module <%= class_name %>
  module CurrentIdentity
    extend ActiveSupport::Concern
    HELPER_METHODS = [
      :url_after_create,
      :url_after_destroy,
      :url_after_confirmation,
      :provider_provided?,
      :current_ability,
      :current_config,
      :current_user,
      :signed_in?,
      :user_active?,
      :signed_out?
    ]

    included do
      helper_method(*HELPER_METHODS)

      rescue_from CanCan::AccessDenied do |exception|
        redirect_to main_app.root_url, :alert => exception.message
      end

    end

    def sign_out
      session[:sign_out] = true
    end

    def provider_provided?(provider)
      signed_in? && current_user.user_identities.provider_exists?(provider)
    end

    def current_ability
      @current_ability ||= <%= class_name %>::Ability.new(current_user)
    end

    def current_config
      @current_config ||= ::Settings.default_user_config
    end

    def current_user
      authenticator['current_user']
    end

    def signed_in?
      authenticator['signed_in?']
    end

    def user_active?
      authenticator['user_active?']
    end

    def signed_out?
      authenticator['signed_out?']
    end

    def url_after_create
      auth_in_url
    end

    def url_after_destroy
      root_url
    end

    def url_after_confirmation
      root_url
    end

    private def authenticator
      @authenticator ||= request.env.fetch('authenticator', {})
    end

  end
end