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