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\Protocol\ActivityPub;
   9 use Friendica\Core\System;
  10 use Friendica\Model\Item;
  11 use Friendica\Database\DBA;
  12 use Friendica\Util\HTTPSignature;
  13
  14 /**
  15  * ActivityPub Objects
  16  */
  17 class Objects extends BaseModule
  18 {
  19         public static function rawContent()
  20         {
  21                 $a = self::getApp();
  22
  23                 if (empty($a->argv[1])) {
  24                         System::httpExit(404);
  25                 }
  26
  27                 if (!ActivityPub::isRequest()) {
  28                         $a->internalRedirect(str_replace('objects/', 'display/', $a->query_string));
  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                 $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                         $item = Item::selectFirst(['id', 'author-link'], ['guid' => $a->argv[1], 'private' => false]);
  39                         if (!DBA::isResult($item) || !strstr($item['author-link'], System::baseUrl())) {
  40                                 System::httpExit(404);
  41                         }
  42                 }
  43
  44                 $data = ActivityPub\Transmitter::createObjectFromItemID($item['id']);
  45
  46                 header('Content-Type: application/activity+json');
  47                 echo json_encode($data);
  48                 exit();
  49         }
  50 }