KamaSutra Cipher

cipher-helpers.js

function KamaSutraCipher(key) {
  this.pairs = key;
  this.encode = function (str) {
    let encoded = '';
    for (let k in str) {
      loop:
      for (let i = 0, max = this.pairs.length; i < max; i++) {
        const indexInPair = this.pairs[i].indexOf(str[k]);
        if (indexInPair !== -1) {
          encoded += (indexInPair === 0) ? this.pairs[i][1] : this.pairs[i][0];
          break loop;
        }
        if (i === max - 1) { encoded += str[k]; } // if char is not present in pairs
      }
    }
    return encoded;
  };
  this.decode = function (str) {
    return this.encode(str);
  }
}

// TEST
const key = [
  ['d', 'p'],
  ['n', 'o'],
  ['a', 'w'],
  ['f', 'c'],
  ['h', 's'],
  ['l', 'v'],
  ['m', 'j'],
  ['x', 'b'],
  ['e', 'z'],
  ['r', 'i'],
  ['k', 'y'],
  ['u', 'q'],
  ['t', 'g']
];
let coder = new KamaSutraCipher(key);

c.encode('mutt'); // 'jqgg'
c.decode('jqgg'); // 'mutt'

c.encode('panda'); // 'dwopw'
c.decode('dwopw'); // 'panda'

c.encode('panCda'); // 'dwoCpw'
c.decode('dwoCpw'); // 'panCda'

KamaSutraCipher.markdown

KamaSutra Cipher

Function KamaSutraCipher encodes / decodes input string based on previously provided key pairs dictionary.

It replaces a character in string if it is present in key array and leaves it as is if it is not.

Example key pairs dictionary: [ ['d', 'p'], ['n', 'o'], ['a', 'w'], ['f', 'c'], ['h', 's'], ['l', 'v'], ['m', 'j'], ['x', 'b'], ['e', 'z'], ['r', 'i'], ['k', 'y'], ['u', 'q'], ['t', 'g'] ]

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License.