lodashObjectPathParser.js

const charCodeOfDot = ".".charCodeAt(0);
const reEscapeChar = /\\(\\)?/g;
const rePropName = RegExp(
  // Match anything that isn't a dot or bracket.
  "[^.[\\]]+" +
    "|" +
    // Or match property names within brackets.
    "\\[(?:" +
    // Match a non-string expression.
    "([^\"'][^[]*)" +
    "|" +
    // Or match strings (supports escaping characters).
    "([\"'])((?:(?!\\2)[^\\\\]|\\\\.)*?)\\2" +
    ")\\]" +
    "|" +
    // Or match "" as the space between consecutive dots or empty brackets.
    "(?=(?:\\.|\\[\\])(?:\\.|\\[\\]|$))",
  "g"
);

/**
 * Converts `string` to a property path array.
 *
 * @private
 * @param {string} string The string to convert.
 * @returns {Array} Returns the property path array.
 */
const stringToPath = string => {
  const result = [];
  if (string.charCodeAt(0) === charCodeOfDot) {
    result.push("");
  }
  string.replace(rePropName, (match, expression, quote, subString) => {
    let key = match;
    if (quote) {
      key = subString.replace(reEscapeChar, "$1");
    } else if (expression) {
      key = expression.trim();
    }
    result.push(key);
  });
  return result;
};

module.exports = stringToPath;