import { Parser } from "../Parser.mjs"; import { mapValue, normalizeTwoDigitYear, parseNDigits } from "../utils.mjs"; // From http://www.unicode.org/reports/tr35/tr35-31/tr35-dates.html#Date_Format_Patterns // | Year | y | yy | yyy | yyyy | yyyyy | // |----------|-------|----|-------|-------|-------| // | AD 1 | 1 | 01 | 001 | 0001 | 00001 | // | AD 12 | 12 | 12 | 012 | 0012 | 00012 | // | AD 123 | 123 | 23 | 123 | 0123 | 00123 | // | AD 1234 | 1234 | 34 | 1234 | 1234 | 01234 | // | AD 12345 | 12345 | 45 | 12345 | 12345 | 12345 | export class YearParser extends Parser { priority = 130; incompatibleTokens = ["Y", "R", "u", "w", "I", "i", "e", "c", "t", "T"]; parse(dateString, token, match) { const valueCallback = (year) => ({ year, isTwoDigitYear: token === "yy", }); switch (token) { case "y": return mapValue(parseNDigits(4, dateString), valueCallback); case "yo": return mapValue( match.ordinalNumber(dateString, { unit: "year", }), valueCallback, ); default: return mapValue(parseNDigits(token.length, dateString), valueCallback); } } validate(_date, value) { return value.isTwoDigitYear || value.year > 0; } set(date, flags, value) { const currentYear = date.getFullYear(); if (value.isTwoDigitYear) { const normalizedTwoDigitYear = normalizeTwoDigitYear( value.year, currentYear, ); date.setFullYear(normalizedTwoDigitYear, 0, 1); date.setHours(0, 0, 0, 0); return date; } const year = !("era" in flags) || flags.era === 1 ? value.year : 1 - value.year; date.setFullYear(year, 0, 1); date.setHours(0, 0, 0, 0); return date; } }