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https://github.com/ksmithut/mongoose-role


https://github.com/ksmithut/mongoose-role

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# mongoose-role

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A mongoose plugin to help manage user roles and user access levels.

**Looking for another maintainer. I have been cleaning up my packages and no
longer have the energy to maintain this package. If you are interested in
taking over, please reach out. Otherwise, eventually I will have this package
removed. I doubt this module is used enough for people to read this, but in
case it is read, there's your notice.**

There are many ways to handle user account access levels. This one has a very
specific methodology.

- A Model has a **single** role, and it is required.
- You can add as many roles as you want.
- An access level has many roles.
- Access levels are used to make sure a user has access to a given
functionality.

I've thought about adding the ability to have multiple roles and add methods to
check if a user has any of the given roles and all of the given roles. The
single role and setting access levels suits my personal needs, but if you find
it would be useful to have this functionality, sound off in issues and pull
requests.

## Installation

```bash
npm install --save mongoose-role
```

## Usage

```javascript
'use strict'

var UserSchema = new require('mongoose').Schema({
email: String
})

UserSchema.plugin(require('mongoose-role'), {
roles: ['public', 'user', 'admin'],
accessLevels: {
public: ['public', 'user', 'admin'],
anon: ['public'],
user: ['user', 'admin'],
admin: ['admin']
}
})

var User = mongoose.model('User', UserSchema)

var newUser = new User({ email: '[email protected]', role: 'user' })

// The string passed in is an access level
console.log(newUser.hasAccess('public')) // true
console.log(newUser.hasAccess('anon')) // false
console.log(newUser.hasAccess('user')) // true
console.log(newUser.hasAccess('admin')) // false
console.log(newUser.hasAccess(['public', 'user'])) // true
console.log(newUser.hasAccess(['public', 'anon'])) // false (because the user isn't a part of 'anon' access level)
```

It it required that you pass in options to the plugin. This way you can set up
the roles and access levels. As mentioned, users must have one of the roles
passed into the `roles` option. The `accessLevels` are an easy way to configure
which types of users will have access to certain functionality of your app.

For example, you could create an express middleware that verifies a user's
permissions before they can access an API endpoint.

```javascript
function hasAccess(accessLevel) {
return function(req, res, next) {
if (req.session.user && req.session.user.hasAccess(accessLevel)) {
return next()
}
return res.json({
success: false,
error: 'Unauthorized'
})
}
}

var router = require('express').Router()

router.get('/some-protected-route', [
hasAccess('user'), // protection middleware
function(req, res, next) {
console.log('you have access!')
res.json({
secure: true,
data: 'super secret data'
})
}
])
```

This plugin adds a `role` String field to a schema. It's set as an enum with the
given `roles` values in the options. It is required, but I may be convinced to
make that optional and set a default value or something.

It also adds a `hasAccess()` method to the model instances. It takes in a
string of one of the accessLevels you defined in the options. If nothing is
passed in, it will return false. Note that in v1, it used to return true. It was
decided that passing in nothing was usually a case of not handling some edge
data cases, such as looking up valid roles for an endpoint from a database. If a
string is passed that isn't one of the access levels, it will return false.

## Options

- `roles` (Array of Strings) - The string representation of the user roles.
Default: `[]`
- `accessLevels` (Object) - An Object hash that has access levels as the
property keys, and arrays of strings as the roles that have that access level.
Default: `{}`
- `rolePath` (String) - The path that the role property will be saved to the
model instance. Default: `'role'`
- `rolesStaticPath` (String) - The path to the exposed roles given in the
options. Default: `'roles'`
- `accessLevelsStaticPath` (String) - The path to the exposed access levels
given in the options. Default: `'accessLevels'`
- `hasAccessMethod` (String) - The instance method name to be used to check a
user's access level. Default: `'hasAccess'`

# Changelog

## 3.0.0

Updates dependencies, removes support for node '4' (because peerDependencies
dropped support).

## 2.0.0

`hasAccess()` when no access levels are passed in returns `false` instead of
`true`.