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# frozen_string_literal: true
class Experiment < ApplicationRecord
has_many :experiment_users
has_many :experiment_subjects, inverse_of: :experiment
validates :name, presence: true, uniqueness: true, length: { maximum: 255 }
def self.add_user(name, group_type, user, context = {})
find_or_create_by!(name: name).record_user_and_group(user, group_type, context)
end
def self.add_group(name, variant:, group:)
find_or_create_by!(name: name).record_group_and_variant!(group, variant)
end
def self.record_conversion_event(name, user, context = {})
find_or_create_by!(name: name).record_conversion_event_for_user(user, context)
end
# Create or update the recorded experiment_user row for the user in this experiment.
def record_user_and_group(user, group_type, context = {})
experiment_user = experiment_users.find_or_initialize_by(user: user)
experiment_user.update!(group_type: group_type, context: merged_context(experiment_user, context))
end
def record_conversion_event_for_user(user, context = {})
experiment_user = experiment_users.find_by(user: user)
return unless experiment_user
experiment_user.update!(converted_at: Time.current, context: merged_context(experiment_user, context))
end
def record_group_and_variant!(group, variant)
experiment_subjects.find_or_initialize_by(group: group).update!(variant: variant)
end
private
def merged_context(experiment_user, new_context)
experiment_user.context.deep_merge(new_context.deep_stringify_keys)
end
end
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