isFridayFiveOClock.js

import moment from 'moment-timezone';

const isFridayFiveOClock = () => {
    const curtime = moment().tz('Europe/Amsterdam');
    const nextFriday = moment().tz('Europe/Amsterdam').day(5).hour(17).minute(0).seconds(0);

    if (moment().format('d') >= 5) {
        nextFriday.add(1, 'week');
    }

    if (curtime.format('d') === 5) {
        if (curtime.format('H') >= 17) {
            return ':clock5: => :beers:';
        } else {
            return `:no_entry_sign::beer: Almost there, 17:00 is ${curtime.to(nextFriday)}`;
        }
    } else {
        return `Have patience, Friday is ${curtime.to(nextFriday)}`;
    }
};

export default isFridayFiveOClock;