Refactor Study Desk application structure

src/app/api/quizzes/reorder/route.ts

@@ -1,32 +1,29 @@
 import { NextRequest, NextResponse } from "next/server";
-import { prisma } from "@/lib/db";
 import { reorderRequestSchema } from "@/lib/validation/reorderSchemas";
+import {
+  ReorderConflictError,
+  ReorderValidationError,
+  reorderContent,
+} from "@/services/reorderService";
 
 export async function PATCH(request: NextRequest) {
+  const parsed = reorderRequestSchema.safeParse(
+    await request.json().catch(() => null)
+  );
+  if (!parsed.success) {
+    return NextResponse.json({ error: "Invalid reorder input" }, { status: 400 });
+  }
   try {
-    const parsed = reorderRequestSchema.safeParse(await request.json());
-    if (!parsed.success) {
-      return NextResponse.json({ error: "Invalid input" }, { status: 400 });
-    }
-
-    const { items } = parsed.data;
-
-    // items should be an array of { id, sortOrder, groupId }
-    // Using a transaction to perform all updates
-    await prisma.$transaction(
-      items.map((item) =>
-        prisma.quizSet.update({
-          where: { id: item.id },
-          data: {
-            sortOrder: item.sortOrder,
-            groupId: item.groupId,
-          },
-        })
-      )
-    );
-
+    await reorderContent("QUIZ", parsed.data);
     return NextResponse.json({ success: true });
   } catch (error) {
+    if (error instanceof ReorderValidationError) {
+      return NextResponse.json({ error: error.message }, { status: 400 });
+    }
+    if (error instanceof ReorderConflictError) {
+      return NextResponse.json({ error: error.message }, { status: 409 });
+    }
+    console.error("Failed to reorder quizzes", error);
     return NextResponse.json({ error: "Failed to reorder quizzes" }, { status: 500 });
   }
 }