Lecture Import: Sort by date, closes #68

src/pages/internal/import.tsx

@@ -55,14 +55,23 @@ function TerminBody({
         return (event: ICalEvent) => !nCi(event);
     };
 
+    const sortEvents = (a: ICalEvent, b: ICalEvent) => {
+        if (a.startDate === undefined || b.startDate === undefined) {
+            return 0;
+        }
+        return a.startDate.toMillis() - b.startDate.toMillis();
+    };
+
     // find events that are new (place, duration and time unique)
     const new_events = imported_events.current
         .filter(notContainedIn(existingEvents))
-        .filter(removeDuplicates);
+        .filter(removeDuplicates)
+        .sort(sortEvents);
     // find existing events that are not in the imported events
     const not_imported_events = existingEvents
         .filter(notContainedIn(imported_events.current))
-        .filter(removeDuplicates);
+        .filter(removeDuplicates)
+        .sort(sortEvents);
     // events that are in both
     const full_matches = imported_events.current
         .filter(containedIn(existingEvents))