modified file wp-piwik

wp-content/upgrade-temp-backup/plugins/activitypub/includes/handler/class-delete.php

@@ -0,0 +1,196 @@
+<?php
+/**
+ * Delete handler file.
+ *
+ * @package Activitypub
+ */
+
+namespace Activitypub\Handler;
+
+use WP_REST_Request;
+use Activitypub\Http;
+use Activitypub\Collection\Followers;
+use Activitypub\Collection\Interactions;
+
+use function Activitypub\object_to_uri;
+
+/**
+ * Handles Delete requests.
+ */
+class Delete {
+	/**
+	 * Initialize the class, registering WordPress hooks.
+	 */
+	public static function init() {
+		\add_action( 'activitypub_inbox_delete', array( self::class, 'handle_delete' ) );
+		\add_filter( 'activitypub_defer_signature_verification', array( self::class, 'defer_signature_verification' ), 10, 2 );
+		\add_action( 'activitypub_delete_actor_interactions', array( self::class, 'delete_interactions' ) );
+		\add_filter( 'activitypub_get_outbox_activity', array( self::class, 'outbox_activity' ) );
+	}
+
+	/**
+	 * Handles "Delete" requests.
+	 *
+	 * @param array $activity The delete activity.
+	 */
+	public static function handle_delete( $activity ) {
+		$object_type = isset( $activity['object']['type'] ) ? $activity['object']['type'] : '';
+
+		switch ( $object_type ) {
+			/*
+			 * Actor Types.
+			 *
+			 * @see https://www.w3.org/TR/activitystreams-vocabulary/#actor-types
+			 */
+			case 'Person':
+			case 'Group':
+			case 'Organization':
+			case 'Service':
+			case 'Application':
+				self::maybe_delete_follower( $activity );
+				break;
+
+			/*
+			 * Object and Link Types.
+			 *
+			 * @see https://www.w3.org/TR/activitystreams-vocabulary/#object-types
+			 */
+			case 'Note':
+			case 'Article':
+			case 'Image':
+			case 'Audio':
+			case 'Video':
+			case 'Event':
+			case 'Document':
+				self::maybe_delete_interaction( $activity );
+				break;
+
+			/*
+			 * Tombstone Type.
+			 *
+			 * @see: https://www.w3.org/TR/activitystreams-vocabulary/#dfn-tombstone
+			 */
+			case 'Tombstone':
+				self::maybe_delete_interaction( $activity );
+				break;
+
+			/*
+			 * Minimal Activity.
+			 *
+			 * @see https://www.w3.org/TR/activitystreams-core/#example-1
+			 */
+			default:
+				// Ignore non Minimal Activities.
+				if ( ! is_string( $activity['object'] ) ) {
+					return;
+				}
+
+				// Check if Object is an Actor.
+				if ( $activity['actor'] === $activity['object'] ) {
+					self::maybe_delete_follower( $activity );
+				} else { // Assume an interaction otherwise.
+					self::maybe_delete_interaction( $activity );
+				}
+				// Maybe handle Delete Activity for other Object Types.
+				break;
+		}
+	}
+
+	/**
+	 * Delete a Follower if Actor-URL is a Tombstone.
+	 *
+	 * @param array $activity The delete activity.
+	 */
+	public static function maybe_delete_follower( $activity ) {
+		/* @var \Activitypub\Model\Follower $follower Follower object. */
+		$follower = Followers::get_follower_by_actor( $activity['actor'] );
+
+		// Verify that Actor is deleted.
+		if ( $follower && Http::is_tombstone( $activity['actor'] ) ) {
+			$follower->delete();
+			self::maybe_delete_interactions( $activity );
+		}
+	}
+
+	/**
+	 * Delete Reactions if Actor-URL is a Tombstone.
+	 *
+	 * @param array $activity The delete activity.
+	 */
+	public static function maybe_delete_interactions( $activity ) {
+		// Verify that Actor is deleted.
+		if ( Http::is_tombstone( $activity['actor'] ) ) {
+			\wp_schedule_single_event(
+				\time(),
+				'activitypub_delete_actor_interactions',
+				array( $activity['actor'] )
+			);
+		}
+	}
+
+	/**
+	 * Delete comments from an Actor.
+	 *
+	 * @param string $actor The URL of the actor whose comments to delete.
+	 */
+	public static function delete_interactions( $actor ) {
+		$comments = Interactions::get_interactions_by_actor( $actor );
+
+		foreach ( $comments as $comment ) {
+			wp_delete_comment( $comment, true );
+		}
+	}
+
+	/**
+	 * Delete a Reaction if URL is a Tombstone.
+	 *
+	 * @param array $activity The delete activity.
+	 */
+	public static function maybe_delete_interaction( $activity ) {
+		if ( is_array( $activity['object'] ) ) {
+			$id = $activity['object']['id'];
+		} else {
+			$id = $activity['object'];
+		}
+
+		$comments = Interactions::get_interaction_by_id( $id );
+
+		if ( $comments && Http::is_tombstone( $id ) ) {
+			foreach ( $comments as $comment ) {
+				wp_delete_comment( $comment->comment_ID, true );
+			}
+		}
+	}
+
+	/**
+	 * Defer signature verification for `Delete` requests.
+	 *
+	 * @param bool            $defer   Whether to defer signature verification.
+	 * @param WP_REST_Request $request The request object.
+	 *
+	 * @return bool Whether to defer signature verification.
+	 */
+	public static function defer_signature_verification( $defer, $request ) {
+		$json = $request->get_json_params();
+
+		if ( isset( $json['type'] ) && 'Delete' === $json['type'] ) {
+			return true;
+		}
+
+		return false;
+	}
+
+	/**
+	 * Set the object to the object ID.
+	 *
+	 * @param \Activitypub\Activity\Activity $activity The Activity object.
+	 * @return \Activitypub\Activity\Activity The filtered Activity object.
+	 */
+	public static function outbox_activity( $activity ) {
+		if ( 'Delete' === $activity->get_type() ) {
+			$activity->set_object( object_to_uri( $activity->get_object() ) );
+		}
+
+		return $activity;
+	}
+}