class RuboCop::Cop::Metrics::BlockNesting

The maximum level of nesting allowed is configurable.
extra level of nesting.
constructs. Despite the cop’s name, blocks are not considered as an
This cop checks for excessive nesting of conditional and looping

def check_nesting_level(node, max, current_level) 

def check_nesting_level(node, max, current_level)
  if NESTING_BLOCKS.include?(node.type)
    current_level += 1 unless elsif?(node)
    if current_level > max
      self.max = current_level
      unless part_of_ignored_node?(node)
        add_offense(node, :expression, message(max)) do
          ignore_node(node)
        end
      end
    end
  end
  node.each_child_node do |child_node|
    check_nesting_level(child_node, max, current_level)
  end
end

def investigate(processed_source) 

def investigate(processed_source)
  return unless processed_source.ast
  max = cop_config['Max']
  check_nesting_level(processed_source.ast, max, 0)
end

def message(max) 

def message(max)
  "Avoid more than #{max} levels of block nesting."
end