/**
 * function to convert array to string and string to array
 * @param {*} input
 * @param {String} separator
 * @returns {*}
 */
function convertArrayAndString(input, separator = ', ') {
  // If the separator is just a comma without a space, change it to ", "
  if (separator === ',') {
    separator = ', '
  }

  if (Array.isArray(input)) {
    // Convert array to string with the correct separator
    return input.join(separator)
  } else if (typeof input === 'string') {
    // Convert string to array using the separator
    return input.split(separator)
  } else {
    throw new Error('Input must be either an array or a string.')
  }
}

module.exports = {
  convertArrayAndString
}