module Mtracker

# File lib/mtracker.rb, line 7
def track(label, options = {})
  slack = options[:slack]

  start_time = Time.now
  increment_nest_level

  start_msg = "#{indent}[start#{pid_and_tid}] #{label}"
  put_track_info start_msg, slack

  result = yield

  finish_msg = "#{indent}[end  #{pid_and_tid}] #{label} (#{sprintf('%.3f', Time.now - start_time)} sec)"
  put_track_info finish_msg, slack

  decrement_nest_level
  result
end

# File lib/mtracker.rb, line 51
def decrement_nest_level
  @mtracker_nest_levels ||= {}
  @mtracker_nest_levels[nest_level_key] = @mtracker_nest_levels[nest_level_key] ? @mtracker_nest_levels[nest_level_key] - 1 : 0
end

# File lib/mtracker.rb, line 46
def increment_nest_level
  @mtracker_nest_levels ||= {}
  @mtracker_nest_levels[nest_level_key] = @mtracker_nest_levels[nest_level_key] ? @mtracker_nest_levels[nest_level_key] + 1 : 0
end

# File lib/mtracker.rb, line 27
def indent
  '|   ' * nest_level
end

# File lib/mtracker.rb, line 35
def nest_level
  @mtracker_nest_levels ||= {}
  @mtracker_nest_levels[nest_level_key] ||= 0
end

# File lib/mtracker.rb, line 40
def nest_level_key
  process_id = Process.pid
  thread_id = syscall(186)
  "#{process_id}_#{thread_id}"
end

# File lib/mtracker.rb, line 31
def pid_and_tid
  mtracker_log_pid_and_tid ? " #{nest_level_key}" : ''
end

# File lib/mtracker.rb, line 56
def put_track_info(msg, slack = false)
  if respond_to?(:logger)
    logger.info(msg)
  elsif Rails
    Rails.logger.info(msg)
  else
    puts msg
  end

  send_to_slack(msg) if slack
end

# File lib/mtracker.rb, line 68
def send_to_slack(msg)
  return unless mtracker_slack_url

  uri = URI.parse(mtracker_slack_url)
  data = { text: msg }
  Net::HTTP.post_form(uri, payload: data.to_json)
end