src/Model/Item.php

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