email templating

2025-08-06 23:13:10 +02:00
parent fece4dcee1
commit ba90bf221b
11 changed files with 269 additions and 34 deletions
--- a/apps/backend/assets/ejs-templates/mail/account-created.ejs
+++ b/apps/backend/assets/ejs-templates/mail/account-created.ejs
@@ -0,0 +1,121 @@
+<!DOCTYPE html>
+<html lang="en">
+  <head>
+    <meta charset="UTF-8" />
+    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
+    <title><%= title %></title>
+    <style>
+      /* General body styling for all clients */
+      body {
+        font-family: Arial, sans-serif;
+        background-color: #f4f4f4;
+        margin: 0;
+        padding: 0;
+        -webkit-text-size-adjust: 100%;
+        -ms-text-size-adjust: 100%;
+      }
+      /* Container for the email content */
+      .container {
+        width: 100%;
+        max-width: 600px;
+        margin: 0 auto;
+        background-color: #ffffff;
+        border-collapse: collapse;
+      }
+      /* Header section */
+      .header {
+        background-color: #007bff;
+        color: #ffffff;
+        text-align: center;
+        padding: 20px;
+      }
+      /* Main content section */
+      .content {
+        padding: 20px;
+      }
+      /* Button styling */
+      .button {
+        display: inline-block;
+        background-color: #007bff;
+        color: #ffffff;
+        padding: 10px 20px;
+        border-radius: 5px;
+        text-decoration: none;
+      }
+      /* List items styling */
+      .feature-item {
+        padding: 5px 0;
+        color: #555555;
+      }
+    </style>
+  </head>
+  <body style="background-color: #f4f4f4">
+    <table
+      class="container"
+      role="presentation"
+      cellspacing="0"
+      cellpadding="0"
+      border="0"
+    >
+      <tr>
+        <td
+          class="header"
+          style="
+            background-color: #007bff;
+            color: #ffffff;
+            text-align: center;
+            padding: 20px;
+          "
+        >
+          <h1 style="margin: 0"><%= bodyTitle %></h1>
+        </td>
+      </tr>
+      <tr>
+        <td class="content" style="padding: 20px">
+          <p>
+            Thank you for signing up for our service. We're excited to have you
+            on board!
+          </p>
+
+          <p>Here are some of the key features you can now enjoy:</p>
+
+          <p style="text-align: center; margin: 30px 0">
+            <a
+              href="https://google.com"
+              class="button"
+              style="
+                display: inline-block;
+                background-color: #007bff;
+                color: #ffffff;
+                padding: 10px 20px;
+                border-radius: 5px;
+                text-decoration: none;
+              "
+            >
+              Get Started
+            </a>
+          </p>
+
+          <p>
+            If you have any questions, feel free to reply to this email or visit
+            our
+            <a href="http://goolge.com" style="color: #007bff">support center</a
+            >.
+          </p>
+        </td>
+      </tr>
+      <tr>
+        <td
+          style="
+            text-align: center;
+            padding: 20px;
+            font-size: 12px;
+            color: #888888;
+          "
+        >
+          <p>&copy; <%= currentYear %> Cowsi. All rights reserved.</p>
+        </td>
+      </tr>
+    </table>
+  </body>
+</html>
--- a/apps/backend/assets/i18n/en.json
+++ b/apps/backend/assets/i18n/en.json
@@ -1,4 +1,4 @@
 {
-  "mail.create-user.title": "Welcome to Cowsi",
-  "mail.create-user.body-html": "<h1>Welcome to Cowsi<h1>"
+  "mail.create-user.title": "Welcome to Cowsi!",
+  "mail.create-user.body-title": "Welcome to Cowsi {{name}}!"
 }
--- a/apps/backend/assets/i18n/fr.json
+++ b/apps/backend/assets/i18n/fr.json
@@ -1,4 +1,4 @@
 {
-  "mail.create-user.title": "Bienvenue sur Cowsi",
-  "mail.create-user.body-html": "<h1>Bienvenue sur Cowsi<h1>"
+  "mail.create-user.title": "Bienvenue sur Cowsi!",
+  "mail.create-user.body-title": "Bienvenue sur Cowsi {{name}}!"
 }
--- a/apps/backend/package.json
+++ b/apps/backend/package.json
@@ -26,7 +26,9 @@
    "@nestjs/common": "^11.0.1",
    "@nestjs/core": "^11.0.1",
    "@nestjs/platform-express": "^11.0.1",
+    "dayjs": "^1.11.13",
    "dotenv": "^17.2.1",
+    "ejs": "^3.1.10",
    "i18next": "^25.3.2",
    "i18next-fs-backend": "^2.6.0",
    "kysely": "^0.28.3",
@@ -44,6 +46,7 @@
    "@nestjs/testing": "^11.0.1",
    "@swc/cli": "^0.6.0",
    "@swc/core": "^1.10.7",
+    "@types/ejs": "^3.1.5",
    "@types/express": "^5.0.0",
    "@types/jest": "^29.5.14",
    "@types/node": "^22.10.7",
--- a/apps/backend/src/app.module.ts
+++ b/apps/backend/src/app.module.ts
@@ -7,7 +7,8 @@ import { EnvService } from './services/env/env.service';
 import { UsersRegistry } from './app/users/users-registry';
 import { UsersController } from './app/users/users.controller';
 import { MailerService } from './services/mailer/mailer.service';
-import { localizationServiceProvider } from './services/localization/localization.service';
+import { LOCALIZATION_SERVICE_PROVIDER } from './services/localization/localization.service';
+import { TemplateRendererService } from './services/template-renderer/template-renderer.service';

@Module({
  imports: [],
@@ -19,7 +20,8 @@ import { localizationServiceProvider } from './services/localization/localizatio
    EnvService,
    UsersRegistry,
    MailerService,
-    localizationServiceProvider,
+    LOCALIZATION_SERVICE_PROVIDER,
+    TemplateRendererService,
  ],
 })
 export class AppModule {}
--- a/apps/backend/src/app/users/users.service.ts
+++ b/apps/backend/src/app/users/users.service.ts
@@ -6,6 +6,8 @@ import {
  LOCALIZATION_SERVICE,
  LocalizationService,
 } from '../../services/localization/localization.service';
+import { TemplateRendererService } from '../../services/template-renderer/template-renderer.service';
+import { MailTemplateEnum } from '../../services/template-renderer/mail-template-data';

@Injectable()
 export class UsersService {
@@ -14,18 +16,31 @@ export class UsersService {
    private mailerService: MailerService,
    @Inject(LOCALIZATION_SERVICE)
    private localizationService: LocalizationService,
+    private templateRendererService: TemplateRendererService,
  ) {}

  async createUser(newUser: CreateUser): Promise<void> {
    // FIXME : return result once auth is done
    await this.userRegistry.addUser(newUser);
-    this.localizationService.translate('mail.create-user.title');
+
+    const mailTitle = this.localizationService.translate(
+      'mail.create-user.title',
+    );
+    const mailBodyTitle = this.localizationService.translate(
+      'mail.create-user.body-title',
+      { name: newUser.firstName },
+    );
+    const mailHtml = await this.templateRendererService.renderMailTemplate(
+      MailTemplateEnum.CreateAccount,
+      {
+        title: mailTitle,
+        bodyTitle: mailBodyTitle,
+      },
+    );
    void this.mailerService.sendEmail({
      toAdresses: [newUser.email],
-      subject: 'Your account has been created!',
-      html: `<h1>Welcome to COWSI</h1>
-        <p>Your account has been successfully created</p>
-      `,
+      subject: mailTitle,
+      html: mailHtml,
    });
  }
 }
--- a/apps/backend/src/services/localization/localization.service.ts
+++ b/apps/backend/src/services/localization/localization.service.ts
@@ -6,32 +6,33 @@ import * as i18nextBackend from 'i18next-fs-backend';

 export const LOCALIZATION_SERVICE = 'LOCALIZATION_SERVICE';

-export const localizationServiceProvider: FactoryProvider<LocalizationService> =
-  {
-    provide: LOCALIZATION_SERVICE,
-    scope: Scope.REQUEST,
-    useFactory: async (req: Request) => {
-      const instance = i18next.createInstance().use(i18nextBackend as any);
-      const supportedLang = req
-        .acceptsLanguages()
-        .find((l) => isSupportedLang(l));
-      await instance.init<i18nextBackend.FsBackendOptions>({
-        lng: supportedLang,
-        fallbackLng: 'en',
-        debug: false,
-        backend: {
-          loadPath: `assets/i18n/{{lng}}.json`,
-        },
-      });
-      return new LocalizationService(instance);
-    },
-    inject: ['REQUEST'],
-  };
+export const LOCALIZATION_SERVICE_PROVIDER: Readonly<
+  FactoryProvider<LocalizationService>
+> = {
+  provide: LOCALIZATION_SERVICE,
+  scope: Scope.REQUEST,
+  useFactory: async (req: Request) => {
+    const instance = i18next.createInstance().use(i18nextBackend as any);
+    const supportedLang = req
+      .acceptsLanguages()
+      .find((l) => isSupportedLang(l));
+    await instance.init<i18nextBackend.FsBackendOptions>({
+      lng: supportedLang,
+      fallbackLng: 'en',
+      debug: false,
+      backend: {
+        loadPath: `assets/i18n/{{lng}}.json`,
+      },
+    });
+    return new LocalizationService(instance);
+  },
+  inject: ['REQUEST'],
+};

 export class LocalizationService {
  constructor(private readonly i18n: i18next.i18n) {}

-  translate(key: string) {
-    this.i18n.t(key);
+  translate(key: string, args?: Record<string, unknown>): string {
+    return this.i18n.t(key, args);
  }
 }
--- a/apps/backend/src/services/template-renderer/mail-template-data.ts
+++ b/apps/backend/src/services/template-renderer/mail-template-data.ts
@@ -0,0 +1,27 @@
+const MAIL_BASE = 'assets/ejs-templates/mail';
+
+export interface BaseMailTempalteData {
+  currentYear: number | string;
+}
+
+export enum MailTemplateEnum {
+  CreateAccount = 'create-account',
+}
+
+export interface MailTemplateTypeMap extends Record<MailTemplateEnum, unknown> {
+  [MailTemplateEnum.CreateAccount]: CreateAccountMailTemplateData;
+}
+
+const MAIL_TEMPLATE_PATH_MAP = {
+  [MailTemplateEnum.CreateAccount]: 'account-created.ejs',
+} as const satisfies Record<MailTemplateEnum, string>;
+
+export interface CreateAccountMailTemplateData {
+  title: string;
+  bodyTitle: string;
+}
+
+export function getMailTemplatePath(template: MailTemplateEnum): string {
+  const suffix = MAIL_TEMPLATE_PATH_MAP[template];
+  return `${MAIL_BASE}/${suffix}`;
+}
--- a/apps/backend/src/services/template-renderer/template-renderer.service.spec.ts
+++ b/apps/backend/src/services/template-renderer/template-renderer.service.spec.ts
@@ -0,0 +1,18 @@
+import { Test, TestingModule } from '@nestjs/testing';
+import { TemplateRendererService } from './template-renderer.service';
+
+describe('TemplateRendererService', () => {
+  let service: TemplateRendererService;
+
+  beforeEach(async () => {
+    const module: TestingModule = await Test.createTestingModule({
+      providers: [TemplateRendererService],
+    }).compile();
+
+    service = module.get<TemplateRendererService>(TemplateRendererService);
+  });
+
+  it('should be defined', () => {
+    expect(service).toBeDefined();
+  });
+});
--- a/apps/backend/src/services/template-renderer/template-renderer.service.ts
+++ b/apps/backend/src/services/template-renderer/template-renderer.service.ts
@@ -0,0 +1,29 @@
+import { Injectable } from '@nestjs/common';
+import * as ejs from 'ejs';
+import {
+  BaseMailTempalteData,
+  getMailTemplatePath,
+  MailTemplateEnum,
+  MailTemplateTypeMap,
+} from './mail-template-data';
+import * as dayjs from 'dayjs';
+
+@Injectable()
+export class TemplateRendererService {
+  renderMailTemplate<T extends MailTemplateEnum>(
+    template: T,
+    data: MailTemplateTypeMap[T],
+  ): Promise<string> {
+    return this.render(getMailTemplatePath(template), data);
+  }
+
+  private render(file: string, data: ejs.Data): Promise<string> {
+    const base: BaseMailTempalteData = {
+      currentYear: dayjs().year(),
+    };
+    return ejs.renderFile(file, {
+      ...data,
+      ...base,
+    });
+  }
+}