module Doorkeeper::Grape::Helpers

def decorated_request
  AuthorizationDecorator.new(request)
end

def doorkeeper_authorize!(*scopes)
  endpoint_scopes = env["api.endpoint"].route_setting(:scopes)
  scopes = if endpoint_scopes
             Doorkeeper::OAuth::Scopes.from_array(endpoint_scopes)
           elsif scopes && !scopes.empty?
             Doorkeeper::OAuth::Scopes.from_array(scopes)
           end
  super(*scopes)
end

def doorkeeper_render_error_with(error)
  status_code = case error.status
                when :unauthorized
                  401
                when :forbidden
                  403
                end
  error!({ error: error.description }, status_code, error.headers)
end

def doorkeeper_token
  @_doorkeeper_token ||= OAuth::Token.authenticate(
    decorated_request,
    *Doorkeeper.configuration.access_token_methods
  )
end