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' => $item_id]);
 362
 363                 return true;
 364         }
 365
 366         private static function guid($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', [
 472                                 'guid' => $item['guid'],
 473                                 'uid' => $item['uid'],
 474                                 'network' => $item['network']
 475                         ]);
 476                         return true;
 477                 }
 478
 479                 $condition = ['uri-id' => $item['uri-id'], 'uid' => $item['uid'],
 480                         'network' => [$item['network'], Protocol::DFRN]];
 481                 if (Post::exists($condition)) {
 482                         Logger::notice('duplicated item with the same uri found.', $item);
 483                         return true;
 484                 }
 485
 486                 // On Friendica and Diaspora the GUID is unique
 487                 if (in_array($item['network'], [Protocol::DFRN, Protocol::DIASPORA])) {
 488                         $condition = ['guid' => $item['guid'], 'uid' => $item['uid']];
 489                         if (Post::exists($condition)) {
 490                                 Logger::notice('duplicated item with the same guid found.', $item);
 491                                 return true;
 492                         }
 493                 } elseif ($item['network'] == Protocol::OSTATUS) {
 494                         // Check for an existing post with the same content. There seems to be a problem with OStatus.
 495                         $condition = ["`body` = ? AND `network` = ? AND `created` = ? AND `contact-id` = ? AND `uid` = ?",
 496                                         $item['body'], $item['network'], $item['created'], $item['contact-id'], $item['uid']];
 497                         if (Post::exists($condition)) {
 498                                 Logger::notice('duplicated item with the same body found.', $item);
 499                                 return true;
 500                         }
 501                 }
 502
 503                 /*
 504                  * Check for already added items.
 505                  * There is a timing issue here that sometimes creates double postings.
 506                  * An unique index would help - but the limitations of MySQL (maximum size of index values) prevent this.
 507                  */
 508                 if (($item['uid'] == 0) && Post::exists(['uri-id' => $item['uri-id'], 'uid' => 0])) {
 509                         Logger::notice('Global item already stored.', ['uri-id' => $item['uri-id'], 'network' => $item['network']]);
 510                         return true;
 511                 }
 512
 513                 return false;
 514         }
 515
 516         /**
 517          * Check if the item array is valid
 518          *
 519          * @param array $item
 520          * @return boolean item is valid
 521          */
 522         public static function isValid(array $item)
 523         {
 524                 // When there is no content then we don't post it
 525                 if (($item['body'] . $item['title'] == '') && (empty($item['uri-id']) || !Post\Media::existsByURIId($item['uri-id']))) {
 526                         Logger::notice('No body, no title.');
 527                         return false;
 528                 }
 529
 530                 if (!empty($item['uid'])) {
 531                         $owner = User::getOwnerDataById($item['uid'], false);
 532                         if (!$owner) {
 533                                 Logger::notice('Missing item user owner data', ['uid' => $item['uid']]);
 534                                 return false;
 535                         }
 536
 537                         if ($owner['account_expired'] || $owner['account_removed']) {
 538                                 Logger::notice('Item user has been deleted/expired/removed', ['uid' => $item['uid'], 'deleted' => $owner['deleted'], 'account_expired' => $owner['account_expired'], 'account_removed' => $owner['account_removed']]);
 539                                 return false;
 540                         }
 541                 }
 542
 543                 if (!empty($item['author-id']) && Contact::isBlocked($item['author-id'])) {
 544                         Logger::notice('Author is blocked node-wide', ['author-link' => $item['author-link'], 'item-uri' => $item['uri']]);
 545                         return false;
 546                 }
 547
 548                 if (!empty($item['author-link']) && Network::isUrlBlocked($item['author-link'])) {
 549                         Logger::notice('Author server is blocked', ['author-link' => $item['author-link'], 'item-uri' => $item['uri']]);
 550                         return false;
 551                 }
 552
 553                 if (!empty($item['owner-id']) && Contact::isBlocked($item['owner-id'])) {
 554                         Logger::notice('Owner is blocked node-wide', ['owner-link' => $item['owner-link'], 'item-uri' => $item['uri']]);
 555                         return false;
 556                 }
 557
 558                 if (!empty($item['owner-link']) && Network::isUrlBlocked($item['owner-link'])) {
 559                         Logger::notice('Owner server is blocked', ['owner-link' => $item['owner-link'], 'item-uri' => $item['uri']]);
 560                         return false;
 561                 }
 562
 563                 if (!empty($item['uid']) && !self::isAllowedByUser($item, $item['uid'])) {
 564                         return false;
 565                 }
 566
 567                 if ($item['verb'] == Activity::FOLLOW) {
 568                         if (!$item['origin'] && ($item['author-id'] == Contact::getPublicIdByUserId($item['uid']))) {
 569                                 // Our own follow request can be relayed to us. We don't store it to avoid notification chaos.
 570                                 Logger::info("Follow: Don't store not origin follow request", ['parent-uri' => $item['parent-uri']]);
 571                                 return false;
 572                         }
 573
 574                         $condition = ['verb' => Activity::FOLLOW, 'uid' => $item['uid'],
 575                                 'parent-uri' => $item['parent-uri'], 'author-id' => $item['author-id']];
 576                         if (Post::exists($condition)) {
 577                                 // It happens that we receive multiple follow requests by the same author - we only store one.
 578                                 Logger::info('Follow: Found existing follow request from author', ['author-id' => $item['author-id'], 'parent-uri' => $item['parent-uri']]);
 579                                 return false;
 580                         }
 581                 }
 582
 583                 return true;
 584         }
 585
 586         /**
 587          * Check if the item array is too old
 588          *
 589          * @param array $item
 590          * @return boolean item is too old
 591          */
 592         public static function isTooOld(array $item)
 593         {
 594                 // check for create date and expire time
 595                 $expire_interval = DI::config()->get('system', 'dbclean-expire-days', 0);
 596
 597                 $user = DBA::selectFirst('user', ['expire'], ['uid' => $item['uid']]);
 598                 if (DBA::isResult($user) && ($user['expire'] > 0) && (($user['expire'] < $expire_interval) || ($expire_interval == 0))) {
 599                         $expire_interval = $user['expire'];
 600                 }
 601
 602                 if (($expire_interval > 0) && !empty($item['created'])) {
 603                         $expire_date = time() - ($expire_interval * 86400);
 604                         $created_date = strtotime($item['created']);
 605                         if ($created_date < $expire_date) {
 606                                 Logger::notice('Item created before expiration interval.', [
 607                                         'created' => date('c', $created_date),
 608                                         'expired' => date('c', $expire_date),
 609                                         '$item' => $item
 610                                 ]);
 611                                 return true;
 612                         }
 613                 }
 614
 615                 return false;
 616         }
 617
 618         /**
 619          * Return the id of the given item array if it has been stored before
 620          *
 621          * @param array $item
 622          * @return integer item id
 623          */
 624         private static function getDuplicateID(array $item)
 625         {
 626                 if (empty($item['network']) || in_array($item['network'], Protocol::FEDERATED)) {
 627                         $condition = ["`uri-id` = ? AND `uid` = ? AND `network` IN (?, ?, ?, ?)",
 628                                 $item['uri-id'], $item['uid'],
 629                                 Protocol::ACTIVITYPUB, Protocol::DIASPORA, Protocol::DFRN, Protocol::OSTATUS];
 630                         $existing = Post::selectFirst(['id', 'network'], $condition);
 631                         if (DBA::isResult($existing)) {
 632                                 // We only log the entries with a different user id than 0. Otherwise we would have too many false positives
 633                                 if ($item['uid'] != 0) {
 634                                         Logger::notice('Item already existed for user', [
 635                                                 'uri-id' => $item['uri-id'],
 636                                                 'uid' => $item['uid'],
 637                                                 'network' => $item['network'],
 638                                                 'existing_id' => $existing["id"],
 639                                                 'existing_network' => $existing["network"]
 640                                         ]);
 641                                 }
 642
 643                                 return $existing["id"];
 644                         }
 645                 }
 646                 return 0;
 647         }
 648
 649         /**
 650          * Fetch top-level parent data for the given item array
 651          *
 652          * @param array $item
 653          * @return array item array with parent data
 654          * @throws \Exception
 655          */
 656         private static function getTopLevelParent(array $item)
 657         {
 658                 $fields = ['uid', 'uri', 'parent-uri', 'id', 'deleted',
 659                         'uri-id', 'parent-uri-id',
 660                         'allow_cid', 'allow_gid', 'deny_cid', 'deny_gid',
 661                         'wall', 'private', 'forum_mode', 'origin', 'author-id'];
 662                 $condition = ['uri-id' => $item['thr-parent-id'], 'uid' => $item['uid']];
 663                 $params = ['order' => ['id' => false]];
 664                 $parent = Post::selectFirst($fields, $condition, $params);
 665
 666                 if (!DBA::isResult($parent)) {
 667                         Logger::notice('item parent was not found - ignoring item', ['thr-parent-id' => $item['thr-parent-id'], 'uid' => $item['uid']]);
 668                         return [];
 669                 }
 670
 671                 if ($parent['uri-id'] == $parent['parent-uri-id']) {
 672                         return $parent;
 673                 }
 674
 675                 $condition = ['uri-id' => $parent['parent-uri-id'],
 676                         'parent-uri-id' => $parent['parent-uri-id'],
 677                         'uid' => $parent['uid']];
 678                 $params = ['order' => ['id' => false]];
 679                 $toplevel_parent = Post::selectFirst($fields, $condition, $params);
 680                 if (!DBA::isResult($toplevel_parent)) {
 681                         Logger::notice('item top level parent was not found - ignoring item', ['parent-uri-id' => $parent['parent-uri-id'], 'uid' => $parent['uid']]);
 682                         return [];
 683                 }
 684
 685                 return $toplevel_parent;
 686         }
 687
 688         /**
 689          * Get the gravity for the given item array
 690          *
 691          * @param array $item
 692          * @return integer gravity
 693          */
 694         private static function getGravity(array $item)
 695         {
 696                 $activity = DI::activity();
 697
 698                 if (isset($item['gravity'])) {
 699                         return intval($item['gravity']);
 700                 } elseif ($item['parent-uri-id'] === $item['uri-id']) {
 701                         return GRAVITY_PARENT;
 702                 } elseif ($activity->match($item['verb'], Activity::POST)) {
 703                         return GRAVITY_COMMENT;
 704                 } elseif ($activity->match($item['verb'], Activity::FOLLOW)) {
 705                         return GRAVITY_ACTIVITY;
 706                 } elseif ($activity->match($item['verb'], Activity::ANNOUNCE)) {
 707                         return GRAVITY_ACTIVITY;
 708                 }
 709                 Logger::info('Unknown gravity for verb', ['verb' => $item['verb']]);
 710                 return GRAVITY_UNKNOWN;   // Should not happen
 711         }
 712
 713         public static function insert($item, $notify = false, $dontcache = false)
 714         {
 715                 $orig_item = $item;
 716
 717                 $priority = PRIORITY_HIGH;
 718
 719                 // If it is a posting where users should get notifications, then define it as wall posting
 720                 if ($notify) {
 721                         $item['wall'] = 1;
 722                         $item['origin'] = 1;
 723                         $item['network'] = Protocol::DFRN;
 724                         $item['protocol'] = Conversation::PARCEL_DIRECT;
 725                         $item['direction'] = Conversation::PUSH;
 726
 727                         if (in_array($notify, PRIORITIES)) {
 728                                 $priority = $notify;
 729                         }
 730                 } else {
 731                         $item['network'] = trim(($item['network'] ?? '') ?: Protocol::PHANTOM);
 732                 }
 733
 734                 $uid = intval($item['uid']);
 735
 736                 $item['guid'] = self::guid($item, $notify);
 737                 $item['uri'] = substr(trim($item['uri'] ?? '') ?: self::newURI($item['uid'], $item['guid']), 0, 255);
 738
 739                 // Store URI data
 740                 $item['uri-id'] = ItemURI::insert(['uri' => $item['uri'], 'guid' => $item['guid']]);
 741
 742                 // Backward compatibility: parent-uri used to be the direct parent uri.
 743                 // If it is provided without a thr-parent, it probably is the old behavior.
 744                 $item['thr-parent'] = trim($item['thr-parent'] ?? $item['parent-uri'] ?? $item['uri']);
 745                 $item['parent-uri'] = $item['thr-parent'];
 746
 747                 $item['thr-parent-id'] = $item['parent-uri-id'] = ItemURI::getIdByURI($item['thr-parent']);
 748
 749                 // Store conversation data
 750                 $item = Conversation::insert($item);
 751
 752                 /*
 753                  * Do we already have this item?
 754                  * We have to check several networks since Friendica posts could be repeated
 755                  * via OStatus (maybe Diasporsa as well)
 756                  */
 757                 $duplicate = self::getDuplicateID($item);
 758                 if ($duplicate) {
 759                         return $duplicate;
 760                 }
 761
 762                 // Additional duplicate checks
 763                 /// @todo Check why the first duplication check returns the item number and the second a 0
 764                 if (self::isDuplicate($item)) {
 765                         return 0;
 766                 }
 767
 768                 if (!isset($item['post-type'])) {
 769                         $item['post-type'] = empty($item['title']) ? self::PT_NOTE : self::PT_ARTICLE;
 770                 }
 771
 772                 $item['wall']          = intval($item['wall'] ?? 0);
 773                 $item['extid']         = trim($item['extid'] ?? '');
 774                 $item['author-name']   = trim($item['author-name'] ?? '');
 775                 $item['author-link']   = trim($item['author-link'] ?? '');
 776                 $item['author-avatar'] = trim($item['author-avatar'] ?? '');
 777                 $item['owner-name']    = trim($item['owner-name'] ?? '');
 778                 $item['owner-link']    = trim($item['owner-link'] ?? '');
 779                 $item['owner-avatar']  = trim($item['owner-avatar'] ?? '');
 780                 $item['received']      = (isset($item['received'])  ? DateTimeFormat::utc($item['received'])  : DateTimeFormat::utcNow());
 781                 $item['created']       = (isset($item['created'])   ? DateTimeFormat::utc($item['created'])   : $item['received']);
 782                 $item['edited']        = (isset($item['edited'])    ? DateTimeFormat::utc($item['edited'])    : $item['created']);
 783                 $item['changed']       = (isset($item['changed'])   ? DateTimeFormat::utc($item['changed'])   : $item['created']);
 784                 $item['commented']     = (isset($item['commented']) ? DateTimeFormat::utc($item['commented']) : $item['created']);
 785                 $item['title']         = substr(trim($item['title'] ?? ''), 0, 255);
 786                 $item['location']      = trim($item['location'] ?? '');
 787                 $item['coord']         = trim($item['coord'] ?? '');
 788                 $item['visible']       = (isset($item['visible']) ? intval($item['visible']) : 1);
 789                 $item['deleted']       = 0;
 790                 $item['verb']          = trim($item['verb'] ?? '');
 791                 $item['object-type']   = trim($item['object-type'] ?? '');
 792                 $item['object']        = trim($item['object'] ?? '');
 793                 $item['target-type']   = trim($item['target-type'] ?? '');
 794                 $item['target']        = trim($item['target'] ?? '');
 795                 $item['plink']         = substr(trim($item['plink'] ?? ''), 0, 255);
 796                 $item['allow_cid']     = trim($item['allow_cid'] ?? '');
 797                 $item['allow_gid']     = trim($item['allow_gid'] ?? '');
 798                 $item['deny_cid']      = trim($item['deny_cid'] ?? '');
 799                 $item['deny_gid']      = trim($item['deny_gid'] ?? '');
 800                 $item['private']       = intval($item['private'] ?? self::PUBLIC);
 801                 $item['body']          = trim($item['body'] ?? '');
 802                 $item['raw-body']      = trim($item['raw-body'] ?? $item['body']);
 803                 $item['app']           = trim($item['app'] ?? '');
 804                 $item['origin']        = intval($item['origin'] ?? 0);
 805                 $item['postopts']      = trim($item['postopts'] ?? '');
 806                 $item['resource-id']   = trim($item['resource-id'] ?? '');
 807                 $item['event-id']      = intval($item['event-id'] ?? 0);
 808                 $item['inform']        = trim($item['inform'] ?? '');
 809                 $item['file']          = trim($item['file'] ?? '');
 810
 811                 // Items cannot be stored before they happen ...
 812                 if ($item['created'] > DateTimeFormat::utcNow()) {
 813                         $item['created'] = DateTimeFormat::utcNow();
 814                 }
 815
 816                 // We haven't invented time travel by now.
 817                 if ($item['edited'] > DateTimeFormat::utcNow()) {
 818                         $item['edited'] = DateTimeFormat::utcNow();
 819                 }
 820
 821                 $item['plink'] = ($item['plink'] ?? '') ?: DI::baseUrl() . '/display/' . urlencode($item['guid']);
 822
 823                 $item['gravity'] = self::getGravity($item);
 824
 825                 $item['language'] = self::getLanguage($item);
 826
 827                 $default = ['url' => $item['author-link'], 'name' => $item['author-name'],
 828                         'photo' => $item['author-avatar'], 'network' => $item['network']];
 829                 $item['author-id'] = ($item['author-id'] ?? 0) ?: Contact::getIdForURL($item['author-link'], 0, null, $default);
 830
 831                 $default = ['url' => $item['owner-link'], 'name' => $item['owner-name'],
 832                         'photo' => $item['owner-avatar'], 'network' => $item['network']];
 833                 $item['owner-id'] = ($item['owner-id'] ?? 0) ?: Contact::getIdForURL($item['owner-link'], 0, null, $default);
 834
 835                 $actor = ($item['gravity'] == GRAVITY_PARENT) ? $item['owner-id'] : $item['author-id'];
 836                 if (!$item['origin'] && ($item['uid'] != 0) && Contact::isSharing($actor, $item['uid'])) {
 837                         $item['post-reason'] = self::PR_FOLLOWER;
 838                 }
 839
 840                 // Ensure that there is an avatar cache
 841                 Contact::checkAvatarCache($item['author-id']);
 842                 Contact::checkAvatarCache($item['owner-id']);
 843
 844                 // The contact-id should be set before "self::insert" was called - but there seems to be issues sometimes
 845                 $item["contact-id"] = self::contactId($item);
 846
 847                 if (!empty($item['direction']) && in_array($item['direction'], [Conversation::PUSH, Conversation::RELAY]) &&
 848                         self::isTooOld($item)) {
 849                         Logger::info('Item is too old', ['item' => $item]);
 850                         return 0;
 851                 }
 852
 853                 if (!self::isValid($item)) {
 854                         return 0;
 855                 }
 856
 857                 if ($item['gravity'] !== GRAVITY_PARENT) {
 858                         $toplevel_parent = self::getTopLevelParent($item);
 859                         if (empty($toplevel_parent)) {
 860                                 return 0;
 861                         }
 862
 863                         // If the thread originated from this node, we check the permission against the thread starter
 864                         $condition = ['uri-id' => $toplevel_parent['uri-id'], 'wall' => true];
 865                         $localTopLevelParent = Post::selectFirst(['uid'], $condition);
 866                         if (!empty($localTopLevelParent['uid']) && !self::isAllowedByUser($item, $localTopLevelParent['uid'])) {
 867                                 return 0;
 868                         }
 869
 870                         $parent_id             = $toplevel_parent['id'];
 871                         $item['parent-uri']    = $toplevel_parent['uri'];
 872                         $item['parent-uri-id'] = $toplevel_parent['uri-id'];
 873                         $item['deleted']       = $toplevel_parent['deleted'];
 874                         $item['allow_cid']     = $toplevel_parent['allow_cid'];
 875                         $item['allow_gid']     = $toplevel_parent['allow_gid'];
 876                         $item['deny_cid']      = $toplevel_parent['deny_cid'];
 877                         $item['deny_gid']      = $toplevel_parent['deny_gid'];
 878                         $parent_origin         = $toplevel_parent['origin'];
 879
 880                         // Don't federate received participation messages
 881                         if ($item['verb'] != Activity::FOLLOW) {
 882                                 $item['wall'] = $toplevel_parent['wall'];
 883                         } else {
 884                                 $item['wall'] = false;
 885                                 // Participations are technical messages, so they are set to "seen" automatically
 886                                 $item['unseen'] = false;
 887                         }
 888
 889                         /*
 890                          * If the parent is private, force privacy for the entire conversation
 891                          * This differs from the above settings as it subtly allows comments from
 892                          * email correspondents to be private even if the overall thread is not.
 893                          */
 894                         if ($toplevel_parent['private']) {
 895                                 $item['private'] = $toplevel_parent['private'];
 896                         }
 897
 898                         /*
 899                          * Edge case. We host a public forum that was originally posted to privately.
 900                          * The original author commented, but as this is a comment, the permissions
 901                          * weren't fixed up so it will still show the comment as private unless we fix it here.
 902                          */
 903                         if ((intval($toplevel_parent['forum_mode']) == 1) && ($toplevel_parent['private'] != self::PUBLIC)) {
 904                                 $item['private'] = self::PUBLIC;
 905                         }
 906
 907                         // If its a post that originated here then tag the thread as "mention"
 908                         if ($item['origin'] && $item['uid']) {
 909                                 DBA::update('post-thread-user', ['mention' => true], ['uri-id' => $item['parent-uri-id'], 'uid' => $item['uid']]);
 910                                 Logger::info('tagged thread as mention', ['parent' => $parent_id, 'parent-uri-id' => $item['parent-uri-id'], 'uid' => $item['uid']]);
 911                         }
 912
 913                         // Update the contact relations
 914                         Contact\Relation::store($toplevel_parent['author-id'], $item['author-id'], $item['created']);
 915                 } else {
 916                         $parent_id = 0;
 917                         $parent_origin = $item['origin'];
 918                 }
 919
 920                 $item['parent-uri-id'] = ItemURI::getIdByURI($item['parent-uri']);
 921                 $item['thr-parent-id'] = ItemURI::getIdByURI($item['thr-parent']);
 922
 923                 // Is this item available in the global items (with uid=0)?
 924                 if ($item["uid"] == 0) {
 925                         $item["global"] = true;
 926
 927                         // Set the global flag on all items if this was a global item entry
 928                         Post::update(['global' => true], ['uri-id' => $item['uri-id']]);
 929                 } else {
 930                         $item['global'] = Post::exists(['uid' => 0, 'uri-id' => $item['uri-id']]);
 931                 }
 932
 933                 // ACL settings
 934                 if (!empty($item["allow_cid"] . $item["allow_gid"] . $item["deny_cid"] . $item["deny_gid"])) {
 935                         $item["private"] = self::PRIVATE;
 936                 }
 937
 938                 if ($notify) {
 939                         $item['edit'] = false;
 940                         $item['parent'] = $parent_id;
 941
 942                         // Trigger automatic reactions for addons
 943                         $item['api_source'] = true;
 944
 945                         // We have to tell the hooks who we are - this really should be improved
 946                         if (!local_user()) {
 947                                 $_SESSION['authenticated'] = true;
 948                                 $_SESSION['uid'] = $uid;
 949                                 $dummy_session = true;
 950                         } else {
 951                                 $dummy_session = false;
 952                         }
 953
 954                         Hook::callAll('post_local', $item);
 955
 956                         if ($dummy_session) {
 957                                 unset($_SESSION['authenticated']);
 958                                 unset($_SESSION['uid']);
 959                         }
 960                 } else {
 961                         Hook::callAll('post_remote', $item);
 962                 }
 963
 964                 if (!empty($item['cancel'])) {
 965                         Logger::log('post cancelled by addon.');
 966                         return 0;
 967                 }
 968
 969                 if (empty($item['vid']) && !empty($item['verb'])) {
 970                         $item['vid'] = Verb::getID($item['verb']);
 971                 }
 972
 973                 // Creates or assigns the permission set
 974                 $item['psid'] = PermissionSet::getIdFromACL(
 975                         $item['uid'],
 976                         $item['allow_cid'],
 977                         $item['allow_gid'],
 978                         $item['deny_cid'],
 979                         $item['deny_gid']
 980                 );
 981
 982                 if (!empty($item['extid'])) {
 983                         $item['external-id'] = ItemURI::getIdByURI($item['extid']);
 984                 }
 985
 986                 if ($item['verb'] == Activity::ANNOUNCE) {
 987                         self::setOwnerforResharedItem($item);
 988                 }
 989
 990                 if (isset($item['attachments'])) {
 991                         foreach ($item['attachments'] as $attachment) {
 992                                 $attachment['uri-id'] = $item['uri-id'];
 993                                 Post\Media::insert($attachment);
 994                         }
 995                         unset($item['attachments']);
 996                 }
 997
 998                 Post\Media::insertFromAttachmentData($item['uri-id'], $item['body']);
 999
1000                 // Remove all media attachments from the body and store them in the post-media table
1001                 $item['raw-body'] = Post\Media::insertFromBody($item['uri-id'], $item['raw-body']);
1002                 $item['raw-body'] = self::setHashtags($item['raw-body']);
1003
1004                 if (!DBA::exists('contact', ['id' => $item['author-id'], 'network' => Protocol::DFRN])) {
1005                         Post\Media::insertFromRelevantUrl($item['uri-id'], $item['raw-body']);
1006                 }
1007
1008                 // Check for hashtags in the body and repair or add hashtag links
1009                 $item['body'] = self::setHashtags($item['body']);
1010
1011                 if (stristr($item['verb'], Activity::POKE)) {
1012                         $notify_type = Delivery::POKE;
1013                 } else {
1014                         $notify_type = Delivery::POST;
1015                 }
1016
1017                 // Filling item related side tables
1018                 if (!empty($item['attach'])) {
1019                         Post\Media::insertFromAttachment($item['uri-id'], $item['attach']);
1020                 }
1021
1022                 if (empty($item['event-id'])) {
1023                         unset($item['event-id']);
1024
1025                         $ev = Event::fromBBCode($item['body']);
1026                         if ((!empty($ev['desc']) || !empty($ev['summary'])) && !empty($ev['start'])) {
1027                                 Logger::info('Event found.');
1028                                 $ev['cid']       = $item['contact-id'];
1029                                 $ev['uid']       = $item['uid'];
1030                                 $ev['uri']       = $item['uri'];
1031                                 $ev['edited']    = $item['edited'];
1032                                 $ev['private']   = $item['private'];
1033                                 $ev['guid']      = $item['guid'];
1034                                 $ev['plink']     = $item['plink'];
1035                                 $ev['network']   = $item['network'];
1036                                 $ev['protocol']  = $item['protocol'] ?? Conversation::PARCEL_UNKNOWN;
1037                                 $ev['direction'] = $item['direction'] ?? Conversation::UNKNOWN;
1038                                 $ev['source']    = $item['source'] ?? '';
1039
1040                                 $event = DBA::selectFirst('event', ['id'], ['uri' => $item['uri'], 'uid' => $item['uid']]);
1041                                 if (DBA::isResult($event)) {
1042                                         $ev['id'] = $event['id'];
1043                                 }
1044
1045                                 $event_id = Event::store($ev);
1046                                 $item = Event::getItemArrayForId($event_id, $item);
1047
1048                                 Logger::info('Event was stored', ['id' => $event_id]);
1049                         }
1050                 }
1051
1052                 if (empty($item['causer-id'])) {
1053                         unset($item['causer-id']);
1054                 }
1055
1056                 Post::insert($item['uri-id'], $item);
1057
1058                 if ($item['gravity'] == GRAVITY_PARENT) {
1059                         Post\Thread::insert($item['uri-id'], $item);
1060                 }
1061
1062                 if (!in_array($item['verb'], self::ACTIVITIES)) {
1063                         Post\Content::insert($item['uri-id'], $item);
1064                 }
1065
1066                 // Create Diaspora signature
1067                 if ($item['origin'] && empty($item['diaspora_signed_text']) && ($item['gravity'] != GRAVITY_PARENT)) {
1068                         $signed = Diaspora::createCommentSignature($uid, $item);
1069                         if (!empty($signed)) {
1070                                 $item['diaspora_signed_text'] = json_encode($signed);
1071                         }
1072                 }
1073
1074                 if (!empty($item['diaspora_signed_text'])) {
1075                         DBA::replace('diaspora-interaction', ['uri-id' => $item['uri-id'], 'interaction' => $item['diaspora_signed_text']]);
1076                 }
1077
1078                 // Attached file links
1079                 if (!empty($item['file'])) {
1080                         Post\Category::storeTextByURIId($item['uri-id'], $item['uid'], $item['file']);
1081                 }
1082
1083                 // Delivery relevant data
1084                 $delivery_data = Post\DeliveryData::extractFields($item);
1085
1086                 if (!empty($item['origin']) || !empty($item['wall']) || !empty($delivery_data['postopts']) || !empty($delivery_data['inform'])) {
1087                         Post\DeliveryData::insert($item['uri-id'], $delivery_data);
1088                 }
1089
1090                 // Store tags from the body if this hadn't been handled previously in the protocol classes
1091                 if (!Tag::existsForPost($item['uri-id'])) {
1092                         Tag::storeFromBody($item['uri-id'], $item['body']);
1093                 }
1094
1095                 $condition = ['uri-id' => $item['uri-id'], 'uid' => $item['uid']];
1096                 if (Post::exists($condition)) {
1097                         Logger::notice('Item is already inserted - aborting', $condition);
1098                         return 0;
1099                 }
1100
1101                 $post_user_id = Post\User::insert($item['uri-id'], $item['uid'], $item);
1102                 if (!$post_user_id) {
1103                         Logger::notice('Post-User is already inserted - aborting', ['uid' => $item['uid'], 'uri-id' => $item['uri-id']]);
1104                         return 0;
1105                 }
1106
1107                 if ($item['gravity'] == GRAVITY_PARENT) {
1108                         $item['post-user-id'] = $post_user_id;
1109                         Post\ThreadUser::insert($item['uri-id'], $item['uid'], $item);
1110                 }
1111
1112                 Logger::notice('created item', ['post-id' => $post_user_id, 'uid' => $item['uid'], 'network' => $item['network'], 'uri-id' => $item['uri-id'], 'guid' => $item['guid']]);
1113
1114                 $posted_item = Post::selectFirst(self::ITEM_FIELDLIST, ['post-user-id' => $post_user_id]);
1115                 if (!DBA::isResult($posted_item)) {
1116                         // On failure store the data into a spool file so that the "SpoolPost" worker can try again later.
1117                         Logger::warning('Could not store item. it will be spooled', ['id' => $post_user_id]);
1118                         self::spool($orig_item);
1119                         return 0;
1120                 }
1121
1122                 // update the commented timestamp on the parent
1123                 if (DI::config()->get('system', 'like_no_comment')) {
1124                         // Update when it is a comment
1125                         $update_commented = in_array($posted_item['gravity'], [GRAVITY_PARENT, GRAVITY_COMMENT]);
1126                 } else {
1127                         // Update when it isn't a follow or tag verb
1128                         $update_commented = !in_array($posted_item['verb'], [Activity::FOLLOW, Activity::TAG]);
1129                 }
1130
1131                 if ($update_commented) {
1132                         $fields = ['commented' => DateTimeFormat::utcNow(), 'changed' => DateTimeFormat::utcNow()];
1133                 } else {
1134                         $fields = ['changed' => DateTimeFormat::utcNow()];
1135                 }
1136
1137                 Post::update($fields, ['uri-id' => $posted_item['parent-uri-id'], 'uid' => $posted_item['uid']]);
1138
1139                 // In that function we check if this is a forum post. Additionally we delete the item under certain circumstances
1140                 if (self::tagDeliver($posted_item['uid'], $post_user_id)) {
1141                         // Get the user information for the logging
1142                         $user = User::getById($uid);
1143
1144                         Logger::notice('Item had been deleted', ['id' => $post_user_id, 'user' => $uid, 'account-type' => $user['account-type']]);
1145                         return 0;
1146                 }
1147
1148                 if (!$dontcache) {
1149                         if ($notify) {
1150                                 Hook::callAll('post_local_end', $posted_item);
1151                         } else {
1152                                 Hook::callAll('post_remote_end', $posted_item);
1153                         }
1154                 }
1155
1156                 if ($posted_item['gravity'] === GRAVITY_PARENT) {
1157                         self::addShadow($post_user_id);
1158                 } else {
1159                         self::addShadowPost($post_user_id);
1160                 }
1161
1162                 self::updateContact($posted_item);
1163
1164                 Post\UserNotification::setNotification($posted_item['uri-id'], $posted_item['uid']);
1165
1166                 check_user_notification($posted_item['uri-id'], $posted_item['uid']);
1167
1168                 // Distribute items to users who subscribed to their tags
1169                 self::distributeByTags($posted_item);
1170
1171                 // Automatically reshare the item if the "remote_self" option is selected
1172                 self::autoReshare($posted_item);
1173
1174                 $transmit = $notify || ($posted_item['visible'] && ($parent_origin || $posted_item['origin']));
1175
1176                 if ($transmit) {
1177                         // Don't relay participation messages
1178                         if (($posted_item['verb'] == Activity::FOLLOW) &&
1179                                 (!$posted_item['origin'] || ($posted_item['author-id'] != Contact::getPublicIdByUserId($uid)))) {
1180                                 Logger::info('Participation messages will not be relayed', ['item' => $posted_item['id'], 'uri' => $posted_item['uri'], 'verb' => $posted_item['verb']]);
1181                                 $transmit = false;
1182                         }
1183                 }
1184
1185                 if ($transmit) {
1186                         Worker::add(['priority' => $priority, 'dont_fork' => true], 'Notifier', $notify_type, (int)$posted_item['uri-id'], (int)$posted_item['uid']);
1187                 }
1188
1189                 return $post_user_id;
1190         }
1191
1192         /**
1193          * Change the owner of a parent item if it had been shared by a forum
1194          *
1195          * (public) forum posts in the new format consist of the regular post by the author
1196          * followed by an announce message sent from the forum account.
1197          * Changing the owner helps in grouping forum posts.
1198          *
1199          * @param array $item
1200          * @return void
1201          */
1202         private static function setOwnerforResharedItem(array $item)
1203         {
1204                 $parent = Post::selectFirst(['id', 'causer-id', 'owner-id', 'author-id', 'author-link', 'origin', 'post-reason'],
1205                         ['uri-id' => $item['thr-parent-id'], 'uid' => $item['uid']]);
1206                 if (!DBA::isResult($parent)) {
1207                         Logger::error('Parent not found', ['uri-id' => $item['thr-parent-id'], 'uid' => $item['uid']]);
1208                         return;
1209                 }
1210
1211                 $author = Contact::selectFirst(['url', 'contact-type', 'network'], ['id' => $item['author-id']]);
1212                 if (!DBA::isResult($author)) {
1213                         Logger::error('Author not found', ['id' => $item['author-id']]);
1214                         return;
1215                 }
1216
1217                 $cid = Contact::getIdForURL($author['url'], $item['uid']);
1218                 if (empty($cid) || !Contact::isSharing($cid, $item['uid'])) {
1219                         Logger::info('The resharer is not a following contact: quit', ['resharer' => $author['url'], 'uid' => $item['uid'], 'cid' => $cid]);
1220                         return;
1221                 }
1222
1223                 if ($author['contact-type'] != Contact::TYPE_COMMUNITY) {
1224                         if ($parent['post-reason'] == self::PR_ANNOUNCEMENT) {
1225                                 Logger::info('The parent is already marked as announced: quit', ['causer' => $parent['causer-id'], 'owner' => $parent['owner-id'], 'author' => $parent['author-id'], 'uid' => $item['uid']]);
1226                                 return;
1227                         }
1228
1229                         if (Contact::isSharing($parent['owner-id'], $item['uid'])) {
1230                                 Logger::info('The resharer is no forum: quit', ['resharer' => $item['author-id'], 'owner' => $parent['owner-id'], 'author' => $parent['author-id'], 'uid' => $item['uid']]);
1231                                 return;
1232                         }
1233                 }
1234
1235                 self::update(['post-reason' => self::PR_ANNOUNCEMENT, 'causer-id' => $item['author-id']], ['id' => $parent['id']]);
1236                 Logger::info('Set announcement post-reason', ['uri-id' => $item['uri-id'], 'thr-parent-id' => $item['thr-parent-id'], 'uid' => $item['uid']]);
1237         }
1238
1239         /**
1240          * Distribute the given item to users who subscribed to their tags
1241          *
1242          * @param array $item     Processed item
1243          */
1244         private static function distributeByTags(array $item)
1245         {
1246                 if (($item['uid'] != 0) || ($item['gravity'] != GRAVITY_PARENT) || !in_array($item['network'], Protocol::FEDERATED)) {
1247                         return;
1248                 }
1249
1250                 $uids = Tag::getUIDListByURIId($item['uri-id']);
1251                 foreach ($uids as $uid) {
1252                         if (Contact::isSharing($item['author-id'], $uid)) {
1253                                 $fields = [];
1254                         } else {
1255                                 $fields = ['post-reason' => self::PR_TAG];
1256                         }
1257
1258                         $stored = self::storeForUserByUriId($item['uri-id'], $uid, $fields);
1259                         Logger::info('Stored item for users', ['uri-id' => $item['uri-id'], 'uid' => $uid, 'fields' => $fields, 'stored' => $stored]);
1260                 }
1261         }
1262
1263         /**
1264          * Distributes public items to the receivers
1265          *
1266          * @param integer $itemid      Item ID that should be added
1267          * @param string  $signed_text Original text (for Diaspora signatures), JSON encoded.
1268          * @throws \Exception
1269          */
1270         public static function distribute($itemid, $signed_text = '')
1271         {
1272                 $condition = ["`id` IN (SELECT `parent` FROM `post-user-view` WHERE `id` = ?)", $itemid];
1273                 $parent = Post::selectFirst(['owner-id'], $condition);
1274                 if (!DBA::isResult($parent)) {
1275                         Logger::warning('Item not found', ['condition' => $condition]);
1276                         return;
1277                 }
1278
1279                 // Only distribute public items from native networks
1280                 $condition = ['id' => $itemid, 'uid' => 0,
1281                         'network' => array_merge(Protocol::FEDERATED ,['']),
1282                         'visible' => true, 'deleted' => false, 'private' => [self::PUBLIC, self::UNLISTED]];
1283                 $item = Post::selectFirst(self::ITEM_FIELDLIST, $condition);
1284                 if (!DBA::isResult($item)) {
1285                         Logger::warning('Item not found', ['condition' => $condition]);
1286                         return;
1287                 }
1288
1289                 $origin = $item['origin'];
1290
1291                 $users = [];
1292
1293                 /// @todo add a field "pcid" in the contact table that referrs to the public contact id.
1294                 $owner = DBA::selectFirst('contact', ['url', 'nurl', 'alias'], ['id' => $parent['owner-id']]);
1295                 if (!DBA::isResult($owner)) {
1296                         return;
1297                 }
1298
1299                 $condition = ['nurl' => $owner['nurl'], 'rel' => [Contact::SHARING, Contact::FRIEND]];
1300                 $contacts = DBA::select('contact', ['uid'], $condition);
1301                 while ($contact = DBA::fetch($contacts)) {
1302                         if ($contact['uid'] == 0) {
1303                                 continue;
1304                         }
1305
1306                         $users[$contact['uid']] = $contact['uid'];
1307                 }
1308                 DBA::close($contacts);
1309
1310                 $condition = ['alias' => $owner['url'], 'rel' => [Contact::SHARING, Contact::FRIEND]];
1311                 $contacts = DBA::select('contact', ['uid'], $condition);
1312                 while ($contact = DBA::fetch($contacts)) {
1313                         if ($contact['uid'] == 0) {
1314                                 continue;
1315                         }
1316
1317                         $users[$contact['uid']] = $contact['uid'];
1318                 }
1319                 DBA::close($contacts);
1320
1321                 if (!empty($owner['alias'])) {
1322                         $condition = ['nurl' => Strings::normaliseLink($owner['alias']), 'rel' => [Contact::SHARING, Contact::FRIEND]];
1323                         $contacts = DBA::select('contact', ['uid'], $condition);
1324                         while ($contact = DBA::fetch($contacts)) {
1325                                 if ($contact['uid'] == 0) {
1326                                         continue;
1327                                 }
1328
1329                                 $users[$contact['uid']] = $contact['uid'];
1330                         }
1331                         DBA::close($contacts);
1332                 }
1333
1334                 $origin_uid = 0;
1335
1336                 if ($item['uri-id'] != $item['parent-uri-id']) {
1337                         $parents = Post::select(['uid', 'origin'], ["`uri-id` = ? AND `uid` != 0", $item['parent-uri-id']]);
1338                         while ($parent = Post::fetch($parents)) {
1339                                 $users[$parent['uid']] = $parent['uid'];
1340                                 if ($parent['origin'] && !$origin) {
1341                                         $origin_uid = $parent['uid'];
1342                                 }
1343                         }
1344                         DBA::close($parents);
1345                 }
1346
1347                 foreach ($users as $uid) {
1348                         if ($origin_uid == $uid) {
1349                                 $item['diaspora_signed_text'] = $signed_text;
1350                         }
1351                         self::storeForUser($item, $uid);
1352                 }
1353         }
1354
1355         /**
1356          * Store a public item defined by their URI-ID for the given users
1357          *
1358          * @param integer $uri_id     URI-ID of the given item
1359          * @param integer $uid        The user that will receive the item entry
1360          * @param array   $fields     Additional fields to be stored
1361          * @param integer $source_uid User id of the source post
1362          * @return integer stored item id
1363          */
1364         public static function storeForUserByUriId(int $uri_id, int $uid, array $fields = [], int $source_uid = 0)
1365         {
1366                 if ($uid == $source_uid) {
1367                         Logger::warning('target UID must not be be equal to the source UID', ['uri-id' => $uri_id, 'uid' => $uid]);
1368                         return 0;
1369                 }
1370
1371                 $item = Post::selectFirst(self::ITEM_FIELDLIST, ['uri-id' => $uri_id, 'uid' => $source_uid]);
1372                 if (!DBA::isResult($item)) {
1373                         Logger::warning('Item could not be fetched', ['uri-id' => $uri_id, 'uid' => $source_uid]);
1374                         return 0;
1375                 }
1376
1377                 if (($source_uid == 0) && (($item['private'] == self::PRIVATE) || !in_array($item['network'], Protocol::FEDERATED))) {
1378                         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']]);
1379                         return 0;
1380                 }
1381
1382                 $item['post-reason'] = self::PR_STORED;
1383
1384                 $item = array_merge($item, $fields);
1385
1386                 $is_reshare = ($item['gravity'] == GRAVITY_ACTIVITY) && ($item['verb'] == Activity::ANNOUNCE);
1387
1388                 if ((($item['gravity'] == GRAVITY_PARENT) || $is_reshare) &&
1389                         DI::pConfig()->get($uid, 'system', 'accept_only_sharer') &&
1390                         !Contact::isSharingByURL($item['author-link'], $uid) &&
1391                         !Contact::isSharingByURL($item['owner-link'], $uid)) {
1392                         Logger::info('Contact is not a follower, thread will not be stored', ['author' => $item['author-link'], 'uid' => $uid]);
1393                         return 0;
1394                 }
1395
1396                 if ((($item['gravity'] == GRAVITY_COMMENT) || $is_reshare) && !Post::exists(['uri-id' => $item['thr-parent-id'], 'uid' => $uid])) {
1397                         // Only do an auto complete with the source uid "0" to prevent privavy problems
1398                         $causer = $item['causer-id'] ?: $item['author-id'];
1399                         $result = self::storeForUserByUriId($item['thr-parent-id'], $uid, ['causer-id' => $causer, 'post-reason' => self::PR_FETCHED]);
1400                         Logger::info('Fetched thread parent', ['uri-id' => $item['thr-parent-id'], 'uid' => $uid, 'causer' => $causer, 'result' => $result]);
1401                 }
1402
1403                 $stored = self::storeForUser($item, $uid);
1404                 Logger::info('Item stored for user', ['uri-id' => $item['uri-id'], 'uid' => $uid, 'source-uid' => $source_uid, 'stored' => $stored]);
1405                 return $stored;
1406         }
1407
1408         /**
1409          * Store a public item array for the given users
1410          *
1411          * @param array   $item   The item entry that will be stored
1412          * @param integer $uid    The user that will receive the item entry
1413          * @return integer stored item id
1414          * @throws \Exception
1415          */
1416         private static function storeForUser(array $item, int $uid)
1417         {
1418                 if (Post::exists(['uri-id' => $item['uri-id'], 'uid' => $uid])) {
1419                         Logger::info('Item already exists', ['uri-id' => $item['uri-id'], 'uid' => $uid]);
1420                         return 0;
1421                 }
1422
1423                 unset($item['id']);
1424                 unset($item['mention']);
1425                 unset($item['starred']);
1426                 unset($item['unseen']);
1427                 unset($item['psid']);
1428                 unset($item['pinned']);
1429                 unset($item['ignored']);
1430                 unset($item['pubmail']);
1431                 unset($item['forum_mode']);
1432
1433                 unset($item['event-id']);
1434                 unset($item['hidden']);
1435                 unset($item['notification-type']);
1436
1437                 $item['uid'] = $uid;
1438                 $item['origin'] = 0;
1439                 $item['wall'] = 0;
1440
1441                 if ($item['gravity'] == GRAVITY_PARENT) {
1442                         $contact = Contact::getByURLForUser($item['owner-link'], $uid, false, ['id']);
1443                 } else {
1444                         $contact = Contact::getByURLForUser($item['author-link'], $uid, false, ['id']);
1445                 }
1446
1447                 if (!empty($contact['id'])) {
1448                         $item['contact-id'] = $contact['id'];
1449                 } else {
1450                         // Shouldn't happen at all
1451                         Logger::warning('contact-id could not be fetched', ['uid' => $uid, 'item' => $item]);
1452                         $self = DBA::selectFirst('contact', ['id'], ['self' => true, 'uid' => $uid]);
1453                         if (!DBA::isResult($self)) {
1454                                 // Shouldn't happen even less
1455                                 Logger::warning('self contact could not be fetched', ['uid' => $uid, 'item' => $item]);
1456                                 return 0;
1457                         }
1458                         $item['contact-id'] = $self['id'];
1459                 }
1460
1461                 $notify = false;
1462                 if ($item['gravity'] == GRAVITY_PARENT) {
1463                         $contact = DBA::selectFirst('contact', [], ['id' => $item['contact-id'], 'self' => false]);
1464                         if (DBA::isResult($contact)) {
1465                                 $notify = self::isRemoteSelf($contact, $item);
1466                         }
1467                 }
1468
1469                 $distributed = self::insert($item, $notify, true);
1470
1471                 if (!$distributed) {
1472                         Logger::info("Distributed item wasn't stored", ['uri-id' => $item['uri-id'], 'user' => $uid]);
1473                 } else {
1474                         Logger::info('Distributed item was stored', ['uri-id' => $item['uri-id'], 'user' => $uid, 'stored' => $distributed]);
1475                 }
1476                 return $distributed;
1477         }
1478
1479         /**
1480          * Add a shadow entry for a given item id that is a thread starter
1481          *
1482          * We store every public item entry additionally with the user id "0".
1483          * This is used for the community page and for the search.
1484          * It is planned that in the future we will store public item entries only once.
1485          *
1486          * @param integer $itemid Item ID that should be added
1487          * @throws \Exception
1488          */
1489         private static function addShadow($itemid)
1490         {
1491                 $fields = ['uid', 'private', 'visible', 'deleted', 'network', 'uri-id'];
1492                 $condition = ['id' => $itemid, 'gravity' => GRAVITY_PARENT];
1493                 $item = Post::selectFirst($fields, $condition);
1494
1495                 if (!DBA::isResult($item)) {
1496                         return;
1497                 }
1498
1499                 // is it already a copy?
1500                 if (($itemid == 0) || ($item['uid'] == 0)) {
1501                         return;
1502                 }
1503
1504                 // Is it a visible public post?
1505                 if (!$item["visible"] || $item["deleted"]  || ($item["private"] == self::PRIVATE)) {
1506                         return;
1507                 }
1508
1509                 // is it an entry from a connector? Only add an entry for natively connected networks
1510                 if (!in_array($item["network"], array_merge(Protocol::FEDERATED ,['']))) {
1511                         return;
1512                 }
1513
1514                 if (Post::exists(['uri-id' => $item['uri-id'], 'uid' => 0])) {
1515                         return;
1516                 }
1517
1518                 $item = Post::selectFirst(self::ITEM_FIELDLIST, ['id' => $itemid]);
1519
1520                 if (DBA::isResult($item)) {
1521                         // Preparing public shadow (removing user specific data)
1522                         $item['uid'] = 0;
1523                         unset($item['id']);
1524                         unset($item['parent']);
1525                         unset($item['wall']);
1526                         unset($item['mention']);
1527                         unset($item['origin']);
1528                         unset($item['starred']);
1529                         unset($item['postopts']);
1530                         unset($item['inform']);
1531                         unset($item['post-reason']);
1532                         if ($item['uri-id'] == $item['parent-uri-id']) {
1533                                 $item['contact-id'] = $item['owner-id'];
1534                         } else {
1535                                 $item['contact-id'] = $item['author-id'];
1536                         }
1537
1538                         $public_shadow = self::insert($item, false, true);
1539
1540                         Logger::info('Stored public shadow', ['thread' => $itemid, 'id' => $public_shadow]);
1541                 }
1542         }
1543
1544         /**
1545          * Add a shadow entry for a given item id that is a comment
1546          *
1547          * This function does the same like the function above - but for comments
1548          *
1549          * @param integer $itemid Item ID that should be added
1550          * @throws \Exception
1551          */
1552         private static function addShadowPost($itemid)
1553         {
1554                 $item = Post::selectFirst(self::ITEM_FIELDLIST, ['id' => $itemid]);
1555                 if (!DBA::isResult($item)) {
1556                         return;
1557                 }
1558
1559                 // Is it a toplevel post?
1560                 if ($item['gravity'] == GRAVITY_PARENT) {
1561                         self::addShadow($itemid);
1562                         return;
1563                 }
1564
1565                 // Is this a shadow entry?
1566                 if ($item['uid'] == 0) {
1567                         return;
1568                 }
1569
1570                 // Is there a shadow parent?
1571                 if (!Post::exists(['uri-id' => $item['parent-uri-id'], 'uid' => 0])) {
1572                         return;
1573                 }
1574
1575                 // Is there already a shadow entry?
1576                 if (Post::exists(['uri-id' => $item['uri-id'], 'uid' => 0])) {
1577                         return;
1578                 }
1579
1580                 // Save "origin" and "parent" state
1581                 $origin = $item['origin'];
1582                 $parent = $item['parent'];
1583
1584                 // Preparing public shadow (removing user specific data)
1585                 $item['uid'] = 0;
1586                 unset($item['id']);
1587                 unset($item['parent']);
1588                 unset($item['wall']);
1589                 unset($item['mention']);
1590                 unset($item['origin']);
1591                 unset($item['starred']);
1592                 unset($item['postopts']);
1593                 unset($item['inform']);
1594                 unset($item['post-reason']);
1595                 $item['contact-id'] = Contact::getIdForURL($item['author-link']);
1596
1597                 $public_shadow = self::insert($item, false, true);
1598
1599                 Logger::info('Stored public shadow', ['uri-id' => $item['uri-id'], 'id' => $public_shadow]);
1600
1601                 // If this was a comment to a Diaspora post we don't get our comment back.
1602                 // This means that we have to distribute the comment by ourselves.
1603                 if ($origin && Post::exists(['id' => $parent, 'network' => Protocol::DIASPORA])) {
1604                         self::distribute($public_shadow);
1605                 }
1606         }
1607
1608         /**
1609          * Adds a language specification in a "language" element of given $arr.
1610          * Expects "body" element to exist in $arr.
1611          *
1612          * @param array $item
1613          * @return string detected language
1614          * @throws \Text_LanguageDetect_Exception
1615          */
1616         private static function getLanguage(array $item)
1617         {
1618                 if (!empty($item['language'])) {
1619                         return $item['language'];
1620                 }
1621
1622                 if (!in_array($item['gravity'], [GRAVITY_PARENT, GRAVITY_COMMENT]) || empty($item['body'])) {
1623                         return '';
1624                 }
1625
1626                 // Convert attachments to links
1627                 $naked_body = BBCode::removeAttachment($item['body']);
1628                 if (empty($naked_body)) {
1629                         return '';
1630                 }
1631
1632                 // Remove links and pictures
1633                 $naked_body = BBCode::removeLinks($naked_body);
1634
1635                 // Convert the title and the body to plain text
1636                 $naked_body = trim($item['title'] . "\n" . BBCode::toPlaintext($naked_body));
1637
1638                 // Remove possibly remaining links
1639                 $naked_body = preg_replace(Strings::autoLinkRegEx(), '', $naked_body);
1640
1641                 if (empty($naked_body)) {
1642                         return '';
1643                 }
1644
1645                 $availableLanguages = DI::l10n()->getAvailableLanguages();
1646                 // See https://github.com/friendica/friendica/issues/10511
1647                 // Persian is manually added to language detection until a persian translation is provided for the interface, at
1648                 // which point it will be automatically available through `getAvailableLanguages()` and this should be removed.
1649                 $availableLanguages['fa'] = 'fa';
1650
1651                 $ld = new Language($availableLanguages);
1652                 $languages = $ld->detect($naked_body)->limit(0, 3)->close();
1653                 if (is_array($languages)) {
1654                         return json_encode($languages);
1655                 }
1656
1657                 return '';
1658         }
1659
1660         public static function getLanguageMessage(array $item)
1661         {
1662                 $iso639 = new \Matriphe\ISO639\ISO639;
1663
1664                 $used_languages = '';
1665                 foreach (json_decode($item['language'], true) as $language => $reliability) {
1666                         $used_languages .= $iso639->languageByCode1($language) . ' (' . $language . "): " . number_format($reliability, 5) . '\n';
1667                 }
1668                 $used_languages = DI::l10n()->t('Detected languages in this post:\n%s', $used_languages);
1669                 return $used_languages;
1670         }
1671
1672         /**
1673          * Creates an unique guid out of a given uri
1674          *
1675          * @param string $uri uri of an item entry
1676          * @param string $host hostname for the GUID prefix
1677          * @return string unique guid
1678          */
1679         public static function guidFromUri($uri, $host)
1680         {
1681                 // Our regular guid routine is using this kind of prefix as well
1682                 // We have to avoid that different routines could accidentally create the same value
1683                 $parsed = parse_url($uri);
1684
1685                 // We use a hash of the hostname as prefix for the guid
1686                 $guid_prefix = hash("crc32", $host);
1687
1688                 // Remove the scheme to make sure that "https" and "http" doesn't make a difference
1689                 unset($parsed["scheme"]);
1690
1691                 // Glue it together to be able to make a hash from it
1692                 $host_id = implode("/", $parsed);
1693
1694                 // We could use any hash algorithm since it isn't a security issue
1695                 $host_hash = hash("ripemd128", $host_id);
1696
1697                 return $guid_prefix.$host_hash;
1698         }
1699
1700         /**
1701          * generate an unique URI
1702          *
1703          * @param integer $uid  User id
1704          * @param string  $guid An existing GUID (Otherwise it will be generated)
1705          *
1706          * @return string
1707          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1708          */
1709         public static function newURI($uid, $guid = "")
1710         {
1711                 if ($guid == "") {
1712                         $guid = System::createUUID();
1713                 }
1714
1715                 return DI::baseUrl()->get() . '/objects/' . $guid;
1716         }
1717
1718         /**
1719          * Set "success_update" and "last-item" to the date of the last time we heard from this contact
1720          *
1721          * This can be used to filter for inactive contacts.
1722          * Only do this for public postings to avoid privacy problems, since poco data is public.
1723          * Don't set this value if it isn't from the owner (could be an author that we don't know)
1724          *
1725          * @param array $arr Contains the just posted item record
1726          * @throws \Exception
1727          */
1728         private static function updateContact($arr)
1729         {
1730                 // Unarchive the author
1731                 $contact = DBA::selectFirst('contact', [], ['id' => $arr["author-id"]]);
1732                 if (DBA::isResult($contact)) {
1733                         Contact::unmarkForArchival($contact);
1734                 }
1735
1736                 // Unarchive the contact if it's not our own contact
1737                 $contact = DBA::selectFirst('contact', [], ['id' => $arr["contact-id"], 'self' => false]);
1738                 if (DBA::isResult($contact)) {
1739                         Contact::unmarkForArchival($contact);
1740                 }
1741
1742                 /// @todo On private posts we could obfuscate the date
1743                 $update = ($arr['private'] != self::PRIVATE) || in_array($arr['network'], Protocol::FEDERATED);
1744
1745                 // Is it a forum? Then we don't care about the rules from above
1746                 if (!$update && in_array($arr["network"], [Protocol::ACTIVITYPUB, Protocol::DFRN]) && ($arr["parent-uri-id"] === $arr["uri-id"])) {
1747                         if (DBA::exists('contact', ['id' => $arr['contact-id'], 'forum' => true])) {
1748                                 $update = true;
1749                         }
1750                 }
1751
1752                 if ($update) {
1753                         // The "self" contact id is used (for example in the connectors) when the contact is unknown
1754                         // So we have to ensure to only update the last item when it had been our own post,
1755                         // or it had been done by a "regular" contact.
1756                         if (!empty($arr['wall'])) {
1757                                 $condition = ['id' => $arr['contact-id']];
1758                         } else {
1759                                 $condition = ['id' => $arr['contact-id'], 'self' => false];
1760                         }
1761                         DBA::update('contact', ['failed' => false, 'success_update' => $arr['received'], 'last-item' => $arr['received']], $condition);
1762                 }
1763                 // Now do the same for the system wide contacts with uid=0
1764                 if ($arr['private'] != self::PRIVATE) {
1765                         DBA::update('contact', ['failed' => false, 'success_update' => $arr['received'], 'last-item' => $arr['received']],
1766                                 ['id' => $arr['owner-id']]);
1767
1768                         if ($arr['owner-id'] != $arr['author-id']) {
1769                                 DBA::update('contact', ['failed' => false, 'success_update' => $arr['received'], 'last-item' => $arr['received']],
1770                                         ['id' => $arr['author-id']]);
1771                         }
1772                 }
1773         }
1774
1775         public static function setHashtags($body)
1776         {
1777                 $body = BBCode::performWithEscapedTags($body, ['noparse', 'pre', 'code', 'img'], function ($body) {
1778                         $tags = BBCode::getTags($body);
1779
1780                         // No hashtags?
1781                         if (!count($tags)) {
1782                                 return $body;
1783                         }
1784
1785                         // This sorting is important when there are hashtags that are part of other hashtags
1786                         // Otherwise there could be problems with hashtags like #test and #test2
1787                         // Because of this we are sorting from the longest to the shortest tag.
1788                         usort($tags, function ($a, $b) {
1789                                 return strlen($b) <=> strlen($a);
1790                         });
1791
1792                         $URLSearchString = "^\[\]";
1793
1794                         // All hashtags should point to the home server if "local_tags" is activated
1795                         if (DI::config()->get('system', 'local_tags')) {
1796                                 $body = preg_replace("/#\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",
1797                                         "#[url=" . DI::baseUrl() . "/search?tag=$2]$2[/url]", $body);
1798                         }
1799
1800                         // mask hashtags inside of url, bookmarks and attachments to avoid urls in urls
1801                         $body = preg_replace_callback("/\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",
1802                                 function ($match) {
1803                                         return ("[url=" . str_replace("#", "&num;", $match[1]) . "]" . str_replace("#", "&num;", $match[2]) . "[/url]");
1804                                 }, $body);
1805
1806                         $body = preg_replace_callback("/\[bookmark\=([$URLSearchString]*)\](.*?)\[\/bookmark\]/ism",
1807                                 function ($match) {
1808                                         return ("[bookmark=" . str_replace("#", "&num;", $match[1]) . "]" . str_replace("#", "&num;", $match[2]) . "[/bookmark]");
1809                                 }, $body);
1810
1811                         $body = preg_replace_callback("/\[attachment (.*?)\](.*?)\[\/attachment\]/ism",
1812                                 function ($match) {
1813                                         return ("[attachment " . str_replace("#", "&num;", $match[1]) . "]" . $match[2] . "[/attachment]");
1814                                 }, $body);
1815
1816                         // Repair recursive urls
1817                         $body = preg_replace("/&num;\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",
1818                                 "&num;$2", $body);
1819
1820                         foreach ($tags as $tag) {
1821                                 if ((strpos($tag, '#') !== 0) || strpos($tag, '[url=') || strlen($tag) < 2 || $tag[1] == '#') {
1822                                         continue;
1823                                 }
1824
1825                                 $basetag = str_replace('_', ' ', substr($tag, 1));
1826                                 $newtag = '#[url=' . DI::baseUrl() . '/search?tag=' . $basetag . ']' . $basetag . '[/url]';
1827
1828                                 $body = str_replace($tag, $newtag, $body);
1829                         }
1830
1831                         // Convert back the masked hashtags
1832                         $body = str_replace("&num;", "#", $body);
1833
1834                         return $body;
1835                 });
1836
1837                 return $body;
1838         }
1839
1840         /**
1841          * look for mention tags and setup a second delivery chain for forum/community posts if appropriate
1842          *
1843          * @param int $uid
1844          * @param int $item_id
1845          * @return boolean true if item was deleted, else false
1846          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1847          * @throws \ImagickException
1848          */
1849         private static function tagDeliver($uid, $item_id)
1850         {
1851                 $mention = false;
1852
1853                 $user = DBA::selectFirst('user', [], ['uid' => $uid]);
1854                 if (!DBA::isResult($user)) {
1855                         return false;
1856                 }
1857
1858                 $community_page = (($user['page-flags'] == User::PAGE_FLAGS_COMMUNITY) ? true : false);
1859                 $prvgroup = (($user['page-flags'] == User::PAGE_FLAGS_PRVGROUP) ? true : false);
1860
1861                 $item = Post::selectFirst(self::ITEM_FIELDLIST, ['id' => $item_id]);
1862                 if (!DBA::isResult($item)) {
1863                         return false;
1864                 }
1865
1866                 $link = Strings::normaliseLink(DI::baseUrl() . '/profile/' . $user['nickname']);
1867
1868                 /*
1869                  * Diaspora uses their own hardwired link URL in @-tags
1870                  * instead of the one we supply with webfinger
1871                  */
1872                 $dlink = Strings::normaliseLink(DI::baseUrl() . '/u/' . $user['nickname']);
1873
1874                 $cnt = preg_match_all('/[\@\!]\[url\=(.*?)\](.*?)\[\/url\]/ism', $item['body'], $matches, PREG_SET_ORDER);
1875                 if ($cnt) {
1876                         foreach ($matches as $mtch) {
1877                                 if (Strings::compareLink($link, $mtch[1]) || Strings::compareLink($dlink, $mtch[1])) {
1878                                         $mention = true;
1879                                         Logger::log('mention found: ' . $mtch[2]);
1880                                 }
1881                         }
1882                 }
1883
1884                 if (!$mention) {
1885                         $tags = Tag::getByURIId($item['uri-id'], [Tag::MENTION, Tag::EXCLUSIVE_MENTION]);
1886                         foreach ($tags as $tag) {
1887                                 if (Strings::compareLink($link, $tag['url']) || Strings::compareLink($dlink, $tag['url'])) {
1888                                         $mention = true;
1889                                         DI::logger()->info('mention found in tag.', ['url' => $tag['url']]);
1890                                 }
1891                         }
1892                 }
1893
1894                 if (!$mention) {
1895                         if (($community_page || $prvgroup) &&
1896                                   !$item['wall'] && !$item['origin'] && ($item['gravity'] == GRAVITY_PARENT)) {
1897                                 Logger::info('Delete private group/communiy top-level item without mention', ['id' => $item['id'], 'guid'=> $item['guid']]);
1898                                 Post\User::delete(['uri-id' => $item['uri-id'], 'uid' => $item['uid']]);
1899                                 return true;
1900                         }
1901                         return false;
1902                 }
1903
1904                 $arr = ['item' => $item, 'user' => $user];
1905
1906                 Hook::callAll('tagged', $arr);
1907
1908                 if (!$community_page && !$prvgroup) {
1909                         return false;
1910                 }
1911
1912                 /*
1913                  * tgroup delivery - setup a second delivery chain
1914                  * prevent delivery looping - only proceed
1915                  * if the message originated elsewhere and is a top-level post
1916                  */
1917                 if ($item['wall'] || $item['origin'] || ($item['id'] != $item['parent'])) {
1918                         return false;
1919                 }
1920
1921                 self::performActivity($item['id'], 'announce', $uid);
1922
1923                 /**
1924                  * All the following lines are only needed for private forums and compatibility to older systems without AP support.
1925                  * A possible way would be that the followers list of a forum would always be readable by all followers.
1926                  * So this would mean that the comment distribution could be done exactly for the intended audience.
1927                  * Or possibly we could store the receivers that had been in the "announce" message above and use this.
1928                  */
1929
1930                 // now change this copy of the post to a forum head message and deliver to all the tgroup members
1931                 $self = DBA::selectFirst('contact', ['id', 'name', 'url', 'thumb'], ['uid' => $uid, 'self' => true]);
1932                 if (!DBA::isResult($self)) {
1933                         return false;
1934                 }
1935
1936                 $owner_id = Contact::getIdForURL($self['url']);
1937
1938                 // also reset all the privacy bits to the forum default permissions
1939                 if ($user['allow_cid'] || $user['allow_gid'] || $user['deny_cid'] || $user['deny_gid']) {
1940                         $private = self::PRIVATE;
1941                 } elseif (DI::pConfig()->get($user['uid'], 'system', 'unlisted')) {
1942                         $private = self::UNLISTED;
1943                 } else {
1944                         $private = self::PUBLIC;
1945                 }
1946
1947                 $psid = PermissionSet::getIdFromACL(
1948                         $user['uid'],
1949                         $user['allow_cid'],
1950                         $user['allow_gid'],
1951                         $user['deny_cid'],
1952                         $user['deny_gid']
1953                 );
1954
1955                 $forum_mode = ($prvgroup ? 2 : 1);
1956
1957                 $fields = ['wall' => true, 'origin' => true, 'forum_mode' => $forum_mode, 'contact-id' => $self['id'],
1958                         'owner-id' => $owner_id, 'private' => $private, 'psid' => $psid];
1959                 self::update($fields, ['id' => $item['id']]);
1960
1961                 Worker::add(['priority' => PRIORITY_HIGH, 'dont_fork' => true], 'Notifier', Delivery::POST, (int)$item['uri-id'], (int)$item['uid']);
1962
1963                 return false;
1964         }
1965
1966         /**
1967          * Automatically reshare the item if the "remote_self" option is selected
1968          *
1969          * @param array $item
1970          * @return void
1971          */
1972         private static function autoReshare(array $item)
1973         {
1974                 if ($item['gravity'] != GRAVITY_PARENT) {
1975                         return;
1976                 }
1977
1978                 if (!DBA::exists('contact', ['id' => $item['contact-id'], 'remote_self' => Contact::MIRROR_NATIVE_RESHARE])) {
1979                         return;
1980                 }
1981
1982                 if (!in_array($item['network'], [Protocol::ACTIVITYPUB, Protocol::DFRN])) {
1983                         return;
1984                 }
1985
1986                 Logger::info('Automatically reshare item', ['uid' => $item['uid'], 'id' => $item['id'], 'guid' => $item['guid'], 'uri-id' => $item['uri-id']]);
1987
1988                 self::performActivity($item['id'], 'announce', $item['uid']);
1989         }
1990
1991         public static function isRemoteSelf($contact, &$datarray)
1992         {
1993                 if (!$contact['remote_self']) {
1994                         return false;
1995                 }
1996
1997                 // Prevent the forwarding of posts that are forwarded
1998                 if (!empty($datarray["extid"]) && ($datarray["extid"] == Protocol::DFRN)) {
1999                         Logger::info('Already forwarded');
2000                         return false;
2001                 }
2002
2003                 // Prevent to forward already forwarded posts
2004                 if ($datarray["app"] == DI::baseUrl()->getHostname()) {
2005                         Logger::info('Already forwarded (second test)');
2006                         return false;
2007                 }
2008
2009                 // Only forward posts
2010                 if ($datarray["verb"] != Activity::POST) {
2011                         Logger::info('No post');
2012                         return false;
2013                 }
2014
2015                 if (($contact['network'] != Protocol::FEED) && ($datarray['private'] == self::PRIVATE)) {
2016                         Logger::info('Not public');
2017                         return false;
2018                 }
2019
2020                 $datarray2 = $datarray;
2021                 Logger::info('remote-self start', ['contact' => $contact['url'], 'remote_self'=> $contact['remote_self'], 'item' => $datarray]);
2022                 if ($contact['remote_self'] == Contact::MIRROR_OWN_POST) {
2023                         $self = DBA::selectFirst('contact', ['id', 'name', 'url', 'thumb'],
2024                                         ['uid' => $contact['uid'], 'self' => true]);
2025                         if (DBA::isResult($self)) {
2026                                 $datarray['contact-id'] = $self["id"];
2027
2028                                 $datarray['owner-name'] = $self["name"];
2029                                 $datarray['owner-link'] = $self["url"];
2030                                 $datarray['owner-avatar'] = $self["thumb"];
2031
2032                                 $datarray['author-name']   = $datarray['owner-name'];
2033                                 $datarray['author-link']   = $datarray['owner-link'];
2034                                 $datarray['author-avatar'] = $datarray['owner-avatar'];
2035
2036                                 unset($datarray['edited']);
2037
2038                                 unset($datarray['network']);
2039                                 unset($datarray['owner-id']);
2040                                 unset($datarray['author-id']);
2041                         }
2042
2043                         if ($contact['network'] != Protocol::FEED) {
2044                                 $old_uri_id = $datarray["uri-id"] ?? 0;
2045                                 $datarray["guid"] = System::createUUID();
2046                                 unset($datarray["plink"]);
2047                                 $datarray["uri"] = self::newURI($contact['uid'], $datarray["guid"]);
2048                                 $datarray["uri-id"] = ItemURI::getIdByURI($datarray["uri"]);
2049                                 $datarray["extid"] = Protocol::DFRN;
2050                                 $urlpart = parse_url($datarray2['author-link']);
2051                                 $datarray["app"] = $urlpart["host"];
2052                                 if (!empty($old_uri_id)) {
2053                                         Post\Media::copy($old_uri_id, $datarray["uri-id"]);
2054                                 }
2055
2056                                 unset($datarray["parent-uri"]);
2057                                 unset($datarray["thr-parent"]);
2058                         } else {
2059                                 $datarray['private'] = self::PUBLIC;
2060                         }
2061                 }
2062
2063                 if ($contact['network'] != Protocol::FEED) {
2064                         // Store the original post
2065                         $result = self::insert($datarray2);
2066                         Logger::info('remote-self post original item', ['contact' => $contact['url'], 'result'=> $result, 'item' => $datarray2]);
2067                 } else {
2068                         $datarray["app"] = "Feed";
2069                         $result = true;
2070                 }
2071
2072                 return (bool)$result;
2073         }
2074
2075         /**
2076          *
2077          * @param string $s
2078          * @param int    $uid
2079          * @param array  $item
2080          * @param int    $cid
2081          * @return string
2082          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
2083          * @throws \ImagickException
2084          */
2085         public static function fixPrivatePhotos($s, $uid, $item = null, $cid = 0)
2086         {
2087                 if (DI::config()->get('system', 'disable_embedded')) {
2088                         return $s;
2089                 }
2090
2091                 Logger::info('check for photos');
2092                 $site = substr(DI::baseUrl(), strpos(DI::baseUrl(), '://'));
2093
2094                 $orig_body = $s;
2095                 $new_body = '';
2096
2097                 $img_start = strpos($orig_body, '[img');
2098                 $img_st_close = ($img_start !== false ? strpos(substr($orig_body, $img_start), ']') : false);
2099                 $img_len = ($img_start !== false ? strpos(substr($orig_body, $img_start + $img_st_close + 1), '[/img]') : false);
2100
2101                 while (($img_st_close !== false) && ($img_len !== false)) {
2102                         $img_st_close++; // make it point to AFTER the closing bracket
2103                         $image = substr($orig_body, $img_start + $img_st_close, $img_len);
2104
2105                         Logger::info('found photo', ['image' => $image]);
2106
2107                         if (stristr($image, $site . '/photo/')) {
2108                                 // Only embed locally hosted photos
2109                                 $replace = false;
2110                                 $i = basename($image);
2111                                 $i = str_replace(['.jpg', '.png', '.gif'], ['', '', ''], $i);
2112                                 $x = strpos($i, '-');
2113
2114                                 if ($x) {
2115                                         $res = substr($i, $x + 1);
2116                                         $i = substr($i, 0, $x);
2117                                         $photo = Photo::getPhotoForUser($uid, $i, $res);
2118                                         if (DBA::isResult($photo)) {
2119                                                 /*
2120                                                  * Check to see if we should replace this photo link with an embedded image
2121                                                  * 1. No need to do so if the photo is public
2122                                                  * 2. If there's a contact-id provided, see if they're in the access list
2123                                                  *    for the photo. If so, embed it.
2124                                                  * 3. Otherwise, if we have an item, see if the item permissions match the photo
2125                                                  *    permissions, regardless of order but first check to see if they're an exact
2126                                                  *    match to save some processing overhead.
2127                                                  */
2128                                                 if (self::hasPermissions($photo)) {
2129                                                         if ($cid) {
2130                                                                 $recips = self::enumeratePermissions($photo);
2131                                                                 if (in_array($cid, $recips)) {
2132                                                                         $replace = true;
2133                                                                 }
2134                                                         } elseif ($item) {
2135                                                                 if (self::samePermissions($uid, $item, $photo)) {
2136                                                                         $replace = true;
2137                                                                 }
2138                                                         }
2139                                                 }
2140                                                 if ($replace) {
2141                                                         $photo_img = Photo::getImageForPhoto($photo);
2142                                                         // If a custom width and height were specified, apply before embedding
2143                                                         if (preg_match("/\[img\=([0-9]*)x([0-9]*)\]/is", substr($orig_body, $img_start, $img_st_close), $match)) {
2144                                                                 Logger::info('scaling photo');
2145
2146                                                                 $width = intval($match[1]);
2147                                                                 $height = intval($match[2]);
2148
2149                                                                 $photo_img->scaleDown(max($width, $height));
2150                                                         }
2151
2152                                                         $data = $photo_img->asString();
2153                                                         $type = $photo_img->getType();
2154
2155                                                         Logger::info('replacing photo');
2156                                                         $image = 'data:' . $type . ';base64,' . base64_encode($data);
2157                                                         Logger::debug('replaced', ['image' => $image]);
2158                                                 }
2159                                         }
2160                                 }
2161                         }
2162
2163                         $new_body = $new_body . substr($orig_body, 0, $img_start + $img_st_close) . $image . '[/img]';
2164                         $orig_body = substr($orig_body, $img_start + $img_st_close + $img_len + strlen('[/img]'));
2165                         if ($orig_body === false) {
2166                                 $orig_body = '';
2167                         }
2168
2169                         $img_start = strpos($orig_body, '[img');
2170                         $img_st_close = ($img_start !== false ? strpos(substr($orig_body, $img_start), ']') : false);
2171                         $img_len = ($img_start !== false ? strpos(substr($orig_body, $img_start + $img_st_close + 1), '[/img]') : false);
2172                 }
2173
2174                 $new_body = $new_body . $orig_body;
2175
2176                 return $new_body;
2177         }
2178
2179         private static function hasPermissions($obj)
2180         {
2181                 return !empty($obj['allow_cid']) || !empty($obj['allow_gid']) ||
2182                         !empty($obj['deny_cid']) || !empty($obj['deny_gid']);
2183         }
2184
2185         private static function samePermissions($uid, $obj1, $obj2)
2186         {
2187                 // first part is easy. Check that these are exactly the same.
2188                 if (($obj1['allow_cid'] == $obj2['allow_cid'])
2189                         && ($obj1['allow_gid'] == $obj2['allow_gid'])
2190                         && ($obj1['deny_cid'] == $obj2['deny_cid'])
2191                         && ($obj1['deny_gid'] == $obj2['deny_gid'])) {
2192                         return true;
2193                 }
2194
2195                 // This is harder. Parse all the permissions and compare the resulting set.
2196                 $recipients1 = self::enumeratePermissions($obj1);
2197                 $recipients2 = self::enumeratePermissions($obj2);
2198                 sort($recipients1);
2199                 sort($recipients2);
2200
2201                 /// @TODO Comparison of arrays, maybe use array_diff_assoc() here?
2202                 return ($recipients1 == $recipients2);
2203         }
2204
2205         /**
2206          * Returns an array of contact-ids that are allowed to see this object
2207          *
2208          * @param array $obj        Item array with at least uid, allow_cid, allow_gid, deny_cid and deny_gid
2209          * @param bool  $check_dead Prunes unavailable contacts from the result
2210          * @return array
2211          * @throws \Exception
2212          */
2213         public static function enumeratePermissions(array $obj, bool $check_dead = false)
2214         {
2215                 $aclFormater = DI::aclFormatter();
2216
2217                 $allow_people = $aclFormater->expand($obj['allow_cid']);
2218                 $allow_groups = Group::expand($obj['uid'], $aclFormater->expand($obj['allow_gid']), $check_dead);
2219                 $deny_people  = $aclFormater->expand($obj['deny_cid']);
2220                 $deny_groups  = Group::expand($obj['uid'], $aclFormater->expand($obj['deny_gid']), $check_dead);
2221                 $recipients   = array_unique(array_merge($allow_people, $allow_groups));
2222                 $deny         = array_unique(array_merge($deny_people, $deny_groups));
2223                 $recipients   = array_diff($recipients, $deny);
2224                 return $recipients;
2225         }
2226
2227         public static function expire(int $uid, int $days, string $network = "", bool $force = false)
2228         {
2229                 if (!$uid || ($days < 1)) {
2230                         return;
2231                 }
2232
2233                 $condition = ["`uid` = ? AND NOT `deleted` AND `gravity` = ?",
2234                         $uid, GRAVITY_PARENT];
2235
2236                 /*
2237                  * $expire_network_only = save your own wall posts
2238                  * and just expire conversations started by others
2239                  */
2240                 $expire_network_only = DI::pConfig()->get($uid, 'expire', 'network_only', false);
2241
2242                 if ($expire_network_only) {
2243                         $condition[0] .= " AND NOT `wall`";
2244                 }
2245
2246                 if ($network != "") {
2247                         $condition[0] .= " AND `network` = ?";
2248                         $condition[] = $network;
2249                 }
2250
2251                 $condition[0] .= " AND `received` < UTC_TIMESTAMP() - INTERVAL ? DAY";
2252                 $condition[] = $days;
2253
2254                 $items = Post::select(['resource-id', 'starred', 'id', 'post-type', 'uid', 'uri-id'], $condition);
2255
2256                 if (!DBA::isResult($items)) {
2257                         return;
2258                 }
2259
2260                 $expire_items = DI::pConfig()->get($uid, 'expire', 'items', true);
2261
2262                 // Forcing expiring of items - but not notes and marked items
2263                 if ($force) {
2264                         $expire_items = true;
2265                 }
2266
2267                 $expire_notes = DI::pConfig()->get($uid, 'expire', 'notes', true);
2268                 $expire_starred = DI::pConfig()->get($uid, 'expire', 'starred', true);
2269                 $expire_photos = DI::pConfig()->get($uid, 'expire', 'photos', false);
2270
2271                 $expired = 0;
2272
2273                 $priority = DI::config()->get('system', 'expire-notify-priority');
2274
2275                 while ($item = Post::fetch($items)) {
2276                         // don't expire filed items
2277                         if (DBA::exists('post-category', ['uri-id' => $item['uri-id'], 'uid' => $item['uid'], 'type' => Post\Category::FILE])) {
2278                                 continue;
2279                         }
2280
2281                         // Only expire posts, not photos and photo comments
2282
2283                         if (!$expire_photos && !empty($item['resource-id'])) {
2284                                 continue;
2285                         } elseif (!$expire_starred && intval($item['starred'])) {
2286                                 continue;
2287                         } elseif (!$expire_notes && ($item['post-type'] == self::PT_PERSONAL_NOTE)) {
2288                                 continue;
2289                         } elseif (!$expire_items && ($item['post-type'] != self::PT_PERSONAL_NOTE)) {
2290                                 continue;
2291                         }
2292
2293                         self::markForDeletionById($item['id'], $priority);
2294
2295                         ++$expired;
2296                 }
2297                 DBA::close($items);
2298                 Logger::log('User ' . $uid . ": expired $expired items; expire items: $expire_items, expire notes: $expire_notes, expire starred: $expire_starred, expire photos: $expire_photos");
2299         }
2300
2301         public static function firstPostDate($uid, $wall = false)
2302         {
2303                 $user = User::getById($uid, ['register_date']);
2304                 if (empty($user)) {
2305                         return false;
2306                 }
2307
2308                 $condition = ["`uid` = ? AND `wall` = ? AND NOT `deleted` AND `visible` AND `received` >= ?",
2309                         $uid, $wall, $user['register_date']];
2310                 $params = ['order' => ['received' => false]];
2311                 $thread = Post::selectFirstThread(['received'], $condition, $params);
2312                 if (DBA::isResult($thread)) {
2313                         $postdate = substr(DateTimeFormat::local($thread['received']), 0, 10);
2314                         return $postdate;
2315                 }
2316                 return false;
2317         }
2318
2319         /**
2320          * add/remove activity to an item
2321          *
2322          * Toggle activities as like,dislike,attend of an item
2323          *
2324          * @param int $item_id
2325          * @param string $verb
2326          *            Activity verb. One of
2327          *            like, unlike, dislike, undislike, attendyes, unattendyes,
2328          *            attendno, unattendno, attendmaybe, unattendmaybe,
2329          *            announce, unannouce
2330          * @return bool
2331          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
2332          * @throws \ImagickException
2333          * @hook  'post_local_end'
2334          *            array $arr
2335          *            'post_id' => ID of posted item
2336          */
2337         public static function performActivity(int $item_id, string $verb, int $uid)
2338         {
2339                 if (empty($uid)) {
2340                         return false;
2341                 }
2342
2343                 Logger::notice('Start create activity', ['verb' => $verb, 'item' => $item_id, 'user' => $uid]);
2344
2345                 $item = Post::selectFirst(self::ITEM_FIELDLIST, ['id' => $item_id]);
2346                 if (!DBA::isResult($item)) {
2347                         Logger::log('like: unknown item ' . $item_id);
2348                         return false;
2349                 }
2350
2351                 $uri_id = $item['uri-id'];
2352
2353                 if (!in_array($item['uid'], [0, $uid])) {
2354                         return false;
2355                 }
2356
2357                 if (!Post::exists(['uri-id' => $item['parent-uri-id'], 'uid' => $uid])) {
2358                         $stored = self::storeForUserByUriId($item['parent-uri-id'], $uid);
2359                         if (($item['parent-uri-id'] == $item['uri-id']) && !empty($stored)) {
2360                                 $item = Post::selectFirst(self::ITEM_FIELDLIST, ['id' => $stored]);
2361                                 if (!DBA::isResult($item)) {
2362                                         Logger::info('Could not fetch just created item - should not happen', ['stored' => $stored, 'uid' => $uid, 'uri-id' => $uri_id]);
2363                                         return false;
2364                                 }
2365                         }
2366                 }
2367
2368                 // Retrieves the local post owner
2369                 $owner = User::getOwnerDataById($uid);
2370                 if (empty($owner)) {
2371                         Logger::info('Empty owner for user', ['uid' => $uid]);
2372                         return false;
2373                 }
2374
2375                 // Retrieve the current logged in user's public contact
2376                 $author_id = Contact::getIdForURL($owner['url']);
2377                 if (empty($author_id)) {
2378                         Logger::info('Empty public contact');
2379                         return false;
2380                 }
2381
2382                 $activity = null;
2383                 switch ($verb) {
2384                         case 'like':
2385                         case 'unlike':
2386                                 $activity = Activity::LIKE;
2387                                 break;
2388                         case 'dislike':
2389                         case 'undislike':
2390                                 $activity = Activity::DISLIKE;
2391                                 break;
2392                         case 'attendyes':
2393                         case 'unattendyes':
2394                                 $activity = Activity::ATTEND;
2395                                 break;
2396                         case 'attendno':
2397                         case 'unattendno':
2398                                 $activity = Activity::ATTENDNO;
2399                                 break;
2400                         case 'attendmaybe':
2401                         case 'unattendmaybe':
2402                                 $activity = Activity::ATTENDMAYBE;
2403                                 break;
2404                         case 'follow':
2405                         case 'unfollow':
2406                                 $activity = Activity::FOLLOW;
2407                                 break;
2408                         case 'announce':
2409                         case 'unannounce':
2410                                 $activity = Activity::ANNOUNCE;
2411                                 break;
2412                         default:
2413                                 Logger::notice('unknown verb', ['verb' => $verb, 'item' => $item_id]);
2414                                 return false;
2415                 }
2416
2417                 $mode = Strings::startsWith($verb, 'un') ? 'delete' : 'create';
2418
2419                 // Enable activity toggling instead of on/off
2420                 $event_verb_flag = $activity === Activity::ATTEND || $activity === Activity::ATTENDNO || $activity === Activity::ATTENDMAYBE;
2421
2422                 // Look for an existing verb row
2423                 // Event participation activities are mutually exclusive, only one of them can exist at all times.
2424                 if ($event_verb_flag) {
2425                         $verbs = [Activity::ATTEND, Activity::ATTENDNO, Activity::ATTENDMAYBE];
2426
2427                         // Translate to the index based activity index
2428                         $vids = [];
2429                         foreach ($verbs as $verb) {
2430                                 $vids[] = Verb::getID($verb);
2431                         }
2432                 } else {
2433                         $vids = Verb::getID($activity);
2434                 }
2435
2436                 $condition = ['vid' => $vids, 'deleted' => false, 'gravity' => GRAVITY_ACTIVITY,
2437                         'author-id' => $author_id, 'uid' => $item['uid'], 'thr-parent-id' => $uri_id];
2438                 $like_item = Post::selectFirst(['id', 'guid', 'verb'], $condition);
2439
2440                 if (DBA::isResult($like_item)) {
2441                         /**
2442                          * Truth table for existing activities
2443                          *
2444                          * |          Inputs            ||      Outputs      |
2445                          * |----------------------------||-------------------|
2446                          * |  Mode  | Event | Same verb || Delete? | Return? |
2447                          * |--------|-------|-----------||---------|---------|
2448                          * | create |  Yes  |    Yes    ||   No    |   Yes   |
2449                          * | create |  Yes  |    No     ||   Yes   |   No    |
2450                          * | create |  No   |    Yes    ||   No    |   Yes   |
2451                          * | create |  No   |    No     ||        N/A†       |
2452                          * | delete |  Yes  |    Yes    ||   Yes   |   N/A‡  |
2453                          * | delete |  Yes  |    No     ||   No    |   N/A‡  |
2454                          * | delete |  No   |    Yes    ||   Yes   |   N/A‡  |
2455                          * | delete |  No   |    No     ||        N/A†       |
2456                          * |--------|-------|-----------||---------|---------|
2457                          * |   A    |   B   |     C     || A xor C | !B or C |
2458                          *
2459                          * † Can't happen: It's impossible to find an existing non-event activity without
2460                          *                 the same verb because we are only looking for this single verb.
2461                          *
2462                          * ‡ The "mode = delete" is returning early whether an existing activity was found or not.
2463                          */
2464                         if ($mode == 'create' xor $like_item['verb'] == $activity) {
2465                                 self::markForDeletionById($like_item['id']);
2466                         }
2467
2468                         if (!$event_verb_flag || $like_item['verb'] == $activity) {
2469                                 return true;
2470                         }
2471                 }
2472
2473                 // No need to go further if we aren't creating anything
2474                 if ($mode == 'delete') {
2475                         return true;
2476                 }
2477
2478                 $objtype = $item['resource-id'] ? Activity\ObjectType::IMAGE : Activity\ObjectType::NOTE;
2479
2480                 $new_item = [
2481                         'guid'          => System::createUUID(),
2482                         'uri'           => self::newURI($item['uid']),
2483                         'uid'           => $item['uid'],
2484                         'contact-id'    => $owner['id'],
2485                         'wall'          => $item['wall'],
2486                         'origin'        => 1,
2487                         'network'       => Protocol::DFRN,
2488                         'protocol'      => Conversation::PARCEL_DIRECT,
2489                         'direction'     => Conversation::PUSH,
2490                         'gravity'       => GRAVITY_ACTIVITY,
2491                         'parent'        => $item['id'],
2492                         'thr-parent'    => $item['uri'],
2493                         'owner-id'      => $author_id,
2494                         'author-id'     => $author_id,
2495                         'body'          => $activity,
2496                         'verb'          => $activity,
2497                         'object-type'   => $objtype,
2498                         'allow_cid'     => $item['allow_cid'],
2499                         'allow_gid'     => $item['allow_gid'],
2500                         'deny_cid'      => $item['deny_cid'],
2501                         'deny_gid'      => $item['deny_gid'],
2502                         'visible'       => 1,
2503                         'unseen'        => 1,
2504                 ];
2505
2506                 $signed = Diaspora::createLikeSignature($uid, $new_item);
2507                 if (!empty($signed)) {
2508                         $new_item['diaspora_signed_text'] = json_encode($signed);
2509                 }
2510
2511                 $new_item_id = self::insert($new_item);
2512
2513                 // If the parent item isn't visible then set it to visible
2514                 if (!$item['visible']) {
2515                         self::update(['visible' => true], ['id' => $item['id']]);
2516                 }
2517
2518                 $new_item['id'] = $new_item_id;
2519
2520                 Hook::callAll('post_local_end', $new_item);
2521
2522                 return true;
2523         }
2524
2525         /**
2526          * Fetch the SQL condition for the given user id
2527          *
2528          * @param integer $owner_id User ID for which the permissions should be fetched
2529          * @return array condition
2530          */
2531         public static function getPermissionsConditionArrayByUserId(int $owner_id)
2532         {
2533                 $local_user = local_user();
2534                 $remote_user = Session::getRemoteContactID($owner_id);
2535
2536                 // default permissions - anonymous user
2537                 $condition = ["`private` != ?", self::PRIVATE];
2538
2539                 if ($local_user && ($local_user == $owner_id)) {
2540                         // Profile owner - everything is visible
2541                         $condition = [];
2542                 } elseif ($remote_user) {
2543                          // Authenticated visitor - fetch the matching permissionsets
2544                         $set = PermissionSet::get($owner_id, $remote_user);
2545                         if (!empty($set)) {
2546                                 $condition = ["(`private` != ? OR (`private` = ? AND `wall`
2547                                         AND `psid` IN (" . implode(', ', array_fill(0, count($set), '?')) . ")))",
2548                                         self::PRIVATE, self::PRIVATE];
2549                                 $condition = array_merge($condition, $set);
2550                         }
2551                 }
2552
2553                 return $condition;
2554         }
2555
2556         /**
2557          * Get a permission SQL string for the given user
2558          *
2559          * @param int $owner_id
2560          * @param string $table
2561          * @return string
2562          */
2563         public static function getPermissionsSQLByUserId(int $owner_id, string $table = '')
2564         {
2565                 $local_user = local_user();
2566                 $remote_user = Session::getRemoteContactID($owner_id);
2567
2568                 if (!empty($table)) {
2569                         $table = DBA::quoteIdentifier($table) . '.';
2570                 }
2571
2572                 /*
2573                  * Construct permissions
2574                  *
2575                  * default permissions - anonymous user
2576                  */
2577                 $sql = sprintf(" AND " . $table . "`private` != %d", self::PRIVATE);
2578
2579                 // Profile owner - everything is visible
2580                 if ($local_user && ($local_user == $owner_id)) {
2581                         $sql = '';
2582                 } elseif ($remote_user) {
2583                         /*
2584                          * Authenticated visitor. Unless pre-verified,
2585                          * check that the contact belongs to this $owner_id
2586                          * and load the groups the visitor belongs to.
2587                          * If pre-verified, the caller is expected to have already
2588                          * done this and passed the groups into this function.
2589                          */
2590                         $set = PermissionSet::get($owner_id, $remote_user);
2591
2592                         if (!empty($set)) {
2593                                 $sql_set = sprintf(" OR (" . $table . "`private` = %d AND " . $table . "`wall` AND " . $table . "`psid` IN (", self::PRIVATE) . implode(',', $set) . "))";
2594                         } else {
2595                                 $sql_set = '';
2596                         }
2597
2598                         $sql = sprintf(" AND (" . $table . "`private` != %d", self::PRIVATE) . $sql_set . ")";
2599                 }
2600
2601                 return $sql;
2602         }
2603
2604         /**
2605          * get translated item type
2606          *
2607          * @param array                $item
2608          * @param \Friendica\Core\L10n $l10n
2609          * @return string
2610          */
2611         public static function postType(array $item, \Friendica\Core\L10n $l10n)
2612         {
2613                 if (!empty($item['event-id'])) {
2614                         return $l10n->t('event');
2615                 } elseif (!empty($item['resource-id'])) {
2616                         return $l10n->t('photo');
2617                 } elseif ($item['gravity'] == GRAVITY_ACTIVITY) {
2618                         return $l10n->t('activity');
2619                 } elseif ($item['gravity'] == GRAVITY_COMMENT) {
2620                         return $l10n->t('comment');
2621                 }
2622
2623                 return $l10n->t('post');
2624         }
2625
2626         /**
2627          * Sets the "rendered-html" field of the provided item
2628          *
2629          * Body is preserved to avoid side-effects as we modify it just-in-time for spoilers and private image links
2630          *
2631          * @param array $item
2632          *
2633          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
2634          * @todo Remove reference, simply return "rendered-html" and "rendered-hash"
2635          */
2636         public static function putInCache(&$item)
2637         {
2638                 // Save original body to prevent addons to modify it
2639                 $body = $item['body'];
2640
2641                 $rendered_hash = $item['rendered-hash'] ?? '';
2642                 $rendered_html = $item['rendered-html'] ?? '';
2643
2644                 if ($rendered_hash == ''
2645                         || $rendered_html == ''
2646                         || $rendered_hash != hash('md5', BBCode::VERSION . '::' . $body)
2647                         || DI::config()->get('system', 'ignore_cache')
2648                 ) {
2649                         self::addRedirToImageTags($item);
2650
2651                         $item['rendered-html'] = BBCode::convertForUriId($item['uri-id'], $item['body']);
2652                         $item['rendered-hash'] = hash('md5', BBCode::VERSION . '::' . $body);
2653
2654                         $hook_data = ['item' => $item, 'rendered-html' => $item['rendered-html'], 'rendered-hash' => $item['rendered-hash']];
2655                         Hook::callAll('put_item_in_cache', $hook_data);
2656                         $item['rendered-html'] = $hook_data['rendered-html'];
2657                         $item['rendered-hash'] = $hook_data['rendered-hash'];
2658                         unset($hook_data);
2659
2660                         // Update if the generated values differ from the existing ones
2661                         if ((($rendered_hash != $item['rendered-hash']) || ($rendered_html != $item['rendered-html'])) && !empty($item['id'])) {
2662                                 self::update(
2663                                         [
2664                                                 'rendered-html' => $item['rendered-html'],
2665                                                 'rendered-hash' => $item['rendered-hash']
2666                                         ],
2667                                         ['id' => $item['id']]
2668                                 );
2669                         }
2670                 }
2671
2672                 $item['body'] = $body;
2673         }
2674
2675         /**
2676          * Find any non-embedded images in private items and add redir links to them
2677          *
2678          * @param array &$item The field array of an item row
2679          */
2680         private static function addRedirToImageTags(array &$item)
2681         {
2682                 $app = DI::app();
2683
2684                 $matches = [];
2685                 $cnt = preg_match_all('|\[img\](http[^\[]*?/photo/[a-fA-F0-9]+?(-[0-9]\.[\w]+?)?)\[\/img\]|', $item['body'], $matches, PREG_SET_ORDER);
2686                 if ($cnt) {
2687                         foreach ($matches as $mtch) {
2688                                 if (strpos($mtch[1], '/redir') !== false) {
2689                                         continue;
2690                                 }
2691
2692                                 if ((local_user() == $item['uid']) && ($item['private'] == self::PRIVATE) && ($item['contact-id'] != $app->contact['id']) && ($item['network'] == Protocol::DFRN)) {
2693                                         $img_url = 'redir/' . $item['contact-id'] . '?url=' . urlencode($mtch[1]);
2694                                         $item['body'] = str_replace($mtch[0], '[img]' . $img_url . '[/img]', $item['body']);
2695                                 }
2696                         }
2697                 }
2698         }
2699
2700         /**
2701          * Given an item array, convert the body element from bbcode to html and add smilie icons.
2702          * If attach is true, also add icons for item attachments.
2703          *
2704          * @param array   $item
2705          * @param boolean $attach
2706          * @param boolean $is_preview
2707          * @return string item body html
2708          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
2709          * @throws \ImagickException
2710          * @hook  prepare_body_init item array before any work
2711          * @hook  prepare_body_content_filter ('item'=>item array, 'filter_reasons'=>string array) before first bbcode to html
2712          * @hook  prepare_body ('item'=>item array, 'html'=>body string, 'is_preview'=>boolean, 'filter_reasons'=>string array) after first bbcode to html
2713          * @hook  prepare_body_final ('item'=>item array, 'html'=>body string) after attach icons and blockquote special case handling (spoiler, author)
2714          */
2715         public static function prepareBody(array &$item, $attach = false, $is_preview = false)
2716         {
2717                 $a = DI::app();
2718                 Hook::callAll('prepare_body_init', $item);
2719
2720                 // In order to provide theme developers more possibilities, event items
2721                 // are treated differently.
2722                 if ($item['object-type'] === Activity\ObjectType::EVENT && isset($item['event-id'])) {
2723                         $ev = Event::getItemHTML($item);
2724                         return $ev;
2725                 }
2726
2727                 $tags = Tag::populateFromItem($item);
2728
2729                 $item['tags'] = $tags['tags'];
2730                 $item['hashtags'] = $tags['hashtags'];
2731                 $item['mentions'] = $tags['mentions'];
2732
2733                 // Compile eventual content filter reasons
2734                 $filter_reasons = [];
2735                 if (!$is_preview && public_contact() != $item['author-id']) {
2736                         if (!empty($item['content-warning']) && (!local_user() || !DI::pConfig()->get(local_user(), 'system', 'disable_cw', false))) {
2737                                 $filter_reasons[] = DI::l10n()->t('Content warning: %s', $item['content-warning']);
2738                         }
2739
2740                         $hook_data = [
2741                                 'item' => $item,
2742                                 'filter_reasons' => $filter_reasons
2743                         ];
2744                         Hook::callAll('prepare_body_content_filter', $hook_data);
2745                         $filter_reasons = $hook_data['filter_reasons'];
2746                         unset($hook_data);
2747                 }
2748
2749                 $body = $item['body'] ?? '';
2750                 $shared = BBCode::fetchShareAttributes($body);
2751                 if (!empty($shared['guid'])) {
2752                         $shared_item = Post::selectFirst(['uri-id', 'plink'], ['guid' => $shared['guid']]);
2753                         $shared_uri_id = $shared_item['uri-id'] ?? 0;
2754                         $shared_links = [strtolower($shared_item['plink'] ?? '')];
2755                         $shared_attachments = Post\Media::splitAttachments($shared_uri_id, $shared['guid']);
2756                         $shared_links = array_merge($shared_links, array_column($shared_attachments['visual'], 'url'));
2757                         $shared_links = array_merge($shared_links, array_column($shared_attachments['link'], 'url'));
2758                         $shared_links = array_merge($shared_links, array_column($shared_attachments['additional'], 'url'));
2759                         $item['body'] = self::replaceVisualAttachments($shared_attachments, $item['body']);
2760                 } else {
2761                         $shared_uri_id = 0;
2762                         $shared_links = [];
2763                 }
2764                 $attachments = Post\Media::splitAttachments($item['uri-id'], $item['guid'] ?? '', $shared_links);
2765                 $item['body'] = self::replaceVisualAttachments($attachments, $item['body'] ?? '');
2766
2767                 $item['body'] = preg_replace("/\s*\[attachment .*?\].*?\[\/attachment\]\s*/ism", "\n", $item['body']);
2768                 self::putInCache($item);
2769                 $item['body'] = $body;
2770                 $s = $item["rendered-html"];
2771
2772                 $hook_data = [
2773                         'item' => $item,
2774                         'html' => $s,
2775                         'preview' => $is_preview,
2776                         'filter_reasons' => $filter_reasons
2777                 ];
2778                 Hook::callAll('prepare_body', $hook_data);
2779                 $s = $hook_data['html'];
2780                 unset($hook_data);
2781
2782                 if (!$attach) {
2783                         // Replace the blockquotes with quotes that are used in mails.
2784                         $mailquote = '<blockquote type="cite" class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">';
2785                         $s = str_replace(['<blockquote>', '<blockquote class="spoiler">', '<blockquote class="author">'], [$mailquote, $mailquote, $mailquote], $s);
2786                         return $s;
2787                 }
2788
2789                 if (!empty($shared_attachments)) {
2790                         $s = self::addVisualAttachments($shared_attachments, $item, $s, true);
2791                         $s = self::addLinkAttachment($shared_uri_id ?: $item['uri-id'], $shared_attachments, $body, $s, true, []);
2792                         $s = self::addNonVisualAttachments($shared_attachments, $item, $s, true);
2793                         $body = preg_replace("/\s*\[share .*?\].*?\[\/share\]\s*/ism", '', $body);
2794                 }
2795
2796                 $s = self::addVisualAttachments($attachments, $item, $s, false);
2797                 $s = self::addLinkAttachment($item['uri-id'], $attachments, $body, $s, false, $shared_links);
2798                 $s = self::addNonVisualAttachments($attachments, $item, $s, false);
2799
2800                 // Map.
2801                 if (strpos($s, '<div class="map">') !== false && !empty($item['coord'])) {
2802                         $x = Map::byCoordinates(trim($item['coord']));
2803                         if ($x) {
2804                                 $s = preg_replace('/\<div class\=\"map\"\>/', '$0' . $x, $s);
2805                         }
2806                 }
2807
2808                 // Replace friendica image url size with theme preference.
2809                 if (!empty($a->theme_info['item_image_size'])) {
2810                         $ps = $a->theme_info['item_image_size'];
2811                         $s = preg_replace('|(<img[^>]+src="[^"]+/photo/[0-9a-f]+)-[0-9]|', "$1-" . $ps, $s);
2812                 }
2813
2814                 $s = HTML::applyContentFilter($s, $filter_reasons);
2815
2816                 $hook_data = ['item' => $item, 'html' => $s];
2817                 Hook::callAll('prepare_body_final', $hook_data);
2818
2819                 return $hook_data['html'];
2820         }
2821
2822         /**
2823          * Check if the body contains a link
2824          *
2825          * @param string $body
2826          * @param string $url
2827          * @param int    $type
2828          * @return bool
2829          */
2830         public static function containsLink(string $body, string $url, int $type = 0)
2831         {
2832                 // Make sure that for example site parameters aren't used when testing if the link is contained in the body
2833                 $urlparts = parse_url($url);
2834                 unset($urlparts['query']);
2835                 unset($urlparts['fragment']);
2836                 $url = Network::unparseURL($urlparts);
2837
2838                 // Remove media links to only search in embedded content
2839                 // @todo Check images for image link, audio for audio links, ...
2840                 if (in_array($type, [Post\Media::AUDIO, Post\Media::VIDEO, Post\Media::IMAGE])) {
2841                         $body = preg_replace("/\[url=[^\[\]]*\](.*)\[\/url\]/Usi", ' $1 ', $body);
2842                 }
2843
2844                 if (strpos($body, $url)) {
2845                         return true;
2846                 }
2847                 foreach ([0, 1, 2] as $size) {
2848                         if (preg_match('#/photo/.*-' . $size . '\.#ism', $url) &&
2849                                 strpos(preg_replace('#(/photo/.*)-[012]\.#ism', '$1-' . $size . '.', $body), $url)) {
2850                                 return true;
2851                         }
2852                 }
2853                 return false;
2854         }
2855
2856         /**
2857          * Replace visual attachments in the body
2858          *
2859          * @param array $attachments
2860          * @param string $body
2861          * @return string modified body
2862          */
2863         private static function replaceVisualAttachments(array $attachments, string $body)
2864         {
2865                 $stamp1 = microtime(true);
2866
2867                 foreach ($attachments['visual'] as $attachment) {
2868                         if (!empty($attachment['preview'])) {
2869                                 $body = str_replace($attachment['preview'], Post\Media::getPreviewUrlForId($attachment['id'], Proxy::SIZE_LARGE), $body);
2870                         } elseif ($attachment['filetype'] == 'image') {
2871                                 $body = str_replace($attachment['url'], Post\Media::getUrlForId($attachment['id']), $body);
2872                         }
2873                 }
2874                 DI::profiler()->saveTimestamp($stamp1, 'rendering');
2875                 return $body;
2876         }
2877
2878         /**
2879          * Add visual attachments to the content
2880          *
2881          * @param array $attachments
2882          * @param array $item
2883          * @param string $content
2884          * @return string modified content
2885          */
2886         private static function addVisualAttachments(array $attachments, array $item, string $content, bool $shared)
2887         {
2888                 $stamp1 = microtime(true);
2889                 $leading = '';
2890                 $trailing = '';
2891
2892                 // @todo In the future we should make a single for the template engine with all media in it. This allows more flexibilty.
2893                 foreach ($attachments['visual'] as $attachment) {
2894                         if (self::containsLink($item['body'], $attachment['preview'] ?? $attachment['url'], $attachment['type'])) {
2895                                 continue;
2896                         }
2897
2898                         if (!empty($attachment['preview'])) {
2899                                 $preview_url = Post\Media::getPreviewUrlForId($attachment['id'], Proxy::SIZE_LARGE);
2900                         } else {
2901                                 $preview_url = '';
2902                         }
2903
2904                         if (($attachment['filetype'] == 'video')) {
2905                                 /// @todo Move the template to /content as well
2906                                 $media = Renderer::replaceMacros(Renderer::getMarkupTemplate('video_top.tpl'), [
2907                                         '$video' => [
2908                                                 'id'      => $attachment['id'],
2909                                                 'src'     => $attachment['url'],
2910                                                 'name'    => $attachment['name'] ?: $attachment['url'],
2911                                                 'preview' => $preview_url,
2912                                                 'mime'    => $attachment['mimetype'],
2913                                         ],
2914                                 ]);
2915                                 if (($item['post-type'] ?? null) == Item::PT_VIDEO) {
2916                                         $leading .= $media;
2917                                 } else {
2918                                         $trailing .= $media;
2919                                 }
2920                         } elseif ($attachment['filetype'] == 'audio') {
2921                                 $media = Renderer::replaceMacros(Renderer::getMarkupTemplate('content/audio.tpl'), [
2922                                         '$audio' => [
2923                                                 'id'     => $attachment['id'],
2924                                                 'src'    => $attachment['url'],
2925                                                 'name'   => $attachment['name'] ?: $attachment['url'],
2926                                                 'mime'   => $attachment['mimetype'],
2927                                         ],
2928                                 ]);
2929                                 if (($item['post-type'] ?? null) == Item::PT_AUDIO) {
2930                                         $leading .= $media;
2931                                 } else {
2932                                         $trailing .= $media;
2933                                 }
2934                         } elseif ($attachment['filetype'] == 'image') {
2935                                 $media = Renderer::replaceMacros(Renderer::getMarkupTemplate('content/image.tpl'), [
2936                                         '$image' => [
2937                                                 'src'        => Post\Media::getUrlForId($attachment['id']),
2938                                                 'preview'    => Post\Media::getPreviewUrlForId($attachment['id'], ($attachment['width'] > $attachment['height']) ? Proxy::SIZE_MEDIUM : Proxy::SIZE_LARGE),
2939                                                 'attachment' => $attachment,
2940                                         ],
2941                                 ]);
2942                                 // On Diaspora posts the attached pictures are leading
2943                                 if ($item['network'] == Protocol::DIASPORA) {
2944                                         $leading .= $media;
2945                                 } else {
2946                                         $trailing .= $media;
2947                                 }
2948                         }
2949                 }
2950
2951                 if ($shared) {
2952                         $content = str_replace(BBCode::TOP_ANCHOR, '<div class="body-attach">' . $leading . '<div class="clear"></div></div>' . BBCode::TOP_ANCHOR, $content);
2953                         $content = str_replace(BBCode::BOTTOM_ANCHOR, '<div class="body-attach">' . $trailing . '<div class="clear"></div></div>' . BBCode::BOTTOM_ANCHOR, $content);
2954                 } else {
2955                         if ($leading != '') {
2956                                 $content = '<div class="body-attach">' . $leading . '<div class="clear"></div></div>' . $content;
2957                         }
2958
2959                         if ($trailing != '') {
2960                                 $content .= '<div class="body-attach">' . $trailing . '<div class="clear"></div></div>';
2961                         }
2962                 }
2963
2964                 DI::profiler()->saveTimestamp($stamp1, 'rendering');
2965                 return $content;
2966         }
2967
2968         /**
2969          * Add link attachment to the content
2970          *
2971          * @param array  $attachments
2972          * @param string $body
2973          * @param string $content
2974          * @param bool   $shared
2975          * @param array  $ignore_links A list of URLs to ignore
2976          * @return string modified content
2977          */
2978         private static function addLinkAttachment(int $uriid, array $attachments, string $body, string $content, bool $shared, array $ignore_links)
2979         {
2980                 $stamp1 = microtime(true);
2981                 // @ToDo Check only for audio and video
2982                 $preview = empty($attachments['visual']);
2983
2984                 if (!empty($attachments['link'])) {
2985                         foreach ($attachments['link'] as $link) {
2986                                 $found = false;
2987                                 foreach ($ignore_links as $ignore_link) {
2988                                         if (Strings::compareLink($link['url'], $ignore_link)) {
2989                                                 $found = true;
2990                                         }
2991                                 }
2992                                 // @todo Judge between the links to use the one with most information
2993                                 if (!$found && (empty($attachment) || !empty($link['author-name']) ||
2994                                         (empty($attachment['name']) && !empty($link['name'])) ||
2995                                         (empty($attachment['description']) && !empty($link['description'])) ||
2996                                         (empty($attachment['preview']) && !empty($link['preview'])))) {
2997                                         $attachment = $link;
2998                                 }
2999                         }
3000                 }
3001
3002                 if (!empty($attachment)) {
3003                         $data = [
3004                                 'after' => '',
3005                                 'author_name' => $attachment['author-name'] ?? '',
3006                                 'author_url' =>  $attachment['author-url'] ?? '',
3007                                 'description' => $attachment['description'] ?? '',
3008                                 'image' => '',
3009                                 'preview' => '',
3010                                 'provider_name' => $attachment['publisher-name'] ?? '',
3011                                 'provider_url' => $attachment['publisher-url'] ?? '',
3012                                 'text' => '',
3013                                 'title' => $attachment['name'] ?? '',
3014                                 'type' => 'link',
3015                                 'url' => $attachment['url']];
3016
3017                         if ($preview && !empty($attachment['preview'])) {
3018                                 if ($attachment['preview-width'] >= 500) {
3019                                         $data['image'] = Post\Media::getPreviewUrlForId($attachment['id'], Proxy::SIZE_MEDIUM);
3020                                 } else {
3021                                         $data['preview'] = Post\Media::getPreviewUrlForId($attachment['id'], Proxy::SIZE_MEDIUM);
3022                                 }
3023                         }
3024
3025                         if (!empty($data['description']) && !empty($content)) {
3026                                 similar_text($data['description'], $content, $percent);
3027                         } else {
3028                                 $percent = 0;
3029                         }
3030
3031                         if (!empty($data['description']) && (($data['title'] == $data['description']) || ($percent > 95) || (strpos($content, $data['description']) !== false))) {
3032                                 $data['description'] = '';
3033                         }
3034
3035                         if (($data['author_name'] ?? '') == ($data['provider_name'] ?? '')) {
3036                                 $data['author_name'] = '';
3037                         }
3038
3039                         if (($data['author_url'] ?? '') == ($data['provider_url'] ?? '')) {
3040                                 $data['author_url'] = '';
3041                         }
3042                 } elseif (preg_match("/.*(\[attachment.*?\].*?\[\/attachment\]).*/ism", $body, $match)) {
3043                         $data = BBCode::getAttachmentData($match[1]);
3044                 }
3045                 DI::profiler()->saveTimestamp($stamp1, 'rendering');
3046
3047                 if (isset($data['url']) && !in_array($data['url'], $ignore_links)) {
3048                         if (!empty($data['description']) || !empty($data['image']) || !empty($data['preview'])) {
3049                                 $parts = parse_url($data['url']);
3050                                 if (!empty($parts['scheme']) && !empty($parts['host'])) {
3051                                         if (empty($data['provider_name'])) {
3052                                                 $data['provider_name'] = $parts['host'];
3053                                         }
3054                                         if (empty($data['provider_url']) || empty(parse_url($data['provider_url'], PHP_URL_SCHEME))) {
3055                                                 $data['provider_url'] = $parts['scheme'] . '://' . $parts['host'];
3056
3057                                                 if (!empty($parts['port'])) {
3058                                                         $data['provider_url'] .= ':' . $parts['port'];
3059                                                 }
3060                                         }
3061                                 }
3062
3063                                 // @todo Use a template
3064                                 $rendered = BBCode::convertAttachment('', BBCode::INTERNAL, false, $data, $uriid);
3065                         } elseif (!self::containsLink($content, $data['url'], Post\Media::HTML)) {
3066                                 $rendered = Renderer::replaceMacros(Renderer::getMarkupTemplate('content/link.tpl'), [
3067                                         '$url'  => $data['url'],
3068                                         '$title' => $data['title'],
3069                                 ]);
3070                         } else {
3071                                 return $content;
3072                         }
3073
3074                         if ($shared) {
3075                                 return str_replace(BBCode::BOTTOM_ANCHOR, BBCode::BOTTOM_ANCHOR . $rendered, $content);
3076                         } else {
3077                                 return $content . $rendered;
3078                         }
3079                 }
3080                 return $content;
3081         }
3082
3083         /**
3084          * Add non visual attachments to the content
3085          *
3086          * @param array $attachments
3087          * @param array $item
3088          * @param string $content
3089          * @return string modified content
3090          */
3091         private static function addNonVisualAttachments(array $attachments, array $item, string $content)
3092         {
3093                 $stamp1 = microtime(true);
3094                 $trailing = '';
3095                 foreach ($attachments['additional'] as $attachment) {
3096                         if (strpos($item['body'], $attachment['url'])) {
3097                                 continue;
3098                         }
3099
3100                         $author = ['uid' => 0, 'id' => $item['author-id'],
3101                                 'network' => $item['author-network'], 'url' => $item['author-link']];
3102                         $the_url = Contact::magicLinkByContact($author, $attachment['url']);
3103
3104                         $title = Strings::escapeHtml(trim(($attachment['description'] ?? '') ?: $attachment['url']));
3105
3106                         if (!empty($attachment['size'])) {
3107                                 $title .= ' ' . $attachment['size'] . ' ' . DI::l10n()->t('bytes');
3108                         }
3109
3110                         /// @todo Use a template
3111                         $icon = '<div class="attachtype icon s22 type-' . $attachment['filetype'] . ' subtype-' . $attachment['subtype'] . '"></div>';
3112                         $trailing .= '<a href="' . strip_tags($the_url) . '" title="' . $title . '" class="attachlink" target="_blank" rel="noopener noreferrer" >' . $icon . '</a>';
3113                 }
3114
3115                 if ($trailing != '') {
3116                         $content .= '<div class="body-attach">' . $trailing . '<div class="clear"></div></div>';
3117                 }
3118
3119                 DI::profiler()->saveTimestamp($stamp1, 'rendering');
3120                 return $content;
3121         }
3122
3123         /**
3124          * get private link for item
3125          *
3126          * @param array $item
3127          * @return boolean|array False if item has not plink, otherwise array('href'=>plink url, 'title'=>translated title)
3128          * @throws \Exception
3129          */
3130         public static function getPlink($item)
3131         {
3132                 if (local_user()) {
3133                         $ret = [
3134                                 'href' => "display/" . $item['guid'],
3135                                 'orig' => "display/" . $item['guid'],
3136                                 'title' => DI::l10n()->t('View on separate page'),
3137                                 'orig_title' => DI::l10n()->t('View on separate page'),
3138                         ];
3139
3140                         if (!empty($item['plink'])) {
3141                                 $ret['href'] = DI::baseUrl()->remove($item['plink']);
3142                                 $ret['title'] = DI::l10n()->t('Link to source');
3143                         }
3144                 } elseif (!empty($item['plink']) && ($item['private'] != self::PRIVATE)) {
3145                         $ret = [
3146                                 'href' => $item['plink'],
3147                                 'orig' => $item['plink'],
3148                                 'title' => DI::l10n()->t('Link to source'),
3149                                 'orig_title' => DI::l10n()->t('Link to source'),
3150                         ];
3151                 } else {
3152                         $ret = [];
3153                 }
3154
3155                 return $ret;
3156         }
3157
3158         /**
3159          * Is the given item array a post that is sent as starting post to a forum?
3160          *
3161          * @param array $item
3162          * @param array $owner
3163          *
3164          * @return boolean "true" when it is a forum post
3165          */
3166         public static function isForumPost(array $item, array $owner = [])
3167         {
3168                 if (empty($owner)) {
3169                         $owner = User::getOwnerDataById($item['uid']);
3170                         if (empty($owner)) {
3171                                 return false;
3172                         }
3173                 }
3174
3175                 if (($item['author-id'] == $item['owner-id']) ||
3176                         ($owner['id'] == $item['contact-id']) ||
3177                         ($item['uri-id'] != $item['parent-uri-id']) ||
3178                         $item['origin']) {
3179                         return false;
3180                 }
3181
3182                 return Contact::isForum($item['contact-id']);
3183         }
3184
3185         /**
3186          * Search item id for given URI or plink
3187          *
3188          * @param string $uri
3189          * @param integer $uid
3190          *
3191          * @return integer item id
3192          */
3193         public static function searchByLink($uri, $uid = 0)
3194         {
3195                 $ssl_uri = str_replace('http://', 'https://', $uri);
3196                 $uris = [$uri, $ssl_uri, Strings::normaliseLink($uri)];
3197
3198                 $item = Post::selectFirst(['id'], ['uri' => $uris, 'uid' => $uid]);
3199                 if (DBA::isResult($item)) {
3200                         return $item['id'];
3201                 }
3202
3203                 $item = Post::selectFirst(['id'], ['plink' => $uris, 'uid' => $uid]);
3204                 if (DBA::isResult($item)) {
3205                         return $item['id'];
3206                 }
3207
3208                 return 0;
3209         }
3210
3211         /**
3212          * Return the URI for a link to the post
3213          *
3214          * @param string $uri URI or link to post
3215          *
3216          * @return string URI
3217          */
3218         public static function getURIByLink(string $uri)
3219         {
3220                 $ssl_uri = str_replace('http://', 'https://', $uri);
3221                 $uris = [$uri, $ssl_uri, Strings::normaliseLink($uri)];
3222
3223                 $item = Post::selectFirst(['uri'], ['uri' => $uris]);
3224                 if (DBA::isResult($item)) {
3225                         return $item['uri'];
3226                 }
3227
3228                 $item = Post::selectFirst(['uri'], ['plink' => $uris]);
3229                 if (DBA::isResult($item)) {
3230                         return $item['uri'];
3231                 }
3232
3233                 return '';
3234         }
3235
3236         /**
3237          * Fetches item for given URI or plink
3238          *
3239          * @param string $uri
3240          * @param integer $uid
3241          *
3242          * @return integer item id
3243          */
3244         public static function fetchByLink(string $uri, int $uid = 0)
3245         {
3246                 Logger::info('Trying to fetch link', ['uid' => $uid, 'uri' => $uri]);
3247                 $item_id = self::searchByLink($uri, $uid);
3248                 if (!empty($item_id)) {
3249                         Logger::info('Link found', ['uid' => $uid, 'uri' => $uri, 'id' => $item_id]);
3250                         return $item_id;
3251                 }
3252
3253                 if ($fetched_uri = ActivityPub\Processor::fetchMissingActivity($uri)) {
3254                         $item_id = self::searchByLink($fetched_uri, $uid);
3255                 } else {
3256                         $item_id = Diaspora::fetchByURL($uri);
3257                 }
3258
3259                 if (!empty($item_id)) {
3260                         Logger::info('Link fetched', ['uid' => $uid, 'uri' => $uri, 'id' => $item_id]);
3261                         return $item_id;
3262                 }
3263
3264                 Logger::info('Link not found', ['uid' => $uid, 'uri' => $uri]);
3265                 return 0;
3266         }
3267
3268         /**
3269          * Return share data from an item array (if the item is shared item)
3270          * We are providing the complete Item array, because at some time in the future
3271          * we hopefully will define these values not in the body anymore but in some item fields.
3272          * This function is meant to replace all similar functions in the system.
3273          *
3274          * @param array $item
3275          *
3276          * @return array with share information
3277          */
3278         public static function getShareArray($item)
3279         {
3280                 if (!preg_match("/(.*?)\[share(.*?)\]\s?(.*?)\s?\[\/share\]\s?/ism", $item['body'], $matches)) {
3281                         return [];
3282                 }
3283
3284                 $attribute_string = $matches[2];
3285                 $attributes = ['comment' => trim($matches[1]), 'shared' => trim($matches[3])];
3286                 foreach (['author', 'profile', 'avatar', 'guid', 'posted', 'link'] as $field) {
3287                         if (preg_match("/$field=(['\"])(.+?)\\1/ism", $attribute_string, $matches)) {
3288                                 $attributes[$field] = trim(html_entity_decode($matches[2] ?? '', ENT_QUOTES, 'UTF-8'));
3289                         }
3290                 }
3291                 return $attributes;
3292         }
3293
3294         /**
3295          * Fetch item information for shared items from the original items and adds it.
3296          *
3297          * @param array $item
3298          *
3299          * @return array item array with data from the original item
3300          */
3301         public static function addShareDataFromOriginal(array $item)
3302         {
3303                 $shared = self::getShareArray($item);
3304                 if (empty($shared)) {
3305                         return $item;
3306                 }
3307
3308                 // Real reshares always have got a GUID.
3309                 if (empty($shared['guid'])) {
3310                         return $item;
3311                 }
3312
3313                 $uid = $item['uid'] ?? 0;
3314
3315                 // first try to fetch the item via the GUID. This will work for all reshares that had been created on this system
3316                 $shared_item = Post::selectFirst(['title', 'body'], ['guid' => $shared['guid'], 'uid' => [0, $uid]]);
3317                 if (!DBA::isResult($shared_item)) {
3318                         if (empty($shared['link'])) {
3319                                 return $item;
3320                         }
3321
3322                         // Otherwhise try to find (and possibly fetch) the item via the link. This should work for Diaspora and ActivityPub posts
3323                         $id = self::fetchByLink($shared['link'] ?? '', $uid);
3324                         if (empty($id)) {
3325                                 Logger::info('Original item not found', ['url' => $shared['link'] ?? '', 'callstack' => System::callstack()]);
3326                                 return $item;
3327                         }
3328
3329                         $shared_item = Post::selectFirst(['title', 'body'], ['id' => $id]);
3330                         if (!DBA::isResult($shared_item)) {
3331                                 return $item;
3332                         }
3333                         Logger::info('Got shared data from url', ['url' => $shared['link'], 'callstack' => System::callstack()]);
3334                 } else {
3335                         Logger::info('Got shared data from guid', ['guid' => $shared['guid'], 'callstack' => System::callstack()]);
3336                 }
3337
3338                 if (!empty($shared_item['title'])) {
3339                         $body = '[h3]' . $shared_item['title'] . "[/h3]\n" . $shared_item['body'];
3340                         unset($shared_item['title']);
3341                 } else {
3342                         $body = $shared_item['body'];
3343                 }
3344
3345                 $item['body'] = preg_replace("/\[share ([^\[\]]*)\].*\[\/share\]/ism", '[share $1]' . $body . '[/share]', $item['body']);
3346                 unset($shared_item['body']);
3347
3348                 return array_merge($item, $shared_item);
3349         }
3350
3351         /**
3352          * Check a prospective item array against user-level permissions
3353          *
3354          * @param array $item Expected keys: uri, gravity, and
3355          *                    author-link if is author-id is set,
3356          *                    owner-link if is owner-id is set,
3357          *                    causer-link if is causer-id is set.
3358          * @param int   $user_id Local user ID
3359          * @return bool
3360          * @throws \Exception
3361          */
3362         protected static function isAllowedByUser(array $item, int $user_id)
3363         {
3364                 if (!empty($item['author-id']) && Contact\User::isBlocked($item['author-id'], $user_id)) {
3365                         Logger::notice('Author is blocked by user', ['author-link' => $item['author-link'], 'uid' => $user_id, 'item-uri' => $item['uri']]);
3366                         return false;
3367                 }
3368
3369                 if (!empty($item['owner-id']) && Contact\User::isBlocked($item['owner-id'], $user_id)) {
3370                         Logger::notice('Owner is blocked by user', ['owner-link' => $item['owner-link'], 'uid' => $user_id, 'item-uri' => $item['uri']]);
3371                         return false;
3372                 }
3373
3374                 // The causer is set during a thread completion, for example because of a reshare. It countains the responsible actor.
3375                 if (!empty($item['causer-id']) && Contact\User::isBlocked($item['causer-id'], $user_id)) {
3376                         Logger::notice('Causer is blocked by user', ['causer-link' => $item['causer-link'] ?? $item['causer-id'], 'uid' => $user_id, 'item-uri' => $item['uri']]);
3377                         return false;
3378                 }
3379
3380                 if (!empty($item['causer-id']) && ($item['gravity'] === GRAVITY_PARENT) && Contact\User::isIgnored($item['causer-id'], $user_id)) {
3381                         Logger::notice('Causer is ignored by user', ['causer-link' => $item['causer-link'] ?? $item['causer-id'], 'uid' => $user_id, 'item-uri' => $item['uri']]);
3382                         return false;
3383                 }
3384
3385                 return true;
3386         }
3387
3388         /**
3389          * Improve the data in shared posts
3390          *
3391          * @param array $item
3392          * @return string body
3393          */
3394         public static function improveSharedDataInBody(array $item)
3395         {
3396                 $shared = BBCode::fetchShareAttributes($item['body']);
3397                 if (empty($shared['link'])) {
3398                         return $item['body'];
3399                 }
3400
3401                 $id = self::fetchByLink($shared['link']);
3402                 Logger::info('Fetched shared post', ['uri-id' => $item['uri-id'], 'id' => $id, 'author' => $shared['profile'], 'url' => $shared['link'], 'guid' => $shared['guid'], 'callstack' => System::callstack()]);
3403                 if (!$id) {
3404                         return $item['body'];
3405                 }
3406
3407                 $shared_item = Post::selectFirst(['author-name', 'author-link', 'author-avatar', 'plink', 'created', 'guid', 'title', 'body'], ['id' => $id]);
3408                 if (!DBA::isResult($shared_item)) {
3409                         return $item['body'];
3410                 }
3411
3412                 $shared_content = BBCode::getShareOpeningTag($shared_item['author-name'], $shared_item['author-link'], $shared_item['author-avatar'], $shared_item['plink'], $shared_item['created'], $shared_item['guid']);
3413
3414                 if (!empty($shared_item['title'])) {
3415                         $shared_content .= '[h3]'.$shared_item['title'].'[/h3]'."\n";
3416                 }
3417
3418                 $shared_content .= $shared_item['body'];
3419
3420                 $item['body'] = preg_replace("/\[share.*?\](.*)\[\/share\]/ism", $shared_content . '[/share]', $item['body']);
3421                 Logger::info('New shared data', ['uri-id' => $item['uri-id'], 'id' => $id, 'shared_item' => $shared_item]);
3422                 return $item['body'];
3423         }
3424 }