@tencentcloud/call-uikit-vue/src/Components/util/stringToPath.ts

An Open-source Voice & Video Calling UI Component Based on Tencent Cloud Service.

const MAX_MEMOIZE_SIZE = 500;

function memoize(func, resolver) {
  // eslint-disable-next-line eqeqeq
  if (typeof func !== 'function' || (resolver != null && typeof resolver !== 'function')) {
    throw new TypeError('Expected a function');
  }
  const memoized = function (...args) {
    const key = resolver ? resolver.apply(this, args) : args[0];
    const cache = memoized.cache;

    if (cache.has(key)) {
      return cache.get(key);
    }
    const result = func.apply(this, args);
    memoized.cache = cache.set(key, result) || cache;
    return result;
  };
  memoized.cache = new (memoize.Cache || Map)();
  return memoized;
}

memoize.Cache = Map;

function memoizeCapped(func) {
  const result = memoize(func, (key) => {
    const { cache } = result;
    if (cache.size === MAX_MEMOIZE_SIZE) {
      cache.clear();
    }
    return key;
  });

  return result;
}

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 = memoizeCapped((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;
});

export default stringToPath;