src/Model/Item.php

   1 <?php
   2 /**
   3  * @copyright Copyright (C) 2010-2022, the Friendica project
   4  *
   5  * @license GNU AGPL version 3 or any later version
   6  *
   7  * This program is free software: you can redistribute it and/or modify
   8  * it under the terms of the GNU Affero General Public License as
   9  * published by the Free Software Foundation, either version 3 of the
  10  * License, or (at your option) any later version.
  11  *
  12  * This program is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  * GNU Affero General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU Affero General Public License
  18  * along with this program.  If not, see <https://www.gnu.org/licenses/>.
  19  *
  20  */
  21
  22 namespace Friendica\Model;
  23
  24 use Friendica\Content\Text\BBCode;
  25 use Friendica\Content\Text\HTML;
  26 use Friendica\Core\Hook;
  27 use Friendica\Core\Logger;
  28 use Friendica\Core\Protocol;
  29 use Friendica\Core\Renderer;
  30 use Friendica\Core\Session;
  31 use Friendica\Core\System;
  32 use Friendica\Model\Tag;
  33 use Friendica\Core\Worker;
  34 use Friendica\Database\DBA;
  35 use Friendica\DI;
  36 use Friendica\Model\Post;
  37 use Friendica\Protocol\Activity;
  38 use Friendica\Protocol\ActivityPub;
  39 use Friendica\Protocol\Diaspora;
  40 use Friendica\Util\DateTimeFormat;
  41 use Friendica\Util\Map;
  42 use Friendica\Util\Network;
  43 use Friendica\Util\Proxy;
  44 use Friendica\Util\Strings;
  45 use Friendica\Util\Temporal;
  46 use Friendica\Worker\Delivery;
  47 use LanguageDetection\Language;
  48
  49 class Item
  50 {
  51         // Posting types, inspired by https://www.w3.org/TR/activitystreams-vocabulary/#object-types
  52         const PT_ARTICLE = 0;
  53         const PT_NOTE = 1;
  54         const PT_PAGE = 2;
  55         const PT_IMAGE = 16;
  56         const PT_AUDIO = 17;
  57         const PT_VIDEO = 18;
  58         const PT_DOCUMENT = 19;
  59         const PT_EVENT = 32;
  60         const PT_POLL = 33;
  61         const PT_PERSONAL_NOTE = 128;
  62
  63         // Posting reasons (Why had a post been stored for a user?)
  64         const PR_NONE = 0;
  65         const PR_TAG = 64;
  66         const PR_TO = 65;
  67         const PR_CC = 66;
  68         const PR_BTO = 67;
  69         const PR_BCC = 68;
  70         const PR_FOLLOWER = 69;
  71         const PR_ANNOUNCEMENT = 70;
  72         const PR_COMMENT = 71;
  73         const PR_STORED = 72;
  74         const PR_GLOBAL = 73;
  75         const PR_RELAY = 74;
  76         const PR_FETCHED = 75;
  77
  78         // system.accept_only_sharer setting values
  79         const COMPLETION_NONE    = 1;
  80         const COMPLETION_COMMENT = 0;
  81         const COMPLETION_LIKE    = 2;
  82
  83         // Field list that is used to display the items
  84         const DISPLAY_FIELDLIST = [
  85                 'uid', 'id', 'parent', 'guid', 'network', 'gravity',
  86                 'uri-id', 'uri', 'thr-parent-id', 'thr-parent', 'parent-uri-id', 'parent-uri',
  87                 'commented', 'created', 'edited', 'received', 'verb', 'object-type', 'postopts', 'plink',
  88                 'wall', 'private', 'starred', 'origin', 'parent-origin', 'title', 'body', 'language',
  89                 'content-warning', 'location', 'coord', 'app', 'rendered-hash', 'rendered-html', 'object',
  90                 'allow_cid', 'allow_gid', 'deny_cid', 'deny_gid', 'mention', 'global',
  91                 'author-id', 'author-link', 'author-name', 'author-avatar', 'author-network', 'author-updated', 'author-gsid', 'author-addr', 'author-uri-id',
  92                 'owner-id', 'owner-link', 'owner-name', 'owner-avatar', 'owner-network', 'owner-contact-type', 'owner-updated',
  93                 'causer-id', 'causer-link', 'causer-name', 'causer-avatar', 'causer-contact-type', 'causer-network',
  94                 'contact-id', 'contact-uid', 'contact-link', 'contact-name', 'contact-avatar',
  95                 'writable', 'self', 'cid', 'alias',
  96                 'event-created', 'event-edited', 'event-start', 'event-finish',
  97                 'event-summary', 'event-desc', 'event-location', 'event-type',
  98                 'event-nofinish', 'event-ignore', 'event-id',
  99                 "question-id", "question-multiple", "question-voters", "question-end-time",
 100                 "has-categories", "has-media",
 101                 'delivery_queue_count', 'delivery_queue_done', 'delivery_queue_failed'
 102         ];
 103
 104         // Field list that is used to deliver items via the protocols
 105         const DELIVER_FIELDLIST = ['uid', 'id', 'parent', 'uri-id', 'uri', 'thr-parent', 'parent-uri', 'guid',
 106                         'parent-guid', 'received', 'created', 'edited', 'verb', 'object-type', 'object', 'target',
 107                         'private', 'title', 'body', 'raw-body', 'location', 'coord', 'app',
 108                         'inform', 'deleted', 'extid', 'post-type', 'post-reason', 'gravity',
 109                         'allow_cid', 'allow_gid', 'deny_cid', 'deny_gid',
 110                         'author-id', 'author-link', 'author-name', 'author-avatar', 'owner-id', 'owner-link', 'contact-uid',
 111                         'signed_text', 'network', 'wall', 'contact-id', 'plink', 'origin',
 112                         'thr-parent-id', 'parent-uri-id', 'postopts', 'pubmail',
 113                         'event-created', 'event-edited', 'event-start', 'event-finish',
 114                         'event-summary', 'event-desc', 'event-location', 'event-type',
 115                         'event-nofinish', 'event-ignore', 'event-id'];
 116
 117         // All fields in the item table
 118         const ITEM_FIELDLIST = ['id', 'uid', 'parent', 'uri', 'parent-uri', 'thr-parent',
 119                         'guid', 'uri-id', 'parent-uri-id', 'thr-parent-id', 'vid',
 120                         'contact-id', 'wall', 'gravity', 'extid', 'psid',
 121                         'created', 'edited', 'commented', 'received', 'changed', 'verb',
 122                         'postopts', 'plink', 'resource-id', 'event-id', 'inform',
 123                         'allow_cid', 'allow_gid', 'deny_cid', 'deny_gid', 'post-type', 'post-reason',
 124                         'private', 'pubmail', 'visible', 'starred',
 125                         'unseen', 'deleted', 'origin', 'mention', 'global', 'network',
 126                         'title', 'content-warning', 'body', 'location', 'coord', 'app',
 127                         'rendered-hash', 'rendered-html', 'object-type', 'object', 'target-type', 'target',
 128                         'author-id', 'author-link', 'author-name', 'author-avatar', 'author-network',
 129                         'owner-id', 'owner-link', 'owner-name', 'owner-avatar', 'causer-id'];
 130
 131         // List of all verbs that don't need additional content data.
 132         // Never reorder or remove entries from this list. Just add new ones at the end, if needed.
 133         const ACTIVITIES = [
 134                 Activity::LIKE, Activity::DISLIKE,
 135                 Activity::ATTEND, Activity::ATTENDNO, Activity::ATTENDMAYBE,
 136                 Activity::FOLLOW,
 137                 Activity::ANNOUNCE];
 138
 139         const PUBLIC = 0;
 140         const PRIVATE = 1;
 141         const UNLISTED = 2;
 142
 143         /**
 144          * Update existing item entries
 145          *
 146          * @param array $fields    The fields that are to be changed
 147          * @param array $condition The condition for finding the item entries
 148          *
 149          * In the future we may have to change permissions as well.
 150          * Then we had to add the user id as third parameter.
 151          *
 152          * A return value of "0" doesn't mean an error - but that 0 rows had been changed.
 153          *
 154          * @return integer|boolean number of affected rows - or "false" if there was an error
 155          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 156          */
 157         public static function update(array $fields, array $condition)
 158         {
 159                 if (empty($condition) || empty($fields)) {
 160                         return false;
 161                 }
 162
 163                 if (isset($fields['extid'])) {
 164                         $fields['external-id'] = ItemURI::getIdByURI($fields['extid']);
 165                 }
 166
 167                 if (!empty($fields['verb'])) {
 168                         $fields['vid'] = Verb::getID($fields['verb']);
 169                 }
 170
 171                 if (!empty($fields['edited'])) {
 172                         $previous = Post::selectFirst(['edited'], $condition);
 173                 }
 174
 175                 $rows = Post::update($fields, $condition);
 176                 if (is_bool($rows)) {
 177                         return $rows;
 178                 }
 179
 180                 // We only need to call the line by line update for specific fields
 181                 if (empty($fields['body']) && empty($fields['file']) &&
 182                         empty($fields['attach']) && empty($fields['edited'])) {
 183                         return $rows;
 184                 }
 185
 186                 Logger::info('Updating per single row method', ['fields' => $fields, 'condition' => $condition]);
 187
 188                 $items = Post::select(['id', 'origin', 'uri-id', 'uid', 'author-network'], $condition);
 189
 190                 $notify_items = [];
 191
 192                 while ($item = DBA::fetch($items)) {
 193                         if (!empty($fields['body'])) {
 194                                 Post\Media::insertFromAttachmentData($item['uri-id'], $fields['body']);
 195
 196                                 $content_fields = ['raw-body' => trim($fields['raw-body'] ?? $fields['body'])];
 197
 198                                 // Remove all media attachments from the body and store them in the post-media table
 199                                 // @todo On shared postings (Diaspora style and commented reshare) don't fetch content from the shared part
 200                                 $content_fields['raw-body'] = Post\Media::insertFromBody($item['uri-id'], $content_fields['raw-body']);
 201                                 $content_fields['raw-body'] = self::setHashtags($content_fields['raw-body']);
 202
 203                                 if ($item['author-network'] != Protocol::DFRN) {
 204                                         Post\Media::insertFromRelevantUrl($item['uri-id'], $content_fields['raw-body']);
 205                                 }
 206
 207                                 Post\Content::update($item['uri-id'], $content_fields);
 208                         }
 209
 210                         if (!empty($fields['file'])) {
 211                                 Post\Category::storeTextByURIId($item['uri-id'], $item['uid'], $fields['file']);
 212                         }
 213
 214                         if (!empty($fields['attach'])) {
 215                                 Post\Media::insertFromAttachment($item['uri-id'], $fields['attach']);
 216                         }
 217
 218                         // We only need to notfiy others when it is an original entry from us.
 219                         // Only call the notifier when the item had been edited and records had been changed.
 220                         if ($item['origin'] && !empty($fields['edited']) && ($previous['edited'] != $fields['edited'])) {
 221                                 $notify_items[] = $item['id'];
 222                         }
 223                 }
 224
 225                 DBA::close($items);
 226
 227                 foreach ($notify_items as $notify_item) {
 228                         $post = Post::selectFirst(['uri-id', 'uid'], ['id' => $notify_item]);
 229                         Worker::add(PRIORITY_HIGH, "Notifier", Delivery::POST, (int)$post['uri-id'], (int)$post['uid']);
 230                 }
 231
 232                 return $rows;
 233         }
 234
 235         /**
 236          * Delete an item and notify others about it - if it was ours
 237          *
 238          * @param array   $condition The condition for finding the item entries
 239          * @param integer $priority  Priority for the notification
 240          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 241          */
 242         public static function markForDeletion($condition, $priority = PRIORITY_HIGH)
 243         {
 244                 $items = Post::select(['id'], $condition);
 245                 while ($item = Post::fetch($items)) {
 246                         self::markForDeletionById($item['id'], $priority);
 247                 }
 248                 DBA::close($items);
 249         }
 250
 251         /**
 252          * Delete an item for an user and notify others about it - if it was ours
 253          *
 254          * @param array   $condition The condition for finding the item entries
 255          * @param integer $uid       User who wants to delete this item
 256          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 257          */
 258         public static function deleteForUser($condition, $uid)
 259         {
 260                 if ($uid == 0) {
 261                         return;
 262                 }
 263
 264                 $items = Post::select(['id', 'uid', 'uri-id'], $condition);
 265                 while ($item = Post::fetch($items)) {
 266                         if (in_array($item['uid'], [$uid, 0])) {
 267                                 Post\User::update($item['uri-id'], $uid, ['hidden' => true], true);
 268                                 Post\ThreadUser::update($item['uri-id'], $uid, ['hidden' => true], true);
 269                         }
 270
 271                         if ($item['uid'] == $uid) {
 272                                 self::markForDeletionById($item['id'], PRIORITY_HIGH);
 273                         } elseif ($item['uid'] != 0) {
 274                                 Logger::notice('Wrong ownership. Not deleting item', ['id' => $item['id']]);
 275                         }
 276                 }
 277                 DBA::close($items);
 278         }
 279
 280         /**
 281          * Mark an item for deletion, delete related data and notify others about it - if it was ours
 282          *
 283          * @param integer $item_id
 284          * @param integer $priority Priority for the notification
 285          *
 286          * @return boolean success
 287          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 288          */
 289         public static function markForDeletionById($item_id, $priority = PRIORITY_HIGH)
 290         {
 291                 Logger::info('Mark item for deletion by id', ['id' => $item_id, 'callstack' => System::callstack()]);
 292                 // locate item to be deleted
 293                 $fields = ['id', 'uri', 'uri-id', 'uid', 'parent', 'parent-uri-id', 'origin',
 294                         'deleted', 'resource-id', 'event-id',
 295                         'verb', 'object-type', 'object', 'target', 'contact-id', 'psid', 'gravity'];
 296                 $item = Post::selectFirst($fields, ['id' => $item_id]);
 297                 if (!DBA::isResult($item)) {
 298                         Logger::info('Item not found.', ['id' => $item_id]);
 299                         return false;
 300                 }
 301
 302                 if ($item['deleted']) {
 303                         Logger::info('Item has already been marked for deletion.', ['id' => $item_id]);
 304                         return false;
 305                 }
 306
 307                 $parent = Post::selectFirst(['origin'], ['id' => $item['parent']]);
 308                 if (!DBA::isResult($parent)) {
 309                         $parent = ['origin' => false];
 310                 }
 311
 312                 // clean up categories and tags so they don't end up as orphans
 313                 Post\Category::deleteByURIId($item['uri-id'], $item['uid']);
 314
 315                 /*
 316                  * If item is a link to a photo resource, nuke all the associated photos
 317                  * (visitors will not have photo resources)
 318                  * This only applies to photos uploaded from the photos page. Photos inserted into a post do not
 319                  * generate a resource-id and therefore aren't intimately linked to the item.
 320                  */
 321                 /// @TODO: this should first check if photo is used elsewhere
 322                 if (strlen($item['resource-id'])) {
 323                         Photo::delete(['resource-id' => $item['resource-id'], 'uid' => $item['uid']]);
 324                 }
 325
 326                 // If item is a link to an event, delete the event.
 327                 if (intval($item['event-id'])) {
 328                         Event::delete($item['event-id']);
 329                 }
 330
 331                 // If item has attachments, drop them
 332                 $attachments = Post\Media::getByURIId($item['uri-id'], [Post\Media::DOCUMENT]);
 333                 foreach($attachments as $attachment) {
 334                         if (preg_match("|attach/(\d+)|", $attachment['url'], $matches)) {
 335                                 Attach::delete(['id' => $matches[1], 'uid' => $item['uid']]);
 336                         }
 337                 }
 338
 339                 // Set the item to "deleted"
 340                 $item_fields = ['deleted' => true, 'edited' => DateTimeFormat::utcNow(), 'changed' => DateTimeFormat::utcNow()];
 341                 Post::update($item_fields, ['id' => $item['id']]);
 342
 343                 Post\Category::storeTextByURIId($item['uri-id'], $item['uid'], '');
 344
 345                 if (!Post::exists(["`uri-id` = ? AND `uid` != 0 AND NOT `deleted`", $item['uri-id']])) {
 346                         self::markForDeletion(['uri-id' => $item['uri-id'], 'uid' => 0, 'deleted' => false], $priority);
 347                 }
 348
 349                 Post\DeliveryData::delete($item['uri-id']);
 350
 351                 // If it's the parent of a comment thread, kill all the kids
 352                 if ($item['gravity'] == GRAVITY_PARENT) {
 353                         self::markForDeletion(['parent' => $item['parent'], 'deleted' => false], $priority);
 354                 }
 355
 356                 // Is it our comment and/or our thread?
 357                 if (($item['origin'] || $parent['origin']) && ($item['uid'] != 0)) {
 358                         // When we delete the original post we will delete all existing copies on the server as well
 359                         self::markForDeletion(['uri-id' => $item['uri-id'], 'deleted' => false], $priority);
 360
 361                         // send the notification upstream/downstream
 362                         if ($priority) {
 363                                 Worker::add(['priority' => $priority, 'dont_fork' => true], "Notifier", Delivery::DELETION, (int)$item['uri-id'], (int)$item['uid']);
 364                         }
 365                 } elseif ($item['uid'] != 0) {
 366                         Post\User::update($item['uri-id'], $item['uid'], ['hidden' => true]);
 367                         Post\ThreadUser::update($item['uri-id'], $item['uid'], ['hidden' => true]);
 368                 }
 369
 370                 Logger::info('Item has been marked for deletion.', ['id' => $item_id]);
 371
 372                 return true;
 373         }
 374
 375         public static function guid($item, $notify)
 376         {
 377                 if (!empty($item['guid'])) {
 378                         return trim($item['guid']);
 379                 }
 380
 381                 if ($notify) {
 382                         // We have to avoid duplicates. So we create the GUID in form of a hash of the plink or uri.
 383                         // We add the hash of our own host because our host is the original creator of the post.
 384                         $prefix_host = DI::baseUrl()->getHostname();
 385                 } else {
 386                         $prefix_host = '';
 387
 388                         // We are only storing the post so we create a GUID from the original hostname.
 389                         if (!empty($item['author-link'])) {
 390                                 $parsed = parse_url($item['author-link']);
 391                                 if (!empty($parsed['host'])) {
 392                                         $prefix_host = $parsed['host'];
 393                                 }
 394                         }
 395
 396                         if (empty($prefix_host) && !empty($item['plink'])) {
 397                                 $parsed = parse_url($item['plink']);
 398                                 if (!empty($parsed['host'])) {
 399                                         $prefix_host = $parsed['host'];
 400                                 }
 401                         }
 402
 403                         if (empty($prefix_host) && !empty($item['uri'])) {
 404                                 $parsed = parse_url($item['uri']);
 405                                 if (!empty($parsed['host'])) {
 406                                         $prefix_host = $parsed['host'];
 407                                 }
 408                         }
 409
 410                         // Is it in the format data@host.tld? - Used for mail contacts
 411                         if (empty($prefix_host) && !empty($item['author-link']) && strstr($item['author-link'], '@')) {
 412                                 $mailparts = explode('@', $item['author-link']);
 413                                 $prefix_host = array_pop($mailparts);
 414                         }
 415                 }
 416
 417                 if (!empty($item['plink'])) {
 418                         $guid = self::guidFromUri($item['plink'], $prefix_host);
 419                 } elseif (!empty($item['uri'])) {
 420                         $guid = self::guidFromUri($item['uri'], $prefix_host);
 421                 } else {
 422                         $guid = System::createUUID(hash('crc32', $prefix_host));
 423                 }
 424
 425                 return $guid;
 426         }
 427
 428         private static function contactId($item)
 429         {
 430                 if (!empty($item['contact-id']) && DBA::exists('contact', ['self' => true, 'id' => $item['contact-id']])) {
 431                         return $item['contact-id'];
 432                 } elseif (($item['gravity'] == GRAVITY_PARENT) && !empty($item['uid']) && !empty($item['contact-id']) && Contact::isSharing($item['contact-id'], $item['uid'])) {
 433                         return $item['contact-id'];
 434                 } elseif (!empty($item['uid']) && !Contact::isSharing($item['author-id'], $item['uid'])) {
 435                         return $item['author-id'];
 436                 } elseif (!empty($item['contact-id'])) {
 437                         return $item['contact-id'];
 438                 } else {
 439                         $contact_id = Contact::getIdForURL($item['author-link'], $item['uid']);
 440                         if (!empty($contact_id)) {
 441                                 return $contact_id;
 442                         }
 443                 }
 444                 return $item['author-id'];
 445         }
 446
 447         /**
 448          * Write an item array into a spool file to be inserted later.
 449          * This command is called whenever there are issues storing an item.
 450          *
 451          * @param array $item The item fields that are to be inserted
 452          * @throws \Exception
 453          */
 454         private static function spool($orig_item)
 455         {
 456                 // Now we store the data in the spool directory
 457                 // We use "microtime" to keep the arrival order and "mt_rand" to avoid duplicates
 458                 $file = 'item-' . round(microtime(true) * 10000) . '-' . mt_rand() . '.msg';
 459
 460                 $spoolpath = System::getSpoolPath();
 461                 if ($spoolpath != "") {
 462                         $spool = $spoolpath . '/' . $file;
 463
 464                         file_put_contents($spool, json_encode($orig_item));
 465                         Logger::warning("Item wasn't stored - Item was spooled into file", ['file' => $file]);
 466                 }
 467         }
 468
 469         /**
 470          * Check if the item array is a duplicate
 471          *
 472          * @param array $item
 473          * @return boolean is it a duplicate?
 474          */
 475         private static function isDuplicate(array $item)
 476         {
 477                 // Checking if there is already an item with the same guid
 478                 $condition = ['guid' => $item['guid'], 'network' => $item['network'], 'uid' => $item['uid']];
 479                 if (Post::exists($condition)) {
 480                         Logger::notice('Found already existing item', $condition);
 481                         return true;
 482                 }
 483
 484                 $condition = ['uri-id' => $item['uri-id'], 'uid' => $item['uid'],
 485                         'network' => [$item['network'], Protocol::DFRN]];
 486                 if (Post::exists($condition)) {
 487                         Logger::notice('duplicated item with the same uri found.', $condition);
 488                         return true;
 489                 }
 490
 491                 // On Friendica and Diaspora the GUID is unique
 492                 if (in_array($item['network'], [Protocol::DFRN, Protocol::DIASPORA])) {
 493                         $condition = ['guid' => $item['guid'], 'uid' => $item['uid']];
 494                         if (Post::exists($condition)) {
 495                                 Logger::notice('duplicated item with the same guid found.', $condition);
 496                                 return true;
 497                         }
 498                 } elseif ($item['network'] == Protocol::OSTATUS) {
 499                         // Check for an existing post with the same content. There seems to be a problem with OStatus.
 500                         $condition = ["`body` = ? AND `network` = ? AND `created` = ? AND `contact-id` = ? AND `uid` = ?",
 501                                         $item['body'], $item['network'], $item['created'], $item['contact-id'], $item['uid']];
 502                         if (Post::exists($condition)) {
 503                                 Logger::notice('duplicated item with the same body found.', $item);
 504                                 return true;
 505                         }
 506                 }
 507
 508                 /*
 509                  * Check for already added items.
 510                  * There is a timing issue here that sometimes creates double postings.
 511                  * An unique index would help - but the limitations of MySQL (maximum size of index values) prevent this.
 512                  */
 513                 if (($item['uid'] == 0) && Post::exists(['uri-id' => $item['uri-id'], 'uid' => 0])) {
 514                         Logger::notice('Global item already stored.', ['uri-id' => $item['uri-id'], 'network' => $item['network']]);
 515                         return true;
 516                 }
 517
 518                 return false;
 519         }
 520
 521         /**
 522          * Check if the item array is valid
 523          *
 524          * @param array $item
 525          * @return boolean item is valid
 526          */
 527         public static function isValid(array $item)
 528         {
 529                 // When there is no content then we don't post it
 530                 if (($item['body'] . $item['title'] == '') && (empty($item['uri-id']) || !Post\Media::existsByURIId($item['uri-id']))) {
 531                         Logger::notice('No body, no title.');
 532                         return false;
 533                 }
 534
 535                 if (!empty($item['uid'])) {
 536                         $owner = User::getOwnerDataById($item['uid'], false);
 537                         if (!$owner) {
 538                                 Logger::notice('Missing item user owner data', ['uid' => $item['uid']]);
 539                                 return false;
 540                         }
 541
 542                         if ($owner['account_expired'] || $owner['account_removed']) {
 543                                 Logger::notice('Item user has been deleted/expired/removed', ['uid' => $item['uid'], 'deleted' => $owner['deleted'], 'account_expired' => $owner['account_expired'], 'account_removed' => $owner['account_removed']]);
 544                                 return false;
 545                         }
 546                 }
 547
 548                 if (!empty($item['author-id']) && Contact::isBlocked($item['author-id'])) {
 549                         Logger::notice('Author is blocked node-wide', ['author-link' => $item['author-link'], 'item-uri' => $item['uri']]);
 550                         return false;
 551                 }
 552
 553                 if (!empty($item['author-link']) && Network::isUrlBlocked($item['author-link'])) {
 554                         Logger::notice('Author server is blocked', ['author-link' => $item['author-link'], 'item-uri' => $item['uri']]);
 555                         return false;
 556                 }
 557
 558                 if (!empty($item['owner-id']) && Contact::isBlocked($item['owner-id'])) {
 559                         Logger::notice('Owner is blocked node-wide', ['owner-link' => $item['owner-link'], 'item-uri' => $item['uri']]);
 560                         return false;
 561                 }
 562
 563                 if (!empty($item['owner-link']) && Network::isUrlBlocked($item['owner-link'])) {
 564                         Logger::notice('Owner server is blocked', ['owner-link' => $item['owner-link'], 'item-uri' => $item['uri']]);
 565                         return false;
 566                 }
 567
 568                 if (!empty($item['uid']) && !self::isAllowedByUser($item, $item['uid'])) {
 569                         return false;
 570                 }
 571
 572                 if ($item['verb'] == Activity::FOLLOW) {
 573                         if (!$item['origin'] && ($item['author-id'] == Contact::getPublicIdByUserId($item['uid']))) {
 574                                 // Our own follow request can be relayed to us. We don't store it to avoid notification chaos.
 575                                 Logger::info("Follow: Don't store not origin follow request", ['parent-uri' => $item['parent-uri']]);
 576                                 return false;
 577                         }
 578
 579                         $condition = ['verb' => Activity::FOLLOW, 'uid' => $item['uid'],
 580                                 'parent-uri' => $item['parent-uri'], 'author-id' => $item['author-id']];
 581                         if (Post::exists($condition)) {
 582                                 // It happens that we receive multiple follow requests by the same author - we only store one.
 583                                 Logger::info('Follow: Found existing follow request from author', ['author-id' => $item['author-id'], 'parent-uri' => $item['parent-uri']]);
 584                                 return false;
 585                         }
 586                 }
 587
 588                 return true;
 589         }
 590
 591         /**
 592          * Check if the item array is too old
 593          *
 594          * @param array $item
 595          * @return boolean item is too old
 596          */
 597         public static function isTooOld(array $item)
 598         {
 599                 // check for create date and expire time
 600                 $expire_interval = DI::config()->get('system', 'dbclean-expire-days', 0);
 601
 602                 $user = DBA::selectFirst('user', ['expire'], ['uid' => $item['uid']]);
 603                 if (DBA::isResult($user) && ($user['expire'] > 0) && (($user['expire'] < $expire_interval) || ($expire_interval == 0))) {
 604                         $expire_interval = $user['expire'];
 605                 }
 606
 607                 if (($expire_interval > 0) && !empty($item['created'])) {
 608                         $expire_date = time() - ($expire_interval * 86400);
 609                         $created_date = strtotime($item['created']);
 610                         if ($created_date < $expire_date) {
 611                                 Logger::notice('Item created before expiration interval.', [
 612                                         'created' => date('c', $created_date),
 613                                         'expired' => date('c', $expire_date),
 614                                         '$item' => $item
 615                                 ]);
 616                                 return true;
 617                         }
 618                 }
 619
 620                 return false;
 621         }
 622
 623         /**
 624          * Return the id of the given item array if it has been stored before
 625          *
 626          * @param array $item
 627          * @return integer item id
 628          */
 629         private static function getDuplicateID(array $item)
 630         {
 631                 if (empty($item['network']) || in_array($item['network'], Protocol::FEDERATED)) {
 632                         $condition = ["`uri-id` = ? AND `uid` = ? AND `network` IN (?, ?, ?, ?)",
 633                                 $item['uri-id'], $item['uid'],
 634                                 Protocol::ACTIVITYPUB, Protocol::DIASPORA, Protocol::DFRN, Protocol::OSTATUS];
 635                         $existing = Post::selectFirst(['id', 'network'], $condition);
 636                         if (DBA::isResult($existing)) {
 637                                 // We only log the entries with a different user id than 0. Otherwise we would have too many false positives
 638                                 if ($item['uid'] != 0) {
 639                                         Logger::notice('Item already existed for user', [
 640                                                 'uri-id' => $item['uri-id'],
 641                                                 'uid' => $item['uid'],
 642                                                 'network' => $item['network'],
 643                                                 'existing_id' => $existing["id"],
 644                                                 'existing_network' => $existing["network"]
 645                                         ]);
 646                                 }
 647
 648                                 return $existing["id"];
 649                         }
 650                 }
 651                 return 0;
 652         }
 653
 654         /**
 655          * Fetch top-level parent data for the given item array
 656          *
 657          * @param array $item
 658          * @return array item array with parent data
 659          * @throws \Exception
 660          */
 661         private static function getTopLevelParent(array $item)
 662         {
 663                 $fields = ['uid', 'uri', 'parent-uri', 'id', 'deleted',
 664                         'uri-id', 'parent-uri-id',
 665                         'allow_cid', 'allow_gid', 'deny_cid', 'deny_gid',
 666                         'wall', 'private', 'origin', 'author-id'];
 667                 $condition = ['uri-id' => $item['thr-parent-id'], 'uid' => $item['uid']];
 668                 $params = ['order' => ['id' => false]];
 669                 $parent = Post::selectFirst($fields, $condition, $params);
 670
 671                 if (!DBA::isResult($parent) && $item['origin']) {
 672                         $stored = Item::storeForUserByUriId($item['thr-parent-id'], $item['uid']);
 673                         Logger::info('Stored thread parent item for user', ['uri-id' => $item['thr-parent-id'], 'uid' => $item['uid'], 'stored' => $stored]);
 674                         $parent = Post::selectFirst($fields, $condition, $params);
 675                 }
 676
 677                 if (!DBA::isResult($parent)) {
 678                         Logger::notice('item parent was not found - ignoring item', ['thr-parent-id' => $item['thr-parent-id'], 'uid' => $item['uid']]);
 679                         return [];
 680                 }
 681
 682                 if ($parent['uri-id'] == $parent['parent-uri-id']) {
 683                         return $parent;
 684                 }
 685
 686                 $condition = ['uri-id' => $parent['parent-uri-id'],
 687                         'parent-uri-id' => $parent['parent-uri-id'],
 688                         'uid' => $parent['uid']];
 689                 $params = ['order' => ['id' => false]];
 690                 $toplevel_parent = Post::selectFirst($fields, $condition, $params);
 691
 692                 if (!DBA::isResult($toplevel_parent) && $item['origin']) {
 693                         $stored = Item::storeForUserByUriId($item['parent-uri-id'], $item['uid']);
 694                         Logger::info('Stored parent item for user', ['uri-id' => $item['parent-uri-id'], 'uid' => $item['uid'], 'stored' => $stored]);
 695                         $toplevel_parent = Post::selectFirst($fields, $condition, $params);
 696                 }
 697
 698                 if (!DBA::isResult($toplevel_parent)) {
 699                         Logger::notice('item top level parent was not found - ignoring item', ['parent-uri-id' => $parent['parent-uri-id'], 'uid' => $parent['uid']]);
 700                         return [];
 701                 }
 702
 703                 return $toplevel_parent;
 704         }
 705
 706         /**
 707          * Get the gravity for the given item array
 708          *
 709          * @param array $item
 710          * @return integer gravity
 711          */
 712         private static function getGravity(array $item)
 713         {
 714                 $activity = DI::activity();
 715
 716                 if (isset($item['gravity'])) {
 717                         return intval($item['gravity']);
 718                 } elseif ($item['parent-uri-id'] === $item['uri-id']) {
 719                         return GRAVITY_PARENT;
 720                 } elseif ($activity->match($item['verb'], Activity::POST)) {
 721                         return GRAVITY_COMMENT;
 722                 } elseif ($activity->match($item['verb'], Activity::FOLLOW)) {
 723                         return GRAVITY_ACTIVITY;
 724                 } elseif ($activity->match($item['verb'], Activity::ANNOUNCE)) {
 725                         return GRAVITY_ACTIVITY;
 726                 }
 727                 Logger::info('Unknown gravity for verb', ['verb' => $item['verb']]);
 728                 return GRAVITY_UNKNOWN;   // Should not happen
 729         }
 730
 731         public static function insert(array $item, int $notify = 0, bool $post_local = true)
 732         {
 733                 $orig_item = $item;
 734
 735                 $priority = PRIORITY_HIGH;
 736
 737                 // If it is a posting where users should get notifications, then define it as wall posting
 738                 if ($notify) {
 739                         $item['wall'] = 1;
 740                         $item['origin'] = 1;
 741                         $item['network'] = Protocol::DFRN;
 742                         $item['protocol'] = Conversation::PARCEL_DIRECT;
 743                         $item['direction'] = Conversation::PUSH;
 744
 745                         if (is_int($notify) && in_array($notify, PRIORITIES)) {
 746                                 $priority = $notify;
 747                         }
 748                 } else {
 749                         $item['network'] = trim(($item['network'] ?? '') ?: Protocol::PHANTOM);
 750                 }
 751
 752                 $uid = intval($item['uid']);
 753
 754                 $item['guid'] = self::guid($item, $notify);
 755                 $item['uri'] = substr(trim($item['uri'] ?? '') ?: self::newURI($item['uid'], $item['guid']), 0, 255);
 756
 757                 // Store URI data
 758                 $item['uri-id'] = ItemURI::insert(['uri' => $item['uri'], 'guid' => $item['guid']]);
 759
 760                 // Backward compatibility: parent-uri used to be the direct parent uri.
 761                 // If it is provided without a thr-parent, it probably is the old behavior.
 762                 $item['thr-parent'] = trim($item['thr-parent'] ?? $item['parent-uri'] ?? $item['uri']);
 763                 $item['parent-uri'] = $item['thr-parent'];
 764
 765                 $item['thr-parent-id'] = $item['parent-uri-id'] = ItemURI::getIdByURI($item['thr-parent']);
 766
 767                 // Store conversation data
 768                 $item = Conversation::insert($item);
 769
 770                 /*
 771                  * Do we already have this item?
 772                  * We have to check several networks since Friendica posts could be repeated
 773                  * via OStatus (maybe Diasporsa as well)
 774                  */
 775                 $duplicate = self::getDuplicateID($item);
 776                 if ($duplicate) {
 777                         return $duplicate;
 778                 }
 779
 780                 // Additional duplicate checks
 781                 /// @todo Check why the first duplication check returns the item number and the second a 0
 782                 if (self::isDuplicate($item)) {
 783                         return 0;
 784                 }
 785
 786                 if (!isset($item['post-type'])) {
 787                         $item['post-type'] = empty($item['title']) ? self::PT_NOTE : self::PT_ARTICLE;
 788                 }
 789
 790                 $item['wall']          = intval($item['wall'] ?? 0);
 791                 $item['extid']         = trim($item['extid'] ?? '');
 792                 $item['author-name']   = trim($item['author-name'] ?? '');
 793                 $item['author-link']   = trim($item['author-link'] ?? '');
 794                 $item['author-avatar'] = trim($item['author-avatar'] ?? '');
 795                 $item['owner-name']    = trim($item['owner-name'] ?? '');
 796                 $item['owner-link']    = trim($item['owner-link'] ?? '');
 797                 $item['owner-avatar']  = trim($item['owner-avatar'] ?? '');
 798                 $item['received']      = (isset($item['received'])  ? DateTimeFormat::utc($item['received'])  : DateTimeFormat::utcNow());
 799                 $item['created']       = (isset($item['created'])   ? DateTimeFormat::utc($item['created'])   : $item['received']);
 800                 $item['edited']        = (isset($item['edited'])    ? DateTimeFormat::utc($item['edited'])    : $item['created']);
 801                 $item['changed']       = (isset($item['changed'])   ? DateTimeFormat::utc($item['changed'])   : $item['created']);
 802                 $item['commented']     = (isset($item['commented']) ? DateTimeFormat::utc($item['commented']) : $item['created']);
 803                 $item['title']         = substr(trim($item['title'] ?? ''), 0, 255);
 804                 $item['location']      = trim($item['location'] ?? '');
 805                 $item['coord']         = trim($item['coord'] ?? '');
 806                 $item['visible']       = (isset($item['visible']) ? intval($item['visible']) : 1);
 807                 $item['deleted']       = 0;
 808                 $item['verb']          = trim($item['verb'] ?? '');
 809                 $item['object-type']   = trim($item['object-type'] ?? '');
 810                 $item['object']        = trim($item['object'] ?? '');
 811                 $item['target-type']   = trim($item['target-type'] ?? '');
 812                 $item['target']        = trim($item['target'] ?? '');
 813                 $item['plink']         = substr(trim($item['plink'] ?? ''), 0, 255);
 814                 $item['allow_cid']     = trim($item['allow_cid'] ?? '');
 815                 $item['allow_gid']     = trim($item['allow_gid'] ?? '');
 816                 $item['deny_cid']      = trim($item['deny_cid'] ?? '');
 817                 $item['deny_gid']      = trim($item['deny_gid'] ?? '');
 818                 $item['private']       = intval($item['private'] ?? self::PUBLIC);
 819                 $item['body']          = trim($item['body'] ?? '');
 820                 $item['raw-body']      = trim($item['raw-body'] ?? $item['body']);
 821                 $item['app']           = trim($item['app'] ?? '');
 822                 $item['origin']        = intval($item['origin'] ?? 0);
 823                 $item['postopts']      = trim($item['postopts'] ?? '');
 824                 $item['resource-id']   = trim($item['resource-id'] ?? '');
 825                 $item['event-id']      = intval($item['event-id'] ?? 0);
 826                 $item['inform']        = trim($item['inform'] ?? '');
 827                 $item['file']          = trim($item['file'] ?? '');
 828
 829                 // Communities aren't working with the Diaspora protoccol
 830                 if (($uid != 0) && ($item['network'] == Protocol::DIASPORA)) {
 831                         $user = User::getById($uid, ['account-type']);
 832                         if ($user['account-type'] == Contact::TYPE_COMMUNITY) {
 833                                 Logger::info('Community posts are not supported via Diaspora');
 834                                 return 0;
 835                         }
 836                 }
 837
 838                 // Items cannot be stored before they happen ...
 839                 if ($item['created'] > DateTimeFormat::utcNow()) {
 840                         $item['created'] = DateTimeFormat::utcNow();
 841                 }
 842
 843                 // We haven't invented time travel by now.
 844                 if ($item['edited'] > DateTimeFormat::utcNow()) {
 845                         $item['edited'] = DateTimeFormat::utcNow();
 846                 }
 847
 848                 $item['plink'] = ($item['plink'] ?? '') ?: DI::baseUrl() . '/display/' . urlencode($item['guid']);
 849
 850                 $item['gravity'] = self::getGravity($item);
 851
 852                 $item['language'] = self::getLanguage($item);
 853
 854                 $default = ['url' => $item['author-link'], 'name' => $item['author-name'],
 855                         'photo' => $item['author-avatar'], 'network' => $item['network']];
 856                 $item['author-id'] = ($item['author-id'] ?? 0) ?: Contact::getIdForURL($item['author-link'], 0, null, $default);
 857
 858                 $default = ['url' => $item['owner-link'], 'name' => $item['owner-name'],
 859                         'photo' => $item['owner-avatar'], 'network' => $item['network']];
 860                 $item['owner-id'] = ($item['owner-id'] ?? 0) ?: Contact::getIdForURL($item['owner-link'], 0, null, $default);
 861
 862                 $actor = ($item['gravity'] == GRAVITY_PARENT) ? $item['owner-id'] : $item['author-id'];
 863                 if (!$item['origin'] && ($item['uid'] != 0) && Contact::isSharing($actor, $item['uid'])) {
 864                         $item['post-reason'] = self::PR_FOLLOWER;
 865                 }
 866
 867                 // Ensure that there is an avatar cache
 868                 Contact::checkAvatarCache($item['author-id']);
 869                 Contact::checkAvatarCache($item['owner-id']);
 870
 871                 // The contact-id should be set before "self::insert" was called - but there seems to be issues sometimes
 872                 $item["contact-id"] = self::contactId($item);
 873
 874                 if (!empty($item['direction']) && in_array($item['direction'], [Conversation::PUSH, Conversation::RELAY]) &&
 875                         empty($item['origin']) &&self::isTooOld($item)) {
 876                         Logger::info('Item is too old', ['item' => $item]);
 877                         return 0;
 878                 }
 879
 880                 if (!self::isValid($item)) {
 881                         return 0;
 882                 }
 883
 884                 if ($item['gravity'] !== GRAVITY_PARENT) {
 885                         $toplevel_parent = self::getTopLevelParent($item);
 886                         if (empty($toplevel_parent)) {
 887                                 return 0;
 888                         }
 889
 890                         // If the thread originated from this node, we check the permission against the thread starter
 891                         $condition = ['uri-id' => $toplevel_parent['uri-id'], 'wall' => true];
 892                         $localTopLevelParent = Post::selectFirst(['uid'], $condition);
 893                         if (!empty($localTopLevelParent['uid']) && !self::isAllowedByUser($item, $localTopLevelParent['uid'])) {
 894                                 return 0;
 895                         }
 896
 897                         $parent_id             = $toplevel_parent['id'];
 898                         $item['parent-uri']    = $toplevel_parent['uri'];
 899                         $item['parent-uri-id'] = $toplevel_parent['uri-id'];
 900                         $item['deleted']       = $toplevel_parent['deleted'];
 901
 902                         // Reshares have to keep their permissions to allow forums to work
 903                         if (!$item['origin'] || ($item['verb'] != Activity::ANNOUNCE)) {
 904                                 $item['allow_cid']     = $toplevel_parent['allow_cid'];
 905                                 $item['allow_gid']     = $toplevel_parent['allow_gid'];
 906                                 $item['deny_cid']      = $toplevel_parent['deny_cid'];
 907                                 $item['deny_gid']      = $toplevel_parent['deny_gid'];
 908                         }
 909
 910                         $parent_origin         = $toplevel_parent['origin'];
 911
 912                         // Don't federate received participation messages
 913                         if ($item['verb'] != Activity::FOLLOW) {
 914                                 $item['wall'] = $toplevel_parent['wall'];
 915                         } else {
 916                                 $item['wall'] = false;
 917                                 // Participations are technical messages, so they are set to "seen" automatically
 918                                 $item['unseen'] = false;
 919                         }
 920
 921                         /*
 922                          * If the parent is private, force privacy for the entire conversation
 923                          * This differs from the above settings as it subtly allows comments from
 924                          * email correspondents to be private even if the overall thread is not.
 925                          */
 926                         if ($toplevel_parent['private']) {
 927                                 $item['private'] = $toplevel_parent['private'];
 928                         }
 929
 930                         // If its a post that originated here then tag the thread as "mention"
 931                         if ($item['origin'] && $item['uid']) {
 932                                 DBA::update('post-thread-user', ['mention' => true], ['uri-id' => $item['parent-uri-id'], 'uid' => $item['uid']]);
 933                                 Logger::info('tagged thread as mention', ['parent' => $parent_id, 'parent-uri-id' => $item['parent-uri-id'], 'uid' => $item['uid']]);
 934                         }
 935
 936                         // Update the contact relations
 937                         Contact\Relation::store($toplevel_parent['author-id'], $item['author-id'], $item['created']);
 938                 } else {
 939                         $parent_id = 0;
 940                         $parent_origin = $item['origin'];
 941                 }
 942
 943                 $item['parent-uri-id'] = ItemURI::getIdByURI($item['parent-uri']);
 944                 $item['thr-parent-id'] = ItemURI::getIdByURI($item['thr-parent']);
 945
 946                 // Is this item available in the global items (with uid=0)?
 947                 if ($item["uid"] == 0) {
 948                         $item["global"] = true;
 949
 950                         // Set the global flag on all items if this was a global item entry
 951                         Post::update(['global' => true], ['uri-id' => $item['uri-id']]);
 952                 } else {
 953                         $item['global'] = Post::exists(['uid' => 0, 'uri-id' => $item['uri-id']]);
 954                 }
 955
 956                 // ACL settings
 957                 if (!empty($item["allow_cid"] . $item["allow_gid"] . $item["deny_cid"] . $item["deny_gid"])) {
 958                         $item["private"] = self::PRIVATE;
 959                 }
 960
 961                 if ($notify && $post_local) {
 962                         $item['edit'] = false;
 963                         $item['parent'] = $parent_id;
 964
 965                         // Trigger automatic reactions for addons
 966                         if (!isset($item['api_source'])) {
 967                                 $item['api_source'] = true;
 968                         }
 969
 970                         // We have to tell the hooks who we are - this really should be improved
 971                         if (!local_user()) {
 972                                 $_SESSION['authenticated'] = true;
 973                                 $_SESSION['uid'] = $uid;
 974                                 $dummy_session = true;
 975                         } else {
 976                                 $dummy_session = false;
 977                         }
 978
 979                         Hook::callAll('post_local', $item);
 980
 981                         if ($dummy_session) {
 982                                 unset($_SESSION['authenticated']);
 983                                 unset($_SESSION['uid']);
 984                         }
 985                 } elseif (!$notify) {
 986                         Hook::callAll('post_remote', $item);
 987                 }
 988
 989                 if (!empty($item['cancel'])) {
 990                         Logger::notice('post cancelled by addon.');
 991                         return 0;
 992                 }
 993
 994                 if (empty($item['vid']) && !empty($item['verb'])) {
 995                         $item['vid'] = Verb::getID($item['verb']);
 996                 }
 997
 998                 // Creates or assigns the permission set
 999                 $item['psid'] = DI::permissionSet()->selectOrCreate(
1000                         DI::permissionSetFactory()->createFromString(
1001                                 $item['uid'],
1002                                 $item['allow_cid'],
1003                                 $item['allow_gid'],
1004                                 $item['deny_cid'],
1005                                 $item['deny_gid']
1006                 ))->id;
1007
1008                 if (!empty($item['extid'])) {
1009                         $item['external-id'] = ItemURI::getIdByURI($item['extid']);
1010                 }
1011
1012                 if ($item['verb'] == Activity::ANNOUNCE) {
1013                         self::setOwnerforResharedItem($item);
1014                 }
1015
1016                 if (isset($item['attachments'])) {
1017                         foreach ($item['attachments'] as $attachment) {
1018                                 $attachment['uri-id'] = $item['uri-id'];
1019                                 Post\Media::insert($attachment);
1020                         }
1021                         unset($item['attachments']);
1022                 }
1023
1024                 Post\Media::insertFromAttachmentData($item['uri-id'], $item['body']);
1025
1026                 // Remove all media attachments from the body and store them in the post-media table
1027                 $item['raw-body'] = Post\Media::insertFromBody($item['uri-id'], $item['raw-body']);
1028                 $item['raw-body'] = self::setHashtags($item['raw-body']);
1029
1030                 if (!DBA::exists('contact', ['id' => $item['author-id'], 'network' => Protocol::DFRN])) {
1031                         Post\Media::insertFromRelevantUrl($item['uri-id'], $item['raw-body']);
1032                 }
1033
1034                 // Check for hashtags in the body and repair or add hashtag links
1035                 $item['body'] = self::setHashtags($item['body']);
1036
1037                 if (stristr($item['verb'], Activity::POKE)) {
1038                         $notify_type = Delivery::POKE;
1039                 } else {
1040                         $notify_type = Delivery::POST;
1041                 }
1042
1043                 // Filling item related side tables
1044                 if (!empty($item['attach'])) {
1045                         Post\Media::insertFromAttachment($item['uri-id'], $item['attach']);
1046                 }
1047
1048                 if (empty($item['event-id'])) {
1049                         unset($item['event-id']);
1050
1051                         $ev = Event::fromBBCode($item['body']);
1052                         if ((!empty($ev['desc']) || !empty($ev['summary'])) && !empty($ev['start'])) {
1053                                 Logger::info('Event found.');
1054                                 $ev['cid']       = $item['contact-id'];
1055                                 $ev['uid']       = $item['uid'];
1056                                 $ev['uri']       = $item['uri'];
1057                                 $ev['edited']    = $item['edited'];
1058                                 $ev['private']   = $item['private'];
1059                                 $ev['guid']      = $item['guid'];
1060                                 $ev['plink']     = $item['plink'];
1061                                 $ev['network']   = $item['network'];
1062                                 $ev['protocol']  = $item['protocol'] ?? Conversation::PARCEL_UNKNOWN;
1063                                 $ev['direction'] = $item['direction'] ?? Conversation::UNKNOWN;
1064                                 $ev['source']    = $item['source'] ?? '';
1065
1066                                 $event = DBA::selectFirst('event', ['id'], ['uri' => $item['uri'], 'uid' => $item['uid']]);
1067                                 if (DBA::isResult($event)) {
1068                                         $ev['id'] = $event['id'];
1069                                 }
1070
1071                                 $event_id = Event::store($ev);
1072                                 $item = Event::getItemArrayForImportedId($event_id, $item);
1073
1074                                 Logger::info('Event was stored', ['id' => $event_id]);
1075                         }
1076                 }
1077
1078                 if (empty($item['causer-id'])) {
1079                         unset($item['causer-id']);
1080                 }
1081
1082                 if (in_array($item['network'], [Protocol::ACTIVITYPUB, Protocol::DFRN])) {
1083                         $content_warning = BBCode::getAbstract($item['body'], Protocol::ACTIVITYPUB);
1084                         if (!empty($content_warning) && empty($item['content-warning'])) {
1085                                 $item['content-warning'] = BBCode::toPlaintext($content_warning);
1086                         }
1087                 }
1088
1089                 Post::insert($item['uri-id'], $item);
1090
1091                 if ($item['gravity'] == GRAVITY_PARENT) {
1092                         Post\Thread::insert($item['uri-id'], $item);
1093                 }
1094
1095                 if (!in_array($item['verb'], self::ACTIVITIES)) {
1096                         Post\Content::insert($item['uri-id'], $item);
1097                 }
1098
1099                 // Create Diaspora signature
1100                 if ($item['origin'] && empty($item['diaspora_signed_text']) && ($item['gravity'] != GRAVITY_PARENT)) {
1101                         $signed = Diaspora::createCommentSignature($item);
1102                         if (!empty($signed)) {
1103                                 $item['diaspora_signed_text'] = json_encode($signed);
1104                         }
1105                 }
1106
1107                 if (!empty($item['diaspora_signed_text'])) {
1108                         DBA::replace('diaspora-interaction', ['uri-id' => $item['uri-id'], 'interaction' => $item['diaspora_signed_text']]);
1109                 }
1110
1111                 // Attached file links
1112                 if (!empty($item['file'])) {
1113                         Post\Category::storeTextByURIId($item['uri-id'], $item['uid'], $item['file']);
1114                 }
1115
1116                 // Delivery relevant data
1117                 $delivery_data = Post\DeliveryData::extractFields($item);
1118
1119                 if (!empty($item['origin']) || !empty($item['wall']) || !empty($delivery_data['postopts']) || !empty($delivery_data['inform'])) {
1120                         Post\DeliveryData::insert($item['uri-id'], $delivery_data);
1121                 }
1122
1123                 // Store tags from the body if this hadn't been handled previously in the protocol classes
1124                 if (!Tag::existsForPost($item['uri-id'])) {
1125                         Tag::storeFromBody($item['uri-id'], $item['body']);
1126                 }
1127
1128                 $condition = ['uri-id' => $item['uri-id'], 'uid' => $item['uid']];
1129                 if (Post::exists($condition)) {
1130                         Logger::notice('Item is already inserted - aborting', $condition);
1131                         return 0;
1132                 }
1133
1134                 $post_user_id = Post\User::insert($item['uri-id'], $item['uid'], $item);
1135                 if (!$post_user_id) {
1136                         Logger::notice('Post-User is already inserted - aborting', ['uid' => $item['uid'], 'uri-id' => $item['uri-id']]);
1137                         return 0;
1138                 }
1139
1140                 if ($item['gravity'] == GRAVITY_PARENT) {
1141                         $item['post-user-id'] = $post_user_id;
1142                         Post\ThreadUser::insert($item['uri-id'], $item['uid'], $item);
1143                 }
1144
1145                 Logger::notice('created item', ['post-id' => $post_user_id, 'uid' => $item['uid'], 'network' => $item['network'], 'uri-id' => $item['uri-id'], 'guid' => $item['guid']]);
1146
1147                 $posted_item = Post::selectFirst(self::ITEM_FIELDLIST, ['post-user-id' => $post_user_id]);
1148                 if (!DBA::isResult($posted_item)) {
1149                         // On failure store the data into a spool file so that the "SpoolPost" worker can try again later.
1150                         Logger::warning('Could not store item. it will be spooled', ['id' => $post_user_id]);
1151                         self::spool($orig_item);
1152                         return 0;
1153                 }
1154
1155                 // update the commented timestamp on the parent
1156                 if (DI::config()->get('system', 'like_no_comment')) {
1157                         // Update when it is a comment
1158                         $update_commented = in_array($posted_item['gravity'], [GRAVITY_PARENT, GRAVITY_COMMENT]);
1159                 } else {
1160                         // Update when it isn't a follow or tag verb
1161                         $update_commented = !in_array($posted_item['verb'], [Activity::FOLLOW, Activity::TAG]);
1162                 }
1163
1164                 if ($update_commented) {
1165                         $fields = ['commented' => DateTimeFormat::utcNow(), 'changed' => DateTimeFormat::utcNow()];
1166                 } else {
1167                         $fields = ['changed' => DateTimeFormat::utcNow()];
1168                 }
1169
1170                 Post::update($fields, ['uri-id' => $posted_item['parent-uri-id'], 'uid' => $posted_item['uid']]);
1171
1172                 // In that function we check if this is a forum post. Additionally we delete the item under certain circumstances
1173                 if (self::tagDeliver($posted_item['uid'], $post_user_id)) {
1174                         // Get the user information for the logging
1175                         $user = User::getById($uid);
1176
1177                         Logger::notice('Item had been deleted', ['id' => $post_user_id, 'user' => $uid, 'account-type' => $user['account-type']]);
1178                         return 0;
1179                 }
1180
1181                 if ($notify) {
1182                         if (!\Friendica\Content\Feature::isEnabled($posted_item['uid'], 'explicit_mentions') && ($posted_item['gravity'] == GRAVITY_COMMENT)) {
1183                                 Tag::createImplicitMentions($posted_item['uri-id'], $posted_item['thr-parent-id']);
1184                         }
1185                         Hook::callAll('post_local_end', $posted_item);
1186                 } else {
1187                         Hook::callAll('post_remote_end', $posted_item);
1188                 }
1189
1190                 if ($posted_item['gravity'] === GRAVITY_PARENT) {
1191                         self::addShadow($post_user_id);
1192                 } else {
1193                         self::addShadowPost($post_user_id);
1194                 }
1195
1196                 self::updateContact($posted_item);
1197
1198                 Post\UserNotification::setNotification($posted_item['uri-id'], $posted_item['uid']);
1199
1200                 // Distribute items to users who subscribed to their tags
1201                 self::distributeByTags($posted_item);
1202
1203                 // Automatically reshare the item if the "remote_self" option is selected
1204                 self::autoReshare($posted_item);
1205
1206                 $transmit = $notify || ($posted_item['visible'] && ($parent_origin || $posted_item['origin']));
1207
1208                 if ($transmit) {
1209                         // Don't relay participation messages
1210                         if (($posted_item['verb'] == Activity::FOLLOW) &&
1211                                 (!$posted_item['origin'] || ($posted_item['author-id'] != Contact::getPublicIdByUserId($uid)))) {
1212                                 Logger::info('Participation messages will not be relayed', ['item' => $posted_item['id'], 'uri' => $posted_item['uri'], 'verb' => $posted_item['verb']]);
1213                                 $transmit = false;
1214                         }
1215                 }
1216
1217                 if ($transmit) {
1218                         Worker::add(['priority' => $priority, 'dont_fork' => true], 'Notifier', $notify_type, (int)$posted_item['uri-id'], (int)$posted_item['uid']);
1219                 }
1220
1221                 // Fill the cache with the rendered content.
1222                 if (in_array($posted_item['gravity'], [GRAVITY_PARENT, GRAVITY_COMMENT]) && ($posted_item['uid'] == 0)) {
1223                         self::updateDisplayCache($posted_item['uri-id']);
1224                 }
1225
1226                 if ($posted_item['origin'] && ($posted_item['uid'] != 0) && in_array($posted_item['gravity'], [GRAVITY_PARENT, GRAVITY_COMMENT])) {
1227                         DI::cache()->delete(ActivityPub\Transmitter::CACHEKEY_OUTBOX . $posted_item['uid']);
1228                         DI::cache()->delete(ActivityPub\Transmitter::CACHEKEY_PROFILE . $posted_item['uid']);
1229                 }
1230
1231                 return $post_user_id;
1232         }
1233
1234         /**
1235          * Update the display cache
1236          *
1237          * @param integer $uri_id
1238          * @return void
1239          */
1240         public static function updateDisplayCache(int $uri_id)
1241         {
1242                 $item = Post::selectFirst(self::DISPLAY_FIELDLIST, ['uri-id' => $uri_id]);
1243                 self::prepareBody($item, false, false, true);
1244         }
1245
1246         /**
1247          * Change the owner of a parent item if it had been shared by a forum
1248          *
1249          * (public) forum posts in the new format consist of the regular post by the author
1250          * followed by an announce message sent from the forum account.
1251          * Changing the owner helps in grouping forum posts.
1252          *
1253          * @param array $item
1254          * @return void
1255          */
1256         private static function setOwnerforResharedItem(array $item)
1257         {
1258                 $parent = Post::selectFirst(['id', 'causer-id', 'owner-id', 'author-id', 'author-link', 'origin', 'post-reason'],
1259                         ['uri-id' => $item['thr-parent-id'], 'uid' => $item['uid']]);
1260                 if (!DBA::isResult($parent)) {
1261                         Logger::error('Parent not found', ['uri-id' => $item['thr-parent-id'], 'uid' => $item['uid']]);
1262                         return;
1263                 }
1264
1265                 $author = Contact::selectFirst(['url', 'contact-type', 'network'], ['id' => $item['author-id']]);
1266                 if (!DBA::isResult($author)) {
1267                         Logger::error('Author not found', ['id' => $item['author-id']]);
1268                         return;
1269                 }
1270
1271                 $self_contact = Contact::selectFirst(['id'], ['uid' => $item['uid'], 'self' => true]);
1272                 $self = !empty($self_contact) ? $self_contact['id'] : 0;
1273
1274                 $cid = Contact::getIdForURL($author['url'], $item['uid']);
1275                 if (empty($cid) || (!Contact::isSharing($cid, $item['uid']) && ($cid != $self))) {
1276                         Logger::info('The resharer is not a following contact: quit', ['resharer' => $author['url'], 'uid' => $item['uid'], 'cid' => $cid]);
1277                         return;
1278                 }
1279
1280                 if ($author['contact-type'] != Contact::TYPE_COMMUNITY) {
1281                         if ($parent['post-reason'] == self::PR_ANNOUNCEMENT) {
1282                                 Logger::info('The parent is already marked as announced: quit', ['causer' => $parent['causer-id'], 'owner' => $parent['owner-id'], 'author' => $parent['author-id'], 'uid' => $item['uid']]);
1283                                 return;
1284                         }
1285
1286                         if (Contact::isSharing($parent['owner-id'], $item['uid'])) {
1287                                 Logger::info('The resharer is no forum: quit', ['resharer' => $item['author-id'], 'owner' => $parent['owner-id'], 'author' => $parent['author-id'], 'uid' => $item['uid']]);
1288                                 return;
1289                         }
1290                 }
1291
1292                 self::update(['post-reason' => self::PR_ANNOUNCEMENT, 'causer-id' => $item['author-id']], ['id' => $parent['id']]);
1293                 Logger::info('Set announcement post-reason', ['uri-id' => $item['uri-id'], 'thr-parent-id' => $item['thr-parent-id'], 'uid' => $item['uid']]);
1294         }
1295
1296         /**
1297          * Distribute the given item to users who subscribed to their tags
1298          *
1299          * @param array $item     Processed item
1300          */
1301         private static function distributeByTags(array $item)
1302         {
1303                 if (($item['uid'] != 0) || ($item['gravity'] != GRAVITY_PARENT) || !in_array($item['network'], Protocol::FEDERATED)) {
1304                         return;
1305                 }
1306
1307                 $uids = Tag::getUIDListByURIId($item['uri-id']);
1308                 foreach ($uids as $uid) {
1309                         if (Contact::isSharing($item['author-id'], $uid)) {
1310                                 $fields = [];
1311                         } else {
1312                                 $fields = ['post-reason' => self::PR_TAG];
1313                         }
1314
1315                         $stored = self::storeForUserByUriId($item['uri-id'], $uid, $fields);
1316                         Logger::info('Stored item for users', ['uri-id' => $item['uri-id'], 'uid' => $uid, 'fields' => $fields, 'stored' => $stored]);
1317                 }
1318         }
1319
1320         /**
1321          * Distributes public items to the receivers
1322          *
1323          * @param integer $itemid      Item ID that should be added
1324          * @param string  $signed_text Original text (for Diaspora signatures), JSON encoded.
1325          * @throws \Exception
1326          */
1327         public static function distribute($itemid, $signed_text = '')
1328         {
1329                 $condition = ["`id` IN (SELECT `parent` FROM `post-user-view` WHERE `id` = ?)", $itemid];
1330                 $parent = Post::selectFirst(['owner-id'], $condition);
1331                 if (!DBA::isResult($parent)) {
1332                         Logger::warning('Item not found', ['condition' => $condition]);
1333                         return;
1334                 }
1335
1336                 // Only distribute public items from native networks
1337                 $condition = ['id' => $itemid, 'uid' => 0,
1338                         'network' => array_merge(Protocol::FEDERATED ,['']),
1339                         'visible' => true, 'deleted' => false, 'private' => [self::PUBLIC, self::UNLISTED]];
1340                 $item = Post::selectFirst(self::ITEM_FIELDLIST, $condition);
1341                 if (!DBA::isResult($item)) {
1342                         Logger::warning('Item not found', ['condition' => $condition]);
1343                         return;
1344                 }
1345
1346                 $origin = $item['origin'];
1347
1348                 $users = [];
1349
1350                 /// @todo add a field "pcid" in the contact table that referrs to the public contact id.
1351                 $owner = DBA::selectFirst('contact', ['url', 'nurl', 'alias'], ['id' => $parent['owner-id']]);
1352                 if (!DBA::isResult($owner)) {
1353                         return;
1354                 }
1355
1356                 $condition = ['nurl' => $owner['nurl'], 'rel' => [Contact::SHARING, Contact::FRIEND]];
1357                 $contacts = DBA::select('contact', ['uid'], $condition);
1358                 while ($contact = DBA::fetch($contacts)) {
1359                         if ($contact['uid'] == 0) {
1360                                 continue;
1361                         }
1362
1363                         $users[$contact['uid']] = $contact['uid'];
1364                 }
1365                 DBA::close($contacts);
1366
1367                 $condition = ['alias' => $owner['url'], 'rel' => [Contact::SHARING, Contact::FRIEND]];
1368                 $contacts = DBA::select('contact', ['uid'], $condition);
1369                 while ($contact = DBA::fetch($contacts)) {
1370                         if ($contact['uid'] == 0) {
1371                                 continue;
1372                         }
1373
1374                         $users[$contact['uid']] = $contact['uid'];
1375                 }
1376                 DBA::close($contacts);
1377
1378                 if (!empty($owner['alias'])) {
1379                         $condition = ['nurl' => Strings::normaliseLink($owner['alias']), 'rel' => [Contact::SHARING, Contact::FRIEND]];
1380                         $contacts = DBA::select('contact', ['uid'], $condition);
1381                         while ($contact = DBA::fetch($contacts)) {
1382                                 if ($contact['uid'] == 0) {
1383                                         continue;
1384                                 }
1385
1386                                 $users[$contact['uid']] = $contact['uid'];
1387                         }
1388                         DBA::close($contacts);
1389                 }
1390
1391                 $origin_uid = 0;
1392
1393                 if ($item['uri-id'] != $item['parent-uri-id']) {
1394                         $parents = Post::select(['uid', 'origin'], ["`uri-id` = ? AND `uid` != 0", $item['parent-uri-id']]);
1395                         while ($parent = Post::fetch($parents)) {
1396                                 $users[$parent['uid']] = $parent['uid'];
1397                                 if ($parent['origin'] && !$origin) {
1398                                         $origin_uid = $parent['uid'];
1399                                 }
1400                         }
1401                         DBA::close($parents);
1402                 }
1403
1404                 foreach ($users as $uid) {
1405                         if ($origin_uid == $uid) {
1406                                 $item['diaspora_signed_text'] = $signed_text;
1407                         }
1408                         self::storeForUser($item, $uid);
1409                 }
1410         }
1411
1412         /**
1413          * Store a public item defined by their URI-ID for the given users
1414          *
1415          * @param integer $uri_id     URI-ID of the given item
1416          * @param integer $uid        The user that will receive the item entry
1417          * @param array   $fields     Additional fields to be stored
1418          * @param integer $source_uid User id of the source post
1419          * @return integer stored item id
1420          */
1421         public static function storeForUserByUriId(int $uri_id, int $uid, array $fields = [], int $source_uid = 0)
1422         {
1423                 if ($uid == $source_uid) {
1424                         Logger::warning('target UID must not be be equal to the source UID', ['uri-id' => $uri_id, 'uid' => $uid]);
1425                         return 0;
1426                 }
1427
1428                 $item = Post::selectFirst(self::ITEM_FIELDLIST, ['uri-id' => $uri_id, 'uid' => $source_uid]);
1429                 if (!DBA::isResult($item)) {
1430                         Logger::warning('Item could not be fetched', ['uri-id' => $uri_id, 'uid' => $source_uid]);
1431                         return 0;
1432                 }
1433
1434                 if (($source_uid == 0) && (($item['private'] == self::PRIVATE) || !in_array($item['network'], Protocol::FEDERATED))) {
1435                         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']]);
1436                         return 0;
1437                 }
1438
1439                 $item['post-reason'] = self::PR_STORED;
1440
1441                 $item = array_merge($item, $fields);
1442
1443                 $is_reshare = ($item['gravity'] == GRAVITY_ACTIVITY) && ($item['verb'] == Activity::ANNOUNCE);
1444
1445                 if ((($item['gravity'] == GRAVITY_PARENT) || $is_reshare) &&
1446                         DI::pConfig()->get($uid, 'system', 'accept_only_sharer') == self::COMPLETION_NONE &&
1447                         !Contact::isSharingByURL($item['author-link'], $uid) &&
1448                         !Contact::isSharingByURL($item['owner-link'], $uid)) {
1449                         Logger::info('Contact is not a follower, thread will not be stored', ['author' => $item['author-link'], 'uid' => $uid]);
1450                         return 0;
1451                 }
1452
1453                 if (($uri_id != $item['thr-parent-id']) && (($item['gravity'] == GRAVITY_COMMENT) || $is_reshare) && !Post::exists(['uri-id' => $item['thr-parent-id'], 'uid' => $uid])) {
1454                         // Fetch the origin user for the post
1455                         $origin_uid = self::GetOriginUidForUriId($item['thr-parent-id'], $uid);
1456                         if (is_null($origin_uid)) {
1457                                 Logger::info('Origin item was not found', ['uid' => $uid, 'uri-id' => $item['thr-parent-id']]);
1458                                 return 0;
1459                         }
1460
1461                         $causer = $item['causer-id'] ?: $item['author-id'];
1462                         $result = self::storeForUserByUriId($item['thr-parent-id'], $uid, ['causer-id' => $causer, 'post-reason' => self::PR_FETCHED], $origin_uid);
1463                         Logger::info('Fetched thread parent', ['uri-id' => $item['thr-parent-id'], 'uid' => $uid, 'causer' => $causer, 'result' => $result]);
1464                 }
1465
1466                 $stored = self::storeForUser($item, $uid);
1467                 Logger::info('Item stored for user', ['uri-id' => $item['uri-id'], 'uid' => $uid, 'source-uid' => $source_uid, 'stored' => $stored]);
1468                 return $stored;
1469         }
1470
1471         /**
1472          * Returns the origin uid of a post if the given user is allowed to see it.
1473          *
1474          * @param int $uriid
1475          * @param int $uid
1476          * @return int
1477          */
1478         private static function GetOriginUidForUriId(int $uriid, int $uid)
1479         {
1480                 if (Post::exists(['uri-id' => $uriid, 'uid' => $uid])) {
1481                         return $uid;
1482                 }
1483
1484                 $post = Post::selectFirst(['uid', 'allow_cid', 'allow_gid', 'deny_cid', 'deny_gid', 'private'], ['uri-id' => $uriid, 'origin' => true]);
1485                 if (!empty($post)) {
1486                         if (in_array($post['private'], [Item::PUBLIC, Item::UNLISTED])) {
1487                                 return $post['uid'];
1488                         }
1489
1490                         $pcid = Contact::getPublicIdByUserId($uid);
1491                         if (empty($pcid)) {
1492                                 return null;
1493                         }
1494
1495                         foreach (Item::enumeratePermissions($post, true) as $receiver) {
1496                                 if ($receiver == $pcid) {
1497                                         return $post['uid'];
1498                                 }
1499                         }
1500
1501                         return null;
1502                 }
1503
1504                 if (Post::exists(['uri-id' => $uriid, 'uid' => 0])) {
1505                         return 0;
1506                 }
1507
1508                 // When the post belongs to a a forum then all forum users are allowed to access it
1509                 foreach (Tag::getByURIId($uriid, [Tag::MENTION, Tag::EXCLUSIVE_MENTION]) as $tag) {
1510                         if (DBA::exists('contact', ['uid' => $uid, 'nurl' => Strings::normaliseLink($tag['url']), 'contact-type' => Contact::TYPE_COMMUNITY])) {
1511                                 $target_uid = User::getIdForURL($tag['url']);
1512                                 if (!empty($target_uid)) {
1513                                         return $target_uid;
1514                                 }
1515                         }
1516                 }
1517
1518                 return null;
1519         }
1520
1521         /**
1522          * Store a public item array for the given users
1523          *
1524          * @param array   $item   The item entry that will be stored
1525          * @param integer $uid    The user that will receive the item entry
1526          * @return integer stored item id
1527          * @throws \Exception
1528          */
1529         private static function storeForUser(array $item, int $uid)
1530         {
1531                 if (Post::exists(['uri-id' => $item['uri-id'], 'uid' => $uid])) {
1532                         if (!empty($item['event-id'])) {
1533                                 $post = Post::selectFirst(['event-id'], ['uri-id' => $item['uri-id'], 'uid' => $uid]);
1534                                 if (!empty($post['event-id'])) {
1535                                         $event = DBA::selectFirst('event', ['edited', 'start', 'finish', 'summary', 'desc', 'location', 'nofinish', 'adjust'], ['id' => $item['event-id']]);
1536                                         if (!empty($event)) {
1537                                                 // We aren't using "Event::store" here, since we don't want to trigger any further action
1538                                                 $ret = DBA::update('event', $event, ['id' => $post['event-id']]);
1539                                                 Logger::info('Event updated', ['uid' => $uid, 'source-event' => $item['event-id'], 'target-event' => $post['event-id'], 'ret' => $ret]);
1540                                         }
1541                                 }
1542                         }
1543                         Logger::info('Item already exists', ['uri-id' => $item['uri-id'], 'uid' => $uid]);
1544                         return 0;
1545                 }
1546
1547                 // Data from the "post-user" table
1548                 unset($item['id']);
1549                 unset($item['mention']);
1550                 unset($item['starred']);
1551                 unset($item['unseen']);
1552                 unset($item['psid']);
1553                 unset($item['pinned']);
1554                 unset($item['ignored']);
1555                 unset($item['pubmail']);
1556                 unset($item['event-id']);
1557                 unset($item['hidden']);
1558                 unset($item['notification-type']);
1559                 unset($item['post-reason']);
1560
1561                 // Data from the "post-delivery-data" table
1562                 unset($item['postopts']);
1563                 unset($item['inform']);
1564
1565                 $item['uid'] = $uid;
1566                 $item['origin'] = 0;
1567                 $item['wall'] = 0;
1568
1569                 if ($item['gravity'] == GRAVITY_PARENT) {
1570                         $contact = Contact::getByURLForUser($item['owner-link'], $uid, false, ['id']);
1571                 } else {
1572                         $contact = Contact::getByURLForUser($item['author-link'], $uid, false, ['id']);
1573                 }
1574
1575                 if (!empty($contact['id'])) {
1576                         $item['contact-id'] = $contact['id'];
1577                 } else {
1578                         // Shouldn't happen at all
1579                         Logger::warning('contact-id could not be fetched', ['uid' => $uid, 'item' => $item]);
1580                         $self = DBA::selectFirst('contact', ['id'], ['self' => true, 'uid' => $uid]);
1581                         if (!DBA::isResult($self)) {
1582                                 // Shouldn't happen even less
1583                                 Logger::warning('self contact could not be fetched', ['uid' => $uid, 'item' => $item]);
1584                                 return 0;
1585                         }
1586                         $item['contact-id'] = $self['id'];
1587                 }
1588
1589                 $notify = false;
1590                 if ($item['gravity'] == GRAVITY_PARENT) {
1591                         $contact = DBA::selectFirst('contact', [], ['id' => $item['contact-id'], 'self' => false]);
1592                         if (DBA::isResult($contact)) {
1593                                 $notify = self::isRemoteSelf($contact, $item);
1594                         }
1595                 }
1596
1597                 $distributed = self::insert($item, $notify);
1598
1599                 if (!$distributed) {
1600                         Logger::info("Distributed item wasn't stored", ['uri-id' => $item['uri-id'], 'user' => $uid]);
1601                 } else {
1602                         Logger::info('Distributed item was stored', ['uri-id' => $item['uri-id'], 'user' => $uid, 'stored' => $distributed]);
1603                 }
1604                 return $distributed;
1605         }
1606
1607         /**
1608          * Add a shadow entry for a given item id that is a thread starter
1609          *
1610          * We store every public item entry additionally with the user id "0".
1611          * This is used for the community page and for the search.
1612          * It is planned that in the future we will store public item entries only once.
1613          *
1614          * @param integer $itemid Item ID that should be added
1615          * @throws \Exception
1616          */
1617         private static function addShadow($itemid)
1618         {
1619                 $fields = ['uid', 'private', 'visible', 'deleted', 'network', 'uri-id'];
1620                 $condition = ['id' => $itemid, 'gravity' => GRAVITY_PARENT];
1621                 $item = Post::selectFirst($fields, $condition);
1622
1623                 if (!DBA::isResult($item)) {
1624                         return;
1625                 }
1626
1627                 // is it already a copy?
1628                 if (($itemid == 0) || ($item['uid'] == 0)) {
1629                         return;
1630                 }
1631
1632                 // Is it a visible public post?
1633                 if (!$item["visible"] || $item["deleted"]  || ($item["private"] == self::PRIVATE)) {
1634                         return;
1635                 }
1636
1637                 // is it an entry from a connector? Only add an entry for natively connected networks
1638                 if (!in_array($item["network"], array_merge(Protocol::FEDERATED ,['']))) {
1639                         return;
1640                 }
1641
1642                 if (Post::exists(['uri-id' => $item['uri-id'], 'uid' => 0])) {
1643                         return;
1644                 }
1645
1646                 $item = Post::selectFirst(self::ITEM_FIELDLIST, ['id' => $itemid]);
1647
1648                 if (DBA::isResult($item)) {
1649                         // Preparing public shadow (removing user specific data)
1650                         $item['uid'] = 0;
1651                         unset($item['id']);
1652                         unset($item['parent']);
1653                         unset($item['wall']);
1654                         unset($item['mention']);
1655                         unset($item['origin']);
1656                         unset($item['starred']);
1657                         unset($item['postopts']);
1658                         unset($item['inform']);
1659                         unset($item['post-reason']);
1660                         if ($item['uri-id'] == $item['parent-uri-id']) {
1661                                 $item['contact-id'] = $item['owner-id'];
1662                         } else {
1663                                 $item['contact-id'] = $item['author-id'];
1664                         }
1665
1666                         $public_shadow = self::insert($item);
1667
1668                         Logger::info('Stored public shadow', ['thread' => $itemid, 'id' => $public_shadow]);
1669                 }
1670         }
1671
1672         /**
1673          * Add a shadow entry for a given item id that is a comment
1674          *
1675          * This function does the same like the function above - but for comments
1676          *
1677          * @param integer $itemid Item ID that should be added
1678          * @throws \Exception
1679          */
1680         private static function addShadowPost($itemid)
1681         {
1682                 $item = Post::selectFirst(self::ITEM_FIELDLIST, ['id' => $itemid]);
1683                 if (!DBA::isResult($item)) {
1684                         return;
1685                 }
1686
1687                 // Is it a toplevel post?
1688                 if ($item['gravity'] == GRAVITY_PARENT) {
1689                         self::addShadow($itemid);
1690                         return;
1691                 }
1692
1693                 // Is this a shadow entry?
1694                 if ($item['uid'] == 0) {
1695                         return;
1696                 }
1697
1698                 // Is there a shadow parent?
1699                 if (!Post::exists(['uri-id' => $item['parent-uri-id'], 'uid' => 0])) {
1700                         return;
1701                 }
1702
1703                 // Is there already a shadow entry?
1704                 if (Post::exists(['uri-id' => $item['uri-id'], 'uid' => 0])) {
1705                         return;
1706                 }
1707
1708                 // Save "origin" and "parent" state
1709                 $origin = $item['origin'];
1710                 $parent = $item['parent'];
1711
1712                 // Preparing public shadow (removing user specific data)
1713                 $item['uid'] = 0;
1714                 unset($item['id']);
1715                 unset($item['parent']);
1716                 unset($item['wall']);
1717                 unset($item['mention']);
1718                 unset($item['origin']);
1719                 unset($item['starred']);
1720                 unset($item['postopts']);
1721                 unset($item['inform']);
1722                 unset($item['post-reason']);
1723                 $item['contact-id'] = Contact::getIdForURL($item['author-link']);
1724
1725                 $public_shadow = self::insert($item);
1726
1727                 Logger::info('Stored public shadow', ['uri-id' => $item['uri-id'], 'id' => $public_shadow]);
1728
1729                 // If this was a comment to a Diaspora post we don't get our comment back.
1730                 // This means that we have to distribute the comment by ourselves.
1731                 if ($origin && Post::exists(['id' => $parent, 'network' => Protocol::DIASPORA])) {
1732                         self::distribute($public_shadow);
1733                 }
1734         }
1735
1736         /**
1737          * Adds a language specification in a "language" element of given $arr.
1738          * Expects "body" element to exist in $arr.
1739          *
1740          * @param array $item
1741          * @return string detected language
1742          * @throws \Text_LanguageDetect_Exception
1743          */
1744         private static function getLanguage(array $item)
1745         {
1746                 if (!empty($item['language'])) {
1747                         return $item['language'];
1748                 }
1749
1750                 if (!in_array($item['gravity'], [GRAVITY_PARENT, GRAVITY_COMMENT]) || empty($item['body'])) {
1751                         return '';
1752                 }
1753
1754                 // Convert attachments to links
1755                 $naked_body = BBCode::removeAttachment($item['body']);
1756                 if (empty($naked_body)) {
1757                         return '';
1758                 }
1759
1760                 // Remove links and pictures
1761                 $naked_body = BBCode::removeLinks($naked_body);
1762
1763                 // Convert the title and the body to plain text
1764                 $naked_body = trim($item['title'] . "\n" . BBCode::toPlaintext($naked_body));
1765
1766                 // Remove possibly remaining links
1767                 $naked_body = preg_replace(Strings::autoLinkRegEx(), '', $naked_body);
1768
1769                 if (empty($naked_body)) {
1770                         return '';
1771                 }
1772
1773                 $availableLanguages = DI::l10n()->getAvailableLanguages();
1774                 // See https://github.com/friendica/friendica/issues/10511
1775                 // Persian is manually added to language detection until a persian translation is provided for the interface, at
1776                 // which point it will be automatically available through `getAvailableLanguages()` and this should be removed.
1777                 $availableLanguages['fa'] = 'fa';
1778
1779                 $ld = new Language(array_keys($availableLanguages));
1780                 $languages = $ld->detect($naked_body)->limit(0, 3)->close();
1781                 if (is_array($languages)) {
1782                         return json_encode($languages);
1783                 }
1784
1785                 return '';
1786         }
1787
1788         public static function getLanguageMessage(array $item)
1789         {
1790                 $iso639 = new \Matriphe\ISO639\ISO639;
1791
1792                 $used_languages = '';
1793                 foreach (json_decode($item['language'], true) as $language => $reliability) {
1794                         $used_languages .= $iso639->languageByCode1($language) . ' (' . $language . "): " . number_format($reliability, 5) . '\n';
1795                 }
1796                 $used_languages = DI::l10n()->t('Detected languages in this post:\n%s', $used_languages);
1797                 return $used_languages;
1798         }
1799
1800         /**
1801          * Creates an unique guid out of a given uri.
1802          * This function is used for messages outside the fediverse (Connector posts, feeds, Mails, ...)
1803          * Posts that are created on this system are using System::createUUID.
1804          * Received ActivityPub posts are using Processor::getGUIDByURL.
1805          *
1806          * @param string $uri uri of an item entry
1807          * @param string $host hostname for the GUID prefix
1808          * @return string unique guid
1809          */
1810         public static function guidFromUri($uri, $host)
1811         {
1812                 // Our regular guid routine is using this kind of prefix as well
1813                 // We have to avoid that different routines could accidentally create the same value
1814                 $parsed = parse_url($uri);
1815
1816                 // Remove the scheme to make sure that "https" and "http" doesn't make a difference
1817                 unset($parsed["scheme"]);
1818
1819                 // Glue it together to be able to make a hash from it
1820                 $host_id = implode("/", $parsed);
1821
1822                 // Use a mixture of several hashes to provide some GUID like experience
1823                 return hash("crc32", $host) . '-'. hash('joaat', $host_id) . '-'. hash('fnv164', $host_id);
1824         }
1825
1826         /**
1827          * generate an unique URI
1828          *
1829          * @param integer $uid  User id
1830          * @param string  $guid An existing GUID (Otherwise it will be generated)
1831          *
1832          * @return string
1833          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1834          */
1835         public static function newURI($uid, $guid = "")
1836         {
1837                 if ($guid == "") {
1838                         $guid = System::createUUID();
1839                 }
1840
1841                 return DI::baseUrl()->get() . '/objects/' . $guid;
1842         }
1843
1844         /**
1845          * Set "success_update" and "last-item" to the date of the last time we heard from this contact
1846          *
1847          * This can be used to filter for inactive contacts.
1848          * Only do this for public postings to avoid privacy problems, since poco data is public.
1849          * Don't set this value if it isn't from the owner (could be an author that we don't know)
1850          *
1851          * @param array $arr Contains the just posted item record
1852          * @throws \Exception
1853          */
1854         private static function updateContact($arr)
1855         {
1856                 // Unarchive the author
1857                 $contact = DBA::selectFirst('contact', [], ['id' => $arr["author-id"]]);
1858                 if (DBA::isResult($contact)) {
1859                         Contact::unmarkForArchival($contact);
1860                 }
1861
1862                 // Unarchive the contact if it's not our own contact
1863                 $contact = DBA::selectFirst('contact', [], ['id' => $arr["contact-id"], 'self' => false]);
1864                 if (DBA::isResult($contact)) {
1865                         Contact::unmarkForArchival($contact);
1866                 }
1867
1868                 /// @todo On private posts we could obfuscate the date
1869                 $update = ($arr['private'] != self::PRIVATE) || in_array($arr['network'], Protocol::FEDERATED);
1870
1871                 // Is it a forum? Then we don't care about the rules from above
1872                 if (!$update && in_array($arr["network"], [Protocol::ACTIVITYPUB, Protocol::DFRN]) && ($arr["parent-uri-id"] === $arr["uri-id"])) {
1873                         if (DBA::exists('contact', ['id' => $arr['contact-id'], 'forum' => true])) {
1874                                 $update = true;
1875                         }
1876                 }
1877
1878                 if ($update) {
1879                         // The "self" contact id is used (for example in the connectors) when the contact is unknown
1880                         // So we have to ensure to only update the last item when it had been our own post,
1881                         // or it had been done by a "regular" contact.
1882                         if (!empty($arr['wall'])) {
1883                                 $condition = ['id' => $arr['contact-id']];
1884                         } else {
1885                                 $condition = ['id' => $arr['contact-id'], 'self' => false];
1886                         }
1887                         Contact::update(['failed' => false, 'success_update' => $arr['received'], 'last-item' => $arr['received']], $condition);
1888                 }
1889                 // Now do the same for the system wide contacts with uid=0
1890                 if ($arr['private'] != self::PRIVATE) {
1891                         Contact::update(['failed' => false, 'success_update' => $arr['received'], 'last-item' => $arr['received']],
1892                                 ['id' => $arr['owner-id']]);
1893
1894                         if ($arr['owner-id'] != $arr['author-id']) {
1895                                 Contact::update(['failed' => false, 'success_update' => $arr['received'], 'last-item' => $arr['received']],
1896                                         ['id' => $arr['author-id']]);
1897                         }
1898                 }
1899         }
1900
1901         public static function setHashtags($body)
1902         {
1903                 $body = BBCode::performWithEscapedTags($body, ['noparse', 'pre', 'code', 'img'], function ($body) {
1904                         $tags = BBCode::getTags($body);
1905
1906                         // No hashtags?
1907                         if (!count($tags)) {
1908                                 return $body;
1909                         }
1910
1911                         // This sorting is important when there are hashtags that are part of other hashtags
1912                         // Otherwise there could be problems with hashtags like #test and #test2
1913                         // Because of this we are sorting from the longest to the shortest tag.
1914                         usort($tags, function ($a, $b) {
1915                                 return strlen($b) <=> strlen($a);
1916                         });
1917
1918                         $URLSearchString = "^\[\]";
1919
1920                         // All hashtags should point to the home server if "local_tags" is activated
1921                         if (DI::config()->get('system', 'local_tags')) {
1922                                 $body = preg_replace("/#\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",
1923                                         "#[url=" . DI::baseUrl() . "/search?tag=$2]$2[/url]", $body);
1924                         }
1925
1926                         // mask hashtags inside of url, bookmarks and attachments to avoid urls in urls
1927                         $body = preg_replace_callback("/\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",
1928                                 function ($match) {
1929                                         return ("[url=" . str_replace("#", "&num;", $match[1]) . "]" . str_replace("#", "&num;", $match[2]) . "[/url]");
1930                                 }, $body);
1931
1932                         $body = preg_replace_callback("/\[bookmark\=([$URLSearchString]*)\](.*?)\[\/bookmark\]/ism",
1933                                 function ($match) {
1934                                         return ("[bookmark=" . str_replace("#", "&num;", $match[1]) . "]" . str_replace("#", "&num;", $match[2]) . "[/bookmark]");
1935                                 }, $body);
1936
1937                         $body = preg_replace_callback("/\[attachment (.*?)\](.*?)\[\/attachment\]/ism",
1938                                 function ($match) {
1939                                         return ("[attachment " . str_replace("#", "&num;", $match[1]) . "]" . $match[2] . "[/attachment]");
1940                                 }, $body);
1941
1942                         // Repair recursive urls
1943                         $body = preg_replace("/&num;\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",
1944                                 "&num;$2", $body);
1945
1946                         foreach ($tags as $tag) {
1947                                 if ((strpos($tag, '#') !== 0) || strpos($tag, '[url=') || strlen($tag) < 2 || $tag[1] == '#') {
1948                                         continue;
1949                                 }
1950
1951                                 $basetag = str_replace('_', ' ', substr($tag, 1));
1952                                 $newtag = '#[url=' . DI::baseUrl() . '/search?tag=' . $basetag . ']' . $basetag . '[/url]';
1953
1954                                 $body = str_replace($tag, $newtag, $body);
1955                         }
1956
1957                         // Convert back the masked hashtags
1958                         $body = str_replace("&num;", "#", $body);
1959
1960                         return $body;
1961                 });
1962
1963                 return $body;
1964         }
1965
1966         /**
1967          * look for mention tags and setup a second delivery chain for forum/community posts if appropriate
1968          *
1969          * @param int $uid
1970          * @param int $item_id
1971          * @return boolean true if item was deleted, else false
1972          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1973          * @throws \ImagickException
1974          */
1975         private static function tagDeliver($uid, $item_id)
1976         {
1977                 $mention = false;
1978
1979                 $owner = User::getOwnerDataById($uid);
1980                 if (!DBA::isResult($owner)) {
1981                         Logger::warning('User not found, quitting here.', ['uid' => $uid]);
1982                         return false;
1983                 }
1984
1985                 if ($owner['contact-type'] != User::ACCOUNT_TYPE_COMMUNITY) {
1986                         Logger::debug('Owner is no community, quitting here.', ['uid' => $uid, 'id' => $item_id]);
1987                         return false;
1988                 }
1989
1990                 $item = Post::selectFirst(self::ITEM_FIELDLIST, ['id' => $item_id, 'gravity' => [GRAVITY_PARENT, GRAVITY_COMMENT], 'origin' => false]);
1991                 if (!DBA::isResult($item)) {
1992                         Logger::debug('Post is an activity or origin or not found at all, quitting here.', ['id' => $item_id]);
1993                         return false;
1994                 }
1995
1996                 if ($item['gravity'] == GRAVITY_PARENT) {
1997                         $tags = Tag::getByURIId($item['uri-id'], [Tag::MENTION, Tag::EXCLUSIVE_MENTION]);
1998                         foreach ($tags as $tag) {
1999                                 if (Strings::compareLink($owner['url'], $tag['url'])) {
2000                                         $mention = true;
2001                                         Logger::info('Mention found in tag.', ['url' => $tag['url'], 'uri' => $item['uri'], 'uid' => $uid, 'id' => $item_id, 'uri-id' => $item['uri-id'], 'guid' => $item['guid']]);
2002                                 }
2003                         }
2004
2005                         if (!$mention) {
2006                                 Logger::info('Top-level post without mention is deleted.', ['uri' => $item['uri'], $uid, 'id' => $item_id, 'uri-id' => $item['uri-id'], 'guid' => $item['guid']]);
2007                                 Post\User::delete(['uri-id' => $item['uri-id'], 'uid' => $item['uid']]);
2008                                 return true;
2009                         }
2010
2011                         $arr = ['item' => $item, 'user' => $owner];
2012
2013                         Hook::callAll('tagged', $arr);
2014                 } else {
2015                         $tags = Tag::getByURIId($item['parent-uri-id'], [Tag::MENTION, Tag::EXCLUSIVE_MENTION]);
2016                         foreach ($tags as $tag) {
2017                                 if (Strings::compareLink($owner['url'], $tag['url'])) {
2018                                         $mention = true;
2019                                         Logger::info('Mention found in parent tag.', ['url' => $tag['url'], 'uri' => $item['uri'], 'uid' => $uid, 'id' => $item_id, 'uri-id' => $item['uri-id'], 'guid' => $item['guid']]);
2020                                 }
2021                         }
2022
2023                         if (!$mention) {
2024                                 Logger::debug('No mentions found in parent, quitting here.', ['id' => $item_id, 'uri-id' => $item['uri-id'], 'guid' => $item['guid']]);
2025                                 return false;
2026                         }
2027                 }
2028
2029                 Logger::info('Community post will be distributed', ['uri' => $item['uri'], 'uid' => $uid, 'id' => $item_id, 'uri-id' => $item['uri-id'], 'guid' => $item['guid']]);
2030
2031                 if ($owner['page-flags'] == User::PAGE_FLAGS_PRVGROUP) {
2032                         $allow_cid = '';
2033                         $allow_gid = '<' . Group::FOLLOWERS . '>';
2034                         $deny_cid  = '';
2035                         $deny_gid  = '';
2036                         self::performActivity($item['id'], 'announce', $uid, $allow_cid, $allow_gid, $deny_cid, $deny_gid);
2037                 } else {
2038                         self::performActivity($item['id'], 'announce', $uid);
2039                 }
2040
2041                 Logger::info('Community post had been distributed', ['uri' => $item['uri'], 'uid' => $uid, 'id' => $item_id, 'uri-id' => $item['uri-id'], 'guid' => $item['guid']]);
2042                 return false;
2043         }
2044
2045         /**
2046          * Automatically reshare the item if the "remote_self" option is selected
2047          *
2048          * @param array $item
2049          * @return void
2050          */
2051         private static function autoReshare(array $item)
2052         {
2053                 if ($item['gravity'] != GRAVITY_PARENT) {
2054                         return;
2055                 }
2056
2057                 if (!DBA::exists('contact', ['id' => $item['contact-id'], 'remote_self' => Contact::MIRROR_NATIVE_RESHARE])) {
2058                         return;
2059                 }
2060
2061                 if (!in_array($item['network'], [Protocol::ACTIVITYPUB, Protocol::DFRN])) {
2062                         return;
2063                 }
2064
2065                 Logger::info('Automatically reshare item', ['uid' => $item['uid'], 'id' => $item['id'], 'guid' => $item['guid'], 'uri-id' => $item['uri-id']]);
2066
2067                 self::performActivity($item['id'], 'announce', $item['uid']);
2068         }
2069
2070         public static function isRemoteSelf($contact, &$datarray)
2071         {
2072                 if (!$contact['remote_self']) {
2073                         return false;
2074                 }
2075
2076                 // Prevent the forwarding of posts that are forwarded
2077                 if (!empty($datarray["extid"]) && ($datarray["extid"] == Protocol::DFRN)) {
2078                         Logger::info('Already forwarded');
2079                         return false;
2080                 }
2081
2082                 // Prevent to forward already forwarded posts
2083                 if ($datarray["app"] == DI::baseUrl()->getHostname()) {
2084                         Logger::info('Already forwarded (second test)');
2085                         return false;
2086                 }
2087
2088                 // Only forward posts
2089                 if ($datarray["verb"] != Activity::POST) {
2090                         Logger::info('No post');
2091                         return false;
2092                 }
2093
2094                 if (($contact['network'] != Protocol::FEED) && ($datarray['private'] == self::PRIVATE)) {
2095                         Logger::info('Not public');
2096                         return false;
2097                 }
2098
2099                 $datarray2 = $datarray;
2100                 Logger::info('remote-self start', ['contact' => $contact['url'], 'remote_self'=> $contact['remote_self'], 'item' => $datarray]);
2101                 if ($contact['remote_self'] == Contact::MIRROR_OWN_POST) {
2102                         $self = DBA::selectFirst('contact', ['id', 'name', 'url', 'thumb'],
2103                                         ['uid' => $contact['uid'], 'self' => true]);
2104                         if (DBA::isResult($self)) {
2105                                 $datarray['contact-id'] = $self["id"];
2106
2107                                 $datarray['owner-name'] = $self["name"];
2108                                 $datarray['owner-link'] = $self["url"];
2109                                 $datarray['owner-avatar'] = $self["thumb"];
2110
2111                                 $datarray['author-name']   = $datarray['owner-name'];
2112                                 $datarray['author-link']   = $datarray['owner-link'];
2113                                 $datarray['author-avatar'] = $datarray['owner-avatar'];
2114
2115                                 unset($datarray['edited']);
2116
2117                                 unset($datarray['network']);
2118                                 unset($datarray['owner-id']);
2119                                 unset($datarray['author-id']);
2120                         }
2121
2122                         if ($contact['network'] != Protocol::FEED) {
2123                                 $old_uri_id = $datarray["uri-id"] ?? 0;
2124                                 $datarray["guid"] = System::createUUID();
2125                                 unset($datarray["plink"]);
2126                                 $datarray["uri"] = self::newURI($contact['uid'], $datarray["guid"]);
2127                                 $datarray["uri-id"] = ItemURI::getIdByURI($datarray["uri"]);
2128                                 $datarray["extid"] = Protocol::DFRN;
2129                                 $urlpart = parse_url($datarray2['author-link']);
2130                                 $datarray["app"] = $urlpart["host"];
2131                                 if (!empty($old_uri_id)) {
2132                                         Post\Media::copy($old_uri_id, $datarray["uri-id"]);
2133                                 }
2134
2135                                 unset($datarray["parent-uri"]);
2136                                 unset($datarray["thr-parent"]);
2137                         } else {
2138                                 $datarray['private'] = self::PUBLIC;
2139                         }
2140                 }
2141
2142                 if ($contact['network'] != Protocol::FEED) {
2143                         // Store the original post
2144                         $result = self::insert($datarray2);
2145                         Logger::info('remote-self post original item', ['contact' => $contact['url'], 'result'=> $result, 'item' => $datarray2]);
2146                 } else {
2147                         $datarray["app"] = "Feed";
2148                         $result = true;
2149                 }
2150
2151                 return (bool)$result;
2152         }
2153
2154         /**
2155          *
2156          * @param string $s
2157          * @param int    $uid
2158          * @param array  $item
2159          * @param int    $cid
2160          * @return string
2161          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
2162          * @throws \ImagickException
2163          */
2164         public static function fixPrivatePhotos($s, $uid, $item = null, $cid = 0)
2165         {
2166                 if (DI::config()->get('system', 'disable_embedded')) {
2167                         return $s;
2168                 }
2169
2170                 Logger::info('check for photos');
2171                 $site = substr(DI::baseUrl(), strpos(DI::baseUrl(), '://'));
2172
2173                 $orig_body = $s;
2174                 $new_body = '';
2175
2176                 $img_start = strpos($orig_body, '[img');
2177                 $img_st_close = ($img_start !== false ? strpos(substr($orig_body, $img_start), ']') : false);
2178                 $img_len = ($img_start !== false ? strpos(substr($orig_body, $img_start + $img_st_close + 1), '[/img]') : false);
2179
2180                 while (($img_st_close !== false) && ($img_len !== false)) {
2181                         $img_st_close++; // make it point to AFTER the closing bracket
2182                         $image = substr($orig_body, $img_start + $img_st_close, $img_len);
2183
2184                         Logger::info('found photo', ['image' => $image]);
2185
2186                         if (stristr($image, $site . '/photo/')) {
2187                                 // Only embed locally hosted photos
2188                                 $replace = false;
2189                                 $i = basename($image);
2190                                 $i = str_replace(['.jpg', '.png', '.gif'], ['', '', ''], $i);
2191                                 $x = strpos($i, '-');
2192
2193                                 if ($x) {
2194                                         $res = substr($i, $x + 1);
2195                                         $i = substr($i, 0, $x);
2196                                         $photo = Photo::getPhotoForUser($uid, $i, $res);
2197                                         if (DBA::isResult($photo)) {
2198                                                 /*
2199                                                  * Check to see if we should replace this photo link with an embedded image
2200                                                  * 1. No need to do so if the photo is public
2201                                                  * 2. If there's a contact-id provided, see if they're in the access list
2202                                                  *    for the photo. If so, embed it.
2203                                                  * 3. Otherwise, if we have an item, see if the item permissions match the photo
2204                                                  *    permissions, regardless of order but first check to see if they're an exact
2205                                                  *    match to save some processing overhead.
2206                                                  */
2207                                                 if (self::hasPermissions($photo)) {
2208                                                         if ($cid) {
2209                                                                 $recips = self::enumeratePermissions($photo);
2210                                                                 if (in_array($cid, $recips)) {
2211                                                                         $replace = true;
2212                                                                 }
2213                                                         } elseif ($item) {
2214                                                                 if (self::samePermissions($uid, $item, $photo)) {
2215                                                                         $replace = true;
2216                                                                 }
2217                                                         }
2218                                                 }
2219                                                 if ($replace) {
2220                                                         $photo_img = Photo::getImageForPhoto($photo);
2221                                                         // If a custom width and height were specified, apply before embedding
2222                                                         if (preg_match("/\[img\=([0-9]*)x([0-9]*)\]/is", substr($orig_body, $img_start, $img_st_close), $match)) {
2223                                                                 Logger::info('scaling photo');
2224
2225                                                                 $width = intval($match[1]);
2226                                                                 $height = intval($match[2]);
2227
2228                                                                 $photo_img->scaleDown(max($width, $height));
2229                                                         }
2230
2231                                                         $data = $photo_img->asString();
2232                                                         $type = $photo_img->getType();
2233
2234                                                         Logger::info('replacing photo');
2235                                                         $image = 'data:' . $type . ';base64,' . base64_encode($data);
2236                                                         Logger::debug('replaced', ['image' => $image]);
2237                                                 }
2238                                         }
2239                                 }
2240                         }
2241
2242                         $new_body = $new_body . substr($orig_body, 0, $img_start + $img_st_close) . $image . '[/img]';
2243                         $orig_body = substr($orig_body, $img_start + $img_st_close + $img_len + strlen('[/img]'));
2244                         if ($orig_body === false) {
2245                                 $orig_body = '';
2246                         }
2247
2248                         $img_start = strpos($orig_body, '[img');
2249                         $img_st_close = ($img_start !== false ? strpos(substr($orig_body, $img_start), ']') : false);
2250                         $img_len = ($img_start !== false ? strpos(substr($orig_body, $img_start + $img_st_close + 1), '[/img]') : false);
2251                 }
2252
2253                 $new_body = $new_body . $orig_body;
2254
2255                 return $new_body;
2256         }
2257
2258         private static function hasPermissions($obj)
2259         {
2260                 return !empty($obj['allow_cid']) || !empty($obj['allow_gid']) ||
2261                         !empty($obj['deny_cid']) || !empty($obj['deny_gid']);
2262         }
2263
2264         private static function samePermissions($uid, $obj1, $obj2)
2265         {
2266                 // first part is easy. Check that these are exactly the same.
2267                 if (($obj1['allow_cid'] == $obj2['allow_cid'])
2268                         && ($obj1['allow_gid'] == $obj2['allow_gid'])
2269                         && ($obj1['deny_cid'] == $obj2['deny_cid'])
2270                         && ($obj1['deny_gid'] == $obj2['deny_gid'])) {
2271                         return true;
2272                 }
2273
2274                 // This is harder. Parse all the permissions and compare the resulting set.
2275                 $recipients1 = self::enumeratePermissions($obj1);
2276                 $recipients2 = self::enumeratePermissions($obj2);
2277                 sort($recipients1);
2278                 sort($recipients2);
2279
2280                 /// @TODO Comparison of arrays, maybe use array_diff_assoc() here?
2281                 return ($recipients1 == $recipients2);
2282         }
2283
2284         /**
2285          * Returns an array of contact-ids that are allowed to see this object
2286          *
2287          * @param array $obj        Item array with at least uid, allow_cid, allow_gid, deny_cid and deny_gid
2288          * @param bool  $check_dead Prunes unavailable contacts from the result
2289          * @return array
2290          * @throws \Exception
2291          */
2292         public static function enumeratePermissions(array $obj, bool $check_dead = false)
2293         {
2294                 $aclFormater = DI::aclFormatter();
2295
2296                 $allow_people = $aclFormater->expand($obj['allow_cid']);
2297                 $allow_groups = Group::expand($obj['uid'], $aclFormater->expand($obj['allow_gid']), $check_dead);
2298                 $deny_people  = $aclFormater->expand($obj['deny_cid']);
2299                 $deny_groups  = Group::expand($obj['uid'], $aclFormater->expand($obj['deny_gid']), $check_dead);
2300                 $recipients   = array_unique(array_merge($allow_people, $allow_groups));
2301                 $deny         = array_unique(array_merge($deny_people, $deny_groups));
2302                 $recipients   = array_diff($recipients, $deny);
2303                 return $recipients;
2304         }
2305
2306         public static function expire(int $uid, int $days, string $network = "", bool $force = false)
2307         {
2308                 if (!$uid || ($days < 1)) {
2309                         return;
2310                 }
2311
2312                 $condition = ["`uid` = ? AND NOT `deleted` AND `gravity` = ?",
2313                         $uid, GRAVITY_PARENT];
2314
2315                 /*
2316                  * $expire_network_only = save your own wall posts
2317                  * and just expire conversations started by others
2318                  */
2319                 $expire_network_only = DI::pConfig()->get($uid, 'expire', 'network_only', false);
2320
2321                 if ($expire_network_only) {
2322                         $condition[0] .= " AND NOT `wall`";
2323                 }
2324
2325                 if ($network != "") {
2326                         $condition[0] .= " AND `network` = ?";
2327                         $condition[] = $network;
2328                 }
2329
2330                 $condition[0] .= " AND `received` < ?";
2331                 $condition[] = DateTimeFormat::utc('now - ' . $days . ' day');
2332
2333                 $items = Post::select(['resource-id', 'starred', 'id', 'post-type', 'uid', 'uri-id'], $condition);
2334
2335                 if (!DBA::isResult($items)) {
2336                         return;
2337                 }
2338
2339                 $expire_items = DI::pConfig()->get($uid, 'expire', 'items', true);
2340
2341                 // Forcing expiring of items - but not notes and marked items
2342                 if ($force) {
2343                         $expire_items = true;
2344                 }
2345
2346                 $expire_notes = DI::pConfig()->get($uid, 'expire', 'notes', true);
2347                 $expire_starred = DI::pConfig()->get($uid, 'expire', 'starred', true);
2348                 $expire_photos = DI::pConfig()->get($uid, 'expire', 'photos', false);
2349
2350                 $expired = 0;
2351
2352                 $priority = DI::config()->get('system', 'expire-notify-priority');
2353
2354                 while ($item = Post::fetch($items)) {
2355                         // don't expire filed items
2356                         if (DBA::exists('post-category', ['uri-id' => $item['uri-id'], 'uid' => $item['uid'], 'type' => Post\Category::FILE])) {
2357                                 continue;
2358                         }
2359
2360                         // Only expire posts, not photos and photo comments
2361
2362                         if (!$expire_photos && !empty($item['resource-id'])) {
2363                                 continue;
2364                         } elseif (!$expire_starred && intval($item['starred'])) {
2365                                 continue;
2366                         } elseif (!$expire_notes && ($item['post-type'] == self::PT_PERSONAL_NOTE)) {
2367                                 continue;
2368                         } elseif (!$expire_items && ($item['post-type'] != self::PT_PERSONAL_NOTE)) {
2369                                 continue;
2370                         }
2371
2372                         self::markForDeletionById($item['id'], $priority);
2373
2374                         ++$expired;
2375                 }
2376                 DBA::close($items);
2377                 Logger::notice('User ' . $uid . ": expired $expired items; expire items: $expire_items, expire notes: $expire_notes, expire starred: $expire_starred, expire photos: $expire_photos");
2378         }
2379
2380         public static function firstPostDate($uid, $wall = false)
2381         {
2382                 $user = User::getById($uid, ['register_date']);
2383                 if (empty($user)) {
2384                         return false;
2385                 }
2386
2387                 $condition = ["`uid` = ? AND `wall` = ? AND NOT `deleted` AND `visible` AND `received` >= ?",
2388                         $uid, $wall, $user['register_date']];
2389                 $params = ['order' => ['received' => false]];
2390                 $thread = Post::selectFirstThread(['received'], $condition, $params);
2391                 if (DBA::isResult($thread)) {
2392                         $postdate = substr(DateTimeFormat::local($thread['received']), 0, 10);
2393                         return $postdate;
2394                 }
2395                 return false;
2396         }
2397
2398         /**
2399          * add/remove activity to an item
2400          *
2401          * Toggle activities as like,dislike,attend of an item
2402          *
2403          * @param int    $item_id
2404          * @param string $verb
2405          *            Activity verb. One of
2406          *            like, unlike, dislike, undislike, attendyes, unattendyes,
2407          *            attendno, unattendno, attendmaybe, unattendmaybe,
2408          *            announce, unannouce
2409          * @param int    $uid
2410          * @param string $allow_cid
2411          * @param string $allow_gid
2412          * @param string $deny_cid
2413          * @param string $deny_gid
2414          * @return bool
2415          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
2416          * @throws \ImagickException
2417          * @hook  'post_local_end'
2418          *            array $arr
2419          *            'post_id' => ID of posted item
2420          */
2421         public static function performActivity(int $item_id, string $verb, int $uid, string $allow_cid = null, string $allow_gid = null, string $deny_cid = null, string $deny_gid = null)
2422         {
2423                 if (empty($uid)) {
2424                         return false;
2425                 }
2426
2427                 Logger::notice('Start create activity', ['verb' => $verb, 'item' => $item_id, 'user' => $uid]);
2428
2429                 $item = Post::selectFirst(self::ITEM_FIELDLIST, ['id' => $item_id]);
2430                 if (!DBA::isResult($item)) {
2431                         Logger::notice('like: unknown item', ['id' => $item_id]);
2432                         return false;
2433                 }
2434
2435                 $uri_id = $item['uri-id'];
2436
2437                 if (!in_array($item['uid'], [0, $uid])) {
2438                         return false;
2439                 }
2440
2441                 if (!Post::exists(['uri-id' => $item['parent-uri-id'], 'uid' => $uid])) {
2442                         $stored = self::storeForUserByUriId($item['parent-uri-id'], $uid);
2443                         if (($item['parent-uri-id'] == $item['uri-id']) && !empty($stored)) {
2444                                 $item = Post::selectFirst(self::ITEM_FIELDLIST, ['id' => $stored]);
2445                                 if (!DBA::isResult($item)) {
2446                                         Logger::info('Could not fetch just created item - should not happen', ['stored' => $stored, 'uid' => $uid, 'uri-id' => $uri_id]);
2447                                         return false;
2448                                 }
2449                         }
2450                 }
2451
2452                 // Retrieves the local post owner
2453                 $owner = User::getOwnerDataById($uid);
2454                 if (empty($owner)) {
2455                         Logger::info('Empty owner for user', ['uid' => $uid]);
2456                         return false;
2457                 }
2458
2459                 // Retrieve the current logged in user's public contact
2460                 $author_id = Contact::getIdForURL($owner['url']);
2461                 if (empty($author_id)) {
2462                         Logger::info('Empty public contact');
2463                         return false;
2464                 }
2465
2466                 $activity = null;
2467                 switch ($verb) {
2468                         case 'like':
2469                         case 'unlike':
2470                                 $activity = Activity::LIKE;
2471                                 break;
2472                         case 'dislike':
2473                         case 'undislike':
2474                                 $activity = Activity::DISLIKE;
2475                                 break;
2476                         case 'attendyes':
2477                         case 'unattendyes':
2478                                 $activity = Activity::ATTEND;
2479                                 break;
2480                         case 'attendno':
2481                         case 'unattendno':
2482                                 $activity = Activity::ATTENDNO;
2483                                 break;
2484                         case 'attendmaybe':
2485                         case 'unattendmaybe':
2486                                 $activity = Activity::ATTENDMAYBE;
2487                                 break;
2488                         case 'follow':
2489                         case 'unfollow':
2490                                 $activity = Activity::FOLLOW;
2491                                 break;
2492                         case 'announce':
2493                         case 'unannounce':
2494                                 $activity = Activity::ANNOUNCE;
2495                                 break;
2496                         default:
2497                                 Logger::notice('unknown verb', ['verb' => $verb, 'item' => $item_id]);
2498                                 return false;
2499                 }
2500
2501                 $mode = Strings::startsWith($verb, 'un') ? 'delete' : 'create';
2502
2503                 // Enable activity toggling instead of on/off
2504                 $event_verb_flag = $activity === Activity::ATTEND || $activity === Activity::ATTENDNO || $activity === Activity::ATTENDMAYBE;
2505
2506                 // Look for an existing verb row
2507                 // Event participation activities are mutually exclusive, only one of them can exist at all times.
2508                 if ($event_verb_flag) {
2509                         $verbs = [Activity::ATTEND, Activity::ATTENDNO, Activity::ATTENDMAYBE];
2510
2511                         // Translate to the index based activity index
2512                         $vids = [];
2513                         foreach ($verbs as $verb) {
2514                                 $vids[] = Verb::getID($verb);
2515                         }
2516                 } else {
2517                         $vids = Verb::getID($activity);
2518                 }
2519
2520                 $condition = ['vid' => $vids, 'deleted' => false, 'gravity' => GRAVITY_ACTIVITY,
2521                         'author-id' => $author_id, 'uid' => $item['uid'], 'thr-parent-id' => $uri_id];
2522                 $like_item = Post::selectFirst(['id', 'guid', 'verb'], $condition);
2523
2524                 if (DBA::isResult($like_item)) {
2525                         /**
2526                          * Truth table for existing activities
2527                          *
2528                          * |          Inputs            ||      Outputs      |
2529                          * |----------------------------||-------------------|
2530                          * |  Mode  | Event | Same verb || Delete? | Return? |
2531                          * |--------|-------|-----------||---------|---------|
2532                          * | create |  Yes  |    Yes    ||   No    |   Yes   |
2533                          * | create |  Yes  |    No     ||   Yes   |   No    |
2534                          * | create |  No   |    Yes    ||   No    |   Yes   |
2535                          * | create |  No   |    No     ||        N/A†       |
2536                          * | delete |  Yes  |    Yes    ||   Yes   |   N/A‡  |
2537                          * | delete |  Yes  |    No     ||   No    |   N/A‡  |
2538                          * | delete |  No   |    Yes    ||   Yes   |   N/A‡  |
2539                          * | delete |  No   |    No     ||        N/A†       |
2540                          * |--------|-------|-----------||---------|---------|
2541                          * |   A    |   B   |     C     || A xor C | !B or C |
2542                          *
2543                          * † Can't happen: It's impossible to find an existing non-event activity without
2544                          *                 the same verb because we are only looking for this single verb.
2545                          *
2546                          * ‡ The "mode = delete" is returning early whether an existing activity was found or not.
2547                          */
2548                         if ($mode == 'create' xor $like_item['verb'] == $activity) {
2549                                 self::markForDeletionById($like_item['id']);
2550                         }
2551
2552                         if (!$event_verb_flag || $like_item['verb'] == $activity) {
2553                                 return true;
2554                         }
2555                 }
2556
2557                 // No need to go further if we aren't creating anything
2558                 if ($mode == 'delete') {
2559                         return true;
2560                 }
2561
2562                 $objtype = $item['resource-id'] ? Activity\ObjectType::IMAGE : Activity\ObjectType::NOTE;
2563
2564                 $new_item = [
2565                         'guid'          => System::createUUID(),
2566                         'uri'           => self::newURI($item['uid']),
2567                         'uid'           => $item['uid'],
2568                         'contact-id'    => $owner['id'],
2569                         'wall'          => $item['wall'],
2570                         'origin'        => 1,
2571                         'network'       => Protocol::DFRN,
2572                         'protocol'      => Conversation::PARCEL_DIRECT,
2573                         'direction'     => Conversation::PUSH,
2574                         'gravity'       => GRAVITY_ACTIVITY,
2575                         'parent'        => $item['id'],
2576                         'thr-parent'    => $item['uri'],
2577                         'owner-id'      => $author_id,
2578                         'author-id'     => $author_id,
2579                         'body'          => $activity,
2580                         'verb'          => $activity,
2581                         'object-type'   => $objtype,
2582                         'allow_cid'     => $allow_cid ?? $item['allow_cid'],
2583                         'allow_gid'     => $allow_gid ?? $item['allow_gid'],
2584                         'deny_cid'      => $deny_cid ?? $item['deny_cid'],
2585                         'deny_gid'      => $deny_gid ?? $item['deny_gid'],
2586                         'visible'       => 1,
2587                         'unseen'        => 1,
2588                 ];
2589
2590                 $signed = Diaspora::createLikeSignature($uid, $new_item);
2591                 if (!empty($signed)) {
2592                         $new_item['diaspora_signed_text'] = json_encode($signed);
2593                 }
2594
2595                 $new_item_id = self::insert($new_item);
2596
2597                 // If the parent item isn't visible then set it to visible
2598                 if (!$item['visible']) {
2599                         self::update(['visible' => true], ['id' => $item['id']]);
2600                 }
2601
2602                 $new_item['id'] = $new_item_id;
2603
2604                 Hook::callAll('post_local_end', $new_item);
2605
2606                 return true;
2607         }
2608
2609         /**
2610          * Fetch the SQL condition for the given user id
2611          *
2612          * @param integer $owner_id User ID for which the permissions should be fetched
2613          * @return array condition
2614          */
2615         public static function getPermissionsConditionArrayByUserId(int $owner_id)
2616         {
2617                 $local_user = local_user();
2618                 $remote_user = Session::getRemoteContactID($owner_id);
2619
2620                 // default permissions - anonymous user
2621                 $condition = ["`private` != ?", self::PRIVATE];
2622
2623                 if ($local_user && ($local_user == $owner_id)) {
2624                         // Profile owner - everything is visible
2625                         $condition = [];
2626                 } elseif ($remote_user) {
2627                          // Authenticated visitor - fetch the matching permissionsets
2628                         $permissionSets = DI::permissionSet()->selectByContactId($remote_user, $owner_id);
2629                         if (!empty($set)) {
2630                                 $condition = ["(`private` != ? OR (`private` = ? AND `wall`
2631                                         AND `psid` IN (" . implode(', ', array_fill(0, count($set), '?')) . ")))",
2632                                         self::PRIVATE, self::PRIVATE];
2633                                 $condition = array_merge($condition, $permissionSets->column('id'));
2634                         }
2635                 }
2636
2637                 return $condition;
2638         }
2639
2640         /**
2641          * Get a permission SQL string for the given user
2642          *
2643          * @param int $owner_id
2644          * @param string $table
2645          * @return string
2646          */
2647         public static function getPermissionsSQLByUserId(int $owner_id, string $table = '')
2648         {
2649                 $local_user = local_user();
2650                 $remote_user = Session::getRemoteContactID($owner_id);
2651
2652                 if (!empty($table)) {
2653                         $table = DBA::quoteIdentifier($table) . '.';
2654                 }
2655
2656                 /*
2657                  * Construct permissions
2658                  *
2659                  * default permissions - anonymous user
2660                  */
2661                 $sql = sprintf(" AND " . $table . "`private` != %d", self::PRIVATE);
2662
2663                 // Profile owner - everything is visible
2664                 if ($local_user && ($local_user == $owner_id)) {
2665                         $sql = '';
2666                 } elseif ($remote_user) {
2667                         /*
2668                          * Authenticated visitor. Unless pre-verified,
2669                          * check that the contact belongs to this $owner_id
2670                          * and load the groups the visitor belongs to.
2671                          * If pre-verified, the caller is expected to have already
2672                          * done this and passed the groups into this function.
2673                          */
2674                         $permissionSets = DI::permissionSet()->selectByContactId($remote_user, $owner_id);
2675
2676                         if (!empty($set)) {
2677                                 $sql_set = sprintf(" OR (" . $table . "`private` = %d AND " . $table . "`wall` AND " . $table . "`psid` IN (", self::PRIVATE) . implode(',', $permissionSets->column('id')) . "))";
2678                         } else {
2679                                 $sql_set = '';
2680                         }
2681
2682                         $sql = sprintf(" AND (" . $table . "`private` != %d", self::PRIVATE) . $sql_set . ")";
2683                 }
2684
2685                 return $sql;
2686         }
2687
2688         /**
2689          * get translated item type
2690          *
2691          * @param array                $item
2692          * @param \Friendica\Core\L10n $l10n
2693          * @return string
2694          */
2695         public static function postType(array $item, \Friendica\Core\L10n $l10n)
2696         {
2697                 if (!empty($item['event-id'])) {
2698                         return $l10n->t('event');
2699                 } elseif (!empty($item['resource-id'])) {
2700                         return $l10n->t('photo');
2701                 } elseif ($item['gravity'] == GRAVITY_ACTIVITY) {
2702                         return $l10n->t('activity');
2703                 } elseif ($item['gravity'] == GRAVITY_COMMENT) {
2704                         return $l10n->t('comment');
2705                 }
2706
2707                 return $l10n->t('post');
2708         }
2709
2710         /**
2711          * Sets the "rendered-html" field of the provided item
2712          *
2713          * Body is preserved to avoid side-effects as we modify it just-in-time for spoilers and private image links
2714          *
2715          * @param array $item
2716          *
2717          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
2718          * @todo Remove reference, simply return "rendered-html" and "rendered-hash"
2719          */
2720         private static function putInCache(&$item)
2721         {
2722                 // Save original body to prevent addons to modify it
2723                 $body = $item['body'];
2724
2725                 $rendered_hash = $item['rendered-hash'] ?? '';
2726                 $rendered_html = $item['rendered-html'] ?? '';
2727
2728                 if ($rendered_hash == ''
2729                         || $rendered_html == ''
2730                         || $rendered_hash != hash('md5', BBCode::VERSION . '::' . $body)
2731                         || DI::config()->get('system', 'ignore_cache')
2732                 ) {
2733                         $item['rendered-html'] = BBCode::convertForUriId($item['uri-id'], $item['body']);
2734                         $item['rendered-hash'] = hash('md5', BBCode::VERSION . '::' . $body);
2735
2736                         $hook_data = ['item' => $item, 'rendered-html' => $item['rendered-html'], 'rendered-hash' => $item['rendered-hash']];
2737                         Hook::callAll('put_item_in_cache', $hook_data);
2738                         $item['rendered-html'] = $hook_data['rendered-html'];
2739                         $item['rendered-hash'] = $hook_data['rendered-hash'];
2740                         unset($hook_data);
2741
2742                         // Update if the generated values differ from the existing ones
2743                         if ((($rendered_hash != $item['rendered-hash']) || ($rendered_html != $item['rendered-html'])) && !empty($item['id'])) {
2744                                 self::update(
2745                                         [
2746                                                 'rendered-html' => $item['rendered-html'],
2747                                                 'rendered-hash' => $item['rendered-hash']
2748                                         ],
2749                                         ['id' => $item['id']]
2750                                 );
2751                         }
2752                 }
2753
2754                 $item['body'] = $body;
2755         }
2756
2757         /**
2758          * Given an item array, convert the body element from bbcode to html and add smilie icons.
2759          * If attach is true, also add icons for item attachments.
2760          *
2761          * @param array   $item
2762          * @param boolean $attach
2763          * @param boolean $is_preview
2764          * @param boolean $only_cache
2765          * @return string item body html
2766          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
2767          * @throws \ImagickException
2768          * @hook  prepare_body_init item array before any work
2769          * @hook  prepare_body_content_filter ('item'=>item array, 'filter_reasons'=>string array) before first bbcode to html
2770          * @hook  prepare_body ('item'=>item array, 'html'=>body string, 'is_preview'=>boolean, 'filter_reasons'=>string array) after first bbcode to html
2771          * @hook  prepare_body_final ('item'=>item array, 'html'=>body string) after attach icons and blockquote special case handling (spoiler, author)
2772          */
2773         public static function prepareBody(array &$item, $attach = false, $is_preview = false, $only_cache = false)
2774         {
2775                 $a = DI::app();
2776                 Hook::callAll('prepare_body_init', $item);
2777
2778                 // In order to provide theme developers more possibilities, event items
2779                 // are treated differently.
2780                 if ($item['object-type'] === Activity\ObjectType::EVENT && isset($item['event-id'])) {
2781                         $ev = Event::getItemHTML($item);
2782                         return $ev;
2783                 }
2784
2785                 $tags = Tag::populateFromItem($item);
2786
2787                 $item['tags'] = $tags['tags'];
2788                 $item['hashtags'] = $tags['hashtags'];
2789                 $item['mentions'] = $tags['mentions'];
2790
2791                 $body = $item['body'] ?? '';
2792                 $shared = BBCode::fetchShareAttributes($body);
2793                 if (!empty($shared['guid'])) {
2794                         $shared_item = Post::selectFirst(['uri-id', 'plink', 'has-media'], ['guid' => $shared['guid']]);
2795                         $shared_uri_id = $shared_item['uri-id'] ?? 0;
2796                         $shared_links = [strtolower($shared_item['plink'] ?? '')];
2797                         $shared_attachments = Post\Media::splitAttachments($shared_uri_id, $shared['guid'], [], $shared_item['has-media'] ?? false);
2798                         $shared_links = array_merge($shared_links, array_column($shared_attachments['visual'], 'url'));
2799                         $shared_links = array_merge($shared_links, array_column($shared_attachments['link'], 'url'));
2800                         $shared_links = array_merge($shared_links, array_column($shared_attachments['additional'], 'url'));
2801                         $item['body'] = self::replaceVisualAttachments($shared_attachments, $item['body']);
2802                 } else {
2803                         $shared_uri_id = 0;
2804                         $shared_links = [];
2805                 }
2806                 $attachments = Post\Media::splitAttachments($item['uri-id'], $item['guid'] ?? '', $shared_links, $item['has-media']);
2807                 $item['body'] = self::replaceVisualAttachments($attachments, $item['body'] ?? '');
2808
2809                 $item['body'] = preg_replace("/\s*\[attachment .*?\].*?\[\/attachment\]\s*/ism", "\n", $item['body']);
2810                 self::putInCache($item);
2811                 $item['body'] = $body;
2812                 $s = $item["rendered-html"];
2813
2814                 if ($only_cache) {
2815                         return;
2816                 }
2817
2818                 // Compile eventual content filter reasons
2819                 $filter_reasons = [];
2820                 if (!$is_preview && public_contact() != $item['author-id']) {
2821                         if (!empty($item['content-warning']) && (!local_user() || !DI::pConfig()->get(local_user(), 'system', 'disable_cw', false))) {
2822                                 $filter_reasons[] = DI::l10n()->t('Content warning: %s', $item['content-warning']);
2823                         }
2824
2825                         $item['attachments'] = $attachments;
2826
2827                         $hook_data = [
2828                                 'item' => $item,
2829                                 'filter_reasons' => $filter_reasons
2830                         ];
2831                         Hook::callAll('prepare_body_content_filter', $hook_data);
2832                         $filter_reasons = $hook_data['filter_reasons'];
2833                         unset($hook_data);
2834                 }
2835
2836                 $hook_data = [
2837                         'item' => $item,
2838                         'html' => $s,
2839                         'preview' => $is_preview,
2840                         'filter_reasons' => $filter_reasons
2841                 ];
2842                 Hook::callAll('prepare_body', $hook_data);
2843                 $s = $hook_data['html'];
2844                 unset($hook_data);
2845
2846                 if (!$attach) {
2847                         // Replace the blockquotes with quotes that are used in mails.
2848                         $mailquote = '<blockquote type="cite" class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">';
2849                         $s = str_replace(['<blockquote>', '<blockquote class="spoiler">', '<blockquote class="author">'], [$mailquote, $mailquote, $mailquote], $s);
2850                         return $s;
2851                 }
2852
2853                 if (!empty($shared_attachments)) {
2854                         $s = self::addVisualAttachments($shared_attachments, $item, $s, true);
2855                         $s = self::addLinkAttachment($shared_uri_id ?: $item['uri-id'], $shared_attachments, $body, $s, true, []);
2856                         $s = self::addNonVisualAttachments($shared_attachments, $item, $s, true);
2857                         $body = preg_replace("/\s*\[share .*?\].*?\[\/share\]\s*/ism", '', $body);
2858                 }
2859
2860                 $s = self::addVisualAttachments($attachments, $item, $s, false);
2861                 $s = self::addLinkAttachment($item['uri-id'], $attachments, $body, $s, false, $shared_links);
2862                 $s = self::addNonVisualAttachments($attachments, $item, $s, false);
2863                 $s = self::addQuestions($item, $s);
2864
2865                 // Map.
2866                 if (strpos($s, '<div class="map">') !== false && !empty($item['coord'])) {
2867                         $x = Map::byCoordinates(trim($item['coord']));
2868                         if ($x) {
2869                                 $s = preg_replace('/\<div class\=\"map\"\>/', '$0' . $x, $s);
2870                         }
2871                 }
2872
2873                 // Replace friendica image url size with theme preference.
2874                 if (!empty($a->getThemeInfoValue('item_image_size'))) {
2875                         $ps = $a->getThemeInfoValue('item_image_size');
2876                         $s = preg_replace('|(<img[^>]+src="[^"]+/photo/[0-9a-f]+)-[0-9]|', "$1-" . $ps, $s);
2877                 }
2878
2879                 $s = HTML::applyContentFilter($s, $filter_reasons);
2880
2881                 $hook_data = ['item' => $item, 'html' => $s];
2882                 Hook::callAll('prepare_body_final', $hook_data);
2883
2884                 return $hook_data['html'];
2885         }
2886
2887         /**
2888          * Check if the body contains a link
2889          *
2890          * @param string $body
2891          * @param string $url
2892          * @param int    $type
2893          * @return bool
2894          */
2895         public static function containsLink(string $body, string $url, int $type = 0)
2896         {
2897                 // Make sure that for example site parameters aren't used when testing if the link is contained in the body
2898                 $urlparts = parse_url($url);
2899                 unset($urlparts['query']);
2900                 unset($urlparts['fragment']);
2901                 $url = Network::unparseURL($urlparts);
2902
2903                 // Remove media links to only search in embedded content
2904                 // @todo Check images for image link, audio for audio links, ...
2905                 if (in_array($type, [Post\Media::AUDIO, Post\Media::VIDEO, Post\Media::IMAGE])) {
2906                         $body = preg_replace("/\[url=[^\[\]]*\](.*)\[\/url\]/Usi", ' $1 ', $body);
2907                 }
2908
2909                 if (strpos($body, $url)) {
2910                         return true;
2911                 }
2912                 foreach ([0, 1, 2] as $size) {
2913                         if (preg_match('#/photo/.*-' . $size . '\.#ism', $url) &&
2914                                 strpos(preg_replace('#(/photo/.*)-[012]\.#ism', '$1-' . $size . '.', $body), $url)) {
2915                                 return true;
2916                         }
2917                 }
2918                 return false;
2919         }
2920
2921         /**
2922          * Replace visual attachments in the body
2923          *
2924          * @param array $attachments
2925          * @param string $body
2926          * @return string modified body
2927          */
2928         private static function replaceVisualAttachments(array $attachments, string $body)
2929         {
2930                 DI::profiler()->startRecording('rendering');
2931
2932                 foreach ($attachments['visual'] as $attachment) {
2933                         if (!empty($attachment['preview'])) {
2934                                 $body = str_replace($attachment['preview'], Post\Media::getPreviewUrlForId($attachment['id'], Proxy::SIZE_LARGE), $body);
2935                         } elseif ($attachment['filetype'] == 'image') {
2936                                 $body = str_replace($attachment['url'], Post\Media::getUrlForId($attachment['id']), $body);
2937                         }
2938                 }
2939                 DI::profiler()->stopRecording();
2940                 return $body;
2941         }
2942
2943         /**
2944          * Add visual attachments to the content
2945          *
2946          * @param array $attachments
2947          * @param array $item
2948          * @param string $content
2949          * @return string modified content
2950          */
2951         private static function addVisualAttachments(array $attachments, array $item, string $content, bool $shared)
2952         {
2953                 DI::profiler()->startRecording('rendering');
2954                 $leading = '';
2955                 $trailing = '';
2956
2957                 // @todo In the future we should make a single for the template engine with all media in it. This allows more flexibilty.
2958                 foreach ($attachments['visual'] as $attachment) {
2959                         if (self::containsLink($item['body'], $attachment['preview'] ?? $attachment['url'], $attachment['type'])) {
2960                                 continue;
2961                         }
2962
2963                         if (!empty($attachment['preview'])) {
2964                                 $preview_url = Post\Media::getPreviewUrlForId($attachment['id'], Proxy::SIZE_LARGE);
2965                         } else {
2966                                 $preview_url = '';
2967                         }
2968
2969                         if (($attachment['filetype'] == 'video')) {
2970                                 /// @todo Move the template to /content as well
2971                                 $media = Renderer::replaceMacros(Renderer::getMarkupTemplate('video_top.tpl'), [
2972                                         '$video' => [
2973                                                 'id'      => $attachment['id'],
2974                                                 'src'     => $attachment['url'],
2975                                                 'name'    => $attachment['name'] ?: $attachment['url'],
2976                                                 'preview' => $preview_url,
2977                                                 'mime'    => $attachment['mimetype'],
2978                                         ],
2979                                 ]);
2980                                 if (($item['post-type'] ?? null) == Item::PT_VIDEO) {
2981                                         $leading .= $media;
2982                                 } else {
2983                                         $trailing .= $media;
2984                                 }
2985                         } elseif ($attachment['filetype'] == 'audio') {
2986                                 $media = Renderer::replaceMacros(Renderer::getMarkupTemplate('content/audio.tpl'), [
2987                                         '$audio' => [
2988                                                 'id'     => $attachment['id'],
2989                                                 'src'    => $attachment['url'],
2990                                                 'name'   => $attachment['name'] ?: $attachment['url'],
2991                                                 'mime'   => $attachment['mimetype'],
2992                                         ],
2993                                 ]);
2994                                 if (($item['post-type'] ?? null) == Item::PT_AUDIO) {
2995                                         $leading .= $media;
2996                                 } else {
2997                                         $trailing .= $media;
2998                                 }
2999                         } elseif ($attachment['filetype'] == 'image') {
3000                                 $media = Renderer::replaceMacros(Renderer::getMarkupTemplate('content/image.tpl'), [
3001                                         '$image' => [
3002                                                 'src'        => Post\Media::getUrlForId($attachment['id']),
3003                                                 'preview'    => Post\Media::getPreviewUrlForId($attachment['id'], ($attachment['width'] > $attachment['height']) ? Proxy::SIZE_MEDIUM : Proxy::SIZE_LARGE),
3004                                                 'attachment' => $attachment,
3005                                         ],
3006                                 ]);
3007                                 // On Diaspora posts the attached pictures are leading
3008                                 if ($item['network'] == Protocol::DIASPORA) {
3009                                         $leading .= $media;
3010                                 } else {
3011                                         $trailing .= $media;
3012                                 }
3013                         }
3014                 }
3015
3016                 if ($shared) {
3017                         $content = str_replace(BBCode::TOP_ANCHOR, '<div class="body-attach">' . $leading . '<div class="clear"></div></div>' . BBCode::TOP_ANCHOR, $content);
3018                         $content = str_replace(BBCode::BOTTOM_ANCHOR, '<div class="body-attach">' . $trailing . '<div class="clear"></div></div>' . BBCode::BOTTOM_ANCHOR, $content);
3019                 } else {
3020                         if ($leading != '') {
3021                                 $content = '<div class="body-attach">' . $leading . '<div class="clear"></div></div>' . $content;
3022                         }
3023
3024                         if ($trailing != '') {
3025                                 $content .= '<div class="body-attach">' . $trailing . '<div class="clear"></div></div>';
3026                         }
3027                 }
3028
3029                 DI::profiler()->stopRecording();
3030                 return $content;
3031         }
3032
3033         /**
3034          * Add link attachment to the content
3035          *
3036          * @param array  $attachments
3037          * @param string $body
3038          * @param string $content
3039          * @param bool   $shared
3040          * @param array  $ignore_links A list of URLs to ignore
3041          * @return string modified content
3042          */
3043         private static function addLinkAttachment(int $uriid, array $attachments, string $body, string $content, bool $shared, array $ignore_links)
3044         {
3045                 DI::profiler()->startRecording('rendering');
3046                 // Don't show a preview when there is a visual attachment (audio or video)
3047                 $types = array_column($attachments['visual'], 'type');
3048                 $preview = !in_array(Post\Media::IMAGE, $types) && !in_array(Post\Media::VIDEO, $types);
3049
3050                 if (!empty($attachments['link'])) {
3051                         foreach ($attachments['link'] as $link) {
3052                                 $found = false;
3053                                 foreach ($ignore_links as $ignore_link) {
3054                                         if (Strings::compareLink($link['url'], $ignore_link)) {
3055                                                 $found = true;
3056                                         }
3057                                 }
3058                                 // @todo Judge between the links to use the one with most information
3059                                 if (!$found && (empty($attachment) || !empty($link['author-name']) ||
3060                                         (empty($attachment['name']) && !empty($link['name'])) ||
3061                                         (empty($attachment['description']) && !empty($link['description'])) ||
3062                                         (empty($attachment['preview']) && !empty($link['preview'])))) {
3063                                         $attachment = $link;
3064                                 }
3065                         }
3066                 }
3067
3068                 if (!empty($attachment)) {
3069                         $data = [
3070                                 'after' => '',
3071                                 'author_name' => $attachment['author-name'] ?? '',
3072                                 'author_url' =>  $attachment['author-url'] ?? '',
3073                                 'description' => $attachment['description'] ?? '',
3074                                 'image' => '',
3075                                 'preview' => '',
3076                                 'provider_name' => $attachment['publisher-name'] ?? '',
3077                                 'provider_url' => $attachment['publisher-url'] ?? '',
3078                                 'text' => '',
3079                                 'title' => $attachment['name'] ?? '',
3080                                 'type' => 'link',
3081                                 'url' => $attachment['url']];
3082
3083                         if ($preview && !empty($attachment['preview'])) {
3084                                 if ($attachment['preview-width'] >= 500) {
3085                                         $data['image'] = Post\Media::getPreviewUrlForId($attachment['id'], Proxy::SIZE_MEDIUM);
3086                                 } else {
3087                                         $data['preview'] = Post\Media::getPreviewUrlForId($attachment['id'], Proxy::SIZE_MEDIUM);
3088                                 }
3089                         }
3090
3091                         if (!empty($data['description']) && !empty($content)) {
3092                                 similar_text($data['description'], $content, $percent);
3093                         } else {
3094                                 $percent = 0;
3095                         }
3096
3097                         if (!empty($data['description']) && (($data['title'] == $data['description']) || ($percent > 95) || (strpos($content, $data['description']) !== false))) {
3098                                 $data['description'] = '';
3099                         }
3100
3101                         if (($data['author_name'] ?? '') == ($data['provider_name'] ?? '')) {
3102                                 $data['author_name'] = '';
3103                         }
3104
3105                         if (($data['author_url'] ?? '') == ($data['provider_url'] ?? '')) {
3106                                 $data['author_url'] = '';
3107                         }
3108                 } elseif (preg_match("/.*(\[attachment.*?\].*?\[\/attachment\]).*/ism", $body, $match)) {
3109                         $data = BBCode::getAttachmentData($match[1]);
3110                 }
3111                 DI::profiler()->stopRecording();
3112
3113                 if (isset($data['url']) && !in_array($data['url'], $ignore_links)) {
3114                         if (!empty($data['description']) || !empty($data['image']) || !empty($data['preview'])) {
3115                                 $parts = parse_url($data['url']);
3116                                 if (!empty($parts['scheme']) && !empty($parts['host'])) {
3117                                         if (empty($data['provider_name'])) {
3118                                                 $data['provider_name'] = $parts['host'];
3119                                         }
3120                                         if (empty($data['provider_url']) || empty(parse_url($data['provider_url'], PHP_URL_SCHEME))) {
3121                                                 $data['provider_url'] = $parts['scheme'] . '://' . $parts['host'];
3122
3123                                                 if (!empty($parts['port'])) {
3124                                                         $data['provider_url'] .= ':' . $parts['port'];
3125                                                 }
3126                                         }
3127                                 }
3128
3129                                 // @todo Use a template
3130                                 $rendered = BBCode::convertAttachment('', BBCode::INTERNAL, false, $data, $uriid);
3131                         } elseif (!self::containsLink($content, $data['url'], Post\Media::HTML)) {
3132                                 $rendered = Renderer::replaceMacros(Renderer::getMarkupTemplate('content/link.tpl'), [
3133                                         '$url'  => $data['url'],
3134                                         '$title' => $data['title'],
3135                                 ]);
3136                         } else {
3137                                 return $content;
3138                         }
3139
3140                         if ($shared) {
3141                                 return str_replace(BBCode::BOTTOM_ANCHOR, BBCode::BOTTOM_ANCHOR . $rendered, $content);
3142                         } else {
3143                                 return $content . $rendered;
3144                         }
3145                 }
3146                 return $content;
3147         }
3148
3149         /**
3150          * Add non visual attachments to the content
3151          *
3152          * @param array $attachments
3153          * @param array $item
3154          * @param string $content
3155          * @return string modified content
3156          */
3157         private static function addNonVisualAttachments(array $attachments, array $item, string $content)
3158         {
3159                 DI::profiler()->startRecording('rendering');
3160                 $trailing = '';
3161                 foreach ($attachments['additional'] as $attachment) {
3162                         if (strpos($item['body'], $attachment['url'])) {
3163                                 continue;
3164                         }
3165
3166                         $author = ['uid' => 0, 'id' => $item['author-id'],
3167                                 'network' => $item['author-network'], 'url' => $item['author-link']];
3168                         $the_url = Contact::magicLinkByContact($author, $attachment['url']);
3169
3170                         $title = Strings::escapeHtml(trim(($attachment['description'] ?? '') ?: $attachment['url']));
3171
3172                         if (!empty($attachment['size'])) {
3173                                 $title .= ' ' . $attachment['size'] . ' ' . DI::l10n()->t('bytes');
3174                         }
3175
3176                         /// @todo Use a template
3177                         $icon = '<div class="attachtype icon s22 type-' . $attachment['filetype'] . ' subtype-' . $attachment['subtype'] . '"></div>';
3178                         $trailing .= '<a href="' . strip_tags($the_url) . '" title="' . $title . '" class="attachlink" target="_blank" rel="noopener noreferrer" >' . $icon . '</a>';
3179                 }
3180
3181                 if ($trailing != '') {
3182                         $content .= '<div class="body-attach">' . $trailing . '<div class="clear"></div></div>';
3183                 }
3184
3185                 DI::profiler()->stopRecording();
3186                 return $content;
3187         }
3188
3189         private static function addQuestions(array $item, string $content)
3190         {
3191                 DI::profiler()->startRecording('rendering');
3192                 if (!empty($item['question-id'])) {
3193                         $question = [
3194                                 'id'       => $item['question-id'],
3195                                 'multiple' => $item['question-multiple'],
3196                                 'voters'   => $item['question-voters'],
3197                                 'endtime'  => $item['question-end-time']
3198                         ];
3199
3200                         $options = Post\QuestionOption::getByURIId($item['uri-id']);
3201                         foreach ($options as $key => $option) {
3202                                 $percent = $question['voters'] ? ($option['replies'] / $question['voters'] * 100) : 0;
3203
3204                                 $options[$key]['percent'] = $percent;
3205                                 $options[$key]['vote']    = DI::l10n()->t('%s (%d%s, %d votes)', $option['name'], round($percent, 1), '%', $option['replies']);
3206                         }
3207
3208                         $content .= Renderer::replaceMacros(Renderer::getMarkupTemplate('content/question.tpl'), [
3209                                 '$question' => $question,
3210                                 '$options'  => $options,
3211                                 '$summary'  => DI::l10n()->t('%d voters. Poll end: %s', $question['voters'], Temporal::getRelativeDate($question['endtime'])),
3212                         ]);
3213         }
3214                 DI::profiler()->stopRecording();
3215                 return $content;
3216         }
3217
3218         /**
3219          * get private link for item
3220          *
3221          * @param array $item
3222          * @return boolean|array False if item has not plink, otherwise array('href'=>plink url, 'title'=>translated title)
3223          * @throws \Exception
3224          */
3225         public static function getPlink($item)
3226         {
3227                 if (!empty($item['plink']) && Network::isValidHttpUrl($item['plink'])) {
3228                         $plink = $item['plink'];
3229                 } elseif (!empty($item['uri']) && Network::isValidHttpUrl($item['uri']) && !Network::isLocalLink($item['uri'])) {
3230                         $plink = $item['uri'];
3231                 }
3232
3233                 if (local_user()) {
3234                         $ret = [
3235                                 'href' => "display/" . $item['guid'],
3236                                 'orig' => "display/" . $item['guid'],
3237                                 'title' => DI::l10n()->t('View on separate page'),
3238                                 'orig_title' => DI::l10n()->t('View on separate page'),
3239                         ];
3240
3241                         if (!empty($plink) && ($item['private'] == self::PRIVATE)) {
3242                                 $author = ['uid' => 0, 'id' => $item['author-id'],
3243                                         'network' => $item['author-network'], 'url' => $item['author-link']];
3244                                 $plink = Contact::magicLinkByContact($author, $plink);
3245                         }
3246
3247                         if (!empty($plink)) {
3248                                 $ret['href'] = DI::baseUrl()->remove($plink);
3249                                 $ret['title'] = DI::l10n()->t('Link to source');
3250                         }
3251                 } elseif (!empty($plink) && ($item['private'] != self::PRIVATE)) {
3252                         $ret = [
3253                                 'href' => $plink,
3254                                 'orig' => $plink,
3255                                 'title' => DI::l10n()->t('Link to source'),
3256                                 'orig_title' => DI::l10n()->t('Link to source'),
3257                         ];
3258                 } else {
3259                         $ret = [];
3260                 }
3261
3262                 return $ret;
3263         }
3264
3265         /**
3266          * Does the given uri-id belongs to a post that is sent as starting post to a forum?
3267          *
3268          * @param int $uri_id
3269          *
3270          * @return boolean "true" when it is a forum post
3271          */
3272         public static function isForumPost(int $uri_id)
3273         {
3274                 foreach (Tag::getByURIId($uri_id, [Tag::EXCLUSIVE_MENTION]) as $tag) {
3275                         if (DBA::exists('contact', ['uid' => 0, 'nurl' => Strings::normaliseLink($tag['url']), 'contact-type' => Contact::TYPE_COMMUNITY])) {
3276                                 return true;
3277                         }
3278                 }
3279                 return false;
3280         }
3281
3282         /**
3283          * Search item id for given URI or plink
3284          *
3285          * @param string $uri
3286          * @param integer $uid
3287          *
3288          * @return integer item id
3289          */
3290         public static function searchByLink($uri, $uid = 0)
3291         {
3292                 $ssl_uri = str_replace('http://', 'https://', $uri);
3293                 $uris = [$uri, $ssl_uri, Strings::normaliseLink($uri)];
3294
3295                 $item = Post::selectFirst(['id'], ['uri' => $uris, 'uid' => $uid]);
3296                 if (DBA::isResult($item)) {
3297                         return $item['id'];
3298                 }
3299
3300                 $item = Post::selectFirst(['id'], ['plink' => $uris, 'uid' => $uid]);
3301                 if (DBA::isResult($item)) {
3302                         return $item['id'];
3303                 }
3304
3305                 return 0;
3306         }
3307
3308         /**
3309          * Return the URI for a link to the post
3310          *
3311          * @param string $uri URI or link to post
3312          *
3313          * @return string URI
3314          */
3315         public static function getURIByLink(string $uri)
3316         {
3317                 $ssl_uri = str_replace('http://', 'https://', $uri);
3318                 $uris = [$uri, $ssl_uri, Strings::normaliseLink($uri)];
3319
3320                 $item = Post::selectFirst(['uri'], ['uri' => $uris]);
3321                 if (DBA::isResult($item)) {
3322                         return $item['uri'];
3323                 }
3324
3325                 $item = Post::selectFirst(['uri'], ['plink' => $uris]);
3326                 if (DBA::isResult($item)) {
3327                         return $item['uri'];
3328                 }
3329
3330                 return '';
3331         }
3332
3333         /**
3334          * Fetches item for given URI or plink
3335          *
3336          * @param string $uri
3337          * @param integer $uid
3338          *
3339          * @return integer item id
3340          */
3341         public static function fetchByLink(string $uri, int $uid = 0)
3342         {
3343                 Logger::info('Trying to fetch link', ['uid' => $uid, 'uri' => $uri]);
3344                 $item_id = self::searchByLink($uri, $uid);
3345                 if (!empty($item_id)) {
3346                         Logger::info('Link found', ['uid' => $uid, 'uri' => $uri, 'id' => $item_id]);
3347                         return $item_id;
3348                 }
3349
3350                 $hookData = [
3351                         'uri'     => $uri,
3352                         'uid'     => $uid,
3353                         'item_id' => null,
3354                 ];
3355
3356                 Hook::callAll('item_by_link', $hookData);
3357
3358                 if (isset($hookData['item_id'])) {
3359                         return is_numeric($hookData['item_id']) ? $hookData['item_id'] : 0;
3360                 }
3361
3362                 if ($fetched_uri = ActivityPub\Processor::fetchMissingActivity($uri)) {
3363                         $item_id = self::searchByLink($fetched_uri, $uid);
3364                 } else {
3365                         $item_id = Diaspora::fetchByURL($uri);
3366                 }
3367
3368                 if (!empty($item_id)) {
3369                         Logger::info('Link fetched', ['uid' => $uid, 'uri' => $uri, 'id' => $item_id]);
3370                         return $item_id;
3371                 }
3372
3373                 Logger::info('Link not found', ['uid' => $uid, 'uri' => $uri]);
3374                 return 0;
3375         }
3376
3377         /**
3378          * Return share data from an item array (if the item is shared item)
3379          * We are providing the complete Item array, because at some time in the future
3380          * we hopefully will define these values not in the body anymore but in some item fields.
3381          * This function is meant to replace all similar functions in the system.
3382          *
3383          * @param array $item
3384          *
3385          * @return array with share information
3386          */
3387         public static function getShareArray($item)
3388         {
3389                 if (!preg_match("/(.*?)\[share(.*?)\]\s?(.*?)\s?\[\/share\]\s?/ism", $item['body'], $matches)) {
3390                         return [];
3391                 }
3392
3393                 $attribute_string = $matches[2];
3394                 $attributes = ['comment' => trim($matches[1]), 'shared' => trim($matches[3])];
3395                 foreach (['author', 'profile', 'avatar', 'guid', 'posted', 'link'] as $field) {
3396                         if (preg_match("/$field=(['\"])(.+?)\\1/ism", $attribute_string, $matches)) {
3397                                 $attributes[$field] = trim(html_entity_decode($matches[2] ?? '', ENT_QUOTES, 'UTF-8'));
3398                         }
3399                 }
3400                 return $attributes;
3401         }
3402
3403         /**
3404          * Fetch item information for shared items from the original items and adds it.
3405          *
3406          * @param array $item
3407          *
3408          * @return array item array with data from the original item
3409          */
3410         public static function addShareDataFromOriginal(array $item)
3411         {
3412                 $shared = self::getShareArray($item);
3413                 if (empty($shared)) {
3414                         return $item;
3415                 }
3416
3417                 // Real reshares always have got a GUID.
3418                 if (empty($shared['guid'])) {
3419                         return $item;
3420                 }
3421
3422                 $uid = $item['uid'] ?? 0;
3423
3424                 // first try to fetch the item via the GUID. This will work for all reshares that had been created on this system
3425                 $shared_item = Post::selectFirst(['title', 'body'], ['guid' => $shared['guid'], 'uid' => [0, $uid]]);
3426                 if (!DBA::isResult($shared_item)) {
3427                         if (empty($shared['link'])) {
3428                                 return $item;
3429                         }
3430
3431                         // Otherwhise try to find (and possibly fetch) the item via the link. This should work for Diaspora and ActivityPub posts
3432                         $id = self::fetchByLink($shared['link'] ?? '', $uid);
3433                         if (empty($id)) {
3434                                 Logger::info('Original item not found', ['url' => $shared['link'] ?? '', 'callstack' => System::callstack()]);
3435                                 return $item;
3436                         }
3437
3438                         $shared_item = Post::selectFirst(['title', 'body'], ['id' => $id]);
3439                         if (!DBA::isResult($shared_item)) {
3440                                 return $item;
3441                         }
3442                         Logger::info('Got shared data from url', ['url' => $shared['link'], 'callstack' => System::callstack()]);
3443                 } else {
3444                         Logger::info('Got shared data from guid', ['guid' => $shared['guid'], 'callstack' => System::callstack()]);
3445                 }
3446
3447                 if (!empty($shared_item['title'])) {
3448                         $body = '[h3]' . $shared_item['title'] . "[/h3]\n" . $shared_item['body'];
3449                         unset($shared_item['title']);
3450                 } else {
3451                         $body = $shared_item['body'];
3452                 }
3453
3454                 $item['body'] = preg_replace("/\[share ([^\[\]]*)\].*\[\/share\]/ism", '[share $1]' . str_replace('$', '\$', $body) . '[/share]', $item['body']);
3455                 unset($shared_item['body']);
3456
3457                 return array_merge($item, $shared_item);
3458         }
3459
3460         /**
3461          * Check a prospective item array against user-level permissions
3462          *
3463          * @param array $item Expected keys: uri, gravity, and
3464          *                    author-link if is author-id is set,
3465          *                    owner-link if is owner-id is set,
3466          *                    causer-link if is causer-id is set.
3467          * @param int   $user_id Local user ID
3468          * @return bool
3469          * @throws \Exception
3470          */
3471         protected static function isAllowedByUser(array $item, int $user_id)
3472         {
3473                 if (!empty($item['author-id']) && Contact\User::isBlocked($item['author-id'], $user_id)) {
3474                         Logger::notice('Author is blocked by user', ['author-link' => $item['author-link'], 'uid' => $user_id, 'item-uri' => $item['uri']]);
3475                         return false;
3476                 }
3477
3478                 if (!empty($item['owner-id']) && Contact\User::isBlocked($item['owner-id'], $user_id)) {
3479                         Logger::notice('Owner is blocked by user', ['owner-link' => $item['owner-link'], 'uid' => $user_id, 'item-uri' => $item['uri']]);
3480                         return false;
3481                 }
3482
3483                 // The causer is set during a thread completion, for example because of a reshare. It countains the responsible actor.
3484                 if (!empty($item['causer-id']) && Contact\User::isBlocked($item['causer-id'], $user_id)) {
3485                         Logger::notice('Causer is blocked by user', ['causer-link' => $item['causer-link'] ?? $item['causer-id'], 'uid' => $user_id, 'item-uri' => $item['uri']]);
3486                         return false;
3487                 }
3488
3489                 if (!empty($item['causer-id']) && ($item['gravity'] === GRAVITY_PARENT) && Contact\User::isIgnored($item['causer-id'], $user_id)) {
3490                         Logger::notice('Causer is ignored by user', ['causer-link' => $item['causer-link'] ?? $item['causer-id'], 'uid' => $user_id, 'item-uri' => $item['uri']]);
3491                         return false;
3492                 }
3493
3494                 return true;
3495         }
3496
3497         /**
3498          * Improve the data in shared posts
3499          *
3500          * @param array $item
3501          * @return string body
3502          */
3503         public static function improveSharedDataInBody(array $item)
3504         {
3505                 $shared = BBCode::fetchShareAttributes($item['body']);
3506                 if (empty($shared['link'])) {
3507                         return $item['body'];
3508                 }
3509
3510                 $id = self::fetchByLink($shared['link']);
3511                 Logger::info('Fetched shared post', ['uri-id' => $item['uri-id'], 'id' => $id, 'author' => $shared['profile'], 'url' => $shared['link'], 'guid' => $shared['guid'], 'callstack' => System::callstack()]);
3512                 if (!$id) {
3513                         return $item['body'];
3514                 }
3515
3516                 $shared_item = Post::selectFirst(['author-name', 'author-link', 'author-avatar', 'plink', 'created', 'guid', 'title', 'body'], ['id' => $id]);
3517                 if (!DBA::isResult($shared_item)) {
3518                         return $item['body'];
3519                 }
3520
3521                 $shared_content = BBCode::getShareOpeningTag($shared_item['author-name'], $shared_item['author-link'], $shared_item['author-avatar'], $shared_item['plink'], $shared_item['created'], $shared_item['guid']);
3522
3523                 if (!empty($shared_item['title'])) {
3524                         $shared_content .= '[h3]'.$shared_item['title'].'[/h3]'."\n";
3525                 }
3526
3527                 $shared_content .= $shared_item['body'];
3528
3529                 $item['body'] = preg_replace("/\[share.*?\](.*)\[\/share\]/ism", $shared_content . '[/share]', $item['body']);
3530                 Logger::info('New shared data', ['uri-id' => $item['uri-id'], 'id' => $id, 'shared_item' => $shared_item]);
3531                 return $item['body'];
3532         }
3533 }