Addresses issue ietf-tools#628, using reverse() and the newly created helper function

reverse_lazy()  (found in ietf/utils/lazy.py) to DRY out the code a bit by 
decoupling the urls from being hardcoded.

With this commit idrfc, and ipr modules have been modified to take advantage 
of the reverse() and reverse_lazy() functions.
 - Legacy-Id: 2948

Author: Brandon Height

bmheight/ietf/idrfc/idrfc_wrapper.py

@@ -38,6 +38,8 @@
 from datetime import date
 from django.utils import simplejson as json
 from django.db.models import Q
+from django.db import models
+from django.core.urlresolvers import reverse
 import types
 
 BALLOT_ACTIVE_STATES = ['In Last Call',
@@ -198,11 +200,11 @@ def draft_name_and_revision(self):
 
     def friendly_state(self):
         if self.draft_status == "RFC":
-            return "<a href=\"/doc/rfc%d/\">RFC %d</a>" % (self.rfc_number, self.rfc_number)
+            return "<a href=\"%s\">RFC %d</a>" % (reverse('doc_view', args=['rfc%d' % self.rfc_number]), self.rfc_number)
         elif self.draft_status == "Replaced":
             rs = self.replaced_by()
             if rs:
-                return "Replaced by <a href=\"/doc/%s/\">%s</a>" % (rs[0],rs[0])
+                return "Replaced by <a href=\"%s\">%s</a>" % (reverse('ipr_show', args=[rs[0]]),rs[0]) 
             else:
                 return "Replaced"
         elif self.draft_status == "Active":
@@ -357,8 +359,9 @@ def ad_name(self):
             # TODO: get AD name of the draft
             return None
 
+    @models.permalink
     def get_absolute_url(self):
-        return "/doc/rfc%d/" % (self.rfc_number,)
+        return ('ietf.idrfc.views_doc.document_main', ['rfc%s' % (str(self.rfc_number))])
     def displayname_with_link(self):
         return '<a href="%s">RFC %d</a>' % (self.get_absolute_url(), self.rfc_number)
 

bmheight/ietf/idrfc/views_doc.py

@@ -41,6 +41,7 @@
 from django.utils import simplejson as json
 from django.utils.decorators import decorator_from_middleware
 from django.middleware.gzip import GZipMiddleware
+from django.core.urlresolvers import reverse
 
 from ietf import settings
 from ietf.idtracker.models import InternetDraft, IDInternal, BallotInfo, DocumentComment
@@ -189,7 +190,7 @@ def _get_history(doc, versions):
         results.append({'is_text':True, 'date':doc._draft.expiration_date, 'text':'Draft expired'})
     if doc.is_rfc_wrapper:
         if doc.draft_name:
-            text = 'RFC Published (see <a href="/doc/%s/">%s</a> for earlier history)' % (doc.draft_name,doc.draft_name)
+            text = 'RFC Published (see <a href="%s">%s</a> for earlier history)' % (reverse('doc_view', args=[doc.draft_name]),doc.draft_name)
         else:
             text = 'RFC Published'
         results.append({'is_text':True, 'date':doc.publication_date, 'text':text})

bmheight/ietf/ipr/feeds.py

@@ -3,12 +3,13 @@
 from django.contrib.syndication.feeds import Feed
 from django.utils.feedgenerator import Atom1Feed
 from ietf.ipr.models import IprDetail
+from ietf.utils.lazy import reverse_lazy
 from datetime import datetime, time
 
 class LatestIprDisclosures(Feed):
     feed_type = Atom1Feed
     title = "IPR Disclosures to the IETF"
-    link = "/ipr/"
+    link = reverse_lazy('ipr_showlist')
     description = "Updates on new IPR Disclosures made to the IETF."
     language = "en"
     feed_url = "/feed/ipr/"

bmheight/ietf/ipr/models.py

@@ -4,6 +4,7 @@
 #from django import newforms as forms
 from ietf.idtracker.views import InternetDraft
 from ietf.idtracker.models import Rfc
+from ietf.utils.lazy import reverse_lazy
 
 # ------------------------------------------------------------------------
 # Models
@@ -115,8 +116,9 @@ def __str__(self):
 	return self.title
     def docs(self):
         return list(self.drafts.all()) + list(self.rfcs.all())
+    @models.permalink
     def get_absolute_url(self):
-        return "/ipr/%d/" % self.ipr_id
+        return ('ietf.ipr.views.show', [str(self.ipr_id)])
     def get_submitter(self):
 	try:
 	    return self.contact.get(contact_type=3)

bmheight/ietf/ipr/urls.py

@@ -1,15 +1,16 @@
 # Copyright The IETF Trust 2007, All Rights Reserved
 
-from django.conf.urls.defaults import patterns
+from django.conf.urls.defaults import patterns, url
 from ietf.ipr import views, new, search
+from ietf.utils.lazy import reverse_lazy
 from django.views.generic.simple import redirect_to
 
 urlpatterns = patterns('',
-     (r'^$', views.showlist),
+     url(r'^$', views.showlist, name='ipr_showlist'),
      (r'^about/$', views.default),
      (r'^by-draft/$', views.list_drafts),
-     (r'^(?P<ipr_id>\d+)/$', views.show),
-     (r'^update/$', redirect_to, { 'url': '/ipr/' }),
+     url(r'^(?P<ipr_id>\d+)/$', views.show, name='ipr_show'),
+     (r'^update/$', redirect_to, { 'url': reverse_lazy('ipr_showlist') }),
      (r'^update/(?P<ipr_id>\d+)/$', new.update),
      (r'^new-(?P<type>specific)/$', new.new),
      (r'^new-(?P<type>generic)/$', new.new),

bmheight/ietf/utils/lazy.py

@@ -0,0 +1,20 @@
+from django.utils.functional import lazy
+from django.core.urlresolvers import reverse
+
+"""
+A lazily evaluated version of `reverse()`_.
+
+It is useful for when you need to use a URL reversal before Django's
+URL names map is loaded. Some common cases where this method is necessary are:
+
+    * in your URL configuration (such as the ``url`` argument for the
+      ``django.views.generic.simple.redirect_to`` generic view).
+
+    * providing a reversed URL to a decorator (such as the ``login_url`` argument
+      for the ``django.contrib.auth.decorators.permission_required`` decorator).
+
+Usually unicode would be preference but str is the right type instead of unicode.
+This is because reverse passes through iri_to_uri which converts it to a string 
+"""
+
+reverse_lazy = lazy(reverse, str)

bmheight/ietf/utils/test_utils.py

@@ -215,3 +215,7 @@ def login_testing_unauthorized(tc, remote_user, url):
 
     tc.client.login(remote_user=remote_user)
 
+class ReverseLazyTest(TestCase):
+    def test_redirect_with_lazy_reverse(self):
+        response = self.client.get('/ipr/update/')
+        self.assertRedirects(response, "/ipr/", status_code=301)