api/virtualLottery.js

@@ -74,6 +74,8 @@ router.route("/winner").get(mustBeAuthenticated, async (req, res) => {
     }
   }
 
+  ballotColors = shuffle(ballotColors);
+
   let colorToChoseFrom =
     ballotColors[Math.floor(Math.random() * ballotColors.length)];
   let findObject = {};
@@ -93,6 +95,8 @@ router.route("/winner").get(mustBeAuthenticated, async (req, res) => {
     }
   }
 
+  attendeeListDemocratic = shuffle(attendeeListDemocratic);
+
   let winner =
     attendeeListDemocratic[
       Math.floor(Math.random() * attendeeListDemocratic.length)
@@ -182,6 +186,26 @@ router.route("/attendee").post(mustBeAuthenticated, async (req, res) => {
   res.send(true);
 });
 
+function shuffle(array) {
+  let currentIndex = array.length,
+    temporaryValue,
+    randomIndex;
+
+  // While there remain elements to shuffle...
+  while (0 !== currentIndex) {
+    // Pick a remaining element...
+    randomIndex = Math.floor(Math.random() * currentIndex);
+    currentIndex -= 1;
+
+    // And swap it with the current element.
+    temporaryValue = array[currentIndex];
+    array[currentIndex] = array[randomIndex];
+    array[randomIndex] = temporaryValue;
+  }
+
+  return array;
+}
+
 module.exports = function(_io) {
   io = _io;
   return router;