@hebcal/leyning/dist/esm/getLeyningKeyForEvent.js

Torah Reading API for Parashat HaShavua and holidays

/*! @hebcal/leyning v9.5.4 */
import { months, HDate } from '@hebcal/hdate';
import { flags } from '@hebcal/core/dist/esm/event';
import { hasFestival } from './festival.js';

const HOLIDAY_IGNORE_MASK = flags.DAF_YOMI |
    flags.OMER_COUNT |
    flags.SHABBAT_MEVARCHIM |
    flags.MOLAD |
    flags.USER_EVENT |
    flags.HEBREW_DATE |
    flags.MISHNA_YOMI |
    flags.MODERN_HOLIDAY |
    flags.YERUSHALMI_YOMI;
/**
 * Based on the event date, type and title, finds the relevant leyning key
 * @param ev event
 * @param [il] true if Israel holiday scheme
 * @returns key to look up in holiday-reading.json
 */
function getLeyningKeyForEvent(ev, il = false) {
    // eslint-disable-next-line @typescript-eslint/no-explicit-any
    if (ev.eventTime !== undefined) {
        return undefined;
    }
    const mask = ev.getFlags();
    if (mask & HOLIDAY_IGNORE_MASK) {
        return undefined;
    }
    // Skip all Erevs except for Simchat Torah
    const desc = ev.getDesc();
    if (mask & flags.EREV && !hasFestival(desc)) {
        return undefined;
    }
    const hd = ev.getDate();
    const day = hd.getDate();
    const dow = hd.abs() % 7;
    const month = hd.getMonth();
    const isShabbat = dow === 6;
    const isRoshChodesh = day === 1 || day === 30;
    const holiday = ev.basename();
    const isPesach = holiday === 'Pesach';
    if (il && isPesach) {
        if (isShabbat) {
            return day === 15 || day === 21
                ? desc + ' (on Shabbat)'
                : 'Pesach Shabbat Chol ha-Moed';
        }
        return desc;
    }
    if (day === 1 && month === months.TISHREI) {
        return isShabbat ? 'Rosh Hashana I (on Shabbat)' : 'Rosh Hashana I';
    }
    // eslint-disable-next-line @typescript-eslint/no-explicit-any
    const cholHaMoedDay = ev.cholHaMoedDay;
    if (typeof cholHaMoedDay === 'number') {
        // Sukkot or Pesach
        if (isShabbat) {
            return holiday + ' Shabbat Chol ha-Moed';
        }
        else if (desc === 'Sukkot VII (Hoshana Raba)') {
            return 'Sukkot Final Day (Hoshana Raba)';
        }
        if (isPesach && cholHaMoedDay) {
            if (dow === 0 && desc === "Pesach IV (CH''M)") {
                return 'Pesach Chol ha-Moed Day 2 on Sunday';
            }
            else if (dow === 1 && desc === "Pesach V (CH''M)") {
                return 'Pesach Chol ha-Moed Day 3 on Monday';
            }
        }
        return `${holiday} Chol ha-Moed Day ${cholHaMoedDay}`;
    }
    // eslint-disable-next-line @typescript-eslint/no-explicit-any
    const chanukahDay = ev.chanukahDay;
    if (typeof chanukahDay === 'number') {
        if (isShabbat && isRoshChodesh) {
            return 'Shabbat Rosh Chodesh Chanukah';
        }
        else if (isRoshChodesh && chanukahDay === 7) {
            return 'Chanukah Day 7 (on Rosh Chodesh)';
        }
        else if (isShabbat) {
            return `Chanukah Day ${chanukahDay} (on Shabbat)`;
        }
        else {
            return `Chanukah Day ${chanukahDay}`;
        }
    }
    if (isRoshChodesh &&
        (desc === 'Shabbat HaChodesh' || desc === 'Shabbat Shekalim')) {
        return desc + ' (on Rosh Chodesh)';
    }
    if (il && desc === 'Shmini Atzeret') {
        return 'Simchat Torah' + (isShabbat ? ' (on Shabbat)' : '');
    }
    if (desc === 'Chag HaBanot') {
        return undefined;
    }
    if (isShabbat && 'Shabbat' !== desc.substring(0, 7)) {
        if (isRoshChodesh) {
            if (desc === 'Rosh Chodesh Tevet') {
                return 'Shabbat Rosh Chodesh Chanukah';
            }
            return 'Shabbat Rosh Chodesh';
        }
        const desc2 = desc + ' (on Shabbat)';
        if (hasFestival(desc2)) {
            return desc2;
        }
    }
    if (hasFestival(desc)) {
        return desc;
    }
    if (isShabbat) {
        const tommorow = hd.next().getDate();
        if (tommorow === 30 || tommorow === 1) {
            return 'Shabbat Machar Chodesh';
        }
    }
    if (desc === 'Rosh Hashana LaBehemot') {
        return undefined;
    }
    if (desc === 'Rosh Chodesh Tevet') {
        if (isShabbat) {
            return 'Shabbat Rosh Chodesh Chanukah';
        }
        if (day === 30 || HDate.shortKislev(hd.getFullYear())) {
            return 'Chanukah Day 6'; // 30th of Kislev or 1st of Tevet
        }
        else {
            return 'Chanukah Day 7 (on Rosh Chodesh)'; // 1st of Tevet
        }
    }
    if (isRoshChodesh) {
        return desc;
    }
    if (desc === "Tish'a B'Av (observed)") {
        return "Tish'a B'Av";
    }
    return undefined;
}

export { HOLIDAY_IGNORE_MASK, getLeyningKeyForEvent };
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