Implement updateSubscription feature and refactor billing services

This commit introduces the updateSubscription method to the BillingStrategyProviderService, ensuring that subscriptions can be updated within the billing core. Additionally, a refactor has been applied to the BillingGatewayFactoryService and stripe-billing-strategy.service to improve error handling and the robustness of subscription updates. Logging in the webhook route has been adjusted for clarity and the data model has been enhanced.

packages/billing/lemon-squeezy/src/services/lemon-squeezy-billing-strategy.service.ts

@@ -2,6 +2,7 @@ import {
   cancelSubscription,
   createUsageRecord,
   getCheckout,
+  updateSubscriptionItem,
 } from '@lemonsqueezy/lemonsqueezy.js';
 import 'server-only';
 import { z } from 'zod';
@@ -13,6 +14,7 @@ import {
   CreateBillingPortalSessionSchema,
   ReportBillingUsageSchema,
   RetrieveCheckoutSessionSchema,
+  UpdateSubscriptionParamsSchema,
 } from '@kit/billing/schema';
 import { Logger } from '@kit/shared/logger';
 
@@ -240,4 +242,35 @@ export class LemonSqueezyBillingStrategyService
 
     return { success: true };
   }
+
+  async updateSubscription(
+    params: z.infer<typeof UpdateSubscriptionParamsSchema>,
+  ) {
+    const ctx = {
+      name: 'billing.lemon-squeezy',
+      ...params,
+    };
+
+    Logger.info(ctx, 'Updating subscription...');
+
+    const { error } = await updateSubscriptionItem(params.subscriptionItemId, {
+      quantity: params.quantity,
+    });
+
+    if (error) {
+      Logger.error(
+        {
+          ...ctx,
+          error,
+        },
+        'Failed to update subscription',
+      );
+
+      throw error;
+    }
+
+    Logger.info(ctx, 'Subscription updated successfully');
+
+    return { success: true };
+  }
 }

packages/billing/lemon-squeezy/src/services/lemon-squeezy-webhook-handler.service.ts

@@ -1,7 +1,11 @@
 import { getOrder, getVariant } from '@lemonsqueezy/lemonsqueezy.js';
 import { createHmac, timingSafeEqual } from 'crypto';
 
-import { BillingWebhookHandlerService } from '@kit/billing';
+import {
+  BillingConfig,
+  BillingWebhookHandlerService,
+  getLineItemTypeById,
+} from '@kit/billing';
 import { Logger } from '@kit/shared/logger';
 import { Database } from '@kit/supabase/database';
 
@@ -35,6 +39,8 @@ export class LemonSqueezyWebhookHandlerService
 
   private readonly namespace = 'billing.lemon-squeezy';
 
+  constructor(private readonly config: BillingConfig) {}
+
   /**
    * @description Verifies the webhook signature - should throw an error if the signature is invalid
    */
@@ -307,6 +313,7 @@ export class LemonSqueezyWebhookHandlerService
         product_id: item.product,
         variant_id: item.variant,
         price_amount: item.unitAmount,
+        type: getLineItemTypeById(this.config, item.id),
       };
     });