/**
* @name updateMetadata
*
* Updates metadata with icons.
*
* @param SiteConfig $config
* @param SiteTree $owner
* @param $metadata
* @return void
*/
public function updateMetadata(SiteConfig $config, SiteTree $owner, &$metadata)
{
// decode into array
$data = json_decode($owner->OpenGraphData, true);
// check for data or throw an error
if ($data) {
// check if off
if ($data['og:type'] !== 'off') {
// Header
$metadata .= $owner->MarkupComment('Open Graph');
// Type
$metadata .= $owner->MarkupOpenGraph('og:type', $data['og:type']);
// URL
$metadata .= $owner->MarkupOpenGraph('og:url', $owner->AbsoluteLink());
// Site Name
$siteName = $data['og:site_name'] ? $data['og:site_name'] : $config->Title;
$metadata .= $owner->MarkupOpenGraph('og:site_name', $siteName, true);
// Title
$title = $data['og:title'] ? $data['og:title'] : $owner->Title;
$metadata .= $owner->MarkupOpenGraph('og:title', $title, true);
// Description
$description = $data['og:description'] ? $data['og:description'] : $owner->GenerateDescription();
$metadata .= $owner->MarkupOpenGraph('og:description', $description, true);
// Image
if ($owner->OpenGraphImage()->exists()) {
$metadata .= $owner->MarkupOpenGraph('og:image', $owner->OpenGraphImage()->getAbsoluteURL());
}
} else {
// OFF
$metadata .= $owner->MarkupComment('Open Graph [ off ]');
}
} else {
// ERROR
$metadata .= $owner->MarkupComment('Open Graph [ error ]');
}
}