added tinyhash implementation for simple URLs to each vote

helios/models.py

@@ -683,6 +683,33 @@ class CastVote(models.Model, electionalgs.CastVote):
   def voter_hash(self):
     return self.voter.hash
 
+  def set_tinyhash(self):
+    """
+    find a tiny version of the hash for a URL slug.
+    """
+    safe_hash = self.vote_hash
+    for c in ['/', '+']:
+      safe_hash = safe_hash.replace(c,'')
+    
+    length = 8
+    while True:
+      vote_tinyhash = safe_hash[:length]
+      if CastVote.objects.filter(vote_tinyhash = vote_tinyhash).count() == 0:
+        break
+      length += 1
+      
+    self.vote_tinyhash = vote_tinyhash
+
+  def save(self, *args, **kwargs):
+    """
+    override this just to get a hook
+    """
+    # not saved yet? then we generate a tiny hash
+    if not self.vote_tinyhash:
+      self.set_tinyhash()
+
+    super(CastVote, self).save(*args, **kwargs)
+  
   @classmethod
   def get_by_voter(cls, voter):
     return cls.objects.filter(voter = voter).order_by('-cast_at')

helios/templates/castvote.html

+{% extends TEMPLATE_BASE %}
+
+{% block title %}{{cast_vote.vote_tinyhash}} — {{election.name}}{% endblock %}
+{% block content %}
+<h2 class="title">Cast Vote {{cast_vote.vote_tinyhash}}</h2>
+cast in <a href="{% url helios.views.one_election_view election.uuid %}">{{election.name}}</a><br />
+by {{voter.name}}
+<br /><br />
+
+
+
+
+{% endblock %}

helios/urls.py

@@ -18,6 +18,9 @@ urlpatterns = patterns('',
   # election shortcut by shortname
   (r'^e/(?P<election_short_name>[^/]+)$', election_shortcut),
 
+  # vote shortcut
+  (r'^v/(?P<vote_tinyhash>[^/]+)$', castvote_shortcut),
+  
   # trustee login
   (r'^t/(?P<election_short_name>[^/]+)/(?P<trustee_email>[^/]+)/(?P<trustee_secret>[^/]+)$', trustee_login),
   

helios/views.py

@@ -99,6 +99,15 @@ def election_shortcut(request, election_short_name):
   else:
     raise Http404
 
+def castvote_shortcut(request, vote_tinyhash):
+  try:
+    cast_vote = CastVote.objects.get(vote_tinyhash = vote_tinyhash)
+  except CastVote.DoesNotExist:
+    raise Http404
+
+  # FIXME: consider privacy of election
+  return render_template(request, 'castvote', {'cast_vote' : cast_vote, 'voter': cast_vote.voter, 'election': cast_vote.voter.election})
+
 @trustee_check
 def trustee_keygenerator(request, election, trustee):
   """