class Sentry::Transaction

def set_initial_sample_decision(sampling_context:)
  unless @tracing_enabled
    @sampled = false
    return
  end
  unless @sampled.nil?
    @effective_sample_rate = @sampled ? 1.0 : 0.0
    return
  end
  sample_rate =
    if @traces_sampler.is_a?(Proc)
      @traces_sampler.call(sampling_context)
    elsif !sampling_context[:parent_sampled].nil?
      sampling_context[:parent_sampled]
    else
      @traces_sample_rate
    end
  transaction_description = generate_transaction_description
  if [true, false].include?(sample_rate)
    @effective_sample_rate = sample_rate ? 1.0 : 0.0
  elsif sample_rate.is_a?(Numeric) && sample_rate >= 0.0 && sample_rate <= 1.0
    @effective_sample_rate = sample_rate.to_f
  else
    @sampled = false
    log_warn("#{MESSAGE_PREFIX} Discarding #{transaction_description} because of invalid sample_rate: #{sample_rate}")
    return
  end
  if sample_rate == 0.0 || sample_rate == false
    @sampled = false
    log_debug("#{MESSAGE_PREFIX} Discarding #{transaction_description} because traces_sampler returned 0 or false")
    return
  end
  if sample_rate == true
    @sampled = true
  else
    @sampled = Random.rand < sample_rate
  end
  if @sampled
    log_debug("#{MESSAGE_PREFIX} Starting #{transaction_description}")
  else
    log_debug(
      "#{MESSAGE_PREFIX} Discarding #{transaction_description} because it's not included in the random sample (sampling rate = #{sample_rate})"
    )
  end
end