class ActiveAdmin::Views::Pages::Form

def default_form_config
  ActiveAdmin::PagePresenter.new do |f|
    f.semantic_errors # show errors on :base by default
    f.inputs
    f.actions
  end
end

def default_form_options
  {
    url: default_form_path,
    as: active_admin_config.param_key
  }
end

def default_form_path
  resource.persisted? ? resource_path(resource) : collection_path
end

def form_presenter
  active_admin_config.get_page_presenter(:form) || default_form_config
end

def main_content
  options = default_form_options.merge form_presenter.options
  if options[:partial]
    render options[:partial]
  else
    active_admin_form_for resource, options, &form_presenter.block
  end
end

def normalized_action
  case params[:action]
  when "create"
    "new"
  when "update"
    "edit"
  else
    params[:action]
  end
end

def title
  if form_presenter[:title]
    helpers.render_or_call_method_or_proc_on(resource, form_presenter[:title])
  else
    assigns[:page_title] || ActiveAdmin::Localizers.resource(active_admin_config).t("#{normalized_action}_model")
  end
end