class ERBLint::Linters::DisallowActionList

def ignored?(filename)
  filename = Pathname(filename)
  begin
    filename = filename.relative_path_from(Pathname(Dir.getwd))
  rescue ArgumentError
    # raised if the filename does not have Dir.getwd as a prefix
  end
  @config.ignore_files.any? { |pattern| filename.fnmatch?(pattern) }
end

def run(processed_source)
  return if ignored?(processed_source.filename)
  class_regex = /ActionList[\w-]*/
  tags, * = build_tag_tree(processed_source)
  tags.each do |tag|
    next if tag.closing?
    classes =
      if (class_attrib = tag.attributes["class"])
        loc = class_attrib.value_node.loc
        loc.source_buffer.source[loc.begin_pos...loc.end_pos]
      else
        ""
      end
    indices = [].tap do |results|
      classes.scan(class_regex) do
        results << Regexp.last_match.offset(0)
      end
    end
    next if indices.empty?
    indices.each do |(start_idx, end_idx)|
      new_loc = class_attrib.value_node.loc.with(
        begin_pos: class_attrib.value_node.loc.begin_pos + start_idx,
        end_pos: class_attrib.value_node.loc.begin_pos + end_idx
      )
      add_offense(
        new_loc,
        "ActionList classes are only designed to be used by Primer View Components and " \
          "should be considered private. Please reach out in the #primer-rails Slack channel."
      )
    end
  end
end