Add Lemon Squeezy Billing System

packages/billing/gateway/src/server/services/billing-gateway/billing-gateway-factory.service.ts

@@ -0,0 +1,35 @@
+import { z } from 'zod';
+
+import {
+  BillingProviderSchema,
+  BillingStrategyProviderService,
+} from '@kit/billing';
+
+export class BillingGatewayFactoryService {
+  static async GetProviderStrategy(
+    provider: z.infer<typeof BillingProviderSchema>,
+  ): Promise<BillingStrategyProviderService> {
+    switch (provider) {
+      case 'stripe': {
+        const { StripeBillingStrategyService } = await import('@kit/stripe');
+
+        return new StripeBillingStrategyService();
+      }
+
+      case 'lemon-squeezy': {
+        const { LemonSqueezyBillingStrategyService } = await import(
+          '@kit/lemon-squeezy'
+        );
+
+        return new LemonSqueezyBillingStrategyService();
+      }
+
+      case 'paddle': {
+        throw new Error('Paddle is not supported yet');
+      }
+
+      default:
+        throw new Error(`Unsupported billing provider: ${provider as string}`);
+    }
+  }
+}