confirmation: Create render_confirmation_key_error function.

confirmation/models.py

@@ -14,6 +14,8 @@ from django.conf import settings
 from django.contrib.sites.models import Site
 from django.contrib.contenttypes.models import ContentType
 from django.contrib.contenttypes.fields import GenericForeignKey
+from django.http import HttpRequest, HttpResponse
+from django.shortcuts import render
 from django.utils.timezone import now as timezone_now
 
 from zerver.lib.send_email import send_email
@@ -34,6 +36,14 @@ class ConfirmationKeyException(Exception):
         super(Exception, self).__init__()
         self.error_type = error_type
 
+def render_confirmation_key_error(request, exception):
+    # type: (HttpRequest, ConfirmationKeyException) -> HttpResponse
+    if exception.error_type == ConfirmationKeyException.WRONG_LENGTH:
+        return render(request, 'confirmation/link_malformed.html')
+    if exception.error_type == ConfirmationKeyException.EXPIRED:
+        return render(request, 'confirmation/link_expired.html')
+    return render(request, 'confirmation/link_does_not_exist.html')
+
 def generate_key():
     # type: () -> str
     generator = SystemRandom()

templates/confirmation/link_does_not_exist.html

@@ -0,0 +1,17 @@
+{% extends "zerver/portico.html" %}
+
+{% block portico_content %}
+
+<div class="pitch">
+    <hr/>
+    <p class="lead">Whoops. We couldn't find your confirmation link in the system.</p>
+
+    <p>
+        Anyway, shoot us a line at
+        <a href="mailto:{{ support_email }}">{{ support_email }}</a>
+        and we'll get this resolved shortly.
+    </p>
+
+</div>
+
+{% endblock %}

templates/confirmation/link_expired.html

@@ -0,0 +1,17 @@
+{% extends "zerver/portico.html" %}
+
+{% block portico_content %}
+
+<div class="pitch">
+    <hr/>
+    <p class="lead">Whoops. The confirmation link has expired.</p>
+
+    <p>
+        If you're not sure how to generate a new one, shoot us a line at
+        <a href="mailto:{{ support_email }}">{{ support_email }}</a>
+        and we'll get this resolved shortly.
+    </p>
+
+</div>
+
+{% endblock %}

templates/confirmation/link_malformed.html

@@ -0,0 +1,20 @@
+{% extends "zerver/portico.html" %}
+
+{% block portico_content %}
+
+<div class="pitch">
+    <hr/>
+    <p class="lead">Whoops. The confirmation link is malformed.</p>
+
+    <p>Make sure you copied the link correctly in to your browser. If you're
+    still encountering this page, it's probably our fault. We're sorry.</p>
+
+    <p>
+        Anyway, shoot us a line at
+        <a href="mailto:{{ support_email }}">{{ support_email }}</a>
+        and we'll get this resolved shortly.
+    </p>
+
+</div>
+
+{% endblock %}