Fera OmniAuth Strategy

This gem adds the omniauth authentication strategy using the oauth2 method for Fera Partner Apps.

To authenticate your partner app on your own follow the instructions in our developer docs here.

Installation

Add this line to your application's Gemfile:

gem 'omniauth-fera', '~> 0.1'

And then execute:

$ bundle install

Setup

Add this code to your initializer if you're using Rails (config/initializers/fera.rb) or somewhere else if you're not.

Rails.application.config.middleware.use OmniAuth::Builder do
  provider :fera,
           ENV['FERA_CLIENT_ID'], # Or replace with your Fera app API client ID
           ENV['FERA_CLIENT_SECRET'], # Or replace with your Fera app API client secret
           callback_url: ENV['FERA_REDIRECT_URI'], # Something like https://www.example.com/auth/fera/callback and should Fera App settings 
           scope: 'read write' # If you're only reading data then omit the 'write' scope.
end

You can find your client ID, client secret and redirect URI in the Fera partner app edit screen.

Usage

After doing the above and rebooting your rack-based web server you can follow the same conventions as found in the OmniAuth gem docs here.

That just means:

You can start an authentication flow by going to /auth/fera
You need to implement/route /auth/fera/callback to a controller action or something similar for your framework.
Within you can grab the auth token from request.env['omniauth.auth']['credentials']['token'] like this:
```
auth_token = request.env['omniauth.auth']['credentials']['token']
```
Save this token value to your database so you can use it later.

BTW, you'll also receive store_id, store_domain, owner_email and store_public_key for your convenience in the GET params of the callback.

Your auth token (AKA access token, AKA auth key) can be used as an API key to access the Fera Private API documented here.

Pre-setting the store/shop

If you already know the Fera account, domain or store you want to connect to in your app you can pass the ?shop parameter with the authentication request like this:

/auth/fera?shop=example.myshopify.com (canonical domain), or
/auth/fera?shop=fsto_someStoreId123 (Fera ID), or
/auth/fera?shop=example.com (vanity domain), or

Once you have an auth key you can use the Fera API easily through the Fera API gem like this:

Fera::API.configure(auth_token) do
  Fera::Review.all # Returns all reviews from the authorized account/store.
end

Contributing

Bug reports and pull requests are welcome on GitHub at https://github.com/feracommerce/omniauth-fera.

How to contribute

To contribute to the repository:

Fork the repository.
Clone the forked repository locally.
Create a branch descriptive of your work. For example "my_new_feature_xyz".
When you're done work, push up that branch to your own forked repository (not the main one).
Visit https://github.com/feracommerce/omniauth-fera and you'll see an option to create a pull request from your forked branch to the master. Create a pull request.

License

The gem is available as open source under the terms of the MIT License.