v1.1.0: session guard on all game routes + register + sign-in screen (ISS-107)

app/api/register/route.ts

@@ -0,0 +1,71 @@
+import { randomUUID } from 'node:crypto';
+import * as schema from '@/lib/db/schema';
+import { getGameDb, persist } from '@/lib/db/client';
+import { createSession, hashPassword } from '@/lib/auth';
+import { STARTING_CASH, STARTING_REPUTATION } from '@/lib/game/seed';
+
+// v1.1.0 (ISS-107) — POST /api/register
+//   body { username: string, password: string } (both required; unknown fields 400).
+//   Username: 3–20 chars of [a-z0-9_-], case-insensitive input stored lowercase → else 400.
+//   Password: min 8 chars → else 400. Creates the users row (scrypt via hashPassword — same
+//   digest shape verifyPassword() checks) AND a players row with the starter economy (the exact
+//   values seedEmpty() gives a fresh world). 409 when the username is taken. On success mints a
+//   session immediately and returns { sessionId, user } like /api/login — no second round-trip.
+
+const USERNAME_RE = /^[a-z0-9_-]{3,20}$/;
+
+export async function POST(req: Request) {
+  let body: unknown;
+  try {
+    const text = await req.text();
+    body = text ? JSON.parse(text) : undefined;
+  } catch {
+    return Response.json({ error: 'invalid JSON body' }, { status: 400 });
+  }
+  if (typeof body !== 'object' || body === null || Array.isArray(body)) {
+    return Response.json({ error: 'body must be a JSON object' }, { status: 400 });
+  }
+  const input = body as Record<string, unknown>;
+  for (const key of Object.keys(input)) {
+    if (key !== 'username' && key !== 'password') {
+      return Response.json({ error: `unknown field "${key}"` }, { status: 400 });
+    }
+  }
+  const username = typeof input.username === 'string' ? input.username.toLowerCase() : '';
+  if (!USERNAME_RE.test(username)) {
+    return Response.json(
+      { error: 'username must be 3–20 characters of a-z, 0-9, _ or -' },
+      { status: 400 },
+    );
+  }
+  const password = input.password;
+  if (typeof password !== 'string' || password.length < 8) {
+    return Response.json({ error: 'password must be at least 8 characters' }, { status: 400 });
+  }
+
+  const inst = await getGameDb();
+  const taken = inst.raw.exec('SELECT 1 FROM users WHERE username = ?', [username]);
+  if (taken[0]?.values?.length) {
+    return Response.json({ error: 'username is already taken' }, { status: 409 });
+  }
+
+  // One UUID for both rows — the account and its player share an id; requireAuth still joins on username.
+  const id = randomUUID();
+  inst.raw.run('INSERT INTO users (id, username, password_hash, admin, created_at) VALUES (?, ?, ?, 0, ?)', [
+    id,
+    username,
+    hashPassword(password),
+    Date.now(),
+  ]);
+  await inst.db.insert(schema.players).values({
+    id,
+    provider: 'local',
+    username,
+    cash: STARTING_CASH,
+    reputation: STARTING_REPUTATION,
+  });
+  await persist(inst);
+
+  const sessionId = await createSession(inst, id);
+  return Response.json({ sessionId, user: { username, admin: false } });
+}