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import {
integerBetween,
isLeapYear,
timeObject,
daysInYear,
daysInMonth,
weeksInWeekYear,
isInteger,
} from "./util.js";
import Invalid from "./invalid.js";
const nonLeapLadder = [0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334],
leapLadder = [0, 31, 60, 91, 121, 152, 182, 213, 244, 274, 305, 335];
function unitOutOfRange(unit, value) {
return new Invalid(
"unit out of range",
`you specified ${value} (of type ${typeof value}) as a ${unit}, which is invalid`
);
}
function dayOfWeek(year, month, day) {
const d = new Date(Date.UTC(year, month - 1, day));
if (year < 100 && year >= 0) {
d.setUTCFullYear(d.getUTCFullYear() - 1900);
}
const js = d.getUTCDay();
return js === 0 ? 7 : js;
}
function computeOrdinal(year, month, day) {
return day + (isLeapYear(year) ? leapLadder : nonLeapLadder)[month - 1];
}
function uncomputeOrdinal(year, ordinal) {
const table = isLeapYear(year) ? leapLadder : nonLeapLadder,
month0 = table.findIndex((i) => i < ordinal),
day = ordinal - table[month0];
return { month: month0 + 1, day };
}
/**
* @private
*/
export function gregorianToWeek(gregObj) {
const { year, month, day } = gregObj,
ordinal = computeOrdinal(year, month, day),
weekday = dayOfWeek(year, month, day);
let weekNumber = Math.floor((ordinal - weekday + 10) / 7),
weekYear;
if (weekNumber < 1) {
weekYear = year - 1;
weekNumber = weeksInWeekYear(weekYear);
} else if (weekNumber > weeksInWeekYear(year)) {
weekYear = year + 1;
weekNumber = 1;
} else {
weekYear = year;
}
return { weekYear, weekNumber, weekday, ...timeObject(gregObj) };
}
export function weekToGregorian(weekData) {
const { weekYear, weekNumber, weekday } = weekData,
weekdayOfJan4 = dayOfWeek(weekYear, 1, 4),
yearInDays = daysInYear(weekYear);
let ordinal = weekNumber * 7 + weekday - weekdayOfJan4 - 3,
year;
if (ordinal < 1) {
year = weekYear - 1;
ordinal += daysInYear(year);
} else if (ordinal > yearInDays) {
year = weekYear + 1;
ordinal -= daysInYear(weekYear);
} else {
year = weekYear;
}
const { month, day } = uncomputeOrdinal(year, ordinal);
return { year, month, day, ...timeObject(weekData) };
}
export function gregorianToOrdinal(gregData) {
const { year, month, day } = gregData;
const ordinal = computeOrdinal(year, month, day);
return { year, ordinal, ...timeObject(gregData) };
}
export function ordinalToGregorian(ordinalData) {
const { year, ordinal } = ordinalData;
const { month, day } = uncomputeOrdinal(year, ordinal);
return { year, month, day, ...timeObject(ordinalData) };
}
export function hasInvalidWeekData(obj) {
const validYear = isInteger(obj.weekYear),
validWeek = integerBetween(obj.weekNumber, 1, weeksInWeekYear(obj.weekYear)),
validWeekday = integerBetween(obj.weekday, 1, 7);
if (!validYear) {
return unitOutOfRange("weekYear", obj.weekYear);
} else if (!validWeek) {
return unitOutOfRange("week", obj.week);
} else if (!validWeekday) {
return unitOutOfRange("weekday", obj.weekday);
} else return false;
}
export function hasInvalidOrdinalData(obj) {
const validYear = isInteger(obj.year),
validOrdinal = integerBetween(obj.ordinal, 1, daysInYear(obj.year));
if (!validYear) {
return unitOutOfRange("year", obj.year);
} else if (!validOrdinal) {
return unitOutOfRange("ordinal", obj.ordinal);
} else return false;
}
export function hasInvalidGregorianData(obj) {
const validYear = isInteger(obj.year),
validMonth = integerBetween(obj.month, 1, 12),
validDay = integerBetween(obj.day, 1, daysInMonth(obj.year, obj.month));
if (!validYear) {
return unitOutOfRange("year", obj.year);
} else if (!validMonth) {
return unitOutOfRange("month", obj.month);
} else if (!validDay) {
return unitOutOfRange("day", obj.day);
} else return false;
}
export function hasInvalidTimeData(obj) {
const { hour, minute, second, millisecond } = obj;
const validHour =
integerBetween(hour, 0, 23) ||
(hour === 24 && minute === 0 && second === 0 && millisecond === 0),
validMinute = integerBetween(minute, 0, 59),
validSecond = integerBetween(second, 0, 59),
validMillisecond = integerBetween(millisecond, 0, 999);
if (!validHour) {
return unitOutOfRange("hour", hour);
} else if (!validMinute) {
return unitOutOfRange("minute", minute);
} else if (!validSecond) {
return unitOutOfRange("second", second);
} else if (!validMillisecond) {
return unitOutOfRange("millisecond", millisecond);
} else return false;
}
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