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\Util\Temporal;
  46 use Friendica\Worker\Delivery;
  47 use LanguageDetection\Language;
  48
  49 class Item
  50 {
  51         // Posting types, inspired by https://www.w3.org/TR/activitystreams-vocabulary/#object-types
  52         const PT_ARTICLE = 0;
  53         const PT_NOTE = 1;
  54         const PT_PAGE = 2;
  55         const PT_IMAGE = 16;
  56         const PT_AUDIO = 17;
  57         const PT_VIDEO = 18;
  58         const PT_DOCUMENT = 19;
  59         const PT_EVENT = 32;
  60         const PT_POLL = 33;
  61         const PT_PERSONAL_NOTE = 128;
  62
  63         // Posting reasons (Why had a post been stored for a user?)
  64         const PR_NONE = 0;
  65         const PR_TAG = 64;
  66         const PR_TO = 65;
  67         const PR_CC = 66;
  68         const PR_BTO = 67;
  69         const PR_BCC = 68;
  70         const PR_FOLLOWER = 69;
  71         const PR_ANNOUNCEMENT = 70;
  72         const PR_COMMENT = 71;
  73         const PR_STORED = 72;
  74         const PR_GLOBAL = 73;
  75         const PR_RELAY = 74;
  76         const PR_FETCHED = 75;
  77
  78         // system.accept_only_sharer setting values
  79         const COMPLETION_NONE    = 1;
  80         const COMPLETION_COMMENT = 0;
  81         const COMPLETION_LIKE    = 2;
  82
  83         // Field list that is used to display the items
  84         const DISPLAY_FIELDLIST = [
  85                 'uid', 'id', 'parent', 'guid', 'network', 'gravity',
  86                 'uri-id', 'uri', 'thr-parent-id', 'thr-parent', 'parent-uri-id', 'parent-uri', 'conversation',
  87                 'commented', 'created', 'edited', 'received', 'verb', 'object-type', 'postopts', 'plink',
  88                 'wall', 'private', 'starred', 'origin', 'parent-origin', 'title', 'body', 'language',
  89                 'content-warning', 'location', 'coord', 'app', 'rendered-hash', 'rendered-html', 'object',
  90                 'allow_cid', 'allow_gid', 'deny_cid', 'deny_gid', 'mention', 'global',
  91                 'author-id', 'author-link', 'author-name', 'author-avatar', 'author-network', 'author-updated', 'author-gsid', 'author-addr', 'author-uri-id',
  92                 'owner-id', 'owner-link', 'owner-name', 'owner-avatar', 'owner-network', 'owner-contact-type', 'owner-updated',
  93                 'causer-id', 'causer-link', 'causer-name', 'causer-avatar', 'causer-contact-type', 'causer-network',
  94                 'contact-id', 'contact-uid', 'contact-link', 'contact-name', 'contact-avatar',
  95                 'writable', 'self', 'cid', 'alias',
  96                 'event-created', 'event-edited', 'event-start', 'event-finish',
  97                 'event-summary', 'event-desc', 'event-location', 'event-type',
  98                 'event-nofinish', 'event-ignore', 'event-id',
  99                 'question-id', 'question-multiple', 'question-voters', 'question-end-time',
 100                 'has-categories', 'has-media',
 101                 'delivery_queue_count', 'delivery_queue_done', 'delivery_queue_failed'
 102         ];
 103
 104         // Field list that is used to deliver items via the protocols
 105         const DELIVER_FIELDLIST = ['uid', 'id', 'parent', 'uri-id', 'uri', 'thr-parent', 'parent-uri', 'guid',
 106                         'parent-guid', 'conversation', 'received', 'created', 'edited', 'verb', 'object-type', 'object', 'target',
 107                         'private', 'title', 'body', 'raw-body', 'location', 'coord', 'app',
 108                         'inform', 'deleted', 'extid', 'post-type', 'post-reason', 'gravity',
 109                         'allow_cid', 'allow_gid', 'deny_cid', 'deny_gid',
 110                         'author-id', 'author-link', 'author-name', 'author-avatar', 'owner-id', 'owner-link', 'contact-uid',
 111                         'signed_text', 'network', 'wall', 'contact-id', 'plink', 'origin',
 112                         'thr-parent-id', 'parent-uri-id', 'postopts', 'pubmail',
 113                         'event-created', 'event-edited', 'event-start', 'event-finish',
 114                         'event-summary', 'event-desc', 'event-location', 'event-type',
 115                         'event-nofinish', 'event-ignore', 'event-id'];
 116
 117         // All fields in the item table
 118         const ITEM_FIELDLIST = ['id', 'uid', 'parent', 'uri', 'parent-uri', 'thr-parent',
 119                         'guid', 'uri-id', 'parent-uri-id', 'thr-parent-id', 'conversation', 'vid',
 120                         'contact-id', 'wall', 'gravity', 'extid', 'psid',
 121                         'created', 'edited', 'commented', 'received', 'changed', 'verb',
 122                         'postopts', 'plink', 'resource-id', 'event-id', 'inform',
 123                         'allow_cid', 'allow_gid', 'deny_cid', 'deny_gid', 'post-type', 'post-reason',
 124                         'private', 'pubmail', 'visible', 'starred',
 125                         'unseen', 'deleted', 'origin', 'mention', 'global', 'network',
 126                         'title', 'content-warning', 'body', 'location', 'coord', 'app',
 127                         'rendered-hash', 'rendered-html', 'object-type', 'object', 'target-type', 'target',
 128                         'author-id', 'author-link', 'author-name', 'author-avatar', 'author-network',
 129                         'owner-id', 'owner-link', 'owner-name', 'owner-avatar', 'causer-id'];
 130
 131         // List of all verbs that don't need additional content data.
 132         // Never reorder or remove entries from this list. Just add new ones at the end, if needed.
 133         const ACTIVITIES = [
 134                 Activity::LIKE, Activity::DISLIKE,
 135                 Activity::ATTEND, Activity::ATTENDNO, Activity::ATTENDMAYBE,
 136                 Activity::FOLLOW,
 137                 Activity::ANNOUNCE];
 138
 139         const PUBLIC = 0;
 140         const PRIVATE = 1;
 141         const UNLISTED = 2;
 142
 143         /**
 144          * Update existing item entries
 145          *
 146          * @param array $fields    The fields that are to be changed
 147          * @param array $condition The condition for finding the item entries
 148          *
 149          * In the future we may have to change permissions as well.
 150          * Then we had to add the user id as third parameter.
 151          *
 152          * A return value of "0" doesn't mean an error - but that 0 rows had been changed.
 153          *
 154          * @return integer|boolean number of affected rows - or "false" if there was an error
 155          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 156          */
 157         public static function update(array $fields, array $condition)
 158         {
 159                 if (empty($condition) || empty($fields)) {
 160                         return false;
 161                 }
 162
 163                 if (isset($fields['extid'])) {
 164                         $fields['external-id'] = ItemURI::getIdByURI($fields['extid']);
 165                 }
 166
 167                 if (!empty($fields['verb'])) {
 168                         $fields['vid'] = Verb::getID($fields['verb']);
 169                 }
 170
 171                 if (!empty($fields['edited'])) {
 172                         $previous = Post::selectFirst(['edited'], $condition);
 173                 }
 174
 175                 $rows = Post::update($fields, $condition);
 176                 if (is_bool($rows)) {
 177                         return $rows;
 178                 }
 179
 180                 // We only need to call the line by line update for specific fields
 181                 if (empty($fields['body']) && empty($fields['file']) &&
 182                         empty($fields['attach']) && empty($fields['edited'])) {
 183                         return $rows;
 184                 }
 185
 186                 Logger::info('Updating per single row method', ['fields' => $fields, 'condition' => $condition]);
 187
 188                 $items = Post::select(['id', 'origin', 'uri-id', 'uid', 'author-network'], $condition);
 189
 190                 $notify_items = [];
 191
 192                 while ($item = DBA::fetch($items)) {
 193                         if (!empty($fields['body'])) {
 194                                 Post\Media::insertFromAttachmentData($item['uri-id'], $fields['body']);
 195
 196                                 $content_fields = ['raw-body' => trim($fields['raw-body'] ?? $fields['body'])];
 197
 198                                 // Remove all media attachments from the body and store them in the post-media table
 199                                 // @todo On shared postings (Diaspora style and commented reshare) don't fetch content from the shared part
 200                                 $content_fields['raw-body'] = Post\Media::insertFromBody($item['uri-id'], $content_fields['raw-body']);
 201                                 $content_fields['raw-body'] = self::setHashtags($content_fields['raw-body']);
 202
 203                                 if ($item['author-network'] != Protocol::DFRN) {
 204                                         Post\Media::insertFromRelevantUrl($item['uri-id'], $content_fields['raw-body']);
 205                                 }
 206
 207                                 Post\Content::update($item['uri-id'], $content_fields);
 208                         }
 209
 210                         if (!empty($fields['file'])) {
 211                                 Post\Category::storeTextByURIId($item['uri-id'], $item['uid'], $fields['file']);
 212                         }
 213
 214                         if (!empty($fields['attach'])) {
 215                                 Post\Media::insertFromAttachment($item['uri-id'], $fields['attach']);
 216                         }
 217
 218                         // We only need to notfiy others when it is an original entry from us.
 219                         // Only call the notifier when the item had been edited and records had been changed.
 220                         if ($item['origin'] && !empty($fields['edited']) && ($previous['edited'] != $fields['edited'])) {
 221                                 $notify_items[] = $item['id'];
 222                         }
 223                 }
 224
 225                 DBA::close($items);
 226
 227                 foreach ($notify_items as $notify_item) {
 228                         $post = Post::selectFirst(['uri-id', 'uid'], ['id' => $notify_item]);
 229                         Worker::add(PRIORITY_HIGH, 'Notifier', Delivery::POST, (int)$post['uri-id'], (int)$post['uid']);
 230                 }
 231
 232                 return $rows;
 233         }
 234
 235         /**
 236          * Delete an item and notify others about it - if it was ours
 237          *
 238          * @param array   $condition The condition for finding the item entries
 239          * @param integer $priority  Priority for the notification
 240          * @return void
 241          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 242          */
 243         public static function markForDeletion(array $condition, int $priority = PRIORITY_HIGH)
 244         {
 245                 $items = Post::select(['id'], $condition);
 246                 while ($item = Post::fetch($items)) {
 247                         self::markForDeletionById($item['id'], $priority);
 248                 }
 249                 DBA::close($items);
 250         }
 251
 252         /**
 253          * Delete an item for an user and notify others about it - if it was ours
 254          *
 255          * @param array   $condition The condition for finding the item entries
 256          * @param integer $uid       User who wants to delete this item
 257          * @return void
 258          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 259          */
 260         public static function deleteForUser(array $condition, int $uid)
 261         {
 262                 if ($uid == 0) {
 263                         return;
 264                 }
 265
 266                 $items = Post::select(['id', 'uid', 'uri-id'], $condition);
 267                 while ($item = Post::fetch($items)) {
 268                         if (in_array($item['uid'], [$uid, 0])) {
 269                                 Post\User::update($item['uri-id'], $uid, ['hidden' => true], true);
 270                                 Post\ThreadUser::update($item['uri-id'], $uid, ['hidden' => true], true);
 271                         }
 272
 273                         if ($item['uid'] == $uid) {
 274                                 self::markForDeletionById($item['id'], PRIORITY_HIGH);
 275                         } elseif ($item['uid'] != 0) {
 276                                 Logger::notice('Wrong ownership. Not deleting item', ['id' => $item['id']]);
 277                         }
 278                 }
 279                 DBA::close($items);
 280         }
 281
 282         /**
 283          * Mark an item for deletion, delete related data and notify others about it - if it was ours
 284          *
 285          * @param integer $item_id
 286          * @param integer $priority Priority for the notification
 287          * @return boolean success
 288          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 289          */
 290         public static function markForDeletionById(int $item_id, int $priority = PRIORITY_HIGH): bool
 291         {
 292                 Logger::info('Mark item for deletion by id', ['id' => $item_id, 'callstack' => System::callstack()]);
 293                 // locate item to be deleted
 294                 $fields = ['id', 'uri', 'uri-id', 'uid', 'parent', 'parent-uri-id', 'origin',
 295                         'deleted', 'resource-id', 'event-id',
 296                         'verb', 'object-type', 'object', 'target', 'contact-id', 'psid', 'gravity'];
 297                 $item = Post::selectFirst($fields, ['id' => $item_id]);
 298                 if (!DBA::isResult($item)) {
 299                         Logger::info('Item not found.', ['id' => $item_id]);
 300                         return false;
 301                 }
 302
 303                 if ($item['deleted']) {
 304                         Logger::info('Item has already been marked for deletion.', ['id' => $item_id]);
 305                         return false;
 306                 }
 307
 308                 $parent = Post::selectFirst(['origin'], ['id' => $item['parent']]);
 309                 if (!DBA::isResult($parent)) {
 310                         $parent = ['origin' => false];
 311                 }
 312
 313                 // clean up categories and tags so they don't end up as orphans
 314                 Post\Category::deleteByURIId($item['uri-id'], $item['uid']);
 315
 316                 /*
 317                  * If item is a link to a photo resource, nuke all the associated photos
 318                  * (visitors will not have photo resources)
 319                  * This only applies to photos uploaded from the photos page. Photos inserted into a post do not
 320                  * generate a resource-id and therefore aren't intimately linked to the item.
 321                  */
 322                 /// @TODO: this should first check if photo is used elsewhere
 323                 if (strlen($item['resource-id'])) {
 324                         Photo::delete(['resource-id' => $item['resource-id'], 'uid' => $item['uid']]);
 325                 }
 326
 327                 // If item is a link to an event, delete the event.
 328                 if (intval($item['event-id'])) {
 329                         Event::delete($item['event-id']);
 330                 }
 331
 332                 // If item has attachments, drop them
 333                 $attachments = Post\Media::getByURIId($item['uri-id'], [Post\Media::DOCUMENT]);
 334                 foreach($attachments as $attachment) {
 335                         if (preg_match('|attach/(\d+)|', $attachment['url'], $matches)) {
 336                                 Attach::delete(['id' => $matches[1], 'uid' => $item['uid']]);
 337                         }
 338                 }
 339
 340                 // Set the item to "deleted"
 341                 $item_fields = ['deleted' => true, 'edited' => DateTimeFormat::utcNow(), 'changed' => DateTimeFormat::utcNow()];
 342                 Post::update($item_fields, ['id' => $item['id']]);
 343
 344                 Post\Category::storeTextByURIId($item['uri-id'], $item['uid'], '');
 345
 346                 if (!Post::exists(["`uri-id` = ? AND `uid` != 0 AND NOT `deleted`", $item['uri-id']])) {
 347                         self::markForDeletion(['uri-id' => $item['uri-id'], 'uid' => 0, 'deleted' => false], $priority);
 348                 }
 349
 350                 Post\DeliveryData::delete($item['uri-id']);
 351
 352                 // If it's the parent of a comment thread, kill all the kids
 353                 if ($item['gravity'] == GRAVITY_PARENT) {
 354                         self::markForDeletion(['parent' => $item['parent'], 'deleted' => false], $priority);
 355                 }
 356
 357                 // Is it our comment and/or our thread?
 358                 if (($item['origin'] || $parent['origin']) && ($item['uid'] != 0)) {
 359                         // When we delete the original post we will delete all existing copies on the server as well
 360                         self::markForDeletion(['uri-id' => $item['uri-id'], 'deleted' => false], $priority);
 361
 362                         // send the notification upstream/downstream
 363                         if ($priority) {
 364                                 Worker::add(['priority' => $priority, 'dont_fork' => true], 'Notifier', Delivery::DELETION, (int)$item['uri-id'], (int)$item['uid']);
 365                         }
 366                 } elseif ($item['uid'] != 0) {
 367                         Post\User::update($item['uri-id'], $item['uid'], ['hidden' => true]);
 368                         Post\ThreadUser::update($item['uri-id'], $item['uid'], ['hidden' => true]);
 369                 }
 370
 371                 Logger::info('Item has been marked for deletion.', ['id' => $item_id]);
 372
 373                 return true;
 374         }
 375
 376         /**
 377          * Get guid from given item record
 378          *
 379          * @param array $item Item record
 380          * @param bool Whether to notify (?)
 381          * @return string Guid
 382          */
 383         public static function guid(array $item, bool $notify): string
 384         {
 385                 if (!empty($item['guid'])) {
 386                         return trim($item['guid']);
 387                 }
 388
 389                 if ($notify) {
 390                         // We have to avoid duplicates. So we create the GUID in form of a hash of the plink or uri.
 391                         // We add the hash of our own host because our host is the original creator of the post.
 392                         $prefix_host = DI::baseUrl()->getHostname();
 393                 } else {
 394                         $prefix_host = '';
 395
 396                         // We are only storing the post so we create a GUID from the original hostname.
 397                         if (!empty($item['author-link'])) {
 398                                 $parsed = parse_url($item['author-link']);
 399                                 if (!empty($parsed['host'])) {
 400                                         $prefix_host = $parsed['host'];
 401                                 }
 402                         }
 403
 404                         if (empty($prefix_host) && !empty($item['plink'])) {
 405                                 $parsed = parse_url($item['plink']);
 406                                 if (!empty($parsed['host'])) {
 407                                         $prefix_host = $parsed['host'];
 408                                 }
 409                         }
 410
 411                         if (empty($prefix_host) && !empty($item['uri'])) {
 412                                 $parsed = parse_url($item['uri']);
 413                                 if (!empty($parsed['host'])) {
 414                                         $prefix_host = $parsed['host'];
 415                                 }
 416                         }
 417
 418                         // Is it in the format data@host.tld? - Used for mail contacts
 419                         if (empty($prefix_host) && !empty($item['author-link']) && strstr($item['author-link'], '@')) {
 420                                 $mailparts = explode('@', $item['author-link']);
 421                                 $prefix_host = array_pop($mailparts);
 422                         }
 423                 }
 424
 425                 if (!empty($item['plink'])) {
 426                         $guid = self::guidFromUri($item['plink'], $prefix_host);
 427                 } elseif (!empty($item['uri'])) {
 428                         $guid = self::guidFromUri($item['uri'], $prefix_host);
 429                 } else {
 430                         $guid = System::createUUID(hash('crc32', $prefix_host));
 431                 }
 432
 433                 return $guid;
 434         }
 435
 436         /**
 437          * Returns contact id from given item record
 438          *
 439          * @param array $item Item record
 440          * @return int Contact id
 441          */
 442         private static function contactId(array $item): int
 443         {
 444                 if (!empty($item['contact-id']) && DBA::exists('contact', ['self' => true, 'id' => $item['contact-id']])) {
 445                         return $item['contact-id'];
 446                 } elseif (($item['gravity'] == GRAVITY_PARENT) && !empty($item['uid']) && !empty($item['contact-id']) && Contact::isSharing($item['contact-id'], $item['uid'])) {
 447                         return $item['contact-id'];
 448                 } elseif (!empty($item['uid']) && !Contact::isSharing($item['author-id'], $item['uid'])) {
 449                         return $item['author-id'];
 450                 } elseif (!empty($item['contact-id'])) {
 451                         return $item['contact-id'];
 452                 } else {
 453                         $contact_id = Contact::getIdForURL($item['author-link'], $item['uid']);
 454                         if (!empty($contact_id)) {
 455                                 return $contact_id;
 456                         }
 457                 }
 458                 return $item['author-id'];
 459         }
 460
 461         /**
 462          * Write an item array into a spool file to be inserted later.
 463          * This command is called whenever there are issues storing an item.
 464          *
 465          * @param array $item The item fields that are to be inserted
 466          * @throws \Exception
 467          */
 468         private static function spool(array $item)
 469         {
 470                 // Now we store the data in the spool directory
 471                 // We use "microtime" to keep the arrival order and "mt_rand" to avoid duplicates
 472                 $file = 'item-' . round(microtime(true) * 10000) . '-' . mt_rand() . '.msg';
 473
 474                 $spoolpath = System::getSpoolPath();
 475                 if ($spoolpath != '') {
 476                         $spool = $spoolpath . '/' . $file;
 477
 478                         file_put_contents($spool, json_encode($item));
 479                         Logger::warning("Item wasn't stored - Item was spooled into file", ['file' => $file]);
 480                 }
 481         }
 482
 483         /**
 484          * Check if the item array is a duplicate
 485          *
 486          * @param array $item Item record
 487          * @return boolean is it a duplicate?
 488          */
 489         private static function isDuplicate(array $item): bool
 490         {
 491                 // Checking if there is already an item with the same guid
 492                 $condition = ['guid' => $item['guid'], 'network' => $item['network'], 'uid' => $item['uid']];
 493                 if (Post::exists($condition)) {
 494                         Logger::notice('Found already existing item', $condition);
 495                         return true;
 496                 }
 497
 498                 $condition = ['uri-id' => $item['uri-id'], 'uid' => $item['uid'],
 499                         'network' => [$item['network'], Protocol::DFRN]];
 500                 if (Post::exists($condition)) {
 501                         Logger::notice('duplicated item with the same uri found.', $condition);
 502                         return true;
 503                 }
 504
 505                 // On Friendica and Diaspora the GUID is unique
 506                 if (in_array($item['network'], [Protocol::DFRN, Protocol::DIASPORA])) {
 507                         $condition = ['guid' => $item['guid'], 'uid' => $item['uid']];
 508                         if (Post::exists($condition)) {
 509                                 Logger::notice('duplicated item with the same guid found.', $condition);
 510                                 return true;
 511                         }
 512                 } elseif ($item['network'] == Protocol::OSTATUS) {
 513                         // Check for an existing post with the same content. There seems to be a problem with OStatus.
 514                         $condition = ["`body` = ? AND `network` = ? AND `created` = ? AND `contact-id` = ? AND `uid` = ?",
 515                                         $item['body'], $item['network'], $item['created'], $item['contact-id'], $item['uid']];
 516                         if (Post::exists($condition)) {
 517                                 Logger::notice('duplicated item with the same body found.', $item);
 518                                 return true;
 519                         }
 520                 }
 521
 522                 /*
 523                  * Check for already added items.
 524                  * There is a timing issue here that sometimes creates double postings.
 525                  * An unique index would help - but the limitations of MySQL (maximum size of index values) prevent this.
 526                  */
 527                 if (($item['uid'] == 0) && Post::exists(['uri-id' => $item['uri-id'], 'uid' => 0])) {
 528                         Logger::notice('Global item already stored.', ['uri-id' => $item['uri-id'], 'network' => $item['network']]);
 529                         return true;
 530                 }
 531
 532                 return false;
 533         }
 534
 535         /**
 536          * Check if the item array is valid
 537          *
 538          * @param array $item Item record
 539          * @return boolean item is valid
 540          */
 541         public static function isValid(array $item): bool
 542         {
 543                 // When there is no content then we don't post it
 544                 if (($item['body'] . $item['title'] == '') && (empty($item['uri-id']) || !Post\Media::existsByURIId($item['uri-id']))) {
 545                         Logger::notice('No body, no title.');
 546                         return false;
 547                 }
 548
 549                 if (!empty($item['uid'])) {
 550                         $owner = User::getOwnerDataById($item['uid'], false);
 551                         if (!$owner) {
 552                                 Logger::notice('Missing item user owner data', ['uid' => $item['uid']]);
 553                                 return false;
 554                         }
 555
 556                         if ($owner['account_expired'] || $owner['account_removed']) {
 557                                 Logger::notice('Item user has been deleted/expired/removed', ['uid' => $item['uid'], 'deleted' => $owner['deleted'], 'account_expired' => $owner['account_expired'], 'account_removed' => $owner['account_removed']]);
 558                                 return false;
 559                         }
 560                 }
 561
 562                 if (!empty($item['author-id']) && Contact::isBlocked($item['author-id'])) {
 563                         Logger::notice('Author is blocked node-wide', ['author-link' => $item['author-link'], 'item-uri' => $item['uri']]);
 564                         return false;
 565                 }
 566
 567                 if (!empty($item['author-link']) && Network::isUrlBlocked($item['author-link'])) {
 568                         Logger::notice('Author server is blocked', ['author-link' => $item['author-link'], 'item-uri' => $item['uri']]);
 569                         return false;
 570                 }
 571
 572                 if (!empty($item['owner-id']) && Contact::isBlocked($item['owner-id'])) {
 573                         Logger::notice('Owner is blocked node-wide', ['owner-link' => $item['owner-link'], 'item-uri' => $item['uri']]);
 574                         return false;
 575                 }
 576
 577                 if (!empty($item['owner-link']) && Network::isUrlBlocked($item['owner-link'])) {
 578                         Logger::notice('Owner server is blocked', ['owner-link' => $item['owner-link'], 'item-uri' => $item['uri']]);
 579                         return false;
 580                 }
 581
 582                 if (!empty($item['uid']) && !self::isAllowedByUser($item, $item['uid'])) {
 583                         return false;
 584                 }
 585
 586                 if ($item['verb'] == Activity::FOLLOW) {
 587                         if (!$item['origin'] && ($item['author-id'] == Contact::getPublicIdByUserId($item['uid']))) {
 588                                 // Our own follow request can be relayed to us. We don't store it to avoid notification chaos.
 589                                 Logger::info("Follow: Don't store not origin follow request", ['parent-uri' => $item['parent-uri']]);
 590                                 return false;
 591                         }
 592
 593                         $condition = ['verb' => Activity::FOLLOW, 'uid' => $item['uid'],
 594                                 'parent-uri' => $item['parent-uri'], 'author-id' => $item['author-id']];
 595                         if (Post::exists($condition)) {
 596                                 // It happens that we receive multiple follow requests by the same author - we only store one.
 597                                 Logger::info('Follow: Found existing follow request from author', ['author-id' => $item['author-id'], 'parent-uri' => $item['parent-uri']]);
 598                                 return false;
 599                         }
 600                 }
 601
 602                 return true;
 603         }
 604
 605         /**
 606          * Check if the item array is too old
 607          *
 608          * @param array $item Item record
 609          * @return boolean item is too old
 610          */
 611         public static function isTooOld(array $item): bool
 612         {
 613                 // check for create date and expire time
 614                 $expire_interval = DI::config()->get('system', 'dbclean-expire-days', 0);
 615
 616                 $user = DBA::selectFirst('user', ['expire'], ['uid' => $item['uid']]);
 617                 if (DBA::isResult($user) && ($user['expire'] > 0) && (($user['expire'] < $expire_interval) || ($expire_interval == 0))) {
 618                         $expire_interval = $user['expire'];
 619                 }
 620
 621                 if (($expire_interval > 0) && !empty($item['created'])) {
 622                         $expire_date = time() - ($expire_interval * 86400);
 623                         $created_date = strtotime($item['created']);
 624                         if ($created_date < $expire_date) {
 625                                 Logger::notice('Item created before expiration interval.', [
 626                                         'created' => date('c', $created_date),
 627                                         'expired' => date('c', $expire_date),
 628                                         '$item' => $item
 629                                 ]);
 630                                 return true;
 631                         }
 632                 }
 633
 634                 return false;
 635         }
 636
 637         /**
 638          * Return the id of the given item array if it has been stored before
 639          *
 640          * @param array $item Item record
 641          * @return integer Item id or zero on error
 642          */
 643         private static function getDuplicateID(array $item): int
 644         {
 645                 if (empty($item['network']) || in_array($item['network'], Protocol::FEDERATED)) {
 646                         $condition = ['`uri-id` = ? AND `uid` = ? AND `network` IN (?, ?, ?, ?)',
 647                                 $item['uri-id'],
 648                                 $item['uid'],
 649                                 Protocol::ACTIVITYPUB,
 650                                 Protocol::DIASPORA,
 651                                 Protocol::DFRN,
 652                                 Protocol::OSTATUS
 653                         ];
 654                         $existing = Post::selectFirst(['id', 'network'], $condition);
 655                         if (DBA::isResult($existing)) {
 656                                 // We only log the entries with a different user id than 0. Otherwise we would have too many false positives
 657                                 if ($item['uid'] != 0) {
 658                                         Logger::notice('Item already existed for user', [
 659                                                 'uri-id' => $item['uri-id'],
 660                                                 'uid' => $item['uid'],
 661                                                 'network' => $item['network'],
 662                                                 'existing_id' => $existing['id'],
 663                                                 'existing_network' => $existing['network']
 664                                         ]);
 665                                 }
 666
 667                                 return $existing['id'];
 668                         }
 669                 }
 670                 return 0;
 671         }
 672
 673         /**
 674          * Fetch top-level parent data for the given item array
 675          *
 676          * @param array $item
 677          * @return array item array with parent data
 678          * @throws \Exception
 679          */
 680         private static function getTopLevelParent(array $item): array
 681         {
 682                 $fields = ['uid', 'uri', 'parent-uri', 'id', 'deleted',
 683                         'uri-id', 'parent-uri-id',
 684                         'allow_cid', 'allow_gid', 'deny_cid', 'deny_gid',
 685                         'wall', 'private', 'origin', 'author-id'];
 686                 $condition = ['uri-id' => [$item['thr-parent-id'], $item['parent-uri-id']], 'uid' => $item['uid']];
 687                 $params = ['order' => ['id' => false]];
 688                 $parent = Post::selectFirst($fields, $condition, $params);
 689
 690                 if (!DBA::isResult($parent) && Post::exists(['uri-id' => [$item['thr-parent-id'], $item['parent-uri-id']], 'uid' => 0])) {
 691                         $stored = Item::storeForUserByUriId($item['thr-parent-id'], $item['uid']);
 692                         if (!$stored && ($item['thr-parent-id'] != $item['parent-uri-id'])) {
 693                                 $stored = Item::storeForUserByUriId($item['parent-uri-id'], $item['uid']);
 694                         }
 695                         if ($stored) {
 696                                 Logger::info('Stored thread parent item for user', ['uri-id' => $item['thr-parent-id'], 'uid' => $item['uid'], 'stored' => $stored]);
 697                                 $parent = Post::selectFirst($fields, $condition, $params);
 698                         }
 699                 }
 700
 701                 if (!DBA::isResult($parent)) {
 702                         Logger::notice('item parent was not found - ignoring item', ['thr-parent-id' => $item['thr-parent-id'], 'uid' => $item['uid']]);
 703                         return [];
 704                 }
 705
 706                 if ($parent['uri-id'] == $parent['parent-uri-id']) {
 707                         return $parent;
 708                 }
 709
 710                 $condition = ['uri-id' => $parent['parent-uri-id'],
 711                         'parent-uri-id' => $parent['parent-uri-id'],
 712                         'uid' => $parent['uid']];
 713                 $params = ['order' => ['id' => false]];
 714                 $toplevel_parent = Post::selectFirst($fields, $condition, $params);
 715
 716                 if (!DBA::isResult($toplevel_parent) && $item['origin']) {
 717                         $stored = Item::storeForUserByUriId($item['parent-uri-id'], $item['uid']);
 718                         Logger::info('Stored parent item for user', ['uri-id' => $item['parent-uri-id'], 'uid' => $item['uid'], 'stored' => $stored]);
 719                         $toplevel_parent = Post::selectFirst($fields, $condition, $params);
 720                 }
 721
 722                 if (!DBA::isResult($toplevel_parent)) {
 723                         Logger::notice('item top level parent was not found - ignoring item', ['parent-uri-id' => $parent['parent-uri-id'], 'uid' => $parent['uid']]);
 724                         return [];
 725                 }
 726
 727                 return $toplevel_parent;
 728         }
 729
 730         /**
 731          * Get the gravity for the given item array
 732          *
 733          * @param array $item
 734          * @return integer gravity
 735          */
 736         private static function getGravity(array $item): int
 737         {
 738                 $activity = DI::activity();
 739
 740                 if (isset($item['gravity'])) {
 741                         return intval($item['gravity']);
 742                 } elseif ($item['parent-uri-id'] === $item['uri-id']) {
 743                         return GRAVITY_PARENT;
 744                 } elseif ($activity->match($item['verb'], Activity::POST)) {
 745                         return GRAVITY_COMMENT;
 746                 } elseif ($activity->match($item['verb'], Activity::FOLLOW)) {
 747                         return GRAVITY_ACTIVITY;
 748                 } elseif ($activity->match($item['verb'], Activity::ANNOUNCE)) {
 749                         return GRAVITY_ACTIVITY;
 750                 }
 751
 752                 Logger::info('Unknown gravity for verb', ['verb' => $item['verb']]);
 753                 return GRAVITY_UNKNOWN;   // Should not happen
 754         }
 755
 756         /**
 757          * Inserts item record
 758          *
 759          * @param array $item Item array to be inserted
 760          * @param int   $notify Notification (type?)
 761          * @param bool  $post_local (???)
 762          * @return int Zero means error, otherwise primary key (id) is being returned
 763          */
 764         public static function insert(array $item, int $notify = 0, bool $post_local = true): int
 765         {
 766                 $orig_item = $item;
 767
 768                 $priority = PRIORITY_HIGH;
 769
 770                 // If it is a posting where users should get notifications, then define it as wall posting
 771                 if ($notify) {
 772                         $item['wall'] = 1;
 773                         $item['origin'] = 1;
 774                         $item['network'] = Protocol::DFRN;
 775                         $item['protocol'] = Conversation::PARCEL_DIRECT;
 776                         $item['direction'] = Conversation::PUSH;
 777
 778                         if (is_int($notify) && in_array($notify, PRIORITIES)) {
 779                                 $priority = $notify;
 780                         }
 781                 } else {
 782                         $item['network'] = trim(($item['network'] ?? '') ?: Protocol::PHANTOM);
 783                 }
 784
 785                 $uid = intval($item['uid']);
 786
 787                 $item['guid'] = self::guid($item, $notify);
 788                 $item['uri'] = substr(trim($item['uri'] ?? '') ?: self::newURI($item['guid']), 0, 255);
 789
 790                 // Store URI data
 791                 $item['uri-id'] = ItemURI::insert(['uri' => $item['uri'], 'guid' => $item['guid']]);
 792
 793                 // Backward compatibility: parent-uri used to be the direct parent uri.
 794                 // If it is provided without a thr-parent, it probably is the old behavior.
 795                 if (empty($item['thr-parent']) || empty($item['parent-uri'])) {
 796                         $item['thr-parent'] = trim($item['thr-parent'] ?? $item['parent-uri'] ?? $item['uri']);
 797                         $item['parent-uri'] = $item['thr-parent'];
 798                 }
 799
 800                 $item['thr-parent-id'] = ItemURI::getIdByURI($item['thr-parent']);
 801                 $item['parent-uri-id'] = ItemURI::getIdByURI($item['parent-uri']);
 802
 803                 // Store conversation data
 804                 $item = Conversation::insert($item);
 805
 806                 /*
 807                  * Do we already have this item?
 808                  * We have to check several networks since Friendica posts could be repeated
 809                  * via OStatus (maybe Diasporsa as well)
 810                  */
 811                 $duplicate = self::getDuplicateID($item);
 812                 if ($duplicate) {
 813                         return $duplicate;
 814                 }
 815
 816                 // Additional duplicate checks
 817                 /// @todo Check why the first duplication check returns the item number and the second a 0
 818                 if (self::isDuplicate($item)) {
 819                         return 0;
 820                 }
 821
 822                 if (!isset($item['post-type'])) {
 823                         $item['post-type'] = empty($item['title']) ? self::PT_NOTE : self::PT_ARTICLE;
 824                 }
 825
 826                 $item['wall']          = intval($item['wall'] ?? 0);
 827                 $item['extid']         = trim($item['extid'] ?? '');
 828                 $item['author-name']   = trim($item['author-name'] ?? '');
 829                 $item['author-link']   = trim($item['author-link'] ?? '');
 830                 $item['author-avatar'] = trim($item['author-avatar'] ?? '');
 831                 $item['owner-name']    = trim($item['owner-name'] ?? '');
 832                 $item['owner-link']    = trim($item['owner-link'] ?? '');
 833                 $item['owner-avatar']  = trim($item['owner-avatar'] ?? '');
 834                 $item['received']      = (isset($item['received'])  ? DateTimeFormat::utc($item['received'])  : DateTimeFormat::utcNow());
 835                 $item['created']       = (isset($item['created'])   ? DateTimeFormat::utc($item['created'])   : $item['received']);
 836                 $item['edited']        = (isset($item['edited'])    ? DateTimeFormat::utc($item['edited'])    : $item['created']);
 837                 $item['changed']       = (isset($item['changed'])   ? DateTimeFormat::utc($item['changed'])   : $item['created']);
 838                 $item['commented']     = (isset($item['commented']) ? DateTimeFormat::utc($item['commented']) : $item['created']);
 839                 $item['title']         = substr(trim($item['title'] ?? ''), 0, 255);
 840                 $item['location']      = trim($item['location'] ?? '');
 841                 $item['coord']         = trim($item['coord'] ?? '');
 842                 $item['visible']       = (isset($item['visible']) ? intval($item['visible']) : 1);
 843                 $item['deleted']       = 0;
 844                 $item['verb']          = trim($item['verb'] ?? '');
 845                 $item['object-type']   = trim($item['object-type'] ?? '');
 846                 $item['object']        = trim($item['object'] ?? '');
 847                 $item['target-type']   = trim($item['target-type'] ?? '');
 848                 $item['target']        = trim($item['target'] ?? '');
 849                 $item['plink']         = substr(trim($item['plink'] ?? ''), 0, 255);
 850                 $item['allow_cid']     = trim($item['allow_cid'] ?? '');
 851                 $item['allow_gid']     = trim($item['allow_gid'] ?? '');
 852                 $item['deny_cid']      = trim($item['deny_cid'] ?? '');
 853                 $item['deny_gid']      = trim($item['deny_gid'] ?? '');
 854                 $item['private']       = intval($item['private'] ?? self::PUBLIC);
 855                 $item['body']          = trim($item['body'] ?? '');
 856                 $item['raw-body']      = trim($item['raw-body'] ?? $item['body']);
 857                 $item['app']           = trim($item['app'] ?? '');
 858                 $item['origin']        = intval($item['origin'] ?? 0);
 859                 $item['postopts']      = trim($item['postopts'] ?? '');
 860                 $item['resource-id']   = trim($item['resource-id'] ?? '');
 861                 $item['event-id']      = intval($item['event-id'] ?? 0);
 862                 $item['inform']        = trim($item['inform'] ?? '');
 863                 $item['file']          = trim($item['file'] ?? '');
 864
 865                 // Communities aren't working with the Diaspora protoccol
 866                 if (($uid != 0) && ($item['network'] == Protocol::DIASPORA)) {
 867                         $user = User::getById($uid, ['account-type']);
 868                         if ($user['account-type'] == Contact::TYPE_COMMUNITY) {
 869                                 Logger::info('Community posts are not supported via Diaspora');
 870                                 return 0;
 871                         }
 872                 }
 873
 874                 // Items cannot be stored before they happen ...
 875                 if ($item['created'] > DateTimeFormat::utcNow()) {
 876                         $item['created'] = DateTimeFormat::utcNow();
 877                 }
 878
 879                 // We haven't invented time travel by now.
 880                 if ($item['edited'] > DateTimeFormat::utcNow()) {
 881                         $item['edited'] = DateTimeFormat::utcNow();
 882                 }
 883
 884                 $item['plink'] = ($item['plink'] ?? '') ?: DI::baseUrl() . '/display/' . urlencode($item['guid']);
 885
 886                 $item['gravity'] = self::getGravity($item);
 887
 888                 $item['language'] = self::getLanguage($item);
 889
 890                 $default = ['url' => $item['author-link'], 'name' => $item['author-name'],
 891                         'photo' => $item['author-avatar'], 'network' => $item['network']];
 892                 $item['author-id'] = ($item['author-id'] ?? 0) ?: Contact::getIdForURL($item['author-link'], 0, null, $default);
 893
 894                 $default = ['url' => $item['owner-link'], 'name' => $item['owner-name'],
 895                         'photo' => $item['owner-avatar'], 'network' => $item['network']];
 896                 $item['owner-id'] = ($item['owner-id'] ?? 0) ?: Contact::getIdForURL($item['owner-link'], 0, null, $default);
 897
 898                 $actor = ($item['gravity'] == GRAVITY_PARENT) ? $item['owner-id'] : $item['author-id'];
 899                 if (!$item['origin'] && ($item['uid'] != 0) && Contact::isSharing($actor, $item['uid'])) {
 900                         $item['post-reason'] = self::PR_FOLLOWER;
 901                 }
 902
 903                 // Ensure that there is an avatar cache
 904                 Contact::checkAvatarCache($item['author-id']);
 905                 Contact::checkAvatarCache($item['owner-id']);
 906
 907                 // The contact-id should be set before "self::insert" was called - but there seems to be issues sometimes
 908                 $item['contact-id'] = self::contactId($item);
 909
 910                 if (!empty($item['direction']) && in_array($item['direction'], [Conversation::PUSH, Conversation::RELAY]) &&
 911                         empty($item['origin']) && self::isTooOld($item)) {
 912                         Logger::info('Item is too old', ['item' => $item]);
 913                         return 0;
 914                 }
 915
 916                 if (!self::isValid($item)) {
 917                         return 0;
 918                 }
 919
 920                 if ($item['gravity'] !== GRAVITY_PARENT) {
 921                         $toplevel_parent = self::getTopLevelParent($item);
 922                         if (empty($toplevel_parent)) {
 923                                 return 0;
 924                         }
 925
 926                         // If the thread originated from this node, we check the permission against the thread starter
 927                         $condition = ['uri-id' => $toplevel_parent['uri-id'], 'wall' => true];
 928                         $localTopLevelParent = Post::selectFirst(['uid'], $condition);
 929                         if (!empty($localTopLevelParent['uid']) && !self::isAllowedByUser($item, $localTopLevelParent['uid'])) {
 930                                 return 0;
 931                         }
 932
 933                         $parent_id             = $toplevel_parent['id'];
 934                         $item['parent-uri']    = $toplevel_parent['uri'];
 935                         $item['parent-uri-id'] = $toplevel_parent['uri-id'];
 936                         $item['deleted']       = $toplevel_parent['deleted'];
 937
 938                         // Reshares have to keep their permissions to allow forums to work
 939                         if (!$item['origin'] || ($item['verb'] != Activity::ANNOUNCE)) {
 940                                 $item['allow_cid']     = $toplevel_parent['allow_cid'];
 941                                 $item['allow_gid']     = $toplevel_parent['allow_gid'];
 942                                 $item['deny_cid']      = $toplevel_parent['deny_cid'];
 943                                 $item['deny_gid']      = $toplevel_parent['deny_gid'];
 944                         }
 945
 946                         $parent_origin         = $toplevel_parent['origin'];
 947
 948                         // Don't federate received participation messages
 949                         if ($item['verb'] != Activity::FOLLOW) {
 950                                 $item['wall'] = $toplevel_parent['wall'];
 951                         } else {
 952                                 $item['wall'] = false;
 953                                 // Participations are technical messages, so they are set to "seen" automatically
 954                                 $item['unseen'] = false;
 955                         }
 956
 957                         /*
 958                          * If the parent is private, force privacy for the entire conversation
 959                          * This differs from the above settings as it subtly allows comments from
 960                          * email correspondents to be private even if the overall thread is not.
 961                          */
 962                         if ($toplevel_parent['private']) {
 963                                 $item['private'] = $toplevel_parent['private'];
 964                         }
 965
 966                         // If its a post that originated here then tag the thread as "mention"
 967                         if ($item['origin'] && $item['uid']) {
 968                                 DBA::update('post-thread-user', ['mention' => true], ['uri-id' => $item['parent-uri-id'], 'uid' => $item['uid']]);
 969                                 Logger::info('tagged thread as mention', ['parent' => $parent_id, 'parent-uri-id' => $item['parent-uri-id'], 'uid' => $item['uid']]);
 970                         }
 971
 972                         // Update the contact relations
 973                         Contact\Relation::store($toplevel_parent['author-id'], $item['author-id'], $item['created']);
 974                 } else {
 975                         $parent_id = 0;
 976                         $parent_origin = $item['origin'];
 977
 978                         if ($item['wall'] && empty($item['conversation'])) {
 979                                 $item['conversation'] = $item['parent-uri'] . '#context';
 980                         }
 981                 }
 982
 983                 $item['parent-uri-id'] = ItemURI::getIdByURI($item['parent-uri']);
 984                 $item['thr-parent-id'] = ItemURI::getIdByURI($item['thr-parent']);
 985
 986                 if (!empty($item['conversation']) && empty($item['conversation-id'])) {
 987                         $item['conversation-id'] = ItemURI::getIdByURI($item['conversation']);
 988                 }
 989
 990                 // Is this item available in the global items (with uid=0)?
 991                 if ($item['uid'] == 0) {
 992                         $item['global'] = true;
 993
 994                         // Set the global flag on all items if this was a global item entry
 995                         Post::update(['global' => true], ['uri-id' => $item['uri-id']]);
 996                 } else {
 997                         $item['global'] = Post::exists(['uid' => 0, 'uri-id' => $item['uri-id']]);
 998                 }
 999
1000                 // ACL settings
1001                 if (!empty($item['allow_cid'] . $item['allow_gid'] . $item['deny_cid'] . $item['deny_gid'])) {
1002                         $item['private'] = self::PRIVATE;
1003                 }
1004
1005                 if ($notify && $post_local) {
1006                         $item['edit'] = false;
1007                         $item['parent'] = $parent_id;
1008
1009                         // Trigger automatic reactions for addons
1010                         if (!isset($item['api_source'])) {
1011                                 $item['api_source'] = true;
1012                         }
1013
1014                         // We have to tell the hooks who we are - this really should be improved
1015                         if (!local_user()) {
1016                                 $_SESSION['authenticated'] = true;
1017                                 $_SESSION['uid'] = $uid;
1018                                 $dummy_session = true;
1019                         } else {
1020                                 $dummy_session = false;
1021                         }
1022
1023                         Hook::callAll('post_local', $item);
1024
1025                         if ($dummy_session) {
1026                                 unset($_SESSION['authenticated']);
1027                                 unset($_SESSION['uid']);
1028                         }
1029                 } elseif (!$notify) {
1030                         Hook::callAll('post_remote', $item);
1031                 }
1032
1033                 if (!empty($item['cancel'])) {
1034                         Logger::notice('post cancelled by addon.');
1035                         return 0;
1036                 }
1037
1038                 if (empty($item['vid']) && !empty($item['verb'])) {
1039                         $item['vid'] = Verb::getID($item['verb']);
1040                 }
1041
1042                 // Creates or assigns the permission set
1043                 $item['psid'] = DI::permissionSet()->selectOrCreate(
1044                         DI::permissionSetFactory()->createFromString(
1045                                 $item['uid'],
1046                                 $item['allow_cid'],
1047                                 $item['allow_gid'],
1048                                 $item['deny_cid'],
1049                                 $item['deny_gid']
1050                 ))->id;
1051
1052                 if (!empty($item['extid'])) {
1053                         $item['external-id'] = ItemURI::getIdByURI($item['extid']);
1054                 }
1055
1056                 if ($item['verb'] == Activity::ANNOUNCE) {
1057                         self::setOwnerforResharedItem($item);
1058                 }
1059
1060                 if (isset($item['attachments'])) {
1061                         foreach ($item['attachments'] as $attachment) {
1062                                 $attachment['uri-id'] = $item['uri-id'];
1063                                 Post\Media::insert($attachment);
1064                         }
1065                         unset($item['attachments']);
1066                 }
1067
1068                 Post\Media::insertFromAttachmentData($item['uri-id'], $item['body']);
1069
1070                 // Remove all media attachments from the body and store them in the post-media table
1071                 $item['raw-body'] = Post\Media::insertFromBody($item['uri-id'], $item['raw-body']);
1072                 $item['raw-body'] = self::setHashtags($item['raw-body']);
1073
1074                 if (!DBA::exists('contact', ['id' => $item['author-id'], 'network' => Protocol::DFRN])) {
1075                         Post\Media::insertFromRelevantUrl($item['uri-id'], $item['raw-body']);
1076                 }
1077
1078                 // Check for hashtags in the body and repair or add hashtag links
1079                 $item['body'] = self::setHashtags($item['body']);
1080
1081                 if (stristr($item['verb'], Activity::POKE)) {
1082                         $notify_type = Delivery::POKE;
1083                 } else {
1084                         $notify_type = Delivery::POST;
1085                 }
1086
1087                 // Filling item related side tables
1088                 if (!empty($item['attach'])) {
1089                         Post\Media::insertFromAttachment($item['uri-id'], $item['attach']);
1090                 }
1091
1092                 if (empty($item['event-id'])) {
1093                         unset($item['event-id']);
1094
1095                         $ev = Event::fromBBCode($item['body']);
1096                         if ((!empty($ev['desc']) || !empty($ev['summary'])) && !empty($ev['start'])) {
1097                                 Logger::info('Event found.');
1098                                 $ev['cid']       = $item['contact-id'];
1099                                 $ev['uid']       = $item['uid'];
1100                                 $ev['uri']       = $item['uri'];
1101                                 $ev['edited']    = $item['edited'];
1102                                 $ev['private']   = $item['private'];
1103                                 $ev['guid']      = $item['guid'];
1104                                 $ev['plink']     = $item['plink'];
1105                                 $ev['network']   = $item['network'];
1106                                 $ev['protocol']  = $item['protocol'] ?? Conversation::PARCEL_UNKNOWN;
1107                                 $ev['direction'] = $item['direction'] ?? Conversation::UNKNOWN;
1108                                 $ev['source']    = $item['source'] ?? '';
1109
1110                                 $event = DBA::selectFirst('event', ['id'], ['uri' => $item['uri'], 'uid' => $item['uid']]);
1111                                 if (DBA::isResult($event)) {
1112                                         $ev['id'] = $event['id'];
1113                                 }
1114
1115                                 $event_id = Event::store($ev);
1116                                 $item = Event::getItemArrayForImportedId($event_id, $item);
1117
1118                                 Logger::info('Event was stored', ['id' => $event_id]);
1119                         }
1120                 }
1121
1122                 if (empty($item['causer-id'])) {
1123                         unset($item['causer-id']);
1124                 }
1125
1126                 if (in_array($item['network'], [Protocol::ACTIVITYPUB, Protocol::DFRN])) {
1127                         $content_warning = BBCode::getAbstract($item['body'], Protocol::ACTIVITYPUB);
1128                         if (!empty($content_warning) && empty($item['content-warning'])) {
1129                                 $item['content-warning'] = BBCode::toPlaintext($content_warning);
1130                         }
1131                 }
1132
1133                 Post::insert($item['uri-id'], $item);
1134
1135                 if ($item['gravity'] == GRAVITY_PARENT) {
1136                         Post\Thread::insert($item['uri-id'], $item);
1137                 }
1138
1139                 if (!in_array($item['verb'], self::ACTIVITIES)) {
1140                         Post\Content::insert($item['uri-id'], $item);
1141                 }
1142
1143                 // Create Diaspora signature
1144                 if ($item['origin'] && empty($item['diaspora_signed_text']) && ($item['gravity'] != GRAVITY_PARENT)) {
1145                         $signed = Diaspora::createCommentSignature($item);
1146                         if (!empty($signed)) {
1147                                 $item['diaspora_signed_text'] = json_encode($signed);
1148                         }
1149                 }
1150
1151                 if (!empty($item['diaspora_signed_text'])) {
1152                         DBA::replace('diaspora-interaction', ['uri-id' => $item['uri-id'], 'interaction' => $item['diaspora_signed_text']]);
1153                 }
1154
1155                 // Attached file links
1156                 if (!empty($item['file'])) {
1157                         Post\Category::storeTextByURIId($item['uri-id'], $item['uid'], $item['file']);
1158                 }
1159
1160                 // Delivery relevant data
1161                 $delivery_data = Post\DeliveryData::extractFields($item);
1162
1163                 if (!empty($item['origin']) || !empty($item['wall']) || !empty($delivery_data['postopts']) || !empty($delivery_data['inform'])) {
1164                         Post\DeliveryData::insert($item['uri-id'], $delivery_data);
1165                 }
1166
1167                 // Store tags from the body if this hadn't been handled previously in the protocol classes
1168                 if (!Tag::existsForPost($item['uri-id'])) {
1169                         Tag::storeFromBody($item['uri-id'], $item['body']);
1170                 }
1171
1172                 $condition = ['uri-id' => $item['uri-id'], 'uid' => $item['uid']];
1173                 if (Post::exists($condition)) {
1174                         Logger::notice('Item is already inserted - aborting', $condition);
1175                         return 0;
1176                 }
1177
1178                 $post_user_id = Post\User::insert($item['uri-id'], $item['uid'], $item);
1179                 if (!$post_user_id) {
1180                         Logger::notice('Post-User is already inserted - aborting', ['uid' => $item['uid'], 'uri-id' => $item['uri-id']]);
1181                         return 0;
1182                 }
1183
1184                 if ($item['gravity'] == GRAVITY_PARENT) {
1185                         $item['post-user-id'] = $post_user_id;
1186                         Post\ThreadUser::insert($item['uri-id'], $item['uid'], $item);
1187                 }
1188
1189                 Logger::notice('created item', ['post-id' => $post_user_id, 'uid' => $item['uid'], 'network' => $item['network'], 'uri-id' => $item['uri-id'], 'guid' => $item['guid']]);
1190
1191                 $posted_item = Post::selectFirst(self::ITEM_FIELDLIST, ['post-user-id' => $post_user_id]);
1192                 if (!DBA::isResult($posted_item)) {
1193                         // On failure store the data into a spool file so that the "SpoolPost" worker can try again later.
1194                         Logger::warning('Could not store item. it will be spooled', ['id' => $post_user_id]);
1195                         self::spool($orig_item);
1196                         return 0;
1197                 }
1198
1199                 // update the commented timestamp on the parent
1200                 if (DI::config()->get('system', 'like_no_comment')) {
1201                         // Update when it is a comment
1202                         $update_commented = in_array($posted_item['gravity'], [GRAVITY_PARENT, GRAVITY_COMMENT]);
1203                 } else {
1204                         // Update when it isn't a follow or tag verb
1205                         $update_commented = !in_array($posted_item['verb'], [Activity::FOLLOW, Activity::TAG]);
1206                 }
1207
1208                 if ($update_commented) {
1209                         $fields = ['commented' => DateTimeFormat::utcNow(), 'changed' => DateTimeFormat::utcNow()];
1210                 } else {
1211                         $fields = ['changed' => DateTimeFormat::utcNow()];
1212                 }
1213
1214                 Post::update($fields, ['uri-id' => $posted_item['parent-uri-id'], 'uid' => $posted_item['uid']]);
1215
1216                 // In that function we check if this is a forum post. Additionally we delete the item under certain circumstances
1217                 if (self::tagDeliver($posted_item['uid'], $post_user_id)) {
1218                         // Get the user information for the logging
1219                         $user = User::getById($uid);
1220
1221                         Logger::notice('Item had been deleted', ['id' => $post_user_id, 'user' => $uid, 'account-type' => $user['account-type']]);
1222                         return 0;
1223                 }
1224
1225                 if ($notify) {
1226                         if (!\Friendica\Content\Feature::isEnabled($posted_item['uid'], 'explicit_mentions') && ($posted_item['gravity'] == GRAVITY_COMMENT)) {
1227                                 Tag::createImplicitMentions($posted_item['uri-id'], $posted_item['thr-parent-id']);
1228                         }
1229                         Hook::callAll('post_local_end', $posted_item);
1230                 } else {
1231                         Hook::callAll('post_remote_end', $posted_item);
1232                 }
1233
1234                 if ($posted_item['gravity'] === GRAVITY_PARENT) {
1235                         self::addShadow($post_user_id);
1236                 } else {
1237                         self::addShadowPost($post_user_id);
1238                 }
1239
1240                 self::updateContact($posted_item);
1241
1242                 Post\UserNotification::setNotification($posted_item['uri-id'], $posted_item['uid']);
1243
1244                 // Distribute items to users who subscribed to their tags
1245                 self::distributeByTags($posted_item);
1246
1247                 // Automatically reshare the item if the "remote_self" option is selected
1248                 self::autoReshare($posted_item);
1249
1250                 $transmit = $notify || ($posted_item['visible'] && ($parent_origin || $posted_item['origin']));
1251
1252                 if ($transmit) {
1253                         // Don't relay participation messages
1254                         if (($posted_item['verb'] == Activity::FOLLOW) &&
1255                                 (!$posted_item['origin'] || ($posted_item['author-id'] != Contact::getPublicIdByUserId($uid)))) {
1256                                 Logger::info('Participation messages will not be relayed', ['item' => $posted_item['id'], 'uri' => $posted_item['uri'], 'verb' => $posted_item['verb']]);
1257                                 $transmit = false;
1258                         }
1259                 }
1260
1261                 if ($transmit) {
1262                         Worker::add(['priority' => $priority, 'dont_fork' => true], 'Notifier', $notify_type, (int)$posted_item['uri-id'], (int)$posted_item['uid']);
1263                 }
1264
1265                 // Fill the cache with the rendered content.
1266                 if (in_array($posted_item['gravity'], [GRAVITY_PARENT, GRAVITY_COMMENT]) && ($posted_item['uid'] == 0)) {
1267                         self::updateDisplayCache($posted_item['uri-id']);
1268                 }
1269
1270                 if ($posted_item['origin'] && ($posted_item['uid'] != 0) && in_array($posted_item['gravity'], [GRAVITY_PARENT, GRAVITY_COMMENT])) {
1271                         DI::cache()->delete(ActivityPub\Transmitter::CACHEKEY_OUTBOX . $posted_item['uid']);
1272                 }
1273
1274                 return $post_user_id;
1275         }
1276
1277         /**
1278          * Update the display cache
1279          *
1280          * @param integer $uri_id
1281          * @return void
1282          */
1283         public static function updateDisplayCache(int $uri_id)
1284         {
1285                 $item = Post::selectFirst(self::DISPLAY_FIELDLIST, ['uri-id' => $uri_id]);
1286                 self::prepareBody($item, false, false, true);
1287         }
1288
1289         /**
1290          * Change the owner of a parent item if it had been shared by a forum
1291          *
1292          * (public) forum posts in the new format consist of the regular post by the author
1293          * followed by an announce message sent from the forum account.
1294          * Changing the owner helps in grouping forum posts.
1295          *
1296          * @param array $item
1297          * @return void
1298          */
1299         private static function setOwnerforResharedItem(array $item)
1300         {
1301                 $parent = Post::selectFirst(['id', 'causer-id', 'owner-id', 'author-id', 'author-link', 'origin', 'post-reason'],
1302                         ['uri-id' => $item['thr-parent-id'], 'uid' => $item['uid']]);
1303                 if (!DBA::isResult($parent)) {
1304                         Logger::error('Parent not found', ['uri-id' => $item['thr-parent-id'], 'uid' => $item['uid']]);
1305                         return;
1306                 }
1307
1308                 $author = Contact::selectFirst(['url', 'contact-type', 'network'], ['id' => $item['author-id']]);
1309                 if (!DBA::isResult($author)) {
1310                         Logger::error('Author not found', ['id' => $item['author-id']]);
1311                         return;
1312                 }
1313
1314                 $self_contact = Contact::selectFirst(['id'], ['uid' => $item['uid'], 'self' => true]);
1315                 $self = !empty($self_contact) ? $self_contact['id'] : 0;
1316
1317                 $cid = Contact::getIdForURL($author['url'], $item['uid']);
1318                 if (empty($cid) || (!Contact::isSharing($cid, $item['uid']) && ($cid != $self))) {
1319                         Logger::info('The resharer is not a following contact: quit', ['resharer' => $author['url'], 'uid' => $item['uid'], 'cid' => $cid]);
1320                         return;
1321                 }
1322
1323                 if ($author['contact-type'] != Contact::TYPE_COMMUNITY) {
1324                         if ($parent['post-reason'] == self::PR_ANNOUNCEMENT) {
1325                                 Logger::info('The parent is already marked as announced: quit', ['causer' => $parent['causer-id'], 'owner' => $parent['owner-id'], 'author' => $parent['author-id'], 'uid' => $item['uid']]);
1326                                 return;
1327                         }
1328
1329                         if (Contact::isSharing($parent['owner-id'], $item['uid'])) {
1330                                 Logger::info('The resharer is no forum: quit', ['resharer' => $item['author-id'], 'owner' => $parent['owner-id'], 'author' => $parent['author-id'], 'uid' => $item['uid']]);
1331                                 return;
1332                         }
1333                 }
1334
1335                 self::update(['post-reason' => self::PR_ANNOUNCEMENT, 'causer-id' => $item['author-id']], ['id' => $parent['id']]);
1336                 Logger::info('Set announcement post-reason', ['uri-id' => $item['uri-id'], 'thr-parent-id' => $item['thr-parent-id'], 'uid' => $item['uid']]);
1337         }
1338
1339         /**
1340          * Distribute the given item to users who subscribed to their tags
1341          *
1342          * @param array $item     Processed item
1343          */
1344         private static function distributeByTags(array $item)
1345         {
1346                 if (($item['uid'] != 0) || ($item['gravity'] != GRAVITY_PARENT) || !in_array($item['network'], Protocol::FEDERATED)) {
1347                         return;
1348                 }
1349
1350                 $uids = Tag::getUIDListByURIId($item['uri-id']);
1351                 foreach ($uids as $uid) {
1352                         if (Contact::isSharing($item['author-id'], $uid)) {
1353                                 $fields = [];
1354                         } else {
1355                                 $fields = ['post-reason' => self::PR_TAG];
1356                         }
1357
1358                         $stored = self::storeForUserByUriId($item['uri-id'], $uid, $fields);
1359                         Logger::info('Stored item for users', ['uri-id' => $item['uri-id'], 'uid' => $uid, 'fields' => $fields, 'stored' => $stored]);
1360                 }
1361         }
1362
1363         /**
1364          * Distributes public items to the receivers
1365          *
1366          * @param integer $itemid      Item ID that should be added
1367          * @param string  $signed_text Original text (for Diaspora signatures), JSON encoded.
1368          * @throws \Exception
1369          */
1370         public static function distribute(int $itemid, string $signed_text = '')
1371         {
1372                 $condition = ["`id` IN (SELECT `parent` FROM `post-user-view` WHERE `id` = ?)", $itemid];
1373                 $parent = Post::selectFirst(['owner-id'], $condition);
1374                 if (!DBA::isResult($parent)) {
1375                         Logger::warning('Item not found', ['condition' => $condition]);
1376                         return;
1377                 }
1378
1379                 // Only distribute public items from native networks
1380                 $condition = ['id' => $itemid, 'uid' => 0,
1381                         'network' => array_merge(Protocol::FEDERATED ,['']),
1382                         'visible' => true, 'deleted' => false, 'private' => [self::PUBLIC, self::UNLISTED]];
1383                 $item = Post::selectFirst(self::ITEM_FIELDLIST, $condition);
1384                 if (!DBA::isResult($item)) {
1385                         Logger::warning('Item not found', ['condition' => $condition]);
1386                         return;
1387                 }
1388
1389                 $origin = $item['origin'];
1390
1391                 $users = [];
1392
1393                 /// @todo add a field "pcid" in the contact table that referrs to the public contact id.
1394                 $owner = DBA::selectFirst('contact', ['url', 'nurl', 'alias'], ['id' => $parent['owner-id']]);
1395                 if (!DBA::isResult($owner)) {
1396                         return;
1397                 }
1398
1399                 $condition = ['nurl' => $owner['nurl'], 'rel' => [Contact::SHARING, Contact::FRIEND]];
1400                 $contacts = DBA::select('contact', ['uid'], $condition);
1401                 while ($contact = DBA::fetch($contacts)) {
1402                         if ($contact['uid'] == 0) {
1403                                 continue;
1404                         }
1405
1406                         $users[$contact['uid']] = $contact['uid'];
1407                 }
1408                 DBA::close($contacts);
1409
1410                 $condition = ['alias' => $owner['url'], 'rel' => [Contact::SHARING, Contact::FRIEND]];
1411                 $contacts = DBA::select('contact', ['uid'], $condition);
1412                 while ($contact = DBA::fetch($contacts)) {
1413                         if ($contact['uid'] == 0) {
1414                                 continue;
1415                         }
1416
1417                         $users[$contact['uid']] = $contact['uid'];
1418                 }
1419                 DBA::close($contacts);
1420
1421                 if (!empty($owner['alias'])) {
1422                         $condition = ['nurl' => Strings::normaliseLink($owner['alias']), 'rel' => [Contact::SHARING, Contact::FRIEND]];
1423                         $contacts = DBA::select('contact', ['uid'], $condition);
1424                         while ($contact = DBA::fetch($contacts)) {
1425                                 if ($contact['uid'] == 0) {
1426                                         continue;
1427                                 }
1428
1429                                 $users[$contact['uid']] = $contact['uid'];
1430                         }
1431                         DBA::close($contacts);
1432                 }
1433
1434                 $origin_uid = 0;
1435
1436                 if ($item['uri-id'] != $item['parent-uri-id']) {
1437                         $parents = Post::select(['uid', 'origin'], ["`uri-id` = ? AND `uid` != 0", $item['parent-uri-id']]);
1438                         while ($parent = Post::fetch($parents)) {
1439                                 $users[$parent['uid']] = $parent['uid'];
1440                                 if ($parent['origin'] && !$origin) {
1441                                         $origin_uid = $parent['uid'];
1442                                 }
1443                         }
1444                         DBA::close($parents);
1445                 }
1446
1447                 foreach ($users as $uid) {
1448                         if ($origin_uid == $uid) {
1449                                 $item['diaspora_signed_text'] = $signed_text;
1450                         }
1451                         self::storeForUser($item, $uid);
1452                 }
1453         }
1454
1455         /**
1456          * Store a public item defined by their URI-ID for the given users
1457          *
1458          * @param integer $uri_id     URI-ID of the given item
1459          * @param integer $uid        The user that will receive the item entry
1460          * @param array   $fields     Additional fields to be stored
1461          * @param integer $source_uid User id of the source post
1462          * @return integer stored item id
1463          */
1464         public static function storeForUserByUriId(int $uri_id, int $uid, array $fields = [], int $source_uid = 0): int
1465         {
1466                 if ($uid == $source_uid) {
1467                         Logger::warning('target UID must not be be equal to the source UID', ['uri-id' => $uri_id, 'uid' => $uid]);
1468                         return 0;
1469                 }
1470
1471                 $item = Post::selectFirst(self::ITEM_FIELDLIST, ['uri-id' => $uri_id, 'uid' => $source_uid]);
1472                 if (!DBA::isResult($item)) {
1473                         Logger::warning('Item could not be fetched', ['uri-id' => $uri_id, 'uid' => $source_uid]);
1474                         return 0;
1475                 }
1476
1477                 if (($source_uid == 0) && (($item['private'] == self::PRIVATE) || !in_array($item['network'], Protocol::FEDERATED))) {
1478                         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']]);
1479                         return 0;
1480                 }
1481
1482                 $item['post-reason'] = self::PR_STORED;
1483
1484                 $item = array_merge($item, $fields);
1485
1486                 $is_reshare = ($item['gravity'] == GRAVITY_ACTIVITY) && ($item['verb'] == Activity::ANNOUNCE);
1487
1488                 if ((($item['gravity'] == GRAVITY_PARENT) || $is_reshare) &&
1489                         DI::pConfig()->get($uid, 'system', 'accept_only_sharer') == self::COMPLETION_NONE &&
1490                         !Contact::isSharingByURL($item['author-link'], $uid) &&
1491                         !Contact::isSharingByURL($item['owner-link'], $uid)) {
1492                         Logger::info('Contact is not a follower, thread will not be stored', ['author' => $item['author-link'], 'uid' => $uid]);
1493                         return 0;
1494                 }
1495
1496                 if (($uri_id != $item['thr-parent-id']) && (($item['gravity'] == GRAVITY_COMMENT) || $is_reshare) && !Post::exists(['uri-id' => $item['thr-parent-id'], 'uid' => $uid])) {
1497                         // Fetch the origin user for the post
1498                         $origin_uid = self::GetOriginUidForUriId($item['thr-parent-id'], $uid);
1499                         if (is_null($origin_uid)) {
1500                                 Logger::info('Origin item was not found', ['uid' => $uid, 'uri-id' => $item['thr-parent-id']]);
1501                                 return 0;
1502                         }
1503
1504                         $causer = $item['causer-id'] ?: $item['author-id'];
1505                         $result = self::storeForUserByUriId($item['thr-parent-id'], $uid, ['causer-id' => $causer, 'post-reason' => self::PR_FETCHED], $origin_uid);
1506                         Logger::info('Fetched thread parent', ['uri-id' => $item['thr-parent-id'], 'uid' => $uid, 'causer' => $causer, 'result' => $result]);
1507                 }
1508
1509                 $stored = self::storeForUser($item, $uid);
1510                 Logger::info('Item stored for user', ['uri-id' => $item['uri-id'], 'uid' => $uid, 'source-uid' => $source_uid, 'stored' => $stored]);
1511                 return $stored;
1512         }
1513
1514         /**
1515          * Returns the origin uid of a post if the given user is allowed to see it.
1516          *
1517          * @param int $uriid
1518          * @param int $uid
1519          * @return int
1520          */
1521         private static function GetOriginUidForUriId(int $uriid, int $uid)
1522         {
1523                 if (Post::exists(['uri-id' => $uriid, 'uid' => $uid])) {
1524                         return $uid;
1525                 }
1526
1527                 $post = Post::selectFirst(['uid', 'allow_cid', 'allow_gid', 'deny_cid', 'deny_gid', 'private'], ['uri-id' => $uriid, 'origin' => true]);
1528                 if (!empty($post)) {
1529                         if (in_array($post['private'], [Item::PUBLIC, Item::UNLISTED])) {
1530                                 return $post['uid'];
1531                         }
1532
1533                         $pcid = Contact::getPublicIdByUserId($uid);
1534                         if (empty($pcid)) {
1535                                 return null;
1536                         }
1537
1538                         foreach (Item::enumeratePermissions($post, true) as $receiver) {
1539                                 if ($receiver == $pcid) {
1540                                         return $post['uid'];
1541                                 }
1542                         }
1543
1544                         return null;
1545                 }
1546
1547                 if (Post::exists(['uri-id' => $uriid, 'uid' => 0])) {
1548                         return 0;
1549                 }
1550
1551                 // When the post belongs to a a forum then all forum users are allowed to access it
1552                 foreach (Tag::getByURIId($uriid, [Tag::MENTION, Tag::EXCLUSIVE_MENTION]) as $tag) {
1553                         if (DBA::exists('contact', ['uid' => $uid, 'nurl' => Strings::normaliseLink($tag['url']), 'contact-type' => Contact::TYPE_COMMUNITY])) {
1554                                 $target_uid = User::getIdForURL($tag['url']);
1555                                 if (!empty($target_uid)) {
1556                                         return $target_uid;
1557                                 }
1558                         }
1559                 }
1560
1561                 return null;
1562         }
1563
1564         /**
1565          * Store a public item array for the given users
1566          *
1567          * @param array   $item   The item entry that will be stored
1568          * @param integer $uid    The user that will receive the item entry
1569          * @return integer stored item id
1570          * @throws \Exception
1571          */
1572         private static function storeForUser(array $item, int $uid): int
1573         {
1574                 if (Post::exists(['uri-id' => $item['uri-id'], 'uid' => $uid])) {
1575                         if (!empty($item['event-id'])) {
1576                                 $post = Post::selectFirst(['event-id'], ['uri-id' => $item['uri-id'], 'uid' => $uid]);
1577                                 if (!empty($post['event-id'])) {
1578                                         $event = DBA::selectFirst('event', ['edited', 'start', 'finish', 'summary', 'desc', 'location', 'nofinish', 'adjust'], ['id' => $item['event-id']]);
1579                                         if (!empty($event)) {
1580                                                 // We aren't using "Event::store" here, since we don't want to trigger any further action
1581                                                 $ret = DBA::update('event', $event, ['id' => $post['event-id']]);
1582                                                 Logger::info('Event updated', ['uid' => $uid, 'source-event' => $item['event-id'], 'target-event' => $post['event-id'], 'ret' => $ret]);
1583                                         }
1584                                 }
1585                         }
1586                         Logger::info('Item already exists', ['uri-id' => $item['uri-id'], 'uid' => $uid]);
1587                         return 0;
1588                 }
1589
1590                 // Data from the "post-user" table
1591                 unset($item['id']);
1592                 unset($item['mention']);
1593                 unset($item['starred']);
1594                 unset($item['unseen']);
1595                 unset($item['psid']);
1596                 unset($item['pinned']);
1597                 unset($item['ignored']);
1598                 unset($item['pubmail']);
1599                 unset($item['event-id']);
1600                 unset($item['hidden']);
1601                 unset($item['notification-type']);
1602                 unset($item['post-reason']);
1603
1604                 // Data from the "post-delivery-data" table
1605                 unset($item['postopts']);
1606                 unset($item['inform']);
1607
1608                 $item['uid'] = $uid;
1609                 $item['origin'] = 0;
1610                 $item['wall'] = 0;
1611
1612                 if ($item['gravity'] == GRAVITY_PARENT) {
1613                         $contact = Contact::getByURLForUser($item['owner-link'], $uid, false, ['id']);
1614                 } else {
1615                         $contact = Contact::getByURLForUser($item['author-link'], $uid, false, ['id']);
1616                 }
1617
1618                 if (!empty($contact['id'])) {
1619                         $item['contact-id'] = $contact['id'];
1620                 } else {
1621                         // Shouldn't happen at all
1622                         Logger::warning('contact-id could not be fetched', ['uid' => $uid, 'item' => $item]);
1623                         $self = DBA::selectFirst('contact', ['id'], ['self' => true, 'uid' => $uid]);
1624                         if (!DBA::isResult($self)) {
1625                                 // Shouldn't happen even less
1626                                 Logger::warning('self contact could not be fetched', ['uid' => $uid, 'item' => $item]);
1627                                 return 0;
1628                         }
1629                         $item['contact-id'] = $self['id'];
1630                 }
1631
1632                 $notify = false;
1633                 if ($item['gravity'] == GRAVITY_PARENT) {
1634                         $contact = DBA::selectFirst('contact', [], ['id' => $item['contact-id'], 'self' => false]);
1635                         if (DBA::isResult($contact)) {
1636                                 $notify = self::isRemoteSelf($contact, $item);
1637                         }
1638                 }
1639
1640                 $distributed = self::insert($item, $notify);
1641
1642                 if (!$distributed) {
1643                         Logger::info("Distributed item wasn't stored", ['uri-id' => $item['uri-id'], 'user' => $uid]);
1644                 } else {
1645                         Logger::info('Distributed item was stored', ['uri-id' => $item['uri-id'], 'user' => $uid, 'stored' => $distributed]);
1646                 }
1647                 return $distributed;
1648         }
1649
1650         /**
1651          * Add a shadow entry for a given item id that is a thread starter
1652          *
1653          * We store every public item entry additionally with the user id "0".
1654          * This is used for the community page and for the search.
1655          * It is planned that in the future we will store public item entries only once.
1656          *
1657          * @param integer $itemid Item ID that should be added
1658          * @throws \Exception
1659          */
1660         private static function addShadow(int $itemid)
1661         {
1662                 $fields = ['uid', 'private', 'visible', 'deleted', 'network', 'uri-id'];
1663                 $condition = ['id' => $itemid, 'gravity' => GRAVITY_PARENT];
1664                 $item = Post::selectFirst($fields, $condition);
1665
1666                 if (!DBA::isResult($item)) {
1667                         return;
1668                 }
1669
1670                 // is it already a copy?
1671                 if (($itemid == 0) || ($item['uid'] == 0)) {
1672                         return;
1673                 }
1674
1675                 // Is it a visible public post?
1676                 if (!$item["visible"] || $item["deleted"]  || ($item["private"] == self::PRIVATE)) {
1677                         return;
1678                 }
1679
1680                 // is it an entry from a connector? Only add an entry for natively connected networks
1681                 if (!in_array($item["network"], array_merge(Protocol::FEDERATED ,['']))) {
1682                         return;
1683                 }
1684
1685                 if (Post::exists(['uri-id' => $item['uri-id'], 'uid' => 0])) {
1686                         return;
1687                 }
1688
1689                 $item = Post::selectFirst(self::ITEM_FIELDLIST, ['id' => $itemid]);
1690
1691                 if (DBA::isResult($item)) {
1692                         // Preparing public shadow (removing user specific data)
1693                         $item['uid'] = 0;
1694                         unset($item['id']);
1695                         unset($item['parent']);
1696                         unset($item['wall']);
1697                         unset($item['mention']);
1698                         unset($item['origin']);
1699                         unset($item['starred']);
1700                         unset($item['postopts']);
1701                         unset($item['inform']);
1702                         unset($item['post-reason']);
1703                         if ($item['uri-id'] == $item['parent-uri-id']) {
1704                                 $item['contact-id'] = $item['owner-id'];
1705                         } else {
1706                                 $item['contact-id'] = $item['author-id'];
1707                         }
1708
1709                         $public_shadow = self::insert($item);
1710
1711                         Logger::info('Stored public shadow', ['thread' => $itemid, 'id' => $public_shadow]);
1712                 }
1713         }
1714
1715         /**
1716          * Add a shadow entry for a given item id that is a comment
1717          *
1718          * This function does the same like the function above - but for comments
1719          *
1720          * @param integer $itemid Item ID that should be added
1721          * @throws \Exception
1722          */
1723         private static function addShadowPost(int $itemid)
1724         {
1725                 $item = Post::selectFirst(self::ITEM_FIELDLIST, ['id' => $itemid]);
1726                 if (!DBA::isResult($item)) {
1727                         return;
1728                 }
1729
1730                 // Is it a toplevel post?
1731                 if ($item['gravity'] == GRAVITY_PARENT) {
1732                         self::addShadow($itemid);
1733                         return;
1734                 }
1735
1736                 // Is this a shadow entry?
1737                 if ($item['uid'] == 0) {
1738                         return;
1739                 }
1740
1741                 // Is there a shadow parent?
1742                 if (!Post::exists(['uri-id' => $item['parent-uri-id'], 'uid' => 0])) {
1743                         return;
1744                 }
1745
1746                 // Is there already a shadow entry?
1747                 if (Post::exists(['uri-id' => $item['uri-id'], 'uid' => 0])) {
1748                         return;
1749                 }
1750
1751                 // Save "origin" and "parent" state
1752                 $origin = $item['origin'];
1753                 $parent = $item['parent'];
1754
1755                 // Preparing public shadow (removing user specific data)
1756                 $item['uid'] = 0;
1757                 unset($item['id']);
1758                 unset($item['parent']);
1759                 unset($item['wall']);
1760                 unset($item['mention']);
1761                 unset($item['origin']);
1762                 unset($item['starred']);
1763                 unset($item['postopts']);
1764                 unset($item['inform']);
1765                 unset($item['post-reason']);
1766                 $item['contact-id'] = Contact::getIdForURL($item['author-link']);
1767
1768                 $public_shadow = self::insert($item);
1769
1770                 Logger::info('Stored public shadow', ['uri-id' => $item['uri-id'], 'id' => $public_shadow]);
1771
1772                 // If this was a comment to a Diaspora post we don't get our comment back.
1773                 // This means that we have to distribute the comment by ourselves.
1774                 if ($origin && Post::exists(['id' => $parent, 'network' => Protocol::DIASPORA])) {
1775                         self::distribute($public_shadow);
1776                 }
1777         }
1778
1779         /**
1780          * Adds a language specification in a "language" element of given $arr.
1781          * Expects "body" element to exist in $arr.
1782          *
1783          * @param array $item
1784          * @return string detected language
1785          * @throws \Text_LanguageDetect_Exception
1786          */
1787         private static function getLanguage(array $item): string
1788         {
1789                 if (!empty($item['language'])) {
1790                         return $item['language'];
1791                 }
1792
1793                 if (!in_array($item['gravity'], [GRAVITY_PARENT, GRAVITY_COMMENT]) || empty($item['body'])) {
1794                         return '';
1795                 }
1796
1797                 // Convert attachments to links
1798                 $naked_body = BBCode::removeAttachment($item['body']);
1799                 if (empty($naked_body)) {
1800                         return '';
1801                 }
1802
1803                 // Remove links and pictures
1804                 $naked_body = BBCode::removeLinks($naked_body);
1805
1806                 // Convert the title and the body to plain text
1807                 $naked_body = trim($item['title'] . "\n" . BBCode::toPlaintext($naked_body));
1808
1809                 // Remove possibly remaining links
1810                 $naked_body = preg_replace(Strings::autoLinkRegEx(), '', $naked_body);
1811
1812                 if (empty($naked_body)) {
1813                         return '';
1814                 }
1815
1816                 $availableLanguages = DI::l10n()->getAvailableLanguages();
1817                 // See https://github.com/friendica/friendica/issues/10511
1818                 // Persian is manually added to language detection until a persian translation is provided for the interface, at
1819                 // which point it will be automatically available through `getAvailableLanguages()` and this should be removed.
1820                 $availableLanguages['fa'] = 'fa';
1821
1822                 $ld = new Language(array_keys($availableLanguages));
1823                 $languages = $ld->detect($naked_body)->limit(0, 3)->close();
1824                 if (is_array($languages)) {
1825                         return json_encode($languages);
1826                 }
1827
1828                 return '';
1829         }
1830
1831         public static function getLanguageMessage(array $item): string
1832         {
1833                 $iso639 = new \Matriphe\ISO639\ISO639;
1834
1835                 $used_languages = '';
1836                 foreach (json_decode($item['language'], true) as $language => $reliability) {
1837                         $used_languages .= $iso639->languageByCode1($language) . ' (' . $language . "): " . number_format($reliability, 5) . '\n';
1838                 }
1839                 $used_languages = DI::l10n()->t('Detected languages in this post:\n%s', $used_languages);
1840                 return $used_languages;
1841         }
1842
1843         /**
1844          * Creates an unique guid out of a given uri.
1845          * This function is used for messages outside the fediverse (Connector posts, feeds, Mails, ...)
1846          * Posts that are created on this system are using System::createUUID.
1847          * Received ActivityPub posts are using Processor::getGUIDByURL.
1848          *
1849          * @param string      $uri uri of an item entry
1850          * @param string|null $host hostname for the GUID prefix
1851          * @return string Unique guid
1852          */
1853         public static function guidFromUri(string $uri, string $host = null): string
1854         {
1855                 // Our regular guid routine is using this kind of prefix as well
1856                 // We have to avoid that different routines could accidentally create the same value
1857                 $parsed = parse_url($uri);
1858
1859                 // Remove the scheme to make sure that "https" and "http" doesn't make a difference
1860                 unset($parsed['scheme']);
1861
1862                 // Glue it together to be able to make a hash from it
1863                 $host_id = implode('/', $parsed);
1864
1865                 // Use a mixture of several hashes to provide some GUID like experience
1866                 return hash('crc32', $host) . '-'. hash('joaat', $host_id) . '-'. hash('fnv164', $host_id);
1867         }
1868
1869         /**
1870          * generate an unique URI
1871          *
1872          * @param string $guid An existing GUID (Otherwise it will be generated)
1873          *
1874          * @return string
1875          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1876          */
1877         public static function newURI(string $guid = ''): string
1878         {
1879                 if ($guid == '') {
1880                         $guid = System::createUUID();
1881                 }
1882
1883                 return DI::baseUrl()->get() . '/objects/' . $guid;
1884         }
1885
1886         /**
1887          * Set "success_update" and "last-item" to the date of the last time we heard from this contact
1888          *
1889          * This can be used to filter for inactive contacts.
1890          * Only do this for public postings to avoid privacy problems, since poco data is public.
1891          * Don't set this value if it isn't from the owner (could be an author that we don't know)
1892          *
1893          * @param array $arr Contains the just posted item record
1894          * @throws \Exception
1895          */
1896         private static function updateContact(array $arr)
1897         {
1898                 // Unarchive the author
1899                 $contact = DBA::selectFirst('contact', [], ['id' => $arr["author-id"]]);
1900                 if (DBA::isResult($contact)) {
1901                         Contact::unmarkForArchival($contact);
1902                 }
1903
1904                 // Unarchive the contact if it's not our own contact
1905                 $contact = DBA::selectFirst('contact', [], ['id' => $arr["contact-id"], 'self' => false]);
1906                 if (DBA::isResult($contact)) {
1907                         Contact::unmarkForArchival($contact);
1908                 }
1909
1910                 /// @todo On private posts we could obfuscate the date
1911                 $update = ($arr['private'] != self::PRIVATE) || in_array($arr['network'], Protocol::FEDERATED);
1912
1913                 // Is it a forum? Then we don't care about the rules from above
1914                 if (!$update && in_array($arr["network"], [Protocol::ACTIVITYPUB, Protocol::DFRN]) && ($arr["parent-uri-id"] === $arr["uri-id"])) {
1915                         if (DBA::exists('contact', ['id' => $arr['contact-id'], 'forum' => true])) {
1916                                 $update = true;
1917                         }
1918                 }
1919
1920                 if ($update) {
1921                         // The "self" contact id is used (for example in the connectors) when the contact is unknown
1922                         // So we have to ensure to only update the last item when it had been our own post,
1923                         // or it had been done by a "regular" contact.
1924                         if (!empty($arr['wall'])) {
1925                                 $condition = ['id' => $arr['contact-id']];
1926                         } else {
1927                                 $condition = ['id' => $arr['contact-id'], 'self' => false];
1928                         }
1929                         Contact::update(['failed' => false, 'success_update' => $arr['received'], 'last-item' => $arr['received']], $condition);
1930                 }
1931                 // Now do the same for the system wide contacts with uid=0
1932                 if ($arr['private'] != self::PRIVATE) {
1933                         Contact::update(['failed' => false, 'success_update' => $arr['received'], 'last-item' => $arr['received']],
1934                                 ['id' => $arr['owner-id']]);
1935
1936                         if ($arr['owner-id'] != $arr['author-id']) {
1937                                 Contact::update(['failed' => false, 'success_update' => $arr['received'], 'last-item' => $arr['received']],
1938                                         ['id' => $arr['author-id']]);
1939                         }
1940                 }
1941         }
1942
1943         public static function setHashtags(string $body): string
1944         {
1945                 $body = BBCode::performWithEscapedTags($body, ['noparse', 'pre', 'code', 'img'], function ($body) {
1946                         $tags = BBCode::getTags($body);
1947
1948                         // No hashtags?
1949                         if (!count($tags)) {
1950                                 return $body;
1951                         }
1952
1953                         // This sorting is important when there are hashtags that are part of other hashtags
1954                         // Otherwise there could be problems with hashtags like #test and #test2
1955                         // Because of this we are sorting from the longest to the shortest tag.
1956                         usort($tags, function ($a, $b) {
1957                                 return strlen($b) <=> strlen($a);
1958                         });
1959
1960                         $URLSearchString = "^\[\]";
1961
1962                         // All hashtags should point to the home server if "local_tags" is activated
1963                         if (DI::config()->get('system', 'local_tags')) {
1964                                 $body = preg_replace("/#\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",
1965                                         "#[url=" . DI::baseUrl() . "/search?tag=$2]$2[/url]", $body);
1966                         }
1967
1968                         // mask hashtags inside of url, bookmarks and attachments to avoid urls in urls
1969                         $body = preg_replace_callback("/\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",
1970                                 function ($match) {
1971                                         return ("[url=" . str_replace("#", "&num;", $match[1]) . "]" . str_replace("#", "&num;", $match[2]) . "[/url]");
1972                                 }, $body);
1973
1974                         $body = preg_replace_callback("/\[bookmark\=([$URLSearchString]*)\](.*?)\[\/bookmark\]/ism",
1975                                 function ($match) {
1976                                         return ("[bookmark=" . str_replace("#", "&num;", $match[1]) . "]" . str_replace("#", "&num;", $match[2]) . "[/bookmark]");
1977                                 }, $body);
1978
1979                         $body = preg_replace_callback("/\[attachment (.*?)\](.*?)\[\/attachment\]/ism",
1980                                 function ($match) {
1981                                         return ("[attachment " . str_replace("#", "&num;", $match[1]) . "]" . $match[2] . "[/attachment]");
1982                                 }, $body);
1983
1984                         // Repair recursive urls
1985                         $body = preg_replace("/&num;\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",
1986                                 "&num;$2", $body);
1987
1988                         foreach ($tags as $tag) {
1989                                 if ((strpos($tag, '#') !== 0) || strpos($tag, '[url=') || strlen($tag) < 2 || $tag[1] == '#') {
1990                                         continue;
1991                                 }
1992
1993                                 $basetag = str_replace('_', ' ', substr($tag, 1));
1994                                 $newtag = '#[url=' . DI::baseUrl() . '/search?tag=' . $basetag . ']' . $basetag . '[/url]';
1995
1996                                 $body = str_replace($tag, $newtag, $body);
1997                         }
1998
1999                         // Convert back the masked hashtags
2000                         $body = str_replace("&num;", "#", $body);
2001
2002                         return $body;
2003                 });
2004
2005                 return $body;
2006         }
2007
2008         /**
2009          * look for mention tags and setup a second delivery chain for forum/community posts if appropriate
2010          *
2011          * @param int $uid
2012          * @param int $item_id
2013          * @return boolean true if item was deleted, else false
2014          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
2015          * @throws \ImagickException
2016          */
2017         private static function tagDeliver(int $uid, int $item_id): bool
2018         {
2019                 $mention = false;
2020
2021                 $owner = User::getOwnerDataById($uid);
2022                 if (!DBA::isResult($owner)) {
2023                         Logger::warning('User not found, quitting here.', ['uid' => $uid]);
2024                         return false;
2025                 }
2026
2027                 if ($owner['contact-type'] != User::ACCOUNT_TYPE_COMMUNITY) {
2028                         Logger::debug('Owner is no community, quitting here.', ['uid' => $uid, 'id' => $item_id]);
2029                         return false;
2030                 }
2031
2032                 $item = Post::selectFirst(self::ITEM_FIELDLIST, ['id' => $item_id, 'gravity' => [GRAVITY_PARENT, GRAVITY_COMMENT], 'origin' => false]);
2033                 if (!DBA::isResult($item)) {
2034                         Logger::debug('Post is an activity or origin or not found at all, quitting here.', ['id' => $item_id]);
2035                         return false;
2036                 }
2037
2038                 if ($item['gravity'] == GRAVITY_PARENT) {
2039                         $tags = Tag::getByURIId($item['uri-id'], [Tag::MENTION, Tag::EXCLUSIVE_MENTION]);
2040                         foreach ($tags as $tag) {
2041                                 if (Strings::compareLink($owner['url'], $tag['url'])) {
2042                                         $mention = true;
2043                                         Logger::info('Mention found in tag.', ['url' => $tag['url'], 'uri' => $item['uri'], 'uid' => $uid, 'id' => $item_id, 'uri-id' => $item['uri-id'], 'guid' => $item['guid']]);
2044                                 }
2045                         }
2046
2047                         if (!$mention) {
2048                                 Logger::info('Top-level post without mention is deleted.', ['uri' => $item['uri'], $uid, 'id' => $item_id, 'uri-id' => $item['uri-id'], 'guid' => $item['guid']]);
2049                                 Post\User::delete(['uri-id' => $item['uri-id'], 'uid' => $item['uid']]);
2050                                 return true;
2051                         }
2052
2053                         $arr = ['item' => $item, 'user' => $owner];
2054
2055                         Hook::callAll('tagged', $arr);
2056                 } else {
2057                         $tags = Tag::getByURIId($item['parent-uri-id'], [Tag::MENTION, Tag::EXCLUSIVE_MENTION]);
2058                         foreach ($tags as $tag) {
2059                                 if (Strings::compareLink($owner['url'], $tag['url'])) {
2060                                         $mention = true;
2061                                         Logger::info('Mention found in parent tag.', ['url' => $tag['url'], 'uri' => $item['uri'], 'uid' => $uid, 'id' => $item_id, 'uri-id' => $item['uri-id'], 'guid' => $item['guid']]);
2062                                 }
2063                         }
2064
2065                         if (!$mention) {
2066                                 Logger::debug('No mentions found in parent, quitting here.', ['id' => $item_id, 'uri-id' => $item['uri-id'], 'guid' => $item['guid']]);
2067                                 return false;
2068                         }
2069                 }
2070
2071                 Logger::info('Community post will be distributed', ['uri' => $item['uri'], 'uid' => $uid, 'id' => $item_id, 'uri-id' => $item['uri-id'], 'guid' => $item['guid']]);
2072
2073                 if ($owner['page-flags'] == User::PAGE_FLAGS_PRVGROUP) {
2074                         $allow_cid = '';
2075                         $allow_gid = '<' . Group::FOLLOWERS . '>';
2076                         $deny_cid  = '';
2077                         $deny_gid  = '';
2078                         self::performActivity($item['id'], 'announce', $uid, $allow_cid, $allow_gid, $deny_cid, $deny_gid);
2079                 } else {
2080                         self::performActivity($item['id'], 'announce', $uid);
2081                 }
2082
2083                 Logger::info('Community post had been distributed', ['uri' => $item['uri'], 'uid' => $uid, 'id' => $item_id, 'uri-id' => $item['uri-id'], 'guid' => $item['guid']]);
2084                 return false;
2085         }
2086
2087         /**
2088          * Automatically reshare the item if the "remote_self" option is selected
2089          *
2090          * @param array $item
2091          * @return void
2092          */
2093         private static function autoReshare(array $item)
2094         {
2095                 if ($item['gravity'] != GRAVITY_PARENT) {
2096                         return;
2097                 }
2098
2099                 if (!DBA::exists('contact', ['id' => $item['contact-id'], 'remote_self' => Contact::MIRROR_NATIVE_RESHARE])) {
2100                         return;
2101                 }
2102
2103                 if (!in_array($item['network'], [Protocol::ACTIVITYPUB, Protocol::DFRN])) {
2104                         return;
2105                 }
2106
2107                 Logger::info('Automatically reshare item', ['uid' => $item['uid'], 'id' => $item['id'], 'guid' => $item['guid'], 'uri-id' => $item['uri-id']]);
2108
2109                 self::performActivity($item['id'], 'announce', $item['uid']);
2110         }
2111
2112         public static function isRemoteSelf(array $contact, array &$datarray): bool
2113         {
2114                 if (!$contact['remote_self']) {
2115                         return false;
2116                 }
2117
2118                 // Prevent the forwarding of posts that are forwarded
2119                 if (!empty($datarray["extid"]) && ($datarray["extid"] == Protocol::DFRN)) {
2120                         Logger::info('Already forwarded');
2121                         return false;
2122                 }
2123
2124                 // Prevent to forward already forwarded posts
2125                 if ($datarray["app"] == DI::baseUrl()->getHostname()) {
2126                         Logger::info('Already forwarded (second test)');
2127                         return false;
2128                 }
2129
2130                 // Only forward posts
2131                 if ($datarray["verb"] != Activity::POST) {
2132                         Logger::info('No post');
2133                         return false;
2134                 }
2135
2136                 if (($contact['network'] != Protocol::FEED) && ($datarray['private'] == self::PRIVATE)) {
2137                         Logger::info('Not public');
2138                         return false;
2139                 }
2140
2141                 $datarray2 = $datarray;
2142                 Logger::info('remote-self start', ['contact' => $contact['url'], 'remote_self'=> $contact['remote_self'], 'item' => $datarray]);
2143                 if ($contact['remote_self'] == Contact::MIRROR_OWN_POST) {
2144                         $self = DBA::selectFirst('contact', ['id', 'name', 'url', 'thumb'],
2145                                         ['uid' => $contact['uid'], 'self' => true]);
2146                         if (DBA::isResult($self)) {
2147                                 $datarray['contact-id'] = $self["id"];
2148
2149                                 $datarray['owner-name'] = $self["name"];
2150                                 $datarray['owner-link'] = $self["url"];
2151                                 $datarray['owner-avatar'] = $self["thumb"];
2152
2153                                 $datarray['author-name']   = $datarray['owner-name'];
2154                                 $datarray['author-link']   = $datarray['owner-link'];
2155                                 $datarray['author-avatar'] = $datarray['owner-avatar'];
2156
2157                                 unset($datarray['edited']);
2158
2159                                 unset($datarray['network']);
2160                                 unset($datarray['owner-id']);
2161                                 unset($datarray['author-id']);
2162                         }
2163
2164                         if ($contact['network'] != Protocol::FEED) {
2165                                 $old_uri_id = $datarray["uri-id"] ?? 0;
2166                                 $datarray["guid"] = System::createUUID();
2167                                 unset($datarray["plink"]);
2168                                 $datarray["uri"] = self::newURI($datarray["guid"]);
2169                                 $datarray["uri-id"] = ItemURI::getIdByURI($datarray["uri"]);
2170                                 $datarray["extid"] = Protocol::DFRN;
2171                                 $urlpart = parse_url($datarray2['author-link']);
2172                                 $datarray["app"] = $urlpart["host"];
2173                                 if (!empty($old_uri_id)) {
2174                                         Post\Media::copy($old_uri_id, $datarray["uri-id"]);
2175                                 }
2176
2177                                 unset($datarray["parent-uri"]);
2178                                 unset($datarray["thr-parent"]);
2179                         } else {
2180                                 $datarray['private'] = self::PUBLIC;
2181                         }
2182                 }
2183
2184                 if ($contact['network'] != Protocol::FEED) {
2185                         // Store the original post
2186                         $result = self::insert($datarray2);
2187                         Logger::info('remote-self post original item', ['contact' => $contact['url'], 'result'=> $result, 'item' => $datarray2]);
2188                 } else {
2189                         $datarray["app"] = "Feed";
2190                         $result = true;
2191                 }
2192
2193                 return (bool)$result;
2194         }
2195
2196         /**
2197          *
2198          * @param string $s
2199          * @param int    $uid
2200          * @param array  $item
2201          * @param int    $cid
2202          * @return string
2203          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
2204          * @throws \ImagickException
2205          */
2206         public static function fixPrivatePhotos(string $s, int $uid, array $item = null, int $cid = 0): string
2207         {
2208                 if (DI::config()->get('system', 'disable_embedded')) {
2209                         return $s;
2210                 }
2211
2212                 Logger::info('check for photos');
2213                 $site = substr(DI::baseUrl(), strpos(DI::baseUrl(), '://'));
2214
2215                 $orig_body = $s;
2216                 $new_body = '';
2217
2218                 $img_start = strpos($orig_body, '[img');
2219                 $img_st_close = ($img_start !== false ? strpos(substr($orig_body, $img_start), ']') : false);
2220                 $img_len = ($img_start !== false ? strpos(substr($orig_body, $img_start + $img_st_close + 1), '[/img]') : false);
2221
2222                 while (($img_st_close !== false) && ($img_len !== false)) {
2223                         $img_st_close++; // make it point to AFTER the closing bracket
2224                         $image = substr($orig_body, $img_start + $img_st_close, $img_len);
2225
2226                         Logger::info('found photo', ['image' => $image]);
2227
2228                         if (stristr($image, $site . '/photo/')) {
2229                                 // Only embed locally hosted photos
2230                                 $replace = false;
2231                                 $i = basename($image);
2232                                 $i = str_replace(['.jpg', '.png', '.gif'], ['', '', ''], $i);
2233                                 $x = strpos($i, '-');
2234
2235                                 if ($x) {
2236                                         $res = substr($i, $x + 1);
2237                                         $i = substr($i, 0, $x);
2238                                         $photo = Photo::getPhotoForUser($uid, $i, $res);
2239                                         if (DBA::isResult($photo)) {
2240                                                 /*
2241                                                  * Check to see if we should replace this photo link with an embedded image
2242                                                  * 1. No need to do so if the photo is public
2243                                                  * 2. If there's a contact-id provided, see if they're in the access list
2244                                                  *    for the photo. If so, embed it.
2245                                                  * 3. Otherwise, if we have an item, see if the item permissions match the photo
2246                                                  *    permissions, regardless of order but first check to see if they're an exact
2247                                                  *    match to save some processing overhead.
2248                                                  */
2249                                                 if (self::hasPermissions($photo)) {
2250                                                         if ($cid) {
2251                                                                 $recips = self::enumeratePermissions($photo);
2252                                                                 if (in_array($cid, $recips)) {
2253                                                                         $replace = true;
2254                                                                 }
2255                                                         } elseif ($item) {
2256                                                                 if (self::samePermissions($uid, $item, $photo)) {
2257                                                                         $replace = true;
2258                                                                 }
2259                                                         }
2260                                                 }
2261                                                 if ($replace) {
2262                                                         $photo_img = Photo::getImageForPhoto($photo);
2263                                                         // If a custom width and height were specified, apply before embedding
2264                                                         if (preg_match("/\[img\=([0-9]*)x([0-9]*)\]/is", substr($orig_body, $img_start, $img_st_close), $match)) {
2265                                                                 Logger::info('scaling photo');
2266
2267                                                                 $width = intval($match[1]);
2268                                                                 $height = intval($match[2]);
2269
2270                                                                 $photo_img->scaleDown(max($width, $height));
2271                                                         }
2272
2273                                                         $data = $photo_img->asString();
2274                                                         $type = $photo_img->getType();
2275
2276                                                         Logger::info('replacing photo');
2277                                                         $image = 'data:' . $type . ';base64,' . base64_encode($data);
2278                                                         Logger::debug('replaced', ['image' => $image]);
2279                                                 }
2280                                         }
2281                                 }
2282                         }
2283
2284                         $new_body = $new_body . substr($orig_body, 0, $img_start + $img_st_close) . $image . '[/img]';
2285                         $orig_body = substr($orig_body, $img_start + $img_st_close + $img_len + strlen('[/img]'));
2286                         if ($orig_body === false) {
2287                                 $orig_body = '';
2288                         }
2289
2290                         $img_start = strpos($orig_body, '[img');
2291                         $img_st_close = ($img_start !== false ? strpos(substr($orig_body, $img_start), ']') : false);
2292                         $img_len = ($img_start !== false ? strpos(substr($orig_body, $img_start + $img_st_close + 1), '[/img]') : false);
2293                 }
2294
2295                 $new_body = $new_body . $orig_body;
2296
2297                 return $new_body;
2298         }
2299
2300         private static function hasPermissions(array $obj)
2301         {
2302                 return !empty($obj['allow_cid']) || !empty($obj['allow_gid']) ||
2303                         !empty($obj['deny_cid']) || !empty($obj['deny_gid']);
2304         }
2305
2306         // @TODO $uid is unused parameter
2307         private static function samePermissions($uid, array $obj1, array $obj2): bool
2308         {
2309                 // first part is easy. Check that these are exactly the same.
2310                 if (($obj1['allow_cid'] == $obj2['allow_cid'])
2311                         && ($obj1['allow_gid'] == $obj2['allow_gid'])
2312                         && ($obj1['deny_cid'] == $obj2['deny_cid'])
2313                         && ($obj1['deny_gid'] == $obj2['deny_gid'])) {
2314                         return true;
2315                 }
2316
2317                 // This is harder. Parse all the permissions and compare the resulting set.
2318                 $recipients1 = self::enumeratePermissions($obj1);
2319                 $recipients2 = self::enumeratePermissions($obj2);
2320                 sort($recipients1);
2321                 sort($recipients2);
2322
2323                 /// @TODO Comparison of arrays, maybe use array_diff_assoc() here?
2324                 return ($recipients1 == $recipients2);
2325         }
2326
2327         /**
2328          * Returns an array of contact-ids that are allowed to see this object
2329          *
2330          * @param array $obj        Item array with at least uid, allow_cid, allow_gid, deny_cid and deny_gid
2331          * @param bool  $check_dead Prunes unavailable contacts from the result
2332          * @return array
2333          * @throws \Exception
2334          */
2335         public static function enumeratePermissions(array $obj, bool $check_dead = false): array
2336         {
2337                 $aclFormater = DI::aclFormatter();
2338
2339                 $allow_people = $aclFormater->expand($obj['allow_cid']);
2340                 $allow_groups = Group::expand($obj['uid'], $aclFormater->expand($obj['allow_gid']), $check_dead);
2341                 $deny_people  = $aclFormater->expand($obj['deny_cid']);
2342                 $deny_groups  = Group::expand($obj['uid'], $aclFormater->expand($obj['deny_gid']), $check_dead);
2343                 $recipients   = array_unique(array_merge($allow_people, $allow_groups));
2344                 $deny         = array_unique(array_merge($deny_people, $deny_groups));
2345                 $recipients   = array_diff($recipients, $deny);
2346                 return $recipients;
2347         }
2348
2349         public static function expire(int $uid, int $days, string $network = "", bool $force = false)
2350         {
2351                 if (!$uid || ($days < 1)) {
2352                         return;
2353                 }
2354
2355                 $condition = ["`uid` = ? AND NOT `deleted` AND `gravity` = ?",
2356                         $uid, GRAVITY_PARENT];
2357
2358                 /*
2359                  * $expire_network_only = save your own wall posts
2360                  * and just expire conversations started by others
2361                  */
2362                 $expire_network_only = DI::pConfig()->get($uid, 'expire', 'network_only', false);
2363
2364                 if ($expire_network_only) {
2365                         $condition[0] .= " AND NOT `wall`";
2366                 }
2367
2368                 if ($network != "") {
2369                         $condition[0] .= " AND `network` = ?";
2370                         $condition[] = $network;
2371                 }
2372
2373                 $condition[0] .= " AND `received` < ?";
2374                 $condition[] = DateTimeFormat::utc('now - ' . $days . ' day');
2375
2376                 $items = Post::select(['resource-id', 'starred', 'id', 'post-type', 'uid', 'uri-id'], $condition);
2377
2378                 if (!DBA::isResult($items)) {
2379                         return;
2380                 }
2381
2382                 $expire_items = DI::pConfig()->get($uid, 'expire', 'items', true);
2383
2384                 // Forcing expiring of items - but not notes and marked items
2385                 if ($force) {
2386                         $expire_items = true;
2387                 }
2388
2389                 $expire_notes = DI::pConfig()->get($uid, 'expire', 'notes', true);
2390                 $expire_starred = DI::pConfig()->get($uid, 'expire', 'starred', true);
2391                 $expire_photos = DI::pConfig()->get($uid, 'expire', 'photos', false);
2392
2393                 $expired = 0;
2394
2395                 $priority = DI::config()->get('system', 'expire-notify-priority');
2396
2397                 while ($item = Post::fetch($items)) {
2398                         // don't expire filed items
2399                         if (DBA::exists('post-category', ['uri-id' => $item['uri-id'], 'uid' => $item['uid'], 'type' => Post\Category::FILE])) {
2400                                 continue;
2401                         }
2402
2403                         // Only expire posts, not photos and photo comments
2404
2405                         if (!$expire_photos && !empty($item['resource-id'])) {
2406                                 continue;
2407                         } elseif (!$expire_starred && intval($item['starred'])) {
2408                                 continue;
2409                         } elseif (!$expire_notes && ($item['post-type'] == self::PT_PERSONAL_NOTE)) {
2410                                 continue;
2411                         } elseif (!$expire_items && ($item['post-type'] != self::PT_PERSONAL_NOTE)) {
2412                                 continue;
2413                         }
2414
2415                         self::markForDeletionById($item['id'], $priority);
2416
2417                         ++$expired;
2418                 }
2419                 DBA::close($items);
2420                 Logger::notice('User ' . $uid . ": expired $expired items; expire items: $expire_items, expire notes: $expire_notes, expire starred: $expire_starred, expire photos: $expire_photos");
2421         }
2422
2423         public static function firstPostDate(int $uid, bool $wall = false)
2424         {
2425                 $user = User::getById($uid, ['register_date']);
2426                 if (empty($user)) {
2427                         return false;
2428                 }
2429
2430                 $condition = ["`uid` = ? AND `wall` = ? AND NOT `deleted` AND `visible` AND `received` >= ?",
2431                         $uid, $wall, $user['register_date']];
2432                 $params = ['order' => ['received' => false]];
2433                 $thread = Post::selectFirstThread(['received'], $condition, $params);
2434                 if (DBA::isResult($thread)) {
2435                         $postdate = substr(DateTimeFormat::local($thread['received']), 0, 10);
2436                         return $postdate;
2437                 }
2438                 return false;
2439         }
2440
2441         /**
2442          * add/remove activity to an item
2443          *
2444          * Toggle activities as like,dislike,attend of an item
2445          *
2446          * @param int    $item_id
2447          * @param string $verb
2448          *            Activity verb. One of
2449          *            like, unlike, dislike, undislike, attendyes, unattendyes,
2450          *            attendno, unattendno, attendmaybe, unattendmaybe,
2451          *            announce, unannouce
2452          * @param int    $uid
2453          * @param string $allow_cid
2454          * @param string $allow_gid
2455          * @param string $deny_cid
2456          * @param string $deny_gid
2457          * @return bool
2458          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
2459          * @throws \ImagickException
2460          * @hook  'post_local_end'
2461          *            array $arr
2462          *            'post_id' => ID of posted item
2463          */
2464         public static function performActivity(int $item_id, string $verb, int $uid, string $allow_cid = null, string $allow_gid = null, string $deny_cid = null, string $deny_gid = null): bool
2465         {
2466                 if (empty($uid)) {
2467                         return false;
2468                 }
2469
2470                 Logger::notice('Start create activity', ['verb' => $verb, 'item' => $item_id, 'user' => $uid]);
2471
2472                 $item = Post::selectFirst(self::ITEM_FIELDLIST, ['id' => $item_id]);
2473                 if (!DBA::isResult($item)) {
2474                         Logger::notice('like: unknown item', ['id' => $item_id]);
2475                         return false;
2476                 }
2477
2478                 $uri_id = $item['uri-id'];
2479
2480                 if (!in_array($item['uid'], [0, $uid])) {
2481                         return false;
2482                 }
2483
2484                 if (!Post::exists(['uri-id' => $item['parent-uri-id'], 'uid' => $uid])) {
2485                         $stored = self::storeForUserByUriId($item['parent-uri-id'], $uid);
2486                         if (($item['parent-uri-id'] == $item['uri-id']) && !empty($stored)) {
2487                                 $item = Post::selectFirst(self::ITEM_FIELDLIST, ['id' => $stored]);
2488                                 if (!DBA::isResult($item)) {
2489                                         Logger::info('Could not fetch just created item - should not happen', ['stored' => $stored, 'uid' => $uid, 'uri-id' => $uri_id]);
2490                                         return false;
2491                                 }
2492                         }
2493                 }
2494
2495                 // Retrieves the local post owner
2496                 $owner = User::getOwnerDataById($uid);
2497                 if (empty($owner)) {
2498                         Logger::info('Empty owner for user', ['uid' => $uid]);
2499                         return false;
2500                 }
2501
2502                 // Retrieve the current logged in user's public contact
2503                 $author_id = Contact::getIdForURL($owner['url']);
2504                 if (empty($author_id)) {
2505                         Logger::info('Empty public contact');
2506                         return false;
2507                 }
2508
2509                 $activity = null;
2510                 switch ($verb) {
2511                         case 'like':
2512                         case 'unlike':
2513                                 $activity = Activity::LIKE;
2514                                 break;
2515                         case 'dislike':
2516                         case 'undislike':
2517                                 $activity = Activity::DISLIKE;
2518                                 break;
2519                         case 'attendyes':
2520                         case 'unattendyes':
2521                                 $activity = Activity::ATTEND;
2522                                 break;
2523                         case 'attendno':
2524                         case 'unattendno':
2525                                 $activity = Activity::ATTENDNO;
2526                                 break;
2527                         case 'attendmaybe':
2528                         case 'unattendmaybe':
2529                                 $activity = Activity::ATTENDMAYBE;
2530                                 break;
2531                         case 'follow':
2532                         case 'unfollow':
2533                                 $activity = Activity::FOLLOW;
2534                                 break;
2535                         case 'announce':
2536                         case 'unannounce':
2537                                 $activity = Activity::ANNOUNCE;
2538                                 break;
2539                         default:
2540                                 Logger::notice('unknown verb', ['verb' => $verb, 'item' => $item_id]);
2541                                 return false;
2542                 }
2543
2544                 $mode = Strings::startsWith($verb, 'un') ? 'delete' : 'create';
2545
2546                 // Enable activity toggling instead of on/off
2547                 $event_verb_flag = $activity === Activity::ATTEND || $activity === Activity::ATTENDNO || $activity === Activity::ATTENDMAYBE;
2548
2549                 // Look for an existing verb row
2550                 // Event participation activities are mutually exclusive, only one of them can exist at all times.
2551                 if ($event_verb_flag) {
2552                         $verbs = [Activity::ATTEND, Activity::ATTENDNO, Activity::ATTENDMAYBE];
2553
2554                         // Translate to the index based activity index
2555                         $vids = [];
2556                         foreach ($verbs as $verb) {
2557                                 $vids[] = Verb::getID($verb);
2558                         }
2559                 } else {
2560                         $vids = Verb::getID($activity);
2561                 }
2562
2563                 $condition = ['vid' => $vids, 'deleted' => false, 'gravity' => GRAVITY_ACTIVITY,
2564                         'author-id' => $author_id, 'uid' => $item['uid'], 'thr-parent-id' => $uri_id];
2565                 $like_item = Post::selectFirst(['id', 'guid', 'verb'], $condition);
2566
2567                 if (DBA::isResult($like_item)) {
2568                         /**
2569                          * Truth table for existing activities
2570                          *
2571                          * |          Inputs            ||      Outputs      |
2572                          * |----------------------------||-------------------|
2573                          * |  Mode  | Event | Same verb || Delete? | Return? |
2574                          * |--------|-------|-----------||---------|---------|
2575                          * | create |  Yes  |    Yes    ||   No    |   Yes   |
2576                          * | create |  Yes  |    No     ||   Yes   |   No    |
2577                          * | create |  No   |    Yes    ||   No    |   Yes   |
2578                          * | create |  No   |    No     ||        N/A†       |
2579                          * | delete |  Yes  |    Yes    ||   Yes   |   N/A‡  |
2580                          * | delete |  Yes  |    No     ||   No    |   N/A‡  |
2581                          * | delete |  No   |    Yes    ||   Yes   |   N/A‡  |
2582                          * | delete |  No   |    No     ||        N/A†       |
2583                          * |--------|-------|-----------||---------|---------|
2584                          * |   A    |   B   |     C     || A xor C | !B or C |
2585                          *
2586                          * † Can't happen: It's impossible to find an existing non-event activity without
2587                          *                 the same verb because we are only looking for this single verb.
2588                          *
2589                          * ‡ The "mode = delete" is returning early whether an existing activity was found or not.
2590                          */
2591                         if ($mode == 'create' xor $like_item['verb'] == $activity) {
2592                                 self::markForDeletionById($like_item['id']);
2593                         }
2594
2595                         if (!$event_verb_flag || $like_item['verb'] == $activity) {
2596                                 return true;
2597                         }
2598                 }
2599
2600                 // No need to go further if we aren't creating anything
2601                 if ($mode == 'delete') {
2602                         return true;
2603                 }
2604
2605                 $objtype = $item['resource-id'] ? Activity\ObjectType::IMAGE : Activity\ObjectType::NOTE;
2606
2607                 $new_item = [
2608                         'guid'          => System::createUUID(),
2609                         'uri'           => self::newURI(),
2610                         'uid'           => $item['uid'],
2611                         'contact-id'    => $owner['id'],
2612                         'wall'          => $item['wall'],
2613                         'origin'        => 1,
2614                         'network'       => Protocol::DFRN,
2615                         'protocol'      => Conversation::PARCEL_DIRECT,
2616                         'direction'     => Conversation::PUSH,
2617                         'gravity'       => GRAVITY_ACTIVITY,
2618                         'parent'        => $item['id'],
2619                         'thr-parent'    => $item['uri'],
2620                         'owner-id'      => $author_id,
2621                         'author-id'     => $author_id,
2622                         'body'          => $activity,
2623                         'verb'          => $activity,
2624                         'object-type'   => $objtype,
2625                         'allow_cid'     => $allow_cid ?? $item['allow_cid'],
2626                         'allow_gid'     => $allow_gid ?? $item['allow_gid'],
2627                         'deny_cid'      => $deny_cid ?? $item['deny_cid'],
2628                         'deny_gid'      => $deny_gid ?? $item['deny_gid'],
2629                         'visible'       => 1,
2630                         'unseen'        => 1,
2631                 ];
2632
2633                 $signed = Diaspora::createLikeSignature($uid, $new_item);
2634                 if (!empty($signed)) {
2635                         $new_item['diaspora_signed_text'] = json_encode($signed);
2636                 }
2637
2638                 $new_item_id = self::insert($new_item);
2639
2640                 // If the parent item isn't visible then set it to visible
2641                 if (!$item['visible']) {
2642                         self::update(['visible' => true], ['id' => $item['id']]);
2643                 }
2644
2645                 $new_item['id'] = $new_item_id;
2646
2647                 Hook::callAll('post_local_end', $new_item);
2648
2649                 return true;
2650         }
2651
2652         /**
2653          * Fetch the SQL condition for the given user id
2654          *
2655          * @param integer $owner_id User ID for which the permissions should be fetched
2656          * @return array condition
2657          */
2658         public static function getPermissionsConditionArrayByUserId(int $owner_id): array
2659         {
2660                 $local_user = local_user();
2661                 $remote_user = Session::getRemoteContactID($owner_id);
2662
2663                 // default permissions - anonymous user
2664                 $condition = ["`private` != ?", self::PRIVATE];
2665
2666                 if ($local_user && ($local_user == $owner_id)) {
2667                         // Profile owner - everything is visible
2668                         $condition = [];
2669                 } elseif ($remote_user) {
2670                          // Authenticated visitor - fetch the matching permissionsets
2671                         $permissionSets = DI::permissionSet()->selectByContactId($remote_user, $owner_id);
2672                         if (!empty($set)) {
2673                                 $condition = ["(`private` != ? OR (`private` = ? AND `wall`
2674                                         AND `psid` IN (" . implode(', ', array_fill(0, count($set), '?')) . ")))",
2675                                         self::PRIVATE, self::PRIVATE];
2676                                 $condition = array_merge($condition, $permissionSets->column('id'));
2677                         }
2678                 }
2679
2680                 return $condition;
2681         }
2682
2683         /**
2684          * Get a permission SQL string for the given user
2685          *
2686          * @param int $owner_id
2687          * @param string $table
2688          * @return string
2689          */
2690         public static function getPermissionsSQLByUserId(int $owner_id, string $table = ''): string
2691         {
2692                 $local_user = local_user();
2693                 $remote_user = Session::getRemoteContactID($owner_id);
2694
2695                 if (!empty($table)) {
2696                         $table = DBA::quoteIdentifier($table) . '.';
2697                 }
2698
2699                 /*
2700                  * Construct permissions
2701                  *
2702                  * default permissions - anonymous user
2703                  */
2704                 $sql = sprintf(" AND " . $table . "`private` != %d", self::PRIVATE);
2705
2706                 // Profile owner - everything is visible
2707                 if ($local_user && ($local_user == $owner_id)) {
2708                         $sql = '';
2709                 } elseif ($remote_user) {
2710                         /*
2711                          * Authenticated visitor. Unless pre-verified,
2712                          * check that the contact belongs to this $owner_id
2713                          * and load the groups the visitor belongs to.
2714                          * If pre-verified, the caller is expected to have already
2715                          * done this and passed the groups into this function.
2716                          */
2717                         $permissionSets = DI::permissionSet()->selectByContactId($remote_user, $owner_id);
2718
2719                         if (!empty($set)) {
2720                                 $sql_set = sprintf(" OR (" . $table . "`private` = %d AND " . $table . "`wall` AND " . $table . "`psid` IN (", self::PRIVATE) . implode(',', $permissionSets->column('id')) . "))";
2721                         } else {
2722                                 $sql_set = '';
2723                         }
2724
2725                         $sql = sprintf(" AND (" . $table . "`private` != %d", self::PRIVATE) . $sql_set . ")";
2726                 }
2727
2728                 return $sql;
2729         }
2730
2731         /**
2732          * get translated item type
2733          *
2734          * @param array                $item
2735          * @param \Friendica\Core\L10n $l10n
2736          * @return string
2737          */
2738         public static function postType(array $item, \Friendica\Core\L10n $l10n): string
2739         {
2740                 if (!empty($item['event-id'])) {
2741                         return $l10n->t('event');
2742                 } elseif (!empty($item['resource-id'])) {
2743                         return $l10n->t('photo');
2744                 } elseif ($item['gravity'] == GRAVITY_ACTIVITY) {
2745                         return $l10n->t('activity');
2746                 } elseif ($item['gravity'] == GRAVITY_COMMENT) {
2747                         return $l10n->t('comment');
2748                 }
2749
2750                 return $l10n->t('post');
2751         }
2752
2753         /**
2754          * Sets the "rendered-html" field of the provided item
2755          *
2756          * Body is preserved to avoid side-effects as we modify it just-in-time for spoilers and private image links
2757          *
2758          * @param array $item
2759          *
2760          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
2761          * @todo Remove reference, simply return "rendered-html" and "rendered-hash"
2762          */
2763         private static function putInCache(&$item)
2764         {
2765                 // Save original body to prevent addons to modify it
2766                 $body = $item['body'];
2767
2768                 $rendered_hash = $item['rendered-hash'] ?? '';
2769                 $rendered_html = $item['rendered-html'] ?? '';
2770
2771                 if ($rendered_hash == ''
2772                         || $rendered_html == ''
2773                         || $rendered_hash != hash('md5', BBCode::VERSION . '::' . $body)
2774                         || DI::config()->get('system', 'ignore_cache')
2775                 ) {
2776                         $item['rendered-html'] = BBCode::convertForUriId($item['uri-id'], $item['body']);
2777                         $item['rendered-hash'] = hash('md5', BBCode::VERSION . '::' . $body);
2778
2779                         $hook_data = ['item' => $item, 'rendered-html' => $item['rendered-html'], 'rendered-hash' => $item['rendered-hash']];
2780                         Hook::callAll('put_item_in_cache', $hook_data);
2781                         $item['rendered-html'] = $hook_data['rendered-html'];
2782                         $item['rendered-hash'] = $hook_data['rendered-hash'];
2783                         unset($hook_data);
2784
2785                         // Update if the generated values differ from the existing ones
2786                         if ((($rendered_hash != $item['rendered-hash']) || ($rendered_html != $item['rendered-html'])) && !empty($item['id'])) {
2787                                 self::update(
2788                                         [
2789                                                 'rendered-html' => $item['rendered-html'],
2790                                                 'rendered-hash' => $item['rendered-hash']
2791                                         ],
2792                                         ['id' => $item['id']]
2793                                 );
2794                         }
2795                 }
2796
2797                 $item['body'] = $body;
2798         }
2799
2800         /**
2801          * Given an item array, convert the body element from bbcode to html and add smilie icons.
2802          * If attach is true, also add icons for item attachments.
2803          *
2804          * @param array   $item Record from item table
2805          * @param boolean $attach If true, add icons for item attachments as well
2806          * @param boolean $is_preview Whether this is a preview
2807          * @param boolean $only_cache Whether only cached HTML should be updated
2808          * @return string item body html
2809          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
2810          * @throws \ImagickException
2811          * @hook  prepare_body_init item array before any work
2812          * @hook  prepare_body_content_filter ('item'=>item array, 'filter_reasons'=>string array) before first bbcode to html
2813          * @hook  prepare_body ('item'=>item array, 'html'=>body string, 'is_preview'=>boolean, 'filter_reasons'=>string array) after first bbcode to html
2814          * @hook  prepare_body_final ('item'=>item array, 'html'=>body string) after attach icons and blockquote special case handling (spoiler, author)
2815          */
2816         public static function prepareBody(array &$item, bool $attach = false, bool $is_preview = false, bool $only_cache = false): string
2817         {
2818                 $a = DI::app();
2819                 Hook::callAll('prepare_body_init', $item);
2820
2821                 // In order to provide theme developers more possibilities, event items
2822                 // are treated differently.
2823                 if ($item['object-type'] === Activity\ObjectType::EVENT && isset($item['event-id'])) {
2824                         $ev = Event::getItemHTML($item);
2825                         return $ev;
2826                 }
2827
2828                 $tags = Tag::populateFromItem($item);
2829
2830                 $item['tags'] = $tags['tags'];
2831                 $item['hashtags'] = $tags['hashtags'];
2832                 $item['mentions'] = $tags['mentions'];
2833
2834                 $body = $item['body'] ?? '';
2835                 $shared = BBCode::fetchShareAttributes($body);
2836                 if (!empty($shared['guid'])) {
2837                         $shared_item = Post::selectFirst(['uri-id', 'plink', 'has-media'], ['guid' => $shared['guid']]);
2838                         $shared_uri_id = $shared_item['uri-id'] ?? 0;
2839                         $shared_links = [strtolower($shared_item['plink'] ?? '')];
2840                         $shared_attachments = Post\Media::splitAttachments($shared_uri_id, $shared['guid'], [], $shared_item['has-media'] ?? false);
2841                         $shared_links = array_merge($shared_links, array_column($shared_attachments['visual'], 'url'));
2842                         $shared_links = array_merge($shared_links, array_column($shared_attachments['link'], 'url'));
2843                         $shared_links = array_merge($shared_links, array_column($shared_attachments['additional'], 'url'));
2844                         $item['body'] = self::replaceVisualAttachments($shared_attachments, $item['body']);
2845                 } else {
2846                         $shared_uri_id = 0;
2847                         $shared_links = [];
2848                 }
2849
2850                 $attachments = Post\Media::splitAttachments($item['uri-id'], $item['guid'] ?? '', $shared_links, $item['has-media'] ?? false);
2851                 $item['body'] = self::replaceVisualAttachments($attachments, $item['body'] ?? '');
2852
2853                 $item['body'] = preg_replace("/\s*\[attachment .*?\].*?\[\/attachment\]\s*/ism", "\n", $item['body']);
2854                 self::putInCache($item);
2855                 $item['body'] = $body;
2856                 $s = $item["rendered-html"];
2857
2858                 if ($only_cache) {
2859                         return '';
2860                 }
2861
2862                 // Compile eventual content filter reasons
2863                 $filter_reasons = [];
2864                 if (!$is_preview && public_contact() != $item['author-id']) {
2865                         if (!empty($item['content-warning']) && (!local_user() || !DI::pConfig()->get(local_user(), 'system', 'disable_cw', false))) {
2866                                 $filter_reasons[] = DI::l10n()->t('Content warning: %s', $item['content-warning']);
2867                         }
2868
2869                         $item['attachments'] = $attachments;
2870
2871                         $hook_data = [
2872                                 'item' => $item,
2873                                 'filter_reasons' => $filter_reasons
2874                         ];
2875                         Hook::callAll('prepare_body_content_filter', $hook_data);
2876                         $filter_reasons = $hook_data['filter_reasons'];
2877                         unset($hook_data);
2878                 }
2879
2880                 $hook_data = [
2881                         'item' => $item,
2882                         'html' => $s,
2883                         'preview' => $is_preview,
2884                         'filter_reasons' => $filter_reasons
2885                 ];
2886                 Hook::callAll('prepare_body', $hook_data);
2887                 $s = $hook_data['html'];
2888                 unset($hook_data);
2889
2890                 if (!$attach) {
2891                         // Replace the blockquotes with quotes that are used in mails.
2892                         $mailquote = '<blockquote type="cite" class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">';
2893                         $s = str_replace(['<blockquote>', '<blockquote class="spoiler">', '<blockquote class="author">'], [$mailquote, $mailquote, $mailquote], $s);
2894                         return $s;
2895                 }
2896
2897                 if (!empty($shared_attachments)) {
2898                         $s = self::addVisualAttachments($shared_attachments, $item, $s, true);
2899                         $s = self::addLinkAttachment($shared_uri_id ?: $item['uri-id'], $shared_attachments, $body, $s, true, []);
2900                         $s = self::addNonVisualAttachments($shared_attachments, $item, $s, true);
2901                         $body = preg_replace("/\s*\[share .*?\].*?\[\/share\]\s*/ism", '', $body);
2902                 }
2903
2904                 $s = self::addVisualAttachments($attachments, $item, $s, false);
2905                 $s = self::addLinkAttachment($item['uri-id'], $attachments, $body, $s, false, $shared_links);
2906                 $s = self::addNonVisualAttachments($attachments, $item, $s, false);
2907                 $s = self::addQuestions($item, $s);
2908
2909                 // Map.
2910                 if (strpos($s, '<div class="map">') !== false && !empty($item['coord'])) {
2911                         $x = Map::byCoordinates(trim($item['coord']));
2912                         if ($x) {
2913                                 $s = preg_replace('/\<div class\=\"map\"\>/', '$0' . $x, $s);
2914                         }
2915                 }
2916
2917                 // Replace friendica image url size with theme preference.
2918                 if (!empty($a->getThemeInfoValue('item_image_size'))) {
2919                         $ps = $a->getThemeInfoValue('item_image_size');
2920                         $s = preg_replace('|(<img[^>]+src="[^"]+/photo/[0-9a-f]+)-[0-9]|', "$1-" . $ps, $s);
2921                 }
2922
2923                 $s = HTML::applyContentFilter($s, $filter_reasons);
2924
2925                 $hook_data = ['item' => $item, 'html' => $s];
2926                 Hook::callAll('prepare_body_final', $hook_data);
2927
2928                 return $hook_data['html'];
2929         }
2930
2931         /**
2932          * Check if the body contains a link
2933          *
2934          * @param string $body
2935          * @param string $url
2936          * @param int    $type
2937          * @return bool
2938          */
2939         public static function containsLink(string $body, string $url, int $type = 0): bool
2940         {
2941                 // Make sure that for example site parameters aren't used when testing if the link is contained in the body
2942                 $urlparts = parse_url($url);
2943                 unset($urlparts['query']);
2944                 unset($urlparts['fragment']);
2945                 $url = Network::unparseURL($urlparts);
2946
2947                 // Remove media links to only search in embedded content
2948                 // @todo Check images for image link, audio for audio links, ...
2949                 if (in_array($type, [Post\Media::AUDIO, Post\Media::VIDEO, Post\Media::IMAGE])) {
2950                         $body = preg_replace("/\[url=[^\[\]]*\](.*)\[\/url\]/Usi", ' $1 ', $body);
2951                 }
2952
2953                 if (strpos($body, $url)) {
2954                         return true;
2955                 }
2956                 foreach ([0, 1, 2] as $size) {
2957                         if (preg_match('#/photo/.*-' . $size . '\.#ism', $url) &&
2958                                 strpos(preg_replace('#(/photo/.*)-[012]\.#ism', '$1-' . $size . '.', $body), $url)) {
2959                                 return true;
2960                         }
2961                 }
2962                 return false;
2963         }
2964
2965         /**
2966          * Replace visual attachments in the body
2967          *
2968          * @param array $attachments
2969          * @param string $body
2970          * @return string modified body
2971          */
2972         private static function replaceVisualAttachments(array $attachments, string $body): string
2973         {
2974                 DI::profiler()->startRecording('rendering');
2975
2976                 foreach ($attachments['visual'] as $attachment) {
2977                         if (!empty($attachment['preview'])) {
2978                                 $proxy   = Post\Media::getPreviewUrlForId($attachment['id'], Proxy::SIZE_LARGE);
2979                                 $search  = ['[img=' . $attachment['preview'] . ']', ']' . $attachment['preview'] . '[/img]'];
2980                                 $replace = ['[img=' . $proxy . ']', ']' . $proxy . '[/img]'];
2981
2982                                 $body = str_replace($search, $replace, $body);
2983                         } elseif ($attachment['filetype'] == 'image') {
2984                                 $proxy   = Post\Media::getUrlForId($attachment['id']);
2985                                 $search  = ['[img=' . $attachment['url'] . ']', ']' . $attachment['url'] . '[/img]'];
2986                                 $replace = ['[img=' . $proxy . ']', ']' . $proxy . '[/img]'];
2987
2988                                 $body = str_replace($search, $replace, $body);
2989                         }
2990                 }
2991                 DI::profiler()->stopRecording();
2992                 return $body;
2993         }
2994
2995         /**
2996          * Add visual attachments to the content
2997          *
2998          * @param array $attachments
2999          * @param array $item
3000          * @param string $content
3001          * @return string modified content
3002          */
3003         private static function addVisualAttachments(array $attachments, array $item, string $content, bool $shared): string
3004         {
3005                 DI::profiler()->startRecording('rendering');
3006                 $leading = '';
3007                 $trailing = '';
3008
3009                 // @todo In the future we should make a single for the template engine with all media in it. This allows more flexibilty.
3010                 foreach ($attachments['visual'] as $attachment) {
3011                         if (self::containsLink($item['body'], $attachment['preview'] ?? $attachment['url'], $attachment['type'])) {
3012                                 continue;
3013                         }
3014
3015                         if (!empty($attachment['preview'])) {
3016                                 $preview_url = Post\Media::getPreviewUrlForId($attachment['id'], Proxy::SIZE_LARGE);
3017                         } else {
3018                                 $preview_url = '';
3019                         }
3020
3021                         if (($attachment['filetype'] == 'video')) {
3022                                 /// @todo Move the template to /content as well
3023                                 $media = Renderer::replaceMacros(Renderer::getMarkupTemplate('video_top.tpl'), [
3024                                         '$video' => [
3025                                                 'id'      => $attachment['id'],
3026                                                 'src'     => $attachment['url'],
3027                                                 'name'    => $attachment['name'] ?: $attachment['url'],
3028                                                 'preview' => $preview_url,
3029                                                 'mime'    => $attachment['mimetype'],
3030                                         ],
3031                                 ]);
3032                                 if (($item['post-type'] ?? null) == Item::PT_VIDEO) {
3033                                         $leading .= $media;
3034                                 } else {
3035                                         $trailing .= $media;
3036                                 }
3037                         } elseif ($attachment['filetype'] == 'audio') {
3038                                 $media = Renderer::replaceMacros(Renderer::getMarkupTemplate('content/audio.tpl'), [
3039                                         '$audio' => [
3040                                                 'id'     => $attachment['id'],
3041                                                 'src'    => $attachment['url'],
3042                                                 'name'   => $attachment['name'] ?: $attachment['url'],
3043                                                 'mime'   => $attachment['mimetype'],
3044                                         ],
3045                                 ]);
3046                                 if (($item['post-type'] ?? null) == Item::PT_AUDIO) {
3047                                         $leading .= $media;
3048                                 } else {
3049                                         $trailing .= $media;
3050                                 }
3051                         } elseif ($attachment['filetype'] == 'image') {
3052                                 $media = Renderer::replaceMacros(Renderer::getMarkupTemplate('content/image.tpl'), [
3053                                         '$image' => [
3054                                                 'src'        => Post\Media::getUrlForId($attachment['id']),
3055                                                 'preview'    => Post\Media::getPreviewUrlForId($attachment['id'], ($attachment['width'] > $attachment['height']) ? Proxy::SIZE_MEDIUM : Proxy::SIZE_LARGE),
3056                                                 'attachment' => $attachment,
3057                                         ],
3058                                 ]);
3059                                 // On Diaspora posts the attached pictures are leading
3060                                 if ($item['network'] == Protocol::DIASPORA) {
3061                                         $leading .= $media;
3062                                 } else {
3063                                         $trailing .= $media;
3064                                 }
3065                         }
3066                 }
3067
3068                 if ($shared) {
3069                         $content = str_replace(BBCode::TOP_ANCHOR, '<div class="body-attach">' . $leading . '<div class="clear"></div></div>' . BBCode::TOP_ANCHOR, $content);
3070                         $content = str_replace(BBCode::BOTTOM_ANCHOR, '<div class="body-attach">' . $trailing . '<div class="clear"></div></div>' . BBCode::BOTTOM_ANCHOR, $content);
3071                 } else {
3072                         if ($leading != '') {
3073                                 $content = '<div class="body-attach">' . $leading . '<div class="clear"></div></div>' . $content;
3074                         }
3075
3076                         if ($trailing != '') {
3077                                 $content .= '<div class="body-attach">' . $trailing . '<div class="clear"></div></div>';
3078                         }
3079                 }
3080
3081                 DI::profiler()->stopRecording();
3082                 return $content;
3083         }
3084
3085         /**
3086          * Add link attachment to the content
3087          *
3088          * @param array  $attachments
3089          * @param string $body
3090          * @param string $content
3091          * @param bool   $shared
3092          * @param array  $ignore_links A list of URLs to ignore
3093          * @return string modified content
3094          */
3095         private static function addLinkAttachment(int $uriid, array $attachments, string $body, string $content, bool $shared, array $ignore_links): string
3096         {
3097                 DI::profiler()->startRecording('rendering');
3098                 // Don't show a preview when there is a visual attachment (audio or video)
3099                 $types = array_column($attachments['visual'], 'type');
3100                 $preview = !in_array(Post\Media::IMAGE, $types) && !in_array(Post\Media::VIDEO, $types);
3101
3102                 if (!empty($attachments['link'])) {
3103                         foreach ($attachments['link'] as $link) {
3104                                 $found = false;
3105                                 foreach ($ignore_links as $ignore_link) {
3106                                         if (Strings::compareLink($link['url'], $ignore_link)) {
3107                                                 $found = true;
3108                                         }
3109                                 }
3110                                 // @todo Judge between the links to use the one with most information
3111                                 if (!$found && (empty($attachment) || !empty($link['author-name']) ||
3112                                         (empty($attachment['name']) && !empty($link['name'])) ||
3113                                         (empty($attachment['description']) && !empty($link['description'])) ||
3114                                         (empty($attachment['preview']) && !empty($link['preview'])))) {
3115                                         $attachment = $link;
3116                                 }
3117                         }
3118                 }
3119
3120                 if (!empty($attachment)) {
3121                         $data = [
3122                                 'after' => '',
3123                                 'author_name' => $attachment['author-name'] ?? '',
3124                                 'author_url' =>  $attachment['author-url'] ?? '',
3125                                 'description' => $attachment['description'] ?? '',
3126                                 'image' => '',
3127                                 'preview' => '',
3128                                 'provider_name' => $attachment['publisher-name'] ?? '',
3129                                 'provider_url' => $attachment['publisher-url'] ?? '',
3130                                 'text' => '',
3131                                 'title' => $attachment['name'] ?? '',
3132                                 'type' => 'link',
3133                                 'url' => $attachment['url']];
3134
3135                         if ($preview && !empty($attachment['preview'])) {
3136                                 if ($attachment['preview-width'] >= 500) {
3137                                         $data['image'] = Post\Media::getPreviewUrlForId($attachment['id'], Proxy::SIZE_MEDIUM);
3138                                 } else {
3139                                         $data['preview'] = Post\Media::getPreviewUrlForId($attachment['id'], Proxy::SIZE_MEDIUM);
3140                                 }
3141                         }
3142
3143                         if (!empty($data['description']) && !empty($content)) {
3144                                 similar_text($data['description'], $content, $percent);
3145                         } else {
3146                                 $percent = 0;
3147                         }
3148
3149                         if (!empty($data['description']) && (($data['title'] == $data['description']) || ($percent > 95) || (strpos($content, $data['description']) !== false))) {
3150                                 $data['description'] = '';
3151                         }
3152
3153                         if (($data['author_name'] ?? '') == ($data['provider_name'] ?? '')) {
3154                                 $data['author_name'] = '';
3155                         }
3156
3157                         if (($data['author_url'] ?? '') == ($data['provider_url'] ?? '')) {
3158                                 $data['author_url'] = '';
3159                         }
3160                 } elseif (preg_match("/.*(\[attachment.*?\].*?\[\/attachment\]).*/ism", $body, $match)) {
3161                         $data = BBCode::getAttachmentData($match[1]);
3162                 }
3163                 DI::profiler()->stopRecording();
3164
3165                 if (isset($data['url']) && !in_array($data['url'], $ignore_links)) {
3166                         if (!empty($data['description']) || !empty($data['image']) || !empty($data['preview'])) {
3167                                 $parts = parse_url($data['url']);
3168                                 if (!empty($parts['scheme']) && !empty($parts['host'])) {
3169                                         if (empty($data['provider_name'])) {
3170                                                 $data['provider_name'] = $parts['host'];
3171                                         }
3172                                         if (empty($data['provider_url']) || empty(parse_url($data['provider_url'], PHP_URL_SCHEME))) {
3173                                                 $data['provider_url'] = $parts['scheme'] . '://' . $parts['host'];
3174
3175                                                 if (!empty($parts['port'])) {
3176                                                         $data['provider_url'] .= ':' . $parts['port'];
3177                                                 }
3178                                         }
3179                                 }
3180
3181                                 // @todo Use a template
3182                                 $rendered = BBCode::convertAttachment('', BBCode::INTERNAL, false, $data, $uriid);
3183                         } elseif (!self::containsLink($content, $data['url'], Post\Media::HTML)) {
3184                                 $rendered = Renderer::replaceMacros(Renderer::getMarkupTemplate('content/link.tpl'), [
3185                                         '$url'  => $data['url'],
3186                                         '$title' => $data['title'],
3187                                 ]);
3188                         } else {
3189                                 return $content;
3190                         }
3191
3192                         if ($shared) {
3193                                 return str_replace(BBCode::BOTTOM_ANCHOR, BBCode::BOTTOM_ANCHOR . $rendered, $content);
3194                         } else {
3195                                 return $content . $rendered;
3196                         }
3197                 }
3198                 return $content;
3199         }
3200
3201         /**
3202          * Add non visual attachments to the content
3203          *
3204          * @param array $attachments
3205          * @param array $item
3206          * @param string $content
3207          * @return string modified content
3208          */
3209         private static function addNonVisualAttachments(array $attachments, array $item, string $content): string
3210         {
3211                 DI::profiler()->startRecording('rendering');
3212                 $trailing = '';
3213                 foreach ($attachments['additional'] as $attachment) {
3214                         if (strpos($item['body'], $attachment['url'])) {
3215                                 continue;
3216                         }
3217
3218                         $author = ['uid' => 0, 'id' => $item['author-id'],
3219                                 'network' => $item['author-network'], 'url' => $item['author-link']];
3220                         $the_url = Contact::magicLinkByContact($author, $attachment['url']);
3221
3222                         $title = Strings::escapeHtml(trim(($attachment['description'] ?? '') ?: $attachment['url']));
3223
3224                         if (!empty($attachment['size'])) {
3225                                 $title .= ' ' . $attachment['size'] . ' ' . DI::l10n()->t('bytes');
3226                         }
3227
3228                         /// @todo Use a template
3229                         $icon = '<div class="attachtype icon s22 type-' . $attachment['filetype'] . ' subtype-' . $attachment['subtype'] . '"></div>';
3230                         $trailing .= '<a href="' . strip_tags($the_url) . '" title="' . $title . '" class="attachlink" target="_blank" rel="noopener noreferrer" >' . $icon . '</a>';
3231                 }
3232
3233                 if ($trailing != '') {
3234                         $content .= '<div class="body-attach">' . $trailing . '<div class="clear"></div></div>';
3235                 }
3236
3237                 DI::profiler()->stopRecording();
3238                 return $content;
3239         }
3240
3241         private static function addQuestions(array $item, string $content): string
3242         {
3243                 DI::profiler()->startRecording('rendering');
3244                 if (!empty($item['question-id'])) {
3245                         $question = [
3246                                 'id'       => $item['question-id'],
3247                                 'multiple' => $item['question-multiple'],
3248                                 'voters'   => $item['question-voters'],
3249                                 'endtime'  => $item['question-end-time']
3250                         ];
3251
3252                         $options = Post\QuestionOption::getByURIId($item['uri-id']);
3253                         foreach ($options as $key => $option) {
3254                                 $percent = $question['voters'] ? ($option['replies'] / $question['voters'] * 100) : 0;
3255
3256                                 $options[$key]['percent'] = $percent;
3257
3258                                 if ($question['voters'] > 0) {
3259                                         $options[$key]['vote'] = DI::l10n()->t('%s (%d%s, %d votes)', $option['name'], round($percent, 1), '%', $option['replies']);
3260                                 } else {
3261                                         $options[$key]['vote'] = DI::l10n()->t('%s (%d votes)', $option['name'], $option['replies']);
3262                                 }
3263                         }
3264
3265                         if (!empty($question['voters']) && !empty($question['endtime'])) {
3266                                 $summary = DI::l10n()->t('%d voters. Poll end: %s', $question['voters'], Temporal::getRelativeDate($question['endtime']));
3267                         } elseif (!empty($question['voters'])) {
3268                                 $summary = DI::l10n()->t('%d voters.', $question['voters']);
3269                         } elseif (!empty($question['endtime'])) {
3270                                 $summary = DI::l10n()->t('Poll end: %s', Temporal::getRelativeDate($question['endtime']));
3271                         } else {
3272                                 $summary = '';
3273                         }
3274
3275                         $content .= Renderer::replaceMacros(Renderer::getMarkupTemplate('content/question.tpl'), [
3276                                 '$question' => $question,
3277                                 '$options'  => $options,
3278                                 '$summary'  => $summary,
3279                         ]);
3280         }
3281                 DI::profiler()->stopRecording();
3282                 return $content;
3283         }
3284
3285         /**
3286          * get private link for item
3287          *
3288          * @param array $item
3289          * @return boolean|array False if item has not plink, otherwise array('href'=>plink url, 'title'=>translated title)
3290          * @throws \Exception
3291          */
3292         public static function getPlink(array $item)
3293         {
3294                 if (!empty($item['plink']) && Network::isValidHttpUrl($item['plink'])) {
3295                         $plink = $item['plink'];
3296                 } elseif (!empty($item['uri']) && Network::isValidHttpUrl($item['uri']) && !Network::isLocalLink($item['uri'])) {
3297                         $plink = $item['uri'];
3298                 }
3299
3300                 if (local_user()) {
3301                         $ret = [
3302                                 'href' => "display/" . $item['guid'],
3303                                 'orig' => "display/" . $item['guid'],
3304                                 'title' => DI::l10n()->t('View on separate page'),
3305                                 'orig_title' => DI::l10n()->t('View on separate page'),
3306                         ];
3307
3308                         if (!empty($plink) && ($item['private'] == self::PRIVATE)) {
3309                                 $author = ['uid' => 0, 'id' => $item['author-id'],
3310                                         'network' => $item['author-network'], 'url' => $item['author-link']];
3311                                 $plink = Contact::magicLinkByContact($author, $plink);
3312                         }
3313
3314                         if (!empty($plink)) {
3315                                 $ret['href'] = DI::baseUrl()->remove($plink);
3316                                 $ret['title'] = DI::l10n()->t('Link to source');
3317                         }
3318                 } elseif (!empty($plink) && ($item['private'] != self::PRIVATE)) {
3319                         $ret = [
3320                                 'href' => $plink,
3321                                 'orig' => $plink,
3322                                 'title' => DI::l10n()->t('Link to source'),
3323                                 'orig_title' => DI::l10n()->t('Link to source'),
3324                         ];
3325                 } else {
3326                         $ret = [];
3327                 }
3328
3329                 return $ret;
3330         }
3331
3332         /**
3333          * Does the given uri-id belongs to a post that is sent as starting post to a forum?
3334          *
3335          * @param int $uri_id
3336          *
3337          * @return boolean "true" when it is a forum post
3338          */
3339         public static function isForumPost(int $uri_id): bool
3340         {
3341                 foreach (Tag::getByURIId($uri_id, [Tag::EXCLUSIVE_MENTION]) as $tag) {
3342                         if (DBA::exists('contact', ['uid' => 0, 'nurl' => Strings::normaliseLink($tag['url']), 'contact-type' => Contact::TYPE_COMMUNITY])) {
3343                                 return true;
3344                         }
3345                 }
3346                 return false;
3347         }
3348
3349         /**
3350          * Search item id for given URI or plink
3351          *
3352          * @param string $uri
3353          * @param integer $uid
3354          *
3355          * @return integer item id
3356          */
3357         public static function searchByLink(string $uri, int $uid = 0): int
3358         {
3359                 $ssl_uri = str_replace('http://', 'https://', $uri);
3360                 $uris = [$uri, $ssl_uri, Strings::normaliseLink($uri)];
3361
3362                 $item = Post::selectFirst(['id'], ['uri' => $uris, 'uid' => $uid]);
3363                 if (DBA::isResult($item)) {
3364                         return $item['id'];
3365                 }
3366
3367                 $item = Post::selectFirst(['id'], ['plink' => $uris, 'uid' => $uid]);
3368                 if (DBA::isResult($item)) {
3369                         return $item['id'];
3370                 }
3371
3372                 return 0;
3373         }
3374
3375         /**
3376          * Return the URI for a link to the post
3377          *
3378          * @param string $uri URI or link to post
3379          *
3380          * @return string URI
3381          */
3382         public static function getURIByLink(string $uri): string
3383         {
3384                 $ssl_uri = str_replace('http://', 'https://', $uri);
3385                 $uris = [$uri, $ssl_uri, Strings::normaliseLink($uri)];
3386
3387                 $item = Post::selectFirst(['uri'], ['uri' => $uris]);
3388                 if (DBA::isResult($item)) {
3389                         return $item['uri'];
3390                 }
3391
3392                 $item = Post::selectFirst(['uri'], ['plink' => $uris]);
3393                 if (DBA::isResult($item)) {
3394                         return $item['uri'];
3395                 }
3396
3397                 return '';
3398         }
3399
3400         /**
3401          * Fetches item for given URI or plink
3402          *
3403          * @param string $uri
3404          * @param integer $uid
3405          *
3406          * @return integer item id
3407          */
3408         public static function fetchByLink(string $uri, int $uid = 0): int
3409         {
3410                 Logger::info('Trying to fetch link', ['uid' => $uid, 'uri' => $uri]);
3411                 $item_id = self::searchByLink($uri, $uid);
3412                 if (!empty($item_id)) {
3413                         Logger::info('Link found', ['uid' => $uid, 'uri' => $uri, 'id' => $item_id]);
3414                         return $item_id;
3415                 }
3416
3417                 $hookData = [
3418                         'uri'     => $uri,
3419                         'uid'     => $uid,
3420                         'item_id' => null,
3421                 ];
3422
3423                 Hook::callAll('item_by_link', $hookData);
3424
3425                 if (isset($hookData['item_id'])) {
3426                         return is_numeric($hookData['item_id']) ? $hookData['item_id'] : 0;
3427                 }
3428
3429                 $fetched_uri = ActivityPub\Processor::fetchMissingActivity($uri);
3430
3431                 if ($fetched_uri) {
3432                         $item_id = self::searchByLink($fetched_uri, $uid);
3433                 } else {
3434                         $item_id = Diaspora::fetchByURL($uri);
3435                 }
3436
3437                 if (!empty($item_id)) {
3438                         Logger::info('Link fetched', ['uid' => $uid, 'uri' => $uri, 'id' => $item_id]);
3439                         return $item_id;
3440                 }
3441
3442                 Logger::info('Link not found', ['uid' => $uid, 'uri' => $uri]);
3443                 return 0;
3444         }
3445
3446         /**
3447          * Return share data from an item array (if the item is shared item)
3448          * We are providing the complete Item array, because at some time in the future
3449          * we hopefully will define these values not in the body anymore but in some item fields.
3450          * This function is meant to replace all similar functions in the system.
3451          *
3452          * @param array $item
3453          *
3454          * @return array with share information
3455          */
3456         public static function getShareArray(array $item): array
3457         {
3458                 return BBCode::fetchShareAttributes($item['body']);
3459         }
3460
3461         /**
3462          * Fetch item information for shared items from the original items and adds it.
3463          *
3464          * @param array $item
3465          *
3466          * @return array item array with data from the original item
3467          */
3468         public static function addShareDataFromOriginal(array $item): array
3469         {
3470                 $shared = self::getShareArray($item);
3471                 if (empty($shared)) {
3472                         return $item;
3473                 }
3474
3475                 // Real reshares always have got a GUID.
3476                 if (empty($shared['guid'])) {
3477                         return $item;
3478                 }
3479
3480                 $uid = $item['uid'] ?? 0;
3481
3482                 // first try to fetch the item via the GUID. This will work for all reshares that had been created on this system
3483                 $shared_item = Post::selectFirst(['title', 'body'], ['guid' => $shared['guid'], 'uid' => [0, $uid]]);
3484                 if (!DBA::isResult($shared_item)) {
3485                         if (empty($shared['link'])) {
3486                                 return $item;
3487                         }
3488
3489                         // Otherwhise try to find (and possibly fetch) the item via the link. This should work for Diaspora and ActivityPub posts
3490                         $id = self::fetchByLink($shared['link'] ?? '', $uid);
3491                         if (empty($id)) {
3492                                 Logger::info('Original item not found', ['url' => $shared['link'] ?? '', 'callstack' => System::callstack()]);
3493                                 return $item;
3494                         }
3495
3496                         $shared_item = Post::selectFirst(['title', 'body'], ['id' => $id]);
3497                         if (!DBA::isResult($shared_item)) {
3498                                 return $item;
3499                         }
3500                         Logger::info('Got shared data from url', ['url' => $shared['link'], 'callstack' => System::callstack()]);
3501                 } else {
3502                         Logger::info('Got shared data from guid', ['guid' => $shared['guid'], 'callstack' => System::callstack()]);
3503                 }
3504
3505                 if (!empty($shared_item['title'])) {
3506                         $body = '[h3]' . $shared_item['title'] . "[/h3]\n" . $shared_item['body'];
3507                         unset($shared_item['title']);
3508                 } else {
3509                         $body = $shared_item['body'];
3510                 }
3511
3512                 $item['body'] = preg_replace("/\[share ([^\[\]]*)\].*\[\/share\]/ism", '[share $1]' . str_replace('$', '\$', $body) . '[/share]', $item['body']);
3513                 unset($shared_item['body']);
3514
3515                 return array_merge($item, $shared_item);
3516         }
3517
3518         /**
3519          * Check a prospective item array against user-level permissions
3520          *
3521          * @param array $item Expected keys: uri, gravity, and
3522          *                    author-link if is author-id is set,
3523          *                    owner-link if is owner-id is set,
3524          *                    causer-link if is causer-id is set.
3525          * @param int   $user_id Local user ID
3526          * @return bool
3527          * @throws \Exception
3528          */
3529         protected static function isAllowedByUser(array $item, int $user_id): bool
3530         {
3531                 if (!empty($item['author-id']) && Contact\User::isBlocked($item['author-id'], $user_id)) {
3532                         Logger::notice('Author is blocked by user', ['author-link' => $item['author-link'], 'uid' => $user_id, 'item-uri' => $item['uri']]);
3533                         return false;
3534                 }
3535
3536                 if (!empty($item['owner-id']) && Contact\User::isBlocked($item['owner-id'], $user_id)) {
3537                         Logger::notice('Owner is blocked by user', ['owner-link' => $item['owner-link'], 'uid' => $user_id, 'item-uri' => $item['uri']]);
3538                         return false;
3539                 }
3540
3541                 // The causer is set during a thread completion, for example because of a reshare. It countains the responsible actor.
3542                 if (!empty($item['causer-id']) && Contact\User::isBlocked($item['causer-id'], $user_id)) {
3543                         Logger::notice('Causer is blocked by user', ['causer-link' => $item['causer-link'] ?? $item['causer-id'], 'uid' => $user_id, 'item-uri' => $item['uri']]);
3544                         return false;
3545                 }
3546
3547                 if (!empty($item['causer-id']) && ($item['gravity'] === GRAVITY_PARENT) && Contact\User::isIgnored($item['causer-id'], $user_id)) {
3548                         Logger::notice('Causer is ignored by user', ['causer-link' => $item['causer-link'] ?? $item['causer-id'], 'uid' => $user_id, 'item-uri' => $item['uri']]);
3549                         return false;
3550                 }
3551
3552                 return true;
3553         }
3554
3555         /**
3556          * Improve the data in shared posts
3557          *
3558          * @param array $item
3559          * @return string body
3560          */
3561         public static function improveSharedDataInBody(array $item): string
3562         {
3563                 $shared = BBCode::fetchShareAttributes($item['body']);
3564                 if (empty($shared['link'])) {
3565                         return $item['body'];
3566                 }
3567
3568                 $id = self::fetchByLink($shared['link']);
3569                 Logger::info('Fetched shared post', ['uri-id' => $item['uri-id'], 'id' => $id, 'author' => $shared['profile'], 'url' => $shared['link'], 'guid' => $shared['guid'], 'callstack' => System::callstack()]);
3570                 if (!$id) {
3571                         return $item['body'];
3572                 }
3573
3574                 $shared_item = Post::selectFirst(['author-name', 'author-link', 'author-avatar', 'plink', 'created', 'guid', 'title', 'body'], ['id' => $id]);
3575                 if (!DBA::isResult($shared_item)) {
3576                         return $item['body'];
3577                 }
3578
3579                 $shared_content = BBCode::getShareOpeningTag($shared_item['author-name'], $shared_item['author-link'], $shared_item['author-avatar'], $shared_item['plink'], $shared_item['created'], $shared_item['guid']);
3580
3581                 if (!empty($shared_item['title'])) {
3582                         $shared_content .= '[h3]'.$shared_item['title'].'[/h3]'."\n";
3583                 }
3584
3585                 $shared_content .= $shared_item['body'];
3586
3587                 $item['body'] = preg_replace("/\[share.*?\](.*)\[\/share\]/ism", $shared_content . '[/share]', $item['body']);
3588                 Logger::info('New shared data', ['uri-id' => $item['uri-id'], 'id' => $id, 'shared_item' => $shared_item]);
3589                 return $item['body'];
3590         }
3591 }