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                 $item['post-reason'] = self::getPostReason($item);
 909
 910                 // Ensure that there is an avatar cache
 911                 Contact::checkAvatarCache($item['author-id']);
 912                 Contact::checkAvatarCache($item['owner-id']);
 913
 914                 // The contact-id should be set before "self::insert" was called - but there seems to be issues sometimes
 915                 $item['contact-id'] = self::contactId($item);
 916
 917                 if (!empty($item['direction']) && in_array($item['direction'], [Conversation::PUSH, Conversation::RELAY]) &&
 918                         empty($item['origin']) && self::isTooOld($item)) {
 919                         Logger::info('Item is too old', ['item' => $item]);
 920                         return 0;
 921                 }
 922
 923                 if (!self::isValid($item)) {
 924                         return 0;
 925                 }
 926
 927                 if ($item['gravity'] !== GRAVITY_PARENT) {
 928                         $toplevel_parent = self::getTopLevelParent($item);
 929                         if (empty($toplevel_parent)) {
 930                                 return 0;
 931                         }
 932
 933                         // If the thread originated from this node, we check the permission against the thread starter
 934                         $condition = ['uri-id' => $toplevel_parent['uri-id'], 'wall' => true];
 935                         $localTopLevelParent = Post::selectFirst(['uid'], $condition);
 936                         if (!empty($localTopLevelParent['uid']) && !self::isAllowedByUser($item, $localTopLevelParent['uid'])) {
 937                                 return 0;
 938                         }
 939
 940                         $parent_id             = $toplevel_parent['id'];
 941                         $item['parent-uri']    = $toplevel_parent['uri'];
 942                         $item['parent-uri-id'] = $toplevel_parent['uri-id'];
 943                         $item['deleted']       = $toplevel_parent['deleted'];
 944
 945                         // Reshares have to keep their permissions to allow forums to work
 946                         if (!$item['origin'] || ($item['verb'] != Activity::ANNOUNCE)) {
 947                                 $item['allow_cid']     = $toplevel_parent['allow_cid'];
 948                                 $item['allow_gid']     = $toplevel_parent['allow_gid'];
 949                                 $item['deny_cid']      = $toplevel_parent['deny_cid'];
 950                                 $item['deny_gid']      = $toplevel_parent['deny_gid'];
 951                         }
 952
 953                         $parent_origin         = $toplevel_parent['origin'];
 954
 955                         // Don't federate received participation messages
 956                         if ($item['verb'] != Activity::FOLLOW) {
 957                                 $item['wall'] = $toplevel_parent['wall'];
 958                         } else {
 959                                 $item['wall'] = false;
 960                                 // Participations are technical messages, so they are set to "seen" automatically
 961                                 $item['unseen'] = false;
 962                         }
 963
 964                         /*
 965                          * If the parent is private, force privacy for the entire conversation
 966                          * This differs from the above settings as it subtly allows comments from
 967                          * email correspondents to be private even if the overall thread is not.
 968                          */
 969                         if ($toplevel_parent['private']) {
 970                                 $item['private'] = $toplevel_parent['private'];
 971                         }
 972
 973                         // If its a post that originated here then tag the thread as "mention"
 974                         if ($item['origin'] && $item['uid']) {
 975                                 DBA::update('post-thread-user', ['mention' => true], ['uri-id' => $item['parent-uri-id'], 'uid' => $item['uid']]);
 976                                 Logger::info('tagged thread as mention', ['parent' => $parent_id, 'parent-uri-id' => $item['parent-uri-id'], 'uid' => $item['uid']]);
 977                         }
 978
 979                         // Update the contact relations
 980                         Contact\Relation::store($toplevel_parent['author-id'], $item['author-id'], $item['created']);
 981                 } else {
 982                         $parent_id = 0;
 983                         $parent_origin = $item['origin'];
 984
 985                         if ($item['wall'] && empty($item['conversation'])) {
 986                                 $item['conversation'] = $item['parent-uri'] . '#context';
 987                         }
 988                 }
 989
 990                 $item['parent-uri-id'] = ItemURI::getIdByURI($item['parent-uri']);
 991                 $item['thr-parent-id'] = ItemURI::getIdByURI($item['thr-parent']);
 992
 993                 if (!empty($item['conversation']) && empty($item['conversation-id'])) {
 994                         $item['conversation-id'] = ItemURI::getIdByURI($item['conversation']);
 995                 }
 996
 997                 // Is this item available in the global items (with uid=0)?
 998                 if ($item['uid'] == 0) {
 999                         $item['global'] = true;
1000
1001                         // Set the global flag on all items if this was a global item entry
1002                         Post::update(['global' => true], ['uri-id' => $item['uri-id']]);
1003                 } else {
1004                         $item['global'] = Post::exists(['uid' => 0, 'uri-id' => $item['uri-id']]);
1005                 }
1006
1007                 // ACL settings
1008                 if (!empty($item['allow_cid'] . $item['allow_gid'] . $item['deny_cid'] . $item['deny_gid'])) {
1009                         $item['private'] = self::PRIVATE;
1010                 }
1011
1012                 if ($notify && $post_local) {
1013                         $item['edit'] = false;
1014                         $item['parent'] = $parent_id;
1015
1016                         // Trigger automatic reactions for addons
1017                         if (!isset($item['api_source'])) {
1018                                 $item['api_source'] = true;
1019                         }
1020
1021                         // We have to tell the hooks who we are - this really should be improved
1022                         if (!local_user()) {
1023                                 $_SESSION['authenticated'] = true;
1024                                 $_SESSION['uid'] = $uid;
1025                                 $dummy_session = true;
1026                         } else {
1027                                 $dummy_session = false;
1028                         }
1029
1030                         Hook::callAll('post_local', $item);
1031
1032                         if ($dummy_session) {
1033                                 unset($_SESSION['authenticated']);
1034                                 unset($_SESSION['uid']);
1035                         }
1036                 } elseif (!$notify) {
1037                         Hook::callAll('post_remote', $item);
1038                 }
1039
1040                 if (!empty($item['cancel'])) {
1041                         Logger::notice('post cancelled by addon.');
1042                         return 0;
1043                 }
1044
1045                 if (empty($item['vid']) && !empty($item['verb'])) {
1046                         $item['vid'] = Verb::getID($item['verb']);
1047                 }
1048
1049                 // Creates or assigns the permission set
1050                 $item['psid'] = DI::permissionSet()->selectOrCreate(
1051                         DI::permissionSetFactory()->createFromString(
1052                                 $item['uid'],
1053                                 $item['allow_cid'],
1054                                 $item['allow_gid'],
1055                                 $item['deny_cid'],
1056                                 $item['deny_gid']
1057                 ))->id;
1058
1059                 if (!empty($item['extid'])) {
1060                         $item['external-id'] = ItemURI::getIdByURI($item['extid']);
1061                 }
1062
1063                 if ($item['verb'] == Activity::ANNOUNCE) {
1064                         self::setOwnerforResharedItem($item);
1065                 }
1066
1067                 if (isset($item['attachments'])) {
1068                         foreach ($item['attachments'] as $attachment) {
1069                                 $attachment['uri-id'] = $item['uri-id'];
1070                                 Post\Media::insert($attachment);
1071                         }
1072                         unset($item['attachments']);
1073                 }
1074
1075                 Post\Media::insertFromAttachmentData($item['uri-id'], $item['body']);
1076
1077                 // Remove all media attachments from the body and store them in the post-media table
1078                 $item['raw-body'] = Post\Media::insertFromBody($item['uri-id'], $item['raw-body']);
1079                 $item['raw-body'] = self::setHashtags($item['raw-body']);
1080
1081                 if (!DBA::exists('contact', ['id' => $item['author-id'], 'network' => Protocol::DFRN])) {
1082                         Post\Media::insertFromRelevantUrl($item['uri-id'], $item['raw-body']);
1083                 }
1084
1085                 // Check for hashtags in the body and repair or add hashtag links
1086                 $item['body'] = self::setHashtags($item['body']);
1087
1088                 $notify_type = Delivery::POST;
1089
1090                 // Filling item related side tables
1091                 if (!empty($item['attach'])) {
1092                         Post\Media::insertFromAttachment($item['uri-id'], $item['attach']);
1093                 }
1094
1095                 if (empty($item['event-id'])) {
1096                         unset($item['event-id']);
1097
1098                         $ev = Event::fromBBCode($item['body']);
1099                         if ((!empty($ev['desc']) || !empty($ev['summary'])) && !empty($ev['start'])) {
1100                                 Logger::info('Event found.');
1101                                 $ev['cid']       = $item['contact-id'];
1102                                 $ev['uid']       = $item['uid'];
1103                                 $ev['uri']       = $item['uri'];
1104                                 $ev['edited']    = $item['edited'];
1105                                 $ev['private']   = $item['private'];
1106                                 $ev['guid']      = $item['guid'];
1107                                 $ev['plink']     = $item['plink'];
1108                                 $ev['network']   = $item['network'];
1109                                 $ev['protocol']  = $item['protocol'] ?? Conversation::PARCEL_UNKNOWN;
1110                                 $ev['direction'] = $item['direction'] ?? Conversation::UNKNOWN;
1111                                 $ev['source']    = $item['source'] ?? '';
1112
1113                                 $event = DBA::selectFirst('event', ['id'], ['uri' => $item['uri'], 'uid' => $item['uid']]);
1114                                 if (DBA::isResult($event)) {
1115                                         $ev['id'] = $event['id'];
1116                                 }
1117
1118                                 $event_id = Event::store($ev);
1119                                 $item = Event::getItemArrayForImportedId($event_id, $item);
1120
1121                                 Logger::info('Event was stored', ['id' => $event_id]);
1122                         }
1123                 }
1124
1125                 if (empty($item['causer-id'])) {
1126                         unset($item['causer-id']);
1127                 }
1128
1129                 if (in_array($item['network'], [Protocol::ACTIVITYPUB, Protocol::DFRN])) {
1130                         $content_warning = BBCode::getAbstract($item['body'], Protocol::ACTIVITYPUB);
1131                         if (!empty($content_warning) && empty($item['content-warning'])) {
1132                                 $item['content-warning'] = BBCode::toPlaintext($content_warning);
1133                         }
1134                 }
1135
1136                 Post::insert($item['uri-id'], $item);
1137
1138                 if ($item['gravity'] == GRAVITY_PARENT) {
1139                         Post\Thread::insert($item['uri-id'], $item);
1140                 }
1141
1142                 if (!in_array($item['verb'], self::ACTIVITIES)) {
1143                         Post\Content::insert($item['uri-id'], $item);
1144                 }
1145
1146                 // Create Diaspora signature
1147                 if ($item['origin'] && empty($item['diaspora_signed_text']) && ($item['gravity'] != GRAVITY_PARENT)) {
1148                         $signed = Diaspora::createCommentSignature($item);
1149                         if (!empty($signed)) {
1150                                 $item['diaspora_signed_text'] = json_encode($signed);
1151                         }
1152                 }
1153
1154                 if (!empty($item['diaspora_signed_text'])) {
1155                         DBA::replace('diaspora-interaction', ['uri-id' => $item['uri-id'], 'interaction' => $item['diaspora_signed_text']]);
1156                 }
1157
1158                 // Attached file links
1159                 if (!empty($item['file'])) {
1160                         Post\Category::storeTextByURIId($item['uri-id'], $item['uid'], $item['file']);
1161                 }
1162
1163                 // Delivery relevant data
1164                 $delivery_data = Post\DeliveryData::extractFields($item);
1165
1166                 if (!empty($item['origin']) || !empty($item['wall']) || !empty($delivery_data['postopts']) || !empty($delivery_data['inform'])) {
1167                         Post\DeliveryData::insert($item['uri-id'], $delivery_data);
1168                 }
1169
1170                 // Store tags from the body if this hadn't been handled previously in the protocol classes
1171                 if (!Tag::existsForPost($item['uri-id'])) {
1172                         Tag::storeFromBody($item['uri-id'], $item['body']);
1173                 }
1174
1175                 $condition = ['uri-id' => $item['uri-id'], 'uid' => $item['uid']];
1176                 if (Post::exists($condition)) {
1177                         Logger::notice('Item is already inserted - aborting', $condition);
1178                         return 0;
1179                 }
1180
1181                 $post_user_id = Post\User::insert($item['uri-id'], $item['uid'], $item);
1182                 if (!$post_user_id) {
1183                         Logger::notice('Post-User is already inserted - aborting', ['uid' => $item['uid'], 'uri-id' => $item['uri-id']]);
1184                         return 0;
1185                 }
1186
1187                 if ($item['gravity'] == GRAVITY_PARENT) {
1188                         $item['post-user-id'] = $post_user_id;
1189                         Post\ThreadUser::insert($item['uri-id'], $item['uid'], $item);
1190                 }
1191
1192                 Logger::notice('created item', ['post-id' => $post_user_id, 'uid' => $item['uid'], 'network' => $item['network'], 'uri-id' => $item['uri-id'], 'guid' => $item['guid']]);
1193
1194                 $posted_item = Post::selectFirst(self::ITEM_FIELDLIST, ['post-user-id' => $post_user_id]);
1195                 if (!DBA::isResult($posted_item)) {
1196                         // On failure store the data into a spool file so that the "SpoolPost" worker can try again later.
1197                         Logger::warning('Could not store item. it will be spooled', ['id' => $post_user_id]);
1198                         self::spool($orig_item);
1199                         return 0;
1200                 }
1201
1202                 // update the commented timestamp on the parent
1203                 if (DI::config()->get('system', 'like_no_comment')) {
1204                         // Update when it is a comment
1205                         $update_commented = in_array($posted_item['gravity'], [GRAVITY_PARENT, GRAVITY_COMMENT]);
1206                 } else {
1207                         // Update when it isn't a follow or tag verb
1208                         $update_commented = !in_array($posted_item['verb'], [Activity::FOLLOW, Activity::TAG]);
1209                 }
1210
1211                 if ($update_commented) {
1212                         $fields = ['commented' => DateTimeFormat::utcNow(), 'changed' => DateTimeFormat::utcNow()];
1213                 } else {
1214                         $fields = ['changed' => DateTimeFormat::utcNow()];
1215                 }
1216
1217                 Post::update($fields, ['uri-id' => $posted_item['parent-uri-id'], 'uid' => $posted_item['uid']]);
1218
1219                 // In that function we check if this is a forum post. Additionally we delete the item under certain circumstances
1220                 if (self::tagDeliver($posted_item['uid'], $post_user_id)) {
1221                         // Get the user information for the logging
1222                         $user = User::getById($uid);
1223
1224                         Logger::notice('Item had been deleted', ['id' => $post_user_id, 'user' => $uid, 'account-type' => $user['account-type']]);
1225                         return 0;
1226                 }
1227
1228                 if ($notify) {
1229                         if (!\Friendica\Content\Feature::isEnabled($posted_item['uid'], 'explicit_mentions') && ($posted_item['gravity'] == GRAVITY_COMMENT)) {
1230                                 Tag::createImplicitMentions($posted_item['uri-id'], $posted_item['thr-parent-id']);
1231                         }
1232                         Hook::callAll('post_local_end', $posted_item);
1233                 } else {
1234                         Hook::callAll('post_remote_end', $posted_item);
1235                 }
1236
1237                 if ($posted_item['gravity'] === GRAVITY_PARENT) {
1238                         self::addShadow($post_user_id);
1239                 } else {
1240                         self::addShadowPost($post_user_id);
1241                 }
1242
1243                 self::updateContact($posted_item);
1244
1245                 Post\UserNotification::setNotification($posted_item['uri-id'], $posted_item['uid']);
1246
1247                 // Distribute items to users who subscribed to their tags
1248                 self::distributeByTags($posted_item);
1249
1250                 // Automatically reshare the item if the "remote_self" option is selected
1251                 self::autoReshare($posted_item);
1252
1253                 $transmit = $notify || ($posted_item['visible'] && ($parent_origin || $posted_item['origin']));
1254
1255                 if ($transmit) {
1256                         // Don't relay participation messages
1257                         if (($posted_item['verb'] == Activity::FOLLOW) &&
1258                                 (!$posted_item['origin'] || ($posted_item['author-id'] != Contact::getPublicIdByUserId($uid)))) {
1259                                 Logger::info('Participation messages will not be relayed', ['item' => $posted_item['id'], 'uri' => $posted_item['uri'], 'verb' => $posted_item['verb']]);
1260                                 $transmit = false;
1261                         }
1262                 }
1263
1264                 if ($transmit) {
1265                         if (!empty($source)) {
1266                                 Post\Activity::insert($item['uri-id'], $source);
1267                         }
1268                         Worker::add(['priority' => $priority, 'dont_fork' => true], 'Notifier', $notify_type, (int)$posted_item['uri-id'], (int)$posted_item['uid']);
1269                 }
1270
1271                 // Fill the cache with the rendered content.
1272                 if (in_array($posted_item['gravity'], [GRAVITY_PARENT, GRAVITY_COMMENT]) && ($posted_item['uid'] == 0)) {
1273                         self::updateDisplayCache($posted_item['uri-id']);
1274                 }
1275
1276                 return $post_user_id;
1277         }
1278
1279         /**
1280          * Fetch the post reason for a given item array
1281          *
1282          * @param array $item
1283          *
1284          * @return integer
1285          */
1286         public static function getPostReason(array $item): int
1287         {
1288                 $actor = ($item['gravity'] == GRAVITY_PARENT) ? $item['owner-id'] : $item['author-id'];
1289                 if (empty($item['origin']) && ($item['uid'] != 0) && Contact::isSharing($actor, $item['uid'])) {
1290                         return self::PR_FOLLOWER;
1291                 }
1292
1293                 if (!empty($item['origin']) && empty($item['post-reason'])) {
1294                         return self::PR_LOCAL;
1295                 }
1296
1297                 return $item['post-reason'] ?? self::PR_NONE;
1298         }
1299
1300         /**
1301          * Update the display cache
1302          *
1303          * @param integer $uri_id
1304          * @return void
1305          */
1306         public static function updateDisplayCache(int $uri_id)
1307         {
1308                 $item = Post::selectFirst(self::DISPLAY_FIELDLIST, ['uri-id' => $uri_id]);
1309                 self::prepareBody($item, false, false, true);
1310         }
1311
1312         /**
1313          * Change the owner of a parent item if it had been shared by a forum
1314          *
1315          * (public) forum posts in the new format consist of the regular post by the author
1316          * followed by an announce message sent from the forum account.
1317          * Changing the owner helps in grouping forum posts.
1318          *
1319          * @param array $item
1320          * @return void
1321          */
1322         private static function setOwnerforResharedItem(array $item)
1323         {
1324                 $parent = Post::selectFirst(['id', 'causer-id', 'owner-id', 'author-id', 'author-link', 'origin', 'post-reason'],
1325                         ['uri-id' => $item['thr-parent-id'], 'uid' => $item['uid']]);
1326                 if (!DBA::isResult($parent)) {
1327                         Logger::error('Parent not found', ['uri-id' => $item['thr-parent-id'], 'uid' => $item['uid']]);
1328                         return;
1329                 }
1330
1331                 $author = Contact::selectFirst(['url', 'contact-type', 'network'], ['id' => $item['author-id']]);
1332                 if (!DBA::isResult($author)) {
1333                         Logger::error('Author not found', ['id' => $item['author-id']]);
1334                         return;
1335                 }
1336
1337                 $self_contact = Contact::selectFirst(['id'], ['uid' => $item['uid'], 'self' => true]);
1338                 $self = !empty($self_contact) ? $self_contact['id'] : 0;
1339
1340                 $cid = Contact::getIdForURL($author['url'], $item['uid']);
1341                 if (empty($cid) || (!Contact::isSharing($cid, $item['uid']) && ($cid != $self))) {
1342                         Logger::info('The resharer is not a following contact: quit', ['resharer' => $author['url'], 'uid' => $item['uid'], 'cid' => $cid]);
1343                         return;
1344                 }
1345
1346                 if ($author['contact-type'] != Contact::TYPE_COMMUNITY) {
1347                         if ($parent['post-reason'] == self::PR_ANNOUNCEMENT) {
1348                                 Logger::info('The parent is already marked as announced: quit', ['causer' => $parent['causer-id'], 'owner' => $parent['owner-id'], 'author' => $parent['author-id'], 'uid' => $item['uid']]);
1349                                 return;
1350                         }
1351
1352                         if (Contact::isSharing($parent['owner-id'], $item['uid'])) {
1353                                 Logger::info('The resharer is no forum: quit', ['resharer' => $item['author-id'], 'owner' => $parent['owner-id'], 'author' => $parent['author-id'], 'uid' => $item['uid']]);
1354                                 return;
1355                         }
1356                 }
1357
1358                 self::update(['post-reason' => self::PR_ANNOUNCEMENT, 'causer-id' => $item['author-id']], ['id' => $parent['id']]);
1359                 Logger::info('Set announcement post-reason', ['uri-id' => $item['uri-id'], 'thr-parent-id' => $item['thr-parent-id'], 'uid' => $item['uid']]);
1360         }
1361
1362         /**
1363          * Distribute the given item to users who subscribed to their tags
1364          *
1365          * @param array $item     Processed item
1366          */
1367         private static function distributeByTags(array $item)
1368         {
1369                 if (($item['uid'] != 0) || ($item['gravity'] != GRAVITY_PARENT) || !in_array($item['network'], Protocol::FEDERATED)) {
1370                         return;
1371                 }
1372
1373                 $uids = Tag::getUIDListByURIId($item['uri-id']);
1374                 foreach ($uids as $uid) {
1375                         $stored = self::storeForUserByUriId($item['uri-id'], $uid, ['post-reason' => self::PR_TAG]);
1376                         Logger::info('Stored item for users', ['uri-id' => $item['uri-id'], 'uid' => $uid, 'stored' => $stored]);
1377                 }
1378         }
1379
1380         /**
1381          * Distributes public items to the receivers
1382          *
1383          * @param integer $itemid      Item ID that should be added
1384          * @param string  $signed_text Original text (for Diaspora signatures), JSON encoded.
1385          * @throws \Exception
1386          */
1387         public static function distribute(int $itemid, string $signed_text = '')
1388         {
1389                 $condition = ["`id` IN (SELECT `parent` FROM `post-user-view` WHERE `id` = ?)", $itemid];
1390                 $parent = Post::selectFirst(['owner-id'], $condition);
1391                 if (!DBA::isResult($parent)) {
1392                         Logger::warning('Item not found', ['condition' => $condition]);
1393                         return;
1394                 }
1395
1396                 // Only distribute public items from native networks
1397                 $condition = ['id' => $itemid, 'uid' => 0,
1398                         'network' => array_merge(Protocol::FEDERATED ,['']),
1399                         'visible' => true, 'deleted' => false, 'private' => [self::PUBLIC, self::UNLISTED]];
1400                 $item = Post::selectFirst(array_merge(self::ITEM_FIELDLIST, ['protocol']), $condition);
1401                 if (!DBA::isResult($item)) {
1402                         Logger::warning('Item not found', ['condition' => $condition]);
1403                         return;
1404                 }
1405
1406                 $origin = $item['origin'];
1407
1408                 $users = [];
1409
1410                 /// @todo add a field "pcid" in the contact table that referrs to the public contact id.
1411                 $owner = DBA::selectFirst('contact', ['url', 'nurl', 'alias'], ['id' => $parent['owner-id']]);
1412                 if (!DBA::isResult($owner)) {
1413                         return;
1414                 }
1415
1416                 $condition = ['nurl' => $owner['nurl'], 'rel' => [Contact::SHARING, Contact::FRIEND]];
1417                 $contacts = DBA::select('contact', ['uid'], $condition);
1418                 while ($contact = DBA::fetch($contacts)) {
1419                         if ($contact['uid'] == 0) {
1420                                 continue;
1421                         }
1422
1423                         $users[$contact['uid']] = $contact['uid'];
1424                 }
1425                 DBA::close($contacts);
1426
1427                 $condition = ['alias' => $owner['url'], 'rel' => [Contact::SHARING, Contact::FRIEND]];
1428                 $contacts = DBA::select('contact', ['uid'], $condition);
1429                 while ($contact = DBA::fetch($contacts)) {
1430                         if ($contact['uid'] == 0) {
1431                                 continue;
1432                         }
1433
1434                         $users[$contact['uid']] = $contact['uid'];
1435                 }
1436                 DBA::close($contacts);
1437
1438                 if (!empty($owner['alias'])) {
1439                         $condition = ['nurl' => Strings::normaliseLink($owner['alias']), 'rel' => [Contact::SHARING, Contact::FRIEND]];
1440                         $contacts = DBA::select('contact', ['uid'], $condition);
1441                         while ($contact = DBA::fetch($contacts)) {
1442                                 if ($contact['uid'] == 0) {
1443                                         continue;
1444                                 }
1445
1446                                 $users[$contact['uid']] = $contact['uid'];
1447                         }
1448                         DBA::close($contacts);
1449                 }
1450
1451                 $origin_uid = 0;
1452
1453                 if ($item['uri-id'] != $item['parent-uri-id']) {
1454                         $parents = Post::select(['uid', 'origin'], ["`uri-id` = ? AND `uid` != 0", $item['parent-uri-id']]);
1455                         while ($parent = Post::fetch($parents)) {
1456                                 $users[$parent['uid']] = $parent['uid'];
1457                                 if ($parent['origin'] && !$origin) {
1458                                         $origin_uid = $parent['uid'];
1459                                 }
1460                         }
1461                         DBA::close($parents);
1462                 }
1463
1464                 foreach ($users as $uid) {
1465                         if ($origin_uid == $uid) {
1466                                 $item['diaspora_signed_text'] = $signed_text;
1467                         }
1468                         $item['post-reason'] = self::PR_DISTRIBUTE;
1469                         self::storeForUser($item, $uid);
1470                 }
1471         }
1472
1473         /**
1474          * Store a public item defined by their URI-ID for the given users
1475          *
1476          * @param integer $uri_id     URI-ID of the given item
1477          * @param integer $uid        The user that will receive the item entry
1478          * @param array   $fields     Additional fields to be stored
1479          * @param integer $source_uid User id of the source post
1480          * @return integer stored item id
1481          */
1482         public static function storeForUserByUriId(int $uri_id, int $uid, array $fields = [], int $source_uid = 0): int
1483         {
1484                 if ($uid == $source_uid) {
1485                         Logger::warning('target UID must not be be equal to the source UID', ['uri-id' => $uri_id, 'uid' => $uid]);
1486                         return 0;
1487                 }
1488
1489                 $item = Post::selectFirst(array_merge(self::ITEM_FIELDLIST, ['protocol']), ['uri-id' => $uri_id, 'uid' => $source_uid]);
1490                 if (!DBA::isResult($item)) {
1491                         Logger::warning('Item could not be fetched', ['uri-id' => $uri_id, 'uid' => $source_uid]);
1492                         return 0;
1493                 }
1494
1495                 if (($uid != 0) && ($item['gravity'] == GRAVITY_PARENT)) {
1496                         $owner = User::getOwnerDataById($uid);
1497                         if (($owner['contact-type'] == User::ACCOUNT_TYPE_COMMUNITY) && !Tag::isMentioned($uri_id, $owner['url'])) {
1498                                 Logger::info('Target user is a forum but is not mentioned here, thread will not be stored', ['uid' => $uid, 'uri-id' => $uri_id]);
1499                                 return 0;
1500                         }
1501                 }
1502
1503                 if (($source_uid == 0) && (($item['private'] == self::PRIVATE) || !in_array($item['network'], Protocol::FEDERATED))) {
1504                         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']]);
1505                         return 0;
1506                 }
1507
1508                 $item['post-reason'] = self::PR_STORED;
1509
1510                 $item = array_merge($item, $fields);
1511
1512                 $item['post-reason'] = self::getPostReason($item);
1513
1514                 $is_reshare = ($item['gravity'] == GRAVITY_ACTIVITY) && ($item['verb'] == Activity::ANNOUNCE);
1515
1516                 if (($uid != 0) && (($item['gravity'] == GRAVITY_PARENT) || $is_reshare) &&
1517                         DI::pConfig()->get($uid, 'system', 'accept_only_sharer') == self::COMPLETION_NONE &&
1518                         !in_array($item['post-reason'], [self::PR_FOLLOWER, self::PR_TAG, self::PR_TO, self::PR_CC])) {
1519                         Logger::info('Contact is not a follower, thread will not be stored', ['author' => $item['author-link'], 'uid' => $uid, 'uri-id' => $uri_id]);
1520                         return 0;
1521                 }
1522
1523                 $causer = $item['causer-id'] ?: $item['author-id'];
1524
1525                 if (($uri_id != $item['parent-uri-id']) && ($item['gravity'] == GRAVITY_COMMENT) && !Post::exists(['uri-id' => $item['parent-uri-id'], 'uid' => $uid])) {
1526                         if (!self::fetchParent($item['parent-uri-id'], $uid, $causer)) {
1527                                 Logger::info('Parent post had not been added', ['uri-id' => $item['parent-uri-id'], 'uid' => $uid, 'causer' => $causer]);
1528                                 return 0;
1529                         }
1530                         Logger::info('Fetched parent post', ['uri-id' => $item['parent-uri-id'], 'uid' => $uid, 'causer' => $causer]);
1531                 } elseif (($uri_id != $item['thr-parent-id']) && $is_reshare && !Post::exists(['uri-id' => $item['thr-parent-id'], 'uid' => $uid])) {
1532                         if (!self::fetchParent($item['thr-parent-id'], $uid, $causer)) {
1533                                 Logger::info('Thread parent had not been added', ['uri-id' => $item['thr-parent-id'], 'uid' => $uid, 'causer' => $causer]);
1534                                 return 0;
1535                         }
1536                         Logger::info('Fetched thread parent', ['uri-id' => $item['thr-parent-id'], 'uid' => $uid, 'causer' => $causer]);
1537                 }
1538
1539                 $stored = self::storeForUser($item, $uid);
1540                 Logger::info('Item stored for user', ['uri-id' => $item['uri-id'], 'uid' => $uid, 'causer' => $causer, 'source-uid' => $source_uid, 'stored' => $stored]);
1541                 return $stored;
1542         }
1543
1544         /**
1545          * Fetch the parent with the given uri-id
1546          *
1547          * @param integer $uri_id
1548          * @param integer $uid
1549          * @param integer $causer
1550          *
1551          * @return integer
1552          */
1553         private static function fetchParent(int $uri_id, int $uid, int $causer): int
1554         {
1555                 // Fetch the origin user for the post
1556                 $origin_uid = self::GetOriginUidForUriId($uri_id, $uid);
1557                 if (is_null($origin_uid)) {
1558                         Logger::info('Origin item was not found', ['uid' => $uid, 'uri-id' => $uri_id]);
1559                         return 0;
1560                 }
1561
1562                 return self::storeForUserByUriId($uri_id, $uid, ['causer-id' => $causer, 'post-reason' => self::PR_FETCHED], $origin_uid);
1563         }
1564
1565         /**
1566          * Returns the origin uid of a post if the given user is allowed to see it.
1567          *
1568          * @param int $uriid
1569          * @param int $uid
1570          * @return int
1571          */
1572         private static function GetOriginUidForUriId(int $uriid, int $uid)
1573         {
1574                 if (Post::exists(['uri-id' => $uriid, 'uid' => $uid])) {
1575                         return $uid;
1576                 }
1577
1578                 $post = Post::selectFirst(['uid', 'allow_cid', 'allow_gid', 'deny_cid', 'deny_gid', 'private'], ['uri-id' => $uriid, 'origin' => true]);
1579                 if (!empty($post)) {
1580                         if (in_array($post['private'], [Item::PUBLIC, Item::UNLISTED])) {
1581                                 return $post['uid'];
1582                         }
1583
1584                         $pcid = Contact::getPublicIdByUserId($uid);
1585                         if (empty($pcid)) {
1586                                 return null;
1587                         }
1588
1589                         foreach (Item::enumeratePermissions($post, true) as $receiver) {
1590                                 if ($receiver == $pcid) {
1591                                         return $post['uid'];
1592                                 }
1593                         }
1594
1595                         return null;
1596                 }
1597
1598                 if (Post::exists(['uri-id' => $uriid, 'uid' => 0])) {
1599                         return 0;
1600                 }
1601
1602                 // When the post belongs to a a forum then all forum users are allowed to access it
1603                 foreach (Tag::getByURIId($uriid, [Tag::MENTION, Tag::EXCLUSIVE_MENTION]) as $tag) {
1604                         if (DBA::exists('contact', ['uid' => $uid, 'nurl' => Strings::normaliseLink($tag['url']), 'contact-type' => Contact::TYPE_COMMUNITY])) {
1605                                 $target_uid = User::getIdForURL($tag['url']);
1606                                 if (!empty($target_uid)) {
1607                                         return $target_uid;
1608                                 }
1609                         }
1610                 }
1611
1612                 return null;
1613         }
1614
1615         /**
1616          * Store a public item array for the given users
1617          *
1618          * @param array   $item   The item entry that will be stored
1619          * @param integer $uid    The user that will receive the item entry
1620          * @return integer stored item id
1621          * @throws \Exception
1622          */
1623         private static function storeForUser(array $item, int $uid): int
1624         {
1625                 $post = Post::selectFirst(['id'], ['uri-id' => $item['uri-id'], 'uid' => $uid]);
1626                 if (!empty($post['id'])) {
1627                         if (!empty($item['event-id'])) {
1628                                 $post = Post::selectFirst(['event-id'], ['uri-id' => $item['uri-id'], 'uid' => $uid]);
1629                                 if (!empty($post['event-id'])) {
1630                                         $event = DBA::selectFirst('event', ['edited', 'start', 'finish', 'summary', 'desc', 'location', 'nofinish', 'adjust'], ['id' => $item['event-id']]);
1631                                         if (!empty($event)) {
1632                                                 // We aren't using "Event::store" here, since we don't want to trigger any further action
1633                                                 $ret = DBA::update('event', $event, ['id' => $post['event-id']]);
1634                                                 Logger::info('Event updated', ['uid' => $uid, 'source-event' => $item['event-id'], 'target-event' => $post['event-id'], 'ret' => $ret]);
1635                                         }
1636                                 }
1637                         }
1638                         Logger::info('Item already exists', ['uri-id' => $item['uri-id'], 'uid' => $uid, 'id' => $post['id']]);
1639                         return $post['id'];
1640                 }
1641
1642                 // Data from the "post-user" table
1643                 unset($item['id']);
1644                 unset($item['mention']);
1645                 unset($item['starred']);
1646                 unset($item['unseen']);
1647                 unset($item['psid']);
1648                 unset($item['pinned']);
1649                 unset($item['ignored']);
1650                 unset($item['pubmail']);
1651                 unset($item['event-id']);
1652                 unset($item['hidden']);
1653                 unset($item['notification-type']);
1654
1655                 // Data from the "post-delivery-data" table
1656                 unset($item['postopts']);
1657                 unset($item['inform']);
1658
1659                 $item['uid'] = $uid;
1660                 $item['origin'] = 0;
1661                 $item['wall'] = 0;
1662
1663                 if (!empty($item['causer-id']) && Contact::isSharing($item['causer-id'], $uid, true)) {
1664                         $cdata = Contact::getPublicAndUserContactID($item['causer-id'], $uid);
1665                         $contact_id = $cdata['user'] ?? 0;
1666                 }
1667
1668                 if (empty($contact_id)) {
1669                         if ($item['gravity'] == GRAVITY_PARENT) {
1670                                 if (Contact::isSharingByURL($item['owner-link'], $uid, true)) {
1671                                         $contact_id = Contact::getIdForURL($item['owner-link'], $uid);
1672                                 } else {
1673                                         $contact_id = Contact::getIdForURL($item['owner-link']);
1674                                 }
1675                         } else {
1676                                 if (Contact::isSharingByURL($item['author-link'], $uid, true)) {
1677                                         $contact_id = Contact::getIdForURL($item['author-link'], $uid);
1678                                 } else {
1679                                         $contact_id = Contact::getIdForURL($item['author-link']);
1680                                 }
1681                         }
1682                 }
1683
1684                 if (empty($contact_id)) {
1685                         Logger::warning('contact-id could not be fetched, using self contact instead.', ['uid' => $uid, 'item' => $item]);
1686                         $self = Contact::selectFirst(['id'], ['self' => true, 'uid' => $uid]);
1687                         $contact_id = $self['id'];
1688                 }
1689
1690                 $item['contact-id'] = $contact_id;
1691
1692                 $notify = false;
1693                 if ($item['gravity'] == GRAVITY_PARENT) {
1694                         $contact = DBA::selectFirst('contact', [], ['id' => $item['contact-id'], 'self' => false]);
1695                         if (DBA::isResult($contact)) {
1696                                 $notify = self::isRemoteSelf($contact, $item);
1697                         }
1698                 }
1699
1700                 $distributed = self::insert($item, $notify);
1701
1702                 if (!$distributed) {
1703                         Logger::info("Distributed item wasn't stored", ['uri-id' => $item['uri-id'], 'user' => $uid]);
1704                 } else {
1705                         Logger::info('Distributed item was stored', ['uri-id' => $item['uri-id'], 'user' => $uid, 'stored' => $distributed]);
1706                 }
1707                 return $distributed;
1708         }
1709
1710         /**
1711          * Add a shadow entry for a given item id that is a thread starter
1712          *
1713          * We store every public item entry additionally with the user id "0".
1714          * This is used for the community page and for the search.
1715          * It is planned that in the future we will store public item entries only once.
1716          *
1717          * @param integer $itemid Item ID that should be added
1718          * @throws \Exception
1719          */
1720         private static function addShadow(int $itemid)
1721         {
1722                 $fields = ['uid', 'private', 'visible', 'deleted', 'network', 'uri-id'];
1723                 $condition = ['id' => $itemid, 'gravity' => GRAVITY_PARENT];
1724                 $item = Post::selectFirst($fields, $condition);
1725
1726                 if (!DBA::isResult($item)) {
1727                         return;
1728                 }
1729
1730                 // is it already a copy?
1731                 if (($itemid == 0) || ($item['uid'] == 0)) {
1732                         return;
1733                 }
1734
1735                 // Is it a visible public post?
1736                 if (!$item["visible"] || $item["deleted"]  || ($item["private"] == self::PRIVATE)) {
1737                         return;
1738                 }
1739
1740                 // is it an entry from a connector? Only add an entry for natively connected networks
1741                 if (!in_array($item["network"], array_merge(Protocol::FEDERATED ,['']))) {
1742                         return;
1743                 }
1744
1745                 if (Post::exists(['uri-id' => $item['uri-id'], 'uid' => 0])) {
1746                         return;
1747                 }
1748
1749                 $item = Post::selectFirst(array_merge(self::ITEM_FIELDLIST, ['protocol']), ['id' => $itemid]);
1750
1751                 if (DBA::isResult($item)) {
1752                         // Preparing public shadow (removing user specific data)
1753                         $item['uid'] = 0;
1754                         unset($item['id']);
1755                         unset($item['parent']);
1756                         unset($item['wall']);
1757                         unset($item['mention']);
1758                         unset($item['origin']);
1759                         unset($item['starred']);
1760                         unset($item['postopts']);
1761                         unset($item['inform']);
1762                         unset($item['post-reason']);
1763                         if ($item['uri-id'] == $item['parent-uri-id']) {
1764                                 $item['contact-id'] = $item['owner-id'];
1765                         } else {
1766                                 $item['contact-id'] = $item['author-id'];
1767                         }
1768
1769                         $public_shadow = self::insert($item);
1770
1771                         Logger::info('Stored public shadow', ['thread' => $itemid, 'id' => $public_shadow]);
1772                 }
1773         }
1774
1775         /**
1776          * Add a shadow entry for a given item id that is a comment
1777          *
1778          * This function does the same like the function above - but for comments
1779          *
1780          * @param integer $itemid Item ID that should be added
1781          * @throws \Exception
1782          */
1783         private static function addShadowPost(int $itemid)
1784         {
1785                 $item = Post::selectFirst(array_merge(self::ITEM_FIELDLIST, ['protocol']), ['id' => $itemid]);
1786                 if (!DBA::isResult($item)) {
1787                         return;
1788                 }
1789
1790                 // Is it a toplevel post?
1791                 if ($item['gravity'] == GRAVITY_PARENT) {
1792                         self::addShadow($itemid);
1793                         return;
1794                 }
1795
1796                 // Is this a shadow entry?
1797                 if ($item['uid'] == 0) {
1798                         return;
1799                 }
1800
1801                 // Is there a shadow parent?
1802                 if (!Post::exists(['uri-id' => $item['parent-uri-id'], 'uid' => 0])) {
1803                         return;
1804                 }
1805
1806                 // Is there already a shadow entry?
1807                 if (Post::exists(['uri-id' => $item['uri-id'], 'uid' => 0])) {
1808                         return;
1809                 }
1810
1811                 // Save "origin" and "parent" state
1812                 $origin = $item['origin'];
1813                 $parent = $item['parent'];
1814
1815                 // Preparing public shadow (removing user specific data)
1816                 $item['uid'] = 0;
1817                 unset($item['id']);
1818                 unset($item['parent']);
1819                 unset($item['wall']);
1820                 unset($item['mention']);
1821                 unset($item['origin']);
1822                 unset($item['starred']);
1823                 unset($item['postopts']);
1824                 unset($item['inform']);
1825                 unset($item['post-reason']);
1826                 $item['contact-id'] = Contact::getIdForURL($item['author-link']);
1827
1828                 $public_shadow = self::insert($item);
1829
1830                 Logger::info('Stored public shadow', ['uri-id' => $item['uri-id'], 'id' => $public_shadow]);
1831
1832                 // If this was a comment to a Diaspora post we don't get our comment back.
1833                 // This means that we have to distribute the comment by ourselves.
1834                 if ($origin && Post::exists(['id' => $parent, 'network' => Protocol::DIASPORA])) {
1835                         self::distribute($public_shadow);
1836                 }
1837         }
1838
1839         /**
1840          * Adds a language specification in a "language" element of given $arr.
1841          * Expects "body" element to exist in $arr.
1842          *
1843          * @param array $item
1844          * @return string detected language
1845          * @throws \Text_LanguageDetect_Exception
1846          */
1847         private static function getLanguage(array $item): string
1848         {
1849                 if (!empty($item['language'])) {
1850                         return $item['language'];
1851                 }
1852
1853                 if (!in_array($item['gravity'], [GRAVITY_PARENT, GRAVITY_COMMENT]) || empty($item['body'])) {
1854                         return '';
1855                 }
1856
1857                 // Convert attachments to links
1858                 $naked_body = BBCode::removeAttachment($item['body']);
1859                 if (empty($naked_body)) {
1860                         return '';
1861                 }
1862
1863                 // Remove links and pictures
1864                 $naked_body = BBCode::removeLinks($naked_body);
1865
1866                 // Convert the title and the body to plain text
1867                 $naked_body = trim($item['title'] . "\n" . BBCode::toPlaintext($naked_body));
1868
1869                 // Remove possibly remaining links
1870                 $naked_body = preg_replace(Strings::autoLinkRegEx(), '', $naked_body);
1871
1872                 if (empty($naked_body)) {
1873                         return '';
1874                 }
1875
1876                 $availableLanguages = DI::l10n()->getAvailableLanguages();
1877                 // See https://github.com/friendica/friendica/issues/10511
1878                 // Persian is manually added to language detection until a persian translation is provided for the interface, at
1879                 // which point it will be automatically available through `getAvailableLanguages()` and this should be removed.
1880                 $availableLanguages['fa'] = 'fa';
1881
1882                 $ld = new Language(array_keys($availableLanguages));
1883                 $languages = $ld->detect($naked_body)->limit(0, 3)->close();
1884                 if (is_array($languages)) {
1885                         return json_encode($languages);
1886                 }
1887
1888                 return '';
1889         }
1890
1891         public static function getLanguageMessage(array $item): string
1892         {
1893                 $iso639 = new \Matriphe\ISO639\ISO639;
1894
1895                 $used_languages = '';
1896                 foreach (json_decode($item['language'], true) as $language => $reliability) {
1897                         $used_languages .= $iso639->languageByCode1($language) . ' (' . $language . "): " . number_format($reliability, 5) . '\n';
1898                 }
1899                 $used_languages = DI::l10n()->t('Detected languages in this post:\n%s', $used_languages);
1900                 return $used_languages;
1901         }
1902
1903         /**
1904          * Creates an unique guid out of a given uri.
1905          * This function is used for messages outside the fediverse (Connector posts, feeds, Mails, ...)
1906          * Posts that are created on this system are using System::createUUID.
1907          * Received ActivityPub posts are using Processor::getGUIDByURL.
1908          *
1909          * @param string      $uri uri of an item entry
1910          * @param string|null $host hostname for the GUID prefix
1911          * @return string Unique guid
1912          */
1913         public static function guidFromUri(string $uri, string $host = null): string
1914         {
1915                 // Our regular guid routine is using this kind of prefix as well
1916                 // We have to avoid that different routines could accidentally create the same value
1917                 $parsed = parse_url($uri);
1918
1919                 // Remove the scheme to make sure that "https" and "http" doesn't make a difference
1920                 unset($parsed['scheme']);
1921
1922                 // Glue it together to be able to make a hash from it
1923                 $host_id = implode('/', $parsed);
1924
1925                 // Use a mixture of several hashes to provide some GUID like experience
1926                 return hash('crc32', $host) . '-'. hash('joaat', $host_id) . '-'. hash('fnv164', $host_id);
1927         }
1928
1929         /**
1930          * generate an unique URI
1931          *
1932          * @param string $guid An existing GUID (Otherwise it will be generated)
1933          *
1934          * @return string
1935          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1936          */
1937         public static function newURI(string $guid = ''): string
1938         {
1939                 if ($guid == '') {
1940                         $guid = System::createUUID();
1941                 }
1942
1943                 return DI::baseUrl()->get() . '/objects/' . $guid;
1944         }
1945
1946         /**
1947          * Set "success_update" and "last-item" to the date of the last time we heard from this contact
1948          *
1949          * This can be used to filter for inactive contacts.
1950          * Only do this for public postings to avoid privacy problems, since poco data is public.
1951          * Don't set this value if it isn't from the owner (could be an author that we don't know)
1952          *
1953          * @param array $arr Contains the just posted item record
1954          * @throws \Exception
1955          */
1956         private static function updateContact(array $arr)
1957         {
1958                 // Unarchive the author
1959                 $contact = DBA::selectFirst('contact', [], ['id' => $arr["author-id"]]);
1960                 if (DBA::isResult($contact)) {
1961                         Contact::unmarkForArchival($contact);
1962                 }
1963
1964                 // Unarchive the contact if it's not our own contact
1965                 $contact = DBA::selectFirst('contact', [], ['id' => $arr["contact-id"], 'self' => false]);
1966                 if (DBA::isResult($contact)) {
1967                         Contact::unmarkForArchival($contact);
1968                 }
1969
1970                 /// @todo On private posts we could obfuscate the date
1971                 $update = ($arr['private'] != self::PRIVATE) || in_array($arr['network'], Protocol::FEDERATED);
1972
1973                 // Is it a forum? Then we don't care about the rules from above
1974                 if (!$update && in_array($arr["network"], [Protocol::ACTIVITYPUB, Protocol::DFRN]) && ($arr["parent-uri-id"] === $arr["uri-id"])) {
1975                         if (DBA::exists('contact', ['id' => $arr['contact-id'], 'forum' => true])) {
1976                                 $update = true;
1977                         }
1978                 }
1979
1980                 if ($update) {
1981                         // The "self" contact id is used (for example in the connectors) when the contact is unknown
1982                         // So we have to ensure to only update the last item when it had been our own post,
1983                         // or it had been done by a "regular" contact.
1984                         if (!empty($arr['wall'])) {
1985                                 $condition = ['id' => $arr['contact-id']];
1986                         } else {
1987                                 $condition = ['id' => $arr['contact-id'], 'self' => false];
1988                         }
1989                         Contact::update(['failed' => false, 'local-data' => true, 'success_update' => $arr['received'], 'last-item' => $arr['received']], $condition);
1990                 }
1991                 // Now do the same for the system wide contacts with uid=0
1992                 if ($arr['private'] != self::PRIVATE) {
1993                         Contact::update(['failed' => false, 'local-data' => true, 'success_update' => $arr['received'], 'last-item' => $arr['received']],
1994                                 ['id' => $arr['owner-id']]);
1995
1996                         if ($arr['owner-id'] != $arr['author-id']) {
1997                                 Contact::update(['failed' => false, 'local-data' => true, 'success_update' => $arr['received'], 'last-item' => $arr['received']],
1998                                         ['id' => $arr['author-id']]);
1999                         }
2000                 }
2001         }
2002
2003         public static function setHashtags(string $body): string
2004         {
2005                 $body = BBCode::performWithEscapedTags($body, ['noparse', 'pre', 'code', 'img'], function ($body) {
2006                         $tags = BBCode::getTags($body);
2007
2008                         // No hashtags?
2009                         if (!count($tags)) {
2010                                 return $body;
2011                         }
2012
2013                         // This sorting is important when there are hashtags that are part of other hashtags
2014                         // Otherwise there could be problems with hashtags like #test and #test2
2015                         // Because of this we are sorting from the longest to the shortest tag.
2016                         usort($tags, function ($a, $b) {
2017                                 return strlen($b) <=> strlen($a);
2018                         });
2019
2020                         $URLSearchString = "^\[\]";
2021
2022                         // All hashtags should point to the home server if "local_tags" is activated
2023                         if (DI::config()->get('system', 'local_tags')) {
2024                                 $body = preg_replace("/#\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",
2025                                         "#[url=" . DI::baseUrl() . "/search?tag=$2]$2[/url]", $body);
2026                         }
2027
2028                         // mask hashtags inside of url, bookmarks and attachments to avoid urls in urls
2029                         $body = preg_replace_callback("/\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",
2030                                 function ($match) {
2031                                         return ("[url=" . str_replace("#", "&num;", $match[1]) . "]" . str_replace("#", "&num;", $match[2]) . "[/url]");
2032                                 }, $body);
2033
2034                         $body = preg_replace_callback("/\[bookmark\=([$URLSearchString]*)\](.*?)\[\/bookmark\]/ism",
2035                                 function ($match) {
2036                                         return ("[bookmark=" . str_replace("#", "&num;", $match[1]) . "]" . str_replace("#", "&num;", $match[2]) . "[/bookmark]");
2037                                 }, $body);
2038
2039                         $body = preg_replace_callback("/\[attachment (.*?)\](.*?)\[\/attachment\]/ism",
2040                                 function ($match) {
2041                                         return ("[attachment " . str_replace("#", "&num;", $match[1]) . "]" . $match[2] . "[/attachment]");
2042                                 }, $body);
2043
2044                         // Repair recursive urls
2045                         $body = preg_replace("/&num;\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",
2046                                 "&num;$2", $body);
2047
2048                         foreach ($tags as $tag) {
2049                                 if ((strpos($tag, '#') !== 0) || strpos($tag, '[url=') || strlen($tag) < 2 || $tag[1] == '#') {
2050                                         continue;
2051                                 }
2052
2053                                 $basetag = str_replace('_', ' ', substr($tag, 1));
2054                                 $newtag = '#[url=' . DI::baseUrl() . '/search?tag=' . $basetag . ']' . $basetag . '[/url]';
2055
2056                                 $body = str_replace($tag, $newtag, $body);
2057                         }
2058
2059                         // Convert back the masked hashtags
2060                         $body = str_replace("&num;", "#", $body);
2061
2062                         return $body;
2063                 });
2064
2065                 return $body;
2066         }
2067
2068         /**
2069          * look for mention tags and setup a second delivery chain for forum/community posts if appropriate
2070          *
2071          * @param int $uid
2072          * @param int $item_id
2073          * @return boolean true if item was deleted, else false
2074          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
2075          * @throws \ImagickException
2076          */
2077         private static function tagDeliver(int $uid, int $item_id): bool
2078         {
2079                 $mention = false;
2080
2081                 $owner = User::getOwnerDataById($uid);
2082                 if (!DBA::isResult($owner)) {
2083                         Logger::warning('User not found, quitting here.', ['uid' => $uid]);
2084                         return false;
2085                 }
2086
2087                 if ($owner['contact-type'] != User::ACCOUNT_TYPE_COMMUNITY) {
2088                         Logger::debug('Owner is no community, quitting here.', ['uid' => $uid, 'id' => $item_id]);
2089                         return false;
2090                 }
2091
2092                 $item = Post::selectFirst(self::ITEM_FIELDLIST, ['id' => $item_id, 'gravity' => [GRAVITY_PARENT, GRAVITY_COMMENT], 'origin' => false]);
2093                 if (!DBA::isResult($item)) {
2094                         Logger::debug('Post is an activity or origin or not found at all, quitting here.', ['id' => $item_id]);
2095                         return false;
2096                 }
2097
2098                 if ($item['gravity'] == GRAVITY_PARENT) {
2099                         if (Tag::isMentioned($item['uri-id'], $owner['url'])) {
2100                                 Logger::info('Mention found in tag.', ['uri' => $item['uri'], 'uid' => $uid, 'id' => $item_id, 'uri-id' => $item['uri-id'], 'guid' => $item['guid']]);
2101                         } else {
2102                                 Logger::info('Top-level post without mention is deleted.', ['uri' => $item['uri'], $uid, 'id' => $item_id, 'uri-id' => $item['uri-id'], 'guid' => $item['guid']]);
2103                                 Post\User::delete(['uri-id' => $item['uri-id'], 'uid' => $item['uid']]);
2104                                 return true;
2105                         }
2106
2107                         $arr = ['item' => $item, 'user' => $owner];
2108
2109                         Hook::callAll('tagged', $arr);
2110                 } else {
2111                         if (Tag::isMentioned($item['parent-uri-id'], $owner['url'])) {
2112                                 Logger::info('Mention found in parent tag.', ['uri' => $item['uri'], 'uid' => $uid, 'id' => $item_id, 'uri-id' => $item['uri-id'], 'guid' => $item['guid']]);
2113                         } else {
2114                                 Logger::debug('No mentions found in parent, quitting here.', ['id' => $item_id, 'uri-id' => $item['uri-id'], 'guid' => $item['guid']]);
2115                                 return false;
2116                         }
2117                 }
2118
2119                 Logger::info('Community post will be distributed', ['uri' => $item['uri'], 'uid' => $uid, 'id' => $item_id, 'uri-id' => $item['uri-id'], 'guid' => $item['guid']]);
2120
2121                 if ($owner['page-flags'] == User::PAGE_FLAGS_PRVGROUP) {
2122                         $allow_cid = '';
2123                         $allow_gid = '<' . Group::FOLLOWERS . '>';
2124                         $deny_cid  = '';
2125                         $deny_gid  = '';
2126                         self::performActivity($item['id'], 'announce', $uid, $allow_cid, $allow_gid, $deny_cid, $deny_gid);
2127                 } else {
2128                         self::performActivity($item['id'], 'announce', $uid);
2129                 }
2130
2131                 Logger::info('Community post had been distributed', ['uri' => $item['uri'], 'uid' => $uid, 'id' => $item_id, 'uri-id' => $item['uri-id'], 'guid' => $item['guid']]);
2132                 return false;
2133         }
2134
2135         /**
2136          * Automatically reshare the item if the "remote_self" option is selected
2137          *
2138          * @param array $item
2139          * @return void
2140          */
2141         private static function autoReshare(array $item)
2142         {
2143                 if ($item['gravity'] != GRAVITY_PARENT) {
2144                         return;
2145                 }
2146
2147                 if (!DBA::exists('contact', ['id' => $item['contact-id'], 'remote_self' => Contact::MIRROR_NATIVE_RESHARE])) {
2148                         return;
2149                 }
2150
2151                 if (!in_array($item['network'], [Protocol::ACTIVITYPUB, Protocol::DFRN])) {
2152                         return;
2153                 }
2154
2155                 Logger::info('Automatically reshare item', ['uid' => $item['uid'], 'id' => $item['id'], 'guid' => $item['guid'], 'uri-id' => $item['uri-id']]);
2156
2157                 self::performActivity($item['id'], 'announce', $item['uid']);
2158         }
2159
2160         public static function isRemoteSelf(array $contact, array &$datarray): bool
2161         {
2162                 if (!$contact['remote_self']) {
2163                         return false;
2164                 }
2165
2166                 // Prevent the forwarding of posts that are forwarded
2167                 if (!empty($datarray["extid"]) && ($datarray["extid"] == Protocol::DFRN)) {
2168                         Logger::info('Already forwarded');
2169                         return false;
2170                 }
2171
2172                 // Prevent to forward already forwarded posts
2173                 if ($datarray["app"] == DI::baseUrl()->getHostname()) {
2174                         Logger::info('Already forwarded (second test)');
2175                         return false;
2176                 }
2177
2178                 // Only forward posts
2179                 if ($datarray["verb"] != Activity::POST) {
2180                         Logger::info('No post');
2181                         return false;
2182                 }
2183
2184                 if (($contact['network'] != Protocol::FEED) && ($datarray['private'] == self::PRIVATE)) {
2185                         Logger::info('Not public');
2186                         return false;
2187                 }
2188
2189                 $datarray2 = $datarray;
2190                 Logger::info('remote-self start', ['contact' => $contact['url'], 'remote_self'=> $contact['remote_self'], 'item' => $datarray]);
2191                 if ($contact['remote_self'] == Contact::MIRROR_OWN_POST) {
2192                         $self = DBA::selectFirst('contact', ['id', 'name', 'url', 'thumb'],
2193                                         ['uid' => $contact['uid'], 'self' => true]);
2194                         if (DBA::isResult($self)) {
2195                                 $datarray['contact-id'] = $self["id"];
2196
2197                                 $datarray['owner-name'] = $self["name"];
2198                                 $datarray['owner-link'] = $self["url"];
2199                                 $datarray['owner-avatar'] = $self["thumb"];
2200
2201                                 $datarray['author-name']   = $datarray['owner-name'];
2202                                 $datarray['author-link']   = $datarray['owner-link'];
2203                                 $datarray['author-avatar'] = $datarray['owner-avatar'];
2204
2205                                 unset($datarray['edited']);
2206
2207                                 unset($datarray['network']);
2208                                 unset($datarray['owner-id']);
2209                                 unset($datarray['author-id']);
2210                         }
2211
2212                         if ($contact['network'] != Protocol::FEED) {
2213                                 $old_uri_id = $datarray["uri-id"] ?? 0;
2214                                 $datarray["guid"] = System::createUUID();
2215                                 unset($datarray["plink"]);
2216                                 $datarray["uri"] = self::newURI($datarray["guid"]);
2217                                 $datarray["uri-id"] = ItemURI::getIdByURI($datarray["uri"]);
2218                                 $datarray["extid"] = Protocol::DFRN;
2219                                 $urlpart = parse_url($datarray2['author-link']);
2220                                 $datarray["app"] = $urlpart["host"];
2221                                 if (!empty($old_uri_id)) {
2222                                         Post\Media::copy($old_uri_id, $datarray["uri-id"]);
2223                                 }
2224
2225                                 unset($datarray["parent-uri"]);
2226                                 unset($datarray["thr-parent"]);
2227                         } else {
2228                                 $datarray['private'] = self::PUBLIC;
2229                         }
2230                 }
2231
2232                 if ($contact['network'] != Protocol::FEED) {
2233                         // Store the original post
2234                         $result = self::insert($datarray2);
2235                         Logger::info('remote-self post original item', ['contact' => $contact['url'], 'result'=> $result, 'item' => $datarray2]);
2236                 } else {
2237                         $datarray["app"] = "Feed";
2238                         $result = true;
2239                 }
2240
2241                 return (bool)$result;
2242         }
2243
2244         /**
2245          *
2246          * @param string $s
2247          * @param int    $uid
2248          * @param array  $item
2249          * @param int    $cid
2250          * @return string
2251          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
2252          * @throws \ImagickException
2253          */
2254         public static function fixPrivatePhotos(string $s, int $uid, array $item = null, int $cid = 0): string
2255         {
2256                 if (DI::config()->get('system', 'disable_embedded')) {
2257                         return $s;
2258                 }
2259
2260                 Logger::info('check for photos');
2261                 $site = substr(DI::baseUrl(), strpos(DI::baseUrl(), '://'));
2262
2263                 $orig_body = $s;
2264                 $new_body = '';
2265
2266                 $img_start = strpos($orig_body, '[img');
2267                 $img_st_close = ($img_start !== false ? strpos(substr($orig_body, $img_start), ']') : false);
2268                 $img_len = ($img_start !== false ? strpos(substr($orig_body, $img_start + $img_st_close + 1), '[/img]') : false);
2269
2270                 while (($img_st_close !== false) && ($img_len !== false)) {
2271                         $img_st_close++; // make it point to AFTER the closing bracket
2272                         $image = substr($orig_body, $img_start + $img_st_close, $img_len);
2273
2274                         Logger::info('found photo', ['image' => $image]);
2275
2276                         if (stristr($image, $site . '/photo/')) {
2277                                 // Only embed locally hosted photos
2278                                 $replace = false;
2279                                 $i = basename($image);
2280                                 $i = str_replace(['.jpg', '.png', '.gif'], ['', '', ''], $i);
2281                                 $x = strpos($i, '-');
2282
2283                                 if ($x) {
2284                                         $res = substr($i, $x + 1);
2285                                         $i = substr($i, 0, $x);
2286                                         $photo = Photo::getPhotoForUser($uid, $i, $res);
2287                                         if (DBA::isResult($photo)) {
2288                                                 /*
2289                                                  * Check to see if we should replace this photo link with an embedded image
2290                                                  * 1. No need to do so if the photo is public
2291                                                  * 2. If there's a contact-id provided, see if they're in the access list
2292                                                  *    for the photo. If so, embed it.
2293                                                  * 3. Otherwise, if we have an item, see if the item permissions match the photo
2294                                                  *    permissions, regardless of order but first check to see if they're an exact
2295                                                  *    match to save some processing overhead.
2296                                                  */
2297                                                 if (self::hasPermissions($photo)) {
2298                                                         if ($cid) {
2299                                                                 $recips = self::enumeratePermissions($photo);
2300                                                                 if (in_array($cid, $recips)) {
2301                                                                         $replace = true;
2302                                                                 }
2303                                                         } elseif ($item) {
2304                                                                 if (self::samePermissions($uid, $item, $photo)) {
2305                                                                         $replace = true;
2306                                                                 }
2307                                                         }
2308                                                 }
2309                                                 if ($replace) {
2310                                                         $photo_img = Photo::getImageForPhoto($photo);
2311                                                         // If a custom width and height were specified, apply before embedding
2312                                                         if (preg_match("/\[img\=([0-9]*)x([0-9]*)\]/is", substr($orig_body, $img_start, $img_st_close), $match)) {
2313                                                                 Logger::info('scaling photo');
2314
2315                                                                 $width = intval($match[1]);
2316                                                                 $height = intval($match[2]);
2317
2318                                                                 $photo_img->scaleDown(max($width, $height));
2319                                                         }
2320
2321                                                         $data = $photo_img->asString();
2322                                                         $type = $photo_img->getType();
2323
2324                                                         Logger::info('replacing photo');
2325                                                         $image = 'data:' . $type . ';base64,' . base64_encode($data);
2326                                                         Logger::debug('replaced', ['image' => $image]);
2327                                                 }
2328                                         }
2329                                 }
2330                         }
2331
2332                         $new_body = $new_body . substr($orig_body, 0, $img_start + $img_st_close) . $image . '[/img]';
2333                         $orig_body = substr($orig_body, $img_start + $img_st_close + $img_len + strlen('[/img]'));
2334                         if ($orig_body === false) {
2335                                 $orig_body = '';
2336                         }
2337
2338                         $img_start = strpos($orig_body, '[img');
2339                         $img_st_close = ($img_start !== false ? strpos(substr($orig_body, $img_start), ']') : false);
2340                         $img_len = ($img_start !== false ? strpos(substr($orig_body, $img_start + $img_st_close + 1), '[/img]') : false);
2341                 }
2342
2343                 $new_body = $new_body . $orig_body;
2344
2345                 return $new_body;
2346         }
2347
2348         private static function hasPermissions(array $obj)
2349         {
2350                 return !empty($obj['allow_cid']) || !empty($obj['allow_gid']) ||
2351                         !empty($obj['deny_cid']) || !empty($obj['deny_gid']);
2352         }
2353
2354         // @TODO $uid is unused parameter
2355         private static function samePermissions($uid, array $obj1, array $obj2): bool
2356         {
2357                 // first part is easy. Check that these are exactly the same.
2358                 if (($obj1['allow_cid'] == $obj2['allow_cid'])
2359                         && ($obj1['allow_gid'] == $obj2['allow_gid'])
2360                         && ($obj1['deny_cid'] == $obj2['deny_cid'])
2361                         && ($obj1['deny_gid'] == $obj2['deny_gid'])) {
2362                         return true;
2363                 }
2364
2365                 // This is harder. Parse all the permissions and compare the resulting set.
2366                 $recipients1 = self::enumeratePermissions($obj1);
2367                 $recipients2 = self::enumeratePermissions($obj2);
2368                 sort($recipients1);
2369                 sort($recipients2);
2370
2371                 /// @TODO Comparison of arrays, maybe use array_diff_assoc() here?
2372                 return ($recipients1 == $recipients2);
2373         }
2374
2375         /**
2376          * Returns an array of contact-ids that are allowed to see this object
2377          *
2378          * @param array $obj        Item array with at least uid, allow_cid, allow_gid, deny_cid and deny_gid
2379          * @param bool  $check_dead Prunes unavailable contacts from the result
2380          * @return array
2381          * @throws \Exception
2382          */
2383         public static function enumeratePermissions(array $obj, bool $check_dead = false): array
2384         {
2385                 $aclFormater = DI::aclFormatter();
2386
2387                 $allow_people = $aclFormater->expand($obj['allow_cid']);
2388                 $allow_groups = Group::expand($obj['uid'], $aclFormater->expand($obj['allow_gid']), $check_dead);
2389                 $deny_people  = $aclFormater->expand($obj['deny_cid']);
2390                 $deny_groups  = Group::expand($obj['uid'], $aclFormater->expand($obj['deny_gid']), $check_dead);
2391                 $recipients   = array_unique(array_merge($allow_people, $allow_groups));
2392                 $deny         = array_unique(array_merge($deny_people, $deny_groups));
2393                 $recipients   = array_diff($recipients, $deny);
2394                 return $recipients;
2395         }
2396
2397         public static function expire(int $uid, int $days, string $network = "", bool $force = false)
2398         {
2399                 if (!$uid || ($days < 1)) {
2400                         return;
2401                 }
2402
2403                 $condition = ["`uid` = ? AND NOT `deleted` AND `gravity` = ?",
2404                         $uid, GRAVITY_PARENT];
2405
2406                 /*
2407                  * $expire_network_only = save your own wall posts
2408                  * and just expire conversations started by others
2409                  */
2410                 $expire_network_only = DI::pConfig()->get($uid, 'expire', 'network_only', false);
2411
2412                 if ($expire_network_only) {
2413                         $condition[0] .= " AND NOT `wall`";
2414                 }
2415
2416                 if ($network != "") {
2417                         $condition[0] .= " AND `network` = ?";
2418                         $condition[] = $network;
2419                 }
2420
2421                 $condition[0] .= " AND `received` < ?";
2422                 $condition[] = DateTimeFormat::utc('now - ' . $days . ' day');
2423
2424                 $items = Post::select(['resource-id', 'starred', 'id', 'post-type', 'uid', 'uri-id'], $condition);
2425
2426                 if (!DBA::isResult($items)) {
2427                         return;
2428                 }
2429
2430                 $expire_items = DI::pConfig()->get($uid, 'expire', 'items', true);
2431
2432                 // Forcing expiring of items - but not notes and marked items
2433                 if ($force) {
2434                         $expire_items = true;
2435                 }
2436
2437                 $expire_notes = DI::pConfig()->get($uid, 'expire', 'notes', true);
2438                 $expire_starred = DI::pConfig()->get($uid, 'expire', 'starred', true);
2439                 $expire_photos = DI::pConfig()->get($uid, 'expire', 'photos', false);
2440
2441                 $expired = 0;
2442
2443                 $priority = DI::config()->get('system', 'expire-notify-priority');
2444
2445                 while ($item = Post::fetch($items)) {
2446                         // don't expire filed items
2447                         if (DBA::exists('post-category', ['uri-id' => $item['uri-id'], 'uid' => $item['uid'], 'type' => Post\Category::FILE])) {
2448                                 continue;
2449                         }
2450
2451                         // Only expire posts, not photos and photo comments
2452
2453                         if (!$expire_photos && !empty($item['resource-id'])) {
2454                                 continue;
2455                         } elseif (!$expire_starred && intval($item['starred'])) {
2456                                 continue;
2457                         } elseif (!$expire_notes && ($item['post-type'] == self::PT_PERSONAL_NOTE)) {
2458                                 continue;
2459                         } elseif (!$expire_items && ($item['post-type'] != self::PT_PERSONAL_NOTE)) {
2460                                 continue;
2461                         }
2462
2463                         self::markForDeletionById($item['id'], $priority);
2464
2465                         ++$expired;
2466                 }
2467                 DBA::close($items);
2468                 Logger::notice('User ' . $uid . ": expired $expired items; expire items: $expire_items, expire notes: $expire_notes, expire starred: $expire_starred, expire photos: $expire_photos");
2469         }
2470
2471         public static function firstPostDate(int $uid, bool $wall = false)
2472         {
2473                 $user = User::getById($uid, ['register_date']);
2474                 if (empty($user)) {
2475                         return false;
2476                 }
2477
2478                 $condition = ["`uid` = ? AND `wall` = ? AND NOT `deleted` AND `visible` AND `received` >= ?",
2479                         $uid, $wall, $user['register_date']];
2480                 $params = ['order' => ['received' => false]];
2481                 $thread = Post::selectFirstThread(['received'], $condition, $params);
2482                 if (DBA::isResult($thread)) {
2483                         $postdate = substr(DateTimeFormat::local($thread['received']), 0, 10);
2484                         return $postdate;
2485                 }
2486                 return false;
2487         }
2488
2489         /**
2490          * add/remove activity to an item
2491          *
2492          * Toggle activities as like,dislike,attend of an item
2493          *
2494          * @param int    $item_id
2495          * @param string $verb
2496          *            Activity verb. One of
2497          *            like, unlike, dislike, undislike, attendyes, unattendyes,
2498          *            attendno, unattendno, attendmaybe, unattendmaybe,
2499          *            announce, unannouce
2500          * @param int    $uid
2501          * @param string $allow_cid
2502          * @param string $allow_gid
2503          * @param string $deny_cid
2504          * @param string $deny_gid
2505          * @return bool
2506          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
2507          * @throws \ImagickException
2508          * @hook  'post_local_end'
2509          *            array $arr
2510          *            'post_id' => ID of posted item
2511          */
2512         public static function performActivity(int $item_id, string $verb, int $uid, string $allow_cid = null, string $allow_gid = null, string $deny_cid = null, string $deny_gid = null): bool
2513         {
2514                 if (empty($uid)) {
2515                         return false;
2516                 }
2517
2518                 Logger::notice('Start create activity', ['verb' => $verb, 'item' => $item_id, 'user' => $uid]);
2519
2520                 $item = Post::selectFirst(self::ITEM_FIELDLIST, ['id' => $item_id]);
2521                 if (!DBA::isResult($item)) {
2522                         Logger::notice('like: unknown item', ['id' => $item_id]);
2523                         return false;
2524                 }
2525
2526                 $uri_id = $item['uri-id'];
2527
2528                 if (!in_array($item['uid'], [0, $uid])) {
2529                         return false;
2530                 }
2531
2532                 if (!Post::exists(['uri-id' => $item['parent-uri-id'], 'uid' => $uid])) {
2533                         $stored = self::storeForUserByUriId($item['parent-uri-id'], $uid, ['post-reason' => Item::PR_ACTIVITY]);
2534                         if (($item['parent-uri-id'] == $item['uri-id']) && !empty($stored)) {
2535                                 $item = Post::selectFirst(self::ITEM_FIELDLIST, ['id' => $stored]);
2536                                 if (!DBA::isResult($item)) {
2537                                         Logger::info('Could not fetch just created item - should not happen', ['stored' => $stored, 'uid' => $uid, 'uri-id' => $uri_id]);
2538                                         return false;
2539                                 }
2540                         }
2541                 }
2542
2543                 // Retrieves the local post owner
2544                 $owner = User::getOwnerDataById($uid);
2545                 if (empty($owner)) {
2546                         Logger::info('Empty owner for user', ['uid' => $uid]);
2547                         return false;
2548                 }
2549
2550                 // Retrieve the current logged in user's public contact
2551                 $author_id = Contact::getIdForURL($owner['url']);
2552                 if (empty($author_id)) {
2553                         Logger::info('Empty public contact');
2554                         return false;
2555                 }
2556
2557                 $activity = null;
2558                 switch ($verb) {
2559                         case 'like':
2560                         case 'unlike':
2561                                 $activity = Activity::LIKE;
2562                                 break;
2563                         case 'dislike':
2564                         case 'undislike':
2565                                 $activity = Activity::DISLIKE;
2566                                 break;
2567                         case 'attendyes':
2568                         case 'unattendyes':
2569                                 $activity = Activity::ATTEND;
2570                                 break;
2571                         case 'attendno':
2572                         case 'unattendno':
2573                                 $activity = Activity::ATTENDNO;
2574                                 break;
2575                         case 'attendmaybe':
2576                         case 'unattendmaybe':
2577                                 $activity = Activity::ATTENDMAYBE;
2578                                 break;
2579                         case 'follow':
2580                         case 'unfollow':
2581                                 $activity = Activity::FOLLOW;
2582                                 break;
2583                         case 'announce':
2584                         case 'unannounce':
2585                                 $activity = Activity::ANNOUNCE;
2586                                 break;
2587                         default:
2588                                 Logger::notice('unknown verb', ['verb' => $verb, 'item' => $item_id]);
2589                                 return false;
2590                 }
2591
2592                 $mode = Strings::startsWith($verb, 'un') ? 'delete' : 'create';
2593
2594                 // Enable activity toggling instead of on/off
2595                 $event_verb_flag = $activity === Activity::ATTEND || $activity === Activity::ATTENDNO || $activity === Activity::ATTENDMAYBE;
2596
2597                 // Look for an existing verb row
2598                 // Event participation activities are mutually exclusive, only one of them can exist at all times.
2599                 if ($event_verb_flag) {
2600                         $verbs = [Activity::ATTEND, Activity::ATTENDNO, Activity::ATTENDMAYBE];
2601
2602                         // Translate to the index based activity index
2603                         $vids = [];
2604                         foreach ($verbs as $verb) {
2605                                 $vids[] = Verb::getID($verb);
2606                         }
2607                 } else {
2608                         $vids = Verb::getID($activity);
2609                 }
2610
2611                 $condition = ['vid' => $vids, 'deleted' => false, 'gravity' => GRAVITY_ACTIVITY,
2612                         'author-id' => $author_id, 'uid' => $item['uid'], 'thr-parent-id' => $uri_id];
2613                 $like_item = Post::selectFirst(['id', 'guid', 'verb'], $condition);
2614
2615                 if (DBA::isResult($like_item)) {
2616                         /**
2617                          * Truth table for existing activities
2618                          *
2619                          * |          Inputs            ||      Outputs      |
2620                          * |----------------------------||-------------------|
2621                          * |  Mode  | Event | Same verb || Delete? | Return? |
2622                          * |--------|-------|-----------||---------|---------|
2623                          * | create |  Yes  |    Yes    ||   No    |   Yes   |
2624                          * | create |  Yes  |    No     ||   Yes   |   No    |
2625                          * | create |  No   |    Yes    ||   No    |   Yes   |
2626                          * | create |  No   |    No     ||        N/A†       |
2627                          * | delete |  Yes  |    Yes    ||   Yes   |   N/A‡  |
2628                          * | delete |  Yes  |    No     ||   No    |   N/A‡  |
2629                          * | delete |  No   |    Yes    ||   Yes   |   N/A‡  |
2630                          * | delete |  No   |    No     ||        N/A†       |
2631                          * |--------|-------|-----------||---------|---------|
2632                          * |   A    |   B   |     C     || A xor C | !B or C |
2633                          *
2634                          * † Can't happen: It's impossible to find an existing non-event activity without
2635                          *                 the same verb because we are only looking for this single verb.
2636                          *
2637                          * ‡ The "mode = delete" is returning early whether an existing activity was found or not.
2638                          */
2639                         if ($mode == 'create' xor $like_item['verb'] == $activity) {
2640                                 self::markForDeletionById($like_item['id']);
2641                         }
2642
2643                         if (!$event_verb_flag || $like_item['verb'] == $activity) {
2644                                 return true;
2645                         }
2646                 }
2647
2648                 // No need to go further if we aren't creating anything
2649                 if ($mode == 'delete') {
2650                         return true;
2651                 }
2652
2653                 $objtype = $item['resource-id'] ? Activity\ObjectType::IMAGE : Activity\ObjectType::NOTE;
2654
2655                 $new_item = [
2656                         'guid'          => System::createUUID(),
2657                         'uri'           => self::newURI(),
2658                         'uid'           => $item['uid'],
2659                         'contact-id'    => $owner['id'],
2660                         'wall'          => $item['wall'],
2661                         'origin'        => 1,
2662                         'network'       => Protocol::DFRN,
2663                         'protocol'      => Conversation::PARCEL_DIRECT,
2664                         'direction'     => Conversation::PUSH,
2665                         'gravity'       => GRAVITY_ACTIVITY,
2666                         'parent'        => $item['id'],
2667                         'thr-parent'    => $item['uri'],
2668                         'owner-id'      => $author_id,
2669                         'author-id'     => $author_id,
2670                         'body'          => $activity,
2671                         'verb'          => $activity,
2672                         'object-type'   => $objtype,
2673                         'allow_cid'     => $allow_cid ?? $item['allow_cid'],
2674                         'allow_gid'     => $allow_gid ?? $item['allow_gid'],
2675                         'deny_cid'      => $deny_cid ?? $item['deny_cid'],
2676                         'deny_gid'      => $deny_gid ?? $item['deny_gid'],
2677                         'visible'       => 1,
2678                         'unseen'        => 1,
2679                 ];
2680
2681                 $signed = Diaspora::createLikeSignature($uid, $new_item);
2682                 if (!empty($signed)) {
2683                         $new_item['diaspora_signed_text'] = json_encode($signed);
2684                 }
2685
2686                 $new_item_id = self::insert($new_item);
2687
2688                 // If the parent item isn't visible then set it to visible
2689                 if (!$item['visible']) {
2690                         self::update(['visible' => true], ['id' => $item['id']]);
2691                 }
2692
2693                 $new_item['id'] = $new_item_id;
2694
2695                 Hook::callAll('post_local_end', $new_item);
2696
2697                 return true;
2698         }
2699
2700         /**
2701          * Fetch the SQL condition for the given user id
2702          *
2703          * @param integer $owner_id User ID for which the permissions should be fetched
2704          * @return array condition
2705          */
2706         public static function getPermissionsConditionArrayByUserId(int $owner_id): array
2707         {
2708                 $local_user = local_user();
2709                 $remote_user = Session::getRemoteContactID($owner_id);
2710
2711                 // default permissions - anonymous user
2712                 $condition = ["`private` != ?", self::PRIVATE];
2713
2714                 if ($local_user && ($local_user == $owner_id)) {
2715                         // Profile owner - everything is visible
2716                         $condition = [];
2717                 } elseif ($remote_user) {
2718                          // Authenticated visitor - fetch the matching permissionsets
2719                         $permissionSets = DI::permissionSet()->selectByContactId($remote_user, $owner_id);
2720                         if (!empty($set)) {
2721                                 $condition = ["(`private` != ? OR (`private` = ? AND `wall`
2722                                         AND `psid` IN (" . implode(', ', array_fill(0, count($set), '?')) . ")))",
2723                                         self::PRIVATE, self::PRIVATE];
2724                                 $condition = array_merge($condition, $permissionSets->column('id'));
2725                         }
2726                 }
2727
2728                 return $condition;
2729         }
2730
2731         /**
2732          * Get a permission SQL string for the given user
2733          *
2734          * @param int $owner_id
2735          * @param string $table
2736          * @return string
2737          */
2738         public static function getPermissionsSQLByUserId(int $owner_id, string $table = ''): string
2739         {
2740                 $local_user = local_user();
2741                 $remote_user = Session::getRemoteContactID($owner_id);
2742
2743                 if (!empty($table)) {
2744                         $table = DBA::quoteIdentifier($table) . '.';
2745                 }
2746
2747                 /*
2748                  * Construct permissions
2749                  *
2750                  * default permissions - anonymous user
2751                  */
2752                 $sql = sprintf(" AND " . $table . "`private` != %d", self::PRIVATE);
2753
2754                 // Profile owner - everything is visible
2755                 if ($local_user && ($local_user == $owner_id)) {
2756                         $sql = '';
2757                 } elseif ($remote_user) {
2758                         /*
2759                          * Authenticated visitor. Unless pre-verified,
2760                          * check that the contact belongs to this $owner_id
2761                          * and load the groups the visitor belongs to.
2762                          * If pre-verified, the caller is expected to have already
2763                          * done this and passed the groups into this function.
2764                          */
2765                         $permissionSets = DI::permissionSet()->selectByContactId($remote_user, $owner_id);
2766
2767                         if (!empty($set)) {
2768                                 $sql_set = sprintf(" OR (" . $table . "`private` = %d AND " . $table . "`wall` AND " . $table . "`psid` IN (", self::PRIVATE) . implode(',', $permissionSets->column('id')) . "))";
2769                         } else {
2770                                 $sql_set = '';
2771                         }
2772
2773                         $sql = sprintf(" AND (" . $table . "`private` != %d", self::PRIVATE) . $sql_set . ")";
2774                 }
2775
2776                 return $sql;
2777         }
2778
2779         /**
2780          * get translated item type
2781          *
2782          * @param array                $item
2783          * @param \Friendica\Core\L10n $l10n
2784          * @return string
2785          */
2786         public static function postType(array $item, \Friendica\Core\L10n $l10n): string
2787         {
2788                 if (!empty($item['event-id'])) {
2789                         return $l10n->t('event');
2790                 } elseif (!empty($item['resource-id'])) {
2791                         return $l10n->t('photo');
2792                 } elseif ($item['gravity'] == GRAVITY_ACTIVITY) {
2793                         return $l10n->t('activity');
2794                 } elseif ($item['gravity'] == GRAVITY_COMMENT) {
2795                         return $l10n->t('comment');
2796                 }
2797
2798                 return $l10n->t('post');
2799         }
2800
2801         /**
2802          * Sets the "rendered-html" field of the provided item
2803          *
2804          * Body is preserved to avoid side-effects as we modify it just-in-time for spoilers and private image links
2805          *
2806          * @param array $item
2807          *
2808          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
2809          * @todo Remove reference, simply return "rendered-html" and "rendered-hash"
2810          */
2811         private static function putInCache(&$item)
2812         {
2813                 // Save original body to prevent addons to modify it
2814                 $body = $item['body'];
2815
2816                 $rendered_hash = $item['rendered-hash'] ?? '';
2817                 $rendered_html = $item['rendered-html'] ?? '';
2818
2819                 if ($rendered_hash == ''
2820                         || $rendered_html == ''
2821                         || $rendered_hash != hash('md5', BBCode::VERSION . '::' . $body)
2822                         || DI::config()->get('system', 'ignore_cache')
2823                 ) {
2824                         $item['rendered-html'] = BBCode::convertForUriId($item['uri-id'], $item['body']);
2825                         $item['rendered-hash'] = hash('md5', BBCode::VERSION . '::' . $body);
2826
2827                         $hook_data = ['item' => $item, 'rendered-html' => $item['rendered-html'], 'rendered-hash' => $item['rendered-hash']];
2828                         Hook::callAll('put_item_in_cache', $hook_data);
2829                         $item['rendered-html'] = $hook_data['rendered-html'];
2830                         $item['rendered-hash'] = $hook_data['rendered-hash'];
2831                         unset($hook_data);
2832
2833                         // Update if the generated values differ from the existing ones
2834                         if ((($rendered_hash != $item['rendered-hash']) || ($rendered_html != $item['rendered-html'])) && !empty($item['id'])) {
2835                                 self::update(
2836                                         [
2837                                                 'rendered-html' => $item['rendered-html'],
2838                                                 'rendered-hash' => $item['rendered-hash']
2839                                         ],
2840                                         ['id' => $item['id']]
2841                                 );
2842                         }
2843                 }
2844
2845                 $item['body'] = $body;
2846         }
2847
2848         /**
2849          * Given an item array, convert the body element from bbcode to html and add smilie icons.
2850          * If attach is true, also add icons for item attachments.
2851          *
2852          * @param array   $item Record from item table
2853          * @param boolean $attach If true, add icons for item attachments as well
2854          * @param boolean $is_preview Whether this is a preview
2855          * @param boolean $only_cache Whether only cached HTML should be updated
2856          * @return string item body html
2857          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
2858          * @throws \ImagickException
2859          * @hook  prepare_body_init item array before any work
2860          * @hook  prepare_body_content_filter ('item'=>item array, 'filter_reasons'=>string array) before first bbcode to html
2861          * @hook  prepare_body ('item'=>item array, 'html'=>body string, 'is_preview'=>boolean, 'filter_reasons'=>string array) after first bbcode to html
2862          * @hook  prepare_body_final ('item'=>item array, 'html'=>body string) after attach icons and blockquote special case handling (spoiler, author)
2863          */
2864         public static function prepareBody(array &$item, bool $attach = false, bool $is_preview = false, bool $only_cache = false): string
2865         {
2866                 $a = DI::app();
2867                 Hook::callAll('prepare_body_init', $item);
2868
2869                 // In order to provide theme developers more possibilities, event items
2870                 // are treated differently.
2871                 if ($item['object-type'] === Activity\ObjectType::EVENT && isset($item['event-id'])) {
2872                         $ev = Event::getItemHTML($item);
2873                         return $ev;
2874                 }
2875
2876                 $tags = Tag::populateFromItem($item);
2877
2878                 $item['tags'] = $tags['tags'];
2879                 $item['hashtags'] = $tags['hashtags'];
2880                 $item['mentions'] = $tags['mentions'];
2881
2882                 $body = $item['body'] ?? '';
2883                 $shared = BBCode::fetchShareAttributes($body);
2884                 if (!empty($shared['guid'])) {
2885                         $shared_item = Post::selectFirst(['uri-id', 'plink', 'has-media'], ['guid' => $shared['guid']]);
2886                         $shared_uri_id = $shared_item['uri-id'] ?? 0;
2887                         $shared_links = [strtolower($shared_item['plink'] ?? '')];
2888                         $shared_attachments = Post\Media::splitAttachments($shared_uri_id, $shared['guid'], [], $shared_item['has-media'] ?? false);
2889                         $shared_links = array_merge($shared_links, array_column($shared_attachments['visual'], 'url'));
2890                         $shared_links = array_merge($shared_links, array_column($shared_attachments['link'], 'url'));
2891                         $shared_links = array_merge($shared_links, array_column($shared_attachments['additional'], 'url'));
2892                         $item['body'] = self::replaceVisualAttachments($shared_attachments, $item['body']);
2893                 } else {
2894                         $shared_uri_id = 0;
2895                         $shared_links = [];
2896                 }
2897
2898                 $attachments = Post\Media::splitAttachments($item['uri-id'], $item['guid'] ?? '', $shared_links, $item['has-media'] ?? false);
2899                 $item['body'] = self::replaceVisualAttachments($attachments, $item['body'] ?? '');
2900
2901                 $item['body'] = preg_replace("/\s*\[attachment .*?\].*?\[\/attachment\]\s*/ism", "\n", $item['body']);
2902                 self::putInCache($item);
2903                 $item['body'] = $body;
2904                 $s = $item["rendered-html"];
2905
2906                 if ($only_cache) {
2907                         return '';
2908                 }
2909
2910                 // Compile eventual content filter reasons
2911                 $filter_reasons = [];
2912                 if (!$is_preview && public_contact() != $item['author-id']) {
2913                         if (!empty($item['content-warning']) && (!local_user() || !DI::pConfig()->get(local_user(), 'system', 'disable_cw', false))) {
2914                                 $filter_reasons[] = DI::l10n()->t('Content warning: %s', $item['content-warning']);
2915                         }
2916
2917                         $item['attachments'] = $attachments;
2918
2919                         $hook_data = [
2920                                 'item' => $item,
2921                                 'filter_reasons' => $filter_reasons
2922                         ];
2923                         Hook::callAll('prepare_body_content_filter', $hook_data);
2924                         $filter_reasons = $hook_data['filter_reasons'];
2925                         unset($hook_data);
2926                 }
2927
2928                 $hook_data = [
2929                         'item' => $item,
2930                         'html' => $s,
2931                         'preview' => $is_preview,
2932                         'filter_reasons' => $filter_reasons
2933                 ];
2934                 Hook::callAll('prepare_body', $hook_data);
2935                 $s = $hook_data['html'];
2936                 unset($hook_data);
2937
2938                 if (!$attach) {
2939                         // Replace the blockquotes with quotes that are used in mails.
2940                         $mailquote = '<blockquote type="cite" class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">';
2941                         $s = str_replace(['<blockquote>', '<blockquote class="spoiler">', '<blockquote class="author">'], [$mailquote, $mailquote, $mailquote], $s);
2942                         return $s;
2943                 }
2944
2945                 if (!empty($shared_attachments)) {
2946                         $s = self::addVisualAttachments($shared_attachments, $item, $s, true);
2947                         $s = self::addLinkAttachment($shared_uri_id ?: $item['uri-id'], $shared_attachments, $body, $s, true, []);
2948                         $s = self::addNonVisualAttachments($shared_attachments, $item, $s, true);
2949                         $body = preg_replace("/\s*\[share .*?\].*?\[\/share\]\s*/ism", '', $body);
2950                 }
2951
2952                 $s = self::addVisualAttachments($attachments, $item, $s, false);
2953                 $s = self::addLinkAttachment($item['uri-id'], $attachments, $body, $s, false, $shared_links);
2954                 $s = self::addNonVisualAttachments($attachments, $item, $s, false);
2955                 $s = self::addQuestions($item, $s);
2956
2957                 // Map.
2958                 if (strpos($s, '<div class="map">') !== false && !empty($item['coord'])) {
2959                         $x = Map::byCoordinates(trim($item['coord']));
2960                         if ($x) {
2961                                 $s = preg_replace('/\<div class\=\"map\"\>/', '$0' . $x, $s);
2962                         }
2963                 }
2964
2965                 // Replace friendica image url size with theme preference.
2966                 if (!empty($a->getThemeInfoValue('item_image_size'))) {
2967                         $ps = $a->getThemeInfoValue('item_image_size');
2968                         $s = preg_replace('|(<img[^>]+src="[^"]+/photo/[0-9a-f]+)-[0-9]|', "$1-" . $ps, $s);
2969                 }
2970
2971                 $s = HTML::applyContentFilter($s, $filter_reasons);
2972
2973                 $hook_data = ['item' => $item, 'html' => $s];
2974                 Hook::callAll('prepare_body_final', $hook_data);
2975
2976                 return $hook_data['html'];
2977         }
2978
2979         /**
2980          * Check if the body contains a link
2981          *
2982          * @param string $body
2983          * @param string $url
2984          * @param int    $type
2985          * @return bool
2986          */
2987         public static function containsLink(string $body, string $url, int $type = 0): bool
2988         {
2989                 // Make sure that for example site parameters aren't used when testing if the link is contained in the body
2990                 $urlparts = parse_url($url);
2991                 if (!empty($urlparts)) {
2992                         unset($urlparts['query']);
2993                         unset($urlparts['fragment']);
2994                         $url = (string)Uri::fromParts($urlparts);
2995                 } else {
2996                         return false;
2997                 }
2998
2999                 // Remove media links to only search in embedded content
3000                 // @todo Check images for image link, audio for audio links, ...
3001                 if (in_array($type, [Post\Media::AUDIO, Post\Media::VIDEO, Post\Media::IMAGE])) {
3002                         $body = preg_replace("/\[url=[^\[\]]*\](.*)\[\/url\]/Usi", ' $1 ', $body);
3003                 }
3004
3005                 if (strpos($body, $url)) {
3006                         return true;
3007                 }
3008                 foreach ([0, 1, 2] as $size) {
3009                         if (preg_match('#/photo/.*-' . $size . '\.#ism', $url) &&
3010                                 strpos(preg_replace('#(/photo/.*)-[012]\.#ism', '$1-' . $size . '.', $body), $url)) {
3011                                 return true;
3012                         }
3013                 }
3014                 return false;
3015         }
3016
3017         /**
3018          * Replace visual attachments in the body
3019          *
3020          * @param array $attachments
3021          * @param string $body
3022          * @return string modified body
3023          */
3024         private static function replaceVisualAttachments(array $attachments, string $body): string
3025         {
3026                 DI::profiler()->startRecording('rendering');
3027
3028                 foreach ($attachments['visual'] as $attachment) {
3029                         if (!empty($attachment['preview'])) {
3030                                 $proxy   = Post\Media::getPreviewUrlForId($attachment['id'], Proxy::SIZE_LARGE);
3031                                 $search  = ['[img=' . $attachment['preview'] . ']', ']' . $attachment['preview'] . '[/img]'];
3032                                 $replace = ['[img=' . $proxy . ']', ']' . $proxy . '[/img]'];
3033
3034                                 $body = str_replace($search, $replace, $body);
3035                         } elseif ($attachment['filetype'] == 'image') {
3036                                 $proxy   = Post\Media::getUrlForId($attachment['id']);
3037                                 $search  = ['[img=' . $attachment['url'] . ']', ']' . $attachment['url'] . '[/img]'];
3038                                 $replace = ['[img=' . $proxy . ']', ']' . $proxy . '[/img]'];
3039
3040                                 $body = str_replace($search, $replace, $body);
3041                         }
3042                 }
3043                 DI::profiler()->stopRecording();
3044                 return $body;
3045         }
3046
3047         /**
3048          * Add visual attachments to the content
3049          *
3050          * @param array $attachments
3051          * @param array $item
3052          * @param string $content
3053          * @return string modified content
3054          */
3055         private static function addVisualAttachments(array $attachments, array $item, string $content, bool $shared): string
3056         {
3057                 DI::profiler()->startRecording('rendering');
3058                 $leading = '';
3059                 $trailing = '';
3060
3061                 // @todo In the future we should make a single for the template engine with all media in it. This allows more flexibilty.
3062                 foreach ($attachments['visual'] as $attachment) {
3063                         if (self::containsLink($item['body'], $attachment['preview'] ?? $attachment['url'], $attachment['type'])) {
3064                                 continue;
3065                         }
3066
3067                         if (!empty($attachment['preview'])) {
3068                                 $preview_url = Post\Media::getPreviewUrlForId($attachment['id'], Proxy::SIZE_LARGE);
3069                         } else {
3070                                 $preview_url = '';
3071                         }
3072
3073                         if (($attachment['filetype'] == 'video')) {
3074                                 /// @todo Move the template to /content as well
3075                                 $media = Renderer::replaceMacros(Renderer::getMarkupTemplate('video_top.tpl'), [
3076                                         '$video' => [
3077                                                 'id'      => $attachment['id'],
3078                                                 'src'     => $attachment['url'],
3079                                                 'name'    => $attachment['name'] ?: $attachment['url'],
3080                                                 'preview' => $preview_url,
3081                                                 'mime'    => $attachment['mimetype'],
3082                                         ],
3083                                 ]);
3084                                 if (($item['post-type'] ?? null) == Item::PT_VIDEO) {
3085                                         $leading .= $media;
3086                                 } else {
3087                                         $trailing .= $media;
3088                                 }
3089                         } elseif ($attachment['filetype'] == 'audio') {
3090                                 $media = Renderer::replaceMacros(Renderer::getMarkupTemplate('content/audio.tpl'), [
3091                                         '$audio' => [
3092                                                 'id'     => $attachment['id'],
3093                                                 'src'    => $attachment['url'],
3094                                                 'name'   => $attachment['name'] ?: $attachment['url'],
3095                                                 'mime'   => $attachment['mimetype'],
3096                                         ],
3097                                 ]);
3098                                 if (($item['post-type'] ?? null) == Item::PT_AUDIO) {
3099                                         $leading .= $media;
3100                                 } else {
3101                                         $trailing .= $media;
3102                                 }
3103                         } elseif ($attachment['filetype'] == 'image') {
3104                                 $media = Renderer::replaceMacros(Renderer::getMarkupTemplate('content/image.tpl'), [
3105                                         '$image' => [
3106                                                 'src'        => Post\Media::getUrlForId($attachment['id']),
3107                                                 'preview'    => Post\Media::getPreviewUrlForId($attachment['id'], ($attachment['width'] > $attachment['height']) ? Proxy::SIZE_MEDIUM : Proxy::SIZE_LARGE),
3108                                                 'attachment' => $attachment,
3109                                         ],
3110                                 ]);
3111                                 // On Diaspora posts the attached pictures are leading
3112                                 if ($item['network'] == Protocol::DIASPORA) {
3113                                         $leading .= $media;
3114                                 } else {
3115                                         $trailing .= $media;
3116                                 }
3117                         }
3118                 }
3119
3120                 if ($shared) {
3121                         $content = str_replace(BBCode::TOP_ANCHOR, '<div class="body-attach">' . $leading . '<div class="clear"></div></div>' . BBCode::TOP_ANCHOR, $content);
3122                         $content = str_replace(BBCode::BOTTOM_ANCHOR, '<div class="body-attach">' . $trailing . '<div class="clear"></div></div>' . BBCode::BOTTOM_ANCHOR, $content);
3123                 } else {
3124                         if ($leading != '') {
3125                                 $content = '<div class="body-attach">' . $leading . '<div class="clear"></div></div>' . $content;
3126                         }
3127
3128                         if ($trailing != '') {
3129                                 $content .= '<div class="body-attach">' . $trailing . '<div class="clear"></div></div>';
3130                         }
3131                 }
3132
3133                 DI::profiler()->stopRecording();
3134                 return $content;
3135         }
3136
3137         /**
3138          * Add link attachment to the content
3139          *
3140          * @param array  $attachments
3141          * @param string $body
3142          * @param string $content
3143          * @param bool   $shared
3144          * @param array  $ignore_links A list of URLs to ignore
3145          * @return string modified content
3146          */
3147         private static function addLinkAttachment(int $uriid, array $attachments, string $body, string $content, bool $shared, array $ignore_links): string
3148         {
3149                 DI::profiler()->startRecording('rendering');
3150                 // Don't show a preview when there is a visual attachment (audio or video)
3151                 $types = array_column($attachments['visual'], 'type');
3152                 $preview = !in_array(Post\Media::IMAGE, $types) && !in_array(Post\Media::VIDEO, $types);
3153
3154                 if (!empty($attachments['link'])) {
3155                         foreach ($attachments['link'] as $link) {
3156                                 $found = false;
3157                                 foreach ($ignore_links as $ignore_link) {
3158                                         if (Strings::compareLink($link['url'], $ignore_link)) {
3159                                                 $found = true;
3160                                         }
3161                                 }
3162                                 // @todo Judge between the links to use the one with most information
3163                                 if (!$found && (empty($attachment) || !empty($link['author-name']) ||
3164                                         (empty($attachment['name']) && !empty($link['name'])) ||
3165                                         (empty($attachment['description']) && !empty($link['description'])) ||
3166                                         (empty($attachment['preview']) && !empty($link['preview'])))) {
3167                                         $attachment = $link;
3168                                 }
3169                         }
3170                 }
3171
3172                 if (!empty($attachment)) {
3173                         $data = [
3174                                 'after' => '',
3175                                 'author_name' => $attachment['author-name'] ?? '',
3176                                 'author_url' =>  $attachment['author-url'] ?? '',
3177                                 'description' => $attachment['description'] ?? '',
3178                                 'image' => '',
3179                                 'preview' => '',
3180                                 'provider_name' => $attachment['publisher-name'] ?? '',
3181                                 'provider_url' => $attachment['publisher-url'] ?? '',
3182                                 'text' => '',
3183                                 'title' => $attachment['name'] ?? '',
3184                                 'type' => 'link',
3185                                 'url' => $attachment['url']];
3186
3187                         if ($preview && !empty($attachment['preview'])) {
3188                                 if ($attachment['preview-width'] >= 500) {
3189                                         $data['image'] = Post\Media::getPreviewUrlForId($attachment['id'], Proxy::SIZE_MEDIUM);
3190                                 } else {
3191                                         $data['preview'] = Post\Media::getPreviewUrlForId($attachment['id'], Proxy::SIZE_MEDIUM);
3192                                 }
3193                         }
3194
3195                         if (!empty($data['description']) && !empty($content)) {
3196                                 similar_text($data['description'], $content, $percent);
3197                         } else {
3198                                 $percent = 0;
3199                         }
3200
3201                         if (!empty($data['description']) && (($data['title'] == $data['description']) || ($percent > 95) || (strpos($content, $data['description']) !== false))) {
3202                                 $data['description'] = '';
3203                         }
3204
3205                         if (($data['author_name'] ?? '') == ($data['provider_name'] ?? '')) {
3206                                 $data['author_name'] = '';
3207                         }
3208
3209                         if (($data['author_url'] ?? '') == ($data['provider_url'] ?? '')) {
3210                                 $data['author_url'] = '';
3211                         }
3212                 } elseif (preg_match("/.*(\[attachment.*?\].*?\[\/attachment\]).*/ism", $body, $match)) {
3213                         $data = BBCode::getAttachmentData($match[1]);
3214                 }
3215                 DI::profiler()->stopRecording();
3216
3217                 if (isset($data['url']) && !in_array($data['url'], $ignore_links)) {
3218                         if (!empty($data['description']) || !empty($data['image']) || !empty($data['preview'])) {
3219                                 $parts = parse_url($data['url']);
3220                                 if (!empty($parts['scheme']) && !empty($parts['host'])) {
3221                                         if (empty($data['provider_name'])) {
3222                                                 $data['provider_name'] = $parts['host'];
3223                                         }
3224                                         if (empty($data['provider_url']) || empty(parse_url($data['provider_url'], PHP_URL_SCHEME))) {
3225                                                 $data['provider_url'] = $parts['scheme'] . '://' . $parts['host'];
3226
3227                                                 if (!empty($parts['port'])) {
3228                                                         $data['provider_url'] .= ':' . $parts['port'];
3229                                                 }
3230                                         }
3231                                 }
3232
3233                                 // @todo Use a template
3234                                 $rendered = BBCode::convertAttachment('', BBCode::INTERNAL, false, $data, $uriid);
3235                         } elseif (!self::containsLink($content, $data['url'], Post\Media::HTML)) {
3236                                 $rendered = Renderer::replaceMacros(Renderer::getMarkupTemplate('content/link.tpl'), [
3237                                         '$url'  => $data['url'],
3238                                         '$title' => $data['title'],
3239                                 ]);
3240                         } else {
3241                                 return $content;
3242                         }
3243
3244                         if ($shared) {
3245                                 return str_replace(BBCode::BOTTOM_ANCHOR, BBCode::BOTTOM_ANCHOR . $rendered, $content);
3246                         } else {
3247                                 return $content . $rendered;
3248                         }
3249                 }
3250                 return $content;
3251         }
3252
3253         /**
3254          * Add non visual attachments to the content
3255          *
3256          * @param array $attachments
3257          * @param array $item
3258          * @param string $content
3259          * @return string modified content
3260          */
3261         private static function addNonVisualAttachments(array $attachments, array $item, string $content): string
3262         {
3263                 DI::profiler()->startRecording('rendering');
3264                 $trailing = '';
3265                 foreach ($attachments['additional'] as $attachment) {
3266                         if (strpos($item['body'], $attachment['url'])) {
3267                                 continue;
3268                         }
3269
3270                         $author = ['uid' => 0, 'id' => $item['author-id'],
3271                                 'network' => $item['author-network'], 'url' => $item['author-link']];
3272                         $the_url = Contact::magicLinkByContact($author, $attachment['url']);
3273
3274                         $title = Strings::escapeHtml(trim(($attachment['description'] ?? '') ?: $attachment['url']));
3275
3276                         if (!empty($attachment['size'])) {
3277                                 $title .= ' ' . $attachment['size'] . ' ' . DI::l10n()->t('bytes');
3278                         }
3279
3280                         /// @todo Use a template
3281                         $icon = '<div class="attachtype icon s22 type-' . $attachment['filetype'] . ' subtype-' . $attachment['subtype'] . '"></div>';
3282                         $trailing .= '<a href="' . strip_tags($the_url) . '" title="' . $title . '" class="attachlink" target="_blank" rel="noopener noreferrer" >' . $icon . '</a>';
3283                 }
3284
3285                 if ($trailing != '') {
3286                         $content .= '<div class="body-attach">' . $trailing . '<div class="clear"></div></div>';
3287                 }
3288
3289                 DI::profiler()->stopRecording();
3290                 return $content;
3291         }
3292
3293         private static function addQuestions(array $item, string $content): string
3294         {
3295                 DI::profiler()->startRecording('rendering');
3296                 if (!empty($item['question-id'])) {
3297                         $question = [
3298                                 'id'       => $item['question-id'],
3299                                 'multiple' => $item['question-multiple'],
3300                                 'voters'   => $item['question-voters'],
3301                                 'endtime'  => $item['question-end-time']
3302                         ];
3303
3304                         $options = Post\QuestionOption::getByURIId($item['uri-id']);
3305                         foreach ($options as $key => $option) {
3306                                 if ($question['voters'] > 0) {
3307                                         $percent = $option['replies'] / $question['voters'] * 100;
3308                                         $options[$key]['vote'] = DI::l10n()->tt('%2$s (%3$d%%, %1$d vote)', '%2$s (%3$d%%, %1$d votes)', $option['replies'], $option['name'], round($percent, 1));
3309                                 } else {
3310                                         $options[$key]['vote'] = DI::l10n()->tt('%2$s (%1$d vote)', '%2$s (%1$d votes)', $option['replies'], $option['name'], );
3311                                 }
3312                         }
3313
3314                         if (!empty($question['voters']) && !empty($question['endtime'])) {
3315                                 $summary = DI::l10n()->tt('%d voter. Poll end: %s', '%d voters. Poll end: %s', $question['voters'], Temporal::getRelativeDate($question['endtime']));
3316                         } elseif (!empty($question['voters'])) {
3317                                 $summary = DI::l10n()->tt('%d voter.', '%d voters.', $question['voters']);
3318                         } elseif (!empty($question['endtime'])) {
3319                                 $summary = DI::l10n()->t('Poll end: %s', Temporal::getRelativeDate($question['endtime']));
3320                         } else {
3321                                 $summary = '';
3322                         }
3323
3324                         $content .= Renderer::replaceMacros(Renderer::getMarkupTemplate('content/question.tpl'), [
3325                                 '$question' => $question,
3326                                 '$options'  => $options,
3327                                 '$summary'  => $summary,
3328                         ]);
3329         }
3330                 DI::profiler()->stopRecording();
3331                 return $content;
3332         }
3333
3334         /**
3335          * get private link for item
3336          *
3337          * @param array $item
3338          * @return boolean|array False if item has not plink, otherwise array('href'=>plink url, 'title'=>translated title)
3339          * @throws \Exception
3340          */
3341         public static function getPlink(array $item)
3342         {
3343                 if (!empty($item['plink']) && Network::isValidHttpUrl($item['plink'])) {
3344                         $plink = $item['plink'];
3345                 } elseif (!empty($item['uri']) && Network::isValidHttpUrl($item['uri']) && !Network::isLocalLink($item['uri'])) {
3346                         $plink = $item['uri'];
3347                 }
3348
3349                 if (local_user()) {
3350                         $ret = [
3351                                 'href' => "display/" . $item['guid'],
3352                                 'orig' => "display/" . $item['guid'],
3353                                 'title' => DI::l10n()->t('View on separate page'),
3354                                 'orig_title' => DI::l10n()->t('View on separate page'),
3355                         ];
3356
3357                         if (!empty($plink) && ($item['private'] == self::PRIVATE)) {
3358                                 $author = ['uid' => 0, 'id' => $item['author-id'],
3359                                         'network' => $item['author-network'], 'url' => $item['author-link']];
3360                                 $plink = Contact::magicLinkByContact($author, $plink);
3361                         }
3362
3363                         if (!empty($plink)) {
3364                                 $ret['href'] = DI::baseUrl()->remove($plink);
3365                                 $ret['title'] = DI::l10n()->t('Link to source');
3366                         }
3367                 } elseif (!empty($plink) && ($item['private'] != self::PRIVATE)) {
3368                         $ret = [
3369                                 'href' => $plink,
3370                                 'orig' => $plink,
3371                                 'title' => DI::l10n()->t('Link to source'),
3372                                 'orig_title' => DI::l10n()->t('Link to source'),
3373                         ];
3374                 } else {
3375                         $ret = [];
3376                 }
3377
3378                 return $ret;
3379         }
3380
3381         /**
3382          * Does the given uri-id belongs to a post that is sent as starting post to a forum?
3383          *
3384          * @param int $uri_id
3385          *
3386          * @return boolean "true" when it is a forum post
3387          */
3388         public static function isForumPost(int $uri_id): bool
3389         {
3390                 foreach (Tag::getByURIId($uri_id, [Tag::EXCLUSIVE_MENTION]) as $tag) {
3391                         if (DBA::exists('contact', ['uid' => 0, 'nurl' => Strings::normaliseLink($tag['url']), 'contact-type' => Contact::TYPE_COMMUNITY])) {
3392                                 return true;
3393                         }
3394                 }
3395                 return false;
3396         }
3397
3398         /**
3399          * Search item id for given URI or plink
3400          *
3401          * @param string $uri
3402          * @param integer $uid
3403          *
3404          * @return integer item id
3405          */
3406         public static function searchByLink(string $uri, int $uid = 0): int
3407         {
3408                 $ssl_uri = str_replace('http://', 'https://', $uri);
3409                 $uris = [$uri, $ssl_uri, Strings::normaliseLink($uri)];
3410
3411                 $item = Post::selectFirst(['id'], ['uri' => $uris, 'uid' => $uid]);
3412                 if (DBA::isResult($item)) {
3413                         return $item['id'];
3414                 }
3415
3416                 $item = Post::selectFirst(['id'], ['plink' => $uris, 'uid' => $uid]);
3417                 if (DBA::isResult($item)) {
3418                         return $item['id'];
3419                 }
3420
3421                 return 0;
3422         }
3423
3424         /**
3425          * Return the URI for a link to the post
3426          *
3427          * @param string $uri URI or link to post
3428          *
3429          * @return string URI
3430          */
3431         public static function getURIByLink(string $uri): string
3432         {
3433                 $ssl_uri = str_replace('http://', 'https://', $uri);
3434                 $uris = [$uri, $ssl_uri, Strings::normaliseLink($uri)];
3435
3436                 $item = Post::selectFirst(['uri'], ['uri' => $uris]);
3437                 if (DBA::isResult($item)) {
3438                         return $item['uri'];
3439                 }
3440
3441                 $item = Post::selectFirst(['uri'], ['plink' => $uris]);
3442                 if (DBA::isResult($item)) {
3443                         return $item['uri'];
3444                 }
3445
3446                 return '';
3447         }
3448
3449         /**
3450          * Fetches item for given URI or plink
3451          *
3452          * @param string $uri
3453          * @param integer $uid
3454          *
3455          * @return integer item id
3456          */
3457         public static function fetchByLink(string $uri, int $uid = 0): int
3458         {
3459                 Logger::info('Trying to fetch link', ['uid' => $uid, 'uri' => $uri]);
3460                 $item_id = self::searchByLink($uri, $uid);
3461                 if (!empty($item_id)) {
3462                         Logger::info('Link found', ['uid' => $uid, 'uri' => $uri, 'id' => $item_id]);
3463                         return $item_id;
3464                 }
3465
3466                 $hookData = [
3467                         'uri'     => $uri,
3468                         'uid'     => $uid,
3469                         'item_id' => null,
3470                 ];
3471
3472                 Hook::callAll('item_by_link', $hookData);
3473
3474                 if (isset($hookData['item_id'])) {
3475                         return is_numeric($hookData['item_id']) ? $hookData['item_id'] : 0;
3476                 }
3477
3478                 $fetched_uri = ActivityPub\Processor::fetchMissingActivity($uri);
3479
3480                 if ($fetched_uri) {
3481                         $item_id = self::searchByLink($fetched_uri, $uid);
3482                 } else {
3483                         $item_id = Diaspora::fetchByURL($uri);
3484                 }
3485
3486                 if (!empty($item_id)) {
3487                         Logger::info('Link fetched', ['uid' => $uid, 'uri' => $uri, 'id' => $item_id]);
3488                         return $item_id;
3489                 }
3490
3491                 Logger::info('Link not found', ['uid' => $uid, 'uri' => $uri]);
3492                 return 0;
3493         }
3494
3495         /**
3496          * Return share data from an item array (if the item is shared item)
3497          * We are providing the complete Item array, because at some time in the future
3498          * we hopefully will define these values not in the body anymore but in some item fields.
3499          * This function is meant to replace all similar functions in the system.
3500          *
3501          * @param array $item
3502          *
3503          * @return array with share information
3504          */
3505         public static function getShareArray(array $item): array
3506         {
3507                 return BBCode::fetchShareAttributes($item['body']);
3508         }
3509
3510         /**
3511          * Fetch item information for shared items from the original items and adds it.
3512          *
3513          * @param array $item
3514          *
3515          * @return array item array with data from the original item
3516          */
3517         public static function addShareDataFromOriginal(array $item): array
3518         {
3519                 $shared = self::getShareArray($item);
3520                 if (empty($shared)) {
3521                         return $item;
3522                 }
3523
3524                 // Real reshares always have got a GUID.
3525                 if (empty($shared['guid'])) {
3526                         return $item;
3527                 }
3528
3529                 $uid = $item['uid'] ?? 0;
3530
3531                 // first try to fetch the item via the GUID. This will work for all reshares that had been created on this system
3532                 $shared_item = Post::selectFirst(['title', 'body'], ['guid' => $shared['guid'], 'uid' => [0, $uid]]);
3533                 if (!DBA::isResult($shared_item)) {
3534                         if (empty($shared['link'])) {
3535                                 return $item;
3536                         }
3537
3538                         // Otherwhise try to find (and possibly fetch) the item via the link. This should work for Diaspora and ActivityPub posts
3539                         $id = self::fetchByLink($shared['link'] ?? '', $uid);
3540                         if (empty($id)) {
3541                                 Logger::info('Original item not found', ['url' => $shared['link'] ?? '', 'callstack' => System::callstack()]);
3542                                 return $item;
3543                         }
3544
3545                         $shared_item = Post::selectFirst(['title', 'body'], ['id' => $id]);
3546                         if (!DBA::isResult($shared_item)) {
3547                                 return $item;
3548                         }
3549                         Logger::info('Got shared data from url', ['url' => $shared['link'], 'callstack' => System::callstack()]);
3550                 } else {
3551                         Logger::info('Got shared data from guid', ['guid' => $shared['guid'], 'callstack' => System::callstack()]);
3552                 }
3553
3554                 if (!empty($shared_item['title'])) {
3555                         $body = '[h3]' . $shared_item['title'] . "[/h3]\n" . $shared_item['body'];
3556                         unset($shared_item['title']);
3557                 } else {
3558                         $body = $shared_item['body'];
3559                 }
3560
3561                 $item['body'] = preg_replace("/\[share ([^\[\]]*)\].*\[\/share\]/ism", '[share $1]' . str_replace('$', '\$', $body) . '[/share]', $item['body']);
3562                 unset($shared_item['body']);
3563
3564                 return array_merge($item, $shared_item);
3565         }
3566
3567         /**
3568          * Check a prospective item array against user-level permissions
3569          *
3570          * @param array $item Expected keys: uri, gravity, and
3571          *                    author-link if is author-id is set,
3572          *                    owner-link if is owner-id is set,
3573          *                    causer-link if is causer-id is set.
3574          * @param int   $user_id Local user ID
3575          * @return bool
3576          * @throws \Exception
3577          */
3578         protected static function isAllowedByUser(array $item, int $user_id): bool
3579         {
3580                 if (!empty($item['author-id']) && Contact\User::isBlocked($item['author-id'], $user_id)) {
3581                         Logger::notice('Author is blocked by user', ['author-link' => $item['author-link'], 'uid' => $user_id, 'item-uri' => $item['uri']]);
3582                         return false;
3583                 }
3584
3585                 if (!empty($item['owner-id']) && Contact\User::isBlocked($item['owner-id'], $user_id)) {
3586                         Logger::notice('Owner is blocked by user', ['owner-link' => $item['owner-link'], 'uid' => $user_id, 'item-uri' => $item['uri']]);
3587                         return false;
3588                 }
3589
3590                 // The causer is set during a thread completion, for example because of a reshare. It countains the responsible actor.
3591                 if (!empty($item['causer-id']) && Contact\User::isBlocked($item['causer-id'], $user_id)) {
3592                         Logger::notice('Causer is blocked by user', ['causer-link' => $item['causer-link'] ?? $item['causer-id'], 'uid' => $user_id, 'item-uri' => $item['uri']]);
3593                         return false;
3594                 }
3595
3596                 if (!empty($item['causer-id']) && ($item['gravity'] === GRAVITY_PARENT) && Contact\User::isIgnored($item['causer-id'], $user_id)) {
3597                         Logger::notice('Causer is ignored by user', ['causer-link' => $item['causer-link'] ?? $item['causer-id'], 'uid' => $user_id, 'item-uri' => $item['uri']]);
3598                         return false;
3599                 }
3600
3601                 return true;
3602         }
3603
3604         /**
3605          * Improve the data in shared posts
3606          *
3607          * @param array $item
3608          * @return string body
3609          */
3610         public static function improveSharedDataInBody(array $item): string
3611         {
3612                 $shared = BBCode::fetchShareAttributes($item['body']);
3613                 if (empty($shared['link'])) {
3614                         return $item['body'];
3615                 }
3616
3617                 $id = self::fetchByLink($shared['link']);
3618                 Logger::info('Fetched shared post', ['uri-id' => $item['uri-id'], 'id' => $id, 'author' => $shared['profile'], 'url' => $shared['link'], 'guid' => $shared['guid'], 'callstack' => System::callstack()]);
3619                 if (!$id) {
3620                         return $item['body'];
3621                 }
3622
3623                 $shared_item = Post::selectFirst(['author-name', 'author-link', 'author-avatar', 'plink', 'created', 'guid', 'title', 'body'], ['id' => $id]);
3624                 if (!DBA::isResult($shared_item)) {
3625                         return $item['body'];
3626                 }
3627
3628                 $shared_content = BBCode::getShareOpeningTag($shared_item['author-name'], $shared_item['author-link'], $shared_item['author-avatar'], $shared_item['plink'], $shared_item['created'], $shared_item['guid']);
3629
3630                 if (!empty($shared_item['title'])) {
3631                         $shared_content .= '[h3]'.$shared_item['title'].'[/h3]'."\n";
3632                 }
3633
3634                 $shared_content .= $shared_item['body'];
3635
3636                 $item['body'] = preg_replace("/\[share.*?\](.*)\[\/share\]/ism", $shared_content . '[/share]', $item['body']);
3637                 Logger::info('New shared data', ['uri-id' => $item['uri-id'], 'id' => $id, 'shared_item' => $shared_item]);
3638                 return $item['body'];
3639         }
3640 }