385 lines
No EOL
9.8 KiB
JavaScript
385 lines
No EOL
9.8 KiB
JavaScript
export const PARSE_REGEX = /^(\d{4})-(\d{1,2})(-(\d{1,2}))?([^\d]+(\d{1,2}))?(:(\d{1,2}))?(:(\d{1,2}))?$/;
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export const PARSE_TIME = /(\d\d?)(:(\d\d?)|)(:(\d\d?)|)/;
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export const DAYS_IN_MONTH = [0, 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31];
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export const DAYS_IN_MONTH_LEAP = [0, 31, 29, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31];
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export const DAYS_IN_MONTH_MIN = 28;
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export const DAYS_IN_MONTH_MAX = 31;
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export const MONTH_MAX = 12;
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export const MONTH_MIN = 1;
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export const DAY_MIN = 1;
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export const DAYS_IN_WEEK = 7;
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export const MINUTES_IN_HOUR = 60;
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export const HOURS_IN_DAY = 24;
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export const FIRST_HOUR = 0;
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export function getStartOfWeek(timestamp, weekdays, today) {
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const start = copyTimestamp(timestamp);
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findWeekday(start, weekdays[0], prevDay);
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updateFormatted(start);
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if (today) {
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updateRelative(start, today, start.hasTime);
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}
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return start;
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}
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export function getEndOfWeek(timestamp, weekdays, today) {
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const end = copyTimestamp(timestamp);
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findWeekday(end, weekdays[weekdays.length - 1]);
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updateFormatted(end);
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if (today) {
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updateRelative(end, today, end.hasTime);
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}
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return end;
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}
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export function getStartOfMonth(timestamp) {
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const start = copyTimestamp(timestamp);
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start.day = DAY_MIN;
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updateWeekday(start);
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updateFormatted(start);
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return start;
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}
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export function getEndOfMonth(timestamp) {
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const end = copyTimestamp(timestamp);
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end.day = daysInMonth(end.year, end.month);
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updateWeekday(end);
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updateFormatted(end);
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return end;
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}
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export function parseTime(input) {
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if (typeof input === 'number') {
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// when a number is given, it's minutes since 12:00am
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return input;
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} else if (typeof input === 'string') {
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// when a string is given, it's a hh:mm:ss format where seconds are optional
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const parts = PARSE_TIME.exec(input);
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if (!parts) {
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return false;
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}
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return parseInt(parts[1]) * 60 + parseInt(parts[3] || 0);
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} else if (typeof input === 'object') {
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// when an object is given, it must have hour and minute
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if (typeof input.hour !== 'number' || typeof input.minute !== 'number') {
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return false;
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}
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return input.hour * 60 + input.minute;
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} else {
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// unsupported type
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return false;
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}
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}
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export function validateTimestamp(input) {
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return !!PARSE_REGEX.exec(input);
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}
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export function parseTimestamp(input, now) {
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// YYYY-MM-DD hh:mm:ss
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const parts = PARSE_REGEX.exec(input);
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if (!parts) return null;
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const timestamp = {
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date: input,
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time: '',
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year: parseInt(parts[1]),
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month: parseInt(parts[2]),
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day: parseInt(parts[4]) || 1,
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hour: parseInt(parts[6]) || 0,
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minute: parseInt(parts[8]) || 0,
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weekday: 0,
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hasDay: !!parts[4],
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hasTime: !!(parts[6] && parts[8]),
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past: false,
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present: false,
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future: false
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};
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updateWeekday(timestamp);
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updateFormatted(timestamp);
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if (now) {
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updateRelative(timestamp, now, timestamp.hasTime);
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}
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return timestamp;
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}
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export function parseDate(date) {
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return updateFormatted({
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date: '',
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time: '',
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year: date.getFullYear(),
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month: date.getMonth() + 1,
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day: date.getDate(),
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weekday: date.getDay(),
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hour: date.getHours(),
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minute: date.getMinutes(),
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hasDay: true,
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hasTime: true,
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past: false,
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present: true,
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future: false
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});
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}
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export function getDayIdentifier(timestamp) {
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return timestamp.year * 10000 + timestamp.month * 100 + timestamp.day;
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}
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export function getTimeIdentifier(timestamp) {
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return timestamp.hour * 100 + timestamp.minute;
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}
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export function getTimestampIdentifier(timestamp) {
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return getDayIdentifier(timestamp) * 10000 + getTimeIdentifier(timestamp);
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}
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export function updateRelative(timestamp, now, time = false) {
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let a = getDayIdentifier(now);
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let b = getDayIdentifier(timestamp);
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let present = a === b;
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if (timestamp.hasTime && time && present) {
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a = getTimeIdentifier(now);
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b = getTimeIdentifier(timestamp);
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present = a === b;
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}
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timestamp.past = b < a;
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timestamp.present = present;
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timestamp.future = b > a;
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return timestamp;
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}
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export function updateMinutes(timestamp, minutes, now) {
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timestamp.hasTime = true;
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timestamp.hour = Math.floor(minutes / MINUTES_IN_HOUR);
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timestamp.minute = minutes % MINUTES_IN_HOUR;
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timestamp.time = getTime(timestamp);
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if (now) {
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updateRelative(timestamp, now, true);
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}
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return timestamp;
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}
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export function updateWeekday(timestamp) {
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timestamp.weekday = getWeekday(timestamp);
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return timestamp;
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}
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export function updateFormatted(timestamp) {
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timestamp.time = getTime(timestamp);
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timestamp.date = getDate(timestamp);
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return timestamp;
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}
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export function getWeekday(timestamp) {
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if (timestamp.hasDay) {
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const _ = Math.floor;
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const k = timestamp.day;
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const m = (timestamp.month + 9) % MONTH_MAX + 1;
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const C = _(timestamp.year / 100);
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const Y = timestamp.year % 100 - (timestamp.month <= 2 ? 1 : 0);
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return ((k + _(2.6 * m - 0.2) - 2 * C + Y + _(Y / 4) + _(C / 4)) % 7 + 7) % 7;
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}
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return timestamp.weekday;
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}
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export function isLeapYear(year) {
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return year % 4 === 0 && year % 100 !== 0 || year % 400 === 0;
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}
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export function daysInMonth(year, month) {
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return isLeapYear(year) ? DAYS_IN_MONTH_LEAP[month] : DAYS_IN_MONTH[month];
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}
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export function copyTimestamp(timestamp) {
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const {
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date,
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time,
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year,
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month,
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day,
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weekday,
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hour,
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minute,
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hasDay,
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hasTime,
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past,
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present,
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future
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} = timestamp;
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return {
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date,
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time,
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year,
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month,
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day,
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weekday,
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hour,
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minute,
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hasDay,
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hasTime,
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past,
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present,
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future
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};
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}
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export function padNumber(x, length) {
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let padded = String(x);
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while (padded.length < length) {
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padded = '0' + padded;
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}
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return padded;
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}
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export function getDate(timestamp) {
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let str = `${padNumber(timestamp.year, 4)}-${padNumber(timestamp.month, 2)}`;
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if (timestamp.hasDay) str += `-${padNumber(timestamp.day, 2)}`;
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return str;
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}
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export function getTime(timestamp) {
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if (!timestamp.hasTime) {
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return '';
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}
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return `${padNumber(timestamp.hour, 2)}:${padNumber(timestamp.minute, 2)}`;
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}
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export function nextMinutes(timestamp, minutes) {
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timestamp.minute += minutes;
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while (timestamp.minute > MINUTES_IN_HOUR) {
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timestamp.minute -= MINUTES_IN_HOUR;
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timestamp.hour++;
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if (timestamp.hour >= HOURS_IN_DAY) {
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nextDay(timestamp);
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timestamp.hour = FIRST_HOUR;
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}
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}
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return timestamp;
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}
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export function nextDay(timestamp) {
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timestamp.day++;
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timestamp.weekday = (timestamp.weekday + 1) % DAYS_IN_WEEK;
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if (timestamp.day > DAYS_IN_MONTH_MIN && timestamp.day > daysInMonth(timestamp.year, timestamp.month)) {
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timestamp.day = DAY_MIN;
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timestamp.month++;
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if (timestamp.month > MONTH_MAX) {
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timestamp.month = MONTH_MIN;
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timestamp.year++;
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}
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}
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return timestamp;
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}
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export function prevDay(timestamp) {
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timestamp.day--;
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timestamp.weekday = (timestamp.weekday + 6) % DAYS_IN_WEEK;
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if (timestamp.day < DAY_MIN) {
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timestamp.month--;
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if (timestamp.month < MONTH_MIN) {
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timestamp.year--;
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timestamp.month = MONTH_MAX;
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}
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timestamp.day = daysInMonth(timestamp.year, timestamp.month);
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}
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return timestamp;
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}
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export function relativeDays(timestamp, mover = nextDay, days = 1) {
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while (--days >= 0) mover(timestamp);
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return timestamp;
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}
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export function findWeekday(timestamp, weekday, mover = nextDay, maxDays = 6) {
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while (timestamp.weekday !== weekday && --maxDays >= 0) mover(timestamp);
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return timestamp;
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}
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export function getWeekdaySkips(weekdays) {
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const skips = [1, 1, 1, 1, 1, 1, 1];
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const filled = [0, 0, 0, 0, 0, 0, 0];
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for (let i = 0; i < weekdays.length; i++) {
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filled[weekdays[i]] = 1;
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}
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for (let k = 0; k < DAYS_IN_WEEK; k++) {
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let skip = 1;
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for (let j = 1; j < DAYS_IN_WEEK; j++) {
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const next = (k + j) % DAYS_IN_WEEK;
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if (filled[next]) {
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break;
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}
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skip++;
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}
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skips[k] = filled[k] * skip;
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}
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return skips;
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}
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export function createDayList(start, end, now, weekdaySkips, max = 42, min = 0) {
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const stop = getDayIdentifier(end);
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const days = [];
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let current = copyTimestamp(start);
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let currentIdentifier = 0;
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let stopped = currentIdentifier === stop;
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if (stop < getDayIdentifier(start)) {
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throw new Error('End date is earlier than start date.');
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}
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while ((!stopped || days.length < min) && days.length < max) {
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currentIdentifier = getDayIdentifier(current);
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stopped = stopped || currentIdentifier === stop;
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if (weekdaySkips[current.weekday] === 0) {
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current = nextDay(current);
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continue;
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}
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const day = copyTimestamp(current);
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updateFormatted(day);
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updateRelative(day, now);
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days.push(day);
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current = relativeDays(current, nextDay, weekdaySkips[current.weekday]);
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}
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if (!days.length) throw new Error('No dates found using specified start date, end date, and weekdays.');
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return days;
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}
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export function createIntervalList(timestamp, first, minutes, count, now) {
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const intervals = [];
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for (let i = 0; i < count; i++) {
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const mins = (first + i) * minutes;
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const int = copyTimestamp(timestamp);
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intervals.push(updateMinutes(int, mins, now));
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}
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return intervals;
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}
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export function createNativeLocaleFormatter(locale, getOptions) {
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const emptyFormatter = (_t, _s) => '';
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if (typeof Intl === 'undefined' || typeof Intl.DateTimeFormat === 'undefined') {
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return emptyFormatter;
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}
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return (timestamp, short) => {
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try {
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const intlFormatter = new Intl.DateTimeFormat(locale || undefined, getOptions(timestamp, short));
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const time = `${padNumber(timestamp.hour, 2)}:${padNumber(timestamp.minute, 2)}`;
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const date = timestamp.date;
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return intlFormatter.format(new Date(`${date}T${time}:00+00:00`));
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} catch (e) {
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return '';
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}
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};
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}
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//# sourceMappingURL=timestamp.js.map
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