This gem provides an easy way to talk with the API for Gusto.

The functionality for this gem is by no means exhaustive. If there's an endpoint that is unsupported, please feel free to add and open a PR.

Add this line to your application's Gemfile:

gem 'gusto_api'

And then execute:

$ bundle install

Or install it yourself as:

$ gem install gusto_api

In an initializer, say, config/initializers/gusto_api.rb, configure the gem with settings provided by Gusto:

GustoApi.configure do |config|
  config.api_token = 'token'
  config.client_id = 'client id'
  config.client_secret = 'client secret'
  config.redirect_url = 'redirect url'
end

Details are documented here: https://docs.gusto.com/v1/basics/authentication

You'll have to set up a controller for the OAuth authorization callback. Set redirect_url to its URL.

To get the initial URL to trigger the OAuth flow, use

GustoApi::Oauth.auth_url

Link people to that URL and they'll see an authorization page on Gusto's site. After they accept, they'll be redirected to your redirect_url with params[:code] set to a temporary code that can be exchanged for an access_token and refresh_token with:

GustoApi::Oauth.get_token(code)

This returns a hash:

{
  "access_token" => "ju53kDqMS0iPVsOECQF-H0ifxHDFBDTi2BHOopMrW1X",
  "token_type" => "Bearer",
  "expires_in" => 7200,
  "refresh_token" => "64ir0v_ioQMdWin6Dv9poXGW-SI04yQr2oXE67YqgP5",
  "scope" => "public",
  "created_at" => 1610493513
}

The temporary code lasts for 10 minutes and the access token lasts for 2 hours.

After the access token expires, you'll need to use the refresh_token to get a new one:

GustoApi::Oauth.refresh_token(refresh_token)

The hash returned is identical to that returned by get_token. It will give a new access_token and refresh_token. Each refresh_token can only be used once.

This requires configuring the API token above with the token provided by Gusto.

Example with the minimum set of attributes:

GustoApi::Company.create(
  user: {
    first_name: 'George',
    last_name: 'Hampton,'
    email: '[email protected]'
  },
  company: {
    name: 'Hampton LLC'
  }
)

Returns:

{
  "account_claim_url": "https://app.gusto.com/claim_account/3456789"
}

Documentation for full list of attributes and possible errors: https://docs.gusto.com/v1/examples/creating-a-company

To get the authenticated user:

GustoApi::CurrentUser.fetch(access_token)

This will return a hash:

{
  "id" => 7757869449967110,
  "email" => "[email protected]",
  "roles" => {
    "payroll_admin" => {
      "companies" => [
        {
          "id" => 7756341740967741,
          "name" => "Bonusly Demo",
          "trade_name" => "",
          "locations" => [
            {
              "id" => 7757727716494058,
              "street_1" => "912 Silver St.",
              "street_2" => "Suite 1966",
              "city" => "San Francisco",
              "state" => "CA",
              "zip" => "94107",
              "country" => "USA",
              "active" => true
            }
          ]
        }
      ]
    }
  }
}

This and most other endpoints require getting an access_token via OAuth.

GustoApi::Company.new(id, access_token).employees

Documentation for response: https://docs.gusto.com/v1/employees

GustoApi provides two generic Request classes for interacting with the API.

For API endpoints where you use the API key provided by Gusto, there's GustoApi::TokenRequest class with the following initialize signature:

def initialize(endpoint:, method:, params: {})

method must be :get or :post, and endpoint is the URI for the API endpoint starting with "v1/".

params is a hash that will be sent as query params for a GET request or the response's body for a POST.

For API endpoints where you use the access_token fetched via OAuth, there's GustoApi::BearerRequest with the following initialize signature:

def initialize(endpoint:, method:, params: {}, auth_token:)

The arguments are the same except that it requires passing in the access_token as the auth_token argument.

Calling submit on the request instance will use HTTParty to send the request and return the response.

After checking out the repo, run bin/setup to install dependencies. Then, run rake spec to run the tests. You can also run bin/console for an interactive prompt that will allow you to experiment.

To install this gem onto your local machine, run bundle exec rake install. To release a new version, update the version number in version.rb, and then run bundle exec rake release, which will create a git tag for the version, push git commits and tags, and push the .gem file to rubygems.org.

Bug reports and pull requests are welcome on GitHub at https://github.com/bonusly/gusto_api. This project is intended to be a safe, welcoming space for collaboration, and contributors are expected to adhere to the code of conduct.

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

Everyone interacting in the Gusto::Api project's codebases, issue trackers, chat rooms and mailing lists is expected to follow the code of conduct.

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