From 48fb8c7d4c4b5b357b5a6652695526f200a26636 Mon Sep 17 00:00:00 2001
From: Hykilpikonna <admin@moecraft.cc>
Date: Sat, 5 Oct 2019 13:36:56 -0400
Subject: [PATCH] [O] Optimize unread count with caching

---
 src/pages/overall/overall-course/overall-course.ts | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/src/pages/overall/overall-course/overall-course.ts b/src/pages/overall/overall-course/overall-course.ts
index 45f14fd..e9833b2 100644
--- a/src/pages/overall/overall-course/overall-course.ts
+++ b/src/pages/overall/overall-course/overall-course.ts
@@ -10,11 +10,17 @@ export default class OverallCourse extends Vue
     // @ts-ignore
     @Prop({required: true}) course: Course;
 
+    private unread: number = -1;
+
     /**
-     * Count the number of unread assignments
+     * Count the number of unread assignments with cache
      */
     countUnread(): number
     {
-        return this.course.assignments.filter(a => a.unread).length;
+        if (this.unread == -1)
+        {
+            return this.unread = this.course.assignments.filter(a => a.unread).length;
+        }
+        else return this.unread;
     }
 }