module ActiveAdmin::BatchActions::ResourceExtension

def add_batch_action(sym, title, options = {}, &block)
  @batch_actions[sym] = ActiveAdmin::BatchAction.new(sym, title, options, &block)
end

def add_default_batch_action
  destroy_options = {
    priority: 100,
    confirm: proc { I18n.t("active_admin.batch_actions.delete_confirmation", plural_model: active_admin_config.plural_resource_label.downcase) },
    if: proc { destroy_action_authorized?(active_admin_config.resource_class) }
  }
  add_batch_action :destroy, proc { I18n.t("active_admin.delete") }, destroy_options do |selected_ids|
    batch_action_collection.find(selected_ids).each do |record|
      authorize! ActiveAdmin::Auth::DESTROY, record
      destroy_resource(record)
    end
    redirect_to active_admin_config.route_collection_path(params),
                notice: I18n.t(
                  "active_admin.batch_actions.succesfully_destroyed",
                  count: selected_ids.count,
                  model: active_admin_config.resource_label.downcase,
                  plural_model: active_admin_config.plural_resource_label(count: selected_ids.count).downcase)
  end
end

def batch_actions
  batch_actions_enabled? ? @batch_actions.values.sort : []
end

def batch_actions=(bool)
  @batch_actions_enabled = bool
end

def batch_actions_enabled?
  # If the resource config has been set, use it. Otherwise
  # return the namespace setting
  @batch_actions_enabled.nil? ? namespace.batch_actions : @batch_actions_enabled
end

def clear_batch_actions!
  @batch_actions = {}
end

def initialize(*)
  super
  @batch_actions = {}
  add_default_batch_action
end

def remove_batch_action(sym)
  @batch_actions.delete(sym.to_sym)
end