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', 'language', '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                                 // Don't store the permissions on pure AP posts
1046                                 $store_permissions = ($item['network'] != Protocol::ACTIVITYPUB) || $item['origin'] || !empty($item['diaspora_signed_text']);
1047                                 $item['allow_cid'] = $store_permissions ? $toplevel_parent['allow_cid'] : '';
1048                                 $item['allow_gid'] = $store_permissions ? $toplevel_parent['allow_gid'] : '';
1049                                 $item['deny_cid']  = $store_permissions ? $toplevel_parent['deny_cid'] : '';
1050                                 $item['deny_gid']  = $store_permissions ? $toplevel_parent['deny_gid'] : '';
1051                         }
1052
1053                         $parent_origin         = $toplevel_parent['origin'];
1054
1055                         // Don't federate received participation messages
1056                         if ($item['verb'] != Activity::FOLLOW) {
1057                                 $item['wall'] = $toplevel_parent['wall'];
1058                         } else {
1059                                 $item['wall'] = false;
1060                                 // Participations are technical messages, so they are set to "seen" automatically
1061                                 $item['unseen'] = false;
1062                         }
1063
1064                         /*
1065                          * If the parent is private, force privacy for the entire conversation
1066                          * This differs from the above settings as it subtly allows comments from
1067                          * email correspondents to be private even if the overall thread is not.
1068                          */
1069                         if (!$defined_permissions && $toplevel_parent['private']) {
1070                                 $item['private'] = $toplevel_parent['private'];
1071                         }
1072
1073                         // If its a post that originated here then tag the thread as "mention"
1074                         if ($item['origin'] && $item['uid']) {
1075                                 DBA::update('post-thread-user', ['mention' => true], ['uri-id' => $item['parent-uri-id'], 'uid' => $item['uid']]);
1076                                 Logger::info('tagged thread as mention', ['parent' => $parent_id, 'parent-uri-id' => $item['parent-uri-id'], 'uid' => $item['uid']]);
1077                         }
1078
1079                         // Update the contact relations
1080                         Contact\Relation::store($toplevel_parent['author-id'], $item['author-id'], $item['created']);
1081                 } else {
1082                         $parent_id = 0;
1083                         $parent_origin = $item['origin'];
1084
1085                         if ($item['wall'] && empty($item['conversation'])) {
1086                                 $item['conversation'] = $item['parent-uri'] . '#context';
1087                         }
1088                 }
1089
1090                 if ($item['origin']) {
1091                         if (
1092                                 Photo::setPermissionFromBody($item['body'], $item['uid'], $item['contact-id'], $item['allow_cid'], $item['allow_gid'], $item['deny_cid'], $item['deny_gid'])
1093                                 && ($item['object-type'] != Activity\ObjectType::EVENT)
1094                         ) {
1095                                 $item['object-type'] = Activity\ObjectType::IMAGE;
1096                         }
1097
1098                         $item = DI::contentItem()->moveAttachmentsFromBodyToAttach($item);
1099                 }
1100
1101                 $item['parent-uri-id'] = ItemURI::getIdByURI($item['parent-uri']);
1102                 $item['thr-parent-id'] = ItemURI::getIdByURI($item['thr-parent']);
1103
1104                 if (!empty($item['conversation']) && empty($item['conversation-id'])) {
1105                         $item['conversation-id'] = ItemURI::getIdByURI($item['conversation']);
1106                 }
1107
1108                 // Is this item available in the global items (with uid=0)?
1109                 if ($item['uid'] == 0) {
1110                         $item['global'] = true;
1111
1112                         // Set the global flag on all items if this was a global item entry
1113                         Post::update(['global' => true], ['uri-id' => $item['uri-id']]);
1114                 } else {
1115                         $item['global'] = Post::exists(['uid' => 0, 'uri-id' => $item['uri-id']]);
1116                 }
1117
1118                 // ACL settings
1119                 if (!$defined_permissions && !empty($item['allow_cid'] . $item['allow_gid'] . $item['deny_cid'] . $item['deny_gid'])) {
1120                         $item['private'] = self::PRIVATE;
1121                 }
1122
1123                 if ($notify && $post_local) {
1124                         $item['edit'] = false;
1125                         $item['parent'] = $parent_id;
1126
1127                         // Trigger automatic reactions for addons
1128                         if (!isset($item['api_source'])) {
1129                                 $item['api_source'] = true;
1130                         }
1131
1132                         // We have to tell the hooks who we are - this really should be improved
1133                         if (!DI::userSession()->getLocalUserId()) {
1134                                 $_SESSION['authenticated'] = true;
1135                                 $_SESSION['uid'] = $uid;
1136                                 $dummy_session = true;
1137                         } else {
1138                                 $dummy_session = false;
1139                         }
1140
1141                         Hook::callAll('post_local', $item);
1142
1143                         if ($dummy_session) {
1144                                 unset($_SESSION['authenticated']);
1145                                 unset($_SESSION['uid']);
1146                         }
1147                 } elseif (!$notify) {
1148                         Hook::callAll('post_remote', $item);
1149                 }
1150
1151                 if (!empty($item['cancel'])) {
1152                         Logger::notice('post cancelled by addon.');
1153                         return 0;
1154                 }
1155
1156                 if (empty($item['vid']) && !empty($item['verb'])) {
1157                         $item['vid'] = Verb::getID($item['verb']);
1158                 }
1159
1160                 // Creates or assigns the permission set
1161                 $item['psid'] = DI::permissionSet()->selectOrCreate(
1162                         DI::permissionSetFactory()->createFromString(
1163                                 $item['uid'],
1164                                 $item['allow_cid'],
1165                                 $item['allow_gid'],
1166                                 $item['deny_cid'],
1167                                 $item['deny_gid']
1168                         )
1169                 )->id;
1170
1171                 if (!empty($item['extid'])) {
1172                         $item['external-id'] = ItemURI::getIdByURI($item['extid']);
1173                 }
1174
1175                 if ($item['verb'] == Activity::ANNOUNCE) {
1176                         self::setOwnerforResharedItem($item);
1177                 }
1178
1179                 if (isset($item['attachments'])) {
1180                         foreach ($item['attachments'] as $attachment) {
1181                                 $attachment['uri-id'] = $item['uri-id'];
1182                                 Post\Media::insert($attachment);
1183                         }
1184                         unset($item['attachments']);
1185                 }
1186
1187                 if (empty($item['quote-uri-id'])) {
1188                         $quote_id = self::getQuoteUriId($item['body']);
1189                         if (!empty($quote_id)) {
1190                                 // This is one of these "should not happen" situations.
1191                                 // The protocol implementations should already have done this job.
1192                                 Logger::notice('Quote-uri-id detected in post', ['id' => $quote_id, 'guid' => $item['guid'], 'uri-id' => $item['uri-id']]);
1193                                 $item['quote-uri-id'] = $quote_id;
1194                         }
1195                 }
1196
1197                 if (!empty($item['quote-uri-id']) && ($item['quote-uri-id'] == $item['uri-id'])) {
1198                         Logger::info('Quote-Uri-Id is identical to Uri-Id', ['uri-id' => $item['uri-id'], 'guid' => $item['guid']]);
1199                         unset($item['quote-uri-id']);
1200                 }
1201
1202                 if (!empty($item['quote-uri-id'])) {
1203                         $item['raw-body'] = BBCode::removeSharedData($item['raw-body']);
1204                         $item['body']     = BBCode::removeSharedData($item['body']);
1205                 }
1206
1207                 // Remove all media attachments from the body and store them in the post-media table
1208                 $item['raw-body'] = Post\Media::insertFromBody($item['uri-id'], $item['raw-body']);
1209                 $item['raw-body'] = self::setHashtags($item['raw-body']);
1210
1211                 $author = Contact::getById($item['author-id'], ['network']);
1212                 Post\Media::insertFromRelevantUrl($item['uri-id'], $item['raw-body'], $item['body'], $author['network'] ?? '');
1213
1214                 Post\Media::insertFromAttachmentData($item['uri-id'], $item['body']);
1215                 $item['body']     = BBCode::removeAttachment($item['body']);
1216                 $item['raw-body'] = BBCode::removeAttachment($item['raw-body']);
1217
1218                 // Check for hashtags in the body and repair or add hashtag links
1219                 $item['body'] = self::setHashtags($item['body']);
1220
1221                 $notify_type = Delivery::POST;
1222
1223                 // Filling item related side tables
1224                 if (!empty($item['attach'])) {
1225                         Post\Media::insertFromAttachment($item['uri-id'], $item['attach']);
1226                 }
1227
1228                 if (empty($item['event-id'])) {
1229                         unset($item['event-id']);
1230
1231                         $ev = Event::fromBBCode($item['body']);
1232                         if ((!empty($ev['desc']) || !empty($ev['summary'])) && !empty($ev['start'])) {
1233                                 Logger::info('Event found.');
1234                                 $ev['cid']       = $item['contact-id'];
1235                                 $ev['uid']       = $item['uid'];
1236                                 $ev['uri']       = $item['uri'];
1237                                 $ev['edited']    = $item['edited'];
1238                                 $ev['private']   = $item['private'];
1239                                 $ev['guid']      = $item['guid'];
1240                                 $ev['plink']     = $item['plink'];
1241                                 $ev['network']   = $item['network'];
1242                                 $ev['protocol']  = $item['protocol'] ?? Conversation::PARCEL_UNKNOWN;
1243                                 $ev['direction'] = $item['direction'] ?? Conversation::UNKNOWN;
1244                                 $ev['source']    = $item['source'] ?? '';
1245
1246                                 $event = DBA::selectFirst('event', ['id'], ['uri' => $item['uri'], 'uid' => $item['uid']]);
1247                                 if (DBA::isResult($event)) {
1248                                         $ev['id'] = $event['id'];
1249                                 }
1250
1251                                 $event_id = Event::store($ev);
1252                                 $item = Event::getItemArrayForImportedId($event_id, $item);
1253
1254                                 Logger::info('Event was stored', ['id' => $event_id]);
1255                         }
1256                 }
1257
1258                 if (empty($item['causer-id'])) {
1259                         unset($item['causer-id']);
1260                 }
1261
1262                 if (in_array($item['network'], [Protocol::ACTIVITYPUB, Protocol::DFRN])) {
1263                         $content_warning = BBCode::getAbstract($item['body'], Protocol::ACTIVITYPUB);
1264                         if (!empty($content_warning) && empty($item['content-warning'])) {
1265                                 $item['content-warning'] = BBCode::toPlaintext($content_warning);
1266                         }
1267                 }
1268
1269                 $item['language'] = self::getLanguage($item);
1270
1271                 $inserted = Post::insert($item['uri-id'], $item);
1272
1273                 if ($item['gravity'] == self::GRAVITY_PARENT) {
1274                         Post\Thread::insert($item['uri-id'], $item);
1275                 }
1276
1277                 // The content of activities normally doesn't matter - except for likes from Misskey
1278                 if (!in_array($item['verb'], self::ACTIVITIES) || in_array($item['verb'], [Activity::LIKE, Activity::DISLIKE]) && !empty($item['body']) && (mb_strlen($item['body']) == 1)) {
1279                         Post\Content::insert($item['uri-id'], $item);
1280                 }
1281
1282                 $item['parent'] = $parent_id;
1283
1284                 // Create Diaspora signature
1285                 if ($item['origin'] && empty($item['diaspora_signed_text']) && ($item['gravity'] != self::GRAVITY_PARENT)) {
1286                         $signed = Diaspora::createCommentSignature($item);
1287                         if (!empty($signed)) {
1288                                 $item['diaspora_signed_text'] = json_encode($signed);
1289                         }
1290                 }
1291
1292                 if (!empty($item['diaspora_signed_text'])) {
1293                         DBA::replace('diaspora-interaction', ['uri-id' => $item['uri-id'], 'interaction' => $item['diaspora_signed_text']]);
1294                 }
1295
1296                 // Attached file links
1297                 if (!empty($item['file'])) {
1298                         Post\Category::storeTextByURIId($item['uri-id'], $item['uid'], $item['file']);
1299                 }
1300
1301                 // Delivery relevant data
1302                 $delivery_data = Post\DeliveryData::extractFields($item);
1303
1304                 if (!empty($item['origin']) || !empty($item['wall']) || !empty($delivery_data['postopts']) || !empty($delivery_data['inform'])) {
1305                         Post\DeliveryData::insert($item['uri-id'], $delivery_data);
1306                 }
1307
1308                 // Store tags from the body if this hadn't been handled previously in the protocol classes
1309                 if (!Tag::existsForPost($item['uri-id'])) {
1310                         Tag::storeFromBody($item['uri-id'], $item['body']);
1311                 }
1312
1313                 $condition = ['uri-id' => $item['uri-id'], 'uid' => $item['uid']];
1314                 if (Post::exists($condition)) {
1315                         Logger::notice('Item is already inserted - aborting', $condition);
1316                         return 0;
1317                 }
1318
1319                 $post_user_id = Post\User::insert($item['uri-id'], $item['uid'], $item);
1320                 if (!$post_user_id) {
1321                         Logger::notice('Post-User is already inserted - aborting', ['uid' => $item['uid'], 'uri-id' => $item['uri-id']]);
1322                         return 0;
1323                 }
1324
1325                 if ($item['gravity'] == self::GRAVITY_PARENT) {
1326                         $item['post-user-id'] = $post_user_id;
1327                         Post\ThreadUser::insert($item['uri-id'], $item['uid'], $item);
1328                 }
1329
1330                 Logger::notice('created item', ['post-id' => $post_user_id, 'uid' => $item['uid'], 'network' => $item['network'], 'uri-id' => $item['uri-id'], 'guid' => $item['guid']]);
1331
1332                 $posted_item = Post::selectFirst(self::ITEM_FIELDLIST, ['post-user-id' => $post_user_id]);
1333                 if (!DBA::isResult($posted_item)) {
1334                         // On failure store the data into a spool file so that the "SpoolPost" worker can try again later.
1335                         Logger::warning('Could not store item. it will be spooled', ['id' => $post_user_id]);
1336                         self::spool($orig_item);
1337                         return 0;
1338                 }
1339
1340                 // update the commented timestamp on the parent
1341                 if (DI::config()->get('system', 'like_no_comment')) {
1342                         // Update when it is a comment
1343                         $update_commented = in_array($posted_item['gravity'], [self::GRAVITY_PARENT, self::GRAVITY_COMMENT]);
1344                 } else {
1345                         // Update when it isn't a follow or tag verb
1346                         $update_commented = !in_array($posted_item['verb'], [Activity::FOLLOW, Activity::TAG]);
1347                 }
1348
1349                 if ($update_commented) {
1350                         $fields = ['commented' => DateTimeFormat::utcNow(), 'changed' => DateTimeFormat::utcNow()];
1351                 } else {
1352                         $fields = ['changed' => DateTimeFormat::utcNow()];
1353                 }
1354
1355                 Post::update($fields, ['uri-id' => $posted_item['parent-uri-id'], 'uid' => $posted_item['uid']]);
1356
1357                 // In that function we check if this is a group post. Additionally we delete the item under certain circumstances
1358                 if (self::tagDeliver($posted_item['uid'], $post_user_id)) {
1359                         // Get the user information for the logging
1360                         $user = User::getById($uid);
1361
1362                         Logger::notice('Item had been deleted', ['id' => $post_user_id, 'user' => $uid, 'account-type' => $user['account-type']]);
1363                         return 0;
1364                 }
1365
1366                 if ($notify) {
1367                         DI::contentItem()->postProcessPost($posted_item);
1368                         if ($copy_permissions && ($posted_item['thr-parent-id'] != $posted_item['uri-id']) && ($posted_item['private'] == self::PRIVATE)) {
1369                                 DI::contentItem()->copyPermissions($posted_item['thr-parent-id'], $posted_item['uri-id']);
1370                         }
1371                 } else {
1372                         Hook::callAll('post_remote_end', $posted_item);
1373                 }
1374
1375                 if ($posted_item['gravity'] === self::GRAVITY_PARENT) {
1376                         self::addShadow($post_user_id);
1377                 } else {
1378                         self::addShadowPost($post_user_id);
1379                 }
1380
1381                 self::updateContact($posted_item);
1382
1383                 Post\UserNotification::setNotification($posted_item['uri-id'], $posted_item['uid']);
1384
1385                 // Distribute items to users who subscribed to their tags
1386                 self::distributeByTags($posted_item);
1387
1388                 // Automatically reshare the item if the "remote_self" option is selected
1389                 self::autoReshare($posted_item);
1390
1391                 $transmit = $notify || ($posted_item['visible'] && ($parent_origin || $posted_item['origin']));
1392
1393                 if ($transmit) {
1394                         if ($posted_item['uid'] && Contact\User::isBlocked($posted_item['author-id'], $posted_item['uid'])) {
1395                                 Logger::info('Message from blocked author will not be relayed', ['item' => $posted_item['id'], 'uri' => $posted_item['uri'], 'cid' => $posted_item['author-id']]);
1396                                 $transmit = false;
1397                         }
1398                         if ($transmit && $posted_item['uid'] && Contact\User::isBlocked($posted_item['owner-id'], $posted_item['uid'])) {
1399                                 Logger::info('Message from blocked owner will not be relayed', ['item' => $posted_item['id'], 'uri' => $posted_item['uri'], 'cid' => $posted_item['owner-id']]);
1400                                 $transmit = false;
1401                         }
1402                         if ($transmit && !empty($posted_item['causer-id']) && $posted_item['uid'] && Contact\User::isBlocked($posted_item['causer-id'], $posted_item['uid'])) {
1403                                 Logger::info('Message from blocked causer will not be relayed', ['item' => $posted_item['id'], 'uri' => $posted_item['uri'], 'cid' => $posted_item['causer-id']]);
1404                                 $transmit = false;
1405                         }
1406
1407                         // Don't relay participation messages
1408                         if (($posted_item['verb'] == Activity::FOLLOW) &&
1409                                 (!$posted_item['origin'] || ($posted_item['author-id'] != Contact::getPublicIdByUserId($uid)))
1410                         ) {
1411                                 Logger::info('Participation messages will not be relayed', ['item' => $posted_item['id'], 'uri' => $posted_item['uri'], 'verb' => $posted_item['verb']]);
1412                                 $transmit = false;
1413                         }
1414                 }
1415
1416                 if (!empty($source) && ($transmit || DI::config()->get('debug', 'store_source'))) {
1417                         Post\Activity::insert($posted_item['uri-id'], $source);
1418                 }
1419
1420                 if ($transmit) {
1421                         ActivityPub\Transmitter::storeReceiversForItem($posted_item);
1422
1423                         Worker::add(['priority' => $priority, 'dont_fork' => true], 'Notifier', $notify_type, (int)$posted_item['uri-id'], (int)$posted_item['uid']);
1424                 }
1425
1426                 // Fill the cache with the rendered content.
1427                 if (in_array($posted_item['gravity'], [self::GRAVITY_PARENT, self::GRAVITY_COMMENT]) && ($posted_item['uid'] == 0)) {
1428                         self::updateDisplayCache($posted_item['uri-id']);
1429                 }
1430
1431                 if ($inserted) {
1432                         Post\Engagement::storeFromItem($posted_item);
1433                 }
1434
1435                 return $post_user_id;
1436         }
1437
1438         /**
1439          * Fetch the post reason for a given item array
1440          *
1441          * @param array $item
1442          *
1443          * @return integer
1444          */
1445         public static function getPostReason(array $item): int
1446         {
1447                 $actor = ($item['gravity'] == self::GRAVITY_PARENT) ? $item['owner-id'] : $item['author-id'];
1448                 if (empty($item['origin']) && ($item['uid'] != 0) && Contact::isSharing($actor, $item['uid'])) {
1449                         return self::PR_FOLLOWER;
1450                 }
1451
1452                 if (!empty($item['origin']) && empty($item['post-reason'])) {
1453                         return self::PR_LOCAL;
1454                 }
1455
1456                 return $item['post-reason'] ?? self::PR_NONE;
1457         }
1458
1459         /**
1460          * Update the display cache
1461          *
1462          * @param integer $uri_id
1463          * @return void
1464          * @throws InternalServerErrorException
1465          * @throws \ImagickException
1466          */
1467         public static function updateDisplayCache(int $uri_id)
1468         {
1469                 $item = Post::selectFirst(self::DISPLAY_FIELDLIST, ['uri-id' => $uri_id]);
1470                 if (!$item) {
1471                         return;
1472                 }
1473
1474                 self::prepareBody($item, false, false, true);
1475         }
1476
1477         /**
1478          * Change the owner of a parent item if it had been shared by a group
1479          *
1480          * (public) group posts in the new format consist of the regular post by the author
1481          * followed by an announce message sent from the group account.
1482          * Changing the owner helps in grouping group posts.
1483          *
1484          * @param array $item
1485          * @return void
1486          */
1487         private static function setOwnerforResharedItem(array $item)
1488         {
1489                 if ($item['uid'] == 0) {
1490                         return;
1491                 }
1492
1493                 $parent = Post::selectFirst(
1494                         ['id', 'causer-id', 'owner-id', 'author-id', 'author-link', 'origin', 'post-reason'],
1495                         ['uri-id' => $item['thr-parent-id'], 'uid' => $item['uid']]
1496                 );
1497                 if (!DBA::isResult($parent)) {
1498                         Logger::error('Parent not found', ['uri-id' => $item['thr-parent-id'], 'uid' => $item['uid']]);
1499                         return;
1500                 }
1501
1502                 $author = Contact::selectFirst(['url', 'contact-type', 'network'], ['id' => $item['author-id']]);
1503                 if (!DBA::isResult($author)) {
1504                         Logger::error('Author not found', ['id' => $item['author-id']]);
1505                         return;
1506                 }
1507
1508                 $self_contact = Contact::selectFirst(['id'], ['uid' => $item['uid'], 'self' => true]);
1509                 $self = !empty($self_contact) ? $self_contact['id'] : 0;
1510
1511                 $cid = Contact::getIdForURL($author['url'], $item['uid']);
1512                 if (empty($cid) || (!Contact::isSharing($cid, $item['uid']) && ($cid != $self))) {
1513                         Logger::info('The resharer is not a following contact: quit', ['resharer' => $author['url'], 'uid' => $item['uid'], 'cid' => $cid]);
1514                         return;
1515                 }
1516
1517                 if ($author['contact-type'] != Contact::TYPE_COMMUNITY) {
1518                         if ($parent['post-reason'] == self::PR_ANNOUNCEMENT) {
1519                                 Logger::info('The parent is already marked as announced: quit', ['causer' => $parent['causer-id'], 'owner' => $parent['owner-id'], 'author' => $parent['author-id'], 'uid' => $item['uid']]);
1520                                 return;
1521                         }
1522
1523                         if (Contact::isSharing($parent['owner-id'], $item['uid'])) {
1524                                 Logger::info('The resharer is no group: quit', ['resharer' => $item['author-id'], 'owner' => $parent['owner-id'], 'author' => $parent['author-id'], 'uid' => $item['uid']]);
1525                                 return;
1526                         }
1527                 }
1528
1529                 self::update(['post-reason' => self::PR_ANNOUNCEMENT, 'causer-id' => $item['author-id']], ['id' => $parent['id']]);
1530                 Logger::info('Set announcement post-reason', ['uri-id' => $item['uri-id'], 'thr-parent-id' => $item['thr-parent-id'], 'uid' => $item['uid']]);
1531         }
1532
1533         /**
1534          * Distribute the given item to users who subscribed to their tags
1535          *
1536          * @param array $item     Processed item
1537          */
1538         private static function distributeByTags(array $item)
1539         {
1540                 if (($item['uid'] != 0) || ($item['gravity'] != self::GRAVITY_PARENT) || !in_array($item['network'], Protocol::FEDERATED)) {
1541                         return;
1542                 }
1543
1544                 foreach (Tag::getUIDListByURIId($item['uri-id']) as $uid => $tags) {
1545                         $stored = self::storeForUserByUriId($item['uri-id'], $uid, ['post-reason' => self::PR_TAG]);
1546                         Logger::info('Stored item for users', ['uri-id' => $item['uri-id'], 'uid' => $uid, 'stored' => $stored]);
1547                         foreach ($tags as $tag) {
1548                                 $stored = Category::storeFileByURIId($item['uri-id'], $uid, Category::SUBCRIPTION, $tag);
1549                                 Logger::debug('Stored tag subscription for user', ['uri-id' => $item['uri-id'], 'uid' => $uid, $tag, 'stored' => $stored]);
1550                         }
1551                 }
1552         }
1553
1554         /**
1555          * Distributes public items to the receivers
1556          *
1557          * @param integer $itemid      Item ID that should be added
1558          * @param string  $signed_text Original text (for Diaspora signatures), JSON encoded.
1559          * @throws \Exception
1560          */
1561         public static function distribute(int $itemid, string $signed_text = '')
1562         {
1563                 $condition = ["`id` IN (SELECT `parent` FROM `post-user-view` WHERE `id` = ?)", $itemid];
1564                 $parent = Post::selectFirst(['owner-id'], $condition);
1565                 if (!DBA::isResult($parent)) {
1566                         Logger::warning('Item not found', ['condition' => $condition]);
1567                         return;
1568                 }
1569
1570                 // Only distribute public items from native networks
1571                 $condition = [
1572                         'id' => $itemid, 'uid' => 0,
1573                         'network' => array_merge(Protocol::FEDERATED, ['']),
1574                         'visible' => true, 'deleted' => false, 'private' => [self::PUBLIC, self::UNLISTED]
1575                 ];
1576                 $item = Post::selectFirst(array_merge(self::ITEM_FIELDLIST, ['protocol']), $condition);
1577                 if (!DBA::isResult($item)) {
1578                         Logger::warning('Item not found', ['condition' => $condition]);
1579                         return;
1580                 }
1581
1582                 $origin = $item['origin'];
1583
1584                 $users = [];
1585
1586                 /// @todo add a field "pcid" in the contact table that refers to the public contact id.
1587                 $owner = DBA::selectFirst('contact', ['url', 'nurl', 'alias'], ['id' => $parent['owner-id']]);
1588                 if (!DBA::isResult($owner)) {
1589                         return;
1590                 }
1591
1592                 $condition = ['nurl' => $owner['nurl'], 'rel' => [Contact::SHARING, Contact::FRIEND]];
1593                 $contacts = DBA::select('contact', ['uid'], $condition);
1594                 while ($contact = DBA::fetch($contacts)) {
1595                         if ($contact['uid'] == 0) {
1596                                 continue;
1597                         }
1598
1599                         $users[$contact['uid']] = $contact['uid'];
1600                 }
1601                 DBA::close($contacts);
1602
1603                 $condition = ['alias' => $owner['url'], 'rel' => [Contact::SHARING, Contact::FRIEND]];
1604                 $contacts = DBA::select('contact', ['uid'], $condition);
1605                 while ($contact = DBA::fetch($contacts)) {
1606                         if ($contact['uid'] == 0) {
1607                                 continue;
1608                         }
1609
1610                         $users[$contact['uid']] = $contact['uid'];
1611                 }
1612                 DBA::close($contacts);
1613
1614                 if (!empty($owner['alias'])) {
1615                         $condition = ['nurl' => Strings::normaliseLink($owner['alias']), 'rel' => [Contact::SHARING, Contact::FRIEND]];
1616                         $contacts = DBA::select('contact', ['uid'], $condition);
1617                         while ($contact = DBA::fetch($contacts)) {
1618                                 if ($contact['uid'] == 0) {
1619                                         continue;
1620                                 }
1621
1622                                 $users[$contact['uid']] = $contact['uid'];
1623                         }
1624                         DBA::close($contacts);
1625                 }
1626
1627                 $origin_uid = 0;
1628
1629                 if ($item['uri-id'] != $item['parent-uri-id']) {
1630                         $parents = Post::select(['uid', 'origin'], ["`uri-id` = ? AND `uid` != 0", $item['parent-uri-id']]);
1631                         while ($parent = Post::fetch($parents)) {
1632                                 $users[$parent['uid']] = $parent['uid'];
1633                                 if ($parent['origin'] && !$origin) {
1634                                         $origin_uid = $parent['uid'];
1635                                 }
1636                         }
1637                         DBA::close($parents);
1638                 }
1639
1640                 foreach ($users as $uid) {
1641                         if ($origin_uid == $uid) {
1642                                 $item['diaspora_signed_text'] = $signed_text;
1643                         }
1644                         $item['post-reason'] = self::PR_DISTRIBUTE;
1645                         self::storeForUser($item, $uid);
1646                 }
1647         }
1648
1649         /**
1650          * Store a public item defined by their URI-ID for the given users
1651          *
1652          * @param integer $uri_id     URI-ID of the given item
1653          * @param integer $uid        The user that will receive the item entry
1654          * @param array   $fields     Additional fields to be stored
1655          * @param integer $source_uid User id of the source post
1656          * @return integer stored item id
1657          */
1658         public static function storeForUserByUriId(int $uri_id, int $uid, array $fields = [], int $source_uid = 0): int
1659         {
1660                 if ($uid == $source_uid) {
1661                         Logger::warning('target UID must not be be equal to the source UID', ['uri-id' => $uri_id, 'uid' => $uid]);
1662                         return 0;
1663                 }
1664
1665                 $item = Post::selectFirst(array_merge(self::ITEM_FIELDLIST, ['protocol']), ['uri-id' => $uri_id, 'uid' => $source_uid]);
1666                 if (!DBA::isResult($item)) {
1667                         Logger::warning('Item could not be fetched', ['uri-id' => $uri_id, 'uid' => $source_uid]);
1668                         return 0;
1669                 }
1670
1671                 if (($uid != 0) && ($item['gravity'] == self::GRAVITY_PARENT)) {
1672                         $owner = User::getOwnerDataById($uid);
1673                         if (($owner['contact-type'] == User::ACCOUNT_TYPE_COMMUNITY) && !Tag::isMentioned($uri_id, $owner['url'])) {
1674                                 Logger::info('Target user is a group but is not mentioned here, thread will not be stored', ['uid' => $uid, 'uri-id' => $uri_id]);
1675                                 return 0;
1676                         }
1677                 }
1678
1679                 if (($source_uid == 0) && (($item['private'] == self::PRIVATE) || !in_array($item['network'], Protocol::FEDERATED))) {
1680                         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']]);
1681                         return 0;
1682                 }
1683
1684                 $item['post-reason'] = self::PR_STORED;
1685
1686                 $item = array_merge($item, $fields);
1687
1688                 if (($uid != 0) && Contact::isSharing(($item['gravity'] == Item::GRAVITY_PARENT) ? $item['owner-id'] : $item['author-id'], $uid)) {
1689                         $item['post-reason'] = self::PR_FOLLOWER;
1690                 }
1691
1692                 $is_reshare = ($item['gravity'] == self::GRAVITY_ACTIVITY) && ($item['verb'] == Activity::ANNOUNCE);
1693
1694                 if (($uid != 0) && (($item['gravity'] == self::GRAVITY_PARENT) || $is_reshare) &&
1695                         DI::pConfig()->get($uid, 'system', 'accept_only_sharer') == self::COMPLETION_NONE &&
1696                         !in_array($item['post-reason'], [self::PR_FOLLOWER, self::PR_TAG, self::PR_TO, self::PR_CC, self::PR_ACTIVITY, self::PR_AUDIENCE])
1697                 ) {
1698                         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']]);
1699                         return 0;
1700                 }
1701
1702                 $causer = $item['causer-id'] ?: $item['author-id'];
1703
1704                 if (($uri_id != $item['parent-uri-id']) && ($item['gravity'] == self::GRAVITY_COMMENT) && !Post::exists(['uri-id' => $item['parent-uri-id'], 'uid' => $uid])) {
1705                         if (!self::fetchParent($item['parent-uri-id'], $uid, $causer)) {
1706                                 Logger::info('Parent post had not been added', ['uri-id' => $item['parent-uri-id'], 'uid' => $uid, 'causer' => $causer]);
1707                                 return 0;
1708                         }
1709                         Logger::info('Fetched parent post', ['uri-id' => $item['parent-uri-id'], 'uid' => $uid, 'causer' => $causer]);
1710                 } elseif (($uri_id != $item['thr-parent-id']) && $is_reshare && !Post::exists(['uri-id' => $item['thr-parent-id'], 'uid' => $uid])) {
1711                         if (!self::fetchParent($item['thr-parent-id'], $uid, $causer)) {
1712                                 Logger::info('Thread parent had not been added', ['uri-id' => $item['thr-parent-id'], 'uid' => $uid, 'causer' => $causer]);
1713                                 return 0;
1714                         }
1715                         Logger::info('Fetched thread parent', ['uri-id' => $item['thr-parent-id'], 'uid' => $uid, 'causer' => $causer]);
1716                 }
1717
1718                 $stored = self::storeForUser($item, $uid);
1719                 Logger::info('Item stored for user', ['uri-id' => $item['uri-id'], 'uid' => $uid, 'causer' => $causer, 'source-uid' => $source_uid, 'stored' => $stored]);
1720                 return $stored;
1721         }
1722
1723         /**
1724          * Fetch the parent with the given uri-id
1725          *
1726          * @param integer $uri_id
1727          * @param integer $uid
1728          * @param integer $causer
1729          *
1730          * @return integer
1731          */
1732         private static function fetchParent(int $uri_id, int $uid, int $causer): int
1733         {
1734                 // Fetch the origin user for the post
1735                 $origin_uid = self::GetOriginUidForUriId($uri_id, $uid);
1736                 if (is_null($origin_uid)) {
1737                         Logger::info('Origin item was not found', ['uid' => $uid, 'uri-id' => $uri_id]);
1738                         return 0;
1739                 }
1740
1741                 return self::storeForUserByUriId($uri_id, $uid, ['causer-id' => $causer, 'post-reason' => self::PR_FETCHED], $origin_uid);
1742         }
1743
1744         /**
1745          * Returns the origin uid of a post if the given user is allowed to see it.
1746          *
1747          * @param int $uriid
1748          * @param int $uid
1749          * @return int
1750          */
1751         private static function GetOriginUidForUriId(int $uriid, int $uid)
1752         {
1753                 if (Post::exists(['uri-id' => $uriid, 'uid' => $uid])) {
1754                         return $uid;
1755                 }
1756
1757                 $post = Post::selectFirst(['uid', 'allow_cid', 'allow_gid', 'deny_cid', 'deny_gid', 'private'], ['uri-id' => $uriid, 'origin' => true]);
1758                 if (!empty($post)) {
1759                         if (in_array($post['private'], [Item::PUBLIC, Item::UNLISTED])) {
1760                                 return $post['uid'];
1761                         }
1762
1763                         $pcid = Contact::getPublicIdByUserId($uid);
1764                         if (empty($pcid)) {
1765                                 return null;
1766                         }
1767
1768                         foreach (Item::enumeratePermissions($post, true) as $receiver) {
1769                                 if ($receiver == $pcid) {
1770                                         return $post['uid'];
1771                                 }
1772                         }
1773
1774                         return null;
1775                 }
1776
1777                 if (Post::exists(['uri-id' => $uriid, 'uid' => 0])) {
1778                         return 0;
1779                 }
1780
1781                 // When the post belongs to a a group then all group users are allowed to access it
1782                 foreach (Tag::getByURIId($uriid, [Tag::MENTION, Tag::EXCLUSIVE_MENTION]) as $tag) {
1783                         if (DBA::exists('contact', ['uid' => $uid, 'nurl' => Strings::normaliseLink($tag['url']), 'contact-type' => Contact::TYPE_COMMUNITY])) {
1784                                 $target_uid = User::getIdForURL($tag['url']);
1785                                 if (!empty($target_uid)) {
1786                                         return $target_uid;
1787                                 }
1788                         }
1789                 }
1790
1791                 return null;
1792         }
1793
1794         /**
1795          * Store a public item array for the given users
1796          *
1797          * @param array   $item   The item entry that will be stored
1798          * @param integer $uid    The user that will receive the item entry
1799          * @return integer stored item id
1800          * @throws \Exception
1801          */
1802         private static function storeForUser(array $item, int $uid): int
1803         {
1804                 $post = Post::selectFirst(['id'], ['uri-id' => $item['uri-id'], 'uid' => $uid]);
1805                 if (!empty($post['id'])) {
1806                         if (!empty($item['event-id'])) {
1807                                 $event_post = Post::selectFirst(['event-id'], ['uri-id' => $item['uri-id'], 'uid' => $uid]);
1808                                 if (!empty($event_post['event-id'])) {
1809                                         $event = DBA::selectFirst('event', ['edited', 'start', 'finish', 'summary', 'desc', 'location', 'nofinish'], ['id' => $item['event-id']]);
1810                                         if (!empty($event)) {
1811                                                 // We aren't using "Event::store" here, since we don't want to trigger any further action
1812                                                 $ret = DBA::update('event', $event, ['id' => $event_post['event-id']]);
1813                                                 Logger::info('Event updated', ['uid' => $uid, 'source-event' => $item['event-id'], 'target-event' => $event_post['event-id'], 'ret' => $ret]);
1814                                         }
1815                                 }
1816                         }
1817                         Logger::info('Item already exists', ['uri-id' => $item['uri-id'], 'uid' => $uid, 'id' => $post['id']]);
1818                         return $post['id'];
1819                 }
1820
1821                 // Data from the "post-user" table
1822                 unset($item['id']);
1823                 unset($item['mention']);
1824                 unset($item['starred']);
1825                 unset($item['unseen']);
1826                 unset($item['psid']);
1827                 unset($item['pinned']);
1828                 unset($item['ignored']);
1829                 unset($item['pubmail']);
1830                 unset($item['event-id']);
1831                 unset($item['hidden']);
1832                 unset($item['notification-type']);
1833
1834                 // Data from the "post-delivery-data" table
1835                 unset($item['postopts']);
1836                 unset($item['inform']);
1837
1838                 $item['uid'] = $uid;
1839                 $item['origin'] = 0;
1840                 $item['wall'] = 0;
1841
1842                 $notify = false;
1843                 if ($item['gravity'] == self::GRAVITY_PARENT) {
1844                         $contact = DBA::selectFirst('contact', [], ['id' => $item['contact-id'], 'self' => false]);
1845                         if (DBA::isResult($contact)) {
1846                                 $notify = self::isRemoteSelf($contact, $item);
1847                                 $item['wall'] = (bool)$notify;
1848                         }
1849                 }
1850
1851                 $item['contact-id'] = self::contactId($item);
1852                 $distributed = self::insert($item, $notify);
1853
1854                 if (!$distributed) {
1855                         Logger::info("Distributed item wasn't stored", ['uri-id' => $item['uri-id'], 'user' => $uid]);
1856                 } else {
1857                         Logger::info('Distributed item was stored', ['uri-id' => $item['uri-id'], 'user' => $uid, 'stored' => $distributed]);
1858                 }
1859                 return $distributed;
1860         }
1861
1862         /**
1863          * Add a shadow entry for a given item id that is a thread starter
1864          *
1865          * We store every public item entry additionally with the user id "0".
1866          * This is used for the community page and for the search.
1867          * It is planned that in the future we will store public item entries only once.
1868          *
1869          * @param integer $itemid Item ID that should be added
1870          * @throws \Exception
1871          */
1872         private static function addShadow(int $itemid)
1873         {
1874                 $fields = ['uid', 'private', 'visible', 'deleted', 'network', 'uri-id'];
1875                 $condition = ['id' => $itemid, 'gravity' => self::GRAVITY_PARENT];
1876                 $item = Post::selectFirst($fields, $condition);
1877
1878                 if (!DBA::isResult($item)) {
1879                         return;
1880                 }
1881
1882                 // is it already a copy?
1883                 if (($itemid == 0) || ($item['uid'] == 0)) {
1884                         return;
1885                 }
1886
1887                 // Is it a visible public post?
1888                 if (!$item["visible"] || $item["deleted"]  || ($item["private"] == self::PRIVATE)) {
1889                         return;
1890                 }
1891
1892                 // is it an entry from a connector? Only add an entry for natively connected networks
1893                 if (!in_array($item["network"], array_merge(Protocol::FEDERATED, ['']))) {
1894                         return;
1895                 }
1896
1897                 if (Post::exists(['uri-id' => $item['uri-id'], 'uid' => 0])) {
1898                         return;
1899                 }
1900
1901                 $item = Post::selectFirst(array_merge(self::ITEM_FIELDLIST, ['protocol']), ['id' => $itemid]);
1902
1903                 if (DBA::isResult($item)) {
1904                         // Preparing public shadow (removing user specific data)
1905                         $item['uid'] = 0;
1906                         unset($item['id']);
1907                         unset($item['parent']);
1908                         unset($item['wall']);
1909                         unset($item['mention']);
1910                         unset($item['origin']);
1911                         unset($item['starred']);
1912                         unset($item['postopts']);
1913                         unset($item['inform']);
1914                         unset($item['post-reason']);
1915                         if ($item['uri-id'] == $item['parent-uri-id']) {
1916                                 $item['contact-id'] = $item['owner-id'];
1917                         } else {
1918                                 $item['contact-id'] = $item['author-id'];
1919                         }
1920
1921                         $public_shadow = self::insert($item);
1922
1923                         Logger::info('Stored public shadow', ['thread' => $itemid, 'id' => $public_shadow]);
1924                 }
1925         }
1926
1927         /**
1928          * Add a shadow entry for a given item id that is a comment
1929          *
1930          * This function does the same like the function above - but for comments
1931          *
1932          * @param integer $itemid Item ID that should be added
1933          * @throws \Exception
1934          */
1935         private static function addShadowPost(int $itemid)
1936         {
1937                 $item = Post::selectFirst(array_merge(self::ITEM_FIELDLIST, ['protocol']), ['id' => $itemid]);
1938                 if (!DBA::isResult($item)) {
1939                         return;
1940                 }
1941
1942                 // Is it a toplevel post?
1943                 if ($item['gravity'] == self::GRAVITY_PARENT) {
1944                         self::addShadow($itemid);
1945                         return;
1946                 }
1947
1948                 // Is this a shadow entry?
1949                 if ($item['uid'] == 0) {
1950                         return;
1951                 }
1952
1953                 // Is there a shadow parent?
1954                 if (!Post::exists(['uri-id' => $item['parent-uri-id'], 'uid' => 0])) {
1955                         return;
1956                 }
1957
1958                 // Is there already a shadow entry?
1959                 if (Post::exists(['uri-id' => $item['uri-id'], 'uid' => 0])) {
1960                         return;
1961                 }
1962
1963                 // Save "origin" and "parent" state
1964                 $origin = $item['origin'];
1965                 $parent = $item['parent'];
1966
1967                 // Preparing public shadow (removing user specific data)
1968                 $item['uid'] = 0;
1969                 unset($item['id']);
1970                 unset($item['parent']);
1971                 unset($item['wall']);
1972                 unset($item['mention']);
1973                 unset($item['origin']);
1974                 unset($item['starred']);
1975                 unset($item['postopts']);
1976                 unset($item['inform']);
1977                 unset($item['post-reason']);
1978                 $item['contact-id'] = Contact::getIdForURL($item['author-link']);
1979
1980                 $public_shadow = self::insert($item);
1981
1982                 Logger::info('Stored public shadow', ['uri-id' => $item['uri-id'], 'id' => $public_shadow]);
1983
1984                 // If this was a comment to a Diaspora post we don't get our comment back.
1985                 // This means that we have to distribute the comment by ourselves.
1986                 if ($origin && Post::exists(['id' => $parent, 'network' => Protocol::DIASPORA])) {
1987                         self::distribute($public_shadow);
1988                 }
1989         }
1990
1991         /**
1992          * Adds a language specification in a "language" element of given $arr.
1993          * Expects "body" element to exist in $arr.
1994          *
1995          * @param array $item
1996          * @return string detected language
1997          * @throws \Text_LanguageDetect_Exception
1998          */
1999         private static function getLanguage(array $item): string
2000         {
2001                 if (!empty($item['language'])) {
2002                         return $item['language'];
2003                 }
2004
2005                 if (!in_array($item['gravity'], [self::GRAVITY_PARENT, self::GRAVITY_COMMENT]) || empty($item['body'])) {
2006                         return '';
2007                 }
2008
2009                 $languages = self::getLanguageArray($item['title'] . ' ' . ($item['content-warning'] ?? '') . ' ' . $item['body'], 3, $item['uri-id'], $item['author-id']);
2010                 if (empty($languages)) {
2011                         return '';
2012                 }
2013
2014                 return json_encode($languages);
2015         }
2016
2017         /**
2018          * Get a language array from a given text
2019          *
2020          * @param string  $body
2021          * @param integer $count
2022          * @param integer $uri_id
2023          * @param integer $author_id
2024          * @return array
2025          */
2026         public static function getLanguageArray(string $body, int $count, int $uri_id = 0, int $author_id = 0): array
2027         {
2028                 $searchtext = BBCode::toSearchText($body, $uri_id);
2029
2030                 if ((count(explode(' ', $searchtext)) < 10) && (mb_strlen($searchtext) < 30) && $author_id) {
2031                         $author = Contact::selectFirst(['about'], ['id' => $author_id]);
2032                         if (!empty($author['about'])) {
2033                                 $about = BBCode::toSearchText($author['about'], 0);
2034                                 Logger::debug('About field added', ['author' => $author_id, 'body' => $searchtext, 'about' => $about]);
2035                                 $searchtext .= ' ' . $about;
2036                         }
2037                 }
2038
2039                 if (empty($searchtext)) {
2040                         return [];
2041                 }
2042
2043                 $ld = new Language(DI::l10n()->getDetectableLanguages());
2044
2045                 $result = [];
2046
2047                 foreach (self::splitByBlocks($searchtext) as $block) {
2048                         $languages = $ld->detect($block)->close() ?: [];
2049
2050                         $data = [
2051                                 'text'      => $block,
2052                                 'detected'  => $languages,
2053                                 'uri-id'    => $uri_id,
2054                                 'author-id' => $author_id,
2055                         ];
2056                         Hook::callAll('detect_languages', $data);
2057
2058                         foreach ($data['detected'] as $language => $quality) {
2059                                 $result[$language] = max($result[$language] ?? 0, $quality * (strlen($block) / strlen($searchtext)));
2060                         }
2061                 }
2062
2063                 $result = self::compactLanguages($result);
2064
2065                 arsort($result);
2066                 return array_slice($result, 0, $count);
2067         }
2068
2069         /**
2070          * Concert the language code in the detection result to ISO 639-1.
2071          * On duplicates the system uses the higher quality value.
2072          *
2073          * @param array $result
2074          * @return array
2075          */
2076         private static function compactLanguages(array $result): array
2077         {
2078                 $languages = [];
2079                 foreach ($result as $language => $quality) {
2080                         if ($quality == 0) {
2081                                 continue;
2082                         }
2083                         $code = DI::l10n()->toISO6391($language);
2084                         if (empty($languages[$code]) || ($languages[$code] < $quality)) {
2085                                 $languages[$code] = $quality;
2086                         }
2087                 }
2088                 return $languages;
2089         }
2090
2091         /**
2092          * Split a string into different unicode blocks
2093          * Currently the text is split into the latin and the non latin part.
2094          *
2095          * @param string $body
2096          * @return array
2097          */
2098         private static function splitByBlocks(string $body): array
2099         {
2100                 if (!class_exists('IntlChar')) {
2101                         return [$body];
2102                 }
2103
2104                 $blocks         = [];
2105                 $previous_block = 0;
2106
2107                 for ($i = 0; $i < mb_strlen($body); $i++) {
2108                         $character = mb_substr($body, $i, 1);
2109                         $previous  = ($i > 0) ? mb_substr($body, $i - 1, 1) : '';
2110                         $next      = ($i < mb_strlen($body)) ? mb_substr($body, $i + 1, 1) : '';
2111
2112                         if (!\IntlChar::isalpha($character)) {
2113                                 if (($previous != '') && (\IntlChar::isalpha($previous))) {
2114                                         $previous_block = self::getBlockCode($previous);
2115                                 }
2116
2117                                 $block = (($next != '') && \IntlChar::isalpha($next)) ? self::getBlockCode($next) : $previous_block;
2118                                 $blocks[$block] = ($blocks[$block] ?? '') . $character;
2119                         } else {
2120                                 $block = self::getBlockCode($character);
2121                                 $blocks[$block] = ($blocks[$block] ?? '') . $character;
2122                         }
2123                 }
2124
2125                 foreach (array_keys($blocks) as $key) {
2126                         $blocks[$key] = trim($blocks[$key]);
2127                         if (empty($blocks[$key])) {
2128                                 unset($blocks[$key]);
2129                         }
2130                 }
2131
2132                 return array_values($blocks);
2133         }
2134
2135         /**
2136          * returns the block code for the given character
2137          *
2138          * @param string $character
2139          * @return integer 0 = no alpha character (blank, signs, emojis, ...), 1 = latin character, 2 = character in every other language
2140          */
2141         private static function getBlockCode(string $character): int
2142         {
2143                 if (!\IntlChar::isalpha($character)) {
2144                         return 0;
2145                 }
2146                 return self::isLatin($character) ? 1 : 2;
2147         }
2148
2149         /**
2150          * Checks if the given character is in one of the latin code blocks
2151          *
2152          * @param string $character
2153          * @return boolean
2154          */
2155         private static function isLatin(string $character): bool
2156         {
2157                 return in_array(\IntlChar::getBlockCode($character), [
2158                         \IntlChar::BLOCK_CODE_BASIC_LATIN, \IntlChar::BLOCK_CODE_LATIN_1_SUPPLEMENT,
2159                         \IntlChar::BLOCK_CODE_LATIN_EXTENDED_A, \IntlChar::BLOCK_CODE_LATIN_EXTENDED_B,
2160                         \IntlChar::BLOCK_CODE_LATIN_EXTENDED_C, \IntlChar::BLOCK_CODE_LATIN_EXTENDED_D,
2161                         \IntlChar::BLOCK_CODE_LATIN_EXTENDED_E, \IntlChar::BLOCK_CODE_LATIN_EXTENDED_ADDITIONAL
2162                 ]);
2163         }
2164
2165         public static function getLanguageMessage(array $item): string
2166         {
2167                 $iso639 = new \Matriphe\ISO639\ISO639;
2168
2169                 $used_languages = '';
2170                 foreach (json_decode($item['language'], true) as $language => $reliability) {
2171                         $code = DI::l10n()->toISO6391($language);
2172
2173                         $native   = $iso639->nativeByCode1($code);
2174                         $language = $iso639->languageByCode1($code);
2175                         if ($native != $language) {
2176                                 $used_languages .= DI::l10n()->t('%s (%s - %s): %s', $native, $language, $code, number_format($reliability, 5)) . '\n';
2177                         } else {
2178                                 $used_languages .= DI::l10n()->t('%s (%s): %s', $native, $code, number_format($reliability, 5)) . '\n';
2179                         }
2180                 }
2181                 $used_languages = DI::l10n()->t('Detected languages in this post:\n%s', $used_languages);
2182                 return $used_languages;
2183         }
2184
2185         /**
2186          * Creates an unique guid out of a given uri.
2187          * This function is used for messages outside the fediverse (Connector posts, feeds, Mails, ...)
2188          * Posts that are created on this system are using System::createUUID.
2189          * Received ActivityPub posts are using Processor::getGUIDByURL.
2190          *
2191          * @param string      $uri  uri of an item entry
2192          * @param string|null $host hostname for the GUID prefix
2193          * @return string Unique guid
2194          * @throws \Exception
2195          */
2196         public static function guidFromUri(string $uri, string $host = null): string
2197         {
2198                 // Our regular guid routine is using this kind of prefix as well
2199                 // We have to avoid that different routines could accidentally create the same value
2200                 $parsed = parse_url($uri);
2201
2202                 // Remove the scheme to make sure that "https" and "http" doesn't make a difference
2203                 unset($parsed['scheme']);
2204
2205                 $hostPart = $host ?: $parsed['host'] ?? '';
2206                 if (!$hostPart) {
2207                         Logger::warning('Empty host GUID part', ['uri' => $uri, 'host' => $host, 'parsed' => $parsed]);
2208                 }
2209
2210                 // Glue it together to be able to make a hash from it
2211                 if (!empty($parsed)) {
2212                         $host_id = implode('/', $parsed);
2213                 } else {
2214                         $host_id = $uri;
2215                 }
2216
2217                 // Use a mixture of several hashes to provide some GUID like experience
2218                 return hash('crc32', $hostPart) . '-' . hash('joaat', $host_id) . '-' . hash('fnv164', $host_id);
2219         }
2220
2221         /**
2222          * generate an unique URI
2223          *
2224          * @param string $guid An existing GUID (Otherwise it will be generated)
2225          *
2226          * @return string
2227          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
2228          */
2229         public static function newURI(string $guid = ''): string
2230         {
2231                 if ($guid == '') {
2232                         $guid = System::createUUID();
2233                 }
2234
2235                 return DI::baseUrl() . '/objects/' . $guid;
2236         }
2237
2238         /**
2239          * Set "success_update" and "last-item" to the date of the last time we heard from this contact
2240          *
2241          * This can be used to filter for inactive contacts.
2242          * Only do this for public postings to avoid privacy problems, since poco data is public.
2243          * Don't set this value if it isn't from the owner (could be an author that we don't know)
2244          *
2245          * @param array $arr Contains the just posted item record
2246          * @throws \Exception
2247          */
2248         private static function updateContact(array $arr)
2249         {
2250                 // Unarchive the author
2251                 $contact = DBA::selectFirst('contact', [], ['id' => $arr["author-id"]]);
2252                 if (DBA::isResult($contact)) {
2253                         Contact::unmarkForArchival($contact);
2254                 }
2255
2256                 // Unarchive the contact if it's not our own contact
2257                 $contact = DBA::selectFirst('contact', [], ['id' => $arr["contact-id"], 'self' => false]);
2258                 if (DBA::isResult($contact)) {
2259                         Contact::unmarkForArchival($contact);
2260                 }
2261
2262                 /// @todo On private posts we could obfuscate the date
2263                 $update = ($arr['private'] != self::PRIVATE) || in_array($arr['network'], Protocol::FEDERATED);
2264
2265                 // Is it a group? Then we don't care about the rules from above
2266                 if (!$update && in_array($arr["network"], [Protocol::ACTIVITYPUB, Protocol::DFRN]) && ($arr["parent-uri-id"] === $arr["uri-id"])) {
2267                         if (DBA::exists('contact', ['id' => $arr['contact-id'], 'forum' => true])) {
2268                                 $update = true;
2269                         }
2270                 }
2271
2272                 if ($update) {
2273                         // The "self" contact id is used (for example in the connectors) when the contact is unknown
2274                         // So we have to ensure to only update the last item when it had been our own post,
2275                         // or it had been done by a "regular" contact.
2276                         if (!empty($arr['wall'])) {
2277                                 $condition = ['id' => $arr['contact-id']];
2278                         } else {
2279                                 $condition = ['id' => $arr['contact-id'], 'self' => false];
2280                         }
2281                         Contact::update(['failed' => false, 'local-data' => true, 'success_update' => $arr['received'], 'last-item' => $arr['received']], $condition);
2282                 }
2283                 // Now do the same for the system wide contacts with uid=0
2284                 if ($arr['private'] != self::PRIVATE) {
2285                         Contact::update(
2286                                 ['failed' => false, 'local-data' => true, 'success_update' => $arr['received'], 'last-item' => $arr['received']],
2287                                 ['id' => $arr['owner-id']]
2288                         );
2289
2290                         if ($arr['owner-id'] != $arr['author-id']) {
2291                                 Contact::update(
2292                                         ['failed' => false, 'local-data' => true, 'success_update' => $arr['received'], 'last-item' => $arr['received']],
2293                                         ['id' => $arr['author-id']]
2294                                 );
2295                         }
2296                 }
2297         }
2298
2299         public static function setHashtags(string $body): string
2300         {
2301                 $body = BBCode::performWithEscapedTags($body, ['noparse', 'pre', 'code', 'img'], function ($body) {
2302                         $tags = BBCode::getTags($body);
2303
2304                         // No hashtags?
2305                         if (!count($tags)) {
2306                                 return $body;
2307                         }
2308
2309                         // This sorting is important when there are hashtags that are part of other hashtags
2310                         // Otherwise there could be problems with hashtags like #test and #test2
2311                         // Because of this we are sorting from the longest to the shortest tag.
2312                         usort($tags, function ($a, $b) {
2313                                 return strlen($b) <=> strlen($a);
2314                         });
2315
2316                         $URLSearchString = "^\[\]";
2317
2318                         // All hashtags should point to the home server if "local_tags" is activated
2319                         if (DI::config()->get('system', 'local_tags')) {
2320                                 $body = preg_replace(
2321                                         "/#\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",
2322                                         "#[url=" . DI::baseUrl() . "/search?tag=$2]$2[/url]",
2323                                         $body
2324                                 );
2325                         }
2326
2327                         // mask hashtags inside of url, bookmarks and attachments to avoid urls in urls
2328                         $body = preg_replace_callback(
2329                                 "/\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",
2330                                 function ($match) {
2331                                         return ("[url=" . str_replace("#", "&num;", $match[1]) . "]" . str_replace("#", "&num;", $match[2]) . "[/url]");
2332                                 },
2333                                 $body
2334                         );
2335
2336                         $body = preg_replace_callback(
2337                                 "/\[bookmark\=([$URLSearchString]*)\](.*?)\[\/bookmark\]/ism",
2338                                 function ($match) {
2339                                         return ("[bookmark=" . str_replace("#", "&num;", $match[1]) . "]" . str_replace("#", "&num;", $match[2]) . "[/bookmark]");
2340                                 },
2341                                 $body
2342                         );
2343
2344                         $body = preg_replace_callback(
2345                                 "/\[attachment (.*?)\](.*?)\[\/attachment\]/ism",
2346                                 function ($match) {
2347                                         return ("[attachment " . str_replace("#", "&num;", $match[1]) . "]" . $match[2] . "[/attachment]");
2348                                 },
2349                                 $body
2350                         );
2351
2352                         // Repair recursive urls
2353                         $body = preg_replace(
2354                                 "/&num;\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",
2355                                 "&num;$2",
2356                                 $body
2357                         );
2358
2359                         foreach ($tags as $tag) {
2360                                 if ((strpos($tag, '#') !== 0) || strpos($tag, '[url=') || strlen($tag) < 2 || $tag[1] == '#') {
2361                                         continue;
2362                                 }
2363
2364                                 $basetag = str_replace('_', ' ', substr($tag, 1));
2365                                 $newtag = '#[url=' . DI::baseUrl() . '/search?tag=' . $basetag . ']' . $basetag . '[/url]';
2366
2367                                 $body = str_replace($tag, $newtag, $body);
2368                         }
2369
2370                         // Convert back the masked hashtags
2371                         $body = str_replace("&num;", "#", $body);
2372
2373                         return $body;
2374                 });
2375
2376                 return $body;
2377         }
2378
2379         /**
2380          * look for mention tags and setup a second delivery chain for group/community posts if appropriate
2381          *
2382          * @param int $uid
2383          * @param int $item_id
2384          * @return boolean true if item was deleted, else false
2385          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
2386          * @throws \ImagickException
2387          */
2388         private static function tagDeliver(int $uid, int $item_id): bool
2389         {
2390                 $owner = User::getOwnerDataById($uid);
2391                 if (!DBA::isResult($owner)) {
2392                         Logger::warning('User not found, quitting here.', ['uid' => $uid]);
2393                         return false;
2394                 }
2395
2396                 if ($owner['contact-type'] != User::ACCOUNT_TYPE_COMMUNITY) {
2397                         Logger::debug('Owner is no community, quitting here.', ['uid' => $uid, 'id' => $item_id]);
2398                         return false;
2399                 }
2400
2401                 $item = Post::selectFirst(self::ITEM_FIELDLIST, ['id' => $item_id, 'gravity' => [self::GRAVITY_PARENT, self::GRAVITY_COMMENT], 'origin' => false]);
2402                 if (!DBA::isResult($item)) {
2403                         Logger::debug('Post is an activity or origin or not found at all, quitting here.', ['id' => $item_id]);
2404                         return false;
2405                 }
2406
2407                 if ($item['gravity'] == self::GRAVITY_PARENT) {
2408                         if (Tag::isMentioned($item['uri-id'], $owner['url'])) {
2409                                 Logger::info('Mention found in tag.', ['uri' => $item['uri'], 'uid' => $uid, 'id' => $item_id, 'uri-id' => $item['uri-id'], 'guid' => $item['guid']]);
2410                         } else {
2411                                 Logger::info('Top-level post without mention is deleted.', ['uri' => $item['uri'], $uid, 'id' => $item_id, 'uri-id' => $item['uri-id'], 'guid' => $item['guid']]);
2412                                 Post\User::delete(['uri-id' => $item['uri-id'], 'uid' => $item['uid']]);
2413                                 return true;
2414                         }
2415
2416                         $arr = ['item' => $item, 'user' => $owner];
2417
2418                         Hook::callAll('tagged', $arr);
2419                 } else {
2420                         if (Tag::isMentioned($item['parent-uri-id'], $owner['url'])) {
2421                                 Logger::info('Mention found in parent tag.', ['uri' => $item['uri'], 'uid' => $uid, 'id' => $item_id, 'uri-id' => $item['uri-id'], 'guid' => $item['guid']]);
2422                         } else {
2423                                 Logger::debug('No mentions found in parent, quitting here.', ['id' => $item_id, 'uri-id' => $item['uri-id'], 'guid' => $item['guid']]);
2424                                 return false;
2425                         }
2426                 }
2427
2428                 Logger::info('Community post will be distributed', ['uri' => $item['uri'], 'uid' => $uid, 'id' => $item_id, 'uri-id' => $item['uri-id'], 'guid' => $item['guid']]);
2429
2430                 if ($owner['page-flags'] == User::PAGE_FLAGS_PRVGROUP) {
2431                         $allow_cid = '';
2432                         $allow_gid = '<' . Circle::FOLLOWERS . '>';
2433                         $deny_cid  = '';
2434                         $deny_gid  = '';
2435                         self::performActivity($item['id'], 'announce', $uid, $allow_cid, $allow_gid, $deny_cid, $deny_gid);
2436                 } else {
2437                         self::performActivity($item['id'], 'announce', $uid);
2438                 }
2439
2440                 Logger::info('Community post had been distributed', ['uri' => $item['uri'], 'uid' => $uid, 'id' => $item_id, 'uri-id' => $item['uri-id'], 'guid' => $item['guid']]);
2441                 return false;
2442         }
2443
2444         /**
2445          * Automatically reshare the item if the "remote_self" option is selected
2446          *
2447          * @param array $item
2448          * @return void
2449          */
2450         private static function autoReshare(array $item)
2451         {
2452                 if ($item['gravity'] != self::GRAVITY_PARENT) {
2453                         return;
2454                 }
2455
2456                 $cdata = Contact::getPublicAndUserContactID($item['author-id'], $item['uid']);
2457                 if (empty($cdata['user']) || ($cdata['user'] != $item['contact-id'])) {
2458                         return;
2459                 }
2460
2461                 if (!DBA::exists('contact', ['id' => $cdata['user'], 'remote_self' => LocalRelationship::MIRROR_NATIVE_RESHARE])) {
2462                         return;
2463                 }
2464
2465                 if (!in_array($item['network'], [Protocol::ACTIVITYPUB, Protocol::DFRN])) {
2466                         return;
2467                 }
2468
2469                 if (User::getById($item['uid'], ['blocked'])['blocked'] ?? false) {
2470                         return;
2471                 }
2472
2473                 Logger::info('Automatically reshare item', ['uid' => $item['uid'], 'id' => $item['id'], 'guid' => $item['guid'], 'uri-id' => $item['uri-id']]);
2474
2475                 self::performActivity($item['id'], 'announce', $item['uid']);
2476         }
2477
2478         public static function isRemoteSelf(array $contact, array &$datarray): bool
2479         {
2480                 if ($contact['remote_self'] != LocalRelationship::MIRROR_OWN_POST) {
2481                         return false;
2482                 }
2483
2484                 // Prevent the forwarding of posts that are forwarded
2485                 if (!empty($datarray['extid']) && ($datarray['extid'] == Protocol::DFRN)) {
2486                         Logger::info('Already forwarded');
2487                         return false;
2488                 }
2489
2490                 // Prevent to forward already forwarded posts
2491                 if ($datarray['app'] == DI::baseUrl()->getHost()) {
2492                         Logger::info('Already forwarded (second test)');
2493                         return false;
2494                 }
2495
2496                 // Only forward posts
2497                 if ($datarray['verb'] != Activity::POST) {
2498                         Logger::info('No post');
2499                         return false;
2500                 }
2501
2502                 if (($contact['network'] != Protocol::FEED) && ($datarray['private'] == self::PRIVATE)) {
2503                         Logger::info('Not public');
2504                         return false;
2505                 }
2506
2507                 if (User::getById($contact['uid'], ['blocked'])['blocked'] ?? false) {
2508                         Logger::info('User is blocked', ['contact' => $contact]);
2509                         return false;
2510                 }
2511
2512                 $datarray2 = $datarray;
2513                 Logger::info('remote-self start', ['contact' => $contact['url'], 'remote_self' => $contact['remote_self'], 'item' => $datarray]);
2514
2515                 $self = DBA::selectFirst(
2516                         'contact',
2517                         ['id', 'name', 'url', 'thumb'],
2518                         ['uid' => $contact['uid'], 'self' => true]
2519                 );
2520                 if (!DBA::isResult($self)) {
2521                         Logger::error('Self contact not found', ['uid' => $contact['uid']]);
2522                         return false;
2523                 }
2524
2525                 $datarray['contact-id'] = $self['id'];
2526
2527                 $datarray['author-name']   = $datarray['owner-name']   = $self['name'];
2528                 $datarray['author-link']   = $datarray['owner-link']   = $self['url'];
2529                 $datarray['author-avatar'] = $datarray['owner-avatar'] = $self['thumb'];
2530
2531                 unset($datarray['edited']);
2532
2533                 unset($datarray['network']);
2534                 unset($datarray['owner-id']);
2535                 unset($datarray['author-id']);
2536
2537                 if ($contact['network'] != Protocol::FEED) {
2538                         $old_uri_id = $datarray['uri-id'] ?? 0;
2539                         $datarray['guid'] = System::createUUID();
2540                         unset($datarray['plink']);
2541                         $datarray['uri'] = self::newURI($datarray['guid']);
2542                         $datarray['uri-id'] = ItemURI::getIdByURI($datarray['uri']);
2543                         $datarray['extid'] = Protocol::DFRN;
2544                         $urlpart = parse_url($datarray2['author-link']);
2545                         $datarray['app'] = $urlpart['host'];
2546                         if (!empty($old_uri_id)) {
2547                                 Post\Media::copy($old_uri_id, $datarray['uri-id']);
2548                         }
2549
2550                         unset($datarray['parent-uri']);
2551                         unset($datarray['thr-parent']);
2552
2553                         // Store the original post
2554                         $result = self::insert($datarray2);
2555                         Logger::info('remote-self post original item', ['contact' => $contact['url'], 'result' => $result, 'item' => $datarray2]);
2556                 } else {
2557                         $datarray['private'] = self::PUBLIC;
2558                         $datarray['app'] = 'Feed';
2559                         $result = true;
2560                 }
2561
2562                 return (bool)$result;
2563         }
2564
2565         /**
2566          *
2567          * @param string $s
2568          * @param int    $uid
2569          * @param array  $item
2570          * @param int    $cid
2571          * @return string
2572          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
2573          * @throws \ImagickException
2574          */
2575         public static function fixPrivatePhotos(string $s, int $uid, array $item = null, int $cid = 0): string
2576         {
2577                 if (DI::config()->get('system', 'disable_embedded')) {
2578                         return $s;
2579                 }
2580
2581                 Logger::info('check for photos');
2582                 $site = substr(DI::baseUrl(), strpos(DI::baseUrl(), '://'));
2583
2584                 $orig_body = $s;
2585                 $new_body = '';
2586
2587                 $img_start = strpos($orig_body, '[img');
2588                 $img_st_close = ($img_start !== false ? strpos(substr($orig_body, $img_start), ']') : false);
2589                 $img_len = ($img_start !== false ? strpos(substr($orig_body, $img_start + $img_st_close + 1), '[/img]') : false);
2590
2591                 while (($img_st_close !== false) && ($img_len !== false)) {
2592                         $img_st_close++; // make it point to AFTER the closing bracket
2593                         $image = substr($orig_body, $img_start + $img_st_close, $img_len);
2594
2595                         Logger::info('found photo', ['image' => $image]);
2596
2597                         if (stristr($image, $site . '/photo/')) {
2598                                 // Only embed locally hosted photos
2599                                 $replace = false;
2600                                 $i = basename($image);
2601                                 $i = str_replace(['.jpg', '.png', '.gif'], ['', '', ''], $i);
2602                                 $x = strpos($i, '-');
2603
2604                                 if ($x) {
2605                                         $res = substr($i, $x + 1);
2606                                         $i = substr($i, 0, $x);
2607                                         $photo = Photo::getPhotoForUser($uid, $i, $res);
2608                                         if (DBA::isResult($photo)) {
2609                                                 /*
2610                                                  * Check to see if we should replace this photo link with an embedded image
2611                                                  * 1. No need to do so if the photo is public
2612                                                  * 2. If there's a contact-id provided, see if they're in the access list
2613                                                  *    for the photo. If so, embed it.
2614                                                  * 3. Otherwise, if we have an item, see if the item permissions match the photo
2615                                                  *    permissions, regardless of order but first check to see if they're an exact
2616                                                  *    match to save some processing overhead.
2617                                                  */
2618                                                 if (self::hasPermissions($photo)) {
2619                                                         if ($cid) {
2620                                                                 $recips = self::enumeratePermissions($photo);
2621                                                                 if (in_array($cid, $recips)) {
2622                                                                         $replace = true;
2623                                                                 }
2624                                                         } elseif ($item) {
2625                                                                 if (self::samePermissions($uid, $item, $photo)) {
2626                                                                         $replace = true;
2627                                                                 }
2628                                                         }
2629                                                 }
2630                                                 if ($replace) {
2631                                                         $photo_img = Photo::getImageForPhoto($photo);
2632                                                         // If a custom width and height were specified, apply before embedding
2633                                                         if (preg_match("/\[img\=([0-9]*)x([0-9]*)\]/is", substr($orig_body, $img_start, $img_st_close), $match)) {
2634                                                                 Logger::info('scaling photo');
2635
2636                                                                 $width = intval($match[1]);
2637                                                                 $height = intval($match[2]);
2638
2639                                                                 $photo_img->scaleDown(max($width, $height));
2640                                                         }
2641
2642                                                         $data = $photo_img->asString();
2643                                                         $type = $photo_img->getType();
2644
2645                                                         Logger::info('replacing photo');
2646                                                         $image = 'data:' . $type . ';base64,' . base64_encode($data);
2647                                                         Logger::debug('replaced', ['image' => $image]);
2648                                                 }
2649                                         }
2650                                 }
2651                         }
2652
2653                         $new_body = $new_body . substr($orig_body, 0, $img_start + $img_st_close) . $image . '[/img]';
2654                         $orig_body = substr($orig_body, $img_start + $img_st_close + $img_len + strlen('[/img]'));
2655                         if ($orig_body === false) {
2656                                 $orig_body = '';
2657                         }
2658
2659                         $img_start = strpos($orig_body, '[img');
2660                         $img_st_close = ($img_start !== false ? strpos(substr($orig_body, $img_start), ']') : false);
2661                         $img_len = ($img_start !== false ? strpos(substr($orig_body, $img_start + $img_st_close + 1), '[/img]') : false);
2662                 }
2663
2664                 $new_body = $new_body . $orig_body;
2665
2666                 return $new_body;
2667         }
2668
2669         private static function hasPermissions(array $obj)
2670         {
2671                 return !empty($obj['allow_cid']) || !empty($obj['allow_gid']) ||
2672                         !empty($obj['deny_cid']) || !empty($obj['deny_gid']);
2673         }
2674
2675         // @TODO $uid is unused parameter
2676         private static function samePermissions($uid, array $obj1, array $obj2): bool
2677         {
2678                 // first part is easy. Check that these are exactly the same.
2679                 if (($obj1['allow_cid'] == $obj2['allow_cid'])
2680                         && ($obj1['allow_gid'] == $obj2['allow_gid'])
2681                         && ($obj1['deny_cid'] == $obj2['deny_cid'])
2682                         && ($obj1['deny_gid'] == $obj2['deny_gid'])
2683                 ) {
2684                         return true;
2685                 }
2686
2687                 // This is harder. Parse all the permissions and compare the resulting set.
2688                 $recipients1 = self::enumeratePermissions($obj1);
2689                 $recipients2 = self::enumeratePermissions($obj2);
2690                 sort($recipients1);
2691                 sort($recipients2);
2692
2693                 /// @TODO Comparison of arrays, maybe use array_diff_assoc() here?
2694                 return ($recipients1 == $recipients2);
2695         }
2696
2697         /**
2698          * Returns an array of contact-ids that are allowed to see this object
2699          *
2700          * @param array $obj              Item array with at least uid, allow_cid, allow_gid, deny_cid and deny_gid
2701          * @param bool  $check_dead       Prunes unavailable contacts from the result
2702          * @param bool  $expand_followers Expand the list of followers
2703          * @return array
2704          * @throws \Exception
2705          */
2706         public static function enumeratePermissions(array $obj, bool $check_dead = false, bool $expand_followers = true): array
2707         {
2708                 $aclFormatter = DI::aclFormatter();
2709
2710                 if (!$expand_followers && (!empty($obj['deny_cid']) || !empty($obj['deny_gid']))) {
2711                         $expand_followers = true;
2712                 }
2713
2714                 $allow_people  = $aclFormatter->expand($obj['allow_cid']);
2715                 $allow_circles = Circle::expand($obj['uid'], $aclFormatter->expand($obj['allow_gid']), $check_dead, $expand_followers);
2716                 $deny_people   = $aclFormatter->expand($obj['deny_cid']);
2717                 $deny_circles  = Circle::expand($obj['uid'], $aclFormatter->expand($obj['deny_gid']), $check_dead);
2718                 $recipients    = array_unique(array_merge($allow_people, $allow_circles));
2719                 $deny          = array_unique(array_merge($deny_people, $deny_circles));
2720                 $recipients    = array_diff($recipients, $deny);
2721                 return $recipients;
2722         }
2723
2724         public static function expire(int $uid, int $days, string $network = "", bool $force = false)
2725         {
2726                 if (!$uid || ($days < 1)) {
2727                         return;
2728                 }
2729
2730                 $condition = [
2731                         "`uid` = ? AND NOT `deleted` AND `gravity` = ?",
2732                         $uid, self::GRAVITY_PARENT
2733                 ];
2734
2735                 /*
2736                  * $expire_network_only = save your own wall posts
2737                  * and just expire conversations started by others
2738                  */
2739                 $expire_network_only = DI::pConfig()->get($uid, 'expire', 'network_only', false);
2740
2741                 if ($expire_network_only) {
2742                         $condition[0] .= " AND NOT `wall`";
2743                 }
2744
2745                 if ($network != "") {
2746                         $condition[0] .= " AND `network` = ?";
2747                         $condition[] = $network;
2748                 }
2749
2750                 $condition[0] .= " AND `received` < ?";
2751                 $condition[] = DateTimeFormat::utc('now - ' . $days . ' day');
2752
2753                 $items = Post::select(['resource-id', 'starred', 'id', 'post-type', 'uid', 'uri-id'], $condition);
2754
2755                 if (!DBA::isResult($items)) {
2756                         return;
2757                 }
2758
2759                 $expire_items = (bool)DI::pConfig()->get($uid, 'expire', 'items', true);
2760
2761                 // Forcing expiring of items - but not notes and marked items
2762                 if ($force) {
2763                         $expire_items = true;
2764                 }
2765
2766                 $expire_notes = (bool)DI::pConfig()->get($uid, 'expire', 'notes', true);
2767                 $expire_starred = (bool)DI::pConfig()->get($uid, 'expire', 'starred', true);
2768                 $expire_photos = (bool)DI::pConfig()->get($uid, 'expire', 'photos', false);
2769
2770                 $expired = 0;
2771
2772                 $priority = DI::config()->get('system', 'expire-notify-priority');
2773
2774                 while ($item = Post::fetch($items)) {
2775                         // don't expire filed items
2776                         if (DBA::exists('post-category', ['uri-id' => $item['uri-id'], 'uid' => $item['uid'], 'type' => Post\Category::FILE])) {
2777                                 continue;
2778                         }
2779
2780                         // Only expire posts, not photos and photo comments
2781
2782                         if (!$expire_photos && !empty($item['resource-id'])) {
2783                                 continue;
2784                         } elseif (!$expire_starred && intval($item['starred'])) {
2785                                 continue;
2786                         } elseif (!$expire_notes && ($item['post-type'] == self::PT_PERSONAL_NOTE)) {
2787                                 continue;
2788                         } elseif (!$expire_items && ($item['post-type'] != self::PT_PERSONAL_NOTE)) {
2789                                 continue;
2790                         }
2791
2792                         self::markForDeletionById($item['id'], $priority);
2793
2794                         ++$expired;
2795                 }
2796                 DBA::close($items);
2797                 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]);
2798         }
2799
2800         public static function firstPostDate(int $uid, bool $wall = false)
2801         {
2802                 $user = User::getById($uid, ['register_date']);
2803                 if (empty($user)) {
2804                         return false;
2805                 }
2806
2807                 $condition = [
2808                         "`uid` = ? AND `wall` = ? AND NOT `deleted` AND `visible` AND `received` >= ?",
2809                         $uid, $wall, $user['register_date']
2810                 ];
2811                 $params = ['order' => ['received' => false]];
2812                 $thread = Post::selectFirstThread(['received'], $condition, $params);
2813                 if (DBA::isResult($thread)) {
2814                         $postdate = substr(DateTimeFormat::local($thread['received']), 0, 10);
2815                         return $postdate;
2816                 }
2817                 return false;
2818         }
2819
2820         /**
2821          * add/remove activity to an item
2822          *
2823          * Toggle activities as like,dislike,attend of an item
2824          *
2825          * @param int    $item_id
2826          * @param string $verb
2827          *            Activity verb. One of
2828          *            like, unlike, dislike, undislike, attendyes, unattendyes,
2829          *            attendno, unattendno, attendmaybe, unattendmaybe,
2830          *            announce, unannounce
2831          * @param int    $uid
2832          * @param string $allow_cid
2833          * @param string $allow_gid
2834          * @param string $deny_cid
2835          * @param string $deny_gid
2836          * @return bool
2837          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
2838          * @throws \ImagickException
2839          * @hook  'post_local_end'
2840          *            array $arr
2841          *            'post_id' => ID of posted item
2842          */
2843         public static function performActivity(int $item_id, string $verb, int $uid, string $allow_cid = null, string $allow_gid = null, string $deny_cid = null, string $deny_gid = null): bool
2844         {
2845                 if (empty($uid)) {
2846                         return false;
2847                 }
2848
2849                 Logger::notice('Start create activity', ['verb' => $verb, 'item' => $item_id, 'user' => $uid]);
2850
2851                 $item = Post::selectFirst(self::ITEM_FIELDLIST, ['id' => $item_id]);
2852                 if (!DBA::isResult($item)) {
2853                         Logger::warning('Post had not been fetched', ['id' => $item_id]);
2854                         return false;
2855                 }
2856
2857                 $uri_id = $item['uri-id'];
2858
2859                 if (!in_array($item['uid'], [0, $uid])) {
2860                         return false;
2861                 }
2862
2863                 if (!Post::exists(['uri-id' => $item['parent-uri-id'], 'uid' => $uid])) {
2864                         $stored = self::storeForUserByUriId($item['parent-uri-id'], $uid, ['post-reason' => Item::PR_ACTIVITY]);
2865                         if (($item['parent-uri-id'] == $item['uri-id']) && !empty($stored)) {
2866                                 $item = Post::selectFirst(self::ITEM_FIELDLIST, ['id' => $stored]);
2867                                 if (!DBA::isResult($item)) {
2868                                         Logger::info('Could not fetch just created item - should not happen', ['stored' => $stored, 'uid' => $uid, 'uri-id' => $uri_id]);
2869                                         return false;
2870                                 }
2871                         }
2872                 }
2873
2874                 // Retrieves the local post owner
2875                 $owner = User::getOwnerDataById($uid);
2876                 if (empty($owner)) {
2877                         Logger::info('Empty owner for user', ['uid' => $uid]);
2878                         return false;
2879                 }
2880
2881                 // Retrieve the current logged in user's public contact
2882                 $author_id = Contact::getPublicIdByUserId($uid);
2883                 if (empty($author_id)) {
2884                         Logger::info('Empty public contact');
2885                         return false;
2886                 }
2887
2888                 $activity = null;
2889                 switch ($verb) {
2890                         case 'like':
2891                         case 'unlike':
2892                                 $activity = Activity::LIKE;
2893                                 break;
2894                         case 'dislike':
2895                         case 'undislike':
2896                                 $activity = Activity::DISLIKE;
2897                                 break;
2898                         case 'attendyes':
2899                         case 'unattendyes':
2900                                 $activity = Activity::ATTEND;
2901                                 break;
2902                         case 'attendno':
2903                         case 'unattendno':
2904                                 $activity = Activity::ATTENDNO;
2905                                 break;
2906                         case 'attendmaybe':
2907                         case 'unattendmaybe':
2908                                 $activity = Activity::ATTENDMAYBE;
2909                                 break;
2910                         case 'follow':
2911                         case 'unfollow':
2912                                 $activity = Activity::FOLLOW;
2913                                 break;
2914                         case 'announce':
2915                         case 'unannounce':
2916                                 $activity = Activity::ANNOUNCE;
2917                                 break;
2918                         default:
2919                                 Logger::warning('unknown verb', ['verb' => $verb, 'item' => $item_id]);
2920                                 return false;
2921                 }
2922
2923                 $mode = Strings::startsWith($verb, 'un') ? 'delete' : 'create';
2924
2925                 // Enable activity toggling instead of on/off
2926                 $event_verb_flag = $activity === Activity::ATTEND || $activity === Activity::ATTENDNO || $activity === Activity::ATTENDMAYBE;
2927
2928                 // Look for an existing verb row
2929                 // Event participation activities are mutually exclusive, only one of them can exist at all times.
2930                 if ($event_verb_flag) {
2931                         $verbs = [Activity::ATTEND, Activity::ATTENDNO, Activity::ATTENDMAYBE];
2932
2933                         // Translate to the index based activity index
2934                         $vids = [];
2935                         foreach ($verbs as $verb) {
2936                                 $vids[] = Verb::getID($verb);
2937                         }
2938                 } else {
2939                         $vids = Verb::getID($activity);
2940                 }
2941
2942                 $condition = [
2943                         'vid' => $vids, 'deleted' => false, 'gravity' => self::GRAVITY_ACTIVITY,
2944                         'author-id' => $author_id, 'uid' => $uid, 'thr-parent-id' => $uri_id
2945                 ];
2946                 $like_item = Post::selectFirst(['id', 'guid', 'verb'], $condition);
2947
2948                 if (DBA::isResult($like_item)) {
2949                         /**
2950                          * Truth table for existing activities
2951                          *
2952                          * |          Inputs            ||      Outputs      |
2953                          * |----------------------------||-------------------|
2954                          * |  Mode  | Event | Same verb || Delete? | Return? |
2955                          * |--------|-------|-----------||---------|---------|
2956                          * | create |  Yes  |    Yes    ||   No    |   Yes   |
2957                          * | create |  Yes  |    No     ||   Yes   |   No    |
2958                          * | create |  No   |    Yes    ||   No    |   Yes   |
2959                          * | create |  No   |    No     ||        N/A†       |
2960                          * | delete |  Yes  |    Yes    ||   Yes   |   N/A‡  |
2961                          * | delete |  Yes  |    No     ||   No    |   N/A‡  |
2962                          * | delete |  No   |    Yes    ||   Yes   |   N/A‡  |
2963                          * | delete |  No   |    No     ||        N/A†       |
2964                          * |--------|-------|-----------||---------|---------|
2965                          * |   A    |   B   |     C     || A xor C | !B or C |
2966                          *
2967                          * † Can't happen: It's impossible to find an existing non-event activity without
2968                          *                 the same verb because we are only looking for this single verb.
2969                          *
2970                          * ‡ The "mode = delete" is returning early whether an existing activity was found or not.
2971                          */
2972                         if ($mode == 'create' xor $like_item['verb'] == $activity) {
2973                                 self::markForDeletionById($like_item['id']);
2974                         }
2975
2976                         if (!$event_verb_flag || $like_item['verb'] == $activity) {
2977                                 return true;
2978                         }
2979                 }
2980
2981                 // No need to go further if we aren't creating anything
2982                 if ($mode == 'delete') {
2983                         return true;
2984                 }
2985
2986                 $objtype = $item['resource-id'] ? Activity\ObjectType::IMAGE : Activity\ObjectType::NOTE;
2987
2988                 $new_item = [
2989                         'guid'          => System::createUUID(),
2990                         'uri'           => self::newURI(),
2991                         'uid'           => $uid,
2992                         'contact-id'    => $owner['id'],
2993                         'wall'          => $item['wall'],
2994                         'origin'        => 1,
2995                         'network'       => Protocol::DFRN,
2996                         'protocol'      => Conversation::PARCEL_DIRECT,
2997                         'direction'     => Conversation::PUSH,
2998                         'gravity'       => self::GRAVITY_ACTIVITY,
2999                         'parent'        => $item['id'],
3000                         'thr-parent'    => $item['uri'],
3001                         'owner-id'      => $author_id,
3002                         'author-id'     => $author_id,
3003                         'body'          => $activity,
3004                         'verb'          => $activity,
3005                         'object-type'   => $objtype,
3006                         'allow_cid'     => $allow_cid ?? $item['allow_cid'],
3007                         'allow_gid'     => $allow_gid ?? $item['allow_gid'],
3008                         'deny_cid'      => $deny_cid ?? $item['deny_cid'],
3009                         'deny_gid'      => $deny_gid ?? $item['deny_gid'],
3010                         'visible'       => 1,
3011                         'unseen'        => 1,
3012                 ];
3013
3014                 if (in_array($activity, [Activity::LIKE, Activity::DISLIKE])) {
3015                         $signed = Diaspora::createLikeSignature($uid, $new_item);
3016                         if (!empty($signed)) {
3017                                 $new_item['diaspora_signed_text'] = json_encode($signed);
3018                         }
3019                 }
3020
3021                 self::insert($new_item, true);
3022
3023                 // If the parent item isn't visible then set it to visible
3024                 // @todo Check if this is still needed
3025                 if (!$item['visible']) {
3026                         self::update(['visible' => true], ['id' => $item['id']]);
3027                 }
3028                 return true;
3029         }
3030
3031         /**
3032          * Fetch the SQL condition for the given user id
3033          *
3034          * @param integer $owner_id User ID for which the permissions should be fetched
3035          * @return array condition
3036          */
3037         public static function getPermissionsConditionArrayByUserId(int $owner_id): array
3038         {
3039                 $local_user = DI::userSession()->getLocalUserId();
3040                 $remote_user = DI::userSession()->getRemoteContactID($owner_id);
3041
3042                 // default permissions - anonymous user
3043                 $condition = ["`private` != ?", self::PRIVATE];
3044
3045                 if ($local_user && ($local_user == $owner_id)) {
3046                         // Profile owner - everything is visible
3047                         $condition = [];
3048                 } elseif ($remote_user) {
3049                         // Authenticated visitor - fetch the matching permissionsets
3050                         $permissionSets = DI::permissionSet()->selectByContactId($remote_user, $owner_id);
3051                         if (!empty($set)) {
3052                                 $condition = [
3053                                         "(`private` != ? OR (`private` = ? AND `wall`
3054                                         AND `psid` IN (" . implode(', ', array_fill(0, count($set), '?')) . ")))",
3055                                         self::PRIVATE, self::PRIVATE
3056                                 ];
3057                                 $condition = array_merge($condition, $permissionSets->column('id'));
3058                         }
3059                 }
3060
3061                 return $condition;
3062         }
3063
3064         /**
3065          * Get a permission SQL string for the given user
3066          *
3067          * @param int $owner_id
3068          * @param string $table
3069          * @return string
3070          */
3071         public static function getPermissionsSQLByUserId(int $owner_id, string $table = ''): string
3072         {
3073                 $local_user = DI::userSession()->getLocalUserId();
3074                 $remote_user = DI::userSession()->getRemoteContactID($owner_id);
3075
3076                 if (!empty($table)) {
3077                         $table = DBA::quoteIdentifier($table) . '.';
3078                 }
3079
3080                 /*
3081                  * Construct permissions
3082                  *
3083                  * default permissions - anonymous user
3084                  */
3085                 $sql = sprintf(" AND " . $table . "`private` != %d", self::PRIVATE);
3086
3087                 // Profile owner - everything is visible
3088                 if ($local_user && ($local_user == $owner_id)) {
3089                         $sql = '';
3090                 } elseif ($remote_user) {
3091                         /*
3092                          * Authenticated visitor. Unless pre-verified,
3093                          * check that the contact belongs to this $owner_id
3094                          * and load the circles the visitor belongs to.
3095                          * If pre-verified, the caller is expected to have already
3096                          * done this and passed the circles into this function.
3097                          */
3098                         $permissionSets = DI::permissionSet()->selectByContactId($remote_user, $owner_id);
3099
3100                         if (!empty($set)) {
3101                                 $sql_set = sprintf(" OR (" . $table . "`private` = %d AND " . $table . "`wall` AND " . $table . "`psid` IN (", self::PRIVATE) . implode(',', $permissionSets->column('id')) . "))";
3102                         } else {
3103                                 $sql_set = '';
3104                         }
3105
3106                         $sql = sprintf(" AND (" . $table . "`private` != %d", self::PRIVATE) . $sql_set . ")";
3107                 }
3108
3109                 return $sql;
3110         }
3111
3112         /**
3113          * get translated item type
3114          *
3115          * @param array                $item
3116          * @param \Friendica\Core\L10n $l10n
3117          * @return string
3118          */
3119         public static function postType(array $item, \Friendica\Core\L10n $l10n): string
3120         {
3121                 if (!empty($item['event-id'])) {
3122                         return $l10n->t('event');
3123                 } elseif (!empty($item['resource-id'])) {
3124                         return $l10n->t('photo');
3125                 } elseif ($item['gravity'] == self::GRAVITY_ACTIVITY) {
3126                         return $l10n->t('activity');
3127                 } elseif ($item['gravity'] == self::GRAVITY_COMMENT) {
3128                         return $l10n->t('comment');
3129                 }
3130
3131                 return $l10n->t('post');
3132         }
3133
3134         /**
3135          * Sets the "rendered-html" field of the provided item
3136          *
3137          * Body is preserved to avoid side-effects as we modify it just-in-time for spoilers and private image links
3138          *
3139          * @param array $item
3140          *
3141          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
3142          * @todo Remove reference, simply return "rendered-html" and "rendered-hash"
3143          */
3144         private static function putInCache(&$item)
3145         {
3146                 // Save original body to prevent addons to modify it
3147                 $body = $item['body'];
3148
3149                 $rendered_hash = $item['rendered-hash'] ?? '';
3150                 $rendered_html = $item['rendered-html'] ?? '';
3151
3152                 if (
3153                         $rendered_hash == ''
3154                         || $rendered_html == ''
3155                         || $rendered_hash != hash('md5', BBCode::VERSION . '::' . $body)
3156                         || DI::config()->get('system', 'ignore_cache')
3157                 ) {
3158                         $item['rendered-html'] = BBCode::convertForUriId($item['uri-id'], $item['body']);
3159                         $item['rendered-hash'] = hash('md5', BBCode::VERSION . '::' . $body);
3160
3161                         $hook_data = ['item' => $item, 'rendered-html' => $item['rendered-html'], 'rendered-hash' => $item['rendered-hash']];
3162                         Hook::callAll('put_item_in_cache', $hook_data);
3163                         $item['rendered-html'] = $hook_data['rendered-html'];
3164                         $item['rendered-hash'] = $hook_data['rendered-hash'];
3165                         unset($hook_data);
3166
3167                         // Update if the generated values differ from the existing ones
3168                         if ((($rendered_hash != $item['rendered-hash']) || ($rendered_html != $item['rendered-html'])) && !empty($item['id'])) {
3169                                 self::update(
3170                                         [
3171                                                 'rendered-html' => $item['rendered-html'],
3172                                                 'rendered-hash' => $item['rendered-hash']
3173                                         ],
3174                                         ['id' => $item['id']]
3175                                 );
3176                         }
3177                 }
3178
3179                 $item['body'] = $body;
3180         }
3181
3182         /**
3183          * Given an item array, convert the body element from bbcode to html and add smilie icons.
3184          * If attach is true, also add icons for item attachments.
3185          *
3186          * @param array   $item Record from item table
3187          * @param boolean $attach If true, add icons for item attachments as well
3188          * @param boolean $is_preview Whether this is a preview
3189          * @param boolean $only_cache Whether only cached HTML should be updated
3190          * @return string item body html
3191          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
3192          * @throws \ImagickException
3193          * @hook  prepare_body_init item array before any work
3194          * @hook  prepare_body_content_filter ('item'=>item array, 'filter_reasons'=>string array) before first bbcode to html
3195          * @hook  prepare_body ('item'=>item array, 'html'=>body string, 'is_preview'=>boolean, 'filter_reasons'=>string array) after first bbcode to html
3196          * @hook  prepare_body_final ('item'=>item array, 'html'=>body string) after attach icons and blockquote special case handling (spoiler, author)
3197          */
3198         public static function prepareBody(array &$item, bool $attach = false, bool $is_preview = false, bool $only_cache = false): string
3199         {
3200                 $a = DI::app();
3201                 Hook::callAll('prepare_body_init', $item);
3202
3203
3204                 // In order to provide theme developers more possibilities, event items
3205                 // are treated differently.
3206                 if ($item['object-type'] === Activity\ObjectType::EVENT && isset($item['event-id'])) {
3207                         $ev = Event::getItemHTML($item);
3208                         return $ev;
3209                 }
3210
3211                 $tags = Tag::populateFromItem($item);
3212
3213                 $item['tags'] = $tags['tags'];
3214                 $item['hashtags'] = $tags['hashtags'];
3215                 $item['mentions'] = $tags['mentions'];
3216
3217                 if (!$is_preview) {
3218                         $item['body'] = preg_replace("#\s*\[attachment .*?].*?\[/attachment]\s*#ism", "\n", $item['body']);
3219                         $item['body'] = Post\Media::removeFromEndOfBody($item['body'] ?? '');
3220                         $item['body'] = Post\Media::replaceImage($item['body']);
3221                 }
3222
3223                 $body = $item['body'];
3224                 if ($is_preview) {
3225                         $item['body'] = preg_replace("#\s*\[attachment .*?].*?\[/attachment]\s*#ism", "\n", $item['body']);
3226                 }
3227
3228                 $fields = ['uri-id', 'uri', 'body', 'title', 'author-name', 'author-link', 'author-avatar', 'guid', 'created', 'plink', 'network', 'has-media', 'quote-uri-id', 'post-type'];
3229
3230                 $shared_uri_id      = 0;
3231                 $shared_links       = [];
3232                 $quote_shared_links = [];
3233
3234                 $shared = DI::contentItem()->getSharedPost($item, $fields);
3235                 if (!empty($shared['post'])) {
3236                         $shared_item  = $shared['post'];
3237                         $shared_item['body'] = Post\Media::removeFromEndOfBody($shared_item['body']);
3238                         $shared_item['body'] = Post\Media::replaceImage($shared_item['body']);
3239                         $quote_uri_id = $shared['post']['uri-id'];
3240                         $shared_links[] = strtolower($shared['post']['uri']);
3241                         $item['body'] = BBCode::removeSharedData($item['body']);
3242                 } elseif (empty($shared_item['uri-id']) && empty($item['quote-uri-id']) && ($item['network'] != Protocol::DIASPORA)) {
3243                         $media = Post\Media::getByURIId($item['uri-id'], [Post\Media::ACTIVITY]);
3244                         if (!empty($media) && ($media[0]['media-uri-id'] != $item['uri-id'])) {
3245                                 $shared_item = Post::selectFirst($fields, ['uri-id' => $media[0]['media-uri-id'], 'uid' => [$item['uid'], 0]]);
3246                                 if (empty($shared_item['uri-id'])) {
3247                                         $shared_item = Post::selectFirst($fields, ['plink' => $media[0]['url'], 'uid' => [$item['uid'], 0]]);
3248                                 } elseif (!in_array(strtolower($media[0]['url']), $shared_links)) {
3249                                         $shared_links[] = strtolower($media[0]['url']);
3250                                 }
3251
3252                                 if (empty($shared_item['uri-id'])) {
3253                                         $shared_item = Post::selectFirst($fields, ['uri' => $media[0]['url'], 'uid' => [$item['uid'], 0]]);
3254                                         $shared_links[] = strtolower($media[0]['url']);
3255                                 }
3256
3257                                 if (!empty($shared_item['uri-id'])) {
3258                                         $data = BBCode::getAttachmentData($shared_item['body']);
3259                                         if (!empty($data['url'])) {
3260                                                 $quote_shared_links[] = $data['url'];
3261                                         }
3262
3263                                         $quote_uri_id = $shared_item['uri-id'];
3264                                 }
3265                         }
3266                 }
3267
3268                 if (!empty($quote_uri_id)) {
3269                         if (isset($shared_item['plink'])) {
3270                                 $item['body'] .= "\n" . DI::contentItem()->createSharedBlockByArray($shared_item, false, true);
3271                         } else {
3272                                 DI::logger()->warning('Missing plink in shared item', ['item' => $item, 'shared' => $shared, 'quote_uri_id' => $quote_uri_id, 'shared_item' => $shared_item]);
3273                         }
3274                 }
3275
3276                 if (!empty($shared_item['uri-id'])) {
3277                         $shared_uri_id = $shared_item['uri-id'];
3278                         $shared_links[] = strtolower($shared_item['plink']);
3279                         $sharedSplitAttachments = DI::postMediaRepository()->splitAttachments($shared_uri_id, [], $shared_item['has-media']);
3280                         $shared_links = array_merge($shared_links, $sharedSplitAttachments['visual']->column('url'));
3281                         $shared_links = array_merge($shared_links, $sharedSplitAttachments['link']->column('url'));
3282                         $shared_links = array_merge($shared_links, $sharedSplitAttachments['additional']->column('url'));
3283                         $item['body'] = self::replaceVisualAttachments($sharedSplitAttachments['visual'], $item['body']);
3284                 }
3285
3286                 $itemSplitAttachments = DI::postMediaRepository()->splitAttachments($item['uri-id'], $shared_links, $item['has-media'] ?? false);
3287                 $item['body'] = self::replaceVisualAttachments($itemSplitAttachments['visual'], $item['body'] ?? '');
3288
3289                 self::putInCache($item);
3290                 $item['body'] = $body;
3291                 $s = $item["rendered-html"];
3292
3293                 if ($only_cache) {
3294                         return '';
3295                 }
3296
3297                 // Compile eventual content filter reasons
3298                 $filter_reasons = [];
3299                 if (!$is_preview && DI::userSession()->getPublicContactId() != $item['author-id']) {
3300                         if (!empty($item['user-blocked-author']) || !empty($item['user-blocked-owner'])) {
3301                                 $filter_reasons[] = DI::l10n()->t('%s is blocked', $item['author-name']);
3302                         } elseif (!empty($item['user-ignored-author']) || !empty($item['user-ignored-owner'])) {
3303                                 $filter_reasons[] = DI::l10n()->t('%s is ignored', $item['author-name']);
3304                         } elseif (!empty($item['user-collapsed-author']) || !empty($item['user-collapsed-owner'])) {
3305                                 $filter_reasons[] = DI::l10n()->t('Content from %s is collapsed', $item['author-name']);
3306                         }
3307
3308                         if (!empty($item['content-warning']) && (!DI::userSession()->getLocalUserId() || !DI::pConfig()->get(DI::userSession()->getLocalUserId(), 'system', 'disable_cw', false))) {
3309                                 $filter_reasons[] = DI::l10n()->t('Content warning: %s', $item['content-warning']);
3310                         }
3311
3312                         $item['attachments'] = $itemSplitAttachments;
3313
3314                         $hook_data = [
3315                                 'item' => $item,
3316                                 'filter_reasons' => $filter_reasons
3317                         ];
3318                         Hook::callAll('prepare_body_content_filter', $hook_data);
3319                         $filter_reasons = $hook_data['filter_reasons'];
3320                         unset($hook_data);
3321                 }
3322
3323                 $hook_data = [
3324                         'item' => $item,
3325                         'html' => $s,
3326                         'preview' => $is_preview,
3327                         'filter_reasons' => $filter_reasons
3328                 ];
3329                 Hook::callAll('prepare_body', $hook_data);
3330                 $s = $hook_data['html'];
3331
3332                 unset($hook_data);
3333
3334                 if (!$attach) {
3335                         // Replace the blockquotes with quotes that are used in mails.
3336                         $mailquote = '<blockquote type="cite" class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">';
3337                         $s = str_replace(['<blockquote>', '<blockquote class="spoiler">', '<blockquote class="author">'], [$mailquote, $mailquote, $mailquote], $s);
3338                         return $s;
3339                 }
3340
3341                 if (!empty($sharedSplitAttachments)) {
3342                         $s = self::addGallery($s, $sharedSplitAttachments['visual']);
3343                         $s = self::addVisualAttachments($sharedSplitAttachments['visual'], $shared_item, $s, true);
3344                         $s = self::addLinkAttachment($shared_uri_id ?: $item['uri-id'], $sharedSplitAttachments, $body, $s, true, $quote_shared_links);
3345                         $s = self::addNonVisualAttachments($sharedSplitAttachments['additional'], $item, $s, true);
3346                         $body = BBCode::removeSharedData($body);
3347                 }
3348
3349                 $pos = strpos($s, BBCode::SHARED_ANCHOR);
3350                 if ($pos) {
3351                         $shared_html = substr($s, $pos + strlen(BBCode::SHARED_ANCHOR));
3352                         $s = substr($s, 0, $pos);
3353                 }
3354
3355                 $s = self::addGallery($s, $itemSplitAttachments['visual']);
3356                 $s = self::addVisualAttachments($itemSplitAttachments['visual'], $item, $s, false);
3357                 $s = self::addLinkAttachment($item['uri-id'], $itemSplitAttachments, $body, $s, false, $shared_links);
3358                 $s = self::addNonVisualAttachments($itemSplitAttachments['additional'], $item, $s, false);
3359                 $s = self::addQuestions($item, $s);
3360
3361                 // Map.
3362                 if (strpos($s, '<div class="map">') !== false && !empty($item['coord'])) {
3363                         $x = Map::byCoordinates(trim($item['coord']));
3364                         if ($x) {
3365                                 $s = preg_replace('/\<div class\=\"map\"\>/', '$0' . $x, $s);
3366                         }
3367                 }
3368
3369                 // Replace friendica image url size with theme preference.
3370                 if (!empty($a->getThemeInfoValue('item_image_size'))) {
3371                         $ps = $a->getThemeInfoValue('item_image_size');
3372                         $s = preg_replace('|(<img[^>]+src="[^"]+/photo/[0-9a-f]+)-[0-9]|', "$1-" . $ps, $s);
3373                 }
3374
3375                 if (!empty($shared_html)) {
3376                         $s .= $shared_html;
3377                 }
3378
3379                 $s = HTML::applyContentFilter($s, $filter_reasons);
3380
3381                 $hook_data = ['item' => $item, 'html' => $s];
3382                 Hook::callAll('prepare_body_final', $hook_data);
3383                 return $hook_data['html'];
3384         }
3385
3386         /**
3387          * Modify links to pictures to links for the "Fancybox" gallery
3388          *
3389          * @param string     $s
3390          * @param PostMedias $PostMedias
3391          * @return string
3392          */
3393         private static function addGallery(string $s, PostMedias $PostMedias): string
3394         {
3395                 foreach ($PostMedias as $PostMedia) {
3396                         if (!$PostMedia->preview || ($PostMedia->type !== Post\Media::IMAGE)) {
3397                                 continue;
3398                         }
3399
3400                         if ($PostMedia->hasDimensions()) {
3401                                 $pattern = '#<a href="' . preg_quote($PostMedia->url) . '">(.*?)"></a>#';
3402
3403                                 $s = preg_replace_callback($pattern, function () use ($PostMedia) {
3404                                         return Renderer::replaceMacros(Renderer::getMarkupTemplate('content/image/single_with_height_allocation.tpl'), [
3405                                                 '$image' => $PostMedia,
3406                                                 '$allocated_height' => $PostMedia->getAllocatedHeight(),
3407                                                 '$allocated_max_width' => ($PostMedia->previewWidth ?? $PostMedia->width) . 'px',
3408                                         ]);
3409                                 }, $s);
3410                         } else {
3411                                 $s = str_replace('<a href="' . $PostMedia->url . '"', '<a data-fancybox="uri-id-' . $PostMedia->uriId . '" href="' . $PostMedia->url . '"', $s);
3412                         }
3413                 }
3414
3415                 return $s;
3416         }
3417
3418         /**
3419          * Check if the body contains a link
3420          *
3421          * @param string $body
3422          * @param string $url
3423          * @param int    $type
3424          * @return bool
3425          */
3426         public static function containsLink(string $body, string $url, int $type = 0): bool
3427         {
3428                 // Make sure that for example site parameters aren't used when testing if the link is contained in the body
3429                 $urlparts = parse_url($url);
3430                 if (empty($urlparts)) {
3431                         return false;
3432                 }
3433
3434                 unset($urlparts['query']);
3435                 unset($urlparts['fragment']);
3436
3437                 try {
3438                         $url = (string)Uri::fromParts($urlparts);
3439                 } catch (\InvalidArgumentException $e) {
3440                         DI::logger()->notice('Invalid URL', ['$url' => $url, '$urlparts' => $urlparts]);
3441                         /* See https://github.com/friendica/friendica/issues/12113
3442                          * Malformed URLs will result in a Fatal Error
3443                          */
3444                         return false;
3445                 }
3446
3447                 // Remove media links to only search in embedded content
3448                 // @todo Check images for image link, audio for audio links, ...
3449                 if (in_array($type, [Post\Media::AUDIO, Post\Media::VIDEO, Post\Media::IMAGE])) {
3450                         $body = preg_replace("/\[url=[^\[\]]*\](.*)\[\/url\]/Usi", ' $1 ', $body);
3451                 }
3452
3453                 if (strpos($body, $url)) {
3454                         return true;
3455                 }
3456
3457                 foreach ([0, 1, 2] as $size) {
3458                         if (
3459                                 preg_match('#/photo/.*-' . $size . '\.#ism', $url) &&
3460                                 strpos(preg_replace('#(/photo/.*)-[012]\.#ism', '$1-' . $size . '.', $body), $url)
3461                         ) {
3462                                 return true;
3463                         }
3464                 }
3465
3466                 return false;
3467         }
3468
3469         /**
3470          * Replace visual attachments in the body
3471          *
3472          * @param PostMedias $PostMedias
3473          * @param string     $body
3474          * @return string modified body
3475          */
3476         private static function replaceVisualAttachments(PostMedias $PostMedias, string $body): string
3477         {
3478                 DI::profiler()->startRecording('rendering');
3479
3480                 foreach ($PostMedias as $PostMedia) {
3481                         if ($PostMedia->preview) {
3482                                 if (DI::baseUrl()->isLocalUri($PostMedia->preview)) {
3483                                         continue;
3484                                 }
3485                                 $proxy   = DI::baseUrl() . $PostMedia->getPreviewPath(Proxy::SIZE_LARGE);
3486                                 $search  = ['[img=' . $PostMedia->preview . ']', ']' . $PostMedia->preview . '[/img]'];
3487                                 $replace = ['[img=' . $proxy . ']', ']' . $proxy . '[/img]'];
3488
3489                                 $body = str_replace($search, $replace, $body);
3490                         } elseif ($PostMedia->mimetype->type == 'image') {
3491                                 if (DI::baseUrl()->isLocalUri($PostMedia->url)) {
3492                                         continue;
3493                                 }
3494                                 $proxy   = DI::baseUrl() . $PostMedia->getPreviewPath(Proxy::SIZE_LARGE);
3495                                 $search  = ['[img=' . $PostMedia->url . ']', ']' . $PostMedia->url . '[/img]'];
3496                                 $replace = ['[img=' . $proxy . ']', ']' . $proxy . '[/img]'];
3497
3498                                 $body = str_replace($search, $replace, $body);
3499                         }
3500                 }
3501                 DI::profiler()->stopRecording();
3502                 return $body;
3503         }
3504
3505         /**
3506          * Add visual attachments to the content
3507          *
3508          * @param PostMedias $PostMedias
3509          * @param array      $item
3510          * @param string     $content
3511          * @param bool       $shared
3512          * @return string modified content
3513          * @throws ServiceUnavailableException
3514          */
3515         private static function addVisualAttachments(PostMedias $PostMedias, array $item, string $content, bool $shared): string
3516         {
3517                 DI::profiler()->startRecording('rendering');
3518                 $leading  = '';
3519                 $trailing = '';
3520                 $images   = new PostMedias();
3521
3522                 // @todo In the future we should make a single for the template engine with all media in it. This allows more flexibilty.
3523                 foreach ($PostMedias as $PostMedia) {
3524                         if (self::containsLink($item['body'], $PostMedia->preview ?? $PostMedia->url, $PostMedia->type)) {
3525                                 continue;
3526                         }
3527
3528                         if ($PostMedia->mimetype->type == 'image' || $PostMedia->preview) {
3529                                 $preview_size = Proxy::SIZE_MEDIUM;
3530                                 $preview_url = DI::baseUrl() . $PostMedia->getPreviewPath($preview_size);
3531                         } else {
3532                                 $preview_size = 0;
3533                                 $preview_url = '';
3534                         }
3535
3536                         if ($preview_url && self::containsLink($item['body'], $preview_url)) {
3537                                 continue;
3538                         }
3539
3540                         if ($PostMedia->mimetype->type == 'video') {
3541                                 /// @todo Move the template to /content as well
3542                                 $media = Renderer::replaceMacros(Renderer::getMarkupTemplate('video_top.tpl'), [
3543                                         '$video' => [
3544                                                 'id'      => $PostMedia->id,
3545                                                 'src'     => (string)$PostMedia->url,
3546                                                 'name'    => $PostMedia->name ?: $PostMedia->url,
3547                                                 'preview' => $preview_url,
3548                                                 'mime'    => (string)$PostMedia->mimetype,
3549                                         ],
3550                                 ]);
3551                                 if (($item['post-type'] ?? null) == Item::PT_VIDEO) {
3552                                         $leading .= $media;
3553                                 } else {
3554                                         $trailing .= $media;
3555                                 }
3556                         } elseif ($PostMedia->mimetype->type == 'audio') {
3557                                 $media = Renderer::replaceMacros(Renderer::getMarkupTemplate('content/audio.tpl'), [
3558                                         '$audio' => [
3559                                                 'id'     => $PostMedia->id,
3560                                                 'src'    => (string)$PostMedia->url,
3561                                                 'name'   => $PostMedia->name ?: $PostMedia->url,
3562                                                 'mime'   => (string)$PostMedia->mimetype,
3563                                         ],
3564                                 ]);
3565                                 if (($item['post-type'] ?? null) == Item::PT_AUDIO) {
3566                                         $leading .= $media;
3567                                 } else {
3568                                         $trailing .= $media;
3569                                 }
3570                         } elseif ($PostMedia->mimetype->type == 'image') {
3571                                 $src_url = DI::baseUrl() . $PostMedia->getPhotoPath();
3572                                 if (self::containsLink($item['body'], $src_url)) {
3573                                         continue;
3574                                 }
3575
3576                                 $images[] = $PostMedia->withUrl(new Uri($src_url))->withPreview(new Uri($preview_url), $preview_size);
3577                         }
3578                 }
3579
3580                 $media = Image::getBodyAttachHtml($images);
3581
3582                 // On Diaspora posts the attached pictures are leading
3583                 if ($item['network'] == Protocol::DIASPORA) {
3584                         $leading .= $media;
3585                 } else {
3586                         $trailing .= $media;
3587                 }
3588
3589                 if ($shared) {
3590                         $content = str_replace(BBCode::TOP_ANCHOR, '<div class="body-attach">' . $leading . '</div>' . BBCode::TOP_ANCHOR, $content);
3591                         $content = str_replace(BBCode::BOTTOM_ANCHOR, '<div class="body-attach">' . $trailing . '</div>' . BBCode::BOTTOM_ANCHOR, $content);
3592                 } else {
3593                         if ($leading != '') {
3594                                 $content = '<div class="body-attach">' . $leading . '</div>' . $content;
3595                         }
3596
3597                         if ($trailing != '') {
3598                                 $content .= '<div class="body-attach">' . $trailing . '</div>';
3599                         }
3600                 }
3601
3602                 DI::profiler()->stopRecording();
3603                 return $content;
3604         }
3605
3606         /**
3607          * Add link attachment to the content
3608          *
3609          * @param int          $uriid
3610          * @param PostMedias[] $attachments
3611          * @param string       $body
3612          * @param string       $content
3613          * @param bool         $shared
3614          * @param array        $ignore_links A list of URLs to ignore
3615          * @return string modified content
3616          * @throws InternalServerErrorException
3617          * @throws ServiceUnavailableException
3618          */
3619         private static function addLinkAttachment(int $uriid, array $attachments, string $body, string $content, bool $shared, array $ignore_links): string
3620         {
3621                 DI::profiler()->startRecording('rendering');
3622                 // Don't show a preview when there is a visual attachment (audio or video)
3623                 $types = $attachments['visual']->column('type');
3624                 $preview = !in_array(PostMedia::TYPE_IMAGE, $types) && !in_array(PostMedia::TYPE_VIDEO, $types);
3625
3626                 /** @var ?PostMedia $attachment */
3627                 $attachment = null;
3628                 foreach ($attachments['link'] as $PostMedia) {
3629                         $found = false;
3630                         foreach ($ignore_links as $ignore_link) {
3631                                 if (Strings::compareLink($PostMedia->url, $ignore_link)) {
3632                                         $found = true;
3633                                 }
3634                         }
3635                         // @todo Judge between the links to use the one with most information
3636                         if (!$found && (empty($attachment) || $PostMedia->authorName ||
3637                                 (!$attachment->name && $PostMedia->name) ||
3638                                 (!$attachment->description && $PostMedia->description) ||
3639                                 (!$attachment->preview && $PostMedia->preview))) {
3640                                 $attachment = $PostMedia;
3641                         }
3642                 }
3643
3644                 if (!empty($attachment)) {
3645                         $data = [
3646                                 'after' => '',
3647                                 'author_name' => $attachment->authorName ?? '',
3648                                 'author_url' => (string)($attachment->authorUrl ?? ''),
3649                                 'description' => $attachment->description ?? '',
3650                                 'image' => '',
3651                                 'preview' => '',
3652                                 'provider_name' => $attachment->publisherName ?? '',
3653                                 'provider_url' => (string)($attachment->publisherUrl ?? ''),
3654                                 'text' => '',
3655                                 'title' => $attachment->name ?? '',
3656                                 'type' => 'link',
3657                                 'url' => (string)$attachment->url,
3658                         ];
3659
3660                         if ($preview && $attachment->preview) {
3661                                 if ($attachment->previewWidth >= 500) {
3662                                         $data['image'] = DI::baseUrl() . $attachment->getPreviewPath(Proxy::SIZE_MEDIUM);
3663                                 } else {
3664                                         $data['preview'] = DI::baseUrl() . $attachment->getPreviewPath(Proxy::SIZE_MEDIUM);
3665                                 }
3666                         }
3667
3668                         if (!empty($data['description']) && !empty($content)) {
3669                                 similar_text($data['description'], $content, $percent);
3670                         } else {
3671                                 $percent = 0;
3672                         }
3673
3674                         if (!empty($data['description']) && (($data['title'] == $data['description']) || ($percent > 95) || (strpos($content, $data['description']) !== false))) {
3675                                 $data['description'] = '';
3676                         }
3677
3678                         if (($data['author_name'] ?? '') == ($data['provider_name'] ?? '')) {
3679                                 $data['author_name'] = '';
3680                         }
3681
3682                         if (($data['author_url'] ?? '') == ($data['provider_url'] ?? '')) {
3683                                 $data['author_url'] = '';
3684                         }
3685                 } elseif (preg_match("/.*(\[attachment.*?\].*?\[\/attachment\]).*/ism", $body, $match)) {
3686                         $data = BBCode::getAttachmentData($match[1]);
3687                 }
3688                 DI::profiler()->stopRecording();
3689
3690                 if (isset($data['url']) && !in_array(strtolower($data['url']), $ignore_links)) {
3691                         if (!empty($data['description']) || !empty($data['image']) || !empty($data['preview']) || (!empty($data['title']) && !Strings::compareLink($data['title'], $data['url']))) {
3692                                 $parts = parse_url($data['url']);
3693                                 if (!empty($parts['scheme']) && !empty($parts['host'])) {
3694                                         if (empty($data['provider_name'])) {
3695                                                 $data['provider_name'] = $parts['host'];
3696                                         }
3697                                         if (empty($data['provider_url']) || empty(parse_url($data['provider_url'], PHP_URL_SCHEME))) {
3698                                                 $data['provider_url'] = $parts['scheme'] . '://' . $parts['host'];
3699
3700                                                 if (!empty($parts['port'])) {
3701                                                         $data['provider_url'] .= ':' . $parts['port'];
3702                                                 }
3703                                         }
3704                                 }
3705
3706                                 // @todo Use a template
3707                                 $preview_mode = DI::pConfig()->get(DI::userSession()->getLocalUserId(), 'system', 'preview_mode', BBCode::PREVIEW_LARGE);
3708                                 if ($preview_mode != BBCode::PREVIEW_NONE) {
3709                                         $rendered = BBCode::convertAttachment('', BBCode::INTERNAL, false, $data, $uriid, $preview_mode);
3710                                 } else {
3711                                         $rendered = '';
3712                                 }
3713                         } elseif (!self::containsLink($content, $data['url'], Post\Media::HTML)) {
3714                                 $rendered = Renderer::replaceMacros(Renderer::getMarkupTemplate('content/link.tpl'), [
3715                                         '$url'   => $data['url'],
3716                                         '$title' => $data['title'],
3717                                 ]);
3718                         } else {
3719                                 return $content;
3720                         }
3721
3722                         if ($shared) {
3723                                 return str_replace(BBCode::BOTTOM_ANCHOR, BBCode::BOTTOM_ANCHOR . $rendered, $content);
3724                         } else {
3725                                 return $content . $rendered;
3726                         }
3727                 }
3728                 return $content;
3729         }
3730
3731         /**
3732          * Add non-visual attachments to the content
3733          *
3734          * @param PostMedias $PostMedias
3735          * @param array      $item
3736          * @param string     $content
3737          * @return string modified content
3738          * @throws InternalServerErrorException
3739          * @throws \ImagickException
3740          */
3741         private static function addNonVisualAttachments(PostMedias $PostMedias, array $item, string $content): string
3742         {
3743                 DI::profiler()->startRecording('rendering');
3744                 $trailing = '';
3745                 foreach ($PostMedias as $PostMedia) {
3746                         if (strpos($item['body'], $PostMedia->url)) {
3747                                 continue;
3748                         }
3749
3750                         $author = [
3751                                 'uid'     => 0,
3752                                 'id'      => $item['author-id'],
3753                                 'network' => $item['author-network'],
3754                                 'url'     => $item['author-link'],
3755                                 'alias'   => $item['author-alias']
3756                         ];
3757                         $the_url = Contact::magicLinkByContact($author, $PostMedia->url);
3758
3759                         $title = Strings::escapeHtml(trim($PostMedia->description ?? '' ?: $PostMedia->url));
3760
3761                         if ($PostMedia->size) {
3762                                 $title .= ' ' . $PostMedia->size . ' ' . DI::l10n()->t('bytes');
3763                         }
3764
3765                         /// @todo Use a template
3766                         $icon = '<div class="attachtype icon s22 type-' . $PostMedia->mimetype->type . ' subtype-' . $PostMedia->mimetype->subtype . '"></div>';
3767                         $trailing .= '<a href="' . strip_tags($the_url) . '" title="' . $title . '" class="attachlink" target="_blank" rel="noopener noreferrer" >' . $icon . '</a>';
3768                 }
3769
3770                 if ($trailing != '') {
3771                         $content .= '<div class="body-attach">' . $trailing . '</div>';
3772                 }
3773
3774                 DI::profiler()->stopRecording();
3775                 return $content;
3776         }
3777
3778         private static function addQuestions(array $item, string $content): string
3779         {
3780                 DI::profiler()->startRecording('rendering');
3781                 if (!empty($item['question-id'])) {
3782                         $question = [
3783                                 'id'       => $item['question-id'],
3784                                 'multiple' => $item['question-multiple'],
3785                                 'voters'   => $item['question-voters'],
3786                                 'endtime'  => $item['question-end-time']
3787                         ];
3788
3789                         $options = Post\QuestionOption::getByURIId($item['uri-id']);
3790                         foreach ($options as $key => $option) {
3791                                 if ($question['voters'] > 0) {
3792                                         $percent = $option['replies'] / $question['voters'] * 100;
3793                                         $options[$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));
3794                                 } else {
3795                                         $options[$key]['vote'] = DI::l10n()->tt('%2$s (%1$d vote)', '%2$s (%1$d votes)', $option['replies'], $option['name']);
3796                                 }
3797                         }
3798
3799                         if (!empty($question['voters']) && !empty($question['endtime'])) {
3800                                 $summary = DI::l10n()->tt('%d voter. Poll end: %s', '%d voters. Poll end: %s', $question['voters'], Temporal::getRelativeDate($question['endtime']));
3801                         } elseif (!empty($question['voters'])) {
3802                                 $summary = DI::l10n()->tt('%d voter.', '%d voters.', $question['voters']);
3803                         } elseif (!empty($question['endtime'])) {
3804                                 $summary = DI::l10n()->t('Poll end: %s', Temporal::getRelativeDate($question['endtime']));
3805                         } else {
3806                                 $summary = '';
3807                         }
3808
3809                         $content .= Renderer::replaceMacros(Renderer::getMarkupTemplate('content/question.tpl'), [
3810                                 '$question' => $question,
3811                                 '$options'  => $options,
3812                                 '$summary'  => $summary,
3813                         ]);
3814                 }
3815                 DI::profiler()->stopRecording();
3816                 return $content;
3817         }
3818
3819         /**
3820          * get private link for item
3821          *
3822          * @param array $item
3823          * @return boolean|array False if item has not plink, otherwise array('href'=>plink url, 'title'=>translated title)
3824          * @throws \Exception
3825          */
3826         public static function getPlink(array $item)
3827         {
3828                 if (!empty($item['plink']) && Network::isValidHttpUrl($item['plink'])) {
3829                         $plink = $item['plink'];
3830                 } elseif (!empty($item['uri']) && Network::isValidHttpUrl($item['uri']) && !Network::isLocalLink($item['uri'])) {
3831                         $plink = $item['uri'];
3832                 }
3833
3834                 if (DI::userSession()->getLocalUserId()) {
3835                         $ret = [
3836                                 'href' => "display/" . $item['guid'],
3837                                 'orig' => "display/" . $item['guid'],
3838                                 'title' => DI::l10n()->t('View on separate page'),
3839                                 'orig_title' => DI::l10n()->t('View on separate page'),
3840                         ];
3841
3842                         if (!empty($plink) && ($item['private'] == self::PRIVATE)) {
3843                                 $author = [
3844                                         'uid'     => 0,
3845                                         'id'      => $item['author-id'],
3846                                         'network' => $item['author-network'],
3847                                         'url'     => $item['author-link'],
3848                                         'alias'   => $item['author-alias'],
3849                                 ];
3850                                 $plink = Contact::magicLinkByContact($author, $plink);
3851                         }
3852
3853                         if (!empty($plink)) {
3854                                 $ret['href'] = DI::baseUrl()->remove($plink);
3855                                 $ret['title'] = DI::l10n()->t('Link to source');
3856                         }
3857                 } elseif (!empty($plink) && ($item['private'] != self::PRIVATE)) {
3858                         $ret = [
3859                                 'href' => $plink,
3860                                 'orig' => $plink,
3861                                 'title' => DI::l10n()->t('Link to source'),
3862                                 'orig_title' => DI::l10n()->t('Link to source'),
3863                         ];
3864                 } else {
3865                         $ret = [];
3866                 }
3867
3868                 return $ret;
3869         }
3870
3871         /**
3872          * Does the given uri-id belongs to a post that is sent as starting post to a group?
3873          * This does apply to posts that are sent via ! and not in parallel to a group via @
3874          *
3875          * @param int $uri_id
3876          *
3877          * @return boolean "true" when it is a group post
3878          */
3879         public static function isGroupPost(int $uri_id): bool
3880         {
3881                 if (Post::exists(['private' => Item::PUBLIC, 'uri-id' => $uri_id])) {
3882                         return false;
3883                 }
3884
3885                 foreach (Tag::getByURIId($uri_id, [Tag::EXCLUSIVE_MENTION, Tag::AUDIENCE]) as $tag) {
3886                         // @todo Possibly check for a public audience in the future, see https://socialhub.activitypub.rocks/t/fep-1b12-group-federation/2724
3887                         // and https://codeberg.org/fediverse/fep/src/branch/main/feps/fep-1b12.md
3888                         if (DBA::exists('contact', ['uid' => 0, 'nurl' => Strings::normaliseLink($tag['url']), 'contact-type' => Contact::TYPE_COMMUNITY])) {
3889                                 return true;
3890                         }
3891                 }
3892                 return false;
3893         }
3894
3895         /**
3896          * Search item id for given URI or plink
3897          *
3898          * @param string $uri
3899          * @param integer $uid
3900          *
3901          * @return integer item id
3902          */
3903         public static function searchByLink(string $uri, int $uid = 0): int
3904         {
3905                 $ssl_uri = str_replace('http://', 'https://', $uri);
3906                 $uris = [$uri, $ssl_uri, Strings::normaliseLink($uri)];
3907
3908                 $item = Post::selectFirst(['id'], ['uri' => $uris, 'uid' => $uid]);
3909                 if (DBA::isResult($item)) {
3910                         return $item['id'];
3911                 }
3912
3913                 $item = Post::selectFirst(['id'], ['plink' => $uris, 'uid' => $uid]);
3914                 if (DBA::isResult($item)) {
3915                         return $item['id'];
3916                 }
3917
3918                 return 0;
3919         }
3920
3921         /**
3922          * Return the URI for a link to the post
3923          *
3924          * @param string $uri URI or link to post
3925          *
3926          * @return string URI
3927          */
3928         public static function getURIByLink(string $uri): string
3929         {
3930                 $ssl_uri = str_replace('http://', 'https://', $uri);
3931                 $uris = [$uri, $ssl_uri, Strings::normaliseLink($uri)];
3932
3933                 $item = Post::selectFirst(['uri'], ['uri' => $uris]);
3934                 if (DBA::isResult($item)) {
3935                         return $item['uri'];
3936                 }
3937
3938                 $item = Post::selectFirst(['uri'], ['plink' => $uris]);
3939                 if (DBA::isResult($item)) {
3940                         return $item['uri'];
3941                 }
3942
3943                 return '';
3944         }
3945
3946         /**
3947          * Fetches item for given URI or plink
3948          *
3949          * @param string $uri
3950          * @param int    $uid
3951          * @param int    $completion
3952          *
3953          * @return integer item id
3954          */
3955         public static function fetchByLink(string $uri, int $uid = 0, int $completion = ActivityPub\Receiver::COMPLETION_MANUAL): int
3956         {
3957                 Logger::info('Trying to fetch link', ['uid' => $uid, 'uri' => $uri]);
3958                 $item_id = self::searchByLink($uri, $uid);
3959                 if (!empty($item_id)) {
3960                         Logger::info('Link found', ['uid' => $uid, 'uri' => $uri, 'id' => $item_id]);
3961                         return $item_id;
3962                 }
3963
3964                 $hookData = [
3965                         'uri'     => $uri,
3966                         'uid'     => $uid,
3967                         'item_id' => null,
3968                 ];
3969
3970                 Hook::callAll('item_by_link', $hookData);
3971
3972                 if (isset($hookData['item_id'])) {
3973                         return is_numeric($hookData['item_id']) ? $hookData['item_id'] : 0;
3974                 }
3975
3976                 $fetched_uri = ActivityPub\Processor::fetchMissingActivity($uri, [], '', $completion, $uid);
3977
3978                 if ($fetched_uri) {
3979                         $item_id = self::searchByLink($fetched_uri, $uid);
3980                 } else {
3981                         $item_id = Diaspora::fetchByURL($uri);
3982                 }
3983
3984                 if (!empty($item_id)) {
3985                         Logger::info('Link fetched', ['uid' => $uid, 'uri' => $uri, 'id' => $item_id]);
3986                         return $item_id;
3987                 }
3988
3989                 Logger::info('Link not found', ['uid' => $uid, 'uri' => $uri]);
3990                 return 0;
3991         }
3992
3993         /**
3994          * Fetch the uri-id of a quote
3995          *
3996          * @param string $body
3997          * @return integer
3998          */
3999         public static function getQuoteUriId(string $body, int $uid = 0): int
4000         {
4001                 $shared = BBCode::fetchShareAttributes($body);
4002                 if (empty($shared['guid']) && empty($shared['message_id'])) {
4003                         return 0;
4004                 }
4005
4006                 if (empty($shared['link']) && empty($shared['message_id'])) {
4007                         Logger::notice('Invalid share block.', ['share' => $shared]);
4008                         return 0;
4009                 }
4010
4011                 if (!empty($shared['guid'])) {
4012                         $shared_item = Post::selectFirst(['uri-id'], ['guid' => $shared['guid'], 'uid' => [0, $uid]]);
4013                         if (!empty($shared_item['uri-id'])) {
4014                                 Logger::debug('Found post by guid', ['guid' => $shared['guid'], 'uid' => $uid]);
4015                                 return $shared_item['uri-id'];
4016                         }
4017                 }
4018
4019                 if (!empty($shared['message_id'])) {
4020                         $shared_item = Post::selectFirst(['uri-id'], ['uri' => $shared['message_id'], 'uid' => [0, $uid]]);
4021                         if (!empty($shared_item['uri-id'])) {
4022                                 Logger::debug('Found post by message_id', ['message_id' => $shared['message_id'], 'uid' => $uid]);
4023                                 return $shared_item['uri-id'];
4024                         }
4025                 }
4026
4027                 if (!empty($shared['link'])) {
4028                         $shared_item = Post::selectFirst(['uri-id'], ['plink' => $shared['link'], 'uid' => [0, $uid]]);
4029                         if (!empty($shared_item['uri-id'])) {
4030                                 Logger::debug('Found post by link', ['link' => $shared['link'], 'uid' => $uid]);
4031                                 return $shared_item['uri-id'];
4032                         }
4033                 }
4034
4035                 $url = $shared['message_id'] ?: $shared['link'];
4036                 $id = self::fetchByLink($url, 0, ActivityPub\Receiver::COMPLETION_ASYNC);
4037                 if (!$id) {
4038                         Logger::notice('Post could not be fetched.', ['url' => $url, 'uid' => $uid]);
4039                         return 0;
4040                 }
4041
4042                 $shared_item = Post::selectFirst(['uri-id'], ['id' => $id]);
4043                 if (!empty($shared_item['uri-id'])) {
4044                         Logger::debug('Fetched shared post', ['id' => $id, 'url' => $url, 'uid' => $uid]);
4045                         return $shared_item['uri-id'];
4046                 }
4047
4048                 Logger::warning('Post does not exist although it was supposed to had been fetched.', ['id' => $id, 'url' => $url, 'uid' => $uid]);
4049                 return 0;
4050         }
4051 }