nse-business-time/src/date-mgmt/open-and-scheduling-time.js

Calculate Business Time for NSE,BSE,MCX and NFO

const moment = require('moment');
const momentz = require('moment-timezone');
const _       = require('lodash');

const _cnst         = require('../utils/constants');
const _holidayList  = require('../utils/holiday-list');
const _date_utils   = require('./date-utils');


function covnertToString(milliseconds){
    return momentz(milliseconds).tz(_cnst.TIME_ZONE).format(_cnst.DATE_FORMAT);
}

//This method is tested & results are OK.
function marketOpenTime(time){
    
    console.log("-----------------------------------------");
    _.forEach(_cnst.ARR_EXCHANGES, (exchange) => {
        let tmpTime = time;
        while(_holidayList.isHoliday(exchange, tmpTime)){
            tmpTime = tmpTime + (24 * 60 * 60 * 1000);
        }

        console.log("OPEN " + exchange + " = " + momentz.tz(covnertToString(tmpTime) + " " + _cnst.O_MKT_START[exchange], _cnst.DATE_TIME_FORMAT, _cnst.TIME_ZONE).toString());
        let startDate= momentz.tz(covnertToString(tmpTime) + " " + _cnst.O_MKT_START[exchange], _cnst.DATE_TIME_FORMAT, _cnst.TIME_ZONE).valueOf();
        _cnst.O_MKT_TIMING.OPEN[exchange] = startDate;
    });

    _cnst.O_MKT_TIMING.OPEN['MCX'] = Math.min(_cnst.O_MKT_TIMING.OPEN.MCX_MORNING, _cnst.O_MKT_TIMING.OPEN.MCX_EVENING);
    console.log("OPEN MCX" + " = " + momentz(_cnst.O_MKT_TIMING.OPEN['MCX']).tz(_cnst.TIME_ZONE).format(_cnst.DATE_TIME_FORMAT));
    return _cnst.O_MKT_TIMING.OPEN;
}

//This method is tested & results are OK.
function marketCloseTime(time){
    console.log("-----------------------------------------");
    _.forEach(_cnst.ARR_EXCHANGES, (exchange) => {
        
        let tmpTime = time;
        while(_holidayList.isHoliday(exchange, tmpTime)){
            tmpTime = tmpTime + (24 * 60 * 60 * 1000);
        }

        console.log("CLOSE " + exchange + " = " +momentz.tz(covnertToString(tmpTime) + " " + _cnst.O_MKT_END[exchange], _cnst.DATE_TIME_FORMAT, _cnst.TIME_ZONE).toString());
        let endDate= momentz.tz(covnertToString(tmpTime) + " " + _cnst.O_MKT_END[exchange], _cnst.DATE_TIME_FORMAT, _cnst.TIME_ZONE).valueOf();
        _cnst.O_MKT_TIMING.CLOSE[exchange] = endDate;
    });

    
    if(_cnst.O_MKT_TIMING.CLOSE.MCX_EVENING - _cnst.O_MKT_TIMING.CLOSE.MCX_MORNING > (24 * 60 * 60 * 1000)){
        _cnst.O_MKT_TIMING.CLOSE['MCX'] = Math.max(_cnst.O_MKT_TIMING.CLOSE.MCX_MORNING, 0);
    }else{
        _cnst.O_MKT_TIMING.CLOSE['MCX'] = Math.max(_cnst.O_MKT_TIMING.CLOSE.MCX_MORNING, _cnst.O_MKT_TIMING.CLOSE.MCX_EVENING);
    }
    console.log("CLOSE MCX" + " = " + momentz(_cnst.O_MKT_TIMING.CLOSE['MCX']).tz(_cnst.TIME_ZONE).format(_cnst.DATE_TIME_FORMAT));
    return _cnst.O_MKT_TIMING.CLOSE;
}

//This method is tested & results are OK.
function isOpen(exchange, currentTime=0){

    if(currentTime === 0){
        currentTime = momentz().tz(_cnst.TIME_ZONE).valueOf();
    }


    if(_cnst.O_MKT_TIMING.OPEN[exchange] === 0 || !_cnst.O_MKT_TIMING.OPEN[exchange]){
        marketOpenTime (currentTime);
        marketCloseTime(currentTime);
    }

    let start = _cnst.O_MKT_TIMING.OPEN[exchange];
    let end   = _cnst.O_MKT_TIMING.CLOSE[exchange];

    if(currentTime >= start && currentTime <= end){
        return true;
    }else{
        if(currentTime >= end + 28800000){ //8 hours after market close
            console.log("It's been long, refreshing market open & close timing");
            marketOpenTime (currentTime);
            marketCloseTime(currentTime);    
        }
        return false;
    }
}

//This method is tested & results are OK.
function getNextSchedulingTime(exchange, currentTime=0){
    
    if(currentTime === 0){
        currentTime = momentz().tz(_cnst.TIME_ZONE).valueOf();
    }

    let open      = isOpen(exchange, currentTime);

    if(open){
        return 60;
    }else{
        let nextWorkingDay = _date_utils.getNextOpenTime(exchange, currentTime);
        let nextTime       = nextWorkingDay - currentTime;
        return nextTime > 60 ? Math.round(nextTime/1000) + getRandomTime(exchange) : 60;
    }

    function getRandomTime(exchange){
        //if MCX
        if(exchange === 'MCX'){
            return (Math.floor(Math.random() * 60));
        }else{
            return (Math.floor(Math.random() * 60));
        }
    }
}

//This method is tested & results are OK.
function squareOffTime(exchange, currentTime=0){
    
    if(currentTime === 0){
        currentTime = momentz().tz(_cnst.TIME_ZONE).valueOf();
    }

    let open      = isOpen(exchange, currentTime);

    if(open){
        
        let end   = _cnst.O_MKT_TIMING.CLOSE[exchange];
        let sqroffTime  = end - 10 * 60 * 60  - (getRandomTime(exchange)*(Math.floor(Math.random() * 5))); //~~ closing time  - 15 mins interval ~~
        let pendingTime = Math.round((sqroffTime - currentTime)/1000);
        return pendingTime < 0 ? 0 : pendingTime;

    }else{
        let nextWorkingDay = _date_utils.getNextOpenTime(exchange, currentTime);
        let nextTime       = nextWorkingDay - currentTime;
        return nextTime > 60 ? Math.round(nextTime/1000) + getRandomTime(exchange) : 60;
    }

    function getRandomTime(exchange){
        //if MCX
        if(exchange === 'MCX'){
            return (Math.floor(Math.random() * 60));
        }else{
            return (Math.floor(Math.random() * 60));
        }
    }
}

//This method is tested & results are OK.
function getTodaysOpenTime(exchange, currentTime=0){
    
    if(currentTime === 0){
        currentTime = momentz().tz(_cnst.TIME_ZONE).valueOf();
    }

    let open      = isOpen(exchange, currentTime);
    return _date_utils.getCurrentOpenTime(exchange, currentTime);
}


exports.getNextSchedulingTime   = getNextSchedulingTime;
exports.isOpen                  = isOpen;

exports.marketOpenTime  = marketOpenTime;
exports.marketCloseTime = marketCloseTime;
exports.squareOffTime   = squareOffTime;

exports.getTodayOpenTime = getTodaysOpenTime