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refactoring with es6 #4

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refactoring with es6 #4

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144 changes: 69 additions & 75 deletions index.html
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Original file line number Diff line number Diff line change
Expand Up @@ -172,85 +172,79 @@ <h1>Wanna decode <span style=
</footer>
<script src="lib/jsfuck@0.5.0.js"></script>
<script type="text/javascript">
(() => {
const select = document.getElementById('versions');

const handleChange = (event) => {
const script = document.querySelector('script[src]');
const version = event.target.value;
const link = `lib/jsfuck@${version}.js`;

const jsFuckScript = document.createElement('script');
jsFuckScript.src = link;
script.remove();
document.body.appendChild(jsFuckScript);
};

select.addEventListener('change', handleChange);
})();

const patternCreator = (prefix, postfix) => {
const replacedPrefix = prefix.replace(/[\[\]\(\)\+\!]/g, '\\$&');
const replacedPostfix = postfix.replace(/[\[\]\(\)\+\!]/g, '\\$&');

return `${replacedPrefix}(.*)${replacedPostfix}`;
};

const isMatching = (string, pattern) => {
const result = string.match(new RegExp(pattern));
return result ? result[1] : null;
};

const setDecoded = (decodedCode) => {
const code = document.getElementById('code');
code.value = eval(decodedCode);
};

const decode = () => {
const code = document.getElementById('code');
const withEval = document.getElementById('withEval');

if (withEval.checked) {
const functionNames = ['flat', 'fill', 'filter'];
let prefix = '';
let postfix = '';
let result = null;

for (const functionName of functionNames) {
if (functionName !== 'filter') {
prefix = `[][${JSFuck.encode(functionName)}]` +
`[${JSFuck.encode('constructor')}]` +
`(${JSFuck.encode('return eval')})()(`;
postfix = ')';
result = isMatching(code.value, patternCreator(prefix, postfix));

if (result) {
setDecoded(result);
break;
}
}

(function(){
var select = document.getElementById('versions');
function handleChange(event) {
var script = document.querySelector('script[src]');

var version = event.target.value;
var link = 'lib/jsfuck@' + version + '.js';

var jsFuckScript = document.createElement('script');
jsFuckScript.src = link;
script.remove();
document.body.appendChild(jsFuckScript);
};

select.addEventListener('change', handleChange);
})();

function patternCreator(prefix, postfix) {
var replacedPrefix = prefix.replace(/[\[\]\(\)\+\!]/g, '\\$&');
var replacedPostfix = postfix.replace(/[\[\]\(\)\+\!]/g, '\\$&');

return replacedPrefix + '(.*)' + replacedPostfix;
}

function isMatching(string, pattern) {
var result = string.match(new RegExp(pattern));
if (result) return result[1];

return null;
}

function setDecoded(decodedCode) {
var code = document.getElementById('code');
code.value = eval(decodedCode);
}

function decode() {
var code = document.getElementById('code');
var withEval = document.getElementById('withEval');

if (withEval.checked) {
var functionNames = ['flat', 'fill', 'filter'];
var prefix = '';
var postfix = '';
var result = null;

for (let i = 0; i < functionNames.length; i++) {
var functionName = functionNames[i];

if (functionName !== 'filter') {
prefix = '[][' + JSFuck.encode(functionName) + ']' +
'[' + JSFuck.encode('constructor') + ']' +
'(' + JSFuck.encode('return eval') + ')()(';
postfix = ')';
result = isMatching(code.value, patternCreator(prefix, postfix));

if (result) {
setDecoded(result);

break;
}
}

prefix = '[][' + JSFuck.encode(functionName) + ']' +
'[' + JSFuck.encode('constructor') + '](';
postfix = ')()';
result = isMatching(code.value, patternCreator(prefix, postfix));

if (result) {
setDecoded(result);
prefix = `[][${JSFuck.encode(functionName)}]` +
`[${JSFuck.encode('constructor')}](`;
postfix = ')()';
result = isMatching(code.value, patternCreator(prefix, postfix));

break;
}
}
} else {
setDecoded(code.value);
if (result) {
setDecoded(result);
break;
}
}
} else {
setDecoded(code.value);
}
};

</script>
</body>
</html>