127 lines
3.5 KiB
TypeScript
127 lines
3.5 KiB
TypeScript
import Big from 'big.js';
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const hoursDay = Big('24');
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const daysWeek = Big('7');
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const monthsYear = Big('12');
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const daysYear = Big('365.2425');
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const weeksYear = daysYear.div(daysWeek);
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const daysMonth = daysYear.div(monthsYear);
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const weeksMonth = daysMonth.div(daysWeek);
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interface DaysHours {
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mondayHours?: number
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tuesdayHours?: number
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wednesdayHours?: number
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thursdayHours?: number
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fridayHours?: number
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saturdayHours?: number
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sundayHours?: number
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}
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function prepareDurations({
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mondayHours = 24,
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tuesdayHours = 24,
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wednesdayHours = 24,
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thursdayHours = 24,
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fridayHours = 24,
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saturdayHours = 24,
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sundayHours = 24,
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}: DaysHours) {
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const durHoursWeek = Big(mondayHours).plus(tuesdayHours).plus(wednesdayHours).plus(thursdayHours).plus(fridayHours).plus(saturdayHours).plus(sundayHours);
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const durSecondsWeek = durHoursWeek.mul('3600');
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const durSecondsDay = durSecondsWeek.div(daysWeek);
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const durSecondsMonth = durSecondsWeek.mul(weeksMonth);
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const durSecondsQuarter = durSecondsMonth.mul('3');
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const durSecondsYear = durSecondsWeek.mul(weeksYear);
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const fullWeekHours = daysWeek.mul(hoursDay);
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return {
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durHoursWeek,
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durSecondsWeek,
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durSecondsDay,
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durSecondsMonth,
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durSecondsQuarter,
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durSecondsYear,
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fullWeekHours,
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};
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}
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export function downTimeToSLA({
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downTimeSeconds,
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mondayHours = 24,
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tuesdayHours = 24,
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wednesdayHours = 24,
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thursdayHours = 24,
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fridayHours = 24,
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saturdayHours = 24,
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sundayHours = 24,
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}: {
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downTimeSeconds: number
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} & DaysHours) {
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const {
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durHoursWeek,
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durSecondsWeek,
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durSecondsDay,
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durSecondsMonth,
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durSecondsQuarter,
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durSecondsYear,
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fullWeekHours,
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} = prepareDurations({
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mondayHours, tuesdayHours, wednesdayHours, thursdayHours, fridayHours, saturdayHours, sundayHours,
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});
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const one = Big('1');
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const hundred = Big('100');
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const downTimeSecondsBig = Big(downTimeSeconds);
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return {
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slaForDay: fullWeekHours.eq(durHoursWeek) ? one.minus(downTimeSecondsBig.div(durSecondsDay)).mul(hundred).toNumber() : null,
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slaForWeek: one.minus(downTimeSecondsBig.div(durSecondsWeek)).mul(hundred).toNumber(),
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slaForMonth: one.minus(downTimeSecondsBig.div(durSecondsMonth)).mul(hundred).toNumber(),
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slaForQuarter: one.minus(downTimeSecondsBig.div(durSecondsQuarter)).mul(hundred).toNumber(),
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slaForYear: one.minus(downTimeSecondsBig.div(durSecondsYear)).mul(hundred).toNumber(),
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};
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}
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export function slaToDowntimes({
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targetSLA,
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mondayHours = 24,
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tuesdayHours = 24,
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wednesdayHours = 24,
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thursdayHours = 24,
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fridayHours = 24,
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saturdayHours = 24,
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sundayHours = 24,
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}: {
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targetSLA: number
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mondayHours?: number
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tuesdayHours?: number
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wednesdayHours?: number
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thursdayHours?: number
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fridayHours?: number
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saturdayHours?: number
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sundayHours?: number
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}) {
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const {
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durHoursWeek,
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durSecondsWeek,
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durSecondsDay,
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durSecondsMonth,
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durSecondsQuarter,
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durSecondsYear,
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fullWeekHours,
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} = prepareDurations({
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mondayHours, tuesdayHours, wednesdayHours, thursdayHours, fridayHours, saturdayHours, sundayHours,
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});
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const allowedDowntime = Big('1').minus(Big(targetSLA).div('100'));
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return {
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secondsPerDay: fullWeekHours.eq(durHoursWeek) ? allowedDowntime.mul(durSecondsDay).toNumber() : null,
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secondsPerWeek: allowedDowntime.mul(durSecondsWeek).toNumber(),
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secondsPerMonth: allowedDowntime.mul(durSecondsMonth).toNumber(),
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secondsPerQuarter: allowedDowntime.mul(durSecondsQuarter).toNumber(),
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secondsPerYear: allowedDowntime.mul(durSecondsYear).toNumber(),
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};
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}
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