adhan-extended/lib/esm/SunnahTimes.js

High precision Islamic prayer time library (extended)

import { dateByAddingDays, dateByAddingSeconds, roundedMinute } from './DateUtils';
import PrayerTimes from './PrayerTimes';
export let MidnightMethod;

(function (MidnightMethod) {
  MidnightMethod["SunsetToSunrise"] = "SunsetToSunrise";
  MidnightMethod["SunsetToFajr"] = "SunsetToFajr";
})(MidnightMethod || (MidnightMethod = {}));

export class SunnahTimes {
  /** night duration in milliseconds */
  constructor(prayerTimes, midnightMethod) {
    const date = prayerTimes.date;
    const nextDay = dateByAddingDays(date, 1);
    const nextDayPrayerTimes = new PrayerTimes(prayerTimes.coordinates, nextDay, prayerTimes.calculationParameters);
    let dawnTime;

    switch (midnightMethod) {
      case MidnightMethod.SunsetToFajr:
        dawnTime = nextDayPrayerTimes.fajr.getTime();
        break;

      case MidnightMethod.SunsetToSunrise:
      default:
        dawnTime = nextDayPrayerTimes.sunrise.getTime();
        break;
    }

    this.nightDuration = dawnTime - prayerTimes.sunset.getTime();
    const nightDurationSecs = this.nightDuration / 1000.0;
    this.firstThirdOfTheNight = roundedMinute(dateByAddingSeconds(prayerTimes.sunset, nightDurationSecs * (1 / 3)));
    this.middleOfTheNight = roundedMinute(dateByAddingSeconds(prayerTimes.sunset, nightDurationSecs / 2));
    this.lastThirdOfTheNight = roundedMinute(dateByAddingSeconds(prayerTimes.sunset, nightDurationSecs * (2 / 3)));
  }

}
export default SunnahTimes;
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