From 19ccffa4ae55daad4d6d7640a2dfc94733986b06 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Sybren=20A=2E=20St=C3=BCvel?= <sybren@stuvel.eu>
Date: Tue, 19 Sep 2017 13:45:10 +0200
Subject: [PATCH] Cache the homepage template context.

This requires pillar-python-sdk c8eec9fa9d8a198df198538a38ca1ad2367bb3e6
or newer.
---
 cloud/__init__.py |  2 ++
 cloud/routes.py   | 22 ++++++++++++++++++----
 2 files changed, 20 insertions(+), 4 deletions(-)

diff --git a/cloud/__init__.py b/cloud/__init__.py
index daa64dd..82f7e81 100644
--- a/cloud/__init__.py
+++ b/cloud/__init__.py
@@ -84,8 +84,10 @@ class CloudExtension(PillarExtension):
         """
 
         from pillar.api.service import signal_user_changed_role
+        from . import routes
 
         signal_user_changed_role.connect(self._user_changed_role)
+        routes.setup_app(app)
 
     def _user_changed_role(self, sender, user: dict):
         from pillar.api import service
diff --git a/cloud/routes.py b/cloud/routes.py
index 8e4f265..d2d4349 100644
--- a/cloud/routes.py
+++ b/cloud/routes.py
@@ -28,6 +28,16 @@ def homepage():
     if current_user.is_anonymous:
         return redirect(url_for('cloud.welcome'))
 
+    return render_template(
+        'homepage.html',
+        api=system_util.pillar_api(),
+        **_homepage_context(),
+    )
+
+
+def _homepage_context() -> dict:
+    """Returns homepage template context variables."""
+
     # Get latest blog posts
     api = system_util.pillar_api()
     latest_posts = Node.all({
@@ -105,13 +115,11 @@ def homepage():
     for node in activity_stream:
         node.url = url_for_node(node=node)
 
-    return render_template(
-        'homepage.html',
+    return dict(
         main_project=main_project,
         latest_posts=latest_posts._items,
         activity_stream=activity_stream,
-        random_featured=random_featured,
-        api=api)
+        random_featured=random_featured)
 
 
 @blueprint.route('/login')
@@ -331,3 +339,9 @@ def billing():
     return render_template(
         'users/settings/billing.html',
         store_user=store_user, groups=groups, title='billing')
+
+
+def setup_app(app):
+    global _homepage_context
+    cached = app.cache.cached(timeout=300)
+    _homepage_context = cached(_homepage_context)