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index.html
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<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8"/>
<style>
body {
text-align:center;
position:relative;
}
#grid{
display:inline-block;
position:relative;
}
canvas {
z-index: -1;
}
input { opacity: 0;
position:absolute;
left:0;
top:0;
}
</style>
</head>
<body>
<audio id="Success">
<source src="success.mp3" type="audio/mpeg">
Your browser does not support the audio element.
</audio>
<div id="grid">
<canvas id="numbers" >
Your browser does not support the HTML5 canvas tag.
</canvas>
<input id ="inputTel" type="tel" pattern="[0-9]*" autofocus>
</div>
<div id="text">
Enter phone numbers using digits (0...9) <BR>
First digit different from 0 <BR>
backspace to delete digits <BR>
Enter to validate <BR>
<button id="New" type="button">New game</button>
</div>
<script>
"use strict";
const DIGITS = 8;
const SIZE = 60;
const HALF_SIZE = SIZE/2;
class Number
{
constructor (number)
{
this.sucess = document.getElementById("Success");
this.canvas = document.getElementById("numbers");
this.InputNumber = this.InitInputNumber();
this.NewGame(number);
}
NewGame(number)
{
this.number = number.toString();
this.result = [];
this.row= this.col=0;
this.numberFreq = this.ProcessNumber();
this.ctx = this.initBoard();
this.InputNumber.value="";
this.InputNumber.focus();
}
initBoard()
{
let ctx = this.canvas.getContext('2d');
ctx.canvas.height = ctx.canvas.width = DIGITS*SIZE;
ctx.textBaseline="middle";
ctx.textAlign="center";
ctx.font = "30px Arial";
for (var i = 0; i <= ctx.canvas.height; i+=SIZE)
{
ctx.moveTo(i,0);
ctx.lineTo(i,ctx.canvas.height);
ctx.moveTo(0,i);
ctx.lineTo(ctx.canvas.width,i);
}
ctx.stroke();
return ctx;
}
ProcessNumber()
{
let numberFreq = [];
for( let i = 0; i < DIGITS;i++)
{
let elem = this.number[i];
if (elem in numberFreq )
{
numberFreq[elem]++;
}
else
{
numberFreq[elem]=1;
}
}
return numberFreq;
}
InitInputNumber()
{
let _self = this;
let InputNumber = document.getElementById("inputTel");
InputNumber.addEventListener('keyup',function(event) {
if(('Enter'==event.key ) && (DIGITS ==this.value.length ))
{
_self.checkInput();
}
});
InputNumber.addEventListener('keydown',function(event) {
if(((!this.value.length ) && ('0' == event.key)) ||
((DIGITS == this.value.length) && ('Backspace' != event.key)))
{
event.preventDefault();
}
});
InputNumber.addEventListener('input',function() {
_self.processInput(this);
});
InputNumber.focus();
InputNumber.style.width= InputNumber.style.height=
this.canvas.width +"px";
return InputNumber;
}
checkInput(input)
{
/*this.InputNumber.disabled = true;*/
this.InputNumber.blur();
/* copy numberFreq array */
let numberFreq = this.numberFreq.slice();
let positions = [...Array(DIGITS).keys()];
for ( let i = 0; i < DIGITS; i++)
{
let digit = this.InputNumber.value[i];
if (this.number[i] == digit)
{
this.drawCell(i, digit, 'green');
this.result[i]=digit;
numberFreq[digit] --;
delete positions[i];
}else if ((numberFreq[digit] === undefined) ||
(0 == numberFreq[digit]))
{
this.drawCell(i, digit, 'gray');
delete positions[i];
}
}
for ( let i in positions)
{
let digit = this.InputNumber.value[i];
if(numberFreq[digit] > 0)
{
this.drawCell(i, digit, 'gold');
numberFreq[digit]--;
}
else
{
this.drawCell(i, digit, 'gray');
}
}
this.displayResult();
}
displayResult()
{
;
if(DIGITS != Object.keys(this.result).length)
{
if(this.row < DIGITS-1)
{
this.row++;
for ( let key in this.result)
{
this.drawCell(key,this.result[key],'green')
}
this.col = 0;
this.InputNumber.value="";
this.InputNumber.focus() ;
}else
{
this.DisplayText(this.number, 'black');
}
}else
{
this.sucess.play();
this.DisplayText("You Win", 'red');
}
}
DisplayText(Text, Color)
{
this.ctx.fillStyle=Color;
this.ctx.fillText(Text, this.ctx.canvas.width/2,this.ctx.canvas.height/2);
}
processInput ()
{
let InputValue = this.InputNumber.value;
let InputLength = InputValue.length;
let currentPos = this.col;
if(InputLength > currentPos)
{ /*user enter character*/
let digit = InputValue[InputLength -1];
if ( digit >= "0" && digit <= "9")
{
console.log("row = ", this.row, "digit = ", digit);
this.drawCell(this.col, digit, 'blue');
this.col++;
} else
{
this.InputNumber.value = InputValue.slice(0,-1);
}
}
else if (InputLength < currentPos)
{ /* user deleted character*/
this.col--;
this.drawCell(this.col,null, 'blue');
}
}
drawCell(col, digit,color)
{
var x=col*SIZE, y=this.row*SIZE;
this.ctx.fillStyle=color;
this.ctx.fillRect(x ,y, SIZE, SIZE);
if( digit)
{
this.ctx.fillStyle='white';
this.ctx.fillText(digit, x+HALF_SIZE,y+HALF_SIZE);
}
}
}
var number = new Number(Math.floor(Math.random() * 90000000)+10000000);
document.getElementById("New").addEventListener('click',function(event) {
number.NewGame(Math.floor(Math.random() * 90000000)+10000000);
});
</script>
</body>
</html>