Parse complex string redux-form

parse-redux-form-field.js

const escapeRegex = /([^\\])\./g;

export const normalizeToken = index => (str, prev) => {
  if (
    typeof str === 'string' ||
    typeof str === 'number' ||
    typeof str === 'boolean') {
    const groups = prev.toString()
      .replace(escapeRegex, '$1¬')
      .split('¬');
    const escapedString = str
      .toString()
      .replace(/^\./, '\\.')
      .replace(escapeRegex, '$1\\.');
    groups[index] = escapedString;
    return groups.join('.');
  }
  return str || prev;
};

export const getToken = index => (str) => {
  if (
    typeof str === 'string' ||
    typeof str === 'number' ||
    typeof str === 'boolean') {
    const match = str.toString()
      .replace(escapeRegex, '$1¬')
      .split('¬');
    return match[index] || '';
  }
  return str;
};