@zakodium/adonis-authorization v0.1.0

Adonis Authorization

Authorization provider for AdonisJS.

Prerequisites

This provider requires Adonis v5 preview and won't work with Adonis v4.

Installation

npm i @zakodium/adonis-authorization
node ace invoke @zakodium/adonis-authorization

Documentation

Introduction

The API of this provider is heavily inspired from Laravel's Authorization feature, though it was designed a bit differently to take TypeScript types into account.

Authorization is always asynchronous (returning promises), even if the methods are implemented using synchronous callbacks.

Gates

Defining a gate

A gate is a simple callback function associated with a named action. It must return a boolean or a Promise that resolves to a boolean. Any other value will be rejected and result in a thrown Exception, to avoid security-impacting mistakes.

To write new gates, add entries to the Gate.registerActions call in start/authorization.ts:

For example:

import { Gate } from '@ioc:Adonis/Addons/Authorization';

export const actions = Gate.registerActions({
  'some-action': (user) => {
    return user.isAdmin;
  },
});

Gate with parameters

A gate can define any number of parameters, that will be expected to be passed the callback after the user object:

import { Gate, User } from '@ioc:Adonis/Addons/Authorization';

import Post from 'App/Models/Post';

export const actions = Gate.registerActions({
  'some-action': (user, post: Post, requireAdmin: boolean) => {
    if (requireAdmin) {
      return user.isAdmin;
    } else {
      return post.userId === user.id;
    }
  },
});

Note that the user parameter is typed automatically, but you need to explicitly type the other parameters, otherwise they default to any.

Gate allowing guests

By default, gates do not allow guests (unauthenticated users). The gate callback is not called and the gate behaves as if the callback returned false.

It is possible to opt into allowing guests, by passing { allowGuest: true } while defining the gate. In that case, the gate callback will be called for guests, with the user parameter being null.

import { Gate } from '@ioc:Adonis/Addons/Authorization';

export const actions = Gate.registerActions({
  'some-action': {
    allowGuest: true,
    gate(user) {
      if (!user) {
        // We have a guest.
        return false;
      }
      return user.isAdmin;
    },
  },
});

Using gates

TODO

Policies

TODO

License

MIT