]> git.mxchange.org Git - friendica.git/blobdiff - src/Protocol/ActivityPub.php
We can delete notes / changed credits
[friendica.git] / src / Protocol / ActivityPub.php
index 7205f5ab92551b3dbfe07fabbf037c740a241cc6..4d7657865c226e3c19bfd7921cd28504df0a4363 100644 (file)
@@ -34,20 +34,16 @@ use Friendica\Util\LDSignature;
  *
  * Digest: https://tools.ietf.org/html/rfc5843
  * https://tools.ietf.org/html/draft-cavage-http-signatures-10#ref-15
- * https://github.com/digitalbazaar/php-json-ld
- *
- * Part of the code for HTTP signing is taken from the Osada project.
- * https://framagit.org/macgirvin/osada
  *
  * To-do:
  *
  * Receiver:
- * - Activities: Dislike, Update, Delete
+ * - Activities: Update, Delete (Activities/Notes)
  * - Object Types: Person, Tombstome
  *
  * Transmitter:
- * - Activities: Like, Dislike, Update, Delete, Announce
- * - Object Tyoes: Article, Person, Tombstone
+ * - Activities: Announce
+ * - Object Tyoes: Person
  *
  * General:
  * - Endpoints: Outbox, Follower, Following
@@ -139,6 +135,13 @@ class ActivityPub
                $actor = JsonLD::fetchElement($activity, 'actor', 'id');
                $profile = ActivityPub::fetchprofile($actor);
 
+               $item_profile = ActivityPub::fetchprofile($item['author-link']);
+               $exclude[] = $item['author-link'];
+
+               if ($item['gravity'] == GRAVITY_PARENT) {
+                       $exclude[] = $item['owner-link'];
+               }
+
                $permissions = [];
 
                $elements = ['to', 'cc', 'bto', 'bcc'];
@@ -150,10 +153,12 @@ class ActivityPub
                                $activity[$element] = [$activity[$element]];
                        }
                        foreach ($activity[$element] as $receiver) {
-                               if ($receiver == $profile['followers']) {
-                                       $receiver = System::baseUrl() . '/followers/' . $item['author-nick'];
+                               if ($receiver == $profile['followers'] && !empty($item_profile['followers'])) {
+                                       $receiver = $item_profile['followers'];
+                               }
+                               if (!in_array($receiver, $exclude)) {
+                                       $permissions[$element][] = $receiver;
                                }
-                               $permissions[$element][] = $receiver;
                        }
                }
                return $permissions;
@@ -165,27 +170,32 @@ class ActivityPub
 
                $data = array_merge($data, self::fetchPermissionBlockFromConversation($item));
 
+               $actor_profile = ActivityPub::fetchprofile($item['author-link']);
+
                $terms = Term::tagArrayFromItemId($item['id']);
 
+               $contacts[$item['author-link']] = $item['author-link'];
+
                if (!$item['private']) {
                        $data['to'][] = self::PUBLIC;
-                       $data['cc'][] = System::baseUrl() . '/followers/' . $item['author-nick'];
+                       if (!empty($actor_profile['followers'])) {
+                               $data['cc'][] = $actor_profile['followers'];
+                       }
 
                        foreach ($terms as $term) {
                                if ($term['type'] != TERM_MENTION) {
                                        continue;
                                }
                                $profile = self::fetchprofile($term['url']);
-                               if (!empty($profile)) {
+                               if (!empty($profile) && empty($contacts[$profile['url']])) {
                                        $data['cc'][] = $profile['url'];
+                                       $contacts[$profile['url']] = $profile['url'];
                                }
                        }
                } else {
-                       //$data['cc'][] = System::baseUrl() . '/followers/' . $item['author-nick'];
                        $receiver_list = Item::enumeratePermissions($item);
 
                        $mentioned = [];
-                       $contacts = [];
 
                        foreach ($terms as $term) {
                                if ($term['type'] != TERM_MENTION) {
@@ -206,135 +216,105 @@ class ActivityPub
                                        $contacts[$contact['url']] = $contact['url'];
                                }
                        }
+               }
+
+               $parents = Item::select(['author-link', 'owner-link', 'gravity'], ['parent' => $item['parent']]);
+               while ($parent = Item::fetch($parents)) {
+                       $profile = self::fetchprofile($parent['author-link']);
+                       if (!empty($profile) && empty($contacts[$profile['url']])) {
+                               $data['cc'][] = $profile['url'];
+                               $contacts[$profile['url']] = $profile['url'];
+                       }
 
-                       if (empty($data['to'])) {
-                               $data['to'] = $data['cc'];
-                               $data['cc'] = [];
+                       if ($item['gravity'] != GRAVITY_PARENT) {
+                               continue;
                        }
+
+                       $profile = self::fetchprofile($parent['owner-link']);
+                       if (!empty($profile) && empty($contacts[$profile['url']])) {
+                               $data['cc'][] = $profile['url'];
+                               $contacts[$profile['url']] = $profile['url'];
+                       }
+               }
+               DBA::close($parents);
+
+               if (empty($data['to'])) {
+                       $data['to'] = $data['cc'];
+                       $data['cc'] = [];
                }
 
                return $data;
        }
 
-       private static function fetchTargetInboxesFromConversation($item)
+       public static function fetchTargetInboxes($item, $uid)
        {
-               if (empty($item['thr-parent'])) {
-                       return [];
-               }
-
-               $condition = ['item-uri' => $item['thr-parent'], 'protocol' => Conversation::PARCEL_ACTIVITYPUB];
-               $conversation = DBA::selectFirst('conversation', ['source'], $condition);
-               if (!DBA::isResult($conversation)) {
+               $permissions = self::createPermissionBlockForItem($item);
+               if (empty($permissions)) {
                        return [];
                }
 
-               $activity = json_decode($conversation['source'], true);
-
-               $actor = JsonLD::fetchElement($activity, 'actor', 'id');
-               $profile = ActivityPub::fetchprofile($actor);
-
                $inboxes = [];
 
+               if ($item['gravity'] == GRAVITY_ACTIVITY) {
+                       $item_profile = ActivityPub::fetchprofile($item['author-link']);
+               } else {
+                       $item_profile = ActivityPub::fetchprofile($item['owner-link']);
+               }
+
                $elements = ['to', 'cc', 'bto', 'bcc'];
                foreach ($elements as $element) {
-                       if (empty($activity[$element])) {
+                       if (empty($permissions[$element])) {
                                continue;
                        }
-                       if (is_string($activity[$element])) {
-                               $activity[$element] = [$activity[$element]];
-                       }
-                       foreach ($activity[$element] as $receiver) {
-                               $profile = self::fetchprofile($receiver);
-                               if (!empty($profile)) {
-                                       $target = defaults($profile, 'sharedinbox', $profile['inbox']);
-                                       $inboxes[$target] = $target;
-                               }
-                       }
-               }
-               return $inboxes;
-       }
-
-       public static function fetchTargetInboxes($item, $uid)
-       {
-               $inboxes = self::fetchTargetInboxesFromConversation($item);
-
-               $parents = Item::select(['author-link', 'owner-link'], ['parent' => $item['parent']]);
-               while ($parent = Item::fetch($parents)) {
-                       $profile = self::fetchprofile($parent['author-link']);
-                       if (!empty($profile)) {
-                               $target = defaults($profile, 'sharedinbox', $profile['inbox']);
-                               $inboxes[$target] = $target;
-                       }
-                       $profile = self::fetchprofile($parent['owner-link']);
-                       if (!empty($profile)) {
-                               $target = defaults($profile, 'sharedinbox', $profile['inbox']);
-                               $inboxes[$target] = $target;
-                       }
-               }
-               DBA::close($parents);
-
-               $terms = Term::tagArrayFromItemId($item['id']);
-               if (!$item['private']) {
-                       $contacts = DBA::select('contact', ['notify', 'batch'], ['uid' => $uid,
-                                       'rel' => [Contact::FOLLOWER, Contact::FRIEND], 'network' => Protocol::ACTIVITYPUB]);
-                       while ($contact = DBA::fetch($contacts)) {
-                               $contact = defaults($contact, 'batch', $contact['notify']);
-                               $inboxes[$contact] = $contact;
-                       }
-                       DBA::close($contacts);
-
-                       foreach ($terms as $term) {
-                               if ($term['type'] != TERM_MENTION) {
-                                       continue;
-                               }
-                               $profile = self::fetchprofile($term['url']);
-                               if (!empty($profile)) {
-                                       $target = defaults($profile, 'sharedinbox', $profile['inbox']);
-                                       $inboxes[$target] = $target;
-                               }
-                       }
-               } else {
-                       $receiver_list = Item::enumeratePermissions($item);
-                       $mentioned = [];
 
-                       foreach ($terms as $term) {
-                               if ($term['type'] != TERM_MENTION) {
-                                       continue;
-                               }
-                               $cid = Contact::getIdForURL($term['url'], $uid);
-                               if (!empty($cid) && in_array($cid, $receiver_list)) {
-                                       $contact = DBA::selectFirst('contact', ['url'], ['id' => $cid, 'network' => Protocol::ACTIVITYPUB]);
-                                       $profile = self::fetchprofile($contact['url']);
+                       foreach ($permissions[$element] as $receiver) {
+                               if ($receiver == $item_profile['followers']) {
+                                       $contacts = DBA::select('contact', ['notify', 'batch'], ['uid' => $uid,
+                                               'rel' => [Contact::FOLLOWER, Contact::FRIEND], 'network' => Protocol::ACTIVITYPUB]);
+                                       while ($contact = DBA::fetch($contacts)) {
+                                               $contact = defaults($contact, 'batch', $contact['notify']);
+                                               $inboxes[$contact] = $contact;
+                                       }
+                                       DBA::close($contacts);
+                               } else {
+                                       $profile = self::fetchprofile($receiver);
                                        if (!empty($profile)) {
                                                $target = defaults($profile, 'sharedinbox', $profile['inbox']);
                                                $inboxes[$target] = $target;
                                        }
                                }
                        }
-
-                       foreach ($receiver_list as $receiver) {
-                               $contact = DBA::selectFirst('contact', ['url'], ['id' => $receiver, 'network' => Protocol::ACTIVITYPUB]);
-                               $profile = self::fetchprofile($contact['url']);
-                               if (!empty($profile)) {
-                                       $target = defaults($profile, 'sharedinbox', $profile['inbox']);
-                                       $inboxes[$target] = $target;
-                               }
-                       }
                }
 
-               $profile = self::fetchprofile($item['author-link']);
-               if (!empty($profile['sharedinbox'])) {
-                       unset($inboxes[$profile['sharedinbox']]);
-               }
+               return $inboxes;
+       }
 
-               if (!empty($profile['inbox'])) {
-                       unset($inboxes[$profile['inbox']]);
+       public static function getTypeOfItem($item)
+       {
+               if ($item['verb'] == ACTIVITY_POST) {
+                       if ($item['created'] == $item['edited']) {
+                               $type = 'Create';
+                       } else {
+                               $type = 'Update';
+                       }
+               } elseif ($item['verb'] == ACTIVITY_LIKE) {
+                       $type = 'Like';
+               } elseif ($item['verb'] == ACTIVITY_DISLIKE) {
+                       $type = 'Dislike';
+               } elseif ($item['verb'] == ACTIVITY_ATTEND) {
+                       $type = 'Accept';
+               } elseif ($item['verb'] == ACTIVITY_ATTENDNO) {
+                       $type = 'Reject';
+               } elseif ($item['verb'] == ACTIVITY_ATTENDMAYBE) {
+                       $type = 'TentativeAccept';
+               } else {
+                       $type = '';
                }
 
-               return $inboxes;
+               return $type;
        }
 
-       public static function createActivityFromItem($item_id)
+       public static function createActivityFromItem($item_id, $object_mode = false)
        {
                $item = Item::selectFirst([], ['id' => $item_id]);
 
@@ -351,14 +331,26 @@ class ActivityPub
                        }
                }
 
-               $data = ['@context' => ['https://www.w3.org/ns/activitystreams', 'https://w3id.org/security/v1',
-                       ['ostatus' => 'http://ostatus.org#', 'sensitive' => 'as:sensitive',
-                       'Hashtag' => 'as:Hashtag', 'atomUri' => 'ostatus:atomUri',
-                       'conversation' => 'ostatus:conversation',
-                       'inReplyToAtomUri' => 'ostatus:inReplyToAtomUri']]];
+               $type = self::getTypeOfItem($item);
+
+               if (!$object_mode) {
+                       $data = ['@context' => ['https://www.w3.org/ns/activitystreams', 'https://w3id.org/security/v1',
+                               ['ostatus' => 'http://ostatus.org#', 'uuid' => 'http://schema.org/identifier',
+                               'sensitive' => 'as:sensitive', 'Hashtag' => 'as:Hashtag',
+                               'atomUri' => 'ostatus:atomUri', 'conversation' => 'ostatus:conversation',
+                               'inReplyToAtomUri' => 'ostatus:inReplyToAtomUri']]];
+
+                       if ($item['deleted'] && ($item['gravity'] == GRAVITY_ACTIVITY)) {
+                               $type = 'Undo';
+                       } elseif ($item['deleted']) {
+                               $type = 'Delete';
+                       }
+               } else {
+                       $data = [];
+               }
 
-               $data['id'] = $item['uri'] . '#activity';
-               $data['type'] = 'Create';
+               $data['id'] = $item['uri'] . '#' . $type;
+               $data['type'] = $type;
                $data['actor'] = $item['author-link'];
 
                $data['published'] = DateTimeFormat::utc($item["created"]."+00:00", DateTimeFormat::ATOM);
@@ -367,13 +359,25 @@ class ActivityPub
                        $data['updated'] = DateTimeFormat::utc($item["edited"]."+00:00", DateTimeFormat::ATOM);
                }
 
+               $data['context'] = self::createConversationURLFromItem($item);
+
                $data = array_merge($data, ActivityPub::createPermissionBlockForItem($item));
 
-               $data['object'] = self::createNote($item);
+               if (in_array($data['type'], ['Create', 'Update', 'Announce', 'Delete'])) {
+                       $data['object'] = self::CreateNote($item);
+               } elseif ($data['type'] == 'Undo') {
+                       $data['object'] = self::createActivityFromItem($item_id, true);
+               } else {
+                       $data['object'] = $item['thr-parent'];
+               }
 
                $owner = User::getOwnerDataById($item['uid']);
 
-               return LDSignature::sign($data, $owner);
+               if (!$object_mode) {
+                       return LDSignature::sign($data, $owner);
+               } else {
+                       return $data;
+               }
        }
 
        public static function createObjectFromItemID($item_id)
@@ -385,12 +389,12 @@ class ActivityPub
                }
 
                $data = ['@context' => ['https://www.w3.org/ns/activitystreams', 'https://w3id.org/security/v1',
-                       ['ostatus' => 'http://ostatus.org#', 'sensitive' => 'as:sensitive',
-                       'Hashtag' => 'as:Hashtag', 'atomUri' => 'ostatus:atomUri',
-                       'conversation' => 'ostatus:conversation',
+                       ['ostatus' => 'http://ostatus.org#', 'uuid' => 'http://schema.org/identifier',
+                       'sensitive' => 'as:sensitive', 'Hashtag' => 'as:Hashtag',
+                       'atomUri' => 'ostatus:atomUri', 'conversation' => 'ostatus:conversation',
                        'inReplyToAtomUri' => 'ostatus:inReplyToAtomUri']]];
 
-               $data = array_merge($data, self::createNote($item));
+               $data = array_merge($data, self::CreateNote($item));
 
 
                return $data;
@@ -413,15 +417,40 @@ class ActivityPub
                                $tags[] = ['type' => 'Mention', 'href' => $term['url'], 'name' => $mention];
                        }
                }
-
                return $tags;
        }
 
-       public static function createNote($item)
+       private static function createConversationURLFromItem($item)
        {
+               $conversation = DBA::selectFirst('conversation', ['conversation-uri'], ['item-uri' => $item['parent-uri']]);
+               if (DBA::isResult($conversation) && !empty($conversation['conversation-uri'])) {
+                       $conversation_uri = $conversation['conversation-uri'];
+               } else {
+                       $conversation_uri = $item['parent-uri'];
+               }
+               return $conversation_uri;
+       }
+
+       private static function CreateNote($item)
+       {
+               if (!empty($item['title'])) {
+                       $type = 'Article';
+               } else {
+                       $type = 'Note';
+               }
+
+               if ($item['deleted']) {
+                       $type = 'Tombstone';
+               }
+
                $data = [];
                $data['id'] = $item['uri'];
-               $data['type'] = 'Note';
+               $data['type'] = $type;
+
+               if ($item['deleted']) {
+                       return $data;
+               }
+
                $data['summary'] = null; // Ignore by now
 
                if ($item['uri'] != $item['thr-parent']) {
@@ -430,25 +459,18 @@ class ActivityPub
                        $data['inReplyTo'] = null;
                }
 
+               $data['uuid'] = $item['guid'];
                $data['published'] = DateTimeFormat::utc($item["created"]."+00:00", DateTimeFormat::ATOM);
 
                if ($item["created"] != $item["edited"]) {
                        $data['updated'] = DateTimeFormat::utc($item["edited"]."+00:00", DateTimeFormat::ATOM);
                }
 
-               $data['url'] = $item['uri'];
+               $data['url'] = $item['plink'];
                $data['attributedTo'] = $item['author-link'];
                $data['actor'] = $item['author-link'];
                $data['sensitive'] = false; // - Query NSFW
-
-               $conversation = DBA::selectFirst('conversation', ['conversation-uri'], ['item-uri' => $item['parent-uri']]);
-               if (DBA::isResult($conversation) && !empty($conversation['conversation-uri'])) {
-                       $conversation_uri = $conversation['conversation-uri'];
-               } else {
-                       $conversation_uri = $item['parent-uri'];
-               }
-
-               $data['conversation'] = $conversation_uri;
+               $data['conversation'] = $data['context'] = self::createConversationURLFromItem($item);
 
                if (!empty($item['title'])) {
                        $data['name'] = BBCode::convert($item['title'], false, 7);
@@ -753,14 +775,17 @@ class ActivityPub
 
                if (LDSignature::isSigned($activity)) {
                        $ld_signer = LDSignature::getSigner($activity);
-                       if (!empty($ld_signer)) {
+                       if (!empty($ld_signer && ($actor == $http_signer))) {
+                               logger('The HTTP and the JSON-LD signature belong to ' . $ld_signer, LOGGER_DEBUG);
+                               $trust_source = true;
+                       } elseif (!empty($ld_signer)) {
                                logger('JSON-LD signature is signed by ' . $ld_signer, LOGGER_DEBUG);
                                $trust_source = true;
                        } elseif ($actor == $http_signer) {
                                logger('Bad JSON-LD signature, but HTTP signer fits the actor.', LOGGER_DEBUG);
                                $trust_source = true;
                        } else {
-                               logger('Invalid JSON-LD signature.', LOGGER_DEBUG);
+                               logger('Invalid JSON-LD signature and the HTTP signer is different.', LOGGER_DEBUG);
                                $trust_source = false;
                        }
                } elseif ($actor == $http_signer) {
@@ -907,6 +932,7 @@ class ActivityPub
                                break;
 
                        case 'Dislike':
+                               self::dislikeItem($object_data, $body);
                                break;
 
                        case 'Update':
@@ -1054,7 +1080,7 @@ class ActivityPub
                                return false;
                        }
                        logger('Using already stored item for url ' . $object_url, LOGGER_DEBUG);
-                       $data = self::createNote($item);
+                       $data = self::CreateNote($item);
                }
 
                if (empty($data['type'])) {
@@ -1271,6 +1297,17 @@ class ActivityPub
                self::postItem($activity, $item, $body);
        }
 
+       private static function dislikeItem($activity, $body)
+       {
+               $item = [];
+               $item['verb'] = ACTIVITY_DISLIKE;
+               $item['parent-uri'] = $activity['object'];
+               $item['gravity'] = GRAVITY_ACTIVITY;
+               $item['object-type'] = ACTIVITY_OBJ_NOTE;
+
+               self::postItem($activity, $item, $body);
+       }
+
        private static function postItem($activity, $item, $body)
        {
                /// @todo What to do with $activity['context']?