social-media/backend/Infrastructure/Payments/Stripe/Services/MembershipCancellationProcessor.cs

using Hutopy.Modules.Memberships.Contracts;
using Stripe;

namespace Hutopy.Infrastructure.Payments.Stripe.Services;

public sealed class MembershipCancellationProcessor
    : IMembershipCancellationProcessor
{
    public async Task<DateTimeOffset?> CancelAsync(
        string subscriptionId,
        CancellationToken ct = default)
    {
        SubscriptionService subscriptionService = new();

        // Stripe - Cancel Subscription immediately
        // var subscription = await subscriptionService.CancelAsync(
        //     subscriptionId,
        //     cancellationToken: ct);

        // Stripe - Cancel Subscription AtPeriodEnd
        Subscription? subscription = await subscriptionService.UpdateAsync(
            subscriptionId,
            new SubscriptionUpdateOptions { CancelAtPeriodEnd = true },
            cancellationToken: ct);

        return subscription.CancelAt ?? subscription.CanceledAt;
    }
}