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-2.2.1.98	tracks/ecmascript/exercises/crypto-square/example.js
trackler-2.2.1.97	tracks/ecmascript/exercises/crypto-square/example.js
trackler-2.2.1.96	tracks/ecmascript/exercises/crypto-square/example.js
trackler-2.2.1.95	tracks/ecmascript/exercises/crypto-square/example.js
trackler-2.2.1.94	tracks/ecmascript/exercises/crypto-square/example.js
trackler-2.2.1.93	tracks/ecmascript/exercises/crypto-square/example.js
trackler-2.2.1.92	tracks/ecmascript/exercises/crypto-square/example.js
trackler-2.2.1.91	tracks/ecmascript/exercises/crypto-square/example.js
trackler-2.2.1.90	tracks/ecmascript/exercises/crypto-square/example.js
trackler-2.2.1.89	tracks/ecmascript/exercises/crypto-square/example.js
trackler-2.2.1.88	tracks/ecmascript/exercises/crypto-square/example.js
trackler-2.2.1.87	tracks/ecmascript/exercises/crypto-square/example.js
trackler-2.2.1.86	tracks/ecmascript/exercises/crypto-square/example.js
trackler-2.2.1.85	tracks/ecmascript/exercises/crypto-square/example.js
trackler-2.2.1.84	tracks/ecmascript/exercises/crypto-square/example.js
trackler-2.2.1.83	tracks/ecmascript/exercises/crypto-square/example.js
trackler-2.2.1.82	tracks/ecmascript/exercises/crypto-square/example.js
trackler-2.2.1.81	tracks/ecmascript/exercises/crypto-square/example.js
trackler-2.2.1.80	tracks/ecmascript/exercises/crypto-square/example.js
trackler-2.2.1.79	tracks/ecmascript/exercises/crypto-square/example.js