protected function prepare_links( $thread ) {
		$base = sprintf( '/%s/%s/', $this->namespace, $this->rest_base );

		// Entity meta.
		$links = array(
			'self'       => array(
				'href' => rest_url( $base . $thread->thread_id ),
			),
			'collection' => array(
				'href' => rest_url( $base ),
			),
		);

		// Add star links for each message of the thread.
		if ( bp_is_active( 'messages', 'star' ) ) {
			$starred_base = $base . bp_get_messages_starred_slug() . '/';

			foreach ( $thread->messages as $message ) {
				$links[ $message->id ] = array(
					'href' => rest_url( $starred_base . $message->id ),
				);
			}
		}

		/**
		 * Filter links prepared for the REST response.
		 *
		 * @since 5.0.0
		 *
		 * @param array              $links   The prepared links of the REST response.
		 * @param BP_Messages_Thread $thread  Thread object.
		 */
		return apply_filters( 'bp_rest_messages_prepare_links', $links, $thread );
	}