| 1 |
<?php |
| 2 |
|
| 3 |
namespace Activitypub; |
| 4 |
|
| 5 |
use Activitypub\Collection\Users; |
| 6 |
use WP_Comment_Query; |
| 7 |
|
| 8 |
use function Activitypub\is_user_disabled; |
| 9 |
use function Activitypub\is_single_user; |
| 10 |
|
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/** |
| 12 |
* ActivityPub Comment Class |
| 13 |
* |
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* This class is a helper/utils class that provides a collection of static |
| 15 |
* methods that are used to handle comments. |
| 16 |
*/ |
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class Comment { |
| 18 |
/** |
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* Initialize the class, registering WordPress hooks |
| 20 |
*/ |
| 21 |
public static function init() { |
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self::register_comment_types(); |
| 23 |
|
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\add_filter( 'comment_reply_link', array( self::class, 'comment_reply_link' ), 10, 3 ); |
| 25 |
\add_filter( 'comment_class', array( self::class, 'comment_class' ), 10, 3 ); |
| 26 |
\add_filter( 'get_comment_link', array( self::class, 'remote_comment_link' ), 11, 3 ); |
| 27 |
\add_action( 'wp_enqueue_scripts', array( self::class, 'enqueue_scripts' ) ); |
| 28 |
\add_action( 'pre_get_comments', array( static::class, 'comment_query' ) ); |
| 29 |
|
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\add_filter( 'get_avatar_comment_types', array( static::class, 'get_avatar_comment_types' ), 99 ); |
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} |
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|
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/** |
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* Filter the comment reply link. |
| 35 |
* |
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* We don't want to show the comment reply link for federated comments |
| 37 |
* if the user is disabled for federation. |
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* |
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* @param string $link The HTML markup for the comment reply link. |
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* @param array $args An array of arguments overriding the defaults. |
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* @param WP_Comment $comment The object of the comment being replied. |
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* |
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* @return string The filtered HTML markup for the comment reply link. |
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*/ |
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public static function comment_reply_link( $link, $args, $comment ) { |
| 46 |
if ( self::are_comments_allowed( $comment ) ) { |
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$user_id = get_current_user_id(); |
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if ( $user_id && self::was_received( $comment ) && \user_can( $user_id, 'activitypub' ) ) { |
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return self::create_fediverse_reply_link( $link, $args ); |
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} |
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|
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return $link; |
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} |
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|
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$attrs = array( |
| 56 |
'selectedComment' => self::generate_id( $comment ), |
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'commentId' => $comment->comment_ID, |
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); |
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|
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$div = sprintf( |
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'<div class="activitypub-remote-reply" data-attrs="%s"></div>', |
| 62 |
esc_attr( wp_json_encode( $attrs ) ) |
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); |
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|
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return apply_filters( 'activitypub_comment_reply_link', $div ); |
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} |
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|
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/** |
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* Create a link to reply to a federated comment. |
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* This function adds a title attribute to the reply link to inform the user |
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* that the comment was received from the fediverse and the reply will be sent |
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* to the original author. |
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* |
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* @param string $link The HTML markup for the comment reply link. |
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* @param array $args The args provided by the `comment_reply_link` filter. |
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* |
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* @return string The modified HTML markup for the comment reply link. |
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*/ |
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private static function create_fediverse_reply_link( $link, $args ) { |
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$str_to_replace = sprintf( '>%s<', $args['reply_text'] ); |
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$replace_with = sprintf( |
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' title="%s">%s<', |
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esc_attr__( 'This comment was received from the fediverse and your reply will be sent to the original author', 'activitypub' ), |
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esc_html__( 'Reply with federation', 'activitypub' ) |
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); |
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return str_replace( $str_to_replace, $replace_with, $link ); |
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} |
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|
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/** |
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* Check if it is allowed to comment to a comment. |
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* |
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* Checks if the comment is local only or if the user can comment federated comments. |
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* |
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* @param mixed $comment Comment object or ID. |
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* |
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* @return boolean True if the user can comment, false otherwise. |
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*/ |
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public static function are_comments_allowed( $comment ) { |
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$comment = \get_comment( $comment ); |
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|
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if ( ! self::was_received( $comment ) ) { |
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return true; |
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} |
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|
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$current_user = get_current_user_id(); |
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|
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if ( ! $current_user ) { |
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return false; |
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} |
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|
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if ( is_single_user() && \user_can( $current_user, 'publish_posts' ) ) { |
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// On a single user site, comments by users with the `publish_posts` capability will be federated as the blog user |
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$current_user = Users::BLOG_USER_ID; |
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} |
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|
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$is_user_disabled = is_user_disabled( $current_user ); |
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|
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if ( $is_user_disabled ) { |
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return false; |
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} |
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|
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return true; |
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} |
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|
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/** |
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* Check if a comment is federated. |
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* |
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* We consider a comment federated if comment was received via ActivityPub. |
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* |
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* Use this function to check if it is comment that was received via ActivityPub. |
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* |
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* @param mixed $comment Comment object or ID. |
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* |
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* @return boolean True if the comment is federated, false otherwise. |
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*/ |
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public static function was_received( $comment ) { |
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$comment = \get_comment( $comment ); |
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|
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if ( ! $comment ) { |
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return false; |
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} |
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|
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$protocol = \get_comment_meta( $comment->comment_ID, 'protocol', true ); |
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|
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if ( 'activitypub' === $protocol ) { |
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return true; |
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} |
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|
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return false; |
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} |
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|
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/** |
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* Check if a comment was federated. |
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* |
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* This function checks if a comment was federated via ActivityPub. |
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* |
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* @param mixed $comment Comment object or ID. |
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* |
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* @return boolean True if the comment was federated, false otherwise. |
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*/ |
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public static function was_sent( $comment ) { |
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$comment = \get_comment( $comment ); |
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|
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if ( ! $comment ) { |
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return false; |
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} |
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|
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$status = \get_comment_meta( $comment->comment_ID, 'activitypub_status', true ); |
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|
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if ( $status ) { |
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return true; |
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} |
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|
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return false; |
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} |
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|
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/** |
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* Check if a comment is local only. |
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* |
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* This function checks if a comment is local only and was not sent or received via ActivityPub. |
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* |
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* @param mixed $comment Comment object or ID. |
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* |
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* @return boolean True if the comment is local only, false otherwise. |
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*/ |
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public static function is_local( $comment ) { |
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if ( self::was_sent( $comment ) || self::was_received( $comment ) ) { |
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return false; |
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} |
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|
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return true; |
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} |
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|
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/** |
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* Check if a comment should be federated. |
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* |
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* We consider a comment should be federated if it is authored by a user that is |
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* not disabled for federation and if it is a reply directly to the post or to a |
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* federated comment. |
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* |
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* Use this function to check if a comment should be federated. |
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* |
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* @param mixed $comment Comment object or ID. |
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* |
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* @return boolean True if the comment should be federated, false otherwise. |
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*/ |
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public static function should_be_federated( $comment ) { |
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// we should not federate federated comments |
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if ( self::was_received( $comment ) ) { |
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return false; |
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} |
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|
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$comment = \get_comment( $comment ); |
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$user_id = $comment->user_id; |
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|
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// comments without user can't be federated |
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if ( ! $user_id ) { |
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return false; |
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} |
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|
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if ( is_single_user() && \user_can( $user_id, 'publish_posts' ) ) { |
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// On a single user site, comments by users with the `publish_posts` capability will be federated as the blog user |
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$user_id = Users::BLOG_USER_ID; |
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} |
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|
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$is_user_disabled = is_user_disabled( $user_id ); |
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|
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// user is disabled for federation |
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if ( $is_user_disabled ) { |
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return false; |
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} |
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|
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// it is a comment to the post and can be federated |
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if ( empty( $comment->comment_parent ) ) { |
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return true; |
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} |
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|
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// check if parent comment is federated |
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$parent_comment = \get_comment( $comment->comment_parent ); |
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|
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return ! self::is_local( $parent_comment ); |
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} |
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|
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/** |
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* Examine a comment ID and look up an existing comment it represents. |
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* |
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* @param string $id ActivityPub object ID (usually a URL) to check. |
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* |
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* @return \WP_Comment|false Comment object, or false on failure. |
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*/ |
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public static function object_id_to_comment( $id ) { |
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$comment_query = new WP_Comment_Query( |
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array( |
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'meta_key' => 'source_id', // phpcs:ignore WordPress.DB.SlowDBQuery.slow_db_query_meta_key |
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'meta_value' => $id, // phpcs:ignore WordPress.DB.SlowDBQuery.slow_db_query_meta_value |
| 256 |
) |
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); |
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|
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if ( ! $comment_query->comments ) { |
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return false; |
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} |
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|
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if ( count( $comment_query->comments ) > 1 ) { |
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return false; |
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} |
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|
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return $comment_query->comments[0]; |
| 268 |
} |
| 269 |
|
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/** |
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* Verify if URL is a local comment, or if it is a previously received |
| 272 |
* remote comment (For threading comments locally) |
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* |
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* @param string $url The URL to check. |
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* |
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* @return int comment_ID or null if not found |
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*/ |
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public static function url_to_commentid( $url ) { |
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if ( ! $url || ! filter_var( $url, \FILTER_VALIDATE_URL ) ) { |
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return null; |
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} |
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|
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// check for local comment |
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if ( \wp_parse_url( \home_url(), \PHP_URL_HOST ) === \wp_parse_url( $url, \PHP_URL_HOST ) ) { |
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$query = \wp_parse_url( $url, \PHP_URL_QUERY ); |
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|
| 287 |
if ( $query ) { |
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parse_str( $query, $params ); |
| 289 |
|
| 290 |
if ( ! empty( $params['c'] ) ) { |
| 291 |
$comment = \get_comment( $params['c'] ); |
| 292 |
|
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if ( $comment ) { |
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return $comment->comment_ID; |
| 295 |
} |
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} |
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} |
| 298 |
} |
| 299 |
|
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$args = array( |
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// phpcs:ignore WordPress.DB.SlowDBQuery.slow_db_query_meta_query |
| 302 |
'meta_query' => array( |
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'relation' => 'OR', |
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array( |
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'key' => 'source_url', |
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'value' => $url, |
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), |
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array( |
| 309 |
'key' => 'source_id', |
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'value' => $url, |
| 311 |
), |
| 312 |
), |
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); |
| 314 |
|
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$query = new WP_Comment_Query(); |
| 316 |
$comments = $query->query( $args ); |
| 317 |
|
| 318 |
if ( $comments && is_array( $comments ) ) { |
| 319 |
return $comments[0]->comment_ID; |
| 320 |
} |
| 321 |
|
| 322 |
return null; |
| 323 |
} |
| 324 |
|
| 325 |
/** |
| 326 |
* Filters the CSS classes to add an ActivityPub class. |
| 327 |
* |
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* @param string[] $classes An array of comment classes. |
| 329 |
* @param string[] $css_class An array of additional classes added to the list. |
| 330 |
* @param string $comment_id The comment ID as a numeric string. |
| 331 |
* |
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* @return string[] An array of classes. |
| 333 |
*/ |
| 334 |
public static function comment_class( $classes, $css_class, $comment_id ) { |
| 335 |
// check if ActivityPub comment |
| 336 |
if ( 'activitypub' === get_comment_meta( $comment_id, 'protocol', true ) ) { |
| 337 |
$classes[] = 'activitypub-comment'; |
| 338 |
} |
| 339 |
|
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return $classes; |
| 341 |
} |
| 342 |
|
| 343 |
/** |
| 344 |
* Link remote comments to source url. |
| 345 |
* |
| 346 |
* @param string $comment_link |
| 347 |
* @param object|WP_Comment $comment |
| 348 |
* |
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* @return string $url |
| 350 |
*/ |
| 351 |
public static function remote_comment_link( $comment_link, $comment ) { |
| 352 |
if ( ! $comment || is_admin() ) { |
| 353 |
return $comment_link; |
| 354 |
} |
| 355 |
|
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$comment_meta = \get_comment_meta( $comment->comment_ID ); |
| 357 |
|
| 358 |
if ( ! empty( $comment_meta['source_url'][0] ) ) { |
| 359 |
return $comment_meta['source_url'][0]; |
| 360 |
} elseif ( ! empty( $comment_meta['source_id'][0] ) ) { |
| 361 |
return $comment_meta['source_id'][0]; |
| 362 |
} |
| 363 |
|
| 364 |
return $comment_link; |
| 365 |
} |
| 366 |
|
| 367 |
|
| 368 |
/** |
| 369 |
* Generates an ActivityPub URI for a comment |
| 370 |
* |
| 371 |
* @param WP_Comment|int $comment A comment object or comment ID |
| 372 |
* |
| 373 |
* @return string ActivityPub URI for comment |
| 374 |
*/ |
| 375 |
public static function generate_id( $comment ) { |
| 376 |
$comment = \get_comment( $comment ); |
| 377 |
$comment_meta = \get_comment_meta( $comment->comment_ID ); |
| 378 |
|
| 379 |
// show external comment ID if it exists |
| 380 |
if ( ! empty( $comment_meta['source_id'][0] ) ) { |
| 381 |
return $comment_meta['source_id'][0]; |
| 382 |
} elseif ( ! empty( $comment_meta['source_url'][0] ) ) { |
| 383 |
return $comment_meta['source_url'][0]; |
| 384 |
} |
| 385 |
|
| 386 |
// generate URI based on comment ID |
| 387 |
return \add_query_arg( 'c', $comment->comment_ID, \trailingslashit( \home_url() ) ); |
| 388 |
} |
| 389 |
|
| 390 |
/** |
| 391 |
* Check if a post has remote comments |
| 392 |
* |
| 393 |
* @param int $post_id The post ID. |
| 394 |
* |
| 395 |
* @return bool True if the post has remote comments, false otherwise. |
| 396 |
*/ |
| 397 |
private static function post_has_remote_comments( $post_id ) { |
| 398 |
$comments = \get_comments( |
| 399 |
array( |
| 400 |
'post_id' => $post_id, |
| 401 |
// phpcs:ignore WordPress.DB.SlowDBQuery.slow_db_query_meta_query |
| 402 |
'meta_query' => array( |
| 403 |
'relation' => 'AND', |
| 404 |
array( |
| 405 |
'key' => 'protocol', |
| 406 |
'value' => 'activitypub', |
| 407 |
'compare' => '=', |
| 408 |
), |
| 409 |
array( |
| 410 |
'key' => 'source_id', |
| 411 |
'compare' => 'EXISTS', |
| 412 |
), |
| 413 |
), |
| 414 |
) |
| 415 |
); |
| 416 |
|
| 417 |
return ! empty( $comments ); |
| 418 |
} |
| 419 |
|
| 420 |
/** |
| 421 |
* Enqueue scripts for remote comments |
| 422 |
*/ |
| 423 |
public static function enqueue_scripts() { |
| 424 |
if ( ! \is_singular() || \is_user_logged_in() ) { |
| 425 |
// only on single pages, only for logged out users |
| 426 |
return; |
| 427 |
} |
| 428 |
|
| 429 |
if ( ! \post_type_supports( \get_post_type(), 'activitypub' ) ) { |
| 430 |
// post type does not support ActivityPub |
| 431 |
return; |
| 432 |
} |
| 433 |
|
| 434 |
if ( ! \comments_open() || ! \get_comments_number() ) { |
| 435 |
// no comments, no need to load the script |
| 436 |
return; |
| 437 |
} |
| 438 |
|
| 439 |
if ( ! self::post_has_remote_comments( \get_the_ID() ) ) { |
| 440 |
// no remote comments, no need to load the script |
| 441 |
return; |
| 442 |
} |
| 443 |
|
| 444 |
$handle = 'activitypub-remote-reply'; |
| 445 |
$data = array( |
| 446 |
'namespace' => ACTIVITYPUB_REST_NAMESPACE, |
| 447 |
); |
| 448 |
$js = sprintf( 'var _activityPubOptions = %s;', wp_json_encode( $data ) ); |
| 449 |
$asset_file = ACTIVITYPUB_PLUGIN_DIR . 'build/remote-reply/index.asset.php'; |
| 450 |
|
| 451 |
if ( \file_exists( $asset_file ) ) { |
| 452 |
$assets = require_once $asset_file; |
| 453 |
|
| 454 |
\wp_enqueue_script( |
| 455 |
$handle, |
| 456 |
\plugins_url( 'build/remote-reply/index.js', __DIR__ ), |
| 457 |
$assets['dependencies'], |
| 458 |
$assets['version'], |
| 459 |
true |
| 460 |
); |
| 461 |
\wp_add_inline_script( $handle, $js, 'before' ); |
| 462 |
|
| 463 |
\wp_enqueue_style( |
| 464 |
$handle, |
| 465 |
\plugins_url( 'build/remote-reply/style-index.css', __DIR__ ), |
| 466 |
[ 'wp-components' ], |
| 467 |
$assets['version'] |
| 468 |
); |
| 469 |
} |
| 470 |
} |
| 471 |
|
| 472 |
/** |
| 473 |
* Return the registered custom comment types. |
| 474 |
* |
| 475 |
* @return array The registered custom comment types |
| 476 |
*/ |
| 477 |
public static function get_comment_types() { |
| 478 |
global $activitypub_comment_types; |
| 479 |
|
| 480 |
return $activitypub_comment_types; |
| 481 |
} |
| 482 |
|
| 483 |
/** |
| 484 |
* Is this a registered comment type |
| 485 |
* |
| 486 |
* @param string $slug The name of the type |
| 487 |
* @return boolean True if registered. |
| 488 |
*/ |
| 489 |
public static function is_registered_comment_type( $slug ) { |
| 490 |
$slug = strtolower( $slug ); |
| 491 |
$slug = sanitize_key( $slug ); |
| 492 |
|
| 493 |
return in_array( $slug, array_keys( self::get_comment_types() ), true ); |
| 494 |
} |
| 495 |
|
| 496 |
/** |
| 497 |
* Return the registered custom comment types names. |
| 498 |
* |
| 499 |
* @return array The registered custom comment type names |
| 500 |
*/ |
| 501 |
public static function get_comment_type_names() { |
| 502 |
return array_values( wp_list_pluck( self::get_comment_types(), 'type' ) ); |
| 503 |
} |
| 504 |
|
| 505 |
/** |
| 506 |
* Get a comment type |
| 507 |
* |
| 508 |
* @param string $type The comment type |
| 509 |
* |
| 510 |
* @return array The comment type |
| 511 |
*/ |
| 512 |
public static function get_comment_type( $type ) { |
| 513 |
$type = strtolower( $type ); |
| 514 |
$type = sanitize_key( $type ); |
| 515 |
$types = self::get_comment_types(); |
| 516 |
|
| 517 |
if ( in_array( $type, array_keys( $types ), true ) ) { |
| 518 |
$type_array = $types[ $type ]; |
| 519 |
} else { |
| 520 |
$type_array = array(); |
| 521 |
} |
| 522 |
|
| 523 |
return apply_filters( "activitypub_comment_type_{$type}", $type_array ); |
| 524 |
} |
| 525 |
|
| 526 |
/** |
| 527 |
* Get a comment type attribute |
| 528 |
* |
| 529 |
* @param string $type The comment type |
| 530 |
* @param string $attr The attribute to get |
| 531 |
* |
| 532 |
* @return mixed The value of the attribute |
| 533 |
*/ |
| 534 |
public static function get_comment_type_attr( $type, $attr ) { |
| 535 |
$type_array = self::get_comment_type( $type ); |
| 536 |
|
| 537 |
if ( $type_array && isset( $type_array[ $attr ] ) ) { |
| 538 |
$value = $type_array[ $attr ]; |
| 539 |
} else { |
| 540 |
$value = ''; |
| 541 |
} |
| 542 |
|
| 543 |
return apply_filters( "activitypub_comment_type_{$attr}", $value, $type ); |
| 544 |
} |
| 545 |
|
| 546 |
|
| 547 |
|
| 548 |
/** |
| 549 |
* Register the comment types used by the ActivityPub plugin |
| 550 |
* |
| 551 |
* @return void |
| 552 |
*/ |
| 553 |
public static function register_comment_types() { |
| 554 |
register_comment_type( |
| 555 |
'announce', |
| 556 |
array( |
| 557 |
'label' => __( 'Reposts', 'activitypub' ), |
| 558 |
'singular' => __( 'Repost', 'activitypub' ), |
| 559 |
'description' => __( 'A repost on the indieweb is a post that is purely a 100% re-publication of another (typically someone else\'s) post.', 'activitypub' ), |
| 560 |
'icon' => '♻️', |
| 561 |
'class' => 'p-repost', |
| 562 |
'type' => 'repost', |
| 563 |
// translators: %1$s username, %2$s opject format (post, audio, ...), %3$s URL, %4$s domain |
| 564 |
'excerpt' => __( '… reposted this!', 'activitypub' ), |
| 565 |
) |
| 566 |
); |
| 567 |
|
| 568 |
register_comment_type( |
| 569 |
'like', |
| 570 |
array( |
| 571 |
'label' => __( 'Likes', 'activitypub' ), |
| 572 |
'singular' => __( 'Like', 'activitypub' ), |
| 573 |
'description' => __( 'A like is a popular webaction button and in some cases post type on various silos such as Facebook and Instagram.', 'activitypub' ), |
| 574 |
'icon' => '👍', |
| 575 |
'class' => 'p-like', |
| 576 |
'type' => 'like', |
| 577 |
// translators: %1$s username, %2$s opject format (post, audio, ...), %3$s URL, %4$s domain |
| 578 |
'excerpt' => __( '… liked this!', 'activitypub' ), |
| 579 |
) |
| 580 |
); |
| 581 |
} |
| 582 |
|
| 583 |
/** |
| 584 |
* Show avatars on Activities if set |
| 585 |
* |
| 586 |
* @param array $types list of avatar enabled comment types |
| 587 |
* |
| 588 |
* @return array show avatars on Activities |
| 589 |
*/ |
| 590 |
public static function get_avatar_comment_types( $types ) { |
| 591 |
$comment_types = self::get_comment_type_names(); |
| 592 |
$types = array_merge( $types, $comment_types ); |
| 593 |
|
| 594 |
return array_unique( $types ); |
| 595 |
} |
| 596 |
|
| 597 |
/** |
| 598 |
* Excludes likes and reposts from comment queries. |
| 599 |
* |
| 600 |
* @author Jan Boddez |
| 601 |
* |
| 602 |
* @see https://github.com/janboddez/indieblocks/blob/a2d59de358031056a649ee47a1332ce9e39d4ce2/includes/functions.php#L423-L432 |
| 603 |
* |
| 604 |
* @param WP_Comment_Query $query Comment count. |
| 605 |
*/ |
| 606 |
public static function comment_query( $query ) { |
| 607 |
if ( ! $query instanceof WP_Comment_Query ) { |
| 608 |
return; |
| 609 |
} |
| 610 |
|
| 611 |
if ( is_admin() || ! is_singular() ) { |
| 612 |
return; |
| 613 |
} |
| 614 |
|
| 615 |
if ( ! empty( $query->query_vars['type__in'] ) ) { |
| 616 |
return; |
| 617 |
} |
| 618 |
|
| 619 |
if ( isset( $query->query_vars['count'] ) && true === $query->query_vars['count'] ) { |
| 620 |
return; |
| 621 |
} |
| 622 |
|
| 623 |
// Exclude likes and reposts by the Webmention plugin. |
| 624 |
$query->query_vars['type__not_in'] = self::get_comment_type_names(); |
| 625 |
} |
| 626 |
} |
| 627 |
|
