#11: Adding method to calculate semester

scripts.js

@@ -83,6 +83,29 @@ let courseLinks = {
     'TINF20B5': {user: 'strand', file: 'TINF20B5'}
 }
 
+/**
+ * Calculates, in which semester the given course currently is
+ * @param course The course to calculate the semester for
+ * @returns {number} The number of the semester they are in
+ */
+function calculateSemester(course) {
+    let yearRegex = new RegExp('[a-zA-Z]*([0-9]{2})B[0-9]');
+
+    let match = yearRegex.exec(course);
+    let startYear = '20';
+    if (match !== null) {
+        startYear += match[1];
+    }
+
+    let currentYear = new Date().getFullYear();
+
+    let yearDifference = currentYear - startYear;
+
+    let semesters = yearDifference * 2 + 1;
+
+    return semesters;
+}
+
 /* Toggle Dark-Mode */
 
 const toggleDarkMode = () => {