module PhenomenalRails
  class Middleware
    def initialize(app)
      @app=app
      @activation_conditions=Array.new
      Phenomenal::Feature.middleware=self
    end
    
    def add_condition(feature,&block)
      @activation_conditions.push([feature,block])
    end

    def call(env)
      before_call(env)
      @app.call(env)
    end
    
    def before_call(env)
      @activation_conditions.each do |feature_block|
        feature,block = feature_block
        if feature.active?
          block.call(env)
        end
      end
    end
  end
end