grecia/app/models/poll/stats.rb

class Poll
  class Stats

    def initialize(poll)
      @poll = poll
    end

    def generate
      stats = %w[total_participants total_participants_web total_web_valid total_web_white total_web_null
                  total_participants_booth total_booth_valid total_booth_white total_booth_null
                  total_valid_votes total_white_votes total_null_votes valid_percentage_web valid_percentage_booth
                  total_valid_percentage white_percentage_web white_percentage_booth total_white_percentage
                  null_percentage_web null_percentage_booth total_null_percentage total_participants_web_percentage
                  total_participants_booth_percentage]
      stats.map { |stat_name| [stat_name.to_sym, send(stat_name)] }.to_h
    end

    private
    
      def total_participants
        total_participants_web + total_participants_booth
      end

      def total_participants_web
        total_web_valid + total_web_white + total_web_null
      end
      
      def total_participants_web_percentage
        (total_participants) == 0 ? 0 : total_participants_web * 100 / total_participants
      end

      def total_participants_booth
        voters.where(origin: 'booth').count
      end
      
      def total_participants_booth_percentage
        (total_participants) == 0 ? 0 : total_participants_booth * 100 / total_participants.to_f        
      end
      
      def total_web_valid
        voters.where(origin: 'web').count        
      end
      
      def valid_percentage_web
        (total_valid_votes) == 0 ? 0 : total_web_valid * 100 / total_valid_votes.to_f
      end
      
      def total_web_white
        0
      end
      
      def white_percentage_web
        0
      end
      
      def total_web_null
        0
      end
      
      def null_percentage_web
        0
      end
      
      def total_booth_valid
        recounts.sum(:total_amount)        
      end
      
      def valid_percentage_booth
        (total_valid_votes) == 0 ? 0 : total_booth_valid * 100 / total_valid_votes.to_f        
      end
      
      def total_booth_white        
        recounts.sum(:white_amount)
      end
      
      def white_percentage_booth
        (total_white_votes) == 0 ? 0 : total_booth_white * 100 / total_white_votes.to_f
      end
      
      def total_booth_null
        recounts.sum(:null_amount)        
      end
      
      def null_percentage_booth
        (total_null_votes == 0) ? 0 : total_booth_null * 100 / total_null_votes.to_f
      end
      
      def total_valid_votes
        total_web_valid + total_booth_valid
      end
      
      def total_valid_percentage
        (total_participants) == 0 ? 0 : total_valid_votes * 100 / total_participants.to_f
      end
      
      def total_white_votes
        total_web_white + total_booth_white
      end
      
      def total_white_percentage
        (total_participants) == 0 ? 0 : total_white_votes * 100 / total_participants.to_f
      end
      
      def total_null_votes
        total_web_null + total_booth_null
      end
      
      def total_null_percentage
        (total_participants) == 0 ? 0 : total_null_votes * 100 / total_participants.to_f
      end

      def voters
        @poll.voters
      end
      
      def recounts
        @poll.recounts
      end

      def stats_cache(key, &block)
        Rails.cache.fetch("polls_stats/#{@poll.id}/#{key}/v7", &block)
      end

  end
end