Add Random Screen Name Functionality

Video Lecture

Add Random Screen Name Functionality Add Random Screen Name Functionality

src/server/screenName.ts

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type ScreenName = {
    name: string
    abbreviation: string
}

src/server/randomScreenNameGenerator.ts

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export default class randomScreenNameGenerator {
    private animals = ['Cat', 'Dog', 'Bird', 'Tiger', 'Giraffe', 'Elephant', 'Koala', 'Bee', 'Fly', 'Fish', 'Frog'];
    private colours = ['Red', 'Green', 'Blue', 'Yellow', 'Orange', 'Purple'];

    constructor() {
    }

    public generateRandomScreenName() {
        let colour = this.colours[Math.floor(Math.random() * this.colours.length)]
        let animal = this.animals[Math.floor(Math.random() * this.animals.length)]

        let screenName: ScreenName = { name: colour + " " + animal, abbreviation: colour[0] + animal[0] }

        return screenName
    }
}

src/server/server.ts

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import express from "express"
import path from "path"
import http from "http"
import socketIO from "socket.io"
import LuckyNumbersGame from "./luckyNumbersGame"
import RandomScreenNameGenerator from "./randomScreenNameGenerator"

const port: number = 3000

class App {
    private server: http.Server
    private port: number

    private io: socketIO.Server
    private game: LuckyNumbersGame
    private randomScreenNameGenerator: RandomScreenNameGenerator

    constructor(port: number) {
        this.port = port

        const app = express()
        app.use(express.static(path.join(__dirname, '../client')))
        app.use('/jquery', express.static(path.join(__dirname, '../../node_modules/jquery/dist')))
        app.use('/bootstrap', express.static(path.join(__dirname, '../../node_modules/bootstrap/dist')))

        this.server = new http.Server(app)
        this.io = socketIO(this.server);

        this.game = new LuckyNumbersGame()

        this.randomScreenNameGenerator = new RandomScreenNameGenerator();

        this.io.on('connection', (socket: socketIO.Socket) => {
            console.log('a user connected : ' + socket.id)

            let screenName: ScreenName = this.randomScreenNameGenerator.generateRandomScreenName()

            socket.emit("screenName", screenName)

            socket.on('disconnect', function () {
                console.log('socket disconnected : ' + socket.id);
            });

            socket.on('chatMessage', function (chatMessage: ChatMessage) {
                socket.broadcast.emit('chatMessage', chatMessage)
            });
        })
    }

    public Start() {
        this.server.listen(this.port)
        console.log( `Server listening on port ${this.port}.` )
    }
}

new App(port).Start()

src/client/client.ts

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type ChatMessage = {
    message: string
    from: string
}

type ScreenName = {
    name: string
    abbreviation: string
}

class Client {
    private socket: SocketIOClient.Socket
    private screenName:ScreenName

    constructor() {
        this.socket = io();


        this.socket.on("connect", function () {
            console.log("connect")
        })

        this.socket.on("disconnect", function (message: any) {
            console.log("disconnect " + message)
            location.reload();
        })

        this.socket.on("screenName", (screenName: ScreenName) => {
            this.screenName = screenName
            $(".screenName").text(this.screenName.name)
        })

        this.socket.on("chatMessage", (chatMessage: ChatMessage) => {
            $("#messages").append("<li><span class='float-right'><span class='circle'>" + chatMessage.from + "</span></span><div class='otherMessage'>" + chatMessage.message + "</div></li>")
            this.scrollChatWindow()
        })

        $(document).ready(() => {
            $('#messageText').keypress((e) => {
                var key = e.which;
                if (key == 13)  // the enter key code
                {
                    this.sendMessage()
                    return false;
                }
            });
        })
    }

    private scrollChatWindow = () => {
        $('#messages').animate({
            scrollTop: $('#messages li:last-child').position().top
        }, 500);
        setTimeout(() => {
            let messagesLength = $("#messages li");
            if (messagesLength.length > 10) {
                messagesLength.eq(0).remove();
            }
        }, 500)
    }

    public sendMessage() {
        let messageText = $("#messageText").val();
        if (messageText.toString().length > 0) {

            this.socket.emit("chatMessage", <ChatMessage>{ message: messageText, from: this.screenName.abbreviation })

            $("#messages").append("<li><span class='float-left'><span class='circle'>" + this.screenName.abbreviation + "</span></span><div class='myMessage'>" + messageText + "</div></li>")
            this.scrollChatWindow()

            $("#messageText").val("");
        }
    }

    public showGame(id: number) {
        switch (id) {
            case 0:
                $("#gamePanel1").fadeOut(100)
                $("#gamePanel2").fadeOut(100)
                $("#gamePanel0").delay(100).fadeIn(100)
                break;
            case 1:
                $("#gamePanel0").fadeOut(100)
                $("#gamePanel2").fadeOut(100)
                $("#gamePanel1").delay(100).fadeIn(100)
                break;
            case 2:
                $("#gamePanel0").fadeOut(100)
                $("#gamePanel1").fadeOut(100)
                $("#gamePanel2").delay(100).fadeIn(100)
                break;
        }
    }
}

const client = new Client();

dist/client/index.html

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<!DOCTYPE html>
<html lang="en">

<head>

    <meta charset="utf-8">
    <title>TypeScript Socket.IO Course</title>
    <meta name="viewport" content="width=device-width, initial-scale=1">
    <link rel="stylesheet" href="bootstrap/css/bootstrap.min.css">

    <style>
        .gamePanel {
            position: relative;
            border: solid 1px gray;
            height: 382px;
            border-radius: 0px 20px 4px 20px;
            box-shadow: 15px 10px #dddddd;
        }

        #gamePanel0 {
            display: block;
            background: linear-gradient(180deg, rgba(195, 112, 34, 0.164) 0%, rgba(156, 200, 105, 0.495) 100%);
        }

        #gamePanel1 {
            display: none;
            background: linear-gradient(56deg, rgba(225, 238, 255, 0.492) 0%, rgba(122, 67, 250, 0.495) 100%);
        }

        #gamePanel2 {
            display: none;
            background: linear-gradient(56deg, rgba(235, 204, 32, 0.492) 0%, rgba(251, 188, 106, 0.495) 100%);
        }

        .chatPanel {
            border: solid 1px gray;
            border-radius: 20px 0px 4px 4px;
            box-shadow: 15px 10px #dddddd;
            background: rgb(34, 193, 195);
            background: linear-gradient(56deg, rgba(34, 193, 195, 0.49193275943189773) 0%, rgba(253, 187, 45, 0.494733879880077) 100%);
            position: relative;
        }

        .chatMessageInputDiv {
            position: absolute;
            bottom: 0px;
            width: 100%;
        }

        .messages {
            padding-left: 0;
            overflow: hidden;
            height: 340px;
            margin-bottom: 40px;
        }

        .messages li {
            list-style-type: none;
            margin-bottom: 30px;
            padding: 6px 6px 6px 6px;
            display: block
        }

        .otherMessage {
            background: #ffcda3;
            border: solid 1px gray;
            margin: 0px 5px 5px 0px;
            float: right;
            padding: 0px 6px 0px 6px;
            border-radius: 10px 10px 0 10px;
        }

        .myMessage {
            background: #1bffbb;
            border: solid 1px gray;
            margin: 0px 5px 5px 5px;
            float: left;
            padding: 0px 6px 0px 6px;
            border-radius: 10px 10px 10px 0;
        }

        .screenName {
            padding: 6px 6px 6px 6px;
            border-radius: 10px 10px 10px 10px;
            font-weight: bold;
            background: #1bffbb;
        }

        .circle {
            padding: 6px;
            background: gray;
            border-radius: 50px;
        }

        .jumbotron {
            margin-top: -40px;
            height: 180px;
        }

        .footer {
            margin-top: 10px;
        }
    </style>
</head>

<body>

    <div class="jumbotron text-center" style="margin-bottom:0">
        <h1>Lucky Numbers Mini-Games</h1>
        <p><a href="https://sbcode.net/tssock" target="_blank">https://sbcode.net/tssock</a>
        </p>
    </div>

    <nav class="navbar navbar-expand-sm bg-dark navbar-dark">
        <a class="navbar-brand" href="#">Games</a>
        <button class="navbar-toggler" type="button" data-toggle="collapse" data-target="#collapsibleNavbar">
            <span class="navbar-toggler-icon"></span>
        </button>
        <div class="collapse navbar-collapse" id="collapsibleNavbar">
            <ul class="navbar-nav">
                <li class="nav-item">
                    <a class="nav-link" href="#" onclick="client.showGame(0)">🥉Bronze Game</a>
                </li>
                <li class="nav-item">
                    <a class="nav-link" href="#" onclick="client.showGame(1)">🥈Silver Game</a>
                </li>
                <li class="nav-item">
                    <a class="nav-link" href="#" onclick="client.showGame(2)">🥇Gold Game</a>
                </li>
            </ul>
        </div>
    </nav>

    <div class="container" style="margin-top:30px">
        <div class="row">
            <div class="col-sm-8">
                <div class="gamePanel" id="gamePanel0">
                    <h2 id="gameTitle">🥉Bronze Game</h2>
                    <div class="p-2">Your Screen Name is <span class="screenName"></span></div>
                </div>
                <div class="gamePanel" id="gamePanel1">
                    <h2 id="gameTitle">🥈Silver Game</h2>
                    <div class="p-2">Your Screen Name is <span class="screenName"></span></div>
                </div>
                <div class="gamePanel" id="gamePanel2">
                    <h2 id="gameTitle">🥇Gold Game</h2>
                    <div class="p-2">Your Screen Name is <span class="screenName"></span></div>
                </div>
            </div>
            <div class="col-sm-4">
                <div class="chatPanel">
                    <ol id="messages" class="messages">
                    </ol>
                    <div class="chatMessageInputDiv">
                        <div class="input-group">
                            <input class="form-control width100" id="messageText" placeholder="Enter Chat Message"
                                onkeyup="">
                            <span class="input-group-btn">
                                <button class="btn btn-info" onclick="client.sendMessage()">Send</button>
                            </span>
                        </div>
                    </div>
                </div>
            </div>
        </div>
    </div>

    <div class="footer text-center" style="margin-bottom:0">
        This is an example game from the TypeScript SocketIO course at <a href="https://sbcode.net/tssock"
            target="_blank">https://sbcode.net/tssock</a>
    </div>

    <script src="jquery/jquery.min.js"></script>
    <script src="bootstrap/js/bootstrap.bundle.min.js"></script>
    <script src="socket.io/socket.io.js"></script>
    <script src="client.js"></script>

</body>

</html>