/**
  * Return the gateway subscription object for this model.
  *
  * @return DorellJames\Billing\Gateways\SubscriptionInterface
  */
 public function gatewaySubscription()
 {
     if (!$this->everSubscribed()) {
         return null;
     }
     if ($customer = $this->customer()) {
         $customer = $customer->gatewayCustomer();
     }
     return Billing::subscription($this->billing_subscription, $customer);
 }
 /**
  * Resume a canceled subscription in the billing gateway.
  *
  * @param int $quantity
  *
  * @return Subscription
  */
 public function resume($quantity = null)
 {
     if (null === $quantity) {
         $quantity = $this->model->billing_quantity;
     }
     if ($this->is_free || $this->canLocalTrial()) {
         return $this->storeLocal(array('quantity' => $quantity));
     }
     if (!$this->model->canceled()) {
         return $this;
     }
     if (($customer = $this->model->customer()) && $this->card_token) {
         $this->card = $customer->creditcards()->create($this->card_token)->id;
         $this->card_token = null;
     }
     $this->subscription = Billing::subscription($this->model->billing_subscription, $customer ? $customer->gatewayCustomer() : null);
     if ($this->subscription->info()) {
         $this->subscription->update(array('plan' => $this->plan, 'trial_ends_at' => $this->skip_trial ? date('Y-m-d H:i:s') : $this->model->billing_trial_ends_at, 'prorate' => false, 'quantity' => $quantity, 'card_token' => $this->card_token, 'card' => $this->card));
     } else {
         $this->subscription = Billing::subscription(null, $customer ? $customer->gatewayCustomer() : null)->create($this->plan, array('trial_ends_at' => $this->skip_trial ? date('Y-m-d H:i:s') : $this->model->billing_trial_ends_at, 'quantity' => $quantity, 'card_token' => $this->card_token, 'card' => $this->card));
     }
     $this->refresh();
     return $this;
 }