src/Model/Item.php

   1 <?php
   2 /**
   3  * @copyright Copyright (C) 2010-2022, 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\Content\Text\BBCode;
  25 use Friendica\Content\Text\HTML;
  26 use Friendica\Core\Hook;
  27 use Friendica\Core\Logger;
  28 use Friendica\Core\Protocol;
  29 use Friendica\Core\Renderer;
  30 use Friendica\Core\Session;
  31 use Friendica\Core\System;
  32 use Friendica\Model\Tag;
  33 use Friendica\Core\Worker;
  34 use Friendica\Database\DBA;
  35 use Friendica\DI;
  36 use Friendica\Protocol\Activity;
  37 use Friendica\Protocol\ActivityPub;
  38 use Friendica\Protocol\Diaspora;
  39 use Friendica\Util\DateTimeFormat;
  40 use Friendica\Util\Map;
  41 use Friendica\Util\Network;
  42 use Friendica\Util\Proxy;
  43 use Friendica\Util\Strings;
  44 use Friendica\Util\Temporal;
  45 use Friendica\Worker\Delivery;
  46 use GuzzleHttp\Psr7\Uri;
  47 use LanguageDetection\Language;
  48
  49 class Item
  50 {
  51         // Posting types, inspired by https://www.w3.org/TR/activitystreams-vocabulary/#object-types
  52         const PT_ARTICLE = 0;
  53         const PT_NOTE = 1;
  54         const PT_PAGE = 2;
  55         const PT_IMAGE = 16;
  56         const PT_AUDIO = 17;
  57         const PT_VIDEO = 18;
  58         const PT_DOCUMENT = 19;
  59         const PT_EVENT = 32;
  60         const PT_POLL = 33;
  61         const PT_PERSONAL_NOTE = 128;
  62
  63         // Posting reasons (Why had a post been stored for a user?)
  64         const PR_NONE = 0;
  65         const PR_TAG = 64;
  66         const PR_TO = 65;
  67         const PR_CC = 66;
  68         const PR_BTO = 67;
  69         const PR_BCC = 68;
  70         const PR_FOLLOWER = 69;
  71         const PR_ANNOUNCEMENT = 70;
  72         const PR_COMMENT = 71;
  73         const PR_STORED = 72;
  74         const PR_GLOBAL = 73;
  75         const PR_RELAY = 74;
  76         const PR_FETCHED = 75;
  77         const PR_COMPLETION = 76;
  78         const PR_DIRECT = 77;
  79         const PR_ACTIVITY = 78;
  80         const PR_DISTRIBUTE = 79;
  81         const PR_PUSHED = 80;
  82         const PR_LOCAL = 81;
  83
  84         // system.accept_only_sharer setting values
  85         const COMPLETION_NONE    = 1;
  86         const COMPLETION_COMMENT = 0;
  87         const COMPLETION_LIKE    = 2;
  88
  89         // Field list that is used to display the items
  90         const DISPLAY_FIELDLIST = [
  91                 'uid', 'id', 'parent', 'guid', 'network', 'gravity',
  92                 'uri-id', 'uri', 'thr-parent-id', 'thr-parent', 'parent-uri-id', 'parent-uri', 'conversation',
  93                 'commented', 'created', 'edited', 'received', 'verb', 'object-type', 'postopts', 'plink',
  94                 'wall', 'private', 'starred', 'origin', 'parent-origin', 'title', 'body', 'language',
  95                 'content-warning', 'location', 'coord', 'app', 'rendered-hash', 'rendered-html', 'object',
  96                 'quote-uri', 'quote-uri-id', 'allow_cid', 'allow_gid', 'deny_cid', 'deny_gid', 'mention', 'global',
  97                 'author-id', 'author-link', 'author-name', 'author-avatar', 'author-network', 'author-updated', 'author-gsid', 'author-addr', 'author-uri-id',
  98                 'owner-id', 'owner-link', 'owner-name', 'owner-avatar', 'owner-network', 'owner-contact-type', 'owner-updated',
  99                 'causer-id', 'causer-link', 'causer-name', 'causer-avatar', 'causer-contact-type', 'causer-network',
 100                 'contact-id', 'contact-uid', 'contact-link', 'contact-name', 'contact-avatar',
 101                 'writable', 'self', 'cid', 'alias',
 102                 'event-created', 'event-edited', 'event-start', 'event-finish',
 103                 'event-summary', 'event-desc', 'event-location', 'event-type',
 104                 'event-nofinish', 'event-ignore', 'event-id',
 105                 'question-id', 'question-multiple', 'question-voters', 'question-end-time',
 106                 'has-categories', 'has-media',
 107                 'delivery_queue_count', 'delivery_queue_done', 'delivery_queue_failed'
 108         ];
 109
 110         // Field list that is used to deliver items via the protocols
 111         const DELIVER_FIELDLIST = ['uid', 'id', 'parent', 'uri-id', 'uri', 'thr-parent', 'parent-uri', 'guid',
 112                         'parent-guid', 'conversation', 'received', 'created', 'edited', 'verb', 'object-type', 'object', 'target',
 113                         'private', 'title', 'body', 'raw-body', 'location', 'coord', 'app',
 114                         'inform', 'deleted', 'extid', 'post-type', 'post-reason', 'gravity',
 115                         'allow_cid', 'allow_gid', 'deny_cid', 'deny_gid',
 116                         'author-id', 'author-link', 'author-name', 'author-avatar', 'owner-id', 'owner-link', 'contact-uid',
 117                         'signed_text', 'network', 'wall', 'contact-id', 'plink', 'origin',
 118                         'thr-parent-id', 'parent-uri-id', 'quote-uri', 'quote-uri-id', 'postopts', 'pubmail',
 119                         'event-created', 'event-edited', 'event-start', 'event-finish',
 120                         'event-summary', 'event-desc', 'event-location', 'event-type',
 121                         'event-nofinish', 'event-ignore', 'event-id'];
 122
 123         // All fields in the item table
 124         const ITEM_FIELDLIST = ['id', 'uid', 'parent', 'uri', 'parent-uri', 'thr-parent',
 125                         'guid', 'uri-id', 'parent-uri-id', 'thr-parent-id', 'conversation', 'vid',
 126                         'quote-uri', 'quote-uri-id', 'contact-id', 'wall', 'gravity', 'extid', 'psid',
 127                         'created', 'edited', 'commented', 'received', 'changed', 'verb',
 128                         'postopts', 'plink', 'resource-id', 'event-id', 'inform',
 129                         'allow_cid', 'allow_gid', 'deny_cid', 'deny_gid', 'post-type', 'post-reason',
 130                         'private', 'pubmail', 'visible', 'starred',
 131                         'unseen', 'deleted', 'origin', 'mention', 'global', 'network',
 132                         'title', 'content-warning', 'body', 'location', 'coord', 'app',
 133                         'rendered-hash', 'rendered-html', 'object-type', 'object', 'target-type', 'target',
 134                         'author-id', 'author-link', 'author-name', 'author-avatar', 'author-network',
 135                         'owner-id', 'owner-link', 'owner-name', 'owner-avatar', 'causer-id'];
 136
 137         // List of all verbs that don't need additional content data.
 138         // Never reorder or remove entries from this list. Just add new ones at the end, if needed.
 139         const ACTIVITIES = [
 140                 Activity::LIKE, Activity::DISLIKE,
 141                 Activity::ATTEND, Activity::ATTENDNO, Activity::ATTENDMAYBE,
 142                 Activity::FOLLOW,
 143                 Activity::ANNOUNCE];
 144
 145         const PUBLIC = 0;
 146         const PRIVATE = 1;
 147         const UNLISTED = 2;
 148
 149         // Item weight for query ordering
 150         const GRAVITY_PARENT   = 0;
 151         const GRAVITY_ACTIVITY = 3;
 152         const GRAVITY_COMMENT  = 6;
 153         const GRAVITY_UNKNOWN  = 9;
 154
 155         /**
 156          * Update existing item entries
 157          *
 158          * @param array $fields    The fields that are to be changed
 159          * @param array $condition The condition for finding the item entries
 160          *
 161          * In the future we may have to change permissions as well.
 162          * Then we had to add the user id as third parameter.
 163          *
 164          * A return value of "0" doesn't mean an error - but that 0 rows had been changed.
 165          *
 166          * @return integer|boolean number of affected rows - or "false" if there was an error
 167          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 168          */
 169         public static function update(array $fields, array $condition)
 170         {
 171                 if (empty($condition) || empty($fields)) {
 172                         return false;
 173                 }
 174
 175                 if (isset($fields['extid'])) {
 176                         $fields['external-id'] = ItemURI::getIdByURI($fields['extid']);
 177                 }
 178
 179                 if (!empty($fields['verb'])) {
 180                         $fields['vid'] = Verb::getID($fields['verb']);
 181                 }
 182
 183                 if (!empty($fields['edited'])) {
 184                         $previous = Post::selectFirst(['edited'], $condition);
 185                 }
 186
 187                 $rows = Post::update($fields, $condition);
 188                 if (is_bool($rows)) {
 189                         return $rows;
 190                 }
 191
 192                 // We only need to call the line by line update for specific fields
 193                 if (empty($fields['body']) && empty($fields['file']) &&
 194                         empty($fields['attach']) && empty($fields['edited'])) {
 195                         return $rows;
 196                 }
 197
 198                 Logger::info('Updating per single row method', ['fields' => $fields, 'condition' => $condition]);
 199
 200                 $items = Post::select(['id', 'origin', 'uri-id', 'uid', 'author-network'], $condition);
 201
 202                 $notify_items = [];
 203
 204                 while ($item = DBA::fetch($items)) {
 205                         if (!empty($fields['body'])) {
 206                                 Post\Media::insertFromAttachmentData($item['uri-id'], $fields['body']);
 207
 208                                 $content_fields = ['raw-body' => trim($fields['raw-body'] ?? $fields['body'])];
 209
 210                                 // Remove all media attachments from the body and store them in the post-media table
 211                                 // @todo On shared postings (Diaspora style and commented reshare) don't fetch content from the shared part
 212                                 $content_fields['raw-body'] = Post\Media::insertFromBody($item['uri-id'], $content_fields['raw-body']);
 213                                 $content_fields['raw-body'] = self::setHashtags($content_fields['raw-body']);
 214
 215                                 if ($item['author-network'] != Protocol::DFRN) {
 216                                         Post\Media::insertFromRelevantUrl($item['uri-id'], $content_fields['raw-body']);
 217                                 }
 218
 219                                 Post\Content::update($item['uri-id'], $content_fields);
 220                         }
 221
 222                         if (!empty($fields['file'])) {
 223                                 Post\Category::storeTextByURIId($item['uri-id'], $item['uid'], $fields['file']);
 224                         }
 225
 226                         if (!empty($fields['attach'])) {
 227                                 Post\Media::insertFromAttachment($item['uri-id'], $fields['attach']);
 228                         }
 229
 230                         // We only need to notfiy others when it is an original entry from us.
 231                         // Only call the notifier when the item had been edited and records had been changed.
 232                         if ($item['origin'] && !empty($fields['edited']) && ($previous['edited'] != $fields['edited'])) {
 233                                 $notify_items[] = $item['id'];
 234                         }
 235                 }
 236
 237                 DBA::close($items);
 238
 239                 foreach ($notify_items as $notify_item) {
 240                         $post = Post::selectFirst(['uri-id', 'uid'], ['id' => $notify_item]);
 241                         Worker::add(Worker::PRIORITY_HIGH, 'Notifier', Delivery::POST, (int)$post['uri-id'], (int)$post['uid']);
 242                 }
 243
 244                 return $rows;
 245         }
 246
 247         /**
 248          * Delete an item and notify others about it - if it was ours
 249          *
 250          * @param array   $condition The condition for finding the item entries
 251          * @param integer $priority  Priority for the notification
 252          * @return void
 253          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 254          */
 255         public static function markForDeletion(array $condition, int $priority = Worker::PRIORITY_HIGH)
 256         {
 257                 $items = Post::select(['id'], $condition);
 258                 while ($item = Post::fetch($items)) {
 259                         self::markForDeletionById($item['id'], $priority);
 260                 }
 261                 DBA::close($items);
 262         }
 263
 264         /**
 265          * Delete an item for an user and notify others about it - if it was ours
 266          *
 267          * @param array   $condition The condition for finding the item entries
 268          * @param integer $uid       User who wants to delete this item
 269          * @return void
 270          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 271          */
 272         public static function deleteForUser(array $condition, int $uid)
 273         {
 274                 if ($uid == 0) {
 275                         return;
 276                 }
 277
 278                 $items = Post::select(['id', 'uid', 'uri-id'], $condition);
 279                 while ($item = Post::fetch($items)) {
 280                         if (in_array($item['uid'], [$uid, 0])) {
 281                                 Post\User::update($item['uri-id'], $uid, ['hidden' => true], true);
 282                                 Post\ThreadUser::update($item['uri-id'], $uid, ['hidden' => true], true);
 283                         }
 284
 285                         if ($item['uid'] == $uid) {
 286                                 self::markForDeletionById($item['id'], Worker::PRIORITY_HIGH);
 287                         } elseif ($item['uid'] != 0) {
 288                                 Logger::warning('Wrong ownership. Not deleting item', ['id' => $item['id']]);
 289                         }
 290                 }
 291                 DBA::close($items);
 292         }
 293
 294         /**
 295          * Mark an item for deletion, delete related data and notify others about it - if it was ours
 296          *
 297          * @param integer $item_id
 298          * @param integer $priority Priority for the notification
 299          * @return boolean success
 300          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 301          */
 302         public static function markForDeletionById(int $item_id, int $priority = Worker::PRIORITY_HIGH): bool
 303         {
 304                 Logger::info('Mark item for deletion by id', ['id' => $item_id, 'callstack' => System::callstack()]);
 305                 // locate item to be deleted
 306                 $fields = ['id', 'uri', 'uri-id', 'uid', 'parent', 'parent-uri-id', 'origin',
 307                         'deleted', 'resource-id', 'event-id',
 308                         'verb', 'object-type', 'object', 'target', 'contact-id', 'psid', 'gravity'];
 309                 $item = Post::selectFirst($fields, ['id' => $item_id]);
 310                 if (!DBA::isResult($item)) {
 311                         Logger::info('Item not found.', ['id' => $item_id]);
 312                         return false;
 313                 }
 314
 315                 if ($item['deleted']) {
 316                         Logger::info('Item has already been marked for deletion.', ['id' => $item_id]);
 317                         return false;
 318                 }
 319
 320                 $parent = Post::selectFirst(['origin'], ['id' => $item['parent']]);
 321                 if (!DBA::isResult($parent)) {
 322                         $parent = ['origin' => false];
 323                 }
 324
 325                 // clean up categories and tags so they don't end up as orphans
 326                 Post\Category::deleteByURIId($item['uri-id'], $item['uid']);
 327
 328                 /*
 329                  * If item is a link to a photo resource, nuke all the associated photos
 330                  * (visitors will not have photo resources)
 331                  * This only applies to photos uploaded from the photos page. Photos inserted into a post do not
 332                  * generate a resource-id and therefore aren't intimately linked to the item.
 333                  */
 334                 /// @TODO: this should first check if photo is used elsewhere
 335                 if (strlen($item['resource-id'])) {
 336                         Photo::delete(['resource-id' => $item['resource-id'], 'uid' => $item['uid']]);
 337                 }
 338
 339                 // If item is a link to an event, delete the event.
 340                 if (intval($item['event-id'])) {
 341                         Event::delete($item['event-id']);
 342                 }
 343
 344                 // If item has attachments, drop them
 345                 $attachments = Post\Media::getByURIId($item['uri-id'], [Post\Media::DOCUMENT]);
 346                 foreach($attachments as $attachment) {
 347                         if (preg_match('|attach/(\d+)|', $attachment['url'], $matches)) {
 348                                 Attach::delete(['id' => $matches[1], 'uid' => $item['uid']]);
 349                         }
 350                 }
 351
 352                 // Set the item to "deleted"
 353                 $item_fields = ['deleted' => true, 'edited' => DateTimeFormat::utcNow(), 'changed' => DateTimeFormat::utcNow()];
 354                 Post::update($item_fields, ['id' => $item['id']]);
 355
 356                 Post\Category::storeTextByURIId($item['uri-id'], $item['uid'], '');
 357
 358                 if (!Post::exists(["`uri-id` = ? AND `uid` != 0 AND NOT `deleted`", $item['uri-id']])) {
 359                         self::markForDeletion(['uri-id' => $item['uri-id'], 'uid' => 0, 'deleted' => false], $priority);
 360                 }
 361
 362                 Post\DeliveryData::delete($item['uri-id']);
 363
 364                 // If it's the parent of a comment thread, kill all the kids
 365                 if ($item['gravity'] == self::GRAVITY_PARENT) {
 366                         self::markForDeletion(['parent' => $item['parent'], 'deleted' => false], $priority);
 367                 }
 368
 369                 // Is it our comment and/or our thread?
 370                 if (($item['origin'] || $parent['origin']) && ($item['uid'] != 0)) {
 371                         // When we delete the original post we will delete all existing copies on the server as well
 372                         self::markForDeletion(['uri-id' => $item['uri-id'], 'deleted' => false], $priority);
 373
 374                         // send the notification upstream/downstream
 375                         if ($priority) {
 376                                 Worker::add(['priority' => $priority, 'dont_fork' => true], 'Notifier', Delivery::DELETION, (int)$item['uri-id'], (int)$item['uid']);
 377                         }
 378                 } elseif ($item['uid'] != 0) {
 379                         Post\User::update($item['uri-id'], $item['uid'], ['hidden' => true]);
 380                         Post\ThreadUser::update($item['uri-id'], $item['uid'], ['hidden' => true]);
 381                 }
 382
 383                 Logger::info('Item has been marked for deletion.', ['id' => $item_id]);
 384
 385                 return true;
 386         }
 387
 388         /**
 389          * Get guid from given item record
 390          *
 391          * @param array $item Item record
 392          * @param bool Whether to notify (?)
 393          * @return string Guid
 394          */
 395         public static function guid(array $item, bool $notify): string
 396         {
 397                 if (!empty($item['guid'])) {
 398                         return trim($item['guid']);
 399                 }
 400
 401                 if ($notify) {
 402                         // We have to avoid duplicates. So we create the GUID in form of a hash of the plink or uri.
 403                         // We add the hash of our own host because our host is the original creator of the post.
 404                         $prefix_host = DI::baseUrl()->getHostname();
 405                 } else {
 406                         $prefix_host = '';
 407
 408                         // We are only storing the post so we create a GUID from the original hostname.
 409                         if (!empty($item['author-link'])) {
 410                                 $parsed = parse_url($item['author-link']);
 411                                 if (!empty($parsed['host'])) {
 412                                         $prefix_host = $parsed['host'];
 413                                 }
 414                         }
 415
 416                         if (empty($prefix_host) && !empty($item['plink'])) {
 417                                 $parsed = parse_url($item['plink']);
 418                                 if (!empty($parsed['host'])) {
 419                                         $prefix_host = $parsed['host'];
 420                                 }
 421                         }
 422
 423                         if (empty($prefix_host) && !empty($item['uri'])) {
 424                                 $parsed = parse_url($item['uri']);
 425                                 if (!empty($parsed['host'])) {
 426                                         $prefix_host = $parsed['host'];
 427                                 }
 428                         }
 429
 430                         // Is it in the format data@host.tld? - Used for mail contacts
 431                         if (empty($prefix_host) && !empty($item['author-link']) && strstr($item['author-link'], '@')) {
 432                                 $mailparts = explode('@', $item['author-link']);
 433                                 $prefix_host = array_pop($mailparts);
 434                         }
 435                 }
 436
 437                 if (!empty($item['plink'])) {
 438                         $guid = self::guidFromUri($item['plink'], $prefix_host);
 439                 } elseif (!empty($item['uri'])) {
 440                         $guid = self::guidFromUri($item['uri'], $prefix_host);
 441                 } else {
 442                         $guid = System::createUUID(hash('crc32', $prefix_host));
 443                 }
 444
 445                 return $guid;
 446         }
 447
 448         /**
 449          * Returns contact id from given item record
 450          *
 451          * @param array $item Item record
 452          * @return int Contact id
 453          */
 454         private static function contactId(array $item): int
 455         {
 456                 if ($item['uid'] == 0) {
 457                         return $item['author-id'];
 458                 }
 459
 460                 if ($item['origin']) {
 461                         $owner = User::getOwnerDataById($item['uid']);
 462                         return $owner['id'];
 463                 }
 464
 465                 if (!empty($item['causer-id']) && Contact::isSharing($item['causer-id'], $item['uid'], true)) {
 466                         $cdata = Contact::getPublicAndUserContactID($item['causer-id'], $item['uid']);
 467                         if (!empty($cdata['user'])) {
 468                                 return $cdata['user'];
 469                         }
 470                 }
 471
 472                 if ($item['gravity'] == self::GRAVITY_PARENT) {
 473                         if (Contact::isSharingByURL($item['owner-link'], $item['uid'], true)) {
 474                                 $contact_id = Contact::getIdForURL($item['owner-link'], $item['uid']);
 475                         } else {
 476                                 $contact_id = Contact::getIdForURL($item['owner-link']);
 477                         }
 478                         if (!empty($contact_id)) {
 479                                 return $contact_id;
 480                         }
 481                 }
 482
 483                 if (Contact::isSharingByURL($item['author-link'], $item['uid'], true)) {
 484                         $contact_id = Contact::getIdForURL($item['author-link'], $item['uid']);
 485                 } else {
 486                         $contact_id = Contact::getIdForURL($item['author-link']);
 487                 }
 488
 489                 if (!empty($contact_id)) {
 490                         return $contact_id;
 491                 }
 492
 493                 Logger::warning('contact-id could not be fetched, using self contact instead.', ['uid' => $item['uid'], 'item' => $item]);
 494                 $self = Contact::selectFirst(['id'], ['self' => true, 'uid' => $item['uid']]);
 495                 return $self['id'];
 496         }
 497
 498         /**
 499          * Write an item array into a spool file to be inserted later.
 500          * This command is called whenever there are issues storing an item.
 501          *
 502          * @param array $item The item fields that are to be inserted
 503          * @throws \Exception
 504          */
 505         private static function spool(array $item)
 506         {
 507                 // Now we store the data in the spool directory
 508                 // We use "microtime" to keep the arrival order and "mt_rand" to avoid duplicates
 509                 $file = 'item-' . round(microtime(true) * 10000) . '-' . mt_rand() . '.msg';
 510
 511                 $spoolpath = System::getSpoolPath();
 512                 if ($spoolpath != '') {
 513                         $spool = $spoolpath . '/' . $file;
 514
 515                         file_put_contents($spool, json_encode($item));
 516                         Logger::warning("Item wasn't stored - Item was spooled into file", ['file' => $file]);
 517                 }
 518         }
 519
 520         /**
 521          * Check if the item array is a duplicate
 522          *
 523          * @param array $item Item record
 524          * @return boolean is it a duplicate?
 525          */
 526         private static function isDuplicate(array $item): bool
 527         {
 528                 // Checking if there is already an item with the same guid
 529                 $condition = ['guid' => $item['guid'], 'network' => $item['network'], 'uid' => $item['uid']];
 530                 if (Post::exists($condition)) {
 531                         Logger::notice('Found already existing item', $condition);
 532                         return true;
 533                 }
 534
 535                 $condition = ['uri-id' => $item['uri-id'], 'uid' => $item['uid'],
 536                         'network' => [$item['network'], Protocol::DFRN]];
 537                 if (Post::exists($condition)) {
 538                         Logger::notice('duplicated item with the same uri found.', $condition);
 539                         return true;
 540                 }
 541
 542                 // On Friendica and Diaspora the GUID is unique
 543                 if (in_array($item['network'], [Protocol::DFRN, Protocol::DIASPORA])) {
 544                         $condition = ['guid' => $item['guid'], 'uid' => $item['uid']];
 545                         if (Post::exists($condition)) {
 546                                 Logger::notice('duplicated item with the same guid found.', $condition);
 547                                 return true;
 548                         }
 549                 } elseif ($item['network'] == Protocol::OSTATUS) {
 550                         // Check for an existing post with the same content. There seems to be a problem with OStatus.
 551                         $condition = ["`body` = ? AND `network` = ? AND `created` = ? AND `contact-id` = ? AND `uid` = ?",
 552                                         $item['body'], $item['network'], $item['created'], $item['contact-id'], $item['uid']];
 553                         if (Post::exists($condition)) {
 554                                 Logger::notice('duplicated item with the same body found.', $item);
 555                                 return true;
 556                         }
 557                 }
 558
 559                 /*
 560                  * Check for already added items.
 561                  * There is a timing issue here that sometimes creates double postings.
 562                  * An unique index would help - but the limitations of MySQL (maximum size of index values) prevent this.
 563                  */
 564                 if (($item['uid'] == 0) && Post::exists(['uri-id' => $item['uri-id'], 'uid' => 0])) {
 565                         Logger::notice('Global item already stored.', ['uri-id' => $item['uri-id'], 'network' => $item['network']]);
 566                         return true;
 567                 }
 568
 569                 return false;
 570         }
 571
 572         /**
 573          * Check if the item array is valid
 574          *
 575          * @param array $item Item record
 576          * @return boolean item is valid
 577          */
 578         public static function isValid(array $item): bool
 579         {
 580                 // When there is no content then we don't post it
 581                 if (($item['body'] . $item['title'] == '') && (empty($item['uri-id']) || !Post\Media::existsByURIId($item['uri-id']))) {
 582                         Logger::notice('No body, no title.');
 583                         return false;
 584                 }
 585
 586                 if (!empty($item['uid'])) {
 587                         $owner = User::getOwnerDataById($item['uid'], false);
 588                         if (!$owner) {
 589                                 Logger::warning('Missing item user owner data', ['uid' => $item['uid']]);
 590                                 return false;
 591                         }
 592
 593                         if ($owner['account_expired'] || $owner['account_removed']) {
 594                                 Logger::notice('Item user has been deleted/expired/removed', ['uid' => $item['uid'], 'deleted' => $owner['deleted'], 'account_expired' => $owner['account_expired'], 'account_removed' => $owner['account_removed']]);
 595                                 return false;
 596                         }
 597                 }
 598
 599                 if (!empty($item['author-id']) && Contact::isBlocked($item['author-id'])) {
 600                         Logger::notice('Author is blocked node-wide', ['author-link' => $item['author-link'], 'item-uri' => $item['uri']]);
 601                         return false;
 602                 }
 603
 604                 if (!empty($item['author-link']) && Network::isUrlBlocked($item['author-link'])) {
 605                         Logger::notice('Author server is blocked', ['author-link' => $item['author-link'], 'item-uri' => $item['uri']]);
 606                         return false;
 607                 }
 608
 609                 if (!empty($item['owner-id']) && Contact::isBlocked($item['owner-id'])) {
 610                         Logger::notice('Owner is blocked node-wide', ['owner-link' => $item['owner-link'], 'item-uri' => $item['uri']]);
 611                         return false;
 612                 }
 613
 614                 if (!empty($item['owner-link']) && Network::isUrlBlocked($item['owner-link'])) {
 615                         Logger::notice('Owner server is blocked', ['owner-link' => $item['owner-link'], 'item-uri' => $item['uri']]);
 616                         return false;
 617                 }
 618
 619                 if (!empty($item['uid']) && !self::isAllowedByUser($item, $item['uid'])) {
 620                         return false;
 621                 }
 622
 623                 if ($item['verb'] == Activity::FOLLOW) {
 624                         if (!$item['origin'] && ($item['author-id'] == Contact::getPublicIdByUserId($item['uid']))) {
 625                                 // Our own follow request can be relayed to us. We don't store it to avoid notification chaos.
 626                                 Logger::info("Follow: Don't store not origin follow request", ['parent-uri' => $item['parent-uri']]);
 627                                 return false;
 628                         }
 629
 630                         $condition = ['verb' => Activity::FOLLOW, 'uid' => $item['uid'],
 631                                 'parent-uri' => $item['parent-uri'], 'author-id' => $item['author-id']];
 632                         if (Post::exists($condition)) {
 633                                 // It happens that we receive multiple follow requests by the same author - we only store one.
 634                                 Logger::info('Follow: Found existing follow request from author', ['author-id' => $item['author-id'], 'parent-uri' => $item['parent-uri']]);
 635                                 return false;
 636                         }
 637                 }
 638
 639                 return true;
 640         }
 641
 642         /**
 643          * Check if the item array is too old
 644          *
 645          * @param array $item Item record
 646          * @return boolean item is too old
 647          */
 648         public static function isTooOld(array $item): bool
 649         {
 650                 // check for create date and expire time
 651                 $expire_interval = DI::config()->get('system', 'dbclean-expire-days', 0);
 652
 653                 $user = DBA::selectFirst('user', ['expire'], ['uid' => $item['uid']]);
 654                 if (DBA::isResult($user) && ($user['expire'] > 0) && (($user['expire'] < $expire_interval) || ($expire_interval == 0))) {
 655                         $expire_interval = $user['expire'];
 656                 }
 657
 658                 if (($expire_interval > 0) && !empty($item['created'])) {
 659                         $expire_date = time() - ($expire_interval * 86400);
 660                         $created_date = strtotime($item['created']);
 661                         if ($created_date < $expire_date) {
 662                                 Logger::notice('Item created before expiration interval.', [
 663                                         'created' => date('c', $created_date),
 664                                         'expired' => date('c', $expire_date),
 665                                         '$item' => $item
 666                                 ]);
 667                                 return true;
 668                         }
 669                 }
 670
 671                 return false;
 672         }
 673
 674         /**
 675          * Return the id of the given item array if it has been stored before
 676          *
 677          * @param array $item Item record
 678          * @return integer Item id or zero on error
 679          */
 680         private static function getDuplicateID(array $item): int
 681         {
 682                 if (empty($item['network']) || in_array($item['network'], Protocol::FEDERATED)) {
 683                         $condition = ['`uri-id` = ? AND `uid` = ? AND `network` IN (?, ?, ?, ?)',
 684                                 $item['uri-id'],
 685                                 $item['uid'],
 686                                 Protocol::ACTIVITYPUB,
 687                                 Protocol::DIASPORA,
 688                                 Protocol::DFRN,
 689                                 Protocol::OSTATUS
 690                         ];
 691                         $existing = Post::selectFirst(['id', 'network'], $condition);
 692                         if (DBA::isResult($existing)) {
 693                                 // We only log the entries with a different user id than 0. Otherwise we would have too many false positives
 694                                 if ($item['uid'] != 0) {
 695                                         Logger::notice('Item already existed for user', [
 696                                                 'uri-id' => $item['uri-id'],
 697                                                 'uid' => $item['uid'],
 698                                                 'network' => $item['network'],
 699                                                 'existing_id' => $existing['id'],
 700                                                 'existing_network' => $existing['network']
 701                                         ]);
 702                                 }
 703
 704                                 return $existing['id'];
 705                         }
 706                 }
 707                 return 0;
 708         }
 709
 710         /**
 711          * Fetch the uri-id of the parent for the given uri-id
 712          *
 713          * @param integer $uriid
 714          * @return integer
 715          */
 716         public static function getParent(int $uriid): int
 717         {
 718                 $thread_parent = Post::selectFirstPost(['thr-parent-id', 'gravity'], ['uri-id' => $uriid]);
 719                 if (empty($thread_parent)) {
 720                         return 0;
 721                 }
 722
 723                 if ($thread_parent['gravity'] == Item::GRAVITY_PARENT) {
 724                         return $uriid;
 725                 }
 726
 727                 return self::getParent($thread_parent['thr-parent-id']);
 728         }
 729
 730         /**
 731          * Fetch top-level parent data for the given item array
 732          *
 733          * @param array $item
 734          * @return array item array with parent data
 735          * @throws \Exception
 736          */
 737         private static function getTopLevelParent(array $item): array
 738         {
 739                 $fields = ['uid', 'uri', 'parent-uri', 'id', 'deleted',
 740                         'uri-id', 'parent-uri-id',
 741                         'allow_cid', 'allow_gid', 'deny_cid', 'deny_gid',
 742                         'wall', 'private', 'origin', 'author-id'];
 743                 $condition = ['uri-id' => [$item['thr-parent-id'], $item['parent-uri-id']], 'uid' => $item['uid']];
 744                 $params = ['order' => ['id' => false]];
 745                 $parent = Post::selectFirst($fields, $condition, $params);
 746
 747                 if (!DBA::isResult($parent) && Post::exists(['uri-id' => [$item['thr-parent-id'], $item['parent-uri-id']], 'uid' => 0])) {
 748                         $stored = Item::storeForUserByUriId($item['thr-parent-id'], $item['uid'], ['post-reason' => Item::PR_COMPLETION]);
 749                         if (!$stored && ($item['thr-parent-id'] != $item['parent-uri-id'])) {
 750                                 $stored = Item::storeForUserByUriId($item['parent-uri-id'], $item['uid'], ['post-reason' => Item::PR_COMPLETION]);
 751                         }
 752                         if ($stored) {
 753                                 Logger::info('Stored thread parent item for user', ['uri-id' => $item['thr-parent-id'], 'uid' => $item['uid'], 'stored' => $stored]);
 754                                 $parent = Post::selectFirst($fields, $condition, $params);
 755                         }
 756                 }
 757
 758                 if (!DBA::isResult($parent)) {
 759                         Logger::notice('item parent was not found - ignoring item', ['uri-id' => $item['uri-id'], 'thr-parent-id' => $item['thr-parent-id'], 'uid' => $item['uid'], 'callstack' => System::callstack(20)]);
 760                         return [];
 761                 }
 762
 763                 if ($parent['uri-id'] == $parent['parent-uri-id']) {
 764                         return $parent;
 765                 }
 766
 767                 $condition = ['uri-id' => $parent['parent-uri-id'],
 768                         'parent-uri-id' => $parent['parent-uri-id'],
 769                         'uid' => $parent['uid']];
 770                 $params = ['order' => ['id' => false]];
 771                 $toplevel_parent = Post::selectFirst($fields, $condition, $params);
 772
 773                 if (!DBA::isResult($toplevel_parent) && $item['origin']) {
 774                         $stored = Item::storeForUserByUriId($item['parent-uri-id'], $item['uid'], ['post-reason' => Item::PR_COMPLETION]);
 775                         Logger::info('Stored parent item for user', ['uri-id' => $item['parent-uri-id'], 'uid' => $item['uid'], 'stored' => $stored]);
 776                         $toplevel_parent = Post::selectFirst($fields, $condition, $params);
 777                 }
 778
 779                 if (!DBA::isResult($toplevel_parent)) {
 780                         Logger::notice('item top level parent was not found - ignoring item', ['parent-uri-id' => $parent['parent-uri-id'], 'uid' => $parent['uid']]);
 781                         return [];
 782                 }
 783
 784                 return $toplevel_parent;
 785         }
 786
 787         /**
 788          * Get the gravity for the given item array
 789          *
 790          * @param array $item
 791          * @return integer gravity
 792          */
 793         private static function getGravity(array $item): int
 794         {
 795                 $activity = DI::activity();
 796
 797                 if (isset($item['gravity'])) {
 798                         return intval($item['gravity']);
 799                 } elseif ($item['parent-uri-id'] === $item['uri-id']) {
 800                         return self::GRAVITY_PARENT;
 801                 } elseif ($activity->match($item['verb'], Activity::POST)) {
 802                         return self::GRAVITY_COMMENT;
 803                 } elseif ($activity->match($item['verb'], Activity::FOLLOW)) {
 804                         return self::GRAVITY_ACTIVITY;
 805                 } elseif ($activity->match($item['verb'], Activity::ANNOUNCE)) {
 806                         return self::GRAVITY_ACTIVITY;
 807                 }
 808
 809                 Logger::info('Unknown gravity for verb', ['verb' => $item['verb']]);
 810                 return self::GRAVITY_UNKNOWN;   // Should not happen
 811         }
 812
 813         /**
 814          * Inserts item record
 815          *
 816          * @param array $item Item array to be inserted
 817          * @param int   $notify Notification (type?)
 818          * @param bool  $post_local (???)
 819          * @return int Zero means error, otherwise primary key (id) is being returned
 820          */
 821         public static function insert(array $item, int $notify = 0, bool $post_local = true): int
 822         {
 823                 $orig_item = $item;
 824
 825                 $priority = Worker::PRIORITY_HIGH;
 826
 827                 // If it is a posting where users should get notifications, then define it as wall posting
 828                 if ($notify) {
 829                         $item['wall'] = 1;
 830                         $item['origin'] = 1;
 831                         $item['network'] = Protocol::DFRN;
 832                         $item['protocol'] = Conversation::PARCEL_DIRECT;
 833                         $item['direction'] = Conversation::PUSH;
 834
 835                         if (is_int($notify) && in_array($notify, Worker::PRIORITIES)) {
 836                                 $priority = $notify;
 837                         }
 838                 } else {
 839                         $item['network'] = trim(($item['network'] ?? '') ?: Protocol::PHANTOM);
 840                 }
 841
 842                 $uid = intval($item['uid']);
 843
 844                 $item['guid'] = self::guid($item, $notify);
 845                 $item['uri'] = substr(trim($item['uri'] ?? '') ?: self::newURI($item['guid']), 0, 255);
 846
 847                 // Store URI data
 848                 $item['uri-id'] = ItemURI::insert(['uri' => $item['uri'], 'guid' => $item['guid']]);
 849
 850                 // Backward compatibility: parent-uri used to be the direct parent uri.
 851                 // If it is provided without a thr-parent, it probably is the old behavior.
 852                 if (empty($item['thr-parent']) || empty($item['parent-uri'])) {
 853                         $item['thr-parent'] = trim($item['thr-parent'] ?? $item['parent-uri'] ?? $item['uri']);
 854                         $item['parent-uri'] = $item['thr-parent'];
 855                 }
 856
 857                 $item['thr-parent-id'] = ItemURI::getIdByURI($item['thr-parent']);
 858                 $item['parent-uri-id'] = ItemURI::getIdByURI($item['parent-uri']);
 859
 860                 // Store conversation data
 861                 $source = $item['source'] ?? '';
 862                 unset($item['conversation-uri']);
 863                 unset($item['conversation-href']);
 864                 unset($item['source']);
 865
 866                 /*
 867                  * Do we already have this item?
 868                  * We have to check several networks since Friendica posts could be repeated
 869                  * via OStatus (maybe Diasporsa as well)
 870                  */
 871                 $duplicate = self::getDuplicateID($item);
 872                 if ($duplicate) {
 873                         return $duplicate;
 874                 }
 875
 876                 // Additional duplicate checks
 877                 /// @todo Check why the first duplication check returns the item number and the second a 0
 878                 if (self::isDuplicate($item)) {
 879                         return 0;
 880                 }
 881
 882                 if (!isset($item['post-type'])) {
 883                         $item['post-type'] = empty($item['title']) ? self::PT_NOTE : self::PT_ARTICLE;
 884                 }
 885
 886                 $item['wall']          = intval($item['wall'] ?? 0);
 887                 $item['extid']         = trim($item['extid'] ?? '');
 888                 $item['author-name']   = trim($item['author-name'] ?? '');
 889                 $item['author-link']   = trim($item['author-link'] ?? '');
 890                 $item['author-avatar'] = trim($item['author-avatar'] ?? '');
 891                 $item['owner-name']    = trim($item['owner-name'] ?? '');
 892                 $item['owner-link']    = trim($item['owner-link'] ?? '');
 893                 $item['owner-avatar']  = trim($item['owner-avatar'] ?? '');
 894                 $item['received']      = (isset($item['received'])  ? DateTimeFormat::utc($item['received'])  : DateTimeFormat::utcNow());
 895                 $item['created']       = (isset($item['created'])   ? DateTimeFormat::utc($item['created'])   : $item['received']);
 896                 $item['edited']        = (isset($item['edited'])    ? DateTimeFormat::utc($item['edited'])    : $item['created']);
 897                 $item['changed']       = (isset($item['changed'])   ? DateTimeFormat::utc($item['changed'])   : $item['created']);
 898                 $item['commented']     = (isset($item['commented']) ? DateTimeFormat::utc($item['commented']) : $item['created']);
 899                 $item['title']         = substr(trim($item['title'] ?? ''), 0, 255);
 900                 $item['location']      = trim($item['location'] ?? '');
 901                 $item['coord']         = trim($item['coord'] ?? '');
 902                 $item['visible']       = (isset($item['visible']) ? intval($item['visible']) : 1);
 903                 $item['deleted']       = 0;
 904                 $item['verb']          = trim($item['verb'] ?? '');
 905                 $item['object-type']   = trim($item['object-type'] ?? '');
 906                 $item['object']        = trim($item['object'] ?? '');
 907                 $item['target-type']   = trim($item['target-type'] ?? '');
 908                 $item['target']        = trim($item['target'] ?? '');
 909                 $item['plink']         = substr(trim($item['plink'] ?? ''), 0, 255);
 910                 $item['allow_cid']     = trim($item['allow_cid'] ?? '');
 911                 $item['allow_gid']     = trim($item['allow_gid'] ?? '');
 912                 $item['deny_cid']      = trim($item['deny_cid'] ?? '');
 913                 $item['deny_gid']      = trim($item['deny_gid'] ?? '');
 914                 $item['private']       = intval($item['private'] ?? self::PUBLIC);
 915                 $item['body']          = trim($item['body'] ?? '');
 916                 $item['raw-body']      = trim($item['raw-body'] ?? $item['body']);
 917                 $item['app']           = trim($item['app'] ?? '');
 918                 $item['origin']        = intval($item['origin'] ?? 0);
 919                 $item['postopts']      = trim($item['postopts'] ?? '');
 920                 $item['resource-id']   = trim($item['resource-id'] ?? '');
 921                 $item['event-id']      = intval($item['event-id'] ?? 0);
 922                 $item['inform']        = trim($item['inform'] ?? '');
 923                 $item['file']          = trim($item['file'] ?? '');
 924
 925                 // Communities aren't working with the Diaspora protoccol
 926                 if (($uid != 0) && ($item['network'] == Protocol::DIASPORA)) {
 927                         $user = User::getById($uid, ['account-type']);
 928                         if ($user['account-type'] == Contact::TYPE_COMMUNITY) {
 929                                 Logger::info('Community posts are not supported via Diaspora');
 930                                 return 0;
 931                         }
 932                 }
 933
 934                 // Items cannot be stored before they happen ...
 935                 if ($item['created'] > DateTimeFormat::utcNow()) {
 936                         $item['created'] = DateTimeFormat::utcNow();
 937                 }
 938
 939                 // We haven't invented time travel by now.
 940                 if ($item['edited'] > DateTimeFormat::utcNow()) {
 941                         $item['edited'] = DateTimeFormat::utcNow();
 942                 }
 943
 944                 $item['plink'] = ($item['plink'] ?? '') ?: DI::baseUrl() . '/display/' . urlencode($item['guid']);
 945
 946                 $item['gravity'] = self::getGravity($item);
 947
 948                 $default = ['url' => $item['author-link'], 'name' => $item['author-name'],
 949                         'photo' => $item['author-avatar'], 'network' => $item['network']];
 950                 $item['author-id'] = ($item['author-id'] ?? 0) ?: Contact::getIdForURL($item['author-link'], 0, null, $default);
 951
 952                 $default = ['url' => $item['owner-link'], 'name' => $item['owner-name'],
 953                         'photo' => $item['owner-avatar'], 'network' => $item['network']];
 954                 $item['owner-id'] = ($item['owner-id'] ?? 0) ?: Contact::getIdForURL($item['owner-link'], 0, null, $default);
 955
 956                 $item['post-reason'] = self::getPostReason($item);
 957
 958                 // Ensure that there is an avatar cache
 959                 Contact::checkAvatarCache($item['author-id']);
 960                 Contact::checkAvatarCache($item['owner-id']);
 961
 962                 $item['contact-id'] = self::contactId($item);
 963
 964                 if (!empty($item['direction']) && in_array($item['direction'], [Conversation::PUSH, Conversation::RELAY]) &&
 965                         empty($item['origin']) && self::isTooOld($item)) {
 966                         Logger::info('Item is too old', ['item' => $item]);
 967                         return 0;
 968                 }
 969
 970                 if (!self::isValid($item)) {
 971                         return 0;
 972                 }
 973
 974                 if ($item['gravity'] !== self::GRAVITY_PARENT) {
 975                         $toplevel_parent = self::getTopLevelParent($item);
 976                         if (empty($toplevel_parent)) {
 977                                 return 0;
 978                         }
 979
 980                         // If the thread originated from this node, we check the permission against the thread starter
 981                         $condition = ['uri-id' => $toplevel_parent['uri-id'], 'wall' => true];
 982                         $localTopLevelParent = Post::selectFirst(['uid'], $condition);
 983                         if (!empty($localTopLevelParent['uid']) && !self::isAllowedByUser($item, $localTopLevelParent['uid'])) {
 984                                 return 0;
 985                         }
 986
 987                         $parent_id             = $toplevel_parent['id'];
 988                         $item['parent-uri']    = $toplevel_parent['uri'];
 989                         $item['parent-uri-id'] = $toplevel_parent['uri-id'];
 990                         $item['deleted']       = $toplevel_parent['deleted'];
 991
 992                         // Reshares have to keep their permissions to allow forums to work
 993                         if (!$item['origin'] || ($item['verb'] != Activity::ANNOUNCE)) {
 994                                 $item['allow_cid']     = $toplevel_parent['allow_cid'];
 995                                 $item['allow_gid']     = $toplevel_parent['allow_gid'];
 996                                 $item['deny_cid']      = $toplevel_parent['deny_cid'];
 997                                 $item['deny_gid']      = $toplevel_parent['deny_gid'];
 998                         }
 999
1000                         $parent_origin         = $toplevel_parent['origin'];
1001
1002                         // Don't federate received participation messages
1003                         if ($item['verb'] != Activity::FOLLOW) {
1004                                 $item['wall'] = $toplevel_parent['wall'];
1005                         } else {
1006                                 $item['wall'] = false;
1007                                 // Participations are technical messages, so they are set to "seen" automatically
1008                                 $item['unseen'] = false;
1009                         }
1010
1011                         /*
1012                          * If the parent is private, force privacy for the entire conversation
1013                          * This differs from the above settings as it subtly allows comments from
1014                          * email correspondents to be private even if the overall thread is not.
1015                          */
1016                         if ($toplevel_parent['private']) {
1017                                 $item['private'] = $toplevel_parent['private'];
1018                         }
1019
1020                         // If its a post that originated here then tag the thread as "mention"
1021                         if ($item['origin'] && $item['uid']) {
1022                                 DBA::update('post-thread-user', ['mention' => true], ['uri-id' => $item['parent-uri-id'], 'uid' => $item['uid']]);
1023                                 Logger::info('tagged thread as mention', ['parent' => $parent_id, 'parent-uri-id' => $item['parent-uri-id'], 'uid' => $item['uid']]);
1024                         }
1025
1026                         // Update the contact relations
1027                         Contact\Relation::store($toplevel_parent['author-id'], $item['author-id'], $item['created']);
1028                 } else {
1029                         $parent_id = 0;
1030                         $parent_origin = $item['origin'];
1031
1032                         if ($item['wall'] && empty($item['conversation'])) {
1033                                 $item['conversation'] = $item['parent-uri'] . '#context';
1034                         }
1035                 }
1036
1037                 $item['parent-uri-id'] = ItemURI::getIdByURI($item['parent-uri']);
1038                 $item['thr-parent-id'] = ItemURI::getIdByURI($item['thr-parent']);
1039
1040                 if (!empty($item['conversation']) && empty($item['conversation-id'])) {
1041                         $item['conversation-id'] = ItemURI::getIdByURI($item['conversation']);
1042                 }
1043
1044                 // Is this item available in the global items (with uid=0)?
1045                 if ($item['uid'] == 0) {
1046                         $item['global'] = true;
1047
1048                         // Set the global flag on all items if this was a global item entry
1049                         Post::update(['global' => true], ['uri-id' => $item['uri-id']]);
1050                 } else {
1051                         $item['global'] = Post::exists(['uid' => 0, 'uri-id' => $item['uri-id']]);
1052                 }
1053
1054                 // ACL settings
1055                 if (!empty($item['allow_cid'] . $item['allow_gid'] . $item['deny_cid'] . $item['deny_gid'])) {
1056                         $item['private'] = self::PRIVATE;
1057                 }
1058
1059                 if ($notify && $post_local) {
1060                         $item['edit'] = false;
1061                         $item['parent'] = $parent_id;
1062
1063                         // Trigger automatic reactions for addons
1064                         if (!isset($item['api_source'])) {
1065                                 $item['api_source'] = true;
1066                         }
1067
1068                         // We have to tell the hooks who we are - this really should be improved
1069                         if (!local_user()) {
1070                                 $_SESSION['authenticated'] = true;
1071                                 $_SESSION['uid'] = $uid;
1072                                 $dummy_session = true;
1073                         } else {
1074                                 $dummy_session = false;
1075                         }
1076
1077                         Hook::callAll('post_local', $item);
1078
1079                         if ($dummy_session) {
1080                                 unset($_SESSION['authenticated']);
1081                                 unset($_SESSION['uid']);
1082                         }
1083                 } elseif (!$notify) {
1084                         Hook::callAll('post_remote', $item);
1085                 }
1086
1087                 if (!empty($item['cancel'])) {
1088                         Logger::notice('post cancelled by addon.');
1089                         return 0;
1090                 }
1091
1092                 if (empty($item['vid']) && !empty($item['verb'])) {
1093                         $item['vid'] = Verb::getID($item['verb']);
1094                 }
1095
1096                 // Creates or assigns the permission set
1097                 $item['psid'] = DI::permissionSet()->selectOrCreate(
1098                         DI::permissionSetFactory()->createFromString(
1099                                 $item['uid'],
1100                                 $item['allow_cid'],
1101                                 $item['allow_gid'],
1102                                 $item['deny_cid'],
1103                                 $item['deny_gid']
1104                 ))->id;
1105
1106                 if (!empty($item['extid'])) {
1107                         $item['external-id'] = ItemURI::getIdByURI($item['extid']);
1108                 }
1109
1110                 if ($item['verb'] == Activity::ANNOUNCE) {
1111                         self::setOwnerforResharedItem($item);
1112                 }
1113
1114                 if (isset($item['attachments'])) {
1115                         foreach ($item['attachments'] as $attachment) {
1116                                 $attachment['uri-id'] = $item['uri-id'];
1117                                 Post\Media::insert($attachment);
1118                         }
1119                         unset($item['attachments']);
1120                 }
1121
1122                 Post\Media::insertFromAttachmentData($item['uri-id'], $item['body']);
1123
1124                 // Remove all media attachments from the body and store them in the post-media table
1125                 $item['raw-body'] = Post\Media::insertFromBody($item['uri-id'], $item['raw-body']);
1126                 $item['raw-body'] = self::setHashtags($item['raw-body']);
1127
1128                 $quote_id = self::getQuoteUriId($item['body']);
1129
1130                 if (!empty($quote_id) && Post::exists(['uri-id' => $quote_id, 'network' => Protocol::FEDERATED])) {
1131                         $item['quote-uri-id'] = $quote_id;
1132                         $item['raw-body'] = BBCode::removeSharedData($item['raw-body']);
1133                 }
1134
1135                 if (!DBA::exists('contact', ['id' => $item['author-id'], 'network' => Protocol::DFRN])) {
1136                         Post\Media::insertFromRelevantUrl($item['uri-id'], $item['raw-body']);
1137                 }
1138
1139                 // Check for hashtags in the body and repair or add hashtag links
1140                 $item['body'] = self::setHashtags($item['body']);
1141
1142                 $item['language'] = self::getLanguage($item);
1143
1144                 $notify_type = Delivery::POST;
1145
1146                 // Filling item related side tables
1147                 if (!empty($item['attach'])) {
1148                         Post\Media::insertFromAttachment($item['uri-id'], $item['attach']);
1149                 }
1150
1151                 if (empty($item['event-id'])) {
1152                         unset($item['event-id']);
1153
1154                         $ev = Event::fromBBCode($item['body']);
1155                         if ((!empty($ev['desc']) || !empty($ev['summary'])) && !empty($ev['start'])) {
1156                                 Logger::info('Event found.');
1157                                 $ev['cid']       = $item['contact-id'];
1158                                 $ev['uid']       = $item['uid'];
1159                                 $ev['uri']       = $item['uri'];
1160                                 $ev['edited']    = $item['edited'];
1161                                 $ev['private']   = $item['private'];
1162                                 $ev['guid']      = $item['guid'];
1163                                 $ev['plink']     = $item['plink'];
1164                                 $ev['network']   = $item['network'];
1165                                 $ev['protocol']  = $item['protocol'] ?? Conversation::PARCEL_UNKNOWN;
1166                                 $ev['direction'] = $item['direction'] ?? Conversation::UNKNOWN;
1167                                 $ev['source']    = $item['source'] ?? '';
1168
1169                                 $event = DBA::selectFirst('event', ['id'], ['uri' => $item['uri'], 'uid' => $item['uid']]);
1170                                 if (DBA::isResult($event)) {
1171                                         $ev['id'] = $event['id'];
1172                                 }
1173
1174                                 $event_id = Event::store($ev);
1175                                 $item = Event::getItemArrayForImportedId($event_id, $item);
1176
1177                                 Logger::info('Event was stored', ['id' => $event_id]);
1178                         }
1179                 }
1180
1181                 if (empty($item['causer-id'])) {
1182                         unset($item['causer-id']);
1183                 }
1184
1185                 if (in_array($item['network'], [Protocol::ACTIVITYPUB, Protocol::DFRN])) {
1186                         $content_warning = BBCode::getAbstract($item['body'], Protocol::ACTIVITYPUB);
1187                         if (!empty($content_warning) && empty($item['content-warning'])) {
1188                                 $item['content-warning'] = BBCode::toPlaintext($content_warning);
1189                         }
1190                 }
1191
1192                 Post::insert($item['uri-id'], $item);
1193
1194                 if ($item['gravity'] == self::GRAVITY_PARENT) {
1195                         Post\Thread::insert($item['uri-id'], $item);
1196                 }
1197
1198                 if (!in_array($item['verb'], self::ACTIVITIES)) {
1199                         Post\Content::insert($item['uri-id'], $item);
1200                 }
1201
1202                 // Create Diaspora signature
1203                 if ($item['origin'] && empty($item['diaspora_signed_text']) && ($item['gravity'] != self::GRAVITY_PARENT)) {
1204                         $signed = Diaspora::createCommentSignature($item);
1205                         if (!empty($signed)) {
1206                                 $item['diaspora_signed_text'] = json_encode($signed);
1207                         }
1208                 }
1209
1210                 if (!empty($item['diaspora_signed_text'])) {
1211                         DBA::replace('diaspora-interaction', ['uri-id' => $item['uri-id'], 'interaction' => $item['diaspora_signed_text']]);
1212                 }
1213
1214                 // Attached file links
1215                 if (!empty($item['file'])) {
1216                         Post\Category::storeTextByURIId($item['uri-id'], $item['uid'], $item['file']);
1217                 }
1218
1219                 // Delivery relevant data
1220                 $delivery_data = Post\DeliveryData::extractFields($item);
1221
1222                 if (!empty($item['origin']) || !empty($item['wall']) || !empty($delivery_data['postopts']) || !empty($delivery_data['inform'])) {
1223                         Post\DeliveryData::insert($item['uri-id'], $delivery_data);
1224                 }
1225
1226                 // Store tags from the body if this hadn't been handled previously in the protocol classes
1227                 if (!Tag::existsForPost($item['uri-id'])) {
1228                         Tag::storeFromBody($item['uri-id'], $item['body']);
1229                 }
1230
1231                 $condition = ['uri-id' => $item['uri-id'], 'uid' => $item['uid']];
1232                 if (Post::exists($condition)) {
1233                         Logger::notice('Item is already inserted - aborting', $condition);
1234                         return 0;
1235                 }
1236
1237                 $post_user_id = Post\User::insert($item['uri-id'], $item['uid'], $item);
1238                 if (!$post_user_id) {
1239                         Logger::notice('Post-User is already inserted - aborting', ['uid' => $item['uid'], 'uri-id' => $item['uri-id']]);
1240                         return 0;
1241                 }
1242
1243                 if ($item['gravity'] == self::GRAVITY_PARENT) {
1244                         $item['post-user-id'] = $post_user_id;
1245                         Post\ThreadUser::insert($item['uri-id'], $item['uid'], $item);
1246                 }
1247
1248                 Logger::notice('created item', ['post-id' => $post_user_id, 'uid' => $item['uid'], 'network' => $item['network'], 'uri-id' => $item['uri-id'], 'guid' => $item['guid']]);
1249
1250                 $posted_item = Post::selectFirst(self::ITEM_FIELDLIST, ['post-user-id' => $post_user_id]);
1251                 if (!DBA::isResult($posted_item)) {
1252                         // On failure store the data into a spool file so that the "SpoolPost" worker can try again later.
1253                         Logger::warning('Could not store item. it will be spooled', ['id' => $post_user_id]);
1254                         self::spool($orig_item);
1255                         return 0;
1256                 }
1257
1258                 // update the commented timestamp on the parent
1259                 if (DI::config()->get('system', 'like_no_comment')) {
1260                         // Update when it is a comment
1261                         $update_commented = in_array($posted_item['gravity'], [self::GRAVITY_PARENT, self::GRAVITY_COMMENT]);
1262                 } else {
1263                         // Update when it isn't a follow or tag verb
1264                         $update_commented = !in_array($posted_item['verb'], [Activity::FOLLOW, Activity::TAG]);
1265                 }
1266
1267                 if ($update_commented) {
1268                         $fields = ['commented' => DateTimeFormat::utcNow(), 'changed' => DateTimeFormat::utcNow()];
1269                 } else {
1270                         $fields = ['changed' => DateTimeFormat::utcNow()];
1271                 }
1272
1273                 Post::update($fields, ['uri-id' => $posted_item['parent-uri-id'], 'uid' => $posted_item['uid']]);
1274
1275                 // In that function we check if this is a forum post. Additionally we delete the item under certain circumstances
1276                 if (self::tagDeliver($posted_item['uid'], $post_user_id)) {
1277                         // Get the user information for the logging
1278                         $user = User::getById($uid);
1279
1280                         Logger::notice('Item had been deleted', ['id' => $post_user_id, 'user' => $uid, 'account-type' => $user['account-type']]);
1281                         return 0;
1282                 }
1283
1284                 if ($notify) {
1285                         if (!\Friendica\Content\Feature::isEnabled($posted_item['uid'], 'explicit_mentions') && ($posted_item['gravity'] == self::GRAVITY_COMMENT)) {
1286                                 Tag::createImplicitMentions($posted_item['uri-id'], $posted_item['thr-parent-id']);
1287                         }
1288                         Hook::callAll('post_local_end', $posted_item);
1289                 } else {
1290                         Hook::callAll('post_remote_end', $posted_item);
1291                 }
1292
1293                 if ($posted_item['gravity'] === self::GRAVITY_PARENT) {
1294                         self::addShadow($post_user_id);
1295                 } else {
1296                         self::addShadowPost($post_user_id);
1297                 }
1298
1299                 self::updateContact($posted_item);
1300
1301                 Post\UserNotification::setNotification($posted_item['uri-id'], $posted_item['uid']);
1302
1303                 // Distribute items to users who subscribed to their tags
1304                 self::distributeByTags($posted_item);
1305
1306                 // Automatically reshare the item if the "remote_self" option is selected
1307                 self::autoReshare($posted_item);
1308
1309                 $transmit = $notify || ($posted_item['visible'] && ($parent_origin || $posted_item['origin']));
1310
1311                 if ($transmit) {
1312                         // Don't relay participation messages
1313                         if (($posted_item['verb'] == Activity::FOLLOW) &&
1314                                 (!$posted_item['origin'] || ($posted_item['author-id'] != Contact::getPublicIdByUserId($uid)))) {
1315                                 Logger::info('Participation messages will not be relayed', ['item' => $posted_item['id'], 'uri' => $posted_item['uri'], 'verb' => $posted_item['verb']]);
1316                                 $transmit = false;
1317                         }
1318                 }
1319
1320                 if ($transmit) {
1321                         if (!empty($source)) {
1322                                 Post\Activity::insert($item['uri-id'], $source);
1323                         }
1324                         Worker::add(['priority' => $priority, 'dont_fork' => true], 'Notifier', $notify_type, (int)$posted_item['uri-id'], (int)$posted_item['uid']);
1325                 }
1326
1327                 // Fill the cache with the rendered content.
1328                 if (in_array($posted_item['gravity'], [self::GRAVITY_PARENT, self::GRAVITY_COMMENT]) && ($posted_item['uid'] == 0)) {
1329                         self::updateDisplayCache($posted_item['uri-id']);
1330                 }
1331
1332                 return $post_user_id;
1333         }
1334
1335         /**
1336          * Fetch the post reason for a given item array
1337          *
1338          * @param array $item
1339          *
1340          * @return integer
1341          */
1342         public static function getPostReason(array $item): int
1343         {
1344                 $actor = ($item['gravity'] == self::GRAVITY_PARENT) ? $item['owner-id'] : $item['author-id'];
1345                 if (empty($item['origin']) && ($item['uid'] != 0) && Contact::isSharing($actor, $item['uid'])) {
1346                         return self::PR_FOLLOWER;
1347                 }
1348
1349                 if (!empty($item['origin']) && empty($item['post-reason'])) {
1350                         return self::PR_LOCAL;
1351                 }
1352
1353                 return $item['post-reason'] ?? self::PR_NONE;
1354         }
1355
1356         /**
1357          * Update the display cache
1358          *
1359          * @param integer $uri_id
1360          * @return void
1361          */
1362         public static function updateDisplayCache(int $uri_id)
1363         {
1364                 $item = Post::selectFirst(self::DISPLAY_FIELDLIST, ['uri-id' => $uri_id]);
1365                 self::prepareBody($item, false, false, true);
1366         }
1367
1368         /**
1369          * Change the owner of a parent item if it had been shared by a forum
1370          *
1371          * (public) forum posts in the new format consist of the regular post by the author
1372          * followed by an announce message sent from the forum account.
1373          * Changing the owner helps in grouping forum posts.
1374          *
1375          * @param array $item
1376          * @return void
1377          */
1378         private static function setOwnerforResharedItem(array $item)
1379         {
1380                 $parent = Post::selectFirst(['id', 'causer-id', 'owner-id', 'author-id', 'author-link', 'origin', 'post-reason'],
1381                         ['uri-id' => $item['thr-parent-id'], 'uid' => $item['uid']]);
1382                 if (!DBA::isResult($parent)) {
1383                         Logger::error('Parent not found', ['uri-id' => $item['thr-parent-id'], 'uid' => $item['uid']]);
1384                         return;
1385                 }
1386
1387                 $author = Contact::selectFirst(['url', 'contact-type', 'network'], ['id' => $item['author-id']]);
1388                 if (!DBA::isResult($author)) {
1389                         Logger::error('Author not found', ['id' => $item['author-id']]);
1390                         return;
1391                 }
1392
1393                 $self_contact = Contact::selectFirst(['id'], ['uid' => $item['uid'], 'self' => true]);
1394                 $self = !empty($self_contact) ? $self_contact['id'] : 0;
1395
1396                 $cid = Contact::getIdForURL($author['url'], $item['uid']);
1397                 if (empty($cid) || (!Contact::isSharing($cid, $item['uid']) && ($cid != $self))) {
1398                         Logger::info('The resharer is not a following contact: quit', ['resharer' => $author['url'], 'uid' => $item['uid'], 'cid' => $cid]);
1399                         return;
1400                 }
1401
1402                 if ($author['contact-type'] != Contact::TYPE_COMMUNITY) {
1403                         if ($parent['post-reason'] == self::PR_ANNOUNCEMENT) {
1404                                 Logger::info('The parent is already marked as announced: quit', ['causer' => $parent['causer-id'], 'owner' => $parent['owner-id'], 'author' => $parent['author-id'], 'uid' => $item['uid']]);
1405                                 return;
1406                         }
1407
1408                         if (Contact::isSharing($parent['owner-id'], $item['uid'])) {
1409                                 Logger::info('The resharer is no forum: quit', ['resharer' => $item['author-id'], 'owner' => $parent['owner-id'], 'author' => $parent['author-id'], 'uid' => $item['uid']]);
1410                                 return;
1411                         }
1412                 }
1413
1414                 self::update(['post-reason' => self::PR_ANNOUNCEMENT, 'causer-id' => $item['author-id']], ['id' => $parent['id']]);
1415                 Logger::info('Set announcement post-reason', ['uri-id' => $item['uri-id'], 'thr-parent-id' => $item['thr-parent-id'], 'uid' => $item['uid']]);
1416         }
1417
1418         /**
1419          * Distribute the given item to users who subscribed to their tags
1420          *
1421          * @param array $item     Processed item
1422          */
1423         private static function distributeByTags(array $item)
1424         {
1425                 if (($item['uid'] != 0) || ($item['gravity'] != self::GRAVITY_PARENT) || !in_array($item['network'], Protocol::FEDERATED)) {
1426                         return;
1427                 }
1428
1429                 $uids = Tag::getUIDListByURIId($item['uri-id']);
1430                 foreach ($uids as $uid) {
1431                         $stored = self::storeForUserByUriId($item['uri-id'], $uid, ['post-reason' => self::PR_TAG]);
1432                         Logger::info('Stored item for users', ['uri-id' => $item['uri-id'], 'uid' => $uid, 'stored' => $stored]);
1433                 }
1434         }
1435
1436         /**
1437          * Distributes public items to the receivers
1438          *
1439          * @param integer $itemid      Item ID that should be added
1440          * @param string  $signed_text Original text (for Diaspora signatures), JSON encoded.
1441          * @throws \Exception
1442          */
1443         public static function distribute(int $itemid, string $signed_text = '')
1444         {
1445                 $condition = ["`id` IN (SELECT `parent` FROM `post-user-view` WHERE `id` = ?)", $itemid];
1446                 $parent = Post::selectFirst(['owner-id'], $condition);
1447                 if (!DBA::isResult($parent)) {
1448                         Logger::warning('Item not found', ['condition' => $condition]);
1449                         return;
1450                 }
1451
1452                 // Only distribute public items from native networks
1453                 $condition = ['id' => $itemid, 'uid' => 0,
1454                         'network' => array_merge(Protocol::FEDERATED ,['']),
1455                         'visible' => true, 'deleted' => false, 'private' => [self::PUBLIC, self::UNLISTED]];
1456                 $item = Post::selectFirst(array_merge(self::ITEM_FIELDLIST, ['protocol']), $condition);
1457                 if (!DBA::isResult($item)) {
1458                         Logger::warning('Item not found', ['condition' => $condition]);
1459                         return;
1460                 }
1461
1462                 $origin = $item['origin'];
1463
1464                 $users = [];
1465
1466                 /// @todo add a field "pcid" in the contact table that referrs to the public contact id.
1467                 $owner = DBA::selectFirst('contact', ['url', 'nurl', 'alias'], ['id' => $parent['owner-id']]);
1468                 if (!DBA::isResult($owner)) {
1469                         return;
1470                 }
1471
1472                 $condition = ['nurl' => $owner['nurl'], 'rel' => [Contact::SHARING, Contact::FRIEND]];
1473                 $contacts = DBA::select('contact', ['uid'], $condition);
1474                 while ($contact = DBA::fetch($contacts)) {
1475                         if ($contact['uid'] == 0) {
1476                                 continue;
1477                         }
1478
1479                         $users[$contact['uid']] = $contact['uid'];
1480                 }
1481                 DBA::close($contacts);
1482
1483                 $condition = ['alias' => $owner['url'], 'rel' => [Contact::SHARING, Contact::FRIEND]];
1484                 $contacts = DBA::select('contact', ['uid'], $condition);
1485                 while ($contact = DBA::fetch($contacts)) {
1486                         if ($contact['uid'] == 0) {
1487                                 continue;
1488                         }
1489
1490                         $users[$contact['uid']] = $contact['uid'];
1491                 }
1492                 DBA::close($contacts);
1493
1494                 if (!empty($owner['alias'])) {
1495                         $condition = ['nurl' => Strings::normaliseLink($owner['alias']), 'rel' => [Contact::SHARING, Contact::FRIEND]];
1496                         $contacts = DBA::select('contact', ['uid'], $condition);
1497                         while ($contact = DBA::fetch($contacts)) {
1498                                 if ($contact['uid'] == 0) {
1499                                         continue;
1500                                 }
1501
1502                                 $users[$contact['uid']] = $contact['uid'];
1503                         }
1504                         DBA::close($contacts);
1505                 }
1506
1507                 $origin_uid = 0;
1508
1509                 if ($item['uri-id'] != $item['parent-uri-id']) {
1510                         $parents = Post::select(['uid', 'origin'], ["`uri-id` = ? AND `uid` != 0", $item['parent-uri-id']]);
1511                         while ($parent = Post::fetch($parents)) {
1512                                 $users[$parent['uid']] = $parent['uid'];
1513                                 if ($parent['origin'] && !$origin) {
1514                                         $origin_uid = $parent['uid'];
1515                                 }
1516                         }
1517                         DBA::close($parents);
1518                 }
1519
1520                 foreach ($users as $uid) {
1521                         if ($origin_uid == $uid) {
1522                                 $item['diaspora_signed_text'] = $signed_text;
1523                         }
1524                         $item['post-reason'] = self::PR_DISTRIBUTE;
1525                         self::storeForUser($item, $uid);
1526                 }
1527         }
1528
1529         /**
1530          * Store a public item defined by their URI-ID for the given users
1531          *
1532          * @param integer $uri_id     URI-ID of the given item
1533          * @param integer $uid        The user that will receive the item entry
1534          * @param array   $fields     Additional fields to be stored
1535          * @param integer $source_uid User id of the source post
1536          * @return integer stored item id
1537          */
1538         public static function storeForUserByUriId(int $uri_id, int $uid, array $fields = [], int $source_uid = 0): int
1539         {
1540                 if ($uid == $source_uid) {
1541                         Logger::warning('target UID must not be be equal to the source UID', ['uri-id' => $uri_id, 'uid' => $uid]);
1542                         return 0;
1543                 }
1544
1545                 $item = Post::selectFirst(array_merge(self::ITEM_FIELDLIST, ['protocol']), ['uri-id' => $uri_id, 'uid' => $source_uid]);
1546                 if (!DBA::isResult($item)) {
1547                         Logger::warning('Item could not be fetched', ['uri-id' => $uri_id, 'uid' => $source_uid]);
1548                         return 0;
1549                 }
1550
1551                 if (($uid != 0) && ($item['gravity'] == self::GRAVITY_PARENT)) {
1552                         $owner = User::getOwnerDataById($uid);
1553                         if (($owner['contact-type'] == User::ACCOUNT_TYPE_COMMUNITY) && !Tag::isMentioned($uri_id, $owner['url'])) {
1554                                 Logger::info('Target user is a forum but is not mentioned here, thread will not be stored', ['uid' => $uid, 'uri-id' => $uri_id]);
1555                                 return 0;
1556                         }
1557                 }
1558
1559                 if (($source_uid == 0) && (($item['private'] == self::PRIVATE) || !in_array($item['network'], Protocol::FEDERATED))) {
1560                         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']]);
1561                         return 0;
1562                 }
1563
1564                 $item['post-reason'] = self::PR_STORED;
1565
1566                 $item = array_merge($item, $fields);
1567
1568                 if (($uid != 0) && Contact::isSharing(($item['gravity'] == Item::GRAVITY_PARENT) ? $item['owner-id'] : $item['author-id'], $uid)) {
1569                         $item['post-reason'] = self::PR_FOLLOWER;
1570                 }
1571
1572                 $is_reshare = ($item['gravity'] == self::GRAVITY_ACTIVITY) && ($item['verb'] == Activity::ANNOUNCE);
1573
1574                 if (($uid != 0) && (($item['gravity'] == self::GRAVITY_PARENT) || $is_reshare) &&
1575                         DI::pConfig()->get($uid, 'system', 'accept_only_sharer') == self::COMPLETION_NONE &&
1576                         !in_array($item['post-reason'], [self::PR_FOLLOWER, self::PR_TAG, self::PR_TO, self::PR_CC])) {
1577                         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']]);
1578                         return 0;
1579                 }
1580
1581                 $causer = $item['causer-id'] ?: $item['author-id'];
1582
1583                 if (($uri_id != $item['parent-uri-id']) && ($item['gravity'] == self::GRAVITY_COMMENT) && !Post::exists(['uri-id' => $item['parent-uri-id'], 'uid' => $uid])) {
1584                         if (!self::fetchParent($item['parent-uri-id'], $uid, $causer)) {
1585                                 Logger::info('Parent post had not been added', ['uri-id' => $item['parent-uri-id'], 'uid' => $uid, 'causer' => $causer]);
1586                                 return 0;
1587                         }
1588                         Logger::info('Fetched parent post', ['uri-id' => $item['parent-uri-id'], 'uid' => $uid, 'causer' => $causer]);
1589                 } elseif (($uri_id != $item['thr-parent-id']) && $is_reshare && !Post::exists(['uri-id' => $item['thr-parent-id'], 'uid' => $uid])) {
1590                         if (!self::fetchParent($item['thr-parent-id'], $uid, $causer)) {
1591                                 Logger::info('Thread parent had not been added', ['uri-id' => $item['thr-parent-id'], 'uid' => $uid, 'causer' => $causer]);
1592                                 return 0;
1593                         }
1594                         Logger::info('Fetched thread parent', ['uri-id' => $item['thr-parent-id'], 'uid' => $uid, 'causer' => $causer]);
1595                 }
1596
1597                 $stored = self::storeForUser($item, $uid);
1598                 Logger::info('Item stored for user', ['uri-id' => $item['uri-id'], 'uid' => $uid, 'causer' => $causer, 'source-uid' => $source_uid, 'stored' => $stored]);
1599                 return $stored;
1600         }
1601
1602         /**
1603          * Fetch the parent with the given uri-id
1604          *
1605          * @param integer $uri_id
1606          * @param integer $uid
1607          * @param integer $causer
1608          *
1609          * @return integer
1610          */
1611         private static function fetchParent(int $uri_id, int $uid, int $causer): int
1612         {
1613                 // Fetch the origin user for the post
1614                 $origin_uid = self::GetOriginUidForUriId($uri_id, $uid);
1615                 if (is_null($origin_uid)) {
1616                         Logger::info('Origin item was not found', ['uid' => $uid, 'uri-id' => $uri_id]);
1617                         return 0;
1618                 }
1619
1620                 return self::storeForUserByUriId($uri_id, $uid, ['causer-id' => $causer, 'post-reason' => self::PR_FETCHED], $origin_uid);
1621         }
1622
1623         /**
1624          * Returns the origin uid of a post if the given user is allowed to see it.
1625          *
1626          * @param int $uriid
1627          * @param int $uid
1628          * @return int
1629          */
1630         private static function GetOriginUidForUriId(int $uriid, int $uid)
1631         {
1632                 if (Post::exists(['uri-id' => $uriid, 'uid' => $uid])) {
1633                         return $uid;
1634                 }
1635
1636                 $post = Post::selectFirst(['uid', 'allow_cid', 'allow_gid', 'deny_cid', 'deny_gid', 'private'], ['uri-id' => $uriid, 'origin' => true]);
1637                 if (!empty($post)) {
1638                         if (in_array($post['private'], [Item::PUBLIC, Item::UNLISTED])) {
1639                                 return $post['uid'];
1640                         }
1641
1642                         $pcid = Contact::getPublicIdByUserId($uid);
1643                         if (empty($pcid)) {
1644                                 return null;
1645                         }
1646
1647                         foreach (Item::enumeratePermissions($post, true) as $receiver) {
1648                                 if ($receiver == $pcid) {
1649                                         return $post['uid'];
1650                                 }
1651                         }
1652
1653                         return null;
1654                 }
1655
1656                 if (Post::exists(['uri-id' => $uriid, 'uid' => 0])) {
1657                         return 0;
1658                 }
1659
1660                 // When the post belongs to a a forum then all forum users are allowed to access it
1661                 foreach (Tag::getByURIId($uriid, [Tag::MENTION, Tag::EXCLUSIVE_MENTION]) as $tag) {
1662                         if (DBA::exists('contact', ['uid' => $uid, 'nurl' => Strings::normaliseLink($tag['url']), 'contact-type' => Contact::TYPE_COMMUNITY])) {
1663                                 $target_uid = User::getIdForURL($tag['url']);
1664                                 if (!empty($target_uid)) {
1665                                         return $target_uid;
1666                                 }
1667                         }
1668                 }
1669
1670                 return null;
1671         }
1672
1673         /**
1674          * Store a public item array for the given users
1675          *
1676          * @param array   $item   The item entry that will be stored
1677          * @param integer $uid    The user that will receive the item entry
1678          * @return integer stored item id
1679          * @throws \Exception
1680          */
1681         private static function storeForUser(array $item, int $uid): int
1682         {
1683                 $post = Post::selectFirst(['id'], ['uri-id' => $item['uri-id'], 'uid' => $uid]);
1684                 if (!empty($post['id'])) {
1685                         if (!empty($item['event-id'])) {
1686                                 $event_post = Post::selectFirst(['event-id'], ['uri-id' => $item['uri-id'], 'uid' => $uid]);
1687                                 if (!empty($event_post['event-id'])) {
1688                                         $event = DBA::selectFirst('event', ['edited', 'start', 'finish', 'summary', 'desc', 'location', 'nofinish', 'adjust'], ['id' => $item['event-id']]);
1689                                         if (!empty($event)) {
1690                                                 // We aren't using "Event::store" here, since we don't want to trigger any further action
1691                                                 $ret = DBA::update('event', $event, ['id' => $event_post['event-id']]);
1692                                                 Logger::info('Event updated', ['uid' => $uid, 'source-event' => $item['event-id'], 'target-event' => $event_post['event-id'], 'ret' => $ret]);
1693                                         }
1694                                 }
1695                         }
1696                         Logger::info('Item already exists', ['uri-id' => $item['uri-id'], 'uid' => $uid, 'id' => $post['id']]);
1697                         return $post['id'];
1698                 }
1699
1700                 // Data from the "post-user" table
1701                 unset($item['id']);
1702                 unset($item['mention']);
1703                 unset($item['starred']);
1704                 unset($item['unseen']);
1705                 unset($item['psid']);
1706                 unset($item['pinned']);
1707                 unset($item['ignored']);
1708                 unset($item['pubmail']);
1709                 unset($item['event-id']);
1710                 unset($item['hidden']);
1711                 unset($item['notification-type']);
1712
1713                 // Data from the "post-delivery-data" table
1714                 unset($item['postopts']);
1715                 unset($item['inform']);
1716
1717                 $item['uid'] = $uid;
1718                 $item['origin'] = 0;
1719                 $item['wall'] = 0;
1720
1721                 $item['contact-id'] = self::contactId($item);
1722
1723                 $notify = false;
1724                 if ($item['gravity'] == self::GRAVITY_PARENT) {
1725                         $contact = DBA::selectFirst('contact', [], ['id' => $item['contact-id'], 'self' => false]);
1726                         if (DBA::isResult($contact)) {
1727                                 $notify = self::isRemoteSelf($contact, $item);
1728                         }
1729                 }
1730
1731                 $distributed = self::insert($item, $notify);
1732
1733                 if (!$distributed) {
1734                         Logger::info("Distributed item wasn't stored", ['uri-id' => $item['uri-id'], 'user' => $uid]);
1735                 } else {
1736                         Logger::info('Distributed item was stored', ['uri-id' => $item['uri-id'], 'user' => $uid, 'stored' => $distributed]);
1737                 }
1738                 return $distributed;
1739         }
1740
1741         /**
1742          * Add a shadow entry for a given item id that is a thread starter
1743          *
1744          * We store every public item entry additionally with the user id "0".
1745          * This is used for the community page and for the search.
1746          * It is planned that in the future we will store public item entries only once.
1747          *
1748          * @param integer $itemid Item ID that should be added
1749          * @throws \Exception
1750          */
1751         private static function addShadow(int $itemid)
1752         {
1753                 $fields = ['uid', 'private', 'visible', 'deleted', 'network', 'uri-id'];
1754                 $condition = ['id' => $itemid, 'gravity' => self::GRAVITY_PARENT];
1755                 $item = Post::selectFirst($fields, $condition);
1756
1757                 if (!DBA::isResult($item)) {
1758                         return;
1759                 }
1760
1761                 // is it already a copy?
1762                 if (($itemid == 0) || ($item['uid'] == 0)) {
1763                         return;
1764                 }
1765
1766                 // Is it a visible public post?
1767                 if (!$item["visible"] || $item["deleted"]  || ($item["private"] == self::PRIVATE)) {
1768                         return;
1769                 }
1770
1771                 // is it an entry from a connector? Only add an entry for natively connected networks
1772                 if (!in_array($item["network"], array_merge(Protocol::FEDERATED ,['']))) {
1773                         return;
1774                 }
1775
1776                 if (Post::exists(['uri-id' => $item['uri-id'], 'uid' => 0])) {
1777                         return;
1778                 }
1779
1780                 $item = Post::selectFirst(array_merge(self::ITEM_FIELDLIST, ['protocol']), ['id' => $itemid]);
1781
1782                 if (DBA::isResult($item)) {
1783                         // Preparing public shadow (removing user specific data)
1784                         $item['uid'] = 0;
1785                         unset($item['id']);
1786                         unset($item['parent']);
1787                         unset($item['wall']);
1788                         unset($item['mention']);
1789                         unset($item['origin']);
1790                         unset($item['starred']);
1791                         unset($item['postopts']);
1792                         unset($item['inform']);
1793                         unset($item['post-reason']);
1794                         if ($item['uri-id'] == $item['parent-uri-id']) {
1795                                 $item['contact-id'] = $item['owner-id'];
1796                         } else {
1797                                 $item['contact-id'] = $item['author-id'];
1798                         }
1799
1800                         $public_shadow = self::insert($item);
1801
1802                         Logger::info('Stored public shadow', ['thread' => $itemid, 'id' => $public_shadow]);
1803                 }
1804         }
1805
1806         /**
1807          * Add a shadow entry for a given item id that is a comment
1808          *
1809          * This function does the same like the function above - but for comments
1810          *
1811          * @param integer $itemid Item ID that should be added
1812          * @throws \Exception
1813          */
1814         private static function addShadowPost(int $itemid)
1815         {
1816                 $item = Post::selectFirst(array_merge(self::ITEM_FIELDLIST, ['protocol']), ['id' => $itemid]);
1817                 if (!DBA::isResult($item)) {
1818                         return;
1819                 }
1820
1821                 // Is it a toplevel post?
1822                 if ($item['gravity'] == self::GRAVITY_PARENT) {
1823                         self::addShadow($itemid);
1824                         return;
1825                 }
1826
1827                 // Is this a shadow entry?
1828                 if ($item['uid'] == 0) {
1829                         return;
1830                 }
1831
1832                 // Is there a shadow parent?
1833                 if (!Post::exists(['uri-id' => $item['parent-uri-id'], 'uid' => 0])) {
1834                         return;
1835                 }
1836
1837                 // Is there already a shadow entry?
1838                 if (Post::exists(['uri-id' => $item['uri-id'], 'uid' => 0])) {
1839                         return;
1840                 }
1841
1842                 // Save "origin" and "parent" state
1843                 $origin = $item['origin'];
1844                 $parent = $item['parent'];
1845
1846                 // Preparing public shadow (removing user specific data)
1847                 $item['uid'] = 0;
1848                 unset($item['id']);
1849                 unset($item['parent']);
1850                 unset($item['wall']);
1851                 unset($item['mention']);
1852                 unset($item['origin']);
1853                 unset($item['starred']);
1854                 unset($item['postopts']);
1855                 unset($item['inform']);
1856                 unset($item['post-reason']);
1857                 $item['contact-id'] = Contact::getIdForURL($item['author-link']);
1858
1859                 $public_shadow = self::insert($item);
1860
1861                 Logger::info('Stored public shadow', ['uri-id' => $item['uri-id'], 'id' => $public_shadow]);
1862
1863                 // If this was a comment to a Diaspora post we don't get our comment back.
1864                 // This means that we have to distribute the comment by ourselves.
1865                 if ($origin && Post::exists(['id' => $parent, 'network' => Protocol::DIASPORA])) {
1866                         self::distribute($public_shadow);
1867                 }
1868         }
1869
1870         /**
1871          * Adds a language specification in a "language" element of given $arr.
1872          * Expects "body" element to exist in $arr.
1873          *
1874          * @param array $item
1875          * @return string detected language
1876          * @throws \Text_LanguageDetect_Exception
1877          */
1878         private static function getLanguage(array $item): string
1879         {
1880                 if (!empty($item['language'])) {
1881                         return $item['language'];
1882                 }
1883
1884                 if (!in_array($item['gravity'], [self::GRAVITY_PARENT, self::GRAVITY_COMMENT]) || empty($item['body'])) {
1885                         return '';
1886                 }
1887
1888                 $languages = self::getLanguageArray(trim($item['title'] . "\n" . $item['body']), 3);
1889                 if (empty($languages)) {
1890                         return '';
1891                 }
1892
1893                 return json_encode($languages);
1894         }
1895
1896         /**
1897          * Get a language array from a given text
1898          *
1899          * @param string  $body
1900          * @param integer $count
1901          * @return array
1902          */
1903         public static function getLanguageArray(string $body, int $count): array
1904         {
1905                 // Convert attachments to links
1906                 $naked_body = BBCode::removeAttachment($body);
1907                 if (empty($naked_body)) {
1908                         return [];
1909                 }
1910
1911                 // Remove links and pictures
1912                 $naked_body = BBCode::removeLinks($naked_body);
1913
1914                 // Convert the title and the body to plain text
1915                 $naked_body = BBCode::toPlaintext($naked_body);
1916
1917                 // Remove possibly remaining links
1918                 $naked_body = preg_replace(Strings::autoLinkRegEx(), '', $naked_body);
1919
1920                 if (empty($naked_body)) {
1921                         return [];
1922                 }
1923
1924                 $naked_body = self::getDominantLanguage($naked_body);
1925
1926                 $availableLanguages = DI::l10n()->getAvailableLanguages();
1927                 // See https://github.com/friendica/friendica/issues/10511
1928                 // Persian is manually added to language detection until a persian translation is provided for the interface, at
1929                 // which point it will be automatically available through `getAvailableLanguages()` and this should be removed.
1930                 $availableLanguages['fa'] = 'fa';
1931
1932                 $ld = new Language(array_keys($availableLanguages));
1933                 return $ld->detect($naked_body)->limit(0, $count)->close() ?: [];
1934         }
1935
1936         /**
1937          * Check if latin or non latin are dominant in the body and only return the dominant one
1938          *
1939          * @param string $body
1940          * @return string
1941          */
1942         private static function getDominantLanguage(string $body): string
1943         {
1944                 $latin = '';
1945                 $non_latin = '';
1946                 for ($i = 0; $i < mb_strlen($body); $i++) {
1947                         $character = mb_substr($body, $i, 1);
1948                         $ord = mb_ord($character);
1949
1950                         // We add the most common characters to both strings.
1951                         if (($ord <= 64) || ($ord >= 91 && $ord <= 96) || ($ord >= 123 && $ord <= 191) || in_array($ord, [215, 247]) || ($ord >= 697 && $ord <= 735) || ($ord > 65535)) {
1952                                 $latin .= $character;
1953                                 $non_latin .= $character;
1954                         } elseif ($ord < 768) {
1955                                 $latin .= $character;
1956                         } else {
1957                                 $non_latin .= $character;
1958                         }
1959                 }
1960                 return (mb_strlen($latin) > mb_strlen($non_latin)) ? $latin : $non_latin;
1961         }
1962
1963         public static function getLanguageMessage(array $item): string
1964         {
1965                 $iso639 = new \Matriphe\ISO639\ISO639;
1966
1967                 $used_languages = '';
1968                 foreach (json_decode($item['language'], true) as $language => $reliability) {
1969                         $used_languages .= $iso639->languageByCode1($language) . ' (' . $language . "): " . number_format($reliability, 5) . '\n';
1970                 }
1971                 $used_languages = DI::l10n()->t('Detected languages in this post:\n%s', $used_languages);
1972                 return $used_languages;
1973         }
1974
1975         /**
1976          * Creates an unique guid out of a given uri.
1977          * This function is used for messages outside the fediverse (Connector posts, feeds, Mails, ...)
1978          * Posts that are created on this system are using System::createUUID.
1979          * Received ActivityPub posts are using Processor::getGUIDByURL.
1980          *
1981          * @param string      $uri uri of an item entry
1982          * @param string|null $host hostname for the GUID prefix
1983          * @return string Unique guid
1984          */
1985         public static function guidFromUri(string $uri, string $host = null): string
1986         {
1987                 // Our regular guid routine is using this kind of prefix as well
1988                 // We have to avoid that different routines could accidentally create the same value
1989                 $parsed = parse_url($uri);
1990
1991                 // Remove the scheme to make sure that "https" and "http" doesn't make a difference
1992                 unset($parsed['scheme']);
1993
1994                 // Glue it together to be able to make a hash from it
1995                 $host_id = implode('/', $parsed);
1996
1997                 // Use a mixture of several hashes to provide some GUID like experience
1998                 return hash('crc32', $host) . '-'. hash('joaat', $host_id) . '-'. hash('fnv164', $host_id);
1999         }
2000
2001         /**
2002          * generate an unique URI
2003          *
2004          * @param string $guid An existing GUID (Otherwise it will be generated)
2005          *
2006          * @return string
2007          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
2008          */
2009         public static function newURI(string $guid = ''): string
2010         {
2011                 if ($guid == '') {
2012                         $guid = System::createUUID();
2013                 }
2014
2015                 return DI::baseUrl()->get() . '/objects/' . $guid;
2016         }
2017
2018         /**
2019          * Set "success_update" and "last-item" to the date of the last time we heard from this contact
2020          *
2021          * This can be used to filter for inactive contacts.
2022          * Only do this for public postings to avoid privacy problems, since poco data is public.
2023          * Don't set this value if it isn't from the owner (could be an author that we don't know)
2024          *
2025          * @param array $arr Contains the just posted item record
2026          * @throws \Exception
2027          */
2028         private static function updateContact(array $arr)
2029         {
2030                 // Unarchive the author
2031                 $contact = DBA::selectFirst('contact', [], ['id' => $arr["author-id"]]);
2032                 if (DBA::isResult($contact)) {
2033                         Contact::unmarkForArchival($contact);
2034                 }
2035
2036                 // Unarchive the contact if it's not our own contact
2037                 $contact = DBA::selectFirst('contact', [], ['id' => $arr["contact-id"], 'self' => false]);
2038                 if (DBA::isResult($contact)) {
2039                         Contact::unmarkForArchival($contact);
2040                 }
2041
2042                 /// @todo On private posts we could obfuscate the date
2043                 $update = ($arr['private'] != self::PRIVATE) || in_array($arr['network'], Protocol::FEDERATED);
2044
2045                 // Is it a forum? Then we don't care about the rules from above
2046                 if (!$update && in_array($arr["network"], [Protocol::ACTIVITYPUB, Protocol::DFRN]) && ($arr["parent-uri-id"] === $arr["uri-id"])) {
2047                         if (DBA::exists('contact', ['id' => $arr['contact-id'], 'forum' => true])) {
2048                                 $update = true;
2049                         }
2050                 }
2051
2052                 if ($update) {
2053                         // The "self" contact id is used (for example in the connectors) when the contact is unknown
2054                         // So we have to ensure to only update the last item when it had been our own post,
2055                         // or it had been done by a "regular" contact.
2056                         if (!empty($arr['wall'])) {
2057                                 $condition = ['id' => $arr['contact-id']];
2058                         } else {
2059                                 $condition = ['id' => $arr['contact-id'], 'self' => false];
2060                         }
2061                         Contact::update(['failed' => false, 'local-data' => true, 'success_update' => $arr['received'], 'last-item' => $arr['received']], $condition);
2062                 }
2063                 // Now do the same for the system wide contacts with uid=0
2064                 if ($arr['private'] != self::PRIVATE) {
2065                         Contact::update(['failed' => false, 'local-data' => true, 'success_update' => $arr['received'], 'last-item' => $arr['received']],
2066                                 ['id' => $arr['owner-id']]);
2067
2068                         if ($arr['owner-id'] != $arr['author-id']) {
2069                                 Contact::update(['failed' => false, 'local-data' => true, 'success_update' => $arr['received'], 'last-item' => $arr['received']],
2070                                         ['id' => $arr['author-id']]);
2071                         }
2072                 }
2073         }
2074
2075         public static function setHashtags(string $body): string
2076         {
2077                 $body = BBCode::performWithEscapedTags($body, ['noparse', 'pre', 'code', 'img'], function ($body) {
2078                         $tags = BBCode::getTags($body);
2079
2080                         // No hashtags?
2081                         if (!count($tags)) {
2082                                 return $body;
2083                         }
2084
2085                         // This sorting is important when there are hashtags that are part of other hashtags
2086                         // Otherwise there could be problems with hashtags like #test and #test2
2087                         // Because of this we are sorting from the longest to the shortest tag.
2088                         usort($tags, function ($a, $b) {
2089                                 return strlen($b) <=> strlen($a);
2090                         });
2091
2092                         $URLSearchString = "^\[\]";
2093
2094                         // All hashtags should point to the home server if "local_tags" is activated
2095                         if (DI::config()->get('system', 'local_tags')) {
2096                                 $body = preg_replace("/#\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",
2097                                         "#[url=" . DI::baseUrl() . "/search?tag=$2]$2[/url]", $body);
2098                         }
2099
2100                         // mask hashtags inside of url, bookmarks and attachments to avoid urls in urls
2101                         $body = preg_replace_callback("/\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",
2102                                 function ($match) {
2103                                         return ("[url=" . str_replace("#", "&num;", $match[1]) . "]" . str_replace("#", "&num;", $match[2]) . "[/url]");
2104                                 }, $body);
2105
2106                         $body = preg_replace_callback("/\[bookmark\=([$URLSearchString]*)\](.*?)\[\/bookmark\]/ism",
2107                                 function ($match) {
2108                                         return ("[bookmark=" . str_replace("#", "&num;", $match[1]) . "]" . str_replace("#", "&num;", $match[2]) . "[/bookmark]");
2109                                 }, $body);
2110
2111                         $body = preg_replace_callback("/\[attachment (.*?)\](.*?)\[\/attachment\]/ism",
2112                                 function ($match) {
2113                                         return ("[attachment " . str_replace("#", "&num;", $match[1]) . "]" . $match[2] . "[/attachment]");
2114                                 }, $body);
2115
2116                         // Repair recursive urls
2117                         $body = preg_replace("/&num;\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",
2118                                 "&num;$2", $body);
2119
2120                         foreach ($tags as $tag) {
2121                                 if ((strpos($tag, '#') !== 0) || strpos($tag, '[url=') || strlen($tag) < 2 || $tag[1] == '#') {
2122                                         continue;
2123                                 }
2124
2125                                 $basetag = str_replace('_', ' ', substr($tag, 1));
2126                                 $newtag = '#[url=' . DI::baseUrl() . '/search?tag=' . $basetag . ']' . $basetag . '[/url]';
2127
2128                                 $body = str_replace($tag, $newtag, $body);
2129                         }
2130
2131                         // Convert back the masked hashtags
2132                         $body = str_replace("&num;", "#", $body);
2133
2134                         return $body;
2135                 });
2136
2137                 return $body;
2138         }
2139
2140         /**
2141          * look for mention tags and setup a second delivery chain for forum/community posts if appropriate
2142          *
2143          * @param int $uid
2144          * @param int $item_id
2145          * @return boolean true if item was deleted, else false
2146          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
2147          * @throws \ImagickException
2148          */
2149         private static function tagDeliver(int $uid, int $item_id): bool
2150         {
2151                 $mention = false;
2152
2153                 $owner = User::getOwnerDataById($uid);
2154                 if (!DBA::isResult($owner)) {
2155                         Logger::warning('User not found, quitting here.', ['uid' => $uid]);
2156                         return false;
2157                 }
2158
2159                 if ($owner['contact-type'] != User::ACCOUNT_TYPE_COMMUNITY) {
2160                         Logger::debug('Owner is no community, quitting here.', ['uid' => $uid, 'id' => $item_id]);
2161                         return false;
2162                 }
2163
2164                 $item = Post::selectFirst(self::ITEM_FIELDLIST, ['id' => $item_id, 'gravity' => [self::GRAVITY_PARENT, self::GRAVITY_COMMENT], 'origin' => false]);
2165                 if (!DBA::isResult($item)) {
2166                         Logger::debug('Post is an activity or origin or not found at all, quitting here.', ['id' => $item_id]);
2167                         return false;
2168                 }
2169
2170                 if ($item['gravity'] == self::GRAVITY_PARENT) {
2171                         if (Tag::isMentioned($item['uri-id'], $owner['url'])) {
2172                                 Logger::info('Mention found in tag.', ['uri' => $item['uri'], 'uid' => $uid, 'id' => $item_id, 'uri-id' => $item['uri-id'], 'guid' => $item['guid']]);
2173                         } else {
2174                                 Logger::info('Top-level post without mention is deleted.', ['uri' => $item['uri'], $uid, 'id' => $item_id, 'uri-id' => $item['uri-id'], 'guid' => $item['guid']]);
2175                                 Post\User::delete(['uri-id' => $item['uri-id'], 'uid' => $item['uid']]);
2176                                 return true;
2177                         }
2178
2179                         $arr = ['item' => $item, 'user' => $owner];
2180
2181                         Hook::callAll('tagged', $arr);
2182                 } else {
2183                         if (Tag::isMentioned($item['parent-uri-id'], $owner['url'])) {
2184                                 Logger::info('Mention found in parent tag.', ['uri' => $item['uri'], 'uid' => $uid, 'id' => $item_id, 'uri-id' => $item['uri-id'], 'guid' => $item['guid']]);
2185                         } else {
2186                                 Logger::debug('No mentions found in parent, quitting here.', ['id' => $item_id, 'uri-id' => $item['uri-id'], 'guid' => $item['guid']]);
2187                                 return false;
2188                         }
2189                 }
2190
2191                 Logger::info('Community post will be distributed', ['uri' => $item['uri'], 'uid' => $uid, 'id' => $item_id, 'uri-id' => $item['uri-id'], 'guid' => $item['guid']]);
2192
2193                 if ($owner['page-flags'] == User::PAGE_FLAGS_PRVGROUP) {
2194                         $allow_cid = '';
2195                         $allow_gid = '<' . Group::FOLLOWERS . '>';
2196                         $deny_cid  = '';
2197                         $deny_gid  = '';
2198                         self::performActivity($item['id'], 'announce', $uid, $allow_cid, $allow_gid, $deny_cid, $deny_gid);
2199                 } else {
2200                         self::performActivity($item['id'], 'announce', $uid);
2201                 }
2202
2203                 Logger::info('Community post had been distributed', ['uri' => $item['uri'], 'uid' => $uid, 'id' => $item_id, 'uri-id' => $item['uri-id'], 'guid' => $item['guid']]);
2204                 return false;
2205         }
2206
2207         /**
2208          * Automatically reshare the item if the "remote_self" option is selected
2209          *
2210          * @param array $item
2211          * @return void
2212          */
2213         private static function autoReshare(array $item)
2214         {
2215                 if ($item['gravity'] != self::GRAVITY_PARENT) {
2216                         return;
2217                 }
2218
2219                 if (!DBA::exists('contact', ['id' => $item['contact-id'], 'remote_self' => Contact::MIRROR_NATIVE_RESHARE])) {
2220                         return;
2221                 }
2222
2223                 if (!in_array($item['network'], [Protocol::ACTIVITYPUB, Protocol::DFRN])) {
2224                         return;
2225                 }
2226
2227                 Logger::info('Automatically reshare item', ['uid' => $item['uid'], 'id' => $item['id'], 'guid' => $item['guid'], 'uri-id' => $item['uri-id']]);
2228
2229                 self::performActivity($item['id'], 'announce', $item['uid']);
2230         }
2231
2232         public static function isRemoteSelf(array $contact, array &$datarray): bool
2233         {
2234                 if (!$contact['remote_self']) {
2235                         return false;
2236                 }
2237
2238                 // Prevent the forwarding of posts that are forwarded
2239                 if (!empty($datarray["extid"]) && ($datarray["extid"] == Protocol::DFRN)) {
2240                         Logger::info('Already forwarded');
2241                         return false;
2242                 }
2243
2244                 // Prevent to forward already forwarded posts
2245                 if ($datarray["app"] == DI::baseUrl()->getHostname()) {
2246                         Logger::info('Already forwarded (second test)');
2247                         return false;
2248                 }
2249
2250                 // Only forward posts
2251                 if ($datarray["verb"] != Activity::POST) {
2252                         Logger::info('No post');
2253                         return false;
2254                 }
2255
2256                 if (($contact['network'] != Protocol::FEED) && ($datarray['private'] == self::PRIVATE)) {
2257                         Logger::info('Not public');
2258                         return false;
2259                 }
2260
2261                 $datarray2 = $datarray;
2262                 Logger::info('remote-self start', ['contact' => $contact['url'], 'remote_self'=> $contact['remote_self'], 'item' => $datarray]);
2263                 if ($contact['remote_self'] == Contact::MIRROR_OWN_POST) {
2264                         $self = DBA::selectFirst('contact', ['id', 'name', 'url', 'thumb'],
2265                                         ['uid' => $contact['uid'], 'self' => true]);
2266                         if (DBA::isResult($self)) {
2267                                 $datarray['contact-id'] = $self["id"];
2268
2269                                 $datarray['owner-name'] = $self["name"];
2270                                 $datarray['owner-link'] = $self["url"];
2271                                 $datarray['owner-avatar'] = $self["thumb"];
2272
2273                                 $datarray['author-name']   = $datarray['owner-name'];
2274                                 $datarray['author-link']   = $datarray['owner-link'];
2275                                 $datarray['author-avatar'] = $datarray['owner-avatar'];
2276
2277                                 unset($datarray['edited']);
2278
2279                                 unset($datarray['network']);
2280                                 unset($datarray['owner-id']);
2281                                 unset($datarray['author-id']);
2282                         }
2283
2284                         if ($contact['network'] != Protocol::FEED) {
2285                                 $old_uri_id = $datarray["uri-id"] ?? 0;
2286                                 $datarray["guid"] = System::createUUID();
2287                                 unset($datarray["plink"]);
2288                                 $datarray["uri"] = self::newURI($datarray["guid"]);
2289                                 $datarray["uri-id"] = ItemURI::getIdByURI($datarray["uri"]);
2290                                 $datarray["extid"] = Protocol::DFRN;
2291                                 $urlpart = parse_url($datarray2['author-link']);
2292                                 $datarray["app"] = $urlpart["host"];
2293                                 if (!empty($old_uri_id)) {
2294                                         Post\Media::copy($old_uri_id, $datarray["uri-id"]);
2295                                 }
2296
2297                                 unset($datarray["parent-uri"]);
2298                                 unset($datarray["thr-parent"]);
2299                         } else {
2300                                 $datarray['private'] = self::PUBLIC;
2301                         }
2302                 }
2303
2304                 if ($contact['network'] != Protocol::FEED) {
2305                         // Store the original post
2306                         $result = self::insert($datarray2);
2307                         Logger::info('remote-self post original item', ['contact' => $contact['url'], 'result'=> $result, 'item' => $datarray2]);
2308                 } else {
2309                         $datarray["app"] = "Feed";
2310                         $result = true;
2311                 }
2312
2313                 return (bool)$result;
2314         }
2315
2316         /**
2317          *
2318          * @param string $s
2319          * @param int    $uid
2320          * @param array  $item
2321          * @param int    $cid
2322          * @return string
2323          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
2324          * @throws \ImagickException
2325          */
2326         public static function fixPrivatePhotos(string $s, int $uid, array $item = null, int $cid = 0): string
2327         {
2328                 if (DI::config()->get('system', 'disable_embedded')) {
2329                         return $s;
2330                 }
2331
2332                 Logger::info('check for photos');
2333                 $site = substr(DI::baseUrl(), strpos(DI::baseUrl(), '://'));
2334
2335                 $orig_body = $s;
2336                 $new_body = '';
2337
2338                 $img_start = strpos($orig_body, '[img');
2339                 $img_st_close = ($img_start !== false ? strpos(substr($orig_body, $img_start), ']') : false);
2340                 $img_len = ($img_start !== false ? strpos(substr($orig_body, $img_start + $img_st_close + 1), '[/img]') : false);
2341
2342                 while (($img_st_close !== false) && ($img_len !== false)) {
2343                         $img_st_close++; // make it point to AFTER the closing bracket
2344                         $image = substr($orig_body, $img_start + $img_st_close, $img_len);
2345
2346                         Logger::info('found photo', ['image' => $image]);
2347
2348                         if (stristr($image, $site . '/photo/')) {
2349                                 // Only embed locally hosted photos
2350                                 $replace = false;
2351                                 $i = basename($image);
2352                                 $i = str_replace(['.jpg', '.png', '.gif'], ['', '', ''], $i);
2353                                 $x = strpos($i, '-');
2354
2355                                 if ($x) {
2356                                         $res = substr($i, $x + 1);
2357                                         $i = substr($i, 0, $x);
2358                                         $photo = Photo::getPhotoForUser($uid, $i, $res);
2359                                         if (DBA::isResult($photo)) {
2360                                                 /*
2361                                                  * Check to see if we should replace this photo link with an embedded image
2362                                                  * 1. No need to do so if the photo is public
2363                                                  * 2. If there's a contact-id provided, see if they're in the access list
2364                                                  *    for the photo. If so, embed it.
2365                                                  * 3. Otherwise, if we have an item, see if the item permissions match the photo
2366                                                  *    permissions, regardless of order but first check to see if they're an exact
2367                                                  *    match to save some processing overhead.
2368                                                  */
2369                                                 if (self::hasPermissions($photo)) {
2370                                                         if ($cid) {
2371                                                                 $recips = self::enumeratePermissions($photo);
2372                                                                 if (in_array($cid, $recips)) {
2373                                                                         $replace = true;
2374                                                                 }
2375                                                         } elseif ($item) {
2376                                                                 if (self::samePermissions($uid, $item, $photo)) {
2377                                                                         $replace = true;
2378                                                                 }
2379                                                         }
2380                                                 }
2381                                                 if ($replace) {
2382                                                         $photo_img = Photo::getImageForPhoto($photo);
2383                                                         // If a custom width and height were specified, apply before embedding
2384                                                         if (preg_match("/\[img\=([0-9]*)x([0-9]*)\]/is", substr($orig_body, $img_start, $img_st_close), $match)) {
2385                                                                 Logger::info('scaling photo');
2386
2387                                                                 $width = intval($match[1]);
2388                                                                 $height = intval($match[2]);
2389
2390                                                                 $photo_img->scaleDown(max($width, $height));
2391                                                         }
2392
2393                                                         $data = $photo_img->asString();
2394                                                         $type = $photo_img->getType();
2395
2396                                                         Logger::info('replacing photo');
2397                                                         $image = 'data:' . $type . ';base64,' . base64_encode($data);
2398                                                         Logger::debug('replaced', ['image' => $image]);
2399                                                 }
2400                                         }
2401                                 }
2402                         }
2403
2404                         $new_body = $new_body . substr($orig_body, 0, $img_start + $img_st_close) . $image . '[/img]';
2405                         $orig_body = substr($orig_body, $img_start + $img_st_close + $img_len + strlen('[/img]'));
2406                         if ($orig_body === false) {
2407                                 $orig_body = '';
2408                         }
2409
2410                         $img_start = strpos($orig_body, '[img');
2411                         $img_st_close = ($img_start !== false ? strpos(substr($orig_body, $img_start), ']') : false);
2412                         $img_len = ($img_start !== false ? strpos(substr($orig_body, $img_start + $img_st_close + 1), '[/img]') : false);
2413                 }
2414
2415                 $new_body = $new_body . $orig_body;
2416
2417                 return $new_body;
2418         }
2419
2420         private static function hasPermissions(array $obj)
2421         {
2422                 return !empty($obj['allow_cid']) || !empty($obj['allow_gid']) ||
2423                         !empty($obj['deny_cid']) || !empty($obj['deny_gid']);
2424         }
2425
2426         // @TODO $uid is unused parameter
2427         private static function samePermissions($uid, array $obj1, array $obj2): bool
2428         {
2429                 // first part is easy. Check that these are exactly the same.
2430                 if (($obj1['allow_cid'] == $obj2['allow_cid'])
2431                         && ($obj1['allow_gid'] == $obj2['allow_gid'])
2432                         && ($obj1['deny_cid'] == $obj2['deny_cid'])
2433                         && ($obj1['deny_gid'] == $obj2['deny_gid'])) {
2434                         return true;
2435                 }
2436
2437                 // This is harder. Parse all the permissions and compare the resulting set.
2438                 $recipients1 = self::enumeratePermissions($obj1);
2439                 $recipients2 = self::enumeratePermissions($obj2);
2440                 sort($recipients1);
2441                 sort($recipients2);
2442
2443                 /// @TODO Comparison of arrays, maybe use array_diff_assoc() here?
2444                 return ($recipients1 == $recipients2);
2445         }
2446
2447         /**
2448          * Returns an array of contact-ids that are allowed to see this object
2449          *
2450          * @param array $obj        Item array with at least uid, allow_cid, allow_gid, deny_cid and deny_gid
2451          * @param bool  $check_dead Prunes unavailable contacts from the result
2452          * @return array
2453          * @throws \Exception
2454          */
2455         public static function enumeratePermissions(array $obj, bool $check_dead = false): array
2456         {
2457                 $aclFormater = DI::aclFormatter();
2458
2459                 $allow_people = $aclFormater->expand($obj['allow_cid']);
2460                 $allow_groups = Group::expand($obj['uid'], $aclFormater->expand($obj['allow_gid']), $check_dead);
2461                 $deny_people  = $aclFormater->expand($obj['deny_cid']);
2462                 $deny_groups  = Group::expand($obj['uid'], $aclFormater->expand($obj['deny_gid']), $check_dead);
2463                 $recipients   = array_unique(array_merge($allow_people, $allow_groups));
2464                 $deny         = array_unique(array_merge($deny_people, $deny_groups));
2465                 $recipients   = array_diff($recipients, $deny);
2466                 return $recipients;
2467         }
2468
2469         public static function expire(int $uid, int $days, string $network = "", bool $force = false)
2470         {
2471                 if (!$uid || ($days < 1)) {
2472                         return;
2473                 }
2474
2475                 $condition = ["`uid` = ? AND NOT `deleted` AND `gravity` = ?",
2476                         $uid, self::GRAVITY_PARENT];
2477
2478                 /*
2479                  * $expire_network_only = save your own wall posts
2480                  * and just expire conversations started by others
2481                  */
2482                 $expire_network_only = DI::pConfig()->get($uid, 'expire', 'network_only', false);
2483
2484                 if ($expire_network_only) {
2485                         $condition[0] .= " AND NOT `wall`";
2486                 }
2487
2488                 if ($network != "") {
2489                         $condition[0] .= " AND `network` = ?";
2490                         $condition[] = $network;
2491                 }
2492
2493                 $condition[0] .= " AND `received` < ?";
2494                 $condition[] = DateTimeFormat::utc('now - ' . $days . ' day');
2495
2496                 $items = Post::select(['resource-id', 'starred', 'id', 'post-type', 'uid', 'uri-id'], $condition);
2497
2498                 if (!DBA::isResult($items)) {
2499                         return;
2500                 }
2501
2502                 $expire_items = (bool)DI::pConfig()->get($uid, 'expire', 'items', true);
2503
2504                 // Forcing expiring of items - but not notes and marked items
2505                 if ($force) {
2506                         $expire_items = true;
2507                 }
2508
2509                 $expire_notes = (bool)DI::pConfig()->get($uid, 'expire', 'notes', true);
2510                 $expire_starred = (bool)DI::pConfig()->get($uid, 'expire', 'starred', true);
2511                 $expire_photos = (bool)DI::pConfig()->get($uid, 'expire', 'photos', false);
2512
2513                 $expired = 0;
2514
2515                 $priority = DI::config()->get('system', 'expire-notify-priority');
2516
2517                 while ($item = Post::fetch($items)) {
2518                         // don't expire filed items
2519                         if (DBA::exists('post-category', ['uri-id' => $item['uri-id'], 'uid' => $item['uid'], 'type' => Post\Category::FILE])) {
2520                                 continue;
2521                         }
2522
2523                         // Only expire posts, not photos and photo comments
2524
2525                         if (!$expire_photos && !empty($item['resource-id'])) {
2526                                 continue;
2527                         } elseif (!$expire_starred && intval($item['starred'])) {
2528                                 continue;
2529                         } elseif (!$expire_notes && ($item['post-type'] == self::PT_PERSONAL_NOTE)) {
2530                                 continue;
2531                         } elseif (!$expire_items && ($item['post-type'] != self::PT_PERSONAL_NOTE)) {
2532                                 continue;
2533                         }
2534
2535                         self::markForDeletionById($item['id'], $priority);
2536
2537                         ++$expired;
2538                 }
2539                 DBA::close($items);
2540                 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]);
2541         }
2542
2543         public static function firstPostDate(int $uid, bool $wall = false)
2544         {
2545                 $user = User::getById($uid, ['register_date']);
2546                 if (empty($user)) {
2547                         return false;
2548                 }
2549
2550                 $condition = ["`uid` = ? AND `wall` = ? AND NOT `deleted` AND `visible` AND `received` >= ?",
2551                         $uid, $wall, $user['register_date']];
2552                 $params = ['order' => ['received' => false]];
2553                 $thread = Post::selectFirstThread(['received'], $condition, $params);
2554                 if (DBA::isResult($thread)) {
2555                         $postdate = substr(DateTimeFormat::local($thread['received']), 0, 10);
2556                         return $postdate;
2557                 }
2558                 return false;
2559         }
2560
2561         /**
2562          * add/remove activity to an item
2563          *
2564          * Toggle activities as like,dislike,attend of an item
2565          *
2566          * @param int    $item_id
2567          * @param string $verb
2568          *            Activity verb. One of
2569          *            like, unlike, dislike, undislike, attendyes, unattendyes,
2570          *            attendno, unattendno, attendmaybe, unattendmaybe,
2571          *            announce, unannouce
2572          * @param int    $uid
2573          * @param string $allow_cid
2574          * @param string $allow_gid
2575          * @param string $deny_cid
2576          * @param string $deny_gid
2577          * @return bool
2578          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
2579          * @throws \ImagickException
2580          * @hook  'post_local_end'
2581          *            array $arr
2582          *            'post_id' => ID of posted item
2583          */
2584         public static function performActivity(int $item_id, string $verb, int $uid, string $allow_cid = null, string $allow_gid = null, string $deny_cid = null, string $deny_gid = null): bool
2585         {
2586                 if (empty($uid)) {
2587                         return false;
2588                 }
2589
2590                 Logger::notice('Start create activity', ['verb' => $verb, 'item' => $item_id, 'user' => $uid]);
2591
2592                 $item = Post::selectFirst(self::ITEM_FIELDLIST, ['id' => $item_id]);
2593                 if (!DBA::isResult($item)) {
2594                         Logger::warning('Post had not been fetched', ['id' => $item_id]);
2595                         return false;
2596                 }
2597
2598                 $uri_id = $item['uri-id'];
2599
2600                 if (!in_array($item['uid'], [0, $uid])) {
2601                         return false;
2602                 }
2603
2604                 if (!Post::exists(['uri-id' => $item['parent-uri-id'], 'uid' => $uid])) {
2605                         $stored = self::storeForUserByUriId($item['parent-uri-id'], $uid, ['post-reason' => Item::PR_ACTIVITY]);
2606                         if (($item['parent-uri-id'] == $item['uri-id']) && !empty($stored)) {
2607                                 $item = Post::selectFirst(self::ITEM_FIELDLIST, ['id' => $stored]);
2608                                 if (!DBA::isResult($item)) {
2609                                         Logger::info('Could not fetch just created item - should not happen', ['stored' => $stored, 'uid' => $uid, 'uri-id' => $uri_id]);
2610                                         return false;
2611                                 }
2612                         }
2613                 }
2614
2615                 // Retrieves the local post owner
2616                 $owner = User::getOwnerDataById($uid);
2617                 if (empty($owner)) {
2618                         Logger::info('Empty owner for user', ['uid' => $uid]);
2619                         return false;
2620                 }
2621
2622                 // Retrieve the current logged in user's public contact
2623                 $author_id = Contact::getPublicIdByUserId($uid);
2624                 if (empty($author_id)) {
2625                         Logger::info('Empty public contact');
2626                         return false;
2627                 }
2628
2629                 $activity = null;
2630                 switch ($verb) {
2631                         case 'like':
2632                         case 'unlike':
2633                                 $activity = Activity::LIKE;
2634                                 break;
2635                         case 'dislike':
2636                         case 'undislike':
2637                                 $activity = Activity::DISLIKE;
2638                                 break;
2639                         case 'attendyes':
2640                         case 'unattendyes':
2641                                 $activity = Activity::ATTEND;
2642                                 break;
2643                         case 'attendno':
2644                         case 'unattendno':
2645                                 $activity = Activity::ATTENDNO;
2646                                 break;
2647                         case 'attendmaybe':
2648                         case 'unattendmaybe':
2649                                 $activity = Activity::ATTENDMAYBE;
2650                                 break;
2651                         case 'follow':
2652                         case 'unfollow':
2653                                 $activity = Activity::FOLLOW;
2654                                 break;
2655                         case 'announce':
2656                         case 'unannounce':
2657                                 $activity = Activity::ANNOUNCE;
2658                                 break;
2659                         default:
2660                                 Logger::warning('unknown verb', ['verb' => $verb, 'item' => $item_id]);
2661                                 return false;
2662                 }
2663
2664                 $mode = Strings::startsWith($verb, 'un') ? 'delete' : 'create';
2665
2666                 // Enable activity toggling instead of on/off
2667                 $event_verb_flag = $activity === Activity::ATTEND || $activity === Activity::ATTENDNO || $activity === Activity::ATTENDMAYBE;
2668
2669                 // Look for an existing verb row
2670                 // Event participation activities are mutually exclusive, only one of them can exist at all times.
2671                 if ($event_verb_flag) {
2672                         $verbs = [Activity::ATTEND, Activity::ATTENDNO, Activity::ATTENDMAYBE];
2673
2674                         // Translate to the index based activity index
2675                         $vids = [];
2676                         foreach ($verbs as $verb) {
2677                                 $vids[] = Verb::getID($verb);
2678                         }
2679                 } else {
2680                         $vids = Verb::getID($activity);
2681                 }
2682
2683                 $condition = ['vid' => $vids, 'deleted' => false, 'gravity' => self::GRAVITY_ACTIVITY,
2684                         'author-id' => $author_id, 'uid' => $item['uid'], 'thr-parent-id' => $uri_id];
2685                 $like_item = Post::selectFirst(['id', 'guid', 'verb'], $condition);
2686
2687                 if (DBA::isResult($like_item)) {
2688                         /**
2689                          * Truth table for existing activities
2690                          *
2691                          * |          Inputs            ||      Outputs      |
2692                          * |----------------------------||-------------------|
2693                          * |  Mode  | Event | Same verb || Delete? | Return? |
2694                          * |--------|-------|-----------||---------|---------|
2695                          * | create |  Yes  |    Yes    ||   No    |   Yes   |
2696                          * | create |  Yes  |    No     ||   Yes   |   No    |
2697                          * | create |  No   |    Yes    ||   No    |   Yes   |
2698                          * | create |  No   |    No     ||        N/A†       |
2699                          * | delete |  Yes  |    Yes    ||   Yes   |   N/A‡  |
2700                          * | delete |  Yes  |    No     ||   No    |   N/A‡  |
2701                          * | delete |  No   |    Yes    ||   Yes   |   N/A‡  |
2702                          * | delete |  No   |    No     ||        N/A†       |
2703                          * |--------|-------|-----------||---------|---------|
2704                          * |   A    |   B   |     C     || A xor C | !B or C |
2705                          *
2706                          * † Can't happen: It's impossible to find an existing non-event activity without
2707                          *                 the same verb because we are only looking for this single verb.
2708                          *
2709                          * ‡ The "mode = delete" is returning early whether an existing activity was found or not.
2710                          */
2711                         if ($mode == 'create' xor $like_item['verb'] == $activity) {
2712                                 self::markForDeletionById($like_item['id']);
2713                         }
2714
2715                         if (!$event_verb_flag || $like_item['verb'] == $activity) {
2716                                 return true;
2717                         }
2718                 }
2719
2720                 // No need to go further if we aren't creating anything
2721                 if ($mode == 'delete') {
2722                         return true;
2723                 }
2724
2725                 $objtype = $item['resource-id'] ? Activity\ObjectType::IMAGE : Activity\ObjectType::NOTE;
2726
2727                 $new_item = [
2728                         'guid'          => System::createUUID(),
2729                         'uri'           => self::newURI(),
2730                         'uid'           => $uid,
2731                         'contact-id'    => $owner['id'],
2732                         'wall'          => $item['wall'],
2733                         'origin'        => 1,
2734                         'network'       => Protocol::DFRN,
2735                         'protocol'      => Conversation::PARCEL_DIRECT,
2736                         'direction'     => Conversation::PUSH,
2737                         'gravity'       => self::GRAVITY_ACTIVITY,
2738                         'parent'        => $item['id'],
2739                         'thr-parent'    => $item['uri'],
2740                         'owner-id'      => $author_id,
2741                         'author-id'     => $author_id,
2742                         'body'          => $activity,
2743                         'verb'          => $activity,
2744                         'object-type'   => $objtype,
2745                         'allow_cid'     => $allow_cid ?? $item['allow_cid'],
2746                         'allow_gid'     => $allow_gid ?? $item['allow_gid'],
2747                         'deny_cid'      => $deny_cid ?? $item['deny_cid'],
2748                         'deny_gid'      => $deny_gid ?? $item['deny_gid'],
2749                         'visible'       => 1,
2750                         'unseen'        => 1,
2751                 ];
2752
2753                 if (in_array($activity, [Activity::LIKE, Activity::DISLIKE])) {
2754                         $signed = Diaspora::createLikeSignature($uid, $new_item);
2755                         if (!empty($signed)) {
2756                                 $new_item['diaspora_signed_text'] = json_encode($signed);
2757                         }
2758                 }
2759
2760                 self::insert($new_item, true);
2761
2762                 // If the parent item isn't visible then set it to visible
2763                 // @todo Check if this is still needed
2764                 if (!$item['visible']) {
2765                         self::update(['visible' => true], ['id' => $item['id']]);
2766                 }
2767                 return true;
2768         }
2769
2770         /**
2771          * Fetch the SQL condition for the given user id
2772          *
2773          * @param integer $owner_id User ID for which the permissions should be fetched
2774          * @return array condition
2775          */
2776         public static function getPermissionsConditionArrayByUserId(int $owner_id): array
2777         {
2778                 $local_user = local_user();
2779                 $remote_user = Session::getRemoteContactID($owner_id);
2780
2781                 // default permissions - anonymous user
2782                 $condition = ["`private` != ?", self::PRIVATE];
2783
2784                 if ($local_user && ($local_user == $owner_id)) {
2785                         // Profile owner - everything is visible
2786                         $condition = [];
2787                 } elseif ($remote_user) {
2788                          // Authenticated visitor - fetch the matching permissionsets
2789                         $permissionSets = DI::permissionSet()->selectByContactId($remote_user, $owner_id);
2790                         if (!empty($set)) {
2791                                 $condition = ["(`private` != ? OR (`private` = ? AND `wall`
2792                                         AND `psid` IN (" . implode(', ', array_fill(0, count($set), '?')) . ")))",
2793                                         self::PRIVATE, self::PRIVATE];
2794                                 $condition = array_merge($condition, $permissionSets->column('id'));
2795                         }
2796                 }
2797
2798                 return $condition;
2799         }
2800
2801         /**
2802          * Get a permission SQL string for the given user
2803          *
2804          * @param int $owner_id
2805          * @param string $table
2806          * @return string
2807          */
2808         public static function getPermissionsSQLByUserId(int $owner_id, string $table = ''): string
2809         {
2810                 $local_user = local_user();
2811                 $remote_user = Session::getRemoteContactID($owner_id);
2812
2813                 if (!empty($table)) {
2814                         $table = DBA::quoteIdentifier($table) . '.';
2815                 }
2816
2817                 /*
2818                  * Construct permissions
2819                  *
2820                  * default permissions - anonymous user
2821                  */
2822                 $sql = sprintf(" AND " . $table . "`private` != %d", self::PRIVATE);
2823
2824                 // Profile owner - everything is visible
2825                 if ($local_user && ($local_user == $owner_id)) {
2826                         $sql = '';
2827                 } elseif ($remote_user) {
2828                         /*
2829                          * Authenticated visitor. Unless pre-verified,
2830                          * check that the contact belongs to this $owner_id
2831                          * and load the groups the visitor belongs to.
2832                          * If pre-verified, the caller is expected to have already
2833                          * done this and passed the groups into this function.
2834                          */
2835                         $permissionSets = DI::permissionSet()->selectByContactId($remote_user, $owner_id);
2836
2837                         if (!empty($set)) {
2838                                 $sql_set = sprintf(" OR (" . $table . "`private` = %d AND " . $table . "`wall` AND " . $table . "`psid` IN (", self::PRIVATE) . implode(',', $permissionSets->column('id')) . "))";
2839                         } else {
2840                                 $sql_set = '';
2841                         }
2842
2843                         $sql = sprintf(" AND (" . $table . "`private` != %d", self::PRIVATE) . $sql_set . ")";
2844                 }
2845
2846                 return $sql;
2847         }
2848
2849         /**
2850          * get translated item type
2851          *
2852          * @param array                $item
2853          * @param \Friendica\Core\L10n $l10n
2854          * @return string
2855          */
2856         public static function postType(array $item, \Friendica\Core\L10n $l10n): string
2857         {
2858                 if (!empty($item['event-id'])) {
2859                         return $l10n->t('event');
2860                 } elseif (!empty($item['resource-id'])) {
2861                         return $l10n->t('photo');
2862                 } elseif ($item['gravity'] == self::GRAVITY_ACTIVITY) {
2863                         return $l10n->t('activity');
2864                 } elseif ($item['gravity'] == self::GRAVITY_COMMENT) {
2865                         return $l10n->t('comment');
2866                 }
2867
2868                 return $l10n->t('post');
2869         }
2870
2871         /**
2872          * Sets the "rendered-html" field of the provided item
2873          *
2874          * Body is preserved to avoid side-effects as we modify it just-in-time for spoilers and private image links
2875          *
2876          * @param array $item
2877          *
2878          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
2879          * @todo Remove reference, simply return "rendered-html" and "rendered-hash"
2880          */
2881         private static function putInCache(&$item)
2882         {
2883                 // Save original body to prevent addons to modify it
2884                 $body = $item['body'];
2885
2886                 $rendered_hash = $item['rendered-hash'] ?? '';
2887                 $rendered_html = $item['rendered-html'] ?? '';
2888
2889                 if ($rendered_hash == ''
2890                         || $rendered_html == ''
2891                         || $rendered_hash != hash('md5', BBCode::VERSION . '::' . $body)
2892                         || DI::config()->get('system', 'ignore_cache')
2893                 ) {
2894                         $item['rendered-html'] = BBCode::convertForUriId($item['uri-id'], $item['body']);
2895                         $item['rendered-hash'] = hash('md5', BBCode::VERSION . '::' . $body);
2896
2897                         $hook_data = ['item' => $item, 'rendered-html' => $item['rendered-html'], 'rendered-hash' => $item['rendered-hash']];
2898                         Hook::callAll('put_item_in_cache', $hook_data);
2899                         $item['rendered-html'] = $hook_data['rendered-html'];
2900                         $item['rendered-hash'] = $hook_data['rendered-hash'];
2901                         unset($hook_data);
2902
2903                         // Update if the generated values differ from the existing ones
2904                         if ((($rendered_hash != $item['rendered-hash']) || ($rendered_html != $item['rendered-html'])) && !empty($item['id'])) {
2905                                 self::update(
2906                                         [
2907                                                 'rendered-html' => $item['rendered-html'],
2908                                                 'rendered-hash' => $item['rendered-hash']
2909                                         ],
2910                                         ['id' => $item['id']]
2911                                 );
2912                         }
2913                 }
2914
2915                 $item['body'] = $body;
2916         }
2917
2918         /**
2919          * Given an item array, convert the body element from bbcode to html and add smilie icons.
2920          * If attach is true, also add icons for item attachments.
2921          *
2922          * @param array   $item Record from item table
2923          * @param boolean $attach If true, add icons for item attachments as well
2924          * @param boolean $is_preview Whether this is a preview
2925          * @param boolean $only_cache Whether only cached HTML should be updated
2926          * @return string item body html
2927          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
2928          * @throws \ImagickException
2929          * @hook  prepare_body_init item array before any work
2930          * @hook  prepare_body_content_filter ('item'=>item array, 'filter_reasons'=>string array) before first bbcode to html
2931          * @hook  prepare_body ('item'=>item array, 'html'=>body string, 'is_preview'=>boolean, 'filter_reasons'=>string array) after first bbcode to html
2932          * @hook  prepare_body_final ('item'=>item array, 'html'=>body string) after attach icons and blockquote special case handling (spoiler, author)
2933          */
2934         public static function prepareBody(array &$item, bool $attach = false, bool $is_preview = false, bool $only_cache = false): string
2935         {
2936                 $a = DI::app();
2937                 Hook::callAll('prepare_body_init', $item);
2938
2939                 // In order to provide theme developers more possibilities, event items
2940                 // are treated differently.
2941                 if ($item['object-type'] === Activity\ObjectType::EVENT && isset($item['event-id'])) {
2942                         $ev = Event::getItemHTML($item);
2943                         return $ev;
2944                 }
2945
2946                 $tags = Tag::populateFromItem($item);
2947
2948                 $item['tags'] = $tags['tags'];
2949                 $item['hashtags'] = $tags['hashtags'];
2950                 $item['mentions'] = $tags['mentions'];
2951
2952                 $body = $item['body'] ?? '';
2953                 $shared = BBCode::fetchShareAttributes($body);
2954                 if (!empty($shared['guid'])) {
2955                         $shared_item = Post::selectFirst(['uri-id', 'guid', 'plink', 'has-media'], ['guid' => $shared['guid'], 'uid' => [$item['uid'], 0]]);
2956                 }
2957
2958                 $fields = ['uri-id', 'uri', 'body', 'title', 'author-name', 'author-link', 'author-avatar', 'guid', 'created', 'plink', 'network', 'has-media'];
2959
2960                 $shared_uri_id = 0;
2961                 $shared_links  = [];
2962
2963                 if (empty($shared_item['uri-id']) && !empty($item['quote-uri-id'])) {
2964                         $shared_item = Post::selectFirst($fields, ['uri-id' => $item['quote-uri-id']]);
2965                         $quote_uri_id = $item['quote-uri-id'] ?? 0;
2966                         $shared_links[] = strtolower($item['quote-uri']);
2967                 } elseif (empty($shared_item['uri-id']) && empty($item['quote-uri-id'])) {
2968                         $media = Post\Media::getByURIId($item['uri-id'], [Post\Media::ACTIVITY]);
2969                         if (!empty($media)) {
2970                                 $shared_item = Post::selectFirst($fields, ['plink' => $media[0]['url'], 'uid' => [$item['uid'], 0]]);
2971
2972                                 if (empty($shared_item['uri-id'])) {
2973                                         $shared_item = Post::selectFirst($fields, ['uri' => $media[0]['url'], 'uid' => [$item['uid'], 0]]);
2974                                         $shared_links[] = strtolower($media[0]['url']);
2975                                 }
2976
2977                                 $quote_uri_id = $shared_item['uri-id'] ?? 0;
2978                         }
2979                 }
2980
2981                 if (!empty($quote_uri_id)) {
2982                         $item['body'] .= "\n" . DI::contentItem()->createSharedBlockByArray($shared_item);
2983                 }
2984
2985                 if (!empty($shared_item['uri-id'])) {
2986                         $shared_uri_id = $shared_item['uri-id'];
2987                         $shared_links[] = strtolower($shared_item['plink']);
2988                         $shared_attachments = Post\Media::splitAttachments($shared_uri_id, $shared_item['guid'], [], $shared_item['has-media']);
2989                         $shared_links = array_merge($shared_links, array_column($shared_attachments['visual'], 'url'));
2990                         $shared_links = array_merge($shared_links, array_column($shared_attachments['link'], 'url'));
2991                         $shared_links = array_merge($shared_links, array_column($shared_attachments['additional'], 'url'));
2992                         $item['body'] = self::replaceVisualAttachments($shared_attachments, $item['body']);
2993                 }
2994
2995                 $attachments = Post\Media::splitAttachments($item['uri-id'], $item['guid'] ?? '', $shared_links, $item['has-media'] ?? false);
2996                 $item['body'] = self::replaceVisualAttachments($attachments, $item['body'] ?? '');
2997
2998                 $item['body'] = preg_replace("/\s*\[attachment .*?\].*?\[\/attachment\]\s*/ism", "\n", $item['body']);
2999                 self::putInCache($item);
3000                 $item['body'] = $body;
3001                 $s = $item["rendered-html"];
3002
3003                 if ($only_cache) {
3004                         return '';
3005                 }
3006
3007                 // Compile eventual content filter reasons
3008                 $filter_reasons = [];
3009                 if (!$is_preview && public_contact() != $item['author-id']) {
3010                         if (!empty($item['content-warning']) && (!local_user() || !DI::pConfig()->get(local_user(), 'system', 'disable_cw', false))) {
3011                                 $filter_reasons[] = DI::l10n()->t('Content warning: %s', $item['content-warning']);
3012                         }
3013
3014                         $item['attachments'] = $attachments;
3015
3016                         $hook_data = [
3017                                 'item' => $item,
3018                                 'filter_reasons' => $filter_reasons
3019                         ];
3020                         Hook::callAll('prepare_body_content_filter', $hook_data);
3021                         $filter_reasons = $hook_data['filter_reasons'];
3022                         unset($hook_data);
3023                 }
3024
3025                 $hook_data = [
3026                         'item' => $item,
3027                         'html' => $s,
3028                         'preview' => $is_preview,
3029                         'filter_reasons' => $filter_reasons
3030                 ];
3031                 Hook::callAll('prepare_body', $hook_data);
3032                 $s = $hook_data['html'];
3033                 unset($hook_data);
3034
3035                 if (!$attach) {
3036                         // Replace the blockquotes with quotes that are used in mails.
3037                         $mailquote = '<blockquote type="cite" class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">';
3038                         $s = str_replace(['<blockquote>', '<blockquote class="spoiler">', '<blockquote class="author">'], [$mailquote, $mailquote, $mailquote], $s);
3039                         return $s;
3040                 }
3041
3042                 if (!empty($shared_attachments)) {
3043                         $s = self::addVisualAttachments($shared_attachments, $item, $s, true);
3044                         $s = self::addLinkAttachment($shared_uri_id ?: $item['uri-id'], $shared_attachments, $body, $s, true, []);
3045                         $s = self::addNonVisualAttachments($shared_attachments, $item, $s, true);
3046                         $body = preg_replace("/\s*\[share .*?\].*?\[\/share\]\s*/ism", '', $body);
3047                 }
3048
3049                 $s = self::addVisualAttachments($attachments, $item, $s, false);
3050                 $s = self::addLinkAttachment($item['uri-id'], $attachments, $body, $s, false, $shared_links);
3051                 $s = self::addNonVisualAttachments($attachments, $item, $s, false);
3052                 $s = self::addQuestions($item, $s);
3053
3054                 // Map.
3055                 if (strpos($s, '<div class="map">') !== false && !empty($item['coord'])) {
3056                         $x = Map::byCoordinates(trim($item['coord']));
3057                         if ($x) {
3058                                 $s = preg_replace('/\<div class\=\"map\"\>/', '$0' . $x, $s);
3059                         }
3060                 }
3061
3062                 // Replace friendica image url size with theme preference.
3063                 if (!empty($a->getThemeInfoValue('item_image_size'))) {
3064                         $ps = $a->getThemeInfoValue('item_image_size');
3065                         $s = preg_replace('|(<img[^>]+src="[^"]+/photo/[0-9a-f]+)-[0-9]|', "$1-" . $ps, $s);
3066                 }
3067
3068                 $s = HTML::applyContentFilter($s, $filter_reasons);
3069
3070                 $hook_data = ['item' => $item, 'html' => $s];
3071                 Hook::callAll('prepare_body_final', $hook_data);
3072
3073                 return $hook_data['html'];
3074         }
3075
3076         /**
3077          * Check if the body contains a link
3078          *
3079          * @param string $body
3080          * @param string $url
3081          * @param int    $type
3082          * @return bool
3083          */
3084         public static function containsLink(string $body, string $url, int $type = 0): bool
3085         {
3086                 // Make sure that for example site parameters aren't used when testing if the link is contained in the body
3087                 $urlparts = parse_url($url);
3088                 if (!empty($urlparts)) {
3089                         unset($urlparts['query']);
3090                         unset($urlparts['fragment']);
3091                         $url = (string)Uri::fromParts($urlparts);
3092                 } else {
3093                         return false;
3094                 }
3095
3096                 // Remove media links to only search in embedded content
3097                 // @todo Check images for image link, audio for audio links, ...
3098                 if (in_array($type, [Post\Media::AUDIO, Post\Media::VIDEO, Post\Media::IMAGE])) {
3099                         $body = preg_replace("/\[url=[^\[\]]*\](.*)\[\/url\]/Usi", ' $1 ', $body);
3100                 }
3101
3102                 if (strpos($body, $url)) {
3103                         return true;
3104                 }
3105                 foreach ([0, 1, 2] as $size) {
3106                         if (preg_match('#/photo/.*-' . $size . '\.#ism', $url) &&
3107                                 strpos(preg_replace('#(/photo/.*)-[012]\.#ism', '$1-' . $size . '.', $body), $url)) {
3108                                 return true;
3109                         }
3110                 }
3111                 return false;
3112         }
3113
3114         /**
3115          * Replace visual attachments in the body
3116          *
3117          * @param array $attachments
3118          * @param string $body
3119          * @return string modified body
3120          */
3121         private static function replaceVisualAttachments(array $attachments, string $body): string
3122         {
3123                 DI::profiler()->startRecording('rendering');
3124
3125                 foreach ($attachments['visual'] as $attachment) {
3126                         if (!empty($attachment['preview'])) {
3127                                 $proxy   = Post\Media::getPreviewUrlForId($attachment['id'], Proxy::SIZE_LARGE);
3128                                 $search  = ['[img=' . $attachment['preview'] . ']', ']' . $attachment['preview'] . '[/img]'];
3129                                 $replace = ['[img=' . $proxy . ']', ']' . $proxy . '[/img]'];
3130
3131                                 $body = str_replace($search, $replace, $body);
3132                         } elseif ($attachment['filetype'] == 'image') {
3133                                 $proxy   = Post\Media::getUrlForId($attachment['id']);
3134                                 $search  = ['[img=' . $attachment['url'] . ']', ']' . $attachment['url'] . '[/img]'];
3135                                 $replace = ['[img=' . $proxy . ']', ']' . $proxy . '[/img]'];
3136
3137                                 $body = str_replace($search, $replace, $body);
3138                         }
3139                 }
3140                 DI::profiler()->stopRecording();
3141                 return $body;
3142         }
3143
3144         /**
3145          * Add visual attachments to the content
3146          *
3147          * @param array $attachments
3148          * @param array $item
3149          * @param string $content
3150          * @return string modified content
3151          */
3152         private static function addVisualAttachments(array $attachments, array $item, string $content, bool $shared): string
3153         {
3154                 DI::profiler()->startRecording('rendering');
3155                 $leading = '';
3156                 $trailing = '';
3157
3158                 // @todo In the future we should make a single for the template engine with all media in it. This allows more flexibilty.
3159                 foreach ($attachments['visual'] as $attachment) {
3160                         if (self::containsLink($item['body'], $attachment['preview'] ?? $attachment['url'], $attachment['type'])) {
3161                                 continue;
3162                         }
3163
3164                         if (!empty($attachment['preview'])) {
3165                                 $preview_url = Post\Media::getPreviewUrlForId($attachment['id'], Proxy::SIZE_LARGE);
3166                         } else {
3167                                 $preview_url = '';
3168                         }
3169
3170                         if (($attachment['filetype'] == 'video')) {
3171                                 /// @todo Move the template to /content as well
3172                                 $media = Renderer::replaceMacros(Renderer::getMarkupTemplate('video_top.tpl'), [
3173                                         '$video' => [
3174                                                 'id'      => $attachment['id'],
3175                                                 'src'     => $attachment['url'],
3176                                                 'name'    => $attachment['name'] ?: $attachment['url'],
3177                                                 'preview' => $preview_url,
3178                                                 'mime'    => $attachment['mimetype'],
3179                                         ],
3180                                 ]);
3181                                 if (($item['post-type'] ?? null) == Item::PT_VIDEO) {
3182                                         $leading .= $media;
3183                                 } else {
3184                                         $trailing .= $media;
3185                                 }
3186                         } elseif ($attachment['filetype'] == 'audio') {
3187                                 $media = Renderer::replaceMacros(Renderer::getMarkupTemplate('content/audio.tpl'), [
3188                                         '$audio' => [
3189                                                 'id'     => $attachment['id'],
3190                                                 'src'    => $attachment['url'],
3191                                                 'name'   => $attachment['name'] ?: $attachment['url'],
3192                                                 'mime'   => $attachment['mimetype'],
3193                                         ],
3194                                 ]);
3195                                 if (($item['post-type'] ?? null) == Item::PT_AUDIO) {
3196                                         $leading .= $media;
3197                                 } else {
3198                                         $trailing .= $media;
3199                                 }
3200                         } elseif ($attachment['filetype'] == 'image') {
3201                                 $media = Renderer::replaceMacros(Renderer::getMarkupTemplate('content/image.tpl'), [
3202                                         '$image' => [
3203                                                 'src'        => Post\Media::getUrlForId($attachment['id']),
3204                                                 'preview'    => Post\Media::getPreviewUrlForId($attachment['id'], ($attachment['width'] > $attachment['height']) ? Proxy::SIZE_MEDIUM : Proxy::SIZE_LARGE),
3205                                                 'attachment' => $attachment,
3206                                         ],
3207                                 ]);
3208                                 // On Diaspora posts the attached pictures are leading
3209                                 if ($item['network'] == Protocol::DIASPORA) {
3210                                         $leading .= $media;
3211                                 } else {
3212                                         $trailing .= $media;
3213                                 }
3214                         }
3215                 }
3216
3217                 if ($shared) {
3218                         $content = str_replace(BBCode::TOP_ANCHOR, '<div class="body-attach">' . $leading . '<div class="clear"></div></div>' . BBCode::TOP_ANCHOR, $content);
3219                         $content = str_replace(BBCode::BOTTOM_ANCHOR, '<div class="body-attach">' . $trailing . '<div class="clear"></div></div>' . BBCode::BOTTOM_ANCHOR, $content);
3220                 } else {
3221                         if ($leading != '') {
3222                                 $content = '<div class="body-attach">' . $leading . '<div class="clear"></div></div>' . $content;
3223                         }
3224
3225                         if ($trailing != '') {
3226                                 $content .= '<div class="body-attach">' . $trailing . '<div class="clear"></div></div>';
3227                         }
3228                 }
3229
3230                 DI::profiler()->stopRecording();
3231                 return $content;
3232         }
3233
3234         /**
3235          * Add link attachment to the content
3236          *
3237          * @param array  $attachments
3238          * @param string $body
3239          * @param string $content
3240          * @param bool   $shared
3241          * @param array  $ignore_links A list of URLs to ignore
3242          * @return string modified content
3243          */
3244         private static function addLinkAttachment(int $uriid, array $attachments, string $body, string $content, bool $shared, array $ignore_links): string
3245         {
3246                 DI::profiler()->startRecording('rendering');
3247                 // Don't show a preview when there is a visual attachment (audio or video)
3248                 $types = array_column($attachments['visual'], 'type');
3249                 $preview = !in_array(Post\Media::IMAGE, $types) && !in_array(Post\Media::VIDEO, $types);
3250
3251                 if (!empty($attachments['link'])) {
3252                         foreach ($attachments['link'] as $link) {
3253                                 $found = false;
3254                                 foreach ($ignore_links as $ignore_link) {
3255                                         if (Strings::compareLink($link['url'], $ignore_link)) {
3256                                                 $found = true;
3257                                         }
3258                                 }
3259                                 // @todo Judge between the links to use the one with most information
3260                                 if (!$found && (empty($attachment) || !empty($link['author-name']) ||
3261                                         (empty($attachment['name']) && !empty($link['name'])) ||
3262                                         (empty($attachment['description']) && !empty($link['description'])) ||
3263                                         (empty($attachment['preview']) && !empty($link['preview'])))) {
3264                                         $attachment = $link;
3265                                 }
3266                         }
3267                 }
3268
3269                 if (!empty($attachment)) {
3270                         $data = [
3271                                 'after' => '',
3272                                 'author_name' => $attachment['author-name'] ?? '',
3273                                 'author_url' =>  $attachment['author-url'] ?? '',
3274                                 'description' => $attachment['description'] ?? '',
3275                                 'image' => '',
3276                                 'preview' => '',
3277                                 'provider_name' => $attachment['publisher-name'] ?? '',
3278                                 'provider_url' => $attachment['publisher-url'] ?? '',
3279                                 'text' => '',
3280                                 'title' => $attachment['name'] ?? '',
3281                                 'type' => 'link',
3282                                 'url' => $attachment['url']];
3283
3284                         if ($preview && !empty($attachment['preview'])) {
3285                                 if ($attachment['preview-width'] >= 500) {
3286                                         $data['image'] = Post\Media::getPreviewUrlForId($attachment['id'], Proxy::SIZE_MEDIUM);
3287                                 } else {
3288                                         $data['preview'] = Post\Media::getPreviewUrlForId($attachment['id'], Proxy::SIZE_MEDIUM);
3289                                 }
3290                         }
3291
3292                         if (!empty($data['description']) && !empty($content)) {
3293                                 similar_text($data['description'], $content, $percent);
3294                         } else {
3295                                 $percent = 0;
3296                         }
3297
3298                         if (!empty($data['description']) && (($data['title'] == $data['description']) || ($percent > 95) || (strpos($content, $data['description']) !== false))) {
3299                                 $data['description'] = '';
3300                         }
3301
3302                         if (($data['author_name'] ?? '') == ($data['provider_name'] ?? '')) {
3303                                 $data['author_name'] = '';
3304                         }
3305
3306                         if (($data['author_url'] ?? '') == ($data['provider_url'] ?? '')) {
3307                                 $data['author_url'] = '';
3308                         }
3309                 } elseif (preg_match("/.*(\[attachment.*?\].*?\[\/attachment\]).*/ism", $body, $match)) {
3310                         $data = BBCode::getAttachmentData($match[1]);
3311                 }
3312                 DI::profiler()->stopRecording();
3313
3314                 if (isset($data['url']) && !in_array(strtolower($data['url']), $ignore_links)) {
3315                         if (!empty($data['description']) || !empty($data['image']) || !empty($data['preview'])) {
3316                                 $parts = parse_url($data['url']);
3317                                 if (!empty($parts['scheme']) && !empty($parts['host'])) {
3318                                         if (empty($data['provider_name'])) {
3319                                                 $data['provider_name'] = $parts['host'];
3320                                         }
3321                                         if (empty($data['provider_url']) || empty(parse_url($data['provider_url'], PHP_URL_SCHEME))) {
3322                                                 $data['provider_url'] = $parts['scheme'] . '://' . $parts['host'];
3323
3324                                                 if (!empty($parts['port'])) {
3325                                                         $data['provider_url'] .= ':' . $parts['port'];
3326                                                 }
3327                                         }
3328                                 }
3329
3330                                 // @todo Use a template
3331                                 $rendered = BBCode::convertAttachment('', BBCode::INTERNAL, false, $data, $uriid);
3332                         } elseif (!self::containsLink($content, $data['url'], Post\Media::HTML)) {
3333                                 $rendered = Renderer::replaceMacros(Renderer::getMarkupTemplate('content/link.tpl'), [
3334                                         '$url'  => $data['url'],
3335                                         '$title' => $data['title'],
3336                                 ]);
3337                         } else {
3338                                 return $content;
3339                         }
3340
3341                         if ($shared) {
3342                                 return str_replace(BBCode::BOTTOM_ANCHOR, BBCode::BOTTOM_ANCHOR . $rendered, $content);
3343                         } else {
3344                                 return $content . $rendered;
3345                         }
3346                 }
3347                 return $content;
3348         }
3349
3350         /**
3351          * Add non visual attachments to the content
3352          *
3353          * @param array $attachments
3354          * @param array $item
3355          * @param string $content
3356          * @return string modified content
3357          */
3358         private static function addNonVisualAttachments(array $attachments, array $item, string $content): string
3359         {
3360                 DI::profiler()->startRecording('rendering');
3361                 $trailing = '';
3362                 foreach ($attachments['additional'] as $attachment) {
3363                         if (strpos($item['body'], $attachment['url'])) {
3364                                 continue;
3365                         }
3366
3367                         $author = ['uid' => 0, 'id' => $item['author-id'],
3368                                 'network' => $item['author-network'], 'url' => $item['author-link']];
3369                         $the_url = Contact::magicLinkByContact($author, $attachment['url']);
3370
3371                         $title = Strings::escapeHtml(trim(($attachment['description'] ?? '') ?: $attachment['url']));
3372
3373                         if (!empty($attachment['size'])) {
3374                                 $title .= ' ' . $attachment['size'] . ' ' . DI::l10n()->t('bytes');
3375                         }
3376
3377                         /// @todo Use a template
3378                         $icon = '<div class="attachtype icon s22 type-' . $attachment['filetype'] . ' subtype-' . $attachment['subtype'] . '"></div>';
3379                         $trailing .= '<a href="' . strip_tags($the_url) . '" title="' . $title . '" class="attachlink" target="_blank" rel="noopener noreferrer" >' . $icon . '</a>';
3380                 }
3381
3382                 if ($trailing != '') {
3383                         $content .= '<div class="body-attach">' . $trailing . '<div class="clear"></div></div>';
3384                 }
3385
3386                 DI::profiler()->stopRecording();
3387                 return $content;
3388         }
3389
3390         private static function addQuestions(array $item, string $content): string
3391         {
3392                 DI::profiler()->startRecording('rendering');
3393                 if (!empty($item['question-id'])) {
3394                         $question = [
3395                                 'id'       => $item['question-id'],
3396                                 'multiple' => $item['question-multiple'],
3397                                 'voters'   => $item['question-voters'],
3398                                 'endtime'  => $item['question-end-time']
3399                         ];
3400
3401                         $options = Post\QuestionOption::getByURIId($item['uri-id']);
3402                         foreach ($options as $key => $option) {
3403                                 if ($question['voters'] > 0) {
3404                                         $percent = $option['replies'] / $question['voters'] * 100;
3405                                         $options[$key]['vote'] = DI::l10n()->tt('%2$s (%3$d%%, %1$d vote)', '%2$s (%3$d%%, %1$d votes)', $option['replies'], $option['name'], round($percent, 1));
3406                                 } else {
3407                                         $options[$key]['vote'] = DI::l10n()->tt('%2$s (%1$d vote)', '%2$s (%1$d votes)', $option['replies'], $option['name'], );
3408                                 }
3409                         }
3410
3411                         if (!empty($question['voters']) && !empty($question['endtime'])) {
3412                                 $summary = DI::l10n()->tt('%d voter. Poll end: %s', '%d voters. Poll end: %s', $question['voters'], Temporal::getRelativeDate($question['endtime']));
3413                         } elseif (!empty($question['voters'])) {
3414                                 $summary = DI::l10n()->tt('%d voter.', '%d voters.', $question['voters']);
3415                         } elseif (!empty($question['endtime'])) {
3416                                 $summary = DI::l10n()->t('Poll end: %s', Temporal::getRelativeDate($question['endtime']));
3417                         } else {
3418                                 $summary = '';
3419                         }
3420
3421                         $content .= Renderer::replaceMacros(Renderer::getMarkupTemplate('content/question.tpl'), [
3422                                 '$question' => $question,
3423                                 '$options'  => $options,
3424                                 '$summary'  => $summary,
3425                         ]);
3426         }
3427                 DI::profiler()->stopRecording();
3428                 return $content;
3429         }
3430
3431         /**
3432          * get private link for item
3433          *
3434          * @param array $item
3435          * @return boolean|array False if item has not plink, otherwise array('href'=>plink url, 'title'=>translated title)
3436          * @throws \Exception
3437          */
3438         public static function getPlink(array $item)
3439         {
3440                 if (!empty($item['plink']) && Network::isValidHttpUrl($item['plink'])) {
3441                         $plink = $item['plink'];
3442                 } elseif (!empty($item['uri']) && Network::isValidHttpUrl($item['uri']) && !Network::isLocalLink($item['uri'])) {
3443                         $plink = $item['uri'];
3444                 }
3445
3446                 if (local_user()) {
3447                         $ret = [
3448                                 'href' => "display/" . $item['guid'],
3449                                 'orig' => "display/" . $item['guid'],
3450                                 'title' => DI::l10n()->t('View on separate page'),
3451                                 'orig_title' => DI::l10n()->t('View on separate page'),
3452                         ];
3453
3454                         if (!empty($plink) && ($item['private'] == self::PRIVATE)) {
3455                                 $author = ['uid' => 0, 'id' => $item['author-id'],
3456                                         'network' => $item['author-network'], 'url' => $item['author-link']];
3457                                 $plink = Contact::magicLinkByContact($author, $plink);
3458                         }
3459
3460                         if (!empty($plink)) {
3461                                 $ret['href'] = DI::baseUrl()->remove($plink);
3462                                 $ret['title'] = DI::l10n()->t('Link to source');
3463                         }
3464                 } elseif (!empty($plink) && ($item['private'] != self::PRIVATE)) {
3465                         $ret = [
3466                                 'href' => $plink,
3467                                 'orig' => $plink,
3468                                 'title' => DI::l10n()->t('Link to source'),
3469                                 'orig_title' => DI::l10n()->t('Link to source'),
3470                         ];
3471                 } else {
3472                         $ret = [];
3473                 }
3474
3475                 return $ret;
3476         }
3477
3478         /**
3479          * Does the given uri-id belongs to a post that is sent as starting post to a forum?
3480          *
3481          * @param int $uri_id
3482          *
3483          * @return boolean "true" when it is a forum post
3484          */
3485         public static function isForumPost(int $uri_id): bool
3486         {
3487                 foreach (Tag::getByURIId($uri_id, [Tag::EXCLUSIVE_MENTION]) as $tag) {
3488                         if (DBA::exists('contact', ['uid' => 0, 'nurl' => Strings::normaliseLink($tag['url']), 'contact-type' => Contact::TYPE_COMMUNITY])) {
3489                                 return true;
3490                         }
3491                 }
3492                 return false;
3493         }
3494
3495         /**
3496          * Search item id for given URI or plink
3497          *
3498          * @param string $uri
3499          * @param integer $uid
3500          *
3501          * @return integer item id
3502          */
3503         public static function searchByLink(string $uri, int $uid = 0): int
3504         {
3505                 $ssl_uri = str_replace('http://', 'https://', $uri);
3506                 $uris = [$uri, $ssl_uri, Strings::normaliseLink($uri)];
3507
3508                 $item = Post::selectFirst(['id'], ['uri' => $uris, 'uid' => $uid]);
3509                 if (DBA::isResult($item)) {
3510                         return $item['id'];
3511                 }
3512
3513                 $item = Post::selectFirst(['id'], ['plink' => $uris, 'uid' => $uid]);
3514                 if (DBA::isResult($item)) {
3515                         return $item['id'];
3516                 }
3517
3518                 return 0;
3519         }
3520
3521         /**
3522          * Return the URI for a link to the post
3523          *
3524          * @param string $uri URI or link to post
3525          *
3526          * @return string URI
3527          */
3528         public static function getURIByLink(string $uri): string
3529         {
3530                 $ssl_uri = str_replace('http://', 'https://', $uri);
3531                 $uris = [$uri, $ssl_uri, Strings::normaliseLink($uri)];
3532
3533                 $item = Post::selectFirst(['uri'], ['uri' => $uris]);
3534                 if (DBA::isResult($item)) {
3535                         return $item['uri'];
3536                 }
3537
3538                 $item = Post::selectFirst(['uri'], ['plink' => $uris]);
3539                 if (DBA::isResult($item)) {
3540                         return $item['uri'];
3541                 }
3542
3543                 return '';
3544         }
3545
3546         /**
3547          * Fetches item for given URI or plink
3548          *
3549          * @param string $uri
3550          * @param integer $uid
3551          *
3552          * @return integer item id
3553          */
3554         public static function fetchByLink(string $uri, int $uid = 0): int
3555         {
3556                 Logger::info('Trying to fetch link', ['uid' => $uid, 'uri' => $uri]);
3557                 $item_id = self::searchByLink($uri, $uid);
3558                 if (!empty($item_id)) {
3559                         Logger::info('Link found', ['uid' => $uid, 'uri' => $uri, 'id' => $item_id]);
3560                         return $item_id;
3561                 }
3562
3563                 $hookData = [
3564                         'uri'     => $uri,
3565                         'uid'     => $uid,
3566                         'item_id' => null,
3567                 ];
3568
3569                 Hook::callAll('item_by_link', $hookData);
3570
3571                 if (isset($hookData['item_id'])) {
3572                         return is_numeric($hookData['item_id']) ? $hookData['item_id'] : 0;
3573                 }
3574
3575                 $fetched_uri = ActivityPub\Processor::fetchMissingActivity($uri);
3576
3577                 if ($fetched_uri) {
3578                         $item_id = self::searchByLink($fetched_uri, $uid);
3579                 } else {
3580                         $item_id = Diaspora::fetchByURL($uri);
3581                 }
3582
3583                 if (!empty($item_id)) {
3584                         Logger::info('Link fetched', ['uid' => $uid, 'uri' => $uri, 'id' => $item_id]);
3585                         return $item_id;
3586                 }
3587
3588                 Logger::info('Link not found', ['uid' => $uid, 'uri' => $uri]);
3589                 return 0;
3590         }
3591
3592         /**
3593          * Return share data from an item array (if the item is shared item)
3594          * We are providing the complete Item array, because at some time in the future
3595          * we hopefully will define these values not in the body anymore but in some item fields.
3596          * This function is meant to replace all similar functions in the system.
3597          *
3598          * @param array $item
3599          *
3600          * @return array with share information
3601          */
3602         public static function getShareArray(array $item): array
3603         {
3604                 return BBCode::fetchShareAttributes($item['body']);
3605         }
3606
3607         /**
3608          * Check a prospective item array against user-level permissions
3609          *
3610          * @param array $item Expected keys: uri, gravity, and
3611          *                    author-link if is author-id is set,
3612          *                    owner-link if is owner-id is set,
3613          *                    causer-link if is causer-id is set.
3614          * @param int   $user_id Local user ID
3615          * @return bool
3616          * @throws \Exception
3617          */
3618         protected static function isAllowedByUser(array $item, int $user_id): bool
3619         {
3620                 if (!empty($item['author-id']) && Contact\User::isBlocked($item['author-id'], $user_id)) {
3621                         Logger::notice('Author is blocked by user', ['author-link' => $item['author-link'], 'uid' => $user_id, 'item-uri' => $item['uri']]);
3622                         return false;
3623                 }
3624
3625                 if (!empty($item['owner-id']) && Contact\User::isBlocked($item['owner-id'], $user_id)) {
3626                         Logger::notice('Owner is blocked by user', ['owner-link' => $item['owner-link'], 'uid' => $user_id, 'item-uri' => $item['uri']]);
3627                         return false;
3628                 }
3629
3630                 // The causer is set during a thread completion, for example because of a reshare. It countains the responsible actor.
3631                 if (!empty($item['causer-id']) && Contact\User::isBlocked($item['causer-id'], $user_id)) {
3632                         Logger::notice('Causer is blocked by user', ['causer-link' => $item['causer-link'] ?? $item['causer-id'], 'uid' => $user_id, 'item-uri' => $item['uri']]);
3633                         return false;
3634                 }
3635
3636                 if (!empty($item['causer-id']) && ($item['gravity'] === self::GRAVITY_PARENT) && Contact\User::isIgnored($item['causer-id'], $user_id)) {
3637                         Logger::notice('Causer is ignored by user', ['causer-link' => $item['causer-link'] ?? $item['causer-id'], 'uid' => $user_id, 'item-uri' => $item['uri']]);
3638                         return false;
3639                 }
3640
3641                 return true;
3642         }
3643
3644         /**
3645          * Improve the data in shared posts
3646          *
3647          * @param array $item
3648          * @param bool  $add_media
3649          * @return string body
3650          */
3651         public static function improveSharedDataInBody(array $item, bool $add_media = false): string
3652         {
3653                 $shared = BBCode::fetchShareAttributes($item['body']);
3654                 if (empty($shared['guid']) && empty($shared['message_id'])) {
3655                         return $item['body'];
3656                 }
3657
3658                 $link = $shared['link'] ?: $shared['message_id'];
3659
3660                 if (empty($shared_content)) {
3661                         $shared_content = DI::contentItem()->createSharedPostByUrl($link, $item['uid'] ?? 0, $add_media);
3662                 }
3663
3664                 if (empty($shared_content)) {
3665                         return $item['body'];
3666                 }
3667
3668                 $item['body'] = preg_replace("/\[share.*?\](.*)\[\/share\]/ism", $shared_content, $item['body']);
3669
3670                 Logger::debug('New shared data', ['uri-id' => $item['uri-id'], 'link' => $link, 'guid' => $item['guid']]);
3671                 return $item['body'];
3672         }
3673
3674         /**
3675          * Fetch the uri-id of a quote
3676          *
3677          * @param string $body
3678          * @return integer
3679          */
3680         private static function getQuoteUriId(string $body): int
3681         {
3682                 $shared = BBCode::fetchShareAttributes($body);
3683                 if (empty($shared['message_id'])) {
3684                         return 0;
3685                 }
3686                 return ItemURI::getIdByURI($shared['message_id']);
3687         }
3688 }