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