untitled

example.js

import moment from 'moment-timezone';
import verifyVisitationTime from './verifyVisitationTime';
const visitationTime = moment("2019-01-07T11:00:00-06:00"); // now, for the local timezone.  But you can change that with now.tz('Asia/Tokyo');
const visitationTimef = visitationTime.format();

const deliveryTime = moment("2019-01-07T15:00:00-06:00");
const deliveryTimef = deliveryTime.format();

const verified = verifyVisitationTime(deliveryTime, visitationTime); // true because more than three hours difference

const slowDeliveryTime = verifyVisitationTime(deliveryTime, visitationTime, 10); // false because less than 10 hours difference

toHours.js

export const msPerSec = 1000;
export const secPerMin = 60;
export const minPerHour = 60;

export const toHours = (ms) => ms / msPerSec / secPerMin / minPerHour;
export default toHours;

untitled.carbide.md

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verifyVisitationTime.js

import moment from 'moment-timezone';
import msToHours from './toHours';

export const verifyVisitationTime = ( deliveryTime, visitationTime, minBusinessHrsForDelivery = 3 ) => {

    const formatted = deliveryTime.format();


    const diff = deliveryTime - visitationTime;
    const hours = msToHours(diff);
    console.log(`hours: ${hours}`);
    
    const verified = hours >= minBusinessHrsForDelivery;
    
    return verified;
};

export default verifyVisitationTime;