Refactor Study Desk application structure

src/app/api/classes/route.ts

@@ -1,20 +1,23 @@
 import { NextRequest, NextResponse } from "next/server";
 import * as classService from "@/services/classService";
+import { classCreateSchema, isPrismaError } from "@/lib/validation/contentSchemas";
 
 export async function GET() {
-  const classes = await classService.listClasses();
-  return NextResponse.json(classes);
+  return NextResponse.json(await classService.listClasses());
 }
 
 export async function POST(request: NextRequest) {
-  const body = await request.json().catch(() => null);
-  if (!body?.name || typeof body.name !== "string" || !body.name.trim()) {
-    return NextResponse.json(
-      { error: "Class name is required" },
-      { status: 400 }
-    );
+  const parsed = classCreateSchema.safeParse(await request.json().catch(() => null));
+  if (!parsed.success) {
+    return NextResponse.json({ error: "Class name is required and must be 160 characters or fewer" }, { status: 400 });
+  }
+  try {
+    return NextResponse.json(await classService.createClass(parsed.data.name), { status: 201 });
+  } catch (error) {
+    if (isPrismaError(error, "P2002")) {
+      return NextResponse.json({ error: "A class with that slug already exists" }, { status: 409 });
+    }
+    console.error("Failed to create class", error);
+    return NextResponse.json({ error: "Failed to create class" }, { status: 500 });
   }
-
-  const newClass = await classService.createClass(body.name.trim());
-  return NextResponse.json(newClass, { status: 201 });
 }