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