Sha256: 4823f955eae64d79e171785cece8ab3c1b8e0ea4133f4d7c2baa3bcd096ede76
Contents?: true
Size: 1.32 KB
Versions: 255
Compression:
Stored size: 1.32 KB
Contents
'use strict';
module.exports = function(input) {
this.input = input;
this.normalizePlaintext = function() {
return input.toLowerCase().replace(/[^a-zA-Z0-9]/g,'');
};
this.size = function() {
var realLength = Math.sqrt(this.normalizePlaintext().length);
return Math.ceil(realLength);
};
this.plaintextSegments = function() {
var plainText = this.normalizePlaintext();
var chunkSize = this.size();
var splitRegex = new RegExp('.{1,' + chunkSize + '}','g');
return plainText.match(splitRegex);
};
this.ciphertext = function() {
var textSegments = this.plaintextSegments();
var i, j;
var columns = [];
var currentSegment;
var currentLetter;
for (i = 0; i < this.size(); i++) {
columns.push([]);
}
for (i = 0; i < textSegments.length; i++) {
currentSegment = textSegments[i];
for (j = 0; j < currentSegment.length; j++) {
currentLetter = currentSegment[j];
columns[j].push(currentLetter);
}
}
for (i = 0; i < columns.length; i++) {
columns[i] = columns[i].join('');
}
return columns.join('');
};
this.normalizeCiphertext = function() {
var chunkSize = this.size();
var splitRegex = new RegExp('.{1,' + chunkSize + '}','g');
return this.ciphertext().match(splitRegex).join(' ');
};
};
Version data entries
255 entries across 255 versions & 1 rubygems