pixelfed/app/Transformer/ActivityPub/Verb/UndoAnnounce.php

<?php

namespace App\Transformer\ActivityPub\Verb;

use App\Status;
use League\Fractal;

class UndoAnnounce extends Fractal\TransformerAbstract
{
	public function transform(Status $status)
	{
		return [
			'@context'  => 'https://www.w3.org/ns/activitystreams',
			'id'		=> $status->permalink('/undo'),
			'actor'		=> $status->profile->permalink(),
			'type'		=> 'Undo',
			'object' 	=> [
				'id'		=> $status->permalink(),
				'type' 		=> 'Announce',
				'actor'		=> $status->profile->permalink(),
				'to' 		=> ['https://www.w3.org/ns/activitystreams#Public'],
				'cc' 		=> [
					$status->profile->permalink(),
					$status->profile->follower_url ?? $status->profile->permalink('/followers')
				],
				'published' => $status->created_at->format(DATE_ISO8601),
				'object'	=> $status->parent()->url(),
			]
		];
	}
}