From c5986e3bc647752052780ac277294c83b1fd5e9d Mon Sep 17 00:00:00 2001
From: Trygve Laugstøl <trygvis@inamo.no>
Date: Fri, 6 Jul 2012 19:38:32 +0200
Subject: o Only creating .atom if there has been any new shows, makes
 conditional gets possible.

---
 tv.nrk.no.xsl  |  9 +++------
 update-feed.sh | 24 +++++++++++++++++++++++-
 2 files changed, 26 insertions(+), 7 deletions(-)
 mode change 100644 => 100755 update-feed.sh

diff --git a/tv.nrk.no.xsl b/tv.nrk.no.xsl
index 18d59a9..a825181 100644
--- a/tv.nrk.no.xsl
+++ b/tv.nrk.no.xsl
@@ -5,11 +5,8 @@
 <xsl:output indent="yes"/>
 <xsl:template match="/html">
 <feed>
-  <title>New shows</title>
-  <id>urn:trygvis:tv.nrk.no,recent</id>
-  <!--
-  <updated>2003-12-13T18:30:02Z</updated>
-  -->
+  <title>Recently Sent from NRK</title>
+  <id>urn:trygvis:2012,07,tv.nrk.no,recently-sent</id>
   <xsl:for-each select="//li">
 <xsl:call-template name="li"/>
   </xsl:for-each>
@@ -19,7 +16,7 @@
   <entry>
     <id><xsl:value-of select="a/@href"/></id>
     <!--
-    <id>urn:trygvis:tv.nrk.no,item,<xsl:value-of select='normalize-space(a)'/></id>
+    <id>urn:trygvis:2012,07,tv.nrk.no,item,<xsl:value-of select='normalize-space(a)'/></id>
     -->
     <title><xsl:value-of select='normalize-space(a)'/></title>
     <updated><xsl:value-of select="a/strong/time/@datetime"/></updated>
diff --git a/update-feed.sh b/update-feed.sh
old mode 100644
new mode 100755
index f0a7508..4afd168
--- a/update-feed.sh
+++ b/update-feed.sh
@@ -1,3 +1,25 @@
 #!/bin/bash
 
-curl -s http://tv.nrk.no/listobjects/recentlysent | dos2unix |xmllint --html --dropdtd --xmlout - 2> /dev/null | xmlstarlet tr ./tv.nrk.no.xsl > tv.nrk.no.atom
+set -e
+set -x
+
+checksum() {
+  [ -r $1 ] && md5sum $1 | cut -f 1 -d ' '
+}
+
+fetch() {
+  curl -s http://tv.nrk.no/listobjects/recentlysent | dos2unix | xmllint --html --dropdtd --xmlout - 2> /dev/null > tv.nrk.no.html.new
+
+  if [ -r tv.nrk.no.html -a "`checksum tv.nrk.no.html.new`" == "`checksum tv.nrk.no.html`" ]
+  then
+    rm -f tv.nrk.no.html.new
+    echo "Already up to date."
+    exit 0
+  fi
+
+  mv tv.nrk.no.html.new tv.nrk.no.html
+}
+
+fetch
+
+cat tv.nrk.no.html | xmlstarlet tr ./tv.nrk.no.xsl > tv.nrk.no.atom
-- 
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