dawarich/app/controllers/users/omniauth_callbacks_controller.rb

# frozen_string_literal: true

class Users::OmniauthCallbacksController < Devise::OmniauthCallbacksController
  def github
    handle_auth('GitHub')
  end

  def google_oauth2
    handle_auth('Google')
  end

  private

  def handle_auth(provider)
    @user = User.from_omniauth(request.env['omniauth.auth'])

    if @user.persisted?
      flash[:notice] = I18n.t 'devise.omniauth_callbacks.success', kind: provider
      sign_in_and_redirect @user, event: :authentication
    else
      redirect_to new_user_registration_url, alert: @user.errors.full_messages.join("\n")
    end
  end

  def failure
    redirect_to root_path, alert: "Authentication failed: #{params[:message]}"
  end
end