Javrscirpt drusnk tetx transloaetr

drunk-text.js

function drunk(text) {

    function modifyWord(word, i, a) {
        var wordArray = word.split('');
        var isPunct = punct.test(word);

        if (!isPunct) {
            if (chance(50)) {
                var letter = letters[Math.floor(letters.length * rand())];
                var position = Math.floor(wordArray.length * rand());
                wordArray.splice(position, +chance(10), letter);
            }
            if (wordArray.length > 2 && chance(55 + wordArray.length * 2)) {
                var start = Math.floor((wordArray.length - 4) * rand()) + 2;
                var length = Math.floor(4 * rand()) + 2;
                var end = start + length
                end = end > wordArray.length ? wordArray.length : end;
                var wordPart = wordArray.slice(start, end);
                wordPart = wordPart.sort(function () {
                    return 0.5 - rand()
                });
                var upperIndex = Math.floor(wordPart.length * rand());
                if (chance(20)) {
                    wordPart[upperIndex] = wordPart[upperIndex].toUpperCase();
                }
                wordArray.splice(start, end - start, wordPart.join(''));
            }
        }

        if (!isPunct) {
            wordArray.push(chance(70) ? ' ' : (chance(50) ? '  ' : ','));
        } else if (isPunct || punct.test(a[i + 1])) {
            wordArray.push(chance(50) ? ' ' : '-');
        }
        words[i] = wordArray.join('');
    }

    function chance(number) {
        window.crypto.getRandomValues(rArray);
        return (rArray[0] / 255 * 100) < number;
    }

    function rand() {
        window.crypto.getRandomValues(rArray);
        return (rArray / 256);
    }

    var words = [];
    var rArray = new Uint8Array(1);
    var punct = /^[!@#$%^&*()_+=|\\\/?.,<>:;"'-]+$/;
    var letters = text.toLowerCase()
        .replace(/[\s]/g, '').split('')
        .filter(function (l, x, a) {
            return a.indexOf(l) === x && !punct.test(l);
        });
    text.split(/\s+/)
        .forEach(modifyWord);

    return words.join('');
}

console.log(drunk('Javascript drunk text translator'));