Allow disabling quota management in regions

This improves and fixes some issues with the quota management
dashboard when quota management is disabled in a region
(either partially or fully).

* Ensure the Region Quota Details and Quota Size Details pages
  do not return an error when viewing regions that have
  quota management disabled.
* On the Quota Size Details page, if quotas for a resource are not
  managed in a region, set `-` for the current quota, usage and
  percentage values, instead of hiding the table row entirely.
* Make the title formatting nicer for the Region Quota Details and
  Quota Size Details pages.

Change-Id: I1ed74ba6bde647c9184f58278474cbc1cc80e289

adjutant_ui/api/adjutant.py

@@ -625,20 +625,24 @@ def size_details_get(request, size, region=None):
     resp = _get_quota_information(request, regions=region)
 
     data = resp['quota_sizes'][size]
-    region_data = resp['regions'][0]['current_quota']
+    try:
+        region = resp['regions'][0]
+    except IndexError:
+        region = {}
+    current_quota = region.get('current_quota', {})
+    current_usage = region.get('current_usage', {})
     for service, values in data.items():
-        if service not in resp['regions'][0]['current_usage']:
-            continue
         for resource, value in values.items():
             if _is_quota_hidden(service, resource):
                 continue
 
-            usage = resp['regions'][0]['current_usage'][service].get(
-                resource)
-            try:
-                percent = float(usage) / value
-            except (TypeError, ZeroDivisionError):
-                percent = '-'
+            quota = current_quota.get(service, {}).get(resource, '-')
+            usage = current_usage.get(service, {}).get(resource, '-')
+            percent = (
+                '-'
+                if not value or usage == '-'
+                else (usage / value)
+            )
 
             quota_details.append(
                 SIZE_QUOTA_VALUE(
@@ -646,7 +650,7 @@ def size_details_get(request, size, region=None):
                     name=resource,
                     service=service,
                     value=value,
-                    current_quota=region_data[service][resource],
+                    current_quota=quota,
                     current_usage=usage,
                     percent=percent
                 )
@@ -659,7 +663,11 @@ def quota_details_get(request, region):
 
     resp = _get_quota_information(request, regions=region)
 
-    data = resp['regions'][0]['current_quota']
+    try:
+        region = resp['regions'][0]
+    except IndexError:
+        region = {}
+    data = region.get('current_quota', {})
 
     for service, values in data.items():
         for name, value in values.items():

adjutant_ui/content/quota/templates/quota/region_detail.html

@@ -1,6 +1,6 @@
 {% extends 'base.html' %}
 {% load i18n %}
-{% block title %} {% trans "Quota Details" %} {% endblock %}
+{% block title %}{% blocktrans %}{{ region }} Quota Details{% endblocktrans %}{% endblock %}
 
 {% block main %}
   {{ table.render }}

adjutant_ui/content/quota/templates/quota/size_detail.html

@@ -1,10 +1,6 @@
 {% extends 'base.html' %}
 {% load i18n %}
-{% block title %} {{title}} - Quota Details{% endblock %}
-
-{% block page_header %}
-  {% include "horizon/common/_page_header.html" with title=title %}
-{% endblock page_header %}
+{% block title %}{% blocktrans %}{{ size_titlecase }} Quota Details{% endblocktrans %}{% endblock %}
 
 {% block main %}
   {{ table.render }}

adjutant_ui/content/quota/views.py

@@ -57,7 +57,7 @@ class IndexView(horizon_tables.MultiTableView):
 class RegionDetailView(horizon_tables.DataTableView):
     table_class = quota_tables.RegionQuotaDetailTable
     template_name = 'management/quota/region_detail.html'
-    page_title = _("'{{ region }}' Quota Details")
+    page_title = _("{{ region }} Quota Details")
 
     def get_data(self):
         try:
@@ -76,7 +76,7 @@ class RegionDetailView(horizon_tables.DataTableView):
 class QuotaSizeView(horizon_tables.DataTableView):
     table_class = quota_tables.QuotaDetailUsageTable
     template_name = 'management/quota/size_detail.html'
-    page_title = _("'{{ size }}' Quota Details")
+    page_title = _("{{ size | title }} Quota Details")
 
     def get_data(self):
         try:
@@ -89,8 +89,10 @@ class QuotaSizeView(horizon_tables.DataTableView):
     def get_context_data(self, **kwargs):
         # request.user.services_region
         context = super(QuotaSizeView, self).get_context_data(**kwargs)
-        context['title'] = _("%s - Quota Details") \
-            % self.kwargs['size'].title()
+        context['size'] = self.kwargs['size']
+        # NOTE(callumdickinson): Necessary because the title filter
+        # is overloaded in the title block.
+        context['size_titlecase'] = self.kwargs['size'].title()
         return context