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\System;
  31 use Friendica\Model\Tag;
  32 use Friendica\Core\Worker;
  33 use Friendica\Database\DBA;
  34 use Friendica\DI;
  35 use Friendica\Protocol\Activity;
  36 use Friendica\Protocol\ActivityPub;
  37 use Friendica\Protocol\Diaspora;
  38 use Friendica\Util\DateTimeFormat;
  39 use Friendica\Util\Map;
  40 use Friendica\Util\Network;
  41 use Friendica\Util\Proxy;
  42 use Friendica\Util\Strings;
  43 use Friendica\Util\Temporal;
  44 use Friendica\Worker\Delivery;
  45 use GuzzleHttp\Psr7\Uri;
  46 use LanguageDetection\Language;
  47
  48 class Item
  49 {
  50         // Posting types, inspired by https://www.w3.org/TR/activitystreams-vocabulary/#object-types
  51         const PT_ARTICLE = 0;
  52         const PT_NOTE = 1;
  53         const PT_PAGE = 2;
  54         const PT_IMAGE = 16;
  55         const PT_AUDIO = 17;
  56         const PT_VIDEO = 18;
  57         const PT_DOCUMENT = 19;
  58         const PT_EVENT = 32;
  59         const PT_POLL = 33;
  60         const PT_PERSONAL_NOTE = 128;
  61
  62         // Posting reasons (Why had a post been stored for a user?)
  63         const PR_NONE = 0;
  64         const PR_TAG = 64;
  65         const PR_TO = 65;
  66         const PR_CC = 66;
  67         const PR_BTO = 67;
  68         const PR_BCC = 68;
  69         const PR_FOLLOWER = 69;
  70         const PR_ANNOUNCEMENT = 70;
  71         const PR_COMMENT = 71;
  72         const PR_STORED = 72;
  73         const PR_GLOBAL = 73;
  74         const PR_RELAY = 74;
  75         const PR_FETCHED = 75;
  76         const PR_COMPLETION = 76;
  77         const PR_DIRECT = 77;
  78         const PR_ACTIVITY = 78;
  79         const PR_DISTRIBUTE = 79;
  80         const PR_PUSHED = 80;
  81         const PR_LOCAL = 81;
  82
  83         // system.accept_only_sharer setting values
  84         const COMPLETION_NONE    = 1;
  85         const COMPLETION_COMMENT = 0;
  86         const COMPLETION_LIKE    = 2;
  87
  88         // Field list that is used to display the items
  89         const DISPLAY_FIELDLIST = [
  90                 'uid', 'id', 'parent', 'guid', 'network', 'gravity',
  91                 'uri-id', 'uri', 'thr-parent-id', 'thr-parent', 'parent-uri-id', 'parent-uri', 'conversation',
  92                 'commented', 'created', 'edited', 'received', 'verb', 'object-type', 'postopts', 'plink',
  93                 'wall', 'private', 'starred', 'origin', 'parent-origin', 'title', 'body', 'language',
  94                 'content-warning', 'location', 'coord', 'app', 'rendered-hash', 'rendered-html', 'object',
  95                 'quote-uri', 'quote-uri-id', 'allow_cid', 'allow_gid', 'deny_cid', 'deny_gid', 'mention', 'global',
  96                 'author-id', 'author-link', 'author-name', 'author-avatar', 'author-network', 'author-updated', 'author-gsid', 'author-addr', 'author-uri-id',
  97                 'owner-id', 'owner-link', 'owner-name', 'owner-avatar', 'owner-network', 'owner-contact-type', 'owner-updated',
  98                 'causer-id', 'causer-link', 'causer-name', 'causer-avatar', 'causer-contact-type', 'causer-network',
  99                 'contact-id', 'contact-uid', 'contact-link', 'contact-name', 'contact-avatar',
 100                 'writable', 'self', 'cid', 'alias',
 101                 'event-created', 'event-edited', 'event-start', 'event-finish',
 102                 'event-summary', 'event-desc', 'event-location', 'event-type',
 103                 'event-nofinish', 'event-ignore', 'event-id',
 104                 'question-id', 'question-multiple', 'question-voters', 'question-end-time',
 105                 'has-categories', 'has-media',
 106                 'delivery_queue_count', 'delivery_queue_done', 'delivery_queue_failed'
 107         ];
 108
 109         // Field list that is used to deliver items via the protocols
 110         const DELIVER_FIELDLIST = ['uid', 'id', 'parent', 'uri-id', 'uri', 'thr-parent', 'parent-uri', 'guid',
 111                         'parent-guid', 'conversation', 'received', 'created', 'edited', 'verb', 'object-type', 'object', 'target',
 112                         'private', 'title', 'body', 'raw-body', 'location', 'coord', 'app',
 113                         'inform', 'deleted', 'extid', 'post-type', 'post-reason', 'gravity',
 114                         'allow_cid', 'allow_gid', 'deny_cid', 'deny_gid',
 115                         'author-id', 'author-addr', 'author-link', 'author-name', 'author-avatar', 'owner-id', 'owner-link', 'contact-uid',
 116                         'signed_text', 'network', 'wall', 'contact-id', 'plink', 'origin',
 117                         'thr-parent-id', 'parent-uri-id', 'quote-uri', 'quote-uri-id', 'postopts', 'pubmail',
 118                         'event-created', 'event-edited', 'event-start', 'event-finish',
 119                         'event-summary', 'event-desc', 'event-location', 'event-type',
 120                         'event-nofinish', 'event-ignore', 'event-id'];
 121
 122         // All fields in the item table
 123         const ITEM_FIELDLIST = ['id', 'uid', 'parent', 'uri', 'parent-uri', 'thr-parent',
 124                         'guid', 'uri-id', 'parent-uri-id', 'thr-parent-id', 'conversation', 'vid',
 125                         'quote-uri', 'quote-uri-id', 'contact-id', 'wall', 'gravity', 'extid', 'psid',
 126                         'created', 'edited', 'commented', 'received', 'changed', 'verb',
 127                         'postopts', 'plink', 'resource-id', 'event-id', 'inform',
 128                         'allow_cid', 'allow_gid', 'deny_cid', 'deny_gid', 'post-type', 'post-reason',
 129                         'private', 'pubmail', 'visible', 'starred',
 130                         'unseen', 'deleted', 'origin', 'mention', 'global', 'network',
 131                         'title', 'content-warning', 'body', 'location', 'coord', 'app',
 132                         'rendered-hash', 'rendered-html', 'object-type', 'object', 'target-type', 'target',
 133                         'author-id', 'author-link', 'author-name', 'author-avatar', 'author-network',
 134                         'owner-id', 'owner-link', 'owner-name', 'owner-avatar', 'causer-id'];
 135
 136         // List of all verbs that don't need additional content data.
 137         // Never reorder or remove entries from this list. Just add new ones at the end, if needed.
 138         const ACTIVITIES = [
 139                 Activity::LIKE, Activity::DISLIKE,
 140                 Activity::ATTEND, Activity::ATTENDNO, Activity::ATTENDMAYBE,
 141                 Activity::FOLLOW,
 142                 Activity::ANNOUNCE];
 143
 144         // Privacy levels
 145         const PUBLIC = 0;
 146         const PRIVATE = 1;
 147         const UNLISTED = 2;
 148
 149         // Item weight for query ordering
 150         const GRAVITY_PARENT   = 0;
 151         const GRAVITY_ACTIVITY = 3;
 152         const GRAVITY_COMMENT  = 6;
 153         const GRAVITY_UNKNOWN  = 9;
 154
 155         /**
 156          * Update existing item entries
 157          *
 158          * @param array $fields    The fields that are to be changed
 159          * @param array $condition The condition for finding the item entries
 160          *
 161          * In the future we may have to change permissions as well.
 162          * Then we had to add the user id as third parameter.
 163          *
 164          * A return value of "0" doesn't mean an error - but that 0 rows had been changed.
 165          *
 166          * @return integer|boolean number of affected rows - or "false" if there was an error
 167          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 168          */
 169         public static function update(array $fields, array $condition)
 170         {
 171                 if (empty($condition) || empty($fields)) {
 172                         return false;
 173                 }
 174
 175                 if (isset($fields['extid'])) {
 176                         $fields['external-id'] = ItemURI::getIdByURI($fields['extid']);
 177                 }
 178
 179                 if (!empty($fields['verb'])) {
 180                         $fields['vid'] = Verb::getID($fields['verb']);
 181                 }
 182
 183                 if (!empty($fields['edited'])) {
 184                         $previous = Post::selectFirst(['edited'], $condition);
 185                 }
 186
 187                 $rows = Post::update($fields, $condition);
 188                 if (is_bool($rows)) {
 189                         return $rows;
 190                 }
 191
 192                 // We only need to call the line by line update for specific fields
 193                 if (empty($fields['body']) && empty($fields['file']) &&
 194                         empty($fields['attach']) && empty($fields['edited'])) {
 195                         return $rows;
 196                 }
 197
 198                 Logger::info('Updating per single row method', ['fields' => $fields, 'condition' => $condition]);
 199
 200                 $items = Post::select(['id', 'origin', 'uri-id', 'uid', 'author-network', 'quote-uri-id'], $condition);
 201
 202                 $notify_items = [];
 203
 204                 while ($item = DBA::fetch($items)) {
 205                         if (!empty($fields['body'])) {
 206                                 if (!empty($item['quote-uri-id'])) {
 207                                         $fields['body'] = BBCode::removeSharedData($fields['body']);
 208
 209                                         if (!empty($fields['raw-body'])) {
 210                                                 $fields['raw-body'] = BBCode::removeSharedData($fields['raw-body']);
 211                                         }
 212                                 }
 213
 214                                 Post\Media::insertFromAttachmentData($item['uri-id'], $fields['body']);
 215
 216                                 $content_fields = ['raw-body' => trim($fields['raw-body'] ?? $fields['body'])];
 217
 218                                 // Remove all media attachments from the body and store them in the post-media table
 219                                 // @todo On shared postings (Diaspora style and commented reshare) don't fetch content from the shared part
 220                                 $content_fields['raw-body'] = Post\Media::insertFromBody($item['uri-id'], $content_fields['raw-body']);
 221                                 $content_fields['raw-body'] = self::setHashtags($content_fields['raw-body']);
 222
 223                                 Post\Media::insertFromRelevantUrl($item['uri-id'], $content_fields['raw-body']);
 224                                 Post\Content::update($item['uri-id'], $content_fields);
 225                         }
 226
 227                         if (!empty($fields['file'])) {
 228                                 Post\Category::storeTextByURIId($item['uri-id'], $item['uid'], $fields['file']);
 229                         }
 230
 231                         if (!empty($fields['attach'])) {
 232                                 Post\Media::insertFromAttachment($item['uri-id'], $fields['attach']);
 233                         }
 234
 235                         // We only need to notfiy others when it is an original entry from us.
 236                         // Only call the notifier when the item had been edited and records had been changed.
 237                         if ($item['origin'] && !empty($fields['edited']) && ($previous['edited'] != $fields['edited'])) {
 238                                 $notify_items[] = $item['id'];
 239                         }
 240                 }
 241
 242                 DBA::close($items);
 243
 244                 foreach ($notify_items as $notify_item) {
 245                         $post = Post::selectFirst(['uri-id', 'uid'], ['id' => $notify_item]);
 246                         Worker::add(Worker::PRIORITY_HIGH, 'Notifier', Delivery::POST, (int)$post['uri-id'], (int)$post['uid']);
 247                 }
 248
 249                 return $rows;
 250         }
 251
 252         /**
 253          * Delete an item and notify others about it - if it was ours
 254          *
 255          * @param array   $condition The condition for finding the item entries
 256          * @param integer $priority  Priority for the notification
 257          * @return void
 258          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 259          */
 260         public static function markForDeletion(array $condition, int $priority = Worker::PRIORITY_HIGH)
 261         {
 262                 $items = Post::select(['id'], $condition);
 263                 while ($item = Post::fetch($items)) {
 264                         self::markForDeletionById($item['id'], $priority);
 265                 }
 266                 DBA::close($items);
 267         }
 268
 269         /**
 270          * Delete an item for an user and notify others about it - if it was ours
 271          *
 272          * @param array   $condition The condition for finding the item entries
 273          * @param integer $uid       User who wants to delete this item
 274          * @return void
 275          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 276          */
 277         public static function deleteForUser(array $condition, int $uid)
 278         {
 279                 if ($uid == 0) {
 280                         return;
 281                 }
 282
 283                 $items = Post::select(['id', 'uid', 'uri-id'], $condition);
 284                 while ($item = Post::fetch($items)) {
 285                         if (in_array($item['uid'], [$uid, 0])) {
 286                                 Post\User::update($item['uri-id'], $uid, ['hidden' => true], true);
 287                                 Post\ThreadUser::update($item['uri-id'], $uid, ['hidden' => true], true);
 288                         }
 289
 290                         if ($item['uid'] == $uid) {
 291                                 self::markForDeletionById($item['id'], Worker::PRIORITY_HIGH);
 292                         } elseif ($item['uid'] != 0) {
 293                                 Logger::warning('Wrong ownership. Not deleting item', ['id' => $item['id']]);
 294                         }
 295                 }
 296                 DBA::close($items);
 297         }
 298
 299         /**
 300          * Mark an item for deletion, delete related data and notify others about it - if it was ours
 301          *
 302          * @param integer $item_id
 303          * @param integer $priority Priority for the notification
 304          * @return boolean success
 305          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 306          */
 307         public static function markForDeletionById(int $item_id, int $priority = Worker::PRIORITY_HIGH): bool
 308         {
 309                 Logger::info('Mark item for deletion by id', ['id' => $item_id, 'callstack' => System::callstack()]);
 310                 // locate item to be deleted
 311                 $fields = ['id', 'uri', 'uri-id', 'uid', 'parent', 'parent-uri-id', 'origin',
 312                         'deleted', 'resource-id', 'event-id',
 313                         'verb', 'object-type', 'object', 'target', 'contact-id', 'psid', 'gravity'];
 314                 $item = Post::selectFirst($fields, ['id' => $item_id]);
 315                 if (!DBA::isResult($item)) {
 316                         Logger::info('Item not found.', ['id' => $item_id]);
 317                         return false;
 318                 }
 319
 320                 if ($item['deleted']) {
 321                         Logger::info('Item has already been marked for deletion.', ['id' => $item_id]);
 322                         return false;
 323                 }
 324
 325                 $parent = Post::selectFirst(['origin'], ['id' => $item['parent']]);
 326                 if (!DBA::isResult($parent)) {
 327                         $parent = ['origin' => false];
 328                 }
 329
 330                 // clean up categories and tags so they don't end up as orphans
 331                 Post\Category::deleteByURIId($item['uri-id'], $item['uid']);
 332
 333                 /*
 334                  * If item is a link to a photo resource, nuke all the associated photos
 335                  * (visitors will not have photo resources)
 336                  * This only applies to photos uploaded from the photos page. Photos inserted into a post do not
 337                  * generate a resource-id and therefore aren't intimately linked to the item.
 338                  */
 339                 /// @TODO: this should first check if photo is used elsewhere
 340                 if ($item['resource-id']) {
 341                         Photo::delete(['resource-id' => $item['resource-id'], 'uid' => $item['uid']]);
 342                 }
 343
 344                 // If item is a link to an event, delete the event.
 345                 if (intval($item['event-id'])) {
 346                         Event::delete($item['event-id']);
 347                 }
 348
 349                 // If item has attachments, drop them
 350                 $attachments = Post\Media::getByURIId($item['uri-id'], [Post\Media::DOCUMENT]);
 351                 foreach($attachments as $attachment) {
 352                         if (preg_match('|attach/(\d+)|', $attachment['url'], $matches)) {
 353                                 Attach::delete(['id' => $matches[1], 'uid' => $item['uid']]);
 354                         }
 355                 }
 356
 357                 // Set the item to "deleted"
 358                 $item_fields = ['deleted' => true, 'edited' => DateTimeFormat::utcNow(), 'changed' => DateTimeFormat::utcNow()];
 359                 Post::update($item_fields, ['id' => $item['id']]);
 360
 361                 Post\Category::storeTextByURIId($item['uri-id'], $item['uid'], '');
 362
 363                 if (!Post::exists(["`uri-id` = ? AND `uid` != 0 AND NOT `deleted`", $item['uri-id']])) {
 364                         self::markForDeletion(['uri-id' => $item['uri-id'], 'uid' => 0, 'deleted' => false], $priority);
 365                 }
 366
 367                 Post\DeliveryData::delete($item['uri-id']);
 368
 369                 // If it's the parent of a comment thread, kill all the kids
 370                 if ($item['gravity'] == self::GRAVITY_PARENT) {
 371                         self::markForDeletion(['parent' => $item['parent'], 'deleted' => false], $priority);
 372                 }
 373
 374                 // Is it our comment and/or our thread?
 375                 if (($item['origin'] || $parent['origin']) && ($item['uid'] != 0)) {
 376                         // When we delete the original post we will delete all existing copies on the server as well
 377                         self::markForDeletion(['uri-id' => $item['uri-id'], 'deleted' => false], $priority);
 378
 379                         // send the notification upstream/downstream
 380                         if ($priority) {
 381                                 Worker::add(['priority' => $priority, 'dont_fork' => true], 'Notifier', Delivery::DELETION, (int)$item['uri-id'], (int)$item['uid']);
 382                         }
 383                 } elseif ($item['uid'] != 0) {
 384                         Post\User::update($item['uri-id'], $item['uid'], ['hidden' => true]);
 385                         Post\ThreadUser::update($item['uri-id'], $item['uid'], ['hidden' => true]);
 386                 }
 387
 388                 DI::notify()->deleteForItem($item['uri-id']);
 389                 DI::notification()->deleteForItem($item['uri-id']);
 390
 391                 Logger::info('Item has been marked for deletion.', ['id' => $item_id]);
 392
 393                 return true;
 394         }
 395
 396         /**
 397          * Get guid from given item record
 398          *
 399          * @param array $item Item record
 400          * @param bool Whether to notify (?)
 401          * @return string Guid
 402          */
 403         public static function guid(array $item, bool $notify): string
 404         {
 405                 if (!empty($item['guid'])) {
 406                         return trim($item['guid']);
 407                 }
 408
 409                 if ($notify) {
 410                         // We have to avoid duplicates. So we create the GUID in form of a hash of the plink or uri.
 411                         // We add the hash of our own host because our host is the original creator of the post.
 412                         $prefix_host = DI::baseUrl()->getHostname();
 413                 } else {
 414                         $prefix_host = '';
 415
 416                         // We are only storing the post so we create a GUID from the original hostname.
 417                         if (!empty($item['author-link'])) {
 418                                 $parsed = parse_url($item['author-link']);
 419                                 if (!empty($parsed['host'])) {
 420                                         $prefix_host = $parsed['host'];
 421                                 }
 422                         }
 423
 424                         if (empty($prefix_host) && !empty($item['plink'])) {
 425                                 $parsed = parse_url($item['plink']);
 426                                 if (!empty($parsed['host'])) {
 427                                         $prefix_host = $parsed['host'];
 428                                 }
 429                         }
 430
 431                         if (empty($prefix_host) && !empty($item['uri'])) {
 432                                 $parsed = parse_url($item['uri']);
 433                                 if (!empty($parsed['host'])) {
 434                                         $prefix_host = $parsed['host'];
 435                                 }
 436                         }
 437
 438                         // Is it in the format data@host.tld? - Used for mail contacts
 439                         if (empty($prefix_host) && !empty($item['author-link']) && strstr($item['author-link'], '@')) {
 440                                 $mailparts = explode('@', $item['author-link']);
 441                                 $prefix_host = array_pop($mailparts);
 442                         }
 443                 }
 444
 445                 if (!empty($item['plink'])) {
 446                         $guid = self::guidFromUri($item['plink'], $prefix_host);
 447                 } elseif (!empty($item['uri'])) {
 448                         $guid = self::guidFromUri($item['uri'], $prefix_host);
 449                 } else {
 450                         $guid = System::createUUID(hash('crc32', $prefix_host));
 451                 }
 452
 453                 return $guid;
 454         }
 455
 456         /**
 457          * Returns contact id from given item record
 458          *
 459          * @param array $item Item record
 460          * @return int Contact id
 461          */
 462         private static function contactId(array $item): int
 463         {
 464                 if ($item['uid'] == 0) {
 465                         return $item['author-id'];
 466                 }
 467
 468                 if ($item['origin']) {
 469                         $owner = User::getOwnerDataById($item['uid']);
 470                         return $owner['id'];
 471                 }
 472
 473                 if (!empty($item['causer-id']) && Contact::isSharing($item['causer-id'], $item['uid'], true)) {
 474                         $cdata = Contact::getPublicAndUserContactID($item['causer-id'], $item['uid']);
 475                         if (!empty($cdata['user'])) {
 476                                 return $cdata['user'];
 477                         }
 478                 }
 479
 480                 if ($item['gravity'] == self::GRAVITY_PARENT) {
 481                         if (Contact::isSharingByURL($item['owner-link'], $item['uid'], true)) {
 482                                 $contact_id = Contact::getIdForURL($item['owner-link'], $item['uid']);
 483                         } else {
 484                                 $contact_id = Contact::getIdForURL($item['owner-link']);
 485                         }
 486                         if (!empty($contact_id)) {
 487                                 return $contact_id;
 488                         }
 489                 }
 490
 491                 if (Contact::isSharingByURL($item['author-link'], $item['uid'], true)) {
 492                         $contact_id = Contact::getIdForURL($item['author-link'], $item['uid']);
 493                 } else {
 494                         $contact_id = Contact::getIdForURL($item['author-link']);
 495                 }
 496
 497                 if (!empty($contact_id)) {
 498                         return $contact_id;
 499                 }
 500
 501                 Logger::warning('contact-id could not be fetched, using self contact instead.', ['uid' => $item['uid'], 'item' => $item]);
 502                 $self = Contact::selectFirst(['id'], ['self' => true, 'uid' => $item['uid']]);
 503                 return $self['id'];
 504         }
 505
 506         /**
 507          * Write an item array into a spool file to be inserted later.
 508          * This command is called whenever there are issues storing an item.
 509          *
 510          * @param array $item The item fields that are to be inserted
 511          * @throws \Exception
 512          */
 513         private static function spool(array $item)
 514         {
 515                 // Now we store the data in the spool directory
 516                 // We use "microtime" to keep the arrival order and "mt_rand" to avoid duplicates
 517                 $file = 'item-' . round(microtime(true) * 10000) . '-' . mt_rand() . '.msg';
 518
 519                 $spoolpath = System::getSpoolPath();
 520                 if ($spoolpath != '') {
 521                         $spool = $spoolpath . '/' . $file;
 522
 523                         file_put_contents($spool, json_encode($item));
 524                         Logger::warning("Item wasn't stored - Item was spooled into file", ['file' => $file]);
 525                 }
 526         }
 527
 528         /**
 529          * Check if the item array is a duplicate
 530          *
 531          * @param array $item Item record
 532          * @return boolean is it a duplicate?
 533          */
 534         private static function isDuplicate(array $item): bool
 535         {
 536                 // Checking if there is already an item with the same guid
 537                 $condition = ['guid' => $item['guid'], 'network' => $item['network'], 'uid' => $item['uid']];
 538                 if (Post::exists($condition)) {
 539                         Logger::notice('Found already existing item', $condition);
 540                         return true;
 541                 }
 542
 543                 $condition = ['uri-id' => $item['uri-id'], 'uid' => $item['uid'],
 544                         'network' => [$item['network'], Protocol::DFRN]];
 545                 if (Post::exists($condition)) {
 546                         Logger::notice('duplicated item with the same uri found.', $condition);
 547                         return true;
 548                 }
 549
 550                 // On Friendica and Diaspora the GUID is unique
 551                 if (in_array($item['network'], [Protocol::DFRN, Protocol::DIASPORA])) {
 552                         $condition = ['guid' => $item['guid'], 'uid' => $item['uid']];
 553                         if (Post::exists($condition)) {
 554                                 Logger::notice('duplicated item with the same guid found.', $condition);
 555                                 return true;
 556                         }
 557                 } elseif ($item['network'] == Protocol::OSTATUS) {
 558                         // Check for an existing post with the same content. There seems to be a problem with OStatus.
 559                         $condition = ["`body` = ? AND `network` = ? AND `created` = ? AND `contact-id` = ? AND `uid` = ?",
 560                                         $item['body'], $item['network'], $item['created'], $item['contact-id'], $item['uid']];
 561                         if (Post::exists($condition)) {
 562                                 Logger::notice('duplicated item with the same body found.', $item);
 563                                 return true;
 564                         }
 565                 }
 566
 567                 /*
 568                  * Check for already added items.
 569                  * There is a timing issue here that sometimes creates double postings.
 570                  * An unique index would help - but the limitations of MySQL (maximum size of index values) prevent this.
 571                  */
 572                 if (($item['uid'] == 0) && Post::exists(['uri-id' => $item['uri-id'], 'uid' => 0])) {
 573                         Logger::notice('Global item already stored.', ['uri-id' => $item['uri-id'], 'network' => $item['network']]);
 574                         return true;
 575                 }
 576
 577                 return false;
 578         }
 579
 580         /**
 581          * Check if the item array is valid
 582          *
 583          * @param array $item Item record
 584          * @return boolean item is valid
 585          */
 586         public static function isValid(array $item): bool
 587         {
 588                 // When there is no content then we don't post it
 589                 if (($item['body'] . $item['title'] == '') && empty($item['quote-uri-id']) && (empty($item['uri-id']) || !Post\Media::existsByURIId($item['uri-id']))) {
 590                         Logger::notice('No body, no title.');
 591                         return false;
 592                 }
 593
 594                 if (!empty($item['uid'])) {
 595                         $owner = User::getOwnerDataById($item['uid'], false);
 596                         if (!$owner) {
 597                                 Logger::warning('Missing item user owner data', ['uid' => $item['uid']]);
 598                                 return false;
 599                         }
 600
 601                         if ($owner['account_expired'] || $owner['account_removed']) {
 602                                 Logger::notice('Item user has been deleted/expired/removed', ['uid' => $item['uid'], 'deleted' => $owner['deleted'], 'account_expired' => $owner['account_expired'], 'account_removed' => $owner['account_removed']]);
 603                                 return false;
 604                         }
 605                 }
 606
 607                 if (!empty($item['author-id']) && Contact::isBlocked($item['author-id'])) {
 608                         Logger::notice('Author is blocked node-wide', ['author-link' => $item['author-link'], 'item-uri' => $item['uri']]);
 609                         return false;
 610                 }
 611
 612                 if (!empty($item['author-link']) && Network::isUrlBlocked($item['author-link'])) {
 613                         Logger::notice('Author server is blocked', ['author-link' => $item['author-link'], 'item-uri' => $item['uri']]);
 614                         return false;
 615                 }
 616
 617                 if (!empty($item['owner-id']) && Contact::isBlocked($item['owner-id'])) {
 618                         Logger::notice('Owner is blocked node-wide', ['owner-link' => $item['owner-link'], 'item-uri' => $item['uri']]);
 619                         return false;
 620                 }
 621
 622                 if (!empty($item['owner-link']) && Network::isUrlBlocked($item['owner-link'])) {
 623                         Logger::notice('Owner server is blocked', ['owner-link' => $item['owner-link'], 'item-uri' => $item['uri']]);
 624                         return false;
 625                 }
 626
 627                 if (!empty($item['uid']) && !self::isAllowedByUser($item, $item['uid'])) {
 628                         return false;
 629                 }
 630
 631                 if ($item['verb'] == Activity::FOLLOW) {
 632                         if (!$item['origin'] && ($item['author-id'] == Contact::getPublicIdByUserId($item['uid']))) {
 633                                 // Our own follow request can be relayed to us. We don't store it to avoid notification chaos.
 634                                 Logger::info("Follow: Don't store not origin follow request", ['parent-uri' => $item['parent-uri']]);
 635                                 return false;
 636                         }
 637
 638                         $condition = ['verb' => Activity::FOLLOW, 'uid' => $item['uid'],
 639                                 'parent-uri' => $item['parent-uri'], 'author-id' => $item['author-id']];
 640                         if (Post::exists($condition)) {
 641                                 // It happens that we receive multiple follow requests by the same author - we only store one.
 642                                 Logger::info('Follow: Found existing follow request from author', ['author-id' => $item['author-id'], 'parent-uri' => $item['parent-uri']]);
 643                                 return false;
 644                         }
 645                 }
 646
 647                 return true;
 648         }
 649
 650         /**
 651          * Check if the item array is too old
 652          *
 653          * @param array $item Item record
 654          * @return boolean item is too old
 655          */
 656         public static function isTooOld(array $item): bool
 657         {
 658                 // check for create date and expire time
 659                 $expire_interval = DI::config()->get('system', 'dbclean-expire-days', 0);
 660
 661                 $user = DBA::selectFirst('user', ['expire'], ['uid' => $item['uid']]);
 662                 if (DBA::isResult($user) && ($user['expire'] > 0) && (($user['expire'] < $expire_interval) || ($expire_interval == 0))) {
 663                         $expire_interval = $user['expire'];
 664                 }
 665
 666                 if (($expire_interval > 0) && !empty($item['created'])) {
 667                         $expire_date = time() - ($expire_interval * 86400);
 668                         $created_date = strtotime($item['created']);
 669                         if ($created_date < $expire_date) {
 670                                 Logger::notice('Item created before expiration interval.', [
 671                                         'created' => date('c', $created_date),
 672                                         'expired' => date('c', $expire_date),
 673                                         '$item' => $item
 674                                 ]);
 675                                 return true;
 676                         }
 677                 }
 678
 679                 return false;
 680         }
 681
 682         /**
 683          * Return the id of the given item array if it has been stored before
 684          *
 685          * @param array $item Item record
 686          * @return integer Item id or zero on error
 687          */
 688         private static function getDuplicateID(array $item): int
 689         {
 690                 if (empty($item['network']) || in_array($item['network'], Protocol::FEDERATED)) {
 691                         $condition = ['`uri-id` = ? AND `uid` = ? AND `network` IN (?, ?, ?, ?)',
 692                                 $item['uri-id'],
 693                                 $item['uid'],
 694                                 Protocol::ACTIVITYPUB,
 695                                 Protocol::DIASPORA,
 696                                 Protocol::DFRN,
 697                                 Protocol::OSTATUS
 698                         ];
 699                         $existing = Post::selectFirst(['id', 'network'], $condition);
 700                         if (DBA::isResult($existing)) {
 701                                 // We only log the entries with a different user id than 0. Otherwise we would have too many false positives
 702                                 if ($item['uid'] != 0) {
 703                                         Logger::notice('Item already existed for user', [
 704                                                 'uri-id' => $item['uri-id'],
 705                                                 'uid' => $item['uid'],
 706                                                 'network' => $item['network'],
 707                                                 'existing_id' => $existing['id'],
 708                                                 'existing_network' => $existing['network']
 709                                         ]);
 710                                 }
 711
 712                                 return $existing['id'];
 713                         }
 714                 }
 715                 return 0;
 716         }
 717
 718         /**
 719          * Fetch the uri-id of the parent for the given uri-id
 720          *
 721          * @param integer $uriid
 722          * @return integer
 723          */
 724         public static function getParent(int $uriid): int
 725         {
 726                 $thread_parent = Post::selectFirstPost(['thr-parent-id', 'gravity'], ['uri-id' => $uriid]);
 727                 if (empty($thread_parent)) {
 728                         return 0;
 729                 }
 730
 731                 if ($thread_parent['gravity'] == Item::GRAVITY_PARENT) {
 732                         return $uriid;
 733                 }
 734
 735                 return self::getParent($thread_parent['thr-parent-id']);
 736         }
 737
 738         /**
 739          * Fetch top-level parent data for the given item array
 740          *
 741          * @param array $item
 742          * @return array item array with parent data
 743          * @throws \Exception
 744          */
 745         private static function getTopLevelParent(array $item): array
 746         {
 747                 $fields = ['uid', 'uri', 'parent-uri', 'id', 'deleted',
 748                         'uri-id', 'parent-uri-id',
 749                         'allow_cid', 'allow_gid', 'deny_cid', 'deny_gid',
 750                         'wall', 'private', 'origin', 'author-id'];
 751                 $condition = ['uri-id' => [$item['thr-parent-id'], $item['parent-uri-id']], 'uid' => $item['uid']];
 752                 $params = ['order' => ['id' => false]];
 753                 $parent = Post::selectFirst($fields, $condition, $params);
 754
 755                 if (!DBA::isResult($parent) && Post::exists(['uri-id' => [$item['thr-parent-id'], $item['parent-uri-id']], 'uid' => 0])) {
 756                         $stored = Item::storeForUserByUriId($item['thr-parent-id'], $item['uid'], ['post-reason' => Item::PR_COMPLETION]);
 757                         if (!$stored && ($item['thr-parent-id'] != $item['parent-uri-id'])) {
 758                                 $stored = Item::storeForUserByUriId($item['parent-uri-id'], $item['uid'], ['post-reason' => Item::PR_COMPLETION]);
 759                         }
 760                         if ($stored) {
 761                                 Logger::info('Stored thread parent item for user', ['uri-id' => $item['thr-parent-id'], 'uid' => $item['uid'], 'stored' => $stored]);
 762                                 $parent = Post::selectFirst($fields, $condition, $params);
 763                         }
 764                 }
 765
 766                 if (!DBA::isResult($parent)) {
 767                         Logger::notice('item parent was not found - ignoring item', ['uri-id' => $item['uri-id'], 'thr-parent-id' => $item['thr-parent-id'], 'uid' => $item['uid'], 'callstack' => System::callstack(20)]);
 768                         return [];
 769                 }
 770
 771                 if ($parent['uri-id'] == $parent['parent-uri-id']) {
 772                         return $parent;
 773                 }
 774
 775                 $condition = ['uri-id' => $parent['parent-uri-id'],
 776                         'parent-uri-id' => $parent['parent-uri-id'],
 777                         'uid' => $parent['uid']];
 778                 $params = ['order' => ['id' => false]];
 779                 $toplevel_parent = Post::selectFirst($fields, $condition, $params);
 780
 781                 if (!DBA::isResult($toplevel_parent) && $item['origin']) {
 782                         $stored = Item::storeForUserByUriId($item['parent-uri-id'], $item['uid'], ['post-reason' => Item::PR_COMPLETION]);
 783                         Logger::info('Stored parent item for user', ['uri-id' => $item['parent-uri-id'], 'uid' => $item['uid'], 'stored' => $stored]);
 784                         $toplevel_parent = Post::selectFirst($fields, $condition, $params);
 785                 }
 786
 787                 if (!DBA::isResult($toplevel_parent)) {
 788                         Logger::notice('item top level parent was not found - ignoring item', ['parent-uri-id' => $parent['parent-uri-id'], 'uid' => $parent['uid']]);
 789                         return [];
 790                 }
 791
 792                 return $toplevel_parent;
 793         }
 794
 795         /**
 796          * Get the gravity for the given item array
 797          *
 798          * @param array $item
 799          * @return integer gravity
 800          */
 801         private static function getGravity(array $item): int
 802         {
 803                 $activity = DI::activity();
 804
 805                 if (isset($item['gravity'])) {
 806                         return intval($item['gravity']);
 807                 } elseif ($item['parent-uri-id'] === $item['uri-id']) {
 808                         return self::GRAVITY_PARENT;
 809                 } elseif ($activity->match($item['verb'], Activity::POST)) {
 810                         return self::GRAVITY_COMMENT;
 811                 } elseif ($activity->match($item['verb'], Activity::FOLLOW)) {
 812                         return self::GRAVITY_ACTIVITY;
 813                 } elseif ($activity->match($item['verb'], Activity::ANNOUNCE)) {
 814                         return self::GRAVITY_ACTIVITY;
 815                 }
 816
 817                 Logger::info('Unknown gravity for verb', ['verb' => $item['verb']]);
 818                 return self::GRAVITY_UNKNOWN;   // Should not happen
 819         }
 820
 821         private static function prepareOriginPost(array $item): array
 822         {
 823                 $item['wall'] = 1;
 824                 $item['origin'] = 1;
 825                 $item['network'] = Protocol::DFRN;
 826                 $item['protocol'] = Conversation::PARCEL_DIRECT;
 827                 $item['direction'] = Conversation::PUSH;
 828
 829                 $owner = User::getOwnerDataById($item['uid']);
 830
 831                 if (empty($item['contact-id'])) {
 832                         $item['contact-id'] = $owner['id'];
 833                 }
 834
 835                 if (empty($item['author-link']) && empty($item['author-id'])) {
 836                         $item['author-link']   = $owner['url'];
 837                         $item['author-name']   = $owner['name'];
 838                         $item['author-avatar'] = $owner['thumb'];
 839                 }
 840
 841                 if (empty($item['owner-link']) && empty($item['owner-id'])) {
 842                         $item['owner-link']   = $item['author-link'];
 843                         $item['owner-name']   = $item['author-name'];
 844                         $item['owner-avatar'] = $item['author-avatar'];
 845                 }
 846
 847                 // Setting the object type if not defined before
 848                 if (empty($item['object-type'])) {
 849                         $item['object-type'] = Activity\ObjectType::NOTE; // Default value
 850                         $objectdata = BBCode::getAttachedData($item['body']);
 851
 852                         if ($objectdata['type'] == 'link') {
 853                                 $item['object-type'] = Activity\ObjectType::BOOKMARK;
 854                         } elseif ($objectdata['type'] == 'video') {
 855                                 $item['object-type'] = Activity\ObjectType::VIDEO;
 856                         } elseif ($objectdata['type'] == 'photo') {
 857                                 $item['object-type'] = Activity\ObjectType::IMAGE;
 858                         }
 859                 }
 860
 861                 return $item;
 862         }
 863
 864         /**
 865          * Inserts item record
 866          *
 867          * @param array $item Item array to be inserted
 868          * @param int   $notify Notification (type?)
 869          * @param bool  $post_local (???)
 870          * @return int Zero means error, otherwise primary key (id) is being returned
 871          */
 872         public static function insert(array $item, int $notify = 0, bool $post_local = true): int
 873         {
 874                 $orig_item = $item;
 875
 876                 $priority = Worker::PRIORITY_HIGH;
 877
 878                 // If it is a posting where users should get notifications, then define it as wall posting
 879                 if ($notify) {
 880                         $item = self::prepareOriginPost($item);
 881
 882                         if (is_int($notify) && in_array($notify, Worker::PRIORITIES)) {
 883                                 $priority = $notify;
 884                         }
 885                 } else {
 886                         $item['network'] = trim(($item['network'] ?? '') ?: Protocol::PHANTOM);
 887                 }
 888
 889                 $uid = intval($item['uid']);
 890
 891                 $item['guid'] = self::guid($item, $notify);
 892                 $item['uri'] = substr(trim($item['uri'] ?? '') ?: self::newURI($item['guid']), 0, 255);
 893
 894                 // Store URI data
 895                 $item['uri-id'] = ItemURI::insert(['uri' => $item['uri'], 'guid' => $item['guid']]);
 896
 897                 // Backward compatibility: parent-uri used to be the direct parent uri.
 898                 // If it is provided without a thr-parent, it probably is the old behavior.
 899                 if (empty($item['thr-parent']) || empty($item['parent-uri'])) {
 900                         $item['thr-parent'] = trim($item['thr-parent'] ?? $item['parent-uri'] ?? $item['uri']);
 901                         $item['parent-uri'] = $item['thr-parent'];
 902                 }
 903
 904                 $item['thr-parent-id'] = ItemURI::getIdByURI($item['thr-parent']);
 905                 $item['parent-uri-id'] = ItemURI::getIdByURI($item['parent-uri']);
 906
 907                 // Store conversation data
 908                 $source = $item['source'] ?? '';
 909                 unset($item['conversation-uri']);
 910                 unset($item['conversation-href']);
 911                 unset($item['source']);
 912
 913                 /*
 914                  * Do we already have this item?
 915                  * We have to check several networks since Friendica posts could be repeated
 916                  * via OStatus (maybe Diasporsa as well)
 917                  */
 918                 $duplicate = self::getDuplicateID($item);
 919                 if ($duplicate) {
 920                         return $duplicate;
 921                 }
 922
 923                 // Additional duplicate checks
 924                 /// @todo Check why the first duplication check returns the item number and the second a 0
 925                 if (self::isDuplicate($item)) {
 926                         return 0;
 927                 }
 928
 929                 if (!isset($item['post-type'])) {
 930                         $item['post-type'] = empty($item['title']) ? self::PT_NOTE : self::PT_ARTICLE;
 931                 }
 932
 933                 $item['wall']          = intval($item['wall'] ?? 0);
 934                 $item['extid']         = trim($item['extid'] ?? '');
 935                 $item['author-name']   = trim($item['author-name'] ?? '');
 936                 $item['author-link']   = trim($item['author-link'] ?? '');
 937                 $item['author-avatar'] = trim($item['author-avatar'] ?? '');
 938                 $item['owner-name']    = trim($item['owner-name'] ?? '');
 939                 $item['owner-link']    = trim($item['owner-link'] ?? '');
 940                 $item['owner-avatar']  = trim($item['owner-avatar'] ?? '');
 941                 $item['received']      = (isset($item['received'])  ? DateTimeFormat::utc($item['received'])  : DateTimeFormat::utcNow());
 942                 $item['created']       = (isset($item['created'])   ? DateTimeFormat::utc($item['created'])   : $item['received']);
 943                 $item['edited']        = (isset($item['edited'])    ? DateTimeFormat::utc($item['edited'])    : $item['created']);
 944                 $item['changed']       = (isset($item['changed'])   ? DateTimeFormat::utc($item['changed'])   : $item['created']);
 945                 $item['commented']     = (isset($item['commented']) ? DateTimeFormat::utc($item['commented']) : $item['created']);
 946                 $item['title']         = substr(trim($item['title'] ?? ''), 0, 255);
 947                 $item['location']      = trim($item['location'] ?? '');
 948                 $item['coord']         = trim($item['coord'] ?? '');
 949                 $item['visible']       = (isset($item['visible']) ? intval($item['visible']) : 1);
 950                 $item['deleted']       = 0;
 951                 $item['verb']          = trim($item['verb'] ?? '');
 952                 $item['object-type']   = trim($item['object-type'] ?? '');
 953                 $item['object']        = trim($item['object'] ?? '');
 954                 $item['target-type']   = trim($item['target-type'] ?? '');
 955                 $item['target']        = trim($item['target'] ?? '');
 956                 $item['plink']         = substr(trim($item['plink'] ?? ''), 0, 255);
 957                 $item['allow_cid']     = trim($item['allow_cid'] ?? '');
 958                 $item['allow_gid']     = trim($item['allow_gid'] ?? '');
 959                 $item['deny_cid']      = trim($item['deny_cid'] ?? '');
 960                 $item['deny_gid']      = trim($item['deny_gid'] ?? '');
 961                 $item['private']       = intval($item['private'] ?? self::PUBLIC);
 962                 $item['body']          = trim($item['body'] ?? '');
 963                 $item['raw-body']      = trim($item['raw-body'] ?? $item['body']);
 964                 $item['app']           = trim($item['app'] ?? '');
 965                 $item['origin']        = intval($item['origin'] ?? 0);
 966                 $item['postopts']      = trim($item['postopts'] ?? '');
 967                 $item['resource-id']   = trim($item['resource-id'] ?? '');
 968                 $item['event-id']      = intval($item['event-id'] ?? 0);
 969                 $item['inform']        = trim($item['inform'] ?? '');
 970                 $item['file']          = trim($item['file'] ?? '');
 971
 972                 // Communities aren't working with the Diaspora protoccol
 973                 if (($uid != 0) && ($item['network'] == Protocol::DIASPORA)) {
 974                         $user = User::getById($uid, ['account-type']);
 975                         if ($user['account-type'] == Contact::TYPE_COMMUNITY) {
 976                                 Logger::info('Community posts are not supported via Diaspora');
 977                                 return 0;
 978                         }
 979                 }
 980
 981                 // Items cannot be stored before they happen ...
 982                 if ($item['created'] > DateTimeFormat::utcNow()) {
 983                         $item['created'] = DateTimeFormat::utcNow();
 984                 }
 985
 986                 // We haven't invented time travel by now.
 987                 if ($item['edited'] > DateTimeFormat::utcNow()) {
 988                         $item['edited'] = DateTimeFormat::utcNow();
 989                 }
 990
 991                 $item['plink'] = ($item['plink'] ?? '') ?: DI::baseUrl() . '/display/' . urlencode($item['guid']);
 992
 993                 $item['gravity'] = self::getGravity($item);
 994
 995                 $default = ['url' => $item['author-link'], 'name' => $item['author-name'],
 996                         'photo' => $item['author-avatar'], 'network' => $item['network']];
 997                 $item['author-id'] = ($item['author-id'] ?? 0) ?: Contact::getIdForURL($item['author-link'], 0, null, $default);
 998
 999                 $default = ['url' => $item['owner-link'], 'name' => $item['owner-name'],
1000                         'photo' => $item['owner-avatar'], 'network' => $item['network']];
1001                 $item['owner-id'] = ($item['owner-id'] ?? 0) ?: Contact::getIdForURL($item['owner-link'], 0, null, $default);
1002
1003                 $item['post-reason'] = self::getPostReason($item);
1004
1005                 // Ensure that there is an avatar cache
1006                 Contact::checkAvatarCache($item['author-id']);
1007                 Contact::checkAvatarCache($item['owner-id']);
1008
1009                 $item['contact-id'] = self::contactId($item);
1010
1011                 if (!empty($item['direction']) && in_array($item['direction'], [Conversation::PUSH, Conversation::RELAY]) &&
1012                         empty($item['origin']) && self::isTooOld($item)) {
1013                         Logger::info('Item is too old', ['item' => $item]);
1014                         return 0;
1015                 }
1016
1017                 if (!self::isValid($item)) {
1018                         return 0;
1019                 }
1020
1021                 if ($item['gravity'] !== self::GRAVITY_PARENT) {
1022                         $toplevel_parent = self::getTopLevelParent($item);
1023                         if (empty($toplevel_parent)) {
1024                                 return 0;
1025                         }
1026
1027                         // If the thread originated from this node, we check the permission against the thread starter
1028                         $condition = ['uri-id' => $toplevel_parent['uri-id'], 'wall' => true];
1029                         $localTopLevelParent = Post::selectFirst(['uid'], $condition);
1030                         if (!empty($localTopLevelParent['uid']) && !self::isAllowedByUser($item, $localTopLevelParent['uid'])) {
1031                                 return 0;
1032                         }
1033
1034                         $parent_id             = $toplevel_parent['id'];
1035                         $item['parent-uri']    = $toplevel_parent['uri'];
1036                         $item['parent-uri-id'] = $toplevel_parent['uri-id'];
1037                         $item['deleted']       = $toplevel_parent['deleted'];
1038                         $item['wall']          = $toplevel_parent['wall'];
1039
1040                         // Reshares have to keep their permissions to allow forums to work
1041                         if (!$item['origin'] || ($item['verb'] != Activity::ANNOUNCE)) {
1042                                 $item['allow_cid']     = $toplevel_parent['allow_cid'];
1043                                 $item['allow_gid']     = $toplevel_parent['allow_gid'];
1044                                 $item['deny_cid']      = $toplevel_parent['deny_cid'];
1045                                 $item['deny_gid']      = $toplevel_parent['deny_gid'];
1046                         }
1047
1048                         $parent_origin         = $toplevel_parent['origin'];
1049
1050                         // Don't federate received participation messages
1051                         if ($item['verb'] != Activity::FOLLOW) {
1052                                 $item['wall'] = $toplevel_parent['wall'];
1053                         } else {
1054                                 $item['wall'] = false;
1055                                 // Participations are technical messages, so they are set to "seen" automatically
1056                                 $item['unseen'] = false;
1057                         }
1058
1059                         /*
1060                          * If the parent is private, force privacy for the entire conversation
1061                          * This differs from the above settings as it subtly allows comments from
1062                          * email correspondents to be private even if the overall thread is not.
1063                          */
1064                         if ($toplevel_parent['private']) {
1065                                 $item['private'] = $toplevel_parent['private'];
1066                         }
1067
1068                         // If its a post that originated here then tag the thread as "mention"
1069                         if ($item['origin'] && $item['uid']) {
1070                                 DBA::update('post-thread-user', ['mention' => true], ['uri-id' => $item['parent-uri-id'], 'uid' => $item['uid']]);
1071                                 Logger::info('tagged thread as mention', ['parent' => $parent_id, 'parent-uri-id' => $item['parent-uri-id'], 'uid' => $item['uid']]);
1072                         }
1073
1074                         // Update the contact relations
1075                         Contact\Relation::store($toplevel_parent['author-id'], $item['author-id'], $item['created']);
1076                 } else {
1077                         $parent_id = 0;
1078                         $parent_origin = $item['origin'];
1079
1080                         if ($item['wall'] && empty($item['conversation'])) {
1081                                 $item['conversation'] = $item['parent-uri'] . '#context';
1082                         }
1083                 }
1084
1085                 $item['parent-uri-id'] = ItemURI::getIdByURI($item['parent-uri']);
1086                 $item['thr-parent-id'] = ItemURI::getIdByURI($item['thr-parent']);
1087
1088                 if (!empty($item['conversation']) && empty($item['conversation-id'])) {
1089                         $item['conversation-id'] = ItemURI::getIdByURI($item['conversation']);
1090                 }
1091
1092                 // Is this item available in the global items (with uid=0)?
1093                 if ($item['uid'] == 0) {
1094                         $item['global'] = true;
1095
1096                         // Set the global flag on all items if this was a global item entry
1097                         Post::update(['global' => true], ['uri-id' => $item['uri-id']]);
1098                 } else {
1099                         $item['global'] = Post::exists(['uid' => 0, 'uri-id' => $item['uri-id']]);
1100                 }
1101
1102                 // ACL settings
1103                 if (!empty($item['allow_cid'] . $item['allow_gid'] . $item['deny_cid'] . $item['deny_gid'])) {
1104                         $item['private'] = self::PRIVATE;
1105                 }
1106
1107                 if ($notify && $post_local) {
1108                         $item['edit'] = false;
1109                         $item['parent'] = $parent_id;
1110
1111                         // Trigger automatic reactions for addons
1112                         if (!isset($item['api_source'])) {
1113                                 $item['api_source'] = true;
1114                         }
1115
1116                         // We have to tell the hooks who we are - this really should be improved
1117                         if (!DI::userSession()->getLocalUserId()) {
1118                                 $_SESSION['authenticated'] = true;
1119                                 $_SESSION['uid'] = $uid;
1120                                 $dummy_session = true;
1121                         } else {
1122                                 $dummy_session = false;
1123                         }
1124
1125                         Hook::callAll('post_local', $item);
1126
1127                         if ($dummy_session) {
1128                                 unset($_SESSION['authenticated']);
1129                                 unset($_SESSION['uid']);
1130                         }
1131                 } elseif (!$notify) {
1132                         Hook::callAll('post_remote', $item);
1133                 }
1134
1135                 if (!empty($item['cancel'])) {
1136                         Logger::notice('post cancelled by addon.');
1137                         return 0;
1138                 }
1139
1140                 if (empty($item['vid']) && !empty($item['verb'])) {
1141                         $item['vid'] = Verb::getID($item['verb']);
1142                 }
1143
1144                 // Creates or assigns the permission set
1145                 $item['psid'] = DI::permissionSet()->selectOrCreate(
1146                         DI::permissionSetFactory()->createFromString(
1147                                 $item['uid'],
1148                                 $item['allow_cid'],
1149                                 $item['allow_gid'],
1150                                 $item['deny_cid'],
1151                                 $item['deny_gid']
1152                 ))->id;
1153
1154                 if (!empty($item['extid'])) {
1155                         $item['external-id'] = ItemURI::getIdByURI($item['extid']);
1156                 }
1157
1158                 if ($item['verb'] == Activity::ANNOUNCE) {
1159                         self::setOwnerforResharedItem($item);
1160                 }
1161
1162                 if (isset($item['attachments'])) {
1163                         foreach ($item['attachments'] as $attachment) {
1164                                 $attachment['uri-id'] = $item['uri-id'];
1165                                 Post\Media::insert($attachment);
1166                         }
1167                         unset($item['attachments']);
1168                 }
1169
1170                 if (empty($item['quote-uri-id'])) {
1171                         $quote_id = self::getQuoteUriId($item['body']);
1172                         if (!empty($quote_id)) {
1173                                 // This is one of these "should not happen" situations.
1174                                 // The protocol implementations should already have done this job.
1175                                 Logger::notice('Quote-uri-id detected in post', ['id' => $quote_id, 'guid' => $item['guid'], 'uri-id' => $item['uri-id'], 'callstack' => System::callstack(20)]);
1176                                 $item['quote-uri-id'] = $quote_id;
1177                         }
1178                 }
1179
1180                 if (!empty($item['quote-uri-id'])) {
1181                         $item['raw-body'] = BBCode::removeSharedData($item['raw-body']);
1182                         $item['body']     = BBCode::removeSharedData($item['body']);
1183                 }
1184
1185                 Post\Media::insertFromAttachmentData($item['uri-id'], $item['body']);
1186
1187                 // Remove all media attachments from the body and store them in the post-media table
1188                 $item['raw-body'] = Post\Media::insertFromBody($item['uri-id'], $item['raw-body']);
1189                 $item['raw-body'] = self::setHashtags($item['raw-body']);
1190
1191                 Post\Media::insertFromRelevantUrl($item['uri-id'], $item['raw-body']);
1192
1193                 // Check for hashtags in the body and repair or add hashtag links
1194                 $item['body'] = self::setHashtags($item['body']);
1195
1196                 $item['language'] = self::getLanguage($item);
1197
1198                 $notify_type = Delivery::POST;
1199
1200                 // Filling item related side tables
1201                 if (!empty($item['attach'])) {
1202                         Post\Media::insertFromAttachment($item['uri-id'], $item['attach']);
1203                 }
1204
1205                 if (empty($item['event-id'])) {
1206                         unset($item['event-id']);
1207
1208                         $ev = Event::fromBBCode($item['body']);
1209                         if ((!empty($ev['desc']) || !empty($ev['summary'])) && !empty($ev['start'])) {
1210                                 Logger::info('Event found.');
1211                                 $ev['cid']       = $item['contact-id'];
1212                                 $ev['uid']       = $item['uid'];
1213                                 $ev['uri']       = $item['uri'];
1214                                 $ev['edited']    = $item['edited'];
1215                                 $ev['private']   = $item['private'];
1216                                 $ev['guid']      = $item['guid'];
1217                                 $ev['plink']     = $item['plink'];
1218                                 $ev['network']   = $item['network'];
1219                                 $ev['protocol']  = $item['protocol'] ?? Conversation::PARCEL_UNKNOWN;
1220                                 $ev['direction'] = $item['direction'] ?? Conversation::UNKNOWN;
1221                                 $ev['source']    = $item['source'] ?? '';
1222
1223                                 $event = DBA::selectFirst('event', ['id'], ['uri' => $item['uri'], 'uid' => $item['uid']]);
1224                                 if (DBA::isResult($event)) {
1225                                         $ev['id'] = $event['id'];
1226                                 }
1227
1228                                 $event_id = Event::store($ev);
1229                                 $item = Event::getItemArrayForImportedId($event_id, $item);
1230
1231                                 Logger::info('Event was stored', ['id' => $event_id]);
1232                         }
1233                 }
1234
1235                 if (empty($item['causer-id'])) {
1236                         unset($item['causer-id']);
1237                 }
1238
1239                 if (in_array($item['network'], [Protocol::ACTIVITYPUB, Protocol::DFRN])) {
1240                         $content_warning = BBCode::getAbstract($item['body'], Protocol::ACTIVITYPUB);
1241                         if (!empty($content_warning) && empty($item['content-warning'])) {
1242                                 $item['content-warning'] = BBCode::toPlaintext($content_warning);
1243                         }
1244                 }
1245
1246                 Post::insert($item['uri-id'], $item);
1247
1248                 if ($item['gravity'] == self::GRAVITY_PARENT) {
1249                         Post\Thread::insert($item['uri-id'], $item);
1250                 }
1251
1252                 if (!in_array($item['verb'], self::ACTIVITIES)) {
1253                         Post\Content::insert($item['uri-id'], $item);
1254                 }
1255
1256                 // Create Diaspora signature
1257                 if ($item['origin'] && empty($item['diaspora_signed_text']) && ($item['gravity'] != self::GRAVITY_PARENT)) {
1258                         $signed = Diaspora::createCommentSignature($item);
1259                         if (!empty($signed)) {
1260                                 $item['diaspora_signed_text'] = json_encode($signed);
1261                         }
1262                 }
1263
1264                 if (!empty($item['diaspora_signed_text'])) {
1265                         DBA::replace('diaspora-interaction', ['uri-id' => $item['uri-id'], 'interaction' => $item['diaspora_signed_text']]);
1266                 }
1267
1268                 // Attached file links
1269                 if (!empty($item['file'])) {
1270                         Post\Category::storeTextByURIId($item['uri-id'], $item['uid'], $item['file']);
1271                 }
1272
1273                 // Delivery relevant data
1274                 $delivery_data = Post\DeliveryData::extractFields($item);
1275
1276                 if (!empty($item['origin']) || !empty($item['wall']) || !empty($delivery_data['postopts']) || !empty($delivery_data['inform'])) {
1277                         Post\DeliveryData::insert($item['uri-id'], $delivery_data);
1278                 }
1279
1280                 // Store tags from the body if this hadn't been handled previously in the protocol classes
1281                 if (!Tag::existsForPost($item['uri-id'])) {
1282                         Tag::storeFromBody($item['uri-id'], $item['body']);
1283                 }
1284
1285                 $condition = ['uri-id' => $item['uri-id'], 'uid' => $item['uid']];
1286                 if (Post::exists($condition)) {
1287                         Logger::notice('Item is already inserted - aborting', $condition);
1288                         return 0;
1289                 }
1290
1291                 $post_user_id = Post\User::insert($item['uri-id'], $item['uid'], $item);
1292                 if (!$post_user_id) {
1293                         Logger::notice('Post-User is already inserted - aborting', ['uid' => $item['uid'], 'uri-id' => $item['uri-id']]);
1294                         return 0;
1295                 }
1296
1297                 if ($item['gravity'] == self::GRAVITY_PARENT) {
1298                         $item['post-user-id'] = $post_user_id;
1299                         Post\ThreadUser::insert($item['uri-id'], $item['uid'], $item);
1300                 }
1301
1302                 Logger::notice('created item', ['post-id' => $post_user_id, 'uid' => $item['uid'], 'network' => $item['network'], 'uri-id' => $item['uri-id'], 'guid' => $item['guid']]);
1303
1304                 $posted_item = Post::selectFirst(self::ITEM_FIELDLIST, ['post-user-id' => $post_user_id]);
1305                 if (!DBA::isResult($posted_item)) {
1306                         // On failure store the data into a spool file so that the "SpoolPost" worker can try again later.
1307                         Logger::warning('Could not store item. it will be spooled', ['id' => $post_user_id]);
1308                         self::spool($orig_item);
1309                         return 0;
1310                 }
1311
1312                 // update the commented timestamp on the parent
1313                 if (DI::config()->get('system', 'like_no_comment')) {
1314                         // Update when it is a comment
1315                         $update_commented = in_array($posted_item['gravity'], [self::GRAVITY_PARENT, self::GRAVITY_COMMENT]);
1316                 } else {
1317                         // Update when it isn't a follow or tag verb
1318                         $update_commented = !in_array($posted_item['verb'], [Activity::FOLLOW, Activity::TAG]);
1319                 }
1320
1321                 if ($update_commented) {
1322                         $fields = ['commented' => DateTimeFormat::utcNow(), 'changed' => DateTimeFormat::utcNow()];
1323                 } else {
1324                         $fields = ['changed' => DateTimeFormat::utcNow()];
1325                 }
1326
1327                 Post::update($fields, ['uri-id' => $posted_item['parent-uri-id'], 'uid' => $posted_item['uid']]);
1328
1329                 // In that function we check if this is a forum post. Additionally we delete the item under certain circumstances
1330                 if (self::tagDeliver($posted_item['uid'], $post_user_id)) {
1331                         // Get the user information for the logging
1332                         $user = User::getById($uid);
1333
1334                         Logger::notice('Item had been deleted', ['id' => $post_user_id, 'user' => $uid, 'account-type' => $user['account-type']]);
1335                         return 0;
1336                 }
1337
1338                 if ($notify) {
1339                         if (!\Friendica\Content\Feature::isEnabled($posted_item['uid'], 'explicit_mentions') && ($posted_item['gravity'] == self::GRAVITY_COMMENT)) {
1340                                 Tag::createImplicitMentions($posted_item['uri-id'], $posted_item['thr-parent-id']);
1341                         }
1342                         Hook::callAll('post_local_end', $posted_item);
1343                 } else {
1344                         Hook::callAll('post_remote_end', $posted_item);
1345                 }
1346
1347                 if ($posted_item['gravity'] === self::GRAVITY_PARENT) {
1348                         self::addShadow($post_user_id);
1349                 } else {
1350                         self::addShadowPost($post_user_id);
1351                 }
1352
1353                 self::updateContact($posted_item);
1354
1355                 Post\UserNotification::setNotification($posted_item['uri-id'], $posted_item['uid']);
1356
1357                 // Distribute items to users who subscribed to their tags
1358                 self::distributeByTags($posted_item);
1359
1360                 // Automatically reshare the item if the "remote_self" option is selected
1361                 self::autoReshare($posted_item);
1362
1363                 $transmit = $notify || ($posted_item['visible'] && ($parent_origin || $posted_item['origin']));
1364
1365                 if ($transmit) {
1366                         // Don't relay participation messages
1367                         if (($posted_item['verb'] == Activity::FOLLOW) &&
1368                                 (!$posted_item['origin'] || ($posted_item['author-id'] != Contact::getPublicIdByUserId($uid)))) {
1369                                 Logger::info('Participation messages will not be relayed', ['item' => $posted_item['id'], 'uri' => $posted_item['uri'], 'verb' => $posted_item['verb']]);
1370                                 $transmit = false;
1371                         }
1372                 }
1373
1374                 if (!empty($source) && ($transmit || DI::config()->get('debug', 'store_source'))) {
1375                         Post\Activity::insert($item['uri-id'], $source);
1376                 }
1377
1378                 if ($transmit) {
1379                         Worker::add(['priority' => $priority, 'dont_fork' => true], 'Notifier', $notify_type, (int)$posted_item['uri-id'], (int)$posted_item['uid']);
1380                 }
1381
1382                 // Fill the cache with the rendered content.
1383                 if (in_array($posted_item['gravity'], [self::GRAVITY_PARENT, self::GRAVITY_COMMENT]) && ($posted_item['uid'] == 0)) {
1384                         self::updateDisplayCache($posted_item['uri-id']);
1385                 }
1386
1387                 return $post_user_id;
1388         }
1389
1390         /**
1391          * Fetch the post reason for a given item array
1392          *
1393          * @param array $item
1394          *
1395          * @return integer
1396          */
1397         public static function getPostReason(array $item): int
1398         {
1399                 $actor = ($item['gravity'] == self::GRAVITY_PARENT) ? $item['owner-id'] : $item['author-id'];
1400                 if (empty($item['origin']) && ($item['uid'] != 0) && Contact::isSharing($actor, $item['uid'])) {
1401                         return self::PR_FOLLOWER;
1402                 }
1403
1404                 if (!empty($item['origin']) && empty($item['post-reason'])) {
1405                         return self::PR_LOCAL;
1406                 }
1407
1408                 return $item['post-reason'] ?? self::PR_NONE;
1409         }
1410
1411         /**
1412          * Update the display cache
1413          *
1414          * @param integer $uri_id
1415          * @return void
1416          */
1417         public static function updateDisplayCache(int $uri_id)
1418         {
1419                 $item = Post::selectFirst(self::DISPLAY_FIELDLIST, ['uri-id' => $uri_id]);
1420                 self::prepareBody($item, false, false, true);
1421         }
1422
1423         /**
1424          * Change the owner of a parent item if it had been shared by a forum
1425          *
1426          * (public) forum posts in the new format consist of the regular post by the author
1427          * followed by an announce message sent from the forum account.
1428          * Changing the owner helps in grouping forum posts.
1429          *
1430          * @param array $item
1431          * @return void
1432          */
1433         private static function setOwnerforResharedItem(array $item)
1434         {
1435                 $parent = Post::selectFirst(['id', 'causer-id', 'owner-id', 'author-id', 'author-link', 'origin', 'post-reason'],
1436                         ['uri-id' => $item['thr-parent-id'], 'uid' => $item['uid']]);
1437                 if (!DBA::isResult($parent)) {
1438                         Logger::error('Parent not found', ['uri-id' => $item['thr-parent-id'], 'uid' => $item['uid']]);
1439                         return;
1440                 }
1441
1442                 $author = Contact::selectFirst(['url', 'contact-type', 'network'], ['id' => $item['author-id']]);
1443                 if (!DBA::isResult($author)) {
1444                         Logger::error('Author not found', ['id' => $item['author-id']]);
1445                         return;
1446                 }
1447
1448                 $self_contact = Contact::selectFirst(['id'], ['uid' => $item['uid'], 'self' => true]);
1449                 $self = !empty($self_contact) ? $self_contact['id'] : 0;
1450
1451                 $cid = Contact::getIdForURL($author['url'], $item['uid']);
1452                 if (empty($cid) || (!Contact::isSharing($cid, $item['uid']) && ($cid != $self))) {
1453                         Logger::info('The resharer is not a following contact: quit', ['resharer' => $author['url'], 'uid' => $item['uid'], 'cid' => $cid]);
1454                         return;
1455                 }
1456
1457                 if ($author['contact-type'] != Contact::TYPE_COMMUNITY) {
1458                         if ($parent['post-reason'] == self::PR_ANNOUNCEMENT) {
1459                                 Logger::info('The parent is already marked as announced: quit', ['causer' => $parent['causer-id'], 'owner' => $parent['owner-id'], 'author' => $parent['author-id'], 'uid' => $item['uid']]);
1460                                 return;
1461                         }
1462
1463                         if (Contact::isSharing($parent['owner-id'], $item['uid'])) {
1464                                 Logger::info('The resharer is no forum: quit', ['resharer' => $item['author-id'], 'owner' => $parent['owner-id'], 'author' => $parent['author-id'], 'uid' => $item['uid']]);
1465                                 return;
1466                         }
1467                 }
1468
1469                 self::update(['post-reason' => self::PR_ANNOUNCEMENT, 'causer-id' => $item['author-id']], ['id' => $parent['id']]);
1470                 Logger::info('Set announcement post-reason', ['uri-id' => $item['uri-id'], 'thr-parent-id' => $item['thr-parent-id'], 'uid' => $item['uid']]);
1471         }
1472
1473         /**
1474          * Distribute the given item to users who subscribed to their tags
1475          *
1476          * @param array $item     Processed item
1477          */
1478         private static function distributeByTags(array $item)
1479         {
1480                 if (($item['uid'] != 0) || ($item['gravity'] != self::GRAVITY_PARENT) || !in_array($item['network'], Protocol::FEDERATED)) {
1481                         return;
1482                 }
1483
1484                 $uids = Tag::getUIDListByURIId($item['uri-id']);
1485                 foreach ($uids as $uid) {
1486                         $stored = self::storeForUserByUriId($item['uri-id'], $uid, ['post-reason' => self::PR_TAG]);
1487                         Logger::info('Stored item for users', ['uri-id' => $item['uri-id'], 'uid' => $uid, 'stored' => $stored]);
1488                 }
1489         }
1490
1491         /**
1492          * Distributes public items to the receivers
1493          *
1494          * @param integer $itemid      Item ID that should be added
1495          * @param string  $signed_text Original text (for Diaspora signatures), JSON encoded.
1496          * @throws \Exception
1497          */
1498         public static function distribute(int $itemid, string $signed_text = '')
1499         {
1500                 $condition = ["`id` IN (SELECT `parent` FROM `post-user-view` WHERE `id` = ?)", $itemid];
1501                 $parent = Post::selectFirst(['owner-id'], $condition);
1502                 if (!DBA::isResult($parent)) {
1503                         Logger::warning('Item not found', ['condition' => $condition]);
1504                         return;
1505                 }
1506
1507                 // Only distribute public items from native networks
1508                 $condition = ['id' => $itemid, 'uid' => 0,
1509                         'network' => array_merge(Protocol::FEDERATED ,['']),
1510                         'visible' => true, 'deleted' => false, 'private' => [self::PUBLIC, self::UNLISTED]];
1511                 $item = Post::selectFirst(array_merge(self::ITEM_FIELDLIST, ['protocol']), $condition);
1512                 if (!DBA::isResult($item)) {
1513                         Logger::warning('Item not found', ['condition' => $condition]);
1514                         return;
1515                 }
1516
1517                 $origin = $item['origin'];
1518
1519                 $users = [];
1520
1521                 /// @todo add a field "pcid" in the contact table that referrs to the public contact id.
1522                 $owner = DBA::selectFirst('contact', ['url', 'nurl', 'alias'], ['id' => $parent['owner-id']]);
1523                 if (!DBA::isResult($owner)) {
1524                         return;
1525                 }
1526
1527                 $condition = ['nurl' => $owner['nurl'], 'rel' => [Contact::SHARING, Contact::FRIEND]];
1528                 $contacts = DBA::select('contact', ['uid'], $condition);
1529                 while ($contact = DBA::fetch($contacts)) {
1530                         if ($contact['uid'] == 0) {
1531                                 continue;
1532                         }
1533
1534                         $users[$contact['uid']] = $contact['uid'];
1535                 }
1536                 DBA::close($contacts);
1537
1538                 $condition = ['alias' => $owner['url'], 'rel' => [Contact::SHARING, Contact::FRIEND]];
1539                 $contacts = DBA::select('contact', ['uid'], $condition);
1540                 while ($contact = DBA::fetch($contacts)) {
1541                         if ($contact['uid'] == 0) {
1542                                 continue;
1543                         }
1544
1545                         $users[$contact['uid']] = $contact['uid'];
1546                 }
1547                 DBA::close($contacts);
1548
1549                 if (!empty($owner['alias'])) {
1550                         $condition = ['nurl' => Strings::normaliseLink($owner['alias']), 'rel' => [Contact::SHARING, Contact::FRIEND]];
1551                         $contacts = DBA::select('contact', ['uid'], $condition);
1552                         while ($contact = DBA::fetch($contacts)) {
1553                                 if ($contact['uid'] == 0) {
1554                                         continue;
1555                                 }
1556
1557                                 $users[$contact['uid']] = $contact['uid'];
1558                         }
1559                         DBA::close($contacts);
1560                 }
1561
1562                 $origin_uid = 0;
1563
1564                 if ($item['uri-id'] != $item['parent-uri-id']) {
1565                         $parents = Post::select(['uid', 'origin'], ["`uri-id` = ? AND `uid` != 0", $item['parent-uri-id']]);
1566                         while ($parent = Post::fetch($parents)) {
1567                                 $users[$parent['uid']] = $parent['uid'];
1568                                 if ($parent['origin'] && !$origin) {
1569                                         $origin_uid = $parent['uid'];
1570                                 }
1571                         }
1572                         DBA::close($parents);
1573                 }
1574
1575                 foreach ($users as $uid) {
1576                         if ($origin_uid == $uid) {
1577                                 $item['diaspora_signed_text'] = $signed_text;
1578                         }
1579                         $item['post-reason'] = self::PR_DISTRIBUTE;
1580                         self::storeForUser($item, $uid);
1581                 }
1582         }
1583
1584         /**
1585          * Store a public item defined by their URI-ID for the given users
1586          *
1587          * @param integer $uri_id     URI-ID of the given item
1588          * @param integer $uid        The user that will receive the item entry
1589          * @param array   $fields     Additional fields to be stored
1590          * @param integer $source_uid User id of the source post
1591          * @return integer stored item id
1592          */
1593         public static function storeForUserByUriId(int $uri_id, int $uid, array $fields = [], int $source_uid = 0): int
1594         {
1595                 if ($uid == $source_uid) {
1596                         Logger::warning('target UID must not be be equal to the source UID', ['uri-id' => $uri_id, 'uid' => $uid]);
1597                         return 0;
1598                 }
1599
1600                 $item = Post::selectFirst(array_merge(self::ITEM_FIELDLIST, ['protocol']), ['uri-id' => $uri_id, 'uid' => $source_uid]);
1601                 if (!DBA::isResult($item)) {
1602                         Logger::warning('Item could not be fetched', ['uri-id' => $uri_id, 'uid' => $source_uid]);
1603                         return 0;
1604                 }
1605
1606                 if (($uid != 0) && ($item['gravity'] == self::GRAVITY_PARENT)) {
1607                         $owner = User::getOwnerDataById($uid);
1608                         if (($owner['contact-type'] == User::ACCOUNT_TYPE_COMMUNITY) && !Tag::isMentioned($uri_id, $owner['url'])) {
1609                                 Logger::info('Target user is a forum but is not mentioned here, thread will not be stored', ['uid' => $uid, 'uri-id' => $uri_id]);
1610                                 return 0;
1611                         }
1612                 }
1613
1614                 if (($source_uid == 0) && (($item['private'] == self::PRIVATE) || !in_array($item['network'], Protocol::FEDERATED))) {
1615                         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']]);
1616                         return 0;
1617                 }
1618
1619                 $item['post-reason'] = self::PR_STORED;
1620
1621                 $item = array_merge($item, $fields);
1622
1623                 if (($uid != 0) && Contact::isSharing(($item['gravity'] == Item::GRAVITY_PARENT) ? $item['owner-id'] : $item['author-id'], $uid)) {
1624                         $item['post-reason'] = self::PR_FOLLOWER;
1625                 }
1626
1627                 $is_reshare = ($item['gravity'] == self::GRAVITY_ACTIVITY) && ($item['verb'] == Activity::ANNOUNCE);
1628
1629                 if (($uid != 0) && (($item['gravity'] == self::GRAVITY_PARENT) || $is_reshare) &&
1630                         DI::pConfig()->get($uid, 'system', 'accept_only_sharer') == self::COMPLETION_NONE &&
1631                         !in_array($item['post-reason'], [self::PR_FOLLOWER, self::PR_TAG, self::PR_TO, self::PR_CC])) {
1632                         Logger::info('Contact is not a follower, thread will not be stored', ['author' => $item['author-link'], 'uid' => $uid, 'uri-id' => $uri_id, 'post-reason' => $item['post-reason']]);
1633                         return 0;
1634                 }
1635
1636                 $causer = $item['causer-id'] ?: $item['author-id'];
1637
1638                 if (($uri_id != $item['parent-uri-id']) && ($item['gravity'] == self::GRAVITY_COMMENT) && !Post::exists(['uri-id' => $item['parent-uri-id'], 'uid' => $uid])) {
1639                         if (!self::fetchParent($item['parent-uri-id'], $uid, $causer)) {
1640                                 Logger::info('Parent post had not been added', ['uri-id' => $item['parent-uri-id'], 'uid' => $uid, 'causer' => $causer]);
1641                                 return 0;
1642                         }
1643                         Logger::info('Fetched parent post', ['uri-id' => $item['parent-uri-id'], 'uid' => $uid, 'causer' => $causer]);
1644                 } elseif (($uri_id != $item['thr-parent-id']) && $is_reshare && !Post::exists(['uri-id' => $item['thr-parent-id'], 'uid' => $uid])) {
1645                         if (!self::fetchParent($item['thr-parent-id'], $uid, $causer)) {
1646                                 Logger::info('Thread parent had not been added', ['uri-id' => $item['thr-parent-id'], 'uid' => $uid, 'causer' => $causer]);
1647                                 return 0;
1648                         }
1649                         Logger::info('Fetched thread parent', ['uri-id' => $item['thr-parent-id'], 'uid' => $uid, 'causer' => $causer]);
1650                 }
1651
1652                 $stored = self::storeForUser($item, $uid);
1653                 Logger::info('Item stored for user', ['uri-id' => $item['uri-id'], 'uid' => $uid, 'causer' => $causer, 'source-uid' => $source_uid, 'stored' => $stored]);
1654                 return $stored;
1655         }
1656
1657         /**
1658          * Fetch the parent with the given uri-id
1659          *
1660          * @param integer $uri_id
1661          * @param integer $uid
1662          * @param integer $causer
1663          *
1664          * @return integer
1665          */
1666         private static function fetchParent(int $uri_id, int $uid, int $causer): int
1667         {
1668                 // Fetch the origin user for the post
1669                 $origin_uid = self::GetOriginUidForUriId($uri_id, $uid);
1670                 if (is_null($origin_uid)) {
1671                         Logger::info('Origin item was not found', ['uid' => $uid, 'uri-id' => $uri_id]);
1672                         return 0;
1673                 }
1674
1675                 return self::storeForUserByUriId($uri_id, $uid, ['causer-id' => $causer, 'post-reason' => self::PR_FETCHED], $origin_uid);
1676         }
1677
1678         /**
1679          * Returns the origin uid of a post if the given user is allowed to see it.
1680          *
1681          * @param int $uriid
1682          * @param int $uid
1683          * @return int
1684          */
1685         private static function GetOriginUidForUriId(int $uriid, int $uid)
1686         {
1687                 if (Post::exists(['uri-id' => $uriid, 'uid' => $uid])) {
1688                         return $uid;
1689                 }
1690
1691                 $post = Post::selectFirst(['uid', 'allow_cid', 'allow_gid', 'deny_cid', 'deny_gid', 'private'], ['uri-id' => $uriid, 'origin' => true]);
1692                 if (!empty($post)) {
1693                         if (in_array($post['private'], [Item::PUBLIC, Item::UNLISTED])) {
1694                                 return $post['uid'];
1695                         }
1696
1697                         $pcid = Contact::getPublicIdByUserId($uid);
1698                         if (empty($pcid)) {
1699                                 return null;
1700                         }
1701
1702                         foreach (Item::enumeratePermissions($post, true) as $receiver) {
1703                                 if ($receiver == $pcid) {
1704                                         return $post['uid'];
1705                                 }
1706                         }
1707
1708                         return null;
1709                 }
1710
1711                 if (Post::exists(['uri-id' => $uriid, 'uid' => 0])) {
1712                         return 0;
1713                 }
1714
1715                 // When the post belongs to a a forum then all forum users are allowed to access it
1716                 foreach (Tag::getByURIId($uriid, [Tag::MENTION, Tag::EXCLUSIVE_MENTION]) as $tag) {
1717                         if (DBA::exists('contact', ['uid' => $uid, 'nurl' => Strings::normaliseLink($tag['url']), 'contact-type' => Contact::TYPE_COMMUNITY])) {
1718                                 $target_uid = User::getIdForURL($tag['url']);
1719                                 if (!empty($target_uid)) {
1720                                         return $target_uid;
1721                                 }
1722                         }
1723                 }
1724
1725                 return null;
1726         }
1727
1728         /**
1729          * Store a public item array for the given users
1730          *
1731          * @param array   $item   The item entry that will be stored
1732          * @param integer $uid    The user that will receive the item entry
1733          * @return integer stored item id
1734          * @throws \Exception
1735          */
1736         private static function storeForUser(array $item, int $uid): int
1737         {
1738                 $post = Post::selectFirst(['id'], ['uri-id' => $item['uri-id'], 'uid' => $uid]);
1739                 if (!empty($post['id'])) {
1740                         if (!empty($item['event-id'])) {
1741                                 $event_post = Post::selectFirst(['event-id'], ['uri-id' => $item['uri-id'], 'uid' => $uid]);
1742                                 if (!empty($event_post['event-id'])) {
1743                                         $event = DBA::selectFirst('event', ['edited', 'start', 'finish', 'summary', 'desc', 'location', 'nofinish', 'adjust'], ['id' => $item['event-id']]);
1744                                         if (!empty($event)) {
1745                                                 // We aren't using "Event::store" here, since we don't want to trigger any further action
1746                                                 $ret = DBA::update('event', $event, ['id' => $event_post['event-id']]);
1747                                                 Logger::info('Event updated', ['uid' => $uid, 'source-event' => $item['event-id'], 'target-event' => $event_post['event-id'], 'ret' => $ret]);
1748                                         }
1749                                 }
1750                         }
1751                         Logger::info('Item already exists', ['uri-id' => $item['uri-id'], 'uid' => $uid, 'id' => $post['id']]);
1752                         return $post['id'];
1753                 }
1754
1755                 // Data from the "post-user" table
1756                 unset($item['id']);
1757                 unset($item['mention']);
1758                 unset($item['starred']);
1759                 unset($item['unseen']);
1760                 unset($item['psid']);
1761                 unset($item['pinned']);
1762                 unset($item['ignored']);
1763                 unset($item['pubmail']);
1764                 unset($item['event-id']);
1765                 unset($item['hidden']);
1766                 unset($item['notification-type']);
1767
1768                 // Data from the "post-delivery-data" table
1769                 unset($item['postopts']);
1770                 unset($item['inform']);
1771
1772                 $item['uid'] = $uid;
1773                 $item['origin'] = 0;
1774                 $item['wall'] = 0;
1775
1776                 $item['contact-id'] = self::contactId($item);
1777
1778                 $notify = false;
1779                 if ($item['gravity'] == self::GRAVITY_PARENT) {
1780                         $contact = DBA::selectFirst('contact', [], ['id' => $item['contact-id'], 'self' => false]);
1781                         if (DBA::isResult($contact)) {
1782                                 $notify = self::isRemoteSelf($contact, $item);
1783                         }
1784                 }
1785
1786                 $distributed = self::insert($item, $notify);
1787
1788                 if (!$distributed) {
1789                         Logger::info("Distributed item wasn't stored", ['uri-id' => $item['uri-id'], 'user' => $uid]);
1790                 } else {
1791                         Logger::info('Distributed item was stored', ['uri-id' => $item['uri-id'], 'user' => $uid, 'stored' => $distributed]);
1792                 }
1793                 return $distributed;
1794         }
1795
1796         /**
1797          * Add a shadow entry for a given item id that is a thread starter
1798          *
1799          * We store every public item entry additionally with the user id "0".
1800          * This is used for the community page and for the search.
1801          * It is planned that in the future we will store public item entries only once.
1802          *
1803          * @param integer $itemid Item ID that should be added
1804          * @throws \Exception
1805          */
1806         private static function addShadow(int $itemid)
1807         {
1808                 $fields = ['uid', 'private', 'visible', 'deleted', 'network', 'uri-id'];
1809                 $condition = ['id' => $itemid, 'gravity' => self::GRAVITY_PARENT];
1810                 $item = Post::selectFirst($fields, $condition);
1811
1812                 if (!DBA::isResult($item)) {
1813                         return;
1814                 }
1815
1816                 // is it already a copy?
1817                 if (($itemid == 0) || ($item['uid'] == 0)) {
1818                         return;
1819                 }
1820
1821                 // Is it a visible public post?
1822                 if (!$item["visible"] || $item["deleted"]  || ($item["private"] == self::PRIVATE)) {
1823                         return;
1824                 }
1825
1826                 // is it an entry from a connector? Only add an entry for natively connected networks
1827                 if (!in_array($item["network"], array_merge(Protocol::FEDERATED ,['']))) {
1828                         return;
1829                 }
1830
1831                 if (Post::exists(['uri-id' => $item['uri-id'], 'uid' => 0])) {
1832                         return;
1833                 }
1834
1835                 $item = Post::selectFirst(array_merge(self::ITEM_FIELDLIST, ['protocol']), ['id' => $itemid]);
1836
1837                 if (DBA::isResult($item)) {
1838                         // Preparing public shadow (removing user specific data)
1839                         $item['uid'] = 0;
1840                         unset($item['id']);
1841                         unset($item['parent']);
1842                         unset($item['wall']);
1843                         unset($item['mention']);
1844                         unset($item['origin']);
1845                         unset($item['starred']);
1846                         unset($item['postopts']);
1847                         unset($item['inform']);
1848                         unset($item['post-reason']);
1849                         if ($item['uri-id'] == $item['parent-uri-id']) {
1850                                 $item['contact-id'] = $item['owner-id'];
1851                         } else {
1852                                 $item['contact-id'] = $item['author-id'];
1853                         }
1854
1855                         $public_shadow = self::insert($item);
1856
1857                         Logger::info('Stored public shadow', ['thread' => $itemid, 'id' => $public_shadow]);
1858                 }
1859         }
1860
1861         /**
1862          * Add a shadow entry for a given item id that is a comment
1863          *
1864          * This function does the same like the function above - but for comments
1865          *
1866          * @param integer $itemid Item ID that should be added
1867          * @throws \Exception
1868          */
1869         private static function addShadowPost(int $itemid)
1870         {
1871                 $item = Post::selectFirst(array_merge(self::ITEM_FIELDLIST, ['protocol']), ['id' => $itemid]);
1872                 if (!DBA::isResult($item)) {
1873                         return;
1874                 }
1875
1876                 // Is it a toplevel post?
1877                 if ($item['gravity'] == self::GRAVITY_PARENT) {
1878                         self::addShadow($itemid);
1879                         return;
1880                 }
1881
1882                 // Is this a shadow entry?
1883                 if ($item['uid'] == 0) {
1884                         return;
1885                 }
1886
1887                 // Is there a shadow parent?
1888                 if (!Post::exists(['uri-id' => $item['parent-uri-id'], 'uid' => 0])) {
1889                         return;
1890                 }
1891
1892                 // Is there already a shadow entry?
1893                 if (Post::exists(['uri-id' => $item['uri-id'], 'uid' => 0])) {
1894                         return;
1895                 }
1896
1897                 // Save "origin" and "parent" state
1898                 $origin = $item['origin'];
1899                 $parent = $item['parent'];
1900
1901                 // Preparing public shadow (removing user specific data)
1902                 $item['uid'] = 0;
1903                 unset($item['id']);
1904                 unset($item['parent']);
1905                 unset($item['wall']);
1906                 unset($item['mention']);
1907                 unset($item['origin']);
1908                 unset($item['starred']);
1909                 unset($item['postopts']);
1910                 unset($item['inform']);
1911                 unset($item['post-reason']);
1912                 $item['contact-id'] = Contact::getIdForURL($item['author-link']);
1913
1914                 $public_shadow = self::insert($item);
1915
1916                 Logger::info('Stored public shadow', ['uri-id' => $item['uri-id'], 'id' => $public_shadow]);
1917
1918                 // If this was a comment to a Diaspora post we don't get our comment back.
1919                 // This means that we have to distribute the comment by ourselves.
1920                 if ($origin && Post::exists(['id' => $parent, 'network' => Protocol::DIASPORA])) {
1921                         self::distribute($public_shadow);
1922                 }
1923         }
1924
1925         /**
1926          * Adds a language specification in a "language" element of given $arr.
1927          * Expects "body" element to exist in $arr.
1928          *
1929          * @param array $item
1930          * @return string detected language
1931          * @throws \Text_LanguageDetect_Exception
1932          */
1933         private static function getLanguage(array $item): string
1934         {
1935                 if (!empty($item['language'])) {
1936                         return $item['language'];
1937                 }
1938
1939                 if (!in_array($item['gravity'], [self::GRAVITY_PARENT, self::GRAVITY_COMMENT]) || empty($item['body'])) {
1940                         return '';
1941                 }
1942
1943                 $languages = self::getLanguageArray(trim($item['title'] . "\n" . $item['body']), 3);
1944                 if (empty($languages)) {
1945                         return '';
1946                 }
1947
1948                 return json_encode($languages);
1949         }
1950
1951         /**
1952          * Get a language array from a given text
1953          *
1954          * @param string  $body
1955          * @param integer $count
1956          * @return array
1957          */
1958         public static function getLanguageArray(string $body, int $count): array
1959         {
1960                 // Convert attachments to links
1961                 $naked_body = BBCode::removeAttachment($body);
1962                 if (empty($naked_body)) {
1963                         return [];
1964                 }
1965
1966                 // Remove links and pictures
1967                 $naked_body = BBCode::removeLinks($naked_body);
1968
1969                 // Convert the title and the body to plain text
1970                 $naked_body = BBCode::toPlaintext($naked_body);
1971
1972                 // Remove possibly remaining links
1973                 $naked_body = preg_replace(Strings::autoLinkRegEx(), '', $naked_body);
1974
1975                 if (empty($naked_body)) {
1976                         return [];
1977                 }
1978
1979                 $naked_body = self::getDominantLanguage($naked_body);
1980
1981                 $availableLanguages = DI::l10n()->getAvailableLanguages();
1982                 // See https://github.com/friendica/friendica/issues/10511
1983                 // Persian is manually added to language detection until a persian translation is provided for the interface, at
1984                 // which point it will be automatically available through `getAvailableLanguages()` and this should be removed.
1985                 $availableLanguages['fa'] = 'fa';
1986
1987                 $ld = new Language(array_keys($availableLanguages));
1988                 return $ld->detect($naked_body)->limit(0, $count)->close() ?: [];
1989         }
1990
1991         /**
1992          * Check if latin or non latin are dominant in the body and only return the dominant one
1993          *
1994          * @param string $body
1995          * @return string
1996          */
1997         private static function getDominantLanguage(string $body): string
1998         {
1999                 $latin = '';
2000                 $non_latin = '';
2001                 for ($i = 0; $i < mb_strlen($body); $i++) {
2002                         $character = mb_substr($body, $i, 1);
2003                         $ord = mb_ord($character);
2004
2005                         // We add the most common characters to both strings.
2006                         if (($ord <= 64) || ($ord >= 91 && $ord <= 96) || ($ord >= 123 && $ord <= 191) || in_array($ord, [215, 247]) || ($ord >= 697 && $ord <= 735) || ($ord > 65535)) {
2007                                 $latin .= $character;
2008                                 $non_latin .= $character;
2009                         } elseif ($ord < 768) {
2010                                 $latin .= $character;
2011                         } else {
2012                                 $non_latin .= $character;
2013                         }
2014                 }
2015                 return (mb_strlen($latin) > mb_strlen($non_latin)) ? $latin : $non_latin;
2016         }
2017
2018         public static function getLanguageMessage(array $item): string
2019         {
2020                 $iso639 = new \Matriphe\ISO639\ISO639;
2021
2022                 $used_languages = '';
2023                 foreach (json_decode($item['language'], true) as $language => $reliability) {
2024                         $used_languages .= $iso639->languageByCode1($language) . ' (' . $language . "): " . number_format($reliability, 5) . '\n';
2025                 }
2026                 $used_languages = DI::l10n()->t('Detected languages in this post:\n%s', $used_languages);
2027                 return $used_languages;
2028         }
2029
2030         /**
2031          * Creates an unique guid out of a given uri.
2032          * This function is used for messages outside the fediverse (Connector posts, feeds, Mails, ...)
2033          * Posts that are created on this system are using System::createUUID.
2034          * Received ActivityPub posts are using Processor::getGUIDByURL.
2035          *
2036          * @param string      $uri uri of an item entry
2037          * @param string|null $host hostname for the GUID prefix
2038          * @return string Unique guid
2039          */
2040         public static function guidFromUri(string $uri, string $host = null): string
2041         {
2042                 // Our regular guid routine is using this kind of prefix as well
2043                 // We have to avoid that different routines could accidentally create the same value
2044                 $parsed = parse_url($uri);
2045
2046                 // Remove the scheme to make sure that "https" and "http" doesn't make a difference
2047                 unset($parsed['scheme']);
2048
2049                 // Glue it together to be able to make a hash from it
2050                 $host_id = implode('/', $parsed);
2051
2052                 // Use a mixture of several hashes to provide some GUID like experience
2053                 return hash('crc32', $host) . '-'. hash('joaat', $host_id) . '-'. hash('fnv164', $host_id);
2054         }
2055
2056         /**
2057          * generate an unique URI
2058          *
2059          * @param string $guid An existing GUID (Otherwise it will be generated)
2060          *
2061          * @return string
2062          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
2063          */
2064         public static function newURI(string $guid = ''): string
2065         {
2066                 if ($guid == '') {
2067                         $guid = System::createUUID();
2068                 }
2069
2070                 return DI::baseUrl()->get() . '/objects/' . $guid;
2071         }
2072
2073         /**
2074          * Set "success_update" and "last-item" to the date of the last time we heard from this contact
2075          *
2076          * This can be used to filter for inactive contacts.
2077          * Only do this for public postings to avoid privacy problems, since poco data is public.
2078          * Don't set this value if it isn't from the owner (could be an author that we don't know)
2079          *
2080          * @param array $arr Contains the just posted item record
2081          * @throws \Exception
2082          */
2083         private static function updateContact(array $arr)
2084         {
2085                 // Unarchive the author
2086                 $contact = DBA::selectFirst('contact', [], ['id' => $arr["author-id"]]);
2087                 if (DBA::isResult($contact)) {
2088                         Contact::unmarkForArchival($contact);
2089                 }
2090
2091                 // Unarchive the contact if it's not our own contact
2092                 $contact = DBA::selectFirst('contact', [], ['id' => $arr["contact-id"], 'self' => false]);
2093                 if (DBA::isResult($contact)) {
2094                         Contact::unmarkForArchival($contact);
2095                 }
2096
2097                 /// @todo On private posts we could obfuscate the date
2098                 $update = ($arr['private'] != self::PRIVATE) || in_array($arr['network'], Protocol::FEDERATED);
2099
2100                 // Is it a forum? Then we don't care about the rules from above
2101                 if (!$update && in_array($arr["network"], [Protocol::ACTIVITYPUB, Protocol::DFRN]) && ($arr["parent-uri-id"] === $arr["uri-id"])) {
2102                         if (DBA::exists('contact', ['id' => $arr['contact-id'], 'forum' => true])) {
2103                                 $update = true;
2104                         }
2105                 }
2106
2107                 if ($update) {
2108                         // The "self" contact id is used (for example in the connectors) when the contact is unknown
2109                         // So we have to ensure to only update the last item when it had been our own post,
2110                         // or it had been done by a "regular" contact.
2111                         if (!empty($arr['wall'])) {
2112                                 $condition = ['id' => $arr['contact-id']];
2113                         } else {
2114                                 $condition = ['id' => $arr['contact-id'], 'self' => false];
2115                         }
2116                         Contact::update(['failed' => false, 'local-data' => true, 'success_update' => $arr['received'], 'last-item' => $arr['received']], $condition);
2117                 }
2118                 // Now do the same for the system wide contacts with uid=0
2119                 if ($arr['private'] != self::PRIVATE) {
2120                         Contact::update(['failed' => false, 'local-data' => true, 'success_update' => $arr['received'], 'last-item' => $arr['received']],
2121                                 ['id' => $arr['owner-id']]);
2122
2123                         if ($arr['owner-id'] != $arr['author-id']) {
2124                                 Contact::update(['failed' => false, 'local-data' => true, 'success_update' => $arr['received'], 'last-item' => $arr['received']],
2125                                         ['id' => $arr['author-id']]);
2126                         }
2127                 }
2128         }
2129
2130         public static function setHashtags(string $body): string
2131         {
2132                 $body = BBCode::performWithEscapedTags($body, ['noparse', 'pre', 'code', 'img'], function ($body) {
2133                         $tags = BBCode::getTags($body);
2134
2135                         // No hashtags?
2136                         if (!count($tags)) {
2137                                 return $body;
2138                         }
2139
2140                         // This sorting is important when there are hashtags that are part of other hashtags
2141                         // Otherwise there could be problems with hashtags like #test and #test2
2142                         // Because of this we are sorting from the longest to the shortest tag.
2143                         usort($tags, function ($a, $b) {
2144                                 return strlen($b) <=> strlen($a);
2145                         });
2146
2147                         $URLSearchString = "^\[\]";
2148
2149                         // All hashtags should point to the home server if "local_tags" is activated
2150                         if (DI::config()->get('system', 'local_tags')) {
2151                                 $body = preg_replace("/#\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",
2152                                         "#[url=" . DI::baseUrl() . "/search?tag=$2]$2[/url]", $body);
2153                         }
2154
2155                         // mask hashtags inside of url, bookmarks and attachments to avoid urls in urls
2156                         $body = preg_replace_callback("/\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",
2157                                 function ($match) {
2158                                         return ("[url=" . str_replace("#", "&num;", $match[1]) . "]" . str_replace("#", "&num;", $match[2]) . "[/url]");
2159                                 }, $body);
2160
2161                         $body = preg_replace_callback("/\[bookmark\=([$URLSearchString]*)\](.*?)\[\/bookmark\]/ism",
2162                                 function ($match) {
2163                                         return ("[bookmark=" . str_replace("#", "&num;", $match[1]) . "]" . str_replace("#", "&num;", $match[2]) . "[/bookmark]");
2164                                 }, $body);
2165
2166                         $body = preg_replace_callback("/\[attachment (.*?)\](.*?)\[\/attachment\]/ism",
2167                                 function ($match) {
2168                                         return ("[attachment " . str_replace("#", "&num;", $match[1]) . "]" . $match[2] . "[/attachment]");
2169                                 }, $body);
2170
2171                         // Repair recursive urls
2172                         $body = preg_replace("/&num;\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",
2173                                 "&num;$2", $body);
2174
2175                         foreach ($tags as $tag) {
2176                                 if ((strpos($tag, '#') !== 0) || strpos($tag, '[url=') || strlen($tag) < 2 || $tag[1] == '#') {
2177                                         continue;
2178                                 }
2179
2180                                 $basetag = str_replace('_', ' ', substr($tag, 1));
2181                                 $newtag = '#[url=' . DI::baseUrl() . '/search?tag=' . $basetag . ']' . $basetag . '[/url]';
2182
2183                                 $body = str_replace($tag, $newtag, $body);
2184                         }
2185
2186                         // Convert back the masked hashtags
2187                         $body = str_replace("&num;", "#", $body);
2188
2189                         return $body;
2190                 });
2191
2192                 return $body;
2193         }
2194
2195         /**
2196          * look for mention tags and setup a second delivery chain for forum/community posts if appropriate
2197          *
2198          * @param int $uid
2199          * @param int $item_id
2200          * @return boolean true if item was deleted, else false
2201          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
2202          * @throws \ImagickException
2203          */
2204         private static function tagDeliver(int $uid, int $item_id): bool
2205         {
2206                 $mention = false;
2207
2208                 $owner = User::getOwnerDataById($uid);
2209                 if (!DBA::isResult($owner)) {
2210                         Logger::warning('User not found, quitting here.', ['uid' => $uid]);
2211                         return false;
2212                 }
2213
2214                 if ($owner['contact-type'] != User::ACCOUNT_TYPE_COMMUNITY) {
2215                         Logger::debug('Owner is no community, quitting here.', ['uid' => $uid, 'id' => $item_id]);
2216                         return false;
2217                 }
2218
2219                 $item = Post::selectFirst(self::ITEM_FIELDLIST, ['id' => $item_id, 'gravity' => [self::GRAVITY_PARENT, self::GRAVITY_COMMENT], 'origin' => false]);
2220                 if (!DBA::isResult($item)) {
2221                         Logger::debug('Post is an activity or origin or not found at all, quitting here.', ['id' => $item_id]);
2222                         return false;
2223                 }
2224
2225                 if ($item['gravity'] == self::GRAVITY_PARENT) {
2226                         if (Tag::isMentioned($item['uri-id'], $owner['url'])) {
2227                                 Logger::info('Mention found in tag.', ['uri' => $item['uri'], 'uid' => $uid, 'id' => $item_id, 'uri-id' => $item['uri-id'], 'guid' => $item['guid']]);
2228                         } else {
2229                                 Logger::info('Top-level post without mention is deleted.', ['uri' => $item['uri'], $uid, 'id' => $item_id, 'uri-id' => $item['uri-id'], 'guid' => $item['guid']]);
2230                                 Post\User::delete(['uri-id' => $item['uri-id'], 'uid' => $item['uid']]);
2231                                 return true;
2232                         }
2233
2234                         $arr = ['item' => $item, 'user' => $owner];
2235
2236                         Hook::callAll('tagged', $arr);
2237                 } else {
2238                         if (Tag::isMentioned($item['parent-uri-id'], $owner['url'])) {
2239                                 Logger::info('Mention found in parent tag.', ['uri' => $item['uri'], 'uid' => $uid, 'id' => $item_id, 'uri-id' => $item['uri-id'], 'guid' => $item['guid']]);
2240                         } else {
2241                                 Logger::debug('No mentions found in parent, quitting here.', ['id' => $item_id, 'uri-id' => $item['uri-id'], 'guid' => $item['guid']]);
2242                                 return false;
2243                         }
2244                 }
2245
2246                 Logger::info('Community post will be distributed', ['uri' => $item['uri'], 'uid' => $uid, 'id' => $item_id, 'uri-id' => $item['uri-id'], 'guid' => $item['guid']]);
2247
2248                 if ($owner['page-flags'] == User::PAGE_FLAGS_PRVGROUP) {
2249                         $allow_cid = '';
2250                         $allow_gid = '<' . Group::FOLLOWERS . '>';
2251                         $deny_cid  = '';
2252                         $deny_gid  = '';
2253                         self::performActivity($item['id'], 'announce', $uid, $allow_cid, $allow_gid, $deny_cid, $deny_gid);
2254                 } else {
2255                         self::performActivity($item['id'], 'announce', $uid);
2256                 }
2257
2258                 Logger::info('Community post had been distributed', ['uri' => $item['uri'], 'uid' => $uid, 'id' => $item_id, 'uri-id' => $item['uri-id'], 'guid' => $item['guid']]);
2259                 return false;
2260         }
2261
2262         /**
2263          * Automatically reshare the item if the "remote_self" option is selected
2264          *
2265          * @param array $item
2266          * @return void
2267          */
2268         private static function autoReshare(array $item)
2269         {
2270                 if ($item['gravity'] != self::GRAVITY_PARENT) {
2271                         return;
2272                 }
2273
2274                 if (!DBA::exists('contact', ['id' => $item['contact-id'], 'remote_self' => Contact::MIRROR_NATIVE_RESHARE])) {
2275                         return;
2276                 }
2277
2278                 if (!in_array($item['network'], [Protocol::ACTIVITYPUB, Protocol::DFRN])) {
2279                         return;
2280                 }
2281
2282                 Logger::info('Automatically reshare item', ['uid' => $item['uid'], 'id' => $item['id'], 'guid' => $item['guid'], 'uri-id' => $item['uri-id']]);
2283
2284                 self::performActivity($item['id'], 'announce', $item['uid']);
2285         }
2286
2287         public static function isRemoteSelf(array $contact, array &$datarray): bool
2288         {
2289                 if (!$contact['remote_self']) {
2290                         return false;
2291                 }
2292
2293                 // Prevent the forwarding of posts that are forwarded
2294                 if (!empty($datarray["extid"]) && ($datarray["extid"] == Protocol::DFRN)) {
2295                         Logger::info('Already forwarded');
2296                         return false;
2297                 }
2298
2299                 // Prevent to forward already forwarded posts
2300                 if ($datarray["app"] == DI::baseUrl()->getHostname()) {
2301                         Logger::info('Already forwarded (second test)');
2302                         return false;
2303                 }
2304
2305                 // Only forward posts
2306                 if ($datarray["verb"] != Activity::POST) {
2307                         Logger::info('No post');
2308                         return false;
2309                 }
2310
2311                 if (($contact['network'] != Protocol::FEED) && ($datarray['private'] == self::PRIVATE)) {
2312                         Logger::info('Not public');
2313                         return false;
2314                 }
2315
2316                 $datarray2 = $datarray;
2317                 Logger::info('remote-self start', ['contact' => $contact['url'], 'remote_self'=> $contact['remote_self'], 'item' => $datarray]);
2318                 if ($contact['remote_self'] == Contact::MIRROR_OWN_POST) {
2319                         $self = DBA::selectFirst('contact', ['id', 'name', 'url', 'thumb'],
2320                                         ['uid' => $contact['uid'], 'self' => true]);
2321                         if (DBA::isResult($self)) {
2322                                 $datarray['contact-id'] = $self["id"];
2323
2324                                 $datarray['owner-name'] = $self["name"];
2325                                 $datarray['owner-link'] = $self["url"];
2326                                 $datarray['owner-avatar'] = $self["thumb"];
2327
2328                                 $datarray['author-name']   = $datarray['owner-name'];
2329                                 $datarray['author-link']   = $datarray['owner-link'];
2330                                 $datarray['author-avatar'] = $datarray['owner-avatar'];
2331
2332                                 unset($datarray['edited']);
2333
2334                                 unset($datarray['network']);
2335                                 unset($datarray['owner-id']);
2336                                 unset($datarray['author-id']);
2337                         }
2338
2339                         if ($contact['network'] != Protocol::FEED) {
2340                                 $old_uri_id = $datarray["uri-id"] ?? 0;
2341                                 $datarray["guid"] = System::createUUID();
2342                                 unset($datarray["plink"]);
2343                                 $datarray["uri"] = self::newURI($datarray["guid"]);
2344                                 $datarray["uri-id"] = ItemURI::getIdByURI($datarray["uri"]);
2345                                 $datarray["extid"] = Protocol::DFRN;
2346                                 $urlpart = parse_url($datarray2['author-link']);
2347                                 $datarray["app"] = $urlpart["host"];
2348                                 if (!empty($old_uri_id)) {
2349                                         Post\Media::copy($old_uri_id, $datarray["uri-id"]);
2350                                 }
2351
2352                                 unset($datarray["parent-uri"]);
2353                                 unset($datarray["thr-parent"]);
2354                         } else {
2355                                 $datarray['private'] = self::PUBLIC;
2356                         }
2357                 }
2358
2359                 if ($contact['network'] != Protocol::FEED) {
2360                         // Store the original post
2361                         $result = self::insert($datarray2);
2362                         Logger::info('remote-self post original item', ['contact' => $contact['url'], 'result'=> $result, 'item' => $datarray2]);
2363                 } else {
2364                         Logger::info('No valid mirroring option', ['uid' => $contact['uid'], 'id' => $contact['id'], 'network' => $contact['network'], 'remote_self' => $contact['remote_self']]);
2365                         return false;
2366                 }
2367
2368                 return (bool)$result;
2369         }
2370
2371         /**
2372          *
2373          * @param string $s
2374          * @param int    $uid
2375          * @param array  $item
2376          * @param int    $cid
2377          * @return string
2378          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
2379          * @throws \ImagickException
2380          */
2381         public static function fixPrivatePhotos(string $s, int $uid, array $item = null, int $cid = 0): string
2382         {
2383                 if (DI::config()->get('system', 'disable_embedded')) {
2384                         return $s;
2385                 }
2386
2387                 Logger::info('check for photos');
2388                 $site = substr(DI::baseUrl(), strpos(DI::baseUrl(), '://'));
2389
2390                 $orig_body = $s;
2391                 $new_body = '';
2392
2393                 $img_start = strpos($orig_body, '[img');
2394                 $img_st_close = ($img_start !== false ? strpos(substr($orig_body, $img_start), ']') : false);
2395                 $img_len = ($img_start !== false ? strpos(substr($orig_body, $img_start + $img_st_close + 1), '[/img]') : false);
2396
2397                 while (($img_st_close !== false) && ($img_len !== false)) {
2398                         $img_st_close++; // make it point to AFTER the closing bracket
2399                         $image = substr($orig_body, $img_start + $img_st_close, $img_len);
2400
2401                         Logger::info('found photo', ['image' => $image]);
2402
2403                         if (stristr($image, $site . '/photo/')) {
2404                                 // Only embed locally hosted photos
2405                                 $replace = false;
2406                                 $i = basename($image);
2407                                 $i = str_replace(['.jpg', '.png', '.gif'], ['', '', ''], $i);
2408                                 $x = strpos($i, '-');
2409
2410                                 if ($x) {
2411                                         $res = substr($i, $x + 1);
2412                                         $i = substr($i, 0, $x);
2413                                         $photo = Photo::getPhotoForUser($uid, $i, $res);
2414                                         if (DBA::isResult($photo)) {
2415                                                 /*
2416                                                  * Check to see if we should replace this photo link with an embedded image
2417                                                  * 1. No need to do so if the photo is public
2418                                                  * 2. If there's a contact-id provided, see if they're in the access list
2419                                                  *    for the photo. If so, embed it.
2420                                                  * 3. Otherwise, if we have an item, see if the item permissions match the photo
2421                                                  *    permissions, regardless of order but first check to see if they're an exact
2422                                                  *    match to save some processing overhead.
2423                                                  */
2424                                                 if (self::hasPermissions($photo)) {
2425                                                         if ($cid) {
2426                                                                 $recips = self::enumeratePermissions($photo);
2427                                                                 if (in_array($cid, $recips)) {
2428                                                                         $replace = true;
2429                                                                 }
2430                                                         } elseif ($item) {
2431                                                                 if (self::samePermissions($uid, $item, $photo)) {
2432                                                                         $replace = true;
2433                                                                 }
2434                                                         }
2435                                                 }
2436                                                 if ($replace) {
2437                                                         $photo_img = Photo::getImageForPhoto($photo);
2438                                                         // If a custom width and height were specified, apply before embedding
2439                                                         if (preg_match("/\[img\=([0-9]*)x([0-9]*)\]/is", substr($orig_body, $img_start, $img_st_close), $match)) {
2440                                                                 Logger::info('scaling photo');
2441
2442                                                                 $width = intval($match[1]);
2443                                                                 $height = intval($match[2]);
2444
2445                                                                 $photo_img->scaleDown(max($width, $height));
2446                                                         }
2447
2448                                                         $data = $photo_img->asString();
2449                                                         $type = $photo_img->getType();
2450
2451                                                         Logger::info('replacing photo');
2452                                                         $image = 'data:' . $type . ';base64,' . base64_encode($data);
2453                                                         Logger::debug('replaced', ['image' => $image]);
2454                                                 }
2455                                         }
2456                                 }
2457                         }
2458
2459                         $new_body = $new_body . substr($orig_body, 0, $img_start + $img_st_close) . $image . '[/img]';
2460                         $orig_body = substr($orig_body, $img_start + $img_st_close + $img_len + strlen('[/img]'));
2461                         if ($orig_body === false) {
2462                                 $orig_body = '';
2463                         }
2464
2465                         $img_start = strpos($orig_body, '[img');
2466                         $img_st_close = ($img_start !== false ? strpos(substr($orig_body, $img_start), ']') : false);
2467                         $img_len = ($img_start !== false ? strpos(substr($orig_body, $img_start + $img_st_close + 1), '[/img]') : false);
2468                 }
2469
2470                 $new_body = $new_body . $orig_body;
2471
2472                 return $new_body;
2473         }
2474
2475         private static function hasPermissions(array $obj)
2476         {
2477                 return !empty($obj['allow_cid']) || !empty($obj['allow_gid']) ||
2478                         !empty($obj['deny_cid']) || !empty($obj['deny_gid']);
2479         }
2480
2481         // @TODO $uid is unused parameter
2482         private static function samePermissions($uid, array $obj1, array $obj2): bool
2483         {
2484                 // first part is easy. Check that these are exactly the same.
2485                 if (($obj1['allow_cid'] == $obj2['allow_cid'])
2486                         && ($obj1['allow_gid'] == $obj2['allow_gid'])
2487                         && ($obj1['deny_cid'] == $obj2['deny_cid'])
2488                         && ($obj1['deny_gid'] == $obj2['deny_gid'])) {
2489                         return true;
2490                 }
2491
2492                 // This is harder. Parse all the permissions and compare the resulting set.
2493                 $recipients1 = self::enumeratePermissions($obj1);
2494                 $recipients2 = self::enumeratePermissions($obj2);
2495                 sort($recipients1);
2496                 sort($recipients2);
2497
2498                 /// @TODO Comparison of arrays, maybe use array_diff_assoc() here?
2499                 return ($recipients1 == $recipients2);
2500         }
2501
2502         /**
2503          * Returns an array of contact-ids that are allowed to see this object
2504          *
2505          * @param array $obj        Item array with at least uid, allow_cid, allow_gid, deny_cid and deny_gid
2506          * @param bool  $check_dead Prunes unavailable contacts from the result
2507          * @return array
2508          * @throws \Exception
2509          */
2510         public static function enumeratePermissions(array $obj, bool $check_dead = false): array
2511         {
2512                 $aclFormater = DI::aclFormatter();
2513
2514                 $allow_people = $aclFormater->expand($obj['allow_cid']);
2515                 $allow_groups = Group::expand($obj['uid'], $aclFormater->expand($obj['allow_gid']), $check_dead);
2516                 $deny_people  = $aclFormater->expand($obj['deny_cid']);
2517                 $deny_groups  = Group::expand($obj['uid'], $aclFormater->expand($obj['deny_gid']), $check_dead);
2518                 $recipients   = array_unique(array_merge($allow_people, $allow_groups));
2519                 $deny         = array_unique(array_merge($deny_people, $deny_groups));
2520                 $recipients   = array_diff($recipients, $deny);
2521                 return $recipients;
2522         }
2523
2524         public static function expire(int $uid, int $days, string $network = "", bool $force = false)
2525         {
2526                 if (!$uid || ($days < 1)) {
2527                         return;
2528                 }
2529
2530                 $condition = ["`uid` = ? AND NOT `deleted` AND `gravity` = ?",
2531                         $uid, self::GRAVITY_PARENT];
2532
2533                 /*
2534                  * $expire_network_only = save your own wall posts
2535                  * and just expire conversations started by others
2536                  */
2537                 $expire_network_only = DI::pConfig()->get($uid, 'expire', 'network_only', false);
2538
2539                 if ($expire_network_only) {
2540                         $condition[0] .= " AND NOT `wall`";
2541                 }
2542
2543                 if ($network != "") {
2544                         $condition[0] .= " AND `network` = ?";
2545                         $condition[] = $network;
2546                 }
2547
2548                 $condition[0] .= " AND `received` < ?";
2549                 $condition[] = DateTimeFormat::utc('now - ' . $days . ' day');
2550
2551                 $items = Post::select(['resource-id', 'starred', 'id', 'post-type', 'uid', 'uri-id'], $condition);
2552
2553                 if (!DBA::isResult($items)) {
2554                         return;
2555                 }
2556
2557                 $expire_items = (bool)DI::pConfig()->get($uid, 'expire', 'items', true);
2558
2559                 // Forcing expiring of items - but not notes and marked items
2560                 if ($force) {
2561                         $expire_items = true;
2562                 }
2563
2564                 $expire_notes = (bool)DI::pConfig()->get($uid, 'expire', 'notes', true);
2565                 $expire_starred = (bool)DI::pConfig()->get($uid, 'expire', 'starred', true);
2566                 $expire_photos = (bool)DI::pConfig()->get($uid, 'expire', 'photos', false);
2567
2568                 $expired = 0;
2569
2570                 $priority = DI::config()->get('system', 'expire-notify-priority');
2571
2572                 while ($item = Post::fetch($items)) {
2573                         // don't expire filed items
2574                         if (DBA::exists('post-category', ['uri-id' => $item['uri-id'], 'uid' => $item['uid'], 'type' => Post\Category::FILE])) {
2575                                 continue;
2576                         }
2577
2578                         // Only expire posts, not photos and photo comments
2579
2580                         if (!$expire_photos && !empty($item['resource-id'])) {
2581                                 continue;
2582                         } elseif (!$expire_starred && intval($item['starred'])) {
2583                                 continue;
2584                         } elseif (!$expire_notes && ($item['post-type'] == self::PT_PERSONAL_NOTE)) {
2585                                 continue;
2586                         } elseif (!$expire_items && ($item['post-type'] != self::PT_PERSONAL_NOTE)) {
2587                                 continue;
2588                         }
2589
2590                         self::markForDeletionById($item['id'], $priority);
2591
2592                         ++$expired;
2593                 }
2594                 DBA::close($items);
2595                 Logger::notice('Expired', ['user' => $uid, 'days' => $days, 'network' => $network, 'force' => $force, 'expired' => $expired, 'expire items' => $expire_items, 'expire notes' => $expire_notes, 'expire starred' => $expire_starred, 'expire photos' => $expire_photos, 'condition' => $condition]);
2596         }
2597
2598         public static function firstPostDate(int $uid, bool $wall = false)
2599         {
2600                 $user = User::getById($uid, ['register_date']);
2601                 if (empty($user)) {
2602                         return false;
2603                 }
2604
2605                 $condition = ["`uid` = ? AND `wall` = ? AND NOT `deleted` AND `visible` AND `received` >= ?",
2606                         $uid, $wall, $user['register_date']];
2607                 $params = ['order' => ['received' => false]];
2608                 $thread = Post::selectFirstThread(['received'], $condition, $params);
2609                 if (DBA::isResult($thread)) {
2610                         $postdate = substr(DateTimeFormat::local($thread['received']), 0, 10);
2611                         return $postdate;
2612                 }
2613                 return false;
2614         }
2615
2616         /**
2617          * add/remove activity to an item
2618          *
2619          * Toggle activities as like,dislike,attend of an item
2620          *
2621          * @param int    $item_id
2622          * @param string $verb
2623          *            Activity verb. One of
2624          *            like, unlike, dislike, undislike, attendyes, unattendyes,
2625          *            attendno, unattendno, attendmaybe, unattendmaybe,
2626          *            announce, unannouce
2627          * @param int    $uid
2628          * @param string $allow_cid
2629          * @param string $allow_gid
2630          * @param string $deny_cid
2631          * @param string $deny_gid
2632          * @return bool
2633          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
2634          * @throws \ImagickException
2635          * @hook  'post_local_end'
2636          *            array $arr
2637          *            'post_id' => ID of posted item
2638          */
2639         public static function performActivity(int $item_id, string $verb, int $uid, string $allow_cid = null, string $allow_gid = null, string $deny_cid = null, string $deny_gid = null): bool
2640         {
2641                 if (empty($uid)) {
2642                         return false;
2643                 }
2644
2645                 Logger::notice('Start create activity', ['verb' => $verb, 'item' => $item_id, 'user' => $uid]);
2646
2647                 $item = Post::selectFirst(self::ITEM_FIELDLIST, ['id' => $item_id]);
2648                 if (!DBA::isResult($item)) {
2649                         Logger::warning('Post had not been fetched', ['id' => $item_id]);
2650                         return false;
2651                 }
2652
2653                 $uri_id = $item['uri-id'];
2654
2655                 if (!in_array($item['uid'], [0, $uid])) {
2656                         return false;
2657                 }
2658
2659                 if (!Post::exists(['uri-id' => $item['parent-uri-id'], 'uid' => $uid])) {
2660                         $stored = self::storeForUserByUriId($item['parent-uri-id'], $uid, ['post-reason' => Item::PR_ACTIVITY]);
2661                         if (($item['parent-uri-id'] == $item['uri-id']) && !empty($stored)) {
2662                                 $item = Post::selectFirst(self::ITEM_FIELDLIST, ['id' => $stored]);
2663                                 if (!DBA::isResult($item)) {
2664                                         Logger::info('Could not fetch just created item - should not happen', ['stored' => $stored, 'uid' => $uid, 'uri-id' => $uri_id]);
2665                                         return false;
2666                                 }
2667                         }
2668                 }
2669
2670                 // Retrieves the local post owner
2671                 $owner = User::getOwnerDataById($uid);
2672                 if (empty($owner)) {
2673                         Logger::info('Empty owner for user', ['uid' => $uid]);
2674                         return false;
2675                 }
2676
2677                 // Retrieve the current logged in user's public contact
2678                 $author_id = Contact::getPublicIdByUserId($uid);
2679                 if (empty($author_id)) {
2680                         Logger::info('Empty public contact');
2681                         return false;
2682                 }
2683
2684                 $activity = null;
2685                 switch ($verb) {
2686                         case 'like':
2687                         case 'unlike':
2688                                 $activity = Activity::LIKE;
2689                                 break;
2690                         case 'dislike':
2691                         case 'undislike':
2692                                 $activity = Activity::DISLIKE;
2693                                 break;
2694                         case 'attendyes':
2695                         case 'unattendyes':
2696                                 $activity = Activity::ATTEND;
2697                                 break;
2698                         case 'attendno':
2699                         case 'unattendno':
2700                                 $activity = Activity::ATTENDNO;
2701                                 break;
2702                         case 'attendmaybe':
2703                         case 'unattendmaybe':
2704                                 $activity = Activity::ATTENDMAYBE;
2705                                 break;
2706                         case 'follow':
2707                         case 'unfollow':
2708                                 $activity = Activity::FOLLOW;
2709                                 break;
2710                         case 'announce':
2711                         case 'unannounce':
2712                                 $activity = Activity::ANNOUNCE;
2713                                 break;
2714                         default:
2715                                 Logger::warning('unknown verb', ['verb' => $verb, 'item' => $item_id]);
2716                                 return false;
2717                 }
2718
2719                 $mode = Strings::startsWith($verb, 'un') ? 'delete' : 'create';
2720
2721                 // Enable activity toggling instead of on/off
2722                 $event_verb_flag = $activity === Activity::ATTEND || $activity === Activity::ATTENDNO || $activity === Activity::ATTENDMAYBE;
2723
2724                 // Look for an existing verb row
2725                 // Event participation activities are mutually exclusive, only one of them can exist at all times.
2726                 if ($event_verb_flag) {
2727                         $verbs = [Activity::ATTEND, Activity::ATTENDNO, Activity::ATTENDMAYBE];
2728
2729                         // Translate to the index based activity index
2730                         $vids = [];
2731                         foreach ($verbs as $verb) {
2732                                 $vids[] = Verb::getID($verb);
2733                         }
2734                 } else {
2735                         $vids = Verb::getID($activity);
2736                 }
2737
2738                 $condition = ['vid' => $vids, 'deleted' => false, 'gravity' => self::GRAVITY_ACTIVITY,
2739                         'author-id' => $author_id, 'uid' => $uid, 'thr-parent-id' => $uri_id];
2740                 $like_item = Post::selectFirst(['id', 'guid', 'verb'], $condition);
2741
2742                 if (DBA::isResult($like_item)) {
2743                         /**
2744                          * Truth table for existing activities
2745                          *
2746                          * |          Inputs            ||      Outputs      |
2747                          * |----------------------------||-------------------|
2748                          * |  Mode  | Event | Same verb || Delete? | Return? |
2749                          * |--------|-------|-----------||---------|---------|
2750                          * | create |  Yes  |    Yes    ||   No    |   Yes   |
2751                          * | create |  Yes  |    No     ||   Yes   |   No    |
2752                          * | create |  No   |    Yes    ||   No    |   Yes   |
2753                          * | create |  No   |    No     ||        N/A†       |
2754                          * | delete |  Yes  |    Yes    ||   Yes   |   N/A‡  |
2755                          * | delete |  Yes  |    No     ||   No    |   N/A‡  |
2756                          * | delete |  No   |    Yes    ||   Yes   |   N/A‡  |
2757                          * | delete |  No   |    No     ||        N/A†       |
2758                          * |--------|-------|-----------||---------|---------|
2759                          * |   A    |   B   |     C     || A xor C | !B or C |
2760                          *
2761                          * † Can't happen: It's impossible to find an existing non-event activity without
2762                          *                 the same verb because we are only looking for this single verb.
2763                          *
2764                          * ‡ The "mode = delete" is returning early whether an existing activity was found or not.
2765                          */
2766                         if ($mode == 'create' xor $like_item['verb'] == $activity) {
2767                                 self::markForDeletionById($like_item['id']);
2768                         }
2769
2770                         if (!$event_verb_flag || $like_item['verb'] == $activity) {
2771                                 return true;
2772                         }
2773                 }
2774
2775                 // No need to go further if we aren't creating anything
2776                 if ($mode == 'delete') {
2777                         return true;
2778                 }
2779
2780                 $objtype = $item['resource-id'] ? Activity\ObjectType::IMAGE : Activity\ObjectType::NOTE;
2781
2782                 $new_item = [
2783                         'guid'          => System::createUUID(),
2784                         'uri'           => self::newURI(),
2785                         'uid'           => $uid,
2786                         'contact-id'    => $owner['id'],
2787                         'wall'          => $item['wall'],
2788                         'origin'        => 1,
2789                         'network'       => Protocol::DFRN,
2790                         'protocol'      => Conversation::PARCEL_DIRECT,
2791                         'direction'     => Conversation::PUSH,
2792                         'gravity'       => self::GRAVITY_ACTIVITY,
2793                         'parent'        => $item['id'],
2794                         'thr-parent'    => $item['uri'],
2795                         'owner-id'      => $author_id,
2796                         'author-id'     => $author_id,
2797                         'body'          => $activity,
2798                         'verb'          => $activity,
2799                         'object-type'   => $objtype,
2800                         'allow_cid'     => $allow_cid ?? $item['allow_cid'],
2801                         'allow_gid'     => $allow_gid ?? $item['allow_gid'],
2802                         'deny_cid'      => $deny_cid ?? $item['deny_cid'],
2803                         'deny_gid'      => $deny_gid ?? $item['deny_gid'],
2804                         'visible'       => 1,
2805                         'unseen'        => 1,
2806                 ];
2807
2808                 if (in_array($activity, [Activity::LIKE, Activity::DISLIKE])) {
2809                         $signed = Diaspora::createLikeSignature($uid, $new_item);
2810                         if (!empty($signed)) {
2811                                 $new_item['diaspora_signed_text'] = json_encode($signed);
2812                         }
2813                 }
2814
2815                 self::insert($new_item, true);
2816
2817                 // If the parent item isn't visible then set it to visible
2818                 // @todo Check if this is still needed
2819                 if (!$item['visible']) {
2820                         self::update(['visible' => true], ['id' => $item['id']]);
2821                 }
2822                 return true;
2823         }
2824
2825         /**
2826          * Fetch the SQL condition for the given user id
2827          *
2828          * @param integer $owner_id User ID for which the permissions should be fetched
2829          * @return array condition
2830          */
2831         public static function getPermissionsConditionArrayByUserId(int $owner_id): array
2832         {
2833                 $local_user = DI::userSession()->getLocalUserId();
2834                 $remote_user = DI::userSession()->getRemoteContactID($owner_id);
2835
2836                 // default permissions - anonymous user
2837                 $condition = ["`private` != ?", self::PRIVATE];
2838
2839                 if ($local_user && ($local_user == $owner_id)) {
2840                         // Profile owner - everything is visible
2841                         $condition = [];
2842                 } elseif ($remote_user) {
2843                          // Authenticated visitor - fetch the matching permissionsets
2844                         $permissionSets = DI::permissionSet()->selectByContactId($remote_user, $owner_id);
2845                         if (!empty($set)) {
2846                                 $condition = ["(`private` != ? OR (`private` = ? AND `wall`
2847                                         AND `psid` IN (" . implode(', ', array_fill(0, count($set), '?')) . ")))",
2848                                         self::PRIVATE, self::PRIVATE];
2849                                 $condition = array_merge($condition, $permissionSets->column('id'));
2850                         }
2851                 }
2852
2853                 return $condition;
2854         }
2855
2856         /**
2857          * Get a permission SQL string for the given user
2858          *
2859          * @param int $owner_id
2860          * @param string $table
2861          * @return string
2862          */
2863         public static function getPermissionsSQLByUserId(int $owner_id, string $table = ''): string
2864         {
2865                 $local_user = DI::userSession()->getLocalUserId();
2866                 $remote_user = DI::userSession()->getRemoteContactID($owner_id);
2867
2868                 if (!empty($table)) {
2869                         $table = DBA::quoteIdentifier($table) . '.';
2870                 }
2871
2872                 /*
2873                  * Construct permissions
2874                  *
2875                  * default permissions - anonymous user
2876                  */
2877                 $sql = sprintf(" AND " . $table . "`private` != %d", self::PRIVATE);
2878
2879                 // Profile owner - everything is visible
2880                 if ($local_user && ($local_user == $owner_id)) {
2881                         $sql = '';
2882                 } elseif ($remote_user) {
2883                         /*
2884                          * Authenticated visitor. Unless pre-verified,
2885                          * check that the contact belongs to this $owner_id
2886                          * and load the groups the visitor belongs to.
2887                          * If pre-verified, the caller is expected to have already
2888                          * done this and passed the groups into this function.
2889                          */
2890                         $permissionSets = DI::permissionSet()->selectByContactId($remote_user, $owner_id);
2891
2892                         if (!empty($set)) {
2893                                 $sql_set = sprintf(" OR (" . $table . "`private` = %d AND " . $table . "`wall` AND " . $table . "`psid` IN (", self::PRIVATE) . implode(',', $permissionSets->column('id')) . "))";
2894                         } else {
2895                                 $sql_set = '';
2896                         }
2897
2898                         $sql = sprintf(" AND (" . $table . "`private` != %d", self::PRIVATE) . $sql_set . ")";
2899                 }
2900
2901                 return $sql;
2902         }
2903
2904         /**
2905          * get translated item type
2906          *
2907          * @param array                $item
2908          * @param \Friendica\Core\L10n $l10n
2909          * @return string
2910          */
2911         public static function postType(array $item, \Friendica\Core\L10n $l10n): string
2912         {
2913                 if (!empty($item['event-id'])) {
2914                         return $l10n->t('event');
2915                 } elseif (!empty($item['resource-id'])) {
2916                         return $l10n->t('photo');
2917                 } elseif ($item['gravity'] == self::GRAVITY_ACTIVITY) {
2918                         return $l10n->t('activity');
2919                 } elseif ($item['gravity'] == self::GRAVITY_COMMENT) {
2920                         return $l10n->t('comment');
2921                 }
2922
2923                 return $l10n->t('post');
2924         }
2925
2926         /**
2927          * Sets the "rendered-html" field of the provided item
2928          *
2929          * Body is preserved to avoid side-effects as we modify it just-in-time for spoilers and private image links
2930          *
2931          * @param array $item
2932          *
2933          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
2934          * @todo Remove reference, simply return "rendered-html" and "rendered-hash"
2935          */
2936         private static function putInCache(&$item)
2937         {
2938                 // Save original body to prevent addons to modify it
2939                 $body = $item['body'];
2940
2941                 $rendered_hash = $item['rendered-hash'] ?? '';
2942                 $rendered_html = $item['rendered-html'] ?? '';
2943
2944                 if ($rendered_hash == ''
2945                         || $rendered_html == ''
2946                         || $rendered_hash != hash('md5', BBCode::VERSION . '::' . $body)
2947                         || DI::config()->get('system', 'ignore_cache')
2948                 ) {
2949                         $item['rendered-html'] = BBCode::convertForUriId($item['uri-id'], $item['body']);
2950                         $item['rendered-hash'] = hash('md5', BBCode::VERSION . '::' . $body);
2951
2952                         $hook_data = ['item' => $item, 'rendered-html' => $item['rendered-html'], 'rendered-hash' => $item['rendered-hash']];
2953                         Hook::callAll('put_item_in_cache', $hook_data);
2954                         $item['rendered-html'] = $hook_data['rendered-html'];
2955                         $item['rendered-hash'] = $hook_data['rendered-hash'];
2956                         unset($hook_data);
2957
2958                         // Update if the generated values differ from the existing ones
2959                         if ((($rendered_hash != $item['rendered-hash']) || ($rendered_html != $item['rendered-html'])) && !empty($item['id'])) {
2960                                 self::update(
2961                                         [
2962                                                 'rendered-html' => $item['rendered-html'],
2963                                                 'rendered-hash' => $item['rendered-hash']
2964                                         ],
2965                                         ['id' => $item['id']]
2966                                 );
2967                         }
2968                 }
2969
2970                 $item['body'] = $body;
2971         }
2972
2973         /**
2974          * Given an item array, convert the body element from bbcode to html and add smilie icons.
2975          * If attach is true, also add icons for item attachments.
2976          *
2977          * @param array   $item Record from item table
2978          * @param boolean $attach If true, add icons for item attachments as well
2979          * @param boolean $is_preview Whether this is a preview
2980          * @param boolean $only_cache Whether only cached HTML should be updated
2981          * @return string item body html
2982          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
2983          * @throws \ImagickException
2984          * @hook  prepare_body_init item array before any work
2985          * @hook  prepare_body_content_filter ('item'=>item array, 'filter_reasons'=>string array) before first bbcode to html
2986          * @hook  prepare_body ('item'=>item array, 'html'=>body string, 'is_preview'=>boolean, 'filter_reasons'=>string array) after first bbcode to html
2987          * @hook  prepare_body_final ('item'=>item array, 'html'=>body string) after attach icons and blockquote special case handling (spoiler, author)
2988          */
2989         public static function prepareBody(array &$item, bool $attach = false, bool $is_preview = false, bool $only_cache = false): string
2990         {
2991                 $a = DI::app();
2992                 Hook::callAll('prepare_body_init', $item);
2993
2994                 // In order to provide theme developers more possibilities, event items
2995                 // are treated differently.
2996                 if ($item['object-type'] === Activity\ObjectType::EVENT && isset($item['event-id'])) {
2997                         $ev = Event::getItemHTML($item);
2998                         return $ev;
2999                 }
3000
3001                 $tags = Tag::populateFromItem($item);
3002
3003                 $item['tags'] = $tags['tags'];
3004                 $item['hashtags'] = $tags['hashtags'];
3005                 $item['mentions'] = $tags['mentions'];
3006
3007                 $body = $item['body'] ?? '';
3008
3009                 $fields = ['uri-id', 'uri', 'body', 'title', 'author-name', 'author-link', 'author-avatar', 'guid', 'created', 'plink', 'network', 'has-media', 'quote-uri-id', 'post-type'];
3010
3011                 $shared_uri_id = 0;
3012                 $shared_links  = [];
3013
3014                 $shared = DI::contentItem()->getSharedPost($item, $fields);
3015                 if (!empty($shared['post'])) {
3016                         $shared_item  = $shared['post'];
3017                         $quote_uri_id = $shared['post']['uri-id'];
3018                         $shared_links[] = strtolower($shared['post']['uri']);
3019                         $item['body'] = BBCode::removeSharedData($item['body']);
3020                 } elseif (empty($shared_item['uri-id']) && empty($item['quote-uri-id']) && ($item['network'] != Protocol::DIASPORA)) {
3021                         $media = Post\Media::getByURIId($item['uri-id'], [Post\Media::ACTIVITY]);
3022                         if (!empty($media)) {
3023                                 $shared_item = Post::selectFirst($fields, ['plink' => $media[0]['url'], 'uid' => [$item['uid'], 0]]);
3024
3025                                 if (empty($shared_item['uri-id'])) {
3026                                         $shared_item = Post::selectFirst($fields, ['uri' => $media[0]['url'], 'uid' => [$item['uid'], 0]]);
3027                                         $shared_links[] = strtolower($media[0]['url']);
3028                                 }
3029
3030                                 $quote_uri_id = $shared_item['uri-id'] ?? 0;
3031                         }
3032                 }
3033
3034                 if (!empty($quote_uri_id)) {
3035                         $item['body'] .= "\n" . DI::contentItem()->createSharedBlockByArray($shared_item);
3036                 }
3037
3038                 if (!empty($shared_item['uri-id'])) {
3039                         $shared_uri_id = $shared_item['uri-id'];
3040                         $shared_links[] = strtolower($shared_item['plink']);
3041                         $shared_attachments = Post\Media::splitAttachments($shared_uri_id, [], $shared_item['has-media']);
3042                         $shared_links = array_merge($shared_links, array_column($shared_attachments['visual'], 'url'));
3043                         $shared_links = array_merge($shared_links, array_column($shared_attachments['link'], 'url'));
3044                         $shared_links = array_merge($shared_links, array_column($shared_attachments['additional'], 'url'));
3045                         $item['body'] = self::replaceVisualAttachments($shared_attachments, $item['body']);
3046                 }
3047
3048                 $attachments = Post\Media::splitAttachments($item['uri-id'], $shared_links, $item['has-media'] ?? false);
3049                 $item['body'] = self::replaceVisualAttachments($attachments, $item['body'] ?? '');
3050
3051                 $item['body'] = preg_replace("/\s*\[attachment .*?\].*?\[\/attachment\]\s*/ism", "\n", $item['body']);
3052                 self::putInCache($item);
3053                 $item['body'] = $body;
3054                 $s = $item["rendered-html"];
3055
3056                 if ($only_cache) {
3057                         return '';
3058                 }
3059
3060                 // Compile eventual content filter reasons
3061                 $filter_reasons = [];
3062                 if (!$is_preview && DI::userSession()->getPublicContactId() != $item['author-id']) {
3063                         if (!empty($item['content-warning']) && (!DI::userSession()->getLocalUserId() || !DI::pConfig()->get(DI::userSession()->getLocalUserId(), 'system', 'disable_cw', false))) {
3064                                 $filter_reasons[] = DI::l10n()->t('Content warning: %s', $item['content-warning']);
3065                         }
3066
3067                         $item['attachments'] = $attachments;
3068
3069                         $hook_data = [
3070                                 'item' => $item,
3071                                 'filter_reasons' => $filter_reasons
3072                         ];
3073                         Hook::callAll('prepare_body_content_filter', $hook_data);
3074                         $filter_reasons = $hook_data['filter_reasons'];
3075                         unset($hook_data);
3076                 }
3077
3078                 $hook_data = [
3079                         'item' => $item,
3080                         'html' => $s,
3081                         'preview' => $is_preview,
3082                         'filter_reasons' => $filter_reasons
3083                 ];
3084                 Hook::callAll('prepare_body', $hook_data);
3085                 $s = $hook_data['html'];
3086                 unset($hook_data);
3087
3088                 if (!$attach) {
3089                         // Replace the blockquotes with quotes that are used in mails.
3090                         $mailquote = '<blockquote type="cite" class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">';
3091                         $s = str_replace(['<blockquote>', '<blockquote class="spoiler">', '<blockquote class="author">'], [$mailquote, $mailquote, $mailquote], $s);
3092                         return $s;
3093                 }
3094
3095                 if (!empty($shared_attachments)) {
3096                         $s = self::addVisualAttachments($shared_attachments, $shared_item, $s, true);
3097                         $s = self::addLinkAttachment($shared_uri_id ?: $item['uri-id'], $shared_attachments, $body, $s, true, []);
3098                         $s = self::addNonVisualAttachments($shared_attachments, $item, $s, true);
3099                         $body = BBCode::removeSharedData($body);
3100                 }
3101
3102                 $s = self::addVisualAttachments($attachments, $item, $s, false);
3103                 $s = self::addLinkAttachment($item['uri-id'], $attachments, $body, $s, false, $shared_links);
3104                 $s = self::addNonVisualAttachments($attachments, $item, $s, false);
3105                 $s = self::addQuestions($item, $s);
3106
3107                 // Map.
3108                 if (strpos($s, '<div class="map">') !== false && !empty($item['coord'])) {
3109                         $x = Map::byCoordinates(trim($item['coord']));
3110                         if ($x) {
3111                                 $s = preg_replace('/\<div class\=\"map\"\>/', '$0' . $x, $s);
3112                         }
3113                 }
3114
3115                 // Replace friendica image url size with theme preference.
3116                 if (!empty($a->getThemeInfoValue('item_image_size'))) {
3117                         $ps = $a->getThemeInfoValue('item_image_size');
3118                         $s = preg_replace('|(<img[^>]+src="[^"]+/photo/[0-9a-f]+)-[0-9]|', "$1-" . $ps, $s);
3119                 }
3120
3121                 $s = HTML::applyContentFilter($s, $filter_reasons);
3122
3123                 $hook_data = ['item' => $item, 'html' => $s];
3124                 Hook::callAll('prepare_body_final', $hook_data);
3125
3126                 return $hook_data['html'];
3127         }
3128
3129         /**
3130          * Check if the body contains a link
3131          *
3132          * @param string $body
3133          * @param string $url
3134          * @param int    $type
3135          * @return bool
3136          */
3137         public static function containsLink(string $body, string $url, int $type = 0): bool
3138         {
3139                 // Make sure that for example site parameters aren't used when testing if the link is contained in the body
3140                 $urlparts = parse_url($url);
3141                 if (empty($urlparts)) {
3142                         return false;
3143                 }
3144
3145                 unset($urlparts['query']);
3146                 unset($urlparts['fragment']);
3147
3148                 try {
3149                         $url = (string)Uri::fromParts($urlparts);
3150                 } catch (\InvalidArgumentException $e) {
3151                         DI::logger()->notice('Invalid URL', ['$url' => $url, '$urlparts' => $urlparts]);
3152                         /* See https://github.com/friendica/friendica/issues/12113
3153                          * Malformed URLs will result in a Fatal Error
3154                          */
3155                         return false;
3156                 }
3157
3158                 // Remove media links to only search in embedded content
3159                 // @todo Check images for image link, audio for audio links, ...
3160                 if (in_array($type, [Post\Media::AUDIO, Post\Media::VIDEO, Post\Media::IMAGE])) {
3161                         $body = preg_replace("/\[url=[^\[\]]*\](.*)\[\/url\]/Usi", ' $1 ', $body);
3162                 }
3163
3164                 if (strpos($body, $url)) {
3165                         return true;
3166                 }
3167
3168                 foreach ([0, 1, 2] as $size) {
3169                         if (preg_match('#/photo/.*-' . $size . '\.#ism', $url) &&
3170                                 strpos(preg_replace('#(/photo/.*)-[012]\.#ism', '$1-' . $size . '.', $body), $url)) {
3171                                 return true;
3172                         }
3173                 }
3174
3175                 return false;
3176         }
3177
3178         /**
3179          * Replace visual attachments in the body
3180          *
3181          * @param array $attachments
3182          * @param string $body
3183          * @return string modified body
3184          */
3185         private static function replaceVisualAttachments(array $attachments, string $body): string
3186         {
3187                 DI::profiler()->startRecording('rendering');
3188
3189                 foreach ($attachments['visual'] as $attachment) {
3190                         if (!empty($attachment['preview'])) {
3191                                 $proxy   = Post\Media::getPreviewUrlForId($attachment['id'], Proxy::SIZE_LARGE);
3192                                 $search  = ['[img=' . $attachment['preview'] . ']', ']' . $attachment['preview'] . '[/img]'];
3193                                 $replace = ['[img=' . $proxy . ']', ']' . $proxy . '[/img]'];
3194
3195                                 $body = str_replace($search, $replace, $body);
3196                         } elseif ($attachment['filetype'] == 'image') {
3197                                 $proxy   = Post\Media::getUrlForId($attachment['id']);
3198                                 $search  = ['[img=' . $attachment['url'] . ']', ']' . $attachment['url'] . '[/img]'];
3199                                 $replace = ['[img=' . $proxy . ']', ']' . $proxy . '[/img]'];
3200
3201                                 $body = str_replace($search, $replace, $body);
3202                         }
3203                 }
3204                 DI::profiler()->stopRecording();
3205                 return $body;
3206         }
3207
3208         /**
3209          * Add visual attachments to the content
3210          *
3211          * @param array $attachments
3212          * @param array $item
3213          * @param string $content
3214          * @return string modified content
3215          */
3216         private static function addVisualAttachments(array $attachments, array $item, string $content, bool $shared): string
3217         {
3218                 DI::profiler()->startRecording('rendering');
3219                 $leading = '';
3220                 $trailing = '';
3221
3222                 // @todo In the future we should make a single for the template engine with all media in it. This allows more flexibilty.
3223                 foreach ($attachments['visual'] as $attachment) {
3224                         if (self::containsLink($item['body'], $attachment['preview'] ?? $attachment['url'], $attachment['type'])) {
3225                                 continue;
3226                         }
3227
3228                         if ($attachment['filetype'] == 'image') {
3229                                 $preview_url = Post\Media::getPreviewUrlForId($attachment['id'], ($attachment['width'] > $attachment['height']) ? Proxy::SIZE_MEDIUM : Proxy::SIZE_LARGE);
3230                         } elseif (!empty($attachment['preview'])) {
3231                                 $preview_url = Post\Media::getPreviewUrlForId($attachment['id'], Proxy::SIZE_LARGE);
3232                         } else {
3233                                 $preview_url = '';
3234                         }
3235
3236                         if ($preview_url && self::containsLink($item['body'], $preview_url)) {
3237                                 continue;
3238                         }
3239
3240                         if (($attachment['filetype'] == 'video')) {
3241                                 /// @todo Move the template to /content as well
3242                                 $media = Renderer::replaceMacros(Renderer::getMarkupTemplate('video_top.tpl'), [
3243                                         '$video' => [
3244                                                 'id'      => $attachment['id'],
3245                                                 'src'     => $attachment['url'],
3246                                                 'name'    => $attachment['name'] ?: $attachment['url'],
3247                                                 'preview' => $preview_url,
3248                                                 'mime'    => $attachment['mimetype'],
3249                                         ],
3250                                 ]);
3251                                 if (($item['post-type'] ?? null) == Item::PT_VIDEO) {
3252                                         $leading .= $media;
3253                                 } else {
3254                                         $trailing .= $media;
3255                                 }
3256                         } elseif ($attachment['filetype'] == 'audio') {
3257                                 $media = Renderer::replaceMacros(Renderer::getMarkupTemplate('content/audio.tpl'), [
3258                                         '$audio' => [
3259                                                 'id'     => $attachment['id'],
3260                                                 'src'    => $attachment['url'],
3261                                                 'name'   => $attachment['name'] ?: $attachment['url'],
3262                                                 'mime'   => $attachment['mimetype'],
3263                                         ],
3264                                 ]);
3265                                 if (($item['post-type'] ?? null) == Item::PT_AUDIO) {
3266                                         $leading .= $media;
3267                                 } else {
3268                                         $trailing .= $media;
3269                                 }
3270                         } elseif ($attachment['filetype'] == 'image') {
3271                                 $src_url = Post\Media::getUrlForId($attachment['id']);
3272                                 if (self::containsLink($item['body'], $src_url)) {
3273                                         continue;
3274                                 }
3275                                 $media = Renderer::replaceMacros(Renderer::getMarkupTemplate('content/image.tpl'), [
3276                                         '$image' => [
3277                                                 'src'        => $src_url,
3278                                                 'preview'    => $preview_url,
3279                                                 'attachment' => $attachment,
3280                                         ],
3281                                 ]);
3282                                 // On Diaspora posts the attached pictures are leading
3283                                 if ($item['network'] == Protocol::DIASPORA) {
3284                                         $leading .= $media;
3285                                 } else {
3286                                         $trailing .= $media;
3287                                 }
3288                         }
3289                 }
3290
3291                 if ($shared) {
3292                         $content = str_replace(BBCode::TOP_ANCHOR, '<div class="body-attach">' . $leading . '<div class="clear"></div></div>' . BBCode::TOP_ANCHOR, $content);
3293                         $content = str_replace(BBCode::BOTTOM_ANCHOR, '<div class="body-attach">' . $trailing . '<div class="clear"></div></div>' . BBCode::BOTTOM_ANCHOR, $content);
3294                 } else {
3295                         if ($leading != '') {
3296                                 $content = '<div class="body-attach">' . $leading . '<div class="clear"></div></div>' . $content;
3297                         }
3298
3299                         if ($trailing != '') {
3300                                 $content .= '<div class="body-attach">' . $trailing . '<div class="clear"></div></div>';
3301                         }
3302                 }
3303
3304                 DI::profiler()->stopRecording();
3305                 return $content;
3306         }
3307
3308         /**
3309          * Add link attachment to the content
3310          *
3311          * @param array  $attachments
3312          * @param string $body
3313          * @param string $content
3314          * @param bool   $shared
3315          * @param array  $ignore_links A list of URLs to ignore
3316          * @return string modified content
3317          */
3318         private static function addLinkAttachment(int $uriid, array $attachments, string $body, string $content, bool $shared, array $ignore_links): string
3319         {
3320                 DI::profiler()->startRecording('rendering');
3321                 // Don't show a preview when there is a visual attachment (audio or video)
3322                 $types = array_column($attachments['visual'], 'type');
3323                 $preview = !in_array(Post\Media::IMAGE, $types) && !in_array(Post\Media::VIDEO, $types);
3324
3325                 if (!empty($attachments['link'])) {
3326                         foreach ($attachments['link'] as $link) {
3327                                 $found = false;
3328                                 foreach ($ignore_links as $ignore_link) {
3329                                         if (Strings::compareLink($link['url'], $ignore_link)) {
3330                                                 $found = true;
3331                                         }
3332                                 }
3333                                 // @todo Judge between the links to use the one with most information
3334                                 if (!$found && (empty($attachment) || !empty($link['author-name']) ||
3335                                         (empty($attachment['name']) && !empty($link['name'])) ||
3336                                         (empty($attachment['description']) && !empty($link['description'])) ||
3337                                         (empty($attachment['preview']) && !empty($link['preview'])))) {
3338                                         $attachment = $link;
3339                                 }
3340                         }
3341                 }
3342
3343                 if (!empty($attachment)) {
3344                         $data = [
3345                                 'after' => '',
3346                                 'author_name' => $attachment['author-name'] ?? '',
3347                                 'author_url' =>  $attachment['author-url'] ?? '',
3348                                 'description' => $attachment['description'] ?? '',
3349                                 'image' => '',
3350                                 'preview' => '',
3351                                 'provider_name' => $attachment['publisher-name'] ?? '',
3352                                 'provider_url' => $attachment['publisher-url'] ?? '',
3353                                 'text' => '',
3354                                 'title' => $attachment['name'] ?? '',
3355                                 'type' => 'link',
3356                                 'url' => $attachment['url']];
3357
3358                         if ($preview && !empty($attachment['preview'])) {
3359                                 if ($attachment['preview-width'] >= 500) {
3360                                         $data['image'] = Post\Media::getPreviewUrlForId($attachment['id'], Proxy::SIZE_MEDIUM);
3361                                 } else {
3362                                         $data['preview'] = Post\Media::getPreviewUrlForId($attachment['id'], Proxy::SIZE_MEDIUM);
3363                                 }
3364                         }
3365
3366                         if (!empty($data['description']) && !empty($content)) {
3367                                 similar_text($data['description'], $content, $percent);
3368                         } else {
3369                                 $percent = 0;
3370                         }
3371
3372                         if (!empty($data['description']) && (($data['title'] == $data['description']) || ($percent > 95) || (strpos($content, $data['description']) !== false))) {
3373                                 $data['description'] = '';
3374                         }
3375
3376                         if (($data['author_name'] ?? '') == ($data['provider_name'] ?? '')) {
3377                                 $data['author_name'] = '';
3378                         }
3379
3380                         if (($data['author_url'] ?? '') == ($data['provider_url'] ?? '')) {
3381                                 $data['author_url'] = '';
3382                         }
3383                 } elseif (preg_match("/.*(\[attachment.*?\].*?\[\/attachment\]).*/ism", $body, $match)) {
3384                         $data = BBCode::getAttachmentData($match[1]);
3385                 }
3386                 DI::profiler()->stopRecording();
3387
3388                 if (isset($data['url']) && !in_array(strtolower($data['url']), $ignore_links)) {
3389                         if (!empty($data['description']) || !empty($data['image']) || !empty($data['preview'])) {
3390                                 $parts = parse_url($data['url']);
3391                                 if (!empty($parts['scheme']) && !empty($parts['host'])) {
3392                                         if (empty($data['provider_name'])) {
3393                                                 $data['provider_name'] = $parts['host'];
3394                                         }
3395                                         if (empty($data['provider_url']) || empty(parse_url($data['provider_url'], PHP_URL_SCHEME))) {
3396                                                 $data['provider_url'] = $parts['scheme'] . '://' . $parts['host'];
3397
3398                                                 if (!empty($parts['port'])) {
3399                                                         $data['provider_url'] .= ':' . $parts['port'];
3400                                                 }
3401                                         }
3402                                 }
3403
3404                                 // @todo Use a template
3405                                 $rendered = BBCode::convertAttachment('', BBCode::INTERNAL, false, $data, $uriid);
3406                         } elseif (!self::containsLink($content, $data['url'], Post\Media::HTML)) {
3407                                 $rendered = Renderer::replaceMacros(Renderer::getMarkupTemplate('content/link.tpl'), [
3408                                         '$url'  => $data['url'],
3409                                         '$title' => $data['title'],
3410                                 ]);
3411                         } else {
3412                                 return $content;
3413                         }
3414
3415                         if ($shared) {
3416                                 return str_replace(BBCode::BOTTOM_ANCHOR, BBCode::BOTTOM_ANCHOR . $rendered, $content);
3417                         } else {
3418                                 return $content . $rendered;
3419                         }
3420                 }
3421                 return $content;
3422         }
3423
3424         /**
3425          * Add non visual attachments to the content
3426          *
3427          * @param array $attachments
3428          * @param array $item
3429          * @param string $content
3430          * @return string modified content
3431          */
3432         private static function addNonVisualAttachments(array $attachments, array $item, string $content): string
3433         {
3434                 DI::profiler()->startRecording('rendering');
3435                 $trailing = '';
3436                 foreach ($attachments['additional'] as $attachment) {
3437                         if (strpos($item['body'], $attachment['url'])) {
3438                                 continue;
3439                         }
3440
3441                         $author = ['uid' => 0, 'id' => $item['author-id'],
3442                                 'network' => $item['author-network'], 'url' => $item['author-link']];
3443                         $the_url = Contact::magicLinkByContact($author, $attachment['url']);
3444
3445                         $title = Strings::escapeHtml(trim(($attachment['description'] ?? '') ?: $attachment['url']));
3446
3447                         if (!empty($attachment['size'])) {
3448                                 $title .= ' ' . $attachment['size'] . ' ' . DI::l10n()->t('bytes');
3449                         }
3450
3451                         /// @todo Use a template
3452                         $icon = '<div class="attachtype icon s22 type-' . $attachment['filetype'] . ' subtype-' . $attachment['subtype'] . '"></div>';
3453                         $trailing .= '<a href="' . strip_tags($the_url) . '" title="' . $title . '" class="attachlink" target="_blank" rel="noopener noreferrer" >' . $icon . '</a>';
3454                 }
3455
3456                 if ($trailing != '') {
3457                         $content .= '<div class="body-attach">' . $trailing . '<div class="clear"></div></div>';
3458                 }
3459
3460                 DI::profiler()->stopRecording();
3461                 return $content;
3462         }
3463
3464         private static function addQuestions(array $item, string $content): string
3465         {
3466                 DI::profiler()->startRecording('rendering');
3467                 if (!empty($item['question-id'])) {
3468                         $question = [
3469                                 'id'       => $item['question-id'],
3470                                 'multiple' => $item['question-multiple'],
3471                                 'voters'   => $item['question-voters'],
3472                                 'endtime'  => $item['question-end-time']
3473                         ];
3474
3475                         $options = Post\QuestionOption::getByURIId($item['uri-id']);
3476                         foreach ($options as $key => $option) {
3477                                 if ($question['voters'] > 0) {
3478                                         $percent = $option['replies'] / $question['voters'] * 100;
3479                                         $options[$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));
3480                                 } else {
3481                                         $options[$key]['vote'] = DI::l10n()->tt('%2$s (%1$d vote)', '%2$s (%1$d votes)', $option['replies'], $option['name']);
3482                                 }
3483                         }
3484
3485                         if (!empty($question['voters']) && !empty($question['endtime'])) {
3486                                 $summary = DI::l10n()->tt('%d voter. Poll end: %s', '%d voters. Poll end: %s', $question['voters'], Temporal::getRelativeDate($question['endtime']));
3487                         } elseif (!empty($question['voters'])) {
3488                                 $summary = DI::l10n()->tt('%d voter.', '%d voters.', $question['voters']);
3489                         } elseif (!empty($question['endtime'])) {
3490                                 $summary = DI::l10n()->t('Poll end: %s', Temporal::getRelativeDate($question['endtime']));
3491                         } else {
3492                                 $summary = '';
3493                         }
3494
3495                         $content .= Renderer::replaceMacros(Renderer::getMarkupTemplate('content/question.tpl'), [
3496                                 '$question' => $question,
3497                                 '$options'  => $options,
3498                                 '$summary'  => $summary,
3499                         ]);
3500         }
3501                 DI::profiler()->stopRecording();
3502                 return $content;
3503         }
3504
3505         /**
3506          * get private link for item
3507          *
3508          * @param array $item
3509          * @return boolean|array False if item has not plink, otherwise array('href'=>plink url, 'title'=>translated title)
3510          * @throws \Exception
3511          */
3512         public static function getPlink(array $item)
3513         {
3514                 if (!empty($item['plink']) && Network::isValidHttpUrl($item['plink'])) {
3515                         $plink = $item['plink'];
3516                 } elseif (!empty($item['uri']) && Network::isValidHttpUrl($item['uri']) && !Network::isLocalLink($item['uri'])) {
3517                         $plink = $item['uri'];
3518                 }
3519
3520                 if (DI::userSession()->getLocalUserId()) {
3521                         $ret = [
3522                                 'href' => "display/" . $item['guid'],
3523                                 'orig' => "display/" . $item['guid'],
3524                                 'title' => DI::l10n()->t('View on separate page'),
3525                                 'orig_title' => DI::l10n()->t('View on separate page'),
3526                         ];
3527
3528                         if (!empty($plink) && ($item['private'] == self::PRIVATE)) {
3529                                 $author = ['uid' => 0, 'id' => $item['author-id'],
3530                                         'network' => $item['author-network'], 'url' => $item['author-link']];
3531                                 $plink = Contact::magicLinkByContact($author, $plink);
3532                         }
3533
3534                         if (!empty($plink)) {
3535                                 $ret['href'] = DI::baseUrl()->remove($plink);
3536                                 $ret['title'] = DI::l10n()->t('Link to source');
3537                         }
3538                 } elseif (!empty($plink) && ($item['private'] != self::PRIVATE)) {
3539                         $ret = [
3540                                 'href' => $plink,
3541                                 'orig' => $plink,
3542                                 'title' => DI::l10n()->t('Link to source'),
3543                                 'orig_title' => DI::l10n()->t('Link to source'),
3544                         ];
3545                 } else {
3546                         $ret = [];
3547                 }
3548
3549                 return $ret;
3550         }
3551
3552         /**
3553          * Does the given uri-id belongs to a post that is sent as starting post to a forum?
3554          *
3555          * @param int $uri_id
3556          *
3557          * @return boolean "true" when it is a forum post
3558          */
3559         public static function isForumPost(int $uri_id): bool
3560         {
3561                 foreach (Tag::getByURIId($uri_id, [Tag::EXCLUSIVE_MENTION]) as $tag) {
3562                         if (DBA::exists('contact', ['uid' => 0, 'nurl' => Strings::normaliseLink($tag['url']), 'contact-type' => Contact::TYPE_COMMUNITY])) {
3563                                 return true;
3564                         }
3565                 }
3566                 return false;
3567         }
3568
3569         /**
3570          * Search item id for given URI or plink
3571          *
3572          * @param string $uri
3573          * @param integer $uid
3574          *
3575          * @return integer item id
3576          */
3577         public static function searchByLink(string $uri, int $uid = 0): int
3578         {
3579                 $ssl_uri = str_replace('http://', 'https://', $uri);
3580                 $uris = [$uri, $ssl_uri, Strings::normaliseLink($uri)];
3581
3582                 $item = Post::selectFirst(['id'], ['uri' => $uris, 'uid' => $uid]);
3583                 if (DBA::isResult($item)) {
3584                         return $item['id'];
3585                 }
3586
3587                 $item = Post::selectFirst(['id'], ['plink' => $uris, 'uid' => $uid]);
3588                 if (DBA::isResult($item)) {
3589                         return $item['id'];
3590                 }
3591
3592                 return 0;
3593         }
3594
3595         /**
3596          * Return the URI for a link to the post
3597          *
3598          * @param string $uri URI or link to post
3599          *
3600          * @return string URI
3601          */
3602         public static function getURIByLink(string $uri): string
3603         {
3604                 $ssl_uri = str_replace('http://', 'https://', $uri);
3605                 $uris = [$uri, $ssl_uri, Strings::normaliseLink($uri)];
3606
3607                 $item = Post::selectFirst(['uri'], ['uri' => $uris]);
3608                 if (DBA::isResult($item)) {
3609                         return $item['uri'];
3610                 }
3611
3612                 $item = Post::selectFirst(['uri'], ['plink' => $uris]);
3613                 if (DBA::isResult($item)) {
3614                         return $item['uri'];
3615                 }
3616
3617                 return '';
3618         }
3619
3620         /**
3621          * Fetches item for given URI or plink
3622          *
3623          * @param string $uri
3624          * @param integer $uid
3625          *
3626          * @return integer item id
3627          */
3628         public static function fetchByLink(string $uri, int $uid = 0): int
3629         {
3630                 Logger::info('Trying to fetch link', ['uid' => $uid, 'uri' => $uri]);
3631                 $item_id = self::searchByLink($uri, $uid);
3632                 if (!empty($item_id)) {
3633                         Logger::info('Link found', ['uid' => $uid, 'uri' => $uri, 'id' => $item_id]);
3634                         return $item_id;
3635                 }
3636
3637                 $hookData = [
3638                         'uri'     => $uri,
3639                         'uid'     => $uid,
3640                         'item_id' => null,
3641                 ];
3642
3643                 Hook::callAll('item_by_link', $hookData);
3644
3645                 if (isset($hookData['item_id'])) {
3646                         return is_numeric($hookData['item_id']) ? $hookData['item_id'] : 0;
3647                 }
3648
3649                 $fetched_uri = ActivityPub\Processor::fetchMissingActivity($uri);
3650
3651                 if ($fetched_uri) {
3652                         $item_id = self::searchByLink($fetched_uri, $uid);
3653                 } else {
3654                         $item_id = Diaspora::fetchByURL($uri);
3655                 }
3656
3657                 if (!empty($item_id)) {
3658                         Logger::info('Link fetched', ['uid' => $uid, 'uri' => $uri, 'id' => $item_id]);
3659                         return $item_id;
3660                 }
3661
3662                 Logger::info('Link not found', ['uid' => $uid, 'uri' => $uri]);
3663                 return 0;
3664         }
3665
3666         /**
3667          * Check a prospective item array against user-level permissions
3668          *
3669          * @param array $item Expected keys: uri, gravity, and
3670          *                    author-link if is author-id is set,
3671          *                    owner-link if is owner-id is set,
3672          *                    causer-link if is causer-id is set.
3673          * @param int   $user_id Local user ID
3674          * @return bool
3675          * @throws \Exception
3676          */
3677         protected static function isAllowedByUser(array $item, int $user_id): bool
3678         {
3679                 if (!empty($item['author-id']) && Contact\User::isBlocked($item['author-id'], $user_id)) {
3680                         Logger::notice('Author is blocked by user', ['author-link' => $item['author-link'], 'uid' => $user_id, 'item-uri' => $item['uri']]);
3681                         return false;
3682                 }
3683
3684                 if (!empty($item['owner-id']) && Contact\User::isBlocked($item['owner-id'], $user_id)) {
3685                         Logger::notice('Owner is blocked by user', ['owner-link' => $item['owner-link'], 'uid' => $user_id, 'item-uri' => $item['uri']]);
3686                         return false;
3687                 }
3688
3689                 // The causer is set during a thread completion, for example because of a reshare. It countains the responsible actor.
3690                 if (!empty($item['causer-id']) && Contact\User::isBlocked($item['causer-id'], $user_id)) {
3691                         Logger::notice('Causer is blocked by user', ['causer-link' => $item['causer-link'] ?? $item['causer-id'], 'uid' => $user_id, 'item-uri' => $item['uri']]);
3692                         return false;
3693                 }
3694
3695                 if (!empty($item['causer-id']) && ($item['gravity'] === self::GRAVITY_PARENT) && Contact\User::isIgnored($item['causer-id'], $user_id)) {
3696                         Logger::notice('Causer is ignored by user', ['causer-link' => $item['causer-link'] ?? $item['causer-id'], 'uid' => $user_id, 'item-uri' => $item['uri']]);
3697                         return false;
3698                 }
3699
3700                 return true;
3701         }
3702
3703         /**
3704          * Fetch the uri-id of a quote
3705          *
3706          * @param string $body
3707          * @return integer
3708          */
3709         public static function getQuoteUriId(string $body, int $uid = 0): int
3710         {
3711                 $shared = BBCode::fetchShareAttributes($body);
3712                 if (empty($shared['guid']) && empty($shared['message_id'])) {
3713                         return 0;
3714                 }
3715
3716                 if (empty($shared['link']) && empty($shared['message_id'])) {
3717                         Logger::notice('Invalid share block.', ['share' => $shared]);
3718                         return 0;
3719                 }
3720
3721                 if (!empty($shared['guid'])) {
3722                         $shared_item = Post::selectFirst(['uri-id'], ['guid' => $shared['guid'], 'uid' => [0, $uid]]);
3723                         if (!empty($shared_item['uri-id'])) {
3724                                 Logger::debug('Found post by guid', ['guid' => $shared['guid'], 'uid' => $uid]);
3725                                 return $shared_item['uri-id'];
3726                         }
3727                 }
3728
3729                 if (!empty($shared['message_id'])) {
3730                         $shared_item = Post::selectFirst(['uri-id'], ['uri' => $shared['message_id'], 'uid' => [0, $uid]]);
3731                         if (!empty($shared_item['uri-id'])) {
3732                                 Logger::debug('Found post by message_id', ['message_id' => $shared['message_id'], 'uid' => $uid]);
3733                                 return $shared_item['uri-id'];
3734                         }
3735                 }
3736
3737                 if (!empty($shared['link'])) {
3738                         $shared_item = Post::selectFirst(['uri-id'], ['plink' => $shared['link'], 'uid' => [0, $uid]]);
3739                         if (!empty($shared_item['uri-id'])) {
3740                                 Logger::debug('Found post by link', ['link' => $shared['link'], 'uid' => $uid]);
3741                                 return $shared_item['uri-id'];
3742                         }
3743                 }
3744
3745                 $url = $shared['message_id'] ?: $shared['link'];
3746                 $id = self::fetchByLink($url);
3747                 if (!$id) {
3748                         Logger::notice('Post could not be fetched.', ['url' => $url, 'uid' => $uid]);
3749                         return 0;
3750                 }
3751
3752                 $shared_item = Post::selectFirst(['uri-id'], ['id' => $id]);
3753                 if (!empty($shared_item['uri-id'])) {
3754                         Logger::debug('Fetched shared post', ['id' => $id, 'url' => $url, 'uid' => $uid]);
3755                         return $shared_item['uri-id'];
3756                 }
3757
3758                 Logger::warning('Post does not exist although it was supposed to had been fetched.', ['id' => $id, 'url' => $url, 'uid' => $uid]);
3759                 return 0;
3760         }
3761 }