Server heavy refactoring 1 (not functionnal)

server/traque-back/jsconfig.json

@@ -0,0 +1,13 @@
+{
+  "compilerOptions": {
+    "module": "NodeNext",
+    "moduleResolution": "NodeNext",
+    "target": "ESNext",
+    "checkJs": true,
+    "baseUrl": ".",
+    "paths": {
+      "@/*": ["src/*"]
+    }
+  },
+  "exclude": ["node_modules", "dist"]
+}

server/traque-back/src/core/game_manager.js

@@ -0,0 +1,140 @@
+import { Team } from "@/team/team.js";
+import { randint } from "@/util/util.js";
+import zoneManager from "./zone_manager.js"
+import { EventEmitter } from 'events';
+import { EVENTS } from "@/socket/playerHandler.js";
+import { DefaultState } from "@/states/default_state.js";
+import { CircularMap } from "@/util/circular_map.js";
+
+
+const isTeamNameValide = (teamName) => {
+    if (typeof teamName !== 'string') return false;
+    if (teamName.length === 0) return false;
+    return true;
+};
+
+const getNewTeamId = (teams) => {
+    const idLength = 6;
+    let newTeamId;
+    do {
+        newTeamId = randint(10 ** idLength);
+    } while (teams.has(newTeamId));
+    return newTeamId.toString().padStart(idLength, '0');
+};
+
+
+
+class GameManager extends EventEmitter {
+    constructor() {
+        super();
+        this.currentState = new DefaultState(this);
+        this.teams = new CircularMap();
+        this.settings = {
+            zone: zoneManager.settings,
+            scanDelay: 10 * 60 * 1000, // ms
+            outOfZoneDelay: 5 * 60 * 1000 // ms
+        }
+    }
+    
+
+    // State
+
+    setState(StateClass) {
+        this.currentState.exit();
+        this.currentState = new StateClass(this);
+        this.currentState.enter();
+    }
+
+
+    // Settings
+
+    setSettings(settings) {
+        // Zones
+        zoneManager.changeSettings(settings.zone);
+        this.settings.zone = zoneManager.settings; // TODO : not have two copies of the same object
+        // Delays
+        this.settings.scanDelay = settings.scanDelay;
+        this.settings.outOfZoneDelay = settings.outOfZoneDelay;
+    }
+
+
+    // Emits
+
+    emitTeamUpdate(target, team) {
+        this.emit(EVENTS.INTERNAL.TEAM_UPDATE, target, this.currentState.getTeamMapForTeam(team));
+    }
+
+    emitLogout(target) {
+        this.emit(EVENTS.INTERNAL.LOGOUT, target);
+    }
+
+
+    // Actions
+
+    //// Boilerplates
+
+    _performOnTeam(actionName, teamId, ...args) {
+        if (!this.teams.has(teamId)) return false;
+        const team = this.teams.get(teamId);
+        return this.currentState[actionName](team, ...args);
+    }
+
+    //// All states
+
+    addTeam(teamName) {
+        if (!isTeamNameValide(teamName)) return false;
+        const teamId = getNewTeamId(this.teams);
+        const team = new Team(teamId, teamName);
+        this.teams.set(teamId, team);
+        this.currentState.initTeamContext(team);
+        this.currentState.onTeamOrderChange();
+        return true;
+    }
+    
+    removeTeam(teamId) {
+        if (!this.teams.has(teamId)) return false;
+        this.emitLogout(teamId);
+        this.currentState.clearTeamContext(this.teams.get(teamId));
+        this.teams.delete(teamId);
+        this.currentState.onTeamOrderChange();
+        return true;
+    }
+
+    reorderTeam(newTeamsOrder) {
+        if (!this.teams.reorder(newTeamsOrder)) return false;
+        this.currentState.onTeamOrderChange();
+        return true;
+    }
+
+    updateLocation(teamId, coords) {
+        return this._performOnTeam("updateLocation", teamId, coords);
+    }
+
+    //// Playing state
+
+    eliminate(teamId) {
+        return this._performOnTeam("eliminate", teamId);
+    }
+
+    revive(teamId) {
+        return this._performOnTeam("revive", teamId);
+    }
+    
+    addHandicap(teamId) {
+        return this._performOnTeam("addHandicap", teamId);
+    }
+    
+    clearHandicap(teamId) {
+        return this._performOnTeam("clearHandicap", teamId);
+    }
+
+    scan(teamId, coords) {
+        return this._performOnTeam("updateLocation", teamId, coords) && this._performOnTeam("scan", teamId);
+    }
+
+    capture(teamId, captureCode) {
+        return this._performOnTeam("capture", teamId, captureCode);
+    }
+}
+
+export const gameManager = new GameManager();

server/traque-back/src/core/zone_manager.js

@@ -1,23 +1,11 @@
-import { playersBroadcast } from './team_socket.js';
-import { secureAdminBroadcast } from './admin_socket.js';
+import { haversineDistance, EARTH_RADIUS } from "./util.js";
 
 
 /* -------------------------------- Useful functions and constants -------------------------------- */
 
-const zoneTypes = {
-    circle: "circle",
-    polygon: "polygon"
-}
-
-const EARTH_RADIUS = 6_371_000; // Radius of the earth in m
-
-function haversine_distance({ lat: lat1, lng: lon1 }, { lat: lat2, lng: lon2 }) {
-    const degToRad = (deg) => deg * (Math.PI / 180);
-    const dLat = degToRad(lat2 - lat1);
-    const dLon = degToRad(lon2 - lon1);
-    const a = Math.sin(dLat / 2) * Math.sin(dLat / 2) + Math.cos(degToRad(lat1)) * Math.cos(degToRad(lat2)) * Math.sin(dLon / 2) * Math.sin(dLon / 2);
-    const c = 2 * Math.atan2(Math.sqrt(a), Math.sqrt(1 - a));
-    return c * EARTH_RADIUS;
+const ZONE_TYPES = {
+    CIRCLE: "circle",
+    POLYGON: "polygon"
 }
 
 function latlngEqual(latlng1, latlng2, epsilon = 1e-9) {
@@ -27,17 +15,17 @@ function latlngEqual(latlng1, latlng2, epsilon = 1e-9) {
 
 /* -------------------------------- Circle zones -------------------------------- */
 
-const defaultCircleSettings = {type: zoneTypes.circle, min: null, max: null, reductionCount: 4, duration: 10}
+const defaultCircleSettings = {type: ZONE_TYPES.CIRCLE, min: null, max: null, reductionCount: 4, duration: 10}
 
 function circleZone(center, radius, duration) {
     return {
-        type: zoneTypes.circle,
+        type: ZONE_TYPES.CIRCLE,
         center: center,
         radius: radius,
         duration: duration,
 
         isInZone(location) {
-            return haversine_distance(center, location) < this.radius;
+            return haversineDistance(center, location) < this.radius;
         }
     }
 }
@@ -46,7 +34,7 @@ function circleSettingsToZones(settings) {
     const {min, max, reductionCount, duration} = settings;
 
     if (!min || !max) return [];
-    if (haversine_distance(max.center, min.center) > max.radius - min.radius) return [];
+    if (haversineDistance(max.center, min.center) > max.radius - min.radius) return [];
 
     const zones = [circleZone(max.center, max.radius, duration)];
     const radiusReductionLength = (max.radius - min.radius) / reductionCount;
@@ -56,7 +44,7 @@ function circleSettingsToZones(settings) {
     for (let i = 1; i < reductionCount; i++) {
         radius -= radiusReductionLength;
         let new_center = null;
-        while (!new_center || haversine_distance(new_center, min.center) > radius - min.radius) {
+        while (!new_center || haversineDistance(new_center, min.center) > radius - min.radius) {
             const angle = Math.random() * 2 * Math.PI;
             const angularDistance = Math.sqrt(Math.random()) * radiusReductionLength / EARTH_RADIUS;
             const lat0Rad = center.lat * Math.PI / 180;
@@ -83,11 +71,11 @@ function circleSettingsToZones(settings) {
 
 /* -------------------------------- Polygon zones -------------------------------- */
 
-const defaultPolygonSettings = {type: zoneTypes.polygon, polygons: []}
+const defaultPolygonSettings = {type: ZONE_TYPES.POLYGON, polygons: []}
 
 function polygonZone(polygon, duration) {
     return {
-        type: zoneTypes.polygon,
+        type: ZONE_TYPES.POLYGON,
         polygon: polygon,
         duration: duration,
 
@@ -227,10 +215,10 @@ export default {
 
     changeSettings(settings) {
         switch (settings.type) {
-            case zoneTypes.circle:
+            case ZONE_TYPES.CIRCLE:
                 this.zones = circleSettingsToZones(settings);
                 break;
-            case zoneTypes.polygon:
+            case ZONE_TYPES.POLYGON:
                 this.zones = polygonSettingsToZones(settings);
                 break;
             default:
@@ -250,7 +238,5 @@ export default {
             end: this.getNextZone(),
             endDate:this.currentZone.endDate,
         };
-        playersBroadcast("current_zone", zone);
-        secureAdminBroadcast("current_zone", zone);
     },
 }

server/traque-back/src/index.js

@@ -1,30 +1,24 @@
 import { createServer } from "http";
 import express from "express";
 import { Server } from "socket.io";
-import { config } from "dotenv";
-import { initAdminSocketHandler } from "./admin_socket.js";
-import { initTeamSocket } from "./team_socket.js";
-import { initPhotoUpload } from "./photo.js";
+import { initAdminSocketHandler } from "@/socket/adminHandler.js";
+import { initPlayerSocketHandler } from "@/socket/playerHandler.js";
+import { initPhotoUpload } from "./services/photo.js";
+import { PORT, HOST } from "@/util/util.js";
 
-config();
-const HOST = process.env.HOST;
-const PORT = process.env.PORT;
+// --- Configuration ---
+const app = express();
+const httpServer = createServer(app);
+const io = new Server(httpServer, {
+    cors: { origin: "*", methods: ["GET", "POST"] }
+});
 
-export const app = express();
-
-const httpServer = createServer({}, app);
+// --- Initialization ---
+initPhotoUpload(app);
+initAdminSocketHandler(io);
+initPlayerSocketHandler(io);
 
+// --- Server Start ---
 httpServer.listen(PORT, HOST, () => {
-  console.log("Server running on http://" + HOST + ":" + PORT);
+    console.log(`Server running on http://${HOST}:${PORT}`);
 });
-
-export const io = new Server(httpServer, {
-  cors: {
-    origin: "*",
-    methods: ["GET", "POST"]
-  }
-});
-
-initAdminSocketHandler();
-initTeamSocket();
-initPhotoUpload();

server/traque-back/src/old/admin_socket.js

@@ -1,4 +1,3 @@
-import { io } from "./index.js";
 import { createHash } from "crypto";
 import { config } from "dotenv";
 import game from "./game.js"
@@ -16,7 +15,7 @@ export function secureAdminBroadcast(event, data) {
 
 let loggedInSockets = [];
 
-export function initAdminSocketHandler() {
+export function initAdminSocketHandler(io) {
     io.of("admin").on("connection", (socket) => {
         console.log("Connection of an admin");
         let loggedIn = false;

server/traque-back/src/old/game.js

@@ -409,11 +409,9 @@ export default {
         // Update of currentLocation
         team.currentLocation = location;
         team.lastCurrentLocationDate = dateNow;
+        // If hasHandicap
         if (this.state == GameState.PLAYING && team.hasHandicap) {
             team.lastSentLocation = team.currentLocation;
-        }
-        // Update of enemyLocation
-        if (this.state == GameState.PLAYING && enemyTeam.hasHandicap) {
             team.enemyLocation = enemyTeam.currentLocation;
         }
         // Update of ready

server/traque-back/src/old/team_socket.js

@@ -3,7 +3,6 @@ This file manages team access to the server via websocket.
 It receives messages, checks permissions, manages authentication and performs actions by calling functions from other modules.
 This module also exposes functions to send messages via socket to all teams
 */
-import { io } from "./index.js";
 import game from "./game.js";
 import zoneManager from "./zone_manager.js";
 
@@ -63,7 +62,7 @@ export function sendUpdatedTeamInformations(teamId) {
     });
 }
 
-export function initTeamSocket() {
+export function initTeamSocket(io) {
     io.of("player").on("connection", (socket) => {
         console.log("Connection of a player");
         let teamId = null;

server/traque-back/src/services/photo.js

@@ -1,11 +1,8 @@
-/*
-This module manages the handler for uploading photos, as well as serving the correct file on requests based on the team ID and current game state
-*/
-import { app } from "./index.js";
 import multer from "multer";
 import fs from "fs";
 import path from "path";
-import game from "./game.js";
+import { gameManager } from "@/core/game_manager.js"
+
 const UPLOAD_DIR = path.join(process.cwd(), "uploads");
 const IMAGES_DIR = path.join(process.cwd(), "assets", "images");
 const ALLOWED_MIME = [
@@ -22,7 +19,10 @@ const storage = multer.diskStorage({
     },
     // Save the file with the team ID as the filename
     filename: function (req, file, callback) {
-        callback(null, req.query.team);
+        const teamId = req.query.team;
+        if (typeof teamId === 'string') {
+            callback(null, teamId);
+        }
     }
 });
 
@@ -32,53 +32,55 @@ const upload = multer({
     fileFilter: function (req, file, callback) {
         if (ALLOWED_MIME.indexOf(file.mimetype) == -1) {
             callback(null, false);
-        } else if (!game.getTeam(req.query.team)) {
+        } else if (!gameManager.teams.get(req.query.team)) {
             callback(null, false);
         } else {
             callback(null, true);
         }
     }
-})
+});
 
-// Clean the uploads directory
-function clean() {
+const clean = () => {
     const files = fs.readdirSync(UPLOAD_DIR);
     for (const file of files) {
         const filePath = path.join(UPLOAD_DIR, file);
         fs.unlinkSync(filePath);
     }
-}
+};
 
-export function initPhotoUpload() {
+export const initPhotoUpload = (app) => {
     clean();
-    //App handler for uploading a photo and saving it to a file
+
+    // App handler for uploading a photo and saving it to a file
     app.post("/upload", upload.single('file'), (req, res) => {
         res.set("Access-Control-Allow-Origin", "*");
-        console.log("upload", req.query)
-        res.send("")
-    })
-    //App handler for serving the photo of a team given its secret ID
+        console.log("upload", req.query);
+        res.send("");
+    });
+
+    // App handler for serving the photo of a team given its secret ID
     app.get("/photo/my", (req, res) => {
-        let team = game.getTeam(req.query.team);
+        let team = gameManager.teams.get(req.query.team);
         if (team) {
             const imagePath = path.join(UPLOAD_DIR, team.id);
-            res.set("Content-Type", "image/png")
+            res.set("Content-Type", "image/png");
             res.set("Access-Control-Allow-Origin", "*");
             res.sendFile(fs.existsSync(imagePath) ? imagePath : path.join(IMAGES_DIR, "missing_image.jpg"));
         } else {
-            res.status(400).send("Team not found")
+            res.status(400).send("Team not found");
         }
-    })
-    //App handler for serving the photo of the team chased by the team given by its secret ID
+    });
+
+    // App handler for serving the photo of the team chased by the team given by its secret ID
     app.get("/photo/enemy", (req, res) => {
-        let team = game.getTeam(req.query.team);
+        let team = gameManager.teams.get(req.query.team);
         if (team) {
             const imagePath = path.join(UPLOAD_DIR, team.chasing);
-            res.set("Content-Type", "image/png")
+            res.set("Content-Type", "image/png");
             res.set("Access-Control-Allow-Origin", "*");
             res.sendFile(fs.existsSync(imagePath) ? imagePath : path.join(IMAGES_DIR, "missing_image.jpg"));
         } else {
-            res.status(400).send("Team not found")
+            res.status(400).send("Team not found");
         }
-    })
-}
+    });
+};

server/traque-back/src/socket/adminHandler.js

@@ -0,0 +1,124 @@
+import { createHash } from "crypto";
+import { gameManager } from "@/core/game_manager.js"
+import { ADMIN_PASSWORD_HASH } from "@/util/util.js";
+
+export const EVENTS = {
+    INTERNAL: {
+        TEAMS_UPDATE: "teams-update",
+        SETTINGS: "settings",
+    },
+    IN: {
+        LOGIN: "login",
+        LOGOUT: "logout",
+        STATE: "state",
+        SETTINGS: "settings",
+        ADD_TEAM: "add-team",
+        REMOVE_TEAM: "remove-team",
+        REORDER_TEAM: "reorder-team",
+        ELIMINATE_TEAM: "eliminate-team",
+        REVIVE_TEAM: "revive-team",
+    },
+    OUT: {
+        TEAMS_UPDATE: "teams-update", // TODO : Too big ? (Send only the changing teams ?)
+        SETTINGS: "settings",
+    },
+};
+
+const ADMIN_ROOM = "admin_room";
+
+export function initAdminSocketHandler(io) {
+
+    // Util
+
+    const emit = (targetId, event, data) => {
+        io.of("admin").to(targetId).emit(event, data);
+    };
+
+    const broadcast = (event, data) => {
+        io.of("admin").to(ADMIN_ROOM).emit(event, data);
+    };
+
+
+    // Admin events
+
+    io.of("admin").on("connection", (socket) => {
+        console.log("Connection of an admin");
+
+        // Variables
+
+        let loggedIn = false;
+
+
+        // Util
+
+        const logout = () => {
+            if (!loggedIn) return;
+            loggedIn = false;
+            socket.leave(ADMIN_ROOM);
+        }
+
+        const login = (password) => {
+            if (loggedIn) return;
+            if (createHash('sha256').update(password).digest('hex') !== ADMIN_PASSWORD_HASH) return false;
+            loggedIn = true;
+            socket.join(ADMIN_ROOM);
+        }
+
+
+        // Socket
+
+        socket.on("disconnect", () => {
+            console.log("Disconnection of an admin");
+            logout();
+        });
+
+
+        // Authentication
+
+        socket.on(EVENTS.IN.LOGIN, (password) => {
+            login(password);
+        });
+
+        socket.on(EVENTS.IN.LOGOUT, () => {
+            logout();
+        });
+
+        
+        // Actions
+
+        socket.on(EVENTS.IN.ADD_TEAM, (teamId) => {
+            if (!loggedIn) return;
+            gameManager.addTeam(teamId);
+        });
+
+        socket.on(EVENTS.IN.REMOVE_TEAM, (teamId) => {
+            if (!loggedIn) return;
+            gameManager.removeTeam(teamId);
+        });
+
+        socket.on(EVENTS.IN.REORDER_TEAM, (teamId) => {
+            if (!loggedIn) return;
+            gameManager.reorderTeam(teamId);
+        });
+
+        socket.on(EVENTS.IN.ELIMINATE_TEAM, (teamId) => {
+            if (!loggedIn) return;
+            gameManager.eliminate(teamId);
+        });
+
+        socket.on(EVENTS.IN.REVIVE_TEAM, (teamId) => {
+            if (!loggedIn) return;
+            gameManager.revive(teamId);
+        });
+
+        socket.on(EVENTS.IN.STATE, (state) => {
+            if (!loggedIn) return;
+            gameManager.setState(state);
+        });
+
+        socket.on(EVENTS.IN.SETTINGS, (settings) => {
+            if (!loggedIn) return;
+            gameManager.setSettings(settings);
+        });
+    });
+}

server/traque-back/src/socket/playerHandler.js

@@ -0,0 +1,111 @@
+import { gameManager } from "@/core/game_manager.js";
+
+export const EVENTS = {
+    INTERNAL: {
+        LOGOUT: "logout",
+        TEAM_UPDATE: "team-update",
+    },
+    IN: {
+        LOGIN: "login",
+        LOGOUT: "logout",
+        LOCATION: "location",
+        SCAN: "scan",
+        CAPTURE: "capture",
+        DEVICE: "device",
+    },
+    OUT: {
+        LOGOUT: "logout",
+        TEAM_UPDATE: "team-update",
+    },
+};
+
+export function initPlayerSocketHandler(io) {
+
+    // Util
+
+    const emit = (targetId, event, data) => {
+        io.of("player").to(targetId).emit(event, data);
+    };
+
+
+    // Game manager events
+
+    gameManager.on(EVENTS.INTERNAL.LOGOUT, (targetId) => {
+        emit(targetId, EVENTS.OUT.LOGOUT);
+    });
+
+    gameManager.on(EVENTS.INTERNAL.TEAM_UPDATE, (targetId, playTeamData) => {
+        emit(targetId, EVENTS.OUT.TEAM_UPDATE, playTeamData);
+    });
+
+
+    // Player events
+
+    io.of("player").on("connect", (socket) => {
+        console.log("Connection of a player");
+
+        // Variables
+
+        let teamId = null;
+
+
+        // Util
+
+        const isLoggedIn = () => {
+            return teamId !== null;
+        }
+
+        const logout = () => {
+            if (!isLoggedIn()) return;
+            socket.leave(teamId);
+            teamId = null;
+        }
+
+        const login = (loginTeamId) => {
+            if (!gameManager.teams.has(loginTeamId) || teamId === loginTeamId) return;
+            logout();
+            teamId = loginTeamId
+            socket.join(teamId);
+        }
+
+
+        // Socket
+
+        socket.on("disconnect", () => {
+            console.log("Disconnection of a player");
+            logout();
+        });
+
+
+        // Authentication
+
+        socket.on(EVENTS.IN.LOGIN, (loginTeamId, callback) => {
+            login(loginTeamId);
+            callback(isLoggedIn());
+            if (isLoggedIn()) gameManager.emitTeamUpdate(socket.id, gameManager.teams.get(teamId));
+        });
+
+        socket.on(EVENTS.IN.LOGOUT, () => {
+            logout();
+        });
+
+
+        // Actions
+
+        socket.on(EVENTS.IN.LOCATION, (coords) => {
+            if (!isLoggedIn()) return;
+            gameManager.updateLocation(teamId, coords);
+        });
+
+        socket.on(EVENTS.IN.SCAN, (coords) => {
+            if (!isLoggedIn()) return;
+            gameManager.scan(teamId, coords);
+        });
+
+        socket.on(EVENTS.IN.CAPTURE, (captureCode, callback) => {
+            if (!isLoggedIn()) return;
+            const success = gameManager.capture(teamId, captureCode);
+            callback(success);
+        });
+    });
+}

server/traque-back/src/states/default_state.js

@@ -0,0 +1,19 @@
+import { GameState } from "@/states/game_state.js";
+import { DefaultTeamMapper } from "@/team/mapper/default_team_mapper.js";
+
+export class DefaultState extends GameState {
+    constructor(manager) {
+        super(manager, new DefaultTeamMapper());
+    }
+
+    static get stateName () {
+        return "default";
+    }
+
+    // State functions
+
+    updateLocation(team, coords) {
+        team.updateLocation(coords);
+        return true;
+    }
+}

server/traque-back/src/states/finished_state.js

@@ -0,0 +1,19 @@
+import { GameState } from "@/states/game_state.js";
+import { FinishedTeamMapper } from "@/team/mapper/finished_team_mapper.js";
+
+export class FinishedState extends GameState {
+    constructor(manager) {
+        super(manager, new FinishedTeamMapper());
+    }
+
+    static get stateName () {
+        return "finished";
+    }
+
+    // State functions
+
+    updateLocation(team, coords) {
+        team.updateLocation(coords);
+        return true;
+    }
+}

server/traque-back/src/states/game_state.js

@@ -0,0 +1,36 @@
+export class GameState {
+    constructor(manager, teamMapper) {
+        this.manager = manager;
+        this.teamMapper = teamMapper;
+    }
+
+    // Life cycle
+
+    initTeamContext(_team) {}
+
+    enter() {
+        this.manager.teams.forEach(team => this.initTeamContext(team));
+    }
+
+    clearTeamContext(_team) {}
+
+    exit() {
+        this.manager.teams.forEach(team => this.clearTeamContext(team));
+    }
+
+
+    // Hooks
+
+    onTeamOrderChange() {}
+
+
+    // Mappers
+
+    getTeamMapForTeam(team) {
+        return this.teamMapper.mapForTeam(team);
+    }
+
+    getTeamMapForAdmin(team) {
+        return this.teamMapper.mapForAdmin(team);
+    }
+}

server/traque-back/src/states/placement_state.js

@@ -0,0 +1,36 @@
+import { haversineDistance } from "@/util/util.js";
+import { GameState } from "@/states/game_state.js";
+import { PlacementTeamMapper } from "@/team/mapper/placement_team_mapper.js";
+
+export class PlacementState extends GameState {
+    constructor(manager) {
+        super(manager, new PlacementTeamMapper());
+    }
+
+    static get stateName () {
+        return "placement";
+    }
+
+    // Life cycle
+
+    initTeamContext(team) {
+        team.context = {
+            placementZone: null,
+            isInPlacementZone: true,
+        };
+        this.manager.emitTeamUpdate(team.id, team);
+    }
+
+
+    // State functions
+
+    updateLocation(team, coords) {
+        team.updateLocation(coords);
+
+        team.context.isInPlacementZone = (
+            team.context.placementZone ? haversineDistance(team.location, team.context.placementZone.center) < team.context.placementZone.radius : true
+        );
+        
+        return true;
+    }
+}

server/traque-back/src/states/playing_state.js

@@ -0,0 +1,174 @@
+import zoneManager from "@/core/zone_manager.js";
+import { randint } from "@/util/util.js";
+import { GameState } from "@/states/game_state.js";
+import { FinishedState } from "./finished_state.js";
+import { TimeoutManager } from "@/util/timeout_manager.js";
+import { PlayingTeamMapper } from "@/team/mapper/playing_team_mapper.js";
+
+
+const getNewCaptureCode = () => {
+    const codeLength = 4;
+    return randint(10 ** codeLength).toString().padStart(codeLength, '0');
+};
+
+
+export class PlayingState extends GameState {
+    constructor(manager) {
+        super(manager, new PlayingTeamMapper());
+    }
+
+    static get stateName () {
+        return "playing";
+    }
+    
+    // Life cycle
+
+    initTeamContext(team) {
+        team.context = {
+            // Team
+            scanLocation: team.location,
+            captureCode: getNewCaptureCode(),
+            // Booleans
+            isEliminated: false,
+            isOutOfZone: false,
+            hasHandicap: false,
+            // Timeouts
+            scanTimeout: new TimeoutManager(() => this.scan(team.id), this.manager.settings.scanDelay, true),
+            outOfZoneTimeout: new TimeoutManager(() => this.addHandicap(team.id), this.manager.settings.outOfZoneDelay, true),
+            // Hunter and target
+            hunter: null,
+            target: null,
+            targetScanLocation: { coords: null, timesptamp: null },
+        };
+        this.manager.emitTeamUpdate(team.id, team);
+    }
+
+    enter() {
+        super.enter();
+        this.onTeamOrderChange();
+        zoneManager.start();
+    }
+
+    clearTeamContext(team) {
+        team.context.scanTimeout.clear();
+        team.context.outOfZoneTimeout.clear();
+    }
+
+    exit() {
+        super.exit();
+        zoneManager.stop();
+    }
+
+
+    // Hooks
+    
+    onTeamOrderChange() {
+        const playingTeamsOrder = this.manager.teams.order.filter(team => !team.context.isEliminated);
+        const length = playingTeamsOrder.length;
+        playingTeamsOrder.forEach((team, i) => {
+            const hunter = this.manager.teams.get(playingTeamsOrder[(i+length-1) % length]);
+            const target = this.manager.teams.get(playingTeamsOrder[(i+1) % length]);
+            let hasChanged = false;
+            if (!team.context.hunter.equals(hunter)) {
+                team.context.hunter = hunter;
+                hasChanged = true;
+            }
+            if (!team.context.target.equals(target)) {
+                team.context.target = target;
+                team.context.targetScanLocation = target.context.location;
+                hasChanged = true;
+            }
+            if (hasChanged) {
+                this.manager.emitTeamUpdate(team.id, team);
+            }
+        });
+
+        if (this.manager.teams.order.filter(team => !team.context.isEliminated).length <= 2) {
+            this.manager.setState(FinishedState);
+        }
+
+        return true;
+    }
+
+
+    // State functions
+
+    eliminate(team) {
+        if (team.context.isEliminated) return false;
+
+        this.clearTeamContext(team);
+        team.context.isEliminated = true;
+        this.onTeamOrderChange();
+
+        return true;
+    }
+
+    revive(team) {
+        if (!team.context.isEliminated) return false;
+
+        this.initTeamContext(team);
+        this.onTeamOrderChange();
+
+        return true;
+    }
+
+    addHandicap(team) {
+        if (team.context.hasHandicap) return false;
+
+        team.context.hasHandicap = true;
+        team.context.scanTimeout.clear();
+        this.manager.emitTeamUpdate(team.id, team);
+
+        return true;
+    }
+
+    clearHandicap(team) {
+        if (!team.context.hasHandicap) return false;
+
+        team.context.hasHandicap = false;
+        team.context.scanTimeout.set();
+        this.manager.emitTeamUpdate(team.id, team);
+
+        return true;
+    }
+
+    scan(team) {
+        if (team.context.hasHandicap || team.context.isEliminated) return false;
+
+        team.context.scanLocation = team.location;
+        team.context.targetScanLocation = team.context.target.context.scanLocation;
+        team.context.scanTimeout.set();
+        this.manager.emitTeamUpdate(team.id, team);
+
+        return true;
+    }
+
+    capture(team, captureCode) {
+        if (team.context.hasHandicap || team.context.isEliminated) return false;
+
+        if (captureCode != team.context.target.context.captureCode) return false;
+        this.eliminate(team.context.target);
+
+        return true;
+    }
+
+    updateLocation(team, coords) {
+        team.updateLocation(coords);
+
+        const isOutOfZone = !zoneManager.isInZone(team.location);
+        // Exit zone case 
+        if (isOutOfZone && !team.context.isOutOfZone) {
+            team.context.isOutOfZone = true;
+            team.context.outOfZoneTimeout.set();
+            this.manager.emitTeamUpdate(team.id, team);
+        // Enter zone case 
+        } else if (!isOutOfZone && team.context.isOutOfZone) {
+            team.context.isOutOfZone = false;
+            team.context.outOfZoneTimeout.clear();
+            this.clearHandicap(team);
+            this.manager.emitTeamUpdate(team.id, team);
+        }
+
+        return true;
+    }
+}

server/traque-back/src/team/mapper/default_team_mapper.js

@@ -0,0 +1,20 @@
+import { TeamMapper } from "./team_mapper.js";
+import { DefaultState } from "@/states/default_state.js";
+
+export class DefaultTeamMapper extends TeamMapper {
+    mapForTeam(team) {
+        return {
+            ...super.mapForTeam(team),
+            state: DefaultState.stateName,
+            context: {}
+        };
+    }
+
+    mapForAdmin(team) {
+        return {
+            ...super.mapForAdmin(team),
+            state: DefaultState.stateName,
+            context: {}
+        };
+    }
+}

server/traque-back/src/team/mapper/finished_team_mapper.js

@@ -0,0 +1,20 @@
+import { TeamMapper } from "./team_mapper.js";
+import { FinishedState } from "@/states/finished_state.js";
+
+export class FinishedTeamMapper extends TeamMapper {
+    mapForTeam(team) {
+        return {
+            ...super.mapForTeam(team),
+            state: FinishedState.stateName,
+            context: {}
+        };
+    }
+
+    mapForAdmin(team) {
+        return {
+            ...super.mapForAdmin(team),
+            state: FinishedState.stateName,
+            context: {}
+        };
+    }
+}

server/traque-back/src/team/mapper/placement_team_mapper.js

@@ -0,0 +1,26 @@
+import { TeamMapper } from "./team_mapper.js";
+import { PlacementState } from "@/states/placement_state.js";
+
+export class PlacementTeamMapper extends TeamMapper {
+    mapForTeam(team) {
+        return {
+            ...super.mapForTeam(team),
+            state: PlacementState.stateName,
+            context: {
+                placementZone: team.context.placementZone,
+                isInPlacementZone: team.context.isInPlacementZone,
+            }
+        };
+    }
+
+    mapForAdmin(team) {
+        return {
+            ...super.mapForAdmin(team),
+            state: PlacementState.stateName,
+            context: {
+                placementZone: team.context.placementZone,
+                isInPlacementZone: team.context.isInPlacementZone,
+            }
+        };
+    }
+}

server/traque-back/src/team/mapper/playing_team_mapper.js

@@ -0,0 +1,56 @@
+import { TeamMapper } from "./team_mapper.js";
+import { PlayingState } from "@/states/playing_state.js";
+import zoneManager from "@/core/zone_manager.js";
+
+export class PlayingTeamMapper extends TeamMapper {
+    mapForTeam(team) {
+        return {
+            ...super.mapForTeam(team),
+            state: PlayingState.stateName,
+            context: {
+                // Team
+                captureCode: team.context.captureCode,
+                scanLocation: team.context.scanLocation,
+                // Booleans
+                isEliminated: team.context.isEliminated,
+                isOutOfZone: team.context.isOutOfZone,
+                hasHandicap: team.context.hasHandicap,
+                // Timeouts
+                scanRemainingTime: team.context.scanTimeout.remainingTime,
+                outOfZoneRemainingTime: team.context.outOfZoneTimeout.remainingTime,
+                // Target
+                targetName: team.context.target?.name,
+                targetScanLocation: team.context.targetScanLocation,
+                targetHasHandicap: team.context.hunter?.context.hasHandicap,
+                // Zone
+                zoneType: zoneManager.settings.zoneType,
+                zoneCurrent: zoneManager.getCurrentZone(),
+                zoneNext: zoneManager.getNextZone(),
+                zoneRemainingTime: zoneManager.currentZone?.endDate ? Math.max(0, zoneManager.currentZone.endDate - Date.now()) : null
+            }
+        };
+    }
+
+    mapForAdmin(team) {
+        return {
+            ...super.mapForAdmin(team),
+            state: PlayingState.stateName,
+            context: {
+                // Team
+                captureCode: team.context.captureCode,
+                scanLocation: team.context.scanLocation,
+                // Booleans
+                isEliminated: team.context.isEliminated,
+                isOutOfZone: team.context.isOutOfZone,
+                hasHandicap: team.context.hasHandicap,
+                // Timeouts
+                scanRemainingTime: team.context.scanTimeout.remainingTime,
+                outOfZoneRemainingTime: team.context.outOfZoneTimeout.remainingTime,
+                // Target and hunter
+                hunterName: team.context.hunter.name,
+                targetName: team.context.target.name,
+                targetScanLocation: team.context.targetScanLocation,
+            }
+        };
+    }
+}

server/traque-back/src/team/mapper/team_mapper.js

@@ -0,0 +1,23 @@
+import { GameState } from "@/states/game_state.js";
+
+export class TeamMapper {
+    mapForTeam(team) {
+        return {
+            id: team.id,
+            name: team.name,
+            state: GameState.stateName,
+            context: {}
+        };
+    }
+
+    mapForAdmin(team) {
+        return {
+            id: team.id,
+            name: team.name,
+            location: team.location,
+            connectedPlayerCount: team.connectedPlayerCount,
+            state: GameState.stateName,
+            context: {}
+        };
+    }
+}

server/traque-back/src/team/team.js

@@ -0,0 +1,19 @@
+export class Team {
+    constructor(id, teamName) {
+        // Identity
+        this.id = id;
+        this.name = teamName;
+        // Location
+        this.location = { coords: null, timestamp: null };
+        // Context
+        this.context = {};
+    }
+
+    updateLocation(coords) {
+        this.location = { coords: coords, timestamp: Date.now()}
+    }
+
+    equals(team) {
+        return this.id === team.id;
+    }
+}

server/traque-back/src/util/circular_map.js

@@ -0,0 +1,33 @@
+export class CircularMap extends Map {
+    constructor(entries) {
+        super(entries);
+        this.order = Array.from(this.keys());
+    }
+
+    set(key, value) {
+        if (!super.has(key)) {
+            this.order.push(key);
+        }
+        return super.set(key, value);
+    }
+
+    delete(key) {
+        if (super.delete(key)) {
+            this.order = this.order.filter(k => k !== key);
+            return true;
+        }
+        return false;
+    }
+
+    clear() {
+        this.order = [];
+        super.clear();
+    }
+
+    reorder(newOrder) {
+        const isValid = newOrder.length === this.size && new Set([...this.order, ...newOrder]).size === this.size;
+        if (!isValid) return false;
+        this.order = newOrder;
+        return true;
+    }
+}

server/traque-back/src/util/timeout_manager.js

@@ -0,0 +1,26 @@
+export class TimeoutManager {
+    constructor(callback, delay, set = false) {
+        this.callback = callback;
+        this.delay = delay;
+        this.id = null;
+        this.date = null;
+        if (set) this.set();
+    }
+
+    get remainingTime() {
+        if (!this.id) return null;
+        return Math.max(0, this.date - Date.now());
+    }
+
+    set() {
+        if (this.id) clearTimeout(this.id);
+        this.id = setTimeout(this.callback, this.delay);
+        this.date = Date.now() + this.delay;
+    }
+
+    clear() {
+        if (this.id) clearTimeout(this.id);
+        this.id = null;
+        this.date = null;
+    }
+}

server/traque-back/src/util/util.js

@@ -0,0 +1,22 @@
+import { config } from "dotenv";
+
+config();
+
+export const ADMIN_PASSWORD_HASH = process.env.ADMIN_PASSWORD_HASH || "";
+export const HOST = process.env.HOST || "0.0.0.0";
+export const PORT = Number(process.env.PORT) || 3000;
+
+export const EARTH_RADIUS = 6_371_000; // Radius of the earth in meters
+
+export const randint = (max) => {
+    return Math.floor(Math.random() * max);
+}
+
+export const haversineDistance = ({ lat: lat1, lng: lon1 }, { lat: lat2, lng: lon2 }) => {
+    // Return the distance in meters between the two points of coordinates
+    const degToRad = (deg) => deg * (Math.PI / 180);
+    const dLat = degToRad(lat2 - lat1);
+    const dLon = degToRad(lon2 - lon1);
+    const a = Math.sin(dLat / 2) * Math.sin(dLat / 2) + Math.cos(degToRad(lat1)) * Math.cos(degToRad(lat2)) * Math.sin(dLon / 2) * Math.sin(dLon / 2);
+    return 2 * EARTH_RADIUS * Math.atan2(Math.sqrt(a), Math.sqrt(1 - a));
+}