From c1e67fef8bf81a5f869fa18251c62ba433d5e2f7 Mon Sep 17 00:00:00 2001
From: Jake Howard <git@theorangeone.net>
Date: Thu, 19 Jan 2017 18:30:07 +0000
Subject: [PATCH] Add get image helper

---
 pelicanconf.py                     | 3 ++-
 plugins/filters.py                 | 4 ++++
 theme/templates/extras/header.html | 2 +-
 3 files changed, 7 insertions(+), 2 deletions(-)

diff --git a/pelicanconf.py b/pelicanconf.py
index 17e444f..e3e5a2f 100644
--- a/pelicanconf.py
+++ b/pelicanconf.py
@@ -110,7 +110,8 @@ JINJA_FILTERS = {
     "category_find": filters.category_find,
     "limit": filters.limit,
     "get_title": filters.get_title,
-    "get_html_title": filters.get_html_title
+    "get_html_title": filters.get_html_title,
+    "get_image": filters.get_image
 }
 
 JINJA_ENVIRONMENT = {
diff --git a/plugins/filters.py b/plugins/filters.py
index b52296f..a01acad 100644
--- a/plugins/filters.py
+++ b/plugins/filters.py
@@ -31,3 +31,7 @@ def get_title(instance):
 
 def get_html_title(instance):
     return get_attribute(instance, 'html_title') or get_title(instance)
+
+
+def get_image(instance):
+    return get_attribute(instance, 'image') or (hasattr(instance, 'page') and get_attribute(instance.page, 'name')) or ''
diff --git a/theme/templates/extras/header.html b/theme/templates/extras/header.html
index d590185..93dc8de 100644
--- a/theme/templates/extras/header.html
+++ b/theme/templates/extras/header.html
@@ -1,4 +1,4 @@
-<header id="header" class="bg-primary image" data-image="{{ instance.image or (instance.page and instance.page.image) }}">
+<header id="header" class="bg-primary image" data-image="{{ instance|get_image }}">
   <div class="header-content">
     <div class="header-content-inner">
       <h1>{{ instance|get_title }}</h1>