display correct subscription status

src/apis/student.ts

@@ -33,7 +33,7 @@ export function getUsers(): Promise<User[]> {
         user.firstname,
         user.email,
         user.student_number,
-        true,
+        validateSubscriptionDate(user.date_subscription),
         user.picture
       ));
       resolve(usersArray);
@@ -42,4 +42,12 @@ export function getUsers(): Promise<User[]> {
       reject(error);
     });
   });
+}
+
+function validateSubscriptionDate(dateStr: string): boolean {
+  const YEAR_IN_MS = 31536000000;
+  const date = Date.parse(dateStr) ?? Date.parse('01 Jan 1970 00:00:00 GMT');
+  const now = Date.now();
+  // Valid subscription if it was made less than a year ago
+  return (now - date) < YEAR_IN_MS;
 }
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