Stripe & Laravel how to upgrade or downgrade session subscription? - laravel

Question

I have some issues using the Laravel Cashier for creating subscriptions.
First, from my backend I am creating a Package, which calls the following two Strip functions:
public function createStripeProduct(array $data)
{
$product = $this->stripe->products->create([
'name' => $data['title']." ".appName(),
]);
return $product->id;
}
public function createStripePrice(array $data)
{
$price = $this->stripe->prices->create([
'unit_amount' => $data['price'] * $this->multiple,
'currency' => $this->currency,
'recurring' => ['interval' => 'month'],
'product' => $data['stripe_prod_id'],
]);
return $price->id;
}
Then in my Controller, I am creating the session:
public function create(Request $request)
{
$key = config('services.stripe.secret');
$stripe = new Stripe\StripeClient($key);
$stripeCustomer = $user->createOrGetStripeCustomer();
$checkout_session = $stripe->checkout->sessions->create([
'customer' => $stripeCustomer['id'],
'success_url' => route('frontend.user.account'),
'cancel_url' => route('frontend.user.account'),
'payment_method_types' => ['card'],
'line_items' => [
[
'price' => $request->stripe_price_id,
'quantity' => 1,
],
],
'mode' => 'subscription',
'allow_promotion_codes' => true,
]);
return $checkout_session['id'];
}
Everything is working so far, but with the implementation, I can subscribe one use multiple times to the same or to a different Package.
How can I prevent this from happening and also how to implement a future upgrade/downgrade of the Package?

Answer 1

To answer your two questions:
1) I can subscribe one use multiple times to the same or to a different Package. How can I prevent this from happening
Your code is fetching a Stripe Customer object in createOrGetStripeCustomer(). You can list all Subscriptions on the Customer with https://stripe.com/docs/api/subscriptions/list#list_subscriptions-customer and then check if you want to create an additional CheckoutSession Subscription on that Customer.
2) how to implement a future upgrade/downgrade of the Package?
You would use the code snippets here: https://stripe.com/docs/billing/subscriptions/upgrade-downgrade#changing where you update the Subscription's SubscriptionItem with a new Price ID.
$sub = \Stripe\Subscription::update('sub_123', [
'cancel_at_period_end' => false,
'proration_behavior' => 'create_prorations',
'items' => [
[
'id' => $subscription->items->data[0]->id,
'price' => 'price_456', // the new Price to update to
],
],
]);