sessions.rb

module ShopifyApp
  class SessionsController < ActionController::Base
    include ShopifyApp::LoginProtection
    layout false, only: :new
    after_action only: :new do |controller|
      controller.response.headers.except!('X-Frame-Options')
    end

    def new
      authenticate if sanitized_shop_name.present?
    end

    def create
      authenticate
    end

    def callback
      if auth_hash
        login_shop
        install_webhooks
        install_scripttags
        create_recurring_application_charge
        perform_after_authenticate_job
      else
        flash[:error] = I18n.t('could_not_log_in')
        redirect_to login_url
      end
    end

    def destroy
      reset_session
      flash[:notice] = I18n.t('.logged_out')
      redirect_to login_url
    end

    private

    def create_recurring_application_charge
      sess = ShopifyAPI::Session.new(shop_name, token)
      ShopifyAPI::Base.activate_session(sess)

      unless ShopifyAPI::RecurringApplicationCharge.current
        recurring_application_charge               = ShopifyAPI::RecurringApplicationCharge.new

        recurring_application_charge.name          = "It's free to use the Shop Hacker marketplace"
        recurring_application_charge.test          = false
        recurring_application_charge.price         = 0.00
        recurring_application_charge.terms         = "You will be automatically charged the merchant cost for each Shop Hacker product your customers order."
        recurring_application_charge.capped_amount = 150
        recurring_application_charge.return_url    = "https://shop-hacker-shopify-app.herokuapp.com/activatecharge"

        if recurring_application_charge.save
          redirect_to recurring_application_charge.confirmation_url
        end
      end
    end

    def authenticate
      if sanitized_shop_name.present?
        session['shopify.omniauth_params'] = { shop: sanitized_shop_name }
        fullpage_redirect_to "#{main_app.root_path}auth/shopify"
      else
        flash[:error] = I18n.t('invalid_shop_url')
        redirect_to return_address
      end
    end

    def login_shop
      sess = ShopifyAPI::Session.new(shop_name, token)

      request.session_options[:renew] = true
      session.delete(:_csrf_token)

      session[:shopify] = ShopifyApp::SessionRepository.store(sess)
      session[:shopify_domain] = shop_name
      session[:shopify_user] = associated_user if associated_user.present?
    end

    def auth_hash
      request.env['omniauth.auth']
    end

    def shop_name
      auth_hash.uid
    end

    def associated_user
      return unless auth_hash['extra'].present?
      auth_hash['extra']['associated_user']
    end

    def token
      auth_hash['credentials']['token']
    end

    def install_webhooks
      return unless ShopifyApp.configuration.has_webhooks?

      WebhooksManager.queue(
        shop_name,
        token,
        ShopifyApp.configuration.webhooks
      )
    end

    def install_scripttags
      return unless ShopifyApp.configuration.has_scripttags?

      ScripttagsManager.queue(
        shop_name,
        token,
        ShopifyApp.configuration.scripttags
      )
    end

    def perform_after_authenticate_job
      config = ShopifyApp.configuration.after_authenticate_job

      return unless config && config[:job].present?

      if config[:inline] == true
        config[:job].perform_now(shop_domain: session[:shopify_domain])
      else
        config[:job].perform_later(shop_domain: session[:shopify_domain])
      end
    end

    def return_address
      session.delete(:return_to) || ShopifyApp::configuration.root_url
    end
  end
end