Notify managers via email on mailbox deletion

musician/views.py

@@ -1,7 +1,9 @@
 import logging
+import smtplib
 
 from django.conf import settings
 from django.core.exceptions import ImproperlyConfigured
+from django.core.mail import mail_managers
 from django.http import HttpResponse, HttpResponseRedirect
 from django.shortcuts import render
 from django.urls import reverse_lazy
@@ -18,15 +20,14 @@ from requests.exceptions import HTTPError
 from . import api, get_version
 from .auth import login as auth_login
 from .auth import logout as auth_logout
-from .forms import LoginForm, MailForm, MailboxCreateForm, MailboxUpdateForm
+from .forms import LoginForm, MailboxCreateForm, MailboxUpdateForm, MailForm
 from .mixins import (CustomContextMixin, ExtendedPaginationMixin,
                      UserTokenRequiredMixin)
-from .models import (Address, Bill, DatabaseService, Mailbox, MailinglistService,
-                     PaymentSource, SaasService, UserAccount)
+from .models import (Address, Bill, DatabaseService, Mailbox,
+                     MailinglistService, PaymentSource, SaasService)
 from .settings import ALLOWED_RESOURCES
 from .utils import get_bootstraped_percent
 
-
 logger = logging.getLogger(__name__)
 
 
@@ -416,8 +417,23 @@ class MailboxDeleteView(CustomContextMixin, UserTokenRequiredMixin, DeleteView):
             # TODO(@slamora): show error message to user
             logger.error(e)
 
+        self.notify_managers(self.object)
+
         return HttpResponseRedirect(self.success_url)
 
+    def notify_managers(self, mailbox):
+        user = self.get_context_data()['profile']
+        subject = 'Mailbox {} ({}) deleted | Musician'.format(mailbox.id, mailbox.name)
+        content = (
+            "User {} ({}) has deleted its mailbox {} ({}) via musician.\n"
+            "The mailbox has been marked as inactive but has not been removed."
+        ).format(user.username, user.full_name, mailbox.id, mailbox.name)
+
+        try:
+            mail_managers(subject, content, fail_silently=False)
+        except (smtplib.SMTPException, ConnectionRefusedError):
+            logger.error("Error sending email to managers", exc_info=True)
+
 
 class DatabasesView(ServiceListView):
     template_name = "musician/databases.html"

userpanel/settings.py

@@ -41,6 +41,8 @@ EMAIL_HOST_PASSWORD = config('EMAIL_HOST_PASSWORD', default='')
 
 EMAIL_PORT = config('EMAIL_PORT', default=25, cast=int)
 
+EMAIL_BACKEND = 'django.core.mail.backends.smtp.EmailBackend'
+
 ALLOWED_HOSTS = config('ALLOWED_HOSTS', default=[], cast=Csv())
 
 
@@ -149,12 +151,6 @@ USE_L10N = True
 USE_TZ = True
 
 
-LANGUAGES = (
-    ('ca', _('Catalan')),
-    ('es', _('Spanish')),
-    ('en', _('English')),
-)
-
 # Static files (CSS, JavaScript, Images)
 # https://docs.djangoproject.com/en/2.2/howto/static-files/
 
@@ -177,3 +173,8 @@ URL_SAAS_GITLAB = config('URL_SAAS_GITLAB', None)
 URL_SAAS_OWNCLOUD = config('URL_SAAS_OWNCLOUD', None)
 
 URL_SAAS_WORDPRESS = config('URL_SAAS_WORDPRESS', None)
+
+
+# Managers: who should get notifications about services changes that
+# may require human actions (e.g. deleted mailboxes)
+MANAGERS = []