notify reviewers via email when a changeset is proposed

src/c3nav/editor/models/changeset.py

@@ -18,6 +18,7 @@ from django.utils.translation import ugettext_lazy as _
 from django.utils.translation import ungettext_lazy
 
 from c3nav.editor.models.changedobject import ApplyToInstanceError, ChangedObject
+from c3nav.editor.tasks import send_changeset_proposed_notification
 from c3nav.editor.wrappers import ModelInstanceWrapper, ModelWrapper, is_created_pk
 from c3nav.mapdata.models import LocationSlug, MapUpdate
 from c3nav.mapdata.models.locations import LocationRedirect
@@ -517,6 +518,7 @@ class ChangeSet(models.Model):
         self.last_update = update
         self.last_state_update = update
         self.save()
+        send_changeset_proposed_notification.delay(changeset=self)
 
     def unpropose(self, user):
         new_state = {'proposed': 'unproposed', 'reproposed': 'rejected'}[self.state]

src/c3nav/editor/tasks.py

@@ -0,0 +1,24 @@
+import logging
+
+from django.conf import settings
+from django.contrib.auth.models import User
+from django.core.mail import send_mail
+
+from c3nav.celery import app
+
+logger = logging.getLogger('c3nav')
+
+
+@app.task(bind=True, max_retries=3)
+def send_changeset_proposed_notification(self, changeset):
+    subject = '[c3nav] New Changeset by %s: %s' % (changeset.author.username, changeset.title)
+    for user in User.objects.filter(permissions__review_changesets=True):
+        if not user.email:
+            continue
+        text = (
+            ('Hi %s!\n\n' % user.username) +
+            ('A new Changeset has been proposed by %s:\n\n' % changeset.author.username) +
+            ('---\n\n') +
+            (changeset.title+'\n\n'+changeset.description)
+        )
+        send_mail(subject, text, settings.MAIL_FROM, [user.email])