multiple schedule suppport kinda

src/shared/types/Course.ts

@@ -45,6 +45,9 @@ export class Course {
     courseName: string;
     /** The unique identifier for which department that a course belongs to, i.e. CS, MAL, etc. */
     department: string;
+
+    /** The number of credits that a course is worth */
+    creditHours: number;
     /** Is the course open, closed, waitlisted, or cancelled? */
     status: Status;
     /** all the people that are teaching this course, and some metadata about their names */

src/shared/types/UserSchedule.ts

@@ -0,0 +1,35 @@
+import { Serialized } from 'chrome-extension-toolkit';
+import { Course } from './Course';
+
+/**
+ * Represents a user's schedule that is stored in the extension
+ */
+export class UserSchedule {
+    courses: Course[];
+    id: string;
+    name: string;
+
+    constructor(schedule: Serialized<UserSchedule>) {
+        this.courses = schedule.courses.map(c => new Course(c));
+        this.id = schedule.id;
+        this.name = schedule.name;
+    }
+
+    containsCourse(course: Course): boolean {
+        return this.courses.some(c => c.uniqueId === course.uniqueId);
+    }
+
+    getCreditHours(): number {
+        return this.courses.reduce((acc, course) => acc + course.creditHours, 0);
+    }
+
+    addCourse(course: Course): void {
+        if (!this.containsCourse(course)) {
+            this.courses.push(course);
+        }
+    }
+
+    removeCourse(course: Course): void {
+        this.courses = this.courses.filter(c => c.uniqueId !== course.uniqueId);
+    }
+}