quran-meta/lib_es/prevAyah.js

Library with meta data and functionality related to Holy Quran

import { meta } from "./const.js";
import { checkValidSurah } from "./validation.js";
import { findAyahIdBySurah } from "./findAyahIdBySurah.js";
import { findSurahAyahByAyahId } from "./findSurahAyahByAyahId.js";

//#region src/prevAyah.ts
/**
* Get the previous ayah for the given surah and ayah number.
* @param surah - The surah number.
* @param ayah - The ayah number within the surah.
* @returns The surah and ayah number of the previous ayah.
*/
function prevAyah(surah, ayah) {
	checkValidSurah(surah);
	const ayahId = findAyahIdBySurah(surah, ayah);
	return findSurahAyahByAyahId(ayahId == 1 ? meta.numAyahs : ayahId - 1);
}

//#endregion
export { prevAyah };