feat: Download invoice pdf of the payment link

packages/server/src/api/controllers/ShareLink/PublicSharableLinkController.ts

@@ -22,6 +22,13 @@ export class PublicSharableLinkController extends BaseController {
       this.getPaymentLinkPublicMeta.bind(this),
       this.validationResult
     );
+    router.get(
+      '/:paymentLinkId/invoice/pdf',
+      [param('paymentLinkId').exists()],
+      this.validationResult,
+      this.getPaymentLinkInvoicePdf.bind(this),
+      this.validationResult
+    );
     router.post(
       '/:paymentLinkId/stripe_checkout_session',
       [param('paymentLinkId').exists()],
@@ -80,4 +87,31 @@ export class PublicSharableLinkController extends BaseController {
       next(error);
     }
   }
+
+  /**
+   * Retrieves the sale invoice pdf of the given payment link.
+   * @param {Request} req
+   * @param {Response} res
+   * @param {NextFunction} next
+   */
+  public async getPaymentLinkInvoicePdf(
+    req: Request<{ paymentLinkId: string }>,
+    res: Response,
+    next: NextFunction
+  ) {
+    const { paymentLinkId } = req.params;
+
+    try {
+      const pdfContent = await this.paymentLinkApp.getPaymentLinkInvoicePdf(
+        paymentLinkId
+      );
+      res.set({
+        'Content-Type': 'application/pdf',
+        'Content-Length': pdfContent.length,
+      });
+      res.send(pdfContent);
+    } catch (error) {
+      next(error);
+    }
+  }
 }

packages/server/src/services/PaymentLinks/GetPaymentLinkInvoicePdf.ts

@@ -0,0 +1,33 @@
+import { Inject, Service } from 'typedi';
+import { initalizeTenantServices } from '@/api/middleware/TenantDependencyInjection';
+import { SaleInvoicePdf } from '../Sales/Invoices/SaleInvoicePdf';
+import { PaymentLink } from '@/system/models';
+
+@Service()
+export class GetPaymentLinkInvoicePdf {
+  @Inject()
+  private getSaleInvoicePdfService: SaleInvoicePdf;
+
+  /**
+   * Retrieves the sale invoice PDF of the given payment link id.
+   * @param {number} tenantId
+   * @param {number} paymentLinkId
+   * @returns {Promise<Buffer>}
+   */
+  async getPaymentLinkInvoicePdf(paymentLinkId: string): Promise<Buffer> {
+    const paymentLink = await PaymentLink.query()
+      .findOne('linkId', paymentLinkId)
+      .where('resourceType', 'SaleInvoice')
+      .throwIfNotFound();
+
+    const tenantId = paymentLink.tenantId;
+    await initalizeTenantServices(tenantId);
+
+    const saleInvoiceId = paymentLink.resourceId;
+
+    return this.getSaleInvoicePdfService.saleInvoicePdf(
+      tenantId,
+      saleInvoiceId
+    );
+  }
+}

packages/server/src/services/PaymentLinks/PaymentLinksApplication.ts

@@ -2,6 +2,7 @@ import { Inject, Service } from 'typedi';
 import { GetInvoicePaymentLinkMetadata } from './GetInvoicePaymentLinkMetadata';
 import { CreateInvoiceCheckoutSession } from './CreateInvoiceCheckoutSession';
 import { StripeInvoiceCheckoutSessionPOJO } from '@/interfaces/StripePayment';
+import { GetPaymentLinkInvoicePdf } from './GetPaymentLinkInvoicePdf';
 
 @Service()
 export class PaymentLinksApplication {
@@ -10,6 +11,9 @@ export class PaymentLinksApplication {
 
   @Inject()
   private createInvoiceCheckoutSessionService: CreateInvoiceCheckoutSession;
+  
+  @Inject()
+  private getPaymentLinkInvoicePdfService: GetPaymentLinkInvoicePdf;
 
   /**
    * Retrieves the invoice payment link.
@@ -34,4 +38,16 @@ export class PaymentLinksApplication {
       paymentLinkId
     );
   }
+
+  /**
+   * Retrieves the sale invoice pdf of the given payment link id.
+   * @param {number} tenantId
+   * @param {number} paymentLinkId
+   * @returns
+   */
+  public getPaymentLinkInvoicePdf(paymentLinkId: string) {
+    return this.getPaymentLinkInvoicePdfService.getPaymentLinkInvoicePdf(
+      paymentLinkId
+    );
+  }
 }