Method performTranslate

src/Encoder/NumeralSystem.js:90–117

* Performs encode or decode on given content. * @protected * @param {Chain} content * @param {boolean} isEncode True for encoding, false for decoding * @return {number[]|string|Uint8Array|Chain|Promise} Resulting content

(content, isEncode)

   * @return {number[]|string|Uint8Array|Chain|Promise} Resulting content
   */
  performTranslate (content, isEncode) {
    const string = content.toString()
    const from = this.getSettingValue(isEncode ? 'from' : 'to')
    const to = this.getSettingValue(isEncode ? 'to' : 'from')

    const pattern = systemPatterns[systemNames.indexOf(from)]

    // Find numbers using pattern
    const result = string.replace(pattern, (match, rawNumber, offset) => {
      const alone =
        (offset === 0 || StringUtil.isWhitespace(string, offset - 1)) &&
        (string.length === offset + rawNumber.length ||
          StringUtil.isWhitespace(string, offset + rawNumber.length))

      if (!alone) {
        // Ignore numbers having adjacent characters
        return rawNumber
      }

      const decimal = NumeralSystemEncoder.decodeNumber(from, rawNumber)
      const encodedValue = decimal !== null
        ? NumeralSystemEncoder.encodeNumber(to, decimal)
        : null
      return encodedValue || rawNumber
    })

    return result
  }

  /**
   * Translates number from given system to decimal.