Merge pull request #10114 from tobiasd/20210402-lng

[friendica.git] / src / Module / Objects.php

diff --git a/src/Module/Objects.php b/src/Module/Objects.php
index 0f2536bcc96c400e3a5e5788708bb16acaea41e2..8f1bbf2a5f7a1bb6d3f99a2e520c64d0b441a247 100644 (file)
--- a/src/Module/Objects.php
+++ b/src/Module/Objects.php
@@ -1,6 +1,6 @@
 <?php
 /**
- * @copyright Copyright (C) 2020, Friendica
+ * @copyright Copyright (C) 2010-2021, the Friendica project
  *
  * @license GNU AGPL version 3 or any later version
  *
@@ -22,13 +22,18 @@
 namespace Friendica\Module;
 
 use Friendica\BaseModule;
+use Friendica\Core\Logger;
 use Friendica\Core\System;
 use Friendica\Database\DBA;
 use Friendica\DI;
+use Friendica\Model\Contact;
 use Friendica\Model\Item;
+use Friendica\Model\Post;
 use Friendica\Network\HTTPException;
 use Friendica\Protocol\ActivityPub;
+use Friendica\Util\HTTPSignature;
 use Friendica\Util\Network;
+use Friendica\Util\Strings;
 
 /**
  * ActivityPub Objects
@@ -45,19 +50,59 @@ class Objects extends BaseModule
                        DI::baseUrl()->redirect(str_replace('objects/', 'display/', DI::args()->getQueryString()));
                }
 
-               /// @todo Add Authentication to enable fetching of non public content
-               // $requester = HTTPSignature::getSigner('', $_SERVER);
-
-               $item = Item::selectFirst(
-                       ['id', 'origin', 'author-link', 'changed'],
-                       [
-                               'guid' => $parameters['guid'],
-                               'private' => [Item::PUBLIC, Item::UNLISTED]
-                       ],
-                       ['order' => ['origin' => true]]
-               );
-               // Valid items are original post or posted from this node (including in the case of a forum)
-               if (!DBA::isResult($item) || !$item['origin'] && !strstr($item['author-link'], DI::baseUrl()->get())) {
+               $itemuri = DBA::selectFirst('item-uri', ['id'], ['guid' => $parameters['guid']]);
+
+               if (DBA::isResult($itemuri)) {
+                       Logger::info('Provided GUID found.', ['guid' => $parameters['guid'], 'uri-id' => $itemuri['id']]);
+               } else {
+                       // The item URI does not always contain the GUID. This means that we have to search the URL instead
+                       $url = DI::baseUrl()->get() . '/' . DI::args()->getQueryString();
+                       $nurl = Strings::normaliseLink($url);
+                       $ssl_url = str_replace('http://', 'https://', $nurl);
+
+                       $itemuri = DBA::selectFirst('item-uri', ['guid', 'id'], ['uri' => [$url, $nurl, $ssl_url]]);
+                       if (DBA::isResult($itemuri)) {
+                               Logger::info('URL found.', ['url' => $url, 'guid' => $itemuri['guid'], 'uri-id' => $itemuri['id']]);
+                       } else {
+                               Logger::info('URL not found.', ['url' => $url]);
+                               throw new HTTPException\NotFoundException();
+                       }
+               }
+
+               $item = Post::selectFirst(['id', 'uid', 'origin', 'author-link', 'changed', 'private', 'psid', 'gravity', 'deleted', 'parent-uri-id'],
+                       ['uri-id' => $itemuri['id']], ['order' => ['origin' => true]]);
+
+               if (!DBA::isResult($item)) {
+                       throw new HTTPException\NotFoundException();
+               }
+
+               $validated = in_array($item['private'], [Item::PUBLIC, Item::UNLISTED]);
+
+               if (!$validated) {
+                       $requester = HTTPSignature::getSigner('', $_SERVER);
+                       if (!empty($requester) && $item['origin']) {
+                               $requester_id = Contact::getIdForURL($requester, $item['uid']);
+                               if (!empty($requester_id)) {
+                                       $permissionSets = DI::permissionSet()->selectByContactId($requester_id, $item['uid']);
+                                       if (!empty($permissionSets)) {
+                                               $psid = array_merge($permissionSets->column('id'),
+                                                       [DI::permissionSet()->getIdFromACL($item['uid'], '', '', '', '')]);
+                                               $validated = in_array($item['psid'], $psid);
+                                       }
+                               }
+                       }
+               }
+
+               if ($validated) {
+                       // Valid items are original post or posted from this node (including in the case of a forum)
+                       $validated = ($item['origin'] || (parse_url($item['author-link'], PHP_URL_HOST) == parse_url(DI::baseUrl()->get(), PHP_URL_HOST)));
+
+                       if (!$validated && $item['deleted']) {
+                               $validated = Post::exists(['origin' => true, 'uri-id' => $item['parent-uri-id']]);
+                       }
+               }
+
+               if (!$validated) {
                        throw new HTTPException\NotFoundException();
                }
 
@@ -65,17 +110,38 @@ class Objects extends BaseModule
                $last_modified = $item['changed'];
                Network::checkEtagModified($etag, $last_modified);
 
-               $activity = ActivityPub\Transmitter::createActivityFromItem($item['id'], true);
-               $activity['type'] = $activity['type'] == 'Update' ? 'Create' : $activity['type'];
+               if (empty($parameters['activity']) && ($item['gravity'] != GRAVITY_ACTIVITY)) {
+                       $activity = ActivityPub\Transmitter::createActivityFromItem($item['id'], true);
+                       if (empty($activity['type'])) {
+                               throw new HTTPException\NotFoundException();
+                       }
+
+                       $activity['type'] = $activity['type'] == 'Update' ? 'Create' : $activity['type'];
 
-               // Only display "Create" activity objects here, no reshares or anything else
-               if (empty($activity['object']) || ($activity['type'] != 'Create')) {
+                       // Only display "Create" activity objects here, no reshares or anything else
+                       if (empty($activity['object']) || ($activity['type'] != 'Create')) {
+                               throw new HTTPException\NotFoundException();
+                       }
+
+                       $data = ['@context' => ActivityPub::CONTEXT];
+                       $data = array_merge($data, $activity['object']);
+               } elseif (empty($parameters['activity']) || in_array($parameters['activity'],
+                       ['Create', 'Announce', 'Update', 'Like', 'Dislike', 'Accept', 'Reject',
+                       'TentativeAccept', 'Follow', 'Add'])) {
+                       $data = ActivityPub\Transmitter::createActivityFromItem($item['id']);
+                       if (empty($data)) {
+                               throw new HTTPException\NotFoundException();
+                       }
+                       if (!empty($parameters['activity']) && ($parameters['activity'] != 'Create')) {
+                               $data['type'] = $parameters['activity'];
+                               $data['id'] = str_replace('/Create', '/' . $parameters['activity'], $data['id']);
+                       }
+               } else {
                        throw new HTTPException\NotFoundException();
                }
 
-               $data = ['@context' => ActivityPub::CONTEXT];
-               $data = array_merge($data, $activity['object']);
-
+               // Relaxed CORS header for public items
+               header('Access-Control-Allow-Origin: *');
                System::jsonExit($data, 'application/activity+json');
        }
 }