Consolidated Interface to payment services

braintree_payment.rb

class BraintreePayment
  class << self
    def cancel_plan!
    end

    def charge!
    end

    def fetch_customer!
    end

    def list
    end

    def skip_event?
    end

    def update_customer!
    end
  end
end

sample.rb

class PaymentService
  include BraintreePayment
  include StripePayment
  
  class << self
    def create(provider:, user_id:, token:, plan:)
      service(provider: provider).charge!(user_id: user_id, token: token, plan: plan)
    end

    def list(provider:)
      service(provider: provider).list
    end

    def process_event!(event:, provider:)
      service(provier: provider).process!(event: event)
    end
    
  protected
    def service(provider:)
      raise if provider.blank?
      provider.to_s.classify.constantize
    end
  end
end

stripe_payment.rb

class StripePayment
  class << self
    def cancel_plan!
    end

    def charge!
    end

    def fetch_customer!
    end

    def list
    end

    def skip_event?
    end

    def update_customer!
    end
  end
end