Class: AmplitudeExperiment::AssignmentService

Inherits:
Object
  • Object
show all
Defined in:
lib/experiment/local/assignment/assignment_service.rb

Overview

AssignmentService

Instance Method Summary collapse

Constructor Details

#initialize(amplitude, assignment_filter) ⇒ AssignmentService

Returns a new instance of AssignmentService.



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# File 'lib/experiment/local/assignment/assignment_service.rb', line 5

def initialize(amplitude, assignment_filter)
  @amplitude = amplitude
  @assignment_filter = assignment_filter
end

Instance Method Details

#to_event(assignment) ⇒ Object 



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# File 'lib/experiment/local/assignment/assignment_service.rb', line 14

def to_event(assignment)
  event = AmplitudeAnalytics::BaseEvent.new(
    '[Experiment] Assignment',
    user_id: assignment.user.user_id,
    device_id: assignment.user.device_id,
    event_properties: {},
    user_properties: {}
  )

  assignment.results.each do |results_key, result|
    event.event_properties["#{results_key}.variant"] = result['variant']['key']
  end

  set = {}
  unset = {}

  assignment.results.each do |results_key, result|
    next if result['type'] == FLAG_TYPE_MUTUAL_EXCLUSION_GROUP

    if result['isDefaultVariant']
      unset["[Experiment] #{results_key}"] = '-'
    else
      set["[Experiment] #{results_key}"] = result['variant']['key']
    end
  end

  event.user_properties['$set'] = set
  event.user_properties['$unset'] = unset

  event.insert_id = "#{event.user_id} #{event.device_id} #{AmplitudeExperiment.hash_code(assignment.canonicalize)} #{assignment.timestamp / DAY_MILLIS}"

  event
end

#track(assignment) ⇒ Object 



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# File 'lib/experiment/local/assignment/assignment_service.rb', line 10

def track(assignment)
  @amplitude.track(to_event(assignment)) if @assignment_filter.should_track(assignment)
end