laipower/wp-content/plugins/activitypub/integration/class-opengraph.php

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<?php
namespace Activitypub\Integration;
use Activitypub\Model\Blog;
use Activitypub\Collection\Users;
use function Activitypub\is_single_user;
use function Activitypub\is_user_type_disabled;
/**
* Compatibility with the OpenGraph plugin
*
* @see https://wordpress.org/plugins/opengraph/
* @see https://codeberg.org/fediverse/fep/src/branch/main/fep/XXXX/fep-XXXX.md
* @see https://github.com/mastodon/mastodon/pull/30398
*/
class Opengraph {
/**
* Initialize the class, registering WordPress hooks
*/
public static function init() {
if ( ! function_exists( 'opengraph_metadata' ) ) {
\add_action( 'wp_head', array( self::class, 'add_meta_tags' ) );
}
\add_filter( 'opengraph_metadata', array( self::class, 'add_metadata' ) );
}
/**
* Add the ActivityPub prefix to the OpenGraph prefixes.
*
* @param array $prefixes the current prefixes.
*
* @return array the updated prefixes.
*/
public static function add_prefixes( $prefixes ) {
// @todo discuss namespace
$prefixes['fediverse'] = 'https://codeberg.org/fediverse/fep/src/branch/main/fep/XXXX/fep-XXXX.md';
return $prefixes;
}
/**
* Add the ActivityPub metadata to the OpenGraph metadata.
*
* @param array $metadata the current metadata.
*
* @return array the updated metadata.
*/
public static function add_metadata( $metadata ) {
// Always show Blog-User if the Blog is in single user mode
if ( is_single_user() ) {
$user = new Blog();
// add WebFinger resource
$metadata['fediverse:creator'] = $user->get_webfinger();
return $metadata;
}
if ( \is_author() ) {
// Use the Author of the Archive-Page
$user_id = \get_queried_object_id();
} elseif ( \is_singular() ) {
// Use the Author of the Post
$user_id = \get_post_field( 'post_author', \get_queried_object_id() );
} elseif ( ! is_user_type_disabled( 'blog' ) ) {
// Use the Blog-User for any other page, if the Blog-User is not disabled
$user_id = Users::BLOG_USER_ID;
} else {
// Do not add any metadata otherwise
return $metadata;
}
$user = Users::get_by_id( $user_id );
if ( ! $user || \is_wp_error( $user ) ) {
return $metadata;
}
// add WebFinger resource
$metadata['fediverse:creator'] = $user->get_webfinger();
return $metadata;
}
/**
* Output Open Graph <meta> tags in the page header.
*/
public static function add_meta_tags() {
$metadata = apply_filters( 'opengraph_metadata', array() );
foreach ( $metadata as $key => $value ) {
if ( empty( $key ) || empty( $value ) ) {
continue;
}
$value = (array) $value;
foreach ( $value as $v ) {
printf(
'<meta property="%1$s" name="%1$s" content="%2$s" />' . PHP_EOL,
esc_attr( $key ),
esc_attr( $v )
);
}
}
}
}