# Meal API

A small food menu API with a single-page frontend.

## Files

| File | Purpose |
| --- | --- |
| `index.html` | The frontend (page, styles and script are all inline) |
| `server.js` | The whole backend: the menu data + the routes |
| `package.json` | Only needed so `elysia` can be installed |

`index.html` and `server.js` are the whole application — no `public/` folder,
no separate `menu.js`, `app.js` or `style.css`.

## Run it

```sh
npm install
npm start          # node server.js
```

Then open <http://localhost:3000>.

Other ways to run the exact same file:

```sh
npm run dev        # node --watch server.js   (auto-restart on save)
npm run bun        # bun  server.js
```

`server.js` runs on **both** Node and Bun. Elysia serves through `Bun.serve` on
Bun, and `server.js` loads the `@elysiajs/node` adapter automatically whenever
Bun isn't present, so neither runtime needs its own version of the file.

## Endpoints

| Method | Path | Result |
| --- | --- | --- |
| GET | `/` or `/index.html` | the frontend |
| GET | `/api/menu` | the whole menu |
| GET | `/api/menu/:id` | one menu item |

```sh
curl http://localhost:3000/api/menu
curl http://localhost:3000/api/menu/2
```

### Responses

`GET /api/menu` -> `200`

```json
[
  { "id": 1, "food": "Adobo", "price": 75 },
  { "id": 2, "food": "Fried Chicken", "price": 50 },
  { "id": 3, "food": "Yum Burger", "price": 70 }
]
```

`GET /api/menu/2` -> `200`

```json
{ "id": 2, "food": "Fried Chicken", "price": 50 }
```

| Case | Status | Body |
| --- | --- | --- |
| id doesn't exist (`/api/menu/99`) | `404` | `{ "error": "No menu item with ID 99." }` |
| id isn't a whole number (`/api/menu/abc`, `/api/menu/0`, `/api/menu/1.5`) | `400` | `{ "error": "ID must be a whole number, like 1." }` |
| any non-GET method | `405` | `{ "error": "Method not allowed" }` |
| unknown path (`/nope`) | `404` | `Not found` |

## Menu data

Defined in `server.js`:

```js
const menu = [
  { id: 1, food: 'Adobo', price: 75 },
  { id: 2, food: 'Fried Chicken', price: 50 },
  { id: 3, food: 'Yum Burger', price: 70 },
]
```

## Frontend

`index.html` lets you either load the whole menu or look up a single item by ID.
It fetches the API with `fetch()`, renders the results into a table, and shows a
message instead of the table whenever the API returns an error.