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 GuzzleHttp\Psr7\Uri;
  48 use LanguageDetection\Language;
  49
  50 class Item
  51 {
  52         // Posting types, inspired by https://www.w3.org/TR/activitystreams-vocabulary/#object-types
  53         const PT_ARTICLE = 0;
  54         const PT_NOTE = 1;
  55         const PT_PAGE = 2;
  56         const PT_IMAGE = 16;
  57         const PT_AUDIO = 17;
  58         const PT_VIDEO = 18;
  59         const PT_DOCUMENT = 19;
  60         const PT_EVENT = 32;
  61         const PT_POLL = 33;
  62         const PT_PERSONAL_NOTE = 128;
  63
  64         // Posting reasons (Why had a post been stored for a user?)
  65         const PR_NONE = 0;
  66         const PR_TAG = 64;
  67         const PR_TO = 65;
  68         const PR_CC = 66;
  69         const PR_BTO = 67;
  70         const PR_BCC = 68;
  71         const PR_FOLLOWER = 69;
  72         const PR_ANNOUNCEMENT = 70;
  73         const PR_COMMENT = 71;
  74         const PR_STORED = 72;
  75         const PR_GLOBAL = 73;
  76         const PR_RELAY = 74;
  77         const PR_FETCHED = 75;
  78         const PR_COMPLETION = 76;
  79         const PR_DIRECT = 77;
  80         const PR_ACTIVITY = 78;
  81         const PR_DISTRIBUTE = 79;
  82         const PR_PUSHED = 80;
  83         const PR_LOCAL = 81;
  84
  85         // system.accept_only_sharer setting values
  86         const COMPLETION_NONE    = 1;
  87         const COMPLETION_COMMENT = 0;
  88         const COMPLETION_LIKE    = 2;
  89
  90         // Field list that is used to display the items
  91         const DISPLAY_FIELDLIST = [
  92                 'uid', 'id', 'parent', 'guid', 'network', 'gravity',
  93                 'uri-id', 'uri', 'thr-parent-id', 'thr-parent', 'parent-uri-id', 'parent-uri', 'conversation',
  94                 'commented', 'created', 'edited', 'received', 'verb', 'object-type', 'postopts', 'plink',
  95                 'wall', 'private', 'starred', 'origin', 'parent-origin', 'title', 'body', 'language',
  96                 'content-warning', 'location', 'coord', 'app', 'rendered-hash', 'rendered-html', 'object',
  97                 'allow_cid', 'allow_gid', 'deny_cid', 'deny_gid', 'mention', 'global',
  98                 'author-id', 'author-link', 'author-name', 'author-avatar', 'author-network', 'author-updated', 'author-gsid', 'author-addr', 'author-uri-id',
  99                 'owner-id', 'owner-link', 'owner-name', 'owner-avatar', 'owner-network', 'owner-contact-type', 'owner-updated',
 100                 'causer-id', 'causer-link', 'causer-name', 'causer-avatar', 'causer-contact-type', 'causer-network',
 101                 'contact-id', 'contact-uid', 'contact-link', 'contact-name', 'contact-avatar',
 102                 'writable', 'self', 'cid', 'alias',
 103                 'event-created', 'event-edited', 'event-start', 'event-finish',
 104                 'event-summary', 'event-desc', 'event-location', 'event-type',
 105                 'event-nofinish', 'event-ignore', 'event-id',
 106                 'question-id', 'question-multiple', 'question-voters', 'question-end-time',
 107                 'has-categories', 'has-media',
 108                 'delivery_queue_count', 'delivery_queue_done', 'delivery_queue_failed'
 109         ];
 110
 111         // Field list that is used to deliver items via the protocols
 112         const DELIVER_FIELDLIST = ['uid', 'id', 'parent', 'uri-id', 'uri', 'thr-parent', 'parent-uri', 'guid',
 113                         'parent-guid', 'conversation', 'received', 'created', 'edited', 'verb', 'object-type', 'object', 'target',
 114                         'private', 'title', 'body', 'raw-body', 'location', 'coord', 'app',
 115                         'inform', 'deleted', 'extid', 'post-type', 'post-reason', 'gravity',
 116                         'allow_cid', 'allow_gid', 'deny_cid', 'deny_gid',
 117                         'author-id', 'author-link', 'author-name', 'author-avatar', 'owner-id', 'owner-link', 'contact-uid',
 118                         'signed_text', 'network', 'wall', 'contact-id', 'plink', 'origin',
 119                         'thr-parent-id', 'parent-uri-id', 'postopts', 'pubmail',
 120                         'event-created', 'event-edited', 'event-start', 'event-finish',
 121                         'event-summary', 'event-desc', 'event-location', 'event-type',
 122                         'event-nofinish', 'event-ignore', 'event-id'];
 123
 124         // All fields in the item table
 125         const ITEM_FIELDLIST = ['id', 'uid', 'parent', 'uri', 'parent-uri', 'thr-parent',
 126                         'guid', 'uri-id', 'parent-uri-id', 'thr-parent-id', 'conversation', 'vid',
 127                         'contact-id', 'wall', 'gravity', 'extid', 'psid',
 128                         'created', 'edited', 'commented', 'received', 'changed', 'verb',
 129                         'postopts', 'plink', 'resource-id', 'event-id', 'inform',
 130                         'allow_cid', 'allow_gid', 'deny_cid', 'deny_gid', 'post-type', 'post-reason',
 131                         'private', 'pubmail', 'visible', 'starred',
 132                         'unseen', 'deleted', 'origin', 'mention', 'global', 'network',
 133                         'title', 'content-warning', 'body', 'location', 'coord', 'app',
 134                         'rendered-hash', 'rendered-html', 'object-type', 'object', 'target-type', 'target',
 135                         'author-id', 'author-link', 'author-name', 'author-avatar', 'author-network',
 136                         'owner-id', 'owner-link', 'owner-name', 'owner-avatar', 'causer-id'];
 137
 138         // List of all verbs that don't need additional content data.
 139         // Never reorder or remove entries from this list. Just add new ones at the end, if needed.
 140         const ACTIVITIES = [
 141                 Activity::LIKE, Activity::DISLIKE,
 142                 Activity::ATTEND, Activity::ATTENDNO, Activity::ATTENDMAYBE,
 143                 Activity::FOLLOW,
 144                 Activity::ANNOUNCE];
 145
 146         const PUBLIC = 0;
 147         const PRIVATE = 1;
 148         const UNLISTED = 2;
 149
 150         /**
 151          * Update existing item entries
 152          *
 153          * @param array $fields    The fields that are to be changed
 154          * @param array $condition The condition for finding the item entries
 155          *
 156          * In the future we may have to change permissions as well.
 157          * Then we had to add the user id as third parameter.
 158          *
 159          * A return value of "0" doesn't mean an error - but that 0 rows had been changed.
 160          *
 161          * @return integer|boolean number of affected rows - or "false" if there was an error
 162          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 163          */
 164         public static function update(array $fields, array $condition)
 165         {
 166                 if (empty($condition) || empty($fields)) {
 167                         return false;
 168                 }
 169
 170                 if (isset($fields['extid'])) {
 171                         $fields['external-id'] = ItemURI::getIdByURI($fields['extid']);
 172                 }
 173
 174                 if (!empty($fields['verb'])) {
 175                         $fields['vid'] = Verb::getID($fields['verb']);
 176                 }
 177
 178                 if (!empty($fields['edited'])) {
 179                         $previous = Post::selectFirst(['edited'], $condition);
 180                 }
 181
 182                 $rows = Post::update($fields, $condition);
 183                 if (is_bool($rows)) {
 184                         return $rows;
 185                 }
 186
 187                 // We only need to call the line by line update for specific fields
 188                 if (empty($fields['body']) && empty($fields['file']) &&
 189                         empty($fields['attach']) && empty($fields['edited'])) {
 190                         return $rows;
 191                 }
 192
 193                 Logger::info('Updating per single row method', ['fields' => $fields, 'condition' => $condition]);
 194
 195                 $items = Post::select(['id', 'origin', 'uri-id', 'uid', 'author-network'], $condition);
 196
 197                 $notify_items = [];
 198
 199                 while ($item = DBA::fetch($items)) {
 200                         if (!empty($fields['body'])) {
 201                                 Post\Media::insertFromAttachmentData($item['uri-id'], $fields['body']);
 202
 203                                 $content_fields = ['raw-body' => trim($fields['raw-body'] ?? $fields['body'])];
 204
 205                                 // Remove all media attachments from the body and store them in the post-media table
 206                                 // @todo On shared postings (Diaspora style and commented reshare) don't fetch content from the shared part
 207                                 $content_fields['raw-body'] = Post\Media::insertFromBody($item['uri-id'], $content_fields['raw-body']);
 208                                 $content_fields['raw-body'] = self::setHashtags($content_fields['raw-body']);
 209
 210                                 if ($item['author-network'] != Protocol::DFRN) {
 211                                         Post\Media::insertFromRelevantUrl($item['uri-id'], $content_fields['raw-body']);
 212                                 }
 213
 214                                 Post\Content::update($item['uri-id'], $content_fields);
 215                         }
 216
 217                         if (!empty($fields['file'])) {
 218                                 Post\Category::storeTextByURIId($item['uri-id'], $item['uid'], $fields['file']);
 219                         }
 220
 221                         if (!empty($fields['attach'])) {
 222                                 Post\Media::insertFromAttachment($item['uri-id'], $fields['attach']);
 223                         }
 224
 225                         // We only need to notfiy others when it is an original entry from us.
 226                         // Only call the notifier when the item had been edited and records had been changed.
 227                         if ($item['origin'] && !empty($fields['edited']) && ($previous['edited'] != $fields['edited'])) {
 228                                 $notify_items[] = $item['id'];
 229                         }
 230                 }
 231
 232                 DBA::close($items);
 233
 234                 foreach ($notify_items as $notify_item) {
 235                         $post = Post::selectFirst(['uri-id', 'uid'], ['id' => $notify_item]);
 236                         Worker::add(PRIORITY_HIGH, 'Notifier', Delivery::POST, (int)$post['uri-id'], (int)$post['uid']);
 237                 }
 238
 239                 return $rows;
 240         }
 241
 242         /**
 243          * Delete an item and notify others about it - if it was ours
 244          *
 245          * @param array   $condition The condition for finding the item entries
 246          * @param integer $priority  Priority for the notification
 247          * @return void
 248          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 249          */
 250         public static function markForDeletion(array $condition, int $priority = PRIORITY_HIGH)
 251         {
 252                 $items = Post::select(['id'], $condition);
 253                 while ($item = Post::fetch($items)) {
 254                         self::markForDeletionById($item['id'], $priority);
 255                 }
 256                 DBA::close($items);
 257         }
 258
 259         /**
 260          * Delete an item for an user and notify others about it - if it was ours
 261          *
 262          * @param array   $condition The condition for finding the item entries
 263          * @param integer $uid       User who wants to delete this item
 264          * @return void
 265          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 266          */
 267         public static function deleteForUser(array $condition, int $uid)
 268         {
 269                 if ($uid == 0) {
 270                         return;
 271                 }
 272
 273                 $items = Post::select(['id', 'uid', 'uri-id'], $condition);
 274                 while ($item = Post::fetch($items)) {
 275                         if (in_array($item['uid'], [$uid, 0])) {
 276                                 Post\User::update($item['uri-id'], $uid, ['hidden' => true], true);
 277                                 Post\ThreadUser::update($item['uri-id'], $uid, ['hidden' => true], true);
 278                         }
 279
 280                         if ($item['uid'] == $uid) {
 281                                 self::markForDeletionById($item['id'], PRIORITY_HIGH);
 282                         } elseif ($item['uid'] != 0) {
 283                                 Logger::notice('Wrong ownership. Not deleting item', ['id' => $item['id']]);
 284                         }
 285                 }
 286                 DBA::close($items);
 287         }
 288
 289         /**
 290          * Mark an item for deletion, delete related data and notify others about it - if it was ours
 291          *
 292          * @param integer $item_id
 293          * @param integer $priority Priority for the notification
 294          * @return boolean success
 295          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 296          */
 297         public static function markForDeletionById(int $item_id, int $priority = PRIORITY_HIGH): bool
 298         {
 299                 Logger::info('Mark item for deletion by id', ['id' => $item_id, 'callstack' => System::callstack()]);
 300                 // locate item to be deleted
 301                 $fields = ['id', 'uri', 'uri-id', 'uid', 'parent', 'parent-uri-id', 'origin',
 302                         'deleted', 'resource-id', 'event-id',
 303                         'verb', 'object-type', 'object', 'target', 'contact-id', 'psid', 'gravity'];
 304                 $item = Post::selectFirst($fields, ['id' => $item_id]);
 305                 if (!DBA::isResult($item)) {
 306                         Logger::info('Item not found.', ['id' => $item_id]);
 307                         return false;
 308                 }
 309
 310                 if ($item['deleted']) {
 311                         Logger::info('Item has already been marked for deletion.', ['id' => $item_id]);
 312                         return false;
 313                 }
 314
 315                 $parent = Post::selectFirst(['origin'], ['id' => $item['parent']]);
 316                 if (!DBA::isResult($parent)) {
 317                         $parent = ['origin' => false];
 318                 }
 319
 320                 // clean up categories and tags so they don't end up as orphans
 321                 Post\Category::deleteByURIId($item['uri-id'], $item['uid']);
 322
 323                 /*
 324                  * If item is a link to a photo resource, nuke all the associated photos
 325                  * (visitors will not have photo resources)
 326                  * This only applies to photos uploaded from the photos page. Photos inserted into a post do not
 327                  * generate a resource-id and therefore aren't intimately linked to the item.
 328                  */
 329                 /// @TODO: this should first check if photo is used elsewhere
 330                 if (strlen($item['resource-id'])) {
 331                         Photo::delete(['resource-id' => $item['resource-id'], 'uid' => $item['uid']]);
 332                 }
 333
 334                 // If item is a link to an event, delete the event.
 335                 if (intval($item['event-id'])) {
 336                         Event::delete($item['event-id']);
 337                 }
 338
 339                 // If item has attachments, drop them
 340                 $attachments = Post\Media::getByURIId($item['uri-id'], [Post\Media::DOCUMENT]);
 341                 foreach($attachments as $attachment) {
 342                         if (preg_match('|attach/(\d+)|', $attachment['url'], $matches)) {
 343                                 Attach::delete(['id' => $matches[1], 'uid' => $item['uid']]);
 344                         }
 345                 }
 346
 347                 // Set the item to "deleted"
 348                 $item_fields = ['deleted' => true, 'edited' => DateTimeFormat::utcNow(), 'changed' => DateTimeFormat::utcNow()];
 349                 Post::update($item_fields, ['id' => $item['id']]);
 350
 351                 Post\Category::storeTextByURIId($item['uri-id'], $item['uid'], '');
 352
 353                 if (!Post::exists(["`uri-id` = ? AND `uid` != 0 AND NOT `deleted`", $item['uri-id']])) {
 354                         self::markForDeletion(['uri-id' => $item['uri-id'], 'uid' => 0, 'deleted' => false], $priority);
 355                 }
 356
 357                 Post\DeliveryData::delete($item['uri-id']);
 358
 359                 // If it's the parent of a comment thread, kill all the kids
 360                 if ($item['gravity'] == GRAVITY_PARENT) {
 361                         self::markForDeletion(['parent' => $item['parent'], 'deleted' => false], $priority);
 362                 }
 363
 364                 // Is it our comment and/or our thread?
 365                 if (($item['origin'] || $parent['origin']) && ($item['uid'] != 0)) {
 366                         // When we delete the original post we will delete all existing copies on the server as well
 367                         self::markForDeletion(['uri-id' => $item['uri-id'], 'deleted' => false], $priority);
 368
 369                         // send the notification upstream/downstream
 370                         if ($priority) {
 371                                 Worker::add(['priority' => $priority, 'dont_fork' => true], 'Notifier', Delivery::DELETION, (int)$item['uri-id'], (int)$item['uid']);
 372                         }
 373                 } elseif ($item['uid'] != 0) {
 374                         Post\User::update($item['uri-id'], $item['uid'], ['hidden' => true]);
 375                         Post\ThreadUser::update($item['uri-id'], $item['uid'], ['hidden' => true]);
 376                 }
 377
 378                 Logger::info('Item has been marked for deletion.', ['id' => $item_id]);
 379
 380                 return true;
 381         }
 382
 383         /**
 384          * Get guid from given item record
 385          *
 386          * @param array $item Item record
 387          * @param bool Whether to notify (?)
 388          * @return string Guid
 389          */
 390         public static function guid(array $item, bool $notify): string
 391         {
 392                 if (!empty($item['guid'])) {
 393                         return trim($item['guid']);
 394                 }
 395
 396                 if ($notify) {
 397                         // We have to avoid duplicates. So we create the GUID in form of a hash of the plink or uri.
 398                         // We add the hash of our own host because our host is the original creator of the post.
 399                         $prefix_host = DI::baseUrl()->getHostname();
 400                 } else {
 401                         $prefix_host = '';
 402
 403                         // We are only storing the post so we create a GUID from the original hostname.
 404                         if (!empty($item['author-link'])) {
 405                                 $parsed = parse_url($item['author-link']);
 406                                 if (!empty($parsed['host'])) {
 407                                         $prefix_host = $parsed['host'];
 408                                 }
 409                         }
 410
 411                         if (empty($prefix_host) && !empty($item['plink'])) {
 412                                 $parsed = parse_url($item['plink']);
 413                                 if (!empty($parsed['host'])) {
 414                                         $prefix_host = $parsed['host'];
 415                                 }
 416                         }
 417
 418                         if (empty($prefix_host) && !empty($item['uri'])) {
 419                                 $parsed = parse_url($item['uri']);
 420                                 if (!empty($parsed['host'])) {
 421                                         $prefix_host = $parsed['host'];
 422                                 }
 423                         }
 424
 425                         // Is it in the format data@host.tld? - Used for mail contacts
 426                         if (empty($prefix_host) && !empty($item['author-link']) && strstr($item['author-link'], '@')) {
 427                                 $mailparts = explode('@', $item['author-link']);
 428                                 $prefix_host = array_pop($mailparts);
 429                         }
 430                 }
 431
 432                 if (!empty($item['plink'])) {
 433                         $guid = self::guidFromUri($item['plink'], $prefix_host);
 434                 } elseif (!empty($item['uri'])) {
 435                         $guid = self::guidFromUri($item['uri'], $prefix_host);
 436                 } else {
 437                         $guid = System::createUUID(hash('crc32', $prefix_host));
 438                 }
 439
 440                 return $guid;
 441         }
 442
 443         /**
 444          * Returns contact id from given item record
 445          *
 446          * @param array $item Item record
 447          * @return int Contact id
 448          */
 449         private static function contactId(array $item): int
 450         {
 451                 if (!empty($item['contact-id']) && DBA::exists('contact', ['self' => true, 'id' => $item['contact-id']])) {
 452                         return $item['contact-id'];
 453                 } elseif (($item['gravity'] == GRAVITY_PARENT) && !empty($item['uid']) && !empty($item['contact-id']) && Contact::isSharing($item['contact-id'], $item['uid'])) {
 454                         return $item['contact-id'];
 455                 } elseif (!empty($item['uid']) && !Contact::isSharing($item['author-id'], $item['uid'])) {
 456                         return $item['author-id'];
 457                 } elseif (!empty($item['contact-id'])) {
 458                         return $item['contact-id'];
 459                 } else {
 460                         $contact_id = Contact::getIdForURL($item['author-link'], $item['uid']);
 461                         if (!empty($contact_id)) {
 462                                 return $contact_id;
 463                         }
 464                 }
 465                 return $item['author-id'];
 466         }
 467
 468         /**
 469          * Write an item array into a spool file to be inserted later.
 470          * This command is called whenever there are issues storing an item.
 471          *
 472          * @param array $item The item fields that are to be inserted
 473          * @throws \Exception
 474          */
 475         private static function spool(array $item)
 476         {
 477                 // Now we store the data in the spool directory
 478                 // We use "microtime" to keep the arrival order and "mt_rand" to avoid duplicates
 479                 $file = 'item-' . round(microtime(true) * 10000) . '-' . mt_rand() . '.msg';
 480
 481                 $spoolpath = System::getSpoolPath();
 482                 if ($spoolpath != '') {
 483                         $spool = $spoolpath . '/' . $file;
 484
 485                         file_put_contents($spool, json_encode($item));
 486                         Logger::warning("Item wasn't stored - Item was spooled into file", ['file' => $file]);
 487                 }
 488         }
 489
 490         /**
 491          * Check if the item array is a duplicate
 492          *
 493          * @param array $item Item record
 494          * @return boolean is it a duplicate?
 495          */
 496         private static function isDuplicate(array $item): bool
 497         {
 498                 // Checking if there is already an item with the same guid
 499                 $condition = ['guid' => $item['guid'], 'network' => $item['network'], 'uid' => $item['uid']];
 500                 if (Post::exists($condition)) {
 501                         Logger::notice('Found already existing item', $condition);
 502                         return true;
 503                 }
 504
 505                 $condition = ['uri-id' => $item['uri-id'], 'uid' => $item['uid'],
 506                         'network' => [$item['network'], Protocol::DFRN]];
 507                 if (Post::exists($condition)) {
 508                         Logger::notice('duplicated item with the same uri found.', $condition);
 509                         return true;
 510                 }
 511
 512                 // On Friendica and Diaspora the GUID is unique
 513                 if (in_array($item['network'], [Protocol::DFRN, Protocol::DIASPORA])) {
 514                         $condition = ['guid' => $item['guid'], 'uid' => $item['uid']];
 515                         if (Post::exists($condition)) {
 516                                 Logger::notice('duplicated item with the same guid found.', $condition);
 517                                 return true;
 518                         }
 519                 } elseif ($item['network'] == Protocol::OSTATUS) {
 520                         // Check for an existing post with the same content. There seems to be a problem with OStatus.
 521                         $condition = ["`body` = ? AND `network` = ? AND `created` = ? AND `contact-id` = ? AND `uid` = ?",
 522                                         $item['body'], $item['network'], $item['created'], $item['contact-id'], $item['uid']];
 523                         if (Post::exists($condition)) {
 524                                 Logger::notice('duplicated item with the same body found.', $item);
 525                                 return true;
 526                         }
 527                 }
 528
 529                 /*
 530                  * Check for already added items.
 531                  * There is a timing issue here that sometimes creates double postings.
 532                  * An unique index would help - but the limitations of MySQL (maximum size of index values) prevent this.
 533                  */
 534                 if (($item['uid'] == 0) && Post::exists(['uri-id' => $item['uri-id'], 'uid' => 0])) {
 535                         Logger::notice('Global item already stored.', ['uri-id' => $item['uri-id'], 'network' => $item['network']]);
 536                         return true;
 537                 }
 538
 539                 return false;
 540         }
 541
 542         /**
 543          * Check if the item array is valid
 544          *
 545          * @param array $item Item record
 546          * @return boolean item is valid
 547          */
 548         public static function isValid(array $item): bool
 549         {
 550                 // When there is no content then we don't post it
 551                 if (($item['body'] . $item['title'] == '') && (empty($item['uri-id']) || !Post\Media::existsByURIId($item['uri-id']))) {
 552                         Logger::notice('No body, no title.');
 553                         return false;
 554                 }
 555
 556                 if (!empty($item['uid'])) {
 557                         $owner = User::getOwnerDataById($item['uid'], false);
 558                         if (!$owner) {
 559                                 Logger::notice('Missing item user owner data', ['uid' => $item['uid']]);
 560                                 return false;
 561                         }
 562
 563                         if ($owner['account_expired'] || $owner['account_removed']) {
 564                                 Logger::notice('Item user has been deleted/expired/removed', ['uid' => $item['uid'], 'deleted' => $owner['deleted'], 'account_expired' => $owner['account_expired'], 'account_removed' => $owner['account_removed']]);
 565                                 return false;
 566                         }
 567                 }
 568
 569                 if (!empty($item['author-id']) && Contact::isBlocked($item['author-id'])) {
 570                         Logger::notice('Author is blocked node-wide', ['author-link' => $item['author-link'], 'item-uri' => $item['uri']]);
 571                         return false;
 572                 }
 573
 574                 if (!empty($item['author-link']) && Network::isUrlBlocked($item['author-link'])) {
 575                         Logger::notice('Author server is blocked', ['author-link' => $item['author-link'], 'item-uri' => $item['uri']]);
 576                         return false;
 577                 }
 578
 579                 if (!empty($item['owner-id']) && Contact::isBlocked($item['owner-id'])) {
 580                         Logger::notice('Owner is blocked node-wide', ['owner-link' => $item['owner-link'], 'item-uri' => $item['uri']]);
 581                         return false;
 582                 }
 583
 584                 if (!empty($item['owner-link']) && Network::isUrlBlocked($item['owner-link'])) {
 585                         Logger::notice('Owner server is blocked', ['owner-link' => $item['owner-link'], 'item-uri' => $item['uri']]);
 586                         return false;
 587                 }
 588
 589                 if (!empty($item['uid']) && !self::isAllowedByUser($item, $item['uid'])) {
 590                         return false;
 591                 }
 592
 593                 if ($item['verb'] == Activity::FOLLOW) {
 594                         if (!$item['origin'] && ($item['author-id'] == Contact::getPublicIdByUserId($item['uid']))) {
 595                                 // Our own follow request can be relayed to us. We don't store it to avoid notification chaos.
 596                                 Logger::info("Follow: Don't store not origin follow request", ['parent-uri' => $item['parent-uri']]);
 597                                 return false;
 598                         }
 599
 600                         $condition = ['verb' => Activity::FOLLOW, 'uid' => $item['uid'],
 601                                 'parent-uri' => $item['parent-uri'], 'author-id' => $item['author-id']];
 602                         if (Post::exists($condition)) {
 603                                 // It happens that we receive multiple follow requests by the same author - we only store one.
 604                                 Logger::info('Follow: Found existing follow request from author', ['author-id' => $item['author-id'], 'parent-uri' => $item['parent-uri']]);
 605                                 return false;
 606                         }
 607                 }
 608
 609                 return true;
 610         }
 611
 612         /**
 613          * Check if the item array is too old
 614          *
 615          * @param array $item Item record
 616          * @return boolean item is too old
 617          */
 618         public static function isTooOld(array $item): bool
 619         {
 620                 // check for create date and expire time
 621                 $expire_interval = DI::config()->get('system', 'dbclean-expire-days', 0);
 622
 623                 $user = DBA::selectFirst('user', ['expire'], ['uid' => $item['uid']]);
 624                 if (DBA::isResult($user) && ($user['expire'] > 0) && (($user['expire'] < $expire_interval) || ($expire_interval == 0))) {
 625                         $expire_interval = $user['expire'];
 626                 }
 627
 628                 if (($expire_interval > 0) && !empty($item['created'])) {
 629                         $expire_date = time() - ($expire_interval * 86400);
 630                         $created_date = strtotime($item['created']);
 631                         if ($created_date < $expire_date) {
 632                                 Logger::notice('Item created before expiration interval.', [
 633                                         'created' => date('c', $created_date),
 634                                         'expired' => date('c', $expire_date),
 635                                         '$item' => $item
 636                                 ]);
 637                                 return true;
 638                         }
 639                 }
 640
 641                 return false;
 642         }
 643
 644         /**
 645          * Return the id of the given item array if it has been stored before
 646          *
 647          * @param array $item Item record
 648          * @return integer Item id or zero on error
 649          */
 650         private static function getDuplicateID(array $item): int
 651         {
 652                 if (empty($item['network']) || in_array($item['network'], Protocol::FEDERATED)) {
 653                         $condition = ['`uri-id` = ? AND `uid` = ? AND `network` IN (?, ?, ?, ?)',
 654                                 $item['uri-id'],
 655                                 $item['uid'],
 656                                 Protocol::ACTIVITYPUB,
 657                                 Protocol::DIASPORA,
 658                                 Protocol::DFRN,
 659                                 Protocol::OSTATUS
 660                         ];
 661                         $existing = Post::selectFirst(['id', 'network'], $condition);
 662                         if (DBA::isResult($existing)) {
 663                                 // We only log the entries with a different user id than 0. Otherwise we would have too many false positives
 664                                 if ($item['uid'] != 0) {
 665                                         Logger::notice('Item already existed for user', [
 666                                                 'uri-id' => $item['uri-id'],
 667                                                 'uid' => $item['uid'],
 668                                                 'network' => $item['network'],
 669                                                 'existing_id' => $existing['id'],
 670                                                 'existing_network' => $existing['network']
 671                                         ]);
 672                                 }
 673
 674                                 return $existing['id'];
 675                         }
 676                 }
 677                 return 0;
 678         }
 679
 680         /**
 681          * Fetch top-level parent data for the given item array
 682          *
 683          * @param array $item
 684          * @return array item array with parent data
 685          * @throws \Exception
 686          */
 687         private static function getTopLevelParent(array $item): array
 688         {
 689                 $fields = ['uid', 'uri', 'parent-uri', 'id', 'deleted',
 690                         'uri-id', 'parent-uri-id',
 691                         'allow_cid', 'allow_gid', 'deny_cid', 'deny_gid',
 692                         'wall', 'private', 'origin', 'author-id'];
 693                 $condition = ['uri-id' => [$item['thr-parent-id'], $item['parent-uri-id']], 'uid' => $item['uid']];
 694                 $params = ['order' => ['id' => false]];
 695                 $parent = Post::selectFirst($fields, $condition, $params);
 696
 697                 if (!DBA::isResult($parent) && Post::exists(['uri-id' => [$item['thr-parent-id'], $item['parent-uri-id']], 'uid' => 0])) {
 698                         $stored = Item::storeForUserByUriId($item['thr-parent-id'], $item['uid'], ['post-reason' => Item::PR_COMPLETION]);
 699                         if (!$stored && ($item['thr-parent-id'] != $item['parent-uri-id'])) {
 700                                 $stored = Item::storeForUserByUriId($item['parent-uri-id'], $item['uid'], ['post-reason' => Item::PR_COMPLETION]);
 701                         }
 702                         if ($stored) {
 703                                 Logger::info('Stored thread parent item for user', ['uri-id' => $item['thr-parent-id'], 'uid' => $item['uid'], 'stored' => $stored]);
 704                                 $parent = Post::selectFirst($fields, $condition, $params);
 705                         }
 706                 }
 707
 708                 if (!DBA::isResult($parent)) {
 709                         Logger::notice('item parent was not found - ignoring item', ['uri-id' => $item['uri-id'], 'thr-parent-id' => $item['thr-parent-id'], 'uid' => $item['uid'], 'callstack' => System::callstack(20)]);
 710                         return [];
 711                 }
 712
 713                 if ($parent['uri-id'] == $parent['parent-uri-id']) {
 714                         return $parent;
 715                 }
 716
 717                 $condition = ['uri-id' => $parent['parent-uri-id'],
 718                         'parent-uri-id' => $parent['parent-uri-id'],
 719                         'uid' => $parent['uid']];
 720                 $params = ['order' => ['id' => false]];
 721                 $toplevel_parent = Post::selectFirst($fields, $condition, $params);
 722
 723                 if (!DBA::isResult($toplevel_parent) && $item['origin']) {
 724                         $stored = Item::storeForUserByUriId($item['parent-uri-id'], $item['uid'], ['post-reason' => Item::PR_COMPLETION]);
 725                         Logger::info('Stored parent item for user', ['uri-id' => $item['parent-uri-id'], 'uid' => $item['uid'], 'stored' => $stored]);
 726                         $toplevel_parent = Post::selectFirst($fields, $condition, $params);
 727                 }
 728
 729                 if (!DBA::isResult($toplevel_parent)) {
 730                         Logger::notice('item top level parent was not found - ignoring item', ['parent-uri-id' => $parent['parent-uri-id'], 'uid' => $parent['uid']]);
 731                         return [];
 732                 }
 733
 734                 return $toplevel_parent;
 735         }
 736
 737         /**
 738          * Get the gravity for the given item array
 739          *
 740          * @param array $item
 741          * @return integer gravity
 742          */
 743         private static function getGravity(array $item): int
 744         {
 745                 $activity = DI::activity();
 746
 747                 if (isset($item['gravity'])) {
 748                         return intval($item['gravity']);
 749                 } elseif ($item['parent-uri-id'] === $item['uri-id']) {
 750                         return GRAVITY_PARENT;
 751                 } elseif ($activity->match($item['verb'], Activity::POST)) {
 752                         return GRAVITY_COMMENT;
 753                 } elseif ($activity->match($item['verb'], Activity::FOLLOW)) {
 754                         return GRAVITY_ACTIVITY;
 755                 } elseif ($activity->match($item['verb'], Activity::ANNOUNCE)) {
 756                         return GRAVITY_ACTIVITY;
 757                 }
 758
 759                 Logger::info('Unknown gravity for verb', ['verb' => $item['verb']]);
 760                 return GRAVITY_UNKNOWN;   // Should not happen
 761         }
 762
 763         /**
 764          * Inserts item record
 765          *
 766          * @param array $item Item array to be inserted
 767          * @param int   $notify Notification (type?)
 768          * @param bool  $post_local (???)
 769          * @return int Zero means error, otherwise primary key (id) is being returned
 770          */
 771         public static function insert(array $item, int $notify = 0, bool $post_local = true): int
 772         {
 773                 $orig_item = $item;
 774
 775                 $priority = PRIORITY_HIGH;
 776
 777                 // If it is a posting where users should get notifications, then define it as wall posting
 778                 if ($notify) {
 779                         $item['wall'] = 1;
 780                         $item['origin'] = 1;
 781                         $item['network'] = Protocol::DFRN;
 782                         $item['protocol'] = Conversation::PARCEL_DIRECT;
 783                         $item['direction'] = Conversation::PUSH;
 784
 785                         if (is_int($notify) && in_array($notify, PRIORITIES)) {
 786                                 $priority = $notify;
 787                         }
 788                 } else {
 789                         $item['network'] = trim(($item['network'] ?? '') ?: Protocol::PHANTOM);
 790                 }
 791
 792                 $uid = intval($item['uid']);
 793
 794                 $item['guid'] = self::guid($item, $notify);
 795                 $item['uri'] = substr(trim($item['uri'] ?? '') ?: self::newURI($item['guid']), 0, 255);
 796
 797                 // Store URI data
 798                 $item['uri-id'] = ItemURI::insert(['uri' => $item['uri'], 'guid' => $item['guid']]);
 799
 800                 // Backward compatibility: parent-uri used to be the direct parent uri.
 801                 // If it is provided without a thr-parent, it probably is the old behavior.
 802                 if (empty($item['thr-parent']) || empty($item['parent-uri'])) {
 803                         $item['thr-parent'] = trim($item['thr-parent'] ?? $item['parent-uri'] ?? $item['uri']);
 804                         $item['parent-uri'] = $item['thr-parent'];
 805                 }
 806
 807                 $item['thr-parent-id'] = ItemURI::getIdByURI($item['thr-parent']);
 808                 $item['parent-uri-id'] = ItemURI::getIdByURI($item['parent-uri']);
 809
 810                 // Store conversation data
 811                 $source = $item['source'] ?? '';
 812                 unset($item['conversation-uri']);
 813                 unset($item['conversation-href']);
 814                 unset($item['source']);
 815
 816                 /*
 817                  * Do we already have this item?
 818                  * We have to check several networks since Friendica posts could be repeated
 819                  * via OStatus (maybe Diasporsa as well)
 820                  */
 821                 $duplicate = self::getDuplicateID($item);
 822                 if ($duplicate) {
 823                         return $duplicate;
 824                 }
 825
 826                 // Additional duplicate checks
 827                 /// @todo Check why the first duplication check returns the item number and the second a 0
 828                 if (self::isDuplicate($item)) {
 829                         return 0;
 830                 }
 831
 832                 if (!isset($item['post-type'])) {
 833                         $item['post-type'] = empty($item['title']) ? self::PT_NOTE : self::PT_ARTICLE;
 834                 }
 835
 836                 $item['wall']          = intval($item['wall'] ?? 0);
 837                 $item['extid']         = trim($item['extid'] ?? '');
 838                 $item['author-name']   = trim($item['author-name'] ?? '');
 839                 $item['author-link']   = trim($item['author-link'] ?? '');
 840                 $item['author-avatar'] = trim($item['author-avatar'] ?? '');
 841                 $item['owner-name']    = trim($item['owner-name'] ?? '');
 842                 $item['owner-link']    = trim($item['owner-link'] ?? '');
 843                 $item['owner-avatar']  = trim($item['owner-avatar'] ?? '');
 844                 $item['received']      = (isset($item['received'])  ? DateTimeFormat::utc($item['received'])  : DateTimeFormat::utcNow());
 845                 $item['created']       = (isset($item['created'])   ? DateTimeFormat::utc($item['created'])   : $item['received']);
 846                 $item['edited']        = (isset($item['edited'])    ? DateTimeFormat::utc($item['edited'])    : $item['created']);
 847                 $item['changed']       = (isset($item['changed'])   ? DateTimeFormat::utc($item['changed'])   : $item['created']);
 848                 $item['commented']     = (isset($item['commented']) ? DateTimeFormat::utc($item['commented']) : $item['created']);
 849                 $item['title']         = substr(trim($item['title'] ?? ''), 0, 255);
 850                 $item['location']      = trim($item['location'] ?? '');
 851                 $item['coord']         = trim($item['coord'] ?? '');
 852                 $item['visible']       = (isset($item['visible']) ? intval($item['visible']) : 1);
 853                 $item['deleted']       = 0;
 854                 $item['verb']          = trim($item['verb'] ?? '');
 855                 $item['object-type']   = trim($item['object-type'] ?? '');
 856                 $item['object']        = trim($item['object'] ?? '');
 857                 $item['target-type']   = trim($item['target-type'] ?? '');
 858                 $item['target']        = trim($item['target'] ?? '');
 859                 $item['plink']         = substr(trim($item['plink'] ?? ''), 0, 255);
 860                 $item['allow_cid']     = trim($item['allow_cid'] ?? '');
 861                 $item['allow_gid']     = trim($item['allow_gid'] ?? '');
 862                 $item['deny_cid']      = trim($item['deny_cid'] ?? '');
 863                 $item['deny_gid']      = trim($item['deny_gid'] ?? '');
 864                 $item['private']       = intval($item['private'] ?? self::PUBLIC);
 865                 $item['body']          = trim($item['body'] ?? '');
 866                 $item['raw-body']      = trim($item['raw-body'] ?? $item['body']);
 867                 $item['app']           = trim($item['app'] ?? '');
 868                 $item['origin']        = intval($item['origin'] ?? 0);
 869                 $item['postopts']      = trim($item['postopts'] ?? '');
 870                 $item['resource-id']   = trim($item['resource-id'] ?? '');
 871                 $item['event-id']      = intval($item['event-id'] ?? 0);
 872                 $item['inform']        = trim($item['inform'] ?? '');
 873                 $item['file']          = trim($item['file'] ?? '');
 874
 875                 // Communities aren't working with the Diaspora protoccol
 876                 if (($uid != 0) && ($item['network'] == Protocol::DIASPORA)) {
 877                         $user = User::getById($uid, ['account-type']);
 878                         if ($user['account-type'] == Contact::TYPE_COMMUNITY) {
 879                                 Logger::info('Community posts are not supported via Diaspora');
 880                                 return 0;
 881                         }
 882                 }
 883
 884                 // Items cannot be stored before they happen ...
 885                 if ($item['created'] > DateTimeFormat::utcNow()) {
 886                         $item['created'] = DateTimeFormat::utcNow();
 887                 }
 888
 889                 // We haven't invented time travel by now.
 890                 if ($item['edited'] > DateTimeFormat::utcNow()) {
 891                         $item['edited'] = DateTimeFormat::utcNow();
 892                 }
 893
 894                 $item['plink'] = ($item['plink'] ?? '') ?: DI::baseUrl() . '/display/' . urlencode($item['guid']);
 895
 896                 $item['gravity'] = self::getGravity($item);
 897
 898                 $item['language'] = self::getLanguage($item);
 899
 900                 $default = ['url' => $item['author-link'], 'name' => $item['author-name'],
 901                         'photo' => $item['author-avatar'], 'network' => $item['network']];
 902                 $item['author-id'] = ($item['author-id'] ?? 0) ?: Contact::getIdForURL($item['author-link'], 0, null, $default);
 903
 904                 $default = ['url' => $item['owner-link'], 'name' => $item['owner-name'],
 905                         'photo' => $item['owner-avatar'], 'network' => $item['network']];
 906                 $item['owner-id'] = ($item['owner-id'] ?? 0) ?: Contact::getIdForURL($item['owner-link'], 0, null, $default);
 907
 908                 $actor = ($item['gravity'] == GRAVITY_PARENT) ? $item['owner-id'] : $item['author-id'];
 909                 if (!$item['origin'] && ($item['uid'] != 0) && Contact::isSharing($actor, $item['uid'])) {
 910                         $item['post-reason'] = self::PR_FOLLOWER;
 911                 }
 912
 913                 if ($item['origin'] && empty($item['post-reason'])) {
 914                         $item['post-reason'] = self::PR_LOCAL;
 915                 }
 916
 917                 // Ensure that there is an avatar cache
 918                 Contact::checkAvatarCache($item['author-id']);
 919                 Contact::checkAvatarCache($item['owner-id']);
 920
 921                 // The contact-id should be set before "self::insert" was called - but there seems to be issues sometimes
 922                 $item['contact-id'] = self::contactId($item);
 923
 924                 if (!empty($item['direction']) && in_array($item['direction'], [Conversation::PUSH, Conversation::RELAY]) &&
 925                         empty($item['origin']) && self::isTooOld($item)) {
 926                         Logger::info('Item is too old', ['item' => $item]);
 927                         return 0;
 928                 }
 929
 930                 if (!self::isValid($item)) {
 931                         return 0;
 932                 }
 933
 934                 if ($item['gravity'] !== GRAVITY_PARENT) {
 935                         $toplevel_parent = self::getTopLevelParent($item);
 936                         if (empty($toplevel_parent)) {
 937                                 return 0;
 938                         }
 939
 940                         // If the thread originated from this node, we check the permission against the thread starter
 941                         $condition = ['uri-id' => $toplevel_parent['uri-id'], 'wall' => true];
 942                         $localTopLevelParent = Post::selectFirst(['uid'], $condition);
 943                         if (!empty($localTopLevelParent['uid']) && !self::isAllowedByUser($item, $localTopLevelParent['uid'])) {
 944                                 return 0;
 945                         }
 946
 947                         $parent_id             = $toplevel_parent['id'];
 948                         $item['parent-uri']    = $toplevel_parent['uri'];
 949                         $item['parent-uri-id'] = $toplevel_parent['uri-id'];
 950                         $item['deleted']       = $toplevel_parent['deleted'];
 951
 952                         // Reshares have to keep their permissions to allow forums to work
 953                         if (!$item['origin'] || ($item['verb'] != Activity::ANNOUNCE)) {
 954                                 $item['allow_cid']     = $toplevel_parent['allow_cid'];
 955                                 $item['allow_gid']     = $toplevel_parent['allow_gid'];
 956                                 $item['deny_cid']      = $toplevel_parent['deny_cid'];
 957                                 $item['deny_gid']      = $toplevel_parent['deny_gid'];
 958                         }
 959
 960                         $parent_origin         = $toplevel_parent['origin'];
 961
 962                         // Don't federate received participation messages
 963                         if ($item['verb'] != Activity::FOLLOW) {
 964                                 $item['wall'] = $toplevel_parent['wall'];
 965                         } else {
 966                                 $item['wall'] = false;
 967                                 // Participations are technical messages, so they are set to "seen" automatically
 968                                 $item['unseen'] = false;
 969                         }
 970
 971                         /*
 972                          * If the parent is private, force privacy for the entire conversation
 973                          * This differs from the above settings as it subtly allows comments from
 974                          * email correspondents to be private even if the overall thread is not.
 975                          */
 976                         if ($toplevel_parent['private']) {
 977                                 $item['private'] = $toplevel_parent['private'];
 978                         }
 979
 980                         // If its a post that originated here then tag the thread as "mention"
 981                         if ($item['origin'] && $item['uid']) {
 982                                 DBA::update('post-thread-user', ['mention' => true], ['uri-id' => $item['parent-uri-id'], 'uid' => $item['uid']]);
 983                                 Logger::info('tagged thread as mention', ['parent' => $parent_id, 'parent-uri-id' => $item['parent-uri-id'], 'uid' => $item['uid']]);
 984                         }
 985
 986                         // Update the contact relations
 987                         Contact\Relation::store($toplevel_parent['author-id'], $item['author-id'], $item['created']);
 988                 } else {
 989                         $parent_id = 0;
 990                         $parent_origin = $item['origin'];
 991
 992                         if ($item['wall'] && empty($item['conversation'])) {
 993                                 $item['conversation'] = $item['parent-uri'] . '#context';
 994                         }
 995                 }
 996
 997                 $item['parent-uri-id'] = ItemURI::getIdByURI($item['parent-uri']);
 998                 $item['thr-parent-id'] = ItemURI::getIdByURI($item['thr-parent']);
 999
1000                 if (!empty($item['conversation']) && empty($item['conversation-id'])) {
1001                         $item['conversation-id'] = ItemURI::getIdByURI($item['conversation']);
1002                 }
1003
1004                 // Is this item available in the global items (with uid=0)?
1005                 if ($item['uid'] == 0) {
1006                         $item['global'] = true;
1007
1008                         // Set the global flag on all items if this was a global item entry
1009                         Post::update(['global' => true], ['uri-id' => $item['uri-id']]);
1010                 } else {
1011                         $item['global'] = Post::exists(['uid' => 0, 'uri-id' => $item['uri-id']]);
1012                 }
1013
1014                 // ACL settings
1015                 if (!empty($item['allow_cid'] . $item['allow_gid'] . $item['deny_cid'] . $item['deny_gid'])) {
1016                         $item['private'] = self::PRIVATE;
1017                 }
1018
1019                 if ($notify && $post_local) {
1020                         $item['edit'] = false;
1021                         $item['parent'] = $parent_id;
1022
1023                         // Trigger automatic reactions for addons
1024                         if (!isset($item['api_source'])) {
1025                                 $item['api_source'] = true;
1026                         }
1027
1028                         // We have to tell the hooks who we are - this really should be improved
1029                         if (!local_user()) {
1030                                 $_SESSION['authenticated'] = true;
1031                                 $_SESSION['uid'] = $uid;
1032                                 $dummy_session = true;
1033                         } else {
1034                                 $dummy_session = false;
1035                         }
1036
1037                         Hook::callAll('post_local', $item);
1038
1039                         if ($dummy_session) {
1040                                 unset($_SESSION['authenticated']);
1041                                 unset($_SESSION['uid']);
1042                         }
1043                 } elseif (!$notify) {
1044                         Hook::callAll('post_remote', $item);
1045                 }
1046
1047                 if (!empty($item['cancel'])) {
1048                         Logger::notice('post cancelled by addon.');
1049                         return 0;
1050                 }
1051
1052                 if (empty($item['vid']) && !empty($item['verb'])) {
1053                         $item['vid'] = Verb::getID($item['verb']);
1054                 }
1055
1056                 // Creates or assigns the permission set
1057                 $item['psid'] = DI::permissionSet()->selectOrCreate(
1058                         DI::permissionSetFactory()->createFromString(
1059                                 $item['uid'],
1060                                 $item['allow_cid'],
1061                                 $item['allow_gid'],
1062                                 $item['deny_cid'],
1063                                 $item['deny_gid']
1064                 ))->id;
1065
1066                 if (!empty($item['extid'])) {
1067                         $item['external-id'] = ItemURI::getIdByURI($item['extid']);
1068                 }
1069
1070                 if ($item['verb'] == Activity::ANNOUNCE) {
1071                         self::setOwnerforResharedItem($item);
1072                 }
1073
1074                 if (isset($item['attachments'])) {
1075                         foreach ($item['attachments'] as $attachment) {
1076                                 $attachment['uri-id'] = $item['uri-id'];
1077                                 Post\Media::insert($attachment);
1078                         }
1079                         unset($item['attachments']);
1080                 }
1081
1082                 Post\Media::insertFromAttachmentData($item['uri-id'], $item['body']);
1083
1084                 // Remove all media attachments from the body and store them in the post-media table
1085                 $item['raw-body'] = Post\Media::insertFromBody($item['uri-id'], $item['raw-body']);
1086                 $item['raw-body'] = self::setHashtags($item['raw-body']);
1087
1088                 if (!DBA::exists('contact', ['id' => $item['author-id'], 'network' => Protocol::DFRN])) {
1089                         Post\Media::insertFromRelevantUrl($item['uri-id'], $item['raw-body']);
1090                 }
1091
1092                 // Check for hashtags in the body and repair or add hashtag links
1093                 $item['body'] = self::setHashtags($item['body']);
1094
1095                 if (stristr($item['verb'], Activity::POKE)) {
1096                         $notify_type = Delivery::POKE;
1097                 } else {
1098                         $notify_type = Delivery::POST;
1099                 }
1100
1101                 // Filling item related side tables
1102                 if (!empty($item['attach'])) {
1103                         Post\Media::insertFromAttachment($item['uri-id'], $item['attach']);
1104                 }
1105
1106                 if (empty($item['event-id'])) {
1107                         unset($item['event-id']);
1108
1109                         $ev = Event::fromBBCode($item['body']);
1110                         if ((!empty($ev['desc']) || !empty($ev['summary'])) && !empty($ev['start'])) {
1111                                 Logger::info('Event found.');
1112                                 $ev['cid']       = $item['contact-id'];
1113                                 $ev['uid']       = $item['uid'];
1114                                 $ev['uri']       = $item['uri'];
1115                                 $ev['edited']    = $item['edited'];
1116                                 $ev['private']   = $item['private'];
1117                                 $ev['guid']      = $item['guid'];
1118                                 $ev['plink']     = $item['plink'];
1119                                 $ev['network']   = $item['network'];
1120                                 $ev['protocol']  = $item['protocol'] ?? Conversation::PARCEL_UNKNOWN;
1121                                 $ev['direction'] = $item['direction'] ?? Conversation::UNKNOWN;
1122                                 $ev['source']    = $item['source'] ?? '';
1123
1124                                 $event = DBA::selectFirst('event', ['id'], ['uri' => $item['uri'], 'uid' => $item['uid']]);
1125                                 if (DBA::isResult($event)) {
1126                                         $ev['id'] = $event['id'];
1127                                 }
1128
1129                                 $event_id = Event::store($ev);
1130                                 $item = Event::getItemArrayForImportedId($event_id, $item);
1131
1132                                 Logger::info('Event was stored', ['id' => $event_id]);
1133                         }
1134                 }
1135
1136                 if (empty($item['causer-id'])) {
1137                         unset($item['causer-id']);
1138                 }
1139
1140                 if (in_array($item['network'], [Protocol::ACTIVITYPUB, Protocol::DFRN])) {
1141                         $content_warning = BBCode::getAbstract($item['body'], Protocol::ACTIVITYPUB);
1142                         if (!empty($content_warning) && empty($item['content-warning'])) {
1143                                 $item['content-warning'] = BBCode::toPlaintext($content_warning);
1144                         }
1145                 }
1146
1147                 Post::insert($item['uri-id'], $item);
1148
1149                 if ($item['gravity'] == GRAVITY_PARENT) {
1150                         Post\Thread::insert($item['uri-id'], $item);
1151                 }
1152
1153                 if (!in_array($item['verb'], self::ACTIVITIES)) {
1154                         Post\Content::insert($item['uri-id'], $item);
1155                 }
1156
1157                 // Create Diaspora signature
1158                 if ($item['origin'] && empty($item['diaspora_signed_text']) && ($item['gravity'] != GRAVITY_PARENT)) {
1159                         $signed = Diaspora::createCommentSignature($item);
1160                         if (!empty($signed)) {
1161                                 $item['diaspora_signed_text'] = json_encode($signed);
1162                         }
1163                 }
1164
1165                 if (!empty($item['diaspora_signed_text'])) {
1166                         DBA::replace('diaspora-interaction', ['uri-id' => $item['uri-id'], 'interaction' => $item['diaspora_signed_text']]);
1167                 }
1168
1169                 // Attached file links
1170                 if (!empty($item['file'])) {
1171                         Post\Category::storeTextByURIId($item['uri-id'], $item['uid'], $item['file']);
1172                 }
1173
1174                 // Delivery relevant data
1175                 $delivery_data = Post\DeliveryData::extractFields($item);
1176
1177                 if (!empty($item['origin']) || !empty($item['wall']) || !empty($delivery_data['postopts']) || !empty($delivery_data['inform'])) {
1178                         Post\DeliveryData::insert($item['uri-id'], $delivery_data);
1179                 }
1180
1181                 // Store tags from the body if this hadn't been handled previously in the protocol classes
1182                 if (!Tag::existsForPost($item['uri-id'])) {
1183                         Tag::storeFromBody($item['uri-id'], $item['body']);
1184                 }
1185
1186                 $condition = ['uri-id' => $item['uri-id'], 'uid' => $item['uid']];
1187                 if (Post::exists($condition)) {
1188                         Logger::notice('Item is already inserted - aborting', $condition);
1189                         return 0;
1190                 }
1191
1192                 $post_user_id = Post\User::insert($item['uri-id'], $item['uid'], $item);
1193                 if (!$post_user_id) {
1194                         Logger::notice('Post-User is already inserted - aborting', ['uid' => $item['uid'], 'uri-id' => $item['uri-id']]);
1195                         return 0;
1196                 }
1197
1198                 if ($item['gravity'] == GRAVITY_PARENT) {
1199                         $item['post-user-id'] = $post_user_id;
1200                         Post\ThreadUser::insert($item['uri-id'], $item['uid'], $item);
1201                 }
1202
1203                 Logger::notice('created item', ['post-id' => $post_user_id, 'uid' => $item['uid'], 'network' => $item['network'], 'uri-id' => $item['uri-id'], 'guid' => $item['guid']]);
1204
1205                 $posted_item = Post::selectFirst(self::ITEM_FIELDLIST, ['post-user-id' => $post_user_id]);
1206                 if (!DBA::isResult($posted_item)) {
1207                         // On failure store the data into a spool file so that the "SpoolPost" worker can try again later.
1208                         Logger::warning('Could not store item. it will be spooled', ['id' => $post_user_id]);
1209                         self::spool($orig_item);
1210                         return 0;
1211                 }
1212
1213                 // update the commented timestamp on the parent
1214                 if (DI::config()->get('system', 'like_no_comment')) {
1215                         // Update when it is a comment
1216                         $update_commented = in_array($posted_item['gravity'], [GRAVITY_PARENT, GRAVITY_COMMENT]);
1217                 } else {
1218                         // Update when it isn't a follow or tag verb
1219                         $update_commented = !in_array($posted_item['verb'], [Activity::FOLLOW, Activity::TAG]);
1220                 }
1221
1222                 if ($update_commented) {
1223                         $fields = ['commented' => DateTimeFormat::utcNow(), 'changed' => DateTimeFormat::utcNow()];
1224                 } else {
1225                         $fields = ['changed' => DateTimeFormat::utcNow()];
1226                 }
1227
1228                 Post::update($fields, ['uri-id' => $posted_item['parent-uri-id'], 'uid' => $posted_item['uid']]);
1229
1230                 // In that function we check if this is a forum post. Additionally we delete the item under certain circumstances
1231                 if (self::tagDeliver($posted_item['uid'], $post_user_id)) {
1232                         // Get the user information for the logging
1233                         $user = User::getById($uid);
1234
1235                         Logger::notice('Item had been deleted', ['id' => $post_user_id, 'user' => $uid, 'account-type' => $user['account-type']]);
1236                         return 0;
1237                 }
1238
1239                 if ($notify) {
1240                         if (!\Friendica\Content\Feature::isEnabled($posted_item['uid'], 'explicit_mentions') && ($posted_item['gravity'] == GRAVITY_COMMENT)) {
1241                                 Tag::createImplicitMentions($posted_item['uri-id'], $posted_item['thr-parent-id']);
1242                         }
1243                         Hook::callAll('post_local_end', $posted_item);
1244                 } else {
1245                         Hook::callAll('post_remote_end', $posted_item);
1246                 }
1247
1248                 if ($posted_item['gravity'] === GRAVITY_PARENT) {
1249                         self::addShadow($post_user_id);
1250                 } else {
1251                         self::addShadowPost($post_user_id);
1252                 }
1253
1254                 self::updateContact($posted_item);
1255
1256                 Post\UserNotification::setNotification($posted_item['uri-id'], $posted_item['uid']);
1257
1258                 // Distribute items to users who subscribed to their tags
1259                 self::distributeByTags($posted_item);
1260
1261                 // Automatically reshare the item if the "remote_self" option is selected
1262                 self::autoReshare($posted_item);
1263
1264                 $transmit = $notify || ($posted_item['visible'] && ($parent_origin || $posted_item['origin']));
1265
1266                 if ($transmit) {
1267                         // Don't relay participation messages
1268                         if (($posted_item['verb'] == Activity::FOLLOW) &&
1269                                 (!$posted_item['origin'] || ($posted_item['author-id'] != Contact::getPublicIdByUserId($uid)))) {
1270                                 Logger::info('Participation messages will not be relayed', ['item' => $posted_item['id'], 'uri' => $posted_item['uri'], 'verb' => $posted_item['verb']]);
1271                                 $transmit = false;
1272                         }
1273                 }
1274
1275                 if ($transmit) {
1276                         if (!empty($source)) {
1277                                 Post\Activity::insert($item['uri-id'], $source);
1278                         }
1279                         Worker::add(['priority' => $priority, 'dont_fork' => true], 'Notifier', $notify_type, (int)$posted_item['uri-id'], (int)$posted_item['uid']);
1280                 }
1281
1282                 // Fill the cache with the rendered content.
1283                 if (in_array($posted_item['gravity'], [GRAVITY_PARENT, GRAVITY_COMMENT]) && ($posted_item['uid'] == 0)) {
1284                         self::updateDisplayCache($posted_item['uri-id']);
1285                 }
1286
1287                 if ($posted_item['origin'] && ($posted_item['uid'] != 0) && in_array($posted_item['gravity'], [GRAVITY_PARENT, GRAVITY_COMMENT])) {
1288                         DI::cache()->delete(ActivityPub\Transmitter::CACHEKEY_OUTBOX . $posted_item['uid']);
1289                 }
1290
1291                 return $post_user_id;
1292         }
1293
1294         /**
1295          * Update the display cache
1296          *
1297          * @param integer $uri_id
1298          * @return void
1299          */
1300         public static function updateDisplayCache(int $uri_id)
1301         {
1302                 $item = Post::selectFirst(self::DISPLAY_FIELDLIST, ['uri-id' => $uri_id]);
1303                 self::prepareBody($item, false, false, true);
1304         }
1305
1306         /**
1307          * Change the owner of a parent item if it had been shared by a forum
1308          *
1309          * (public) forum posts in the new format consist of the regular post by the author
1310          * followed by an announce message sent from the forum account.
1311          * Changing the owner helps in grouping forum posts.
1312          *
1313          * @param array $item
1314          * @return void
1315          */
1316         private static function setOwnerforResharedItem(array $item)
1317         {
1318                 $parent = Post::selectFirst(['id', 'causer-id', 'owner-id', 'author-id', 'author-link', 'origin', 'post-reason'],
1319                         ['uri-id' => $item['thr-parent-id'], 'uid' => $item['uid']]);
1320                 if (!DBA::isResult($parent)) {
1321                         Logger::error('Parent not found', ['uri-id' => $item['thr-parent-id'], 'uid' => $item['uid']]);
1322                         return;
1323                 }
1324
1325                 $author = Contact::selectFirst(['url', 'contact-type', 'network'], ['id' => $item['author-id']]);
1326                 if (!DBA::isResult($author)) {
1327                         Logger::error('Author not found', ['id' => $item['author-id']]);
1328                         return;
1329                 }
1330
1331                 $self_contact = Contact::selectFirst(['id'], ['uid' => $item['uid'], 'self' => true]);
1332                 $self = !empty($self_contact) ? $self_contact['id'] : 0;
1333
1334                 $cid = Contact::getIdForURL($author['url'], $item['uid']);
1335                 if (empty($cid) || (!Contact::isSharing($cid, $item['uid']) && ($cid != $self))) {
1336                         Logger::info('The resharer is not a following contact: quit', ['resharer' => $author['url'], 'uid' => $item['uid'], 'cid' => $cid]);
1337                         return;
1338                 }
1339
1340                 if ($author['contact-type'] != Contact::TYPE_COMMUNITY) {
1341                         if ($parent['post-reason'] == self::PR_ANNOUNCEMENT) {
1342                                 Logger::info('The parent is already marked as announced: quit', ['causer' => $parent['causer-id'], 'owner' => $parent['owner-id'], 'author' => $parent['author-id'], 'uid' => $item['uid']]);
1343                                 return;
1344                         }
1345
1346                         if (Contact::isSharing($parent['owner-id'], $item['uid'])) {
1347                                 Logger::info('The resharer is no forum: quit', ['resharer' => $item['author-id'], 'owner' => $parent['owner-id'], 'author' => $parent['author-id'], 'uid' => $item['uid']]);
1348                                 return;
1349                         }
1350                 }
1351
1352                 self::update(['post-reason' => self::PR_ANNOUNCEMENT, 'causer-id' => $item['author-id']], ['id' => $parent['id']]);
1353                 Logger::info('Set announcement post-reason', ['uri-id' => $item['uri-id'], 'thr-parent-id' => $item['thr-parent-id'], 'uid' => $item['uid']]);
1354         }
1355
1356         /**
1357          * Distribute the given item to users who subscribed to their tags
1358          *
1359          * @param array $item     Processed item
1360          */
1361         private static function distributeByTags(array $item)
1362         {
1363                 if (($item['uid'] != 0) || ($item['gravity'] != GRAVITY_PARENT) || !in_array($item['network'], Protocol::FEDERATED)) {
1364                         return;
1365                 }
1366
1367                 $uids = Tag::getUIDListByURIId($item['uri-id']);
1368                 foreach ($uids as $uid) {
1369                         $stored = self::storeForUserByUriId($item['uri-id'], $uid, ['post-reason' => self::PR_TAG]);
1370                         Logger::info('Stored item for users', ['uri-id' => $item['uri-id'], 'uid' => $uid, 'stored' => $stored]);
1371                 }
1372         }
1373
1374         /**
1375          * Distributes public items to the receivers
1376          *
1377          * @param integer $itemid      Item ID that should be added
1378          * @param string  $signed_text Original text (for Diaspora signatures), JSON encoded.
1379          * @throws \Exception
1380          */
1381         public static function distribute(int $itemid, string $signed_text = '')
1382         {
1383                 $condition = ["`id` IN (SELECT `parent` FROM `post-user-view` WHERE `id` = ?)", $itemid];
1384                 $parent = Post::selectFirst(['owner-id'], $condition);
1385                 if (!DBA::isResult($parent)) {
1386                         Logger::warning('Item not found', ['condition' => $condition]);
1387                         return;
1388                 }
1389
1390                 // Only distribute public items from native networks
1391                 $condition = ['id' => $itemid, 'uid' => 0,
1392                         'network' => array_merge(Protocol::FEDERATED ,['']),
1393                         'visible' => true, 'deleted' => false, 'private' => [self::PUBLIC, self::UNLISTED]];
1394                 $item = Post::selectFirst(array_merge(self::ITEM_FIELDLIST, ['protocol']), $condition);
1395                 if (!DBA::isResult($item)) {
1396                         Logger::warning('Item not found', ['condition' => $condition]);
1397                         return;
1398                 }
1399
1400                 $origin = $item['origin'];
1401
1402                 $users = [];
1403
1404                 /// @todo add a field "pcid" in the contact table that referrs to the public contact id.
1405                 $owner = DBA::selectFirst('contact', ['url', 'nurl', 'alias'], ['id' => $parent['owner-id']]);
1406                 if (!DBA::isResult($owner)) {
1407                         return;
1408                 }
1409
1410                 $condition = ['nurl' => $owner['nurl'], '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                 $condition = ['alias' => $owner['url'], 'rel' => [Contact::SHARING, Contact::FRIEND]];
1422                 $contacts = DBA::select('contact', ['uid'], $condition);
1423                 while ($contact = DBA::fetch($contacts)) {
1424                         if ($contact['uid'] == 0) {
1425                                 continue;
1426                         }
1427
1428                         $users[$contact['uid']] = $contact['uid'];
1429                 }
1430                 DBA::close($contacts);
1431
1432                 if (!empty($owner['alias'])) {
1433                         $condition = ['nurl' => Strings::normaliseLink($owner['alias']), 'rel' => [Contact::SHARING, Contact::FRIEND]];
1434                         $contacts = DBA::select('contact', ['uid'], $condition);
1435                         while ($contact = DBA::fetch($contacts)) {
1436                                 if ($contact['uid'] == 0) {
1437                                         continue;
1438                                 }
1439
1440                                 $users[$contact['uid']] = $contact['uid'];
1441                         }
1442                         DBA::close($contacts);
1443                 }
1444
1445                 $origin_uid = 0;
1446
1447                 if ($item['uri-id'] != $item['parent-uri-id']) {
1448                         $parents = Post::select(['uid', 'origin'], ["`uri-id` = ? AND `uid` != 0", $item['parent-uri-id']]);
1449                         while ($parent = Post::fetch($parents)) {
1450                                 $users[$parent['uid']] = $parent['uid'];
1451                                 if ($parent['origin'] && !$origin) {
1452                                         $origin_uid = $parent['uid'];
1453                                 }
1454                         }
1455                         DBA::close($parents);
1456                 }
1457
1458                 foreach ($users as $uid) {
1459                         if ($origin_uid == $uid) {
1460                                 $item['diaspora_signed_text'] = $signed_text;
1461                         }
1462                         $item['post-reason'] = self::PR_DISTRIBUTE;
1463                         self::storeForUser($item, $uid);
1464                 }
1465         }
1466
1467         /**
1468          * Store a public item defined by their URI-ID for the given users
1469          *
1470          * @param integer $uri_id     URI-ID of the given item
1471          * @param integer $uid        The user that will receive the item entry
1472          * @param array   $fields     Additional fields to be stored
1473          * @param integer $source_uid User id of the source post
1474          * @return integer stored item id
1475          */
1476         public static function storeForUserByUriId(int $uri_id, int $uid, array $fields = [], int $source_uid = 0): int
1477         {
1478                 if ($uid == $source_uid) {
1479                         Logger::warning('target UID must not be be equal to the source UID', ['uri-id' => $uri_id, 'uid' => $uid]);
1480                         return 0;
1481                 }
1482
1483                 $item = Post::selectFirst(array_merge(self::ITEM_FIELDLIST, ['protocol']), ['uri-id' => $uri_id, 'uid' => $source_uid]);
1484                 if (!DBA::isResult($item)) {
1485                         Logger::warning('Item could not be fetched', ['uri-id' => $uri_id, 'uid' => $source_uid]);
1486                         return 0;
1487                 }
1488
1489                 if (($source_uid == 0) && (($item['private'] == self::PRIVATE) || !in_array($item['network'], Protocol::FEDERATED))) {
1490                         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']]);
1491                         return 0;
1492                 }
1493
1494                 $item['post-reason'] = self::PR_STORED;
1495
1496                 $item = array_merge($item, $fields);
1497
1498                 $is_reshare = ($item['gravity'] == GRAVITY_ACTIVITY) && ($item['verb'] == Activity::ANNOUNCE);
1499
1500                 if ((($item['gravity'] == GRAVITY_PARENT) || $is_reshare) &&
1501                         DI::pConfig()->get($uid, 'system', 'accept_only_sharer') == self::COMPLETION_NONE &&
1502                         !Contact::isSharingByURL($item['author-link'], $uid) &&
1503                         !Contact::isSharingByURL($item['owner-link'], $uid)) {
1504                         Logger::info('Contact is not a follower, thread will not be stored', ['author' => $item['author-link'], 'uid' => $uid]);
1505                         return 0;
1506                 }
1507
1508                 if (($uri_id != $item['thr-parent-id']) && (($item['gravity'] == GRAVITY_COMMENT) || $is_reshare) && !Post::exists(['uri-id' => $item['thr-parent-id'], 'uid' => $uid])) {
1509                         // Fetch the origin user for the post
1510                         $origin_uid = self::GetOriginUidForUriId($item['thr-parent-id'], $uid);
1511                         if (is_null($origin_uid)) {
1512                                 Logger::info('Origin item was not found', ['uid' => $uid, 'uri-id' => $item['thr-parent-id']]);
1513                                 return 0;
1514                         }
1515
1516                         $causer = $item['causer-id'] ?: $item['author-id'];
1517                         $result = self::storeForUserByUriId($item['thr-parent-id'], $uid, ['causer-id' => $causer, 'post-reason' => self::PR_FETCHED], $origin_uid);
1518                         Logger::info('Fetched thread parent', ['uri-id' => $item['thr-parent-id'], 'uid' => $uid, 'causer' => $causer, 'result' => $result]);
1519                 }
1520
1521                 $stored = self::storeForUser($item, $uid);
1522                 Logger::info('Item stored for user', ['uri-id' => $item['uri-id'], 'uid' => $uid, 'source-uid' => $source_uid, 'stored' => $stored]);
1523                 return $stored;
1524         }
1525
1526         /**
1527          * Returns the origin uid of a post if the given user is allowed to see it.
1528          *
1529          * @param int $uriid
1530          * @param int $uid
1531          * @return int
1532          */
1533         private static function GetOriginUidForUriId(int $uriid, int $uid)
1534         {
1535                 if (Post::exists(['uri-id' => $uriid, 'uid' => $uid])) {
1536                         return $uid;
1537                 }
1538
1539                 $post = Post::selectFirst(['uid', 'allow_cid', 'allow_gid', 'deny_cid', 'deny_gid', 'private'], ['uri-id' => $uriid, 'origin' => true]);
1540                 if (!empty($post)) {
1541                         if (in_array($post['private'], [Item::PUBLIC, Item::UNLISTED])) {
1542                                 return $post['uid'];
1543                         }
1544
1545                         $pcid = Contact::getPublicIdByUserId($uid);
1546                         if (empty($pcid)) {
1547                                 return null;
1548                         }
1549
1550                         foreach (Item::enumeratePermissions($post, true) as $receiver) {
1551                                 if ($receiver == $pcid) {
1552                                         return $post['uid'];
1553                                 }
1554                         }
1555
1556                         return null;
1557                 }
1558
1559                 if (Post::exists(['uri-id' => $uriid, 'uid' => 0])) {
1560                         return 0;
1561                 }
1562
1563                 // When the post belongs to a a forum then all forum users are allowed to access it
1564                 foreach (Tag::getByURIId($uriid, [Tag::MENTION, Tag::EXCLUSIVE_MENTION]) as $tag) {
1565                         if (DBA::exists('contact', ['uid' => $uid, 'nurl' => Strings::normaliseLink($tag['url']), 'contact-type' => Contact::TYPE_COMMUNITY])) {
1566                                 $target_uid = User::getIdForURL($tag['url']);
1567                                 if (!empty($target_uid)) {
1568                                         return $target_uid;
1569                                 }
1570                         }
1571                 }
1572
1573                 return null;
1574         }
1575
1576         /**
1577          * Store a public item array for the given users
1578          *
1579          * @param array   $item   The item entry that will be stored
1580          * @param integer $uid    The user that will receive the item entry
1581          * @return integer stored item id
1582          * @throws \Exception
1583          */
1584         private static function storeForUser(array $item, int $uid): int
1585         {
1586                 if (Post::exists(['uri-id' => $item['uri-id'], 'uid' => $uid])) {
1587                         if (!empty($item['event-id'])) {
1588                                 $post = Post::selectFirst(['event-id'], ['uri-id' => $item['uri-id'], 'uid' => $uid]);
1589                                 if (!empty($post['event-id'])) {
1590                                         $event = DBA::selectFirst('event', ['edited', 'start', 'finish', 'summary', 'desc', 'location', 'nofinish', 'adjust'], ['id' => $item['event-id']]);
1591                                         if (!empty($event)) {
1592                                                 // We aren't using "Event::store" here, since we don't want to trigger any further action
1593                                                 $ret = DBA::update('event', $event, ['id' => $post['event-id']]);
1594                                                 Logger::info('Event updated', ['uid' => $uid, 'source-event' => $item['event-id'], 'target-event' => $post['event-id'], 'ret' => $ret]);
1595                                         }
1596                                 }
1597                         }
1598                         Logger::info('Item already exists', ['uri-id' => $item['uri-id'], 'uid' => $uid]);
1599                         return 0;
1600                 }
1601
1602                 // Data from the "post-user" table
1603                 unset($item['id']);
1604                 unset($item['mention']);
1605                 unset($item['starred']);
1606                 unset($item['unseen']);
1607                 unset($item['psid']);
1608                 unset($item['pinned']);
1609                 unset($item['ignored']);
1610                 unset($item['pubmail']);
1611                 unset($item['event-id']);
1612                 unset($item['hidden']);
1613                 unset($item['notification-type']);
1614
1615                 // Data from the "post-delivery-data" table
1616                 unset($item['postopts']);
1617                 unset($item['inform']);
1618
1619                 $item['uid'] = $uid;
1620                 $item['origin'] = 0;
1621                 $item['wall'] = 0;
1622
1623                 if ($item['gravity'] == GRAVITY_PARENT) {
1624                         $contact = Contact::getByURLForUser($item['owner-link'], $uid, false, ['id']);
1625                 } else {
1626                         $contact = Contact::getByURLForUser($item['author-link'], $uid, false, ['id']);
1627                 }
1628
1629                 if (!empty($contact['id'])) {
1630                         $item['contact-id'] = $contact['id'];
1631                 } else {
1632                         // Shouldn't happen at all
1633                         Logger::warning('contact-id could not be fetched', ['uid' => $uid, 'item' => $item]);
1634                         $self = DBA::selectFirst('contact', ['id'], ['self' => true, 'uid' => $uid]);
1635                         if (!DBA::isResult($self)) {
1636                                 // Shouldn't happen even less
1637                                 Logger::warning('self contact could not be fetched', ['uid' => $uid, 'item' => $item]);
1638                                 return 0;
1639                         }
1640                         $item['contact-id'] = $self['id'];
1641                 }
1642
1643                 $notify = false;
1644                 if ($item['gravity'] == GRAVITY_PARENT) {
1645                         $contact = DBA::selectFirst('contact', [], ['id' => $item['contact-id'], 'self' => false]);
1646                         if (DBA::isResult($contact)) {
1647                                 $notify = self::isRemoteSelf($contact, $item);
1648                         }
1649                 }
1650
1651                 $distributed = self::insert($item, $notify);
1652
1653                 if (!$distributed) {
1654                         Logger::info("Distributed item wasn't stored", ['uri-id' => $item['uri-id'], 'user' => $uid]);
1655                 } else {
1656                         Logger::info('Distributed item was stored', ['uri-id' => $item['uri-id'], 'user' => $uid, 'stored' => $distributed]);
1657                 }
1658                 return $distributed;
1659         }
1660
1661         /**
1662          * Add a shadow entry for a given item id that is a thread starter
1663          *
1664          * We store every public item entry additionally with the user id "0".
1665          * This is used for the community page and for the search.
1666          * It is planned that in the future we will store public item entries only once.
1667          *
1668          * @param integer $itemid Item ID that should be added
1669          * @throws \Exception
1670          */
1671         private static function addShadow(int $itemid)
1672         {
1673                 $fields = ['uid', 'private', 'visible', 'deleted', 'network', 'uri-id'];
1674                 $condition = ['id' => $itemid, 'gravity' => GRAVITY_PARENT];
1675                 $item = Post::selectFirst($fields, $condition);
1676
1677                 if (!DBA::isResult($item)) {
1678                         return;
1679                 }
1680
1681                 // is it already a copy?
1682                 if (($itemid == 0) || ($item['uid'] == 0)) {
1683                         return;
1684                 }
1685
1686                 // Is it a visible public post?
1687                 if (!$item["visible"] || $item["deleted"]  || ($item["private"] == self::PRIVATE)) {
1688                         return;
1689                 }
1690
1691                 // is it an entry from a connector? Only add an entry for natively connected networks
1692                 if (!in_array($item["network"], array_merge(Protocol::FEDERATED ,['']))) {
1693                         return;
1694                 }
1695
1696                 if (Post::exists(['uri-id' => $item['uri-id'], 'uid' => 0])) {
1697                         return;
1698                 }
1699
1700                 $item = Post::selectFirst(array_merge(self::ITEM_FIELDLIST, ['protocol']), ['id' => $itemid]);
1701
1702                 if (DBA::isResult($item)) {
1703                         // Preparing public shadow (removing user specific data)
1704                         $item['uid'] = 0;
1705                         unset($item['id']);
1706                         unset($item['parent']);
1707                         unset($item['wall']);
1708                         unset($item['mention']);
1709                         unset($item['origin']);
1710                         unset($item['starred']);
1711                         unset($item['postopts']);
1712                         unset($item['inform']);
1713                         unset($item['post-reason']);
1714                         if ($item['uri-id'] == $item['parent-uri-id']) {
1715                                 $item['contact-id'] = $item['owner-id'];
1716                         } else {
1717                                 $item['contact-id'] = $item['author-id'];
1718                         }
1719
1720                         $public_shadow = self::insert($item);
1721
1722                         Logger::info('Stored public shadow', ['thread' => $itemid, 'id' => $public_shadow]);
1723                 }
1724         }
1725
1726         /**
1727          * Add a shadow entry for a given item id that is a comment
1728          *
1729          * This function does the same like the function above - but for comments
1730          *
1731          * @param integer $itemid Item ID that should be added
1732          * @throws \Exception
1733          */
1734         private static function addShadowPost(int $itemid)
1735         {
1736                 $item = Post::selectFirst(array_merge(self::ITEM_FIELDLIST, ['protocol']), ['id' => $itemid]);
1737                 if (!DBA::isResult($item)) {
1738                         return;
1739                 }
1740
1741                 // Is it a toplevel post?
1742                 if ($item['gravity'] == GRAVITY_PARENT) {
1743                         self::addShadow($itemid);
1744                         return;
1745                 }
1746
1747                 // Is this a shadow entry?
1748                 if ($item['uid'] == 0) {
1749                         return;
1750                 }
1751
1752                 // Is there a shadow parent?
1753                 if (!Post::exists(['uri-id' => $item['parent-uri-id'], 'uid' => 0])) {
1754                         return;
1755                 }
1756
1757                 // Is there already a shadow entry?
1758                 if (Post::exists(['uri-id' => $item['uri-id'], 'uid' => 0])) {
1759                         return;
1760                 }
1761
1762                 // Save "origin" and "parent" state
1763                 $origin = $item['origin'];
1764                 $parent = $item['parent'];
1765
1766                 // Preparing public shadow (removing user specific data)
1767                 $item['uid'] = 0;
1768                 unset($item['id']);
1769                 unset($item['parent']);
1770                 unset($item['wall']);
1771                 unset($item['mention']);
1772                 unset($item['origin']);
1773                 unset($item['starred']);
1774                 unset($item['postopts']);
1775                 unset($item['inform']);
1776                 unset($item['post-reason']);
1777                 $item['contact-id'] = Contact::getIdForURL($item['author-link']);
1778
1779                 $public_shadow = self::insert($item);
1780
1781                 Logger::info('Stored public shadow', ['uri-id' => $item['uri-id'], 'id' => $public_shadow]);
1782
1783                 // If this was a comment to a Diaspora post we don't get our comment back.
1784                 // This means that we have to distribute the comment by ourselves.
1785                 if ($origin && Post::exists(['id' => $parent, 'network' => Protocol::DIASPORA])) {
1786                         self::distribute($public_shadow);
1787                 }
1788         }
1789
1790         /**
1791          * Adds a language specification in a "language" element of given $arr.
1792          * Expects "body" element to exist in $arr.
1793          *
1794          * @param array $item
1795          * @return string detected language
1796          * @throws \Text_LanguageDetect_Exception
1797          */
1798         private static function getLanguage(array $item): string
1799         {
1800                 if (!empty($item['language'])) {
1801                         return $item['language'];
1802                 }
1803
1804                 if (!in_array($item['gravity'], [GRAVITY_PARENT, GRAVITY_COMMENT]) || empty($item['body'])) {
1805                         return '';
1806                 }
1807
1808                 // Convert attachments to links
1809                 $naked_body = BBCode::removeAttachment($item['body']);
1810                 if (empty($naked_body)) {
1811                         return '';
1812                 }
1813
1814                 // Remove links and pictures
1815                 $naked_body = BBCode::removeLinks($naked_body);
1816
1817                 // Convert the title and the body to plain text
1818                 $naked_body = trim($item['title'] . "\n" . BBCode::toPlaintext($naked_body));
1819
1820                 // Remove possibly remaining links
1821                 $naked_body = preg_replace(Strings::autoLinkRegEx(), '', $naked_body);
1822
1823                 if (empty($naked_body)) {
1824                         return '';
1825                 }
1826
1827                 $availableLanguages = DI::l10n()->getAvailableLanguages();
1828                 // See https://github.com/friendica/friendica/issues/10511
1829                 // Persian is manually added to language detection until a persian translation is provided for the interface, at
1830                 // which point it will be automatically available through `getAvailableLanguages()` and this should be removed.
1831                 $availableLanguages['fa'] = 'fa';
1832
1833                 $ld = new Language(array_keys($availableLanguages));
1834                 $languages = $ld->detect($naked_body)->limit(0, 3)->close();
1835                 if (is_array($languages)) {
1836                         return json_encode($languages);
1837                 }
1838
1839                 return '';
1840         }
1841
1842         public static function getLanguageMessage(array $item): string
1843         {
1844                 $iso639 = new \Matriphe\ISO639\ISO639;
1845
1846                 $used_languages = '';
1847                 foreach (json_decode($item['language'], true) as $language => $reliability) {
1848                         $used_languages .= $iso639->languageByCode1($language) . ' (' . $language . "): " . number_format($reliability, 5) . '\n';
1849                 }
1850                 $used_languages = DI::l10n()->t('Detected languages in this post:\n%s', $used_languages);
1851                 return $used_languages;
1852         }
1853
1854         /**
1855          * Creates an unique guid out of a given uri.
1856          * This function is used for messages outside the fediverse (Connector posts, feeds, Mails, ...)
1857          * Posts that are created on this system are using System::createUUID.
1858          * Received ActivityPub posts are using Processor::getGUIDByURL.
1859          *
1860          * @param string      $uri uri of an item entry
1861          * @param string|null $host hostname for the GUID prefix
1862          * @return string Unique guid
1863          */
1864         public static function guidFromUri(string $uri, string $host = null): string
1865         {
1866                 // Our regular guid routine is using this kind of prefix as well
1867                 // We have to avoid that different routines could accidentally create the same value
1868                 $parsed = parse_url($uri);
1869
1870                 // Remove the scheme to make sure that "https" and "http" doesn't make a difference
1871                 unset($parsed['scheme']);
1872
1873                 // Glue it together to be able to make a hash from it
1874                 $host_id = implode('/', $parsed);
1875
1876                 // Use a mixture of several hashes to provide some GUID like experience
1877                 return hash('crc32', $host) . '-'. hash('joaat', $host_id) . '-'. hash('fnv164', $host_id);
1878         }
1879
1880         /**
1881          * generate an unique URI
1882          *
1883          * @param string $guid An existing GUID (Otherwise it will be generated)
1884          *
1885          * @return string
1886          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1887          */
1888         public static function newURI(string $guid = ''): string
1889         {
1890                 if ($guid == '') {
1891                         $guid = System::createUUID();
1892                 }
1893
1894                 return DI::baseUrl()->get() . '/objects/' . $guid;
1895         }
1896
1897         /**
1898          * Set "success_update" and "last-item" to the date of the last time we heard from this contact
1899          *
1900          * This can be used to filter for inactive contacts.
1901          * Only do this for public postings to avoid privacy problems, since poco data is public.
1902          * Don't set this value if it isn't from the owner (could be an author that we don't know)
1903          *
1904          * @param array $arr Contains the just posted item record
1905          * @throws \Exception
1906          */
1907         private static function updateContact(array $arr)
1908         {
1909                 // Unarchive the author
1910                 $contact = DBA::selectFirst('contact', [], ['id' => $arr["author-id"]]);
1911                 if (DBA::isResult($contact)) {
1912                         Contact::unmarkForArchival($contact);
1913                 }
1914
1915                 // Unarchive the contact if it's not our own contact
1916                 $contact = DBA::selectFirst('contact', [], ['id' => $arr["contact-id"], 'self' => false]);
1917                 if (DBA::isResult($contact)) {
1918                         Contact::unmarkForArchival($contact);
1919                 }
1920
1921                 /// @todo On private posts we could obfuscate the date
1922                 $update = ($arr['private'] != self::PRIVATE) || in_array($arr['network'], Protocol::FEDERATED);
1923
1924                 // Is it a forum? Then we don't care about the rules from above
1925                 if (!$update && in_array($arr["network"], [Protocol::ACTIVITYPUB, Protocol::DFRN]) && ($arr["parent-uri-id"] === $arr["uri-id"])) {
1926                         if (DBA::exists('contact', ['id' => $arr['contact-id'], 'forum' => true])) {
1927                                 $update = true;
1928                         }
1929                 }
1930
1931                 if ($update) {
1932                         // The "self" contact id is used (for example in the connectors) when the contact is unknown
1933                         // So we have to ensure to only update the last item when it had been our own post,
1934                         // or it had been done by a "regular" contact.
1935                         if (!empty($arr['wall'])) {
1936                                 $condition = ['id' => $arr['contact-id']];
1937                         } else {
1938                                 $condition = ['id' => $arr['contact-id'], 'self' => false];
1939                         }
1940                         Contact::update(['failed' => false, 'success_update' => $arr['received'], 'last-item' => $arr['received']], $condition);
1941                 }
1942                 // Now do the same for the system wide contacts with uid=0
1943                 if ($arr['private'] != self::PRIVATE) {
1944                         Contact::update(['failed' => false, 'success_update' => $arr['received'], 'last-item' => $arr['received']],
1945                                 ['id' => $arr['owner-id']]);
1946
1947                         if ($arr['owner-id'] != $arr['author-id']) {
1948                                 Contact::update(['failed' => false, 'success_update' => $arr['received'], 'last-item' => $arr['received']],
1949                                         ['id' => $arr['author-id']]);
1950                         }
1951                 }
1952         }
1953
1954         public static function setHashtags(string $body): string
1955         {
1956                 $body = BBCode::performWithEscapedTags($body, ['noparse', 'pre', 'code', 'img'], function ($body) {
1957                         $tags = BBCode::getTags($body);
1958
1959                         // No hashtags?
1960                         if (!count($tags)) {
1961                                 return $body;
1962                         }
1963
1964                         // This sorting is important when there are hashtags that are part of other hashtags
1965                         // Otherwise there could be problems with hashtags like #test and #test2
1966                         // Because of this we are sorting from the longest to the shortest tag.
1967                         usort($tags, function ($a, $b) {
1968                                 return strlen($b) <=> strlen($a);
1969                         });
1970
1971                         $URLSearchString = "^\[\]";
1972
1973                         // All hashtags should point to the home server if "local_tags" is activated
1974                         if (DI::config()->get('system', 'local_tags')) {
1975                                 $body = preg_replace("/#\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",
1976                                         "#[url=" . DI::baseUrl() . "/search?tag=$2]$2[/url]", $body);
1977                         }
1978
1979                         // mask hashtags inside of url, bookmarks and attachments to avoid urls in urls
1980                         $body = preg_replace_callback("/\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",
1981                                 function ($match) {
1982                                         return ("[url=" . str_replace("#", "&num;", $match[1]) . "]" . str_replace("#", "&num;", $match[2]) . "[/url]");
1983                                 }, $body);
1984
1985                         $body = preg_replace_callback("/\[bookmark\=([$URLSearchString]*)\](.*?)\[\/bookmark\]/ism",
1986                                 function ($match) {
1987                                         return ("[bookmark=" . str_replace("#", "&num;", $match[1]) . "]" . str_replace("#", "&num;", $match[2]) . "[/bookmark]");
1988                                 }, $body);
1989
1990                         $body = preg_replace_callback("/\[attachment (.*?)\](.*?)\[\/attachment\]/ism",
1991                                 function ($match) {
1992                                         return ("[attachment " . str_replace("#", "&num;", $match[1]) . "]" . $match[2] . "[/attachment]");
1993                                 }, $body);
1994
1995                         // Repair recursive urls
1996                         $body = preg_replace("/&num;\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",
1997                                 "&num;$2", $body);
1998
1999                         foreach ($tags as $tag) {
2000                                 if ((strpos($tag, '#') !== 0) || strpos($tag, '[url=') || strlen($tag) < 2 || $tag[1] == '#') {
2001                                         continue;
2002                                 }
2003
2004                                 $basetag = str_replace('_', ' ', substr($tag, 1));
2005                                 $newtag = '#[url=' . DI::baseUrl() . '/search?tag=' . $basetag . ']' . $basetag . '[/url]';
2006
2007                                 $body = str_replace($tag, $newtag, $body);
2008                         }
2009
2010                         // Convert back the masked hashtags
2011                         $body = str_replace("&num;", "#", $body);
2012
2013                         return $body;
2014                 });
2015
2016                 return $body;
2017         }
2018
2019         /**
2020          * look for mention tags and setup a second delivery chain for forum/community posts if appropriate
2021          *
2022          * @param int $uid
2023          * @param int $item_id
2024          * @return boolean true if item was deleted, else false
2025          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
2026          * @throws \ImagickException
2027          */
2028         private static function tagDeliver(int $uid, int $item_id): bool
2029         {
2030                 $mention = false;
2031
2032                 $owner = User::getOwnerDataById($uid);
2033                 if (!DBA::isResult($owner)) {
2034                         Logger::warning('User not found, quitting here.', ['uid' => $uid]);
2035                         return false;
2036                 }
2037
2038                 if ($owner['contact-type'] != User::ACCOUNT_TYPE_COMMUNITY) {
2039                         Logger::debug('Owner is no community, quitting here.', ['uid' => $uid, 'id' => $item_id]);
2040                         return false;
2041                 }
2042
2043                 $item = Post::selectFirst(self::ITEM_FIELDLIST, ['id' => $item_id, 'gravity' => [GRAVITY_PARENT, GRAVITY_COMMENT], 'origin' => false]);
2044                 if (!DBA::isResult($item)) {
2045                         Logger::debug('Post is an activity or origin or not found at all, quitting here.', ['id' => $item_id]);
2046                         return false;
2047                 }
2048
2049                 if ($item['gravity'] == GRAVITY_PARENT) {
2050                         $tags = Tag::getByURIId($item['uri-id'], [Tag::MENTION, Tag::EXCLUSIVE_MENTION]);
2051                         foreach ($tags as $tag) {
2052                                 if (Strings::compareLink($owner['url'], $tag['url'])) {
2053                                         $mention = true;
2054                                         Logger::info('Mention found in tag.', ['url' => $tag['url'], 'uri' => $item['uri'], 'uid' => $uid, 'id' => $item_id, 'uri-id' => $item['uri-id'], 'guid' => $item['guid']]);
2055                                 }
2056                         }
2057
2058                         if (!$mention) {
2059                                 Logger::info('Top-level post without mention is deleted.', ['uri' => $item['uri'], $uid, 'id' => $item_id, 'uri-id' => $item['uri-id'], 'guid' => $item['guid']]);
2060                                 Post\User::delete(['uri-id' => $item['uri-id'], 'uid' => $item['uid']]);
2061                                 return true;
2062                         }
2063
2064                         $arr = ['item' => $item, 'user' => $owner];
2065
2066                         Hook::callAll('tagged', $arr);
2067                 } else {
2068                         $tags = Tag::getByURIId($item['parent-uri-id'], [Tag::MENTION, Tag::EXCLUSIVE_MENTION]);
2069                         foreach ($tags as $tag) {
2070                                 if (Strings::compareLink($owner['url'], $tag['url'])) {
2071                                         $mention = true;
2072                                         Logger::info('Mention found in parent tag.', ['url' => $tag['url'], 'uri' => $item['uri'], 'uid' => $uid, 'id' => $item_id, 'uri-id' => $item['uri-id'], 'guid' => $item['guid']]);
2073                                 }
2074                         }
2075
2076                         if (!$mention) {
2077                                 Logger::debug('No mentions found in parent, quitting here.', ['id' => $item_id, 'uri-id' => $item['uri-id'], 'guid' => $item['guid']]);
2078                                 return false;
2079                         }
2080                 }
2081
2082                 Logger::info('Community post will be distributed', ['uri' => $item['uri'], 'uid' => $uid, 'id' => $item_id, 'uri-id' => $item['uri-id'], 'guid' => $item['guid']]);
2083
2084                 if ($owner['page-flags'] == User::PAGE_FLAGS_PRVGROUP) {
2085                         $allow_cid = '';
2086                         $allow_gid = '<' . Group::FOLLOWERS . '>';
2087                         $deny_cid  = '';
2088                         $deny_gid  = '';
2089                         self::performActivity($item['id'], 'announce', $uid, $allow_cid, $allow_gid, $deny_cid, $deny_gid);
2090                 } else {
2091                         self::performActivity($item['id'], 'announce', $uid);
2092                 }
2093
2094                 Logger::info('Community post had been distributed', ['uri' => $item['uri'], 'uid' => $uid, 'id' => $item_id, 'uri-id' => $item['uri-id'], 'guid' => $item['guid']]);
2095                 return false;
2096         }
2097
2098         /**
2099          * Automatically reshare the item if the "remote_self" option is selected
2100          *
2101          * @param array $item
2102          * @return void
2103          */
2104         private static function autoReshare(array $item)
2105         {
2106                 if ($item['gravity'] != GRAVITY_PARENT) {
2107                         return;
2108                 }
2109
2110                 if (!DBA::exists('contact', ['id' => $item['contact-id'], 'remote_self' => Contact::MIRROR_NATIVE_RESHARE])) {
2111                         return;
2112                 }
2113
2114                 if (!in_array($item['network'], [Protocol::ACTIVITYPUB, Protocol::DFRN])) {
2115                         return;
2116                 }
2117
2118                 Logger::info('Automatically reshare item', ['uid' => $item['uid'], 'id' => $item['id'], 'guid' => $item['guid'], 'uri-id' => $item['uri-id']]);
2119
2120                 self::performActivity($item['id'], 'announce', $item['uid']);
2121         }
2122
2123         public static function isRemoteSelf(array $contact, array &$datarray): bool
2124         {
2125                 if (!$contact['remote_self']) {
2126                         return false;
2127                 }
2128
2129                 // Prevent the forwarding of posts that are forwarded
2130                 if (!empty($datarray["extid"]) && ($datarray["extid"] == Protocol::DFRN)) {
2131                         Logger::info('Already forwarded');
2132                         return false;
2133                 }
2134
2135                 // Prevent to forward already forwarded posts
2136                 if ($datarray["app"] == DI::baseUrl()->getHostname()) {
2137                         Logger::info('Already forwarded (second test)');
2138                         return false;
2139                 }
2140
2141                 // Only forward posts
2142                 if ($datarray["verb"] != Activity::POST) {
2143                         Logger::info('No post');
2144                         return false;
2145                 }
2146
2147                 if (($contact['network'] != Protocol::FEED) && ($datarray['private'] == self::PRIVATE)) {
2148                         Logger::info('Not public');
2149                         return false;
2150                 }
2151
2152                 $datarray2 = $datarray;
2153                 Logger::info('remote-self start', ['contact' => $contact['url'], 'remote_self'=> $contact['remote_self'], 'item' => $datarray]);
2154                 if ($contact['remote_self'] == Contact::MIRROR_OWN_POST) {
2155                         $self = DBA::selectFirst('contact', ['id', 'name', 'url', 'thumb'],
2156                                         ['uid' => $contact['uid'], 'self' => true]);
2157                         if (DBA::isResult($self)) {
2158                                 $datarray['contact-id'] = $self["id"];
2159
2160                                 $datarray['owner-name'] = $self["name"];
2161                                 $datarray['owner-link'] = $self["url"];
2162                                 $datarray['owner-avatar'] = $self["thumb"];
2163
2164                                 $datarray['author-name']   = $datarray['owner-name'];
2165                                 $datarray['author-link']   = $datarray['owner-link'];
2166                                 $datarray['author-avatar'] = $datarray['owner-avatar'];
2167
2168                                 unset($datarray['edited']);
2169
2170                                 unset($datarray['network']);
2171                                 unset($datarray['owner-id']);
2172                                 unset($datarray['author-id']);
2173                         }
2174
2175                         if ($contact['network'] != Protocol::FEED) {
2176                                 $old_uri_id = $datarray["uri-id"] ?? 0;
2177                                 $datarray["guid"] = System::createUUID();
2178                                 unset($datarray["plink"]);
2179                                 $datarray["uri"] = self::newURI($datarray["guid"]);
2180                                 $datarray["uri-id"] = ItemURI::getIdByURI($datarray["uri"]);
2181                                 $datarray["extid"] = Protocol::DFRN;
2182                                 $urlpart = parse_url($datarray2['author-link']);
2183                                 $datarray["app"] = $urlpart["host"];
2184                                 if (!empty($old_uri_id)) {
2185                                         Post\Media::copy($old_uri_id, $datarray["uri-id"]);
2186                                 }
2187
2188                                 unset($datarray["parent-uri"]);
2189                                 unset($datarray["thr-parent"]);
2190                         } else {
2191                                 $datarray['private'] = self::PUBLIC;
2192                         }
2193                 }
2194
2195                 if ($contact['network'] != Protocol::FEED) {
2196                         // Store the original post
2197                         $result = self::insert($datarray2);
2198                         Logger::info('remote-self post original item', ['contact' => $contact['url'], 'result'=> $result, 'item' => $datarray2]);
2199                 } else {
2200                         $datarray["app"] = "Feed";
2201                         $result = true;
2202                 }
2203
2204                 return (bool)$result;
2205         }
2206
2207         /**
2208          *
2209          * @param string $s
2210          * @param int    $uid
2211          * @param array  $item
2212          * @param int    $cid
2213          * @return string
2214          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
2215          * @throws \ImagickException
2216          */
2217         public static function fixPrivatePhotos(string $s, int $uid, array $item = null, int $cid = 0): string
2218         {
2219                 if (DI::config()->get('system', 'disable_embedded')) {
2220                         return $s;
2221                 }
2222
2223                 Logger::info('check for photos');
2224                 $site = substr(DI::baseUrl(), strpos(DI::baseUrl(), '://'));
2225
2226                 $orig_body = $s;
2227                 $new_body = '';
2228
2229                 $img_start = strpos($orig_body, '[img');
2230                 $img_st_close = ($img_start !== false ? strpos(substr($orig_body, $img_start), ']') : false);
2231                 $img_len = ($img_start !== false ? strpos(substr($orig_body, $img_start + $img_st_close + 1), '[/img]') : false);
2232
2233                 while (($img_st_close !== false) && ($img_len !== false)) {
2234                         $img_st_close++; // make it point to AFTER the closing bracket
2235                         $image = substr($orig_body, $img_start + $img_st_close, $img_len);
2236
2237                         Logger::info('found photo', ['image' => $image]);
2238
2239                         if (stristr($image, $site . '/photo/')) {
2240                                 // Only embed locally hosted photos
2241                                 $replace = false;
2242                                 $i = basename($image);
2243                                 $i = str_replace(['.jpg', '.png', '.gif'], ['', '', ''], $i);
2244                                 $x = strpos($i, '-');
2245
2246                                 if ($x) {
2247                                         $res = substr($i, $x + 1);
2248                                         $i = substr($i, 0, $x);
2249                                         $photo = Photo::getPhotoForUser($uid, $i, $res);
2250                                         if (DBA::isResult($photo)) {
2251                                                 /*
2252                                                  * Check to see if we should replace this photo link with an embedded image
2253                                                  * 1. No need to do so if the photo is public
2254                                                  * 2. If there's a contact-id provided, see if they're in the access list
2255                                                  *    for the photo. If so, embed it.
2256                                                  * 3. Otherwise, if we have an item, see if the item permissions match the photo
2257                                                  *    permissions, regardless of order but first check to see if they're an exact
2258                                                  *    match to save some processing overhead.
2259                                                  */
2260                                                 if (self::hasPermissions($photo)) {
2261                                                         if ($cid) {
2262                                                                 $recips = self::enumeratePermissions($photo);
2263                                                                 if (in_array($cid, $recips)) {
2264                                                                         $replace = true;
2265                                                                 }
2266                                                         } elseif ($item) {
2267                                                                 if (self::samePermissions($uid, $item, $photo)) {
2268                                                                         $replace = true;
2269                                                                 }
2270                                                         }
2271                                                 }
2272                                                 if ($replace) {
2273                                                         $photo_img = Photo::getImageForPhoto($photo);
2274                                                         // If a custom width and height were specified, apply before embedding
2275                                                         if (preg_match("/\[img\=([0-9]*)x([0-9]*)\]/is", substr($orig_body, $img_start, $img_st_close), $match)) {
2276                                                                 Logger::info('scaling photo');
2277
2278                                                                 $width = intval($match[1]);
2279                                                                 $height = intval($match[2]);
2280
2281                                                                 $photo_img->scaleDown(max($width, $height));
2282                                                         }
2283
2284                                                         $data = $photo_img->asString();
2285                                                         $type = $photo_img->getType();
2286
2287                                                         Logger::info('replacing photo');
2288                                                         $image = 'data:' . $type . ';base64,' . base64_encode($data);
2289                                                         Logger::debug('replaced', ['image' => $image]);
2290                                                 }
2291                                         }
2292                                 }
2293                         }
2294
2295                         $new_body = $new_body . substr($orig_body, 0, $img_start + $img_st_close) . $image . '[/img]';
2296                         $orig_body = substr($orig_body, $img_start + $img_st_close + $img_len + strlen('[/img]'));
2297                         if ($orig_body === false) {
2298                                 $orig_body = '';
2299                         }
2300
2301                         $img_start = strpos($orig_body, '[img');
2302                         $img_st_close = ($img_start !== false ? strpos(substr($orig_body, $img_start), ']') : false);
2303                         $img_len = ($img_start !== false ? strpos(substr($orig_body, $img_start + $img_st_close + 1), '[/img]') : false);
2304                 }
2305
2306                 $new_body = $new_body . $orig_body;
2307
2308                 return $new_body;
2309         }
2310
2311         private static function hasPermissions(array $obj)
2312         {
2313                 return !empty($obj['allow_cid']) || !empty($obj['allow_gid']) ||
2314                         !empty($obj['deny_cid']) || !empty($obj['deny_gid']);
2315         }
2316
2317         // @TODO $uid is unused parameter
2318         private static function samePermissions($uid, array $obj1, array $obj2): bool
2319         {
2320                 // first part is easy. Check that these are exactly the same.
2321                 if (($obj1['allow_cid'] == $obj2['allow_cid'])
2322                         && ($obj1['allow_gid'] == $obj2['allow_gid'])
2323                         && ($obj1['deny_cid'] == $obj2['deny_cid'])
2324                         && ($obj1['deny_gid'] == $obj2['deny_gid'])) {
2325                         return true;
2326                 }
2327
2328                 // This is harder. Parse all the permissions and compare the resulting set.
2329                 $recipients1 = self::enumeratePermissions($obj1);
2330                 $recipients2 = self::enumeratePermissions($obj2);
2331                 sort($recipients1);
2332                 sort($recipients2);
2333
2334                 /// @TODO Comparison of arrays, maybe use array_diff_assoc() here?
2335                 return ($recipients1 == $recipients2);
2336         }
2337
2338         /**
2339          * Returns an array of contact-ids that are allowed to see this object
2340          *
2341          * @param array $obj        Item array with at least uid, allow_cid, allow_gid, deny_cid and deny_gid
2342          * @param bool  $check_dead Prunes unavailable contacts from the result
2343          * @return array
2344          * @throws \Exception
2345          */
2346         public static function enumeratePermissions(array $obj, bool $check_dead = false): array
2347         {
2348                 $aclFormater = DI::aclFormatter();
2349
2350                 $allow_people = $aclFormater->expand($obj['allow_cid']);
2351                 $allow_groups = Group::expand($obj['uid'], $aclFormater->expand($obj['allow_gid']), $check_dead);
2352                 $deny_people  = $aclFormater->expand($obj['deny_cid']);
2353                 $deny_groups  = Group::expand($obj['uid'], $aclFormater->expand($obj['deny_gid']), $check_dead);
2354                 $recipients   = array_unique(array_merge($allow_people, $allow_groups));
2355                 $deny         = array_unique(array_merge($deny_people, $deny_groups));
2356                 $recipients   = array_diff($recipients, $deny);
2357                 return $recipients;
2358         }
2359
2360         public static function expire(int $uid, int $days, string $network = "", bool $force = false)
2361         {
2362                 if (!$uid || ($days < 1)) {
2363                         return;
2364                 }
2365
2366                 $condition = ["`uid` = ? AND NOT `deleted` AND `gravity` = ?",
2367                         $uid, GRAVITY_PARENT];
2368
2369                 /*
2370                  * $expire_network_only = save your own wall posts
2371                  * and just expire conversations started by others
2372                  */
2373                 $expire_network_only = DI::pConfig()->get($uid, 'expire', 'network_only', false);
2374
2375                 if ($expire_network_only) {
2376                         $condition[0] .= " AND NOT `wall`";
2377                 }
2378
2379                 if ($network != "") {
2380                         $condition[0] .= " AND `network` = ?";
2381                         $condition[] = $network;
2382                 }
2383
2384                 $condition[0] .= " AND `received` < ?";
2385                 $condition[] = DateTimeFormat::utc('now - ' . $days . ' day');
2386
2387                 $items = Post::select(['resource-id', 'starred', 'id', 'post-type', 'uid', 'uri-id'], $condition);
2388
2389                 if (!DBA::isResult($items)) {
2390                         return;
2391                 }
2392
2393                 $expire_items = DI::pConfig()->get($uid, 'expire', 'items', true);
2394
2395                 // Forcing expiring of items - but not notes and marked items
2396                 if ($force) {
2397                         $expire_items = true;
2398                 }
2399
2400                 $expire_notes = DI::pConfig()->get($uid, 'expire', 'notes', true);
2401                 $expire_starred = DI::pConfig()->get($uid, 'expire', 'starred', true);
2402                 $expire_photos = DI::pConfig()->get($uid, 'expire', 'photos', false);
2403
2404                 $expired = 0;
2405
2406                 $priority = DI::config()->get('system', 'expire-notify-priority');
2407
2408                 while ($item = Post::fetch($items)) {
2409                         // don't expire filed items
2410                         if (DBA::exists('post-category', ['uri-id' => $item['uri-id'], 'uid' => $item['uid'], 'type' => Post\Category::FILE])) {
2411                                 continue;
2412                         }
2413
2414                         // Only expire posts, not photos and photo comments
2415
2416                         if (!$expire_photos && !empty($item['resource-id'])) {
2417                                 continue;
2418                         } elseif (!$expire_starred && intval($item['starred'])) {
2419                                 continue;
2420                         } elseif (!$expire_notes && ($item['post-type'] == self::PT_PERSONAL_NOTE)) {
2421                                 continue;
2422                         } elseif (!$expire_items && ($item['post-type'] != self::PT_PERSONAL_NOTE)) {
2423                                 continue;
2424                         }
2425
2426                         self::markForDeletionById($item['id'], $priority);
2427
2428                         ++$expired;
2429                 }
2430                 DBA::close($items);
2431                 Logger::notice('User ' . $uid . ": expired $expired items; expire items: $expire_items, expire notes: $expire_notes, expire starred: $expire_starred, expire photos: $expire_photos");
2432         }
2433
2434         public static function firstPostDate(int $uid, bool $wall = false)
2435         {
2436                 $user = User::getById($uid, ['register_date']);
2437                 if (empty($user)) {
2438                         return false;
2439                 }
2440
2441                 $condition = ["`uid` = ? AND `wall` = ? AND NOT `deleted` AND `visible` AND `received` >= ?",
2442                         $uid, $wall, $user['register_date']];
2443                 $params = ['order' => ['received' => false]];
2444                 $thread = Post::selectFirstThread(['received'], $condition, $params);
2445                 if (DBA::isResult($thread)) {
2446                         $postdate = substr(DateTimeFormat::local($thread['received']), 0, 10);
2447                         return $postdate;
2448                 }
2449                 return false;
2450         }
2451
2452         /**
2453          * add/remove activity to an item
2454          *
2455          * Toggle activities as like,dislike,attend of an item
2456          *
2457          * @param int    $item_id
2458          * @param string $verb
2459          *            Activity verb. One of
2460          *            like, unlike, dislike, undislike, attendyes, unattendyes,
2461          *            attendno, unattendno, attendmaybe, unattendmaybe,
2462          *            announce, unannouce
2463          * @param int    $uid
2464          * @param string $allow_cid
2465          * @param string $allow_gid
2466          * @param string $deny_cid
2467          * @param string $deny_gid
2468          * @return bool
2469          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
2470          * @throws \ImagickException
2471          * @hook  'post_local_end'
2472          *            array $arr
2473          *            'post_id' => ID of posted item
2474          */
2475         public static function performActivity(int $item_id, string $verb, int $uid, string $allow_cid = null, string $allow_gid = null, string $deny_cid = null, string $deny_gid = null): bool
2476         {
2477                 if (empty($uid)) {
2478                         return false;
2479                 }
2480
2481                 Logger::notice('Start create activity', ['verb' => $verb, 'item' => $item_id, 'user' => $uid]);
2482
2483                 $item = Post::selectFirst(self::ITEM_FIELDLIST, ['id' => $item_id]);
2484                 if (!DBA::isResult($item)) {
2485                         Logger::notice('like: unknown item', ['id' => $item_id]);
2486                         return false;
2487                 }
2488
2489                 $uri_id = $item['uri-id'];
2490
2491                 if (!in_array($item['uid'], [0, $uid])) {
2492                         return false;
2493                 }
2494
2495                 if (!Post::exists(['uri-id' => $item['parent-uri-id'], 'uid' => $uid])) {
2496                         $stored = self::storeForUserByUriId($item['parent-uri-id'], $uid, ['post-reason' => Item::PR_ACTIVITY]);
2497                         if (($item['parent-uri-id'] == $item['uri-id']) && !empty($stored)) {
2498                                 $item = Post::selectFirst(self::ITEM_FIELDLIST, ['id' => $stored]);
2499                                 if (!DBA::isResult($item)) {
2500                                         Logger::info('Could not fetch just created item - should not happen', ['stored' => $stored, 'uid' => $uid, 'uri-id' => $uri_id]);
2501                                         return false;
2502                                 }
2503                         }
2504                 }
2505
2506                 // Retrieves the local post owner
2507                 $owner = User::getOwnerDataById($uid);
2508                 if (empty($owner)) {
2509                         Logger::info('Empty owner for user', ['uid' => $uid]);
2510                         return false;
2511                 }
2512
2513                 // Retrieve the current logged in user's public contact
2514                 $author_id = Contact::getIdForURL($owner['url']);
2515                 if (empty($author_id)) {
2516                         Logger::info('Empty public contact');
2517                         return false;
2518                 }
2519
2520                 $activity = null;
2521                 switch ($verb) {
2522                         case 'like':
2523                         case 'unlike':
2524                                 $activity = Activity::LIKE;
2525                                 break;
2526                         case 'dislike':
2527                         case 'undislike':
2528                                 $activity = Activity::DISLIKE;
2529                                 break;
2530                         case 'attendyes':
2531                         case 'unattendyes':
2532                                 $activity = Activity::ATTEND;
2533                                 break;
2534                         case 'attendno':
2535                         case 'unattendno':
2536                                 $activity = Activity::ATTENDNO;
2537                                 break;
2538                         case 'attendmaybe':
2539                         case 'unattendmaybe':
2540                                 $activity = Activity::ATTENDMAYBE;
2541                                 break;
2542                         case 'follow':
2543                         case 'unfollow':
2544                                 $activity = Activity::FOLLOW;
2545                                 break;
2546                         case 'announce':
2547                         case 'unannounce':
2548                                 $activity = Activity::ANNOUNCE;
2549                                 break;
2550                         default:
2551                                 Logger::notice('unknown verb', ['verb' => $verb, 'item' => $item_id]);
2552                                 return false;
2553                 }
2554
2555                 $mode = Strings::startsWith($verb, 'un') ? 'delete' : 'create';
2556
2557                 // Enable activity toggling instead of on/off
2558                 $event_verb_flag = $activity === Activity::ATTEND || $activity === Activity::ATTENDNO || $activity === Activity::ATTENDMAYBE;
2559
2560                 // Look for an existing verb row
2561                 // Event participation activities are mutually exclusive, only one of them can exist at all times.
2562                 if ($event_verb_flag) {
2563                         $verbs = [Activity::ATTEND, Activity::ATTENDNO, Activity::ATTENDMAYBE];
2564
2565                         // Translate to the index based activity index
2566                         $vids = [];
2567                         foreach ($verbs as $verb) {
2568                                 $vids[] = Verb::getID($verb);
2569                         }
2570                 } else {
2571                         $vids = Verb::getID($activity);
2572                 }
2573
2574                 $condition = ['vid' => $vids, 'deleted' => false, 'gravity' => GRAVITY_ACTIVITY,
2575                         'author-id' => $author_id, 'uid' => $item['uid'], 'thr-parent-id' => $uri_id];
2576                 $like_item = Post::selectFirst(['id', 'guid', 'verb'], $condition);
2577
2578                 if (DBA::isResult($like_item)) {
2579                         /**
2580                          * Truth table for existing activities
2581                          *
2582                          * |          Inputs            ||      Outputs      |
2583                          * |----------------------------||-------------------|
2584                          * |  Mode  | Event | Same verb || Delete? | Return? |
2585                          * |--------|-------|-----------||---------|---------|
2586                          * | create |  Yes  |    Yes    ||   No    |   Yes   |
2587                          * | create |  Yes  |    No     ||   Yes   |   No    |
2588                          * | create |  No   |    Yes    ||   No    |   Yes   |
2589                          * | create |  No   |    No     ||        N/A†       |
2590                          * | delete |  Yes  |    Yes    ||   Yes   |   N/A‡  |
2591                          * | delete |  Yes  |    No     ||   No    |   N/A‡  |
2592                          * | delete |  No   |    Yes    ||   Yes   |   N/A‡  |
2593                          * | delete |  No   |    No     ||        N/A†       |
2594                          * |--------|-------|-----------||---------|---------|
2595                          * |   A    |   B   |     C     || A xor C | !B or C |
2596                          *
2597                          * † Can't happen: It's impossible to find an existing non-event activity without
2598                          *                 the same verb because we are only looking for this single verb.
2599                          *
2600                          * ‡ The "mode = delete" is returning early whether an existing activity was found or not.
2601                          */
2602                         if ($mode == 'create' xor $like_item['verb'] == $activity) {
2603                                 self::markForDeletionById($like_item['id']);
2604                         }
2605
2606                         if (!$event_verb_flag || $like_item['verb'] == $activity) {
2607                                 return true;
2608                         }
2609                 }
2610
2611                 // No need to go further if we aren't creating anything
2612                 if ($mode == 'delete') {
2613                         return true;
2614                 }
2615
2616                 $objtype = $item['resource-id'] ? Activity\ObjectType::IMAGE : Activity\ObjectType::NOTE;
2617
2618                 $new_item = [
2619                         'guid'          => System::createUUID(),
2620                         'uri'           => self::newURI(),
2621                         'uid'           => $item['uid'],
2622                         'contact-id'    => $owner['id'],
2623                         'wall'          => $item['wall'],
2624                         'origin'        => 1,
2625                         'network'       => Protocol::DFRN,
2626                         'protocol'      => Conversation::PARCEL_DIRECT,
2627                         'direction'     => Conversation::PUSH,
2628                         'gravity'       => GRAVITY_ACTIVITY,
2629                         'parent'        => $item['id'],
2630                         'thr-parent'    => $item['uri'],
2631                         'owner-id'      => $author_id,
2632                         'author-id'     => $author_id,
2633                         'body'          => $activity,
2634                         'verb'          => $activity,
2635                         'object-type'   => $objtype,
2636                         'allow_cid'     => $allow_cid ?? $item['allow_cid'],
2637                         'allow_gid'     => $allow_gid ?? $item['allow_gid'],
2638                         'deny_cid'      => $deny_cid ?? $item['deny_cid'],
2639                         'deny_gid'      => $deny_gid ?? $item['deny_gid'],
2640                         'visible'       => 1,
2641                         'unseen'        => 1,
2642                 ];
2643
2644                 $signed = Diaspora::createLikeSignature($uid, $new_item);
2645                 if (!empty($signed)) {
2646                         $new_item['diaspora_signed_text'] = json_encode($signed);
2647                 }
2648
2649                 $new_item_id = self::insert($new_item);
2650
2651                 // If the parent item isn't visible then set it to visible
2652                 if (!$item['visible']) {
2653                         self::update(['visible' => true], ['id' => $item['id']]);
2654                 }
2655
2656                 $new_item['id'] = $new_item_id;
2657
2658                 Hook::callAll('post_local_end', $new_item);
2659
2660                 return true;
2661         }
2662
2663         /**
2664          * Fetch the SQL condition for the given user id
2665          *
2666          * @param integer $owner_id User ID for which the permissions should be fetched
2667          * @return array condition
2668          */
2669         public static function getPermissionsConditionArrayByUserId(int $owner_id): array
2670         {
2671                 $local_user = local_user();
2672                 $remote_user = Session::getRemoteContactID($owner_id);
2673
2674                 // default permissions - anonymous user
2675                 $condition = ["`private` != ?", self::PRIVATE];
2676
2677                 if ($local_user && ($local_user == $owner_id)) {
2678                         // Profile owner - everything is visible
2679                         $condition = [];
2680                 } elseif ($remote_user) {
2681                          // Authenticated visitor - fetch the matching permissionsets
2682                         $permissionSets = DI::permissionSet()->selectByContactId($remote_user, $owner_id);
2683                         if (!empty($set)) {
2684                                 $condition = ["(`private` != ? OR (`private` = ? AND `wall`
2685                                         AND `psid` IN (" . implode(', ', array_fill(0, count($set), '?')) . ")))",
2686                                         self::PRIVATE, self::PRIVATE];
2687                                 $condition = array_merge($condition, $permissionSets->column('id'));
2688                         }
2689                 }
2690
2691                 return $condition;
2692         }
2693
2694         /**
2695          * Get a permission SQL string for the given user
2696          *
2697          * @param int $owner_id
2698          * @param string $table
2699          * @return string
2700          */
2701         public static function getPermissionsSQLByUserId(int $owner_id, string $table = ''): string
2702         {
2703                 $local_user = local_user();
2704                 $remote_user = Session::getRemoteContactID($owner_id);
2705
2706                 if (!empty($table)) {
2707                         $table = DBA::quoteIdentifier($table) . '.';
2708                 }
2709
2710                 /*
2711                  * Construct permissions
2712                  *
2713                  * default permissions - anonymous user
2714                  */
2715                 $sql = sprintf(" AND " . $table . "`private` != %d", self::PRIVATE);
2716
2717                 // Profile owner - everything is visible
2718                 if ($local_user && ($local_user == $owner_id)) {
2719                         $sql = '';
2720                 } elseif ($remote_user) {
2721                         /*
2722                          * Authenticated visitor. Unless pre-verified,
2723                          * check that the contact belongs to this $owner_id
2724                          * and load the groups the visitor belongs to.
2725                          * If pre-verified, the caller is expected to have already
2726                          * done this and passed the groups into this function.
2727                          */
2728                         $permissionSets = DI::permissionSet()->selectByContactId($remote_user, $owner_id);
2729
2730                         if (!empty($set)) {
2731                                 $sql_set = sprintf(" OR (" . $table . "`private` = %d AND " . $table . "`wall` AND " . $table . "`psid` IN (", self::PRIVATE) . implode(',', $permissionSets->column('id')) . "))";
2732                         } else {
2733                                 $sql_set = '';
2734                         }
2735
2736                         $sql = sprintf(" AND (" . $table . "`private` != %d", self::PRIVATE) . $sql_set . ")";
2737                 }
2738
2739                 return $sql;
2740         }
2741
2742         /**
2743          * get translated item type
2744          *
2745          * @param array                $item
2746          * @param \Friendica\Core\L10n $l10n
2747          * @return string
2748          */
2749         public static function postType(array $item, \Friendica\Core\L10n $l10n): string
2750         {
2751                 if (!empty($item['event-id'])) {
2752                         return $l10n->t('event');
2753                 } elseif (!empty($item['resource-id'])) {
2754                         return $l10n->t('photo');
2755                 } elseif ($item['gravity'] == GRAVITY_ACTIVITY) {
2756                         return $l10n->t('activity');
2757                 } elseif ($item['gravity'] == GRAVITY_COMMENT) {
2758                         return $l10n->t('comment');
2759                 }
2760
2761                 return $l10n->t('post');
2762         }
2763
2764         /**
2765          * Sets the "rendered-html" field of the provided item
2766          *
2767          * Body is preserved to avoid side-effects as we modify it just-in-time for spoilers and private image links
2768          *
2769          * @param array $item
2770          *
2771          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
2772          * @todo Remove reference, simply return "rendered-html" and "rendered-hash"
2773          */
2774         private static function putInCache(&$item)
2775         {
2776                 // Save original body to prevent addons to modify it
2777                 $body = $item['body'];
2778
2779                 $rendered_hash = $item['rendered-hash'] ?? '';
2780                 $rendered_html = $item['rendered-html'] ?? '';
2781
2782                 if ($rendered_hash == ''
2783                         || $rendered_html == ''
2784                         || $rendered_hash != hash('md5', BBCode::VERSION . '::' . $body)
2785                         || DI::config()->get('system', 'ignore_cache')
2786                 ) {
2787                         $item['rendered-html'] = BBCode::convertForUriId($item['uri-id'], $item['body']);
2788                         $item['rendered-hash'] = hash('md5', BBCode::VERSION . '::' . $body);
2789
2790                         $hook_data = ['item' => $item, 'rendered-html' => $item['rendered-html'], 'rendered-hash' => $item['rendered-hash']];
2791                         Hook::callAll('put_item_in_cache', $hook_data);
2792                         $item['rendered-html'] = $hook_data['rendered-html'];
2793                         $item['rendered-hash'] = $hook_data['rendered-hash'];
2794                         unset($hook_data);
2795
2796                         // Update if the generated values differ from the existing ones
2797                         if ((($rendered_hash != $item['rendered-hash']) || ($rendered_html != $item['rendered-html'])) && !empty($item['id'])) {
2798                                 self::update(
2799                                         [
2800                                                 'rendered-html' => $item['rendered-html'],
2801                                                 'rendered-hash' => $item['rendered-hash']
2802                                         ],
2803                                         ['id' => $item['id']]
2804                                 );
2805                         }
2806                 }
2807
2808                 $item['body'] = $body;
2809         }
2810
2811         /**
2812          * Given an item array, convert the body element from bbcode to html and add smilie icons.
2813          * If attach is true, also add icons for item attachments.
2814          *
2815          * @param array   $item Record from item table
2816          * @param boolean $attach If true, add icons for item attachments as well
2817          * @param boolean $is_preview Whether this is a preview
2818          * @param boolean $only_cache Whether only cached HTML should be updated
2819          * @return string item body html
2820          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
2821          * @throws \ImagickException
2822          * @hook  prepare_body_init item array before any work
2823          * @hook  prepare_body_content_filter ('item'=>item array, 'filter_reasons'=>string array) before first bbcode to html
2824          * @hook  prepare_body ('item'=>item array, 'html'=>body string, 'is_preview'=>boolean, 'filter_reasons'=>string array) after first bbcode to html
2825          * @hook  prepare_body_final ('item'=>item array, 'html'=>body string) after attach icons and blockquote special case handling (spoiler, author)
2826          */
2827         public static function prepareBody(array &$item, bool $attach = false, bool $is_preview = false, bool $only_cache = false): string
2828         {
2829                 $a = DI::app();
2830                 Hook::callAll('prepare_body_init', $item);
2831
2832                 // In order to provide theme developers more possibilities, event items
2833                 // are treated differently.
2834                 if ($item['object-type'] === Activity\ObjectType::EVENT && isset($item['event-id'])) {
2835                         $ev = Event::getItemHTML($item);
2836                         return $ev;
2837                 }
2838
2839                 $tags = Tag::populateFromItem($item);
2840
2841                 $item['tags'] = $tags['tags'];
2842                 $item['hashtags'] = $tags['hashtags'];
2843                 $item['mentions'] = $tags['mentions'];
2844
2845                 $body = $item['body'] ?? '';
2846                 $shared = BBCode::fetchShareAttributes($body);
2847                 if (!empty($shared['guid'])) {
2848                         $shared_item = Post::selectFirst(['uri-id', 'plink', 'has-media'], ['guid' => $shared['guid']]);
2849                         $shared_uri_id = $shared_item['uri-id'] ?? 0;
2850                         $shared_links = [strtolower($shared_item['plink'] ?? '')];
2851                         $shared_attachments = Post\Media::splitAttachments($shared_uri_id, $shared['guid'], [], $shared_item['has-media'] ?? false);
2852                         $shared_links = array_merge($shared_links, array_column($shared_attachments['visual'], 'url'));
2853                         $shared_links = array_merge($shared_links, array_column($shared_attachments['link'], 'url'));
2854                         $shared_links = array_merge($shared_links, array_column($shared_attachments['additional'], 'url'));
2855                         $item['body'] = self::replaceVisualAttachments($shared_attachments, $item['body']);
2856                 } else {
2857                         $shared_uri_id = 0;
2858                         $shared_links = [];
2859                 }
2860
2861                 $attachments = Post\Media::splitAttachments($item['uri-id'], $item['guid'] ?? '', $shared_links, $item['has-media'] ?? false);
2862                 $item['body'] = self::replaceVisualAttachments($attachments, $item['body'] ?? '');
2863
2864                 $item['body'] = preg_replace("/\s*\[attachment .*?\].*?\[\/attachment\]\s*/ism", "\n", $item['body']);
2865                 self::putInCache($item);
2866                 $item['body'] = $body;
2867                 $s = $item["rendered-html"];
2868
2869                 if ($only_cache) {
2870                         return '';
2871                 }
2872
2873                 // Compile eventual content filter reasons
2874                 $filter_reasons = [];
2875                 if (!$is_preview && public_contact() != $item['author-id']) {
2876                         if (!empty($item['content-warning']) && (!local_user() || !DI::pConfig()->get(local_user(), 'system', 'disable_cw', false))) {
2877                                 $filter_reasons[] = DI::l10n()->t('Content warning: %s', $item['content-warning']);
2878                         }
2879
2880                         $item['attachments'] = $attachments;
2881
2882                         $hook_data = [
2883                                 'item' => $item,
2884                                 'filter_reasons' => $filter_reasons
2885                         ];
2886                         Hook::callAll('prepare_body_content_filter', $hook_data);
2887                         $filter_reasons = $hook_data['filter_reasons'];
2888                         unset($hook_data);
2889                 }
2890
2891                 $hook_data = [
2892                         'item' => $item,
2893                         'html' => $s,
2894                         'preview' => $is_preview,
2895                         'filter_reasons' => $filter_reasons
2896                 ];
2897                 Hook::callAll('prepare_body', $hook_data);
2898                 $s = $hook_data['html'];
2899                 unset($hook_data);
2900
2901                 if (!$attach) {
2902                         // Replace the blockquotes with quotes that are used in mails.
2903                         $mailquote = '<blockquote type="cite" class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">';
2904                         $s = str_replace(['<blockquote>', '<blockquote class="spoiler">', '<blockquote class="author">'], [$mailquote, $mailquote, $mailquote], $s);
2905                         return $s;
2906                 }
2907
2908                 if (!empty($shared_attachments)) {
2909                         $s = self::addVisualAttachments($shared_attachments, $item, $s, true);
2910                         $s = self::addLinkAttachment($shared_uri_id ?: $item['uri-id'], $shared_attachments, $body, $s, true, []);
2911                         $s = self::addNonVisualAttachments($shared_attachments, $item, $s, true);
2912                         $body = preg_replace("/\s*\[share .*?\].*?\[\/share\]\s*/ism", '', $body);
2913                 }
2914
2915                 $s = self::addVisualAttachments($attachments, $item, $s, false);
2916                 $s = self::addLinkAttachment($item['uri-id'], $attachments, $body, $s, false, $shared_links);
2917                 $s = self::addNonVisualAttachments($attachments, $item, $s, false);
2918                 $s = self::addQuestions($item, $s);
2919
2920                 // Map.
2921                 if (strpos($s, '<div class="map">') !== false && !empty($item['coord'])) {
2922                         $x = Map::byCoordinates(trim($item['coord']));
2923                         if ($x) {
2924                                 $s = preg_replace('/\<div class\=\"map\"\>/', '$0' . $x, $s);
2925                         }
2926                 }
2927
2928                 // Replace friendica image url size with theme preference.
2929                 if (!empty($a->getThemeInfoValue('item_image_size'))) {
2930                         $ps = $a->getThemeInfoValue('item_image_size');
2931                         $s = preg_replace('|(<img[^>]+src="[^"]+/photo/[0-9a-f]+)-[0-9]|', "$1-" . $ps, $s);
2932                 }
2933
2934                 $s = HTML::applyContentFilter($s, $filter_reasons);
2935
2936                 $hook_data = ['item' => $item, 'html' => $s];
2937                 Hook::callAll('prepare_body_final', $hook_data);
2938
2939                 return $hook_data['html'];
2940         }
2941
2942         /**
2943          * Check if the body contains a link
2944          *
2945          * @param string $body
2946          * @param string $url
2947          * @param int    $type
2948          * @return bool
2949          */
2950         public static function containsLink(string $body, string $url, int $type = 0): bool
2951         {
2952                 // Make sure that for example site parameters aren't used when testing if the link is contained in the body
2953                 $urlparts = parse_url($url);
2954                 if (!empty($urlparts)) {
2955                         unset($urlparts['query']);
2956                         unset($urlparts['fragment']);
2957                         $url = (string)Uri::fromParts($urlparts);
2958                 } else {
2959                         return false;
2960                 }
2961
2962                 // Remove media links to only search in embedded content
2963                 // @todo Check images for image link, audio for audio links, ...
2964                 if (in_array($type, [Post\Media::AUDIO, Post\Media::VIDEO, Post\Media::IMAGE])) {
2965                         $body = preg_replace("/\[url=[^\[\]]*\](.*)\[\/url\]/Usi", ' $1 ', $body);
2966                 }
2967
2968                 if (strpos($body, $url)) {
2969                         return true;
2970                 }
2971                 foreach ([0, 1, 2] as $size) {
2972                         if (preg_match('#/photo/.*-' . $size . '\.#ism', $url) &&
2973                                 strpos(preg_replace('#(/photo/.*)-[012]\.#ism', '$1-' . $size . '.', $body), $url)) {
2974                                 return true;
2975                         }
2976                 }
2977                 return false;
2978         }
2979
2980         /**
2981          * Replace visual attachments in the body
2982          *
2983          * @param array $attachments
2984          * @param string $body
2985          * @return string modified body
2986          */
2987         private static function replaceVisualAttachments(array $attachments, string $body): string
2988         {
2989                 DI::profiler()->startRecording('rendering');
2990
2991                 foreach ($attachments['visual'] as $attachment) {
2992                         if (!empty($attachment['preview'])) {
2993                                 $proxy   = Post\Media::getPreviewUrlForId($attachment['id'], Proxy::SIZE_LARGE);
2994                                 $search  = ['[img=' . $attachment['preview'] . ']', ']' . $attachment['preview'] . '[/img]'];
2995                                 $replace = ['[img=' . $proxy . ']', ']' . $proxy . '[/img]'];
2996
2997                                 $body = str_replace($search, $replace, $body);
2998                         } elseif ($attachment['filetype'] == 'image') {
2999                                 $proxy   = Post\Media::getUrlForId($attachment['id']);
3000                                 $search  = ['[img=' . $attachment['url'] . ']', ']' . $attachment['url'] . '[/img]'];
3001                                 $replace = ['[img=' . $proxy . ']', ']' . $proxy . '[/img]'];
3002
3003                                 $body = str_replace($search, $replace, $body);
3004                         }
3005                 }
3006                 DI::profiler()->stopRecording();
3007                 return $body;
3008         }
3009
3010         /**
3011          * Add visual attachments to the content
3012          *
3013          * @param array $attachments
3014          * @param array $item
3015          * @param string $content
3016          * @return string modified content
3017          */
3018         private static function addVisualAttachments(array $attachments, array $item, string $content, bool $shared): string
3019         {
3020                 DI::profiler()->startRecording('rendering');
3021                 $leading = '';
3022                 $trailing = '';
3023
3024                 // @todo In the future we should make a single for the template engine with all media in it. This allows more flexibilty.
3025                 foreach ($attachments['visual'] as $attachment) {
3026                         if (self::containsLink($item['body'], $attachment['preview'] ?? $attachment['url'], $attachment['type'])) {
3027                                 continue;
3028                         }
3029
3030                         if (!empty($attachment['preview'])) {
3031                                 $preview_url = Post\Media::getPreviewUrlForId($attachment['id'], Proxy::SIZE_LARGE);
3032                         } else {
3033                                 $preview_url = '';
3034                         }
3035
3036                         if (($attachment['filetype'] == 'video')) {
3037                                 /// @todo Move the template to /content as well
3038                                 $media = Renderer::replaceMacros(Renderer::getMarkupTemplate('video_top.tpl'), [
3039                                         '$video' => [
3040                                                 'id'      => $attachment['id'],
3041                                                 'src'     => $attachment['url'],
3042                                                 'name'    => $attachment['name'] ?: $attachment['url'],
3043                                                 'preview' => $preview_url,
3044                                                 'mime'    => $attachment['mimetype'],
3045                                         ],
3046                                 ]);
3047                                 if (($item['post-type'] ?? null) == Item::PT_VIDEO) {
3048                                         $leading .= $media;
3049                                 } else {
3050                                         $trailing .= $media;
3051                                 }
3052                         } elseif ($attachment['filetype'] == 'audio') {
3053                                 $media = Renderer::replaceMacros(Renderer::getMarkupTemplate('content/audio.tpl'), [
3054                                         '$audio' => [
3055                                                 'id'     => $attachment['id'],
3056                                                 'src'    => $attachment['url'],
3057                                                 'name'   => $attachment['name'] ?: $attachment['url'],
3058                                                 'mime'   => $attachment['mimetype'],
3059                                         ],
3060                                 ]);
3061                                 if (($item['post-type'] ?? null) == Item::PT_AUDIO) {
3062                                         $leading .= $media;
3063                                 } else {
3064                                         $trailing .= $media;
3065                                 }
3066                         } elseif ($attachment['filetype'] == 'image') {
3067                                 $media = Renderer::replaceMacros(Renderer::getMarkupTemplate('content/image.tpl'), [
3068                                         '$image' => [
3069                                                 'src'        => Post\Media::getUrlForId($attachment['id']),
3070                                                 'preview'    => Post\Media::getPreviewUrlForId($attachment['id'], ($attachment['width'] > $attachment['height']) ? Proxy::SIZE_MEDIUM : Proxy::SIZE_LARGE),
3071                                                 'attachment' => $attachment,
3072                                         ],
3073                                 ]);
3074                                 // On Diaspora posts the attached pictures are leading
3075                                 if ($item['network'] == Protocol::DIASPORA) {
3076                                         $leading .= $media;
3077                                 } else {
3078                                         $trailing .= $media;
3079                                 }
3080                         }
3081                 }
3082
3083                 if ($shared) {
3084                         $content = str_replace(BBCode::TOP_ANCHOR, '<div class="body-attach">' . $leading . '<div class="clear"></div></div>' . BBCode::TOP_ANCHOR, $content);
3085                         $content = str_replace(BBCode::BOTTOM_ANCHOR, '<div class="body-attach">' . $trailing . '<div class="clear"></div></div>' . BBCode::BOTTOM_ANCHOR, $content);
3086                 } else {
3087                         if ($leading != '') {
3088                                 $content = '<div class="body-attach">' . $leading . '<div class="clear"></div></div>' . $content;
3089                         }
3090
3091                         if ($trailing != '') {
3092                                 $content .= '<div class="body-attach">' . $trailing . '<div class="clear"></div></div>';
3093                         }
3094                 }
3095
3096                 DI::profiler()->stopRecording();
3097                 return $content;
3098         }
3099
3100         /**
3101          * Add link attachment to the content
3102          *
3103          * @param array  $attachments
3104          * @param string $body
3105          * @param string $content
3106          * @param bool   $shared
3107          * @param array  $ignore_links A list of URLs to ignore
3108          * @return string modified content
3109          */
3110         private static function addLinkAttachment(int $uriid, array $attachments, string $body, string $content, bool $shared, array $ignore_links): string
3111         {
3112                 DI::profiler()->startRecording('rendering');
3113                 // Don't show a preview when there is a visual attachment (audio or video)
3114                 $types = array_column($attachments['visual'], 'type');
3115                 $preview = !in_array(Post\Media::IMAGE, $types) && !in_array(Post\Media::VIDEO, $types);
3116
3117                 if (!empty($attachments['link'])) {
3118                         foreach ($attachments['link'] as $link) {
3119                                 $found = false;
3120                                 foreach ($ignore_links as $ignore_link) {
3121                                         if (Strings::compareLink($link['url'], $ignore_link)) {
3122                                                 $found = true;
3123                                         }
3124                                 }
3125                                 // @todo Judge between the links to use the one with most information
3126                                 if (!$found && (empty($attachment) || !empty($link['author-name']) ||
3127                                         (empty($attachment['name']) && !empty($link['name'])) ||
3128                                         (empty($attachment['description']) && !empty($link['description'])) ||
3129                                         (empty($attachment['preview']) && !empty($link['preview'])))) {
3130                                         $attachment = $link;
3131                                 }
3132                         }
3133                 }
3134
3135                 if (!empty($attachment)) {
3136                         $data = [
3137                                 'after' => '',
3138                                 'author_name' => $attachment['author-name'] ?? '',
3139                                 'author_url' =>  $attachment['author-url'] ?? '',
3140                                 'description' => $attachment['description'] ?? '',
3141                                 'image' => '',
3142                                 'preview' => '',
3143                                 'provider_name' => $attachment['publisher-name'] ?? '',
3144                                 'provider_url' => $attachment['publisher-url'] ?? '',
3145                                 'text' => '',
3146                                 'title' => $attachment['name'] ?? '',
3147                                 'type' => 'link',
3148                                 'url' => $attachment['url']];
3149
3150                         if ($preview && !empty($attachment['preview'])) {
3151                                 if ($attachment['preview-width'] >= 500) {
3152                                         $data['image'] = Post\Media::getPreviewUrlForId($attachment['id'], Proxy::SIZE_MEDIUM);
3153                                 } else {
3154                                         $data['preview'] = Post\Media::getPreviewUrlForId($attachment['id'], Proxy::SIZE_MEDIUM);
3155                                 }
3156                         }
3157
3158                         if (!empty($data['description']) && !empty($content)) {
3159                                 similar_text($data['description'], $content, $percent);
3160                         } else {
3161                                 $percent = 0;
3162                         }
3163
3164                         if (!empty($data['description']) && (($data['title'] == $data['description']) || ($percent > 95) || (strpos($content, $data['description']) !== false))) {
3165                                 $data['description'] = '';
3166                         }
3167
3168                         if (($data['author_name'] ?? '') == ($data['provider_name'] ?? '')) {
3169                                 $data['author_name'] = '';
3170                         }
3171
3172                         if (($data['author_url'] ?? '') == ($data['provider_url'] ?? '')) {
3173                                 $data['author_url'] = '';
3174                         }
3175                 } elseif (preg_match("/.*(\[attachment.*?\].*?\[\/attachment\]).*/ism", $body, $match)) {
3176                         $data = BBCode::getAttachmentData($match[1]);
3177                 }
3178                 DI::profiler()->stopRecording();
3179
3180                 if (isset($data['url']) && !in_array($data['url'], $ignore_links)) {
3181                         if (!empty($data['description']) || !empty($data['image']) || !empty($data['preview'])) {
3182                                 $parts = parse_url($data['url']);
3183                                 if (!empty($parts['scheme']) && !empty($parts['host'])) {
3184                                         if (empty($data['provider_name'])) {
3185                                                 $data['provider_name'] = $parts['host'];
3186                                         }
3187                                         if (empty($data['provider_url']) || empty(parse_url($data['provider_url'], PHP_URL_SCHEME))) {
3188                                                 $data['provider_url'] = $parts['scheme'] . '://' . $parts['host'];
3189
3190                                                 if (!empty($parts['port'])) {
3191                                                         $data['provider_url'] .= ':' . $parts['port'];
3192                                                 }
3193                                         }
3194                                 }
3195
3196                                 // @todo Use a template
3197                                 $rendered = BBCode::convertAttachment('', BBCode::INTERNAL, false, $data, $uriid);
3198                         } elseif (!self::containsLink($content, $data['url'], Post\Media::HTML)) {
3199                                 $rendered = Renderer::replaceMacros(Renderer::getMarkupTemplate('content/link.tpl'), [
3200                                         '$url'  => $data['url'],
3201                                         '$title' => $data['title'],
3202                                 ]);
3203                         } else {
3204                                 return $content;
3205                         }
3206
3207                         if ($shared) {
3208                                 return str_replace(BBCode::BOTTOM_ANCHOR, BBCode::BOTTOM_ANCHOR . $rendered, $content);
3209                         } else {
3210                                 return $content . $rendered;
3211                         }
3212                 }
3213                 return $content;
3214         }
3215
3216         /**
3217          * Add non visual attachments to the content
3218          *
3219          * @param array $attachments
3220          * @param array $item
3221          * @param string $content
3222          * @return string modified content
3223          */
3224         private static function addNonVisualAttachments(array $attachments, array $item, string $content): string
3225         {
3226                 DI::profiler()->startRecording('rendering');
3227                 $trailing = '';
3228                 foreach ($attachments['additional'] as $attachment) {
3229                         if (strpos($item['body'], $attachment['url'])) {
3230                                 continue;
3231                         }
3232
3233                         $author = ['uid' => 0, 'id' => $item['author-id'],
3234                                 'network' => $item['author-network'], 'url' => $item['author-link']];
3235                         $the_url = Contact::magicLinkByContact($author, $attachment['url']);
3236
3237                         $title = Strings::escapeHtml(trim(($attachment['description'] ?? '') ?: $attachment['url']));
3238
3239                         if (!empty($attachment['size'])) {
3240                                 $title .= ' ' . $attachment['size'] . ' ' . DI::l10n()->t('bytes');
3241                         }
3242
3243                         /// @todo Use a template
3244                         $icon = '<div class="attachtype icon s22 type-' . $attachment['filetype'] . ' subtype-' . $attachment['subtype'] . '"></div>';
3245                         $trailing .= '<a href="' . strip_tags($the_url) . '" title="' . $title . '" class="attachlink" target="_blank" rel="noopener noreferrer" >' . $icon . '</a>';
3246                 }
3247
3248                 if ($trailing != '') {
3249                         $content .= '<div class="body-attach">' . $trailing . '<div class="clear"></div></div>';
3250                 }
3251
3252                 DI::profiler()->stopRecording();
3253                 return $content;
3254         }
3255
3256         private static function addQuestions(array $item, string $content): string
3257         {
3258                 DI::profiler()->startRecording('rendering');
3259                 if (!empty($item['question-id'])) {
3260                         $question = [
3261                                 'id'       => $item['question-id'],
3262                                 'multiple' => $item['question-multiple'],
3263                                 'voters'   => $item['question-voters'],
3264                                 'endtime'  => $item['question-end-time']
3265                         ];
3266
3267                         $options = Post\QuestionOption::getByURIId($item['uri-id']);
3268                         foreach ($options as $key => $option) {
3269                                 $percent = $question['voters'] ? ($option['replies'] / $question['voters'] * 100) : 0;
3270
3271                                 $options[$key]['percent'] = $percent;
3272
3273                                 if ($question['voters'] > 0) {
3274                                         $options[$key]['vote'] = DI::l10n()->t('%s (%d%s, %d votes)', $option['name'], round($percent, 1), '%', $option['replies']);
3275                                 } else {
3276                                         $options[$key]['vote'] = DI::l10n()->t('%s (%d votes)', $option['name'], $option['replies']);
3277                                 }
3278                         }
3279
3280                         if (!empty($question['voters']) && !empty($question['endtime'])) {
3281                                 $summary = DI::l10n()->t('%d voters. Poll end: %s', $question['voters'], Temporal::getRelativeDate($question['endtime']));
3282                         } elseif (!empty($question['voters'])) {
3283                                 $summary = DI::l10n()->t('%d voters.', $question['voters']);
3284                         } elseif (!empty($question['endtime'])) {
3285                                 $summary = DI::l10n()->t('Poll end: %s', Temporal::getRelativeDate($question['endtime']));
3286                         } else {
3287                                 $summary = '';
3288                         }
3289
3290                         $content .= Renderer::replaceMacros(Renderer::getMarkupTemplate('content/question.tpl'), [
3291                                 '$question' => $question,
3292                                 '$options'  => $options,
3293                                 '$summary'  => $summary,
3294                         ]);
3295         }
3296                 DI::profiler()->stopRecording();
3297                 return $content;
3298         }
3299
3300         /**
3301          * get private link for item
3302          *
3303          * @param array $item
3304          * @return boolean|array False if item has not plink, otherwise array('href'=>plink url, 'title'=>translated title)
3305          * @throws \Exception
3306          */
3307         public static function getPlink(array $item)
3308         {
3309                 if (!empty($item['plink']) && Network::isValidHttpUrl($item['plink'])) {
3310                         $plink = $item['plink'];
3311                 } elseif (!empty($item['uri']) && Network::isValidHttpUrl($item['uri']) && !Network::isLocalLink($item['uri'])) {
3312                         $plink = $item['uri'];
3313                 }
3314
3315                 if (local_user()) {
3316                         $ret = [
3317                                 'href' => "display/" . $item['guid'],
3318                                 'orig' => "display/" . $item['guid'],
3319                                 'title' => DI::l10n()->t('View on separate page'),
3320                                 'orig_title' => DI::l10n()->t('View on separate page'),
3321                         ];
3322
3323                         if (!empty($plink) && ($item['private'] == self::PRIVATE)) {
3324                                 $author = ['uid' => 0, 'id' => $item['author-id'],
3325                                         'network' => $item['author-network'], 'url' => $item['author-link']];
3326                                 $plink = Contact::magicLinkByContact($author, $plink);
3327                         }
3328
3329                         if (!empty($plink)) {
3330                                 $ret['href'] = DI::baseUrl()->remove($plink);
3331                                 $ret['title'] = DI::l10n()->t('Link to source');
3332                         }
3333                 } elseif (!empty($plink) && ($item['private'] != self::PRIVATE)) {
3334                         $ret = [
3335                                 'href' => $plink,
3336                                 'orig' => $plink,
3337                                 'title' => DI::l10n()->t('Link to source'),
3338                                 'orig_title' => DI::l10n()->t('Link to source'),
3339                         ];
3340                 } else {
3341                         $ret = [];
3342                 }
3343
3344                 return $ret;
3345         }
3346
3347         /**
3348          * Does the given uri-id belongs to a post that is sent as starting post to a forum?
3349          *
3350          * @param int $uri_id
3351          *
3352          * @return boolean "true" when it is a forum post
3353          */
3354         public static function isForumPost(int $uri_id): bool
3355         {
3356                 foreach (Tag::getByURIId($uri_id, [Tag::EXCLUSIVE_MENTION]) as $tag) {
3357                         if (DBA::exists('contact', ['uid' => 0, 'nurl' => Strings::normaliseLink($tag['url']), 'contact-type' => Contact::TYPE_COMMUNITY])) {
3358                                 return true;
3359                         }
3360                 }
3361                 return false;
3362         }
3363
3364         /**
3365          * Search item id for given URI or plink
3366          *
3367          * @param string $uri
3368          * @param integer $uid
3369          *
3370          * @return integer item id
3371          */
3372         public static function searchByLink(string $uri, int $uid = 0): int
3373         {
3374                 $ssl_uri = str_replace('http://', 'https://', $uri);
3375                 $uris = [$uri, $ssl_uri, Strings::normaliseLink($uri)];
3376
3377                 $item = Post::selectFirst(['id'], ['uri' => $uris, 'uid' => $uid]);
3378                 if (DBA::isResult($item)) {
3379                         return $item['id'];
3380                 }
3381
3382                 $item = Post::selectFirst(['id'], ['plink' => $uris, 'uid' => $uid]);
3383                 if (DBA::isResult($item)) {
3384                         return $item['id'];
3385                 }
3386
3387                 return 0;
3388         }
3389
3390         /**
3391          * Return the URI for a link to the post
3392          *
3393          * @param string $uri URI or link to post
3394          *
3395          * @return string URI
3396          */
3397         public static function getURIByLink(string $uri): string
3398         {
3399                 $ssl_uri = str_replace('http://', 'https://', $uri);
3400                 $uris = [$uri, $ssl_uri, Strings::normaliseLink($uri)];
3401
3402                 $item = Post::selectFirst(['uri'], ['uri' => $uris]);
3403                 if (DBA::isResult($item)) {
3404                         return $item['uri'];
3405                 }
3406
3407                 $item = Post::selectFirst(['uri'], ['plink' => $uris]);
3408                 if (DBA::isResult($item)) {
3409                         return $item['uri'];
3410                 }
3411
3412                 return '';
3413         }
3414
3415         /**
3416          * Fetches item for given URI or plink
3417          *
3418          * @param string $uri
3419          * @param integer $uid
3420          *
3421          * @return integer item id
3422          */
3423         public static function fetchByLink(string $uri, int $uid = 0): int
3424         {
3425                 Logger::info('Trying to fetch link', ['uid' => $uid, 'uri' => $uri]);
3426                 $item_id = self::searchByLink($uri, $uid);
3427                 if (!empty($item_id)) {
3428                         Logger::info('Link found', ['uid' => $uid, 'uri' => $uri, 'id' => $item_id]);
3429                         return $item_id;
3430                 }
3431
3432                 $hookData = [
3433                         'uri'     => $uri,
3434                         'uid'     => $uid,
3435                         'item_id' => null,
3436                 ];
3437
3438                 Hook::callAll('item_by_link', $hookData);
3439
3440                 if (isset($hookData['item_id'])) {
3441                         return is_numeric($hookData['item_id']) ? $hookData['item_id'] : 0;
3442                 }
3443
3444                 $fetched_uri = ActivityPub\Processor::fetchMissingActivity($uri);
3445
3446                 if ($fetched_uri) {
3447                         $item_id = self::searchByLink($fetched_uri, $uid);
3448                 } else {
3449                         $item_id = Diaspora::fetchByURL($uri);
3450                 }
3451
3452                 if (!empty($item_id)) {
3453                         Logger::info('Link fetched', ['uid' => $uid, 'uri' => $uri, 'id' => $item_id]);
3454                         return $item_id;
3455                 }
3456
3457                 Logger::info('Link not found', ['uid' => $uid, 'uri' => $uri]);
3458                 return 0;
3459         }
3460
3461         /**
3462          * Return share data from an item array (if the item is shared item)
3463          * We are providing the complete Item array, because at some time in the future
3464          * we hopefully will define these values not in the body anymore but in some item fields.
3465          * This function is meant to replace all similar functions in the system.
3466          *
3467          * @param array $item
3468          *
3469          * @return array with share information
3470          */
3471         public static function getShareArray(array $item): array
3472         {
3473                 return BBCode::fetchShareAttributes($item['body']);
3474         }
3475
3476         /**
3477          * Fetch item information for shared items from the original items and adds it.
3478          *
3479          * @param array $item
3480          *
3481          * @return array item array with data from the original item
3482          */
3483         public static function addShareDataFromOriginal(array $item): array
3484         {
3485                 $shared = self::getShareArray($item);
3486                 if (empty($shared)) {
3487                         return $item;
3488                 }
3489
3490                 // Real reshares always have got a GUID.
3491                 if (empty($shared['guid'])) {
3492                         return $item;
3493                 }
3494
3495                 $uid = $item['uid'] ?? 0;
3496
3497                 // first try to fetch the item via the GUID. This will work for all reshares that had been created on this system
3498                 $shared_item = Post::selectFirst(['title', 'body'], ['guid' => $shared['guid'], 'uid' => [0, $uid]]);
3499                 if (!DBA::isResult($shared_item)) {
3500                         if (empty($shared['link'])) {
3501                                 return $item;
3502                         }
3503
3504                         // Otherwhise try to find (and possibly fetch) the item via the link. This should work for Diaspora and ActivityPub posts
3505                         $id = self::fetchByLink($shared['link'] ?? '', $uid);
3506                         if (empty($id)) {
3507                                 Logger::info('Original item not found', ['url' => $shared['link'] ?? '', 'callstack' => System::callstack()]);
3508                                 return $item;
3509                         }
3510
3511                         $shared_item = Post::selectFirst(['title', 'body'], ['id' => $id]);
3512                         if (!DBA::isResult($shared_item)) {
3513                                 return $item;
3514                         }
3515                         Logger::info('Got shared data from url', ['url' => $shared['link'], 'callstack' => System::callstack()]);
3516                 } else {
3517                         Logger::info('Got shared data from guid', ['guid' => $shared['guid'], 'callstack' => System::callstack()]);
3518                 }
3519
3520                 if (!empty($shared_item['title'])) {
3521                         $body = '[h3]' . $shared_item['title'] . "[/h3]\n" . $shared_item['body'];
3522                         unset($shared_item['title']);
3523                 } else {
3524                         $body = $shared_item['body'];
3525                 }
3526
3527                 $item['body'] = preg_replace("/\[share ([^\[\]]*)\].*\[\/share\]/ism", '[share $1]' . str_replace('$', '\$', $body) . '[/share]', $item['body']);
3528                 unset($shared_item['body']);
3529
3530                 return array_merge($item, $shared_item);
3531         }
3532
3533         /**
3534          * Check a prospective item array against user-level permissions
3535          *
3536          * @param array $item Expected keys: uri, gravity, and
3537          *                    author-link if is author-id is set,
3538          *                    owner-link if is owner-id is set,
3539          *                    causer-link if is causer-id is set.
3540          * @param int   $user_id Local user ID
3541          * @return bool
3542          * @throws \Exception
3543          */
3544         protected static function isAllowedByUser(array $item, int $user_id): bool
3545         {
3546                 if (!empty($item['author-id']) && Contact\User::isBlocked($item['author-id'], $user_id)) {
3547                         Logger::notice('Author is blocked by user', ['author-link' => $item['author-link'], 'uid' => $user_id, 'item-uri' => $item['uri']]);
3548                         return false;
3549                 }
3550
3551                 if (!empty($item['owner-id']) && Contact\User::isBlocked($item['owner-id'], $user_id)) {
3552                         Logger::notice('Owner is blocked by user', ['owner-link' => $item['owner-link'], 'uid' => $user_id, 'item-uri' => $item['uri']]);
3553                         return false;
3554                 }
3555
3556                 // The causer is set during a thread completion, for example because of a reshare. It countains the responsible actor.
3557                 if (!empty($item['causer-id']) && Contact\User::isBlocked($item['causer-id'], $user_id)) {
3558                         Logger::notice('Causer is blocked by user', ['causer-link' => $item['causer-link'] ?? $item['causer-id'], 'uid' => $user_id, 'item-uri' => $item['uri']]);
3559                         return false;
3560                 }
3561
3562                 if (!empty($item['causer-id']) && ($item['gravity'] === GRAVITY_PARENT) && Contact\User::isIgnored($item['causer-id'], $user_id)) {
3563                         Logger::notice('Causer is ignored by user', ['causer-link' => $item['causer-link'] ?? $item['causer-id'], 'uid' => $user_id, 'item-uri' => $item['uri']]);
3564                         return false;
3565                 }
3566
3567                 return true;
3568         }
3569
3570         /**
3571          * Improve the data in shared posts
3572          *
3573          * @param array $item
3574          * @return string body
3575          */
3576         public static function improveSharedDataInBody(array $item): string
3577         {
3578                 $shared = BBCode::fetchShareAttributes($item['body']);
3579                 if (empty($shared['link'])) {
3580                         return $item['body'];
3581                 }
3582
3583                 $id = self::fetchByLink($shared['link']);
3584                 Logger::info('Fetched shared post', ['uri-id' => $item['uri-id'], 'id' => $id, 'author' => $shared['profile'], 'url' => $shared['link'], 'guid' => $shared['guid'], 'callstack' => System::callstack()]);
3585                 if (!$id) {
3586                         return $item['body'];
3587                 }
3588
3589                 $shared_item = Post::selectFirst(['author-name', 'author-link', 'author-avatar', 'plink', 'created', 'guid', 'title', 'body'], ['id' => $id]);
3590                 if (!DBA::isResult($shared_item)) {
3591                         return $item['body'];
3592                 }
3593
3594                 $shared_content = BBCode::getShareOpeningTag($shared_item['author-name'], $shared_item['author-link'], $shared_item['author-avatar'], $shared_item['plink'], $shared_item['created'], $shared_item['guid']);
3595
3596                 if (!empty($shared_item['title'])) {
3597                         $shared_content .= '[h3]'.$shared_item['title'].'[/h3]'."\n";
3598                 }
3599
3600                 $shared_content .= $shared_item['body'];
3601
3602                 $item['body'] = preg_replace("/\[share.*?\](.*)\[\/share\]/ism", $shared_content . '[/share]', $item['body']);
3603                 Logger::info('New shared data', ['uri-id' => $item['uri-id'], 'id' => $id, 'shared_item' => $shared_item]);
3604                 return $item['body'];
3605         }
3606 }