add denial email for membership requests

euth/memberships/emails.py

@@ -14,3 +14,8 @@ class RequestReceivedEmail(emails.OpinEmail,
 class RequestAcceptedEmail(emails.OpinEmail,
                            emails.UserNotification):
     template_name = 'request_accepted'
+
+
+class RequestDeniedEmail(emails.OpinEmail,
+                         emails.UserNotification):
+    template_name = 'request_denied'

euth/memberships/models.py

@@ -84,3 +84,4 @@ def accept(self):
 
     def decline(self):
         self.delete()
+        emails.RequestDeniedEmail.send(self)

euth/memberships/templates/emails/request_denied.en.html

@@ -0,0 +1,18 @@
+{% extends 'email_base.html' %}
+{% block subject %}
+Your membership request to {{ request.project.name }} denied
+{% endblock %}
+{% block content %}
+<h2>Your membership request to {{ request.project.name }} on {{ site.name }}</h2>
+<p>Dear {{ receiver.username }},</p>
+
+<p>
+  Your membership request was denied by the initiator or a moderator.
+</p>
+
+<p>
+Best wishes<br>
+<br>
+{{ site.name }} team
+</p>
+{% endblock %}

euth/memberships/templates/emails/request_denied.en.subject

@@ -0,0 +1 @@
+Your membership request to {{ request.project.name }} denied

euth/memberships/templates/emails/request_denied.en.txt

@@ -0,0 +1,7 @@
+Dear {{ receiver.username }},
+
+
+Your membership request was denied by the initiator or a moderator.
+
+Best wishes
+{{ site.name }} team