From e0e7b55d99445a8b1abe57d3c88d7cac9b82790b Mon Sep 17 00:00:00 2001
From: Nick Stokoe <git.wu-lee@noodlefactory.co.uk>
Date: Sat, 31 Dec 2022 10:32:19 +0000
Subject: [PATCH] www/countdown.js - allow mocking the current time

---
 www/countdown.js | 15 ++++++++++++---
 1 file changed, 12 insertions(+), 3 deletions(-)

diff --git a/www/countdown.js b/www/countdown.js
index 0ecf120..3d1c5e0 100644
--- a/www/countdown.js
+++ b/www/countdown.js
@@ -1,8 +1,8 @@
 // This is deliberately browser-compatible JS, so we avoid fat arrows etc.
 
 var locale = "EN-GB";
-var now = new Date();
-var nextNewYearUTC = new Date(Date.UTC(now.getFullYear()+1, 0, 1));
+var now = getTimeNow();
+var nextNewYearUTC = new Date(Date.UTC(getTimeNow().getFullYear()+1, 0, 1));
 var secsRemaining = 0;
 var nextZone;
 var counter = document.getElementById("counter");
@@ -12,6 +12,15 @@ var untilDate = document.getElementById("until-date");
 
 var countDownSound = new Audio('get-ready.ogg');
 
+// This function returns the current time - or we can adjust it to a
+// fake time, if we're testing!
+function getTimeNow() {
+  var now = new Date();
+  var offset = 0; // hours
+  
+  return new Date(now.valueOf() + offset*3600000);
+}
+
 // Convert the next new year time to 'date, hours:mins:secs' in the target timezone
 function zoneTime(zone, refTime) {
   return refTime.toLocaleString('EN-US', {
@@ -291,7 +300,7 @@ function handleTick(now) {
 }
 
 function ticker() {
-  var now = new Date();
+  var now = getTimeNow();
   handleTick(now);
 
   var millis = now.getMilliseconds()