Repository Pattern

example-pricing-gem.rb

# Gem
module PricingEngine
  class Engine
    #... 
    # Calculates the price for variants given the buyer context.
    #
    # @param context [Schema::BuyerContext] the buyer context
    #
    # @return [Array<PricingEngine::Schema::Price>] An array of prices for the context passed.
    def calculate_prices_for_variants(context)
      variant_ids = get_variant_ids_from_context(context)
      variants = variants_by_id(variant_ids) # needs to talk to datasources.
      process(variants)
    end
    #...
  end  
end