/**
* @name updateMetadata
*
* Extends $owner Metdata() function with Authorship values.
*
* @param string $metadata
* @param SiteTree $owner
* @param SiteConfig $config
* @return string
*/
public function updateMetadata(&$metadata, $owner, $config)
{
// variables
// $config = SiteConfig::current_site_config();
// $owner = $this->owner;
$authors = $owner->Authors();
$metadata .= $owner->MarkupHeader('Google+ Authorship');
// Facebook Authors
foreach ($authors as $author) {
if ($author->FacebookProfileID) {
$metadata .= $owner->MarkupFacebook('article:author', $author->FacebookProfileID, false);
break;
}
}
// Google+ Authors
foreach ($authors as $author) {
if ($author->GoogleProfileID) {
$profile = 'https://plus.google.com/' . $author->GoogleProfileID . '/';
$metadata .= $owner->MarkupRel('author', $profile);
// @todo kinda - Google+ does not support multiple authors - break loop
break;
}
}
// Google+ Publisher
if ($config->GoogleProfileID) {
$profile = 'https://plus.google.com/' . $config->GoogleProfileID . '/';
$metadata .= $owner->MarkupRel('publisher', $profile);
}
// return
return $metadata;
}