Add an RSS conversion stylesheet for dilbert.com

Since June 18, 2013 dilbert.com strips are not accessible anymore
directly from the RSS feed, this message is displayed instead:

  Dilbert readers - Please visit Dilbert.com to read this feature. Due
  to changes with our feeds, we are now making this RSS feed a link to
  Dilbert.com.

How unhandy is that, was it because of a management decision?
Maybe a parody dilbert strip is needed about this issue...

diff --git a/rss_converter_dilbert.com.xsl b/rss_converter_dilbert.com.xsl
new file mode 100644 (file)
index 0000000..c686407
--- /dev/null
+++ b/rss_converter_dilbert.com.xsl
@@ -0,0 +1,88 @@
+<!--
+  Stylesheet to convert Dilbert daily strips to RSS.
+
+  Copyright (C) 2013  Antonio Ospite <ospite@studenti.unina.it>
+
+  This file is part of tweeper.
+
+  This program is free software: you can redistribute it and/or modify
+  it under the terms of the GNU General Public License as published by
+  the Free Software Foundation, either version 3 of the License, or
+  (at your option) any later version.
+
+  This program is distributed in the hope that it will be useful,
+  but WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+  GNU General Public License for more details.
+
+  You should have received a copy of the GNU General Public License
+  along with this program.  If not, see <http://www.gnu.org/licenses/>.
+-->
+
+<!--
+  Since June 18, 2013 dilbert.com strips are not accessible anymore
+  directly from the RSS feed, this message is displayed instead:
+
+    Dilbert readers - Please visit Dilbert.com to read this feature. Due
+    to changes with our feeds, we are now making this RSS feed a link to
+    Dilbert.com.
+
+  How unhandy is that, was it because of a management decision?
+  Maybe a parody dilbert strip is needed about this issue...
+-->
+
+<xsl:stylesheet version="1.0"
+    xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
+    xmlns:php="http://php.net/xsl"
+    xsl:extension-element-prefixes="php">
+
+    <xsl:output method="xml" indent="yes"/>
+
+    <xsl:variable name="BaseURL" select="concat('http://', //meta[@property='og:site_name']/@content)"/>
+
+    <xsl:template match="//a[@id='strip_zoom']">
+        <xsl:variable name="picture-id" select="substring-after(./@href, '#')"/>
+        <xsl:variable name="picture-element" select="//div[@id=$picture-id]/img"/>
+        <xsl:variable name="picture-print-url" select="php:functionString('str_replace', 'zoom', 'print', $picture-element/@src)"/>
+        <item>
+            <title>
+                <xsl:value-of select="$picture-element/@title"/>
+            </title>
+            <link>
+                <xsl:value-of select="concat($BaseURL, $picture-element/@src)"/>
+            </link>
+            <pubDate>
+                <xsl:value-of select="php:functionString('str_to_gmdate', substring-after($picture-id, 'strip_enlarged_'))"/>
+            </pubDate>
+            <description>
+                <xsl:text disable-output-escaping="yes">&lt;![CDATA[</xsl:text>
+                <img src="{$picture-print-url}" />
+                <xsl:text disable-output-escaping="yes">]]&gt;</xsl:text>
+            </description>
+        </item>
+    </xsl:template>
+
+    <xsl:template match="/">
+
+        <rss version="2.0">
+            <channel>
+                <generator>Tweeper</generator>
+                <title>
+                    <xsl:value-of select="//meta[@property='og:title']/@content"/>
+                </title>
+                <link>
+                    <xsl:value-of select="$BaseURL"/>
+                </link>
+                <description>
+                    <xsl:value-of select="//meta[@property='og:description']/@content"/>
+                </description>
+                <image>
+                    <url>
+                        <xsl:value-of select="//meta[@property='og:image']/@content"/>
+                    </url>
+                </image>
+                <xsl:apply-templates select="//a[@id='strip_zoom']"/>
+            </channel>
+        </rss>
+    </xsl:template>
+</xsl:stylesheet>