3x-ui/frontend/README.md

# 3x-ui frontend

React 19 + Ant Design 6 + TypeScript + Vite 8. Three SPA bundles —
`index.html` (admin panel SPA, all `/panel/*` routes), `login.html`
(login + 2FA), and `subpage.html` (public subscription viewer). All
three are built into `../web/dist/` and embedded into the Go binary
via `embed.FS`.

State is split between local `useState`, TanStack Query for server
state, and `useTheme` / `useWebSocket` contexts. Form validation,
API parsing, and the xray config model all run through a single
shared Zod schema tree (see [Schemas](#schemas)).

## Dev

```sh
npm install
npm run dev
```

Vite serves on `http://localhost:5173/`. API calls and `/panel/*`
routes proxy to the Go panel at `http://localhost:2053/`, so start
the Go panel first (`go run main.go`) and then Vite. The proxy
auto-rewrites `/panel`, `/panel/settings`, `/panel/inbounds`,
`/panel/xray` to the matching Vite-served HTML, so the sidebar's
production-style links work without round-tripping through Go.

## Scripts

| Command | What |
|---|---|
| `npm run dev` | Vite dev server with API + WS proxy to Go |
| `npm run build` | Regenerates OpenAPI + Zod, then builds into `../web/dist/` |
| `npm run preview` | Serve the built bundle locally |
| `npm run typecheck` | `tsc --noEmit` (strict, no emit) |
| `npm run lint` | ESLint flat config (`@typescript-eslint` + `react-hooks`) |
| `npm run test` | Vitest single run (schema fixtures, link parsers, …) |
| `npm run test:watch` | Vitest watch mode |
| `npm run gen:api` | Build `public/openapi.json` from `pages/api-docs/endpoints.ts` |
| `npm run gen:zod` | Run the Go-side openapigen tool → `src/generated/{zod,types}.ts` |

CI runs `typecheck`, `lint`, `test`, and `build` on every PR
(see `../.github/workflows/ci.yml`).

### One-off: scan for deprecated APIs

Run this command to sweep the codebase for usages of APIs marked
with the JSDoc `@deprecated` tag (AntD prop renames, Zod renames,
removed Web APIs, etc.):

```sh
npx eslint --config eslint.deprecated.config.js src
```

It's a type-aware ESLint run against `eslint.deprecated.config.js`
and is not wired into `npm run lint` because typed linting triples
the wall-clock time.

## Production build

```sh
npm run build
```

Outputs to `../web/dist/` (HTML at the root, hashed JS/CSS under
`assets/`). `manualChunks` splits AntD, icons, codemirror, and
react-query into separate vendor bundles to keep the per-page
initial JS small. The Go binary embeds this directory at compile
time and `web/controller/dist.go` serves the per-page HTML.

## Layout

```
frontend/
├── index.html, login.html, subpage.html  # 3 Vite entries
├── tsconfig.json
├── eslint.config.js
├── eslint.deprecated.config.js           # On-demand type-aware lint config that flags
│                                         #   usages of APIs marked with JSDoc @deprecated
├── vitest.config.ts
├── vite.config.js
├── scripts/
│   └── build-openapi.mjs                 # endpoints.ts → openapi.json
└── src/
    ├── entries/         # Per-page bootstrap (createRoot + render)
    ├── main.tsx         # Shared root for the admin SPA (index.html)
    ├── routes.tsx       # react-router routes mounted under /panel/
    ├── pages/           # One folder per route, page component + helpers
    │   ├── index/, login/, inbounds/, clients/, xray/, nodes/,
    │   ├── settings/, api-docs/, sub/
    ├── layouts/         # AdminLayout (sidebar + header + outlet)
    ├── components/      # Cross-page React components
    ├── hooks/           # useClients, useTheme, useWebSocket, …
    ├── api/             # Axios + CSRF interceptor, TanStack Query bridge,
    │                    #   WebSocket client + queryClient.ts
    ├── i18n/            # react-i18next init (locales in web/translation/)
    ├── lib/xray/        # Pure functions: link generation, defaults,
    │                    #   form ⇄ wire adapters, protocol capabilities
    ├── schemas/         # Zod source-of-truth (see "Schemas" below)
    ├── generated/       # Code-generated zod + ts types from Go
    │                    #   (DO NOT hand-edit — regenerated by gen:zod)
    ├── models/          # Thin legacy types still in transit
    │                    #   (DBInbound, Status, AllSetting, reality-targets)
    ├── styles/          # Shared CSS modules
    ├── test/            # Vitest specs + golden fixtures
    │   ├── *.test.ts
    │   ├── __snapshots__/
    │   └── golden/fixtures/  # Per-(protocol × network × security) JSON
    └── utils/           # HttpUtil, ClipboardManager, SizeFormatter, …
```

## Schemas

`src/schemas/` is the single source of truth for the xray
configuration model. Every API response is parsed through it,
every form field is validated against it, and TypeScript types
are inferred via `z.infer<typeof X>` — never hand-written.

```
schemas/
├── primitives/      # Atomic reusable schemas (port, protocol, sniffing, …)
├── api/             # Backend response shapes (e.g. SlimInboundSchema)
├── forms/           # User-facing form shapes (narrower than api/)
├── protocols/
│   ├── inbound/     # Per-protocol settings (vmess, vless, trojan, …)
│   ├── outbound/
│   ├── stream/      # Network transports (tcp, ws, grpc, xhttp, kcp, …)
│   └── security/    # TLS, Reality, none
├── client.ts, dns.ts, routing.ts, setting.ts, status.ts, xray.ts
└── _envelope.ts     # Generic `Msg<T>` envelope wrapper
```

Patterns:

- **Discriminated unions** for polymorphic data — inbound `settings`
  is `z.discriminatedUnion('protocol', […])`, same for stream and
  security.
- **Three validation layers**, non-overlapping:
  - API boundary: `parseMsg(msg, schema, ctx)` inside TanStack
    Query `queryFn` — warn-only in prod, throws in dev
  - Form input: `antdRule(schema.shape.field)` on every `<Form.Item>` —
    blocks submit + per-field inline error
  - Wire request: `Schema.parse(payload)` inside `mutationFn` — throws,
    because a malformed payload here is always a developer bug
- **No `.loose()` or `[key: string]: any`** in production schemas.
  `@typescript-eslint/no-explicit-any: error` is enforced.

## Form pattern (Pattern A)

All non-trivial modals use this single pattern:

```tsx
const [form] = Form.useForm<InboundFormValues>();

const onFinish = async () => {
  const values = await form.validateFields();
  await createInbound.mutateAsync(values);
};

<Form form={form} onFinish={onFinish}>
  <Form.Item
    name="port"
    label="Port"
    rules={[antdRule(InboundFormSchema.shape.port, t)]}
  >
    <InputNumber min={1} max={65535} />
  </Form.Item>
</Form>
```

No `safeParse`-on-submit handlers, no `useRef<any>` for form
references, no inline `z.string().min(1)` in rules. Conditional
fields use `<Form.Item dependencies={...} shouldUpdate>` with the
nested protocol schema.

## Testing

Vitest runs everything under `src/test/`. Schemas have **golden
fixture suites** — one JSON per `(protocol × network × security)`
combination round-tripped through `schema.parse` → link generator
→ snapshot. Regenerate snapshots after intentional changes:

```sh
npx vitest run -u
```

Fixtures live in `src/test/golden/fixtures/` and are auto-discovered
via `import.meta.glob`.

## Adding a new page

Most new routes go inside the admin SPA (`index.html`) via
`routes.tsx` — no new HTML or Vite entry needed.

1. Add the page component under `src/pages/<page>/`.
2. Register it in `src/routes.tsx` under the `/panel/...` tree.
3. If you need a brand-new top-level bundle (login-style standalone
   page), add the HTML at `frontend/<page>.html`, an entry at
   `src/entries/<page>.tsx`, and register it in `rollupOptions.input`
   in `vite.config.js`. Then add the Go controller call to
   `serveDistPage(c, "<page>.html")`.