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Contents
module Hyrax
module Statistics
# An abstract class for generating cumulative graphs
# you must provide a `relation` 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
# @param [Lambda] x_output a lambda for converting x to the desired output value.
# defaults to milliseconds since the epoch
def initialize(delta_x: 7,
x_min: 1.month.ago.beginning_of_day,
x_max: Time.zone.now.end_of_day,
x_output: ->(x) { x.to_i * 1000 })
@delta_x = delta_x
@x_min = x_min
@x_max = x_max
@x_output = x_output
end
def points
Enumerator.new(size) do |y|
x = @x_min
while x <= @x_max
x += @delta_x.days
y.yield [@x_output.call(x), point(@x_min, x)]
end
end
end
private
def point(min, max)
relation.where(query(min, max)).count
end
def query(min, max)
QueryService.new.build_date_query(min, max)
end
# How many points are in this data set
def size
((@x_max - @x_min) / @delta_x.days.to_i).ceil
end
def relation
raise NotImplementedError, "Implement the relation method in a concrete class"
end
end
end
end
Version data entries
13 entries across 13 versions & 1 rubygems