OmniauthCallbacksController

omniauth_callbacks_controller.rb

class Users::OmniauthCallbacksController < Devise::OmniauthCallbacksController
  def google_oauth2
    @user = User.from_omniauth(request.env["omniauth.auth"])
    if @user.persisted?
      flash[:notice] = I18n.t "devise.omniauth_callbacks.success", :kind => "Google"
      auth = request.env["omniauth.auth"]
      @user.access_token = auth.credentials.token
      @user.expires_at = auth.credentials.expires_at
      @user.refresh_token = auth.credentials.refresh_token
      @user.save!
      sign_in(@user)
      redirect_to tasks_path
    else
      session["devise.google_data"] = request.env["omniauth.auth"]
      redirect_to new_user_registration_url
    end
  end
end