r37r0m0d3l/vicis

![Vicis](.github/assets/banner.webp?raw=true "Vicis")

# « Vicis »

Presentation and transformation layer for data output in RESTful APIs.

•• [Vicis Documentation](https://vicis.js.org) •• [JavaScript Repository](https://github.com/vicisjs/vicis) •• [Deno Repository](https://github.com/r37r0m0d3l/deno-vicis) ••

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This is Node.js analogue to these libraries:

-   🐘 [Fractal](https://fractal.thephpleague.com/) for PHP

-   💎 [Roar](https://github.com/trailblazer/roar) for Ruby

-   🍢 [Marshmallow](https://marshmallow.readthedocs.io/en/stable/) for Python

-   ⚡ [FastAPI - Response Model](https://fastapi.tiangolo.com/tutorial/response-model/) for Python FastAPI framework.

---

## 💬 Tl;dr

Code:

```js
import { Vicis } from "vicis";
const configuration = {
  cast: {
    // convert `_id` to integer
    _id: Vicis.INTEGER,
    // convert `registered` to boolean
    registered: Vicis.FLAG,
  },
  nullish: {
    // if not set `confirmed` set to `false`
    confirmed: false,
  },
  exclude: [
    // exclude fields with names like `password`
    /(?:password)/gi, /^(?:_)(?:_)?/,
  ],
  omit: [
    // remove fields that may be personal
    "createdAt", "updatedAt", "deletedAt",
  ],
  rename: {
    // rename `_id` to `id`
    _id: "id",
    // rename `email` to `login`
    email: "login",
  },
  replace: {
    // always replace field value with `null`
    url: null,
  },
  order: [
    // `id` and `login` goes first, then everyone else
    "id", "login",
  ],
};
const model = {
  _id: "54759309034942804",
  email: "johnwick@gmail.com",
  userPassword: "36e80092ff7f1ed72903cda9409b9d2c",
  registered: "1",
  url: "example.com",
  createdAt: "2020-01-01 01:23:45",
  __v: 1
};
const serializer = new Vicis(configuration);
serializer.data(model);
console.log(serializer.getData());
```

Output:

```json
{
  "id": 54759309034942800,
  "login": "johnwick@gmail.com",
  "confirmed": false,
  "registered": true,
  "url": null
}

```

## 🗺️ My other projects

[Full list here](https://r37r0m0d3l.icu/open_source_map)

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