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\Image;
  26 use Friendica\Content\Post\Collection\PostMedias;
  27 use Friendica\Content\Post\Entity\PostMedia;
  28 use Friendica\Content\Text\BBCode;
  29 use Friendica\Content\Text\HTML;
  30 use Friendica\Core\Hook;
  31 use Friendica\Core\Logger;
  32 use Friendica\Core\Protocol;
  33 use Friendica\Core\Renderer;
  34 use Friendica\Core\System;
  35 use Friendica\Core\Worker;
  36 use Friendica\Database\DBA;
  37 use Friendica\DI;
  38 use Friendica\Model\Post\Category;
  39 use Friendica\Network\HTTPException\InternalServerErrorException;
  40 use Friendica\Network\HTTPException\ServiceUnavailableException;
  41 use Friendica\Protocol\Activity;
  42 use Friendica\Protocol\ActivityPub;
  43 use Friendica\Protocol\Delivery;
  44 use Friendica\Protocol\Diaspora;
  45 use Friendica\Util\DateTimeFormat;
  46 use Friendica\Util\Map;
  47 use Friendica\Util\Network;
  48 use Friendica\Util\Proxy;
  49 use Friendica\Util\Strings;
  50 use Friendica\Util\Temporal;
  51 use GuzzleHttp\Psr7\Uri;
  52 use LanguageDetection\Language;
  53
  54 class Item
  55 {
  56         // Posting types, inspired by https://www.w3.org/TR/activitystreams-vocabulary/#object-types
  57         const PT_ARTICLE = 0;
  58         const PT_NOTE = 1;
  59         const PT_PAGE = 2;
  60         const PT_IMAGE = 16;
  61         const PT_AUDIO = 17;
  62         const PT_VIDEO = 18;
  63         const PT_DOCUMENT = 19;
  64         const PT_EVENT = 32;
  65         const PT_POLL = 33;
  66         const PT_PERSONAL_NOTE = 128;
  67
  68         // Posting reasons (Why had a post been stored for a user?)
  69         const PR_NONE = 0;
  70         const PR_TAG = 64;
  71         const PR_TO = 65;
  72         const PR_CC = 66;
  73         const PR_BTO = 67;
  74         const PR_BCC = 68;
  75         const PR_FOLLOWER = 69;
  76         const PR_ANNOUNCEMENT = 70;
  77         const PR_COMMENT = 71;
  78         const PR_STORED = 72;
  79         const PR_GLOBAL = 73;
  80         const PR_RELAY = 74;
  81         const PR_FETCHED = 75;
  82         const PR_COMPLETION = 76;
  83         const PR_DIRECT = 77;
  84         const PR_ACTIVITY = 78;
  85         const PR_DISTRIBUTE = 79;
  86         const PR_PUSHED = 80;
  87         const PR_LOCAL = 81;
  88         const PR_AUDIENCE = 82;
  89
  90         // system.accept_only_sharer setting values
  91         const COMPLETION_NONE    = 1;
  92         const COMPLETION_COMMENT = 0;
  93         const COMPLETION_LIKE    = 2;
  94
  95         // Field list that is used to display the items
  96         const DISPLAY_FIELDLIST = [
  97                 'uid', 'id', 'parent', 'guid', 'network', 'gravity',
  98                 'uri-id', 'uri', 'thr-parent-id', 'thr-parent', 'parent-uri-id', 'parent-uri', 'conversation',
  99                 'commented', 'created', 'edited', 'received', 'verb', 'object-type', 'postopts', 'plink',
 100                 'wall', 'private', 'starred', 'origin', 'parent-origin', 'title', 'body', 'language',
 101                 'content-warning', 'location', 'coord', 'app', 'rendered-hash', 'rendered-html', 'object',
 102                 'quote-uri', 'quote-uri-id', 'allow_cid', 'allow_gid', 'deny_cid', 'deny_gid', 'mention', 'global',
 103                 'author-id', 'author-link', 'author-alias', 'author-name', 'author-avatar', 'author-network', 'author-updated', 'author-gsid', 'author-baseurl', 'author-addr', 'author-uri-id',
 104                 'owner-id', 'owner-link', 'owner-alias', 'owner-name', 'owner-avatar', 'owner-network', 'owner-contact-type', 'owner-updated', 'owner-gsid',
 105                 'causer-id', 'causer-link', 'causer-alias', 'causer-name', 'causer-avatar', 'causer-contact-type', 'causer-network', 'causer-gsid',
 106                 'contact-id', 'contact-uid', 'contact-link', 'contact-name', 'contact-avatar',
 107                 'writable', 'self', 'cid', 'alias',
 108                 'event-created', 'event-edited', 'event-start', 'event-finish',
 109                 'event-summary', 'event-desc', 'event-location', 'event-type',
 110                 'event-nofinish', 'event-ignore', 'event-id',
 111                 'question-id', 'question-multiple', 'question-voters', 'question-end-time',
 112                 'has-categories', 'has-media',
 113                 'delivery_queue_count', 'delivery_queue_done', 'delivery_queue_failed'
 114         ];
 115
 116         // Field list that is used to deliver items via the protocols
 117         const DELIVER_FIELDLIST = [
 118                 'uid', 'id', 'parent', 'uri-id', 'uri', 'thr-parent', 'parent-uri', 'guid',
 119                 'parent-guid', 'conversation', 'received', 'created', 'edited', 'verb', 'object-type', 'object', 'target',
 120                 'private', 'title', 'body', 'raw-body', 'location', 'coord', 'app',
 121                 'inform', 'deleted', 'extid', 'post-type', 'post-reason', 'gravity',
 122                 'allow_cid', 'allow_gid', 'deny_cid', 'deny_gid',
 123                 'author-id', 'author-addr', 'author-link', 'author-name', 'author-avatar', 'owner-id', 'owner-link', 'contact-uid',
 124                 'signed_text', 'network', 'wall', 'contact-id', 'plink', 'origin',
 125                 'thr-parent-id', 'parent-uri-id', 'quote-uri', 'quote-uri-id', 'postopts', 'pubmail',
 126                 'event-created', 'event-edited', 'event-start', 'event-finish',
 127                 'event-summary', 'event-desc', 'event-location', 'event-type',
 128                 'event-nofinish', 'event-ignore', 'event-id'
 129         ];
 130
 131         // All fields in the item table
 132         const ITEM_FIELDLIST = [
 133                 'id', 'uid', 'parent', 'uri', 'parent-uri', 'thr-parent',
 134                 'guid', 'uri-id', 'parent-uri-id', 'thr-parent-id', 'conversation', 'vid',
 135                 'quote-uri', 'quote-uri-id', 'contact-id', 'wall', 'gravity', 'extid', 'psid',
 136                 'created', 'edited', 'commented', 'received', 'changed', 'verb',
 137                 'postopts', 'plink', 'resource-id', 'event-id', 'inform',
 138                 'allow_cid', 'allow_gid', 'deny_cid', 'deny_gid', 'post-type', 'post-reason',
 139                 'private', 'pubmail', 'visible', 'starred',
 140                 'unseen', 'deleted', 'origin', 'mention', 'global', 'network',
 141                 'title', 'content-warning', 'body', 'location', 'coord', 'app',
 142                 'rendered-hash', 'rendered-html', 'object-type', 'object', 'target-type', 'target',
 143                 'author-id', 'author-link', 'author-name', 'author-avatar', 'author-network',
 144                 'owner-id', 'owner-link', 'owner-name', 'owner-avatar', 'causer-id'
 145         ];
 146
 147         // List of all verbs that don't need additional content data.
 148         // Never reorder or remove entries from this list. Just add new ones at the end, if needed.
 149         const ACTIVITIES = [
 150                 Activity::LIKE, Activity::DISLIKE,
 151                 Activity::ATTEND, Activity::ATTENDNO, Activity::ATTENDMAYBE,
 152                 Activity::FOLLOW,
 153                 Activity::ANNOUNCE
 154         ];
 155
 156         // Privacy levels
 157         const PUBLIC = 0;
 158         const PRIVATE = 1;
 159         const UNLISTED = 2;
 160
 161         // Item weight for query ordering
 162         const GRAVITY_PARENT   = 0;
 163         const GRAVITY_ACTIVITY = 3;
 164         const GRAVITY_COMMENT  = 6;
 165         const GRAVITY_UNKNOWN  = 9;
 166
 167         /**
 168          * Update existing item entries
 169          *
 170          * @param array $fields    The fields that are to be changed
 171          * @param array $condition The condition for finding the item entries
 172          *
 173          * In the future we may have to change permissions as well.
 174          * Then we had to add the user id as third parameter.
 175          *
 176          * A return value of "0" doesn't mean an error - but that 0 rows had been changed.
 177          *
 178          * @return integer|boolean number of affected rows - or "false" if there was an error
 179          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 180          */
 181         public static function update(array $fields, array $condition)
 182         {
 183                 if (empty($condition) || empty($fields)) {
 184                         return false;
 185                 }
 186
 187                 if (isset($fields['extid'])) {
 188                         $fields['external-id'] = ItemURI::getIdByURI($fields['extid']);
 189                 }
 190
 191                 if (!empty($fields['verb'])) {
 192                         $fields['vid'] = Verb::getID($fields['verb']);
 193                 }
 194
 195                 if (!empty($fields['edited'])) {
 196                         $previous = Post::selectFirst(['edited'], $condition);
 197                 }
 198
 199                 $rows = Post::update($fields, $condition);
 200                 if (is_bool($rows)) {
 201                         return $rows;
 202                 }
 203
 204                 // We only need to call the line by line update for specific fields
 205                 if (
 206                         empty($fields['body']) && empty($fields['file']) &&
 207                         empty($fields['attach']) && empty($fields['edited'])
 208                 ) {
 209                         return $rows;
 210                 }
 211
 212                 Logger::info('Updating per single row method', ['fields' => $fields, 'condition' => $condition]);
 213
 214                 $items = Post::select(['id', 'origin', 'uri-id', 'uid', 'author-network', 'quote-uri-id'], $condition);
 215
 216                 $notify_items = [];
 217
 218                 while ($item = DBA::fetch($items)) {
 219                         if (!empty($fields['body'])) {
 220                                 if (!empty($item['quote-uri-id'])) {
 221                                         $fields['body'] = BBCode::removeSharedData($fields['body']);
 222
 223                                         if (!empty($fields['raw-body'])) {
 224                                                 $fields['raw-body'] = BBCode::removeSharedData($fields['raw-body']);
 225                                         }
 226                                 }
 227
 228                                 $content_fields = ['raw-body' => trim($fields['raw-body'] ?? $fields['body'])];
 229
 230                                 // Remove all media attachments from the body and store them in the post-media table
 231                                 // @todo On shared postings (Diaspora style and commented reshare) don't fetch content from the shared part
 232                                 $content_fields['raw-body'] = Post\Media::insertFromBody($item['uri-id'], $content_fields['raw-body']);
 233                                 $content_fields['raw-body'] = self::setHashtags($content_fields['raw-body']);
 234
 235                                 Post\Media::insertFromRelevantUrl($item['uri-id'], $content_fields['raw-body'], $fields['body'], $item['author-network']);
 236
 237                                 Post\Media::insertFromAttachmentData($item['uri-id'], $fields['body']);
 238                                 $content_fields['raw-body'] = BBCode::removeAttachment($content_fields['raw-body']);
 239
 240                                 Post\Content::update($item['uri-id'], $content_fields);
 241                         }
 242
 243                         if (!empty($fields['file'])) {
 244                                 Post\Category::storeTextByURIId($item['uri-id'], $item['uid'], $fields['file']);
 245                         }
 246
 247                         if (!empty($fields['attach'])) {
 248                                 Post\Media::insertFromAttachment($item['uri-id'], $fields['attach']);
 249                         }
 250
 251                         // We only need to notify others when it is an original entry from us.
 252                         // Only call the notifier when the item had been edited and records had been changed.
 253                         if ($item['origin'] && !empty($fields['edited']) && ($previous['edited'] != $fields['edited'])) {
 254                                 $notify_items[] = $item['id'];
 255                         }
 256                 }
 257
 258                 DBA::close($items);
 259
 260                 foreach ($notify_items as $notify_item) {
 261                         $post = Post::selectFirst([], ['id' => $notify_item]);
 262
 263                         if ($post['gravity'] != self::GRAVITY_PARENT) {
 264                                 $signed = Diaspora::createCommentSignature($post);
 265                                 if (!empty($signed)) {
 266                                         DBA::replace('diaspora-interaction', ['uri-id' => $post['uri-id'], 'interaction' => json_encode($signed)]);
 267                                 }
 268                         }
 269
 270                         Worker::add(Worker::PRIORITY_HIGH, 'Notifier', Delivery::POST, (int)$post['uri-id'], (int)$post['uid']);
 271                 }
 272
 273                 return $rows;
 274         }
 275
 276         /**
 277          * Delete an item and notify others about it - if it was ours
 278          *
 279          * @param array   $condition The condition for finding the item entries
 280          * @param integer $priority  Priority for the notification
 281          * @return void
 282          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 283          */
 284         public static function markForDeletion(array $condition, int $priority = Worker::PRIORITY_HIGH)
 285         {
 286                 $items = Post::select(['id'], $condition);
 287                 while ($item = Post::fetch($items)) {
 288                         self::markForDeletionById($item['id'], $priority);
 289                 }
 290                 DBA::close($items);
 291         }
 292
 293         /**
 294          * Delete an item for an user and notify others about it - if it was ours
 295          *
 296          * @param array   $condition The condition for finding the item entries
 297          * @param integer $uid       User who wants to delete this item
 298          * @return void
 299          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 300          */
 301         public static function deleteForUser(array $condition, int $uid)
 302         {
 303                 if ($uid == 0) {
 304                         return;
 305                 }
 306
 307                 $items = Post::select(['id', 'uid', 'uri-id'], $condition);
 308                 while ($item = Post::fetch($items)) {
 309                         if (in_array($item['uid'], [$uid, 0])) {
 310                                 Post\User::update($item['uri-id'], $uid, ['hidden' => true], true);
 311                                 Post\ThreadUser::update($item['uri-id'], $uid, ['hidden' => true], true);
 312                         }
 313
 314                         if ($item['uid'] == $uid) {
 315                                 self::markForDeletionById($item['id'], Worker::PRIORITY_HIGH);
 316                         } elseif ($item['uid'] != 0) {
 317                                 Logger::warning('Wrong ownership. Not deleting item', ['id' => $item['id']]);
 318                         }
 319                 }
 320                 DBA::close($items);
 321         }
 322
 323         /**
 324          * Mark an item for deletion, delete related data and notify others about it - if it was ours
 325          *
 326          * @param integer $item_id
 327          * @param integer $priority Priority for the notification
 328          * @return boolean success
 329          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 330          */
 331         public static function markForDeletionById(int $item_id, int $priority = Worker::PRIORITY_HIGH): bool
 332         {
 333                 Logger::info('Mark item for deletion by id', ['id' => $item_id]);
 334                 // locate item to be deleted
 335                 $fields = [
 336                         'id', 'uri', 'uri-id', 'uid', 'parent', 'parent-uri-id', 'origin',
 337                         'deleted', 'resource-id', 'event-id',
 338                         'verb', 'object-type', 'object', 'target', 'contact-id', 'psid', 'gravity'
 339                 ];
 340                 $item = Post::selectFirst($fields, ['id' => $item_id]);
 341                 if (!DBA::isResult($item)) {
 342                         Logger::info('Item not found.', ['id' => $item_id]);
 343                         return false;
 344                 }
 345
 346                 if ($item['deleted']) {
 347                         Logger::info('Item has already been marked for deletion.', ['id' => $item_id]);
 348                         return false;
 349                 }
 350
 351                 $parent = Post::selectFirst(['origin'], ['id' => $item['parent']]);
 352                 if (!DBA::isResult($parent)) {
 353                         $parent = ['origin' => false];
 354                 }
 355
 356                 // clean up categories and tags so they don't end up as orphans
 357                 Post\Category::deleteByURIId($item['uri-id'], $item['uid']);
 358
 359                 /*
 360                  * If item is a link to a photo resource, nuke all the associated photos
 361                  * (visitors will not have photo resources)
 362                  * This only applies to photos uploaded from the photos page. Photos inserted into a post do not
 363                  * generate a resource-id and therefore aren't intimately linked to the item.
 364                  */
 365                 /// @TODO: this should first check if photo is used elsewhere
 366                 if ($item['resource-id']) {
 367                         Photo::delete(['resource-id' => $item['resource-id'], 'uid' => $item['uid']]);
 368                 }
 369
 370                 // If item is a link to an event, delete the event.
 371                 if (intval($item['event-id'])) {
 372                         Event::delete($item['event-id']);
 373                 }
 374
 375                 // If item has attachments, drop them
 376                 $attachments = Post\Media::getByURIId($item['uri-id'], [Post\Media::DOCUMENT]);
 377                 foreach ($attachments as $attachment) {
 378                         if (preg_match('|attach/(\d+)|', $attachment['url'], $matches)) {
 379                                 Attach::delete(['id' => $matches[1], 'uid' => $item['uid']]);
 380                         }
 381                 }
 382
 383                 // Set the item to "deleted"
 384                 $item_fields = ['deleted' => true, 'edited' => DateTimeFormat::utcNow(), 'changed' => DateTimeFormat::utcNow()];
 385                 Post::update($item_fields, ['id' => $item['id']]);
 386
 387                 Post\Category::storeTextByURIId($item['uri-id'], $item['uid'], '');
 388
 389                 if (!Post::exists(["`uri-id` = ? AND `uid` != 0 AND NOT `deleted`", $item['uri-id']])) {
 390                         self::markForDeletion(['uri-id' => $item['uri-id'], 'uid' => 0, 'deleted' => false], $priority);
 391                 }
 392
 393                 Post\DeliveryData::delete($item['uri-id']);
 394
 395                 // If it's the parent of a comment thread, kill all the kids
 396                 if ($item['gravity'] == self::GRAVITY_PARENT) {
 397                         self::markForDeletion(['parent' => $item['parent'], 'deleted' => false], $priority);
 398                 }
 399
 400                 // Is it our comment and/or our thread?
 401                 if (($item['origin'] || $parent['origin']) && ($item['uid'] != 0)) {
 402                         // When we delete the original post we will delete all existing copies on the server as well
 403                         self::markForDeletion(['uri-id' => $item['uri-id'], 'deleted' => false], $priority);
 404
 405                         // send the notification upstream/downstream
 406                         if ($priority) {
 407                                 Worker::add(['priority' => $priority, 'dont_fork' => true], 'Notifier', Delivery::DELETION, (int)$item['uri-id'], (int)$item['uid']);
 408                         }
 409                 } elseif ($item['uid'] != 0) {
 410                         Post\User::update($item['uri-id'], $item['uid'], ['hidden' => true]);
 411                         Post\ThreadUser::update($item['uri-id'], $item['uid'], ['hidden' => true]);
 412                 }
 413
 414                 DI::notify()->deleteForItem($item['uri-id']);
 415                 DI::notification()->deleteForItem($item['uri-id']);
 416
 417                 Logger::info('Item has been marked for deletion.', ['id' => $item_id]);
 418
 419                 return true;
 420         }
 421
 422         /**
 423          * Get guid from given item record
 424          *
 425          * @param array $item Item record
 426          * @param bool Whether to notify (?)
 427          * @return string Guid
 428          */
 429         public static function guid(array $item, bool $notify): string
 430         {
 431                 if (!empty($item['guid'])) {
 432                         return trim($item['guid']);
 433                 }
 434
 435                 if ($notify) {
 436                         // We have to avoid duplicates. So we create the GUID in form of a hash of the plink or uri.
 437                         // We add the hash of our own host because our host is the original creator of the post.
 438                         $prefix_host = DI::baseUrl()->getHost();
 439                 } else {
 440                         $prefix_host = '';
 441
 442                         // We are only storing the post so we create a GUID from the original hostname.
 443                         if (!empty($item['author-link'])) {
 444                                 $parsed = parse_url($item['author-link']);
 445                                 if (!empty($parsed['host'])) {
 446                                         $prefix_host = $parsed['host'];
 447                                 }
 448                         }
 449
 450                         if (empty($prefix_host) && !empty($item['plink'])) {
 451                                 $parsed = parse_url($item['plink']);
 452                                 if (!empty($parsed['host'])) {
 453                                         $prefix_host = $parsed['host'];
 454                                 }
 455                         }
 456
 457                         if (empty($prefix_host) && !empty($item['uri'])) {
 458                                 $parsed = parse_url($item['uri']);
 459                                 if (!empty($parsed['host'])) {
 460                                         $prefix_host = $parsed['host'];
 461                                 }
 462                         }
 463
 464                         // Is it in the format data@host.tld? - Used for mail contacts
 465                         if (empty($prefix_host) && !empty($item['author-link']) && strstr($item['author-link'], '@')) {
 466                                 $mailparts = explode('@', $item['author-link']);
 467                                 $prefix_host = array_pop($mailparts);
 468                         }
 469                 }
 470
 471                 if (!empty($item['plink'])) {
 472                         $guid = self::guidFromUri($item['plink'], $prefix_host);
 473                 } elseif (!empty($item['uri'])) {
 474                         $guid = self::guidFromUri($item['uri'], $prefix_host);
 475                 } else {
 476                         $guid = System::createUUID(hash('crc32', $prefix_host));
 477                 }
 478
 479                 return $guid;
 480         }
 481
 482         /**
 483          * Returns contact id from given item record
 484          *
 485          * @param array $item Item record
 486          * @return int Contact id
 487          */
 488         private static function contactId(array $item): int
 489         {
 490                 if ($item['uid'] == 0) {
 491                         return $item['owner-id'];
 492                 }
 493
 494                 if ($item['origin']) {
 495                         $owner = User::getOwnerDataById($item['uid']);
 496                         return $owner['id'];
 497                 }
 498
 499                 $contact_id      = 0;
 500                 $user_contact_id = 0;
 501                 foreach (['group-link', 'causer-link', 'owner-link', 'author-link'] as $field) {
 502                         if (empty($item[$field])) {
 503                                 continue;
 504                         }
 505                         if (!$user_contact_id && Contact::isSharingByURL($item[$field], $item['uid'], true)) {
 506                                 $user_contact_id = Contact::getIdForURL($item[$field], $item['uid']);
 507                         } elseif (!$contact_id) {
 508                                 $contact_id = Contact::getIdForURL($item[$field]);
 509                         }
 510                 }
 511
 512                 if ($user_contact_id) {
 513                         return $user_contact_id;
 514                 }
 515
 516                 if (!empty($item['causer-id']) && Contact::isSharing($item['causer-id'], $item['uid'], true)) {
 517                         $cdata = Contact::getPublicAndUserContactID($item['causer-id'], $item['uid']);
 518                         if (!empty($cdata['user'])) {
 519                                 return $cdata['user'];
 520                         }
 521                 }
 522
 523                 if ($contact_id) {
 524                         return $contact_id;
 525                 }
 526
 527                 Logger::warning('contact-id could not be fetched, using self contact instead.', ['uid' => $item['uid'], 'item' => $item]);
 528                 $self = Contact::selectFirst(['id'], ['self' => true, 'uid' => $item['uid']]);
 529                 return $self['id'];
 530         }
 531
 532         /**
 533          * Write an item array into a spool file to be inserted later.
 534          * This command is called whenever there are issues storing an item.
 535          *
 536          * @param array $item The item fields that are to be inserted
 537          * @throws \Exception
 538          */
 539         private static function spool(array $item)
 540         {
 541                 // Now we store the data in the spool directory
 542                 // We use "microtime" to keep the arrival order and "mt_rand" to avoid duplicates
 543                 $file = 'item-' . round(microtime(true) * 10000) . '-' . mt_rand() . '.msg';
 544
 545                 $spoolpath = System::getSpoolPath();
 546                 if ($spoolpath != '') {
 547                         $spool = $spoolpath . '/' . $file;
 548
 549                         file_put_contents($spool, json_encode($item));
 550                         Logger::warning("Item wasn't stored - Item was spooled into file", ['file' => $file]);
 551                 }
 552         }
 553
 554         /**
 555          * Check if the item array is a duplicate
 556          *
 557          * @param array $item Item record
 558          * @return boolean is it a duplicate?
 559          */
 560         private static function isDuplicate(array $item): bool
 561         {
 562                 // Checking if there is already an item with the same guid
 563                 $condition = ['guid' => $item['guid'], 'network' => $item['network'], 'uid' => $item['uid']];
 564                 if (Post::exists($condition)) {
 565                         Logger::notice('Found already existing item', $condition);
 566                         return true;
 567                 }
 568
 569                 $condition = [
 570                         'uri-id' => $item['uri-id'], 'uid' => $item['uid'],
 571                         'network' => [$item['network'], Protocol::DFRN]
 572                 ];
 573                 if (Post::exists($condition)) {
 574                         Logger::notice('duplicated item with the same uri found.', $condition);
 575                         return true;
 576                 }
 577
 578                 // On Friendica and Diaspora the GUID is unique
 579                 if (in_array($item['network'], [Protocol::DFRN, Protocol::DIASPORA])) {
 580                         $condition = ['guid' => $item['guid'], 'uid' => $item['uid']];
 581                         if (Post::exists($condition)) {
 582                                 Logger::notice('duplicated item with the same guid found.', $condition);
 583                                 return true;
 584                         }
 585                 } elseif ($item['network'] == Protocol::OSTATUS) {
 586                         // Check for an existing post with the same content. There seems to be a problem with OStatus.
 587                         $condition = [
 588                                 "`body` = ? AND `network` = ? AND `created` = ? AND `contact-id` = ? AND `uid` = ?",
 589                                 $item['body'], $item['network'], $item['created'], $item['contact-id'], $item['uid']
 590                         ];
 591                         if (Post::exists($condition)) {
 592                                 Logger::notice('duplicated item with the same body found.', $item);
 593                                 return true;
 594                         }
 595                 }
 596
 597                 /*
 598                  * Check for already added items.
 599                  * There is a timing issue here that sometimes creates double postings.
 600                  * An unique index would help - but the limitations of MySQL (maximum size of index values) prevent this.
 601                  */
 602                 if (($item['uid'] == 0) && Post::exists(['uri-id' => $item['uri-id'], 'uid' => 0])) {
 603                         Logger::notice('Global item already stored.', ['uri-id' => $item['uri-id'], 'network' => $item['network']]);
 604                         return true;
 605                 }
 606
 607                 return false;
 608         }
 609
 610         /**
 611          * Check if the item array is valid
 612          *
 613          * @param array $item Item record
 614          * @return boolean item is valid
 615          */
 616         public static function isValid(array $item): bool
 617         {
 618                 // When there is no content then we don't post it
 619                 if (($item['body'] . $item['title'] == '') && empty($item['quote-uri-id']) && empty($item['attachments']) && (empty($item['uri-id']) || !Post\Media::existsByURIId($item['uri-id']))) {
 620                         Logger::notice('No body, no title.');
 621                         return false;
 622                 }
 623
 624                 if (!empty($item['uid'])) {
 625                         $owner = User::getOwnerDataById($item['uid'], false);
 626                         if (!$owner) {
 627                                 Logger::warning('Missing item user owner data', ['uid' => $item['uid']]);
 628                                 return false;
 629                         }
 630
 631                         if ($owner['account_expired'] || $owner['account_removed']) {
 632                                 Logger::notice('Item user has been deleted/expired/removed', ['uid' => $item['uid'], 'deleted' => $owner['deleted'], 'account_expired' => $owner['account_expired'], 'account_removed' => $owner['account_removed']]);
 633                                 return false;
 634                         }
 635                 }
 636
 637                 if (!empty($item['author-id']) && Contact::isBlocked($item['author-id'])) {
 638                         Logger::notice('Author is blocked node-wide', ['author-link' => $item['author-link'], 'item-uri' => $item['uri']]);
 639                         return false;
 640                 }
 641
 642                 if (!empty($item['author-link']) && Network::isUrlBlocked($item['author-link'])) {
 643                         Logger::notice('Author server is blocked', ['author-link' => $item['author-link'], 'item-uri' => $item['uri']]);
 644                         return false;
 645                 }
 646
 647                 if (!empty($item['owner-id']) && Contact::isBlocked($item['owner-id'])) {
 648                         Logger::notice('Owner is blocked node-wide', ['owner-link' => $item['owner-link'], 'item-uri' => $item['uri']]);
 649                         return false;
 650                 }
 651
 652                 if (!empty($item['owner-link']) && Network::isUrlBlocked($item['owner-link'])) {
 653                         Logger::notice('Owner server is blocked', ['owner-link' => $item['owner-link'], 'item-uri' => $item['uri']]);
 654                         return false;
 655                 }
 656
 657                 if ($item['verb'] == Activity::FOLLOW) {
 658                         if (!$item['origin'] && ($item['author-id'] == Contact::getPublicIdByUserId($item['uid']))) {
 659                                 // Our own follow request can be relayed to us. We don't store it to avoid notification chaos.
 660                                 Logger::info("Follow: Don't store not origin follow request", ['parent-uri' => $item['parent-uri']]);
 661                                 return false;
 662                         }
 663
 664                         $condition = [
 665                                 'verb' => Activity::FOLLOW, 'uid' => $item['uid'],
 666                                 'parent-uri' => $item['parent-uri'], 'author-id' => $item['author-id']
 667                         ];
 668                         if (Post::exists($condition)) {
 669                                 // It happens that we receive multiple follow requests by the same author - we only store one.
 670                                 Logger::info('Follow: Found existing follow request from author', ['author-id' => $item['author-id'], 'parent-uri' => $item['parent-uri']]);
 671                                 return false;
 672                         }
 673                 }
 674
 675                 return true;
 676         }
 677
 678         /**
 679          * Check if the item array is too old
 680          *
 681          * @param array $item Item record
 682          * @return boolean item is too old
 683          */
 684         public static function isTooOld(array $item): bool
 685         {
 686                 // check for create date and expire time
 687                 $expire_interval = DI::config()->get('system', 'dbclean-expire-days', 0);
 688
 689                 $user = DBA::selectFirst('user', ['expire'], ['uid' => $item['uid']]);
 690                 if (DBA::isResult($user) && ($user['expire'] > 0) && (($user['expire'] < $expire_interval) || ($expire_interval == 0))) {
 691                         $expire_interval = $user['expire'];
 692                 }
 693
 694                 if (($expire_interval > 0) && !empty($item['created'])) {
 695                         $expire_date = time() - ($expire_interval * 86400);
 696                         $created_date = strtotime($item['created']);
 697                         if ($created_date < $expire_date) {
 698                                 Logger::notice('Item created before expiration interval.', [
 699                                         'created' => date('c', $created_date),
 700                                         'expired' => date('c', $expire_date),
 701                                         '$item' => $item
 702                                 ]);
 703                                 return true;
 704                         }
 705                 }
 706
 707                 return false;
 708         }
 709
 710         /**
 711          * Return the id of the given item array if it has been stored before
 712          *
 713          * @param array $item Item record
 714          * @return integer Item id or zero on error
 715          */
 716         private static function getDuplicateID(array $item): int
 717         {
 718                 if (empty($item['network']) || in_array($item['network'], Protocol::FEDERATED)) {
 719                         $condition = [
 720                                 '`uri-id` = ? AND `uid` = ? AND `network` IN (?, ?, ?, ?)',
 721                                 $item['uri-id'],
 722                                 $item['uid'],
 723                                 Protocol::ACTIVITYPUB,
 724                                 Protocol::DIASPORA,
 725                                 Protocol::DFRN,
 726                                 Protocol::OSTATUS
 727                         ];
 728                         $existing = Post::selectFirst(['id', 'network'], $condition);
 729                         if (DBA::isResult($existing)) {
 730                                 // We only log the entries with a different user id than 0. Otherwise we would have too many false positives
 731                                 if ($item['uid'] != 0) {
 732                                         Logger::notice('Item already existed for user', [
 733                                                 'uri-id' => $item['uri-id'],
 734                                                 'uid' => $item['uid'],
 735                                                 'network' => $item['network'],
 736                                                 'existing_id' => $existing['id'],
 737                                                 'existing_network' => $existing['network']
 738                                         ]);
 739                                 }
 740
 741                                 return $existing['id'];
 742                         }
 743                 }
 744                 return 0;
 745         }
 746
 747         /**
 748          * Fetch the uri-id of the parent for the given uri-id
 749          *
 750          * @param integer $uriid
 751          * @return integer
 752          */
 753         public static function getParent(int $uriid): int
 754         {
 755                 $thread_parent = Post::selectFirstPost(['thr-parent-id', 'gravity'], ['uri-id' => $uriid]);
 756                 if (empty($thread_parent)) {
 757                         return 0;
 758                 }
 759
 760                 if ($thread_parent['gravity'] == Item::GRAVITY_PARENT) {
 761                         return $uriid;
 762                 }
 763
 764                 return self::getParent($thread_parent['thr-parent-id']);
 765         }
 766
 767         /**
 768          * Fetch top-level parent data for the given item array
 769          *
 770          * @param array $item
 771          * @return array item array with parent data
 772          * @throws \Exception
 773          */
 774         private static function getTopLevelParent(array $item): array
 775         {
 776                 $fields = [
 777                         'uid', 'uri', 'parent-uri', 'id', 'deleted',
 778                         'uri-id', 'parent-uri-id',
 779                         'allow_cid', 'allow_gid', 'deny_cid', 'deny_gid',
 780                         'wall', 'private', 'origin', 'author-id'
 781                 ];
 782                 $condition = ['uri-id' => [$item['thr-parent-id'], $item['parent-uri-id']], 'uid' => $item['uid']];
 783                 $params = ['order' => ['id' => false]];
 784                 $parent = Post::selectFirst($fields, $condition, $params);
 785
 786                 if (!DBA::isResult($parent) && Post::exists(['uri-id' => [$item['thr-parent-id'], $item['parent-uri-id']], 'uid' => 0])) {
 787                         $stored = Item::storeForUserByUriId($item['thr-parent-id'], $item['uid'], ['post-reason' => Item::PR_COMPLETION]);
 788                         if (!$stored && ($item['thr-parent-id'] != $item['parent-uri-id'])) {
 789                                 $stored = Item::storeForUserByUriId($item['parent-uri-id'], $item['uid'], ['post-reason' => Item::PR_COMPLETION]);
 790                         }
 791                         if ($stored) {
 792                                 Logger::info('Stored thread parent item for user', ['uri-id' => $item['thr-parent-id'], 'uid' => $item['uid'], 'stored' => $stored]);
 793                                 $parent = Post::selectFirst($fields, $condition, $params);
 794                         }
 795                 }
 796
 797                 if (!DBA::isResult($parent)) {
 798                         Logger::notice('item parent was not found - ignoring item', ['uri-id' => $item['uri-id'], 'thr-parent-id' => $item['thr-parent-id'], 'uid' => $item['uid']]);
 799                         return [];
 800                 }
 801
 802                 if ($parent['uri-id'] == $parent['parent-uri-id']) {
 803                         return $parent;
 804                 }
 805
 806                 $condition = [
 807                         'uri-id' => $parent['parent-uri-id'],
 808                         'parent-uri-id' => $parent['parent-uri-id'],
 809                         'uid' => $parent['uid']
 810                 ];
 811                 $params = ['order' => ['id' => false]];
 812                 $toplevel_parent = Post::selectFirst($fields, $condition, $params);
 813
 814                 if (!DBA::isResult($toplevel_parent) && $item['origin']) {
 815                         $stored = Item::storeForUserByUriId($item['parent-uri-id'], $item['uid'], ['post-reason' => Item::PR_COMPLETION]);
 816                         Logger::info('Stored parent item for user', ['uri-id' => $item['parent-uri-id'], 'uid' => $item['uid'], 'stored' => $stored]);
 817                         $toplevel_parent = Post::selectFirst($fields, $condition, $params);
 818                 }
 819
 820                 if (!DBA::isResult($toplevel_parent)) {
 821                         Logger::notice('item top level parent was not found - ignoring item', ['parent-uri-id' => $parent['parent-uri-id'], 'uid' => $parent['uid']]);
 822                         return [];
 823                 }
 824
 825                 return $toplevel_parent;
 826         }
 827
 828         /**
 829          * Get the gravity for the given item array
 830          *
 831          * @param array $item
 832          * @return integer gravity
 833          */
 834         private static function getGravity(array $item): int
 835         {
 836                 $activity = DI::activity();
 837
 838                 if (isset($item['gravity'])) {
 839                         return intval($item['gravity']);
 840                 } elseif ($item['parent-uri-id'] === $item['uri-id']) {
 841                         return self::GRAVITY_PARENT;
 842                 } elseif ($activity->match($item['verb'], Activity::POST)) {
 843                         return self::GRAVITY_COMMENT;
 844                 } elseif ($activity->match($item['verb'], Activity::FOLLOW)) {
 845                         return self::GRAVITY_ACTIVITY;
 846                 } elseif ($activity->match($item['verb'], Activity::ANNOUNCE)) {
 847                         return self::GRAVITY_ACTIVITY;
 848                 }
 849
 850                 Logger::info('Unknown gravity for verb', ['verb' => $item['verb']]);
 851                 return self::GRAVITY_UNKNOWN;   // Should not happen
 852         }
 853
 854         private static function prepareOriginPost(array $item): array
 855         {
 856                 $item = DI::contentItem()->initializePost($item);
 857                 $item = DI::contentItem()->finalizePost($item);
 858
 859                 return $item;
 860         }
 861
 862         /**
 863          * Inserts item record
 864          *
 865          * @param array $item Item array to be inserted
 866          * @param int   $notify Notification (type?)
 867          * @param bool  $post_local (???)
 868          * @return int Zero means error, otherwise primary key (id) is being returned
 869          */
 870         public static function insert(array $item, int $notify = 0, bool $post_local = true): int
 871         {
 872                 $orig_item = $item;
 873
 874                 $priority = Worker::PRIORITY_HIGH;
 875
 876                 // If it is a posting where users should get notifications, then define it as wall posting
 877                 if ($notify) {
 878                         $item = self::prepareOriginPost($item);
 879
 880                         if (is_int($notify) && in_array($notify, Worker::PRIORITIES)) {
 881                                 $priority = $notify;
 882                         }
 883
 884                         // Mastodon style API visibility
 885                         $copy_permissions = ($item['visibility'] ?? 'private') == 'private';
 886                         unset($item['visibility']);
 887                 } else {
 888                         $item['network'] = trim(($item['network'] ?? '') ?: Protocol::PHANTOM);
 889                 }
 890
 891                 $uid = intval($item['uid']);
 892
 893                 $item['guid'] = self::guid($item, $notify);
 894                 $item['uri'] = substr(trim($item['uri'] ?? '') ?: self::newURI($item['guid']), 0, 255);
 895
 896                 // Store URI data
 897                 $item['uri-id'] = ItemURI::insert(['uri' => $item['uri'], 'guid' => $item['guid']]);
 898
 899                 // Backward compatibility: parent-uri used to be the direct parent uri.
 900                 // If it is provided without a thr-parent, it probably is the old behavior.
 901                 if (empty($item['thr-parent']) || empty($item['parent-uri'])) {
 902                         $item['thr-parent'] = trim($item['thr-parent'] ?? $item['parent-uri'] ?? $item['uri']);
 903                         $item['parent-uri'] = $item['thr-parent'];
 904                 }
 905
 906                 $item['thr-parent-id'] = ItemURI::getIdByURI($item['thr-parent']);
 907                 $item['parent-uri-id'] = ItemURI::getIdByURI($item['parent-uri']);
 908
 909                 // Store conversation data
 910                 $source = $item['source'] ?? '';
 911                 unset($item['conversation-uri']);
 912                 unset($item['conversation-href']);
 913                 unset($item['source']);
 914
 915                 /*
 916                  * Do we already have this item?
 917                  * We have to check several networks since Friendica posts could be repeated
 918                  * via OStatus (maybe Diaspora as well)
 919                  */
 920                 $duplicate = self::getDuplicateID($item);
 921                 if ($duplicate) {
 922                         return $duplicate;
 923                 }
 924
 925                 // Additional duplicate checks
 926                 /// @todo Check why the first duplication check returns the item number and the second a 0
 927                 if (self::isDuplicate($item)) {
 928                         return 0;
 929                 }
 930
 931                 if (!isset($item['post-type'])) {
 932                         $item['post-type'] = empty($item['title']) ? self::PT_NOTE : self::PT_ARTICLE;
 933                 }
 934
 935                 $defined_permissions = isset($item['allow_cid']) && isset($item['allow_gid']) && isset($item['deny_cid']) && isset($item['deny_gid']) && isset($item['private']);
 936
 937                 $item['wall']          = intval($item['wall'] ?? 0);
 938                 $item['extid']         = trim($item['extid'] ?? '');
 939                 $item['author-name']   = trim($item['author-name'] ?? '');
 940                 $item['author-link']   = trim($item['author-link'] ?? '');
 941                 $item['author-avatar'] = trim($item['author-avatar'] ?? '');
 942                 $item['owner-name']    = trim($item['owner-name'] ?? '');
 943                 $item['owner-link']    = trim($item['owner-link'] ?? '');
 944                 $item['owner-avatar']  = trim($item['owner-avatar'] ?? '');
 945                 $item['received']      = (isset($item['received'])  ? DateTimeFormat::utc($item['received'])  : DateTimeFormat::utcNow());
 946                 $item['created']       = (isset($item['created'])   ? DateTimeFormat::utc($item['created'])   : $item['received']);
 947                 $item['edited']        = (isset($item['edited'])    ? DateTimeFormat::utc($item['edited'])    : $item['created']);
 948                 $item['changed']       = (isset($item['changed'])   ? DateTimeFormat::utc($item['changed'])   : $item['created']);
 949                 $item['commented']     = (isset($item['commented']) ? DateTimeFormat::utc($item['commented']) : $item['created']);
 950                 $item['title']         = substr(trim($item['title'] ?? ''), 0, 255);
 951                 $item['location']      = trim($item['location'] ?? '');
 952                 $item['coord']         = trim($item['coord'] ?? '');
 953                 $item['visible']       = (isset($item['visible']) ? intval($item['visible']) : 1);
 954                 $item['deleted']       = 0;
 955                 $item['verb']          = trim($item['verb'] ?? '');
 956                 $item['object-type']   = trim($item['object-type'] ?? '');
 957                 $item['object']        = trim($item['object'] ?? '');
 958                 $item['target-type']   = trim($item['target-type'] ?? '');
 959                 $item['target']        = trim($item['target'] ?? '');
 960                 $item['plink']         = substr(trim($item['plink'] ?? ''), 0, 255);
 961                 $item['allow_cid']     = trim($item['allow_cid'] ?? '');
 962                 $item['allow_gid']     = trim($item['allow_gid'] ?? '');
 963                 $item['deny_cid']      = trim($item['deny_cid'] ?? '');
 964                 $item['deny_gid']      = trim($item['deny_gid'] ?? '');
 965                 $item['private']       = intval($item['private'] ?? self::PUBLIC);
 966                 $item['body']          = trim($item['body'] ?? '');
 967                 $item['raw-body']      = trim($item['raw-body'] ?? $item['body']);
 968                 $item['app']           = trim($item['app'] ?? '');
 969                 $item['origin']        = intval($item['origin'] ?? 0);
 970                 $item['postopts']      = trim($item['postopts'] ?? '');
 971                 $item['resource-id']   = trim($item['resource-id'] ?? '');
 972                 $item['event-id']      = intval($item['event-id'] ?? 0);
 973                 $item['inform']        = trim($item['inform'] ?? '');
 974                 $item['file']          = trim($item['file'] ?? '');
 975
 976                 // Communities aren't working with the Diaspora protocol
 977                 if (($uid != 0) && ($item['network'] == Protocol::DIASPORA)) {
 978                         $user = User::getById($uid, ['account-type']);
 979                         if ($user['account-type'] == Contact::TYPE_COMMUNITY) {
 980                                 Logger::info('Community posts are not supported via Diaspora');
 981                                 return 0;
 982                         }
 983                 }
 984
 985                 // Items cannot be stored before they happen ...
 986                 if ($item['created'] > DateTimeFormat::utcNow()) {
 987                         $item['created'] = DateTimeFormat::utcNow();
 988                 }
 989
 990                 // We haven't invented time travel by now.
 991                 if ($item['edited'] > DateTimeFormat::utcNow()) {
 992                         $item['edited'] = DateTimeFormat::utcNow();
 993                 }
 994
 995                 $item['plink'] = ($item['plink'] ?? '') ?: DI::baseUrl() . '/display/' . urlencode($item['guid']);
 996
 997                 $item['gravity'] = self::getGravity($item);
 998
 999                 $default = [
1000                         'url' => $item['author-link'], 'name' => $item['author-name'],
1001                         'photo' => $item['author-avatar'], 'network' => $item['network']
1002                 ];
1003                 $item['author-id'] = ($item['author-id'] ?? 0) ?: Contact::getIdForURL($item['author-link'], 0, null, $default);
1004
1005                 $default = [
1006                         'url' => $item['owner-link'], 'name' => $item['owner-name'],
1007                         'photo' => $item['owner-avatar'], 'network' => $item['network']
1008                 ];
1009                 $item['owner-id'] = ($item['owner-id'] ?? 0) ?: Contact::getIdForURL($item['owner-link'], 0, null, $default);
1010
1011                 $item['post-reason'] = self::getPostReason($item);
1012
1013                 // Ensure that there is an avatar cache
1014                 Contact::checkAvatarCache($item['author-id']);
1015                 Contact::checkAvatarCache($item['owner-id']);
1016
1017                 $item['contact-id'] = self::contactId($item);
1018
1019                 if (
1020                         !empty($item['direction']) && in_array($item['direction'], [Conversation::PUSH, Conversation::RELAY]) &&
1021                         empty($item['origin']) && self::isTooOld($item)
1022                 ) {
1023                         Logger::info('Item is too old', ['item' => $item]);
1024                         return 0;
1025                 }
1026
1027                 if (!self::isValid($item)) {
1028                         return 0;
1029                 }
1030
1031                 if ($item['gravity'] !== self::GRAVITY_PARENT) {
1032                         $toplevel_parent = self::getTopLevelParent($item);
1033                         if (empty($toplevel_parent)) {
1034                                 return 0;
1035                         }
1036
1037                         $parent_id             = $toplevel_parent['id'];
1038                         $item['parent-uri']    = $toplevel_parent['uri'];
1039                         $item['parent-uri-id'] = $toplevel_parent['uri-id'];
1040                         $item['deleted']       = $toplevel_parent['deleted'];
1041                         $item['wall']          = $toplevel_parent['wall'];
1042
1043                         // Reshares have to keep their permissions to allow groups to work
1044                         if (!$defined_permissions && (!$item['origin'] || ($item['verb'] != Activity::ANNOUNCE))) {
1045                                 $item['allow_cid']     = $toplevel_parent['allow_cid'];
1046                                 $item['allow_gid']     = $toplevel_parent['allow_gid'];
1047                                 $item['deny_cid']      = $toplevel_parent['deny_cid'];
1048                                 $item['deny_gid']      = $toplevel_parent['deny_gid'];
1049                         }
1050
1051                         $parent_origin         = $toplevel_parent['origin'];
1052
1053                         // Don't federate received participation messages
1054                         if ($item['verb'] != Activity::FOLLOW) {
1055                                 $item['wall'] = $toplevel_parent['wall'];
1056                         } else {
1057                                 $item['wall'] = false;
1058                                 // Participations are technical messages, so they are set to "seen" automatically
1059                                 $item['unseen'] = false;
1060                         }
1061
1062                         /*
1063                          * If the parent is private, force privacy for the entire conversation
1064                          * This differs from the above settings as it subtly allows comments from
1065                          * email correspondents to be private even if the overall thread is not.
1066                          */
1067                         if (!$defined_permissions && $toplevel_parent['private']) {
1068                                 $item['private'] = $toplevel_parent['private'];
1069                         }
1070
1071                         // If its a post that originated here then tag the thread as "mention"
1072                         if ($item['origin'] && $item['uid']) {
1073                                 DBA::update('post-thread-user', ['mention' => true], ['uri-id' => $item['parent-uri-id'], 'uid' => $item['uid']]);
1074                                 Logger::info('tagged thread as mention', ['parent' => $parent_id, 'parent-uri-id' => $item['parent-uri-id'], 'uid' => $item['uid']]);
1075                         }
1076
1077                         // Update the contact relations
1078                         Contact\Relation::store($toplevel_parent['author-id'], $item['author-id'], $item['created']);
1079                 } else {
1080                         $parent_id = 0;
1081                         $parent_origin = $item['origin'];
1082
1083                         if ($item['wall'] && empty($item['conversation'])) {
1084                                 $item['conversation'] = $item['parent-uri'] . '#context';
1085                         }
1086                 }
1087
1088                 if ($item['origin']) {
1089                         if (
1090                                 Photo::setPermissionFromBody($item['body'], $item['uid'], $item['contact-id'], $item['allow_cid'], $item['allow_gid'], $item['deny_cid'], $item['deny_gid'])
1091                                 && ($item['object-type'] != Activity\ObjectType::EVENT)
1092                         ) {
1093                                 $item['object-type'] = Activity\ObjectType::IMAGE;
1094                         }
1095
1096                         $item = DI::contentItem()->moveAttachmentsFromBodyToAttach($item);
1097                 }
1098
1099                 $item['parent-uri-id'] = ItemURI::getIdByURI($item['parent-uri']);
1100                 $item['thr-parent-id'] = ItemURI::getIdByURI($item['thr-parent']);
1101
1102                 if (!empty($item['conversation']) && empty($item['conversation-id'])) {
1103                         $item['conversation-id'] = ItemURI::getIdByURI($item['conversation']);
1104                 }
1105
1106                 // Is this item available in the global items (with uid=0)?
1107                 if ($item['uid'] == 0) {
1108                         $item['global'] = true;
1109
1110                         // Set the global flag on all items if this was a global item entry
1111                         Post::update(['global' => true], ['uri-id' => $item['uri-id']]);
1112                 } else {
1113                         $item['global'] = Post::exists(['uid' => 0, 'uri-id' => $item['uri-id']]);
1114                 }
1115
1116                 // ACL settings
1117                 if (!$defined_permissions && !empty($item['allow_cid'] . $item['allow_gid'] . $item['deny_cid'] . $item['deny_gid'])) {
1118                         $item['private'] = self::PRIVATE;
1119                 }
1120
1121                 if ($notify && $post_local) {
1122                         $item['edit'] = false;
1123                         $item['parent'] = $parent_id;
1124
1125                         // Trigger automatic reactions for addons
1126                         if (!isset($item['api_source'])) {
1127                                 $item['api_source'] = true;
1128                         }
1129
1130                         // We have to tell the hooks who we are - this really should be improved
1131                         if (!DI::userSession()->getLocalUserId()) {
1132                                 $_SESSION['authenticated'] = true;
1133                                 $_SESSION['uid'] = $uid;
1134                                 $dummy_session = true;
1135                         } else {
1136                                 $dummy_session = false;
1137                         }
1138
1139                         Hook::callAll('post_local', $item);
1140
1141                         if ($dummy_session) {
1142                                 unset($_SESSION['authenticated']);
1143                                 unset($_SESSION['uid']);
1144                         }
1145                 } elseif (!$notify) {
1146                         Hook::callAll('post_remote', $item);
1147                 }
1148
1149                 if (!empty($item['cancel'])) {
1150                         Logger::notice('post cancelled by addon.');
1151                         return 0;
1152                 }
1153
1154                 if (empty($item['vid']) && !empty($item['verb'])) {
1155                         $item['vid'] = Verb::getID($item['verb']);
1156                 }
1157
1158                 // Creates or assigns the permission set
1159                 $item['psid'] = DI::permissionSet()->selectOrCreate(
1160                         DI::permissionSetFactory()->createFromString(
1161                                 $item['uid'],
1162                                 $item['allow_cid'],
1163                                 $item['allow_gid'],
1164                                 $item['deny_cid'],
1165                                 $item['deny_gid']
1166                         )
1167                 )->id;
1168
1169                 if (!empty($item['extid'])) {
1170                         $item['external-id'] = ItemURI::getIdByURI($item['extid']);
1171                 }
1172
1173                 if ($item['verb'] == Activity::ANNOUNCE) {
1174                         self::setOwnerforResharedItem($item);
1175                 }
1176
1177                 if (isset($item['attachments'])) {
1178                         foreach ($item['attachments'] as $attachment) {
1179                                 $attachment['uri-id'] = $item['uri-id'];
1180                                 Post\Media::insert($attachment);
1181                         }
1182                         unset($item['attachments']);
1183                 }
1184
1185                 if (empty($item['quote-uri-id'])) {
1186                         $quote_id = self::getQuoteUriId($item['body']);
1187                         if (!empty($quote_id)) {
1188                                 // This is one of these "should not happen" situations.
1189                                 // The protocol implementations should already have done this job.
1190                                 Logger::notice('Quote-uri-id detected in post', ['id' => $quote_id, 'guid' => $item['guid'], 'uri-id' => $item['uri-id']]);
1191                                 $item['quote-uri-id'] = $quote_id;
1192                         }
1193                 }
1194
1195                 if (!empty($item['quote-uri-id']) && ($item['quote-uri-id'] == $item['uri-id'])) {
1196                         Logger::info('Quote-Uri-Id is identical to Uri-Id', ['uri-id' => $item['uri-id'], 'guid' => $item['guid']]);
1197                         unset($item['quote-uri-id']);
1198                 }
1199
1200                 if (!empty($item['quote-uri-id'])) {
1201                         $item['raw-body'] = BBCode::removeSharedData($item['raw-body']);
1202                         $item['body']     = BBCode::removeSharedData($item['body']);
1203                 }
1204
1205                 // Remove all media attachments from the body and store them in the post-media table
1206                 $item['raw-body'] = Post\Media::insertFromBody($item['uri-id'], $item['raw-body']);
1207                 $item['raw-body'] = self::setHashtags($item['raw-body']);
1208
1209                 $author = Contact::getById($item['author-id'], ['network']);
1210                 Post\Media::insertFromRelevantUrl($item['uri-id'], $item['raw-body'], $item['body'], $author['network'] ?? '');
1211
1212                 Post\Media::insertFromAttachmentData($item['uri-id'], $item['body']);
1213                 $item['body']     = BBCode::removeAttachment($item['body']);
1214                 $item['raw-body'] = BBCode::removeAttachment($item['raw-body']);
1215
1216                 // Check for hashtags in the body and repair or add hashtag links
1217                 $item['body'] = self::setHashtags($item['body']);
1218
1219                 $notify_type = Delivery::POST;
1220
1221                 // Filling item related side tables
1222                 if (!empty($item['attach'])) {
1223                         Post\Media::insertFromAttachment($item['uri-id'], $item['attach']);
1224                 }
1225
1226                 if (empty($item['event-id'])) {
1227                         unset($item['event-id']);
1228
1229                         $ev = Event::fromBBCode($item['body']);
1230                         if ((!empty($ev['desc']) || !empty($ev['summary'])) && !empty($ev['start'])) {
1231                                 Logger::info('Event found.');
1232                                 $ev['cid']       = $item['contact-id'];
1233                                 $ev['uid']       = $item['uid'];
1234                                 $ev['uri']       = $item['uri'];
1235                                 $ev['edited']    = $item['edited'];
1236                                 $ev['private']   = $item['private'];
1237                                 $ev['guid']      = $item['guid'];
1238                                 $ev['plink']     = $item['plink'];
1239                                 $ev['network']   = $item['network'];
1240                                 $ev['protocol']  = $item['protocol'] ?? Conversation::PARCEL_UNKNOWN;
1241                                 $ev['direction'] = $item['direction'] ?? Conversation::UNKNOWN;
1242                                 $ev['source']    = $item['source'] ?? '';
1243
1244                                 $event = DBA::selectFirst('event', ['id'], ['uri' => $item['uri'], 'uid' => $item['uid']]);
1245                                 if (DBA::isResult($event)) {
1246                                         $ev['id'] = $event['id'];
1247                                 }
1248
1249                                 $event_id = Event::store($ev);
1250                                 $item = Event::getItemArrayForImportedId($event_id, $item);
1251
1252                                 Logger::info('Event was stored', ['id' => $event_id]);
1253                         }
1254                 }
1255
1256                 if (empty($item['causer-id'])) {
1257                         unset($item['causer-id']);
1258                 }
1259
1260                 if (in_array($item['network'], [Protocol::ACTIVITYPUB, Protocol::DFRN])) {
1261                         $content_warning = BBCode::getAbstract($item['body'], Protocol::ACTIVITYPUB);
1262                         if (!empty($content_warning) && empty($item['content-warning'])) {
1263                                 $item['content-warning'] = BBCode::toPlaintext($content_warning);
1264                         }
1265                 }
1266
1267                 $item['language'] = self::getLanguage($item);
1268
1269                 $inserted = Post::insert($item['uri-id'], $item);
1270
1271                 if ($item['gravity'] == self::GRAVITY_PARENT) {
1272                         Post\Thread::insert($item['uri-id'], $item);
1273                 }
1274
1275                 // The content of activities normally doesn't matter - except for likes from Misskey
1276                 if (!in_array($item['verb'], self::ACTIVITIES) || in_array($item['verb'], [Activity::LIKE, Activity::DISLIKE]) && !empty($item['body']) && (mb_strlen($item['body']) == 1)) {
1277                         Post\Content::insert($item['uri-id'], $item);
1278                 }
1279
1280                 $item['parent'] = $parent_id;
1281
1282                 // Create Diaspora signature
1283                 if ($item['origin'] && empty($item['diaspora_signed_text']) && ($item['gravity'] != self::GRAVITY_PARENT)) {
1284                         $signed = Diaspora::createCommentSignature($item);
1285                         if (!empty($signed)) {
1286                                 $item['diaspora_signed_text'] = json_encode($signed);
1287                         }
1288                 }
1289
1290                 if (!empty($item['diaspora_signed_text'])) {
1291                         DBA::replace('diaspora-interaction', ['uri-id' => $item['uri-id'], 'interaction' => $item['diaspora_signed_text']]);
1292                 }
1293
1294                 // Attached file links
1295                 if (!empty($item['file'])) {
1296                         Post\Category::storeTextByURIId($item['uri-id'], $item['uid'], $item['file']);
1297                 }
1298
1299                 // Delivery relevant data
1300                 $delivery_data = Post\DeliveryData::extractFields($item);
1301
1302                 if (!empty($item['origin']) || !empty($item['wall']) || !empty($delivery_data['postopts']) || !empty($delivery_data['inform'])) {
1303                         Post\DeliveryData::insert($item['uri-id'], $delivery_data);
1304                 }
1305
1306                 // Store tags from the body if this hadn't been handled previously in the protocol classes
1307                 if (!Tag::existsForPost($item['uri-id'])) {
1308                         Tag::storeFromBody($item['uri-id'], $item['body']);
1309                 }
1310
1311                 $condition = ['uri-id' => $item['uri-id'], 'uid' => $item['uid']];
1312                 if (Post::exists($condition)) {
1313                         Logger::notice('Item is already inserted - aborting', $condition);
1314                         return 0;
1315                 }
1316
1317                 $post_user_id = Post\User::insert($item['uri-id'], $item['uid'], $item);
1318                 if (!$post_user_id) {
1319                         Logger::notice('Post-User is already inserted - aborting', ['uid' => $item['uid'], 'uri-id' => $item['uri-id']]);
1320                         return 0;
1321                 }
1322
1323                 if ($item['gravity'] == self::GRAVITY_PARENT) {
1324                         $item['post-user-id'] = $post_user_id;
1325                         Post\ThreadUser::insert($item['uri-id'], $item['uid'], $item);
1326                 }
1327
1328                 Logger::notice('created item', ['post-id' => $post_user_id, 'uid' => $item['uid'], 'network' => $item['network'], 'uri-id' => $item['uri-id'], 'guid' => $item['guid']]);
1329
1330                 $posted_item = Post::selectFirst(self::ITEM_FIELDLIST, ['post-user-id' => $post_user_id]);
1331                 if (!DBA::isResult($posted_item)) {
1332                         // On failure store the data into a spool file so that the "SpoolPost" worker can try again later.
1333                         Logger::warning('Could not store item. it will be spooled', ['id' => $post_user_id]);
1334                         self::spool($orig_item);
1335                         return 0;
1336                 }
1337
1338                 // update the commented timestamp on the parent
1339                 if (DI::config()->get('system', 'like_no_comment')) {
1340                         // Update when it is a comment
1341                         $update_commented = in_array($posted_item['gravity'], [self::GRAVITY_PARENT, self::GRAVITY_COMMENT]);
1342                 } else {
1343                         // Update when it isn't a follow or tag verb
1344                         $update_commented = !in_array($posted_item['verb'], [Activity::FOLLOW, Activity::TAG]);
1345                 }
1346
1347                 if ($update_commented) {
1348                         $fields = ['commented' => DateTimeFormat::utcNow(), 'changed' => DateTimeFormat::utcNow()];
1349                 } else {
1350                         $fields = ['changed' => DateTimeFormat::utcNow()];
1351                 }
1352
1353                 Post::update($fields, ['uri-id' => $posted_item['parent-uri-id'], 'uid' => $posted_item['uid']]);
1354
1355                 // In that function we check if this is a group post. Additionally we delete the item under certain circumstances
1356                 if (self::tagDeliver($posted_item['uid'], $post_user_id)) {
1357                         // Get the user information for the logging
1358                         $user = User::getById($uid);
1359
1360                         Logger::notice('Item had been deleted', ['id' => $post_user_id, 'user' => $uid, 'account-type' => $user['account-type']]);
1361                         return 0;
1362                 }
1363
1364                 if ($notify) {
1365                         DI::contentItem()->postProcessPost($posted_item);
1366                         if ($copy_permissions && ($posted_item['thr-parent-id'] != $posted_item['uri-id']) && ($posted_item['private'] == self::PRIVATE)) {
1367                                 DI::contentItem()->copyPermissions($posted_item['thr-parent-id'], $posted_item['uri-id']);
1368                         }
1369                 } else {
1370                         Hook::callAll('post_remote_end', $posted_item);
1371                 }
1372
1373                 if ($posted_item['gravity'] === self::GRAVITY_PARENT) {
1374                         self::addShadow($post_user_id);
1375                 } else {
1376                         self::addShadowPost($post_user_id);
1377                 }
1378
1379                 self::updateContact($posted_item);
1380
1381                 Post\UserNotification::setNotification($posted_item['uri-id'], $posted_item['uid']);
1382
1383                 // Distribute items to users who subscribed to their tags
1384                 self::distributeByTags($posted_item);
1385
1386                 // Automatically reshare the item if the "remote_self" option is selected
1387                 self::autoReshare($posted_item);
1388
1389                 $transmit = $notify || ($posted_item['visible'] && ($parent_origin || $posted_item['origin']));
1390
1391                 if ($transmit) {
1392                         if ($posted_item['uid'] && Contact\User::isBlocked($posted_item['author-id'], $posted_item['uid'])) {
1393                                 Logger::info('Message from blocked author will not be relayed', ['item' => $posted_item['id'], 'uri' => $posted_item['uri'], 'cid' => $posted_item['author-id']]);
1394                                 $transmit = false;
1395                         }
1396                         if ($transmit && $posted_item['uid'] && Contact\User::isBlocked($posted_item['owner-id'], $posted_item['uid'])) {
1397                                 Logger::info('Message from blocked owner will not be relayed', ['item' => $posted_item['id'], 'uri' => $posted_item['uri'], 'cid' => $posted_item['owner-id']]);
1398                                 $transmit = false;
1399                         }
1400                         if ($transmit && !empty($posted_item['causer-id']) && $posted_item['uid'] && Contact\User::isBlocked($posted_item['causer-id'], $posted_item['uid'])) {
1401                                 Logger::info('Message from blocked causer will not be relayed', ['item' => $posted_item['id'], 'uri' => $posted_item['uri'], 'cid' => $posted_item['causer-id']]);
1402                                 $transmit = false;
1403                         }
1404
1405                         // Don't relay participation messages
1406                         if (($posted_item['verb'] == Activity::FOLLOW) &&
1407                                 (!$posted_item['origin'] || ($posted_item['author-id'] != Contact::getPublicIdByUserId($uid)))
1408                         ) {
1409                                 Logger::info('Participation messages will not be relayed', ['item' => $posted_item['id'], 'uri' => $posted_item['uri'], 'verb' => $posted_item['verb']]);
1410                                 $transmit = false;
1411                         }
1412                 }
1413
1414                 if (!empty($source) && ($transmit || DI::config()->get('debug', 'store_source'))) {
1415                         Post\Activity::insert($item['uri-id'], $source);
1416                 }
1417
1418                 if ($transmit) {
1419                         Worker::add(['priority' => $priority, 'dont_fork' => true], 'Notifier', $notify_type, (int)$posted_item['uri-id'], (int)$posted_item['uid']);
1420                 }
1421
1422                 // Fill the cache with the rendered content.
1423                 if (in_array($posted_item['gravity'], [self::GRAVITY_PARENT, self::GRAVITY_COMMENT]) && ($posted_item['uid'] == 0)) {
1424                         self::updateDisplayCache($posted_item['uri-id']);
1425                 }
1426
1427                 if ($inserted) {
1428                         Post\Engagement::storeFromItem($posted_item);
1429                 }
1430
1431                 return $post_user_id;
1432         }
1433
1434         /**
1435          * Fetch the post reason for a given item array
1436          *
1437          * @param array $item
1438          *
1439          * @return integer
1440          */
1441         public static function getPostReason(array $item): int
1442         {
1443                 $actor = ($item['gravity'] == self::GRAVITY_PARENT) ? $item['owner-id'] : $item['author-id'];
1444                 if (empty($item['origin']) && ($item['uid'] != 0) && Contact::isSharing($actor, $item['uid'])) {
1445                         return self::PR_FOLLOWER;
1446                 }
1447
1448                 if (!empty($item['origin']) && empty($item['post-reason'])) {
1449                         return self::PR_LOCAL;
1450                 }
1451
1452                 return $item['post-reason'] ?? self::PR_NONE;
1453         }
1454
1455         /**
1456          * Update the display cache
1457          *
1458          * @param integer $uri_id
1459          * @return void
1460          * @throws InternalServerErrorException
1461          * @throws \ImagickException
1462          */
1463         public static function updateDisplayCache(int $uri_id)
1464         {
1465                 $item = Post::selectFirst(self::DISPLAY_FIELDLIST, ['uri-id' => $uri_id]);
1466                 if (!$item) {
1467                         return;
1468                 }
1469
1470                 self::prepareBody($item, false, false, true);
1471         }
1472
1473         /**
1474          * Change the owner of a parent item if it had been shared by a group
1475          *
1476          * (public) group posts in the new format consist of the regular post by the author
1477          * followed by an announce message sent from the group account.
1478          * Changing the owner helps in grouping group posts.
1479          *
1480          * @param array $item
1481          * @return void
1482          */
1483         private static function setOwnerforResharedItem(array $item)
1484         {
1485                 $parent = Post::selectFirst(
1486                         ['id', 'causer-id', 'owner-id', 'author-id', 'author-link', 'origin', 'post-reason'],
1487                         ['uri-id' => $item['thr-parent-id'], 'uid' => $item['uid']]
1488                 );
1489                 if (!DBA::isResult($parent)) {
1490                         Logger::error('Parent not found', ['uri-id' => $item['thr-parent-id'], 'uid' => $item['uid']]);
1491                         return;
1492                 }
1493
1494                 $author = Contact::selectFirst(['url', 'contact-type', 'network'], ['id' => $item['author-id']]);
1495                 if (!DBA::isResult($author)) {
1496                         Logger::error('Author not found', ['id' => $item['author-id']]);
1497                         return;
1498                 }
1499
1500                 $self_contact = Contact::selectFirst(['id'], ['uid' => $item['uid'], 'self' => true]);
1501                 $self = !empty($self_contact) ? $self_contact['id'] : 0;
1502
1503                 $cid = Contact::getIdForURL($author['url'], $item['uid']);
1504                 if (empty($cid) || (!Contact::isSharing($cid, $item['uid']) && ($cid != $self))) {
1505                         Logger::info('The resharer is not a following contact: quit', ['resharer' => $author['url'], 'uid' => $item['uid'], 'cid' => $cid]);
1506                         return;
1507                 }
1508
1509                 if ($author['contact-type'] != Contact::TYPE_COMMUNITY) {
1510                         if ($parent['post-reason'] == self::PR_ANNOUNCEMENT) {
1511                                 Logger::info('The parent is already marked as announced: quit', ['causer' => $parent['causer-id'], 'owner' => $parent['owner-id'], 'author' => $parent['author-id'], 'uid' => $item['uid']]);
1512                                 return;
1513                         }
1514
1515                         if (Contact::isSharing($parent['owner-id'], $item['uid'])) {
1516                                 Logger::info('The resharer is no group: quit', ['resharer' => $item['author-id'], 'owner' => $parent['owner-id'], 'author' => $parent['author-id'], 'uid' => $item['uid']]);
1517                                 return;
1518                         }
1519                 }
1520
1521                 self::update(['post-reason' => self::PR_ANNOUNCEMENT, 'causer-id' => $item['author-id']], ['id' => $parent['id']]);
1522                 Logger::info('Set announcement post-reason', ['uri-id' => $item['uri-id'], 'thr-parent-id' => $item['thr-parent-id'], 'uid' => $item['uid']]);
1523         }
1524
1525         /**
1526          * Distribute the given item to users who subscribed to their tags
1527          *
1528          * @param array $item     Processed item
1529          */
1530         private static function distributeByTags(array $item)
1531         {
1532                 if (($item['uid'] != 0) || ($item['gravity'] != self::GRAVITY_PARENT) || !in_array($item['network'], Protocol::FEDERATED)) {
1533                         return;
1534                 }
1535
1536                 foreach (Tag::getUIDListByURIId($item['uri-id']) as $uid => $tags) {
1537                         $stored = self::storeForUserByUriId($item['uri-id'], $uid, ['post-reason' => self::PR_TAG]);
1538                         Logger::info('Stored item for users', ['uri-id' => $item['uri-id'], 'uid' => $uid, 'stored' => $stored]);
1539                         foreach ($tags as $tag) {
1540                                 $stored = Category::storeFileByURIId($item['uri-id'], $uid, Category::SUBCRIPTION, $tag);
1541                                 Logger::debug('Stored tag subscription for user', ['uri-id' => $item['uri-id'], 'uid' => $uid, $tag, 'stored' => $stored]);
1542                         }
1543                 }
1544         }
1545
1546         /**
1547          * Distributes public items to the receivers
1548          *
1549          * @param integer $itemid      Item ID that should be added
1550          * @param string  $signed_text Original text (for Diaspora signatures), JSON encoded.
1551          * @throws \Exception
1552          */
1553         public static function distribute(int $itemid, string $signed_text = '')
1554         {
1555                 $condition = ["`id` IN (SELECT `parent` FROM `post-user-view` WHERE `id` = ?)", $itemid];
1556                 $parent = Post::selectFirst(['owner-id'], $condition);
1557                 if (!DBA::isResult($parent)) {
1558                         Logger::warning('Item not found', ['condition' => $condition]);
1559                         return;
1560                 }
1561
1562                 // Only distribute public items from native networks
1563                 $condition = [
1564                         'id' => $itemid, 'uid' => 0,
1565                         'network' => array_merge(Protocol::FEDERATED, ['']),
1566                         'visible' => true, 'deleted' => false, 'private' => [self::PUBLIC, self::UNLISTED]
1567                 ];
1568                 $item = Post::selectFirst(array_merge(self::ITEM_FIELDLIST, ['protocol']), $condition);
1569                 if (!DBA::isResult($item)) {
1570                         Logger::warning('Item not found', ['condition' => $condition]);
1571                         return;
1572                 }
1573
1574                 $origin = $item['origin'];
1575
1576                 $users = [];
1577
1578                 /// @todo add a field "pcid" in the contact table that refers to the public contact id.
1579                 $owner = DBA::selectFirst('contact', ['url', 'nurl', 'alias'], ['id' => $parent['owner-id']]);
1580                 if (!DBA::isResult($owner)) {
1581                         return;
1582                 }
1583
1584                 $condition = ['nurl' => $owner['nurl'], 'rel' => [Contact::SHARING, Contact::FRIEND]];
1585                 $contacts = DBA::select('contact', ['uid'], $condition);
1586                 while ($contact = DBA::fetch($contacts)) {
1587                         if ($contact['uid'] == 0) {
1588                                 continue;
1589                         }
1590
1591                         $users[$contact['uid']] = $contact['uid'];
1592                 }
1593                 DBA::close($contacts);
1594
1595                 $condition = ['alias' => $owner['url'], 'rel' => [Contact::SHARING, Contact::FRIEND]];
1596                 $contacts = DBA::select('contact', ['uid'], $condition);
1597                 while ($contact = DBA::fetch($contacts)) {
1598                         if ($contact['uid'] == 0) {
1599                                 continue;
1600                         }
1601
1602                         $users[$contact['uid']] = $contact['uid'];
1603                 }
1604                 DBA::close($contacts);
1605
1606                 if (!empty($owner['alias'])) {
1607                         $condition = ['nurl' => Strings::normaliseLink($owner['alias']), 'rel' => [Contact::SHARING, Contact::FRIEND]];
1608                         $contacts = DBA::select('contact', ['uid'], $condition);
1609                         while ($contact = DBA::fetch($contacts)) {
1610                                 if ($contact['uid'] == 0) {
1611                                         continue;
1612                                 }
1613
1614                                 $users[$contact['uid']] = $contact['uid'];
1615                         }
1616                         DBA::close($contacts);
1617                 }
1618
1619                 $origin_uid = 0;
1620
1621                 if ($item['uri-id'] != $item['parent-uri-id']) {
1622                         $parents = Post::select(['uid', 'origin'], ["`uri-id` = ? AND `uid` != 0", $item['parent-uri-id']]);
1623                         while ($parent = Post::fetch($parents)) {
1624                                 $users[$parent['uid']] = $parent['uid'];
1625                                 if ($parent['origin'] && !$origin) {
1626                                         $origin_uid = $parent['uid'];
1627                                 }
1628                         }
1629                         DBA::close($parents);
1630                 }
1631
1632                 foreach ($users as $uid) {
1633                         if ($origin_uid == $uid) {
1634                                 $item['diaspora_signed_text'] = $signed_text;
1635                         }
1636                         $item['post-reason'] = self::PR_DISTRIBUTE;
1637                         self::storeForUser($item, $uid);
1638                 }
1639         }
1640
1641         /**
1642          * Store a public item defined by their URI-ID for the given users
1643          *
1644          * @param integer $uri_id     URI-ID of the given item
1645          * @param integer $uid        The user that will receive the item entry
1646          * @param array   $fields     Additional fields to be stored
1647          * @param integer $source_uid User id of the source post
1648          * @return integer stored item id
1649          */
1650         public static function storeForUserByUriId(int $uri_id, int $uid, array $fields = [], int $source_uid = 0): int
1651         {
1652                 if ($uid == $source_uid) {
1653                         Logger::warning('target UID must not be be equal to the source UID', ['uri-id' => $uri_id, 'uid' => $uid]);
1654                         return 0;
1655                 }
1656
1657                 $item = Post::selectFirst(array_merge(self::ITEM_FIELDLIST, ['protocol']), ['uri-id' => $uri_id, 'uid' => $source_uid]);
1658                 if (!DBA::isResult($item)) {
1659                         Logger::warning('Item could not be fetched', ['uri-id' => $uri_id, 'uid' => $source_uid]);
1660                         return 0;
1661                 }
1662
1663                 if (($uid != 0) && ($item['gravity'] == self::GRAVITY_PARENT)) {
1664                         $owner = User::getOwnerDataById($uid);
1665                         if (($owner['contact-type'] == User::ACCOUNT_TYPE_COMMUNITY) && !Tag::isMentioned($uri_id, $owner['url'])) {
1666                                 Logger::info('Target user is a group but is not mentioned here, thread will not be stored', ['uid' => $uid, 'uri-id' => $uri_id]);
1667                                 return 0;
1668                         }
1669                 }
1670
1671                 if (($source_uid == 0) && (($item['private'] == self::PRIVATE) || !in_array($item['network'], Protocol::FEDERATED))) {
1672                         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']]);
1673                         return 0;
1674                 }
1675
1676                 $item['post-reason'] = self::PR_STORED;
1677
1678                 $item = array_merge($item, $fields);
1679
1680                 if (($uid != 0) && Contact::isSharing(($item['gravity'] == Item::GRAVITY_PARENT) ? $item['owner-id'] : $item['author-id'], $uid)) {
1681                         $item['post-reason'] = self::PR_FOLLOWER;
1682                 }
1683
1684                 $is_reshare = ($item['gravity'] == self::GRAVITY_ACTIVITY) && ($item['verb'] == Activity::ANNOUNCE);
1685
1686                 if (($uid != 0) && (($item['gravity'] == self::GRAVITY_PARENT) || $is_reshare) &&
1687                         DI::pConfig()->get($uid, 'system', 'accept_only_sharer') == self::COMPLETION_NONE &&
1688                         !in_array($item['post-reason'], [self::PR_FOLLOWER, self::PR_TAG, self::PR_TO, self::PR_CC, self::PR_ACTIVITY, self::PR_AUDIENCE])
1689                 ) {
1690                         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']]);
1691                         return 0;
1692                 }
1693
1694                 $causer = $item['causer-id'] ?: $item['author-id'];
1695
1696                 if (($uri_id != $item['parent-uri-id']) && ($item['gravity'] == self::GRAVITY_COMMENT) && !Post::exists(['uri-id' => $item['parent-uri-id'], 'uid' => $uid])) {
1697                         if (!self::fetchParent($item['parent-uri-id'], $uid, $causer)) {
1698                                 Logger::info('Parent post had not been added', ['uri-id' => $item['parent-uri-id'], 'uid' => $uid, 'causer' => $causer]);
1699                                 return 0;
1700                         }
1701                         Logger::info('Fetched parent post', ['uri-id' => $item['parent-uri-id'], 'uid' => $uid, 'causer' => $causer]);
1702                 } elseif (($uri_id != $item['thr-parent-id']) && $is_reshare && !Post::exists(['uri-id' => $item['thr-parent-id'], 'uid' => $uid])) {
1703                         if (!self::fetchParent($item['thr-parent-id'], $uid, $causer)) {
1704                                 Logger::info('Thread parent had not been added', ['uri-id' => $item['thr-parent-id'], 'uid' => $uid, 'causer' => $causer]);
1705                                 return 0;
1706                         }
1707                         Logger::info('Fetched thread parent', ['uri-id' => $item['thr-parent-id'], 'uid' => $uid, 'causer' => $causer]);
1708                 }
1709
1710                 $stored = self::storeForUser($item, $uid);
1711                 Logger::info('Item stored for user', ['uri-id' => $item['uri-id'], 'uid' => $uid, 'causer' => $causer, 'source-uid' => $source_uid, 'stored' => $stored]);
1712                 return $stored;
1713         }
1714
1715         /**
1716          * Fetch the parent with the given uri-id
1717          *
1718          * @param integer $uri_id
1719          * @param integer $uid
1720          * @param integer $causer
1721          *
1722          * @return integer
1723          */
1724         private static function fetchParent(int $uri_id, int $uid, int $causer): int
1725         {
1726                 // Fetch the origin user for the post
1727                 $origin_uid = self::GetOriginUidForUriId($uri_id, $uid);
1728                 if (is_null($origin_uid)) {
1729                         Logger::info('Origin item was not found', ['uid' => $uid, 'uri-id' => $uri_id]);
1730                         return 0;
1731                 }
1732
1733                 return self::storeForUserByUriId($uri_id, $uid, ['causer-id' => $causer, 'post-reason' => self::PR_FETCHED], $origin_uid);
1734         }
1735
1736         /**
1737          * Returns the origin uid of a post if the given user is allowed to see it.
1738          *
1739          * @param int $uriid
1740          * @param int $uid
1741          * @return int
1742          */
1743         private static function GetOriginUidForUriId(int $uriid, int $uid)
1744         {
1745                 if (Post::exists(['uri-id' => $uriid, 'uid' => $uid])) {
1746                         return $uid;
1747                 }
1748
1749                 $post = Post::selectFirst(['uid', 'allow_cid', 'allow_gid', 'deny_cid', 'deny_gid', 'private'], ['uri-id' => $uriid, 'origin' => true]);
1750                 if (!empty($post)) {
1751                         if (in_array($post['private'], [Item::PUBLIC, Item::UNLISTED])) {
1752                                 return $post['uid'];
1753                         }
1754
1755                         $pcid = Contact::getPublicIdByUserId($uid);
1756                         if (empty($pcid)) {
1757                                 return null;
1758                         }
1759
1760                         foreach (Item::enumeratePermissions($post, true) as $receiver) {
1761                                 if ($receiver == $pcid) {
1762                                         return $post['uid'];
1763                                 }
1764                         }
1765
1766                         return null;
1767                 }
1768
1769                 if (Post::exists(['uri-id' => $uriid, 'uid' => 0])) {
1770                         return 0;
1771                 }
1772
1773                 // When the post belongs to a a group then all group users are allowed to access it
1774                 foreach (Tag::getByURIId($uriid, [Tag::MENTION, Tag::EXCLUSIVE_MENTION]) as $tag) {
1775                         if (DBA::exists('contact', ['uid' => $uid, 'nurl' => Strings::normaliseLink($tag['url']), 'contact-type' => Contact::TYPE_COMMUNITY])) {
1776                                 $target_uid = User::getIdForURL($tag['url']);
1777                                 if (!empty($target_uid)) {
1778                                         return $target_uid;
1779                                 }
1780                         }
1781                 }
1782
1783                 return null;
1784         }
1785
1786         /**
1787          * Store a public item array for the given users
1788          *
1789          * @param array   $item   The item entry that will be stored
1790          * @param integer $uid    The user that will receive the item entry
1791          * @return integer stored item id
1792          * @throws \Exception
1793          */
1794         private static function storeForUser(array $item, int $uid): int
1795         {
1796                 $post = Post::selectFirst(['id'], ['uri-id' => $item['uri-id'], 'uid' => $uid]);
1797                 if (!empty($post['id'])) {
1798                         if (!empty($item['event-id'])) {
1799                                 $event_post = Post::selectFirst(['event-id'], ['uri-id' => $item['uri-id'], 'uid' => $uid]);
1800                                 if (!empty($event_post['event-id'])) {
1801                                         $event = DBA::selectFirst('event', ['edited', 'start', 'finish', 'summary', 'desc', 'location', 'nofinish'], ['id' => $item['event-id']]);
1802                                         if (!empty($event)) {
1803                                                 // We aren't using "Event::store" here, since we don't want to trigger any further action
1804                                                 $ret = DBA::update('event', $event, ['id' => $event_post['event-id']]);
1805                                                 Logger::info('Event updated', ['uid' => $uid, 'source-event' => $item['event-id'], 'target-event' => $event_post['event-id'], 'ret' => $ret]);
1806                                         }
1807                                 }
1808                         }
1809                         Logger::info('Item already exists', ['uri-id' => $item['uri-id'], 'uid' => $uid, 'id' => $post['id']]);
1810                         return $post['id'];
1811                 }
1812
1813                 // Data from the "post-user" table
1814                 unset($item['id']);
1815                 unset($item['mention']);
1816                 unset($item['starred']);
1817                 unset($item['unseen']);
1818                 unset($item['psid']);
1819                 unset($item['pinned']);
1820                 unset($item['ignored']);
1821                 unset($item['pubmail']);
1822                 unset($item['event-id']);
1823                 unset($item['hidden']);
1824                 unset($item['notification-type']);
1825
1826                 // Data from the "post-delivery-data" table
1827                 unset($item['postopts']);
1828                 unset($item['inform']);
1829
1830                 $item['uid'] = $uid;
1831                 $item['origin'] = 0;
1832                 $item['wall'] = 0;
1833
1834                 $notify = false;
1835                 if ($item['gravity'] == self::GRAVITY_PARENT) {
1836                         $contact = DBA::selectFirst('contact', [], ['id' => $item['contact-id'], 'self' => false]);
1837                         if (DBA::isResult($contact)) {
1838                                 $notify = self::isRemoteSelf($contact, $item);
1839                                 $item['wall'] = (bool)$notify;
1840                         }
1841                 }
1842
1843                 $item['contact-id'] = self::contactId($item);
1844                 $distributed = self::insert($item, $notify);
1845
1846                 if (!$distributed) {
1847                         Logger::info("Distributed item wasn't stored", ['uri-id' => $item['uri-id'], 'user' => $uid]);
1848                 } else {
1849                         Logger::info('Distributed item was stored', ['uri-id' => $item['uri-id'], 'user' => $uid, 'stored' => $distributed]);
1850                 }
1851                 return $distributed;
1852         }
1853
1854         /**
1855          * Add a shadow entry for a given item id that is a thread starter
1856          *
1857          * We store every public item entry additionally with the user id "0".
1858          * This is used for the community page and for the search.
1859          * It is planned that in the future we will store public item entries only once.
1860          *
1861          * @param integer $itemid Item ID that should be added
1862          * @throws \Exception
1863          */
1864         private static function addShadow(int $itemid)
1865         {
1866                 $fields = ['uid', 'private', 'visible', 'deleted', 'network', 'uri-id'];
1867                 $condition = ['id' => $itemid, 'gravity' => self::GRAVITY_PARENT];
1868                 $item = Post::selectFirst($fields, $condition);
1869
1870                 if (!DBA::isResult($item)) {
1871                         return;
1872                 }
1873
1874                 // is it already a copy?
1875                 if (($itemid == 0) || ($item['uid'] == 0)) {
1876                         return;
1877                 }
1878
1879                 // Is it a visible public post?
1880                 if (!$item["visible"] || $item["deleted"]  || ($item["private"] == self::PRIVATE)) {
1881                         return;
1882                 }
1883
1884                 // is it an entry from a connector? Only add an entry for natively connected networks
1885                 if (!in_array($item["network"], array_merge(Protocol::FEDERATED, ['']))) {
1886                         return;
1887                 }
1888
1889                 if (Post::exists(['uri-id' => $item['uri-id'], 'uid' => 0])) {
1890                         return;
1891                 }
1892
1893                 $item = Post::selectFirst(array_merge(self::ITEM_FIELDLIST, ['protocol']), ['id' => $itemid]);
1894
1895                 if (DBA::isResult($item)) {
1896                         // Preparing public shadow (removing user specific data)
1897                         $item['uid'] = 0;
1898                         unset($item['id']);
1899                         unset($item['parent']);
1900                         unset($item['wall']);
1901                         unset($item['mention']);
1902                         unset($item['origin']);
1903                         unset($item['starred']);
1904                         unset($item['postopts']);
1905                         unset($item['inform']);
1906                         unset($item['post-reason']);
1907                         if ($item['uri-id'] == $item['parent-uri-id']) {
1908                                 $item['contact-id'] = $item['owner-id'];
1909                         } else {
1910                                 $item['contact-id'] = $item['author-id'];
1911                         }
1912
1913                         $public_shadow = self::insert($item);
1914
1915                         Logger::info('Stored public shadow', ['thread' => $itemid, 'id' => $public_shadow]);
1916                 }
1917         }
1918
1919         /**
1920          * Add a shadow entry for a given item id that is a comment
1921          *
1922          * This function does the same like the function above - but for comments
1923          *
1924          * @param integer $itemid Item ID that should be added
1925          * @throws \Exception
1926          */
1927         private static function addShadowPost(int $itemid)
1928         {
1929                 $item = Post::selectFirst(array_merge(self::ITEM_FIELDLIST, ['protocol']), ['id' => $itemid]);
1930                 if (!DBA::isResult($item)) {
1931                         return;
1932                 }
1933
1934                 // Is it a toplevel post?
1935                 if ($item['gravity'] == self::GRAVITY_PARENT) {
1936                         self::addShadow($itemid);
1937                         return;
1938                 }
1939
1940                 // Is this a shadow entry?
1941                 if ($item['uid'] == 0) {
1942                         return;
1943                 }
1944
1945                 // Is there a shadow parent?
1946                 if (!Post::exists(['uri-id' => $item['parent-uri-id'], 'uid' => 0])) {
1947                         return;
1948                 }
1949
1950                 // Is there already a shadow entry?
1951                 if (Post::exists(['uri-id' => $item['uri-id'], 'uid' => 0])) {
1952                         return;
1953                 }
1954
1955                 // Save "origin" and "parent" state
1956                 $origin = $item['origin'];
1957                 $parent = $item['parent'];
1958
1959                 // Preparing public shadow (removing user specific data)
1960                 $item['uid'] = 0;
1961                 unset($item['id']);
1962                 unset($item['parent']);
1963                 unset($item['wall']);
1964                 unset($item['mention']);
1965                 unset($item['origin']);
1966                 unset($item['starred']);
1967                 unset($item['postopts']);
1968                 unset($item['inform']);
1969                 unset($item['post-reason']);
1970                 $item['contact-id'] = Contact::getIdForURL($item['author-link']);
1971
1972                 $public_shadow = self::insert($item);
1973
1974                 Logger::info('Stored public shadow', ['uri-id' => $item['uri-id'], 'id' => $public_shadow]);
1975
1976                 // If this was a comment to a Diaspora post we don't get our comment back.
1977                 // This means that we have to distribute the comment by ourselves.
1978                 if ($origin && Post::exists(['id' => $parent, 'network' => Protocol::DIASPORA])) {
1979                         self::distribute($public_shadow);
1980                 }
1981         }
1982
1983         /**
1984          * Adds a language specification in a "language" element of given $arr.
1985          * Expects "body" element to exist in $arr.
1986          *
1987          * @param array $item
1988          * @return string detected language
1989          * @throws \Text_LanguageDetect_Exception
1990          */
1991         private static function getLanguage(array $item): string
1992         {
1993                 if (!empty($item['language'])) {
1994                         return $item['language'];
1995                 }
1996
1997                 if (!in_array($item['gravity'], [self::GRAVITY_PARENT, self::GRAVITY_COMMENT]) || empty($item['body'])) {
1998                         return '';
1999                 }
2000
2001                 $languages = self::getLanguageArray($item['title'] . ' ' . ($item['content-warning'] ?? '') . ' ' . $item['body'], 3, $item['uri-id'], $item['author-id']);
2002                 if (empty($languages)) {
2003                         return '';
2004                 }
2005
2006                 return json_encode($languages);
2007         }
2008
2009         /**
2010          * Get a language array from a given text
2011          *
2012          * @param string  $body
2013          * @param integer $count
2014          * @param integer $uri_id
2015          * @param integer $author_id
2016          * @return array
2017          */
2018         public static function getLanguageArray(string $body, int $count, int $uri_id = 0, int $author_id = 0): array
2019         {
2020                 $searchtext = BBCode::toSearchText($body, $uri_id);
2021
2022                 if ((count(explode(' ', $searchtext)) < 10) && (mb_strlen($searchtext) < 30) && $author_id) {
2023                         $author = Contact::selectFirst(['about'], ['id' => $author_id]);
2024                         if (!empty($author['about'])) {
2025                                 $about = BBCode::toSearchText($author['about'], 0);
2026                                 Logger::debug('About field added', ['author' => $author_id, 'body' => $searchtext, 'about' => $about]);
2027                                 $searchtext .= ' ' . $about;
2028                         }
2029                 }
2030
2031                 if (empty($searchtext)) {
2032                         return [];
2033                 }
2034
2035                 $availableLanguages = DI::l10n()->getAvailableLanguages(true);
2036                 $availableLanguages = DI::l10n()->convertForLanguageDetection($availableLanguages);
2037
2038                 $ld = new Language(array_keys($availableLanguages));
2039
2040                 $result = [];
2041
2042                 foreach (self::splitByBlocks($searchtext) as $block) {
2043                         $languages = $ld->detect($block)->limit(0, $count)->close() ?: [];
2044
2045                         $data = [
2046                                 'text'      => $block,
2047                                 'detected'  => $languages,
2048                                 'uri-id'    => $uri_id,
2049                                 'author-id' => $author_id,
2050                         ];
2051                         Hook::callAll('detect_languages', $data);
2052
2053                         foreach ($data['detected'] as $language => $quality) {
2054                                 $result[$language] = max($result[$language] ?? 0, $quality * (strlen($block) / strlen($searchtext)));
2055                         }
2056                 }
2057
2058                 arsort($result);
2059                 $result = array_slice($result, 0, $count);
2060
2061                 return $result;
2062         }
2063
2064         /**
2065          * Split a string into different unicode blocks
2066          * Currently the text is split into the latin and the non latin part.
2067          *
2068          * @param string $body
2069          * @return array
2070          */
2071         private static function splitByBlocks(string $body): array
2072         {
2073                 if (!class_exists('IntlChar')) {
2074                         return [$body];
2075                 }
2076
2077                 $blocks         = [];
2078                 $previous_block = 0;
2079
2080                 for ($i = 0; $i < mb_strlen($body); $i++) {
2081                         $character = mb_substr($body, $i, 1);
2082                         $previous  = ($i > 0) ? mb_substr($body, $i - 1, 1) : '';
2083                         $next      = ($i < mb_strlen($body)) ? mb_substr($body, $i + 1, 1) : '';
2084
2085                         if (!\IntlChar::isalpha($character)) {
2086                                 if (($previous != '') && (\IntlChar::isalpha($previous))) {
2087                                         $previous_block = self::getBlockCode($previous);
2088                                 }
2089
2090                                 $block = (($next != '') && \IntlChar::isalpha($next)) ? self::getBlockCode($next) : $previous_block;
2091                                 $blocks[$block] = ($blocks[$block] ?? '') . $character;
2092                         } else {
2093                                 $block = self::getBlockCode($character);
2094                                 $blocks[$block] = ($blocks[$block] ?? '') . $character;
2095                         }
2096                 }
2097
2098                 foreach (array_keys($blocks) as $key) {
2099                         $blocks[$key] = trim($blocks[$key]);
2100                         if (empty($blocks[$key])) {
2101                                 unset($blocks[$key]);
2102                         }
2103                 }
2104
2105                 return array_values($blocks);
2106         }
2107
2108         /**
2109          * returns the block code for the given character
2110          *
2111          * @param string $character
2112          * @return integer 0 = no alpha character (blank, signs, emojis, ...), 1 = latin character, 2 = character in every other language
2113          */
2114         private static function getBlockCode(string $character): int
2115         {
2116                 if (!\IntlChar::isalpha($character)) {
2117                         return 0;
2118                 }
2119                 return self::isLatin($character) ? 1 : 2;
2120         }
2121
2122         /**
2123          * Checks if the given character is in one of the latin code blocks
2124          *
2125          * @param string $character
2126          * @return boolean
2127          */
2128         private static function isLatin(string $character): bool
2129         {
2130                 return in_array(\IntlChar::getBlockCode($character), [
2131                         \IntlChar::BLOCK_CODE_BASIC_LATIN, \IntlChar::BLOCK_CODE_LATIN_1_SUPPLEMENT,
2132                         \IntlChar::BLOCK_CODE_LATIN_EXTENDED_A, \IntlChar::BLOCK_CODE_LATIN_EXTENDED_B,
2133                         \IntlChar::BLOCK_CODE_LATIN_EXTENDED_C, \IntlChar::BLOCK_CODE_LATIN_EXTENDED_D,
2134                         \IntlChar::BLOCK_CODE_LATIN_EXTENDED_E, \IntlChar::BLOCK_CODE_LATIN_EXTENDED_ADDITIONAL
2135                 ]);
2136         }
2137
2138         public static function getLanguageMessage(array $item): string
2139         {
2140                 $iso639 = new \Matriphe\ISO639\ISO639;
2141
2142                 $used_languages = '';
2143                 foreach (json_decode($item['language'], true) as $language => $reliability) {
2144                         $used_languages .= $iso639->nativeByCode1(substr($language, 0, 2)) . ' (' . $iso639->languageByCode1(substr($language, 0, 2)) . ' - ' . $language . "): " . number_format($reliability, 5) . '\n';
2145                 }
2146                 $used_languages = DI::l10n()->t('Detected languages in this post:\n%s', $used_languages);
2147                 return $used_languages;
2148         }
2149
2150         /**
2151          * Creates an unique guid out of a given uri.
2152          * This function is used for messages outside the fediverse (Connector posts, feeds, Mails, ...)
2153          * Posts that are created on this system are using System::createUUID.
2154          * Received ActivityPub posts are using Processor::getGUIDByURL.
2155          *
2156          * @param string      $uri  uri of an item entry
2157          * @param string|null $host hostname for the GUID prefix
2158          * @return string Unique guid
2159          * @throws \Exception
2160          */
2161         public static function guidFromUri(string $uri, string $host = null): string
2162         {
2163                 // Our regular guid routine is using this kind of prefix as well
2164                 // We have to avoid that different routines could accidentally create the same value
2165                 $parsed = parse_url($uri);
2166
2167                 // Remove the scheme to make sure that "https" and "http" doesn't make a difference
2168                 unset($parsed['scheme']);
2169
2170                 $hostPart = $host ?: $parsed['host'] ?? '';
2171                 if (!$hostPart) {
2172                         Logger::warning('Empty host GUID part', ['uri' => $uri, 'host' => $host, 'parsed' => $parsed]);
2173                 }
2174
2175                 // Glue it together to be able to make a hash from it
2176                 if (!empty($parsed)) {
2177                         $host_id = implode('/', $parsed);
2178                 } else {
2179                         $host_id = $uri;
2180                 }
2181
2182                 // Use a mixture of several hashes to provide some GUID like experience
2183                 return hash('crc32', $hostPart) . '-' . hash('joaat', $host_id) . '-' . hash('fnv164', $host_id);
2184         }
2185
2186         /**
2187          * generate an unique URI
2188          *
2189          * @param string $guid An existing GUID (Otherwise it will be generated)
2190          *
2191          * @return string
2192          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
2193          */
2194         public static function newURI(string $guid = ''): string
2195         {
2196                 if ($guid == '') {
2197                         $guid = System::createUUID();
2198                 }
2199
2200                 return DI::baseUrl() . '/objects/' . $guid;
2201         }
2202
2203         /**
2204          * Set "success_update" and "last-item" to the date of the last time we heard from this contact
2205          *
2206          * This can be used to filter for inactive contacts.
2207          * Only do this for public postings to avoid privacy problems, since poco data is public.
2208          * Don't set this value if it isn't from the owner (could be an author that we don't know)
2209          *
2210          * @param array $arr Contains the just posted item record
2211          * @throws \Exception
2212          */
2213         private static function updateContact(array $arr)
2214         {
2215                 // Unarchive the author
2216                 $contact = DBA::selectFirst('contact', [], ['id' => $arr["author-id"]]);
2217                 if (DBA::isResult($contact)) {
2218                         Contact::unmarkForArchival($contact);
2219                 }
2220
2221                 // Unarchive the contact if it's not our own contact
2222                 $contact = DBA::selectFirst('contact', [], ['id' => $arr["contact-id"], 'self' => false]);
2223                 if (DBA::isResult($contact)) {
2224                         Contact::unmarkForArchival($contact);
2225                 }
2226
2227                 /// @todo On private posts we could obfuscate the date
2228                 $update = ($arr['private'] != self::PRIVATE) || in_array($arr['network'], Protocol::FEDERATED);
2229
2230                 // Is it a group? Then we don't care about the rules from above
2231                 if (!$update && in_array($arr["network"], [Protocol::ACTIVITYPUB, Protocol::DFRN]) && ($arr["parent-uri-id"] === $arr["uri-id"])) {
2232                         if (DBA::exists('contact', ['id' => $arr['contact-id'], 'forum' => true])) {
2233                                 $update = true;
2234                         }
2235                 }
2236
2237                 if ($update) {
2238                         // The "self" contact id is used (for example in the connectors) when the contact is unknown
2239                         // So we have to ensure to only update the last item when it had been our own post,
2240                         // or it had been done by a "regular" contact.
2241                         if (!empty($arr['wall'])) {
2242                                 $condition = ['id' => $arr['contact-id']];
2243                         } else {
2244                                 $condition = ['id' => $arr['contact-id'], 'self' => false];
2245                         }
2246                         Contact::update(['failed' => false, 'local-data' => true, 'success_update' => $arr['received'], 'last-item' => $arr['received']], $condition);
2247                 }
2248                 // Now do the same for the system wide contacts with uid=0
2249                 if ($arr['private'] != self::PRIVATE) {
2250                         Contact::update(
2251                                 ['failed' => false, 'local-data' => true, 'success_update' => $arr['received'], 'last-item' => $arr['received']],
2252                                 ['id' => $arr['owner-id']]
2253                         );
2254
2255                         if ($arr['owner-id'] != $arr['author-id']) {
2256                                 Contact::update(
2257                                         ['failed' => false, 'local-data' => true, 'success_update' => $arr['received'], 'last-item' => $arr['received']],
2258                                         ['id' => $arr['author-id']]
2259                                 );
2260                         }
2261                 }
2262         }
2263
2264         public static function setHashtags(string $body): string
2265         {
2266                 $body = BBCode::performWithEscapedTags($body, ['noparse', 'pre', 'code', 'img'], function ($body) {
2267                         $tags = BBCode::getTags($body);
2268
2269                         // No hashtags?
2270                         if (!count($tags)) {
2271                                 return $body;
2272                         }
2273
2274                         // This sorting is important when there are hashtags that are part of other hashtags
2275                         // Otherwise there could be problems with hashtags like #test and #test2
2276                         // Because of this we are sorting from the longest to the shortest tag.
2277                         usort($tags, function ($a, $b) {
2278                                 return strlen($b) <=> strlen($a);
2279                         });
2280
2281                         $URLSearchString = "^\[\]";
2282
2283                         // All hashtags should point to the home server if "local_tags" is activated
2284                         if (DI::config()->get('system', 'local_tags')) {
2285                                 $body = preg_replace(
2286                                         "/#\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",
2287                                         "#[url=" . DI::baseUrl() . "/search?tag=$2]$2[/url]",
2288                                         $body
2289                                 );
2290                         }
2291
2292                         // mask hashtags inside of url, bookmarks and attachments to avoid urls in urls
2293                         $body = preg_replace_callback(
2294                                 "/\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",
2295                                 function ($match) {
2296                                         return ("[url=" . str_replace("#", "&num;", $match[1]) . "]" . str_replace("#", "&num;", $match[2]) . "[/url]");
2297                                 },
2298                                 $body
2299                         );
2300
2301                         $body = preg_replace_callback(
2302                                 "/\[bookmark\=([$URLSearchString]*)\](.*?)\[\/bookmark\]/ism",
2303                                 function ($match) {
2304                                         return ("[bookmark=" . str_replace("#", "&num;", $match[1]) . "]" . str_replace("#", "&num;", $match[2]) . "[/bookmark]");
2305                                 },
2306                                 $body
2307                         );
2308
2309                         $body = preg_replace_callback(
2310                                 "/\[attachment (.*?)\](.*?)\[\/attachment\]/ism",
2311                                 function ($match) {
2312                                         return ("[attachment " . str_replace("#", "&num;", $match[1]) . "]" . $match[2] . "[/attachment]");
2313                                 },
2314                                 $body
2315                         );
2316
2317                         // Repair recursive urls
2318                         $body = preg_replace(
2319                                 "/&num;\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",
2320                                 "&num;$2",
2321                                 $body
2322                         );
2323
2324                         foreach ($tags as $tag) {
2325                                 if ((strpos($tag, '#') !== 0) || strpos($tag, '[url=') || strlen($tag) < 2 || $tag[1] == '#') {
2326                                         continue;
2327                                 }
2328
2329                                 $basetag = str_replace('_', ' ', substr($tag, 1));
2330                                 $newtag = '#[url=' . DI::baseUrl() . '/search?tag=' . $basetag . ']' . $basetag . '[/url]';
2331
2332                                 $body = str_replace($tag, $newtag, $body);
2333                         }
2334
2335                         // Convert back the masked hashtags
2336                         $body = str_replace("&num;", "#", $body);
2337
2338                         return $body;
2339                 });
2340
2341                 return $body;
2342         }
2343
2344         /**
2345          * look for mention tags and setup a second delivery chain for group/community posts if appropriate
2346          *
2347          * @param int $uid
2348          * @param int $item_id
2349          * @return boolean true if item was deleted, else false
2350          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
2351          * @throws \ImagickException
2352          */
2353         private static function tagDeliver(int $uid, int $item_id): bool
2354         {
2355                 $owner = User::getOwnerDataById($uid);
2356                 if (!DBA::isResult($owner)) {
2357                         Logger::warning('User not found, quitting here.', ['uid' => $uid]);
2358                         return false;
2359                 }
2360
2361                 if ($owner['contact-type'] != User::ACCOUNT_TYPE_COMMUNITY) {
2362                         Logger::debug('Owner is no community, quitting here.', ['uid' => $uid, 'id' => $item_id]);
2363                         return false;
2364                 }
2365
2366                 $item = Post::selectFirst(self::ITEM_FIELDLIST, ['id' => $item_id, 'gravity' => [self::GRAVITY_PARENT, self::GRAVITY_COMMENT], 'origin' => false]);
2367                 if (!DBA::isResult($item)) {
2368                         Logger::debug('Post is an activity or origin or not found at all, quitting here.', ['id' => $item_id]);
2369                         return false;
2370                 }
2371
2372                 if ($item['gravity'] == self::GRAVITY_PARENT) {
2373                         if (Tag::isMentioned($item['uri-id'], $owner['url'])) {
2374                                 Logger::info('Mention found in tag.', ['uri' => $item['uri'], 'uid' => $uid, 'id' => $item_id, 'uri-id' => $item['uri-id'], 'guid' => $item['guid']]);
2375                         } else {
2376                                 Logger::info('Top-level post without mention is deleted.', ['uri' => $item['uri'], $uid, 'id' => $item_id, 'uri-id' => $item['uri-id'], 'guid' => $item['guid']]);
2377                                 Post\User::delete(['uri-id' => $item['uri-id'], 'uid' => $item['uid']]);
2378                                 return true;
2379                         }
2380
2381                         $arr = ['item' => $item, 'user' => $owner];
2382
2383                         Hook::callAll('tagged', $arr);
2384                 } else {
2385                         if (Tag::isMentioned($item['parent-uri-id'], $owner['url'])) {
2386                                 Logger::info('Mention found in parent tag.', ['uri' => $item['uri'], 'uid' => $uid, 'id' => $item_id, 'uri-id' => $item['uri-id'], 'guid' => $item['guid']]);
2387                         } else {
2388                                 Logger::debug('No mentions found in parent, quitting here.', ['id' => $item_id, 'uri-id' => $item['uri-id'], 'guid' => $item['guid']]);
2389                                 return false;
2390                         }
2391                 }
2392
2393                 Logger::info('Community post will be distributed', ['uri' => $item['uri'], 'uid' => $uid, 'id' => $item_id, 'uri-id' => $item['uri-id'], 'guid' => $item['guid']]);
2394
2395                 if ($owner['page-flags'] == User::PAGE_FLAGS_PRVGROUP) {
2396                         $allow_cid = '';
2397                         $allow_gid = '<' . Circle::FOLLOWERS . '>';
2398                         $deny_cid  = '';
2399                         $deny_gid  = '';
2400                         self::performActivity($item['id'], 'announce', $uid, $allow_cid, $allow_gid, $deny_cid, $deny_gid);
2401                 } else {
2402                         self::performActivity($item['id'], 'announce', $uid);
2403                 }
2404
2405                 Logger::info('Community post had been distributed', ['uri' => $item['uri'], 'uid' => $uid, 'id' => $item_id, 'uri-id' => $item['uri-id'], 'guid' => $item['guid']]);
2406                 return false;
2407         }
2408
2409         /**
2410          * Automatically reshare the item if the "remote_self" option is selected
2411          *
2412          * @param array $item
2413          * @return void
2414          */
2415         private static function autoReshare(array $item)
2416         {
2417                 if ($item['gravity'] != self::GRAVITY_PARENT) {
2418                         return;
2419                 }
2420
2421                 $cdata = Contact::getPublicAndUserContactID($item['author-id'], $item['uid']);
2422                 if (empty($cdata['user']) || ($cdata['user'] != $item['contact-id'])) {
2423                         return;
2424                 }
2425
2426                 if (!DBA::exists('contact', ['id' => $cdata['user'], 'remote_self' => LocalRelationship::MIRROR_NATIVE_RESHARE])) {
2427                         return;
2428                 }
2429
2430                 if (!in_array($item['network'], [Protocol::ACTIVITYPUB, Protocol::DFRN])) {
2431                         return;
2432                 }
2433
2434                 if (User::getById($item['uid'], ['blocked'])['blocked'] ?? false) {
2435                         return;
2436                 }
2437
2438                 Logger::info('Automatically reshare item', ['uid' => $item['uid'], 'id' => $item['id'], 'guid' => $item['guid'], 'uri-id' => $item['uri-id']]);
2439
2440                 self::performActivity($item['id'], 'announce', $item['uid']);
2441         }
2442
2443         public static function isRemoteSelf(array $contact, array &$datarray): bool
2444         {
2445                 if ($contact['remote_self'] != LocalRelationship::MIRROR_OWN_POST) {
2446                         return false;
2447                 }
2448
2449                 // Prevent the forwarding of posts that are forwarded
2450                 if (!empty($datarray['extid']) && ($datarray['extid'] == Protocol::DFRN)) {
2451                         Logger::info('Already forwarded');
2452                         return false;
2453                 }
2454
2455                 // Prevent to forward already forwarded posts
2456                 if ($datarray['app'] == DI::baseUrl()->getHost()) {
2457                         Logger::info('Already forwarded (second test)');
2458                         return false;
2459                 }
2460
2461                 // Only forward posts
2462                 if ($datarray['verb'] != Activity::POST) {
2463                         Logger::info('No post');
2464                         return false;
2465                 }
2466
2467                 if (($contact['network'] != Protocol::FEED) && ($datarray['private'] == self::PRIVATE)) {
2468                         Logger::info('Not public');
2469                         return false;
2470                 }
2471
2472                 if (User::getById($contact['uid'], ['blocked'])['blocked'] ?? false) {
2473                         Logger::info('User is blocked', ['contact' => $contact]);
2474                         return false;
2475                 }
2476
2477                 $datarray2 = $datarray;
2478                 Logger::info('remote-self start', ['contact' => $contact['url'], 'remote_self' => $contact['remote_self'], 'item' => $datarray]);
2479
2480                 $self = DBA::selectFirst(
2481                         'contact',
2482                         ['id', 'name', 'url', 'thumb'],
2483                         ['uid' => $contact['uid'], 'self' => true]
2484                 );
2485                 if (!DBA::isResult($self)) {
2486                         Logger::error('Self contact not found', ['uid' => $contact['uid']]);
2487                         return false;
2488                 }
2489
2490                 $datarray['contact-id'] = $self['id'];
2491
2492                 $datarray['author-name']   = $datarray['owner-name']   = $self['name'];
2493                 $datarray['author-link']   = $datarray['owner-link']   = $self['url'];
2494                 $datarray['author-avatar'] = $datarray['owner-avatar'] = $self['thumb'];
2495
2496                 unset($datarray['edited']);
2497
2498                 unset($datarray['network']);
2499                 unset($datarray['owner-id']);
2500                 unset($datarray['author-id']);
2501
2502                 if ($contact['network'] != Protocol::FEED) {
2503                         $old_uri_id = $datarray['uri-id'] ?? 0;
2504                         $datarray['guid'] = System::createUUID();
2505                         unset($datarray['plink']);
2506                         $datarray['uri'] = self::newURI($datarray['guid']);
2507                         $datarray['uri-id'] = ItemURI::getIdByURI($datarray['uri']);
2508                         $datarray['extid'] = Protocol::DFRN;
2509                         $urlpart = parse_url($datarray2['author-link']);
2510                         $datarray['app'] = $urlpart['host'];
2511                         if (!empty($old_uri_id)) {
2512                                 Post\Media::copy($old_uri_id, $datarray['uri-id']);
2513                         }
2514
2515                         unset($datarray['parent-uri']);
2516                         unset($datarray['thr-parent']);
2517
2518                         // Store the original post
2519                         $result = self::insert($datarray2);
2520                         Logger::info('remote-self post original item', ['contact' => $contact['url'], 'result' => $result, 'item' => $datarray2]);
2521                 } else {
2522                         $datarray['private'] = self::PUBLIC;
2523                         $datarray['app'] = 'Feed';
2524                         $result = true;
2525                 }
2526
2527                 return (bool)$result;
2528         }
2529
2530         /**
2531          *
2532          * @param string $s
2533          * @param int    $uid
2534          * @param array  $item
2535          * @param int    $cid
2536          * @return string
2537          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
2538          * @throws \ImagickException
2539          */
2540         public static function fixPrivatePhotos(string $s, int $uid, array $item = null, int $cid = 0): string
2541         {
2542                 if (DI::config()->get('system', 'disable_embedded')) {
2543                         return $s;
2544                 }
2545
2546                 Logger::info('check for photos');
2547                 $site = substr(DI::baseUrl(), strpos(DI::baseUrl(), '://'));
2548
2549                 $orig_body = $s;
2550                 $new_body = '';
2551
2552                 $img_start = strpos($orig_body, '[img');
2553                 $img_st_close = ($img_start !== false ? strpos(substr($orig_body, $img_start), ']') : false);
2554                 $img_len = ($img_start !== false ? strpos(substr($orig_body, $img_start + $img_st_close + 1), '[/img]') : false);
2555
2556                 while (($img_st_close !== false) && ($img_len !== false)) {
2557                         $img_st_close++; // make it point to AFTER the closing bracket
2558                         $image = substr($orig_body, $img_start + $img_st_close, $img_len);
2559
2560                         Logger::info('found photo', ['image' => $image]);
2561
2562                         if (stristr($image, $site . '/photo/')) {
2563                                 // Only embed locally hosted photos
2564                                 $replace = false;
2565                                 $i = basename($image);
2566                                 $i = str_replace(['.jpg', '.png', '.gif'], ['', '', ''], $i);
2567                                 $x = strpos($i, '-');
2568
2569                                 if ($x) {
2570                                         $res = substr($i, $x + 1);
2571                                         $i = substr($i, 0, $x);
2572                                         $photo = Photo::getPhotoForUser($uid, $i, $res);
2573                                         if (DBA::isResult($photo)) {
2574                                                 /*
2575                                                  * Check to see if we should replace this photo link with an embedded image
2576                                                  * 1. No need to do so if the photo is public
2577                                                  * 2. If there's a contact-id provided, see if they're in the access list
2578                                                  *    for the photo. If so, embed it.
2579                                                  * 3. Otherwise, if we have an item, see if the item permissions match the photo
2580                                                  *    permissions, regardless of order but first check to see if they're an exact
2581                                                  *    match to save some processing overhead.
2582                                                  */
2583                                                 if (self::hasPermissions($photo)) {
2584                                                         if ($cid) {
2585                                                                 $recips = self::enumeratePermissions($photo);
2586                                                                 if (in_array($cid, $recips)) {
2587                                                                         $replace = true;
2588                                                                 }
2589                                                         } elseif ($item) {
2590                                                                 if (self::samePermissions($uid, $item, $photo)) {
2591                                                                         $replace = true;
2592                                                                 }
2593                                                         }
2594                                                 }
2595                                                 if ($replace) {
2596                                                         $photo_img = Photo::getImageForPhoto($photo);
2597                                                         // If a custom width and height were specified, apply before embedding
2598                                                         if (preg_match("/\[img\=([0-9]*)x([0-9]*)\]/is", substr($orig_body, $img_start, $img_st_close), $match)) {
2599                                                                 Logger::info('scaling photo');
2600
2601                                                                 $width = intval($match[1]);
2602                                                                 $height = intval($match[2]);
2603
2604                                                                 $photo_img->scaleDown(max($width, $height));
2605                                                         }
2606
2607                                                         $data = $photo_img->asString();
2608                                                         $type = $photo_img->getType();
2609
2610                                                         Logger::info('replacing photo');
2611                                                         $image = 'data:' . $type . ';base64,' . base64_encode($data);
2612                                                         Logger::debug('replaced', ['image' => $image]);
2613                                                 }
2614                                         }
2615                                 }
2616                         }
2617
2618                         $new_body = $new_body . substr($orig_body, 0, $img_start + $img_st_close) . $image . '[/img]';
2619                         $orig_body = substr($orig_body, $img_start + $img_st_close + $img_len + strlen('[/img]'));
2620                         if ($orig_body === false) {
2621                                 $orig_body = '';
2622                         }
2623
2624                         $img_start = strpos($orig_body, '[img');
2625                         $img_st_close = ($img_start !== false ? strpos(substr($orig_body, $img_start), ']') : false);
2626                         $img_len = ($img_start !== false ? strpos(substr($orig_body, $img_start + $img_st_close + 1), '[/img]') : false);
2627                 }
2628
2629                 $new_body = $new_body . $orig_body;
2630
2631                 return $new_body;
2632         }
2633
2634         private static function hasPermissions(array $obj)
2635         {
2636                 return !empty($obj['allow_cid']) || !empty($obj['allow_gid']) ||
2637                         !empty($obj['deny_cid']) || !empty($obj['deny_gid']);
2638         }
2639
2640         // @TODO $uid is unused parameter
2641         private static function samePermissions($uid, array $obj1, array $obj2): bool
2642         {
2643                 // first part is easy. Check that these are exactly the same.
2644                 if (($obj1['allow_cid'] == $obj2['allow_cid'])
2645                         && ($obj1['allow_gid'] == $obj2['allow_gid'])
2646                         && ($obj1['deny_cid'] == $obj2['deny_cid'])
2647                         && ($obj1['deny_gid'] == $obj2['deny_gid'])
2648                 ) {
2649                         return true;
2650                 }
2651
2652                 // This is harder. Parse all the permissions and compare the resulting set.
2653                 $recipients1 = self::enumeratePermissions($obj1);
2654                 $recipients2 = self::enumeratePermissions($obj2);
2655                 sort($recipients1);
2656                 sort($recipients2);
2657
2658                 /// @TODO Comparison of arrays, maybe use array_diff_assoc() here?
2659                 return ($recipients1 == $recipients2);
2660         }
2661
2662         /**
2663          * Returns an array of contact-ids that are allowed to see this object
2664          *
2665          * @param array $obj              Item array with at least uid, allow_cid, allow_gid, deny_cid and deny_gid
2666          * @param bool  $check_dead       Prunes unavailable contacts from the result
2667          * @param bool  $expand_followers Expand the list of followers
2668          * @return array
2669          * @throws \Exception
2670          */
2671         public static function enumeratePermissions(array $obj, bool $check_dead = false, bool $expand_followers = true): array
2672         {
2673                 $aclFormatter = DI::aclFormatter();
2674
2675                 if (!$expand_followers && (!empty($obj['deny_cid']) || !empty($obj['deny_gid']))) {
2676                         $expand_followers = true;
2677                 }
2678
2679                 $allow_people  = $aclFormatter->expand($obj['allow_cid']);
2680                 $allow_circles = Circle::expand($obj['uid'], $aclFormatter->expand($obj['allow_gid']), $check_dead, $expand_followers);
2681                 $deny_people   = $aclFormatter->expand($obj['deny_cid']);
2682                 $deny_circles  = Circle::expand($obj['uid'], $aclFormatter->expand($obj['deny_gid']), $check_dead);
2683                 $recipients    = array_unique(array_merge($allow_people, $allow_circles));
2684                 $deny          = array_unique(array_merge($deny_people, $deny_circles));
2685                 $recipients    = array_diff($recipients, $deny);
2686                 return $recipients;
2687         }
2688
2689         public static function expire(int $uid, int $days, string $network = "", bool $force = false)
2690         {
2691                 if (!$uid || ($days < 1)) {
2692                         return;
2693                 }
2694
2695                 $condition = [
2696                         "`uid` = ? AND NOT `deleted` AND `gravity` = ?",
2697                         $uid, self::GRAVITY_PARENT
2698                 ];
2699
2700                 /*
2701                  * $expire_network_only = save your own wall posts
2702                  * and just expire conversations started by others
2703                  */
2704                 $expire_network_only = DI::pConfig()->get($uid, 'expire', 'network_only', false);
2705
2706                 if ($expire_network_only) {
2707                         $condition[0] .= " AND NOT `wall`";
2708                 }
2709
2710                 if ($network != "") {
2711                         $condition[0] .= " AND `network` = ?";
2712                         $condition[] = $network;
2713                 }
2714
2715                 $condition[0] .= " AND `received` < ?";
2716                 $condition[] = DateTimeFormat::utc('now - ' . $days . ' day');
2717
2718                 $items = Post::select(['resource-id', 'starred', 'id', 'post-type', 'uid', 'uri-id'], $condition);
2719
2720                 if (!DBA::isResult($items)) {
2721                         return;
2722                 }
2723
2724                 $expire_items = (bool)DI::pConfig()->get($uid, 'expire', 'items', true);
2725
2726                 // Forcing expiring of items - but not notes and marked items
2727                 if ($force) {
2728                         $expire_items = true;
2729                 }
2730
2731                 $expire_notes = (bool)DI::pConfig()->get($uid, 'expire', 'notes', true);
2732                 $expire_starred = (bool)DI::pConfig()->get($uid, 'expire', 'starred', true);
2733                 $expire_photos = (bool)DI::pConfig()->get($uid, 'expire', 'photos', false);
2734
2735                 $expired = 0;
2736
2737                 $priority = DI::config()->get('system', 'expire-notify-priority');
2738
2739                 while ($item = Post::fetch($items)) {
2740                         // don't expire filed items
2741                         if (DBA::exists('post-category', ['uri-id' => $item['uri-id'], 'uid' => $item['uid'], 'type' => Post\Category::FILE])) {
2742                                 continue;
2743                         }
2744
2745                         // Only expire posts, not photos and photo comments
2746
2747                         if (!$expire_photos && !empty($item['resource-id'])) {
2748                                 continue;
2749                         } elseif (!$expire_starred && intval($item['starred'])) {
2750                                 continue;
2751                         } elseif (!$expire_notes && ($item['post-type'] == self::PT_PERSONAL_NOTE)) {
2752                                 continue;
2753                         } elseif (!$expire_items && ($item['post-type'] != self::PT_PERSONAL_NOTE)) {
2754                                 continue;
2755                         }
2756
2757                         self::markForDeletionById($item['id'], $priority);
2758
2759                         ++$expired;
2760                 }
2761                 DBA::close($items);
2762                 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]);
2763         }
2764
2765         public static function firstPostDate(int $uid, bool $wall = false)
2766         {
2767                 $user = User::getById($uid, ['register_date']);
2768                 if (empty($user)) {
2769                         return false;
2770                 }
2771
2772                 $condition = [
2773                         "`uid` = ? AND `wall` = ? AND NOT `deleted` AND `visible` AND `received` >= ?",
2774                         $uid, $wall, $user['register_date']
2775                 ];
2776                 $params = ['order' => ['received' => false]];
2777                 $thread = Post::selectFirstThread(['received'], $condition, $params);
2778                 if (DBA::isResult($thread)) {
2779                         $postdate = substr(DateTimeFormat::local($thread['received']), 0, 10);
2780                         return $postdate;
2781                 }
2782                 return false;
2783         }
2784
2785         /**
2786          * add/remove activity to an item
2787          *
2788          * Toggle activities as like,dislike,attend of an item
2789          *
2790          * @param int    $item_id
2791          * @param string $verb
2792          *            Activity verb. One of
2793          *            like, unlike, dislike, undislike, attendyes, unattendyes,
2794          *            attendno, unattendno, attendmaybe, unattendmaybe,
2795          *            announce, unannounce
2796          * @param int    $uid
2797          * @param string $allow_cid
2798          * @param string $allow_gid
2799          * @param string $deny_cid
2800          * @param string $deny_gid
2801          * @return bool
2802          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
2803          * @throws \ImagickException
2804          * @hook  'post_local_end'
2805          *            array $arr
2806          *            'post_id' => ID of posted item
2807          */
2808         public static function performActivity(int $item_id, string $verb, int $uid, string $allow_cid = null, string $allow_gid = null, string $deny_cid = null, string $deny_gid = null): bool
2809         {
2810                 if (empty($uid)) {
2811                         return false;
2812                 }
2813
2814                 Logger::notice('Start create activity', ['verb' => $verb, 'item' => $item_id, 'user' => $uid]);
2815
2816                 $item = Post::selectFirst(self::ITEM_FIELDLIST, ['id' => $item_id]);
2817                 if (!DBA::isResult($item)) {
2818                         Logger::warning('Post had not been fetched', ['id' => $item_id]);
2819                         return false;
2820                 }
2821
2822                 $uri_id = $item['uri-id'];
2823
2824                 if (!in_array($item['uid'], [0, $uid])) {
2825                         return false;
2826                 }
2827
2828                 if (!Post::exists(['uri-id' => $item['parent-uri-id'], 'uid' => $uid])) {
2829                         $stored = self::storeForUserByUriId($item['parent-uri-id'], $uid, ['post-reason' => Item::PR_ACTIVITY]);
2830                         if (($item['parent-uri-id'] == $item['uri-id']) && !empty($stored)) {
2831                                 $item = Post::selectFirst(self::ITEM_FIELDLIST, ['id' => $stored]);
2832                                 if (!DBA::isResult($item)) {
2833                                         Logger::info('Could not fetch just created item - should not happen', ['stored' => $stored, 'uid' => $uid, 'uri-id' => $uri_id]);
2834                                         return false;
2835                                 }
2836                         }
2837                 }
2838
2839                 // Retrieves the local post owner
2840                 $owner = User::getOwnerDataById($uid);
2841                 if (empty($owner)) {
2842                         Logger::info('Empty owner for user', ['uid' => $uid]);
2843                         return false;
2844                 }
2845
2846                 // Retrieve the current logged in user's public contact
2847                 $author_id = Contact::getPublicIdByUserId($uid);
2848                 if (empty($author_id)) {
2849                         Logger::info('Empty public contact');
2850                         return false;
2851                 }
2852
2853                 $activity = null;
2854                 switch ($verb) {
2855                         case 'like':
2856                         case 'unlike':
2857                                 $activity = Activity::LIKE;
2858                                 break;
2859                         case 'dislike':
2860                         case 'undislike':
2861                                 $activity = Activity::DISLIKE;
2862                                 break;
2863                         case 'attendyes':
2864                         case 'unattendyes':
2865                                 $activity = Activity::ATTEND;
2866                                 break;
2867                         case 'attendno':
2868                         case 'unattendno':
2869                                 $activity = Activity::ATTENDNO;
2870                                 break;
2871                         case 'attendmaybe':
2872                         case 'unattendmaybe':
2873                                 $activity = Activity::ATTENDMAYBE;
2874                                 break;
2875                         case 'follow':
2876                         case 'unfollow':
2877                                 $activity = Activity::FOLLOW;
2878                                 break;
2879                         case 'announce':
2880                         case 'unannounce':
2881                                 $activity = Activity::ANNOUNCE;
2882                                 break;
2883                         default:
2884                                 Logger::warning('unknown verb', ['verb' => $verb, 'item' => $item_id]);
2885                                 return false;
2886                 }
2887
2888                 $mode = Strings::startsWith($verb, 'un') ? 'delete' : 'create';
2889
2890                 // Enable activity toggling instead of on/off
2891                 $event_verb_flag = $activity === Activity::ATTEND || $activity === Activity::ATTENDNO || $activity === Activity::ATTENDMAYBE;
2892
2893                 // Look for an existing verb row
2894                 // Event participation activities are mutually exclusive, only one of them can exist at all times.
2895                 if ($event_verb_flag) {
2896                         $verbs = [Activity::ATTEND, Activity::ATTENDNO, Activity::ATTENDMAYBE];
2897
2898                         // Translate to the index based activity index
2899                         $vids = [];
2900                         foreach ($verbs as $verb) {
2901                                 $vids[] = Verb::getID($verb);
2902                         }
2903                 } else {
2904                         $vids = Verb::getID($activity);
2905                 }
2906
2907                 $condition = [
2908                         'vid' => $vids, 'deleted' => false, 'gravity' => self::GRAVITY_ACTIVITY,
2909                         'author-id' => $author_id, 'uid' => $uid, 'thr-parent-id' => $uri_id
2910                 ];
2911                 $like_item = Post::selectFirst(['id', 'guid', 'verb'], $condition);
2912
2913                 if (DBA::isResult($like_item)) {
2914                         /**
2915                          * Truth table for existing activities
2916                          *
2917                          * |          Inputs            ||      Outputs      |
2918                          * |----------------------------||-------------------|
2919                          * |  Mode  | Event | Same verb || Delete? | Return? |
2920                          * |--------|-------|-----------||---------|---------|
2921                          * | create |  Yes  |    Yes    ||   No    |   Yes   |
2922                          * | create |  Yes  |    No     ||   Yes   |   No    |
2923                          * | create |  No   |    Yes    ||   No    |   Yes   |
2924                          * | create |  No   |    No     ||        N/A†       |
2925                          * | delete |  Yes  |    Yes    ||   Yes   |   N/A‡  |
2926                          * | delete |  Yes  |    No     ||   No    |   N/A‡  |
2927                          * | delete |  No   |    Yes    ||   Yes   |   N/A‡  |
2928                          * | delete |  No   |    No     ||        N/A†       |
2929                          * |--------|-------|-----------||---------|---------|
2930                          * |   A    |   B   |     C     || A xor C | !B or C |
2931                          *
2932                          * † Can't happen: It's impossible to find an existing non-event activity without
2933                          *                 the same verb because we are only looking for this single verb.
2934                          *
2935                          * ‡ The "mode = delete" is returning early whether an existing activity was found or not.
2936                          */
2937                         if ($mode == 'create' xor $like_item['verb'] == $activity) {
2938                                 self::markForDeletionById($like_item['id']);
2939                         }
2940
2941                         if (!$event_verb_flag || $like_item['verb'] == $activity) {
2942                                 return true;
2943                         }
2944                 }
2945
2946                 // No need to go further if we aren't creating anything
2947                 if ($mode == 'delete') {
2948                         return true;
2949                 }
2950
2951                 $objtype = $item['resource-id'] ? Activity\ObjectType::IMAGE : Activity\ObjectType::NOTE;
2952
2953                 $new_item = [
2954                         'guid'          => System::createUUID(),
2955                         'uri'           => self::newURI(),
2956                         'uid'           => $uid,
2957                         'contact-id'    => $owner['id'],
2958                         'wall'          => $item['wall'],
2959                         'origin'        => 1,
2960                         'network'       => Protocol::DFRN,
2961                         'protocol'      => Conversation::PARCEL_DIRECT,
2962                         'direction'     => Conversation::PUSH,
2963                         'gravity'       => self::GRAVITY_ACTIVITY,
2964                         'parent'        => $item['id'],
2965                         'thr-parent'    => $item['uri'],
2966                         'owner-id'      => $author_id,
2967                         'author-id'     => $author_id,
2968                         'body'          => $activity,
2969                         'verb'          => $activity,
2970                         'object-type'   => $objtype,
2971                         'allow_cid'     => $allow_cid ?? $item['allow_cid'],
2972                         'allow_gid'     => $allow_gid ?? $item['allow_gid'],
2973                         'deny_cid'      => $deny_cid ?? $item['deny_cid'],
2974                         'deny_gid'      => $deny_gid ?? $item['deny_gid'],
2975                         'visible'       => 1,
2976                         'unseen'        => 1,
2977                 ];
2978
2979                 if (in_array($activity, [Activity::LIKE, Activity::DISLIKE])) {
2980                         $signed = Diaspora::createLikeSignature($uid, $new_item);
2981                         if (!empty($signed)) {
2982                                 $new_item['diaspora_signed_text'] = json_encode($signed);
2983                         }
2984                 }
2985
2986                 self::insert($new_item, true);
2987
2988                 // If the parent item isn't visible then set it to visible
2989                 // @todo Check if this is still needed
2990                 if (!$item['visible']) {
2991                         self::update(['visible' => true], ['id' => $item['id']]);
2992                 }
2993                 return true;
2994         }
2995
2996         /**
2997          * Fetch the SQL condition for the given user id
2998          *
2999          * @param integer $owner_id User ID for which the permissions should be fetched
3000          * @return array condition
3001          */
3002         public static function getPermissionsConditionArrayByUserId(int $owner_id): array
3003         {
3004                 $local_user = DI::userSession()->getLocalUserId();
3005                 $remote_user = DI::userSession()->getRemoteContactID($owner_id);
3006
3007                 // default permissions - anonymous user
3008                 $condition = ["`private` != ?", self::PRIVATE];
3009
3010                 if ($local_user && ($local_user == $owner_id)) {
3011                         // Profile owner - everything is visible
3012                         $condition = [];
3013                 } elseif ($remote_user) {
3014                         // Authenticated visitor - fetch the matching permissionsets
3015                         $permissionSets = DI::permissionSet()->selectByContactId($remote_user, $owner_id);
3016                         if (!empty($set)) {
3017                                 $condition = [
3018                                         "(`private` != ? OR (`private` = ? AND `wall`
3019                                         AND `psid` IN (" . implode(', ', array_fill(0, count($set), '?')) . ")))",
3020                                         self::PRIVATE, self::PRIVATE
3021                                 ];
3022                                 $condition = array_merge($condition, $permissionSets->column('id'));
3023                         }
3024                 }
3025
3026                 return $condition;
3027         }
3028
3029         /**
3030          * Get a permission SQL string for the given user
3031          *
3032          * @param int $owner_id
3033          * @param string $table
3034          * @return string
3035          */
3036         public static function getPermissionsSQLByUserId(int $owner_id, string $table = ''): string
3037         {
3038                 $local_user = DI::userSession()->getLocalUserId();
3039                 $remote_user = DI::userSession()->getRemoteContactID($owner_id);
3040
3041                 if (!empty($table)) {
3042                         $table = DBA::quoteIdentifier($table) . '.';
3043                 }
3044
3045                 /*
3046                  * Construct permissions
3047                  *
3048                  * default permissions - anonymous user
3049                  */
3050                 $sql = sprintf(" AND " . $table . "`private` != %d", self::PRIVATE);
3051
3052                 // Profile owner - everything is visible
3053                 if ($local_user && ($local_user == $owner_id)) {
3054                         $sql = '';
3055                 } elseif ($remote_user) {
3056                         /*
3057                          * Authenticated visitor. Unless pre-verified,
3058                          * check that the contact belongs to this $owner_id
3059                          * and load the circles the visitor belongs to.
3060                          * If pre-verified, the caller is expected to have already
3061                          * done this and passed the circles into this function.
3062                          */
3063                         $permissionSets = DI::permissionSet()->selectByContactId($remote_user, $owner_id);
3064
3065                         if (!empty($set)) {
3066                                 $sql_set = sprintf(" OR (" . $table . "`private` = %d AND " . $table . "`wall` AND " . $table . "`psid` IN (", self::PRIVATE) . implode(',', $permissionSets->column('id')) . "))";
3067                         } else {
3068                                 $sql_set = '';
3069                         }
3070
3071                         $sql = sprintf(" AND (" . $table . "`private` != %d", self::PRIVATE) . $sql_set . ")";
3072                 }
3073
3074                 return $sql;
3075         }
3076
3077         /**
3078          * get translated item type
3079          *
3080          * @param array                $item
3081          * @param \Friendica\Core\L10n $l10n
3082          * @return string
3083          */
3084         public static function postType(array $item, \Friendica\Core\L10n $l10n): string
3085         {
3086                 if (!empty($item['event-id'])) {
3087                         return $l10n->t('event');
3088                 } elseif (!empty($item['resource-id'])) {
3089                         return $l10n->t('photo');
3090                 } elseif ($item['gravity'] == self::GRAVITY_ACTIVITY) {
3091                         return $l10n->t('activity');
3092                 } elseif ($item['gravity'] == self::GRAVITY_COMMENT) {
3093                         return $l10n->t('comment');
3094                 }
3095
3096                 return $l10n->t('post');
3097         }
3098
3099         /**
3100          * Sets the "rendered-html" field of the provided item
3101          *
3102          * Body is preserved to avoid side-effects as we modify it just-in-time for spoilers and private image links
3103          *
3104          * @param array $item
3105          *
3106          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
3107          * @todo Remove reference, simply return "rendered-html" and "rendered-hash"
3108          */
3109         private static function putInCache(&$item)
3110         {
3111                 // Save original body to prevent addons to modify it
3112                 $body = $item['body'];
3113
3114                 $rendered_hash = $item['rendered-hash'] ?? '';
3115                 $rendered_html = $item['rendered-html'] ?? '';
3116
3117                 if (
3118                         $rendered_hash == ''
3119                         || $rendered_html == ''
3120                         || $rendered_hash != hash('md5', BBCode::VERSION . '::' . $body)
3121                         || DI::config()->get('system', 'ignore_cache')
3122                 ) {
3123                         $item['rendered-html'] = BBCode::convertForUriId($item['uri-id'], $item['body']);
3124                         $item['rendered-hash'] = hash('md5', BBCode::VERSION . '::' . $body);
3125
3126                         $hook_data = ['item' => $item, 'rendered-html' => $item['rendered-html'], 'rendered-hash' => $item['rendered-hash']];
3127                         Hook::callAll('put_item_in_cache', $hook_data);
3128                         $item['rendered-html'] = $hook_data['rendered-html'];
3129                         $item['rendered-hash'] = $hook_data['rendered-hash'];
3130                         unset($hook_data);
3131
3132                         // Update if the generated values differ from the existing ones
3133                         if ((($rendered_hash != $item['rendered-hash']) || ($rendered_html != $item['rendered-html'])) && !empty($item['id'])) {
3134                                 self::update(
3135                                         [
3136                                                 'rendered-html' => $item['rendered-html'],
3137                                                 'rendered-hash' => $item['rendered-hash']
3138                                         ],
3139                                         ['id' => $item['id']]
3140                                 );
3141                         }
3142                 }
3143
3144                 $item['body'] = $body;
3145         }
3146
3147         /**
3148          * Given an item array, convert the body element from bbcode to html and add smilie icons.
3149          * If attach is true, also add icons for item attachments.
3150          *
3151          * @param array   $item Record from item table
3152          * @param boolean $attach If true, add icons for item attachments as well
3153          * @param boolean $is_preview Whether this is a preview
3154          * @param boolean $only_cache Whether only cached HTML should be updated
3155          * @return string item body html
3156          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
3157          * @throws \ImagickException
3158          * @hook  prepare_body_init item array before any work
3159          * @hook  prepare_body_content_filter ('item'=>item array, 'filter_reasons'=>string array) before first bbcode to html
3160          * @hook  prepare_body ('item'=>item array, 'html'=>body string, 'is_preview'=>boolean, 'filter_reasons'=>string array) after first bbcode to html
3161          * @hook  prepare_body_final ('item'=>item array, 'html'=>body string) after attach icons and blockquote special case handling (spoiler, author)
3162          */
3163         public static function prepareBody(array &$item, bool $attach = false, bool $is_preview = false, bool $only_cache = false): string
3164         {
3165                 $a = DI::app();
3166                 Hook::callAll('prepare_body_init', $item);
3167
3168
3169                 // In order to provide theme developers more possibilities, event items
3170                 // are treated differently.
3171                 if ($item['object-type'] === Activity\ObjectType::EVENT && isset($item['event-id'])) {
3172                         $ev = Event::getItemHTML($item);
3173                         return $ev;
3174                 }
3175
3176                 $tags = Tag::populateFromItem($item);
3177
3178                 $item['tags'] = $tags['tags'];
3179                 $item['hashtags'] = $tags['hashtags'];
3180                 $item['mentions'] = $tags['mentions'];
3181
3182                 if (!$is_preview) {
3183                         $item['body'] = preg_replace("#\s*\[attachment .*?].*?\[/attachment]\s*#ism", "\n", $item['body']);
3184                         $item['body'] = Post\Media::removeFromEndOfBody($item['body'] ?? '');
3185                         $item['body'] = Post\Media::replaceImage($item['body']);
3186                 }
3187
3188                 $body = $item['body'];
3189                 if ($is_preview) {
3190                         $item['body'] = preg_replace("#\s*\[attachment .*?].*?\[/attachment]\s*#ism", "\n", $item['body']);
3191                 }
3192
3193                 $fields = ['uri-id', 'uri', 'body', 'title', 'author-name', 'author-link', 'author-avatar', 'guid', 'created', 'plink', 'network', 'has-media', 'quote-uri-id', 'post-type'];
3194
3195                 $shared_uri_id      = 0;
3196                 $shared_links       = [];
3197                 $quote_shared_links = [];
3198
3199                 $shared = DI::contentItem()->getSharedPost($item, $fields);
3200                 if (!empty($shared['post'])) {
3201                         $shared_item  = $shared['post'];
3202                         $shared_item['body'] = Post\Media::removeFromEndOfBody($shared_item['body']);
3203                         $shared_item['body'] = Post\Media::replaceImage($shared_item['body']);
3204                         $quote_uri_id = $shared['post']['uri-id'];
3205                         $shared_links[] = strtolower($shared['post']['uri']);
3206                         $item['body'] = BBCode::removeSharedData($item['body']);
3207                 } elseif (empty($shared_item['uri-id']) && empty($item['quote-uri-id']) && ($item['network'] != Protocol::DIASPORA)) {
3208                         $media = Post\Media::getByURIId($item['uri-id'], [Post\Media::ACTIVITY]);
3209                         if (!empty($media) && ($media[0]['media-uri-id'] != $item['uri-id'])) {
3210                                 $shared_item = Post::selectFirst($fields, ['uri-id' => $media[0]['media-uri-id'], 'uid' => [$item['uid'], 0]]);
3211                                 if (empty($shared_item['uri-id'])) {
3212                                         $shared_item = Post::selectFirst($fields, ['plink' => $media[0]['url'], 'uid' => [$item['uid'], 0]]);
3213                                 } elseif (!in_array(strtolower($media[0]['url']), $shared_links)) {
3214                                         $shared_links[] = strtolower($media[0]['url']);
3215                                 }
3216
3217                                 if (empty($shared_item['uri-id'])) {
3218                                         $shared_item = Post::selectFirst($fields, ['uri' => $media[0]['url'], 'uid' => [$item['uid'], 0]]);
3219                                         $shared_links[] = strtolower($media[0]['url']);
3220                                 }
3221
3222                                 if (!empty($shared_item['uri-id'])) {
3223                                         $data = BBCode::getAttachmentData($shared_item['body']);
3224                                         if (!empty($data['url'])) {
3225                                                 $quote_shared_links[] = $data['url'];
3226                                         }
3227
3228                                         $quote_uri_id = $shared_item['uri-id'];
3229                                 }
3230                         }
3231                 }
3232
3233                 if (!empty($quote_uri_id)) {
3234                         if (isset($shared_item['plink'])) {
3235                                 $item['body'] .= "\n" . DI::contentItem()->createSharedBlockByArray($shared_item, false, true);
3236                         } else {
3237                                 DI::logger()->warning('Missing plink in shared item', ['item' => $item, 'shared' => $shared, 'quote_uri_id' => $quote_uri_id, 'shared_item' => $shared_item]);
3238                         }
3239                 }
3240
3241                 if (!empty($shared_item['uri-id'])) {
3242                         $shared_uri_id = $shared_item['uri-id'];
3243                         $shared_links[] = strtolower($shared_item['plink']);
3244                         $sharedSplitAttachments = DI::postMediaRepository()->splitAttachments($shared_uri_id, [], $shared_item['has-media']);
3245                         $shared_links = array_merge($shared_links, $sharedSplitAttachments['visual']->column('url'));
3246                         $shared_links = array_merge($shared_links, $sharedSplitAttachments['link']->column('url'));
3247                         $shared_links = array_merge($shared_links, $sharedSplitAttachments['additional']->column('url'));
3248                         $item['body'] = self::replaceVisualAttachments($sharedSplitAttachments['visual'], $item['body']);
3249                 }
3250
3251                 $itemSplitAttachments = DI::postMediaRepository()->splitAttachments($item['uri-id'], $shared_links, $item['has-media'] ?? false);
3252                 $item['body'] = self::replaceVisualAttachments($itemSplitAttachments['visual'], $item['body'] ?? '');
3253
3254                 self::putInCache($item);
3255                 $item['body'] = $body;
3256                 $s = $item["rendered-html"];
3257
3258                 if ($only_cache) {
3259                         return '';
3260                 }
3261
3262                 // Compile eventual content filter reasons
3263                 $filter_reasons = [];
3264                 if (!$is_preview && DI::userSession()->getPublicContactId() != $item['author-id']) {
3265                         if (!empty($item['user-blocked-author']) || !empty($item['user-blocked-owner'])) {
3266                                 $filter_reasons[] = DI::l10n()->t('%s is blocked', $item['author-name']);
3267                         } elseif (!empty($item['user-ignored-author']) || !empty($item['user-ignored-owner'])) {
3268                                 $filter_reasons[] = DI::l10n()->t('%s is ignored', $item['author-name']);
3269                         } elseif (!empty($item['user-collapsed-author']) || !empty($item['user-collapsed-owner'])) {
3270                                 $filter_reasons[] = DI::l10n()->t('Content from %s is collapsed', $item['author-name']);
3271                         }
3272
3273                         if (!empty($item['content-warning']) && (!DI::userSession()->getLocalUserId() || !DI::pConfig()->get(DI::userSession()->getLocalUserId(), 'system', 'disable_cw', false))) {
3274                                 $filter_reasons[] = DI::l10n()->t('Content warning: %s', $item['content-warning']);
3275                         }
3276
3277                         $item['attachments'] = $itemSplitAttachments;
3278
3279                         $hook_data = [
3280                                 'item' => $item,
3281                                 'filter_reasons' => $filter_reasons
3282                         ];
3283                         Hook::callAll('prepare_body_content_filter', $hook_data);
3284                         $filter_reasons = $hook_data['filter_reasons'];
3285                         unset($hook_data);
3286                 }
3287
3288                 $hook_data = [
3289                         'item' => $item,
3290                         'html' => $s,
3291                         'preview' => $is_preview,
3292                         'filter_reasons' => $filter_reasons
3293                 ];
3294                 Hook::callAll('prepare_body', $hook_data);
3295                 $s = $hook_data['html'];
3296
3297                 unset($hook_data);
3298
3299                 if (!$attach) {
3300                         // Replace the blockquotes with quotes that are used in mails.
3301                         $mailquote = '<blockquote type="cite" class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">';
3302                         $s = str_replace(['<blockquote>', '<blockquote class="spoiler">', '<blockquote class="author">'], [$mailquote, $mailquote, $mailquote], $s);
3303                         return $s;
3304                 }
3305
3306                 if (!empty($sharedSplitAttachments)) {
3307                         $s = self::addGallery($s, $sharedSplitAttachments['visual']);
3308                         $s = self::addVisualAttachments($sharedSplitAttachments['visual'], $shared_item, $s, true);
3309                         $s = self::addLinkAttachment($shared_uri_id ?: $item['uri-id'], $sharedSplitAttachments, $body, $s, true, $quote_shared_links);
3310                         $s = self::addNonVisualAttachments($sharedSplitAttachments['additional'], $item, $s, true);
3311                         $body = BBCode::removeSharedData($body);
3312                 }
3313
3314                 $pos = strpos($s, BBCode::SHARED_ANCHOR);
3315                 if ($pos) {
3316                         $shared_html = substr($s, $pos + strlen(BBCode::SHARED_ANCHOR));
3317                         $s = substr($s, 0, $pos);
3318                 }
3319
3320                 $s = self::addGallery($s, $itemSplitAttachments['visual']);
3321                 $s = self::addVisualAttachments($itemSplitAttachments['visual'], $item, $s, false);
3322                 $s = self::addLinkAttachment($item['uri-id'], $itemSplitAttachments, $body, $s, false, $shared_links);
3323                 $s = self::addNonVisualAttachments($itemSplitAttachments['additional'], $item, $s, false);
3324                 $s = self::addQuestions($item, $s);
3325
3326                 // Map.
3327                 if (strpos($s, '<div class="map">') !== false && !empty($item['coord'])) {
3328                         $x = Map::byCoordinates(trim($item['coord']));
3329                         if ($x) {
3330                                 $s = preg_replace('/\<div class\=\"map\"\>/', '$0' . $x, $s);
3331                         }
3332                 }
3333
3334                 // Replace friendica image url size with theme preference.
3335                 if (!empty($a->getThemeInfoValue('item_image_size'))) {
3336                         $ps = $a->getThemeInfoValue('item_image_size');
3337                         $s = preg_replace('|(<img[^>]+src="[^"]+/photo/[0-9a-f]+)-[0-9]|', "$1-" . $ps, $s);
3338                 }
3339
3340                 if (!empty($shared_html)) {
3341                         $s .= $shared_html;
3342                 }
3343
3344                 $s = HTML::applyContentFilter($s, $filter_reasons);
3345
3346                 $hook_data = ['item' => $item, 'html' => $s];
3347                 Hook::callAll('prepare_body_final', $hook_data);
3348                 return $hook_data['html'];
3349         }
3350
3351         /**
3352          * Modify links to pictures to links for the "Fancybox" gallery
3353          *
3354          * @param string     $s
3355          * @param PostMedias $PostMedias
3356          * @return string
3357          */
3358         private static function addGallery(string $s, PostMedias $PostMedias): string
3359         {
3360                 foreach ($PostMedias as $PostMedia) {
3361                         if (!$PostMedia->preview || ($PostMedia->type !== Post\Media::IMAGE)) {
3362                                 continue;
3363                         }
3364
3365                         if ($PostMedia->hasDimensions()) {
3366                                 $pattern = '#<a href="' . preg_quote($PostMedia->url) . '">(.*?)"></a>#';
3367
3368                                 $s = preg_replace_callback($pattern, function () use ($PostMedia) {
3369                                         return Renderer::replaceMacros(Renderer::getMarkupTemplate('content/image/single_with_height_allocation.tpl'), [
3370                                                 '$image' => $PostMedia,
3371                                                 '$allocated_height' => $PostMedia->getAllocatedHeight(),
3372                                                 '$allocated_max_width' => ($PostMedia->previewWidth ?? $PostMedia->width) . 'px',
3373                                         ]);
3374                                 }, $s);
3375                         } else {
3376                                 $s = str_replace('<a href="' . $PostMedia->url . '"', '<a data-fancybox="uri-id-' . $PostMedia->uriId . '" href="' . $PostMedia->url . '"', $s);
3377                         }
3378                 }
3379
3380                 return $s;
3381         }
3382
3383         /**
3384          * Check if the body contains a link
3385          *
3386          * @param string $body
3387          * @param string $url
3388          * @param int    $type
3389          * @return bool
3390          */
3391         public static function containsLink(string $body, string $url, int $type = 0): bool
3392         {
3393                 // Make sure that for example site parameters aren't used when testing if the link is contained in the body
3394                 $urlparts = parse_url($url);
3395                 if (empty($urlparts)) {
3396                         return false;
3397                 }
3398
3399                 unset($urlparts['query']);
3400                 unset($urlparts['fragment']);
3401
3402                 try {
3403                         $url = (string)Uri::fromParts($urlparts);
3404                 } catch (\InvalidArgumentException $e) {
3405                         DI::logger()->notice('Invalid URL', ['$url' => $url, '$urlparts' => $urlparts]);
3406                         /* See https://github.com/friendica/friendica/issues/12113
3407                          * Malformed URLs will result in a Fatal Error
3408                          */
3409                         return false;
3410                 }
3411
3412                 // Remove media links to only search in embedded content
3413                 // @todo Check images for image link, audio for audio links, ...
3414                 if (in_array($type, [Post\Media::AUDIO, Post\Media::VIDEO, Post\Media::IMAGE])) {
3415                         $body = preg_replace("/\[url=[^\[\]]*\](.*)\[\/url\]/Usi", ' $1 ', $body);
3416                 }
3417
3418                 if (strpos($body, $url)) {
3419                         return true;
3420                 }
3421
3422                 foreach ([0, 1, 2] as $size) {
3423                         if (
3424                                 preg_match('#/photo/.*-' . $size . '\.#ism', $url) &&
3425                                 strpos(preg_replace('#(/photo/.*)-[012]\.#ism', '$1-' . $size . '.', $body), $url)
3426                         ) {
3427                                 return true;
3428                         }
3429                 }
3430
3431                 return false;
3432         }
3433
3434         /**
3435          * Replace visual attachments in the body
3436          *
3437          * @param PostMedias $PostMedias
3438          * @param string     $body
3439          * @return string modified body
3440          */
3441         private static function replaceVisualAttachments(PostMedias $PostMedias, string $body): string
3442         {
3443                 DI::profiler()->startRecording('rendering');
3444
3445                 foreach ($PostMedias as $PostMedia) {
3446                         if ($PostMedia->preview) {
3447                                 if (DI::baseUrl()->isLocalUri($PostMedia->preview)) {
3448                                         continue;
3449                                 }
3450                                 $proxy   = DI::baseUrl() . $PostMedia->getPreviewPath(Proxy::SIZE_LARGE);
3451                                 $search  = ['[img=' . $PostMedia->preview . ']', ']' . $PostMedia->preview . '[/img]'];
3452                                 $replace = ['[img=' . $proxy . ']', ']' . $proxy . '[/img]'];
3453
3454                                 $body = str_replace($search, $replace, $body);
3455                         } elseif ($PostMedia->mimetype->type == 'image') {
3456                                 if (DI::baseUrl()->isLocalUri($PostMedia->url)) {
3457                                         continue;
3458                                 }
3459                                 $proxy   = DI::baseUrl() . $PostMedia->getPreviewPath(Proxy::SIZE_LARGE);
3460                                 $search  = ['[img=' . $PostMedia->url . ']', ']' . $PostMedia->url . '[/img]'];
3461                                 $replace = ['[img=' . $proxy . ']', ']' . $proxy . '[/img]'];
3462
3463                                 $body = str_replace($search, $replace, $body);
3464                         }
3465                 }
3466                 DI::profiler()->stopRecording();
3467                 return $body;
3468         }
3469
3470         /**
3471          * Add visual attachments to the content
3472          *
3473          * @param PostMedias $PostMedias
3474          * @param array      $item
3475          * @param string     $content
3476          * @param bool       $shared
3477          * @return string modified content
3478          * @throws ServiceUnavailableException
3479          */
3480         private static function addVisualAttachments(PostMedias $PostMedias, array $item, string $content, bool $shared): string
3481         {
3482                 DI::profiler()->startRecording('rendering');
3483                 $leading  = '';
3484                 $trailing = '';
3485                 $images   = new PostMedias();
3486
3487                 // @todo In the future we should make a single for the template engine with all media in it. This allows more flexibilty.
3488                 foreach ($PostMedias as $PostMedia) {
3489                         if (self::containsLink($item['body'], $PostMedia->preview ?? $PostMedia->url, $PostMedia->type)) {
3490                                 continue;
3491                         }
3492
3493                         if ($PostMedia->mimetype->type == 'image' || $PostMedia->preview) {
3494                                 $preview_size = Proxy::SIZE_MEDIUM;
3495                                 $preview_url = DI::baseUrl() . $PostMedia->getPreviewPath($preview_size);
3496                         } else {
3497                                 $preview_size = 0;
3498                                 $preview_url = '';
3499                         }
3500
3501                         if ($preview_url && self::containsLink($item['body'], $preview_url)) {
3502                                 continue;
3503                         }
3504
3505                         if ($PostMedia->mimetype->type == 'video') {
3506                                 /// @todo Move the template to /content as well
3507                                 $media = Renderer::replaceMacros(Renderer::getMarkupTemplate('video_top.tpl'), [
3508                                         '$video' => [
3509                                                 'id'      => $PostMedia->id,
3510                                                 'src'     => (string)$PostMedia->url,
3511                                                 'name'    => $PostMedia->name ?: $PostMedia->url,
3512                                                 'preview' => $preview_url,
3513                                                 'mime'    => (string)$PostMedia->mimetype,
3514                                         ],
3515                                 ]);
3516                                 if (($item['post-type'] ?? null) == Item::PT_VIDEO) {
3517                                         $leading .= $media;
3518                                 } else {
3519                                         $trailing .= $media;
3520                                 }
3521                         } elseif ($PostMedia->mimetype->type == 'audio') {
3522                                 $media = Renderer::replaceMacros(Renderer::getMarkupTemplate('content/audio.tpl'), [
3523                                         '$audio' => [
3524                                                 'id'     => $PostMedia->id,
3525                                                 'src'    => (string)$PostMedia->url,
3526                                                 'name'   => $PostMedia->name ?: $PostMedia->url,
3527                                                 'mime'   => (string)$PostMedia->mimetype,
3528                                         ],
3529                                 ]);
3530                                 if (($item['post-type'] ?? null) == Item::PT_AUDIO) {
3531                                         $leading .= $media;
3532                                 } else {
3533                                         $trailing .= $media;
3534                                 }
3535                         } elseif ($PostMedia->mimetype->type == 'image') {
3536                                 $src_url = DI::baseUrl() . $PostMedia->getPhotoPath();
3537                                 if (self::containsLink($item['body'], $src_url)) {
3538                                         continue;
3539                                 }
3540
3541                                 $images[] = $PostMedia->withUrl(new Uri($src_url))->withPreview(new Uri($preview_url), $preview_size);
3542                         }
3543                 }
3544
3545                 $media = Image::getBodyAttachHtml($images);
3546
3547                 // On Diaspora posts the attached pictures are leading
3548                 if ($item['network'] == Protocol::DIASPORA) {
3549                         $leading .= $media;
3550                 } else {
3551                         $trailing .= $media;
3552                 }
3553
3554                 if ($shared) {
3555                         $content = str_replace(BBCode::TOP_ANCHOR, '<div class="body-attach">' . $leading . '</div>' . BBCode::TOP_ANCHOR, $content);
3556                         $content = str_replace(BBCode::BOTTOM_ANCHOR, '<div class="body-attach">' . $trailing . '</div>' . BBCode::BOTTOM_ANCHOR, $content);
3557                 } else {
3558                         if ($leading != '') {
3559                                 $content = '<div class="body-attach">' . $leading . '</div>' . $content;
3560                         }
3561
3562                         if ($trailing != '') {
3563                                 $content .= '<div class="body-attach">' . $trailing . '</div>';
3564                         }
3565                 }
3566
3567                 DI::profiler()->stopRecording();
3568                 return $content;
3569         }
3570
3571         /**
3572          * Add link attachment to the content
3573          *
3574          * @param int          $uriid
3575          * @param PostMedias[] $attachments
3576          * @param string       $body
3577          * @param string       $content
3578          * @param bool         $shared
3579          * @param array        $ignore_links A list of URLs to ignore
3580          * @return string modified content
3581          * @throws InternalServerErrorException
3582          * @throws ServiceUnavailableException
3583          */
3584         private static function addLinkAttachment(int $uriid, array $attachments, string $body, string $content, bool $shared, array $ignore_links): string
3585         {
3586                 DI::profiler()->startRecording('rendering');
3587                 // Don't show a preview when there is a visual attachment (audio or video)
3588                 $types = $attachments['visual']->column('type');
3589                 $preview = !in_array(PostMedia::TYPE_IMAGE, $types) && !in_array(PostMedia::TYPE_VIDEO, $types);
3590
3591                 /** @var ?PostMedia $attachment */
3592                 $attachment = null;
3593                 foreach ($attachments['link'] as $PostMedia) {
3594                         $found = false;
3595                         foreach ($ignore_links as $ignore_link) {
3596                                 if (Strings::compareLink($PostMedia->url, $ignore_link)) {
3597                                         $found = true;
3598                                 }
3599                         }
3600                         // @todo Judge between the links to use the one with most information
3601                         if (!$found && (empty($attachment) || $PostMedia->authorName ||
3602                                 (!$attachment->name && $PostMedia->name) ||
3603                                 (!$attachment->description && $PostMedia->description) ||
3604                                 (!$attachment->preview && $PostMedia->preview))) {
3605                                 $attachment = $PostMedia;
3606                         }
3607                 }
3608
3609                 if (!empty($attachment)) {
3610                         $data = [
3611                                 'after' => '',
3612                                 'author_name' => $attachment->authorName ?? '',
3613                                 'author_url' => (string)($attachment->authorUrl ?? ''),
3614                                 'description' => $attachment->description ?? '',
3615                                 'image' => '',
3616                                 'preview' => '',
3617                                 'provider_name' => $attachment->publisherName ?? '',
3618                                 'provider_url' => (string)($attachment->publisherUrl ?? ''),
3619                                 'text' => '',
3620                                 'title' => $attachment->name ?? '',
3621                                 'type' => 'link',
3622                                 'url' => (string)$attachment->url,
3623                         ];
3624
3625                         if ($preview && $attachment->preview) {
3626                                 if ($attachment->previewWidth >= 500) {
3627                                         $data['image'] = DI::baseUrl() . $attachment->getPreviewPath(Proxy::SIZE_MEDIUM);
3628                                 } else {
3629                                         $data['preview'] = DI::baseUrl() . $attachment->getPreviewPath(Proxy::SIZE_MEDIUM);
3630                                 }
3631                         }
3632
3633                         if (!empty($data['description']) && !empty($content)) {
3634                                 similar_text($data['description'], $content, $percent);
3635                         } else {
3636                                 $percent = 0;
3637                         }
3638
3639                         if (!empty($data['description']) && (($data['title'] == $data['description']) || ($percent > 95) || (strpos($content, $data['description']) !== false))) {
3640                                 $data['description'] = '';
3641                         }
3642
3643                         if (($data['author_name'] ?? '') == ($data['provider_name'] ?? '')) {
3644                                 $data['author_name'] = '';
3645                         }
3646
3647                         if (($data['author_url'] ?? '') == ($data['provider_url'] ?? '')) {
3648                                 $data['author_url'] = '';
3649                         }
3650                 } elseif (preg_match("/.*(\[attachment.*?\].*?\[\/attachment\]).*/ism", $body, $match)) {
3651                         $data = BBCode::getAttachmentData($match[1]);
3652                 }
3653                 DI::profiler()->stopRecording();
3654
3655                 if (isset($data['url']) && !in_array(strtolower($data['url']), $ignore_links)) {
3656                         if (!empty($data['description']) || !empty($data['image']) || !empty($data['preview']) || (!empty($data['title']) && !Strings::compareLink($data['title'], $data['url']))) {
3657                                 $parts = parse_url($data['url']);
3658                                 if (!empty($parts['scheme']) && !empty($parts['host'])) {
3659                                         if (empty($data['provider_name'])) {
3660                                                 $data['provider_name'] = $parts['host'];
3661                                         }
3662                                         if (empty($data['provider_url']) || empty(parse_url($data['provider_url'], PHP_URL_SCHEME))) {
3663                                                 $data['provider_url'] = $parts['scheme'] . '://' . $parts['host'];
3664
3665                                                 if (!empty($parts['port'])) {
3666                                                         $data['provider_url'] .= ':' . $parts['port'];
3667                                                 }
3668                                         }
3669                                 }
3670
3671                                 // @todo Use a template
3672                                 $preview_mode = DI::pConfig()->get(DI::userSession()->getLocalUserId(), 'system', 'preview_mode', BBCode::PREVIEW_LARGE);
3673                                 if ($preview_mode != BBCode::PREVIEW_NONE) {
3674                                         $rendered = BBCode::convertAttachment('', BBCode::INTERNAL, false, $data, $uriid, $preview_mode);
3675                                 } else {
3676                                         $rendered = '';
3677                                 }
3678                         } elseif (!self::containsLink($content, $data['url'], Post\Media::HTML)) {
3679                                 $rendered = Renderer::replaceMacros(Renderer::getMarkupTemplate('content/link.tpl'), [
3680                                         '$url'   => $data['url'],
3681                                         '$title' => $data['title'],
3682                                 ]);
3683                         } else {
3684                                 return $content;
3685                         }
3686
3687                         if ($shared) {
3688                                 return str_replace(BBCode::BOTTOM_ANCHOR, BBCode::BOTTOM_ANCHOR . $rendered, $content);
3689                         } else {
3690                                 return $content . $rendered;
3691                         }
3692                 }
3693                 return $content;
3694         }
3695
3696         /**
3697          * Add non-visual attachments to the content
3698          *
3699          * @param PostMedias $PostMedias
3700          * @param array      $item
3701          * @param string     $content
3702          * @return string modified content
3703          * @throws InternalServerErrorException
3704          * @throws \ImagickException
3705          */
3706         private static function addNonVisualAttachments(PostMedias $PostMedias, array $item, string $content): string
3707         {
3708                 DI::profiler()->startRecording('rendering');
3709                 $trailing = '';
3710                 foreach ($PostMedias as $PostMedia) {
3711                         if (strpos($item['body'], $PostMedia->url)) {
3712                                 continue;
3713                         }
3714
3715                         $author = [
3716                                 'uid'     => 0,
3717                                 'id'      => $item['author-id'],
3718                                 'network' => $item['author-network'],
3719                                 'url'     => $item['author-link'],
3720                                 'alias'   => $item['author-alias']
3721                         ];
3722                         $the_url = Contact::magicLinkByContact($author, $PostMedia->url);
3723
3724                         $title = Strings::escapeHtml(trim($PostMedia->description ?? '' ?: $PostMedia->url));
3725
3726                         if ($PostMedia->size) {
3727                                 $title .= ' ' . $PostMedia->size . ' ' . DI::l10n()->t('bytes');
3728                         }
3729
3730                         /// @todo Use a template
3731                         $icon = '<div class="attachtype icon s22 type-' . $PostMedia->mimetype->type . ' subtype-' . $PostMedia->mimetype->subtype . '"></div>';
3732                         $trailing .= '<a href="' . strip_tags($the_url) . '" title="' . $title . '" class="attachlink" target="_blank" rel="noopener noreferrer" >' . $icon . '</a>';
3733                 }
3734
3735                 if ($trailing != '') {
3736                         $content .= '<div class="body-attach">' . $trailing . '</div>';
3737                 }
3738
3739                 DI::profiler()->stopRecording();
3740                 return $content;
3741         }
3742
3743         private static function addQuestions(array $item, string $content): string
3744         {
3745                 DI::profiler()->startRecording('rendering');
3746                 if (!empty($item['question-id'])) {
3747                         $question = [
3748                                 'id'       => $item['question-id'],
3749                                 'multiple' => $item['question-multiple'],
3750                                 'voters'   => $item['question-voters'],
3751                                 'endtime'  => $item['question-end-time']
3752                         ];
3753
3754                         $options = Post\QuestionOption::getByURIId($item['uri-id']);
3755                         foreach ($options as $key => $option) {
3756                                 if ($question['voters'] > 0) {
3757                                         $percent = $option['replies'] / $question['voters'] * 100;
3758                                         $options[$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));
3759                                 } else {
3760                                         $options[$key]['vote'] = DI::l10n()->tt('%2$s (%1$d vote)', '%2$s (%1$d votes)', $option['replies'], $option['name']);
3761                                 }
3762                         }
3763
3764                         if (!empty($question['voters']) && !empty($question['endtime'])) {
3765                                 $summary = DI::l10n()->tt('%d voter. Poll end: %s', '%d voters. Poll end: %s', $question['voters'], Temporal::getRelativeDate($question['endtime']));
3766                         } elseif (!empty($question['voters'])) {
3767                                 $summary = DI::l10n()->tt('%d voter.', '%d voters.', $question['voters']);
3768                         } elseif (!empty($question['endtime'])) {
3769                                 $summary = DI::l10n()->t('Poll end: %s', Temporal::getRelativeDate($question['endtime']));
3770                         } else {
3771                                 $summary = '';
3772                         }
3773
3774                         $content .= Renderer::replaceMacros(Renderer::getMarkupTemplate('content/question.tpl'), [
3775                                 '$question' => $question,
3776                                 '$options'  => $options,
3777                                 '$summary'  => $summary,
3778                         ]);
3779                 }
3780                 DI::profiler()->stopRecording();
3781                 return $content;
3782         }
3783
3784         /**
3785          * get private link for item
3786          *
3787          * @param array $item
3788          * @return boolean|array False if item has not plink, otherwise array('href'=>plink url, 'title'=>translated title)
3789          * @throws \Exception
3790          */
3791         public static function getPlink(array $item)
3792         {
3793                 if (!empty($item['plink']) && Network::isValidHttpUrl($item['plink'])) {
3794                         $plink = $item['plink'];
3795                 } elseif (!empty($item['uri']) && Network::isValidHttpUrl($item['uri']) && !Network::isLocalLink($item['uri'])) {
3796                         $plink = $item['uri'];
3797                 }
3798
3799                 if (DI::userSession()->getLocalUserId()) {
3800                         $ret = [
3801                                 'href' => "display/" . $item['guid'],
3802                                 'orig' => "display/" . $item['guid'],
3803                                 'title' => DI::l10n()->t('View on separate page'),
3804                                 'orig_title' => DI::l10n()->t('View on separate page'),
3805                         ];
3806
3807                         if (!empty($plink) && ($item['private'] == self::PRIVATE)) {
3808                                 $author = [
3809                                         'uid'     => 0,
3810                                         'id'      => $item['author-id'],
3811                                         'network' => $item['author-network'],
3812                                         'url'     => $item['author-link'],
3813                                         'alias'   => $item['author-alias'],
3814                                 ];
3815                                 $plink = Contact::magicLinkByContact($author, $plink);
3816                         }
3817
3818                         if (!empty($plink)) {
3819                                 $ret['href'] = DI::baseUrl()->remove($plink);
3820                                 $ret['title'] = DI::l10n()->t('Link to source');
3821                         }
3822                 } elseif (!empty($plink) && ($item['private'] != self::PRIVATE)) {
3823                         $ret = [
3824                                 'href' => $plink,
3825                                 'orig' => $plink,
3826                                 'title' => DI::l10n()->t('Link to source'),
3827                                 'orig_title' => DI::l10n()->t('Link to source'),
3828                         ];
3829                 } else {
3830                         $ret = [];
3831                 }
3832
3833                 return $ret;
3834         }
3835
3836         /**
3837          * Does the given uri-id belongs to a post that is sent as starting post to a group?
3838          * This does apply to posts that are sent via ! and not in parallel to a group via @
3839          *
3840          * @param int $uri_id
3841          *
3842          * @return boolean "true" when it is a group post
3843          */
3844         public static function isGroupPost(int $uri_id): bool
3845         {
3846                 if (Post::exists(['private' => Item::PUBLIC, 'uri-id' => $uri_id])) {
3847                         return false;
3848                 }
3849
3850                 foreach (Tag::getByURIId($uri_id, [Tag::EXCLUSIVE_MENTION, Tag::AUDIENCE]) as $tag) {
3851                         // @todo Possibly check for a public audience in the future, see https://socialhub.activitypub.rocks/t/fep-1b12-group-federation/2724
3852                         // and https://codeberg.org/fediverse/fep/src/branch/main/feps/fep-1b12.md
3853                         if (DBA::exists('contact', ['uid' => 0, 'nurl' => Strings::normaliseLink($tag['url']), 'contact-type' => Contact::TYPE_COMMUNITY])) {
3854                                 return true;
3855                         }
3856                 }
3857                 return false;
3858         }
3859
3860         /**
3861          * Search item id for given URI or plink
3862          *
3863          * @param string $uri
3864          * @param integer $uid
3865          *
3866          * @return integer item id
3867          */
3868         public static function searchByLink(string $uri, int $uid = 0): int
3869         {
3870                 $ssl_uri = str_replace('http://', 'https://', $uri);
3871                 $uris = [$uri, $ssl_uri, Strings::normaliseLink($uri)];
3872
3873                 $item = Post::selectFirst(['id'], ['uri' => $uris, 'uid' => $uid]);
3874                 if (DBA::isResult($item)) {
3875                         return $item['id'];
3876                 }
3877
3878                 $item = Post::selectFirst(['id'], ['plink' => $uris, 'uid' => $uid]);
3879                 if (DBA::isResult($item)) {
3880                         return $item['id'];
3881                 }
3882
3883                 return 0;
3884         }
3885
3886         /**
3887          * Return the URI for a link to the post
3888          *
3889          * @param string $uri URI or link to post
3890          *
3891          * @return string URI
3892          */
3893         public static function getURIByLink(string $uri): string
3894         {
3895                 $ssl_uri = str_replace('http://', 'https://', $uri);
3896                 $uris = [$uri, $ssl_uri, Strings::normaliseLink($uri)];
3897
3898                 $item = Post::selectFirst(['uri'], ['uri' => $uris]);
3899                 if (DBA::isResult($item)) {
3900                         return $item['uri'];
3901                 }
3902
3903                 $item = Post::selectFirst(['uri'], ['plink' => $uris]);
3904                 if (DBA::isResult($item)) {
3905                         return $item['uri'];
3906                 }
3907
3908                 return '';
3909         }
3910
3911         /**
3912          * Fetches item for given URI or plink
3913          *
3914          * @param string $uri
3915          * @param int    $uid
3916          * @param int    $completion
3917          *
3918          * @return integer item id
3919          */
3920         public static function fetchByLink(string $uri, int $uid = 0, int $completion = ActivityPub\Receiver::COMPLETION_MANUAL): int
3921         {
3922                 Logger::info('Trying to fetch link', ['uid' => $uid, 'uri' => $uri]);
3923                 $item_id = self::searchByLink($uri, $uid);
3924                 if (!empty($item_id)) {
3925                         Logger::info('Link found', ['uid' => $uid, 'uri' => $uri, 'id' => $item_id]);
3926                         return $item_id;
3927                 }
3928
3929                 $hookData = [
3930                         'uri'     => $uri,
3931                         'uid'     => $uid,
3932                         'item_id' => null,
3933                 ];
3934
3935                 Hook::callAll('item_by_link', $hookData);
3936
3937                 if (isset($hookData['item_id'])) {
3938                         return is_numeric($hookData['item_id']) ? $hookData['item_id'] : 0;
3939                 }
3940
3941                 $fetched_uri = ActivityPub\Processor::fetchMissingActivity($uri, [], '', $completion, $uid);
3942
3943                 if ($fetched_uri) {
3944                         $item_id = self::searchByLink($fetched_uri, $uid);
3945                 } else {
3946                         $item_id = Diaspora::fetchByURL($uri);
3947                 }
3948
3949                 if (!empty($item_id)) {
3950                         Logger::info('Link fetched', ['uid' => $uid, 'uri' => $uri, 'id' => $item_id]);
3951                         return $item_id;
3952                 }
3953
3954                 Logger::info('Link not found', ['uid' => $uid, 'uri' => $uri]);
3955                 return 0;
3956         }
3957
3958         /**
3959          * Fetch the uri-id of a quote
3960          *
3961          * @param string $body
3962          * @return integer
3963          */
3964         public static function getQuoteUriId(string $body, int $uid = 0): int
3965         {
3966                 $shared = BBCode::fetchShareAttributes($body);
3967                 if (empty($shared['guid']) && empty($shared['message_id'])) {
3968                         return 0;
3969                 }
3970
3971                 if (empty($shared['link']) && empty($shared['message_id'])) {
3972                         Logger::notice('Invalid share block.', ['share' => $shared]);
3973                         return 0;
3974                 }
3975
3976                 if (!empty($shared['guid'])) {
3977                         $shared_item = Post::selectFirst(['uri-id'], ['guid' => $shared['guid'], 'uid' => [0, $uid]]);
3978                         if (!empty($shared_item['uri-id'])) {
3979                                 Logger::debug('Found post by guid', ['guid' => $shared['guid'], 'uid' => $uid]);
3980                                 return $shared_item['uri-id'];
3981                         }
3982                 }
3983
3984                 if (!empty($shared['message_id'])) {
3985                         $shared_item = Post::selectFirst(['uri-id'], ['uri' => $shared['message_id'], 'uid' => [0, $uid]]);
3986                         if (!empty($shared_item['uri-id'])) {
3987                                 Logger::debug('Found post by message_id', ['message_id' => $shared['message_id'], 'uid' => $uid]);
3988                                 return $shared_item['uri-id'];
3989                         }
3990                 }
3991
3992                 if (!empty($shared['link'])) {
3993                         $shared_item = Post::selectFirst(['uri-id'], ['plink' => $shared['link'], 'uid' => [0, $uid]]);
3994                         if (!empty($shared_item['uri-id'])) {
3995                                 Logger::debug('Found post by link', ['link' => $shared['link'], 'uid' => $uid]);
3996                                 return $shared_item['uri-id'];
3997                         }
3998                 }
3999
4000                 $url = $shared['message_id'] ?: $shared['link'];
4001                 $id = self::fetchByLink($url, 0, ActivityPub\Receiver::COMPLETION_ASYNC);
4002                 if (!$id) {
4003                         Logger::notice('Post could not be fetched.', ['url' => $url, 'uid' => $uid]);
4004                         return 0;
4005                 }
4006
4007                 $shared_item = Post::selectFirst(['uri-id'], ['id' => $id]);
4008                 if (!empty($shared_item['uri-id'])) {
4009                         Logger::debug('Fetched shared post', ['id' => $id, 'url' => $url, 'uid' => $uid]);
4010                         return $shared_item['uri-id'];
4011                 }
4012
4013                 Logger::warning('Post does not exist although it was supposed to had been fetched.', ['id' => $id, 'url' => $url, 'uid' => $uid]);
4014                 return 0;
4015         }
4016 }