feat(nestjs): migrate to NestJS

packages/server/src/modules/MailTenancy/MailTenancy.module.ts

@@ -0,0 +1,9 @@
+import { Module } from '@nestjs/common';
+import { MailTenancy } from './MailTenancy.service';
+import { TenancyContext } from '../Tenancy/TenancyContext.service';
+
+@Module({
+  providers: [MailTenancy, TenancyContext],
+  exports: [MailTenancy],
+})
+export class MailTenancyModule {}

packages/server/src/modules/MailTenancy/MailTenancy.service.ts

@@ -0,0 +1,27 @@
+import { Injectable } from '@nestjs/common';
+import { TenancyContext } from '../Tenancy/TenancyContext.service';
+import { ConfigService } from '@nestjs/config';
+
+@Injectable()
+export class MailTenancy {
+  constructor(
+    private readonly tenancyContext: TenancyContext,
+    private readonly config: ConfigService
+  ) {}
+
+  /**
+   * Retrieves the senders mails of the given tenant.
+   */
+  public async senders() {
+    const tenantMetadata = await this.tenancyContext.getTenantMetadata();
+    const from = this.config.get('mail.from');
+
+    return [
+      {
+        mail: from,
+        label: tenantMetadata.name,
+        primary: true,
+      }
+    ].filter((item) => item.mail)
+  }
+}