calendar/packages/features/ee/payments/server/stripe-service.ts

import stripe from "@calcom/features/ee/payments/server/stripe";

type StripeCheckoutSessionInput = {
  checkoutSessionId?: string;
  stripeCustomerId?: string;
};

export class StripeService {
  static async getCheckoutSession(input: StripeCheckoutSessionInput) {
    const { checkoutSessionId, stripeCustomerId } = input;

    let customerId: string;
    let isPremiumUsername = false;
    let hasPaymentFailed = false;
    if (checkoutSessionId) {
      try {
        const session = await stripe.checkout.sessions.retrieve(checkoutSessionId);
        if (typeof session.customer !== "string") {
          return {
            valid: false,
          };
        }
        customerId = session.customer;
        isPremiumUsername = true;
        hasPaymentFailed = session.payment_status !== "paid";
      } catch (e) {
        return {
          valid: false,
        };
      }
    } else {
      // eslint-disable-next-line @typescript-eslint/no-non-null-assertion
      customerId = stripeCustomerId!;
    }

    try {
      const customer = await stripe.customers.retrieve(customerId);
      if (customer.deleted) {
        return {
          valid: false,
        };
      }

      return {
        valid: true,
        hasPaymentFailed,
        isPremiumUsername,
        customer: {
          username: customer.metadata.username,
          email: customer.metadata.email,
          stripeCustomerId: customerId,
        },
      };
    } catch (e) {
      return {
        valid: false,
      };
    }
  }
}