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'], $fields['body'], $item['author-network']);
 224                                 Post\Content::update($item['uri-id'], $content_fields);
 225                         }
 226
 227                         if (!empty($fields['file'])) {
 228                                 Post\Category::storeTextByURIId($item['uri-id'], $item['uid'], $fields['file']);
 229                         }
 230
 231                         if (!empty($fields['attach'])) {
 232                                 Post\Media::insertFromAttachment($item['uri-id'], $fields['attach']);
 233                         }
 234
 235                         // We only need to notfiy others when it is an original entry from us.
 236                         // Only call the notifier when the item had been edited and records had been changed.
 237                         if ($item['origin'] && !empty($fields['edited']) && ($previous['edited'] != $fields['edited'])) {
 238                                 $notify_items[] = $item['id'];
 239                         }
 240                 }
 241
 242                 DBA::close($items);
 243
 244                 foreach ($notify_items as $notify_item) {
 245                         $post = Post::selectFirst(['uri-id', 'uid'], ['id' => $notify_item]);
 246                         Worker::add(Worker::PRIORITY_HIGH, 'Notifier', Delivery::POST, (int)$post['uri-id'], (int)$post['uid']);
 247                 }
 248
 249                 return $rows;
 250         }
 251
 252         /**
 253          * Delete an item and notify others about it - if it was ours
 254          *
 255          * @param array   $condition The condition for finding the item entries
 256          * @param integer $priority  Priority for the notification
 257          * @return void
 258          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 259          */
 260         public static function markForDeletion(array $condition, int $priority = Worker::PRIORITY_HIGH)
 261         {
 262                 $items = Post::select(['id'], $condition);
 263                 while ($item = Post::fetch($items)) {
 264                         self::markForDeletionById($item['id'], $priority);
 265                 }
 266                 DBA::close($items);
 267         }
 268
 269         /**
 270          * Delete an item for an user and notify others about it - if it was ours
 271          *
 272          * @param array   $condition The condition for finding the item entries
 273          * @param integer $uid       User who wants to delete this item
 274          * @return void
 275          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 276          */
 277         public static function deleteForUser(array $condition, int $uid)
 278         {
 279                 if ($uid == 0) {
 280                         return;
 281                 }
 282
 283                 $items = Post::select(['id', 'uid', 'uri-id'], $condition);
 284                 while ($item = Post::fetch($items)) {
 285                         if (in_array($item['uid'], [$uid, 0])) {
 286                                 Post\User::update($item['uri-id'], $uid, ['hidden' => true], true);
 287                                 Post\ThreadUser::update($item['uri-id'], $uid, ['hidden' => true], true);
 288                         }
 289
 290                         if ($item['uid'] == $uid) {
 291                                 self::markForDeletionById($item['id'], Worker::PRIORITY_HIGH);
 292                         } elseif ($item['uid'] != 0) {
 293                                 Logger::warning('Wrong ownership. Not deleting item', ['id' => $item['id']]);
 294                         }
 295                 }
 296                 DBA::close($items);
 297         }
 298
 299         /**
 300          * Mark an item for deletion, delete related data and notify others about it - if it was ours
 301          *
 302          * @param integer $item_id
 303          * @param integer $priority Priority for the notification
 304          * @return boolean success
 305          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 306          */
 307         public static function markForDeletionById(int $item_id, int $priority = Worker::PRIORITY_HIGH): bool
 308         {
 309                 Logger::info('Mark item for deletion by id', ['id' => $item_id, 'callstack' => System::callstack()]);
 310                 // locate item to be deleted
 311                 $fields = ['id', 'uri', 'uri-id', 'uid', 'parent', 'parent-uri-id', 'origin',
 312                         'deleted', 'resource-id', 'event-id',
 313                         'verb', 'object-type', 'object', 'target', 'contact-id', 'psid', 'gravity'];
 314                 $item = Post::selectFirst($fields, ['id' => $item_id]);
 315                 if (!DBA::isResult($item)) {
 316                         Logger::info('Item not found.', ['id' => $item_id]);
 317                         return false;
 318                 }
 319
 320                 if ($item['deleted']) {
 321                         Logger::info('Item has already been marked for deletion.', ['id' => $item_id]);
 322                         return false;
 323                 }
 324
 325                 $parent = Post::selectFirst(['origin'], ['id' => $item['parent']]);
 326                 if (!DBA::isResult($parent)) {
 327                         $parent = ['origin' => false];
 328                 }
 329
 330                 // clean up categories and tags so they don't end up as orphans
 331                 Post\Category::deleteByURIId($item['uri-id'], $item['uid']);
 332
 333                 /*
 334                  * If item is a link to a photo resource, nuke all the associated photos
 335                  * (visitors will not have photo resources)
 336                  * This only applies to photos uploaded from the photos page. Photos inserted into a post do not
 337                  * generate a resource-id and therefore aren't intimately linked to the item.
 338                  */
 339                 /// @TODO: this should first check if photo is used elsewhere
 340                 if ($item['resource-id']) {
 341                         Photo::delete(['resource-id' => $item['resource-id'], 'uid' => $item['uid']]);
 342                 }
 343
 344                 // If item is a link to an event, delete the event.
 345                 if (intval($item['event-id'])) {
 346                         Event::delete($item['event-id']);
 347                 }
 348
 349                 // If item has attachments, drop them
 350                 $attachments = Post\Media::getByURIId($item['uri-id'], [Post\Media::DOCUMENT]);
 351                 foreach($attachments as $attachment) {
 352                         if (preg_match('|attach/(\d+)|', $attachment['url'], $matches)) {
 353                                 Attach::delete(['id' => $matches[1], 'uid' => $item['uid']]);
 354                         }
 355                 }
 356
 357                 // Set the item to "deleted"
 358                 $item_fields = ['deleted' => true, 'edited' => DateTimeFormat::utcNow(), 'changed' => DateTimeFormat::utcNow()];
 359                 Post::update($item_fields, ['id' => $item['id']]);
 360
 361                 Post\Category::storeTextByURIId($item['uri-id'], $item['uid'], '');
 362
 363                 if (!Post::exists(["`uri-id` = ? AND `uid` != 0 AND NOT `deleted`", $item['uri-id']])) {
 364                         self::markForDeletion(['uri-id' => $item['uri-id'], 'uid' => 0, 'deleted' => false], $priority);
 365                 }
 366
 367                 Post\DeliveryData::delete($item['uri-id']);
 368
 369                 // If it's the parent of a comment thread, kill all the kids
 370                 if ($item['gravity'] == self::GRAVITY_PARENT) {
 371                         self::markForDeletion(['parent' => $item['parent'], 'deleted' => false], $priority);
 372                 }
 373
 374                 // Is it our comment and/or our thread?
 375                 if (($item['origin'] || $parent['origin']) && ($item['uid'] != 0)) {
 376                         // When we delete the original post we will delete all existing copies on the server as well
 377                         self::markForDeletion(['uri-id' => $item['uri-id'], 'deleted' => false], $priority);
 378
 379                         // send the notification upstream/downstream
 380                         if ($priority) {
 381                                 Worker::add(['priority' => $priority, 'dont_fork' => true], 'Notifier', Delivery::DELETION, (int)$item['uri-id'], (int)$item['uid']);
 382                         }
 383                 } elseif ($item['uid'] != 0) {
 384                         Post\User::update($item['uri-id'], $item['uid'], ['hidden' => true]);
 385                         Post\ThreadUser::update($item['uri-id'], $item['uid'], ['hidden' => true]);
 386                 }
 387
 388                 DI::notify()->deleteForItem($item['uri-id']);
 389                 DI::notification()->deleteForItem($item['uri-id']);
 390
 391                 Logger::info('Item has been marked for deletion.', ['id' => $item_id]);
 392
 393                 return true;
 394         }
 395
 396         /**
 397          * Get guid from given item record
 398          *
 399          * @param array $item Item record
 400          * @param bool Whether to notify (?)
 401          * @return string Guid
 402          */
 403         public static function guid(array $item, bool $notify): string
 404         {
 405                 if (!empty($item['guid'])) {
 406                         return trim($item['guid']);
 407                 }
 408
 409                 if ($notify) {
 410                         // We have to avoid duplicates. So we create the GUID in form of a hash of the plink or uri.
 411                         // We add the hash of our own host because our host is the original creator of the post.
 412                         $prefix_host = DI::baseUrl()->getHostname();
 413                 } else {
 414                         $prefix_host = '';
 415
 416                         // We are only storing the post so we create a GUID from the original hostname.
 417                         if (!empty($item['author-link'])) {
 418                                 $parsed = parse_url($item['author-link']);
 419                                 if (!empty($parsed['host'])) {
 420                                         $prefix_host = $parsed['host'];
 421                                 }
 422                         }
 423
 424                         if (empty($prefix_host) && !empty($item['plink'])) {
 425                                 $parsed = parse_url($item['plink']);
 426                                 if (!empty($parsed['host'])) {
 427                                         $prefix_host = $parsed['host'];
 428                                 }
 429                         }
 430
 431                         if (empty($prefix_host) && !empty($item['uri'])) {
 432                                 $parsed = parse_url($item['uri']);
 433                                 if (!empty($parsed['host'])) {
 434                                         $prefix_host = $parsed['host'];
 435                                 }
 436                         }
 437
 438                         // Is it in the format data@host.tld? - Used for mail contacts
 439                         if (empty($prefix_host) && !empty($item['author-link']) && strstr($item['author-link'], '@')) {
 440                                 $mailparts = explode('@', $item['author-link']);
 441                                 $prefix_host = array_pop($mailparts);
 442                         }
 443                 }
 444
 445                 if (!empty($item['plink'])) {
 446                         $guid = self::guidFromUri($item['plink'], $prefix_host);
 447                 } elseif (!empty($item['uri'])) {
 448                         $guid = self::guidFromUri($item['uri'], $prefix_host);
 449                 } else {
 450                         $guid = System::createUUID(hash('crc32', $prefix_host));
 451                 }
 452
 453                 return $guid;
 454         }
 455
 456         /**
 457          * Returns contact id from given item record
 458          *
 459          * @param array $item Item record
 460          * @return int Contact id
 461          */
 462         private static function contactId(array $item): int
 463         {
 464                 if ($item['uid'] == 0) {
 465                         return $item['author-id'];
 466                 }
 467
 468                 if ($item['origin']) {
 469                         $owner = User::getOwnerDataById($item['uid']);
 470                         return $owner['id'];
 471                 }
 472
 473                 if (!empty($item['causer-id']) && Contact::isSharing($item['causer-id'], $item['uid'], true)) {
 474                         $cdata = Contact::getPublicAndUserContactID($item['causer-id'], $item['uid']);
 475                         if (!empty($cdata['user'])) {
 476                                 return $cdata['user'];
 477                         }
 478                 }
 479
 480                 if ($item['gravity'] == self::GRAVITY_PARENT) {
 481                         if (Contact::isSharingByURL($item['owner-link'], $item['uid'], true)) {
 482                                 $contact_id = Contact::getIdForURL($item['owner-link'], $item['uid']);
 483                         } else {
 484                                 $contact_id = Contact::getIdForURL($item['owner-link']);
 485                         }
 486                         if (!empty($contact_id)) {
 487                                 return $contact_id;
 488                         }
 489                 }
 490
 491                 if (Contact::isSharingByURL($item['author-link'], $item['uid'], true)) {
 492                         $contact_id = Contact::getIdForURL($item['author-link'], $item['uid']);
 493                 } else {
 494                         $contact_id = Contact::getIdForURL($item['author-link']);
 495                 }
 496
 497                 if (!empty($contact_id)) {
 498                         return $contact_id;
 499                 }
 500
 501                 Logger::warning('contact-id could not be fetched, using self contact instead.', ['uid' => $item['uid'], 'item' => $item]);
 502                 $self = Contact::selectFirst(['id'], ['self' => true, 'uid' => $item['uid']]);
 503                 return $self['id'];
 504         }
 505
 506         /**
 507          * Write an item array into a spool file to be inserted later.
 508          * This command is called whenever there are issues storing an item.
 509          *
 510          * @param array $item The item fields that are to be inserted
 511          * @throws \Exception
 512          */
 513         private static function spool(array $item)
 514         {
 515                 // Now we store the data in the spool directory
 516                 // We use "microtime" to keep the arrival order and "mt_rand" to avoid duplicates
 517                 $file = 'item-' . round(microtime(true) * 10000) . '-' . mt_rand() . '.msg';
 518
 519                 $spoolpath = System::getSpoolPath();
 520                 if ($spoolpath != '') {
 521                         $spool = $spoolpath . '/' . $file;
 522
 523                         file_put_contents($spool, json_encode($item));
 524                         Logger::warning("Item wasn't stored - Item was spooled into file", ['file' => $file]);
 525                 }
 526         }
 527
 528         /**
 529          * Check if the item array is a duplicate
 530          *
 531          * @param array $item Item record
 532          * @return boolean is it a duplicate?
 533          */
 534         private static function isDuplicate(array $item): bool
 535         {
 536                 // Checking if there is already an item with the same guid
 537                 $condition = ['guid' => $item['guid'], 'network' => $item['network'], 'uid' => $item['uid']];
 538                 if (Post::exists($condition)) {
 539                         Logger::notice('Found already existing item', $condition);
 540                         return true;
 541                 }
 542
 543                 $condition = ['uri-id' => $item['uri-id'], 'uid' => $item['uid'],
 544                         'network' => [$item['network'], Protocol::DFRN]];
 545                 if (Post::exists($condition)) {
 546                         Logger::notice('duplicated item with the same uri found.', $condition);
 547                         return true;
 548                 }
 549
 550                 // On Friendica and Diaspora the GUID is unique
 551                 if (in_array($item['network'], [Protocol::DFRN, Protocol::DIASPORA])) {
 552                         $condition = ['guid' => $item['guid'], 'uid' => $item['uid']];
 553                         if (Post::exists($condition)) {
 554                                 Logger::notice('duplicated item with the same guid found.', $condition);
 555                                 return true;
 556                         }
 557                 } elseif ($item['network'] == Protocol::OSTATUS) {
 558                         // Check for an existing post with the same content. There seems to be a problem with OStatus.
 559                         $condition = ["`body` = ? AND `network` = ? AND `created` = ? AND `contact-id` = ? AND `uid` = ?",
 560                                         $item['body'], $item['network'], $item['created'], $item['contact-id'], $item['uid']];
 561                         if (Post::exists($condition)) {
 562                                 Logger::notice('duplicated item with the same body found.', $item);
 563                                 return true;
 564                         }
 565                 }
 566
 567                 /*
 568                  * Check for already added items.
 569                  * There is a timing issue here that sometimes creates double postings.
 570                  * An unique index would help - but the limitations of MySQL (maximum size of index values) prevent this.
 571                  */
 572                 if (($item['uid'] == 0) && Post::exists(['uri-id' => $item['uri-id'], 'uid' => 0])) {
 573                         Logger::notice('Global item already stored.', ['uri-id' => $item['uri-id'], 'network' => $item['network']]);
 574                         return true;
 575                 }
 576
 577                 return false;
 578         }
 579
 580         /**
 581          * Check if the item array is valid
 582          *
 583          * @param array $item Item record
 584          * @return boolean item is valid
 585          */
 586         public static function isValid(array $item): bool
 587         {
 588                 // When there is no content then we don't post it
 589                 if (($item['body'] . $item['title'] == '') && empty($item['quote-uri-id']) && (empty($item['uri-id']) || !Post\Media::existsByURIId($item['uri-id']))) {
 590                         Logger::notice('No body, no title.');
 591                         return false;
 592                 }
 593
 594                 if (!empty($item['uid'])) {
 595                         $owner = User::getOwnerDataById($item['uid'], false);
 596                         if (!$owner) {
 597                                 Logger::warning('Missing item user owner data', ['uid' => $item['uid']]);
 598                                 return false;
 599                         }
 600
 601                         if ($owner['account_expired'] || $owner['account_removed']) {
 602                                 Logger::notice('Item user has been deleted/expired/removed', ['uid' => $item['uid'], 'deleted' => $owner['deleted'], 'account_expired' => $owner['account_expired'], 'account_removed' => $owner['account_removed']]);
 603                                 return false;
 604                         }
 605                 }
 606
 607                 if (!empty($item['author-id']) && Contact::isBlocked($item['author-id'])) {
 608                         Logger::notice('Author is blocked node-wide', ['author-link' => $item['author-link'], 'item-uri' => $item['uri']]);
 609                         return false;
 610                 }
 611
 612                 if (!empty($item['author-link']) && Network::isUrlBlocked($item['author-link'])) {
 613                         Logger::notice('Author server is blocked', ['author-link' => $item['author-link'], 'item-uri' => $item['uri']]);
 614                         return false;
 615                 }
 616
 617                 if (!empty($item['owner-id']) && Contact::isBlocked($item['owner-id'])) {
 618                         Logger::notice('Owner is blocked node-wide', ['owner-link' => $item['owner-link'], 'item-uri' => $item['uri']]);
 619                         return false;
 620                 }
 621
 622                 if (!empty($item['owner-link']) && Network::isUrlBlocked($item['owner-link'])) {
 623                         Logger::notice('Owner server is blocked', ['owner-link' => $item['owner-link'], 'item-uri' => $item['uri']]);
 624                         return false;
 625                 }
 626
 627                 if (!empty($item['uid']) && !self::isAllowedByUser($item, $item['uid'])) {
 628                         return false;
 629                 }
 630
 631                 if ($item['verb'] == Activity::FOLLOW) {
 632                         if (!$item['origin'] && ($item['author-id'] == Contact::getPublicIdByUserId($item['uid']))) {
 633                                 // Our own follow request can be relayed to us. We don't store it to avoid notification chaos.
 634                                 Logger::info("Follow: Don't store not origin follow request", ['parent-uri' => $item['parent-uri']]);
 635                                 return false;
 636                         }
 637
 638                         $condition = ['verb' => Activity::FOLLOW, 'uid' => $item['uid'],
 639                                 'parent-uri' => $item['parent-uri'], 'author-id' => $item['author-id']];
 640                         if (Post::exists($condition)) {
 641                                 // It happens that we receive multiple follow requests by the same author - we only store one.
 642                                 Logger::info('Follow: Found existing follow request from author', ['author-id' => $item['author-id'], 'parent-uri' => $item['parent-uri']]);
 643                                 return false;
 644                         }
 645                 }
 646
 647                 return true;
 648         }
 649
 650         /**
 651          * Check if the item array is too old
 652          *
 653          * @param array $item Item record
 654          * @return boolean item is too old
 655          */
 656         public static function isTooOld(array $item): bool
 657         {
 658                 // check for create date and expire time
 659                 $expire_interval = DI::config()->get('system', 'dbclean-expire-days', 0);
 660
 661                 $user = DBA::selectFirst('user', ['expire'], ['uid' => $item['uid']]);
 662                 if (DBA::isResult($user) && ($user['expire'] > 0) && (($user['expire'] < $expire_interval) || ($expire_interval == 0))) {
 663                         $expire_interval = $user['expire'];
 664                 }
 665
 666                 if (($expire_interval > 0) && !empty($item['created'])) {
 667                         $expire_date = time() - ($expire_interval * 86400);
 668                         $created_date = strtotime($item['created']);
 669                         if ($created_date < $expire_date) {
 670                                 Logger::notice('Item created before expiration interval.', [
 671                                         'created' => date('c', $created_date),
 672                                         'expired' => date('c', $expire_date),
 673                                         '$item' => $item
 674                                 ]);
 675                                 return true;
 676                         }
 677                 }
 678
 679                 return false;
 680         }
 681
 682         /**
 683          * Return the id of the given item array if it has been stored before
 684          *
 685          * @param array $item Item record
 686          * @return integer Item id or zero on error
 687          */
 688         private static function getDuplicateID(array $item): int
 689         {
 690                 if (empty($item['network']) || in_array($item['network'], Protocol::FEDERATED)) {
 691                         $condition = ['`uri-id` = ? AND `uid` = ? AND `network` IN (?, ?, ?, ?)',
 692                                 $item['uri-id'],
 693                                 $item['uid'],
 694                                 Protocol::ACTIVITYPUB,
 695                                 Protocol::DIASPORA,
 696                                 Protocol::DFRN,
 697                                 Protocol::OSTATUS
 698                         ];
 699                         $existing = Post::selectFirst(['id', 'network'], $condition);
 700                         if (DBA::isResult($existing)) {
 701                                 // We only log the entries with a different user id than 0. Otherwise we would have too many false positives
 702                                 if ($item['uid'] != 0) {
 703                                         Logger::notice('Item already existed for user', [
 704                                                 'uri-id' => $item['uri-id'],
 705                                                 'uid' => $item['uid'],
 706                                                 'network' => $item['network'],
 707                                                 'existing_id' => $existing['id'],
 708                                                 'existing_network' => $existing['network']
 709                                         ]);
 710                                 }
 711
 712                                 return $existing['id'];
 713                         }
 714                 }
 715                 return 0;
 716         }
 717
 718         /**
 719          * Fetch the uri-id of the parent for the given uri-id
 720          *
 721          * @param integer $uriid
 722          * @return integer
 723          */
 724         public static function getParent(int $uriid): int
 725         {
 726                 $thread_parent = Post::selectFirstPost(['thr-parent-id', 'gravity'], ['uri-id' => $uriid]);
 727                 if (empty($thread_parent)) {
 728                         return 0;
 729                 }
 730
 731                 if ($thread_parent['gravity'] == Item::GRAVITY_PARENT) {
 732                         return $uriid;
 733                 }
 734
 735                 return self::getParent($thread_parent['thr-parent-id']);
 736         }
 737
 738         /**
 739          * Fetch top-level parent data for the given item array
 740          *
 741          * @param array $item
 742          * @return array item array with parent data
 743          * @throws \Exception
 744          */
 745         private static function getTopLevelParent(array $item): array
 746         {
 747                 $fields = ['uid', 'uri', 'parent-uri', 'id', 'deleted',
 748                         'uri-id', 'parent-uri-id',
 749                         'allow_cid', 'allow_gid', 'deny_cid', 'deny_gid',
 750                         'wall', 'private', 'origin', 'author-id'];
 751                 $condition = ['uri-id' => [$item['thr-parent-id'], $item['parent-uri-id']], 'uid' => $item['uid']];
 752                 $params = ['order' => ['id' => false]];
 753                 $parent = Post::selectFirst($fields, $condition, $params);
 754
 755                 if (!DBA::isResult($parent) && Post::exists(['uri-id' => [$item['thr-parent-id'], $item['parent-uri-id']], 'uid' => 0])) {
 756                         $stored = Item::storeForUserByUriId($item['thr-parent-id'], $item['uid'], ['post-reason' => Item::PR_COMPLETION]);
 757                         if (!$stored && ($item['thr-parent-id'] != $item['parent-uri-id'])) {
 758                                 $stored = Item::storeForUserByUriId($item['parent-uri-id'], $item['uid'], ['post-reason' => Item::PR_COMPLETION]);
 759                         }
 760                         if ($stored) {
 761                                 Logger::info('Stored thread parent item for user', ['uri-id' => $item['thr-parent-id'], 'uid' => $item['uid'], 'stored' => $stored]);
 762                                 $parent = Post::selectFirst($fields, $condition, $params);
 763                         }
 764                 }
 765
 766                 if (!DBA::isResult($parent)) {
 767                         Logger::notice('item parent was not found - ignoring item', ['uri-id' => $item['uri-id'], 'thr-parent-id' => $item['thr-parent-id'], 'uid' => $item['uid'], 'callstack' => System::callstack(20)]);
 768                         return [];
 769                 }
 770
 771                 if ($parent['uri-id'] == $parent['parent-uri-id']) {
 772                         return $parent;
 773                 }
 774
 775                 $condition = ['uri-id' => $parent['parent-uri-id'],
 776                         'parent-uri-id' => $parent['parent-uri-id'],
 777                         'uid' => $parent['uid']];
 778                 $params = ['order' => ['id' => false]];
 779                 $toplevel_parent = Post::selectFirst($fields, $condition, $params);
 780
 781                 if (!DBA::isResult($toplevel_parent) && $item['origin']) {
 782                         $stored = Item::storeForUserByUriId($item['parent-uri-id'], $item['uid'], ['post-reason' => Item::PR_COMPLETION]);
 783                         Logger::info('Stored parent item for user', ['uri-id' => $item['parent-uri-id'], 'uid' => $item['uid'], 'stored' => $stored]);
 784                         $toplevel_parent = Post::selectFirst($fields, $condition, $params);
 785                 }
 786
 787                 if (!DBA::isResult($toplevel_parent)) {
 788                         Logger::notice('item top level parent was not found - ignoring item', ['parent-uri-id' => $parent['parent-uri-id'], 'uid' => $parent['uid']]);
 789                         return [];
 790                 }
 791
 792                 return $toplevel_parent;
 793         }
 794
 795         /**
 796          * Get the gravity for the given item array
 797          *
 798          * @param array $item
 799          * @return integer gravity
 800          */
 801         private static function getGravity(array $item): int
 802         {
 803                 $activity = DI::activity();
 804
 805                 if (isset($item['gravity'])) {
 806                         return intval($item['gravity']);
 807                 } elseif ($item['parent-uri-id'] === $item['uri-id']) {
 808                         return self::GRAVITY_PARENT;
 809                 } elseif ($activity->match($item['verb'], Activity::POST)) {
 810                         return self::GRAVITY_COMMENT;
 811                 } elseif ($activity->match($item['verb'], Activity::FOLLOW)) {
 812                         return self::GRAVITY_ACTIVITY;
 813                 } elseif ($activity->match($item['verb'], Activity::ANNOUNCE)) {
 814                         return self::GRAVITY_ACTIVITY;
 815                 }
 816
 817                 Logger::info('Unknown gravity for verb', ['verb' => $item['verb']]);
 818                 return self::GRAVITY_UNKNOWN;   // Should not happen
 819         }
 820
 821         private static function prepareOriginPost(array $item): array
 822         {
 823                 $item['wall'] = 1;
 824                 $item['origin'] = 1;
 825                 $item['network'] = Protocol::DFRN;
 826                 $item['protocol'] = Conversation::PARCEL_DIRECT;
 827                 $item['direction'] = Conversation::PUSH;
 828
 829                 $owner = User::getOwnerDataById($item['uid']);
 830
 831                 if (empty($item['contact-id'])) {
 832                         $item['contact-id'] = $owner['id'];
 833                 }
 834
 835                 if (empty($item['author-link']) && empty($item['author-id'])) {
 836                         $item['author-link']   = $owner['url'];
 837                         $item['author-name']   = $owner['name'];
 838                         $item['author-avatar'] = $owner['thumb'];
 839                 }
 840
 841                 if (empty($item['owner-link']) && empty($item['owner-id'])) {
 842                         $item['owner-link']   = $item['author-link'];
 843                         $item['owner-name']   = $item['author-name'];
 844                         $item['owner-avatar'] = $item['author-avatar'];
 845                 }
 846
 847                 // Setting the object type if not defined before
 848                 if (empty($item['object-type'])) {
 849                         $item['object-type'] = Activity\ObjectType::NOTE; // Default value
 850                         $objectdata = BBCode::getAttachedData($item['body']);
 851
 852                         if ($objectdata['type'] == 'link') {
 853                                 $item['object-type'] = Activity\ObjectType::BOOKMARK;
 854                         } elseif ($objectdata['type'] == 'video') {
 855                                 $item['object-type'] = Activity\ObjectType::VIDEO;
 856                         } elseif ($objectdata['type'] == 'photo') {
 857                                 $item['object-type'] = Activity\ObjectType::IMAGE;
 858                         }
 859                 }
 860
 861                 return $item;
 862         }
 863
 864         /**
 865          * Inserts item record
 866          *
 867          * @param array $item Item array to be inserted
 868          * @param int   $notify Notification (type?)
 869          * @param bool  $post_local (???)
 870          * @return int Zero means error, otherwise primary key (id) is being returned
 871          */
 872         public static function insert(array $item, int $notify = 0, bool $post_local = true): int
 873         {
 874                 $orig_item = $item;
 875
 876                 $priority = Worker::PRIORITY_HIGH;
 877
 878                 // If it is a posting where users should get notifications, then define it as wall posting
 879                 if ($notify) {
 880                         $item = self::prepareOriginPost($item);
 881
 882                         if (is_int($notify) && in_array($notify, Worker::PRIORITIES)) {
 883                                 $priority = $notify;
 884                         }
 885                 } else {
 886                         $item['network'] = trim(($item['network'] ?? '') ?: Protocol::PHANTOM);
 887                 }
 888
 889                 $uid = intval($item['uid']);
 890
 891                 $item['guid'] = self::guid($item, $notify);
 892                 $item['uri'] = substr(trim($item['uri'] ?? '') ?: self::newURI($item['guid']), 0, 255);
 893
 894                 // Store URI data
 895                 $item['uri-id'] = ItemURI::insert(['uri' => $item['uri'], 'guid' => $item['guid']]);
 896
 897                 // Backward compatibility: parent-uri used to be the direct parent uri.
 898                 // If it is provided without a thr-parent, it probably is the old behavior.
 899                 if (empty($item['thr-parent']) || empty($item['parent-uri'])) {
 900                         $item['thr-parent'] = trim($item['thr-parent'] ?? $item['parent-uri'] ?? $item['uri']);
 901                         $item['parent-uri'] = $item['thr-parent'];
 902                 }
 903
 904                 $item['thr-parent-id'] = ItemURI::getIdByURI($item['thr-parent']);
 905                 $item['parent-uri-id'] = ItemURI::getIdByURI($item['parent-uri']);
 906
 907                 // Store conversation data
 908                 $source = $item['source'] ?? '';
 909                 unset($item['conversation-uri']);
 910                 unset($item['conversation-href']);
 911                 unset($item['source']);
 912
 913                 /*
 914                  * Do we already have this item?
 915                  * We have to check several networks since Friendica posts could be repeated
 916                  * via OStatus (maybe Diasporsa as well)
 917                  */
 918                 $duplicate = self::getDuplicateID($item);
 919                 if ($duplicate) {
 920                         return $duplicate;
 921                 }
 922
 923                 // Additional duplicate checks
 924                 /// @todo Check why the first duplication check returns the item number and the second a 0
 925                 if (self::isDuplicate($item)) {
 926                         return 0;
 927                 }
 928
 929                 if (!isset($item['post-type'])) {
 930                         $item['post-type'] = empty($item['title']) ? self::PT_NOTE : self::PT_ARTICLE;
 931                 }
 932
 933                 $item['wall']          = intval($item['wall'] ?? 0);
 934                 $item['extid']         = trim($item['extid'] ?? '');
 935                 $item['author-name']   = trim($item['author-name'] ?? '');
 936                 $item['author-link']   = trim($item['author-link'] ?? '');
 937                 $item['author-avatar'] = trim($item['author-avatar'] ?? '');
 938                 $item['owner-name']    = trim($item['owner-name'] ?? '');
 939                 $item['owner-link']    = trim($item['owner-link'] ?? '');
 940                 $item['owner-avatar']  = trim($item['owner-avatar'] ?? '');
 941                 $item['received']      = (isset($item['received'])  ? DateTimeFormat::utc($item['received'])  : DateTimeFormat::utcNow());
 942                 $item['created']       = (isset($item['created'])   ? DateTimeFormat::utc($item['created'])   : $item['received']);
 943                 $item['edited']        = (isset($item['edited'])    ? DateTimeFormat::utc($item['edited'])    : $item['created']);
 944                 $item['changed']       = (isset($item['changed'])   ? DateTimeFormat::utc($item['changed'])   : $item['created']);
 945                 $item['commented']     = (isset($item['commented']) ? DateTimeFormat::utc($item['commented']) : $item['created']);
 946                 $item['title']         = substr(trim($item['title'] ?? ''), 0, 255);
 947                 $item['location']      = trim($item['location'] ?? '');
 948                 $item['coord']         = trim($item['coord'] ?? '');
 949                 $item['visible']       = (isset($item['visible']) ? intval($item['visible']) : 1);
 950                 $item['deleted']       = 0;
 951                 $item['verb']          = trim($item['verb'] ?? '');
 952                 $item['object-type']   = trim($item['object-type'] ?? '');
 953                 $item['object']        = trim($item['object'] ?? '');
 954                 $item['target-type']   = trim($item['target-type'] ?? '');
 955                 $item['target']        = trim($item['target'] ?? '');
 956                 $item['plink']         = substr(trim($item['plink'] ?? ''), 0, 255);
 957                 $item['allow_cid']     = trim($item['allow_cid'] ?? '');
 958                 $item['allow_gid']     = trim($item['allow_gid'] ?? '');
 959                 $item['deny_cid']      = trim($item['deny_cid'] ?? '');
 960                 $item['deny_gid']      = trim($item['deny_gid'] ?? '');
 961                 $item['private']       = intval($item['private'] ?? self::PUBLIC);
 962                 $item['body']          = trim($item['body'] ?? '');
 963                 $item['raw-body']      = trim($item['raw-body'] ?? $item['body']);
 964                 $item['app']           = trim($item['app'] ?? '');
 965                 $item['origin']        = intval($item['origin'] ?? 0);
 966                 $item['postopts']      = trim($item['postopts'] ?? '');
 967                 $item['resource-id']   = trim($item['resource-id'] ?? '');
 968                 $item['event-id']      = intval($item['event-id'] ?? 0);
 969                 $item['inform']        = trim($item['inform'] ?? '');
 970                 $item['file']          = trim($item['file'] ?? '');
 971
 972                 // Communities aren't working with the Diaspora protoccol
 973                 if (($uid != 0) && ($item['network'] == Protocol::DIASPORA)) {
 974                         $user = User::getById($uid, ['account-type']);
 975                         if ($user['account-type'] == Contact::TYPE_COMMUNITY) {
 976                                 Logger::info('Community posts are not supported via Diaspora');
 977                                 return 0;
 978                         }
 979                 }
 980
 981                 // Items cannot be stored before they happen ...
 982                 if ($item['created'] > DateTimeFormat::utcNow()) {
 983                         $item['created'] = DateTimeFormat::utcNow();
 984                 }
 985
 986                 // We haven't invented time travel by now.
 987                 if ($item['edited'] > DateTimeFormat::utcNow()) {
 988                         $item['edited'] = DateTimeFormat::utcNow();
 989                 }
 990
 991                 $item['plink'] = ($item['plink'] ?? '') ?: DI::baseUrl() . '/display/' . urlencode($item['guid']);
 992
 993                 $item['gravity'] = self::getGravity($item);
 994
 995                 $default = ['url' => $item['author-link'], 'name' => $item['author-name'],
 996                         'photo' => $item['author-avatar'], 'network' => $item['network']];
 997                 $item['author-id'] = ($item['author-id'] ?? 0) ?: Contact::getIdForURL($item['author-link'], 0, null, $default);
 998
 999                 $default = ['url' => $item['owner-link'], 'name' => $item['owner-name'],
1000                         'photo' => $item['owner-avatar'], 'network' => $item['network']];
1001                 $item['owner-id'] = ($item['owner-id'] ?? 0) ?: Contact::getIdForURL($item['owner-link'], 0, null, $default);
1002
1003                 $item['post-reason'] = self::getPostReason($item);
1004
1005                 // Ensure that there is an avatar cache
1006                 Contact::checkAvatarCache($item['author-id']);
1007                 Contact::checkAvatarCache($item['owner-id']);
1008
1009                 $item['contact-id'] = self::contactId($item);
1010
1011                 if (!empty($item['direction']) && in_array($item['direction'], [Conversation::PUSH, Conversation::RELAY]) &&
1012                         empty($item['origin']) && self::isTooOld($item)) {
1013                         Logger::info('Item is too old', ['item' => $item]);
1014                         return 0;
1015                 }
1016
1017                 if (!self::isValid($item)) {
1018                         return 0;
1019                 }
1020
1021                 if ($item['gravity'] !== self::GRAVITY_PARENT) {
1022                         $toplevel_parent = self::getTopLevelParent($item);
1023                         if (empty($toplevel_parent)) {
1024                                 return 0;
1025                         }
1026
1027                         // If the thread originated from this node, we check the permission against the thread starter
1028                         $condition = ['uri-id' => $toplevel_parent['uri-id'], 'wall' => true];
1029                         $localTopLevelParent = Post::selectFirst(['uid'], $condition);
1030                         if (!empty($localTopLevelParent['uid']) && !self::isAllowedByUser($item, $localTopLevelParent['uid'])) {
1031                                 return 0;
1032                         }
1033
1034                         $parent_id             = $toplevel_parent['id'];
1035                         $item['parent-uri']    = $toplevel_parent['uri'];
1036                         $item['parent-uri-id'] = $toplevel_parent['uri-id'];
1037                         $item['deleted']       = $toplevel_parent['deleted'];
1038                         $item['wall']          = $toplevel_parent['wall'];
1039
1040                         // Reshares have to keep their permissions to allow forums to work
1041                         if (!$item['origin'] || ($item['verb'] != Activity::ANNOUNCE)) {
1042                                 $item['allow_cid']     = $toplevel_parent['allow_cid'];
1043                                 $item['allow_gid']     = $toplevel_parent['allow_gid'];
1044                                 $item['deny_cid']      = $toplevel_parent['deny_cid'];
1045                                 $item['deny_gid']      = $toplevel_parent['deny_gid'];
1046                         }
1047
1048                         $parent_origin         = $toplevel_parent['origin'];
1049
1050                         // Don't federate received participation messages
1051                         if ($item['verb'] != Activity::FOLLOW) {
1052                                 $item['wall'] = $toplevel_parent['wall'];
1053                         } else {
1054                                 $item['wall'] = false;
1055                                 // Participations are technical messages, so they are set to "seen" automatically
1056                                 $item['unseen'] = false;
1057                         }
1058
1059                         /*
1060                          * If the parent is private, force privacy for the entire conversation
1061                          * This differs from the above settings as it subtly allows comments from
1062                          * email correspondents to be private even if the overall thread is not.
1063                          */
1064                         if ($toplevel_parent['private']) {
1065                                 $item['private'] = $toplevel_parent['private'];
1066                         }
1067
1068                         // If its a post that originated here then tag the thread as "mention"
1069                         if ($item['origin'] && $item['uid']) {
1070                                 DBA::update('post-thread-user', ['mention' => true], ['uri-id' => $item['parent-uri-id'], 'uid' => $item['uid']]);
1071                                 Logger::info('tagged thread as mention', ['parent' => $parent_id, 'parent-uri-id' => $item['parent-uri-id'], 'uid' => $item['uid']]);
1072                         }
1073
1074                         // Update the contact relations
1075                         Contact\Relation::store($toplevel_parent['author-id'], $item['author-id'], $item['created']);
1076                 } else {
1077                         $parent_id = 0;
1078                         $parent_origin = $item['origin'];
1079
1080                         if ($item['wall'] && empty($item['conversation'])) {
1081                                 $item['conversation'] = $item['parent-uri'] . '#context';
1082                         }
1083                 }
1084
1085                 $item['parent-uri-id'] = ItemURI::getIdByURI($item['parent-uri']);
1086                 $item['thr-parent-id'] = ItemURI::getIdByURI($item['thr-parent']);
1087
1088                 if (!empty($item['conversation']) && empty($item['conversation-id'])) {
1089                         $item['conversation-id'] = ItemURI::getIdByURI($item['conversation']);
1090                 }
1091
1092                 // Is this item available in the global items (with uid=0)?
1093                 if ($item['uid'] == 0) {
1094                         $item['global'] = true;
1095
1096                         // Set the global flag on all items if this was a global item entry
1097                         Post::update(['global' => true], ['uri-id' => $item['uri-id']]);
1098                 } else {
1099                         $item['global'] = Post::exists(['uid' => 0, 'uri-id' => $item['uri-id']]);
1100                 }
1101
1102                 // ACL settings
1103                 if (!empty($item['allow_cid'] . $item['allow_gid'] . $item['deny_cid'] . $item['deny_gid'])) {
1104                         $item['private'] = self::PRIVATE;
1105                 }
1106
1107                 if ($notify && $post_local) {
1108                         $item['edit'] = false;
1109                         $item['parent'] = $parent_id;
1110
1111                         // Trigger automatic reactions for addons
1112                         if (!isset($item['api_source'])) {
1113                                 $item['api_source'] = true;
1114                         }
1115
1116                         // We have to tell the hooks who we are - this really should be improved
1117                         if (!DI::userSession()->getLocalUserId()) {
1118                                 $_SESSION['authenticated'] = true;
1119                                 $_SESSION['uid'] = $uid;
1120                                 $dummy_session = true;
1121                         } else {
1122                                 $dummy_session = false;
1123                         }
1124
1125                         Hook::callAll('post_local', $item);
1126
1127                         if ($dummy_session) {
1128                                 unset($_SESSION['authenticated']);
1129                                 unset($_SESSION['uid']);
1130                         }
1131                 } elseif (!$notify) {
1132                         Hook::callAll('post_remote', $item);
1133                 }
1134
1135                 if (!empty($item['cancel'])) {
1136                         Logger::notice('post cancelled by addon.');
1137                         return 0;
1138                 }
1139
1140                 if (empty($item['vid']) && !empty($item['verb'])) {
1141                         $item['vid'] = Verb::getID($item['verb']);
1142                 }
1143
1144                 // Creates or assigns the permission set
1145                 $item['psid'] = DI::permissionSet()->selectOrCreate(
1146                         DI::permissionSetFactory()->createFromString(
1147                                 $item['uid'],
1148                                 $item['allow_cid'],
1149                                 $item['allow_gid'],
1150                                 $item['deny_cid'],
1151                                 $item['deny_gid']
1152                 ))->id;
1153
1154                 if (!empty($item['extid'])) {
1155                         $item['external-id'] = ItemURI::getIdByURI($item['extid']);
1156                 }
1157
1158                 if ($item['verb'] == Activity::ANNOUNCE) {
1159                         self::setOwnerforResharedItem($item);
1160                 }
1161
1162                 if (isset($item['attachments'])) {
1163                         foreach ($item['attachments'] as $attachment) {
1164                                 $attachment['uri-id'] = $item['uri-id'];
1165                                 Post\Media::insert($attachment);
1166                         }
1167                         unset($item['attachments']);
1168                 }
1169
1170                 if (empty($item['quote-uri-id'])) {
1171                         $quote_id = self::getQuoteUriId($item['body']);
1172                         if (!empty($quote_id)) {
1173                                 // This is one of these "should not happen" situations.
1174                                 // The protocol implementations should already have done this job.
1175                                 Logger::notice('Quote-uri-id detected in post', ['id' => $quote_id, 'guid' => $item['guid'], 'uri-id' => $item['uri-id'], 'callstack' => System::callstack(20)]);
1176                                 $item['quote-uri-id'] = $quote_id;
1177                         }
1178                 }
1179
1180                 if (!empty($item['quote-uri-id'])) {
1181                         $item['raw-body'] = BBCode::removeSharedData($item['raw-body']);
1182                         $item['body']     = BBCode::removeSharedData($item['body']);
1183                 }
1184
1185                 Post\Media::insertFromAttachmentData($item['uri-id'], $item['body']);
1186
1187                 // Remove all media attachments from the body and store them in the post-media table
1188                 $item['raw-body'] = Post\Media::insertFromBody($item['uri-id'], $item['raw-body']);
1189                 $item['raw-body'] = self::setHashtags($item['raw-body']);
1190
1191                 $author = Contact::getById($item['author-id'], ['network']);
1192                 Post\Media::insertFromRelevantUrl($item['uri-id'], $item['raw-body'], $item['body'], $author['network'] ?? '');
1193
1194                 // Check for hashtags in the body and repair or add hashtag links
1195                 $item['body'] = self::setHashtags($item['body']);
1196
1197                 $item['language'] = self::getLanguage($item);
1198
1199                 $notify_type = Delivery::POST;
1200
1201                 // Filling item related side tables
1202                 if (!empty($item['attach'])) {
1203                         Post\Media::insertFromAttachment($item['uri-id'], $item['attach']);
1204                 }
1205
1206                 if (empty($item['event-id'])) {
1207                         unset($item['event-id']);
1208
1209                         $ev = Event::fromBBCode($item['body']);
1210                         if ((!empty($ev['desc']) || !empty($ev['summary'])) && !empty($ev['start'])) {
1211                                 Logger::info('Event found.');
1212                                 $ev['cid']       = $item['contact-id'];
1213                                 $ev['uid']       = $item['uid'];
1214                                 $ev['uri']       = $item['uri'];
1215                                 $ev['edited']    = $item['edited'];
1216                                 $ev['private']   = $item['private'];
1217                                 $ev['guid']      = $item['guid'];
1218                                 $ev['plink']     = $item['plink'];
1219                                 $ev['network']   = $item['network'];
1220                                 $ev['protocol']  = $item['protocol'] ?? Conversation::PARCEL_UNKNOWN;
1221                                 $ev['direction'] = $item['direction'] ?? Conversation::UNKNOWN;
1222                                 $ev['source']    = $item['source'] ?? '';
1223
1224                                 $event = DBA::selectFirst('event', ['id'], ['uri' => $item['uri'], 'uid' => $item['uid']]);
1225                                 if (DBA::isResult($event)) {
1226                                         $ev['id'] = $event['id'];
1227                                 }
1228
1229                                 $event_id = Event::store($ev);
1230                                 $item = Event::getItemArrayForImportedId($event_id, $item);
1231
1232                                 Logger::info('Event was stored', ['id' => $event_id]);
1233                         }
1234                 }
1235
1236                 if (empty($item['causer-id'])) {
1237                         unset($item['causer-id']);
1238                 }
1239
1240                 if (in_array($item['network'], [Protocol::ACTIVITYPUB, Protocol::DFRN])) {
1241                         $content_warning = BBCode::getAbstract($item['body'], Protocol::ACTIVITYPUB);
1242                         if (!empty($content_warning) && empty($item['content-warning'])) {
1243                                 $item['content-warning'] = BBCode::toPlaintext($content_warning);
1244                         }
1245                 }
1246
1247                 Post::insert($item['uri-id'], $item);
1248
1249                 if ($item['gravity'] == self::GRAVITY_PARENT) {
1250                         Post\Thread::insert($item['uri-id'], $item);
1251                 }
1252
1253                 if (!in_array($item['verb'], self::ACTIVITIES)) {
1254                         Post\Content::insert($item['uri-id'], $item);
1255                 }
1256
1257                 // Create Diaspora signature
1258                 if ($item['origin'] && empty($item['diaspora_signed_text']) && ($item['gravity'] != self::GRAVITY_PARENT)) {
1259                         $signed = Diaspora::createCommentSignature($item);
1260                         if (!empty($signed)) {
1261                                 $item['diaspora_signed_text'] = json_encode($signed);
1262                         }
1263                 }
1264
1265                 if (!empty($item['diaspora_signed_text'])) {
1266                         DBA::replace('diaspora-interaction', ['uri-id' => $item['uri-id'], 'interaction' => $item['diaspora_signed_text']]);
1267                 }
1268
1269                 // Attached file links
1270                 if (!empty($item['file'])) {
1271                         Post\Category::storeTextByURIId($item['uri-id'], $item['uid'], $item['file']);
1272                 }
1273
1274                 // Delivery relevant data
1275                 $delivery_data = Post\DeliveryData::extractFields($item);
1276
1277                 if (!empty($item['origin']) || !empty($item['wall']) || !empty($delivery_data['postopts']) || !empty($delivery_data['inform'])) {
1278                         Post\DeliveryData::insert($item['uri-id'], $delivery_data);
1279                 }
1280
1281                 // Store tags from the body if this hadn't been handled previously in the protocol classes
1282                 if (!Tag::existsForPost($item['uri-id'])) {
1283                         Tag::storeFromBody($item['uri-id'], $item['body']);
1284                 }
1285
1286                 $condition = ['uri-id' => $item['uri-id'], 'uid' => $item['uid']];
1287                 if (Post::exists($condition)) {
1288                         Logger::notice('Item is already inserted - aborting', $condition);
1289                         return 0;
1290                 }
1291
1292                 $post_user_id = Post\User::insert($item['uri-id'], $item['uid'], $item);
1293                 if (!$post_user_id) {
1294                         Logger::notice('Post-User is already inserted - aborting', ['uid' => $item['uid'], 'uri-id' => $item['uri-id']]);
1295                         return 0;
1296                 }
1297
1298                 if ($item['gravity'] == self::GRAVITY_PARENT) {
1299                         $item['post-user-id'] = $post_user_id;
1300                         Post\ThreadUser::insert($item['uri-id'], $item['uid'], $item);
1301                 }
1302
1303                 Logger::notice('created item', ['post-id' => $post_user_id, 'uid' => $item['uid'], 'network' => $item['network'], 'uri-id' => $item['uri-id'], 'guid' => $item['guid']]);
1304
1305                 $posted_item = Post::selectFirst(self::ITEM_FIELDLIST, ['post-user-id' => $post_user_id]);
1306                 if (!DBA::isResult($posted_item)) {
1307                         // On failure store the data into a spool file so that the "SpoolPost" worker can try again later.
1308                         Logger::warning('Could not store item. it will be spooled', ['id' => $post_user_id]);
1309                         self::spool($orig_item);
1310                         return 0;
1311                 }
1312
1313                 // update the commented timestamp on the parent
1314                 if (DI::config()->get('system', 'like_no_comment')) {
1315                         // Update when it is a comment
1316                         $update_commented = in_array($posted_item['gravity'], [self::GRAVITY_PARENT, self::GRAVITY_COMMENT]);
1317                 } else {
1318                         // Update when it isn't a follow or tag verb
1319                         $update_commented = !in_array($posted_item['verb'], [Activity::FOLLOW, Activity::TAG]);
1320                 }
1321
1322                 if ($update_commented) {
1323                         $fields = ['commented' => DateTimeFormat::utcNow(), 'changed' => DateTimeFormat::utcNow()];
1324                 } else {
1325                         $fields = ['changed' => DateTimeFormat::utcNow()];
1326                 }
1327
1328                 Post::update($fields, ['uri-id' => $posted_item['parent-uri-id'], 'uid' => $posted_item['uid']]);
1329
1330                 // In that function we check if this is a forum post. Additionally we delete the item under certain circumstances
1331                 if (self::tagDeliver($posted_item['uid'], $post_user_id)) {
1332                         // Get the user information for the logging
1333                         $user = User::getById($uid);
1334
1335                         Logger::notice('Item had been deleted', ['id' => $post_user_id, 'user' => $uid, 'account-type' => $user['account-type']]);
1336                         return 0;
1337                 }
1338
1339                 if ($notify) {
1340                         if (!\Friendica\Content\Feature::isEnabled($posted_item['uid'], 'explicit_mentions') && ($posted_item['gravity'] == self::GRAVITY_COMMENT)) {
1341                                 Tag::createImplicitMentions($posted_item['uri-id'], $posted_item['thr-parent-id']);
1342                         }
1343                         Hook::callAll('post_local_end', $posted_item);
1344                 } else {
1345                         Hook::callAll('post_remote_end', $posted_item);
1346                 }
1347
1348                 if ($posted_item['gravity'] === self::GRAVITY_PARENT) {
1349                         self::addShadow($post_user_id);
1350                 } else {
1351                         self::addShadowPost($post_user_id);
1352                 }
1353
1354                 self::updateContact($posted_item);
1355
1356                 Post\UserNotification::setNotification($posted_item['uri-id'], $posted_item['uid']);
1357
1358                 // Distribute items to users who subscribed to their tags
1359                 self::distributeByTags($posted_item);
1360
1361                 // Automatically reshare the item if the "remote_self" option is selected
1362                 self::autoReshare($posted_item);
1363
1364                 $transmit = $notify || ($posted_item['visible'] && ($parent_origin || $posted_item['origin']));
1365
1366                 if ($transmit) {
1367                         // Don't relay participation messages
1368                         if (($posted_item['verb'] == Activity::FOLLOW) &&
1369                                 (!$posted_item['origin'] || ($posted_item['author-id'] != Contact::getPublicIdByUserId($uid)))) {
1370                                 Logger::info('Participation messages will not be relayed', ['item' => $posted_item['id'], 'uri' => $posted_item['uri'], 'verb' => $posted_item['verb']]);
1371                                 $transmit = false;
1372                         }
1373                 }
1374
1375                 if (!empty($source) && ($transmit || DI::config()->get('debug', 'store_source'))) {
1376                         Post\Activity::insert($item['uri-id'], $source);
1377                 }
1378
1379                 if ($transmit) {
1380                         Worker::add(['priority' => $priority, 'dont_fork' => true], 'Notifier', $notify_type, (int)$posted_item['uri-id'], (int)$posted_item['uid']);
1381                 }
1382
1383                 // Fill the cache with the rendered content.
1384                 if (in_array($posted_item['gravity'], [self::GRAVITY_PARENT, self::GRAVITY_COMMENT]) && ($posted_item['uid'] == 0)) {
1385                         self::updateDisplayCache($posted_item['uri-id']);
1386                 }
1387
1388                 return $post_user_id;
1389         }
1390
1391         /**
1392          * Fetch the post reason for a given item array
1393          *
1394          * @param array $item
1395          *
1396          * @return integer
1397          */
1398         public static function getPostReason(array $item): int
1399         {
1400                 $actor = ($item['gravity'] == self::GRAVITY_PARENT) ? $item['owner-id'] : $item['author-id'];
1401                 if (empty($item['origin']) && ($item['uid'] != 0) && Contact::isSharing($actor, $item['uid'])) {
1402                         return self::PR_FOLLOWER;
1403                 }
1404
1405                 if (!empty($item['origin']) && empty($item['post-reason'])) {
1406                         return self::PR_LOCAL;
1407                 }
1408
1409                 return $item['post-reason'] ?? self::PR_NONE;
1410         }
1411
1412         /**
1413          * Update the display cache
1414          *
1415          * @param integer $uri_id
1416          * @return void
1417          */
1418         public static function updateDisplayCache(int $uri_id)
1419         {
1420                 $item = Post::selectFirst(self::DISPLAY_FIELDLIST, ['uri-id' => $uri_id]);
1421                 self::prepareBody($item, false, false, true);
1422         }
1423
1424         /**
1425          * Change the owner of a parent item if it had been shared by a forum
1426          *
1427          * (public) forum posts in the new format consist of the regular post by the author
1428          * followed by an announce message sent from the forum account.
1429          * Changing the owner helps in grouping forum posts.
1430          *
1431          * @param array $item
1432          * @return void
1433          */
1434         private static function setOwnerforResharedItem(array $item)
1435         {
1436                 $parent = Post::selectFirst(['id', 'causer-id', 'owner-id', 'author-id', 'author-link', 'origin', 'post-reason'],
1437                         ['uri-id' => $item['thr-parent-id'], 'uid' => $item['uid']]);
1438                 if (!DBA::isResult($parent)) {
1439                         Logger::error('Parent not found', ['uri-id' => $item['thr-parent-id'], 'uid' => $item['uid']]);
1440                         return;
1441                 }
1442
1443                 $author = Contact::selectFirst(['url', 'contact-type', 'network'], ['id' => $item['author-id']]);
1444                 if (!DBA::isResult($author)) {
1445                         Logger::error('Author not found', ['id' => $item['author-id']]);
1446                         return;
1447                 }
1448
1449                 $self_contact = Contact::selectFirst(['id'], ['uid' => $item['uid'], 'self' => true]);
1450                 $self = !empty($self_contact) ? $self_contact['id'] : 0;
1451
1452                 $cid = Contact::getIdForURL($author['url'], $item['uid']);
1453                 if (empty($cid) || (!Contact::isSharing($cid, $item['uid']) && ($cid != $self))) {
1454                         Logger::info('The resharer is not a following contact: quit', ['resharer' => $author['url'], 'uid' => $item['uid'], 'cid' => $cid]);
1455                         return;
1456                 }
1457
1458                 if ($author['contact-type'] != Contact::TYPE_COMMUNITY) {
1459                         if ($parent['post-reason'] == self::PR_ANNOUNCEMENT) {
1460                                 Logger::info('The parent is already marked as announced: quit', ['causer' => $parent['causer-id'], 'owner' => $parent['owner-id'], 'author' => $parent['author-id'], 'uid' => $item['uid']]);
1461                                 return;
1462                         }
1463
1464                         if (Contact::isSharing($parent['owner-id'], $item['uid'])) {
1465                                 Logger::info('The resharer is no forum: quit', ['resharer' => $item['author-id'], 'owner' => $parent['owner-id'], 'author' => $parent['author-id'], 'uid' => $item['uid']]);
1466                                 return;
1467                         }
1468                 }
1469
1470                 self::update(['post-reason' => self::PR_ANNOUNCEMENT, 'causer-id' => $item['author-id']], ['id' => $parent['id']]);
1471                 Logger::info('Set announcement post-reason', ['uri-id' => $item['uri-id'], 'thr-parent-id' => $item['thr-parent-id'], 'uid' => $item['uid']]);
1472         }
1473
1474         /**
1475          * Distribute the given item to users who subscribed to their tags
1476          *
1477          * @param array $item     Processed item
1478          */
1479         private static function distributeByTags(array $item)
1480         {
1481                 if (($item['uid'] != 0) || ($item['gravity'] != self::GRAVITY_PARENT) || !in_array($item['network'], Protocol::FEDERATED)) {
1482                         return;
1483                 }
1484
1485                 $uids = Tag::getUIDListByURIId($item['uri-id']);
1486                 foreach ($uids as $uid) {
1487                         $stored = self::storeForUserByUriId($item['uri-id'], $uid, ['post-reason' => self::PR_TAG]);
1488                         Logger::info('Stored item for users', ['uri-id' => $item['uri-id'], 'uid' => $uid, 'stored' => $stored]);
1489                 }
1490         }
1491
1492         /**
1493          * Distributes public items to the receivers
1494          *
1495          * @param integer $itemid      Item ID that should be added
1496          * @param string  $signed_text Original text (for Diaspora signatures), JSON encoded.
1497          * @throws \Exception
1498          */
1499         public static function distribute(int $itemid, string $signed_text = '')
1500         {
1501                 $condition = ["`id` IN (SELECT `parent` FROM `post-user-view` WHERE `id` = ?)", $itemid];
1502                 $parent = Post::selectFirst(['owner-id'], $condition);
1503                 if (!DBA::isResult($parent)) {
1504                         Logger::warning('Item not found', ['condition' => $condition]);
1505                         return;
1506                 }
1507
1508                 // Only distribute public items from native networks
1509                 $condition = ['id' => $itemid, 'uid' => 0,
1510                         'network' => array_merge(Protocol::FEDERATED ,['']),
1511                         'visible' => true, 'deleted' => false, 'private' => [self::PUBLIC, self::UNLISTED]];
1512                 $item = Post::selectFirst(array_merge(self::ITEM_FIELDLIST, ['protocol']), $condition);
1513                 if (!DBA::isResult($item)) {
1514                         Logger::warning('Item not found', ['condition' => $condition]);
1515                         return;
1516                 }
1517
1518                 $origin = $item['origin'];
1519
1520                 $users = [];
1521
1522                 /// @todo add a field "pcid" in the contact table that referrs to the public contact id.
1523                 $owner = DBA::selectFirst('contact', ['url', 'nurl', 'alias'], ['id' => $parent['owner-id']]);
1524                 if (!DBA::isResult($owner)) {
1525                         return;
1526                 }
1527
1528                 $condition = ['nurl' => $owner['nurl'], 'rel' => [Contact::SHARING, Contact::FRIEND]];
1529                 $contacts = DBA::select('contact', ['uid'], $condition);
1530                 while ($contact = DBA::fetch($contacts)) {
1531                         if ($contact['uid'] == 0) {
1532                                 continue;
1533                         }
1534
1535                         $users[$contact['uid']] = $contact['uid'];
1536                 }
1537                 DBA::close($contacts);
1538
1539                 $condition = ['alias' => $owner['url'], 'rel' => [Contact::SHARING, Contact::FRIEND]];
1540                 $contacts = DBA::select('contact', ['uid'], $condition);
1541                 while ($contact = DBA::fetch($contacts)) {
1542                         if ($contact['uid'] == 0) {
1543                                 continue;
1544                         }
1545
1546                         $users[$contact['uid']] = $contact['uid'];
1547                 }
1548                 DBA::close($contacts);
1549
1550                 if (!empty($owner['alias'])) {
1551                         $condition = ['nurl' => Strings::normaliseLink($owner['alias']), 'rel' => [Contact::SHARING, Contact::FRIEND]];
1552                         $contacts = DBA::select('contact', ['uid'], $condition);
1553                         while ($contact = DBA::fetch($contacts)) {
1554                                 if ($contact['uid'] == 0) {
1555                                         continue;
1556                                 }
1557
1558                                 $users[$contact['uid']] = $contact['uid'];
1559                         }
1560                         DBA::close($contacts);
1561                 }
1562
1563                 $origin_uid = 0;
1564
1565                 if ($item['uri-id'] != $item['parent-uri-id']) {
1566                         $parents = Post::select(['uid', 'origin'], ["`uri-id` = ? AND `uid` != 0", $item['parent-uri-id']]);
1567                         while ($parent = Post::fetch($parents)) {
1568                                 $users[$parent['uid']] = $parent['uid'];
1569                                 if ($parent['origin'] && !$origin) {
1570                                         $origin_uid = $parent['uid'];
1571                                 }
1572                         }
1573                         DBA::close($parents);
1574                 }
1575
1576                 foreach ($users as $uid) {
1577                         if ($origin_uid == $uid) {
1578                                 $item['diaspora_signed_text'] = $signed_text;
1579                         }
1580                         $item['post-reason'] = self::PR_DISTRIBUTE;
1581                         self::storeForUser($item, $uid);
1582                 }
1583         }
1584
1585         /**
1586          * Store a public item defined by their URI-ID for the given users
1587          *
1588          * @param integer $uri_id     URI-ID of the given item
1589          * @param integer $uid        The user that will receive the item entry
1590          * @param array   $fields     Additional fields to be stored
1591          * @param integer $source_uid User id of the source post
1592          * @return integer stored item id
1593          */
1594         public static function storeForUserByUriId(int $uri_id, int $uid, array $fields = [], int $source_uid = 0): int
1595         {
1596                 if ($uid == $source_uid) {
1597                         Logger::warning('target UID must not be be equal to the source UID', ['uri-id' => $uri_id, 'uid' => $uid]);
1598                         return 0;
1599                 }
1600
1601                 $item = Post::selectFirst(array_merge(self::ITEM_FIELDLIST, ['protocol']), ['uri-id' => $uri_id, 'uid' => $source_uid]);
1602                 if (!DBA::isResult($item)) {
1603                         Logger::warning('Item could not be fetched', ['uri-id' => $uri_id, 'uid' => $source_uid]);
1604                         return 0;
1605                 }
1606
1607                 if (($uid != 0) && ($item['gravity'] == self::GRAVITY_PARENT)) {
1608                         $owner = User::getOwnerDataById($uid);
1609                         if (($owner['contact-type'] == User::ACCOUNT_TYPE_COMMUNITY) && !Tag::isMentioned($uri_id, $owner['url'])) {
1610                                 Logger::info('Target user is a forum but is not mentioned here, thread will not be stored', ['uid' => $uid, 'uri-id' => $uri_id]);
1611                                 return 0;
1612                         }
1613                 }
1614
1615                 if (($source_uid == 0) && (($item['private'] == self::PRIVATE) || !in_array($item['network'], Protocol::FEDERATED))) {
1616                         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']]);
1617                         return 0;
1618                 }
1619
1620                 $item['post-reason'] = self::PR_STORED;
1621
1622                 $item = array_merge($item, $fields);
1623
1624                 if (($uid != 0) && Contact::isSharing(($item['gravity'] == Item::GRAVITY_PARENT) ? $item['owner-id'] : $item['author-id'], $uid)) {
1625                         $item['post-reason'] = self::PR_FOLLOWER;
1626                 }
1627
1628                 $is_reshare = ($item['gravity'] == self::GRAVITY_ACTIVITY) && ($item['verb'] == Activity::ANNOUNCE);
1629
1630                 if (($uid != 0) && (($item['gravity'] == self::GRAVITY_PARENT) || $is_reshare) &&
1631                         DI::pConfig()->get($uid, 'system', 'accept_only_sharer') == self::COMPLETION_NONE &&
1632                         !in_array($item['post-reason'], [self::PR_FOLLOWER, self::PR_TAG, self::PR_TO, self::PR_CC, self::PR_ACTIVITY])) {
1633                         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']]);
1634                         return 0;
1635                 }
1636
1637                 $causer = $item['causer-id'] ?: $item['author-id'];
1638
1639                 if (($uri_id != $item['parent-uri-id']) && ($item['gravity'] == self::GRAVITY_COMMENT) && !Post::exists(['uri-id' => $item['parent-uri-id'], 'uid' => $uid])) {
1640                         if (!self::fetchParent($item['parent-uri-id'], $uid, $causer)) {
1641                                 Logger::info('Parent post had not been added', ['uri-id' => $item['parent-uri-id'], 'uid' => $uid, 'causer' => $causer]);
1642                                 return 0;
1643                         }
1644                         Logger::info('Fetched parent post', ['uri-id' => $item['parent-uri-id'], 'uid' => $uid, 'causer' => $causer]);
1645                 } elseif (($uri_id != $item['thr-parent-id']) && $is_reshare && !Post::exists(['uri-id' => $item['thr-parent-id'], 'uid' => $uid])) {
1646                         if (!self::fetchParent($item['thr-parent-id'], $uid, $causer)) {
1647                                 Logger::info('Thread parent had not been added', ['uri-id' => $item['thr-parent-id'], 'uid' => $uid, 'causer' => $causer]);
1648                                 return 0;
1649                         }
1650                         Logger::info('Fetched thread parent', ['uri-id' => $item['thr-parent-id'], 'uid' => $uid, 'causer' => $causer]);
1651                 }
1652
1653                 $stored = self::storeForUser($item, $uid);
1654                 Logger::info('Item stored for user', ['uri-id' => $item['uri-id'], 'uid' => $uid, 'causer' => $causer, 'source-uid' => $source_uid, 'stored' => $stored]);
1655                 return $stored;
1656         }
1657
1658         /**
1659          * Fetch the parent with the given uri-id
1660          *
1661          * @param integer $uri_id
1662          * @param integer $uid
1663          * @param integer $causer
1664          *
1665          * @return integer
1666          */
1667         private static function fetchParent(int $uri_id, int $uid, int $causer): int
1668         {
1669                 // Fetch the origin user for the post
1670                 $origin_uid = self::GetOriginUidForUriId($uri_id, $uid);
1671                 if (is_null($origin_uid)) {
1672                         Logger::info('Origin item was not found', ['uid' => $uid, 'uri-id' => $uri_id]);
1673                         return 0;
1674                 }
1675
1676                 return self::storeForUserByUriId($uri_id, $uid, ['causer-id' => $causer, 'post-reason' => self::PR_FETCHED], $origin_uid);
1677         }
1678
1679         /**
1680          * Returns the origin uid of a post if the given user is allowed to see it.
1681          *
1682          * @param int $uriid
1683          * @param int $uid
1684          * @return int
1685          */
1686         private static function GetOriginUidForUriId(int $uriid, int $uid)
1687         {
1688                 if (Post::exists(['uri-id' => $uriid, 'uid' => $uid])) {
1689                         return $uid;
1690                 }
1691
1692                 $post = Post::selectFirst(['uid', 'allow_cid', 'allow_gid', 'deny_cid', 'deny_gid', 'private'], ['uri-id' => $uriid, 'origin' => true]);
1693                 if (!empty($post)) {
1694                         if (in_array($post['private'], [Item::PUBLIC, Item::UNLISTED])) {
1695                                 return $post['uid'];
1696                         }
1697
1698                         $pcid = Contact::getPublicIdByUserId($uid);
1699                         if (empty($pcid)) {
1700                                 return null;
1701                         }
1702
1703                         foreach (Item::enumeratePermissions($post, true) as $receiver) {
1704                                 if ($receiver == $pcid) {
1705                                         return $post['uid'];
1706                                 }
1707                         }
1708
1709                         return null;
1710                 }
1711
1712                 if (Post::exists(['uri-id' => $uriid, 'uid' => 0])) {
1713                         return 0;
1714                 }
1715
1716                 // When the post belongs to a a forum then all forum users are allowed to access it
1717                 foreach (Tag::getByURIId($uriid, [Tag::MENTION, Tag::EXCLUSIVE_MENTION]) as $tag) {
1718                         if (DBA::exists('contact', ['uid' => $uid, 'nurl' => Strings::normaliseLink($tag['url']), 'contact-type' => Contact::TYPE_COMMUNITY])) {
1719                                 $target_uid = User::getIdForURL($tag['url']);
1720                                 if (!empty($target_uid)) {
1721                                         return $target_uid;
1722                                 }
1723                         }
1724                 }
1725
1726                 return null;
1727         }
1728
1729         /**
1730          * Store a public item array for the given users
1731          *
1732          * @param array   $item   The item entry that will be stored
1733          * @param integer $uid    The user that will receive the item entry
1734          * @return integer stored item id
1735          * @throws \Exception
1736          */
1737         private static function storeForUser(array $item, int $uid): int
1738         {
1739                 $post = Post::selectFirst(['id'], ['uri-id' => $item['uri-id'], 'uid' => $uid]);
1740                 if (!empty($post['id'])) {
1741                         if (!empty($item['event-id'])) {
1742                                 $event_post = Post::selectFirst(['event-id'], ['uri-id' => $item['uri-id'], 'uid' => $uid]);
1743                                 if (!empty($event_post['event-id'])) {
1744                                         $event = DBA::selectFirst('event', ['edited', 'start', 'finish', 'summary', 'desc', 'location', 'nofinish', 'adjust'], ['id' => $item['event-id']]);
1745                                         if (!empty($event)) {
1746                                                 // We aren't using "Event::store" here, since we don't want to trigger any further action
1747                                                 $ret = DBA::update('event', $event, ['id' => $event_post['event-id']]);
1748                                                 Logger::info('Event updated', ['uid' => $uid, 'source-event' => $item['event-id'], 'target-event' => $event_post['event-id'], 'ret' => $ret]);
1749                                         }
1750                                 }
1751                         }
1752                         Logger::info('Item already exists', ['uri-id' => $item['uri-id'], 'uid' => $uid, 'id' => $post['id']]);
1753                         return $post['id'];
1754                 }
1755
1756                 // Data from the "post-user" table
1757                 unset($item['id']);
1758                 unset($item['mention']);
1759                 unset($item['starred']);
1760                 unset($item['unseen']);
1761                 unset($item['psid']);
1762                 unset($item['pinned']);
1763                 unset($item['ignored']);
1764                 unset($item['pubmail']);
1765                 unset($item['event-id']);
1766                 unset($item['hidden']);
1767                 unset($item['notification-type']);
1768
1769                 // Data from the "post-delivery-data" table
1770                 unset($item['postopts']);
1771                 unset($item['inform']);
1772
1773                 $item['uid'] = $uid;
1774                 $item['origin'] = 0;
1775                 $item['wall'] = 0;
1776
1777                 $item['contact-id'] = self::contactId($item);
1778
1779                 $notify = false;
1780                 if ($item['gravity'] == self::GRAVITY_PARENT) {
1781                         $contact = DBA::selectFirst('contact', [], ['id' => $item['contact-id'], 'self' => false]);
1782                         if (DBA::isResult($contact)) {
1783                                 $notify = self::isRemoteSelf($contact, $item);
1784                         }
1785                 }
1786
1787                 $distributed = self::insert($item, $notify);
1788
1789                 if (!$distributed) {
1790                         Logger::info("Distributed item wasn't stored", ['uri-id' => $item['uri-id'], 'user' => $uid]);
1791                 } else {
1792                         Logger::info('Distributed item was stored', ['uri-id' => $item['uri-id'], 'user' => $uid, 'stored' => $distributed]);
1793                 }
1794                 return $distributed;
1795         }
1796
1797         /**
1798          * Add a shadow entry for a given item id that is a thread starter
1799          *
1800          * We store every public item entry additionally with the user id "0".
1801          * This is used for the community page and for the search.
1802          * It is planned that in the future we will store public item entries only once.
1803          *
1804          * @param integer $itemid Item ID that should be added
1805          * @throws \Exception
1806          */
1807         private static function addShadow(int $itemid)
1808         {
1809                 $fields = ['uid', 'private', 'visible', 'deleted', 'network', 'uri-id'];
1810                 $condition = ['id' => $itemid, 'gravity' => self::GRAVITY_PARENT];
1811                 $item = Post::selectFirst($fields, $condition);
1812
1813                 if (!DBA::isResult($item)) {
1814                         return;
1815                 }
1816
1817                 // is it already a copy?
1818                 if (($itemid == 0) || ($item['uid'] == 0)) {
1819                         return;
1820                 }
1821
1822                 // Is it a visible public post?
1823                 if (!$item["visible"] || $item["deleted"]  || ($item["private"] == self::PRIVATE)) {
1824                         return;
1825                 }
1826
1827                 // is it an entry from a connector? Only add an entry for natively connected networks
1828                 if (!in_array($item["network"], array_merge(Protocol::FEDERATED ,['']))) {
1829                         return;
1830                 }
1831
1832                 if (Post::exists(['uri-id' => $item['uri-id'], 'uid' => 0])) {
1833                         return;
1834                 }
1835
1836                 $item = Post::selectFirst(array_merge(self::ITEM_FIELDLIST, ['protocol']), ['id' => $itemid]);
1837
1838                 if (DBA::isResult($item)) {
1839                         // Preparing public shadow (removing user specific data)
1840                         $item['uid'] = 0;
1841                         unset($item['id']);
1842                         unset($item['parent']);
1843                         unset($item['wall']);
1844                         unset($item['mention']);
1845                         unset($item['origin']);
1846                         unset($item['starred']);
1847                         unset($item['postopts']);
1848                         unset($item['inform']);
1849                         unset($item['post-reason']);
1850                         if ($item['uri-id'] == $item['parent-uri-id']) {
1851                                 $item['contact-id'] = $item['owner-id'];
1852                         } else {
1853                                 $item['contact-id'] = $item['author-id'];
1854                         }
1855
1856                         $public_shadow = self::insert($item);
1857
1858                         Logger::info('Stored public shadow', ['thread' => $itemid, 'id' => $public_shadow]);
1859                 }
1860         }
1861
1862         /**
1863          * Add a shadow entry for a given item id that is a comment
1864          *
1865          * This function does the same like the function above - but for comments
1866          *
1867          * @param integer $itemid Item ID that should be added
1868          * @throws \Exception
1869          */
1870         private static function addShadowPost(int $itemid)
1871         {
1872                 $item = Post::selectFirst(array_merge(self::ITEM_FIELDLIST, ['protocol']), ['id' => $itemid]);
1873                 if (!DBA::isResult($item)) {
1874                         return;
1875                 }
1876
1877                 // Is it a toplevel post?
1878                 if ($item['gravity'] == self::GRAVITY_PARENT) {
1879                         self::addShadow($itemid);
1880                         return;
1881                 }
1882
1883                 // Is this a shadow entry?
1884                 if ($item['uid'] == 0) {
1885                         return;
1886                 }
1887
1888                 // Is there a shadow parent?
1889                 if (!Post::exists(['uri-id' => $item['parent-uri-id'], 'uid' => 0])) {
1890                         return;
1891                 }
1892
1893                 // Is there already a shadow entry?
1894                 if (Post::exists(['uri-id' => $item['uri-id'], 'uid' => 0])) {
1895                         return;
1896                 }
1897
1898                 // Save "origin" and "parent" state
1899                 $origin = $item['origin'];
1900                 $parent = $item['parent'];
1901
1902                 // Preparing public shadow (removing user specific data)
1903                 $item['uid'] = 0;
1904                 unset($item['id']);
1905                 unset($item['parent']);
1906                 unset($item['wall']);
1907                 unset($item['mention']);
1908                 unset($item['origin']);
1909                 unset($item['starred']);
1910                 unset($item['postopts']);
1911                 unset($item['inform']);
1912                 unset($item['post-reason']);
1913                 $item['contact-id'] = Contact::getIdForURL($item['author-link']);
1914
1915                 $public_shadow = self::insert($item);
1916
1917                 Logger::info('Stored public shadow', ['uri-id' => $item['uri-id'], 'id' => $public_shadow]);
1918
1919                 // If this was a comment to a Diaspora post we don't get our comment back.
1920                 // This means that we have to distribute the comment by ourselves.
1921                 if ($origin && Post::exists(['id' => $parent, 'network' => Protocol::DIASPORA])) {
1922                         self::distribute($public_shadow);
1923                 }
1924         }
1925
1926         /**
1927          * Adds a language specification in a "language" element of given $arr.
1928          * Expects "body" element to exist in $arr.
1929          *
1930          * @param array $item
1931          * @return string detected language
1932          * @throws \Text_LanguageDetect_Exception
1933          */
1934         private static function getLanguage(array $item): string
1935         {
1936                 if (!empty($item['language'])) {
1937                         return $item['language'];
1938                 }
1939
1940                 if (!in_array($item['gravity'], [self::GRAVITY_PARENT, self::GRAVITY_COMMENT]) || empty($item['body'])) {
1941                         return '';
1942                 }
1943
1944                 $languages = self::getLanguageArray(trim($item['title'] . "\n" . $item['body']), 3);
1945                 if (empty($languages)) {
1946                         return '';
1947                 }
1948
1949                 return json_encode($languages);
1950         }
1951
1952         /**
1953          * Get a language array from a given text
1954          *
1955          * @param string  $body
1956          * @param integer $count
1957          * @return array
1958          */
1959         public static function getLanguageArray(string $body, int $count): array
1960         {
1961                 // Convert attachments to links
1962                 $naked_body = BBCode::removeAttachment($body);
1963                 if (empty($naked_body)) {
1964                         return [];
1965                 }
1966
1967                 // Remove links and pictures
1968                 $naked_body = BBCode::removeLinks($naked_body);
1969
1970                 // Convert the title and the body to plain text
1971                 $naked_body = BBCode::toPlaintext($naked_body);
1972
1973                 // Remove possibly remaining links
1974                 $naked_body = preg_replace(Strings::autoLinkRegEx(), '', $naked_body);
1975
1976                 if (empty($naked_body)) {
1977                         return [];
1978                 }
1979
1980                 $naked_body = self::getDominantLanguage($naked_body);
1981
1982                 $availableLanguages = DI::l10n()->getAvailableLanguages();
1983                 // See https://github.com/friendica/friendica/issues/10511
1984                 // Persian is manually added to language detection until a persian translation is provided for the interface, at
1985                 // which point it will be automatically available through `getAvailableLanguages()` and this should be removed.
1986                 $availableLanguages['fa'] = 'fa';
1987
1988                 $ld = new Language(array_keys($availableLanguages));
1989                 return $ld->detect($naked_body)->limit(0, $count)->close() ?: [];
1990         }
1991
1992         /**
1993          * Check if latin or non latin are dominant in the body and only return the dominant one
1994          *
1995          * @param string $body
1996          * @return string
1997          */
1998         private static function getDominantLanguage(string $body): string
1999         {
2000                 $latin = '';
2001                 $non_latin = '';
2002                 for ($i = 0; $i < mb_strlen($body); $i++) {
2003                         $character = mb_substr($body, $i, 1);
2004                         $ord = mb_ord($character);
2005
2006                         // We add the most common characters to both strings.
2007                         if (($ord <= 64) || ($ord >= 91 && $ord <= 96) || ($ord >= 123 && $ord <= 191) || in_array($ord, [215, 247]) || ($ord >= 697 && $ord <= 735) || ($ord > 65535)) {
2008                                 $latin .= $character;
2009                                 $non_latin .= $character;
2010                         } elseif ($ord < 768) {
2011                                 $latin .= $character;
2012                         } else {
2013                                 $non_latin .= $character;
2014                         }
2015                 }
2016                 return (mb_strlen($latin) > mb_strlen($non_latin)) ? $latin : $non_latin;
2017         }
2018
2019         public static function getLanguageMessage(array $item): string
2020         {
2021                 $iso639 = new \Matriphe\ISO639\ISO639;
2022
2023                 $used_languages = '';
2024                 foreach (json_decode($item['language'], true) as $language => $reliability) {
2025                         $used_languages .= $iso639->languageByCode1($language) . ' (' . $language . "): " . number_format($reliability, 5) . '\n';
2026                 }
2027                 $used_languages = DI::l10n()->t('Detected languages in this post:\n%s', $used_languages);
2028                 return $used_languages;
2029         }
2030
2031         /**
2032          * Creates an unique guid out of a given uri.
2033          * This function is used for messages outside the fediverse (Connector posts, feeds, Mails, ...)
2034          * Posts that are created on this system are using System::createUUID.
2035          * Received ActivityPub posts are using Processor::getGUIDByURL.
2036          *
2037          * @param string      $uri  uri of an item entry
2038          * @param string|null $host hostname for the GUID prefix
2039          * @return string Unique guid
2040          * @throws \Exception
2041          */
2042         public static function guidFromUri(string $uri, string $host = null): string
2043         {
2044                 // Our regular guid routine is using this kind of prefix as well
2045                 // We have to avoid that different routines could accidentally create the same value
2046                 $parsed = parse_url($uri);
2047
2048                 // Remove the scheme to make sure that "https" and "http" doesn't make a difference
2049                 unset($parsed['scheme']);
2050
2051                 $hostPart = $host ?? $parsed['host'] ?? '';
2052                 if (!$hostPart) {
2053                         Logger::warning('Empty host GUID part', ['uri' => $uri, 'host' => $host, 'parsed' => $parsed, 'callstack' => System::callstack(10)]);
2054                 }
2055
2056                 // Glue it together to be able to make a hash from it
2057                 $host_id = implode('/', $parsed);
2058
2059                 // Use a mixture of several hashes to provide some GUID like experience
2060                 return hash('crc32', $hostPart) . '-' . hash('joaat', $host_id) . '-' . hash('fnv164', $host_id);
2061         }
2062
2063         /**
2064          * generate an unique URI
2065          *
2066          * @param string $guid An existing GUID (Otherwise it will be generated)
2067          *
2068          * @return string
2069          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
2070          */
2071         public static function newURI(string $guid = ''): string
2072         {
2073                 if ($guid == '') {
2074                         $guid = System::createUUID();
2075                 }
2076
2077                 return DI::baseUrl()->get() . '/objects/' . $guid;
2078         }
2079
2080         /**
2081          * Set "success_update" and "last-item" to the date of the last time we heard from this contact
2082          *
2083          * This can be used to filter for inactive contacts.
2084          * Only do this for public postings to avoid privacy problems, since poco data is public.
2085          * Don't set this value if it isn't from the owner (could be an author that we don't know)
2086          *
2087          * @param array $arr Contains the just posted item record
2088          * @throws \Exception
2089          */
2090         private static function updateContact(array $arr)
2091         {
2092                 // Unarchive the author
2093                 $contact = DBA::selectFirst('contact', [], ['id' => $arr["author-id"]]);
2094                 if (DBA::isResult($contact)) {
2095                         Contact::unmarkForArchival($contact);
2096                 }
2097
2098                 // Unarchive the contact if it's not our own contact
2099                 $contact = DBA::selectFirst('contact', [], ['id' => $arr["contact-id"], 'self' => false]);
2100                 if (DBA::isResult($contact)) {
2101                         Contact::unmarkForArchival($contact);
2102                 }
2103
2104                 /// @todo On private posts we could obfuscate the date
2105                 $update = ($arr['private'] != self::PRIVATE) || in_array($arr['network'], Protocol::FEDERATED);
2106
2107                 // Is it a forum? Then we don't care about the rules from above
2108                 if (!$update && in_array($arr["network"], [Protocol::ACTIVITYPUB, Protocol::DFRN]) && ($arr["parent-uri-id"] === $arr["uri-id"])) {
2109                         if (DBA::exists('contact', ['id' => $arr['contact-id'], 'forum' => true])) {
2110                                 $update = true;
2111                         }
2112                 }
2113
2114                 if ($update) {
2115                         // The "self" contact id is used (for example in the connectors) when the contact is unknown
2116                         // So we have to ensure to only update the last item when it had been our own post,
2117                         // or it had been done by a "regular" contact.
2118                         if (!empty($arr['wall'])) {
2119                                 $condition = ['id' => $arr['contact-id']];
2120                         } else {
2121                                 $condition = ['id' => $arr['contact-id'], 'self' => false];
2122                         }
2123                         Contact::update(['failed' => false, 'local-data' => true, 'success_update' => $arr['received'], 'last-item' => $arr['received']], $condition);
2124                 }
2125                 // Now do the same for the system wide contacts with uid=0
2126                 if ($arr['private'] != self::PRIVATE) {
2127                         Contact::update(['failed' => false, 'local-data' => true, 'success_update' => $arr['received'], 'last-item' => $arr['received']],
2128                                 ['id' => $arr['owner-id']]);
2129
2130                         if ($arr['owner-id'] != $arr['author-id']) {
2131                                 Contact::update(['failed' => false, 'local-data' => true, 'success_update' => $arr['received'], 'last-item' => $arr['received']],
2132                                         ['id' => $arr['author-id']]);
2133                         }
2134                 }
2135         }
2136
2137         public static function setHashtags(string $body): string
2138         {
2139                 $body = BBCode::performWithEscapedTags($body, ['noparse', 'pre', 'code', 'img'], function ($body) {
2140                         $tags = BBCode::getTags($body);
2141
2142                         // No hashtags?
2143                         if (!count($tags)) {
2144                                 return $body;
2145                         }
2146
2147                         // This sorting is important when there are hashtags that are part of other hashtags
2148                         // Otherwise there could be problems with hashtags like #test and #test2
2149                         // Because of this we are sorting from the longest to the shortest tag.
2150                         usort($tags, function ($a, $b) {
2151                                 return strlen($b) <=> strlen($a);
2152                         });
2153
2154                         $URLSearchString = "^\[\]";
2155
2156                         // All hashtags should point to the home server if "local_tags" is activated
2157                         if (DI::config()->get('system', 'local_tags')) {
2158                                 $body = preg_replace("/#\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",
2159                                         "#[url=" . DI::baseUrl() . "/search?tag=$2]$2[/url]", $body);
2160                         }
2161
2162                         // mask hashtags inside of url, bookmarks and attachments to avoid urls in urls
2163                         $body = preg_replace_callback("/\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",
2164                                 function ($match) {
2165                                         return ("[url=" . str_replace("#", "&num;", $match[1]) . "]" . str_replace("#", "&num;", $match[2]) . "[/url]");
2166                                 }, $body);
2167
2168                         $body = preg_replace_callback("/\[bookmark\=([$URLSearchString]*)\](.*?)\[\/bookmark\]/ism",
2169                                 function ($match) {
2170                                         return ("[bookmark=" . str_replace("#", "&num;", $match[1]) . "]" . str_replace("#", "&num;", $match[2]) . "[/bookmark]");
2171                                 }, $body);
2172
2173                         $body = preg_replace_callback("/\[attachment (.*?)\](.*?)\[\/attachment\]/ism",
2174                                 function ($match) {
2175                                         return ("[attachment " . str_replace("#", "&num;", $match[1]) . "]" . $match[2] . "[/attachment]");
2176                                 }, $body);
2177
2178                         // Repair recursive urls
2179                         $body = preg_replace("/&num;\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",
2180                                 "&num;$2", $body);
2181
2182                         foreach ($tags as $tag) {
2183                                 if ((strpos($tag, '#') !== 0) || strpos($tag, '[url=') || strlen($tag) < 2 || $tag[1] == '#') {
2184                                         continue;
2185                                 }
2186
2187                                 $basetag = str_replace('_', ' ', substr($tag, 1));
2188                                 $newtag = '#[url=' . DI::baseUrl() . '/search?tag=' . $basetag . ']' . $basetag . '[/url]';
2189
2190                                 $body = str_replace($tag, $newtag, $body);
2191                         }
2192
2193                         // Convert back the masked hashtags
2194                         $body = str_replace("&num;", "#", $body);
2195
2196                         return $body;
2197                 });
2198
2199                 return $body;
2200         }
2201
2202         /**
2203          * look for mention tags and setup a second delivery chain for forum/community posts if appropriate
2204          *
2205          * @param int $uid
2206          * @param int $item_id
2207          * @return boolean true if item was deleted, else false
2208          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
2209          * @throws \ImagickException
2210          */
2211         private static function tagDeliver(int $uid, int $item_id): bool
2212         {
2213                 $mention = false;
2214
2215                 $owner = User::getOwnerDataById($uid);
2216                 if (!DBA::isResult($owner)) {
2217                         Logger::warning('User not found, quitting here.', ['uid' => $uid]);
2218                         return false;
2219                 }
2220
2221                 if ($owner['contact-type'] != User::ACCOUNT_TYPE_COMMUNITY) {
2222                         Logger::debug('Owner is no community, quitting here.', ['uid' => $uid, 'id' => $item_id]);
2223                         return false;
2224                 }
2225
2226                 $item = Post::selectFirst(self::ITEM_FIELDLIST, ['id' => $item_id, 'gravity' => [self::GRAVITY_PARENT, self::GRAVITY_COMMENT], 'origin' => false]);
2227                 if (!DBA::isResult($item)) {
2228                         Logger::debug('Post is an activity or origin or not found at all, quitting here.', ['id' => $item_id]);
2229                         return false;
2230                 }
2231
2232                 if ($item['gravity'] == self::GRAVITY_PARENT) {
2233                         if (Tag::isMentioned($item['uri-id'], $owner['url'])) {
2234                                 Logger::info('Mention found in tag.', ['uri' => $item['uri'], 'uid' => $uid, 'id' => $item_id, 'uri-id' => $item['uri-id'], 'guid' => $item['guid']]);
2235                         } else {
2236                                 Logger::info('Top-level post without mention is deleted.', ['uri' => $item['uri'], $uid, 'id' => $item_id, 'uri-id' => $item['uri-id'], 'guid' => $item['guid']]);
2237                                 Post\User::delete(['uri-id' => $item['uri-id'], 'uid' => $item['uid']]);
2238                                 return true;
2239                         }
2240
2241                         $arr = ['item' => $item, 'user' => $owner];
2242
2243                         Hook::callAll('tagged', $arr);
2244                 } else {
2245                         if (Tag::isMentioned($item['parent-uri-id'], $owner['url'])) {
2246                                 Logger::info('Mention found in parent tag.', ['uri' => $item['uri'], 'uid' => $uid, 'id' => $item_id, 'uri-id' => $item['uri-id'], 'guid' => $item['guid']]);
2247                         } else {
2248                                 Logger::debug('No mentions found in parent, quitting here.', ['id' => $item_id, 'uri-id' => $item['uri-id'], 'guid' => $item['guid']]);
2249                                 return false;
2250                         }
2251                 }
2252
2253                 Logger::info('Community post will be distributed', ['uri' => $item['uri'], 'uid' => $uid, 'id' => $item_id, 'uri-id' => $item['uri-id'], 'guid' => $item['guid']]);
2254
2255                 if ($owner['page-flags'] == User::PAGE_FLAGS_PRVGROUP) {
2256                         $allow_cid = '';
2257                         $allow_gid = '<' . Group::FOLLOWERS . '>';
2258                         $deny_cid  = '';
2259                         $deny_gid  = '';
2260                         self::performActivity($item['id'], 'announce', $uid, $allow_cid, $allow_gid, $deny_cid, $deny_gid);
2261                 } else {
2262                         self::performActivity($item['id'], 'announce', $uid);
2263                 }
2264
2265                 Logger::info('Community post had been distributed', ['uri' => $item['uri'], 'uid' => $uid, 'id' => $item_id, 'uri-id' => $item['uri-id'], 'guid' => $item['guid']]);
2266                 return false;
2267         }
2268
2269         /**
2270          * Automatically reshare the item if the "remote_self" option is selected
2271          *
2272          * @param array $item
2273          * @return void
2274          */
2275         private static function autoReshare(array $item)
2276         {
2277                 if ($item['gravity'] != self::GRAVITY_PARENT) {
2278                         return;
2279                 }
2280
2281                 $cdata = Contact::getPublicAndUserContactID($item['author-id'], $item['uid']);
2282                 if (empty($cdata['user']) || ($cdata['user'] != $item['contact-id'])) {
2283                         return;
2284                 }
2285
2286                 if (!DBA::exists('contact', ['id' => $item['contact-id'], 'remote_self' => Contact::MIRROR_NATIVE_RESHARE])) {
2287                         return;
2288                 }
2289
2290                 if (!in_array($item['network'], [Protocol::ACTIVITYPUB, Protocol::DFRN])) {
2291                         return;
2292                 }
2293
2294                 Logger::info('Automatically reshare item', ['uid' => $item['uid'], 'id' => $item['id'], 'guid' => $item['guid'], 'uri-id' => $item['uri-id']]);
2295
2296                 self::performActivity($item['id'], 'announce', $item['uid']);
2297         }
2298
2299         public static function isRemoteSelf(array $contact, array &$datarray): bool
2300         {
2301                 if ($contact['remote_self'] != Contact::MIRROR_OWN_POST) {
2302                         return false;
2303                 }
2304
2305                 // Prevent the forwarding of posts that are forwarded
2306                 if (!empty($datarray['extid']) && ($datarray['extid'] == Protocol::DFRN)) {
2307                         Logger::info('Already forwarded');
2308                         return false;
2309                 }
2310
2311                 // Prevent to forward already forwarded posts
2312                 if ($datarray['app'] == DI::baseUrl()->getHostname()) {
2313                         Logger::info('Already forwarded (second test)');
2314                         return false;
2315                 }
2316
2317                 // Only forward posts
2318                 if ($datarray['verb'] != Activity::POST) {
2319                         Logger::info('No post');
2320                         return false;
2321                 }
2322
2323                 if (($contact['network'] != Protocol::FEED) && ($datarray['private'] == self::PRIVATE)) {
2324                         Logger::info('Not public');
2325                         return false;
2326                 }
2327
2328                 $datarray2 = $datarray;
2329                 Logger::info('remote-self start', ['contact' => $contact['url'], 'remote_self'=> $contact['remote_self'], 'item' => $datarray]);
2330
2331                 $self = DBA::selectFirst('contact', ['id', 'name', 'url', 'thumb'],
2332                                         ['uid' => $contact['uid'], 'self' => true]);
2333                 if (!DBA::isResult($self)) {
2334                         Logger::error('Self contact not found', ['uid' => $contact['uid']]);
2335                         return false;
2336                 }
2337
2338                 $datarray['contact-id'] = $self['id'];
2339
2340                 $datarray['author-name']   = $datarray['owner-name']   = $self['name'];
2341                 $datarray['author-link']   = $datarray['owner-link']   = $self['url'];
2342                 $datarray['author-avatar'] = $datarray['owner-avatar'] = $self['thumb'];
2343
2344                 unset($datarray['edited']);
2345
2346                 unset($datarray['network']);
2347                 unset($datarray['owner-id']);
2348                 unset($datarray['author-id']);
2349
2350                 if ($contact['network'] != Protocol::FEED) {
2351                         $old_uri_id = $datarray['uri-id'] ?? 0;
2352                         $datarray['guid'] = System::createUUID();
2353                         unset($datarray['plink']);
2354                         $datarray['uri'] = self::newURI($datarray['guid']);
2355                         $datarray['uri-id'] = ItemURI::getIdByURI($datarray['uri']);
2356                         $datarray['extid'] = Protocol::DFRN;
2357                         $urlpart = parse_url($datarray2['author-link']);
2358                         $datarray['app'] = $urlpart['host'];
2359                         if (!empty($old_uri_id)) {
2360                                 Post\Media::copy($old_uri_id, $datarray['uri-id']);
2361                         }
2362
2363                         unset($datarray['parent-uri']);
2364                         unset($datarray['thr-parent']);
2365
2366                         // Store the original post
2367                         $result = self::insert($datarray2);
2368                         Logger::info('remote-self post original item', ['contact' => $contact['url'], 'result'=> $result, 'item' => $datarray2]);
2369                 } else {
2370                         $datarray['private'] = self::PUBLIC;
2371                         $datarray['app'] = 'Feed';
2372                         $result = true;
2373                 }
2374
2375                 return (bool)$result;
2376         }
2377
2378         /**
2379          *
2380          * @param string $s
2381          * @param int    $uid
2382          * @param array  $item
2383          * @param int    $cid
2384          * @return string
2385          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
2386          * @throws \ImagickException
2387          */
2388         public static function fixPrivatePhotos(string $s, int $uid, array $item = null, int $cid = 0): string
2389         {
2390                 if (DI::config()->get('system', 'disable_embedded')) {
2391                         return $s;
2392                 }
2393
2394                 Logger::info('check for photos');
2395                 $site = substr(DI::baseUrl(), strpos(DI::baseUrl(), '://'));
2396
2397                 $orig_body = $s;
2398                 $new_body = '';
2399
2400                 $img_start = strpos($orig_body, '[img');
2401                 $img_st_close = ($img_start !== false ? strpos(substr($orig_body, $img_start), ']') : false);
2402                 $img_len = ($img_start !== false ? strpos(substr($orig_body, $img_start + $img_st_close + 1), '[/img]') : false);
2403
2404                 while (($img_st_close !== false) && ($img_len !== false)) {
2405                         $img_st_close++; // make it point to AFTER the closing bracket
2406                         $image = substr($orig_body, $img_start + $img_st_close, $img_len);
2407
2408                         Logger::info('found photo', ['image' => $image]);
2409
2410                         if (stristr($image, $site . '/photo/')) {
2411                                 // Only embed locally hosted photos
2412                                 $replace = false;
2413                                 $i = basename($image);
2414                                 $i = str_replace(['.jpg', '.png', '.gif'], ['', '', ''], $i);
2415                                 $x = strpos($i, '-');
2416
2417                                 if ($x) {
2418                                         $res = substr($i, $x + 1);
2419                                         $i = substr($i, 0, $x);
2420                                         $photo = Photo::getPhotoForUser($uid, $i, $res);
2421                                         if (DBA::isResult($photo)) {
2422                                                 /*
2423                                                  * Check to see if we should replace this photo link with an embedded image
2424                                                  * 1. No need to do so if the photo is public
2425                                                  * 2. If there's a contact-id provided, see if they're in the access list
2426                                                  *    for the photo. If so, embed it.
2427                                                  * 3. Otherwise, if we have an item, see if the item permissions match the photo
2428                                                  *    permissions, regardless of order but first check to see if they're an exact
2429                                                  *    match to save some processing overhead.
2430                                                  */
2431                                                 if (self::hasPermissions($photo)) {
2432                                                         if ($cid) {
2433                                                                 $recips = self::enumeratePermissions($photo);
2434                                                                 if (in_array($cid, $recips)) {
2435                                                                         $replace = true;
2436                                                                 }
2437                                                         } elseif ($item) {
2438                                                                 if (self::samePermissions($uid, $item, $photo)) {
2439                                                                         $replace = true;
2440                                                                 }
2441                                                         }
2442                                                 }
2443                                                 if ($replace) {
2444                                                         $photo_img = Photo::getImageForPhoto($photo);
2445                                                         // If a custom width and height were specified, apply before embedding
2446                                                         if (preg_match("/\[img\=([0-9]*)x([0-9]*)\]/is", substr($orig_body, $img_start, $img_st_close), $match)) {
2447                                                                 Logger::info('scaling photo');
2448
2449                                                                 $width = intval($match[1]);
2450                                                                 $height = intval($match[2]);
2451
2452                                                                 $photo_img->scaleDown(max($width, $height));
2453                                                         }
2454
2455                                                         $data = $photo_img->asString();
2456                                                         $type = $photo_img->getType();
2457
2458                                                         Logger::info('replacing photo');
2459                                                         $image = 'data:' . $type . ';base64,' . base64_encode($data);
2460                                                         Logger::debug('replaced', ['image' => $image]);
2461                                                 }
2462                                         }
2463                                 }
2464                         }
2465
2466                         $new_body = $new_body . substr($orig_body, 0, $img_start + $img_st_close) . $image . '[/img]';
2467                         $orig_body = substr($orig_body, $img_start + $img_st_close + $img_len + strlen('[/img]'));
2468                         if ($orig_body === false) {
2469                                 $orig_body = '';
2470                         }
2471
2472                         $img_start = strpos($orig_body, '[img');
2473                         $img_st_close = ($img_start !== false ? strpos(substr($orig_body, $img_start), ']') : false);
2474                         $img_len = ($img_start !== false ? strpos(substr($orig_body, $img_start + $img_st_close + 1), '[/img]') : false);
2475                 }
2476
2477                 $new_body = $new_body . $orig_body;
2478
2479                 return $new_body;
2480         }
2481
2482         private static function hasPermissions(array $obj)
2483         {
2484                 return !empty($obj['allow_cid']) || !empty($obj['allow_gid']) ||
2485                         !empty($obj['deny_cid']) || !empty($obj['deny_gid']);
2486         }
2487
2488         // @TODO $uid is unused parameter
2489         private static function samePermissions($uid, array $obj1, array $obj2): bool
2490         {
2491                 // first part is easy. Check that these are exactly the same.
2492                 if (($obj1['allow_cid'] == $obj2['allow_cid'])
2493                         && ($obj1['allow_gid'] == $obj2['allow_gid'])
2494                         && ($obj1['deny_cid'] == $obj2['deny_cid'])
2495                         && ($obj1['deny_gid'] == $obj2['deny_gid'])) {
2496                         return true;
2497                 }
2498
2499                 // This is harder. Parse all the permissions and compare the resulting set.
2500                 $recipients1 = self::enumeratePermissions($obj1);
2501                 $recipients2 = self::enumeratePermissions($obj2);
2502                 sort($recipients1);
2503                 sort($recipients2);
2504
2505                 /// @TODO Comparison of arrays, maybe use array_diff_assoc() here?
2506                 return ($recipients1 == $recipients2);
2507         }
2508
2509         /**
2510          * Returns an array of contact-ids that are allowed to see this object
2511          *
2512          * @param array $obj        Item array with at least uid, allow_cid, allow_gid, deny_cid and deny_gid
2513          * @param bool  $check_dead Prunes unavailable contacts from the result
2514          * @return array
2515          * @throws \Exception
2516          */
2517         public static function enumeratePermissions(array $obj, bool $check_dead = false): array
2518         {
2519                 $aclFormater = DI::aclFormatter();
2520
2521                 $allow_people = $aclFormater->expand($obj['allow_cid']);
2522                 $allow_groups = Group::expand($obj['uid'], $aclFormater->expand($obj['allow_gid']), $check_dead);
2523                 $deny_people  = $aclFormater->expand($obj['deny_cid']);
2524                 $deny_groups  = Group::expand($obj['uid'], $aclFormater->expand($obj['deny_gid']), $check_dead);
2525                 $recipients   = array_unique(array_merge($allow_people, $allow_groups));
2526                 $deny         = array_unique(array_merge($deny_people, $deny_groups));
2527                 $recipients   = array_diff($recipients, $deny);
2528                 return $recipients;
2529         }
2530
2531         public static function expire(int $uid, int $days, string $network = "", bool $force = false)
2532         {
2533                 if (!$uid || ($days < 1)) {
2534                         return;
2535                 }
2536
2537                 $condition = ["`uid` = ? AND NOT `deleted` AND `gravity` = ?",
2538                         $uid, self::GRAVITY_PARENT];
2539
2540                 /*
2541                  * $expire_network_only = save your own wall posts
2542                  * and just expire conversations started by others
2543                  */
2544                 $expire_network_only = DI::pConfig()->get($uid, 'expire', 'network_only', false);
2545
2546                 if ($expire_network_only) {
2547                         $condition[0] .= " AND NOT `wall`";
2548                 }
2549
2550                 if ($network != "") {
2551                         $condition[0] .= " AND `network` = ?";
2552                         $condition[] = $network;
2553                 }
2554
2555                 $condition[0] .= " AND `received` < ?";
2556                 $condition[] = DateTimeFormat::utc('now - ' . $days . ' day');
2557
2558                 $items = Post::select(['resource-id', 'starred', 'id', 'post-type', 'uid', 'uri-id'], $condition);
2559
2560                 if (!DBA::isResult($items)) {
2561                         return;
2562                 }
2563
2564                 $expire_items = (bool)DI::pConfig()->get($uid, 'expire', 'items', true);
2565
2566                 // Forcing expiring of items - but not notes and marked items
2567                 if ($force) {
2568                         $expire_items = true;
2569                 }
2570
2571                 $expire_notes = (bool)DI::pConfig()->get($uid, 'expire', 'notes', true);
2572                 $expire_starred = (bool)DI::pConfig()->get($uid, 'expire', 'starred', true);
2573                 $expire_photos = (bool)DI::pConfig()->get($uid, 'expire', 'photos', false);
2574
2575                 $expired = 0;
2576
2577                 $priority = DI::config()->get('system', 'expire-notify-priority');
2578
2579                 while ($item = Post::fetch($items)) {
2580                         // don't expire filed items
2581                         if (DBA::exists('post-category', ['uri-id' => $item['uri-id'], 'uid' => $item['uid'], 'type' => Post\Category::FILE])) {
2582                                 continue;
2583                         }
2584
2585                         // Only expire posts, not photos and photo comments
2586
2587                         if (!$expire_photos && !empty($item['resource-id'])) {
2588                                 continue;
2589                         } elseif (!$expire_starred && intval($item['starred'])) {
2590                                 continue;
2591                         } elseif (!$expire_notes && ($item['post-type'] == self::PT_PERSONAL_NOTE)) {
2592                                 continue;
2593                         } elseif (!$expire_items && ($item['post-type'] != self::PT_PERSONAL_NOTE)) {
2594                                 continue;
2595                         }
2596
2597                         self::markForDeletionById($item['id'], $priority);
2598
2599                         ++$expired;
2600                 }
2601                 DBA::close($items);
2602                 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]);
2603         }
2604
2605         public static function firstPostDate(int $uid, bool $wall = false)
2606         {
2607                 $user = User::getById($uid, ['register_date']);
2608                 if (empty($user)) {
2609                         return false;
2610                 }
2611
2612                 $condition = ["`uid` = ? AND `wall` = ? AND NOT `deleted` AND `visible` AND `received` >= ?",
2613                         $uid, $wall, $user['register_date']];
2614                 $params = ['order' => ['received' => false]];
2615                 $thread = Post::selectFirstThread(['received'], $condition, $params);
2616                 if (DBA::isResult($thread)) {
2617                         $postdate = substr(DateTimeFormat::local($thread['received']), 0, 10);
2618                         return $postdate;
2619                 }
2620                 return false;
2621         }
2622
2623         /**
2624          * add/remove activity to an item
2625          *
2626          * Toggle activities as like,dislike,attend of an item
2627          *
2628          * @param int    $item_id
2629          * @param string $verb
2630          *            Activity verb. One of
2631          *            like, unlike, dislike, undislike, attendyes, unattendyes,
2632          *            attendno, unattendno, attendmaybe, unattendmaybe,
2633          *            announce, unannouce
2634          * @param int    $uid
2635          * @param string $allow_cid
2636          * @param string $allow_gid
2637          * @param string $deny_cid
2638          * @param string $deny_gid
2639          * @return bool
2640          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
2641          * @throws \ImagickException
2642          * @hook  'post_local_end'
2643          *            array $arr
2644          *            'post_id' => ID of posted item
2645          */
2646         public static function performActivity(int $item_id, string $verb, int $uid, string $allow_cid = null, string $allow_gid = null, string $deny_cid = null, string $deny_gid = null): bool
2647         {
2648                 if (empty($uid)) {
2649                         return false;
2650                 }
2651
2652                 Logger::notice('Start create activity', ['verb' => $verb, 'item' => $item_id, 'user' => $uid]);
2653
2654                 $item = Post::selectFirst(self::ITEM_FIELDLIST, ['id' => $item_id]);
2655                 if (!DBA::isResult($item)) {
2656                         Logger::warning('Post had not been fetched', ['id' => $item_id]);
2657                         return false;
2658                 }
2659
2660                 $uri_id = $item['uri-id'];
2661
2662                 if (!in_array($item['uid'], [0, $uid])) {
2663                         return false;
2664                 }
2665
2666                 if (!Post::exists(['uri-id' => $item['parent-uri-id'], 'uid' => $uid])) {
2667                         $stored = self::storeForUserByUriId($item['parent-uri-id'], $uid, ['post-reason' => Item::PR_ACTIVITY]);
2668                         if (($item['parent-uri-id'] == $item['uri-id']) && !empty($stored)) {
2669                                 $item = Post::selectFirst(self::ITEM_FIELDLIST, ['id' => $stored]);
2670                                 if (!DBA::isResult($item)) {
2671                                         Logger::info('Could not fetch just created item - should not happen', ['stored' => $stored, 'uid' => $uid, 'uri-id' => $uri_id]);
2672                                         return false;
2673                                 }
2674                         }
2675                 }
2676
2677                 // Retrieves the local post owner
2678                 $owner = User::getOwnerDataById($uid);
2679                 if (empty($owner)) {
2680                         Logger::info('Empty owner for user', ['uid' => $uid]);
2681                         return false;
2682                 }
2683
2684                 // Retrieve the current logged in user's public contact
2685                 $author_id = Contact::getPublicIdByUserId($uid);
2686                 if (empty($author_id)) {
2687                         Logger::info('Empty public contact');
2688                         return false;
2689                 }
2690
2691                 $activity = null;
2692                 switch ($verb) {
2693                         case 'like':
2694                         case 'unlike':
2695                                 $activity = Activity::LIKE;
2696                                 break;
2697                         case 'dislike':
2698                         case 'undislike':
2699                                 $activity = Activity::DISLIKE;
2700                                 break;
2701                         case 'attendyes':
2702                         case 'unattendyes':
2703                                 $activity = Activity::ATTEND;
2704                                 break;
2705                         case 'attendno':
2706                         case 'unattendno':
2707                                 $activity = Activity::ATTENDNO;
2708                                 break;
2709                         case 'attendmaybe':
2710                         case 'unattendmaybe':
2711                                 $activity = Activity::ATTENDMAYBE;
2712                                 break;
2713                         case 'follow':
2714                         case 'unfollow':
2715                                 $activity = Activity::FOLLOW;
2716                                 break;
2717                         case 'announce':
2718                         case 'unannounce':
2719                                 $activity = Activity::ANNOUNCE;
2720                                 break;
2721                         default:
2722                                 Logger::warning('unknown verb', ['verb' => $verb, 'item' => $item_id]);
2723                                 return false;
2724                 }
2725
2726                 $mode = Strings::startsWith($verb, 'un') ? 'delete' : 'create';
2727
2728                 // Enable activity toggling instead of on/off
2729                 $event_verb_flag = $activity === Activity::ATTEND || $activity === Activity::ATTENDNO || $activity === Activity::ATTENDMAYBE;
2730
2731                 // Look for an existing verb row
2732                 // Event participation activities are mutually exclusive, only one of them can exist at all times.
2733                 if ($event_verb_flag) {
2734                         $verbs = [Activity::ATTEND, Activity::ATTENDNO, Activity::ATTENDMAYBE];
2735
2736                         // Translate to the index based activity index
2737                         $vids = [];
2738                         foreach ($verbs as $verb) {
2739                                 $vids[] = Verb::getID($verb);
2740                         }
2741                 } else {
2742                         $vids = Verb::getID($activity);
2743                 }
2744
2745                 $condition = ['vid' => $vids, 'deleted' => false, 'gravity' => self::GRAVITY_ACTIVITY,
2746                         'author-id' => $author_id, 'uid' => $uid, 'thr-parent-id' => $uri_id];
2747                 $like_item = Post::selectFirst(['id', 'guid', 'verb'], $condition);
2748
2749                 if (DBA::isResult($like_item)) {
2750                         /**
2751                          * Truth table for existing activities
2752                          *
2753                          * |          Inputs            ||      Outputs      |
2754                          * |----------------------------||-------------------|
2755                          * |  Mode  | Event | Same verb || Delete? | Return? |
2756                          * |--------|-------|-----------||---------|---------|
2757                          * | create |  Yes  |    Yes    ||   No    |   Yes   |
2758                          * | create |  Yes  |    No     ||   Yes   |   No    |
2759                          * | create |  No   |    Yes    ||   No    |   Yes   |
2760                          * | create |  No   |    No     ||        N/A†       |
2761                          * | delete |  Yes  |    Yes    ||   Yes   |   N/A‡  |
2762                          * | delete |  Yes  |    No     ||   No    |   N/A‡  |
2763                          * | delete |  No   |    Yes    ||   Yes   |   N/A‡  |
2764                          * | delete |  No   |    No     ||        N/A†       |
2765                          * |--------|-------|-----------||---------|---------|
2766                          * |   A    |   B   |     C     || A xor C | !B or C |
2767                          *
2768                          * † Can't happen: It's impossible to find an existing non-event activity without
2769                          *                 the same verb because we are only looking for this single verb.
2770                          *
2771                          * ‡ The "mode = delete" is returning early whether an existing activity was found or not.
2772                          */
2773                         if ($mode == 'create' xor $like_item['verb'] == $activity) {
2774                                 self::markForDeletionById($like_item['id']);
2775                         }
2776
2777                         if (!$event_verb_flag || $like_item['verb'] == $activity) {
2778                                 return true;
2779                         }
2780                 }
2781
2782                 // No need to go further if we aren't creating anything
2783                 if ($mode == 'delete') {
2784                         return true;
2785                 }
2786
2787                 $objtype = $item['resource-id'] ? Activity\ObjectType::IMAGE : Activity\ObjectType::NOTE;
2788
2789                 $new_item = [
2790                         'guid'          => System::createUUID(),
2791                         'uri'           => self::newURI(),
2792                         'uid'           => $uid,
2793                         'contact-id'    => $owner['id'],
2794                         'wall'          => $item['wall'],
2795                         'origin'        => 1,
2796                         'network'       => Protocol::DFRN,
2797                         'protocol'      => Conversation::PARCEL_DIRECT,
2798                         'direction'     => Conversation::PUSH,
2799                         'gravity'       => self::GRAVITY_ACTIVITY,
2800                         'parent'        => $item['id'],
2801                         'thr-parent'    => $item['uri'],
2802                         'owner-id'      => $author_id,
2803                         'author-id'     => $author_id,
2804                         'body'          => $activity,
2805                         'verb'          => $activity,
2806                         'object-type'   => $objtype,
2807                         'allow_cid'     => $allow_cid ?? $item['allow_cid'],
2808                         'allow_gid'     => $allow_gid ?? $item['allow_gid'],
2809                         'deny_cid'      => $deny_cid ?? $item['deny_cid'],
2810                         'deny_gid'      => $deny_gid ?? $item['deny_gid'],
2811                         'visible'       => 1,
2812                         'unseen'        => 1,
2813                 ];
2814
2815                 if (in_array($activity, [Activity::LIKE, Activity::DISLIKE])) {
2816                         $signed = Diaspora::createLikeSignature($uid, $new_item);
2817                         if (!empty($signed)) {
2818                                 $new_item['diaspora_signed_text'] = json_encode($signed);
2819                         }
2820                 }
2821
2822                 self::insert($new_item, true);
2823
2824                 // If the parent item isn't visible then set it to visible
2825                 // @todo Check if this is still needed
2826                 if (!$item['visible']) {
2827                         self::update(['visible' => true], ['id' => $item['id']]);
2828                 }
2829                 return true;
2830         }
2831
2832         /**
2833          * Fetch the SQL condition for the given user id
2834          *
2835          * @param integer $owner_id User ID for which the permissions should be fetched
2836          * @return array condition
2837          */
2838         public static function getPermissionsConditionArrayByUserId(int $owner_id): array
2839         {
2840                 $local_user = DI::userSession()->getLocalUserId();
2841                 $remote_user = DI::userSession()->getRemoteContactID($owner_id);
2842
2843                 // default permissions - anonymous user
2844                 $condition = ["`private` != ?", self::PRIVATE];
2845
2846                 if ($local_user && ($local_user == $owner_id)) {
2847                         // Profile owner - everything is visible
2848                         $condition = [];
2849                 } elseif ($remote_user) {
2850                          // Authenticated visitor - fetch the matching permissionsets
2851                         $permissionSets = DI::permissionSet()->selectByContactId($remote_user, $owner_id);
2852                         if (!empty($set)) {
2853                                 $condition = ["(`private` != ? OR (`private` = ? AND `wall`
2854                                         AND `psid` IN (" . implode(', ', array_fill(0, count($set), '?')) . ")))",
2855                                         self::PRIVATE, self::PRIVATE];
2856                                 $condition = array_merge($condition, $permissionSets->column('id'));
2857                         }
2858                 }
2859
2860                 return $condition;
2861         }
2862
2863         /**
2864          * Get a permission SQL string for the given user
2865          *
2866          * @param int $owner_id
2867          * @param string $table
2868          * @return string
2869          */
2870         public static function getPermissionsSQLByUserId(int $owner_id, string $table = ''): string
2871         {
2872                 $local_user = DI::userSession()->getLocalUserId();
2873                 $remote_user = DI::userSession()->getRemoteContactID($owner_id);
2874
2875                 if (!empty($table)) {
2876                         $table = DBA::quoteIdentifier($table) . '.';
2877                 }
2878
2879                 /*
2880                  * Construct permissions
2881                  *
2882                  * default permissions - anonymous user
2883                  */
2884                 $sql = sprintf(" AND " . $table . "`private` != %d", self::PRIVATE);
2885
2886                 // Profile owner - everything is visible
2887                 if ($local_user && ($local_user == $owner_id)) {
2888                         $sql = '';
2889                 } elseif ($remote_user) {
2890                         /*
2891                          * Authenticated visitor. Unless pre-verified,
2892                          * check that the contact belongs to this $owner_id
2893                          * and load the groups the visitor belongs to.
2894                          * If pre-verified, the caller is expected to have already
2895                          * done this and passed the groups into this function.
2896                          */
2897                         $permissionSets = DI::permissionSet()->selectByContactId($remote_user, $owner_id);
2898
2899                         if (!empty($set)) {
2900                                 $sql_set = sprintf(" OR (" . $table . "`private` = %d AND " . $table . "`wall` AND " . $table . "`psid` IN (", self::PRIVATE) . implode(',', $permissionSets->column('id')) . "))";
2901                         } else {
2902                                 $sql_set = '';
2903                         }
2904
2905                         $sql = sprintf(" AND (" . $table . "`private` != %d", self::PRIVATE) . $sql_set . ")";
2906                 }
2907
2908                 return $sql;
2909         }
2910
2911         /**
2912          * get translated item type
2913          *
2914          * @param array                $item
2915          * @param \Friendica\Core\L10n $l10n
2916          * @return string
2917          */
2918         public static function postType(array $item, \Friendica\Core\L10n $l10n): string
2919         {
2920                 if (!empty($item['event-id'])) {
2921                         return $l10n->t('event');
2922                 } elseif (!empty($item['resource-id'])) {
2923                         return $l10n->t('photo');
2924                 } elseif ($item['gravity'] == self::GRAVITY_ACTIVITY) {
2925                         return $l10n->t('activity');
2926                 } elseif ($item['gravity'] == self::GRAVITY_COMMENT) {
2927                         return $l10n->t('comment');
2928                 }
2929
2930                 return $l10n->t('post');
2931         }
2932
2933         /**
2934          * Sets the "rendered-html" field of the provided item
2935          *
2936          * Body is preserved to avoid side-effects as we modify it just-in-time for spoilers and private image links
2937          *
2938          * @param array $item
2939          *
2940          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
2941          * @todo Remove reference, simply return "rendered-html" and "rendered-hash"
2942          */
2943         private static function putInCache(&$item)
2944         {
2945                 // Save original body to prevent addons to modify it
2946                 $body = $item['body'];
2947
2948                 $rendered_hash = $item['rendered-hash'] ?? '';
2949                 $rendered_html = $item['rendered-html'] ?? '';
2950
2951                 if ($rendered_hash == ''
2952                         || $rendered_html == ''
2953                         || $rendered_hash != hash('md5', BBCode::VERSION . '::' . $body)
2954                         || DI::config()->get('system', 'ignore_cache')
2955                 ) {
2956                         $item['rendered-html'] = BBCode::convertForUriId($item['uri-id'], $item['body']);
2957                         $item['rendered-hash'] = hash('md5', BBCode::VERSION . '::' . $body);
2958
2959                         $hook_data = ['item' => $item, 'rendered-html' => $item['rendered-html'], 'rendered-hash' => $item['rendered-hash']];
2960                         Hook::callAll('put_item_in_cache', $hook_data);
2961                         $item['rendered-html'] = $hook_data['rendered-html'];
2962                         $item['rendered-hash'] = $hook_data['rendered-hash'];
2963                         unset($hook_data);
2964
2965                         // Update if the generated values differ from the existing ones
2966                         if ((($rendered_hash != $item['rendered-hash']) || ($rendered_html != $item['rendered-html'])) && !empty($item['id'])) {
2967                                 self::update(
2968                                         [
2969                                                 'rendered-html' => $item['rendered-html'],
2970                                                 'rendered-hash' => $item['rendered-hash']
2971                                         ],
2972                                         ['id' => $item['id']]
2973                                 );
2974                         }
2975                 }
2976
2977                 $item['body'] = $body;
2978         }
2979
2980         /**
2981          * Given an item array, convert the body element from bbcode to html and add smilie icons.
2982          * If attach is true, also add icons for item attachments.
2983          *
2984          * @param array   $item Record from item table
2985          * @param boolean $attach If true, add icons for item attachments as well
2986          * @param boolean $is_preview Whether this is a preview
2987          * @param boolean $only_cache Whether only cached HTML should be updated
2988          * @return string item body html
2989          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
2990          * @throws \ImagickException
2991          * @hook  prepare_body_init item array before any work
2992          * @hook  prepare_body_content_filter ('item'=>item array, 'filter_reasons'=>string array) before first bbcode to html
2993          * @hook  prepare_body ('item'=>item array, 'html'=>body string, 'is_preview'=>boolean, 'filter_reasons'=>string array) after first bbcode to html
2994          * @hook  prepare_body_final ('item'=>item array, 'html'=>body string) after attach icons and blockquote special case handling (spoiler, author)
2995          */
2996         public static function prepareBody(array &$item, bool $attach = false, bool $is_preview = false, bool $only_cache = false): string
2997         {
2998                 $a = DI::app();
2999                 Hook::callAll('prepare_body_init', $item);
3000
3001                 // In order to provide theme developers more possibilities, event items
3002                 // are treated differently.
3003                 if ($item['object-type'] === Activity\ObjectType::EVENT && isset($item['event-id'])) {
3004                         $ev = Event::getItemHTML($item);
3005                         return $ev;
3006                 }
3007
3008                 $tags = Tag::populateFromItem($item);
3009
3010                 $item['tags'] = $tags['tags'];
3011                 $item['hashtags'] = $tags['hashtags'];
3012                 $item['mentions'] = $tags['mentions'];
3013
3014                 $body = $item['body'] = Post\Media::removeFromEndOfBody($item['body'] ?? '');
3015
3016                 $fields = ['uri-id', 'uri', 'body', 'title', 'author-name', 'author-link', 'author-avatar', 'guid', 'created', 'plink', 'network', 'has-media', 'quote-uri-id', 'post-type'];
3017
3018                 $shared_uri_id = 0;
3019                 $shared_links  = [];
3020
3021                 $shared = DI::contentItem()->getSharedPost($item, $fields);
3022                 if (!empty($shared['post'])) {
3023                         $shared_item  = $shared['post'];
3024                         $quote_uri_id = $shared['post']['uri-id'];
3025                         $shared_links[] = strtolower($shared['post']['uri']);
3026                         $item['body'] = BBCode::removeSharedData($item['body']);
3027                 } elseif (empty($shared_item['uri-id']) && empty($item['quote-uri-id']) && ($item['network'] != Protocol::DIASPORA)) {
3028                         $media = Post\Media::getByURIId($item['uri-id'], [Post\Media::ACTIVITY]);
3029                         if (!empty($media)) {
3030                                 $shared_item = Post::selectFirst($fields, ['plink' => $media[0]['url'], 'uid' => [$item['uid'], 0]]);
3031
3032                                 if (empty($shared_item['uri-id'])) {
3033                                         $shared_item = Post::selectFirst($fields, ['uri' => $media[0]['url'], 'uid' => [$item['uid'], 0]]);
3034                                         $shared_links[] = strtolower($media[0]['url']);
3035                                 }
3036
3037                                 $quote_uri_id = $shared_item['uri-id'] ?? 0;
3038                         }
3039                 }
3040
3041                 if (!empty($quote_uri_id)) {
3042                         $item['body'] .= "\n" . DI::contentItem()->createSharedBlockByArray($shared_item);
3043                 }
3044
3045                 if (!empty($shared_item['uri-id'])) {
3046                         $shared_uri_id = $shared_item['uri-id'];
3047                         $shared_links[] = strtolower($shared_item['plink']);
3048                         $shared_attachments = Post\Media::splitAttachments($shared_uri_id, [], $shared_item['has-media']);
3049                         $shared_links = array_merge($shared_links, array_column($shared_attachments['visual'], 'url'));
3050                         $shared_links = array_merge($shared_links, array_column($shared_attachments['link'], 'url'));
3051                         $shared_links = array_merge($shared_links, array_column($shared_attachments['additional'], 'url'));
3052                         $item['body'] = self::replaceVisualAttachments($shared_attachments, $item['body']);
3053                 }
3054
3055                 $attachments = Post\Media::splitAttachments($item['uri-id'], $shared_links, $item['has-media'] ?? false);
3056                 $item['body'] = self::replaceVisualAttachments($attachments, $item['body'] ?? '');
3057
3058                 $item['body'] = preg_replace("/\s*\[attachment .*?\].*?\[\/attachment\]\s*/ism", "\n", $item['body']);
3059                 self::putInCache($item);
3060                 $item['body'] = $body;
3061                 $s = $item["rendered-html"];
3062
3063                 if ($only_cache) {
3064                         return '';
3065                 }
3066
3067                 // Compile eventual content filter reasons
3068                 $filter_reasons = [];
3069                 if (!$is_preview && DI::userSession()->getPublicContactId() != $item['author-id']) {
3070                         if (!empty($item['content-warning']) && (!DI::userSession()->getLocalUserId() || !DI::pConfig()->get(DI::userSession()->getLocalUserId(), 'system', 'disable_cw', false))) {
3071                                 $filter_reasons[] = DI::l10n()->t('Content warning: %s', $item['content-warning']);
3072                         }
3073
3074                         $item['attachments'] = $attachments;
3075
3076                         $hook_data = [
3077                                 'item' => $item,
3078                                 'filter_reasons' => $filter_reasons
3079                         ];
3080                         Hook::callAll('prepare_body_content_filter', $hook_data);
3081                         $filter_reasons = $hook_data['filter_reasons'];
3082                         unset($hook_data);
3083                 }
3084
3085                 $hook_data = [
3086                         'item' => $item,
3087                         'html' => $s,
3088                         'preview' => $is_preview,
3089                         'filter_reasons' => $filter_reasons
3090                 ];
3091                 Hook::callAll('prepare_body', $hook_data);
3092                 $s = $hook_data['html'];
3093                 unset($hook_data);
3094
3095                 if (!$attach) {
3096                         // Replace the blockquotes with quotes that are used in mails.
3097                         $mailquote = '<blockquote type="cite" class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">';
3098                         $s = str_replace(['<blockquote>', '<blockquote class="spoiler">', '<blockquote class="author">'], [$mailquote, $mailquote, $mailquote], $s);
3099                         return $s;
3100                 }
3101
3102                 if (!empty($shared_attachments)) {
3103                         $s = self::addVisualAttachments($shared_attachments, $shared_item, $s, true);
3104                         $s = self::addLinkAttachment($shared_uri_id ?: $item['uri-id'], $shared_attachments, $body, $s, true, []);
3105                         $s = self::addNonVisualAttachments($shared_attachments, $item, $s, true);
3106                         $body = BBCode::removeSharedData($body);
3107                 }
3108
3109                 $s = self::addVisualAttachments($attachments, $item, $s, false);
3110                 $s = self::addLinkAttachment($item['uri-id'], $attachments, $body, $s, false, $shared_links);
3111                 $s = self::addNonVisualAttachments($attachments, $item, $s, false);
3112                 $s = self::addQuestions($item, $s);
3113
3114                 // Map.
3115                 if (strpos($s, '<div class="map">') !== false && !empty($item['coord'])) {
3116                         $x = Map::byCoordinates(trim($item['coord']));
3117                         if ($x) {
3118                                 $s = preg_replace('/\<div class\=\"map\"\>/', '$0' . $x, $s);
3119                         }
3120                 }
3121
3122                 // Replace friendica image url size with theme preference.
3123                 if (!empty($a->getThemeInfoValue('item_image_size'))) {
3124                         $ps = $a->getThemeInfoValue('item_image_size');
3125                         $s = preg_replace('|(<img[^>]+src="[^"]+/photo/[0-9a-f]+)-[0-9]|', "$1-" . $ps, $s);
3126                 }
3127
3128                 $s = HTML::applyContentFilter($s, $filter_reasons);
3129
3130                 $hook_data = ['item' => $item, 'html' => $s];
3131                 Hook::callAll('prepare_body_final', $hook_data);
3132
3133                 return $hook_data['html'];
3134         }
3135
3136         /**
3137          * Check if the body contains a link
3138          *
3139          * @param string $body
3140          * @param string $url
3141          * @param int    $type
3142          * @return bool
3143          */
3144         public static function containsLink(string $body, string $url, int $type = 0): bool
3145         {
3146                 // Make sure that for example site parameters aren't used when testing if the link is contained in the body
3147                 $urlparts = parse_url($url);
3148                 if (empty($urlparts)) {
3149                         return false;
3150                 }
3151
3152                 unset($urlparts['query']);
3153                 unset($urlparts['fragment']);
3154
3155                 try {
3156                         $url = (string)Uri::fromParts($urlparts);
3157                 } catch (\InvalidArgumentException $e) {
3158                         DI::logger()->notice('Invalid URL', ['$url' => $url, '$urlparts' => $urlparts]);
3159                         /* See https://github.com/friendica/friendica/issues/12113
3160                          * Malformed URLs will result in a Fatal Error
3161                          */
3162                         return false;
3163                 }
3164
3165                 // Remove media links to only search in embedded content
3166                 // @todo Check images for image link, audio for audio links, ...
3167                 if (in_array($type, [Post\Media::AUDIO, Post\Media::VIDEO, Post\Media::IMAGE])) {
3168                         $body = preg_replace("/\[url=[^\[\]]*\](.*)\[\/url\]/Usi", ' $1 ', $body);
3169                 }
3170
3171                 if (strpos($body, $url)) {
3172                         return true;
3173                 }
3174
3175                 foreach ([0, 1, 2] as $size) {
3176                         if (preg_match('#/photo/.*-' . $size . '\.#ism', $url) &&
3177                                 strpos(preg_replace('#(/photo/.*)-[012]\.#ism', '$1-' . $size . '.', $body), $url)) {
3178                                 return true;
3179                         }
3180                 }
3181
3182                 return false;
3183         }
3184
3185         /**
3186          * Replace visual attachments in the body
3187          *
3188          * @param array $attachments
3189          * @param string $body
3190          * @return string modified body
3191          */
3192         private static function replaceVisualAttachments(array $attachments, string $body): string
3193         {
3194                 DI::profiler()->startRecording('rendering');
3195
3196                 foreach ($attachments['visual'] as $attachment) {
3197                         if (!empty($attachment['preview'])) {
3198                                 $proxy   = Post\Media::getPreviewUrlForId($attachment['id'], Proxy::SIZE_LARGE);
3199                                 $search  = ['[img=' . $attachment['preview'] . ']', ']' . $attachment['preview'] . '[/img]'];
3200                                 $replace = ['[img=' . $proxy . ']', ']' . $proxy . '[/img]'];
3201
3202                                 $body = str_replace($search, $replace, $body);
3203                         } elseif ($attachment['filetype'] == 'image') {
3204                                 $proxy   = Post\Media::getUrlForId($attachment['id']);
3205                                 $search  = ['[img=' . $attachment['url'] . ']', ']' . $attachment['url'] . '[/img]'];
3206                                 $replace = ['[img=' . $proxy . ']', ']' . $proxy . '[/img]'];
3207
3208                                 $body = str_replace($search, $replace, $body);
3209                         }
3210                 }
3211                 DI::profiler()->stopRecording();
3212                 return $body;
3213         }
3214
3215         /**
3216          * Add visual attachments to the content
3217          *
3218          * @param array $attachments
3219          * @param array $item
3220          * @param string $content
3221          * @return string modified content
3222          */
3223         private static function addVisualAttachments(array $attachments, array $item, string $content, bool $shared): string
3224         {
3225                 DI::profiler()->startRecording('rendering');
3226                 $leading  = '';
3227                 $trailing = '';
3228                 $images   = [];
3229
3230                 // @todo In the future we should make a single for the template engine with all media in it. This allows more flexibilty.
3231                 foreach ($attachments['visual'] as $attachment) {
3232                         if (self::containsLink($item['body'], $attachment['preview'] ?? $attachment['url'], $attachment['type'])) {
3233                                 continue;
3234                         }
3235
3236                         if ($attachment['filetype'] == 'image') {
3237                                 $preview_url = Post\Media::getPreviewUrlForId($attachment['id'], ($attachment['width'] > $attachment['height']) ? Proxy::SIZE_MEDIUM : Proxy::SIZE_LARGE);
3238                         } elseif (!empty($attachment['preview'])) {
3239                                 $preview_url = Post\Media::getPreviewUrlForId($attachment['id'], Proxy::SIZE_LARGE);
3240                         } else {
3241                                 $preview_url = '';
3242                         }
3243
3244                         if ($preview_url && self::containsLink($item['body'], $preview_url)) {
3245                                 continue;
3246                         }
3247
3248                         if (($attachment['filetype'] == 'video')) {
3249                                 /// @todo Move the template to /content as well
3250                                 $media = Renderer::replaceMacros(Renderer::getMarkupTemplate('video_top.tpl'), [
3251                                         '$video' => [
3252                                                 'id'      => $attachment['id'],
3253                                                 'src'     => $attachment['url'],
3254                                                 'name'    => $attachment['name'] ?: $attachment['url'],
3255                                                 'preview' => $preview_url,
3256                                                 'mime'    => $attachment['mimetype'],
3257                                         ],
3258                                 ]);
3259                                 if (($item['post-type'] ?? null) == Item::PT_VIDEO) {
3260                                         $leading .= $media;
3261                                 } else {
3262                                         $trailing .= $media;
3263                                 }
3264                         } elseif ($attachment['filetype'] == 'audio') {
3265                                 $media = Renderer::replaceMacros(Renderer::getMarkupTemplate('content/audio.tpl'), [
3266                                         '$audio' => [
3267                                                 'id'     => $attachment['id'],
3268                                                 'src'    => $attachment['url'],
3269                                                 'name'   => $attachment['name'] ?: $attachment['url'],
3270                                                 'mime'   => $attachment['mimetype'],
3271                                         ],
3272                                 ]);
3273                                 if (($item['post-type'] ?? null) == Item::PT_AUDIO) {
3274                                         $leading .= $media;
3275                                 } else {
3276                                         $trailing .= $media;
3277                                 }
3278                         } elseif ($attachment['filetype'] == 'image') {
3279                                 $src_url = Post\Media::getUrlForId($attachment['id']);
3280                                 if (self::containsLink($item['body'], $src_url)) {
3281                                         continue;
3282                                 }
3283                                 $images[] = ['src' => $src_url, 'preview' => $preview_url, 'attachment' => $attachment];
3284                         }
3285                 }
3286
3287                 foreach ($images as $image) {
3288                         $media = Renderer::replaceMacros(Renderer::getMarkupTemplate('content/image.tpl'), [
3289                                 '$image' => $image,
3290                         ]);
3291                         // On Diaspora posts the attached pictures are leading
3292                         if ($item['network'] == Protocol::DIASPORA) {
3293                                 $leading .= $media;
3294                         } else {
3295                                 $trailing .= $media;
3296                         }
3297                 }
3298
3299                 if ($shared) {
3300                         $content = str_replace(BBCode::TOP_ANCHOR, '<div class="body-attach">' . $leading . '<div class="clear"></div></div>' . BBCode::TOP_ANCHOR, $content);
3301                         $content = str_replace(BBCode::BOTTOM_ANCHOR, '<div class="body-attach">' . $trailing . '<div class="clear"></div></div>' . BBCode::BOTTOM_ANCHOR, $content);
3302                 } else {
3303                         if ($leading != '') {
3304                                 $content = '<div class="body-attach">' . $leading . '<div class="clear"></div></div>' . $content;
3305                         }
3306
3307                         if ($trailing != '') {
3308                                 $content .= '<div class="body-attach">' . $trailing . '<div class="clear"></div></div>';
3309                         }
3310                 }
3311
3312                 DI::profiler()->stopRecording();
3313                 return $content;
3314         }
3315
3316         /**
3317          * Add link attachment to the content
3318          *
3319          * @param array  $attachments
3320          * @param string $body
3321          * @param string $content
3322          * @param bool   $shared
3323          * @param array  $ignore_links A list of URLs to ignore
3324          * @return string modified content
3325          */
3326         private static function addLinkAttachment(int $uriid, array $attachments, string $body, string $content, bool $shared, array $ignore_links): string
3327         {
3328                 DI::profiler()->startRecording('rendering');
3329                 // Don't show a preview when there is a visual attachment (audio or video)
3330                 $types = array_column($attachments['visual'], 'type');
3331                 $preview = !in_array(Post\Media::IMAGE, $types) && !in_array(Post\Media::VIDEO, $types);
3332
3333                 if (!empty($attachments['link'])) {
3334                         foreach ($attachments['link'] as $link) {
3335                                 $found = false;
3336                                 foreach ($ignore_links as $ignore_link) {
3337                                         if (Strings::compareLink($link['url'], $ignore_link)) {
3338                                                 $found = true;
3339                                         }
3340                                 }
3341                                 // @todo Judge between the links to use the one with most information
3342                                 if (!$found && (empty($attachment) || !empty($link['author-name']) ||
3343                                         (empty($attachment['name']) && !empty($link['name'])) ||
3344                                         (empty($attachment['description']) && !empty($link['description'])) ||
3345                                         (empty($attachment['preview']) && !empty($link['preview'])))) {
3346                                         $attachment = $link;
3347                                 }
3348                         }
3349                 }
3350
3351                 if (!empty($attachment)) {
3352                         $data = [
3353                                 'after' => '',
3354                                 'author_name' => $attachment['author-name'] ?? '',
3355                                 'author_url' =>  $attachment['author-url'] ?? '',
3356                                 'description' => $attachment['description'] ?? '',
3357                                 'image' => '',
3358                                 'preview' => '',
3359                                 'provider_name' => $attachment['publisher-name'] ?? '',
3360                                 'provider_url' => $attachment['publisher-url'] ?? '',
3361                                 'text' => '',
3362                                 'title' => $attachment['name'] ?? '',
3363                                 'type' => 'link',
3364                                 'url' => $attachment['url']];
3365
3366                         if ($preview && !empty($attachment['preview'])) {
3367                                 if ($attachment['preview-width'] >= 500) {
3368                                         $data['image'] = Post\Media::getPreviewUrlForId($attachment['id'], Proxy::SIZE_MEDIUM);
3369                                 } else {
3370                                         $data['preview'] = Post\Media::getPreviewUrlForId($attachment['id'], Proxy::SIZE_MEDIUM);
3371                                 }
3372                         }
3373
3374                         if (!empty($data['description']) && !empty($content)) {
3375                                 similar_text($data['description'], $content, $percent);
3376                         } else {
3377                                 $percent = 0;
3378                         }
3379
3380                         if (!empty($data['description']) && (($data['title'] == $data['description']) || ($percent > 95) || (strpos($content, $data['description']) !== false))) {
3381                                 $data['description'] = '';
3382                         }
3383
3384                         if (($data['author_name'] ?? '') == ($data['provider_name'] ?? '')) {
3385                                 $data['author_name'] = '';
3386                         }
3387
3388                         if (($data['author_url'] ?? '') == ($data['provider_url'] ?? '')) {
3389                                 $data['author_url'] = '';
3390                         }
3391                 } elseif (preg_match("/.*(\[attachment.*?\].*?\[\/attachment\]).*/ism", $body, $match)) {
3392                         $data = BBCode::getAttachmentData($match[1]);
3393                 }
3394                 DI::profiler()->stopRecording();
3395
3396                 if (isset($data['url']) && !in_array(strtolower($data['url']), $ignore_links)) {
3397                         if (!empty($data['description']) || !empty($data['image']) || !empty($data['preview'])) {
3398                                 $parts = parse_url($data['url']);
3399                                 if (!empty($parts['scheme']) && !empty($parts['host'])) {
3400                                         if (empty($data['provider_name'])) {
3401                                                 $data['provider_name'] = $parts['host'];
3402                                         }
3403                                         if (empty($data['provider_url']) || empty(parse_url($data['provider_url'], PHP_URL_SCHEME))) {
3404                                                 $data['provider_url'] = $parts['scheme'] . '://' . $parts['host'];
3405
3406                                                 if (!empty($parts['port'])) {
3407                                                         $data['provider_url'] .= ':' . $parts['port'];
3408                                                 }
3409                                         }
3410                                 }
3411
3412                                 // @todo Use a template
3413                                 $preview_mode =  DI::pConfig()->get(DI::userSession()->getLocalUserId(), 'system', 'preview_mode', BBCode::PREVIEW_LARGE);
3414                                 if ($preview_mode != BBCode::PREVIEW_NONE) {
3415                                         $rendered = BBCode::convertAttachment('', BBCode::INTERNAL, false, $data, $uriid, $preview_mode);
3416                                 }
3417                         } elseif (!self::containsLink($content, $data['url'], Post\Media::HTML)) {
3418                                 $rendered = Renderer::replaceMacros(Renderer::getMarkupTemplate('content/link.tpl'), [
3419                                         '$url'  => $data['url'],
3420                                         '$title' => $data['title'],
3421                                 ]);
3422                         } else {
3423                                 return $content;
3424                         }
3425
3426                         if ($shared) {
3427                                 return str_replace(BBCode::BOTTOM_ANCHOR, BBCode::BOTTOM_ANCHOR . $rendered, $content);
3428                         } else {
3429                                 return $content . $rendered;
3430                         }
3431                 }
3432                 return $content;
3433         }
3434
3435         /**
3436          * Add non visual attachments to the content
3437          *
3438          * @param array $attachments
3439          * @param array $item
3440          * @param string $content
3441          * @return string modified content
3442          */
3443         private static function addNonVisualAttachments(array $attachments, array $item, string $content): string
3444         {
3445                 DI::profiler()->startRecording('rendering');
3446                 $trailing = '';
3447                 foreach ($attachments['additional'] as $attachment) {
3448                         if (strpos($item['body'], $attachment['url'])) {
3449                                 continue;
3450                         }
3451
3452                         $author = ['uid' => 0, 'id' => $item['author-id'],
3453                                 'network' => $item['author-network'], 'url' => $item['author-link']];
3454                         $the_url = Contact::magicLinkByContact($author, $attachment['url']);
3455
3456                         $title = Strings::escapeHtml(trim(($attachment['description'] ?? '') ?: $attachment['url']));
3457
3458                         if (!empty($attachment['size'])) {
3459                                 $title .= ' ' . $attachment['size'] . ' ' . DI::l10n()->t('bytes');
3460                         }
3461
3462                         /// @todo Use a template
3463                         $icon = '<div class="attachtype icon s22 type-' . $attachment['filetype'] . ' subtype-' . $attachment['subtype'] . '"></div>';
3464                         $trailing .= '<a href="' . strip_tags($the_url) . '" title="' . $title . '" class="attachlink" target="_blank" rel="noopener noreferrer" >' . $icon . '</a>';
3465                 }
3466
3467                 if ($trailing != '') {
3468                         $content .= '<div class="body-attach">' . $trailing . '<div class="clear"></div></div>';
3469                 }
3470
3471                 DI::profiler()->stopRecording();
3472                 return $content;
3473         }
3474
3475         private static function addQuestions(array $item, string $content): string
3476         {
3477                 DI::profiler()->startRecording('rendering');
3478                 if (!empty($item['question-id'])) {
3479                         $question = [
3480                                 'id'       => $item['question-id'],
3481                                 'multiple' => $item['question-multiple'],
3482                                 'voters'   => $item['question-voters'],
3483                                 'endtime'  => $item['question-end-time']
3484                         ];
3485
3486                         $options = Post\QuestionOption::getByURIId($item['uri-id']);
3487                         foreach ($options as $key => $option) {
3488                                 if ($question['voters'] > 0) {
3489                                         $percent = $option['replies'] / $question['voters'] * 100;
3490                                         $options[$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));
3491                                 } else {
3492                                         $options[$key]['vote'] = DI::l10n()->tt('%2$s (%1$d vote)', '%2$s (%1$d votes)', $option['replies'], $option['name']);
3493                                 }
3494                         }
3495
3496                         if (!empty($question['voters']) && !empty($question['endtime'])) {
3497                                 $summary = DI::l10n()->tt('%d voter. Poll end: %s', '%d voters. Poll end: %s', $question['voters'], Temporal::getRelativeDate($question['endtime']));
3498                         } elseif (!empty($question['voters'])) {
3499                                 $summary = DI::l10n()->tt('%d voter.', '%d voters.', $question['voters']);
3500                         } elseif (!empty($question['endtime'])) {
3501                                 $summary = DI::l10n()->t('Poll end: %s', Temporal::getRelativeDate($question['endtime']));
3502                         } else {
3503                                 $summary = '';
3504                         }
3505
3506                         $content .= Renderer::replaceMacros(Renderer::getMarkupTemplate('content/question.tpl'), [
3507                                 '$question' => $question,
3508                                 '$options'  => $options,
3509                                 '$summary'  => $summary,
3510                         ]);
3511         }
3512                 DI::profiler()->stopRecording();
3513                 return $content;
3514         }
3515
3516         /**
3517          * get private link for item
3518          *
3519          * @param array $item
3520          * @return boolean|array False if item has not plink, otherwise array('href'=>plink url, 'title'=>translated title)
3521          * @throws \Exception
3522          */
3523         public static function getPlink(array $item)
3524         {
3525                 if (!empty($item['plink']) && Network::isValidHttpUrl($item['plink'])) {
3526                         $plink = $item['plink'];
3527                 } elseif (!empty($item['uri']) && Network::isValidHttpUrl($item['uri']) && !Network::isLocalLink($item['uri'])) {
3528                         $plink = $item['uri'];
3529                 }
3530
3531                 if (DI::userSession()->getLocalUserId()) {
3532                         $ret = [
3533                                 'href' => "display/" . $item['guid'],
3534                                 'orig' => "display/" . $item['guid'],
3535                                 'title' => DI::l10n()->t('View on separate page'),
3536                                 'orig_title' => DI::l10n()->t('View on separate page'),
3537                         ];
3538
3539                         if (!empty($plink) && ($item['private'] == self::PRIVATE)) {
3540                                 $author = ['uid' => 0, 'id' => $item['author-id'],
3541                                         'network' => $item['author-network'], 'url' => $item['author-link']];
3542                                 $plink = Contact::magicLinkByContact($author, $plink);
3543                         }
3544
3545                         if (!empty($plink)) {
3546                                 $ret['href'] = DI::baseUrl()->remove($plink);
3547                                 $ret['title'] = DI::l10n()->t('Link to source');
3548                         }
3549                 } elseif (!empty($plink) && ($item['private'] != self::PRIVATE)) {
3550                         $ret = [
3551                                 'href' => $plink,
3552                                 'orig' => $plink,
3553                                 'title' => DI::l10n()->t('Link to source'),
3554                                 'orig_title' => DI::l10n()->t('Link to source'),
3555                         ];
3556                 } else {
3557                         $ret = [];
3558                 }
3559
3560                 return $ret;
3561         }
3562
3563         /**
3564          * Does the given uri-id belongs to a post that is sent as starting post to a forum?
3565          *
3566          * @param int $uri_id
3567          *
3568          * @return boolean "true" when it is a forum post
3569          */
3570         public static function isForumPost(int $uri_id): bool
3571         {
3572                 foreach (Tag::getByURIId($uri_id, [Tag::EXCLUSIVE_MENTION]) as $tag) {
3573                         if (DBA::exists('contact', ['uid' => 0, 'nurl' => Strings::normaliseLink($tag['url']), 'contact-type' => Contact::TYPE_COMMUNITY])) {
3574                                 return true;
3575                         }
3576                 }
3577                 return false;
3578         }
3579
3580         /**
3581          * Search item id for given URI or plink
3582          *
3583          * @param string $uri
3584          * @param integer $uid
3585          *
3586          * @return integer item id
3587          */
3588         public static function searchByLink(string $uri, int $uid = 0): int
3589         {
3590                 $ssl_uri = str_replace('http://', 'https://', $uri);
3591                 $uris = [$uri, $ssl_uri, Strings::normaliseLink($uri)];
3592
3593                 $item = Post::selectFirst(['id'], ['uri' => $uris, 'uid' => $uid]);
3594                 if (DBA::isResult($item)) {
3595                         return $item['id'];
3596                 }
3597
3598                 $item = Post::selectFirst(['id'], ['plink' => $uris, 'uid' => $uid]);
3599                 if (DBA::isResult($item)) {
3600                         return $item['id'];
3601                 }
3602
3603                 return 0;
3604         }
3605
3606         /**
3607          * Return the URI for a link to the post
3608          *
3609          * @param string $uri URI or link to post
3610          *
3611          * @return string URI
3612          */
3613         public static function getURIByLink(string $uri): string
3614         {
3615                 $ssl_uri = str_replace('http://', 'https://', $uri);
3616                 $uris = [$uri, $ssl_uri, Strings::normaliseLink($uri)];
3617
3618                 $item = Post::selectFirst(['uri'], ['uri' => $uris]);
3619                 if (DBA::isResult($item)) {
3620                         return $item['uri'];
3621                 }
3622
3623                 $item = Post::selectFirst(['uri'], ['plink' => $uris]);
3624                 if (DBA::isResult($item)) {
3625                         return $item['uri'];
3626                 }
3627
3628                 return '';
3629         }
3630
3631         /**
3632          * Fetches item for given URI or plink
3633          *
3634          * @param string $uri
3635          * @param integer $uid
3636          *
3637          * @return integer item id
3638          */
3639         public static function fetchByLink(string $uri, int $uid = 0): int
3640         {
3641                 Logger::info('Trying to fetch link', ['uid' => $uid, 'uri' => $uri]);
3642                 $item_id = self::searchByLink($uri, $uid);
3643                 if (!empty($item_id)) {
3644                         Logger::info('Link found', ['uid' => $uid, 'uri' => $uri, 'id' => $item_id]);
3645                         return $item_id;
3646                 }
3647
3648                 $hookData = [
3649                         'uri'     => $uri,
3650                         'uid'     => $uid,
3651                         'item_id' => null,
3652                 ];
3653
3654                 Hook::callAll('item_by_link', $hookData);
3655
3656                 if (isset($hookData['item_id'])) {
3657                         return is_numeric($hookData['item_id']) ? $hookData['item_id'] : 0;
3658                 }
3659
3660                 $fetched_uri = ActivityPub\Processor::fetchMissingActivity($uri);
3661
3662                 if ($fetched_uri) {
3663                         $item_id = self::searchByLink($fetched_uri, $uid);
3664                 } else {
3665                         $item_id = Diaspora::fetchByURL($uri);
3666                 }
3667
3668                 if (!empty($item_id)) {
3669                         Logger::info('Link fetched', ['uid' => $uid, 'uri' => $uri, 'id' => $item_id]);
3670                         return $item_id;
3671                 }
3672
3673                 Logger::info('Link not found', ['uid' => $uid, 'uri' => $uri]);
3674                 return 0;
3675         }
3676
3677         /**
3678          * Check a prospective item array against user-level permissions
3679          *
3680          * @param array $item Expected keys: uri, gravity, and
3681          *                    author-link if is author-id is set,
3682          *                    owner-link if is owner-id is set,
3683          *                    causer-link if is causer-id is set.
3684          * @param int   $user_id Local user ID
3685          * @return bool
3686          * @throws \Exception
3687          */
3688         protected static function isAllowedByUser(array $item, int $user_id): bool
3689         {
3690                 if (!empty($item['author-id']) && Contact\User::isBlocked($item['author-id'], $user_id)) {
3691                         Logger::notice('Author is blocked by user', ['author-link' => $item['author-link'], 'uid' => $user_id, 'item-uri' => $item['uri']]);
3692                         return false;
3693                 }
3694
3695                 if (!empty($item['owner-id']) && Contact\User::isBlocked($item['owner-id'], $user_id)) {
3696                         Logger::notice('Owner is blocked by user', ['owner-link' => $item['owner-link'], 'uid' => $user_id, 'item-uri' => $item['uri']]);
3697                         return false;
3698                 }
3699
3700                 // The causer is set during a thread completion, for example because of a reshare. It countains the responsible actor.
3701                 if (!empty($item['causer-id']) && Contact\User::isBlocked($item['causer-id'], $user_id)) {
3702                         Logger::notice('Causer is blocked by user', ['causer-link' => $item['causer-link'] ?? $item['causer-id'], 'uid' => $user_id, 'item-uri' => $item['uri']]);
3703                         return false;
3704                 }
3705
3706                 if (!empty($item['causer-id']) && ($item['gravity'] === self::GRAVITY_PARENT) && Contact\User::isIgnored($item['causer-id'], $user_id)) {
3707                         Logger::notice('Causer is ignored by user', ['causer-link' => $item['causer-link'] ?? $item['causer-id'], 'uid' => $user_id, 'item-uri' => $item['uri']]);
3708                         return false;
3709                 }
3710
3711                 return true;
3712         }
3713
3714         /**
3715          * Fetch the uri-id of a quote
3716          *
3717          * @param string $body
3718          * @return integer
3719          */
3720         public static function getQuoteUriId(string $body, int $uid = 0): int
3721         {
3722                 $shared = BBCode::fetchShareAttributes($body);
3723                 if (empty($shared['guid']) && empty($shared['message_id'])) {
3724                         return 0;
3725                 }
3726
3727                 if (empty($shared['link']) && empty($shared['message_id'])) {
3728                         Logger::notice('Invalid share block.', ['share' => $shared]);
3729                         return 0;
3730                 }
3731
3732                 if (!empty($shared['guid'])) {
3733                         $shared_item = Post::selectFirst(['uri-id'], ['guid' => $shared['guid'], 'uid' => [0, $uid]]);
3734                         if (!empty($shared_item['uri-id'])) {
3735                                 Logger::debug('Found post by guid', ['guid' => $shared['guid'], 'uid' => $uid]);
3736                                 return $shared_item['uri-id'];
3737                         }
3738                 }
3739
3740                 if (!empty($shared['message_id'])) {
3741                         $shared_item = Post::selectFirst(['uri-id'], ['uri' => $shared['message_id'], 'uid' => [0, $uid]]);
3742                         if (!empty($shared_item['uri-id'])) {
3743                                 Logger::debug('Found post by message_id', ['message_id' => $shared['message_id'], 'uid' => $uid]);
3744                                 return $shared_item['uri-id'];
3745                         }
3746                 }
3747
3748                 if (!empty($shared['link'])) {
3749                         $shared_item = Post::selectFirst(['uri-id'], ['plink' => $shared['link'], 'uid' => [0, $uid]]);
3750                         if (!empty($shared_item['uri-id'])) {
3751                                 Logger::debug('Found post by link', ['link' => $shared['link'], 'uid' => $uid]);
3752                                 return $shared_item['uri-id'];
3753                         }
3754                 }
3755
3756                 $url = $shared['message_id'] ?: $shared['link'];
3757                 $id = self::fetchByLink($url);
3758                 if (!$id) {
3759                         Logger::notice('Post could not be fetched.', ['url' => $url, 'uid' => $uid]);
3760                         return 0;
3761                 }
3762
3763                 $shared_item = Post::selectFirst(['uri-id'], ['id' => $id]);
3764                 if (!empty($shared_item['uri-id'])) {
3765                         Logger::debug('Fetched shared post', ['id' => $id, 'url' => $url, 'uid' => $uid]);
3766                         return $shared_item['uri-id'];
3767                 }
3768
3769                 Logger::warning('Post does not exist although it was supposed to had been fetched.', ['id' => $id, 'url' => $url, 'uid' => $uid]);
3770                 return 0;
3771         }
3772 }