From b6d5a749f1604ed3323aff8e27ca376dc71d4973 Mon Sep 17 00:00:00 2001
From: Tatiana Ovchinnikova <t.v.ovtchinnikova@gmail.com>
Date: Fri, 7 Nov 2014 12:26:04 +0300
Subject: [PATCH] 'Stack Template' tab for Heat Stack Details page

Once you launch a stack from any template source (using raw data
or template file), there is no possibility to check this template
later from Horizon. This patch set adds 'Stack Template' tab to
Stack Details page.

Partially implements blueprint: heat-ui-improvement

Change-Id: I27fb687829f9c060ea55d81bcc0344a6e782da06
---
 .../dashboards/project/stacks/tabs.py           | 16 +++++++++++++++-
 .../templates/stacks/_stack_template.html       |  8 ++++++++
 .../dashboards/project/stacks/views.py          | 17 ++++++++++++++++-
 requirements.txt                                |  1 +
 4 files changed, 40 insertions(+), 2 deletions(-)
 create mode 100644 openstack_dashboard/dashboards/project/stacks/templates/stacks/_stack_template.html

diff --git a/openstack_dashboard/dashboards/project/stacks/tabs.py b/openstack_dashboard/dashboards/project/stacks/tabs.py
index 53c698e9f0..f21ff12bd5 100644
--- a/openstack_dashboard/dashboards/project/stacks/tabs.py
+++ b/openstack_dashboard/dashboards/project/stacks/tabs.py
@@ -139,10 +139,24 @@ class StackResourcesTab(tabs.Tab):
                     request, data=resources, stack=stack), }
 
 
+class StackTemplateTab(tabs.Tab):
+    name = _("Template")
+    slug = "stack_template"
+    template_name = "project/stacks/_stack_template.html"
+
+    def allowed(self, request):
+        return policy.check(
+            (("orchestration", "cloudformation:DescribeStacks"),),
+            request)
+
+    def get_context_data(self, request):
+        return {"stack_template": self.tab_group.kwargs['stack_template']}
+
+
 class StackDetailTabs(tabs.TabGroup):
     slug = "stack_details"
     tabs = (StackTopologyTab, StackOverviewTab, StackResourcesTab,
-            StackEventsTab)
+            StackEventsTab, StackTemplateTab)
     sticky = True
 
 
diff --git a/openstack_dashboard/dashboards/project/stacks/templates/stacks/_stack_template.html b/openstack_dashboard/dashboards/project/stacks/templates/stacks/_stack_template.html
new file mode 100644
index 0000000000..085c75fe7a
--- /dev/null
+++ b/openstack_dashboard/dashboards/project/stacks/templates/stacks/_stack_template.html
@@ -0,0 +1,8 @@
+{% load i18n sizeformat %}
+
+<h3>{% trans "Stack Template" %}</h3>
+
+<div class="status row detail">
+  <pre>{{ stack_template }}
+  </pre>
+</div>
diff --git a/openstack_dashboard/dashboards/project/stacks/views.py b/openstack_dashboard/dashboards/project/stacks/views.py
index 53b9bc598c..729aa7010e 100644
--- a/openstack_dashboard/dashboards/project/stacks/views.py
+++ b/openstack_dashboard/dashboards/project/stacks/views.py
@@ -14,6 +14,8 @@ import json
 import logging
 from operator import attrgetter
 
+import yaml
+
 from django.core.urlresolvers import reverse
 from django.core.urlresolvers import reverse_lazy
 from django.http import HttpResponse  # noqa
@@ -216,9 +218,22 @@ class DetailView(tabs.TabView):
             msg = _("Unable to retrieve stack.")
             exceptions.handle(request, msg, redirect=self.get_redirect_url())
 
+    @memoized.memoized_method
+    def get_template(self, request, **kwargs):
+        try:
+            stack_template = api.heat.template_get(
+                request,
+                kwargs['stack_id'])
+            return yaml.safe_dump(stack_template, indent=2)
+        except Exception:
+            msg = _("Unable to retrieve stack template.")
+            exceptions.handle(request, msg, redirect=self.get_redirect_url())
+
     def get_tabs(self, request, **kwargs):
         stack = self.get_data(request, **kwargs)
-        return self.tab_group_class(request, stack=stack, **kwargs)
+        stack_template = self.get_template(request, **kwargs)
+        return self.tab_group_class(
+            request, stack=stack, stack_template=stack_template, **kwargs)
 
     @staticmethod
     def get_redirect_url():
diff --git a/requirements.txt b/requirements.txt
index f69ca45300..8076b5be48 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -38,6 +38,7 @@ python-saharaclient>=0.7.5
 python-swiftclient>=2.2.0
 python-troveclient>=1.0.7
 pytz
+PyYAML>=3.1.0
 six>=1.7.0
 xstatic>=1.0.0  # MIT License
 xstatic-angular>=1.2.1.1  # MIT License