796 lines
21 KiB
PHP
796 lines
21 KiB
PHP
<?php
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namespace Activitypub\Transformer;
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use WP_Post;
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use Activitypub\Shortcodes;
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use Activitypub\Model\Blog_User;
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use Activitypub\Transformer\Base;
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use Activitypub\Collection\Users;
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use Activitypub\Activity\Base_Object;
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use function Activitypub\esc_hashtag;
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use function Activitypub\is_single_user;
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use function Activitypub\get_rest_url_by_path;
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use function Activitypub\site_supports_blocks;
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/**
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* WordPress Post Transformer
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*
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* The Post Transformer is responsible for transforming a WP_Post object into different other
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* Object-Types.
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*
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* Currently supported are:
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*
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* - Activitypub\Activity\Base_Object
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*/
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class Post extends Base {
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/**
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* Returns the ID of the WordPress Post.
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*
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* @return int The ID of the WordPress Post
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*/
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public function get_wp_user_id() {
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return $this->wp_object->post_author;
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}
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/**
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* Change the User-ID of the WordPress Post.
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*
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* @return int The User-ID of the WordPress Post
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*/
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public function change_wp_user_id( $user_id ) {
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$this->wp_object->post_author = $user_id;
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return $this;
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}
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/**
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* Transforms the WP_Post object to an ActivityPub Object
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*
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* @see \Activitypub\Activity\Base_Object
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*
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* @return \Activitypub\Activity\Base_Object The ActivityPub Object
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*/
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public function to_object() {
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$post = $this->wp_object;
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$object = parent::to_object();
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$published = \strtotime( $post->post_date_gmt );
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$object->set_published( \gmdate( 'Y-m-d\TH:i:s\Z', $published ) );
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$updated = \strtotime( $post->post_modified_gmt );
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if ( $updated > $published ) {
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$object->set_updated( \gmdate( 'Y-m-d\TH:i:s\Z', $updated ) );
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}
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$object->set_content_map(
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array(
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$this->get_locale() => $this->get_content(),
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)
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);
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$path = sprintf( 'users/%d/followers', intval( $post->post_author ) );
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$object->set_to(
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array(
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'https://www.w3.org/ns/activitystreams#Public',
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get_rest_url_by_path( $path ),
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)
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);
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return $object;
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}
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/**
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* Returns the ID of the Post.
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*
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* @return string The Posts ID.
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*/
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public function get_id() {
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return $this->get_url();
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}
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/**
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* Returns the URL of the Post.
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*
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* @return string The Posts URL.
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*/
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public function get_url() {
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$post = $this->wp_object;
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if ( 'trash' === get_post_status( $post ) ) {
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$permalink = \get_post_meta( $post->ID, 'activitypub_canonical_url', true );
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} else {
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$permalink = \get_permalink( $post );
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}
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return \esc_url( $permalink );
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}
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/**
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* Returns the User-URL of the Author of the Post.
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*
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* If `single_user` mode is enabled, the URL of the Blog-User is returned.
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*
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* @return string The User-URL.
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*/
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protected function get_attributed_to() {
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$blog_user = new Blog_User();
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if ( is_single_user() ) {
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return $blog_user->get_url();
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}
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$user = Users::get_by_id( $this->wp_object->post_author );
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if ( $user && ! is_wp_error( $user ) ) {
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return $user->get_url();
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}
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return $blog_user->get_url();
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}
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/**
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* Generates all Media Attachments for a Post.
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*
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* @return array The Attachments.
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*/
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protected function get_attachment() {
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// Once upon a time we only supported images, but we now support audio/video as well.
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// We maintain the image-centric naming for backwards compatibility.
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$max_media = \intval( \apply_filters( 'activitypub_max_image_attachments', \get_option( 'activitypub_max_image_attachments', ACTIVITYPUB_MAX_IMAGE_ATTACHMENTS ) ) );
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if ( site_supports_blocks() && \has_blocks( $this->wp_object->post_content ) ) {
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$media = $this->get_block_attachments( $max_media );
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} else {
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$media = $this->get_classic_editor_images( $max_media );
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}
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$unique_ids = \array_unique( \array_column( $media, 'id' ) );
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$media = \array_intersect_key( $media, $unique_ids );
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$media = \array_slice( $media, 0, $max_media );
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return \array_filter( \array_map( array( self::class, 'wp_attachment_to_activity_attachment' ), $media ) );
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}
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/**
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* Get media attachments from blocks. They will be formatted as ActivityPub attachments, not as WP attachments.
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*
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* @param int $max_media The maximum number of attachments to return.
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*
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* @return array The attachments.
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*/
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protected function get_block_attachments( $max_media ) {
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// max media can't be negative or zero
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if ( $max_media <= 0 ) {
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return array();
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}
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$id = $this->wp_object->ID;
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$media = array(
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'image' => array(),
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'audio' => array(),
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'video' => array(),
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);
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// list post thumbnail first if this post has one
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if ( \function_exists( 'has_post_thumbnail' ) && \has_post_thumbnail( $id ) ) {
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$media['image'][] = array( 'id' => \get_post_thumbnail_id( $id ) );
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}
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if ( $max_media > 0 ) {
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$blocks = \parse_blocks( $this->wp_object->post_content );
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$media = self::get_media_from_blocks( $blocks, $media );
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}
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return self::filter_media_by_object_type( $media, \get_post_format( $this->wp_object ) );
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}
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/**
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* Get image attachments from the classic editor.
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* This is imperfect as the contained images aren't necessarily the
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* same as the attachments.
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*
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* @param int $max_images The maximum number of images to return.
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*
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* @return array The attachment IDs.
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*/
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protected function get_classic_editor_image_attachments( $max_images ) {
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// max images can't be negative or zero
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if ( $max_images <= 0 ) {
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return array();
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}
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$images = array();
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$query = new \WP_Query(
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array(
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'post_parent' => $this->wp_object->ID,
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'post_status' => 'inherit',
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'post_type' => 'attachment',
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'post_mime_type' => 'image',
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'order' => 'ASC',
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'orderby' => 'menu_order ID',
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'posts_per_page' => $max_images,
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)
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);
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foreach ( $query->get_posts() as $attachment ) {
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if ( ! \in_array( $attachment->ID, $images, true ) ) {
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$images[] = array( 'id' => $attachment->ID );
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}
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}
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return $images;
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}
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/**
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* Get image embeds from the classic editor by parsing HTML.
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*
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* @param int $max_images The maximum number of images to return.
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*
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* @return array The attachments.
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*/
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protected function get_classic_editor_image_embeds( $max_images ) {
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// if someone calls that function directly, bail
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if ( ! \class_exists( '\WP_HTML_Tag_Processor' ) ) {
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return array();
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}
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// max images can't be negative or zero
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if ( $max_images <= 0 ) {
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return array();
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}
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$images = array();
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$base = \wp_get_upload_dir()['baseurl'];
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$content = \get_post_field( 'post_content', $this->wp_object );
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$tags = new \WP_HTML_Tag_Processor( $content );
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// This linter warning is a false positive - we have to
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// re-count each time here as we modify $images.
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// phpcs:ignore Squiz.PHP.DisallowSizeFunctionsInLoops.Found
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while ( $tags->next_tag( 'img' ) && ( \count( $images ) < $max_images ) ) {
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$src = $tags->get_attribute( 'src' );
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// If the img source is in our uploads dir, get the
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// associated ID. Note: if there's a -500x500
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// type suffix, we remove it, but we try the original
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// first in case the original image is actually called
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// that. Likewise, we try adding the -scaled suffix for
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// the case that this is a small version of an image
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// that was big enough to get scaled down on upload:
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// https://make.wordpress.org/core/2019/10/09/introducing-handling-of-big-images-in-wordpress-5-3/
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if ( null !== $src && \str_starts_with( $src, $base ) ) {
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$img_id = \attachment_url_to_postid( $src );
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if ( 0 === $img_id ) {
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$count = 0;
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$src = preg_replace( '/-(?:\d+x\d+)(\.[a-zA-Z]+)$/', '$1', $src, 1, $count );
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if ( $count > 0 ) {
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$img_id = \attachment_url_to_postid( $src );
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}
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}
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if ( 0 === $img_id ) {
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$src = preg_replace( '/(\.[a-zA-Z]+)$/', '-scaled$1', $src );
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$img_id = \attachment_url_to_postid( $src );
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}
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if ( 0 !== $img_id ) {
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$images[] = array(
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'id' => $img_id,
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'alt' => $tags->get_attribute( 'alt' ),
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);
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}
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}
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}
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return $images;
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}
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/**
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* Get post images from the classic editor.
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* Note that audio/video attachments are only supported in the block editor.
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*
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* @param int $max_images The maximum number of images to return.
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*
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* @return array The attachments.
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*/
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protected function get_classic_editor_images( $max_images ) {
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// max images can't be negative or zero
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if ( $max_images <= 0 ) {
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return array();
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}
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$id = $this->wp_object->ID;
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$images = array();
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// list post thumbnail first if this post has one
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if ( \function_exists( 'has_post_thumbnail' ) && \has_post_thumbnail( $id ) ) {
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$images[] = \get_post_thumbnail_id( $id );
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}
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if ( \count( $images ) < $max_images ) {
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if ( \class_exists( '\WP_HTML_Tag_Processor' ) ) {
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$images = \array_merge( $images, $this->get_classic_editor_image_embeds( $max_images ) );
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} else {
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$images = \array_merge( $images, $this->get_classic_editor_image_attachments( $max_images ) );
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}
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}
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return $images;
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}
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/**
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* Recursively get media IDs from blocks.
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* @param array $blocks The blocks to search for media IDs
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* @param array $media The media IDs to append new IDs to
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* @param int $max_media The maximum number of media to return.
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*
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* @return array The image IDs.
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*/
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protected static function get_media_from_blocks( $blocks, $media ) {
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foreach ( $blocks as $block ) {
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// recurse into inner blocks
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if ( ! empty( $block['innerBlocks'] ) ) {
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$media = self::get_media_from_blocks( $block['innerBlocks'], $media );
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}
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switch ( $block['blockName'] ) {
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case 'core/image':
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case 'core/cover':
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if ( ! empty( $block['attrs']['id'] ) ) {
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$alt = '';
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$check = preg_match( '/<img.*?alt=[\"\'](.*?)[\"\'].*>/i', $block['innerHTML'], $match );
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if ( $check ) {
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$alt = $match[1];
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}
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$media['image'][] = array(
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'id' => $block['attrs']['id'],
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'alt' => $alt,
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);
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}
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break;
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case 'core/audio':
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if ( ! empty( $block['attrs']['id'] ) ) {
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$media['audio'][] = array( 'id' => $block['attrs']['id'] );
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}
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break;
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case 'core/video':
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case 'videopress/video':
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if ( ! empty( $block['attrs']['id'] ) ) {
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$media['video'][] = array( 'id' => $block['attrs']['id'] );
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}
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break;
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case 'jetpack/slideshow':
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case 'jetpack/tiled-gallery':
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if ( ! empty( $block['attrs']['ids'] ) ) {
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$media['image'] = array_merge(
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$media['image'],
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array_map(
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function ( $id ) {
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return array( 'id' => $id );
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},
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$block['attrs']['ids']
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)
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);
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}
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break;
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case 'jetpack/image-compare':
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if ( ! empty( $block['attrs']['beforeImageId'] ) ) {
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$media['image'][] = array( 'id' => $block['attrs']['beforeImageId'] );
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}
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if ( ! empty( $block['attrs']['afterImageId'] ) ) {
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$media['image'][] = array( 'id' => $block['attrs']['afterImageId'] );
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}
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break;
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}
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}
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return $media;
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}
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/**
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* Filter media IDs by object type.
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*
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* @param array $media The media array grouped by type.
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* @param array $type The object type.
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*
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* @return array The filtered media IDs.
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*/
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protected static function filter_media_by_object_type( $media, $type ) {
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$type = \apply_filters( 'filter_media_by_object_type', \strtolower( $type ) );
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if ( ! empty( $media[ $type ] ) ) {
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return $media[ $type ];
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}
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return array_merge( array(), ...array_values( $media ) );
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}
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/**
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* Converts a WordPress Attachment to an ActivityPub Attachment.
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*
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* @param array $media The Attachment array.
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*
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* @return array The ActivityPub Attachment.
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*/
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public static function wp_attachment_to_activity_attachment( $media ) {
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$id = $media['id'];
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$attachment = array();
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$mime_type = \get_post_mime_type( $id );
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$mime_type_parts = \explode( '/', $mime_type );
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// switching on image/audio/video
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switch ( $mime_type_parts[0] ) {
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case 'image':
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$image_size = 'full';
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/**
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* Filter the image URL returned for each post.
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*
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* @param array|false $thumbnail The image URL, or false if no image is available.
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* @param int $id The attachment ID.
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* @param string $image_size The image size to retrieve. Set to 'full' by default.
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*/
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$thumbnail = apply_filters(
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'activitypub_get_image',
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self::get_wordpress_attachment( $id, $image_size ),
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$id,
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$image_size
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);
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if ( $thumbnail ) {
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$image = array(
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'type' => 'Image',
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'url' => \esc_url( $thumbnail[0] ),
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'mediaType' => \esc_attr( $mime_type ),
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);
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if ( ! empty( $media['alt'] ) ) {
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$image['name'] = \esc_attr( $media['alt'] );
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} else {
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$alt = \get_post_meta( $id, '_wp_attachment_image_alt', true );
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if ( $alt ) {
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$image['name'] = \esc_attr( $alt );
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}
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}
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$attachment = $image;
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}
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break;
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case 'audio':
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case 'video':
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$attachment = array(
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'type' => 'Document',
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'mediaType' => \esc_attr( $mime_type ),
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'url' => \esc_url( \wp_get_attachment_url( $id ) ),
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'name' => \esc_attr( \get_the_title( $id ) ),
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);
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$meta = wp_get_attachment_metadata( $id );
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// height and width for videos
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if ( isset( $meta['width'] ) && isset( $meta['height'] ) ) {
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$attachment['width'] = \esc_attr( $meta['width'] );
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$attachment['height'] = \esc_attr( $meta['height'] );
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}
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// @todo: add `icon` support for audio/video attachments. Maybe use post thumbnail?
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break;
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}
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return \apply_filters( 'activitypub_attachment', $attachment, $id );
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}
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/**
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* Return details about an image attachment.
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*
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* @param int $id The attachment ID.
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* @param string $image_size The image size to retrieve. Set to 'full' by default.
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*
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* @return array|false Array of image data, or boolean false if no image is available.
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*/
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protected static function get_wordpress_attachment( $id, $image_size = 'full' ) {
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/**
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* Hook into the image retrieval process. Before image retrieval.
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*
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* @param int $id The attachment ID.
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* @param string $image_size The image size to retrieve. Set to 'full' by default.
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*/
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do_action( 'activitypub_get_image_pre', $id, $image_size );
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$image = \wp_get_attachment_image_src( $id, $image_size );
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/**
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* Hook into the image retrieval process. After image retrieval.
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*
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* @param int $id The attachment ID.
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* @param string $image_size The image size to retrieve. Set to 'full' by default.
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*/
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do_action( 'activitypub_get_image_post', $id, $image_size );
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return $image;
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}
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|
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/**
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* Returns the ActivityStreams 2.0 Object-Type for a Post based on the
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* settings and the Post-Type.
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*
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* @see https://www.w3.org/TR/activitystreams-vocabulary/#activity-types
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*
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* @return string The Object-Type.
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*/
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protected function get_type() {
|
|
$post_format_setting = \get_option( 'activitypub_object_type', ACTIVITYPUB_DEFAULT_OBJECT_TYPE );
|
|
|
|
if ( 'wordpress-post-format' !== $post_format_setting ) {
|
|
return \ucfirst( $post_format_setting );
|
|
}
|
|
|
|
$has_title = post_type_supports( $this->wp_object->post_type, 'title' );
|
|
|
|
if ( ! $has_title ) {
|
|
return 'Note';
|
|
}
|
|
|
|
// Default to Article.
|
|
$object_type = 'Article';
|
|
$post_format = 'standard';
|
|
|
|
if ( \get_theme_support( 'post-formats' ) ) {
|
|
$post_format = \get_post_format( $this->wp_object );
|
|
}
|
|
|
|
$post_type = \get_post_type( $this->wp_object );
|
|
switch ( $post_type ) {
|
|
case 'post':
|
|
switch ( $post_format ) {
|
|
case 'aside':
|
|
case 'status':
|
|
case 'quote':
|
|
case 'note':
|
|
case 'gallery':
|
|
case 'image':
|
|
case 'video':
|
|
case 'audio':
|
|
$object_type = 'Note';
|
|
break;
|
|
default:
|
|
$object_type = 'Article';
|
|
break;
|
|
}
|
|
break;
|
|
case 'page':
|
|
$object_type = 'Page';
|
|
break;
|
|
default:
|
|
$object_type = 'Article';
|
|
break;
|
|
}
|
|
|
|
return $object_type;
|
|
}
|
|
|
|
/**
|
|
* Returns a list of Mentions, used in the Post.
|
|
*
|
|
* @see https://docs.joinmastodon.org/spec/activitypub/#Mention
|
|
*
|
|
* @return array The list of Mentions.
|
|
*/
|
|
protected function get_cc() {
|
|
$cc = array();
|
|
|
|
$mentions = $this->get_mentions();
|
|
if ( $mentions ) {
|
|
foreach ( $mentions as $url ) {
|
|
$cc[] = $url;
|
|
}
|
|
}
|
|
|
|
return $cc;
|
|
}
|
|
|
|
/**
|
|
* Returns a list of Tags, used in the Post.
|
|
*
|
|
* This includes Hash-Tags and Mentions.
|
|
*
|
|
* @return array The list of Tags.
|
|
*/
|
|
protected function get_tag() {
|
|
$tags = array();
|
|
|
|
$post_tags = \get_the_tags( $this->wp_object->ID );
|
|
if ( $post_tags ) {
|
|
foreach ( $post_tags as $post_tag ) {
|
|
$tag = array(
|
|
'type' => 'Hashtag',
|
|
'href' => \esc_url( \get_tag_link( $post_tag->term_id ) ),
|
|
'name' => esc_hashtag( $post_tag->name ),
|
|
);
|
|
$tags[] = $tag;
|
|
}
|
|
}
|
|
|
|
$mentions = $this->get_mentions();
|
|
if ( $mentions ) {
|
|
foreach ( $mentions as $mention => $url ) {
|
|
$tag = array(
|
|
'type' => 'Mention',
|
|
'href' => \esc_url( $url ),
|
|
'name' => \esc_html( $mention ),
|
|
);
|
|
$tags[] = $tag;
|
|
}
|
|
}
|
|
|
|
return $tags;
|
|
}
|
|
|
|
/**
|
|
* Returns the summary for the ActivityPub Item.
|
|
*
|
|
* The summary will be generated based on the user settings and only if the
|
|
* object type is not set to `note`.
|
|
*
|
|
* @return string|null The summary or null if the object type is `note`.
|
|
*/
|
|
protected function get_summary() {
|
|
if ( 'Note' === $this->get_type() ) {
|
|
return null;
|
|
}
|
|
|
|
$content = \get_post_field( 'post_content', $this->wp_object->ID );
|
|
$content = \html_entity_decode( $content );
|
|
$content = \wp_strip_all_tags( $content );
|
|
$content = \trim( $content );
|
|
$content = \preg_replace( '/\R+/m', "\n\n", $content );
|
|
$content = \preg_replace( '/[\r\t]/', '', $content );
|
|
|
|
$excerpt_more = \apply_filters( 'activitypub_excerpt_more', '[...]' );
|
|
$length = 500;
|
|
$length = $length - strlen( $excerpt_more );
|
|
|
|
if ( \strlen( $content ) > $length ) {
|
|
$content = \wordwrap( $content, $length, '</activitypub-summary>' );
|
|
$content = \explode( '</activitypub-summary>', $content, 2 );
|
|
$content = $content[0];
|
|
}
|
|
|
|
return $content . ' ' . $excerpt_more;
|
|
}
|
|
|
|
/**
|
|
* Returns the title for the ActivityPub Item.
|
|
*
|
|
* The title will be generated based on the user settings and only if the
|
|
* object type is not set to `note`.
|
|
*
|
|
* @return string|null The title or null if the object type is `note`.
|
|
*/
|
|
protected function get_name() {
|
|
if ( 'Note' === $this->get_type() ) {
|
|
return null;
|
|
}
|
|
|
|
$title = \get_the_title( $this->wp_object->ID );
|
|
|
|
if ( $title ) {
|
|
return \wp_strip_all_tags(
|
|
\html_entity_decode(
|
|
$title
|
|
)
|
|
);
|
|
}
|
|
|
|
return null;
|
|
}
|
|
|
|
/**
|
|
* Returns the content for the ActivityPub Item.
|
|
*
|
|
* The content will be generated based on the user settings.
|
|
*
|
|
* @return string The content.
|
|
*/
|
|
protected function get_content() {
|
|
global $post;
|
|
|
|
/**
|
|
* Provides an action hook so plugins can add their own hooks/filters before AP content is generated.
|
|
*
|
|
* Example: if a plugin adds a filter to `the_content` to add a button to the end of posts, it can also remove that filter here.
|
|
*
|
|
* @param WP_Post $post The post object.
|
|
*/
|
|
do_action( 'activitypub_before_get_content', $post );
|
|
|
|
// phpcs:ignore WordPress.WP.GlobalVariablesOverride.Prohibited
|
|
$post = $this->wp_object;
|
|
$content = $this->get_post_content_template();
|
|
|
|
// Register our shortcodes just in time.
|
|
Shortcodes::register();
|
|
// Fill in the shortcodes.
|
|
setup_postdata( $post );
|
|
$content = do_shortcode( $content );
|
|
wp_reset_postdata();
|
|
|
|
$content = \wpautop( $content );
|
|
$content = \preg_replace( '/[\n\r\t]/', '', $content );
|
|
$content = \trim( $content );
|
|
|
|
$content = \apply_filters( 'activitypub_the_content', $content, $post );
|
|
|
|
// Don't need these any more, should never appear in a post.
|
|
Shortcodes::unregister();
|
|
|
|
return $content;
|
|
}
|
|
|
|
/**
|
|
* Gets the template to use to generate the content of the activitypub item.
|
|
*
|
|
* @return string The Template.
|
|
*/
|
|
protected function get_post_content_template() {
|
|
$type = \get_option( 'activitypub_post_content_type', 'content' );
|
|
|
|
switch ( $type ) {
|
|
case 'excerpt':
|
|
$template = "[ap_excerpt]\n\n[ap_permalink type=\"html\"]";
|
|
break;
|
|
case 'title':
|
|
$template = "<h2>[ap_title]</h2>\n\n[ap_permalink type=\"html\"]";
|
|
break;
|
|
case 'content':
|
|
$template = "[ap_content]\n\n[ap_permalink type=\"html\"]\n\n[ap_hashtags]";
|
|
break;
|
|
default:
|
|
$template = \get_option( 'activitypub_custom_post_content', ACTIVITYPUB_CUSTOM_POST_CONTENT );
|
|
break;
|
|
}
|
|
|
|
$post_format_setting = \get_option( 'activitypub_object_type', ACTIVITYPUB_DEFAULT_OBJECT_TYPE );
|
|
|
|
if ( 'wordpress-post-format' === $post_format_setting ) {
|
|
$template = '[ap_content]';
|
|
}
|
|
|
|
return apply_filters( 'activitypub_object_content_template', $template, $this->wp_object );
|
|
}
|
|
|
|
/**
|
|
* Helper function to get the @-Mentions from the post content.
|
|
*
|
|
* @return array The list of @-Mentions.
|
|
*/
|
|
protected function get_mentions() {
|
|
return apply_filters( 'activitypub_extract_mentions', array(), $this->wp_object->post_content, $this->wp_object );
|
|
}
|
|
|
|
/**
|
|
* Returns the locale of the post.
|
|
*
|
|
* @return string The locale of the post.
|
|
*/
|
|
public function get_locale() {
|
|
$post_id = $this->wp_object->ID;
|
|
$lang = \strtolower( \strtok( \get_locale(), '_-' ) );
|
|
|
|
/**
|
|
* Filter the locale of the post.
|
|
*
|
|
* @param string $lang The locale of the post.
|
|
* @param int $post_id The post ID.
|
|
* @param WP_Post $post The post object.
|
|
*
|
|
* @return string The filtered locale of the post.
|
|
*/
|
|
return apply_filters( 'activitypub_post_locale', $lang, $post_id, $this->wp_object );
|
|
}
|
|
}
|