Gecko [ rhythmmedical.in ]

Name	Size	Permission
aliases.js	795 B	-rw-rw-rw-
constants.js	204 B	-rw-rw-rw-
day-of-month.js	1.04 KB	-rw-rw-rw-
day-of-week.js	11.69 KB	-rw-rw-rw-
day-of-year.js	990 B	-rw-rw-rw-
hour.js	4.26 KB	-rw-rw-rw-
millisecond.js	1.78 KB	-rw-rw-rw-
minute.js	680 B	-rw-rw-rw-
month.js	8.95 KB	-rw-rw-rw-
offset.js	6.71 KB	-rw-rw-rw-
priorities.js	369 B	-rw-rw-rw-
quarter.js	763 B	-rw-rw-rw-
second.js	680 B	-rw-rw-rw-
timestamp.js	594 B	-rw-rw-rw-
timezone.js	328 B	-rw-rw-rw-
units.js	404 B	-rw-rw-rw-
week-calendar-utils.js	2.09 KB	-rw-rw-rw-
week-year.js	3.14 KB	-rw-rw-rw-
week.js	1.66 KB	-rw-rw-rw-
year.js	1.92 KB	-rw-rw-rw-

Code Editor : week-calendar-utils.js

import { daysInYear } from './year';
import { createLocal } from '../create/local';
import { createUTCDate } from '../create/date-from-array';

// start-of-first-week - start-of-year
function firstWeekOffset(year, dow, doy) {
    var // first-week day -- which january is always in the first week (4 for iso, 1 for other)
        fwd = 7 + dow - doy,
        // first-week day local weekday -- which local weekday is fwd
        fwdlw = (7 + createUTCDate(year, 0, fwd).getUTCDay() - dow) % 7;

return -fwdlw + fwd - 1;
}

// https://en.wikipedia.org/wiki/ISO_week_date#Calculating_a_date_given_the_year.2C_week_number_and_weekday
export function dayOfYearFromWeeks(year, week, weekday, dow, doy) {
    var localWeekday = (7 + weekday - dow) % 7,
        weekOffset = firstWeekOffset(year, dow, doy),
        dayOfYear = 1 + 7 * (week - 1) + localWeekday + weekOffset,
        resYear, resDayOfYear;

if (dayOfYear <= 0) {
        resYear = year - 1;
        resDayOfYear = daysInYear(resYear) + dayOfYear;
    } else if (dayOfYear > daysInYear(year)) {
        resYear = year + 1;
        resDayOfYear = dayOfYear - daysInYear(year);
    } else {
        resYear = year;
        resDayOfYear = dayOfYear;
    }

return {
        year: resYear,
        dayOfYear: resDayOfYear
    };
}

export function weekOfYear(mom, dow, doy) {
    var weekOffset = firstWeekOffset(mom.year(), dow, doy),
        week = Math.floor((mom.dayOfYear() - weekOffset - 1) / 7) + 1,
        resWeek, resYear;

if (week < 1) {
        resYear = mom.year() - 1;
        resWeek = week + weeksInYear(resYear, dow, doy);
    } else if (week > weeksInYear(mom.year(), dow, doy)) {
        resWeek = week - weeksInYear(mom.year(), dow, doy);
        resYear = mom.year() + 1;
    } else {
        resYear = mom.year();
        resWeek = week;
    }

return {
        week: resWeek,
        year: resYear
    };
}

export function weeksInYear(year, dow, doy) {
    var weekOffset = firstWeekOffset(year, dow, doy),
        weekOffsetNext = firstWeekOffset(year + 1, dow, doy);
    return (daysInYear(year) - weekOffset + weekOffsetNext) / 7;
}

${this.title}

Code Editor : week-calendar-utils.js