feat(server): contact mail notification service

packages/server/src/services/MailTenancy/MailTenancy.ts

@@ -0,0 +1,25 @@
+import config from '@/config';
+import { Tenant } from "@/system/models";
+import { Service } from 'typedi';
+
+
+@Service()
+export class MailTenancy {
+  /**
+   * Retrieves the senders mails of the given tenant.
+   * @param {number} tenantId 
+   */
+  public async senders(tenantId: number) {
+    const tenant = await Tenant.query()
+      .findById(tenantId)
+      .withGraphFetched('metadata');
+
+    return [
+      {
+        mail: config.mail.from,
+        label: tenant.metadata.name,
+        primary: true,
+      }
+    ].filter((item) => item.mail)
+  }
+}