src/Module/Objects.php

   1 <?php
   2 /**
   3  * @file src/Module/Objects.php
   4  */
   5 namespace Friendica\Module;
   6
   7 use Friendica\BaseModule;
   8 use Friendica\Database\DBA;
   9 use Friendica\DI;
  10 use Friendica\Model\Item;
  11 use Friendica\Protocol\ActivityPub;
  12
  13 /**
  14  * ActivityPub Objects
  15  */
  16 class Objects extends BaseModule
  17 {
  18         public static function rawContent(array $parameters = [])
  19         {
  20                 $a = DI::app();
  21
  22                 if (empty($a->argv[1])) {
  23                         throw new \Friendica\Network\HTTPException\NotFoundException();
  24                 }
  25
  26                 if (!ActivityPub::isRequest()) {
  27                         DI::baseUrl()->redirect(str_replace('objects/', 'display/', DI::args()->getQueryString()));
  28                 }
  29
  30                 /// @todo Add Authentication to enable fetching of non public content
  31                 // $requester = HTTPSignature::getSigner('', $_SERVER);
  32
  33                 // At first we try the original post with that guid
  34                 // @TODO: Replace with parameter from router
  35                 $item = Item::selectFirst(['id'], ['guid' => $a->argv[1], 'origin' => true, 'private' => false]);
  36                 if (!DBA::isResult($item)) {
  37                         // If no original post could be found, it could possibly be a forum post, there we remove the "origin" field.
  38                         // @TODO: Replace with parameter from router
  39                         $item = Item::selectFirst(['id', 'author-link'], ['guid' => $a->argv[1], 'private' => false]);
  40                         if (!DBA::isResult($item) || !strstr($item['author-link'], DI::baseUrl()->get())) {
  41                                 throw new \Friendica\Network\HTTPException\NotFoundException();
  42                         }
  43                 }
  44
  45                 $activity = ActivityPub\Transmitter::createActivityFromItem($item['id'], true);
  46                 // Only display "Create" activity objects here, no reshares or anything else
  47                 if (!is_array($activity['object']) || ($activity['type'] != 'Create')) {
  48                         throw new \Friendica\Network\HTTPException\NotFoundException();
  49                 }
  50
  51                 $data = ['@context' => ActivityPub::CONTEXT];
  52                 $data = array_merge($data, $activity['object']);
  53
  54                 header('Content-Type: application/activity+json');
  55                 echo json_encode($data);
  56                 exit();
  57         }
  58 }