module ActiveAdmin::IndexHelper

def batch_actions_to_display
  @batch_actions_to_display ||= begin
    if active_admin_config && active_admin_config.batch_actions.any?
      active_admin_config.batch_actions.select do |batch_action|
        call_method_or_proc_on(self, batch_action.display_if_block)
      end
    else
      []
    end
  end
end

def collection_empty?(c = collection)
  collection_size(c) == 0
end

def collection_size(c = collection)
  return c.count if c.is_a?(Array)
  return c.length if c.limit_value
  c = c.except :select, :order
  c.group_values.present? ? c.count.count : c.count
end

def scope_name(scope)
  case scope.name
  when Proc then
    self.instance_exec(&scope.name).to_s
  else
    scope.name.to_s
  end
end