Merge branch 'develop' into 2daysLimit

Signed-off-by: Gregoire Parant <g.parant@thecodingmachine.com>

.github/workflows/end_to_end_tests.yml

@@ -11,10 +11,42 @@ on:
 
 jobs:
 
+  start-runner:
+    name: Start self-hosted EC2 runner
+    runs-on: ubuntu-latest
+    outputs:
+      label: ${{ steps.start-ec2-runner.outputs.label }}
+      ec2-instance-id: ${{ steps.start-ec2-runner.outputs.ec2-instance-id }}
+    steps:
+      - name: Configure AWS credentials
+        uses: aws-actions/configure-aws-credentials@v1
+        with:
+          aws-access-key-id: ${{ secrets.AWS_ACCESS_KEY_ID }}
+          aws-secret-access-key: ${{ secrets.AWS_SECRET_ACCESS_KEY }}
+          aws-region: ${{ secrets.AWS_REGION }}
+      - name: Start EC2 runner
+        id: start-ec2-runner
+        uses: machulav/ec2-github-runner@v2
+        with:
+          mode: start
+          github-token: ${{ secrets.GH_PERSONAL_ACCESS_TOKEN }}
+          ec2-image-id: ami-094dbcc53250a2480
+          ec2-instance-type: t3.xlarge
+          subnet-id: subnet-0ac40025f559df1bc
+          security-group-id: sg-0e36e96e3b8ed2d64
+          #iam-role-name: my-role-name # optional, requires additional permissions
+          #aws-resource-tags: > # optional, requires additional permissions
+          #  [
+          #    {"Key": "Name", "Value": "ec2-github-runner"},
+          #    {"Key": "GitHubRepository", "Value": "${{ github.repository }}"}
+          #  ]
+
+
   end-to-end-tests:
     name: "End-to-end testcafe tests"
 
-    runs-on: "ubuntu-latest"
+    needs: start-runner # required to start the main job when the runner is ready
+    runs-on: ${{ needs.start-runner.outputs.label }} # run the job on the newly created runner
 
     steps:
       - name: "Checkout"
@@ -67,3 +99,25 @@ jobs:
       - name: Display logs
         if: ${{ failure() }}
         run: docker-compose logs
+
+  stop-runner:
+    name: Stop self-hosted EC2 runner
+    needs:
+      - start-runner # required to get output from the start-runner job
+      - end-to-end-tests # required to wait when the main job is done
+    runs-on: ubuntu-latest
+    if: ${{ always() }} # required to stop the runner even if the error happened in the previous jobs
+    steps:
+      - name: Configure AWS credentials
+        uses: aws-actions/configure-aws-credentials@v1
+        with:
+          aws-access-key-id: ${{ secrets.AWS_ACCESS_KEY_ID }}
+          aws-secret-access-key: ${{ secrets.AWS_SECRET_ACCESS_KEY }}
+          aws-region: ${{ secrets.AWS_REGION }}
+      - name: Stop EC2 runner
+        uses: machulav/ec2-github-runner@v2
+        with:
+          mode: stop
+          github-token: ${{ secrets.GH_PERSONAL_ACCESS_TOKEN }}
+          label: ${{ needs.start-runner.outputs.label }}
+          ec2-instance-id: ${{ needs.start-runner.outputs.ec2-instance-id }}

back/Dockerfile

@@ -1,11 +1,11 @@
 # protobuf build
-FROM node:14.15.4-buster-slim@sha256:cbae886186467bbfd274b82a234a1cdfbbd31201c2a6ee63a6893eefcf3c6e76 as builder
+FROM node:14.18.2-buster-slim@sha256:20bedf0c09de887379e59a41c04284974f5fb529cf0e13aab613473ce298da3d as builder
 WORKDIR /usr/src
 COPY messages .
 RUN yarn install && yarn proto
 
 # typescript build
-FROM node:14.15.4-buster-slim@sha256:cbae886186467bbfd274b82a234a1cdfbbd31201c2a6ee63a6893eefcf3c6e76 as builder2
+FROM node:14.18.2-buster-slim@sha256:20bedf0c09de887379e59a41c04284974f5fb529cf0e13aab613473ce298da3d as builder2
 WORKDIR /usr/src
 COPY back/yarn.lock back/package.json ./
 RUN yarn install
@@ -15,7 +15,7 @@ ENV NODE_ENV=production
 RUN yarn run tsc
 
 # final production image
-FROM node:14.15.4-buster-slim@sha256:cbae886186467bbfd274b82a234a1cdfbbd31201c2a6ee63a6893eefcf3c6e76
+FROM node:14.18.2-buster-slim@sha256:20bedf0c09de887379e59a41c04284974f5fb529cf0e13aab613473ce298da3d
 WORKDIR /usr/src
 COPY back/yarn.lock back/package.json ./
 COPY --from=builder2 /usr/src/dist /usr/src/dist

back/package.json

@@ -68,14 +68,14 @@
     "@types/mkdirp": "^1.0.1",
     "@types/redis": "^2.8.31",
     "@types/uuidv4": "^5.0.0",
-    "@typescript-eslint/eslint-plugin": "^2.26.0",
-    "@typescript-eslint/parser": "^2.26.0",
-    "eslint": "^6.8.0",
+    "@typescript-eslint/eslint-plugin": "^5.8.0",
+    "@typescript-eslint/parser": "^5.8.0",
+    "eslint": "^8.5.0",
     "jasmine": "^3.5.0",
     "lint-staged": "^11.0.0",
     "prettier": "^2.3.1",
-    "ts-node-dev": "^1.0.0-pre.44",
-    "typescript": "^3.8.3"
+    "ts-node-dev": "^1.1.8",
+    "typescript": "^4.5.4"
   },
   "lint-staged": {
     "*.ts": [

back/server.ts

@@ -1,15 +1,15 @@
 // lib/server.ts
 import App from "./src/App";
 import grpc from "grpc";
-import {roomManager} from "./src/RoomManager";
-import {IRoomManagerServer, RoomManagerService} from "./src/Messages/generated/messages_grpc_pb";
-import {HTTP_PORT, GRPC_PORT} from "./src/Enum/EnvironmentVariable";
+import { roomManager } from "./src/RoomManager";
+import { IRoomManagerServer, RoomManagerService } from "./src/Messages/generated/messages_grpc_pb";
+import { HTTP_PORT, GRPC_PORT } from "./src/Enum/EnvironmentVariable";
 
-App.listen(HTTP_PORT, () => console.log(`WorkAdventure HTTP API starting on port %d!`, HTTP_PORT))
+App.listen(HTTP_PORT, () => console.log(`WorkAdventure HTTP API starting on port %d!`, HTTP_PORT));
 
 const server = new grpc.Server();
 server.addService<IRoomManagerServer>(RoomManagerService, roomManager);
 
-server.bind('0.0.0.0:'+GRPC_PORT, grpc.ServerCredentials.createInsecure());
+server.bind(`0.0.0.0:${GRPC_PORT}`, grpc.ServerCredentials.createInsecure());
 server.start();
-console.log('WorkAdventure HTTP/2 API starting on port %d!', GRPC_PORT);
+console.log("WorkAdventure HTTP/2 API starting on port %d!", GRPC_PORT);

back/src/Controller/DebugController.ts

@@ -36,9 +36,11 @@ export class DebugController {
                                     return "BatchedMessages";
                                 }
                                 if (value instanceof Map) {
-                                    const obj: any = {}; // eslint-disable-line @typescript-eslint/no-explicit-any
+                                    const obj: { [key: string | number]: unknown } = {};
                                     for (const [mapKey, mapValue] of value.entries()) {
-                                        obj[mapKey] = mapValue;
+                                        if (typeof mapKey === "number" || typeof mapKey === "string") {
+                                            obj[mapKey] = mapValue;
+                                        }
                                     }
                                     return obj;
                                 } else if (value instanceof Set) {

back/src/Controller/PrometheusController.ts

@@ -1,12 +1,10 @@
 import { App } from "../Server/sifrr.server";
 import { HttpRequest, HttpResponse } from "uWebSockets.js";
-const register = require("prom-client").register;
-const collectDefaultMetrics = require("prom-client").collectDefaultMetrics;
+import { register, collectDefaultMetrics } from "prom-client";
 
 export class PrometheusController {
     constructor(private App: App) {
         collectDefaultMetrics({
-            timeout: 10000,
             gcDurationBuckets: [0.001, 0.01, 0.1, 1, 2, 5], // These are the default buckets.
         });
 

back/src/Model/GameRoom.ts

@@ -21,6 +21,7 @@ import {
     SubToPusherRoomMessage,
     VariableMessage,
     VariableWithTagMessage,
+    ServerToClientMessage,
 } from "../Messages/generated/messages_pb";
 import { ProtobufUtils } from "../Model/Websocket/ProtobufUtils";
 import { RoomSocket, ZoneSocket } from "src/RoomManager";
@@ -34,6 +35,7 @@ import { ADMIN_API_URL } from "../Enum/EnvironmentVariable";
 import { LocalUrlError } from "../Services/LocalUrlError";
 import { emitErrorOnRoomSocket } from "../Services/MessageHelpers";
 import { VariableError } from "../Services/VariableError";
+import { isRoomRedirect } from "../Services/AdminApi/RoomRedirect";
 
 export type ConnectCallback = (user: User, group: Group) => void;
 export type DisconnectCallback = (user: User, group: Group) => void;
@@ -109,10 +111,6 @@ export class GameRoom {
         return gameRoom;
     }
 
-    public getGroups(): Group[] {
-        return Array.from(this.groups.values());
-    }
-
     public getUsers(): Map<number, User> {
         return this.users;
     }
@@ -175,6 +173,14 @@ export class GameRoom {
         if (userObj !== undefined && typeof userObj.group !== "undefined") {
             this.leaveGroup(userObj);
         }
+
+        if (user.hasFollowers()) {
+            user.stopLeading();
+        }
+        if (user.following) {
+            user.following.delFollower(user);
+        }
+
         this.users.delete(user.id);
         this.usersByUuid.delete(user.uuid);
 
@@ -213,8 +219,8 @@ export class GameRoom {
         if (user.silent) {
             return;
         }
-
-        if (user.group === undefined) {
+        const group = user.group;
+        if (group === undefined) {
             // If the user is not part of a group:
             //  should he join a group?
 
@@ -245,13 +251,40 @@ export class GameRoom {
         } else {
             // If the user is part of a group:
             //  should he leave the group?
-            const distance = GameRoom.computeDistanceBetweenPositions(user.getPosition(), user.group.getPosition());
-            if (distance > this.groupRadius) {
-                this.leaveGroup(user);
+            let noOneOutOfBounds = true;
+            group.getUsers().forEach((foreignUser: User) => {
+                if (foreignUser.group === undefined) {
+                    return;
+                }
+                const usrPos = foreignUser.getPosition();
+                const grpPos = foreignUser.group.getPosition();
+                const distance = GameRoom.computeDistanceBetweenPositions(usrPos, grpPos);
+
+                if (distance > this.groupRadius) {
+                    if (foreignUser.hasFollowers() || foreignUser.following) {
+                        // If one user is out of the group bounds BUT following, the group still exists... but should be hidden.
+                        // We put it in 'outOfBounds' mode
+                        group.setOutOfBounds(true);
+                        noOneOutOfBounds = false;
+                    } else {
+                        this.leaveGroup(foreignUser);
+                    }
+                }
+            });
+            if (noOneOutOfBounds && !user.group?.isEmpty()) {
+                group.setOutOfBounds(false);
             }
         }
     }
 
+    public sendToOthersInGroupIncludingUser(user: User, message: ServerToClientMessage): void {
+        user.group?.getUsers().forEach((currentUser: User) => {
+            if (currentUser.id !== user.id) {
+                currentUser.socket.write(message);
+            }
+        });
+    }
+
     setSilent(user: User, silent: boolean) {
         if (user.silent === silent) {
             return;
@@ -279,12 +312,9 @@ export class GameRoom {
         }
         group.leave(user);
         if (group.isEmpty()) {
-            this.positionNotifier.leave(group);
             group.destroy();
             if (!this.groups.has(group)) {
-                throw new Error(
-                    "Could not find group " + group.getId() + " referenced by user " + user.id + " in World."
-                );
+                throw new Error(`Could not find group ${group.getId()} referenced by user ${user.id} in World.`);
             }
             this.groups.delete(group);
             //todo: is the group garbage collected?
@@ -485,9 +515,9 @@ export class GameRoom {
         }
 
         const result = await adminApi.fetchMapDetails(roomUrl);
-        if (!isMapDetailsData(result)) {
-            console.error("Unexpected room details received from server", result);
-            throw new Error("Unexpected room details received from server");
+        if (isRoomRedirect(result)) {
+            console.error("Unexpected room redirect received while querying map details", result);
+            throw new Error("Unexpected room redirect received while querying map details");
         }
         return result;
     }

back/src/Model/Group.ts

@@ -16,6 +16,10 @@ export class Group implements Movable {
     private wasDestroyed: boolean = false;
     private roomId: string;
     private currentZone: Zone | null = null;
+    /**
+     * When outOfBounds = true, a user if out of the bounds of the group BUT still considered inside it (because we are in following mode)
+     */
+    private outOfBounds = false;
 
     constructor(
         roomId: string,
@@ -78,6 +82,10 @@ export class Group implements Movable {
         this.x = x;
         this.y = y;
 
+        if (this.outOfBounds) {
+            return;
+        }
+
         if (oldX === undefined) {
             this.currentZone = this.positionNotifier.enter(this);
         } else {
@@ -116,7 +124,7 @@ export class Group implements Movable {
     leave(user: User): void {
         const success = this.users.delete(user);
         if (success === false) {
-            throw new Error("Could not find user " + user.id + " in the group " + this.id);
+            throw new Error(`Could not find user ${user.id} in the group ${this.id}`);
         }
         user.group = undefined;
 
@@ -133,6 +141,10 @@ export class Group implements Movable {
      * Usually used when there is only one user left.
      */
     destroy(): void {
+        if (!this.outOfBounds) {
+            this.positionNotifier.leave(this);
+        }
+
         for (const user of this.users) {
             this.leave(user);
         }
@@ -142,4 +154,26 @@ export class Group implements Movable {
     get getSize() {
         return this.users.size;
     }
+
+    /**
+     * A group can have at most one person leading the way in it.
+     */
+    get leader(): User | undefined {
+        for (const user of this.users) {
+            if (user.hasFollowers()) {
+                return user;
+            }
+        }
+        return undefined;
+    }
+
+    setOutOfBounds(outOfBounds: boolean): void {
+        if (this.outOfBounds === true && outOfBounds === false) {
+            this.positionNotifier.enter(this);
+            this.outOfBounds = false;
+        } else if (this.outOfBounds === false && outOfBounds === true) {
+            this.positionNotifier.leave(this);
+            this.outOfBounds = true;
+        }
+    }
 }

back/src/Model/User.ts

@@ -7,6 +7,8 @@ import { ServerDuplexStream } from "grpc";
 import {
     BatchMessage,
     CompanionMessage,
+    FollowAbortMessage,
+    FollowConfirmationMessage,
     PusherToBackMessage,
     ServerToClientMessage,
     SetPlayerDetailsMessage,
@@ -19,6 +21,8 @@ export type UserSocket = ServerDuplexStream<PusherToBackMessage, ServerToClientM
 export class User implements Movable {
     public listenedZones: Set<Zone>;
     public group?: Group;
+    private _following: User | undefined;
+    private followedBy: Set<User> = new Set<User>();
 
     public constructor(
         public id: number,
@@ -50,6 +54,45 @@ export class User implements Movable {
         this.positionNotifier.updatePosition(this, position, oldPosition);
     }
 
+    public addFollower(follower: User): void {
+        this.followedBy.add(follower);
+        follower._following = this;
+
+        const message = new FollowConfirmationMessage();
+        message.setFollower(follower.id);
+        message.setLeader(this.id);
+        const clientMessage = new ServerToClientMessage();
+        clientMessage.setFollowconfirmationmessage(message);
+        this.socket.write(clientMessage);
+    }
+
+    public delFollower(follower: User): void {
+        this.followedBy.delete(follower);
+        follower._following = undefined;
+
+        const message = new FollowAbortMessage();
+        message.setFollower(follower.id);
+        message.setLeader(this.id);
+        const clientMessage = new ServerToClientMessage();
+        clientMessage.setFollowabortmessage(message);
+        this.socket.write(clientMessage);
+        follower.socket.write(clientMessage);
+    }
+
+    public hasFollowers(): boolean {
+        return this.followedBy.size !== 0;
+    }
+
+    get following(): User | undefined {
+        return this._following;
+    }
+
+    public stopLeading(): void {
+        for (const follower of this.followedBy) {
+            this.delFollower(follower);
+        }
+    }
+
     private batchedMessages: BatchMessage = new BatchMessage();
     private batchTimeout: NodeJS.Timeout | null = null;
 

back/src/Model/Zone.ts

@@ -39,21 +39,13 @@ export class Zone {
         const result = this.things.delete(thing);
         if (!result) {
             if (thing instanceof User) {
-                throw new Error("Could not find user in zone " + thing.id);
+                throw new Error(`Could not find user in zone ${thing.id}`);
             }
             if (thing instanceof Group) {
                 throw new Error(
-                    "Could not find group " +
-                        thing.getId() +
-                        " in zone (" +
-                        this.x +
-                        "," +
-                        this.y +
-                        "). Position of group: (" +
-                        thing.getPosition().x +
-                        "," +
-                        thing.getPosition().y +
-                        ")"
+                    `Could not find group ${thing.getId()} in zone (${this.x},${this.y}). Position of group: (${
+                        thing.getPosition().x
+                    },${thing.getPosition().y})`
                 );
             }
         }

back/src/RoomManager.ts

@@ -9,6 +9,9 @@ import {
     BatchToPusherMessage,
     BatchToPusherRoomMessage,
     EmotePromptMessage,
+    FollowRequestMessage,
+    FollowConfirmationMessage,
+    FollowAbortMessage,
     EmptyMessage,
     ItemEventMessage,
     JoinRoomMessage,
@@ -119,6 +122,24 @@ const roomManager: IRoomManagerServer = {
                                 user,
                                 message.getEmotepromptmessage() as EmotePromptMessage
                             );
+                        } else if (message.hasFollowrequestmessage()) {
+                            socketManager.handleFollowRequestMessage(
+                                room,
+                                user,
+                                message.getFollowrequestmessage() as FollowRequestMessage
+                            );
+                        } else if (message.hasFollowconfirmationmessage()) {
+                            socketManager.handleFollowConfirmationMessage(
+                                room,
+                                user,
+                                message.getFollowconfirmationmessage() as FollowConfirmationMessage
+                            );
+                        } else if (message.hasFollowabortmessage()) {
+                            socketManager.handleFollowAbortMessage(
+                                room,
+                                user,
+                                message.getFollowabortmessage() as FollowAbortMessage
+                            );
                         } else if (message.hasSendusermessage()) {
                             const sendUserMessage = message.getSendusermessage();
                             socketManager.handleSendUserMessage(user, sendUserMessage as SendUserMessage);
@@ -166,7 +187,7 @@ const roomManager: IRoomManagerServer = {
         socketManager
             .addZoneListener(call, zoneMessage.getRoomid(), zoneMessage.getX(), zoneMessage.getY())
             .catch((e) => {
-                emitErrorOnZoneSocket(call, e.toString());
+                emitErrorOnZoneSocket(call, e);
             });
 
         call.on("cancelled", () => {
@@ -196,7 +217,7 @@ const roomManager: IRoomManagerServer = {
         const roomMessage = call.request;
 
         socketManager.addRoomListener(call, roomMessage.getRoomid()).catch((e) => {
-            emitErrorOnRoomSocket(call, e.toString());
+            emitErrorOnRoomSocket(call, e);
         });
 
         call.on("cancelled", () => {

back/src/Server/server/baseapp.ts

@@ -1,3 +1,5 @@
+/* eslint-disable */
+
 import { Readable } from "stream";
 import { us_listen_socket_close, TemplatedApp, HttpResponse, HttpRequest } from "uWebSockets.js";
 

back/src/Server/server/formdata.ts

@@ -1,3 +1,5 @@
+/* eslint-disable */
+
 import { createWriteStream } from "fs";
 import { join, dirname } from "path";
 import Busboy from "busboy";

back/src/Server/server/utils.ts

@@ -1,3 +1,5 @@
+/* eslint-disable */
+
 import { ReadStream } from "fs";
 
 // eslint-disable-next-line @typescript-eslint/no-explicit-any

back/src/Services/AdminApi.ts

@@ -1,7 +1,7 @@
 import { ADMIN_API_TOKEN, ADMIN_API_URL } from "../Enum/EnvironmentVariable";
 import Axios from "axios";
-import { MapDetailsData } from "./AdminApi/MapDetailsData";
-import { RoomRedirect } from "./AdminApi/RoomRedirect";
+import { isMapDetailsData, MapDetailsData } from "./AdminApi/MapDetailsData";
+import { isRoomRedirect, RoomRedirect } from "./AdminApi/RoomRedirect";
 
 class AdminApi {
     async fetchMapDetails(playUri: string): Promise<MapDetailsData | RoomRedirect> {
@@ -17,6 +17,12 @@ class AdminApi {
             headers: { Authorization: `${ADMIN_API_TOKEN}` },
             params,
         });
+
+        if (!isMapDetailsData(res.data) && !isRoomRedirect(res.data)) {
+            console.error("Unexpected answer from the /api/map admin endpoint.", res.data);
+            throw new Error("Unexpected answer from the /api/map admin endpoint.");
+        }
+
         return res.data;
     }
 }

back/src/Services/ClientEventsEmitter.ts

@@ -1,4 +1,4 @@
-const EventEmitter = require("events");
+import { EventEmitter } from "events";
 
 const clientJoinEvent = "clientJoin";
 const clientLeaveEvent = "clientLeave";

back/src/Services/MapFetcher.ts

@@ -32,7 +32,7 @@ class MapFetcher {
             //throw new Error("Invalid map format for map " + mapUrl);
             console.error("Invalid map format for map " + mapUrl);
         }
-
+        /* eslint-disable-next-line @typescript-eslint/no-unsafe-return */
         return res.data;
     }
 

back/src/Services/MessageHelpers.ts

@@ -10,7 +10,19 @@ import {
 import { UserSocket } from "_Model/User";
 import { RoomSocket, ZoneSocket } from "../RoomManager";
 
-export function emitError(Client: UserSocket, message: string): void {
+function getMessageFromError(error: unknown): string {
+    if (error instanceof Error) {
+        return error.message;
+    } else if (typeof error === "string") {
+        return error;
+    } else {
+        return "Unknown error";
+    }
+}
+
+export function emitError(Client: UserSocket, error: unknown): void {
+    const message = getMessageFromError(error);
+
     const errorMessage = new ErrorMessage();
     errorMessage.setMessage(message);
 
@@ -23,8 +35,9 @@ export function emitError(Client: UserSocket, message: string): void {
     console.warn(message);
 }
 
-export function emitErrorOnRoomSocket(Client: RoomSocket, message: string): void {
-    console.error(message);
+export function emitErrorOnRoomSocket(Client: RoomSocket, error: unknown): void {
+    console.error(error);
+    const message = getMessageFromError(error);
 
     const errorMessage = new ErrorMessage();
     errorMessage.setMessage(message);
@@ -41,8 +54,9 @@ export function emitErrorOnRoomSocket(Client: RoomSocket, message: string): void
     console.warn(message);
 }
 
-export function emitErrorOnZoneSocket(Client: ZoneSocket, message: string): void {
-    console.error(message);
+export function emitErrorOnZoneSocket(Client: ZoneSocket, error: unknown): void {
+    console.error(error);
+    const message = getMessageFromError(error);
 
     const errorMessage = new ErrorMessage();
     errorMessage.setMessage(message);

back/src/Services/SocketManager.ts

@@ -30,6 +30,9 @@ import {
     BanUserMessage,
     RefreshRoomMessage,
     EmotePromptMessage,
+    FollowRequestMessage,
+    FollowConfirmationMessage,
+    FollowAbortMessage,
     VariableMessage,
     BatchToPusherRoomMessage,
     SubToPusherRoomMessage,
@@ -197,7 +200,7 @@ export class SocketManager {
         webrtcSignalToClient.setSignal(data.getSignal());
         // TODO: only compute credentials if data.signal.type === "offer"
         if (TURN_STATIC_AUTH_SECRET !== "") {
-            const { username, password } = this.getTURNCredentials("" + user.id, TURN_STATIC_AUTH_SECRET);
+            const { username, password } = this.getTURNCredentials(user.id.toString(), TURN_STATIC_AUTH_SECRET);
             webrtcSignalToClient.setWebrtcusername(username);
             webrtcSignalToClient.setWebrtcpassword(password);
         }
@@ -227,7 +230,7 @@ export class SocketManager {
         webrtcSignalToClient.setSignal(data.getSignal());
         // TODO: only compute credentials if data.signal.type === "offer"
         if (TURN_STATIC_AUTH_SECRET !== "") {
-            const { username, password } = this.getTURNCredentials("" + user.id, TURN_STATIC_AUTH_SECRET);
+            const { username, password } = this.getTURNCredentials(user.id.toString(), TURN_STATIC_AUTH_SECRET);
             webrtcSignalToClient.setWebrtcusername(username);
             webrtcSignalToClient.setWebrtcpassword(password);
         }
@@ -310,7 +313,7 @@ export class SocketManager {
         if (thing instanceof User) {
             const userJoinedZoneMessage = new UserJoinedZoneMessage();
             if (!Number.isInteger(thing.id)) {
-                throw new Error("clientUser.userId is not an integer " + thing.id);
+                throw new Error(`clientUser.userId is not an integer ${thing.id}`);
             }
             userJoinedZoneMessage.setUserid(thing.id);
             userJoinedZoneMessage.setUseruuid(thing.uuid);
@@ -446,7 +449,10 @@ export class SocketManager {
             webrtcStartMessage1.setUserid(otherUser.id);
             webrtcStartMessage1.setInitiator(true);
             if (TURN_STATIC_AUTH_SECRET !== "") {
-                const { username, password } = this.getTURNCredentials("" + otherUser.id, TURN_STATIC_AUTH_SECRET);
+                const { username, password } = this.getTURNCredentials(
+                    otherUser.id.toString(),
+                    TURN_STATIC_AUTH_SECRET
+                );
                 webrtcStartMessage1.setWebrtcusername(username);
                 webrtcStartMessage1.setWebrtcpassword(password);
             }
@@ -460,7 +466,7 @@ export class SocketManager {
             webrtcStartMessage2.setUserid(user.id);
             webrtcStartMessage2.setInitiator(false);
             if (TURN_STATIC_AUTH_SECRET !== "") {
-                const { username, password } = this.getTURNCredentials("" + user.id, TURN_STATIC_AUTH_SECRET);
+                const { username, password } = this.getTURNCredentials(user.id.toString(), TURN_STATIC_AUTH_SECRET);
                 webrtcStartMessage2.setWebrtcusername(username);
                 webrtcStartMessage2.setWebrtcpassword(password);
             }
@@ -484,7 +490,7 @@ export class SocketManager {
         hmac.setEncoding("base64");
         hmac.write(username);
         hmac.end();
-        const password = hmac.read();
+        const password = hmac.read() as string;
         return {
             username: username,
             password: password,
@@ -839,6 +845,39 @@ export class SocketManager {
         emoteEventMessage.setActoruserid(user.id);
         room.emitEmoteEvent(user, emoteEventMessage);
     }
+
+    handleFollowRequestMessage(room: GameRoom, user: User, message: FollowRequestMessage) {
+        const clientMessage = new ServerToClientMessage();
+        clientMessage.setFollowrequestmessage(message);
+        room.sendToOthersInGroupIncludingUser(user, clientMessage);
+    }
+
+    handleFollowConfirmationMessage(room: GameRoom, user: User, message: FollowConfirmationMessage) {
+        const leader = room.getUserById(message.getLeader());
+        if (!leader) {
+            const message = `Could not follow user "{message.getLeader()}" in room "{room.roomUrl}".`;
+            console.info(message, "Maybe the user just left.");
+            return;
+        }
+
+        // By security, we look at the group leader. If the group leader is NOT the leader in the message,
+        // everybody should stop following the group leader (to avoid having 2 group leaders)
+        if (user?.group?.leader && user?.group?.leader !== leader) {
+            user?.group?.leader?.stopLeading();
+        }
+
+        leader.addFollower(user);
+    }
+
+    handleFollowAbortMessage(room: GameRoom, user: User, message: FollowAbortMessage) {
+        if (user.id === message.getLeader()) {
+            user?.group?.leader?.stopLeading();
+        } else {
+            // Forward message
+            const leader = room.getUserById(message.getLeader());
+            leader?.delFollower(user);
+        }
+    }
 }
 
 export const socketManager = new SocketManager();

back/src/Services/VariablesManager.ts

@@ -101,11 +101,11 @@ export class VariablesManager {
                     }
 
                     // We store a copy of the object (to make it immutable)
-                    objects.set(object.name, this.iTiledObjectToVariable(object));
+                    objects.set(object.name as string, this.iTiledObjectToVariable(object));
                 }
             }
         } else if (layer.type === "group") {
-            for (const innerLayer of layer.layers) {
+            for (const innerLayer of layer.layers as ITiledMapLayer[]) {
                 this.recursiveFindVariablesInLayer(innerLayer, objects);
             }
         }
@@ -116,7 +116,7 @@ export class VariablesManager {
 
         if (object.properties) {
             for (const property of object.properties) {
-                const value = property.value;
+                const value = property.value as unknown;
                 switch (property.name) {
                     case "default":
                         variable.defaultValue = JSON.stringify(value);

front/src/Administration/UserMessageManager.ts

@@ -1,27 +1,22 @@
 import { AdminMessageEventTypes, adminMessagesService } from "../Connexion/AdminMessagesService";
-import { textMessageContentStore, textMessageVisibleStore } from "../Stores/TypeMessageStore/TextMessageStore";
+import { textMessageStore } from "../Stores/TypeMessageStore/TextMessageStore";
 import { soundPlayingStore } from "../Stores/SoundPlayingStore";
 import { UPLOADER_URL } from "../Enum/EnvironmentVariable";
-import { banMessageContentStore, banMessageVisibleStore } from "../Stores/TypeMessageStore/BanMessageStore";
+import { banMessageStore } from "../Stores/TypeMessageStore/BanMessageStore";
 
 class UserMessageManager {
     receiveBannedMessageListener!: Function;
 
     constructor() {
         adminMessagesService.messageStream.subscribe((event) => {
-            textMessageVisibleStore.set(false);
-            banMessageVisibleStore.set(false);
             if (event.type === AdminMessageEventTypes.admin) {
-                textMessageContentStore.set(event.text);
-                textMessageVisibleStore.set(true);
+                textMessageStore.addMessage(event.text);
             } else if (event.type === AdminMessageEventTypes.audio) {
                 soundPlayingStore.playSound(UPLOADER_URL + event.text);
             } else if (event.type === AdminMessageEventTypes.ban) {
-                banMessageContentStore.set(event.text);
-                banMessageVisibleStore.set(true);
+                banMessageStore.addMessage(event.text);
             } else if (event.type === AdminMessageEventTypes.banned) {
-                banMessageContentStore.set(event.text);
-                banMessageVisibleStore.set(true);
+                banMessageStore.addMessage(event.text);
                 this.receiveBannedMessageListener();
             }
         });

front/src/Components/App.svelte

@@ -33,10 +33,10 @@
     import EmoteMenu from "./EmoteMenu/EmoteMenu.svelte";
     import VideoOverlay from "./Video/VideoOverlay.svelte";
     import { gameOverlayVisibilityStore } from "../Stores/GameOverlayStoreVisibility";
-    import AdminMessage from "./TypeMessage/BanMessage.svelte";
-    import TextMessage from "./TypeMessage/TextMessage.svelte";
-    import { banMessageVisibleStore } from "../Stores/TypeMessageStore/BanMessageStore";
-    import { textMessageVisibleStore } from "../Stores/TypeMessageStore/TextMessageStore";
+    import BanMessageContainer from "./TypeMessage/BanMessageContainer.svelte";
+    import TextMessageContainer from "./TypeMessage/TextMessageContainer.svelte";
+    import { banMessageStore } from "../Stores/TypeMessageStore/BanMessageStore";
+    import { textMessageStore } from "../Stores/TypeMessageStore/TextMessageStore";
     import { warningContainerStore } from "../Stores/MenuStore";
     import WarningContainer from "./WarningContainer/WarningContainer.svelte";
     import { layoutManagerVisibilityStore } from "../Stores/LayoutManagerStore";
@@ -45,6 +45,9 @@
     import AudioManager from "./AudioManager/AudioManager.svelte";
     import { showReportScreenStore, userReportEmpty } from "../Stores/ShowReportScreenStore";
     import ReportMenu from "./ReportMenu/ReportMenu.svelte";
+    import { followStateStore } from "../Stores/FollowStore";
+    import { peerStore } from "../Stores/PeerStore";
+    import FollowMenu from "./FollowMenu/FollowMenu.svelte";
 
     export let game: Game;
 </script>
@@ -75,14 +78,13 @@
             <EnableCameraScene {game} />
         </div>
     {/if}
-    {#if $banMessageVisibleStore}
+    {#if $banMessageStore.length > 0}
         <div>
-            <AdminMessage />
+            <BanMessageContainer />
         </div>
-    {/if}
-    {#if $textMessageVisibleStore}
+    {:else if $textMessageStore.length > 0}
         <div>
-            <TextMessage />
+            <TextMessageContainer />
         </div>
     {/if}
     {#if $soundPlayingStore}
@@ -105,6 +107,11 @@
             <ReportMenu />
         </div>
     {/if}
+    {#if $followStateStore !== "off" || $peerStore.size > 0}
+        <div>
+            <FollowMenu />
+        </div>
+    {/if}
     {#if $menuIconVisiblilityStore}
         <div>
             <MenuIcon />

front/src/Components/FollowMenu/FollowMenu.svelte

@@ -0,0 +1,208 @@
+<!--
+vim: ft=typescript
+-->
+<script lang="ts">
+    import { gameManager } from "../../Phaser/Game/GameManager";
+    import followImg from "../images/follow.svg";
+
+    import { followStateStore, followRoleStore, followUsersStore } from "../../Stores/FollowStore";
+
+    const gameScene = gameManager.getCurrentGameScene();
+
+    function name(userId: number): string | undefined {
+        return gameScene.MapPlayersByKey.get(userId)?.PlayerValue;
+    }
+
+    function sendFollowRequest() {
+        gameScene.connection?.emitFollowRequest();
+        followRoleStore.set("leader");
+        followStateStore.set("active");
+    }
+
+    function acceptFollowRequest() {
+        gameScene.CurrentPlayer.enableFollowing();
+        gameScene.connection?.emitFollowConfirmation();
+    }
+
+    function abortEnding() {
+        followStateStore.set("active");
+    }
+
+    function reset() {
+        gameScene.connection?.emitFollowAbort();
+        followUsersStore.stopFollowing();
+    }
+
+    function onKeyDown(e: KeyboardEvent) {
+        if (e.key === "Escape") {
+            reset();
+        }
+    }
+</script>
+
+<svelte:window on:keydown={onKeyDown} />
+
+{#if $followStateStore === "requesting"}
+    <div class="interact-menu nes-container is-rounded">
+        {#if $followRoleStore === "follower"}
+            <section class="interact-menu-title">
+                <h2>Do you want to follow {name($followUsersStore[0])}?</h2>
+            </section>
+            <section class="interact-menu-action">
+                <button type="button" class="nes-btn is-success" on:click|preventDefault={acceptFollowRequest}
+                    >Yes</button
+                >
+                <button type="button" class="nes-btn is-error" on:click|preventDefault={reset}>No</button>
+            </section>
+        {:else if $followRoleStore === "leader"}
+            <section class="interact-menu-question">
+                <p>Should never be displayed</p>
+            </section>
+        {/if}
+    </div>
+{/if}
+
+{#if $followStateStore === "ending"}
+    <div class="interact-menu nes-container is-rounded">
+        <section class="interact-menu-title">
+            <h2>Interaction</h2>
+        </section>
+        {#if $followRoleStore === "follower"}
+            <section class="interact-menu-question">
+                <p>Do you want to stop following {name($followUsersStore[0])}?</p>
+            </section>
+        {:else if $followRoleStore === "leader"}
+            <section class="interact-menu-question">
+                <p>Do you want to stop leading the way?</p>
+            </section>
+        {/if}
+        <section class="interact-menu-action">
+            <button type="button" class="nes-btn is-success" on:click|preventDefault={reset}>Yes</button>
+            <button type="button" class="nes-btn is-error" on:click|preventDefault={abortEnding}>No</button>
+        </section>
+    </div>
+{/if}
+
+{#if $followStateStore === "active" || $followStateStore === "ending"}
+    <div class="interact-status nes-container is-rounded">
+        <section class="interact-status">
+            {#if $followRoleStore === "follower"}
+                <p>Following {name($followUsersStore[0])}</p>
+            {:else if $followUsersStore.length === 0}
+                <p>Waiting for followers' confirmation</p>
+            {:else if $followUsersStore.length === 1}
+                <p>{name($followUsersStore[0])} is following you</p>
+            {:else if $followUsersStore.length === 2}
+                <p>{name($followUsersStore[0])} and {name($followUsersStore[1])} are following you</p>
+            {:else}
+                <p>
+                    {$followUsersStore.slice(0, -1).map(name).join(", ")} and {name(
+                        $followUsersStore[$followUsersStore.length - 1]
+                    )} are following you
+                </p>
+            {/if}
+        </section>
+    </div>
+{/if}
+
+{#if $followStateStore === "off"}
+    <button
+        type="button"
+        class="nes-btn is-primary follow-menu-button"
+        on:click|preventDefault={sendFollowRequest}
+        title="Ask others to follow"><img class="background-img" src={followImg} alt="" /></button
+    >
+{/if}
+
+{#if $followStateStore === "active" || $followStateStore === "ending"}
+    {#if $followRoleStore === "follower"}
+        <button
+            type="button"
+            class="nes-btn is-error follow-menu-button"
+            on:click|preventDefault={reset}
+            title="Stop following"><img class="background-img" src={followImg} alt="" /></button
+        >
+    {:else}
+        <button
+            type="button"
+            class="nes-btn is-error follow-menu-button"
+            on:click|preventDefault={reset}
+            title="Stop leading the way"><img class="background-img" src={followImg} alt="" /></button
+        >
+    {/if}
+{/if}
+
+<style lang="scss">
+    .nes-container {
+        padding: 5px;
+    }
+
+    div.interact-status {
+        background-color: #333333;
+        color: whitesmoke;
+
+        position: relative;
+        height: 2.7em;
+        width: 40vw;
+        top: 87vh;
+        margin: auto;
+        text-align: center;
+    }
+
+    div.interact-menu {
+        pointer-events: auto;
+        background-color: #333333;
+        color: whitesmoke;
+
+        position: relative;
+        width: 60vw;
+        top: 60vh;
+        margin: auto;
+
+        section.interact-menu-title {
+            margin-bottom: 20px;
+            display: flex;
+            justify-content: center;
+        }
+
+        section.interact-menu-question {
+            margin: 4px;
+            margin-bottom: 20px;
+
+            p {
+                font-size: 1.05em;
+                font-weight: bold;
+            }
+        }
+
+        section.interact-menu-action {
+            display: grid;
+            grid-gap: 10%;
+            grid-template-columns: 45% 45%;
+            margin-bottom: 20px;
+            margin-left: 5%;
+            margin-right: 5%;
+        }
+    }
+
+    .follow-menu-button {
+        position: absolute;
+        bottom: 10px;
+        left: 10px;
+        pointer-events: all;
+    }
+
+    @media only screen and (max-width: 800px) {
+        div.interact-status {
+            width: 100vw;
+            top: 78vh;
+            font-size: 0.75em;
+        }
+
+        div.interact-menu {
+            height: 21vh;
+            width: 100vw;
+            font-size: 0.75em;
+        }
+    }
+</style>

front/src/Components/Menu/SettingsSubMenu.svelte

@@ -8,6 +8,7 @@
     let fullscreen: boolean = localUserStore.getFullscreen();
     let notification: boolean = localUserStore.getNotification() === "granted";
     let forceCowebsiteTrigger: boolean = localUserStore.getForceCowebsiteTrigger();
+    let ignoreFollowRequests: boolean = localUserStore.getIgnoreFollowRequests();
     let valueGame: number = localUserStore.getGameQualityValue();
     let valueVideo: number = localUserStore.getVideoQualityValue();
     let previewValueGame = valueGame;
@@ -59,6 +60,10 @@
         localUserStore.setForceCowebsiteTrigger(forceCowebsiteTrigger);
     }
 
+    function changeIgnoreFollowRequests() {
+        localUserStore.setIgnoreFollowRequests(ignoreFollowRequests);
+    }
+
     function closeMenu() {
         menuVisiblilityStore.set(false);
     }
@@ -123,6 +128,15 @@
             />
             <span>Always ask before opening websites and Jitsi Meet rooms</span>
         </label>
+        <label>
+            <input
+                type="checkbox"
+                class="nes-checkbox is-dark"
+                bind:checked={ignoreFollowRequests}
+                on:change={changeIgnoreFollowRequests}
+            />
+            <span>Ignore requests to follow other users</span>
+        </label>
     </section>
 </div>
 

front/src/Components/TypeMessage/BanMessage.svelte

@@ -1,12 +1,11 @@
 <script lang="ts">
-    import { fly } from "svelte/transition";
-    import { banMessageVisibleStore, banMessageContentStore } from "../../Stores/TypeMessageStore/BanMessageStore";
+    import { fly, fade } from "svelte/transition";
     import { onMount } from "svelte";
+    import type { Message } from "../../Stores/TypeMessageStore/MessageStore";
+    import { banMessageStore } from "../../Stores/TypeMessageStore/BanMessageStore";
+
+    export let message: Message;
 
-    let text: string;
-    $: {
-        text = $banMessageContentStore;
-    }
     const NAME_BUTTON = "Ok";
     let nbSeconds = 10;
     let nameButton = "";
@@ -28,17 +27,21 @@
     }
 
     function closeBanMessage() {
-        banMessageVisibleStore.set(false);
+        banMessageStore.clearMessageById(message.id);
     }
 </script>
 
-<div class="main-ban-message nes-container is-rounded" transition:fly={{ y: -1000, duration: 500 }}>
+<div
+    class="main-ban-message nes-container is-rounded"
+    in:fly={{ y: -1000, duration: 500, delay: 250 }}
+    out:fade={{ duration: 200 }}
+>
     <h2 class="title-ban-message">
         <img src="resources/logos/report.svg" alt="***" /> Important message
         <img src="resources/logos/report.svg" alt="***" />
     </h2>
     <div class="content-ban-message">
-        <p>{text}</p>
+        <p>{message.text}</p>
     </div>
     <div class="footer-ban-message">
         <button

front/src/Components/TypeMessage/BanMessageContainer.svelte

@@ -0,0 +1,13 @@
+<script lang="ts">
+    import { flip } from "svelte/animate";
+    import { banMessageStore } from "../../Stores/TypeMessageStore/BanMessageStore";
+    import BanMessage from "./BanMessage.svelte";
+</script>
+
+<div class="main-ban-message-container">
+    {#each $banMessageStore.slice(0, 1) as message (message.id)}
+        <div animate:flip={{ duration: 250 }}>
+            <BanMessage {message} />
+        </div>
+    {/each}
+</div>

front/src/Components/TypeMessage/TextMessage.svelte

@@ -1,17 +1,17 @@
 <script lang="ts">
-    import { fly } from "svelte/transition";
-    import { textMessageContentStore, textMessageVisibleStore } from "../../Stores/TypeMessageStore/TextMessageStore";
+    import { fly, fade } from "svelte/transition";
     import { QuillDeltaToHtmlConverter } from "quill-delta-to-html";
+    import type { Message } from "../../Stores/TypeMessageStore/MessageStore";
+    import { textMessageStore } from "../../Stores/TypeMessageStore/TextMessageStore";
 
-    let converter: QuillDeltaToHtmlConverter;
-    $: {
-        const content = JSON.parse($textMessageContentStore);
-        converter = new QuillDeltaToHtmlConverter(content.ops, { inlineStyles: true });
-    }
+    export let message: Message;
+
+    const content = JSON.parse(message.text);
+    const converter = new QuillDeltaToHtmlConverter(content.ops, { inlineStyles: true });
     const NAME_BUTTON = "Ok";
 
     function closeTextMessage() {
-        textMessageVisibleStore.set(false);
+        textMessageStore.clearMessageById(message.id);
     }
 
     function onKeyDown(e: KeyboardEvent) {
@@ -23,7 +23,11 @@
 
 <svelte:window on:keydown={onKeyDown} />
 
-<div class="main-text-message nes-container is-rounded" transition:fly={{ x: -1000, duration: 500 }}>
+<div
+    class="main-text-message nes-container is-rounded"
+    in:fly={{ x: -1000, duration: 500, delay: 250 }}
+    out:fade={{ duration: 250 }}
+>
     <div class="content-text-message">
         {@html converter.convert()}
     </div>
@@ -43,6 +47,8 @@
         width: 80vw;
         margin-right: auto;
         margin-left: auto;
+        margin-bottom: 16px;
+        margin-top: 0;
         padding-bottom: 0;
 
         pointer-events: auto;

front/src/Components/TypeMessage/TextMessageContainer.svelte

@@ -0,0 +1,21 @@
+<script lang="ts">
+    import { flip } from "svelte/animate";
+    import TextMessage from "./TextMessage.svelte";
+    import { textMessageStore } from "../../Stores/TypeMessageStore/TextMessageStore";
+
+    const MAX_MESSAGES = 3;
+</script>
+
+<div class="main-text-message-container">
+    {#each $textMessageStore.slice(0, MAX_MESSAGES) as message (message.id)}
+        <div animate:flip={{ duration: 250 }}>
+            <TextMessage {message} />
+        </div>
+    {/each}
+</div>
+
+<style lang="scss">
+    div.main-text-message-container {
+        padding-top: 16px;
+    }
+</style>

front/src/Components/images/follow.svg

@@ -0,0 +1 @@
+<svg xmlns="http://www.w3.org/2000/svg" enable-background="new 0 0 24 24" height="24" viewBox="0 0 24 24" width="24"><rect fill="none" height="24" width="24"/><path d="M9.5,5.5c1.1,0,2-0.9,2-2s-0.9-2-2-2s-2,0.9-2,2S8.4,5.5,9.5,5.5z M5.75,8.9L3,23h2.1l1.75-8L9,17v6h2v-7.55L8.95,13.4 l0.6-3C10.85,12,12.8,13,15,13v-2c-1.85,0-3.45-1-4.35-2.45L9.7,6.95C9.35,6.35,8.7,6,8,6C7.75,6,7.5,6.05,7.25,6.15L2,8.3V13h2 V9.65L5.75,8.9 M13,2v7h3.75v14h1.5V9H22V2H13z M18.01,8V6.25H14.5v-1.5h3.51V3l2.49,2.5L18.01,8z"/></svg>

front/src/Connexion/ConnectionManager.ts

@@ -1,5 +1,5 @@
 import Axios from "axios";
-import { PUSHER_URL, START_ROOM_URL } from "../Enum/EnvironmentVariable";
+import { PUSHER_URL } from "../Enum/EnvironmentVariable";
 import { RoomConnection } from "./RoomConnection";
 import type { OnConnectInterface, PositionInterface, ViewportInterface } from "./ConnexionModels";
 import { GameConnexionTypes, urlManager } from "../Url/UrlManager";

front/src/Connexion/LocalUserStore.ts

@@ -14,6 +14,7 @@ const audioPlayerMuteKey = "audioMute";
 const helpCameraSettingsShown = "helpCameraSettingsShown";
 const fullscreenKey = "fullscreen";
 const forceCowebsiteTriggerKey = "forceCowebsiteTrigger";
+const ignoreFollowRequests = "ignoreFollowRequests";
 const lastRoomUrl = "lastRoomUrl";
 const authToken = "authToken";
 const state = "state";
@@ -128,6 +129,13 @@ class LocalUserStore {
         return localStorage.getItem(forceCowebsiteTriggerKey) === "true";
     }
 
+    setIgnoreFollowRequests(value: boolean): void {
+        localStorage.setItem(ignoreFollowRequests, value.toString());
+    }
+    getIgnoreFollowRequests(): boolean {
+        return localStorage.getItem(ignoreFollowRequests) === "true";
+    }
+
     setLastRoomUrl(roomUrl: string): void {
         localStorage.setItem(lastRoomUrl, roomUrl.toString());
         if ("caches" in window) {

front/src/Connexion/Room.ts

@@ -104,9 +104,13 @@ export class Room {
 
             const data = result.data;
 
-            if (isRoomRedirect(data.redirectUrl)) {
+            if (data.authenticationMandatory !== undefined) {
+                data.authenticationMandatory = Boolean(data.authenticationMandatory);
+            }
+
+            if (isRoomRedirect(data)) {
                 return {
-                    redirectUrl: data.redirectUrl as string,
+                    redirectUrl: data.redirectUrl,
                 };
             } else if (isMapDetailsData(data)) {
                 console.log("Map ", this.id, " resolves to URL ", data.mapUrl);

front/src/Connexion/RoomConnection.ts

@@ -30,6 +30,9 @@ import {
     PingMessage,
     EmoteEventMessage,
     EmotePromptMessage,
+    FollowRequestMessage,
+    FollowConfirmationMessage,
+    FollowAbortMessage,
     SendUserMessage,
     BanUserMessage,
     VariableMessage,
@@ -59,7 +62,10 @@ import { adminMessagesService } from "./AdminMessagesService";
 import { worldFullMessageStream } from "./WorldFullMessageStream";
 import { connectionManager } from "./ConnectionManager";
 import { emoteEventStream } from "./EmoteEventStream";
+import { get } from "svelte/store";
 import { warningContainerStore } from "../Stores/MenuStore";
+import { followStateStore, followRoleStore, followUsersStore } from "../Stores/FollowStore";
+import { localUserStore } from "./LocalUserStore";
 
 const manualPingDelay = 20000;
 
@@ -262,6 +268,21 @@ export class RoomConnection implements RoomConnection {
                 warningContainerStore.activateWarningContainer();
             } else if (message.hasRefreshroommessage()) {
                 //todo: implement a way to notify the user the room was refreshed.
+            } else if (message.hasFollowrequestmessage()) {
+                const requestMessage = message.getFollowrequestmessage();
+                if (!localUserStore.getIgnoreFollowRequests()) {
+                    followUsersStore.addFollowRequest(requestMessage.getLeader());
+                }
+            } else if (message.hasFollowconfirmationmessage()) {
+                const responseMessage = message.getFollowconfirmationmessage();
+                followUsersStore.addFollower(responseMessage.getFollower());
+            } else if (message.hasFollowabortmessage()) {
+                const abortMessage = message.getFollowabortmessage();
+                if (get(followRoleStore) === "follower") {
+                    followUsersStore.stopFollowing();
+                } else {
+                    followUsersStore.removeFollower(abortMessage.getFollower());
+                }
             } else if (message.hasErrormessage()) {
                 const errorMessage = message.getErrormessage() as ErrorMessage;
                 console.error("An error occurred server side: " + errorMessage.getMessage());
@@ -746,6 +767,43 @@ export class RoomConnection implements RoomConnection {
         this.socket.send(clientToServerMessage.serializeBinary().buffer);
     }
 
+    public emitFollowRequest(): void {
+        if (!this.userId) {
+            return;
+        }
+        const message = new FollowRequestMessage();
+        message.setLeader(this.userId);
+        const clientToServerMessage = new ClientToServerMessage();
+        clientToServerMessage.setFollowrequestmessage(message);
+        this.socket.send(clientToServerMessage.serializeBinary().buffer);
+    }
+
+    public emitFollowConfirmation(): void {
+        if (!this.userId) {
+            return;
+        }
+        const message = new FollowConfirmationMessage();
+        message.setLeader(get(followUsersStore)[0]);
+        message.setFollower(this.userId);
+        const clientToServerMessage = new ClientToServerMessage();
+        clientToServerMessage.setFollowconfirmationmessage(message);
+        this.socket.send(clientToServerMessage.serializeBinary().buffer);
+    }
+
+    public emitFollowAbort(): void {
+        const isLeader = get(followRoleStore) === "leader";
+        const hasFollowers = get(followUsersStore).length > 0;
+        if (!this.userId || (isLeader && !hasFollowers)) {
+            return;
+        }
+        const message = new FollowAbortMessage();
+        message.setLeader(isLeader ? this.userId : get(followUsersStore)[0]);
+        message.setFollower(isLeader ? 0 : this.userId);
+        const clientToServerMessage = new ClientToServerMessage();
+        clientToServerMessage.setFollowabortmessage(message);
+        this.socket.send(clientToServerMessage.serializeBinary().buffer);
+    }
+
     public getAllTags(): string[] {
         return this.tags;
     }

front/src/Phaser/Entity/Character.ts

@@ -33,7 +33,7 @@ export abstract class Character extends Container {
     private readonly playerName: Text;
     public PlayerValue: string;
     public sprites: Map<string, Sprite>;
-    private lastDirection: PlayerAnimationDirections = PlayerAnimationDirections.Down;
+    protected lastDirection: PlayerAnimationDirections = PlayerAnimationDirections.Down;
     //private teleportation: Sprite;
     private invisible: boolean;
     public companion?: Companion;
@@ -277,24 +277,20 @@ export abstract class Character extends Container {
 
         body.setVelocity(x, y);
 
-        // up or down animations are prioritized over left and right
-        if (body.velocity.y < 0) {
-            //moving up
-            this.lastDirection = PlayerAnimationDirections.Up;
-            this.playAnimation(PlayerAnimationDirections.Up, true);
-        } else if (body.velocity.y > 0) {
-            //moving down
-            this.lastDirection = PlayerAnimationDirections.Down;
-            this.playAnimation(PlayerAnimationDirections.Down, true);
-        } else if (body.velocity.x > 0) {
-            //moving right
-            this.lastDirection = PlayerAnimationDirections.Right;
-            this.playAnimation(PlayerAnimationDirections.Right, true);
-        } else if (body.velocity.x < 0) {
-            //moving left
-            this.lastDirection = PlayerAnimationDirections.Left;
-            this.playAnimation(PlayerAnimationDirections.Left, true);
+        if (Math.abs(body.velocity.x) > Math.abs(body.velocity.y)) {
+            if (body.velocity.x < 0) {
+                this.lastDirection = PlayerAnimationDirections.Left;
+            } else if (body.velocity.x > 0) {
+                this.lastDirection = PlayerAnimationDirections.Right;
+            }
+        } else {
+            if (body.velocity.y < 0) {
+                this.lastDirection = PlayerAnimationDirections.Up;
+            } else if (body.velocity.y > 0) {
+                this.lastDirection = PlayerAnimationDirections.Down;
+            }
         }
+        this.playAnimation(this.lastDirection, true);
 
         this.setDepth(this.y);
 

front/src/Phaser/Game/GameMap.ts

@@ -81,7 +81,14 @@ export class GameMap {
         let depth = -2;
         for (const layer of this.flatLayers) {
             if (layer.type === "tilelayer") {
-                this.phaserLayers.push(phaserMap.createLayer(layer.name, terrains, 0, 0).setDepth(depth));
+                this.phaserLayers.push(
+                    phaserMap
+                        .createLayer(layer.name, terrains, (layer.x || 0) * 32, (layer.y || 0) * 32)
+                        .setDepth(depth)
+                        .setAlpha(layer.opacity)
+                        .setVisible(layer.visible)
+                        .setSize(layer.width, layer.height)
+                );
             }
             if (layer.type === "objectgroup" && layer.name === "floorLayer") {
                 depth = DEPTH_OVERLAY_INDEX;

front/src/Phaser/Game/GameScene.ts

@@ -1,7 +1,7 @@
 import type { Subscription } from "rxjs";
 import AnimatedTiles from "phaser-animated-tiles";
 import { Queue } from "queue-typescript";
-import { get } from "svelte/store";
+import { get, Unsubscriber } from "svelte/store";
 
 import { userMessageManager } from "../../Administration/UserMessageManager";
 import { connectionManager } from "../../Connexion/ConnectionManager";
@@ -91,6 +91,8 @@ import { deepCopy } from "deep-copy-ts";
 import FILE_LOAD_ERROR = Phaser.Loader.Events.FILE_LOAD_ERROR;
 import { MapStore } from "../../Stores/Utils/MapStore";
 import { SetPlayerDetailsMessage } from "../../Messages/generated/messages_pb";
+import { followUsersColorStore, followUsersStore } from "../../Stores/FollowStore";
+import { getColorRgbFromHue } from "../../WebRtc/ColorGenerator";
 
 export interface GameSceneInitInterface {
     initPosition: PointInterface | null;
@@ -165,9 +167,11 @@ export class GameScene extends DirtyScene {
     private createPromise: Promise<void>;
     private createPromiseResolve!: (value?: void | PromiseLike<void>) => void;
     private iframeSubscriptionList!: Array<Subscription>;
-    private peerStoreUnsubscribe!: () => void;
-    private emoteUnsubscribe!: () => void;
-    private emoteMenuUnsubscribe!: () => void;
+    private peerStoreUnsubscribe!: Unsubscriber;
+    private emoteUnsubscribe!: Unsubscriber;
+    private emoteMenuUnsubscribe!: Unsubscriber;
+    private followUsersColorStoreUnsubscribe!: Unsubscriber;
+
     private biggestAvailableAreaStoreUnsubscribe!: () => void;
     MapUrlFile: string;
     roomUrl: string;
@@ -646,6 +650,16 @@ export class GameScene extends DirtyScene {
             }
         });
 
+        this.followUsersColorStoreUnsubscribe = followUsersColorStore.subscribe((color) => {
+            if (color !== undefined) {
+                this.CurrentPlayer.setOutlineColor(color);
+                this.connection?.emitPlayerOutlineColor(color);
+            } else {
+                this.CurrentPlayer.removeOutlineColor();
+                this.connection?.emitPlayerOutlineColor(null);
+            }
+        });
+
         Promise.all([this.connectionAnswerPromise as Promise<unknown>, ...scriptPromises]).then(() => {
             this.scene.wake();
         });
@@ -1443,6 +1457,7 @@ ${escapedMessage}
         this.peerStoreUnsubscribe();
         this.emoteUnsubscribe();
         this.emoteMenuUnsubscribe();
+        this.followUsersColorStoreUnsubscribe();
         this.biggestAvailableAreaStoreUnsubscribe();
         iframeListener.unregisterAnswerer("getState");
         iframeListener.unregisterAnswerer("loadTileset");

front/src/Phaser/Game/PlayerMovement.ts

@@ -41,7 +41,7 @@ export class PlayerMovement {
             oldX: this.startPosition.x,
             oldY: this.startPosition.y,
             direction: this.endPosition.direction,
-            moving: true,
+            moving: this.endPosition.moving,
         };
     }
 }

front/src/Phaser/Player/Player.ts

@@ -1,16 +1,17 @@
 import { PlayerAnimationDirections } from "./Animation";
 import type { GameScene } from "../Game/GameScene";
-import { UserInputEvent, UserInputManager } from "../UserInput/UserInputManager";
+import { ActiveEventList, UserInputEvent, UserInputManager } from "../UserInput/UserInputManager";
 import { Character } from "../Entity/Character";
+import type { RemotePlayer } from "../Entity/RemotePlayer";
+
+import { get } from "svelte/store";
 import { userMovingStore } from "../../Stores/GameStore";
+import { followStateStore, followRoleStore, followUsersStore } from "../../Stores/FollowStore";
 
 export const hasMovedEventName = "hasMoved";
 export const requestEmoteEventName = "requestEmote";
 
 export class Player extends Character {
-    private previousDirection: string = PlayerAnimationDirections.Down;
-    private wasMoving: boolean = false;
-
     constructor(
         Scene: GameScene,
         x: number,
@@ -29,71 +30,99 @@ export class Player extends Character {
         this.getBody().setImmovable(false);
     }
 
-    moveUser(delta: number): void {
-        //if user client on shift, camera and player speed
-        let direction = null;
-        let moving = false;
-
-        const activeEvents = this.userInputManager.getEventListForGameTick();
-        const speedMultiplier = activeEvents.get(UserInputEvent.SpeedUp) ? 25 : 9;
-        const moveAmount = speedMultiplier * 20;
-
-        let x = 0;
-        let y = 0;
+    private inputStep(activeEvents: ActiveEventList, x: number, y: number) {
+        // Process input events
         if (activeEvents.get(UserInputEvent.MoveUp)) {
-            y = -moveAmount;
-            direction = PlayerAnimationDirections.Up;
-            moving = true;
+            y = y - 1;
         } else if (activeEvents.get(UserInputEvent.MoveDown)) {
-            y = moveAmount;
-            direction = PlayerAnimationDirections.Down;
-            moving = true;
+            y = y + 1;
         }
+
         if (activeEvents.get(UserInputEvent.MoveLeft)) {
-            x = -moveAmount;
-            direction = PlayerAnimationDirections.Left;
-            moving = true;
+            x = x - 1;
         } else if (activeEvents.get(UserInputEvent.MoveRight)) {
-            x = moveAmount;
-            direction = PlayerAnimationDirections.Right;
-            moving = true;
+            x = x + 1;
         }
-        moving = moving || activeEvents.get(UserInputEvent.JoystickMove);
 
-        if (x !== 0 || y !== 0) {
+        // Compute movement deltas
+        const followMode = get(followStateStore) !== "off";
+        const speedup = activeEvents.get(UserInputEvent.SpeedUp) && !followMode ? 25 : 9;
+        const moveAmount = speedup * 20;
+        x = x * moveAmount;
+        y = y * moveAmount;
+
+        // Compute moving state
+        const joystickMovement = activeEvents.get(UserInputEvent.JoystickMove);
+        const moving = x !== 0 || y !== 0 || joystickMovement;
+
+        // Compute direction
+        let direction = this.lastDirection;
+        if (moving && !joystickMovement) {
+            if (Math.abs(x) > Math.abs(y)) {
+                direction = x < 0 ? PlayerAnimationDirections.Left : PlayerAnimationDirections.Right;
+            } else {
+                direction = y < 0 ? PlayerAnimationDirections.Up : PlayerAnimationDirections.Down;
+            }
+        }
+
+        // Send movement events
+        const emit = () => this.emit(hasMovedEventName, { moving, direction, x: this.x, y: this.y });
+        if (moving) {
             this.move(x, y);
-            this.emit(hasMovedEventName, { moving, direction, x: this.x, y: this.y, oldX: x, oldY: y });
-        } else if (this.wasMoving && moving) {
-            // slow joystick movement
-            this.move(0, 0);
-            this.emit(hasMovedEventName, {
-                moving,
-                direction: this.previousDirection,
-                x: this.x,
-                y: this.y,
-                oldX: x,
-                oldY: y,
-            });
-        } else if (this.wasMoving && !moving) {
+            emit();
+        } else if (get(userMovingStore)) {
             this.stop();
-            this.emit(hasMovedEventName, {
-                moving,
-                direction: this.previousDirection,
-                x: this.x,
-                y: this.y,
-                oldX: x,
-                oldY: y,
-            });
+            emit();
         }
 
-        if (direction !== null) {
-            this.previousDirection = direction;
-        }
-        this.wasMoving = moving;
+        // Update state
         userMovingStore.set(moving);
     }
 
-    public isMoving(): boolean {
-        return this.wasMoving;
+    private computeFollowMovement(): number[] {
+        // Find followed WOKA and abort following if we lost it
+        const player = this.scene.MapPlayersByKey.get(get(followUsersStore)[0]);
+        if (!player) {
+            this.scene.connection?.emitFollowAbort();
+            followStateStore.set("off");
+            return [0, 0];
+        }
+
+        // Compute movement direction
+        const xDistance = player.x - this.x;
+        const yDistance = player.y - this.y;
+        const distance = Math.pow(xDistance, 2) + Math.pow(yDistance, 2);
+        if (distance < 2000) {
+            return [0, 0];
+        }
+        const xMovement = xDistance / Math.sqrt(distance);
+        const yMovement = yDistance / Math.sqrt(distance);
+        return [xMovement, yMovement];
+    }
+
+    public enableFollowing() {
+        followStateStore.set("active");
+    }
+
+    public moveUser(delta: number): void {
+        const activeEvents = this.userInputManager.getEventListForGameTick();
+        const state = get(followStateStore);
+        const role = get(followRoleStore);
+
+        if (activeEvents.get(UserInputEvent.Follow)) {
+            if (state === "off" && this.scene.groups.size > 0) {
+                followStateStore.set("requesting");
+                followRoleStore.set("leader");
+            } else if (state === "active") {
+                followStateStore.set("ending");
+            }
+        }
+
+        let x = 0;
+        let y = 0;
+        if ((state === "active" || state === "ending") && role === "follower") {
+            [x, y] = this.computeFollowMovement();
+        }
+        this.inputStep(activeEvents, x, y);
     }
 }

front/src/Phaser/UserInput/UserInputManager.ts

@@ -16,6 +16,7 @@ export enum UserInputEvent {
     MoveDown,
     SpeedUp,
     Interact,
+    Follow,
     Shout,
     JoystickMove,
 }
@@ -147,6 +148,10 @@ export class UserInputManager {
                 event: UserInputEvent.Interact,
                 keyInstance: this.Scene.input.keyboard.addKey(Phaser.Input.Keyboard.KeyCodes.SPACE, false),
             },
+            {
+                event: UserInputEvent.Follow,
+                keyInstance: this.Scene.input.keyboard.addKey(Phaser.Input.Keyboard.KeyCodes.F, false),
+            },
             {
                 event: UserInputEvent.Shout,
                 keyInstance: this.Scene.input.keyboard.addKey(Phaser.Input.Keyboard.KeyCodes.F, false),

front/src/Stores/FollowStore.ts

@@ -0,0 +1,90 @@
+import { derived, writable } from "svelte/store";
+import { getColorRgbFromHue } from "../WebRtc/ColorGenerator";
+import { gameManager } from "../Phaser/Game/GameManager";
+
+type FollowState = "off" | "requesting" | "active" | "ending";
+type FollowRole = "leader" | "follower";
+
+export const followStateStore = writable<FollowState>("off");
+export const followRoleStore = writable<FollowRole>("leader");
+
+function createFollowUsersStore() {
+    const { subscribe, update, set } = writable<number[]>([]);
+
+    return {
+        subscribe,
+        addFollowRequest(leader: number): void {
+            followStateStore.set("requesting");
+            followRoleStore.set("follower");
+            set([leader]);
+        },
+        addFollower(user: number): void {
+            update((followers) => {
+                followers.push(user);
+                return followers;
+            });
+        },
+        /**
+         * Removes the follower from the store.
+         * Will update followStateStore and followRoleStore if nobody is following anymore.
+         * @param user
+         */
+        removeFollower(user: number): void {
+            update((followers) => {
+                const oldFollowerCount = followers.length;
+                followers = followers.filter((id) => id !== user);
+
+                if (followers.length === 0 && oldFollowerCount > 0) {
+                    followStateStore.set("off");
+                    followRoleStore.set("leader");
+                }
+
+                return followers;
+            });
+        },
+        stopFollowing(): void {
+            set([]);
+            followStateStore.set("off");
+            followRoleStore.set("leader");
+        },
+    };
+}
+
+export const followUsersStore = createFollowUsersStore();
+
+/**
+ * This store contains the color of the follow group. It is derived from the ID of the leader.
+ */
+export const followUsersColorStore = derived(
+    [followStateStore, followRoleStore, followUsersStore],
+    ([$followStateStore, $followRoleStore, $followUsersStore]) => {
+        console.log($followStateStore);
+        if ($followStateStore !== "active") {
+            return undefined;
+        }
+
+        if ($followUsersStore.length === 0) {
+            return undefined;
+        }
+
+        let leaderId: number;
+        if ($followRoleStore === "leader") {
+            // Let's get my ID by a quite complicated way....
+            leaderId = gameManager.getCurrentGameScene().connection?.getUserId() ?? 0;
+        } else {
+            leaderId = $followUsersStore[0];
+        }
+
+        // Let's compute a random hue between 0 and 1 that varies enough to be interesting
+        const hue = ((leaderId * 197) % 255) / 255;
+
+        let { r, g, b } = getColorRgbFromHue(hue);
+        if ($followRoleStore === "follower") {
+            // Let's make the followers very slightly darker
+            r *= 0.9;
+            g *= 0.9;
+            b *= 0.9;
+        }
+        return (Math.round(r * 255) << 16) | (Math.round(g * 255) << 8) | Math.round(b * 255);
+    }
+);

front/src/Stores/TypeMessageStore/BanMessageStore.ts

@@ -1,5 +1,3 @@
-import { writable } from "svelte/store";
+import { createMessageStore } from "./MessageStore";
 
-export const banMessageVisibleStore = writable(false);
-
-export const banMessageContentStore = writable("");
+export const banMessageStore = createMessageStore();

front/src/Stores/TypeMessageStore/MessageStore.ts

@@ -0,0 +1,29 @@
+import { writable } from "svelte/store";
+import { v4 as uuidv4 } from "uuid";
+
+export interface Message {
+    id: string;
+    text: string;
+}
+
+/**
+ * A store that contains a list of messages to be displayed.
+ */
+export function createMessageStore() {
+    const { subscribe, update } = writable<Message[]>([]);
+
+    return {
+        subscribe,
+        addMessage: (text: string): void => {
+            update((messages: Message[]) => {
+                return [...messages, { id: uuidv4(), text }];
+            });
+        },
+        clearMessageById: (id: string): void => {
+            update((messages: Message[]) => {
+                messages = messages.filter((message) => message.id !== id);
+                return messages;
+            });
+        },
+    };
+}

front/src/Stores/TypeMessageStore/TextMessageStore.ts

@@ -1,5 +1,3 @@
-import { writable } from "svelte/store";
+import { createMessageStore } from "./MessageStore";
 
-export const textMessageVisibleStore = writable(false);
-
-export const textMessageContentStore = writable("");
+export const textMessageStore = createMessageStore();

front/src/WebRtc/ColorGenerator.ts

@@ -1,13 +1,29 @@
 export function getRandomColor(): string {
+    const { r, g, b } = getColorRgbFromHue(Math.random());
+    return toHexa(r, g, b);
+}
+
+function toHexa(r: number, g: number, b: number): string {
+    return "#" + Math.floor(r * 256).toString(16) + Math.floor(g * 256).toString(16) + Math.floor(b * 256).toString(16);
+}
+
+export function getColorRgbFromHue(hue: number): { r: number; g: number; b: number } {
     const golden_ratio_conjugate = 0.618033988749895;
-    let hue = Math.random();
     hue += golden_ratio_conjugate;
     hue %= 1;
     return hsv_to_rgb(hue, 0.5, 0.95);
 }
 
+function stringToDouble(string: string): number {
+    let num = 1;
+    for (const char of string.split("")) {
+        num *= char.charCodeAt(0);
+    }
+    return (num % 255) / 255;
+}
+
 //todo: test this.
-function hsv_to_rgb(hue: number, saturation: number, brightness: number): string {
+function hsv_to_rgb(hue: number, saturation: number, brightness: number): { r: number; g: number; b: number } {
     const h_i = Math.floor(hue * 6);
     const f = hue * 6 - h_i;
     const p = brightness * (1 - saturation);
@@ -48,5 +64,9 @@ function hsv_to_rgb(hue: number, saturation: number, brightness: number): string
         default:
             throw "h_i cannot be " + h_i;
     }
-    return "#" + Math.floor(r * 256).toString(16) + Math.floor(g * 256).toString(16) + Math.floor(b * 256).toString(16);
+    return {
+        r,
+        g,
+        b,
+    };
 }

front/tests/Phaser/Game/PlayerMovementTest.ts

@@ -1,22 +1,24 @@
 import "jasmine";
-import {PlayerMovement} from "../../../src/Phaser/Game/PlayerMovement";
+import { PlayerMovement } from "../../../src/Phaser/Game/PlayerMovement";
 
 describe("Interpolation / Extrapolation", () => {
     it("should interpolate", () => {
-        const playerMovement = new PlayerMovement({
-            x: 100, y: 200
-        }, 42000,
+        const playerMovement = new PlayerMovement(
+            {
+                x: 100,
+                y: 200,
+            },
+            42000,
             {
                 x: 200,
                 y: 100,
                 oldX: 100,
                 oldY: 200,
                 moving: true,
-                direction: "up"
+                direction: "up",
             },
             42200
-            );
-
+        );
 
         expect(playerMovement.isOutdated(42100)).toBe(false);
         expect(playerMovement.isOutdated(43000)).toBe(true);
@@ -26,8 +28,8 @@ describe("Interpolation / Extrapolation", () => {
             y: 150,
             oldX: 100,
             oldY: 200,
-            direction: 'up',
-            moving: true
+            direction: "up",
+            moving: true,
         });
 
         expect(playerMovement.getPosition(42200)).toEqual({
@@ -35,8 +37,8 @@ describe("Interpolation / Extrapolation", () => {
             y: 100,
             oldX: 100,
             oldY: 200,
-            direction: 'up',
-            moving: true
+            direction: "up",
+            moving: true,
         });
 
         expect(playerMovement.getPosition(42300)).toEqual({
@@ -44,22 +46,25 @@ describe("Interpolation / Extrapolation", () => {
             y: 50,
             oldX: 100,
             oldY: 200,
-            direction: 'up',
-            moving: true
+            direction: "up",
+            moving: true,
         });
     });
 
     it("should not extrapolate if we stop", () => {
-        const playerMovement = new PlayerMovement({
-                x: 100, y: 200
-            }, 42000,
+        const playerMovement = new PlayerMovement(
+            {
+                x: 100,
+                y: 200,
+            },
+            42000,
             {
                 x: 200,
                 y: 100,
                 oldX: 100,
                 oldY: 200,
                 moving: false,
-                direction: "up"
+                direction: "up",
             },
             42200
         );
@@ -69,22 +74,25 @@ describe("Interpolation / Extrapolation", () => {
             y: 100,
             oldX: 100,
             oldY: 200,
-            direction: 'up',
-            moving: false
+            direction: "up",
+            moving: false,
         });
     });
 
-    it("should should keep moving until it stops", () => {
-        const playerMovement = new PlayerMovement({
-                x: 100, y: 200
-            }, 42000,
+    it("should keep moving until it stops", () => {
+        const playerMovement = new PlayerMovement(
+            {
+                x: 100,
+                y: 200,
+            },
+            42000,
             {
                 x: 200,
                 y: 100,
                 oldX: 100,
                 oldY: 200,
                 moving: false,
-                direction: "up"
+                direction: "up",
             },
             42200
         );
@@ -94,8 +102,8 @@ describe("Interpolation / Extrapolation", () => {
             y: 150,
             oldX: 100,
             oldY: 200,
-            direction: 'up',
-            moving: true
+            direction: "up",
+            moving: false,
         });
     });
-})
+});

maps/tests/index.html

@@ -120,6 +120,14 @@
                         <a href="#" class="testLink" data-testmap="focusable_zone_map.json" target="_blank">Focusable Zones</a>
                     </td>
                 </tr>
+                <tr>
+                    <td>
+                        <input type="radio" name="test-layer-visibility"> Success <input type="radio" name="test-layer-visibility"> Failure <input type="radio" name="test-layer-visibility" checked> Pending
+                    </td>
+                    <td>
+                        <a href="#" class="testLink" data-testmap="layer-visibility.json" target="_blank">Layer visibility + Layer size and offset</a>
+                    </td>
+                </tr>
             </table>
             <h2>Iframe API</h2>
             <table class="table">

maps/tests/layer-visibility.json

@@ -0,0 +1,148 @@
+{ "compressionlevel":-1,
+ "height":9,
+ "infinite":false,
+ "layers":[
+        {
+         "data":[1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1],
+         "height":9,
+         "id":1,
+         "name":"floor",
+         "opacity":1,
+         "type":"tilelayer",
+         "visible":true,
+         "width":9,
+         "x":0,
+         "y":0
+        }, 
+        {
+         "data":[34, 34, 34, 0, 0, 0, 0, 0, 0, 34, 34, 34, 0, 0, 0, 0, 0, 0, 34, 34, 34, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0],
+         "height":9,
+         "id":7,
+         "name":"invisible",
+         "opacity":1,
+         "type":"tilelayer",
+         "visible":false,
+         "width":9,
+         "x":0,
+         "y":0
+        }, 
+        {
+         "data":[0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 12, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0],
+         "height":9,
+         "id":2,
+         "name":"start",
+         "opacity":1,
+         "type":"tilelayer",
+         "visible":true,
+         "width":9,
+         "x":0,
+         "y":0
+        }, 
+        {
+         "data":[78, 79, 80, 89, 90, 91, 100, 101, 102],
+         "height":3,
+         "id":9,
+         "name":"smaller-offset",
+         "opacity":1,
+         "type":"tilelayer",
+         "visible":true,
+         "width":3,
+         "x":3,
+         "y":3
+        }, 
+        {
+         "draworder":"topdown",
+         "id":3,
+         "name":"floorLayer",
+         "objects":[
+                {
+                 "height":113.62434712736,
+                 "id":2,
+                 "name":"",
+                 "rotation":0,
+                 "text":
+                    {
+                     "text":"The striped tiles in the top left corner should be invisible.",
+                     "wrap":true
+                    },
+                 "type":"",
+                 "visible":true,
+                 "width":108.583142912147,
+                 "x":4.76293503917236,
+                 "y":3.18514798446498
+                }, 
+                {
+                 "height":196.249229945092,
+                 "id":3,
+                 "name":"",
+                 "rotation":0,
+                 "text":
+                    {
+                     "text":"The striped tiles in the top right corner should be transparent and appear above the player.",
+                     "wrap":true
+                    },
+                 "type":"",
+                 "visible":true,
+                 "width":148.867058808759,
+                 "x":137.442726119928,
+                 "y":2.49946430962904
+                }, 
+                {
+                 "height":72.9975893933307,
+                 "id":4,
+                 "name":"",
+                 "rotation":0,
+                 "text":
+                    {
+                     "text":"The plant should be here (the center of the map)",
+                     "wrap":true
+                    },
+                 "type":"",
+                 "visible":true,
+                 "width":151.609793508102,
+                 "x":78.3025091653274,
+                 "y":173.920383018616
+                }],
+         "opacity":1,
+         "type":"objectgroup",
+         "visible":true,
+         "x":0,
+         "y":0
+        }, 
+        {
+         "data":[0, 0, 0, 0, 0, 0, 34, 34, 34, 0, 0, 0, 0, 0, 0, 34, 34, 34, 0, 0, 0, 0, 0, 0, 34, 34, 34, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0],
+         "height":9,
+         "id":8,
+         "name":"transparent",
+         "opacity":0.4,
+         "type":"tilelayer",
+         "visible":true,
+         "width":9,
+         "x":0,
+         "y":0
+        }],
+ "nextlayerid":10,
+ "nextobjectid":5,
+ "orientation":"orthogonal",
+ "renderorder":"right-down",
+ "tiledversion":"1.7.2",
+ "tileheight":32,
+ "tilesets":[
+        {
+         "columns":11,
+         "firstgid":1,
+         "image":"tileset1.png",
+         "imageheight":352,
+         "imagewidth":352,
+         "margin":0,
+         "name":"tileset1",
+         "spacing":0,
+         "tilecount":121,
+         "tileheight":32,
+         "tilewidth":32
+        }],
+ "tilewidth":32,
+ "type":"map",
+ "version":"1.6",
+ "width":9
+}

messages/JsonMessages/AdminApiData.ts

@@ -8,12 +8,10 @@ import { isCharacterTexture } from "./CharacterTexture";
 
 export const isAdminApiData = new tg.IsInterface()
     .withProperties({
-        roomUrl: tg.isString,
-        email: tg.isNullable(tg.isString),
-        mapUrlStart: tg.isString,
-        tags: tg.isArray(tg.isString),
-        policy_type: tg.isNumber,
         userUuid: tg.isString,
+        email: tg.isNullable(tg.isString),
+        roomUrl: tg.isString,
+        mapUrlStart: tg.isString,
         textures: tg.isArray(isCharacterTexture),
     })
     .withOptionalProperties({

messages/protos/messages.proto

@@ -71,12 +71,12 @@ message ReportPlayerMessage {
 }
 
 message EmotePromptMessage {
-    string emote = 2;
+  string emote = 2;
 }
 
 message EmoteEventMessage {
-    int32 actorUserId = 1;
-    string emote = 2;
+  int32 actorUserId = 1;
+  string emote = 2;
 }
 
 message QueryJitsiJwtMessage {
@@ -84,6 +84,20 @@ message QueryJitsiJwtMessage {
   string tag = 2; // FIXME: rather than reading the tag from the query, we should read it from the current map!
 }
 
+message FollowRequestMessage {
+  int32 leader = 1;
+}
+
+message FollowConfirmationMessage {
+  int32 leader = 1;
+  int32 follower = 2;
+}
+
+message FollowAbortMessage {
+  int32 leader = 1;
+  int32 follower = 2;
+}
+
 message ClientToServerMessage {
   oneof message {
     UserMovesMessage userMovesMessage = 2;
@@ -99,6 +113,9 @@ message ClientToServerMessage {
     QueryJitsiJwtMessage queryJitsiJwtMessage = 12;
     EmotePromptMessage emotePromptMessage = 13;
     VariableMessage variableMessage = 14;
+    FollowRequestMessage followRequestMessage = 15;
+    FollowConfirmationMessage followConfirmationMessage = 16;
+    FollowAbortMessage followAbortMessage = 17;
   }
 }
 
@@ -243,14 +260,14 @@ message SendUserMessage{
 message WorldFullWarningMessage{
 }
 message WorldFullWarningToRoomMessage{
-    string roomId = 1;
+  string roomId = 1;
 }
 message RefreshRoomPromptMessage{
-    string roomId = 1;
+  string roomId = 1;
 }
 message RefreshRoomMessage{
-    string roomId = 1;
-    int32 versionNumber = 2;
+  string roomId = 1;
+  int32 versionNumber = 2;
 }
 
 message WorldFullMessage{
@@ -292,6 +309,9 @@ message ServerToClientMessage {
     WorldConnexionMessage worldConnexionMessage = 18;
     //EmoteEventMessage emoteEventMessage = 19;
     TokenExpiredMessage tokenExpiredMessage = 20;
+    FollowRequestMessage followRequestMessage = 21;
+    FollowConfirmationMessage followConfirmationMessage = 22;
+    FollowAbortMessage followAbortMessage = 23;
   }
 }
 
@@ -378,6 +398,9 @@ message PusherToBackMessage {
     BanUserMessage banUserMessage = 13;
     EmotePromptMessage emotePromptMessage = 14;
     VariableMessage variableMessage = 15;
+    FollowRequestMessage followRequestMessage = 16;
+    FollowConfirmationMessage followConfirmationMessage = 17;
+    FollowAbortMessage followAbortMessage = 18;
   }
 }
 

pusher/Dockerfile

@@ -1,11 +1,11 @@
 # protobuf build
-FROM node:14.15.4-buster-slim@sha256:cbae886186467bbfd274b82a234a1cdfbbd31201c2a6ee63a6893eefcf3c6e76 as builder
+FROM node:14.18.2-buster-slim@sha256:20bedf0c09de887379e59a41c04284974f5fb529cf0e13aab613473ce298da3d as builder
 WORKDIR /usr/src
 COPY messages .
 RUN yarn install && yarn proto
 
 # typescript build
-FROM node:14.15.4-buster-slim@sha256:cbae886186467bbfd274b82a234a1cdfbbd31201c2a6ee63a6893eefcf3c6e76 as builder2
+FROM node:14.18.2-buster-slim@sha256:20bedf0c09de887379e59a41c04284974f5fb529cf0e13aab613473ce298da3d as builder2
 WORKDIR /usr/src
 COPY pusher/yarn.lock pusher/package.json ./
 RUN yarn install
@@ -16,7 +16,7 @@ ENV NODE_ENV=production
 RUN yarn run tsc
 
 # final production image
-FROM node:14.15.4-buster-slim@sha256:cbae886186467bbfd274b82a234a1cdfbbd31201c2a6ee63a6893eefcf3c6e76
+FROM node:14.18.2-buster-slim@sha256:20bedf0c09de887379e59a41c04284974f5fb529cf0e13aab613473ce298da3d
 WORKDIR /usr/src
 COPY pusher/yarn.lock pusher/package.json ./
 COPY --from=builder2 /usr/src/dist /usr/src/dist

pusher/src/Controller/IoSocketController.ts

@@ -17,6 +17,9 @@ import {
     ServerToClientMessage,
     CompanionMessage,
     EmotePromptMessage,
+    FollowRequestMessage,
+    FollowConfirmationMessage,
+    FollowAbortMessage,
     VariableMessage,
 } from "../Messages/generated/messages_pb";
 import { UserMovesMessage } from "../Messages/generated/messages_pb";
@@ -477,6 +480,18 @@ export class IoSocketController {
                         client,
                         message.getEmotepromptmessage() as EmotePromptMessage
                     );
+                } else if (message.hasFollowrequestmessage()) {
+                    socketManager.handleFollowRequest(
+                        client,
+                        message.getFollowrequestmessage() as FollowRequestMessage
+                    );
+                } else if (message.hasFollowconfirmationmessage()) {
+                    socketManager.handleFollowConfirmation(
+                        client,
+                        message.getFollowconfirmationmessage() as FollowConfirmationMessage
+                    );
+                } else if (message.hasFollowabortmessage()) {
+                    socketManager.handleFollowAbort(client, message.getFollowabortmessage() as FollowAbortMessage);
                 }
 
                 /* Ok is false if backpressure was built up, wait for drain */

pusher/src/Controller/PrometheusController.ts

@@ -1,12 +1,10 @@
 import { App } from "../Server/sifrr.server";
 import { HttpRequest, HttpResponse } from "uWebSockets.js";
-const register = require("prom-client").register;
-const collectDefaultMetrics = require("prom-client").collectDefaultMetrics;
+import { register, collectDefaultMetrics } from "prom-client";
 
 export class PrometheusController {
     constructor(private App: App) {
         collectDefaultMetrics({
-            timeout: 10000,
             gcDurationBuckets: [0.001, 0.01, 0.1, 1, 2, 5], // These are the default buckets.
         });
 

pusher/src/Services/AdminApi.ts

@@ -75,21 +75,6 @@ class AdminApi {
         return res.data;
     }
 
-    async fetchCheckUserByToken(organizationMemberToken: string): Promise<AdminApiData> {
-        if (!ADMIN_API_URL) {
-            return Promise.reject(new Error("No admin backoffice set!"));
-        }
-        //todo: this call can fail if the corresponding world is not activated or if the token is invalid. Handle that case.
-        const res = await Axios.get(ADMIN_API_URL + "/api/check-user/" + organizationMemberToken, {
-            headers: { Authorization: `${ADMIN_API_TOKEN}` },
-        });
-        if (!isAdminApiData(res.data)) {
-            console.error("Message received from /api/check-user is not in the expected format. Message: ", res.data);
-            throw new Error("Message received from /api/check-user is not in the expected format.");
-        }
-        return res.data;
-    }
-
     reportPlayer(
         reportedUserUuid: string,
         reportedUserComment: string,

pusher/src/Services/ClientEventsEmitter.ts

@@ -1,4 +1,4 @@
-const EventEmitter = require("events");
+import { EventEmitter } from "events";
 
 const clientJoinEvent = "clientJoin";
 const clientLeaveEvent = "clientLeave";

pusher/src/Services/SocketManager.ts

@@ -8,6 +8,9 @@ import {
     CharacterLayerMessage,
     EmoteEventMessage,
     EmotePromptMessage,
+    FollowRequestMessage,
+    FollowConfirmationMessage,
+    FollowAbortMessage,
     GroupDeleteMessage,
     ItemEventMessage,
     JoinRoomMessage,
@@ -271,6 +274,24 @@ export class SocketManager implements ZoneEventListener {
         this.handleViewport(client, viewport.toObject());
     }
 
+    handleFollowRequest(client: ExSocketInterface, message: FollowRequestMessage): void {
+        const pusherToBackMessage = new PusherToBackMessage();
+        pusherToBackMessage.setFollowrequestmessage(message);
+        client.backConnection.write(pusherToBackMessage);
+    }
+
+    handleFollowConfirmation(client: ExSocketInterface, message: FollowConfirmationMessage): void {
+        const pusherToBackMessage = new PusherToBackMessage();
+        pusherToBackMessage.setFollowconfirmationmessage(message);
+        client.backConnection.write(pusherToBackMessage);
+    }
+
+    handleFollowAbort(client: ExSocketInterface, message: FollowAbortMessage): void {
+        const pusherToBackMessage = new PusherToBackMessage();
+        pusherToBackMessage.setFollowabortmessage(message);
+        client.backConnection.write(pusherToBackMessage);
+    }
+
     onEmote(emoteMessage: EmoteEventMessage, listener: ExSocketInterface): void {
         const subMessage = new SubMessage();
         subMessage.setEmoteeventmessage(emoteMessage);

tests/README.md

@@ -14,7 +14,7 @@ You'll need to adapt the `ADMIN_API_TOKEN` to the value you use in your `.env` f
 Alternatively, you can use docker-compose to run the tests:
 
 ```console
-$ docker-compose -f docker-compose.testcafe.yml up --exit-code-from testcafe
+$ PROJECT_DIR=$(pwd) docker-compose -f docker-compose.testcafe.yml up --exit-code-from testcafe
 ```
 
 Note: by default, tests are running in Chrome locally and in Chromium in the Docker image.