nse-business-time/src/utils/holiday-list.js

Calculate Business Time for NSE,BSE,MCX and NFO

const admin = require('firebase-admin');
const momentz = require('moment-timezone');

const _cnst = require('./constants');

async function getHolidayList(nodePath="_services/_holidays_list"){

    console.log('download data from ' + nodePath);
    let snapshot = await admin.database().ref(nodePath).once('value');
    if(snapshot.exists()){
        let _o_tmp = snapshot.val();
        _cnst.O_HLDY_LIST.NSE           = _o_tmp.NSE;
        _cnst.O_HLDY_LIST.BSE           = _o_tmp.NSE;
        _cnst.O_HLDY_LIST.NFO           = _o_tmp.NSE;
        _cnst.O_HLDY_LIST.MCX_MORNING   = _o_tmp.MCX_MORNING;
        _cnst.O_HLDY_LIST.MCX_EVENING   = _o_tmp.MCX_EVENING;

        _cnst.O_MKT_START.NSE           = _o_tmp._config.start_time.NSE;
        _cnst.O_MKT_START.BSE           = _o_tmp._config.start_time.BSE;
        _cnst.O_MKT_START.NFO           = _o_tmp._config.start_time.NFO;
        _cnst.O_MKT_START.MCX_MORNING   = _o_tmp._config.start_time.MCX_MORNING;
        _cnst.O_MKT_START.MCX_EVENING   = _o_tmp._config.start_time.MCX_EVENING;

        _cnst.O_MKT_END.NSE           = _o_tmp._config.end_time.NSE;
        _cnst.O_MKT_END.BSE           = _o_tmp._config.end_time.BSE;
        _cnst.O_MKT_END.NFO           = _o_tmp._config.end_time.NFO;
        _cnst.O_MKT_END.MCX_MORNING   = _o_tmp._config.end_time.MCX_MORNING;
        _cnst.O_MKT_END.MCX_EVENING   = _o_tmp._config.end_time.MCX_EVENING;

    }else{
        console.error("Holiday list is not available at ", nodePath);
    }
    return _cnst.O_MKT_END;
}


function isHoliday(exchange, currentTime){
    let day       =  momentz(currentTime).tz(_cnst.TIME_ZONE).format(_cnst.DATE_FORMAT);
    let weekday   =  momentz(currentTime).tz(_cnst.TIME_ZONE).isoWeekday();

    if(_cnst.O_HLDY_LIST[exchange].indexOf(day) > -1){
        return true;
    }else if([6,7].indexOf(weekday) > -1){
        return true;
    }else{
        return false;
    }
}

exports.getHolidayList = getHolidayList;
exports.isHoliday      = isHoliday;