# DSL for Rack apps to create simple API interfaces. 
# https://github.com/stripe/poncho#readme
class ChargeResource < Poncho::Resource
  param :amount, :type => :integer
  param :currency

  def currency
    super || 'USD'
  end
end

class ChargeCreateMethod < Poncho::JSONMethod
  param :amount, :type => :integer, :required => true
  param :currency, :in => ['USD', 'GBP']

  def invoke
    charge = Charge.new
    charge.amount = param(:amount)
    charge.currency = param(:currency)
    charge.save

    ChargeResource.new(charge)
  end
end

post '/charges', &ChargeCreateMethod