Express JS Route Grouping

Although there are many express js route grouping packages, I wanted to create a package that is more flexible and easy to use. You can easily group your routes and add middleware to them.

Install

NPM

$ npm i express-route-grouping --save

Yarn

$ yarn add express-route-grouping

Basic Usage

import RouteGrouping from 'express-route-grouping';

const root = RouteGrouping();

const m1 = (req, res, next) => {
  console.log('Middleware 1');
  next();
};

const m2 = (req, res, next) => {
  console.log('Middleware 2');
  next();
};

const auth = (req, res, next) => {
  console.log('Auth Middleware');
  next();
};

root.group('/api', m1, m2, api => {
  api.group('/v1', auth, v1 => {
    v1.get('/users', (req, res) => {
      res.send('Users');
    });
  });
});

app.use(root.getRouter());

Note: You can add as many middlewares as you want.

Add middleware to the group without adding a route.

root.group('/api', m1, m2, api => {
  api.group(auth, perm, api => {
    api.get('/users', (req, res) => {
      res.send('Users');
    });
    api.get('/comments', (req, res) => {
      res.send('Comments');
    });
  });
  api.get('health-check', (req, res) => {
    res.send('OK');
  });
});

Not: You can nest all routes unlimitedly as above.

Resource API Model

You can use the resource API model to create a RESTful API. Resource api modeling is a approach to standarts some generic http operations.

Let's see the examples:

import { IResource } from 'express-route-grouping';

class UserController implements IResource {
  index(req, res) {
    res.send('Users');
  }

  show(req, res) {
    res.send('User');
  }

  store(req, res) {
    res.send('User created');
  }

  update(req, res) {
    res.send('User updated');
  }

  patch(req, res) {
    res.send('User patched');
  }

  destroy(req, res) {
    res.send('User deleted');
  }
}

root.group('/api', m1, m2, api => {
  api.group('/v1/users', v1Auth, v1 => {
    v1.resource(new UserController());
  });

  api.group('/v2/users', v2Auth, v2 => {
    v2.resource(new UserController());
  });
});

The output of the above code is as follows:

v1

GET    /api/v1/users
GET    /api/v1/users/:userId
POST   /api/v1/users
PUT    /api/v1/users/:userId
PATCH  /api/v1/users/:userId
DELETE /api/v1/users/:userId

// added middlewares
middlewares: [m1, m2, v1Auth]

v2

GET    /api/v2/users
GET    /api/v2/users/:userId
POST   /api/v2/users
PUT    /api/v2/users/:userId
PATCH  /api/v2/users/:userId
DELETE /api/v2/users/:userId

// added middlewares
middlewares: [m1, m2, v2Auth]

Note: You don't need to add all routes to the controller. You can add only the routes you want to use.

Resource API Model Configuration

You can configure the resource API model as you wish.

root.resource({
  path: 'blogs.comments.likes',
  handlers: new UserController(),
  middlewares: {
    index: [auth],
    destroy: [auth, perm],
  },
  parameters: {
    blogs: 'slug',
  },
});

The output of the above code is as follows:

GET    /blogs/:slug/comments/:commentId/likes
          ├── middlewares: [auth]
GET    /blogs/:slug/comments/:commentId/likes/:likeId
POST   /blogs/:slug/comments/:commentId/likes
PUT    /blogs/:slug/comments/:commentId/likes/:likeId
PATCH  /blogs/:slug/comments/:commentId/likes/:likeId
DELETE /blogs/:slug/comments/:commentId/likes/:likeId
          ├── middlewares: [auth, perm]

We added the middlewares to the index and destroy routes. We also added the parameter to the blogs route as :slug instead of :blogId.

Resource API Model Configuration Parameters

Name	Type	Required	Description
path	string	false	The path of the resource.
handlers	object	true	The controller object.
middlewares	Endpoints	false	The middlewares object.
parameters	object	false	The parameters object.

Endpoints

Name	Type	Description
index	GET	List all resources
show	GET	Show a resource
store	POST	Create a resource
update	PUT	Update a resource
patch	PATCH	Patch a resource
destroy	DELETE	Delete a resource

Note: This resource configuration model is inspired by the Laravel PHP framework.

Tests

$ npm test

Contributing

Pull requests are welcome. For major changes, please open an issue first to discuss what you would like to change.

License

MIT