Add notifications for membership changes.

mhackspace/templates/pages/chat.html

@@ -7,7 +7,7 @@
   Pop in and say hi, please wait around our users tend to idle, some one will likely respond given a chance. 
 </p>
 <p>
-<a href="https://riot.im/app/#/room/#maidstone-hackspace:matrix.org">Full screen Chat</a> or grab one of the <a target="_blank" href="https://matrix.org/docs/projects/try-matrix-now.html">mobile apps. 
+<a href="https://riot.im/app/#/room/#maidstone-hackspace:matrix.org">Full screen Chat</a> or grab one of the <a target="_blank" href="https://matrix.org/docs/projects/try-matrix-now.html">mobile apps for Android and Apple phones.</a> 
 </p>
 
 <iframe src="https://riot.im/app/#/room/#maidstone-hackspace:matrix.org" style="width:100%;height:600px;"></iframe>
@@ -18,6 +18,5 @@
 <p>
   Connect directly using irc.freenode.org and the #maidstone-hackspace channel via an irc client.
 </p>
-<a href="https://hangouts.google.com/group/oDcAL0nDfQYfO3qq1">Alternatively join us on our legacy Hangouts chat</a>
 
 {% endblock content %}

mhackspace/users/models.py

@@ -117,3 +117,14 @@ class Rfid(models.Model):
 
     def name(self):
         return self.user.name
+
+
+def send_subscription_update_message(sender, instance, **kwargs):
+    matrix_message.delay(
+        prefix=' - MEMBERSHIP',
+        message='Changed to %s for user %s' % (
+            instance.get_status,
+            instance.user.username))
+
+
+post_save.connect(send_subscription_update_message, sender=Membership)