Final push before system formatting

AppDev/ikt205_2026_18_study_sprint/source/lib/progress.ts

@@ -0,0 +1,15 @@
+import { supabase } from '@/lib/supabase';
+
+export async function CheckAssignmentCompletion(aId: string) {
+  const { data, error } = await supabase.from("tasks").select("tId, isCompleted").eq("aId", aId);
+
+  if (error) throw error;
+
+  const tasks = data ?? [];
+
+  const allCompleted = tasks.length > 0 && tasks.every((task) => task.isCompleted === true);
+
+  const { error: updateError } = await supabase.from("assignments").update({ isCompleted: allCompleted, lastChanged: new Date().toISOString()}).eq("aId", aId);
+
+  if (updateError) throw updateError;
+}