/**
* Updates metadata fields.
*
* @param SiteConfig $config
* @param SiteTree $owner
* @param string $metadata
*
* @return void
*/
public function updateMetadata(SiteConfig $config, SiteTree $owner, &$metadata)
{
// metadata
$metadata .= $owner->MarkupComment('Metadata');
// charset
if ($config->CharsetEnabled()) {
$metadata .= '<meta charset="' . $config->Charset() . '" />' . PHP_EOL;
}
// canonical
if ($config->CanonicalEnabled()) {
$metadata .= $owner->MarkupLink('canonical', $owner->AbsoluteLink());
}
// title
if ($config->TitleEnabled()) {
$metadata .= '<title>' . $owner->encodeContent($owner->GenerateTitle(), $config->Charset()) . '</title>' . PHP_EOL;
}
// description
if ($description = $owner->GenerateDescription()) {
$metadata .= $owner->MarkupMeta('description', $description, $config->Charset());
}
// extra metadata
if ($config->ExtraMetaEnabled()) {
$metadata .= $owner->MarkupComment('Extra Metadata');
$metadata .= $owner->GenerateExtraMeta();
}
}