From 2c074212f77f8f4fbafe5f21774c6a107394d0d4 Mon Sep 17 00:00:00 2001
From: taoky <me@taoky.moe>
Date: Thu, 12 Oct 2023 11:36:12 +0800
Subject: [PATCH] terms: add quiz question shuffling

---
 frontend/templates/terms.html | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/frontend/templates/terms.html b/frontend/templates/terms.html
index 76b180d..d2b8b80 100644
--- a/frontend/templates/terms.html
+++ b/frontend/templates/terms.html
@@ -62,6 +62,8 @@ <h1>{{ obj.name }}</h1>
                     return;
                 }
                 const quizs = JSON.parse(ele.textContent);
+                // comment out this if you don't want to shuffle the quizs.
+                this.inplace_shuffle(quizs.questions);
                 this.quizs = quizs;
             },
             check() {
@@ -75,6 +77,18 @@ <h1>{{ obj.name }}</h1>
                     }
                 }
                 this.enable_submit = true;
+            },
+            inplace_shuffle(array) {
+                // https://stackoverflow.com/a/2450976/8460426
+                let current_index = array.length;
+                let random_index;
+
+                while (current_index > 0) {
+                    random_index = Math.floor(Math.random() * current_index);
+                    current_index--;
+
+                    [array[current_index], array[random_index]] = [array[random_index], array[current_index]];
+                }
             }
         }
     });