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\Core\System;
   9 use Friendica\Database\DBA;
  10 use Friendica\DI;
  11 use Friendica\Model\Item;
  12 use Friendica\Protocol\ActivityPub;
  13
  14 /**
  15  * ActivityPub Objects
  16  */
  17 class Objects extends BaseModule
  18 {
  19         public static function rawContent(array $parameters = [])
  20         {
  21                 $a = DI::app();
  22
  23                 if (empty($a->argv[1])) {
  24                         throw new \Friendica\Network\HTTPException\NotFoundException();
  25                 }
  26
  27                 if (!ActivityPub::isRequest()) {
  28                         DI::baseUrl()->redirect(str_replace('objects/', 'display/', DI::args()->getQueryString()));
  29                 }
  30
  31                 /// @todo Add Authentication to enable fetching of non public content
  32                 // $requester = HTTPSignature::getSigner('', $_SERVER);
  33
  34                 // At first we try the original post with that guid
  35                 // @TODO: Replace with parameter from router
  36                 $item = Item::selectFirst(['id'], ['guid' => $a->argv[1], 'origin' => true, 'private' => false]);
  37                 if (!DBA::isResult($item)) {
  38                         // If no original post could be found, it could possibly be a forum post, there we remove the "origin" field.
  39                         // @TODO: Replace with parameter from router
  40                         $item = Item::selectFirst(['id', 'author-link'], ['guid' => $a->argv[1], 'private' => false]);
  41                         if (!DBA::isResult($item) || !strstr($item['author-link'], System::baseUrl())) {
  42                                 throw new \Friendica\Network\HTTPException\NotFoundException();
  43                         }
  44                 }
  45
  46                 $activity = ActivityPub\Transmitter::createActivityFromItem($item['id'], true);
  47                 // Only display "Create" activity objects here, no reshares or anything else
  48                 if (!is_array($activity['object']) || ($activity['type'] != 'Create')) {
  49                         throw new \Friendica\Network\HTTPException\NotFoundException();
  50                 }
  51
  52                 $data = ['@context' => ActivityPub::CONTEXT];
  53                 $data = array_merge($data, $activity['object']);
  54
  55                 header('Content-Type: application/activity+json');
  56                 echo json_encode($data);
  57                 exit();
  58         }
  59 }