paginated stats, tweaked voter data structure to hash the voter_id for...

paginated stats, tweaked voter data structure to hash the voter_id for privacy, still testing that latter thing

helios/crypto/electionalgs.py

@@ -428,7 +428,7 @@ class Voter(HeliosObject):
   A voter in an election
   """
   FIELDS = ['election_uuid', 'uuid', 'voter_type', 'voter_id', 'name', 'alias']
-  JSON_FIELDS = ['election_uuid', 'uuid', 'voter_type', 'voter_id', 'name']
+  JSON_FIELDS = ['election_uuid', 'uuid', 'voter_type', 'voter_id_hash', 'name']
   
   # alternative, for when the voter is aliased
   ALIASED_VOTER_JSON_FIELDS = ['election_uuid', 'uuid', 'alias']
@@ -440,6 +440,10 @@ class Voter(HeliosObject):
     else:
       return super(Voter,self).toJSONDict()
 
+  @property
+  def voter_id_hash(self):
+    return utils.hash_b64(self.voter_id)
+
 class Trustee(HeliosObject):
   """
   a trustee

helios/templates/stats.html

@@ -4,6 +4,18 @@
 {% block content %}
 <h1>Statistics</h1>
 
+<p>
+{% if elections_page.has_previous %}
+<a href="?page={{elections_page.previous_page_number}}&limit={{limit}}">previous {{limit}}</a> &nbsp;&nbsp;
+{% endif %}
+
+Elections {{elections_page.start_index}} - {{elections_page.end_index}}&nbsp;&nbsp;
+
+{% if elections_page.has_next %}
+<a href="?page={{elections_page.next_page_number}}&limit={{limit}}">next {{limit}}</a> &nbsp;&nbsp;
+{% endif %}
+</p>
+
 {% for election in elections %}
 <p>
 <b><a href="{% url helios.views.one_election_view election.uuid %}">{{election.name}}</a></b> -- {{election.num_voters}} voters

helios/views.py

@@ -68,9 +68,15 @@ def stats(request):
   if not user or not user.admin_p:
     raise PermissionDenied()
 
-  elections = Election.objects.all().order_by('-created_at')[:25]
+  page = int(request.GET.get('page', 1))
+  limit = int(request.GET.get('limit', 25))
+
+  elections = Election.objects.all().order_by('-created_at')
+  elections_paginator = Paginator(elections, limit)
+  elections_page = elections_paginator.page(page)
 
-  return render_template(request, "stats", {'elections' : elections})
+  return render_template(request, "stats", {'elections' : elections_page.object_list, 'elections_page': elections_page
+                                            'limit' : limit})
     
 ##
 ## General election features