src/Model/Item.php

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