wordpress-activitypub/includes/transformer/class-comment.php

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<?php
namespace Activitypub\Transformer;
use WP_Comment;
use Activitypub\Collection\Users;
use Activitypub\Model\Blog_User;
use Activitypub\Activity\Base_Object;
use Activitypub\Hashtag;
use function Activitypub\esc_hashtag;
use function Activitypub\is_single_user;
use function Activitypub\get_rest_url_by_path;
/**
* WordPress Comment Transformer
*
* The Comment Transformer is responsible for transforming a WP_Comment object into different
* Object-Types.
*
* Currently supported are:
*
* - Activitypub\Activity\Base_Object
*/
class Comment {
/**
* The WP_Comment object.
*
* @var WP_Comment
*/
protected $wp_comment;
/**
* Static function to Transform a WP_Comment Object.
*
* This helps to chain the output of the Transformer.
*
* @param WP_Comment $wp_comment The WP_Comment object
*
* @return void
*/
public static function transform( WP_Comment $wp_comment ) {
return new static( $wp_comment );
}
/**
*
*
* @param WP_Comment $wp_comment
*/
public function __construct( WP_Comment $wp_comment ) {
$this->wp_comment = $wp_comment;
}
/**
* Transforms the WP_Comment object to an ActivityPub Object
*
* @see \Activitypub\Activity\Base_Object
*
* @return \Activitypub\Activity\Base_Object The ActivityPub Object
*/
public function to_object() {
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$comment = $this->wp_comment;
$object = new Base_Object();
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$object->set_id( $this->get_id() );
$object->set_url( \get_comment_link( $comment->ID ) );
$object->set_context( \get_permalink( $comment->comment_post_ID ) );
$object->set_type( 'Note' );
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$published = \strtotime( $comment->comment_date_gmt );
$object->set_published( \gmdate( 'Y-m-d\TH:i:s\Z', $published ) );
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$updated = \get_comment_meta( $comment->comment_ID, 'ap_last_modified', true );
if ( $updated > $published ) {
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$object->set_updated( \gmdate( 'Y-m-d\TH:i:s\Z', \strtotime( $updated ) ) );
}
$object->set_attributed_to( $this->get_attributed_to() );
$object->set_in_reply_to( $this->get_in_reply_to() );
$object->set_content( $this->get_content() );
$object->set_content_map(
array(
\strstr( \get_locale(), '_', true ) => $this->get_content(),
)
);
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$path = sprintf( 'users/%d/followers', intval( $comment->comment_author ) );
$object->set_to(
array(
'https://www.w3.org/ns/activitystreams#Public',
get_rest_url_by_path( $path ),
)
);
$object->set_cc( $this->get_cc() );
$object->set_tag( $this->get_tags() );
return $object;
}
/**
* Returns the User-URL of the Author of the Post.
*
* If `single_user` mode is enabled, the URL of the Blog-User is returned.
*
* @return string The User-URL.
*/
protected function get_attributed_to() {
if ( is_single_user() ) {
$user = new Blog_User();
return $user->get_url();
}
return Users::get_by_id( $this->wp_comment->user_id )->get_url();
}
/**
* Returns a list of Mentions, used in the Comment.
*
* @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 $mention => $url ) {
$cc[] = $url;
}
}
return $cc;
}
/**
* Returns a list of Tags, used in the Comment.
*
* This includes Hash-Tags and Mentions.
*
* @return array The list of Tags.
*/
protected function get_tags() {
// TODO Delete Or Modify
$tags = array();
$comment_tags = self::get_hashtags();
if ( $comment_tags ) {
foreach ( $comment_tags as $comment_tag ) {
$tag_link = \get_tag_link( $comment_tag );
if ( ! $tag_link ) {
continue;
}
$tag = array(
'type' => 'Hashtag',
'href' => \esc_url( $tag_link ),
'name' => esc_hashtag( $comment_tag ),
);
$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 $tags;
}
/**
* Returns the content for the ActivityPub Item.
*
* The content will be generated based on the user settings.
*
* @return string The content.
*/
protected function get_content() {
// phpcs:ignore WordPress.WP.GlobalVariablesOverride.Prohibited
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$comment = $this->wp_comment;
$content = $comment->comment_content;
$content = \wpautop( $content );
$content = \preg_replace( '/[\n\r\t]/', '', $content );
$content = \trim( $content );
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$content = \apply_filters( 'the_content', $content, $comment );
$content = \html_entity_decode( $content, \ENT_QUOTES, 'UTF-8' );
return $content;
}
/**
* Helper function to get the @-Mentions from the comment content.
*
* @return array The list of @-Mentions.
*/
protected function get_mentions() {
return apply_filters( 'activitypub_extract_mentions', array(), $this->wp_comment->comment_content, $this->wp_comment );
}
/**
* Helper function to get the #HashTags from the comment content.
*
* @return array The list of @-Mentions.
*/
protected function get_hashtags() {
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$content = $this->get_content();
$tags = [];
//TODO fix hashtag
if ( \preg_match_all( '/' . ACTIVITYPUB_HASHTAGS_REGEXP . '/i', $content, $match ) ) {
$tags = \implode( ', ', $match[1] );
}
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$hashtags = [];
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preg_match_all( "/(#\w+)/u", $content, $matches );
if ( $matches ) {
$hashtags = array_count_values( $matches[0] );
$hashtags = array_keys( $hashtags );
}
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return $hashtags;
}
/**
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* get_parent_uri (in reply to)
* takes a comment and returns
* @param WP_Comment activitypub object id URI
* @return int comment_id
*/
protected function get_in_reply_to() {
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$comment = $this->wp_comment;
$parent_comment = \get_comment( $comment->comment_parent );
if ( $parent_comment ) {
//is parent remote?
$in_reply_to = $this->get_source_id( $parent_comment );
if ( ! $in_reply_to ) {
//local
$in_reply_to = $this->get_id( $comment );
}
} else {
$pretty_permalink = \get_post_meta( $comment->comment_post_ID, 'activitypub_canonical_url', true );
if ( $pretty_permalink ) {
$in_reply_to = $pretty_permalink;
} else {
$in_reply_to = \get_permalink( $comment->comment_post_ID );
}
}
return $in_reply_to;
}
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/**
* @param $comment or $comment_id
* @return ActivityPub URI of comment
*
* AP Object ID must be unique
*
* https://www.w3.org/TR/activitypub/#obj-id
* https://github.com/tootsuite/mastodon/issues/13879
*/
protected function get_id() {
$comment = $this->wp_comment;
$comment = \get_comment( $comment );
$ap_comment_id = \add_query_arg(
array(
'p' => $comment->comment_post_ID,
'replytocom' => $comment->comment_ID,
),
\trailingslashit( site_url() )
);
return $ap_comment_id;
}
/**
* Checks a comment ID for a source_id, or source_url
*/
protected function get_source_id( $comment ) {
if ( $comment->user_id !== 0 ) {
$source_id = \get_comment_meta( $comment->ID, 'source_id', true );
if ( ! $source_id ) {
$source_url = \get_comment_meta( $comment->ID, 'source_url', true );
if ( ! $source_url ) {
return null;
}
$response = safe_remote_get( $source_url );
$body = \wp_remote_retrieve_body( $response );
$remote_status = \json_decode( $body, true );
if ( is_wp_error( $remote_status )
|| ! isset( $remote_status['@context'] )
|| ! isset( $remote_status['object']['id'] ) ) {
// the original post may have been deleted, before we started processing deletes.
return null;
}
$source_id = $remote_status['object']['id'];
}
return $source_id;
}
return null;
}
}