transit_days.js

// A loose, sloppy way to estimate
// dateObject.getEstimatedArrivalDate(integer shippingTransitDays)


/** Devin's JS for Estimating Arrival Times - don't touch! 1/21/21 **/
// Configure Shipping Cutoff Times (in user's local time?)
configShippingCutOffHour = 17;
configTransitDaysFreeShipping = 3;
configTransitDaysFastShipping = 1;

// Appends ordinal suffix to integer d, ie 3 => "3rd"
nth = function(d) {
  if (d > 3 && d < 21) return 'th';
  switch (d % 10) {
    case 1:  return "st";
    case 2:  return "nd";
    case 3:  return "rd";
    default: return "th";
  }
}

/** Devin's JS for Estimating Arrival Times - don't touch! 1/21/21 **/

// Returns pretty date (ie "Friday, Jan 12")
Date.prototype.getArrivalDateString = function(){
  return this.toLocaleString('en-us', {weekday:'short'}) + ", " + this.toLocaleString('en-us', {month:'short'}) + " " + this.getDate() + nth(this.getDate());
}

Date.prototype.getShippingCutOffHour = function(){ return this.shippingCutOffHour || 12; }
Date.prototype.setShippingCutOffHour = function(h){ this.shippingCutOffHour = h; }
Date.prototype.isBeforeShippingCutOff = function(){
  return this.getShippingCutOffHour() > this.getHours();
}

// Used for Urgency
// returns {"hours": 12, "minutes": 13}
Date.prototype.getTimeUntilShippingCutOff = function(){
    if(!this.timeUntilShippingCutOff){
      var hShippingCutOffHour = this.getShippingCutOffHour();
      hShippingCutOffHour -= this.getMinutes() == 0 ? 0 : 1;
      var h = hShippingCutOffHour < this.getHours() ? 24 + hShippingCutOffHour - this.getHours() : hShippingCutOffHour - this.getHours();
      var m = this.getMinutes() == 0 ? 59 : 59 - this.getMinutes();
      this.timeUntilShippingCutOff = {hours: h, minutes: m};
    }
    return this.timeUntilShippingCutOff;
}

// Input: Integer, number of days carrier provides for SLA (ie "priority 2-day" => 2)
// Returns new Date object that can be manipulated to estimate arrival timinig info
Date.prototype.getEstimatedArrivalDate = function( shippingTransitDays ){
    var d = shippingTransitDays;
    var arrivalDate = new Date( this ); // copy date.

    // Calc days until the order leaves the FC
    var days_until_transit_start = 0;
    if(arrivalDate.getDay()>0 && arrivalDate.getDay()<4){
      days_until_transit_start = arrivalDate.isBeforeShippingCutOff() ? 0 : 1;
    } else if (arrivalDate.getDay() == 5 && arrivalDate.isBeforeShippingCutOff()){
        days_until_transit_start = 0;
    } else if (arrivalDate.getDay() == 5) {
      days_until_transit_start = 2;
    } else if (arrivalDate.getDay() == 6) {
      days_until_transit_start = 1;
    } else if (arrivalDate.getDay() == 0) {
      days_until_transit_start = 0;
    }

    arrivalDate.setDate(arrivalDate.getDate() + days_until_transit_start + shippingTransitDays );

    // Ensure that arrival date is not on a Sunday; change to Monday
    if(arrivalDate.getDay() == 0)
      arrivalDate.setDate(arrivalDate.getDate() + 1);

    return arrivalDate;
}


// dummy var, could be a form field input
//OrderDate = new Date();
//var deliveryDate = OrderDate.getEstimatedArrivalDate(3);
// expected output 2020-02-25
//console.log("Order date: %s, Delivery date: %s",OrderDate,deliveryDate );

var updateEstimatedArrivalTimes = function(){
  var today = new Date();

  var freeShipping = today.getEstimatedArrivalDate(configTransitDaysFreeShipping);
  var fastShipping = today.getEstimatedArrivalDate(configTransitDaysFastShipping);

  // update text for free shipping HTML elements
  for(var i = 0, r = document.getElementsByClassName('arrival-date-free-shipping'); !!r && i < r.length; i++)
    r[i].innerText = freeShipping.getArrivalDateString();

  // update text for fast shipping HTML elements
  for(var i = 0, fr = document.getElementsByClassName('arrival-date-fast-shipping'); !!fr && i < fr.length; i++)
      fr[i].innerText = fastShipping.getArrivalDateString();

  // update text for cut off time HTML elements
  var dbg;
  for(var i = 0, fr = document.getElementsByClassName('arrival-date-cutoff-time-remaining'); !!fr && i < fr.length; i++){
        var remaining = fastShipping.getTimeUntilShippingCutOff();
        fr[i].getElementsByClassName('hours')[0].innerHTML = remaining.hours;
        fr[i].getElementsByClassName('minutes')[0].innerHTML = remaining.minutes;

  }
}

updateEstimatedArrivalTimes();