Contents

# Split's helper exposes all kinds of methods we don't want to
# mix into our model classes.
#
# This module exposes only two methods
#  - ab_test and 
#  - ab_test_finished
# that can safely be mixed into any class.
#
# Passes the instance of the class that it's mixed into to the
# Split persistence adapter as context.
#
module Split
  module EncapsulatedHelper

    class ContextShim
      include Split::Helper
      def initialize(context, original_params)
        @context = context
        @_params = original_params
      end
      def ab_user
        @ab_user ||= Split::Persistence.adapter.new(@context)
      end
      def params
        @_params
      end
    end

    def ab_test(*arguments)
      ret = split_context_shim.ab_test(*arguments)
      # TODO there must be a better way to pass a block straight
      # through to the original ab_test
      if block_given?
        if defined?(capture) # a block in a rails view
          block = Proc.new { yield(ret) }
          concat(capture(ret, &block))
          false
        else
          yield(ret)
        end
      else
        ret
      end
    end

    def ab_test_finished(*arguments)
      split_context_shim.finished *arguments
    end

    private

    # instantiate and memoize a context shim in case of multiple ab_test* calls
    def split_context_shim
      _params = defined?(params) ? params : {}
      @split_context_shim ||= ContextShim.new(self, _params)
    end
  end
end

Version data entries

5 entries across 5 versions & 1 rubygems

Version	Path
split-0.7.3	lib/split/encapsulated_helper.rb
split-0.7.2	lib/split/encapsulated_helper.rb
split-0.7.1	lib/split/encapsulated_helper.rb
split-0.7.0	lib/split/encapsulated_helper.rb
split-0.6.6	lib/split/encapsulated_helper.rb