Randomize deck ordering

1 files changed, 21 insertions, 0 deletions

diff --git a/script.js b/script.js
index d7f3890..a0ee7c7 100644
--- a/script.js
+++ b/script.js
@@ -281,6 +281,26 @@ function checkCards(cards) {
   }
 }
 
+function shuffleArray(array) {
+  let currentIndex = array.length;
+  let randomIndex;
+
+  // While there remain elements to shuffle.
+  while (currentIndex !== 0) {
+    // Pick a remaining element.
+    randomIndex = Math.floor(Math.random() * currentIndex);
+    currentIndex--;
+
+    // And swap it with the current element.
+    [array[currentIndex], array[randomIndex]] = [
+      array[randomIndex],
+      array[currentIndex],
+    ];
+  }
+
+  return array;
+}
+
 function loadCards(data) {
   checkCards(data);
 
@@ -311,6 +331,7 @@ function loadCards(data) {
   window.cards = data.filter((card) => {
     return (new Date(card.scheduled)) <= today;
   });
+  shuffleArray(window.cards);
 
   loadCard(window.cards[0]);