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4534b41957
Computes the midpoint of the night (Maghrib to Fajr), commonly used as the Isha prayer endpoint. Also works with sunrise as the second anchor for the astronomical variant. Closes #1
44 lines
1.3 KiB
TypeScript
44 lines
1.3 KiB
TypeScript
/**
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* Formatted prayer times using the PrayCalc Dynamic Method.
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*/
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import { formatTime } from 'nrel-spa';
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import { getTimes } from './getTimes.js';
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import type { FormattedPrayerTimes } from './types.js';
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/**
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* Compute prayer times formatted as HH:MM:SS strings.
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*
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* Uses the dynamic twilight angle algorithm. See getTimes() for full parameter
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* documentation.
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*
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* @returns Prayer times as HH:MM:SS strings. Returns "N/A" for any time that
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* cannot be computed (polar night, unreachable angle, etc.).
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*/
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export function calcTimes(
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date: Date,
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lat: number,
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lng: number,
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tz: number = -date.getTimezoneOffset() / 60,
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elevation = 0,
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temperature = 15,
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pressure = 1013.25,
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hanafi = false,
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): FormattedPrayerTimes {
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const raw = getTimes(date, lat, lng, tz, elevation, temperature, pressure, hanafi);
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// Sort by fractional hour value so output reflects chronological order.
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// Angles are preserved as-is (not time values).
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return {
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Qiyam: formatTime(raw.Qiyam),
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Fajr: formatTime(raw.Fajr),
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Sunrise: formatTime(raw.Sunrise),
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Noon: formatTime(raw.Noon),
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Dhuhr: formatTime(raw.Dhuhr),
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Asr: formatTime(raw.Asr),
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Maghrib: formatTime(raw.Maghrib),
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Isha: formatTime(raw.Isha),
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Midnight: formatTime(raw.Midnight),
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angles: raw.angles,
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};
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}
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