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import { millisecondsInHour, millisecondsInMinute, millisecondsInSecond } from "../../constants/index.js";
import { numericPatterns } from "./constants.js";
export function mapValue(parseFnResult, mapFn) {
  if (!parseFnResult) {
    return parseFnResult;
  }
  return {
    value: mapFn(parseFnResult.value),
    rest: parseFnResult.rest
  };
}
export function parseNumericPattern(pattern, dateString) {
  var matchResult = dateString.match(pattern);
  if (!matchResult) {
    return null;
  }
  return {
    value: parseInt(matchResult[0], 10),
    rest: dateString.slice(matchResult[0].length)
  };
}
export function parseTimezonePattern(pattern, dateString) {
  var matchResult = dateString.match(pattern);
  if (!matchResult) {
    return null;
  }

  // Input is 'Z'
  if (matchResult[0] === 'Z') {
    return {
      value: 0,
      rest: dateString.slice(1)
    };
  }
  var sign = matchResult[1] === '+' ? 1 : -1;
  var hours = matchResult[2] ? parseInt(matchResult[2], 10) : 0;
  var minutes = matchResult[3] ? parseInt(matchResult[3], 10) : 0;
  var seconds = matchResult[5] ? parseInt(matchResult[5], 10) : 0;
  return {
    value: sign * (hours * millisecondsInHour + minutes * millisecondsInMinute + seconds * millisecondsInSecond),
    rest: dateString.slice(matchResult[0].length)
  };
}
export function parseAnyDigitsSigned(dateString) {
  return parseNumericPattern(numericPatterns.anyDigitsSigned, dateString);
}
export function parseNDigits(n, dateString) {
  switch (n) {
    case 1:
      return parseNumericPattern(numericPatterns.singleDigit, dateString);
    case 2:
      return parseNumericPattern(numericPatterns.twoDigits, dateString);
    case 3:
      return parseNumericPattern(numericPatterns.threeDigits, dateString);
    case 4:
      return parseNumericPattern(numericPatterns.fourDigits, dateString);
    default:
      return parseNumericPattern(new RegExp('^\\d{1,' + n + '}'), dateString);
  }
}
export function parseNDigitsSigned(n, dateString) {
  switch (n) {
    case 1:
      return parseNumericPattern(numericPatterns.singleDigitSigned, dateString);
    case 2:
      return parseNumericPattern(numericPatterns.twoDigitsSigned, dateString);
    case 3:
      return parseNumericPattern(numericPatterns.threeDigitsSigned, dateString);
    case 4:
      return parseNumericPattern(numericPatterns.fourDigitsSigned, dateString);
    default:
      return parseNumericPattern(new RegExp('^-?\\d{1,' + n + '}'), dateString);
  }
}
export function dayPeriodEnumToHours(dayPeriod) {
  switch (dayPeriod) {
    case 'morning':
      return 4;
    case 'evening':
      return 17;
    case 'pm':
    case 'noon':
    case 'afternoon':
      return 12;
    case 'am':
    case 'midnight':
    case 'night':
    default:
      return 0;
  }
}
export function normalizeTwoDigitYear(twoDigitYear, currentYear) {
  var isCommonEra = currentYear > 0;
  // Absolute number of the current year:
  // 1 -> 1 AC
  // 0 -> 1 BC
  // -1 -> 2 BC
  var absCurrentYear = isCommonEra ? currentYear : 1 - currentYear;
  var result;
  if (absCurrentYear <= 50) {
    result = twoDigitYear || 100;
  } else {
    var rangeEnd = absCurrentYear + 50;
    var rangeEndCentury = Math.floor(rangeEnd / 100) * 100;
    var isPreviousCentury = twoDigitYear >= rangeEnd % 100;
    result = twoDigitYear + rangeEndCentury - (isPreviousCentury ? 100 : 0);
  }
  return isCommonEra ? result : 1 - result;
}
export function isLeapYearIndex(year) {
  return year % 400 === 0 || year % 4 === 0 && year % 100 !== 0;
}