Adding days to a date excluding weekends in Shopify - shopify

Question

I'm trying to write some code to estimate a shipping date in Shopify. I've been learning liquid but am having trouble writing some logic in Ruby. I'm not sure if Shopify templates use Ruby or Ruby on Rails.
I want to get todays date and add either 3 or 5 days based on a input variable, excusing weekends. Heres how I'd do it in PHP:
$orderDate = date('Y-m-d');
$personalized = true;
$orderDays = ($personalized ? 4 : 2);
(date('H') > 12 ? $orderDays++ : $false);
$d = new DateTime( $orderDate );
$t = $d->getTimestamp();
// loop for X days
for($i=0; $i<$orderDays; $i++){
// add 1 day to timestamp
$addDay = 86400;
// get what day it is next day
$nextDay = date('w', ($t+$addDay));
// if it's Saturday or Sunday get $i-1
if($nextDay == 0 || $nextDay == 6) {
$i--;
}
// modify timestamp, add 1 day
$t = $t+$addDay;
}
$d->setTimestamp($t);
echo $d->format( 'Y-m-d' ). "\n";
Whats the best way to write this for Shopify liquid?

Answer 1

Use the date filter in Liquid.
The date format you are using in Ruby is equivalent to:
{{ "now" | date: "%Y, %m, %-d" }}
A day is 86400 seconds. Example to add 3 days from now and format:
{% assign days = 3 | times: 86400 %}
{{ "now" | date: "%s" | plus: days | date: "%Y, %m, %-d" }}
Note: You need the date: "%s" filter applied first to "now" for Liquid to understand that you are using the current timestamp and not the string "now".
A way to check if an order is made on a weekend would be:
{% assign wday = order.created_at | date: "%a" %}
{% if wday == 'Sat' or wday == 'Sun' %}
el Weekendo
{% endif %}