add message to reviewers when proposal is updated

symposion/proposals/views.py

@@ -187,6 +187,16 @@ def proposal_edit(request, pk):
         form = form_class(request.POST, instance=proposal)
         if form.is_valid():
             form.save()
+            if hasattr(proposal, "reviews"):
+                for review in proposal.reviews.distinct("user"):
+                    ctx = {
+                        "user": request.user,
+                        "proposal": proposal,
+                    }
+                    send_email(
+                        [review.user.email], "proposal_updated",
+                        context=ctx
+                    )
             messages.success(request, "Proposal updated.")
             return redirect("proposal_detail", proposal.pk)
     else:

symposion/templates/emails/proposal_updated/message.html

@@ -0,0 +1,8 @@
+{% load account_tags %}
+<p>
+    <b>{% user_display user %}</b> has made changes to <b>{{ proposal.title }}</b> which you have previously reviewed.
+</p>
+<p>
+    {% url review_detail proposal.pk as detail_url %}
+    View the latest version of the proposal online at <a href="http://{{ current_site }}{{ detail_url }}">http://{{ current_site }}{{ detail_url }}</a>
+</p>

symposion/templates/emails/proposal_updated/subject.txt

@@ -0,0 +1 @@
+{% load account_tags %}"{{ proposal.title }}" has been updated by {% user_display user %}