pixelfed/app/Transformer/ActivityPub/StatusTransformer.php

<?php

namespace App\Transformer\ActivityPub;

use App\{Profile, Status};
use League\Fractal;

class StatusTransformer extends Fractal\TransformerAbstract
{

  public function transform(Status $status)
  {
      return [
          '@context' => [
            'https://www.w3.org/ns/activitystreams',
            'https://w3id.org/security/v1',
            [
              "manuallyApprovesFollowers" => "as:manuallyApprovesFollowers",
              "featured" => [
                "https://pixelfed.org/ns#featured" => ["@type" => "@id"],
              ]
            ]
          ],
          'id' => $status->url(),

          // TODO: handle other types
          'type' => 'Note',

          // XXX: CW Title
          'summary' => null,
          'content' => $status->rendered ?? $status->caption,
          'inReplyTo' => null,

          // TODO: fix date format
          'published' => $status->created_at->toAtomString(),
          'url' => $status->url(),
          'attributedTo' => $status->profile->permalink(),
          'to' => [
            // TODO: handle proper scope
            'https://www.w3.org/ns/activitystreams#Public'
          ],
          'cc' => [
            // TODO: add cc's
            $status->profile->permalink('/followers'),
          ],
          'sensitive' => (bool) $status->is_nsfw,
          'atomUri' => $status->url(),
          'inReplyToAtomUri' => null,
          'attachment' => $status->media->map(function($media) {
            return [
              'type' => 'Document',
              'mediaType' => $media->mime,
              'url' => $media->url(),
              'name' => null
            ];
          }),
          'tag' => []
      ];
  }

}