src/Model/Item.php

   1 <?php
   2 /**
   3  * @copyright Copyright (C) 2010-2023, the Friendica project
   4  *
   5  * @license GNU AGPL version 3 or any later version
   6  *
   7  * 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
   9  * published by the Free Software Foundation, either version 3 of the
  10  * License, or (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 <https://www.gnu.org/licenses/>.
  19  *
  20  */
  21
  22 namespace Friendica\Model;
  23
  24 use Friendica\Contact\LocalRelationship\Entity\LocalRelationship;
  25 use Friendica\Content\Text\BBCode;
  26 use Friendica\Content\Text\HTML;
  27 use Friendica\Core\Hook;
  28 use Friendica\Core\Logger;
  29 use Friendica\Core\Protocol;
  30 use Friendica\Core\Renderer;
  31 use Friendica\Core\System;
  32 use Friendica\Core\Worker;
  33 use Friendica\Database\DBA;
  34 use Friendica\DI;
  35 use Friendica\Model\Post\Category;
  36 use Friendica\Network\HTTPException\InternalServerErrorException;
  37 use Friendica\Protocol\Activity;
  38 use Friendica\Protocol\ActivityPub;
  39 use Friendica\Protocol\Delivery;
  40 use Friendica\Protocol\Diaspora;
  41 use Friendica\Util\DateTimeFormat;
  42 use Friendica\Util\Map;
  43 use Friendica\Util\Network;
  44 use Friendica\Util\Proxy;
  45 use Friendica\Util\Strings;
  46 use Friendica\Util\Temporal;
  47 use GuzzleHttp\Psr7\Uri;
  48 use LanguageDetection\Language;
  49
  50 class Item
  51 {
  52         // Posting types, inspired by https://www.w3.org/TR/activitystreams-vocabulary/#object-types
  53         const PT_ARTICLE = 0;
  54         const PT_NOTE = 1;
  55         const PT_PAGE = 2;
  56         const PT_IMAGE = 16;
  57         const PT_AUDIO = 17;
  58         const PT_VIDEO = 18;
  59         const PT_DOCUMENT = 19;
  60         const PT_EVENT = 32;
  61         const PT_POLL = 33;
  62         const PT_PERSONAL_NOTE = 128;
  63
  64         // Posting reasons (Why had a post been stored for a user?)
  65         const PR_NONE = 0;
  66         const PR_TAG = 64;
  67         const PR_TO = 65;
  68         const PR_CC = 66;
  69         const PR_BTO = 67;
  70         const PR_BCC = 68;
  71         const PR_FOLLOWER = 69;
  72         const PR_ANNOUNCEMENT = 70;
  73         const PR_COMMENT = 71;
  74         const PR_STORED = 72;
  75         const PR_GLOBAL = 73;
  76         const PR_RELAY = 74;
  77         const PR_FETCHED = 75;
  78         const PR_COMPLETION = 76;
  79         const PR_DIRECT = 77;
  80         const PR_ACTIVITY = 78;
  81         const PR_DISTRIBUTE = 79;
  82         const PR_PUSHED = 80;
  83         const PR_LOCAL = 81;
  84         const PR_AUDIENCE = 82;
  85
  86         // system.accept_only_sharer setting values
  87         const COMPLETION_NONE    = 1;
  88         const COMPLETION_COMMENT = 0;
  89         const COMPLETION_LIKE    = 2;
  90
  91         // Field list that is used to display the items
  92         const DISPLAY_FIELDLIST = [
  93                 'uid', 'id', 'parent', 'guid', 'network', 'gravity',
  94                 'uri-id', 'uri', 'thr-parent-id', 'thr-parent', 'parent-uri-id', 'parent-uri', 'conversation',
  95                 'commented', 'created', 'edited', 'received', 'verb', 'object-type', 'postopts', 'plink',
  96                 'wall', 'private', 'starred', 'origin', 'parent-origin', 'title', 'body', 'language',
  97                 'content-warning', 'location', 'coord', 'app', 'rendered-hash', 'rendered-html', 'object',
  98                 'quote-uri', 'quote-uri-id', 'allow_cid', 'allow_gid', 'deny_cid', 'deny_gid', 'mention', 'global',
  99                 'author-id', 'author-link', 'author-alias', 'author-name', 'author-avatar', 'author-network', 'author-updated', 'author-gsid', 'author-baseurl', 'author-addr', 'author-uri-id',
 100                 'owner-id', 'owner-link', 'owner-alias', 'owner-name', 'owner-avatar', 'owner-network', 'owner-contact-type', 'owner-updated', 'owner-gsid',
 101                 'causer-id', 'causer-link', 'causer-alias', 'causer-name', 'causer-avatar', 'causer-contact-type', 'causer-network', 'causer-gsid',
 102                 'contact-id', 'contact-uid', 'contact-link', 'contact-name', 'contact-avatar',
 103                 'writable', 'self', 'cid', 'alias',
 104                 'event-created', 'event-edited', 'event-start', 'event-finish',
 105                 'event-summary', 'event-desc', 'event-location', 'event-type',
 106                 'event-nofinish', 'event-ignore', 'event-id',
 107                 'question-id', 'question-multiple', 'question-voters', 'question-end-time',
 108                 'has-categories', 'has-media',
 109                 'delivery_queue_count', 'delivery_queue_done', 'delivery_queue_failed'
 110         ];
 111
 112         // Field list that is used to deliver items via the protocols
 113         const DELIVER_FIELDLIST = [
 114                 'uid', 'id', 'parent', 'uri-id', 'uri', 'thr-parent', 'parent-uri', 'guid',
 115                 'parent-guid', 'conversation', 'received', 'created', 'edited', 'verb', 'object-type', 'object', 'target',
 116                 'private', 'title', 'body', 'raw-body', 'location', 'coord', 'app',
 117                 'inform', 'deleted', 'extid', 'post-type', 'post-reason', 'gravity',
 118                 'allow_cid', 'allow_gid', 'deny_cid', 'deny_gid',
 119                 'author-id', 'author-addr', 'author-link', 'author-name', 'author-avatar', 'owner-id', 'owner-link', 'contact-uid',
 120                 'signed_text', 'network', 'wall', 'contact-id', 'plink', 'origin',
 121                 'thr-parent-id', 'parent-uri-id', 'quote-uri', 'quote-uri-id', 'postopts', 'pubmail',
 122                 'event-created', 'event-edited', 'event-start', 'event-finish',
 123                 'event-summary', 'event-desc', 'event-location', 'event-type',
 124                 'event-nofinish', 'event-ignore', 'event-id'
 125         ];
 126
 127         // All fields in the item table
 128         const ITEM_FIELDLIST = [
 129                 'id', 'uid', 'parent', 'uri', 'parent-uri', 'thr-parent',
 130                 'guid', 'uri-id', 'parent-uri-id', 'thr-parent-id', 'conversation', 'vid',
 131                 'quote-uri', 'quote-uri-id', 'contact-id', 'wall', 'gravity', 'extid', 'psid',
 132                 'created', 'edited', 'commented', 'received', 'changed', 'verb',
 133                 'postopts', 'plink', 'resource-id', 'event-id', 'inform',
 134                 'allow_cid', 'allow_gid', 'deny_cid', 'deny_gid', 'post-type', 'post-reason',
 135                 'private', 'pubmail', 'visible', 'starred',
 136                 'unseen', 'deleted', 'origin', 'mention', 'global', 'network',
 137                 'title', 'content-warning', 'body', 'location', 'coord', 'app',
 138                 'rendered-hash', 'rendered-html', 'object-type', 'object', 'target-type', 'target',
 139                 'author-id', 'author-link', 'author-name', 'author-avatar', 'author-network',
 140                 'owner-id', 'owner-link', 'owner-name', 'owner-avatar', 'causer-id'
 141         ];
 142
 143         // List of all verbs that don't need additional content data.
 144         // Never reorder or remove entries from this list. Just add new ones at the end, if needed.
 145         const ACTIVITIES = [
 146                 Activity::LIKE, Activity::DISLIKE,
 147                 Activity::ATTEND, Activity::ATTENDNO, Activity::ATTENDMAYBE,
 148                 Activity::FOLLOW,
 149                 Activity::ANNOUNCE
 150         ];
 151
 152         // Privacy levels
 153         const PUBLIC = 0;
 154         const PRIVATE = 1;
 155         const UNLISTED = 2;
 156
 157         // Item weight for query ordering
 158         const GRAVITY_PARENT   = 0;
 159         const GRAVITY_ACTIVITY = 3;
 160         const GRAVITY_COMMENT  = 6;
 161         const GRAVITY_UNKNOWN  = 9;
 162
 163         /**
 164          * Update existing item entries
 165          *
 166          * @param array $fields    The fields that are to be changed
 167          * @param array $condition The condition for finding the item entries
 168          *
 169          * In the future we may have to change permissions as well.
 170          * Then we had to add the user id as third parameter.
 171          *
 172          * A return value of "0" doesn't mean an error - but that 0 rows had been changed.
 173          *
 174          * @return integer|boolean number of affected rows - or "false" if there was an error
 175          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 176          */
 177         public static function update(array $fields, array $condition)
 178         {
 179                 if (empty($condition) || empty($fields)) {
 180                         return false;
 181                 }
 182
 183                 if (isset($fields['extid'])) {
 184                         $fields['external-id'] = ItemURI::getIdByURI($fields['extid']);
 185                 }
 186
 187                 if (!empty($fields['verb'])) {
 188                         $fields['vid'] = Verb::getID($fields['verb']);
 189                 }
 190
 191                 if (!empty($fields['edited'])) {
 192                         $previous = Post::selectFirst(['edited'], $condition);
 193                 }
 194
 195                 $rows = Post::update($fields, $condition);
 196                 if (is_bool($rows)) {
 197                         return $rows;
 198                 }
 199
 200                 // We only need to call the line by line update for specific fields
 201                 if (
 202                         empty($fields['body']) && empty($fields['file']) &&
 203                         empty($fields['attach']) && empty($fields['edited'])
 204                 ) {
 205                         return $rows;
 206                 }
 207
 208                 Logger::info('Updating per single row method', ['fields' => $fields, 'condition' => $condition]);
 209
 210                 $items = Post::select(['id', 'origin', 'uri-id', 'uid', 'author-network', 'quote-uri-id'], $condition);
 211
 212                 $notify_items = [];
 213
 214                 while ($item = DBA::fetch($items)) {
 215                         if (!empty($fields['body'])) {
 216                                 if (!empty($item['quote-uri-id'])) {
 217                                         $fields['body'] = BBCode::removeSharedData($fields['body']);
 218
 219                                         if (!empty($fields['raw-body'])) {
 220                                                 $fields['raw-body'] = BBCode::removeSharedData($fields['raw-body']);
 221                                         }
 222                                 }
 223
 224                                 $content_fields = ['raw-body' => trim($fields['raw-body'] ?? $fields['body'])];
 225
 226                                 // Remove all media attachments from the body and store them in the post-media table
 227                                 // @todo On shared postings (Diaspora style and commented reshare) don't fetch content from the shared part
 228                                 $content_fields['raw-body'] = Post\Media::insertFromBody($item['uri-id'], $content_fields['raw-body']);
 229                                 $content_fields['raw-body'] = self::setHashtags($content_fields['raw-body']);
 230
 231                                 Post\Media::insertFromRelevantUrl($item['uri-id'], $content_fields['raw-body'], $fields['body'], $item['author-network']);
 232
 233                                 Post\Media::insertFromAttachmentData($item['uri-id'], $fields['body']);
 234                                 $content_fields['raw-body'] = BBCode::removeAttachment($content_fields['raw-body']);
 235
 236                                 Post\Content::update($item['uri-id'], $content_fields);
 237                         }
 238
 239                         if (!empty($fields['file'])) {
 240                                 Post\Category::storeTextByURIId($item['uri-id'], $item['uid'], $fields['file']);
 241                         }
 242
 243                         if (!empty($fields['attach'])) {
 244                                 Post\Media::insertFromAttachment($item['uri-id'], $fields['attach']);
 245                         }
 246
 247                         // We only need to notify others when it is an original entry from us.
 248                         // Only call the notifier when the item had been edited and records had been changed.
 249                         if ($item['origin'] && !empty($fields['edited']) && ($previous['edited'] != $fields['edited'])) {
 250                                 $notify_items[] = $item['id'];
 251                         }
 252                 }
 253
 254                 DBA::close($items);
 255
 256                 foreach ($notify_items as $notify_item) {
 257                         $post = Post::selectFirst([], ['id' => $notify_item]);
 258
 259                         if ($post['gravity'] != self::GRAVITY_PARENT) {
 260                                 $signed = Diaspora::createCommentSignature($post);
 261                                 if (!empty($signed)) {
 262                                         DBA::replace('diaspora-interaction', ['uri-id' => $post['uri-id'], 'interaction' => json_encode($signed)]);
 263                                 }
 264                         }
 265
 266                         Worker::add(Worker::PRIORITY_HIGH, 'Notifier', Delivery::POST, (int)$post['uri-id'], (int)$post['uid']);
 267                 }
 268
 269                 return $rows;
 270         }
 271
 272         /**
 273          * Delete an item and notify others about it - if it was ours
 274          *
 275          * @param array   $condition The condition for finding the item entries
 276          * @param integer $priority  Priority for the notification
 277          * @return void
 278          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 279          */
 280         public static function markForDeletion(array $condition, int $priority = Worker::PRIORITY_HIGH)
 281         {
 282                 $items = Post::select(['id'], $condition);
 283                 while ($item = Post::fetch($items)) {
 284                         self::markForDeletionById($item['id'], $priority);
 285                 }
 286                 DBA::close($items);
 287         }
 288
 289         /**
 290          * Delete an item for an user and notify others about it - if it was ours
 291          *
 292          * @param array   $condition The condition for finding the item entries
 293          * @param integer $uid       User who wants to delete this item
 294          * @return void
 295          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 296          */
 297         public static function deleteForUser(array $condition, int $uid)
 298         {
 299                 if ($uid == 0) {
 300                         return;
 301                 }
 302
 303                 $items = Post::select(['id', 'uid', 'uri-id'], $condition);
 304                 while ($item = Post::fetch($items)) {
 305                         if (in_array($item['uid'], [$uid, 0])) {
 306                                 Post\User::update($item['uri-id'], $uid, ['hidden' => true], true);
 307                                 Post\ThreadUser::update($item['uri-id'], $uid, ['hidden' => true], true);
 308                         }
 309
 310                         if ($item['uid'] == $uid) {
 311                                 self::markForDeletionById($item['id'], Worker::PRIORITY_HIGH);
 312                         } elseif ($item['uid'] != 0) {
 313                                 Logger::warning('Wrong ownership. Not deleting item', ['id' => $item['id']]);
 314                         }
 315                 }
 316                 DBA::close($items);
 317         }
 318
 319         /**
 320          * Mark an item for deletion, delete related data and notify others about it - if it was ours
 321          *
 322          * @param integer $item_id
 323          * @param integer $priority Priority for the notification
 324          * @return boolean success
 325          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 326          */
 327         public static function markForDeletionById(int $item_id, int $priority = Worker::PRIORITY_HIGH): bool
 328         {
 329                 Logger::info('Mark item for deletion by id', ['id' => $item_id, 'callstack' => System::callstack()]);
 330                 // locate item to be deleted
 331                 $fields = [
 332                         'id', 'uri', 'uri-id', 'uid', 'parent', 'parent-uri-id', 'origin',
 333                         'deleted', 'resource-id', 'event-id',
 334                         'verb', 'object-type', 'object', 'target', 'contact-id', 'psid', 'gravity'
 335                 ];
 336                 $item = Post::selectFirst($fields, ['id' => $item_id]);
 337                 if (!DBA::isResult($item)) {
 338                         Logger::info('Item not found.', ['id' => $item_id]);
 339                         return false;
 340                 }
 341
 342                 if ($item['deleted']) {
 343                         Logger::info('Item has already been marked for deletion.', ['id' => $item_id]);
 344                         return false;
 345                 }
 346
 347                 $parent = Post::selectFirst(['origin'], ['id' => $item['parent']]);
 348                 if (!DBA::isResult($parent)) {
 349                         $parent = ['origin' => false];
 350                 }
 351
 352                 // clean up categories and tags so they don't end up as orphans
 353                 Post\Category::deleteByURIId($item['uri-id'], $item['uid']);
 354
 355                 /*
 356                  * If item is a link to a photo resource, nuke all the associated photos
 357                  * (visitors will not have photo resources)
 358                  * This only applies to photos uploaded from the photos page. Photos inserted into a post do not
 359                  * generate a resource-id and therefore aren't intimately linked to the item.
 360                  */
 361                 /// @TODO: this should first check if photo is used elsewhere
 362                 if ($item['resource-id']) {
 363                         Photo::delete(['resource-id' => $item['resource-id'], 'uid' => $item['uid']]);
 364                 }
 365
 366                 // If item is a link to an event, delete the event.
 367                 if (intval($item['event-id'])) {
 368                         Event::delete($item['event-id']);
 369                 }
 370
 371                 // If item has attachments, drop them
 372                 $attachments = Post\Media::getByURIId($item['uri-id'], [Post\Media::DOCUMENT]);
 373                 foreach ($attachments as $attachment) {
 374                         if (preg_match('|attach/(\d+)|', $attachment['url'], $matches)) {
 375                                 Attach::delete(['id' => $matches[1], 'uid' => $item['uid']]);
 376                         }
 377                 }
 378
 379                 // Set the item to "deleted"
 380                 $item_fields = ['deleted' => true, 'edited' => DateTimeFormat::utcNow(), 'changed' => DateTimeFormat::utcNow()];
 381                 Post::update($item_fields, ['id' => $item['id']]);
 382
 383                 Post\Category::storeTextByURIId($item['uri-id'], $item['uid'], '');
 384
 385                 if (!Post::exists(["`uri-id` = ? AND `uid` != 0 AND NOT `deleted`", $item['uri-id']])) {
 386                         self::markForDeletion(['uri-id' => $item['uri-id'], 'uid' => 0, 'deleted' => false], $priority);
 387                 }
 388
 389                 Post\DeliveryData::delete($item['uri-id']);
 390
 391                 // If it's the parent of a comment thread, kill all the kids
 392                 if ($item['gravity'] == self::GRAVITY_PARENT) {
 393                         self::markForDeletion(['parent' => $item['parent'], 'deleted' => false], $priority);
 394                 }
 395
 396                 // Is it our comment and/or our thread?
 397                 if (($item['origin'] || $parent['origin']) && ($item['uid'] != 0)) {
 398                         // When we delete the original post we will delete all existing copies on the server as well
 399                         self::markForDeletion(['uri-id' => $item['uri-id'], 'deleted' => false], $priority);
 400
 401                         // send the notification upstream/downstream
 402                         if ($priority) {
 403                                 Worker::add(['priority' => $priority, 'dont_fork' => true], 'Notifier', Delivery::DELETION, (int)$item['uri-id'], (int)$item['uid']);
 404                         }
 405                 } elseif ($item['uid'] != 0) {
 406                         Post\User::update($item['uri-id'], $item['uid'], ['hidden' => true]);
 407                         Post\ThreadUser::update($item['uri-id'], $item['uid'], ['hidden' => true]);
 408                 }
 409
 410                 DI::notify()->deleteForItem($item['uri-id']);
 411                 DI::notification()->deleteForItem($item['uri-id']);
 412
 413                 Logger::info('Item has been marked for deletion.', ['id' => $item_id]);
 414
 415                 return true;
 416         }
 417
 418         /**
 419          * Get guid from given item record
 420          *
 421          * @param array $item Item record
 422          * @param bool Whether to notify (?)
 423          * @return string Guid
 424          */
 425         public static function guid(array $item, bool $notify): string
 426         {
 427                 if (!empty($item['guid'])) {
 428                         return trim($item['guid']);
 429                 }
 430
 431                 if ($notify) {
 432                         // We have to avoid duplicates. So we create the GUID in form of a hash of the plink or uri.
 433                         // We add the hash of our own host because our host is the original creator of the post.
 434                         $prefix_host = DI::baseUrl()->getHost();
 435                 } else {
 436                         $prefix_host = '';
 437
 438                         // We are only storing the post so we create a GUID from the original hostname.
 439                         if (!empty($item['author-link'])) {
 440                                 $parsed = parse_url($item['author-link']);
 441                                 if (!empty($parsed['host'])) {
 442                                         $prefix_host = $parsed['host'];
 443                                 }
 444                         }
 445
 446                         if (empty($prefix_host) && !empty($item['plink'])) {
 447                                 $parsed = parse_url($item['plink']);
 448                                 if (!empty($parsed['host'])) {
 449                                         $prefix_host = $parsed['host'];
 450                                 }
 451                         }
 452
 453                         if (empty($prefix_host) && !empty($item['uri'])) {
 454                                 $parsed = parse_url($item['uri']);
 455                                 if (!empty($parsed['host'])) {
 456                                         $prefix_host = $parsed['host'];
 457                                 }
 458                         }
 459
 460                         // Is it in the format data@host.tld? - Used for mail contacts
 461                         if (empty($prefix_host) && !empty($item['author-link']) && strstr($item['author-link'], '@')) {
 462                                 $mailparts = explode('@', $item['author-link']);
 463                                 $prefix_host = array_pop($mailparts);
 464                         }
 465                 }
 466
 467                 if (!empty($item['plink'])) {
 468                         $guid = self::guidFromUri($item['plink'], $prefix_host);
 469                 } elseif (!empty($item['uri'])) {
 470                         $guid = self::guidFromUri($item['uri'], $prefix_host);
 471                 } else {
 472                         $guid = System::createUUID(hash('crc32', $prefix_host));
 473                 }
 474
 475                 return $guid;
 476         }
 477
 478         /**
 479          * Returns contact id from given item record
 480          *
 481          * @param array $item Item record
 482          * @return int Contact id
 483          */
 484         private static function contactId(array $item): int
 485         {
 486                 if ($item['uid'] == 0) {
 487                         return $item['owner-id'];
 488                 }
 489
 490                 if ($item['origin']) {
 491                         $owner = User::getOwnerDataById($item['uid']);
 492                         return $owner['id'];
 493                 }
 494
 495                 $contact_id      = 0;
 496                 $user_contact_id = 0;
 497                 foreach (['group-link', 'causer-link', 'owner-link', 'author-link'] as $field) {
 498                         if (empty($item[$field])) {
 499                                 continue;
 500                         }
 501                         if (!$user_contact_id && Contact::isSharingByURL($item[$field], $item['uid'], true)) {
 502                                 $user_contact_id = Contact::getIdForURL($item[$field], $item['uid']);
 503                         } elseif (!$contact_id) {
 504                                 $contact_id = Contact::getIdForURL($item[$field]);
 505                         }
 506                 }
 507
 508                 if ($user_contact_id) {
 509                         return $user_contact_id;
 510                 }
 511
 512                 if (!empty($item['causer-id']) && Contact::isSharing($item['causer-id'], $item['uid'], true)) {
 513                         $cdata = Contact::getPublicAndUserContactID($item['causer-id'], $item['uid']);
 514                         if (!empty($cdata['user'])) {
 515                                 return $cdata['user'];
 516                         }
 517                 }
 518
 519                 if ($contact_id) {
 520                         return $contact_id;
 521                 }
 522
 523                 Logger::warning('contact-id could not be fetched, using self contact instead.', ['uid' => $item['uid'], 'item' => $item]);
 524                 $self = Contact::selectFirst(['id'], ['self' => true, 'uid' => $item['uid']]);
 525                 return $self['id'];
 526         }
 527
 528         /**
 529          * Write an item array into a spool file to be inserted later.
 530          * This command is called whenever there are issues storing an item.
 531          *
 532          * @param array $item The item fields that are to be inserted
 533          * @throws \Exception
 534          */
 535         private static function spool(array $item)
 536         {
 537                 // Now we store the data in the spool directory
 538                 // We use "microtime" to keep the arrival order and "mt_rand" to avoid duplicates
 539                 $file = 'item-' . round(microtime(true) * 10000) . '-' . mt_rand() . '.msg';
 540
 541                 $spoolpath = System::getSpoolPath();
 542                 if ($spoolpath != '') {
 543                         $spool = $spoolpath . '/' . $file;
 544
 545                         file_put_contents($spool, json_encode($item));
 546                         Logger::warning("Item wasn't stored - Item was spooled into file", ['file' => $file]);
 547                 }
 548         }
 549
 550         /**
 551          * Check if the item array is a duplicate
 552          *
 553          * @param array $item Item record
 554          * @return boolean is it a duplicate?
 555          */
 556         private static function isDuplicate(array $item): bool
 557         {
 558                 // Checking if there is already an item with the same guid
 559                 $condition = ['guid' => $item['guid'], 'network' => $item['network'], 'uid' => $item['uid']];
 560                 if (Post::exists($condition)) {
 561                         Logger::notice('Found already existing item', $condition);
 562                         return true;
 563                 }
 564
 565                 $condition = [
 566                         'uri-id' => $item['uri-id'], 'uid' => $item['uid'],
 567                         'network' => [$item['network'], Protocol::DFRN]
 568                 ];
 569                 if (Post::exists($condition)) {
 570                         Logger::notice('duplicated item with the same uri found.', $condition);
 571                         return true;
 572                 }
 573
 574                 // On Friendica and Diaspora the GUID is unique
 575                 if (in_array($item['network'], [Protocol::DFRN, Protocol::DIASPORA])) {
 576                         $condition = ['guid' => $item['guid'], 'uid' => $item['uid']];
 577                         if (Post::exists($condition)) {
 578                                 Logger::notice('duplicated item with the same guid found.', $condition);
 579                                 return true;
 580                         }
 581                 } elseif ($item['network'] == Protocol::OSTATUS) {
 582                         // Check for an existing post with the same content. There seems to be a problem with OStatus.
 583                         $condition = [
 584                                 "`body` = ? AND `network` = ? AND `created` = ? AND `contact-id` = ? AND `uid` = ?",
 585                                 $item['body'], $item['network'], $item['created'], $item['contact-id'], $item['uid']
 586                         ];
 587                         if (Post::exists($condition)) {
 588                                 Logger::notice('duplicated item with the same body found.', $item);
 589                                 return true;
 590                         }
 591                 }
 592
 593                 /*
 594                  * Check for already added items.
 595                  * There is a timing issue here that sometimes creates double postings.
 596                  * An unique index would help - but the limitations of MySQL (maximum size of index values) prevent this.
 597                  */
 598                 if (($item['uid'] == 0) && Post::exists(['uri-id' => $item['uri-id'], 'uid' => 0])) {
 599                         Logger::notice('Global item already stored.', ['uri-id' => $item['uri-id'], 'network' => $item['network']]);
 600                         return true;
 601                 }
 602
 603                 return false;
 604         }
 605
 606         /**
 607          * Check if the item array is valid
 608          *
 609          * @param array $item Item record
 610          * @return boolean item is valid
 611          */
 612         public static function isValid(array $item): bool
 613         {
 614                 // When there is no content then we don't post it
 615                 if (($item['body'] . $item['title'] == '') && empty($item['quote-uri-id']) && empty($item['attachments']) && (empty($item['uri-id']) || !Post\Media::existsByURIId($item['uri-id']))) {
 616                         Logger::notice('No body, no title.');
 617                         return false;
 618                 }
 619
 620                 if (!empty($item['uid'])) {
 621                         $owner = User::getOwnerDataById($item['uid'], false);
 622                         if (!$owner) {
 623                                 Logger::warning('Missing item user owner data', ['uid' => $item['uid']]);
 624                                 return false;
 625                         }
 626
 627                         if ($owner['account_expired'] || $owner['account_removed']) {
 628                                 Logger::notice('Item user has been deleted/expired/removed', ['uid' => $item['uid'], 'deleted' => $owner['deleted'], 'account_expired' => $owner['account_expired'], 'account_removed' => $owner['account_removed']]);
 629                                 return false;
 630                         }
 631                 }
 632
 633                 if (!empty($item['author-id']) && Contact::isBlocked($item['author-id'])) {
 634                         Logger::notice('Author is blocked node-wide', ['author-link' => $item['author-link'], 'item-uri' => $item['uri']]);
 635                         return false;
 636                 }
 637
 638                 if (!empty($item['author-link']) && Network::isUrlBlocked($item['author-link'])) {
 639                         Logger::notice('Author server is blocked', ['author-link' => $item['author-link'], 'item-uri' => $item['uri']]);
 640                         return false;
 641                 }
 642
 643                 if (!empty($item['owner-id']) && Contact::isBlocked($item['owner-id'])) {
 644                         Logger::notice('Owner is blocked node-wide', ['owner-link' => $item['owner-link'], 'item-uri' => $item['uri']]);
 645                         return false;
 646                 }
 647
 648                 if (!empty($item['owner-link']) && Network::isUrlBlocked($item['owner-link'])) {
 649                         Logger::notice('Owner server is blocked', ['owner-link' => $item['owner-link'], 'item-uri' => $item['uri']]);
 650                         return false;
 651                 }
 652
 653                 if ($item['verb'] == Activity::FOLLOW) {
 654                         if (!$item['origin'] && ($item['author-id'] == Contact::getPublicIdByUserId($item['uid']))) {
 655                                 // Our own follow request can be relayed to us. We don't store it to avoid notification chaos.
 656                                 Logger::info("Follow: Don't store not origin follow request", ['parent-uri' => $item['parent-uri']]);
 657                                 return false;
 658                         }
 659
 660                         $condition = [
 661                                 'verb' => Activity::FOLLOW, 'uid' => $item['uid'],
 662                                 'parent-uri' => $item['parent-uri'], 'author-id' => $item['author-id']
 663                         ];
 664                         if (Post::exists($condition)) {
 665                                 // It happens that we receive multiple follow requests by the same author - we only store one.
 666                                 Logger::info('Follow: Found existing follow request from author', ['author-id' => $item['author-id'], 'parent-uri' => $item['parent-uri']]);
 667                                 return false;
 668                         }
 669                 }
 670
 671                 return true;
 672         }
 673
 674         /**
 675          * Check if the item array is too old
 676          *
 677          * @param array $item Item record
 678          * @return boolean item is too old
 679          */
 680         public static function isTooOld(array $item): bool
 681         {
 682                 // check for create date and expire time
 683                 $expire_interval = DI::config()->get('system', 'dbclean-expire-days', 0);
 684
 685                 $user = DBA::selectFirst('user', ['expire'], ['uid' => $item['uid']]);
 686                 if (DBA::isResult($user) && ($user['expire'] > 0) && (($user['expire'] < $expire_interval) || ($expire_interval == 0))) {
 687                         $expire_interval = $user['expire'];
 688                 }
 689
 690                 if (($expire_interval > 0) && !empty($item['created'])) {
 691                         $expire_date = time() - ($expire_interval * 86400);
 692                         $created_date = strtotime($item['created']);
 693                         if ($created_date < $expire_date) {
 694                                 Logger::notice('Item created before expiration interval.', [
 695                                         'created' => date('c', $created_date),
 696                                         'expired' => date('c', $expire_date),
 697                                         '$item' => $item
 698                                 ]);
 699                                 return true;
 700                         }
 701                 }
 702
 703                 return false;
 704         }
 705
 706         /**
 707          * Return the id of the given item array if it has been stored before
 708          *
 709          * @param array $item Item record
 710          * @return integer Item id or zero on error
 711          */
 712         private static function getDuplicateID(array $item): int
 713         {
 714                 if (empty($item['network']) || in_array($item['network'], Protocol::FEDERATED)) {
 715                         $condition = [
 716                                 '`uri-id` = ? AND `uid` = ? AND `network` IN (?, ?, ?, ?)',
 717                                 $item['uri-id'],
 718                                 $item['uid'],
 719                                 Protocol::ACTIVITYPUB,
 720                                 Protocol::DIASPORA,
 721                                 Protocol::DFRN,
 722                                 Protocol::OSTATUS
 723                         ];
 724                         $existing = Post::selectFirst(['id', 'network'], $condition);
 725                         if (DBA::isResult($existing)) {
 726                                 // We only log the entries with a different user id than 0. Otherwise we would have too many false positives
 727                                 if ($item['uid'] != 0) {
 728                                         Logger::notice('Item already existed for user', [
 729                                                 'uri-id' => $item['uri-id'],
 730                                                 'uid' => $item['uid'],
 731                                                 'network' => $item['network'],
 732                                                 'existing_id' => $existing['id'],
 733                                                 'existing_network' => $existing['network']
 734                                         ]);
 735                                 }
 736
 737                                 return $existing['id'];
 738                         }
 739                 }
 740                 return 0;
 741         }
 742
 743         /**
 744          * Fetch the uri-id of the parent for the given uri-id
 745          *
 746          * @param integer $uriid
 747          * @return integer
 748          */
 749         public static function getParent(int $uriid): int
 750         {
 751                 $thread_parent = Post::selectFirstPost(['thr-parent-id', 'gravity'], ['uri-id' => $uriid]);
 752                 if (empty($thread_parent)) {
 753                         return 0;
 754                 }
 755
 756                 if ($thread_parent['gravity'] == Item::GRAVITY_PARENT) {
 757                         return $uriid;
 758                 }
 759
 760                 return self::getParent($thread_parent['thr-parent-id']);
 761         }
 762
 763         /**
 764          * Fetch top-level parent data for the given item array
 765          *
 766          * @param array $item
 767          * @return array item array with parent data
 768          * @throws \Exception
 769          */
 770         private static function getTopLevelParent(array $item): array
 771         {
 772                 $fields = [
 773                         'uid', 'uri', 'parent-uri', 'id', 'deleted',
 774                         'uri-id', 'parent-uri-id',
 775                         'allow_cid', 'allow_gid', 'deny_cid', 'deny_gid',
 776                         'wall', 'private', 'origin', 'author-id'
 777                 ];
 778                 $condition = ['uri-id' => [$item['thr-parent-id'], $item['parent-uri-id']], 'uid' => $item['uid']];
 779                 $params = ['order' => ['id' => false]];
 780                 $parent = Post::selectFirst($fields, $condition, $params);
 781
 782                 if (!DBA::isResult($parent) && Post::exists(['uri-id' => [$item['thr-parent-id'], $item['parent-uri-id']], 'uid' => 0])) {
 783                         $stored = Item::storeForUserByUriId($item['thr-parent-id'], $item['uid'], ['post-reason' => Item::PR_COMPLETION]);
 784                         if (!$stored && ($item['thr-parent-id'] != $item['parent-uri-id'])) {
 785                                 $stored = Item::storeForUserByUriId($item['parent-uri-id'], $item['uid'], ['post-reason' => Item::PR_COMPLETION]);
 786                         }
 787                         if ($stored) {
 788                                 Logger::info('Stored thread parent item for user', ['uri-id' => $item['thr-parent-id'], 'uid' => $item['uid'], 'stored' => $stored]);
 789                                 $parent = Post::selectFirst($fields, $condition, $params);
 790                         }
 791                 }
 792
 793                 if (!DBA::isResult($parent)) {
 794                         Logger::notice('item parent was not found - ignoring item', ['uri-id' => $item['uri-id'], 'thr-parent-id' => $item['thr-parent-id'], 'uid' => $item['uid'], 'callstack' => System::callstack(20)]);
 795                         return [];
 796                 }
 797
 798                 if ($parent['uri-id'] == $parent['parent-uri-id']) {
 799                         return $parent;
 800                 }
 801
 802                 $condition = [
 803                         'uri-id' => $parent['parent-uri-id'],
 804                         'parent-uri-id' => $parent['parent-uri-id'],
 805                         'uid' => $parent['uid']
 806                 ];
 807                 $params = ['order' => ['id' => false]];
 808                 $toplevel_parent = Post::selectFirst($fields, $condition, $params);
 809
 810                 if (!DBA::isResult($toplevel_parent) && $item['origin']) {
 811                         $stored = Item::storeForUserByUriId($item['parent-uri-id'], $item['uid'], ['post-reason' => Item::PR_COMPLETION]);
 812                         Logger::info('Stored parent item for user', ['uri-id' => $item['parent-uri-id'], 'uid' => $item['uid'], 'stored' => $stored]);
 813                         $toplevel_parent = Post::selectFirst($fields, $condition, $params);
 814                 }
 815
 816                 if (!DBA::isResult($toplevel_parent)) {
 817                         Logger::notice('item top level parent was not found - ignoring item', ['parent-uri-id' => $parent['parent-uri-id'], 'uid' => $parent['uid']]);
 818                         return [];
 819                 }
 820
 821                 return $toplevel_parent;
 822         }
 823
 824         /**
 825          * Get the gravity for the given item array
 826          *
 827          * @param array $item
 828          * @return integer gravity
 829          */
 830         private static function getGravity(array $item): int
 831         {
 832                 $activity = DI::activity();
 833
 834                 if (isset($item['gravity'])) {
 835                         return intval($item['gravity']);
 836                 } elseif ($item['parent-uri-id'] === $item['uri-id']) {
 837                         return self::GRAVITY_PARENT;
 838                 } elseif ($activity->match($item['verb'], Activity::POST)) {
 839                         return self::GRAVITY_COMMENT;
 840                 } elseif ($activity->match($item['verb'], Activity::FOLLOW)) {
 841                         return self::GRAVITY_ACTIVITY;
 842                 } elseif ($activity->match($item['verb'], Activity::ANNOUNCE)) {
 843                         return self::GRAVITY_ACTIVITY;
 844                 }
 845
 846                 Logger::info('Unknown gravity for verb', ['verb' => $item['verb']]);
 847                 return self::GRAVITY_UNKNOWN;   // Should not happen
 848         }
 849
 850         private static function prepareOriginPost(array $item): array
 851         {
 852                 $item = DI::contentItem()->initializePost($item);
 853                 $item = DI::contentItem()->finalizePost($item);
 854
 855                 return $item;
 856         }
 857
 858         /**
 859          * Inserts item record
 860          *
 861          * @param array $item Item array to be inserted
 862          * @param int   $notify Notification (type?)
 863          * @param bool  $post_local (???)
 864          * @return int Zero means error, otherwise primary key (id) is being returned
 865          */
 866         public static function insert(array $item, int $notify = 0, bool $post_local = true): int
 867         {
 868                 $orig_item = $item;
 869
 870                 $priority = Worker::PRIORITY_HIGH;
 871
 872                 // If it is a posting where users should get notifications, then define it as wall posting
 873                 if ($notify) {
 874                         $item = self::prepareOriginPost($item);
 875
 876                         if (is_int($notify) && in_array($notify, Worker::PRIORITIES)) {
 877                                 $priority = $notify;
 878                         }
 879                 } else {
 880                         $item['network'] = trim(($item['network'] ?? '') ?: Protocol::PHANTOM);
 881                 }
 882
 883                 $uid = intval($item['uid']);
 884
 885                 $item['guid'] = self::guid($item, $notify);
 886                 $item['uri'] = substr(trim($item['uri'] ?? '') ?: self::newURI($item['guid']), 0, 255);
 887
 888                 // Store URI data
 889                 $item['uri-id'] = ItemURI::insert(['uri' => $item['uri'], 'guid' => $item['guid']]);
 890
 891                 // Backward compatibility: parent-uri used to be the direct parent uri.
 892                 // If it is provided without a thr-parent, it probably is the old behavior.
 893                 if (empty($item['thr-parent']) || empty($item['parent-uri'])) {
 894                         $item['thr-parent'] = trim($item['thr-parent'] ?? $item['parent-uri'] ?? $item['uri']);
 895                         $item['parent-uri'] = $item['thr-parent'];
 896                 }
 897
 898                 $item['thr-parent-id'] = ItemURI::getIdByURI($item['thr-parent']);
 899                 $item['parent-uri-id'] = ItemURI::getIdByURI($item['parent-uri']);
 900
 901                 // Store conversation data
 902                 $source = $item['source'] ?? '';
 903                 unset($item['conversation-uri']);
 904                 unset($item['conversation-href']);
 905                 unset($item['source']);
 906
 907                 /*
 908                  * Do we already have this item?
 909                  * We have to check several networks since Friendica posts could be repeated
 910                  * via OStatus (maybe Diaspora as well)
 911                  */
 912                 $duplicate = self::getDuplicateID($item);
 913                 if ($duplicate) {
 914                         return $duplicate;
 915                 }
 916
 917                 // Additional duplicate checks
 918                 /// @todo Check why the first duplication check returns the item number and the second a 0
 919                 if (self::isDuplicate($item)) {
 920                         return 0;
 921                 }
 922
 923                 if (!isset($item['post-type'])) {
 924                         $item['post-type'] = empty($item['title']) ? self::PT_NOTE : self::PT_ARTICLE;
 925                 }
 926
 927                 $defined_permissions = isset($item['allow_cid']) && isset($item['allow_gid']) && isset($item['deny_cid']) && isset($item['deny_gid']) && isset($item['private']);
 928
 929                 $item['wall']          = intval($item['wall'] ?? 0);
 930                 $item['extid']         = trim($item['extid'] ?? '');
 931                 $item['author-name']   = trim($item['author-name'] ?? '');
 932                 $item['author-link']   = trim($item['author-link'] ?? '');
 933                 $item['author-avatar'] = trim($item['author-avatar'] ?? '');
 934                 $item['owner-name']    = trim($item['owner-name'] ?? '');
 935                 $item['owner-link']    = trim($item['owner-link'] ?? '');
 936                 $item['owner-avatar']  = trim($item['owner-avatar'] ?? '');
 937                 $item['received']      = (isset($item['received'])  ? DateTimeFormat::utc($item['received'])  : DateTimeFormat::utcNow());
 938                 $item['created']       = (isset($item['created'])   ? DateTimeFormat::utc($item['created'])   : $item['received']);
 939                 $item['edited']        = (isset($item['edited'])    ? DateTimeFormat::utc($item['edited'])    : $item['created']);
 940                 $item['changed']       = (isset($item['changed'])   ? DateTimeFormat::utc($item['changed'])   : $item['created']);
 941                 $item['commented']     = (isset($item['commented']) ? DateTimeFormat::utc($item['commented']) : $item['created']);
 942                 $item['title']         = substr(trim($item['title'] ?? ''), 0, 255);
 943                 $item['location']      = trim($item['location'] ?? '');
 944                 $item['coord']         = trim($item['coord'] ?? '');
 945                 $item['visible']       = (isset($item['visible']) ? intval($item['visible']) : 1);
 946                 $item['deleted']       = 0;
 947                 $item['verb']          = trim($item['verb'] ?? '');
 948                 $item['object-type']   = trim($item['object-type'] ?? '');
 949                 $item['object']        = trim($item['object'] ?? '');
 950                 $item['target-type']   = trim($item['target-type'] ?? '');
 951                 $item['target']        = trim($item['target'] ?? '');
 952                 $item['plink']         = substr(trim($item['plink'] ?? ''), 0, 255);
 953                 $item['allow_cid']     = trim($item['allow_cid'] ?? '');
 954                 $item['allow_gid']     = trim($item['allow_gid'] ?? '');
 955                 $item['deny_cid']      = trim($item['deny_cid'] ?? '');
 956                 $item['deny_gid']      = trim($item['deny_gid'] ?? '');
 957                 $item['private']       = intval($item['private'] ?? self::PUBLIC);
 958                 $item['body']          = trim($item['body'] ?? '');
 959                 $item['raw-body']      = trim($item['raw-body'] ?? $item['body']);
 960                 $item['app']           = trim($item['app'] ?? '');
 961                 $item['origin']        = intval($item['origin'] ?? 0);
 962                 $item['postopts']      = trim($item['postopts'] ?? '');
 963                 $item['resource-id']   = trim($item['resource-id'] ?? '');
 964                 $item['event-id']      = intval($item['event-id'] ?? 0);
 965                 $item['inform']        = trim($item['inform'] ?? '');
 966                 $item['file']          = trim($item['file'] ?? '');
 967
 968                 // Communities aren't working with the Diaspora protocol
 969                 if (($uid != 0) && ($item['network'] == Protocol::DIASPORA)) {
 970                         $user = User::getById($uid, ['account-type']);
 971                         if ($user['account-type'] == Contact::TYPE_COMMUNITY) {
 972                                 Logger::info('Community posts are not supported via Diaspora');
 973                                 return 0;
 974                         }
 975                 }
 976
 977                 // Items cannot be stored before they happen ...
 978                 if ($item['created'] > DateTimeFormat::utcNow()) {
 979                         $item['created'] = DateTimeFormat::utcNow();
 980                 }
 981
 982                 // We haven't invented time travel by now.
 983                 if ($item['edited'] > DateTimeFormat::utcNow()) {
 984                         $item['edited'] = DateTimeFormat::utcNow();
 985                 }
 986
 987                 $item['plink'] = ($item['plink'] ?? '') ?: DI::baseUrl() . '/display/' . urlencode($item['guid']);
 988
 989                 $item['gravity'] = self::getGravity($item);
 990
 991                 $default = [
 992                         'url' => $item['author-link'], 'name' => $item['author-name'],
 993                         'photo' => $item['author-avatar'], 'network' => $item['network']
 994                 ];
 995                 $item['author-id'] = ($item['author-id'] ?? 0) ?: Contact::getIdForURL($item['author-link'], 0, null, $default);
 996
 997                 $default = [
 998                         'url' => $item['owner-link'], 'name' => $item['owner-name'],
 999                         'photo' => $item['owner-avatar'], 'network' => $item['network']
1000                 ];
1001                 $item['owner-id'] = ($item['owner-id'] ?? 0) ?: Contact::getIdForURL($item['owner-link'], 0, null, $default);
1002
1003                 $item['post-reason'] = self::getPostReason($item);
1004
1005                 // Ensure that there is an avatar cache
1006                 Contact::checkAvatarCache($item['author-id']);
1007                 Contact::checkAvatarCache($item['owner-id']);
1008
1009                 $item['contact-id'] = self::contactId($item);
1010
1011                 if (
1012                         !empty($item['direction']) && in_array($item['direction'], [Conversation::PUSH, Conversation::RELAY]) &&
1013                         empty($item['origin']) && self::isTooOld($item)
1014                 ) {
1015                         Logger::info('Item is too old', ['item' => $item]);
1016                         return 0;
1017                 }
1018
1019                 if (!self::isValid($item)) {
1020                         return 0;
1021                 }
1022
1023                 if ($item['gravity'] !== self::GRAVITY_PARENT) {
1024                         $toplevel_parent = self::getTopLevelParent($item);
1025                         if (empty($toplevel_parent)) {
1026                                 return 0;
1027                         }
1028
1029                         $parent_id             = $toplevel_parent['id'];
1030                         $item['parent-uri']    = $toplevel_parent['uri'];
1031                         $item['parent-uri-id'] = $toplevel_parent['uri-id'];
1032                         $item['deleted']       = $toplevel_parent['deleted'];
1033                         $item['wall']          = $toplevel_parent['wall'];
1034
1035                         // Reshares have to keep their permissions to allow groups to work
1036                         if (!$defined_permissions && (!$item['origin'] || ($item['verb'] != Activity::ANNOUNCE))) {
1037                                 $item['allow_cid']     = $toplevel_parent['allow_cid'];
1038                                 $item['allow_gid']     = $toplevel_parent['allow_gid'];
1039                                 $item['deny_cid']      = $toplevel_parent['deny_cid'];
1040                                 $item['deny_gid']      = $toplevel_parent['deny_gid'];
1041                         }
1042
1043                         $parent_origin         = $toplevel_parent['origin'];
1044
1045                         // Don't federate received participation messages
1046                         if ($item['verb'] != Activity::FOLLOW) {
1047                                 $item['wall'] = $toplevel_parent['wall'];
1048                         } else {
1049                                 $item['wall'] = false;
1050                                 // Participations are technical messages, so they are set to "seen" automatically
1051                                 $item['unseen'] = false;
1052                         }
1053
1054                         /*
1055                          * If the parent is private, force privacy for the entire conversation
1056                          * This differs from the above settings as it subtly allows comments from
1057                          * email correspondents to be private even if the overall thread is not.
1058                          */
1059                         if (!$defined_permissions && $toplevel_parent['private']) {
1060                                 $item['private'] = $toplevel_parent['private'];
1061                         }
1062
1063                         // If its a post that originated here then tag the thread as "mention"
1064                         if ($item['origin'] && $item['uid']) {
1065                                 DBA::update('post-thread-user', ['mention' => true], ['uri-id' => $item['parent-uri-id'], 'uid' => $item['uid']]);
1066                                 Logger::info('tagged thread as mention', ['parent' => $parent_id, 'parent-uri-id' => $item['parent-uri-id'], 'uid' => $item['uid']]);
1067                         }
1068
1069                         // Update the contact relations
1070                         Contact\Relation::store($toplevel_parent['author-id'], $item['author-id'], $item['created']);
1071                 } else {
1072                         $parent_id = 0;
1073                         $parent_origin = $item['origin'];
1074
1075                         if ($item['wall'] && empty($item['conversation'])) {
1076                                 $item['conversation'] = $item['parent-uri'] . '#context';
1077                         }
1078                 }
1079
1080                 if ($item['origin']) {
1081                         if (Photo::setPermissionFromBody($item['body'], $item['uid'], $item['contact-id'], $item['allow_cid'], $item['allow_gid'], $item['deny_cid'], $item['deny_gid'])) {
1082                                 $item['object-type'] = Activity\ObjectType::IMAGE;
1083                         }
1084
1085                         $item = DI::contentItem()->moveAttachmentsFromBodyToAttach($item);
1086                 }
1087
1088                 $item['parent-uri-id'] = ItemURI::getIdByURI($item['parent-uri']);
1089                 $item['thr-parent-id'] = ItemURI::getIdByURI($item['thr-parent']);
1090
1091                 if (!empty($item['conversation']) && empty($item['conversation-id'])) {
1092                         $item['conversation-id'] = ItemURI::getIdByURI($item['conversation']);
1093                 }
1094
1095                 // Is this item available in the global items (with uid=0)?
1096                 if ($item['uid'] == 0) {
1097                         $item['global'] = true;
1098
1099                         // Set the global flag on all items if this was a global item entry
1100                         Post::update(['global' => true], ['uri-id' => $item['uri-id']]);
1101                 } else {
1102                         $item['global'] = Post::exists(['uid' => 0, 'uri-id' => $item['uri-id']]);
1103                 }
1104
1105                 // ACL settings
1106                 if (!$defined_permissions && !empty($item['allow_cid'] . $item['allow_gid'] . $item['deny_cid'] . $item['deny_gid'])) {
1107                         $item['private'] = self::PRIVATE;
1108                 }
1109
1110                 if ($notify && $post_local) {
1111                         $item['edit'] = false;
1112                         $item['parent'] = $parent_id;
1113
1114                         // Trigger automatic reactions for addons
1115                         if (!isset($item['api_source'])) {
1116                                 $item['api_source'] = true;
1117                         }
1118
1119                         // We have to tell the hooks who we are - this really should be improved
1120                         if (!DI::userSession()->getLocalUserId()) {
1121                                 $_SESSION['authenticated'] = true;
1122                                 $_SESSION['uid'] = $uid;
1123                                 $dummy_session = true;
1124                         } else {
1125                                 $dummy_session = false;
1126                         }
1127
1128                         Hook::callAll('post_local', $item);
1129
1130                         if ($dummy_session) {
1131                                 unset($_SESSION['authenticated']);
1132                                 unset($_SESSION['uid']);
1133                         }
1134                 } elseif (!$notify) {
1135                         Hook::callAll('post_remote', $item);
1136                 }
1137
1138                 if (!empty($item['cancel'])) {
1139                         Logger::notice('post cancelled by addon.');
1140                         return 0;
1141                 }
1142
1143                 if (empty($item['vid']) && !empty($item['verb'])) {
1144                         $item['vid'] = Verb::getID($item['verb']);
1145                 }
1146
1147                 // Creates or assigns the permission set
1148                 $item['psid'] = DI::permissionSet()->selectOrCreate(
1149                         DI::permissionSetFactory()->createFromString(
1150                                 $item['uid'],
1151                                 $item['allow_cid'],
1152                                 $item['allow_gid'],
1153                                 $item['deny_cid'],
1154                                 $item['deny_gid']
1155                         )
1156                 )->id;
1157
1158                 if (!empty($item['extid'])) {
1159                         $item['external-id'] = ItemURI::getIdByURI($item['extid']);
1160                 }
1161
1162                 if ($item['verb'] == Activity::ANNOUNCE) {
1163                         self::setOwnerforResharedItem($item);
1164                 }
1165
1166                 if (isset($item['attachments'])) {
1167                         foreach ($item['attachments'] as $attachment) {
1168                                 $attachment['uri-id'] = $item['uri-id'];
1169                                 Post\Media::insert($attachment);
1170                         }
1171                         unset($item['attachments']);
1172                 }
1173
1174                 if (empty($item['quote-uri-id'])) {
1175                         $quote_id = self::getQuoteUriId($item['body']);
1176                         if (!empty($quote_id)) {
1177                                 // This is one of these "should not happen" situations.
1178                                 // The protocol implementations should already have done this job.
1179                                 Logger::notice('Quote-uri-id detected in post', ['id' => $quote_id, 'guid' => $item['guid'], 'uri-id' => $item['uri-id'], 'callstack' => System::callstack(20)]);
1180                                 $item['quote-uri-id'] = $quote_id;
1181                         }
1182                 }
1183
1184                 if (!empty($item['quote-uri-id'])) {
1185                         $item['raw-body'] = BBCode::removeSharedData($item['raw-body']);
1186                         $item['body']     = BBCode::removeSharedData($item['body']);
1187                 }
1188
1189                 // Remove all media attachments from the body and store them in the post-media table
1190                 $item['raw-body'] = Post\Media::insertFromBody($item['uri-id'], $item['raw-body']);
1191                 $item['raw-body'] = self::setHashtags($item['raw-body']);
1192
1193                 $author = Contact::getById($item['author-id'], ['network']);
1194                 Post\Media::insertFromRelevantUrl($item['uri-id'], $item['raw-body'], $item['body'], $author['network'] ?? '');
1195
1196                 Post\Media::insertFromAttachmentData($item['uri-id'], $item['body']);
1197                 $item['body']     = BBCode::removeAttachment($item['body']);
1198                 $item['raw-body'] = BBCode::removeAttachment($item['raw-body']);
1199
1200                 // Check for hashtags in the body and repair or add hashtag links
1201                 $item['body'] = self::setHashtags($item['body']);
1202
1203                 $item['language'] = self::getLanguage($item);
1204
1205                 $notify_type = Delivery::POST;
1206
1207                 // Filling item related side tables
1208                 if (!empty($item['attach'])) {
1209                         Post\Media::insertFromAttachment($item['uri-id'], $item['attach']);
1210                 }
1211
1212                 if (empty($item['event-id'])) {
1213                         unset($item['event-id']);
1214
1215                         $ev = Event::fromBBCode($item['body']);
1216                         if ((!empty($ev['desc']) || !empty($ev['summary'])) && !empty($ev['start'])) {
1217                                 Logger::info('Event found.');
1218                                 $ev['cid']       = $item['contact-id'];
1219                                 $ev['uid']       = $item['uid'];
1220                                 $ev['uri']       = $item['uri'];
1221                                 $ev['edited']    = $item['edited'];
1222                                 $ev['private']   = $item['private'];
1223                                 $ev['guid']      = $item['guid'];
1224                                 $ev['plink']     = $item['plink'];
1225                                 $ev['network']   = $item['network'];
1226                                 $ev['protocol']  = $item['protocol'] ?? Conversation::PARCEL_UNKNOWN;
1227                                 $ev['direction'] = $item['direction'] ?? Conversation::UNKNOWN;
1228                                 $ev['source']    = $item['source'] ?? '';
1229
1230                                 $event = DBA::selectFirst('event', ['id'], ['uri' => $item['uri'], 'uid' => $item['uid']]);
1231                                 if (DBA::isResult($event)) {
1232                                         $ev['id'] = $event['id'];
1233                                 }
1234
1235                                 $event_id = Event::store($ev);
1236                                 $item = Event::getItemArrayForImportedId($event_id, $item);
1237
1238                                 Logger::info('Event was stored', ['id' => $event_id]);
1239                         }
1240                 }
1241
1242                 if (empty($item['causer-id'])) {
1243                         unset($item['causer-id']);
1244                 }
1245
1246                 if (in_array($item['network'], [Protocol::ACTIVITYPUB, Protocol::DFRN])) {
1247                         $content_warning = BBCode::getAbstract($item['body'], Protocol::ACTIVITYPUB);
1248                         if (!empty($content_warning) && empty($item['content-warning'])) {
1249                                 $item['content-warning'] = BBCode::toPlaintext($content_warning);
1250                         }
1251                 }
1252
1253                 Post::insert($item['uri-id'], $item);
1254
1255                 if ($item['gravity'] == self::GRAVITY_PARENT) {
1256                         Post\Thread::insert($item['uri-id'], $item);
1257                 }
1258
1259                 // The content of activities normally doesn't matter - except for likes from Misskey
1260                 if (!in_array($item['verb'], self::ACTIVITIES) || in_array($item['verb'], [Activity::LIKE, Activity::DISLIKE]) && !empty($item['body']) && (mb_strlen($item['body']) == 1)) {
1261                         Post\Content::insert($item['uri-id'], $item);
1262                 }
1263
1264                 $item['parent'] = $parent_id;
1265
1266                 // Create Diaspora signature
1267                 if ($item['origin'] && empty($item['diaspora_signed_text']) && ($item['gravity'] != self::GRAVITY_PARENT)) {
1268                         $signed = Diaspora::createCommentSignature($item);
1269                         if (!empty($signed)) {
1270                                 $item['diaspora_signed_text'] = json_encode($signed);
1271                         }
1272                 }
1273
1274                 if (!empty($item['diaspora_signed_text'])) {
1275                         DBA::replace('diaspora-interaction', ['uri-id' => $item['uri-id'], 'interaction' => $item['diaspora_signed_text']]);
1276                 }
1277
1278                 // Attached file links
1279                 if (!empty($item['file'])) {
1280                         Post\Category::storeTextByURIId($item['uri-id'], $item['uid'], $item['file']);
1281                 }
1282
1283                 // Delivery relevant data
1284                 $delivery_data = Post\DeliveryData::extractFields($item);
1285
1286                 if (!empty($item['origin']) || !empty($item['wall']) || !empty($delivery_data['postopts']) || !empty($delivery_data['inform'])) {
1287                         Post\DeliveryData::insert($item['uri-id'], $delivery_data);
1288                 }
1289
1290                 // Store tags from the body if this hadn't been handled previously in the protocol classes
1291                 if (!Tag::existsForPost($item['uri-id'])) {
1292                         Tag::storeFromBody($item['uri-id'], $item['body']);
1293                 }
1294
1295                 $condition = ['uri-id' => $item['uri-id'], 'uid' => $item['uid']];
1296                 if (Post::exists($condition)) {
1297                         Logger::notice('Item is already inserted - aborting', $condition);
1298                         return 0;
1299                 }
1300
1301                 $post_user_id = Post\User::insert($item['uri-id'], $item['uid'], $item);
1302                 if (!$post_user_id) {
1303                         Logger::notice('Post-User is already inserted - aborting', ['uid' => $item['uid'], 'uri-id' => $item['uri-id']]);
1304                         return 0;
1305                 }
1306
1307                 if ($item['gravity'] == self::GRAVITY_PARENT) {
1308                         $item['post-user-id'] = $post_user_id;
1309                         Post\ThreadUser::insert($item['uri-id'], $item['uid'], $item);
1310                 }
1311
1312                 Logger::notice('created item', ['post-id' => $post_user_id, 'uid' => $item['uid'], 'network' => $item['network'], 'uri-id' => $item['uri-id'], 'guid' => $item['guid']]);
1313
1314                 $posted_item = Post::selectFirst(self::ITEM_FIELDLIST, ['post-user-id' => $post_user_id]);
1315                 if (!DBA::isResult($posted_item)) {
1316                         // On failure store the data into a spool file so that the "SpoolPost" worker can try again later.
1317                         Logger::warning('Could not store item. it will be spooled', ['id' => $post_user_id]);
1318                         self::spool($orig_item);
1319                         return 0;
1320                 }
1321
1322                 // update the commented timestamp on the parent
1323                 if (DI::config()->get('system', 'like_no_comment')) {
1324                         // Update when it is a comment
1325                         $update_commented = in_array($posted_item['gravity'], [self::GRAVITY_PARENT, self::GRAVITY_COMMENT]);
1326                 } else {
1327                         // Update when it isn't a follow or tag verb
1328                         $update_commented = !in_array($posted_item['verb'], [Activity::FOLLOW, Activity::TAG]);
1329                 }
1330
1331                 if ($update_commented) {
1332                         $fields = ['commented' => DateTimeFormat::utcNow(), 'changed' => DateTimeFormat::utcNow()];
1333                 } else {
1334                         $fields = ['changed' => DateTimeFormat::utcNow()];
1335                 }
1336
1337                 Post::update($fields, ['uri-id' => $posted_item['parent-uri-id'], 'uid' => $posted_item['uid']]);
1338
1339                 // In that function we check if this is a group post. Additionally we delete the item under certain circumstances
1340                 if (self::tagDeliver($posted_item['uid'], $post_user_id)) {
1341                         // Get the user information for the logging
1342                         $user = User::getById($uid);
1343
1344                         Logger::notice('Item had been deleted', ['id' => $post_user_id, 'user' => $uid, 'account-type' => $user['account-type']]);
1345                         return 0;
1346                 }
1347
1348                 if ($notify) {
1349                         DI::contentItem()->postProcessPost($posted_item);
1350                 } else {
1351                         Hook::callAll('post_remote_end', $posted_item);
1352                 }
1353
1354                 if ($posted_item['gravity'] === self::GRAVITY_PARENT) {
1355                         self::addShadow($post_user_id);
1356                 } else {
1357                         self::addShadowPost($post_user_id);
1358                 }
1359
1360                 self::updateContact($posted_item);
1361
1362                 Post\UserNotification::setNotification($posted_item['uri-id'], $posted_item['uid']);
1363
1364                 // Distribute items to users who subscribed to their tags
1365                 self::distributeByTags($posted_item);
1366
1367                 // Automatically reshare the item if the "remote_self" option is selected
1368                 self::autoReshare($posted_item);
1369
1370                 $transmit = $notify || ($posted_item['visible'] && ($parent_origin || $posted_item['origin']));
1371
1372                 if ($transmit) {
1373                         if ($posted_item['uid'] && Contact\User::isBlocked($posted_item['author-id'], $posted_item['uid'])) {
1374                                 Logger::info('Message from blocked author will not be relayed', ['item' => $posted_item['id'], 'uri' => $posted_item['uri'], 'cid' => $posted_item['author-id']]);
1375                                 $transmit = false;
1376                         }
1377                         if ($transmit && $posted_item['uid'] && Contact\User::isBlocked($posted_item['owner-id'], $posted_item['uid'])) {
1378                                 Logger::info('Message from blocked owner will not be relayed', ['item' => $posted_item['id'], 'uri' => $posted_item['uri'], 'cid' => $posted_item['owner-id']]);
1379                                 $transmit = false;
1380                         }
1381                         if ($transmit && !empty($posted_item['causer-id']) && $posted_item['uid'] && Contact\User::isBlocked($posted_item['causer-id'], $posted_item['uid'])) {
1382                                 Logger::info('Message from blocked causer will not be relayed', ['item' => $posted_item['id'], 'uri' => $posted_item['uri'], 'cid' => $posted_item['causer-id']]);
1383                                 $transmit = false;
1384                         }
1385
1386                         // Don't relay participation messages
1387                         if (($posted_item['verb'] == Activity::FOLLOW) &&
1388                                 (!$posted_item['origin'] || ($posted_item['author-id'] != Contact::getPublicIdByUserId($uid)))
1389                         ) {
1390                                 Logger::info('Participation messages will not be relayed', ['item' => $posted_item['id'], 'uri' => $posted_item['uri'], 'verb' => $posted_item['verb']]);
1391                                 $transmit = false;
1392                         }
1393                 }
1394
1395                 if (!empty($source) && ($transmit || DI::config()->get('debug', 'store_source'))) {
1396                         Post\Activity::insert($item['uri-id'], $source);
1397                 }
1398
1399                 if ($transmit) {
1400                         Worker::add(['priority' => $priority, 'dont_fork' => true], 'Notifier', $notify_type, (int)$posted_item['uri-id'], (int)$posted_item['uid']);
1401                 }
1402
1403                 // Fill the cache with the rendered content.
1404                 if (in_array($posted_item['gravity'], [self::GRAVITY_PARENT, self::GRAVITY_COMMENT]) && ($posted_item['uid'] == 0)) {
1405                         self::updateDisplayCache($posted_item['uri-id']);
1406                 }
1407
1408                 Post\Engagement::storeFromItem($posted_item);
1409
1410                 return $post_user_id;
1411         }
1412
1413         /**
1414          * Fetch the post reason for a given item array
1415          *
1416          * @param array $item
1417          *
1418          * @return integer
1419          */
1420         public static function getPostReason(array $item): int
1421         {
1422                 $actor = ($item['gravity'] == self::GRAVITY_PARENT) ? $item['owner-id'] : $item['author-id'];
1423                 if (empty($item['origin']) && ($item['uid'] != 0) && Contact::isSharing($actor, $item['uid'])) {
1424                         return self::PR_FOLLOWER;
1425                 }
1426
1427                 if (!empty($item['origin']) && empty($item['post-reason'])) {
1428                         return self::PR_LOCAL;
1429                 }
1430
1431                 return $item['post-reason'] ?? self::PR_NONE;
1432         }
1433
1434         /**
1435          * Update the display cache
1436          *
1437          * @param integer $uri_id
1438          * @return void
1439          * @throws InternalServerErrorException
1440          * @throws \ImagickException
1441          */
1442         public static function updateDisplayCache(int $uri_id)
1443         {
1444                 $item = Post::selectFirst(self::DISPLAY_FIELDLIST, ['uri-id' => $uri_id]);
1445                 if (!$item) {
1446                         return;
1447                 }
1448
1449                 self::prepareBody($item, false, false, true);
1450         }
1451
1452         /**
1453          * Change the owner of a parent item if it had been shared by a group
1454          *
1455          * (public) group posts in the new format consist of the regular post by the author
1456          * followed by an announce message sent from the group account.
1457          * Changing the owner helps in grouping group posts.
1458          *
1459          * @param array $item
1460          * @return void
1461          */
1462         private static function setOwnerforResharedItem(array $item)
1463         {
1464                 $parent = Post::selectFirst(
1465                         ['id', 'causer-id', 'owner-id', 'author-id', 'author-link', 'origin', 'post-reason'],
1466                         ['uri-id' => $item['thr-parent-id'], 'uid' => $item['uid']]
1467                 );
1468                 if (!DBA::isResult($parent)) {
1469                         Logger::error('Parent not found', ['uri-id' => $item['thr-parent-id'], 'uid' => $item['uid']]);
1470                         return;
1471                 }
1472
1473                 $author = Contact::selectFirst(['url', 'contact-type', 'network'], ['id' => $item['author-id']]);
1474                 if (!DBA::isResult($author)) {
1475                         Logger::error('Author not found', ['id' => $item['author-id']]);
1476                         return;
1477                 }
1478
1479                 $self_contact = Contact::selectFirst(['id'], ['uid' => $item['uid'], 'self' => true]);
1480                 $self = !empty($self_contact) ? $self_contact['id'] : 0;
1481
1482                 $cid = Contact::getIdForURL($author['url'], $item['uid']);
1483                 if (empty($cid) || (!Contact::isSharing($cid, $item['uid']) && ($cid != $self))) {
1484                         Logger::info('The resharer is not a following contact: quit', ['resharer' => $author['url'], 'uid' => $item['uid'], 'cid' => $cid]);
1485                         return;
1486                 }
1487
1488                 if ($author['contact-type'] != Contact::TYPE_COMMUNITY) {
1489                         if ($parent['post-reason'] == self::PR_ANNOUNCEMENT) {
1490                                 Logger::info('The parent is already marked as announced: quit', ['causer' => $parent['causer-id'], 'owner' => $parent['owner-id'], 'author' => $parent['author-id'], 'uid' => $item['uid']]);
1491                                 return;
1492                         }
1493
1494                         if (Contact::isSharing($parent['owner-id'], $item['uid'])) {
1495                                 Logger::info('The resharer is no group: quit', ['resharer' => $item['author-id'], 'owner' => $parent['owner-id'], 'author' => $parent['author-id'], 'uid' => $item['uid']]);
1496                                 return;
1497                         }
1498                 }
1499
1500                 self::update(['post-reason' => self::PR_ANNOUNCEMENT, 'causer-id' => $item['author-id']], ['id' => $parent['id']]);
1501                 Logger::info('Set announcement post-reason', ['uri-id' => $item['uri-id'], 'thr-parent-id' => $item['thr-parent-id'], 'uid' => $item['uid']]);
1502         }
1503
1504         /**
1505          * Distribute the given item to users who subscribed to their tags
1506          *
1507          * @param array $item     Processed item
1508          */
1509         private static function distributeByTags(array $item)
1510         {
1511                 if (($item['uid'] != 0) || ($item['gravity'] != self::GRAVITY_PARENT) || !in_array($item['network'], Protocol::FEDERATED)) {
1512                         return;
1513                 }
1514
1515                 foreach (Tag::getUIDListByURIId($item['uri-id']) as $uid => $tags) {
1516                         $stored = self::storeForUserByUriId($item['uri-id'], $uid, ['post-reason' => self::PR_TAG]);
1517                         Logger::info('Stored item for users', ['uri-id' => $item['uri-id'], 'uid' => $uid, 'stored' => $stored]);
1518                         foreach ($tags as $tag) {
1519                                 $stored = Category::storeFileByURIId($item['uri-id'], $uid, Category::SUBCRIPTION, $tag);
1520                                 Logger::debug('Stored tag subscription for user', ['uri-id' => $item['uri-id'], 'uid' => $uid, $tag, 'stored' => $stored]);
1521                         }
1522                 }
1523         }
1524
1525         /**
1526          * Distributes public items to the receivers
1527          *
1528          * @param integer $itemid      Item ID that should be added
1529          * @param string  $signed_text Original text (for Diaspora signatures), JSON encoded.
1530          * @throws \Exception
1531          */
1532         public static function distribute(int $itemid, string $signed_text = '')
1533         {
1534                 $condition = ["`id` IN (SELECT `parent` FROM `post-user-view` WHERE `id` = ?)", $itemid];
1535                 $parent = Post::selectFirst(['owner-id'], $condition);
1536                 if (!DBA::isResult($parent)) {
1537                         Logger::warning('Item not found', ['condition' => $condition]);
1538                         return;
1539                 }
1540
1541                 // Only distribute public items from native networks
1542                 $condition = [
1543                         'id' => $itemid, 'uid' => 0,
1544                         'network' => array_merge(Protocol::FEDERATED, ['']),
1545                         'visible' => true, 'deleted' => false, 'private' => [self::PUBLIC, self::UNLISTED]
1546                 ];
1547                 $item = Post::selectFirst(array_merge(self::ITEM_FIELDLIST, ['protocol']), $condition);
1548                 if (!DBA::isResult($item)) {
1549                         Logger::warning('Item not found', ['condition' => $condition]);
1550                         return;
1551                 }
1552
1553                 $origin = $item['origin'];
1554
1555                 $users = [];
1556
1557                 /// @todo add a field "pcid" in the contact table that refers to the public contact id.
1558                 $owner = DBA::selectFirst('contact', ['url', 'nurl', 'alias'], ['id' => $parent['owner-id']]);
1559                 if (!DBA::isResult($owner)) {
1560                         return;
1561                 }
1562
1563                 $condition = ['nurl' => $owner['nurl'], 'rel' => [Contact::SHARING, Contact::FRIEND]];
1564                 $contacts = DBA::select('contact', ['uid'], $condition);
1565                 while ($contact = DBA::fetch($contacts)) {
1566                         if ($contact['uid'] == 0) {
1567                                 continue;
1568                         }
1569
1570                         $users[$contact['uid']] = $contact['uid'];
1571                 }
1572                 DBA::close($contacts);
1573
1574                 $condition = ['alias' => $owner['url'], 'rel' => [Contact::SHARING, Contact::FRIEND]];
1575                 $contacts = DBA::select('contact', ['uid'], $condition);
1576                 while ($contact = DBA::fetch($contacts)) {
1577                         if ($contact['uid'] == 0) {
1578                                 continue;
1579                         }
1580
1581                         $users[$contact['uid']] = $contact['uid'];
1582                 }
1583                 DBA::close($contacts);
1584
1585                 if (!empty($owner['alias'])) {
1586                         $condition = ['nurl' => Strings::normaliseLink($owner['alias']), 'rel' => [Contact::SHARING, Contact::FRIEND]];
1587                         $contacts = DBA::select('contact', ['uid'], $condition);
1588                         while ($contact = DBA::fetch($contacts)) {
1589                                 if ($contact['uid'] == 0) {
1590                                         continue;
1591                                 }
1592
1593                                 $users[$contact['uid']] = $contact['uid'];
1594                         }
1595                         DBA::close($contacts);
1596                 }
1597
1598                 $origin_uid = 0;
1599
1600                 if ($item['uri-id'] != $item['parent-uri-id']) {
1601                         $parents = Post::select(['uid', 'origin'], ["`uri-id` = ? AND `uid` != 0", $item['parent-uri-id']]);
1602                         while ($parent = Post::fetch($parents)) {
1603                                 $users[$parent['uid']] = $parent['uid'];
1604                                 if ($parent['origin'] && !$origin) {
1605                                         $origin_uid = $parent['uid'];
1606                                 }
1607                         }
1608                         DBA::close($parents);
1609                 }
1610
1611                 foreach ($users as $uid) {
1612                         if ($origin_uid == $uid) {
1613                                 $item['diaspora_signed_text'] = $signed_text;
1614                         }
1615                         $item['post-reason'] = self::PR_DISTRIBUTE;
1616                         self::storeForUser($item, $uid);
1617                 }
1618         }
1619
1620         /**
1621          * Store a public item defined by their URI-ID for the given users
1622          *
1623          * @param integer $uri_id     URI-ID of the given item
1624          * @param integer $uid        The user that will receive the item entry
1625          * @param array   $fields     Additional fields to be stored
1626          * @param integer $source_uid User id of the source post
1627          * @return integer stored item id
1628          */
1629         public static function storeForUserByUriId(int $uri_id, int $uid, array $fields = [], int $source_uid = 0): int
1630         {
1631                 if ($uid == $source_uid) {
1632                         Logger::warning('target UID must not be be equal to the source UID', ['uri-id' => $uri_id, 'uid' => $uid]);
1633                         return 0;
1634                 }
1635
1636                 $item = Post::selectFirst(array_merge(self::ITEM_FIELDLIST, ['protocol']), ['uri-id' => $uri_id, 'uid' => $source_uid]);
1637                 if (!DBA::isResult($item)) {
1638                         Logger::warning('Item could not be fetched', ['uri-id' => $uri_id, 'uid' => $source_uid]);
1639                         return 0;
1640                 }
1641
1642                 if (($uid != 0) && ($item['gravity'] == self::GRAVITY_PARENT)) {
1643                         $owner = User::getOwnerDataById($uid);
1644                         if (($owner['contact-type'] == User::ACCOUNT_TYPE_COMMUNITY) && !Tag::isMentioned($uri_id, $owner['url'])) {
1645                                 Logger::info('Target user is a group but is not mentioned here, thread will not be stored', ['uid' => $uid, 'uri-id' => $uri_id]);
1646                                 return 0;
1647                         }
1648                 }
1649
1650                 if (($source_uid == 0) && (($item['private'] == self::PRIVATE) || !in_array($item['network'], Protocol::FEDERATED))) {
1651                         Logger::notice('Item is private or not from a federated network. It will not be stored for the user.', ['uri-id' => $uri_id, 'uid' => $uid, 'private' => $item['private'], 'network' => $item['network']]);
1652                         return 0;
1653                 }
1654
1655                 $item['post-reason'] = self::PR_STORED;
1656
1657                 $item = array_merge($item, $fields);
1658
1659                 if (($uid != 0) && Contact::isSharing(($item['gravity'] == Item::GRAVITY_PARENT) ? $item['owner-id'] : $item['author-id'], $uid)) {
1660                         $item['post-reason'] = self::PR_FOLLOWER;
1661                 }
1662
1663                 $is_reshare = ($item['gravity'] == self::GRAVITY_ACTIVITY) && ($item['verb'] == Activity::ANNOUNCE);
1664
1665                 if (($uid != 0) && (($item['gravity'] == self::GRAVITY_PARENT) || $is_reshare) &&
1666                         DI::pConfig()->get($uid, 'system', 'accept_only_sharer') == self::COMPLETION_NONE &&
1667                         !in_array($item['post-reason'], [self::PR_FOLLOWER, self::PR_TAG, self::PR_TO, self::PR_CC, self::PR_ACTIVITY, self::PR_AUDIENCE])
1668                 ) {
1669                         Logger::info('Contact is not a follower, thread will not be stored', ['author' => $item['author-link'], 'uid' => $uid, 'uri-id' => $uri_id, 'post-reason' => $item['post-reason']]);
1670                         return 0;
1671                 }
1672
1673                 $causer = $item['causer-id'] ?: $item['author-id'];
1674
1675                 if (($uri_id != $item['parent-uri-id']) && ($item['gravity'] == self::GRAVITY_COMMENT) && !Post::exists(['uri-id' => $item['parent-uri-id'], 'uid' => $uid])) {
1676                         if (!self::fetchParent($item['parent-uri-id'], $uid, $causer)) {
1677                                 Logger::info('Parent post had not been added', ['uri-id' => $item['parent-uri-id'], 'uid' => $uid, 'causer' => $causer]);
1678                                 return 0;
1679                         }
1680                         Logger::info('Fetched parent post', ['uri-id' => $item['parent-uri-id'], 'uid' => $uid, 'causer' => $causer]);
1681                 } elseif (($uri_id != $item['thr-parent-id']) && $is_reshare && !Post::exists(['uri-id' => $item['thr-parent-id'], 'uid' => $uid])) {
1682                         if (!self::fetchParent($item['thr-parent-id'], $uid, $causer)) {
1683                                 Logger::info('Thread parent had not been added', ['uri-id' => $item['thr-parent-id'], 'uid' => $uid, 'causer' => $causer]);
1684                                 return 0;
1685                         }
1686                         Logger::info('Fetched thread parent', ['uri-id' => $item['thr-parent-id'], 'uid' => $uid, 'causer' => $causer]);
1687                 }
1688
1689                 $stored = self::storeForUser($item, $uid);
1690                 Logger::info('Item stored for user', ['uri-id' => $item['uri-id'], 'uid' => $uid, 'causer' => $causer, 'source-uid' => $source_uid, 'stored' => $stored]);
1691                 return $stored;
1692         }
1693
1694         /**
1695          * Fetch the parent with the given uri-id
1696          *
1697          * @param integer $uri_id
1698          * @param integer $uid
1699          * @param integer $causer
1700          *
1701          * @return integer
1702          */
1703         private static function fetchParent(int $uri_id, int $uid, int $causer): int
1704         {
1705                 // Fetch the origin user for the post
1706                 $origin_uid = self::GetOriginUidForUriId($uri_id, $uid);
1707                 if (is_null($origin_uid)) {
1708                         Logger::info('Origin item was not found', ['uid' => $uid, 'uri-id' => $uri_id]);
1709                         return 0;
1710                 }
1711
1712                 return self::storeForUserByUriId($uri_id, $uid, ['causer-id' => $causer, 'post-reason' => self::PR_FETCHED], $origin_uid);
1713         }
1714
1715         /**
1716          * Returns the origin uid of a post if the given user is allowed to see it.
1717          *
1718          * @param int $uriid
1719          * @param int $uid
1720          * @return int
1721          */
1722         private static function GetOriginUidForUriId(int $uriid, int $uid)
1723         {
1724                 if (Post::exists(['uri-id' => $uriid, 'uid' => $uid])) {
1725                         return $uid;
1726                 }
1727
1728                 $post = Post::selectFirst(['uid', 'allow_cid', 'allow_gid', 'deny_cid', 'deny_gid', 'private'], ['uri-id' => $uriid, 'origin' => true]);
1729                 if (!empty($post)) {
1730                         if (in_array($post['private'], [Item::PUBLIC, Item::UNLISTED])) {
1731                                 return $post['uid'];
1732                         }
1733
1734                         $pcid = Contact::getPublicIdByUserId($uid);
1735                         if (empty($pcid)) {
1736                                 return null;
1737                         }
1738
1739                         foreach (Item::enumeratePermissions($post, true) as $receiver) {
1740                                 if ($receiver == $pcid) {
1741                                         return $post['uid'];
1742                                 }
1743                         }
1744
1745                         return null;
1746                 }
1747
1748                 if (Post::exists(['uri-id' => $uriid, 'uid' => 0])) {
1749                         return 0;
1750                 }
1751
1752                 // When the post belongs to a a group then all group users are allowed to access it
1753                 foreach (Tag::getByURIId($uriid, [Tag::MENTION, Tag::EXCLUSIVE_MENTION]) as $tag) {
1754                         if (DBA::exists('contact', ['uid' => $uid, 'nurl' => Strings::normaliseLink($tag['url']), 'contact-type' => Contact::TYPE_COMMUNITY])) {
1755                                 $target_uid = User::getIdForURL($tag['url']);
1756                                 if (!empty($target_uid)) {
1757                                         return $target_uid;
1758                                 }
1759                         }
1760                 }
1761
1762                 return null;
1763         }
1764
1765         /**
1766          * Store a public item array for the given users
1767          *
1768          * @param array   $item   The item entry that will be stored
1769          * @param integer $uid    The user that will receive the item entry
1770          * @return integer stored item id
1771          * @throws \Exception
1772          */
1773         private static function storeForUser(array $item, int $uid): int
1774         {
1775                 $post = Post::selectFirst(['id'], ['uri-id' => $item['uri-id'], 'uid' => $uid]);
1776                 if (!empty($post['id'])) {
1777                         if (!empty($item['event-id'])) {
1778                                 $event_post = Post::selectFirst(['event-id'], ['uri-id' => $item['uri-id'], 'uid' => $uid]);
1779                                 if (!empty($event_post['event-id'])) {
1780                                         $event = DBA::selectFirst('event', ['edited', 'start', 'finish', 'summary', 'desc', 'location', 'nofinish'], ['id' => $item['event-id']]);
1781                                         if (!empty($event)) {
1782                                                 // We aren't using "Event::store" here, since we don't want to trigger any further action
1783                                                 $ret = DBA::update('event', $event, ['id' => $event_post['event-id']]);
1784                                                 Logger::info('Event updated', ['uid' => $uid, 'source-event' => $item['event-id'], 'target-event' => $event_post['event-id'], 'ret' => $ret]);
1785                                         }
1786                                 }
1787                         }
1788                         Logger::info('Item already exists', ['uri-id' => $item['uri-id'], 'uid' => $uid, 'id' => $post['id']]);
1789                         return $post['id'];
1790                 }
1791
1792                 // Data from the "post-user" table
1793                 unset($item['id']);
1794                 unset($item['mention']);
1795                 unset($item['starred']);
1796                 unset($item['unseen']);
1797                 unset($item['psid']);
1798                 unset($item['pinned']);
1799                 unset($item['ignored']);
1800                 unset($item['pubmail']);
1801                 unset($item['event-id']);
1802                 unset($item['hidden']);
1803                 unset($item['notification-type']);
1804
1805                 // Data from the "post-delivery-data" table
1806                 unset($item['postopts']);
1807                 unset($item['inform']);
1808
1809                 $item['uid'] = $uid;
1810                 $item['origin'] = 0;
1811                 $item['wall'] = 0;
1812
1813                 $notify = false;
1814                 if ($item['gravity'] == self::GRAVITY_PARENT) {
1815                         $contact = DBA::selectFirst('contact', [], ['id' => $item['contact-id'], 'self' => false]);
1816                         if (DBA::isResult($contact)) {
1817                                 $notify = self::isRemoteSelf($contact, $item);
1818                                 $item['wall'] = (bool)$notify;
1819                         }
1820                 }
1821
1822                 $item['contact-id'] = self::contactId($item);
1823                 $distributed = self::insert($item, $notify);
1824
1825                 if (!$distributed) {
1826                         Logger::info("Distributed item wasn't stored", ['uri-id' => $item['uri-id'], 'user' => $uid]);
1827                 } else {
1828                         Logger::info('Distributed item was stored', ['uri-id' => $item['uri-id'], 'user' => $uid, 'stored' => $distributed]);
1829                 }
1830                 return $distributed;
1831         }
1832
1833         /**
1834          * Add a shadow entry for a given item id that is a thread starter
1835          *
1836          * We store every public item entry additionally with the user id "0".
1837          * This is used for the community page and for the search.
1838          * It is planned that in the future we will store public item entries only once.
1839          *
1840          * @param integer $itemid Item ID that should be added
1841          * @throws \Exception
1842          */
1843         private static function addShadow(int $itemid)
1844         {
1845                 $fields = ['uid', 'private', 'visible', 'deleted', 'network', 'uri-id'];
1846                 $condition = ['id' => $itemid, 'gravity' => self::GRAVITY_PARENT];
1847                 $item = Post::selectFirst($fields, $condition);
1848
1849                 if (!DBA::isResult($item)) {
1850                         return;
1851                 }
1852
1853                 // is it already a copy?
1854                 if (($itemid == 0) || ($item['uid'] == 0)) {
1855                         return;
1856                 }
1857
1858                 // Is it a visible public post?
1859                 if (!$item["visible"] || $item["deleted"]  || ($item["private"] == self::PRIVATE)) {
1860                         return;
1861                 }
1862
1863                 // is it an entry from a connector? Only add an entry for natively connected networks
1864                 if (!in_array($item["network"], array_merge(Protocol::FEDERATED, ['']))) {
1865                         return;
1866                 }
1867
1868                 if (Post::exists(['uri-id' => $item['uri-id'], 'uid' => 0])) {
1869                         return;
1870                 }
1871
1872                 $item = Post::selectFirst(array_merge(self::ITEM_FIELDLIST, ['protocol']), ['id' => $itemid]);
1873
1874                 if (DBA::isResult($item)) {
1875                         // Preparing public shadow (removing user specific data)
1876                         $item['uid'] = 0;
1877                         unset($item['id']);
1878                         unset($item['parent']);
1879                         unset($item['wall']);
1880                         unset($item['mention']);
1881                         unset($item['origin']);
1882                         unset($item['starred']);
1883                         unset($item['postopts']);
1884                         unset($item['inform']);
1885                         unset($item['post-reason']);
1886                         if ($item['uri-id'] == $item['parent-uri-id']) {
1887                                 $item['contact-id'] = $item['owner-id'];
1888                         } else {
1889                                 $item['contact-id'] = $item['author-id'];
1890                         }
1891
1892                         $public_shadow = self::insert($item);
1893
1894                         Logger::info('Stored public shadow', ['thread' => $itemid, 'id' => $public_shadow]);
1895                 }
1896         }
1897
1898         /**
1899          * Add a shadow entry for a given item id that is a comment
1900          *
1901          * This function does the same like the function above - but for comments
1902          *
1903          * @param integer $itemid Item ID that should be added
1904          * @throws \Exception
1905          */
1906         private static function addShadowPost(int $itemid)
1907         {
1908                 $item = Post::selectFirst(array_merge(self::ITEM_FIELDLIST, ['protocol']), ['id' => $itemid]);
1909                 if (!DBA::isResult($item)) {
1910                         return;
1911                 }
1912
1913                 // Is it a toplevel post?
1914                 if ($item['gravity'] == self::GRAVITY_PARENT) {
1915                         self::addShadow($itemid);
1916                         return;
1917                 }
1918
1919                 // Is this a shadow entry?
1920                 if ($item['uid'] == 0) {
1921                         return;
1922                 }
1923
1924                 // Is there a shadow parent?
1925                 if (!Post::exists(['uri-id' => $item['parent-uri-id'], 'uid' => 0])) {
1926                         return;
1927                 }
1928
1929                 // Is there already a shadow entry?
1930                 if (Post::exists(['uri-id' => $item['uri-id'], 'uid' => 0])) {
1931                         return;
1932                 }
1933
1934                 // Save "origin" and "parent" state
1935                 $origin = $item['origin'];
1936                 $parent = $item['parent'];
1937
1938                 // Preparing public shadow (removing user specific data)
1939                 $item['uid'] = 0;
1940                 unset($item['id']);
1941                 unset($item['parent']);
1942                 unset($item['wall']);
1943                 unset($item['mention']);
1944                 unset($item['origin']);
1945                 unset($item['starred']);
1946                 unset($item['postopts']);
1947                 unset($item['inform']);
1948                 unset($item['post-reason']);
1949                 $item['contact-id'] = Contact::getIdForURL($item['author-link']);
1950
1951                 $public_shadow = self::insert($item);
1952
1953                 Logger::info('Stored public shadow', ['uri-id' => $item['uri-id'], 'id' => $public_shadow]);
1954
1955                 // If this was a comment to a Diaspora post we don't get our comment back.
1956                 // This means that we have to distribute the comment by ourselves.
1957                 if ($origin && Post::exists(['id' => $parent, 'network' => Protocol::DIASPORA])) {
1958                         self::distribute($public_shadow);
1959                 }
1960         }
1961
1962         /**
1963          * Adds a language specification in a "language" element of given $arr.
1964          * Expects "body" element to exist in $arr.
1965          *
1966          * @param array $item
1967          * @return string detected language
1968          * @throws \Text_LanguageDetect_Exception
1969          */
1970         private static function getLanguage(array $item): string
1971         {
1972                 if (!empty($item['language'])) {
1973                         return $item['language'];
1974                 }
1975
1976                 if (!in_array($item['gravity'], [self::GRAVITY_PARENT, self::GRAVITY_COMMENT]) || empty($item['body'])) {
1977                         return '';
1978                 }
1979
1980                 $languages = self::getLanguageArray(trim($item['title'] . "\n" . $item['body']), 3);
1981                 if (empty($languages)) {
1982                         return '';
1983                 }
1984
1985                 return json_encode($languages);
1986         }
1987
1988         /**
1989          * Get a language array from a given text
1990          *
1991          * @param string  $body
1992          * @param integer $count
1993          * @return array
1994          */
1995         public static function getLanguageArray(string $body, int $count): array
1996         {
1997                 // Convert attachments to links
1998                 $naked_body = BBCode::removeAttachment($body);
1999                 if (empty($naked_body)) {
2000                         return [];
2001                 }
2002
2003                 // Remove links and pictures
2004                 $naked_body = BBCode::removeLinks($naked_body);
2005
2006                 // Convert the title and the body to plain text
2007                 $naked_body = BBCode::toPlaintext($naked_body);
2008
2009                 // Remove possibly remaining links
2010                 $naked_body = preg_replace(Strings::autoLinkRegEx(), '', $naked_body);
2011
2012                 if (empty($naked_body)) {
2013                         return [];
2014                 }
2015
2016                 $naked_body = self::getDominantLanguage($naked_body);
2017
2018                 $availableLanguages = DI::l10n()->getAvailableLanguages(true);
2019                 $availableLanguages = DI::l10n()->convertForLanguageDetection($availableLanguages);
2020
2021                 $ld = new Language(array_keys($availableLanguages));
2022                 return $ld->detect($naked_body)->limit(0, $count)->close() ?: [];
2023         }
2024
2025         /**
2026          * Check if latin or non latin are dominant in the body and only return the dominant one
2027          *
2028          * @param string $body
2029          * @return string
2030          */
2031         private static function getDominantLanguage(string $body): string
2032         {
2033                 $latin = '';
2034                 $non_latin = '';
2035                 for ($i = 0; $i < mb_strlen($body); $i++) {
2036                         $character = mb_substr($body, $i, 1);
2037                         $ord = mb_ord($character);
2038
2039                         // We add the most common characters to both strings.
2040                         if (($ord <= 64) || ($ord >= 91 && $ord <= 96) || ($ord >= 123 && $ord <= 191) || in_array($ord, [215, 247]) || ($ord >= 697 && $ord <= 735) || ($ord > 65535)) {
2041                                 $latin .= $character;
2042                                 $non_latin .= $character;
2043                         } elseif ($ord < 768) {
2044                                 $latin .= $character;
2045                         } else {
2046                                 $non_latin .= $character;
2047                         }
2048                 }
2049                 return (mb_strlen($latin) > mb_strlen($non_latin)) ? $latin : $non_latin;
2050         }
2051
2052         public static function getLanguageMessage(array $item): string
2053         {
2054                 $iso639 = new \Matriphe\ISO639\ISO639;
2055
2056                 $used_languages = '';
2057                 foreach (json_decode($item['language'], true) as $language => $reliability) {
2058                         $used_languages .= $iso639->languageByCode1($language) . ' (' . $language . "): " . number_format($reliability, 5) . '\n';
2059                 }
2060                 $used_languages = DI::l10n()->t('Detected languages in this post:\n%s', $used_languages);
2061                 return $used_languages;
2062         }
2063
2064         /**
2065          * Creates an unique guid out of a given uri.
2066          * This function is used for messages outside the fediverse (Connector posts, feeds, Mails, ...)
2067          * Posts that are created on this system are using System::createUUID.
2068          * Received ActivityPub posts are using Processor::getGUIDByURL.
2069          *
2070          * @param string      $uri  uri of an item entry
2071          * @param string|null $host hostname for the GUID prefix
2072          * @return string Unique guid
2073          * @throws \Exception
2074          */
2075         public static function guidFromUri(string $uri, string $host = null): string
2076         {
2077                 // Our regular guid routine is using this kind of prefix as well
2078                 // We have to avoid that different routines could accidentally create the same value
2079                 $parsed = parse_url($uri);
2080
2081                 // Remove the scheme to make sure that "https" and "http" doesn't make a difference
2082                 unset($parsed['scheme']);
2083
2084                 $hostPart = $host ?: $parsed['host'] ?? '';
2085                 if (!$hostPart) {
2086                         Logger::warning('Empty host GUID part', ['uri' => $uri, 'host' => $host, 'parsed' => $parsed, 'callstack' => System::callstack(10)]);
2087                 }
2088
2089                 // Glue it together to be able to make a hash from it
2090                 if (!empty($parsed)) {
2091                         $host_id = implode('/', $parsed);
2092                 } else {
2093                         $host_id = $uri;
2094                 }
2095
2096                 // Use a mixture of several hashes to provide some GUID like experience
2097                 return hash('crc32', $hostPart) . '-' . hash('joaat', $host_id) . '-' . hash('fnv164', $host_id);
2098         }
2099
2100         /**
2101          * generate an unique URI
2102          *
2103          * @param string $guid An existing GUID (Otherwise it will be generated)
2104          *
2105          * @return string
2106          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
2107          */
2108         public static function newURI(string $guid = ''): string
2109         {
2110                 if ($guid == '') {
2111                         $guid = System::createUUID();
2112                 }
2113
2114                 return DI::baseUrl() . '/objects/' . $guid;
2115         }
2116
2117         /**
2118          * Set "success_update" and "last-item" to the date of the last time we heard from this contact
2119          *
2120          * This can be used to filter for inactive contacts.
2121          * Only do this for public postings to avoid privacy problems, since poco data is public.
2122          * Don't set this value if it isn't from the owner (could be an author that we don't know)
2123          *
2124          * @param array $arr Contains the just posted item record
2125          * @throws \Exception
2126          */
2127         private static function updateContact(array $arr)
2128         {
2129                 // Unarchive the author
2130                 $contact = DBA::selectFirst('contact', [], ['id' => $arr["author-id"]]);
2131                 if (DBA::isResult($contact)) {
2132                         Contact::unmarkForArchival($contact);
2133                 }
2134
2135                 // Unarchive the contact if it's not our own contact
2136                 $contact = DBA::selectFirst('contact', [], ['id' => $arr["contact-id"], 'self' => false]);
2137                 if (DBA::isResult($contact)) {
2138                         Contact::unmarkForArchival($contact);
2139                 }
2140
2141                 /// @todo On private posts we could obfuscate the date
2142                 $update = ($arr['private'] != self::PRIVATE) || in_array($arr['network'], Protocol::FEDERATED);
2143
2144                 // Is it a group? Then we don't care about the rules from above
2145                 if (!$update && in_array($arr["network"], [Protocol::ACTIVITYPUB, Protocol::DFRN]) && ($arr["parent-uri-id"] === $arr["uri-id"])) {
2146                         if (DBA::exists('contact', ['id' => $arr['contact-id'], 'forum' => true])) {
2147                                 $update = true;
2148                         }
2149                 }
2150
2151                 if ($update) {
2152                         // The "self" contact id is used (for example in the connectors) when the contact is unknown
2153                         // So we have to ensure to only update the last item when it had been our own post,
2154                         // or it had been done by a "regular" contact.
2155                         if (!empty($arr['wall'])) {
2156                                 $condition = ['id' => $arr['contact-id']];
2157                         } else {
2158                                 $condition = ['id' => $arr['contact-id'], 'self' => false];
2159                         }
2160                         Contact::update(['failed' => false, 'local-data' => true, 'success_update' => $arr['received'], 'last-item' => $arr['received']], $condition);
2161                 }
2162                 // Now do the same for the system wide contacts with uid=0
2163                 if ($arr['private'] != self::PRIVATE) {
2164                         Contact::update(
2165                                 ['failed' => false, 'local-data' => true, 'success_update' => $arr['received'], 'last-item' => $arr['received']],
2166                                 ['id' => $arr['owner-id']]
2167                         );
2168
2169                         if ($arr['owner-id'] != $arr['author-id']) {
2170                                 Contact::update(
2171                                         ['failed' => false, 'local-data' => true, 'success_update' => $arr['received'], 'last-item' => $arr['received']],
2172                                         ['id' => $arr['author-id']]
2173                                 );
2174                         }
2175                 }
2176         }
2177
2178         public static function setHashtags(string $body): string
2179         {
2180                 $body = BBCode::performWithEscapedTags($body, ['noparse', 'pre', 'code', 'img'], function ($body) {
2181                         $tags = BBCode::getTags($body);
2182
2183                         // No hashtags?
2184                         if (!count($tags)) {
2185                                 return $body;
2186                         }
2187
2188                         // This sorting is important when there are hashtags that are part of other hashtags
2189                         // Otherwise there could be problems with hashtags like #test and #test2
2190                         // Because of this we are sorting from the longest to the shortest tag.
2191                         usort($tags, function ($a, $b) {
2192                                 return strlen($b) <=> strlen($a);
2193                         });
2194
2195                         $URLSearchString = "^\[\]";
2196
2197                         // All hashtags should point to the home server if "local_tags" is activated
2198                         if (DI::config()->get('system', 'local_tags')) {
2199                                 $body = preg_replace(
2200                                         "/#\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",
2201                                         "#[url=" . DI::baseUrl() . "/search?tag=$2]$2[/url]",
2202                                         $body
2203                                 );
2204                         }
2205
2206                         // mask hashtags inside of url, bookmarks and attachments to avoid urls in urls
2207                         $body = preg_replace_callback(
2208                                 "/\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",
2209                                 function ($match) {
2210                                         return ("[url=" . str_replace("#", "&num;", $match[1]) . "]" . str_replace("#", "&num;", $match[2]) . "[/url]");
2211                                 },
2212                                 $body
2213                         );
2214
2215                         $body = preg_replace_callback(
2216                                 "/\[bookmark\=([$URLSearchString]*)\](.*?)\[\/bookmark\]/ism",
2217                                 function ($match) {
2218                                         return ("[bookmark=" . str_replace("#", "&num;", $match[1]) . "]" . str_replace("#", "&num;", $match[2]) . "[/bookmark]");
2219                                 },
2220                                 $body
2221                         );
2222
2223                         $body = preg_replace_callback(
2224                                 "/\[attachment (.*?)\](.*?)\[\/attachment\]/ism",
2225                                 function ($match) {
2226                                         return ("[attachment " . str_replace("#", "&num;", $match[1]) . "]" . $match[2] . "[/attachment]");
2227                                 },
2228                                 $body
2229                         );
2230
2231                         // Repair recursive urls
2232                         $body = preg_replace(
2233                                 "/&num;\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",
2234                                 "&num;$2",
2235                                 $body
2236                         );
2237
2238                         foreach ($tags as $tag) {
2239                                 if ((strpos($tag, '#') !== 0) || strpos($tag, '[url=') || strlen($tag) < 2 || $tag[1] == '#') {
2240                                         continue;
2241                                 }
2242
2243                                 $basetag = str_replace('_', ' ', substr($tag, 1));
2244                                 $newtag = '#[url=' . DI::baseUrl() . '/search?tag=' . $basetag . ']' . $basetag . '[/url]';
2245
2246                                 $body = str_replace($tag, $newtag, $body);
2247                         }
2248
2249                         // Convert back the masked hashtags
2250                         $body = str_replace("&num;", "#", $body);
2251
2252                         return $body;
2253                 });
2254
2255                 return $body;
2256         }
2257
2258         /**
2259          * look for mention tags and setup a second delivery chain for group/community posts if appropriate
2260          *
2261          * @param int $uid
2262          * @param int $item_id
2263          * @return boolean true if item was deleted, else false
2264          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
2265          * @throws \ImagickException
2266          */
2267         private static function tagDeliver(int $uid, int $item_id): bool
2268         {
2269                 $owner = User::getOwnerDataById($uid);
2270                 if (!DBA::isResult($owner)) {
2271                         Logger::warning('User not found, quitting here.', ['uid' => $uid]);
2272                         return false;
2273                 }
2274
2275                 if ($owner['contact-type'] != User::ACCOUNT_TYPE_COMMUNITY) {
2276                         Logger::debug('Owner is no community, quitting here.', ['uid' => $uid, 'id' => $item_id]);
2277                         return false;
2278                 }
2279
2280                 $item = Post::selectFirst(self::ITEM_FIELDLIST, ['id' => $item_id, 'gravity' => [self::GRAVITY_PARENT, self::GRAVITY_COMMENT], 'origin' => false]);
2281                 if (!DBA::isResult($item)) {
2282                         Logger::debug('Post is an activity or origin or not found at all, quitting here.', ['id' => $item_id]);
2283                         return false;
2284                 }
2285
2286                 if ($item['gravity'] == self::GRAVITY_PARENT) {
2287                         if (Tag::isMentioned($item['uri-id'], $owner['url'])) {
2288                                 Logger::info('Mention found in tag.', ['uri' => $item['uri'], 'uid' => $uid, 'id' => $item_id, 'uri-id' => $item['uri-id'], 'guid' => $item['guid']]);
2289                         } else {
2290                                 Logger::info('Top-level post without mention is deleted.', ['uri' => $item['uri'], $uid, 'id' => $item_id, 'uri-id' => $item['uri-id'], 'guid' => $item['guid']]);
2291                                 Post\User::delete(['uri-id' => $item['uri-id'], 'uid' => $item['uid']]);
2292                                 return true;
2293                         }
2294
2295                         $arr = ['item' => $item, 'user' => $owner];
2296
2297                         Hook::callAll('tagged', $arr);
2298                 } else {
2299                         if (Tag::isMentioned($item['parent-uri-id'], $owner['url'])) {
2300                                 Logger::info('Mention found in parent tag.', ['uri' => $item['uri'], 'uid' => $uid, 'id' => $item_id, 'uri-id' => $item['uri-id'], 'guid' => $item['guid']]);
2301                         } else {
2302                                 Logger::debug('No mentions found in parent, quitting here.', ['id' => $item_id, 'uri-id' => $item['uri-id'], 'guid' => $item['guid']]);
2303                                 return false;
2304                         }
2305                 }
2306
2307                 Logger::info('Community post will be distributed', ['uri' => $item['uri'], 'uid' => $uid, 'id' => $item_id, 'uri-id' => $item['uri-id'], 'guid' => $item['guid']]);
2308
2309                 if ($owner['page-flags'] == User::PAGE_FLAGS_PRVGROUP) {
2310                         $allow_cid = '';
2311                         $allow_gid = '<' . Circle::FOLLOWERS . '>';
2312                         $deny_cid  = '';
2313                         $deny_gid  = '';
2314                         self::performActivity($item['id'], 'announce', $uid, $allow_cid, $allow_gid, $deny_cid, $deny_gid);
2315                 } else {
2316                         self::performActivity($item['id'], 'announce', $uid);
2317                 }
2318
2319                 Logger::info('Community post had been distributed', ['uri' => $item['uri'], 'uid' => $uid, 'id' => $item_id, 'uri-id' => $item['uri-id'], 'guid' => $item['guid']]);
2320                 return false;
2321         }
2322
2323         /**
2324          * Automatically reshare the item if the "remote_self" option is selected
2325          *
2326          * @param array $item
2327          * @return void
2328          */
2329         private static function autoReshare(array $item)
2330         {
2331                 if ($item['gravity'] != self::GRAVITY_PARENT) {
2332                         return;
2333                 }
2334
2335                 $cdata = Contact::getPublicAndUserContactID($item['author-id'], $item['uid']);
2336                 if (empty($cdata['user']) || ($cdata['user'] != $item['contact-id'])) {
2337                         return;
2338                 }
2339
2340                 if (!DBA::exists('contact', ['id' => $cdata['user'], 'remote_self' => LocalRelationship::MIRROR_NATIVE_RESHARE])) {
2341                         return;
2342                 }
2343
2344                 if (!in_array($item['network'], [Protocol::ACTIVITYPUB, Protocol::DFRN])) {
2345                         return;
2346                 }
2347
2348                 if (User::getById($item['uid'], ['blocked'])['blocked'] ?? false) {
2349                         return;
2350                 }
2351
2352                 Logger::info('Automatically reshare item', ['uid' => $item['uid'], 'id' => $item['id'], 'guid' => $item['guid'], 'uri-id' => $item['uri-id']]);
2353
2354                 self::performActivity($item['id'], 'announce', $item['uid']);
2355         }
2356
2357         public static function isRemoteSelf(array $contact, array &$datarray): bool
2358         {
2359                 if ($contact['remote_self'] != LocalRelationship::MIRROR_OWN_POST) {
2360                         return false;
2361                 }
2362
2363                 // Prevent the forwarding of posts that are forwarded
2364                 if (!empty($datarray['extid']) && ($datarray['extid'] == Protocol::DFRN)) {
2365                         Logger::info('Already forwarded');
2366                         return false;
2367                 }
2368
2369                 // Prevent to forward already forwarded posts
2370                 if ($datarray['app'] == DI::baseUrl()->getHost()) {
2371                         Logger::info('Already forwarded (second test)');
2372                         return false;
2373                 }
2374
2375                 // Only forward posts
2376                 if ($datarray['verb'] != Activity::POST) {
2377                         Logger::info('No post');
2378                         return false;
2379                 }
2380
2381                 if (($contact['network'] != Protocol::FEED) && ($datarray['private'] == self::PRIVATE)) {
2382                         Logger::info('Not public');
2383                         return false;
2384                 }
2385
2386                 if (User::getById($contact['uid'], ['blocked'])['blocked'] ?? false) {
2387                         Logger::info('User is blocked', ['contact' => $contact]);
2388                         return false;
2389                 }
2390
2391                 $datarray2 = $datarray;
2392                 Logger::info('remote-self start', ['contact' => $contact['url'], 'remote_self' => $contact['remote_self'], 'item' => $datarray]);
2393
2394                 $self = DBA::selectFirst(
2395                         'contact',
2396                         ['id', 'name', 'url', 'thumb'],
2397                         ['uid' => $contact['uid'], 'self' => true]
2398                 );
2399                 if (!DBA::isResult($self)) {
2400                         Logger::error('Self contact not found', ['uid' => $contact['uid']]);
2401                         return false;
2402                 }
2403
2404                 $datarray['contact-id'] = $self['id'];
2405
2406                 $datarray['author-name']   = $datarray['owner-name']   = $self['name'];
2407                 $datarray['author-link']   = $datarray['owner-link']   = $self['url'];
2408                 $datarray['author-avatar'] = $datarray['owner-avatar'] = $self['thumb'];
2409
2410                 unset($datarray['edited']);
2411
2412                 unset($datarray['network']);
2413                 unset($datarray['owner-id']);
2414                 unset($datarray['author-id']);
2415
2416                 if ($contact['network'] != Protocol::FEED) {
2417                         $old_uri_id = $datarray['uri-id'] ?? 0;
2418                         $datarray['guid'] = System::createUUID();
2419                         unset($datarray['plink']);
2420                         $datarray['uri'] = self::newURI($datarray['guid']);
2421                         $datarray['uri-id'] = ItemURI::getIdByURI($datarray['uri']);
2422                         $datarray['extid'] = Protocol::DFRN;
2423                         $urlpart = parse_url($datarray2['author-link']);
2424                         $datarray['app'] = $urlpart['host'];
2425                         if (!empty($old_uri_id)) {
2426                                 Post\Media::copy($old_uri_id, $datarray['uri-id']);
2427                         }
2428
2429                         unset($datarray['parent-uri']);
2430                         unset($datarray['thr-parent']);
2431
2432                         // Store the original post
2433                         $result = self::insert($datarray2);
2434                         Logger::info('remote-self post original item', ['contact' => $contact['url'], 'result' => $result, 'item' => $datarray2]);
2435                 } else {
2436                         $datarray['private'] = self::PUBLIC;
2437                         $datarray['app'] = 'Feed';
2438                         $result = true;
2439                 }
2440
2441                 return (bool)$result;
2442         }
2443
2444         /**
2445          *
2446          * @param string $s
2447          * @param int    $uid
2448          * @param array  $item
2449          * @param int    $cid
2450          * @return string
2451          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
2452          * @throws \ImagickException
2453          */
2454         public static function fixPrivatePhotos(string $s, int $uid, array $item = null, int $cid = 0): string
2455         {
2456                 if (DI::config()->get('system', 'disable_embedded')) {
2457                         return $s;
2458                 }
2459
2460                 Logger::info('check for photos');
2461                 $site = substr(DI::baseUrl(), strpos(DI::baseUrl(), '://'));
2462
2463                 $orig_body = $s;
2464                 $new_body = '';
2465
2466                 $img_start = strpos($orig_body, '[img');
2467                 $img_st_close = ($img_start !== false ? strpos(substr($orig_body, $img_start), ']') : false);
2468                 $img_len = ($img_start !== false ? strpos(substr($orig_body, $img_start + $img_st_close + 1), '[/img]') : false);
2469
2470                 while (($img_st_close !== false) && ($img_len !== false)) {
2471                         $img_st_close++; // make it point to AFTER the closing bracket
2472                         $image = substr($orig_body, $img_start + $img_st_close, $img_len);
2473
2474                         Logger::info('found photo', ['image' => $image]);
2475
2476                         if (stristr($image, $site . '/photo/')) {
2477                                 // Only embed locally hosted photos
2478                                 $replace = false;
2479                                 $i = basename($image);
2480                                 $i = str_replace(['.jpg', '.png', '.gif'], ['', '', ''], $i);
2481                                 $x = strpos($i, '-');
2482
2483                                 if ($x) {
2484                                         $res = substr($i, $x + 1);
2485                                         $i = substr($i, 0, $x);
2486                                         $photo = Photo::getPhotoForUser($uid, $i, $res);
2487                                         if (DBA::isResult($photo)) {
2488                                                 /*
2489                                                  * Check to see if we should replace this photo link with an embedded image
2490                                                  * 1. No need to do so if the photo is public
2491                                                  * 2. If there's a contact-id provided, see if they're in the access list
2492                                                  *    for the photo. If so, embed it.
2493                                                  * 3. Otherwise, if we have an item, see if the item permissions match the photo
2494                                                  *    permissions, regardless of order but first check to see if they're an exact
2495                                                  *    match to save some processing overhead.
2496                                                  */
2497                                                 if (self::hasPermissions($photo)) {
2498                                                         if ($cid) {
2499                                                                 $recips = self::enumeratePermissions($photo);
2500                                                                 if (in_array($cid, $recips)) {
2501                                                                         $replace = true;
2502                                                                 }
2503                                                         } elseif ($item) {
2504                                                                 if (self::samePermissions($uid, $item, $photo)) {
2505                                                                         $replace = true;
2506                                                                 }
2507                                                         }
2508                                                 }
2509                                                 if ($replace) {
2510                                                         $photo_img = Photo::getImageForPhoto($photo);
2511                                                         // If a custom width and height were specified, apply before embedding
2512                                                         if (preg_match("/\[img\=([0-9]*)x([0-9]*)\]/is", substr($orig_body, $img_start, $img_st_close), $match)) {
2513                                                                 Logger::info('scaling photo');
2514
2515                                                                 $width = intval($match[1]);
2516                                                                 $height = intval($match[2]);
2517
2518                                                                 $photo_img->scaleDown(max($width, $height));
2519                                                         }
2520
2521                                                         $data = $photo_img->asString();
2522                                                         $type = $photo_img->getType();
2523
2524                                                         Logger::info('replacing photo');
2525                                                         $image = 'data:' . $type . ';base64,' . base64_encode($data);
2526                                                         Logger::debug('replaced', ['image' => $image]);
2527                                                 }
2528                                         }
2529                                 }
2530                         }
2531
2532                         $new_body = $new_body . substr($orig_body, 0, $img_start + $img_st_close) . $image . '[/img]';
2533                         $orig_body = substr($orig_body, $img_start + $img_st_close + $img_len + strlen('[/img]'));
2534                         if ($orig_body === false) {
2535                                 $orig_body = '';
2536                         }
2537
2538                         $img_start = strpos($orig_body, '[img');
2539                         $img_st_close = ($img_start !== false ? strpos(substr($orig_body, $img_start), ']') : false);
2540                         $img_len = ($img_start !== false ? strpos(substr($orig_body, $img_start + $img_st_close + 1), '[/img]') : false);
2541                 }
2542
2543                 $new_body = $new_body . $orig_body;
2544
2545                 return $new_body;
2546         }
2547
2548         private static function hasPermissions(array $obj)
2549         {
2550                 return !empty($obj['allow_cid']) || !empty($obj['allow_gid']) ||
2551                         !empty($obj['deny_cid']) || !empty($obj['deny_gid']);
2552         }
2553
2554         // @TODO $uid is unused parameter
2555         private static function samePermissions($uid, array $obj1, array $obj2): bool
2556         {
2557                 // first part is easy. Check that these are exactly the same.
2558                 if (($obj1['allow_cid'] == $obj2['allow_cid'])
2559                         && ($obj1['allow_gid'] == $obj2['allow_gid'])
2560                         && ($obj1['deny_cid'] == $obj2['deny_cid'])
2561                         && ($obj1['deny_gid'] == $obj2['deny_gid'])
2562                 ) {
2563                         return true;
2564                 }
2565
2566                 // This is harder. Parse all the permissions and compare the resulting set.
2567                 $recipients1 = self::enumeratePermissions($obj1);
2568                 $recipients2 = self::enumeratePermissions($obj2);
2569                 sort($recipients1);
2570                 sort($recipients2);
2571
2572                 /// @TODO Comparison of arrays, maybe use array_diff_assoc() here?
2573                 return ($recipients1 == $recipients2);
2574         }
2575
2576         /**
2577          * Returns an array of contact-ids that are allowed to see this object
2578          *
2579          * @param array $obj              Item array with at least uid, allow_cid, allow_gid, deny_cid and deny_gid
2580          * @param bool  $check_dead       Prunes unavailable contacts from the result
2581          * @param bool  $expand_followers Expand the list of followers
2582          * @return array
2583          * @throws \Exception
2584          */
2585         public static function enumeratePermissions(array $obj, bool $check_dead = false, bool $expand_followers = true): array
2586         {
2587                 $aclFormatter = DI::aclFormatter();
2588
2589                 if (!$expand_followers && (!empty($obj['deny_cid']) || !empty($obj['deny_gid']))) {
2590                         $expand_followers = true;
2591                 }
2592
2593                 $allow_people  = $aclFormatter->expand($obj['allow_cid']);
2594                 $allow_circles = Circle::expand($obj['uid'], $aclFormatter->expand($obj['allow_gid']), $check_dead, $expand_followers);
2595                 $deny_people   = $aclFormatter->expand($obj['deny_cid']);
2596                 $deny_circles  = Circle::expand($obj['uid'], $aclFormatter->expand($obj['deny_gid']), $check_dead);
2597                 $recipients    = array_unique(array_merge($allow_people, $allow_circles));
2598                 $deny          = array_unique(array_merge($deny_people, $deny_circles));
2599                 $recipients    = array_diff($recipients, $deny);
2600                 return $recipients;
2601         }
2602
2603         public static function expire(int $uid, int $days, string $network = "", bool $force = false)
2604         {
2605                 if (!$uid || ($days < 1)) {
2606                         return;
2607                 }
2608
2609                 $condition = [
2610                         "`uid` = ? AND NOT `deleted` AND `gravity` = ?",
2611                         $uid, self::GRAVITY_PARENT
2612                 ];
2613
2614                 /*
2615                  * $expire_network_only = save your own wall posts
2616                  * and just expire conversations started by others
2617                  */
2618                 $expire_network_only = DI::pConfig()->get($uid, 'expire', 'network_only', false);
2619
2620                 if ($expire_network_only) {
2621                         $condition[0] .= " AND NOT `wall`";
2622                 }
2623
2624                 if ($network != "") {
2625                         $condition[0] .= " AND `network` = ?";
2626                         $condition[] = $network;
2627                 }
2628
2629                 $condition[0] .= " AND `received` < ?";
2630                 $condition[] = DateTimeFormat::utc('now - ' . $days . ' day');
2631
2632                 $items = Post::select(['resource-id', 'starred', 'id', 'post-type', 'uid', 'uri-id'], $condition);
2633
2634                 if (!DBA::isResult($items)) {
2635                         return;
2636                 }
2637
2638                 $expire_items = (bool)DI::pConfig()->get($uid, 'expire', 'items', true);
2639
2640                 // Forcing expiring of items - but not notes and marked items
2641                 if ($force) {
2642                         $expire_items = true;
2643                 }
2644
2645                 $expire_notes = (bool)DI::pConfig()->get($uid, 'expire', 'notes', true);
2646                 $expire_starred = (bool)DI::pConfig()->get($uid, 'expire', 'starred', true);
2647                 $expire_photos = (bool)DI::pConfig()->get($uid, 'expire', 'photos', false);
2648
2649                 $expired = 0;
2650
2651                 $priority = DI::config()->get('system', 'expire-notify-priority');
2652
2653                 while ($item = Post::fetch($items)) {
2654                         // don't expire filed items
2655                         if (DBA::exists('post-category', ['uri-id' => $item['uri-id'], 'uid' => $item['uid'], 'type' => Post\Category::FILE])) {
2656                                 continue;
2657                         }
2658
2659                         // Only expire posts, not photos and photo comments
2660
2661                         if (!$expire_photos && !empty($item['resource-id'])) {
2662                                 continue;
2663                         } elseif (!$expire_starred && intval($item['starred'])) {
2664                                 continue;
2665                         } elseif (!$expire_notes && ($item['post-type'] == self::PT_PERSONAL_NOTE)) {
2666                                 continue;
2667                         } elseif (!$expire_items && ($item['post-type'] != self::PT_PERSONAL_NOTE)) {
2668                                 continue;
2669                         }
2670
2671                         self::markForDeletionById($item['id'], $priority);
2672
2673                         ++$expired;
2674                 }
2675                 DBA::close($items);
2676                 Logger::notice('Expired', ['user' => $uid, 'days' => $days, 'network' => $network, 'force' => $force, 'expired' => $expired, 'expire items' => $expire_items, 'expire notes' => $expire_notes, 'expire starred' => $expire_starred, 'expire photos' => $expire_photos, 'condition' => $condition]);
2677         }
2678
2679         public static function firstPostDate(int $uid, bool $wall = false)
2680         {
2681                 $user = User::getById($uid, ['register_date']);
2682                 if (empty($user)) {
2683                         return false;
2684                 }
2685
2686                 $condition = [
2687                         "`uid` = ? AND `wall` = ? AND NOT `deleted` AND `visible` AND `received` >= ?",
2688                         $uid, $wall, $user['register_date']
2689                 ];
2690                 $params = ['order' => ['received' => false]];
2691                 $thread = Post::selectFirstThread(['received'], $condition, $params);
2692                 if (DBA::isResult($thread)) {
2693                         $postdate = substr(DateTimeFormat::local($thread['received']), 0, 10);
2694                         return $postdate;
2695                 }
2696                 return false;
2697         }
2698
2699         /**
2700          * add/remove activity to an item
2701          *
2702          * Toggle activities as like,dislike,attend of an item
2703          *
2704          * @param int    $item_id
2705          * @param string $verb
2706          *            Activity verb. One of
2707          *            like, unlike, dislike, undislike, attendyes, unattendyes,
2708          *            attendno, unattendno, attendmaybe, unattendmaybe,
2709          *            announce, unannounce
2710          * @param int    $uid
2711          * @param string $allow_cid
2712          * @param string $allow_gid
2713          * @param string $deny_cid
2714          * @param string $deny_gid
2715          * @return bool
2716          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
2717          * @throws \ImagickException
2718          * @hook  'post_local_end'
2719          *            array $arr
2720          *            'post_id' => ID of posted item
2721          */
2722         public static function performActivity(int $item_id, string $verb, int $uid, string $allow_cid = null, string $allow_gid = null, string $deny_cid = null, string $deny_gid = null): bool
2723         {
2724                 if (empty($uid)) {
2725                         return false;
2726                 }
2727
2728                 Logger::notice('Start create activity', ['verb' => $verb, 'item' => $item_id, 'user' => $uid]);
2729
2730                 $item = Post::selectFirst(self::ITEM_FIELDLIST, ['id' => $item_id]);
2731                 if (!DBA::isResult($item)) {
2732                         Logger::warning('Post had not been fetched', ['id' => $item_id]);
2733                         return false;
2734                 }
2735
2736                 $uri_id = $item['uri-id'];
2737
2738                 if (!in_array($item['uid'], [0, $uid])) {
2739                         return false;
2740                 }
2741
2742                 if (!Post::exists(['uri-id' => $item['parent-uri-id'], 'uid' => $uid])) {
2743                         $stored = self::storeForUserByUriId($item['parent-uri-id'], $uid, ['post-reason' => Item::PR_ACTIVITY]);
2744                         if (($item['parent-uri-id'] == $item['uri-id']) && !empty($stored)) {
2745                                 $item = Post::selectFirst(self::ITEM_FIELDLIST, ['id' => $stored]);
2746                                 if (!DBA::isResult($item)) {
2747                                         Logger::info('Could not fetch just created item - should not happen', ['stored' => $stored, 'uid' => $uid, 'uri-id' => $uri_id]);
2748                                         return false;
2749                                 }
2750                         }
2751                 }
2752
2753                 // Retrieves the local post owner
2754                 $owner = User::getOwnerDataById($uid);
2755                 if (empty($owner)) {
2756                         Logger::info('Empty owner for user', ['uid' => $uid]);
2757                         return false;
2758                 }
2759
2760                 // Retrieve the current logged in user's public contact
2761                 $author_id = Contact::getPublicIdByUserId($uid);
2762                 if (empty($author_id)) {
2763                         Logger::info('Empty public contact');
2764                         return false;
2765                 }
2766
2767                 $activity = null;
2768                 switch ($verb) {
2769                         case 'like':
2770                         case 'unlike':
2771                                 $activity = Activity::LIKE;
2772                                 break;
2773                         case 'dislike':
2774                         case 'undislike':
2775                                 $activity = Activity::DISLIKE;
2776                                 break;
2777                         case 'attendyes':
2778                         case 'unattendyes':
2779                                 $activity = Activity::ATTEND;
2780                                 break;
2781                         case 'attendno':
2782                         case 'unattendno':
2783                                 $activity = Activity::ATTENDNO;
2784                                 break;
2785                         case 'attendmaybe':
2786                         case 'unattendmaybe':
2787                                 $activity = Activity::ATTENDMAYBE;
2788                                 break;
2789                         case 'follow':
2790                         case 'unfollow':
2791                                 $activity = Activity::FOLLOW;
2792                                 break;
2793                         case 'announce':
2794                         case 'unannounce':
2795                                 $activity = Activity::ANNOUNCE;
2796                                 break;
2797                         default:
2798                                 Logger::warning('unknown verb', ['verb' => $verb, 'item' => $item_id]);
2799                                 return false;
2800                 }
2801
2802                 $mode = Strings::startsWith($verb, 'un') ? 'delete' : 'create';
2803
2804                 // Enable activity toggling instead of on/off
2805                 $event_verb_flag = $activity === Activity::ATTEND || $activity === Activity::ATTENDNO || $activity === Activity::ATTENDMAYBE;
2806
2807                 // Look for an existing verb row
2808                 // Event participation activities are mutually exclusive, only one of them can exist at all times.
2809                 if ($event_verb_flag) {
2810                         $verbs = [Activity::ATTEND, Activity::ATTENDNO, Activity::ATTENDMAYBE];
2811
2812                         // Translate to the index based activity index
2813                         $vids = [];
2814                         foreach ($verbs as $verb) {
2815                                 $vids[] = Verb::getID($verb);
2816                         }
2817                 } else {
2818                         $vids = Verb::getID($activity);
2819                 }
2820
2821                 $condition = [
2822                         'vid' => $vids, 'deleted' => false, 'gravity' => self::GRAVITY_ACTIVITY,
2823                         'author-id' => $author_id, 'uid' => $uid, 'thr-parent-id' => $uri_id
2824                 ];
2825                 $like_item = Post::selectFirst(['id', 'guid', 'verb'], $condition);
2826
2827                 if (DBA::isResult($like_item)) {
2828                         /**
2829                          * Truth table for existing activities
2830                          *
2831                          * |          Inputs            ||      Outputs      |
2832                          * |----------------------------||-------------------|
2833                          * |  Mode  | Event | Same verb || Delete? | Return? |
2834                          * |--------|-------|-----------||---------|---------|
2835                          * | create |  Yes  |    Yes    ||   No    |   Yes   |
2836                          * | create |  Yes  |    No     ||   Yes   |   No    |
2837                          * | create |  No   |    Yes    ||   No    |   Yes   |
2838                          * | create |  No   |    No     ||        N/A†       |
2839                          * | delete |  Yes  |    Yes    ||   Yes   |   N/A‡  |
2840                          * | delete |  Yes  |    No     ||   No    |   N/A‡  |
2841                          * | delete |  No   |    Yes    ||   Yes   |   N/A‡  |
2842                          * | delete |  No   |    No     ||        N/A†       |
2843                          * |--------|-------|-----------||---------|---------|
2844                          * |   A    |   B   |     C     || A xor C | !B or C |
2845                          *
2846                          * † Can't happen: It's impossible to find an existing non-event activity without
2847                          *                 the same verb because we are only looking for this single verb.
2848                          *
2849                          * ‡ The "mode = delete" is returning early whether an existing activity was found or not.
2850                          */
2851                         if ($mode == 'create' xor $like_item['verb'] == $activity) {
2852                                 self::markForDeletionById($like_item['id']);
2853                         }
2854
2855                         if (!$event_verb_flag || $like_item['verb'] == $activity) {
2856                                 return true;
2857                         }
2858                 }
2859
2860                 // No need to go further if we aren't creating anything
2861                 if ($mode == 'delete') {
2862                         return true;
2863                 }
2864
2865                 $objtype = $item['resource-id'] ? Activity\ObjectType::IMAGE : Activity\ObjectType::NOTE;
2866
2867                 $new_item = [
2868                         'guid'          => System::createUUID(),
2869                         'uri'           => self::newURI(),
2870                         'uid'           => $uid,
2871                         'contact-id'    => $owner['id'],
2872                         'wall'          => $item['wall'],
2873                         'origin'        => 1,
2874                         'network'       => Protocol::DFRN,
2875                         'protocol'      => Conversation::PARCEL_DIRECT,
2876                         'direction'     => Conversation::PUSH,
2877                         'gravity'       => self::GRAVITY_ACTIVITY,
2878                         'parent'        => $item['id'],
2879                         'thr-parent'    => $item['uri'],
2880                         'owner-id'      => $author_id,
2881                         'author-id'     => $author_id,
2882                         'body'          => $activity,
2883                         'verb'          => $activity,
2884                         'object-type'   => $objtype,
2885                         'allow_cid'     => $allow_cid ?? $item['allow_cid'],
2886                         'allow_gid'     => $allow_gid ?? $item['allow_gid'],
2887                         'deny_cid'      => $deny_cid ?? $item['deny_cid'],
2888                         'deny_gid'      => $deny_gid ?? $item['deny_gid'],
2889                         'visible'       => 1,
2890                         'unseen'        => 1,
2891                 ];
2892
2893                 if (in_array($activity, [Activity::LIKE, Activity::DISLIKE])) {
2894                         $signed = Diaspora::createLikeSignature($uid, $new_item);
2895                         if (!empty($signed)) {
2896                                 $new_item['diaspora_signed_text'] = json_encode($signed);
2897                         }
2898                 }
2899
2900                 self::insert($new_item, true);
2901
2902                 // If the parent item isn't visible then set it to visible
2903                 // @todo Check if this is still needed
2904                 if (!$item['visible']) {
2905                         self::update(['visible' => true], ['id' => $item['id']]);
2906                 }
2907                 return true;
2908         }
2909
2910         /**
2911          * Fetch the SQL condition for the given user id
2912          *
2913          * @param integer $owner_id User ID for which the permissions should be fetched
2914          * @return array condition
2915          */
2916         public static function getPermissionsConditionArrayByUserId(int $owner_id): array
2917         {
2918                 $local_user = DI::userSession()->getLocalUserId();
2919                 $remote_user = DI::userSession()->getRemoteContactID($owner_id);
2920
2921                 // default permissions - anonymous user
2922                 $condition = ["`private` != ?", self::PRIVATE];
2923
2924                 if ($local_user && ($local_user == $owner_id)) {
2925                         // Profile owner - everything is visible
2926                         $condition = [];
2927                 } elseif ($remote_user) {
2928                         // Authenticated visitor - fetch the matching permissionsets
2929                         $permissionSets = DI::permissionSet()->selectByContactId($remote_user, $owner_id);
2930                         if (!empty($set)) {
2931                                 $condition = [
2932                                         "(`private` != ? OR (`private` = ? AND `wall`
2933                                         AND `psid` IN (" . implode(', ', array_fill(0, count($set), '?')) . ")))",
2934                                         self::PRIVATE, self::PRIVATE
2935                                 ];
2936                                 $condition = array_merge($condition, $permissionSets->column('id'));
2937                         }
2938                 }
2939
2940                 return $condition;
2941         }
2942
2943         /**
2944          * Get a permission SQL string for the given user
2945          *
2946          * @param int $owner_id
2947          * @param string $table
2948          * @return string
2949          */
2950         public static function getPermissionsSQLByUserId(int $owner_id, string $table = ''): string
2951         {
2952                 $local_user = DI::userSession()->getLocalUserId();
2953                 $remote_user = DI::userSession()->getRemoteContactID($owner_id);
2954
2955                 if (!empty($table)) {
2956                         $table = DBA::quoteIdentifier($table) . '.';
2957                 }
2958
2959                 /*
2960                  * Construct permissions
2961                  *
2962                  * default permissions - anonymous user
2963                  */
2964                 $sql = sprintf(" AND " . $table . "`private` != %d", self::PRIVATE);
2965
2966                 // Profile owner - everything is visible
2967                 if ($local_user && ($local_user == $owner_id)) {
2968                         $sql = '';
2969                 } elseif ($remote_user) {
2970                         /*
2971                          * Authenticated visitor. Unless pre-verified,
2972                          * check that the contact belongs to this $owner_id
2973                          * and load the circles the visitor belongs to.
2974                          * If pre-verified, the caller is expected to have already
2975                          * done this and passed the circles into this function.
2976                          */
2977                         $permissionSets = DI::permissionSet()->selectByContactId($remote_user, $owner_id);
2978
2979                         if (!empty($set)) {
2980                                 $sql_set = sprintf(" OR (" . $table . "`private` = %d AND " . $table . "`wall` AND " . $table . "`psid` IN (", self::PRIVATE) . implode(',', $permissionSets->column('id')) . "))";
2981                         } else {
2982                                 $sql_set = '';
2983                         }
2984
2985                         $sql = sprintf(" AND (" . $table . "`private` != %d", self::PRIVATE) . $sql_set . ")";
2986                 }
2987
2988                 return $sql;
2989         }
2990
2991         /**
2992          * get translated item type
2993          *
2994          * @param array                $item
2995          * @param \Friendica\Core\L10n $l10n
2996          * @return string
2997          */
2998         public static function postType(array $item, \Friendica\Core\L10n $l10n): string
2999         {
3000                 if (!empty($item['event-id'])) {
3001                         return $l10n->t('event');
3002                 } elseif (!empty($item['resource-id'])) {
3003                         return $l10n->t('photo');
3004                 } elseif ($item['gravity'] == self::GRAVITY_ACTIVITY) {
3005                         return $l10n->t('activity');
3006                 } elseif ($item['gravity'] == self::GRAVITY_COMMENT) {
3007                         return $l10n->t('comment');
3008                 }
3009
3010                 return $l10n->t('post');
3011         }
3012
3013         /**
3014          * Sets the "rendered-html" field of the provided item
3015          *
3016          * Body is preserved to avoid side-effects as we modify it just-in-time for spoilers and private image links
3017          *
3018          * @param array $item
3019          *
3020          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
3021          * @todo Remove reference, simply return "rendered-html" and "rendered-hash"
3022          */
3023         private static function putInCache(&$item)
3024         {
3025                 // Save original body to prevent addons to modify it
3026                 $body = $item['body'];
3027
3028                 $rendered_hash = $item['rendered-hash'] ?? '';
3029                 $rendered_html = $item['rendered-html'] ?? '';
3030
3031                 if (
3032                         $rendered_hash == ''
3033                         || $rendered_html == ''
3034                         || $rendered_hash != hash('md5', BBCode::VERSION . '::' . $body)
3035                         || DI::config()->get('system', 'ignore_cache')
3036                 ) {
3037                         $item['rendered-html'] = BBCode::convertForUriId($item['uri-id'], $item['body']);
3038                         $item['rendered-hash'] = hash('md5', BBCode::VERSION . '::' . $body);
3039
3040                         $hook_data = ['item' => $item, 'rendered-html' => $item['rendered-html'], 'rendered-hash' => $item['rendered-hash']];
3041                         Hook::callAll('put_item_in_cache', $hook_data);
3042                         $item['rendered-html'] = $hook_data['rendered-html'];
3043                         $item['rendered-hash'] = $hook_data['rendered-hash'];
3044                         unset($hook_data);
3045
3046                         // Update if the generated values differ from the existing ones
3047                         if ((($rendered_hash != $item['rendered-hash']) || ($rendered_html != $item['rendered-html'])) && !empty($item['id'])) {
3048                                 self::update(
3049                                         [
3050                                                 'rendered-html' => $item['rendered-html'],
3051                                                 'rendered-hash' => $item['rendered-hash']
3052                                         ],
3053                                         ['id' => $item['id']]
3054                                 );
3055                         }
3056                 }
3057
3058                 $item['body'] = $body;
3059         }
3060
3061         /**
3062          * Given an item array, convert the body element from bbcode to html and add smilie icons.
3063          * If attach is true, also add icons for item attachments.
3064          *
3065          * @param array   $item Record from item table
3066          * @param boolean $attach If true, add icons for item attachments as well
3067          * @param boolean $is_preview Whether this is a preview
3068          * @param boolean $only_cache Whether only cached HTML should be updated
3069          * @return string item body html
3070          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
3071          * @throws \ImagickException
3072          * @hook  prepare_body_init item array before any work
3073          * @hook  prepare_body_content_filter ('item'=>item array, 'filter_reasons'=>string array) before first bbcode to html
3074          * @hook  prepare_body ('item'=>item array, 'html'=>body string, 'is_preview'=>boolean, 'filter_reasons'=>string array) after first bbcode to html
3075          * @hook  prepare_body_final ('item'=>item array, 'html'=>body string) after attach icons and blockquote special case handling (spoiler, author)
3076          */
3077         public static function prepareBody(array &$item, bool $attach = false, bool $is_preview = false, bool $only_cache = false): string
3078         {
3079                 $a = DI::app();
3080                 Hook::callAll('prepare_body_init', $item);
3081
3082
3083                 // In order to provide theme developers more possibilities, event items
3084                 // are treated differently.
3085                 if ($item['object-type'] === Activity\ObjectType::EVENT && isset($item['event-id'])) {
3086                         $ev = Event::getItemHTML($item);
3087                         return $ev;
3088                 }
3089
3090                 $tags = Tag::populateFromItem($item);
3091
3092                 $item['tags'] = $tags['tags'];
3093                 $item['hashtags'] = $tags['hashtags'];
3094                 $item['mentions'] = $tags['mentions'];
3095
3096                 if (!$is_preview) {
3097                         $item['body'] = preg_replace("#\s*\[attachment .*?].*?\[/attachment]\s*#ism", "\n", $item['body']);
3098                         $item['body'] = Post\Media::removeFromEndOfBody($item['body'] ?? '');
3099                         $item['body'] = Post\Media::replaceImage($item['body']);
3100                 }
3101
3102                 $body = $item['body'];
3103                 if ($is_preview) {
3104                         $item['body'] = preg_replace("#\s*\[attachment .*?].*?\[/attachment]\s*#ism", "\n", $item['body']);
3105                 }
3106
3107                 $fields = ['uri-id', 'uri', 'body', 'title', 'author-name', 'author-link', 'author-avatar', 'guid', 'created', 'plink', 'network', 'has-media', 'quote-uri-id', 'post-type'];
3108
3109                 $shared_uri_id      = 0;
3110                 $shared_links       = [];
3111                 $quote_shared_links = [];
3112
3113                 $shared = DI::contentItem()->getSharedPost($item, $fields);
3114                 if (!empty($shared['post'])) {
3115                         $shared_item  = $shared['post'];
3116                         $shared_item['body'] = Post\Media::removeFromEndOfBody($shared_item['body']);
3117                         $shared_item['body'] = Post\Media::replaceImage($shared_item['body']);
3118                         $quote_uri_id = $shared['post']['uri-id'];
3119                         $shared_links[] = strtolower($shared['post']['uri']);
3120                         $item['body'] = BBCode::removeSharedData($item['body']);
3121                 } elseif (empty($shared_item['uri-id']) && empty($item['quote-uri-id']) && ($item['network'] != Protocol::DIASPORA)) {
3122                         $media = Post\Media::getByURIId($item['uri-id'], [Post\Media::ACTIVITY]);
3123                         if (!empty($media)) {
3124                                 $shared_item = Post::selectFirst($fields, ['uri-id' => $media[0]['media-uri-id'], 'uid' => [$item['uid'], 0]]);
3125                                 if (empty($shared_item['uri-id'])) {
3126                                         $shared_item = Post::selectFirst($fields, ['plink' => $media[0]['url'], 'uid' => [$item['uid'], 0]]);
3127                                 } elseif (!in_array(strtolower($media[0]['url']), $shared_links)) {
3128                                         $shared_links[] = strtolower($media[0]['url']);
3129                                 }
3130
3131                                 if (empty($shared_item['uri-id'])) {
3132                                         $shared_item = Post::selectFirst($fields, ['uri' => $media[0]['url'], 'uid' => [$item['uid'], 0]]);
3133                                         $shared_links[] = strtolower($media[0]['url']);
3134                                 }
3135
3136                                 if (!empty($shared_item['uri-id'])) {
3137                                         $data = BBCode::getAttachmentData($shared_item['body']);
3138                                         if (!empty($data['url'])) {
3139                                                 $quote_shared_links[] = $data['url'];
3140                                         }
3141
3142                                         $quote_uri_id = $shared_item['uri-id'];
3143                                 }
3144                         }
3145                 }
3146
3147                 if (!empty($quote_uri_id)) {
3148                         if (isset($shared_item['plink'])) {
3149                                 $item['body'] .= "\n" . DI::contentItem()->createSharedBlockByArray($shared_item, false, true);
3150                         } else {
3151                                 DI::logger()->warning('Missing plink in shared item', ['item' => $item, 'shared' => $shared, 'quote_uri_id' => $quote_uri_id, 'shared_item' => $shared_item]);
3152                         }
3153                 }
3154
3155                 if (!empty($shared_item['uri-id'])) {
3156                         $shared_uri_id = $shared_item['uri-id'];
3157                         $shared_links[] = strtolower($shared_item['plink']);
3158                         $shared_attachments = Post\Media::splitAttachments($shared_uri_id, [], $shared_item['has-media']);
3159                         $shared_links = array_merge($shared_links, array_column($shared_attachments['visual'], 'url'));
3160                         $shared_links = array_merge($shared_links, array_column($shared_attachments['link'], 'url'));
3161                         $shared_links = array_merge($shared_links, array_column($shared_attachments['additional'], 'url'));
3162                         $item['body'] = self::replaceVisualAttachments($shared_attachments, $item['body']);
3163                 }
3164
3165                 $attachments = Post\Media::splitAttachments($item['uri-id'], $shared_links, $item['has-media'] ?? false);
3166                 $item['body'] = self::replaceVisualAttachments($attachments, $item['body'] ?? '');
3167
3168                 self::putInCache($item);
3169                 $item['body'] = $body;
3170                 $s = $item["rendered-html"];
3171
3172                 if ($only_cache) {
3173                         return '';
3174                 }
3175
3176                 // Compile eventual content filter reasons
3177                 $filter_reasons = [];
3178                 if (!$is_preview && DI::userSession()->getPublicContactId() != $item['author-id']) {
3179                         if (!empty($item['user-blocked-author']) || !empty($item['user-blocked-owner'])) {
3180                                 $filter_reasons[] = DI::l10n()->t('%s is blocked', $item['author-name']);
3181                         } elseif (!empty($item['user-ignored-author']) || !empty($item['user-ignored-owner'])) {
3182                                 $filter_reasons[] = DI::l10n()->t('%s is ignored', $item['author-name']);
3183                         } elseif (!empty($item['user-collapsed-author']) || !empty($item['user-collapsed-owner'])) {
3184                                 $filter_reasons[] = DI::l10n()->t('Content from %s is collapsed', $item['author-name']);
3185                         }
3186
3187                         if (!empty($item['content-warning']) && (!DI::userSession()->getLocalUserId() || !DI::pConfig()->get(DI::userSession()->getLocalUserId(), 'system', 'disable_cw', false))) {
3188                                 $filter_reasons[] = DI::l10n()->t('Content warning: %s', $item['content-warning']);
3189                         }
3190
3191                         $item['attachments'] = $attachments;
3192
3193                         $hook_data = [
3194                                 'item' => $item,
3195                                 'filter_reasons' => $filter_reasons
3196                         ];
3197                         Hook::callAll('prepare_body_content_filter', $hook_data);
3198                         $filter_reasons = $hook_data['filter_reasons'];
3199                         unset($hook_data);
3200                 }
3201
3202                 $hook_data = [
3203                         'item' => $item,
3204                         'html' => $s,
3205                         'preview' => $is_preview,
3206                         'filter_reasons' => $filter_reasons
3207                 ];
3208                 Hook::callAll('prepare_body', $hook_data);
3209                 $s = $hook_data['html'];
3210
3211                 unset($hook_data);
3212
3213                 if (!$attach) {
3214                         // Replace the blockquotes with quotes that are used in mails.
3215                         $mailquote = '<blockquote type="cite" class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">';
3216                         $s = str_replace(['<blockquote>', '<blockquote class="spoiler">', '<blockquote class="author">'], [$mailquote, $mailquote, $mailquote], $s);
3217                         return $s;
3218                 }
3219
3220                 if (!empty($shared_attachments)) {
3221                         $s = self::addGallery($s, $shared_attachments, $item['uri-id']);
3222                         $s = self::addVisualAttachments($shared_attachments, $shared_item, $s, true);
3223                         $s = self::addLinkAttachment($shared_uri_id ?: $item['uri-id'], $shared_attachments, $body, $s, true, $quote_shared_links);
3224                         $s = self::addNonVisualAttachments($shared_attachments, $item, $s, true);
3225                         $body = BBCode::removeSharedData($body);
3226                 }
3227
3228                 $pos = strpos($s, BBCode::SHARED_ANCHOR);
3229                 if ($pos) {
3230                         $shared_html = substr($s, $pos + strlen(BBCode::SHARED_ANCHOR));
3231                         $s = substr($s, 0, $pos);
3232                 }
3233
3234                 $s = self::addGallery($s, $attachments, $item['uri-id']);
3235                 $s = self::addVisualAttachments($attachments, $item, $s, false);
3236                 $s = self::addLinkAttachment($item['uri-id'], $attachments, $body, $s, false, $shared_links);
3237                 $s = self::addNonVisualAttachments($attachments, $item, $s, false);
3238                 $s = self::addQuestions($item, $s);
3239
3240                 // Map.
3241                 if (strpos($s, '<div class="map">') !== false && !empty($item['coord'])) {
3242                         $x = Map::byCoordinates(trim($item['coord']));
3243                         if ($x) {
3244                                 $s = preg_replace('/\<div class\=\"map\"\>/', '$0' . $x, $s);
3245                         }
3246                 }
3247
3248                 // Replace friendica image url size with theme preference.
3249                 if (!empty($a->getThemeInfoValue('item_image_size'))) {
3250                         $ps = $a->getThemeInfoValue('item_image_size');
3251                         $s = preg_replace('|(<img[^>]+src="[^"]+/photo/[0-9a-f]+)-[0-9]|', "$1-" . $ps, $s);
3252                 }
3253
3254                 if (!empty($shared_html)) {
3255                         $s .= $shared_html;
3256                 }
3257
3258                 $s = HTML::applyContentFilter($s, $filter_reasons);
3259
3260                 $hook_data = ['item' => $item, 'html' => $s];
3261                 Hook::callAll('prepare_body_final', $hook_data);
3262                 return $hook_data['html'];
3263         }
3264
3265         /**
3266          * @param array $images
3267          * @return string
3268          * @throws \Friendica\Network\HTTPException\ServiceUnavailableException
3269          */
3270         private static function makeImageGrid(array $images): string
3271         {
3272                 // Image for first column (fc) and second column (sc)
3273                 $images_fc = [];
3274                 $images_sc = [];
3275
3276                 for ($i = 0; $i < count($images); $i++) {
3277                         ($i % 2 == 0) ? ($images_fc[] = $images[$i]) : ($images_sc[] = $images[$i]);
3278                 }
3279
3280                 return Renderer::replaceMacros(Renderer::getMarkupTemplate('content/image_grid.tpl'), [
3281                         'columns' => [
3282                                 'fc' => $images_fc,
3283                                 'sc' => $images_sc,
3284                         ],
3285                 ]);
3286         }
3287
3288         /**
3289          * Modify links to pictures to links for the "Fancybox" gallery
3290          *
3291          * @param string $s
3292          * @param array $attachments
3293          * @param integer $uri_id
3294          * @return string
3295          */
3296         private static function addGallery(string $s, array $attachments, int $uri_id): string
3297         {
3298                 foreach ($attachments['visual'] as $attachment) {
3299                         if (empty($attachment['preview']) || ($attachment['type'] != Post\Media::IMAGE)) {
3300                                 continue;
3301                         }
3302                         $s = str_replace('<a href="' . $attachment['url'] . '"', '<a data-fancybox="' . $uri_id . '" href="' . $attachment['url'] . '"', $s);
3303                 }
3304                 return $s;
3305         }
3306
3307         /**
3308          * Check if the body contains a link
3309          *
3310          * @param string $body
3311          * @param string $url
3312          * @param int    $type
3313          * @return bool
3314          */
3315         public static function containsLink(string $body, string $url, int $type = 0): bool
3316         {
3317                 // Make sure that for example site parameters aren't used when testing if the link is contained in the body
3318                 $urlparts = parse_url($url);
3319                 if (empty($urlparts)) {
3320                         return false;
3321                 }
3322
3323                 unset($urlparts['query']);
3324                 unset($urlparts['fragment']);
3325
3326                 try {
3327                         $url = (string)Uri::fromParts($urlparts);
3328                 } catch (\InvalidArgumentException $e) {
3329                         DI::logger()->notice('Invalid URL', ['$url' => $url, '$urlparts' => $urlparts]);
3330                         /* See https://github.com/friendica/friendica/issues/12113
3331                          * Malformed URLs will result in a Fatal Error
3332                          */
3333                         return false;
3334                 }
3335
3336                 // Remove media links to only search in embedded content
3337                 // @todo Check images for image link, audio for audio links, ...
3338                 if (in_array($type, [Post\Media::AUDIO, Post\Media::VIDEO, Post\Media::IMAGE])) {
3339                         $body = preg_replace("/\[url=[^\[\]]*\](.*)\[\/url\]/Usi", ' $1 ', $body);
3340                 }
3341
3342                 if (strpos($body, $url)) {
3343                         return true;
3344                 }
3345
3346                 foreach ([0, 1, 2] as $size) {
3347                         if (
3348                                 preg_match('#/photo/.*-' . $size . '\.#ism', $url) &&
3349                                 strpos(preg_replace('#(/photo/.*)-[012]\.#ism', '$1-' . $size . '.', $body), $url)
3350                         ) {
3351                                 return true;
3352                         }
3353                 }
3354
3355                 return false;
3356         }
3357
3358         /**
3359          * Replace visual attachments in the body
3360          *
3361          * @param array $attachments
3362          * @param string $body
3363          * @return string modified body
3364          */
3365         private static function replaceVisualAttachments(array $attachments, string $body): string
3366         {
3367                 DI::profiler()->startRecording('rendering');
3368
3369                 foreach ($attachments['visual'] as $attachment) {
3370                         if (!empty($attachment['preview'])) {
3371                                 if (Network::isLocalLink($attachment['preview'])) {
3372                                         continue;
3373                                 }
3374                                 $proxy   = Post\Media::getPreviewUrlForId($attachment['id'], Proxy::SIZE_LARGE);
3375                                 $search  = ['[img=' . $attachment['preview'] . ']', ']' . $attachment['preview'] . '[/img]'];
3376                                 $replace = ['[img=' . $proxy . ']', ']' . $proxy . '[/img]'];
3377
3378                                 $body = str_replace($search, $replace, $body);
3379                         } elseif ($attachment['filetype'] == 'image') {
3380                                 if (Network::isLocalLink($attachment['url'])) {
3381                                         continue;
3382                                 }
3383                                 $proxy   = Post\Media::getUrlForId($attachment['id']);
3384                                 $search  = ['[img=' . $attachment['url'] . ']', ']' . $attachment['url'] . '[/img]'];
3385                                 $replace = ['[img=' . $proxy . ']', ']' . $proxy . '[/img]'];
3386
3387                                 $body = str_replace($search, $replace, $body);
3388                         }
3389                 }
3390                 DI::profiler()->stopRecording();
3391                 return $body;
3392         }
3393
3394         /**
3395          * Add visual attachments to the content
3396          *
3397          * @param array $attachments
3398          * @param array $item
3399          * @param string $content
3400          * @return string modified content
3401          */
3402         private static function addVisualAttachments(array $attachments, array $item, string $content, bool $shared): string
3403         {
3404                 DI::profiler()->startRecording('rendering');
3405                 $leading  = '';
3406                 $trailing = '';
3407                 $images   = [];
3408
3409                 // @todo In the future we should make a single for the template engine with all media in it. This allows more flexibilty.
3410                 foreach ($attachments['visual'] as $attachment) {
3411                         if (self::containsLink($item['body'], $attachment['preview'] ?? $attachment['url'], $attachment['type'])) {
3412                                 continue;
3413                         }
3414
3415                         if ($attachment['filetype'] == 'image') {
3416                                 $preview_url = Post\Media::getPreviewUrlForId($attachment['id'], ($attachment['width'] > $attachment['height']) ? Proxy::SIZE_MEDIUM : Proxy::SIZE_LARGE);
3417                         } elseif (!empty($attachment['preview'])) {
3418                                 $preview_url = Post\Media::getPreviewUrlForId($attachment['id'], Proxy::SIZE_LARGE);
3419                         } else {
3420                                 $preview_url = '';
3421                         }
3422
3423                         if ($preview_url && self::containsLink($item['body'], $preview_url)) {
3424                                 continue;
3425                         }
3426
3427                         if (($attachment['filetype'] == 'video')) {
3428                                 /// @todo Move the template to /content as well
3429                                 $media = Renderer::replaceMacros(Renderer::getMarkupTemplate('video_top.tpl'), [
3430                                         '$video' => [
3431                                                 'id'      => $attachment['id'],
3432                                                 'src'     => $attachment['url'],
3433                                                 'name'    => $attachment['name'] ?: $attachment['url'],
3434                                                 'preview' => $preview_url,
3435                                                 'mime'    => $attachment['mimetype'],
3436                                         ],
3437                                 ]);
3438                                 if (($item['post-type'] ?? null) == Item::PT_VIDEO) {
3439                                         $leading .= $media;
3440                                 } else {
3441                                         $trailing .= $media;
3442                                 }
3443                         } elseif ($attachment['filetype'] == 'audio') {
3444                                 $media = Renderer::replaceMacros(Renderer::getMarkupTemplate('content/audio.tpl'), [
3445                                         '$audio' => [
3446                                                 'id'     => $attachment['id'],
3447                                                 'src'    => $attachment['url'],
3448                                                 'name'   => $attachment['name'] ?: $attachment['url'],
3449                                                 'mime'   => $attachment['mimetype'],
3450                                         ],
3451                                 ]);
3452                                 if (($item['post-type'] ?? null) == Item::PT_AUDIO) {
3453                                         $leading .= $media;
3454                                 } else {
3455                                         $trailing .= $media;
3456                                 }
3457                         } elseif ($attachment['filetype'] == 'image') {
3458                                 $src_url = Post\Media::getUrlForId($attachment['id']);
3459                                 if (self::containsLink($item['body'], $src_url)) {
3460                                         continue;
3461                                 }
3462                                 $images[] = ['src' => $src_url, 'preview' => $preview_url, 'attachment' => $attachment, 'uri_id' => $item['uri-id']];
3463                         }
3464                 }
3465
3466                 $media = '';
3467                 if (count($images) > 1) {
3468                         $media = self::makeImageGrid($images);
3469                 } elseif (count($images) == 1) {
3470                         $media = Renderer::replaceMacros(Renderer::getMarkupTemplate('content/image.tpl'), [
3471                                 '$image' => $images[0],
3472                         ]);
3473                 }
3474
3475                 // On Diaspora posts the attached pictures are leading
3476                 if ($item['network'] == Protocol::DIASPORA) {
3477                         $leading .= $media;
3478                 } else {
3479                         $trailing .= $media;
3480                 }
3481
3482                 if ($shared) {
3483                         $content = str_replace(BBCode::TOP_ANCHOR, '<div class="body-attach">' . $leading . '</div>' . BBCode::TOP_ANCHOR, $content);
3484                         $content = str_replace(BBCode::BOTTOM_ANCHOR, '<div class="body-attach">' . $trailing . '</div>' . BBCode::BOTTOM_ANCHOR, $content);
3485                 } else {
3486                         if ($leading != '') {
3487                                 $content = '<div class="body-attach">' . $leading . '</div>' . $content;
3488                         }
3489
3490                         if ($trailing != '') {
3491                                 $content .= '<div class="body-attach">' . $trailing . '</div>';
3492                         }
3493                 }
3494
3495                 DI::profiler()->stopRecording();
3496                 return $content;
3497         }
3498
3499         /**
3500          * Add link attachment to the content
3501          *
3502          * @param array  $attachments
3503          * @param string $body
3504          * @param string $content
3505          * @param bool   $shared
3506          * @param array  $ignore_links A list of URLs to ignore
3507          * @return string modified content
3508          */
3509         private static function addLinkAttachment(int $uriid, array $attachments, string $body, string $content, bool $shared, array $ignore_links): string
3510         {
3511                 DI::profiler()->startRecording('rendering');
3512                 // Don't show a preview when there is a visual attachment (audio or video)
3513                 $types = array_column($attachments['visual'], 'type');
3514                 $preview = !in_array(Post\Media::IMAGE, $types) && !in_array(Post\Media::VIDEO, $types);
3515
3516                 if (!empty($attachments['link'])) {
3517                         foreach ($attachments['link'] as $link) {
3518                                 $found = false;
3519                                 foreach ($ignore_links as $ignore_link) {
3520                                         if (Strings::compareLink($link['url'], $ignore_link)) {
3521                                                 $found = true;
3522                                         }
3523                                 }
3524                                 // @todo Judge between the links to use the one with most information
3525                                 if (!$found && (empty($attachment) || !empty($link['author-name']) ||
3526                                         (empty($attachment['name']) && !empty($link['name'])) ||
3527                                         (empty($attachment['description']) && !empty($link['description'])) ||
3528                                         (empty($attachment['preview']) && !empty($link['preview'])))) {
3529                                         $attachment = $link;
3530                                 }
3531                         }
3532                 }
3533
3534                 if (!empty($attachment)) {
3535                         $data = [
3536                                 'after' => '',
3537                                 'author_name' => $attachment['author-name'] ?? '',
3538                                 'author_url' =>  $attachment['author-url'] ?? '',
3539                                 'description' => $attachment['description'] ?? '',
3540                                 'image' => '',
3541                                 'preview' => '',
3542                                 'provider_name' => $attachment['publisher-name'] ?? '',
3543                                 'provider_url' => $attachment['publisher-url'] ?? '',
3544                                 'text' => '',
3545                                 'title' => $attachment['name'] ?? '',
3546                                 'type' => 'link',
3547                                 'url' => $attachment['url']
3548                         ];
3549
3550                         if ($preview && !empty($attachment['preview'])) {
3551                                 if ($attachment['preview-width'] >= 500) {
3552                                         $data['image'] = Post\Media::getPreviewUrlForId($attachment['id'], Proxy::SIZE_MEDIUM);
3553                                 } else {
3554                                         $data['preview'] = Post\Media::getPreviewUrlForId($attachment['id'], Proxy::SIZE_MEDIUM);
3555                                 }
3556                         }
3557
3558                         if (!empty($data['description']) && !empty($content)) {
3559                                 similar_text($data['description'], $content, $percent);
3560                         } else {
3561                                 $percent = 0;
3562                         }
3563
3564                         if (!empty($data['description']) && (($data['title'] == $data['description']) || ($percent > 95) || (strpos($content, $data['description']) !== false))) {
3565                                 $data['description'] = '';
3566                         }
3567
3568                         if (($data['author_name'] ?? '') == ($data['provider_name'] ?? '')) {
3569                                 $data['author_name'] = '';
3570                         }
3571
3572                         if (($data['author_url'] ?? '') == ($data['provider_url'] ?? '')) {
3573                                 $data['author_url'] = '';
3574                         }
3575                 } elseif (preg_match("/.*(\[attachment.*?\].*?\[\/attachment\]).*/ism", $body, $match)) {
3576                         $data = BBCode::getAttachmentData($match[1]);
3577                 }
3578                 DI::profiler()->stopRecording();
3579
3580                 if (isset($data['url']) && !in_array(strtolower($data['url']), $ignore_links)) {
3581                         if (!empty($data['description']) || !empty($data['image']) || !empty($data['preview']) || (!empty($data['title']) && !Strings::compareLink($data['title'], $data['url']))) {
3582                                 $parts = parse_url($data['url']);
3583                                 if (!empty($parts['scheme']) && !empty($parts['host'])) {
3584                                         if (empty($data['provider_name'])) {
3585                                                 $data['provider_name'] = $parts['host'];
3586                                         }
3587                                         if (empty($data['provider_url']) || empty(parse_url($data['provider_url'], PHP_URL_SCHEME))) {
3588                                                 $data['provider_url'] = $parts['scheme'] . '://' . $parts['host'];
3589
3590                                                 if (!empty($parts['port'])) {
3591                                                         $data['provider_url'] .= ':' . $parts['port'];
3592                                                 }
3593                                         }
3594                                 }
3595
3596                                 // @todo Use a template
3597                                 $preview_mode = DI::pConfig()->get(DI::userSession()->getLocalUserId(), 'system', 'preview_mode', BBCode::PREVIEW_LARGE);
3598                                 if ($preview_mode != BBCode::PREVIEW_NONE) {
3599                                         $rendered = BBCode::convertAttachment('', BBCode::INTERNAL, false, $data, $uriid, $preview_mode);
3600                                 } else {
3601                                         $rendered = '';
3602                                 }
3603                         } elseif (!self::containsLink($content, $data['url'], Post\Media::HTML)) {
3604                                 $rendered = Renderer::replaceMacros(Renderer::getMarkupTemplate('content/link.tpl'), [
3605                                         '$url'   => $data['url'],
3606                                         '$title' => $data['title'],
3607                                 ]);
3608                         } else {
3609                                 return $content;
3610                         }
3611
3612                         if ($shared) {
3613                                 return str_replace(BBCode::BOTTOM_ANCHOR, BBCode::BOTTOM_ANCHOR . $rendered, $content);
3614                         } else {
3615                                 return $content . $rendered;
3616                         }
3617                 }
3618                 return $content;
3619         }
3620
3621         /**
3622          * Add non visual attachments to the content
3623          *
3624          * @param array $attachments
3625          * @param array $item
3626          * @param string $content
3627          * @return string modified content
3628          */
3629         private static function addNonVisualAttachments(array $attachments, array $item, string $content): string
3630         {
3631                 DI::profiler()->startRecording('rendering');
3632                 $trailing = '';
3633                 foreach ($attachments['additional'] as $attachment) {
3634                         if (strpos($item['body'], $attachment['url'])) {
3635                                 continue;
3636                         }
3637
3638                         $author = [
3639                                 'uid'     => 0,
3640                                 'id'      => $item['author-id'],
3641                                 'network' => $item['author-network'],
3642                                 'url'     => $item['author-link'],
3643                                 'alias'   => $item['author-alias']
3644                         ];
3645                         $the_url = Contact::magicLinkByContact($author, $attachment['url']);
3646
3647                         $title = Strings::escapeHtml(trim(($attachment['description'] ?? '') ?: $attachment['url']));
3648
3649                         if (!empty($attachment['size'])) {
3650                                 $title .= ' ' . $attachment['size'] . ' ' . DI::l10n()->t('bytes');
3651                         }
3652
3653                         /// @todo Use a template
3654                         $icon = '<div class="attachtype icon s22 type-' . $attachment['filetype'] . ' subtype-' . $attachment['subtype'] . '"></div>';
3655                         $trailing .= '<a href="' . strip_tags($the_url) . '" title="' . $title . '" class="attachlink" target="_blank" rel="noopener noreferrer" >' . $icon . '</a>';
3656                 }
3657
3658                 if ($trailing != '') {
3659                         $content .= '<div class="body-attach">' . $trailing . '</div>';
3660                 }
3661
3662                 DI::profiler()->stopRecording();
3663                 return $content;
3664         }
3665
3666         private static function addQuestions(array $item, string $content): string
3667         {
3668                 DI::profiler()->startRecording('rendering');
3669                 if (!empty($item['question-id'])) {
3670                         $question = [
3671                                 'id'       => $item['question-id'],
3672                                 'multiple' => $item['question-multiple'],
3673                                 'voters'   => $item['question-voters'],
3674                                 'endtime'  => $item['question-end-time']
3675                         ];
3676
3677                         $options = Post\QuestionOption::getByURIId($item['uri-id']);
3678                         foreach ($options as $key => $option) {
3679                                 if ($question['voters'] > 0) {
3680                                         $percent = $option['replies'] / $question['voters'] * 100;
3681                                         $options[$key]['vote'] = DI::l10n()->tt('%2$s (%3$d%%, %1$d vote)', '%2$s (%3$d%%, %1$d votes)', $option['replies'], $option['name'], round($percent, 1));
3682                                 } else {
3683                                         $options[$key]['vote'] = DI::l10n()->tt('%2$s (%1$d vote)', '%2$s (%1$d votes)', $option['replies'], $option['name']);
3684                                 }
3685                         }
3686
3687                         if (!empty($question['voters']) && !empty($question['endtime'])) {
3688                                 $summary = DI::l10n()->tt('%d voter. Poll end: %s', '%d voters. Poll end: %s', $question['voters'], Temporal::getRelativeDate($question['endtime']));
3689                         } elseif (!empty($question['voters'])) {
3690                                 $summary = DI::l10n()->tt('%d voter.', '%d voters.', $question['voters']);
3691                         } elseif (!empty($question['endtime'])) {
3692                                 $summary = DI::l10n()->t('Poll end: %s', Temporal::getRelativeDate($question['endtime']));
3693                         } else {
3694                                 $summary = '';
3695                         }
3696
3697                         $content .= Renderer::replaceMacros(Renderer::getMarkupTemplate('content/question.tpl'), [
3698                                 '$question' => $question,
3699                                 '$options'  => $options,
3700                                 '$summary'  => $summary,
3701                         ]);
3702                 }
3703                 DI::profiler()->stopRecording();
3704                 return $content;
3705         }
3706
3707         /**
3708          * get private link for item
3709          *
3710          * @param array $item
3711          * @return boolean|array False if item has not plink, otherwise array('href'=>plink url, 'title'=>translated title)
3712          * @throws \Exception
3713          */
3714         public static function getPlink(array $item)
3715         {
3716                 if (!empty($item['plink']) && Network::isValidHttpUrl($item['plink'])) {
3717                         $plink = $item['plink'];
3718                 } elseif (!empty($item['uri']) && Network::isValidHttpUrl($item['uri']) && !Network::isLocalLink($item['uri'])) {
3719                         $plink = $item['uri'];
3720                 }
3721
3722                 if (DI::userSession()->getLocalUserId()) {
3723                         $ret = [
3724                                 'href' => "display/" . $item['guid'],
3725                                 'orig' => "display/" . $item['guid'],
3726                                 'title' => DI::l10n()->t('View on separate page'),
3727                                 'orig_title' => DI::l10n()->t('View on separate page'),
3728                         ];
3729
3730                         if (!empty($plink) && ($item['private'] == self::PRIVATE)) {
3731                                 $author = [
3732                                         'uid'     => 0,
3733                                         'id'      => $item['author-id'],
3734                                         'network' => $item['author-network'],
3735                                         'url'     => $item['author-link'],
3736                                         'alias'   => $item['author-alias'],
3737                                 ];
3738                                 $plink = Contact::magicLinkByContact($author, $plink);
3739                         }
3740
3741                         if (!empty($plink)) {
3742                                 $ret['href'] = DI::baseUrl()->remove($plink);
3743                                 $ret['title'] = DI::l10n()->t('Link to source');
3744                         }
3745                 } elseif (!empty($plink) && ($item['private'] != self::PRIVATE)) {
3746                         $ret = [
3747                                 'href' => $plink,
3748                                 'orig' => $plink,
3749                                 'title' => DI::l10n()->t('Link to source'),
3750                                 'orig_title' => DI::l10n()->t('Link to source'),
3751                         ];
3752                 } else {
3753                         $ret = [];
3754                 }
3755
3756                 return $ret;
3757         }
3758
3759         /**
3760          * Does the given uri-id belongs to a post that is sent as starting post to a group?
3761          * This does apply to posts that are sent via ! and not in parallel to a group via @
3762          *
3763          * @param int $uri_id
3764          *
3765          * @return boolean "true" when it is a group post
3766          */
3767         public static function isGroupPost(int $uri_id): bool
3768         {
3769                 if (Post::exists(['private' => Item::PUBLIC, 'uri-id' => $uri_id])) {
3770                         return false;
3771                 }
3772
3773                 foreach (Tag::getByURIId($uri_id, [Tag::EXCLUSIVE_MENTION, Tag::AUDIENCE]) as $tag) {
3774                         // @todo Possibly check for a public audience in the future, see https://socialhub.activitypub.rocks/t/fep-1b12-group-federation/2724
3775                         // and https://codeberg.org/fediverse/fep/src/branch/main/feps/fep-1b12.md
3776                         if (DBA::exists('contact', ['uid' => 0, 'nurl' => Strings::normaliseLink($tag['url']), 'contact-type' => Contact::TYPE_COMMUNITY])) {
3777                                 return true;
3778                         }
3779                 }
3780                 return false;
3781         }
3782
3783         /**
3784          * Search item id for given URI or plink
3785          *
3786          * @param string $uri
3787          * @param integer $uid
3788          *
3789          * @return integer item id
3790          */
3791         public static function searchByLink(string $uri, int $uid = 0): int
3792         {
3793                 $ssl_uri = str_replace('http://', 'https://', $uri);
3794                 $uris = [$uri, $ssl_uri, Strings::normaliseLink($uri)];
3795
3796                 $item = Post::selectFirst(['id'], ['uri' => $uris, 'uid' => $uid]);
3797                 if (DBA::isResult($item)) {
3798                         return $item['id'];
3799                 }
3800
3801                 $item = Post::selectFirst(['id'], ['plink' => $uris, 'uid' => $uid]);
3802                 if (DBA::isResult($item)) {
3803                         return $item['id'];
3804                 }
3805
3806                 return 0;
3807         }
3808
3809         /**
3810          * Return the URI for a link to the post
3811          *
3812          * @param string $uri URI or link to post
3813          *
3814          * @return string URI
3815          */
3816         public static function getURIByLink(string $uri): string
3817         {
3818                 $ssl_uri = str_replace('http://', 'https://', $uri);
3819                 $uris = [$uri, $ssl_uri, Strings::normaliseLink($uri)];
3820
3821                 $item = Post::selectFirst(['uri'], ['uri' => $uris]);
3822                 if (DBA::isResult($item)) {
3823                         return $item['uri'];
3824                 }
3825
3826                 $item = Post::selectFirst(['uri'], ['plink' => $uris]);
3827                 if (DBA::isResult($item)) {
3828                         return $item['uri'];
3829                 }
3830
3831                 return '';
3832         }
3833
3834         /**
3835          * Fetches item for given URI or plink
3836          *
3837          * @param string $uri
3838          * @param integer $uid
3839          *
3840          * @return integer item id
3841          */
3842         public static function fetchByLink(string $uri, int $uid = 0): int
3843         {
3844                 Logger::info('Trying to fetch link', ['uid' => $uid, 'uri' => $uri]);
3845                 $item_id = self::searchByLink($uri, $uid);
3846                 if (!empty($item_id)) {
3847                         Logger::info('Link found', ['uid' => $uid, 'uri' => $uri, 'id' => $item_id]);
3848                         return $item_id;
3849                 }
3850
3851                 $hookData = [
3852                         'uri'     => $uri,
3853                         'uid'     => $uid,
3854                         'item_id' => null,
3855                 ];
3856
3857                 Hook::callAll('item_by_link', $hookData);
3858
3859                 if (isset($hookData['item_id'])) {
3860                         return is_numeric($hookData['item_id']) ? $hookData['item_id'] : 0;
3861                 }
3862
3863                 $fetched_uri = ActivityPub\Processor::fetchMissingActivity($uri, [], '', ActivityPub\Receiver::COMPLETION_MANUAL, $uid);
3864
3865                 if ($fetched_uri) {
3866                         $item_id = self::searchByLink($fetched_uri, $uid);
3867                 } else {
3868                         $item_id = Diaspora::fetchByURL($uri);
3869                 }
3870
3871                 if (!empty($item_id)) {
3872                         Logger::info('Link fetched', ['uid' => $uid, 'uri' => $uri, 'id' => $item_id]);
3873                         return $item_id;
3874                 }
3875
3876                 Logger::info('Link not found', ['uid' => $uid, 'uri' => $uri]);
3877                 return 0;
3878         }
3879
3880         /**
3881          * Fetch the uri-id of a quote
3882          *
3883          * @param string $body
3884          * @return integer
3885          */
3886         public static function getQuoteUriId(string $body, int $uid = 0): int
3887         {
3888                 $shared = BBCode::fetchShareAttributes($body);
3889                 if (empty($shared['guid']) && empty($shared['message_id'])) {
3890                         return 0;
3891                 }
3892
3893                 if (empty($shared['link']) && empty($shared['message_id'])) {
3894                         Logger::notice('Invalid share block.', ['share' => $shared]);
3895                         return 0;
3896                 }
3897
3898                 if (!empty($shared['guid'])) {
3899                         $shared_item = Post::selectFirst(['uri-id'], ['guid' => $shared['guid'], 'uid' => [0, $uid]]);
3900                         if (!empty($shared_item['uri-id'])) {
3901                                 Logger::debug('Found post by guid', ['guid' => $shared['guid'], 'uid' => $uid]);
3902                                 return $shared_item['uri-id'];
3903                         }
3904                 }
3905
3906                 if (!empty($shared['message_id'])) {
3907                         $shared_item = Post::selectFirst(['uri-id'], ['uri' => $shared['message_id'], 'uid' => [0, $uid]]);
3908                         if (!empty($shared_item['uri-id'])) {
3909                                 Logger::debug('Found post by message_id', ['message_id' => $shared['message_id'], 'uid' => $uid]);
3910                                 return $shared_item['uri-id'];
3911                         }
3912                 }
3913
3914                 if (!empty($shared['link'])) {
3915                         $shared_item = Post::selectFirst(['uri-id'], ['plink' => $shared['link'], 'uid' => [0, $uid]]);
3916                         if (!empty($shared_item['uri-id'])) {
3917                                 Logger::debug('Found post by link', ['link' => $shared['link'], 'uid' => $uid]);
3918                                 return $shared_item['uri-id'];
3919                         }
3920                 }
3921
3922                 $url = $shared['message_id'] ?: $shared['link'];
3923                 $id = self::fetchByLink($url);
3924                 if (!$id) {
3925                         Logger::notice('Post could not be fetched.', ['url' => $url, 'uid' => $uid]);
3926                         return 0;
3927                 }
3928
3929                 $shared_item = Post::selectFirst(['uri-id'], ['id' => $id]);
3930                 if (!empty($shared_item['uri-id'])) {
3931                         Logger::debug('Fetched shared post', ['id' => $id, 'url' => $url, 'uid' => $uid]);
3932                         return $shared_item['uri-id'];
3933                 }
3934
3935                 Logger::warning('Post does not exist although it was supposed to had been fetched.', ['id' => $id, 'url' => $url, 'uid' => $uid]);
3936                 return 0;
3937         }
3938 }