src/Model/Item.php

   1 <?php
   2 /**
   3  * @copyright Copyright (C) 2010-2022, the Friendica project
   4  *
   5  * @license GNU AGPL version 3 or any later version
   6  *
   7  * This program is free software: you can redistribute it and/or modify
   8  * it under the terms of the GNU Affero General Public License as
   9  * published by the Free Software Foundation, either version 3 of the
  10  * License, or (at your option) any later version.
  11  *
  12  * This program is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  * GNU Affero General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU Affero General Public License
  18  * along with this program.  If not, see <https://www.gnu.org/licenses/>.
  19  *
  20  */
  21
  22 namespace Friendica\Model;
  23
  24 use Friendica\Content\Text\BBCode;
  25 use Friendica\Content\Text\HTML;
  26 use Friendica\Core\Hook;
  27 use Friendica\Core\Logger;
  28 use Friendica\Core\Protocol;
  29 use Friendica\Core\Renderer;
  30 use Friendica\Core\Session;
  31 use Friendica\Core\System;
  32 use Friendica\Model\Tag;
  33 use Friendica\Core\Worker;
  34 use Friendica\Database\DBA;
  35 use Friendica\DI;
  36 use Friendica\Model\Post;
  37 use Friendica\Protocol\Activity;
  38 use Friendica\Protocol\ActivityPub;
  39 use Friendica\Protocol\Diaspora;
  40 use Friendica\Util\DateTimeFormat;
  41 use Friendica\Util\Map;
  42 use Friendica\Util\Network;
  43 use Friendica\Util\Proxy;
  44 use Friendica\Util\Strings;
  45 use Friendica\Worker\Delivery;
  46 use LanguageDetection\Language;
  47
  48 class Item
  49 {
  50         // Posting types, inspired by https://www.w3.org/TR/activitystreams-vocabulary/#object-types
  51         const PT_ARTICLE = 0;
  52         const PT_NOTE = 1;
  53         const PT_PAGE = 2;
  54         const PT_IMAGE = 16;
  55         const PT_AUDIO = 17;
  56         const PT_VIDEO = 18;
  57         const PT_DOCUMENT = 19;
  58         const PT_EVENT = 32;
  59         const PT_POLL = 33;
  60         const PT_PERSONAL_NOTE = 128;
  61
  62         // Posting reasons (Why had a post been stored for a user?)
  63         const PR_NONE = 0;
  64         const PR_TAG = 64;
  65         const PR_TO = 65;
  66         const PR_CC = 66;
  67         const PR_BTO = 67;
  68         const PR_BCC = 68;
  69         const PR_FOLLOWER = 69;
  70         const PR_ANNOUNCEMENT = 70;
  71         const PR_COMMENT = 71;
  72         const PR_STORED = 72;
  73         const PR_GLOBAL = 73;
  74         const PR_RELAY = 74;
  75         const PR_FETCHED = 75;
  76
  77         // system.accept_only_sharer setting values
  78         const COMPLETION_NONE    = 1;
  79         const COMPLETION_COMMENT = 0;
  80         const COMPLETION_LIKE    = 2;
  81
  82         // Field list that is used to display the items
  83         const DISPLAY_FIELDLIST = [
  84                 'uid', 'id', 'parent', 'guid', 'network', 'gravity',
  85                 'uri-id', 'uri', 'thr-parent-id', 'thr-parent', 'parent-uri-id', 'parent-uri',
  86                 'commented', 'created', 'edited', 'received', 'verb', 'object-type', 'postopts', 'plink',
  87                 'wall', 'private', 'starred', 'origin', 'parent-origin', 'title', 'body', 'language',
  88                 'content-warning', 'location', 'coord', 'app', 'rendered-hash', 'rendered-html', 'object',
  89                 'allow_cid', 'allow_gid', 'deny_cid', 'deny_gid', 'mention', 'global',
  90                 'author-id', 'author-link', 'author-name', 'author-avatar', 'author-network',
  91                 'owner-id', 'owner-link', 'owner-name', 'owner-avatar', 'owner-network', 'owner-contact-type',
  92                 'causer-id', 'causer-link', 'causer-name', 'causer-avatar', 'causer-contact-type', 'causer-network',
  93                 'contact-id', 'contact-uid', 'contact-link', 'contact-name', 'contact-avatar',
  94                 'writable', 'self', 'cid', 'alias',
  95                 'event-created', 'event-edited', 'event-start', 'event-finish',
  96                 'event-summary', 'event-desc', 'event-location', 'event-type',
  97                 'event-nofinish', 'event-ignore', 'event-id',
  98                 'delivery_queue_count', 'delivery_queue_done', 'delivery_queue_failed'
  99         ];
 100
 101         // Field list that is used to deliver items via the protocols
 102         const DELIVER_FIELDLIST = ['uid', 'id', 'parent', 'uri-id', 'uri', 'thr-parent', 'parent-uri', 'guid',
 103                         'parent-guid', 'received', 'created', 'edited', 'verb', 'object-type', 'object', 'target',
 104                         'private', 'title', 'body', 'raw-body', 'location', 'coord', 'app',
 105                         'inform', 'deleted', 'extid', 'post-type', 'post-reason', 'gravity',
 106                         'allow_cid', 'allow_gid', 'deny_cid', 'deny_gid',
 107                         'author-id', 'author-link', 'author-name', 'author-avatar', 'owner-id', 'owner-link', 'contact-uid',
 108                         'signed_text', 'network', 'wall', 'contact-id', 'plink', 'origin',
 109                         'thr-parent-id', 'parent-uri-id', 'postopts', 'pubmail',
 110                         'event-created', 'event-edited', 'event-start', 'event-finish',
 111                         'event-summary', 'event-desc', 'event-location', 'event-type',
 112                         'event-nofinish', 'event-ignore', 'event-id'];
 113
 114         // All fields in the item table
 115         const ITEM_FIELDLIST = ['id', 'uid', 'parent', 'uri', 'parent-uri', 'thr-parent',
 116                         'guid', 'uri-id', 'parent-uri-id', 'thr-parent-id', 'vid',
 117                         'contact-id', 'wall', 'gravity', 'extid', 'psid',
 118                         'created', 'edited', 'commented', 'received', 'changed', 'verb',
 119                         'postopts', 'plink', 'resource-id', 'event-id', 'inform',
 120                         'allow_cid', 'allow_gid', 'deny_cid', 'deny_gid', 'post-type', 'post-reason',
 121                         'private', 'pubmail', 'visible', 'starred',
 122                         'unseen', 'deleted', 'origin', 'mention', 'global', 'network',
 123                         'title', 'content-warning', 'body', 'location', 'coord', 'app',
 124                         'rendered-hash', 'rendered-html', 'object-type', 'object', 'target-type', 'target',
 125                         'author-id', 'author-link', 'author-name', 'author-avatar', 'author-network',
 126                         'owner-id', 'owner-link', 'owner-name', 'owner-avatar', 'causer-id'];
 127
 128         // List of all verbs that don't need additional content data.
 129         // Never reorder or remove entries from this list. Just add new ones at the end, if needed.
 130         const ACTIVITIES = [
 131                 Activity::LIKE, Activity::DISLIKE,
 132                 Activity::ATTEND, Activity::ATTENDNO, Activity::ATTENDMAYBE,
 133                 Activity::FOLLOW,
 134                 Activity::ANNOUNCE];
 135
 136         const PUBLIC = 0;
 137         const PRIVATE = 1;
 138         const UNLISTED = 2;
 139
 140         /**
 141          * Update existing item entries
 142          *
 143          * @param array $fields    The fields that are to be changed
 144          * @param array $condition The condition for finding the item entries
 145          *
 146          * In the future we may have to change permissions as well.
 147          * Then we had to add the user id as third parameter.
 148          *
 149          * A return value of "0" doesn't mean an error - but that 0 rows had been changed.
 150          *
 151          * @return integer|boolean number of affected rows - or "false" if there was an error
 152          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 153          */
 154         public static function update(array $fields, array $condition)
 155         {
 156                 if (empty($condition) || empty($fields)) {
 157                         return false;
 158                 }
 159
 160                 if (isset($fields['extid'])) {
 161                         $fields['external-id'] = ItemURI::getIdByURI($fields['extid']);
 162                 }
 163
 164                 if (!empty($fields['verb'])) {
 165                         $fields['vid'] = Verb::getID($fields['verb']);
 166                 }
 167
 168                 if (!empty($fields['edited'])) {
 169                         $previous = Post::selectFirst(['edited'], $condition);
 170                 }
 171
 172                 $rows = Post::update($fields, $condition);
 173                 if (is_bool($rows)) {
 174                         return $rows;
 175                 }
 176
 177                 // We only need to call the line by line update for specific fields
 178                 if (empty($fields['body']) && empty($fields['file']) &&
 179                         empty($fields['attach']) && empty($fields['edited'])) {
 180                         return $rows;
 181                 }
 182
 183                 Logger::info('Updating per single row method', ['fields' => $fields, 'condition' => $condition]);
 184
 185                 $items = Post::select(['id', 'origin', 'uri-id', 'uid', 'author-network'], $condition);
 186
 187                 $notify_items = [];
 188
 189                 while ($item = DBA::fetch($items)) {
 190                         if (!empty($fields['body'])) {
 191                                 Post\Media::insertFromAttachmentData($item['uri-id'], $fields['body']);
 192
 193                                 $content_fields = ['raw-body' => trim($fields['raw-body'] ?? $fields['body'])];
 194
 195                                 // Remove all media attachments from the body and store them in the post-media table
 196                                 // @todo On shared postings (Diaspora style and commented reshare) don't fetch content from the shared part
 197                                 $content_fields['raw-body'] = Post\Media::insertFromBody($item['uri-id'], $content_fields['raw-body']);
 198                                 $content_fields['raw-body'] = self::setHashtags($content_fields['raw-body']);
 199
 200                                 if ($item['author-network'] != Protocol::DFRN) {
 201                                         Post\Media::insertFromRelevantUrl($item['uri-id'], $content_fields['raw-body']);
 202                                 }
 203
 204                                 Post\Content::update($item['uri-id'], $content_fields);
 205                         }
 206
 207                         if (!empty($fields['file'])) {
 208                                 Post\Category::storeTextByURIId($item['uri-id'], $item['uid'], $fields['file']);
 209                         }
 210
 211                         if (!empty($fields['attach'])) {
 212                                 Post\Media::insertFromAttachment($item['uri-id'], $fields['attach']);
 213                         }
 214
 215                         // We only need to notfiy others when it is an original entry from us.
 216                         // Only call the notifier when the item had been edited and records had been changed.
 217                         if ($item['origin'] && !empty($fields['edited']) && ($previous['edited'] != $fields['edited'])) {
 218                                 $notify_items[] = $item['id'];
 219                         }
 220                 }
 221
 222                 DBA::close($items);
 223
 224                 foreach ($notify_items as $notify_item) {
 225                         $post = Post::selectFirst(['uri-id', 'uid'], ['id' => $notify_item]);
 226                         Worker::add(PRIORITY_HIGH, "Notifier", Delivery::POST, (int)$post['uri-id'], (int)$post['uid']);
 227                 }
 228
 229                 return $rows;
 230         }
 231
 232         /**
 233          * Delete an item and notify others about it - if it was ours
 234          *
 235          * @param array   $condition The condition for finding the item entries
 236          * @param integer $priority  Priority for the notification
 237          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 238          */
 239         public static function markForDeletion($condition, $priority = PRIORITY_HIGH)
 240         {
 241                 $items = Post::select(['id'], $condition);
 242                 while ($item = Post::fetch($items)) {
 243                         self::markForDeletionById($item['id'], $priority);
 244                 }
 245                 DBA::close($items);
 246         }
 247
 248         /**
 249          * Delete an item for an user and notify others about it - if it was ours
 250          *
 251          * @param array   $condition The condition for finding the item entries
 252          * @param integer $uid       User who wants to delete this item
 253          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 254          */
 255         public static function deleteForUser($condition, $uid)
 256         {
 257                 if ($uid == 0) {
 258                         return;
 259                 }
 260
 261                 $items = Post::select(['id', 'uid', 'uri-id'], $condition);
 262                 while ($item = Post::fetch($items)) {
 263                         if (in_array($item['uid'], [$uid, 0])) {
 264                                 Post\User::update($item['uri-id'], $uid, ['hidden' => true], true);
 265                                 Post\ThreadUser::update($item['uri-id'], $uid, ['hidden' => true], true);
 266                         }
 267
 268                         if ($item['uid'] == $uid) {
 269                                 self::markForDeletionById($item['id'], PRIORITY_HIGH);
 270                         } elseif ($item['uid'] != 0) {
 271                                 Logger::notice('Wrong ownership. Not deleting item', ['id' => $item['id']]);
 272                         }
 273                 }
 274                 DBA::close($items);
 275         }
 276
 277         /**
 278          * Mark an item for deletion, delete related data and notify others about it - if it was ours
 279          *
 280          * @param integer $item_id
 281          * @param integer $priority Priority for the notification
 282          *
 283          * @return boolean success
 284          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 285          */
 286         public static function markForDeletionById($item_id, $priority = PRIORITY_HIGH)
 287         {
 288                 Logger::info('Mark item for deletion by id', ['id' => $item_id, 'callstack' => System::callstack()]);
 289                 // locate item to be deleted
 290                 $fields = ['id', 'uri', 'uri-id', 'uid', 'parent', 'parent-uri-id', 'origin',
 291                         'deleted', 'resource-id', 'event-id',
 292                         'verb', 'object-type', 'object', 'target', 'contact-id', 'psid', 'gravity'];
 293                 $item = Post::selectFirst($fields, ['id' => $item_id]);
 294                 if (!DBA::isResult($item)) {
 295                         Logger::info('Item not found.', ['id' => $item_id]);
 296                         return false;
 297                 }
 298
 299                 if ($item['deleted']) {
 300                         Logger::info('Item has already been marked for deletion.', ['id' => $item_id]);
 301                         return false;
 302                 }
 303
 304                 $parent = Post::selectFirst(['origin'], ['id' => $item['parent']]);
 305                 if (!DBA::isResult($parent)) {
 306                         $parent = ['origin' => false];
 307                 }
 308
 309                 // clean up categories and tags so they don't end up as orphans
 310                 Post\Category::deleteByURIId($item['uri-id'], $item['uid']);
 311
 312                 /*
 313                  * If item is a link to a photo resource, nuke all the associated photos
 314                  * (visitors will not have photo resources)
 315                  * This only applies to photos uploaded from the photos page. Photos inserted into a post do not
 316                  * generate a resource-id and therefore aren't intimately linked to the item.
 317                  */
 318                 /// @TODO: this should first check if photo is used elsewhere
 319                 if (strlen($item['resource-id'])) {
 320                         Photo::delete(['resource-id' => $item['resource-id'], 'uid' => $item['uid']]);
 321                 }
 322
 323                 // If item is a link to an event, delete the event.
 324                 if (intval($item['event-id'])) {
 325                         Event::delete($item['event-id']);
 326                 }
 327
 328                 // If item has attachments, drop them
 329                 $attachments = Post\Media::getByURIId($item['uri-id'], [Post\Media::DOCUMENT]);
 330                 foreach($attachments as $attachment) {
 331                         if (preg_match("|attach/(\d+)|", $attachment['url'], $matches)) {
 332                                 Attach::delete(['id' => $matches[1], 'uid' => $item['uid']]);
 333                         }
 334                 }
 335
 336                 // Set the item to "deleted"
 337                 $item_fields = ['deleted' => true, 'edited' => DateTimeFormat::utcNow(), 'changed' => DateTimeFormat::utcNow()];
 338                 Post::update($item_fields, ['id' => $item['id']]);
 339
 340                 Post\Category::storeTextByURIId($item['uri-id'], $item['uid'], '');
 341
 342                 if (!Post::exists(["`uri-id` = ? AND `uid` != 0 AND NOT `deleted`", $item['uri-id']])) {
 343                         self::markForDeletion(['uri-id' => $item['uri-id'], 'uid' => 0, 'deleted' => false], $priority);
 344                 }
 345
 346                 Post\DeliveryData::delete($item['uri-id']);
 347
 348                 // If it's the parent of a comment thread, kill all the kids
 349                 if ($item['gravity'] == GRAVITY_PARENT) {
 350                         self::markForDeletion(['parent' => $item['parent'], 'deleted' => false], $priority);
 351                 }
 352
 353                 // Is it our comment and/or our thread?
 354                 if (($item['origin'] || $parent['origin']) && ($item['uid'] != 0)) {
 355                         // When we delete the original post we will delete all existing copies on the server as well
 356                         self::markForDeletion(['uri-id' => $item['uri-id'], 'deleted' => false], $priority);
 357
 358                         // send the notification upstream/downstream
 359                         if ($priority) {
 360                                 Worker::add(['priority' => $priority, 'dont_fork' => true], "Notifier", Delivery::DELETION, (int)$item['uri-id'], (int)$item['uid']);
 361                         }
 362                 } elseif ($item['uid'] != 0) {
 363                         Post\User::update($item['uri-id'], $item['uid'], ['hidden' => true]);
 364                         Post\ThreadUser::update($item['uri-id'], $item['uid'], ['hidden' => true]);
 365                 }
 366
 367                 Logger::info('Item has been marked for deletion.', ['id' => $item_id]);
 368
 369                 return true;
 370         }
 371
 372         public static function guid($item, $notify)
 373         {
 374                 if (!empty($item['guid'])) {
 375                         return trim($item['guid']);
 376                 }
 377
 378                 if ($notify) {
 379                         // We have to avoid duplicates. So we create the GUID in form of a hash of the plink or uri.
 380                         // We add the hash of our own host because our host is the original creator of the post.
 381                         $prefix_host = DI::baseUrl()->getHostname();
 382                 } else {
 383                         $prefix_host = '';
 384
 385                         // We are only storing the post so we create a GUID from the original hostname.
 386                         if (!empty($item['author-link'])) {
 387                                 $parsed = parse_url($item['author-link']);
 388                                 if (!empty($parsed['host'])) {
 389                                         $prefix_host = $parsed['host'];
 390                                 }
 391                         }
 392
 393                         if (empty($prefix_host) && !empty($item['plink'])) {
 394                                 $parsed = parse_url($item['plink']);
 395                                 if (!empty($parsed['host'])) {
 396                                         $prefix_host = $parsed['host'];
 397                                 }
 398                         }
 399
 400                         if (empty($prefix_host) && !empty($item['uri'])) {
 401                                 $parsed = parse_url($item['uri']);
 402                                 if (!empty($parsed['host'])) {
 403                                         $prefix_host = $parsed['host'];
 404                                 }
 405                         }
 406
 407                         // Is it in the format data@host.tld? - Used for mail contacts
 408                         if (empty($prefix_host) && !empty($item['author-link']) && strstr($item['author-link'], '@')) {
 409                                 $mailparts = explode('@', $item['author-link']);
 410                                 $prefix_host = array_pop($mailparts);
 411                         }
 412                 }
 413
 414                 if (!empty($item['plink'])) {
 415                         $guid = self::guidFromUri($item['plink'], $prefix_host);
 416                 } elseif (!empty($item['uri'])) {
 417                         $guid = self::guidFromUri($item['uri'], $prefix_host);
 418                 } else {
 419                         $guid = System::createUUID(hash('crc32', $prefix_host));
 420                 }
 421
 422                 return $guid;
 423         }
 424
 425         private static function contactId($item)
 426         {
 427                 if (!empty($item['contact-id']) && DBA::exists('contact', ['self' => true, 'id' => $item['contact-id']])) {
 428                         return $item['contact-id'];
 429                 } elseif (($item['gravity'] == GRAVITY_PARENT) && !empty($item['uid']) && !empty($item['contact-id']) && Contact::isSharing($item['contact-id'], $item['uid'])) {
 430                         return $item['contact-id'];
 431                 } elseif (!empty($item['uid']) && !Contact::isSharing($item['author-id'], $item['uid'])) {
 432                         return $item['author-id'];
 433                 } elseif (!empty($item['contact-id'])) {
 434                         return $item['contact-id'];
 435                 } else {
 436                         $contact_id = Contact::getIdForURL($item['author-link'], $item['uid']);
 437                         if (!empty($contact_id)) {
 438                                 return $contact_id;
 439                         }
 440                 }
 441                 return $item['author-id'];
 442         }
 443
 444         /**
 445          * Write an item array into a spool file to be inserted later.
 446          * This command is called whenever there are issues storing an item.
 447          *
 448          * @param array $item The item fields that are to be inserted
 449          * @throws \Exception
 450          */
 451         private static function spool($orig_item)
 452         {
 453                 // Now we store the data in the spool directory
 454                 // We use "microtime" to keep the arrival order and "mt_rand" to avoid duplicates
 455                 $file = 'item-' . round(microtime(true) * 10000) . '-' . mt_rand() . '.msg';
 456
 457                 $spoolpath = System::getSpoolPath();
 458                 if ($spoolpath != "") {
 459                         $spool = $spoolpath . '/' . $file;
 460
 461                         file_put_contents($spool, json_encode($orig_item));
 462                         Logger::warning("Item wasn't stored - Item was spooled into file", ['file' => $file]);
 463                 }
 464         }
 465
 466         /**
 467          * Check if the item array is a duplicate
 468          *
 469          * @param array $item
 470          * @return boolean is it a duplicate?
 471          */
 472         private static function isDuplicate(array $item)
 473         {
 474                 // Checking if there is already an item with the same guid
 475                 $condition = ['guid' => $item['guid'], 'network' => $item['network'], 'uid' => $item['uid']];
 476                 if (Post::exists($condition)) {
 477                         Logger::notice('Found already existing item', $condition);
 478                         return true;
 479                 }
 480
 481                 $condition = ['uri-id' => $item['uri-id'], 'uid' => $item['uid'],
 482                         'network' => [$item['network'], Protocol::DFRN]];
 483                 if (Post::exists($condition)) {
 484                         Logger::notice('duplicated item with the same uri found.', $condition);
 485                         return true;
 486                 }
 487
 488                 // On Friendica and Diaspora the GUID is unique
 489                 if (in_array($item['network'], [Protocol::DFRN, Protocol::DIASPORA])) {
 490                         $condition = ['guid' => $item['guid'], 'uid' => $item['uid']];
 491                         if (Post::exists($condition)) {
 492                                 Logger::notice('duplicated item with the same guid found.', $condition);
 493                                 return true;
 494                         }
 495                 } elseif ($item['network'] == Protocol::OSTATUS) {
 496                         // Check for an existing post with the same content. There seems to be a problem with OStatus.
 497                         $condition = ["`body` = ? AND `network` = ? AND `created` = ? AND `contact-id` = ? AND `uid` = ?",
 498                                         $item['body'], $item['network'], $item['created'], $item['contact-id'], $item['uid']];
 499                         if (Post::exists($condition)) {
 500                                 Logger::notice('duplicated item with the same body found.', $item);
 501                                 return true;
 502                         }
 503                 }
 504
 505                 /*
 506                  * Check for already added items.
 507                  * There is a timing issue here that sometimes creates double postings.
 508                  * An unique index would help - but the limitations of MySQL (maximum size of index values) prevent this.
 509                  */
 510                 if (($item['uid'] == 0) && Post::exists(['uri-id' => $item['uri-id'], 'uid' => 0])) {
 511                         Logger::notice('Global item already stored.', ['uri-id' => $item['uri-id'], 'network' => $item['network']]);
 512                         return true;
 513                 }
 514
 515                 return false;
 516         }
 517
 518         /**
 519          * Check if the item array is valid
 520          *
 521          * @param array $item
 522          * @return boolean item is valid
 523          */
 524         public static function isValid(array $item)
 525         {
 526                 // When there is no content then we don't post it
 527                 if (($item['body'] . $item['title'] == '') && (empty($item['uri-id']) || !Post\Media::existsByURIId($item['uri-id']))) {
 528                         Logger::notice('No body, no title.');
 529                         return false;
 530                 }
 531
 532                 if (!empty($item['uid'])) {
 533                         $owner = User::getOwnerDataById($item['uid'], false);
 534                         if (!$owner) {
 535                                 Logger::notice('Missing item user owner data', ['uid' => $item['uid']]);
 536                                 return false;
 537                         }
 538
 539                         if ($owner['account_expired'] || $owner['account_removed']) {
 540                                 Logger::notice('Item user has been deleted/expired/removed', ['uid' => $item['uid'], 'deleted' => $owner['deleted'], 'account_expired' => $owner['account_expired'], 'account_removed' => $owner['account_removed']]);
 541                                 return false;
 542                         }
 543                 }
 544
 545                 if (!empty($item['author-id']) && Contact::isBlocked($item['author-id'])) {
 546                         Logger::notice('Author is blocked node-wide', ['author-link' => $item['author-link'], 'item-uri' => $item['uri']]);
 547                         return false;
 548                 }
 549
 550                 if (!empty($item['author-link']) && Network::isUrlBlocked($item['author-link'])) {
 551                         Logger::notice('Author server is blocked', ['author-link' => $item['author-link'], 'item-uri' => $item['uri']]);
 552                         return false;
 553                 }
 554
 555                 if (!empty($item['owner-id']) && Contact::isBlocked($item['owner-id'])) {
 556                         Logger::notice('Owner is blocked node-wide', ['owner-link' => $item['owner-link'], 'item-uri' => $item['uri']]);
 557                         return false;
 558                 }
 559
 560                 if (!empty($item['owner-link']) && Network::isUrlBlocked($item['owner-link'])) {
 561                         Logger::notice('Owner server is blocked', ['owner-link' => $item['owner-link'], 'item-uri' => $item['uri']]);
 562                         return false;
 563                 }
 564
 565                 if (!empty($item['uid']) && !self::isAllowedByUser($item, $item['uid'])) {
 566                         return false;
 567                 }
 568
 569                 if ($item['verb'] == Activity::FOLLOW) {
 570                         if (!$item['origin'] && ($item['author-id'] == Contact::getPublicIdByUserId($item['uid']))) {
 571                                 // Our own follow request can be relayed to us. We don't store it to avoid notification chaos.
 572                                 Logger::info("Follow: Don't store not origin follow request", ['parent-uri' => $item['parent-uri']]);
 573                                 return false;
 574                         }
 575
 576                         $condition = ['verb' => Activity::FOLLOW, 'uid' => $item['uid'],
 577                                 'parent-uri' => $item['parent-uri'], 'author-id' => $item['author-id']];
 578                         if (Post::exists($condition)) {
 579                                 // It happens that we receive multiple follow requests by the same author - we only store one.
 580                                 Logger::info('Follow: Found existing follow request from author', ['author-id' => $item['author-id'], 'parent-uri' => $item['parent-uri']]);
 581                                 return false;
 582                         }
 583                 }
 584
 585                 return true;
 586         }
 587
 588         /**
 589          * Check if the item array is too old
 590          *
 591          * @param array $item
 592          * @return boolean item is too old
 593          */
 594         public static function isTooOld(array $item)
 595         {
 596                 // check for create date and expire time
 597                 $expire_interval = DI::config()->get('system', 'dbclean-expire-days', 0);
 598
 599                 $user = DBA::selectFirst('user', ['expire'], ['uid' => $item['uid']]);
 600                 if (DBA::isResult($user) && ($user['expire'] > 0) && (($user['expire'] < $expire_interval) || ($expire_interval == 0))) {
 601                         $expire_interval = $user['expire'];
 602                 }
 603
 604                 if (($expire_interval > 0) && !empty($item['created'])) {
 605                         $expire_date = time() - ($expire_interval * 86400);
 606                         $created_date = strtotime($item['created']);
 607                         if ($created_date < $expire_date) {
 608                                 Logger::notice('Item created before expiration interval.', [
 609                                         'created' => date('c', $created_date),
 610                                         'expired' => date('c', $expire_date),
 611                                         '$item' => $item
 612                                 ]);
 613                                 return true;
 614                         }
 615                 }
 616
 617                 return false;
 618         }
 619
 620         /**
 621          * Return the id of the given item array if it has been stored before
 622          *
 623          * @param array $item
 624          * @return integer item id
 625          */
 626         private static function getDuplicateID(array $item)
 627         {
 628                 if (empty($item['network']) || in_array($item['network'], Protocol::FEDERATED)) {
 629                         $condition = ["`uri-id` = ? AND `uid` = ? AND `network` IN (?, ?, ?, ?)",
 630                                 $item['uri-id'], $item['uid'],
 631                                 Protocol::ACTIVITYPUB, Protocol::DIASPORA, Protocol::DFRN, Protocol::OSTATUS];
 632                         $existing = Post::selectFirst(['id', 'network'], $condition);
 633                         if (DBA::isResult($existing)) {
 634                                 // We only log the entries with a different user id than 0. Otherwise we would have too many false positives
 635                                 if ($item['uid'] != 0) {
 636                                         Logger::notice('Item already existed for user', [
 637                                                 'uri-id' => $item['uri-id'],
 638                                                 'uid' => $item['uid'],
 639                                                 'network' => $item['network'],
 640                                                 'existing_id' => $existing["id"],
 641                                                 'existing_network' => $existing["network"]
 642                                         ]);
 643                                 }
 644
 645                                 return $existing["id"];
 646                         }
 647                 }
 648                 return 0;
 649         }
 650
 651         /**
 652          * Fetch top-level parent data for the given item array
 653          *
 654          * @param array $item
 655          * @return array item array with parent data
 656          * @throws \Exception
 657          */
 658         private static function getTopLevelParent(array $item)
 659         {
 660                 $fields = ['uid', 'uri', 'parent-uri', 'id', 'deleted',
 661                         'uri-id', 'parent-uri-id',
 662                         'allow_cid', 'allow_gid', 'deny_cid', 'deny_gid',
 663                         'wall', 'private', 'origin', 'author-id'];
 664                 $condition = ['uri-id' => $item['thr-parent-id'], 'uid' => $item['uid']];
 665                 $params = ['order' => ['id' => false]];
 666                 $parent = Post::selectFirst($fields, $condition, $params);
 667
 668                 if (!DBA::isResult($parent) && $item['origin']) {
 669                         $stored = Item::storeForUserByUriId($item['thr-parent-id'], $item['uid']);
 670                         Logger::info('Stored thread parent item for user', ['uri-id' => $item['thr-parent-id'], 'uid' => $item['uid'], 'stored' => $stored]);
 671                         $parent = Post::selectFirst($fields, $condition, $params);
 672                 }
 673
 674                 if (!DBA::isResult($parent)) {
 675                         Logger::notice('item parent was not found - ignoring item', ['thr-parent-id' => $item['thr-parent-id'], 'uid' => $item['uid']]);
 676                         return [];
 677                 }
 678
 679                 if ($parent['uri-id'] == $parent['parent-uri-id']) {
 680                         return $parent;
 681                 }
 682
 683                 $condition = ['uri-id' => $parent['parent-uri-id'],
 684                         'parent-uri-id' => $parent['parent-uri-id'],
 685                         'uid' => $parent['uid']];
 686                 $params = ['order' => ['id' => false]];
 687                 $toplevel_parent = Post::selectFirst($fields, $condition, $params);
 688
 689                 if (!DBA::isResult($toplevel_parent) && $item['origin']) {
 690                         $stored = Item::storeForUserByUriId($item['parent-uri-id'], $item['uid']);
 691                         Logger::info('Stored parent item for user', ['uri-id' => $item['parent-uri-id'], 'uid' => $item['uid'], 'stored' => $stored]);
 692                         $toplevel_parent = Post::selectFirst($fields, $condition, $params);
 693                 }
 694
 695                 if (!DBA::isResult($toplevel_parent)) {
 696                         Logger::notice('item top level parent was not found - ignoring item', ['parent-uri-id' => $parent['parent-uri-id'], 'uid' => $parent['uid']]);
 697                         return [];
 698                 }
 699
 700                 return $toplevel_parent;
 701         }
 702
 703         /**
 704          * Get the gravity for the given item array
 705          *
 706          * @param array $item
 707          * @return integer gravity
 708          */
 709         private static function getGravity(array $item)
 710         {
 711                 $activity = DI::activity();
 712
 713                 if (isset($item['gravity'])) {
 714                         return intval($item['gravity']);
 715                 } elseif ($item['parent-uri-id'] === $item['uri-id']) {
 716                         return GRAVITY_PARENT;
 717                 } elseif ($activity->match($item['verb'], Activity::POST)) {
 718                         return GRAVITY_COMMENT;
 719                 } elseif ($activity->match($item['verb'], Activity::FOLLOW)) {
 720                         return GRAVITY_ACTIVITY;
 721                 } elseif ($activity->match($item['verb'], Activity::ANNOUNCE)) {
 722                         return GRAVITY_ACTIVITY;
 723                 }
 724                 Logger::info('Unknown gravity for verb', ['verb' => $item['verb']]);
 725                 return GRAVITY_UNKNOWN;   // Should not happen
 726         }
 727
 728         public static function insert(array $item, bool $notify = false, bool $post_local = true)
 729         {
 730                 $orig_item = $item;
 731
 732                 $priority = PRIORITY_HIGH;
 733
 734                 // If it is a posting where users should get notifications, then define it as wall posting
 735                 if ($notify) {
 736                         $item['wall'] = 1;
 737                         $item['origin'] = 1;
 738                         $item['network'] = Protocol::DFRN;
 739                         $item['protocol'] = Conversation::PARCEL_DIRECT;
 740                         $item['direction'] = Conversation::PUSH;
 741
 742                         if (in_array($notify, PRIORITIES)) {
 743                                 $priority = $notify;
 744                         }
 745                 } else {
 746                         $item['network'] = trim(($item['network'] ?? '') ?: Protocol::PHANTOM);
 747                 }
 748
 749                 $uid = intval($item['uid']);
 750
 751                 $item['guid'] = self::guid($item, $notify);
 752                 $item['uri'] = substr(trim($item['uri'] ?? '') ?: self::newURI($item['uid'], $item['guid']), 0, 255);
 753
 754                 // Store URI data
 755                 $item['uri-id'] = ItemURI::insert(['uri' => $item['uri'], 'guid' => $item['guid']]);
 756
 757                 // Backward compatibility: parent-uri used to be the direct parent uri.
 758                 // If it is provided without a thr-parent, it probably is the old behavior.
 759                 $item['thr-parent'] = trim($item['thr-parent'] ?? $item['parent-uri'] ?? $item['uri']);
 760                 $item['parent-uri'] = $item['thr-parent'];
 761
 762                 $item['thr-parent-id'] = $item['parent-uri-id'] = ItemURI::getIdByURI($item['thr-parent']);
 763
 764                 // Store conversation data
 765                 $item = Conversation::insert($item);
 766
 767                 /*
 768                  * Do we already have this item?
 769                  * We have to check several networks since Friendica posts could be repeated
 770                  * via OStatus (maybe Diasporsa as well)
 771                  */
 772                 $duplicate = self::getDuplicateID($item);
 773                 if ($duplicate) {
 774                         return $duplicate;
 775                 }
 776
 777                 // Additional duplicate checks
 778                 /// @todo Check why the first duplication check returns the item number and the second a 0
 779                 if (self::isDuplicate($item)) {
 780                         return 0;
 781                 }
 782
 783                 if (!isset($item['post-type'])) {
 784                         $item['post-type'] = empty($item['title']) ? self::PT_NOTE : self::PT_ARTICLE;
 785                 }
 786
 787                 $item['wall']          = intval($item['wall'] ?? 0);
 788                 $item['extid']         = trim($item['extid'] ?? '');
 789                 $item['author-name']   = trim($item['author-name'] ?? '');
 790                 $item['author-link']   = trim($item['author-link'] ?? '');
 791                 $item['author-avatar'] = trim($item['author-avatar'] ?? '');
 792                 $item['owner-name']    = trim($item['owner-name'] ?? '');
 793                 $item['owner-link']    = trim($item['owner-link'] ?? '');
 794                 $item['owner-avatar']  = trim($item['owner-avatar'] ?? '');
 795                 $item['received']      = (isset($item['received'])  ? DateTimeFormat::utc($item['received'])  : DateTimeFormat::utcNow());
 796                 $item['created']       = (isset($item['created'])   ? DateTimeFormat::utc($item['created'])   : $item['received']);
 797                 $item['edited']        = (isset($item['edited'])    ? DateTimeFormat::utc($item['edited'])    : $item['created']);
 798                 $item['changed']       = (isset($item['changed'])   ? DateTimeFormat::utc($item['changed'])   : $item['created']);
 799                 $item['commented']     = (isset($item['commented']) ? DateTimeFormat::utc($item['commented']) : $item['created']);
 800                 $item['title']         = substr(trim($item['title'] ?? ''), 0, 255);
 801                 $item['location']      = trim($item['location'] ?? '');
 802                 $item['coord']         = trim($item['coord'] ?? '');
 803                 $item['visible']       = (isset($item['visible']) ? intval($item['visible']) : 1);
 804                 $item['deleted']       = 0;
 805                 $item['verb']          = trim($item['verb'] ?? '');
 806                 $item['object-type']   = trim($item['object-type'] ?? '');
 807                 $item['object']        = trim($item['object'] ?? '');
 808                 $item['target-type']   = trim($item['target-type'] ?? '');
 809                 $item['target']        = trim($item['target'] ?? '');
 810                 $item['plink']         = substr(trim($item['plink'] ?? ''), 0, 255);
 811                 $item['allow_cid']     = trim($item['allow_cid'] ?? '');
 812                 $item['allow_gid']     = trim($item['allow_gid'] ?? '');
 813                 $item['deny_cid']      = trim($item['deny_cid'] ?? '');
 814                 $item['deny_gid']      = trim($item['deny_gid'] ?? '');
 815                 $item['private']       = intval($item['private'] ?? self::PUBLIC);
 816                 $item['body']          = trim($item['body'] ?? '');
 817                 $item['raw-body']      = trim($item['raw-body'] ?? $item['body']);
 818                 $item['app']           = trim($item['app'] ?? '');
 819                 $item['origin']        = intval($item['origin'] ?? 0);
 820                 $item['postopts']      = trim($item['postopts'] ?? '');
 821                 $item['resource-id']   = trim($item['resource-id'] ?? '');
 822                 $item['event-id']      = intval($item['event-id'] ?? 0);
 823                 $item['inform']        = trim($item['inform'] ?? '');
 824                 $item['file']          = trim($item['file'] ?? '');
 825
 826                 // Communities aren't working with the Diaspora protoccol
 827                 if (($uid != 0) && ($item['network'] == Protocol::DIASPORA)) {
 828                         $user = User::getById($uid, ['account-type']);
 829                         if ($user['account-type'] == Contact::TYPE_COMMUNITY) {
 830                                 Logger::info('Community posts are not supported via Diaspora');
 831                                 return 0;
 832                         }
 833                 }
 834
 835                 // Items cannot be stored before they happen ...
 836                 if ($item['created'] > DateTimeFormat::utcNow()) {
 837                         $item['created'] = DateTimeFormat::utcNow();
 838                 }
 839
 840                 // We haven't invented time travel by now.
 841                 if ($item['edited'] > DateTimeFormat::utcNow()) {
 842                         $item['edited'] = DateTimeFormat::utcNow();
 843                 }
 844
 845                 $item['plink'] = ($item['plink'] ?? '') ?: DI::baseUrl() . '/display/' . urlencode($item['guid']);
 846
 847                 $item['gravity'] = self::getGravity($item);
 848
 849                 $item['language'] = self::getLanguage($item);
 850
 851                 $default = ['url' => $item['author-link'], 'name' => $item['author-name'],
 852                         'photo' => $item['author-avatar'], 'network' => $item['network']];
 853                 $item['author-id'] = ($item['author-id'] ?? 0) ?: Contact::getIdForURL($item['author-link'], 0, null, $default);
 854
 855                 $default = ['url' => $item['owner-link'], 'name' => $item['owner-name'],
 856                         'photo' => $item['owner-avatar'], 'network' => $item['network']];
 857                 $item['owner-id'] = ($item['owner-id'] ?? 0) ?: Contact::getIdForURL($item['owner-link'], 0, null, $default);
 858
 859                 $actor = ($item['gravity'] == GRAVITY_PARENT) ? $item['owner-id'] : $item['author-id'];
 860                 if (!$item['origin'] && ($item['uid'] != 0) && Contact::isSharing($actor, $item['uid'])) {
 861                         $item['post-reason'] = self::PR_FOLLOWER;
 862                 }
 863
 864                 // Ensure that there is an avatar cache
 865                 Contact::checkAvatarCache($item['author-id']);
 866                 Contact::checkAvatarCache($item['owner-id']);
 867
 868                 // The contact-id should be set before "self::insert" was called - but there seems to be issues sometimes
 869                 $item["contact-id"] = self::contactId($item);
 870
 871                 if (!empty($item['direction']) && in_array($item['direction'], [Conversation::PUSH, Conversation::RELAY]) &&
 872                         self::isTooOld($item)) {
 873                         Logger::info('Item is too old', ['item' => $item]);
 874                         return 0;
 875                 }
 876
 877                 if (!self::isValid($item)) {
 878                         return 0;
 879                 }
 880
 881                 if ($item['gravity'] !== GRAVITY_PARENT) {
 882                         $toplevel_parent = self::getTopLevelParent($item);
 883                         if (empty($toplevel_parent)) {
 884                                 return 0;
 885                         }
 886
 887                         // If the thread originated from this node, we check the permission against the thread starter
 888                         $condition = ['uri-id' => $toplevel_parent['uri-id'], 'wall' => true];
 889                         $localTopLevelParent = Post::selectFirst(['uid'], $condition);
 890                         if (!empty($localTopLevelParent['uid']) && !self::isAllowedByUser($item, $localTopLevelParent['uid'])) {
 891                                 return 0;
 892                         }
 893
 894                         $parent_id             = $toplevel_parent['id'];
 895                         $item['parent-uri']    = $toplevel_parent['uri'];
 896                         $item['parent-uri-id'] = $toplevel_parent['uri-id'];
 897                         $item['deleted']       = $toplevel_parent['deleted'];
 898
 899                         // Reshares have to keep their permissions to allow forums to work
 900                         if (!$item['origin'] || ($item['verb'] != Activity::ANNOUNCE)) {
 901                                 $item['allow_cid']     = $toplevel_parent['allow_cid'];
 902                                 $item['allow_gid']     = $toplevel_parent['allow_gid'];
 903                                 $item['deny_cid']      = $toplevel_parent['deny_cid'];
 904                                 $item['deny_gid']      = $toplevel_parent['deny_gid'];
 905                         }
 906
 907                         $parent_origin         = $toplevel_parent['origin'];
 908
 909                         // Don't federate received participation messages
 910                         if ($item['verb'] != Activity::FOLLOW) {
 911                                 $item['wall'] = $toplevel_parent['wall'];
 912                         } else {
 913                                 $item['wall'] = false;
 914                                 // Participations are technical messages, so they are set to "seen" automatically
 915                                 $item['unseen'] = false;
 916                         }
 917
 918                         /*
 919                          * If the parent is private, force privacy for the entire conversation
 920                          * This differs from the above settings as it subtly allows comments from
 921                          * email correspondents to be private even if the overall thread is not.
 922                          */
 923                         if ($toplevel_parent['private']) {
 924                                 $item['private'] = $toplevel_parent['private'];
 925                         }
 926
 927                         // If its a post that originated here then tag the thread as "mention"
 928                         if ($item['origin'] && $item['uid']) {
 929                                 DBA::update('post-thread-user', ['mention' => true], ['uri-id' => $item['parent-uri-id'], 'uid' => $item['uid']]);
 930                                 Logger::info('tagged thread as mention', ['parent' => $parent_id, 'parent-uri-id' => $item['parent-uri-id'], 'uid' => $item['uid']]);
 931                         }
 932
 933                         // Update the contact relations
 934                         Contact\Relation::store($toplevel_parent['author-id'], $item['author-id'], $item['created']);
 935                 } else {
 936                         $parent_id = 0;
 937                         $parent_origin = $item['origin'];
 938                 }
 939
 940                 $item['parent-uri-id'] = ItemURI::getIdByURI($item['parent-uri']);
 941                 $item['thr-parent-id'] = ItemURI::getIdByURI($item['thr-parent']);
 942
 943                 // Is this item available in the global items (with uid=0)?
 944                 if ($item["uid"] == 0) {
 945                         $item["global"] = true;
 946
 947                         // Set the global flag on all items if this was a global item entry
 948                         Post::update(['global' => true], ['uri-id' => $item['uri-id']]);
 949                 } else {
 950                         $item['global'] = Post::exists(['uid' => 0, 'uri-id' => $item['uri-id']]);
 951                 }
 952
 953                 // ACL settings
 954                 if (!empty($item["allow_cid"] . $item["allow_gid"] . $item["deny_cid"] . $item["deny_gid"])) {
 955                         $item["private"] = self::PRIVATE;
 956                 }
 957
 958                 if ($notify && $post_local) {
 959                         $item['edit'] = false;
 960                         $item['parent'] = $parent_id;
 961
 962                         // Trigger automatic reactions for addons
 963                         if (!isset($item['api_source'])) {
 964                                 $item['api_source'] = true;
 965                         }
 966
 967                         // We have to tell the hooks who we are - this really should be improved
 968                         if (!local_user()) {
 969                                 $_SESSION['authenticated'] = true;
 970                                 $_SESSION['uid'] = $uid;
 971                                 $dummy_session = true;
 972                         } else {
 973                                 $dummy_session = false;
 974                         }
 975
 976                         Hook::callAll('post_local', $item);
 977
 978                         if ($dummy_session) {
 979                                 unset($_SESSION['authenticated']);
 980                                 unset($_SESSION['uid']);
 981                         }
 982                 } elseif (!$notify) {
 983                         Hook::callAll('post_remote', $item);
 984                 }
 985
 986                 if (!empty($item['cancel'])) {
 987                         Logger::notice('post cancelled by addon.');
 988                         return 0;
 989                 }
 990
 991                 if (empty($item['vid']) && !empty($item['verb'])) {
 992                         $item['vid'] = Verb::getID($item['verb']);
 993                 }
 994
 995                 // Creates or assigns the permission set
 996                 $item['psid'] = DI::permissionSet()->selectOrCreate(
 997                         DI::permissionSetFactory()->createFromString(
 998                                 $item['uid'],
 999                                 $item['allow_cid'],
1000                                 $item['allow_gid'],
1001                                 $item['deny_cid'],
1002                                 $item['deny_gid']
1003                 ))->id;
1004
1005                 if (!empty($item['extid'])) {
1006                         $item['external-id'] = ItemURI::getIdByURI($item['extid']);
1007                 }
1008
1009                 if ($item['verb'] == Activity::ANNOUNCE) {
1010                         self::setOwnerforResharedItem($item);
1011                 }
1012
1013                 if (isset($item['attachments'])) {
1014                         foreach ($item['attachments'] as $attachment) {
1015                                 $attachment['uri-id'] = $item['uri-id'];
1016                                 Post\Media::insert($attachment);
1017                         }
1018                         unset($item['attachments']);
1019                 }
1020
1021                 Post\Media::insertFromAttachmentData($item['uri-id'], $item['body']);
1022
1023                 // Remove all media attachments from the body and store them in the post-media table
1024                 $item['raw-body'] = Post\Media::insertFromBody($item['uri-id'], $item['raw-body']);
1025                 $item['raw-body'] = self::setHashtags($item['raw-body']);
1026
1027                 if (!DBA::exists('contact', ['id' => $item['author-id'], 'network' => Protocol::DFRN])) {
1028                         Post\Media::insertFromRelevantUrl($item['uri-id'], $item['raw-body']);
1029                 }
1030
1031                 // Check for hashtags in the body and repair or add hashtag links
1032                 $item['body'] = self::setHashtags($item['body']);
1033
1034                 if (stristr($item['verb'], Activity::POKE)) {
1035                         $notify_type = Delivery::POKE;
1036                 } else {
1037                         $notify_type = Delivery::POST;
1038                 }
1039
1040                 // Filling item related side tables
1041                 if (!empty($item['attach'])) {
1042                         Post\Media::insertFromAttachment($item['uri-id'], $item['attach']);
1043                 }
1044
1045                 if (empty($item['event-id'])) {
1046                         unset($item['event-id']);
1047
1048                         $ev = Event::fromBBCode($item['body']);
1049                         if ((!empty($ev['desc']) || !empty($ev['summary'])) && !empty($ev['start'])) {
1050                                 Logger::info('Event found.');
1051                                 $ev['cid']       = $item['contact-id'];
1052                                 $ev['uid']       = $item['uid'];
1053                                 $ev['uri']       = $item['uri'];
1054                                 $ev['edited']    = $item['edited'];
1055                                 $ev['private']   = $item['private'];
1056                                 $ev['guid']      = $item['guid'];
1057                                 $ev['plink']     = $item['plink'];
1058                                 $ev['network']   = $item['network'];
1059                                 $ev['protocol']  = $item['protocol'] ?? Conversation::PARCEL_UNKNOWN;
1060                                 $ev['direction'] = $item['direction'] ?? Conversation::UNKNOWN;
1061                                 $ev['source']    = $item['source'] ?? '';
1062
1063                                 $event = DBA::selectFirst('event', ['id'], ['uri' => $item['uri'], 'uid' => $item['uid']]);
1064                                 if (DBA::isResult($event)) {
1065                                         $ev['id'] = $event['id'];
1066                                 }
1067
1068                                 $event_id = Event::store($ev);
1069                                 $item = Event::getItemArrayForImportedId($event_id, $item);
1070
1071                                 Logger::info('Event was stored', ['id' => $event_id]);
1072                         }
1073                 }
1074
1075                 if (empty($item['causer-id'])) {
1076                         unset($item['causer-id']);
1077                 }
1078
1079                 if (in_array($item['network'], [Protocol::ACTIVITYPUB, Protocol::DFRN])) {
1080                         $content_warning = BBCode::getAbstract($item['body'], Protocol::ACTIVITYPUB);
1081                         if (!empty($content_warning) && empty($item['content-warning'])) {
1082                                 $item['content-warning'] = $content_warning;
1083                         }
1084                 }
1085
1086                 Post::insert($item['uri-id'], $item);
1087
1088                 if ($item['gravity'] == GRAVITY_PARENT) {
1089                         Post\Thread::insert($item['uri-id'], $item);
1090                 }
1091
1092                 if (!in_array($item['verb'], self::ACTIVITIES)) {
1093                         Post\Content::insert($item['uri-id'], $item);
1094                 }
1095
1096                 // Create Diaspora signature
1097                 if ($item['origin'] && empty($item['diaspora_signed_text']) && ($item['gravity'] != GRAVITY_PARENT)) {
1098                         $signed = Diaspora::createCommentSignature($item);
1099                         if (!empty($signed)) {
1100                                 $item['diaspora_signed_text'] = json_encode($signed);
1101                         }
1102                 }
1103
1104                 if (!empty($item['diaspora_signed_text'])) {
1105                         DBA::replace('diaspora-interaction', ['uri-id' => $item['uri-id'], 'interaction' => $item['diaspora_signed_text']]);
1106                 }
1107
1108                 // Attached file links
1109                 if (!empty($item['file'])) {
1110                         Post\Category::storeTextByURIId($item['uri-id'], $item['uid'], $item['file']);
1111                 }
1112
1113                 // Delivery relevant data
1114                 $delivery_data = Post\DeliveryData::extractFields($item);
1115
1116                 if (!empty($item['origin']) || !empty($item['wall']) || !empty($delivery_data['postopts']) || !empty($delivery_data['inform'])) {
1117                         Post\DeliveryData::insert($item['uri-id'], $delivery_data);
1118                 }
1119
1120                 // Store tags from the body if this hadn't been handled previously in the protocol classes
1121                 if (!Tag::existsForPost($item['uri-id'])) {
1122                         Tag::storeFromBody($item['uri-id'], $item['body']);
1123                 }
1124
1125                 $condition = ['uri-id' => $item['uri-id'], 'uid' => $item['uid']];
1126                 if (Post::exists($condition)) {
1127                         Logger::notice('Item is already inserted - aborting', $condition);
1128                         return 0;
1129                 }
1130
1131                 $post_user_id = Post\User::insert($item['uri-id'], $item['uid'], $item);
1132                 if (!$post_user_id) {
1133                         Logger::notice('Post-User is already inserted - aborting', ['uid' => $item['uid'], 'uri-id' => $item['uri-id']]);
1134                         return 0;
1135                 }
1136
1137                 if ($item['gravity'] == GRAVITY_PARENT) {
1138                         $item['post-user-id'] = $post_user_id;
1139                         Post\ThreadUser::insert($item['uri-id'], $item['uid'], $item);
1140                 }
1141
1142                 Logger::notice('created item', ['post-id' => $post_user_id, 'uid' => $item['uid'], 'network' => $item['network'], 'uri-id' => $item['uri-id'], 'guid' => $item['guid']]);
1143
1144                 $posted_item = Post::selectFirst(self::ITEM_FIELDLIST, ['post-user-id' => $post_user_id]);
1145                 if (!DBA::isResult($posted_item)) {
1146                         // On failure store the data into a spool file so that the "SpoolPost" worker can try again later.
1147                         Logger::warning('Could not store item. it will be spooled', ['id' => $post_user_id]);
1148                         self::spool($orig_item);
1149                         return 0;
1150                 }
1151
1152                 // update the commented timestamp on the parent
1153                 if (DI::config()->get('system', 'like_no_comment')) {
1154                         // Update when it is a comment
1155                         $update_commented = in_array($posted_item['gravity'], [GRAVITY_PARENT, GRAVITY_COMMENT]);
1156                 } else {
1157                         // Update when it isn't a follow or tag verb
1158                         $update_commented = !in_array($posted_item['verb'], [Activity::FOLLOW, Activity::TAG]);
1159                 }
1160
1161                 if ($update_commented) {
1162                         $fields = ['commented' => DateTimeFormat::utcNow(), 'changed' => DateTimeFormat::utcNow()];
1163                 } else {
1164                         $fields = ['changed' => DateTimeFormat::utcNow()];
1165                 }
1166
1167                 Post::update($fields, ['uri-id' => $posted_item['parent-uri-id'], 'uid' => $posted_item['uid']]);
1168
1169                 // In that function we check if this is a forum post. Additionally we delete the item under certain circumstances
1170                 if (self::tagDeliver($posted_item['uid'], $post_user_id)) {
1171                         // Get the user information for the logging
1172                         $user = User::getById($uid);
1173
1174                         Logger::notice('Item had been deleted', ['id' => $post_user_id, 'user' => $uid, 'account-type' => $user['account-type']]);
1175                         return 0;
1176                 }
1177
1178                 if ($notify) {
1179                         if (!\Friendica\Content\Feature::isEnabled($posted_item['uid'], 'explicit_mentions') && ($posted_item['gravity'] == GRAVITY_COMMENT)) {
1180                                 Tag::createImplicitMentions($posted_item['uri-id'], $posted_item['thr-parent-id']);
1181                         }
1182                         Hook::callAll('post_local_end', $posted_item);
1183                 } else {
1184                         Hook::callAll('post_remote_end', $posted_item);
1185                 }
1186
1187                 if ($posted_item['gravity'] === GRAVITY_PARENT) {
1188                         self::addShadow($post_user_id);
1189                 } else {
1190                         self::addShadowPost($post_user_id);
1191                 }
1192
1193                 self::updateContact($posted_item);
1194
1195                 Post\UserNotification::setNotification($posted_item['uri-id'], $posted_item['uid']);
1196
1197                 // Distribute items to users who subscribed to their tags
1198                 self::distributeByTags($posted_item);
1199
1200                 // Automatically reshare the item if the "remote_self" option is selected
1201                 self::autoReshare($posted_item);
1202
1203                 $transmit = $notify || ($posted_item['visible'] && ($parent_origin || $posted_item['origin']));
1204
1205                 if ($transmit) {
1206                         // Don't relay participation messages
1207                         if (($posted_item['verb'] == Activity::FOLLOW) &&
1208                                 (!$posted_item['origin'] || ($posted_item['author-id'] != Contact::getPublicIdByUserId($uid)))) {
1209                                 Logger::info('Participation messages will not be relayed', ['item' => $posted_item['id'], 'uri' => $posted_item['uri'], 'verb' => $posted_item['verb']]);
1210                                 $transmit = false;
1211                         }
1212                 }
1213
1214                 if ($transmit) {
1215                         Worker::add(['priority' => $priority, 'dont_fork' => true], 'Notifier', $notify_type, (int)$posted_item['uri-id'], (int)$posted_item['uid']);
1216                 }
1217
1218                 return $post_user_id;
1219         }
1220
1221         /**
1222          * Change the owner of a parent item if it had been shared by a forum
1223          *
1224          * (public) forum posts in the new format consist of the regular post by the author
1225          * followed by an announce message sent from the forum account.
1226          * Changing the owner helps in grouping forum posts.
1227          *
1228          * @param array $item
1229          * @return void
1230          */
1231         private static function setOwnerforResharedItem(array $item)
1232         {
1233                 $parent = Post::selectFirst(['id', 'causer-id', 'owner-id', 'author-id', 'author-link', 'origin', 'post-reason'],
1234                         ['uri-id' => $item['thr-parent-id'], 'uid' => $item['uid']]);
1235                 if (!DBA::isResult($parent)) {
1236                         Logger::error('Parent not found', ['uri-id' => $item['thr-parent-id'], 'uid' => $item['uid']]);
1237                         return;
1238                 }
1239
1240                 $author = Contact::selectFirst(['url', 'contact-type', 'network'], ['id' => $item['author-id']]);
1241                 if (!DBA::isResult($author)) {
1242                         Logger::error('Author not found', ['id' => $item['author-id']]);
1243                         return;
1244                 }
1245
1246                 $self_contact = Contact::selectFirst(['id'], ['uid' => $item['uid'], 'self' => true]);
1247                 $self = !empty($self_contact) ? $self_contact['id'] : 0;
1248
1249                 $cid = Contact::getIdForURL($author['url'], $item['uid']);
1250                 if (empty($cid) || (!Contact::isSharing($cid, $item['uid']) && ($cid != $self))) {
1251                         Logger::info('The resharer is not a following contact: quit', ['resharer' => $author['url'], 'uid' => $item['uid'], 'cid' => $cid]);
1252                         return;
1253                 }
1254
1255                 if ($author['contact-type'] != Contact::TYPE_COMMUNITY) {
1256                         if ($parent['post-reason'] == self::PR_ANNOUNCEMENT) {
1257                                 Logger::info('The parent is already marked as announced: quit', ['causer' => $parent['causer-id'], 'owner' => $parent['owner-id'], 'author' => $parent['author-id'], 'uid' => $item['uid']]);
1258                                 return;
1259                         }
1260
1261                         if (Contact::isSharing($parent['owner-id'], $item['uid'])) {
1262                                 Logger::info('The resharer is no forum: quit', ['resharer' => $item['author-id'], 'owner' => $parent['owner-id'], 'author' => $parent['author-id'], 'uid' => $item['uid']]);
1263                                 return;
1264                         }
1265                 }
1266
1267                 self::update(['post-reason' => self::PR_ANNOUNCEMENT, 'causer-id' => $item['author-id']], ['id' => $parent['id']]);
1268                 Logger::info('Set announcement post-reason', ['uri-id' => $item['uri-id'], 'thr-parent-id' => $item['thr-parent-id'], 'uid' => $item['uid']]);
1269         }
1270
1271         /**
1272          * Distribute the given item to users who subscribed to their tags
1273          *
1274          * @param array $item     Processed item
1275          */
1276         private static function distributeByTags(array $item)
1277         {
1278                 if (($item['uid'] != 0) || ($item['gravity'] != GRAVITY_PARENT) || !in_array($item['network'], Protocol::FEDERATED)) {
1279                         return;
1280                 }
1281
1282                 $uids = Tag::getUIDListByURIId($item['uri-id']);
1283                 foreach ($uids as $uid) {
1284                         if (Contact::isSharing($item['author-id'], $uid)) {
1285                                 $fields = [];
1286                         } else {
1287                                 $fields = ['post-reason' => self::PR_TAG];
1288                         }
1289
1290                         $stored = self::storeForUserByUriId($item['uri-id'], $uid, $fields);
1291                         Logger::info('Stored item for users', ['uri-id' => $item['uri-id'], 'uid' => $uid, 'fields' => $fields, 'stored' => $stored]);
1292                 }
1293         }
1294
1295         /**
1296          * Distributes public items to the receivers
1297          *
1298          * @param integer $itemid      Item ID that should be added
1299          * @param string  $signed_text Original text (for Diaspora signatures), JSON encoded.
1300          * @throws \Exception
1301          */
1302         public static function distribute($itemid, $signed_text = '')
1303         {
1304                 $condition = ["`id` IN (SELECT `parent` FROM `post-user-view` WHERE `id` = ?)", $itemid];
1305                 $parent = Post::selectFirst(['owner-id'], $condition);
1306                 if (!DBA::isResult($parent)) {
1307                         Logger::warning('Item not found', ['condition' => $condition]);
1308                         return;
1309                 }
1310
1311                 // Only distribute public items from native networks
1312                 $condition = ['id' => $itemid, 'uid' => 0,
1313                         'network' => array_merge(Protocol::FEDERATED ,['']),
1314                         'visible' => true, 'deleted' => false, 'private' => [self::PUBLIC, self::UNLISTED]];
1315                 $item = Post::selectFirst(self::ITEM_FIELDLIST, $condition);
1316                 if (!DBA::isResult($item)) {
1317                         Logger::warning('Item not found', ['condition' => $condition]);
1318                         return;
1319                 }
1320
1321                 $origin = $item['origin'];
1322
1323                 $users = [];
1324
1325                 /// @todo add a field "pcid" in the contact table that referrs to the public contact id.
1326                 $owner = DBA::selectFirst('contact', ['url', 'nurl', 'alias'], ['id' => $parent['owner-id']]);
1327                 if (!DBA::isResult($owner)) {
1328                         return;
1329                 }
1330
1331                 $condition = ['nurl' => $owner['nurl'], 'rel' => [Contact::SHARING, Contact::FRIEND]];
1332                 $contacts = DBA::select('contact', ['uid'], $condition);
1333                 while ($contact = DBA::fetch($contacts)) {
1334                         if ($contact['uid'] == 0) {
1335                                 continue;
1336                         }
1337
1338                         $users[$contact['uid']] = $contact['uid'];
1339                 }
1340                 DBA::close($contacts);
1341
1342                 $condition = ['alias' => $owner['url'], 'rel' => [Contact::SHARING, Contact::FRIEND]];
1343                 $contacts = DBA::select('contact', ['uid'], $condition);
1344                 while ($contact = DBA::fetch($contacts)) {
1345                         if ($contact['uid'] == 0) {
1346                                 continue;
1347                         }
1348
1349                         $users[$contact['uid']] = $contact['uid'];
1350                 }
1351                 DBA::close($contacts);
1352
1353                 if (!empty($owner['alias'])) {
1354                         $condition = ['nurl' => Strings::normaliseLink($owner['alias']), 'rel' => [Contact::SHARING, Contact::FRIEND]];
1355                         $contacts = DBA::select('contact', ['uid'], $condition);
1356                         while ($contact = DBA::fetch($contacts)) {
1357                                 if ($contact['uid'] == 0) {
1358                                         continue;
1359                                 }
1360
1361                                 $users[$contact['uid']] = $contact['uid'];
1362                         }
1363                         DBA::close($contacts);
1364                 }
1365
1366                 $origin_uid = 0;
1367
1368                 if ($item['uri-id'] != $item['parent-uri-id']) {
1369                         $parents = Post::select(['uid', 'origin'], ["`uri-id` = ? AND `uid` != 0", $item['parent-uri-id']]);
1370                         while ($parent = Post::fetch($parents)) {
1371                                 $users[$parent['uid']] = $parent['uid'];
1372                                 if ($parent['origin'] && !$origin) {
1373                                         $origin_uid = $parent['uid'];
1374                                 }
1375                         }
1376                         DBA::close($parents);
1377                 }
1378
1379                 foreach ($users as $uid) {
1380                         if ($origin_uid == $uid) {
1381                                 $item['diaspora_signed_text'] = $signed_text;
1382                         }
1383                         self::storeForUser($item, $uid);
1384                 }
1385         }
1386
1387         /**
1388          * Store a public item defined by their URI-ID for the given users
1389          *
1390          * @param integer $uri_id     URI-ID of the given item
1391          * @param integer $uid        The user that will receive the item entry
1392          * @param array   $fields     Additional fields to be stored
1393          * @param integer $source_uid User id of the source post
1394          * @return integer stored item id
1395          */
1396         public static function storeForUserByUriId(int $uri_id, int $uid, array $fields = [], int $source_uid = 0)
1397         {
1398                 if ($uid == $source_uid) {
1399                         Logger::warning('target UID must not be be equal to the source UID', ['uri-id' => $uri_id, 'uid' => $uid]);
1400                         return 0;
1401                 }
1402
1403                 $item = Post::selectFirst(self::ITEM_FIELDLIST, ['uri-id' => $uri_id, 'uid' => $source_uid]);
1404                 if (!DBA::isResult($item)) {
1405                         Logger::warning('Item could not be fetched', ['uri-id' => $uri_id, 'uid' => $source_uid]);
1406                         return 0;
1407                 }
1408
1409                 if (($source_uid == 0) && (($item['private'] == self::PRIVATE) || !in_array($item['network'], Protocol::FEDERATED))) {
1410                         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']]);
1411                         return 0;
1412                 }
1413
1414                 $item['post-reason'] = self::PR_STORED;
1415
1416                 $item = array_merge($item, $fields);
1417
1418                 $is_reshare = ($item['gravity'] == GRAVITY_ACTIVITY) && ($item['verb'] == Activity::ANNOUNCE);
1419
1420                 if ((($item['gravity'] == GRAVITY_PARENT) || $is_reshare) &&
1421                         DI::pConfig()->get($uid, 'system', 'accept_only_sharer') == self::COMPLETION_NONE &&
1422                         !Contact::isSharingByURL($item['author-link'], $uid) &&
1423                         !Contact::isSharingByURL($item['owner-link'], $uid)) {
1424                         Logger::info('Contact is not a follower, thread will not be stored', ['author' => $item['author-link'], 'uid' => $uid]);
1425                         return 0;
1426                 }
1427
1428                 if ((($item['gravity'] == GRAVITY_COMMENT) || $is_reshare) && !Post::exists(['uri-id' => $item['thr-parent-id'], 'uid' => $uid])) {
1429                         // Fetch the origin user for the post
1430                         $origin_uid = self::GetOriginUidForUriId($item['thr-parent-id'], $uid);
1431                         if (is_null($origin_uid)) {
1432                                 Logger::info('Origin item was not found', ['uid' => $uid, 'uri-id' => $item['thr-parent-id']]);
1433                                 return 0;
1434                         }
1435
1436                         $causer = $item['causer-id'] ?: $item['author-id'];
1437                         $result = self::storeForUserByUriId($item['thr-parent-id'], $uid, ['causer-id' => $causer, 'post-reason' => self::PR_FETCHED], $origin_uid);
1438                         Logger::info('Fetched thread parent', ['uri-id' => $item['thr-parent-id'], 'uid' => $uid, 'causer' => $causer, 'result' => $result]);
1439                 }
1440
1441                 $stored = self::storeForUser($item, $uid);
1442                 Logger::info('Item stored for user', ['uri-id' => $item['uri-id'], 'uid' => $uid, 'source-uid' => $source_uid, 'stored' => $stored]);
1443                 return $stored;
1444         }
1445
1446         /**
1447          * Returns the origin uid of a post if the given user is allowed to see it.
1448          *
1449          * @param int $uriid
1450          * @param int $uid
1451          * @return int
1452          */
1453         private static function GetOriginUidForUriId(int $uriid, int $uid)
1454         {
1455                 if (Post::exists(['uri-id' => $uriid, 'uid' => $uid])) {
1456                         return $uid;
1457                 }
1458
1459                 $post = Post::selectFirst(['uid', 'allow_cid', 'allow_gid', 'deny_cid', 'deny_gid', 'private'], ['uri-id' => $uriid, 'origin' => true]);
1460                 if (!empty($post)) {
1461                         if (in_array($post['private'], [Item::PUBLIC, Item::UNLISTED])) {
1462                                 return $post['uid'];
1463                         }
1464
1465                         $pcid = Contact::getPublicIdByUserId($uid);
1466                         if (empty($pcid)) {
1467                                 return null;
1468                         }
1469
1470                         foreach (Item::enumeratePermissions($post, true) as $receiver) {
1471                                 if ($receiver == $pcid) {
1472                                         return $post['uid'];
1473                                 }
1474                         }
1475
1476                         return null;
1477                 }
1478
1479                 if (Post::exists(['uri-id' => $uriid, 'uid' => 0])) {
1480                         return 0;
1481                 }
1482
1483                 // When the post belongs to a a forum then all forum users are allowed to access it
1484                 foreach (Tag::getByURIId($uriid, [Tag::MENTION, Tag::EXCLUSIVE_MENTION]) as $tag) {
1485                         if (DBA::exists('contact', ['uid' => $uid, 'nurl' => Strings::normaliseLink($tag['url']), 'contact-type' => Contact::TYPE_COMMUNITY])) {
1486                                 $target_uid = User::getIdForURL($tag['url']);
1487                                 if (!empty($target_uid)) {
1488                                         return $target_uid;
1489                                 }
1490                         }
1491                 }
1492
1493                 return null;
1494         }
1495
1496         /**
1497          * Store a public item array for the given users
1498          *
1499          * @param array   $item   The item entry that will be stored
1500          * @param integer $uid    The user that will receive the item entry
1501          * @return integer stored item id
1502          * @throws \Exception
1503          */
1504         private static function storeForUser(array $item, int $uid)
1505         {
1506                 if (Post::exists(['uri-id' => $item['uri-id'], 'uid' => $uid])) {
1507                         if (!empty($item['event-id'])) {
1508                                 $post = Post::selectFirst(['event-id'], ['uri-id' => $item['uri-id'], 'uid' => $uid]);
1509                                 if (!empty($post['event-id'])) {
1510                                         $event = DBA::selectFirst('event', ['edited', 'start', 'finish', 'summary', 'desc', 'location', 'nofinish', 'adjust'], ['id' => $item['event-id']]);
1511                                         if (!empty($event)) {
1512                                                 // We aren't using "Event::store" here, since we don't want to trigger any further action
1513                                                 $ret = DBA::update('event', $event, ['id' => $post['event-id']]);
1514                                                 Logger::info('Event updated', ['uid' => $uid, 'source-event' => $item['event-id'], 'target-event' => $post['event-id'], 'ret' => $ret]);
1515                                         }
1516                                 }
1517                         }
1518                         Logger::info('Item already exists', ['uri-id' => $item['uri-id'], 'uid' => $uid]);
1519                         return 0;
1520                 }
1521
1522                 // Data from the "post-user" table
1523                 unset($item['id']);
1524                 unset($item['mention']);
1525                 unset($item['starred']);
1526                 unset($item['unseen']);
1527                 unset($item['psid']);
1528                 unset($item['pinned']);
1529                 unset($item['ignored']);
1530                 unset($item['pubmail']);
1531                 unset($item['event-id']);
1532                 unset($item['hidden']);
1533                 unset($item['notification-type']);
1534                 unset($item['post-reason']);
1535
1536                 // Data from the "post-delivery-data" table
1537                 unset($item['postopts']);
1538                 unset($item['inform']);
1539
1540                 $item['uid'] = $uid;
1541                 $item['origin'] = 0;
1542                 $item['wall'] = 0;
1543
1544                 if ($item['gravity'] == GRAVITY_PARENT) {
1545                         $contact = Contact::getByURLForUser($item['owner-link'], $uid, false, ['id']);
1546                 } else {
1547                         $contact = Contact::getByURLForUser($item['author-link'], $uid, false, ['id']);
1548                 }
1549
1550                 if (!empty($contact['id'])) {
1551                         $item['contact-id'] = $contact['id'];
1552                 } else {
1553                         // Shouldn't happen at all
1554                         Logger::warning('contact-id could not be fetched', ['uid' => $uid, 'item' => $item]);
1555                         $self = DBA::selectFirst('contact', ['id'], ['self' => true, 'uid' => $uid]);
1556                         if (!DBA::isResult($self)) {
1557                                 // Shouldn't happen even less
1558                                 Logger::warning('self contact could not be fetched', ['uid' => $uid, 'item' => $item]);
1559                                 return 0;
1560                         }
1561                         $item['contact-id'] = $self['id'];
1562                 }
1563
1564                 $notify = false;
1565                 if ($item['gravity'] == GRAVITY_PARENT) {
1566                         $contact = DBA::selectFirst('contact', [], ['id' => $item['contact-id'], 'self' => false]);
1567                         if (DBA::isResult($contact)) {
1568                                 $notify = self::isRemoteSelf($contact, $item);
1569                         }
1570                 }
1571
1572                 $distributed = self::insert($item, $notify);
1573
1574                 if (!$distributed) {
1575                         Logger::info("Distributed item wasn't stored", ['uri-id' => $item['uri-id'], 'user' => $uid]);
1576                 } else {
1577                         Logger::info('Distributed item was stored', ['uri-id' => $item['uri-id'], 'user' => $uid, 'stored' => $distributed]);
1578                 }
1579                 return $distributed;
1580         }
1581
1582         /**
1583          * Add a shadow entry for a given item id that is a thread starter
1584          *
1585          * We store every public item entry additionally with the user id "0".
1586          * This is used for the community page and for the search.
1587          * It is planned that in the future we will store public item entries only once.
1588          *
1589          * @param integer $itemid Item ID that should be added
1590          * @throws \Exception
1591          */
1592         private static function addShadow($itemid)
1593         {
1594                 $fields = ['uid', 'private', 'visible', 'deleted', 'network', 'uri-id'];
1595                 $condition = ['id' => $itemid, 'gravity' => GRAVITY_PARENT];
1596                 $item = Post::selectFirst($fields, $condition);
1597
1598                 if (!DBA::isResult($item)) {
1599                         return;
1600                 }
1601
1602                 // is it already a copy?
1603                 if (($itemid == 0) || ($item['uid'] == 0)) {
1604                         return;
1605                 }
1606
1607                 // Is it a visible public post?
1608                 if (!$item["visible"] || $item["deleted"]  || ($item["private"] == self::PRIVATE)) {
1609                         return;
1610                 }
1611
1612                 // is it an entry from a connector? Only add an entry for natively connected networks
1613                 if (!in_array($item["network"], array_merge(Protocol::FEDERATED ,['']))) {
1614                         return;
1615                 }
1616
1617                 if (Post::exists(['uri-id' => $item['uri-id'], 'uid' => 0])) {
1618                         return;
1619                 }
1620
1621                 $item = Post::selectFirst(self::ITEM_FIELDLIST, ['id' => $itemid]);
1622
1623                 if (DBA::isResult($item)) {
1624                         // Preparing public shadow (removing user specific data)
1625                         $item['uid'] = 0;
1626                         unset($item['id']);
1627                         unset($item['parent']);
1628                         unset($item['wall']);
1629                         unset($item['mention']);
1630                         unset($item['origin']);
1631                         unset($item['starred']);
1632                         unset($item['postopts']);
1633                         unset($item['inform']);
1634                         unset($item['post-reason']);
1635                         if ($item['uri-id'] == $item['parent-uri-id']) {
1636                                 $item['contact-id'] = $item['owner-id'];
1637                         } else {
1638                                 $item['contact-id'] = $item['author-id'];
1639                         }
1640
1641                         $public_shadow = self::insert($item);
1642
1643                         Logger::info('Stored public shadow', ['thread' => $itemid, 'id' => $public_shadow]);
1644                 }
1645         }
1646
1647         /**
1648          * Add a shadow entry for a given item id that is a comment
1649          *
1650          * This function does the same like the function above - but for comments
1651          *
1652          * @param integer $itemid Item ID that should be added
1653          * @throws \Exception
1654          */
1655         private static function addShadowPost($itemid)
1656         {
1657                 $item = Post::selectFirst(self::ITEM_FIELDLIST, ['id' => $itemid]);
1658                 if (!DBA::isResult($item)) {
1659                         return;
1660                 }
1661
1662                 // Is it a toplevel post?
1663                 if ($item['gravity'] == GRAVITY_PARENT) {
1664                         self::addShadow($itemid);
1665                         return;
1666                 }
1667
1668                 // Is this a shadow entry?
1669                 if ($item['uid'] == 0) {
1670                         return;
1671                 }
1672
1673                 // Is there a shadow parent?
1674                 if (!Post::exists(['uri-id' => $item['parent-uri-id'], 'uid' => 0])) {
1675                         return;
1676                 }
1677
1678                 // Is there already a shadow entry?
1679                 if (Post::exists(['uri-id' => $item['uri-id'], 'uid' => 0])) {
1680                         return;
1681                 }
1682
1683                 // Save "origin" and "parent" state
1684                 $origin = $item['origin'];
1685                 $parent = $item['parent'];
1686
1687                 // Preparing public shadow (removing user specific data)
1688                 $item['uid'] = 0;
1689                 unset($item['id']);
1690                 unset($item['parent']);
1691                 unset($item['wall']);
1692                 unset($item['mention']);
1693                 unset($item['origin']);
1694                 unset($item['starred']);
1695                 unset($item['postopts']);
1696                 unset($item['inform']);
1697                 unset($item['post-reason']);
1698                 $item['contact-id'] = Contact::getIdForURL($item['author-link']);
1699
1700                 $public_shadow = self::insert($item);
1701
1702                 Logger::info('Stored public shadow', ['uri-id' => $item['uri-id'], 'id' => $public_shadow]);
1703
1704                 // If this was a comment to a Diaspora post we don't get our comment back.
1705                 // This means that we have to distribute the comment by ourselves.
1706                 if ($origin && Post::exists(['id' => $parent, 'network' => Protocol::DIASPORA])) {
1707                         self::distribute($public_shadow);
1708                 }
1709         }
1710
1711         /**
1712          * Adds a language specification in a "language" element of given $arr.
1713          * Expects "body" element to exist in $arr.
1714          *
1715          * @param array $item
1716          * @return string detected language
1717          * @throws \Text_LanguageDetect_Exception
1718          */
1719         private static function getLanguage(array $item)
1720         {
1721                 if (!empty($item['language'])) {
1722                         return $item['language'];
1723                 }
1724
1725                 if (!in_array($item['gravity'], [GRAVITY_PARENT, GRAVITY_COMMENT]) || empty($item['body'])) {
1726                         return '';
1727                 }
1728
1729                 // Convert attachments to links
1730                 $naked_body = BBCode::removeAttachment($item['body']);
1731                 if (empty($naked_body)) {
1732                         return '';
1733                 }
1734
1735                 // Remove links and pictures
1736                 $naked_body = BBCode::removeLinks($naked_body);
1737
1738                 // Convert the title and the body to plain text
1739                 $naked_body = trim($item['title'] . "\n" . BBCode::toPlaintext($naked_body));
1740
1741                 // Remove possibly remaining links
1742                 $naked_body = preg_replace(Strings::autoLinkRegEx(), '', $naked_body);
1743
1744                 if (empty($naked_body)) {
1745                         return '';
1746                 }
1747
1748                 $availableLanguages = DI::l10n()->getAvailableLanguages();
1749                 // See https://github.com/friendica/friendica/issues/10511
1750                 // Persian is manually added to language detection until a persian translation is provided for the interface, at
1751                 // which point it will be automatically available through `getAvailableLanguages()` and this should be removed.
1752                 $availableLanguages['fa'] = 'fa';
1753
1754                 $ld = new Language($availableLanguages);
1755                 $languages = $ld->detect($naked_body)->limit(0, 3)->close();
1756                 if (is_array($languages)) {
1757                         return json_encode($languages);
1758                 }
1759
1760                 return '';
1761         }
1762
1763         public static function getLanguageMessage(array $item)
1764         {
1765                 $iso639 = new \Matriphe\ISO639\ISO639;
1766
1767                 $used_languages = '';
1768                 foreach (json_decode($item['language'], true) as $language => $reliability) {
1769                         $used_languages .= $iso639->languageByCode1($language) . ' (' . $language . "): " . number_format($reliability, 5) . '\n';
1770                 }
1771                 $used_languages = DI::l10n()->t('Detected languages in this post:\n%s', $used_languages);
1772                 return $used_languages;
1773         }
1774
1775         /**
1776          * Creates an unique guid out of a given uri
1777          *
1778          * @param string $uri uri of an item entry
1779          * @param string $host hostname for the GUID prefix
1780          * @return string unique guid
1781          */
1782         public static function guidFromUri($uri, $host)
1783         {
1784                 // Our regular guid routine is using this kind of prefix as well
1785                 // We have to avoid that different routines could accidentally create the same value
1786                 $parsed = parse_url($uri);
1787
1788                 // We use a hash of the hostname as prefix for the guid
1789                 $guid_prefix = hash("crc32", $host);
1790
1791                 // Remove the scheme to make sure that "https" and "http" doesn't make a difference
1792                 unset($parsed["scheme"]);
1793
1794                 // Glue it together to be able to make a hash from it
1795                 $host_id = implode("/", $parsed);
1796
1797                 // We could use any hash algorithm since it isn't a security issue
1798                 $host_hash = hash("ripemd128", $host_id);
1799
1800                 return $guid_prefix.$host_hash;
1801         }
1802
1803         /**
1804          * generate an unique URI
1805          *
1806          * @param integer $uid  User id
1807          * @param string  $guid An existing GUID (Otherwise it will be generated)
1808          *
1809          * @return string
1810          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1811          */
1812         public static function newURI($uid, $guid = "")
1813         {
1814                 if ($guid == "") {
1815                         $guid = System::createUUID();
1816                 }
1817
1818                 return DI::baseUrl()->get() . '/objects/' . $guid;
1819         }
1820
1821         /**
1822          * Set "success_update" and "last-item" to the date of the last time we heard from this contact
1823          *
1824          * This can be used to filter for inactive contacts.
1825          * Only do this for public postings to avoid privacy problems, since poco data is public.
1826          * Don't set this value if it isn't from the owner (could be an author that we don't know)
1827          *
1828          * @param array $arr Contains the just posted item record
1829          * @throws \Exception
1830          */
1831         private static function updateContact($arr)
1832         {
1833                 // Unarchive the author
1834                 $contact = DBA::selectFirst('contact', [], ['id' => $arr["author-id"]]);
1835                 if (DBA::isResult($contact)) {
1836                         Contact::unmarkForArchival($contact);
1837                 }
1838
1839                 // Unarchive the contact if it's not our own contact
1840                 $contact = DBA::selectFirst('contact', [], ['id' => $arr["contact-id"], 'self' => false]);
1841                 if (DBA::isResult($contact)) {
1842                         Contact::unmarkForArchival($contact);
1843                 }
1844
1845                 /// @todo On private posts we could obfuscate the date
1846                 $update = ($arr['private'] != self::PRIVATE) || in_array($arr['network'], Protocol::FEDERATED);
1847
1848                 // Is it a forum? Then we don't care about the rules from above
1849                 if (!$update && in_array($arr["network"], [Protocol::ACTIVITYPUB, Protocol::DFRN]) && ($arr["parent-uri-id"] === $arr["uri-id"])) {
1850                         if (DBA::exists('contact', ['id' => $arr['contact-id'], 'forum' => true])) {
1851                                 $update = true;
1852                         }
1853                 }
1854
1855                 if ($update) {
1856                         // The "self" contact id is used (for example in the connectors) when the contact is unknown
1857                         // So we have to ensure to only update the last item when it had been our own post,
1858                         // or it had been done by a "regular" contact.
1859                         if (!empty($arr['wall'])) {
1860                                 $condition = ['id' => $arr['contact-id']];
1861                         } else {
1862                                 $condition = ['id' => $arr['contact-id'], 'self' => false];
1863                         }
1864                         Contact::update(['failed' => false, 'success_update' => $arr['received'], 'last-item' => $arr['received']], $condition);
1865                 }
1866                 // Now do the same for the system wide contacts with uid=0
1867                 if ($arr['private'] != self::PRIVATE) {
1868                         Contact::update(['failed' => false, 'success_update' => $arr['received'], 'last-item' => $arr['received']],
1869                                 ['id' => $arr['owner-id']]);
1870
1871                         if ($arr['owner-id'] != $arr['author-id']) {
1872                                 Contact::update(['failed' => false, 'success_update' => $arr['received'], 'last-item' => $arr['received']],
1873                                         ['id' => $arr['author-id']]);
1874                         }
1875                 }
1876         }
1877
1878         public static function setHashtags($body)
1879         {
1880                 $body = BBCode::performWithEscapedTags($body, ['noparse', 'pre', 'code', 'img'], function ($body) {
1881                         $tags = BBCode::getTags($body);
1882
1883                         // No hashtags?
1884                         if (!count($tags)) {
1885                                 return $body;
1886                         }
1887
1888                         // This sorting is important when there are hashtags that are part of other hashtags
1889                         // Otherwise there could be problems with hashtags like #test and #test2
1890                         // Because of this we are sorting from the longest to the shortest tag.
1891                         usort($tags, function ($a, $b) {
1892                                 return strlen($b) <=> strlen($a);
1893                         });
1894
1895                         $URLSearchString = "^\[\]";
1896
1897                         // All hashtags should point to the home server if "local_tags" is activated
1898                         if (DI::config()->get('system', 'local_tags')) {
1899                                 $body = preg_replace("/#\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",
1900                                         "#[url=" . DI::baseUrl() . "/search?tag=$2]$2[/url]", $body);
1901                         }
1902
1903                         // mask hashtags inside of url, bookmarks and attachments to avoid urls in urls
1904                         $body = preg_replace_callback("/\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",
1905                                 function ($match) {
1906                                         return ("[url=" . str_replace("#", "&num;", $match[1]) . "]" . str_replace("#", "&num;", $match[2]) . "[/url]");
1907                                 }, $body);
1908
1909                         $body = preg_replace_callback("/\[bookmark\=([$URLSearchString]*)\](.*?)\[\/bookmark\]/ism",
1910                                 function ($match) {
1911                                         return ("[bookmark=" . str_replace("#", "&num;", $match[1]) . "]" . str_replace("#", "&num;", $match[2]) . "[/bookmark]");
1912                                 }, $body);
1913
1914                         $body = preg_replace_callback("/\[attachment (.*?)\](.*?)\[\/attachment\]/ism",
1915                                 function ($match) {
1916                                         return ("[attachment " . str_replace("#", "&num;", $match[1]) . "]" . $match[2] . "[/attachment]");
1917                                 }, $body);
1918
1919                         // Repair recursive urls
1920                         $body = preg_replace("/&num;\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",
1921                                 "&num;$2", $body);
1922
1923                         foreach ($tags as $tag) {
1924                                 if ((strpos($tag, '#') !== 0) || strpos($tag, '[url=') || strlen($tag) < 2 || $tag[1] == '#') {
1925                                         continue;
1926                                 }
1927
1928                                 $basetag = str_replace('_', ' ', substr($tag, 1));
1929                                 $newtag = '#[url=' . DI::baseUrl() . '/search?tag=' . $basetag . ']' . $basetag . '[/url]';
1930
1931                                 $body = str_replace($tag, $newtag, $body);
1932                         }
1933
1934                         // Convert back the masked hashtags
1935                         $body = str_replace("&num;", "#", $body);
1936
1937                         return $body;
1938                 });
1939
1940                 return $body;
1941         }
1942
1943         /**
1944          * look for mention tags and setup a second delivery chain for forum/community posts if appropriate
1945          *
1946          * @param int $uid
1947          * @param int $item_id
1948          * @return boolean true if item was deleted, else false
1949          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1950          * @throws \ImagickException
1951          */
1952         private static function tagDeliver($uid, $item_id)
1953         {
1954                 $mention = false;
1955
1956                 $owner = User::getOwnerDataById($uid);
1957                 if (!DBA::isResult($owner)) {
1958                         Logger::warning('User not found, quitting here.', ['uid' => $uid]);
1959                         return false;
1960                 }
1961
1962                 if ($owner['contact-type'] != User::ACCOUNT_TYPE_COMMUNITY) {
1963                         Logger::debug('Owner is no community, quitting here.', ['uid' => $uid, 'id' => $item_id]);
1964                         return false;
1965                 }
1966
1967                 $item = Post::selectFirst(self::ITEM_FIELDLIST, ['id' => $item_id, 'gravity' => [GRAVITY_PARENT, GRAVITY_COMMENT], 'origin' => false]);
1968                 if (!DBA::isResult($item)) {
1969                         Logger::debug('Post is an activity or origin or not found at all, quitting here.', ['id' => $item_id]);
1970                         return false;
1971                 }
1972
1973                 if ($item['gravity'] == GRAVITY_PARENT) {
1974                         $tags = Tag::getByURIId($item['uri-id'], [Tag::MENTION, Tag::EXCLUSIVE_MENTION]);
1975                         foreach ($tags as $tag) {
1976                                 if (Strings::compareLink($owner['url'], $tag['url'])) {
1977                                         $mention = true;
1978                                         Logger::info('Mention found in tag.', ['url' => $tag['url'], 'uri' => $item['uri'], 'uid' => $uid, 'id' => $item_id, 'uri-id' => $item['uri-id'], 'guid' => $item['guid']]);
1979                                 }
1980                         }
1981
1982                         if (!$mention) {
1983                                 Logger::info('Top-level post without mention is deleted.', ['uri' => $item['uri'], $uid, 'id' => $item_id, 'uri-id' => $item['uri-id'], 'guid' => $item['guid']]);
1984                                 Post\User::delete(['uri-id' => $item['uri-id'], 'uid' => $item['uid']]);
1985                                 return true;
1986                         }
1987
1988                         $arr = ['item' => $item, 'user' => $owner];
1989
1990                         Hook::callAll('tagged', $arr);
1991                 } else {
1992                         $tags = Tag::getByURIId($item['parent-uri-id'], [Tag::MENTION, Tag::EXCLUSIVE_MENTION]);
1993                         foreach ($tags as $tag) {
1994                                 if (Strings::compareLink($owner['url'], $tag['url'])) {
1995                                         $mention = true;
1996                                         Logger::info('Mention found in parent tag.', ['url' => $tag['url'], 'uri' => $item['uri'], 'uid' => $uid, 'id' => $item_id, 'uri-id' => $item['uri-id'], 'guid' => $item['guid']]);
1997                                 }
1998                         }
1999
2000                         if (!$mention) {
2001                                 Logger::debug('No mentions found in parent, quitting here.', ['id' => $item_id, 'uri-id' => $item['uri-id'], 'guid' => $item['guid']]);
2002                                 return false;
2003                         }
2004                 }
2005
2006                 Logger::info('Community post will be distributed', ['uri' => $item['uri'], 'uid' => $uid, 'id' => $item_id, 'uri-id' => $item['uri-id'], 'guid' => $item['guid']]);
2007
2008                 if ($owner['page-flags'] == User::PAGE_FLAGS_PRVGROUP) {
2009                         $allow_cid = '';
2010                         $allow_gid = '<' . Group::FOLLOWERS . '>';
2011                         $deny_cid  = '';
2012                         $deny_gid  = '';
2013                         self::performActivity($item['id'], 'announce', $uid, $allow_cid, $allow_gid, $deny_cid, $deny_gid);
2014                 } else {
2015                         self::performActivity($item['id'], 'announce', $uid);
2016                 }
2017
2018                 Logger::info('Community post had been distributed', ['uri' => $item['uri'], 'uid' => $uid, 'id' => $item_id, 'uri-id' => $item['uri-id'], 'guid' => $item['guid']]);
2019                 return false;
2020         }
2021
2022         /**
2023          * Automatically reshare the item if the "remote_self" option is selected
2024          *
2025          * @param array $item
2026          * @return void
2027          */
2028         private static function autoReshare(array $item)
2029         {
2030                 if ($item['gravity'] != GRAVITY_PARENT) {
2031                         return;
2032                 }
2033
2034                 if (!DBA::exists('contact', ['id' => $item['contact-id'], 'remote_self' => Contact::MIRROR_NATIVE_RESHARE])) {
2035                         return;
2036                 }
2037
2038                 if (!in_array($item['network'], [Protocol::ACTIVITYPUB, Protocol::DFRN])) {
2039                         return;
2040                 }
2041
2042                 Logger::info('Automatically reshare item', ['uid' => $item['uid'], 'id' => $item['id'], 'guid' => $item['guid'], 'uri-id' => $item['uri-id']]);
2043
2044                 self::performActivity($item['id'], 'announce', $item['uid']);
2045         }
2046
2047         public static function isRemoteSelf($contact, &$datarray)
2048         {
2049                 if (!$contact['remote_self']) {
2050                         return false;
2051                 }
2052
2053                 // Prevent the forwarding of posts that are forwarded
2054                 if (!empty($datarray["extid"]) && ($datarray["extid"] == Protocol::DFRN)) {
2055                         Logger::info('Already forwarded');
2056                         return false;
2057                 }
2058
2059                 // Prevent to forward already forwarded posts
2060                 if ($datarray["app"] == DI::baseUrl()->getHostname()) {
2061                         Logger::info('Already forwarded (second test)');
2062                         return false;
2063                 }
2064
2065                 // Only forward posts
2066                 if ($datarray["verb"] != Activity::POST) {
2067                         Logger::info('No post');
2068                         return false;
2069                 }
2070
2071                 if (($contact['network'] != Protocol::FEED) && ($datarray['private'] == self::PRIVATE)) {
2072                         Logger::info('Not public');
2073                         return false;
2074                 }
2075
2076                 $datarray2 = $datarray;
2077                 Logger::info('remote-self start', ['contact' => $contact['url'], 'remote_self'=> $contact['remote_self'], 'item' => $datarray]);
2078                 if ($contact['remote_self'] == Contact::MIRROR_OWN_POST) {
2079                         $self = DBA::selectFirst('contact', ['id', 'name', 'url', 'thumb'],
2080                                         ['uid' => $contact['uid'], 'self' => true]);
2081                         if (DBA::isResult($self)) {
2082                                 $datarray['contact-id'] = $self["id"];
2083
2084                                 $datarray['owner-name'] = $self["name"];
2085                                 $datarray['owner-link'] = $self["url"];
2086                                 $datarray['owner-avatar'] = $self["thumb"];
2087
2088                                 $datarray['author-name']   = $datarray['owner-name'];
2089                                 $datarray['author-link']   = $datarray['owner-link'];
2090                                 $datarray['author-avatar'] = $datarray['owner-avatar'];
2091
2092                                 unset($datarray['edited']);
2093
2094                                 unset($datarray['network']);
2095                                 unset($datarray['owner-id']);
2096                                 unset($datarray['author-id']);
2097                         }
2098
2099                         if ($contact['network'] != Protocol::FEED) {
2100                                 $old_uri_id = $datarray["uri-id"] ?? 0;
2101                                 $datarray["guid"] = System::createUUID();
2102                                 unset($datarray["plink"]);
2103                                 $datarray["uri"] = self::newURI($contact['uid'], $datarray["guid"]);
2104                                 $datarray["uri-id"] = ItemURI::getIdByURI($datarray["uri"]);
2105                                 $datarray["extid"] = Protocol::DFRN;
2106                                 $urlpart = parse_url($datarray2['author-link']);
2107                                 $datarray["app"] = $urlpart["host"];
2108                                 if (!empty($old_uri_id)) {
2109                                         Post\Media::copy($old_uri_id, $datarray["uri-id"]);
2110                                 }
2111
2112                                 unset($datarray["parent-uri"]);
2113                                 unset($datarray["thr-parent"]);
2114                         } else {
2115                                 $datarray['private'] = self::PUBLIC;
2116                         }
2117                 }
2118
2119                 if ($contact['network'] != Protocol::FEED) {
2120                         // Store the original post
2121                         $result = self::insert($datarray2);
2122                         Logger::info('remote-self post original item', ['contact' => $contact['url'], 'result'=> $result, 'item' => $datarray2]);
2123                 } else {
2124                         $datarray["app"] = "Feed";
2125                         $result = true;
2126                 }
2127
2128                 return (bool)$result;
2129         }
2130
2131         /**
2132          *
2133          * @param string $s
2134          * @param int    $uid
2135          * @param array  $item
2136          * @param int    $cid
2137          * @return string
2138          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
2139          * @throws \ImagickException
2140          */
2141         public static function fixPrivatePhotos($s, $uid, $item = null, $cid = 0)
2142         {
2143                 if (DI::config()->get('system', 'disable_embedded')) {
2144                         return $s;
2145                 }
2146
2147                 Logger::info('check for photos');
2148                 $site = substr(DI::baseUrl(), strpos(DI::baseUrl(), '://'));
2149
2150                 $orig_body = $s;
2151                 $new_body = '';
2152
2153                 $img_start = strpos($orig_body, '[img');
2154                 $img_st_close = ($img_start !== false ? strpos(substr($orig_body, $img_start), ']') : false);
2155                 $img_len = ($img_start !== false ? strpos(substr($orig_body, $img_start + $img_st_close + 1), '[/img]') : false);
2156
2157                 while (($img_st_close !== false) && ($img_len !== false)) {
2158                         $img_st_close++; // make it point to AFTER the closing bracket
2159                         $image = substr($orig_body, $img_start + $img_st_close, $img_len);
2160
2161                         Logger::info('found photo', ['image' => $image]);
2162
2163                         if (stristr($image, $site . '/photo/')) {
2164                                 // Only embed locally hosted photos
2165                                 $replace = false;
2166                                 $i = basename($image);
2167                                 $i = str_replace(['.jpg', '.png', '.gif'], ['', '', ''], $i);
2168                                 $x = strpos($i, '-');
2169
2170                                 if ($x) {
2171                                         $res = substr($i, $x + 1);
2172                                         $i = substr($i, 0, $x);
2173                                         $photo = Photo::getPhotoForUser($uid, $i, $res);
2174                                         if (DBA::isResult($photo)) {
2175                                                 /*
2176                                                  * Check to see if we should replace this photo link with an embedded image
2177                                                  * 1. No need to do so if the photo is public
2178                                                  * 2. If there's a contact-id provided, see if they're in the access list
2179                                                  *    for the photo. If so, embed it.
2180                                                  * 3. Otherwise, if we have an item, see if the item permissions match the photo
2181                                                  *    permissions, regardless of order but first check to see if they're an exact
2182                                                  *    match to save some processing overhead.
2183                                                  */
2184                                                 if (self::hasPermissions($photo)) {
2185                                                         if ($cid) {
2186                                                                 $recips = self::enumeratePermissions($photo);
2187                                                                 if (in_array($cid, $recips)) {
2188                                                                         $replace = true;
2189                                                                 }
2190                                                         } elseif ($item) {
2191                                                                 if (self::samePermissions($uid, $item, $photo)) {
2192                                                                         $replace = true;
2193                                                                 }
2194                                                         }
2195                                                 }
2196                                                 if ($replace) {
2197                                                         $photo_img = Photo::getImageForPhoto($photo);
2198                                                         // If a custom width and height were specified, apply before embedding
2199                                                         if (preg_match("/\[img\=([0-9]*)x([0-9]*)\]/is", substr($orig_body, $img_start, $img_st_close), $match)) {
2200                                                                 Logger::info('scaling photo');
2201
2202                                                                 $width = intval($match[1]);
2203                                                                 $height = intval($match[2]);
2204
2205                                                                 $photo_img->scaleDown(max($width, $height));
2206                                                         }
2207
2208                                                         $data = $photo_img->asString();
2209                                                         $type = $photo_img->getType();
2210
2211                                                         Logger::info('replacing photo');
2212                                                         $image = 'data:' . $type . ';base64,' . base64_encode($data);
2213                                                         Logger::debug('replaced', ['image' => $image]);
2214                                                 }
2215                                         }
2216                                 }
2217                         }
2218
2219                         $new_body = $new_body . substr($orig_body, 0, $img_start + $img_st_close) . $image . '[/img]';
2220                         $orig_body = substr($orig_body, $img_start + $img_st_close + $img_len + strlen('[/img]'));
2221                         if ($orig_body === false) {
2222                                 $orig_body = '';
2223                         }
2224
2225                         $img_start = strpos($orig_body, '[img');
2226                         $img_st_close = ($img_start !== false ? strpos(substr($orig_body, $img_start), ']') : false);
2227                         $img_len = ($img_start !== false ? strpos(substr($orig_body, $img_start + $img_st_close + 1), '[/img]') : false);
2228                 }
2229
2230                 $new_body = $new_body . $orig_body;
2231
2232                 return $new_body;
2233         }
2234
2235         private static function hasPermissions($obj)
2236         {
2237                 return !empty($obj['allow_cid']) || !empty($obj['allow_gid']) ||
2238                         !empty($obj['deny_cid']) || !empty($obj['deny_gid']);
2239         }
2240
2241         private static function samePermissions($uid, $obj1, $obj2)
2242         {
2243                 // first part is easy. Check that these are exactly the same.
2244                 if (($obj1['allow_cid'] == $obj2['allow_cid'])
2245                         && ($obj1['allow_gid'] == $obj2['allow_gid'])
2246                         && ($obj1['deny_cid'] == $obj2['deny_cid'])
2247                         && ($obj1['deny_gid'] == $obj2['deny_gid'])) {
2248                         return true;
2249                 }
2250
2251                 // This is harder. Parse all the permissions and compare the resulting set.
2252                 $recipients1 = self::enumeratePermissions($obj1);
2253                 $recipients2 = self::enumeratePermissions($obj2);
2254                 sort($recipients1);
2255                 sort($recipients2);
2256
2257                 /// @TODO Comparison of arrays, maybe use array_diff_assoc() here?
2258                 return ($recipients1 == $recipients2);
2259         }
2260
2261         /**
2262          * Returns an array of contact-ids that are allowed to see this object
2263          *
2264          * @param array $obj        Item array with at least uid, allow_cid, allow_gid, deny_cid and deny_gid
2265          * @param bool  $check_dead Prunes unavailable contacts from the result
2266          * @return array
2267          * @throws \Exception
2268          */
2269         public static function enumeratePermissions(array $obj, bool $check_dead = false)
2270         {
2271                 $aclFormater = DI::aclFormatter();
2272
2273                 $allow_people = $aclFormater->expand($obj['allow_cid']);
2274                 $allow_groups = Group::expand($obj['uid'], $aclFormater->expand($obj['allow_gid']), $check_dead);
2275                 $deny_people  = $aclFormater->expand($obj['deny_cid']);
2276                 $deny_groups  = Group::expand($obj['uid'], $aclFormater->expand($obj['deny_gid']), $check_dead);
2277                 $recipients   = array_unique(array_merge($allow_people, $allow_groups));
2278                 $deny         = array_unique(array_merge($deny_people, $deny_groups));
2279                 $recipients   = array_diff($recipients, $deny);
2280                 return $recipients;
2281         }
2282
2283         public static function expire(int $uid, int $days, string $network = "", bool $force = false)
2284         {
2285                 if (!$uid || ($days < 1)) {
2286                         return;
2287                 }
2288
2289                 $condition = ["`uid` = ? AND NOT `deleted` AND `gravity` = ?",
2290                         $uid, GRAVITY_PARENT];
2291
2292                 /*
2293                  * $expire_network_only = save your own wall posts
2294                  * and just expire conversations started by others
2295                  */
2296                 $expire_network_only = DI::pConfig()->get($uid, 'expire', 'network_only', false);
2297
2298                 if ($expire_network_only) {
2299                         $condition[0] .= " AND NOT `wall`";
2300                 }
2301
2302                 if ($network != "") {
2303                         $condition[0] .= " AND `network` = ?";
2304                         $condition[] = $network;
2305                 }
2306
2307                 $condition[0] .= " AND `received` < ?";
2308                 $condition[] = DateTimeFormat::utc('now - ' . $days . ' day');
2309
2310                 $items = Post::select(['resource-id', 'starred', 'id', 'post-type', 'uid', 'uri-id'], $condition);
2311
2312                 if (!DBA::isResult($items)) {
2313                         return;
2314                 }
2315
2316                 $expire_items = DI::pConfig()->get($uid, 'expire', 'items', true);
2317
2318                 // Forcing expiring of items - but not notes and marked items
2319                 if ($force) {
2320                         $expire_items = true;
2321                 }
2322
2323                 $expire_notes = DI::pConfig()->get($uid, 'expire', 'notes', true);
2324                 $expire_starred = DI::pConfig()->get($uid, 'expire', 'starred', true);
2325                 $expire_photos = DI::pConfig()->get($uid, 'expire', 'photos', false);
2326
2327                 $expired = 0;
2328
2329                 $priority = DI::config()->get('system', 'expire-notify-priority');
2330
2331                 while ($item = Post::fetch($items)) {
2332                         // don't expire filed items
2333                         if (DBA::exists('post-category', ['uri-id' => $item['uri-id'], 'uid' => $item['uid'], 'type' => Post\Category::FILE])) {
2334                                 continue;
2335                         }
2336
2337                         // Only expire posts, not photos and photo comments
2338
2339                         if (!$expire_photos && !empty($item['resource-id'])) {
2340                                 continue;
2341                         } elseif (!$expire_starred && intval($item['starred'])) {
2342                                 continue;
2343                         } elseif (!$expire_notes && ($item['post-type'] == self::PT_PERSONAL_NOTE)) {
2344                                 continue;
2345                         } elseif (!$expire_items && ($item['post-type'] != self::PT_PERSONAL_NOTE)) {
2346                                 continue;
2347                         }
2348
2349                         self::markForDeletionById($item['id'], $priority);
2350
2351                         ++$expired;
2352                 }
2353                 DBA::close($items);
2354                 Logger::notice('User ' . $uid . ": expired $expired items; expire items: $expire_items, expire notes: $expire_notes, expire starred: $expire_starred, expire photos: $expire_photos");
2355         }
2356
2357         public static function firstPostDate($uid, $wall = false)
2358         {
2359                 $user = User::getById($uid, ['register_date']);
2360                 if (empty($user)) {
2361                         return false;
2362                 }
2363
2364                 $condition = ["`uid` = ? AND `wall` = ? AND NOT `deleted` AND `visible` AND `received` >= ?",
2365                         $uid, $wall, $user['register_date']];
2366                 $params = ['order' => ['received' => false]];
2367                 $thread = Post::selectFirstThread(['received'], $condition, $params);
2368                 if (DBA::isResult($thread)) {
2369                         $postdate = substr(DateTimeFormat::local($thread['received']), 0, 10);
2370                         return $postdate;
2371                 }
2372                 return false;
2373         }
2374
2375         /**
2376          * add/remove activity to an item
2377          *
2378          * Toggle activities as like,dislike,attend of an item
2379          *
2380          * @param int    $item_id
2381          * @param string $verb
2382          *            Activity verb. One of
2383          *            like, unlike, dislike, undislike, attendyes, unattendyes,
2384          *            attendno, unattendno, attendmaybe, unattendmaybe,
2385          *            announce, unannouce
2386          * @param int    $uid
2387          * @param string $allow_cid
2388          * @param string $allow_gid
2389          * @param string $deny_cid
2390          * @param string $deny_gid
2391          * @return bool
2392          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
2393          * @throws \ImagickException
2394          * @hook  'post_local_end'
2395          *            array $arr
2396          *            'post_id' => ID of posted item
2397          */
2398         public static function performActivity(int $item_id, string $verb, int $uid, string $allow_cid = null, string $allow_gid = null, string $deny_cid = null, string $deny_gid = null)
2399         {
2400                 if (empty($uid)) {
2401                         return false;
2402                 }
2403
2404                 Logger::notice('Start create activity', ['verb' => $verb, 'item' => $item_id, 'user' => $uid]);
2405
2406                 $item = Post::selectFirst(self::ITEM_FIELDLIST, ['id' => $item_id]);
2407                 if (!DBA::isResult($item)) {
2408                         Logger::notice('like: unknown item', ['id' => $item_id]);
2409                         return false;
2410                 }
2411
2412                 $uri_id = $item['uri-id'];
2413
2414                 if (!in_array($item['uid'], [0, $uid])) {
2415                         return false;
2416                 }
2417
2418                 if (!Post::exists(['uri-id' => $item['parent-uri-id'], 'uid' => $uid])) {
2419                         $stored = self::storeForUserByUriId($item['parent-uri-id'], $uid);
2420                         if (($item['parent-uri-id'] == $item['uri-id']) && !empty($stored)) {
2421                                 $item = Post::selectFirst(self::ITEM_FIELDLIST, ['id' => $stored]);
2422                                 if (!DBA::isResult($item)) {
2423                                         Logger::info('Could not fetch just created item - should not happen', ['stored' => $stored, 'uid' => $uid, 'uri-id' => $uri_id]);
2424                                         return false;
2425                                 }
2426                         }
2427                 }
2428
2429                 // Retrieves the local post owner
2430                 $owner = User::getOwnerDataById($uid);
2431                 if (empty($owner)) {
2432                         Logger::info('Empty owner for user', ['uid' => $uid]);
2433                         return false;
2434                 }
2435
2436                 // Retrieve the current logged in user's public contact
2437                 $author_id = Contact::getIdForURL($owner['url']);
2438                 if (empty($author_id)) {
2439                         Logger::info('Empty public contact');
2440                         return false;
2441                 }
2442
2443                 $activity = null;
2444                 switch ($verb) {
2445                         case 'like':
2446                         case 'unlike':
2447                                 $activity = Activity::LIKE;
2448                                 break;
2449                         case 'dislike':
2450                         case 'undislike':
2451                                 $activity = Activity::DISLIKE;
2452                                 break;
2453                         case 'attendyes':
2454                         case 'unattendyes':
2455                                 $activity = Activity::ATTEND;
2456                                 break;
2457                         case 'attendno':
2458                         case 'unattendno':
2459                                 $activity = Activity::ATTENDNO;
2460                                 break;
2461                         case 'attendmaybe':
2462                         case 'unattendmaybe':
2463                                 $activity = Activity::ATTENDMAYBE;
2464                                 break;
2465                         case 'follow':
2466                         case 'unfollow':
2467                                 $activity = Activity::FOLLOW;
2468                                 break;
2469                         case 'announce':
2470                         case 'unannounce':
2471                                 $activity = Activity::ANNOUNCE;
2472                                 break;
2473                         default:
2474                                 Logger::notice('unknown verb', ['verb' => $verb, 'item' => $item_id]);
2475                                 return false;
2476                 }
2477
2478                 $mode = Strings::startsWith($verb, 'un') ? 'delete' : 'create';
2479
2480                 // Enable activity toggling instead of on/off
2481                 $event_verb_flag = $activity === Activity::ATTEND || $activity === Activity::ATTENDNO || $activity === Activity::ATTENDMAYBE;
2482
2483                 // Look for an existing verb row
2484                 // Event participation activities are mutually exclusive, only one of them can exist at all times.
2485                 if ($event_verb_flag) {
2486                         $verbs = [Activity::ATTEND, Activity::ATTENDNO, Activity::ATTENDMAYBE];
2487
2488                         // Translate to the index based activity index
2489                         $vids = [];
2490                         foreach ($verbs as $verb) {
2491                                 $vids[] = Verb::getID($verb);
2492                         }
2493                 } else {
2494                         $vids = Verb::getID($activity);
2495                 }
2496
2497                 $condition = ['vid' => $vids, 'deleted' => false, 'gravity' => GRAVITY_ACTIVITY,
2498                         'author-id' => $author_id, 'uid' => $item['uid'], 'thr-parent-id' => $uri_id];
2499                 $like_item = Post::selectFirst(['id', 'guid', 'verb'], $condition);
2500
2501                 if (DBA::isResult($like_item)) {
2502                         /**
2503                          * Truth table for existing activities
2504                          *
2505                          * |          Inputs            ||      Outputs      |
2506                          * |----------------------------||-------------------|
2507                          * |  Mode  | Event | Same verb || Delete? | Return? |
2508                          * |--------|-------|-----------||---------|---------|
2509                          * | create |  Yes  |    Yes    ||   No    |   Yes   |
2510                          * | create |  Yes  |    No     ||   Yes   |   No    |
2511                          * | create |  No   |    Yes    ||   No    |   Yes   |
2512                          * | create |  No   |    No     ||        N/A†       |
2513                          * | delete |  Yes  |    Yes    ||   Yes   |   N/A‡  |
2514                          * | delete |  Yes  |    No     ||   No    |   N/A‡  |
2515                          * | delete |  No   |    Yes    ||   Yes   |   N/A‡  |
2516                          * | delete |  No   |    No     ||        N/A†       |
2517                          * |--------|-------|-----------||---------|---------|
2518                          * |   A    |   B   |     C     || A xor C | !B or C |
2519                          *
2520                          * † Can't happen: It's impossible to find an existing non-event activity without
2521                          *                 the same verb because we are only looking for this single verb.
2522                          *
2523                          * ‡ The "mode = delete" is returning early whether an existing activity was found or not.
2524                          */
2525                         if ($mode == 'create' xor $like_item['verb'] == $activity) {
2526                                 self::markForDeletionById($like_item['id']);
2527                         }
2528
2529                         if (!$event_verb_flag || $like_item['verb'] == $activity) {
2530                                 return true;
2531                         }
2532                 }
2533
2534                 // No need to go further if we aren't creating anything
2535                 if ($mode == 'delete') {
2536                         return true;
2537                 }
2538
2539                 $objtype = $item['resource-id'] ? Activity\ObjectType::IMAGE : Activity\ObjectType::NOTE;
2540
2541                 $new_item = [
2542                         'guid'          => System::createUUID(),
2543                         'uri'           => self::newURI($item['uid']),
2544                         'uid'           => $item['uid'],
2545                         'contact-id'    => $owner['id'],
2546                         'wall'          => $item['wall'],
2547                         'origin'        => 1,
2548                         'network'       => Protocol::DFRN,
2549                         'protocol'      => Conversation::PARCEL_DIRECT,
2550                         'direction'     => Conversation::PUSH,
2551                         'gravity'       => GRAVITY_ACTIVITY,
2552                         'parent'        => $item['id'],
2553                         'thr-parent'    => $item['uri'],
2554                         'owner-id'      => $author_id,
2555                         'author-id'     => $author_id,
2556                         'body'          => $activity,
2557                         'verb'          => $activity,
2558                         'object-type'   => $objtype,
2559                         'allow_cid'     => $allow_cid ?? $item['allow_cid'],
2560                         'allow_gid'     => $allow_gid ?? $item['allow_gid'],
2561                         'deny_cid'      => $deny_cid ?? $item['deny_cid'],
2562                         'deny_gid'      => $deny_gid ?? $item['deny_gid'],
2563                         'visible'       => 1,
2564                         'unseen'        => 1,
2565                 ];
2566
2567                 $signed = Diaspora::createLikeSignature($uid, $new_item);
2568                 if (!empty($signed)) {
2569                         $new_item['diaspora_signed_text'] = json_encode($signed);
2570                 }
2571
2572                 $new_item_id = self::insert($new_item);
2573
2574                 // If the parent item isn't visible then set it to visible
2575                 if (!$item['visible']) {
2576                         self::update(['visible' => true], ['id' => $item['id']]);
2577                 }
2578
2579                 $new_item['id'] = $new_item_id;
2580
2581                 Hook::callAll('post_local_end', $new_item);
2582
2583                 return true;
2584         }
2585
2586         /**
2587          * Fetch the SQL condition for the given user id
2588          *
2589          * @param integer $owner_id User ID for which the permissions should be fetched
2590          * @return array condition
2591          */
2592         public static function getPermissionsConditionArrayByUserId(int $owner_id)
2593         {
2594                 $local_user = local_user();
2595                 $remote_user = Session::getRemoteContactID($owner_id);
2596
2597                 // default permissions - anonymous user
2598                 $condition = ["`private` != ?", self::PRIVATE];
2599
2600                 if ($local_user && ($local_user == $owner_id)) {
2601                         // Profile owner - everything is visible
2602                         $condition = [];
2603                 } elseif ($remote_user) {
2604                          // Authenticated visitor - fetch the matching permissionsets
2605                         $permissionSets = DI::permissionSet()->selectByContactId($remote_user, $owner_id);
2606                         if (!empty($set)) {
2607                                 $condition = ["(`private` != ? OR (`private` = ? AND `wall`
2608                                         AND `psid` IN (" . implode(', ', array_fill(0, count($set), '?')) . ")))",
2609                                         self::PRIVATE, self::PRIVATE];
2610                                 $condition = array_merge($condition, $permissionSets->column('id'));
2611                         }
2612                 }
2613
2614                 return $condition;
2615         }
2616
2617         /**
2618          * Get a permission SQL string for the given user
2619          *
2620          * @param int $owner_id
2621          * @param string $table
2622          * @return string
2623          */
2624         public static function getPermissionsSQLByUserId(int $owner_id, string $table = '')
2625         {
2626                 $local_user = local_user();
2627                 $remote_user = Session::getRemoteContactID($owner_id);
2628
2629                 if (!empty($table)) {
2630                         $table = DBA::quoteIdentifier($table) . '.';
2631                 }
2632
2633                 /*
2634                  * Construct permissions
2635                  *
2636                  * default permissions - anonymous user
2637                  */
2638                 $sql = sprintf(" AND " . $table . "`private` != %d", self::PRIVATE);
2639
2640                 // Profile owner - everything is visible
2641                 if ($local_user && ($local_user == $owner_id)) {
2642                         $sql = '';
2643                 } elseif ($remote_user) {
2644                         /*
2645                          * Authenticated visitor. Unless pre-verified,
2646                          * check that the contact belongs to this $owner_id
2647                          * and load the groups the visitor belongs to.
2648                          * If pre-verified, the caller is expected to have already
2649                          * done this and passed the groups into this function.
2650                          */
2651                         $permissionSets = DI::permissionSet()->selectByContactId($remote_user, $owner_id);
2652
2653                         if (!empty($set)) {
2654                                 $sql_set = sprintf(" OR (" . $table . "`private` = %d AND " . $table . "`wall` AND " . $table . "`psid` IN (", self::PRIVATE) . implode(',', $permissionSets->column('id')) . "))";
2655                         } else {
2656                                 $sql_set = '';
2657                         }
2658
2659                         $sql = sprintf(" AND (" . $table . "`private` != %d", self::PRIVATE) . $sql_set . ")";
2660                 }
2661
2662                 return $sql;
2663         }
2664
2665         /**
2666          * get translated item type
2667          *
2668          * @param array                $item
2669          * @param \Friendica\Core\L10n $l10n
2670          * @return string
2671          */
2672         public static function postType(array $item, \Friendica\Core\L10n $l10n)
2673         {
2674                 if (!empty($item['event-id'])) {
2675                         return $l10n->t('event');
2676                 } elseif (!empty($item['resource-id'])) {
2677                         return $l10n->t('photo');
2678                 } elseif ($item['gravity'] == GRAVITY_ACTIVITY) {
2679                         return $l10n->t('activity');
2680                 } elseif ($item['gravity'] == GRAVITY_COMMENT) {
2681                         return $l10n->t('comment');
2682                 }
2683
2684                 return $l10n->t('post');
2685         }
2686
2687         /**
2688          * Sets the "rendered-html" field of the provided item
2689          *
2690          * Body is preserved to avoid side-effects as we modify it just-in-time for spoilers and private image links
2691          *
2692          * @param array $item
2693          *
2694          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
2695          * @todo Remove reference, simply return "rendered-html" and "rendered-hash"
2696          */
2697         public static function putInCache(&$item)
2698         {
2699                 // Save original body to prevent addons to modify it
2700                 $body = $item['body'];
2701
2702                 $rendered_hash = $item['rendered-hash'] ?? '';
2703                 $rendered_html = $item['rendered-html'] ?? '';
2704
2705                 if ($rendered_hash == ''
2706                         || $rendered_html == ''
2707                         || $rendered_hash != hash('md5', BBCode::VERSION . '::' . $body)
2708                         || DI::config()->get('system', 'ignore_cache')
2709                 ) {
2710                         self::addRedirToImageTags($item);
2711
2712                         $item['rendered-html'] = BBCode::convertForUriId($item['uri-id'], $item['body']);
2713                         $item['rendered-hash'] = hash('md5', BBCode::VERSION . '::' . $body);
2714
2715                         $hook_data = ['item' => $item, 'rendered-html' => $item['rendered-html'], 'rendered-hash' => $item['rendered-hash']];
2716                         Hook::callAll('put_item_in_cache', $hook_data);
2717                         $item['rendered-html'] = $hook_data['rendered-html'];
2718                         $item['rendered-hash'] = $hook_data['rendered-hash'];
2719                         unset($hook_data);
2720
2721                         // Update if the generated values differ from the existing ones
2722                         if ((($rendered_hash != $item['rendered-hash']) || ($rendered_html != $item['rendered-html'])) && !empty($item['id'])) {
2723                                 self::update(
2724                                         [
2725                                                 'rendered-html' => $item['rendered-html'],
2726                                                 'rendered-hash' => $item['rendered-hash']
2727                                         ],
2728                                         ['id' => $item['id']]
2729                                 );
2730                         }
2731                 }
2732
2733                 $item['body'] = $body;
2734         }
2735
2736         /**
2737          * Find any non-embedded images in private items and add redir links to them
2738          *
2739          * @param array &$item The field array of an item row
2740          */
2741         private static function addRedirToImageTags(array &$item)
2742         {
2743                 $app = DI::app();
2744
2745                 $matches = [];
2746                 $cnt = preg_match_all('|\[img\](http[^\[]*?/photo/[a-fA-F0-9]+?(-[0-9]\.[\w]+?)?)\[\/img\]|', $item['body'], $matches, PREG_SET_ORDER);
2747                 if ($cnt) {
2748                         foreach ($matches as $mtch) {
2749                                 if (strpos($mtch[1], '/redir') !== false) {
2750                                         continue;
2751                                 }
2752
2753                                 if ((local_user() == $item['uid']) && ($item['private'] == self::PRIVATE) && ($item['contact-id'] != $app->getContactId()) && ($item['network'] == Protocol::DFRN)) {
2754                                         $img_url = 'redir/' . $item['contact-id'] . '?url=' . urlencode($mtch[1]);
2755                                         $item['body'] = str_replace($mtch[0], '[img]' . $img_url . '[/img]', $item['body']);
2756                                 }
2757                         }
2758                 }
2759         }
2760
2761         /**
2762          * Given an item array, convert the body element from bbcode to html and add smilie icons.
2763          * If attach is true, also add icons for item attachments.
2764          *
2765          * @param array   $item
2766          * @param boolean $attach
2767          * @param boolean $is_preview
2768          * @return string item body html
2769          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
2770          * @throws \ImagickException
2771          * @hook  prepare_body_init item array before any work
2772          * @hook  prepare_body_content_filter ('item'=>item array, 'filter_reasons'=>string array) before first bbcode to html
2773          * @hook  prepare_body ('item'=>item array, 'html'=>body string, 'is_preview'=>boolean, 'filter_reasons'=>string array) after first bbcode to html
2774          * @hook  prepare_body_final ('item'=>item array, 'html'=>body string) after attach icons and blockquote special case handling (spoiler, author)
2775          */
2776         public static function prepareBody(array &$item, $attach = false, $is_preview = false)
2777         {
2778                 $a = DI::app();
2779                 Hook::callAll('prepare_body_init', $item);
2780
2781                 // In order to provide theme developers more possibilities, event items
2782                 // are treated differently.
2783                 if ($item['object-type'] === Activity\ObjectType::EVENT && isset($item['event-id'])) {
2784                         $ev = Event::getItemHTML($item);
2785                         return $ev;
2786                 }
2787
2788                 $tags = Tag::populateFromItem($item);
2789
2790                 $item['tags'] = $tags['tags'];
2791                 $item['hashtags'] = $tags['hashtags'];
2792                 $item['mentions'] = $tags['mentions'];
2793
2794                 $body = $item['body'] ?? '';
2795                 $shared = BBCode::fetchShareAttributes($body);
2796                 if (!empty($shared['guid'])) {
2797                         $shared_item = Post::selectFirst(['uri-id', 'plink'], ['guid' => $shared['guid']]);
2798                         $shared_uri_id = $shared_item['uri-id'] ?? 0;
2799                         $shared_links = [strtolower($shared_item['plink'] ?? '')];
2800                         $shared_attachments = Post\Media::splitAttachments($shared_uri_id, $shared['guid']);
2801                         $shared_links = array_merge($shared_links, array_column($shared_attachments['visual'], 'url'));
2802                         $shared_links = array_merge($shared_links, array_column($shared_attachments['link'], 'url'));
2803                         $shared_links = array_merge($shared_links, array_column($shared_attachments['additional'], 'url'));
2804                         $item['body'] = self::replaceVisualAttachments($shared_attachments, $item['body']);
2805                 } else {
2806                         $shared_uri_id = 0;
2807                         $shared_links = [];
2808                 }
2809                 $attachments = Post\Media::splitAttachments($item['uri-id'], $item['guid'] ?? '', $shared_links);
2810                 $item['body'] = self::replaceVisualAttachments($attachments, $item['body'] ?? '');
2811
2812                 $item['body'] = preg_replace("/\s*\[attachment .*?\].*?\[\/attachment\]\s*/ism", "\n", $item['body']);
2813                 self::putInCache($item);
2814                 $item['body'] = $body;
2815                 $s = $item["rendered-html"];
2816
2817                 // Compile eventual content filter reasons
2818                 $filter_reasons = [];
2819                 if (!$is_preview && public_contact() != $item['author-id']) {
2820                         if (!empty($item['content-warning']) && (!local_user() || !DI::pConfig()->get(local_user(), 'system', 'disable_cw', false))) {
2821                                 $filter_reasons[] = DI::l10n()->t('Content warning: %s', $item['content-warning']);
2822                         }
2823
2824                         $item['attachments'] = $attachments;
2825
2826                         $hook_data = [
2827                                 'item' => $item,
2828                                 'filter_reasons' => $filter_reasons
2829                         ];
2830                         Hook::callAll('prepare_body_content_filter', $hook_data);
2831                         $filter_reasons = $hook_data['filter_reasons'];
2832                         unset($hook_data);
2833                 }
2834
2835                 $hook_data = [
2836                         'item' => $item,
2837                         'html' => $s,
2838                         'preview' => $is_preview,
2839                         'filter_reasons' => $filter_reasons
2840                 ];
2841                 Hook::callAll('prepare_body', $hook_data);
2842                 $s = $hook_data['html'];
2843                 unset($hook_data);
2844
2845                 if (!$attach) {
2846                         // Replace the blockquotes with quotes that are used in mails.
2847                         $mailquote = '<blockquote type="cite" class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">';
2848                         $s = str_replace(['<blockquote>', '<blockquote class="spoiler">', '<blockquote class="author">'], [$mailquote, $mailquote, $mailquote], $s);
2849                         return $s;
2850                 }
2851
2852                 if (!empty($shared_attachments)) {
2853                         $s = self::addVisualAttachments($shared_attachments, $item, $s, true);
2854                         $s = self::addLinkAttachment($shared_uri_id ?: $item['uri-id'], $shared_attachments, $body, $s, true, []);
2855                         $s = self::addNonVisualAttachments($shared_attachments, $item, $s, true);
2856                         $body = preg_replace("/\s*\[share .*?\].*?\[\/share\]\s*/ism", '', $body);
2857                 }
2858
2859                 $s = self::addVisualAttachments($attachments, $item, $s, false);
2860                 $s = self::addLinkAttachment($item['uri-id'], $attachments, $body, $s, false, $shared_links);
2861                 $s = self::addNonVisualAttachments($attachments, $item, $s, false);
2862
2863                 // Map.
2864                 if (strpos($s, '<div class="map">') !== false && !empty($item['coord'])) {
2865                         $x = Map::byCoordinates(trim($item['coord']));
2866                         if ($x) {
2867                                 $s = preg_replace('/\<div class\=\"map\"\>/', '$0' . $x, $s);
2868                         }
2869                 }
2870
2871                 // Replace friendica image url size with theme preference.
2872                 if (!empty($a->getThemeInfoValue('item_image_size'))) {
2873                         $ps = $a->getThemeInfoValue('item_image_size');
2874                         $s = preg_replace('|(<img[^>]+src="[^"]+/photo/[0-9a-f]+)-[0-9]|', "$1-" . $ps, $s);
2875                 }
2876
2877                 $s = HTML::applyContentFilter($s, $filter_reasons);
2878
2879                 $hook_data = ['item' => $item, 'html' => $s];
2880                 Hook::callAll('prepare_body_final', $hook_data);
2881
2882                 return $hook_data['html'];
2883         }
2884
2885         /**
2886          * Check if the body contains a link
2887          *
2888          * @param string $body
2889          * @param string $url
2890          * @param int    $type
2891          * @return bool
2892          */
2893         public static function containsLink(string $body, string $url, int $type = 0)
2894         {
2895                 // Make sure that for example site parameters aren't used when testing if the link is contained in the body
2896                 $urlparts = parse_url($url);
2897                 unset($urlparts['query']);
2898                 unset($urlparts['fragment']);
2899                 $url = Network::unparseURL($urlparts);
2900
2901                 // Remove media links to only search in embedded content
2902                 // @todo Check images for image link, audio for audio links, ...
2903                 if (in_array($type, [Post\Media::AUDIO, Post\Media::VIDEO, Post\Media::IMAGE])) {
2904                         $body = preg_replace("/\[url=[^\[\]]*\](.*)\[\/url\]/Usi", ' $1 ', $body);
2905                 }
2906
2907                 if (strpos($body, $url)) {
2908                         return true;
2909                 }
2910                 foreach ([0, 1, 2] as $size) {
2911                         if (preg_match('#/photo/.*-' . $size . '\.#ism', $url) &&
2912                                 strpos(preg_replace('#(/photo/.*)-[012]\.#ism', '$1-' . $size . '.', $body), $url)) {
2913                                 return true;
2914                         }
2915                 }
2916                 return false;
2917         }
2918
2919         /**
2920          * Replace visual attachments in the body
2921          *
2922          * @param array $attachments
2923          * @param string $body
2924          * @return string modified body
2925          */
2926         private static function replaceVisualAttachments(array $attachments, string $body)
2927         {
2928                 DI::profiler()->startRecording('rendering');
2929
2930                 foreach ($attachments['visual'] as $attachment) {
2931                         if (!empty($attachment['preview'])) {
2932                                 $body = str_replace($attachment['preview'], Post\Media::getPreviewUrlForId($attachment['id'], Proxy::SIZE_LARGE), $body);
2933                         } elseif ($attachment['filetype'] == 'image') {
2934                                 $body = str_replace($attachment['url'], Post\Media::getUrlForId($attachment['id']), $body);
2935                         }
2936                 }
2937                 DI::profiler()->stopRecording();
2938                 return $body;
2939         }
2940
2941         /**
2942          * Add visual attachments to the content
2943          *
2944          * @param array $attachments
2945          * @param array $item
2946          * @param string $content
2947          * @return string modified content
2948          */
2949         private static function addVisualAttachments(array $attachments, array $item, string $content, bool $shared)
2950         {
2951                 DI::profiler()->startRecording('rendering');
2952                 $leading = '';
2953                 $trailing = '';
2954
2955                 // @todo In the future we should make a single for the template engine with all media in it. This allows more flexibilty.
2956                 foreach ($attachments['visual'] as $attachment) {
2957                         if (self::containsLink($item['body'], $attachment['preview'] ?? $attachment['url'], $attachment['type'])) {
2958                                 continue;
2959                         }
2960
2961                         if (!empty($attachment['preview'])) {
2962                                 $preview_url = Post\Media::getPreviewUrlForId($attachment['id'], Proxy::SIZE_LARGE);
2963                         } else {
2964                                 $preview_url = '';
2965                         }
2966
2967                         if (($attachment['filetype'] == 'video')) {
2968                                 /// @todo Move the template to /content as well
2969                                 $media = Renderer::replaceMacros(Renderer::getMarkupTemplate('video_top.tpl'), [
2970                                         '$video' => [
2971                                                 'id'      => $attachment['id'],
2972                                                 'src'     => $attachment['url'],
2973                                                 'name'    => $attachment['name'] ?: $attachment['url'],
2974                                                 'preview' => $preview_url,
2975                                                 'mime'    => $attachment['mimetype'],
2976                                         ],
2977                                 ]);
2978                                 if (($item['post-type'] ?? null) == Item::PT_VIDEO) {
2979                                         $leading .= $media;
2980                                 } else {
2981                                         $trailing .= $media;
2982                                 }
2983                         } elseif ($attachment['filetype'] == 'audio') {
2984                                 $media = Renderer::replaceMacros(Renderer::getMarkupTemplate('content/audio.tpl'), [
2985                                         '$audio' => [
2986                                                 'id'     => $attachment['id'],
2987                                                 'src'    => $attachment['url'],
2988                                                 'name'   => $attachment['name'] ?: $attachment['url'],
2989                                                 'mime'   => $attachment['mimetype'],
2990                                         ],
2991                                 ]);
2992                                 if (($item['post-type'] ?? null) == Item::PT_AUDIO) {
2993                                         $leading .= $media;
2994                                 } else {
2995                                         $trailing .= $media;
2996                                 }
2997                         } elseif ($attachment['filetype'] == 'image') {
2998                                 $media = Renderer::replaceMacros(Renderer::getMarkupTemplate('content/image.tpl'), [
2999                                         '$image' => [
3000                                                 'src'        => Post\Media::getUrlForId($attachment['id']),
3001                                                 'preview'    => Post\Media::getPreviewUrlForId($attachment['id'], ($attachment['width'] > $attachment['height']) ? Proxy::SIZE_MEDIUM : Proxy::SIZE_LARGE),
3002                                                 'attachment' => $attachment,
3003                                         ],
3004                                 ]);
3005                                 // On Diaspora posts the attached pictures are leading
3006                                 if ($item['network'] == Protocol::DIASPORA) {
3007                                         $leading .= $media;
3008                                 } else {
3009                                         $trailing .= $media;
3010                                 }
3011                         }
3012                 }
3013
3014                 if ($shared) {
3015                         $content = str_replace(BBCode::TOP_ANCHOR, '<div class="body-attach">' . $leading . '<div class="clear"></div></div>' . BBCode::TOP_ANCHOR, $content);
3016                         $content = str_replace(BBCode::BOTTOM_ANCHOR, '<div class="body-attach">' . $trailing . '<div class="clear"></div></div>' . BBCode::BOTTOM_ANCHOR, $content);
3017                 } else {
3018                         if ($leading != '') {
3019                                 $content = '<div class="body-attach">' . $leading . '<div class="clear"></div></div>' . $content;
3020                         }
3021
3022                         if ($trailing != '') {
3023                                 $content .= '<div class="body-attach">' . $trailing . '<div class="clear"></div></div>';
3024                         }
3025                 }
3026
3027                 DI::profiler()->stopRecording();
3028                 return $content;
3029         }
3030
3031         /**
3032          * Add link attachment to the content
3033          *
3034          * @param array  $attachments
3035          * @param string $body
3036          * @param string $content
3037          * @param bool   $shared
3038          * @param array  $ignore_links A list of URLs to ignore
3039          * @return string modified content
3040          */
3041         private static function addLinkAttachment(int $uriid, array $attachments, string $body, string $content, bool $shared, array $ignore_links)
3042         {
3043                 DI::profiler()->startRecording('rendering');
3044                 // Don't show a preview when there is a visual attachment (audio or video)
3045                 $types = array_column($attachments['visual'], 'type');
3046                 $preview = !in_array(Post\Media::IMAGE, $types) && !in_array(Post\Media::VIDEO, $types);
3047
3048                 if (!empty($attachments['link'])) {
3049                         foreach ($attachments['link'] as $link) {
3050                                 $found = false;
3051                                 foreach ($ignore_links as $ignore_link) {
3052                                         if (Strings::compareLink($link['url'], $ignore_link)) {
3053                                                 $found = true;
3054                                         }
3055                                 }
3056                                 // @todo Judge between the links to use the one with most information
3057                                 if (!$found && (empty($attachment) || !empty($link['author-name']) ||
3058                                         (empty($attachment['name']) && !empty($link['name'])) ||
3059                                         (empty($attachment['description']) && !empty($link['description'])) ||
3060                                         (empty($attachment['preview']) && !empty($link['preview'])))) {
3061                                         $attachment = $link;
3062                                 }
3063                         }
3064                 }
3065
3066                 if (!empty($attachment)) {
3067                         $data = [
3068                                 'after' => '',
3069                                 'author_name' => $attachment['author-name'] ?? '',
3070                                 'author_url' =>  $attachment['author-url'] ?? '',
3071                                 'description' => $attachment['description'] ?? '',
3072                                 'image' => '',
3073                                 'preview' => '',
3074                                 'provider_name' => $attachment['publisher-name'] ?? '',
3075                                 'provider_url' => $attachment['publisher-url'] ?? '',
3076                                 'text' => '',
3077                                 'title' => $attachment['name'] ?? '',
3078                                 'type' => 'link',
3079                                 'url' => $attachment['url']];
3080
3081                         if ($preview && !empty($attachment['preview'])) {
3082                                 if ($attachment['preview-width'] >= 500) {
3083                                         $data['image'] = Post\Media::getPreviewUrlForId($attachment['id'], Proxy::SIZE_MEDIUM);
3084                                 } else {
3085                                         $data['preview'] = Post\Media::getPreviewUrlForId($attachment['id'], Proxy::SIZE_MEDIUM);
3086                                 }
3087                         }
3088
3089                         if (!empty($data['description']) && !empty($content)) {
3090                                 similar_text($data['description'], $content, $percent);
3091                         } else {
3092                                 $percent = 0;
3093                         }
3094
3095                         if (!empty($data['description']) && (($data['title'] == $data['description']) || ($percent > 95) || (strpos($content, $data['description']) !== false))) {
3096                                 $data['description'] = '';
3097                         }
3098
3099                         if (($data['author_name'] ?? '') == ($data['provider_name'] ?? '')) {
3100                                 $data['author_name'] = '';
3101                         }
3102
3103                         if (($data['author_url'] ?? '') == ($data['provider_url'] ?? '')) {
3104                                 $data['author_url'] = '';
3105                         }
3106                 } elseif (preg_match("/.*(\[attachment.*?\].*?\[\/attachment\]).*/ism", $body, $match)) {
3107                         $data = BBCode::getAttachmentData($match[1]);
3108                 }
3109                 DI::profiler()->stopRecording();
3110
3111                 if (isset($data['url']) && !in_array($data['url'], $ignore_links)) {
3112                         if (!empty($data['description']) || !empty($data['image']) || !empty($data['preview'])) {
3113                                 $parts = parse_url($data['url']);
3114                                 if (!empty($parts['scheme']) && !empty($parts['host'])) {
3115                                         if (empty($data['provider_name'])) {
3116                                                 $data['provider_name'] = $parts['host'];
3117                                         }
3118                                         if (empty($data['provider_url']) || empty(parse_url($data['provider_url'], PHP_URL_SCHEME))) {
3119                                                 $data['provider_url'] = $parts['scheme'] . '://' . $parts['host'];
3120
3121                                                 if (!empty($parts['port'])) {
3122                                                         $data['provider_url'] .= ':' . $parts['port'];
3123                                                 }
3124                                         }
3125                                 }
3126
3127                                 // @todo Use a template
3128                                 $rendered = BBCode::convertAttachment('', BBCode::INTERNAL, false, $data, $uriid);
3129                         } elseif (!self::containsLink($content, $data['url'], Post\Media::HTML)) {
3130                                 $rendered = Renderer::replaceMacros(Renderer::getMarkupTemplate('content/link.tpl'), [
3131                                         '$url'  => $data['url'],
3132                                         '$title' => $data['title'],
3133                                 ]);
3134                         } else {
3135                                 return $content;
3136                         }
3137
3138                         if ($shared) {
3139                                 return str_replace(BBCode::BOTTOM_ANCHOR, BBCode::BOTTOM_ANCHOR . $rendered, $content);
3140                         } else {
3141                                 return $content . $rendered;
3142                         }
3143                 }
3144                 return $content;
3145         }
3146
3147         /**
3148          * Add non visual attachments to the content
3149          *
3150          * @param array $attachments
3151          * @param array $item
3152          * @param string $content
3153          * @return string modified content
3154          */
3155         private static function addNonVisualAttachments(array $attachments, array $item, string $content)
3156         {
3157                 DI::profiler()->startRecording('rendering');
3158                 $trailing = '';
3159                 foreach ($attachments['additional'] as $attachment) {
3160                         if (strpos($item['body'], $attachment['url'])) {
3161                                 continue;
3162                         }
3163
3164                         $author = ['uid' => 0, 'id' => $item['author-id'],
3165                                 'network' => $item['author-network'], 'url' => $item['author-link']];
3166                         $the_url = Contact::magicLinkByContact($author, $attachment['url']);
3167
3168                         $title = Strings::escapeHtml(trim(($attachment['description'] ?? '') ?: $attachment['url']));
3169
3170                         if (!empty($attachment['size'])) {
3171                                 $title .= ' ' . $attachment['size'] . ' ' . DI::l10n()->t('bytes');
3172                         }
3173
3174                         /// @todo Use a template
3175                         $icon = '<div class="attachtype icon s22 type-' . $attachment['filetype'] . ' subtype-' . $attachment['subtype'] . '"></div>';
3176                         $trailing .= '<a href="' . strip_tags($the_url) . '" title="' . $title . '" class="attachlink" target="_blank" rel="noopener noreferrer" >' . $icon . '</a>';
3177                 }
3178
3179                 if ($trailing != '') {
3180                         $content .= '<div class="body-attach">' . $trailing . '<div class="clear"></div></div>';
3181                 }
3182
3183                 DI::profiler()->stopRecording();
3184                 return $content;
3185         }
3186
3187         /**
3188          * get private link for item
3189          *
3190          * @param array $item
3191          * @return boolean|array False if item has not plink, otherwise array('href'=>plink url, 'title'=>translated title)
3192          * @throws \Exception
3193          */
3194         public static function getPlink($item)
3195         {
3196                 if (local_user()) {
3197                         $ret = [
3198                                 'href' => "display/" . $item['guid'],
3199                                 'orig' => "display/" . $item['guid'],
3200                                 'title' => DI::l10n()->t('View on separate page'),
3201                                 'orig_title' => DI::l10n()->t('View on separate page'),
3202                         ];
3203
3204                         if (!empty($item['plink'])) {
3205                                 $ret['href'] = DI::baseUrl()->remove($item['plink']);
3206                                 $ret['title'] = DI::l10n()->t('Link to source');
3207                         }
3208                 } elseif (!empty($item['plink']) && ($item['private'] != self::PRIVATE)) {
3209                         $ret = [
3210                                 'href' => $item['plink'],
3211                                 'orig' => $item['plink'],
3212                                 'title' => DI::l10n()->t('Link to source'),
3213                                 'orig_title' => DI::l10n()->t('Link to source'),
3214                         ];
3215                 } else {
3216                         $ret = [];
3217                 }
3218
3219                 return $ret;
3220         }
3221
3222         /**
3223          * Does the given uri-id belongs to a post that is sent as starting post to a forum?
3224          *
3225          * @param int $uri_id
3226          *
3227          * @return boolean "true" when it is a forum post
3228          */
3229         public static function isForumPost(int $uri_id)
3230         {
3231                 foreach (Tag::getByURIId($uri_id, [Tag::EXCLUSIVE_MENTION]) as $tag) {
3232                         if (DBA::exists('contact', ['uid' => 0, 'nurl' => Strings::normaliseLink($tag['url']), 'contact-type' => Contact::TYPE_COMMUNITY])) {
3233                                 return true;
3234                         }
3235                 }
3236                 return false;
3237         }
3238
3239         /**
3240          * Search item id for given URI or plink
3241          *
3242          * @param string $uri
3243          * @param integer $uid
3244          *
3245          * @return integer item id
3246          */
3247         public static function searchByLink($uri, $uid = 0)
3248         {
3249                 $ssl_uri = str_replace('http://', 'https://', $uri);
3250                 $uris = [$uri, $ssl_uri, Strings::normaliseLink($uri)];
3251
3252                 $item = Post::selectFirst(['id'], ['uri' => $uris, 'uid' => $uid]);
3253                 if (DBA::isResult($item)) {
3254                         return $item['id'];
3255                 }
3256
3257                 $item = Post::selectFirst(['id'], ['plink' => $uris, 'uid' => $uid]);
3258                 if (DBA::isResult($item)) {
3259                         return $item['id'];
3260                 }
3261
3262                 return 0;
3263         }
3264
3265         /**
3266          * Return the URI for a link to the post
3267          *
3268          * @param string $uri URI or link to post
3269          *
3270          * @return string URI
3271          */
3272         public static function getURIByLink(string $uri)
3273         {
3274                 $ssl_uri = str_replace('http://', 'https://', $uri);
3275                 $uris = [$uri, $ssl_uri, Strings::normaliseLink($uri)];
3276
3277                 $item = Post::selectFirst(['uri'], ['uri' => $uris]);
3278                 if (DBA::isResult($item)) {
3279                         return $item['uri'];
3280                 }
3281
3282                 $item = Post::selectFirst(['uri'], ['plink' => $uris]);
3283                 if (DBA::isResult($item)) {
3284                         return $item['uri'];
3285                 }
3286
3287                 return '';
3288         }
3289
3290         /**
3291          * Fetches item for given URI or plink
3292          *
3293          * @param string $uri
3294          * @param integer $uid
3295          *
3296          * @return integer item id
3297          */
3298         public static function fetchByLink(string $uri, int $uid = 0)
3299         {
3300                 Logger::info('Trying to fetch link', ['uid' => $uid, 'uri' => $uri]);
3301                 $item_id = self::searchByLink($uri, $uid);
3302                 if (!empty($item_id)) {
3303                         Logger::info('Link found', ['uid' => $uid, 'uri' => $uri, 'id' => $item_id]);
3304                         return $item_id;
3305                 }
3306
3307                 $hookData = [
3308                         'uri'     => $uri,
3309                         'uid'     => $uid,
3310                         'item_id' => null,
3311                 ];
3312
3313                 Hook::callAll('item_by_link', $hookData);
3314
3315                 if (isset($hookData['item_id'])) {
3316                         return is_numeric($hookData['item_id']) ? $hookData['item_id'] : 0;
3317                 }
3318
3319                 if ($fetched_uri = ActivityPub\Processor::fetchMissingActivity($uri)) {
3320                         $item_id = self::searchByLink($fetched_uri, $uid);
3321                 } else {
3322                         $item_id = Diaspora::fetchByURL($uri);
3323                 }
3324
3325                 if (!empty($item_id)) {
3326                         Logger::info('Link fetched', ['uid' => $uid, 'uri' => $uri, 'id' => $item_id]);
3327                         return $item_id;
3328                 }
3329
3330                 Logger::info('Link not found', ['uid' => $uid, 'uri' => $uri]);
3331                 return 0;
3332         }
3333
3334         /**
3335          * Return share data from an item array (if the item is shared item)
3336          * We are providing the complete Item array, because at some time in the future
3337          * we hopefully will define these values not in the body anymore but in some item fields.
3338          * This function is meant to replace all similar functions in the system.
3339          *
3340          * @param array $item
3341          *
3342          * @return array with share information
3343          */
3344         public static function getShareArray($item)
3345         {
3346                 if (!preg_match("/(.*?)\[share(.*?)\]\s?(.*?)\s?\[\/share\]\s?/ism", $item['body'], $matches)) {
3347                         return [];
3348                 }
3349
3350                 $attribute_string = $matches[2];
3351                 $attributes = ['comment' => trim($matches[1]), 'shared' => trim($matches[3])];
3352                 foreach (['author', 'profile', 'avatar', 'guid', 'posted', 'link'] as $field) {
3353                         if (preg_match("/$field=(['\"])(.+?)\\1/ism", $attribute_string, $matches)) {
3354                                 $attributes[$field] = trim(html_entity_decode($matches[2] ?? '', ENT_QUOTES, 'UTF-8'));
3355                         }
3356                 }
3357                 return $attributes;
3358         }
3359
3360         /**
3361          * Fetch item information for shared items from the original items and adds it.
3362          *
3363          * @param array $item
3364          *
3365          * @return array item array with data from the original item
3366          */
3367         public static function addShareDataFromOriginal(array $item)
3368         {
3369                 $shared = self::getShareArray($item);
3370                 if (empty($shared)) {
3371                         return $item;
3372                 }
3373
3374                 // Real reshares always have got a GUID.
3375                 if (empty($shared['guid'])) {
3376                         return $item;
3377                 }
3378
3379                 $uid = $item['uid'] ?? 0;
3380
3381                 // first try to fetch the item via the GUID. This will work for all reshares that had been created on this system
3382                 $shared_item = Post::selectFirst(['title', 'body'], ['guid' => $shared['guid'], 'uid' => [0, $uid]]);
3383                 if (!DBA::isResult($shared_item)) {
3384                         if (empty($shared['link'])) {
3385                                 return $item;
3386                         }
3387
3388                         // Otherwhise try to find (and possibly fetch) the item via the link. This should work for Diaspora and ActivityPub posts
3389                         $id = self::fetchByLink($shared['link'] ?? '', $uid);
3390                         if (empty($id)) {
3391                                 Logger::info('Original item not found', ['url' => $shared['link'] ?? '', 'callstack' => System::callstack()]);
3392                                 return $item;
3393                         }
3394
3395                         $shared_item = Post::selectFirst(['title', 'body'], ['id' => $id]);
3396                         if (!DBA::isResult($shared_item)) {
3397                                 return $item;
3398                         }
3399                         Logger::info('Got shared data from url', ['url' => $shared['link'], 'callstack' => System::callstack()]);
3400                 } else {
3401                         Logger::info('Got shared data from guid', ['guid' => $shared['guid'], 'callstack' => System::callstack()]);
3402                 }
3403
3404                 if (!empty($shared_item['title'])) {
3405                         $body = '[h3]' . $shared_item['title'] . "[/h3]\n" . $shared_item['body'];
3406                         unset($shared_item['title']);
3407                 } else {
3408                         $body = $shared_item['body'];
3409                 }
3410
3411                 $item['body'] = preg_replace("/\[share ([^\[\]]*)\].*\[\/share\]/ism", '[share $1]' . str_replace('$', '\$', $body) . '[/share]', $item['body']);
3412                 unset($shared_item['body']);
3413
3414                 return array_merge($item, $shared_item);
3415         }
3416
3417         /**
3418          * Check a prospective item array against user-level permissions
3419          *
3420          * @param array $item Expected keys: uri, gravity, and
3421          *                    author-link if is author-id is set,
3422          *                    owner-link if is owner-id is set,
3423          *                    causer-link if is causer-id is set.
3424          * @param int   $user_id Local user ID
3425          * @return bool
3426          * @throws \Exception
3427          */
3428         protected static function isAllowedByUser(array $item, int $user_id)
3429         {
3430                 if (!empty($item['author-id']) && Contact\User::isBlocked($item['author-id'], $user_id)) {
3431                         Logger::notice('Author is blocked by user', ['author-link' => $item['author-link'], 'uid' => $user_id, 'item-uri' => $item['uri']]);
3432                         return false;
3433                 }
3434
3435                 if (!empty($item['owner-id']) && Contact\User::isBlocked($item['owner-id'], $user_id)) {
3436                         Logger::notice('Owner is blocked by user', ['owner-link' => $item['owner-link'], 'uid' => $user_id, 'item-uri' => $item['uri']]);
3437                         return false;
3438                 }
3439
3440                 // The causer is set during a thread completion, for example because of a reshare. It countains the responsible actor.
3441                 if (!empty($item['causer-id']) && Contact\User::isBlocked($item['causer-id'], $user_id)) {
3442                         Logger::notice('Causer is blocked by user', ['causer-link' => $item['causer-link'] ?? $item['causer-id'], 'uid' => $user_id, 'item-uri' => $item['uri']]);
3443                         return false;
3444                 }
3445
3446                 if (!empty($item['causer-id']) && ($item['gravity'] === GRAVITY_PARENT) && Contact\User::isIgnored($item['causer-id'], $user_id)) {
3447                         Logger::notice('Causer is ignored by user', ['causer-link' => $item['causer-link'] ?? $item['causer-id'], 'uid' => $user_id, 'item-uri' => $item['uri']]);
3448                         return false;
3449                 }
3450
3451                 return true;
3452         }
3453
3454         /**
3455          * Improve the data in shared posts
3456          *
3457          * @param array $item
3458          * @return string body
3459          */
3460         public static function improveSharedDataInBody(array $item)
3461         {
3462                 $shared = BBCode::fetchShareAttributes($item['body']);
3463                 if (empty($shared['link'])) {
3464                         return $item['body'];
3465                 }
3466
3467                 $id = self::fetchByLink($shared['link']);
3468                 Logger::info('Fetched shared post', ['uri-id' => $item['uri-id'], 'id' => $id, 'author' => $shared['profile'], 'url' => $shared['link'], 'guid' => $shared['guid'], 'callstack' => System::callstack()]);
3469                 if (!$id) {
3470                         return $item['body'];
3471                 }
3472
3473                 $shared_item = Post::selectFirst(['author-name', 'author-link', 'author-avatar', 'plink', 'created', 'guid', 'title', 'body'], ['id' => $id]);
3474                 if (!DBA::isResult($shared_item)) {
3475                         return $item['body'];
3476                 }
3477
3478                 $shared_content = BBCode::getShareOpeningTag($shared_item['author-name'], $shared_item['author-link'], $shared_item['author-avatar'], $shared_item['plink'], $shared_item['created'], $shared_item['guid']);
3479
3480                 if (!empty($shared_item['title'])) {
3481                         $shared_content .= '[h3]'.$shared_item['title'].'[/h3]'."\n";
3482                 }
3483
3484                 $shared_content .= $shared_item['body'];
3485
3486                 $item['body'] = preg_replace("/\[share.*?\](.*)\[\/share\]/ism", $shared_content . '[/share]', $item['body']);
3487                 Logger::info('New shared data', ['uri-id' => $item['uri-id'], 'id' => $id, 'shared_item' => $shared_item]);
3488                 return $item['body'];
3489         }
3490 }