feat: move network topology into a first-party plugin

src/backend/tests/plugins/network-topology/routes.test.ts

@@ -0,0 +1,152 @@
+import { describe, it, expect, vi, beforeEach } from "vitest";
+import type { Request, Response, Router } from "express";
+
+const state = vi.hoisted(() => ({
+  currentUserId: "user-1" as string | undefined,
+  records: new Map<string, { userId: string; topology: string | null }>(),
+}));
+
+vi.mock("../../../database/db/index.js", () => ({ db: {} }));
+
+vi.mock("../../../utils/logger.js", () => ({
+  databaseLogger: {
+    error: vi.fn(),
+    warn: vi.fn(),
+    info: vi.fn(),
+    success: vi.fn(),
+  },
+}));
+
+vi.mock("../../../utils/auth-manager.js", () => ({
+  AuthManager: {
+    getInstance: () => ({
+      createAuthMiddleware:
+        () =>
+        (req: Record<string, unknown>, _res: unknown, next: () => void) => {
+          req.userId = state.currentUserId;
+          next();
+        },
+    }),
+  },
+}));
+
+vi.mock("../../../database/repositories/factory.js", () => ({
+  createCurrentNetworkTopologyRepository: () => ({
+    findByUserId: async (userId: string) => state.records.get(userId) ?? null,
+    upsertForUser: async (userId: string, topology: string) => {
+      state.records.set(userId, { userId, topology });
+    },
+  }),
+}));
+
+vi.mock("../../../database/routes/network-topology-dispatch.js", () => ({
+  registerNetworkTopologyRouter: vi.fn(),
+  unregisterNetworkTopologyRouter: vi.fn(),
+}));
+
+const { router } =
+  await import("../../../../../plugins/network-topology/backend/routes.js");
+
+function findLayer(method: string, path: string) {
+  const stack = (router as unknown as Router).stack as Array<{
+    route?: {
+      path: string;
+      methods: Record<string, boolean>;
+      stack: Array<{ handle: (req: Request, res: Response) => unknown }>;
+    };
+  }>;
+  const layer = stack.find(
+    (l) => l.route?.path === path && l.route?.methods[method],
+  );
+  if (!layer?.route) throw new Error(`No route for ${method} ${path}`);
+  return layer.route.stack[layer.route.stack.length - 1].handle;
+}
+
+function makeReqRes(overrides: { body?: Record<string, unknown> }) {
+  const req = {
+    userId: state.currentUserId,
+    body: overrides.body ?? {},
+    headers: {},
+  } as unknown as Request;
+
+  const res = {
+    statusCode: 200,
+    jsonBody: null as unknown,
+    status(code: number) {
+      (this as unknown as { statusCode: number }).statusCode = code;
+      return this;
+    },
+    json(payload: unknown) {
+      (this as unknown as { jsonBody: unknown }).jsonBody = payload;
+      return this;
+    },
+  } as unknown as Response & { statusCode: number; jsonBody: unknown };
+
+  return { req, res };
+}
+
+async function invoke(
+  method: string,
+  path: string,
+  overrides: { body?: Record<string, unknown> } = {},
+) {
+  const handler = findLayer(method, path);
+  const { req, res } = makeReqRes(overrides);
+  await handler(req, res);
+  return res as unknown as {
+    statusCode: number;
+    jsonBody: Record<string, unknown> | null;
+  };
+}
+
+beforeEach(() => {
+  state.currentUserId = "user-1";
+  state.records = new Map();
+});
+
+describe("GET /network-topology", () => {
+  it("returns null when the user has no saved topology", async () => {
+    const res = await invoke("get", "/");
+    expect(res.jsonBody).toBeNull();
+  });
+
+  it("returns the parsed topology when one exists", async () => {
+    state.records.set("user-1", {
+      userId: "user-1",
+      topology: JSON.stringify({ nodes: [{ id: "host-1" }], edges: [] }),
+    });
+
+    const res = await invoke("get", "/");
+    expect(res.jsonBody).toEqual({ nodes: [{ id: "host-1" }], edges: [] });
+  });
+
+  it("rejects an unauthenticated request", async () => {
+    state.currentUserId = undefined;
+    const res = await invoke("get", "/");
+    expect(res.statusCode).toBe(401);
+  });
+});
+
+describe("POST /network-topology", () => {
+  it("saves the topology and returns success", async () => {
+    const res = await invoke("post", "/", {
+      body: { topology: { nodes: [], edges: [] } },
+    });
+
+    expect(res.jsonBody).toEqual({ success: true });
+    expect(state.records.get("user-1")?.topology).toBe(
+      JSON.stringify({ nodes: [], edges: [] }),
+    );
+  });
+
+  it("rejects a request with no topology", async () => {
+    const res = await invoke("post", "/", { body: {} });
+    expect(res.statusCode).toBe(400);
+  });
+
+  it("rejects an unauthenticated request", async () => {
+    state.currentUserId = undefined;
+    const res = await invoke("post", "/", { body: { topology: {} } });
+    expect(res.statusCode).toBe(401);
+  });
+});