feat(auth): add requireAuth middleware

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

src/web/middleware/requireAuth.test.ts

@@ -0,0 +1,56 @@
+import { describe, it, expect, beforeEach, afterEach } from "vitest";
+import express from "express";
+import cookieParser from "cookie-parser";
+import request from "supertest";
+import { createDatabase, type BotDatabase } from "../../data/database.js";
+import { createUserStore } from "../../data/users.js";
+import { createSessionStore } from "../../data/sessions.js";
+import { createRequireAuth } from "./requireAuth.js";
+import { SESSION_COOKIE_NAME } from "../auth/validateSession.js";
+
+describe("requireAuth middleware", () => {
+  let botDb: BotDatabase;
+  let app: express.Express;
+  let validToken: string;
+
+  beforeEach(async () => {
+    botDb = createDatabase(":memory:");
+    const users = createUserStore(botDb.db);
+    const sessions = createSessionStore(botDb.db);
+    const u = await users.createUser("alice", "pw");
+    validToken = sessions.createSession(u.id).token;
+
+    app = express();
+    app.use(cookieParser());
+    app.use(createRequireAuth(sessions));
+    app.get("/protected", (req, res) => {
+      res.json({ ok: true, user: (req as any).user });
+    });
+  });
+
+  afterEach(() => {
+    botDb.close();
+  });
+
+  it("rejects requests without a session cookie", async () => {
+    const res = await request(app).get("/protected");
+    expect(res.status).toBe(401);
+    expect(res.body).toEqual({ error: "unauthenticated" });
+  });
+
+  it("rejects requests with an unknown session cookie", async () => {
+    const res = await request(app)
+      .get("/protected")
+      .set("Cookie", `${SESSION_COOKIE_NAME}=garbage`);
+    expect(res.status).toBe(401);
+  });
+
+  it("allows requests with a valid session cookie and attaches req.user", async () => {
+    const res = await request(app)
+      .get("/protected")
+      .set("Cookie", `${SESSION_COOKIE_NAME}=${validToken}`);
+    expect(res.status).toBe(200);
+    expect(res.body.ok).toBe(true);
+    expect(res.body.user.username).toBe("alice");
+  });
+});