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function flatMap(arr, mapper) {
return arr.reduce((acc, val, i) => {
acc.push(...mapper(val, i, arr));
return acc;
}, []);
}
const predefinedCronStrings = {
'@yearly': '0 0 0 1 1 * *',
'@annually': '0 0 0 1 1 * *',
'@monthly': '0 0 0 1 * * *',
'@weekly': '0 0 0 * * 0 *',
'@daily': '0 0 0 * * * *',
'@midnight': '0 0 0 * * * *',
'@hourly': '0 0 * * * * *',
};
const monthReplacements = ['jan', 'feb', 'mar', 'apr', 'may', 'jun', 'jul', 'aug', 'sep', 'oct', 'nov', 'dec'];
const monthReplacementRegex = new RegExp(monthReplacements.join('|'), 'g');
const dayOfWeekReplacements = ['sun', 'mon', 'tue', 'wed', 'thu', 'fri', 'sat'];
const dayOfWeekReplacementRegex = new RegExp(dayOfWeekReplacements.join('|'), 'g');
/*
"The actual range of times supported by ECMAScript Date objects is slightly smaller:
exactly –100,000,000 days to 100,000,000 days measured relative to midnight at the
beginning of 01 January, 1970 UTC. This gives a range of 8,640,000,000,000,000
milliseconds to either side of 01 January, 1970 UTC."
http://ecma-international.org/ecma-262/5.1/#sec-15.9.1.1
new Date(8640000000000000) => 00:00:00 13th Sep 275760
Largest full year valid as JS date = 275759
*/
const maxValidYear = 275759;
var WarningType;
(function (WarningType) {
WarningType["IncrementLargerThanRange"] = "IncrementLargerThanRange";
})(WarningType || (WarningType = {}));
function _parse(cronstring) {
let expr = cronstring.trim().toLowerCase();
if (predefinedCronStrings[expr]) {
expr = predefinedCronStrings[expr];
}
const fields = expr.split(/\s+/g);
if (fields.length < 5 || fields.length > 7) {
throw new Error('Expression must have at least 5 fields, and no more than 7 fields');
}
switch (fields.length) {
case 5:
fields.unshift('0');
case 6:
fields.push('*');
}
return [
new SecondsOrMinutesField(fields[0]),
new SecondsOrMinutesField(fields[1]),
new HoursField(fields[2]),
new DaysField(fields[3], fields[5]),
new MonthsField(fields[4]),
new YearsField(fields[6])
];
}
function getIncrementLargerThanRangeWarnings(items, first, last) {
const warnings = [];
for (let item of items) {
let rangeLength;
if (item.step > 1 &&
item.step > (rangeLength = item.rangeLength(first, last))) {
warnings.push({
type: WarningType.IncrementLargerThanRange,
message: `Increment (${item.step}) is larger than range (${rangeLength}) for expression '${item.itemString}'`
});
}
}
return warnings;
}
class Field {
constructor(field) {
this.field = field;
}
parse() {
return this.field.split(',')
.map(item => FieldItem.parse(item, this.first, this.last, true));
}
get items() {
if (!this._items)
this._items = this.parse();
return this._items;
}
get values() {
return Field.getValues(this.items, this.first, this.last);
}
get warnings() {
return getIncrementLargerThanRangeWarnings(this.items, this.first, this.last);
}
static getValues(items, first, last) {
return Array.from(new Set(flatMap(items, item => item.values(first, last)))).sort(sortAsc);
}
}
class FieldItem {
constructor(itemString) {
this.itemString = itemString;
this.step = 1;
}
rangeLength(first, last) {
var _a, _b, _c, _d;
const start = (_b = (_a = this.range) === null || _a === void 0 ? void 0 : _a.from) !== null && _b !== void 0 ? _b : first, end = (_d = (_c = this.range) === null || _c === void 0 ? void 0 : _c.to) !== null && _d !== void 0 ? _d : last;
return (end < start) ? ((last - start) + (end - first) + 1) : (end - start);
}
values(first, last) {
const start = this.range ? this.range.from : first, rangeLength = this.rangeLength(first, last);
return Array(Math.floor(rangeLength / this.step) + 1)
.fill(0)
.map((_, i) => first + ((start - first + (this.step * i)) % (last - first + 1)));
}
get any() {
return this.range === undefined && this.step === 1;
}
get single() {
return !!this.range && this.range.from === this.range.to;
}
static parse(item, first, last, allowCyclicRange = false, transformer) {
var _a;
const fieldItem = new FieldItem(item);
const [match, all, startFrom, range, step] = ((_a = item.match(/^(?:(\*)|([0-9]+)|([0-9]+-[0-9]+))(?:\/([1-9][0-9]*))?$/)) !== null && _a !== void 0 ? _a : []);
if (!match)
throw new Error('Field item invalid format');
if (step) {
fieldItem.step = parseInt(step, 10);
}
if (startFrom) {
let start = parseInt(startFrom, 10);
start = transformer ? transformer(start) : start;
if (start < first || start > last)
throw new Error('Field item out of valid value range');
fieldItem.range = {
from: start,
to: step ? undefined : start
};
}
else if (range) {
const [rangeStart, rangeEnd] = range.split('-').map(x => {
const n = parseInt(x, 10);
return transformer ? transformer(n) : n;
});
if (rangeStart < first || rangeStart > last || rangeEnd < first || rangeEnd > last ||
(rangeEnd < rangeStart && !allowCyclicRange)) {
throw new Error('Field item range invalid, either value out of valid range or start greater than end in non wraparound field');
}
fieldItem.range = {
from: rangeStart,
to: rangeEnd
};
}
return fieldItem;
}
}
FieldItem.asterisk = new FieldItem('*');
class SecondsOrMinutesField extends Field {
constructor() {
super(...arguments);
this.first = 0;
this.last = 59;
}
}
class HoursField extends Field {
constructor() {
super(...arguments);
this.first = 0;
this.last = 23;
}
}
class DaysField {
constructor(daysOfMonthField, daysOfWeekField) {
this.lastDay = false;
this.lastWeekday = false;
this.daysItems = [];
this.nearestWeekdayItems = [];
this.daysOfWeekItems = [];
this.lastDaysOfWeekItems = [];
this.nthDaysOfWeekItems = [];
for (let item of daysOfMonthField.split(',').map(s => s === '?' ? '*' : s)) {
if (item === 'l') {
this.lastDay = true;
}
else if (item === 'lw') {
this.lastWeekday = true;
}
else if (item.endsWith('w')) {
this.nearestWeekdayItems.push(FieldItem.parse(item.slice(0, -1), 1, 31));
}
else {
this.daysItems.push(FieldItem.parse(item, 1, 31));
}
}
const normalisedDaysOfWeekField = daysOfWeekField.replace(dayOfWeekReplacementRegex, match => dayOfWeekReplacements.indexOf(match) + '');
const parseDayOfWeek = (item) => FieldItem.parse(item, 0, 6, true, n => n === 7 ? 0 : n);
for (let item of normalisedDaysOfWeekField.split(',').map(s => s === '?' ? '*' : s)) {
const nthIndex = item.lastIndexOf('#');
if (item.endsWith('l')) {
this.lastDaysOfWeekItems.push(parseDayOfWeek(item.slice(0, -1)));
}
else if (nthIndex !== -1) {
const nth = item.slice(nthIndex + 1);
if (!/^[1-5]$/.test(nth))
throw new Error('Field item nth of month (#) invalid');
this.nthDaysOfWeekItems.push({
item: parseDayOfWeek(item.slice(0, nthIndex)),
nth: parseInt(nth, 10)
});
}
else {
this.daysOfWeekItems.push(parseDayOfWeek(item));
}
}
}
get values() {
return DaysFieldValues.fromField(this);
}
get warnings() {
const warnings = [], dayItems = [
...this.daysItems,
...this.nearestWeekdayItems,
], weekItems = [
...this.daysOfWeekItems,
...this.lastDaysOfWeekItems,
...this.nthDaysOfWeekItems.map(({ item }) => item),
];
warnings.push(...getIncrementLargerThanRangeWarnings(dayItems, 1, 31), ...getIncrementLargerThanRangeWarnings(weekItems, 0, 6));
return warnings;
}
get allDays() {
return (!this.lastDay &&
!this.lastWeekday &&
!this.nearestWeekdayItems.length &&
!this.lastDaysOfWeekItems.length &&
!this.nthDaysOfWeekItems.length &&
this.daysItems.length === 1 && this.daysItems[0].any &&
this.daysOfWeekItems.length === 1 && this.daysOfWeekItems[0].any);
}
}
class DaysFieldValues {
constructor() {
this.lastDay = false;
this.lastWeekday = false;
this.days = [];
this.nearestWeekday = [];
this.daysOfWeek = [];
this.lastDaysOfWeek = [];
this.nthDaysOfWeek = [];
}
static fromField(field) {
const values = new DaysFieldValues();
const filterAnyItems = (items) => items.filter(item => !item.any);
values.lastDay = field.lastDay;
values.lastWeekday = field.lastWeekday;
values.days = Field.getValues(field.allDays ? [FieldItem.asterisk] : filterAnyItems(field.daysItems), 1, 31);
values.nearestWeekday = Field.getValues(field.nearestWeekdayItems, 1, 31);
values.daysOfWeek = Field.getValues(filterAnyItems(field.daysOfWeekItems), 0, 6);
values.lastDaysOfWeek = Field.getValues(field.lastDaysOfWeekItems, 0, 6);
const nthDaysHashes = new Set();
for (let item of field.nthDaysOfWeekItems) {
for (let n of item.item.values(0, 6)) {
let hash = n * 10 + item.nth;
if (!nthDaysHashes.has(hash)) {
nthDaysHashes.add(hash);
values.nthDaysOfWeek.push([n, item.nth]);
}
}
}
return values;
}
getDays(year, month) {
const days = new Set(this.days);
const lastDateOfMonth = new Date(year, month, 0).getDate();
const firstDayOfWeek = new Date(year, month - 1, 1).getDay();
const getNearestWeekday = (day) => {
if (day > lastDateOfMonth)
day = lastDateOfMonth;
const dayOfWeek = (day + firstDayOfWeek - 1) % 7;
let weekday = day + (dayOfWeek === 0 ? 1 : (dayOfWeek === 6 ? -1 : 0));
return weekday + (weekday < 1 ? 3 : (weekday > lastDateOfMonth ? -3 : 0));
};
if (this.lastDay) {
days.add(lastDateOfMonth);
}
if (this.lastWeekday) {
days.add(getNearestWeekday(lastDateOfMonth));
}
for (const day of this.nearestWeekday) {
days.add(getNearestWeekday(day));
}
if (this.daysOfWeek.length ||
this.lastDaysOfWeek.length ||
this.nthDaysOfWeek.length) {
const daysOfWeek = Array(7).fill(0).map(() => ([]));
for (let day = 1; day < 36; day++) {
daysOfWeek[(day + firstDayOfWeek - 1) % 7].push(day);
}
for (const dayOfWeek of this.daysOfWeek) {
for (const day of daysOfWeek[dayOfWeek]) {
days.add(day);
}
}
for (const dayOfWeek of this.lastDaysOfWeek) {
for (let i = daysOfWeek[dayOfWeek].length - 1; i >= 0; i--) {
if (daysOfWeek[dayOfWeek][i] <= lastDateOfMonth) {
days.add(daysOfWeek[dayOfWeek][i]);
break;
}
}
}
for (const [dayOfWeek, nthOfMonth] of this.nthDaysOfWeek) {
days.add(daysOfWeek[dayOfWeek][nthOfMonth - 1]);
}
}
return Array.from(days).filter(day => day <= lastDateOfMonth).sort(sortAsc);
}
}
class MonthsField extends Field {
constructor(field) {
super(field.replace(monthReplacementRegex, match => {
return monthReplacements.indexOf(match) + 1 + '';
}));
this.first = 1;
this.last = 12;
}
}
class YearsField extends Field {
constructor(field) {
super(field);
this.first = 1970;
this.last = 2099;
this.items;
}
parse() {
return this.field.split(',')
.map(item => FieldItem.parse(item, 0, maxValidYear));
}
get warnings() {
return getIncrementLargerThanRangeWarnings(this.items, this.first, maxValidYear);
}
nextYear(fromYear) {
var _a;
return (_a = this.items.reduce((years, item) => {
var _a, _b, _c, _d;
if (item.any)
years.push(fromYear);
else if (item.single) {
const year = item.range.from;
if (year >= fromYear)
years.push(year);
}
else {
const start = (_b = (_a = item.range) === null || _a === void 0 ? void 0 : _a.from) !== null && _b !== void 0 ? _b : this.first;
if (start > fromYear)
years.push(start);
else {
const nextYear = start + Math.ceil((fromYear - start) / item.step) * item.step;
if (nextYear <= ((_d = (_c = item.range) === null || _c === void 0 ? void 0 : _c.to) !== null && _d !== void 0 ? _d : maxValidYear))
years.push(nextYear);
}
}
return years;
}, []).sort(sortAsc)[0]) !== null && _a !== void 0 ? _a : null;
}
}
class CronosDate {
constructor(year, month = 1, day = 1, hour = 0, minute = 0, second = 0) {
this.year = year;
this.month = month;
this.day = day;
this.hour = hour;
this.minute = minute;
this.second = second;
}
static fromDate(date, timezone) {
if (!timezone) {
return new CronosDate(date.getFullYear(), date.getMonth() + 1, date.getDate(), date.getHours(), date.getMinutes(), date.getSeconds());
}
return timezone['nativeDateToCronosDate'](date);
}
toDate(timezone) {
if (!timezone) {
return new Date(this.year, this.month - 1, this.day, this.hour, this.minute, this.second);
}
return timezone['cronosDateToNativeDate'](this);
}
static fromUTCTimestamp(timestamp) {
const date = new Date(timestamp);
return new CronosDate(date.getUTCFullYear(), date.getUTCMonth() + 1, date.getUTCDate(), date.getUTCHours(), date.getUTCMinutes(), date.getUTCSeconds());
}
toUTCTimestamp() {
return Date.UTC(this.year, this.month - 1, this.day, this.hour, this.minute, this.second);
}
copyWith({ year = this.year, month = this.month, day = this.day, hour = this.hour, minute = this.minute, second = this.second } = {}) {
return new CronosDate(year, month, day, hour, minute, second);
}
}
// Adapted from Intl.DateTimeFormat timezone handling in https://github.com/moment/luxon
const ZoneCache = new Map();
class CronosTimezone {
constructor(IANANameOrOffset) {
if (typeof IANANameOrOffset === 'number') {
if (IANANameOrOffset > 840 || IANANameOrOffset < -840)
throw new Error('Invalid offset');
this.fixedOffset = IANANameOrOffset;
return this;
}
const offsetMatch = IANANameOrOffset.match(/^([+-]?)(0[1-9]|1[0-4])(?::?([0-5][0-9]))?$/);
if (offsetMatch) {
this.fixedOffset = (offsetMatch[1] === '-' ? -1 : 1) * ((parseInt(offsetMatch[2], 10) * 60) + (parseInt(offsetMatch[3], 10) || 0));
return this;
}
if (ZoneCache.has(IANANameOrOffset)) {
return ZoneCache.get(IANANameOrOffset);
}
try {
this.dateTimeFormat = new Intl.DateTimeFormat("en-US", {
hour12: false,
timeZone: IANANameOrOffset,
year: "numeric",
month: "2-digit",
day: "2-digit",
hour: "2-digit",
minute: "2-digit",
second: "2-digit"
});
}
catch (err) {
throw new Error('Invalid IANA name or offset');
}
this.zoneName = IANANameOrOffset;
const currentYear = new Date().getUTCFullYear();
this.winterOffset = this.offset(Date.UTC(currentYear, 0, 1));
this.summerOffset = this.offset(Date.UTC(currentYear, 5, 1));
ZoneCache.set(IANANameOrOffset, this);
}
toString() {
if (this.fixedOffset) {
const absOffset = Math.abs(this.fixedOffset);
return [
this.fixedOffset < 0 ? '-' : '+',
Math.floor(absOffset / 60).toString().padStart(2, '0'),
(absOffset % 60).toString().padStart(2, '0')
].join('');
}
return this.zoneName;
}
offset(ts) {
if (!this.dateTimeFormat)
return this.fixedOffset || 0;
const date = new Date(ts);
const { year, month, day, hour, minute, second } = this.nativeDateToCronosDate(date);
const asUTC = Date.UTC(year, month - 1, day, hour, minute, second), asTS = ts - (ts % 1000);
return (asUTC - asTS) / 60000;
}
nativeDateToCronosDate(date) {
if (!this.dateTimeFormat) {
return CronosDate['fromUTCTimestamp'](date.getTime() + (this.fixedOffset || 0) * 60000);
}
return this.dateTimeFormat['formatToParts']
? partsOffset(this.dateTimeFormat, date)
: hackyOffset(this.dateTimeFormat, date);
}
cronosDateToNativeDate(date) {
if (!this.dateTimeFormat) {
return new Date(date['toUTCTimestamp']() - (this.fixedOffset || 0) * 60000);
}
const provisionalOffset = ((date.month > 3 || date.month < 11) ? this.summerOffset : this.winterOffset) || 0;
const UTCTimestamp = date['toUTCTimestamp']();
// Find the right offset a given local time.
// Our UTC time is just a guess because our offset is just a guess
let utcGuess = UTCTimestamp - provisionalOffset * 60000;
// Test whether the zone matches the offset for this ts
const o2 = this.offset(utcGuess);
// If so, offset didn't change and we're done
if (provisionalOffset === o2)
return new Date(utcGuess);
// If not, change the ts by the difference in the offset
utcGuess -= (o2 - provisionalOffset) * 60000;
// If that gives us the local time we want, we're done
const o3 = this.offset(utcGuess);
if (o2 === o3)
return new Date(utcGuess);
// If it's different, we're in a hole time. The offset has changed, but the we don't adjust the time
return new Date(UTCTimestamp - Math.min(o2, o3) * 60000);
}
}
function hackyOffset(dtf, date) {
const formatted = dtf.format(date).replace(/\u200E/g, ""), parsed = formatted.match(/(\d+)\/(\d+)\/(\d+),? (\d+):(\d+):(\d+)/), [, month, day, year, hour, minute, second] = (parsed !== null && parsed !== void 0 ? parsed : []).map(n => parseInt(n, 10));
return new CronosDate(year, month, day, hour % 24, minute, second);
}
function partsOffset(dtf, date) {
const formatted = dtf.formatToParts(date);
return new CronosDate(parseInt(formatted[4].value, 10), parseInt(formatted[0].value, 10), parseInt(formatted[2].value, 10), parseInt(formatted[6].value, 10) % 24, parseInt(formatted[8].value, 10), parseInt(formatted[10].value, 10));
}
const hourinms = 60 * 60 * 1000;
const findFirstFrom = (from, list) => list.findIndex(n => n >= from);
class CronosExpression {
constructor(cronString, seconds, minutes, hours, days, months, years) {
this.cronString = cronString;
this.seconds = seconds;
this.minutes = minutes;
this.hours = hours;
this.days = days;
this.months = months;
this.years = years;
this.skipRepeatedHour = true;
this.missingHour = 'insert';
this._warnings = null;
}
static parse(cronstring, options = {}) {
var _a;
const parsedFields = _parse(cronstring);
if (options.strict) {
let warnings = flatMap(parsedFields, field => field.warnings);
if (typeof options.strict === 'object') {
warnings = warnings
.filter(warning => !!options.strict[warning.type]);
}
if (warnings.length > 0) {
throw new Error(`Strict mode: Parsing failed with ${warnings.length} warnings`);
}
}
const expr = new CronosExpression(cronstring, parsedFields[0].values, parsedFields[1].values, parsedFields[2].values, parsedFields[3].values, parsedFields[4].values, parsedFields[5]);
expr.timezone = options.timezone instanceof CronosTimezone ? options.timezone :
(options.timezone !== undefined ? new CronosTimezone(options.timezone) : undefined);
expr.skipRepeatedHour = options.skipRepeatedHour !== undefined ? options.skipRepeatedHour : expr.skipRepeatedHour;
expr.missingHour = (_a = options.missingHour) !== null && _a !== void 0 ? _a : expr.missingHour;
return expr;
}
get warnings() {
if (!this._warnings) {
const parsedFields = _parse(this.cronString);
this._warnings = flatMap(parsedFields, field => field.warnings);
}
return this._warnings;
}
toString() {
var _a, _b;
const showTzOpts = !this.timezone || !!this.timezone.zoneName;
const timezone = Object.entries({
tz: (_b = (_a = this.timezone) === null || _a === void 0 ? void 0 : _a.toString()) !== null && _b !== void 0 ? _b : 'Local',
skipRepeatedHour: showTzOpts && this.skipRepeatedHour.toString(),
missingHour: showTzOpts && this.missingHour,
}).map(([key, val]) => val && key + ': ' + val).filter(s => s).join(', ');
return `${this.cronString} (${timezone})`;
}
nextDate(afterDate = new Date()) {
var _a;
const fromCronosDate = CronosDate.fromDate(afterDate, this.timezone);
if (((_a = this.timezone) === null || _a === void 0 ? void 0 : _a.fixedOffset) !== undefined) {
return this._next(fromCronosDate).date;
}
const fromTimestamp = afterDate.getTime(), fromLocalTimestamp = fromCronosDate['toUTCTimestamp'](), prevHourLocalTimestamp = CronosDate.fromDate(new Date(fromTimestamp - hourinms), this.timezone)['toUTCTimestamp'](), nextHourLocalTimestamp = CronosDate.fromDate(new Date(fromTimestamp + hourinms), this.timezone)['toUTCTimestamp'](), nextHourRepeated = nextHourLocalTimestamp - fromLocalTimestamp === 0, thisHourRepeated = fromLocalTimestamp - prevHourLocalTimestamp === 0, thisHourMissing = fromLocalTimestamp - prevHourLocalTimestamp === hourinms * 2;
if (this.skipRepeatedHour && thisHourRepeated) {
return this._next(fromCronosDate.copyWith({ minute: 59, second: 60 }), false).date;
}
if (this.missingHour === 'offset' && thisHourMissing) {
const nextDate = this._next(fromCronosDate.copyWith({ hour: fromCronosDate.hour - 1 })).date;
if (!nextDate || nextDate.getTime() > fromTimestamp)
return nextDate;
}
let { date: nextDate, cronosDate: nextCronosDate } = this._next(fromCronosDate);
if (this.missingHour !== 'offset' && nextCronosDate && nextDate) {
const nextDateNextHourTimestamp = nextCronosDate.copyWith({ hour: nextCronosDate.hour + 1 }).toDate(this.timezone).getTime();
if (nextDateNextHourTimestamp === nextDate.getTime()) {
if (this.missingHour === 'insert') {
return nextCronosDate.copyWith({ minute: 0, second: 0 }).toDate(this.timezone);
}
// this.missingHour === 'skip'
return this._next(nextCronosDate.copyWith({ minute: 59, second: 59 })).date;
}
}
if (!this.skipRepeatedHour) {
if (nextHourRepeated && (!nextDate || (nextDate.getTime() > fromTimestamp + hourinms))) {
nextDate = this._next(fromCronosDate.copyWith({ minute: 0, second: 0 }), false).date;
}
if (nextDate && nextDate < afterDate) {
nextDate = new Date(nextDate.getTime() + hourinms);
}
}
return nextDate;
}
_next(date, after = true) {
const nextDate = this._nextYear(after ? date.copyWith({ second: date.second + 1 }) : date);
return {
cronosDate: nextDate,
date: nextDate ? nextDate.toDate(this.timezone) : null
};
}
nextNDates(afterDate = new Date(), n = 5) {
const dates = [];
let lastDate = afterDate;
for (let i = 0; i < n; i++) {
const date = this.nextDate(lastDate);
if (!date)
break;
lastDate = date;
dates.push(date);
}
return dates;
}
_nextYear(fromDate) {
let year = fromDate.year;
let nextDate = null;
while (!nextDate) {
year = this.years.nextYear(year);
if (year === null)
return null;
nextDate = this._nextMonth((year === fromDate.year) ? fromDate : new CronosDate(year));
year++;
}
return nextDate;
}
_nextMonth(fromDate) {
let nextMonthIndex = findFirstFrom(fromDate.month, this.months);
let nextDate = null;
while (!nextDate) {
const nextMonth = this.months[nextMonthIndex];
if (nextMonth === undefined)
return null;
nextDate = this._nextDay((nextMonth === fromDate.month) ? fromDate : new CronosDate(fromDate.year, nextMonth));
nextMonthIndex++;
}
return nextDate;
}
_nextDay(fromDate) {
const days = this.days.getDays(fromDate.year, fromDate.month);
let nextDayIndex = findFirstFrom(fromDate.day, days);
let nextDate = null;
while (!nextDate) {
const nextDay = days[nextDayIndex];
if (nextDay === undefined)
return null;
nextDate = this._nextHour((nextDay === fromDate.day) ? fromDate : new CronosDate(fromDate.year, fromDate.month, nextDay));
nextDayIndex++;
}
return nextDate;
}
_nextHour(fromDate) {
let nextHourIndex = findFirstFrom(fromDate.hour, this.hours);
let nextDate = null;
while (!nextDate) {
const nextHour = this.hours[nextHourIndex];
if (nextHour === undefined)
return null;
nextDate = this._nextMinute((nextHour === fromDate.hour) ? fromDate :
new CronosDate(fromDate.year, fromDate.month, fromDate.day, nextHour));
nextHourIndex++;
}
return nextDate;
}
_nextMinute(fromDate) {
let nextMinuteIndex = findFirstFrom(fromDate.minute, this.minutes);
let nextDate = null;
while (!nextDate) {
const nextMinute = this.minutes[nextMinuteIndex];
if (nextMinute === undefined)
return null;
nextDate = this._nextSecond((nextMinute === fromDate.minute) ? fromDate :
new CronosDate(fromDate.year, fromDate.month, fromDate.day, fromDate.hour, nextMinute));
nextMinuteIndex++;
}
return nextDate;
}
_nextSecond(fromDate) {
const nextSecondIndex = findFirstFrom(fromDate.second, this.seconds), nextSecond = this.seconds[nextSecondIndex];
if (nextSecond === undefined)
return null;
return fromDate.copyWith({ second: nextSecond });
}
}
const maxTimeout = Math.pow(2, 31) - 1;
const scheduledTasks = [];
let runningTimer = null;
function addTask(task) {
if (task['_timestamp'] !== undefined) {
const insertIndex = scheduledTasks.findIndex(t => t['_timestamp'] < task['_timestamp']);
if (insertIndex >= 0)
scheduledTasks.splice(insertIndex, 0, task);
else
scheduledTasks.push(task);
}
}
function removeTask(task) {
const removeIndex = scheduledTasks.indexOf(task);
if (removeIndex >= 0)
scheduledTasks.splice(removeIndex, 1);
if (scheduledTasks.length === 0 && runningTimer) {
clearTimeout(runningTimer);
runningTimer = null;
}
}
function runScheduledTasks(skipRun = false) {
if (runningTimer)
clearTimeout(runningTimer);
const now = Date.now();
const removeIndex = scheduledTasks.findIndex(task => task['_timestamp'] <= now);
const tasksToRun = removeIndex >= 0 ? scheduledTasks.splice(removeIndex) : [];
for (let task of tasksToRun) {
if (!skipRun)
task['_runTask']();
if (task.isRunning) {
task['_updateTimestamp']();
addTask(task);
}
}
const nextTask = scheduledTasks[scheduledTasks.length - 1];
if (nextTask) {
runningTimer = setTimeout(runScheduledTasks, Math.min(nextTask['_timestamp'] - Date.now(), maxTimeout));
}
else
runningTimer = null;
}
function refreshSchedulerTimer() {
for (const task of scheduledTasks) {
task['_updateTimestamp']();
if (!task.isRunning)
removeTask(task);
}
scheduledTasks.sort((a, b) => b['_timestamp'] - a['_timestamp']);
runScheduledTasks(true);
}
class DateArraySequence {
constructor(dateLikes) {
this._dates = dateLikes.map(dateLike => {
const date = new Date(dateLike);
if (isNaN(date.getTime()))
throw new Error('Invalid date');
return date;
}).sort((a, b) => a.getTime() - b.getTime());
}
nextDate(afterDate) {
const nextIndex = this._dates.findIndex(d => d > afterDate);
return nextIndex === -1 ? null : this._dates[nextIndex];
}
}
class CronosTask {
constructor(sequenceOrDates) {
this._listeners = {
'started': new Set(),
'stopped': new Set(),
'run': new Set(),
'ended': new Set(),
};
if (Array.isArray(sequenceOrDates))
this._sequence = new DateArraySequence(sequenceOrDates);
else if (typeof sequenceOrDates === 'string' ||
typeof sequenceOrDates === 'number' ||
sequenceOrDates instanceof Date)
this._sequence = new DateArraySequence([sequenceOrDates]);
else
this._sequence = sequenceOrDates;
}
start() {
if (!this.isRunning) {
this._updateTimestamp();
addTask(this);
runScheduledTasks();
if (this.isRunning)
this._emit('started');
}
return this;
}
stop() {
if (this.isRunning) {
this._timestamp = undefined;
removeTask(this);
this._emit('stopped');
}
return this;
}
get nextRun() {
return this.isRunning ? new Date(this._timestamp) : undefined;
}
get isRunning() {
return this._timestamp !== undefined;
}
_runTask() {
this._emit('run', this._timestamp);
}
_updateTimestamp() {
const nextDate = this._sequence.nextDate(new Date());
this._timestamp = nextDate ? nextDate.getTime() : undefined;
if (!this.isRunning)
this._emit('ended');
}
on(event, listener) {
this._listeners[event].add(listener);
return this;
}
off(event, listener) {
this._listeners[event].delete(listener);
return this;
}
_emit(event, ...args) {
this._listeners[event].forEach((listener) => {
listener.call(this, ...args);
});
}
}
function scheduleTask(cronString, task, options) {
const expression = CronosExpression.parse(cronString, options);
return new CronosTask(expression)
.on('run', task)
.start();
}
function validate(cronString, options) {
try {
CronosExpression.parse(cronString, options);
}
catch {
return false;
}
return true;
}
export { CronosExpression, CronosTask, CronosTimezone, refreshSchedulerTimer, scheduleTask, validate };
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