Upload folder using huggingface_hub

.gitattributes

@@ -33,3 +33,4 @@ saved_model/**/* filter=lfs diff=lfs merge=lfs -text
 *.zip filter=lfs diff=lfs merge=lfs -text
 *.zst filter=lfs diff=lfs merge=lfs -text
 *tfevents* filter=lfs diff=lfs merge=lfs -text
+backend/engine/stockfish16 filter=lfs diff=lfs merge=lfs -text

.github/workflows/main.yml

@@ -0,0 +1,19 @@
+name: Sync to Hugging Face hub
+on:
+  push:
+    branches: [main]
+  # to run this workflow manually from the Actions tab
+  workflow_dispatch:
+
+jobs:
+  sync-to-hub:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
+        with:
+          fetch-depth: 0
+          lfs: true
+      - name: Push to hub
+        env:
+          HF_TOKEN: ${{ secrets.HF_TOKEN }}
+        run: git push https://ilhamdev:$HF_TOKEN@huggingface.co/spaces/ilhamdev/chessGame main

README.md

@@ -1,11 +1,84 @@
----
-title: ChessGame
-emoji: 🦀
-colorFrom: yellow
-colorTo: yellow
-sdk: docker
-pinned: false
-license: other
----
-
-Check out the configuration reference at https://huggingface.co/docs/hub/spaces-config-reference
+# ChessHub
+ChessHub is a web application for chess enthusiasts that allows players to compete against each other.
+
+![Capture](https://github.com/moonpatel/ChessHub/assets/95487062/d4bc47fe-9364-43e6-8a6e-081daee55d98)
+
+
+## Technologies used
+<p>
+<a href="https://react.dev/"><img src="https://img.shields.io/badge/React-20232A?style=for-the-badge&logo=react&logoColor=61DAFB" /></a>
+<a href="https://www.mongodb.com/"><img src="https://img.shields.io/badge/MongoDB-4EA94B?style=for-the-badge&logo=mongodb&logoColor=white" /></a>
+<a href="https://nodejs.org/en"><img src="https://img.shields.io/badge/Node%20js-339933?style=for-the-badge&logo=nodedotjs&logoColor=white" /></a>
+<a href="https://expressjs.com/"><img src="https://img.shields.io/badge/Express%20js-000000?style=for-the-badge&logo=express&logoColor=white" /></a>
+<a href="https://socket.io/"><img src="https://img.shields.io/badge/Socket.io-010101?&style=for-the-badge&logo=Socket.io&logoColor=white" /></a>
+</p>
+
+## Features
+1. Play chess with your friends
+2. Play with computer with customizable ELO
+3. View your game history
+4. Make friends
+5. Analyze your games
+
+## How to contribtute to this repository ?
+You can contribute to this repository by checking out existing issues or creating your own in the issue section (if you experience any bugs in the application or you want to propose a new feature).
+
+### Setting up the project locally
+1. Make sure to star the repository before going ahead.
+2. Fork the repo. (Click on the fork button in the top right corner).
+3. Clone the forked repo to your local machine.
+```
+git clone https://github.com/moonpatel/ChessHub.git 
+```
+4. Change the present working directory.
+```
+cd ChessHub
+```
+5. Create a new branch.
+```
+git checkout -b new-branch
+```
+6. Create a .env file in both frontend and backend directory according to the .env.example files with the required environment variables. The stockfish chess engine binary in the repo is for Linux systems only. If you are not using Linux then download the required stockfish chess engine binary from <a href="https://stockfishchess.org/download/">stockfish</a> website and place it in backend/engine directory. Also add the path of the engine to the CHESS_ENGINE_PATH variable in .env file in backend directory.
+7. Install the dependencies for frontend.
+```
+cd frontend
+npm install
+```
+8. Install the dependencies in the backend.
+```
+cd backend
+npm install
+```
+9. Start the frontend
+```
+cd frontend
+npm run dev
+```
+10. Start the backend
+```
+cd backend
+npm run dev
+```
+11. Visit http://localhost:5173 in your browser to view the application.
+
+### Setting up project using docker (Recommended)
+There is an alternative option to set up the project using docker. Make sure you have docker and docker-compose installed on your system.
+1. Fork the repo. (Click on the fork button in the top right corner).
+2. Clone the forked repo to your local machine.
+```
+git clone https://github.com/moonpatel/ChessHub.git 
+```
+3. Change the present working directory.
+```
+cd ChessHub
+```
+4. Add .env files to both your frontend and backend directories based on their respective .env.example templates (can be found inside the directories itself).
+5. Build the docker images for frontend and backend.
+```
+docker-compose build
+```
+6. Run the docker containers.
+```
+docker-compose up
+```
+7. Visit the website from your browser -> http://localhost:5173

backend/.dockerignore

@@ -0,0 +1 @@
+node_modules

backend/.env.example

@@ -0,0 +1,22 @@
+# use email only if you want to send emails
+# email id used for sending mails
+EMAIL_ID=
+MAIL_SERVER_PASSWORD=
+
+# host that are allowed in backend
+CORS_ALLOWED_HOST=http://localhost:5173
+
+# connection string to connect to MongoDB database. Can be local or MongoDB Atlas
+CONNECTION_STRING=
+
+PORT=8080
+
+# path to the chess engine
+CHESS_ENGINE_PATH=./engine/stockfish16.exe
+
+# hostname
+HOSTNAME=http://localhost:8080
+# can be PROD or DEV
+# DEV - development mode
+# PROD - same as DEV but serves frontend statics files from ../frontend/dist using the / endpoint
+MODE=DEV

backend/.gitignore

@@ -0,0 +1,4 @@
+node_modules
+_test_
+.env
+engine/stockfish

backend/app.js

@@ -0,0 +1,74 @@
+const path = require("path");
+
+const express = require("express");
+const bodyParser = require("body-parser");
+const cors = require("cors");
+const authRoutes = require("./routes/auth");
+const userRoutes = require("./routes/user");
+const roomRoutes = require("./routes/room");
+const mongoose = require("mongoose");
+const cookieParser = require("cookie-parser");
+require("dotenv").config();
+
+const MODE = process.env.MODE || "DEV"
+const port = process.env.PORT;
+
+mongoose
+    .connect(process.env.CONNECTION_STRING)
+    .then((res) => console.log("Connected to MongoDB"))
+    .catch((err) => console.log("Error in connecting to database"));
+
+const app = express();
+const http = require("http");
+const server = http.createServer(app);
+const { socketIOServerInit } = require("./socket");
+
+app.get("/health-check", (req, res, next) => {
+    res.status(200).send("OK");
+});
+app.use(cors({ origin: process.env.CORS_ALLOWED_HOST, credentials: true }));
+app.use(bodyParser.json());
+app.use((req, res, next) => {
+    // res.setHeader("Access-Control-Allow-Origin", "http://localhost:5173");
+    // res.setHeader("Access-Control-Allow-Methods", "GET,POST,PATCH,DELETE");
+    // res.setHeader("Access-Control-Allow-Headers", "Content-Type,Authorization");
+    next();
+});
+app.use(cookieParser());
+
+socketIOServerInit(server);
+
+app.use((req, res, next) => {
+    console.log(req.url);
+    next();
+});
+
+// app.use("/", (req, res, next) => res.send('Hello'));
+app.use("/api/auth", authRoutes);
+app.use("/api/user", userRoutes);
+app.use("/api/room", roomRoutes);
+
+if (MODE=="PROD") {
+    console.log('Hello')
+    app.use(express.static('../frontend/dist'));
+    app.get("/*", (req,res,next) => {
+        try {
+            res.sendFile(path.join(__dirname,"../frontend/dist/index.html"))
+        } catch(err) {
+            next(err)
+        }
+    })
+}
+
+app.use((error, req, res, next) => {
+    const status = error.status || 500;
+    console.log(error);
+    res.status(status).json({
+        message: "Something went wrong",
+        description: error?.message || "Internal server error",
+    });
+});
+
+server.listen(port, () => {
+    console.log("Listening on server", port);
+});

backend/chessbot.js

@@ -0,0 +1,28 @@
+const path = require("path");
+const { Engine } = require("node-uci");
+
+require("dotenv").config();
+const engine = new Engine(path.join(__dirname, process.env.CHESS_ENGINE_PATH || "engine/stockfish16.exe"));
+
+engine
+    .init()
+    .then((eng) => {
+        return eng.setoption("UCI_LimitStrength", true);
+    })
+    .then((eng) => {
+        eng.setoption("UCI_Elo");
+    })
+    .catch((err) => {
+        console.error(err);
+    });
+
+const nextMove = async ({ position }) => {
+    await engine.isready();
+    console.log("Chess engine ready");
+    engine.position(position);
+    const result = await engine.go({ depth: 10 });
+    console.log("Best move or position", position, "is", result.bestmove);
+    return result.bestmove;
+};
+
+module.exports = { nextMove };

backend/constants.js

@@ -0,0 +1,16 @@
+const SOCKET_EVENTS = {
+    CONNECTION: "connection",
+    JOIN_ROOM: "join-room",
+    JOIN_ROOM_SUCCESS: "join-room-success",
+    JOIN_ROOM_ERROR: "join-room-error",
+    ROOM_FULL: "room-full",
+    CHESS_MOVE: "move",
+    CHESS_OPPONENT_MOVE: "opponent-move",
+    USER_JOINED_ROOM: "user-joined-room",
+    USER_RESIGNED: "user-resigned",
+    GAME_END: "game-end",
+};
+
+module.exports = {
+    SOCKET_EVENTS,
+};

backend/dockerfile

@@ -0,0 +1,23 @@
+#  Dockerfile for Node Express Backend
+
+FROM node
+
+# Create App Directory
+RUN mkdir -p /usr/src/app
+WORKDIR /usr/src/app
+RUN npm install -g nodemon
+
+# Install Dependencies
+COPY package*.json ./
+
+RUN npm install --silent
+
+# Copy app source code
+COPY . .
+
+RUN chmod +x ./engine/stockfish16
+
+# Exports
+EXPOSE 8080
+
+CMD ["node","app.js"]

backend/engine/stockfish16

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:8f60a016dc767e0d648a8665b8ede3e6e4d28c086ad90517ad26f55b9960bd84
+size 40442144

backend/mail.js

@@ -0,0 +1,30 @@
+const nodemailer = require("nodemailer");
+require("dotenv").config();
+
+const transporter = nodemailer.createTransport({
+    service: "gmail",
+    auth: {
+        user: process.env.EMAIL_ID,
+        pass: process.env.MAIL_SERVER_PASSWORD,
+    },
+});
+
+const sendEmail = (receiverEmail, subject, data) => {
+    let mailDetails = {
+        from: process.env.EMAIL_ID,
+        to: receiverEmail,
+        subject: subject,
+        text: data,
+    };
+    transporter.sendMail(mailDetails, function (err, data) {
+        if (err) {
+            console.log(err);
+        } else {
+            console.log("Email sent successfully");
+        }
+    });
+};
+
+module.exports = {
+    sendEmail,
+};

backend/models/challenge.js

@@ -0,0 +1,30 @@
+const { Schema, default: mongoose } = require("mongoose");
+const { String, ObjectId, Number } = Schema.Types;
+
+const challengeSchema = new Schema({
+    challenger: {
+        type: String,
+        required: true,
+    },
+    challenged: {
+        type: String,
+        required: true,
+    },
+    color: {
+        type: String,
+        enum: ["b", "w"],
+        required: true,
+    },
+    timeLimit: {
+        type: Number,
+        required: true,
+    },
+    roomID: {
+        type: String,
+        required: true,
+        // unique: true,
+    },
+});
+
+const Challenge = mongoose.model("Challenge", challengeSchema);
+module.exports = { Challenge };

backend/models/game.js

@@ -0,0 +1,32 @@
+const { Schema, default: mongoose } = require("mongoose");
+const { String, ObjectId, Number } = Schema.Types;
+
+const gameSchema = new Schema({
+    white: {
+        type: ObjectId,
+        ref: "User",
+    },
+    black: {
+        type: ObjectId,
+        ref: "User",
+    },
+    timeLimit: {
+        type: Number,
+        required: true,
+    },
+    roomID: {
+        type: String,
+        required: true,
+    },
+    pgn: {
+        type: String,
+        required: true,
+    },
+    winner: {
+        type: String,
+        enum: ["b", "w", "n"],
+    },
+});
+
+const Game = mongoose.model("Game", gameSchema);
+module.exports = { Game };

backend/models/user.js

@@ -0,0 +1,87 @@
+const { Schema, default: mongoose } = require("mongoose");
+const { String, ObjectId } = Schema.Types;
+
+const userSchema = new Schema(
+    {
+        username: {
+            type: String,
+            unique: true,
+            required: true,
+        },
+        email: {
+            type: String,
+            unique: true,
+            required: true,
+        },
+        password_hash: {
+            type: String,
+            required: true,
+        },
+        fname: String,
+        lname: String,
+        location: String,
+        country: String,
+        friends: [
+            {
+                type: ObjectId,
+                ref: "User",
+            },
+        ],
+        games: [
+            {
+                type: ObjectId,
+                ref: "Game",
+            },
+        ],
+    },
+    {
+        virtuals: {
+            fullName: {
+                get() {
+                    return this.fname + " " + this.lname;
+                },
+            },
+            _friends_: {
+                async get() {
+                    await this.populate("friends", "username email");
+                    // console.log(this.friends);
+                    return this.friends.map((friend) => {
+                        return {
+                            username: friend.username,
+                            email: friend.email,
+                            id: friend.id,
+                        };
+                    });
+                },
+            },
+            _games_: {
+                async get() {
+                    await this.populate("games");
+                    return this.games;
+                },
+            },
+        },
+        methods: {
+            async getFriends() {
+                await this.populate("friends", "username email");
+                // console.log(this.friends);
+                return this.friends.map((friend) => {
+                    return {
+                        username: friend.username,
+                        email: friend.email,
+                        id: friend.id,
+                    };
+                });
+            },
+            async getGames() {
+                await this.populate("games");
+                return this.games;
+            },
+        },
+    }
+);
+
+userSchema.index({ username: "text" });
+
+const User = mongoose.model("User", userSchema);
+module.exports = { User };

backend/package-lock.json

@@ -0,0 +1,1547 @@
+{
+  "name": "backend-api",
+  "version": "1.0.0",
+  "lockfileVersion": 3,
+  "requires": true,
+  "packages": {
+    "": {
+      "name": "backend-api",
+      "version": "1.0.0",
+      "license": "ISC",
+      "dependencies": {
+        "bcryptjs": "^2.4.3",
+        "body-parser": "^1.20.2",
+        "chess.js": "^1.0.0-beta.6",
+        "cookie-parser": "^1.4.6",
+        "cors": "^2.8.5",
+        "dotenv": "^16.3.1",
+        "express": "^4.18.2",
+        "jsonwebtoken": "^8.5.1",
+        "mongoose": "^7.2.1",
+        "node-uci": "^1.3.4",
+        "nodemailer": "^6.9.3",
+        "socket.io": "^4.6.1",
+        "uuid": "^9.0.0",
+        "zod": "^3.21.4"
+      }
+    },
+    "node_modules/@babel/code-frame": {
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+    },
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+      "funding": {
+        "url": "https://github.com/sponsors/colinhacks"
+      }
+    }
+  }
+}

backend/package.json

@@ -0,0 +1,29 @@
+{
+  "name": "backend-api",
+  "version": "1.0.0",
+  "description": "",
+  "main": "index.js",
+  "scripts": {
+    "start": "export MODE=PROD && node app.js",
+    "dev": "export MODE=DEV && nodemon app.js"
+  },
+  "keywords": [],
+  "author": "",
+  "license": "ISC",
+  "dependencies": {
+    "bcryptjs": "^2.4.3",
+    "body-parser": "^1.20.2",
+    "chess.js": "^1.0.0-beta.6",
+    "cookie-parser": "^1.4.6",
+    "cors": "^2.8.5",
+    "dotenv": "^16.3.1",
+    "express": "^4.18.2",
+    "jsonwebtoken": "^8.5.1",
+    "mongoose": "^7.2.1",
+    "node-uci": "^1.3.4",
+    "nodemailer": "^6.9.3",
+    "socket.io": "^4.6.1",
+    "uuid": "^9.0.0",
+    "zod": "^3.21.4"
+  }
+}

backend/routes/auth.js

@@ -0,0 +1,120 @@
+const express = require("express");
+const {
+    createJSONToken,
+    isValidPassword,
+    validateJSONToken,
+    generatePasswordHash,
+    checkAuth,
+} = require("../util/auth");
+const { isValidEmail, isValidText } = require("../util/validation");
+const { User } = require("../models/user");
+const { z, ZodError } = require("zod");
+
+const router = express.Router();
+
+const loginSchema = z
+    .object({
+        username: z
+            .string()
+            .min(5, { message: "Username should not be less than 5 characters" })
+            .max(15, { message: "Username should not be more than 15 characters" }),
+        password: z
+            .string()
+            .min(8, { message: "Password should not be less than 8 characters" })
+            .max(15, { message: "Password should not be more than 15 characters" }),
+    })
+    .required();
+
+const signupSchema = z
+    .object({
+        username: z
+            .string()
+            .min(5, { message: "Username should not be less than 5 characters" })
+            .max(15, { message: "Username should not be more than 15 characters" }),
+        email: z.string().email({ message: "Please enter a valid email address" }),
+        password: z
+            .string()
+            .min(8, { message: "Password should not be less than 8 characters" })
+            .max(15, { message: "Password should not be more than 15 characters" }),
+    })
+    .required();
+
+router.post("/signup", async (req, res, next) => {
+    try {
+        const data = { email: req.body.email, password: req.body.password, username: req.body.username };
+
+        signupSchema.parse(data);
+
+        // check if username or email already exists
+        if (await User.findOne({ username: data.username }))
+            return res.status(409).json({ error: { username: "username already taken" } });
+        if (await User.findOne({ email: data.email }))
+            return res.status(409).json({ error: { email: "user with this email already exists" } });
+
+        let userData = {
+            email: data.email,
+            username: data.username,
+            password_hash: await generatePasswordHash(data.password),
+        };
+        let userDoc = await User.create(userData);
+        const authToken = createJSONToken(userDoc.id);
+
+        const { id, username, email } = userDoc;
+        res.setHeader('Host',process.env.HOSTNAME).status(201).cookie("auth-token", authToken, { httpOnly: true, sameSite: "strict" }).json({
+            user: { id, username, email },
+            token: authToken,
+        });
+    } catch (err) {
+        if (err instanceof ZodError) {
+            return res.status(400).json({ message: "Invalid data submitted", description: "Invalid schema" });
+        }
+        next(err);
+    }
+});
+
+router.post("/login", async (req, res, next) => {
+    try {
+        let username = req.body.username,
+            password = req.body.password;
+
+        loginSchema.parse({ username, password });
+
+        let user;
+        user = await User.findOne({ username });
+        if (!user)
+            return res.status(404).json({
+                message: "User does not exist",
+                description: "'username' not found in db",
+            });
+
+        const pwIsValid = await isValidPassword(password, user.password_hash);
+        if (!pwIsValid) {
+            return res.status(401).json({
+                message: "Invalid credentials",
+                description: "Invalid credentials",
+            });
+        }
+
+        const token = createJSONToken(user.id);
+        res.cookie("auth-token", token, { httpOnly: true, sameSite: "strict" });
+        return res.setHeader('Host',process.env.HOSTNAME)
+            .status(200)
+            .json({ token, user: { id: user.id, username: user.username, email: user.email } });
+    } catch (error) {
+        if (error instanceof ZodError) {
+            return res.status(401).json({ message: "Invalid Credentials", description: "Invalid schema" });
+        }
+        next(error);
+    }
+});
+
+router.delete("/logout", checkAuth, (req, res, next) => {
+    try {
+        res.setHeader('Host',process.env.HOSTNAME).clearCookie("auth-token", { httpOnly: true, sameSite: "strict" });
+        res.status(200).json({});
+    } catch (err) {
+        next(err);
+    }
+});
+
+module.exports = router;

backend/routes/public.js

@@ -0,0 +1,102 @@
+const router = require("express").Router();
+const { Challenge } = require("../models/challenge");
+const { User } = require("../models/user");
+
+// API endpoints that are publically accessible and does not require authentication
+
+// get all users
+router.get("/users", async (req, res, next) => {
+  try {
+    const users = await User.find();
+    return res.status(200).json(users);
+  } catch (err) {
+    next(err);
+  }
+});
+
+// TO BE TESTED
+// get user details
+router.get("/users/:username", async (req, res, next) => {
+  try {
+    let username = req.params.username;
+    const user = await User.findOne({ username });
+    let { id, email, fname, lname, country, location } = user;
+    let friends = await user.getFriends();
+    let games = await user.getGames();
+    return res.status(200).json({
+      id,
+      username,
+      email,
+      friends,
+      fname,
+      lname,
+      country,
+      location,
+      games,
+    });
+  } catch (err) {
+    next(err);
+  }
+});
+
+// TO BE TESTED
+// get friends of given user
+router.get("/users/:username/friends", async (req, res, next) => {
+  try {
+    const user = await User.findOne({ username: req.params.username });
+    const friends = await user.getFriends();
+    return res.json({ friends });
+  } catch (err) {
+    next(err);
+  }
+});
+
+// IS IT REQUIRED?
+// TO BE TESTED
+// get current challenges of the user
+router.get("/users/:username/challenges", checkAuth, async (req, res, next) => {
+  try {
+    let { userId } = req;
+    const user = await User.findById(userId);
+    let challenges = await Challenge.find({ challenged: user.username });
+    if (!challenges) challenges = [];
+    console.log("Challenges to", user.username, challenges);
+    res.json({ challenges: challenges });
+  } catch (err) {
+    next(err);
+  }
+});
+
+// TO BE TESTED
+// get history of games played
+router.get("/users/:username/games", async (req, res, next) => {
+  try {
+    const user = await User.findOne({ username: req.params.username });
+    let gamesData = await user.getGames();
+    if (!gamesData) gamesData = [];
+    return res.status(200).json(gamesData);
+  } catch (err) {
+    next(err);
+  }
+});
+
+// TO BE TESTED
+// get a particular game
+router.get(
+  "/users/:username/games/:gameid",
+  async (req, res, next) => {
+    try {
+      const { gameid } = req.params;
+      const gameData = await Game.findById(gameid);
+      if (gameData) {
+        return res.status(200).json(gameData);
+      } else {
+        return res.status(404).json({ error: { message: "Game not found" } });
+      }
+    } catch (err) {
+      next(err);
+    }
+  }
+);
+
+module.exports = router;

backend/routes/room.js

@@ -0,0 +1,54 @@
+const router = require("express").Router();
+const uuid = require("uuid");
+const { createRoom } = require("../socket");
+const { checkAuth } = require("../util/auth");
+const { Challenge } = require("../models/challenge");
+
+// async function fetchChallenge({ challenger, challenged }) {}
+
+// rooms can only be created through HTTP requests and destroyed only by socket.io server
+// and vice versa is not true
+router.post("/", checkAuth, async (req, res, next) => {
+    console.log(req.body);
+    // challenger and challenged are username, color is the color played by challenger, timeLimit is the timeLimit for one player
+    const { challenger, challenged, color, timeLimit } = req.body;
+
+    let challenge = await Challenge.findOne({ challenger });
+    // a user can create only one challenge at a time
+    if (challenge) {
+        return res.status(405).json({
+            message: "Cannot create new challenge",
+            description: "User already created a challenge",
+        });
+    }
+
+    // get email of the challenged person
+    // const challengedEmail = (await User.findOne({ username: challenged })).email;
+    // console.log(challengedEmail);
+
+    const roomID = uuid.v4();
+    createRoom(roomID, timeLimit);
+
+    challenge = await Challenge.create({ challenger, challenged, color, timeLimit, roomID });
+
+    // if (pendingChallenges.has(challenged)) {
+    //     let challenges = pendingChallenges.get(challenged);
+    //     challenges.push({ challenger, roomID, color, timeLimit });
+    // } else {
+    //     // color is the choosed by the challenger
+    //     pendingChallenges.set(challenged, [{ challenger, roomID, color, timeLimit }]);
+    // }
+
+    console.log("Pending challenge:", challenge);
+
+    // STOP SENDING EMAILS FOR NOW
+    // sendEmail(
+    //     challengedEmail,
+    //     `Challenge from ${challenger}`,
+    //     `To accept the challenge follow the link: http://192.168.136.99:5173/game/challenges/${challenged}/${roomID} \n login through: http://192.168.136.99:5173/login \n roomid:${roomID}`
+    // );
+    console.log(roomID);
+    res.status(201).json({ roomID });
+});
+
+module.exports = router;

backend/routes/user.js

@@ -0,0 +1,294 @@
+const router = require("express").Router();
+const { Challenge } = require("../models/challenge");
+const { Game } = require("../models/game");
+const { User } = require("../models/user");
+const { checkAuth } = require("../util/auth");
+const { catchAsync } = require("../util/errors");
+
+// API enpoints related to a user, requires authentication
+
+// extracts the user details of userId. Use only if the req object contains userId field.
+const extractUserDetails = async (req, res, next) => {
+  try {
+    let { userId } = req;
+    if (!userId) throw { message: "userId not found" };
+    else {
+      let user = await User.findById(userId);
+      req.user = user;
+    }
+  } catch (err) {
+    next(err);
+  }
+  next();
+};
+
+// TO BE TESTED
+// get the logged in user details
+router.get("/", checkAuth, extractUserDetails, async (req, res, next) => {
+  try {
+    let { user } = req;
+    let { id, username, email, fname, lname, country, location } = user;
+    let friends = await user.getFriends();
+    let games = await user.getGames();
+    return res.status(200).json({
+      id,
+      username,
+      email,
+      friends,
+      fname,
+      lname,
+      country,
+      location,
+      games,
+    });
+  } catch (err) {
+    next(err);
+  }
+});
+
+// TO BE TESTED
+// update logged in user details
+router.patch("/", checkAuth, async (req, res, next) => {
+  try {
+    let { userId } = req;
+    let updatedData = req.body;
+    await User.findByIdAndUpdate(userId, { ...updatedData });
+    let { id, username, email, fname, lname, location, country, fullName } =
+      await User.findById(userId);
+    return res.status(200).json({
+      user: {
+        id,
+        username,
+        email,
+        fname,
+        lname,
+        location,
+        country,
+        fullName,
+      },
+    });
+  } catch (err) {
+    next(err);
+  }
+});
+
+// TO BE TRIED ONCE
+// TO BE TESTED
+// delete logged in user account
+router.delete("/", checkAuth, extractUserDetails, async (req, res, next) => {
+  try {
+    let { user } = req;
+    await user.deleteOne();
+    return res.status(204).json({ message: "Account deleted succesfully" });
+  } catch (err) {
+    next(err);
+  }
+});
+
+// TO BE TESTED
+// get all friends of logged in user
+router.get(
+  "/friends",
+  checkAuth,
+  extractUserDetails,
+  async (req, res, next) => {
+    try {
+      let { user } = req;
+      let friends = await user.getFriends();
+      return res.status(200).json(friends);
+    } catch (err) {
+      next(err);
+    }
+  }
+);
+
+// TO BE TESTED
+// add a friend
+router.post(
+  "/friends",
+  checkAuth,
+  extractUserDetails,
+  async (req, res, next) => {
+    let { friendUsername } = req.body;
+    const { user } = req;
+    if (user.username === friendUsername)
+      res.status(405).json({
+        error: {
+          description: "Cannot add yourself as friend",
+          message: "Cannot add this user as friends",
+        },
+      });
+    let friendData = await User.findOne({ username: friendUsername });
+    if (friendData) {
+      if (friendData.friends.includes(user._id)) {
+        res.status(409).json({
+          error: {
+            message: "User is already added as a friend",
+            description: "User is already added as a friend",
+          },
+        });
+      } else {
+        friendData.friends.push(user._id);
+        await friendData.save();
+        user.friends.push(friendData._id);
+        await user.save();
+        res.status(201).json({});
+      }
+    } else {
+      res.status(404).json({
+        error: {
+          message: "User not found",
+          description: "username not found in DB",
+        },
+      });
+    }
+  }
+);
+
+// TO BE TESTED
+// remove a user from friends list
+router.delete(
+  "/friends",
+  checkAuth,
+  extractUserDetails,
+  catchAsync(async (req, res, next) => {
+    const { friendUsername } = req.body;
+    const { user } = req;
+
+    // Find the friend user to be removed
+    const friendData = await User.findOne({ username: friendUsername });
+    if (!friendData) {
+      return res.status(404).json({
+        error: {
+          message: "Cannot add username that does not exists",
+          description: "username to be added as friend not found.",
+        },
+      });
+    }
+
+    // Remove the friend from the user's friends list
+    const friendIndex = user.friends.indexOf(friendData._id);
+    if (friendIndex === -1) {
+      return res.status(400).json({
+        error: { message: "Friend user not found in the friends list" },
+      });
+    }
+    user.friends.splice(friendIndex, 1);
+    await user.save();
+
+    // Remove the user from the friend's friends list
+    const userIndex = friendData.friends.indexOf(user._id);
+    if (userIndex === -1) {
+      return res.status(400).json({
+        error: { message: "User not found in the friend's friends list" },
+      });
+    }
+    friendData.friends.splice(userIndex, 1);
+    await friendData.save();
+
+    return res.json({});
+  })
+);
+
+// TO BE TESTED
+// get all logged in users challenges
+router.get(
+  "/challenges",
+  checkAuth,
+  extractUserDetails,
+  async (req, res, next) => {
+    try {
+      let { user } = req;
+      let challenges = await Challenge.find({ challenged: user.username });
+      challenges = challenges.map((challenge) => {
+        let { id, challenged, challenger, color, roomID, timeLimit } =
+          challenge;
+        return { id, challenged, challenger, color, roomID, timeLimit };
+      });
+      console.log(challenges);
+      res.status(200).json(challenges);
+    } catch (err) {
+      next(err);
+    }
+  }
+);
+
+// ??
+// TO BE TESTED
+// TODO: add some logic to notify the challenger if the challenged user declines the challenge
+// accept or decline a challenge
+// challengeID here refers to the roomID associated with the challenge
+router.delete("/challenges/:challengeID", checkAuth, async (req, res, next) => {
+  try {
+    let { challengeID } = req.params;
+    let challenge = await Challenge.findById(challengeID);
+    if (!challenge)
+      return res.status(404).json({
+        message: "Challenge not found",
+        description: "Challenge ID does not exists",
+      });
+    await challenge.deleteOne();
+    return res.status(200).json({});
+  } catch (err) {
+    next(err);
+  }
+});
+
+// TO BE TESTED
+// get history of games played by logged in user
+router.get("/games", checkAuth, extractUserDetails, async (req, res, next) => {
+  try {
+    const { user } = req;
+    let games = await user.getGames();
+    if (!games) games = [];
+    return res.status(200).json(games);
+  } catch (err) {
+    next(err);
+  }
+});
+
+// TO BE TESTED
+// get game details of a certain game played by logged in user
+router.get(
+  "/games/:gameid",
+  checkAuth,
+  extractUserDetails,
+  async (req, res, next) => {
+    try {
+      let { gameid } = req.params;
+      let { user } = req;
+      let gameDoc = await Game.findById(gameid);
+
+      if (!gameDoc) {
+        return res.status(404).json({
+          message: "Game not found",
+          description: "Game id is invalid",
+        });
+      }
+
+      if (
+        user.id == gameDoc.white._id.toString() ||
+        user.id == gameDoc.black._id.toString()
+      ) {
+        return res.status(200).json(gameDoc);
+      } else {
+        res.status(404).json({
+          message: "Game not found",
+          description: "Game id does not belong to the logged in user",
+        });
+      }
+    } catch (err) {
+      next(err);
+    }
+  }
+);
+
+// TODO
+// add a game
+router.post("/games", checkAuth, async (req, res, next) => {
+  const gameData = req.body;
+  const gameDoc = await Game.create(gameData);
+  return res.json({ data: gameDoc });
+});
+
+module.exports = router;

backend/socket.js

@@ -0,0 +1,200 @@
+const socket = require("socket.io");
+const { SOCKET_EVENTS } = require("./constants");
+const { Chess } = require("chess.js");
+const { User } = require("./models/user");
+const { Game } = require("./models/game");
+const { nextMove } = require("./chessbot");
+const {
+    CHESS_MOVE,
+    CHESS_OPPONENT_MOVE,
+    JOIN_ROOM,
+    JOIN_ROOM_ERROR,
+    JOIN_ROOM_SUCCESS,
+    ROOM_FULL,
+    USER_JOINED_ROOM,
+    USER_RESIGNED,
+    GAME_END,
+} = SOCKET_EVENTS;
+// roomID => { timeLimit,gameHistory , players:{'b': {username,userid}, 'w':{username,userid} } }
+let activeRooms = new Map();
+
+// chess - chess object
+// moveData - {from,to} => lan notation
+function isValidMove(chess,moveData) {
+    let newChess = new Chess();
+    newChess.loadPgn(chess.pgn());
+    try {
+        newChess.move(moveData);
+        return true;
+    } catch(err) {
+        return false;
+    }
+}
+
+function createRoom(roomID, timeLimit) {
+    console.log(roomID, "created");
+    activeRooms.set(roomID, { timeLimit, players: {}, gameHistory: [] });
+    console.log("Currently active rooms", activeRooms.size);
+}
+
+function getRoom(roomID) {
+    return activeRooms.get(roomID);
+}
+
+function destoryRoom(roomID) {
+    activeRooms.delete(roomID);
+}
+
+// structure of userDetails: {username,userid,color}
+function addUserToRoom(roomID, socket, userDetails) {
+    console.log(userDetails);
+    let { username, color, userid } = userDetails;
+    let room = activeRooms.get(roomID);
+
+    if (room.players[color]) {
+        room.players[color] = { username, userid, socket };
+        return JOIN_ROOM_SUCCESS;
+    }
+    if (Object.keys(room.players).length > 1) {
+        // room is full
+        console.log(activeRooms);
+        return ROOM_FULL;
+    } else {
+        room.players[color] = { username, userid, socket };
+    }
+    console.log(activeRooms);
+
+    return JOIN_ROOM_SUCCESS;
+}
+
+// initialize the socket server with the given http server instance
+function socketIOServerInit(server) {
+    const io = new socket.Server(server, {
+        cors: {
+            origin: process.env.CORS_ALLOWED_HOST,
+        },
+    });
+
+    const ioBot = io.of("/chessbot");
+
+    ioBot.on("connection", (socket) => {
+        let id = socket.id;
+        console.log(id, "connected on /chessbot");
+        const chess = new Chess();
+
+        socket.onAny((evt) => {
+            console.log(evt);
+        });
+
+        socket.on('INIT', async (data) => {
+            if(data.color === 'b') {
+                console.log(data.color);
+                const botMove = await nextMove({position:chess.fen()});
+                console.log({ from: botMove.substring(0, 2), to: botMove.substring(2) });
+                chess.move({from:botMove.substring(0,2),to:botMove.substring(2)});
+                setTimeout(() => {
+                    socket.emit("CHESS_BOT_MOVE",{from:botMove.substring(0,2),to:botMove.substring(2)})
+                }, 500);
+            }
+        });
+
+        socket.on("disconnect", (reason) => {
+            console.log(id, "disconnected due to", reason);
+        });
+
+        socket.on(CHESS_MOVE, async (roomID, moveData) => {
+            console.log("CHESS_MOVE");
+            if(!isValidMove(chess,moveData)) return;
+            chess.move(moveData);
+            let move = moveData.from + moveData.to;
+            console.log(move);
+            const botMove = await nextMove({ position: chess.fen() });
+            console.log({ from: botMove.substring(0, 2), to: botMove.substring(2) });
+            chess.move({ from: botMove.substring(0, 2), to: botMove.substring(2) });
+            socket.emit("CHESS_BOT_MOVE", { from: botMove.substring(0, 2), to: botMove.substring(2) });
+        });
+    });
+
+    io.on("connection", (socket) => {
+        let id = socket.id;
+        console.log(socket.id, "connected");
+
+        socket.on("disconnect", (reason) => {
+            console.log(id, "disconnected due to", reason);
+        });
+
+        // data is the metadata of the user joining the room played between the users
+        // structure: {username,color}
+        socket.on(JOIN_ROOM, (roomID, data) => {
+            if (activeRooms.has(roomID)) {
+                let result = addUserToRoom(roomID, socket, data);
+                if (result === JOIN_ROOM_SUCCESS) {
+                    socket.join(roomID);
+                    // io.to(roomID).emit("new user joined the room");
+                    console.log(data, "joined");
+                    let room = getRoom(roomID);
+                    socket.to(roomID).emit(USER_JOINED_ROOM, data.username);
+                    socket.emit(result, room.gameHistory); // room joined successfully
+                } else {
+                    socket.emit(result); // room is full
+                }
+            } else {
+                socket.emit(JOIN_ROOM_ERROR, "room does not exist");
+            }
+        });
+
+        socket.on(CHESS_MOVE, (roomID, moveData) => {
+            console.log(moveData);
+            let room = activeRooms.get(roomID);
+            room.gameHistory.push(moveData);
+            socket.to(roomID).emit(CHESS_OPPONENT_MOVE, moveData);
+        });
+
+        socket.on(USER_RESIGNED, async (roomID, username) => {
+            socket.to(roomID).emit(USER_RESIGNED, username);
+        });
+
+        socket.on(GAME_END, async (roomID) => {
+            console.log("Ending game...");
+            const room = getRoom(roomID);
+            const black = room.players["b"];
+            const white = room.players["w"];
+            io.socketsLeave(roomID);
+            black.socket.disconnect();
+            white.socket.disconnect();
+
+            // generating pgn
+            let moves = room.gameHistory;
+            let chess = new Chess();
+            for (let move of moves) {
+                let { from, to } = move;
+                chess.move({ from, to });
+            }
+            let pgn = chess.pgn();
+
+            const blackPlayerDoc = await User.findById(black.userid);
+            const whitePlayerDoc = await User.findById(white.userid);
+
+            let gameData = {
+                white: whitePlayerDoc.id,
+                black: blackPlayerDoc.id,
+                timeLimit: room.timeLimit,
+                roomID,
+                pgn,
+            };
+            const gameDoc = await Game.create(gameData);
+
+            blackPlayerDoc.games.push(gameDoc.id);
+            await blackPlayerDoc.save();
+            whitePlayerDoc.games.push(gameDoc.id);
+            await whitePlayerDoc.save();
+        });
+    });
+}
+
+module.exports = {
+    activeRooms,
+    createRoom,
+    addUserToRoom,
+    socketIOServerInit,
+};

backend/util/auth.js

@@ -0,0 +1,72 @@
+const { sign, verify } = require("jsonwebtoken");
+const { compare, hash, genSalt } = require("bcryptjs");
+const { NotAuthError } = require("./errors");
+
+const KEY = "supersecret";
+
+async function generatePasswordHash(password) {
+    const password_hash = await hash(password, await genSalt(10));
+    return password_hash;
+}
+
+function createJSONToken(id) {
+    return sign({ id }, KEY, { noTimestamp: true });
+}
+
+function validateJSONToken(token) {
+    return verify(token, KEY);
+}
+
+function isValidPassword(password, storedPassword) {
+    return compare(password, storedPassword);
+}
+
+// function checkAuthMiddleware(req, res, next) {
+//     if (req.method === "OPTIONS") {
+//         return next();
+//     }
+//     if (!req.headers.authorization) {
+//         console.log("NOT AUTH. AUTH HEADER MISSING.");
+//         return next(new NotAuthError("Not authenticated."));
+//     }
+//     const authFragments = req.headers.authorization.split(" ");
+
+//     if (authFragments.length !== 2) {
+//         console.log("NOT AUTH. AUTH HEADER INVALID.");
+//         return next(new NotAuthError("Not authenticated."));
+//     }
+//     const authToken = authFragments[1];
+//     try {
+//         const validatedToken = validateJSONToken(authToken);
+//         req.userid = validatedToken;
+//     } catch (error) {
+//         console.log("NOT AUTH. TOKEN INVALID.");
+//         return next(new NotAuthError("Not authenticated."));
+//     }
+//     next();
+// }
+
+function checkAuthMiddleware(req, res, next) {
+    if (req.method === "OPTIONS") {
+        return next();
+    }
+    let authToken = req.cookies["auth-token"];
+    if (!authToken) {
+        return res.status(401).json({ message: "Not authenticated", description: "Auth token not found" });
+    }
+    try {
+        const validatedToken = validateJSONToken(authToken);
+        req.userId = validatedToken.id;
+        req.isAuthenticated = true;
+    } catch (error) {
+        console.log("NOT AUTH. TOKEN INVALID.");
+        return res.status(401).json({ message: "Not authenticated", description: "Invalid auth token" });
+    }
+    next();
+}
+
+exports.createJSONToken = createJSONToken;
+exports.validateJSONToken = validateJSONToken;
+exports.isValidPassword = isValidPassword;
+exports.checkAuth = checkAuthMiddleware;
+exports.generatePasswordHash = generatePasswordHash;

backend/util/errors.js

@@ -0,0 +1,23 @@
+class NotFoundError {
+    constructor(message) {
+        this.message = message;
+        this.status = 404;
+    }
+}
+
+class NotAuthError {
+    constructor(message) {
+        this.message = message;
+        this.status = 401;
+    }
+}
+
+function catchAsync(callback) {
+    return (req, res, next) => {
+        callback(req, res, next).catch(next);
+    };
+}
+
+exports.NotFoundError = NotFoundError;
+exports.NotAuthError = NotAuthError;
+exports.catchAsync = catchAsync

backend/util/validation.js

@@ -0,0 +1,21 @@
+function isValidText(value, minLength = 1) {
+  return value && value.trim().length >= minLength;
+}
+
+function isValidDate(value) {
+  const date = new Date(value);
+  return value && date !== 'Invalid Date';
+}
+
+function isValidImageUrl(value) {
+  return value && value.startsWith('http');
+}
+
+function isValidEmail(value) {
+  return value && value.includes('@');
+}
+
+exports.isValidText = isValidText;
+exports.isValidDate = isValidDate;
+exports.isValidImageUrl = isValidImageUrl;
+exports.isValidEmail = isValidEmail;

docker-compose.yml

@@ -0,0 +1,20 @@
+version: "3.7"
+
+services:
+    frontend:
+        build: ./frontend
+        command: sh -c "npm rebuild esbuild && npm run dev"
+        volumes:
+            - ./frontend:/usr/src/app
+        ports:
+            - 127.0.0.1:5173:5173
+    backend:
+        build: ./backend
+        command: nodemon -L app.js
+        volumes:
+            - ./backend:/usr/src/app
+        ports:
+            - 127.0.0.1:8080:8080
+        environment:
+            - PORT=8080
+            - CHESS_ENGINE_PATH=engine/stockfish16

frontend/.dockerignore

@@ -0,0 +1,2 @@
+**/node_modules
+node_modules/*

frontend/.env.example

@@ -0,0 +1 @@
+VITE_BACKEND_HOST='http://localhost:8080'

frontend/.eslintignore

@@ -0,0 +1,5 @@
+node_modules/
+dist/
+.prettierrc.js
+.eslintrc.js
+env.d.ts

frontend/.eslintrc.cjs

@@ -0,0 +1,37 @@
+module.exports = {
+    extends: [
+      // By extending from a plugin config, we can get recommended rules without having to add them manually.
+      'eslint:recommended',
+      'plugin:react/recommended',
+      'plugin:import/recommended',
+      'plugin:jsx-a11y/recommended',
+      'plugin:@typescript-eslint/recommended',
+      // This disables the formatting rules in ESLint that Prettier is going to be responsible for handling.
+      // Make sure it's always the last config, so it gets the chance to override other configs.
+      'eslint-config-prettier',
+    ],
+    settings: {
+      react: {
+        // Tells eslint-plugin-react to automatically detect the version of React to use.
+        version: 'detect',
+      },
+      // Tells eslint how to resolve imports
+      'import/resolver': {
+        node: {
+          paths: ['src'],
+          extensions: ['.js', '.jsx', '.ts', '.tsx'],
+        },
+      },
+    },
+    rules: {
+      // Add your own rules here to override ones from the extended configs.
+      "react/react-in-jsx-scope": "off",
+      "react/jsx-uses-react": "off",
+      "no-console": "off",
+    },
+    "env":{
+      "browser":true,
+      "node":true
+    }
+  };
+  

frontend/.gitignore

@@ -0,0 +1,27 @@
+# Logs
+logs
+*.log
+npm-debug.log*
+yarn-debug.log*
+yarn-error.log*
+pnpm-debug.log*
+lerna-debug.log*
+
+node_modules
+dist
+dist-ssr
+*.local
+
+# Editor directories and files
+.vscode/*
+!.vscode/extensions.json
+.idea
+.DS_Store
+*.suo
+*.ntvs*
+*.njsproj
+*.sln
+*.sw?
+
+.env
+test.jsx

frontend/dockerfile

@@ -0,0 +1,20 @@
+# Dockerfile for React client
+
+# Build react client
+FROM node
+
+# Working directory be app
+WORKDIR /usr/src/app
+
+COPY package*.json ./
+
+###  Installing dependencies
+
+RUN npm install --silent
+
+# copy local files to app folder
+COPY . .
+
+EXPOSE 5173
+
+CMD ["npm","run","dev"]

frontend/index.html

@@ -0,0 +1,23 @@
+<!DOCTYPE html>
+<html lang="en">
+    <head>
+        <meta charset="UTF-8" />
+        <link rel="icon" type="image/png" href="/favicon.ico" />
+        <meta name="viewport" content="width=device-width, initial-scale=1.0" />
+        <title>ChessHub</title>
+        <style>
+            body {
+                margin: 0;
+                width: 100%;
+                min-width: 420px;
+            }
+        </style>
+    </head>
+    <body>
+        <div id="root"></div>
+        <div
+            id="main-loader"
+        ></div>
+        <script type="module" src="/src/main.tsx"></script>
+    </body>
+</html>

frontend/package.json

@@ -0,0 +1,54 @@
+{
+    "name": "chess-",
+    "private": true,
+    "version": "0.0.0",
+    "type": "module",
+    "scripts": {
+        "dev": "vite --host",
+        "build": "vite build",
+        "lint": "eslint src --ext js,jsx --report-unused-disable-directives --max-warnings 0",
+        "preview": "vite preview",
+        "test": "vitest"
+    },
+    "dependencies": {
+        "@dnd-kit/core": "^6.0.8",
+        "@emotion/react": "^11.11.1",
+        "@mantine/core": "^6.0.14",
+        "@mantine/form": "^6.0.16",
+        "@mantine/hooks": "^6.0.14",
+        "@radix-ui/react-icons": "^1.3.0",
+        "@tabler/icons-react": "^2.23.0",
+        "@typescript-eslint/eslint-plugin": "^6.2.0",
+        "@typescript-eslint/parser": "^6.2.0",
+        "chess.js": "^1.0.0-beta.6",
+        "eslint": "^8.45.0",
+        "eslint-config-prettier": "^8.8.0",
+        "eslint-plugin-import": "^2.27.5",
+        "eslint-plugin-jsx-a11y": "^6.7.1",
+        "eslint-plugin-react": "^7.33.0",
+        "framer-motion": "^11.2.3",
+        "js-cookie": "^3.0.5",
+        "prettier": "^3.0.0",
+        "react": "^18.2.0",
+        "react-dom": "^18.2.0",
+        "react-hook-form": "^7.45.2",
+        "react-router-dom": "^6.14.0",
+        "socket.io-client": "^4.7.1",
+        "zod": "^3.21.4"
+    },
+    "devDependencies": {
+        "@testing-library/jest-dom": "^5.17.0",
+        "@testing-library/react": "^14.0.0",
+        "@testing-library/user-event": "^14.4.3",
+        "@types/react": "^18.3.4",
+        "@types/react-dom": "^18.3.0",
+        "@vitejs/plugin-react": "^4.0.0",
+        "eslint-plugin-react-hooks": "^4.6.0",
+        "eslint-plugin-react-refresh": "^0.3.4",
+        "jest": "^29.6.1",
+        "jest-environment-jsdom": "^29.6.1",
+        "typescript": "^5.5.4",
+        "vite": "^4.3.9",
+        "vitest": "^0.33.0"
+    }
+}