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# frozen_string_literal: true
require 'objspace'
module Gitlab
module Utils
class DeepSize
Error = Class.new(StandardError)
TooMuchDataError = Class.new(Error)
DEFAULT_MAX_SIZE = 1.megabyte
DEFAULT_MAX_DEPTH = 100
def initialize(root, max_size: DEFAULT_MAX_SIZE, max_depth: DEFAULT_MAX_DEPTH)
@root = root
@max_size = max_size
@max_depth = max_depth
@size = 0
@depth = 0
evaluate
end
def valid?
!too_big? && !too_deep?
end
private
def evaluate
add_object(@root)
rescue Error
# NOOP
end
def too_big?
@size > @max_size
end
def too_deep?
@depth > @max_depth
end
def add_object(object)
@size += ObjectSpace.memsize_of(object)
raise TooMuchDataError if @size > @max_size
add_array(object) if object.is_a?(Array)
add_hash(object) if object.is_a?(Hash)
end
def add_array(object)
with_nesting do
object.each do |n|
add_object(n)
end
end
end
def add_hash(object)
with_nesting do
object.each do |key, value|
add_object(key)
add_object(value)
end
end
end
def with_nesting
@depth += 1
raise TooMuchDataError if too_deep?
yield
@depth -= 1
end
end
end
end
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