Acme.BookStore.HttpApi.Host/node_modules/luxon/src/impl/tokenParser.js

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import { parseMillis, isUndefined, untruncateYear, signedOffset, hasOwnProperty } from "./util.js";
import Formatter from "./formatter.js";
import FixedOffsetZone from "../zones/fixedOffsetZone.js";
import IANAZone from "../zones/IANAZone.js";
import DateTime from "../datetime.js";
import { digitRegex, parseDigits } from "./digits.js";
import { ConflictingSpecificationError } from "../errors.js";

const MISSING_FTP = "missing Intl.DateTimeFormat.formatToParts support";

function intUnit(regex, post = i => i) {
  return { regex, deser: ([s]) => post(parseDigits(s)) };
}

function fixListRegex(s) {
  // make dots optional and also make them literal
  return s.replace(/\./, "\\.?");
}

function stripInsensitivities(s) {
  return s.replace(/\./, "").toLowerCase();
}

function oneOf(strings, startIndex) {
  if (strings === null) {
    return null;
  } else {
    return {
      regex: RegExp(strings.map(fixListRegex).join("|")),
      deser: ([s]) =>
        strings.findIndex(i => stripInsensitivities(s) === stripInsensitivities(i)) + startIndex
    };
  }
}

function offset(regex, groups) {
  return { regex, deser: ([, h, m]) => signedOffset(h, m), groups };
}

function simple(regex) {
  return { regex, deser: ([s]) => s };
}

function escapeToken(value) {
  // eslint-disable-next-line no-useless-escape
  return value.replace(/[\-\[\]{}()*+?.,\\\^$|#\s]/g, "\\$&");
}

function unitForToken(token, loc) {
  const one = digitRegex(loc),
    two = digitRegex(loc, "{2}"),
    three = digitRegex(loc, "{3}"),
    four = digitRegex(loc, "{4}"),
    six = digitRegex(loc, "{6}"),
    oneOrTwo = digitRegex(loc, "{1,2}"),
    oneToThree = digitRegex(loc, "{1,3}"),
    oneToSix = digitRegex(loc, "{1,6}"),
    oneToNine = digitRegex(loc, "{1,9}"),
    twoToFour = digitRegex(loc, "{2,4}"),
    fourToSix = digitRegex(loc, "{4,6}"),