Support for YouTube object blocks

Author: namedgraph

src/main/webapp/static/com/atomgraph/linkeddatahub/xsl/bootstrap/2.3.2/client/block/object/youtube.xsl

@@ -0,0 +1,92 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE xsl:stylesheet [
+    <!ENTITY def    "https://w3id.org/atomgraph/linkeddatahub/default#">
+    <!ENTITY ldh    "https://w3id.org/atomgraph/linkeddatahub#">
+    <!ENTITY ac     "https://w3id.org/atomgraph/client#">
+    <!ENTITY rdf    "http://www.w3.org/1999/02/22-rdf-syntax-ns#">
+    <!ENTITY rdfs   "http://www.w3.org/2000/01/rdf-schema#">
+    <!ENTITY xsd    "http://www.w3.org/2001/XMLSchema#">
+    <!ENTITY acl    "http://www.w3.org/ns/auth/acl#">
+    <!ENTITY ldt    "https://www.w3.org/ns/ldt#">
+    <!ENTITY sd     "http://www.w3.org/ns/sparql-service-description#">
+    <!ENTITY foaf   "http://xmlns.com/foaf/0.1/">
+]>
+<xsl:stylesheet version="3.0"
+xmlns="http://www.w3.org/1999/xhtml"
+xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
+xmlns:ixsl="http://saxonica.com/ns/interactiveXSLT"
+xmlns:prop="http://saxonica.com/ns/html-property"
+xmlns:xhtml="http://www.w3.org/1999/xhtml"
+xmlns:xs="http://www.w3.org/2001/XMLSchema"
+xmlns:map="http://www.w3.org/2005/xpath-functions/map"
+xmlns:json="http://www.w3.org/2005/xpath-functions"
+xmlns:array="http://www.w3.org/2005/xpath-functions/array"
+xmlns:ac="&ac;"
+xmlns:ldh="&ldh;"
+xmlns:rdf="&rdf;"
+xmlns:rdfs="&rdfs;"
+xmlns:acl="&acl;"
+xmlns:ldt="&ldt;"
+xmlns:sd="&sd;"
+xmlns:foaf="&foaf;"
+xmlns:bs2="http://graphity.org/xsl/bootstrap/2.3.2"
+extension-element-prefixes="ixsl"
+exclude-result-prefixes="#all"
+>
+
+    <!-- TEMPLATES -->
+    
+    <!-- object block (RDF resource) -->
+    
+  <xsl:template match="*[@typeof = '&ldh;Object'][descendant::*[@property = '&rdf;value'][starts-with(@resource, 'https://www.youtube.com/watch?v=') or starts-with(@resource, 'https://youtube.com/watch?v=')]]" mode="ldh:RenderRow" as="function(item()?) as map(*)" priority="3">
+        <xsl:param name="container" select="." as="element()"/>
+        <xsl:param name="resource-uri" select="descendant::*[@property = '&rdf;value']/@resource" as="xs:anyURI?"/>
+
+        <xsl:variable name="context" as="map(*)" select="map{
+            'container': $container,
+            'resource-uri': $resource-uri,
+            'block': ancestor::div[contains-token(@class, 'block')][1]
+        }"/>
+
+        <xsl:message>
+            YouTube object: <xsl:value-of select="$resource-uri"/>
+        </xsl:message>
+        
+        <!-- Return the YouTube rendering function with partial application -->
+        <xsl:sequence select="ldh:render-youtube#2($context, ?)"/>
+    </xsl:template>
+
+    <xsl:function name="ldh:render-youtube" as="map(*)" ixsl:updating="yes">
+        <xsl:param name="context" as="map(*)"/>
+        <xsl:param name="ignored" as="item()?" />
+
+        <xsl:variable name="container" select="$context('container')" as="element()"/>
+        <xsl:variable name="resource-uri" select="$context('resource-uri')" as="xs:anyURI"/>
+        
+        <xsl:variable name="video-id" select="
+            if (starts-with($resource-uri, 'https://www.youtube.com/watch?v=')) 
+            then substring-after($resource-uri, 'https://www.youtube.com/watch?v=')
+            else substring-after($resource-uri, 'https://youtube.com/watch?v=')" as="xs:string"/>
+  
+        <xsl:for-each select="$container">
+            <xsl:result-document href="?." method="ixsl:replace-content">
+                <div class="offset2 span7">
+                    <div class="text-center">
+                        <iframe width="560" height="315" 
+                                src="https://www.youtube.com/embed/{$video-id}" 
+                                frameborder="0" 
+                                allowfullscreen="allowfullscreen">
+                        </iframe>
+                    </div>
+                </div>
+            </xsl:result-document>
+        </xsl:for-each>
+
+      <!-- Hide progress bar and remove striped class like the original code -->
+      <xsl:sequence select="ldh:hide-block-progress-bar($context, ())[current-date() lt xs:date('2000-01-01')]"/>
+
+      <!-- Return resolved promise -->
+      <xsl:sequence select="ixsl:resolve($context)"/>
+    </xsl:function>
+
+</xsl:stylesheet>

src/main/webapp/static/com/atomgraph/linkeddatahub/xsl/client.xsl

@@ -111,7 +111,8 @@ extension-element-prefixes="ixsl"
     <xsl:include href="bootstrap/2.3.2/client/block/view.xsl"/>
     <xsl:include href="bootstrap/2.3.2/client/block/chart.xsl"/>
     <xsl:include href="bootstrap/2.3.2/client/block/query.xsl"/>
-    
+    <xsl:include href="bootstrap/2.3.2/client/block/object/youtube.xsl"/>
+
     <xsl:param name="ac:contextUri" as="xs:anyURI"/>
     <xsl:param name="ldt:base" as="xs:anyURI"/>
     <xsl:param name="ldh:requestUri" select="xs:anyURI(ixsl:location())" as="xs:anyURI"/>