feat: send invoices and reminder notifications to the customers

packages/server/src/services/Sales/Invoices/SendSaleInvoiceMailReminder.ts

@@ -1,7 +1,18 @@
 import { Inject, Service } from 'typedi';
+import * as R from 'ramda';
+import { assign } from 'lodash';
 import { SendInvoiceMailDTO } from '@/interfaces';
 import Mail from '@/lib/Mail';
 import HasTenancyService from '@/services/Tenancy/TenancyService';
+import { CommandSaleInvoiceValidators } from './CommandSaleInvoiceValidators';
+import { SaleInvoiceMailFormatter } from './SaleInvoiceMailFormatter';
+import {
+  DEFAULT_INVOICE_REMINDER_MAIL_CONTENT,
+  DEFAULT_INVOICE_REMINDER_MAIL_SUBJECT,
+  ERRORS,
+} from './constants';
+import { SaleInvoicePdf } from './SaleInvoicePdf';
+import { ServiceError } from '@/exceptions';
 
 @Service()
 export class SendInvoiceMailReminder {
@@ -11,6 +22,15 @@ export class SendInvoiceMailReminder {
   @Inject('agenda')
   private agenda: any;
 
+  @Inject()
+  private commandInvoiceValidator: CommandSaleInvoiceValidators;
+
+  @Inject()
+  private invoiceFormatter: SaleInvoiceMailFormatter;
+
+  @Inject()
+  private invoicePdf: SaleInvoicePdf;
+
   /**
    * Triggers the reminder mail of the given sale invoice.
    * @param {number} tenantId
@@ -19,12 +39,12 @@ export class SendInvoiceMailReminder {
   public async triggerMail(
     tenantId: number,
     saleInvoiceId: number,
-    messageDTO: SendInvoiceMailDTO
+    messageOptions: SendInvoiceMailDTO
   ) {
     const payload = {
       tenantId,
       saleInvoiceId,
-      messageDTO,
+      messageOptions,
     };
     await this.agenda.now('sale-invoice-reminder-mail-send', payload);
   }
@@ -33,13 +53,13 @@ export class SendInvoiceMailReminder {
    * Triggers the mail invoice.
    * @param {number} tenantId
    * @param {number} saleInvoiceId
-   * @param {SendInvoiceMailDTO} messageDTO
+   * @param {SendInvoiceMailDTO} messageOptions
    * @returns {Promise<void>}
    */
   public async sendMail(
     tenantId: number,
     saleInvoiceId: number,
-    messageDTO: SendInvoiceMailDTO
+    messageOptions: SendInvoiceMailDTO
   ) {
     const { SaleInvoice } = this.tenancy.models(tenantId);
 
@@ -47,17 +67,45 @@ export class SendInvoiceMailReminder {
       .findById(saleInvoiceId)
       .withGraphFetched('customer');
 
-    const toEmail = messageDTO.to || saleInvoice.customer.email;
-    const subject = messageDTO.subject || saleInvoice.invoiceNo;
+    // Validates the invoice existance.
+    this.commandInvoiceValidator.validateInvoiceExistance(saleInvoice);
 
-    if (!toEmail) {
-      return null;
+    const parsedMessageOptions = {
+      attachInvoice: true,
+      subject: DEFAULT_INVOICE_REMINDER_MAIL_SUBJECT,
+      body: DEFAULT_INVOICE_REMINDER_MAIL_CONTENT,
+      to: saleInvoice.customer.email,
+      ...messageOptions,
+    };
+    // In case there is no email address from the customer or from options, throw an error.
+    if (!parsedMessageOptions.to) {
+      throw new ServiceError(ERRORS.NO_INVOICE_CUSTOMER_EMAIL_ADDR);
+    }
+    const formatter = R.curry(this.invoiceFormatter.formatText)(
+      tenantId,
+      saleInvoiceId
+    );
+    const toEmail = parsedMessageOptions.to;
+    const subject = await formatter(parsedMessageOptions.subject);
+    const body = await formatter(parsedMessageOptions.body);
+    const attachments = [];
+
+    if (parsedMessageOptions.attachInvoice) {
+      // Retrieves document buffer of the invoice pdf document.
+      const invoicePdfBuffer = await this.invoicePdf.saleInvoicePdf(
+        tenantId,
+        saleInvoiceId
+      );
+      attachments.push({
+        filename: 'invoice.pdf',
+        content: invoicePdfBuffer,
+      });
     }
     const mail = new Mail()
       .setSubject(subject)
-      .setView('mail/UserInvite.html')
       .setTo(toEmail)
-      .setData({});
+      .setContent(body)
+      .setAttachments(attachments);
 
     await mail.send();
   }