Follow.php 2.2 KB

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  1. <?php
  2. /**
  3. * GNU social - a federating social network
  4. *
  5. * ActivityPubPlugin implementation for GNU Social
  6. *
  7. * LICENCE: This program is free software: you can redistribute it and/or modify
  8. * it under the terms of the GNU Affero General Public License as published by
  9. * the Free Software Foundation, either version 3 of the License, or
  10. * (at your option) any later version.
  11. *
  12. * This program is distributed in the hope that it will be useful,
  13. * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14. * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  15. * GNU Affero General Public License for more details.
  16. *
  17. * You should have received a copy of the GNU Affero General Public License
  18. * along with this program. If not, see <http://www.gnu.org/licenses/>.
  19. *
  20. * @category Plugin
  21. * @package GNUsocial
  22. * @author Diogo Cordeiro <diogo@fc.up.pt>
  23. * @author Daniel Supernault <danielsupernault@gmail.com>
  24. * @copyright 2018 Free Software Foundation http://fsf.org
  25. * @license http://www.fsf.org/licensing/licenses/agpl-3.0.html GNU Affero General Public License version 3.0
  26. * @link https://www.gnu.org/software/social/
  27. */
  28. if (!defined ('GNUSOCIAL')) {
  29. exit (1);
  30. }
  31. // Validate Object
  32. if (!is_string ($data->object)) {
  33. ActivityPubReturn::error ("Invalid Object object, URL expected.");
  34. }
  35. // Get valid Object profile
  36. try {
  37. $object_profile = new Activitypub_explorer;
  38. $object_profile = $object_profile->lookup ($data->object)[0];
  39. } catch(Exception $e) {
  40. ActivityPubReturn::error ("Invalid Object Actor URL.", 404);
  41. }
  42. try {
  43. if (!Subscription::exists ($actor_profile, $object_profile)) {
  44. Subscription::start ($actor_profile, $object_profile);
  45. $res = array ("@context" => "https://www.w3.org/ns/activitystreams",
  46. "type" => "Follow",
  47. "actor" => $data->actor,
  48. "object" => $data->object);
  49. ActivityPubReturn::answer ($res);
  50. } else {
  51. ActivityPubReturn::error ("Already following.", 409);
  52. }
  53. } catch (Exception $e) {
  54. ActivityPubReturn::error ("Invalid Object Actor URL.", 404);
  55. }