class Users::OmniauthCallbacksController < Devise::OmniauthCallbacksController
  Devise.omniauth_configs.keys.each do |provider|
    define_method(provider.to_s) { omniauth_callback(provider) }
  end

  def failure
    redirect_to root_path
  end

  private

  def omniauth_callback(provider)
    auth_data = request.env["omniauth.auth"]

    user = SigninWithOmniauth.new(auth_data).execute

    if user.present? && user.persisted?
      sign_in_and_redirect user, event: :authentication
      set_flash_message(:notice, :success, kind: provider.to_s.capitalize) if is_navigational_format?
    else
      session["devise.oauth_data"] = auth_data.except(:extra)
      redirect_to new_user_session_path
    end
  end
end