class Opal::Rubyspec::FiltersRewriter

def clear_filters!
  @filters = []
end

def current_spec_name
  @specs_stack.join(' ')
end

def filter(spec_name)
  filters << spec_name
end

def filtered?(spec_name)
  filters.include?(spec_name)
end

def filters
  @filters ||= []
end

def fixture(file, *args)
  path = File.dirname(file)
  path = path[0..-7] if path[-7..-1] == '/shared'
  fixtures = path[-9..-1] == '/fixtures' ? '' : 'fixtures'
  File.join(path, fixtures, args)
end

def initialize
  @specs_stack = []
end

def on_send(node)
  _recvr, method_name, *args = *node
  if rubyspec_dsl?(method_name)
    dynamic!
    spec_name, _ = *args.first
    begin
      @specs_stack.push(spec_name)
      if skip?
        s(:nil)
      else
        super
      end
    ensure
      @specs_stack.pop
    end
  elsif method_name == :fixture
    # We want to expand the fixture paths before autoload happens.
    if args.all? { |i| i.type == :str }
      as = args.map { |i| i.children.first }
      s(:str, fixture(*as))
    else
      super
    end
  else
    super
  end
end

def rubyspec_dsl?(method_name)
  RUBYSPEC_DSL.include?(method_name)
end

def skip?
  self.class.filtered?(current_spec_name)
end