# access-levels

> Simple lib for calculation role/access_level matching

Latest version **1.0.2** (published 2017-10-21) · MIT license · 0 weekly downloads

## Install

```sh
npm install access-levels
pnpm add access-levels
yarn add access-levels
bun add access-levels
```

## Health

**Score 15/100 (F)** — status: abandoned.

Positive: no vulnerabilities.

Warnings: low downloads; no types; no esm support.

Negative: abandoned; low maintenance score.

## Facts

| | |
|---|---|
| Version | 1.0.2 |
| Published | 2017-10-21 |
| First published | 2017-10-20 |
| Weekly downloads | 0 |
| License | MIT |
| TypeScript types | none |
| Module format | CommonJS |
| Dependencies | 0 |
| Known vulnerabilities | 0 |
| Install scripts | no |
| GitHub stars | 0 |
| Author | Alexei Zaviruha |
| Maintainers | azaviruha |
| Keywords | access, levels, roles |

## Links

- npm: https://www.npmjs.com/package/access-levels
- Repository: https://github.com/AZaviruha/access-levels
- Homepage: https://github.com/AZaviruha/access-levels#readme
- Issues: https://github.com/AZaviruha/access-levels/issues
- npm.io page: https://npm.io/package/access-levels

## Recent versions

- 1.0.2 (latest) — 2017-10-21
- 1.0.1 — 2017-10-20
- 1.0.0 — 2017-10-20

## README

# access-levels

Небольшая библиотечка для рассчета уровней доступов по роля, по принципу бинарных масок.

Идея реализации позаимствована [отсюда]( http://frederiknakstad.com/2013/01/21/authentication-in-single-page-applications-with-angular-js/).

## Usage

```js
import buildLevels from 'access-levels'

const accessLevelsConfig = {
    'public': '*',
    'anon': [ 'anon' ],
    'user' : [ 'user', 'admin' ],
    'admin': [ 'admin' ]
}

const { roles, accessLevels } = buildLevels(accessLevelsConfig)

/**
 > roles
 { anon: { bitMask: 1, title: 'anon' },
  user: { bitMask: 2, title: 'user' },
  admin: { bitMask: 4, title: 'admin' } }

 > accessLevels
 { public: 7, anon: 1, user: 6, admin: 4 }
 */

const hasUserAccess = !!(roles.user.bitMask & accessLevels.user) // true
const hasAdminAccess = !!(roles.user.bitMask & accessLevels.admin) // false
```

Набор доступов и ролей приведенный в примере, встречается достаточно часто. Поэтому, в библиотеке он используется в качестве значения по умолчанию для функции `buildLevels`. Так что, эта строчка сработает аналогично:

```js
const { roles, accessLevels } = buildLevels(/* default */)
```

---
_Source: https://npm.io/package/access-levels · Machine-readable twin of the npm.io package page. Health data is recomputed on every publish._