# HG changeset patch
# User Brian Neal <bgneal@gmail.com>
# Date 1362850955 21600
# Node ID 560e4fe35bd390943b1ba29f733906972131a297
# Parent  1872c8fca82aef531f469eb54d3df0074897e587
Add a tag to choose slides for home slideshow.

diff -r 1872c8fca82a -r 560e4fe35bd3 core/templatetags/core_tags.py
--- a/core/templatetags/core_tags.py	Sat Feb 16 18:01:30 2013 -0600
+++ b/core/templatetags/core_tags.py	Sat Mar 09 11:42:35 2013 -0600
@@ -4,6 +4,9 @@
 """
 import collections
 import datetime
+import glob
+import os
+import random
 import urllib
 
 from django import template
@@ -220,3 +223,18 @@
     querydict = bits[1]
     args = [arg[1:-1] for arg in bits[2:]]
     return EncodeParamsNode(querydict, args)
+
+
+@register.inclusion_tag('core/slideshow.html')
+def slideshow_images():
+    """Randomly choose images from a pool for a slideshow."""
+
+    slides_dir = os.path.join(settings.STATIC_ROOT, 'slideshow', '*')
+    slides = [os.path.basename(s) for s in glob.glob(slides_dir)]
+    if len(slides) >= 5:
+        slides = random.sample(slides, 5)
+    slides = ['%sslideshow/%s' % (settings.STATIC_URL, s) for s in slides]
+
+    return {
+        'slides': slides,
+    }
diff -r 1872c8fca82a -r 560e4fe35bd3 sg101/templates/core/slideshow.html
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/sg101/templates/core/slideshow.html	Sat Mar 09 11:42:35 2013 -0600
@@ -0,0 +1,3 @@
+{% for slide in slides %}
+   <img src="{{ slide }}" alt="Slideshow Image" />
+{% endfor %}
diff -r 1872c8fca82a -r 560e4fe35bd3 sg101/templates/home.html
--- a/sg101/templates/home.html	Sat Feb 16 18:01:30 2013 -0600
+++ b/sg101/templates/home.html	Sat Mar 09 11:42:35 2013 -0600
@@ -39,11 +39,9 @@
 <h2>Welcome to SurfGuitar101!</h2>
 <div class="span-9">
    <div id="home-slideshow">
-   <img src="{{ STATIC_URL }}slideshow/image-1.jpg" alt="Slideshow Image 1" />
-   <img src="{{ STATIC_URL }}slideshow/image-2.jpg" alt="Slideshow Image 2" />
-   <img src="{{ STATIC_URL }}slideshow/image-3.jpg" alt="Slideshow Image 3" />
-   <img src="{{ STATIC_URL }}slideshow/image-4.jpg" alt="Slideshow Image 4" />
-   <img src="{{ STATIC_URL }}slideshow/image-5.jpg" alt="Slideshow Image 5" />
+   {% cache 600 home_slideshow %}
+      {% slideshow_images %}
+   {% endcache %}
    </div>
 </div>
 <div class="span-10 last">
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