chrono-node
Version:
A natural language date parser in Javascript
281 lines • 6.8 kB
JavaScript
"use strict";
var __importDefault = (this && this.__importDefault) || function (mod) {
return (mod && mod.__esModule) ? mod : { "default": mod };
};
Object.defineProperty(exports, "__esModule", { value: true });
exports.toTimezoneOffset = exports.getLastWeekdayOfMonth = exports.getNthWeekdayOfMonth = exports.TIMEZONE_ABBR_MAP = void 0;
const dayjs_1 = __importDefault(require("dayjs"));
const types_1 = require("./types");
exports.TIMEZONE_ABBR_MAP = {
ACDT: 630,
ACST: 570,
ADT: -180,
AEDT: 660,
AEST: 600,
AFT: 270,
AKDT: -480,
AKST: -540,
ALMT: 360,
AMST: -180,
AMT: -240,
ANAST: 720,
ANAT: 720,
AQTT: 300,
ART: -180,
AST: -240,
AWDT: 540,
AWST: 480,
AZOST: 0,
AZOT: -60,
AZST: 300,
AZT: 240,
BNT: 480,
BOT: -240,
BRST: -120,
BRT: -180,
BST: 60,
BTT: 360,
CAST: 480,
CAT: 120,
CCT: 390,
CDT: -300,
CEST: 120,
CET: {
timezoneOffsetDuringDst: 2 * 60,
timezoneOffsetNonDst: 60,
dstStart: (year) => getLastWeekdayOfMonth(year, types_1.Month.MARCH, types_1.Weekday.SUNDAY, 2),
dstEnd: (year) => getLastWeekdayOfMonth(year, types_1.Month.OCTOBER, types_1.Weekday.SUNDAY, 3),
},
CHADT: 825,
CHAST: 765,
CKT: -600,
CLST: -180,
CLT: -240,
COT: -300,
CST: -360,
CT: {
timezoneOffsetDuringDst: -5 * 60,
timezoneOffsetNonDst: -6 * 60,
dstStart: (year) => getNthWeekdayOfMonth(year, types_1.Month.MARCH, types_1.Weekday.SUNDAY, 2, 2),
dstEnd: (year) => getNthWeekdayOfMonth(year, types_1.Month.NOVEMBER, types_1.Weekday.SUNDAY, 1, 2),
},
CVT: -60,
CXT: 420,
ChST: 600,
DAVT: 420,
EASST: -300,
EAST: -360,
EAT: 180,
ECT: -300,
EDT: -240,
EEST: 180,
EET: 120,
EGST: 0,
EGT: -60,
EST: -300,
ET: {
timezoneOffsetDuringDst: -4 * 60,
timezoneOffsetNonDst: -5 * 60,
dstStart: (year) => getNthWeekdayOfMonth(year, types_1.Month.MARCH, types_1.Weekday.SUNDAY, 2, 2),
dstEnd: (year) => getNthWeekdayOfMonth(year, types_1.Month.NOVEMBER, types_1.Weekday.SUNDAY, 1, 2),
},
FJST: 780,
FJT: 720,
FKST: -180,
FKT: -240,
FNT: -120,
GALT: -360,
GAMT: -540,
GET: 240,
GFT: -180,
GILT: 720,
GMT: 0,
GST: 240,
GYT: -240,
HAA: -180,
HAC: -300,
HADT: -540,
HAE: -240,
HAP: -420,
HAR: -360,
HAST: -600,
HAT: -90,
HAY: -480,
HKT: 480,
HLV: -210,
HNA: -240,
HNC: -360,
HNE: -300,
HNP: -480,
HNR: -420,
HNT: -150,
HNY: -540,
HOVT: 420,
ICT: 420,
IDT: 180,
IOT: 360,
IRDT: 270,
IRKST: 540,
IRKT: 540,
IRST: 210,
IST: 330,
JST: 540,
KGT: 360,
KRAST: 480,
KRAT: 480,
KST: 540,
KUYT: 240,
LHDT: 660,
LHST: 630,
LINT: 840,
MAGST: 720,
MAGT: 720,
MART: -510,
MAWT: 300,
MDT: -360,
MESZ: 120,
MEZ: 60,
MHT: 720,
MMT: 390,
MSD: 240,
MSK: 180,
MST: -420,
MT: {
timezoneOffsetDuringDst: -6 * 60,
timezoneOffsetNonDst: -7 * 60,
dstStart: (year) => getNthWeekdayOfMonth(year, types_1.Month.MARCH, types_1.Weekday.SUNDAY, 2, 2),
dstEnd: (year) => getNthWeekdayOfMonth(year, types_1.Month.NOVEMBER, types_1.Weekday.SUNDAY, 1, 2),
},
MUT: 240,
MVT: 300,
MYT: 480,
NCT: 660,
NDT: -90,
NFT: 690,
NOVST: 420,
NOVT: 360,
NPT: 345,
NST: -150,
NUT: -660,
NZDT: 780,
NZST: 720,
OMSST: 420,
OMST: 420,
PDT: -420,
PET: -300,
PETST: 720,
PETT: 720,
PGT: 600,
PHOT: 780,
PHT: 480,
PKT: 300,
PMDT: -120,
PMST: -180,
PONT: 660,
PST: -480,
PT: {
timezoneOffsetDuringDst: -7 * 60,
timezoneOffsetNonDst: -8 * 60,
dstStart: (year) => getNthWeekdayOfMonth(year, types_1.Month.MARCH, types_1.Weekday.SUNDAY, 2, 2),
dstEnd: (year) => getNthWeekdayOfMonth(year, types_1.Month.NOVEMBER, types_1.Weekday.SUNDAY, 1, 2),
},
PWT: 540,
PYST: -180,
PYT: -240,
RET: 240,
SAMT: 240,
SAST: 120,
SBT: 660,
SCT: 240,
SGT: 480,
SRT: -180,
SST: -660,
TAHT: -600,
TFT: 300,
TJT: 300,
TKT: 780,
TLT: 540,
TMT: 300,
TVT: 720,
ULAT: 480,
UTC: 0,
UYST: -120,
UYT: -180,
UZT: 300,
VET: -210,
VLAST: 660,
VLAT: 660,
VUT: 660,
WAST: 120,
WAT: 60,
WEST: 60,
WESZ: 60,
WET: 0,
WEZ: 0,
WFT: 720,
WGST: -120,
WGT: -180,
WIB: 420,
WIT: 540,
WITA: 480,
WST: 780,
WT: 0,
YAKST: 600,
YAKT: 600,
YAPT: 600,
YEKST: 360,
YEKT: 360,
};
function getNthWeekdayOfMonth(year, month, weekday, n, hour = 0) {
let dayOfMonth = 0;
let i = 0;
while (i < n) {
dayOfMonth++;
const date = new Date(year, month - 1, dayOfMonth);
if (date.getDay() === weekday)
i++;
}
return new Date(year, month - 1, dayOfMonth, hour);
}
exports.getNthWeekdayOfMonth = getNthWeekdayOfMonth;
function getLastWeekdayOfMonth(year, month, weekday, hour = 0) {
const oneIndexedWeekday = weekday === 0 ? 7 : weekday;
const date = new Date(year, month - 1 + 1, 1, 12);
const firstWeekdayNextMonth = date.getDay() === 0 ? 7 : date.getDay();
let dayDiff;
if (firstWeekdayNextMonth === oneIndexedWeekday)
dayDiff = 7;
else if (firstWeekdayNextMonth < oneIndexedWeekday)
dayDiff = 7 + firstWeekdayNextMonth - oneIndexedWeekday;
else
dayDiff = firstWeekdayNextMonth - oneIndexedWeekday;
date.setDate(date.getDate() - dayDiff);
return new Date(year, month - 1, date.getDate(), hour);
}
exports.getLastWeekdayOfMonth = getLastWeekdayOfMonth;
function toTimezoneOffset(timezoneInput, date, timezoneOverrides = {}) {
var _a;
if (timezoneInput == null) {
return null;
}
if (typeof timezoneInput === "number") {
return timezoneInput;
}
const matchedTimezone = (_a = timezoneOverrides[timezoneInput]) !== null && _a !== void 0 ? _a : exports.TIMEZONE_ABBR_MAP[timezoneInput];
if (matchedTimezone == null) {
return null;
}
if (typeof matchedTimezone == "number") {
return matchedTimezone;
}
if (date == null) {
return null;
}
if (dayjs_1.default(date).isAfter(matchedTimezone.dstStart(date.getFullYear())) &&
!dayjs_1.default(date).isAfter(matchedTimezone.dstEnd(date.getFullYear()))) {
return matchedTimezone.timezoneOffsetDuringDst;
}
return matchedTimezone.timezoneOffsetNonDst;
}
exports.toTimezoneOffset = toTimezoneOffset;
//# sourceMappingURL=timezone.js.map