Contents

export default class Square {
  constructor(input) {
    this.input = input;
  }

  normalizePlaintext() {
    return this.input.toLowerCase().replace(/[^a-zA-Z0-9]/g, '');
  }

  size() {
    const realLength = Math.sqrt(this.normalizePlaintext().length);
    return Math.ceil(realLength);
  }

  plaintextSegments() {
    const plainText = this.normalizePlaintext();
    const chunkSize = this.size();

    const splitRegex = new RegExp(`.{1,${chunkSize}}`, 'g');
    return plainText.match(splitRegex);
  }

  ciphertext() {
    const textSegments = this.plaintextSegments(),
      columns = [];
    let i,
      j,
      currentSegment,
      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('');
  }

  normalizeCiphertext() {
    const chunkSize = this.size();
    const splitRegex = new RegExp(`.{1,${chunkSize}}`, 'g');
    return this.ciphertext().match(splitRegex).join(' ');
  }
}

Version data entries

185 entries across 185 versions & 1 rubygems

Version	Path
trackler-2.2.1.159	tracks/ecmascript/exercises/crypto-square/example.js
trackler-2.2.1.158	tracks/ecmascript/exercises/crypto-square/example.js
trackler-2.2.1.157	tracks/ecmascript/exercises/crypto-square/example.js
trackler-2.2.1.156	tracks/ecmascript/exercises/crypto-square/example.js
trackler-2.2.1.155	tracks/ecmascript/exercises/crypto-square/example.js
trackler-2.2.1.154	tracks/ecmascript/exercises/crypto-square/example.js
trackler-2.2.1.153	tracks/ecmascript/exercises/crypto-square/example.js
trackler-2.2.1.152	tracks/ecmascript/exercises/crypto-square/example.js
trackler-2.2.1.151	tracks/ecmascript/exercises/crypto-square/example.js
trackler-2.2.1.150	tracks/ecmascript/exercises/crypto-square/example.js
trackler-2.2.1.149	tracks/ecmascript/exercises/crypto-square/example.js
trackler-2.2.1.148	tracks/ecmascript/exercises/crypto-square/example.js
trackler-2.2.1.147	tracks/ecmascript/exercises/crypto-square/example.js
trackler-2.2.1.146	tracks/ecmascript/exercises/crypto-square/example.js
trackler-2.2.1.145	tracks/ecmascript/exercises/crypto-square/example.js
trackler-2.2.1.144	tracks/ecmascript/exercises/crypto-square/example.js
trackler-2.2.1.143	tracks/ecmascript/exercises/crypto-square/example.js
trackler-2.2.1.142	tracks/ecmascript/exercises/crypto-square/example.js
trackler-2.2.1.141	tracks/ecmascript/exercises/crypto-square/example.js
trackler-2.2.1.140	tracks/ecmascript/exercises/crypto-square/example.js