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', 'language', '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'], $condition);
 197                 }
 198
 199                 if (!empty($fields['body'])) {
 200                         $fields['body'] = self::setHashtags($fields['body']);
 201                 }
 202
 203                 $rows = Post::update($fields, $condition);
 204                 if (is_bool($rows)) {
 205                         return $rows;
 206                 }
 207
 208                 // We only need to call the line by line update for specific fields
 209                 if (
 210                         empty($fields['body']) && empty($fields['file']) &&
 211                         empty($fields['attach']) && empty($fields['edited'])
 212                 ) {
 213                         return $rows;
 214                 }
 215
 216                 Logger::info('Updating per single row method', ['fields' => $fields, 'condition' => $condition]);
 217
 218                 $items = Post::select(['id', 'origin', 'uri-id', 'uid', 'author-network', 'quote-uri-id'], $condition);
 219
 220                 $notify_items = [];
 221
 222                 while ($item = DBA::fetch($items)) {
 223                         if (!empty($fields['body'])) {
 224                                 if (!empty($item['quote-uri-id'])) {
 225                                         $fields['body'] = BBCode::removeSharedData($fields['body']);
 226
 227                                         if (!empty($fields['raw-body'])) {
 228                                                 $fields['raw-body'] = BBCode::removeSharedData($fields['raw-body']);
 229                                         }
 230                                 }
 231
 232                                 $content_fields = ['raw-body' => trim($fields['raw-body'] ?? $fields['body'])];
 233
 234                                 // Remove all media attachments from the body and store them in the post-media table
 235                                 // @todo On shared postings (Diaspora style and commented reshare) don't fetch content from the shared part
 236                                 $content_fields['raw-body'] = Post\Media::insertFromBody($item['uri-id'], $content_fields['raw-body']);
 237                                 $content_fields['raw-body'] = self::setHashtags($content_fields['raw-body']);
 238
 239                                 Post\Media::insertFromRelevantUrl($item['uri-id'], $content_fields['raw-body'], $fields['body'], $item['author-network']);
 240
 241                                 Post\Media::insertFromAttachmentData($item['uri-id'], $fields['body']);
 242                                 $content_fields['raw-body'] = BBCode::removeAttachment($content_fields['raw-body']);
 243
 244                                 Post\Content::update($item['uri-id'], $content_fields);
 245                         }
 246
 247                         if (!empty($fields['file'])) {
 248                                 Post\Category::storeTextByURIId($item['uri-id'], $item['uid'], $fields['file']);
 249                         }
 250
 251                         if (!empty($fields['attach'])) {
 252                                 Post\Media::insertFromAttachment($item['uri-id'], $fields['attach']);
 253                         }
 254
 255                         // We only need to notify others when it is an original entry from us.
 256                         // Only call the notifier when the item had been edited and records had been changed.
 257                         if ($item['origin'] && !empty($fields['edited']) && ($previous['edited'] != $fields['edited'])) {
 258                                 $notify_items[] = $item['id'];
 259                         }
 260                 }
 261
 262                 DBA::close($items);
 263
 264                 foreach ($notify_items as $notify_item) {
 265                         $post = Post::selectFirst([], ['id' => $notify_item]);
 266
 267                         if ($post['gravity'] != self::GRAVITY_PARENT) {
 268                                 $signed = Diaspora::createCommentSignature($post);
 269                                 if (!empty($signed)) {
 270                                         DBA::replace('diaspora-interaction', ['uri-id' => $post['uri-id'], 'interaction' => json_encode($signed)]);
 271                                 }
 272                         }
 273
 274                         Worker::add(Worker::PRIORITY_HIGH, 'Notifier', Delivery::POST, (int)$post['uri-id'], (int)$post['uid']);
 275                 }
 276
 277                 return $rows;
 278         }
 279
 280         /**
 281          * Delete an item and notify others about it - if it was ours
 282          *
 283          * @param array   $condition The condition for finding the item entries
 284          * @param integer $priority  Priority for the notification
 285          * @return void
 286          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 287          */
 288         public static function markForDeletion(array $condition, int $priority = Worker::PRIORITY_HIGH)
 289         {
 290                 $items = Post::select(['id'], $condition);
 291                 while ($item = Post::fetch($items)) {
 292                         self::markForDeletionById($item['id'], $priority);
 293                 }
 294                 DBA::close($items);
 295         }
 296
 297         /**
 298          * Delete an item for an user and notify others about it - if it was ours
 299          *
 300          * @param array   $condition The condition for finding the item entries
 301          * @param integer $uid       User who wants to delete this item
 302          * @return void
 303          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 304          */
 305         public static function deleteForUser(array $condition, int $uid)
 306         {
 307                 if ($uid == 0) {
 308                         return;
 309                 }
 310
 311                 $items = Post::select(['id', 'uid', 'uri-id'], $condition);
 312                 while ($item = Post::fetch($items)) {
 313                         if (in_array($item['uid'], [$uid, 0])) {
 314                                 Post\User::update($item['uri-id'], $uid, ['hidden' => true], true);
 315                                 Post\ThreadUser::update($item['uri-id'], $uid, ['hidden' => true], true);
 316                         }
 317
 318                         if ($item['uid'] == $uid) {
 319                                 self::markForDeletionById($item['id'], Worker::PRIORITY_HIGH);
 320                         } elseif ($item['uid'] != 0) {
 321                                 Logger::warning('Wrong ownership. Not deleting item', ['id' => $item['id']]);
 322                         }
 323                 }
 324                 DBA::close($items);
 325         }
 326
 327         /**
 328          * Mark an item for deletion, delete related data and notify others about it - if it was ours
 329          *
 330          * @param integer $item_id
 331          * @param integer $priority Priority for the notification
 332          * @return boolean success
 333          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 334          */
 335         public static function markForDeletionById(int $item_id, int $priority = Worker::PRIORITY_HIGH): bool
 336         {
 337                 Logger::info('Mark item for deletion by id', ['id' => $item_id]);
 338                 // locate item to be deleted
 339                 $fields = [
 340                         'id', 'uri', 'uri-id', 'uid', 'parent', 'parent-uri-id', 'origin',
 341                         'deleted', 'resource-id', 'event-id',
 342                         'verb', 'object-type', 'object', 'target', 'contact-id', 'psid', 'gravity'
 343                 ];
 344                 $item = Post::selectFirst($fields, ['id' => $item_id]);
 345                 if (!DBA::isResult($item)) {
 346                         Logger::info('Item not found.', ['id' => $item_id]);
 347                         return false;
 348                 }
 349
 350                 if ($item['deleted']) {
 351                         Logger::info('Item has already been marked for deletion.', ['id' => $item_id]);
 352                         return false;
 353                 }
 354
 355                 $parent = Post::selectFirst(['origin'], ['id' => $item['parent']]);
 356                 if (!DBA::isResult($parent)) {
 357                         $parent = ['origin' => false];
 358                 }
 359
 360                 // clean up categories and tags so they don't end up as orphans
 361                 Post\Category::deleteByURIId($item['uri-id'], $item['uid']);
 362
 363                 /*
 364                  * If item is a link to a photo resource, nuke all the associated photos
 365                  * (visitors will not have photo resources)
 366                  * This only applies to photos uploaded from the photos page. Photos inserted into a post do not
 367                  * generate a resource-id and therefore aren't intimately linked to the item.
 368                  */
 369                 /// @TODO: this should first check if photo is used elsewhere
 370                 if ($item['resource-id']) {
 371                         Photo::delete(['resource-id' => $item['resource-id'], 'uid' => $item['uid']]);
 372                 }
 373
 374                 // If item is a link to an event, delete the event.
 375                 if (intval($item['event-id'])) {
 376                         Event::delete($item['event-id']);
 377                 }
 378
 379                 // If item has attachments, drop them
 380                 $attachments = Post\Media::getByURIId($item['uri-id'], [Post\Media::DOCUMENT]);
 381                 foreach ($attachments as $attachment) {
 382                         if (preg_match('|attach/(\d+)|', $attachment['url'], $matches)) {
 383                                 Attach::delete(['id' => $matches[1], 'uid' => $item['uid']]);
 384                         }
 385                 }
 386
 387                 // Set the item to "deleted"
 388                 $item_fields = ['deleted' => true, 'edited' => DateTimeFormat::utcNow(), 'changed' => DateTimeFormat::utcNow()];
 389                 Post::update($item_fields, ['id' => $item['id']]);
 390
 391                 Post\Category::storeTextByURIId($item['uri-id'], $item['uid'], '');
 392
 393                 if (!Post::exists(["`uri-id` = ? AND `uid` != 0 AND NOT `deleted`", $item['uri-id']])) {
 394                         self::markForDeletion(['uri-id' => $item['uri-id'], 'uid' => 0, 'deleted' => false], $priority);
 395                 }
 396
 397                 Post\DeliveryData::delete($item['uri-id']);
 398
 399                 // If it's the parent of a comment thread, kill all the kids
 400                 if ($item['gravity'] == self::GRAVITY_PARENT) {
 401                         self::markForDeletion(['parent' => $item['parent'], 'deleted' => false], $priority);
 402                 }
 403
 404                 // Is it our comment and/or our thread?
 405                 if (($item['origin'] || $parent['origin']) && ($item['uid'] != 0)) {
 406                         // When we delete the original post we will delete all existing copies on the server as well
 407                         self::markForDeletion(['uri-id' => $item['uri-id'], 'deleted' => false], $priority);
 408
 409                         // send the notification upstream/downstream
 410                         if ($priority) {
 411                                 Worker::add(['priority' => $priority, 'dont_fork' => true], 'Notifier', Delivery::DELETION, (int)$item['uri-id'], (int)$item['uid']);
 412                         }
 413                 } elseif ($item['uid'] != 0) {
 414                         Post\User::update($item['uri-id'], $item['uid'], ['hidden' => true]);
 415                         Post\ThreadUser::update($item['uri-id'], $item['uid'], ['hidden' => true]);
 416                 }
 417
 418                 DI::notify()->deleteForItem($item['uri-id']);
 419                 DI::notification()->deleteForItem($item['uri-id']);
 420
 421                 Logger::info('Item has been marked for deletion.', ['id' => $item_id]);
 422
 423                 return true;
 424         }
 425
 426         /**
 427          * Get guid from given item record
 428          *
 429          * @param array $item Item record
 430          * @param bool Whether to notify (?)
 431          * @return string Guid
 432          */
 433         public static function guid(array $item, bool $notify): string
 434         {
 435                 if (!empty($item['guid'])) {
 436                         return trim($item['guid']);
 437                 }
 438
 439                 if ($notify) {
 440                         // We have to avoid duplicates. So we create the GUID in form of a hash of the plink or uri.
 441                         // We add the hash of our own host because our host is the original creator of the post.
 442                         $prefix_host = DI::baseUrl()->getHost();
 443                 } else {
 444                         $prefix_host = '';
 445
 446                         // We are only storing the post so we create a GUID from the original hostname.
 447                         if (!empty($item['author-link'])) {
 448                                 $parsed = parse_url($item['author-link']);
 449                                 if (!empty($parsed['host'])) {
 450                                         $prefix_host = $parsed['host'];
 451                                 }
 452                         }
 453
 454                         if (empty($prefix_host) && !empty($item['plink'])) {
 455                                 $parsed = parse_url($item['plink']);
 456                                 if (!empty($parsed['host'])) {
 457                                         $prefix_host = $parsed['host'];
 458                                 }
 459                         }
 460
 461                         if (empty($prefix_host) && !empty($item['uri'])) {
 462                                 $parsed = parse_url($item['uri']);
 463                                 if (!empty($parsed['host'])) {
 464                                         $prefix_host = $parsed['host'];
 465                                 }
 466                         }
 467
 468                         // Is it in the format data@host.tld? - Used for mail contacts
 469                         if (empty($prefix_host) && !empty($item['author-link']) && strstr($item['author-link'], '@')) {
 470                                 $mailparts = explode('@', $item['author-link']);
 471                                 $prefix_host = array_pop($mailparts);
 472                         }
 473                 }
 474
 475                 if (!empty($item['plink'])) {
 476                         $guid = self::guidFromUri($item['plink'], $prefix_host);
 477                 } elseif (!empty($item['uri'])) {
 478                         $guid = self::guidFromUri($item['uri'], $prefix_host);
 479                 } else {
 480                         $guid = System::createUUID(hash('crc32', $prefix_host));
 481                 }
 482
 483                 return $guid;
 484         }
 485
 486         /**
 487          * Returns contact id from given item record
 488          *
 489          * @param array $item Item record
 490          * @return int Contact id
 491          */
 492         private static function contactId(array $item): int
 493         {
 494                 if ($item['uid'] == 0) {
 495                         return $item['owner-id'];
 496                 }
 497
 498                 if ($item['origin']) {
 499                         $owner = User::getOwnerDataById($item['uid']);
 500                         return $owner['id'];
 501                 }
 502
 503                 $contact_id      = 0;
 504                 $user_contact_id = 0;
 505                 foreach (['group-link', 'causer-link', 'owner-link', 'author-link'] as $field) {
 506                         if (empty($item[$field])) {
 507                                 continue;
 508                         }
 509                         if (!$user_contact_id && Contact::isSharingByURL($item[$field], $item['uid'], true)) {
 510                                 $user_contact_id = Contact::getIdForURL($item[$field], $item['uid']);
 511                         } elseif (!$contact_id) {
 512                                 $contact_id = Contact::getIdForURL($item[$field]);
 513                         }
 514                 }
 515
 516                 if ($user_contact_id) {
 517                         return $user_contact_id;
 518                 }
 519
 520                 if (!empty($item['causer-id']) && Contact::isSharing($item['causer-id'], $item['uid'], true)) {
 521                         $cdata = Contact::getPublicAndUserContactID($item['causer-id'], $item['uid']);
 522                         if (!empty($cdata['user'])) {
 523                                 return $cdata['user'];
 524                         }
 525                 }
 526
 527                 if ($contact_id) {
 528                         return $contact_id;
 529                 }
 530
 531                 Logger::warning('contact-id could not be fetched, using self contact instead.', ['uid' => $item['uid'], 'item' => $item]);
 532                 $self = Contact::selectFirst(['id'], ['self' => true, 'uid' => $item['uid']]);
 533                 return $self['id'];
 534         }
 535
 536         /**
 537          * Write an item array into a spool file to be inserted later.
 538          * This command is called whenever there are issues storing an item.
 539          *
 540          * @param array $item The item fields that are to be inserted
 541          * @throws \Exception
 542          */
 543         private static function spool(array $item)
 544         {
 545                 // Now we store the data in the spool directory
 546                 // We use "microtime" to keep the arrival order and "mt_rand" to avoid duplicates
 547                 $file = 'item-' . round(microtime(true) * 10000) . '-' . mt_rand() . '.msg';
 548
 549                 $spoolpath = System::getSpoolPath();
 550                 if ($spoolpath != '') {
 551                         $spool = $spoolpath . '/' . $file;
 552
 553                         file_put_contents($spool, json_encode($item));
 554                         Logger::warning("Item wasn't stored - Item was spooled into file", ['file' => $file]);
 555                 }
 556         }
 557
 558         /**
 559          * Check if the item array is a duplicate
 560          *
 561          * @param array $item Item record
 562          * @return boolean is it a duplicate?
 563          */
 564         private static function isDuplicate(array $item): bool
 565         {
 566                 // Checking if there is already an item with the same guid
 567                 $condition = ['guid' => $item['guid'], 'network' => $item['network'], 'uid' => $item['uid']];
 568                 if (Post::exists($condition)) {
 569                         Logger::notice('Found already existing item', $condition);
 570                         return true;
 571                 }
 572
 573                 $condition = [
 574                         'uri-id' => $item['uri-id'], 'uid' => $item['uid'],
 575                         'network' => [$item['network'], Protocol::DFRN]
 576                 ];
 577                 if (Post::exists($condition)) {
 578                         Logger::notice('duplicated item with the same uri found.', $condition);
 579                         return true;
 580                 }
 581
 582                 // On Friendica and Diaspora the GUID is unique
 583                 if (in_array($item['network'], [Protocol::DFRN, Protocol::DIASPORA])) {
 584                         $condition = ['guid' => $item['guid'], 'uid' => $item['uid']];
 585                         if (Post::exists($condition)) {
 586                                 Logger::notice('duplicated item with the same guid found.', $condition);
 587                                 return true;
 588                         }
 589                 } elseif ($item['network'] == Protocol::OSTATUS) {
 590                         // Check for an existing post with the same content. There seems to be a problem with OStatus.
 591                         $condition = [
 592                                 "`body` = ? AND `network` = ? AND `created` = ? AND `contact-id` = ? AND `uid` = ?",
 593                                 $item['body'], $item['network'], $item['created'], $item['contact-id'], $item['uid']
 594                         ];
 595                         if (Post::exists($condition)) {
 596                                 Logger::notice('duplicated item with the same body found.', $item);
 597                                 return true;
 598                         }
 599                 }
 600
 601                 /*
 602                  * Check for already added items.
 603                  * There is a timing issue here that sometimes creates double postings.
 604                  * An unique index would help - but the limitations of MySQL (maximum size of index values) prevent this.
 605                  */
 606                 if (($item['uid'] == 0) && Post::exists(['uri-id' => $item['uri-id'], 'uid' => 0])) {
 607                         Logger::notice('Global item already stored.', ['uri-id' => $item['uri-id'], 'network' => $item['network']]);
 608                         return true;
 609                 }
 610
 611                 return false;
 612         }
 613
 614         /**
 615          * Check if the item array is valid
 616          *
 617          * @param array $item Item record
 618          * @return boolean item is valid
 619          */
 620         public static function isValid(array $item): bool
 621         {
 622                 // When there is no content then we don't post it
 623                 if (($item['body'] . $item['title'] == '') && empty($item['quote-uri-id']) && empty($item['attachments']) && (empty($item['uri-id']) || !Post\Media::existsByURIId($item['uri-id']))) {
 624                         Logger::notice('No body, no title.');
 625                         return false;
 626                 }
 627
 628                 if (!empty($item['uid'])) {
 629                         $owner = User::getOwnerDataById($item['uid'], false);
 630                         if (!$owner) {
 631                                 Logger::warning('Missing item user owner data', ['uid' => $item['uid']]);
 632                                 return false;
 633                         }
 634
 635                         if ($owner['account_expired'] || $owner['account_removed']) {
 636                                 Logger::notice('Item user has been deleted/expired/removed', ['uid' => $item['uid'], 'deleted' => $owner['deleted'], 'account_expired' => $owner['account_expired'], 'account_removed' => $owner['account_removed']]);
 637                                 return false;
 638                         }
 639                 }
 640
 641                 if (!empty($item['author-id']) && Contact::isBlocked($item['author-id'])) {
 642                         Logger::notice('Author is blocked node-wide', ['author-link' => $item['author-link'], 'item-uri' => $item['uri']]);
 643                         return false;
 644                 }
 645
 646                 if (!empty($item['author-link']) && Network::isUrlBlocked($item['author-link'])) {
 647                         Logger::notice('Author server is blocked', ['author-link' => $item['author-link'], 'item-uri' => $item['uri']]);
 648                         return false;
 649                 }
 650
 651                 if (!empty($item['owner-id']) && Contact::isBlocked($item['owner-id'])) {
 652                         Logger::notice('Owner is blocked node-wide', ['owner-link' => $item['owner-link'], 'item-uri' => $item['uri']]);
 653                         return false;
 654                 }
 655
 656                 if (!empty($item['owner-link']) && Network::isUrlBlocked($item['owner-link'])) {
 657                         Logger::notice('Owner server is blocked', ['owner-link' => $item['owner-link'], 'item-uri' => $item['uri']]);
 658                         return false;
 659                 }
 660
 661                 if ($item['verb'] == Activity::FOLLOW) {
 662                         if (!$item['origin'] && ($item['author-id'] == Contact::getPublicIdByUserId($item['uid']))) {
 663                                 // Our own follow request can be relayed to us. We don't store it to avoid notification chaos.
 664                                 Logger::info("Follow: Don't store not origin follow request", ['parent-uri' => $item['parent-uri']]);
 665                                 return false;
 666                         }
 667
 668                         $condition = [
 669                                 'verb' => Activity::FOLLOW, 'uid' => $item['uid'],
 670                                 'parent-uri' => $item['parent-uri'], 'author-id' => $item['author-id']
 671                         ];
 672                         if (Post::exists($condition)) {
 673                                 // It happens that we receive multiple follow requests by the same author - we only store one.
 674                                 Logger::info('Follow: Found existing follow request from author', ['author-id' => $item['author-id'], 'parent-uri' => $item['parent-uri']]);
 675                                 return false;
 676                         }
 677                 }
 678
 679                 return true;
 680         }
 681
 682         /**
 683          * Check if the item array is too old
 684          *
 685          * @param array $item Item record
 686          * @return boolean item is too old
 687          */
 688         public static function isTooOld(array $item): bool
 689         {
 690                 // check for create date and expire time
 691                 $expire_interval = DI::config()->get('system', 'dbclean-expire-days', 0);
 692
 693                 $user = DBA::selectFirst('user', ['expire'], ['uid' => $item['uid']]);
 694                 if (DBA::isResult($user) && ($user['expire'] > 0) && (($user['expire'] < $expire_interval) || ($expire_interval == 0))) {
 695                         $expire_interval = $user['expire'];
 696                 }
 697
 698                 if (($expire_interval > 0) && !empty($item['created'])) {
 699                         $expire_date = time() - ($expire_interval * 86400);
 700                         $created_date = strtotime($item['created']);
 701                         if ($created_date < $expire_date) {
 702                                 Logger::notice('Item created before expiration interval.', [
 703                                         'created' => date('c', $created_date),
 704                                         'expired' => date('c', $expire_date),
 705                                         '$item' => $item
 706                                 ]);
 707                                 return true;
 708                         }
 709                 }
 710
 711                 return false;
 712         }
 713
 714         /**
 715          * Return the id of the given item array if it has been stored before
 716          *
 717          * @param array $item Item record
 718          * @return integer Item id or zero on error
 719          */
 720         private static function getDuplicateID(array $item): int
 721         {
 722                 if (empty($item['network']) || in_array($item['network'], Protocol::FEDERATED)) {
 723                         $condition = [
 724                                 '`uri-id` = ? AND `uid` = ? AND `network` IN (?, ?, ?, ?)',
 725                                 $item['uri-id'],
 726                                 $item['uid'],
 727                                 Protocol::ACTIVITYPUB,
 728                                 Protocol::DIASPORA,
 729                                 Protocol::DFRN,
 730                                 Protocol::OSTATUS
 731                         ];
 732                         $existing = Post::selectFirst(['id', 'network'], $condition);
 733                         if (DBA::isResult($existing)) {
 734                                 // We only log the entries with a different user id than 0. Otherwise we would have too many false positives
 735                                 if ($item['uid'] != 0) {
 736                                         Logger::notice('Item already existed for user', [
 737                                                 'uri-id' => $item['uri-id'],
 738                                                 'uid' => $item['uid'],
 739                                                 'network' => $item['network'],
 740                                                 'existing_id' => $existing['id'],
 741                                                 'existing_network' => $existing['network']
 742                                         ]);
 743                                 }
 744
 745                                 return $existing['id'];
 746                         }
 747                 }
 748                 return 0;
 749         }
 750
 751         /**
 752          * Fetch the uri-id of the parent for the given uri-id
 753          *
 754          * @param integer $uriid
 755          * @return integer
 756          */
 757         public static function getParent(int $uriid): int
 758         {
 759                 $thread_parent = Post::selectFirstPost(['thr-parent-id', 'gravity'], ['uri-id' => $uriid]);
 760                 if (empty($thread_parent)) {
 761                         return 0;
 762                 }
 763
 764                 if ($thread_parent['gravity'] == Item::GRAVITY_PARENT) {
 765                         return $uriid;
 766                 }
 767
 768                 return self::getParent($thread_parent['thr-parent-id']);
 769         }
 770
 771         /**
 772          * Fetch top-level parent data for the given item array
 773          *
 774          * @param array $item
 775          * @return array item array with parent data
 776          * @throws \Exception
 777          */
 778         private static function getTopLevelParent(array $item): array
 779         {
 780                 $fields = [
 781                         'uid', 'uri', 'parent-uri', 'id', 'deleted',
 782                         'uri-id', 'parent-uri-id',
 783                         'allow_cid', 'allow_gid', 'deny_cid', 'deny_gid',
 784                         'wall', 'private', 'origin', 'author-id'
 785                 ];
 786                 $condition = ['uri-id' => [$item['thr-parent-id'], $item['parent-uri-id']], 'uid' => $item['uid']];
 787                 $params = ['order' => ['id' => false]];
 788                 $parent = Post::selectFirst($fields, $condition, $params);
 789
 790                 if (!DBA::isResult($parent) && Post::exists(['uri-id' => [$item['thr-parent-id'], $item['parent-uri-id']], 'uid' => 0])) {
 791                         $stored = Item::storeForUserByUriId($item['thr-parent-id'], $item['uid'], ['post-reason' => Item::PR_COMPLETION]);
 792                         if (!$stored && ($item['thr-parent-id'] != $item['parent-uri-id'])) {
 793                                 $stored = Item::storeForUserByUriId($item['parent-uri-id'], $item['uid'], ['post-reason' => Item::PR_COMPLETION]);
 794                         }
 795                         if ($stored) {
 796                                 Logger::info('Stored thread parent item for user', ['uri-id' => $item['thr-parent-id'], 'uid' => $item['uid'], 'stored' => $stored]);
 797                                 $parent = Post::selectFirst($fields, $condition, $params);
 798                         }
 799                 }
 800
 801                 if (!DBA::isResult($parent)) {
 802                         Logger::notice('item parent was not found - ignoring item', ['uri-id' => $item['uri-id'], 'thr-parent-id' => $item['thr-parent-id'], 'uid' => $item['uid']]);
 803                         return [];
 804                 }
 805
 806                 if ($parent['uri-id'] == $parent['parent-uri-id']) {
 807                         return $parent;
 808                 }
 809
 810                 $condition = [
 811                         'uri-id' => $parent['parent-uri-id'],
 812                         'parent-uri-id' => $parent['parent-uri-id'],
 813                         'uid' => $parent['uid']
 814                 ];
 815                 $params = ['order' => ['id' => false]];
 816                 $toplevel_parent = Post::selectFirst($fields, $condition, $params);
 817
 818                 if (!DBA::isResult($toplevel_parent) && $item['origin']) {
 819                         $stored = Item::storeForUserByUriId($item['parent-uri-id'], $item['uid'], ['post-reason' => Item::PR_COMPLETION]);
 820                         Logger::info('Stored parent item for user', ['uri-id' => $item['parent-uri-id'], 'uid' => $item['uid'], 'stored' => $stored]);
 821                         $toplevel_parent = Post::selectFirst($fields, $condition, $params);
 822                 }
 823
 824                 if (!DBA::isResult($toplevel_parent)) {
 825                         Logger::notice('item top level parent was not found - ignoring item', ['parent-uri-id' => $parent['parent-uri-id'], 'uid' => $parent['uid']]);
 826                         return [];
 827                 }
 828
 829                 return $toplevel_parent;
 830         }
 831
 832         /**
 833          * Get the gravity for the given item array
 834          *
 835          * @param array $item
 836          * @return integer gravity
 837          */
 838         private static function getGravity(array $item): int
 839         {
 840                 $activity = DI::activity();
 841
 842                 if (isset($item['gravity'])) {
 843                         return intval($item['gravity']);
 844                 } elseif ($item['parent-uri-id'] === $item['uri-id']) {
 845                         return self::GRAVITY_PARENT;
 846                 } elseif ($activity->match($item['verb'], Activity::POST)) {
 847                         return self::GRAVITY_COMMENT;
 848                 } elseif ($activity->match($item['verb'], Activity::FOLLOW)) {
 849                         return self::GRAVITY_ACTIVITY;
 850                 } elseif ($activity->match($item['verb'], Activity::ANNOUNCE)) {
 851                         return self::GRAVITY_ACTIVITY;
 852                 }
 853
 854                 Logger::info('Unknown gravity for verb', ['verb' => $item['verb']]);
 855                 return self::GRAVITY_UNKNOWN;   // Should not happen
 856         }
 857
 858         private static function prepareOriginPost(array $item): array
 859         {
 860                 $item = DI::contentItem()->initializePost($item);
 861                 $item = DI::contentItem()->finalizePost($item);
 862
 863                 return $item;
 864         }
 865
 866         /**
 867          * Inserts item record
 868          *
 869          * @param array $item Item array to be inserted
 870          * @param int   $notify Notification (type?)
 871          * @param bool  $post_local (???)
 872          * @return int Zero means error, otherwise primary key (id) is being returned
 873          */
 874         public static function insert(array $item, int $notify = 0, bool $post_local = true): int
 875         {
 876                 $orig_item = $item;
 877
 878                 $priority = Worker::PRIORITY_HIGH;
 879
 880                 // If it is a posting where users should get notifications, then define it as wall posting
 881                 if ($notify) {
 882                         $item = self::prepareOriginPost($item);
 883
 884                         if (is_int($notify) && in_array($notify, Worker::PRIORITIES)) {
 885                                 $priority = $notify;
 886                         }
 887
 888                         // Mastodon style API visibility
 889                         $copy_permissions = ($item['visibility'] ?? 'private') == 'private';
 890                         unset($item['visibility']);
 891                 } else {
 892                         $item['network'] = trim(($item['network'] ?? '') ?: Protocol::PHANTOM);
 893                 }
 894
 895                 $uid = intval($item['uid']);
 896
 897                 $item['guid'] = self::guid($item, $notify);
 898                 $item['uri'] = substr(trim($item['uri'] ?? '') ?: self::newURI($item['guid']), 0, 255);
 899
 900                 // Store URI data
 901                 $item['uri-id'] = ItemURI::insert(['uri' => $item['uri'], 'guid' => $item['guid']]);
 902
 903                 // Backward compatibility: parent-uri used to be the direct parent uri.
 904                 // If it is provided without a thr-parent, it probably is the old behavior.
 905                 if (empty($item['thr-parent']) || empty($item['parent-uri'])) {
 906                         $item['thr-parent'] = trim($item['thr-parent'] ?? $item['parent-uri'] ?? $item['uri']);
 907                         $item['parent-uri'] = $item['thr-parent'];
 908                 }
 909
 910                 $item['thr-parent-id'] = ItemURI::getIdByURI($item['thr-parent']);
 911                 $item['parent-uri-id'] = ItemURI::getIdByURI($item['parent-uri']);
 912
 913                 // Store conversation data
 914                 $source = $item['source'] ?? '';
 915                 unset($item['conversation-uri']);
 916                 unset($item['conversation-href']);
 917                 unset($item['source']);
 918
 919                 /*
 920                  * Do we already have this item?
 921                  * We have to check several networks since Friendica posts could be repeated
 922                  * via OStatus (maybe Diaspora as well)
 923                  */
 924                 $duplicate = self::getDuplicateID($item);
 925                 if ($duplicate) {
 926                         return $duplicate;
 927                 }
 928
 929                 // Additional duplicate checks
 930                 /// @todo Check why the first duplication check returns the item number and the second a 0
 931                 if (self::isDuplicate($item)) {
 932                         return 0;
 933                 }
 934
 935                 if (!isset($item['post-type'])) {
 936                         $item['post-type'] = empty($item['title']) ? self::PT_NOTE : self::PT_ARTICLE;
 937                 }
 938
 939                 $defined_permissions = isset($item['allow_cid']) && isset($item['allow_gid']) && isset($item['deny_cid']) && isset($item['deny_gid']) && isset($item['private']);
 940
 941                 $item['wall']          = intval($item['wall'] ?? 0);
 942                 $item['extid']         = trim($item['extid'] ?? '');
 943                 $item['author-name']   = trim($item['author-name'] ?? '');
 944                 $item['author-link']   = trim($item['author-link'] ?? '');
 945                 $item['author-avatar'] = trim($item['author-avatar'] ?? '');
 946                 $item['owner-name']    = trim($item['owner-name'] ?? '');
 947                 $item['owner-link']    = trim($item['owner-link'] ?? '');
 948                 $item['owner-avatar']  = trim($item['owner-avatar'] ?? '');
 949                 $item['received']      = (isset($item['received'])  ? DateTimeFormat::utc($item['received'])  : DateTimeFormat::utcNow());
 950                 $item['created']       = (isset($item['created'])   ? DateTimeFormat::utc($item['created'])   : $item['received']);
 951                 $item['edited']        = (isset($item['edited'])    ? DateTimeFormat::utc($item['edited'])    : $item['created']);
 952                 $item['changed']       = (isset($item['changed'])   ? DateTimeFormat::utc($item['changed'])   : $item['created']);
 953                 $item['commented']     = (isset($item['commented']) ? DateTimeFormat::utc($item['commented']) : $item['created']);
 954                 $item['title']         = substr(trim($item['title'] ?? ''), 0, 255);
 955                 $item['location']      = trim($item['location'] ?? '');
 956                 $item['coord']         = trim($item['coord'] ?? '');
 957                 $item['visible']       = (isset($item['visible']) ? intval($item['visible']) : 1);
 958                 $item['deleted']       = 0;
 959                 $item['verb']          = trim($item['verb'] ?? '');
 960                 $item['object-type']   = trim($item['object-type'] ?? '');
 961                 $item['object']        = trim($item['object'] ?? '');
 962                 $item['target-type']   = trim($item['target-type'] ?? '');
 963                 $item['target']        = trim($item['target'] ?? '');
 964                 $item['plink']         = substr(trim($item['plink'] ?? ''), 0, 255);
 965                 $item['allow_cid']     = trim($item['allow_cid'] ?? '');
 966                 $item['allow_gid']     = trim($item['allow_gid'] ?? '');
 967                 $item['deny_cid']      = trim($item['deny_cid'] ?? '');
 968                 $item['deny_gid']      = trim($item['deny_gid'] ?? '');
 969                 $item['private']       = intval($item['private'] ?? self::PUBLIC);
 970                 $item['body']          = trim($item['body'] ?? '');
 971                 $item['raw-body']      = trim($item['raw-body'] ?? $item['body']);
 972                 $item['app']           = trim($item['app'] ?? '');
 973                 $item['origin']        = intval($item['origin'] ?? 0);
 974                 $item['postopts']      = trim($item['postopts'] ?? '');
 975                 $item['resource-id']   = trim($item['resource-id'] ?? '');
 976                 $item['event-id']      = intval($item['event-id'] ?? 0);
 977                 $item['inform']        = trim($item['inform'] ?? '');
 978                 $item['file']          = trim($item['file'] ?? '');
 979
 980                 // Communities aren't working with the Diaspora protocol
 981                 if (($uid != 0) && ($item['network'] == Protocol::DIASPORA)) {
 982                         $user = User::getById($uid, ['account-type']);
 983                         if ($user['account-type'] == Contact::TYPE_COMMUNITY) {
 984                                 Logger::info('Community posts are not supported via Diaspora');
 985                                 return 0;
 986                         }
 987                 }
 988
 989                 // Items cannot be stored before they happen ...
 990                 if ($item['created'] > DateTimeFormat::utcNow()) {
 991                         $item['created'] = DateTimeFormat::utcNow();
 992                 }
 993
 994                 // We haven't invented time travel by now.
 995                 if ($item['edited'] > DateTimeFormat::utcNow()) {
 996                         $item['edited'] = DateTimeFormat::utcNow();
 997                 }
 998
 999                 $item['plink'] = ($item['plink'] ?? '') ?: DI::baseUrl() . '/display/' . urlencode($item['guid']);
1000
1001                 $item['gravity'] = self::getGravity($item);
1002
1003                 $default = [
1004                         'url' => $item['author-link'], 'name' => $item['author-name'],
1005                         'photo' => $item['author-avatar'], 'network' => $item['network']
1006                 ];
1007                 $item['author-id'] = ($item['author-id'] ?? 0) ?: Contact::getIdForURL($item['author-link'], 0, null, $default);
1008
1009                 $default = [
1010                         'url' => $item['owner-link'], 'name' => $item['owner-name'],
1011                         'photo' => $item['owner-avatar'], 'network' => $item['network']
1012                 ];
1013                 $item['owner-id'] = ($item['owner-id'] ?? 0) ?: Contact::getIdForURL($item['owner-link'], 0, null, $default);
1014
1015                 $item['post-reason'] = self::getPostReason($item);
1016
1017                 // Ensure that there is an avatar cache
1018                 Contact::checkAvatarCache($item['author-id']);
1019                 Contact::checkAvatarCache($item['owner-id']);
1020
1021                 $item['contact-id'] = self::contactId($item);
1022
1023                 if (
1024                         !empty($item['direction']) && in_array($item['direction'], [Conversation::PUSH, Conversation::RELAY]) &&
1025                         empty($item['origin']) && self::isTooOld($item)
1026                 ) {
1027                         Logger::info('Item is too old', ['item' => $item]);
1028                         return 0;
1029                 }
1030
1031                 if (!self::isValid($item)) {
1032                         return 0;
1033                 }
1034
1035                 if ($item['gravity'] !== self::GRAVITY_PARENT) {
1036                         $toplevel_parent = self::getTopLevelParent($item);
1037                         if (empty($toplevel_parent)) {
1038                                 return 0;
1039                         }
1040
1041                         $parent_id             = $toplevel_parent['id'];
1042                         $item['parent-uri']    = $toplevel_parent['uri'];
1043                         $item['parent-uri-id'] = $toplevel_parent['uri-id'];
1044                         $item['deleted']       = $toplevel_parent['deleted'];
1045                         $item['wall']          = $toplevel_parent['wall'];
1046
1047                         // Reshares have to keep their permissions to allow groups to work
1048                         if (!$defined_permissions && (!$item['origin'] || ($item['verb'] != Activity::ANNOUNCE))) {
1049                                 // Don't store the permissions on pure AP posts
1050                                 $store_permissions = ($item['network'] != Protocol::ACTIVITYPUB) || $item['origin'] || !empty($item['diaspora_signed_text']);
1051                                 $item['allow_cid'] = $store_permissions ? $toplevel_parent['allow_cid'] : '';
1052                                 $item['allow_gid'] = $store_permissions ? $toplevel_parent['allow_gid'] : '';
1053                                 $item['deny_cid']  = $store_permissions ? $toplevel_parent['deny_cid'] : '';
1054                                 $item['deny_gid']  = $store_permissions ? $toplevel_parent['deny_gid'] : '';
1055                         }
1056
1057                         $parent_origin         = $toplevel_parent['origin'];
1058
1059                         // Don't federate received participation messages
1060                         if ($item['verb'] != Activity::FOLLOW) {
1061                                 $item['wall'] = $toplevel_parent['wall'];
1062                         } else {
1063                                 $item['wall'] = false;
1064                                 // Participations are technical messages, so they are set to "seen" automatically
1065                                 $item['unseen'] = false;
1066                         }
1067
1068                         /*
1069                          * If the parent is private, force privacy for the entire conversation
1070                          * This differs from the above settings as it subtly allows comments from
1071                          * email correspondents to be private even if the overall thread is not.
1072                          */
1073                         if (!$defined_permissions && $toplevel_parent['private']) {
1074                                 $item['private'] = $toplevel_parent['private'];
1075                         }
1076
1077                         // If its a post that originated here then tag the thread as "mention"
1078                         if ($item['origin'] && $item['uid']) {
1079                                 DBA::update('post-thread-user', ['mention' => true], ['uri-id' => $item['parent-uri-id'], 'uid' => $item['uid']]);
1080                                 Logger::info('tagged thread as mention', ['parent' => $parent_id, 'parent-uri-id' => $item['parent-uri-id'], 'uid' => $item['uid']]);
1081                         }
1082
1083                         // Update the contact relations
1084                         Contact\Relation::store($toplevel_parent['author-id'], $item['author-id'], $item['created']);
1085                 } else {
1086                         $parent_id = 0;
1087                         $parent_origin = $item['origin'];
1088
1089                         if ($item['wall'] && empty($item['conversation'])) {
1090                                 $item['conversation'] = $item['parent-uri'] . '#context';
1091                         }
1092                 }
1093
1094                 if ($item['origin']) {
1095                         if (
1096                                 Photo::setPermissionFromBody($item['body'], $item['uid'], $item['contact-id'], $item['allow_cid'], $item['allow_gid'], $item['deny_cid'], $item['deny_gid'])
1097                                 && ($item['object-type'] != Activity\ObjectType::EVENT)
1098                         ) {
1099                                 $item['object-type'] = Activity\ObjectType::IMAGE;
1100                         }
1101
1102                         $item = DI::contentItem()->moveAttachmentsFromBodyToAttach($item);
1103                 }
1104
1105                 $item['parent-uri-id'] = ItemURI::getIdByURI($item['parent-uri']);
1106                 $item['thr-parent-id'] = ItemURI::getIdByURI($item['thr-parent']);
1107
1108                 if (!empty($item['conversation']) && empty($item['conversation-id'])) {
1109                         $item['conversation-id'] = ItemURI::getIdByURI($item['conversation']);
1110                 }
1111
1112                 // Is this item available in the global items (with uid=0)?
1113                 if ($item['uid'] == 0) {
1114                         $item['global'] = true;
1115
1116                         // Set the global flag on all items if this was a global item entry
1117                         Post::update(['global' => true], ['uri-id' => $item['uri-id']]);
1118                 } else {
1119                         $item['global'] = Post::exists(['uid' => 0, 'uri-id' => $item['uri-id']]);
1120                 }
1121
1122                 // ACL settings
1123                 if (!$defined_permissions && !empty($item['allow_cid'] . $item['allow_gid'] . $item['deny_cid'] . $item['deny_gid'])) {
1124                         $item['private'] = self::PRIVATE;
1125                 }
1126
1127                 if ($notify && $post_local) {
1128                         $item['edit'] = false;
1129                         $item['parent'] = $parent_id;
1130
1131                         // Trigger automatic reactions for addons
1132                         if (!isset($item['api_source'])) {
1133                                 $item['api_source'] = true;
1134                         }
1135
1136                         // We have to tell the hooks who we are - this really should be improved
1137                         if (!DI::userSession()->getLocalUserId()) {
1138                                 $_SESSION['authenticated'] = true;
1139                                 $_SESSION['uid'] = $uid;
1140                                 $dummy_session = true;
1141                         } else {
1142                                 $dummy_session = false;
1143                         }
1144
1145                         Hook::callAll('post_local', $item);
1146
1147                         if ($dummy_session) {
1148                                 unset($_SESSION['authenticated']);
1149                                 unset($_SESSION['uid']);
1150                         }
1151                 } elseif (!$notify) {
1152                         Hook::callAll('post_remote', $item);
1153                 }
1154
1155                 if (!empty($item['cancel'])) {
1156                         Logger::notice('post cancelled by addon.');
1157                         return 0;
1158                 }
1159
1160                 if (empty($item['vid']) && !empty($item['verb'])) {
1161                         $item['vid'] = Verb::getID($item['verb']);
1162                 }
1163
1164                 // Creates or assigns the permission set
1165                 $item['psid'] = DI::permissionSet()->selectOrCreate(
1166                         DI::permissionSetFactory()->createFromString(
1167                                 $item['uid'],
1168                                 $item['allow_cid'],
1169                                 $item['allow_gid'],
1170                                 $item['deny_cid'],
1171                                 $item['deny_gid']
1172                         )
1173                 )->id;
1174
1175                 if (!empty($item['extid'])) {
1176                         $item['external-id'] = ItemURI::getIdByURI($item['extid']);
1177                 }
1178
1179                 if ($item['verb'] == Activity::ANNOUNCE) {
1180                         self::setOwnerforResharedItem($item);
1181                 }
1182
1183                 if (isset($item['attachments'])) {
1184                         foreach ($item['attachments'] as $attachment) {
1185                                 $attachment['uri-id'] = $item['uri-id'];
1186                                 Post\Media::insert($attachment);
1187                         }
1188                         unset($item['attachments']);
1189                 }
1190
1191                 if (empty($item['quote-uri-id'])) {
1192                         $quote_id = self::getQuoteUriId($item['body']);
1193                         if (!empty($quote_id)) {
1194                                 // This is one of these "should not happen" situations.
1195                                 // The protocol implementations should already have done this job.
1196                                 Logger::notice('Quote-uri-id detected in post', ['id' => $quote_id, 'guid' => $item['guid'], 'uri-id' => $item['uri-id']]);
1197                                 $item['quote-uri-id'] = $quote_id;
1198                         }
1199                 }
1200
1201                 if (!empty($item['quote-uri-id']) && ($item['quote-uri-id'] == $item['uri-id'])) {
1202                         Logger::info('Quote-Uri-Id is identical to Uri-Id', ['uri-id' => $item['uri-id'], 'guid' => $item['guid']]);
1203                         unset($item['quote-uri-id']);
1204                 }
1205
1206                 if (!empty($item['quote-uri-id'])) {
1207                         $item['raw-body'] = BBCode::removeSharedData($item['raw-body']);
1208                         $item['body']     = BBCode::removeSharedData($item['body']);
1209                 }
1210
1211                 // Remove all media attachments from the body and store them in the post-media table
1212                 $item['raw-body'] = Post\Media::insertFromBody($item['uri-id'], $item['raw-body']);
1213                 $item['raw-body'] = self::setHashtags($item['raw-body']);
1214
1215                 $author = Contact::getById($item['author-id'], ['network']);
1216                 Post\Media::insertFromRelevantUrl($item['uri-id'], $item['raw-body'], $item['body'], $author['network'] ?? '');
1217
1218                 Post\Media::insertFromAttachmentData($item['uri-id'], $item['body']);
1219                 $item['body']     = BBCode::removeAttachment($item['body']);
1220                 $item['raw-body'] = BBCode::removeAttachment($item['raw-body']);
1221
1222                 // Check for hashtags in the body and repair or add hashtag links
1223                 $item['body'] = self::setHashtags($item['body']);
1224
1225                 $notify_type = Delivery::POST;
1226
1227                 // Filling item related side tables
1228                 if (!empty($item['attach'])) {
1229                         Post\Media::insertFromAttachment($item['uri-id'], $item['attach']);
1230                 }
1231
1232                 if (empty($item['event-id'])) {
1233                         unset($item['event-id']);
1234
1235                         $ev = Event::fromBBCode($item['body']);
1236                         if ((!empty($ev['desc']) || !empty($ev['summary'])) && !empty($ev['start'])) {
1237                                 Logger::info('Event found.');
1238                                 $ev['cid']       = $item['contact-id'];
1239                                 $ev['uid']       = $item['uid'];
1240                                 $ev['uri']       = $item['uri'];
1241                                 $ev['edited']    = $item['edited'];
1242                                 $ev['private']   = $item['private'];
1243                                 $ev['guid']      = $item['guid'];
1244                                 $ev['plink']     = $item['plink'];
1245                                 $ev['network']   = $item['network'];
1246                                 $ev['protocol']  = $item['protocol'] ?? Conversation::PARCEL_UNKNOWN;
1247                                 $ev['direction'] = $item['direction'] ?? Conversation::UNKNOWN;
1248                                 $ev['source']    = $item['source'] ?? '';
1249
1250                                 $event = DBA::selectFirst('event', ['id'], ['uri' => $item['uri'], 'uid' => $item['uid']]);
1251                                 if (DBA::isResult($event)) {
1252                                         $ev['id'] = $event['id'];
1253                                 }
1254
1255                                 $event_id = Event::store($ev);
1256                                 $item = Event::getItemArrayForImportedId($event_id, $item);
1257
1258                                 Logger::info('Event was stored', ['id' => $event_id]);
1259                         }
1260                 }
1261
1262                 if (empty($item['causer-id'])) {
1263                         unset($item['causer-id']);
1264                 }
1265
1266                 if (in_array($item['network'], [Protocol::ACTIVITYPUB, Protocol::DFRN])) {
1267                         $content_warning = BBCode::getAbstract($item['body'], Protocol::ACTIVITYPUB);
1268                         if (!empty($content_warning) && empty($item['content-warning'])) {
1269                                 $item['content-warning'] = BBCode::toPlaintext($content_warning);
1270                         }
1271                 }
1272
1273                 $item['language'] = self::getLanguage($item);
1274
1275                 $inserted = Post::insert($item['uri-id'], $item);
1276
1277                 if ($item['gravity'] == self::GRAVITY_PARENT) {
1278                         Post\Thread::insert($item['uri-id'], $item);
1279                 }
1280
1281                 // The content of activities normally doesn't matter - except for likes from Misskey
1282                 if (!in_array($item['verb'], self::ACTIVITIES) || in_array($item['verb'], [Activity::LIKE, Activity::DISLIKE]) && !empty($item['body']) && (mb_strlen($item['body']) == 1)) {
1283                         Post\Content::insert($item['uri-id'], $item);
1284                 }
1285
1286                 $item['parent'] = $parent_id;
1287
1288                 // Create Diaspora signature
1289                 if ($item['origin'] && empty($item['diaspora_signed_text']) && ($item['gravity'] != self::GRAVITY_PARENT)) {
1290                         $signed = Diaspora::createCommentSignature($item);
1291                         if (!empty($signed)) {
1292                                 $item['diaspora_signed_text'] = json_encode($signed);
1293                         }
1294                 }
1295
1296                 if (!empty($item['diaspora_signed_text'])) {
1297                         DBA::replace('diaspora-interaction', ['uri-id' => $item['uri-id'], 'interaction' => $item['diaspora_signed_text']]);
1298                 }
1299
1300                 // Attached file links
1301                 if (!empty($item['file'])) {
1302                         Post\Category::storeTextByURIId($item['uri-id'], $item['uid'], $item['file']);
1303                 }
1304
1305                 // Delivery relevant data
1306                 $delivery_data = Post\DeliveryData::extractFields($item);
1307
1308                 if (!empty($item['origin']) || !empty($item['wall']) || !empty($delivery_data['postopts']) || !empty($delivery_data['inform'])) {
1309                         Post\DeliveryData::insert($item['uri-id'], $delivery_data);
1310                 }
1311
1312                 // Store tags from the body if this hadn't been handled previously in the protocol classes
1313                 if (!Tag::existsForPost($item['uri-id'])) {
1314                         Tag::storeFromBody($item['uri-id'], $item['body']);
1315                 }
1316
1317                 $condition = ['uri-id' => $item['uri-id'], 'uid' => $item['uid']];
1318                 if (Post::exists($condition)) {
1319                         Logger::notice('Item is already inserted - aborting', $condition);
1320                         return 0;
1321                 }
1322
1323                 $post_user_id = Post\User::insert($item['uri-id'], $item['uid'], $item);
1324                 if (!$post_user_id) {
1325                         Logger::notice('Post-User is already inserted - aborting', ['uid' => $item['uid'], 'uri-id' => $item['uri-id']]);
1326                         return 0;
1327                 }
1328
1329                 if ($item['gravity'] == self::GRAVITY_PARENT) {
1330                         $item['post-user-id'] = $post_user_id;
1331                         Post\ThreadUser::insert($item['uri-id'], $item['uid'], $item);
1332                 }
1333
1334                 Logger::notice('created item', ['post-id' => $post_user_id, 'uid' => $item['uid'], 'network' => $item['network'], 'uri-id' => $item['uri-id'], 'guid' => $item['guid']]);
1335
1336                 $posted_item = Post::selectFirst(self::ITEM_FIELDLIST, ['post-user-id' => $post_user_id]);
1337                 if (!DBA::isResult($posted_item)) {
1338                         // On failure store the data into a spool file so that the "SpoolPost" worker can try again later.
1339                         Logger::warning('Could not store item. it will be spooled', ['id' => $post_user_id]);
1340                         self::spool($orig_item);
1341                         return 0;
1342                 }
1343
1344                 // update the commented timestamp on the parent
1345                 if (DI::config()->get('system', 'like_no_comment')) {
1346                         // Update when it is a comment
1347                         $update_commented = in_array($posted_item['gravity'], [self::GRAVITY_PARENT, self::GRAVITY_COMMENT]);
1348                 } else {
1349                         // Update when it isn't a follow or tag verb
1350                         $update_commented = !in_array($posted_item['verb'], [Activity::FOLLOW, Activity::TAG]);
1351                 }
1352
1353                 if ($update_commented) {
1354                         $fields = ['commented' => DateTimeFormat::utcNow(), 'changed' => DateTimeFormat::utcNow()];
1355                 } else {
1356                         $fields = ['changed' => DateTimeFormat::utcNow()];
1357                 }
1358
1359                 Post::update($fields, ['uri-id' => $posted_item['parent-uri-id'], 'uid' => $posted_item['uid']]);
1360
1361                 // In that function we check if this is a group post. Additionally we delete the item under certain circumstances
1362                 if (self::tagDeliver($posted_item['uid'], $post_user_id)) {
1363                         // Get the user information for the logging
1364                         $user = User::getById($uid);
1365
1366                         Logger::notice('Item had been deleted', ['id' => $post_user_id, 'user' => $uid, 'account-type' => $user['account-type']]);
1367                         return 0;
1368                 }
1369
1370                 if ($notify) {
1371                         DI::contentItem()->postProcessPost($posted_item);
1372                         if ($copy_permissions && ($posted_item['thr-parent-id'] != $posted_item['uri-id']) && ($posted_item['private'] == self::PRIVATE)) {
1373                                 DI::contentItem()->copyPermissions($posted_item['thr-parent-id'], $posted_item['uri-id'], $posted_item['parent-uri-id']);
1374                         }
1375                 } else {
1376                         Hook::callAll('post_remote_end', $posted_item);
1377                 }
1378
1379                 if ($posted_item['gravity'] === self::GRAVITY_PARENT) {
1380                         self::addShadow($post_user_id);
1381                 } else {
1382                         self::addShadowPost($post_user_id);
1383                 }
1384
1385                 self::updateContact($posted_item);
1386
1387                 Post\UserNotification::setNotification($posted_item['uri-id'], $posted_item['uid']);
1388
1389                 // Distribute items to users who subscribed to their tags
1390                 self::distributeByTags($posted_item);
1391
1392                 // Automatically reshare the item if the "remote_self" option is selected
1393                 self::autoReshare($posted_item);
1394
1395                 $transmit = $notify || ($posted_item['visible'] && ($parent_origin || $posted_item['origin']));
1396
1397                 if ($transmit) {
1398                         if ($posted_item['uid'] && Contact\User::isBlocked($posted_item['author-id'], $posted_item['uid'])) {
1399                                 Logger::info('Message from blocked author will not be relayed', ['item' => $posted_item['id'], 'uri' => $posted_item['uri'], 'cid' => $posted_item['author-id']]);
1400                                 $transmit = false;
1401                         }
1402                         if ($transmit && $posted_item['uid'] && Contact\User::isBlocked($posted_item['owner-id'], $posted_item['uid'])) {
1403                                 Logger::info('Message from blocked owner will not be relayed', ['item' => $posted_item['id'], 'uri' => $posted_item['uri'], 'cid' => $posted_item['owner-id']]);
1404                                 $transmit = false;
1405                         }
1406                         if ($transmit && !empty($posted_item['causer-id']) && $posted_item['uid'] && Contact\User::isBlocked($posted_item['causer-id'], $posted_item['uid'])) {
1407                                 Logger::info('Message from blocked causer will not be relayed', ['item' => $posted_item['id'], 'uri' => $posted_item['uri'], 'cid' => $posted_item['causer-id']]);
1408                                 $transmit = false;
1409                         }
1410
1411                         // Don't relay participation messages
1412                         if (($posted_item['verb'] == Activity::FOLLOW) &&
1413                                 (!$posted_item['origin'] || ($posted_item['author-id'] != Contact::getPublicIdByUserId($uid)))
1414                         ) {
1415                                 Logger::info('Participation messages will not be relayed', ['item' => $posted_item['id'], 'uri' => $posted_item['uri'], 'verb' => $posted_item['verb']]);
1416                                 $transmit = false;
1417                         }
1418                 }
1419
1420                 if (!empty($source) && ($transmit || DI::config()->get('debug', 'store_source'))) {
1421                         Post\Activity::insert($posted_item['uri-id'], $source);
1422                 }
1423
1424                 if ($transmit) {
1425                         ActivityPub\Transmitter::storeReceiversForItem($posted_item);
1426
1427                         Worker::add(['priority' => $priority, 'dont_fork' => true], 'Notifier', $notify_type, (int)$posted_item['uri-id'], (int)$posted_item['uid']);
1428                 }
1429
1430                 // Fill the cache with the rendered content.
1431                 if (in_array($posted_item['gravity'], [self::GRAVITY_PARENT, self::GRAVITY_COMMENT]) && ($posted_item['uid'] == 0)) {
1432                         self::updateDisplayCache($posted_item['uri-id']);
1433                 }
1434
1435                 if ($inserted) {
1436                         Post\Engagement::storeFromItem($posted_item);
1437                 }
1438
1439                 return $post_user_id;
1440         }
1441
1442         /**
1443          * Fetch the post reason for a given item array
1444          *
1445          * @param array $item
1446          *
1447          * @return integer
1448          */
1449         public static function getPostReason(array $item): int
1450         {
1451                 $actor = ($item['gravity'] == self::GRAVITY_PARENT) ? $item['owner-id'] : $item['author-id'];
1452                 if (empty($item['origin']) && ($item['uid'] != 0) && Contact::isSharing($actor, $item['uid'])) {
1453                         return self::PR_FOLLOWER;
1454                 }
1455
1456                 if (!empty($item['origin']) && empty($item['post-reason'])) {
1457                         return self::PR_LOCAL;
1458                 }
1459
1460                 return $item['post-reason'] ?? self::PR_NONE;
1461         }
1462
1463         /**
1464          * Update the display cache
1465          *
1466          * @param integer $uri_id
1467          * @return void
1468          * @throws InternalServerErrorException
1469          * @throws \ImagickException
1470          */
1471         public static function updateDisplayCache(int $uri_id)
1472         {
1473                 $item = Post::selectFirst(self::DISPLAY_FIELDLIST, ['uri-id' => $uri_id]);
1474                 if (!$item) {
1475                         return;
1476                 }
1477
1478                 self::prepareBody($item, false, false, true);
1479         }
1480
1481         /**
1482          * Change the owner of a parent item if it had been shared by a group
1483          *
1484          * (public) group posts in the new format consist of the regular post by the author
1485          * followed by an announce message sent from the group account.
1486          * Changing the owner helps in grouping group posts.
1487          *
1488          * @param array $item
1489          * @return void
1490          */
1491         private static function setOwnerforResharedItem(array $item)
1492         {
1493                 if ($item['uid'] == 0) {
1494                         return;
1495                 }
1496
1497                 $parent = Post::selectFirst(
1498                         ['id', 'causer-id', 'owner-id', 'author-id', 'author-link', 'origin', 'post-reason'],
1499                         ['uri-id' => $item['thr-parent-id'], 'uid' => $item['uid']]
1500                 );
1501                 if (!DBA::isResult($parent)) {
1502                         Logger::error('Parent not found', ['uri-id' => $item['thr-parent-id'], 'uid' => $item['uid']]);
1503                         return;
1504                 }
1505
1506                 $author = Contact::selectFirst(['url', 'contact-type', 'network'], ['id' => $item['author-id']]);
1507                 if (!DBA::isResult($author)) {
1508                         Logger::error('Author not found', ['id' => $item['author-id']]);
1509                         return;
1510                 }
1511
1512                 $self_contact = Contact::selectFirst(['id'], ['uid' => $item['uid'], 'self' => true]);
1513                 $self = !empty($self_contact) ? $self_contact['id'] : 0;
1514
1515                 $cid = Contact::getIdForURL($author['url'], $item['uid']);
1516                 if (empty($cid) || (!Contact::isSharing($cid, $item['uid']) && ($cid != $self))) {
1517                         Logger::info('The resharer is not a following contact: quit', ['resharer' => $author['url'], 'uid' => $item['uid'], 'cid' => $cid]);
1518                         return;
1519                 }
1520
1521                 if ($author['contact-type'] != Contact::TYPE_COMMUNITY) {
1522                         if ($parent['post-reason'] == self::PR_ANNOUNCEMENT) {
1523                                 Logger::info('The parent is already marked as announced: quit', ['causer' => $parent['causer-id'], 'owner' => $parent['owner-id'], 'author' => $parent['author-id'], 'uid' => $item['uid']]);
1524                                 return;
1525                         }
1526
1527                         if (Contact::isSharing($parent['owner-id'], $item['uid'])) {
1528                                 Logger::info('The resharer is no group: quit', ['resharer' => $item['author-id'], 'owner' => $parent['owner-id'], 'author' => $parent['author-id'], 'uid' => $item['uid']]);
1529                                 return;
1530                         }
1531                 }
1532
1533                 self::update(['post-reason' => self::PR_ANNOUNCEMENT, 'causer-id' => $item['author-id']], ['id' => $parent['id']]);
1534                 Logger::info('Set announcement post-reason', ['uri-id' => $item['uri-id'], 'thr-parent-id' => $item['thr-parent-id'], 'uid' => $item['uid']]);
1535         }
1536
1537         /**
1538          * Distribute the given item to users who subscribed to their tags
1539          *
1540          * @param array $item     Processed item
1541          */
1542         private static function distributeByTags(array $item)
1543         {
1544                 if (($item['uid'] != 0) || ($item['gravity'] != self::GRAVITY_PARENT) || !in_array($item['network'], Protocol::FEDERATED)) {
1545                         return;
1546                 }
1547
1548                 $languages = $item['language'] ? array_keys(json_decode($item['language'], true)) : [];
1549
1550                 foreach (Tag::getUIDListByURIId($item['uri-id']) as $uid => $tags) {
1551                         if (!empty($languages)) {
1552                                 $keep = false;
1553                                 $user_languages = User::getWantedLanguages($uid);
1554                                 foreach ($user_languages as $language) {
1555                                         if (in_array($language, $languages)) {
1556                                                 $keep = true;
1557                                         }
1558                                 }
1559                                 if ($keep) {
1560                                         Logger::debug('Wanted languages found', ['uid' => $uid, 'user-languages' => $user_languages, 'item-languages' => $languages]);
1561                                 } else {
1562                                         Logger::debug('No wanted languages found', ['uid' => $uid, 'user-languages' => $user_languages, 'item-languages' => $languages]);
1563                                         continue;
1564                                 }
1565                         }
1566
1567                         $stored = self::storeForUserByUriId($item['uri-id'], $uid, ['post-reason' => self::PR_TAG]);
1568                         Logger::info('Stored item for users', ['uri-id' => $item['uri-id'], 'uid' => $uid, 'stored' => $stored]);
1569                         foreach ($tags as $tag) {
1570                                 $stored = Category::storeFileByURIId($item['uri-id'], $uid, Category::SUBCRIPTION, $tag);
1571                                 Logger::debug('Stored tag subscription for user', ['uri-id' => $item['uri-id'], 'uid' => $uid, $tag, 'stored' => $stored]);
1572                         }
1573                 }
1574         }
1575
1576         /**
1577          * Distributes public items to the receivers
1578          *
1579          * @param integer $itemid      Item ID that should be added
1580          * @param string  $signed_text Original text (for Diaspora signatures), JSON encoded.
1581          * @throws \Exception
1582          */
1583         public static function distribute(int $itemid, string $signed_text = '')
1584         {
1585                 $condition = ["`id` IN (SELECT `parent` FROM `post-user-view` WHERE `id` = ?)", $itemid];
1586                 $parent = Post::selectFirst(['owner-id'], $condition);
1587                 if (!DBA::isResult($parent)) {
1588                         Logger::warning('Item not found', ['condition' => $condition]);
1589                         return;
1590                 }
1591
1592                 // Only distribute public items from native networks
1593                 $condition = [
1594                         'id' => $itemid, 'uid' => 0,
1595                         'network' => array_merge(Protocol::FEDERATED, ['']),
1596                         'visible' => true, 'deleted' => false, 'private' => [self::PUBLIC, self::UNLISTED]
1597                 ];
1598                 $item = Post::selectFirst(array_merge(self::ITEM_FIELDLIST, ['protocol']), $condition);
1599                 if (!DBA::isResult($item)) {
1600                         Logger::warning('Item not found', ['condition' => $condition]);
1601                         return;
1602                 }
1603
1604                 $origin = $item['origin'];
1605
1606                 $users = [];
1607
1608                 /// @todo add a field "pcid" in the contact table that refers to the public contact id.
1609                 $owner = DBA::selectFirst('contact', ['url', 'nurl', 'alias'], ['id' => $parent['owner-id']]);
1610                 if (!DBA::isResult($owner)) {
1611                         return;
1612                 }
1613
1614                 $condition = ['nurl' => $owner['nurl'], 'rel' => [Contact::SHARING, Contact::FRIEND]];
1615                 $contacts = DBA::select('contact', ['uid'], $condition);
1616                 while ($contact = DBA::fetch($contacts)) {
1617                         if ($contact['uid'] == 0) {
1618                                 continue;
1619                         }
1620
1621                         $users[$contact['uid']] = $contact['uid'];
1622                 }
1623                 DBA::close($contacts);
1624
1625                 $condition = ['alias' => $owner['url'], 'rel' => [Contact::SHARING, Contact::FRIEND]];
1626                 $contacts = DBA::select('contact', ['uid'], $condition);
1627                 while ($contact = DBA::fetch($contacts)) {
1628                         if ($contact['uid'] == 0) {
1629                                 continue;
1630                         }
1631
1632                         $users[$contact['uid']] = $contact['uid'];
1633                 }
1634                 DBA::close($contacts);
1635
1636                 if (!empty($owner['alias'])) {
1637                         $condition = ['nurl' => Strings::normaliseLink($owner['alias']), 'rel' => [Contact::SHARING, Contact::FRIEND]];
1638                         $contacts = DBA::select('contact', ['uid'], $condition);
1639                         while ($contact = DBA::fetch($contacts)) {
1640                                 if ($contact['uid'] == 0) {
1641                                         continue;
1642                                 }
1643
1644                                 $users[$contact['uid']] = $contact['uid'];
1645                         }
1646                         DBA::close($contacts);
1647                 }
1648
1649                 $origin_uid = 0;
1650
1651                 if ($item['uri-id'] != $item['parent-uri-id']) {
1652                         $parents = Post::select(['uid', 'origin'], ["`uri-id` = ? AND `uid` != 0", $item['parent-uri-id']]);
1653                         while ($parent = Post::fetch($parents)) {
1654                                 $users[$parent['uid']] = $parent['uid'];
1655                                 if ($parent['origin'] && !$origin) {
1656                                         $origin_uid = $parent['uid'];
1657                                 }
1658                         }
1659                         DBA::close($parents);
1660                 }
1661
1662                 foreach ($users as $uid) {
1663                         if ($origin_uid == $uid) {
1664                                 $item['diaspora_signed_text'] = $signed_text;
1665                         }
1666                         $item['post-reason'] = self::PR_DISTRIBUTE;
1667                         self::storeForUser($item, $uid);
1668                 }
1669         }
1670
1671         /**
1672          * Store a public item defined by their URI-ID for the given users
1673          *
1674          * @param integer $uri_id     URI-ID of the given item
1675          * @param integer $uid        The user that will receive the item entry
1676          * @param array   $fields     Additional fields to be stored
1677          * @param integer $source_uid User id of the source post
1678          * @return integer stored item id
1679          */
1680         public static function storeForUserByUriId(int $uri_id, int $uid, array $fields = [], int $source_uid = 0): int
1681         {
1682                 if ($uid == $source_uid) {
1683                         Logger::warning('target UID must not be be equal to the source UID', ['uri-id' => $uri_id, 'uid' => $uid]);
1684                         return 0;
1685                 }
1686
1687                 $item = Post::selectFirst(array_merge(self::ITEM_FIELDLIST, ['protocol']), ['uri-id' => $uri_id, 'uid' => $source_uid]);
1688                 if (!DBA::isResult($item)) {
1689                         Logger::warning('Item could not be fetched', ['uri-id' => $uri_id, 'uid' => $source_uid]);
1690                         return 0;
1691                 }
1692
1693                 if (($uid != 0) && ($item['gravity'] == self::GRAVITY_PARENT)) {
1694                         $owner = User::getOwnerDataById($uid);
1695                         if (($owner['contact-type'] == User::ACCOUNT_TYPE_COMMUNITY) && !Tag::isMentioned($uri_id, $owner['url'])) {
1696                                 Logger::info('Target user is a group but is not mentioned here, thread will not be stored', ['uid' => $uid, 'uri-id' => $uri_id]);
1697                                 return 0;
1698                         }
1699                 }
1700
1701                 if (($source_uid == 0) && (($item['private'] == self::PRIVATE) || !in_array($item['network'], Protocol::FEDERATED))) {
1702                         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']]);
1703                         return 0;
1704                 }
1705
1706                 $item['post-reason'] = self::PR_STORED;
1707
1708                 $item = array_merge($item, $fields);
1709
1710                 if (($uid != 0) && Contact::isSharing(($item['gravity'] == Item::GRAVITY_PARENT) ? $item['owner-id'] : $item['author-id'], $uid)) {
1711                         $item['post-reason'] = self::PR_FOLLOWER;
1712                 }
1713
1714                 $is_reshare = ($item['gravity'] == self::GRAVITY_ACTIVITY) && ($item['verb'] == Activity::ANNOUNCE);
1715
1716                 if (($uid != 0) && (($item['gravity'] == self::GRAVITY_PARENT) || $is_reshare) &&
1717                         DI::pConfig()->get($uid, 'system', 'accept_only_sharer') == self::COMPLETION_NONE &&
1718                         !in_array($item['post-reason'], [self::PR_FOLLOWER, self::PR_TAG, self::PR_TO, self::PR_CC, self::PR_ACTIVITY, self::PR_AUDIENCE])
1719                 ) {
1720                         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']]);
1721                         return 0;
1722                 }
1723
1724                 $causer = $item['causer-id'] ?: $item['author-id'];
1725
1726                 if (($uri_id != $item['parent-uri-id']) && ($item['gravity'] == self::GRAVITY_COMMENT) && !Post::exists(['uri-id' => $item['parent-uri-id'], 'uid' => $uid])) {
1727                         if (!self::fetchParent($item['parent-uri-id'], $uid, $causer)) {
1728                                 Logger::info('Parent post had not been added', ['uri-id' => $item['parent-uri-id'], 'uid' => $uid, 'causer' => $causer]);
1729                                 return 0;
1730                         }
1731                         Logger::info('Fetched parent post', ['uri-id' => $item['parent-uri-id'], 'uid' => $uid, 'causer' => $causer]);
1732                 } elseif (($uri_id != $item['thr-parent-id']) && $is_reshare && !Post::exists(['uri-id' => $item['thr-parent-id'], 'uid' => $uid])) {
1733                         if (!self::fetchParent($item['thr-parent-id'], $uid, $causer)) {
1734                                 Logger::info('Thread parent had not been added', ['uri-id' => $item['thr-parent-id'], 'uid' => $uid, 'causer' => $causer]);
1735                                 return 0;
1736                         }
1737                         Logger::info('Fetched thread parent', ['uri-id' => $item['thr-parent-id'], 'uid' => $uid, 'causer' => $causer]);
1738                 }
1739
1740                 $stored = self::storeForUser($item, $uid);
1741                 Logger::info('Item stored for user', ['uri-id' => $item['uri-id'], 'uid' => $uid, 'causer' => $causer, 'source-uid' => $source_uid, 'stored' => $stored]);
1742                 return $stored;
1743         }
1744
1745         /**
1746          * Fetch the parent with the given uri-id
1747          *
1748          * @param integer $uri_id
1749          * @param integer $uid
1750          * @param integer $causer
1751          *
1752          * @return integer
1753          */
1754         private static function fetchParent(int $uri_id, int $uid, int $causer): int
1755         {
1756                 // Fetch the origin user for the post
1757                 $origin_uid = self::GetOriginUidForUriId($uri_id, $uid);
1758                 if (is_null($origin_uid)) {
1759                         Logger::info('Origin item was not found', ['uid' => $uid, 'uri-id' => $uri_id]);
1760                         return 0;
1761                 }
1762
1763                 return self::storeForUserByUriId($uri_id, $uid, ['causer-id' => $causer, 'post-reason' => self::PR_FETCHED], $origin_uid);
1764         }
1765
1766         /**
1767          * Returns the origin uid of a post if the given user is allowed to see it.
1768          *
1769          * @param int $uriid
1770          * @param int $uid
1771          * @return int
1772          */
1773         private static function GetOriginUidForUriId(int $uriid, int $uid)
1774         {
1775                 if (Post::exists(['uri-id' => $uriid, 'uid' => $uid])) {
1776                         return $uid;
1777                 }
1778
1779                 $post = Post::selectFirst(['uid', 'allow_cid', 'allow_gid', 'deny_cid', 'deny_gid', 'private'], ['uri-id' => $uriid, 'origin' => true]);
1780                 if (!empty($post)) {
1781                         if (in_array($post['private'], [Item::PUBLIC, Item::UNLISTED])) {
1782                                 return $post['uid'];
1783                         }
1784
1785                         $pcid = Contact::getPublicIdByUserId($uid);
1786                         if (empty($pcid)) {
1787                                 return null;
1788                         }
1789
1790                         foreach (Item::enumeratePermissions($post, true) as $receiver) {
1791                                 if ($receiver == $pcid) {
1792                                         return $post['uid'];
1793                                 }
1794                         }
1795
1796                         return null;
1797                 }
1798
1799                 if (Post::exists(['uri-id' => $uriid, 'uid' => 0])) {
1800                         return 0;
1801                 }
1802
1803                 // When the post belongs to a a group then all group users are allowed to access it
1804                 foreach (Tag::getByURIId($uriid, [Tag::MENTION, Tag::EXCLUSIVE_MENTION]) as $tag) {
1805                         if (DBA::exists('contact', ['uid' => $uid, 'nurl' => Strings::normaliseLink($tag['url']), 'contact-type' => Contact::TYPE_COMMUNITY])) {
1806                                 $target_uid = User::getIdForURL($tag['url']);
1807                                 if (!empty($target_uid)) {
1808                                         return $target_uid;
1809                                 }
1810                         }
1811                 }
1812
1813                 return null;
1814         }
1815
1816         /**
1817          * Store a public item array for the given users
1818          *
1819          * @param array   $item   The item entry that will be stored
1820          * @param integer $uid    The user that will receive the item entry
1821          * @return integer stored item id
1822          * @throws \Exception
1823          */
1824         private static function storeForUser(array $item, int $uid): int
1825         {
1826                 $post = Post::selectFirst(['id'], ['uri-id' => $item['uri-id'], 'uid' => $uid]);
1827                 if (!empty($post['id'])) {
1828                         if (!empty($item['event-id'])) {
1829                                 $event_post = Post::selectFirst(['event-id'], ['uri-id' => $item['uri-id'], 'uid' => $uid]);
1830                                 if (!empty($event_post['event-id'])) {
1831                                         $event = DBA::selectFirst('event', ['edited', 'start', 'finish', 'summary', 'desc', 'location', 'nofinish'], ['id' => $item['event-id']]);
1832                                         if (!empty($event)) {
1833                                                 // We aren't using "Event::store" here, since we don't want to trigger any further action
1834                                                 $ret = DBA::update('event', $event, ['id' => $event_post['event-id']]);
1835                                                 Logger::info('Event updated', ['uid' => $uid, 'source-event' => $item['event-id'], 'target-event' => $event_post['event-id'], 'ret' => $ret]);
1836                                         }
1837                                 }
1838                         }
1839                         Logger::info('Item already exists', ['uri-id' => $item['uri-id'], 'uid' => $uid, 'id' => $post['id']]);
1840                         return $post['id'];
1841                 }
1842
1843                 // Data from the "post-user" table
1844                 unset($item['id']);
1845                 unset($item['mention']);
1846                 unset($item['starred']);
1847                 unset($item['unseen']);
1848                 unset($item['psid']);
1849                 unset($item['pinned']);
1850                 unset($item['ignored']);
1851                 unset($item['pubmail']);
1852                 unset($item['event-id']);
1853                 unset($item['hidden']);
1854                 unset($item['notification-type']);
1855
1856                 // Data from the "post-delivery-data" table
1857                 unset($item['postopts']);
1858                 unset($item['inform']);
1859
1860                 $item['uid'] = $uid;
1861                 $item['origin'] = 0;
1862                 $item['wall'] = 0;
1863
1864                 $notify = false;
1865                 if ($item['gravity'] == self::GRAVITY_PARENT) {
1866                         $contact = DBA::selectFirst('contact', [], ['id' => $item['contact-id'], 'self' => false]);
1867                         if (DBA::isResult($contact)) {
1868                                 $notify = self::isRemoteSelf($contact, $item);
1869                                 $item['wall'] = (bool)$notify;
1870                         }
1871                 }
1872
1873                 $item['contact-id'] = self::contactId($item);
1874                 $distributed = self::insert($item, $notify);
1875
1876                 if (!$distributed) {
1877                         Logger::info("Distributed item wasn't stored", ['uri-id' => $item['uri-id'], 'user' => $uid]);
1878                 } else {
1879                         Logger::info('Distributed item was stored', ['uri-id' => $item['uri-id'], 'user' => $uid, 'stored' => $distributed]);
1880                 }
1881                 return $distributed;
1882         }
1883
1884         /**
1885          * Add a shadow entry for a given item id that is a thread starter
1886          *
1887          * We store every public item entry additionally with the user id "0".
1888          * This is used for the community page and for the search.
1889          * It is planned that in the future we will store public item entries only once.
1890          *
1891          * @param integer $itemid Item ID that should be added
1892          * @throws \Exception
1893          */
1894         private static function addShadow(int $itemid)
1895         {
1896                 $fields = ['uid', 'private', 'visible', 'deleted', 'network', 'uri-id'];
1897                 $condition = ['id' => $itemid, 'gravity' => self::GRAVITY_PARENT];
1898                 $item = Post::selectFirst($fields, $condition);
1899
1900                 if (!DBA::isResult($item)) {
1901                         return;
1902                 }
1903
1904                 // is it already a copy?
1905                 if (($itemid == 0) || ($item['uid'] == 0)) {
1906                         return;
1907                 }
1908
1909                 // Is it a visible public post?
1910                 if (!$item["visible"] || $item["deleted"]  || ($item["private"] == self::PRIVATE)) {
1911                         return;
1912                 }
1913
1914                 // is it an entry from a connector? Only add an entry for natively connected networks
1915                 if (!in_array($item["network"], array_merge(Protocol::FEDERATED, ['']))) {
1916                         return;
1917                 }
1918
1919                 if (Post::exists(['uri-id' => $item['uri-id'], 'uid' => 0])) {
1920                         return;
1921                 }
1922
1923                 $item = Post::selectFirst(array_merge(self::ITEM_FIELDLIST, ['protocol']), ['id' => $itemid]);
1924
1925                 if (DBA::isResult($item)) {
1926                         // Preparing public shadow (removing user specific data)
1927                         $item['uid'] = 0;
1928                         unset($item['id']);
1929                         unset($item['parent']);
1930                         unset($item['wall']);
1931                         unset($item['mention']);
1932                         unset($item['origin']);
1933                         unset($item['starred']);
1934                         unset($item['postopts']);
1935                         unset($item['inform']);
1936                         unset($item['post-reason']);
1937                         if ($item['uri-id'] == $item['parent-uri-id']) {
1938                                 $item['contact-id'] = $item['owner-id'];
1939                         } else {
1940                                 $item['contact-id'] = $item['author-id'];
1941                         }
1942
1943                         $public_shadow = self::insert($item);
1944
1945                         Logger::info('Stored public shadow', ['thread' => $itemid, 'id' => $public_shadow]);
1946                 }
1947         }
1948
1949         /**
1950          * Add a shadow entry for a given item id that is a comment
1951          *
1952          * This function does the same like the function above - but for comments
1953          *
1954          * @param integer $itemid Item ID that should be added
1955          * @throws \Exception
1956          */
1957         private static function addShadowPost(int $itemid)
1958         {
1959                 $item = Post::selectFirst(array_merge(self::ITEM_FIELDLIST, ['protocol']), ['id' => $itemid]);
1960                 if (!DBA::isResult($item)) {
1961                         return;
1962                 }
1963
1964                 // Is it a toplevel post?
1965                 if ($item['gravity'] == self::GRAVITY_PARENT) {
1966                         self::addShadow($itemid);
1967                         return;
1968                 }
1969
1970                 // Is this a shadow entry?
1971                 if ($item['uid'] == 0) {
1972                         return;
1973                 }
1974
1975                 // Is there a shadow parent?
1976                 if (!Post::exists(['uri-id' => $item['parent-uri-id'], 'uid' => 0])) {
1977                         return;
1978                 }
1979
1980                 // Is there already a shadow entry?
1981                 if (Post::exists(['uri-id' => $item['uri-id'], 'uid' => 0])) {
1982                         return;
1983                 }
1984
1985                 // Save "origin" and "parent" state
1986                 $origin = $item['origin'];
1987                 $parent = $item['parent'];
1988
1989                 // Preparing public shadow (removing user specific data)
1990                 $item['uid'] = 0;
1991                 unset($item['id']);
1992                 unset($item['parent']);
1993                 unset($item['wall']);
1994                 unset($item['mention']);
1995                 unset($item['origin']);
1996                 unset($item['starred']);
1997                 unset($item['postopts']);
1998                 unset($item['inform']);
1999                 unset($item['post-reason']);
2000                 $item['contact-id'] = Contact::getIdForURL($item['author-link']);
2001
2002                 $public_shadow = self::insert($item);
2003
2004                 Logger::info('Stored public shadow', ['uri-id' => $item['uri-id'], 'id' => $public_shadow]);
2005
2006                 // If this was a comment to a Diaspora post we don't get our comment back.
2007                 // This means that we have to distribute the comment by ourselves.
2008                 if ($origin && Post::exists(['id' => $parent, 'network' => Protocol::DIASPORA])) {
2009                         self::distribute($public_shadow);
2010                 }
2011         }
2012
2013         /**
2014          * Adds a language specification in a "language" element of given $arr.
2015          * Expects "body" element to exist in $arr.
2016          *
2017          * @param array $item
2018          * @return string detected language
2019          * @throws \Text_LanguageDetect_Exception
2020          */
2021         private static function getLanguage(array $item): ?string
2022         {
2023                 if (!empty($item['language'])) {
2024                         return $item['language'];
2025                 }
2026
2027                 $transmitted = [];
2028                 foreach ($item['transmitted-languages'] ??  [] as $language) {
2029                         $transmitted[$language] = 0;
2030                 }
2031
2032                 $content = trim(($item['title'] ?? '') . ' ' . ($item['content-warning'] ?? '') . ' ' . ($item['body'] ?? ''));
2033
2034                 if (!in_array($item['gravity'], [self::GRAVITY_PARENT, self::GRAVITY_COMMENT]) || empty($content)) {
2035                         return !empty($transmitted) ? json_encode($transmitted) : null;
2036                 }
2037
2038                 $languages = self::getLanguageArray($content, 3, $item['uri-id'], $item['author-id']);
2039                 if (empty($languages)) {
2040                         return !empty($transmitted) ? json_encode($transmitted) : null;
2041                 }
2042
2043                 if (!empty($transmitted)) {
2044                         $languages = array_merge($transmitted, $languages);
2045                         arsort($languages);
2046                 }
2047
2048                 return json_encode($languages);
2049         }
2050
2051         /**
2052          * Get a language array from a given text
2053          *
2054          * @param string  $body
2055          * @param integer $count
2056          * @param integer $uri_id
2057          * @param integer $author_id
2058          * @return array
2059          */
2060         public static function getLanguageArray(string $body, int $count, int $uri_id = 0, int $author_id = 0): array
2061         {
2062                 $searchtext = BBCode::toSearchText($body, $uri_id);
2063
2064                 if ((count(explode(' ', $searchtext)) < 10) && (mb_strlen($searchtext) < 30) && $author_id) {
2065                         $author = Contact::selectFirst(['about'], ['id' => $author_id]);
2066                         if (!empty($author['about'])) {
2067                                 $about = BBCode::toSearchText($author['about'], 0);
2068                                 Logger::debug('About field added', ['author' => $author_id, 'body' => $searchtext, 'about' => $about]);
2069                                 $searchtext .= ' ' . $about;
2070                         }
2071                 }
2072
2073                 if (empty($searchtext)) {
2074                         return [];
2075                 }
2076
2077                 $ld = new Language(DI::l10n()->getDetectableLanguages());
2078
2079                 $result = [];
2080
2081                 foreach (self::splitByBlocks($searchtext) as $block) {
2082                         $languages = $ld->detect($block)->close() ?: [];
2083
2084                         $data = [
2085                                 'text'      => $block,
2086                                 'detected'  => $languages,
2087                                 'uri-id'    => $uri_id,
2088                                 'author-id' => $author_id,
2089                         ];
2090                         Hook::callAll('detect_languages', $data);
2091
2092                         foreach ($data['detected'] as $language => $quality) {
2093                                 $result[$language] = max($result[$language] ?? 0, $quality * (strlen($block) / strlen($searchtext)));
2094                         }
2095                 }
2096
2097                 $result = self::compactLanguages($result);
2098
2099                 arsort($result);
2100                 return array_slice($result, 0, $count);
2101         }
2102
2103         /**
2104          * Concert the language code in the detection result to ISO 639-1.
2105          * On duplicates the system uses the higher quality value.
2106          *
2107          * @param array $result
2108          * @return array
2109          */
2110         private static function compactLanguages(array $result): array
2111         {
2112                 $languages = [];
2113                 foreach ($result as $language => $quality) {
2114                         if ($quality == 0) {
2115                                 continue;
2116                         }
2117                         $code = DI::l10n()->toISO6391($language);
2118                         if (empty($languages[$code]) || ($languages[$code] < $quality)) {
2119                                 $languages[$code] = $quality;
2120                         }
2121                 }
2122                 return $languages;
2123         }
2124
2125         /**
2126          * Split a string into different unicode blocks
2127          * Currently the text is split into the latin and the non latin part.
2128          *
2129          * @param string $body
2130          * @return array
2131          */
2132         private static function splitByBlocks(string $body): array
2133         {
2134                 if (!class_exists('IntlChar')) {
2135                         return [$body];
2136                 }
2137
2138                 $blocks         = [];
2139                 $previous_block = 0;
2140
2141                 for ($i = 0; $i < mb_strlen($body); $i++) {
2142                         $character = mb_substr($body, $i, 1);
2143                         $previous  = ($i > 0) ? mb_substr($body, $i - 1, 1) : '';
2144                         $next      = ($i < mb_strlen($body)) ? mb_substr($body, $i + 1, 1) : '';
2145
2146                         if (!\IntlChar::isalpha($character)) {
2147                                 if (($previous != '') && (\IntlChar::isalpha($previous))) {
2148                                         $previous_block = self::getBlockCode($previous);
2149                                 }
2150
2151                                 $block = (($next != '') && \IntlChar::isalpha($next)) ? self::getBlockCode($next) : $previous_block;
2152                                 $blocks[$block] = ($blocks[$block] ?? '') . $character;
2153                         } else {
2154                                 $block = self::getBlockCode($character);
2155                                 $blocks[$block] = ($blocks[$block] ?? '') . $character;
2156                         }
2157                 }
2158
2159                 foreach (array_keys($blocks) as $key) {
2160                         $blocks[$key] = trim($blocks[$key]);
2161                         if (empty($blocks[$key])) {
2162                                 unset($blocks[$key]);
2163                         }
2164                 }
2165
2166                 return array_values($blocks);
2167         }
2168
2169         /**
2170          * returns the block code for the given character
2171          *
2172          * @param string $character
2173          * @return integer 0 = no alpha character (blank, signs, emojis, ...), 1 = latin character, 2 = character in every other language
2174          */
2175         private static function getBlockCode(string $character): int
2176         {
2177                 if (!\IntlChar::isalpha($character)) {
2178                         return 0;
2179                 }
2180                 return self::isLatin($character) ? 1 : 2;
2181         }
2182
2183         /**
2184          * Checks if the given character is in one of the latin code blocks
2185          *
2186          * @param string $character
2187          * @return boolean
2188          */
2189         private static function isLatin(string $character): bool
2190         {
2191                 return in_array(\IntlChar::getBlockCode($character), [
2192                         \IntlChar::BLOCK_CODE_BASIC_LATIN, \IntlChar::BLOCK_CODE_LATIN_1_SUPPLEMENT,
2193                         \IntlChar::BLOCK_CODE_LATIN_EXTENDED_A, \IntlChar::BLOCK_CODE_LATIN_EXTENDED_B,
2194                         \IntlChar::BLOCK_CODE_LATIN_EXTENDED_C, \IntlChar::BLOCK_CODE_LATIN_EXTENDED_D,
2195                         \IntlChar::BLOCK_CODE_LATIN_EXTENDED_E, \IntlChar::BLOCK_CODE_LATIN_EXTENDED_ADDITIONAL
2196                 ]);
2197         }
2198
2199         public static function getLanguageMessage(array $item): string
2200         {
2201                 $iso639 = new \Matriphe\ISO639\ISO639;
2202
2203                 $used_languages = '';
2204                 foreach (json_decode($item['language'], true) as $language => $reliability) {
2205                         $code = DI::l10n()->toISO6391($language);
2206
2207                         $native   = $iso639->nativeByCode1($code);
2208                         $language = $iso639->languageByCode1($code);
2209                         if ($native != $language) {
2210                                 $used_languages .= DI::l10n()->t('%s (%s - %s): %s', $native, $language, $code, number_format($reliability, 5)) . '\n';
2211                         } else {
2212                                 $used_languages .= DI::l10n()->t('%s (%s): %s', $native, $code, number_format($reliability, 5)) . '\n';
2213                         }
2214                 }
2215                 $used_languages = DI::l10n()->t('Detected languages in this post:\n%s', $used_languages);
2216                 return $used_languages;
2217         }
2218
2219         /**
2220          * Creates an unique guid out of a given uri.
2221          * This function is used for messages outside the fediverse (Connector posts, feeds, Mails, ...)
2222          * Posts that are created on this system are using System::createUUID.
2223          * Received ActivityPub posts are using Processor::getGUIDByURL.
2224          *
2225          * @param string      $uri  uri of an item entry
2226          * @param string|null $host hostname for the GUID prefix
2227          * @return string Unique guid
2228          * @throws \Exception
2229          */
2230         public static function guidFromUri(string $uri, string $host = null): string
2231         {
2232                 // Our regular guid routine is using this kind of prefix as well
2233                 // We have to avoid that different routines could accidentally create the same value
2234                 $parsed = parse_url($uri);
2235
2236                 // Remove the scheme to make sure that "https" and "http" doesn't make a difference
2237                 unset($parsed['scheme']);
2238
2239                 $hostPart = $host ?: $parsed['host'] ?? '';
2240                 if (!$hostPart) {
2241                         Logger::warning('Empty host GUID part', ['uri' => $uri, 'host' => $host, 'parsed' => $parsed]);
2242                 }
2243
2244                 // Glue it together to be able to make a hash from it
2245                 if (!empty($parsed)) {
2246                         $host_id = implode('/', (array)$parsed);
2247                 } else {
2248                         $host_id = $uri;
2249                 }
2250
2251                 // Use a mixture of several hashes to provide some GUID like experience
2252                 return hash('crc32', $hostPart) . '-' . hash('joaat', $host_id) . '-' . hash('fnv164', $host_id);
2253         }
2254
2255         /**
2256          * generate an unique URI
2257          *
2258          * @param string $guid An existing GUID (Otherwise it will be generated)
2259          *
2260          * @return string
2261          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
2262          */
2263         public static function newURI(string $guid = ''): string
2264         {
2265                 if ($guid == '') {
2266                         $guid = System::createUUID();
2267                 }
2268
2269                 return DI::baseUrl() . '/objects/' . $guid;
2270         }
2271
2272         /**
2273          * Set "success_update" and "last-item" to the date of the last time we heard from this contact
2274          *
2275          * This can be used to filter for inactive contacts.
2276          * Only do this for public postings to avoid privacy problems, since poco data is public.
2277          * Don't set this value if it isn't from the owner (could be an author that we don't know)
2278          *
2279          * @param array $arr Contains the just posted item record
2280          * @throws \Exception
2281          */
2282         private static function updateContact(array $arr)
2283         {
2284                 // Unarchive the author
2285                 $contact = DBA::selectFirst('contact', [], ['id' => $arr["author-id"]]);
2286                 if (DBA::isResult($contact)) {
2287                         Contact::unmarkForArchival($contact);
2288                 }
2289
2290                 // Unarchive the contact if it's not our own contact
2291                 $contact = DBA::selectFirst('contact', [], ['id' => $arr["contact-id"], 'self' => false]);
2292                 if (DBA::isResult($contact)) {
2293                         Contact::unmarkForArchival($contact);
2294                 }
2295
2296                 /// @todo On private posts we could obfuscate the date
2297                 $update = ($arr['private'] != self::PRIVATE) || in_array($arr['network'], Protocol::FEDERATED);
2298
2299                 // Is it a group? Then we don't care about the rules from above
2300                 if (!$update && in_array($arr["network"], [Protocol::ACTIVITYPUB, Protocol::DFRN]) && ($arr["parent-uri-id"] === $arr["uri-id"])) {
2301                         if (DBA::exists('contact', ['id' => $arr['contact-id'], 'forum' => true])) {
2302                                 $update = true;
2303                         }
2304                 }
2305
2306                 if ($update) {
2307                         // The "self" contact id is used (for example in the connectors) when the contact is unknown
2308                         // So we have to ensure to only update the last item when it had been our own post,
2309                         // or it had been done by a "regular" contact.
2310                         if (!empty($arr['wall'])) {
2311                                 $condition = ['id' => $arr['contact-id']];
2312                         } else {
2313                                 $condition = ['id' => $arr['contact-id'], 'self' => false];
2314                         }
2315                         Contact::update(['failed' => false, 'local-data' => true, 'success_update' => $arr['received'], 'last-item' => $arr['received']], $condition);
2316                 }
2317                 // Now do the same for the system wide contacts with uid=0
2318                 if ($arr['private'] != self::PRIVATE) {
2319                         Contact::update(
2320                                 ['failed' => false, 'local-data' => true, 'success_update' => $arr['received'], 'last-item' => $arr['received']],
2321                                 ['id' => $arr['owner-id']]
2322                         );
2323
2324                         if ($arr['owner-id'] != $arr['author-id']) {
2325                                 Contact::update(
2326                                         ['failed' => false, 'local-data' => true, 'success_update' => $arr['received'], 'last-item' => $arr['received']],
2327                                         ['id' => $arr['author-id']]
2328                                 );
2329                         }
2330                 }
2331         }
2332
2333         public static function setHashtags(string $body): string
2334         {
2335                 $body = BBCode::performWithEscapedTags($body, ['noparse', 'pre', 'code', 'img'], function ($body) {
2336                         $tags = BBCode::getTags($body);
2337
2338                         // No hashtags?
2339                         if (!count($tags)) {
2340                                 return $body;
2341                         }
2342
2343                         // This sorting is important when there are hashtags that are part of other hashtags
2344                         // Otherwise there could be problems with hashtags like #test and #test2
2345                         // Because of this we are sorting from the longest to the shortest tag.
2346                         usort($tags, function ($a, $b) {
2347                                 return strlen($b) <=> strlen($a);
2348                         });
2349
2350                         $URLSearchString = "^\[\]";
2351
2352                         // All hashtags should point to the home server if "local_tags" is activated
2353                         if (DI::config()->get('system', 'local_tags')) {
2354                                 $body = preg_replace(
2355                                         "/#\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",
2356                                         "#[url=" . DI::baseUrl() . "/search?tag=$2]$2[/url]",
2357                                         $body
2358                                 );
2359                         }
2360
2361                         // mask hashtags inside of url, bookmarks and attachments to avoid urls in urls
2362                         $body = preg_replace_callback(
2363                                 "/\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",
2364                                 function ($match) {
2365                                         return ("[url=" . str_replace("#", "&num;", $match[1]) . "]" . str_replace("#", "&num;", $match[2]) . "[/url]");
2366                                 },
2367                                 $body
2368                         );
2369
2370                         $body = preg_replace_callback(
2371                                 "/\[bookmark\=([$URLSearchString]*)\](.*?)\[\/bookmark\]/ism",
2372                                 function ($match) {
2373                                         return ("[bookmark=" . str_replace("#", "&num;", $match[1]) . "]" . str_replace("#", "&num;", $match[2]) . "[/bookmark]");
2374                                 },
2375                                 $body
2376                         );
2377
2378                         $body = preg_replace_callback(
2379                                 "/\[attachment (.*?)\](.*?)\[\/attachment\]/ism",
2380                                 function ($match) {
2381                                         return ("[attachment " . str_replace("#", "&num;", $match[1]) . "]" . $match[2] . "[/attachment]");
2382                                 },
2383                                 $body
2384                         );
2385
2386                         // Repair recursive urls
2387                         $body = preg_replace(
2388                                 "/&num;\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",
2389                                 "&num;$2",
2390                                 $body
2391                         );
2392
2393                         foreach ($tags as $tag) {
2394                                 if ((strpos($tag, '#') !== 0) || strpos($tag, '[url=') || strlen($tag) < 2 || $tag[1] == '#') {
2395                                         continue;
2396                                 }
2397
2398                                 $basetag = str_replace('_', ' ', substr($tag, 1));
2399                                 $newtag = '#[url=' . DI::baseUrl() . '/search?tag=' . $basetag . ']' . $basetag . '[/url]';
2400
2401                                 $body = str_replace($tag, $newtag, $body);
2402                         }
2403
2404                         // Convert back the masked hashtags
2405                         $body = str_replace("&num;", "#", $body);
2406
2407                         return $body;
2408                 });
2409
2410                 return $body;
2411         }
2412
2413         /**
2414          * look for mention tags and setup a second delivery chain for group/community posts if appropriate
2415          *
2416          * @param int $uid
2417          * @param int $item_id
2418          * @return boolean true if item was deleted, else false
2419          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
2420          * @throws \ImagickException
2421          */
2422         private static function tagDeliver(int $uid, int $item_id): bool
2423         {
2424                 $owner = User::getOwnerDataById($uid);
2425                 if (!DBA::isResult($owner)) {
2426                         Logger::warning('User not found, quitting here.', ['uid' => $uid]);
2427                         return false;
2428                 }
2429
2430                 if ($owner['contact-type'] != User::ACCOUNT_TYPE_COMMUNITY) {
2431                         Logger::debug('Owner is no community, quitting here.', ['uid' => $uid, 'id' => $item_id]);
2432                         return false;
2433                 }
2434
2435                 $item = Post::selectFirst(self::ITEM_FIELDLIST, ['id' => $item_id, 'gravity' => [self::GRAVITY_PARENT, self::GRAVITY_COMMENT], 'origin' => false]);
2436                 if (!DBA::isResult($item)) {
2437                         Logger::debug('Post is an activity or origin or not found at all, quitting here.', ['id' => $item_id]);
2438                         return false;
2439                 }
2440
2441                 if ($item['gravity'] == self::GRAVITY_PARENT) {
2442                         if (Tag::isMentioned($item['uri-id'], $owner['url'])) {
2443                                 Logger::info('Mention found in tag.', ['uri' => $item['uri'], 'uid' => $uid, 'id' => $item_id, 'uri-id' => $item['uri-id'], 'guid' => $item['guid']]);
2444                         } else {
2445                                 Logger::info('Top-level post without mention is deleted.', ['uri' => $item['uri'], $uid, 'id' => $item_id, 'uri-id' => $item['uri-id'], 'guid' => $item['guid']]);
2446                                 Post\User::delete(['uri-id' => $item['uri-id'], 'uid' => $item['uid']]);
2447                                 return true;
2448                         }
2449
2450                         $arr = ['item' => $item, 'user' => $owner];
2451
2452                         Hook::callAll('tagged', $arr);
2453                 } else {
2454                         if (Tag::isMentioned($item['parent-uri-id'], $owner['url'])) {
2455                                 Logger::info('Mention found in parent tag.', ['uri' => $item['uri'], 'uid' => $uid, 'id' => $item_id, 'uri-id' => $item['uri-id'], 'guid' => $item['guid']]);
2456                         } else {
2457                                 Logger::debug('No mentions found in parent, quitting here.', ['id' => $item_id, 'uri-id' => $item['uri-id'], 'guid' => $item['guid']]);
2458                                 return false;
2459                         }
2460                 }
2461
2462                 Logger::info('Community post will be distributed', ['uri' => $item['uri'], 'uid' => $uid, 'id' => $item_id, 'uri-id' => $item['uri-id'], 'guid' => $item['guid']]);
2463
2464                 if ($owner['page-flags'] == User::PAGE_FLAGS_PRVGROUP) {
2465                         $allow_cid = '';
2466                         $allow_gid = '<' . Circle::FOLLOWERS . '>';
2467                         $deny_cid  = '';
2468                         $deny_gid  = '';
2469                         self::performActivity($item['id'], 'announce', $uid, $allow_cid, $allow_gid, $deny_cid, $deny_gid);
2470                 } else {
2471                         self::performActivity($item['id'], 'announce', $uid);
2472                 }
2473
2474                 Logger::info('Community post had been distributed', ['uri' => $item['uri'], 'uid' => $uid, 'id' => $item_id, 'uri-id' => $item['uri-id'], 'guid' => $item['guid']]);
2475                 return false;
2476         }
2477
2478         /**
2479          * Automatically reshare the item if the "remote_self" option is selected
2480          *
2481          * @param array $item
2482          * @return void
2483          */
2484         private static function autoReshare(array $item)
2485         {
2486                 if ($item['gravity'] != self::GRAVITY_PARENT) {
2487                         return;
2488                 }
2489
2490                 $cdata = Contact::getPublicAndUserContactID($item['author-id'], $item['uid']);
2491                 if (empty($cdata['user']) || ($cdata['user'] != $item['contact-id'])) {
2492                         return;
2493                 }
2494
2495                 if (!DBA::exists('contact', ['id' => $cdata['user'], 'remote_self' => LocalRelationship::MIRROR_NATIVE_RESHARE])) {
2496                         return;
2497                 }
2498
2499                 if (!in_array($item['network'], [Protocol::ACTIVITYPUB, Protocol::DFRN])) {
2500                         return;
2501                 }
2502
2503                 if (User::getById($item['uid'], ['blocked'])['blocked'] ?? false) {
2504                         return;
2505                 }
2506
2507                 Logger::info('Automatically reshare item', ['uid' => $item['uid'], 'id' => $item['id'], 'guid' => $item['guid'], 'uri-id' => $item['uri-id']]);
2508
2509                 self::performActivity($item['id'], 'announce', $item['uid']);
2510         }
2511
2512         public static function isRemoteSelf(array $contact, array &$datarray): bool
2513         {
2514                 if ($contact['remote_self'] != LocalRelationship::MIRROR_OWN_POST) {
2515                         return false;
2516                 }
2517
2518                 // Prevent the forwarding of posts that are forwarded
2519                 if (!empty($datarray['extid']) && ($datarray['extid'] == Protocol::DFRN)) {
2520                         Logger::info('Already forwarded');
2521                         return false;
2522                 }
2523
2524                 // Prevent to forward already forwarded posts
2525                 if ($datarray['app'] == DI::baseUrl()->getHost()) {
2526                         Logger::info('Already forwarded (second test)');
2527                         return false;
2528                 }
2529
2530                 // Only forward posts
2531                 if ($datarray['verb'] != Activity::POST) {
2532                         Logger::info('No post');
2533                         return false;
2534                 }
2535
2536                 if (($contact['network'] != Protocol::FEED) && ($datarray['private'] == self::PRIVATE)) {
2537                         Logger::info('Not public');
2538                         return false;
2539                 }
2540
2541                 if (User::getById($contact['uid'], ['blocked'])['blocked'] ?? false) {
2542                         Logger::info('User is blocked', ['contact' => $contact]);
2543                         return false;
2544                 }
2545
2546                 $datarray2 = $datarray;
2547                 Logger::info('remote-self start', ['contact' => $contact['url'], 'remote_self' => $contact['remote_self'], 'item' => $datarray]);
2548
2549                 $self = DBA::selectFirst(
2550                         'contact',
2551                         ['id', 'name', 'url', 'thumb'],
2552                         ['uid' => $contact['uid'], 'self' => true]
2553                 );
2554                 if (!DBA::isResult($self)) {
2555                         Logger::error('Self contact not found', ['uid' => $contact['uid']]);
2556                         return false;
2557                 }
2558
2559                 $datarray['contact-id'] = $self['id'];
2560
2561                 $datarray['author-name']   = $datarray['owner-name']   = $self['name'];
2562                 $datarray['author-link']   = $datarray['owner-link']   = $self['url'];
2563                 $datarray['author-avatar'] = $datarray['owner-avatar'] = $self['thumb'];
2564
2565                 unset($datarray['edited']);
2566
2567                 unset($datarray['network']);
2568                 unset($datarray['owner-id']);
2569                 unset($datarray['author-id']);
2570
2571                 if ($contact['network'] != Protocol::FEED) {
2572                         $old_uri_id = $datarray['uri-id'] ?? 0;
2573                         $datarray['guid'] = System::createUUID();
2574                         unset($datarray['plink']);
2575                         $datarray['uri'] = self::newURI($datarray['guid']);
2576                         $datarray['uri-id'] = ItemURI::getIdByURI($datarray['uri']);
2577                         $datarray['extid'] = Protocol::DFRN;
2578                         $urlpart = parse_url($datarray2['author-link']);
2579                         $datarray['app'] = $urlpart['host'];
2580                         if (!empty($old_uri_id)) {
2581                                 Post\Media::copy($old_uri_id, $datarray['uri-id']);
2582                         }
2583
2584                         unset($datarray['parent-uri']);
2585                         unset($datarray['thr-parent']);
2586
2587                         // Store the original post
2588                         $result = self::insert($datarray2);
2589                         Logger::info('remote-self post original item', ['contact' => $contact['url'], 'result' => $result, 'item' => $datarray2]);
2590                 } else {
2591                         $datarray['app'] = 'Feed';
2592                         $result = true;
2593                 }
2594
2595                 if ($result) {
2596                         unset($datarray['private']);
2597                 }
2598
2599                 return (bool)$result;
2600         }
2601
2602         /**
2603          *
2604          * @param string $s
2605          * @param int    $uid
2606          * @param array  $item
2607          * @param int    $cid
2608          * @return string
2609          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
2610          * @throws \ImagickException
2611          */
2612         public static function fixPrivatePhotos(string $s, int $uid, array $item = null, int $cid = 0): string
2613         {
2614                 if (DI::config()->get('system', 'disable_embedded')) {
2615                         return $s;
2616                 }
2617
2618                 Logger::info('check for photos');
2619                 $site = substr(DI::baseUrl(), strpos(DI::baseUrl(), '://'));
2620
2621                 $orig_body = $s;
2622                 $new_body = '';
2623
2624                 $img_start = strpos($orig_body, '[img');
2625                 $img_st_close = ($img_start !== false ? strpos(substr($orig_body, $img_start), ']') : false);
2626                 $img_len = ($img_start !== false ? strpos(substr($orig_body, $img_start + $img_st_close + 1), '[/img]') : false);
2627
2628                 while (($img_st_close !== false) && ($img_len !== false)) {
2629                         $img_st_close++; // make it point to AFTER the closing bracket
2630                         $image = substr($orig_body, $img_start + $img_st_close, $img_len);
2631
2632                         Logger::info('found photo', ['image' => $image]);
2633
2634                         if (stristr($image, $site . '/photo/')) {
2635                                 // Only embed locally hosted photos
2636                                 $replace = false;
2637                                 $i = basename($image);
2638                                 $i = str_replace(['.jpg', '.png', '.gif'], ['', '', ''], $i);
2639                                 $x = strpos($i, '-');
2640
2641                                 if ($x) {
2642                                         $res = substr($i, $x + 1);
2643                                         $i = substr($i, 0, $x);
2644                                         $photo = Photo::getPhotoForUser($uid, $i, $res);
2645                                         if (DBA::isResult($photo)) {
2646                                                 /*
2647                                                  * Check to see if we should replace this photo link with an embedded image
2648                                                  * 1. No need to do so if the photo is public
2649                                                  * 2. If there's a contact-id provided, see if they're in the access list
2650                                                  *    for the photo. If so, embed it.
2651                                                  * 3. Otherwise, if we have an item, see if the item permissions match the photo
2652                                                  *    permissions, regardless of order but first check to see if they're an exact
2653                                                  *    match to save some processing overhead.
2654                                                  */
2655                                                 if (self::hasPermissions($photo)) {
2656                                                         if ($cid) {
2657                                                                 $recips = self::enumeratePermissions($photo);
2658                                                                 if (in_array($cid, $recips)) {
2659                                                                         $replace = true;
2660                                                                 }
2661                                                         } elseif ($item) {
2662                                                                 if (self::samePermissions($uid, $item, $photo)) {
2663                                                                         $replace = true;
2664                                                                 }
2665                                                         }
2666                                                 }
2667                                                 if ($replace) {
2668                                                         $photo_img = Photo::getImageForPhoto($photo);
2669                                                         // If a custom width and height were specified, apply before embedding
2670                                                         if (preg_match("/\[img\=([0-9]*)x([0-9]*)\]/is", substr($orig_body, $img_start, $img_st_close), $match)) {
2671                                                                 Logger::info('scaling photo');
2672
2673                                                                 $width = intval($match[1]);
2674                                                                 $height = intval($match[2]);
2675
2676                                                                 $photo_img->scaleDown(max($width, $height));
2677                                                         }
2678
2679                                                         $data = $photo_img->asString();
2680                                                         $type = $photo_img->getType();
2681
2682                                                         Logger::info('replacing photo');
2683                                                         $image = 'data:' . $type . ';base64,' . base64_encode($data);
2684                                                         Logger::debug('replaced', ['image' => $image]);
2685                                                 }
2686                                         }
2687                                 }
2688                         }
2689
2690                         $new_body = $new_body . substr($orig_body, 0, $img_start + $img_st_close) . $image . '[/img]';
2691                         $orig_body = substr($orig_body, $img_start + $img_st_close + $img_len + strlen('[/img]'));
2692                         if ($orig_body === false) {
2693                                 $orig_body = '';
2694                         }
2695
2696                         $img_start = strpos($orig_body, '[img');
2697                         $img_st_close = ($img_start !== false ? strpos(substr($orig_body, $img_start), ']') : false);
2698                         $img_len = ($img_start !== false ? strpos(substr($orig_body, $img_start + $img_st_close + 1), '[/img]') : false);
2699                 }
2700
2701                 $new_body = $new_body . $orig_body;
2702
2703                 return $new_body;
2704         }
2705
2706         private static function hasPermissions(array $obj)
2707         {
2708                 return !empty($obj['allow_cid']) || !empty($obj['allow_gid']) ||
2709                         !empty($obj['deny_cid']) || !empty($obj['deny_gid']);
2710         }
2711
2712         // @TODO $uid is unused parameter
2713         private static function samePermissions($uid, array $obj1, array $obj2): bool
2714         {
2715                 // first part is easy. Check that these are exactly the same.
2716                 if (($obj1['allow_cid'] == $obj2['allow_cid'])
2717                         && ($obj1['allow_gid'] == $obj2['allow_gid'])
2718                         && ($obj1['deny_cid'] == $obj2['deny_cid'])
2719                         && ($obj1['deny_gid'] == $obj2['deny_gid'])
2720                 ) {
2721                         return true;
2722                 }
2723
2724                 // This is harder. Parse all the permissions and compare the resulting set.
2725                 $recipients1 = self::enumeratePermissions($obj1);
2726                 $recipients2 = self::enumeratePermissions($obj2);
2727                 sort($recipients1);
2728                 sort($recipients2);
2729
2730                 /// @TODO Comparison of arrays, maybe use array_diff_assoc() here?
2731                 return ($recipients1 == $recipients2);
2732         }
2733
2734         /**
2735          * Returns an array of contact-ids that are allowed to see this object
2736          *
2737          * @param array $obj              Item array with at least uid, allow_cid, allow_gid, deny_cid and deny_gid
2738          * @param bool  $check_dead       Prunes unavailable contacts from the result
2739          * @param bool  $expand_followers Expand the list of followers
2740          * @return array
2741          * @throws \Exception
2742          */
2743         public static function enumeratePermissions(array $obj, bool $check_dead = false, bool $expand_followers = true): array
2744         {
2745                 $aclFormatter = DI::aclFormatter();
2746
2747                 if (!$expand_followers && (!empty($obj['deny_cid']) || !empty($obj['deny_gid']))) {
2748                         $expand_followers = true;
2749                 }
2750
2751                 $allow_people  = $aclFormatter->expand($obj['allow_cid']);
2752                 $allow_circles = Circle::expand($obj['uid'], $aclFormatter->expand($obj['allow_gid']), $check_dead, $expand_followers);
2753                 $deny_people   = $aclFormatter->expand($obj['deny_cid']);
2754                 $deny_circles  = Circle::expand($obj['uid'], $aclFormatter->expand($obj['deny_gid']), $check_dead);
2755                 $recipients    = array_unique(array_merge($allow_people, $allow_circles));
2756                 $deny          = array_unique(array_merge($deny_people, $deny_circles));
2757                 $recipients    = array_diff($recipients, $deny);
2758                 return $recipients;
2759         }
2760
2761         public static function expire(int $uid, int $days, string $network = "", bool $force = false)
2762         {
2763                 if (!$uid || ($days < 1)) {
2764                         return;
2765                 }
2766
2767                 $condition = [
2768                         "`uid` = ? AND NOT `deleted` AND `gravity` = ?",
2769                         $uid, self::GRAVITY_PARENT
2770                 ];
2771
2772                 /*
2773                  * $expire_network_only = save your own wall posts
2774                  * and just expire conversations started by others
2775                  */
2776                 $expire_network_only = DI::pConfig()->get($uid, 'expire', 'network_only', false);
2777
2778                 if ($expire_network_only) {
2779                         $condition[0] .= " AND NOT `wall`";
2780                 }
2781
2782                 if ($network != "") {
2783                         $condition[0] .= " AND `network` = ?";
2784                         $condition[] = $network;
2785                 }
2786
2787                 $condition[0] .= " AND `received` < ?";
2788                 $condition[] = DateTimeFormat::utc('now - ' . $days . ' day');
2789
2790                 $items = Post::select(['resource-id', 'starred', 'id', 'post-type', 'uid', 'uri-id'], $condition);
2791
2792                 if (!DBA::isResult($items)) {
2793                         return;
2794                 }
2795
2796                 $expire_items = (bool)DI::pConfig()->get($uid, 'expire', 'items', true);
2797
2798                 // Forcing expiring of items - but not notes and marked items
2799                 if ($force) {
2800                         $expire_items = true;
2801                 }
2802
2803                 $expire_notes = (bool)DI::pConfig()->get($uid, 'expire', 'notes', true);
2804                 $expire_starred = (bool)DI::pConfig()->get($uid, 'expire', 'starred', true);
2805                 $expire_photos = (bool)DI::pConfig()->get($uid, 'expire', 'photos', false);
2806
2807                 $expired = 0;
2808
2809                 $priority = DI::config()->get('system', 'expire-notify-priority');
2810
2811                 while ($item = Post::fetch($items)) {
2812                         // don't expire filed items
2813                         if (DBA::exists('post-category', ['uri-id' => $item['uri-id'], 'uid' => $item['uid'], 'type' => Post\Category::FILE])) {
2814                                 continue;
2815                         }
2816
2817                         // Only expire posts, not photos and photo comments
2818
2819                         if (!$expire_photos && !empty($item['resource-id'])) {
2820                                 continue;
2821                         } elseif (!$expire_starred && intval($item['starred'])) {
2822                                 continue;
2823                         } elseif (!$expire_notes && ($item['post-type'] == self::PT_PERSONAL_NOTE)) {
2824                                 continue;
2825                         } elseif (!$expire_items && ($item['post-type'] != self::PT_PERSONAL_NOTE)) {
2826                                 continue;
2827                         }
2828
2829                         self::markForDeletionById($item['id'], $priority);
2830
2831                         ++$expired;
2832                 }
2833                 DBA::close($items);
2834                 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]);
2835         }
2836
2837         public static function firstPostDate(int $uid, bool $wall = false)
2838         {
2839                 $user = User::getById($uid, ['register_date']);
2840                 if (empty($user)) {
2841                         return false;
2842                 }
2843
2844                 $condition = [
2845                         "`uid` = ? AND `wall` = ? AND NOT `deleted` AND `visible` AND `received` >= ?",
2846                         $uid, $wall, $user['register_date']
2847                 ];
2848                 $params = ['order' => ['received' => false]];
2849                 $thread = Post::selectFirstThread(['received'], $condition, $params);
2850                 if (DBA::isResult($thread)) {
2851                         $postdate = substr(DateTimeFormat::local($thread['received']), 0, 10);
2852                         return $postdate;
2853                 }
2854                 return false;
2855         }
2856
2857         /**
2858          * add/remove activity to an item
2859          *
2860          * Toggle activities as like,dislike,attend of an item
2861          *
2862          * @param int    $item_id
2863          * @param string $verb
2864          *            Activity verb. One of
2865          *            like, unlike, dislike, undislike, attendyes, unattendyes,
2866          *            attendno, unattendno, attendmaybe, unattendmaybe,
2867          *            announce, unannounce
2868          * @param int    $uid
2869          * @param string $allow_cid
2870          * @param string $allow_gid
2871          * @param string $deny_cid
2872          * @param string $deny_gid
2873          * @return bool
2874          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
2875          * @throws \ImagickException
2876          * @hook  'post_local_end'
2877          *            array $arr
2878          *            'post_id' => ID of posted item
2879          */
2880         public static function performActivity(int $item_id, string $verb, int $uid, string $allow_cid = null, string $allow_gid = null, string $deny_cid = null, string $deny_gid = null): bool
2881         {
2882                 if (empty($uid)) {
2883                         return false;
2884                 }
2885
2886                 Logger::notice('Start create activity', ['verb' => $verb, 'item' => $item_id, 'user' => $uid]);
2887
2888                 $item = Post::selectFirst(self::ITEM_FIELDLIST, ['id' => $item_id]);
2889                 if (!DBA::isResult($item)) {
2890                         Logger::warning('Post had not been fetched', ['id' => $item_id]);
2891                         return false;
2892                 }
2893
2894                 $uri_id = $item['uri-id'];
2895
2896                 if (!in_array($item['uid'], [0, $uid])) {
2897                         return false;
2898                 }
2899
2900                 if (!Post::exists(['uri-id' => $item['parent-uri-id'], 'uid' => $uid])) {
2901                         $stored = self::storeForUserByUriId($item['parent-uri-id'], $uid, ['post-reason' => Item::PR_ACTIVITY]);
2902                         if (($item['parent-uri-id'] == $item['uri-id']) && !empty($stored)) {
2903                                 $item = Post::selectFirst(self::ITEM_FIELDLIST, ['id' => $stored]);
2904                                 if (!DBA::isResult($item)) {
2905                                         Logger::info('Could not fetch just created item - should not happen', ['stored' => $stored, 'uid' => $uid, 'uri-id' => $uri_id]);
2906                                         return false;
2907                                 }
2908                         }
2909                 }
2910
2911                 // Retrieves the local post owner
2912                 $owner = User::getOwnerDataById($uid);
2913                 if (empty($owner)) {
2914                         Logger::info('Empty owner for user', ['uid' => $uid]);
2915                         return false;
2916                 }
2917
2918                 // Retrieve the current logged in user's public contact
2919                 $author_id = Contact::getPublicIdByUserId($uid);
2920                 if (empty($author_id)) {
2921                         Logger::info('Empty public contact');
2922                         return false;
2923                 }
2924
2925                 $activity = null;
2926                 switch ($verb) {
2927                         case 'like':
2928                         case 'unlike':
2929                                 $activity = Activity::LIKE;
2930                                 break;
2931                         case 'dislike':
2932                         case 'undislike':
2933                                 $activity = Activity::DISLIKE;
2934                                 break;
2935                         case 'attendyes':
2936                         case 'unattendyes':
2937                                 $activity = Activity::ATTEND;
2938                                 break;
2939                         case 'attendno':
2940                         case 'unattendno':
2941                                 $activity = Activity::ATTENDNO;
2942                                 break;
2943                         case 'attendmaybe':
2944                         case 'unattendmaybe':
2945                                 $activity = Activity::ATTENDMAYBE;
2946                                 break;
2947                         case 'follow':
2948                         case 'unfollow':
2949                                 $activity = Activity::FOLLOW;
2950                                 break;
2951                         case 'announce':
2952                         case 'unannounce':
2953                                 $activity = Activity::ANNOUNCE;
2954                                 break;
2955                         default:
2956                                 Logger::warning('unknown verb', ['verb' => $verb, 'item' => $item_id]);
2957                                 return false;
2958                 }
2959
2960                 $mode = Strings::startsWith($verb, 'un') ? 'delete' : 'create';
2961
2962                 // Enable activity toggling instead of on/off
2963                 $event_verb_flag = $activity === Activity::ATTEND || $activity === Activity::ATTENDNO || $activity === Activity::ATTENDMAYBE;
2964
2965                 // Look for an existing verb row
2966                 // Event participation activities are mutually exclusive, only one of them can exist at all times.
2967                 if ($event_verb_flag) {
2968                         $verbs = [Activity::ATTEND, Activity::ATTENDNO, Activity::ATTENDMAYBE];
2969
2970                         // Translate to the index based activity index
2971                         $vids = [];
2972                         foreach ($verbs as $verb) {
2973                                 $vids[] = Verb::getID($verb);
2974                         }
2975                 } else {
2976                         $vids = Verb::getID($activity);
2977                 }
2978
2979                 $condition = [
2980                         'vid' => $vids, 'deleted' => false, 'gravity' => self::GRAVITY_ACTIVITY,
2981                         'author-id' => $author_id, 'uid' => $uid, 'thr-parent-id' => $uri_id
2982                 ];
2983                 $like_item = Post::selectFirst(['id', 'guid', 'verb'], $condition);
2984
2985                 if (DBA::isResult($like_item)) {
2986                         /**
2987                          * Truth table for existing activities
2988                          *
2989                          * |          Inputs            ||      Outputs      |
2990                          * |----------------------------||-------------------|
2991                          * |  Mode  | Event | Same verb || Delete? | Return? |
2992                          * |--------|-------|-----------||---------|---------|
2993                          * | create |  Yes  |    Yes    ||   No    |   Yes   |
2994                          * | create |  Yes  |    No     ||   Yes   |   No    |
2995                          * | create |  No   |    Yes    ||   No    |   Yes   |
2996                          * | create |  No   |    No     ||        N/A†       |
2997                          * | delete |  Yes  |    Yes    ||   Yes   |   N/A‡  |
2998                          * | delete |  Yes  |    No     ||   No    |   N/A‡  |
2999                          * | delete |  No   |    Yes    ||   Yes   |   N/A‡  |
3000                          * | delete |  No   |    No     ||        N/A†       |
3001                          * |--------|-------|-----------||---------|---------|
3002                          * |   A    |   B   |     C     || A xor C | !B or C |
3003                          *
3004                          * † Can't happen: It's impossible to find an existing non-event activity without
3005                          *                 the same verb because we are only looking for this single verb.
3006                          *
3007                          * ‡ The "mode = delete" is returning early whether an existing activity was found or not.
3008                          */
3009                         if ($mode == 'create' xor $like_item['verb'] == $activity) {
3010                                 self::markForDeletionById($like_item['id']);
3011                         }
3012
3013                         if (!$event_verb_flag || $like_item['verb'] == $activity) {
3014                                 return true;
3015                         }
3016                 }
3017
3018                 // No need to go further if we aren't creating anything
3019                 if ($mode == 'delete') {
3020                         return true;
3021                 }
3022
3023                 $objtype = $item['resource-id'] ? Activity\ObjectType::IMAGE : Activity\ObjectType::NOTE;
3024
3025                 $new_item = [
3026                         'guid'          => System::createUUID(),
3027                         'uri'           => self::newURI(),
3028                         'uid'           => $uid,
3029                         'contact-id'    => $owner['id'],
3030                         'wall'          => $item['wall'],
3031                         'origin'        => 1,
3032                         'network'       => Protocol::DFRN,
3033                         'protocol'      => Conversation::PARCEL_DIRECT,
3034                         'direction'     => Conversation::PUSH,
3035                         'gravity'       => self::GRAVITY_ACTIVITY,
3036                         'parent'        => $item['id'],
3037                         'thr-parent'    => $item['uri'],
3038                         'owner-id'      => $author_id,
3039                         'author-id'     => $author_id,
3040                         'body'          => $activity,
3041                         'verb'          => $activity,
3042                         'object-type'   => $objtype,
3043                         'allow_cid'     => $allow_cid ?? $item['allow_cid'],
3044                         'allow_gid'     => $allow_gid ?? $item['allow_gid'],
3045                         'deny_cid'      => $deny_cid ?? $item['deny_cid'],
3046                         'deny_gid'      => $deny_gid ?? $item['deny_gid'],
3047                         'visible'       => 1,
3048                         'unseen'        => 1,
3049                 ];
3050
3051                 if (in_array($activity, [Activity::LIKE, Activity::DISLIKE])) {
3052                         $signed = Diaspora::createLikeSignature($uid, $new_item);
3053                         if (!empty($signed)) {
3054                                 $new_item['diaspora_signed_text'] = json_encode($signed);
3055                         }
3056                 }
3057
3058                 self::insert($new_item, true);
3059
3060                 // If the parent item isn't visible then set it to visible
3061                 // @todo Check if this is still needed
3062                 if (!$item['visible']) {
3063                         self::update(['visible' => true], ['id' => $item['id']]);
3064                 }
3065                 return true;
3066         }
3067
3068         /**
3069          * Fetch the SQL condition for the given user id
3070          *
3071          * @param integer $owner_id User ID for which the permissions should be fetched
3072          * @return array condition
3073          */
3074         public static function getPermissionsConditionArrayByUserId(int $owner_id): array
3075         {
3076                 $local_user = DI::userSession()->getLocalUserId();
3077                 $remote_user = DI::userSession()->getRemoteContactID($owner_id);
3078
3079                 // default permissions - anonymous user
3080                 $condition = ["`private` != ?", self::PRIVATE];
3081
3082                 if ($local_user && ($local_user == $owner_id)) {
3083                         // Profile owner - everything is visible
3084                         $condition = [];
3085                 } elseif ($remote_user) {
3086                         // Authenticated visitor - fetch the matching permissionsets
3087                         $permissionSets = DI::permissionSet()->selectByContactId($remote_user, $owner_id);
3088                         if (!empty($set)) {
3089                                 $condition = [
3090                                         "(`private` != ? OR (`private` = ? AND `wall`
3091                                         AND `psid` IN (" . implode(', ', array_fill(0, count($set), '?')) . ")))",
3092                                         self::PRIVATE, self::PRIVATE
3093                                 ];
3094                                 $condition = array_merge($condition, $permissionSets->column('id'));
3095                         }
3096                 }
3097
3098                 return $condition;
3099         }
3100
3101         /**
3102          * Get a permission SQL string for the given user
3103          *
3104          * @param int $owner_id
3105          * @param string $table
3106          * @return string
3107          */
3108         public static function getPermissionsSQLByUserId(int $owner_id, string $table = ''): string
3109         {
3110                 $local_user = DI::userSession()->getLocalUserId();
3111                 $remote_user = DI::userSession()->getRemoteContactID($owner_id);
3112
3113                 if (!empty($table)) {
3114                         $table = DBA::quoteIdentifier($table) . '.';
3115                 }
3116
3117                 /*
3118                  * Construct permissions
3119                  *
3120                  * default permissions - anonymous user
3121                  */
3122                 $sql = sprintf(" AND " . $table . "`private` != %d", self::PRIVATE);
3123
3124                 // Profile owner - everything is visible
3125                 if ($local_user && ($local_user == $owner_id)) {
3126                         $sql = '';
3127                 } elseif ($remote_user) {
3128                         /*
3129                          * Authenticated visitor. Unless pre-verified,
3130                          * check that the contact belongs to this $owner_id
3131                          * and load the circles the visitor belongs to.
3132                          * If pre-verified, the caller is expected to have already
3133                          * done this and passed the circles into this function.
3134                          */
3135                         $permissionSets = DI::permissionSet()->selectByContactId($remote_user, $owner_id);
3136
3137                         if (!empty($set)) {
3138                                 $sql_set = sprintf(" OR (" . $table . "`private` = %d AND " . $table . "`wall` AND " . $table . "`psid` IN (", self::PRIVATE) . implode(',', $permissionSets->column('id')) . "))";
3139                         } else {
3140                                 $sql_set = '';
3141                         }
3142
3143                         $sql = sprintf(" AND (" . $table . "`private` != %d", self::PRIVATE) . $sql_set . ")";
3144                 }
3145
3146                 return $sql;
3147         }
3148
3149         /**
3150          * get translated item type
3151          *
3152          * @param array                $item
3153          * @param \Friendica\Core\L10n $l10n
3154          * @return string
3155          */
3156         public static function postType(array $item, \Friendica\Core\L10n $l10n): string
3157         {
3158                 if (!empty($item['event-id'])) {
3159                         return $l10n->t('event');
3160                 } elseif (!empty($item['resource-id'])) {
3161                         return $l10n->t('photo');
3162                 } elseif ($item['gravity'] == self::GRAVITY_ACTIVITY) {
3163                         return $l10n->t('activity');
3164                 } elseif ($item['gravity'] == self::GRAVITY_COMMENT) {
3165                         return $l10n->t('comment');
3166                 }
3167
3168                 return $l10n->t('post');
3169         }
3170
3171         /**
3172          * Sets the "rendered-html" field of the provided item
3173          *
3174          * Body is preserved to avoid side-effects as we modify it just-in-time for spoilers and private image links
3175          *
3176          * @param array $item
3177          *
3178          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
3179          * @todo Remove reference, simply return "rendered-html" and "rendered-hash"
3180          */
3181         private static function putInCache(&$item)
3182         {
3183                 // Save original body to prevent addons to modify it
3184                 $body = $item['body'];
3185
3186                 $rendered_hash = $item['rendered-hash'] ?? '';
3187                 $rendered_html = $item['rendered-html'] ?? '';
3188
3189                 if (
3190                         $rendered_hash == ''
3191                         || $rendered_html == ''
3192                         || $rendered_hash != hash('md5', BBCode::VERSION . '::' . $body)
3193                         || DI::config()->get('system', 'ignore_cache')
3194                 ) {
3195                         $item['rendered-html'] = BBCode::convertForUriId($item['uri-id'], $item['body']);
3196                         $item['rendered-hash'] = hash('md5', BBCode::VERSION . '::' . $body);
3197
3198                         $hook_data = ['item' => $item, 'rendered-html' => $item['rendered-html'], 'rendered-hash' => $item['rendered-hash']];
3199                         Hook::callAll('put_item_in_cache', $hook_data);
3200                         $item['rendered-html'] = $hook_data['rendered-html'];
3201                         $item['rendered-hash'] = $hook_data['rendered-hash'];
3202                         unset($hook_data);
3203
3204                         // Update if the generated values differ from the existing ones
3205                         if ((($rendered_hash != $item['rendered-hash']) || ($rendered_html != $item['rendered-html'])) && !empty($item['id'])) {
3206                                 self::update(
3207                                         [
3208                                                 'rendered-html' => $item['rendered-html'],
3209                                                 'rendered-hash' => $item['rendered-hash']
3210                                         ],
3211                                         ['id' => $item['id']]
3212                                 );
3213                         }
3214                 }
3215
3216                 $item['body'] = $body;
3217         }
3218
3219         /**
3220          * Given an item array, convert the body element from bbcode to html and add smilie icons.
3221          * If attach is true, also add icons for item attachments.
3222          *
3223          * @param array   $item Record from item table
3224          * @param boolean $attach If true, add icons for item attachments as well
3225          * @param boolean $is_preview Whether this is a preview
3226          * @param boolean $only_cache Whether only cached HTML should be updated
3227          * @return string item body html
3228          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
3229          * @throws \ImagickException
3230          * @hook  prepare_body_init item array before any work
3231          * @hook  prepare_body_content_filter ('item'=>item array, 'filter_reasons'=>string array) before first bbcode to html
3232          * @hook  prepare_body ('item'=>item array, 'html'=>body string, 'is_preview'=>boolean, 'filter_reasons'=>string array) after first bbcode to html
3233          * @hook  prepare_body_final ('item'=>item array, 'html'=>body string) after attach icons and blockquote special case handling (spoiler, author)
3234          */
3235         public static function prepareBody(array &$item, bool $attach = false, bool $is_preview = false, bool $only_cache = false): string
3236         {
3237                 $a = DI::app();
3238                 Hook::callAll('prepare_body_init', $item);
3239
3240
3241                 // In order to provide theme developers more possibilities, event items
3242                 // are treated differently.
3243                 if ($item['object-type'] === Activity\ObjectType::EVENT && isset($item['event-id'])) {
3244                         $ev = Event::getItemHTML($item);
3245                         return $ev;
3246                 }
3247
3248                 $tags = Tag::populateFromItem($item);
3249
3250                 $item['tags'] = $tags['tags'];
3251                 $item['hashtags'] = $tags['hashtags'];
3252                 $item['mentions'] = $tags['mentions'];
3253
3254                 if (!$is_preview) {
3255                         $item['body'] = preg_replace("#\s*\[attachment .*?].*?\[/attachment]\s*#ism", "\n", $item['body']);
3256                         $item['body'] = Post\Media::removeFromEndOfBody($item['body'] ?? '');
3257                         $item['body'] = Post\Media::replaceImage($item['body']);
3258                 }
3259
3260                 $body = $item['body'];
3261                 if ($is_preview) {
3262                         $item['body'] = preg_replace("#\s*\[attachment .*?].*?\[/attachment]\s*#ism", "\n", $item['body']);
3263                 }
3264
3265                 $fields = ['uri-id', 'uri', 'body', 'title', 'author-name', 'author-link', 'author-avatar', 'guid', 'created', 'plink', 'network', 'has-media', 'quote-uri-id', 'post-type'];
3266
3267                 $shared_uri_id      = 0;
3268                 $shared_links       = [];
3269                 $quote_shared_links = [];
3270
3271                 $shared = DI::contentItem()->getSharedPost($item, $fields);
3272                 if (!empty($shared['post'])) {
3273                         $shared_item  = $shared['post'];
3274                         $shared_item['body'] = Post\Media::removeFromEndOfBody($shared_item['body']);
3275                         $shared_item['body'] = Post\Media::replaceImage($shared_item['body']);
3276                         $quote_uri_id = $shared['post']['uri-id'];
3277                         $shared_links[] = strtolower($shared['post']['uri']);
3278                         $item['body'] = BBCode::removeSharedData($item['body']);
3279                 } elseif (empty($shared_item['uri-id']) && empty($item['quote-uri-id']) && ($item['network'] != Protocol::DIASPORA)) {
3280                         $media = Post\Media::getByURIId($item['uri-id'], [Post\Media::ACTIVITY]);
3281                         if (!empty($media) && ($media[0]['media-uri-id'] != $item['uri-id'])) {
3282                                 $shared_item = Post::selectFirst($fields, ['uri-id' => $media[0]['media-uri-id'], 'uid' => [$item['uid'], 0]]);
3283                                 if (empty($shared_item['uri-id'])) {
3284                                         $shared_item = Post::selectFirst($fields, ['plink' => $media[0]['url'], 'uid' => [$item['uid'], 0]]);
3285                                 } elseif (!in_array(strtolower($media[0]['url']), $shared_links)) {
3286                                         $shared_links[] = strtolower($media[0]['url']);
3287                                 }
3288
3289                                 if (empty($shared_item['uri-id'])) {
3290                                         $shared_item = Post::selectFirst($fields, ['uri' => $media[0]['url'], 'uid' => [$item['uid'], 0]]);
3291                                         $shared_links[] = strtolower($media[0]['url']);
3292                                 }
3293
3294                                 if (!empty($shared_item['uri-id'])) {
3295                                         $data = BBCode::getAttachmentData($shared_item['body']);
3296                                         if (!empty($data['url'])) {
3297                                                 $quote_shared_links[] = $data['url'];
3298                                         }
3299
3300                                         $quote_uri_id = $shared_item['uri-id'];
3301                                 }
3302                         }
3303                 }
3304
3305                 if (!empty($quote_uri_id)) {
3306                         if (isset($shared_item['plink'])) {
3307                                 $item['body'] .= "\n" . DI::contentItem()->createSharedBlockByArray($shared_item, false, true);
3308                         } else {
3309                                 DI::logger()->warning('Missing plink in shared item', ['item' => $item, 'shared' => $shared, 'quote_uri_id' => $quote_uri_id, 'shared_item' => $shared_item]);
3310                         }
3311                 }
3312
3313                 if (!empty($shared_item['uri-id'])) {
3314                         $shared_uri_id = $shared_item['uri-id'];
3315                         $shared_links[] = strtolower($shared_item['plink']);
3316                         $sharedSplitAttachments = DI::postMediaRepository()->splitAttachments($shared_uri_id, [], $shared_item['has-media']);
3317                         $shared_links = array_merge($shared_links, $sharedSplitAttachments['visual']->column('url'));
3318                         $shared_links = array_merge($shared_links, $sharedSplitAttachments['link']->column('url'));
3319                         $shared_links = array_merge($shared_links, $sharedSplitAttachments['additional']->column('url'));
3320                         $item['body'] = self::replaceVisualAttachments($sharedSplitAttachments['visual'], $item['body']);
3321                 }
3322
3323                 $itemSplitAttachments = DI::postMediaRepository()->splitAttachments($item['uri-id'], $shared_links, $item['has-media'] ?? false);
3324                 $item['body'] = self::replaceVisualAttachments($itemSplitAttachments['visual'], $item['body'] ?? '');
3325
3326                 self::putInCache($item);
3327                 $item['body'] = $body;
3328                 $s = $item["rendered-html"];
3329
3330                 if ($only_cache) {
3331                         return '';
3332                 }
3333
3334                 // Compile eventual content filter reasons
3335                 $filter_reasons = [];
3336                 if (!$is_preview && DI::userSession()->getPublicContactId() != $item['author-id']) {
3337                         if (!empty($item['user-blocked-author']) || !empty($item['user-blocked-owner'])) {
3338                                 $filter_reasons[] = DI::l10n()->t('%s is blocked', $item['author-name']);
3339                         } elseif (!empty($item['user-ignored-author']) || !empty($item['user-ignored-owner'])) {
3340                                 $filter_reasons[] = DI::l10n()->t('%s is ignored', $item['author-name']);
3341                         } elseif (!empty($item['user-collapsed-author']) || !empty($item['user-collapsed-owner'])) {
3342                                 $filter_reasons[] = DI::l10n()->t('Content from %s is collapsed', $item['author-name']);
3343                         }
3344
3345                         if (!empty($item['content-warning']) && (!DI::userSession()->getLocalUserId() || !DI::pConfig()->get(DI::userSession()->getLocalUserId(), 'system', 'disable_cw', false))) {
3346                                 $filter_reasons[] = DI::l10n()->t('Content warning: %s', $item['content-warning']);
3347                         }
3348
3349                         $item['attachments'] = $itemSplitAttachments;
3350
3351                         $hook_data = [
3352                                 'item' => $item,
3353                                 'filter_reasons' => $filter_reasons
3354                         ];
3355                         Hook::callAll('prepare_body_content_filter', $hook_data);
3356                         $filter_reasons = $hook_data['filter_reasons'];
3357                         unset($hook_data);
3358                 }
3359
3360                 $hook_data = [
3361                         'item' => $item,
3362                         'html' => $s,
3363                         'preview' => $is_preview,
3364                         'filter_reasons' => $filter_reasons
3365                 ];
3366                 Hook::callAll('prepare_body', $hook_data);
3367                 $s = $hook_data['html'];
3368
3369                 unset($hook_data);
3370
3371                 if (!$attach) {
3372                         // Replace the blockquotes with quotes that are used in mails.
3373                         $mailquote = '<blockquote type="cite" class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">';
3374                         $s = str_replace(['<blockquote>', '<blockquote class="spoiler">', '<blockquote class="author">'], [$mailquote, $mailquote, $mailquote], $s);
3375                         return $s;
3376                 }
3377
3378                 if (!empty($sharedSplitAttachments)) {
3379                         $s = self::addGallery($s, $sharedSplitAttachments['visual']);
3380                         $s = self::addVisualAttachments($sharedSplitAttachments['visual'], $shared_item, $s, true);
3381                         $s = self::addLinkAttachment($shared_uri_id ?: $item['uri-id'], $sharedSplitAttachments, $body, $s, true, $quote_shared_links);
3382                         $s = self::addNonVisualAttachments($sharedSplitAttachments['additional'], $item, $s, true);
3383                         $body = BBCode::removeSharedData($body);
3384                 }
3385
3386                 $pos = strpos($s, BBCode::SHARED_ANCHOR);
3387                 if ($pos) {
3388                         $shared_html = substr($s, $pos + strlen(BBCode::SHARED_ANCHOR));
3389                         $s = substr($s, 0, $pos);
3390                 }
3391
3392                 $s = self::addGallery($s, $itemSplitAttachments['visual']);
3393                 $s = self::addVisualAttachments($itemSplitAttachments['visual'], $item, $s, false);
3394                 $s = self::addLinkAttachment($item['uri-id'], $itemSplitAttachments, $body, $s, false, $shared_links);
3395                 $s = self::addNonVisualAttachments($itemSplitAttachments['additional'], $item, $s, false);
3396                 $s = self::addQuestions($item, $s);
3397
3398                 // Map.
3399                 if (strpos($s, '<div class="map">') !== false && !empty($item['coord'])) {
3400                         $x = Map::byCoordinates(trim($item['coord']));
3401                         if ($x) {
3402                                 $s = preg_replace('/\<div class\=\"map\"\>/', '$0' . $x, $s);
3403                         }
3404                 }
3405
3406                 // Replace friendica image url size with theme preference.
3407                 if (!empty($a->getThemeInfoValue('item_image_size'))) {
3408                         $ps = $a->getThemeInfoValue('item_image_size');
3409                         $s = preg_replace('|(<img[^>]+src="[^"]+/photo/[0-9a-f]+)-[0-9]|', "$1-" . $ps, $s);
3410                 }
3411
3412                 if (!empty($shared_html)) {
3413                         $s .= $shared_html;
3414                 }
3415
3416                 $s = HTML::applyContentFilter($s, $filter_reasons);
3417
3418                 $hook_data = ['item' => $item, 'html' => $s];
3419                 Hook::callAll('prepare_body_final', $hook_data);
3420                 return $hook_data['html'];
3421         }
3422
3423         /**
3424          * Modify links to pictures to links for the "Fancybox" gallery
3425          *
3426          * @param string     $s
3427          * @param PostMedias $PostMedias
3428          * @return string
3429          */
3430         private static function addGallery(string $s, PostMedias $PostMedias): string
3431         {
3432                 foreach ($PostMedias as $PostMedia) {
3433                         if (!$PostMedia->preview || ($PostMedia->type !== Post\Media::IMAGE)) {
3434                                 continue;
3435                         }
3436
3437                         if ($PostMedia->hasDimensions()) {
3438                                 $pattern = '#<a href="' . preg_quote($PostMedia->url) . '">(.*?)"></a>#';
3439
3440                                 $s = preg_replace_callback($pattern, function () use ($PostMedia) {
3441                                         return Renderer::replaceMacros(Renderer::getMarkupTemplate('content/image/single_with_height_allocation.tpl'), [
3442                                                 '$image' => $PostMedia,
3443                                                 '$allocated_height' => $PostMedia->getAllocatedHeight(),
3444                                                 '$allocated_max_width' => ($PostMedia->previewWidth ?? $PostMedia->width) . 'px',
3445                                         ]);
3446                                 }, $s);
3447                         } else {
3448                                 $s = str_replace('<a href="' . $PostMedia->url . '"', '<a data-fancybox="uri-id-' . $PostMedia->uriId . '" href="' . $PostMedia->url . '"', $s);
3449                         }
3450                 }
3451
3452                 return $s;
3453         }
3454
3455         /**
3456          * Check if the body contains a link
3457          *
3458          * @param string $body
3459          * @param string $url
3460          * @param int    $type
3461          * @return bool
3462          */
3463         public static function containsLink(string $body, string $url, int $type = 0): bool
3464         {
3465                 // Make sure that for example site parameters aren't used when testing if the link is contained in the body
3466                 $urlparts = parse_url($url);
3467                 if (empty($urlparts)) {
3468                         return false;
3469                 }
3470
3471                 unset($urlparts['query']);
3472                 unset($urlparts['fragment']);
3473
3474                 try {
3475                         $url = (string)Uri::fromParts((array)$urlparts);
3476                 } catch (\InvalidArgumentException $e) {
3477                         DI::logger()->notice('Invalid URL', ['$url' => $url, '$urlparts' => $urlparts]);
3478                         /* See https://github.com/friendica/friendica/issues/12113
3479                          * Malformed URLs will result in a Fatal Error
3480                          */
3481                         return false;
3482                 }
3483
3484                 // Remove media links to only search in embedded content
3485                 // @todo Check images for image link, audio for audio links, ...
3486                 if (in_array($type, [Post\Media::AUDIO, Post\Media::VIDEO, Post\Media::IMAGE])) {
3487                         $body = preg_replace("/\[url=[^\[\]]*\](.*)\[\/url\]/Usi", ' $1 ', $body);
3488                 }
3489
3490                 if (strpos($body, $url)) {
3491                         return true;
3492                 }
3493
3494                 foreach ([0, 1, 2] as $size) {
3495                         if (
3496                                 preg_match('#/photo/.*-' . $size . '\.#ism', $url) &&
3497                                 strpos(preg_replace('#(/photo/.*)-[012]\.#ism', '$1-' . $size . '.', $body), $url)
3498                         ) {
3499                                 return true;
3500                         }
3501                 }
3502
3503                 return false;
3504         }
3505
3506         /**
3507          * Replace visual attachments in the body
3508          *
3509          * @param PostMedias $PostMedias
3510          * @param string     $body
3511          * @return string modified body
3512          */
3513         private static function replaceVisualAttachments(PostMedias $PostMedias, string $body): string
3514         {
3515                 DI::profiler()->startRecording('rendering');
3516
3517                 foreach ($PostMedias as $PostMedia) {
3518                         if ($PostMedia->preview) {
3519                                 if (DI::baseUrl()->isLocalUri($PostMedia->preview)) {
3520                                         continue;
3521                                 }
3522                                 $proxy   = DI::baseUrl() . $PostMedia->getPreviewPath(Proxy::SIZE_LARGE);
3523                                 $search  = ['[img=' . $PostMedia->preview . ']', ']' . $PostMedia->preview . '[/img]'];
3524                                 $replace = ['[img=' . $proxy . ']', ']' . $proxy . '[/img]'];
3525
3526                                 $body = str_replace($search, $replace, $body);
3527                         } elseif ($PostMedia->mimetype->type == 'image') {
3528                                 if (DI::baseUrl()->isLocalUri($PostMedia->url)) {
3529                                         continue;
3530                                 }
3531                                 $proxy   = DI::baseUrl() . $PostMedia->getPreviewPath(Proxy::SIZE_LARGE);
3532                                 $search  = ['[img=' . $PostMedia->url . ']', ']' . $PostMedia->url . '[/img]'];
3533                                 $replace = ['[img=' . $proxy . ']', ']' . $proxy . '[/img]'];
3534
3535                                 $body = str_replace($search, $replace, $body);
3536                         }
3537                 }
3538                 DI::profiler()->stopRecording();
3539                 return $body;
3540         }
3541
3542         /**
3543          * Add visual attachments to the content
3544          *
3545          * @param PostMedias $PostMedias
3546          * @param array      $item
3547          * @param string     $content
3548          * @param bool       $shared
3549          * @return string modified content
3550          * @throws ServiceUnavailableException
3551          */
3552         private static function addVisualAttachments(PostMedias $PostMedias, array $item, string $content, bool $shared): string
3553         {
3554                 DI::profiler()->startRecording('rendering');
3555                 $leading  = '';
3556                 $trailing = '';
3557                 $images   = new PostMedias();
3558
3559                 // @todo In the future we should make a single for the template engine with all media in it. This allows more flexibilty.
3560                 foreach ($PostMedias as $PostMedia) {
3561                         if (self::containsLink($item['body'], $PostMedia->preview ?? $PostMedia->url, $PostMedia->type)) {
3562                                 continue;
3563                         }
3564
3565                         if ($PostMedia->mimetype->type == 'image' || $PostMedia->preview) {
3566                                 $preview_size = Proxy::SIZE_MEDIUM;
3567                                 $preview_url = DI::baseUrl() . $PostMedia->getPreviewPath($preview_size);
3568                         } else {
3569                                 $preview_size = 0;
3570                                 $preview_url = '';
3571                         }
3572
3573                         if ($preview_url && self::containsLink($item['body'], $preview_url)) {
3574                                 continue;
3575                         }
3576
3577                         if ($PostMedia->mimetype->type == 'video') {
3578                                 /// @todo Move the template to /content as well
3579                                 $media = Renderer::replaceMacros(Renderer::getMarkupTemplate('video_top.tpl'), [
3580                                         '$video' => [
3581                                                 'id'      => $PostMedia->id,
3582                                                 'src'     => (string)$PostMedia->url,
3583                                                 'name'    => $PostMedia->name ?: $PostMedia->url,
3584                                                 'preview' => $preview_url,
3585                                                 'mime'    => (string)$PostMedia->mimetype,
3586                                         ],
3587                                 ]);
3588                                 if (($item['post-type'] ?? null) == Item::PT_VIDEO) {
3589                                         $leading .= $media;
3590                                 } else {
3591                                         $trailing .= $media;
3592                                 }
3593                         } elseif ($PostMedia->mimetype->type == 'audio') {
3594                                 $media = Renderer::replaceMacros(Renderer::getMarkupTemplate('content/audio.tpl'), [
3595                                         '$audio' => [
3596                                                 'id'     => $PostMedia->id,
3597                                                 'src'    => (string)$PostMedia->url,
3598                                                 'name'   => $PostMedia->name ?: $PostMedia->url,
3599                                                 'mime'   => (string)$PostMedia->mimetype,
3600                                         ],
3601                                 ]);
3602                                 if (($item['post-type'] ?? null) == Item::PT_AUDIO) {
3603                                         $leading .= $media;
3604                                 } else {
3605                                         $trailing .= $media;
3606                                 }
3607                         } elseif ($PostMedia->mimetype->type == 'image') {
3608                                 $src_url = DI::baseUrl() . $PostMedia->getPhotoPath();
3609                                 if (self::containsLink($item['body'], $src_url)) {
3610                                         continue;
3611                                 }
3612
3613                                 $images[] = $PostMedia->withUrl(new Uri($src_url))->withPreview(new Uri($preview_url), $preview_size);
3614                         }
3615                 }
3616
3617                 $media = Image::getBodyAttachHtml($images);
3618
3619                 // On Diaspora posts the attached pictures are leading
3620                 if ($item['network'] == Protocol::DIASPORA) {
3621                         $leading .= $media;
3622                 } else {
3623                         $trailing .= $media;
3624                 }
3625
3626                 if ($shared) {
3627                         $content = str_replace(BBCode::TOP_ANCHOR, '<div class="body-attach">' . $leading . '</div>' . BBCode::TOP_ANCHOR, $content);
3628                         $content = str_replace(BBCode::BOTTOM_ANCHOR, '<div class="body-attach">' . $trailing . '</div>' . BBCode::BOTTOM_ANCHOR, $content);
3629                 } else {
3630                         if ($leading != '') {
3631                                 $content = '<div class="body-attach">' . $leading . '</div>' . $content;
3632                         }
3633
3634                         if ($trailing != '') {
3635                                 $content .= '<div class="body-attach">' . $trailing . '</div>';
3636                         }
3637                 }
3638
3639                 DI::profiler()->stopRecording();
3640                 return $content;
3641         }
3642
3643         /**
3644          * Add link attachment to the content
3645          *
3646          * @param int          $uriid
3647          * @param PostMedias[] $attachments
3648          * @param string       $body
3649          * @param string       $content
3650          * @param bool         $shared
3651          * @param array        $ignore_links A list of URLs to ignore
3652          * @return string modified content
3653          * @throws InternalServerErrorException
3654          * @throws ServiceUnavailableException
3655          */
3656         private static function addLinkAttachment(int $uriid, array $attachments, string $body, string $content, bool $shared, array $ignore_links): string
3657         {
3658                 DI::profiler()->startRecording('rendering');
3659                 // Don't show a preview when there is a visual attachment (audio or video)
3660                 $types = $attachments['visual']->column('type');
3661                 $preview = !in_array(PostMedia::TYPE_IMAGE, $types) && !in_array(PostMedia::TYPE_VIDEO, $types);
3662
3663                 /** @var ?PostMedia $attachment */
3664                 $attachment = null;
3665                 foreach ($attachments['link'] as $PostMedia) {
3666                         $found = false;
3667                         foreach ($ignore_links as $ignore_link) {
3668                                 if (Strings::compareLink($PostMedia->url, $ignore_link)) {
3669                                         $found = true;
3670                                 }
3671                         }
3672                         // @todo Judge between the links to use the one with most information
3673                         if (!$found && (empty($attachment) || $PostMedia->authorName ||
3674                                 (!$attachment->name && $PostMedia->name) ||
3675                                 (!$attachment->description && $PostMedia->description) ||
3676                                 (!$attachment->preview && $PostMedia->preview))) {
3677                                 $attachment = $PostMedia;
3678                         }
3679                 }
3680
3681                 if (!empty($attachment)) {
3682                         $data = [
3683                                 'after' => '',
3684                                 'author_name' => $attachment->authorName ?? '',
3685                                 'author_url' => (string)($attachment->authorUrl ?? ''),
3686                                 'description' => $attachment->description ?? '',
3687                                 'image' => '',
3688                                 'preview' => '',
3689                                 'provider_name' => $attachment->publisherName ?? '',
3690                                 'provider_url' => (string)($attachment->publisherUrl ?? ''),
3691                                 'text' => '',
3692                                 'title' => $attachment->name ?? '',
3693                                 'type' => 'link',
3694                                 'url' => (string)$attachment->url,
3695                         ];
3696
3697                         if ($preview && $attachment->preview) {
3698                                 if ($attachment->previewWidth >= 500) {
3699                                         $data['image'] = DI::baseUrl() . $attachment->getPreviewPath(Proxy::SIZE_MEDIUM);
3700                                 } else {
3701                                         $data['preview'] = DI::baseUrl() . $attachment->getPreviewPath(Proxy::SIZE_MEDIUM);
3702                                 }
3703                         }
3704
3705                         if (!empty($data['description']) && !empty($content)) {
3706                                 similar_text($data['description'], $content, $percent);
3707                         } else {
3708                                 $percent = 0;
3709                         }
3710
3711                         if (!empty($data['description']) && (($data['title'] == $data['description']) || ($percent > 95) || (strpos($content, $data['description']) !== false))) {
3712                                 $data['description'] = '';
3713                         }
3714
3715                         if (($data['author_name'] ?? '') == ($data['provider_name'] ?? '')) {
3716                                 $data['author_name'] = '';
3717                         }
3718
3719                         if (($data['author_url'] ?? '') == ($data['provider_url'] ?? '')) {
3720                                 $data['author_url'] = '';
3721                         }
3722                 } elseif (preg_match("/.*(\[attachment.*?\].*?\[\/attachment\]).*/ism", $body, $match)) {
3723                         $data = BBCode::getAttachmentData($match[1]);
3724                 }
3725                 DI::profiler()->stopRecording();
3726
3727                 if (isset($data['url']) && !in_array(strtolower($data['url']), $ignore_links)) {
3728                         if (!empty($data['description']) || !empty($data['image']) || !empty($data['preview']) || (!empty($data['title']) && !Strings::compareLink($data['title'], $data['url']))) {
3729                                 $parts = parse_url($data['url']);
3730                                 if (!empty($parts['scheme']) && !empty($parts['host'])) {
3731                                         if (empty($data['provider_name'])) {
3732                                                 $data['provider_name'] = $parts['host'];
3733                                         }
3734                                         if (empty($data['provider_url']) || empty(parse_url($data['provider_url'], PHP_URL_SCHEME))) {
3735                                                 $data['provider_url'] = $parts['scheme'] . '://' . $parts['host'];
3736
3737                                                 if (!empty($parts['port'])) {
3738                                                         $data['provider_url'] .= ':' . $parts['port'];
3739                                                 }
3740                                         }
3741                                 }
3742
3743                                 // @todo Use a template
3744                                 $preview_mode = DI::pConfig()->get(DI::userSession()->getLocalUserId(), 'system', 'preview_mode', BBCode::PREVIEW_LARGE);
3745                                 if ($preview_mode != BBCode::PREVIEW_NONE) {
3746                                         $rendered = BBCode::convertAttachment('', BBCode::INTERNAL, false, $data, $uriid, $preview_mode);
3747                                 } else {
3748                                         $rendered = '';
3749                                 }
3750                         } elseif (!self::containsLink($content, $data['url'], Post\Media::HTML)) {
3751                                 $rendered = Renderer::replaceMacros(Renderer::getMarkupTemplate('content/link.tpl'), [
3752                                         '$url'   => $data['url'],
3753                                         '$title' => $data['title'],
3754                                 ]);
3755                         } else {
3756                                 return $content;
3757                         }
3758
3759                         if ($shared) {
3760                                 return str_replace(BBCode::BOTTOM_ANCHOR, BBCode::BOTTOM_ANCHOR . $rendered, $content);
3761                         } else {
3762                                 return $content . $rendered;
3763                         }
3764                 }
3765                 return $content;
3766         }
3767
3768         /**
3769          * Add non-visual attachments to the content
3770          *
3771          * @param PostMedias $PostMedias
3772          * @param array      $item
3773          * @param string     $content
3774          * @return string modified content
3775          * @throws InternalServerErrorException
3776          * @throws \ImagickException
3777          */
3778         private static function addNonVisualAttachments(PostMedias $PostMedias, array $item, string $content): string
3779         {
3780                 DI::profiler()->startRecording('rendering');
3781                 $trailing = '';
3782                 foreach ($PostMedias as $PostMedia) {
3783                         if (strpos($item['body'], (string)$PostMedia->url)) {
3784                                 continue;
3785                         }
3786
3787                         $author = [
3788                                 'uid'     => 0,
3789                                 'id'      => $item['author-id'],
3790                                 'network' => $item['author-network'],
3791                                 'url'     => $item['author-link'],
3792                                 'alias'   => $item['author-alias']
3793                         ];
3794                         $the_url = Contact::magicLinkByContact($author, $PostMedia->url);
3795
3796                         $title = Strings::escapeHtml(trim($PostMedia->description ?? '' ?: $PostMedia->url));
3797
3798                         if ($PostMedia->size) {
3799                                 $title .= ' ' . $PostMedia->size . ' ' . DI::l10n()->t('bytes');
3800                         }
3801
3802                         /// @todo Use a template
3803                         $icon = '<div class="attachtype icon s22 type-' . $PostMedia->mimetype->type . ' subtype-' . $PostMedia->mimetype->subtype . '"></div>';
3804                         $trailing .= '<a href="' . strip_tags($the_url) . '" title="' . $title . '" class="attachlink" target="_blank" rel="noopener noreferrer" >' . $icon . '</a>';
3805                 }
3806
3807                 if ($trailing != '') {
3808                         $content .= '<div class="body-attach">' . $trailing . '</div>';
3809                 }
3810
3811                 DI::profiler()->stopRecording();
3812                 return $content;
3813         }
3814
3815         private static function addQuestions(array $item, string $content): string
3816         {
3817                 DI::profiler()->startRecording('rendering');
3818                 if (!empty($item['question-id'])) {
3819                         $question = [
3820                                 'id'       => $item['question-id'],
3821                                 'multiple' => $item['question-multiple'],
3822                                 'voters'   => $item['question-voters'],
3823                                 'endtime'  => $item['question-end-time']
3824                         ];
3825
3826                         $options = Post\QuestionOption::getByURIId($item['uri-id']);
3827                         foreach ($options as $key => $option) {
3828                                 if ($question['voters'] > 0) {
3829                                         $percent = $option['replies'] / $question['voters'] * 100;
3830                                         $options[$key]['vote'] = DI::l10n()->tt('%2$s (%3$d%%, %1$d vote)', '%2$s (%3$d%%, %1$d votes)', $option['replies'] ?? 0, $option['name'], round($percent, 1));
3831                                 } else {
3832                                         $options[$key]['vote'] = DI::l10n()->tt('%2$s (%1$d vote)', '%2$s (%1$d votes)', $option['replies'] ?? 0, $option['name']);
3833                                 }
3834                         }
3835
3836                         if (!empty($question['voters']) && !empty($question['endtime'])) {
3837                                 $summary = DI::l10n()->tt('%d voter. Poll end: %s', '%d voters. Poll end: %s', $question['voters'] ?? 0, Temporal::getRelativeDate($question['endtime']));
3838                         } elseif (!empty($question['voters'])) {
3839                                 $summary = DI::l10n()->tt('%d voter.', '%d voters.', $question['voters'] ?? 0);
3840                         } elseif (!empty($question['endtime'])) {
3841                                 $summary = DI::l10n()->t('Poll end: %s', Temporal::getRelativeDate($question['endtime']));
3842                         } else {
3843                                 $summary = '';
3844                         }
3845
3846                         $content .= Renderer::replaceMacros(Renderer::getMarkupTemplate('content/question.tpl'), [
3847                                 '$question' => $question,
3848                                 '$options'  => $options,
3849                                 '$summary'  => $summary,
3850                         ]);
3851                 }
3852                 DI::profiler()->stopRecording();
3853                 return $content;
3854         }
3855
3856         /**
3857          * get private link for item
3858          *
3859          * @param array $item
3860          * @return boolean|array False if item has not plink, otherwise array('href'=>plink url, 'title'=>translated title)
3861          * @throws \Exception
3862          */
3863         public static function getPlink(array $item)
3864         {
3865                 if (!empty($item['plink']) && Network::isValidHttpUrl($item['plink'])) {
3866                         $plink = $item['plink'];
3867                 } elseif (!empty($item['uri']) && Network::isValidHttpUrl($item['uri']) && !Network::isLocalLink($item['uri'])) {
3868                         $plink = $item['uri'];
3869                 }
3870
3871                 if (DI::userSession()->getLocalUserId()) {
3872                         $ret = [
3873                                 'href' => "display/" . $item['guid'],
3874                                 'orig' => "display/" . $item['guid'],
3875                                 'title' => DI::l10n()->t('View on separate page'),
3876                                 'orig_title' => DI::l10n()->t('View on separate page'),
3877                         ];
3878
3879                         if (!empty($plink) && ($item['private'] == self::PRIVATE)) {
3880                                 $author = [
3881                                         'uid'     => 0,
3882                                         'id'      => $item['author-id'],
3883                                         'network' => $item['author-network'],
3884                                         'url'     => $item['author-link'],
3885                                         'alias'   => $item['author-alias'],
3886                                 ];
3887                                 $plink = Contact::magicLinkByContact($author, $plink);
3888                         }
3889
3890                         if (!empty($plink)) {
3891                                 $ret['href'] = DI::baseUrl()->remove($plink);
3892                                 $ret['title'] = DI::l10n()->t('Link to source');
3893                         }
3894                 } elseif (!empty($plink) && ($item['private'] != self::PRIVATE)) {
3895                         $ret = [
3896                                 'href' => $plink,
3897                                 'orig' => $plink,
3898                                 'title' => DI::l10n()->t('Link to source'),
3899                                 'orig_title' => DI::l10n()->t('Link to source'),
3900                         ];
3901                 } else {
3902                         $ret = [];
3903                 }
3904
3905                 return $ret;
3906         }
3907
3908         /**
3909          * Does the given uri-id belongs to a post that is sent as starting post to a group?
3910          * This does apply to posts that are sent via ! and not in parallel to a group via @
3911          *
3912          * @param int $uri_id
3913          *
3914          * @return boolean "true" when it is a group post
3915          */
3916         public static function isGroupPost(int $uri_id): bool
3917         {
3918                 if (Post::exists(['private' => Item::PUBLIC, 'uri-id' => $uri_id])) {
3919                         return false;
3920                 }
3921
3922                 foreach (Tag::getByURIId($uri_id, [Tag::EXCLUSIVE_MENTION, Tag::AUDIENCE]) as $tag) {
3923                         // @todo Possibly check for a public audience in the future, see https://socialhub.activitypub.rocks/t/fep-1b12-group-federation/2724
3924                         // and https://codeberg.org/fediverse/fep/src/branch/main/feps/fep-1b12.md
3925                         if (DBA::exists('contact', ['uid' => 0, 'nurl' => Strings::normaliseLink($tag['url']), 'contact-type' => Contact::TYPE_COMMUNITY])) {
3926                                 return true;
3927                         }
3928                 }
3929                 return false;
3930         }
3931
3932         /**
3933          * Search item id for given URI or plink
3934          *
3935          * @param string $uri
3936          * @param integer $uid
3937          *
3938          * @return integer item id
3939          */
3940         public static function searchByLink(string $uri, int $uid = 0): int
3941         {
3942                 $ssl_uri = str_replace('http://', 'https://', $uri);
3943                 $uris = [$uri, $ssl_uri, Strings::normaliseLink($uri)];
3944
3945                 $item = Post::selectFirst(['id'], ['uri' => $uris, 'uid' => $uid]);
3946                 if (DBA::isResult($item)) {
3947                         return $item['id'];
3948                 }
3949
3950                 $item = Post::selectFirst(['id'], ['plink' => $uris, 'uid' => $uid]);
3951                 if (DBA::isResult($item)) {
3952                         return $item['id'];
3953                 }
3954
3955                 return 0;
3956         }
3957
3958         /**
3959          * Return the URI for a link to the post
3960          *
3961          * @param string $uri URI or link to post
3962          *
3963          * @return string URI
3964          */
3965         public static function getURIByLink(string $uri): string
3966         {
3967                 $ssl_uri = str_replace('http://', 'https://', $uri);
3968                 $uris = [$uri, $ssl_uri, Strings::normaliseLink($uri)];
3969
3970                 $item = Post::selectFirst(['uri'], ['uri' => $uris]);
3971                 if (DBA::isResult($item)) {
3972                         return $item['uri'];
3973                 }
3974
3975                 $item = Post::selectFirst(['uri'], ['plink' => $uris]);
3976                 if (DBA::isResult($item)) {
3977                         return $item['uri'];
3978                 }
3979
3980                 return '';
3981         }
3982
3983         /**
3984          * Fetches item for given URI or plink
3985          *
3986          * @param string $uri
3987          * @param int    $uid
3988          * @param int    $completion
3989          *
3990          * @return integer item id
3991          */
3992         public static function fetchByLink(string $uri, int $uid = 0, int $completion = ActivityPub\Receiver::COMPLETION_MANUAL): int
3993         {
3994                 Logger::info('Trying to fetch link', ['uid' => $uid, 'uri' => $uri]);
3995                 $item_id = self::searchByLink($uri, $uid);
3996                 if (!empty($item_id)) {
3997                         Logger::info('Link found', ['uid' => $uid, 'uri' => $uri, 'id' => $item_id]);
3998                         return $item_id;
3999                 }
4000
4001                 $hookData = [
4002                         'uri'     => $uri,
4003                         'uid'     => $uid,
4004                         'item_id' => null,
4005                 ];
4006
4007                 Hook::callAll('item_by_link', $hookData);
4008
4009                 if (isset($hookData['item_id'])) {
4010                         return is_numeric($hookData['item_id']) ? $hookData['item_id'] : 0;
4011                 }
4012
4013                 $fetched_uri = ActivityPub\Processor::fetchMissingActivity($uri, [], '', $completion, $uid);
4014
4015                 if ($fetched_uri) {
4016                         $item_id = self::searchByLink($fetched_uri, $uid);
4017                 } else {
4018                         $item_id = Diaspora::fetchByURL($uri);
4019                 }
4020
4021                 if (!empty($item_id)) {
4022                         Logger::info('Link fetched', ['uid' => $uid, 'uri' => $uri, 'id' => $item_id]);
4023                         return $item_id;
4024                 }
4025
4026                 Logger::info('Link not found', ['uid' => $uid, 'uri' => $uri]);
4027                 return 0;
4028         }
4029
4030         /**
4031          * Fetch the uri-id of a quote
4032          *
4033          * @param string $body
4034          * @return integer
4035          */
4036         public static function getQuoteUriId(string $body, int $uid = 0): int
4037         {
4038                 $shared = BBCode::fetchShareAttributes($body);
4039                 if (empty($shared['guid']) && empty($shared['message_id'])) {
4040                         return 0;
4041                 }
4042
4043                 if (empty($shared['link']) && empty($shared['message_id'])) {
4044                         Logger::notice('Invalid share block.', ['share' => $shared]);
4045                         return 0;
4046                 }
4047
4048                 if (!empty($shared['guid'])) {
4049                         $shared_item = Post::selectFirst(['uri-id'], ['guid' => $shared['guid'], 'uid' => [0, $uid]]);
4050                         if (!empty($shared_item['uri-id'])) {
4051                                 Logger::debug('Found post by guid', ['guid' => $shared['guid'], 'uid' => $uid]);
4052                                 return $shared_item['uri-id'];
4053                         }
4054                 }
4055
4056                 if (!empty($shared['message_id'])) {
4057                         $shared_item = Post::selectFirst(['uri-id'], ['uri' => $shared['message_id'], 'uid' => [0, $uid]]);
4058                         if (!empty($shared_item['uri-id'])) {
4059                                 Logger::debug('Found post by message_id', ['message_id' => $shared['message_id'], 'uid' => $uid]);
4060                                 return $shared_item['uri-id'];
4061                         }
4062                 }
4063
4064                 if (!empty($shared['link'])) {
4065                         $shared_item = Post::selectFirst(['uri-id'], ['plink' => $shared['link'], 'uid' => [0, $uid]]);
4066                         if (!empty($shared_item['uri-id'])) {
4067                                 Logger::debug('Found post by link', ['link' => $shared['link'], 'uid' => $uid]);
4068                                 return $shared_item['uri-id'];
4069                         }
4070                 }
4071
4072                 $url = $shared['message_id'] ?: $shared['link'];
4073                 $id = self::fetchByLink($url, 0, ActivityPub\Receiver::COMPLETION_ASYNC);
4074                 if (!$id) {
4075                         Logger::notice('Post could not be fetched.', ['url' => $url, 'uid' => $uid]);
4076                         return 0;
4077                 }
4078
4079                 $shared_item = Post::selectFirst(['uri-id'], ['id' => $id]);
4080                 if (!empty($shared_item['uri-id'])) {
4081                         Logger::debug('Fetched shared post', ['id' => $id, 'url' => $url, 'uid' => $uid]);
4082                         return $shared_item['uri-id'];
4083                 }
4084
4085                 Logger::warning('Post does not exist although it was supposed to had been fetched.', ['id' => $id, 'url' => $url, 'uid' => $uid]);
4086                 return 0;
4087         }
4088 }