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                 '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', '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                         '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::notice('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::notice('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 top-level parent data for the given item array
 706          *
 707          * @param array $item
 708          * @return array item array with parent data
 709          * @throws \Exception
 710          */
 711         private static function getTopLevelParent(array $item): array
 712         {
 713                 $fields = ['uid', 'uri', 'parent-uri', 'id', 'deleted',
 714                         'uri-id', 'parent-uri-id',
 715                         'allow_cid', 'allow_gid', 'deny_cid', 'deny_gid',
 716                         'wall', 'private', 'origin', 'author-id'];
 717                 $condition = ['uri-id' => [$item['thr-parent-id'], $item['parent-uri-id']], 'uid' => $item['uid']];
 718                 $params = ['order' => ['id' => false]];
 719                 $parent = Post::selectFirst($fields, $condition, $params);
 720
 721                 if (!DBA::isResult($parent) && Post::exists(['uri-id' => [$item['thr-parent-id'], $item['parent-uri-id']], 'uid' => 0])) {
 722                         $stored = Item::storeForUserByUriId($item['thr-parent-id'], $item['uid'], ['post-reason' => Item::PR_COMPLETION]);
 723                         if (!$stored && ($item['thr-parent-id'] != $item['parent-uri-id'])) {
 724                                 $stored = Item::storeForUserByUriId($item['parent-uri-id'], $item['uid'], ['post-reason' => Item::PR_COMPLETION]);
 725                         }
 726                         if ($stored) {
 727                                 Logger::info('Stored thread parent item for user', ['uri-id' => $item['thr-parent-id'], 'uid' => $item['uid'], 'stored' => $stored]);
 728                                 $parent = Post::selectFirst($fields, $condition, $params);
 729                         }
 730                 }
 731
 732                 if (!DBA::isResult($parent)) {
 733                         Logger::notice('item parent was not found - ignoring item', ['uri-id' => $item['uri-id'], 'thr-parent-id' => $item['thr-parent-id'], 'uid' => $item['uid'], 'callstack' => System::callstack(20)]);
 734                         return [];
 735                 }
 736
 737                 if ($parent['uri-id'] == $parent['parent-uri-id']) {
 738                         return $parent;
 739                 }
 740
 741                 $condition = ['uri-id' => $parent['parent-uri-id'],
 742                         'parent-uri-id' => $parent['parent-uri-id'],
 743                         'uid' => $parent['uid']];
 744                 $params = ['order' => ['id' => false]];
 745                 $toplevel_parent = Post::selectFirst($fields, $condition, $params);
 746
 747                 if (!DBA::isResult($toplevel_parent) && $item['origin']) {
 748                         $stored = Item::storeForUserByUriId($item['parent-uri-id'], $item['uid'], ['post-reason' => Item::PR_COMPLETION]);
 749                         Logger::info('Stored parent item for user', ['uri-id' => $item['parent-uri-id'], 'uid' => $item['uid'], 'stored' => $stored]);
 750                         $toplevel_parent = Post::selectFirst($fields, $condition, $params);
 751                 }
 752
 753                 if (!DBA::isResult($toplevel_parent)) {
 754                         Logger::notice('item top level parent was not found - ignoring item', ['parent-uri-id' => $parent['parent-uri-id'], 'uid' => $parent['uid']]);
 755                         return [];
 756                 }
 757
 758                 return $toplevel_parent;
 759         }
 760
 761         /**
 762          * Get the gravity for the given item array
 763          *
 764          * @param array $item
 765          * @return integer gravity
 766          */
 767         private static function getGravity(array $item): int
 768         {
 769                 $activity = DI::activity();
 770
 771                 if (isset($item['gravity'])) {
 772                         return intval($item['gravity']);
 773                 } elseif ($item['parent-uri-id'] === $item['uri-id']) {
 774                         return GRAVITY_PARENT;
 775                 } elseif ($activity->match($item['verb'], Activity::POST)) {
 776                         return GRAVITY_COMMENT;
 777                 } elseif ($activity->match($item['verb'], Activity::FOLLOW)) {
 778                         return GRAVITY_ACTIVITY;
 779                 } elseif ($activity->match($item['verb'], Activity::ANNOUNCE)) {
 780                         return GRAVITY_ACTIVITY;
 781                 }
 782
 783                 Logger::info('Unknown gravity for verb', ['verb' => $item['verb']]);
 784                 return GRAVITY_UNKNOWN;   // Should not happen
 785         }
 786
 787         /**
 788          * Inserts item record
 789          *
 790          * @param array $item Item array to be inserted
 791          * @param int   $notify Notification (type?)
 792          * @param bool  $post_local (???)
 793          * @return int Zero means error, otherwise primary key (id) is being returned
 794          */
 795         public static function insert(array $item, int $notify = 0, bool $post_local = true): int
 796         {
 797                 $orig_item = $item;
 798
 799                 $priority = PRIORITY_HIGH;
 800
 801                 // If it is a posting where users should get notifications, then define it as wall posting
 802                 if ($notify) {
 803                         $item['wall'] = 1;
 804                         $item['origin'] = 1;
 805                         $item['network'] = Protocol::DFRN;
 806                         $item['protocol'] = Conversation::PARCEL_DIRECT;
 807                         $item['direction'] = Conversation::PUSH;
 808
 809                         if (is_int($notify) && in_array($notify, PRIORITIES)) {
 810                                 $priority = $notify;
 811                         }
 812                 } else {
 813                         $item['network'] = trim(($item['network'] ?? '') ?: Protocol::PHANTOM);
 814                 }
 815
 816                 $uid = intval($item['uid']);
 817
 818                 $item['guid'] = self::guid($item, $notify);
 819                 $item['uri'] = substr(trim($item['uri'] ?? '') ?: self::newURI($item['guid']), 0, 255);
 820
 821                 // Store URI data
 822                 $item['uri-id'] = ItemURI::insert(['uri' => $item['uri'], 'guid' => $item['guid']]);
 823
 824                 // Backward compatibility: parent-uri used to be the direct parent uri.
 825                 // If it is provided without a thr-parent, it probably is the old behavior.
 826                 if (empty($item['thr-parent']) || empty($item['parent-uri'])) {
 827                         $item['thr-parent'] = trim($item['thr-parent'] ?? $item['parent-uri'] ?? $item['uri']);
 828                         $item['parent-uri'] = $item['thr-parent'];
 829                 }
 830
 831                 $item['thr-parent-id'] = ItemURI::getIdByURI($item['thr-parent']);
 832                 $item['parent-uri-id'] = ItemURI::getIdByURI($item['parent-uri']);
 833
 834                 // Store conversation data
 835                 $source = $item['source'] ?? '';
 836                 unset($item['conversation-uri']);
 837                 unset($item['conversation-href']);
 838                 unset($item['source']);
 839
 840                 /*
 841                  * Do we already have this item?
 842                  * We have to check several networks since Friendica posts could be repeated
 843                  * via OStatus (maybe Diasporsa as well)
 844                  */
 845                 $duplicate = self::getDuplicateID($item);
 846                 if ($duplicate) {
 847                         return $duplicate;
 848                 }
 849
 850                 // Additional duplicate checks
 851                 /// @todo Check why the first duplication check returns the item number and the second a 0
 852                 if (self::isDuplicate($item)) {
 853                         return 0;
 854                 }
 855
 856                 if (!isset($item['post-type'])) {
 857                         $item['post-type'] = empty($item['title']) ? self::PT_NOTE : self::PT_ARTICLE;
 858                 }
 859
 860                 $item['wall']          = intval($item['wall'] ?? 0);
 861                 $item['extid']         = trim($item['extid'] ?? '');
 862                 $item['author-name']   = trim($item['author-name'] ?? '');
 863                 $item['author-link']   = trim($item['author-link'] ?? '');
 864                 $item['author-avatar'] = trim($item['author-avatar'] ?? '');
 865                 $item['owner-name']    = trim($item['owner-name'] ?? '');
 866                 $item['owner-link']    = trim($item['owner-link'] ?? '');
 867                 $item['owner-avatar']  = trim($item['owner-avatar'] ?? '');
 868                 $item['received']      = (isset($item['received'])  ? DateTimeFormat::utc($item['received'])  : DateTimeFormat::utcNow());
 869                 $item['created']       = (isset($item['created'])   ? DateTimeFormat::utc($item['created'])   : $item['received']);
 870                 $item['edited']        = (isset($item['edited'])    ? DateTimeFormat::utc($item['edited'])    : $item['created']);
 871                 $item['changed']       = (isset($item['changed'])   ? DateTimeFormat::utc($item['changed'])   : $item['created']);
 872                 $item['commented']     = (isset($item['commented']) ? DateTimeFormat::utc($item['commented']) : $item['created']);
 873                 $item['title']         = substr(trim($item['title'] ?? ''), 0, 255);
 874                 $item['location']      = trim($item['location'] ?? '');
 875                 $item['coord']         = trim($item['coord'] ?? '');
 876                 $item['visible']       = (isset($item['visible']) ? intval($item['visible']) : 1);
 877                 $item['deleted']       = 0;
 878                 $item['verb']          = trim($item['verb'] ?? '');
 879                 $item['object-type']   = trim($item['object-type'] ?? '');
 880                 $item['object']        = trim($item['object'] ?? '');
 881                 $item['target-type']   = trim($item['target-type'] ?? '');
 882                 $item['target']        = trim($item['target'] ?? '');
 883                 $item['plink']         = substr(trim($item['plink'] ?? ''), 0, 255);
 884                 $item['allow_cid']     = trim($item['allow_cid'] ?? '');
 885                 $item['allow_gid']     = trim($item['allow_gid'] ?? '');
 886                 $item['deny_cid']      = trim($item['deny_cid'] ?? '');
 887                 $item['deny_gid']      = trim($item['deny_gid'] ?? '');
 888                 $item['private']       = intval($item['private'] ?? self::PUBLIC);
 889                 $item['body']          = trim($item['body'] ?? '');
 890                 $item['raw-body']      = trim($item['raw-body'] ?? $item['body']);
 891                 $item['app']           = trim($item['app'] ?? '');
 892                 $item['origin']        = intval($item['origin'] ?? 0);
 893                 $item['postopts']      = trim($item['postopts'] ?? '');
 894                 $item['resource-id']   = trim($item['resource-id'] ?? '');
 895                 $item['event-id']      = intval($item['event-id'] ?? 0);
 896                 $item['inform']        = trim($item['inform'] ?? '');
 897                 $item['file']          = trim($item['file'] ?? '');
 898
 899                 // Communities aren't working with the Diaspora protoccol
 900                 if (($uid != 0) && ($item['network'] == Protocol::DIASPORA)) {
 901                         $user = User::getById($uid, ['account-type']);
 902                         if ($user['account-type'] == Contact::TYPE_COMMUNITY) {
 903                                 Logger::info('Community posts are not supported via Diaspora');
 904                                 return 0;
 905                         }
 906                 }
 907
 908                 // Items cannot be stored before they happen ...
 909                 if ($item['created'] > DateTimeFormat::utcNow()) {
 910                         $item['created'] = DateTimeFormat::utcNow();
 911                 }
 912
 913                 // We haven't invented time travel by now.
 914                 if ($item['edited'] > DateTimeFormat::utcNow()) {
 915                         $item['edited'] = DateTimeFormat::utcNow();
 916                 }
 917
 918                 $item['plink'] = ($item['plink'] ?? '') ?: DI::baseUrl() . '/display/' . urlencode($item['guid']);
 919
 920                 $item['gravity'] = self::getGravity($item);
 921
 922                 $item['language'] = self::getLanguage($item);
 923
 924                 $default = ['url' => $item['author-link'], 'name' => $item['author-name'],
 925                         'photo' => $item['author-avatar'], 'network' => $item['network']];
 926                 $item['author-id'] = ($item['author-id'] ?? 0) ?: Contact::getIdForURL($item['author-link'], 0, null, $default);
 927
 928                 $default = ['url' => $item['owner-link'], 'name' => $item['owner-name'],
 929                         'photo' => $item['owner-avatar'], 'network' => $item['network']];
 930                 $item['owner-id'] = ($item['owner-id'] ?? 0) ?: Contact::getIdForURL($item['owner-link'], 0, null, $default);
 931
 932                 $item['post-reason'] = self::getPostReason($item);
 933
 934                 // Ensure that there is an avatar cache
 935                 Contact::checkAvatarCache($item['author-id']);
 936                 Contact::checkAvatarCache($item['owner-id']);
 937
 938                 $item['contact-id'] = self::contactId($item);
 939
 940                 if (!empty($item['direction']) && in_array($item['direction'], [Conversation::PUSH, Conversation::RELAY]) &&
 941                         empty($item['origin']) && self::isTooOld($item)) {
 942                         Logger::info('Item is too old', ['item' => $item]);
 943                         return 0;
 944                 }
 945
 946                 if (!self::isValid($item)) {
 947                         return 0;
 948                 }
 949
 950                 if ($item['gravity'] !== GRAVITY_PARENT) {
 951                         $toplevel_parent = self::getTopLevelParent($item);
 952                         if (empty($toplevel_parent)) {
 953                                 return 0;
 954                         }
 955
 956                         // If the thread originated from this node, we check the permission against the thread starter
 957                         $condition = ['uri-id' => $toplevel_parent['uri-id'], 'wall' => true];
 958                         $localTopLevelParent = Post::selectFirst(['uid'], $condition);
 959                         if (!empty($localTopLevelParent['uid']) && !self::isAllowedByUser($item, $localTopLevelParent['uid'])) {
 960                                 return 0;
 961                         }
 962
 963                         $parent_id             = $toplevel_parent['id'];
 964                         $item['parent-uri']    = $toplevel_parent['uri'];
 965                         $item['parent-uri-id'] = $toplevel_parent['uri-id'];
 966                         $item['deleted']       = $toplevel_parent['deleted'];
 967
 968                         // Reshares have to keep their permissions to allow forums to work
 969                         if (!$item['origin'] || ($item['verb'] != Activity::ANNOUNCE)) {
 970                                 $item['allow_cid']     = $toplevel_parent['allow_cid'];
 971                                 $item['allow_gid']     = $toplevel_parent['allow_gid'];
 972                                 $item['deny_cid']      = $toplevel_parent['deny_cid'];
 973                                 $item['deny_gid']      = $toplevel_parent['deny_gid'];
 974                         }
 975
 976                         $parent_origin         = $toplevel_parent['origin'];
 977
 978                         // Don't federate received participation messages
 979                         if ($item['verb'] != Activity::FOLLOW) {
 980                                 $item['wall'] = $toplevel_parent['wall'];
 981                         } else {
 982                                 $item['wall'] = false;
 983                                 // Participations are technical messages, so they are set to "seen" automatically
 984                                 $item['unseen'] = false;
 985                         }
 986
 987                         /*
 988                          * If the parent is private, force privacy for the entire conversation
 989                          * This differs from the above settings as it subtly allows comments from
 990                          * email correspondents to be private even if the overall thread is not.
 991                          */
 992                         if ($toplevel_parent['private']) {
 993                                 $item['private'] = $toplevel_parent['private'];
 994                         }
 995
 996                         // If its a post that originated here then tag the thread as "mention"
 997                         if ($item['origin'] && $item['uid']) {
 998                                 DBA::update('post-thread-user', ['mention' => true], ['uri-id' => $item['parent-uri-id'], 'uid' => $item['uid']]);
 999                                 Logger::info('tagged thread as mention', ['parent' => $parent_id, 'parent-uri-id' => $item['parent-uri-id'], 'uid' => $item['uid']]);
1000                         }
1001
1002                         // Update the contact relations
1003                         Contact\Relation::store($toplevel_parent['author-id'], $item['author-id'], $item['created']);
1004                 } else {
1005                         $parent_id = 0;
1006                         $parent_origin = $item['origin'];
1007
1008                         if ($item['wall'] && empty($item['conversation'])) {
1009                                 $item['conversation'] = $item['parent-uri'] . '#context';
1010                         }
1011                 }
1012
1013                 $item['parent-uri-id'] = ItemURI::getIdByURI($item['parent-uri']);
1014                 $item['thr-parent-id'] = ItemURI::getIdByURI($item['thr-parent']);
1015
1016                 if (!empty($item['conversation']) && empty($item['conversation-id'])) {
1017                         $item['conversation-id'] = ItemURI::getIdByURI($item['conversation']);
1018                 }
1019
1020                 // Is this item available in the global items (with uid=0)?
1021                 if ($item['uid'] == 0) {
1022                         $item['global'] = true;
1023
1024                         // Set the global flag on all items if this was a global item entry
1025                         Post::update(['global' => true], ['uri-id' => $item['uri-id']]);
1026                 } else {
1027                         $item['global'] = Post::exists(['uid' => 0, 'uri-id' => $item['uri-id']]);
1028                 }
1029
1030                 // ACL settings
1031                 if (!empty($item['allow_cid'] . $item['allow_gid'] . $item['deny_cid'] . $item['deny_gid'])) {
1032                         $item['private'] = self::PRIVATE;
1033                 }
1034
1035                 if ($notify && $post_local) {
1036                         $item['edit'] = false;
1037                         $item['parent'] = $parent_id;
1038
1039                         // Trigger automatic reactions for addons
1040                         if (!isset($item['api_source'])) {
1041                                 $item['api_source'] = true;
1042                         }
1043
1044                         // We have to tell the hooks who we are - this really should be improved
1045                         if (!local_user()) {
1046                                 $_SESSION['authenticated'] = true;
1047                                 $_SESSION['uid'] = $uid;
1048                                 $dummy_session = true;
1049                         } else {
1050                                 $dummy_session = false;
1051                         }
1052
1053                         Hook::callAll('post_local', $item);
1054
1055                         if ($dummy_session) {
1056                                 unset($_SESSION['authenticated']);
1057                                 unset($_SESSION['uid']);
1058                         }
1059                 } elseif (!$notify) {
1060                         Hook::callAll('post_remote', $item);
1061                 }
1062
1063                 if (!empty($item['cancel'])) {
1064                         Logger::notice('post cancelled by addon.');
1065                         return 0;
1066                 }
1067
1068                 if (empty($item['vid']) && !empty($item['verb'])) {
1069                         $item['vid'] = Verb::getID($item['verb']);
1070                 }
1071
1072                 // Creates or assigns the permission set
1073                 $item['psid'] = DI::permissionSet()->selectOrCreate(
1074                         DI::permissionSetFactory()->createFromString(
1075                                 $item['uid'],
1076                                 $item['allow_cid'],
1077                                 $item['allow_gid'],
1078                                 $item['deny_cid'],
1079                                 $item['deny_gid']
1080                 ))->id;
1081
1082                 if (!empty($item['extid'])) {
1083                         $item['external-id'] = ItemURI::getIdByURI($item['extid']);
1084                 }
1085
1086                 if ($item['verb'] == Activity::ANNOUNCE) {
1087                         self::setOwnerforResharedItem($item);
1088                 }
1089
1090                 if (isset($item['attachments'])) {
1091                         foreach ($item['attachments'] as $attachment) {
1092                                 $attachment['uri-id'] = $item['uri-id'];
1093                                 Post\Media::insert($attachment);
1094                         }
1095                         unset($item['attachments']);
1096                 }
1097
1098                 Post\Media::insertFromAttachmentData($item['uri-id'], $item['body']);
1099
1100                 // Remove all media attachments from the body and store them in the post-media table
1101                 $item['raw-body'] = Post\Media::insertFromBody($item['uri-id'], $item['raw-body']);
1102                 $item['raw-body'] = self::setHashtags($item['raw-body']);
1103
1104                 if (!DBA::exists('contact', ['id' => $item['author-id'], 'network' => Protocol::DFRN])) {
1105                         Post\Media::insertFromRelevantUrl($item['uri-id'], $item['raw-body']);
1106                 }
1107
1108                 // Check for hashtags in the body and repair or add hashtag links
1109                 $item['body'] = self::setHashtags($item['body']);
1110
1111                 $notify_type = Delivery::POST;
1112
1113                 // Filling item related side tables
1114                 if (!empty($item['attach'])) {
1115                         Post\Media::insertFromAttachment($item['uri-id'], $item['attach']);
1116                 }
1117
1118                 if (empty($item['event-id'])) {
1119                         unset($item['event-id']);
1120
1121                         $ev = Event::fromBBCode($item['body']);
1122                         if ((!empty($ev['desc']) || !empty($ev['summary'])) && !empty($ev['start'])) {
1123                                 Logger::info('Event found.');
1124                                 $ev['cid']       = $item['contact-id'];
1125                                 $ev['uid']       = $item['uid'];
1126                                 $ev['uri']       = $item['uri'];
1127                                 $ev['edited']    = $item['edited'];
1128                                 $ev['private']   = $item['private'];
1129                                 $ev['guid']      = $item['guid'];
1130                                 $ev['plink']     = $item['plink'];
1131                                 $ev['network']   = $item['network'];
1132                                 $ev['protocol']  = $item['protocol'] ?? Conversation::PARCEL_UNKNOWN;
1133                                 $ev['direction'] = $item['direction'] ?? Conversation::UNKNOWN;
1134                                 $ev['source']    = $item['source'] ?? '';
1135
1136                                 $event = DBA::selectFirst('event', ['id'], ['uri' => $item['uri'], 'uid' => $item['uid']]);
1137                                 if (DBA::isResult($event)) {
1138                                         $ev['id'] = $event['id'];
1139                                 }
1140
1141                                 $event_id = Event::store($ev);
1142                                 $item = Event::getItemArrayForImportedId($event_id, $item);
1143
1144                                 Logger::info('Event was stored', ['id' => $event_id]);
1145                         }
1146                 }
1147
1148                 if (empty($item['causer-id'])) {
1149                         unset($item['causer-id']);
1150                 }
1151
1152                 if (in_array($item['network'], [Protocol::ACTIVITYPUB, Protocol::DFRN])) {
1153                         $content_warning = BBCode::getAbstract($item['body'], Protocol::ACTIVITYPUB);
1154                         if (!empty($content_warning) && empty($item['content-warning'])) {
1155                                 $item['content-warning'] = BBCode::toPlaintext($content_warning);
1156                         }
1157                 }
1158
1159                 Post::insert($item['uri-id'], $item);
1160
1161                 if ($item['gravity'] == GRAVITY_PARENT) {
1162                         Post\Thread::insert($item['uri-id'], $item);
1163                 }
1164
1165                 if (!in_array($item['verb'], self::ACTIVITIES)) {
1166                         Post\Content::insert($item['uri-id'], $item);
1167                 }
1168
1169                 // Create Diaspora signature
1170                 if ($item['origin'] && empty($item['diaspora_signed_text']) && ($item['gravity'] != GRAVITY_PARENT)) {
1171                         $signed = Diaspora::createCommentSignature($item);
1172                         if (!empty($signed)) {
1173                                 $item['diaspora_signed_text'] = json_encode($signed);
1174                         }
1175                 }
1176
1177                 if (!empty($item['diaspora_signed_text'])) {
1178                         DBA::replace('diaspora-interaction', ['uri-id' => $item['uri-id'], 'interaction' => $item['diaspora_signed_text']]);
1179                 }
1180
1181                 // Attached file links
1182                 if (!empty($item['file'])) {
1183                         Post\Category::storeTextByURIId($item['uri-id'], $item['uid'], $item['file']);
1184                 }
1185
1186                 // Delivery relevant data
1187                 $delivery_data = Post\DeliveryData::extractFields($item);
1188
1189                 if (!empty($item['origin']) || !empty($item['wall']) || !empty($delivery_data['postopts']) || !empty($delivery_data['inform'])) {
1190                         Post\DeliveryData::insert($item['uri-id'], $delivery_data);
1191                 }
1192
1193                 // Store tags from the body if this hadn't been handled previously in the protocol classes
1194                 if (!Tag::existsForPost($item['uri-id'])) {
1195                         Tag::storeFromBody($item['uri-id'], $item['body']);
1196                 }
1197
1198                 $condition = ['uri-id' => $item['uri-id'], 'uid' => $item['uid']];
1199                 if (Post::exists($condition)) {
1200                         Logger::notice('Item is already inserted - aborting', $condition);
1201                         return 0;
1202                 }
1203
1204                 $post_user_id = Post\User::insert($item['uri-id'], $item['uid'], $item);
1205                 if (!$post_user_id) {
1206                         Logger::notice('Post-User is already inserted - aborting', ['uid' => $item['uid'], 'uri-id' => $item['uri-id']]);
1207                         return 0;
1208                 }
1209
1210                 if ($item['gravity'] == GRAVITY_PARENT) {
1211                         $item['post-user-id'] = $post_user_id;
1212                         Post\ThreadUser::insert($item['uri-id'], $item['uid'], $item);
1213                 }
1214
1215                 Logger::notice('created item', ['post-id' => $post_user_id, 'uid' => $item['uid'], 'network' => $item['network'], 'uri-id' => $item['uri-id'], 'guid' => $item['guid']]);
1216
1217                 $posted_item = Post::selectFirst(self::ITEM_FIELDLIST, ['post-user-id' => $post_user_id]);
1218                 if (!DBA::isResult($posted_item)) {
1219                         // On failure store the data into a spool file so that the "SpoolPost" worker can try again later.
1220                         Logger::warning('Could not store item. it will be spooled', ['id' => $post_user_id]);
1221                         self::spool($orig_item);
1222                         return 0;
1223                 }
1224
1225                 // update the commented timestamp on the parent
1226                 if (DI::config()->get('system', 'like_no_comment')) {
1227                         // Update when it is a comment
1228                         $update_commented = in_array($posted_item['gravity'], [GRAVITY_PARENT, GRAVITY_COMMENT]);
1229                 } else {
1230                         // Update when it isn't a follow or tag verb
1231                         $update_commented = !in_array($posted_item['verb'], [Activity::FOLLOW, Activity::TAG]);
1232                 }
1233
1234                 if ($update_commented) {
1235                         $fields = ['commented' => DateTimeFormat::utcNow(), 'changed' => DateTimeFormat::utcNow()];
1236                 } else {
1237                         $fields = ['changed' => DateTimeFormat::utcNow()];
1238                 }
1239
1240                 Post::update($fields, ['uri-id' => $posted_item['parent-uri-id'], 'uid' => $posted_item['uid']]);
1241
1242                 // In that function we check if this is a forum post. Additionally we delete the item under certain circumstances
1243                 if (self::tagDeliver($posted_item['uid'], $post_user_id)) {
1244                         // Get the user information for the logging
1245                         $user = User::getById($uid);
1246
1247                         Logger::notice('Item had been deleted', ['id' => $post_user_id, 'user' => $uid, 'account-type' => $user['account-type']]);
1248                         return 0;
1249                 }
1250
1251                 if ($notify) {
1252                         if (!\Friendica\Content\Feature::isEnabled($posted_item['uid'], 'explicit_mentions') && ($posted_item['gravity'] == GRAVITY_COMMENT)) {
1253                                 Tag::createImplicitMentions($posted_item['uri-id'], $posted_item['thr-parent-id']);
1254                         }
1255                         Hook::callAll('post_local_end', $posted_item);
1256                 } else {
1257                         Hook::callAll('post_remote_end', $posted_item);
1258                 }
1259
1260                 if ($posted_item['gravity'] === GRAVITY_PARENT) {
1261                         self::addShadow($post_user_id);
1262                 } else {
1263                         self::addShadowPost($post_user_id);
1264                 }
1265
1266                 self::updateContact($posted_item);
1267
1268                 Post\UserNotification::setNotification($posted_item['uri-id'], $posted_item['uid']);
1269
1270                 // Distribute items to users who subscribed to their tags
1271                 self::distributeByTags($posted_item);
1272
1273                 // Automatically reshare the item if the "remote_self" option is selected
1274                 self::autoReshare($posted_item);
1275
1276                 $transmit = $notify || ($posted_item['visible'] && ($parent_origin || $posted_item['origin']));
1277
1278                 if ($transmit) {
1279                         // Don't relay participation messages
1280                         if (($posted_item['verb'] == Activity::FOLLOW) &&
1281                                 (!$posted_item['origin'] || ($posted_item['author-id'] != Contact::getPublicIdByUserId($uid)))) {
1282                                 Logger::info('Participation messages will not be relayed', ['item' => $posted_item['id'], 'uri' => $posted_item['uri'], 'verb' => $posted_item['verb']]);
1283                                 $transmit = false;
1284                         }
1285                 }
1286
1287                 if ($transmit) {
1288                         if (!empty($source)) {
1289                                 Post\Activity::insert($item['uri-id'], $source);
1290                         }
1291                         Worker::add(['priority' => $priority, 'dont_fork' => true], 'Notifier', $notify_type, (int)$posted_item['uri-id'], (int)$posted_item['uid']);
1292                 }
1293
1294                 // Fill the cache with the rendered content.
1295                 if (in_array($posted_item['gravity'], [GRAVITY_PARENT, GRAVITY_COMMENT]) && ($posted_item['uid'] == 0)) {
1296                         self::updateDisplayCache($posted_item['uri-id']);
1297                 }
1298
1299                 return $post_user_id;
1300         }
1301
1302         /**
1303          * Fetch the post reason for a given item array
1304          *
1305          * @param array $item
1306          *
1307          * @return integer
1308          */
1309         public static function getPostReason(array $item): int
1310         {
1311                 $actor = ($item['gravity'] == GRAVITY_PARENT) ? $item['owner-id'] : $item['author-id'];
1312                 if (empty($item['origin']) && ($item['uid'] != 0) && Contact::isSharing($actor, $item['uid'])) {
1313                         return self::PR_FOLLOWER;
1314                 }
1315
1316                 if (!empty($item['origin']) && empty($item['post-reason'])) {
1317                         return self::PR_LOCAL;
1318                 }
1319
1320                 return $item['post-reason'] ?? self::PR_NONE;
1321         }
1322
1323         /**
1324          * Update the display cache
1325          *
1326          * @param integer $uri_id
1327          * @return void
1328          */
1329         public static function updateDisplayCache(int $uri_id)
1330         {
1331                 $item = Post::selectFirst(self::DISPLAY_FIELDLIST, ['uri-id' => $uri_id]);
1332                 self::prepareBody($item, false, false, true);
1333         }
1334
1335         /**
1336          * Change the owner of a parent item if it had been shared by a forum
1337          *
1338          * (public) forum posts in the new format consist of the regular post by the author
1339          * followed by an announce message sent from the forum account.
1340          * Changing the owner helps in grouping forum posts.
1341          *
1342          * @param array $item
1343          * @return void
1344          */
1345         private static function setOwnerforResharedItem(array $item)
1346         {
1347                 $parent = Post::selectFirst(['id', 'causer-id', 'owner-id', 'author-id', 'author-link', 'origin', 'post-reason'],
1348                         ['uri-id' => $item['thr-parent-id'], 'uid' => $item['uid']]);
1349                 if (!DBA::isResult($parent)) {
1350                         Logger::error('Parent not found', ['uri-id' => $item['thr-parent-id'], 'uid' => $item['uid']]);
1351                         return;
1352                 }
1353
1354                 $author = Contact::selectFirst(['url', 'contact-type', 'network'], ['id' => $item['author-id']]);
1355                 if (!DBA::isResult($author)) {
1356                         Logger::error('Author not found', ['id' => $item['author-id']]);
1357                         return;
1358                 }
1359
1360                 $self_contact = Contact::selectFirst(['id'], ['uid' => $item['uid'], 'self' => true]);
1361                 $self = !empty($self_contact) ? $self_contact['id'] : 0;
1362
1363                 $cid = Contact::getIdForURL($author['url'], $item['uid']);
1364                 if (empty($cid) || (!Contact::isSharing($cid, $item['uid']) && ($cid != $self))) {
1365                         Logger::info('The resharer is not a following contact: quit', ['resharer' => $author['url'], 'uid' => $item['uid'], 'cid' => $cid]);
1366                         return;
1367                 }
1368
1369                 if ($author['contact-type'] != Contact::TYPE_COMMUNITY) {
1370                         if ($parent['post-reason'] == self::PR_ANNOUNCEMENT) {
1371                                 Logger::info('The parent is already marked as announced: quit', ['causer' => $parent['causer-id'], 'owner' => $parent['owner-id'], 'author' => $parent['author-id'], 'uid' => $item['uid']]);
1372                                 return;
1373                         }
1374
1375                         if (Contact::isSharing($parent['owner-id'], $item['uid'])) {
1376                                 Logger::info('The resharer is no forum: quit', ['resharer' => $item['author-id'], 'owner' => $parent['owner-id'], 'author' => $parent['author-id'], 'uid' => $item['uid']]);
1377                                 return;
1378                         }
1379                 }
1380
1381                 self::update(['post-reason' => self::PR_ANNOUNCEMENT, 'causer-id' => $item['author-id']], ['id' => $parent['id']]);
1382                 Logger::info('Set announcement post-reason', ['uri-id' => $item['uri-id'], 'thr-parent-id' => $item['thr-parent-id'], 'uid' => $item['uid']]);
1383         }
1384
1385         /**
1386          * Distribute the given item to users who subscribed to their tags
1387          *
1388          * @param array $item     Processed item
1389          */
1390         private static function distributeByTags(array $item)
1391         {
1392                 if (($item['uid'] != 0) || ($item['gravity'] != GRAVITY_PARENT) || !in_array($item['network'], Protocol::FEDERATED)) {
1393                         return;
1394                 }
1395
1396                 $uids = Tag::getUIDListByURIId($item['uri-id']);
1397                 foreach ($uids as $uid) {
1398                         $stored = self::storeForUserByUriId($item['uri-id'], $uid, ['post-reason' => self::PR_TAG]);
1399                         Logger::info('Stored item for users', ['uri-id' => $item['uri-id'], 'uid' => $uid, 'stored' => $stored]);
1400                 }
1401         }
1402
1403         /**
1404          * Distributes public items to the receivers
1405          *
1406          * @param integer $itemid      Item ID that should be added
1407          * @param string  $signed_text Original text (for Diaspora signatures), JSON encoded.
1408          * @throws \Exception
1409          */
1410         public static function distribute(int $itemid, string $signed_text = '')
1411         {
1412                 $condition = ["`id` IN (SELECT `parent` FROM `post-user-view` WHERE `id` = ?)", $itemid];
1413                 $parent = Post::selectFirst(['owner-id'], $condition);
1414                 if (!DBA::isResult($parent)) {
1415                         Logger::warning('Item not found', ['condition' => $condition]);
1416                         return;
1417                 }
1418
1419                 // Only distribute public items from native networks
1420                 $condition = ['id' => $itemid, 'uid' => 0,
1421                         'network' => array_merge(Protocol::FEDERATED ,['']),
1422                         'visible' => true, 'deleted' => false, 'private' => [self::PUBLIC, self::UNLISTED]];
1423                 $item = Post::selectFirst(array_merge(self::ITEM_FIELDLIST, ['protocol']), $condition);
1424                 if (!DBA::isResult($item)) {
1425                         Logger::warning('Item not found', ['condition' => $condition]);
1426                         return;
1427                 }
1428
1429                 $origin = $item['origin'];
1430
1431                 $users = [];
1432
1433                 /// @todo add a field "pcid" in the contact table that referrs to the public contact id.
1434                 $owner = DBA::selectFirst('contact', ['url', 'nurl', 'alias'], ['id' => $parent['owner-id']]);
1435                 if (!DBA::isResult($owner)) {
1436                         return;
1437                 }
1438
1439                 $condition = ['nurl' => $owner['nurl'], 'rel' => [Contact::SHARING, Contact::FRIEND]];
1440                 $contacts = DBA::select('contact', ['uid'], $condition);
1441                 while ($contact = DBA::fetch($contacts)) {
1442                         if ($contact['uid'] == 0) {
1443                                 continue;
1444                         }
1445
1446                         $users[$contact['uid']] = $contact['uid'];
1447                 }
1448                 DBA::close($contacts);
1449
1450                 $condition = ['alias' => $owner['url'], 'rel' => [Contact::SHARING, Contact::FRIEND]];
1451                 $contacts = DBA::select('contact', ['uid'], $condition);
1452                 while ($contact = DBA::fetch($contacts)) {
1453                         if ($contact['uid'] == 0) {
1454                                 continue;
1455                         }
1456
1457                         $users[$contact['uid']] = $contact['uid'];
1458                 }
1459                 DBA::close($contacts);
1460
1461                 if (!empty($owner['alias'])) {
1462                         $condition = ['nurl' => Strings::normaliseLink($owner['alias']), 'rel' => [Contact::SHARING, Contact::FRIEND]];
1463                         $contacts = DBA::select('contact', ['uid'], $condition);
1464                         while ($contact = DBA::fetch($contacts)) {
1465                                 if ($contact['uid'] == 0) {
1466                                         continue;
1467                                 }
1468
1469                                 $users[$contact['uid']] = $contact['uid'];
1470                         }
1471                         DBA::close($contacts);
1472                 }
1473
1474                 $origin_uid = 0;
1475
1476                 if ($item['uri-id'] != $item['parent-uri-id']) {
1477                         $parents = Post::select(['uid', 'origin'], ["`uri-id` = ? AND `uid` != 0", $item['parent-uri-id']]);
1478                         while ($parent = Post::fetch($parents)) {
1479                                 $users[$parent['uid']] = $parent['uid'];
1480                                 if ($parent['origin'] && !$origin) {
1481                                         $origin_uid = $parent['uid'];
1482                                 }
1483                         }
1484                         DBA::close($parents);
1485                 }
1486
1487                 foreach ($users as $uid) {
1488                         if ($origin_uid == $uid) {
1489                                 $item['diaspora_signed_text'] = $signed_text;
1490                         }
1491                         $item['post-reason'] = self::PR_DISTRIBUTE;
1492                         self::storeForUser($item, $uid);
1493                 }
1494         }
1495
1496         /**
1497          * Store a public item defined by their URI-ID for the given users
1498          *
1499          * @param integer $uri_id     URI-ID of the given item
1500          * @param integer $uid        The user that will receive the item entry
1501          * @param array   $fields     Additional fields to be stored
1502          * @param integer $source_uid User id of the source post
1503          * @return integer stored item id
1504          */
1505         public static function storeForUserByUriId(int $uri_id, int $uid, array $fields = [], int $source_uid = 0): int
1506         {
1507                 if ($uid == $source_uid) {
1508                         Logger::warning('target UID must not be be equal to the source UID', ['uri-id' => $uri_id, 'uid' => $uid]);
1509                         return 0;
1510                 }
1511
1512                 $item = Post::selectFirst(array_merge(self::ITEM_FIELDLIST, ['protocol']), ['uri-id' => $uri_id, 'uid' => $source_uid]);
1513                 if (!DBA::isResult($item)) {
1514                         Logger::warning('Item could not be fetched', ['uri-id' => $uri_id, 'uid' => $source_uid]);
1515                         return 0;
1516                 }
1517
1518                 if (($uid != 0) && ($item['gravity'] == GRAVITY_PARENT)) {
1519                         $owner = User::getOwnerDataById($uid);
1520                         if (($owner['contact-type'] == User::ACCOUNT_TYPE_COMMUNITY) && !Tag::isMentioned($uri_id, $owner['url'])) {
1521                                 Logger::info('Target user is a forum but is not mentioned here, thread will not be stored', ['uid' => $uid, 'uri-id' => $uri_id]);
1522                                 return 0;
1523                         }
1524                 }
1525
1526                 if (($source_uid == 0) && (($item['private'] == self::PRIVATE) || !in_array($item['network'], Protocol::FEDERATED))) {
1527                         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']]);
1528                         return 0;
1529                 }
1530
1531                 $item['post-reason'] = self::PR_STORED;
1532
1533                 $item = array_merge($item, $fields);
1534
1535                 $item['post-reason'] = self::getPostReason($item);
1536
1537                 $is_reshare = ($item['gravity'] == GRAVITY_ACTIVITY) && ($item['verb'] == Activity::ANNOUNCE);
1538
1539                 if (($uid != 0) && (($item['gravity'] == GRAVITY_PARENT) || $is_reshare) &&
1540                         DI::pConfig()->get($uid, 'system', 'accept_only_sharer') == self::COMPLETION_NONE &&
1541                         !in_array($item['post-reason'], [self::PR_FOLLOWER, self::PR_TAG, self::PR_TO, self::PR_CC])) {
1542                         Logger::info('Contact is not a follower, thread will not be stored', ['author' => $item['author-link'], 'uid' => $uid, 'uri-id' => $uri_id]);
1543                         return 0;
1544                 }
1545
1546                 $causer = $item['causer-id'] ?: $item['author-id'];
1547
1548                 if (($uri_id != $item['parent-uri-id']) && ($item['gravity'] == GRAVITY_COMMENT) && !Post::exists(['uri-id' => $item['parent-uri-id'], 'uid' => $uid])) {
1549                         if (!self::fetchParent($item['parent-uri-id'], $uid, $causer)) {
1550                                 Logger::info('Parent post had not been added', ['uri-id' => $item['parent-uri-id'], 'uid' => $uid, 'causer' => $causer]);
1551                                 return 0;
1552                         }
1553                         Logger::info('Fetched parent post', ['uri-id' => $item['parent-uri-id'], 'uid' => $uid, 'causer' => $causer]);
1554                 } elseif (($uri_id != $item['thr-parent-id']) && $is_reshare && !Post::exists(['uri-id' => $item['thr-parent-id'], 'uid' => $uid])) {
1555                         if (!self::fetchParent($item['thr-parent-id'], $uid, $causer)) {
1556                                 Logger::info('Thread parent had not been added', ['uri-id' => $item['thr-parent-id'], 'uid' => $uid, 'causer' => $causer]);
1557                                 return 0;
1558                         }
1559                         Logger::info('Fetched thread parent', ['uri-id' => $item['thr-parent-id'], 'uid' => $uid, 'causer' => $causer]);
1560                 }
1561
1562                 $stored = self::storeForUser($item, $uid);
1563                 Logger::info('Item stored for user', ['uri-id' => $item['uri-id'], 'uid' => $uid, 'causer' => $causer, 'source-uid' => $source_uid, 'stored' => $stored]);
1564                 return $stored;
1565         }
1566
1567         /**
1568          * Fetch the parent with the given uri-id
1569          *
1570          * @param integer $uri_id
1571          * @param integer $uid
1572          * @param integer $causer
1573          *
1574          * @return integer
1575          */
1576         private static function fetchParent(int $uri_id, int $uid, int $causer): int
1577         {
1578                 // Fetch the origin user for the post
1579                 $origin_uid = self::GetOriginUidForUriId($uri_id, $uid);
1580                 if (is_null($origin_uid)) {
1581                         Logger::info('Origin item was not found', ['uid' => $uid, 'uri-id' => $uri_id]);
1582                         return 0;
1583                 }
1584
1585                 return self::storeForUserByUriId($uri_id, $uid, ['causer-id' => $causer, 'post-reason' => self::PR_FETCHED], $origin_uid);
1586         }
1587
1588         /**
1589          * Returns the origin uid of a post if the given user is allowed to see it.
1590          *
1591          * @param int $uriid
1592          * @param int $uid
1593          * @return int
1594          */
1595         private static function GetOriginUidForUriId(int $uriid, int $uid)
1596         {
1597                 if (Post::exists(['uri-id' => $uriid, 'uid' => $uid])) {
1598                         return $uid;
1599                 }
1600
1601                 $post = Post::selectFirst(['uid', 'allow_cid', 'allow_gid', 'deny_cid', 'deny_gid', 'private'], ['uri-id' => $uriid, 'origin' => true]);
1602                 if (!empty($post)) {
1603                         if (in_array($post['private'], [Item::PUBLIC, Item::UNLISTED])) {
1604                                 return $post['uid'];
1605                         }
1606
1607                         $pcid = Contact::getPublicIdByUserId($uid);
1608                         if (empty($pcid)) {
1609                                 return null;
1610                         }
1611
1612                         foreach (Item::enumeratePermissions($post, true) as $receiver) {
1613                                 if ($receiver == $pcid) {
1614                                         return $post['uid'];
1615                                 }
1616                         }
1617
1618                         return null;
1619                 }
1620
1621                 if (Post::exists(['uri-id' => $uriid, 'uid' => 0])) {
1622                         return 0;
1623                 }
1624
1625                 // When the post belongs to a a forum then all forum users are allowed to access it
1626                 foreach (Tag::getByURIId($uriid, [Tag::MENTION, Tag::EXCLUSIVE_MENTION]) as $tag) {
1627                         if (DBA::exists('contact', ['uid' => $uid, 'nurl' => Strings::normaliseLink($tag['url']), 'contact-type' => Contact::TYPE_COMMUNITY])) {
1628                                 $target_uid = User::getIdForURL($tag['url']);
1629                                 if (!empty($target_uid)) {
1630                                         return $target_uid;
1631                                 }
1632                         }
1633                 }
1634
1635                 return null;
1636         }
1637
1638         /**
1639          * Store a public item array for the given users
1640          *
1641          * @param array   $item   The item entry that will be stored
1642          * @param integer $uid    The user that will receive the item entry
1643          * @return integer stored item id
1644          * @throws \Exception
1645          */
1646         private static function storeForUser(array $item, int $uid): int
1647         {
1648                 $post = Post::selectFirst(['id'], ['uri-id' => $item['uri-id'], 'uid' => $uid]);
1649                 if (!empty($post['id'])) {
1650                         if (!empty($item['event-id'])) {
1651                                 $event_post = Post::selectFirst(['event-id'], ['uri-id' => $item['uri-id'], 'uid' => $uid]);
1652                                 if (!empty($event_post['event-id'])) {
1653                                         $event = DBA::selectFirst('event', ['edited', 'start', 'finish', 'summary', 'desc', 'location', 'nofinish', 'adjust'], ['id' => $item['event-id']]);
1654                                         if (!empty($event)) {
1655                                                 // We aren't using "Event::store" here, since we don't want to trigger any further action
1656                                                 $ret = DBA::update('event', $event, ['id' => $event_post['event-id']]);
1657                                                 Logger::info('Event updated', ['uid' => $uid, 'source-event' => $item['event-id'], 'target-event' => $event_post['event-id'], 'ret' => $ret]);
1658                                         }
1659                                 }
1660                         }
1661                         Logger::info('Item already exists', ['uri-id' => $item['uri-id'], 'uid' => $uid, 'id' => $post['id']]);
1662                         return $post['id'];
1663                 }
1664
1665                 // Data from the "post-user" table
1666                 unset($item['id']);
1667                 unset($item['mention']);
1668                 unset($item['starred']);
1669                 unset($item['unseen']);
1670                 unset($item['psid']);
1671                 unset($item['pinned']);
1672                 unset($item['ignored']);
1673                 unset($item['pubmail']);
1674                 unset($item['event-id']);
1675                 unset($item['hidden']);
1676                 unset($item['notification-type']);
1677
1678                 // Data from the "post-delivery-data" table
1679                 unset($item['postopts']);
1680                 unset($item['inform']);
1681
1682                 $item['uid'] = $uid;
1683                 $item['origin'] = 0;
1684                 $item['wall'] = 0;
1685
1686                 $item['contact-id'] = self::contactId($item);
1687
1688                 $notify = false;
1689                 if ($item['gravity'] == GRAVITY_PARENT) {
1690                         $contact = DBA::selectFirst('contact', [], ['id' => $item['contact-id'], 'self' => false]);
1691                         if (DBA::isResult($contact)) {
1692                                 $notify = self::isRemoteSelf($contact, $item);
1693                         }
1694                 }
1695
1696                 $distributed = self::insert($item, $notify);
1697
1698                 if (!$distributed) {
1699                         Logger::info("Distributed item wasn't stored", ['uri-id' => $item['uri-id'], 'user' => $uid]);
1700                 } else {
1701                         Logger::info('Distributed item was stored', ['uri-id' => $item['uri-id'], 'user' => $uid, 'stored' => $distributed]);
1702                 }
1703                 return $distributed;
1704         }
1705
1706         /**
1707          * Add a shadow entry for a given item id that is a thread starter
1708          *
1709          * We store every public item entry additionally with the user id "0".
1710          * This is used for the community page and for the search.
1711          * It is planned that in the future we will store public item entries only once.
1712          *
1713          * @param integer $itemid Item ID that should be added
1714          * @throws \Exception
1715          */
1716         private static function addShadow(int $itemid)
1717         {
1718                 $fields = ['uid', 'private', 'visible', 'deleted', 'network', 'uri-id'];
1719                 $condition = ['id' => $itemid, 'gravity' => GRAVITY_PARENT];
1720                 $item = Post::selectFirst($fields, $condition);
1721
1722                 if (!DBA::isResult($item)) {
1723                         return;
1724                 }
1725
1726                 // is it already a copy?
1727                 if (($itemid == 0) || ($item['uid'] == 0)) {
1728                         return;
1729                 }
1730
1731                 // Is it a visible public post?
1732                 if (!$item["visible"] || $item["deleted"]  || ($item["private"] == self::PRIVATE)) {
1733                         return;
1734                 }
1735
1736                 // is it an entry from a connector? Only add an entry for natively connected networks
1737                 if (!in_array($item["network"], array_merge(Protocol::FEDERATED ,['']))) {
1738                         return;
1739                 }
1740
1741                 if (Post::exists(['uri-id' => $item['uri-id'], 'uid' => 0])) {
1742                         return;
1743                 }
1744
1745                 $item = Post::selectFirst(array_merge(self::ITEM_FIELDLIST, ['protocol']), ['id' => $itemid]);
1746
1747                 if (DBA::isResult($item)) {
1748                         // Preparing public shadow (removing user specific data)
1749                         $item['uid'] = 0;
1750                         unset($item['id']);
1751                         unset($item['parent']);
1752                         unset($item['wall']);
1753                         unset($item['mention']);
1754                         unset($item['origin']);
1755                         unset($item['starred']);
1756                         unset($item['postopts']);
1757                         unset($item['inform']);
1758                         unset($item['post-reason']);
1759                         if ($item['uri-id'] == $item['parent-uri-id']) {
1760                                 $item['contact-id'] = $item['owner-id'];
1761                         } else {
1762                                 $item['contact-id'] = $item['author-id'];
1763                         }
1764
1765                         $public_shadow = self::insert($item);
1766
1767                         Logger::info('Stored public shadow', ['thread' => $itemid, 'id' => $public_shadow]);
1768                 }
1769         }
1770
1771         /**
1772          * Add a shadow entry for a given item id that is a comment
1773          *
1774          * This function does the same like the function above - but for comments
1775          *
1776          * @param integer $itemid Item ID that should be added
1777          * @throws \Exception
1778          */
1779         private static function addShadowPost(int $itemid)
1780         {
1781                 $item = Post::selectFirst(array_merge(self::ITEM_FIELDLIST, ['protocol']), ['id' => $itemid]);
1782                 if (!DBA::isResult($item)) {
1783                         return;
1784                 }
1785
1786                 // Is it a toplevel post?
1787                 if ($item['gravity'] == GRAVITY_PARENT) {
1788                         self::addShadow($itemid);
1789                         return;
1790                 }
1791
1792                 // Is this a shadow entry?
1793                 if ($item['uid'] == 0) {
1794                         return;
1795                 }
1796
1797                 // Is there a shadow parent?
1798                 if (!Post::exists(['uri-id' => $item['parent-uri-id'], 'uid' => 0])) {
1799                         return;
1800                 }
1801
1802                 // Is there already a shadow entry?
1803                 if (Post::exists(['uri-id' => $item['uri-id'], 'uid' => 0])) {
1804                         return;
1805                 }
1806
1807                 // Save "origin" and "parent" state
1808                 $origin = $item['origin'];
1809                 $parent = $item['parent'];
1810
1811                 // Preparing public shadow (removing user specific data)
1812                 $item['uid'] = 0;
1813                 unset($item['id']);
1814                 unset($item['parent']);
1815                 unset($item['wall']);
1816                 unset($item['mention']);
1817                 unset($item['origin']);
1818                 unset($item['starred']);
1819                 unset($item['postopts']);
1820                 unset($item['inform']);
1821                 unset($item['post-reason']);
1822                 $item['contact-id'] = Contact::getIdForURL($item['author-link']);
1823
1824                 $public_shadow = self::insert($item);
1825
1826                 Logger::info('Stored public shadow', ['uri-id' => $item['uri-id'], 'id' => $public_shadow]);
1827
1828                 // If this was a comment to a Diaspora post we don't get our comment back.
1829                 // This means that we have to distribute the comment by ourselves.
1830                 if ($origin && Post::exists(['id' => $parent, 'network' => Protocol::DIASPORA])) {
1831                         self::distribute($public_shadow);
1832                 }
1833         }
1834
1835         /**
1836          * Adds a language specification in a "language" element of given $arr.
1837          * Expects "body" element to exist in $arr.
1838          *
1839          * @param array $item
1840          * @return string detected language
1841          * @throws \Text_LanguageDetect_Exception
1842          */
1843         private static function getLanguage(array $item): string
1844         {
1845                 if (!empty($item['language'])) {
1846                         return $item['language'];
1847                 }
1848
1849                 if (!in_array($item['gravity'], [GRAVITY_PARENT, GRAVITY_COMMENT]) || empty($item['body'])) {
1850                         return '';
1851                 }
1852
1853                 // Convert attachments to links
1854                 $naked_body = BBCode::removeAttachment($item['body']);
1855                 if (empty($naked_body)) {
1856                         return '';
1857                 }
1858
1859                 // Remove links and pictures
1860                 $naked_body = BBCode::removeLinks($naked_body);
1861
1862                 // Convert the title and the body to plain text
1863                 $naked_body = trim($item['title'] . "\n" . BBCode::toPlaintext($naked_body));
1864
1865                 // Remove possibly remaining links
1866                 $naked_body = preg_replace(Strings::autoLinkRegEx(), '', $naked_body);
1867
1868                 if (empty($naked_body)) {
1869                         return '';
1870                 }
1871
1872                 $availableLanguages = DI::l10n()->getAvailableLanguages();
1873                 // See https://github.com/friendica/friendica/issues/10511
1874                 // Persian is manually added to language detection until a persian translation is provided for the interface, at
1875                 // which point it will be automatically available through `getAvailableLanguages()` and this should be removed.
1876                 $availableLanguages['fa'] = 'fa';
1877
1878                 $ld = new Language(array_keys($availableLanguages));
1879                 $languages = $ld->detect($naked_body)->limit(0, 3)->close();
1880                 if (is_array($languages)) {
1881                         return json_encode($languages);
1882                 }
1883
1884                 return '';
1885         }
1886
1887         public static function getLanguageMessage(array $item): string
1888         {
1889                 $iso639 = new \Matriphe\ISO639\ISO639;
1890
1891                 $used_languages = '';
1892                 foreach (json_decode($item['language'], true) as $language => $reliability) {
1893                         $used_languages .= $iso639->languageByCode1($language) . ' (' . $language . "): " . number_format($reliability, 5) . '\n';
1894                 }
1895                 $used_languages = DI::l10n()->t('Detected languages in this post:\n%s', $used_languages);
1896                 return $used_languages;
1897         }
1898
1899         /**
1900          * Creates an unique guid out of a given uri.
1901          * This function is used for messages outside the fediverse (Connector posts, feeds, Mails, ...)
1902          * Posts that are created on this system are using System::createUUID.
1903          * Received ActivityPub posts are using Processor::getGUIDByURL.
1904          *
1905          * @param string      $uri uri of an item entry
1906          * @param string|null $host hostname for the GUID prefix
1907          * @return string Unique guid
1908          */
1909         public static function guidFromUri(string $uri, string $host = null): string
1910         {
1911                 // Our regular guid routine is using this kind of prefix as well
1912                 // We have to avoid that different routines could accidentally create the same value
1913                 $parsed = parse_url($uri);
1914
1915                 // Remove the scheme to make sure that "https" and "http" doesn't make a difference
1916                 unset($parsed['scheme']);
1917
1918                 // Glue it together to be able to make a hash from it
1919                 $host_id = implode('/', $parsed);
1920
1921                 // Use a mixture of several hashes to provide some GUID like experience
1922                 return hash('crc32', $host) . '-'. hash('joaat', $host_id) . '-'. hash('fnv164', $host_id);
1923         }
1924
1925         /**
1926          * generate an unique URI
1927          *
1928          * @param string $guid An existing GUID (Otherwise it will be generated)
1929          *
1930          * @return string
1931          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1932          */
1933         public static function newURI(string $guid = ''): string
1934         {
1935                 if ($guid == '') {
1936                         $guid = System::createUUID();
1937                 }
1938
1939                 return DI::baseUrl()->get() . '/objects/' . $guid;
1940         }
1941
1942         /**
1943          * Set "success_update" and "last-item" to the date of the last time we heard from this contact
1944          *
1945          * This can be used to filter for inactive contacts.
1946          * Only do this for public postings to avoid privacy problems, since poco data is public.
1947          * Don't set this value if it isn't from the owner (could be an author that we don't know)
1948          *
1949          * @param array $arr Contains the just posted item record
1950          * @throws \Exception
1951          */
1952         private static function updateContact(array $arr)
1953         {
1954                 // Unarchive the author
1955                 $contact = DBA::selectFirst('contact', [], ['id' => $arr["author-id"]]);
1956                 if (DBA::isResult($contact)) {
1957                         Contact::unmarkForArchival($contact);
1958                 }
1959
1960                 // Unarchive the contact if it's not our own contact
1961                 $contact = DBA::selectFirst('contact', [], ['id' => $arr["contact-id"], 'self' => false]);
1962                 if (DBA::isResult($contact)) {
1963                         Contact::unmarkForArchival($contact);
1964                 }
1965
1966                 /// @todo On private posts we could obfuscate the date
1967                 $update = ($arr['private'] != self::PRIVATE) || in_array($arr['network'], Protocol::FEDERATED);
1968
1969                 // Is it a forum? Then we don't care about the rules from above
1970                 if (!$update && in_array($arr["network"], [Protocol::ACTIVITYPUB, Protocol::DFRN]) && ($arr["parent-uri-id"] === $arr["uri-id"])) {
1971                         if (DBA::exists('contact', ['id' => $arr['contact-id'], 'forum' => true])) {
1972                                 $update = true;
1973                         }
1974                 }
1975
1976                 if ($update) {
1977                         // The "self" contact id is used (for example in the connectors) when the contact is unknown
1978                         // So we have to ensure to only update the last item when it had been our own post,
1979                         // or it had been done by a "regular" contact.
1980                         if (!empty($arr['wall'])) {
1981                                 $condition = ['id' => $arr['contact-id']];
1982                         } else {
1983                                 $condition = ['id' => $arr['contact-id'], 'self' => false];
1984                         }
1985                         Contact::update(['failed' => false, 'local-data' => true, 'success_update' => $arr['received'], 'last-item' => $arr['received']], $condition);
1986                 }
1987                 // Now do the same for the system wide contacts with uid=0
1988                 if ($arr['private'] != self::PRIVATE) {
1989                         Contact::update(['failed' => false, 'local-data' => true, 'success_update' => $arr['received'], 'last-item' => $arr['received']],
1990                                 ['id' => $arr['owner-id']]);
1991
1992                         if ($arr['owner-id'] != $arr['author-id']) {
1993                                 Contact::update(['failed' => false, 'local-data' => true, 'success_update' => $arr['received'], 'last-item' => $arr['received']],
1994                                         ['id' => $arr['author-id']]);
1995                         }
1996                 }
1997         }
1998
1999         public static function setHashtags(string $body): string
2000         {
2001                 $body = BBCode::performWithEscapedTags($body, ['noparse', 'pre', 'code', 'img'], function ($body) {
2002                         $tags = BBCode::getTags($body);
2003
2004                         // No hashtags?
2005                         if (!count($tags)) {
2006                                 return $body;
2007                         }
2008
2009                         // This sorting is important when there are hashtags that are part of other hashtags
2010                         // Otherwise there could be problems with hashtags like #test and #test2
2011                         // Because of this we are sorting from the longest to the shortest tag.
2012                         usort($tags, function ($a, $b) {
2013                                 return strlen($b) <=> strlen($a);
2014                         });
2015
2016                         $URLSearchString = "^\[\]";
2017
2018                         // All hashtags should point to the home server if "local_tags" is activated
2019                         if (DI::config()->get('system', 'local_tags')) {
2020                                 $body = preg_replace("/#\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",
2021                                         "#[url=" . DI::baseUrl() . "/search?tag=$2]$2[/url]", $body);
2022                         }
2023
2024                         // mask hashtags inside of url, bookmarks and attachments to avoid urls in urls
2025                         $body = preg_replace_callback("/\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",
2026                                 function ($match) {
2027                                         return ("[url=" . str_replace("#", "&num;", $match[1]) . "]" . str_replace("#", "&num;", $match[2]) . "[/url]");
2028                                 }, $body);
2029
2030                         $body = preg_replace_callback("/\[bookmark\=([$URLSearchString]*)\](.*?)\[\/bookmark\]/ism",
2031                                 function ($match) {
2032                                         return ("[bookmark=" . str_replace("#", "&num;", $match[1]) . "]" . str_replace("#", "&num;", $match[2]) . "[/bookmark]");
2033                                 }, $body);
2034
2035                         $body = preg_replace_callback("/\[attachment (.*?)\](.*?)\[\/attachment\]/ism",
2036                                 function ($match) {
2037                                         return ("[attachment " . str_replace("#", "&num;", $match[1]) . "]" . $match[2] . "[/attachment]");
2038                                 }, $body);
2039
2040                         // Repair recursive urls
2041                         $body = preg_replace("/&num;\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",
2042                                 "&num;$2", $body);
2043
2044                         foreach ($tags as $tag) {
2045                                 if ((strpos($tag, '#') !== 0) || strpos($tag, '[url=') || strlen($tag) < 2 || $tag[1] == '#') {
2046                                         continue;
2047                                 }
2048
2049                                 $basetag = str_replace('_', ' ', substr($tag, 1));
2050                                 $newtag = '#[url=' . DI::baseUrl() . '/search?tag=' . $basetag . ']' . $basetag . '[/url]';
2051
2052                                 $body = str_replace($tag, $newtag, $body);
2053                         }
2054
2055                         // Convert back the masked hashtags
2056                         $body = str_replace("&num;", "#", $body);
2057
2058                         return $body;
2059                 });
2060
2061                 return $body;
2062         }
2063
2064         /**
2065          * look for mention tags and setup a second delivery chain for forum/community posts if appropriate
2066          *
2067          * @param int $uid
2068          * @param int $item_id
2069          * @return boolean true if item was deleted, else false
2070          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
2071          * @throws \ImagickException
2072          */
2073         private static function tagDeliver(int $uid, int $item_id): bool
2074         {
2075                 $mention = false;
2076
2077                 $owner = User::getOwnerDataById($uid);
2078                 if (!DBA::isResult($owner)) {
2079                         Logger::warning('User not found, quitting here.', ['uid' => $uid]);
2080                         return false;
2081                 }
2082
2083                 if ($owner['contact-type'] != User::ACCOUNT_TYPE_COMMUNITY) {
2084                         Logger::debug('Owner is no community, quitting here.', ['uid' => $uid, 'id' => $item_id]);
2085                         return false;
2086                 }
2087
2088                 $item = Post::selectFirst(self::ITEM_FIELDLIST, ['id' => $item_id, 'gravity' => [GRAVITY_PARENT, GRAVITY_COMMENT], 'origin' => false]);
2089                 if (!DBA::isResult($item)) {
2090                         Logger::debug('Post is an activity or origin or not found at all, quitting here.', ['id' => $item_id]);
2091                         return false;
2092                 }
2093
2094                 if ($item['gravity'] == GRAVITY_PARENT) {
2095                         if (Tag::isMentioned($item['uri-id'], $owner['url'])) {
2096                                 Logger::info('Mention found in tag.', ['uri' => $item['uri'], 'uid' => $uid, 'id' => $item_id, 'uri-id' => $item['uri-id'], 'guid' => $item['guid']]);
2097                         } else {
2098                                 Logger::info('Top-level post without mention is deleted.', ['uri' => $item['uri'], $uid, 'id' => $item_id, 'uri-id' => $item['uri-id'], 'guid' => $item['guid']]);
2099                                 Post\User::delete(['uri-id' => $item['uri-id'], 'uid' => $item['uid']]);
2100                                 return true;
2101                         }
2102
2103                         $arr = ['item' => $item, 'user' => $owner];
2104
2105                         Hook::callAll('tagged', $arr);
2106                 } else {
2107                         if (Tag::isMentioned($item['parent-uri-id'], $owner['url'])) {
2108                                 Logger::info('Mention found in parent tag.', ['uri' => $item['uri'], 'uid' => $uid, 'id' => $item_id, 'uri-id' => $item['uri-id'], 'guid' => $item['guid']]);
2109                         } else {
2110                                 Logger::debug('No mentions found in parent, quitting here.', ['id' => $item_id, 'uri-id' => $item['uri-id'], 'guid' => $item['guid']]);
2111                                 return false;
2112                         }
2113                 }
2114
2115                 Logger::info('Community post will be distributed', ['uri' => $item['uri'], 'uid' => $uid, 'id' => $item_id, 'uri-id' => $item['uri-id'], 'guid' => $item['guid']]);
2116
2117                 if ($owner['page-flags'] == User::PAGE_FLAGS_PRVGROUP) {
2118                         $allow_cid = '';
2119                         $allow_gid = '<' . Group::FOLLOWERS . '>';
2120                         $deny_cid  = '';
2121                         $deny_gid  = '';
2122                         self::performActivity($item['id'], 'announce', $uid, $allow_cid, $allow_gid, $deny_cid, $deny_gid);
2123                 } else {
2124                         self::performActivity($item['id'], 'announce', $uid);
2125                 }
2126
2127                 Logger::info('Community post had been distributed', ['uri' => $item['uri'], 'uid' => $uid, 'id' => $item_id, 'uri-id' => $item['uri-id'], 'guid' => $item['guid']]);
2128                 return false;
2129         }
2130
2131         /**
2132          * Automatically reshare the item if the "remote_self" option is selected
2133          *
2134          * @param array $item
2135          * @return void
2136          */
2137         private static function autoReshare(array $item)
2138         {
2139                 if ($item['gravity'] != GRAVITY_PARENT) {
2140                         return;
2141                 }
2142
2143                 if (!DBA::exists('contact', ['id' => $item['contact-id'], 'remote_self' => Contact::MIRROR_NATIVE_RESHARE])) {
2144                         return;
2145                 }
2146
2147                 if (!in_array($item['network'], [Protocol::ACTIVITYPUB, Protocol::DFRN])) {
2148                         return;
2149                 }
2150
2151                 Logger::info('Automatically reshare item', ['uid' => $item['uid'], 'id' => $item['id'], 'guid' => $item['guid'], 'uri-id' => $item['uri-id']]);
2152
2153                 self::performActivity($item['id'], 'announce', $item['uid']);
2154         }
2155
2156         public static function isRemoteSelf(array $contact, array &$datarray): bool
2157         {
2158                 if (!$contact['remote_self']) {
2159                         return false;
2160                 }
2161
2162                 // Prevent the forwarding of posts that are forwarded
2163                 if (!empty($datarray["extid"]) && ($datarray["extid"] == Protocol::DFRN)) {
2164                         Logger::info('Already forwarded');
2165                         return false;
2166                 }
2167
2168                 // Prevent to forward already forwarded posts
2169                 if ($datarray["app"] == DI::baseUrl()->getHostname()) {
2170                         Logger::info('Already forwarded (second test)');
2171                         return false;
2172                 }
2173
2174                 // Only forward posts
2175                 if ($datarray["verb"] != Activity::POST) {
2176                         Logger::info('No post');
2177                         return false;
2178                 }
2179
2180                 if (($contact['network'] != Protocol::FEED) && ($datarray['private'] == self::PRIVATE)) {
2181                         Logger::info('Not public');
2182                         return false;
2183                 }
2184
2185                 $datarray2 = $datarray;
2186                 Logger::info('remote-self start', ['contact' => $contact['url'], 'remote_self'=> $contact['remote_self'], 'item' => $datarray]);
2187                 if ($contact['remote_self'] == Contact::MIRROR_OWN_POST) {
2188                         $self = DBA::selectFirst('contact', ['id', 'name', 'url', 'thumb'],
2189                                         ['uid' => $contact['uid'], 'self' => true]);
2190                         if (DBA::isResult($self)) {
2191                                 $datarray['contact-id'] = $self["id"];
2192
2193                                 $datarray['owner-name'] = $self["name"];
2194                                 $datarray['owner-link'] = $self["url"];
2195                                 $datarray['owner-avatar'] = $self["thumb"];
2196
2197                                 $datarray['author-name']   = $datarray['owner-name'];
2198                                 $datarray['author-link']   = $datarray['owner-link'];
2199                                 $datarray['author-avatar'] = $datarray['owner-avatar'];
2200
2201                                 unset($datarray['edited']);
2202
2203                                 unset($datarray['network']);
2204                                 unset($datarray['owner-id']);
2205                                 unset($datarray['author-id']);
2206                         }
2207
2208                         if ($contact['network'] != Protocol::FEED) {
2209                                 $old_uri_id = $datarray["uri-id"] ?? 0;
2210                                 $datarray["guid"] = System::createUUID();
2211                                 unset($datarray["plink"]);
2212                                 $datarray["uri"] = self::newURI($datarray["guid"]);
2213                                 $datarray["uri-id"] = ItemURI::getIdByURI($datarray["uri"]);
2214                                 $datarray["extid"] = Protocol::DFRN;
2215                                 $urlpart = parse_url($datarray2['author-link']);
2216                                 $datarray["app"] = $urlpart["host"];
2217                                 if (!empty($old_uri_id)) {
2218                                         Post\Media::copy($old_uri_id, $datarray["uri-id"]);
2219                                 }
2220
2221                                 unset($datarray["parent-uri"]);
2222                                 unset($datarray["thr-parent"]);
2223                         } else {
2224                                 $datarray['private'] = self::PUBLIC;
2225                         }
2226                 }
2227
2228                 if ($contact['network'] != Protocol::FEED) {
2229                         // Store the original post
2230                         $result = self::insert($datarray2);
2231                         Logger::info('remote-self post original item', ['contact' => $contact['url'], 'result'=> $result, 'item' => $datarray2]);
2232                 } else {
2233                         $datarray["app"] = "Feed";
2234                         $result = true;
2235                 }
2236
2237                 return (bool)$result;
2238         }
2239
2240         /**
2241          *
2242          * @param string $s
2243          * @param int    $uid
2244          * @param array  $item
2245          * @param int    $cid
2246          * @return string
2247          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
2248          * @throws \ImagickException
2249          */
2250         public static function fixPrivatePhotos(string $s, int $uid, array $item = null, int $cid = 0): string
2251         {
2252                 if (DI::config()->get('system', 'disable_embedded')) {
2253                         return $s;
2254                 }
2255
2256                 Logger::info('check for photos');
2257                 $site = substr(DI::baseUrl(), strpos(DI::baseUrl(), '://'));
2258
2259                 $orig_body = $s;
2260                 $new_body = '';
2261
2262                 $img_start = strpos($orig_body, '[img');
2263                 $img_st_close = ($img_start !== false ? strpos(substr($orig_body, $img_start), ']') : false);
2264                 $img_len = ($img_start !== false ? strpos(substr($orig_body, $img_start + $img_st_close + 1), '[/img]') : false);
2265
2266                 while (($img_st_close !== false) && ($img_len !== false)) {
2267                         $img_st_close++; // make it point to AFTER the closing bracket
2268                         $image = substr($orig_body, $img_start + $img_st_close, $img_len);
2269
2270                         Logger::info('found photo', ['image' => $image]);
2271
2272                         if (stristr($image, $site . '/photo/')) {
2273                                 // Only embed locally hosted photos
2274                                 $replace = false;
2275                                 $i = basename($image);
2276                                 $i = str_replace(['.jpg', '.png', '.gif'], ['', '', ''], $i);
2277                                 $x = strpos($i, '-');
2278
2279                                 if ($x) {
2280                                         $res = substr($i, $x + 1);
2281                                         $i = substr($i, 0, $x);
2282                                         $photo = Photo::getPhotoForUser($uid, $i, $res);
2283                                         if (DBA::isResult($photo)) {
2284                                                 /*
2285                                                  * Check to see if we should replace this photo link with an embedded image
2286                                                  * 1. No need to do so if the photo is public
2287                                                  * 2. If there's a contact-id provided, see if they're in the access list
2288                                                  *    for the photo. If so, embed it.
2289                                                  * 3. Otherwise, if we have an item, see if the item permissions match the photo
2290                                                  *    permissions, regardless of order but first check to see if they're an exact
2291                                                  *    match to save some processing overhead.
2292                                                  */
2293                                                 if (self::hasPermissions($photo)) {
2294                                                         if ($cid) {
2295                                                                 $recips = self::enumeratePermissions($photo);
2296                                                                 if (in_array($cid, $recips)) {
2297                                                                         $replace = true;
2298                                                                 }
2299                                                         } elseif ($item) {
2300                                                                 if (self::samePermissions($uid, $item, $photo)) {
2301                                                                         $replace = true;
2302                                                                 }
2303                                                         }
2304                                                 }
2305                                                 if ($replace) {
2306                                                         $photo_img = Photo::getImageForPhoto($photo);
2307                                                         // If a custom width and height were specified, apply before embedding
2308                                                         if (preg_match("/\[img\=([0-9]*)x([0-9]*)\]/is", substr($orig_body, $img_start, $img_st_close), $match)) {
2309                                                                 Logger::info('scaling photo');
2310
2311                                                                 $width = intval($match[1]);
2312                                                                 $height = intval($match[2]);
2313
2314                                                                 $photo_img->scaleDown(max($width, $height));
2315                                                         }
2316
2317                                                         $data = $photo_img->asString();
2318                                                         $type = $photo_img->getType();
2319
2320                                                         Logger::info('replacing photo');
2321                                                         $image = 'data:' . $type . ';base64,' . base64_encode($data);
2322                                                         Logger::debug('replaced', ['image' => $image]);
2323                                                 }
2324                                         }
2325                                 }
2326                         }
2327
2328                         $new_body = $new_body . substr($orig_body, 0, $img_start + $img_st_close) . $image . '[/img]';
2329                         $orig_body = substr($orig_body, $img_start + $img_st_close + $img_len + strlen('[/img]'));
2330                         if ($orig_body === false) {
2331                                 $orig_body = '';
2332                         }
2333
2334                         $img_start = strpos($orig_body, '[img');
2335                         $img_st_close = ($img_start !== false ? strpos(substr($orig_body, $img_start), ']') : false);
2336                         $img_len = ($img_start !== false ? strpos(substr($orig_body, $img_start + $img_st_close + 1), '[/img]') : false);
2337                 }
2338
2339                 $new_body = $new_body . $orig_body;
2340
2341                 return $new_body;
2342         }
2343
2344         private static function hasPermissions(array $obj)
2345         {
2346                 return !empty($obj['allow_cid']) || !empty($obj['allow_gid']) ||
2347                         !empty($obj['deny_cid']) || !empty($obj['deny_gid']);
2348         }
2349
2350         // @TODO $uid is unused parameter
2351         private static function samePermissions($uid, array $obj1, array $obj2): bool
2352         {
2353                 // first part is easy. Check that these are exactly the same.
2354                 if (($obj1['allow_cid'] == $obj2['allow_cid'])
2355                         && ($obj1['allow_gid'] == $obj2['allow_gid'])
2356                         && ($obj1['deny_cid'] == $obj2['deny_cid'])
2357                         && ($obj1['deny_gid'] == $obj2['deny_gid'])) {
2358                         return true;
2359                 }
2360
2361                 // This is harder. Parse all the permissions and compare the resulting set.
2362                 $recipients1 = self::enumeratePermissions($obj1);
2363                 $recipients2 = self::enumeratePermissions($obj2);
2364                 sort($recipients1);
2365                 sort($recipients2);
2366
2367                 /// @TODO Comparison of arrays, maybe use array_diff_assoc() here?
2368                 return ($recipients1 == $recipients2);
2369         }
2370
2371         /**
2372          * Returns an array of contact-ids that are allowed to see this object
2373          *
2374          * @param array $obj        Item array with at least uid, allow_cid, allow_gid, deny_cid and deny_gid
2375          * @param bool  $check_dead Prunes unavailable contacts from the result
2376          * @return array
2377          * @throws \Exception
2378          */
2379         public static function enumeratePermissions(array $obj, bool $check_dead = false): array
2380         {
2381                 $aclFormater = DI::aclFormatter();
2382
2383                 $allow_people = $aclFormater->expand($obj['allow_cid']);
2384                 $allow_groups = Group::expand($obj['uid'], $aclFormater->expand($obj['allow_gid']), $check_dead);
2385                 $deny_people  = $aclFormater->expand($obj['deny_cid']);
2386                 $deny_groups  = Group::expand($obj['uid'], $aclFormater->expand($obj['deny_gid']), $check_dead);
2387                 $recipients   = array_unique(array_merge($allow_people, $allow_groups));
2388                 $deny         = array_unique(array_merge($deny_people, $deny_groups));
2389                 $recipients   = array_diff($recipients, $deny);
2390                 return $recipients;
2391         }
2392
2393         public static function expire(int $uid, int $days, string $network = "", bool $force = false)
2394         {
2395                 if (!$uid || ($days < 1)) {
2396                         return;
2397                 }
2398
2399                 $condition = ["`uid` = ? AND NOT `deleted` AND `gravity` = ?",
2400                         $uid, GRAVITY_PARENT];
2401
2402                 /*
2403                  * $expire_network_only = save your own wall posts
2404                  * and just expire conversations started by others
2405                  */
2406                 $expire_network_only = DI::pConfig()->get($uid, 'expire', 'network_only', false);
2407
2408                 if ($expire_network_only) {
2409                         $condition[0] .= " AND NOT `wall`";
2410                 }
2411
2412                 if ($network != "") {
2413                         $condition[0] .= " AND `network` = ?";
2414                         $condition[] = $network;
2415                 }
2416
2417                 $condition[0] .= " AND `received` < ?";
2418                 $condition[] = DateTimeFormat::utc('now - ' . $days . ' day');
2419
2420                 $items = Post::select(['resource-id', 'starred', 'id', 'post-type', 'uid', 'uri-id'], $condition);
2421
2422                 if (!DBA::isResult($items)) {
2423                         return;
2424                 }
2425
2426                 $expire_items = DI::pConfig()->get($uid, 'expire', 'items', true);
2427
2428                 // Forcing expiring of items - but not notes and marked items
2429                 if ($force) {
2430                         $expire_items = true;
2431                 }
2432
2433                 $expire_notes = DI::pConfig()->get($uid, 'expire', 'notes', true);
2434                 $expire_starred = DI::pConfig()->get($uid, 'expire', 'starred', true);
2435                 $expire_photos = DI::pConfig()->get($uid, 'expire', 'photos', false);
2436
2437                 $expired = 0;
2438
2439                 $priority = DI::config()->get('system', 'expire-notify-priority');
2440
2441                 while ($item = Post::fetch($items)) {
2442                         // don't expire filed items
2443                         if (DBA::exists('post-category', ['uri-id' => $item['uri-id'], 'uid' => $item['uid'], 'type' => Post\Category::FILE])) {
2444                                 continue;
2445                         }
2446
2447                         // Only expire posts, not photos and photo comments
2448
2449                         if (!$expire_photos && !empty($item['resource-id'])) {
2450                                 continue;
2451                         } elseif (!$expire_starred && intval($item['starred'])) {
2452                                 continue;
2453                         } elseif (!$expire_notes && ($item['post-type'] == self::PT_PERSONAL_NOTE)) {
2454                                 continue;
2455                         } elseif (!$expire_items && ($item['post-type'] != self::PT_PERSONAL_NOTE)) {
2456                                 continue;
2457                         }
2458
2459                         self::markForDeletionById($item['id'], $priority);
2460
2461                         ++$expired;
2462                 }
2463                 DBA::close($items);
2464                 Logger::notice('User ' . $uid . ": expired $expired items; expire items: $expire_items, expire notes: $expire_notes, expire starred: $expire_starred, expire photos: $expire_photos");
2465         }
2466
2467         public static function firstPostDate(int $uid, bool $wall = false)
2468         {
2469                 $user = User::getById($uid, ['register_date']);
2470                 if (empty($user)) {
2471                         return false;
2472                 }
2473
2474                 $condition = ["`uid` = ? AND `wall` = ? AND NOT `deleted` AND `visible` AND `received` >= ?",
2475                         $uid, $wall, $user['register_date']];
2476                 $params = ['order' => ['received' => false]];
2477                 $thread = Post::selectFirstThread(['received'], $condition, $params);
2478                 if (DBA::isResult($thread)) {
2479                         $postdate = substr(DateTimeFormat::local($thread['received']), 0, 10);
2480                         return $postdate;
2481                 }
2482                 return false;
2483         }
2484
2485         /**
2486          * add/remove activity to an item
2487          *
2488          * Toggle activities as like,dislike,attend of an item
2489          *
2490          * @param int    $item_id
2491          * @param string $verb
2492          *            Activity verb. One of
2493          *            like, unlike, dislike, undislike, attendyes, unattendyes,
2494          *            attendno, unattendno, attendmaybe, unattendmaybe,
2495          *            announce, unannouce
2496          * @param int    $uid
2497          * @param string $allow_cid
2498          * @param string $allow_gid
2499          * @param string $deny_cid
2500          * @param string $deny_gid
2501          * @return bool
2502          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
2503          * @throws \ImagickException
2504          * @hook  'post_local_end'
2505          *            array $arr
2506          *            'post_id' => ID of posted item
2507          */
2508         public static function performActivity(int $item_id, string $verb, int $uid, string $allow_cid = null, string $allow_gid = null, string $deny_cid = null, string $deny_gid = null): bool
2509         {
2510                 if (empty($uid)) {
2511                         return false;
2512                 }
2513
2514                 Logger::notice('Start create activity', ['verb' => $verb, 'item' => $item_id, 'user' => $uid]);
2515
2516                 $item = Post::selectFirst(self::ITEM_FIELDLIST, ['id' => $item_id]);
2517                 if (!DBA::isResult($item)) {
2518                         Logger::notice('like: unknown item', ['id' => $item_id]);
2519                         return false;
2520                 }
2521
2522                 $uri_id = $item['uri-id'];
2523
2524                 if (!in_array($item['uid'], [0, $uid])) {
2525                         return false;
2526                 }
2527
2528                 if (!Post::exists(['uri-id' => $item['parent-uri-id'], 'uid' => $uid])) {
2529                         $stored = self::storeForUserByUriId($item['parent-uri-id'], $uid, ['post-reason' => Item::PR_ACTIVITY]);
2530                         if (($item['parent-uri-id'] == $item['uri-id']) && !empty($stored)) {
2531                                 $item = Post::selectFirst(self::ITEM_FIELDLIST, ['id' => $stored]);
2532                                 if (!DBA::isResult($item)) {
2533                                         Logger::info('Could not fetch just created item - should not happen', ['stored' => $stored, 'uid' => $uid, 'uri-id' => $uri_id]);
2534                                         return false;
2535                                 }
2536                         }
2537                 }
2538
2539                 // Retrieves the local post owner
2540                 $owner = User::getOwnerDataById($uid);
2541                 if (empty($owner)) {
2542                         Logger::info('Empty owner for user', ['uid' => $uid]);
2543                         return false;
2544                 }
2545
2546                 // Retrieve the current logged in user's public contact
2547                 $author_id = Contact::getPublicIdByUserId($uid);
2548                 if (empty($author_id)) {
2549                         Logger::info('Empty public contact');
2550                         return false;
2551                 }
2552
2553                 $activity = null;
2554                 switch ($verb) {
2555                         case 'like':
2556                         case 'unlike':
2557                                 $activity = Activity::LIKE;
2558                                 break;
2559                         case 'dislike':
2560                         case 'undislike':
2561                                 $activity = Activity::DISLIKE;
2562                                 break;
2563                         case 'attendyes':
2564                         case 'unattendyes':
2565                                 $activity = Activity::ATTEND;
2566                                 break;
2567                         case 'attendno':
2568                         case 'unattendno':
2569                                 $activity = Activity::ATTENDNO;
2570                                 break;
2571                         case 'attendmaybe':
2572                         case 'unattendmaybe':
2573                                 $activity = Activity::ATTENDMAYBE;
2574                                 break;
2575                         case 'follow':
2576                         case 'unfollow':
2577                                 $activity = Activity::FOLLOW;
2578                                 break;
2579                         case 'announce':
2580                         case 'unannounce':
2581                                 $activity = Activity::ANNOUNCE;
2582                                 break;
2583                         default:
2584                                 Logger::notice('unknown verb', ['verb' => $verb, 'item' => $item_id]);
2585                                 return false;
2586                 }
2587
2588                 $mode = Strings::startsWith($verb, 'un') ? 'delete' : 'create';
2589
2590                 // Enable activity toggling instead of on/off
2591                 $event_verb_flag = $activity === Activity::ATTEND || $activity === Activity::ATTENDNO || $activity === Activity::ATTENDMAYBE;
2592
2593                 // Look for an existing verb row
2594                 // Event participation activities are mutually exclusive, only one of them can exist at all times.
2595                 if ($event_verb_flag) {
2596                         $verbs = [Activity::ATTEND, Activity::ATTENDNO, Activity::ATTENDMAYBE];
2597
2598                         // Translate to the index based activity index
2599                         $vids = [];
2600                         foreach ($verbs as $verb) {
2601                                 $vids[] = Verb::getID($verb);
2602                         }
2603                 } else {
2604                         $vids = Verb::getID($activity);
2605                 }
2606
2607                 $condition = ['vid' => $vids, 'deleted' => false, 'gravity' => GRAVITY_ACTIVITY,
2608                         'author-id' => $author_id, 'uid' => $item['uid'], 'thr-parent-id' => $uri_id];
2609                 $like_item = Post::selectFirst(['id', 'guid', 'verb'], $condition);
2610
2611                 if (DBA::isResult($like_item)) {
2612                         /**
2613                          * Truth table for existing activities
2614                          *
2615                          * |          Inputs            ||      Outputs      |
2616                          * |----------------------------||-------------------|
2617                          * |  Mode  | Event | Same verb || Delete? | Return? |
2618                          * |--------|-------|-----------||---------|---------|
2619                          * | create |  Yes  |    Yes    ||   No    |   Yes   |
2620                          * | create |  Yes  |    No     ||   Yes   |   No    |
2621                          * | create |  No   |    Yes    ||   No    |   Yes   |
2622                          * | create |  No   |    No     ||        N/A†       |
2623                          * | delete |  Yes  |    Yes    ||   Yes   |   N/A‡  |
2624                          * | delete |  Yes  |    No     ||   No    |   N/A‡  |
2625                          * | delete |  No   |    Yes    ||   Yes   |   N/A‡  |
2626                          * | delete |  No   |    No     ||        N/A†       |
2627                          * |--------|-------|-----------||---------|---------|
2628                          * |   A    |   B   |     C     || A xor C | !B or C |
2629                          *
2630                          * † Can't happen: It's impossible to find an existing non-event activity without
2631                          *                 the same verb because we are only looking for this single verb.
2632                          *
2633                          * ‡ The "mode = delete" is returning early whether an existing activity was found or not.
2634                          */
2635                         if ($mode == 'create' xor $like_item['verb'] == $activity) {
2636                                 self::markForDeletionById($like_item['id']);
2637                         }
2638
2639                         if (!$event_verb_flag || $like_item['verb'] == $activity) {
2640                                 return true;
2641                         }
2642                 }
2643
2644                 // No need to go further if we aren't creating anything
2645                 if ($mode == 'delete') {
2646                         return true;
2647                 }
2648
2649                 $objtype = $item['resource-id'] ? Activity\ObjectType::IMAGE : Activity\ObjectType::NOTE;
2650
2651                 $new_item = [
2652                         'guid'          => System::createUUID(),
2653                         'uri'           => self::newURI(),
2654                         'uid'           => $uid,
2655                         'contact-id'    => $owner['id'],
2656                         'wall'          => $item['wall'],
2657                         'origin'        => 1,
2658                         'network'       => Protocol::DFRN,
2659                         'protocol'      => Conversation::PARCEL_DIRECT,
2660                         'direction'     => Conversation::PUSH,
2661                         'gravity'       => GRAVITY_ACTIVITY,
2662                         'parent'        => $item['id'],
2663                         'thr-parent'    => $item['uri'],
2664                         'owner-id'      => $author_id,
2665                         'author-id'     => $author_id,
2666                         'body'          => $activity,
2667                         'verb'          => $activity,
2668                         'object-type'   => $objtype,
2669                         'allow_cid'     => $allow_cid ?? $item['allow_cid'],
2670                         'allow_gid'     => $allow_gid ?? $item['allow_gid'],
2671                         'deny_cid'      => $deny_cid ?? $item['deny_cid'],
2672                         'deny_gid'      => $deny_gid ?? $item['deny_gid'],
2673                         'visible'       => 1,
2674                         'unseen'        => 1,
2675                 ];
2676
2677                 $signed = Diaspora::createLikeSignature($uid, $new_item);
2678                 if (!empty($signed)) {
2679                         $new_item['diaspora_signed_text'] = json_encode($signed);
2680                 }
2681
2682                 self::insert($new_item, true);
2683
2684                 // If the parent item isn't visible then set it to visible
2685                 // @todo Check if this is still needed
2686                 if (!$item['visible']) {
2687                         self::update(['visible' => true], ['id' => $item['id']]);
2688                 }
2689                 return true;
2690         }
2691
2692         /**
2693          * Fetch the SQL condition for the given user id
2694          *
2695          * @param integer $owner_id User ID for which the permissions should be fetched
2696          * @return array condition
2697          */
2698         public static function getPermissionsConditionArrayByUserId(int $owner_id): array
2699         {
2700                 $local_user = local_user();
2701                 $remote_user = Session::getRemoteContactID($owner_id);
2702
2703                 // default permissions - anonymous user
2704                 $condition = ["`private` != ?", self::PRIVATE];
2705
2706                 if ($local_user && ($local_user == $owner_id)) {
2707                         // Profile owner - everything is visible
2708                         $condition = [];
2709                 } elseif ($remote_user) {
2710                          // Authenticated visitor - fetch the matching permissionsets
2711                         $permissionSets = DI::permissionSet()->selectByContactId($remote_user, $owner_id);
2712                         if (!empty($set)) {
2713                                 $condition = ["(`private` != ? OR (`private` = ? AND `wall`
2714                                         AND `psid` IN (" . implode(', ', array_fill(0, count($set), '?')) . ")))",
2715                                         self::PRIVATE, self::PRIVATE];
2716                                 $condition = array_merge($condition, $permissionSets->column('id'));
2717                         }
2718                 }
2719
2720                 return $condition;
2721         }
2722
2723         /**
2724          * Get a permission SQL string for the given user
2725          *
2726          * @param int $owner_id
2727          * @param string $table
2728          * @return string
2729          */
2730         public static function getPermissionsSQLByUserId(int $owner_id, string $table = ''): string
2731         {
2732                 $local_user = local_user();
2733                 $remote_user = Session::getRemoteContactID($owner_id);
2734
2735                 if (!empty($table)) {
2736                         $table = DBA::quoteIdentifier($table) . '.';
2737                 }
2738
2739                 /*
2740                  * Construct permissions
2741                  *
2742                  * default permissions - anonymous user
2743                  */
2744                 $sql = sprintf(" AND " . $table . "`private` != %d", self::PRIVATE);
2745
2746                 // Profile owner - everything is visible
2747                 if ($local_user && ($local_user == $owner_id)) {
2748                         $sql = '';
2749                 } elseif ($remote_user) {
2750                         /*
2751                          * Authenticated visitor. Unless pre-verified,
2752                          * check that the contact belongs to this $owner_id
2753                          * and load the groups the visitor belongs to.
2754                          * If pre-verified, the caller is expected to have already
2755                          * done this and passed the groups into this function.
2756                          */
2757                         $permissionSets = DI::permissionSet()->selectByContactId($remote_user, $owner_id);
2758
2759                         if (!empty($set)) {
2760                                 $sql_set = sprintf(" OR (" . $table . "`private` = %d AND " . $table . "`wall` AND " . $table . "`psid` IN (", self::PRIVATE) . implode(',', $permissionSets->column('id')) . "))";
2761                         } else {
2762                                 $sql_set = '';
2763                         }
2764
2765                         $sql = sprintf(" AND (" . $table . "`private` != %d", self::PRIVATE) . $sql_set . ")";
2766                 }
2767
2768                 return $sql;
2769         }
2770
2771         /**
2772          * get translated item type
2773          *
2774          * @param array                $item
2775          * @param \Friendica\Core\L10n $l10n
2776          * @return string
2777          */
2778         public static function postType(array $item, \Friendica\Core\L10n $l10n): string
2779         {
2780                 if (!empty($item['event-id'])) {
2781                         return $l10n->t('event');
2782                 } elseif (!empty($item['resource-id'])) {
2783                         return $l10n->t('photo');
2784                 } elseif ($item['gravity'] == GRAVITY_ACTIVITY) {
2785                         return $l10n->t('activity');
2786                 } elseif ($item['gravity'] == GRAVITY_COMMENT) {
2787                         return $l10n->t('comment');
2788                 }
2789
2790                 return $l10n->t('post');
2791         }
2792
2793         /**
2794          * Sets the "rendered-html" field of the provided item
2795          *
2796          * Body is preserved to avoid side-effects as we modify it just-in-time for spoilers and private image links
2797          *
2798          * @param array $item
2799          *
2800          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
2801          * @todo Remove reference, simply return "rendered-html" and "rendered-hash"
2802          */
2803         private static function putInCache(&$item)
2804         {
2805                 // Save original body to prevent addons to modify it
2806                 $body = $item['body'];
2807
2808                 $rendered_hash = $item['rendered-hash'] ?? '';
2809                 $rendered_html = $item['rendered-html'] ?? '';
2810
2811                 if ($rendered_hash == ''
2812                         || $rendered_html == ''
2813                         || $rendered_hash != hash('md5', BBCode::VERSION . '::' . $body)
2814                         || DI::config()->get('system', 'ignore_cache')
2815                 ) {
2816                         $item['rendered-html'] = BBCode::convertForUriId($item['uri-id'], $item['body']);
2817                         $item['rendered-hash'] = hash('md5', BBCode::VERSION . '::' . $body);
2818
2819                         $hook_data = ['item' => $item, 'rendered-html' => $item['rendered-html'], 'rendered-hash' => $item['rendered-hash']];
2820                         Hook::callAll('put_item_in_cache', $hook_data);
2821                         $item['rendered-html'] = $hook_data['rendered-html'];
2822                         $item['rendered-hash'] = $hook_data['rendered-hash'];
2823                         unset($hook_data);
2824
2825                         // Update if the generated values differ from the existing ones
2826                         if ((($rendered_hash != $item['rendered-hash']) || ($rendered_html != $item['rendered-html'])) && !empty($item['id'])) {
2827                                 self::update(
2828                                         [
2829                                                 'rendered-html' => $item['rendered-html'],
2830                                                 'rendered-hash' => $item['rendered-hash']
2831                                         ],
2832                                         ['id' => $item['id']]
2833                                 );
2834                         }
2835                 }
2836
2837                 $item['body'] = $body;
2838         }
2839
2840         /**
2841          * Given an item array, convert the body element from bbcode to html and add smilie icons.
2842          * If attach is true, also add icons for item attachments.
2843          *
2844          * @param array   $item Record from item table
2845          * @param boolean $attach If true, add icons for item attachments as well
2846          * @param boolean $is_preview Whether this is a preview
2847          * @param boolean $only_cache Whether only cached HTML should be updated
2848          * @return string item body html
2849          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
2850          * @throws \ImagickException
2851          * @hook  prepare_body_init item array before any work
2852          * @hook  prepare_body_content_filter ('item'=>item array, 'filter_reasons'=>string array) before first bbcode to html
2853          * @hook  prepare_body ('item'=>item array, 'html'=>body string, 'is_preview'=>boolean, 'filter_reasons'=>string array) after first bbcode to html
2854          * @hook  prepare_body_final ('item'=>item array, 'html'=>body string) after attach icons and blockquote special case handling (spoiler, author)
2855          */
2856         public static function prepareBody(array &$item, bool $attach = false, bool $is_preview = false, bool $only_cache = false): string
2857         {
2858                 $a = DI::app();
2859                 Hook::callAll('prepare_body_init', $item);
2860
2861                 // In order to provide theme developers more possibilities, event items
2862                 // are treated differently.
2863                 if ($item['object-type'] === Activity\ObjectType::EVENT && isset($item['event-id'])) {
2864                         $ev = Event::getItemHTML($item);
2865                         return $ev;
2866                 }
2867
2868                 $tags = Tag::populateFromItem($item);
2869
2870                 $item['tags'] = $tags['tags'];
2871                 $item['hashtags'] = $tags['hashtags'];
2872                 $item['mentions'] = $tags['mentions'];
2873
2874                 $body = $item['body'] ?? '';
2875                 $shared = BBCode::fetchShareAttributes($body);
2876                 if (!empty($shared['guid'])) {
2877                         $shared_item = Post::selectFirst(['uri-id', 'plink', 'has-media'], ['guid' => $shared['guid']]);
2878                         $shared_uri_id = $shared_item['uri-id'] ?? 0;
2879                         $shared_links = [strtolower($shared_item['plink'] ?? '')];
2880                         $shared_attachments = Post\Media::splitAttachments($shared_uri_id, $shared['guid'], [], $shared_item['has-media'] ?? false);
2881                         $shared_links = array_merge($shared_links, array_column($shared_attachments['visual'], 'url'));
2882                         $shared_links = array_merge($shared_links, array_column($shared_attachments['link'], 'url'));
2883                         $shared_links = array_merge($shared_links, array_column($shared_attachments['additional'], 'url'));
2884                         $item['body'] = self::replaceVisualAttachments($shared_attachments, $item['body']);
2885                 } else {
2886                         $shared_uri_id = 0;
2887                         $shared_links = [];
2888                 }
2889
2890                 $attachments = Post\Media::splitAttachments($item['uri-id'], $item['guid'] ?? '', $shared_links, $item['has-media'] ?? false);
2891                 $item['body'] = self::replaceVisualAttachments($attachments, $item['body'] ?? '');
2892
2893                 $item['body'] = preg_replace("/\s*\[attachment .*?\].*?\[\/attachment\]\s*/ism", "\n", $item['body']);
2894                 self::putInCache($item);
2895                 $item['body'] = $body;
2896                 $s = $item["rendered-html"];
2897
2898                 if ($only_cache) {
2899                         return '';
2900                 }
2901
2902                 // Compile eventual content filter reasons
2903                 $filter_reasons = [];
2904                 if (!$is_preview && public_contact() != $item['author-id']) {
2905                         if (!empty($item['content-warning']) && (!local_user() || !DI::pConfig()->get(local_user(), 'system', 'disable_cw', false))) {
2906                                 $filter_reasons[] = DI::l10n()->t('Content warning: %s', $item['content-warning']);
2907                         }
2908
2909                         $item['attachments'] = $attachments;
2910
2911                         $hook_data = [
2912                                 'item' => $item,
2913                                 'filter_reasons' => $filter_reasons
2914                         ];
2915                         Hook::callAll('prepare_body_content_filter', $hook_data);
2916                         $filter_reasons = $hook_data['filter_reasons'];
2917                         unset($hook_data);
2918                 }
2919
2920                 $hook_data = [
2921                         'item' => $item,
2922                         'html' => $s,
2923                         'preview' => $is_preview,
2924                         'filter_reasons' => $filter_reasons
2925                 ];
2926                 Hook::callAll('prepare_body', $hook_data);
2927                 $s = $hook_data['html'];
2928                 unset($hook_data);
2929
2930                 if (!$attach) {
2931                         // Replace the blockquotes with quotes that are used in mails.
2932                         $mailquote = '<blockquote type="cite" class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">';
2933                         $s = str_replace(['<blockquote>', '<blockquote class="spoiler">', '<blockquote class="author">'], [$mailquote, $mailquote, $mailquote], $s);
2934                         return $s;
2935                 }
2936
2937                 if (!empty($shared_attachments)) {
2938                         $s = self::addVisualAttachments($shared_attachments, $item, $s, true);
2939                         $s = self::addLinkAttachment($shared_uri_id ?: $item['uri-id'], $shared_attachments, $body, $s, true, []);
2940                         $s = self::addNonVisualAttachments($shared_attachments, $item, $s, true);
2941                         $body = preg_replace("/\s*\[share .*?\].*?\[\/share\]\s*/ism", '', $body);
2942                 }
2943
2944                 $s = self::addVisualAttachments($attachments, $item, $s, false);
2945                 $s = self::addLinkAttachment($item['uri-id'], $attachments, $body, $s, false, $shared_links);
2946                 $s = self::addNonVisualAttachments($attachments, $item, $s, false);
2947                 $s = self::addQuestions($item, $s);
2948
2949                 // Map.
2950                 if (strpos($s, '<div class="map">') !== false && !empty($item['coord'])) {
2951                         $x = Map::byCoordinates(trim($item['coord']));
2952                         if ($x) {
2953                                 $s = preg_replace('/\<div class\=\"map\"\>/', '$0' . $x, $s);
2954                         }
2955                 }
2956
2957                 // Replace friendica image url size with theme preference.
2958                 if (!empty($a->getThemeInfoValue('item_image_size'))) {
2959                         $ps = $a->getThemeInfoValue('item_image_size');
2960                         $s = preg_replace('|(<img[^>]+src="[^"]+/photo/[0-9a-f]+)-[0-9]|', "$1-" . $ps, $s);
2961                 }
2962
2963                 $s = HTML::applyContentFilter($s, $filter_reasons);
2964
2965                 $hook_data = ['item' => $item, 'html' => $s];
2966                 Hook::callAll('prepare_body_final', $hook_data);
2967
2968                 return $hook_data['html'];
2969         }
2970
2971         /**
2972          * Check if the body contains a link
2973          *
2974          * @param string $body
2975          * @param string $url
2976          * @param int    $type
2977          * @return bool
2978          */
2979         public static function containsLink(string $body, string $url, int $type = 0): bool
2980         {
2981                 // Make sure that for example site parameters aren't used when testing if the link is contained in the body
2982                 $urlparts = parse_url($url);
2983                 if (!empty($urlparts)) {
2984                         unset($urlparts['query']);
2985                         unset($urlparts['fragment']);
2986                         $url = (string)Uri::fromParts($urlparts);
2987                 } else {
2988                         return false;
2989                 }
2990
2991                 // Remove media links to only search in embedded content
2992                 // @todo Check images for image link, audio for audio links, ...
2993                 if (in_array($type, [Post\Media::AUDIO, Post\Media::VIDEO, Post\Media::IMAGE])) {
2994                         $body = preg_replace("/\[url=[^\[\]]*\](.*)\[\/url\]/Usi", ' $1 ', $body);
2995                 }
2996
2997                 if (strpos($body, $url)) {
2998                         return true;
2999                 }
3000                 foreach ([0, 1, 2] as $size) {
3001                         if (preg_match('#/photo/.*-' . $size . '\.#ism', $url) &&
3002                                 strpos(preg_replace('#(/photo/.*)-[012]\.#ism', '$1-' . $size . '.', $body), $url)) {
3003                                 return true;
3004                         }
3005                 }
3006                 return false;
3007         }
3008
3009         /**
3010          * Replace visual attachments in the body
3011          *
3012          * @param array $attachments
3013          * @param string $body
3014          * @return string modified body
3015          */
3016         private static function replaceVisualAttachments(array $attachments, string $body): string
3017         {
3018                 DI::profiler()->startRecording('rendering');
3019
3020                 foreach ($attachments['visual'] as $attachment) {
3021                         if (!empty($attachment['preview'])) {
3022                                 $proxy   = Post\Media::getPreviewUrlForId($attachment['id'], Proxy::SIZE_LARGE);
3023                                 $search  = ['[img=' . $attachment['preview'] . ']', ']' . $attachment['preview'] . '[/img]'];
3024                                 $replace = ['[img=' . $proxy . ']', ']' . $proxy . '[/img]'];
3025
3026                                 $body = str_replace($search, $replace, $body);
3027                         } elseif ($attachment['filetype'] == 'image') {
3028                                 $proxy   = Post\Media::getUrlForId($attachment['id']);
3029                                 $search  = ['[img=' . $attachment['url'] . ']', ']' . $attachment['url'] . '[/img]'];
3030                                 $replace = ['[img=' . $proxy . ']', ']' . $proxy . '[/img]'];
3031
3032                                 $body = str_replace($search, $replace, $body);
3033                         }
3034                 }
3035                 DI::profiler()->stopRecording();
3036                 return $body;
3037         }
3038
3039         /**
3040          * Add visual attachments to the content
3041          *
3042          * @param array $attachments
3043          * @param array $item
3044          * @param string $content
3045          * @return string modified content
3046          */
3047         private static function addVisualAttachments(array $attachments, array $item, string $content, bool $shared): string
3048         {
3049                 DI::profiler()->startRecording('rendering');
3050                 $leading = '';
3051                 $trailing = '';
3052
3053                 // @todo In the future we should make a single for the template engine with all media in it. This allows more flexibilty.
3054                 foreach ($attachments['visual'] as $attachment) {
3055                         if (self::containsLink($item['body'], $attachment['preview'] ?? $attachment['url'], $attachment['type'])) {
3056                                 continue;
3057                         }
3058
3059                         if (!empty($attachment['preview'])) {
3060                                 $preview_url = Post\Media::getPreviewUrlForId($attachment['id'], Proxy::SIZE_LARGE);
3061                         } else {
3062                                 $preview_url = '';
3063                         }
3064
3065                         if (($attachment['filetype'] == 'video')) {
3066                                 /// @todo Move the template to /content as well
3067                                 $media = Renderer::replaceMacros(Renderer::getMarkupTemplate('video_top.tpl'), [
3068                                         '$video' => [
3069                                                 'id'      => $attachment['id'],
3070                                                 'src'     => $attachment['url'],
3071                                                 'name'    => $attachment['name'] ?: $attachment['url'],
3072                                                 'preview' => $preview_url,
3073                                                 'mime'    => $attachment['mimetype'],
3074                                         ],
3075                                 ]);
3076                                 if (($item['post-type'] ?? null) == Item::PT_VIDEO) {
3077                                         $leading .= $media;
3078                                 } else {
3079                                         $trailing .= $media;
3080                                 }
3081                         } elseif ($attachment['filetype'] == 'audio') {
3082                                 $media = Renderer::replaceMacros(Renderer::getMarkupTemplate('content/audio.tpl'), [
3083                                         '$audio' => [
3084                                                 'id'     => $attachment['id'],
3085                                                 'src'    => $attachment['url'],
3086                                                 'name'   => $attachment['name'] ?: $attachment['url'],
3087                                                 'mime'   => $attachment['mimetype'],
3088                                         ],
3089                                 ]);
3090                                 if (($item['post-type'] ?? null) == Item::PT_AUDIO) {
3091                                         $leading .= $media;
3092                                 } else {
3093                                         $trailing .= $media;
3094                                 }
3095                         } elseif ($attachment['filetype'] == 'image') {
3096                                 $media = Renderer::replaceMacros(Renderer::getMarkupTemplate('content/image.tpl'), [
3097                                         '$image' => [
3098                                                 'src'        => Post\Media::getUrlForId($attachment['id']),
3099                                                 'preview'    => Post\Media::getPreviewUrlForId($attachment['id'], ($attachment['width'] > $attachment['height']) ? Proxy::SIZE_MEDIUM : Proxy::SIZE_LARGE),
3100                                                 'attachment' => $attachment,
3101                                         ],
3102                                 ]);
3103                                 // On Diaspora posts the attached pictures are leading
3104                                 if ($item['network'] == Protocol::DIASPORA) {
3105                                         $leading .= $media;
3106                                 } else {
3107                                         $trailing .= $media;
3108                                 }
3109                         }
3110                 }
3111
3112                 if ($shared) {
3113                         $content = str_replace(BBCode::TOP_ANCHOR, '<div class="body-attach">' . $leading . '<div class="clear"></div></div>' . BBCode::TOP_ANCHOR, $content);
3114                         $content = str_replace(BBCode::BOTTOM_ANCHOR, '<div class="body-attach">' . $trailing . '<div class="clear"></div></div>' . BBCode::BOTTOM_ANCHOR, $content);
3115                 } else {
3116                         if ($leading != '') {
3117                                 $content = '<div class="body-attach">' . $leading . '<div class="clear"></div></div>' . $content;
3118                         }
3119
3120                         if ($trailing != '') {
3121                                 $content .= '<div class="body-attach">' . $trailing . '<div class="clear"></div></div>';
3122                         }
3123                 }
3124
3125                 DI::profiler()->stopRecording();
3126                 return $content;
3127         }
3128
3129         /**
3130          * Add link attachment to the content
3131          *
3132          * @param array  $attachments
3133          * @param string $body
3134          * @param string $content
3135          * @param bool   $shared
3136          * @param array  $ignore_links A list of URLs to ignore
3137          * @return string modified content
3138          */
3139         private static function addLinkAttachment(int $uriid, array $attachments, string $body, string $content, bool $shared, array $ignore_links): string
3140         {
3141                 DI::profiler()->startRecording('rendering');
3142                 // Don't show a preview when there is a visual attachment (audio or video)
3143                 $types = array_column($attachments['visual'], 'type');
3144                 $preview = !in_array(Post\Media::IMAGE, $types) && !in_array(Post\Media::VIDEO, $types);
3145
3146                 if (!empty($attachments['link'])) {
3147                         foreach ($attachments['link'] as $link) {
3148                                 $found = false;
3149                                 foreach ($ignore_links as $ignore_link) {
3150                                         if (Strings::compareLink($link['url'], $ignore_link)) {
3151                                                 $found = true;
3152                                         }
3153                                 }
3154                                 // @todo Judge between the links to use the one with most information
3155                                 if (!$found && (empty($attachment) || !empty($link['author-name']) ||
3156                                         (empty($attachment['name']) && !empty($link['name'])) ||
3157                                         (empty($attachment['description']) && !empty($link['description'])) ||
3158                                         (empty($attachment['preview']) && !empty($link['preview'])))) {
3159                                         $attachment = $link;
3160                                 }
3161                         }
3162                 }
3163
3164                 if (!empty($attachment)) {
3165                         $data = [
3166                                 'after' => '',
3167                                 'author_name' => $attachment['author-name'] ?? '',
3168                                 'author_url' =>  $attachment['author-url'] ?? '',
3169                                 'description' => $attachment['description'] ?? '',
3170                                 'image' => '',
3171                                 'preview' => '',
3172                                 'provider_name' => $attachment['publisher-name'] ?? '',
3173                                 'provider_url' => $attachment['publisher-url'] ?? '',
3174                                 'text' => '',
3175                                 'title' => $attachment['name'] ?? '',
3176                                 'type' => 'link',
3177                                 'url' => $attachment['url']];
3178
3179                         if ($preview && !empty($attachment['preview'])) {
3180                                 if ($attachment['preview-width'] >= 500) {
3181                                         $data['image'] = Post\Media::getPreviewUrlForId($attachment['id'], Proxy::SIZE_MEDIUM);
3182                                 } else {
3183                                         $data['preview'] = Post\Media::getPreviewUrlForId($attachment['id'], Proxy::SIZE_MEDIUM);
3184                                 }
3185                         }
3186
3187                         if (!empty($data['description']) && !empty($content)) {
3188                                 similar_text($data['description'], $content, $percent);
3189                         } else {
3190                                 $percent = 0;
3191                         }
3192
3193                         if (!empty($data['description']) && (($data['title'] == $data['description']) || ($percent > 95) || (strpos($content, $data['description']) !== false))) {
3194                                 $data['description'] = '';
3195                         }
3196
3197                         if (($data['author_name'] ?? '') == ($data['provider_name'] ?? '')) {
3198                                 $data['author_name'] = '';
3199                         }
3200
3201                         if (($data['author_url'] ?? '') == ($data['provider_url'] ?? '')) {
3202                                 $data['author_url'] = '';
3203                         }
3204                 } elseif (preg_match("/.*(\[attachment.*?\].*?\[\/attachment\]).*/ism", $body, $match)) {
3205                         $data = BBCode::getAttachmentData($match[1]);
3206                 }
3207                 DI::profiler()->stopRecording();
3208
3209                 if (isset($data['url']) && !in_array($data['url'], $ignore_links)) {
3210                         if (!empty($data['description']) || !empty($data['image']) || !empty($data['preview'])) {
3211                                 $parts = parse_url($data['url']);
3212                                 if (!empty($parts['scheme']) && !empty($parts['host'])) {
3213                                         if (empty($data['provider_name'])) {
3214                                                 $data['provider_name'] = $parts['host'];
3215                                         }
3216                                         if (empty($data['provider_url']) || empty(parse_url($data['provider_url'], PHP_URL_SCHEME))) {
3217                                                 $data['provider_url'] = $parts['scheme'] . '://' . $parts['host'];
3218
3219                                                 if (!empty($parts['port'])) {
3220                                                         $data['provider_url'] .= ':' . $parts['port'];
3221                                                 }
3222                                         }
3223                                 }
3224
3225                                 // @todo Use a template
3226                                 $rendered = BBCode::convertAttachment('', BBCode::INTERNAL, false, $data, $uriid);
3227                         } elseif (!self::containsLink($content, $data['url'], Post\Media::HTML)) {
3228                                 $rendered = Renderer::replaceMacros(Renderer::getMarkupTemplate('content/link.tpl'), [
3229                                         '$url'  => $data['url'],
3230                                         '$title' => $data['title'],
3231                                 ]);
3232                         } else {
3233                                 return $content;
3234                         }
3235
3236                         if ($shared) {
3237                                 return str_replace(BBCode::BOTTOM_ANCHOR, BBCode::BOTTOM_ANCHOR . $rendered, $content);
3238                         } else {
3239                                 return $content . $rendered;
3240                         }
3241                 }
3242                 return $content;
3243         }
3244
3245         /**
3246          * Add non visual attachments to the content
3247          *
3248          * @param array $attachments
3249          * @param array $item
3250          * @param string $content
3251          * @return string modified content
3252          */
3253         private static function addNonVisualAttachments(array $attachments, array $item, string $content): string
3254         {
3255                 DI::profiler()->startRecording('rendering');
3256                 $trailing = '';
3257                 foreach ($attachments['additional'] as $attachment) {
3258                         if (strpos($item['body'], $attachment['url'])) {
3259                                 continue;
3260                         }
3261
3262                         $author = ['uid' => 0, 'id' => $item['author-id'],
3263                                 'network' => $item['author-network'], 'url' => $item['author-link']];
3264                         $the_url = Contact::magicLinkByContact($author, $attachment['url']);
3265
3266                         $title = Strings::escapeHtml(trim(($attachment['description'] ?? '') ?: $attachment['url']));
3267
3268                         if (!empty($attachment['size'])) {
3269                                 $title .= ' ' . $attachment['size'] . ' ' . DI::l10n()->t('bytes');
3270                         }
3271
3272                         /// @todo Use a template
3273                         $icon = '<div class="attachtype icon s22 type-' . $attachment['filetype'] . ' subtype-' . $attachment['subtype'] . '"></div>';
3274                         $trailing .= '<a href="' . strip_tags($the_url) . '" title="' . $title . '" class="attachlink" target="_blank" rel="noopener noreferrer" >' . $icon . '</a>';
3275                 }
3276
3277                 if ($trailing != '') {
3278                         $content .= '<div class="body-attach">' . $trailing . '<div class="clear"></div></div>';
3279                 }
3280
3281                 DI::profiler()->stopRecording();
3282                 return $content;
3283         }
3284
3285         private static function addQuestions(array $item, string $content): string
3286         {
3287                 DI::profiler()->startRecording('rendering');
3288                 if (!empty($item['question-id'])) {
3289                         $question = [
3290                                 'id'       => $item['question-id'],
3291                                 'multiple' => $item['question-multiple'],
3292                                 'voters'   => $item['question-voters'],
3293                                 'endtime'  => $item['question-end-time']
3294                         ];
3295
3296                         $options = Post\QuestionOption::getByURIId($item['uri-id']);
3297                         foreach ($options as $key => $option) {
3298                                 if ($question['voters'] > 0) {
3299                                         $percent = $option['replies'] / $question['voters'] * 100;
3300                                         $options[$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));
3301                                 } else {
3302                                         $options[$key]['vote'] = DI::l10n()->tt('%2$s (%1$d vote)', '%2$s (%1$d votes)', $option['replies'], $option['name'], );
3303                                 }
3304                         }
3305
3306                         if (!empty($question['voters']) && !empty($question['endtime'])) {
3307                                 $summary = DI::l10n()->tt('%d voter. Poll end: %s', '%d voters. Poll end: %s', $question['voters'], Temporal::getRelativeDate($question['endtime']));
3308                         } elseif (!empty($question['voters'])) {
3309                                 $summary = DI::l10n()->tt('%d voter.', '%d voters.', $question['voters']);
3310                         } elseif (!empty($question['endtime'])) {
3311                                 $summary = DI::l10n()->t('Poll end: %s', Temporal::getRelativeDate($question['endtime']));
3312                         } else {
3313                                 $summary = '';
3314                         }
3315
3316                         $content .= Renderer::replaceMacros(Renderer::getMarkupTemplate('content/question.tpl'), [
3317                                 '$question' => $question,
3318                                 '$options'  => $options,
3319                                 '$summary'  => $summary,
3320                         ]);
3321         }
3322                 DI::profiler()->stopRecording();
3323                 return $content;
3324         }
3325
3326         /**
3327          * get private link for item
3328          *
3329          * @param array $item
3330          * @return boolean|array False if item has not plink, otherwise array('href'=>plink url, 'title'=>translated title)
3331          * @throws \Exception
3332          */
3333         public static function getPlink(array $item)
3334         {
3335                 if (!empty($item['plink']) && Network::isValidHttpUrl($item['plink'])) {
3336                         $plink = $item['plink'];
3337                 } elseif (!empty($item['uri']) && Network::isValidHttpUrl($item['uri']) && !Network::isLocalLink($item['uri'])) {
3338                         $plink = $item['uri'];
3339                 }
3340
3341                 if (local_user()) {
3342                         $ret = [
3343                                 'href' => "display/" . $item['guid'],
3344                                 'orig' => "display/" . $item['guid'],
3345                                 'title' => DI::l10n()->t('View on separate page'),
3346                                 'orig_title' => DI::l10n()->t('View on separate page'),
3347                         ];
3348
3349                         if (!empty($plink) && ($item['private'] == self::PRIVATE)) {
3350                                 $author = ['uid' => 0, 'id' => $item['author-id'],
3351                                         'network' => $item['author-network'], 'url' => $item['author-link']];
3352                                 $plink = Contact::magicLinkByContact($author, $plink);
3353                         }
3354
3355                         if (!empty($plink)) {
3356                                 $ret['href'] = DI::baseUrl()->remove($plink);
3357                                 $ret['title'] = DI::l10n()->t('Link to source');
3358                         }
3359                 } elseif (!empty($plink) && ($item['private'] != self::PRIVATE)) {
3360                         $ret = [
3361                                 'href' => $plink,
3362                                 'orig' => $plink,
3363                                 'title' => DI::l10n()->t('Link to source'),
3364                                 'orig_title' => DI::l10n()->t('Link to source'),
3365                         ];
3366                 } else {
3367                         $ret = [];
3368                 }
3369
3370                 return $ret;
3371         }
3372
3373         /**
3374          * Does the given uri-id belongs to a post that is sent as starting post to a forum?
3375          *
3376          * @param int $uri_id
3377          *
3378          * @return boolean "true" when it is a forum post
3379          */
3380         public static function isForumPost(int $uri_id): bool
3381         {
3382                 foreach (Tag::getByURIId($uri_id, [Tag::EXCLUSIVE_MENTION]) as $tag) {
3383                         if (DBA::exists('contact', ['uid' => 0, 'nurl' => Strings::normaliseLink($tag['url']), 'contact-type' => Contact::TYPE_COMMUNITY])) {
3384                                 return true;
3385                         }
3386                 }
3387                 return false;
3388         }
3389
3390         /**
3391          * Search item id for given URI or plink
3392          *
3393          * @param string $uri
3394          * @param integer $uid
3395          *
3396          * @return integer item id
3397          */
3398         public static function searchByLink(string $uri, int $uid = 0): int
3399         {
3400                 $ssl_uri = str_replace('http://', 'https://', $uri);
3401                 $uris = [$uri, $ssl_uri, Strings::normaliseLink($uri)];
3402
3403                 $item = Post::selectFirst(['id'], ['uri' => $uris, 'uid' => $uid]);
3404                 if (DBA::isResult($item)) {
3405                         return $item['id'];
3406                 }
3407
3408                 $item = Post::selectFirst(['id'], ['plink' => $uris, 'uid' => $uid]);
3409                 if (DBA::isResult($item)) {
3410                         return $item['id'];
3411                 }
3412
3413                 return 0;
3414         }
3415
3416         /**
3417          * Return the URI for a link to the post
3418          *
3419          * @param string $uri URI or link to post
3420          *
3421          * @return string URI
3422          */
3423         public static function getURIByLink(string $uri): string
3424         {
3425                 $ssl_uri = str_replace('http://', 'https://', $uri);
3426                 $uris = [$uri, $ssl_uri, Strings::normaliseLink($uri)];
3427
3428                 $item = Post::selectFirst(['uri'], ['uri' => $uris]);
3429                 if (DBA::isResult($item)) {
3430                         return $item['uri'];
3431                 }
3432
3433                 $item = Post::selectFirst(['uri'], ['plink' => $uris]);
3434                 if (DBA::isResult($item)) {
3435                         return $item['uri'];
3436                 }
3437
3438                 return '';
3439         }
3440
3441         /**
3442          * Fetches item for given URI or plink
3443          *
3444          * @param string $uri
3445          * @param integer $uid
3446          *
3447          * @return integer item id
3448          */
3449         public static function fetchByLink(string $uri, int $uid = 0): int
3450         {
3451                 Logger::info('Trying to fetch link', ['uid' => $uid, 'uri' => $uri]);
3452                 $item_id = self::searchByLink($uri, $uid);
3453                 if (!empty($item_id)) {
3454                         Logger::info('Link found', ['uid' => $uid, 'uri' => $uri, 'id' => $item_id]);
3455                         return $item_id;
3456                 }
3457
3458                 $hookData = [
3459                         'uri'     => $uri,
3460                         'uid'     => $uid,
3461                         'item_id' => null,
3462                 ];
3463
3464                 Hook::callAll('item_by_link', $hookData);
3465
3466                 if (isset($hookData['item_id'])) {
3467                         return is_numeric($hookData['item_id']) ? $hookData['item_id'] : 0;
3468                 }
3469
3470                 $fetched_uri = ActivityPub\Processor::fetchMissingActivity($uri);
3471
3472                 if ($fetched_uri) {
3473                         $item_id = self::searchByLink($fetched_uri, $uid);
3474                 } else {
3475                         $item_id = Diaspora::fetchByURL($uri);
3476                 }
3477
3478                 if (!empty($item_id)) {
3479                         Logger::info('Link fetched', ['uid' => $uid, 'uri' => $uri, 'id' => $item_id]);
3480                         return $item_id;
3481                 }
3482
3483                 Logger::info('Link not found', ['uid' => $uid, 'uri' => $uri]);
3484                 return 0;
3485         }
3486
3487         /**
3488          * Return share data from an item array (if the item is shared item)
3489          * We are providing the complete Item array, because at some time in the future
3490          * we hopefully will define these values not in the body anymore but in some item fields.
3491          * This function is meant to replace all similar functions in the system.
3492          *
3493          * @param array $item
3494          *
3495          * @return array with share information
3496          */
3497         public static function getShareArray(array $item): array
3498         {
3499                 return BBCode::fetchShareAttributes($item['body']);
3500         }
3501
3502         /**
3503          * Fetch item information for shared items from the original items and adds it.
3504          *
3505          * @param array $item
3506          *
3507          * @return array item array with data from the original item
3508          */
3509         public static function addShareDataFromOriginal(array $item): array
3510         {
3511                 $shared = self::getShareArray($item);
3512                 if (empty($shared)) {
3513                         return $item;
3514                 }
3515
3516                 // Real reshares always have got a GUID.
3517                 if (empty($shared['guid'])) {
3518                         return $item;
3519                 }
3520
3521                 $uid = $item['uid'] ?? 0;
3522
3523                 // first try to fetch the item via the GUID. This will work for all reshares that had been created on this system
3524                 $shared_item = Post::selectFirst(['title', 'body'], ['guid' => $shared['guid'], 'uid' => [0, $uid]]);
3525                 if (!DBA::isResult($shared_item)) {
3526                         if (empty($shared['link'])) {
3527                                 return $item;
3528                         }
3529
3530                         // Otherwhise try to find (and possibly fetch) the item via the link. This should work for Diaspora and ActivityPub posts
3531                         $id = self::fetchByLink($shared['link'] ?? '', $uid);
3532                         if (empty($id)) {
3533                                 Logger::info('Original item not found', ['url' => $shared['link'] ?? '', 'callstack' => System::callstack()]);
3534                                 return $item;
3535                         }
3536
3537                         $shared_item = Post::selectFirst(['title', 'body'], ['id' => $id]);
3538                         if (!DBA::isResult($shared_item)) {
3539                                 return $item;
3540                         }
3541                         Logger::info('Got shared data from url', ['url' => $shared['link'], 'callstack' => System::callstack()]);
3542                 } else {
3543                         Logger::info('Got shared data from guid', ['guid' => $shared['guid'], 'callstack' => System::callstack()]);
3544                 }
3545
3546                 if (!empty($shared_item['title'])) {
3547                         $body = '[h3]' . $shared_item['title'] . "[/h3]\n" . $shared_item['body'];
3548                         unset($shared_item['title']);
3549                 } else {
3550                         $body = $shared_item['body'];
3551                 }
3552
3553                 $item['body'] = preg_replace("/\[share ([^\[\]]*)\].*\[\/share\]/ism", '[share $1]' . str_replace('$', '\$', $body) . '[/share]', $item['body']);
3554                 unset($shared_item['body']);
3555
3556                 return array_merge($item, $shared_item);
3557         }
3558
3559         /**
3560          * Check a prospective item array against user-level permissions
3561          *
3562          * @param array $item Expected keys: uri, gravity, and
3563          *                    author-link if is author-id is set,
3564          *                    owner-link if is owner-id is set,
3565          *                    causer-link if is causer-id is set.
3566          * @param int   $user_id Local user ID
3567          * @return bool
3568          * @throws \Exception
3569          */
3570         protected static function isAllowedByUser(array $item, int $user_id): bool
3571         {
3572                 if (!empty($item['author-id']) && Contact\User::isBlocked($item['author-id'], $user_id)) {
3573                         Logger::notice('Author is blocked by user', ['author-link' => $item['author-link'], 'uid' => $user_id, 'item-uri' => $item['uri']]);
3574                         return false;
3575                 }
3576
3577                 if (!empty($item['owner-id']) && Contact\User::isBlocked($item['owner-id'], $user_id)) {
3578                         Logger::notice('Owner is blocked by user', ['owner-link' => $item['owner-link'], 'uid' => $user_id, 'item-uri' => $item['uri']]);
3579                         return false;
3580                 }
3581
3582                 // The causer is set during a thread completion, for example because of a reshare. It countains the responsible actor.
3583                 if (!empty($item['causer-id']) && Contact\User::isBlocked($item['causer-id'], $user_id)) {
3584                         Logger::notice('Causer is blocked by user', ['causer-link' => $item['causer-link'] ?? $item['causer-id'], 'uid' => $user_id, 'item-uri' => $item['uri']]);
3585                         return false;
3586                 }
3587
3588                 if (!empty($item['causer-id']) && ($item['gravity'] === GRAVITY_PARENT) && Contact\User::isIgnored($item['causer-id'], $user_id)) {
3589                         Logger::notice('Causer is ignored by user', ['causer-link' => $item['causer-link'] ?? $item['causer-id'], 'uid' => $user_id, 'item-uri' => $item['uri']]);
3590                         return false;
3591                 }
3592
3593                 return true;
3594         }
3595
3596         /**
3597          * Improve the data in shared posts
3598          *
3599          * @param array $item
3600          * @return string body
3601          */
3602         public static function improveSharedDataInBody(array $item): string
3603         {
3604                 $shared = BBCode::fetchShareAttributes($item['body']);
3605                 if (empty($shared['link'])) {
3606                         return $item['body'];
3607                 }
3608
3609                 $id = self::fetchByLink($shared['link']);
3610                 Logger::info('Fetched shared post', ['uri-id' => $item['uri-id'], 'id' => $id, 'author' => $shared['profile'], 'url' => $shared['link'], 'guid' => $shared['guid'], 'callstack' => System::callstack()]);
3611                 if (!$id) {
3612                         return $item['body'];
3613                 }
3614
3615                 $shared_item = Post::selectFirst(['author-name', 'author-link', 'author-avatar', 'plink', 'created', 'guid', 'title', 'body'], ['id' => $id]);
3616                 if (!DBA::isResult($shared_item)) {
3617                         return $item['body'];
3618                 }
3619
3620                 $shared_content = BBCode::getShareOpeningTag($shared_item['author-name'], $shared_item['author-link'], $shared_item['author-avatar'], $shared_item['plink'], $shared_item['created'], $shared_item['guid']);
3621
3622                 if (!empty($shared_item['title'])) {
3623                         $shared_content .= '[h3]'.$shared_item['title'].'[/h3]'."\n";
3624                 }
3625
3626                 $shared_content .= $shared_item['body'];
3627
3628                 $item['body'] = preg_replace("/\[share.*?\](.*)\[\/share\]/ism", $shared_content . '[/share]', $item['body']);
3629                 Logger::info('New shared data', ['uri-id' => $item['uri-id'], 'id' => $id, 'shared_item' => $shared_item]);
3630                 return $item['body'];
3631         }
3632 }