class RuboCop::Cop::Primer::SystemArgumentInsteadOfClass

Component.new(mr: 1)
good
Component.new(classes: “mr-1”)
bad
This cop ensures that components use System Arguments instead of CSS classes.

def autocorrect(node) 

def autocorrect(node)
  lambda do |corrector|
    args = ::Primer::Classify::Utilities.classes_to_args(node.value.value)
    corrector.replace(node.loc.expression, args)
  end
end

def on_send(node) 

def on_send(node)
  return unless valid_node?(node)
  return unless node.arguments?
  # we are looking for hash arguments and they are always last
  kwargs = node.arguments.last
  return unless kwargs.type == :hash
  # find classes pair
  classes_arg = kwargs.pairs.find { |kwarg| kwarg.key.value == :classes }
  return if classes_arg.nil?
  return unless classes_arg.value.type == :str
  # get actual classes
  classes = classes_arg.value.value
  system_arguments = ::Primer::Classify::Utilities.classes_to_hash(classes)
  # no classes are fixable
  return if system_arguments[:classes] == classes
  add_offense(classes_arg, message: INVALID_MESSAGE)
end