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