auth0_api.rb

require 'uri'
require 'net/http'
require 'auth0'

class Auth0Api
  def initialize(options = {})
    @client_id = options[:client_id] || ENV['AUTH0_CLIENT_ID']
    @client_secret = options[:client_secret] || ENV['AUTH0_CLIENT_SECRET']
    @domain = options[:domain] || ENV['AUTH0_DOMAIN']
  end

  def client
    @client ||= new_client
  end

  def token
    @token ||= get_token
  end

  private

  def new_client
    Auth0Client.new(
      client_id: @client_id,
      client_secret: @client_secret,
      domain: @domain,
      token: token,
      api_version: 2,
    )
  end

  def get_token
    # TODO: Maybe we should cache this api call?
    get_token_data['access_token']
  end

  def get_token_data
    url = URI("https://#{@domain}/oauth/token")

    http = Net::HTTP.new(url.host, url.port)
    http.use_ssl = true
    http.verify_mode = OpenSSL::SSL::VERIFY_NONE

    request = Net::HTTP::Post.new(url)
    request['content-type'] = 'application/json'
    request.body = JSON.dump({
      grant_type: 'client_credentials',
      client_id: @client_id,
      client_secret: @client_secret,
      audience: "https://#{@domain}/api/v2/",
    })

    response = http.request(request)

    check_http_response!(response)

    data = JSON.parse(response.read_body)

    data
  end

  def check_http_response!(response)
    unless response.kind_of? Net::HTTPSuccess
      puts response.read_body
      response.error!
    end
  end
end