class EenyMeeny::Experiment
Constants
- COOKIE_EXPERIMENT_ID_REGEX
Attributes
end_at[R]
id[R]
name[R]
start_at[R]
total_weight[R]
variations[R]
version[R]
Public Class Methods
find_all()
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# File lib/eeny-meeny/models/experiment.rb, line 15 def self.find_all return [] unless EenyMeeny.config.experiments EenyMeeny.config.experiments.map do |id, experiment| new(id, **experiment) end end
find_by_id(experiment_id)
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# File lib/eeny-meeny/models/experiment.rb, line 22 def self.find_by_id(experiment_id) return unless EenyMeeny.config.experiments experiment = EenyMeeny.config.experiments[experiment_id.to_sym] new(experiment_id, **experiment) if experiment end
new(id, name: '', version: 1, variations: {}, start_at: nil, end_at: nil)
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# File lib/eeny-meeny/models/experiment.rb, line 37 def initialize(id, name: '', version: 1, variations: {}, start_at: nil, end_at: nil) @id = id @name = name @version = version @variations = variations.map do |variation_id, variation| Variation.new(variation_id, **variation) end @total_weight = (@variations.empty? ? 1.0 : @variations.sum { |variation| variation.weight.to_f }) @start_at = Time.zone.parse(start_at) if start_at @end_at = Time.zone.parse(end_at) if end_at end
Public Instance Methods
active?(now = Time.zone.now)
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# File lib/eeny-meeny/models/experiment.rb, line 49 def active?(now = Time.zone.now) return true if @start_at.nil? && @end_at.nil? return true if @end_at.nil? && (@start_at && (now > @start_at)) # specified start - open-ended return true if @start_at.nil? && (@end_at && (now < @end_at)) # unspecified start - specified end !!((@start_at && (now > @start_at)) && (@end_at && (now < @end_at))) # specified start and end end
find_variation(variation_id)
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# File lib/eeny-meeny/models/experiment.rb, line 56 def find_variation(variation_id) @variations.detect { |v| v.id.to_s == variation_id.to_s } end
pick_variation()
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# File lib/eeny-meeny/models/experiment.rb, line 60 def pick_variation Hash[ @variations.map do |variation| [variation, variation.weight] end ].max_by { |_, weight| rand ** (@total_weight / weight) }.first end