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# frozen_string_literal: true
# Example:
#
# # In controller include module
# # Track event for index action
#
# include RedisTracking
#
# track_redis_hll_event :index, :show, name: 'i_analytics_dev_ops_score'
#
# You can also pass custom conditions using `if:`, using the same format as with Rails callbacks.
# You can also pass an optional block that calculates and returns a custom id to track.
module RedisTracking
extend ActiveSupport::Concern
class_methods do
def track_redis_hll_event(*controller_actions, name:, if: nil, &block)
custom_conditions = Array.wrap(binding.local_variable_get('if'))
conditions = [:trackable_request?, *custom_conditions]
after_action only: controller_actions, if: conditions do
track_unique_redis_hll_event(name, &block)
end
end
end
private
def track_unique_redis_hll_event(event_name, &block)
custom_id = block_given? ? yield(self) : nil
unique_id = custom_id || visitor_id
return unless unique_id
Gitlab::UsageDataCounters::HLLRedisCounter.track_event(event_name, values: unique_id)
end
def trackable_request?
request.format.html? && request.headers['DNT'] != '1'
end
def visitor_id
return cookies[:visitor_id] if cookies[:visitor_id].present?
return unless current_user
uuid = SecureRandom.uuid
cookies[:visitor_id] = { value: uuid, expires: 24.months }
uuid
end
end
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