From 5a17c4c7c479bbbdbed4de3ab65feaaaa9fcf20e Mon Sep 17 00:00:00 2001
From: dakkar <dakkar@thenautilus.net>
Date: Mon, 2 May 2016 16:15:47 +0100
Subject: add images to twitter cards
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won't really work, since Twitter really likes full URIs ☹
---
 templates/du2html.xsl | 11 +++++++++++
 1 file changed, 11 insertions(+)

(limited to 'templates')

diff --git a/templates/du2html.xsl b/templates/du2html.xsl
index 55fdcd7..aca58ba 100644
--- a/templates/du2html.xsl
+++ b/templates/du2html.xsl
@@ -160,6 +160,16 @@
   <link rel="alternate" type="application/atom+xml" href="{$url}feed.{$language}.xml"/>
  </x:template>
 
+ <x:template match="image[contains(concat(' ',normalize-space(@classes),' '),' twitter ')]" mode="twitter-card">
+  <x:variable name="uri-with-slash" select="wc:dst-uri-for(@uri,/document/@source)" />
+  <!-- dst-uri-for appends a / at the end :( -->
+  <meta name="twitter:image" content="{substring($uri-with-slash,1,string-length($uri-with-slash) - 1)}" />
+  <x:if test="@alt">
+   <meta name="twitter:image:alt" content="{@alt}" />
+  </x:if>
+ </x:template>
+ <x:template match="image" mode="twitter-card" priority="-1" />
+
  <!-- qui ce ne freghiamo del @source, tanto viene usata solo per i
       documenti stand-alone -->
 
@@ -177,6 +187,7 @@
     <meta name="twitter:card" content="summary" />
     <meta name="twitter:site" content="@dakkar" />
     <meta name="twitter:title" content="{normalize-space(title)}" />
+    <x:apply-templates select="//image" mode="twitter-card" />
     <meta name="twitter:description">
      <x:attribute name="content">
       <x:choose>
-- 
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