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\Model\Post;
  37 use Friendica\Protocol\Activity;
  38 use Friendica\Protocol\ActivityPub;
  39 use Friendica\Protocol\Diaspora;
  40 use Friendica\Util\DateTimeFormat;
  41 use Friendica\Util\Map;
  42 use Friendica\Util\Network;
  43 use Friendica\Util\Proxy;
  44 use Friendica\Util\Strings;
  45 use Friendica\Worker\Delivery;
  46 use LanguageDetection\Language;
  47
  48 class Item
  49 {
  50         // Posting types, inspired by https://www.w3.org/TR/activitystreams-vocabulary/#object-types
  51         const PT_ARTICLE = 0;
  52         const PT_NOTE = 1;
  53         const PT_PAGE = 2;
  54         const PT_IMAGE = 16;
  55         const PT_AUDIO = 17;
  56         const PT_VIDEO = 18;
  57         const PT_DOCUMENT = 19;
  58         const PT_EVENT = 32;
  59         const PT_POLL = 33;
  60         const PT_PERSONAL_NOTE = 128;
  61
  62         // Posting reasons (Why had a post been stored for a user?)
  63         const PR_NONE = 0;
  64         const PR_TAG = 64;
  65         const PR_TO = 65;
  66         const PR_CC = 66;
  67         const PR_BTO = 67;
  68         const PR_BCC = 68;
  69         const PR_FOLLOWER = 69;
  70         const PR_ANNOUNCEMENT = 70;
  71         const PR_COMMENT = 71;
  72         const PR_STORED = 72;
  73         const PR_GLOBAL = 73;
  74         const PR_RELAY = 74;
  75         const PR_FETCHED = 75;
  76
  77         // system.accept_only_sharer setting values
  78         const COMPLETION_NONE    = 1;
  79         const COMPLETION_COMMENT = 0;
  80         const COMPLETION_LIKE    = 2;
  81
  82         // Field list that is used to display the items
  83         const DISPLAY_FIELDLIST = [
  84                 'uid', 'id', 'parent', 'guid', 'network', 'gravity',
  85                 'uri-id', 'uri', 'thr-parent-id', 'thr-parent', 'parent-uri-id', 'parent-uri',
  86                 'commented', 'created', 'edited', 'received', 'verb', 'object-type', 'postopts', 'plink',
  87                 'wall', 'private', 'starred', 'origin', 'parent-origin', 'title', 'body', 'language',
  88                 'content-warning', 'location', 'coord', 'app', 'rendered-hash', 'rendered-html', 'object',
  89                 'allow_cid', 'allow_gid', 'deny_cid', 'deny_gid', 'mention', 'global',
  90                 'author-id', 'author-link', 'author-name', 'author-avatar', 'author-network',
  91                 'owner-id', 'owner-link', 'owner-name', 'owner-avatar', 'owner-network', 'owner-contact-type',
  92                 'causer-id', 'causer-link', 'causer-name', 'causer-avatar', 'causer-contact-type', 'causer-network',
  93                 'contact-id', 'contact-uid', 'contact-link', 'contact-name', 'contact-avatar',
  94                 'writable', 'self', 'cid', 'alias',
  95                 'event-created', 'event-edited', 'event-start', 'event-finish',
  96                 'event-summary', 'event-desc', 'event-location', 'event-type',
  97                 'event-nofinish', 'event-ignore', 'event-id',
  98                 'delivery_queue_count', 'delivery_queue_done', 'delivery_queue_failed'
  99         ];
 100
 101         // Field list that is used to deliver items via the protocols
 102         const DELIVER_FIELDLIST = ['uid', 'id', 'parent', 'uri-id', 'uri', 'thr-parent', 'parent-uri', 'guid',
 103                         'parent-guid', 'received', 'created', 'edited', 'verb', 'object-type', 'object', 'target',
 104                         'private', 'title', 'body', 'raw-body', 'location', 'coord', 'app',
 105                         'inform', 'deleted', 'extid', 'post-type', 'post-reason', 'gravity',
 106                         'allow_cid', 'allow_gid', 'deny_cid', 'deny_gid',
 107                         'author-id', 'author-link', 'author-name', 'author-avatar', 'owner-id', 'owner-link', 'contact-uid',
 108                         'signed_text', 'network', 'wall', 'contact-id', 'plink', 'origin',
 109                         'thr-parent-id', 'parent-uri-id', 'postopts', 'pubmail',
 110                         'event-created', 'event-edited', 'event-start', 'event-finish',
 111                         'event-summary', 'event-desc', 'event-location', 'event-type',
 112                         'event-nofinish', 'event-ignore', 'event-id'];
 113
 114         // All fields in the item table
 115         const ITEM_FIELDLIST = ['id', 'uid', 'parent', 'uri', 'parent-uri', 'thr-parent',
 116                         'guid', 'uri-id', 'parent-uri-id', 'thr-parent-id', 'vid',
 117                         'contact-id', 'wall', 'gravity', 'extid', 'psid',
 118                         'created', 'edited', 'commented', 'received', 'changed', 'verb',
 119                         'postopts', 'plink', 'resource-id', 'event-id', 'inform',
 120                         'allow_cid', 'allow_gid', 'deny_cid', 'deny_gid', 'post-type', 'post-reason',
 121                         'private', 'pubmail', 'visible', 'starred',
 122                         'unseen', 'deleted', 'origin', 'mention', 'global', 'network',
 123                         'title', 'content-warning', 'body', 'location', 'coord', 'app',
 124                         'rendered-hash', 'rendered-html', 'object-type', 'object', 'target-type', 'target',
 125                         'author-id', 'author-link', 'author-name', 'author-avatar', 'author-network',
 126                         'owner-id', 'owner-link', 'owner-name', 'owner-avatar', 'causer-id'];
 127
 128         // List of all verbs that don't need additional content data.
 129         // Never reorder or remove entries from this list. Just add new ones at the end, if needed.
 130         const ACTIVITIES = [
 131                 Activity::LIKE, Activity::DISLIKE,
 132                 Activity::ATTEND, Activity::ATTENDNO, Activity::ATTENDMAYBE,
 133                 Activity::FOLLOW,
 134                 Activity::ANNOUNCE];
 135
 136         const PUBLIC = 0;
 137         const PRIVATE = 1;
 138         const UNLISTED = 2;
 139
 140         /**
 141          * Update existing item entries
 142          *
 143          * @param array $fields    The fields that are to be changed
 144          * @param array $condition The condition for finding the item entries
 145          *
 146          * In the future we may have to change permissions as well.
 147          * Then we had to add the user id as third parameter.
 148          *
 149          * A return value of "0" doesn't mean an error - but that 0 rows had been changed.
 150          *
 151          * @return integer|boolean number of affected rows - or "false" if there was an error
 152          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 153          */
 154         public static function update(array $fields, array $condition)
 155         {
 156                 if (empty($condition) || empty($fields)) {
 157                         return false;
 158                 }
 159
 160                 if (isset($fields['extid'])) {
 161                         $fields['external-id'] = ItemURI::getIdByURI($fields['extid']);
 162                 }
 163
 164                 if (!empty($fields['verb'])) {
 165                         $fields['vid'] = Verb::getID($fields['verb']);
 166                 }
 167
 168                 if (!empty($fields['edited'])) {
 169                         $previous = Post::selectFirst(['edited'], $condition);
 170                 }
 171
 172                 $rows = Post::update($fields, $condition);
 173                 if (is_bool($rows)) {
 174                         return $rows;
 175                 }
 176
 177                 // We only need to call the line by line update for specific fields
 178                 if (empty($fields['body']) && empty($fields['file']) &&
 179                         empty($fields['attach']) && empty($fields['edited'])) {
 180                         return $rows;
 181                 }
 182
 183                 Logger::info('Updating per single row method', ['fields' => $fields, 'condition' => $condition]);
 184
 185                 $items = Post::select(['id', 'origin', 'uri-id', 'uid', 'author-network'], $condition);
 186
 187                 $notify_items = [];
 188
 189                 while ($item = DBA::fetch($items)) {
 190                         if (!empty($fields['body'])) {
 191                                 Post\Media::insertFromAttachmentData($item['uri-id'], $fields['body']);
 192
 193                                 $content_fields = ['raw-body' => trim($fields['raw-body'] ?? $fields['body'])];
 194
 195                                 // Remove all media attachments from the body and store them in the post-media table
 196                                 // @todo On shared postings (Diaspora style and commented reshare) don't fetch content from the shared part
 197                                 $content_fields['raw-body'] = Post\Media::insertFromBody($item['uri-id'], $content_fields['raw-body']);
 198                                 $content_fields['raw-body'] = self::setHashtags($content_fields['raw-body']);
 199
 200                                 if ($item['author-network'] != Protocol::DFRN) {
 201                                         Post\Media::insertFromRelevantUrl($item['uri-id'], $content_fields['raw-body']);
 202                                 }
 203
 204                                 Post\Content::update($item['uri-id'], $content_fields);
 205                         }
 206
 207                         if (!empty($fields['file'])) {
 208                                 Post\Category::storeTextByURIId($item['uri-id'], $item['uid'], $fields['file']);
 209                         }
 210
 211                         if (!empty($fields['attach'])) {
 212                                 Post\Media::insertFromAttachment($item['uri-id'], $fields['attach']);
 213                         }
 214
 215                         // We only need to notfiy others when it is an original entry from us.
 216                         // Only call the notifier when the item had been edited and records had been changed.
 217                         if ($item['origin'] && !empty($fields['edited']) && ($previous['edited'] != $fields['edited'])) {
 218                                 $notify_items[] = $item['id'];
 219                         }
 220                 }
 221
 222                 DBA::close($items);
 223
 224                 foreach ($notify_items as $notify_item) {
 225                         $post = Post::selectFirst(['uri-id', 'uid'], ['id' => $notify_item]);
 226                         Worker::add(PRIORITY_HIGH, "Notifier", Delivery::POST, (int)$post['uri-id'], (int)$post['uid']);
 227                 }
 228
 229                 return $rows;
 230         }
 231
 232         /**
 233          * Delete an item and notify others about it - if it was ours
 234          *
 235          * @param array   $condition The condition for finding the item entries
 236          * @param integer $priority  Priority for the notification
 237          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 238          */
 239         public static function markForDeletion($condition, $priority = PRIORITY_HIGH)
 240         {
 241                 $items = Post::select(['id'], $condition);
 242                 while ($item = Post::fetch($items)) {
 243                         self::markForDeletionById($item['id'], $priority);
 244                 }
 245                 DBA::close($items);
 246         }
 247
 248         /**
 249          * Delete an item for an user and notify others about it - if it was ours
 250          *
 251          * @param array   $condition The condition for finding the item entries
 252          * @param integer $uid       User who wants to delete this item
 253          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 254          */
 255         public static function deleteForUser($condition, $uid)
 256         {
 257                 if ($uid == 0) {
 258                         return;
 259                 }
 260
 261                 $items = Post::select(['id', 'uid', 'uri-id'], $condition);
 262                 while ($item = Post::fetch($items)) {
 263                         if (in_array($item['uid'], [$uid, 0])) {
 264                                 Post\User::update($item['uri-id'], $uid, ['hidden' => true], true);
 265                                 Post\ThreadUser::update($item['uri-id'], $uid, ['hidden' => true], true);
 266                         }
 267
 268                         if ($item['uid'] == $uid) {
 269                                 self::markForDeletionById($item['id'], PRIORITY_HIGH);
 270                         } elseif ($item['uid'] != 0) {
 271                                 Logger::notice('Wrong ownership. Not deleting item', ['id' => $item['id']]);
 272                         }
 273                 }
 274                 DBA::close($items);
 275         }
 276
 277         /**
 278          * Mark an item for deletion, delete related data and notify others about it - if it was ours
 279          *
 280          * @param integer $item_id
 281          * @param integer $priority Priority for the notification
 282          *
 283          * @return boolean success
 284          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 285          */
 286         public static function markForDeletionById($item_id, $priority = PRIORITY_HIGH)
 287         {
 288                 Logger::info('Mark item for deletion by id', ['id' => $item_id, 'callstack' => System::callstack()]);
 289                 // locate item to be deleted
 290                 $fields = ['id', 'uri', 'uri-id', 'uid', 'parent', 'parent-uri-id', 'origin',
 291                         'deleted', 'resource-id', 'event-id',
 292                         'verb', 'object-type', 'object', 'target', 'contact-id', 'psid', 'gravity'];
 293                 $item = Post::selectFirst($fields, ['id' => $item_id]);
 294                 if (!DBA::isResult($item)) {
 295                         Logger::info('Item not found.', ['id' => $item_id]);
 296                         return false;
 297                 }
 298
 299                 if ($item['deleted']) {
 300                         Logger::info('Item has already been marked for deletion.', ['id' => $item_id]);
 301                         return false;
 302                 }
 303
 304                 $parent = Post::selectFirst(['origin'], ['id' => $item['parent']]);
 305                 if (!DBA::isResult($parent)) {
 306                         $parent = ['origin' => false];
 307                 }
 308
 309                 // clean up categories and tags so they don't end up as orphans
 310                 Post\Category::deleteByURIId($item['uri-id'], $item['uid']);
 311
 312                 /*
 313                  * If item is a link to a photo resource, nuke all the associated photos
 314                  * (visitors will not have photo resources)
 315                  * This only applies to photos uploaded from the photos page. Photos inserted into a post do not
 316                  * generate a resource-id and therefore aren't intimately linked to the item.
 317                  */
 318                 /// @TODO: this should first check if photo is used elsewhere
 319                 if (strlen($item['resource-id'])) {
 320                         Photo::delete(['resource-id' => $item['resource-id'], 'uid' => $item['uid']]);
 321                 }
 322
 323                 // If item is a link to an event, delete the event.
 324                 if (intval($item['event-id'])) {
 325                         Event::delete($item['event-id']);
 326                 }
 327
 328                 // If item has attachments, drop them
 329                 $attachments = Post\Media::getByURIId($item['uri-id'], [Post\Media::DOCUMENT]);
 330                 foreach($attachments as $attachment) {
 331                         if (preg_match("|attach/(\d+)|", $attachment['url'], $matches)) {
 332                                 Attach::delete(['id' => $matches[1], 'uid' => $item['uid']]);
 333                         }
 334                 }
 335
 336                 // Set the item to "deleted"
 337                 $item_fields = ['deleted' => true, 'edited' => DateTimeFormat::utcNow(), 'changed' => DateTimeFormat::utcNow()];
 338                 Post::update($item_fields, ['id' => $item['id']]);
 339
 340                 Post\Category::storeTextByURIId($item['uri-id'], $item['uid'], '');
 341
 342                 if (!Post::exists(["`uri-id` = ? AND `uid` != 0 AND NOT `deleted`", $item['uri-id']])) {
 343                         self::markForDeletion(['uri-id' => $item['uri-id'], 'uid' => 0, 'deleted' => false], $priority);
 344                 }
 345
 346                 Post\DeliveryData::delete($item['uri-id']);
 347
 348                 // If it's the parent of a comment thread, kill all the kids
 349                 if ($item['gravity'] == GRAVITY_PARENT) {
 350                         self::markForDeletion(['parent' => $item['parent'], 'deleted' => false], $priority);
 351                 }
 352
 353                 // Is it our comment and/or our thread?
 354                 if (($item['origin'] || $parent['origin']) && ($item['uid'] != 0)) {
 355                         // When we delete the original post we will delete all existing copies on the server as well
 356                         self::markForDeletion(['uri-id' => $item['uri-id'], 'deleted' => false], $priority);
 357
 358                         // send the notification upstream/downstream
 359                         if ($priority) {
 360                                 Worker::add(['priority' => $priority, 'dont_fork' => true], "Notifier", Delivery::DELETION, (int)$item['uri-id'], (int)$item['uid']);
 361                         }
 362                 } elseif ($item['uid'] != 0) {
 363                         Post\User::update($item['uri-id'], $item['uid'], ['hidden' => true]);
 364                         Post\ThreadUser::update($item['uri-id'], $item['uid'], ['hidden' => true]);
 365                 }
 366
 367                 Logger::info('Item has been marked for deletion.', ['id' => $item_id]);
 368
 369                 return true;
 370         }
 371
 372         public static function guid($item, $notify)
 373         {
 374                 if (!empty($item['guid'])) {
 375                         return trim($item['guid']);
 376                 }
 377
 378                 if ($notify) {
 379                         // We have to avoid duplicates. So we create the GUID in form of a hash of the plink or uri.
 380                         // We add the hash of our own host because our host is the original creator of the post.
 381                         $prefix_host = DI::baseUrl()->getHostname();
 382                 } else {
 383                         $prefix_host = '';
 384
 385                         // We are only storing the post so we create a GUID from the original hostname.
 386                         if (!empty($item['author-link'])) {
 387                                 $parsed = parse_url($item['author-link']);
 388                                 if (!empty($parsed['host'])) {
 389                                         $prefix_host = $parsed['host'];
 390                                 }
 391                         }
 392
 393                         if (empty($prefix_host) && !empty($item['plink'])) {
 394                                 $parsed = parse_url($item['plink']);
 395                                 if (!empty($parsed['host'])) {
 396                                         $prefix_host = $parsed['host'];
 397                                 }
 398                         }
 399
 400                         if (empty($prefix_host) && !empty($item['uri'])) {
 401                                 $parsed = parse_url($item['uri']);
 402                                 if (!empty($parsed['host'])) {
 403                                         $prefix_host = $parsed['host'];
 404                                 }
 405                         }
 406
 407                         // Is it in the format data@host.tld? - Used for mail contacts
 408                         if (empty($prefix_host) && !empty($item['author-link']) && strstr($item['author-link'], '@')) {
 409                                 $mailparts = explode('@', $item['author-link']);
 410                                 $prefix_host = array_pop($mailparts);
 411                         }
 412                 }
 413
 414                 if (!empty($item['plink'])) {
 415                         $guid = self::guidFromUri($item['plink'], $prefix_host);
 416                 } elseif (!empty($item['uri'])) {
 417                         $guid = self::guidFromUri($item['uri'], $prefix_host);
 418                 } else {
 419                         $guid = System::createUUID(hash('crc32', $prefix_host));
 420                 }
 421
 422                 return $guid;
 423         }
 424
 425         private static function contactId($item)
 426         {
 427                 if (!empty($item['contact-id']) && DBA::exists('contact', ['self' => true, 'id' => $item['contact-id']])) {
 428                         return $item['contact-id'];
 429                 } elseif (($item['gravity'] == GRAVITY_PARENT) && !empty($item['uid']) && !empty($item['contact-id']) && Contact::isSharing($item['contact-id'], $item['uid'])) {
 430                         return $item['contact-id'];
 431                 } elseif (!empty($item['uid']) && !Contact::isSharing($item['author-id'], $item['uid'])) {
 432                         return $item['author-id'];
 433                 } elseif (!empty($item['contact-id'])) {
 434                         return $item['contact-id'];
 435                 } else {
 436                         $contact_id = Contact::getIdForURL($item['author-link'], $item['uid']);
 437                         if (!empty($contact_id)) {
 438                                 return $contact_id;
 439                         }
 440                 }
 441                 return $item['author-id'];
 442         }
 443
 444         /**
 445          * Write an item array into a spool file to be inserted later.
 446          * This command is called whenever there are issues storing an item.
 447          *
 448          * @param array $item The item fields that are to be inserted
 449          * @throws \Exception
 450          */
 451         private static function spool($orig_item)
 452         {
 453                 // Now we store the data in the spool directory
 454                 // We use "microtime" to keep the arrival order and "mt_rand" to avoid duplicates
 455                 $file = 'item-' . round(microtime(true) * 10000) . '-' . mt_rand() . '.msg';
 456
 457                 $spoolpath = System::getSpoolPath();
 458                 if ($spoolpath != "") {
 459                         $spool = $spoolpath . '/' . $file;
 460
 461                         file_put_contents($spool, json_encode($orig_item));
 462                         Logger::warning("Item wasn't stored - Item was spooled into file", ['file' => $file]);
 463                 }
 464         }
 465
 466         /**
 467          * Check if the item array is a duplicate
 468          *
 469          * @param array $item
 470          * @return boolean is it a duplicate?
 471          */
 472         private static function isDuplicate(array $item)
 473         {
 474                 // Checking if there is already an item with the same guid
 475                 $condition = ['guid' => $item['guid'], 'network' => $item['network'], 'uid' => $item['uid']];
 476                 if (Post::exists($condition)) {
 477                         Logger::notice('Found already existing item', $condition);
 478                         return true;
 479                 }
 480
 481                 $condition = ['uri-id' => $item['uri-id'], 'uid' => $item['uid'],
 482                         'network' => [$item['network'], Protocol::DFRN]];
 483                 if (Post::exists($condition)) {
 484                         Logger::notice('duplicated item with the same uri found.', $condition);
 485                         return true;
 486                 }
 487
 488                 // On Friendica and Diaspora the GUID is unique
 489                 if (in_array($item['network'], [Protocol::DFRN, Protocol::DIASPORA])) {
 490                         $condition = ['guid' => $item['guid'], 'uid' => $item['uid']];
 491                         if (Post::exists($condition)) {
 492                                 Logger::notice('duplicated item with the same guid found.', $condition);
 493                                 return true;
 494                         }
 495                 } elseif ($item['network'] == Protocol::OSTATUS) {
 496                         // Check for an existing post with the same content. There seems to be a problem with OStatus.
 497                         $condition = ["`body` = ? AND `network` = ? AND `created` = ? AND `contact-id` = ? AND `uid` = ?",
 498                                         $item['body'], $item['network'], $item['created'], $item['contact-id'], $item['uid']];
 499                         if (Post::exists($condition)) {
 500                                 Logger::notice('duplicated item with the same body found.', $item);
 501                                 return true;
 502                         }
 503                 }
 504
 505                 /*
 506                  * Check for already added items.
 507                  * There is a timing issue here that sometimes creates double postings.
 508                  * An unique index would help - but the limitations of MySQL (maximum size of index values) prevent this.
 509                  */
 510                 if (($item['uid'] == 0) && Post::exists(['uri-id' => $item['uri-id'], 'uid' => 0])) {
 511                         Logger::notice('Global item already stored.', ['uri-id' => $item['uri-id'], 'network' => $item['network']]);
 512                         return true;
 513                 }
 514
 515                 return false;
 516         }
 517
 518         /**
 519          * Check if the item array is valid
 520          *
 521          * @param array $item
 522          * @return boolean item is valid
 523          */
 524         public static function isValid(array $item)
 525         {
 526                 // When there is no content then we don't post it
 527                 if (($item['body'] . $item['title'] == '') && (empty($item['uri-id']) || !Post\Media::existsByURIId($item['uri-id']))) {
 528                         Logger::notice('No body, no title.');
 529                         return false;
 530                 }
 531
 532                 if (!empty($item['uid'])) {
 533                         $owner = User::getOwnerDataById($item['uid'], false);
 534                         if (!$owner) {
 535                                 Logger::notice('Missing item user owner data', ['uid' => $item['uid']]);
 536                                 return false;
 537                         }
 538
 539                         if ($owner['account_expired'] || $owner['account_removed']) {
 540                                 Logger::notice('Item user has been deleted/expired/removed', ['uid' => $item['uid'], 'deleted' => $owner['deleted'], 'account_expired' => $owner['account_expired'], 'account_removed' => $owner['account_removed']]);
 541                                 return false;
 542                         }
 543                 }
 544
 545                 if (!empty($item['author-id']) && Contact::isBlocked($item['author-id'])) {
 546                         Logger::notice('Author is blocked node-wide', ['author-link' => $item['author-link'], 'item-uri' => $item['uri']]);
 547                         return false;
 548                 }
 549
 550                 if (!empty($item['author-link']) && Network::isUrlBlocked($item['author-link'])) {
 551                         Logger::notice('Author server is blocked', ['author-link' => $item['author-link'], 'item-uri' => $item['uri']]);
 552                         return false;
 553                 }
 554
 555                 if (!empty($item['owner-id']) && Contact::isBlocked($item['owner-id'])) {
 556                         Logger::notice('Owner is blocked node-wide', ['owner-link' => $item['owner-link'], 'item-uri' => $item['uri']]);
 557                         return false;
 558                 }
 559
 560                 if (!empty($item['owner-link']) && Network::isUrlBlocked($item['owner-link'])) {
 561                         Logger::notice('Owner server is blocked', ['owner-link' => $item['owner-link'], 'item-uri' => $item['uri']]);
 562                         return false;
 563                 }
 564
 565                 if (!empty($item['uid']) && !self::isAllowedByUser($item, $item['uid'])) {
 566                         return false;
 567                 }
 568
 569                 if ($item['verb'] == Activity::FOLLOW) {
 570                         if (!$item['origin'] && ($item['author-id'] == Contact::getPublicIdByUserId($item['uid']))) {
 571                                 // Our own follow request can be relayed to us. We don't store it to avoid notification chaos.
 572                                 Logger::info("Follow: Don't store not origin follow request", ['parent-uri' => $item['parent-uri']]);
 573                                 return false;
 574                         }
 575
 576                         $condition = ['verb' => Activity::FOLLOW, 'uid' => $item['uid'],
 577                                 'parent-uri' => $item['parent-uri'], 'author-id' => $item['author-id']];
 578                         if (Post::exists($condition)) {
 579                                 // It happens that we receive multiple follow requests by the same author - we only store one.
 580                                 Logger::info('Follow: Found existing follow request from author', ['author-id' => $item['author-id'], 'parent-uri' => $item['parent-uri']]);
 581                                 return false;
 582                         }
 583                 }
 584
 585                 return true;
 586         }
 587
 588         /**
 589          * Check if the item array is too old
 590          *
 591          * @param array $item
 592          * @return boolean item is too old
 593          */
 594         public static function isTooOld(array $item)
 595         {
 596                 // check for create date and expire time
 597                 $expire_interval = DI::config()->get('system', 'dbclean-expire-days', 0);
 598
 599                 $user = DBA::selectFirst('user', ['expire'], ['uid' => $item['uid']]);
 600                 if (DBA::isResult($user) && ($user['expire'] > 0) && (($user['expire'] < $expire_interval) || ($expire_interval == 0))) {
 601                         $expire_interval = $user['expire'];
 602                 }
 603
 604                 if (($expire_interval > 0) && !empty($item['created'])) {
 605                         $expire_date = time() - ($expire_interval * 86400);
 606                         $created_date = strtotime($item['created']);
 607                         if ($created_date < $expire_date) {
 608                                 Logger::notice('Item created before expiration interval.', [
 609                                         'created' => date('c', $created_date),
 610                                         'expired' => date('c', $expire_date),
 611                                         '$item' => $item
 612                                 ]);
 613                                 return true;
 614                         }
 615                 }
 616
 617                 return false;
 618         }
 619
 620         /**
 621          * Return the id of the given item array if it has been stored before
 622          *
 623          * @param array $item
 624          * @return integer item id
 625          */
 626         private static function getDuplicateID(array $item)
 627         {
 628                 if (empty($item['network']) || in_array($item['network'], Protocol::FEDERATED)) {
 629                         $condition = ["`uri-id` = ? AND `uid` = ? AND `network` IN (?, ?, ?, ?)",
 630                                 $item['uri-id'], $item['uid'],
 631                                 Protocol::ACTIVITYPUB, Protocol::DIASPORA, Protocol::DFRN, Protocol::OSTATUS];
 632                         $existing = Post::selectFirst(['id', 'network'], $condition);
 633                         if (DBA::isResult($existing)) {
 634                                 // We only log the entries with a different user id than 0. Otherwise we would have too many false positives
 635                                 if ($item['uid'] != 0) {
 636                                         Logger::notice('Item already existed for user', [
 637                                                 'uri-id' => $item['uri-id'],
 638                                                 'uid' => $item['uid'],
 639                                                 'network' => $item['network'],
 640                                                 'existing_id' => $existing["id"],
 641                                                 'existing_network' => $existing["network"]
 642                                         ]);
 643                                 }
 644
 645                                 return $existing["id"];
 646                         }
 647                 }
 648                 return 0;
 649         }
 650
 651         /**
 652          * Fetch top-level parent data for the given item array
 653          *
 654          * @param array $item
 655          * @return array item array with parent data
 656          * @throws \Exception
 657          */
 658         private static function getTopLevelParent(array $item)
 659         {
 660                 $fields = ['uid', 'uri', 'parent-uri', 'id', 'deleted',
 661                         'uri-id', 'parent-uri-id',
 662                         'allow_cid', 'allow_gid', 'deny_cid', 'deny_gid',
 663                         'wall', 'private', 'origin', 'author-id'];
 664                 $condition = ['uri-id' => $item['thr-parent-id'], 'uid' => $item['uid']];
 665                 $params = ['order' => ['id' => false]];
 666                 $parent = Post::selectFirst($fields, $condition, $params);
 667
 668                 if (!DBA::isResult($parent) && $item['origin']) {
 669                         $stored = Item::storeForUserByUriId($item['thr-parent-id'], $item['uid']);
 670                         Logger::info('Stored thread parent item for user', ['uri-id' => $item['thr-parent-id'], 'uid' => $item['uid'], 'stored' => $stored]);
 671                         $parent = Post::selectFirst($fields, $condition, $params);
 672                 }
 673
 674                 if (!DBA::isResult($parent)) {
 675                         Logger::notice('item parent was not found - ignoring item', ['thr-parent-id' => $item['thr-parent-id'], 'uid' => $item['uid']]);
 676                         return [];
 677                 }
 678
 679                 if ($parent['uri-id'] == $parent['parent-uri-id']) {
 680                         return $parent;
 681                 }
 682
 683                 $condition = ['uri-id' => $parent['parent-uri-id'],
 684                         'parent-uri-id' => $parent['parent-uri-id'],
 685                         'uid' => $parent['uid']];
 686                 $params = ['order' => ['id' => false]];
 687                 $toplevel_parent = Post::selectFirst($fields, $condition, $params);
 688
 689                 if (!DBA::isResult($toplevel_parent) && $item['origin']) {
 690                         $stored = Item::storeForUserByUriId($item['parent-uri-id'], $item['uid']);
 691                         Logger::info('Stored parent item for user', ['uri-id' => $item['parent-uri-id'], 'uid' => $item['uid'], 'stored' => $stored]);
 692                         $toplevel_parent = Post::selectFirst($fields, $condition, $params);
 693                 }
 694
 695                 if (!DBA::isResult($toplevel_parent)) {
 696                         Logger::notice('item top level parent was not found - ignoring item', ['parent-uri-id' => $parent['parent-uri-id'], 'uid' => $parent['uid']]);
 697                         return [];
 698                 }
 699
 700                 return $toplevel_parent;
 701         }
 702
 703         /**
 704          * Get the gravity for the given item array
 705          *
 706          * @param array $item
 707          * @return integer gravity
 708          */
 709         private static function getGravity(array $item)
 710         {
 711                 $activity = DI::activity();
 712
 713                 if (isset($item['gravity'])) {
 714                         return intval($item['gravity']);
 715                 } elseif ($item['parent-uri-id'] === $item['uri-id']) {
 716                         return GRAVITY_PARENT;
 717                 } elseif ($activity->match($item['verb'], Activity::POST)) {
 718                         return GRAVITY_COMMENT;
 719                 } elseif ($activity->match($item['verb'], Activity::FOLLOW)) {
 720                         return GRAVITY_ACTIVITY;
 721                 } elseif ($activity->match($item['verb'], Activity::ANNOUNCE)) {
 722                         return GRAVITY_ACTIVITY;
 723                 }
 724                 Logger::info('Unknown gravity for verb', ['verb' => $item['verb']]);
 725                 return GRAVITY_UNKNOWN;   // Should not happen
 726         }
 727
 728         public static function insert(array $item, bool $notify = false, bool $post_local = true)
 729         {
 730                 $orig_item = $item;
 731
 732                 $priority = PRIORITY_HIGH;
 733
 734                 // If it is a posting where users should get notifications, then define it as wall posting
 735                 if ($notify) {
 736                         $item['wall'] = 1;
 737                         $item['origin'] = 1;
 738                         $item['network'] = Protocol::DFRN;
 739                         $item['protocol'] = Conversation::PARCEL_DIRECT;
 740                         $item['direction'] = Conversation::PUSH;
 741
 742                         if (in_array($notify, PRIORITIES)) {
 743                                 $priority = $notify;
 744                         }
 745                 } else {
 746                         $item['network'] = trim(($item['network'] ?? '') ?: Protocol::PHANTOM);
 747                 }
 748
 749                 $uid = intval($item['uid']);
 750
 751                 $item['guid'] = self::guid($item, $notify);
 752                 $item['uri'] = substr(trim($item['uri'] ?? '') ?: self::newURI($item['uid'], $item['guid']), 0, 255);
 753
 754                 // Store URI data
 755                 $item['uri-id'] = ItemURI::insert(['uri' => $item['uri'], 'guid' => $item['guid']]);
 756
 757                 // Backward compatibility: parent-uri used to be the direct parent uri.
 758                 // If it is provided without a thr-parent, it probably is the old behavior.
 759                 $item['thr-parent'] = trim($item['thr-parent'] ?? $item['parent-uri'] ?? $item['uri']);
 760                 $item['parent-uri'] = $item['thr-parent'];
 761
 762                 $item['thr-parent-id'] = $item['parent-uri-id'] = ItemURI::getIdByURI($item['thr-parent']);
 763
 764                 // Store conversation data
 765                 $item = Conversation::insert($item);
 766
 767                 /*
 768                  * Do we already have this item?
 769                  * We have to check several networks since Friendica posts could be repeated
 770                  * via OStatus (maybe Diasporsa as well)
 771                  */
 772                 $duplicate = self::getDuplicateID($item);
 773                 if ($duplicate) {
 774                         return $duplicate;
 775                 }
 776
 777                 // Additional duplicate checks
 778                 /// @todo Check why the first duplication check returns the item number and the second a 0
 779                 if (self::isDuplicate($item)) {
 780                         return 0;
 781                 }
 782
 783                 if (!isset($item['post-type'])) {
 784                         $item['post-type'] = empty($item['title']) ? self::PT_NOTE : self::PT_ARTICLE;
 785                 }
 786
 787                 $item['wall']          = intval($item['wall'] ?? 0);
 788                 $item['extid']         = trim($item['extid'] ?? '');
 789                 $item['author-name']   = trim($item['author-name'] ?? '');
 790                 $item['author-link']   = trim($item['author-link'] ?? '');
 791                 $item['author-avatar'] = trim($item['author-avatar'] ?? '');
 792                 $item['owner-name']    = trim($item['owner-name'] ?? '');
 793                 $item['owner-link']    = trim($item['owner-link'] ?? '');
 794                 $item['owner-avatar']  = trim($item['owner-avatar'] ?? '');
 795                 $item['received']      = (isset($item['received'])  ? DateTimeFormat::utc($item['received'])  : DateTimeFormat::utcNow());
 796                 $item['created']       = (isset($item['created'])   ? DateTimeFormat::utc($item['created'])   : $item['received']);
 797                 $item['edited']        = (isset($item['edited'])    ? DateTimeFormat::utc($item['edited'])    : $item['created']);
 798                 $item['changed']       = (isset($item['changed'])   ? DateTimeFormat::utc($item['changed'])   : $item['created']);
 799                 $item['commented']     = (isset($item['commented']) ? DateTimeFormat::utc($item['commented']) : $item['created']);
 800                 $item['title']         = substr(trim($item['title'] ?? ''), 0, 255);
 801                 $item['location']      = trim($item['location'] ?? '');
 802                 $item['coord']         = trim($item['coord'] ?? '');
 803                 $item['visible']       = (isset($item['visible']) ? intval($item['visible']) : 1);
 804                 $item['deleted']       = 0;
 805                 $item['verb']          = trim($item['verb'] ?? '');
 806                 $item['object-type']   = trim($item['object-type'] ?? '');
 807                 $item['object']        = trim($item['object'] ?? '');
 808                 $item['target-type']   = trim($item['target-type'] ?? '');
 809                 $item['target']        = trim($item['target'] ?? '');
 810                 $item['plink']         = substr(trim($item['plink'] ?? ''), 0, 255);
 811                 $item['allow_cid']     = trim($item['allow_cid'] ?? '');
 812                 $item['allow_gid']     = trim($item['allow_gid'] ?? '');
 813                 $item['deny_cid']      = trim($item['deny_cid'] ?? '');
 814                 $item['deny_gid']      = trim($item['deny_gid'] ?? '');
 815                 $item['private']       = intval($item['private'] ?? self::PUBLIC);
 816                 $item['body']          = trim($item['body'] ?? '');
 817                 $item['raw-body']      = trim($item['raw-body'] ?? $item['body']);
 818                 $item['app']           = trim($item['app'] ?? '');
 819                 $item['origin']        = intval($item['origin'] ?? 0);
 820                 $item['postopts']      = trim($item['postopts'] ?? '');
 821                 $item['resource-id']   = trim($item['resource-id'] ?? '');
 822                 $item['event-id']      = intval($item['event-id'] ?? 0);
 823                 $item['inform']        = trim($item['inform'] ?? '');
 824                 $item['file']          = trim($item['file'] ?? '');
 825
 826                 // Communities aren't working with the Diaspora protoccol
 827                 if (($uid != 0) && ($item['network'] == Protocol::DIASPORA)) {
 828                         $user = User::getById($uid, ['account-type']);
 829                         if ($user['account-type'] == Contact::TYPE_COMMUNITY) {
 830                                 Logger::info('Community posts are not supported via Diaspora');
 831                                 return 0;
 832                         }
 833                 }
 834
 835                 // Items cannot be stored before they happen ...
 836                 if ($item['created'] > DateTimeFormat::utcNow()) {
 837                         $item['created'] = DateTimeFormat::utcNow();
 838                 }
 839
 840                 // We haven't invented time travel by now.
 841                 if ($item['edited'] > DateTimeFormat::utcNow()) {
 842                         $item['edited'] = DateTimeFormat::utcNow();
 843                 }
 844
 845                 $item['plink'] = ($item['plink'] ?? '') ?: DI::baseUrl() . '/display/' . urlencode($item['guid']);
 846
 847                 $item['gravity'] = self::getGravity($item);
 848
 849                 $item['language'] = self::getLanguage($item);
 850
 851                 $default = ['url' => $item['author-link'], 'name' => $item['author-name'],
 852                         'photo' => $item['author-avatar'], 'network' => $item['network']];
 853                 $item['author-id'] = ($item['author-id'] ?? 0) ?: Contact::getIdForURL($item['author-link'], 0, null, $default);
 854
 855                 $default = ['url' => $item['owner-link'], 'name' => $item['owner-name'],
 856                         'photo' => $item['owner-avatar'], 'network' => $item['network']];
 857                 $item['owner-id'] = ($item['owner-id'] ?? 0) ?: Contact::getIdForURL($item['owner-link'], 0, null, $default);
 858
 859                 $actor = ($item['gravity'] == GRAVITY_PARENT) ? $item['owner-id'] : $item['author-id'];
 860                 if (!$item['origin'] && ($item['uid'] != 0) && Contact::isSharing($actor, $item['uid'])) {
 861                         $item['post-reason'] = self::PR_FOLLOWER;
 862                 }
 863
 864                 // Ensure that there is an avatar cache
 865                 Contact::checkAvatarCache($item['author-id']);
 866                 Contact::checkAvatarCache($item['owner-id']);
 867
 868                 // The contact-id should be set before "self::insert" was called - but there seems to be issues sometimes
 869                 $item["contact-id"] = self::contactId($item);
 870
 871                 if (!empty($item['direction']) && in_array($item['direction'], [Conversation::PUSH, Conversation::RELAY]) &&
 872                         self::isTooOld($item)) {
 873                         Logger::info('Item is too old', ['item' => $item]);
 874                         return 0;
 875                 }
 876
 877                 if (!self::isValid($item)) {
 878                         return 0;
 879                 }
 880
 881                 if ($item['gravity'] !== GRAVITY_PARENT) {
 882                         $toplevel_parent = self::getTopLevelParent($item);
 883                         if (empty($toplevel_parent)) {
 884                                 return 0;
 885                         }
 886
 887                         // If the thread originated from this node, we check the permission against the thread starter
 888                         $condition = ['uri-id' => $toplevel_parent['uri-id'], 'wall' => true];
 889                         $localTopLevelParent = Post::selectFirst(['uid'], $condition);
 890                         if (!empty($localTopLevelParent['uid']) && !self::isAllowedByUser($item, $localTopLevelParent['uid'])) {
 891                                 return 0;
 892                         }
 893
 894                         $parent_id             = $toplevel_parent['id'];
 895                         $item['parent-uri']    = $toplevel_parent['uri'];
 896                         $item['parent-uri-id'] = $toplevel_parent['uri-id'];
 897                         $item['deleted']       = $toplevel_parent['deleted'];
 898
 899                         // Reshares have to keep their permissions to allow forums to work
 900                         if (!$item['origin'] || ($item['verb'] != Activity::ANNOUNCE)) {
 901                                 $item['allow_cid']     = $toplevel_parent['allow_cid'];
 902                                 $item['allow_gid']     = $toplevel_parent['allow_gid'];
 903                                 $item['deny_cid']      = $toplevel_parent['deny_cid'];
 904                                 $item['deny_gid']      = $toplevel_parent['deny_gid'];
 905                         }
 906
 907                         $parent_origin         = $toplevel_parent['origin'];
 908
 909                         // Don't federate received participation messages
 910                         if ($item['verb'] != Activity::FOLLOW) {
 911                                 $item['wall'] = $toplevel_parent['wall'];
 912                         } else {
 913                                 $item['wall'] = false;
 914                                 // Participations are technical messages, so they are set to "seen" automatically
 915                                 $item['unseen'] = false;
 916                         }
 917
 918                         /*
 919                          * If the parent is private, force privacy for the entire conversation
 920                          * This differs from the above settings as it subtly allows comments from
 921                          * email correspondents to be private even if the overall thread is not.
 922                          */
 923                         if ($toplevel_parent['private']) {
 924                                 $item['private'] = $toplevel_parent['private'];
 925                         }
 926
 927                         // If its a post that originated here then tag the thread as "mention"
 928                         if ($item['origin'] && $item['uid']) {
 929                                 DBA::update('post-thread-user', ['mention' => true], ['uri-id' => $item['parent-uri-id'], 'uid' => $item['uid']]);
 930                                 Logger::info('tagged thread as mention', ['parent' => $parent_id, 'parent-uri-id' => $item['parent-uri-id'], 'uid' => $item['uid']]);
 931                         }
 932
 933                         // Update the contact relations
 934                         Contact\Relation::store($toplevel_parent['author-id'], $item['author-id'], $item['created']);
 935                 } else {
 936                         $parent_id = 0;
 937                         $parent_origin = $item['origin'];
 938                 }
 939
 940                 $item['parent-uri-id'] = ItemURI::getIdByURI($item['parent-uri']);
 941                 $item['thr-parent-id'] = ItemURI::getIdByURI($item['thr-parent']);
 942
 943                 // Is this item available in the global items (with uid=0)?
 944                 if ($item["uid"] == 0) {
 945                         $item["global"] = true;
 946
 947                         // Set the global flag on all items if this was a global item entry
 948                         Post::update(['global' => true], ['uri-id' => $item['uri-id']]);
 949                 } else {
 950                         $item['global'] = Post::exists(['uid' => 0, 'uri-id' => $item['uri-id']]);
 951                 }
 952
 953                 // ACL settings
 954                 if (!empty($item["allow_cid"] . $item["allow_gid"] . $item["deny_cid"] . $item["deny_gid"])) {
 955                         $item["private"] = self::PRIVATE;
 956                 }
 957
 958                 if ($notify && $post_local) {
 959                         $item['edit'] = false;
 960                         $item['parent'] = $parent_id;
 961
 962                         // Trigger automatic reactions for addons
 963                         if (!isset($item['api_source'])) {
 964                                 $item['api_source'] = true;
 965                         }
 966
 967                         // We have to tell the hooks who we are - this really should be improved
 968                         if (!local_user()) {
 969                                 $_SESSION['authenticated'] = true;
 970                                 $_SESSION['uid'] = $uid;
 971                                 $dummy_session = true;
 972                         } else {
 973                                 $dummy_session = false;
 974                         }
 975
 976                         Hook::callAll('post_local', $item);
 977
 978                         if ($dummy_session) {
 979                                 unset($_SESSION['authenticated']);
 980                                 unset($_SESSION['uid']);
 981                         }
 982                 } elseif (!$notify) {
 983                         Hook::callAll('post_remote', $item);
 984                 }
 985
 986                 if (!empty($item['cancel'])) {
 987                         Logger::notice('post cancelled by addon.');
 988                         return 0;
 989                 }
 990
 991                 if (empty($item['vid']) && !empty($item['verb'])) {
 992                         $item['vid'] = Verb::getID($item['verb']);
 993                 }
 994
 995                 // Creates or assigns the permission set
 996                 $item['psid'] = DI::permissionSet()->selectOrCreate(
 997                         DI::permissionSetFactory()->createFromString(
 998                                 $item['uid'],
 999                                 $item['allow_cid'],
1000                                 $item['allow_gid'],
1001                                 $item['deny_cid'],
1002                                 $item['deny_gid']
1003                 ))->id;
1004
1005                 if (!empty($item['extid'])) {
1006                         $item['external-id'] = ItemURI::getIdByURI($item['extid']);
1007                 }
1008
1009                 if ($item['verb'] == Activity::ANNOUNCE) {
1010                         self::setOwnerforResharedItem($item);
1011                 }
1012
1013                 if (isset($item['attachments'])) {
1014                         foreach ($item['attachments'] as $attachment) {
1015                                 $attachment['uri-id'] = $item['uri-id'];
1016                                 Post\Media::insert($attachment);
1017                         }
1018                         unset($item['attachments']);
1019                 }
1020
1021                 Post\Media::insertFromAttachmentData($item['uri-id'], $item['body']);
1022
1023                 // Remove all media attachments from the body and store them in the post-media table
1024                 $item['raw-body'] = Post\Media::insertFromBody($item['uri-id'], $item['raw-body']);
1025                 $item['raw-body'] = self::setHashtags($item['raw-body']);
1026
1027                 if (!DBA::exists('contact', ['id' => $item['author-id'], 'network' => Protocol::DFRN])) {
1028                         Post\Media::insertFromRelevantUrl($item['uri-id'], $item['raw-body']);
1029                 }
1030
1031                 // Check for hashtags in the body and repair or add hashtag links
1032                 $item['body'] = self::setHashtags($item['body']);
1033
1034                 if (stristr($item['verb'], Activity::POKE)) {
1035                         $notify_type = Delivery::POKE;
1036                 } else {
1037                         $notify_type = Delivery::POST;
1038                 }
1039
1040                 // Filling item related side tables
1041                 if (!empty($item['attach'])) {
1042                         Post\Media::insertFromAttachment($item['uri-id'], $item['attach']);
1043                 }
1044
1045                 if (empty($item['event-id'])) {
1046                         unset($item['event-id']);
1047
1048                         $ev = Event::fromBBCode($item['body']);
1049                         if ((!empty($ev['desc']) || !empty($ev['summary'])) && !empty($ev['start'])) {
1050                                 Logger::info('Event found.');
1051                                 $ev['cid']       = $item['contact-id'];
1052                                 $ev['uid']       = $item['uid'];
1053                                 $ev['uri']       = $item['uri'];
1054                                 $ev['edited']    = $item['edited'];
1055                                 $ev['private']   = $item['private'];
1056                                 $ev['guid']      = $item['guid'];
1057                                 $ev['plink']     = $item['plink'];
1058                                 $ev['network']   = $item['network'];
1059                                 $ev['protocol']  = $item['protocol'] ?? Conversation::PARCEL_UNKNOWN;
1060                                 $ev['direction'] = $item['direction'] ?? Conversation::UNKNOWN;
1061                                 $ev['source']    = $item['source'] ?? '';
1062
1063                                 $event = DBA::selectFirst('event', ['id'], ['uri' => $item['uri'], 'uid' => $item['uid']]);
1064                                 if (DBA::isResult($event)) {
1065                                         $ev['id'] = $event['id'];
1066                                 }
1067
1068                                 $event_id = Event::store($ev);
1069                                 $item = Event::getItemArrayForImportedId($event_id, $item);
1070
1071                                 Logger::info('Event was stored', ['id' => $event_id]);
1072                         }
1073                 }
1074
1075                 if (empty($item['causer-id'])) {
1076                         unset($item['causer-id']);
1077                 }
1078
1079                 Post::insert($item['uri-id'], $item);
1080
1081                 if ($item['gravity'] == GRAVITY_PARENT) {
1082                         Post\Thread::insert($item['uri-id'], $item);
1083                 }
1084
1085                 if (!in_array($item['verb'], self::ACTIVITIES)) {
1086                         Post\Content::insert($item['uri-id'], $item);
1087                 }
1088
1089                 // Create Diaspora signature
1090                 if ($item['origin'] && empty($item['diaspora_signed_text']) && ($item['gravity'] != GRAVITY_PARENT)) {
1091                         $signed = Diaspora::createCommentSignature($item);
1092                         if (!empty($signed)) {
1093                                 $item['diaspora_signed_text'] = json_encode($signed);
1094                         }
1095                 }
1096
1097                 if (!empty($item['diaspora_signed_text'])) {
1098                         DBA::replace('diaspora-interaction', ['uri-id' => $item['uri-id'], 'interaction' => $item['diaspora_signed_text']]);
1099                 }
1100
1101                 // Attached file links
1102                 if (!empty($item['file'])) {
1103                         Post\Category::storeTextByURIId($item['uri-id'], $item['uid'], $item['file']);
1104                 }
1105
1106                 // Delivery relevant data
1107                 $delivery_data = Post\DeliveryData::extractFields($item);
1108
1109                 if (!empty($item['origin']) || !empty($item['wall']) || !empty($delivery_data['postopts']) || !empty($delivery_data['inform'])) {
1110                         Post\DeliveryData::insert($item['uri-id'], $delivery_data);
1111                 }
1112
1113                 // Store tags from the body if this hadn't been handled previously in the protocol classes
1114                 if (!Tag::existsForPost($item['uri-id'])) {
1115                         Tag::storeFromBody($item['uri-id'], $item['body']);
1116                 }
1117
1118                 $condition = ['uri-id' => $item['uri-id'], 'uid' => $item['uid']];
1119                 if (Post::exists($condition)) {
1120                         Logger::notice('Item is already inserted - aborting', $condition);
1121                         return 0;
1122                 }
1123
1124                 $post_user_id = Post\User::insert($item['uri-id'], $item['uid'], $item);
1125                 if (!$post_user_id) {
1126                         Logger::notice('Post-User is already inserted - aborting', ['uid' => $item['uid'], 'uri-id' => $item['uri-id']]);
1127                         return 0;
1128                 }
1129
1130                 if ($item['gravity'] == GRAVITY_PARENT) {
1131                         $item['post-user-id'] = $post_user_id;
1132                         Post\ThreadUser::insert($item['uri-id'], $item['uid'], $item);
1133                 }
1134
1135                 Logger::notice('created item', ['post-id' => $post_user_id, 'uid' => $item['uid'], 'network' => $item['network'], 'uri-id' => $item['uri-id'], 'guid' => $item['guid']]);
1136
1137                 $posted_item = Post::selectFirst(self::ITEM_FIELDLIST, ['post-user-id' => $post_user_id]);
1138                 if (!DBA::isResult($posted_item)) {
1139                         // On failure store the data into a spool file so that the "SpoolPost" worker can try again later.
1140                         Logger::warning('Could not store item. it will be spooled', ['id' => $post_user_id]);
1141                         self::spool($orig_item);
1142                         return 0;
1143                 }
1144
1145                 // update the commented timestamp on the parent
1146                 if (DI::config()->get('system', 'like_no_comment')) {
1147                         // Update when it is a comment
1148                         $update_commented = in_array($posted_item['gravity'], [GRAVITY_PARENT, GRAVITY_COMMENT]);
1149                 } else {
1150                         // Update when it isn't a follow or tag verb
1151                         $update_commented = !in_array($posted_item['verb'], [Activity::FOLLOW, Activity::TAG]);
1152                 }
1153
1154                 if ($update_commented) {
1155                         $fields = ['commented' => DateTimeFormat::utcNow(), 'changed' => DateTimeFormat::utcNow()];
1156                 } else {
1157                         $fields = ['changed' => DateTimeFormat::utcNow()];
1158                 }
1159
1160                 Post::update($fields, ['uri-id' => $posted_item['parent-uri-id'], 'uid' => $posted_item['uid']]);
1161
1162                 // In that function we check if this is a forum post. Additionally we delete the item under certain circumstances
1163                 if (self::tagDeliver($posted_item['uid'], $post_user_id)) {
1164                         // Get the user information for the logging
1165                         $user = User::getById($uid);
1166
1167                         Logger::notice('Item had been deleted', ['id' => $post_user_id, 'user' => $uid, 'account-type' => $user['account-type']]);
1168                         return 0;
1169                 }
1170
1171                 if ($notify) {
1172                         if (!\Friendica\Content\Feature::isEnabled($posted_item['uid'], 'explicit_mentions') && ($posted_item['gravity'] == GRAVITY_COMMENT)) {
1173                                 Tag::createImplicitMentions($posted_item['uri-id'], $posted_item['thr-parent-id']);
1174                         }
1175                         Hook::callAll('post_local_end', $posted_item);
1176                 } else {
1177                         Hook::callAll('post_remote_end', $posted_item);
1178                 }
1179
1180                 if ($posted_item['gravity'] === GRAVITY_PARENT) {
1181                         self::addShadow($post_user_id);
1182                 } else {
1183                         self::addShadowPost($post_user_id);
1184                 }
1185
1186                 self::updateContact($posted_item);
1187
1188                 Post\UserNotification::setNotification($posted_item['uri-id'], $posted_item['uid']);
1189
1190                 // Distribute items to users who subscribed to their tags
1191                 self::distributeByTags($posted_item);
1192
1193                 // Automatically reshare the item if the "remote_self" option is selected
1194                 self::autoReshare($posted_item);
1195
1196                 $transmit = $notify || ($posted_item['visible'] && ($parent_origin || $posted_item['origin']));
1197
1198                 if ($transmit) {
1199                         // Don't relay participation messages
1200                         if (($posted_item['verb'] == Activity::FOLLOW) &&
1201                                 (!$posted_item['origin'] || ($posted_item['author-id'] != Contact::getPublicIdByUserId($uid)))) {
1202                                 Logger::info('Participation messages will not be relayed', ['item' => $posted_item['id'], 'uri' => $posted_item['uri'], 'verb' => $posted_item['verb']]);
1203                                 $transmit = false;
1204                         }
1205                 }
1206
1207                 if ($transmit) {
1208                         Worker::add(['priority' => $priority, 'dont_fork' => true], 'Notifier', $notify_type, (int)$posted_item['uri-id'], (int)$posted_item['uid']);
1209                 }
1210
1211                 return $post_user_id;
1212         }
1213
1214         /**
1215          * Change the owner of a parent item if it had been shared by a forum
1216          *
1217          * (public) forum posts in the new format consist of the regular post by the author
1218          * followed by an announce message sent from the forum account.
1219          * Changing the owner helps in grouping forum posts.
1220          *
1221          * @param array $item
1222          * @return void
1223          */
1224         private static function setOwnerforResharedItem(array $item)
1225         {
1226                 $parent = Post::selectFirst(['id', 'causer-id', 'owner-id', 'author-id', 'author-link', 'origin', 'post-reason'],
1227                         ['uri-id' => $item['thr-parent-id'], 'uid' => $item['uid']]);
1228                 if (!DBA::isResult($parent)) {
1229                         Logger::error('Parent not found', ['uri-id' => $item['thr-parent-id'], 'uid' => $item['uid']]);
1230                         return;
1231                 }
1232
1233                 $author = Contact::selectFirst(['url', 'contact-type', 'network'], ['id' => $item['author-id']]);
1234                 if (!DBA::isResult($author)) {
1235                         Logger::error('Author not found', ['id' => $item['author-id']]);
1236                         return;
1237                 }
1238
1239                 $self = Contact::selectFirst(['id'], ['uid' => $item['uid'], 'self' => true]);
1240                 $cid = Contact::getIdForURL($author['url'], $item['uid']);
1241                 if (empty($cid) || (!Contact::isSharing($cid, $item['uid']) && ($cid != $self['id']))) {
1242                         Logger::info('The resharer is not a following contact: quit', ['resharer' => $author['url'], 'uid' => $item['uid'], 'cid' => $cid]);
1243                         return;
1244                 }
1245
1246                 if ($author['contact-type'] != Contact::TYPE_COMMUNITY) {
1247                         if ($parent['post-reason'] == self::PR_ANNOUNCEMENT) {
1248                                 Logger::info('The parent is already marked as announced: quit', ['causer' => $parent['causer-id'], 'owner' => $parent['owner-id'], 'author' => $parent['author-id'], 'uid' => $item['uid']]);
1249                                 return;
1250                         }
1251
1252                         if (Contact::isSharing($parent['owner-id'], $item['uid'])) {
1253                                 Logger::info('The resharer is no forum: quit', ['resharer' => $item['author-id'], 'owner' => $parent['owner-id'], 'author' => $parent['author-id'], 'uid' => $item['uid']]);
1254                                 return;
1255                         }
1256                 }
1257
1258                 self::update(['post-reason' => self::PR_ANNOUNCEMENT, 'causer-id' => $item['author-id']], ['id' => $parent['id']]);
1259                 Logger::info('Set announcement post-reason', ['uri-id' => $item['uri-id'], 'thr-parent-id' => $item['thr-parent-id'], 'uid' => $item['uid']]);
1260         }
1261
1262         /**
1263          * Distribute the given item to users who subscribed to their tags
1264          *
1265          * @param array $item     Processed item
1266          */
1267         private static function distributeByTags(array $item)
1268         {
1269                 if (($item['uid'] != 0) || ($item['gravity'] != GRAVITY_PARENT) || !in_array($item['network'], Protocol::FEDERATED)) {
1270                         return;
1271                 }
1272
1273                 $uids = Tag::getUIDListByURIId($item['uri-id']);
1274                 foreach ($uids as $uid) {
1275                         if (Contact::isSharing($item['author-id'], $uid)) {
1276                                 $fields = [];
1277                         } else {
1278                                 $fields = ['post-reason' => self::PR_TAG];
1279                         }
1280
1281                         $stored = self::storeForUserByUriId($item['uri-id'], $uid, $fields);
1282                         Logger::info('Stored item for users', ['uri-id' => $item['uri-id'], 'uid' => $uid, 'fields' => $fields, 'stored' => $stored]);
1283                 }
1284         }
1285
1286         /**
1287          * Distributes public items to the receivers
1288          *
1289          * @param integer $itemid      Item ID that should be added
1290          * @param string  $signed_text Original text (for Diaspora signatures), JSON encoded.
1291          * @throws \Exception
1292          */
1293         public static function distribute($itemid, $signed_text = '')
1294         {
1295                 $condition = ["`id` IN (SELECT `parent` FROM `post-user-view` WHERE `id` = ?)", $itemid];
1296                 $parent = Post::selectFirst(['owner-id'], $condition);
1297                 if (!DBA::isResult($parent)) {
1298                         Logger::warning('Item not found', ['condition' => $condition]);
1299                         return;
1300                 }
1301
1302                 // Only distribute public items from native networks
1303                 $condition = ['id' => $itemid, 'uid' => 0,
1304                         'network' => array_merge(Protocol::FEDERATED ,['']),
1305                         'visible' => true, 'deleted' => false, 'private' => [self::PUBLIC, self::UNLISTED]];
1306                 $item = Post::selectFirst(self::ITEM_FIELDLIST, $condition);
1307                 if (!DBA::isResult($item)) {
1308                         Logger::warning('Item not found', ['condition' => $condition]);
1309                         return;
1310                 }
1311
1312                 $origin = $item['origin'];
1313
1314                 $users = [];
1315
1316                 /// @todo add a field "pcid" in the contact table that referrs to the public contact id.
1317                 $owner = DBA::selectFirst('contact', ['url', 'nurl', 'alias'], ['id' => $parent['owner-id']]);
1318                 if (!DBA::isResult($owner)) {
1319                         return;
1320                 }
1321
1322                 $condition = ['nurl' => $owner['nurl'], 'rel' => [Contact::SHARING, Contact::FRIEND]];
1323                 $contacts = DBA::select('contact', ['uid'], $condition);
1324                 while ($contact = DBA::fetch($contacts)) {
1325                         if ($contact['uid'] == 0) {
1326                                 continue;
1327                         }
1328
1329                         $users[$contact['uid']] = $contact['uid'];
1330                 }
1331                 DBA::close($contacts);
1332
1333                 $condition = ['alias' => $owner['url'], 'rel' => [Contact::SHARING, Contact::FRIEND]];
1334                 $contacts = DBA::select('contact', ['uid'], $condition);
1335                 while ($contact = DBA::fetch($contacts)) {
1336                         if ($contact['uid'] == 0) {
1337                                 continue;
1338                         }
1339
1340                         $users[$contact['uid']] = $contact['uid'];
1341                 }
1342                 DBA::close($contacts);
1343
1344                 if (!empty($owner['alias'])) {
1345                         $condition = ['nurl' => Strings::normaliseLink($owner['alias']), 'rel' => [Contact::SHARING, Contact::FRIEND]];
1346                         $contacts = DBA::select('contact', ['uid'], $condition);
1347                         while ($contact = DBA::fetch($contacts)) {
1348                                 if ($contact['uid'] == 0) {
1349                                         continue;
1350                                 }
1351
1352                                 $users[$contact['uid']] = $contact['uid'];
1353                         }
1354                         DBA::close($contacts);
1355                 }
1356
1357                 $origin_uid = 0;
1358
1359                 if ($item['uri-id'] != $item['parent-uri-id']) {
1360                         $parents = Post::select(['uid', 'origin'], ["`uri-id` = ? AND `uid` != 0", $item['parent-uri-id']]);
1361                         while ($parent = Post::fetch($parents)) {
1362                                 $users[$parent['uid']] = $parent['uid'];
1363                                 if ($parent['origin'] && !$origin) {
1364                                         $origin_uid = $parent['uid'];
1365                                 }
1366                         }
1367                         DBA::close($parents);
1368                 }
1369
1370                 foreach ($users as $uid) {
1371                         if ($origin_uid == $uid) {
1372                                 $item['diaspora_signed_text'] = $signed_text;
1373                         }
1374                         self::storeForUser($item, $uid);
1375                 }
1376         }
1377
1378         /**
1379          * Store a public item defined by their URI-ID for the given users
1380          *
1381          * @param integer $uri_id     URI-ID of the given item
1382          * @param integer $uid        The user that will receive the item entry
1383          * @param array   $fields     Additional fields to be stored
1384          * @param integer $source_uid User id of the source post
1385          * @return integer stored item id
1386          */
1387         public static function storeForUserByUriId(int $uri_id, int $uid, array $fields = [], int $source_uid = 0)
1388         {
1389                 if ($uid == $source_uid) {
1390                         Logger::warning('target UID must not be be equal to the source UID', ['uri-id' => $uri_id, 'uid' => $uid]);
1391                         return 0;
1392                 }
1393
1394                 $item = Post::selectFirst(self::ITEM_FIELDLIST, ['uri-id' => $uri_id, 'uid' => $source_uid]);
1395                 if (!DBA::isResult($item)) {
1396                         Logger::warning('Item could not be fetched', ['uri-id' => $uri_id, 'uid' => $source_uid]);
1397                         return 0;
1398                 }
1399
1400                 if (($source_uid == 0) && (($item['private'] == self::PRIVATE) || !in_array($item['network'], Protocol::FEDERATED))) {
1401                         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']]);
1402                         return 0;
1403                 }
1404
1405                 $item['post-reason'] = self::PR_STORED;
1406
1407                 $item = array_merge($item, $fields);
1408
1409                 $is_reshare = ($item['gravity'] == GRAVITY_ACTIVITY) && ($item['verb'] == Activity::ANNOUNCE);
1410
1411                 if ((($item['gravity'] == GRAVITY_PARENT) || $is_reshare) &&
1412                         DI::pConfig()->get($uid, 'system', 'accept_only_sharer') === self::COMPLETION_NONE &&
1413                         !Contact::isSharingByURL($item['author-link'], $uid) &&
1414                         !Contact::isSharingByURL($item['owner-link'], $uid)) {
1415                         Logger::info('Contact is not a follower, thread will not be stored', ['author' => $item['author-link'], 'uid' => $uid]);
1416                         return 0;
1417                 }
1418
1419                 if ((($item['gravity'] == GRAVITY_COMMENT) || $is_reshare) && !Post::exists(['uri-id' => $item['thr-parent-id'], 'uid' => $uid])) {
1420                         // Fetch the origin user for the post
1421                         $origin_uid = self::GetOriginUidForUriId($item['thr-parent-id'], $uid);
1422                         if (is_null($origin_uid)) {
1423                                 Logger::info('Origin item was not found', ['uid' => $uid, 'uri-id' => $item['thr-parent-id']]);
1424                                 return 0;
1425                         }
1426
1427                         $causer = $item['causer-id'] ?: $item['author-id'];
1428                         $result = self::storeForUserByUriId($item['thr-parent-id'], $uid, ['causer-id' => $causer, 'post-reason' => self::PR_FETCHED], $origin_uid);
1429                         Logger::info('Fetched thread parent', ['uri-id' => $item['thr-parent-id'], 'uid' => $uid, 'causer' => $causer, 'result' => $result]);
1430                 }
1431
1432                 $stored = self::storeForUser($item, $uid);
1433                 Logger::info('Item stored for user', ['uri-id' => $item['uri-id'], 'uid' => $uid, 'source-uid' => $source_uid, 'stored' => $stored]);
1434                 return $stored;
1435         }
1436
1437         /**
1438          * Returns the origin uid of a post if the given user is allowed to see it.
1439          *
1440          * @param int $uriid
1441          * @param int $uid
1442          * @return int
1443          */
1444         private static function GetOriginUidForUriId(int $uriid, int $uid)
1445         {
1446                 if (Post::exists(['uri-id' => $uriid, 'uid' => $uid])) {
1447                         return $uid;
1448                 }
1449
1450                 $post = Post::selectFirst(['uid', 'allow_cid', 'allow_gid', 'deny_cid', 'deny_gid', 'private'], ['uri-id' => $uriid, 'origin' => true]);
1451                 if (!empty($post)) {
1452                         if (in_array($post['private'], [Item::PUBLIC, Item::UNLISTED])) {
1453                                 return $post['uid'];
1454                         }
1455
1456                         $pcid = Contact::getPublicIdByUserId($uid);
1457                         if (empty($pcid)) {
1458                                 return null;
1459                         }
1460
1461                         foreach (Item::enumeratePermissions($post, true) as $receiver) {
1462                                 if ($receiver == $pcid) {
1463                                         return $post['uid'];
1464                                 }
1465                         }
1466
1467                         return null;
1468                 }
1469
1470                 if (Post::exists(['uri-id' => $uriid, 'uid' => 0])) {
1471                         return 0;
1472                 }
1473
1474                 // When the post belongs to a a forum then all forum users are allowed to access it
1475                 foreach (Tag::getByURIId($uriid, [Tag::EXCLUSIVE_MENTION]) as $tag) {
1476                         if (DBA::exists('contact', ['uid' => $uid, 'nurl' => Strings::normaliseLink($tag['url']), 'contact-type' => Contact::TYPE_COMMUNITY])) {
1477                                 $target_uid = User::getIdForURL($tag['url']);
1478                                 if (!empty($target_uid)) {
1479                                         return $target_uid;
1480                                 }
1481                         }
1482                 }
1483
1484                 return null;
1485         }
1486
1487         /**
1488          * Store a public item array for the given users
1489          *
1490          * @param array   $item   The item entry that will be stored
1491          * @param integer $uid    The user that will receive the item entry
1492          * @return integer stored item id
1493          * @throws \Exception
1494          */
1495         private static function storeForUser(array $item, int $uid)
1496         {
1497                 if (Post::exists(['uri-id' => $item['uri-id'], 'uid' => $uid])) {
1498                         if (!empty($item['event-id'])) {
1499                                 $post = Post::selectFirst(['event-id'], ['uri-id' => $item['uri-id'], 'uid' => $uid]);
1500                                 if (!empty($post['event-id'])) {
1501                                         $event = DBA::selectFirst('event', ['edited', 'start', 'finish', 'summary', 'desc', 'location', 'nofinish', 'adjust'], ['id' => $item['event-id']]);
1502                                         if (!empty($event)) {
1503                                                 // We aren't using "Event::store" here, since we don't want to trigger any further action
1504                                                 $ret = DBA::update('event', $event, ['id' => $post['event-id']]);
1505                                                 Logger::info('Event updated', ['uid' => $uid, 'source-event' => $item['event-id'], 'target-event' => $post['event-id'], 'ret' => $ret]);
1506                                         }
1507                                 }
1508                         }
1509                         Logger::info('Item already exists', ['uri-id' => $item['uri-id'], 'uid' => $uid]);
1510                         return 0;
1511                 }
1512
1513                 // Data from the "post-user" table
1514                 unset($item['id']);
1515                 unset($item['mention']);
1516                 unset($item['starred']);
1517                 unset($item['unseen']);
1518                 unset($item['psid']);
1519                 unset($item['pinned']);
1520                 unset($item['ignored']);
1521                 unset($item['pubmail']);
1522                 unset($item['event-id']);
1523                 unset($item['hidden']);
1524                 unset($item['notification-type']);
1525                 unset($item['post-reason']);
1526
1527                 // Data from the "post-delivery-data" table
1528                 unset($item['postopts']);
1529                 unset($item['inform']);
1530
1531                 $item['uid'] = $uid;
1532                 $item['origin'] = 0;
1533                 $item['wall'] = 0;
1534
1535                 if ($item['gravity'] == GRAVITY_PARENT) {
1536                         $contact = Contact::getByURLForUser($item['owner-link'], $uid, false, ['id']);
1537                 } else {
1538                         $contact = Contact::getByURLForUser($item['author-link'], $uid, false, ['id']);
1539                 }
1540
1541                 if (!empty($contact['id'])) {
1542                         $item['contact-id'] = $contact['id'];
1543                 } else {
1544                         // Shouldn't happen at all
1545                         Logger::warning('contact-id could not be fetched', ['uid' => $uid, 'item' => $item]);
1546                         $self = DBA::selectFirst('contact', ['id'], ['self' => true, 'uid' => $uid]);
1547                         if (!DBA::isResult($self)) {
1548                                 // Shouldn't happen even less
1549                                 Logger::warning('self contact could not be fetched', ['uid' => $uid, 'item' => $item]);
1550                                 return 0;
1551                         }
1552                         $item['contact-id'] = $self['id'];
1553                 }
1554
1555                 $notify = false;
1556                 if ($item['gravity'] == GRAVITY_PARENT) {
1557                         $contact = DBA::selectFirst('contact', [], ['id' => $item['contact-id'], 'self' => false]);
1558                         if (DBA::isResult($contact)) {
1559                                 $notify = self::isRemoteSelf($contact, $item);
1560                         }
1561                 }
1562
1563                 $distributed = self::insert($item, $notify);
1564
1565                 if (!$distributed) {
1566                         Logger::info("Distributed item wasn't stored", ['uri-id' => $item['uri-id'], 'user' => $uid]);
1567                 } else {
1568                         Logger::info('Distributed item was stored', ['uri-id' => $item['uri-id'], 'user' => $uid, 'stored' => $distributed]);
1569                 }
1570                 return $distributed;
1571         }
1572
1573         /**
1574          * Add a shadow entry for a given item id that is a thread starter
1575          *
1576          * We store every public item entry additionally with the user id "0".
1577          * This is used for the community page and for the search.
1578          * It is planned that in the future we will store public item entries only once.
1579          *
1580          * @param integer $itemid Item ID that should be added
1581          * @throws \Exception
1582          */
1583         private static function addShadow($itemid)
1584         {
1585                 $fields = ['uid', 'private', 'visible', 'deleted', 'network', 'uri-id'];
1586                 $condition = ['id' => $itemid, 'gravity' => GRAVITY_PARENT];
1587                 $item = Post::selectFirst($fields, $condition);
1588
1589                 if (!DBA::isResult($item)) {
1590                         return;
1591                 }
1592
1593                 // is it already a copy?
1594                 if (($itemid == 0) || ($item['uid'] == 0)) {
1595                         return;
1596                 }
1597
1598                 // Is it a visible public post?
1599                 if (!$item["visible"] || $item["deleted"]  || ($item["private"] == self::PRIVATE)) {
1600                         return;
1601                 }
1602
1603                 // is it an entry from a connector? Only add an entry for natively connected networks
1604                 if (!in_array($item["network"], array_merge(Protocol::FEDERATED ,['']))) {
1605                         return;
1606                 }
1607
1608                 if (Post::exists(['uri-id' => $item['uri-id'], 'uid' => 0])) {
1609                         return;
1610                 }
1611
1612                 $item = Post::selectFirst(self::ITEM_FIELDLIST, ['id' => $itemid]);
1613
1614                 if (DBA::isResult($item)) {
1615                         // Preparing public shadow (removing user specific data)
1616                         $item['uid'] = 0;
1617                         unset($item['id']);
1618                         unset($item['parent']);
1619                         unset($item['wall']);
1620                         unset($item['mention']);
1621                         unset($item['origin']);
1622                         unset($item['starred']);
1623                         unset($item['postopts']);
1624                         unset($item['inform']);
1625                         unset($item['post-reason']);
1626                         if ($item['uri-id'] == $item['parent-uri-id']) {
1627                                 $item['contact-id'] = $item['owner-id'];
1628                         } else {
1629                                 $item['contact-id'] = $item['author-id'];
1630                         }
1631
1632                         $public_shadow = self::insert($item);
1633
1634                         Logger::info('Stored public shadow', ['thread' => $itemid, 'id' => $public_shadow]);
1635                 }
1636         }
1637
1638         /**
1639          * Add a shadow entry for a given item id that is a comment
1640          *
1641          * This function does the same like the function above - but for comments
1642          *
1643          * @param integer $itemid Item ID that should be added
1644          * @throws \Exception
1645          */
1646         private static function addShadowPost($itemid)
1647         {
1648                 $item = Post::selectFirst(self::ITEM_FIELDLIST, ['id' => $itemid]);
1649                 if (!DBA::isResult($item)) {
1650                         return;
1651                 }
1652
1653                 // Is it a toplevel post?
1654                 if ($item['gravity'] == GRAVITY_PARENT) {
1655                         self::addShadow($itemid);
1656                         return;
1657                 }
1658
1659                 // Is this a shadow entry?
1660                 if ($item['uid'] == 0) {
1661                         return;
1662                 }
1663
1664                 // Is there a shadow parent?
1665                 if (!Post::exists(['uri-id' => $item['parent-uri-id'], 'uid' => 0])) {
1666                         return;
1667                 }
1668
1669                 // Is there already a shadow entry?
1670                 if (Post::exists(['uri-id' => $item['uri-id'], 'uid' => 0])) {
1671                         return;
1672                 }
1673
1674                 // Save "origin" and "parent" state
1675                 $origin = $item['origin'];
1676                 $parent = $item['parent'];
1677
1678                 // Preparing public shadow (removing user specific data)
1679                 $item['uid'] = 0;
1680                 unset($item['id']);
1681                 unset($item['parent']);
1682                 unset($item['wall']);
1683                 unset($item['mention']);
1684                 unset($item['origin']);
1685                 unset($item['starred']);
1686                 unset($item['postopts']);
1687                 unset($item['inform']);
1688                 unset($item['post-reason']);
1689                 $item['contact-id'] = Contact::getIdForURL($item['author-link']);
1690
1691                 $public_shadow = self::insert($item);
1692
1693                 Logger::info('Stored public shadow', ['uri-id' => $item['uri-id'], 'id' => $public_shadow]);
1694
1695                 // If this was a comment to a Diaspora post we don't get our comment back.
1696                 // This means that we have to distribute the comment by ourselves.
1697                 if ($origin && Post::exists(['id' => $parent, 'network' => Protocol::DIASPORA])) {
1698                         self::distribute($public_shadow);
1699                 }
1700         }
1701
1702         /**
1703          * Adds a language specification in a "language" element of given $arr.
1704          * Expects "body" element to exist in $arr.
1705          *
1706          * @param array $item
1707          * @return string detected language
1708          * @throws \Text_LanguageDetect_Exception
1709          */
1710         private static function getLanguage(array $item)
1711         {
1712                 if (!empty($item['language'])) {
1713                         return $item['language'];
1714                 }
1715
1716                 if (!in_array($item['gravity'], [GRAVITY_PARENT, GRAVITY_COMMENT]) || empty($item['body'])) {
1717                         return '';
1718                 }
1719
1720                 // Convert attachments to links
1721                 $naked_body = BBCode::removeAttachment($item['body']);
1722                 if (empty($naked_body)) {
1723                         return '';
1724                 }
1725
1726                 // Remove links and pictures
1727                 $naked_body = BBCode::removeLinks($naked_body);
1728
1729                 // Convert the title and the body to plain text
1730                 $naked_body = trim($item['title'] . "\n" . BBCode::toPlaintext($naked_body));
1731
1732                 // Remove possibly remaining links
1733                 $naked_body = preg_replace(Strings::autoLinkRegEx(), '', $naked_body);
1734
1735                 if (empty($naked_body)) {
1736                         return '';
1737                 }
1738
1739                 $availableLanguages = DI::l10n()->getAvailableLanguages();
1740                 // See https://github.com/friendica/friendica/issues/10511
1741                 // Persian is manually added to language detection until a persian translation is provided for the interface, at
1742                 // which point it will be automatically available through `getAvailableLanguages()` and this should be removed.
1743                 $availableLanguages['fa'] = 'fa';
1744
1745                 $ld = new Language($availableLanguages);
1746                 $languages = $ld->detect($naked_body)->limit(0, 3)->close();
1747                 if (is_array($languages)) {
1748                         return json_encode($languages);
1749                 }
1750
1751                 return '';
1752         }
1753
1754         public static function getLanguageMessage(array $item)
1755         {
1756                 $iso639 = new \Matriphe\ISO639\ISO639;
1757
1758                 $used_languages = '';
1759                 foreach (json_decode($item['language'], true) as $language => $reliability) {
1760                         $used_languages .= $iso639->languageByCode1($language) . ' (' . $language . "): " . number_format($reliability, 5) . '\n';
1761                 }
1762                 $used_languages = DI::l10n()->t('Detected languages in this post:\n%s', $used_languages);
1763                 return $used_languages;
1764         }
1765
1766         /**
1767          * Creates an unique guid out of a given uri
1768          *
1769          * @param string $uri uri of an item entry
1770          * @param string $host hostname for the GUID prefix
1771          * @return string unique guid
1772          */
1773         public static function guidFromUri($uri, $host)
1774         {
1775                 // Our regular guid routine is using this kind of prefix as well
1776                 // We have to avoid that different routines could accidentally create the same value
1777                 $parsed = parse_url($uri);
1778
1779                 // We use a hash of the hostname as prefix for the guid
1780                 $guid_prefix = hash("crc32", $host);
1781
1782                 // Remove the scheme to make sure that "https" and "http" doesn't make a difference
1783                 unset($parsed["scheme"]);
1784
1785                 // Glue it together to be able to make a hash from it
1786                 $host_id = implode("/", $parsed);
1787
1788                 // We could use any hash algorithm since it isn't a security issue
1789                 $host_hash = hash("ripemd128", $host_id);
1790
1791                 return $guid_prefix.$host_hash;
1792         }
1793
1794         /**
1795          * generate an unique URI
1796          *
1797          * @param integer $uid  User id
1798          * @param string  $guid An existing GUID (Otherwise it will be generated)
1799          *
1800          * @return string
1801          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1802          */
1803         public static function newURI($uid, $guid = "")
1804         {
1805                 if ($guid == "") {
1806                         $guid = System::createUUID();
1807                 }
1808
1809                 return DI::baseUrl()->get() . '/objects/' . $guid;
1810         }
1811
1812         /**
1813          * Set "success_update" and "last-item" to the date of the last time we heard from this contact
1814          *
1815          * This can be used to filter for inactive contacts.
1816          * Only do this for public postings to avoid privacy problems, since poco data is public.
1817          * Don't set this value if it isn't from the owner (could be an author that we don't know)
1818          *
1819          * @param array $arr Contains the just posted item record
1820          * @throws \Exception
1821          */
1822         private static function updateContact($arr)
1823         {
1824                 // Unarchive the author
1825                 $contact = DBA::selectFirst('contact', [], ['id' => $arr["author-id"]]);
1826                 if (DBA::isResult($contact)) {
1827                         Contact::unmarkForArchival($contact);
1828                 }
1829
1830                 // Unarchive the contact if it's not our own contact
1831                 $contact = DBA::selectFirst('contact', [], ['id' => $arr["contact-id"], 'self' => false]);
1832                 if (DBA::isResult($contact)) {
1833                         Contact::unmarkForArchival($contact);
1834                 }
1835
1836                 /// @todo On private posts we could obfuscate the date
1837                 $update = ($arr['private'] != self::PRIVATE) || in_array($arr['network'], Protocol::FEDERATED);
1838
1839                 // Is it a forum? Then we don't care about the rules from above
1840                 if (!$update && in_array($arr["network"], [Protocol::ACTIVITYPUB, Protocol::DFRN]) && ($arr["parent-uri-id"] === $arr["uri-id"])) {
1841                         if (DBA::exists('contact', ['id' => $arr['contact-id'], 'forum' => true])) {
1842                                 $update = true;
1843                         }
1844                 }
1845
1846                 if ($update) {
1847                         // The "self" contact id is used (for example in the connectors) when the contact is unknown
1848                         // So we have to ensure to only update the last item when it had been our own post,
1849                         // or it had been done by a "regular" contact.
1850                         if (!empty($arr['wall'])) {
1851                                 $condition = ['id' => $arr['contact-id']];
1852                         } else {
1853                                 $condition = ['id' => $arr['contact-id'], 'self' => false];
1854                         }
1855                         Contact::update(['failed' => false, 'success_update' => $arr['received'], 'last-item' => $arr['received']], $condition);
1856                 }
1857                 // Now do the same for the system wide contacts with uid=0
1858                 if ($arr['private'] != self::PRIVATE) {
1859                         Contact::update(['failed' => false, 'success_update' => $arr['received'], 'last-item' => $arr['received']],
1860                                 ['id' => $arr['owner-id']]);
1861
1862                         if ($arr['owner-id'] != $arr['author-id']) {
1863                                 Contact::update(['failed' => false, 'success_update' => $arr['received'], 'last-item' => $arr['received']],
1864                                         ['id' => $arr['author-id']]);
1865                         }
1866                 }
1867         }
1868
1869         public static function setHashtags($body)
1870         {
1871                 $body = BBCode::performWithEscapedTags($body, ['noparse', 'pre', 'code', 'img'], function ($body) {
1872                         $tags = BBCode::getTags($body);
1873
1874                         // No hashtags?
1875                         if (!count($tags)) {
1876                                 return $body;
1877                         }
1878
1879                         // This sorting is important when there are hashtags that are part of other hashtags
1880                         // Otherwise there could be problems with hashtags like #test and #test2
1881                         // Because of this we are sorting from the longest to the shortest tag.
1882                         usort($tags, function ($a, $b) {
1883                                 return strlen($b) <=> strlen($a);
1884                         });
1885
1886                         $URLSearchString = "^\[\]";
1887
1888                         // All hashtags should point to the home server if "local_tags" is activated
1889                         if (DI::config()->get('system', 'local_tags')) {
1890                                 $body = preg_replace("/#\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",
1891                                         "#[url=" . DI::baseUrl() . "/search?tag=$2]$2[/url]", $body);
1892                         }
1893
1894                         // mask hashtags inside of url, bookmarks and attachments to avoid urls in urls
1895                         $body = preg_replace_callback("/\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",
1896                                 function ($match) {
1897                                         return ("[url=" . str_replace("#", "&num;", $match[1]) . "]" . str_replace("#", "&num;", $match[2]) . "[/url]");
1898                                 }, $body);
1899
1900                         $body = preg_replace_callback("/\[bookmark\=([$URLSearchString]*)\](.*?)\[\/bookmark\]/ism",
1901                                 function ($match) {
1902                                         return ("[bookmark=" . str_replace("#", "&num;", $match[1]) . "]" . str_replace("#", "&num;", $match[2]) . "[/bookmark]");
1903                                 }, $body);
1904
1905                         $body = preg_replace_callback("/\[attachment (.*?)\](.*?)\[\/attachment\]/ism",
1906                                 function ($match) {
1907                                         return ("[attachment " . str_replace("#", "&num;", $match[1]) . "]" . $match[2] . "[/attachment]");
1908                                 }, $body);
1909
1910                         // Repair recursive urls
1911                         $body = preg_replace("/&num;\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",
1912                                 "&num;$2", $body);
1913
1914                         foreach ($tags as $tag) {
1915                                 if ((strpos($tag, '#') !== 0) || strpos($tag, '[url=') || strlen($tag) < 2 || $tag[1] == '#') {
1916                                         continue;
1917                                 }
1918
1919                                 $basetag = str_replace('_', ' ', substr($tag, 1));
1920                                 $newtag = '#[url=' . DI::baseUrl() . '/search?tag=' . $basetag . ']' . $basetag . '[/url]';
1921
1922                                 $body = str_replace($tag, $newtag, $body);
1923                         }
1924
1925                         // Convert back the masked hashtags
1926                         $body = str_replace("&num;", "#", $body);
1927
1928                         return $body;
1929                 });
1930
1931                 return $body;
1932         }
1933
1934         /**
1935          * look for mention tags and setup a second delivery chain for forum/community posts if appropriate
1936          *
1937          * @param int $uid
1938          * @param int $item_id
1939          * @return boolean true if item was deleted, else false
1940          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1941          * @throws \ImagickException
1942          */
1943         private static function tagDeliver($uid, $item_id)
1944         {
1945                 $mention = false;
1946
1947                 $owner = User::getOwnerDataById($uid);
1948                 if (!DBA::isResult($owner)) {
1949                         Logger::warning('User not found, quitting here.', ['uid' => $uid]);
1950                         return false;
1951                 }
1952
1953                 if ($owner['contact-type'] != User::ACCOUNT_TYPE_COMMUNITY) {
1954                         Logger::debug('Owner is no community, quitting here.', ['uid' => $uid, 'id' => $item_id]);
1955                         return false;
1956                 }
1957
1958                 $item = Post::selectFirst(self::ITEM_FIELDLIST, ['id' => $item_id, 'gravity' => [GRAVITY_PARENT, GRAVITY_COMMENT], 'origin' => false]);
1959                 if (!DBA::isResult($item)) {
1960                         Logger::debug('Post is an activity or origin or not found at all, quitting here.', ['id' => $item_id]);
1961                         return false;
1962                 }
1963
1964                 if ($item['gravity'] == GRAVITY_PARENT) {
1965                         $tags = Tag::getByURIId($item['uri-id'], [Tag::MENTION, Tag::EXCLUSIVE_MENTION]);
1966                         foreach ($tags as $tag) {
1967                                 if (Strings::compareLink($owner['url'], $tag['url'])) {
1968                                         $mention = true;
1969                                         Logger::info('Mention found in tag.', ['url' => $tag['url'], 'uri' => $item['uri'], 'uid' => $uid, 'id' => $item_id, 'uri-id' => $item['uri-id'], 'guid' => $item['guid']]);
1970                                 }
1971                         }
1972
1973                         if (!$mention) {
1974                                 Logger::info('Top-level post without mention is deleted.', ['uri' => $item['uri'], $uid, 'id' => $item_id, 'uri-id' => $item['uri-id'], 'guid' => $item['guid']]);
1975                                 Post\User::delete(['uri-id' => $item['uri-id'], 'uid' => $item['uid']]);
1976                                 return true;
1977                         }
1978
1979                         $arr = ['item' => $item, 'user' => $owner];
1980
1981                         Hook::callAll('tagged', $arr);
1982                 } else {
1983                         $tags = Tag::getByURIId($item['parent-uri-id'], [Tag::MENTION, Tag::EXCLUSIVE_MENTION]);
1984                         foreach ($tags as $tag) {
1985                                 if (Strings::compareLink($owner['url'], $tag['url'])) {
1986                                         $mention = true;
1987                                         Logger::info('Mention found in parent tag.', ['url' => $tag['url'], 'uri' => $item['uri'], 'uid' => $uid, 'id' => $item_id, 'uri-id' => $item['uri-id'], 'guid' => $item['guid']]);
1988                                 }
1989                         }
1990
1991                         if (!$mention) {
1992                                 Logger::debug('No mentions found in parent, quitting here.', ['id' => $item_id, 'uri-id' => $item['uri-id'], 'guid' => $item['guid']]);
1993                                 return false;
1994                         }
1995                 }
1996
1997                 Logger::info('Community post will be distributed', ['uri' => $item['uri'], 'uid' => $uid, 'id' => $item_id, 'uri-id' => $item['uri-id'], 'guid' => $item['guid']]);
1998
1999                 if ($owner['page-flags'] == User::PAGE_FLAGS_PRVGROUP) {
2000                         $allow_cid = '';
2001                         $allow_gid = '<' . Group::FOLLOWERS . '>';
2002                         $deny_cid  = '';
2003                         $deny_gid  = '';
2004                         self::performActivity($item['id'], 'announce', $uid, $allow_cid, $allow_gid, $deny_cid, $deny_gid);
2005                 } else {
2006                         self::performActivity($item['id'], 'announce', $uid);
2007                 }
2008
2009                 Logger::info('Community post had been distributed', ['uri' => $item['uri'], 'uid' => $uid, 'id' => $item_id, 'uri-id' => $item['uri-id'], 'guid' => $item['guid']]);
2010                 return false;
2011         }
2012
2013         /**
2014          * Automatically reshare the item if the "remote_self" option is selected
2015          *
2016          * @param array $item
2017          * @return void
2018          */
2019         private static function autoReshare(array $item)
2020         {
2021                 if ($item['gravity'] != GRAVITY_PARENT) {
2022                         return;
2023                 }
2024
2025                 if (!DBA::exists('contact', ['id' => $item['contact-id'], 'remote_self' => Contact::MIRROR_NATIVE_RESHARE])) {
2026                         return;
2027                 }
2028
2029                 if (!in_array($item['network'], [Protocol::ACTIVITYPUB, Protocol::DFRN])) {
2030                         return;
2031                 }
2032
2033                 Logger::info('Automatically reshare item', ['uid' => $item['uid'], 'id' => $item['id'], 'guid' => $item['guid'], 'uri-id' => $item['uri-id']]);
2034
2035                 self::performActivity($item['id'], 'announce', $item['uid']);
2036         }
2037
2038         public static function isRemoteSelf($contact, &$datarray)
2039         {
2040                 if (!$contact['remote_self']) {
2041                         return false;
2042                 }
2043
2044                 // Prevent the forwarding of posts that are forwarded
2045                 if (!empty($datarray["extid"]) && ($datarray["extid"] == Protocol::DFRN)) {
2046                         Logger::info('Already forwarded');
2047                         return false;
2048                 }
2049
2050                 // Prevent to forward already forwarded posts
2051                 if ($datarray["app"] == DI::baseUrl()->getHostname()) {
2052                         Logger::info('Already forwarded (second test)');
2053                         return false;
2054                 }
2055
2056                 // Only forward posts
2057                 if ($datarray["verb"] != Activity::POST) {
2058                         Logger::info('No post');
2059                         return false;
2060                 }
2061
2062                 if (($contact['network'] != Protocol::FEED) && ($datarray['private'] == self::PRIVATE)) {
2063                         Logger::info('Not public');
2064                         return false;
2065                 }
2066
2067                 $datarray2 = $datarray;
2068                 Logger::info('remote-self start', ['contact' => $contact['url'], 'remote_self'=> $contact['remote_self'], 'item' => $datarray]);
2069                 if ($contact['remote_self'] == Contact::MIRROR_OWN_POST) {
2070                         $self = DBA::selectFirst('contact', ['id', 'name', 'url', 'thumb'],
2071                                         ['uid' => $contact['uid'], 'self' => true]);
2072                         if (DBA::isResult($self)) {
2073                                 $datarray['contact-id'] = $self["id"];
2074
2075                                 $datarray['owner-name'] = $self["name"];
2076                                 $datarray['owner-link'] = $self["url"];
2077                                 $datarray['owner-avatar'] = $self["thumb"];
2078
2079                                 $datarray['author-name']   = $datarray['owner-name'];
2080                                 $datarray['author-link']   = $datarray['owner-link'];
2081                                 $datarray['author-avatar'] = $datarray['owner-avatar'];
2082
2083                                 unset($datarray['edited']);
2084
2085                                 unset($datarray['network']);
2086                                 unset($datarray['owner-id']);
2087                                 unset($datarray['author-id']);
2088                         }
2089
2090                         if ($contact['network'] != Protocol::FEED) {
2091                                 $old_uri_id = $datarray["uri-id"] ?? 0;
2092                                 $datarray["guid"] = System::createUUID();
2093                                 unset($datarray["plink"]);
2094                                 $datarray["uri"] = self::newURI($contact['uid'], $datarray["guid"]);
2095                                 $datarray["uri-id"] = ItemURI::getIdByURI($datarray["uri"]);
2096                                 $datarray["extid"] = Protocol::DFRN;
2097                                 $urlpart = parse_url($datarray2['author-link']);
2098                                 $datarray["app"] = $urlpart["host"];
2099                                 if (!empty($old_uri_id)) {
2100                                         Post\Media::copy($old_uri_id, $datarray["uri-id"]);
2101                                 }
2102
2103                                 unset($datarray["parent-uri"]);
2104                                 unset($datarray["thr-parent"]);
2105                         } else {
2106                                 $datarray['private'] = self::PUBLIC;
2107                         }
2108                 }
2109
2110                 if ($contact['network'] != Protocol::FEED) {
2111                         // Store the original post
2112                         $result = self::insert($datarray2);
2113                         Logger::info('remote-self post original item', ['contact' => $contact['url'], 'result'=> $result, 'item' => $datarray2]);
2114                 } else {
2115                         $datarray["app"] = "Feed";
2116                         $result = true;
2117                 }
2118
2119                 return (bool)$result;
2120         }
2121
2122         /**
2123          *
2124          * @param string $s
2125          * @param int    $uid
2126          * @param array  $item
2127          * @param int    $cid
2128          * @return string
2129          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
2130          * @throws \ImagickException
2131          */
2132         public static function fixPrivatePhotos($s, $uid, $item = null, $cid = 0)
2133         {
2134                 if (DI::config()->get('system', 'disable_embedded')) {
2135                         return $s;
2136                 }
2137
2138                 Logger::info('check for photos');
2139                 $site = substr(DI::baseUrl(), strpos(DI::baseUrl(), '://'));
2140
2141                 $orig_body = $s;
2142                 $new_body = '';
2143
2144                 $img_start = strpos($orig_body, '[img');
2145                 $img_st_close = ($img_start !== false ? strpos(substr($orig_body, $img_start), ']') : false);
2146                 $img_len = ($img_start !== false ? strpos(substr($orig_body, $img_start + $img_st_close + 1), '[/img]') : false);
2147
2148                 while (($img_st_close !== false) && ($img_len !== false)) {
2149                         $img_st_close++; // make it point to AFTER the closing bracket
2150                         $image = substr($orig_body, $img_start + $img_st_close, $img_len);
2151
2152                         Logger::info('found photo', ['image' => $image]);
2153
2154                         if (stristr($image, $site . '/photo/')) {
2155                                 // Only embed locally hosted photos
2156                                 $replace = false;
2157                                 $i = basename($image);
2158                                 $i = str_replace(['.jpg', '.png', '.gif'], ['', '', ''], $i);
2159                                 $x = strpos($i, '-');
2160
2161                                 if ($x) {
2162                                         $res = substr($i, $x + 1);
2163                                         $i = substr($i, 0, $x);
2164                                         $photo = Photo::getPhotoForUser($uid, $i, $res);
2165                                         if (DBA::isResult($photo)) {
2166                                                 /*
2167                                                  * Check to see if we should replace this photo link with an embedded image
2168                                                  * 1. No need to do so if the photo is public
2169                                                  * 2. If there's a contact-id provided, see if they're in the access list
2170                                                  *    for the photo. If so, embed it.
2171                                                  * 3. Otherwise, if we have an item, see if the item permissions match the photo
2172                                                  *    permissions, regardless of order but first check to see if they're an exact
2173                                                  *    match to save some processing overhead.
2174                                                  */
2175                                                 if (self::hasPermissions($photo)) {
2176                                                         if ($cid) {
2177                                                                 $recips = self::enumeratePermissions($photo);
2178                                                                 if (in_array($cid, $recips)) {
2179                                                                         $replace = true;
2180                                                                 }
2181                                                         } elseif ($item) {
2182                                                                 if (self::samePermissions($uid, $item, $photo)) {
2183                                                                         $replace = true;
2184                                                                 }
2185                                                         }
2186                                                 }
2187                                                 if ($replace) {
2188                                                         $photo_img = Photo::getImageForPhoto($photo);
2189                                                         // If a custom width and height were specified, apply before embedding
2190                                                         if (preg_match("/\[img\=([0-9]*)x([0-9]*)\]/is", substr($orig_body, $img_start, $img_st_close), $match)) {
2191                                                                 Logger::info('scaling photo');
2192
2193                                                                 $width = intval($match[1]);
2194                                                                 $height = intval($match[2]);
2195
2196                                                                 $photo_img->scaleDown(max($width, $height));
2197                                                         }
2198
2199                                                         $data = $photo_img->asString();
2200                                                         $type = $photo_img->getType();
2201
2202                                                         Logger::info('replacing photo');
2203                                                         $image = 'data:' . $type . ';base64,' . base64_encode($data);
2204                                                         Logger::debug('replaced', ['image' => $image]);
2205                                                 }
2206                                         }
2207                                 }
2208                         }
2209
2210                         $new_body = $new_body . substr($orig_body, 0, $img_start + $img_st_close) . $image . '[/img]';
2211                         $orig_body = substr($orig_body, $img_start + $img_st_close + $img_len + strlen('[/img]'));
2212                         if ($orig_body === false) {
2213                                 $orig_body = '';
2214                         }
2215
2216                         $img_start = strpos($orig_body, '[img');
2217                         $img_st_close = ($img_start !== false ? strpos(substr($orig_body, $img_start), ']') : false);
2218                         $img_len = ($img_start !== false ? strpos(substr($orig_body, $img_start + $img_st_close + 1), '[/img]') : false);
2219                 }
2220
2221                 $new_body = $new_body . $orig_body;
2222
2223                 return $new_body;
2224         }
2225
2226         private static function hasPermissions($obj)
2227         {
2228                 return !empty($obj['allow_cid']) || !empty($obj['allow_gid']) ||
2229                         !empty($obj['deny_cid']) || !empty($obj['deny_gid']);
2230         }
2231
2232         private static function samePermissions($uid, $obj1, $obj2)
2233         {
2234                 // first part is easy. Check that these are exactly the same.
2235                 if (($obj1['allow_cid'] == $obj2['allow_cid'])
2236                         && ($obj1['allow_gid'] == $obj2['allow_gid'])
2237                         && ($obj1['deny_cid'] == $obj2['deny_cid'])
2238                         && ($obj1['deny_gid'] == $obj2['deny_gid'])) {
2239                         return true;
2240                 }
2241
2242                 // This is harder. Parse all the permissions and compare the resulting set.
2243                 $recipients1 = self::enumeratePermissions($obj1);
2244                 $recipients2 = self::enumeratePermissions($obj2);
2245                 sort($recipients1);
2246                 sort($recipients2);
2247
2248                 /// @TODO Comparison of arrays, maybe use array_diff_assoc() here?
2249                 return ($recipients1 == $recipients2);
2250         }
2251
2252         /**
2253          * Returns an array of contact-ids that are allowed to see this object
2254          *
2255          * @param array $obj        Item array with at least uid, allow_cid, allow_gid, deny_cid and deny_gid
2256          * @param bool  $check_dead Prunes unavailable contacts from the result
2257          * @return array
2258          * @throws \Exception
2259          */
2260         public static function enumeratePermissions(array $obj, bool $check_dead = false)
2261         {
2262                 $aclFormater = DI::aclFormatter();
2263
2264                 $allow_people = $aclFormater->expand($obj['allow_cid']);
2265                 $allow_groups = Group::expand($obj['uid'], $aclFormater->expand($obj['allow_gid']), $check_dead);
2266                 $deny_people  = $aclFormater->expand($obj['deny_cid']);
2267                 $deny_groups  = Group::expand($obj['uid'], $aclFormater->expand($obj['deny_gid']), $check_dead);
2268                 $recipients   = array_unique(array_merge($allow_people, $allow_groups));
2269                 $deny         = array_unique(array_merge($deny_people, $deny_groups));
2270                 $recipients   = array_diff($recipients, $deny);
2271                 return $recipients;
2272         }
2273
2274         public static function expire(int $uid, int $days, string $network = "", bool $force = false)
2275         {
2276                 if (!$uid || ($days < 1)) {
2277                         return;
2278                 }
2279
2280                 $condition = ["`uid` = ? AND NOT `deleted` AND `gravity` = ?",
2281                         $uid, GRAVITY_PARENT];
2282
2283                 /*
2284                  * $expire_network_only = save your own wall posts
2285                  * and just expire conversations started by others
2286                  */
2287                 $expire_network_only = DI::pConfig()->get($uid, 'expire', 'network_only', false);
2288
2289                 if ($expire_network_only) {
2290                         $condition[0] .= " AND NOT `wall`";
2291                 }
2292
2293                 if ($network != "") {
2294                         $condition[0] .= " AND `network` = ?";
2295                         $condition[] = $network;
2296                 }
2297
2298                 $condition[0] .= " AND `received` < ?";
2299                 $condition[] = DateTimeFormat::utc('now - ' . $days . ' day');
2300
2301                 $items = Post::select(['resource-id', 'starred', 'id', 'post-type', 'uid', 'uri-id'], $condition);
2302
2303                 if (!DBA::isResult($items)) {
2304                         return;
2305                 }
2306
2307                 $expire_items = DI::pConfig()->get($uid, 'expire', 'items', true);
2308
2309                 // Forcing expiring of items - but not notes and marked items
2310                 if ($force) {
2311                         $expire_items = true;
2312                 }
2313
2314                 $expire_notes = DI::pConfig()->get($uid, 'expire', 'notes', true);
2315                 $expire_starred = DI::pConfig()->get($uid, 'expire', 'starred', true);
2316                 $expire_photos = DI::pConfig()->get($uid, 'expire', 'photos', false);
2317
2318                 $expired = 0;
2319
2320                 $priority = DI::config()->get('system', 'expire-notify-priority');
2321
2322                 while ($item = Post::fetch($items)) {
2323                         // don't expire filed items
2324                         if (DBA::exists('post-category', ['uri-id' => $item['uri-id'], 'uid' => $item['uid'], 'type' => Post\Category::FILE])) {
2325                                 continue;
2326                         }
2327
2328                         // Only expire posts, not photos and photo comments
2329
2330                         if (!$expire_photos && !empty($item['resource-id'])) {
2331                                 continue;
2332                         } elseif (!$expire_starred && intval($item['starred'])) {
2333                                 continue;
2334                         } elseif (!$expire_notes && ($item['post-type'] == self::PT_PERSONAL_NOTE)) {
2335                                 continue;
2336                         } elseif (!$expire_items && ($item['post-type'] != self::PT_PERSONAL_NOTE)) {
2337                                 continue;
2338                         }
2339
2340                         self::markForDeletionById($item['id'], $priority);
2341
2342                         ++$expired;
2343                 }
2344                 DBA::close($items);
2345                 Logger::notice('User ' . $uid . ": expired $expired items; expire items: $expire_items, expire notes: $expire_notes, expire starred: $expire_starred, expire photos: $expire_photos");
2346         }
2347
2348         public static function firstPostDate($uid, $wall = false)
2349         {
2350                 $user = User::getById($uid, ['register_date']);
2351                 if (empty($user)) {
2352                         return false;
2353                 }
2354
2355                 $condition = ["`uid` = ? AND `wall` = ? AND NOT `deleted` AND `visible` AND `received` >= ?",
2356                         $uid, $wall, $user['register_date']];
2357                 $params = ['order' => ['received' => false]];
2358                 $thread = Post::selectFirstThread(['received'], $condition, $params);
2359                 if (DBA::isResult($thread)) {
2360                         $postdate = substr(DateTimeFormat::local($thread['received']), 0, 10);
2361                         return $postdate;
2362                 }
2363                 return false;
2364         }
2365
2366         /**
2367          * add/remove activity to an item
2368          *
2369          * Toggle activities as like,dislike,attend of an item
2370          *
2371          * @param int    $item_id
2372          * @param string $verb
2373          *            Activity verb. One of
2374          *            like, unlike, dislike, undislike, attendyes, unattendyes,
2375          *            attendno, unattendno, attendmaybe, unattendmaybe,
2376          *            announce, unannouce
2377          * @param int    $uid
2378          * @param string $allow_cid
2379          * @param string $allow_gid
2380          * @param string $deny_cid
2381          * @param string $deny_gid
2382          * @return bool
2383          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
2384          * @throws \ImagickException
2385          * @hook  'post_local_end'
2386          *            array $arr
2387          *            'post_id' => ID of posted item
2388          */
2389         public static function performActivity(int $item_id, string $verb, int $uid, string $allow_cid = null, string $allow_gid = null, string $deny_cid = null, string $deny_gid = null)
2390         {
2391                 if (empty($uid)) {
2392                         return false;
2393                 }
2394
2395                 Logger::notice('Start create activity', ['verb' => $verb, 'item' => $item_id, 'user' => $uid]);
2396
2397                 $item = Post::selectFirst(self::ITEM_FIELDLIST, ['id' => $item_id]);
2398                 if (!DBA::isResult($item)) {
2399                         Logger::notice('like: unknown item', ['id' => $item_id]);
2400                         return false;
2401                 }
2402
2403                 $uri_id = $item['uri-id'];
2404
2405                 if (!in_array($item['uid'], [0, $uid])) {
2406                         return false;
2407                 }
2408
2409                 if (!Post::exists(['uri-id' => $item['parent-uri-id'], 'uid' => $uid])) {
2410                         $stored = self::storeForUserByUriId($item['parent-uri-id'], $uid);
2411                         if (($item['parent-uri-id'] == $item['uri-id']) && !empty($stored)) {
2412                                 $item = Post::selectFirst(self::ITEM_FIELDLIST, ['id' => $stored]);
2413                                 if (!DBA::isResult($item)) {
2414                                         Logger::info('Could not fetch just created item - should not happen', ['stored' => $stored, 'uid' => $uid, 'uri-id' => $uri_id]);
2415                                         return false;
2416                                 }
2417                         }
2418                 }
2419
2420                 // Retrieves the local post owner
2421                 $owner = User::getOwnerDataById($uid);
2422                 if (empty($owner)) {
2423                         Logger::info('Empty owner for user', ['uid' => $uid]);
2424                         return false;
2425                 }
2426
2427                 // Retrieve the current logged in user's public contact
2428                 $author_id = Contact::getIdForURL($owner['url']);
2429                 if (empty($author_id)) {
2430                         Logger::info('Empty public contact');
2431                         return false;
2432                 }
2433
2434                 $activity = null;
2435                 switch ($verb) {
2436                         case 'like':
2437                         case 'unlike':
2438                                 $activity = Activity::LIKE;
2439                                 break;
2440                         case 'dislike':
2441                         case 'undislike':
2442                                 $activity = Activity::DISLIKE;
2443                                 break;
2444                         case 'attendyes':
2445                         case 'unattendyes':
2446                                 $activity = Activity::ATTEND;
2447                                 break;
2448                         case 'attendno':
2449                         case 'unattendno':
2450                                 $activity = Activity::ATTENDNO;
2451                                 break;
2452                         case 'attendmaybe':
2453                         case 'unattendmaybe':
2454                                 $activity = Activity::ATTENDMAYBE;
2455                                 break;
2456                         case 'follow':
2457                         case 'unfollow':
2458                                 $activity = Activity::FOLLOW;
2459                                 break;
2460                         case 'announce':
2461                         case 'unannounce':
2462                                 $activity = Activity::ANNOUNCE;
2463                                 break;
2464                         default:
2465                                 Logger::notice('unknown verb', ['verb' => $verb, 'item' => $item_id]);
2466                                 return false;
2467                 }
2468
2469                 $mode = Strings::startsWith($verb, 'un') ? 'delete' : 'create';
2470
2471                 // Enable activity toggling instead of on/off
2472                 $event_verb_flag = $activity === Activity::ATTEND || $activity === Activity::ATTENDNO || $activity === Activity::ATTENDMAYBE;
2473
2474                 // Look for an existing verb row
2475                 // Event participation activities are mutually exclusive, only one of them can exist at all times.
2476                 if ($event_verb_flag) {
2477                         $verbs = [Activity::ATTEND, Activity::ATTENDNO, Activity::ATTENDMAYBE];
2478
2479                         // Translate to the index based activity index
2480                         $vids = [];
2481                         foreach ($verbs as $verb) {
2482                                 $vids[] = Verb::getID($verb);
2483                         }
2484                 } else {
2485                         $vids = Verb::getID($activity);
2486                 }
2487
2488                 $condition = ['vid' => $vids, 'deleted' => false, 'gravity' => GRAVITY_ACTIVITY,
2489                         'author-id' => $author_id, 'uid' => $item['uid'], 'thr-parent-id' => $uri_id];
2490                 $like_item = Post::selectFirst(['id', 'guid', 'verb'], $condition);
2491
2492                 if (DBA::isResult($like_item)) {
2493                         /**
2494                          * Truth table for existing activities
2495                          *
2496                          * |          Inputs            ||      Outputs      |
2497                          * |----------------------------||-------------------|
2498                          * |  Mode  | Event | Same verb || Delete? | Return? |
2499                          * |--------|-------|-----------||---------|---------|
2500                          * | create |  Yes  |    Yes    ||   No    |   Yes   |
2501                          * | create |  Yes  |    No     ||   Yes   |   No    |
2502                          * | create |  No   |    Yes    ||   No    |   Yes   |
2503                          * | create |  No   |    No     ||        N/A†       |
2504                          * | delete |  Yes  |    Yes    ||   Yes   |   N/A‡  |
2505                          * | delete |  Yes  |    No     ||   No    |   N/A‡  |
2506                          * | delete |  No   |    Yes    ||   Yes   |   N/A‡  |
2507                          * | delete |  No   |    No     ||        N/A†       |
2508                          * |--------|-------|-----------||---------|---------|
2509                          * |   A    |   B   |     C     || A xor C | !B or C |
2510                          *
2511                          * † Can't happen: It's impossible to find an existing non-event activity without
2512                          *                 the same verb because we are only looking for this single verb.
2513                          *
2514                          * ‡ The "mode = delete" is returning early whether an existing activity was found or not.
2515                          */
2516                         if ($mode == 'create' xor $like_item['verb'] == $activity) {
2517                                 self::markForDeletionById($like_item['id']);
2518                         }
2519
2520                         if (!$event_verb_flag || $like_item['verb'] == $activity) {
2521                                 return true;
2522                         }
2523                 }
2524
2525                 // No need to go further if we aren't creating anything
2526                 if ($mode == 'delete') {
2527                         return true;
2528                 }
2529
2530                 $objtype = $item['resource-id'] ? Activity\ObjectType::IMAGE : Activity\ObjectType::NOTE;
2531
2532                 $new_item = [
2533                         'guid'          => System::createUUID(),
2534                         'uri'           => self::newURI($item['uid']),
2535                         'uid'           => $item['uid'],
2536                         'contact-id'    => $owner['id'],
2537                         'wall'          => $item['wall'],
2538                         'origin'        => 1,
2539                         'network'       => Protocol::DFRN,
2540                         'protocol'      => Conversation::PARCEL_DIRECT,
2541                         'direction'     => Conversation::PUSH,
2542                         'gravity'       => GRAVITY_ACTIVITY,
2543                         'parent'        => $item['id'],
2544                         'thr-parent'    => $item['uri'],
2545                         'owner-id'      => $author_id,
2546                         'author-id'     => $author_id,
2547                         'body'          => $activity,
2548                         'verb'          => $activity,
2549                         'object-type'   => $objtype,
2550                         'allow_cid'     => $allow_cid ?? $item['allow_cid'],
2551                         'allow_gid'     => $allow_gid ?? $item['allow_gid'],
2552                         'deny_cid'      => $deny_cid ?? $item['deny_cid'],
2553                         'deny_gid'      => $deny_gid ?? $item['deny_gid'],
2554                         'visible'       => 1,
2555                         'unseen'        => 1,
2556                 ];
2557
2558                 $signed = Diaspora::createLikeSignature($uid, $new_item);
2559                 if (!empty($signed)) {
2560                         $new_item['diaspora_signed_text'] = json_encode($signed);
2561                 }
2562
2563                 $new_item_id = self::insert($new_item);
2564
2565                 // If the parent item isn't visible then set it to visible
2566                 if (!$item['visible']) {
2567                         self::update(['visible' => true], ['id' => $item['id']]);
2568                 }
2569
2570                 $new_item['id'] = $new_item_id;
2571
2572                 Hook::callAll('post_local_end', $new_item);
2573
2574                 return true;
2575         }
2576
2577         /**
2578          * Fetch the SQL condition for the given user id
2579          *
2580          * @param integer $owner_id User ID for which the permissions should be fetched
2581          * @return array condition
2582          */
2583         public static function getPermissionsConditionArrayByUserId(int $owner_id)
2584         {
2585                 $local_user = local_user();
2586                 $remote_user = Session::getRemoteContactID($owner_id);
2587
2588                 // default permissions - anonymous user
2589                 $condition = ["`private` != ?", self::PRIVATE];
2590
2591                 if ($local_user && ($local_user == $owner_id)) {
2592                         // Profile owner - everything is visible
2593                         $condition = [];
2594                 } elseif ($remote_user) {
2595                          // Authenticated visitor - fetch the matching permissionsets
2596                         $permissionSets = DI::permissionSet()->selectByContactId($remote_user, $owner_id);
2597                         if (!empty($set)) {
2598                                 $condition = ["(`private` != ? OR (`private` = ? AND `wall`
2599                                         AND `psid` IN (" . implode(', ', array_fill(0, count($set), '?')) . ")))",
2600                                         self::PRIVATE, self::PRIVATE];
2601                                 $condition = array_merge($condition, $permissionSets->column('id'));
2602                         }
2603                 }
2604
2605                 return $condition;
2606         }
2607
2608         /**
2609          * Get a permission SQL string for the given user
2610          *
2611          * @param int $owner_id
2612          * @param string $table
2613          * @return string
2614          */
2615         public static function getPermissionsSQLByUserId(int $owner_id, string $table = '')
2616         {
2617                 $local_user = local_user();
2618                 $remote_user = Session::getRemoteContactID($owner_id);
2619
2620                 if (!empty($table)) {
2621                         $table = DBA::quoteIdentifier($table) . '.';
2622                 }
2623
2624                 /*
2625                  * Construct permissions
2626                  *
2627                  * default permissions - anonymous user
2628                  */
2629                 $sql = sprintf(" AND " . $table . "`private` != %d", self::PRIVATE);
2630
2631                 // Profile owner - everything is visible
2632                 if ($local_user && ($local_user == $owner_id)) {
2633                         $sql = '';
2634                 } elseif ($remote_user) {
2635                         /*
2636                          * Authenticated visitor. Unless pre-verified,
2637                          * check that the contact belongs to this $owner_id
2638                          * and load the groups the visitor belongs to.
2639                          * If pre-verified, the caller is expected to have already
2640                          * done this and passed the groups into this function.
2641                          */
2642                         $permissionSets = DI::permissionSet()->selectByContactId($remote_user, $owner_id);
2643
2644                         if (!empty($set)) {
2645                                 $sql_set = sprintf(" OR (" . $table . "`private` = %d AND " . $table . "`wall` AND " . $table . "`psid` IN (", self::PRIVATE) . implode(',', $permissionSets->column('id')) . "))";
2646                         } else {
2647                                 $sql_set = '';
2648                         }
2649
2650                         $sql = sprintf(" AND (" . $table . "`private` != %d", self::PRIVATE) . $sql_set . ")";
2651                 }
2652
2653                 return $sql;
2654         }
2655
2656         /**
2657          * get translated item type
2658          *
2659          * @param array                $item
2660          * @param \Friendica\Core\L10n $l10n
2661          * @return string
2662          */
2663         public static function postType(array $item, \Friendica\Core\L10n $l10n)
2664         {
2665                 if (!empty($item['event-id'])) {
2666                         return $l10n->t('event');
2667                 } elseif (!empty($item['resource-id'])) {
2668                         return $l10n->t('photo');
2669                 } elseif ($item['gravity'] == GRAVITY_ACTIVITY) {
2670                         return $l10n->t('activity');
2671                 } elseif ($item['gravity'] == GRAVITY_COMMENT) {
2672                         return $l10n->t('comment');
2673                 }
2674
2675                 return $l10n->t('post');
2676         }
2677
2678         /**
2679          * Sets the "rendered-html" field of the provided item
2680          *
2681          * Body is preserved to avoid side-effects as we modify it just-in-time for spoilers and private image links
2682          *
2683          * @param array $item
2684          *
2685          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
2686          * @todo Remove reference, simply return "rendered-html" and "rendered-hash"
2687          */
2688         public static function putInCache(&$item)
2689         {
2690                 // Save original body to prevent addons to modify it
2691                 $body = $item['body'];
2692
2693                 $rendered_hash = $item['rendered-hash'] ?? '';
2694                 $rendered_html = $item['rendered-html'] ?? '';
2695
2696                 if ($rendered_hash == ''
2697                         || $rendered_html == ''
2698                         || $rendered_hash != hash('md5', BBCode::VERSION . '::' . $body)
2699                         || DI::config()->get('system', 'ignore_cache')
2700                 ) {
2701                         self::addRedirToImageTags($item);
2702
2703                         $item['rendered-html'] = BBCode::convertForUriId($item['uri-id'], $item['body']);
2704                         $item['rendered-hash'] = hash('md5', BBCode::VERSION . '::' . $body);
2705
2706                         $hook_data = ['item' => $item, 'rendered-html' => $item['rendered-html'], 'rendered-hash' => $item['rendered-hash']];
2707                         Hook::callAll('put_item_in_cache', $hook_data);
2708                         $item['rendered-html'] = $hook_data['rendered-html'];
2709                         $item['rendered-hash'] = $hook_data['rendered-hash'];
2710                         unset($hook_data);
2711
2712                         // Update if the generated values differ from the existing ones
2713                         if ((($rendered_hash != $item['rendered-hash']) || ($rendered_html != $item['rendered-html'])) && !empty($item['id'])) {
2714                                 self::update(
2715                                         [
2716                                                 'rendered-html' => $item['rendered-html'],
2717                                                 'rendered-hash' => $item['rendered-hash']
2718                                         ],
2719                                         ['id' => $item['id']]
2720                                 );
2721                         }
2722                 }
2723
2724                 $item['body'] = $body;
2725         }
2726
2727         /**
2728          * Find any non-embedded images in private items and add redir links to them
2729          *
2730          * @param array &$item The field array of an item row
2731          */
2732         private static function addRedirToImageTags(array &$item)
2733         {
2734                 $app = DI::app();
2735
2736                 $matches = [];
2737                 $cnt = preg_match_all('|\[img\](http[^\[]*?/photo/[a-fA-F0-9]+?(-[0-9]\.[\w]+?)?)\[\/img\]|', $item['body'], $matches, PREG_SET_ORDER);
2738                 if ($cnt) {
2739                         foreach ($matches as $mtch) {
2740                                 if (strpos($mtch[1], '/redir') !== false) {
2741                                         continue;
2742                                 }
2743
2744                                 if ((local_user() == $item['uid']) && ($item['private'] == self::PRIVATE) && ($item['contact-id'] != $app->getContactId()) && ($item['network'] == Protocol::DFRN)) {
2745                                         $img_url = 'redir/' . $item['contact-id'] . '?url=' . urlencode($mtch[1]);
2746                                         $item['body'] = str_replace($mtch[0], '[img]' . $img_url . '[/img]', $item['body']);
2747                                 }
2748                         }
2749                 }
2750         }
2751
2752         /**
2753          * Given an item array, convert the body element from bbcode to html and add smilie icons.
2754          * If attach is true, also add icons for item attachments.
2755          *
2756          * @param array   $item
2757          * @param boolean $attach
2758          * @param boolean $is_preview
2759          * @return string item body html
2760          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
2761          * @throws \ImagickException
2762          * @hook  prepare_body_init item array before any work
2763          * @hook  prepare_body_content_filter ('item'=>item array, 'filter_reasons'=>string array) before first bbcode to html
2764          * @hook  prepare_body ('item'=>item array, 'html'=>body string, 'is_preview'=>boolean, 'filter_reasons'=>string array) after first bbcode to html
2765          * @hook  prepare_body_final ('item'=>item array, 'html'=>body string) after attach icons and blockquote special case handling (spoiler, author)
2766          */
2767         public static function prepareBody(array &$item, $attach = false, $is_preview = false)
2768         {
2769                 $a = DI::app();
2770                 Hook::callAll('prepare_body_init', $item);
2771
2772                 // In order to provide theme developers more possibilities, event items
2773                 // are treated differently.
2774                 if ($item['object-type'] === Activity\ObjectType::EVENT && isset($item['event-id'])) {
2775                         $ev = Event::getItemHTML($item);
2776                         return $ev;
2777                 }
2778
2779                 $tags = Tag::populateFromItem($item);
2780
2781                 $item['tags'] = $tags['tags'];
2782                 $item['hashtags'] = $tags['hashtags'];
2783                 $item['mentions'] = $tags['mentions'];
2784
2785                 $body = $item['body'] ?? '';
2786                 $shared = BBCode::fetchShareAttributes($body);
2787                 if (!empty($shared['guid'])) {
2788                         $shared_item = Post::selectFirst(['uri-id', 'plink'], ['guid' => $shared['guid']]);
2789                         $shared_uri_id = $shared_item['uri-id'] ?? 0;
2790                         $shared_links = [strtolower($shared_item['plink'] ?? '')];
2791                         $shared_attachments = Post\Media::splitAttachments($shared_uri_id, $shared['guid']);
2792                         $shared_links = array_merge($shared_links, array_column($shared_attachments['visual'], 'url'));
2793                         $shared_links = array_merge($shared_links, array_column($shared_attachments['link'], 'url'));
2794                         $shared_links = array_merge($shared_links, array_column($shared_attachments['additional'], 'url'));
2795                         $item['body'] = self::replaceVisualAttachments($shared_attachments, $item['body']);
2796                 } else {
2797                         $shared_uri_id = 0;
2798                         $shared_links = [];
2799                 }
2800                 $attachments = Post\Media::splitAttachments($item['uri-id'], $item['guid'] ?? '', $shared_links);
2801                 $item['body'] = self::replaceVisualAttachments($attachments, $item['body'] ?? '');
2802
2803                 $item['body'] = preg_replace("/\s*\[attachment .*?\].*?\[\/attachment\]\s*/ism", "\n", $item['body']);
2804                 self::putInCache($item);
2805                 $item['body'] = $body;
2806                 $s = $item["rendered-html"];
2807
2808                 // Compile eventual content filter reasons
2809                 $filter_reasons = [];
2810                 if (!$is_preview && public_contact() != $item['author-id']) {
2811                         if (!empty($item['content-warning']) && (!local_user() || !DI::pConfig()->get(local_user(), 'system', 'disable_cw', false))) {
2812                                 $filter_reasons[] = DI::l10n()->t('Content warning: %s', $item['content-warning']);
2813                         }
2814
2815                         $item['attachments'] = $attachments;
2816
2817                         $hook_data = [
2818                                 'item' => $item,
2819                                 'filter_reasons' => $filter_reasons
2820                         ];
2821                         Hook::callAll('prepare_body_content_filter', $hook_data);
2822                         $filter_reasons = $hook_data['filter_reasons'];
2823                         unset($hook_data);
2824                 }
2825
2826                 $hook_data = [
2827                         'item' => $item,
2828                         'html' => $s,
2829                         'preview' => $is_preview,
2830                         'filter_reasons' => $filter_reasons
2831                 ];
2832                 Hook::callAll('prepare_body', $hook_data);
2833                 $s = $hook_data['html'];
2834                 unset($hook_data);
2835
2836                 if (!$attach) {
2837                         // Replace the blockquotes with quotes that are used in mails.
2838                         $mailquote = '<blockquote type="cite" class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">';
2839                         $s = str_replace(['<blockquote>', '<blockquote class="spoiler">', '<blockquote class="author">'], [$mailquote, $mailquote, $mailquote], $s);
2840                         return $s;
2841                 }
2842
2843                 if (!empty($shared_attachments)) {
2844                         $s = self::addVisualAttachments($shared_attachments, $item, $s, true);
2845                         $s = self::addLinkAttachment($shared_uri_id ?: $item['uri-id'], $shared_attachments, $body, $s, true, []);
2846                         $s = self::addNonVisualAttachments($shared_attachments, $item, $s, true);
2847                         $body = preg_replace("/\s*\[share .*?\].*?\[\/share\]\s*/ism", '', $body);
2848                 }
2849
2850                 $s = self::addVisualAttachments($attachments, $item, $s, false);
2851                 $s = self::addLinkAttachment($item['uri-id'], $attachments, $body, $s, false, $shared_links);
2852                 $s = self::addNonVisualAttachments($attachments, $item, $s, false);
2853
2854                 // Map.
2855                 if (strpos($s, '<div class="map">') !== false && !empty($item['coord'])) {
2856                         $x = Map::byCoordinates(trim($item['coord']));
2857                         if ($x) {
2858                                 $s = preg_replace('/\<div class\=\"map\"\>/', '$0' . $x, $s);
2859                         }
2860                 }
2861
2862                 // Replace friendica image url size with theme preference.
2863                 if (!empty($a->getThemeInfoValue('item_image_size'))) {
2864                         $ps = $a->getThemeInfoValue('item_image_size');
2865                         $s = preg_replace('|(<img[^>]+src="[^"]+/photo/[0-9a-f]+)-[0-9]|', "$1-" . $ps, $s);
2866                 }
2867
2868                 $s = HTML::applyContentFilter($s, $filter_reasons);
2869
2870                 $hook_data = ['item' => $item, 'html' => $s];
2871                 Hook::callAll('prepare_body_final', $hook_data);
2872
2873                 return $hook_data['html'];
2874         }
2875
2876         /**
2877          * Check if the body contains a link
2878          *
2879          * @param string $body
2880          * @param string $url
2881          * @param int    $type
2882          * @return bool
2883          */
2884         public static function containsLink(string $body, string $url, int $type = 0)
2885         {
2886                 // Make sure that for example site parameters aren't used when testing if the link is contained in the body
2887                 $urlparts = parse_url($url);
2888                 unset($urlparts['query']);
2889                 unset($urlparts['fragment']);
2890                 $url = Network::unparseURL($urlparts);
2891
2892                 // Remove media links to only search in embedded content
2893                 // @todo Check images for image link, audio for audio links, ...
2894                 if (in_array($type, [Post\Media::AUDIO, Post\Media::VIDEO, Post\Media::IMAGE])) {
2895                         $body = preg_replace("/\[url=[^\[\]]*\](.*)\[\/url\]/Usi", ' $1 ', $body);
2896                 }
2897
2898                 if (strpos($body, $url)) {
2899                         return true;
2900                 }
2901                 foreach ([0, 1, 2] as $size) {
2902                         if (preg_match('#/photo/.*-' . $size . '\.#ism', $url) &&
2903                                 strpos(preg_replace('#(/photo/.*)-[012]\.#ism', '$1-' . $size . '.', $body), $url)) {
2904                                 return true;
2905                         }
2906                 }
2907                 return false;
2908         }
2909
2910         /**
2911          * Replace visual attachments in the body
2912          *
2913          * @param array $attachments
2914          * @param string $body
2915          * @return string modified body
2916          */
2917         private static function replaceVisualAttachments(array $attachments, string $body)
2918         {
2919                 DI::profiler()->startRecording('rendering');
2920
2921                 foreach ($attachments['visual'] as $attachment) {
2922                         if (!empty($attachment['preview'])) {
2923                                 $body = str_replace($attachment['preview'], Post\Media::getPreviewUrlForId($attachment['id'], Proxy::SIZE_LARGE), $body);
2924                         } elseif ($attachment['filetype'] == 'image') {
2925                                 $body = str_replace($attachment['url'], Post\Media::getUrlForId($attachment['id']), $body);
2926                         }
2927                 }
2928                 DI::profiler()->stopRecording();
2929                 return $body;
2930         }
2931
2932         /**
2933          * Add visual attachments to the content
2934          *
2935          * @param array $attachments
2936          * @param array $item
2937          * @param string $content
2938          * @return string modified content
2939          */
2940         private static function addVisualAttachments(array $attachments, array $item, string $content, bool $shared)
2941         {
2942                 DI::profiler()->startRecording('rendering');
2943                 $leading = '';
2944                 $trailing = '';
2945
2946                 // @todo In the future we should make a single for the template engine with all media in it. This allows more flexibilty.
2947                 foreach ($attachments['visual'] as $attachment) {
2948                         if (self::containsLink($item['body'], $attachment['preview'] ?? $attachment['url'], $attachment['type'])) {
2949                                 continue;
2950                         }
2951
2952                         if (!empty($attachment['preview'])) {
2953                                 $preview_url = Post\Media::getPreviewUrlForId($attachment['id'], Proxy::SIZE_LARGE);
2954                         } else {
2955                                 $preview_url = '';
2956                         }
2957
2958                         if (($attachment['filetype'] == 'video')) {
2959                                 /// @todo Move the template to /content as well
2960                                 $media = Renderer::replaceMacros(Renderer::getMarkupTemplate('video_top.tpl'), [
2961                                         '$video' => [
2962                                                 'id'      => $attachment['id'],
2963                                                 'src'     => $attachment['url'],
2964                                                 'name'    => $attachment['name'] ?: $attachment['url'],
2965                                                 'preview' => $preview_url,
2966                                                 'mime'    => $attachment['mimetype'],
2967                                         ],
2968                                 ]);
2969                                 if (($item['post-type'] ?? null) == Item::PT_VIDEO) {
2970                                         $leading .= $media;
2971                                 } else {
2972                                         $trailing .= $media;
2973                                 }
2974                         } elseif ($attachment['filetype'] == 'audio') {
2975                                 $media = Renderer::replaceMacros(Renderer::getMarkupTemplate('content/audio.tpl'), [
2976                                         '$audio' => [
2977                                                 'id'     => $attachment['id'],
2978                                                 'src'    => $attachment['url'],
2979                                                 'name'   => $attachment['name'] ?: $attachment['url'],
2980                                                 'mime'   => $attachment['mimetype'],
2981                                         ],
2982                                 ]);
2983                                 if (($item['post-type'] ?? null) == Item::PT_AUDIO) {
2984                                         $leading .= $media;
2985                                 } else {
2986                                         $trailing .= $media;
2987                                 }
2988                         } elseif ($attachment['filetype'] == 'image') {
2989                                 $media = Renderer::replaceMacros(Renderer::getMarkupTemplate('content/image.tpl'), [
2990                                         '$image' => [
2991                                                 'src'        => Post\Media::getUrlForId($attachment['id']),
2992                                                 'preview'    => Post\Media::getPreviewUrlForId($attachment['id'], ($attachment['width'] > $attachment['height']) ? Proxy::SIZE_MEDIUM : Proxy::SIZE_LARGE),
2993                                                 'attachment' => $attachment,
2994                                         ],
2995                                 ]);
2996                                 // On Diaspora posts the attached pictures are leading
2997                                 if ($item['network'] == Protocol::DIASPORA) {
2998                                         $leading .= $media;
2999                                 } else {
3000                                         $trailing .= $media;
3001                                 }
3002                         }
3003                 }
3004
3005                 if ($shared) {
3006                         $content = str_replace(BBCode::TOP_ANCHOR, '<div class="body-attach">' . $leading . '<div class="clear"></div></div>' . BBCode::TOP_ANCHOR, $content);
3007                         $content = str_replace(BBCode::BOTTOM_ANCHOR, '<div class="body-attach">' . $trailing . '<div class="clear"></div></div>' . BBCode::BOTTOM_ANCHOR, $content);
3008                 } else {
3009                         if ($leading != '') {
3010                                 $content = '<div class="body-attach">' . $leading . '<div class="clear"></div></div>' . $content;
3011                         }
3012
3013                         if ($trailing != '') {
3014                                 $content .= '<div class="body-attach">' . $trailing . '<div class="clear"></div></div>';
3015                         }
3016                 }
3017
3018                 DI::profiler()->stopRecording();
3019                 return $content;
3020         }
3021
3022         /**
3023          * Add link attachment to the content
3024          *
3025          * @param array  $attachments
3026          * @param string $body
3027          * @param string $content
3028          * @param bool   $shared
3029          * @param array  $ignore_links A list of URLs to ignore
3030          * @return string modified content
3031          */
3032         private static function addLinkAttachment(int $uriid, array $attachments, string $body, string $content, bool $shared, array $ignore_links)
3033         {
3034                 DI::profiler()->startRecording('rendering');
3035                 // Don't show a preview when there is a visual attachment (audio or video)
3036                 $types = array_column($attachments['visual'], 'type');
3037                 $preview = !in_array(Post\Media::IMAGE, $types) && !in_array(Post\Media::VIDEO, $types);
3038
3039                 if (!empty($attachments['link'])) {
3040                         foreach ($attachments['link'] as $link) {
3041                                 $found = false;
3042                                 foreach ($ignore_links as $ignore_link) {
3043                                         if (Strings::compareLink($link['url'], $ignore_link)) {
3044                                                 $found = true;
3045                                         }
3046                                 }
3047                                 // @todo Judge between the links to use the one with most information
3048                                 if (!$found && (empty($attachment) || !empty($link['author-name']) ||
3049                                         (empty($attachment['name']) && !empty($link['name'])) ||
3050                                         (empty($attachment['description']) && !empty($link['description'])) ||
3051                                         (empty($attachment['preview']) && !empty($link['preview'])))) {
3052                                         $attachment = $link;
3053                                 }
3054                         }
3055                 }
3056
3057                 if (!empty($attachment)) {
3058                         $data = [
3059                                 'after' => '',
3060                                 'author_name' => $attachment['author-name'] ?? '',
3061                                 'author_url' =>  $attachment['author-url'] ?? '',
3062                                 'description' => $attachment['description'] ?? '',
3063                                 'image' => '',
3064                                 'preview' => '',
3065                                 'provider_name' => $attachment['publisher-name'] ?? '',
3066                                 'provider_url' => $attachment['publisher-url'] ?? '',
3067                                 'text' => '',
3068                                 'title' => $attachment['name'] ?? '',
3069                                 'type' => 'link',
3070                                 'url' => $attachment['url']];
3071
3072                         if ($preview && !empty($attachment['preview'])) {
3073                                 if ($attachment['preview-width'] >= 500) {
3074                                         $data['image'] = Post\Media::getPreviewUrlForId($attachment['id'], Proxy::SIZE_MEDIUM);
3075                                 } else {
3076                                         $data['preview'] = Post\Media::getPreviewUrlForId($attachment['id'], Proxy::SIZE_MEDIUM);
3077                                 }
3078                         }
3079
3080                         if (!empty($data['description']) && !empty($content)) {
3081                                 similar_text($data['description'], $content, $percent);
3082                         } else {
3083                                 $percent = 0;
3084                         }
3085
3086                         if (!empty($data['description']) && (($data['title'] == $data['description']) || ($percent > 95) || (strpos($content, $data['description']) !== false))) {
3087                                 $data['description'] = '';
3088                         }
3089
3090                         if (($data['author_name'] ?? '') == ($data['provider_name'] ?? '')) {
3091                                 $data['author_name'] = '';
3092                         }
3093
3094                         if (($data['author_url'] ?? '') == ($data['provider_url'] ?? '')) {
3095                                 $data['author_url'] = '';
3096                         }
3097                 } elseif (preg_match("/.*(\[attachment.*?\].*?\[\/attachment\]).*/ism", $body, $match)) {
3098                         $data = BBCode::getAttachmentData($match[1]);
3099                 }
3100                 DI::profiler()->stopRecording();
3101
3102                 if (isset($data['url']) && !in_array($data['url'], $ignore_links)) {
3103                         if (!empty($data['description']) || !empty($data['image']) || !empty($data['preview'])) {
3104                                 $parts = parse_url($data['url']);
3105                                 if (!empty($parts['scheme']) && !empty($parts['host'])) {
3106                                         if (empty($data['provider_name'])) {
3107                                                 $data['provider_name'] = $parts['host'];
3108                                         }
3109                                         if (empty($data['provider_url']) || empty(parse_url($data['provider_url'], PHP_URL_SCHEME))) {
3110                                                 $data['provider_url'] = $parts['scheme'] . '://' . $parts['host'];
3111
3112                                                 if (!empty($parts['port'])) {
3113                                                         $data['provider_url'] .= ':' . $parts['port'];
3114                                                 }
3115                                         }
3116                                 }
3117
3118                                 // @todo Use a template
3119                                 $rendered = BBCode::convertAttachment('', BBCode::INTERNAL, false, $data, $uriid);
3120                         } elseif (!self::containsLink($content, $data['url'], Post\Media::HTML)) {
3121                                 $rendered = Renderer::replaceMacros(Renderer::getMarkupTemplate('content/link.tpl'), [
3122                                         '$url'  => $data['url'],
3123                                         '$title' => $data['title'],
3124                                 ]);
3125                         } else {
3126                                 return $content;
3127                         }
3128
3129                         if ($shared) {
3130                                 return str_replace(BBCode::BOTTOM_ANCHOR, BBCode::BOTTOM_ANCHOR . $rendered, $content);
3131                         } else {
3132                                 return $content . $rendered;
3133                         }
3134                 }
3135                 return $content;
3136         }
3137
3138         /**
3139          * Add non visual attachments to the content
3140          *
3141          * @param array $attachments
3142          * @param array $item
3143          * @param string $content
3144          * @return string modified content
3145          */
3146         private static function addNonVisualAttachments(array $attachments, array $item, string $content)
3147         {
3148                 DI::profiler()->startRecording('rendering');
3149                 $trailing = '';
3150                 foreach ($attachments['additional'] as $attachment) {
3151                         if (strpos($item['body'], $attachment['url'])) {
3152                                 continue;
3153                         }
3154
3155                         $author = ['uid' => 0, 'id' => $item['author-id'],
3156                                 'network' => $item['author-network'], 'url' => $item['author-link']];
3157                         $the_url = Contact::magicLinkByContact($author, $attachment['url']);
3158
3159                         $title = Strings::escapeHtml(trim(($attachment['description'] ?? '') ?: $attachment['url']));
3160
3161                         if (!empty($attachment['size'])) {
3162                                 $title .= ' ' . $attachment['size'] . ' ' . DI::l10n()->t('bytes');
3163                         }
3164
3165                         /// @todo Use a template
3166                         $icon = '<div class="attachtype icon s22 type-' . $attachment['filetype'] . ' subtype-' . $attachment['subtype'] . '"></div>';
3167                         $trailing .= '<a href="' . strip_tags($the_url) . '" title="' . $title . '" class="attachlink" target="_blank" rel="noopener noreferrer" >' . $icon . '</a>';
3168                 }
3169
3170                 if ($trailing != '') {
3171                         $content .= '<div class="body-attach">' . $trailing . '<div class="clear"></div></div>';
3172                 }
3173
3174                 DI::profiler()->stopRecording();
3175                 return $content;
3176         }
3177
3178         /**
3179          * get private link for item
3180          *
3181          * @param array $item
3182          * @return boolean|array False if item has not plink, otherwise array('href'=>plink url, 'title'=>translated title)
3183          * @throws \Exception
3184          */
3185         public static function getPlink($item)
3186         {
3187                 if (local_user()) {
3188                         $ret = [
3189                                 'href' => "display/" . $item['guid'],
3190                                 'orig' => "display/" . $item['guid'],
3191                                 'title' => DI::l10n()->t('View on separate page'),
3192                                 'orig_title' => DI::l10n()->t('View on separate page'),
3193                         ];
3194
3195                         if (!empty($item['plink'])) {
3196                                 $ret['href'] = DI::baseUrl()->remove($item['plink']);
3197                                 $ret['title'] = DI::l10n()->t('Link to source');
3198                         }
3199                 } elseif (!empty($item['plink']) && ($item['private'] != self::PRIVATE)) {
3200                         $ret = [
3201                                 'href' => $item['plink'],
3202                                 'orig' => $item['plink'],
3203                                 'title' => DI::l10n()->t('Link to source'),
3204                                 'orig_title' => DI::l10n()->t('Link to source'),
3205                         ];
3206                 } else {
3207                         $ret = [];
3208                 }
3209
3210                 return $ret;
3211         }
3212
3213         /**
3214          * Does the given uri-id belongs to a post that is sent as starting post to a forum?
3215          *
3216          * @param int $uri_id
3217          *
3218          * @return boolean "true" when it is a forum post
3219          */
3220         public static function isForumPost(int $uri_id)
3221         {
3222                 foreach (Tag::getByURIId($uri_id, [Tag::EXCLUSIVE_MENTION]) as $tag) {
3223                         if (DBA::exists('contact', ['uid' => 0, 'nurl' => Strings::normaliseLink($tag['url']), 'contact-type' => Contact::TYPE_COMMUNITY])) {
3224                                 return true;
3225                         }
3226                 }
3227                 return false;
3228         }
3229
3230         /**
3231          * Search item id for given URI or plink
3232          *
3233          * @param string $uri
3234          * @param integer $uid
3235          *
3236          * @return integer item id
3237          */
3238         public static function searchByLink($uri, $uid = 0)
3239         {
3240                 $ssl_uri = str_replace('http://', 'https://', $uri);
3241                 $uris = [$uri, $ssl_uri, Strings::normaliseLink($uri)];
3242
3243                 $item = Post::selectFirst(['id'], ['uri' => $uris, 'uid' => $uid]);
3244                 if (DBA::isResult($item)) {
3245                         return $item['id'];
3246                 }
3247
3248                 $item = Post::selectFirst(['id'], ['plink' => $uris, 'uid' => $uid]);
3249                 if (DBA::isResult($item)) {
3250                         return $item['id'];
3251                 }
3252
3253                 return 0;
3254         }
3255
3256         /**
3257          * Return the URI for a link to the post
3258          *
3259          * @param string $uri URI or link to post
3260          *
3261          * @return string URI
3262          */
3263         public static function getURIByLink(string $uri)
3264         {
3265                 $ssl_uri = str_replace('http://', 'https://', $uri);
3266                 $uris = [$uri, $ssl_uri, Strings::normaliseLink($uri)];
3267
3268                 $item = Post::selectFirst(['uri'], ['uri' => $uris]);
3269                 if (DBA::isResult($item)) {
3270                         return $item['uri'];
3271                 }
3272
3273                 $item = Post::selectFirst(['uri'], ['plink' => $uris]);
3274                 if (DBA::isResult($item)) {
3275                         return $item['uri'];
3276                 }
3277
3278                 return '';
3279         }
3280
3281         /**
3282          * Fetches item for given URI or plink
3283          *
3284          * @param string $uri
3285          * @param integer $uid
3286          *
3287          * @return integer item id
3288          */
3289         public static function fetchByLink(string $uri, int $uid = 0)
3290         {
3291                 Logger::info('Trying to fetch link', ['uid' => $uid, 'uri' => $uri]);
3292                 $item_id = self::searchByLink($uri, $uid);
3293                 if (!empty($item_id)) {
3294                         Logger::info('Link found', ['uid' => $uid, 'uri' => $uri, 'id' => $item_id]);
3295                         return $item_id;
3296                 }
3297
3298                 $hookData = [
3299                         'uri'     => $uri,
3300                         'uid'     => $uid,
3301                         'item_id' => null,
3302                 ];
3303
3304                 Hook::callAll('item_by_link', $hookData);
3305
3306                 if (isset($hookData['item_id'])) {
3307                         return is_numeric($hookData['item_id']) ? $hookData['item_id'] : 0;
3308                 }
3309
3310                 if ($fetched_uri = ActivityPub\Processor::fetchMissingActivity($uri)) {
3311                         $item_id = self::searchByLink($fetched_uri, $uid);
3312                 } else {
3313                         $item_id = Diaspora::fetchByURL($uri);
3314                 }
3315
3316                 if (!empty($item_id)) {
3317                         Logger::info('Link fetched', ['uid' => $uid, 'uri' => $uri, 'id' => $item_id]);
3318                         return $item_id;
3319                 }
3320
3321                 Logger::info('Link not found', ['uid' => $uid, 'uri' => $uri]);
3322                 return 0;
3323         }
3324
3325         /**
3326          * Return share data from an item array (if the item is shared item)
3327          * We are providing the complete Item array, because at some time in the future
3328          * we hopefully will define these values not in the body anymore but in some item fields.
3329          * This function is meant to replace all similar functions in the system.
3330          *
3331          * @param array $item
3332          *
3333          * @return array with share information
3334          */
3335         public static function getShareArray($item)
3336         {
3337                 if (!preg_match("/(.*?)\[share(.*?)\]\s?(.*?)\s?\[\/share\]\s?/ism", $item['body'], $matches)) {
3338                         return [];
3339                 }
3340
3341                 $attribute_string = $matches[2];
3342                 $attributes = ['comment' => trim($matches[1]), 'shared' => trim($matches[3])];
3343                 foreach (['author', 'profile', 'avatar', 'guid', 'posted', 'link'] as $field) {
3344                         if (preg_match("/$field=(['\"])(.+?)\\1/ism", $attribute_string, $matches)) {
3345                                 $attributes[$field] = trim(html_entity_decode($matches[2] ?? '', ENT_QUOTES, 'UTF-8'));
3346                         }
3347                 }
3348                 return $attributes;
3349         }
3350
3351         /**
3352          * Fetch item information for shared items from the original items and adds it.
3353          *
3354          * @param array $item
3355          *
3356          * @return array item array with data from the original item
3357          */
3358         public static function addShareDataFromOriginal(array $item)
3359         {
3360                 $shared = self::getShareArray($item);
3361                 if (empty($shared)) {
3362                         return $item;
3363                 }
3364
3365                 // Real reshares always have got a GUID.
3366                 if (empty($shared['guid'])) {
3367                         return $item;
3368                 }
3369
3370                 $uid = $item['uid'] ?? 0;
3371
3372                 // first try to fetch the item via the GUID. This will work for all reshares that had been created on this system
3373                 $shared_item = Post::selectFirst(['title', 'body'], ['guid' => $shared['guid'], 'uid' => [0, $uid]]);
3374                 if (!DBA::isResult($shared_item)) {
3375                         if (empty($shared['link'])) {
3376                                 return $item;
3377                         }
3378
3379                         // Otherwhise try to find (and possibly fetch) the item via the link. This should work for Diaspora and ActivityPub posts
3380                         $id = self::fetchByLink($shared['link'] ?? '', $uid);
3381                         if (empty($id)) {
3382                                 Logger::info('Original item not found', ['url' => $shared['link'] ?? '', 'callstack' => System::callstack()]);
3383                                 return $item;
3384                         }
3385
3386                         $shared_item = Post::selectFirst(['title', 'body'], ['id' => $id]);
3387                         if (!DBA::isResult($shared_item)) {
3388                                 return $item;
3389                         }
3390                         Logger::info('Got shared data from url', ['url' => $shared['link'], 'callstack' => System::callstack()]);
3391                 } else {
3392                         Logger::info('Got shared data from guid', ['guid' => $shared['guid'], 'callstack' => System::callstack()]);
3393                 }
3394
3395                 if (!empty($shared_item['title'])) {
3396                         $body = '[h3]' . $shared_item['title'] . "[/h3]\n" . $shared_item['body'];
3397                         unset($shared_item['title']);
3398                 } else {
3399                         $body = $shared_item['body'];
3400                 }
3401
3402                 $item['body'] = preg_replace("/\[share ([^\[\]]*)\].*\[\/share\]/ism", '[share $1]' . str_replace('$', '\$', $body) . '[/share]', $item['body']);
3403                 unset($shared_item['body']);
3404
3405                 return array_merge($item, $shared_item);
3406         }
3407
3408         /**
3409          * Check a prospective item array against user-level permissions
3410          *
3411          * @param array $item Expected keys: uri, gravity, and
3412          *                    author-link if is author-id is set,
3413          *                    owner-link if is owner-id is set,
3414          *                    causer-link if is causer-id is set.
3415          * @param int   $user_id Local user ID
3416          * @return bool
3417          * @throws \Exception
3418          */
3419         protected static function isAllowedByUser(array $item, int $user_id)
3420         {
3421                 if (!empty($item['author-id']) && Contact\User::isBlocked($item['author-id'], $user_id)) {
3422                         Logger::notice('Author is blocked by user', ['author-link' => $item['author-link'], 'uid' => $user_id, 'item-uri' => $item['uri']]);
3423                         return false;
3424                 }
3425
3426                 if (!empty($item['owner-id']) && Contact\User::isBlocked($item['owner-id'], $user_id)) {
3427                         Logger::notice('Owner is blocked by user', ['owner-link' => $item['owner-link'], 'uid' => $user_id, 'item-uri' => $item['uri']]);
3428                         return false;
3429                 }
3430
3431                 // The causer is set during a thread completion, for example because of a reshare. It countains the responsible actor.
3432                 if (!empty($item['causer-id']) && Contact\User::isBlocked($item['causer-id'], $user_id)) {
3433                         Logger::notice('Causer is blocked by user', ['causer-link' => $item['causer-link'] ?? $item['causer-id'], 'uid' => $user_id, 'item-uri' => $item['uri']]);
3434                         return false;
3435                 }
3436
3437                 if (!empty($item['causer-id']) && ($item['gravity'] === GRAVITY_PARENT) && Contact\User::isIgnored($item['causer-id'], $user_id)) {
3438                         Logger::notice('Causer is ignored by user', ['causer-link' => $item['causer-link'] ?? $item['causer-id'], 'uid' => $user_id, 'item-uri' => $item['uri']]);
3439                         return false;
3440                 }
3441
3442                 return true;
3443         }
3444
3445         /**
3446          * Improve the data in shared posts
3447          *
3448          * @param array $item
3449          * @return string body
3450          */
3451         public static function improveSharedDataInBody(array $item)
3452         {
3453                 $shared = BBCode::fetchShareAttributes($item['body']);
3454                 if (empty($shared['link'])) {
3455                         return $item['body'];
3456                 }
3457
3458                 $id = self::fetchByLink($shared['link']);
3459                 Logger::info('Fetched shared post', ['uri-id' => $item['uri-id'], 'id' => $id, 'author' => $shared['profile'], 'url' => $shared['link'], 'guid' => $shared['guid'], 'callstack' => System::callstack()]);
3460                 if (!$id) {
3461                         return $item['body'];
3462                 }
3463
3464                 $shared_item = Post::selectFirst(['author-name', 'author-link', 'author-avatar', 'plink', 'created', 'guid', 'title', 'body'], ['id' => $id]);
3465                 if (!DBA::isResult($shared_item)) {
3466                         return $item['body'];
3467                 }
3468
3469                 $shared_content = BBCode::getShareOpeningTag($shared_item['author-name'], $shared_item['author-link'], $shared_item['author-avatar'], $shared_item['plink'], $shared_item['created'], $shared_item['guid']);
3470
3471                 if (!empty($shared_item['title'])) {
3472                         $shared_content .= '[h3]'.$shared_item['title'].'[/h3]'."\n";
3473                 }
3474
3475                 $shared_content .= $shared_item['body'];
3476
3477                 $item['body'] = preg_replace("/\[share.*?\](.*)\[\/share\]/ism", $shared_content . '[/share]', $item['body']);
3478                 Logger::info('New shared data', ['uri-id' => $item['uri-id'], 'id' => $id, 'shared_item' => $shared_item]);
3479                 return $item['body'];
3480         }
3481 }