date-fns/locale/_lib/buildMatchFn.cjs

Modern JavaScript date utility library

"use strict";
exports.buildMatchFn = buildMatchFn;

function buildMatchFn(args) {
  return (string, options = {}) => {
    const width = options.width;

    const matchPattern =
      (width && args.matchPatterns[width]) ||
      args.matchPatterns[args.defaultMatchWidth];
    const matchResult = string.match(matchPattern);

    if (!matchResult) {
      return null;
    }
    const matchedString = matchResult[0];

    const parsePatterns =
      (width && args.parsePatterns[width]) ||
      args.parsePatterns[args.defaultParseWidth];

    const key = Array.isArray(parsePatterns)
      ? findIndex(parsePatterns, (pattern) => pattern.test(matchedString))
      : // [TODO] -- I challenge you to fix the type
        findKey(parsePatterns, (pattern) => pattern.test(matchedString));

    let value;

    value = args.valueCallback ? args.valueCallback(key) : key;
    value = options.valueCallback
      ? // [TODO] -- I challenge you to fix the type
        options.valueCallback(value)
      : value;

    const rest = string.slice(matchedString.length);

    return { value, rest };
  };
}

function findKey(object, predicate) {
  for (const key in object) {
    if (
      Object.prototype.hasOwnProperty.call(object, key) &&
      predicate(object[key])
    ) {
      return key;
    }
  }
  return undefined;
}

function findIndex(array, predicate) {
  for (let key = 0; key < array.length; key++) {
    if (predicate(array[key])) {
      return key;
    }
  }
  return undefined;
}