module OrbitApp
    module Module
      module VisitorCounterEval
        Version = "0.1"

        def display_visitors(options={})
            map = "function(){ emit( this.referrer,{session_hash: this.session_hash,created_at: this.created_at}); };"
            reduce = "function(key, values){ var sum = 0; values.forEach(function(doc){sum += doc.amount; }); return {amount: sum};};"
            if options.blank?
              impressions = Impression.collection.map_reduce(map, reduce,read: :primary, out: "vr")
            else
              query = Impression.where(options).selector
              impressions = Impression.where(options).collection.map_reduce(map, reduce,read: :primary, out: "vr",:query=>query)
            end
          impressions.count            
        end

        def display_visitors_today
          display_visitors(created_at: {'$gte' => Date.today.beginning_of_day , '$lte' => DateTime.now})
        end

        def display_visitors_this_week
          display_visitors(created_at: {'$gte' => Date.today.beginning_of_day - 7.days, '$lte' => DateTime.now})
        end

        def display_visitors_this_month
          display_visitors(created_at: {'$gte' => Date.today.beginning_of_day - 1.month, '$lte' => DateTime.now})
        end

        def display_visitors_this_year
          display_visitors(created_at: {'$gte' => Date.today.beginning_of_day - 1.year, '$lte' =>DateTime.now})
        end
      end # end of VisitorCounterEval
  end # of Module
end # of OrbitApp