Refactor Study Desk application structure

src/app/api/quizzes/route.ts

@@ -1,35 +1,43 @@
 import { NextRequest, NextResponse } from "next/server";
 import * as quizService from "@/services/quizService";
-import { quizImportSchema } from "@/lib/validation/importSchemas";
+import { quizImportRequestSchema } from "@/lib/validation/importSchemas";
+import { readLimitedJson, RequestTooLargeError } from "@/lib/limitedJson";
 
 export async function POST(request: NextRequest) {
-  const body = await request.json().catch(() => null);
-
-  if (!body) {
-    return NextResponse.json({ error: "Invalid request body" }, { status: 400 });
+  let body: unknown;
+  try {
+    body = await readLimitedJson(request);
+  } catch (error) {
+    if (error instanceof RequestTooLargeError) {
+      return NextResponse.json({ error: error.message }, { status: 413 });
+    }
+    throw error;
   }
 
-  const { classId, data, name, groupId } = body;
-
-  if (!classId || typeof classId !== "string") {
-    return NextResponse.json({ error: "classId is required" }, { status: 400 });
-  }
-
-  // Server-side validation
-  const parsed = quizImportSchema.safeParse(data);
+  const parsed = quizImportRequestSchema.safeParse(body);
   if (!parsed.success) {
     return NextResponse.json(
-      { error: "Validation failed", details: parsed.error.issues },
+      {
+        error: "Invalid quiz import. SATA questions need at least two correct options.",
+        details: parsed.error.issues,
+      },
       { status: 400 }
     );
   }
 
-  const quizSet = await quizService.createQuizSetFromImport(
-    classId,
-    parsed.data,
-    name?.trim() || undefined,
-    groupId || null
-  );
-
-  return NextResponse.json(quizSet, { status: 201 });
+  try {
+    const quiz = await quizService.createQuizSetFromImport(
+      parsed.data.classId,
+      parsed.data.data,
+      parsed.data.name,
+      parsed.data.groupId ?? null
+    );
+    return NextResponse.json(quiz, { status: 201 });
+  } catch (error) {
+    if (error instanceof quizService.QuizContentValidationError) {
+      return NextResponse.json({ error: error.message }, { status: error.status });
+    }
+    console.error("Failed to create quiz", error);
+    return NextResponse.json({ error: "Failed to create quiz" }, { status: 500 });
+  }
 }