Import source: vault/app/api/auth/register/route

Import the existing local project snapshot. This commit organizes existing files; it does not represent newly developed functionality.

vault/app/api/auth/register/route.ts

@@ -0,0 +1,51 @@
+import { NextResponse } from "next/server";
+import { randomUUID } from "crypto";
+import { hashPassword } from "@/lib/server-password";
+import { createSession, verifyCaptcha } from "@/lib/server-security";
+import { normalizeUsername, writeDb } from "@/lib/server-db";
+import { jsonError, readJsonBody } from "@/lib/server-api";
+import { isRateLimited } from "@/lib/server-rate-limit";
+
+export async function POST(request: Request) {
+  if (await isRateLimited(request, "register", 5, 60_000)) {
+    return jsonError("Too many attempts. Try again shortly.", 429);
+  }
+
+  const body = await readJsonBody(request);
+  const name = typeof body.name === "string" ? body.name.trim() : "";
+  const username = typeof body.username === "string" ? normalizeUsername(body.username) : "";
+  const password = typeof body.password === "string" ? body.password : "";
+  const captcha = typeof body.captcha === "string" ? body.captcha : "";
+
+  if (!name) return jsonError("Name is required", 400);
+  if (username.length < 3) return jsonError("Username must be at least 3 characters", 400);
+  if (password.length < 8) return jsonError("Password must be at least 8 characters", 400);
+  if (!(await verifyCaptcha(captcha))) return jsonError("Captcha answer is incorrect", 400);
+
+  const now = new Date().toISOString();
+  const user = {
+    id: randomUUID(),
+    username,
+    name,
+    passwordHash: hashPassword(password),
+    createdAt: now,
+  };
+
+  let duplicate = false;
+  await writeDb((db) => {
+    duplicate = db.users.some((candidate) => candidate.username === username);
+    if (!duplicate) db.users.push(user);
+  });
+
+  if (duplicate) return jsonError("That username is already taken", 409);
+
+  await createSession(user.id);
+  return NextResponse.json({
+    user: {
+      id: user.id,
+      username: user.username,
+      name: user.name,
+      createdAt: user.createdAt,
+    },
+  }, { status: 201 });
+}