debian-mirror-gitlab/lib/gitlab/experimentation/controller_concern.rb

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# frozen_string_literal: true
require 'zlib'
# Controller concern that checks if an `experimentation_subject_id cookie` is present and sets it if absent.
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# Used for A/B testing of experimental features. Exposes the `experiment_enabled?(experiment_name, subject: nil)` method
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# to controllers and views. It returns true when the experiment is enabled and the user is selected as part
# of the experimental group.
#
module Gitlab
module Experimentation
module ControllerConcern
include ::Gitlab::Experimentation::GroupTypes
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include Gitlab::Tracking::Helpers
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extend ActiveSupport::Concern
included do
before_action :set_experimentation_subject_id_cookie, unless: :dnt_enabled?
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helper_method :experiment_enabled?, :experiment_tracking_category_and_group, :record_experiment_group
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end
def set_experimentation_subject_id_cookie
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if Gitlab.com?
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return if cookies[:experimentation_subject_id].present?
cookies.permanent.signed[:experimentation_subject_id] = {
value: SecureRandom.uuid,
secure: ::Gitlab.config.gitlab.https,
httponly: true
}
else
# We set the cookie before, although experiments are not conducted on self managed instances.
cookies.delete(:experimentation_subject_id)
end
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end
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def push_frontend_experiment(experiment_key, subject: nil)
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var_name = experiment_key.to_s.camelize(:lower)
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enabled = experiment_enabled?(experiment_key, subject: subject)
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gon.push({ experiments: { var_name => enabled } }, true)
end
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def experiment_enabled?(experiment_key, subject: nil)
return true if forced_enabled?(experiment_key)
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return false if dnt_enabled?
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Experimentation.log_invalid_rollout(experiment_key, subject)
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subject ||= experimentation_subject_id
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Experimentation.in_experiment_group?(experiment_key, subject: subject)
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end
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def track_experiment_event(experiment_key, action, value = nil, subject: nil)
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return if dnt_enabled?
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track_experiment_event_for(experiment_key, action, value, subject: subject) do |tracking_data|
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::Gitlab::Tracking.event(tracking_data.delete(:category), tracking_data.delete(:action), **tracking_data.merge!(user: current_user))
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end
end
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def frontend_experimentation_tracking_data(experiment_key, action, value = nil, subject: nil)
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return if dnt_enabled?
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track_experiment_event_for(experiment_key, action, value, subject: subject) do |tracking_data|
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gon.push(tracking_data: tracking_data)
end
end
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def record_experiment_user(experiment_key, context = {})
return if dnt_enabled?
return unless Experimentation.active?(experiment_key) && current_user
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subject = Experimentation.rollout_strategy(experiment_key) == :cookie ? nil : current_user
::Experiment.add_user(experiment_key, tracking_group(experiment_key, nil, subject: subject), current_user, context)
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end
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def record_experiment_group(experiment_key, group)
return if dnt_enabled?
return unless Experimentation.active?(experiment_key) && group
variant_subject = Experimentation.rollout_strategy(experiment_key) == :cookie ? nil : group
variant = tracking_group(experiment_key, nil, subject: variant_subject)
::Experiment.add_group(experiment_key, group: group, variant: variant)
end
def record_experiment_conversion_event(experiment_key, context = {})
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return if dnt_enabled?
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return unless current_user
return unless Experimentation.active?(experiment_key)
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::Experiment.record_conversion_event(experiment_key, current_user, context)
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end
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def experiment_tracking_category_and_group(experiment_key, subject: nil)
"#{tracking_category(experiment_key)}:#{tracking_group(experiment_key, '_group', subject: subject)}"
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end
private
def experimentation_subject_id
cookies.signed[:experimentation_subject_id]
end
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def track_experiment_event_for(experiment_key, action, value, subject: nil)
return unless Experimentation.active?(experiment_key)
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yield experimentation_tracking_data(experiment_key, action, value, subject: subject)
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end
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def experimentation_tracking_data(experiment_key, action, value, subject: nil)
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{
category: tracking_category(experiment_key),
action: action,
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property: tracking_group(experiment_key, "_group", subject: subject),
label: tracking_label(subject),
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value: value
}.compact
end
def tracking_category(experiment_key)
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Experimentation.get_experiment(experiment_key).tracking_category
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end
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def tracking_group(experiment_key, suffix = nil, subject: nil)
return unless Experimentation.active?(experiment_key)
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subject ||= experimentation_subject_id
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group = experiment_enabled?(experiment_key, subject: subject) ? GROUP_EXPERIMENTAL : GROUP_CONTROL
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suffix ? "#{group}#{suffix}" : group
end
def forced_enabled?(experiment_key)
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return true if params.has_key?(:force_experiment) && params[:force_experiment] == experiment_key.to_s
return false if cookies[:force_experiment].blank?
cookies[:force_experiment].to_s.split(',').any? { |experiment| experiment.strip == experiment_key.to_s }
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end
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def tracking_label(subject = nil)
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return experimentation_subject_id if subject.blank?
if subject.respond_to?(:to_global_id)
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Digest::SHA256.hexdigest(subject.to_global_id.to_s)
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else
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Digest::SHA256.hexdigest(subject.to_s)
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end
end
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end
end
end