CLASSROOMIO-T-216: Fix loading course multiple times

src/lib/components/CourseContainer/index.svelte

@@ -20,14 +20,17 @@
 
   async function onCourseIdChange(courseId = '') {
     console.log('courseid changed', courseId);
-    if (!courseId || prevCourseId === courseId || !browser) return;
+    if (!courseId || prevCourseId === courseId || !browser || $course.id === courseId) return;
+
     console.log('making request', courseId);
     isFetching = true;
     course.set(defaultCourse);
 
     const { data: _data } = await fetchCourse(courseId);
 
-    setCourse(_data);
+    if (_data) {
+      setCourse(_data);
+    }
 
     isFetching = false;
     prevCourseId = courseId;

src/lib/components/CourseLandingPage/index.svelte

@@ -45,8 +45,6 @@
   // initialize the expandDescription array with 'false' values for each review.
   let expandDescription = Array(reviews.length).fill(false);
 
-  // const paystackApi = paystack('');
-
   let activeNav = NAV_ITEMS[0].key;
   let instructor = {};
   let video: string | undefined;