Contents

module Sufia
  module Statistics
    # An abstract class for generating cumulative graphs
    # you must provide a `point` method in the concrete class
    class OverTime
      # @param [Fixnum] delta_x change in x (in days)
      # @param [Time] x_min minimum date
      # @param [Time] x_max max date
      def initialize(delta_x: 7, x_min: 1.month.ago.beginning_of_day, x_max: Time.zone.now.end_of_day)
        @delta_x = delta_x
        @x_min = x_min
        @x_max = x_max
      end

      def points
        Enumerator.new(size) do |y|
          x = @x_min
          while x <= @x_max
            x += @delta_x.days
            y.yield [x.to_i * 1000, point(@x_min, x)]
          end
        end
      end

      private

        def size
          ((@x_max - @x_min) / @delta_x.days.to_i).ceil
        end

        def point
          raise NotImplementedError, "Implement the point method in a base class"
        end
    end
  end
end

Version data entries

1 entries across 1 versions & 1 rubygems

Version	Path
sufia-7.0.0.beta1	app/services/sufia/statistics/over_time.rb