Transforming adjacent links to a list using XLST - xslt

Question

I'm looking for some help with XSLT Tranforms.
I'm currently transforming links that match the format:
<link type="button" url="/page.html" text="Do something" />
By using the transform:
<xsl:template match="link">
<a target="_blank" href="{#url}" title="{#text}">
<xsl:if test="#type='button'">
<xsl:attribute name="class">btn</xsl:attribute>
</xsl:if>
<xsl:value-of select="#text" />
</a>
</xsl:template>
Which gives me the output:
<a class="btn" title="Do Something" href="/page.html" target="_blank">Do Something</a>
But now I'm looking to be able to detect when multiple links with the type "button" are grouped together like this:
<link type="button" url="/page.html" text="Do something" />
<link type="button" url="/page.html" text="Do something else" />
And output like so:
<ul class="btns">
<li>Do something</li>
<li>Do something else</li>
</ul>
Can anyone assist on this?
Thanks,
C.

Answer 1

The logic needs to go in the template for the parent of the link elements. Assuming you are using XSLT 2.0 it will be something like this:
<xsl:template match="parent">
<xsl:for-each-group select="*" group-adjacent="node-name()">
<xsl:choose>
<xsl:when test="self::link">
<ul>
<xsl:apply-templates select="current-group()"/>
</ul>
</xsl:when>
<xsl:otherwise>
<xsl:apply-templates select="current-group()"/>
</xsl:otherwise>
</xsl:choose>
</xsl:for-each-group>
</xsl:template>