class Users::OmniauthCallbacksController < Devise::OmniauthCallbacksController

  User::SOCIAL_SITES.each do |name|
    define_method name do
      social_site
    end
  end

  private

    def social_site
      @user = OmniauthUser.from_omniauth(request.env["omniauth.auth"], current_user)
      if @user.errors.messages.present?
        redirect_to user_session_path, alert: @user.errors.full_messages.first
      else
        flash[:notice] = I18n.t 'devise.omniauth_callbacks.success', kind: request.env["omniauth.auth"].provider
        sign_in_and_redirect @user, event: :authentication
      end
    end
end