class RuboCop::Cop::Style::ClassMethodsDefinitions


end
end
end
# …
def class_method
class << self
class SomeClass
# good
end
end
# …
def self.class_method
class SomeClass
# bad
@example EnforcedStyle: self_class
end
end
end
# …
def private_class_method
private
attr_accessor :class_accessor
class << self
class SomeClass
# good - contains private method
end
end
attr_accessor :class_accessor
class << self
end
# …
def self.class_method
class SomeClass
# good
end
end
end
# …
def class_method
attr_accessor :class_accessor
class << self
class SomeClass
# bad
@example EnforcedStyle: def_self (default)
Enforces using ‘def self.method_name` or `class << self` to define class methods.

def all_methods_public?(sclass_node) 

def all_methods_public?(sclass_node)
  def_nodes = def_nodes(sclass_node)
  return false if def_nodes.empty?
  def_nodes.all? { |def_node| node_visibility(def_node) == :public }
end

def autocorrect_sclass(node, corrector) 

def autocorrect_sclass(node, corrector)
  rewritten_defs = []
  def_nodes(node).each do |def_node|
    next unless node_visibility(def_node) == :public
    range, source = extract_def_from_sclass(def_node, node)
    corrector.remove(range)
    rewritten_defs << source
  end
  if sclass_only_has_methods?(node)
    corrector.remove(node)
    rewritten_defs.first&.strip!
  else
    corrector.insert_after(node, "\n")
  end
  corrector.insert_after(node, rewritten_defs.join("\n"))
end

def def_nodes(sclass_node) 

def def_nodes(sclass_node)
  sclass_def = sclass_node.body
  return [] unless sclass_def
  if sclass_def.def_type?
    [sclass_def]
  elsif sclass_def.begin_type?
    sclass_def.each_child_node(:def).to_a
  else
    []
  end
end

def def_self_style? 

def def_self_style?
  style == :def_self
end

def extract_def_from_sclass(def_node, sclass_node) 

def extract_def_from_sclass(def_node, sclass_node)
  range = source_range_with_comment(def_node)
  source = range.source.sub!(
    "def #{def_node.method_name}",
    "def self.#{def_node.method_name}"
  )
  source = source.gsub(/^ {#{indentation_diff(def_node, sclass_node)}}/, '')
  [range, source.chomp]
end

def indentation_diff(node1, node2) 

def indentation_diff(node1, node2)
  node1.loc.column - node2.loc.column
end

def on_defs(node) 

def on_defs(node)
  return if def_self_style?
  return unless node.receiver.self_type?
  message = format(MSG, preferred: 'class << self')
  add_offense(node, message: message)
end

def on_sclass(node) 

def on_sclass(node)
  return unless def_self_style?
  return unless node.identifier.self_type?
  return unless all_methods_public?(node)
  add_offense(node, message: MSG_SCLASS) do |corrector|
    autocorrect_sclass(node, corrector)
  end
end

def sclass_only_has_methods?(node) 

def sclass_only_has_methods?(node)
  node.body.def_type? || node.body.each_child_node.all?(&:def_type?)
end