Merge pull request #1 from mizanxali/socketio

Added socket.IO server

.gitignore

@@ -1,23 +1,4 @@
 # See https://help.github.com/articles/ignoring-files/ for more about ignoring files.
 
 # dependencies
-/node_modules
-/.pnp
-.pnp.js
-
-# testing
-/coverage
-
-# production
-/build
-
-# misc
-.DS_Store
-.env.local
-.env.development.local
-.env.test.local
-.env.production.local
-
-npm-debug.log*
-yarn-debug.log*
-yarn-error.log*
+node_modules/

README.md

@@ -1,70 +1 @@
-# Getting Started with Create React App
-
-This project was bootstrapped with [Create React App](https://github.com/facebook/create-react-app).
-
-## Available Scripts
-
-In the project directory, you can run:
-
-### `npm start`
-
-Runs the app in the development mode.\
-Open [http://localhost:3000](http://localhost:3000) to view it in the browser.
-
-The page will reload if you make edits.\
-You will also see any lint errors in the console.
-
-### `npm test`
-
-Launches the test runner in the interactive watch mode.\
-See the section about [running tests](https://facebook.github.io/create-react-app/docs/running-tests) for more information.
-
-### `npm run build`
-
-Builds the app for production to the `build` folder.\
-It correctly bundles React in production mode and optimizes the build for the best performance.
-
-The build is minified and the filenames include the hashes.\
-Your app is ready to be deployed!
-
-See the section about [deployment](https://facebook.github.io/create-react-app/docs/deployment) for more information.
-
-### `npm run eject`
-
-**Note: this is a one-way operation. Once you `eject`, you can’t go back!**
-
-If you aren’t satisfied with the build tool and configuration choices, you can `eject` at any time. This command will remove the single build dependency from your project.
-
-Instead, it will copy all the configuration files and the transitive dependencies (webpack, Babel, ESLint, etc) right into your project so you have full control over them. All of the commands except `eject` will still work, but they will point to the copied scripts so you can tweak them. At this point you’re on your own.
-
-You don’t have to ever use `eject`. The curated feature set is suitable for small and middle deployments, and you shouldn’t feel obligated to use this feature. However we understand that this tool wouldn’t be useful if you couldn’t customize it when you are ready for it.
-
-## Learn More
-
-You can learn more in the [Create React App documentation](https://facebook.github.io/create-react-app/docs/getting-started).
-
-To learn React, check out the [React documentation](https://reactjs.org/).
-
-### Code Splitting
-
-This section has moved here: [https://facebook.github.io/create-react-app/docs/code-splitting](https://facebook.github.io/create-react-app/docs/code-splitting)
-
-### Analyzing the Bundle Size
-
-This section has moved here: [https://facebook.github.io/create-react-app/docs/analyzing-the-bundle-size](https://facebook.github.io/create-react-app/docs/analyzing-the-bundle-size)
-
-### Making a Progressive Web App
-
-This section has moved here: [https://facebook.github.io/create-react-app/docs/making-a-progressive-web-app](https://facebook.github.io/create-react-app/docs/making-a-progressive-web-app)
-
-### Advanced Configuration
-
-This section has moved here: [https://facebook.github.io/create-react-app/docs/advanced-configuration](https://facebook.github.io/create-react-app/docs/advanced-configuration)
-
-### Deployment
-
-This section has moved here: [https://facebook.github.io/create-react-app/docs/deployment](https://facebook.github.io/create-react-app/docs/deployment)
-
-### `npm run build` fails to minify
-
-This section has moved here: [https://facebook.github.io/create-react-app/docs/troubleshooting#npm-run-build-fails-to-minify](https://facebook.github.io/create-react-app/docs/troubleshooting#npm-run-build-fails-to-minify)
+Online multiplayer card game.

client/package.json

@@ -0,0 +1,40 @@
+{
+  "name": "uno-online",
+  "version": "0.1.0",
+  "private": true,
+  "dependencies": {
+    "@testing-library/jest-dom": "^5.11.9",
+    "@testing-library/react": "^11.2.5",
+    "@testing-library/user-event": "^12.7.0",
+    "query-string": "^6.14.0",
+    "react": "^17.0.1",
+    "react-dom": "^17.0.1",
+    "react-router-dom": "^5.2.0",
+    "react-scripts": "4.0.2",
+    "socket.io-client": "^3.1.1"
+  },
+  "scripts": {
+    "start": "react-scripts start",
+    "build": "react-scripts build",
+    "test": "react-scripts test",
+    "eject": "react-scripts eject"
+  },
+  "eslintConfig": {
+    "extends": [
+      "react-app",
+      "react-app/jest"
+    ]
+  },
+  "browserslist": {
+    "production": [
+      ">0.2%",
+      "not dead",
+      "not op_mini all"
+    ],
+    "development": [
+      "last 1 chrome version",
+      "last 1 firefox version",
+      "last 1 safari version"
+    ]
+  }
+}

client/src/components/Game.js

@@ -1,6 +1,8 @@
 import React, { useEffect, useState } from 'react'
 import PACK_OF_CARDS from '../utils/packOfCards'
 import shuffleArray from '../utils/shuffleArray'
+import io from 'socket.io-client'
+import queryString from 'query-string'
 
 //NUMBER CODES FOR ACTION CARDS
 //SKIP - 404
@@ -8,7 +10,40 @@ import shuffleArray from '../utils/shuffleArray'
 //WILD - 300
 //DRAW 4 WILD - 600
 
-const Game = () => {
+let socket
+const ENDPOINT = 'http://localhost:5000'
+
+const Game = (props) => {
+    const data = queryString.parse(props.location.search)
+
+    //initialize socket state
+    const [room, setRoom] = useState(data.roomCode)
+    const [roomFull, setRoomFull] = useState(false)
+    const [users, setUsers] = useState([])
+    const [currentUser, setCurrentUser] = useState('')
+
+    useEffect(() => {
+        const connectionOptions =  {
+            "forceNew" : true,
+            "reconnectionAttempts": "Infinity", 
+            "timeout" : 10000,                  
+            "transports" : ["websocket"]
+        }
+        socket = io.connect(ENDPOINT, connectionOptions)
+        console.log(socket);
+
+        socket.emit('join', {room: room}, (error) => {
+            if(error)
+                setRoomFull(true)
+        })
+
+        //cleanup on component unmount
+        return function cleanup() {
+            socket.emit('disconnect')
+            //shut down connnection instance
+            socket.off()
+        }
+    }, [])
 
     //initialize game state
     const [gameOver, setGameOver] = useState(true)
@@ -53,15 +88,50 @@ const Game = () => {
         //store all remaining cards into drawCardPile
         const drawCardPile = shuffledCards
 
-        //set initial state
-        setGameOver(false)
-        setTurn('Player 1')
-        setPlayer1Deck([...player1Deck])
-        setPlayer2Deck([...player2Deck])
-        setCurrentColor(playedCardsPile[0].charAt(1))
-        setCurrentNumber(playedCardsPile[0].charAt(0))
-        setPlayedCardsPile([...playedCardsPile])
-        setDrawCardPile([...drawCardPile])
+        //send initial state to server
+        socket.emit('initGameState', {
+            gameOver: false,
+            turn: 'Player 1',
+            player1Deck: [...player1Deck],
+            player2Deck: [...player2Deck],
+            currentColor: playedCardsPile[0].charAt(1),
+            currentNumber: playedCardsPile[0].charAt(0),
+            playedCardsPile: [...playedCardsPile],
+            drawCardPile: [...drawCardPile]
+        })
+    }, [])
+
+    useEffect(() => {
+        socket.on('initGameState', ({ gameOver, turn, player1Deck, player2Deck, currentColor, currentNumber, playedCardsPile, drawCardPile }) => {
+            setGameOver(gameOver)
+            setTurn(turn)
+            setPlayer1Deck(player1Deck)
+            setPlayer2Deck(player2Deck)
+            setCurrentColor(currentColor)
+            setCurrentNumber(currentNumber)
+            setPlayedCardsPile(playedCardsPile)
+            setDrawCardPile(drawCardPile)
+        })
+
+        socket.on('updateGameState', ({ gameOver, winner, turn, player1Deck, player2Deck, currentColor, currentNumber, playedCardsPile, drawCardPile }) => {
+            gameOver && setGameOver(gameOver)
+            winner && setWinner(winner)
+            turn && setTurn(turn)
+            player1Deck && setPlayer1Deck(player1Deck)
+            player2Deck && setPlayer2Deck(player2Deck)
+            currentColor && setCurrentColor(currentColor)
+            currentNumber && setCurrentNumber(currentNumber)
+            playedCardsPile && setPlayedCardsPile(playedCardsPile)
+            drawCardPile && setDrawCardPile(drawCardPile)
+        })
+
+        socket.on("roomData", ({ users }) => {
+            setUsers(users)
+        })
+
+        socket.on('currentUserData', ({ name }) => {
+            setCurrentUser(name)
+        })
     }, [])
 
     //some util functions
@@ -90,27 +160,31 @@ const Game = () => {
                         //remove the played card from player1's deck and add it to playedCardsPile (immutably)
                         //then update turn, currentColor and currentNumber
                         const removeIndex = player1Deck.indexOf(played_card)
-                        //set new state
-                        setGameOver(checkGameOver(player1Deck))
-                        setWinner(checkWinner(player1Deck, 'Player 1'))
-                        setTurn('Player 2')
-                        setPlayedCardsPile([...playedCardsPile.slice(0, playedCardsPile.length), played_card, ...playedCardsPile.slice(playedCardsPile.length)])
-                        setPlayer1Deck([...player1Deck.slice(0, removeIndex), ...player1Deck.slice(removeIndex + 1)])
-                        setCurrentColor(colorOfPlayedCard)
-                        setCurrentNumber(numberOfPlayedCard)
+                        //send new state to server
+                        socket.emit('updateGameState', {
+                            gameOver: checkGameOver(player1Deck),
+                            winner: checkWinner(player1Deck, 'Player 1'),
+                            turn: 'Player 2',
+                            playedCardsPile: [...playedCardsPile.slice(0, playedCardsPile.length), played_card, ...playedCardsPile.slice(playedCardsPile.length)],
+                            player1Deck: [...player1Deck.slice(0, removeIndex), ...player1Deck.slice(removeIndex + 1)],
+                            currentColor: colorOfPlayedCard,
+                            currentNumber: numberOfPlayedCard
+                        })
                     }
                     else {
                         //remove the played card from player2's deck and add it to playedCardsPile (immutably)
                         //then update turn, currentColor and currentNumber
                         const removeIndex = player2Deck.indexOf(played_card)
-                        //set new state    
-                        setGameOver(checkGameOver(player2Deck))
-                        setWinner(checkWinner(player1Deck, 'Player 2'))
-                        setTurn('Player 1')
-                        setPlayedCardsPile([...playedCardsPile.slice(0, playedCardsPile.length), played_card, ...playedCardsPile.slice(playedCardsPile.length)])
-                        setPlayer2Deck([...player2Deck.slice(0, removeIndex), ...player2Deck.slice(removeIndex + 1)])
-                        setCurrentColor(colorOfPlayedCard)
-                        setCurrentNumber(numberOfPlayedCard)
+                        //send new state to server
+                        socket.emit('updateGameState', {
+                            gameOver: checkGameOver(player2Deck),
+                            winner: checkWinner(player2Deck, 'Player 2'),
+                            turn: 'Player 1',
+                            playedCardsPile: [...playedCardsPile.slice(0, playedCardsPile.length), played_card, ...playedCardsPile.slice(playedCardsPile.length)],
+                            player2Deck: [...player2Deck.slice(0, removeIndex), ...player2Deck.slice(removeIndex + 1)],
+                            currentColor: colorOfPlayedCard,
+                            currentNumber: numberOfPlayedCard
+                        })
                     }
                 }
                 //check for number match
@@ -121,30 +195,33 @@ const Game = () => {
                         //remove the played card from player1's deck and add it to playedCardsPile (immutably)
                         //then update turn, currentColor and currentNumber
                         const removeIndex = player1Deck.indexOf(played_card)
-                        //set new state
-                        setGameOver(checkGameOver(player1Deck))
-                        setWinner(checkWinner(player1Deck, 'Player 1'))
-                        setTurn('Player 2')
-                        setPlayedCardsPile([...playedCardsPile.slice(0, playedCardsPile.length), played_card, ...playedCardsPile.slice(playedCardsPile.length)])
-                        setPlayer1Deck([...player1Deck.slice(0, removeIndex), ...player1Deck.slice(removeIndex + 1)])
-                        setCurrentColor(colorOfPlayedCard)
-                        setCurrentNumber(numberOfPlayedCard)
+                        //send new state to server
+                        socket.emit('updateGameState', {
+                            gameOver: checkGameOver(player1Deck),
+                            winner: checkWinner(player1Deck, 'Player 1'),
+                            turn: 'Player 2',
+                            playedCardsPile: [...playedCardsPile.slice(0, playedCardsPile.length), played_card, ...playedCardsPile.slice(playedCardsPile.length)],
+                            player1Deck: [...player1Deck.slice(0, removeIndex), ...player1Deck.slice(removeIndex + 1)],
+                            currentColor: colorOfPlayedCard,
+                            currentNumber: numberOfPlayedCard
+                        })
                     }
                     else {
                         //remove the played card from player2's deck and add it to playedCardsPile (immutably)
                         //then update turn, currentColor and currentNumber
                         const removeIndex = player2Deck.indexOf(played_card)
-                        //set new state
-                        setGameOver(checkGameOver(player2Deck))
-                        setWinner(checkWinner(player1Deck, 'Player 2'))
-                        setTurn('Player 1')
-                        setPlayedCardsPile([...playedCardsPile.slice(0, playedCardsPile.length), played_card, ...playedCardsPile.slice(playedCardsPile.length)])
-                        setPlayer2Deck([...player2Deck.slice(0, removeIndex), ...player2Deck.slice(removeIndex + 1)])
-                        setCurrentColor(colorOfPlayedCard)
-                        setCurrentNumber(numberOfPlayedCard)
+                        //send new state to server
+                        socket.emit('updateGameState', {
+                            gameOver: checkGameOver(player2Deck),
+                            winner: checkWinner(player2Deck, 'Player 2'),
+                            turn: 'Player 1',
+                            playedCardsPile: [...playedCardsPile.slice(0, playedCardsPile.length), played_card, ...playedCardsPile.slice(playedCardsPile.length)],
+                            player2Deck: [...player2Deck.slice(0, removeIndex), ...player2Deck.slice(removeIndex + 1)],
+                            currentColor: colorOfPlayedCard,
+                            currentNumber: numberOfPlayedCard
+                        })
                     }
                 }
-
                 //if no color or number match, invalid move - do not update state
                 else {
                     alert('Invalid Move!')
@@ -163,25 +240,29 @@ const Game = () => {
                         //remove the played card from player1's deck and add it to playedCardsPile (immutably)
                         //then update currentColor and currentNumber
                         const removeIndex = player1Deck.indexOf(played_card)
-                        //set new state
-                        setGameOver(checkGameOver(player1Deck))
-                        setWinner(checkWinner(player1Deck, 'Player 1'))
-                        setPlayedCardsPile([...playedCardsPile.slice(0, playedCardsPile.length), played_card, ...playedCardsPile.slice(playedCardsPile.length)])
-                        setPlayer1Deck([...player1Deck.slice(0, removeIndex), ...player1Deck.slice(removeIndex + 1)])
-                        setCurrentColor(colorOfPlayedCard)
-                        setCurrentNumber(404)
+                        //send new state to server
+                        socket.emit('updateGameState', {
+                            gameOver: checkGameOver(player1Deck),
+                            winner: checkWinner(player1Deck, 'Player 1'),
+                            playedCardsPile: [...playedCardsPile.slice(0, playedCardsPile.length), played_card, ...playedCardsPile.slice(playedCardsPile.length)],
+                            player1Deck: [...player1Deck.slice(0, removeIndex), ...player1Deck.slice(removeIndex + 1)],
+                            currentColor: colorOfPlayedCard,
+                            currentNumber: 404
+                        })
                     }
                     else {
                         //remove the played card from player2's deck and add it to playedCardsPile (immutably)
                         //then update currentColor and currentNumber
                         const removeIndex = player2Deck.indexOf(played_card)
-                        //set new state
-                        setGameOver(checkGameOver(player2Deck))
-                        setWinner(checkWinner(player1Deck, 'Player 2'))
-                        setPlayedCardsPile([...playedCardsPile.slice(0, playedCardsPile.length), played_card, ...playedCardsPile.slice(playedCardsPile.length)])
-                        setPlayer2Deck([...player2Deck.slice(0, removeIndex), ...player2Deck.slice(removeIndex + 1)])
-                        setCurrentColor(colorOfPlayedCard)
-                        setCurrentNumber(404)
+                        //send new state to server
+                        socket.emit('updateGameState', {
+                            gameOver: checkGameOver(player2Deck),
+                            winner: checkWinner(player2Deck, 'Player 2'),
+                            playedCardsPile: [...playedCardsPile.slice(0, playedCardsPile.length), played_card, ...playedCardsPile.slice(playedCardsPile.length)],
+                            player2Deck: [...player2Deck.slice(0, removeIndex), ...player2Deck.slice(removeIndex + 1)],
+                            currentColor: colorOfPlayedCard,
+                            currentNumber: 404
+                        })
                     }
                 }
                 //check for number match - if skip card played on skip card
@@ -192,25 +273,29 @@ const Game = () => {
                         //remove the played card from player1's deck and add it to playedCardsPile (immutably)
                         //then update currentColor and currentNumber - turn will remain same
                         const removeIndex = player1Deck.indexOf(played_card)
-                        //set new state
-                        setGameOver(checkGameOver(player1Deck))
-                        setWinner(checkWinner(player1Deck, 'Player 1'))
-                        setPlayedCardsPile([...playedCardsPile.slice(0, playedCardsPile.length), played_card, ...playedCardsPile.slice(playedCardsPile.length)])
-                        setPlayer1Deck([...player1Deck.slice(0, removeIndex), ...player1Deck.slice(removeIndex + 1)])
-                        setCurrentColor(colorOfPlayedCard)
-                        setCurrentNumber(404)
+                        //send new state to server
+                        socket.emit('updateGameState', {
+                            gameOver: checkGameOver(player1Deck),
+                            winner: checkWinner(player1Deck, 'Player 1'),
+                            playedCardsPile: [...playedCardsPile.slice(0, playedCardsPile.length), played_card, ...playedCardsPile.slice(playedCardsPile.length)],
+                            player1Deck: [...player1Deck.slice(0, removeIndex), ...player1Deck.slice(removeIndex + 1)],
+                            currentColor: colorOfPlayedCard,
+                            currentNumber: 404
+                        })
                     }
                     else {
                         //remove the played card from player2's deck and add it to playedCardsPile (immutably)
                         //then update currentColor and currentNumber - turn will remain same
                         const removeIndex = player2Deck.indexOf(played_card)
-                        //set new state
-                        setGameOver(checkGameOver(player2Deck))
-                        setWinner(checkWinner(player1Deck, 'Player 2'))
-                        setPlayedCardsPile([...playedCardsPile.slice(0, playedCardsPile.length), played_card, ...playedCardsPile.slice(playedCardsPile.length)])
-                        setPlayer2Deck([...player2Deck.slice(0, removeIndex), ...player2Deck.slice(removeIndex + 1)])
-                        setCurrentColor(colorOfPlayedCard)
-                        setCurrentNumber(404)
+                        //send new state to server
+                        socket.emit('updateGameState', {
+                            gameOver: checkGameOver(player2Deck),
+                            winner: checkWinner(player2Deck, 'Player 2'),
+                            playedCardsPile: [...playedCardsPile.slice(0, playedCardsPile.length), played_card, ...playedCardsPile.slice(playedCardsPile.length)],
+                            player2Deck: [...player2Deck.slice(0, removeIndex), ...player2Deck.slice(removeIndex + 1)],
+                            currentColor: colorOfPlayedCard,
+                            currentNumber: 404
+                        })
                     }
                 }
                 //if no color or number match, invalid move - do not update state
@@ -237,15 +322,17 @@ const Game = () => {
                         //pull out last two elements from it
                         const drawCard1 = copiedDrawCardPileArray.pop()
                         const drawCard2 = copiedDrawCardPileArray.pop()
-                        //set new state
-                        setGameOver(checkGameOver(player1Deck))
-                        setWinner(checkWinner(player1Deck, 'Player 1'))
-                        setPlayedCardsPile([...playedCardsPile.slice(0, playedCardsPile.length), played_card, ...playedCardsPile.slice(playedCardsPile.length)])
-                        setPlayer1Deck([...player1Deck.slice(0, removeIndex), ...player1Deck.slice(removeIndex + 1)])
-                        setPlayer2Deck([...player2Deck.slice(0, player2Deck.length), drawCard1, drawCard2, ...player2Deck.slice(player2Deck.length)])
-                        setCurrentColor(colorOfPlayedCard)
-                        setCurrentNumber(252)
-                        setDrawCardPile([...copiedDrawCardPileArray])
+                        //send new state to server
+                        socket.emit('updateGameState', {
+                            gameOver: checkGameOver(player1Deck),
+                            winner: checkWinner(player1Deck, 'Player 1'),
+                            playedCardsPile: [...playedCardsPile.slice(0, playedCardsPile.length), played_card, ...playedCardsPile.slice(playedCardsPile.length)],
+                            player1Deck: [...player1Deck.slice(0, removeIndex), ...player1Deck.slice(removeIndex + 1)],
+                            player2Deck: [...player2Deck.slice(0, player2Deck.length), drawCard1, drawCard2, ...player2Deck.slice(player2Deck.length)],
+                            currentColor: colorOfPlayedCard,
+                            currentNumber: 252,
+                            drawCardPile: [...copiedDrawCardPileArray]
+                        })
                     }
                     else {
                         //remove the played card from player2's deck and add it to playedCardsPile (immutably)
@@ -257,15 +344,16 @@ const Game = () => {
                         //pull out last two elements from it
                         const drawCard1 = copiedDrawCardPileArray.pop()
                         const drawCard2 = copiedDrawCardPileArray.pop()
-                        //set new state
-                        setGameOver(checkGameOver(player2Deck))
-                        setWinner(checkWinner(player1Deck, 'Player 2'))
-                        setPlayedCardsPile([...playedCardsPile.slice(0, playedCardsPile.length), played_card, ...playedCardsPile.slice(playedCardsPile.length)])
-                        setPlayer2Deck([...player2Deck.slice(0, removeIndex), ...player2Deck.slice(removeIndex + 1)])
-                        setPlayer1Deck([...player1Deck.slice(0, player1Deck.length), drawCard1, drawCard2, ...player1Deck.slice(player1Deck.length)])
-                        setCurrentColor(colorOfPlayedCard)
-                        setCurrentNumber(252)
-                        setDrawCardPile([...copiedDrawCardPileArray])
+                        socket.emit('updateGameState', {
+                            gameOver: checkGameOver(player2Deck),
+                            winner: checkWinner(player2Deck, 'Player 2'),
+                            playedCardsPile: [...playedCardsPile.slice(0, playedCardsPile.length), played_card, ...playedCardsPile.slice(playedCardsPile.length)],
+                            player2Deck: [...player2Deck.slice(0, removeIndex), ...player2Deck.slice(removeIndex + 1)],
+                            player1Deck: [...player1Deck.slice(0, player1Deck.length), drawCard1, drawCard2, ...player1Deck.slice(player1Deck.length)],
+                            currentColor: colorOfPlayedCard,
+                            currentNumber: 252,
+                            drawCardPile: [...copiedDrawCardPileArray]
+                        })
                     }
                 }
                 //check for number match - if draw 2 card played on draw 2 card
@@ -282,15 +370,17 @@ const Game = () => {
                         //pull out last two elements from it
                         const drawCard1 = copiedDrawCardPileArray.pop()
                         const drawCard2 = copiedDrawCardPileArray.pop()
-                        //set new state
-                        setGameOver(checkGameOver(player1Deck))
-                        setWinner(checkWinner(player1Deck, 'Player 1'))
-                        setPlayedCardsPile([...playedCardsPile.slice(0, playedCardsPile.length), played_card, ...playedCardsPile.slice(playedCardsPile.length)])
-                        setPlayer1Deck([...player1Deck.slice(0, removeIndex), ...player1Deck.slice(removeIndex + 1)])
-                        setPlayer2Deck([...player2Deck.slice(0, player2Deck.length), drawCard1, drawCard2, ...player2Deck.slice(player2Deck.length)])
-                        setCurrentColor(colorOfPlayedCard)
-                        setCurrentNumber(252)
-                        setDrawCardPile([...copiedDrawCardPileArray])
+                        //send new state to server
+                        socket.emit('updateGameState', {
+                            gameOver: checkGameOver(player1Deck),
+                            winner: checkWinner(player1Deck, 'Player 1'),
+                            playedCardsPile: [...playedCardsPile.slice(0, playedCardsPile.length), played_card, ...playedCardsPile.slice(playedCardsPile.length)],
+                            player1Deck: [...player1Deck.slice(0, removeIndex), ...player1Deck.slice(removeIndex + 1)],
+                            player2Deck: [...player2Deck.slice(0, player2Deck.length), drawCard1, drawCard2, ...player2Deck.slice(player2Deck.length)],
+                            currentColor: colorOfPlayedCard,
+                            currentNumber: 252,
+                            drawCardPile: [...copiedDrawCardPileArray]
+                        })
                     }
                     else {
                         //remove the played card from player2's deck and add it to playedCardsPile (immutably)
@@ -302,15 +392,17 @@ const Game = () => {
                         //pull out last two elements from it
                         const drawCard1 = copiedDrawCardPileArray.pop()
                         const drawCard2 = copiedDrawCardPileArray.pop()
-                        //set new state
-                        setGameOver(checkGameOver(player2Deck))
-                        setWinner(checkWinner(player1Deck, 'Player 2'))
-                        setPlayedCardsPile([...playedCardsPile.slice(0, playedCardsPile.length), played_card, ...playedCardsPile.slice(playedCardsPile.length)])
-                        setPlayer2Deck([...player2Deck.slice(0, removeIndex), ...player2Deck.slice(removeIndex + 1)])
-                        setPlayer1Deck([...player1Deck.slice(0, player1Deck.length), drawCard1, drawCard2, ...player1Deck.slice(player1Deck.length)])
-                        setCurrentColor(colorOfPlayedCard)
-                        setCurrentNumber(252)
-                        setDrawCardPile([...copiedDrawCardPileArray])
+                        //send new state to server
+                        socket.emit('updateGameState', {
+                            gameOver: checkGameOver(player2Deck),
+                            winner: checkWinner(player2Deck, 'Player 2'),
+                            playedCardsPile: [...playedCardsPile.slice(0, playedCardsPile.length), played_card, ...playedCardsPile.slice(playedCardsPile.length)],
+                            player2Deck: [...player2Deck.slice(0, removeIndex), ...player2Deck.slice(removeIndex + 1)],
+                            player1Deck: [...player1Deck.slice(0, player1Deck.length), drawCard1, drawCard2, ...player1Deck.slice(player1Deck.length)],
+                            currentColor: colorOfPlayedCard,
+                            currentNumber: 252,
+                            drawCardPile: [...copiedDrawCardPileArray]
+                        })
                     }
                 }
                 //if no color or number match, invalid move - do not update state
@@ -328,14 +420,16 @@ const Game = () => {
                     //remove the played card from player1's deck and add it to playedCardsPile (immutably)
                     const removeIndex = player1Deck.indexOf(played_card)
                     //then update turn, currentColor and currentNumber
-                    //set new state
-                    setGameOver(checkGameOver(player1Deck))
-                    setWinner(checkWinner(player1Deck, 'Player 1'))
-                    setTurn('Player 2')
-                    setPlayedCardsPile([...playedCardsPile.slice(0, playedCardsPile.length), played_card, ...playedCardsPile.slice(playedCardsPile.length)])
-                    setPlayer1Deck([...player1Deck.slice(0, removeIndex), ...player1Deck.slice(removeIndex + 1)])
-                    setCurrentColor(newColor)
-                    setCurrentNumber(300)
+                    //send new state to server
+                    socket.emit('updateGameState', {
+                        gameOver: checkGameOver(player1Deck),
+                        winner: checkWinner(player1Deck, 'Player 1'),
+                        turn: 'Player 2',
+                        playedCardsPile: [...playedCardsPile.slice(0, playedCardsPile.length), played_card, ...playedCardsPile.slice(playedCardsPile.length)],
+                        player1Deck: [...player1Deck.slice(0, removeIndex), ...player1Deck.slice(removeIndex + 1)],
+                        currentColor: newColor,
+                        currentNumber: 300
+                    })
                 }
                 else {
                     //ask for new color
@@ -343,14 +437,15 @@ const Game = () => {
                     //remove the played card from player2's deck and add it to playedCardsPile (immutably)
                     const removeIndex = player2Deck.indexOf(played_card)
                     //then update turn, currentColor and currentNumber
-                    //set new state
-                    setGameOver(checkGameOver(player2Deck))
-                    setWinner(checkWinner(player1Deck, 'Player 1'))
-                    setTurn('Player 1')
-                    setPlayedCardsPile([...playedCardsPile.slice(0, playedCardsPile.length), played_card, ...playedCardsPile.slice(playedCardsPile.length)])
-                    setPlayer2Deck([...player2Deck.slice(0, removeIndex), ...player2Deck.slice(removeIndex + 1)])
-                    setCurrentColor(newColor)
-                    setCurrentNumber(300)
+                    socket.emit('updateGameState', {
+                        gameOver: checkGameOver(player2Deck),
+                        winner: checkWinner(player2Deck, 'Player 2'),
+                        turn: 'Player 2',
+                        playedCardsPile: [...playedCardsPile.slice(0, playedCardsPile.length), played_card, ...playedCardsPile.slice(playedCardsPile.length)],
+                        player2Deck: [...player2Deck.slice(0, removeIndex), ...player2Deck.slice(removeIndex + 1)],
+                        currentColor: newColor,
+                        currentNumber: 300
+                    })
                 }
                 break;
             }
@@ -371,15 +466,17 @@ const Game = () => {
                     const drawCard3 = copiedDrawCardPileArray.pop()
                     const drawCard4 = copiedDrawCardPileArray.pop()
                     //then update currentColor and currentNumber - turn will remain same
-                    //set new state
-                    setGameOver(checkGameOver(player1Deck))
-                    setWinner(checkWinner(player1Deck, 'Player 1'))
-                    setPlayedCardsPile([...playedCardsPile.slice(0, playedCardsPile.length), played_card, ...playedCardsPile.slice(playedCardsPile.length)])
-                    setPlayer1Deck([...player1Deck.slice(0, removeIndex), ...player1Deck.slice(removeIndex + 1)])
-                    setPlayer2Deck([...player2Deck.slice(0, player2Deck.length), drawCard1, drawCard2, drawCard3, drawCard4, ...player2Deck.slice(player2Deck.length)])
-                    setCurrentColor(newColor)
-                    setCurrentNumber(600)
-                    setDrawCardPile([...copiedDrawCardPileArray])
+                    //send new state to server
+                    socket.emit('updateGameState', {
+                        gameOver: checkGameOver(player1Deck),
+                        winner: checkWinner(player1Deck, 'Player 1'),
+                        playedCardsPile: [...playedCardsPile.slice(0, playedCardsPile.length), played_card, ...playedCardsPile.slice(playedCardsPile.length)],
+                        player1Deck: [...player1Deck.slice(0, removeIndex), ...player1Deck.slice(removeIndex + 1)],
+                        player2Deck: [...player2Deck.slice(0, player2Deck.length), drawCard1, drawCard2, drawCard3, drawCard4, ...player2Deck.slice(player2Deck.length)],
+                        currentColor: newColor,
+                        currentNumber: 600,
+                        drawCardPile: [...copiedDrawCardPileArray]
+                    })
                 }
                 else {
                     //ask for new color
@@ -395,15 +492,17 @@ const Game = () => {
                     const drawCard3 = copiedDrawCardPileArray.pop()
                     const drawCard4 = copiedDrawCardPileArray.pop()
                     //then update currentColor and currentNumber - turn will remain same
-                    //set new state
-                    setGameOver(checkGameOver(player2Deck))
-                    setWinner(checkWinner(player1Deck, 'Player 1'))
-                    setPlayedCardsPile([...playedCardsPile.slice(0, playedCardsPile.length), played_card, ...playedCardsPile.slice(playedCardsPile.length)])
-                    setPlayer2Deck([...player2Deck.slice(0, removeIndex), ...player2Deck.slice(removeIndex + 1)])
-                    setPlayer1Deck([...player1Deck.slice(0, player1Deck.length), drawCard1, drawCard2, drawCard3, drawCard4, ...player1Deck.slice(player1Deck.length)])
-                    setCurrentColor(newColor)
-                    setCurrentNumber(600)
-                    setDrawCardPile([...copiedDrawCardPileArray])
+                    //send new state to server
+                    socket.emit('updateGameState', {
+                        gameOver: checkGameOver(player2Deck),
+                        winner: checkWinner(player2Deck, 'Player 2'),
+                        playedCardsPile: [...playedCardsPile.slice(0, playedCardsPile.length), played_card, ...playedCardsPile.slice(playedCardsPile.length)],
+                        player2Deck: [...player2Deck.slice(0, removeIndex), ...player2Deck.slice(removeIndex + 1)],
+                        player1Deck: [...player1Deck.slice(0, player1Deck.length), drawCard1, drawCard2, drawCard3, drawCard4, ...player1Deck.slice(player1Deck.length)],
+                        currentColor: newColor,
+                        currentNumber: 600,
+                        drawCardPile: [...copiedDrawCardPileArray]
+                    })
                 }
             }
             break;
@@ -425,10 +524,13 @@ const Game = () => {
             let numberOfDrawnCard = drawCard.charAt(0)
             if(colorOfDrawnCard === currentColor && (drawCard === 'skipR' || drawCard === 'skipG' || drawCard === 'skipB' || drawCard === 'skipY')) {
                 alert(`You drew ${drawCard}. It was played for you.`)
-                //set new state
-                setPlayedCardsPile([...playedCardsPile.slice(0, playedCardsPile.length), drawCard, ...playedCardsPile.slice(playedCardsPile.length)])
-                setCurrentColor(colorOfDrawnCard)
-                setCurrentNumber(404)
+                //send new state to server
+                socket.emit('updateGameState', {
+                    playedCardsPile: [...playedCardsPile.slice(0, playedCardsPile.length), drawCard, ...playedCardsPile.slice(playedCardsPile.length)],
+                    currentColor: colorOfDrawnCard,
+                    currentNumber: 404,
+                    drawCardPile: [...copiedDrawCardPileArray]
+                })
             }
             else if(colorOfDrawnCard === currentColor && (drawCard === 'D2R' || drawCard === 'D2G' || drawCard === 'D2B' || drawCard === 'D2Y')) {
                 alert(`You drew ${drawCard}. It was played for you.`)
@@ -438,28 +540,32 @@ const Game = () => {
                 //pull out last two elements from it
                 const drawCard1 = copiedDrawCardPileArray.pop()
                 const drawCard2 = copiedDrawCardPileArray.pop()
-                //set new state
-                setPlayedCardsPile([...playedCardsPile.slice(0, playedCardsPile.length), drawCard, ...playedCardsPile.slice(playedCardsPile.length)])
-                setPlayer2Deck([...player2Deck.slice(0, player2Deck.length), drawCard1, drawCard2, ...player2Deck.slice(player2Deck.length)])
-                setCurrentColor(colorOfDrawnCard)
-                setCurrentNumber(252)
-                setDrawCardPile([...copiedDrawCardPileArray])
+                //send new state to server
+                socket.emit('updateGameState', {
+                    playedCardsPile: [...playedCardsPile.slice(0, playedCardsPile.length), drawCard, ...playedCardsPile.slice(playedCardsPile.length)],
+                    player2Deck: [...player2Deck.slice(0, player2Deck.length), drawCard1, drawCard2, ...player2Deck.slice(player2Deck.length)],
+                    currentColor: colorOfDrawnCard,
+                    currentNumber: 252,
+                    drawCardPile: [...copiedDrawCardPileArray]
+                })
             }
             else if(drawCard === 'W') {
                 alert(`You drew ${drawCard}. It was played for you.`)
                 //ask for new color
                 const newColor = prompt('Enter first letter of new color in uppercase (R/G/B/Y)')
-                //set new state
-                setTurn('Player 2')
-                setPlayedCardsPile([...playedCardsPile.slice(0, playedCardsPile.length), drawCard, ...playedCardsPile.slice(playedCardsPile.length)])
-                setCurrentColor(newColor)
-                setCurrentNumber(300)
+                //send new state to server
+                socket.emit('updateGameState', {
+                    playedCardsPile: [...playedCardsPile.slice(0, playedCardsPile.length), drawCard, ...playedCardsPile.slice(playedCardsPile.length)],
+                    currentColor: newColor,
+                    currentNumber: 300,
+                    drawCardPile: [...copiedDrawCardPileArray]
+                })
             }
             else if(drawCard === 'D4W') {
                 alert(`You drew ${drawCard}. It was played for you.`)
                 //ask for new color
                 const newColor = prompt('Enter first letter of new color in uppercase (R/G/B/Y)')
-                //remove 2 new cards from drawCardPile and add them to player1's deck (immutably)
+                //remove 2 new cards from drawCardPile and add them to player2's deck (immutably)
                 //make a copy of drawCardPile array
                 const copiedDrawCardPileArray = [...drawCardPile]
                 //pull out last four elements from it
@@ -467,30 +573,36 @@ const Game = () => {
                 const drawCard2 = copiedDrawCardPileArray.pop()
                 const drawCard3 = copiedDrawCardPileArray.pop()
                 const drawCard4 = copiedDrawCardPileArray.pop()
-                //set new state
-                setPlayedCardsPile([...playedCardsPile.slice(0, playedCardsPile.length), drawCard, ...playedCardsPile.slice(playedCardsPile.length)])
-                setPlayer1Deck([...player1Deck.slice(0, player1Deck.length), drawCard1, drawCard2, drawCard3, drawCard4, ...player1Deck.slice(player1Deck.length)])
-                setCurrentColor(newColor)
-                setCurrentNumber(600)
-                setDrawCardPile([...copiedDrawCardPileArray])
+                //send new state to server
+                socket.emit('updateGameState', {
+                    playedCardsPile: [...playedCardsPile.slice(0, playedCardsPile.length), drawCard, ...playedCardsPile.slice(playedCardsPile.length)],
+                    player2Deck: [...player2Deck.slice(0, player2Deck.length), drawCard1, drawCard2, drawCard3, drawCard4, ...player2Deck.slice(player2Deck.length)],
+                    currentColor: newColor,
+                    currentNumber: 600,
+                    drawCardPile: [...copiedDrawCardPileArray]
+                })
             }
             //if not action card - check if drawn card is playable
             else if(numberOfDrawnCard === currentNumber || colorOfDrawnCard === currentColor) {
                 alert(`You drew ${drawCard}. It was played for you.`)
-                //set new state
-                setTurn('Player 2')
-                setPlayedCardsPile([...playedCardsPile.slice(0, playedCardsPile.length), drawCard, ...playedCardsPile.slice(playedCardsPile.length)])
-                setCurrentColor(colorOfDrawnCard)
-                setCurrentNumber(numberOfDrawnCard)
-                setDrawCardPile([...copiedDrawCardPileArray])
+                //send new state to server
+                socket.emit('updateGameState', {
+                    turn: 'Player 2',
+                    playedCardsPile: [...playedCardsPile.slice(0, playedCardsPile.length), drawCard, ...playedCardsPile.slice(playedCardsPile.length)],
+                    currentColor: colorOfDrawnCard,
+                    currentNumber: numberOfDrawnCard,
+                    drawCardPile: [...copiedDrawCardPileArray]
+                })
             }
             //else add the drawn card to player1's deck
             else {
                 alert(`You drew ${drawCard}.`)
-                //set new state
-                setTurn('Player 2')
-                setPlayer1Deck([...player1Deck.slice(0, player1Deck.length), drawCard, ...player1Deck.slice(player1Deck.length)])
-                setDrawCardPile([...copiedDrawCardPileArray])
+                //send new state to server
+                socket.emit('updateGameState', {
+                    turn: 'Player 2',
+                    player1Deck: [...player1Deck.slice(0, player1Deck.length), drawCard, ...player1Deck.slice(player1Deck.length)],
+                    drawCardPile: [...copiedDrawCardPileArray]
+                })
             }
         }
         else {
@@ -504,35 +616,42 @@ const Game = () => {
             let numberOfDrawnCard = drawCard.charAt(0)
             if(colorOfDrawnCard === currentColor && (drawCard === 'skipR' || drawCard === 'skipG' || drawCard === 'skipB' || drawCard === 'skipY')) {
                 alert(`You drew ${drawCard}. It was played for you.`)
-                //set new state
-                setPlayedCardsPile([...playedCardsPile.slice(0, playedCardsPile.length), drawCard, ...playedCardsPile.slice(playedCardsPile.length)])
-                setCurrentColor(colorOfDrawnCard)
-                setCurrentNumber(404)
+                //send new state to server
+                socket.emit('updateGameState', {
+                    playedCardsPile: [...playedCardsPile.slice(0, playedCardsPile.length), drawCard, ...playedCardsPile.slice(playedCardsPile.length)],
+                    currentColor: colorOfDrawnCard,
+                    currentNumber: 404,
+                    drawCardPile: [...copiedDrawCardPileArray]
+                })
             }
             else if(colorOfDrawnCard === currentColor && (drawCard === 'D2R' || drawCard === 'D2G' || drawCard === 'D2B' || drawCard === 'D2Y')) {
                 alert(`You drew ${drawCard}. It was played for you.`)
-                //remove 2 new cards from drawCardPile and add them to player2's deck (immutably)
+                //remove 2 new cards from drawCardPile and add them to player1's deck (immutably)
                 //make a copy of drawCardPile array
                 const copiedDrawCardPileArray = [...drawCardPile]
                 //pull out last two elements from it
                 const drawCard1 = copiedDrawCardPileArray.pop()
                 const drawCard2 = copiedDrawCardPileArray.pop()
-                //set new state
-                setPlayedCardsPile([...playedCardsPile.slice(0, playedCardsPile.length), drawCard, ...playedCardsPile.slice(playedCardsPile.length)])
-                setPlayer2Deck([...player2Deck.slice(0, player2Deck.length), drawCard1, drawCard2, ...player2Deck.slice(player2Deck.length)])
-                setCurrentColor(colorOfDrawnCard)
-                setCurrentNumber(252)
-                setDrawCardPile([...copiedDrawCardPileArray])
+                //send new state to server
+                socket.emit('updateGameState', {
+                    playedCardsPile: [...playedCardsPile.slice(0, playedCardsPile.length), drawCard, ...playedCardsPile.slice(playedCardsPile.length)],
+                    player1Deck: [...player1Deck.slice(0, player1Deck.length), drawCard1, drawCard2, ...player1Deck.slice(player1Deck.length)],
+                    currentColor: colorOfDrawnCard,
+                    currentNumber: 252,
+                    drawCardPile: [...copiedDrawCardPileArray]
+                })
             }
             else if(drawCard === 'W') {
                 alert(`You drew ${drawCard}. It was played for you.`)
                 //ask for new color
                 const newColor = prompt('Enter first letter of new color in uppercase (R/G/B/Y)')
-                //set new state
-                setTurn('Player 1')
-                setPlayedCardsPile([...playedCardsPile.slice(0, playedCardsPile.length), drawCard, ...playedCardsPile.slice(playedCardsPile.length)])
-                setCurrentColor(newColor)
-                setCurrentNumber(300)
+                //send new state to server
+                socket.emit('updateGameState', {
+                    playedCardsPile: [...playedCardsPile.slice(0, playedCardsPile.length), drawCard, ...playedCardsPile.slice(playedCardsPile.length)],
+                    currentColor: newColor,
+                    currentNumber: 300,
+                    drawCardPile: [...copiedDrawCardPileArray]
+                })
             }
             else if(drawCard === 'D4W') {
                 alert(`You drew ${drawCard}. It was played for you.`)
@@ -546,38 +665,49 @@ const Game = () => {
                 const drawCard2 = copiedDrawCardPileArray.pop()
                 const drawCard3 = copiedDrawCardPileArray.pop()
                 const drawCard4 = copiedDrawCardPileArray.pop()
-                //set new state
-                setPlayedCardsPile([...playedCardsPile.slice(0, playedCardsPile.length), drawCard, ...playedCardsPile.slice(playedCardsPile.length)])
-                setPlayer1Deck([...player1Deck.slice(0, player1Deck.length), drawCard1, drawCard2, drawCard3, drawCard4, ...player1Deck.slice(player1Deck.length)])
-                setCurrentColor(newColor)
-                setCurrentNumber(600)
-                setDrawCardPile([...copiedDrawCardPileArray])
+                //send new state to server
+                socket.emit('updateGameState', {
+                    playedCardsPile: [...playedCardsPile.slice(0, playedCardsPile.length), drawCard, ...playedCardsPile.slice(playedCardsPile.length)],
+                    player1Deck: [...player1Deck.slice(0, player1Deck.length), drawCard1, drawCard2, drawCard3, drawCard4, ...player1Deck.slice(player1Deck.length)],
+                    currentColor: newColor,
+                    currentNumber: 600,
+                    drawCardPile: [...copiedDrawCardPileArray]
+                })
             }
             //if not action card - check if drawn card is playable
             else if(numberOfDrawnCard === currentNumber || colorOfDrawnCard === currentColor) {
                 alert(`You drew ${drawCard}. It was played for you.`)
-                //set new state
-                setTurn('Player 1')
-                setPlayedCardsPile([...playedCardsPile.slice(0, playedCardsPile.length), drawCard, ...playedCardsPile.slice(playedCardsPile.length)])
-                setCurrentColor(colorOfDrawnCard)
-                setCurrentNumber(numberOfDrawnCard)
-                setDrawCardPile([...copiedDrawCardPileArray])
+                //send new state to server
+                socket.emit('updateGameState', {
+                    turn: 'Player 1',
+                    playedCardsPile: [...playedCardsPile.slice(0, playedCardsPile.length), drawCard, ...playedCardsPile.slice(playedCardsPile.length)],
+                    currentColor: colorOfDrawnCard,
+                    currentNumber: numberOfDrawnCard,
+                    drawCardPile: [...copiedDrawCardPileArray]
+                })
             }
             //else add the drawn card to player2's deck
             else {
                 alert(`You drew ${drawCard}.`)
-                //set new state
-                setTurn('Player 1')
-                setPlayer2Deck([...player2Deck.slice(0, player2Deck.length), drawCard, ...player2Deck.slice(player2Deck.length)])
-                setDrawCardPile([...copiedDrawCardPileArray])
+                //send new state to server
+                socket.emit('updateGameState', {
+                    turn: 'Player 1',
+                    player2Deck: [...player2Deck.slice(0, player2Deck.length), drawCard, ...player2Deck.slice(player2Deck.length)],
+                    drawCardPile: [...copiedDrawCardPileArray]
+                })
             }
         }
     }
     
     return (
-        gameOver ? <div><h1>GAME FORFEITED</h1>{winner !== '' && <><h1>GAME OVER</h1><h2>{winner} wins!</h2></>}<a href='/'>Home</a></div> :
+        (!roomFull) ? <>
+
+        {users.length===2 ? <>
+
+        {gameOver ? <div>{winner !== '' && <><h1>GAME OVER</h1><h2>{winner} wins!</h2></>}<a href='/'>Home</a></div> :
         <div className='Game'>
             <h1>Turn: {turn}</h1>
+            {currentUser === 'Player 1' && 
             <div className='player1Deck' style={turn === 'Player 1' ? null : {pointerEvents: 'none'}}>
                 {player1Deck.map((item) => (
                     <span
@@ -586,14 +716,16 @@ const Game = () => {
                         {item}
                     </span>
                 ))}
-            </div>
+                <button onClick={onCardDrawnHandler}>DRAW CARD</button>
+            </div> }
             <hr />
             <div>
                 <h1>Current Card: {playedCardsPile[playedCardsPile.length-1]}</h1>
                 <h2>Current Color: {currentColor}</h2>
-                <button onClick={onCardDrawnHandler}>DRAW CARD</button>
+                
             </div>
             <hr />
+            {currentUser === 'Player 2' && 
             <div className='player2Deck' style={turn === 'Player 1' ? {pointerEvents: 'none'} : null}>
                 {player2Deck.map((item) => (
                     <span
@@ -602,9 +734,21 @@ const Game = () => {
                         {item}
                     </span>
                 ))}
+                <button onClick={onCardDrawnHandler}>DRAW CARD</button>
+            </div> }
+            <hr />
+            <div>
+                <h1>Users in room:</h1>
+                {users.map(user => {
+                    return <h6>{user.name}</h6>
+                })}
             </div>
             <a href='/'>Home</a>
-        </div>
+        </div>}
+
+        </> : <h1>Waiting for other player</h1> }
+
+        </> : <h1>Room full</h1>
     )
 }
 

client/src/components/Homepage.js

@@ -0,0 +1,16 @@
+import React, { useState } from 'react'
+import { Link } from 'react-router-dom'
+
+const Homepage = () => {
+    const [roomCode, setRoomCode] = useState('')
+
+    return (
+        <div className='Homepage'>
+            <h1>UNO</h1>
+            <div><input type='text' placeholder='Room' onChange={(event) => setRoomCode(event.target.value)} /></div>
+            <Link to={`/play?roomCode=${roomCode}`}><button>START GAME</button></Link>
+        </div>
+    )
+}
+
+export default Homepage

package.json

@@ -1,38 +1,25 @@
 {
   "name": "uno-online",
-  "version": "0.1.0",
-  "private": true,
-  "dependencies": {
-    "@testing-library/jest-dom": "^5.11.9",
-    "@testing-library/react": "^11.2.5",
-    "@testing-library/user-event": "^12.7.0",
-    "react": "^17.0.1",
-    "react-dom": "^17.0.1",
-    "react-router-dom": "^5.2.0",
-    "react-scripts": "4.0.2"
-  },
+  "version": "1.0.0",
+  "description": "Online multiplayer card game",
+  "main": "server.js",
   "scripts": {
-    "start": "react-scripts start",
-    "build": "react-scripts build",
-    "test": "react-scripts test",
-    "eject": "react-scripts eject"
+    "start": "node server",
+    "client": "npm start --prefix client"
   },
-  "eslintConfig": {
-    "extends": [
-      "react-app",
-      "react-app/jest"
-    ]
+  "repository": {
+    "type": "git",
+    "url": "git+https://github.com/mizanxali/uno-online.git"
   },
-  "browserslist": {
-    "production": [
-      ">0.2%",
-      "not dead",
-      "not op_mini all"
-    ],
-    "development": [
-      "last 1 chrome version",
-      "last 1 firefox version",
-      "last 1 safari version"
-    ]
+  "author": "Mizan Ali",
+  "license": "ISC",
+  "bugs": {
+    "url": "https://github.com/mizanxali/uno-online/issues"
+  },
+  "homepage": "https://github.com/mizanxali/uno-online#readme",
+  "dependencies": {
+    "cors": "^2.8.5",
+    "express": "^4.17.1",
+    "socket.io": "^3.1.1"
   }
 }

server.js

@@ -0,0 +1,56 @@
+const express = require('express')
+const socketio = require('socket.io')
+const http = require('http')
+const cors = require('cors')
+const { addUser, removeUser, getUser, getUsersInRoom } = require('./users')
+
+const PORT = process.env.PORT || 5000
+
+const app = express()
+const server = http.createServer(app)
+const io = socketio(server)
+
+app.use(cors())
+
+io.on('connection', socket => {
+    socket.on('join', (payload, callback) => {
+        let numberOfUsersInRoom = getUsersInRoom(payload.room).length
+
+        const { error, newUser} = addUser({
+            id: socket.id,
+            name: numberOfUsersInRoom===0 ? 'Player 1' : 'Player 2',
+            room: payload.room
+        })
+
+        if(error)
+            return callback(error)
+
+        socket.join(newUser.room)
+
+        io.to(newUser.room).emit('roomData', {room: newUser.room, users: getUsersInRoom(newUser.room)})
+        socket.emit('currentUserData', {name: newUser.name})
+        callback()
+    })
+
+    socket.on('initGameState', gameState => {
+        const user = getUser(socket.id)
+        if(user)
+            io.to(user.room).emit('initGameState', gameState)
+    })
+
+    socket.on('updateGameState', gameState => {
+        const user = getUser(socket.id)
+        if(user)
+            io.to(user.room).emit('updateGameState', gameState)
+    })
+
+    socket.on('disconnect', () => {
+        const user = removeUser(socket.id)
+        if(user)
+            io.to(user.room).emit('roomData', {room: user.room, users: getUsersInRoom(user.room)})
+    })
+})
+
+server.listen(PORT, () => {
+    console.log(`Server running on port ${PORT}`)
+})

src/components/Homepage.js

@@ -1,13 +0,0 @@
-import React from 'react'
-import { Link } from 'react-router-dom'
-
-const Homepage = () => {
-    return (
-        <div className='Homepage'>
-            <h1>UNO</h1>
-            <Link to='/play'><button>START GAME</button></Link>
-        </div>
-    )
-}
-
-export default Homepage

users.js

@@ -0,0 +1,28 @@
+ const users = []
+
+ const addUser = ({id, name, room}) => {
+    const numberOfUsersInRoom = users.filter(user => user.room === room).length
+    if(numberOfUsersInRoom === 2)
+    return { error: 'Room full' }
+
+    const newUser = { id, name, room }
+    users.push(newUser)
+    return { newUser }
+}
+
+const removeUser = id => {
+    const removeIndex = users.findIndex(user => user.id === id)
+
+    if(removeIndex!==-1)
+        return users.splice(removeIndex, 1)[0]
+}
+
+const getUser = id => {
+    return users.find(user => user.id === id)
+}
+
+const getUsersInRoom = room => {
+    return users.filter(user => user.room === room)
+}
+
+module.exports = { addUser, removeUser, getUser, getUsersInRoom }