Method performEncode

src/Encoder/TapCode.js:83–110

* Performs encode on given content. * @protected * @param {Chain} content * @return {number[]|string|Uint8Array|Chain} Encoded content

(content)

   * @return {number[]|string|Uint8Array|Chain} Encoded content
   */
  async performEncode (content) {
    const tapMark = this.getSettingValue('tapMark').getString()
    const groupMark = this.getSettingValue('groupMark').getString()
    const letterMark = this.getSettingValue('letterMark').getString()

    // Encode content to coordinates using Polybius square
    // As C and K shares the same alphabet position, replace all K chars
    const coordinates = await this._polybiusSquare.encode(
      content.getString().replace(/k/gi, 'c'))

    const count = coordinates.getLength() / 2
    let row, column
    let result = ''

    // Translate each set of coordinates into tap marks
    for (let i = 0; i < count; i++) {
      row = parseInt(coordinates.getCharAt(i * 2))
      column = parseInt(coordinates.getCharAt(i * 2 + 1))

      result +=
        (i > 0 ? letterMark : '') +
        tapMark.repeat(row) +
        groupMark +
        tapMark.repeat(column)
    }

    return result
  }

  /**
   * Performs decode on given content.