module Opal::Sprockets::MimeTypes

def mime_types
  @mime_types ||= []
end

def register_mime_type(mime_type)
  mime_types << mime_type
end

def sprockets_extnames_regexp(sprockets, opal_only: false)
  opal_extnames = sprockets.mime_types.map do |type, hash|
    hash[:extensions] if !opal_only || Opal::Sprockets.mime_types.include?(type)
  end.compact.flatten
  opal_extnames << ".js" unless opal_only
  Regexp.union(opal_extnames.map { |i| /#{Regexp.escape(i)}\z/ })
end