export interface RoomOptions {
-    seekTime: number
-    timelineName: string
+  seekTime: number;
+  timelineName: string;
+}
+
+export interface TickerMessage {
+  user: User;
+  message: string;
+}
+
+// FIXME: dedupe with frontend
+export interface SerializedRoom {
+  id: number;
+  userCount: number;
+  isLeader: boolean;
+  running: boolean;
+  startTime?: number;
+  seekTime: number;
+  timelineName: string;
+  readyToParticipate: boolean;
+  speedFactor: number;
+  ticker: string[];
+  users?: { id: string; readyToParticipate: boolean }[];
 }
 
 export default class Room {
-    id: number = 0;
+  id = 0;
   users: User[] = [];
   leader: User | null = null;
 
+  ticker: TickerMessage[] = [];
+
   running = false;
-    startTime = 0;
-    currentSeconds = 0;
-    timelineIndex: number = 0;
+  startTime: number | undefined = undefined;
 
-    seekTime: number = 0;
-    timelineName: string = 'Centurion';
+  seekTime = 0;
+  timelineName = "Centurion";
 
   // For debugging purposes
   speedFactor = 1;
-    autoStart = false;
 
   constructor(name: number) {
     this.id = name;
   }
 
-    serialize(user: User) {
-        return {
-            'id': this.id,
-            'userCount': this.users.length,
-            'isLeader': this.leader == user,
-            'running': this.running,
-            'startTime': this.startTime,
-            'timelineName': this.timelineName,
-            'seekTime': this.seekTime,
-            'readyToParticipate': user.readyToParticipate || this.leader == user,
-            'speedFactor': this.speedFactor
+  serialize(user?: User) {
+    const obj: SerializedRoom = {
+      id: this.id,
+      userCount: this.users.length,
+      isLeader: this.leader === user,
+      running: this.running,
+      startTime: this.startTime,
+      timelineName: this.timelineName,
+      seekTime: this.seekTime,
+      readyToParticipate: this.getLeader()?.readyToParticipate || false,
+      speedFactor: this.speedFactor,
+      ticker: this.ticker.map((i) => i.message),
+    };
+
+    if (typeof user === "undefined" || this.leader === user) {
+      obj["users"] = this.users.map((u) => u.serialize());
     }
+
+    return obj;
   }
 
-    serializeTimeline(user: User) {
+  serializeTimeline() {
     return getTimeline(this.timelineName);
   }
 
   sync() {
-        this.users.forEach(u => u.sync());
+    this.users.forEach((u) => u.sync());
   }
 
-    join(user: User) {
+  async join(user: User) {
     this.users.push(user);
-        user.setRoom(this);
+    await user.setRoom(this);
 
     if (!this.hasLeader()) {
       this.setLeader(user);
     }
 
-        if (this.autoStart) {
-            this.seekTime = 2500000;
-            this.running = true;
-            this.start();
-        }
-
     this.sync();
   }
 
-    leave(user: User) {
+  async leave(user: User) {
+    this.removeTickerMessageForUser(user);
     this.users.splice(this.users.indexOf(user), 1);
-        user.setRoom(null);
+    await user.setRoom(null);
 
     if (this.leader == user) {
       this.setRandomLeader();
@@ -80,91 +99,20 @@ export default class Room {
     this.sync();
   }
 
-    onBeforeDelete() {
-    }
-
-    setOptions(options: any) {
-        this.seekTime = Math.max(0, Math.min(options.seekTime, 250 * 60 * 1000))
+  setOptions(options: { seekTime: number; timelineName: string }) {
+    this.seekTime = Math.max(0, Math.min(options.seekTime, 250 * 60 * 1000));
     if (getTimelineNames().indexOf(options.timelineName) >= 0) {
       this.timelineName = options.timelineName;
     }
-        this.sync()
+    this.sync();
   }
 
   start() {
     this.running = true;
-        this.startTime = getCurrentTime() - this.seekTime
-
+    this.startTime = getCurrentTime() - this.seekTime;
     this.sync();
   }
 
-    run(io: Socket) {
-        this.running = true;
-        this.startTime = Date.now();
-
-        // io.to(this.id.toString()).emit('timeline', {
-        //     'timeline': {
-        //     }
-        // });
-
-        const doTick = () => {
-            if (this.users.length === 0) {
-                // this room is over.
-                return;
-            }
-
-            const timestamp = getIndex(this.timelineIndex);
-            const nextShot = getNextShot(this.timelineIndex);
-
-            if (!timestamp) {
-                // We are done.
-                io.to(this.id.toString()).emit('tick_event', {
-                    tick: {
-                        current: this.currentSeconds
-                    }
-                });
-                console.log("Done");
-                this.running = false;
-                return;
-            }
-
-            console.log("ticking", this.currentSeconds);
-
-            io.to(this.id.toString()).emit('tick_event', {
-                tick: {
-                    current: this.currentSeconds,
-                    next: timestamp,
-                    nextShot: nextShot
-                }
-            });
-
-            if (this.currentSeconds >= timestamp.timestamp) {
-                this.timelineIndex += 1;
-            }
-
-            this.currentSeconds += 1;
-            // We spend some time processing, wait a bit less than 1000ms
-            const nextTickTime = this.startTime + (1000 * this.currentSeconds / this.speedFactor);
-            const waitTime = nextTickTime - Date.now();
-            console.log("waiting", waitTime);
-            setTimeout(doTick, Math.floor(waitTime / this.speedFactor));
-        };
-
-        doTick();
-    }
-
-    /**
-     *
-     * @param io
-     * @param {number} time
-     */
-    seek(io: Socket, time: number) {
-        this.currentSeconds = time;
-        this.startTime = Date.now() - time * 1000;
-        this.timelineIndex = indexForTime(this.currentSeconds);
-        io.to(this.id.toString()).emit('seek', time);
-    }
-
   /**
    *
    * @returns {boolean}
@@ -179,23 +127,6 @@ export default class Room {
     }
   }
 
-    /**
-     *
-     * @param id
-     * @returns {User|undefined}
-     */
-    getUser(id: string) {
-        return this.users.find(u => u.id === id);
-    }
-
-    /**
-     *
-     * @param {string} id
-     */
-    removeUser(id: string) {
-        this.users = this.users.filter(u => u.id !== id);
-    }
-
   hasLeader(): boolean {
     return this.leader != null;
   }
@@ -207,4 +138,30 @@ export default class Room {
   getLeader(): User | null {
     return this.leader;
   }
-};
+
+  submitTickerMessage(user: User, message: string) {
+    message = message.replace("\n", "");
+
+    this.removeTickerMessageForUser(user);
+
+    this.ticker.push({
+      user: user,
+      message: message,
+    });
+
+    this.sync();
+  }
+
+  removeTickerMessageForUser(user: User) {
+    let existing = -1;
+    for (let i = 0; i < this.ticker.length; i++) {
+      if (this.ticker[i].user === user) {
+        existing = i;
+        break;
+      }
+    }
+    if (existing >= 0) {
+      this.ticker.splice(existing, 1);
+    }
+  }
+}

backend/src/Service.ts

@@ -1,64 +1,72 @@
-import {Socket} from "socket.io";
+import { Socket } from "socket.io";
 
-import User from './User'
-import Room, {RoomOptions} from './Room'
-import {getCurrentTime, randomInt} from "./util";
+import User from "./User";
+import Room, { RoomOptions } from "./Room";
+import { getCurrentTime } from "./util";
 
 export default class Service {
   private roomIdToRooms = new Map<number, Room>();
   private socketsToUsers = new Map<string, User>();
 
+  get rooms(): Room[] {
+    const rooms = [];
+    for (const [, room] of this.roomIdToRooms) {
+      rooms.push(room);
+    }
+
+    return rooms;
+  }
+
   onSocketConnect(socket: Socket) {
-        let user = new User(socket);
+    const user = new User(socket);
     this.socketsToUsers.set(socket.id, user);
     user.sync();
   }
 
-    onSocketDisconnect(socket: Socket) {
-        let user = this.getUser(socket);
+  async onSocketDisconnect(socket: Socket) {
+    const user = this.getUser(socket);
 
     if (user.room != null) {
-            user.room.leave(user);
+      await user.room.leave(user);
     }
 
     this.deleteEmptyRooms();
-
-        user.onDisconnect();
   }
 
   onTimeSync(socket: Socket, requestId: number, clientTime: number) {
-        let user = this.getUser(socket);
+    const user = this.getUser(socket);
 
-        let now = getCurrentTime();
-        user.emit('time_sync', {
-            'requestId': requestId,
-            'clientDiff': now - clientTime,
-            'serverTime': now
-        })
+    const now = getCurrentTime();
+    user.emit("time_sync", {
+      requestId: requestId,
+      clientDiff: now - clientTime,
+      serverTime: now,
+    });
   }
 
   onSetRoomOptions(socket: Socket, options: RoomOptions) {
-        let user = this.getUser(socket);
+    const user = this.getUser(socket);
 
     if (user.room?.getLeader() == user) {
-            user.room!!.setOptions(options)
+      user.room.setOptions(options);
     }
   }
 
   onRequestStart(socket: Socket) {
-        let user = this.getUser(socket);
+    const user = this.getUser(socket);
 
-        if (user.room?.getLeader() == user) {
-            user.room!!.start();
+    if (user.room?.getLeader() === user) {
+      user.room.start();
+      user.room.sync();
     }
   }
 
-    onRequestJoin(socket: Socket, roomId: number): boolean {
-        let user = this.getUser(socket);
+  async onRequestJoin(socket: Socket, roomId: number) {
+    const user = this.getUser(socket);
     if (user.room && user.room.id == roomId) return false;
 
     if (user.room) {
-            user.room.leave(user);
+      await user.room.leave(user);
       this.deleteEmptyRooms();
     }
 
@@ -66,46 +74,60 @@ export default class Service {
       this.createRoomWithId(roomId);
     }
 
-        let room = this.roomIdToRooms.get(roomId)!!;
-        room.join(user);
+    const room = this.roomIdToRooms.get(roomId);
+    if (!room) {
+      return false;
+    }
+
+    await room.join(user);
 
     return true;
   }
 
-    onRequestReady(socket: Socket) {
-        let user = this.getUser(socket);
+  onRequestSetReady(socket: Socket) {
+    const user = this.getUser(socket);
     if (!user.room || user.readyToParticipate) return;
     user.readyToParticipate = true;
-        user.sync();
+    user.room.sync();
   }
 
-    onRequestJoinRandom(socket: Socket) {
-        let user = this.getUser(socket);
+  async onRequestJoinRandom(socket: Socket) {
+    const user = this.getUser(socket);
 
     if (user.room) {
-            user.room.leave(user);
+      await user.room.leave(user);
       this.deleteEmptyRooms();
     }
 
     const room = this.createRandomRoom();
-        if (!room) throw Error('Too many rooms active');
-        room.join(user);
+    if (!room) throw Error("Too many rooms active");
+    await room.join(user);
   }
 
   hasRoomId(roomId: number): boolean {
     return this.roomIdToRooms.has(roomId);
   }
 
+  submitTickerMessage(socket: Socket, message: string) {
+    const user = this.getUser(socket);
+
+    if (!user.room) {
+      throw new Error("User has no room");
+    }
+
+    user.room.submitTickerMessage(user, message);
+  }
+
   private getUser(socket: Socket): User {
-        let user = this.socketsToUsers.get(socket.id);
+    const user = this.socketsToUsers.get(socket.id);
     if (!user) {
-            throw new Error('User not found');
+      throw new Error("User not found");
     }
     return user;
   }
 
   private deleteEmptyRooms() {
-        for (let room of this.roomIdToRooms.values()) {
+    for (const room of this.roomIdToRooms.values()) {
       if (room.users.length == 0) {
         this.deleteRoom(room);
       }
@@ -114,27 +136,28 @@ export default class Service {
 
   private createRandomRoom(): Room | null {
     let tries = 0;
+    let i = 1;
     while (tries++ < 1000) {
-            const randomId = randomInt(100, Math.max(1000, this.roomIdToRooms.size * 2));
-            if (this.roomIdToRooms.has(randomId)) continue;
-
-            return this.createRoomWithId(randomId);
+      if (this.roomIdToRooms.has(i)) {
+        i++;
+      } else {
+        return this.createRoomWithId(i);
+      }
     }
     return null;
   }
 
   private createRoomWithId(roomId: number): Room {
     if (this.roomIdToRooms.has(roomId)) {
-            throw new Error('A room with the given id already exists');
+      throw new Error("A room with the given id already exists");
     }
 
-        let room = new Room(roomId);
+    const room = new Room(roomId);
     this.roomIdToRooms.set(roomId, room);
     return room;
   }
 
   private deleteRoom(room: Room) {
-        this.roomIdToRooms.get(room.id)!!.onBeforeDelete();
-        this.roomIdToRooms.delete(room.id)
+    this.roomIdToRooms.delete(room.id);
   }
 }

backend/src/User.ts

@@ -1,38 +1,43 @@
-import {Socket} from "socket.io";
+import { Socket } from "socket.io";
 
-import Room from "./Room";
-import {getTimelineNames} from "./timeline";
+import Room, { SerializedRoom } from "./Room";
+import { getTimelineNames } from "./timeline";
+
+export interface Config {
+  availableTimelines: string[];
+}
 
 export default class User {
   socket: Socket;
   id: string;
 
   room: Room | null = null;
-    readyToParticipate: boolean = false;
+  readyToParticipate = false;
 
   constructor(socket: Socket) {
     this.socket = socket;
     this.id = socket.id;
   }
 
-    onDisconnect() {
-        if (this.room != null) {
-
-        }
+  serialize() {
+    return {
+      id: this.id,
+      readyToParticipate: this.readyToParticipate,
+    };
   }
 
-    setRoom(room: Room | null) {
+  async setRoom(room: Room | null) {
     if (this.room === room) return;
 
-        if (this.room != null) {
-            this.socket.leave(this.room.id.toString());
+    if (this.room !== null) {
+      await this.socket.leave(this.room.id.toString());
       this.readyToParticipate = false;
     }
 
     this.room = room;
 
-        if (this.room != null) {
-            this.socket.join(this.room.id.toString());
+    if (this.room !== null) {
+      await this.socket.join(this.room.id.toString());
     }
 
     this.sync();
@@ -40,69 +45,87 @@ export default class User {
 
   getConfig() {
     return {
-            'availableTimelines': getTimelineNames()
-        }
+      availableTimelines: getTimelineNames(),
+    };
   }
 
-    sentConfig: any = null;
-    sentRoom: any = null;
+  sentConfig: Config | null = null;
+  sentRoom: SerializedRoom | null = null;
   sentTimelineName: string | null = null;
 
   sync() {
     // Config
-        let config = this.getConfig();
+    const config = this.getConfig();
     if (!this.syncEquals(this.sentConfig, config)) {
-            this.sentConfig = config;
-            this.emit('config', {
-                'config': this.sentConfig
+      this.sentConfig = Object.assign({}, config);
+      this.emit("config", {
+        config: this.sentConfig,
       });
     }
 
     // Room
     if (!this.syncEquals(this.sentRoom, this.room?.serialize(this))) {
-            this.sentRoom = this.room?.serialize(this);
-            this.emit('room', {
-                'room': this.sentRoom
-            })
+      this.sentRoom = this.room
+        ? (JSON.parse(
+            JSON.stringify(this.room.serialize(this))
+          ) as SerializedRoom)
+        : null;
+
+      this.emit("room", {
+        room: this.sentRoom,
+      });
     }
 
     // Timeline
     if (!this.syncEquals(this.sentTimelineName, this.room?.timelineName)) {
       this.sentTimelineName = this.room?.timelineName || null;
-            this.emit('timeline', {
-                'timeline': this.sentTimelineName == null ? null : this.room!!.serializeTimeline(this)
-            })
+      this.emit("timeline", {
+        timeline:
+          this.sentTimelineName == null ? null : this.room?.serializeTimeline(),
+      });
     }
   }
 
-    emit(eventName: string, obj: any) {
+  emit(eventName: string, obj: unknown) {
     this.socket.emit(eventName, obj);
   }
 
-    syncEquals(obj1: any, obj2: any): boolean {
-        if (obj1 === undefined && obj2 === undefined)
-            return true;
-
-        if ((obj1 === undefined && obj2 !== undefined) || (obj1 !== undefined && obj2 === undefined))
+  syncEquals(obj1: unknown, obj2: unknown): boolean {
+    if (typeof obj1 !== typeof obj2) {
       return false;
+    }
 
-        if (obj1 === null && obj2 === null)
+    if (typeof obj1 !== "object") {
+      // Both are not 'object'
+      return Object.is(obj1, obj2);
+    }
+
+    if (obj1 === null && obj2 === null) {
       return true;
+    }
 
-        if ((obj1 === null && obj2 !== null) || (obj1 !== null && obj2 === null))
+    if (obj1 === null || obj2 === null) {
       return false;
+    }
 
-        if (typeof (obj1) !== typeof (obj2))
-            return false;
+    if (typeof obj2 !== "object") {
+      // This can not happen ;)
+      throw new TypeError("Obj2 is not object while obj1 is.");
+    }
 
-        if (typeof (obj1) === 'string' || typeof (obj1) === 'number' || typeof (obj1) === 'boolean') {
-            return obj1 === obj2;
+    if (Object.keys(obj1).length !== Object.keys(obj2).length) {
+      return false;
     }
 
-        if (Object.keys(obj1).length !== Object.keys(obj2).length) return false
+    return Object.keys(obj1).every((key: string) => {
+      if (!(key in obj1) || !(key in obj2)) {
+        return false;
+      }
 
-        return Object.keys(obj1).every(key =>
-            obj2.hasOwnProperty(key) && this.syncEquals(obj1[key], obj2[key])
+      return this.syncEquals(
+        obj1[key as keyof object],
+        obj2[key as keyof object]
       );
+    });
   }
 }

backend/src/index.ts

@@ -1,84 +1,115 @@
 import express from "express";
-import SocketIO, {Socket} from "socket.io";
+import { Server } from "socket.io";
 import path from "path";
 
-import Service from './Service'
+import Service from "./Service";
+import { RoomOptions } from "./Room";
 
 // process.on('SIGINT', () => process.exit());
 // process.on('SIGTERM', () => process.exit());
 
-const HOST = '0.0.0.0';
+const HOST = "0.0.0.0";
 const PORT = 3001;
 
 const app = express();
-const server = app.listen(PORT, HOST, () => console.log(`Centurion listening on port ${PORT}!`));
-app.use(express.static(path.join(__dirname, '../public')));
+const httpServer = app.listen(PORT, HOST, () =>
+  console.log(`Centurion listening on port ${PORT}!`)
+);
+app.use(express.static(path.join(__dirname, "../public")));
 
-const io = SocketIO(server);
+const io = new Server(httpServer);
 
 const service = new Service();
 
-io.on('connection', socket => {
-    socket.on('disconnect', (reason) => {
-        service.onSocketDisconnect(socket);
+app.get("/state", (req, res) => {
+  return res.json(service.rooms.map((r) => r.serialize()));
+});
+
+io.on("connection", (socket) => {
+  socket.on("disconnect", async () => {
+    await service.onSocketDisconnect(socket);
   });
 
-    socket.on('ping', () => {
-        socket.emit('pong');
-    })
+  socket.on("ping", () => {
+    socket.emit("pong");
+  });
 
-    socket.on('time_sync', (requestId: number, clientTime: number) => {
+  socket.on("time_sync", (requestId: number, clientTime: number) => {
     if (!Number.isSafeInteger(requestId)) return;
     if (!Number.isSafeInteger(clientTime)) return;
 
     service.onTimeSync(socket, requestId, clientTime);
-    })
+  });
 
-    socket.on('room_options', (options) => {
+  socket.on("room_options", (options: RoomOptions) => {
     if (!options) return;
-        if (!options.timelineName || typeof (options.timelineName) !== 'string') return;
+    if (!options.timelineName || typeof options.timelineName !== "string")
+      return;
     if (!Number.isSafeInteger(options.seekTime)) return;
 
     service.onSetRoomOptions(socket, options);
   });
 
-    socket.on('request_start', (options) => {
+  socket.on("request_start", () => {
     service.onRequestStart(socket);
   });
 
-    socket.on('request_join', (roomId: number) => {
-        if (!Number.isSafeInteger(roomId)) return;
+  socket.on(
+    "request_join",
+    async (roomId: number, callback: (err?: string, res?: boolean) => void) => {
+      if (!Number.isSafeInteger(roomId)) {
+        return callback("Invalid roomId.");
+      }
 
-        service.onRequestJoin(socket, roomId);
-    });
+      if (!service.hasRoomId(roomId)) {
+        // cannot join a room that does not exist.
+        return callback(undefined, false);
+      }
 
-    socket.on('request_ready', () => {
-        service.onRequestReady(socket);
-    })
+      try {
+        const didJoinRoom = await service.onRequestJoin(socket, roomId);
+        callback(undefined, didJoinRoom);
+      } catch (e) {
+        callback(e instanceof Error ? e.message : "Unknown error.");
+      }
+    }
+  );
 
-    socket.on('request_join_random', () => {
-        service.onRequestJoinRandom(socket);
-    })
+  socket.on("request_set_ready", () => {
+    service.onRequestSetReady(socket);
+  });
 
-    socket.on('call', (id: number, name: string, params: any) => {
-        if (!Number.isSafeInteger(id)) return;
-        // noinspection SuspiciousTypeOfGuard
-        if (!name || typeof (name) !== 'string') return;
-        // if (!params) return;
+  socket.on("request_join_random", async () => {
+    await service.onRequestJoinRandom(socket);
+  });
 
-        let call = new Call(socket, id, name, params);
+  socket.on(
+    "submit_ticker_message",
+    (message?: unknown, callback?: (res?: null, err?: string) => void) => {
+      if (typeof message !== "string") {
+        return callback && callback(null, "Invalid message.");
+      }
 
-        if (name == 'room_exists') {
-            let roomId = params && params['roomId'];
-            if (!Number.isSafeInteger(roomId)) {
-                call.error('Invalid room id');
-                return;
+      if (message.length > 192) {
+        // perfect voor het Wilhelmus
+        return callback && callback(null, "Message too long.");
       }
 
-            call.respond(service.hasRoomId(roomId));
-            return;
+      try {
+        service.submitTickerMessage(socket, message);
+        return callback && callback();
+      } catch (e) {
+        console.error(e);
+        return (
+          callback &&
+          callback(null, e instanceof Error ? e.message : "Unknown error")
+        );
       }
-        //
+    }
+  );
+
+  service.onSocketConnect(socket);
+
   // if (name == 'request_join') {
   //     let roomId = params && params['roomId'];
   //     if (!Number.isSafeInteger(roomId)) {
@@ -95,9 +126,6 @@ io.on('connection', socket => {
   //         call.respond(false);
   //     }
   // }
-    })
-
-    service.onSocketConnect(socket);
 
   /*socket.on('join_room', (roomId, callback) => {
         if (!callback || typeof callback !== 'function') {
@@ -157,31 +185,3 @@ io.on('connection', socket => {
         }
     });*/
 });
-
-class Call {
-    private socket: Socket;
-    private id: number;
-    private name: string;
-    private params: any;
-
-    constructor(socket: Socket, id: number, name: string, params: any) {
-        this.socket = socket;
-        this.id = id;
-        this.name = name;
-        this.params = params;
-    }
-
-    error(reason: string) {
-        this.socket.emit('call_response', {
-            'id': this.id,
-            'error': reason
-        })
-    }
-
-    respond(data: any) {
-        this.socket.emit('call_response', {
-            'id': this.id,
-            'response': data
-        });
-    }
-}

backend/src/timeline.ts

@@ -1,62 +1,11 @@
-// @ts-ignore
-import timeline from '../data/timelines.js';
-
+import timeline from "./data/timelines";
 
 export function getTimelineNames(): string[] {
-    return timeline.timelines.map((i: any) => i.name)
+  return timeline.timelines.map((timeline) => timeline.name);
 }
 
 export function getTimeline(name: string) {
-    let t = timeline.timelines.find((i: any) => i.name == name);
+  const t = timeline.timelines.find((t) => t.name == name);
   if (!t) return null;
   return t;
 }
-
-/**
- *
- * @param i
- * @returns {*}
- */
-export function getIndex(i: number): any {
-    if (i >= timeline.length) {
-        return;
-    }
-
-    return timeline[i];
-}
-
-/**
- * @param {number} i - the index.
- * @returns {{count: number, timestamp: number}|undefined}
- */
-export function getNextShot(i: number) {
-    for (; i < timeline.length; i++) {
-        const time = getIndex(i);
-
-        for (let event of time.events) {
-            if (event.type === 'shot') {
-                return {
-                    timestamp: time.timestamp,
-                    count: event.shotCount
-                }
-            }
-        }
-    }
-
-    return undefined;
-}
-
-export function indexForTime(seconds: number): number {
-    let lastIndex = 0;
-    for (let i = 0; i < timeline.length; i++) {
-        const time = timeline[i];
-
-        if (time.timestamp >= seconds) {
-            return lastIndex;
-        }
-
-        lastIndex = i;
-    }
-
-    return -1;
-}

backend/src/util.ts

@@ -13,8 +13,6 @@ export function randomInt(min: number, max: number): number {
 let _randomTimeOffsetForDebug = randomInt(-10000, 10000);
 _randomTimeOffsetForDebug = 0;
 
-console.log('random time offset', _randomTimeOffsetForDebug);
-
 export function getCurrentTime() {
   return Date.now() + _randomTimeOffsetForDebug;
 }

backend/tsconfig.json

@@ -1,8 +1,12 @@
 {
   "compilerOptions": {
+    "outDir": "build",
     "target": "es6",
     "module": "commonjs",
     "strict": true,
     "esModuleInterop": true
-  }
+  },
+  "include": [
+    "src"
+  ]
 }

backend/yarn.lock

@@ -1,739 +0,0 @@
-# THIS IS AN AUTOGENERATED FILE. DO NOT EDIT THIS FILE DIRECTLY.
-# yarn lockfile v1
-
-
-"@types/body-parser@*":
-  version "1.19.0"
-  resolved "https://registry.yarnpkg.com/@types/body-parser/-/body-parser-1.19.0.tgz#0685b3c47eb3006ffed117cdd55164b61f80538f"
-  integrity sha512-W98JrE0j2K78swW4ukqMleo8R7h/pFETjM2DQ90MF6XK2i4LO4W3gQ71Lt4w3bfm2EvVSyWHplECvB5sK22yFQ==
-  dependencies:
-    "@types/connect" "*"
-    "@types/node" "*"
-
-"@types/connect@*":
-  version "3.4.33"
-  resolved "https://registry.yarnpkg.com/@types/connect/-/connect-3.4.33.tgz#31610c901eca573b8713c3330abc6e6b9f588546"
-  integrity sha512-2+FrkXY4zllzTNfJth7jOqEHC+enpLeGslEhpnTAkg21GkRrWV4SsAtqchtT4YS9/nODBU2/ZfsBY2X4J/dX7A==
-  dependencies:
-    "@types/node" "*"
-
-"@types/express-serve-static-core@*":
-  version "4.17.5"
-  resolved "https://registry.yarnpkg.com/@types/express-serve-static-core/-/express-serve-static-core-4.17.5.tgz#a00ac7dadd746ae82477443e4d480a6a93ea083c"
-  integrity sha512-578YH5Lt88AKoADy0b2jQGwJtrBxezXtVe/MBqWXKZpqx91SnC0pVkVCcxcytz3lWW+cHBYDi3Ysh0WXc+rAYw==
-  dependencies:
-    "@types/node" "*"
-    "@types/range-parser" "*"
-
-"@types/express@^4.17.6":
-  version "4.17.6"
-  resolved "https://registry.yarnpkg.com/@types/express/-/express-4.17.6.tgz#6bce49e49570507b86ea1b07b806f04697fac45e"
-  integrity sha512-n/mr9tZI83kd4azlPG5y997C/M4DNABK9yErhFM6hKdym4kkmd9j0vtsJyjFIwfRBxtrxZtAfGZCNRIBMFLK5w==
-  dependencies:
-    "@types/body-parser" "*"
-    "@types/express-serve-static-core" "*"
-    "@types/qs" "*"
-    "@types/serve-static" "*"
-
-"@types/mime@*":
-  version "2.0.1"
-  resolved "https://registry.yarnpkg.com/@types/mime/-/mime-2.0.1.tgz#dc488842312a7f075149312905b5e3c0b054c79d"
-  integrity sha512-FwI9gX75FgVBJ7ywgnq/P7tw+/o1GUbtP0KzbtusLigAOgIgNISRK0ZPl4qertvXSIE8YbsVJueQ90cDt9YYyw==
-
-"@types/node@*":
-  version "13.9.2"
-  resolved "https://registry.yarnpkg.com/@types/node/-/node-13.9.2.tgz#ace1880c03594cc3e80206d96847157d8e7fa349"
-  integrity sha512-bnoqK579sAYrQbp73wwglccjJ4sfRdKU7WNEZ5FW4K2U6Kc0/eZ5kvXG0JKsEKFB50zrFmfFt52/cvBbZa7eXg==
-
-"@types/qs@*":
-  version "6.9.1"
-  resolved "https://registry.yarnpkg.com/@types/qs/-/qs-6.9.1.tgz#937fab3194766256ee09fcd40b781740758617e7"
-  integrity sha512-lhbQXx9HKZAPgBkISrBcmAcMpZsmpe/Cd/hY7LGZS5OfkySUBItnPZHgQPssWYUET8elF+yCFBbP1Q0RZPTdaw==
-
-"@types/range-parser@*":
-  version "1.2.3"
-  resolved "https://registry.yarnpkg.com/@types/range-parser/-/range-parser-1.2.3.tgz#7ee330ba7caafb98090bece86a5ee44115904c2c"
-  integrity sha512-ewFXqrQHlFsgc09MK5jP5iR7vumV/BYayNC6PgJO2LPe8vrnNFyjQjSppfEngITi0qvfKtzFvgKymGheFM9UOA==
-
-"@types/serve-static@*":
-  version "1.13.3"
-  resolved "https://registry.yarnpkg.com/@types/serve-static/-/serve-static-1.13.3.tgz#eb7e1c41c4468272557e897e9171ded5e2ded9d1"
-  integrity sha512-oprSwp094zOglVrXdlo/4bAHtKTAxX6VT8FOZlBKrmyLbNvE1zxZyJ6yikMVtHIvwP45+ZQGJn+FdXGKTozq0g==
-  dependencies:
-    "@types/express-serve-static-core" "*"
-    "@types/mime" "*"
-
-"@types/socket.io@^2.1.4":
-  version "2.1.4"
-  resolved "https://registry.yarnpkg.com/@types/socket.io/-/socket.io-2.1.4.tgz#674e7bc193c5ccdadd4433f79f3660d31759e9ac"
-  integrity sha512-cI98INy7tYnweTsUlp8ocveVdAxENUThO0JsLSCs51cjOP2yV5Mqo5QszMDPckyRRA+PO6+wBgKvGvHUCc23TQ==
-  dependencies:
-    "@types/node" "*"
-
-accepts@~1.3.4, accepts@~1.3.7:
-  version "1.3.7"
-  resolved "https://registry.yarnpkg.com/accepts/-/accepts-1.3.7.tgz#531bc726517a3b2b41f850021c6cc15eaab507cd"
-  integrity sha512-Il80Qs2WjYlJIBNzNkK6KYqlVMTbZLXgHx2oT0pU/fjRHyEp+PEfEPY0R3WCwAGVOtauxh1hOxNgIf5bv7dQpA==
-  dependencies:
-    mime-types "~2.1.24"
-    negotiator "0.6.2"
-
-after@0.8.2:
-  version "0.8.2"
-  resolved "https://registry.yarnpkg.com/after/-/after-0.8.2.tgz#fedb394f9f0e02aa9768e702bda23b505fae7e1f"
-  integrity sha1-/ts5T58OAqqXaOcCvaI7UF+ufh8=
-
-arg@^4.1.0:
-  version "4.1.3"
-  resolved "https://registry.yarnpkg.com/arg/-/arg-4.1.3.tgz#269fc7ad5b8e42cb63c896d5666017261c144089"
-  integrity sha512-58S9QDqG0Xx27YwPSt9fJxivjYl432YCwfDMfZ+71RAqUrZef7LrKQZ3LHLOwCS4FLNBplP533Zx895SeOCHvA==
-
-array-flatten@1.1.1:
-  version "1.1.1"
-  resolved "https://registry.yarnpkg.com/array-flatten/-/array-flatten-1.1.1.tgz#9a5f699051b1e7073328f2a008968b64ea2955d2"
-  integrity sha1-ml9pkFGx5wczKPKgCJaLZOopVdI=
-
-arraybuffer.slice@~0.0.7:
-  version "0.0.7"
-  resolved "https://registry.yarnpkg.com/arraybuffer.slice/-/arraybuffer.slice-0.0.7.tgz#3bbc4275dd584cc1b10809b89d4e8b63a69e7675"
-  integrity sha512-wGUIVQXuehL5TCqQun8OW81jGzAWycqzFF8lFp+GOM5BXLYj3bKNsYC4daB7n6XjCqxQA/qgTJ+8ANR3acjrog==
-
-async-limiter@~1.0.0:
-  version "1.0.1"
-  resolved "https://registry.yarnpkg.com/async-limiter/-/async-limiter-1.0.1.tgz#dd379e94f0db8310b08291f9d64c3209766617fd"
-  integrity sha512-csOlWGAcRFJaI6m+F2WKdnMKr4HhdhFVBk0H/QbJFMCr+uO2kwohwXQPxw/9OCxp05r5ghVBFSyioixx3gfkNQ==
-
-backo2@1.0.2:
-  version "1.0.2"
-  resolved "https://registry.yarnpkg.com/backo2/-/backo2-1.0.2.tgz#31ab1ac8b129363463e35b3ebb69f4dfcfba7947"
-  integrity sha1-MasayLEpNjRj41s+u2n038+6eUc=
-
-base64-arraybuffer@0.1.5:
-  version "0.1.5"
-  resolved "https://registry.yarnpkg.com/base64-arraybuffer/-/base64-arraybuffer-0.1.5.tgz#73926771923b5a19747ad666aa5cd4bf9c6e9ce8"
-  integrity sha1-c5JncZI7Whl0etZmqlzUv5xunOg=
-
-base64id@2.0.0:
-  version "2.0.0"
-  resolved "https://registry.yarnpkg.com/base64id/-/base64id-2.0.0.tgz#2770ac6bc47d312af97a8bf9a634342e0cd25cb6"
-  integrity sha512-lGe34o6EHj9y3Kts9R4ZYs/Gr+6N7MCaMlIFA3F1R2O5/m7K06AxfSeO5530PEERE6/WyEg3lsuyw4GHlPZHog==
-
-better-assert@~1.0.0:
-  version "1.0.2"
-  resolved "https://registry.yarnpkg.com/better-assert/-/better-assert-1.0.2.tgz#40866b9e1b9e0b55b481894311e68faffaebc522"
-  integrity sha1-QIZrnhueC1W0gYlDEeaPr/rrxSI=
-  dependencies:
-    callsite "1.0.0"
-
-blob@0.0.5:
-  version "0.0.5"
-  resolved "https://registry.yarnpkg.com/blob/-/blob-0.0.5.tgz#d680eeef25f8cd91ad533f5b01eed48e64caf683"
-  integrity sha512-gaqbzQPqOoamawKg0LGVd7SzLgXS+JH61oWprSLH+P+abTczqJbhTR8CmJ2u9/bUYNmHTGJx/UEmn6doAvvuig==
-
-body-parser@1.19.0:
-  version "1.19.0"
-  resolved "https://registry.yarnpkg.com/body-parser/-/body-parser-1.19.0.tgz#96b2709e57c9c4e09a6fd66a8fd979844f69f08a"
-  integrity sha512-dhEPs72UPbDnAQJ9ZKMNTP6ptJaionhP5cBb541nXPlW60Jepo9RV/a4fX4XWW9CuFNK22krhrj1+rgzifNCsw==
-  dependencies:
-    bytes "3.1.0"
-    content-type "~1.0.4"
-    debug "2.6.9"
-    depd "~1.1.2"
-    http-errors "1.7.2"
-    iconv-lite "0.4.24"
-    on-finished "~2.3.0"
-    qs "6.7.0"
-    raw-body "2.4.0"
-    type-is "~1.6.17"
-
-buffer-from@^1.0.0:
-  version "1.1.1"
-  resolved "https://registry.yarnpkg.com/buffer-from/-/buffer-from-1.1.1.tgz#32713bc028f75c02fdb710d7c7bcec1f2c6070ef"
-  integrity sha512-MQcXEUbCKtEo7bhqEs6560Hyd4XaovZlO/k9V3hjVUF/zwW7KBVdSK4gIt/bzwS9MbR5qob+F5jusZsb0YQK2A==
-
-bytes@3.1.0:
-  version "3.1.0"
-  resolved "https://registry.yarnpkg.com/bytes/-/bytes-3.1.0.tgz#f6cf7933a360e0588fa9fde85651cdc7f805d1f6"
-  integrity sha512-zauLjrfCG+xvoyaqLoV8bLVXXNGC4JqlxFCutSDWA6fJrTo2ZuvLYTqZ7aHBLZSMOopbzwv8f+wZcVzfVTI2Dg==
-
-callsite@1.0.0:
-  version "1.0.0"
-  resolved "https://registry.yarnpkg.com/callsite/-/callsite-1.0.0.tgz#280398e5d664bd74038b6f0905153e6e8af1bc20"
-  integrity sha1-KAOY5dZkvXQDi28JBRU+borxvCA=
-
-component-bind@1.0.0:
-  version "1.0.0"
-  resolved "https://registry.yarnpkg.com/component-bind/-/component-bind-1.0.0.tgz#00c608ab7dcd93897c0009651b1d3a8e1e73bbd1"
-  integrity sha1-AMYIq33Nk4l8AAllGx06jh5zu9E=
-
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-  version "1.2.1"
-  resolved "https://registry.yarnpkg.com/component-emitter/-/component-emitter-1.2.1.tgz#137918d6d78283f7df7a6b7c5a63e140e69425e6"
-  integrity sha1-E3kY1teCg/ffemt8WmPhQOaUJeY=
-
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-  version "0.0.3"
-  resolved "https://registry.yarnpkg.com/component-inherit/-/component-inherit-0.0.3.tgz#645fc4adf58b72b649d5cae65135619db26ff143"
-  integrity sha1-ZF/ErfWLcrZJ1crmUTVhnbJv8UM=
-
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-  version "0.5.3"
-  resolved "https://registry.yarnpkg.com/content-disposition/-/content-disposition-0.5.3.tgz#e130caf7e7279087c5616c2007d0485698984fbd"
-  integrity sha512-ExO0774ikEObIAEV9kDo50o+79VCUdEB6n6lzKgGwupcVeRlhrj3qGAfwq8G6uBJjkqLrhT0qEYFcWng8z1z0g==
-  dependencies:
-    safe-buffer "5.1.2"
-
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-  version "1.0.4"
-  resolved "https://registry.yarnpkg.com/content-type/-/content-type-1.0.4.tgz#e138cc75e040c727b1966fe5e5f8c9aee256fe3b"
-  integrity sha512-hIP3EEPs8tB9AT1L+NUqtwOAps4mk2Zob89MWXMHjHWg9milF/j4osnnQLXBCBFBk/tvIG/tUc9mOUJiPBhPXA==
-
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-  version "1.0.6"
-  resolved "https://registry.yarnpkg.com/cookie-signature/-/cookie-signature-1.0.6.tgz#e303a882b342cc3ee8ca513a79999734dab3ae2c"
-  integrity sha1-4wOogrNCzD7oylE6eZmXNNqzriw=
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-  version "0.3.1"
-  resolved "https://registry.yarnpkg.com/cookie/-/cookie-0.3.1.tgz#e7e0a1f9ef43b4c8ba925c5c5a96e806d16873bb"
-  integrity sha1-5+Ch+e9DtMi6klxcWpboBtFoc7s=
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-  version "0.4.0"
-  resolved "https://registry.yarnpkg.com/cookie/-/cookie-0.4.0.tgz#beb437e7022b3b6d49019d088665303ebe9c14ba"
-  integrity sha512-+Hp8fLp57wnUSt0tY0tHEXh4voZRDnoIrZPqlo3DPiI4y9lwg/jqx+1Om94/W6ZaPDOUbnjOt/99w66zk+l1Xg==
-
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-  version "2.6.9"
-  resolved "https://registry.yarnpkg.com/debug/-/debug-2.6.9.tgz#5d128515df134ff327e90a4c93f4e077a536341f"
-  integrity sha512-bC7ElrdJaJnPbAP+1EotYvqZsb3ecl5wi6Bfi6BJTUcNowp6cvspg0jXznRTKDjm/E7AdgFBVeAPVMNcKGsHMA==
-  dependencies:
-    ms "2.0.0"
-
-debug@~3.1.0:
-  version "3.1.0"
-  resolved "https://registry.yarnpkg.com/debug/-/debug-3.1.0.tgz#5bb5a0672628b64149566ba16819e61518c67261"
-  integrity sha512-OX8XqP7/1a9cqkxYw2yXss15f26NKWBpDXQd0/uK/KPqdQhxbPa994hnzjcE2VqQpDslf55723cKPUOGSmMY3g==
-  dependencies:
-    ms "2.0.0"
-
-debug@~4.1.0:
-  version "4.1.1"
-  resolved "https://registry.yarnpkg.com/debug/-/debug-4.1.1.tgz#3b72260255109c6b589cee050f1d516139664791"
-  integrity sha512-pYAIzeRo8J6KPEaJ0VWOh5Pzkbw/RetuzehGM7QRRX5he4fPHx2rdKMB256ehJCkX+XRQm16eZLqLNS8RSZXZw==
-  dependencies:
-    ms "^2.1.1"
-
-depd@~1.1.2:
-  version "1.1.2"
-  resolved "https://registry.yarnpkg.com/depd/-/depd-1.1.2.tgz#9bcd52e14c097763e749b274c4346ed2e560b5a9"
-  integrity sha1-m81S4UwJd2PnSbJ0xDRu0uVgtak=
-
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-  version "1.0.4"
-  resolved "https://registry.yarnpkg.com/destroy/-/destroy-1.0.4.tgz#978857442c44749e4206613e37946205826abd80"
-  integrity sha1-l4hXRCxEdJ5CBmE+N5RiBYJqvYA=
-
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-  integrity sha512-JvdAWfbXeIGaZ9cILp38HntZSFSo3mWg6xGcJJsd+d4aRMOqauag1C63dJfDw7OaMYwEbHMOxEZ1lqVRYP2OAw==
-
-socket.io-adapter@~1.1.0:
-  version "1.1.2"
-  resolved "https://registry.yarnpkg.com/socket.io-adapter/-/socket.io-adapter-1.1.2.tgz#ab3f0d6f66b8fc7fca3959ab5991f82221789be9"
-  integrity sha512-WzZRUj1kUjrTIrUKpZLEzFZ1OLj5FwLlAFQs9kuZJzJi5DKdU7FsWc36SNmA8iDOtwBQyT8FkrriRM8vXLYz8g==
-
-socket.io-client@2.3.0:
-  version "2.3.0"
-  resolved "https://registry.yarnpkg.com/socket.io-client/-/socket.io-client-2.3.0.tgz#14d5ba2e00b9bcd145ae443ab96b3f86cbcc1bb4"
-  integrity sha512-cEQQf24gET3rfhxZ2jJ5xzAOo/xhZwK+mOqtGRg5IowZsMgwvHwnf/mCRapAAkadhM26y+iydgwsXGObBB5ZdA==
-  dependencies:
-    backo2 "1.0.2"
-    base64-arraybuffer "0.1.5"
-    component-bind "1.0.0"
-    component-emitter "1.2.1"
-    debug "~4.1.0"
-    engine.io-client "~3.4.0"
-    has-binary2 "~1.0.2"
-    has-cors "1.1.0"
-    indexof "0.0.1"
-    object-component "0.0.3"
-    parseqs "0.0.5"
-    parseuri "0.0.5"
-    socket.io-parser "~3.3.0"
-    to-array "0.1.4"
-
-socket.io-parser@~3.3.0:
-  version "3.3.0"
-  resolved "https://registry.yarnpkg.com/socket.io-parser/-/socket.io-parser-3.3.0.tgz#2b52a96a509fdf31440ba40fed6094c7d4f1262f"
-  integrity sha512-hczmV6bDgdaEbVqhAeVMM/jfUfzuEZHsQg6eOmLgJht6G3mPKMxYm75w2+qhAQZ+4X+1+ATZ+QFKeOZD5riHng==
-  dependencies:
-    component-emitter "1.2.1"
-    debug "~3.1.0"
-    isarray "2.0.1"
-
-socket.io-parser@~3.4.0:
-  version "3.4.0"
-  resolved "https://registry.yarnpkg.com/socket.io-parser/-/socket.io-parser-3.4.0.tgz#370bb4a151df2f77ce3345ff55a7072cc6e9565a"
-  integrity sha512-/G/VOI+3DBp0+DJKW4KesGnQkQPFmUCbA/oO2QGT6CWxU7hLGWqU3tyuzeSK/dqcyeHsQg1vTe9jiZI8GU9SCQ==
-  dependencies:
-    component-emitter "1.2.1"
-    debug "~4.1.0"
-    isarray "2.0.1"
-
-socket.io@^2.3.0:
-  version "2.3.0"
-  resolved "https://registry.yarnpkg.com/socket.io/-/socket.io-2.3.0.tgz#cd762ed6a4faeca59bc1f3e243c0969311eb73fb"
-  integrity sha512-2A892lrj0GcgR/9Qk81EaY2gYhCBxurV0PfmmESO6p27QPrUK1J3zdns+5QPqvUYK2q657nSj0guoIil9+7eFg==
-  dependencies:
-    debug "~4.1.0"
-    engine.io "~3.4.0"
-    has-binary2 "~1.0.2"
-    socket.io-adapter "~1.1.0"
-    socket.io-client "2.3.0"
-    socket.io-parser "~3.4.0"
-
-source-map-support@^0.5.17:
-  version "0.5.19"
-  resolved "https://registry.yarnpkg.com/source-map-support/-/source-map-support-0.5.19.tgz#a98b62f86dcaf4f67399648c085291ab9e8fed61"
-  integrity sha512-Wonm7zOCIJzBGQdB+thsPar0kYuCIzYvxZwlBa87yi/Mdjv7Tip2cyVbLj5o0cFPN4EVkuTwb3GDDyUx2DGnGw==
-  dependencies:
-    buffer-from "^1.0.0"
-    source-map "^0.6.0"
-
-source-map@^0.6.0:
-  version "0.6.1"
-  resolved "https://registry.yarnpkg.com/source-map/-/source-map-0.6.1.tgz#74722af32e9614e9c287a8d0bbde48b5e2f1a263"
-  integrity sha512-UjgapumWlbMhkBgzT7Ykc5YXUT46F0iKu8SGXq0bcwP5dz/h0Plj6enJqjz1Zbq2l5WaqYnrVbwWOWMyF3F47g==
-
-"statuses@>= 1.5.0 < 2", statuses@~1.5.0:
-  version "1.5.0"
-  resolved "https://registry.yarnpkg.com/statuses/-/statuses-1.5.0.tgz#161c7dac177659fd9811f43771fa99381478628c"
-  integrity sha1-Fhx9rBd2Wf2YEfQ3cfqZOBR4Yow=
-
-to-array@0.1.4:
-  version "0.1.4"
-  resolved "https://registry.yarnpkg.com/to-array/-/to-array-0.1.4.tgz#17e6c11f73dd4f3d74cda7a4ff3238e9ad9bf890"
-  integrity sha1-F+bBH3PdTz10zaek/zI46a2b+JA=
-
-toidentifier@1.0.0:
-  version "1.0.0"
-  resolved "https://registry.yarnpkg.com/toidentifier/-/toidentifier-1.0.0.tgz#7e1be3470f1e77948bc43d94a3c8f4d7752ba553"
-  integrity sha512-yaOH/Pk/VEhBWWTlhI+qXxDFXlejDGcQipMlyxda9nthulaxLZUNcUqFxokp0vcYnvteJln5FNQDRrxj3YcbVw==
-
-ts-node@^8.8.2:
-  version "8.9.0"
-  resolved "https://registry.yarnpkg.com/ts-node/-/ts-node-8.9.0.tgz#d7bf7272dcbecd3a2aa18bd0b96c7d2f270c15d4"
-  integrity sha512-rwkXfOs9zmoHrV8xE++dmNd6ZIS+nmHHCxcV53ekGJrxFLMbp+pizpPS07ARvhwneCIECPppOwbZHvw9sQtU4w==
-  dependencies:
-    arg "^4.1.0"
-    diff "^4.0.1"
-    make-error "^1.1.1"
-    source-map-support "^0.5.17"
-    yn "3.1.1"
-
-type-is@~1.6.17, type-is@~1.6.18:
-  version "1.6.18"
-  resolved "https://registry.yarnpkg.com/type-is/-/type-is-1.6.18.tgz#4e552cd05df09467dcbc4ef739de89f2cf37c131"
-  integrity sha512-TkRKr9sUTxEH8MdfuCSP7VizJyzRNMjj2J2do2Jr3Kym598JVdEksuzPQCnlFPW4ky9Q+iA+ma9BGm06XQBy8g==
-  dependencies:
-    media-typer "0.3.0"
-    mime-types "~2.1.24"
-
-typescript@^3.8.3:
-  version "3.8.3"
-  resolved "https://registry.yarnpkg.com/typescript/-/typescript-3.8.3.tgz#409eb8544ea0335711205869ec458ab109ee1061"
-  integrity sha512-MYlEfn5VrLNsgudQTVJeNaQFUAI7DkhnOjdpAp4T+ku1TfQClewlbSuTVHiA+8skNBgaf02TL/kLOvig4y3G8w==
-
-unpipe@1.0.0, unpipe@~1.0.0:
-  version "1.0.0"
-  resolved "https://registry.yarnpkg.com/unpipe/-/unpipe-1.0.0.tgz#b2bf4ee8514aae6165b4817829d21b2ef49904ec"
-  integrity sha1-sr9O6FFKrmFltIF4KdIbLvSZBOw=
-
-utils-merge@1.0.1:
-  version "1.0.1"
-  resolved "https://registry.yarnpkg.com/utils-merge/-/utils-merge-1.0.1.tgz#9f95710f50a267947b2ccc124741c1028427e713"
-  integrity sha1-n5VxD1CiZ5R7LMwSR0HBAoQn5xM=
-
-vary@~1.1.2:
-  version "1.1.2"
-  resolved "https://registry.yarnpkg.com/vary/-/vary-1.1.2.tgz#2299f02c6ded30d4a5961b0b9f74524a18f634fc"
-  integrity sha1-IpnwLG3tMNSllhsLn3RSShj2NPw=
-
-ws@^7.1.2:
-  version "7.2.3"
-  resolved "https://registry.yarnpkg.com/ws/-/ws-7.2.3.tgz#a5411e1fb04d5ed0efee76d26d5c46d830c39b46"
-  integrity sha512-HTDl9G9hbkNDk98naoR/cHDws7+EyYMOdL1BmjsZXRUjf7d+MficC4B7HLUPlSiho0vg+CWKrGIt/VJBd1xunQ==
-
-ws@~6.1.0:
-  version "6.1.4"
-  resolved "https://registry.yarnpkg.com/ws/-/ws-6.1.4.tgz#5b5c8800afab925e94ccb29d153c8d02c1776ef9"
-  integrity sha512-eqZfL+NE/YQc1/ZynhojeV8q+H050oR8AZ2uIev7RU10svA9ZnJUddHcOUZTJLinZ9yEfdA2kSATS2qZK5fhJA==
-  dependencies:
-    async-limiter "~1.0.0"
-
-xmlhttprequest-ssl@~1.5.4:
-  version "1.5.5"
-  resolved "https://registry.yarnpkg.com/xmlhttprequest-ssl/-/xmlhttprequest-ssl-1.5.5.tgz#c2876b06168aadc40e57d97e81191ac8f4398b3e"
-  integrity sha1-wodrBhaKrcQOV9l+gRkayPQ5iz4=
-
-yeast@0.1.2:
-  version "0.1.2"
-  resolved "https://registry.yarnpkg.com/yeast/-/yeast-0.1.2.tgz#008e06d8094320c372dbc2f8ed76a0ca6c8ac419"
-  integrity sha1-AI4G2AlDIMNy28L47XagymyKxBk=
-
-yn@3.1.1:
-  version "3.1.1"
-  resolved "https://registry.yarnpkg.com/yn/-/yn-3.1.1.tgz#1e87401a09d767c1d5eab26a6e4c185182d2eb50"
-  integrity sha512-Ux4ygGWsu2c7isFWe8Yu1YluJmqVhxqK2cLXNQA5AcC3QfbGNpM7fu0Y8b/z16pXLnFxZYvWhd3fhBY9DLmC6Q==

frontend/.eslintrc.js

@@ -0,0 +1,23 @@
+module.exports = {
+  "ignorePatterns": [".eslintrc.js", "vite.config.ts", "postcss.config.js"],
+  "settings": {
+    "react": {
+      "version": "detect"
+    }
+  },
+  "parserOptions": {
+    "tsconfigRootDir": __dirname,
+    "project": ["./tsconfig.json"]
+  },
+  "extends": [
+      "plugin:react/recommended"
+  ],
+  "rules": {
+    // suppress errors for missing 'import React' in files
+   "react/react-in-jsx-scope": "off",
+    // At some point these must be set to "error"
+    "@typescript-eslint/no-unsafe-member-access": "warn",
+    "@typescript-eslint/no-unsafe-assignment": "warn",
+    "@typescript-eslint/no-unsafe-argument": "warn"
+  }
+};

frontend/Dockerfile

@@ -1,14 +1,16 @@
-FROM node:13-alpine AS build
+FROM node:16-alpine AS build
 WORKDIR /app
 
-COPY package.json yarn.lock config-overrides.js  ./
-RUN yarn install
+# Install TS manually since it's only included in the parent's package.json
+RUN npm install --global typescript@^4.5.2
+COPY package.json package-lock.json vite.config.ts  ./
+RUN npm ci --no-progress --no-optional
 
-COPY tsconfig.json ./
+COPY tsconfig.json postcss.config.js index.html ./
 COPY public public/
 COPY src src/
 
-RUN yarn build
+RUN npm run build
 
 FROM nginx:alpine
 WORKDIR /app

frontend/config-overrides.js

@@ -1,25 +0,0 @@
-module.exports = {
-    webpack: function (config, env) {
-        return config;
-    },
-    devServer: function (configFunction) {
-        // Return the replacement function for create-react-app to use to generate the Webpack
-        // Development Server config. "configFunction" is the function that would normally have
-        // been used to generate the Webpack Development server config - you can use it to create
-        // a starting configuration to then modify instead of having to create a config from scratch.
-        return function (proxy, allowedHost) {
-            // Create the default config by calling configFunction with the proxy/allowedHost parameters
-            const config = configFunction(proxy, allowedHost);
-
-            config.proxy = {
-                "/socket.io": {
-                    target: "http://localhost:3001",
-                    ws: true
-                }
-            }
-
-            // Return your customised Webpack Development Server config.
-            return config;
-        };
-    }
-}

frontend/index.html

@@ -0,0 +1,21 @@
+<!DOCTYPE html>
+<html lang="en">
+  <head>
+    <meta charset="utf-8" />
+    <link rel="icon" href="/harambee.ico" />
+    <meta name="viewport" content="width=device-width, initial-scale=1" />
+    <meta name="theme-color" content="#304ba3" />
+    <meta
+      name="description"
+      content="Centurion: Honderd minuten... Honderd shots... Kan jij het aan?"
+    />
+    <link rel="apple-touch-icon" href="/logo192.png" />
+    <link rel="manifest" href="/manifest.json" />
+    <title>Centurion</title>
+  </head>
+  <body>
+    <noscript>You need to enable JavaScript to run this app.</noscript>
+    <div id="root"></div>
+    <script type="module" src="/src/index.tsx"></script>
+  </body>
+</html>

frontend/package.json

@@ -3,35 +3,38 @@
   "version": "0.1.0",
   "private": true,
   "dependencies": {
-    "@testing-library/jest-dom": "^4.2.4",
-    "@testing-library/react": "^9.4.0",
-    "@testing-library/user-event": "^7.2.1",
-    "@types/jest": "^24.9.1",
-    "@types/node": "^12.12.27",
-    "@types/react": "^16.9.19",
-    "@types/react-dom": "^16.9.5",
-    "@types/react-transition-group": "^4.2.3",
-    "antd": "^4.1.4",
-    "node-sass": "^4.13.1",
-    "query-string": "^6.12.1",
-    "react": "^16.12.0",
-    "react-dom": "^16.12.0",
-    "react-scripts": "^3.4.0",
-    "react-transition-group": "^4.3.0",
-    "socket.io-client": "^2.3.0",
-    "sscaffold-css": "^0.1.0",
-    "typescript": "^3.7.5",
-    "use-query-params": "^0.6.0",
-    "use-socketio": "^2.0.0"
+    "antd": "^4.17.2",
+    "react": "^17.0.2",
+    "react-dom": "^17.0.2",
+    "react-ticker": "^1.3.0",
+    "react-transition-group": "^4.4.2",
+    "socket.io-client": "^4.4.0"
   },
-  "scripts": {
-    "start": "react-app-rewired start",
-    "build": "react-app-rewired build",
-    "test": "react-app-rewired test",
-    "eject": "react-scripts eject"
+  "devDependencies": {
+    "@testing-library/jest-dom": "^5.15.1",
+    "@testing-library/react": "^12.1.2",
+    "@testing-library/user-event": "^13.5.0",
+    "@types/jest": "^27.0.3",
+    "@types/react": "^17.0.37",
+    "@types/react-dom": "^17.0.11",
+    "@types/react-transition-group": "^4.4.4",
+    "@types/socket.io-client": "^1.4.36",
+    "@vitejs/plugin-react": "^1.1.1",
+    "autoprefixer": "^10.4.0",
+    "less": "^4.1.2",
+    "postcss": "^8.4.4",
+    "postcss-nested": "^5.0.6",
+    "vite": "^2.7.1",
+    "vite-plugin-imp": "^2.0.10",
+    "vite-plugin-svgr": "^0.6.0"
   },
-  "eslintConfig": {
-    "extends": "react-app"
+  "scripts": {
+    "start": "vite",
+    "build": "tsc && vite build",
+    "serve": "vite preview",
+    "check": "tsc --noEmit",
+    "lint": "eslint 'src/**/*.{ts,tsx}'",
+    "fix": "eslint --fix 'src/**/*.{ts,tsx}'"
   },
   "browserslist": {
     "production": [
@@ -44,12 +47,5 @@
       "last 1 firefox version",
       "last 1 safari version"
     ]
-  },
-  "devDependencies": {
-    "@types/socket.io-client": "^1.4.32",
-    "customize-cra": "^0.9.1",
-    "eslint-plugin-react-hooks": "^2.3.0",
-    "react-app-rewired": "^2.1.5",
-    "workerize-loader": "^1.1.0"
   }
 }

frontend/postcss.config.js

@@ -0,0 +1,6 @@
+module.exports = {
+  plugins: [
+    require('autoprefixer'),
+    require('postcss-nested'),
+  ]
+}

frontend/public/index.html

@@ -1,39 +0,0 @@
-<!DOCTYPE html>
-<html lang="en">
-  <head>
-    <meta charset="utf-8" />
-    <link rel="icon" href="%PUBLIC_URL%/harambee.ico" />
-    <meta name="viewport" content="width=device-width, initial-scale=1" />
-    <meta name="theme-color" content="#000000" />
-    <meta
-      name="description"
-      content="Web site created using create-react-app"
-    />
-    <link rel="apple-touch-icon" href="%PUBLIC_URL%/logo192.png" />
-    <link rel="manifest" href="%PUBLIC_URL%/manifest.json" />
-    <!--
-      Notice the use of %PUBLIC_URL% in the tags above.
-      It will be replaced with the URL of the `public` folder during the build.
-      Only files inside the `public` folder can be referenced from the HTML.
-
-      Unlike "/favicon.ico" or "favicon.ico", "%PUBLIC_URL%/favicon.ico" will
-      work correctly both with client-side routing and a non-root public URL.
-      Learn how to configure a non-root public URL by running `npm run build`.
-    -->
-    <title>Centurion</title>
-  </head>
-  <body>
-    <noscript>You need to enable JavaScript to run this app.</noscript>
-    <div id="root"></div>
-    <!--
-      This HTML file is a template.
-      If you open it directly in the browser, you will see an empty page.
-
-      You can add webfonts, meta tags, or analytics to this file.
-      The build step will place the bundled scripts into the <body> tag.
-
-      To begin the development, run `npm start` or `yarn start`.
-      To create a production bundle, use `npm run build` or `yarn build`.
-    -->
-  </body>
-</html>

frontend/public/manifest.json

@@ -1,9 +1,9 @@
 {
-  "short_name": "React App",
-  "name": "Create React App Sample",
+  "short_name": "Centurion",
+  "name": "Centurion: honderd minuten...",
   "icons": [
     {
-      "src": "harambee.ico",
+      "src": "favicon.ico",
       "sizes": "64x64 32x32 24x24 16x16",
       "type": "image/x-icon"
     },
@@ -20,6 +20,6 @@
   ],
   "start_url": ".",
   "display": "standalone",
-  "theme_color": "#000000",
+  "theme_color": "#304ba3",
   "background_color": "#ffffff"
 }

frontend/public/robots.txt

@@ -1,2 +1,3 @@
 # https://www.robotstxt.org/robotstxt.html
 User-agent: *
+Disallow: /

frontend/src/components/App.tsx

@@ -1,11 +0,0 @@
-import React from 'react';
-
-import Centurion from "./Centurion";
-
-const App = () => {
-    return (
-        <Centurion/>
-    );
-};
-
-export default App;

frontend/src/components/Centurion.tsx

@@ -1,45 +1,25 @@
-import React from "react";
-import {Row} from "antd";
+import React, { useState } from "react";
 
-import {useRoomRunningAndReadyChanged} from "../lib/Connection";
-import NextShot from "./NextShot";
+import { useRoomRunningAndReadyChanged } from "../lib/Connection";
 import Feed from "./Feed";
-import ShotsTaken from "./ShotsTaken";
 import Lobby from "./Lobby";
 
-import logo from "../img/via-logo.svg";
-import haramlogo from "../img/harambee_logo.png";
-import Player from "./Player";
-
 const Centurion = () => {
+  const [currentUserReady, setCurrentUserReady] = useState(false);
   const room = useRoomRunningAndReadyChanged();
-    const showFeed = (room?.running && room.readyToParticipate) || false;
-
-    const feedContent = (
-        <React.Fragment>
-            <Row>
-                <NextShot/>
-                <Feed/>
-                <ShotsTaken/>
-            </Row>
-            <Player/>
-        </React.Fragment>
-    );
-
-    const lobbyContent = (
-        <Lobby/>
-    );
+  const showFeed = (room?.readyToParticipate && currentUserReady) || false;
 
   return (
-        <>
     <section className="content">
-                {showFeed ? feedContent : lobbyContent}
+      {showFeed ? (
+        <Feed />
+      ) : (
+        <Lobby
+          currentUserReady={currentUserReady}
+          onCurrentUserReadyChange={(b: boolean) => setCurrentUserReady(b)}
+        />
+      )}
     </section>
-            <footer>
-                <img src={haramlogo} className="haram-logo" alt="haramlogo"/>
-                <img src={logo} className="via-logo" alt="logo"/>
-            </footer>
-        </>
   );
 };
 

frontend/src/components/Feed.tsx

@@ -1,39 +1,219 @@
-import React from 'react';
-import {Col} from "antd"
+import React, { useRef, useState } from "react";
+import { Col, Row } from "antd";
 
-import {TimelineItem} from "../types/types";
+import {
+  EVENT_PRIORITY,
+  Timeline,
+  TimelineItem,
+  TimestampEvent,
+} from "../types/types";
 
-import FeedItem from "./FeedItem"
-import {roomTime, useTimeline} from "../lib/Connection";
-import {useUpdateAfterDelay} from "../util/hooks";
+import FeedItem from "./FeedItem";
+import connection, {
+  calculateRoomTime,
+  useRoomRunningAndReadyChanged,
+  useRoomTime,
+  useTimeline,
+} from "../lib/Connection";
+import { useResize, useUpdateAfterDelay } from "../util/hooks";
 import CSSTransition from "react-transition-group/CSSTransition";
 import TransitionGroup from "react-transition-group/TransitionGroup";
+import NextShot from "./NextShot";
+import ShotsTaken from "./ShotsTaken";
+import Player from "./Player";
 
-const Feed = (props: any) => {
+import "../css/feed.css";
+import FeedTicker from "./FeedTicker";
+
+declare global {
+  interface Window {
+    __feedShakeDebug?: boolean;
+  }
+}
+
+function getNextItemDelay(timeline: Timeline | null, defaultDelay = 500) {
+  if (!timeline) {
+    return defaultDelay;
+  }
+
+  const time = calculateRoomTime();
+  const nextItem = timeline.itemAfterTime(time);
+
+  if (!nextItem) {
+    return defaultDelay;
+  }
+
+  const speedFactor = connection.room.get()?.speedFactor || 1;
+  return (nextItem.timestamp * 1000 - time) / speedFactor;
+}
+
+/**
+ * This map relates back an event to the index of the item displayed from
+ * top to bottom. We can use this to calculate opacity.
+ */
+function calculateKeyToIndexMap(feed: TimelineItem[]) {
+  const keyToIndex: Map<string, number> = new Map();
+
+  let totalEvents = 0;
+  for (const item of feed) {
+    totalEvents += item.events.length;
+  }
+
+  let totalIdx = 0;
+  for (const item of feed) {
+    for (let eventIdx = 0; eventIdx < item.events.length; eventIdx++) {
+      keyToIndex.set(`${item.timestamp}.${eventIdx}`, totalEvents - ++totalIdx);
+    }
+  }
+
+  return keyToIndex;
+}
+
+/**
+ * Makes sure 'shot' is always top-most within an timeline item
+ */
+function sortEvents(events: TimestampEvent[]) {
+  return events.sort((a, b) => {
+    return EVENT_PRIORITY.indexOf(b.type) - EVENT_PRIORITY.indexOf(a.type);
+  });
+}
+
+const Feed = () => {
   const timeline = useTimeline();
+  useRoomRunningAndReadyChanged();
+  useResize();
+  useRoomTime();
 
-    useUpdateAfterDelay(500)
+  const feedElement = useRef<HTMLDivElement>(null);
+  const [lastShotId, setLastShotId] = useState<string | null>(null);
 
-    let liveFeed: TimelineItem[] = [];
+  useUpdateAfterDelay(getNextItemDelay(timeline));
 
-    if (timeline != null) {
-        liveFeed = timeline.feed.filter(item => {
-            return item.timestamp * 1000 <= roomTime()
+  if (!timeline) {
+    throw new TypeError("Feed without timeline.");
+  }
+
+  const time = calculateRoomTime();
+
+  const liveFeed = timeline.feed.filter((item) => {
+    return item.timestamp * 1000 <= time;
   });
+
+  const keyToIndex: Map<string, number> = calculateKeyToIndexMap(liveFeed);
+
+  const lastEvent = timeline.eventBeforeTime(time, "shot");
+  if (lastEvent && lastShotId !== lastEvent?.id) {
+    setLastShotId(lastEvent.id);
+
+    if (feedElement.current) {
+      // Let the browser first do the heavy dom stuff to avoid lagging our
+      // animation.
+      setTimeout(doSingleShake, 100);
+    }
+  }
+
+  function doSingleShake() {
+    if (!feedElement.current) return;
+
+    if (feedElement.current.getAnimations().length > 0) return;
+
+    if (feedElement.current.classList.contains("feed-shot-shake")) {
+      feedElement.current.getAnimations().forEach((i) => i.finish());
+      feedElement.current.classList.remove("feed-shot-shake");
+      setTimeout(doSingleShake, 0);
+      return;
+    }
+
+    feedElement.current.classList.add("feed-shot-shake");
+    const el = feedElement.current;
+    const listener = function () {
+      el.classList.remove("feed-shot-shake");
+      el.removeEventListener("animationend", listener);
+    };
+    el.addEventListener("animationend", listener);
+  }
+
+  function itemOpacity(itemKey: string) {
+    // This is a bit of a hack but works better than trying to do this in css.
+    // This fades out the elements the lower the element is on the screen.
+
+    // Ticker is only visible on large screens, the ticker obstructs some of
+    // the items. If it is not visible we simply take body height, otherwise
+    // we use the height where the ticker starts.
+    const tickerHeight = document
+      .querySelector(".ticker-container")
+      ?.getBoundingClientRect().y;
+    const bodyHeight = document.body.clientHeight;
+    const totalHeight = tickerHeight ? tickerHeight : bodyHeight;
+
+    // Start at top most item, figure out which index is the first
+    // that is NOT visible.
+    const items = document.querySelectorAll(".feed-item-container");
+    let i = items.length - 1;
+    for (; i > 0; i--) {
+      const rect = items[i].getBoundingClientRect();
+      // If the bottom of this element is below the screen, we declare it
+      // not-visible.
+      if (rect.y + rect.height >= totalHeight) {
+        break;
+      }
+    }
+    const totalItemsOnScreen = items.length - i;
+    const index = keyToIndex.get(itemKey) ?? 0;
+
+    let x = index / (totalItemsOnScreen - 1.8);
+    x = Math.min(0.9, Math.max(0, x));
+    return 1 - Math.pow(x, 4);
+  }
+
+  const debug = true;
+  if (debug) {
+    if (!window["__feedShakeDebug"]) {
+      window["__feedShakeDebug"] = true;
+      window.document.documentElement.addEventListener("keydown", (e) => {
+        if (e.keyCode === 67) {
+          // c
+          doSingleShake();
+        }
+      });
+    }
   }
 
   return (
-        <Col className="time-feed" span={24} md={16}>
+    <div className="feed" ref={feedElement}>
+      <Row className="feed-items">
+        <Col span={12} md={4} className="sider">
+          <NextShot />
+          <Player />
+        </Col>
+        <Col span={12} md={{ span: 4, push: 16 }} className="sider">
+          <ShotsTaken />
+        </Col>
+        <Col span={24} md={{ span: 16, pull: 4 }}>
           <TransitionGroup className="feed-reverse">
-                {liveFeed.map((item, i) =>
-                    item.events.map((event, j) =>
-                        <CSSTransition timeout={500} classNames="fade" key={`${item.timestamp}.${j}`}>
-                            <FeedItem item={event} key={`${item.timestamp}.${j}f`}/>
+            {liveFeed.map((item) =>
+              sortEvents(item.events).map((event, j) => (
+                <CSSTransition
+                  timeout={300}
+                  classNames="fade"
+                  key={`${item.timestamp}.${j}`}
+                >
+                  <div
+                    className="feed-item-container"
+                    style={{ opacity: itemOpacity(`${item.timestamp}.${j}`) }}
+                  >
+                    <FeedItem item={event} />
+                  </div>
                 </CSSTransition>
-                    )
+              ))
             )}
           </TransitionGroup>
         </Col>
+      </Row>
+      <Row className="ticker">
+        <FeedTicker />
+      </Row>
+    </div>
   );
 };
 

frontend/src/components/FeedItem.tsx

@@ -1,33 +1,38 @@
-import React, {PureComponent} from 'react';
+import { Col, Row } from "antd";
 
-import {TimestampEvent} from "../types/types";
+import type { TimestampEvent } from "../types/types";
 
-import '../css/feed.sass'
+import "../css/feed.css";
 import shot from "../img/shot.png";
 import song from "../img/song.png";
 import talk from "../img/talk.png";
 import time from "../img/time.png";
 
+export interface FeedItemProps {
+  item: TimestampEvent;
+}
+
 const images = {
-    shot, song, talk, time
+  shot,
+  song,
+  talk,
+  time,
 };
 
-class FeedItem extends PureComponent<{item: TimestampEvent}> {
-    render() {
+const FeedItem = ({ item }: FeedItemProps) => {
   return (
-            <div className="feed-item">
-                <div className="feed-item__title">
-                    {this.props.item.text[0]}
-                </div>
-                <div className="feed-item__emoji">
-                    <img src={images[this.props.item.type]}/>
-                </div>
-                <div className="feed-item__desc">
-                    {this.props.item.text[1]}
-                </div>
-            </div>
+    <Row align="middle" className="feed-item">
+      <Col span={11} className="feed-item__title">
+        {item.text[0]}
+      </Col>
+      <Col span={2} className="feed-item__emoji">
+        <img alt={item.type} src={images[item.type]} />
+      </Col>
+      <Col span={11} className="feed-item__desc">
+        {item.text[1]}
+      </Col>
+    </Row>
   );
-    }
-}
+};
 
 export default FeedItem;

frontend/src/components/FeedTicker.tsx

@@ -0,0 +1,95 @@
+import React, { MouseEvent, useRef, useState } from "react";
+
+import "../css/feed.css";
+import connection, { useRoom } from "../lib/Connection";
+import { Button, Input, Modal } from "antd";
+import Ticker from "react-ticker";
+
+const FeedTicker = (props: any) => {
+  const room = useRoom();
+
+  const [showTickerMessageModal, setShowTickerMessageModal] = useState(false);
+  const [tickerMessage, setTickerMessage] = useState("");
+  const [blockMessageInput, setBlockMessageInput] = useState(false);
+  const messageInput = useRef<Input>(null);
+  function handleTickerMessageButton(e: MouseEvent) {
+    if (blockMessageInput) return;
+    setShowTickerMessageModal(true);
+
+    setTimeout(function () {
+      messageInput.current?.focus();
+    }, 100);
+  }
+
+  function cancelTickerMessageModal() {
+    if (blockMessageInput) return;
+    setShowTickerMessageModal(false);
+    setTickerMessage("");
+  }
+
+  async function okTickerMessageModal() {
+    if (blockMessageInput) return;
+    if (tickerMessage) {
+      setBlockMessageInput(true);
+
+      try {
+        await connection.submitTickerMessage(tickerMessage);
+        setBlockMessageInput(false);
+        setShowTickerMessageModal(false);
+        setTickerMessage("");
+        if (messageInput.current) {
+          messageInput.current.input.value = "";
+        }
+      } catch {
+        setBlockMessageInput(false);
+      }
+    }
+  }
+
+  function getForIndex(index: number) {
+    return room?.ticker[index % room.ticker.length];
+  }
+
+  return (
+    <div className="ticker-container">
+      <Modal
+        title="Stuur berichtje naar de ticker"
+        onCancel={cancelTickerMessageModal}
+        onOk={okTickerMessageModal}
+        visible={showTickerMessageModal}
+      >
+        <Input
+          value={tickerMessage}
+          ref={messageInput}
+          placeholder="Bericht"
+          onChange={(e) => setTickerMessage(e.target.value)}
+          onKeyPress={(e) => {
+            e.key === "Enter" && okTickerMessageModal();
+          }}
+        />
+      </Modal>
+
+      <div className="ticker-outer">
+        <Ticker>
+          {({ index }) => (
+            <>
+              {room?.ticker && (
+                <span className="ticker-item">{getForIndex(index)}</span>
+              )}
+            </>
+          )}
+        </Ticker>
+
+        <Button
+          className="ticker-message-button"
+          type="ghost"
+          onClick={handleTickerMessageButton}
+        >
+          +
+        </Button>
+      </div>
+    </div>
+  );
+};
+
+export default FeedTicker;

frontend/src/components/Lobby.tsx

@@ -1,132 +1,206 @@
-import React, {MouseEvent, useState} from 'react';
-import {Button, Card, Col, Divider, Form, Input, InputNumber, Row, Select} from "antd"
-import {red} from '@ant-design/colors';
-
-import connection, {useConfig, useIsConnected, useRoom} from "../lib/Connection";
-
-import "../css/lobby.sass";
-import beer from "../img/beer.png"
-import {RoomOptions} from "../types/types";
-
-const {Option} = Select;
-
-const Lobby = (props: any) => {
+import { useState } from "react";
+import {
+  Button,
+  Card,
+  Col,
+  Divider,
+  Form,
+  Input,
+  InputNumber,
+  Row,
+  Select,
+  Badge,
+} from "antd";
+import { red } from "@ant-design/colors";
+
+import connection, {
+  useConfig,
+  useIsConnected,
+  useRoom,
+  useTimelineSongFileChanged,
+} from "../lib/Connection";
+
+import "../css/lobby.css";
+import logo from "../img/via-logo.svg";
+import haramlogo from "../img/harambee_logo.png";
+import beer from "../img/beer.png";
+import { RoomOptions } from "../types/types";
+
+const { Option } = Select;
+
+export interface PropType {
+  currentUserReady: boolean;
+  onCurrentUserReadyChange?: (ready: boolean) => void;
+}
+
+const Lobby = (props: PropType) => {
   // Form/control states.
   const [selectedRoomId, setSelectedRoomId] = useState(1);
   const [seekTime, setSeekTime] = useState(0);
   const [timelineName, setTimelineName] = useState(null);
   const [joiningLobby, setJoiningLobby] = useState(false);
   const [joinLobbyError, setJoinLobbyError] = useState(false);
+  const [isPreloading, setIsPreloading] = useState(false);
+  const timeline = useTimelineSongFileChanged();
 
   // Room and logic states.
   const isConnected = useIsConnected();
   const room = useRoom();
   const config = useConfig();
 
-    // @ts-ignore
-    const connectionType = connection.socket.io.engine.transport.name;
-
-    let isLeader = room?.isLeader || false;
-    let userCount = room?.userCount || 0;
-
-    function handleRequestStartClicked(e: MouseEvent) {
-        connection.requestStart(seekTime * 1000);
-    }
+  const isLeader = room?.isLeader || false;
+  const userCount = room?.userCount || 0;
 
-    function handleJoin(e: MouseEvent) {
-        connection.requestReady();
+  async function handleJoin() {
+    await preloadAudio();
+    connection.requestSetReady();
+    props.onCurrentUserReadyChange?.(true);
   }
 
-    function applyRoomId(v: number) {
-        connection.requestJoin(v).then(v => {
+  async function applyRoomId(v: number) {
+    setJoiningLobby(true);
+    await connection.requestJoin(v);
     setJoiningLobby(false);
     setJoinLobbyError(!v);
-        })
-        setJoiningLobby(true)
   }
 
   function handleJoinRandomLobby() {
-        connection.requestJoinRandom()
+    connection.requestJoinRandom();
     setJoinLobbyError(false);
   }
 
   function handleTimelineNameSet(timelineName: any) {
     setTimelineName(timelineName);
-        connection.setRoomOptions(new RoomOptions(
-            seekTime || 0,
-            timelineName || room?.timelineName || ''))
+    connection.setRoomOptions(
+      new RoomOptions(
+        seekTime * 1000 || 0,
+        timelineName || room?.timelineName || ""
+      )
+    );
   }
 
   function handleSetSeekTime(seekTime: number) {
     setSeekTime(seekTime);
-        connection.setRoomOptions(new RoomOptions(
+    connection.setRoomOptions(
+      new RoomOptions(
         seekTime * 1000 || 0,
-            timelineName || room?.timelineName || ''))
+        timelineName || room?.timelineName || ""
+      )
+    );
+  }
+
+  function preloadAudio(): Promise<boolean> {
+    setIsPreloading(true);
+    const songFile = timeline?.songFile;
+
+    if (!songFile) {
+      return Promise.resolve(false);
+    }
+
+    return new Promise<boolean>((resolve) => {
+      const audioElement = new Audio();
+      audioElement.addEventListener("canplaythrough", () => {
+        // 'canplaythrough' means the browser thinks it has buffered enough to play
+        // until the end.
+        setIsPreloading(false);
+        resolve(true);
+      });
+      audioElement.src = songFile;
+    });
   }
 
-    let leaderConfig = (
+  const leaderConfig = (
     <Row justify="center">
       <Col>
         <Form
-                    layout='horizontal'
-                    labelCol={{span: 8}}
-                    wrapperCol={{span: 24}}
+          layout="horizontal"
+          labelCol={{ span: 8 }}
+          wrapperCol={{ span: 24 }}
         >
           <Form.Item label="Starttijd">
             <Input
               type="number"
               suffix="sec"
               value={seekTime}
-                            onChange={v => handleSetSeekTime(parseInt(v.target.value) || 0)}/>
+              onChange={(v) => handleSetSeekTime(parseInt(v.target.value) || 0)}
+            />
           </Form.Item>
 
           <Form.Item label="Nummer">
-                        <Select defaultValue={(room && room.timelineName) || ''}
-                                onChange={e => handleTimelineNameSet(e)}>
-                            {config && config.availableTimelines.map((item, i) =>
-                                <Option key={item} value={item}>{item}</Option>
-                            )}
+            <Select
+              defaultValue={(room && room.timelineName) || ""}
+              onChange={(e) => handleTimelineNameSet(e)}
+            >
+              {config &&
+                config.availableTimelines.map((item, i) => (
+                  <Option key={item} value={item}>
+                    {item}
+                  </Option>
+                ))}
             </Select>
           </Form.Item>
-
         </Form>
 
         <Button
           block
           type="primary"
-                    onClick={handleRequestStartClicked}>Start</Button>
+          loading={isPreloading}
+          onClick={handleJoin}
+        >
+          Start
+        </Button>
       </Col>
     </Row>
-    )
+  );
 
-    let nonLeaderConfig = (
+  const nonLeaderConfig = (
     <Row justify="center">
       <Col>
         <p>
-                    We gaan luisteren naar <b>{room && room.timelineName}</b> en
+          {room?.running ? "We luisteren naar" : "We gaan luisteren naar"}{" "}
+          <b>{room && room.timelineName}</b> en
           {room?.running && <span> zijn al gestart!</span>}
-                    {!room?.running && <span> starten op {(room?.seekTime || 0) / 1000} seconden</span>}
+          {!room?.running && (
+            <span> starten op {(room?.seekTime || 0) / 1000} seconden</span>
+          )}
         </p>
 
         <Button
           block
           type="primary"
-                    disabled={!room || room.readyToParticipate}
-                    onClick={handleJoin}>{room && room.readyToParticipate ? 'Wachten op het startsein' : 'Kom erbij'}</Button>
+          disabled={!room || props.currentUserReady}
+          loading={isPreloading}
+          onClick={handleJoin}
+        >
+          {room && props.currentUserReady
+            ? "Wachten op het startsein"
+            : "Kom erbij"}
+        </Button>
       </Col>
     </Row>
-    )
+  );
 
-    // @ts-ignore
   return (
     <div className="lobby">
-            <Row>
-                <Col className="centurion-title" span={24}>
-                    <div className="beer-flipped">
-                        <img src={beer} className={`beer ${isConnected ? 'connected' : 'connecting'}`} alt="beer"/>
-                    </div>
-                    <span className="text">Centurion!</span>
-                    <img src={beer} className={`beer ${isConnected ? 'connected' : 'connecting'}`} alt="beer"/>
+      <Row className="centurion-title" justify="center">
+        <Col span={4} md={4}>
+          <img
+            src={beer}
+            className={`beer beer-flipped ${
+              isConnected ? "connected" : "connecting"
+            }`}
+            alt="beer"
+          />
+        </Col>
+        <Col span={12} md={6}>
+          Centurion!
+        </Col>
+        <Col span={4} md={4}>
+          <img
+            src={beer}
+            className={`beer ${isConnected ? "connected" : "connecting"}`}
+            alt="beer"
+          />
         </Col>
       </Row>
       <Row>
@@ -136,82 +210,102 @@ const Lobby = (props: any) => {
           <div>Kun jij het aan?</div>
         </Col>
       </Row>
-            <br/>
+      <br />
 
-            {!isConnected &&
+      {!isConnected && (
         <Row justify="center">
           <Col className="lobby-connecting">
             <h2>Verbinden...</h2>
           </Col>
         </Row>
-            }
+      )}
 
-            {isConnected &&
+      {isConnected && (
         <Row justify="center">
-                <Col xs={24} sm={16} md={12} xl={10} className="lobby-info">
+          <Col xs={24} sm={16} md={12} xl={10}>
             <Card>
-                        <h3>Huidige lobby: <b>{room?.id || 'Geen lobby'}</b></h3>
+              <h3>
+                Huidige lobby: <b>{room ? `#${room.id}` : "Geen lobby"}</b>
+              </h3>
 
-                        {/*<span>Verbonden met {connectionType}</span>*/}
+              {room && (
+                <Row>
+                  {userCount === 1 ? (
+                    <span>Er is één gebruiker aanwezig.</span>
+                  ) : (
+                    <span>Er zijn {userCount} gebruikers aanwezig.</span>
+                  )}
+                </Row>
+              )}
 
-                        {room &&
-                        <span>
-                            {userCount === 1 ?
-                                <p>Er is één gebruiker aanwezig.</p>
-                                :
-                                <p>Er zijn {userCount} gebruikers aanwezig.</p>
-                            }
-                        </span>
-                        }
-                        {room &&
-                        <span>Deel de link met je vrienden om mee te doen!</span>
-                        }
-                        <br/>
-                        <br/>
+              <Row justify="center">
+                {room?.users?.map((u) => (
+                  <Badge
+                    key={u.id}
+                    status={u.readyToParticipate ? "success" : "error"}
+                  />
+                ))}
+              </Row>
+
+              {room && <Row>Deel de link met je vrienden om mee te doen!</Row>}
+
+              <Divider />
 
               {room && (isLeader ? leaderConfig : nonLeaderConfig)}
 
-                        <Divider/>
+              <Divider />
 
               <Row justify="center">
                 <Col>
                   <InputNumber
-                                    style={{'width': 'calc(100% - 150px)'}}
+                    style={{ width: "calc(100% - 150px)" }}
                     min={1}
                     max={100000}
                     value={selectedRoomId || room?.id || 0}
-                                    onChange={(v) => setSelectedRoomId(v || 0)}/>
+                    onChange={(v) => setSelectedRoomId(v || 0)}
+                  />
 
                   <Button
-                                    style={{'width': '150px'}}
+                    style={{ width: "150px" }}
                     type="primary"
                     loading={joiningLobby}
-                                    onClick={() => {
-                                        applyRoomId(selectedRoomId)
-                                    }}>Verander van lobby</Button>
+                    onClick={async () => {
+                      await applyRoomId(selectedRoomId);
+                    }}
+                  >
+                    Ga naar die lobby
+                  </Button>
 
-                                {joinLobbyError &&
-                                <span style={{color: red[4]}}>Die lobby bestaat niet</span>
-                                }
+                  {joinLobbyError && (
+                    <span style={{ color: red[4] }}>
+                      Die lobby bestaat niet
+                    </span>
+                  )}
                 </Col>
               </Row>
 
               <Row justify="center">
-                            <span className={'lobby-options-or'}>of</span>
+                <span className={"lobby-options-or"}>of</span>
               </Row>
 
               <Row justify="center">
                 <Col>
-                                <Button type="primary"
+                  <Button
+                    type="primary"
                     onClick={() => {
-                                            handleJoinRandomLobby()
-                                        }}>Join een willekeurige lobby</Button>
+                      handleJoinRandomLobby();
+                    }}
+                  >
+                    Join een nieuwe lobby
+                  </Button>
                 </Col>
               </Row>
             </Card>
           </Col>
         </Row>
-            }
+      )}
+      <img src={haramlogo} className="haram-logo" alt="haramlogo"/>
+      <img src={logo} className="via-logo" alt="logo" />
     </div>
   );
 };

frontend/src/components/NextShot.tsx

@@ -1,41 +1,47 @@
-import React from 'react';
-import {Col, Progress} from "antd"
-import {roomTime, useTimeline} from "../lib/Connection";
-import {useUpdateAfterDelay} from "../util/hooks";
-
+import { Progress } from "antd";
+import { calculateRoomTime, useTimeline } from "../lib/Connection";
+import { useUpdateAfterDelay } from "../util/hooks";
 
 const NextShot = () => {
-    const timeline = useTimeline()
+  const timeline = useTimeline();
+
+  useUpdateAfterDelay(1000);
 
-    useUpdateAfterDelay(1000)
+  if (!timeline) {
+    throw new TypeError("NextShot without timeline");
+  }
 
   let remainingTime = 0;
   let remainingPercentage = 0;
 
-    if (timeline) {
-        const time = roomTime();
-        const [current, next] = timeline.itemAtTime(time, 'shot');
+  const currentRoomTime = calculateRoomTime();
 
-        if (current && next) {
-            let currentTime = time - current.timestamp * 1000
-            let nextTime = next.timestamp * 1000 - current.timestamp * 1000;
+  const nextItem = timeline.itemAfterTime(currentRoomTime, "shot");
 
-            remainingTime = Math.round((nextTime - currentTime) / 1000)
-            remainingPercentage = 100 - (currentTime / (nextTime || 1)) * 100;
-        }
+  if (nextItem) {
+    const prevShotRoomTime =
+      (timeline.itemBeforeTime(currentRoomTime, "shot")?.timestamp || 0) * 1000;
+    const nextShotRoomTime = nextItem?.timestamp * 1000;
+    const totalRoomTimeBetweenShots = nextShotRoomTime - prevShotRoomTime;
+    const roomTimeSinceLastShot = currentRoomTime - prevShotRoomTime;
+
+    remainingTime = Math.round((nextShotRoomTime - currentRoomTime) / 1000);
+    remainingPercentage =
+      100 - (roomTimeSinceLastShot / totalRoomTimeBetweenShots) * 100;
   }
 
   return (
-        <Col className="sider" span={24} md={4}>
+    <>
       <h1>Tijd tot volgende shot:</h1>
-            <Progress type="circle"
+      <Progress
+        type="circle"
         percent={remainingPercentage}
-                      format={_ => remainingTime + ' sec.'}
+        format={() => `${remainingTime} sec.`}
         strokeColor={"#304ba3"}
         strokeWidth={10}
-                      status="normal"/>
-        </Col>
-
+        status="normal"
+      />
+    </>
   );
 };
 

frontend/src/components/Player.tsx

@@ -1,106 +1,211 @@
-import {roomTime, useRoomRunningAndReadyChanged, useRoomTime, useTimelineSongFileChanged} from "../lib/Connection";
-import React, {createRef, SyntheticEvent, useRef, useState} from "react";
+import connection, {
+  calculateRoomTime,
+  useRoomRunningAndReadyChanged,
+  useTimelineSongFileChanged,
+} from "../lib/Connection";
+import { SyntheticEvent, useEffect, useRef, useState } from "react";
 
-import '../css/player.sass'
-import {Room} from "../types/types";
-import {parse as parseQueryString} from "query-string";
+import { Button, Slider } from "antd";
+import { SoundFilled, SoundOutlined } from "@ant-design/icons";
+
+import "../css/player.css";
+import { Room } from "../types/types";
 
 const Player = () => {
   const room = useRoomRunningAndReadyChanged();
-    const _ = useRoomTime()
   const timeline = useTimelineSongFileChanged();
 
-    let player = useRef<HTMLAudioElement>(null)
+  const player = useRef<HTMLAudioElement>(null);
+  const defaultVolume = parseInt(localStorage.getItem("volume") ?? "100");
+
+  const [volume, setVolume] = useState(defaultVolume);
+  const [muted, setMuted] = useState(false);
+  const [finishedLoading, setFinishedLoading] = useState(false);
 
   const [timesSeeked, setTimesSeeked] = useState(0);
   const [hadError, setHadError] = useState(false);
 
   // If our time synchronisation algorithm thing thinks the time is off by more
   // than this value, we seek the running player to correct it.
-    const diffSecondsRequiredToSeekRunningPlayer = 0.20;
+  const diffSecondsRequiredToSeekRunningPlayer = 0.2;
 
   // Hard cap we are allowed to seek this player. Some browsers are slow or inaccurate
   // and will always be off. To avoid endless skipping of the song this cap stops seeking the
   // player.
   const maxTimesSeekAllow = 25;
 
-    const query = parseQueryString(window.location.search);
-    if (query.nosound) {
-        return null;
+  useEffect(() => {
+    // Need to use an effect since 'player' will only contain a reference after first render.
+
+    if (!timeline) {
+      throw new Error("Player without active timeline.");
     }
 
-    if (player.current && player.current.dataset.src != timeline!!.songFile) {
-        player.current.dataset.src = timeline!!.songFile;
-        player.current.src = timeline!!.songFile;
+    if (!player.current) {
+      throw new Error("No player after mount.");
     }
 
+    player.current.src = timeline.songFile;
+  }, [timeline]);
+
   function handlePlayerOnPlay(e: SyntheticEvent) {
     e.preventDefault();
-
     // For when the user manually started the player for when autoplay is off.
     setHadError(false);
-        if (shouldPlay()) {
-            startPlaying(true)
+  }
+
+  async function handlePlayerPause(e: SyntheticEvent) {
+    if (!shouldPlay()) {
+      // We should not be playing, pausing is fine.
+      console.log("should not play, paused");
+      return;
+    }
+
+    e.preventDefault();
+
+    if (room) {
+      setPlayerTime(room, true);
+    }
+    await player.current?.play();
+  }
+
+  function handlePlayerCanPlayThrough() {
+    if (!finishedLoading) {
+      setFinishedLoading(true);
+      connection.requestStart();
     }
   }
 
   function shouldPlay() {
-        return player.current && timeline && room && room.running && room.readyToParticipate
+    return (
+      player.current &&
+      timeline &&
+      room &&
+      room.running &&
+      room.readyToParticipate &&
+      !player.current.ended
+    );
   }
 
-    function startPlaying(manual: boolean) {
-        if (!player.current) return;
+  async function startPlaying(manual: boolean) {
+    if (!player.current) {
+      return;
+    }
 
     if (player.current.paused && !hadError) {
-            player.current.play().then(() => {
+      setPlayerVolume(volume);
+
+      try {
+        await player.current.play();
         setHadError(false);
-            }).catch(e => {
-                console.error('Error playing', e);
+      } catch (e) {
+        console.error("Error playing", e);
         setHadError(true);
-            })
+      }
     }
 
-        if (!hadError) {
-            setPlayerTime(room!!, manual);
+    if (!hadError && room) {
+      setPlayerTime(room, manual);
     }
   }
 
   function setPlayerTime(room: Room, manualAdjustment: boolean) {
-        if (!player.current) return;
+    if (!player.current) {
+      return;
+    }
+
+    // Player's currentTime is in seconds, not ms.
+    const targetTime = calculateRoomTime() / 1000;
+    const diff = Math.abs(player.current.currentTime - targetTime);
+
+    // console.log('PLAYER DIFF', diff,
+    //     'min req to seek: ', diffSecondsRequiredToSeekRunningPlayer,
+    //     `(${timesSeeked} / ${maxTimesSeekAllow})`);
+
+    if (diff <= diffSecondsRequiredToSeekRunningPlayer) {
+      return;
+    }
 
-        let targetTime = roomTime() / 1000;
-        let diff = player.current.currentTime - targetTime;
+    if (timesSeeked >= maxTimesSeekAllow && !manualAdjustment) {
+      // If we are adjusting manually we always allow a seek.
+      console.warn(
+        "The running player is off, but we've changed the time " +
+          "too often, skipping synchronizing the player."
+      );
+      return;
+    }
 
-        if (player.current && Math.abs(diff) > diffSecondsRequiredToSeekRunningPlayer) {
-            if (room.speedFactor != 1 || manualAdjustment || timesSeeked < maxTimesSeekAllow) {
     player.current.currentTime = targetTime;
-                player.current.playbackRate = Math.max(Math.min(4.0, room.speedFactor), 0.25);
+    player.current.playbackRate = Math.min(room.speedFactor, 5);
 
     if (!manualAdjustment) {
       setTimesSeeked(timesSeeked + 1);
     }
-            } else {
-                console.warn('The running player is off, but we\'ve changed the time ' +
-                    'too often, skipping synchronizing the player.');
+
+    console.log(
+      `Player seeked: diff: ${diff}, target: ${targetTime}, (${timesSeeked} / ${maxTimesSeekAllow})`
+    );
   }
+
+  function toggleMute() {
+    if (player.current != null) {
+      player.current.muted = !player.current.muted;
+      setMuted(!muted);
+    }
+  }
+
+  function changeVolume(sliderValue: number) {
+    setVolume(sliderValue);
+    localStorage["volume"] = sliderValue;
+    setPlayerVolume(sliderValue);
+  }
+
+  function setPlayerVolume(value: number) {
+    if (player.current) {
+      player.current.volume =
+        value === 0.0 ? 0.0 : Math.pow(10, (value / 100 - 1) * 2);
     }
   }
 
   if (shouldPlay()) {
     startPlaying(false)
+      .then(() => {
+        //
+      })
+      .catch((e) => {
+        console.error(e);
+      });
   } else {
     if (player.current) {
       player.current.pause();
     }
   }
 
-    function render() {
   return (
-            <audio ref={player} className='player' hidden={!hadError} controls={true} onPlay={handlePlayerOnPlay}/>
-        )
-    }
-
-    return render();
-}
+    <div id="audio">
+      <audio
+        ref={player}
+        className="player"
+        controls={true}
+        loop={false}
+        hidden={!hadError}
+        onPause={handlePlayerPause}
+        onPlay={handlePlayerOnPlay}
+        onCanPlayThrough={handlePlayerCanPlayThrough}
+      />
+      <div id="volume-control">
+        <Button onClick={toggleMute} shape="circle">
+          {muted ? <SoundOutlined /> : <SoundFilled />}
+        </Button>
+        <Slider
+          id="volume-slider"
+          defaultValue={volume}
+          onChange={changeVolume}
+          trackStyle={{ backgroundColor: "var(--secondary-color)" }}
+        />
+      </div>
+    </div>
+  );
+};
 
 export default Player;

frontend/src/components/ShotsTaken.tsx

@@ -1,33 +1,40 @@
-import React from 'react';
-import {Col, Progress} from "antd"
-import {roomTime, useTimeline} from "../lib/Connection";
-import {useUpdateAfterDelay} from "../util/hooks";
-
+import { Progress } from "antd";
+import { calculateRoomTime, useTimeline } from "../lib/Connection";
+import { useUpdateAfterDelay } from "../util/hooks";
 
 const ShotsTaken = () => {
-    let timeline = useTimeline();
-
+  const timeline = useTimeline();
   useUpdateAfterDelay(1000);
 
+  if (!timeline) {
+    throw new TypeError("ShotsTaken without timeline");
+  }
+  const totalShots = timeline.getTotalShotCount();
+
   let taken = 0;
 
-    if (timeline) {
-        let [current, _] = timeline.eventAtTime(roomTime(), 'shot');
-        if (current) {
-            taken = current.shotCount!!;
-        }
+  const time = calculateRoomTime();
+  const prevShot = timeline.eventBeforeTime(time, "shot");
+
+  if (prevShot) {
+    taken = prevShot.shotCount;
+  } else {
+    const nextShot = timeline.eventAfterTime(time, "shot");
+    taken = nextShot ? nextShot.shotCount - 1 : taken;
   }
 
   return (
-        <Col className="sider" span={24} md={4}>
+    <>
       <h1>Shots genomen:</h1>
-            <Progress type="circle"
-                      percent={taken}
-                      format={_ => taken + ' / 100'}
+      <Progress
+        type="circle"
+        percent={(taken / totalShots) * 100}
+        format={() => `${taken} / ${totalShots}`}
         status="normal"
         strokeColor={"#304ba3"}
-                      strokeWidth={10}/>
-        </Col>
+        strokeWidth={10}
+      />
+    </>
   );
 };
 

frontend/src/css/feed.css

@@ -0,0 +1,133 @@
+.feed {
+  #audio {
+    padding-top: 15px;
+    padding-bottom: 15px;
+    padding: 15px auto;
+  }
+
+  &.feed-shot-shake {
+    animation: shake-out 0.5s ease-out;
+  }
+
+  @keyframes shake-out {
+    0%,
+    20% {
+      transform: translate3d(-4px, 0, 0);
+    }
+    10%,
+    30% {
+      transform: translate3d(4px, 0, 0);
+    }
+    40% {
+      transform: translate3d(-3px, 0, 0);
+    }
+    50% {
+      transform: translate3d(3px, 0, 0);
+    }
+    60% {
+      transform: translate3d(-2px, 0, 0);
+    }
+    70% {
+      transform: translate3d(2px, 0, 0);
+    }
+    80% {
+      transform: translate3d(-1px, 0, 0);
+    }
+    90% {
+      transform: translate3d(1px, 0, 0);
+    }
+    100% {
+      transform: translate3d(0px, 0, 0);
+    }
+  }
+
+  .fade-enter {
+    opacity: 1;
+    transform: translateY(-30%);
+  }
+
+  .fade-enter-active {
+    transition: opacity 0.3s ease-out, transform 0.3s ease-out;
+    opacity: 1;
+    transform: translateY(0);
+  }
+
+  .fade-leave {
+    opacity: 1;
+  }
+
+  .fade-leave.fade-leave-active {
+    transition: opacity 0.3s ease-out;
+    opacity: 0;
+  }
+  
+}
+
+.feed-reverse {
+  display: flex;
+  flex-direction: column-reverse;
+}
+
+.feed-item {
+  border: 1px solid #efefef;
+  border-radius: 2px;
+  padding: 0.35em;
+  margin: 0.25em;
+  text-align: center;
+  font-size: 1.1rem;
+  font-weight: bold;
+  color: rgba(0, 0, 0, 0.85);
+  box-shadow: 0 0 10px -4px rgba(48, 75, 163, 0.2);
+
+  @media (min-width: 992px) {
+    font-size: 1.5rem;
+  }
+}
+
+.feed-item__emoji > img {
+  max-width: 100%;
+  max-height: 40px;
+}
+
+:root {
+  --ticker-height: 3em;
+  --feed-height: calc(100% - var(--ticker-height));
+}
+
+.feed-items {
+  overflow: hidden;
+
+  @media (min-width: 992px) {
+    height: var(--feed-height);
+    padding-bottom: var(--ticker-height);
+  }
+}
+
+.ticker-container {
+  display: none;
+  width: 100%;
+  height: var(--ticker-height);
+  overflow: hidden;
+
+  @media (min-width: 992px) {
+    display: block;
+  }
+
+  .ticker-outer {
+    width: 100%;
+    height: 100%;
+    position: relative;
+  }
+
+  .ticker-message-button {
+    position: absolute;
+    left: 0;
+    bottom: 0;
+    background: white;
+  }
+
+  .ticker-item {
+    font-size: 2em;
+    margin-right: 2em;
+  }
+}

frontend/src/css/feed.sass

@@ -1,49 +0,0 @@
-.feed-item
-  display: flex
-  border: 1px solid #efefef
-  border-radius: 4px
-  padding: 10px
-  margin: 10px
-  text-align: center
-  font-size: 16pt
-  font-weight: bold
-  color: rgba(0, 0, 0, 0.85)
-  box-shadow: 0 0 10px -4px rgba(48, 75, 163, 0.2)
-
-.feed-item__title
-  width: 45%
-
-.feed-item__desc
-  width: 45%
-
-.feed-item__emoji
-  width: 10%
-
-  img
-    width: 60%
-    max-width: 100%
-    max-height: 100%
-
-.feed-reverse
-  display: flex
-  flex-direction: column-reverse
-
-
-// Animations
-.fade-enter
-  opacity: 0.01
-  max-height: 0
-
-.fade-enter.fade-enter-active
-  opacity: 1
-  max-height: 1000px
-  transition: opacity 500ms ease-in, max-height 500ms ease-in
-
-.fade-leave
-  opacity: 1
-  max-height: 1000px
-
-.fade-leave.fade-leave-active
-  opacity: 0.01
-  max-height: 0
-  transition: opacity 300ms ease-in, max-height 300ms ease-in

frontend/src/css/index.css

@@ -0,0 +1,59 @@
+@import 'antd/es/style/index';
+  
+@font-face {
+  font-family: 'SourceSansPro';
+  src: local('SourceSansPro'), url('./SourceSansPro.otf') format('opentype');
+}
+
+:root {
+  --primary-color: #304ba3;
+  --secondary-color: #ae2573;
+}
+
+body {
+  font-family: "SourceSansPro", sans-serif !important;
+  background-color: white;
+}
+
+#root {
+  height: 100%;
+}
+
+.feed {
+  height: 100%;
+  overflow: hidden;
+  padding: 0.5em;
+}
+
+.content {
+  padding: 1rem;
+  height: 100%;
+}
+
+.via-logo {
+  z-index: -10000;
+  position: fixed;
+  right: 0;
+  bottom: 0;
+  width: auto;
+  height: 5em;
+  padding: 10px;
+}
+
+.haram-logo {
+  z-index: -10000
+  position: fixed;
+  left: 0;
+  bottom: 0;
+  width: auto;
+  height: 10em;
+  padding: 10px;
+}
+
+.sider {
+  text-align: center;
+}
+
+h1 {
+  min-height: 3em;
+}

frontend/src/css/index.sass

@@ -1,57 +0,0 @@
-@import '~antd/dist/antd.css'
-
-@font-face
-  font-family: 'SourceSansPro'
-  src: local('SourceSansPro'), url('./SourceSansPro.otf') format('opentype')
-
-
-$footer-height: 4.5em
-$content-height: calc(100vh - #{$footer-height})
-
-body
-  font-family: 'SourceSansPro', sans-serif
-  background-color: white
-
-
-.feed
-  max-height: $content-height
-  overflow: hidden
-  padding: 0.5em
-
-
-.content
-  padding: 1rem
-  height: $content-height
-
-
-.via-logo
-  z-index: -10000
-  position: fixed
-  right: 0
-  bottom: 0
-  width: auto
-  height: 5em
-  padding: 10px
-
-
-.haram-logo
-  z-index: -10000
-  position: fixed
-  left: 0
-  bottom: 0
-  width: auto
-  height: 10em
-  padding: 10px
-
-
-.sider
-  text-align: center
-
-
-h1
-  min-height: 3em
-
-
-footer
-  padding: 0.25em 0.5em
-  height: 4.5em

frontend/src/css/lobby.css

@@ -0,0 +1,76 @@
+.lobby {
+  .centurion-title {
+    text-align: center;
+
+    font-size: 2.5rem;
+    min-height: inherit;
+
+    .text {
+      padding: 0 2rem;
+    }
+
+    .beer {
+      animation-fill-mode: forwards;
+      max-width: 120%;
+      max-height: 120%;
+
+      &.connecting {
+        animation: spin 0.4s ease-in-out 25;
+      }
+
+      @keyframes spin {
+        100% {
+          transform: rotate(-360deg);
+        }
+      }
+    }
+  }
+
+  .beer-flipped {
+    transform: scaleX(-1);
+  }
+
+  .lobby-connecting {
+    margin: 2em 0 0 0;
+    text-align: center;
+  }
+
+  .hints {
+    margin: 1rem 0 0 0;
+    font-size: 1.5rem;
+    text-align: center;
+  }
+
+  .control {
+    font-size: 1.3rem;
+    margin: 2em 1em 2em 1em;
+    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.12), 0 1px 2px rgba(0, 0, 0, 0.24);
+  }
+
+  .lobby-options-or {
+    display: inline-block;
+    position: relative;
+
+    margin: 16px 0;
+    color: #888;
+
+    &:before,
+    &:after {
+      content: "";
+      width: 1px;
+      height: 6px;
+      position: absolute;
+      left: 50%;
+      margin-left: 0.1px;
+      background: #bbb;
+    }
+
+    &:before {
+      bottom: 100%;
+    }
+
+    &:after {
+      top: 100%;
+    }
+  }
+}

frontend/src/css/lobby.sass

@@ -1,62 +0,0 @@
-.lobby
-  .centurion-title
-    text-align: center
-
-    font-size: 2.5rem
-    min-height: inherit
-
-    .text
-      padding: 0 2rem
-
-    .beer
-      animation-fill-mode: forwards
-
-      &.connecting
-        animation: spin 0.4s ease-in-out 25
-
-      @keyframes spin
-        100%
-          transform: rotate(-360deg)
-
-    .beer-flipped
-      transform: scaleX(-1)
-      display: inline-block
-
-  .lobby-connecting
-    margin: 2em 0 0 0
-    text-align: center
-
-  .hints
-    margin: 1rem 0 0 0
-    font-size: 1.5rem
-    text-align: center
-
-  .lobby-info
-    text-align: center
-
-  .control
-    font-size: 1.3rem
-    margin: 2em 1em 2em 1em
-    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.12), 0 1px 2px rgba(0, 0, 0, 0.24)
-
-  .lobby-options-or
-    display: inline-block
-    position: relative
-
-    margin: 16px 0
-    color: #888
-
-    &:before, &:after
-      content: ''
-      width: 1px
-      height: 6px
-      position: absolute
-      left: 50%
-      margin-left: 0.1px
-      background: #bbb
-
-    &:before
-      bottom: 100%
-
-    &:after
-      top: 100%

frontend/src/css/player.css

@@ -0,0 +1,16 @@
+#volume-control {
+  display: flex;
+  flex-direction: row;
+  justify-content: center;
+}
+
+#volume-control .ant-slider {
+  width: 65%;
+  padding-left: 10px;
+}
+
+.player {
+  position: fixed;
+  left: 0;
+  bottom: 0;
+}

frontend/src/css/player.sass

@@ -1,4 +0,0 @@
-.player
-  position: fixed
-  left: 0
-  bottom: 0

frontend/src/index.tsx

@@ -1,7 +1,6 @@
-import React from 'react';
-import ReactDOM from 'react-dom';
-import './css/index.sass';
+import ReactDOM from "react-dom";
+import "./css/index.css";
 
-import App from './components/App';
+import Centurion from "./components/Centurion";
 
-ReactDOM.render(<App/>, document.getElementById('root'));
+ReactDOM.render(<Centurion />, document.getElementById("root"));

frontend/src/lib/Connection.ts

@@ -1,14 +1,12 @@
-import io from "socket.io-client";
-import {useEffect, useState} from "react";
-import {parse as parseQueryString, stringify as stringifyQueryString} from 'query-string';
+import io, { Socket } from "socket.io-client";
 
-import {Config, Room, RoomOptions, Timeline} from "../types/types";
-import {Sub, useSub} from "../util/sub";
+import { Config, Room, RoomOptions, Timeline } from "../types/types";
+import { Sub, useSub } from "../util/sub";
 
 class Connection {
-    url = '/';
+  url = "/";
 
-    socket: SocketIOClient.Socket;
+  socket: Socket;
 
   isConnected = new Sub<boolean>();
 
@@ -22,14 +20,12 @@ class Connection {
   timeSyncTooOld = 120000;
   roomTime = new Sub<number>();
 
-    calls: { [id: number]: Call } = {};
-
   constructor() {
     this.isConnected.set(false);
 
     this.socket = io(this.url, {
       autoConnect: false,
-            transports: ['websocket']
+      transports: ["websocket"],
     });
 
     this.setupSocketListeners();
@@ -44,25 +40,25 @@ class Connection {
   }
 
   setupSocketListeners() {
-        this.socket.on('connect', () => {
+    this.socket.on("connect", async () => {
       this.isConnected.set(true);
-            this.onConnect();
-        })
+      await this.onConnect();
+    });
 
-        this.socket.on('disconnect', () => {
+    this.socket.on("disconnect", () => {
       this.isConnected.set(false);
       this.onDisconnect();
-        })
+    });
 
-        this.socket.on('config', (data: any) => {
+    this.socket.on("config", (data: any) => {
       this.config.set(data.config);
-        })
+    });
 
-        this.socket.on('time_sync', (data: any) => {
+    this.socket.on("time_sync", (data: any) => {
       this.timeSyncResponse(data.requestId, data.clientDiff, data.serverTime);
-        })
+    });
 
-        this.socket.on('room', (data: any) => {
+    this.socket.on("room", (data: any) => {
       if (data.room) {
         this.setQueryLobbyId(data.room.id);
       }
@@ -70,38 +66,25 @@ class Connection {
       this.room.set(data.room);
     });
 
-        this.socket.on('timeline', (data: any) => {
+    this.socket.on("timeline", (data: any) => {
       if (data.timeline) {
         this.timeline.set(new Timeline(data.timeline));
       } else {
         this.timeline.set(null);
       }
     });
-
-        this.socket.on('call_response', (data: any) => {
-            let call = this.calls[data.id];
-            if (!call) return;
-
-            if (data.error) {
-                call.callback(data.error, null);
-            } else {
-                call.callback(null, data.response);
-            }
-            delete this.calls[data.id];
-        });
   }
 
-    onConnect() {
+  async onConnect() {
     this.startTimeSync();
 
-        let lobbyId = this.getQueryLobbyId();
+    const lobbyId = this.getQueryLobbyId();
     if (lobbyId) {
-            this.requestJoin(lobbyId).then(v => {
-                if (!v) {
-                    this.setQueryLobbyId(null);
+      const exists = await this.requestJoin(lobbyId);
+      if (!exists) {
+        this.setQueryLobbyId();
         this.requestJoinRandom();
       }
-            })
     } else {
       this.requestJoinRandom();
     }
@@ -111,88 +94,91 @@ class Connection {
     this.stopTimeSync();
   }
 
-    autoStart() : boolean {
-        let query = parseQueryString(window.location.search);
-        return !!query.autostart;
-    }
-
   private getQueryLobbyId(): number | null {
-        let query = parseQueryString(window.location.search);
-        if (query.lobby) {
-            let lobbyId = Number.parseInt(query.lobby.toString());
-            if (Number.isSafeInteger(lobbyId) && lobbyId > 0) {
-                return lobbyId
-            }
+    const query = new URLSearchParams(window.location.search);
+    const lobby = query.get("lobby");
+
+    if (!lobby) {
+      return null;
     }
+
+    const lobbyId = Number.parseInt(query.get("lobby")!.toString());
+
+    if (!Number.isSafeInteger(lobbyId) || lobbyId < 1) {
       return null;
     }
 
-    private setQueryLobbyId(lobbyId: number | null) {
-        let query = parseQueryString(window.location.search);
+    return lobbyId;
+  }
+
+  private setQueryLobbyId(lobbyId?: number) {
+    const newUrl = new URL(window.location.href);
+
     if (lobbyId) {
-            query.lobby = lobbyId.toString();
+      newUrl.searchParams.set("lobby", String(lobbyId));
     } else {
-            delete query.lobby;
-        }
-        let newUrl = window.location.protocol + "//" + window.location.host +
-            window.location.pathname + (Object.keys(query).length ? ('?' + stringifyQueryString(query)) : '');
-        window.history.pushState({}, '', newUrl);
+      newUrl.searchParams.delete("lobby");
     }
 
-    async call(name: string, params: any) {
-        return new Promise<any>((resolve, reject) => {
-            let callback = (err: any, res: any) => {
-                if (err) {
-                    return reject(err);
+    window.history.pushState({}, "", newUrl.toString());
   }
 
-                resolve(res);
-            };
-
-            let call = new Call(name, params, callback);
-            this.calls[call.id] = call;
-            this.socket.emit('call', call.id, name, params);
-        });
+  setRoomOptions(roomOptions: RoomOptions) {
+    this.socket.emit("room_options", roomOptions);
   }
 
-    setRoomOptions(roomOptions: RoomOptions) {
-        this.socket.emit('room_options', roomOptions)
+  requestStart() {
+    this.socket.emit("request_start");
   }
 
-    requestStart(seekTime: number) {
-        this.socket.emit('request_start', {
-            seekTime: seekTime
+  submitTickerMessage(message: string) {
+    return new Promise<void>((resolve, reject) => {
+      this.socket.emit(
+        "submit_ticker_message",
+        message,
+        (_: null, err?: string) => {
+          if (err) {
+            reject(err);
+          } else {
+            resolve();
+          }
+        }
+      );
     });
   }
 
   async requestJoin(roomId: number): Promise<boolean> {
-        return this.call('room_exists', {roomId: roomId}).then(v => {
-            if (v) {
-                this.socket.emit('request_join', roomId, this.autoStart());
-                if (this.autoStart()) {
-                    this.requestReady();
+    return new Promise<boolean>((resolve, reject) => {
+      this.socket.emit(
+        "request_join",
+        roomId,
+        (err?: string, didJoinRoom?: boolean) => {
+          if (err) {
+            return reject(err);
           }
-                return true;
-            } else {
-                return false;
+
+          return resolve(!!didJoinRoom);
         }
-        })
+      );
+    });
   }
 
-    requestReady() {
-        this.socket.emit('request_ready');
+  requestSetReady() {
+    this.socket.emit("request_set_ready");
   }
 
   requestJoinRandom() {
-        this.socket.emit('request_join_random');
+    this.socket.emit("request_join_random");
   }
 
   startTimeSync() {
     for (let i = 0; i < this.timeSyncIntervals.length; i++) {
-            let timeoutId = setTimeout(() => {
-                this.sendTimeSync(i === this.timeSyncIntervals.length - 1);
+      const timeoutId = setTimeout(() => {
+        // Only reschedule the last sync interval (i.e. every 30 seconds)
+        const shouldReschedule = i === this.timeSyncIntervals.length - 1;
+        this.sendTimeSync(shouldReschedule);
       }, this.timeSyncIntervals[i]);
-            // @ts-ignore
+
       this.timeSyncTimeoutIds.push(timeoutId);
     }
   }
@@ -204,8 +190,8 @@ class Connection {
   }
 
   sendTimeSync(alsoSchedule: boolean) {
-        let sync = new TimeSyncRequest();
-        this.socket.emit('time_sync', sync.requestId, Date.now());
+    const sync = new TimeSyncRequest();
+    this.socket.emit("time_sync", sync.requestId, Date.now());
     this.timeSyncs[sync.requestId] = sync;
 
     if (alsoSchedule) {
@@ -216,21 +202,21 @@ class Connection {
   }
 
   timeSyncResponse(requestId: number, clientDiff: number, serverTime: number) {
-        let syncReq = this.timeSyncs[requestId];
-        if (!syncReq) return
-        delete this.timeSyncs[requestId];
+    const syncReq = this.timeSyncs[requestId];
+    if (!syncReq) {
+      return;
+    }
+
     syncReq.response(clientDiff, serverTime);
 
-        for (let i in this.timeSyncs) {
+    for (const i in this.timeSyncs) {
       if (this.timeSyncs[i].start < Date.now() - this.timeSyncTooOld) {
         delete this.timeSyncs[i];
         break;
       }
     }
-        // console.log(this.timeSyncs);
-        // console.log('SERVER TIME', this.serverTimeOffset());
 
-        this.roomTime.set(roomTime());
+    this.roomTime.set(calculateRoomTime());
   }
 
   serverTime(): number {
@@ -240,8 +226,8 @@ class Connection {
   serverTimeOffset(): number {
     let num = 0;
     let sum = 0;
-        for (let i in this.timeSyncs) {
-            let sync = this.timeSyncs[i];
+    for (const i in this.timeSyncs) {
+      const sync = this.timeSyncs[i];
       if (!sync.ready) continue;
       sum += sync.offset;
       num += 1;
@@ -255,28 +241,12 @@ class Connection {
   }
 }
 
-let _callId = 0;
-
-class Call {
-    id: number;
-    name: string;
-    params: any;
-    callback: (err: any, res: any) => any;
-
-    constructor(name: string, params: any, callback: (err: any, res: any) => void) {
-        this.name = name;
-        this.params = params;
-        this.id = _callId++;
-        this.callback = callback;
-    }
-}
-
 let _timeSyncId = 0;
 
 class TimeSyncRequest {
   requestId: number;
   start: number;
-    offset: number = 0;
+  offset = 0;
   ready = false;
 
   constructor() {
@@ -286,18 +256,16 @@ class TimeSyncRequest {
 
   response(clientDiff: number, serverTime: number) {
     this.ready = true;
-        let now = Date.now();
+    const now = Date.now();
 
-        let lag = now - this.start;
+    const lag = now - this.start;
     this.offset = serverTime - now + lag / 2;
     // console.log('TIME SYNC', 'cdiff:', clientDiff, 'lag:',
     // lag, 'diff:', serverTime - now, 'offset:', this.offset);
   }
 }
 
-let connection: Connection = new Connection();
-// @ts-ignore
-window['connection'] = connection;
+const connection: Connection = new Connection();
 export default connection;
 
 export function useRoom(): Room | null {
@@ -309,7 +277,7 @@ export function useConfig(): Config | null {
 }
 
 export function useRoomRunningAndReadyChanged(): Room | null {
-    return useSub(connection.room, (v) => [v && v.running && v.readyToParticipate]);
+  return useSub(connection.room, (v) => [v, v?.running, v?.readyToParticipate]);
 }
 
 export function useTimeline(): Timeline | null {
@@ -317,19 +285,27 @@ export function useTimeline(): Timeline | null {
 }
 
 export function useTimelineSongFileChanged(): Timeline | null {
-    return useSub(connection.timeline, (v) => [v && v.songFile]);
+  return useSub(connection.timeline, (v) => [v?.songFile]);
 }
 
 export function useRoomTime(): number {
-    return useSub(connection.roomTime);
+  return useSub(connection.roomTime) || 0;
 }
 
-export function roomTime(): number {
-    let room = connection.room.get();
-    if (!room) return 0;
+/**
+ * Calculates the current room time, adjusted for any possible server time
+ * offset and lag.
+ */
+export function calculateRoomTime(): number {
+  const room = connection.room.get();
+
+  if (!room || typeof room.startTime === "undefined") {
+    return 0;
+  }
+
   return (connection.serverTime() - room.startTime) * room.speedFactor;
 }
 
 export function useIsConnected(): boolean {
-    return useSub(connection.isConnected);
+  return useSub(connection.isConnected) || false;
 }

frontend/src/react-app-env.d.ts

@@ -1 +0,0 @@
-/// <reference types="react-scripts" />

frontend/src/types/types.ts

@@ -1,34 +1,24 @@
-export interface Tick {
-    current: number,
-    next?: {
-        timestamp: number,
-        events: TimestampEvent[]
-    },
-    nextShot?: {
-        timestamp: number,
-        count: number
-    }
-}
-
 export interface Config {
-    availableTimelines: string[]
+  availableTimelines: string[];
 }
 
 export interface Room {
-    id: number,
-    userCount: number,
-    isLeader: boolean,
-    running: boolean,
-    startTime: number,
-    seekTime: number,
-    timelineName: string,
-    readyToParticipate: boolean,
-    speedFactor: number
+  id: number;
+  userCount: number;
+  isLeader: boolean;
+  running: boolean;
+  startTime?: number;
+  seekTime: number;
+  timelineName: string;
+  readyToParticipate: boolean;
+  speedFactor: number;
+  ticker: string[];
+  users?: { id: string; readyToParticipate: boolean }[];
 }
 
 export class RoomOptions {
-    seekTime: number
-    timelineName: string
+  seekTime: number;
+  timelineName: string;
 
   constructor(seekTime: number, timelineName: string) {
     this.seekTime = seekTime;
@@ -37,42 +27,99 @@ export class RoomOptions {
 }
 
 export class Timeline {
-    name: string
-    songFile: string
-    feed: TimelineItem[]
+  name: string;
+  songFile: string;
+  feed: TimelineItem[];
 
   constructor(obj: any) {
     this.name = obj.name;
     this.songFile = obj.songFile;
     this.feed = obj.feed;
+
+    this.feed = this.feed.sort((a, b) => a.timestamp - b.timestamp);
+
+    // Add string ids to the feed to uniquely identify them in the various
+    // reactive components.
+    for (let i = 0; i < this.feed.length; i++) {
+      this.feed[i].id = i.toString();
+      for (let j = 0; j < this.feed[i].events.length; j++) {
+        this.feed[i].events[j].id = `${i}:${j}`;
+      }
+    }
+  }
+
+  getTotalShotCount(): number {
+    let maxShot = 0;
+
+    for (const item of this.feed) {
+      for (const event of item.events) {
+        if (event.type === "shot") {
+          maxShot = Math.max(
+            maxShot,
+            (event as TimestampEventShot).shotCount || 0
+          );
+        }
+      }
     }
 
-    itemAtTime(time: number, type: string = ''): [TimelineItem | null, TimelineItem | null] {
-        let feedToSearch = type ? this.feed.filter(i => i.events.some(j => j.type == type)) : this.feed;
+    return maxShot;
+  }
+
+  itemAfterTime(time: number, type?: EventType): TimelineItem | undefined {
+    const feedToSearch = type
+      ? this.feed.filter((i) => i.events.some((j) => j.type === type))
+      : this.feed;
+    return feedToSearch.find((item) => item.timestamp * 1000 > time);
+  }
+
+  itemBeforeTime(time: number, type?: EventType): TimelineItem | undefined {
+    const feedToSearch = type
+      ? this.feed.filter((i) => i.events.some((j) => j.type === type))
+      : this.feed;
+    return feedToSearch.reverse().find((item) => item.timestamp * 1000 < time);
+  }
+
+  eventAfterTime(time: number, type: "shot"): TimestampEventShot | undefined;
+  eventAfterTime(time: number, type: EventType): TimestampEvent | undefined {
+    const item = this.itemAfterTime(time, type);
 
-        for (let i = 1; i < feedToSearch.length; i++) {
-            if (feedToSearch[i].timestamp * 1000 >= time) {
-                return [feedToSearch[i - 1], feedToSearch[i]];
+    if (!item || !item.events.length) {
+      return undefined;
     }
+
+    return item.events.find((ev) => ev.type === type);
   }
 
-        return [feedToSearch[feedToSearch.length - 1], null];
+  eventBeforeTime(time: number, type: "shot"): TimestampEventShot | undefined;
+  eventBeforeTime(time: number, type: EventType): TimestampEvent | undefined {
+    const item = this.itemBeforeTime(time, type);
+
+    if (!item || !item.events.length) {
+      return undefined;
     }
 
-    eventAtTime(time: number, type: string = ''): [TimestampEvent | null, TimestampEvent | null] {
-        let [current, next] = this.itemAtTime(time, type)
-        return [current ? (current.events.find(i => i.type == type) || null) : null,
-            next ? (next.events.find(i => i.type == type) || null) : null]
+    return item.events.find((ev) => ev.type === type);
   }
 }
 
 export interface TimelineItem {
-    timestamp: number,
-    events: TimestampEvent[]
+  id: string;
+  timestamp: number;
+  events: TimestampEvent[];
+}
+
+export const EVENT_PRIORITY: EventType[] = ["shot", "talk", "time", "song"];
+export type EventType = "talk" | "shot" | "song" | "time";
+
+interface TimestampEventBase {
+  id: string;
+  type: EventType;
+  text: string[];
 }
 
-export interface TimestampEvent {
-    type: 'talk' | 'shot' | 'song' | 'time',
-    text: string[],
-    shotCount?: number
+interface TimestampEventShot extends TimestampEventBase {
+  type: "shot";
+  shotCount: number;
 }
+
+export type TimestampEvent = TimestampEventBase | TimestampEventShot;

frontend/src/util/hooks.ts

@@ -1,11 +1,34 @@
-import {useEffect, useState} from "react";
+import { useEffect, useState } from "react";
 
 export function useUpdateAfterDelay(delay: number) {
-    const [_, timedUpdateSet] = useState(0);
+  const [, timedUpdateSet] = useState(0);
   useEffect(() => {
-        let timeoutId = setTimeout(() => {
-            timedUpdateSet(v => v + 1);
+    const timeoutId = setTimeout(() => {
+      timedUpdateSet((v) => v + 1);
     }, delay);
-        return () => clearTimeout(timeoutId)
-    })
+    return () => clearTimeout(timeoutId);
+  });
+}
+
+export function useResize() {
+  const [dimensions, setDimensions] = useState({
+    height: window.innerHeight,
+    width: window.innerWidth,
+  });
+
+  useEffect(() => {
+    const listener = (ev: UIEvent) => {
+      setDimensions({
+        height: window.innerHeight,
+        width: window.innerWidth,
+      });
+    };
+    window.addEventListener("resize", listener);
+
+    return () => {
+      window.removeEventListener("resize", listener);
+    };
+  });
+
+  return dimensions;
 }

frontend/src/util/socket.ts

@@ -1,9 +1,11 @@
+import { Socket } from "socket.io-client";
+
 /**
  * Promisify emit.
  * @param event
  * @param arg
  */
-export function emit(socket: SocketIOClient.Socket, event: string, arg: any = null) {
+export function emit(socket: Socket, event: string, arg: any = null) {
   return new Promise((resolve, reject) => {
     const cb = (err: any, res: any) => {
       if (err) {
@@ -13,11 +15,10 @@ export function emit(socket: SocketIOClient.Socket, event: string, arg: any = nu
       resolve(res);
     };
 
-        if (arg === null || typeof arg === 'undefined') {
+    if (arg === null || typeof arg === "undefined") {
       socket.emit(event, cb);
     } else {
       socket.emit(event, arg, cb);
     }
-
-    })
+  });
 }

frontend/src/util/sub.ts

@@ -1,8 +1,8 @@
-import {useEffect, useState} from "react";
+import { useEffect, useState } from "react";
 
 export class Sub<T> {
   _listeners: ((obj: T) => void)[] = [];
-    _current: any = null;
+  _current: T | null = null;
 
   subscribe(listener: any) {
     if (this._listeners.indexOf(listener) < 0) {
@@ -11,30 +11,39 @@ export class Sub<T> {
   }
 
   unsubscribe(listener: any) {
-        let index = this._listeners.indexOf(listener);
+    const index = this._listeners.indexOf(listener);
     if (index >= 0) {
       this._listeners.splice(index, 1);
     }
   }
 
-    get() {
+  get(): T | null {
     return this._current;
   }
 
   set(obj: T) {
     this._current = obj;
-        this._listeners.forEach(cb => cb(obj));
+    this._listeners.forEach((cb) => cb(obj));
   }
 }
 
-export function useSub<T>(sub: Sub<T>, effectChanges: ((v: T) => any[]) | null = null): T {
+export function useSub<T>(
+  sub: Sub<T>,
+  effectChanges: ((v: T | null) => any[]) | null = null
+): T | null {
   const [currentState, stateSetter] = useState(sub.get());
 
-    useEffect(() => {
-        let listener = (obj: T) => stateSetter(obj);
+  useEffect(
+    () => {
+      const listener = (obj: T) => stateSetter(obj);
       sub.subscribe(listener);
       return () => sub.unsubscribe(listener);
-    }, effectChanges ? effectChanges(currentState) : []);
+      // This effect uses "sub" from outside of its scope, should it be a dependency?
+      // Ignore the lint warning for now.
+      // eslint-disable-next-line
+    },
+    effectChanges ? effectChanges(currentState) : []
+  );
 
   return currentState;
 }

frontend/tsconfig.json

@@ -1,23 +1,21 @@
 {
   "compilerOptions": {
-    "target": "es5",
-    "lib": [
-      "dom",
-      "dom.iterable",
-      "esnext"
-    ],
-    "allowJs": true,
-    "skipLibCheck": true,
-    "esModuleInterop": true,
+    "target": "ESNext",
+    "lib": ["dom", "dom.iterable", "esnext"],
+    "types": ["vite/client", "vite-plugin-svgr/client"],
+    "allowJs": false,
+    "skipLibCheck": false,
+    "esModuleInterop": false,
     "allowSyntheticDefaultImports": true,
     "strict": true,
     "forceConsistentCasingInFileNames": true,
+    "noFallthroughCasesInSwitch": true,
     "module": "esnext",
     "moduleResolution": "node",
     "resolveJsonModule": true,
     "isolatedModules": true,
     "noEmit": true,
-    "jsx": "react"
+    "jsx": "react-jsx"
   },
   "include": [
     "src"

frontend/vite.config.ts

@@ -0,0 +1,46 @@
+import { defineConfig } from "vite";
+import react from "@vitejs/plugin-react";
+import svgr from "vite-plugin-svgr";
+import vitePluginImp from "vite-plugin-imp";
+
+// https://vitejs.dev/config/
+export default defineConfig({
+  // This changes the out put dir from dist to build
+  // comment this out if that isn't relevant for your project
+  build: {
+    outDir: "build",
+  },
+  plugins: [
+    react(),
+    svgr(),
+    vitePluginImp({
+      libList: [
+        {
+          libName: "antd",
+          style: (name) => `antd/es/${name}/style`,
+        },
+      ],
+    }),
+  ],
+  server: {
+    proxy: {
+      "/socket.io": {
+        target: "http://localhost:3001",
+        ws: true,
+      },
+    },
+  },
+  resolve: {
+    alias: [{ find: /^~/, replacement: "" }],
+  },
+  css: {
+    preprocessorOptions: {
+      less: {
+        modifyVars: {
+          "primary-color": "#304ba3",
+        },
+        javascriptEnabled: true,
+      },
+    },
+  },
+});

package.json

@@ -0,0 +1,44 @@
+{
+  "name": "centurion",
+  "version": "1.0.0",
+  "description": "Centurion: Honderd minuten... Honderd shots... Kan jij het aan?",
+  "engines": {
+    "node": ">=16",
+    "npm": ">=7"
+  },
+  "workspaces": [
+    "frontend",
+    "backend"
+  ],
+  "scripts": {
+    "fmt": "prettier -w '**/*.{ts,tsx}'",
+    "check-fmt": "prettier --check '**/*.{ts,tsx}'",
+    "prepare": "husky install"
+  },
+  "repository": {
+    "type": "git",
+    "url": "git@gitlab.com:studieverenigingvia/ict/centurion.git"
+  },
+  "author": "Vereniging Informatiewetenschappen Amsterdam (V.I.A.)",
+  "license": "MIT",
+  "devDependencies": {
+    "@typescript-eslint/eslint-plugin": "^5.6.0",
+    "@typescript-eslint/parser": "^5.6.0",
+    "eslint": "^8.4.1",
+    "eslint-config-react-app": "^6.0.0",
+    "eslint-plugin-import": "^2.25.3",
+    "eslint-plugin-react": "^7.27.1",
+    "eslint-plugin-react-hooks": "^4.3.0",
+    "husky": "^7.0.4",
+    "lint-staged": "^12.1.2",
+    "prettier": "^2.5.1",
+    "typescript": "^4.5.2"
+  },
+  "lint-staged": {
+    "backend/**/*.{ts,tsx}": "eslint --fix",
+    "frontend/**/*.{ts,tsx}": "eslint --fix", 
+    "*.{ts,tsx}": [
+      "prettier -w"
+    ]
+  }
+}