added api routes , added zod validation for titel

which should contain atleast 1 string

src/app/api/notes/route.ts

@@ -0,0 +1,37 @@
+import prisma from "@/lib/db/prisma";
+import { createNoteSchema } from "@/lib/validation/note";
+import { auth } from "@clerk/nextjs";
+
+export async function POST(req: Request) {
+  try {
+    const body = await req.json();
+
+    const parseResult = createNoteSchema.safeParse(body);
+
+    if (!parseResult.success) {
+      console.error(parseResult.error);
+      return Response.json({ error: "Invalid input" }, { status: 400 });
+    }
+
+    const { title, content } = parseResult.data;
+
+    const { userId } = auth();
+
+    if (!userId) {
+      return Response.json({ error: "Unauthorized" }, { status: 401 });
+    }
+
+    const note = await prisma.note.create({
+      data: {
+        title,
+        content,
+        userId,
+      },
+    });
+
+    return Response.json({ note }, { status: 201 });
+  } catch (error) {
+    console.error(error);
+    return Response.json({ error: "Internal server error" }, { status: 500 });
+  }
+}

src/lib/validation/note.ts

@@ -0,0 +1,8 @@
+import { z } from "zod";
+
+export const createNoteSchema = z.object({
+  title: z.string().min(1, { message: "Title is required" }),
+  content: z.string().optional(),
+});
+
+export type CreateNoteSchema = z.infer<typeof createNoteSchema>;