108 lines
2.7 KiB
PHP
108 lines
2.7 KiB
PHP
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<?php
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namespace Activitypub\Integration;
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use Activitypub\Model\Blog;
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use Activitypub\Collection\Users;
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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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* 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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\add_filter( 'opengraph_metadata', array( self::class, 'add_metadata' ) );
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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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return $prefixes;
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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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// add WebFinger resource
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$metadata['fediverse:creator'] = $user->get_webfinger();
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return $metadata;
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}
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if ( \is_author() ) {
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// Use the Author of the Archive-Page
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$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 $metadata;
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}
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$user = Users::get_by_id( $user_id );
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if ( ! $user || \is_wp_error( $user ) ) {
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return $metadata;
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}
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// add WebFinger resource
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$metadata['fediverse:creator'] = $user->get_webfinger();
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return $metadata;
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}
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/**
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* Output Open Graph <meta> tags in the page header.
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*/
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public static function add_meta_tags() {
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$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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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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