dashboard: send collected notifications in mail

circle/dashboard/forms.py

@@ -1092,7 +1092,7 @@ class TraitForm(forms.ModelForm):
 class MyProfileForm(forms.ModelForm):
 
     class Meta:
-        fields = ('preferred_language', )
+        fields = ('preferred_language', 'email_notifications', )
         model = Profile
 
     @property

circle/dashboard/models.py

@@ -84,6 +84,9 @@ class Profile(Model):
         help_text=_('Unique identifier of the person, e.g. a student number.'))
     instance_limit = IntegerField(default=5)
     use_gravatar = BooleanField(default=False)
+    email_notifications = BooleanField(
+        verbose_name=_("Email notifications"), default=True,
+        help_text=_('Wether user wants to get digested email notifications.'))
 
     def notify(self, subject, template, context={}, valid_until=None):
         return Notification.send(self.user, subject, template, context,

circle/dashboard/tasks/local_periodic_tasks.py

+# Copyright 2014 Budapest University of Technology and Economics (BME IK)
+#
+# This file is part of CIRCLE Cloud.
+#
+# CIRCLE is free software: you can redistribute it and/or modify it under
+# the terms of the GNU General Public License as published by the Free
+# Software Foundation, either version 3 of the License, or (at your option)
+# any later version.
+#
+# CIRCLE is distributed in the hope that it will be useful, but WITHOUT ANY
+# WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
+# FOR A PARTICULAR PURPOSE.  See the GNU General Public License for more
+# details.
+#
+# You should have received a copy of the GNU General Public License along
+# with CIRCLE.  If not, see <http://www.gnu.org/licenses/>.
+
+import logging
+from django.conf import settings
+from django.core.mail import send_mail
+from django.template.loader import render_to_string
+from django.utils import timezone
+from django.utils.translation import ungettext, override
+
+from manager.mancelery import celery
+from ..models import Notification
+
+logger = logging.getLogger(__name__)
+
+
+@celery.task(ignore_result=True)
+def send_email_notifications():
+    msgs = {}
+    for i in Notification.objects.filter(status=Notification.STATUS.new,
+                                         valid_until__lt=timezone.now()):
+        if i.to not in msgs:
+            msgs[i.to] = []
+        msgs[i.to].append(i)
+
+    from_email = settings['DEFAULT_FROM_EMAIL']
+
+    for user, i in msgs.iteritems:
+        if (not user.profile or not user.email or not
+                user.profile.email_notifications):
+            continue
+        with override(user.profile.language):
+            context = {'user': user, 'messages': i}
+            subject = ungettext("%d new notification",
+                                "%d new notifications", len(i)) % len(i)
+            body = render_to_string('dashboard/notifications/email.txt',
+                                    context)
+        try:
+            send_mail(subject, body, from_email, (user.email, ))
+        except:
+            logger.error("Failed to send mail to", user, exc_info=True)
+        else:
+            for j in i:
+                j.status = j.STATUS.delivered
+                j.save()

circle/manager/mancelery.py

@@ -63,6 +63,12 @@ celery.conf.update(
             'schedule': timedelta(hours=1),
             'options': {'queue': 'localhost.man'}
         },
+        'dashboard.local_periodic_tasks': {
+            'task': 'dashboard.tasks.local_periodic_tasks.'
+            'send_email_notifications',
+            'schedule': timedelta(hours=24),
+            'options': {'queue': 'localhost.man'}
+        },
     }
 
 )