471 lines
12 KiB
PHP
471 lines
12 KiB
PHP
<?php
|
|
|
|
namespace Activitypub;
|
|
|
|
use Activitypub\Collection\Users;
|
|
use WP_Comment_Query;
|
|
|
|
use function Activitypub\is_user_disabled;
|
|
use function Activitypub\is_single_user;
|
|
|
|
/**
|
|
* ActivityPub Comment Class
|
|
*
|
|
* This class is a helper/utils class that provides a collection of static
|
|
* methods that are used to handle comments.
|
|
*/
|
|
class Comment {
|
|
/**
|
|
* Initialize the class, registering WordPress hooks
|
|
*/
|
|
public static function init() {
|
|
\add_filter( 'comment_reply_link', array( self::class, 'comment_reply_link' ), 10, 3 );
|
|
\add_filter( 'comment_class', array( self::class, 'comment_class' ), 10, 3 );
|
|
\add_filter( 'get_comment_link', array( self::class, 'remote_comment_link' ), 11, 3 );
|
|
\add_action( 'wp_enqueue_scripts', array( self::class, 'enqueue_scripts' ) );
|
|
}
|
|
|
|
/**
|
|
* Filter the comment reply link.
|
|
*
|
|
* We don't want to show the comment reply link for federated comments
|
|
* if the user is disabled for federation.
|
|
*
|
|
* @param string $link The HTML markup for the comment reply link.
|
|
* @param array $args An array of arguments overriding the defaults.
|
|
* @param WP_Comment $comment The object of the comment being replied.
|
|
*
|
|
* @return string The filtered HTML markup for the comment reply link.
|
|
*/
|
|
public static function comment_reply_link( $link, $args, $comment ) {
|
|
if ( self::are_comments_allowed( $comment ) ) {
|
|
$user_id = get_current_user_id();
|
|
if ( $user_id && self::was_received( $comment ) && \user_can( $user_id, 'activitypub' ) ) {
|
|
return self::create_fediverse_reply_link( $link, $args );
|
|
}
|
|
|
|
return $link;
|
|
}
|
|
|
|
$attrs = array(
|
|
'selectedComment' => self::generate_id( $comment ),
|
|
'commentId' => $comment->comment_ID,
|
|
);
|
|
|
|
$div = sprintf(
|
|
'<div class="activitypub-remote-reply" data-attrs="%s"></div>',
|
|
esc_attr( wp_json_encode( $attrs ) )
|
|
);
|
|
|
|
return apply_filters( 'activitypub_comment_reply_link', $div );
|
|
}
|
|
|
|
/**
|
|
* Create a link to reply to a federated comment.
|
|
* This function adds a title attribute to the reply link to inform the user
|
|
* that the comment was received from the fediverse and the reply will be sent
|
|
* to the original author.
|
|
*
|
|
* @param string $link The HTML markup for the comment reply link.
|
|
* @param array $args The args provided by the `comment_reply_link` filter.
|
|
*
|
|
* @return string The modified HTML markup for the comment reply link.
|
|
*/
|
|
private static function create_fediverse_reply_link( $link, $args ) {
|
|
$str_to_replace = sprintf( '>%s<', $args['reply_text'] );
|
|
$replace_with = sprintf(
|
|
' title="%s">%s<',
|
|
esc_attr__( 'This comment was received from the fediverse and your reply will be sent to the original author', 'activitypub' ),
|
|
esc_html__( 'Reply with federation', 'activitypub' )
|
|
);
|
|
return str_replace( $str_to_replace, $replace_with, $link );
|
|
}
|
|
|
|
/**
|
|
* Check if it is allowed to comment to a comment.
|
|
*
|
|
* Checks if the comment is local only or if the user can comment federated comments.
|
|
*
|
|
* @param mixed $comment Comment object or ID.
|
|
*
|
|
* @return boolean True if the user can comment, false otherwise.
|
|
*/
|
|
public static function are_comments_allowed( $comment ) {
|
|
$comment = \get_comment( $comment );
|
|
|
|
if ( ! self::was_received( $comment ) ) {
|
|
return true;
|
|
}
|
|
|
|
$current_user = get_current_user_id();
|
|
|
|
if ( ! $current_user ) {
|
|
return false;
|
|
}
|
|
|
|
if ( is_single_user() && \user_can( $current_user, 'publish_posts' ) ) {
|
|
// On a single user site, comments by users with the `publish_posts` capability will be federated as the blog user
|
|
$current_user = Users::BLOG_USER_ID;
|
|
}
|
|
|
|
$is_user_disabled = is_user_disabled( $current_user );
|
|
|
|
if ( $is_user_disabled ) {
|
|
return false;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
/**
|
|
* Check if a comment is federated.
|
|
*
|
|
* We consider a comment federated if comment was received via ActivityPub.
|
|
*
|
|
* Use this function to check if it is comment that was received via ActivityPub.
|
|
*
|
|
* @param mixed $comment Comment object or ID.
|
|
*
|
|
* @return boolean True if the comment is federated, false otherwise.
|
|
*/
|
|
public static function was_received( $comment ) {
|
|
$comment = \get_comment( $comment );
|
|
|
|
if ( ! $comment ) {
|
|
return false;
|
|
}
|
|
|
|
$protocol = \get_comment_meta( $comment->comment_ID, 'protocol', true );
|
|
|
|
if ( 'activitypub' === $protocol ) {
|
|
return true;
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
/**
|
|
* Check if a comment was federated.
|
|
*
|
|
* This function checks if a comment was federated via ActivityPub.
|
|
*
|
|
* @param mixed $comment Comment object or ID.
|
|
*
|
|
* @return boolean True if the comment was federated, false otherwise.
|
|
*/
|
|
public static function was_sent( $comment ) {
|
|
$comment = \get_comment( $comment );
|
|
|
|
if ( ! $comment ) {
|
|
return false;
|
|
}
|
|
|
|
$status = \get_comment_meta( $comment->comment_ID, 'activitypub_status', true );
|
|
|
|
if ( $status ) {
|
|
return true;
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
/**
|
|
* Check if a comment is local only.
|
|
*
|
|
* This function checks if a comment is local only and was not sent or received via ActivityPub.
|
|
*
|
|
* @param mixed $comment Comment object or ID.
|
|
*
|
|
* @return boolean True if the comment is local only, false otherwise.
|
|
*/
|
|
public static function is_local( $comment ) {
|
|
if ( self::was_sent( $comment ) || self::was_received( $comment ) ) {
|
|
return false;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
/**
|
|
* Check if a comment should be federated.
|
|
*
|
|
* We consider a comment should be federated if it is authored by a user that is
|
|
* not disabled for federation and if it is a reply directly to the post or to a
|
|
* federated comment.
|
|
*
|
|
* Use this function to check if a comment should be federated.
|
|
*
|
|
* @param mixed $comment Comment object or ID.
|
|
*
|
|
* @return boolean True if the comment should be federated, false otherwise.
|
|
*/
|
|
public static function should_be_federated( $comment ) {
|
|
// we should not federate federated comments
|
|
if ( self::was_received( $comment ) ) {
|
|
return false;
|
|
}
|
|
|
|
$comment = \get_comment( $comment );
|
|
$user_id = $comment->user_id;
|
|
|
|
// comments without user can't be federated
|
|
if ( ! $user_id ) {
|
|
return false;
|
|
}
|
|
|
|
if ( is_single_user() && \user_can( $user_id, 'publish_posts' ) ) {
|
|
// On a single user site, comments by users with the `publish_posts` capability will be federated as the blog user
|
|
$user_id = Users::BLOG_USER_ID;
|
|
}
|
|
|
|
$is_user_disabled = is_user_disabled( $user_id );
|
|
|
|
// user is disabled for federation
|
|
if ( $is_user_disabled ) {
|
|
return false;
|
|
}
|
|
|
|
// it is a comment to the post and can be federated
|
|
if ( empty( $comment->comment_parent ) ) {
|
|
return true;
|
|
}
|
|
|
|
// check if parent comment is federated
|
|
$parent_comment = \get_comment( $comment->comment_parent );
|
|
|
|
return ! self::is_local( $parent_comment );
|
|
}
|
|
|
|
/**
|
|
* Examine a comment ID and look up an existing comment it represents.
|
|
*
|
|
* @param string $id ActivityPub object ID (usually a URL) to check.
|
|
*
|
|
* @return int|boolean Comment ID, or false on failure.
|
|
*/
|
|
public static function object_id_to_comment( $id ) {
|
|
$comment_query = new WP_Comment_Query(
|
|
array(
|
|
'meta_key' => 'source_id', // phpcs:ignore WordPress.DB.SlowDBQuery.slow_db_query_meta_key
|
|
'meta_value' => $id, // phpcs:ignore WordPress.DB.SlowDBQuery.slow_db_query_meta_value
|
|
)
|
|
);
|
|
|
|
if ( ! $comment_query->comments ) {
|
|
return false;
|
|
}
|
|
|
|
if ( count( $comment_query->comments ) > 1 ) {
|
|
return false;
|
|
}
|
|
|
|
return $comment_query->comments[0];
|
|
}
|
|
|
|
/**
|
|
* Verify if URL is a local comment, or if it is a previously received
|
|
* remote comment (For threading comments locally)
|
|
*
|
|
* @param string $url The URL to check.
|
|
*
|
|
* @return int comment_ID or null if not found
|
|
*/
|
|
public static function url_to_commentid( $url ) {
|
|
if ( ! $url || ! filter_var( $url, \FILTER_VALIDATE_URL ) ) {
|
|
return null;
|
|
}
|
|
|
|
// check for local comment
|
|
if ( \wp_parse_url( \site_url(), \PHP_URL_HOST ) === \wp_parse_url( $url, \PHP_URL_HOST ) ) {
|
|
$query = \wp_parse_url( $url, \PHP_URL_QUERY );
|
|
|
|
if ( $query ) {
|
|
parse_str( $query, $params );
|
|
|
|
if ( ! empty( $params['c'] ) ) {
|
|
$comment = \get_comment( $params['c'] );
|
|
|
|
if ( $comment ) {
|
|
return $comment->comment_ID;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
$args = array(
|
|
// phpcs:ignore WordPress.DB.SlowDBQuery.slow_db_query_meta_query
|
|
'meta_query' => array(
|
|
'relation' => 'OR',
|
|
array(
|
|
'key' => 'source_url',
|
|
'value' => $url,
|
|
),
|
|
array(
|
|
'key' => 'source_id',
|
|
'value' => $url,
|
|
),
|
|
),
|
|
);
|
|
|
|
$query = new WP_Comment_Query();
|
|
$comments = $query->query( $args );
|
|
|
|
if ( $comments && is_array( $comments ) ) {
|
|
return $comments[0]->comment_ID;
|
|
}
|
|
|
|
return null;
|
|
}
|
|
|
|
/**
|
|
* Filters the CSS classes to add an ActivityPub class.
|
|
*
|
|
* @param string[] $classes An array of comment classes.
|
|
* @param string[] $css_class An array of additional classes added to the list.
|
|
* @param string $comment_id The comment ID as a numeric string.
|
|
*
|
|
* @return string[] An array of classes.
|
|
*/
|
|
public static function comment_class( $classes, $css_class, $comment_id ) {
|
|
// check if ActivityPub comment
|
|
if ( 'activitypub' === get_comment_meta( $comment_id, 'protocol', true ) ) {
|
|
$classes[] = 'activitypub-comment';
|
|
}
|
|
|
|
return $classes;
|
|
}
|
|
|
|
/**
|
|
* Link remote comments to source url.
|
|
*
|
|
* @param string $comment_link
|
|
* @param object|WP_Comment $comment
|
|
*
|
|
* @return string $url
|
|
*/
|
|
public static function remote_comment_link( $comment_link, $comment ) {
|
|
if ( ! $comment || is_admin() ) {
|
|
return $comment_link;
|
|
}
|
|
|
|
$comment_meta = \get_comment_meta( $comment->comment_ID );
|
|
|
|
if ( ! empty( $comment_meta['source_url'][0] ) ) {
|
|
return $comment_meta['source_url'][0];
|
|
} elseif ( ! empty( $comment_meta['source_id'][0] ) ) {
|
|
return $comment_meta['source_id'][0];
|
|
}
|
|
|
|
return $comment_link;
|
|
}
|
|
|
|
|
|
/**
|
|
* Generates an ActivityPub URI for a comment
|
|
*
|
|
* @param WP_Comment|int $comment A comment object or comment ID
|
|
*
|
|
* @return string ActivityPub URI for comment
|
|
*/
|
|
public static function generate_id( $comment ) {
|
|
$comment = \get_comment( $comment );
|
|
$comment_meta = \get_comment_meta( $comment->comment_ID );
|
|
|
|
// show external comment ID if it exists
|
|
if ( ! empty( $comment_meta['source_id'][0] ) ) {
|
|
return $comment_meta['source_id'][0];
|
|
} elseif ( ! empty( $comment_meta['source_url'][0] ) ) {
|
|
return $comment_meta['source_url'][0];
|
|
}
|
|
|
|
// generate URI based on comment ID
|
|
return \add_query_arg(
|
|
array(
|
|
'c' => $comment->comment_ID,
|
|
),
|
|
\trailingslashit( site_url() )
|
|
);
|
|
}
|
|
|
|
/**
|
|
* Check if a post has remote comments
|
|
*
|
|
* @param int $post_id The post ID.
|
|
*
|
|
* @return bool True if the post has remote comments, false otherwise.
|
|
*/
|
|
private static function post_has_remote_comments( $post_id ) {
|
|
$comments = \get_comments(
|
|
array(
|
|
'post_id' => $post_id,
|
|
'meta_query' => array(
|
|
'relation' => 'AND',
|
|
array(
|
|
'key' => 'protocol',
|
|
'value' => 'activitypub',
|
|
'compare' => '=',
|
|
),
|
|
array(
|
|
'key' => 'source_id',
|
|
'compare' => 'EXISTS',
|
|
),
|
|
),
|
|
)
|
|
);
|
|
|
|
return ! empty( $comments );
|
|
}
|
|
|
|
/**
|
|
* Enqueue scripts for remote comments
|
|
*/
|
|
public static function enqueue_scripts() {
|
|
if ( ! \is_singular() || \is_user_logged_in() ) {
|
|
// only on single pages, only for logged out users
|
|
return;
|
|
}
|
|
|
|
if ( ! \post_type_supports( \get_post_type(), 'activitypub' ) ) {
|
|
// post type does not support ActivityPub
|
|
return;
|
|
}
|
|
|
|
if ( ! \comments_open() || ! \get_comments_number() ) {
|
|
// no comments, no need to load the script
|
|
return;
|
|
}
|
|
|
|
if ( ! self::post_has_remote_comments( \get_the_ID() ) ) {
|
|
// no remote comments, no need to load the script
|
|
return;
|
|
}
|
|
|
|
$handle = 'activitypub-remote-reply';
|
|
$data = array(
|
|
'namespace' => ACTIVITYPUB_REST_NAMESPACE,
|
|
);
|
|
$js = sprintf( 'var _activityPubOptions = %s;', wp_json_encode( $data ) );
|
|
$asset_file = ACTIVITYPUB_PLUGIN_DIR . 'build/remote-reply/index.asset.php';
|
|
|
|
if ( \file_exists( $asset_file ) ) {
|
|
$assets = require_once $asset_file;
|
|
|
|
\wp_enqueue_script(
|
|
$handle,
|
|
\plugins_url( 'build/remote-reply/index.js', __DIR__ ),
|
|
$assets['dependencies'],
|
|
$assets['version'],
|
|
true
|
|
);
|
|
\wp_add_inline_script( $handle, $js, 'before' );
|
|
|
|
\wp_enqueue_style(
|
|
$handle,
|
|
\plugins_url( 'build/remote-reply/style-index.css', __DIR__ ),
|
|
[ 'wp-components' ],
|
|
$assets['version']
|
|
);
|
|
}
|
|
}
|
|
}
|