Javascript/STATE_MANAGEMENT.html at main · coderATP/Javascript · GitHub

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<!DOCTYPE html>
<html>

<head>
    <style>
        *{
    padding: 0;
    margin: 0;
    user-select: none;
    box-sizing: border-box;
}

#canvas{
    border: 2px solid black;
    max-width: 100%;
    max-height: 100%;
}

div#buttons{
    position: absolute;
    bottom: 60%;
    width: 50%;
    border: 2px solid black;
    display: flex;
    align-items: center;
    justify-content: center;
}
#charge, #swarm, #idle{
    font-size: 2rem;
    width: 33.33%;
}
button:hover, button:focus{
    color: white;
    background-color: black;
}
    </style>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1">
    <title>State Management Advanced</title>
    <link rel="stylesheet" href="style.css">
</head>

<body>
    <p id = 'info'>Idle</p>

    <div id='buttons'>
       <button id= 'idle'>I</button>
       <button id= 'charge'>C</button>
       <button id= 'swarm'>S</button>
    </div>

<script>
//akaka(ajjsjsjwwjj#hhwh^bwbbsbsbbsbsbbsbb#bbsbssnbsbssbsbsbsbbsbsbbsbsbsbbsbsbsbbsbsbbssbbsbsznbshsbsbbsbsb)
class Game{
    constructor(canvas){
        this.canvas = canvas;
        this.width = this.canvas.width;
        this.height = this.canvas.height;
        this.states = {
            idle: new Idle(this),
            charge: new Charge(this),
            swarm: new Swarm(this)
        }
        this.alien = this.states['idle'];
        this.alien.start();

        //keys
        this.keys = new Set();
        this.keypressed = false;
        const btns = document.querySelectorAll('button');
        btns.forEach(btn=>{
            btn.addEventListener('touchstart', (e)=>{
                this.keypressed = true;
                this.keys.add(e.target.id);
            })
            btn.addEventListener('touchend', (e)=>{
                this.keypressed = false;
                this.keys.clear();
            })

        })

        //text
        this.info = document.getElementById('info');
    }

    setAlienState(state){
        this.alien = this.states[state];
        this.alien.start();
    }

    render(ctx){
        this.alien.draw(ctx);
    }
    update(ctx, deltaTime){
        this.alien.update(ctx, deltaTime)
    }
}

class Alien{
    constructor(game){
        this.game = game;
        this.width = 200;
        this.height = 80;
        this.x = this.game.width * 0.5 - this.width * 0.5;
        this.y = this.game.height * 0.5 - this.height * 0.5;
        this.color = 'black';

        this.counter = 10000;
    }

    draw(ctx){
        ctx.fillStyle = this.color;
        ctx.fillRect(this.x, this.y, this.width, this.height);
    }
}

class Idle extends Alien{
    start(){
        this.color = 'red';
        this.counter = 10000;
    }
    update(ctx, deltaTime){
        this.game.info.innerText = 'IDLE! Press C to charge or S to swarm';
        if(this.game.keys.has('charge') && this.game.keypressed){
            this.game.info.innerText = 'Charging'
            this.game.setAlienState('charge');
            this.game.keypressed = false;
        }
        else if(this.game.keys.has('swarm') && this.game.keypressed){
            this.game.info.innerText = 'Swarming! Press I \n or wait for '+this.counter/1000 +
            ' seconds to automatically switch back to Idle';

            this.game.setAlienState('swarm');
            this.game.keypressed = false;
        }
    }
}
class Charge extends Alien{
    start(){
        this.color = 'green';
        this.game.info.innerText = 'CHARGING! Press S to swarm';
    }
    update(ctx, deltaTime){
        if(this.game.keys.has('swarm') && this.game.keypressed){
            this.game.setAlienState('swarm');
            this.game.keypressed = false;
        }
        else if(this.game.keys.has('idle')){
            this.game.info.innerText = 'You cannot switch to Idle, press S to swarm';
        }
    }
}
class Swarm extends Alien{
    start(){
        this.color = 'blue';
        this.counter = 10000;
        this.game.info.innerText = 'Swarming! Press I \n or wait for '+this.counter/1000 +
            ' seconds to automatically switch back to Idle';
    }
    update(ctx, deltaTime){
        ctx.font = '30px Impact';
        ctx.fillText(Math.floor(this.counter/1000) , 10, 30)
        this.counter-= deltaTime;
        if(this.counter <= 0){
            this.game.setAlienState('idle');
            this.game.info.innerText = 'Idle';
        }
        else if(this.game.keys.has('idle')){
            this.game.setAlienState('idle');
            this.game.info.innerText = 'Idle';
        }
        else if(this.game.keys.has('charge')){
            this.game.info.innerText = 'You cannot switch to Charge, \n Press I to idle'
        }
    }
}


addEventListener('load', ()=>{
    canvas.width = 800;
    canvas.height = 360;
    const ctx = canvas.getContext('2d');

    const game = new Game(canvas);

    let timestart = 0, deltaTime = 0;
    function loop(timestamp ){
        deltaTime = timestamp - timestart;
        timestart = timestamp;

        ctx.clearRect(0,0, canvas.width, canvas.height);

        game.render(ctx);
        game.update(ctx, deltaTime);

        requestAnimationFrame(loop);
    }
    loop()


})
    </script>

    <canvas id = 'canvas'> </canvas>

</body>

</html>