feat: add support for image attachments in mailing service and update template inclusion

Author: tomast1337

server/nest-cli.json

@@ -10,7 +10,7 @@
         ],
         "assets": [
             {
-                "include": "mailing/templates/**/*.hbs",
+                "include": "mailing/templates/**/*.{hbs,png}",
                 "outDir": "dist/server/src/",
                 "exclude": "dist/**/*"
             },

server/src/mailing/mailing.service.spec.ts

@@ -51,6 +51,18 @@ describe('MailingService', () => {
       subject,
       template,
       context,
+      attachments: [
+        {
+          filename: 'background-image.png',
+          cid: 'background-image',
+          path: `${__dirname}/templates/img/background-image.png`,
+        },
+        {
+          filename: 'logo.png',
+          cid: 'logo',
+          path: `${__dirname}/templates/img/logo.png`,
+        },
+      ],
     });
   });
 });

server/src/mailing/mailing.service.ts

@@ -1,6 +1,15 @@
 import { Inject, Injectable, Logger } from '@nestjs/common';
 import { MailerService } from '@nestjs-modules/mailer';
 
+interface EmailOptions {
+  to: string;
+  subject: string;
+  template: string;
+  context: {
+    [name: string]: any;
+  };
+}
+
 @Injectable()
 export class MailingService {
   private readonly logger = new Logger(MailingService.name);
@@ -14,20 +23,25 @@ export class MailingService {
     subject,
     template,
     context,
-  }: {
-    to: string;
-    subject: string;
-    template: string;
-    context: {
-      [name: string]: any;
-    };
-  }): Promise<void> {
+  }: EmailOptions): Promise<void> {
     try {
       await this.mailerService.sendMail({
         to,
         subject,
         template: `${template}`, // The template file name (without extension)
         context, // The context to be passed to the template
+        attachments: [
+          {
+            filename: 'background-image.png',
+            cid: 'background-image',
+            path: `${__dirname}/templates/img/background-image.png`,
+          },
+          {
+            filename: 'logo.png',
+            cid: 'logo',
+            path: `${__dirname}/templates/img/logo.png`,
+          },
+        ],
       });
 
       this.logger.debug(`Email sent to ${to}`);