class Benchmark::Memory::HeldResults

def add_result(entry)
  with_hold_file('a') do |file|
    file.write EntrySerializer.new(entry)
    file.write "\n"
  end
end

def any?
  if @path.is_a?(String)
    File.exist?(@path)
  else
    @path.size.positive?
  end
end

def cleanup
  File.delete(@path) if @path.is_a?(String) && File.exist?(@path)
end

def holding?
  !!@path
end

def include?(entry)
  holding? && any? && results.key?(entry.label)
end

def initialize(path = nil)
  @path = path
  @results = {}
end

def load
  return unless holding? && any?
  results = with_hold_file do |file|
    file.map { |line| EntrySerializer.load(line) }
  end
  @results = results.map { |result| [result.label, result.measurement] }.to_h
end

def with_hold_file(access_mode = 'r', &block)
  return unless @path
  if @path.is_a?(String)
    File.open(@path, access_mode, &block)
  else
    yield @path
  end
end