Adding #next, #previous, #each for lists to stripe-ruby

gistfile1.rb

module Stripe
  module APIOperations
    module List
      module ClassMethods
        def all(filters={}, opts={})
          opts = Util.normalize_opts(opts)
          response, opts = request(:get, url, filters, opts)
          Util.convert_to_stripe_object(response, opts)
        end
        
        def each(filters={}, opts={}, &block)
          return enum_for(__method__) unless block_given?
          @list_pointer = nil # reset to the start of the list
          
          while true
            page = self.next(filters, opts)
            page.each(&block)
            
            break unless page[:has_more]
          end
          @list_pointer = nil # reset to the start of the list
        end
        
        def next(filters={}, opts={})
          results = all(filters.merge!(starting_after: @list_pointer), opts)
          
          results.data.length > 0 ? @list_pointer = results.data.last.id : nil
          results
        end
        
        def previous(filters={}, opts={})
          results = all(filters.merge!(ending_before: @list_pointer), opts)
          
          results.data.length > 0 ? @list_pointer = results.data.first.id : @list_pointer = nil
          results
        end
      end

      def self.included(base)
        base.extend(ClassMethods)
      end
    end
  end
end