src/Model/Item.php

   1 <?php
   2 /**
   3  * @copyright Copyright (C) 2010-2022, the Friendica project
   4  *
   5  * @license GNU AGPL version 3 or any later version
   6  *
   7  * This program is free software: you can redistribute it and/or modify
   8  * it under the terms of the GNU Affero General Public License as
   9  * published by the Free Software Foundation, either version 3 of the
  10  * License, or (at your option) any later version.
  11  *
  12  * This program is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  * GNU Affero General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU Affero General Public License
  18  * along with this program.  If not, see <https://www.gnu.org/licenses/>.
  19  *
  20  */
  21
  22 namespace Friendica\Model;
  23
  24 use Friendica\Content\Text\BBCode;
  25 use Friendica\Content\Text\HTML;
  26 use Friendica\Core\Hook;
  27 use Friendica\Core\Logger;
  28 use Friendica\Core\Protocol;
  29 use Friendica\Core\Renderer;
  30 use Friendica\Core\Session;
  31 use Friendica\Core\System;
  32 use Friendica\Model\Tag;
  33 use Friendica\Core\Worker;
  34 use Friendica\Database\DBA;
  35 use Friendica\DI;
  36 use Friendica\Model\Post;
  37 use Friendica\Protocol\Activity;
  38 use Friendica\Protocol\ActivityPub;
  39 use Friendica\Protocol\Diaspora;
  40 use Friendica\Util\DateTimeFormat;
  41 use Friendica\Util\Map;
  42 use Friendica\Util\Network;
  43 use Friendica\Util\Proxy;
  44 use Friendica\Util\Strings;
  45 use Friendica\Worker\Delivery;
  46 use LanguageDetection\Language;
  47
  48 class Item
  49 {
  50         // Posting types, inspired by https://www.w3.org/TR/activitystreams-vocabulary/#object-types
  51         const PT_ARTICLE = 0;
  52         const PT_NOTE = 1;
  53         const PT_PAGE = 2;
  54         const PT_IMAGE = 16;
  55         const PT_AUDIO = 17;
  56         const PT_VIDEO = 18;
  57         const PT_DOCUMENT = 19;
  58         const PT_EVENT = 32;
  59         const PT_POLL = 33;
  60         const PT_PERSONAL_NOTE = 128;
  61
  62         // Posting reasons (Why had a post been stored for a user?)
  63         const PR_NONE = 0;
  64         const PR_TAG = 64;
  65         const PR_TO = 65;
  66         const PR_CC = 66;
  67         const PR_BTO = 67;
  68         const PR_BCC = 68;
  69         const PR_FOLLOWER = 69;
  70         const PR_ANNOUNCEMENT = 70;
  71         const PR_COMMENT = 71;
  72         const PR_STORED = 72;
  73         const PR_GLOBAL = 73;
  74         const PR_RELAY = 74;
  75         const PR_FETCHED = 75;
  76
  77         // Field list that is used to display the items
  78         const DISPLAY_FIELDLIST = [
  79                 'uid', 'id', 'parent', 'guid', 'network', 'gravity',
  80                 'uri-id', 'uri', 'thr-parent-id', 'thr-parent', 'parent-uri-id', 'parent-uri',
  81                 'commented', 'created', 'edited', 'received', 'verb', 'object-type', 'postopts', 'plink',
  82                 'wall', 'private', 'starred', 'origin', 'parent-origin', 'title', 'body', 'language',
  83                 'content-warning', 'location', 'coord', 'app', 'rendered-hash', 'rendered-html', 'object',
  84                 'allow_cid', 'allow_gid', 'deny_cid', 'deny_gid', 'mention', 'global',
  85                 'author-id', 'author-link', 'author-name', 'author-avatar', 'author-network',
  86                 'owner-id', 'owner-link', 'owner-name', 'owner-avatar', 'owner-network', 'owner-contact-type',
  87                 'causer-id', 'causer-link', 'causer-name', 'causer-avatar', 'causer-contact-type', 'causer-network',
  88                 'contact-id', 'contact-uid', 'contact-link', 'contact-name', 'contact-avatar',
  89                 'writable', 'self', 'cid', 'alias',
  90                 'event-created', 'event-edited', 'event-start', 'event-finish',
  91                 'event-summary', 'event-desc', 'event-location', 'event-type',
  92                 'event-nofinish', 'event-ignore', 'event-id',
  93                 'delivery_queue_count', 'delivery_queue_done', 'delivery_queue_failed'
  94         ];
  95
  96         // Field list that is used to deliver items via the protocols
  97         const DELIVER_FIELDLIST = ['uid', 'id', 'parent', 'uri-id', 'uri', 'thr-parent', 'parent-uri', 'guid',
  98                         'parent-guid', 'received', 'created', 'edited', 'verb', 'object-type', 'object', 'target',
  99                         'private', 'title', 'body', 'raw-body', 'location', 'coord', 'app',
 100                         'inform', 'deleted', 'extid', 'post-type', 'post-reason', 'gravity',
 101                         'allow_cid', 'allow_gid', 'deny_cid', 'deny_gid',
 102                         'author-id', 'author-link', 'author-name', 'author-avatar', 'owner-id', 'owner-link', 'contact-uid',
 103                         'signed_text', 'network', 'wall', 'contact-id', 'plink', 'origin',
 104                         'thr-parent-id', 'parent-uri-id', 'postopts', 'pubmail',
 105                         'event-created', 'event-edited', 'event-start', 'event-finish',
 106                         'event-summary', 'event-desc', 'event-location', 'event-type',
 107                         'event-nofinish', 'event-ignore', 'event-id'];
 108
 109         // All fields in the item table
 110         const ITEM_FIELDLIST = ['id', 'uid', 'parent', 'uri', 'parent-uri', 'thr-parent',
 111                         'guid', 'uri-id', 'parent-uri-id', 'thr-parent-id', 'vid',
 112                         'contact-id', 'wall', 'gravity', 'extid', 'psid',
 113                         'created', 'edited', 'commented', 'received', 'changed', 'verb',
 114                         'postopts', 'plink', 'resource-id', 'event-id', 'inform',
 115                         'allow_cid', 'allow_gid', 'deny_cid', 'deny_gid', 'post-type', 'post-reason',
 116                         'private', 'pubmail', 'visible', 'starred',
 117                         'unseen', 'deleted', 'origin', 'mention', 'global', 'network',
 118                         'title', 'content-warning', 'body', 'location', 'coord', 'app',
 119                         'rendered-hash', 'rendered-html', 'object-type', 'object', 'target-type', 'target',
 120                         'author-id', 'author-link', 'author-name', 'author-avatar', 'author-network',
 121                         'owner-id', 'owner-link', 'owner-name', 'owner-avatar', 'causer-id'];
 122
 123         // List of all verbs that don't need additional content data.
 124         // Never reorder or remove entries from this list. Just add new ones at the end, if needed.
 125         const ACTIVITIES = [
 126                 Activity::LIKE, Activity::DISLIKE,
 127                 Activity::ATTEND, Activity::ATTENDNO, Activity::ATTENDMAYBE,
 128                 Activity::FOLLOW,
 129                 Activity::ANNOUNCE];
 130
 131         const PUBLIC = 0;
 132         const PRIVATE = 1;
 133         const UNLISTED = 2;
 134
 135         /**
 136          * Update existing item entries
 137          *
 138          * @param array $fields    The fields that are to be changed
 139          * @param array $condition The condition for finding the item entries
 140          *
 141          * In the future we may have to change permissions as well.
 142          * Then we had to add the user id as third parameter.
 143          *
 144          * A return value of "0" doesn't mean an error - but that 0 rows had been changed.
 145          *
 146          * @return integer|boolean number of affected rows - or "false" if there was an error
 147          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 148          */
 149         public static function update(array $fields, array $condition)
 150         {
 151                 if (empty($condition) || empty($fields)) {
 152                         return false;
 153                 }
 154
 155                 if (isset($fields['extid'])) {
 156                         $fields['external-id'] = ItemURI::getIdByURI($fields['extid']);
 157                 }
 158
 159                 if (!empty($fields['verb'])) {
 160                         $fields['vid'] = Verb::getID($fields['verb']);
 161                 }
 162
 163                 if (!empty($fields['edited'])) {
 164                         $previous = Post::selectFirst(['edited'], $condition);
 165                 }
 166
 167                 $rows = Post::update($fields, $condition);
 168                 if (is_bool($rows)) {
 169                         return $rows;
 170                 }
 171
 172                 // We only need to call the line by line update for specific fields
 173                 if (empty($fields['body']) && empty($fields['file']) &&
 174                         empty($fields['attach']) && empty($fields['edited'])) {
 175                         return $rows;
 176                 }
 177
 178                 Logger::info('Updating per single row method', ['fields' => $fields, 'condition' => $condition]);
 179
 180                 $items = Post::select(['id', 'origin', 'uri-id', 'uid', 'author-network'], $condition);
 181
 182                 $notify_items = [];
 183
 184                 while ($item = DBA::fetch($items)) {
 185                         if (!empty($fields['body'])) {
 186                                 Post\Media::insertFromAttachmentData($item['uri-id'], $fields['body']);
 187
 188                                 $content_fields = ['raw-body' => trim($fields['raw-body'] ?? $fields['body'])];
 189
 190                                 // Remove all media attachments from the body and store them in the post-media table
 191                                 // @todo On shared postings (Diaspora style and commented reshare) don't fetch content from the shared part
 192                                 $content_fields['raw-body'] = Post\Media::insertFromBody($item['uri-id'], $content_fields['raw-body']);
 193                                 $content_fields['raw-body'] = self::setHashtags($content_fields['raw-body']);
 194
 195                                 if ($item['author-network'] != Protocol::DFRN) {
 196                                         Post\Media::insertFromRelevantUrl($item['uri-id'], $content_fields['raw-body']);
 197                                 }
 198
 199                                 Post\Content::update($item['uri-id'], $content_fields);
 200                         }
 201
 202                         if (!empty($fields['file'])) {
 203                                 Post\Category::storeTextByURIId($item['uri-id'], $item['uid'], $fields['file']);
 204                         }
 205
 206                         if (!empty($fields['attach'])) {
 207                                 Post\Media::insertFromAttachment($item['uri-id'], $fields['attach']);
 208                         }
 209
 210                         // We only need to notfiy others when it is an original entry from us.
 211                         // Only call the notifier when the item had been edited and records had been changed.
 212                         if ($item['origin'] && !empty($fields['edited']) && ($previous['edited'] != $fields['edited'])) {
 213                                 $notify_items[] = $item['id'];
 214                         }
 215                 }
 216
 217                 DBA::close($items);
 218
 219                 foreach ($notify_items as $notify_item) {
 220                         $post = Post::selectFirst(['uri-id', 'uid'], ['id' => $notify_item]);
 221                         Worker::add(PRIORITY_HIGH, "Notifier", Delivery::POST, (int)$post['uri-id'], (int)$post['uid']);
 222                 }
 223
 224                 return $rows;
 225         }
 226
 227         /**
 228          * Delete an item and notify others about it - if it was ours
 229          *
 230          * @param array   $condition The condition for finding the item entries
 231          * @param integer $priority  Priority for the notification
 232          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 233          */
 234         public static function markForDeletion($condition, $priority = PRIORITY_HIGH)
 235         {
 236                 $items = Post::select(['id'], $condition);
 237                 while ($item = Post::fetch($items)) {
 238                         self::markForDeletionById($item['id'], $priority);
 239                 }
 240                 DBA::close($items);
 241         }
 242
 243         /**
 244          * Delete an item for an user and notify others about it - if it was ours
 245          *
 246          * @param array   $condition The condition for finding the item entries
 247          * @param integer $uid       User who wants to delete this item
 248          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 249          */
 250         public static function deleteForUser($condition, $uid)
 251         {
 252                 if ($uid == 0) {
 253                         return;
 254                 }
 255
 256                 $items = Post::select(['id', 'uid', 'uri-id'], $condition);
 257                 while ($item = Post::fetch($items)) {
 258                         if (in_array($item['uid'], [$uid, 0])) {
 259                                 Post\User::update($item['uri-id'], $uid, ['hidden' => true], true);
 260                                 Post\ThreadUser::update($item['uri-id'], $uid, ['hidden' => true], true);
 261                         }
 262
 263                         if ($item['uid'] == $uid) {
 264                                 self::markForDeletionById($item['id'], PRIORITY_HIGH);
 265                         } elseif ($item['uid'] != 0) {
 266                                 Logger::notice('Wrong ownership. Not deleting item', ['id' => $item['id']]);
 267                         }
 268                 }
 269                 DBA::close($items);
 270         }
 271
 272         /**
 273          * Mark an item for deletion, delete related data and notify others about it - if it was ours
 274          *
 275          * @param integer $item_id
 276          * @param integer $priority Priority for the notification
 277          *
 278          * @return boolean success
 279          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 280          */
 281         public static function markForDeletionById($item_id, $priority = PRIORITY_HIGH)
 282         {
 283                 Logger::info('Mark item for deletion by id', ['id' => $item_id, 'callstack' => System::callstack()]);
 284                 // locate item to be deleted
 285                 $fields = ['id', 'uri', 'uri-id', 'uid', 'parent', 'parent-uri-id', 'origin',
 286                         'deleted', 'resource-id', 'event-id',
 287                         'verb', 'object-type', 'object', 'target', 'contact-id', 'psid', 'gravity'];
 288                 $item = Post::selectFirst($fields, ['id' => $item_id]);
 289                 if (!DBA::isResult($item)) {
 290                         Logger::info('Item not found.', ['id' => $item_id]);
 291                         return false;
 292                 }
 293
 294                 if ($item['deleted']) {
 295                         Logger::info('Item has already been marked for deletion.', ['id' => $item_id]);
 296                         return false;
 297                 }
 298
 299                 $parent = Post::selectFirst(['origin'], ['id' => $item['parent']]);
 300                 if (!DBA::isResult($parent)) {
 301                         $parent = ['origin' => false];
 302                 }
 303
 304                 // clean up categories and tags so they don't end up as orphans
 305                 Post\Category::deleteByURIId($item['uri-id'], $item['uid']);
 306
 307                 /*
 308                  * If item is a link to a photo resource, nuke all the associated photos
 309                  * (visitors will not have photo resources)
 310                  * This only applies to photos uploaded from the photos page. Photos inserted into a post do not
 311                  * generate a resource-id and therefore aren't intimately linked to the item.
 312                  */
 313                 /// @TODO: this should first check if photo is used elsewhere
 314                 if (strlen($item['resource-id'])) {
 315                         Photo::delete(['resource-id' => $item['resource-id'], 'uid' => $item['uid']]);
 316                 }
 317
 318                 // If item is a link to an event, delete the event.
 319                 if (intval($item['event-id'])) {
 320                         Event::delete($item['event-id']);
 321                 }
 322
 323                 // If item has attachments, drop them
 324                 $attachments = Post\Media::getByURIId($item['uri-id'], [Post\Media::DOCUMENT]);
 325                 foreach($attachments as $attachment) {
 326                         if (preg_match("|attach/(\d+)|", $attachment['url'], $matches)) {
 327                                 Attach::delete(['id' => $matches[1], 'uid' => $item['uid']]);
 328                         }
 329                 }
 330
 331                 // Set the item to "deleted"
 332                 $item_fields = ['deleted' => true, 'edited' => DateTimeFormat::utcNow(), 'changed' => DateTimeFormat::utcNow()];
 333                 Post::update($item_fields, ['id' => $item['id']]);
 334
 335                 Post\Category::storeTextByURIId($item['uri-id'], $item['uid'], '');
 336
 337                 if (!Post::exists(["`uri-id` = ? AND `uid` != 0 AND NOT `deleted`", $item['uri-id']])) {
 338                         self::markForDeletion(['uri-id' => $item['uri-id'], 'uid' => 0, 'deleted' => false], $priority);
 339                 }
 340
 341                 Post\DeliveryData::delete($item['uri-id']);
 342
 343                 // If it's the parent of a comment thread, kill all the kids
 344                 if ($item['gravity'] == GRAVITY_PARENT) {
 345                         self::markForDeletion(['parent' => $item['parent'], 'deleted' => false], $priority);
 346                 }
 347
 348                 // Is it our comment and/or our thread?
 349                 if (($item['origin'] || $parent['origin']) && ($item['uid'] != 0)) {
 350                         // When we delete the original post we will delete all existing copies on the server as well
 351                         self::markForDeletion(['uri-id' => $item['uri-id'], 'deleted' => false], $priority);
 352
 353                         // send the notification upstream/downstream
 354                         if ($priority) {
 355                                 Worker::add(['priority' => $priority, 'dont_fork' => true], "Notifier", Delivery::DELETION, (int)$item['uri-id'], (int)$item['uid']);
 356                         }
 357                 } elseif ($item['uid'] != 0) {
 358                         Post\User::update($item['uri-id'], $item['uid'], ['hidden' => true]);
 359                         Post\ThreadUser::update($item['uri-id'], $item['uid'], ['hidden' => true]);
 360                 }
 361
 362                 Logger::info('Item has been marked for deletion.', ['id' => $item_id]);
 363
 364                 return true;
 365         }
 366
 367         public static function guid($item, $notify)
 368         {
 369                 if (!empty($item['guid'])) {
 370                         return trim($item['guid']);
 371                 }
 372
 373                 if ($notify) {
 374                         // We have to avoid duplicates. So we create the GUID in form of a hash of the plink or uri.
 375                         // We add the hash of our own host because our host is the original creator of the post.
 376                         $prefix_host = DI::baseUrl()->getHostname();
 377                 } else {
 378                         $prefix_host = '';
 379
 380                         // We are only storing the post so we create a GUID from the original hostname.
 381                         if (!empty($item['author-link'])) {
 382                                 $parsed = parse_url($item['author-link']);
 383                                 if (!empty($parsed['host'])) {
 384                                         $prefix_host = $parsed['host'];
 385                                 }
 386                         }
 387
 388                         if (empty($prefix_host) && !empty($item['plink'])) {
 389                                 $parsed = parse_url($item['plink']);
 390                                 if (!empty($parsed['host'])) {
 391                                         $prefix_host = $parsed['host'];
 392                                 }
 393                         }
 394
 395                         if (empty($prefix_host) && !empty($item['uri'])) {
 396                                 $parsed = parse_url($item['uri']);
 397                                 if (!empty($parsed['host'])) {
 398                                         $prefix_host = $parsed['host'];
 399                                 }
 400                         }
 401
 402                         // Is it in the format data@host.tld? - Used for mail contacts
 403                         if (empty($prefix_host) && !empty($item['author-link']) && strstr($item['author-link'], '@')) {
 404                                 $mailparts = explode('@', $item['author-link']);
 405                                 $prefix_host = array_pop($mailparts);
 406                         }
 407                 }
 408
 409                 if (!empty($item['plink'])) {
 410                         $guid = self::guidFromUri($item['plink'], $prefix_host);
 411                 } elseif (!empty($item['uri'])) {
 412                         $guid = self::guidFromUri($item['uri'], $prefix_host);
 413                 } else {
 414                         $guid = System::createUUID(hash('crc32', $prefix_host));
 415                 }
 416
 417                 return $guid;
 418         }
 419
 420         private static function contactId($item)
 421         {
 422                 if (!empty($item['contact-id']) && DBA::exists('contact', ['self' => true, 'id' => $item['contact-id']])) {
 423                         return $item['contact-id'];
 424                 } elseif (($item['gravity'] == GRAVITY_PARENT) && !empty($item['uid']) && !empty($item['contact-id']) && Contact::isSharing($item['contact-id'], $item['uid'])) {
 425                         return $item['contact-id'];
 426                 } elseif (!empty($item['uid']) && !Contact::isSharing($item['author-id'], $item['uid'])) {
 427                         return $item['author-id'];
 428                 } elseif (!empty($item['contact-id'])) {
 429                         return $item['contact-id'];
 430                 } else {
 431                         $contact_id = Contact::getIdForURL($item['author-link'], $item['uid']);
 432                         if (!empty($contact_id)) {
 433                                 return $contact_id;
 434                         }
 435                 }
 436                 return $item['author-id'];
 437         }
 438
 439         /**
 440          * Write an item array into a spool file to be inserted later.
 441          * This command is called whenever there are issues storing an item.
 442          *
 443          * @param array $item The item fields that are to be inserted
 444          * @throws \Exception
 445          */
 446         private static function spool($orig_item)
 447         {
 448                 // Now we store the data in the spool directory
 449                 // We use "microtime" to keep the arrival order and "mt_rand" to avoid duplicates
 450                 $file = 'item-' . round(microtime(true) * 10000) . '-' . mt_rand() . '.msg';
 451
 452                 $spoolpath = System::getSpoolPath();
 453                 if ($spoolpath != "") {
 454                         $spool = $spoolpath . '/' . $file;
 455
 456                         file_put_contents($spool, json_encode($orig_item));
 457                         Logger::warning("Item wasn't stored - Item was spooled into file", ['file' => $file]);
 458                 }
 459         }
 460
 461         /**
 462          * Check if the item array is a duplicate
 463          *
 464          * @param array $item
 465          * @return boolean is it a duplicate?
 466          */
 467         private static function isDuplicate(array $item)
 468         {
 469                 // Checking if there is already an item with the same guid
 470                 $condition = ['guid' => $item['guid'], 'network' => $item['network'], 'uid' => $item['uid']];
 471                 if (Post::exists($condition)) {
 472                         Logger::notice('Found already existing item', $condition);
 473                         return true;
 474                 }
 475
 476                 $condition = ['uri-id' => $item['uri-id'], 'uid' => $item['uid'],
 477                         'network' => [$item['network'], Protocol::DFRN]];
 478                 if (Post::exists($condition)) {
 479                         Logger::notice('duplicated item with the same uri found.', $condition);
 480                         return true;
 481                 }
 482
 483                 // On Friendica and Diaspora the GUID is unique
 484                 if (in_array($item['network'], [Protocol::DFRN, Protocol::DIASPORA])) {
 485                         $condition = ['guid' => $item['guid'], 'uid' => $item['uid']];
 486                         if (Post::exists($condition)) {
 487                                 Logger::notice('duplicated item with the same guid found.', $condition);
 488                                 return true;
 489                         }
 490                 } elseif ($item['network'] == Protocol::OSTATUS) {
 491                         // Check for an existing post with the same content. There seems to be a problem with OStatus.
 492                         $condition = ["`body` = ? AND `network` = ? AND `created` = ? AND `contact-id` = ? AND `uid` = ?",
 493                                         $item['body'], $item['network'], $item['created'], $item['contact-id'], $item['uid']];
 494                         if (Post::exists($condition)) {
 495                                 Logger::notice('duplicated item with the same body found.', $item);
 496                                 return true;
 497                         }
 498                 }
 499
 500                 /*
 501                  * Check for already added items.
 502                  * There is a timing issue here that sometimes creates double postings.
 503                  * An unique index would help - but the limitations of MySQL (maximum size of index values) prevent this.
 504                  */
 505                 if (($item['uid'] == 0) && Post::exists(['uri-id' => $item['uri-id'], 'uid' => 0])) {
 506                         Logger::notice('Global item already stored.', ['uri-id' => $item['uri-id'], 'network' => $item['network']]);
 507                         return true;
 508                 }
 509
 510                 return false;
 511         }
 512
 513         /**
 514          * Check if the item array is valid
 515          *
 516          * @param array $item
 517          * @return boolean item is valid
 518          */
 519         public static function isValid(array $item)
 520         {
 521                 // When there is no content then we don't post it
 522                 if (($item['body'] . $item['title'] == '') && (empty($item['uri-id']) || !Post\Media::existsByURIId($item['uri-id']))) {
 523                         Logger::notice('No body, no title.');
 524                         return false;
 525                 }
 526
 527                 if (!empty($item['uid'])) {
 528                         $owner = User::getOwnerDataById($item['uid'], false);
 529                         if (!$owner) {
 530                                 Logger::notice('Missing item user owner data', ['uid' => $item['uid']]);
 531                                 return false;
 532                         }
 533
 534                         if ($owner['account_expired'] || $owner['account_removed']) {
 535                                 Logger::notice('Item user has been deleted/expired/removed', ['uid' => $item['uid'], 'deleted' => $owner['deleted'], 'account_expired' => $owner['account_expired'], 'account_removed' => $owner['account_removed']]);
 536                                 return false;
 537                         }
 538                 }
 539
 540                 if (!empty($item['author-id']) && Contact::isBlocked($item['author-id'])) {
 541                         Logger::notice('Author is blocked node-wide', ['author-link' => $item['author-link'], 'item-uri' => $item['uri']]);
 542                         return false;
 543                 }
 544
 545                 if (!empty($item['author-link']) && Network::isUrlBlocked($item['author-link'])) {
 546                         Logger::notice('Author server is blocked', ['author-link' => $item['author-link'], 'item-uri' => $item['uri']]);
 547                         return false;
 548                 }
 549
 550                 if (!empty($item['owner-id']) && Contact::isBlocked($item['owner-id'])) {
 551                         Logger::notice('Owner is blocked node-wide', ['owner-link' => $item['owner-link'], 'item-uri' => $item['uri']]);
 552                         return false;
 553                 }
 554
 555                 if (!empty($item['owner-link']) && Network::isUrlBlocked($item['owner-link'])) {
 556                         Logger::notice('Owner server is blocked', ['owner-link' => $item['owner-link'], 'item-uri' => $item['uri']]);
 557                         return false;
 558                 }
 559
 560                 if (!empty($item['uid']) && !self::isAllowedByUser($item, $item['uid'])) {
 561                         return false;
 562                 }
 563
 564                 if ($item['verb'] == Activity::FOLLOW) {
 565                         if (!$item['origin'] && ($item['author-id'] == Contact::getPublicIdByUserId($item['uid']))) {
 566                                 // Our own follow request can be relayed to us. We don't store it to avoid notification chaos.
 567                                 Logger::info("Follow: Don't store not origin follow request", ['parent-uri' => $item['parent-uri']]);
 568                                 return false;
 569                         }
 570
 571                         $condition = ['verb' => Activity::FOLLOW, 'uid' => $item['uid'],
 572                                 'parent-uri' => $item['parent-uri'], 'author-id' => $item['author-id']];
 573                         if (Post::exists($condition)) {
 574                                 // It happens that we receive multiple follow requests by the same author - we only store one.
 575                                 Logger::info('Follow: Found existing follow request from author', ['author-id' => $item['author-id'], 'parent-uri' => $item['parent-uri']]);
 576                                 return false;
 577                         }
 578                 }
 579
 580                 return true;
 581         }
 582
 583         /**
 584          * Check if the item array is too old
 585          *
 586          * @param array $item
 587          * @return boolean item is too old
 588          */
 589         public static function isTooOld(array $item)
 590         {
 591                 // check for create date and expire time
 592                 $expire_interval = DI::config()->get('system', 'dbclean-expire-days', 0);
 593
 594                 $user = DBA::selectFirst('user', ['expire'], ['uid' => $item['uid']]);
 595                 if (DBA::isResult($user) && ($user['expire'] > 0) && (($user['expire'] < $expire_interval) || ($expire_interval == 0))) {
 596                         $expire_interval = $user['expire'];
 597                 }
 598
 599                 if (($expire_interval > 0) && !empty($item['created'])) {
 600                         $expire_date = time() - ($expire_interval * 86400);
 601                         $created_date = strtotime($item['created']);
 602                         if ($created_date < $expire_date) {
 603                                 Logger::notice('Item created before expiration interval.', [
 604                                         'created' => date('c', $created_date),
 605                                         'expired' => date('c', $expire_date),
 606                                         '$item' => $item
 607                                 ]);
 608                                 return true;
 609                         }
 610                 }
 611
 612                 return false;
 613         }
 614
 615         /**
 616          * Return the id of the given item array if it has been stored before
 617          *
 618          * @param array $item
 619          * @return integer item id
 620          */
 621         private static function getDuplicateID(array $item)
 622         {
 623                 if (empty($item['network']) || in_array($item['network'], Protocol::FEDERATED)) {
 624                         $condition = ["`uri-id` = ? AND `uid` = ? AND `network` IN (?, ?, ?, ?)",
 625                                 $item['uri-id'], $item['uid'],
 626                                 Protocol::ACTIVITYPUB, Protocol::DIASPORA, Protocol::DFRN, Protocol::OSTATUS];
 627                         $existing = Post::selectFirst(['id', 'network'], $condition);
 628                         if (DBA::isResult($existing)) {
 629                                 // We only log the entries with a different user id than 0. Otherwise we would have too many false positives
 630                                 if ($item['uid'] != 0) {
 631                                         Logger::notice('Item already existed for user', [
 632                                                 'uri-id' => $item['uri-id'],
 633                                                 'uid' => $item['uid'],
 634                                                 'network' => $item['network'],
 635                                                 'existing_id' => $existing["id"],
 636                                                 'existing_network' => $existing["network"]
 637                                         ]);
 638                                 }
 639
 640                                 return $existing["id"];
 641                         }
 642                 }
 643                 return 0;
 644         }
 645
 646         /**
 647          * Fetch top-level parent data for the given item array
 648          *
 649          * @param array $item
 650          * @return array item array with parent data
 651          * @throws \Exception
 652          */
 653         private static function getTopLevelParent(array $item)
 654         {
 655                 $fields = ['uid', 'uri', 'parent-uri', 'id', 'deleted',
 656                         'uri-id', 'parent-uri-id',
 657                         'allow_cid', 'allow_gid', 'deny_cid', 'deny_gid',
 658                         'wall', 'private', 'origin', 'author-id'];
 659                 $condition = ['uri-id' => $item['thr-parent-id'], 'uid' => $item['uid']];
 660                 $params = ['order' => ['id' => false]];
 661                 $parent = Post::selectFirst($fields, $condition, $params);
 662
 663                 if (!DBA::isResult($parent) && $item['origin']) {
 664                         $stored = Item::storeForUserByUriId($item['thr-parent-id'], $item['uid']);
 665                         Logger::info('Stored thread parent item for user', ['uri-id' => $item['thr-parent-id'], 'uid' => $item['uid'], 'stored' => $stored]);
 666                         $parent = Post::selectFirst($fields, $condition, $params);
 667                 }
 668
 669                 if (!DBA::isResult($parent)) {
 670                         Logger::notice('item parent was not found - ignoring item', ['thr-parent-id' => $item['thr-parent-id'], 'uid' => $item['uid']]);
 671                         return [];
 672                 }
 673
 674                 if ($parent['uri-id'] == $parent['parent-uri-id']) {
 675                         return $parent;
 676                 }
 677
 678                 $condition = ['uri-id' => $parent['parent-uri-id'],
 679                         'parent-uri-id' => $parent['parent-uri-id'],
 680                         'uid' => $parent['uid']];
 681                 $params = ['order' => ['id' => false]];
 682                 $toplevel_parent = Post::selectFirst($fields, $condition, $params);
 683
 684                 if (!DBA::isResult($toplevel_parent) && $item['origin']) {
 685                         $stored = Item::storeForUserByUriId($item['parent-uri-id'], $item['uid']);
 686                         Logger::info('Stored parent item for user', ['uri-id' => $item['parent-uri-id'], 'uid' => $item['uid'], 'stored' => $stored]);
 687                         $toplevel_parent = Post::selectFirst($fields, $condition, $params);
 688                 }
 689
 690                 if (!DBA::isResult($toplevel_parent)) {
 691                         Logger::notice('item top level parent was not found - ignoring item', ['parent-uri-id' => $parent['parent-uri-id'], 'uid' => $parent['uid']]);
 692                         return [];
 693                 }
 694
 695                 return $toplevel_parent;
 696         }
 697
 698         /**
 699          * Get the gravity for the given item array
 700          *
 701          * @param array $item
 702          * @return integer gravity
 703          */
 704         private static function getGravity(array $item)
 705         {
 706                 $activity = DI::activity();
 707
 708                 if (isset($item['gravity'])) {
 709                         return intval($item['gravity']);
 710                 } elseif ($item['parent-uri-id'] === $item['uri-id']) {
 711                         return GRAVITY_PARENT;
 712                 } elseif ($activity->match($item['verb'], Activity::POST)) {
 713                         return GRAVITY_COMMENT;
 714                 } elseif ($activity->match($item['verb'], Activity::FOLLOW)) {
 715                         return GRAVITY_ACTIVITY;
 716                 } elseif ($activity->match($item['verb'], Activity::ANNOUNCE)) {
 717                         return GRAVITY_ACTIVITY;
 718                 }
 719                 Logger::info('Unknown gravity for verb', ['verb' => $item['verb']]);
 720                 return GRAVITY_UNKNOWN;   // Should not happen
 721         }
 722
 723         public static function insert(array $item, bool $notify = false, bool $post_local = true)
 724         {
 725                 $orig_item = $item;
 726
 727                 $priority = PRIORITY_HIGH;
 728
 729                 // If it is a posting where users should get notifications, then define it as wall posting
 730                 if ($notify) {
 731                         $item['wall'] = 1;
 732                         $item['origin'] = 1;
 733                         $item['network'] = Protocol::DFRN;
 734                         $item['protocol'] = Conversation::PARCEL_DIRECT;
 735                         $item['direction'] = Conversation::PUSH;
 736
 737                         if (in_array($notify, PRIORITIES)) {
 738                                 $priority = $notify;
 739                         }
 740                 } else {
 741                         $item['network'] = trim(($item['network'] ?? '') ?: Protocol::PHANTOM);
 742                 }
 743
 744                 $uid = intval($item['uid']);
 745
 746                 $item['guid'] = self::guid($item, $notify);
 747                 $item['uri'] = substr(trim($item['uri'] ?? '') ?: self::newURI($item['uid'], $item['guid']), 0, 255);
 748
 749                 // Store URI data
 750                 $item['uri-id'] = ItemURI::insert(['uri' => $item['uri'], 'guid' => $item['guid']]);
 751
 752                 // Backward compatibility: parent-uri used to be the direct parent uri.
 753                 // If it is provided without a thr-parent, it probably is the old behavior.
 754                 $item['thr-parent'] = trim($item['thr-parent'] ?? $item['parent-uri'] ?? $item['uri']);
 755                 $item['parent-uri'] = $item['thr-parent'];
 756
 757                 $item['thr-parent-id'] = $item['parent-uri-id'] = ItemURI::getIdByURI($item['thr-parent']);
 758
 759                 // Store conversation data
 760                 $item = Conversation::insert($item);
 761
 762                 /*
 763                  * Do we already have this item?
 764                  * We have to check several networks since Friendica posts could be repeated
 765                  * via OStatus (maybe Diasporsa as well)
 766                  */
 767                 $duplicate = self::getDuplicateID($item);
 768                 if ($duplicate) {
 769                         return $duplicate;
 770                 }
 771
 772                 // Additional duplicate checks
 773                 /// @todo Check why the first duplication check returns the item number and the second a 0
 774                 if (self::isDuplicate($item)) {
 775                         return 0;
 776                 }
 777
 778                 if (!isset($item['post-type'])) {
 779                         $item['post-type'] = empty($item['title']) ? self::PT_NOTE : self::PT_ARTICLE;
 780                 }
 781
 782                 $item['wall']          = intval($item['wall'] ?? 0);
 783                 $item['extid']         = trim($item['extid'] ?? '');
 784                 $item['author-name']   = trim($item['author-name'] ?? '');
 785                 $item['author-link']   = trim($item['author-link'] ?? '');
 786                 $item['author-avatar'] = trim($item['author-avatar'] ?? '');
 787                 $item['owner-name']    = trim($item['owner-name'] ?? '');
 788                 $item['owner-link']    = trim($item['owner-link'] ?? '');
 789                 $item['owner-avatar']  = trim($item['owner-avatar'] ?? '');
 790                 $item['received']      = (isset($item['received'])  ? DateTimeFormat::utc($item['received'])  : DateTimeFormat::utcNow());
 791                 $item['created']       = (isset($item['created'])   ? DateTimeFormat::utc($item['created'])   : $item['received']);
 792                 $item['edited']        = (isset($item['edited'])    ? DateTimeFormat::utc($item['edited'])    : $item['created']);
 793                 $item['changed']       = (isset($item['changed'])   ? DateTimeFormat::utc($item['changed'])   : $item['created']);
 794                 $item['commented']     = (isset($item['commented']) ? DateTimeFormat::utc($item['commented']) : $item['created']);
 795                 $item['title']         = substr(trim($item['title'] ?? ''), 0, 255);
 796                 $item['location']      = trim($item['location'] ?? '');
 797                 $item['coord']         = trim($item['coord'] ?? '');
 798                 $item['visible']       = (isset($item['visible']) ? intval($item['visible']) : 1);
 799                 $item['deleted']       = 0;
 800                 $item['verb']          = trim($item['verb'] ?? '');
 801                 $item['object-type']   = trim($item['object-type'] ?? '');
 802                 $item['object']        = trim($item['object'] ?? '');
 803                 $item['target-type']   = trim($item['target-type'] ?? '');
 804                 $item['target']        = trim($item['target'] ?? '');
 805                 $item['plink']         = substr(trim($item['plink'] ?? ''), 0, 255);
 806                 $item['allow_cid']     = trim($item['allow_cid'] ?? '');
 807                 $item['allow_gid']     = trim($item['allow_gid'] ?? '');
 808                 $item['deny_cid']      = trim($item['deny_cid'] ?? '');
 809                 $item['deny_gid']      = trim($item['deny_gid'] ?? '');
 810                 $item['private']       = intval($item['private'] ?? self::PUBLIC);
 811                 $item['body']          = trim($item['body'] ?? '');
 812                 $item['raw-body']      = trim($item['raw-body'] ?? $item['body']);
 813                 $item['app']           = trim($item['app'] ?? '');
 814                 $item['origin']        = intval($item['origin'] ?? 0);
 815                 $item['postopts']      = trim($item['postopts'] ?? '');
 816                 $item['resource-id']   = trim($item['resource-id'] ?? '');
 817                 $item['event-id']      = intval($item['event-id'] ?? 0);
 818                 $item['inform']        = trim($item['inform'] ?? '');
 819                 $item['file']          = trim($item['file'] ?? '');
 820
 821                 // Items cannot be stored before they happen ...
 822                 if ($item['created'] > DateTimeFormat::utcNow()) {
 823                         $item['created'] = DateTimeFormat::utcNow();
 824                 }
 825
 826                 // We haven't invented time travel by now.
 827                 if ($item['edited'] > DateTimeFormat::utcNow()) {
 828                         $item['edited'] = DateTimeFormat::utcNow();
 829                 }
 830
 831                 $item['plink'] = ($item['plink'] ?? '') ?: DI::baseUrl() . '/display/' . urlencode($item['guid']);
 832
 833                 $item['gravity'] = self::getGravity($item);
 834
 835                 $item['language'] = self::getLanguage($item);
 836
 837                 $default = ['url' => $item['author-link'], 'name' => $item['author-name'],
 838                         'photo' => $item['author-avatar'], 'network' => $item['network']];
 839                 $item['author-id'] = ($item['author-id'] ?? 0) ?: Contact::getIdForURL($item['author-link'], 0, null, $default);
 840
 841                 $default = ['url' => $item['owner-link'], 'name' => $item['owner-name'],
 842                         'photo' => $item['owner-avatar'], 'network' => $item['network']];
 843                 $item['owner-id'] = ($item['owner-id'] ?? 0) ?: Contact::getIdForURL($item['owner-link'], 0, null, $default);
 844
 845                 $actor = ($item['gravity'] == GRAVITY_PARENT) ? $item['owner-id'] : $item['author-id'];
 846                 if (!$item['origin'] && ($item['uid'] != 0) && Contact::isSharing($actor, $item['uid'])) {
 847                         $item['post-reason'] = self::PR_FOLLOWER;
 848                 }
 849
 850                 // Ensure that there is an avatar cache
 851                 Contact::checkAvatarCache($item['author-id']);
 852                 Contact::checkAvatarCache($item['owner-id']);
 853
 854                 // The contact-id should be set before "self::insert" was called - but there seems to be issues sometimes
 855                 $item["contact-id"] = self::contactId($item);
 856
 857                 if (!empty($item['direction']) && in_array($item['direction'], [Conversation::PUSH, Conversation::RELAY]) &&
 858                         self::isTooOld($item)) {
 859                         Logger::info('Item is too old', ['item' => $item]);
 860                         return 0;
 861                 }
 862
 863                 if (!self::isValid($item)) {
 864                         return 0;
 865                 }
 866
 867                 if ($item['gravity'] !== GRAVITY_PARENT) {
 868                         $toplevel_parent = self::getTopLevelParent($item);
 869                         if (empty($toplevel_parent)) {
 870                                 return 0;
 871                         }
 872
 873                         // If the thread originated from this node, we check the permission against the thread starter
 874                         $condition = ['uri-id' => $toplevel_parent['uri-id'], 'wall' => true];
 875                         $localTopLevelParent = Post::selectFirst(['uid'], $condition);
 876                         if (!empty($localTopLevelParent['uid']) && !self::isAllowedByUser($item, $localTopLevelParent['uid'])) {
 877                                 return 0;
 878                         }
 879
 880                         $parent_id             = $toplevel_parent['id'];
 881                         $item['parent-uri']    = $toplevel_parent['uri'];
 882                         $item['parent-uri-id'] = $toplevel_parent['uri-id'];
 883                         $item['deleted']       = $toplevel_parent['deleted'];
 884
 885                         // Reshares have to keep their permissions to allow forums to work
 886                         if (!$item['origin'] || ($item['verb'] != Activity::ANNOUNCE)) {
 887                                 $item['allow_cid']     = $toplevel_parent['allow_cid'];
 888                                 $item['allow_gid']     = $toplevel_parent['allow_gid'];
 889                                 $item['deny_cid']      = $toplevel_parent['deny_cid'];
 890                                 $item['deny_gid']      = $toplevel_parent['deny_gid'];
 891                         }
 892
 893                         $parent_origin         = $toplevel_parent['origin'];
 894
 895                         // Don't federate received participation messages
 896                         if ($item['verb'] != Activity::FOLLOW) {
 897                                 $item['wall'] = $toplevel_parent['wall'];
 898                         } else {
 899                                 $item['wall'] = false;
 900                                 // Participations are technical messages, so they are set to "seen" automatically
 901                                 $item['unseen'] = false;
 902                         }
 903
 904                         /*
 905                          * If the parent is private, force privacy for the entire conversation
 906                          * This differs from the above settings as it subtly allows comments from
 907                          * email correspondents to be private even if the overall thread is not.
 908                          */
 909                         if ($toplevel_parent['private']) {
 910                                 $item['private'] = $toplevel_parent['private'];
 911                         }
 912
 913                         // If its a post that originated here then tag the thread as "mention"
 914                         if ($item['origin'] && $item['uid']) {
 915                                 DBA::update('post-thread-user', ['mention' => true], ['uri-id' => $item['parent-uri-id'], 'uid' => $item['uid']]);
 916                                 Logger::info('tagged thread as mention', ['parent' => $parent_id, 'parent-uri-id' => $item['parent-uri-id'], 'uid' => $item['uid']]);
 917                         }
 918
 919                         // Update the contact relations
 920                         Contact\Relation::store($toplevel_parent['author-id'], $item['author-id'], $item['created']);
 921                 } else {
 922                         $parent_id = 0;
 923                         $parent_origin = $item['origin'];
 924                 }
 925
 926                 $item['parent-uri-id'] = ItemURI::getIdByURI($item['parent-uri']);
 927                 $item['thr-parent-id'] = ItemURI::getIdByURI($item['thr-parent']);
 928
 929                 // Is this item available in the global items (with uid=0)?
 930                 if ($item["uid"] == 0) {
 931                         $item["global"] = true;
 932
 933                         // Set the global flag on all items if this was a global item entry
 934                         Post::update(['global' => true], ['uri-id' => $item['uri-id']]);
 935                 } else {
 936                         $item['global'] = Post::exists(['uid' => 0, 'uri-id' => $item['uri-id']]);
 937                 }
 938
 939                 // ACL settings
 940                 if (!empty($item["allow_cid"] . $item["allow_gid"] . $item["deny_cid"] . $item["deny_gid"])) {
 941                         $item["private"] = self::PRIVATE;
 942                 }
 943
 944                 if ($notify && $post_local) {
 945                         $item['edit'] = false;
 946                         $item['parent'] = $parent_id;
 947
 948                         // Trigger automatic reactions for addons
 949                         if (!isset($item['api_source'])) {
 950                                 $item['api_source'] = true;
 951                         }
 952
 953                         // We have to tell the hooks who we are - this really should be improved
 954                         if (!local_user()) {
 955                                 $_SESSION['authenticated'] = true;
 956                                 $_SESSION['uid'] = $uid;
 957                                 $dummy_session = true;
 958                         } else {
 959                                 $dummy_session = false;
 960                         }
 961
 962                         Hook::callAll('post_local', $item);
 963
 964                         if ($dummy_session) {
 965                                 unset($_SESSION['authenticated']);
 966                                 unset($_SESSION['uid']);
 967                         }
 968                 } elseif (!$notify) {
 969                         Hook::callAll('post_remote', $item);
 970                 }
 971
 972                 if (!empty($item['cancel'])) {
 973                         Logger::notice('post cancelled by addon.');
 974                         return 0;
 975                 }
 976
 977                 if (empty($item['vid']) && !empty($item['verb'])) {
 978                         $item['vid'] = Verb::getID($item['verb']);
 979                 }
 980
 981                 // Creates or assigns the permission set
 982                 $item['psid'] = DI::permissionSet()->selectOrCreate(
 983                         DI::permissionSetFactory()->createFromString(
 984                                 $item['uid'],
 985                                 $item['allow_cid'],
 986                                 $item['allow_gid'],
 987                                 $item['deny_cid'],
 988                                 $item['deny_gid']
 989                 ))->id;
 990
 991                 if (!empty($item['extid'])) {
 992                         $item['external-id'] = ItemURI::getIdByURI($item['extid']);
 993                 }
 994
 995                 if ($item['verb'] == Activity::ANNOUNCE) {
 996                         self::setOwnerforResharedItem($item);
 997                 }
 998
 999                 if (isset($item['attachments'])) {
1000                         foreach ($item['attachments'] as $attachment) {
1001                                 $attachment['uri-id'] = $item['uri-id'];
1002                                 Post\Media::insert($attachment);
1003                         }
1004                         unset($item['attachments']);
1005                 }
1006
1007                 Post\Media::insertFromAttachmentData($item['uri-id'], $item['body']);
1008
1009                 // Remove all media attachments from the body and store them in the post-media table
1010                 $item['raw-body'] = Post\Media::insertFromBody($item['uri-id'], $item['raw-body']);
1011                 $item['raw-body'] = self::setHashtags($item['raw-body']);
1012
1013                 if (!DBA::exists('contact', ['id' => $item['author-id'], 'network' => Protocol::DFRN])) {
1014                         Post\Media::insertFromRelevantUrl($item['uri-id'], $item['raw-body']);
1015                 }
1016
1017                 // Check for hashtags in the body and repair or add hashtag links
1018                 $item['body'] = self::setHashtags($item['body']);
1019
1020                 if (stristr($item['verb'], Activity::POKE)) {
1021                         $notify_type = Delivery::POKE;
1022                 } else {
1023                         $notify_type = Delivery::POST;
1024                 }
1025
1026                 // Filling item related side tables
1027                 if (!empty($item['attach'])) {
1028                         Post\Media::insertFromAttachment($item['uri-id'], $item['attach']);
1029                 }
1030
1031                 if (empty($item['event-id'])) {
1032                         unset($item['event-id']);
1033
1034                         $ev = Event::fromBBCode($item['body']);
1035                         if ((!empty($ev['desc']) || !empty($ev['summary'])) && !empty($ev['start'])) {
1036                                 Logger::info('Event found.');
1037                                 $ev['cid']       = $item['contact-id'];
1038                                 $ev['uid']       = $item['uid'];
1039                                 $ev['uri']       = $item['uri'];
1040                                 $ev['edited']    = $item['edited'];
1041                                 $ev['private']   = $item['private'];
1042                                 $ev['guid']      = $item['guid'];
1043                                 $ev['plink']     = $item['plink'];
1044                                 $ev['network']   = $item['network'];
1045                                 $ev['protocol']  = $item['protocol'] ?? Conversation::PARCEL_UNKNOWN;
1046                                 $ev['direction'] = $item['direction'] ?? Conversation::UNKNOWN;
1047                                 $ev['source']    = $item['source'] ?? '';
1048
1049                                 $event = DBA::selectFirst('event', ['id'], ['uri' => $item['uri'], 'uid' => $item['uid']]);
1050                                 if (DBA::isResult($event)) {
1051                                         $ev['id'] = $event['id'];
1052                                 }
1053
1054                                 $event_id = Event::store($ev);
1055                                 $item = Event::getItemArrayForImportedId($event_id, $item);
1056
1057                                 Logger::info('Event was stored', ['id' => $event_id]);
1058                         }
1059                 }
1060
1061                 if (empty($item['causer-id'])) {
1062                         unset($item['causer-id']);
1063                 }
1064
1065                 Post::insert($item['uri-id'], $item);
1066
1067                 if ($item['gravity'] == GRAVITY_PARENT) {
1068                         Post\Thread::insert($item['uri-id'], $item);
1069                 }
1070
1071                 if (!in_array($item['verb'], self::ACTIVITIES)) {
1072                         Post\Content::insert($item['uri-id'], $item);
1073                 }
1074
1075                 // Create Diaspora signature
1076                 if ($item['origin'] && empty($item['diaspora_signed_text']) && ($item['gravity'] != GRAVITY_PARENT)) {
1077                         $signed = Diaspora::createCommentSignature($item);
1078                         if (!empty($signed)) {
1079                                 $item['diaspora_signed_text'] = json_encode($signed);
1080                         }
1081                 }
1082
1083                 if (!empty($item['diaspora_signed_text'])) {
1084                         DBA::replace('diaspora-interaction', ['uri-id' => $item['uri-id'], 'interaction' => $item['diaspora_signed_text']]);
1085                 }
1086
1087                 // Attached file links
1088                 if (!empty($item['file'])) {
1089                         Post\Category::storeTextByURIId($item['uri-id'], $item['uid'], $item['file']);
1090                 }
1091
1092                 // Delivery relevant data
1093                 $delivery_data = Post\DeliveryData::extractFields($item);
1094
1095                 if (!empty($item['origin']) || !empty($item['wall']) || !empty($delivery_data['postopts']) || !empty($delivery_data['inform'])) {
1096                         Post\DeliveryData::insert($item['uri-id'], $delivery_data);
1097                 }
1098
1099                 // Store tags from the body if this hadn't been handled previously in the protocol classes
1100                 if (!Tag::existsForPost($item['uri-id'])) {
1101                         Tag::storeFromBody($item['uri-id'], $item['body']);
1102                 }
1103
1104                 $condition = ['uri-id' => $item['uri-id'], 'uid' => $item['uid']];
1105                 if (Post::exists($condition)) {
1106                         Logger::notice('Item is already inserted - aborting', $condition);
1107                         return 0;
1108                 }
1109
1110                 $post_user_id = Post\User::insert($item['uri-id'], $item['uid'], $item);
1111                 if (!$post_user_id) {
1112                         Logger::notice('Post-User is already inserted - aborting', ['uid' => $item['uid'], 'uri-id' => $item['uri-id']]);
1113                         return 0;
1114                 }
1115
1116                 if ($item['gravity'] == GRAVITY_PARENT) {
1117                         $item['post-user-id'] = $post_user_id;
1118                         Post\ThreadUser::insert($item['uri-id'], $item['uid'], $item);
1119                 }
1120
1121                 Logger::notice('created item', ['post-id' => $post_user_id, 'uid' => $item['uid'], 'network' => $item['network'], 'uri-id' => $item['uri-id'], 'guid' => $item['guid']]);
1122
1123                 $posted_item = Post::selectFirst(self::ITEM_FIELDLIST, ['post-user-id' => $post_user_id]);
1124                 if (!DBA::isResult($posted_item)) {
1125                         // On failure store the data into a spool file so that the "SpoolPost" worker can try again later.
1126                         Logger::warning('Could not store item. it will be spooled', ['id' => $post_user_id]);
1127                         self::spool($orig_item);
1128                         return 0;
1129                 }
1130
1131                 // update the commented timestamp on the parent
1132                 if (DI::config()->get('system', 'like_no_comment')) {
1133                         // Update when it is a comment
1134                         $update_commented = in_array($posted_item['gravity'], [GRAVITY_PARENT, GRAVITY_COMMENT]);
1135                 } else {
1136                         // Update when it isn't a follow or tag verb
1137                         $update_commented = !in_array($posted_item['verb'], [Activity::FOLLOW, Activity::TAG]);
1138                 }
1139
1140                 if ($update_commented) {
1141                         $fields = ['commented' => DateTimeFormat::utcNow(), 'changed' => DateTimeFormat::utcNow()];
1142                 } else {
1143                         $fields = ['changed' => DateTimeFormat::utcNow()];
1144                 }
1145
1146                 Post::update($fields, ['uri-id' => $posted_item['parent-uri-id'], 'uid' => $posted_item['uid']]);
1147
1148                 // In that function we check if this is a forum post. Additionally we delete the item under certain circumstances
1149                 if (self::tagDeliver($posted_item['uid'], $post_user_id)) {
1150                         // Get the user information for the logging
1151                         $user = User::getById($uid);
1152
1153                         Logger::notice('Item had been deleted', ['id' => $post_user_id, 'user' => $uid, 'account-type' => $user['account-type']]);
1154                         return 0;
1155                 }
1156
1157                 if ($notify) {
1158                         if (!\Friendica\Content\Feature::isEnabled($posted_item['uid'], 'explicit_mentions') && ($posted_item['gravity'] == GRAVITY_COMMENT)) {
1159                                 Tag::createImplicitMentions($posted_item['uri-id'], $posted_item['thr-parent-id']);
1160                         }
1161                         Hook::callAll('post_local_end', $posted_item);
1162                 } else {
1163                         Hook::callAll('post_remote_end', $posted_item);
1164                 }
1165
1166                 if ($posted_item['gravity'] === GRAVITY_PARENT) {
1167                         self::addShadow($post_user_id);
1168                 } else {
1169                         self::addShadowPost($post_user_id);
1170                 }
1171
1172                 self::updateContact($posted_item);
1173
1174                 Post\UserNotification::setNotification($posted_item['uri-id'], $posted_item['uid']);
1175
1176                 // Distribute items to users who subscribed to their tags
1177                 self::distributeByTags($posted_item);
1178
1179                 // Automatically reshare the item if the "remote_self" option is selected
1180                 self::autoReshare($posted_item);
1181
1182                 $transmit = $notify || ($posted_item['visible'] && ($parent_origin || $posted_item['origin']));
1183
1184                 if ($transmit) {
1185                         // Don't relay participation messages
1186                         if (($posted_item['verb'] == Activity::FOLLOW) &&
1187                                 (!$posted_item['origin'] || ($posted_item['author-id'] != Contact::getPublicIdByUserId($uid)))) {
1188                                 Logger::info('Participation messages will not be relayed', ['item' => $posted_item['id'], 'uri' => $posted_item['uri'], 'verb' => $posted_item['verb']]);
1189                                 $transmit = false;
1190                         }
1191                 }
1192
1193                 if ($transmit) {
1194                         Worker::add(['priority' => $priority, 'dont_fork' => true], 'Notifier', $notify_type, (int)$posted_item['uri-id'], (int)$posted_item['uid']);
1195                 }
1196
1197                 return $post_user_id;
1198         }
1199
1200         /**
1201          * Change the owner of a parent item if it had been shared by a forum
1202          *
1203          * (public) forum posts in the new format consist of the regular post by the author
1204          * followed by an announce message sent from the forum account.
1205          * Changing the owner helps in grouping forum posts.
1206          *
1207          * @param array $item
1208          * @return void
1209          */
1210         private static function setOwnerforResharedItem(array $item)
1211         {
1212                 $parent = Post::selectFirst(['id', 'causer-id', 'owner-id', 'author-id', 'author-link', 'origin', 'post-reason'],
1213                         ['uri-id' => $item['thr-parent-id'], 'uid' => $item['uid']]);
1214                 if (!DBA::isResult($parent)) {
1215                         Logger::error('Parent not found', ['uri-id' => $item['thr-parent-id'], 'uid' => $item['uid']]);
1216                         return;
1217                 }
1218
1219                 $author = Contact::selectFirst(['url', 'contact-type', 'network'], ['id' => $item['author-id']]);
1220                 if (!DBA::isResult($author)) {
1221                         Logger::error('Author not found', ['id' => $item['author-id']]);
1222                         return;
1223                 }
1224
1225                 $cid = Contact::getIdForURL($author['url'], $item['uid']);
1226                 if (empty($cid) || !Contact::isSharing($cid, $item['uid'])) {
1227                         Logger::info('The resharer is not a following contact: quit', ['resharer' => $author['url'], 'uid' => $item['uid'], 'cid' => $cid]);
1228                         return;
1229                 }
1230
1231                 if ($author['contact-type'] != Contact::TYPE_COMMUNITY) {
1232                         if ($parent['post-reason'] == self::PR_ANNOUNCEMENT) {
1233                                 Logger::info('The parent is already marked as announced: quit', ['causer' => $parent['causer-id'], 'owner' => $parent['owner-id'], 'author' => $parent['author-id'], 'uid' => $item['uid']]);
1234                                 return;
1235                         }
1236
1237                         if (Contact::isSharing($parent['owner-id'], $item['uid'])) {
1238                                 Logger::info('The resharer is no forum: quit', ['resharer' => $item['author-id'], 'owner' => $parent['owner-id'], 'author' => $parent['author-id'], 'uid' => $item['uid']]);
1239                                 return;
1240                         }
1241                 }
1242
1243                 self::update(['post-reason' => self::PR_ANNOUNCEMENT, 'causer-id' => $item['author-id']], ['id' => $parent['id']]);
1244                 Logger::info('Set announcement post-reason', ['uri-id' => $item['uri-id'], 'thr-parent-id' => $item['thr-parent-id'], 'uid' => $item['uid']]);
1245         }
1246
1247         /**
1248          * Distribute the given item to users who subscribed to their tags
1249          *
1250          * @param array $item     Processed item
1251          */
1252         private static function distributeByTags(array $item)
1253         {
1254                 if (($item['uid'] != 0) || ($item['gravity'] != GRAVITY_PARENT) || !in_array($item['network'], Protocol::FEDERATED)) {
1255                         return;
1256                 }
1257
1258                 $uids = Tag::getUIDListByURIId($item['uri-id']);
1259                 foreach ($uids as $uid) {
1260                         if (Contact::isSharing($item['author-id'], $uid)) {
1261                                 $fields = [];
1262                         } else {
1263                                 $fields = ['post-reason' => self::PR_TAG];
1264                         }
1265
1266                         $stored = self::storeForUserByUriId($item['uri-id'], $uid, $fields);
1267                         Logger::info('Stored item for users', ['uri-id' => $item['uri-id'], 'uid' => $uid, 'fields' => $fields, 'stored' => $stored]);
1268                 }
1269         }
1270
1271         /**
1272          * Distributes public items to the receivers
1273          *
1274          * @param integer $itemid      Item ID that should be added
1275          * @param string  $signed_text Original text (for Diaspora signatures), JSON encoded.
1276          * @throws \Exception
1277          */
1278         public static function distribute($itemid, $signed_text = '')
1279         {
1280                 $condition = ["`id` IN (SELECT `parent` FROM `post-user-view` WHERE `id` = ?)", $itemid];
1281                 $parent = Post::selectFirst(['owner-id'], $condition);
1282                 if (!DBA::isResult($parent)) {
1283                         Logger::warning('Item not found', ['condition' => $condition]);
1284                         return;
1285                 }
1286
1287                 // Only distribute public items from native networks
1288                 $condition = ['id' => $itemid, 'uid' => 0,
1289                         'network' => array_merge(Protocol::FEDERATED ,['']),
1290                         'visible' => true, 'deleted' => false, 'private' => [self::PUBLIC, self::UNLISTED]];
1291                 $item = Post::selectFirst(self::ITEM_FIELDLIST, $condition);
1292                 if (!DBA::isResult($item)) {
1293                         Logger::warning('Item not found', ['condition' => $condition]);
1294                         return;
1295                 }
1296
1297                 $origin = $item['origin'];
1298
1299                 $users = [];
1300
1301                 /// @todo add a field "pcid" in the contact table that referrs to the public contact id.
1302                 $owner = DBA::selectFirst('contact', ['url', 'nurl', 'alias'], ['id' => $parent['owner-id']]);
1303                 if (!DBA::isResult($owner)) {
1304                         return;
1305                 }
1306
1307                 $condition = ['nurl' => $owner['nurl'], 'rel' => [Contact::SHARING, Contact::FRIEND]];
1308                 $contacts = DBA::select('contact', ['uid'], $condition);
1309                 while ($contact = DBA::fetch($contacts)) {
1310                         if ($contact['uid'] == 0) {
1311                                 continue;
1312                         }
1313
1314                         $users[$contact['uid']] = $contact['uid'];
1315                 }
1316                 DBA::close($contacts);
1317
1318                 $condition = ['alias' => $owner['url'], 'rel' => [Contact::SHARING, Contact::FRIEND]];
1319                 $contacts = DBA::select('contact', ['uid'], $condition);
1320                 while ($contact = DBA::fetch($contacts)) {
1321                         if ($contact['uid'] == 0) {
1322                                 continue;
1323                         }
1324
1325                         $users[$contact['uid']] = $contact['uid'];
1326                 }
1327                 DBA::close($contacts);
1328
1329                 if (!empty($owner['alias'])) {
1330                         $condition = ['nurl' => Strings::normaliseLink($owner['alias']), 'rel' => [Contact::SHARING, Contact::FRIEND]];
1331                         $contacts = DBA::select('contact', ['uid'], $condition);
1332                         while ($contact = DBA::fetch($contacts)) {
1333                                 if ($contact['uid'] == 0) {
1334                                         continue;
1335                                 }
1336
1337                                 $users[$contact['uid']] = $contact['uid'];
1338                         }
1339                         DBA::close($contacts);
1340                 }
1341
1342                 $origin_uid = 0;
1343
1344                 if ($item['uri-id'] != $item['parent-uri-id']) {
1345                         $parents = Post::select(['uid', 'origin'], ["`uri-id` = ? AND `uid` != 0", $item['parent-uri-id']]);
1346                         while ($parent = Post::fetch($parents)) {
1347                                 $users[$parent['uid']] = $parent['uid'];
1348                                 if ($parent['origin'] && !$origin) {
1349                                         $origin_uid = $parent['uid'];
1350                                 }
1351                         }
1352                         DBA::close($parents);
1353                 }
1354
1355                 foreach ($users as $uid) {
1356                         if ($origin_uid == $uid) {
1357                                 $item['diaspora_signed_text'] = $signed_text;
1358                         }
1359                         self::storeForUser($item, $uid);
1360                 }
1361         }
1362
1363         /**
1364          * Store a public item defined by their URI-ID for the given users
1365          *
1366          * @param integer $uri_id     URI-ID of the given item
1367          * @param integer $uid        The user that will receive the item entry
1368          * @param array   $fields     Additional fields to be stored
1369          * @param integer $source_uid User id of the source post
1370          * @return integer stored item id
1371          */
1372         public static function storeForUserByUriId(int $uri_id, int $uid, array $fields = [], int $source_uid = 0)
1373         {
1374                 if ($uid == $source_uid) {
1375                         Logger::warning('target UID must not be be equal to the source UID', ['uri-id' => $uri_id, 'uid' => $uid]);
1376                         return 0;
1377                 }
1378
1379                 $item = Post::selectFirst(self::ITEM_FIELDLIST, ['uri-id' => $uri_id, 'uid' => $source_uid]);
1380                 if (!DBA::isResult($item)) {
1381                         Logger::warning('Item could not be fetched', ['uri-id' => $uri_id, 'uid' => $source_uid]);
1382                         return 0;
1383                 }
1384
1385                 if (($source_uid == 0) && (($item['private'] == self::PRIVATE) || !in_array($item['network'], Protocol::FEDERATED))) {
1386                         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']]);
1387                         return 0;
1388                 }
1389
1390                 $item['post-reason'] = self::PR_STORED;
1391
1392                 $item = array_merge($item, $fields);
1393
1394                 $is_reshare = ($item['gravity'] == GRAVITY_ACTIVITY) && ($item['verb'] == Activity::ANNOUNCE);
1395
1396                 if ((($item['gravity'] == GRAVITY_PARENT) || $is_reshare) &&
1397                         DI::pConfig()->get($uid, 'system', 'accept_only_sharer') &&
1398                         !Contact::isSharingByURL($item['author-link'], $uid) &&
1399                         !Contact::isSharingByURL($item['owner-link'], $uid)) {
1400                         Logger::info('Contact is not a follower, thread will not be stored', ['author' => $item['author-link'], 'uid' => $uid]);
1401                         return 0;
1402                 }
1403
1404                 if ((($item['gravity'] == GRAVITY_COMMENT) || $is_reshare) && !Post::exists(['uri-id' => $item['thr-parent-id'], 'uid' => $uid])) {
1405                         // Fetch the origin user for the post
1406                         $origin_uid = self::GetOriginUidForUriId($item['thr-parent-id'], $uid);
1407                         if (is_null($origin_uid)) {
1408                                 Logger::info('Origin item was not found', ['uid' => $uid, 'uri-id' => $item['thr-parent-id']]);
1409                                 return 0;
1410                         }
1411
1412                         $causer = $item['causer-id'] ?: $item['author-id'];
1413                         $result = self::storeForUserByUriId($item['thr-parent-id'], $uid, ['causer-id' => $causer, 'post-reason' => self::PR_FETCHED], $origin_uid);
1414                         Logger::info('Fetched thread parent', ['uri-id' => $item['thr-parent-id'], 'uid' => $uid, 'causer' => $causer, 'result' => $result]);
1415                 }
1416
1417                 $stored = self::storeForUser($item, $uid);
1418                 Logger::info('Item stored for user', ['uri-id' => $item['uri-id'], 'uid' => $uid, 'source-uid' => $source_uid, 'stored' => $stored]);
1419                 return $stored;
1420         }
1421
1422         /**
1423          * Returns the origin uid of a post if the given user is allowed to see it.
1424          *
1425          * @param int $uriid
1426          * @param int $uid
1427          * @return int
1428          */
1429         private static function GetOriginUidForUriId(int $uriid, int $uid)
1430         {
1431                 if (Post::exists(['uri-id' => $uriid, 'uid' => $uid])) {
1432                         return $uid;
1433                 }
1434
1435                 $post = Post::selectFirst(['uid', 'allow_cid', 'allow_gid', 'deny_cid', 'deny_gid', 'private'], ['uri-id' => $uriid, 'origin' => true]);
1436                 if (empty($post)) {
1437                         if (Post::exists(['uri-id' => $uriid, 'uid' => 0])) {
1438                                 return 0;
1439                         } else {
1440                                 return null;
1441                         }
1442                 }
1443
1444                 if (in_array($post['private'], [Item::PUBLIC, Item::UNLISTED])) {
1445                         return $post['uid'];
1446                 }
1447
1448                 $pcid = Contact::getPublicIdByUserId($uid);
1449                 if (empty($pcid)) {
1450                         return null;
1451                 }
1452
1453                 foreach (Item::enumeratePermissions($post, true) as $receiver) {
1454                         if ($receiver == $pcid) {
1455                                 return $post['uid'];
1456                         }
1457                 }
1458
1459                 return null;
1460         }
1461
1462         /**
1463          * Store a public item array for the given users
1464          *
1465          * @param array   $item   The item entry that will be stored
1466          * @param integer $uid    The user that will receive the item entry
1467          * @return integer stored item id
1468          * @throws \Exception
1469          */
1470         private static function storeForUser(array $item, int $uid)
1471         {
1472                 if (Post::exists(['uri-id' => $item['uri-id'], 'uid' => $uid])) {
1473                         if (!empty($item['event-id'])) {
1474                                 $post = Post::selectFirst(['event-id'], ['uri-id' => $item['uri-id'], 'uid' => $uid]);
1475                                 if (!empty($post['event-id'])) {
1476                                         $event = DBA::selectFirst('event', ['edited', 'start', 'finish', 'summary', 'desc', 'location', 'nofinish', 'adjust'], ['id' => $item['event-id']]);
1477                                         if (!empty($event)) {
1478                                                 // We aren't using "Event::store" here, since we don't want to trigger any further action
1479                                                 $ret = DBA::update('event', $event, ['id' => $post['event-id']]);
1480                                                 Logger::info('Event updated', ['uid' => $uid, 'source-event' => $item['event-id'], 'target-event' => $post['event-id'], 'ret' => $ret]);
1481                                         }
1482                                 }
1483                         }
1484                         Logger::info('Item already exists', ['uri-id' => $item['uri-id'], 'uid' => $uid]);
1485                         return 0;
1486                 }
1487
1488                 unset($item['id']);
1489                 unset($item['mention']);
1490                 unset($item['starred']);
1491                 unset($item['unseen']);
1492                 unset($item['psid']);
1493                 unset($item['pinned']);
1494                 unset($item['ignored']);
1495                 unset($item['pubmail']);
1496
1497                 unset($item['event-id']);
1498                 unset($item['hidden']);
1499                 unset($item['notification-type']);
1500
1501                 $item['uid'] = $uid;
1502                 $item['origin'] = 0;
1503                 $item['wall'] = 0;
1504
1505                 if ($item['gravity'] == GRAVITY_PARENT) {
1506                         $contact = Contact::getByURLForUser($item['owner-link'], $uid, false, ['id']);
1507                 } else {
1508                         $contact = Contact::getByURLForUser($item['author-link'], $uid, false, ['id']);
1509                 }
1510
1511                 if (!empty($contact['id'])) {
1512                         $item['contact-id'] = $contact['id'];
1513                 } else {
1514                         // Shouldn't happen at all
1515                         Logger::warning('contact-id could not be fetched', ['uid' => $uid, 'item' => $item]);
1516                         $self = DBA::selectFirst('contact', ['id'], ['self' => true, 'uid' => $uid]);
1517                         if (!DBA::isResult($self)) {
1518                                 // Shouldn't happen even less
1519                                 Logger::warning('self contact could not be fetched', ['uid' => $uid, 'item' => $item]);
1520                                 return 0;
1521                         }
1522                         $item['contact-id'] = $self['id'];
1523                 }
1524
1525                 $notify = false;
1526                 if ($item['gravity'] == GRAVITY_PARENT) {
1527                         $contact = DBA::selectFirst('contact', [], ['id' => $item['contact-id'], 'self' => false]);
1528                         if (DBA::isResult($contact)) {
1529                                 $notify = self::isRemoteSelf($contact, $item);
1530                         }
1531                 }
1532
1533                 $distributed = self::insert($item, $notify);
1534
1535                 if (!$distributed) {
1536                         Logger::info("Distributed item wasn't stored", ['uri-id' => $item['uri-id'], 'user' => $uid]);
1537                 } else {
1538                         Logger::info('Distributed item was stored', ['uri-id' => $item['uri-id'], 'user' => $uid, 'stored' => $distributed]);
1539                 }
1540                 return $distributed;
1541         }
1542
1543         /**
1544          * Add a shadow entry for a given item id that is a thread starter
1545          *
1546          * We store every public item entry additionally with the user id "0".
1547          * This is used for the community page and for the search.
1548          * It is planned that in the future we will store public item entries only once.
1549          *
1550          * @param integer $itemid Item ID that should be added
1551          * @throws \Exception
1552          */
1553         private static function addShadow($itemid)
1554         {
1555                 $fields = ['uid', 'private', 'visible', 'deleted', 'network', 'uri-id'];
1556                 $condition = ['id' => $itemid, 'gravity' => GRAVITY_PARENT];
1557                 $item = Post::selectFirst($fields, $condition);
1558
1559                 if (!DBA::isResult($item)) {
1560                         return;
1561                 }
1562
1563                 // is it already a copy?
1564                 if (($itemid == 0) || ($item['uid'] == 0)) {
1565                         return;
1566                 }
1567
1568                 // Is it a visible public post?
1569                 if (!$item["visible"] || $item["deleted"]  || ($item["private"] == self::PRIVATE)) {
1570                         return;
1571                 }
1572
1573                 // is it an entry from a connector? Only add an entry for natively connected networks
1574                 if (!in_array($item["network"], array_merge(Protocol::FEDERATED ,['']))) {
1575                         return;
1576                 }
1577
1578                 if (Post::exists(['uri-id' => $item['uri-id'], 'uid' => 0])) {
1579                         return;
1580                 }
1581
1582                 $item = Post::selectFirst(self::ITEM_FIELDLIST, ['id' => $itemid]);
1583
1584                 if (DBA::isResult($item)) {
1585                         // Preparing public shadow (removing user specific data)
1586                         $item['uid'] = 0;
1587                         unset($item['id']);
1588                         unset($item['parent']);
1589                         unset($item['wall']);
1590                         unset($item['mention']);
1591                         unset($item['origin']);
1592                         unset($item['starred']);
1593                         unset($item['postopts']);
1594                         unset($item['inform']);
1595                         unset($item['post-reason']);
1596                         if ($item['uri-id'] == $item['parent-uri-id']) {
1597                                 $item['contact-id'] = $item['owner-id'];
1598                         } else {
1599                                 $item['contact-id'] = $item['author-id'];
1600                         }
1601
1602                         $public_shadow = self::insert($item);
1603
1604                         Logger::info('Stored public shadow', ['thread' => $itemid, 'id' => $public_shadow]);
1605                 }
1606         }
1607
1608         /**
1609          * Add a shadow entry for a given item id that is a comment
1610          *
1611          * This function does the same like the function above - but for comments
1612          *
1613          * @param integer $itemid Item ID that should be added
1614          * @throws \Exception
1615          */
1616         private static function addShadowPost($itemid)
1617         {
1618                 $item = Post::selectFirst(self::ITEM_FIELDLIST, ['id' => $itemid]);
1619                 if (!DBA::isResult($item)) {
1620                         return;
1621                 }
1622
1623                 // Is it a toplevel post?
1624                 if ($item['gravity'] == GRAVITY_PARENT) {
1625                         self::addShadow($itemid);
1626                         return;
1627                 }
1628
1629                 // Is this a shadow entry?
1630                 if ($item['uid'] == 0) {
1631                         return;
1632                 }
1633
1634                 // Is there a shadow parent?
1635                 if (!Post::exists(['uri-id' => $item['parent-uri-id'], 'uid' => 0])) {
1636                         return;
1637                 }
1638
1639                 // Is there already a shadow entry?
1640                 if (Post::exists(['uri-id' => $item['uri-id'], 'uid' => 0])) {
1641                         return;
1642                 }
1643
1644                 // Save "origin" and "parent" state
1645                 $origin = $item['origin'];
1646                 $parent = $item['parent'];
1647
1648                 // Preparing public shadow (removing user specific data)
1649                 $item['uid'] = 0;
1650                 unset($item['id']);
1651                 unset($item['parent']);
1652                 unset($item['wall']);
1653                 unset($item['mention']);
1654                 unset($item['origin']);
1655                 unset($item['starred']);
1656                 unset($item['postopts']);
1657                 unset($item['inform']);
1658                 unset($item['post-reason']);
1659                 $item['contact-id'] = Contact::getIdForURL($item['author-link']);
1660
1661                 $public_shadow = self::insert($item);
1662
1663                 Logger::info('Stored public shadow', ['uri-id' => $item['uri-id'], 'id' => $public_shadow]);
1664
1665                 // If this was a comment to a Diaspora post we don't get our comment back.
1666                 // This means that we have to distribute the comment by ourselves.
1667                 if ($origin && Post::exists(['id' => $parent, 'network' => Protocol::DIASPORA])) {
1668                         self::distribute($public_shadow);
1669                 }
1670         }
1671
1672         /**
1673          * Adds a language specification in a "language" element of given $arr.
1674          * Expects "body" element to exist in $arr.
1675          *
1676          * @param array $item
1677          * @return string detected language
1678          * @throws \Text_LanguageDetect_Exception
1679          */
1680         private static function getLanguage(array $item)
1681         {
1682                 if (!empty($item['language'])) {
1683                         return $item['language'];
1684                 }
1685
1686                 if (!in_array($item['gravity'], [GRAVITY_PARENT, GRAVITY_COMMENT]) || empty($item['body'])) {
1687                         return '';
1688                 }
1689
1690                 // Convert attachments to links
1691                 $naked_body = BBCode::removeAttachment($item['body']);
1692                 if (empty($naked_body)) {
1693                         return '';
1694                 }
1695
1696                 // Remove links and pictures
1697                 $naked_body = BBCode::removeLinks($naked_body);
1698
1699                 // Convert the title and the body to plain text
1700                 $naked_body = trim($item['title'] . "\n" . BBCode::toPlaintext($naked_body));
1701
1702                 // Remove possibly remaining links
1703                 $naked_body = preg_replace(Strings::autoLinkRegEx(), '', $naked_body);
1704
1705                 if (empty($naked_body)) {
1706                         return '';
1707                 }
1708
1709                 $availableLanguages = DI::l10n()->getAvailableLanguages();
1710                 // See https://github.com/friendica/friendica/issues/10511
1711                 // Persian is manually added to language detection until a persian translation is provided for the interface, at
1712                 // which point it will be automatically available through `getAvailableLanguages()` and this should be removed.
1713                 $availableLanguages['fa'] = 'fa';
1714
1715                 $ld = new Language($availableLanguages);
1716                 $languages = $ld->detect($naked_body)->limit(0, 3)->close();
1717                 if (is_array($languages)) {
1718                         return json_encode($languages);
1719                 }
1720
1721                 return '';
1722         }
1723
1724         public static function getLanguageMessage(array $item)
1725         {
1726                 $iso639 = new \Matriphe\ISO639\ISO639;
1727
1728                 $used_languages = '';
1729                 foreach (json_decode($item['language'], true) as $language => $reliability) {
1730                         $used_languages .= $iso639->languageByCode1($language) . ' (' . $language . "): " . number_format($reliability, 5) . '\n';
1731                 }
1732                 $used_languages = DI::l10n()->t('Detected languages in this post:\n%s', $used_languages);
1733                 return $used_languages;
1734         }
1735
1736         /**
1737          * Creates an unique guid out of a given uri
1738          *
1739          * @param string $uri uri of an item entry
1740          * @param string $host hostname for the GUID prefix
1741          * @return string unique guid
1742          */
1743         public static function guidFromUri($uri, $host)
1744         {
1745                 // Our regular guid routine is using this kind of prefix as well
1746                 // We have to avoid that different routines could accidentally create the same value
1747                 $parsed = parse_url($uri);
1748
1749                 // We use a hash of the hostname as prefix for the guid
1750                 $guid_prefix = hash("crc32", $host);
1751
1752                 // Remove the scheme to make sure that "https" and "http" doesn't make a difference
1753                 unset($parsed["scheme"]);
1754
1755                 // Glue it together to be able to make a hash from it
1756                 $host_id = implode("/", $parsed);
1757
1758                 // We could use any hash algorithm since it isn't a security issue
1759                 $host_hash = hash("ripemd128", $host_id);
1760
1761                 return $guid_prefix.$host_hash;
1762         }
1763
1764         /**
1765          * generate an unique URI
1766          *
1767          * @param integer $uid  User id
1768          * @param string  $guid An existing GUID (Otherwise it will be generated)
1769          *
1770          * @return string
1771          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1772          */
1773         public static function newURI($uid, $guid = "")
1774         {
1775                 if ($guid == "") {
1776                         $guid = System::createUUID();
1777                 }
1778
1779                 return DI::baseUrl()->get() . '/objects/' . $guid;
1780         }
1781
1782         /**
1783          * Set "success_update" and "last-item" to the date of the last time we heard from this contact
1784          *
1785          * This can be used to filter for inactive contacts.
1786          * Only do this for public postings to avoid privacy problems, since poco data is public.
1787          * Don't set this value if it isn't from the owner (could be an author that we don't know)
1788          *
1789          * @param array $arr Contains the just posted item record
1790          * @throws \Exception
1791          */
1792         private static function updateContact($arr)
1793         {
1794                 // Unarchive the author
1795                 $contact = DBA::selectFirst('contact', [], ['id' => $arr["author-id"]]);
1796                 if (DBA::isResult($contact)) {
1797                         Contact::unmarkForArchival($contact);
1798                 }
1799
1800                 // Unarchive the contact if it's not our own contact
1801                 $contact = DBA::selectFirst('contact', [], ['id' => $arr["contact-id"], 'self' => false]);
1802                 if (DBA::isResult($contact)) {
1803                         Contact::unmarkForArchival($contact);
1804                 }
1805
1806                 /// @todo On private posts we could obfuscate the date
1807                 $update = ($arr['private'] != self::PRIVATE) || in_array($arr['network'], Protocol::FEDERATED);
1808
1809                 // Is it a forum? Then we don't care about the rules from above
1810                 if (!$update && in_array($arr["network"], [Protocol::ACTIVITYPUB, Protocol::DFRN]) && ($arr["parent-uri-id"] === $arr["uri-id"])) {
1811                         if (DBA::exists('contact', ['id' => $arr['contact-id'], 'forum' => true])) {
1812                                 $update = true;
1813                         }
1814                 }
1815
1816                 if ($update) {
1817                         // The "self" contact id is used (for example in the connectors) when the contact is unknown
1818                         // So we have to ensure to only update the last item when it had been our own post,
1819                         // or it had been done by a "regular" contact.
1820                         if (!empty($arr['wall'])) {
1821                                 $condition = ['id' => $arr['contact-id']];
1822                         } else {
1823                                 $condition = ['id' => $arr['contact-id'], 'self' => false];
1824                         }
1825                         Contact::update(['failed' => false, 'success_update' => $arr['received'], 'last-item' => $arr['received']], $condition);
1826                 }
1827                 // Now do the same for the system wide contacts with uid=0
1828                 if ($arr['private'] != self::PRIVATE) {
1829                         Contact::update(['failed' => false, 'success_update' => $arr['received'], 'last-item' => $arr['received']],
1830                                 ['id' => $arr['owner-id']]);
1831
1832                         if ($arr['owner-id'] != $arr['author-id']) {
1833                                 Contact::update(['failed' => false, 'success_update' => $arr['received'], 'last-item' => $arr['received']],
1834                                         ['id' => $arr['author-id']]);
1835                         }
1836                 }
1837         }
1838
1839         public static function setHashtags($body)
1840         {
1841                 $body = BBCode::performWithEscapedTags($body, ['noparse', 'pre', 'code', 'img'], function ($body) {
1842                         $tags = BBCode::getTags($body);
1843
1844                         // No hashtags?
1845                         if (!count($tags)) {
1846                                 return $body;
1847                         }
1848
1849                         // This sorting is important when there are hashtags that are part of other hashtags
1850                         // Otherwise there could be problems with hashtags like #test and #test2
1851                         // Because of this we are sorting from the longest to the shortest tag.
1852                         usort($tags, function ($a, $b) {
1853                                 return strlen($b) <=> strlen($a);
1854                         });
1855
1856                         $URLSearchString = "^\[\]";
1857
1858                         // All hashtags should point to the home server if "local_tags" is activated
1859                         if (DI::config()->get('system', 'local_tags')) {
1860                                 $body = preg_replace("/#\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",
1861                                         "#[url=" . DI::baseUrl() . "/search?tag=$2]$2[/url]", $body);
1862                         }
1863
1864                         // mask hashtags inside of url, bookmarks and attachments to avoid urls in urls
1865                         $body = preg_replace_callback("/\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",
1866                                 function ($match) {
1867                                         return ("[url=" . str_replace("#", "&num;", $match[1]) . "]" . str_replace("#", "&num;", $match[2]) . "[/url]");
1868                                 }, $body);
1869
1870                         $body = preg_replace_callback("/\[bookmark\=([$URLSearchString]*)\](.*?)\[\/bookmark\]/ism",
1871                                 function ($match) {
1872                                         return ("[bookmark=" . str_replace("#", "&num;", $match[1]) . "]" . str_replace("#", "&num;", $match[2]) . "[/bookmark]");
1873                                 }, $body);
1874
1875                         $body = preg_replace_callback("/\[attachment (.*?)\](.*?)\[\/attachment\]/ism",
1876                                 function ($match) {
1877                                         return ("[attachment " . str_replace("#", "&num;", $match[1]) . "]" . $match[2] . "[/attachment]");
1878                                 }, $body);
1879
1880                         // Repair recursive urls
1881                         $body = preg_replace("/&num;\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",
1882                                 "&num;$2", $body);
1883
1884                         foreach ($tags as $tag) {
1885                                 if ((strpos($tag, '#') !== 0) || strpos($tag, '[url=') || strlen($tag) < 2 || $tag[1] == '#') {
1886                                         continue;
1887                                 }
1888
1889                                 $basetag = str_replace('_', ' ', substr($tag, 1));
1890                                 $newtag = '#[url=' . DI::baseUrl() . '/search?tag=' . $basetag . ']' . $basetag . '[/url]';
1891
1892                                 $body = str_replace($tag, $newtag, $body);
1893                         }
1894
1895                         // Convert back the masked hashtags
1896                         $body = str_replace("&num;", "#", $body);
1897
1898                         return $body;
1899                 });
1900
1901                 return $body;
1902         }
1903
1904         /**
1905          * look for mention tags and setup a second delivery chain for forum/community posts if appropriate
1906          *
1907          * @param int $uid
1908          * @param int $item_id
1909          * @return boolean true if item was deleted, else false
1910          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1911          * @throws \ImagickException
1912          */
1913         private static function tagDeliver($uid, $item_id)
1914         {
1915                 $mention = false;
1916
1917                 $owner = User::getOwnerDataById($uid);
1918                 if (!DBA::isResult($owner)) {
1919                         Logger::warning('User not found, quitting.', ['uid' => $uid]);
1920                         return false;
1921                 }
1922
1923                 if ($owner['contact-type'] != User::ACCOUNT_TYPE_COMMUNITY) {
1924                         Logger::debug('Owner is no community, quitting here.', ['uid' => $uid, 'id' => $item_id]);
1925                         return false;
1926                 }
1927
1928                 $item = Post::selectFirst(self::ITEM_FIELDLIST, ['id' => $item_id]);
1929                 if (!DBA::isResult($item)) {
1930                         Logger::warning('Post not found, quitting.', ['id' => $item_id]);
1931                         return false;
1932                 }
1933
1934                 if ($item['wall'] || $item['origin'] || ($item['gravity'] != GRAVITY_PARENT)) {
1935                         Logger::debug('Wall item, origin item or no parent post, quitting here.', ['wall' => $item['wall'], 'origin' => $item['origin'], 'gravity' => $item['gravity'], 'id' => $item_id, 'uri-id' => $item['uri-id'], 'guid' => $item['guid']]);
1936                         return false;
1937                 }
1938
1939                 $tags = Tag::getByURIId($item['uri-id'], [Tag::MENTION, Tag::EXCLUSIVE_MENTION]);
1940                 foreach ($tags as $tag) {
1941                         if (Strings::compareLink($owner['url'], $tag['url'])) {
1942                                 $mention = true;
1943                                 Logger::info('Mention found in tag.', ['url' => $tag['url'], 'uri' => $item['uri'], 'uid' => $uid, 'id' => $item_id, 'uri-id' => $item['uri-id'], 'guid' => $item['guid']]);
1944                         }
1945                 }
1946
1947                 // This check can most likely be removed since we always are having the tags
1948                 if (!$mention) {
1949                         $cnt = preg_match_all('/[\@\!]\[url\=(.*?)\](.*?)\[\/url\]/ism', $item['body'], $matches, PREG_SET_ORDER);
1950                         if ($cnt) {
1951                                 foreach ($matches as $mtch) {
1952                                         if (Strings::compareLink($owner['url'], $mtch[1])) {
1953                                                 $mention = true;
1954                                                 Logger::notice('Mention found in body.', ['mention' => $mtch[2], 'uri' => $item['uri'], 'uid' => $uid, 'id' => $item_id, 'uri-id' => $item['uri-id'], 'guid' => $item['guid']]);
1955                                         }
1956                                 }
1957                         }
1958                 }
1959
1960                 if (!$mention) {
1961                         Logger::info('Top-level post without mention is deleted.', ['uri' => $item['uri'], $uid, 'id' => $item_id, 'uri-id' => $item['uri-id'], 'guid' => $item['guid']]);
1962                         Post\User::delete(['uri-id' => $item['uri-id'], 'uid' => $item['uid']]);
1963                         return true;
1964                 }
1965
1966                 $arr = ['item' => $item, 'user' => $owner];
1967
1968                 Hook::callAll('tagged', $arr);
1969
1970                 Logger::info('Community post will be distributed', ['uri' => $item['uri'], 'uid' => $uid, 'id' => $item_id, 'uri-id' => $item['uri-id'], 'guid' => $item['guid']]);
1971
1972                 if ($owner['page-flags'] == User::PAGE_FLAGS_PRVGROUP) {
1973                         Group::getMembersForForum($owner['id']);
1974
1975                         $allow_cid = '<' . $owner['id'] . '>';
1976                         $allow_gid = '<' . Group::getIdForForum($owner['id']) . '>';
1977                         $deny_cid  = '';
1978                         $deny_gid  = '';
1979                         self::performActivity($item['id'], 'announce', $uid, $allow_cid, $allow_gid, $deny_cid, $deny_gid);
1980                 } else {
1981                         self::performActivity($item['id'], 'announce', $uid);
1982                 }
1983
1984                 Logger::info('Community post had been distributed', ['uri' => $item['uri'], 'uid' => $uid, 'id' => $item_id, 'uri-id' => $item['uri-id'], 'guid' => $item['guid']]);
1985                 return false;
1986         }
1987
1988         /**
1989          * Automatically reshare the item if the "remote_self" option is selected
1990          *
1991          * @param array $item
1992          * @return void
1993          */
1994         private static function autoReshare(array $item)
1995         {
1996                 if ($item['gravity'] != GRAVITY_PARENT) {
1997                         return;
1998                 }
1999
2000                 if (!DBA::exists('contact', ['id' => $item['contact-id'], 'remote_self' => Contact::MIRROR_NATIVE_RESHARE])) {
2001                         return;
2002                 }
2003
2004                 if (!in_array($item['network'], [Protocol::ACTIVITYPUB, Protocol::DFRN])) {
2005                         return;
2006                 }
2007
2008                 Logger::info('Automatically reshare item', ['uid' => $item['uid'], 'id' => $item['id'], 'guid' => $item['guid'], 'uri-id' => $item['uri-id']]);
2009
2010                 self::performActivity($item['id'], 'announce', $item['uid']);
2011         }
2012
2013         public static function isRemoteSelf($contact, &$datarray)
2014         {
2015                 if (!$contact['remote_self']) {
2016                         return false;
2017                 }
2018
2019                 // Prevent the forwarding of posts that are forwarded
2020                 if (!empty($datarray["extid"]) && ($datarray["extid"] == Protocol::DFRN)) {
2021                         Logger::info('Already forwarded');
2022                         return false;
2023                 }
2024
2025                 // Prevent to forward already forwarded posts
2026                 if ($datarray["app"] == DI::baseUrl()->getHostname()) {
2027                         Logger::info('Already forwarded (second test)');
2028                         return false;
2029                 }
2030
2031                 // Only forward posts
2032                 if ($datarray["verb"] != Activity::POST) {
2033                         Logger::info('No post');
2034                         return false;
2035                 }
2036
2037                 if (($contact['network'] != Protocol::FEED) && ($datarray['private'] == self::PRIVATE)) {
2038                         Logger::info('Not public');
2039                         return false;
2040                 }
2041
2042                 $datarray2 = $datarray;
2043                 Logger::info('remote-self start', ['contact' => $contact['url'], 'remote_self'=> $contact['remote_self'], 'item' => $datarray]);
2044                 if ($contact['remote_self'] == Contact::MIRROR_OWN_POST) {
2045                         $self = DBA::selectFirst('contact', ['id', 'name', 'url', 'thumb'],
2046                                         ['uid' => $contact['uid'], 'self' => true]);
2047                         if (DBA::isResult($self)) {
2048                                 $datarray['contact-id'] = $self["id"];
2049
2050                                 $datarray['owner-name'] = $self["name"];
2051                                 $datarray['owner-link'] = $self["url"];
2052                                 $datarray['owner-avatar'] = $self["thumb"];
2053
2054                                 $datarray['author-name']   = $datarray['owner-name'];
2055                                 $datarray['author-link']   = $datarray['owner-link'];
2056                                 $datarray['author-avatar'] = $datarray['owner-avatar'];
2057
2058                                 unset($datarray['edited']);
2059
2060                                 unset($datarray['network']);
2061                                 unset($datarray['owner-id']);
2062                                 unset($datarray['author-id']);
2063                         }
2064
2065                         if ($contact['network'] != Protocol::FEED) {
2066                                 $old_uri_id = $datarray["uri-id"] ?? 0;
2067                                 $datarray["guid"] = System::createUUID();
2068                                 unset($datarray["plink"]);
2069                                 $datarray["uri"] = self::newURI($contact['uid'], $datarray["guid"]);
2070                                 $datarray["uri-id"] = ItemURI::getIdByURI($datarray["uri"]);
2071                                 $datarray["extid"] = Protocol::DFRN;
2072                                 $urlpart = parse_url($datarray2['author-link']);
2073                                 $datarray["app"] = $urlpart["host"];
2074                                 if (!empty($old_uri_id)) {
2075                                         Post\Media::copy($old_uri_id, $datarray["uri-id"]);
2076                                 }
2077
2078                                 unset($datarray["parent-uri"]);
2079                                 unset($datarray["thr-parent"]);
2080                         } else {
2081                                 $datarray['private'] = self::PUBLIC;
2082                         }
2083                 }
2084
2085                 if ($contact['network'] != Protocol::FEED) {
2086                         // Store the original post
2087                         $result = self::insert($datarray2);
2088                         Logger::info('remote-self post original item', ['contact' => $contact['url'], 'result'=> $result, 'item' => $datarray2]);
2089                 } else {
2090                         $datarray["app"] = "Feed";
2091                         $result = true;
2092                 }
2093
2094                 return (bool)$result;
2095         }
2096
2097         /**
2098          *
2099          * @param string $s
2100          * @param int    $uid
2101          * @param array  $item
2102          * @param int    $cid
2103          * @return string
2104          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
2105          * @throws \ImagickException
2106          */
2107         public static function fixPrivatePhotos($s, $uid, $item = null, $cid = 0)
2108         {
2109                 if (DI::config()->get('system', 'disable_embedded')) {
2110                         return $s;
2111                 }
2112
2113                 Logger::info('check for photos');
2114                 $site = substr(DI::baseUrl(), strpos(DI::baseUrl(), '://'));
2115
2116                 $orig_body = $s;
2117                 $new_body = '';
2118
2119                 $img_start = strpos($orig_body, '[img');
2120                 $img_st_close = ($img_start !== false ? strpos(substr($orig_body, $img_start), ']') : false);
2121                 $img_len = ($img_start !== false ? strpos(substr($orig_body, $img_start + $img_st_close + 1), '[/img]') : false);
2122
2123                 while (($img_st_close !== false) && ($img_len !== false)) {
2124                         $img_st_close++; // make it point to AFTER the closing bracket
2125                         $image = substr($orig_body, $img_start + $img_st_close, $img_len);
2126
2127                         Logger::info('found photo', ['image' => $image]);
2128
2129                         if (stristr($image, $site . '/photo/')) {
2130                                 // Only embed locally hosted photos
2131                                 $replace = false;
2132                                 $i = basename($image);
2133                                 $i = str_replace(['.jpg', '.png', '.gif'], ['', '', ''], $i);
2134                                 $x = strpos($i, '-');
2135
2136                                 if ($x) {
2137                                         $res = substr($i, $x + 1);
2138                                         $i = substr($i, 0, $x);
2139                                         $photo = Photo::getPhotoForUser($uid, $i, $res);
2140                                         if (DBA::isResult($photo)) {
2141                                                 /*
2142                                                  * Check to see if we should replace this photo link with an embedded image
2143                                                  * 1. No need to do so if the photo is public
2144                                                  * 2. If there's a contact-id provided, see if they're in the access list
2145                                                  *    for the photo. If so, embed it.
2146                                                  * 3. Otherwise, if we have an item, see if the item permissions match the photo
2147                                                  *    permissions, regardless of order but first check to see if they're an exact
2148                                                  *    match to save some processing overhead.
2149                                                  */
2150                                                 if (self::hasPermissions($photo)) {
2151                                                         if ($cid) {
2152                                                                 $recips = self::enumeratePermissions($photo);
2153                                                                 if (in_array($cid, $recips)) {
2154                                                                         $replace = true;
2155                                                                 }
2156                                                         } elseif ($item) {
2157                                                                 if (self::samePermissions($uid, $item, $photo)) {
2158                                                                         $replace = true;
2159                                                                 }
2160                                                         }
2161                                                 }
2162                                                 if ($replace) {
2163                                                         $photo_img = Photo::getImageForPhoto($photo);
2164                                                         // If a custom width and height were specified, apply before embedding
2165                                                         if (preg_match("/\[img\=([0-9]*)x([0-9]*)\]/is", substr($orig_body, $img_start, $img_st_close), $match)) {
2166                                                                 Logger::info('scaling photo');
2167
2168                                                                 $width = intval($match[1]);
2169                                                                 $height = intval($match[2]);
2170
2171                                                                 $photo_img->scaleDown(max($width, $height));
2172                                                         }
2173
2174                                                         $data = $photo_img->asString();
2175                                                         $type = $photo_img->getType();
2176
2177                                                         Logger::info('replacing photo');
2178                                                         $image = 'data:' . $type . ';base64,' . base64_encode($data);
2179                                                         Logger::debug('replaced', ['image' => $image]);
2180                                                 }
2181                                         }
2182                                 }
2183                         }
2184
2185                         $new_body = $new_body . substr($orig_body, 0, $img_start + $img_st_close) . $image . '[/img]';
2186                         $orig_body = substr($orig_body, $img_start + $img_st_close + $img_len + strlen('[/img]'));
2187                         if ($orig_body === false) {
2188                                 $orig_body = '';
2189                         }
2190
2191                         $img_start = strpos($orig_body, '[img');
2192                         $img_st_close = ($img_start !== false ? strpos(substr($orig_body, $img_start), ']') : false);
2193                         $img_len = ($img_start !== false ? strpos(substr($orig_body, $img_start + $img_st_close + 1), '[/img]') : false);
2194                 }
2195
2196                 $new_body = $new_body . $orig_body;
2197
2198                 return $new_body;
2199         }
2200
2201         private static function hasPermissions($obj)
2202         {
2203                 return !empty($obj['allow_cid']) || !empty($obj['allow_gid']) ||
2204                         !empty($obj['deny_cid']) || !empty($obj['deny_gid']);
2205         }
2206
2207         private static function samePermissions($uid, $obj1, $obj2)
2208         {
2209                 // first part is easy. Check that these are exactly the same.
2210                 if (($obj1['allow_cid'] == $obj2['allow_cid'])
2211                         && ($obj1['allow_gid'] == $obj2['allow_gid'])
2212                         && ($obj1['deny_cid'] == $obj2['deny_cid'])
2213                         && ($obj1['deny_gid'] == $obj2['deny_gid'])) {
2214                         return true;
2215                 }
2216
2217                 // This is harder. Parse all the permissions and compare the resulting set.
2218                 $recipients1 = self::enumeratePermissions($obj1);
2219                 $recipients2 = self::enumeratePermissions($obj2);
2220                 sort($recipients1);
2221                 sort($recipients2);
2222
2223                 /// @TODO Comparison of arrays, maybe use array_diff_assoc() here?
2224                 return ($recipients1 == $recipients2);
2225         }
2226
2227         /**
2228          * Returns an array of contact-ids that are allowed to see this object
2229          *
2230          * @param array $obj        Item array with at least uid, allow_cid, allow_gid, deny_cid and deny_gid
2231          * @param bool  $check_dead Prunes unavailable contacts from the result
2232          * @return array
2233          * @throws \Exception
2234          */
2235         public static function enumeratePermissions(array $obj, bool $check_dead = false)
2236         {
2237                 $aclFormater = DI::aclFormatter();
2238
2239                 $allow_people = $aclFormater->expand($obj['allow_cid']);
2240                 $allow_groups = Group::expand($obj['uid'], $aclFormater->expand($obj['allow_gid']), $check_dead);
2241                 $deny_people  = $aclFormater->expand($obj['deny_cid']);
2242                 $deny_groups  = Group::expand($obj['uid'], $aclFormater->expand($obj['deny_gid']), $check_dead);
2243                 $recipients   = array_unique(array_merge($allow_people, $allow_groups));
2244                 $deny         = array_unique(array_merge($deny_people, $deny_groups));
2245                 $recipients   = array_diff($recipients, $deny);
2246                 return $recipients;
2247         }
2248
2249         public static function expire(int $uid, int $days, string $network = "", bool $force = false)
2250         {
2251                 if (!$uid || ($days < 1)) {
2252                         return;
2253                 }
2254
2255                 $condition = ["`uid` = ? AND NOT `deleted` AND `gravity` = ?",
2256                         $uid, GRAVITY_PARENT];
2257
2258                 /*
2259                  * $expire_network_only = save your own wall posts
2260                  * and just expire conversations started by others
2261                  */
2262                 $expire_network_only = DI::pConfig()->get($uid, 'expire', 'network_only', false);
2263
2264                 if ($expire_network_only) {
2265                         $condition[0] .= " AND NOT `wall`";
2266                 }
2267
2268                 if ($network != "") {
2269                         $condition[0] .= " AND `network` = ?";
2270                         $condition[] = $network;
2271                 }
2272
2273                 $condition[0] .= " AND `received` < ?";
2274                 $condition[] = DateTimeFormat::utc('now - ' . $days . ' day');
2275
2276                 $items = Post::select(['resource-id', 'starred', 'id', 'post-type', 'uid', 'uri-id'], $condition);
2277
2278                 if (!DBA::isResult($items)) {
2279                         return;
2280                 }
2281
2282                 $expire_items = DI::pConfig()->get($uid, 'expire', 'items', true);
2283
2284                 // Forcing expiring of items - but not notes and marked items
2285                 if ($force) {
2286                         $expire_items = true;
2287                 }
2288
2289                 $expire_notes = DI::pConfig()->get($uid, 'expire', 'notes', true);
2290                 $expire_starred = DI::pConfig()->get($uid, 'expire', 'starred', true);
2291                 $expire_photos = DI::pConfig()->get($uid, 'expire', 'photos', false);
2292
2293                 $expired = 0;
2294
2295                 $priority = DI::config()->get('system', 'expire-notify-priority');
2296
2297                 while ($item = Post::fetch($items)) {
2298                         // don't expire filed items
2299                         if (DBA::exists('post-category', ['uri-id' => $item['uri-id'], 'uid' => $item['uid'], 'type' => Post\Category::FILE])) {
2300                                 continue;
2301                         }
2302
2303                         // Only expire posts, not photos and photo comments
2304
2305                         if (!$expire_photos && !empty($item['resource-id'])) {
2306                                 continue;
2307                         } elseif (!$expire_starred && intval($item['starred'])) {
2308                                 continue;
2309                         } elseif (!$expire_notes && ($item['post-type'] == self::PT_PERSONAL_NOTE)) {
2310                                 continue;
2311                         } elseif (!$expire_items && ($item['post-type'] != self::PT_PERSONAL_NOTE)) {
2312                                 continue;
2313                         }
2314
2315                         self::markForDeletionById($item['id'], $priority);
2316
2317                         ++$expired;
2318                 }
2319                 DBA::close($items);
2320                 Logger::notice('User ' . $uid . ": expired $expired items; expire items: $expire_items, expire notes: $expire_notes, expire starred: $expire_starred, expire photos: $expire_photos");
2321         }
2322
2323         public static function firstPostDate($uid, $wall = false)
2324         {
2325                 $user = User::getById($uid, ['register_date']);
2326                 if (empty($user)) {
2327                         return false;
2328                 }
2329
2330                 $condition = ["`uid` = ? AND `wall` = ? AND NOT `deleted` AND `visible` AND `received` >= ?",
2331                         $uid, $wall, $user['register_date']];
2332                 $params = ['order' => ['received' => false]];
2333                 $thread = Post::selectFirstThread(['received'], $condition, $params);
2334                 if (DBA::isResult($thread)) {
2335                         $postdate = substr(DateTimeFormat::local($thread['received']), 0, 10);
2336                         return $postdate;
2337                 }
2338                 return false;
2339         }
2340
2341         /**
2342          * add/remove activity to an item
2343          *
2344          * Toggle activities as like,dislike,attend of an item
2345          *
2346          * @param int    $item_id
2347          * @param string $verb
2348          *            Activity verb. One of
2349          *            like, unlike, dislike, undislike, attendyes, unattendyes,
2350          *            attendno, unattendno, attendmaybe, unattendmaybe,
2351          *            announce, unannouce
2352          * @param int    $uid
2353          * @param string $allow_cid
2354          * @param string $allow_gid
2355          * @param string $deny_cid
2356          * @param string $deny_gid
2357          * @return bool
2358          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
2359          * @throws \ImagickException
2360          * @hook  'post_local_end'
2361          *            array $arr
2362          *            'post_id' => ID of posted item
2363          */
2364         public static function performActivity(int $item_id, string $verb, int $uid, string $allow_cid = null, string $allow_gid = null, string $deny_cid = null, string $deny_gid = null)
2365         {
2366                 if (empty($uid)) {
2367                         return false;
2368                 }
2369
2370                 Logger::notice('Start create activity', ['verb' => $verb, 'item' => $item_id, 'user' => $uid]);
2371
2372                 $item = Post::selectFirst(self::ITEM_FIELDLIST, ['id' => $item_id]);
2373                 if (!DBA::isResult($item)) {
2374                         Logger::notice('like: unknown item', ['id' => $item_id]);
2375                         return false;
2376                 }
2377
2378                 $uri_id = $item['uri-id'];
2379
2380                 if (!in_array($item['uid'], [0, $uid])) {
2381                         return false;
2382                 }
2383
2384                 if (!Post::exists(['uri-id' => $item['parent-uri-id'], 'uid' => $uid])) {
2385                         $stored = self::storeForUserByUriId($item['parent-uri-id'], $uid);
2386                         if (($item['parent-uri-id'] == $item['uri-id']) && !empty($stored)) {
2387                                 $item = Post::selectFirst(self::ITEM_FIELDLIST, ['id' => $stored]);
2388                                 if (!DBA::isResult($item)) {
2389                                         Logger::info('Could not fetch just created item - should not happen', ['stored' => $stored, 'uid' => $uid, 'uri-id' => $uri_id]);
2390                                         return false;
2391                                 }
2392                         }
2393                 }
2394
2395                 // Retrieves the local post owner
2396                 $owner = User::getOwnerDataById($uid);
2397                 if (empty($owner)) {
2398                         Logger::info('Empty owner for user', ['uid' => $uid]);
2399                         return false;
2400                 }
2401
2402                 // Retrieve the current logged in user's public contact
2403                 $author_id = Contact::getIdForURL($owner['url']);
2404                 if (empty($author_id)) {
2405                         Logger::info('Empty public contact');
2406                         return false;
2407                 }
2408
2409                 $activity = null;
2410                 switch ($verb) {
2411                         case 'like':
2412                         case 'unlike':
2413                                 $activity = Activity::LIKE;
2414                                 break;
2415                         case 'dislike':
2416                         case 'undislike':
2417                                 $activity = Activity::DISLIKE;
2418                                 break;
2419                         case 'attendyes':
2420                         case 'unattendyes':
2421                                 $activity = Activity::ATTEND;
2422                                 break;
2423                         case 'attendno':
2424                         case 'unattendno':
2425                                 $activity = Activity::ATTENDNO;
2426                                 break;
2427                         case 'attendmaybe':
2428                         case 'unattendmaybe':
2429                                 $activity = Activity::ATTENDMAYBE;
2430                                 break;
2431                         case 'follow':
2432                         case 'unfollow':
2433                                 $activity = Activity::FOLLOW;
2434                                 break;
2435                         case 'announce':
2436                         case 'unannounce':
2437                                 $activity = Activity::ANNOUNCE;
2438                                 break;
2439                         default:
2440                                 Logger::notice('unknown verb', ['verb' => $verb, 'item' => $item_id]);
2441                                 return false;
2442                 }
2443
2444                 $mode = Strings::startsWith($verb, 'un') ? 'delete' : 'create';
2445
2446                 // Enable activity toggling instead of on/off
2447                 $event_verb_flag = $activity === Activity::ATTEND || $activity === Activity::ATTENDNO || $activity === Activity::ATTENDMAYBE;
2448
2449                 // Look for an existing verb row
2450                 // Event participation activities are mutually exclusive, only one of them can exist at all times.
2451                 if ($event_verb_flag) {
2452                         $verbs = [Activity::ATTEND, Activity::ATTENDNO, Activity::ATTENDMAYBE];
2453
2454                         // Translate to the index based activity index
2455                         $vids = [];
2456                         foreach ($verbs as $verb) {
2457                                 $vids[] = Verb::getID($verb);
2458                         }
2459                 } else {
2460                         $vids = Verb::getID($activity);
2461                 }
2462
2463                 $condition = ['vid' => $vids, 'deleted' => false, 'gravity' => GRAVITY_ACTIVITY,
2464                         'author-id' => $author_id, 'uid' => $item['uid'], 'thr-parent-id' => $uri_id];
2465                 $like_item = Post::selectFirst(['id', 'guid', 'verb'], $condition);
2466
2467                 if (DBA::isResult($like_item)) {
2468                         /**
2469                          * Truth table for existing activities
2470                          *
2471                          * |          Inputs            ||      Outputs      |
2472                          * |----------------------------||-------------------|
2473                          * |  Mode  | Event | Same verb || Delete? | Return? |
2474                          * |--------|-------|-----------||---------|---------|
2475                          * | create |  Yes  |    Yes    ||   No    |   Yes   |
2476                          * | create |  Yes  |    No     ||   Yes   |   No    |
2477                          * | create |  No   |    Yes    ||   No    |   Yes   |
2478                          * | create |  No   |    No     ||        N/A†       |
2479                          * | delete |  Yes  |    Yes    ||   Yes   |   N/A‡  |
2480                          * | delete |  Yes  |    No     ||   No    |   N/A‡  |
2481                          * | delete |  No   |    Yes    ||   Yes   |   N/A‡  |
2482                          * | delete |  No   |    No     ||        N/A†       |
2483                          * |--------|-------|-----------||---------|---------|
2484                          * |   A    |   B   |     C     || A xor C | !B or C |
2485                          *
2486                          * † Can't happen: It's impossible to find an existing non-event activity without
2487                          *                 the same verb because we are only looking for this single verb.
2488                          *
2489                          * ‡ The "mode = delete" is returning early whether an existing activity was found or not.
2490                          */
2491                         if ($mode == 'create' xor $like_item['verb'] == $activity) {
2492                                 self::markForDeletionById($like_item['id']);
2493                         }
2494
2495                         if (!$event_verb_flag || $like_item['verb'] == $activity) {
2496                                 return true;
2497                         }
2498                 }
2499
2500                 // No need to go further if we aren't creating anything
2501                 if ($mode == 'delete') {
2502                         return true;
2503                 }
2504
2505                 $allow_cid = $allow_cid ?? $item['allow_cid'];
2506                 $allow_gid = $allow_gid ?? $item['allow_gid'];
2507                 $deny_cid  = $deny_cid ?? $item['deny_cid'];
2508                 $deny_gid  = $deny_gid ?? $item['deny_gid'];
2509
2510                 $objtype = $item['resource-id'] ? Activity\ObjectType::IMAGE : Activity\ObjectType::NOTE;
2511
2512                 $new_item = [
2513                         'guid'          => System::createUUID(),
2514                         'uri'           => self::newURI($item['uid']),
2515                         'uid'           => $item['uid'],
2516                         'contact-id'    => $owner['id'],
2517                         'wall'          => $item['wall'],
2518                         'origin'        => 1,
2519                         'network'       => Protocol::DFRN,
2520                         'protocol'      => Conversation::PARCEL_DIRECT,
2521                         'direction'     => Conversation::PUSH,
2522                         'gravity'       => GRAVITY_ACTIVITY,
2523                         'parent'        => $item['id'],
2524                         'thr-parent'    => $item['uri'],
2525                         'owner-id'      => $author_id,
2526                         'author-id'     => $author_id,
2527                         'body'          => $activity,
2528                         'verb'          => $activity,
2529                         'object-type'   => $objtype,
2530                         'allow_cid'     => $allow_cid,
2531                         'allow_gid'     => $allow_gid,
2532                         'deny_cid'      => $deny_cid,
2533                         'deny_gid'      => $deny_gid,
2534                         'visible'       => 1,
2535                         'unseen'        => 1,
2536                 ];
2537
2538                 $signed = Diaspora::createLikeSignature($uid, $new_item);
2539                 if (!empty($signed)) {
2540                         $new_item['diaspora_signed_text'] = json_encode($signed);
2541                 }
2542
2543                 $new_item_id = self::insert($new_item);
2544
2545                 // If the parent item isn't visible then set it to visible
2546                 if (!$item['visible']) {
2547                         self::update(['visible' => true], ['id' => $item['id']]);
2548                 }
2549
2550                 $new_item['id'] = $new_item_id;
2551
2552                 Hook::callAll('post_local_end', $new_item);
2553
2554                 return true;
2555         }
2556
2557         /**
2558          * Fetch the SQL condition for the given user id
2559          *
2560          * @param integer $owner_id User ID for which the permissions should be fetched
2561          * @return array condition
2562          */
2563         public static function getPermissionsConditionArrayByUserId(int $owner_id)
2564         {
2565                 $local_user = local_user();
2566                 $remote_user = Session::getRemoteContactID($owner_id);
2567
2568                 // default permissions - anonymous user
2569                 $condition = ["`private` != ?", self::PRIVATE];
2570
2571                 if ($local_user && ($local_user == $owner_id)) {
2572                         // Profile owner - everything is visible
2573                         $condition = [];
2574                 } elseif ($remote_user) {
2575                          // Authenticated visitor - fetch the matching permissionsets
2576                         $permissionSets = DI::permissionSet()->selectByContactId($remote_user, $owner_id);
2577                         if (!empty($set)) {
2578                                 $condition = ["(`private` != ? OR (`private` = ? AND `wall`
2579                                         AND `psid` IN (" . implode(', ', array_fill(0, count($set), '?')) . ")))",
2580                                         self::PRIVATE, self::PRIVATE];
2581                                 $condition = array_merge($condition, $permissionSets->column('id'));
2582                         }
2583                 }
2584
2585                 return $condition;
2586         }
2587
2588         /**
2589          * Get a permission SQL string for the given user
2590          *
2591          * @param int $owner_id
2592          * @param string $table
2593          * @return string
2594          */
2595         public static function getPermissionsSQLByUserId(int $owner_id, string $table = '')
2596         {
2597                 $local_user = local_user();
2598                 $remote_user = Session::getRemoteContactID($owner_id);
2599
2600                 if (!empty($table)) {
2601                         $table = DBA::quoteIdentifier($table) . '.';
2602                 }
2603
2604                 /*
2605                  * Construct permissions
2606                  *
2607                  * default permissions - anonymous user
2608                  */
2609                 $sql = sprintf(" AND " . $table . "`private` != %d", self::PRIVATE);
2610
2611                 // Profile owner - everything is visible
2612                 if ($local_user && ($local_user == $owner_id)) {
2613                         $sql = '';
2614                 } elseif ($remote_user) {
2615                         /*
2616                          * Authenticated visitor. Unless pre-verified,
2617                          * check that the contact belongs to this $owner_id
2618                          * and load the groups the visitor belongs to.
2619                          * If pre-verified, the caller is expected to have already
2620                          * done this and passed the groups into this function.
2621                          */
2622                         $permissionSets = DI::permissionSet()->selectByContactId($remote_user, $owner_id);
2623
2624                         if (!empty($set)) {
2625                                 $sql_set = sprintf(" OR (" . $table . "`private` = %d AND " . $table . "`wall` AND " . $table . "`psid` IN (", self::PRIVATE) . implode(',', $permissionSets->column('id')) . "))";
2626                         } else {
2627                                 $sql_set = '';
2628                         }
2629
2630                         $sql = sprintf(" AND (" . $table . "`private` != %d", self::PRIVATE) . $sql_set . ")";
2631                 }
2632
2633                 return $sql;
2634         }
2635
2636         /**
2637          * get translated item type
2638          *
2639          * @param array                $item
2640          * @param \Friendica\Core\L10n $l10n
2641          * @return string
2642          */
2643         public static function postType(array $item, \Friendica\Core\L10n $l10n)
2644         {
2645                 if (!empty($item['event-id'])) {
2646                         return $l10n->t('event');
2647                 } elseif (!empty($item['resource-id'])) {
2648                         return $l10n->t('photo');
2649                 } elseif ($item['gravity'] == GRAVITY_ACTIVITY) {
2650                         return $l10n->t('activity');
2651                 } elseif ($item['gravity'] == GRAVITY_COMMENT) {
2652                         return $l10n->t('comment');
2653                 }
2654
2655                 return $l10n->t('post');
2656         }
2657
2658         /**
2659          * Sets the "rendered-html" field of the provided item
2660          *
2661          * Body is preserved to avoid side-effects as we modify it just-in-time for spoilers and private image links
2662          *
2663          * @param array $item
2664          *
2665          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
2666          * @todo Remove reference, simply return "rendered-html" and "rendered-hash"
2667          */
2668         public static function putInCache(&$item)
2669         {
2670                 // Save original body to prevent addons to modify it
2671                 $body = $item['body'];
2672
2673                 $rendered_hash = $item['rendered-hash'] ?? '';
2674                 $rendered_html = $item['rendered-html'] ?? '';
2675
2676                 if ($rendered_hash == ''
2677                         || $rendered_html == ''
2678                         || $rendered_hash != hash('md5', BBCode::VERSION . '::' . $body)
2679                         || DI::config()->get('system', 'ignore_cache')
2680                 ) {
2681                         self::addRedirToImageTags($item);
2682
2683                         $item['rendered-html'] = BBCode::convertForUriId($item['uri-id'], $item['body']);
2684                         $item['rendered-hash'] = hash('md5', BBCode::VERSION . '::' . $body);
2685
2686                         $hook_data = ['item' => $item, 'rendered-html' => $item['rendered-html'], 'rendered-hash' => $item['rendered-hash']];
2687                         Hook::callAll('put_item_in_cache', $hook_data);
2688                         $item['rendered-html'] = $hook_data['rendered-html'];
2689                         $item['rendered-hash'] = $hook_data['rendered-hash'];
2690                         unset($hook_data);
2691
2692                         // Update if the generated values differ from the existing ones
2693                         if ((($rendered_hash != $item['rendered-hash']) || ($rendered_html != $item['rendered-html'])) && !empty($item['id'])) {
2694                                 self::update(
2695                                         [
2696                                                 'rendered-html' => $item['rendered-html'],
2697                                                 'rendered-hash' => $item['rendered-hash']
2698                                         ],
2699                                         ['id' => $item['id']]
2700                                 );
2701                         }
2702                 }
2703
2704                 $item['body'] = $body;
2705         }
2706
2707         /**
2708          * Find any non-embedded images in private items and add redir links to them
2709          *
2710          * @param array &$item The field array of an item row
2711          */
2712         private static function addRedirToImageTags(array &$item)
2713         {
2714                 $app = DI::app();
2715
2716                 $matches = [];
2717                 $cnt = preg_match_all('|\[img\](http[^\[]*?/photo/[a-fA-F0-9]+?(-[0-9]\.[\w]+?)?)\[\/img\]|', $item['body'], $matches, PREG_SET_ORDER);
2718                 if ($cnt) {
2719                         foreach ($matches as $mtch) {
2720                                 if (strpos($mtch[1], '/redir') !== false) {
2721                                         continue;
2722                                 }
2723
2724                                 if ((local_user() == $item['uid']) && ($item['private'] == self::PRIVATE) && ($item['contact-id'] != $app->getContactId()) && ($item['network'] == Protocol::DFRN)) {
2725                                         $img_url = 'redir/' . $item['contact-id'] . '?url=' . urlencode($mtch[1]);
2726                                         $item['body'] = str_replace($mtch[0], '[img]' . $img_url . '[/img]', $item['body']);
2727                                 }
2728                         }
2729                 }
2730         }
2731
2732         /**
2733          * Given an item array, convert the body element from bbcode to html and add smilie icons.
2734          * If attach is true, also add icons for item attachments.
2735          *
2736          * @param array   $item
2737          * @param boolean $attach
2738          * @param boolean $is_preview
2739          * @return string item body html
2740          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
2741          * @throws \ImagickException
2742          * @hook  prepare_body_init item array before any work
2743          * @hook  prepare_body_content_filter ('item'=>item array, 'filter_reasons'=>string array) before first bbcode to html
2744          * @hook  prepare_body ('item'=>item array, 'html'=>body string, 'is_preview'=>boolean, 'filter_reasons'=>string array) after first bbcode to html
2745          * @hook  prepare_body_final ('item'=>item array, 'html'=>body string) after attach icons and blockquote special case handling (spoiler, author)
2746          */
2747         public static function prepareBody(array &$item, $attach = false, $is_preview = false)
2748         {
2749                 $a = DI::app();
2750                 Hook::callAll('prepare_body_init', $item);
2751
2752                 // In order to provide theme developers more possibilities, event items
2753                 // are treated differently.
2754                 if ($item['object-type'] === Activity\ObjectType::EVENT && isset($item['event-id'])) {
2755                         $ev = Event::getItemHTML($item);
2756                         return $ev;
2757                 }
2758
2759                 $tags = Tag::populateFromItem($item);
2760
2761                 $item['tags'] = $tags['tags'];
2762                 $item['hashtags'] = $tags['hashtags'];
2763                 $item['mentions'] = $tags['mentions'];
2764
2765                 $body = $item['body'] ?? '';
2766                 $shared = BBCode::fetchShareAttributes($body);
2767                 if (!empty($shared['guid'])) {
2768                         $shared_item = Post::selectFirst(['uri-id', 'plink'], ['guid' => $shared['guid']]);
2769                         $shared_uri_id = $shared_item['uri-id'] ?? 0;
2770                         $shared_links = [strtolower($shared_item['plink'] ?? '')];
2771                         $shared_attachments = Post\Media::splitAttachments($shared_uri_id, $shared['guid']);
2772                         $shared_links = array_merge($shared_links, array_column($shared_attachments['visual'], 'url'));
2773                         $shared_links = array_merge($shared_links, array_column($shared_attachments['link'], 'url'));
2774                         $shared_links = array_merge($shared_links, array_column($shared_attachments['additional'], 'url'));
2775                         $item['body'] = self::replaceVisualAttachments($shared_attachments, $item['body']);
2776                 } else {
2777                         $shared_uri_id = 0;
2778                         $shared_links = [];
2779                 }
2780                 $attachments = Post\Media::splitAttachments($item['uri-id'], $item['guid'] ?? '', $shared_links);
2781                 $item['body'] = self::replaceVisualAttachments($attachments, $item['body'] ?? '');
2782
2783                 $item['body'] = preg_replace("/\s*\[attachment .*?\].*?\[\/attachment\]\s*/ism", "\n", $item['body']);
2784                 self::putInCache($item);
2785                 $item['body'] = $body;
2786                 $s = $item["rendered-html"];
2787
2788                 // Compile eventual content filter reasons
2789                 $filter_reasons = [];
2790                 if (!$is_preview && public_contact() != $item['author-id']) {
2791                         if (!empty($item['content-warning']) && (!local_user() || !DI::pConfig()->get(local_user(), 'system', 'disable_cw', false))) {
2792                                 $filter_reasons[] = DI::l10n()->t('Content warning: %s', $item['content-warning']);
2793                         }
2794
2795                         $item['attachments'] = $attachments;
2796
2797                         $hook_data = [
2798                                 'item' => $item,
2799                                 'filter_reasons' => $filter_reasons
2800                         ];
2801                         Hook::callAll('prepare_body_content_filter', $hook_data);
2802                         $filter_reasons = $hook_data['filter_reasons'];
2803                         unset($hook_data);
2804                 }
2805
2806                 $hook_data = [
2807                         'item' => $item,
2808                         'html' => $s,
2809                         'preview' => $is_preview,
2810                         'filter_reasons' => $filter_reasons
2811                 ];
2812                 Hook::callAll('prepare_body', $hook_data);
2813                 $s = $hook_data['html'];
2814                 unset($hook_data);
2815
2816                 if (!$attach) {
2817                         // Replace the blockquotes with quotes that are used in mails.
2818                         $mailquote = '<blockquote type="cite" class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">';
2819                         $s = str_replace(['<blockquote>', '<blockquote class="spoiler">', '<blockquote class="author">'], [$mailquote, $mailquote, $mailquote], $s);
2820                         return $s;
2821                 }
2822
2823                 if (!empty($shared_attachments)) {
2824                         $s = self::addVisualAttachments($shared_attachments, $item, $s, true);
2825                         $s = self::addLinkAttachment($shared_uri_id ?: $item['uri-id'], $shared_attachments, $body, $s, true, []);
2826                         $s = self::addNonVisualAttachments($shared_attachments, $item, $s, true);
2827                         $body = preg_replace("/\s*\[share .*?\].*?\[\/share\]\s*/ism", '', $body);
2828                 }
2829
2830                 $s = self::addVisualAttachments($attachments, $item, $s, false);
2831                 $s = self::addLinkAttachment($item['uri-id'], $attachments, $body, $s, false, $shared_links);
2832                 $s = self::addNonVisualAttachments($attachments, $item, $s, false);
2833
2834                 // Map.
2835                 if (strpos($s, '<div class="map">') !== false && !empty($item['coord'])) {
2836                         $x = Map::byCoordinates(trim($item['coord']));
2837                         if ($x) {
2838                                 $s = preg_replace('/\<div class\=\"map\"\>/', '$0' . $x, $s);
2839                         }
2840                 }
2841
2842                 // Replace friendica image url size with theme preference.
2843                 if (!empty($a->getThemeInfoValue('item_image_size'))) {
2844                         $ps = $a->getThemeInfoValue('item_image_size');
2845                         $s = preg_replace('|(<img[^>]+src="[^"]+/photo/[0-9a-f]+)-[0-9]|', "$1-" . $ps, $s);
2846                 }
2847
2848                 $s = HTML::applyContentFilter($s, $filter_reasons);
2849
2850                 $hook_data = ['item' => $item, 'html' => $s];
2851                 Hook::callAll('prepare_body_final', $hook_data);
2852
2853                 return $hook_data['html'];
2854         }
2855
2856         /**
2857          * Check if the body contains a link
2858          *
2859          * @param string $body
2860          * @param string $url
2861          * @param int    $type
2862          * @return bool
2863          */
2864         public static function containsLink(string $body, string $url, int $type = 0)
2865         {
2866                 // Make sure that for example site parameters aren't used when testing if the link is contained in the body
2867                 $urlparts = parse_url($url);
2868                 unset($urlparts['query']);
2869                 unset($urlparts['fragment']);
2870                 $url = Network::unparseURL($urlparts);
2871
2872                 // Remove media links to only search in embedded content
2873                 // @todo Check images for image link, audio for audio links, ...
2874                 if (in_array($type, [Post\Media::AUDIO, Post\Media::VIDEO, Post\Media::IMAGE])) {
2875                         $body = preg_replace("/\[url=[^\[\]]*\](.*)\[\/url\]/Usi", ' $1 ', $body);
2876                 }
2877
2878                 if (strpos($body, $url)) {
2879                         return true;
2880                 }
2881                 foreach ([0, 1, 2] as $size) {
2882                         if (preg_match('#/photo/.*-' . $size . '\.#ism', $url) &&
2883                                 strpos(preg_replace('#(/photo/.*)-[012]\.#ism', '$1-' . $size . '.', $body), $url)) {
2884                                 return true;
2885                         }
2886                 }
2887                 return false;
2888         }
2889
2890         /**
2891          * Replace visual attachments in the body
2892          *
2893          * @param array $attachments
2894          * @param string $body
2895          * @return string modified body
2896          */
2897         private static function replaceVisualAttachments(array $attachments, string $body)
2898         {
2899                 DI::profiler()->startRecording('rendering');
2900
2901                 foreach ($attachments['visual'] as $attachment) {
2902                         if (!empty($attachment['preview'])) {
2903                                 $body = str_replace($attachment['preview'], Post\Media::getPreviewUrlForId($attachment['id'], Proxy::SIZE_LARGE), $body);
2904                         } elseif ($attachment['filetype'] == 'image') {
2905                                 $body = str_replace($attachment['url'], Post\Media::getUrlForId($attachment['id']), $body);
2906                         }
2907                 }
2908                 DI::profiler()->stopRecording();
2909                 return $body;
2910         }
2911
2912         /**
2913          * Add visual attachments to the content
2914          *
2915          * @param array $attachments
2916          * @param array $item
2917          * @param string $content
2918          * @return string modified content
2919          */
2920         private static function addVisualAttachments(array $attachments, array $item, string $content, bool $shared)
2921         {
2922                 DI::profiler()->startRecording('rendering');
2923                 $leading = '';
2924                 $trailing = '';
2925
2926                 // @todo In the future we should make a single for the template engine with all media in it. This allows more flexibilty.
2927                 foreach ($attachments['visual'] as $attachment) {
2928                         if (self::containsLink($item['body'], $attachment['preview'] ?? $attachment['url'], $attachment['type'])) {
2929                                 continue;
2930                         }
2931
2932                         if (!empty($attachment['preview'])) {
2933                                 $preview_url = Post\Media::getPreviewUrlForId($attachment['id'], Proxy::SIZE_LARGE);
2934                         } else {
2935                                 $preview_url = '';
2936                         }
2937
2938                         if (($attachment['filetype'] == 'video')) {
2939                                 /// @todo Move the template to /content as well
2940                                 $media = Renderer::replaceMacros(Renderer::getMarkupTemplate('video_top.tpl'), [
2941                                         '$video' => [
2942                                                 'id'      => $attachment['id'],
2943                                                 'src'     => $attachment['url'],
2944                                                 'name'    => $attachment['name'] ?: $attachment['url'],
2945                                                 'preview' => $preview_url,
2946                                                 'mime'    => $attachment['mimetype'],
2947                                         ],
2948                                 ]);
2949                                 if (($item['post-type'] ?? null) == Item::PT_VIDEO) {
2950                                         $leading .= $media;
2951                                 } else {
2952                                         $trailing .= $media;
2953                                 }
2954                         } elseif ($attachment['filetype'] == 'audio') {
2955                                 $media = Renderer::replaceMacros(Renderer::getMarkupTemplate('content/audio.tpl'), [
2956                                         '$audio' => [
2957                                                 'id'     => $attachment['id'],
2958                                                 'src'    => $attachment['url'],
2959                                                 'name'   => $attachment['name'] ?: $attachment['url'],
2960                                                 'mime'   => $attachment['mimetype'],
2961                                         ],
2962                                 ]);
2963                                 if (($item['post-type'] ?? null) == Item::PT_AUDIO) {
2964                                         $leading .= $media;
2965                                 } else {
2966                                         $trailing .= $media;
2967                                 }
2968                         } elseif ($attachment['filetype'] == 'image') {
2969                                 $media = Renderer::replaceMacros(Renderer::getMarkupTemplate('content/image.tpl'), [
2970                                         '$image' => [
2971                                                 'src'        => Post\Media::getUrlForId($attachment['id']),
2972                                                 'preview'    => Post\Media::getPreviewUrlForId($attachment['id'], ($attachment['width'] > $attachment['height']) ? Proxy::SIZE_MEDIUM : Proxy::SIZE_LARGE),
2973                                                 'attachment' => $attachment,
2974                                         ],
2975                                 ]);
2976                                 // On Diaspora posts the attached pictures are leading
2977                                 if ($item['network'] == Protocol::DIASPORA) {
2978                                         $leading .= $media;
2979                                 } else {
2980                                         $trailing .= $media;
2981                                 }
2982                         }
2983                 }
2984
2985                 if ($shared) {
2986                         $content = str_replace(BBCode::TOP_ANCHOR, '<div class="body-attach">' . $leading . '<div class="clear"></div></div>' . BBCode::TOP_ANCHOR, $content);
2987                         $content = str_replace(BBCode::BOTTOM_ANCHOR, '<div class="body-attach">' . $trailing . '<div class="clear"></div></div>' . BBCode::BOTTOM_ANCHOR, $content);
2988                 } else {
2989                         if ($leading != '') {
2990                                 $content = '<div class="body-attach">' . $leading . '<div class="clear"></div></div>' . $content;
2991                         }
2992
2993                         if ($trailing != '') {
2994                                 $content .= '<div class="body-attach">' . $trailing . '<div class="clear"></div></div>';
2995                         }
2996                 }
2997
2998                 DI::profiler()->stopRecording();
2999                 return $content;
3000         }
3001
3002         /**
3003          * Add link attachment to the content
3004          *
3005          * @param array  $attachments
3006          * @param string $body
3007          * @param string $content
3008          * @param bool   $shared
3009          * @param array  $ignore_links A list of URLs to ignore
3010          * @return string modified content
3011          */
3012         private static function addLinkAttachment(int $uriid, array $attachments, string $body, string $content, bool $shared, array $ignore_links)
3013         {
3014                 DI::profiler()->startRecording('rendering');
3015                 // Don't show a preview when there is a visual attachment (audio or video)
3016                 $types = array_column($attachments['visual'], 'type');
3017                 $preview = !in_array(Post\Media::IMAGE, $types) && !in_array(Post\Media::VIDEO, $types);
3018
3019                 if (!empty($attachments['link'])) {
3020                         foreach ($attachments['link'] as $link) {
3021                                 $found = false;
3022                                 foreach ($ignore_links as $ignore_link) {
3023                                         if (Strings::compareLink($link['url'], $ignore_link)) {
3024                                                 $found = true;
3025                                         }
3026                                 }
3027                                 // @todo Judge between the links to use the one with most information
3028                                 if (!$found && (empty($attachment) || !empty($link['author-name']) ||
3029                                         (empty($attachment['name']) && !empty($link['name'])) ||
3030                                         (empty($attachment['description']) && !empty($link['description'])) ||
3031                                         (empty($attachment['preview']) && !empty($link['preview'])))) {
3032                                         $attachment = $link;
3033                                 }
3034                         }
3035                 }
3036
3037                 if (!empty($attachment)) {
3038                         $data = [
3039                                 'after' => '',
3040                                 'author_name' => $attachment['author-name'] ?? '',
3041                                 'author_url' =>  $attachment['author-url'] ?? '',
3042                                 'description' => $attachment['description'] ?? '',
3043                                 'image' => '',
3044                                 'preview' => '',
3045                                 'provider_name' => $attachment['publisher-name'] ?? '',
3046                                 'provider_url' => $attachment['publisher-url'] ?? '',
3047                                 'text' => '',
3048                                 'title' => $attachment['name'] ?? '',
3049                                 'type' => 'link',
3050                                 'url' => $attachment['url']];
3051
3052                         if ($preview && !empty($attachment['preview'])) {
3053                                 if ($attachment['preview-width'] >= 500) {
3054                                         $data['image'] = Post\Media::getPreviewUrlForId($attachment['id'], Proxy::SIZE_MEDIUM);
3055                                 } else {
3056                                         $data['preview'] = Post\Media::getPreviewUrlForId($attachment['id'], Proxy::SIZE_MEDIUM);
3057                                 }
3058                         }
3059
3060                         if (!empty($data['description']) && !empty($content)) {
3061                                 similar_text($data['description'], $content, $percent);
3062                         } else {
3063                                 $percent = 0;
3064                         }
3065
3066                         if (!empty($data['description']) && (($data['title'] == $data['description']) || ($percent > 95) || (strpos($content, $data['description']) !== false))) {
3067                                 $data['description'] = '';
3068                         }
3069
3070                         if (($data['author_name'] ?? '') == ($data['provider_name'] ?? '')) {
3071                                 $data['author_name'] = '';
3072                         }
3073
3074                         if (($data['author_url'] ?? '') == ($data['provider_url'] ?? '')) {
3075                                 $data['author_url'] = '';
3076                         }
3077                 } elseif (preg_match("/.*(\[attachment.*?\].*?\[\/attachment\]).*/ism", $body, $match)) {
3078                         $data = BBCode::getAttachmentData($match[1]);
3079                 }
3080                 DI::profiler()->stopRecording();
3081
3082                 if (isset($data['url']) && !in_array($data['url'], $ignore_links)) {
3083                         if (!empty($data['description']) || !empty($data['image']) || !empty($data['preview'])) {
3084                                 $parts = parse_url($data['url']);
3085                                 if (!empty($parts['scheme']) && !empty($parts['host'])) {
3086                                         if (empty($data['provider_name'])) {
3087                                                 $data['provider_name'] = $parts['host'];
3088                                         }
3089                                         if (empty($data['provider_url']) || empty(parse_url($data['provider_url'], PHP_URL_SCHEME))) {
3090                                                 $data['provider_url'] = $parts['scheme'] . '://' . $parts['host'];
3091
3092                                                 if (!empty($parts['port'])) {
3093                                                         $data['provider_url'] .= ':' . $parts['port'];
3094                                                 }
3095                                         }
3096                                 }
3097
3098                                 // @todo Use a template
3099                                 $rendered = BBCode::convertAttachment('', BBCode::INTERNAL, false, $data, $uriid);
3100                         } elseif (!self::containsLink($content, $data['url'], Post\Media::HTML)) {
3101                                 $rendered = Renderer::replaceMacros(Renderer::getMarkupTemplate('content/link.tpl'), [
3102                                         '$url'  => $data['url'],
3103                                         '$title' => $data['title'],
3104                                 ]);
3105                         } else {
3106                                 return $content;
3107                         }
3108
3109                         if ($shared) {
3110                                 return str_replace(BBCode::BOTTOM_ANCHOR, BBCode::BOTTOM_ANCHOR . $rendered, $content);
3111                         } else {
3112                                 return $content . $rendered;
3113                         }
3114                 }
3115                 return $content;
3116         }
3117
3118         /**
3119          * Add non visual attachments to the content
3120          *
3121          * @param array $attachments
3122          * @param array $item
3123          * @param string $content
3124          * @return string modified content
3125          */
3126         private static function addNonVisualAttachments(array $attachments, array $item, string $content)
3127         {
3128                 DI::profiler()->startRecording('rendering');
3129                 $trailing = '';
3130                 foreach ($attachments['additional'] as $attachment) {
3131                         if (strpos($item['body'], $attachment['url'])) {
3132                                 continue;
3133                         }
3134
3135                         $author = ['uid' => 0, 'id' => $item['author-id'],
3136                                 'network' => $item['author-network'], 'url' => $item['author-link']];
3137                         $the_url = Contact::magicLinkByContact($author, $attachment['url']);
3138
3139                         $title = Strings::escapeHtml(trim(($attachment['description'] ?? '') ?: $attachment['url']));
3140
3141                         if (!empty($attachment['size'])) {
3142                                 $title .= ' ' . $attachment['size'] . ' ' . DI::l10n()->t('bytes');
3143                         }
3144
3145                         /// @todo Use a template
3146                         $icon = '<div class="attachtype icon s22 type-' . $attachment['filetype'] . ' subtype-' . $attachment['subtype'] . '"></div>';
3147                         $trailing .= '<a href="' . strip_tags($the_url) . '" title="' . $title . '" class="attachlink" target="_blank" rel="noopener noreferrer" >' . $icon . '</a>';
3148                 }
3149
3150                 if ($trailing != '') {
3151                         $content .= '<div class="body-attach">' . $trailing . '<div class="clear"></div></div>';
3152                 }
3153
3154                 DI::profiler()->stopRecording();
3155                 return $content;
3156         }
3157
3158         /**
3159          * get private link for item
3160          *
3161          * @param array $item
3162          * @return boolean|array False if item has not plink, otherwise array('href'=>plink url, 'title'=>translated title)
3163          * @throws \Exception
3164          */
3165         public static function getPlink($item)
3166         {
3167                 if (local_user()) {
3168                         $ret = [
3169                                 'href' => "display/" . $item['guid'],
3170                                 'orig' => "display/" . $item['guid'],
3171                                 'title' => DI::l10n()->t('View on separate page'),
3172                                 'orig_title' => DI::l10n()->t('View on separate page'),
3173                         ];
3174
3175                         if (!empty($item['plink'])) {
3176                                 $ret['href'] = DI::baseUrl()->remove($item['plink']);
3177                                 $ret['title'] = DI::l10n()->t('Link to source');
3178                         }
3179                 } elseif (!empty($item['plink']) && ($item['private'] != self::PRIVATE)) {
3180                         $ret = [
3181                                 'href' => $item['plink'],
3182                                 'orig' => $item['plink'],
3183                                 'title' => DI::l10n()->t('Link to source'),
3184                                 'orig_title' => DI::l10n()->t('Link to source'),
3185                         ];
3186                 } else {
3187                         $ret = [];
3188                 }
3189
3190                 return $ret;
3191         }
3192
3193         /**
3194          * Is the given item array a post that is sent as starting post to a forum?
3195          *
3196          * @param array $item
3197          * @param array $owner
3198          *
3199          * @return boolean "true" when it is a forum post
3200          */
3201         public static function isForumPost(array $item, array $owner = [])
3202         {
3203                 if (empty($owner)) {
3204                         $owner = User::getOwnerDataById($item['uid']);
3205                         if (empty($owner)) {
3206                                 return false;
3207                         }
3208                 }
3209
3210                 if (($item['author-id'] == $item['owner-id']) ||
3211                         ($owner['id'] == $item['contact-id']) ||
3212                         ($item['uri-id'] != $item['parent-uri-id']) ||
3213                         $item['origin']) {
3214                         return false;
3215                 }
3216
3217                 return Contact::isForum($item['contact-id']);
3218         }
3219
3220         /**
3221          * Search item id for given URI or plink
3222          *
3223          * @param string $uri
3224          * @param integer $uid
3225          *
3226          * @return integer item id
3227          */
3228         public static function searchByLink($uri, $uid = 0)
3229         {
3230                 $ssl_uri = str_replace('http://', 'https://', $uri);
3231                 $uris = [$uri, $ssl_uri, Strings::normaliseLink($uri)];
3232
3233                 $item = Post::selectFirst(['id'], ['uri' => $uris, 'uid' => $uid]);
3234                 if (DBA::isResult($item)) {
3235                         return $item['id'];
3236                 }
3237
3238                 $item = Post::selectFirst(['id'], ['plink' => $uris, 'uid' => $uid]);
3239                 if (DBA::isResult($item)) {
3240                         return $item['id'];
3241                 }
3242
3243                 return 0;
3244         }
3245
3246         /**
3247          * Return the URI for a link to the post
3248          *
3249          * @param string $uri URI or link to post
3250          *
3251          * @return string URI
3252          */
3253         public static function getURIByLink(string $uri)
3254         {
3255                 $ssl_uri = str_replace('http://', 'https://', $uri);
3256                 $uris = [$uri, $ssl_uri, Strings::normaliseLink($uri)];
3257
3258                 $item = Post::selectFirst(['uri'], ['uri' => $uris]);
3259                 if (DBA::isResult($item)) {
3260                         return $item['uri'];
3261                 }
3262
3263                 $item = Post::selectFirst(['uri'], ['plink' => $uris]);
3264                 if (DBA::isResult($item)) {
3265                         return $item['uri'];
3266                 }
3267
3268                 return '';
3269         }
3270
3271         /**
3272          * Fetches item for given URI or plink
3273          *
3274          * @param string $uri
3275          * @param integer $uid
3276          *
3277          * @return integer item id
3278          */
3279         public static function fetchByLink(string $uri, int $uid = 0)
3280         {
3281                 Logger::info('Trying to fetch link', ['uid' => $uid, 'uri' => $uri]);
3282                 $item_id = self::searchByLink($uri, $uid);
3283                 if (!empty($item_id)) {
3284                         Logger::info('Link found', ['uid' => $uid, 'uri' => $uri, 'id' => $item_id]);
3285                         return $item_id;
3286                 }
3287
3288                 $hookData = [
3289                         'uri'     => $uri,
3290                         'uid'     => $uid,
3291                         'item_id' => null,
3292                 ];
3293
3294                 Hook::callAll('item_by_link', $hookData);
3295
3296                 if (isset($hookData['item_id'])) {
3297                         return is_numeric($hookData['item_id']) ? $hookData['item_id'] : 0;
3298                 }
3299
3300                 if ($fetched_uri = ActivityPub\Processor::fetchMissingActivity($uri)) {
3301                         $item_id = self::searchByLink($fetched_uri, $uid);
3302                 } else {
3303                         $item_id = Diaspora::fetchByURL($uri);
3304                 }
3305
3306                 if (!empty($item_id)) {
3307                         Logger::info('Link fetched', ['uid' => $uid, 'uri' => $uri, 'id' => $item_id]);
3308                         return $item_id;
3309                 }
3310
3311                 Logger::info('Link not found', ['uid' => $uid, 'uri' => $uri]);
3312                 return 0;
3313         }
3314
3315         /**
3316          * Return share data from an item array (if the item is shared item)
3317          * We are providing the complete Item array, because at some time in the future
3318          * we hopefully will define these values not in the body anymore but in some item fields.
3319          * This function is meant to replace all similar functions in the system.
3320          *
3321          * @param array $item
3322          *
3323          * @return array with share information
3324          */
3325         public static function getShareArray($item)
3326         {
3327                 if (!preg_match("/(.*?)\[share(.*?)\]\s?(.*?)\s?\[\/share\]\s?/ism", $item['body'], $matches)) {
3328                         return [];
3329                 }
3330
3331                 $attribute_string = $matches[2];
3332                 $attributes = ['comment' => trim($matches[1]), 'shared' => trim($matches[3])];
3333                 foreach (['author', 'profile', 'avatar', 'guid', 'posted', 'link'] as $field) {
3334                         if (preg_match("/$field=(['\"])(.+?)\\1/ism", $attribute_string, $matches)) {
3335                                 $attributes[$field] = trim(html_entity_decode($matches[2] ?? '', ENT_QUOTES, 'UTF-8'));
3336                         }
3337                 }
3338                 return $attributes;
3339         }
3340
3341         /**
3342          * Fetch item information for shared items from the original items and adds it.
3343          *
3344          * @param array $item
3345          *
3346          * @return array item array with data from the original item
3347          */
3348         public static function addShareDataFromOriginal(array $item)
3349         {
3350                 $shared = self::getShareArray($item);
3351                 if (empty($shared)) {
3352                         return $item;
3353                 }
3354
3355                 // Real reshares always have got a GUID.
3356                 if (empty($shared['guid'])) {
3357                         return $item;
3358                 }
3359
3360                 $uid = $item['uid'] ?? 0;
3361
3362                 // first try to fetch the item via the GUID. This will work for all reshares that had been created on this system
3363                 $shared_item = Post::selectFirst(['title', 'body'], ['guid' => $shared['guid'], 'uid' => [0, $uid]]);
3364                 if (!DBA::isResult($shared_item)) {
3365                         if (empty($shared['link'])) {
3366                                 return $item;
3367                         }
3368
3369                         // Otherwhise try to find (and possibly fetch) the item via the link. This should work for Diaspora and ActivityPub posts
3370                         $id = self::fetchByLink($shared['link'] ?? '', $uid);
3371                         if (empty($id)) {
3372                                 Logger::info('Original item not found', ['url' => $shared['link'] ?? '', 'callstack' => System::callstack()]);
3373                                 return $item;
3374                         }
3375
3376                         $shared_item = Post::selectFirst(['title', 'body'], ['id' => $id]);
3377                         if (!DBA::isResult($shared_item)) {
3378                                 return $item;
3379                         }
3380                         Logger::info('Got shared data from url', ['url' => $shared['link'], 'callstack' => System::callstack()]);
3381                 } else {
3382                         Logger::info('Got shared data from guid', ['guid' => $shared['guid'], 'callstack' => System::callstack()]);
3383                 }
3384
3385                 if (!empty($shared_item['title'])) {
3386                         $body = '[h3]' . $shared_item['title'] . "[/h3]\n" . $shared_item['body'];
3387                         unset($shared_item['title']);
3388                 } else {
3389                         $body = $shared_item['body'];
3390                 }
3391
3392                 $item['body'] = preg_replace("/\[share ([^\[\]]*)\].*\[\/share\]/ism", '[share $1]' . str_replace('$', '\$', $body) . '[/share]', $item['body']);
3393                 unset($shared_item['body']);
3394
3395                 return array_merge($item, $shared_item);
3396         }
3397
3398         /**
3399          * Check a prospective item array against user-level permissions
3400          *
3401          * @param array $item Expected keys: uri, gravity, and
3402          *                    author-link if is author-id is set,
3403          *                    owner-link if is owner-id is set,
3404          *                    causer-link if is causer-id is set.
3405          * @param int   $user_id Local user ID
3406          * @return bool
3407          * @throws \Exception
3408          */
3409         protected static function isAllowedByUser(array $item, int $user_id)
3410         {
3411                 if (!empty($item['author-id']) && Contact\User::isBlocked($item['author-id'], $user_id)) {
3412                         Logger::notice('Author is blocked by user', ['author-link' => $item['author-link'], 'uid' => $user_id, 'item-uri' => $item['uri']]);
3413                         return false;
3414                 }
3415
3416                 if (!empty($item['owner-id']) && Contact\User::isBlocked($item['owner-id'], $user_id)) {
3417                         Logger::notice('Owner is blocked by user', ['owner-link' => $item['owner-link'], 'uid' => $user_id, 'item-uri' => $item['uri']]);
3418                         return false;
3419                 }
3420
3421                 // The causer is set during a thread completion, for example because of a reshare. It countains the responsible actor.
3422                 if (!empty($item['causer-id']) && Contact\User::isBlocked($item['causer-id'], $user_id)) {
3423                         Logger::notice('Causer is blocked by user', ['causer-link' => $item['causer-link'] ?? $item['causer-id'], 'uid' => $user_id, 'item-uri' => $item['uri']]);
3424                         return false;
3425                 }
3426
3427                 if (!empty($item['causer-id']) && ($item['gravity'] === GRAVITY_PARENT) && Contact\User::isIgnored($item['causer-id'], $user_id)) {
3428                         Logger::notice('Causer is ignored by user', ['causer-link' => $item['causer-link'] ?? $item['causer-id'], 'uid' => $user_id, 'item-uri' => $item['uri']]);
3429                         return false;
3430                 }
3431
3432                 return true;
3433         }
3434
3435         /**
3436          * Improve the data in shared posts
3437          *
3438          * @param array $item
3439          * @return string body
3440          */
3441         public static function improveSharedDataInBody(array $item)
3442         {
3443                 $shared = BBCode::fetchShareAttributes($item['body']);
3444                 if (empty($shared['link'])) {
3445                         return $item['body'];
3446                 }
3447
3448                 $id = self::fetchByLink($shared['link']);
3449                 Logger::info('Fetched shared post', ['uri-id' => $item['uri-id'], 'id' => $id, 'author' => $shared['profile'], 'url' => $shared['link'], 'guid' => $shared['guid'], 'callstack' => System::callstack()]);
3450                 if (!$id) {
3451                         return $item['body'];
3452                 }
3453
3454                 $shared_item = Post::selectFirst(['author-name', 'author-link', 'author-avatar', 'plink', 'created', 'guid', 'title', 'body'], ['id' => $id]);
3455                 if (!DBA::isResult($shared_item)) {
3456                         return $item['body'];
3457                 }
3458
3459                 $shared_content = BBCode::getShareOpeningTag($shared_item['author-name'], $shared_item['author-link'], $shared_item['author-avatar'], $shared_item['plink'], $shared_item['created'], $shared_item['guid']);
3460
3461                 if (!empty($shared_item['title'])) {
3462                         $shared_content .= '[h3]'.$shared_item['title'].'[/h3]'."\n";
3463                 }
3464
3465                 $shared_content .= $shared_item['body'];
3466
3467                 $item['body'] = preg_replace("/\[share.*?\](.*)\[\/share\]/ism", $shared_content . '[/share]', $item['body']);
3468                 Logger::info('New shared data', ['uri-id' => $item['uri-id'], 'id' => $id, 'shared_item' => $shared_item]);
3469                 return $item['body'];
3470         }
3471 }