src/Model/Item.php

   1 <?php
   2 /**
   3  * @copyright Copyright (C) 2020, Friendica
   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\Database\DBStructure;
  36 use Friendica\DI;
  37 use Friendica\Model\Post;
  38 use Friendica\Protocol\Activity;
  39 use Friendica\Protocol\ActivityPub;
  40 use Friendica\Protocol\Diaspora;
  41 use Friendica\Util\DateTimeFormat;
  42 use Friendica\Util\Map;
  43 use Friendica\Util\Network;
  44 use Friendica\Util\Strings;
  45 use Friendica\Worker\Delivery;
  46 use Friendica\Repository\PermissionSet as RepPermissionSet;
  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_TAG = 64;
  61         const PT_TO = 65;
  62         const PT_CC = 66;
  63         const PT_BTO = 67;
  64         const PT_BCC = 68;
  65         const PT_FOLLOWER = 69;
  66         const PT_ANNOUNCEMENT = 70;
  67         const PT_COMMENT = 71;
  68         const PT_STORED = 72;
  69         const PT_GLOBAL = 73;
  70         const PT_RELAY = 74;
  71         const PT_FETCHED = 75;
  72         const PT_PERSONAL_NOTE = 128;
  73
  74         // Field list that is used to display the items
  75         const DISPLAY_FIELDLIST = [
  76                 'uid', 'id', 'parent', 'uri-id', 'uri', 'thr-parent', 'parent-uri', 'guid', 'network', 'gravity',
  77                 'commented', 'created', 'edited', 'received', 'verb', 'object-type', 'postopts', 'plink',
  78                 'wall', 'private', 'starred', 'origin', 'title', 'body', 'file', 'language',
  79                 'content-warning', 'location', 'coord', 'app', 'rendered-hash', 'rendered-html', 'object',
  80                 'allow_cid', 'allow_gid', 'deny_cid', 'deny_gid', 'item_id',
  81                 'author-id', 'author-link', 'author-name', 'author-avatar', 'author-network',
  82                 'owner-id', 'owner-link', 'owner-name', 'owner-avatar', 'owner-network',
  83                 'causer-id', 'causer-link', 'causer-name', 'causer-avatar', 'causer-contact-type',
  84                 'contact-id', 'contact-uid', 'contact-link', 'contact-name', 'contact-avatar',
  85                 'writable', 'self', 'cid', 'alias', 'pinned',
  86                 'event-id', 'event-created', 'event-edited', 'event-start', 'event-finish',
  87                 'event-summary', 'event-desc', 'event-location', 'event-type',
  88                 'event-nofinish', 'event-adjust', 'event-ignore', 'event-id',
  89                 'delivery_queue_count', 'delivery_queue_done', 'delivery_queue_failed'
  90         ];
  91
  92         // Field list that is used to deliver items via the protocols
  93         const DELIVER_FIELDLIST = ['uid', 'id', 'parent', 'uri-id', 'uri', 'thr-parent', 'parent-uri', 'guid',
  94                         'parent-guid', 'created', 'edited', 'verb', 'object-type', 'object', 'target',
  95                         'private', 'title', 'body', 'location', 'coord', 'app',
  96                         'deleted', 'extid', 'post-type', 'gravity',
  97                         'allow_cid', 'allow_gid', 'deny_cid', 'deny_gid',
  98                         'author-id', 'author-link', 'owner-link', 'contact-uid',
  99                         'signed_text', 'signature', 'signer', 'network'];
 100
 101         // Field list for "item-content" table that is mixed with the item table
 102         const MIXED_CONTENT_FIELDLIST = ['title', 'content-warning', 'body', 'location',
 103                         'coord', 'app', 'rendered-hash', 'rendered-html', 'verb',
 104                         'object-type', 'object', 'target-type', 'target', 'plink'];
 105
 106         // Field list for "item-content" table that is not present in the "item" table
 107         const CONTENT_FIELDLIST = ['language', 'raw-body'];
 108
 109         // All fields in the item table
 110         const ITEM_FIELDLIST = ['id', 'uid', 'parent', 'uri', 'parent-uri', 'thr-parent',
 111                         'guid', 'uri-id', 'parent-uri-id', 'thr-parent-id', 'vid',
 112                         'contact-id', 'type', 'wall', 'gravity', 'extid', 'icid', 'psid',
 113                         'created', 'edited', 'commented', 'received', 'changed', 'verb',
 114                         'postopts', 'plink', 'resource-id', 'event-id', 'inform',
 115                         'file', 'allow_cid', 'allow_gid', 'deny_cid', 'deny_gid', 'post-type',
 116                         'private', 'pubmail', 'moderated', 'visible', 'starred', 'bookmark',
 117                         'unseen', 'deleted', 'origin', 'forum_mode', 'mention', 'global', 'network',
 118                         'title', 'content-warning', 'body', 'location', 'coord', 'app',
 119                         'rendered-hash', 'rendered-html', 'object-type', 'object', 'target-type', 'target',
 120                         'author-id', 'author-link', 'author-name', 'author-avatar', 'author-network',
 121                         'owner-id', 'owner-link', 'owner-name', 'owner-avatar', 'causer-id'];
 122
 123         // List of all verbs that don't need additional content data.
 124         // Never reorder or remove entries from this list. Just add new ones at the end, if needed.
 125         const ACTIVITIES = [
 126                 Activity::LIKE, Activity::DISLIKE,
 127                 Activity::ATTEND, Activity::ATTENDNO, Activity::ATTENDMAYBE,
 128                 Activity::FOLLOW,
 129                 Activity::ANNOUNCE];
 130
 131         const PUBLIC = 0;
 132         const PRIVATE = 1;
 133         const UNLISTED = 2;
 134
 135         const TABLES = ['item', 'user-item', 'item-content', 'post-delivery-data', 'diaspora-interaction'];
 136
 137         private static $legacy_mode = null;
 138
 139         private static function getItemFields()
 140         {
 141                 $definition = DBStructure::definition('', false);
 142
 143                 $postfields = [];
 144                 foreach (self::TABLES as $table) {
 145                         $postfields[$table] = array_keys($definition[$table]['fields']);
 146                 }
 147
 148                 return $postfields;
 149         }
 150
 151         public static function isLegacyMode()
 152         {
 153                 if (is_null(self::$legacy_mode)) {
 154                         self::$legacy_mode = (DI::config()->get("system", "post_update_version") < 1279);
 155                 }
 156
 157                 return self::$legacy_mode;
 158         }
 159
 160         /**
 161          * Set the pinned state of an item
 162          *
 163          * @param integer $iid    Item ID
 164          * @param integer $uid    User ID
 165          * @param boolean $pinned Pinned state
 166          */
 167         public static function setPinned(int $iid, int $uid, bool $pinned)
 168         {
 169                 DBA::update('user-item', ['pinned' => $pinned], ['iid' => $iid, 'uid' => $uid], true);
 170         }
 171
 172         /**
 173          * Get the pinned state
 174          *
 175          * @param integer $iid Item ID
 176          * @param integer $uid User ID
 177          *
 178          * @return boolean pinned state
 179          */
 180         public static function getPinned(int $iid, int $uid)
 181         {
 182                 $useritem = DBA::selectFirst('user-item', ['pinned'], ['iid' => $iid, 'uid' => $uid]);
 183                 if (!DBA::isResult($useritem)) {
 184                         return false;
 185                 }
 186                 return (bool)$useritem['pinned'];
 187         }
 188
 189         /**
 190          * Select pinned rows from the item table for a given user
 191          *
 192          * @param integer $uid       User ID
 193          * @param array   $selected  Array of selected fields, empty for all
 194          * @param array   $condition Array of fields for condition
 195          * @param array   $params    Array of several parameters
 196          *
 197          * @return boolean|object
 198          * @throws \Exception
 199          */
 200         public static function selectPinned(int $uid, array $selected = [], array $condition = [], $params = [])
 201         {
 202                 $useritems = DBA::select('user-item', ['iid'], ['uid' => $uid, 'pinned' => true]);
 203                 if (!DBA::isResult($useritems)) {
 204                         return $useritems;
 205                 }
 206
 207                 $pinned = [];
 208                 while ($useritem = DBA::fetch($useritems)) {
 209                         $pinned[] = $useritem['iid'];
 210                 }
 211                 DBA::close($useritems);
 212
 213                 if (empty($pinned)) {
 214                         return [];
 215                 }
 216
 217                 $condition = DBA::mergeConditions(['iid' => $pinned], $condition);
 218
 219                 return self::selectThreadForUser($uid, $selected, $condition, $params);
 220         }
 221
 222         /**
 223          * Fetch a single item row
 224          *
 225          * @param mixed $stmt statement object
 226          * @return array|false current row or false
 227          * @throws \Exception
 228          */
 229         public static function fetch($stmt)
 230         {
 231                 $row = DBA::fetch($stmt);
 232
 233                 if (!is_array($row)) {
 234                         return $row;
 235                 }
 236
 237                 $row = DBA::castFields('item', $row);
 238
 239                 // ---------------------- Transform item structure data ----------------------
 240
 241                 // We prefer the data from the user's contact over the public one
 242                 if (!empty($row['author-link']) && !empty($row['contact-link']) &&
 243                         ($row['author-link'] == $row['contact-link'])) {
 244                         if (isset($row['author-avatar']) && !empty($row['contact-avatar'])) {
 245                                 $row['author-avatar'] = $row['contact-avatar'];
 246                         }
 247                         if (isset($row['author-name']) && !empty($row['contact-name'])) {
 248                                 $row['author-name'] = $row['contact-name'];
 249                         }
 250                 }
 251
 252                 if (!empty($row['owner-link']) && !empty($row['contact-link']) &&
 253                         ($row['owner-link'] == $row['contact-link'])) {
 254                         if (isset($row['owner-avatar']) && !empty($row['contact-avatar'])) {
 255                                 $row['owner-avatar'] = $row['contact-avatar'];
 256                         }
 257                         if (isset($row['owner-name']) && !empty($row['contact-name'])) {
 258                                 $row['owner-name'] = $row['contact-name'];
 259                         }
 260                 }
 261
 262                 // We can always comment on posts from these networks
 263                 if (array_key_exists('writable', $row) &&
 264                         in_array($row['internal-network'], Protocol::FEDERATED)) {
 265                         $row['writable'] = true;
 266                 }
 267
 268                 // ---------------------- Transform item content data ----------------------
 269
 270                 // Fetch data from the item-content table whenever there is content there
 271                 if (self::isLegacyMode()) {
 272                         $legacy_fields = array_merge(Post\DeliveryData::LEGACY_FIELD_LIST, self::MIXED_CONTENT_FIELDLIST);
 273                         foreach ($legacy_fields as $field) {
 274                                 if (empty($row[$field]) && !empty($row['internal-item-' . $field])) {
 275                                         $row[$field] = $row['internal-item-' . $field];
 276                                 }
 277                                 unset($row['internal-item-' . $field]);
 278                         }
 279                 }
 280
 281                 if (array_key_exists('verb', $row)) {
 282                         if (!is_null($row['internal-verb'])) {
 283                                 $row['verb'] = $row['internal-verb'];
 284                         }
 285
 286                         if (in_array($row['verb'], self::ACTIVITIES)) {
 287                                 if (array_key_exists('title', $row)) {
 288                                         $row['title'] = '';
 289                                 }
 290                                 if (array_key_exists('body', $row)) {
 291                                         $row['body'] = $row['verb'];
 292                                 }
 293                                 if (array_key_exists('object', $row)) {
 294                                         $row['object'] = '';
 295                                 }
 296                                 if (array_key_exists('object-type', $row)) {
 297                                         $row['object-type'] = Activity\ObjectType::NOTE;
 298                                 }
 299                         } elseif (in_array($row['verb'], ['', Activity::POST, Activity::SHARE])) {
 300                                 // Posts don't have a target - but having tags or files.
 301                                 if (array_key_exists('target', $row)) {
 302                                         $row['target'] = '';
 303                                 }
 304                         }
 305                 }
 306
 307                 if (array_key_exists('vid', $row) && is_null($row['vid']) && !empty($row['verb'])) {
 308                         $row['vid'] = Verb::getID($row['verb']);
 309                 }
 310
 311                 if (!array_key_exists('verb', $row) || in_array($row['verb'], ['', Activity::POST, Activity::SHARE])) {
 312                         // Build the file string out of the term entries
 313                         if (array_key_exists('file', $row) && empty($row['file'])) {
 314                                 $row['file'] = Post\Category::getTextByURIId($row['internal-uri-id'], $row['internal-uid']);
 315                         }
 316                 }
 317
 318                 if ($row['internal-psid'] == RepPermissionSet::PUBLIC) {
 319                         if (array_key_exists('allow_cid', $row)) {
 320                                 $row['allow_cid'] = '';
 321                         }
 322                         if (array_key_exists('allow_gid', $row)) {
 323                                 $row['allow_gid'] = '';
 324                         }
 325                         if (array_key_exists('deny_cid', $row)) {
 326                                 $row['deny_cid'] = '';
 327                         }
 328                         if (array_key_exists('deny_gid', $row)) {
 329                                 $row['deny_gid'] = '';
 330                         }
 331                 }
 332
 333                 if (array_key_exists('ignored', $row) && array_key_exists('internal-user-ignored', $row) && !is_null($row['internal-user-ignored'])) {
 334                         $row['ignored'] = $row['internal-user-ignored'];
 335                 }
 336
 337                 // Remove internal fields
 338                 unset($row['internal-network']);
 339                 unset($row['internal-uri-id']);
 340                 unset($row['internal-uid']);
 341                 unset($row['internal-psid']);
 342                 unset($row['internal-verb']);
 343                 unset($row['internal-user-ignored']);
 344                 unset($row['interaction']);
 345
 346                 return $row;
 347         }
 348
 349         /**
 350          * Fills an array with data from an item query
 351          *
 352          * @param object $stmt statement object
 353          * @param bool   $do_close
 354          * @return array Data array
 355          */
 356         public static function inArray($stmt, $do_close = true) {
 357                 if (is_bool($stmt)) {
 358                         return $stmt;
 359                 }
 360
 361                 $data = [];
 362                 while ($row = self::fetch($stmt)) {
 363                         $data[] = $row;
 364                 }
 365                 if ($do_close) {
 366                         DBA::close($stmt);
 367                 }
 368                 return $data;
 369         }
 370
 371         /**
 372          * Check if item data exists
 373          *
 374          * @param array $condition array of fields for condition
 375          *
 376          * @return boolean Are there rows for that condition?
 377          * @throws \Exception
 378          */
 379         public static function exists($condition) {
 380                 $stmt = self::select(['id'], $condition, ['limit' => 1]);
 381
 382                 if (is_bool($stmt)) {
 383                         $retval = $stmt;
 384                 } else {
 385                         $retval = (DBA::numRows($stmt) > 0);
 386                 }
 387
 388                 DBA::close($stmt);
 389
 390                 return $retval;
 391         }
 392
 393         /**
 394          * Retrieve a single record from the item table for a given user and returns it in an associative array
 395          *
 396          * @param integer $uid User ID
 397          * @param array   $selected
 398          * @param array   $condition
 399          * @param array   $params
 400          * @return bool|array
 401          * @throws \Exception
 402          * @see   DBA::select
 403          */
 404         public static function selectFirstForUser($uid, array $selected = [], array $condition = [], $params = [])
 405         {
 406                 $params['uid'] = $uid;
 407
 408                 if (empty($selected)) {
 409                         $selected = Item::DISPLAY_FIELDLIST;
 410                 }
 411
 412                 return self::selectFirst($selected, $condition, $params);
 413         }
 414
 415         /**
 416          * Select rows from the item table for a given user
 417          *
 418          * @param integer $uid       User ID
 419          * @param array   $selected  Array of selected fields, empty for all
 420          * @param array   $condition Array of fields for condition
 421          * @param array   $params    Array of several parameters
 422          *
 423          * @return boolean|object
 424          * @throws \Exception
 425          */
 426         public static function selectForUser($uid, array $selected = [], array $condition = [], $params = [])
 427         {
 428                 $params['uid'] = $uid;
 429
 430                 if (empty($selected)) {
 431                         $selected = Item::DISPLAY_FIELDLIST;
 432                 }
 433
 434                 return self::select($selected, $condition, $params);
 435         }
 436
 437         /**
 438          * Retrieve a single record from the item table and returns it in an associative array
 439          *
 440          * @param array $fields
 441          * @param array $condition
 442          * @param array $params
 443          * @return bool|array
 444          * @throws \Exception
 445          * @see   DBA::select
 446          */
 447         public static function selectFirst(array $fields = [], array $condition = [], $params = [])
 448         {
 449                 $params['limit'] = 1;
 450
 451                 $result = self::select($fields, $condition, $params);
 452
 453                 if (is_bool($result)) {
 454                         return $result;
 455                 } else {
 456                         $row = self::fetch($result);
 457                         DBA::close($result);
 458                         return $row;
 459                 }
 460         }
 461
 462         /**
 463          * Select rows from the item table and returns them as an array
 464          *
 465          * @param array $selected  Array of selected fields, empty for all
 466          * @param array $condition Array of fields for condition
 467          * @param array $params    Array of several parameters
 468          *
 469          * @return array
 470          * @throws \Exception
 471          */
 472         public static function selectToArray(array $fields = [], array $condition = [], $params = [])
 473         {
 474                 $result = self::select($fields, $condition, $params);
 475
 476                 if (is_bool($result)) {
 477                         return [];
 478                 }
 479
 480                 $data = [];
 481                 while ($row = self::fetch($result)) {
 482                         $data[] = $row;
 483                 }
 484                 DBA::close($result);
 485
 486                 return $data;
 487         }
 488
 489         /**
 490          * Select rows from the item table
 491          *
 492          * @param array $selected  Array of selected fields, empty for all
 493          * @param array $condition Array of fields for condition
 494          * @param array $params    Array of several parameters
 495          *
 496          * @return boolean|object
 497          * @throws \Exception
 498          */
 499         public static function select(array $selected = [], array $condition = [], $params = [])
 500         {
 501                 $uid = 0;
 502                 $usermode = false;
 503
 504                 if (isset($params['uid'])) {
 505                         $uid = $params['uid'];
 506                         $usermode = true;
 507                 }
 508
 509                 $fields = self::fieldlist($usermode);
 510
 511                 $select_fields = self::constructSelectFields($fields, $selected);
 512
 513                 $condition_string = DBA::buildCondition($condition);
 514
 515                 $condition_string = self::addTablesToFields($condition_string, $fields);
 516
 517                 if ($usermode) {
 518                         $condition_string = $condition_string . ' AND ' . self::condition(false);
 519                 }
 520
 521                 $param_string = self::addTablesToFields(DBA::buildParameter($params), $fields);
 522
 523                 $table = "`item` " . self::constructJoins($uid, $select_fields . $condition_string . $param_string, false, $usermode);
 524
 525                 $sql = "SELECT " . $select_fields . " FROM " . $table . $condition_string . $param_string;
 526
 527                 return DBA::p($sql, $condition);
 528         }
 529
 530         /**
 531          * Select rows from the starting post in the item table
 532          *
 533          * @param integer $uid       User ID
 534          * @param array   $selected
 535          * @param array   $condition Array of fields for condition
 536          * @param array   $params    Array of several parameters
 537          *
 538          * @return boolean|object
 539          * @throws \Exception
 540          */
 541         public static function selectThreadForUser($uid, array $selected = [], array $condition = [], $params = [])
 542         {
 543                 $params['uid'] = $uid;
 544
 545                 if (empty($selected)) {
 546                         $selected = Item::DISPLAY_FIELDLIST;
 547                 }
 548
 549                 return self::selectThread($selected, $condition, $params);
 550         }
 551
 552         /**
 553          * Retrieve a single record from the starting post in the item table and returns it in an associative array
 554          *
 555          * @param integer $uid User ID
 556          * @param array   $selected
 557          * @param array   $condition
 558          * @param array   $params
 559          * @return bool|array
 560          * @throws \Exception
 561          * @see   DBA::select
 562          */
 563         public static function selectFirstThreadForUser($uid, array $selected = [], array $condition = [], $params = [])
 564         {
 565                 $params['uid'] = $uid;
 566
 567                 if (empty($selected)) {
 568                         $selected = Item::DISPLAY_FIELDLIST;
 569                 }
 570
 571                 return self::selectFirstThread($selected, $condition, $params);
 572         }
 573
 574         /**
 575          * Retrieve a single record from the starting post in the item table and returns it in an associative array
 576          *
 577          * @param array $fields
 578          * @param array $condition
 579          * @param array $params
 580          * @return bool|array
 581          * @throws \Exception
 582          * @see   DBA::select
 583          */
 584         public static function selectFirstThread(array $fields = [], array $condition = [], $params = [])
 585         {
 586                 $params['limit'] = 1;
 587                 $result = self::selectThread($fields, $condition, $params);
 588
 589                 if (is_bool($result)) {
 590                         return $result;
 591                 } else {
 592                         $row = self::fetch($result);
 593                         DBA::close($result);
 594                         return $row;
 595                 }
 596         }
 597
 598         /**
 599          * Select rows from the starting post in the item table
 600          *
 601          * @param array $selected  Array of selected fields, empty for all
 602          * @param array $condition Array of fields for condition
 603          * @param array $params    Array of several parameters
 604          *
 605          * @return boolean|object
 606          * @throws \Exception
 607          */
 608         public static function selectThread(array $selected = [], array $condition = [], $params = [])
 609         {
 610                 $uid = 0;
 611                 $usermode = false;
 612
 613                 if (isset($params['uid'])) {
 614                         $uid = $params['uid'];
 615                         $usermode = true;
 616                 }
 617
 618                 $fields = self::fieldlist($usermode);
 619
 620                 $fields['thread'] = ['mention', 'ignored', 'iid'];
 621
 622                 $threadfields = ['thread' => ['iid', 'uid', 'contact-id', 'owner-id', 'author-id',
 623                         'created', 'edited', 'commented', 'received', 'changed', 'wall', 'private',
 624                         'pubmail', 'moderated', 'visible', 'starred', 'ignored', 'post-type',
 625                         'unseen', 'deleted', 'origin', 'forum_mode', 'mention', 'network']];
 626
 627                 $select_fields = self::constructSelectFields($fields, $selected);
 628
 629                 $condition_string = DBA::buildCondition($condition);
 630
 631                 $condition_string = self::addTablesToFields($condition_string, $threadfields);
 632                 $condition_string = self::addTablesToFields($condition_string, $fields);
 633
 634                 if ($usermode) {
 635                         $condition_string = $condition_string . ' AND ' . self::condition(true);
 636                 }
 637
 638                 $param_string = DBA::buildParameter($params);
 639                 $param_string = self::addTablesToFields($param_string, $threadfields);
 640                 $param_string = self::addTablesToFields($param_string, $fields);
 641
 642                 $table = "`thread` " . self::constructJoins($uid, $select_fields . $condition_string . $param_string, true, $usermode);
 643
 644                 $sql = "SELECT " . $select_fields . " FROM " . $table . $condition_string . $param_string;
 645
 646                 return DBA::p($sql, $condition);
 647         }
 648
 649         /**
 650          * Returns a list of fields that are associated with the item table
 651          *
 652          * @param $usermode
 653          * @return array field list
 654          */
 655         private static function fieldlist($usermode)
 656         {
 657                 $fields = [];
 658
 659                 $fields['item'] = ['id', 'uid', 'parent', 'uri', 'parent-uri', 'thr-parent',
 660                         'guid', 'uri-id', 'parent-uri-id', 'thr-parent-id', 'vid', 'causer-id',
 661                         'contact-id', 'owner-id', 'author-id', 'type', 'wall', 'gravity', 'extid',
 662                         'created', 'edited', 'commented', 'received', 'changed', 'psid',
 663                         'resource-id', 'event-id', 'post-type', 'file',
 664                         'private', 'pubmail', 'moderated', 'visible', 'starred', 'bookmark',
 665                         'unseen', 'deleted', 'origin', 'forum_mode', 'mention', 'global',
 666                         'id' => 'item_id', 'network', 'icid',
 667                         'uri-id' => 'internal-uri-id', 'uid' => 'internal-uid',
 668                         'network' => 'internal-network', 'psid' => 'internal-psid'];
 669
 670                 if ($usermode) {
 671                         $fields['user-item'] = ['pinned', 'notification-type', 'ignored' => 'internal-user-ignored'];
 672                 }
 673
 674                 $fields['item-content'] = array_merge(self::CONTENT_FIELDLIST, self::MIXED_CONTENT_FIELDLIST);
 675
 676                 $fields['post-delivery-data'] = array_merge(Post\DeliveryData::LEGACY_FIELD_LIST, Post\DeliveryData::FIELD_LIST);
 677
 678                 $fields['verb'] = ['name' => 'internal-verb'];
 679
 680                 $fields['permissionset'] = ['allow_cid', 'allow_gid', 'deny_cid', 'deny_gid'];
 681
 682                 $fields['author'] = ['url' => 'author-link', 'name' => 'author-name', 'addr' => 'author-addr',
 683                         'thumb' => 'author-avatar', 'nick' => 'author-nick', 'network' => 'author-network'];
 684
 685                 $fields['owner'] = ['url' => 'owner-link', 'name' => 'owner-name', 'addr' => 'owner-addr',
 686                         'thumb' => 'owner-avatar', 'nick' => 'owner-nick', 'network' => 'owner-network'];
 687
 688                 $fields['causer'] = ['url' => 'causer-link', 'name' => 'causer-name', 'addr' => 'causer-addr',
 689                         'thumb' => 'causer-avatar', 'nick' => 'causer-nick', 'network' => 'causer-network',
 690                         'contact-type' => 'causer-contact-type'];
 691
 692                 $fields['contact'] = ['url' => 'contact-link', 'name' => 'contact-name', 'thumb' => 'contact-avatar',
 693                         'writable', 'self', 'id' => 'cid', 'alias', 'uid' => 'contact-uid',
 694                         'photo', 'name-date', 'uri-date', 'avatar-date', 'thumb', 'dfrn-id'];
 695
 696                 $fields['parent-item'] = ['guid' => 'parent-guid', 'network' => 'parent-network', 'author-id' => 'parent-author-id'];
 697
 698                 $fields['parent-item-author'] = ['url' => 'parent-author-link', 'name' => 'parent-author-name',
 699                         'network' => 'parent-author-network'];
 700
 701                 $fields['event'] = ['created' => 'event-created', 'edited' => 'event-edited',
 702                         'start' => 'event-start','finish' => 'event-finish',
 703                         'summary' => 'event-summary','desc' => 'event-desc',
 704                         'location' => 'event-location', 'type' => 'event-type',
 705                         'nofinish' => 'event-nofinish','adjust' => 'event-adjust',
 706                         'ignore' => 'event-ignore', 'id' => 'event-id'];
 707
 708                 $fields['diaspora-interaction'] = ['interaction', 'interaction' => 'signed_text'];
 709
 710                 return $fields;
 711         }
 712
 713         /**
 714          * Returns SQL condition for the "select" functions
 715          *
 716          * @param boolean $thread_mode Called for the items (false) or for the threads (true)
 717          *
 718          * @return string SQL condition
 719          */
 720         private static function condition($thread_mode)
 721         {
 722                 if ($thread_mode) {
 723                         $master_table = "`thread`";
 724                 } else {
 725                         $master_table = "`item`";
 726                 }
 727                 return sprintf("$master_table.`visible` AND NOT $master_table.`deleted` AND NOT $master_table.`moderated`
 728                         AND (`user-item`.`hidden` IS NULL OR NOT `user-item`.`hidden`)
 729                         AND (`user-author`.`blocked` IS NULL OR NOT `user-author`.`blocked`)
 730                         AND (`user-author`.`ignored` IS NULL OR NOT `user-author`.`ignored` OR `item`.`gravity` != %d)
 731                         AND (`user-owner`.`blocked` IS NULL OR NOT `user-owner`.`blocked`)
 732                         AND (`user-owner`.`ignored` IS NULL OR NOT `user-owner`.`ignored` OR `item`.`gravity` != %d) ",
 733                         GRAVITY_PARENT, GRAVITY_PARENT);
 734         }
 735
 736         /**
 737          * Returns all needed "JOIN" commands for the "select" functions
 738          *
 739          * @param integer $uid          User ID
 740          * @param string  $sql_commands The parts of the built SQL commands in the "select" functions
 741          * @param boolean $thread_mode  Called for the items (false) or for the threads (true)
 742          *
 743          * @param         $user_mode
 744          * @return string The SQL joins for the "select" functions
 745          */
 746         private static function constructJoins($uid, $sql_commands, $thread_mode, $user_mode)
 747         {
 748                 if ($thread_mode) {
 749                         $master_table = "`thread`";
 750                         $master_table_key = "`thread`.`iid`";
 751                         $joins = "STRAIGHT_JOIN `item` ON `item`.`id` = `thread`.`iid` ";
 752                 } else {
 753                         $master_table = "`item`";
 754                         $master_table_key = "`item`.`id`";
 755                         $joins = '';
 756                 }
 757
 758                 if ($user_mode) {
 759                         $joins .= sprintf("STRAIGHT_JOIN `contact` ON `contact`.`id` = $master_table.`contact-id`
 760                                 AND NOT `contact`.`blocked`
 761                                 AND ((NOT `contact`.`readonly` AND NOT `contact`.`pending` AND (`contact`.`rel` IN (%s, %s)))
 762                                 OR `contact`.`self` OR `item`.`gravity` != %d OR `contact`.`uid` = 0)
 763                                 STRAIGHT_JOIN `contact` AS `author` ON `author`.`id` = $master_table.`author-id` AND NOT `author`.`blocked`
 764                                 STRAIGHT_JOIN `contact` AS `owner` ON `owner`.`id` = $master_table.`owner-id` AND NOT `owner`.`blocked`
 765                                 LEFT JOIN `user-item` ON `user-item`.`iid` = $master_table_key AND `user-item`.`uid` = %d
 766                                 LEFT JOIN `user-contact` AS `user-author` ON `user-author`.`cid` = $master_table.`author-id` AND `user-author`.`uid` = %d
 767                                 LEFT JOIN `user-contact` AS `user-owner` ON `user-owner`.`cid` = $master_table.`owner-id` AND `user-owner`.`uid` = %d",
 768                                 Contact::SHARING, Contact::FRIEND, GRAVITY_PARENT, intval($uid), intval($uid), intval($uid));
 769                 } else {
 770                         if (strpos($sql_commands, "`contact`.") !== false) {
 771                                 $joins .= "LEFT JOIN `contact` ON `contact`.`id` = $master_table.`contact-id`";
 772                         }
 773                         if (strpos($sql_commands, "`author`.") !== false) {
 774                                 $joins .= " LEFT JOIN `contact` AS `author` ON `author`.`id` = $master_table.`author-id`";
 775                         }
 776                         if (strpos($sql_commands, "`owner`.") !== false) {
 777                                 $joins .= " LEFT JOIN `contact` AS `owner` ON `owner`.`id` = $master_table.`owner-id`";
 778                         }
 779                 }
 780                 if (strpos($sql_commands, "`causer`.") !== false) {
 781                         $joins .= " LEFT JOIN `contact` AS `causer` ON `causer`.`id` = `item`.`causer-id`";
 782                 }
 783
 784                 if (strpos($sql_commands, "`group_member`.") !== false) {
 785                         $joins .= " STRAIGHT_JOIN `group_member` ON `group_member`.`contact-id` = $master_table.`contact-id`";
 786                 }
 787
 788                 if (strpos($sql_commands, "`user`.") !== false) {
 789                         $joins .= " STRAIGHT_JOIN `user` ON `user`.`uid` = $master_table.`uid`";
 790                 }
 791
 792                 if (strpos($sql_commands, "`event`.") !== false) {
 793                         $joins .= " LEFT JOIN `event` ON `event-id` = `event`.`id`";
 794                 }
 795
 796                 if (strpos($sql_commands, "`diaspora-interaction`.") !== false) {
 797                         $joins .= " LEFT JOIN `diaspora-interaction` ON `diaspora-interaction`.`uri-id` = `item`.`uri-id`";
 798                 }
 799
 800                 if (strpos($sql_commands, "`item-content`.") !== false) {
 801                         $joins .= " LEFT JOIN `item-content` ON `item-content`.`uri-id` = `item`.`uri-id`";
 802                 }
 803
 804                 if (strpos($sql_commands, "`post-delivery-data`.") !== false) {
 805                         $joins .= " LEFT JOIN `post-delivery-data` ON `post-delivery-data`.`uri-id` = `item`.`uri-id` AND `item`.`origin`";
 806                 }
 807
 808                 if (strpos($sql_commands, "`verb`.") !== false) {
 809                         $joins .= " LEFT JOIN `verb` ON `verb`.`id` = `item`.`vid`";
 810                 }
 811
 812                 if (strpos($sql_commands, "`permissionset`.") !== false) {
 813                         $joins .= " LEFT JOIN `permissionset` ON `permissionset`.`id` = `item`.`psid`";
 814                 }
 815
 816                 if ((strpos($sql_commands, "`parent-item`.") !== false) || (strpos($sql_commands, "`parent-item-author`.") !== false)) {
 817                         $joins .= " STRAIGHT_JOIN `item` AS `parent-item` ON `parent-item`.`id` = `item`.`parent`";
 818
 819                         if (strpos($sql_commands, "`parent-item-author`.") !== false) {
 820                                 $joins .= " STRAIGHT_JOIN `contact` AS `parent-item-author` ON `parent-item-author`.`id` = `parent-item`.`author-id`";
 821                         }
 822                 }
 823
 824                 return $joins;
 825         }
 826
 827         /**
 828          * Add the field list for the "select" functions
 829          *
 830          * @param array $fields The field definition array
 831          * @param array $selected The array with the selected fields from the "select" functions
 832          *
 833          * @return string The field list
 834          */
 835         private static function constructSelectFields(array $fields, array $selected)
 836         {
 837                 if (!empty($selected)) {
 838                         $selected = array_merge($selected, ['internal-uri-id', 'internal-uid', 'internal-psid', 'internal-network']);
 839                 }
 840
 841                 if (in_array('verb', $selected)) {
 842                         $selected = array_merge($selected, ['internal-verb']);
 843                 }
 844
 845                 if (in_array('ignored', $selected)) {
 846                         $selected[] = 'internal-user-ignored';
 847                 }
 848
 849                 $legacy_fields = array_merge(Post\DeliveryData::LEGACY_FIELD_LIST, self::MIXED_CONTENT_FIELDLIST);
 850
 851                 $selection = [];
 852                 foreach ($fields as $table => $table_fields) {
 853                         foreach ($table_fields as $field => $select) {
 854                                 if (empty($selected) || in_array($select, $selected)) {
 855                                         if (self::isLegacyMode() && in_array($select, $legacy_fields)) {
 856                                                 $selection[] = "`item`.`".$select."` AS `internal-item-" . $select . "`";
 857                                         }
 858                                         if (is_int($field)) {
 859                                                 $selection[] = "`" . $table . "`.`" . $select . "`";
 860                                         } else {
 861                                                 $selection[] = "`" . $table . "`.`" . $field . "` AS `" . $select . "`";
 862                                         }
 863                                 }
 864                         }
 865                 }
 866                 return implode(", ", $selection);
 867         }
 868
 869         /**
 870          * add table definition to fields in an SQL query
 871          *
 872          * @param string $query SQL query
 873          * @param array $fields The field definition array
 874          *
 875          * @return string the changed SQL query
 876          */
 877         private static function addTablesToFields($query, $fields)
 878         {
 879                 foreach ($fields as $table => $table_fields) {
 880                         foreach ($table_fields as $alias => $field) {
 881                                 if (is_int($alias)) {
 882                                         $replace_field = $field;
 883                                 } else {
 884                                         $replace_field = $alias;
 885                                 }
 886
 887                                 $search = "/([^\.])`" . $field . "`/i";
 888                                 $replace = "$1`" . $table . "`.`" . $replace_field . "`";
 889                                 $query = preg_replace($search, $replace, $query);
 890                         }
 891                 }
 892                 return $query;
 893         }
 894
 895         /**
 896          * Update existing item entries
 897          *
 898          * @param array $fields    The fields that are to be changed
 899          * @param array $condition The condition for finding the item entries
 900          *
 901          * In the future we may have to change permissions as well.
 902          * Then we had to add the user id as third parameter.
 903          *
 904          * A return value of "0" doesn't mean an error - but that 0 rows had been changed.
 905          *
 906          * @return integer|boolean number of affected rows - or "false" if there was an error
 907          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 908          */
 909         public static function update(array $fields, array $condition)
 910         {
 911                 if (empty($condition) || empty($fields)) {
 912                         return false;
 913                 }
 914
 915                 $data_fields = $fields;
 916
 917                 // To ensure the data integrity we do it in an transaction
 918                 DBA::transaction();
 919
 920                 // We cannot simply expand the condition to check for origin entries
 921                 // The condition needn't to be a simple array but could be a complex condition.
 922                 // And we have to execute this query before the update to ensure to fetch the same data.
 923                 $items = DBA::select('item', ['id', 'origin', 'uri', 'uri-id', 'icid', 'uid', 'file'], $condition);
 924
 925                 $content_fields = [];
 926                 foreach (array_merge(self::CONTENT_FIELDLIST, self::MIXED_CONTENT_FIELDLIST) as $field) {
 927                         if (isset($fields[$field])) {
 928                                 $content_fields[$field] = $fields[$field];
 929                                 if (in_array($field, self::CONTENT_FIELDLIST) || !self::isLegacyMode()) {
 930                                         unset($fields[$field]);
 931                                 } else {
 932                                         $fields[$field] = null;
 933                                 }
 934                         }
 935                 }
 936
 937                 $delivery_data = Post\DeliveryData::extractFields($fields);
 938
 939                 $clear_fields = ['bookmark', 'type', 'author-name', 'author-avatar', 'author-link', 'owner-name', 'owner-avatar', 'owner-link', 'postopts', 'inform'];
 940                 foreach ($clear_fields as $field) {
 941                         if (array_key_exists($field, $fields)) {
 942                                 $fields[$field] = null;
 943                         }
 944                 }
 945
 946                 if (array_key_exists('file', $fields)) {
 947                         $files = $fields['file'];
 948                         $fields['file'] = null;
 949                 } else {
 950                         $files = null;
 951                 }
 952
 953                 if (!empty($content_fields['verb'])) {
 954                         $fields['vid'] = Verb::getID($content_fields['verb']);
 955                 }
 956
 957                 if (!empty($fields)) {
 958                         $success = DBA::update('item', $fields, $condition);
 959
 960                         if (!$success) {
 961                                 DBA::close($items);
 962                                 DBA::rollback();
 963                                 return false;
 964                         }
 965                 }
 966
 967                 // When there is no content for the "old" item table, this will count the fetched items
 968                 $rows = DBA::affectedRows();
 969
 970                 $notify_items = [];
 971
 972                 while ($item = DBA::fetch($items)) {
 973                         Post\User::update($item['uri-id'], $item['uid'], $data_fields);
 974
 975                         if (empty($content_fields['verb']) || !in_array($content_fields['verb'], self::ACTIVITIES)) {
 976                                 if (!empty($content_fields['body'])) {
 977                                         $content_fields['raw-body'] = trim($content_fields['raw-body'] ?? $content_fields['body']);
 978
 979                                         // Remove all media attachments from the body and store them in the post-media table
 980                                         $content_fields['raw-body'] = Post\Media::insertFromBody($item['uri-id'], $content_fields['raw-body']);
 981                                         $content_fields['raw-body'] = self::setHashtags($content_fields['raw-body']);
 982                                 }
 983
 984                                 self::updateContent($content_fields, ['uri-id' => $item['uri-id']]);
 985
 986                                 if (empty($item['icid'])) {
 987                                         $item_content = DBA::selectFirst('item-content', [], ['uri-id' => $item['uri-id']]);
 988                                         if (DBA::isResult($item_content)) {
 989                                                 $item_fields = ['icid' => $item_content['id']];
 990                                                 // Clear all fields in the item table that have a content in the item-content table
 991                                                 if (self::isLegacyMode()) {
 992                                                         foreach ($item_content as $field => $content) {
 993                                                                 if (in_array($field, self::MIXED_CONTENT_FIELDLIST) && !empty($content)) {
 994                                                                         $item_fields[$field] = null;
 995                                                                 }
 996                                                         }
 997                                                 }
 998                                                 DBA::update('item', $item_fields, ['id' => $item['id']]);
 999                                         }
1000                                 }
1001                         }
1002
1003                         if (!is_null($files)) {
1004                                 Post\Category::storeTextByURIId($item['uri-id'], $item['uid'], $files);
1005                                 if (!empty($item['file'])) {
1006                                         DBA::update('item', ['file' => ''], ['id' => $item['id']]);
1007                                 }
1008                         }
1009
1010                         if (!empty($fields['attach'])) {
1011                                 Post\Media::insertFromAttachment($item['uri-id'], $fields['attach']);
1012                         }
1013
1014                         Post\DeliveryData::update($item['uri-id'], $delivery_data);
1015
1016                         self::updateThread($item['id']);
1017
1018                         // We only need to notfiy others when it is an original entry from us.
1019                         // Only call the notifier when the item has some content relevant change.
1020                         if ($item['origin'] && in_array('edited', array_keys($fields))) {
1021                                 $notify_items[] = $item['id'];
1022                         }
1023                 }
1024
1025                 DBA::close($items);
1026                 DBA::commit();
1027
1028                 foreach ($notify_items as $notify_item) {
1029                         Worker::add(PRIORITY_HIGH, "Notifier", Delivery::POST, $notify_item);
1030                 }
1031
1032                 return $rows;
1033         }
1034
1035         /**
1036          * Delete an item and notify others about it - if it was ours
1037          *
1038          * @param array   $condition The condition for finding the item entries
1039          * @param integer $priority  Priority for the notification
1040          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1041          */
1042         public static function markForDeletion($condition, $priority = PRIORITY_HIGH)
1043         {
1044                 $items = self::select(['id'], $condition);
1045                 while ($item = self::fetch($items)) {
1046                         self::markForDeletionById($item['id'], $priority);
1047                 }
1048                 DBA::close($items);
1049         }
1050
1051         /**
1052          * Delete an item for an user and notify others about it - if it was ours
1053          *
1054          * @param array   $condition The condition for finding the item entries
1055          * @param integer $uid       User who wants to delete this item
1056          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1057          */
1058         public static function deleteForUser($condition, $uid)
1059         {
1060                 if ($uid == 0) {
1061                         return;
1062                 }
1063
1064                 $items = self::select(['id', 'uid', 'uri-id'], $condition);
1065                 while ($item = self::fetch($items)) {
1066                         Post\User::update($item['uri-id'], $item['uid'], ['hidden' => true]);
1067
1068                         // "Deleting" global items just means hiding them
1069                         if ($item['uid'] == 0) {
1070                                 DBA::update('user-item', ['hidden' => true], ['iid' => $item['id'], 'uid' => $uid], true);
1071                         } elseif ($item['uid'] == $uid) {
1072                                 self::markForDeletionById($item['id'], PRIORITY_HIGH);
1073                         } else {
1074                                 Logger::log('Wrong ownership. Not deleting item ' . $item['id']);
1075                         }
1076                 }
1077                 DBA::close($items);
1078         }
1079
1080         /**
1081          * Mark an item for deletion, delete related data and notify others about it - if it was ours
1082          *
1083          * @param integer $item_id
1084          * @param integer $priority Priority for the notification
1085          *
1086          * @return boolean success
1087          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1088          */
1089         public static function markForDeletionById($item_id, $priority = PRIORITY_HIGH)
1090         {
1091                 Logger::info('Mark item for deletion by id', ['id' => $item_id, 'callstack' => System::callstack()]);
1092                 // locate item to be deleted
1093                 $fields = ['id', 'uri', 'uri-id', 'uid', 'parent', 'parent-uri', 'origin',
1094                         'deleted', 'file', 'resource-id', 'event-id',
1095                         'verb', 'object-type', 'object', 'target', 'contact-id',
1096                         'icid', 'psid', 'gravity'];
1097                 $item = self::selectFirst($fields, ['id' => $item_id]);
1098                 if (!DBA::isResult($item)) {
1099                         Logger::info('Item not found.', ['id' => $item_id]);
1100                         return false;
1101                 }
1102
1103                 if ($item['deleted']) {
1104                         Logger::info('Item has already been marked for deletion.', ['id' => $item_id]);
1105                         return false;
1106                 }
1107
1108                 $parent = self::selectFirst(['origin'], ['id' => $item['parent']]);
1109                 if (!DBA::isResult($parent)) {
1110                         $parent = ['origin' => false];
1111                 }
1112
1113                 // clean up categories and tags so they don't end up as orphans
1114
1115                 $matches = [];
1116                 $cnt = preg_match_all('/<(.*?)>/', $item['file'], $matches, PREG_SET_ORDER);
1117
1118                 if ($cnt) {
1119                         foreach ($matches as $mtch) {
1120                                 FileTag::unsaveFile($item['uid'], $item['id'], $mtch[1],true);
1121                         }
1122                 }
1123
1124                 $matches = [];
1125
1126                 $cnt = preg_match_all('/\[(.*?)\]/', $item['file'], $matches, PREG_SET_ORDER);
1127
1128                 if ($cnt) {
1129                         foreach ($matches as $mtch) {
1130                                 FileTag::unsaveFile($item['uid'], $item['id'], $mtch[1],false);
1131                         }
1132                 }
1133
1134                 /*
1135                  * If item is a link to a photo resource, nuke all the associated photos
1136                  * (visitors will not have photo resources)
1137                  * This only applies to photos uploaded from the photos page. Photos inserted into a post do not
1138                  * generate a resource-id and therefore aren't intimately linked to the item.
1139                  */
1140                 /// @TODO: this should first check if photo is used elsewhere
1141                 if (strlen($item['resource-id'])) {
1142                         Photo::delete(['resource-id' => $item['resource-id'], 'uid' => $item['uid']]);
1143                 }
1144
1145                 // If item is a link to an event, delete the event.
1146                 if (intval($item['event-id'])) {
1147                         Event::delete($item['event-id']);
1148                 }
1149
1150                 // If item has attachments, drop them
1151                 $attachments = Post\Media::getByURIId($item['uri-id'], [Post\Media::DOCUMENT]);
1152                 foreach($attachments as $attachment) {
1153                         if (preg_match("|attach/(\d+)|", $attachment['url'], $matches)) {
1154                                 Attach::delete(['id' => $matches[1], 'uid' => $item['uid']]);
1155                         }
1156                 }
1157
1158                 // Set the item to "deleted"
1159                 $item_fields = ['deleted' => true, 'edited' => DateTimeFormat::utcNow(), 'changed' => DateTimeFormat::utcNow()];
1160                 DBA::update('item', $item_fields, ['id' => $item['id']]);
1161
1162                 Post\Category::storeTextByURIId($item['uri-id'], $item['uid'], '');
1163                 self::deleteThread($item['id'], $item['parent-uri']);
1164
1165                 if (!self::exists(["`uri` = ? AND `uid` != 0 AND NOT `deleted`", $item['uri']])) {
1166                         self::markForDeletion(['uri' => $item['uri'], 'uid' => 0, 'deleted' => false], $priority);
1167                 }
1168
1169                 Post\DeliveryData::delete($item['uri-id']);
1170
1171                 // When the permission set will be used in photo and events as well,
1172                 // this query here needs to be extended.
1173                 // @todo Currently deactivated. We need the permission set in the deletion process.
1174                 // This is a reminder to add the removal somewhere else.
1175                 //if (!empty($item['psid']) && !self::exists(['psid' => $item['psid'], 'deleted' => false])) {
1176                 //      DBA::delete('permissionset', ['id' => $item['psid']], ['cascade' => false]);
1177                 //}
1178
1179                 // If it's the parent of a comment thread, kill all the kids
1180                 if ($item['gravity'] == GRAVITY_PARENT) {
1181                         self::markForDeletion(['parent' => $item['parent'], 'deleted' => false], $priority);
1182                 }
1183
1184                 // Is it our comment and/or our thread?
1185                 if (($item['origin'] || $parent['origin']) && ($item['uid'] != 0)) {
1186                         // When we delete the original post we will delete all existing copies on the server as well
1187                         self::markForDeletion(['uri' => $item['uri'], 'deleted' => false], $priority);
1188
1189                         // send the notification upstream/downstream
1190                         if ($priority) {
1191                                 Worker::add(['priority' => $priority, 'dont_fork' => true], "Notifier", Delivery::DELETION, intval($item['id']));
1192                         }
1193                 } elseif ($item['uid'] != 0) {
1194                         Post\User::update($item['uri-id'], $item['uid'], ['hidden' => true]);
1195
1196                         // When we delete just our local user copy of an item, we have to set a marker to hide it
1197                         $global_item = self::selectFirst(['id'], ['uri' => $item['uri'], 'uid' => 0, 'deleted' => false]);
1198                         if (DBA::isResult($global_item)) {
1199                                 DBA::update('user-item', ['hidden' => true], ['iid' => $global_item['id'], 'uid' => $item['uid']], true);
1200                         }
1201                 }
1202
1203                 Logger::info('Item has been marked for deletion.', ['id' => $item_id]);
1204
1205                 return true;
1206         }
1207
1208
1209         private static function guid($item, $notify)
1210         {
1211                 if (!empty($item['guid'])) {
1212                         return Strings::escapeTags(trim($item['guid']));
1213                 }
1214
1215                 if ($notify) {
1216                         // We have to avoid duplicates. So we create the GUID in form of a hash of the plink or uri.
1217                         // We add the hash of our own host because our host is the original creator of the post.
1218                         $prefix_host = DI::baseUrl()->getHostname();
1219                 } else {
1220                         $prefix_host = '';
1221
1222                         // We are only storing the post so we create a GUID from the original hostname.
1223                         if (!empty($item['author-link'])) {
1224                                 $parsed = parse_url($item['author-link']);
1225                                 if (!empty($parsed['host'])) {
1226                                         $prefix_host = $parsed['host'];
1227                                 }
1228                         }
1229
1230                         if (empty($prefix_host) && !empty($item['plink'])) {
1231                                 $parsed = parse_url($item['plink']);
1232                                 if (!empty($parsed['host'])) {
1233                                         $prefix_host = $parsed['host'];
1234                                 }
1235                         }
1236
1237                         if (empty($prefix_host) && !empty($item['uri'])) {
1238                                 $parsed = parse_url($item['uri']);
1239                                 if (!empty($parsed['host'])) {
1240                                         $prefix_host = $parsed['host'];
1241                                 }
1242                         }
1243
1244                         // Is it in the format data@host.tld? - Used for mail contacts
1245                         if (empty($prefix_host) && !empty($item['author-link']) && strstr($item['author-link'], '@')) {
1246                                 $mailparts = explode('@', $item['author-link']);
1247                                 $prefix_host = array_pop($mailparts);
1248                         }
1249                 }
1250
1251                 if (!empty($item['plink'])) {
1252                         $guid = self::guidFromUri($item['plink'], $prefix_host);
1253                 } elseif (!empty($item['uri'])) {
1254                         $guid = self::guidFromUri($item['uri'], $prefix_host);
1255                 } else {
1256                         $guid = System::createUUID(hash('crc32', $prefix_host));
1257                 }
1258
1259                 return $guid;
1260         }
1261
1262         private static function contactId($item)
1263         {
1264                 if (!empty($item['contact-id']) && DBA::exists('contact', ['self' => true, 'id' => $item['contact-id']])) {
1265                         return $item['contact-id'];
1266                 } elseif (($item['gravity'] == GRAVITY_PARENT) && !empty($item['uid']) && !empty($item['contact-id']) && Contact::isSharing($item['contact-id'], $item['uid'])) {
1267                         return $item['contact-id'];
1268                 } elseif (!empty($item['uid']) && !Contact::isSharing($item['author-id'], $item['uid'])) {
1269                         return $item['author-id'];
1270                 } elseif (!empty($item['contact-id'])) {
1271                         return $item['contact-id'];
1272                 } else {
1273                         $contact_id = Contact::getIdForURL($item['author-link'], $item['uid']);
1274                         if (!empty($contact_id)) {
1275                                 return $contact_id;
1276                         }
1277                 }
1278                 return $item['author-id'];
1279         }
1280
1281         // This function will finally cover most of the preparation functionality in mod/item.php
1282         public static function prepare(&$item)
1283         {
1284                 /*
1285                  * @TODO: Unused code triggering inspection errors
1286                  *
1287                 $data = BBCode::getAttachmentData($item['body']);
1288                 if ((preg_match_all("/\[bookmark\=([^\]]*)\](.*?)\[\/bookmark\]/ism", $item['body'], $match, PREG_SET_ORDER) || isset($data["type"]))
1289                         && ($posttype != Item::PT_PERSONAL_NOTE)) {
1290                         $posttype = Item::PT_PAGE;
1291                         $objecttype = ACTIVITY_OBJ_BOOKMARK;
1292                 }
1293                  */
1294         }
1295
1296         /**
1297          * Write an item array into a spool file to be inserted later.
1298          * This command is called whenever there are issues storing an item.
1299          *
1300          * @param array $item The item fields that are to be inserted
1301          * @throws \Exception
1302          */
1303         private static function spool($orig_item)
1304         {
1305                 // Now we store the data in the spool directory
1306                 // We use "microtime" to keep the arrival order and "mt_rand" to avoid duplicates
1307                 $file = 'item-' . round(microtime(true) * 10000) . '-' . mt_rand() . '.msg';
1308
1309                 $spoolpath = get_spoolpath();
1310                 if ($spoolpath != "") {
1311                         $spool = $spoolpath . '/' . $file;
1312
1313                         file_put_contents($spool, json_encode($orig_item));
1314                         Logger::warning("Item wasn't stored - Item was spooled into file", ['file' => $file]);
1315                 }
1316         }
1317
1318         /**
1319          * Check if the item array is a duplicate
1320          *
1321          * @param array $item
1322          * @return boolean is it a duplicate?
1323          */
1324         private static function isDuplicate(array $item)
1325         {
1326                 // Checking if there is already an item with the same guid
1327                 $condition = ['guid' => $item['guid'], 'network' => $item['network'], 'uid' => $item['uid']];
1328                 if (self::exists($condition)) {
1329                         Logger::notice('Found already existing item', [
1330                                 'guid' => $item['guid'],
1331                                 'uid' => $item['uid'],
1332                                 'network' => $item['network']
1333                         ]);
1334                         return true;
1335                 }
1336
1337                 $condition = ["`uri` = ? AND `network` IN (?, ?) AND `uid` = ?",
1338                         $item['uri'], $item['network'], Protocol::DFRN, $item['uid']];
1339                 if (self::exists($condition)) {
1340                         Logger::notice('duplicated item with the same uri found.', $item);
1341                         return true;
1342                 }
1343
1344                 // On Friendica and Diaspora the GUID is unique
1345                 if (in_array($item['network'], [Protocol::DFRN, Protocol::DIASPORA])) {
1346                         $condition = ['guid' => $item['guid'], 'uid' => $item['uid']];
1347                         if (self::exists($condition)) {
1348                                 Logger::notice('duplicated item with the same guid found.', $item);
1349                                 return true;
1350                         }
1351                 } elseif ($item['network'] == Protocol::OSTATUS) {
1352                         // Check for an existing post with the same content. There seems to be a problem with OStatus.
1353                         $condition = ["`body` = ? AND `network` = ? AND `created` = ? AND `contact-id` = ? AND `uid` = ?",
1354                                         $item['body'], $item['network'], $item['created'], $item['contact-id'], $item['uid']];
1355                         if (self::exists($condition)) {
1356                                 Logger::notice('duplicated item with the same body found.', $item);
1357                                 return true;
1358                         }
1359                 }
1360
1361                 /*
1362                  * Check for already added items.
1363                  * There is a timing issue here that sometimes creates double postings.
1364                  * An unique index would help - but the limitations of MySQL (maximum size of index values) prevent this.
1365                  */
1366                 if (($item['uid'] == 0) && self::exists(['uri' => trim($item['uri']), 'uid' => 0])) {
1367                         Logger::notice('Global item already stored.', ['uri' => $item['uri'], 'network' => $item['network']]);
1368                         return true;
1369                 }
1370
1371                 return false;
1372         }
1373
1374         /**
1375          * Check if the item array is valid
1376          *
1377          * @param array $item
1378          * @return boolean item is valid
1379          */
1380         public static function isValid(array $item)
1381         {
1382                 // When there is no content then we don't post it
1383                 if ($item['body'] . $item['title'] == '') {
1384                         Logger::notice('No body, no title.');
1385                         return false;
1386                 }
1387
1388                 if (!empty($item['author-id']) && Contact::isBlocked($item['author-id'])) {
1389                         Logger::notice('Author is blocked node-wide', ['author-link' => $item['author-link'], 'item-uri' => $item['uri']]);
1390                         return false;
1391                 }
1392
1393                 if (!empty($item['author-link']) && Network::isUrlBlocked($item['author-link'])) {
1394                         Logger::notice('Author server is blocked', ['author-link' => $item['author-link'], 'item-uri' => $item['uri']]);
1395                         return false;
1396                 }
1397
1398                 if (!empty($item['owner-id']) && Contact::isBlocked($item['owner-id'])) {
1399                         Logger::notice('Owner is blocked node-wide', ['owner-link' => $item['owner-link'], 'item-uri' => $item['uri']]);
1400                         return false;
1401                 }
1402
1403                 if (!empty($item['owner-link']) && Network::isUrlBlocked($item['owner-link'])) {
1404                         Logger::notice('Owner server is blocked', ['owner-link' => $item['owner-link'], 'item-uri' => $item['uri']]);
1405                         return false;
1406                 }
1407
1408                 if (!empty($item['uid']) && !self::isAllowedByUser($item, $item['uid'])) {
1409                         return false;
1410                 }
1411
1412                 if ($item['verb'] == Activity::FOLLOW) {
1413                         if (!$item['origin'] && ($item['author-id'] == Contact::getPublicIdByUserId($item['uid']))) {
1414                                 // Our own follow request can be relayed to us. We don't store it to avoid notification chaos.
1415                                 Logger::info("Follow: Don't store not origin follow request", ['parent-uri' => $item['parent-uri']]);
1416                                 return false;
1417                         }
1418
1419                         $condition = ['verb' => Activity::FOLLOW, 'uid' => $item['uid'],
1420                                 'parent-uri' => $item['parent-uri'], 'author-id' => $item['author-id']];
1421                         if (self::exists($condition)) {
1422                                 // It happens that we receive multiple follow requests by the same author - we only store one.
1423                                 Logger::info('Follow: Found existing follow request from author', ['author-id' => $item['author-id'], 'parent-uri' => $item['parent-uri']]);
1424                                 return false;
1425                         }
1426                 }
1427
1428                 return true;
1429         }
1430
1431         /**
1432          * Check if the item array is too old
1433          *
1434          * @param array $item
1435          * @return boolean item is too old
1436          */
1437         public static function isTooOld(array $item)
1438         {
1439                 // check for create date and expire time
1440                 $expire_interval = DI::config()->get('system', 'dbclean-expire-days', 0);
1441
1442                 $user = DBA::selectFirst('user', ['expire'], ['uid' => $item['uid']]);
1443                 if (DBA::isResult($user) && ($user['expire'] > 0) && (($user['expire'] < $expire_interval) || ($expire_interval == 0))) {
1444                         $expire_interval = $user['expire'];
1445                 }
1446
1447                 if (($expire_interval > 0) && !empty($item['created'])) {
1448                         $expire_date = time() - ($expire_interval * 86400);
1449                         $created_date = strtotime($item['created']);
1450                         if ($created_date < $expire_date) {
1451                                 Logger::notice('Item created before expiration interval.', [
1452                                         'created' => date('c', $created_date),
1453                                         'expired' => date('c', $expire_date),
1454                                         '$item' => $item
1455                                 ]);
1456                                 return true;
1457                         }
1458                 }
1459
1460                 return false;
1461         }
1462
1463         /**
1464          * Return the id of the given item array if it has been stored before
1465          *
1466          * @param array $item
1467          * @return integer item id
1468          */
1469         private static function getDuplicateID(array $item)
1470         {
1471                 if (empty($item['network']) || in_array($item['network'], Protocol::FEDERATED)) {
1472                         $condition = ["`uri` = ? AND `uid` = ? AND `network` IN (?, ?, ?, ?)",
1473                                 trim($item['uri']), $item['uid'],
1474                                 Protocol::ACTIVITYPUB, Protocol::DIASPORA, Protocol::DFRN, Protocol::OSTATUS];
1475                         $existing = self::selectFirst(['id', 'network'], $condition);
1476                         if (DBA::isResult($existing)) {
1477                                 // We only log the entries with a different user id than 0. Otherwise we would have too many false positives
1478                                 if ($item['uid'] != 0) {
1479                                         Logger::notice('Item already existed for user', [
1480                                                 'uri' => $item['uri'],
1481                                                 'uid' => $item['uid'],
1482                                                 'network' => $item['network'],
1483                                                 'existing_id' => $existing["id"],
1484                                                 'existing_network' => $existing["network"]
1485                                         ]);
1486                                 }
1487
1488                                 return $existing["id"];
1489                         }
1490                 }
1491                 return 0;
1492         }
1493
1494         /**
1495          * Fetch top-level parent data for the given item array
1496          *
1497          * @param array $item
1498          * @return array item array with parent data
1499          * @throws \Exception
1500          */
1501         private static function getTopLevelParent(array $item)
1502         {
1503                 $fields = ['uid', 'uri', 'parent-uri', 'id', 'deleted',
1504                         'allow_cid', 'allow_gid', 'deny_cid', 'deny_gid',
1505                         'wall', 'private', 'forum_mode', 'origin', 'author-id'];
1506                 $condition = ['uri' => $item['thr-parent'], 'uid' => $item['uid']];
1507                 $params = ['order' => ['id' => false]];
1508                 $parent = self::selectFirst($fields, $condition, $params);
1509
1510                 if (!DBA::isResult($parent)) {
1511                         Logger::notice('item parent was not found - ignoring item', ['thr-parent' => $item['thr-parent'], 'uid' => $item['uid']]);
1512                         return [];
1513                 }
1514
1515                 if ($parent['uri'] == $parent['parent-uri']) {
1516                         return $parent;
1517                 }
1518
1519                 $condition = ['uri' => $parent['parent-uri'],
1520                         'parent-uri' => $parent['parent-uri'],
1521                         'uid' => $parent['uid']];
1522                 $params = ['order' => ['id' => false]];
1523                 $toplevel_parent = self::selectFirst($fields, $condition, $params);
1524                 if (!DBA::isResult($toplevel_parent)) {
1525                         Logger::notice('item top level parent was not found - ignoring item', ['parent-uri' => $parent['parent-uri'], 'uid' => $parent['uid']]);
1526                         return [];
1527                 }
1528
1529                 return $toplevel_parent;
1530         }
1531
1532         /**
1533          * Get the gravity for the given item array
1534          *
1535          * @param array $item
1536          * @return integer gravity
1537          */
1538         private static function getGravity(array $item)
1539         {
1540                 $activity = DI::activity();
1541
1542                 if (isset($item['gravity'])) {
1543                         return intval($item['gravity']);
1544                 } elseif ($item['parent-uri'] === $item['uri']) {
1545                         return GRAVITY_PARENT;
1546                 } elseif ($activity->match($item['verb'], Activity::POST)) {
1547                         return GRAVITY_COMMENT;
1548                 } elseif ($activity->match($item['verb'], Activity::FOLLOW)) {
1549                         return GRAVITY_ACTIVITY;
1550                 } elseif ($activity->match($item['verb'], Activity::ANNOUNCE)) {
1551                         return GRAVITY_ACTIVITY;
1552                 }
1553                 Logger::info('Unknown gravity for verb', ['verb' => $item['verb']]);
1554                 return GRAVITY_UNKNOWN;   // Should not happen
1555         }
1556
1557         public static function insert($item, $notify = false, $dontcache = false)
1558         {
1559                 $structure = self::getItemFields();
1560
1561                 $orig_item = $item;
1562
1563                 $priority = PRIORITY_HIGH;
1564
1565                 // If it is a posting where users should get notifications, then define it as wall posting
1566                 if ($notify) {
1567                         $item['wall'] = 1;
1568                         $item['origin'] = 1;
1569                         $item['network'] = Protocol::DFRN;
1570                         $item['protocol'] = Conversation::PARCEL_DIRECT;
1571
1572                         if (in_array($notify, PRIORITIES)) {
1573                                 $priority = $notify;
1574                         }
1575                 } else {
1576                         $item['network'] = trim(($item['network'] ?? '') ?: Protocol::PHANTOM);
1577                 }
1578
1579                 $uid = intval($item['uid']);
1580
1581                 $item['guid'] = self::guid($item, $notify);
1582                 $item['uri'] = substr(trim($item['uri'] ?? '') ?: self::newURI($item['uid'], $item['guid']), 0, 255);
1583
1584                 // Store URI data
1585                 $item['uri-id'] = ItemURI::insert(['uri' => $item['uri'], 'guid' => $item['guid']]);
1586
1587                 // Backward compatibility: parent-uri used to be the direct parent uri.
1588                 // If it is provided without a thr-parent, it probably is the old behavior.
1589                 $item['thr-parent'] = trim($item['thr-parent'] ?? $item['parent-uri'] ?? $item['uri']);
1590                 $item['parent-uri'] = $item['thr-parent'];
1591
1592                 // Store conversation data
1593                 $item = Conversation::insert($item);
1594
1595                 /*
1596                  * Do we already have this item?
1597                  * We have to check several networks since Friendica posts could be repeated
1598                  * via OStatus (maybe Diasporsa as well)
1599                  */
1600                 $duplicate = self::getDuplicateID($item);
1601                 if ($duplicate) {
1602                         return $duplicate;
1603                 }
1604
1605                 // Additional duplicate checks
1606                 /// @todo Check why the first duplication check returns the item number and the second a 0
1607                 if (self::isDuplicate($item)) {
1608                         return 0;
1609                 }
1610
1611                 $item['wall']          = intval($item['wall'] ?? 0);
1612                 $item['extid']         = trim($item['extid'] ?? '');
1613                 $item['author-name']   = trim($item['author-name'] ?? '');
1614                 $item['author-link']   = trim($item['author-link'] ?? '');
1615                 $item['author-avatar'] = trim($item['author-avatar'] ?? '');
1616                 $item['owner-name']    = trim($item['owner-name'] ?? '');
1617                 $item['owner-link']    = trim($item['owner-link'] ?? '');
1618                 $item['owner-avatar']  = trim($item['owner-avatar'] ?? '');
1619                 $item['received']      = (isset($item['received'])  ? DateTimeFormat::utc($item['received'])  : DateTimeFormat::utcNow());
1620                 $item['created']       = (isset($item['created'])   ? DateTimeFormat::utc($item['created'])   : $item['received']);
1621                 $item['edited']        = (isset($item['edited'])    ? DateTimeFormat::utc($item['edited'])    : $item['created']);
1622                 $item['changed']       = (isset($item['changed'])   ? DateTimeFormat::utc($item['changed'])   : $item['created']);
1623                 $item['commented']     = (isset($item['commented']) ? DateTimeFormat::utc($item['commented']) : $item['created']);
1624                 $item['title']         = substr(trim($item['title'] ?? ''), 0, 255);
1625                 $item['location']      = trim($item['location'] ?? '');
1626                 $item['coord']         = trim($item['coord'] ?? '');
1627                 $item['visible']       = (isset($item['visible']) ? intval($item['visible']) : 1);
1628                 $item['deleted']       = 0;
1629                 $item['post-type']     = ($item['post-type'] ?? '') ?: self::PT_ARTICLE;
1630                 $item['verb']          = trim($item['verb'] ?? '');
1631                 $item['object-type']   = trim($item['object-type'] ?? '');
1632                 $item['object']        = trim($item['object'] ?? '');
1633                 $item['target-type']   = trim($item['target-type'] ?? '');
1634                 $item['target']        = trim($item['target'] ?? '');
1635                 $item['plink']         = substr(trim($item['plink'] ?? ''), 0, 255);
1636                 $item['allow_cid']     = trim($item['allow_cid'] ?? '');
1637                 $item['allow_gid']     = trim($item['allow_gid'] ?? '');
1638                 $item['deny_cid']      = trim($item['deny_cid'] ?? '');
1639                 $item['deny_gid']      = trim($item['deny_gid'] ?? '');
1640                 $item['private']       = intval($item['private'] ?? self::PUBLIC);
1641                 $item['body']          = trim($item['body'] ?? '');
1642                 $item['raw-body']      = trim($item['raw-body'] ?? $item['body']);
1643                 $item['app']           = trim($item['app'] ?? '');
1644                 $item['origin']        = intval($item['origin'] ?? 0);
1645                 $item['postopts']      = trim($item['postopts'] ?? '');
1646                 $item['resource-id']   = trim($item['resource-id'] ?? '');
1647                 $item['event-id']      = intval($item['event-id'] ?? 0);
1648                 $item['inform']        = trim($item['inform'] ?? '');
1649                 $item['file']          = trim($item['file'] ?? '');
1650
1651                 // Items cannot be stored before they happen ...
1652                 if ($item['created'] > DateTimeFormat::utcNow()) {
1653                         $item['created'] = DateTimeFormat::utcNow();
1654                 }
1655
1656                 // We haven't invented time travel by now.
1657                 if ($item['edited'] > DateTimeFormat::utcNow()) {
1658                         $item['edited'] = DateTimeFormat::utcNow();
1659                 }
1660
1661                 $item['plink'] = ($item['plink'] ?? '') ?: DI::baseUrl() . '/display/' . urlencode($item['guid']);
1662
1663                 $item['gravity'] = self::getGravity($item);
1664
1665                 $item['language'] = self::getLanguage($item);
1666
1667                 $default = ['url' => $item['author-link'], 'name' => $item['author-name'],
1668                         'photo' => $item['author-avatar'], 'network' => $item['network']];
1669                 $item['author-id'] = ($item['author-id'] ?? 0) ?: Contact::getIdForURL($item['author-link'], 0, null, $default);
1670
1671                 $default = ['url' => $item['owner-link'], 'name' => $item['owner-name'],
1672                         'photo' => $item['owner-avatar'], 'network' => $item['network']];
1673                 $item['owner-id'] = ($item['owner-id'] ?? 0) ?: Contact::getIdForURL($item['owner-link'], 0, null, $default);
1674
1675                 $actor = ($item['gravity'] == GRAVITY_PARENT) ? $item['owner-id'] : $item['author-id'];
1676                 if (!$item['origin'] && ($item['uid'] != 0) && Contact::isSharing($actor, $item['uid'])) {
1677                         $item['post-type'] = self::PT_FOLLOWER;
1678                 }
1679
1680                 // Ensure that there is an avatar cache
1681                 Contact::checkAvatarCache($item['author-id']);
1682                 Contact::checkAvatarCache($item['owner-id']);
1683
1684                 // The contact-id should be set before "self::insert" was called - but there seems to be issues sometimes
1685                 $item["contact-id"] = self::contactId($item);
1686
1687                 if (!self::isValid($item)) {
1688                         return 0;
1689                 }
1690
1691                 if ($item['gravity'] !== GRAVITY_PARENT) {
1692                         $toplevel_parent = self::getTopLevelParent($item);
1693                         if (empty($toplevel_parent)) {
1694                                 return 0;
1695                         }
1696
1697                         // If the thread originated from this node, we check the permission against the thread starter
1698                         $condition = ['uri' => $toplevel_parent['uri'], 'wall' => true];
1699                         $localTopLevelParent = self::selectFirst(['uid'], $condition);
1700                         if (!empty($localTopLevelParent['uid']) && !self::isAllowedByUser($item, $localTopLevelParent['uid'])) {
1701                                 return 0;
1702                         }
1703
1704                         $parent_id          = $toplevel_parent['id'];
1705                         $item['parent-uri'] = $toplevel_parent['uri'];
1706                         $item['deleted']    = $toplevel_parent['deleted'];
1707                         $item['allow_cid']  = $toplevel_parent['allow_cid'];
1708                         $item['allow_gid']  = $toplevel_parent['allow_gid'];
1709                         $item['deny_cid']   = $toplevel_parent['deny_cid'];
1710                         $item['deny_gid']   = $toplevel_parent['deny_gid'];
1711                         $parent_origin      = $toplevel_parent['origin'];
1712
1713                         // Don't federate received participation messages
1714                         if ($item['verb'] != Activity::FOLLOW) {
1715                                 $item['wall'] = $toplevel_parent['wall'];
1716                         } else {
1717                                 $item['wall'] = false;
1718                         }
1719
1720                         /*
1721                          * If the parent is private, force privacy for the entire conversation
1722                          * This differs from the above settings as it subtly allows comments from
1723                          * email correspondents to be private even if the overall thread is not.
1724                          */
1725                         if ($toplevel_parent['private']) {
1726                                 $item['private'] = $toplevel_parent['private'];
1727                         }
1728
1729                         /*
1730                          * Edge case. We host a public forum that was originally posted to privately.
1731                          * The original author commented, but as this is a comment, the permissions
1732                          * weren't fixed up so it will still show the comment as private unless we fix it here.
1733                          */
1734                         if ((intval($toplevel_parent['forum_mode']) == 1) && ($toplevel_parent['private'] != self::PUBLIC)) {
1735                                 $item['private'] = self::PUBLIC;
1736                         }
1737
1738                         // If its a post that originated here then tag the thread as "mention"
1739                         if ($item['origin'] && $item['uid']) {
1740                                 DBA::update('thread', ['mention' => true], ['iid' => $parent_id]);
1741                                 Logger::info('tagged thread as mention', ['parent' => $parent_id, 'uid' => $item['uid']]);
1742                         }
1743
1744                         // Update the contact relations
1745                         Contact\Relation::store($toplevel_parent['author-id'], $item['author-id'], $item['created']);
1746
1747                         unset($item['parent_origin']);
1748                 } else {
1749                         $parent_id = 0;
1750                         $parent_origin = $item['origin'];
1751                 }
1752
1753                 // We don't store the causer link, only the id
1754                 unset($item['causer-link']);
1755
1756                 // We don't store these fields anymore in the item table
1757                 unset($item['author-link']);
1758                 unset($item['author-name']);
1759                 unset($item['author-avatar']);
1760                 unset($item['author-network']);
1761
1762                 unset($item['owner-link']);
1763                 unset($item['owner-name']);
1764                 unset($item['owner-avatar']);
1765
1766                 $item['parent-uri-id'] = ItemURI::getIdByURI($item['parent-uri']);
1767                 $item['thr-parent-id'] = ItemURI::getIdByURI($item['thr-parent']);
1768
1769                 // Is this item available in the global items (with uid=0)?
1770                 if ($item["uid"] == 0) {
1771                         $item["global"] = true;
1772
1773                         // Set the global flag on all items if this was a global item entry
1774                         DBA::update('item', ['global' => true], ['uri' => $item["uri"]]);
1775                 } else {
1776                         $item["global"] = self::exists(['uid' => 0, 'uri' => $item["uri"]]);
1777                 }
1778
1779                 // ACL settings
1780                 if (!empty($item["allow_cid"] . $item["allow_gid"] . $item["deny_cid"] . $item["deny_gid"])) {
1781                         $item["private"] = self::PRIVATE;
1782                 }
1783
1784                 if ($notify) {
1785                         $item['edit'] = false;
1786                         $item['parent'] = $parent_id;
1787                         Hook::callAll('post_local', $item);
1788                         unset($item['edit']);
1789                 } else {
1790                         Hook::callAll('post_remote', $item);
1791                 }
1792
1793                 // Set after the insert because top-level posts are self-referencing
1794                 unset($item['parent']);
1795
1796                 if (!empty($item['cancel'])) {
1797                         Logger::log('post cancelled by addon.');
1798                         return 0;
1799                 }
1800
1801                 if (empty($item['vid']) && !empty($item['verb'])) {
1802                         $item['vid'] = Verb::getID($item['verb']);
1803                 }
1804
1805                 // Creates or assigns the permission set
1806                 $item['psid'] = PermissionSet::getIdFromACL(
1807                         $item['uid'],
1808                         $item['allow_cid'],
1809                         $item['allow_gid'],
1810                         $item['deny_cid'],
1811                         $item['deny_gid']
1812                 );
1813
1814                 unset($item['allow_cid']);
1815                 unset($item['allow_gid']);
1816                 unset($item['deny_cid']);
1817                 unset($item['deny_gid']);
1818
1819                 // This array field is used to trigger some automatic reactions
1820                 // It is mainly used in the "post_local" hook.
1821                 unset($item['api_source']);
1822
1823                 if ($item['verb'] == Activity::ANNOUNCE) {
1824                         self::setOwnerforResharedItem($item);
1825                 }
1826
1827                 // Remove all media attachments from the body and store them in the post-media table
1828                 $item['raw-body'] = Post\Media::insertFromBody($item['uri-id'], $item['raw-body']);
1829                 $item['raw-body'] = self::setHashtags($item['raw-body']);
1830
1831                 // Check for hashtags in the body and repair or add hashtag links
1832                 $item['body'] = self::setHashtags($item['body']);
1833
1834                 if (!empty($item['attach'])) {
1835                         Post\Media::insertFromAttachment($item['uri-id'], $item['attach']);
1836                 }
1837
1838                 // Fill the cache field
1839                 self::putInCache($item);
1840
1841                 if (stristr($item['verb'], Activity::POKE)) {
1842                         $notify_type = Delivery::POKE;
1843                 } else {
1844                         $notify_type = Delivery::POST;
1845                 }
1846
1847                 if (!in_array($item['verb'], self::ACTIVITIES)) {
1848                         $item['icid'] = self::insertContent($item);
1849                         if (empty($item['icid'])) {
1850                                 // This shouldn't happen
1851                                 Logger::warning('No content stored, quitting', ['guid' => $item['guid'], 'uri-id' => $item['uri-id'], 'causer-id' => ($item['causer-id'] ?? 0), 'post-type' => $item['post-type'], 'network' => $item['network']]);
1852                                 return 0;
1853                         }
1854                 }
1855
1856                 $body = $item['body'];
1857                 $verb = $item['verb'];
1858
1859                 // We just remove everything that is content
1860                 foreach (array_merge(self::CONTENT_FIELDLIST, self::MIXED_CONTENT_FIELDLIST) as $field) {
1861                         unset($item[$field]);
1862                 }
1863
1864                 unset($item['activity']);
1865
1866                 // Filling item related side tables
1867
1868                 // Diaspora signature
1869                 if (!empty($item['diaspora_signed_text'])) {
1870                         DBA::replace('diaspora-interaction', ['uri-id' => $item['uri-id'], 'interaction' => $item['diaspora_signed_text']]);
1871                 }
1872
1873                 unset($item['diaspora_signed_text']);
1874
1875                 // Attached file links
1876                 if (!empty($item['file'])) {
1877                         Post\Category::storeTextByURIId($item['uri-id'], $item['uid'], $item['file']);
1878                 }
1879
1880                 unset($item['file']);
1881
1882                 // Delivery relevant data
1883                 $delivery_data = Post\DeliveryData::extractFields($item);
1884                 unset($item['postopts']);
1885                 unset($item['inform']);
1886
1887                 if (!empty($item['origin']) || !empty($item['wall']) || !empty($delivery_data['postopts']) || !empty($delivery_data['inform'])) {
1888                         Post\DeliveryData::insert($item['uri-id'], $delivery_data);
1889                 }
1890
1891                 // Store tags from the body if this hadn't been handled previously in the protocol classes
1892                 if (!Tag::existsForPost($item['uri-id'])) {
1893                         Tag::storeFromBody($item['uri-id'], $body);
1894                 }
1895
1896                 if (Post\User::insert($item['uri-id'], $item['uid'], $item)) {
1897                         // Remove all fields that aren't part of the item table
1898                         foreach ($item as $field => $value) {
1899                                 if (!in_array($field, $structure['item'])) {
1900                                         unset($item[$field]);
1901                                 }
1902                         }
1903
1904                         $condition = ['uri-id' => $item['uri-id'], 'uid' => $item['uid'], 'network' => $item['network']];
1905                         if (DBA::exists('item', $condition)) {
1906                                 Logger::notice('Item is already inserted - aborting', $condition);
1907                                 return 0;
1908                         }
1909
1910                         $result = DBA::insert('item', $item);
1911
1912                         // When the item was successfully stored we fetch the ID of the item.
1913                         $current_post = DBA::lastInsertId();
1914                 } else {
1915                         Logger::notice('Post-User is already inserted - aborting', ['uid' => $item['uid'], 'uri-id' => $item['uri-id']]);
1916                         return 0;
1917                 }
1918
1919                 if (empty($current_post) || !DBA::isResult($result)) {
1920                         // On failure store the data into a spool file so that the "SpoolPost" worker can try again later.
1921                         Logger::warning('Could not store item. it will be spooled', ['result' => $result, 'id' => $current_post]);
1922                         self::spool($orig_item);
1923                         return 0;
1924                 }
1925
1926                 Logger::notice('created item', ['id' => $current_post, 'uid' => $item['uid'], 'network' => $item['network'], 'uri-id' => $item['uri-id'], 'guid' => $item['guid']]);
1927
1928                 if (!$parent_id || ($item['gravity'] === GRAVITY_PARENT)) {
1929                         $parent_id = $current_post;
1930                 }
1931
1932                 // Set parent id
1933                 DBA::update('item', ['parent' => $parent_id], ['id' => $current_post]);
1934
1935                 $item['id'] = $current_post;
1936                 $item['parent'] = $parent_id;
1937
1938                 // update the commented timestamp on the parent
1939                 if (DI::config()->get('system', 'like_no_comment')) {
1940                         // Update when it is a comment
1941                         $update_commented = in_array($item['gravity'], [GRAVITY_PARENT, GRAVITY_COMMENT]);
1942                 } else {
1943                         // Update when it isn't a follow or tag verb
1944                         $update_commented = !in_array($verb, [Activity::FOLLOW, Activity::TAG]);
1945                 }
1946
1947                 if ($update_commented) {
1948                         DBA::update('item', ['commented' => DateTimeFormat::utcNow(), 'changed' => DateTimeFormat::utcNow()], ['id' => $parent_id]);
1949                 } else {
1950                         DBA::update('item', ['changed' => DateTimeFormat::utcNow()], ['id' => $parent_id]);
1951                 }
1952
1953                 if ($item['gravity'] === GRAVITY_PARENT) {
1954                         self::addThread($current_post);
1955                 } else {
1956                         self::updateThread($parent_id);
1957                 }
1958
1959                 // In that function we check if this is a forum post. Additionally we delete the item under certain circumstances
1960                 if (self::tagDeliver($item['uid'], $current_post)) {
1961                         // Get the user information for the logging
1962                         $user = User::getById($uid);
1963
1964                         Logger::notice('Item had been deleted', ['id' => $current_post, 'user' => $uid, 'account-type' => $user['account-type']]);
1965                         return 0;
1966                 }
1967
1968                 if (!$dontcache) {
1969                         $posted_item = self::selectFirst(self::ITEM_FIELDLIST, ['id' => $current_post]);
1970                         if (DBA::isResult($posted_item)) {
1971                                 if ($notify) {
1972                                         Hook::callAll('post_local_end', $posted_item);
1973                                 } else {
1974                                         Hook::callAll('post_remote_end', $posted_item);
1975                                 }
1976                         } else {
1977                                 Logger::log('new item not found in DB, id ' . $current_post);
1978                         }
1979                 }
1980
1981                 if ($item['gravity'] === GRAVITY_PARENT) {
1982                         self::addShadow($current_post);
1983                 } else {
1984                         self::addShadowPost($current_post);
1985                 }
1986
1987                 self::updateContact($item);
1988
1989                 UserItem::setNotification($current_post);
1990
1991                 check_user_notification($current_post);
1992
1993                 // Distribute items to users who subscribed to their tags
1994                 self::distributeByTags($item);
1995
1996                 // Automatically reshare the item if the "remote_self" option is selected
1997                 self::autoReshare($item);
1998
1999                 $transmit = $notify || ($item['visible'] && ($parent_origin || $item['origin']));
2000
2001                 if ($transmit) {
2002                         $transmit_item = Item::selectFirst(['verb', 'origin'], ['id' => $item['id']]);
2003                         // Don't relay participation messages
2004                         if (($transmit_item['verb'] == Activity::FOLLOW) &&
2005                                 (!$transmit_item['origin'] || ($item['author-id'] != Contact::getPublicIdByUserId($uid)))) {
2006                                 Logger::info('Participation messages will not be relayed', ['item' => $item['id'], 'uri' => $item['uri'], 'verb' => $transmit_item['verb']]);
2007                                 $transmit = false;
2008                         }
2009                 }
2010
2011                 if ($transmit) {
2012                         Worker::add(['priority' => $priority, 'dont_fork' => true], 'Notifier', $notify_type, $current_post);
2013                 }
2014
2015                 return $current_post;
2016         }
2017
2018         /**
2019          * Change the owner of a parent item if it had been shared by a forum
2020          *
2021          * (public) forum posts in the new format consist of the regular post by the author
2022          * followed by an announce message sent from the forum account.
2023          * Changing the owner helps in grouping forum posts.
2024          *
2025          * @param array $item
2026          * @return void
2027          */
2028         private static function setOwnerforResharedItem(array $item)
2029         {
2030                 $parent = self::selectFirst(['id', 'causer-id', 'owner-id', 'author-id', 'author-link', 'origin', 'post-type'],
2031                         ['uri-id' => $item['thr-parent-id'], 'uid' => $item['uid']]);
2032                 if (!DBA::isResult($parent)) {
2033                         Logger::error('Parent not found', ['uri-id' => $item['thr-parent-id'], 'uid' => $item['uid']]);
2034                         return;
2035                 }
2036
2037                 $author = Contact::selectFirst(['url', 'contact-type'], ['id' => $item['author-id']]);
2038                 if (!DBA::isResult($author)) {
2039                         Logger::error('Author not found', ['id' => $item['author-id']]);
2040                         return;
2041                 }
2042
2043                 $cid = Contact::getIdForURL($author['url'], $item['uid']);
2044                 if (empty($cid) || !Contact::isSharing($cid, $item['uid'])) {
2045                         Logger::info('The resharer is not a following contact: quit', ['resharer' => $author['url'], 'uid' => $item['uid']]);
2046                         return;
2047                 }
2048
2049                 if ($author['contact-type'] != Contact::TYPE_COMMUNITY) {
2050                         if ($parent['post-type'] == self::PT_ANNOUNCEMENT) {
2051                                 Logger::info('The parent is already marked as announced: quit', ['causer' => $parent['causer-id'], 'owner' => $parent['owner-id'], 'author' => $parent['author-id'], 'uid' => $item['uid']]);
2052                                 return;
2053                         }
2054
2055                         if (Contact::isSharing($parent['owner-id'], $item['uid'])) {
2056                                 Logger::info('The resharer is no forum: quit', ['resharer' => $item['author-id'], 'owner' => $parent['owner-id'], 'author' => $parent['author-id'], 'uid' => $item['uid']]);
2057                                 return;
2058                         }
2059                         self::update(['post-type' => self::PT_ANNOUNCEMENT, 'causer-id' => $item['author-id']], ['id' => $parent['id']]);
2060                         Logger::info('Set announcement post-type', ['uri-id' => $item['uri-id'], 'thr-parent-id' => $item['thr-parent-id'], 'uid' => $item['uid']]);
2061                         return;
2062                 }
2063
2064                 self::update(['owner-id' => $item['author-id'], 'contact-id' => $cid], ['id' => $parent['id']]);
2065                 Logger::info('Change owner of the parent', ['uri-id' => $item['uri-id'], 'thr-parent-id' => $item['thr-parent-id'], 'uid' => $item['uid'], 'owner-id' => $item['author-id'], 'contact-id' => $cid]);
2066         }
2067
2068         /**
2069          * Distribute the given item to users who subscribed to their tags
2070          *
2071          * @param array $item     Processed item
2072          */
2073         private static function distributeByTags(array $item)
2074         {
2075                 if (($item['uid'] != 0) || ($item['gravity'] != GRAVITY_PARENT) || !in_array($item['network'], Protocol::FEDERATED)) {
2076                         return;
2077                 }
2078
2079                 $uids = Tag::getUIDListByURIId($item['uri-id']);
2080                 foreach ($uids as $uid) {
2081                         if (Contact::isSharing($item['author-id'], $uid)) {
2082                                 $fields = [];
2083                         } else {
2084                                 $fields = ['post-type' => self::PT_TAG];
2085                         }
2086
2087                         $stored = self::storeForUserByUriId($item['uri-id'], $uid, $fields);
2088                         Logger::info('Stored item for users', ['uri-id' => $item['uri-id'], 'uid' => $uid, 'fields' => $fields, 'stored' => $stored]);
2089                 }
2090         }
2091
2092         /**
2093          * Insert a new item content entry
2094          *
2095          * @param array $item The item fields that are to be inserted
2096          * @throws \Exception
2097          */
2098         private static function insertContent(array $item)
2099         {
2100                 $fields = ['uri-plink-hash' => (string)$item['uri-id'], 'uri-id' => $item['uri-id']];
2101
2102                 foreach (array_merge(self::CONTENT_FIELDLIST, self::MIXED_CONTENT_FIELDLIST) as $field) {
2103                         if (isset($item[$field])) {
2104                                 $fields[$field] = $item[$field];
2105                         }
2106                 }
2107
2108                 $item_content = DBA::selectFirst('item-content', ['id'], ['uri-id' => $item['uri-id']]);
2109                 if (DBA::isResult($item_content)) {
2110                         $icid = $item_content['id'];
2111                         Logger::info('Existing content found', ['icid' => $icid, 'uri' => $item['uri']]);
2112                         return $icid;
2113                 }
2114
2115                 DBA::replace('item-content', $fields);
2116
2117                 $item_content = DBA::selectFirst('item-content', ['id'], ['uri-id' => $item['uri-id']]);
2118                 if (DBA::isResult($item_content)) {
2119                         $icid = $item_content['id'];
2120                         Logger::notice('Content inserted', ['icid' => $icid, 'uri' => $item['uri']]);
2121                         return $icid;
2122                 }
2123
2124                 // This shouldn't happen.
2125                 Logger::error("Content wasn't inserted", $item);
2126                 return null;
2127         }
2128
2129         /**
2130          * Update existing item content entries
2131          *
2132          * @param array $item      The item fields that are to be changed
2133          * @param array $condition The condition for finding the item content entries
2134          * @throws \Exception
2135          */
2136         private static function updateContent($item, $condition)
2137         {
2138                 // We have to select only the fields from the "item-content" table
2139                 $fields = [];
2140                 foreach (array_merge(self::CONTENT_FIELDLIST, self::MIXED_CONTENT_FIELDLIST) as $field) {
2141                         if (isset($item[$field])) {
2142                                 $fields[$field] = $item[$field];
2143                         }
2144                 }
2145
2146                 if (empty($fields)) {
2147                         return;
2148                 }
2149
2150                 DBA::update('item-content', $fields, $condition, true);
2151                 Logger::info('Updated content', ['condition' => $condition]);
2152         }
2153
2154         /**
2155          * Distributes public items to the receivers
2156          *
2157          * @param integer $itemid      Item ID that should be added
2158          * @param string  $signed_text Original text (for Diaspora signatures), JSON encoded.
2159          * @throws \Exception
2160          */
2161         public static function distribute($itemid, $signed_text = '')
2162         {
2163                 $condition = ["`id` IN (SELECT `parent` FROM `item` WHERE `id` = ?)", $itemid];
2164                 $parent = self::selectFirst(['owner-id'], $condition);
2165                 if (!DBA::isResult($parent)) {
2166                         return;
2167                 }
2168
2169                 // Only distribute public items from native networks
2170                 $condition = ['id' => $itemid, 'uid' => 0,
2171                         'network' => array_merge(Protocol::FEDERATED ,['']),
2172                         'visible' => true, 'deleted' => false, 'moderated' => false, 'private' => [self::PUBLIC, self::UNLISTED]];
2173                 $item = self::selectFirst(self::ITEM_FIELDLIST, $condition);
2174                 if (!DBA::isResult($item)) {
2175                         return;
2176                 }
2177
2178                 $origin = $item['origin'];
2179
2180                 $users = [];
2181
2182                 /// @todo add a field "pcid" in the contact table that referrs to the public contact id.
2183                 $owner = DBA::selectFirst('contact', ['url', 'nurl', 'alias'], ['id' => $parent['owner-id']]);
2184                 if (!DBA::isResult($owner)) {
2185                         return;
2186                 }
2187
2188                 $condition = ['nurl' => $owner['nurl'], 'rel' => [Contact::SHARING, Contact::FRIEND]];
2189                 $contacts = DBA::select('contact', ['uid'], $condition);
2190                 while ($contact = DBA::fetch($contacts)) {
2191                         if ($contact['uid'] == 0) {
2192                                 continue;
2193                         }
2194
2195                         $users[$contact['uid']] = $contact['uid'];
2196                 }
2197                 DBA::close($contacts);
2198
2199                 $condition = ['alias' => $owner['url'], 'rel' => [Contact::SHARING, Contact::FRIEND]];
2200                 $contacts = DBA::select('contact', ['uid'], $condition);
2201                 while ($contact = DBA::fetch($contacts)) {
2202                         if ($contact['uid'] == 0) {
2203                                 continue;
2204                         }
2205
2206                         $users[$contact['uid']] = $contact['uid'];
2207                 }
2208                 DBA::close($contacts);
2209
2210                 if (!empty($owner['alias'])) {
2211                         $condition = ['nurl' => Strings::normaliseLink($owner['alias']), 'rel' => [Contact::SHARING, Contact::FRIEND]];
2212                         $contacts = DBA::select('contact', ['uid'], $condition);
2213                         while ($contact = DBA::fetch($contacts)) {
2214                                 if ($contact['uid'] == 0) {
2215                                         continue;
2216                                 }
2217
2218                                 $users[$contact['uid']] = $contact['uid'];
2219                         }
2220                         DBA::close($contacts);
2221                 }
2222
2223                 $origin_uid = 0;
2224
2225                 if ($item['uri'] != $item['parent-uri']) {
2226                         $parents = self::select(['uid', 'origin'], ["`uri` = ? AND `uid` != 0", $item['parent-uri']]);
2227                         while ($parent = self::fetch($parents)) {
2228                                 $users[$parent['uid']] = $parent['uid'];
2229                                 if ($parent['origin'] && !$origin) {
2230                                         $origin_uid = $parent['uid'];
2231                                 }
2232                         }
2233                 }
2234
2235                 foreach ($users as $uid) {
2236                         if ($origin_uid == $uid) {
2237                                 $item['diaspora_signed_text'] = $signed_text;
2238                         }
2239                         self::storeForUser($item, $uid);
2240                 }
2241         }
2242
2243         /**
2244          * Store a public item defined by their URI-ID for the given users
2245          *
2246          * @param integer $uri_id URI-ID of the given item
2247          * @param integer $uid    The user that will receive the item entry
2248          * @param array   $fields Additional fields to be stored
2249          * @return integer stored item id
2250          */
2251         public static function storeForUserByUriId(int $uri_id, int $uid, array $fields = [])
2252         {
2253                 $item = self::selectFirst(self::ITEM_FIELDLIST, ['uri-id' => $uri_id, 'uid' => 0]);
2254                 if (!DBA::isResult($item)) {
2255                         return 0;
2256                 }
2257
2258                 if (($item['private'] == self::PRIVATE) || !in_array($item['network'], Protocol::FEDERATED)) {
2259                         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']]);
2260                         return 0;
2261                 }
2262
2263                 $item['post-type'] = self::PT_STORED;
2264
2265                 $item = array_merge($item, $fields);
2266
2267                 $stored = self::storeForUser($item, $uid);
2268                 Logger::info('Public item stored for user', ['uri-id' => $item['uri-id'], 'uid' => $uid, 'stored' => $stored]);
2269                 return $stored;
2270         }
2271
2272         /**
2273          * Store a public item array for the given users
2274          *
2275          * @param array   $item   The item entry that will be stored
2276          * @param integer $uid    The user that will receive the item entry
2277          * @return integer stored item id
2278          * @throws \Exception
2279          */
2280         private static function storeForUser(array $item, int $uid)
2281         {
2282                 if (self::exists(['uri-id' => $item['uri-id'], 'uid' => $uid])) {
2283                         Logger::info('Item already exists', ['uri-id' => $item['uri-id'], 'uid' => $uid]);
2284                         return 0;
2285                 }
2286
2287                 unset($item['id']);
2288                 unset($item['parent']);
2289                 unset($item['mention']);
2290                 unset($item['starred']);
2291                 unset($item['unseen']);
2292                 unset($item['psid']);
2293
2294                 $item['uid'] = $uid;
2295                 $item['origin'] = 0;
2296                 $item['wall'] = 0;
2297
2298                 if ($item['gravity'] == GRAVITY_PARENT) {
2299                         $contact = Contact::getByURLForUser($item['owner-link'], $uid, false, ['id']);
2300                 } else {
2301                         $contact = Contact::getByURLForUser($item['author-link'], $uid, false, ['id']);
2302                 }
2303
2304                 if (!empty($contact['id'])) {
2305                         $item['contact-id'] = $contact['id'];
2306                 } else {
2307                         // Shouldn't happen at all
2308                         Logger::warning('contact-id could not be fetched', ['uid' => $uid, 'item' => $item]);
2309                         $self = DBA::selectFirst('contact', ['id'], ['self' => true, 'uid' => $uid]);
2310                         if (!DBA::isResult($self)) {
2311                                 // Shouldn't happen even less
2312                                 Logger::warning('self contact could not be fetched', ['uid' => $uid, 'item' => $item]);
2313                                 return 0;
2314                         }
2315                         $item['contact-id'] = $self['id'];
2316                 }
2317
2318                 /// @todo Handling of "event-id"
2319
2320                 $notify = false;
2321                 if ($item['gravity'] == GRAVITY_PARENT) {
2322                         $contact = DBA::selectFirst('contact', [], ['id' => $item['contact-id'], 'self' => false]);
2323                         if (DBA::isResult($contact)) {
2324                                 $notify = self::isRemoteSelf($contact, $item);
2325                         }
2326                 }
2327
2328                 $distributed = self::insert($item, $notify, true);
2329
2330                 if (!$distributed) {
2331                         Logger::info("Distributed public item wasn't stored", ['uri-id' => $item['uri-id'], 'user' => $uid]);
2332                 } else {
2333                         Logger::info('Distributed public item was stored', ['uri-id' => $item['uri-id'], 'user' => $uid, 'stored' => $distributed]);
2334                 }
2335                 return $distributed;
2336         }
2337
2338         /**
2339          * Add a shadow entry for a given item id that is a thread starter
2340          *
2341          * We store every public item entry additionally with the user id "0".
2342          * This is used for the community page and for the search.
2343          * It is planned that in the future we will store public item entries only once.
2344          *
2345          * @param integer $itemid Item ID that should be added
2346          * @throws \Exception
2347          */
2348         private static function addShadow($itemid)
2349         {
2350                 $fields = ['uid', 'private', 'moderated', 'visible', 'deleted', 'network', 'uri'];
2351                 $condition = ['id' => $itemid, 'parent' => [0, $itemid]];
2352                 $item = self::selectFirst($fields, $condition);
2353
2354                 if (!DBA::isResult($item)) {
2355                         return;
2356                 }
2357
2358                 // is it already a copy?
2359                 if (($itemid == 0) || ($item['uid'] == 0)) {
2360                         return;
2361                 }
2362
2363                 // Is it a visible public post?
2364                 if (!$item["visible"] || $item["deleted"] || $item["moderated"] || ($item["private"] == Item::PRIVATE)) {
2365                         return;
2366                 }
2367
2368                 // is it an entry from a connector? Only add an entry for natively connected networks
2369                 if (!in_array($item["network"], array_merge(Protocol::FEDERATED ,['']))) {
2370                         return;
2371                 }
2372
2373                 if (self::exists(['uri' => $item['uri'], 'uid' => 0])) {
2374                         return;
2375                 }
2376
2377                 $item = self::selectFirst(self::ITEM_FIELDLIST, ['id' => $itemid]);
2378
2379                 if (DBA::isResult($item)) {
2380                         // Preparing public shadow (removing user specific data)
2381                         $item['uid'] = 0;
2382                         unset($item['id']);
2383                         unset($item['parent']);
2384                         unset($item['wall']);
2385                         unset($item['mention']);
2386                         unset($item['origin']);
2387                         unset($item['starred']);
2388                         unset($item['postopts']);
2389                         unset($item['inform']);
2390                         unset($item['post-type']);
2391                         if ($item['uri'] == $item['parent-uri']) {
2392                                 $item['contact-id'] = $item['owner-id'];
2393                         } else {
2394                                 $item['contact-id'] = $item['author-id'];
2395                         }
2396
2397                         $public_shadow = self::insert($item, false, true);
2398
2399                         Logger::info('Stored public shadow', ['thread' => $itemid, 'id' => $public_shadow]);
2400                 }
2401         }
2402
2403         /**
2404          * Add a shadow entry for a given item id that is a comment
2405          *
2406          * This function does the same like the function above - but for comments
2407          *
2408          * @param integer $itemid Item ID that should be added
2409          * @throws \Exception
2410          */
2411         private static function addShadowPost($itemid)
2412         {
2413                 $item = self::selectFirst(self::ITEM_FIELDLIST, ['id' => $itemid]);
2414                 if (!DBA::isResult($item)) {
2415                         return;
2416                 }
2417
2418                 // Is it a toplevel post?
2419                 if ($item['gravity'] == GRAVITY_PARENT) {
2420                         self::addShadow($itemid);
2421                         return;
2422                 }
2423
2424                 // Is this a shadow entry?
2425                 if ($item['uid'] == 0) {
2426                         return;
2427                 }
2428
2429                 // Is there a shadow parent?
2430                 if (!self::exists(['uri' => $item['parent-uri'], 'uid' => 0])) {
2431                         return;
2432                 }
2433
2434                 // Is there already a shadow entry?
2435                 if (self::exists(['uri' => $item['uri'], 'uid' => 0])) {
2436                         return;
2437                 }
2438
2439                 // Save "origin" and "parent" state
2440                 $origin = $item['origin'];
2441                 $parent = $item['parent'];
2442
2443                 // Preparing public shadow (removing user specific data)
2444                 $item['uid'] = 0;
2445                 unset($item['id']);
2446                 unset($item['parent']);
2447                 unset($item['wall']);
2448                 unset($item['mention']);
2449                 unset($item['origin']);
2450                 unset($item['starred']);
2451                 unset($item['postopts']);
2452                 unset($item['inform']);
2453                 unset($item['post-type']);
2454                 $item['contact-id'] = Contact::getIdForURL($item['author-link']);
2455
2456                 $public_shadow = self::insert($item, false, true);
2457
2458                 Logger::info('Stored public shadow', ['uri' => $item['uri'], 'id' => $public_shadow]);
2459
2460                 // If this was a comment to a Diaspora post we don't get our comment back.
2461                 // This means that we have to distribute the comment by ourselves.
2462                 if ($origin && self::exists(['id' => $parent, 'network' => Protocol::DIASPORA])) {
2463                         self::distribute($public_shadow);
2464                 }
2465         }
2466
2467         /**
2468          * Adds a language specification in a "language" element of given $arr.
2469          * Expects "body" element to exist in $arr.
2470          *
2471          * @param array $item
2472          * @return string detected language
2473          * @throws \Text_LanguageDetect_Exception
2474          */
2475         private static function getLanguage(array $item)
2476         {
2477                 if (!in_array($item['gravity'], [GRAVITY_PARENT, GRAVITY_COMMENT]) || empty($item['body'])) {
2478                         return '';
2479                 }
2480
2481                 // Convert attachments to links
2482                 $naked_body = BBCode::removeAttachment($item['body']);
2483                 if (empty($naked_body)) {
2484                         return '';
2485                 }
2486
2487                 // Remove links and pictures
2488                 $naked_body = BBCode::removeLinks($naked_body);
2489
2490                 // Convert the title and the body to plain text
2491                 $naked_body = trim($item['title'] . "\n" . BBCode::toPlaintext($naked_body));
2492
2493                 // Remove possibly remaining links
2494                 $naked_body = preg_replace(Strings::autoLinkRegEx(), '', $naked_body);
2495
2496                 if (empty($naked_body)) {
2497                         return '';
2498                 }
2499
2500                 $ld = new Language(DI::l10n()->getAvailableLanguages());
2501                 $languages = $ld->detect($naked_body)->limit(0, 3)->close();
2502                 if (is_array($languages)) {
2503                         return json_encode($languages);
2504                 }
2505
2506                 return '';
2507         }
2508
2509         public static function getLanguageMessage(array $item)
2510         {
2511                 $iso639 = new \Matriphe\ISO639\ISO639;
2512
2513                 $used_languages = '';
2514                 foreach (json_decode($item['language'], true) as $language => $reliability) {
2515                         $used_languages .= $iso639->languageByCode1($language) . ' (' . $language . "): " . number_format($reliability, 5) . '\n';
2516                 }
2517                 $used_languages = DI::l10n()->t('Detected languages in this post:\n%s', $used_languages);
2518                 return $used_languages;
2519         }
2520
2521         /**
2522          * Creates an unique guid out of a given uri
2523          *
2524          * @param string $uri uri of an item entry
2525          * @param string $host hostname for the GUID prefix
2526          * @return string unique guid
2527          */
2528         public static function guidFromUri($uri, $host)
2529         {
2530                 // Our regular guid routine is using this kind of prefix as well
2531                 // We have to avoid that different routines could accidentally create the same value
2532                 $parsed = parse_url($uri);
2533
2534                 // We use a hash of the hostname as prefix for the guid
2535                 $guid_prefix = hash("crc32", $host);
2536
2537                 // Remove the scheme to make sure that "https" and "http" doesn't make a difference
2538                 unset($parsed["scheme"]);
2539
2540                 // Glue it together to be able to make a hash from it
2541                 $host_id = implode("/", $parsed);
2542
2543                 // We could use any hash algorithm since it isn't a security issue
2544                 $host_hash = hash("ripemd128", $host_id);
2545
2546                 return $guid_prefix.$host_hash;
2547         }
2548
2549         /**
2550          * generate an unique URI
2551          *
2552          * @param integer $uid  User id
2553          * @param string  $guid An existing GUID (Otherwise it will be generated)
2554          *
2555          * @return string
2556          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
2557          */
2558         public static function newURI($uid, $guid = "")
2559         {
2560                 if ($guid == "") {
2561                         $guid = System::createUUID();
2562                 }
2563
2564                 return DI::baseUrl()->get() . '/objects/' . $guid;
2565         }
2566
2567         /**
2568          * Set "success_update" and "last-item" to the date of the last time we heard from this contact
2569          *
2570          * This can be used to filter for inactive contacts.
2571          * Only do this for public postings to avoid privacy problems, since poco data is public.
2572          * Don't set this value if it isn't from the owner (could be an author that we don't know)
2573          *
2574          * @param array $arr Contains the just posted item record
2575          * @throws \Exception
2576          */
2577         private static function updateContact($arr)
2578         {
2579                 // Unarchive the author
2580                 $contact = DBA::selectFirst('contact', [], ['id' => $arr["author-id"]]);
2581                 if (DBA::isResult($contact)) {
2582                         Contact::unmarkForArchival($contact);
2583                 }
2584
2585                 // Unarchive the contact if it's not our own contact
2586                 $contact = DBA::selectFirst('contact', [], ['id' => $arr["contact-id"], 'self' => false]);
2587                 if (DBA::isResult($contact)) {
2588                         Contact::unmarkForArchival($contact);
2589                 }
2590
2591                 /// @todo On private posts we could obfuscate the date
2592                 $update = ($arr['private'] != self::PRIVATE) || in_array($arr['network'], Protocol::FEDERATED);
2593
2594                 // Is it a forum? Then we don't care about the rules from above
2595                 if (!$update && in_array($arr["network"], [Protocol::ACTIVITYPUB, Protocol::DFRN]) && ($arr["parent-uri"] === $arr["uri"])) {
2596                         if (DBA::exists('contact', ['id' => $arr['contact-id'], 'forum' => true])) {
2597                                 $update = true;
2598                         }
2599                 }
2600
2601                 if ($update) {
2602                         // The "self" contact id is used (for example in the connectors) when the contact is unknown
2603                         // So we have to ensure to only update the last item when it had been our own post,
2604                         // or it had been done by a "regular" contact.
2605                         if (!empty($arr['wall'])) {
2606                                 $condition = ['id' => $arr['contact-id']];
2607                         } else {
2608                                 $condition = ['id' => $arr['contact-id'], 'self' => false];
2609                         }
2610                         DBA::update('contact', ['failed' => false, 'success_update' => $arr['received'], 'last-item' => $arr['received']], $condition);
2611                 }
2612                 // Now do the same for the system wide contacts with uid=0
2613                 if ($arr['private'] != self::PRIVATE) {
2614                         DBA::update('contact', ['failed' => false, 'success_update' => $arr['received'], 'last-item' => $arr['received']],
2615                                 ['id' => $arr['owner-id']]);
2616
2617                         if ($arr['owner-id'] != $arr['author-id']) {
2618                                 DBA::update('contact', ['failed' => false, 'success_update' => $arr['received'], 'last-item' => $arr['received']],
2619                                         ['id' => $arr['author-id']]);
2620                         }
2621                 }
2622         }
2623
2624         public static function setHashtags($body)
2625         {
2626                 $body = BBCode::performWithEscapedTags($body, ['noparse', 'pre', 'code'], function ($body) {
2627                         $tags = BBCode::getTags($body);
2628
2629                         // No hashtags?
2630                         if (!count($tags)) {
2631                                 return $body;
2632                         }
2633
2634                         // This sorting is important when there are hashtags that are part of other hashtags
2635                         // Otherwise there could be problems with hashtags like #test and #test2
2636                         // Because of this we are sorting from the longest to the shortest tag.
2637                         usort($tags, function ($a, $b) {
2638                                 return strlen($b) <=> strlen($a);
2639                         });
2640
2641                         $URLSearchString = "^\[\]";
2642
2643                         // All hashtags should point to the home server if "local_tags" is activated
2644                         if (DI::config()->get('system', 'local_tags')) {
2645                                 $body = preg_replace("/#\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",
2646                                         "#[url=" . DI::baseUrl() . "/search?tag=$2]$2[/url]", $body);
2647                         }
2648
2649                         // mask hashtags inside of url, bookmarks and attachments to avoid urls in urls
2650                         $body = preg_replace_callback("/\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",
2651                                 function ($match) {
2652                                         return ("[url=" . str_replace("#", "&num;", $match[1]) . "]" . str_replace("#", "&num;", $match[2]) . "[/url]");
2653                                 }, $body);
2654
2655                         $body = preg_replace_callback("/\[bookmark\=([$URLSearchString]*)\](.*?)\[\/bookmark\]/ism",
2656                                 function ($match) {
2657                                         return ("[bookmark=" . str_replace("#", "&num;", $match[1]) . "]" . str_replace("#", "&num;", $match[2]) . "[/bookmark]");
2658                                 }, $body);
2659
2660                         $body = preg_replace_callback("/\[attachment (.*)\](.*?)\[\/attachment\]/ism",
2661                                 function ($match) {
2662                                         return ("[attachment " . str_replace("#", "&num;", $match[1]) . "]" . $match[2] . "[/attachment]");
2663                                 }, $body);
2664
2665                         // Repair recursive urls
2666                         $body = preg_replace("/&num;\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",
2667                                 "&num;$2", $body);
2668
2669                         foreach ($tags as $tag) {
2670                                 if ((strpos($tag, '#') !== 0) || strpos($tag, '[url=') || strlen($tag) < 2 || $tag[1] == '#') {
2671                                         continue;
2672                                 }
2673
2674                                 $basetag = str_replace('_', ' ', substr($tag, 1));
2675                                 $newtag = '#[url=' . DI::baseUrl() . '/search?tag=' . $basetag . ']' . $basetag . '[/url]';
2676
2677                                 $body = str_replace($tag, $newtag, $body);
2678                         }
2679
2680                         // Convert back the masked hashtags
2681                         $body = str_replace("&num;", "#", $body);
2682
2683                         return $body;
2684                 });
2685
2686                 return $body;
2687         }
2688
2689         /**
2690          * look for mention tags and setup a second delivery chain for forum/community posts if appropriate
2691          *
2692          * @param int $uid
2693          * @param int $item_id
2694          * @return boolean true if item was deleted, else false
2695          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
2696          * @throws \ImagickException
2697          */
2698         private static function tagDeliver($uid, $item_id)
2699         {
2700                 $mention = false;
2701
2702                 $user = DBA::selectFirst('user', [], ['uid' => $uid]);
2703                 if (!DBA::isResult($user)) {
2704                         return false;
2705                 }
2706
2707                 $community_page = (($user['page-flags'] == User::PAGE_FLAGS_COMMUNITY) ? true : false);
2708                 $prvgroup = (($user['page-flags'] == User::PAGE_FLAGS_PRVGROUP) ? true : false);
2709
2710                 $item = self::selectFirst(self::ITEM_FIELDLIST, ['id' => $item_id]);
2711                 if (!DBA::isResult($item)) {
2712                         return false;
2713                 }
2714
2715                 $link = Strings::normaliseLink(DI::baseUrl() . '/profile/' . $user['nickname']);
2716
2717                 /*
2718                  * Diaspora uses their own hardwired link URL in @-tags
2719                  * instead of the one we supply with webfinger
2720                  */
2721                 $dlink = Strings::normaliseLink(DI::baseUrl() . '/u/' . $user['nickname']);
2722
2723                 $cnt = preg_match_all('/[\@\!]\[url\=(.*?)\](.*?)\[\/url\]/ism', $item['body'], $matches, PREG_SET_ORDER);
2724                 if ($cnt) {
2725                         foreach ($matches as $mtch) {
2726                                 if (Strings::compareLink($link, $mtch[1]) || Strings::compareLink($dlink, $mtch[1])) {
2727                                         $mention = true;
2728                                         Logger::log('mention found: ' . $mtch[2]);
2729                                 }
2730                         }
2731                 }
2732
2733                 if (!$mention) {
2734                         $tags = Tag::getByURIId($item['uri-id'], [Tag::MENTION, Tag::EXCLUSIVE_MENTION]);
2735                         foreach ($tags as $tag) {
2736                                 if (Strings::compareLink($link, $tag['url']) || Strings::compareLink($dlink, $tag['url'])) {
2737                                         $mention = true;
2738                                         DI::logger()->info('mention found in tag.', ['url' => $tag['url']]);
2739                                 }
2740                         }
2741                 }
2742
2743                 if (!$mention) {
2744                         if (($community_page || $prvgroup) &&
2745                                   !$item['wall'] && !$item['origin'] && ($item['gravity'] == GRAVITY_PARENT)) {
2746                                 Logger::info('Delete private group/communiy top-level item without mention', ['id' => $item_id, 'guid'=> $item['guid']]);
2747                                 DBA::delete('item', ['id' => $item_id]);
2748                                 return true;
2749                         }
2750                         return false;
2751                 }
2752
2753                 $arr = ['item' => $item, 'user' => $user];
2754
2755                 Hook::callAll('tagged', $arr);
2756
2757                 if (!$community_page && !$prvgroup) {
2758                         return false;
2759                 }
2760
2761                 /*
2762                  * tgroup delivery - setup a second delivery chain
2763                  * prevent delivery looping - only proceed
2764                  * if the message originated elsewhere and is a top-level post
2765                  */
2766                 if ($item['wall'] || $item['origin'] || ($item['id'] != $item['parent'])) {
2767                         return false;
2768                 }
2769
2770                 // now change this copy of the post to a forum head message and deliver to all the tgroup members
2771                 $self = DBA::selectFirst('contact', ['id', 'name', 'url', 'thumb'], ['uid' => $uid, 'self' => true]);
2772                 if (!DBA::isResult($self)) {
2773                         return false;
2774                 }
2775
2776                 $owner_id = Contact::getIdForURL($self['url']);
2777
2778                 // also reset all the privacy bits to the forum default permissions
2779
2780                 $private = ($user['allow_cid'] || $user['allow_gid'] || $user['deny_cid'] || $user['deny_gid']) ? self::PRIVATE : self::PUBLIC;
2781
2782                 $psid = PermissionSet::getIdFromACL(
2783                         $user['uid'],
2784                         $user['allow_cid'],
2785                         $user['allow_gid'],
2786                         $user['deny_cid'],
2787                         $user['deny_gid']
2788                 );
2789
2790                 $forum_mode = ($prvgroup ? 2 : 1);
2791
2792                 $fields = ['wall' => true, 'origin' => true, 'forum_mode' => $forum_mode, 'contact-id' => $self['id'],
2793                         'owner-id' => $owner_id, 'private' => $private, 'psid' => $psid];
2794                 self::update($fields, ['id' => $item_id]);
2795
2796                 Worker::add(['priority' => PRIORITY_HIGH, 'dont_fork' => true], 'Notifier', Delivery::POST, $item_id);
2797
2798                 Item::performActivity($item_id, 'announce', $uid);
2799
2800                 return false;
2801         }
2802
2803         /**
2804          * Automatically reshare the item if the "remote_self" option is selected
2805          *
2806          * @param array $item
2807          * @return void
2808          */
2809         private static function autoReshare(array $item)
2810         {
2811                 if ($item['gravity'] != GRAVITY_PARENT) {
2812                         return;
2813                 }
2814
2815                 if (!DBA::exists('contact', ['id' => $item['contact-id'], 'remote_self' => Contact::MIRROR_NATIVE_RESHARE])) {
2816                         return;
2817                 }
2818
2819                 if (!in_array($item['network'], [Protocol::ACTIVITYPUB, Protocol::DFRN])) {
2820                         return;
2821                 }
2822
2823                 Logger::info('Automatically reshare item', ['uid' => $item['uid'], 'id' => $item['id'], 'guid' => $item['guid'], 'uri-id' => $item['uri-id']]);
2824
2825                 Item::performActivity($item['id'], 'announce', $item['uid']);
2826         }
2827
2828         public static function isRemoteSelf($contact, &$datarray)
2829         {
2830                 if (!$contact['remote_self']) {
2831                         return false;
2832                 }
2833
2834                 // Prevent the forwarding of posts that are forwarded
2835                 if (!empty($datarray["extid"]) && ($datarray["extid"] == Protocol::DFRN)) {
2836                         Logger::info('Already forwarded');
2837                         return false;
2838                 }
2839
2840                 // Prevent to forward already forwarded posts
2841                 if ($datarray["app"] == DI::baseUrl()->getHostname()) {
2842                         Logger::info('Already forwarded (second test)');
2843                         return false;
2844                 }
2845
2846                 // Only forward posts
2847                 if ($datarray["verb"] != Activity::POST) {
2848                         Logger::info('No post');
2849                         return false;
2850                 }
2851
2852                 if (($contact['network'] != Protocol::FEED) && ($datarray['private'] == self::PRIVATE)) {
2853                         Logger::info('Not public');
2854                         return false;
2855                 }
2856
2857                 $datarray2 = $datarray;
2858                 Logger::info('remote-self start', ['contact' => $contact['url'], 'remote_self'=> $contact['remote_self'], 'item' => $datarray]);
2859                 if ($contact['remote_self'] == Contact::MIRROR_OWN_POST) {
2860                         $self = DBA::selectFirst('contact', ['id', 'name', 'url', 'thumb'],
2861                                         ['uid' => $contact['uid'], 'self' => true]);
2862                         if (DBA::isResult($self)) {
2863                                 $datarray['contact-id'] = $self["id"];
2864
2865                                 $datarray['owner-name'] = $self["name"];
2866                                 $datarray['owner-link'] = $self["url"];
2867                                 $datarray['owner-avatar'] = $self["thumb"];
2868
2869                                 $datarray['author-name']   = $datarray['owner-name'];
2870                                 $datarray['author-link']   = $datarray['owner-link'];
2871                                 $datarray['author-avatar'] = $datarray['owner-avatar'];
2872
2873                                 unset($datarray['edited']);
2874
2875                                 unset($datarray['network']);
2876                                 unset($datarray['owner-id']);
2877                                 unset($datarray['author-id']);
2878                         }
2879
2880                         if ($contact['network'] != Protocol::FEED) {
2881                                 $old_uri_id = $datarray["uri-id"] ?? 0;
2882                                 $datarray["guid"] = System::createUUID();
2883                                 unset($datarray["plink"]);
2884                                 $datarray["uri"] = self::newURI($contact['uid'], $datarray["guid"]);
2885                                 $datarray["uri-id"] = ItemURI::getIdByURI($datarray["uri"]);
2886                                 $datarray["extid"] = Protocol::DFRN;
2887                                 $urlpart = parse_url($datarray2['author-link']);
2888                                 $datarray["app"] = $urlpart["host"];
2889                                 if (!empty($old_uri_id)) {
2890                                         Post\Media::copy($old_uri_id, $datarray["uri-id"]);
2891                                 }
2892
2893                                 unset($datarray["parent-uri"]);
2894                                 unset($datarray["thr-parent"]);
2895                         } else {
2896                                 $datarray['private'] = self::PUBLIC;
2897                         }
2898                 }
2899
2900                 if ($contact['network'] != Protocol::FEED) {
2901                         // Store the original post
2902                         $result = self::insert($datarray2);
2903                         Logger::info('remote-self post original item', ['contact' => $contact['url'], 'result'=> $result, 'item' => $datarray2]);
2904                 } else {
2905                         $datarray["app"] = "Feed";
2906                         $result = true;
2907                 }
2908
2909                 // Trigger automatic reactions for addons
2910                 $datarray['api_source'] = true;
2911
2912                 // We have to tell the hooks who we are - this really should be improved
2913                 $_SESSION["authenticated"] = true;
2914                 $_SESSION["uid"] = $contact['uid'];
2915
2916                 return (bool)$result;
2917         }
2918
2919         /**
2920          *
2921          * @param string $s
2922          * @param int    $uid
2923          * @param array  $item
2924          * @param int    $cid
2925          * @return string
2926          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
2927          * @throws \ImagickException
2928          */
2929         public static function fixPrivatePhotos($s, $uid, $item = null, $cid = 0)
2930         {
2931                 if (DI::config()->get('system', 'disable_embedded')) {
2932                         return $s;
2933                 }
2934
2935                 Logger::info('check for photos');
2936                 $site = substr(DI::baseUrl(), strpos(DI::baseUrl(), '://'));
2937
2938                 $orig_body = $s;
2939                 $new_body = '';
2940
2941                 $img_start = strpos($orig_body, '[img');
2942                 $img_st_close = ($img_start !== false ? strpos(substr($orig_body, $img_start), ']') : false);
2943                 $img_len = ($img_start !== false ? strpos(substr($orig_body, $img_start + $img_st_close + 1), '[/img]') : false);
2944
2945                 while (($img_st_close !== false) && ($img_len !== false)) {
2946                         $img_st_close++; // make it point to AFTER the closing bracket
2947                         $image = substr($orig_body, $img_start + $img_st_close, $img_len);
2948
2949                         Logger::info('found photo', ['image' => $image]);
2950
2951                         if (stristr($image, $site . '/photo/')) {
2952                                 // Only embed locally hosted photos
2953                                 $replace = false;
2954                                 $i = basename($image);
2955                                 $i = str_replace(['.jpg', '.png', '.gif'], ['', '', ''], $i);
2956                                 $x = strpos($i, '-');
2957
2958                                 if ($x) {
2959                                         $res = substr($i, $x + 1);
2960                                         $i = substr($i, 0, $x);
2961                                         $photo = Photo::getPhotoForUser($uid, $i, $res);
2962                                         if (DBA::isResult($photo)) {
2963                                                 /*
2964                                                  * Check to see if we should replace this photo link with an embedded image
2965                                                  * 1. No need to do so if the photo is public
2966                                                  * 2. If there's a contact-id provided, see if they're in the access list
2967                                                  *    for the photo. If so, embed it.
2968                                                  * 3. Otherwise, if we have an item, see if the item permissions match the photo
2969                                                  *    permissions, regardless of order but first check to see if they're an exact
2970                                                  *    match to save some processing overhead.
2971                                                  */
2972                                                 if (self::hasPermissions($photo)) {
2973                                                         if ($cid) {
2974                                                                 $recips = self::enumeratePermissions($photo);
2975                                                                 if (in_array($cid, $recips)) {
2976                                                                         $replace = true;
2977                                                                 }
2978                                                         } elseif ($item) {
2979                                                                 if (self::samePermissions($uid, $item, $photo)) {
2980                                                                         $replace = true;
2981                                                                 }
2982                                                         }
2983                                                 }
2984                                                 if ($replace) {
2985                                                         $photo_img = Photo::getImageForPhoto($photo);
2986                                                         // If a custom width and height were specified, apply before embedding
2987                                                         if (preg_match("/\[img\=([0-9]*)x([0-9]*)\]/is", substr($orig_body, $img_start, $img_st_close), $match)) {
2988                                                                 Logger::info('scaling photo');
2989
2990                                                                 $width = intval($match[1]);
2991                                                                 $height = intval($match[2]);
2992
2993                                                                 $photo_img->scaleDown(max($width, $height));
2994                                                         }
2995
2996                                                         $data = $photo_img->asString();
2997                                                         $type = $photo_img->getType();
2998
2999                                                         Logger::info('replacing photo');
3000                                                         $image = 'data:' . $type . ';base64,' . base64_encode($data);
3001                                                         Logger::debug('replaced', ['image' => $image]);
3002                                                 }
3003                                         }
3004                                 }
3005                         }
3006
3007                         $new_body = $new_body . substr($orig_body, 0, $img_start + $img_st_close) . $image . '[/img]';
3008                         $orig_body = substr($orig_body, $img_start + $img_st_close + $img_len + strlen('[/img]'));
3009                         if ($orig_body === false) {
3010                                 $orig_body = '';
3011                         }
3012
3013                         $img_start = strpos($orig_body, '[img');
3014                         $img_st_close = ($img_start !== false ? strpos(substr($orig_body, $img_start), ']') : false);
3015                         $img_len = ($img_start !== false ? strpos(substr($orig_body, $img_start + $img_st_close + 1), '[/img]') : false);
3016                 }
3017
3018                 $new_body = $new_body . $orig_body;
3019
3020                 return $new_body;
3021         }
3022
3023         private static function hasPermissions($obj)
3024         {
3025                 return !empty($obj['allow_cid']) || !empty($obj['allow_gid']) ||
3026                         !empty($obj['deny_cid']) || !empty($obj['deny_gid']);
3027         }
3028
3029         private static function samePermissions($uid, $obj1, $obj2)
3030         {
3031                 // first part is easy. Check that these are exactly the same.
3032                 if (($obj1['allow_cid'] == $obj2['allow_cid'])
3033                         && ($obj1['allow_gid'] == $obj2['allow_gid'])
3034                         && ($obj1['deny_cid'] == $obj2['deny_cid'])
3035                         && ($obj1['deny_gid'] == $obj2['deny_gid'])) {
3036                         return true;
3037                 }
3038
3039                 // This is harder. Parse all the permissions and compare the resulting set.
3040                 $recipients1 = self::enumeratePermissions($obj1);
3041                 $recipients2 = self::enumeratePermissions($obj2);
3042                 sort($recipients1);
3043                 sort($recipients2);
3044
3045                 /// @TODO Comparison of arrays, maybe use array_diff_assoc() here?
3046                 return ($recipients1 == $recipients2);
3047         }
3048
3049         /**
3050          * Returns an array of contact-ids that are allowed to see this object
3051          *
3052          * @param array $obj        Item array with at least uid, allow_cid, allow_gid, deny_cid and deny_gid
3053          * @param bool  $check_dead Prunes unavailable contacts from the result
3054          * @return array
3055          * @throws \Exception
3056          */
3057         public static function enumeratePermissions(array $obj, bool $check_dead = false)
3058         {
3059                 $aclFormater = DI::aclFormatter();
3060
3061                 $allow_people = $aclFormater->expand($obj['allow_cid']);
3062                 $allow_groups = Group::expand($obj['uid'], $aclFormater->expand($obj['allow_gid']), $check_dead);
3063                 $deny_people  = $aclFormater->expand($obj['deny_cid']);
3064                 $deny_groups  = Group::expand($obj['uid'], $aclFormater->expand($obj['deny_gid']), $check_dead);
3065                 $recipients   = array_unique(array_merge($allow_people, $allow_groups));
3066                 $deny         = array_unique(array_merge($deny_people, $deny_groups));
3067                 $recipients   = array_diff($recipients, $deny);
3068                 return $recipients;
3069         }
3070
3071         public static function expire(int $uid, int $days, string $network = "", bool $force = false)
3072         {
3073                 if (!$uid || ($days < 1)) {
3074                         return;
3075                 }
3076
3077                 $condition = ["`uid` = ? AND NOT `deleted` AND `gravity` = ?",
3078                         $uid, GRAVITY_PARENT];
3079
3080                 /*
3081                  * $expire_network_only = save your own wall posts
3082                  * and just expire conversations started by others
3083                  */
3084                 $expire_network_only = DI::pConfig()->get($uid, 'expire', 'network_only', false);
3085
3086                 if ($expire_network_only) {
3087                         $condition[0] .= " AND NOT `wall`";
3088                 }
3089
3090                 if ($network != "") {
3091                         $condition[0] .= " AND `network` = ?";
3092                         $condition[] = $network;
3093                 }
3094
3095                 $condition[0] .= " AND `received` < UTC_TIMESTAMP() - INTERVAL ? DAY";
3096                 $condition[] = $days;
3097
3098                 $items = self::select(['file', 'resource-id', 'starred', 'type', 'id', 'post-type'], $condition);
3099
3100                 if (!DBA::isResult($items)) {
3101                         return;
3102                 }
3103
3104                 $expire_items = DI::pConfig()->get($uid, 'expire', 'items', true);
3105
3106                 // Forcing expiring of items - but not notes and marked items
3107                 if ($force) {
3108                         $expire_items = true;
3109                 }
3110
3111                 $expire_notes = DI::pConfig()->get($uid, 'expire', 'notes', true);
3112                 $expire_starred = DI::pConfig()->get($uid, 'expire', 'starred', true);
3113                 $expire_photos = DI::pConfig()->get($uid, 'expire', 'photos', false);
3114
3115                 $expired = 0;
3116
3117                 $priority = DI::config()->get('system', 'expire-notify-priority');
3118
3119                 while ($item = Item::fetch($items)) {
3120                         // don't expire filed items
3121
3122                         if (strpos($item['file'], '[') !== false) {
3123                                 continue;
3124                         }
3125
3126                         // Only expire posts, not photos and photo comments
3127
3128                         if (!$expire_photos && strlen($item['resource-id'])) {
3129                                 continue;
3130                         } elseif (!$expire_starred && intval($item['starred'])) {
3131                                 continue;
3132                         } elseif (!$expire_notes && (($item['type'] == 'note') || ($item['post-type'] == Item::PT_PERSONAL_NOTE))) {
3133                                 continue;
3134                         } elseif (!$expire_items && ($item['type'] != 'note') && ($item['post-type'] != Item::PT_PERSONAL_NOTE)) {
3135                                 continue;
3136                         }
3137
3138                         self::markForDeletionById($item['id'], $priority);
3139
3140                         ++$expired;
3141                 }
3142                 DBA::close($items);
3143                 Logger::log('User ' . $uid . ": expired $expired items; expire items: $expire_items, expire notes: $expire_notes, expire starred: $expire_starred, expire photos: $expire_photos");
3144         }
3145
3146         public static function firstPostDate($uid, $wall = false)
3147         {
3148                 $condition = ['uid' => $uid, 'wall' => $wall, 'deleted' => false, 'visible' => true, 'moderated' => false];
3149                 $params = ['order' => ['received' => false]];
3150                 $thread = DBA::selectFirst('thread', ['received'], $condition, $params);
3151                 if (DBA::isResult($thread)) {
3152                         return substr(DateTimeFormat::local($thread['received']), 0, 10);
3153                 }
3154                 return false;
3155         }
3156
3157         /**
3158          * add/remove activity to an item
3159          *
3160          * Toggle activities as like,dislike,attend of an item
3161          *
3162          * @param int $item_id
3163          * @param string $verb
3164          *            Activity verb. One of
3165          *            like, unlike, dislike, undislike, attendyes, unattendyes,
3166          *            attendno, unattendno, attendmaybe, unattendmaybe,
3167          *            announce, unannouce
3168          * @return bool
3169          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
3170          * @throws \ImagickException
3171          * @hook  'post_local_end'
3172          *            array $arr
3173          *            'post_id' => ID of posted item
3174          */
3175         public static function performActivity(int $item_id, string $verb, int $uid)
3176         {
3177                 if (empty($uid)) {
3178                         return false;
3179                 }
3180
3181                 Logger::notice('Start create activity', ['verb' => $verb, 'item' => $item_id, 'user' => $uid]);
3182
3183                 $item = self::selectFirst(self::ITEM_FIELDLIST, ['id' => $item_id]);
3184                 if (!DBA::isResult($item)) {
3185                         Logger::log('like: unknown item ' . $item_id);
3186                         return false;
3187                 }
3188
3189                 $item_uri = $item['uri'];
3190
3191                 if (!in_array($item['uid'], [0, $uid])) {
3192                         return false;
3193                 }
3194
3195                 if (!Item::exists(['uri-id' => $item['parent-uri-id'], 'uid' => $uid])) {
3196                         $stored = self::storeForUserByUriId($item['parent-uri-id'], $uid);
3197                         if (($item['parent-uri-id'] == $item['uri-id']) && !empty($stored)) {
3198                                 $item = self::selectFirst(self::ITEM_FIELDLIST, ['id' => $stored]);
3199                                 if (!DBA::isResult($item)) {
3200                                         Logger::info('Could not fetch just created item - should not happen', ['stored' => $stored, 'uid' => $uid, 'item-uri' => $item_uri]);
3201                                         return false;
3202                                 }
3203                         }
3204                 }
3205
3206                 // Retrieves the local post owner
3207                 $owner = User::getOwnerDataById($uid);
3208                 if (empty($owner)) {
3209                         Logger::info('Empty owner for user', ['uid' => $uid]);
3210                         return false;
3211                 }
3212
3213                 // Retrieve the current logged in user's public contact
3214                 $author_id = Contact::getIdForURL($owner['url']);
3215                 if (empty($author_id)) {
3216                         Logger::info('Empty public contact');
3217                         return false;
3218                 }
3219
3220                 $activity = null;
3221                 switch ($verb) {
3222                         case 'like':
3223                         case 'unlike':
3224                                 $activity = Activity::LIKE;
3225                                 break;
3226                         case 'dislike':
3227                         case 'undislike':
3228                                 $activity = Activity::DISLIKE;
3229                                 break;
3230                         case 'attendyes':
3231                         case 'unattendyes':
3232                                 $activity = Activity::ATTEND;
3233                                 break;
3234                         case 'attendno':
3235                         case 'unattendno':
3236                                 $activity = Activity::ATTENDNO;
3237                                 break;
3238                         case 'attendmaybe':
3239                         case 'unattendmaybe':
3240                                 $activity = Activity::ATTENDMAYBE;
3241                                 break;
3242                         case 'follow':
3243                         case 'unfollow':
3244                                 $activity = Activity::FOLLOW;
3245                                 break;
3246                         case 'announce':
3247                         case 'unannounce':
3248                                 $activity = Activity::ANNOUNCE;
3249                                 break;
3250                         default:
3251                                 Logger::notice('unknown verb', ['verb' => $verb, 'item' => $item_id]);
3252                                 return false;
3253                 }
3254
3255                 $mode = Strings::startsWith($verb, 'un') ? 'delete' : 'create';
3256
3257                 // Enable activity toggling instead of on/off
3258                 $event_verb_flag = $activity === Activity::ATTEND || $activity === Activity::ATTENDNO || $activity === Activity::ATTENDMAYBE;
3259
3260                 // Look for an existing verb row
3261                 // Event participation activities are mutually exclusive, only one of them can exist at all times.
3262                 if ($event_verb_flag) {
3263                         $verbs = [Activity::ATTEND, Activity::ATTENDNO, Activity::ATTENDMAYBE];
3264
3265                         // Translate to the index based activity index
3266                         $vids = [];
3267                         foreach ($verbs as $verb) {
3268                                 $vids[] = Verb::getID($verb);
3269                         }
3270                 } else {
3271                         $vids = Verb::getID($activity);
3272                 }
3273
3274                 $condition = ['vid' => $vids, 'deleted' => false, 'gravity' => GRAVITY_ACTIVITY,
3275                         'author-id' => $author_id, 'uid' => $item['uid'], 'thr-parent' => $item_uri];
3276                 $like_item = self::selectFirst(['id', 'guid', 'verb'], $condition);
3277
3278                 if (DBA::isResult($like_item)) {
3279                         /**
3280                          * Truth table for existing activities
3281                          *
3282                          * |          Inputs            ||      Outputs      |
3283                          * |----------------------------||-------------------|
3284                          * |  Mode  | Event | Same verb || Delete? | Return? |
3285                          * |--------|-------|-----------||---------|---------|
3286                          * | create |  Yes  |    Yes    ||   No    |   Yes   |
3287                          * | create |  Yes  |    No     ||   Yes   |   No    |
3288                          * | create |  No   |    Yes    ||   No    |   Yes   |
3289                          * | create |  No   |    No     ||        N/A†       |
3290                          * | delete |  Yes  |    Yes    ||   Yes   |   N/A‡  |
3291                          * | delete |  Yes  |    No     ||   No    |   N/A‡  |
3292                          * | delete |  No   |    Yes    ||   Yes   |   N/A‡  |
3293                          * | delete |  No   |    No     ||        N/A†       |
3294                          * |--------|-------|-----------||---------|---------|
3295                          * |   A    |   B   |     C     || A xor C | !B or C |
3296                          *
3297                          * † Can't happen: It's impossible to find an existing non-event activity without
3298                          *                 the same verb because we are only looking for this single verb.
3299                          *
3300                          * ‡ The "mode = delete" is returning early whether an existing activity was found or not.
3301                          */
3302                         if ($mode == 'create' xor $like_item['verb'] == $activity) {
3303                                 self::markForDeletionById($like_item['id']);
3304                         }
3305
3306                         if (!$event_verb_flag || $like_item['verb'] == $activity) {
3307                                 return true;
3308                         }
3309                 }
3310
3311                 // No need to go further if we aren't creating anything
3312                 if ($mode == 'delete') {
3313                         return true;
3314                 }
3315
3316                 $objtype = $item['resource-id'] ? Activity\ObjectType::IMAGE : Activity\ObjectType::NOTE;
3317
3318                 $new_item = [
3319                         'guid'          => System::createUUID(),
3320                         'uri'           => self::newURI($item['uid']),
3321                         'uid'           => $item['uid'],
3322                         'contact-id'    => $owner['id'],
3323                         'wall'          => $item['wall'],
3324                         'origin'        => 1,
3325                         'network'       => Protocol::DFRN,
3326                         'gravity'       => GRAVITY_ACTIVITY,
3327                         'parent'        => $item['id'],
3328                         'thr-parent'    => $item['uri'],
3329                         'owner-id'      => $author_id,
3330                         'author-id'     => $author_id,
3331                         'body'          => $activity,
3332                         'verb'          => $activity,
3333                         'object-type'   => $objtype,
3334                         'allow_cid'     => $item['allow_cid'],
3335                         'allow_gid'     => $item['allow_gid'],
3336                         'deny_cid'      => $item['deny_cid'],
3337                         'deny_gid'      => $item['deny_gid'],
3338                         'visible'       => 1,
3339                         'unseen'        => 1,
3340                 ];
3341
3342                 $signed = Diaspora::createLikeSignature($uid, $new_item);
3343                 if (!empty($signed)) {
3344                         $new_item['diaspora_signed_text'] = json_encode($signed);
3345                 }
3346
3347                 $new_item_id = self::insert($new_item);
3348
3349                 // If the parent item isn't visible then set it to visible
3350                 if (!$item['visible']) {
3351                         self::update(['visible' => true], ['id' => $item['id']]);
3352                 }
3353
3354                 $new_item['id'] = $new_item_id;
3355
3356                 Hook::callAll('post_local_end', $new_item);
3357
3358                 return true;
3359         }
3360
3361         private static function addThread($itemid, $onlyshadow = false)
3362         {
3363                 $fields = ['uid', 'created', 'edited', 'commented', 'received', 'changed', 'wall', 'private', 'pubmail',
3364                         'moderated', 'visible', 'starred', 'contact-id', 'post-type', 'uri-id',
3365                         'deleted', 'origin', 'forum_mode', 'mention', 'network', 'author-id', 'owner-id'];
3366                 $condition = ["`id` = ? AND (`parent` = ? OR `parent` = 0)", $itemid, $itemid];
3367                 $item = self::selectFirst($fields, $condition);
3368
3369                 if (!DBA::isResult($item)) {
3370                         return;
3371                 }
3372
3373                 $item['iid'] = $itemid;
3374
3375                 if (!$onlyshadow) {
3376                         $result = DBA::replace('thread', $item);
3377
3378                         Logger::info('Add thread', ['item' => $itemid, 'result' => $result]);
3379                 }
3380         }
3381
3382         private static function updateThread($itemid, $setmention = false)
3383         {
3384                 $fields = ['uid', 'guid', 'created', 'edited', 'commented', 'received', 'changed', 'post-type',
3385                         'wall', 'private', 'pubmail', 'moderated', 'visible', 'starred', 'contact-id', 'uri-id',
3386                         'deleted', 'origin', 'forum_mode', 'network', 'author-id', 'owner-id'];
3387
3388                 $item = self::selectFirst($fields, ['id' => $itemid, 'gravity' => GRAVITY_PARENT]);
3389                 if (!DBA::isResult($item)) {
3390                         return;
3391                 }
3392
3393                 if ($setmention) {
3394                         $item["mention"] = 1;
3395                 }
3396
3397                 $fields = [];
3398
3399                 foreach ($item as $field => $data) {
3400                         if (!in_array($field, ["guid"])) {
3401                                 $fields[$field] = $data;
3402                         }
3403                 }
3404
3405                 $result = DBA::update('thread', $fields, ['iid' => $itemid]);
3406
3407                 Logger::info('Update thread', ['item' => $itemid, 'guid' => $item["guid"], 'result' => $result]);
3408         }
3409
3410         private static function deleteThread($itemid, $itemuri = "")
3411         {
3412                 $item = DBA::selectFirst('thread', ['uid'], ['iid' => $itemid]);
3413                 if (!DBA::isResult($item)) {
3414                         Logger::info('No thread found', ['id' => $itemid]);
3415                         return;
3416                 }
3417
3418                 $result = DBA::delete('thread', ['iid' => $itemid], ['cascade' => false]);
3419
3420                 Logger::info('Deleted thread', ['item' => $itemid, 'result' => $result]);
3421
3422                 if ($itemuri != "") {
3423                         $condition = ["`uri` = ? AND NOT `deleted` AND NOT (`uid` IN (?, 0))", $itemuri, $item["uid"]];
3424                         if (!self::exists($condition)) {
3425                                 DBA::delete('item', ['uri' => $itemuri, 'uid' => 0]);
3426                                 Logger::debug('Deleted shadow item', ['id' => $itemid, 'uri' => $itemuri]);
3427                         }
3428                 }
3429         }
3430
3431         /**
3432          * Fetch the SQL condition for the given user id
3433          *
3434          * @param integer $owner_id User ID for which the permissions should be fetched
3435          * @return array condition
3436          */
3437         public static function getPermissionsConditionArrayByUserId(int $owner_id)
3438         {
3439                 $local_user = local_user();
3440                 $remote_user = Session::getRemoteContactID($owner_id);
3441
3442                 // default permissions - anonymous user
3443                 $condition = ["`private` != ?", self::PRIVATE];
3444
3445                 if ($local_user && ($local_user == $owner_id)) {
3446                         // Profile owner - everything is visible
3447                         $condition = [];
3448                 } elseif ($remote_user) {
3449                          // Authenticated visitor - fetch the matching permissionsets
3450                         $set = PermissionSet::get($owner_id, $remote_user);
3451                         if (!empty($set)) {
3452                                 $condition = ["(`private` != ? OR (`private` = ? AND `wall`
3453                                         AND `psid` IN (" . implode(', ', array_fill(0, count($set), '?')) . ")))",
3454                                         Item::PRIVATE, Item::PRIVATE];
3455                                 $condition = array_merge($condition, $set);
3456                         }
3457                 }
3458
3459                 return $condition;
3460         }
3461
3462         public static function getPermissionsSQLByUserId($owner_id)
3463         {
3464                 $local_user = local_user();
3465                 $remote_user = Session::getRemoteContactID($owner_id);
3466
3467                 /*
3468                  * Construct permissions
3469                  *
3470                  * default permissions - anonymous user
3471                  */
3472                 $sql = sprintf(" AND `item`.`private` != %d", self::PRIVATE);
3473
3474                 // Profile owner - everything is visible
3475                 if ($local_user && ($local_user == $owner_id)) {
3476                         $sql = '';
3477                 } elseif ($remote_user) {
3478                         /*
3479                          * Authenticated visitor. Unless pre-verified,
3480                          * check that the contact belongs to this $owner_id
3481                          * and load the groups the visitor belongs to.
3482                          * If pre-verified, the caller is expected to have already
3483                          * done this and passed the groups into this function.
3484                          */
3485                         $set = PermissionSet::get($owner_id, $remote_user);
3486
3487                         if (!empty($set)) {
3488                                 $sql_set = sprintf(" OR (`item`.`private` = %d AND `item`.`wall` AND `item`.`psid` IN (", self::PRIVATE) . implode(',', $set) . "))";
3489                         } else {
3490                                 $sql_set = '';
3491                         }
3492
3493                         $sql = sprintf(" AND (`item`.`private` != %d", self::PRIVATE) . $sql_set . ")";
3494                 }
3495
3496                 return $sql;
3497         }
3498
3499         /**
3500          * get translated item type
3501          *
3502          * @param $item
3503          * @return string
3504          */
3505         public static function postType($item)
3506         {
3507                 if (!empty($item['event-id'])) {
3508                         return DI::l10n()->t('event');
3509                 } elseif (!empty($item['resource-id'])) {
3510                         return DI::l10n()->t('photo');
3511                 } elseif ($item['gravity'] == GRAVITY_ACTIVITY) {
3512                         return DI::l10n()->t('activity');
3513                 } elseif ($item['gravity'] == GRAVITY_COMMENT) {
3514                         return DI::l10n()->t('comment');
3515                 }
3516
3517                 return DI::l10n()->t('post');
3518         }
3519
3520         /**
3521          * Sets the "rendered-html" field of the provided item
3522          *
3523          * Body is preserved to avoid side-effects as we modify it just-in-time for spoilers and private image links
3524          *
3525          * @param array $item
3526          * @param bool  $update
3527          *
3528          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
3529          * @todo Remove reference, simply return "rendered-html" and "rendered-hash"
3530          */
3531         public static function putInCache(&$item, $update = false)
3532         {
3533                 // Save original body to prevent addons to modify it
3534                 $body = $item['body'];
3535
3536                 $rendered_hash = $item['rendered-hash'] ?? '';
3537                 $rendered_html = $item['rendered-html'] ?? '';
3538
3539                 if ($rendered_hash == ''
3540                         || $rendered_html == ''
3541                         || $rendered_hash != hash('md5', BBCode::VERSION . '::' . $body)
3542                         || DI::config()->get('system', 'ignore_cache')
3543                 ) {
3544                         self::addRedirToImageTags($item);
3545
3546                         $item['rendered-html'] = BBCode::convert($item['body']);
3547                         $item['rendered-hash'] = hash('md5', BBCode::VERSION . '::' . $body);
3548
3549                         $hook_data = ['item' => $item, 'rendered-html' => $item['rendered-html'], 'rendered-hash' => $item['rendered-hash']];
3550                         Hook::callAll('put_item_in_cache', $hook_data);
3551                         $item['rendered-html'] = $hook_data['rendered-html'];
3552                         $item['rendered-hash'] = $hook_data['rendered-hash'];
3553                         unset($hook_data);
3554
3555                         // Force an update if the generated values differ from the existing ones
3556                         if ($rendered_hash != $item['rendered-hash']) {
3557                                 $update = true;
3558                         }
3559
3560                         // Only compare the HTML when we forcefully ignore the cache
3561                         if (DI::config()->get('system', 'ignore_cache') && ($rendered_html != $item['rendered-html'])) {
3562                                 $update = true;
3563                         }
3564
3565                         if ($update && !empty($item['id'])) {
3566                                 self::update(
3567                                         [
3568                                                 'rendered-html' => $item['rendered-html'],
3569                                                 'rendered-hash' => $item['rendered-hash']
3570                                         ],
3571                                         ['id' => $item['id']]
3572                                 );
3573                         }
3574                 }
3575
3576                 $item['body'] = $body;
3577         }
3578
3579         /**
3580          * Find any non-embedded images in private items and add redir links to them
3581          *
3582          * @param array &$item The field array of an item row
3583          */
3584         private static function addRedirToImageTags(array &$item)
3585         {
3586                 $app = DI::app();
3587
3588                 $matches = [];
3589                 $cnt = preg_match_all('|\[img\](http[^\[]*?/photo/[a-fA-F0-9]+?(-[0-9]\.[\w]+?)?)\[\/img\]|', $item['body'], $matches, PREG_SET_ORDER);
3590                 if ($cnt) {
3591                         foreach ($matches as $mtch) {
3592                                 if (strpos($mtch[1], '/redir') !== false) {
3593                                         continue;
3594                                 }
3595
3596                                 if ((local_user() == $item['uid']) && ($item['private'] == self::PRIVATE) && ($item['contact-id'] != $app->contact['id']) && ($item['network'] == Protocol::DFRN)) {
3597                                         $img_url = 'redir/' . $item['contact-id'] . '?url=' . urlencode($mtch[1]);
3598                                         $item['body'] = str_replace($mtch[0], '[img]' . $img_url . '[/img]', $item['body']);
3599                                 }
3600                         }
3601                 }
3602         }
3603
3604         /**
3605          * Given an item array, convert the body element from bbcode to html and add smilie icons.
3606          * If attach is true, also add icons for item attachments.
3607          *
3608          * @param array   $item
3609          * @param boolean $attach
3610          * @param boolean $is_preview
3611          * @return string item body html
3612          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
3613          * @throws \ImagickException
3614          * @hook  prepare_body_init item array before any work
3615          * @hook  prepare_body_content_filter ('item'=>item array, 'filter_reasons'=>string array) before first bbcode to html
3616          * @hook  prepare_body ('item'=>item array, 'html'=>body string, 'is_preview'=>boolean, 'filter_reasons'=>string array) after first bbcode to html
3617          * @hook  prepare_body_final ('item'=>item array, 'html'=>body string) after attach icons and blockquote special case handling (spoiler, author)
3618          */
3619         public static function prepareBody(array &$item, $attach = false, $is_preview = false)
3620         {
3621                 $a = DI::app();
3622                 Hook::callAll('prepare_body_init', $item);
3623
3624                 // In order to provide theme developers more possibilities, event items
3625                 // are treated differently.
3626                 if ($item['object-type'] === Activity\ObjectType::EVENT && isset($item['event-id'])) {
3627                         $ev = Event::getItemHTML($item);
3628                         return $ev;
3629                 }
3630
3631                 $tags = Tag::populateFromItem($item);
3632
3633                 $item['tags'] = $tags['tags'];
3634                 $item['hashtags'] = $tags['hashtags'];
3635                 $item['mentions'] = $tags['mentions'];
3636
3637                 // Compile eventual content filter reasons
3638                 $filter_reasons = [];
3639                 if (!$is_preview && public_contact() != $item['author-id']) {
3640                         if (!empty($item['content-warning']) && (!local_user() || !DI::pConfig()->get(local_user(), 'system', 'disable_cw', false))) {
3641                                 $filter_reasons[] = DI::l10n()->t('Content warning: %s', $item['content-warning']);
3642                         }
3643
3644                         $hook_data = [
3645                                 'item' => $item,
3646                                 'filter_reasons' => $filter_reasons
3647                         ];
3648                         Hook::callAll('prepare_body_content_filter', $hook_data);
3649                         $filter_reasons = $hook_data['filter_reasons'];
3650                         unset($hook_data);
3651                 }
3652
3653                 // Update the cached values if there is no "zrl=..." on the links.
3654                 $update = (!Session::isAuthenticated() && ($item["uid"] == 0));
3655
3656                 // Or update it if the current viewer is the intented viewer.
3657                 if (($item["uid"] == local_user()) && ($item["uid"] != 0)) {
3658                         $update = true;
3659                 }
3660
3661                 self::putInCache($item, $update);
3662                 $s = $item["rendered-html"];
3663
3664                 $hook_data = [
3665                         'item' => $item,
3666                         'html' => $s,
3667                         'preview' => $is_preview,
3668                         'filter_reasons' => $filter_reasons
3669                 ];
3670                 Hook::callAll('prepare_body', $hook_data);
3671                 $s = $hook_data['html'];
3672                 unset($hook_data);
3673
3674                 if (!$attach) {
3675                         // Replace the blockquotes with quotes that are used in mails.
3676                         $mailquote = '<blockquote type="cite" class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">';
3677                         $s = str_replace(['<blockquote>', '<blockquote class="spoiler">', '<blockquote class="author">'], [$mailquote, $mailquote, $mailquote], $s);
3678                         return $s;
3679                 }
3680
3681                 $as = '';
3682                 $vhead = false;
3683                 foreach (Post\Media::getByURIId($item['uri-id'], [Post\Media::DOCUMENT, Post\Media::TORRENT, Post\Media::UNKNOWN]) as $attachment) {
3684                         $mime = $attachment['mimetype'];
3685
3686                         $the_url = Contact::magicLinkById($item['author-id'], $attachment['url']);
3687
3688                         if (strpos($mime, 'video') !== false) {
3689                                 if (!$vhead) {
3690                                         $vhead = true;
3691                                         DI::page()['htmlhead'] .= Renderer::replaceMacros(Renderer::getMarkupTemplate('videos_head.tpl'));
3692                                 }
3693
3694                                 $as .= Renderer::replaceMacros(Renderer::getMarkupTemplate('video_top.tpl'), [
3695                                         '$video' => [
3696                                                 'id'     => $item['author-id'],
3697                                                 'title'  => DI::l10n()->t('View Video'),
3698                                                 'src'    => $the_url,
3699                                                 'mime'   => $mime,
3700                                         ],
3701                                 ]);
3702                         }
3703
3704                         $filetype = strtolower(substr($mime, 0, strpos($mime, '/')));
3705                         if ($filetype) {
3706                                 $filesubtype = strtolower(substr($mime, strpos($mime, '/') + 1));
3707                                 $filesubtype = str_replace('.', '-', $filesubtype);
3708                         } else {
3709                                 $filetype = 'unkn';
3710                                 $filesubtype = 'unkn';
3711                         }
3712
3713                         $title = Strings::escapeHtml(trim(($attachment['description'] ?? '') ?: $attachment['url']));
3714                         $title .= ' ' . ($attachment['size'] ?? 0) . ' ' . DI::l10n()->t('bytes');
3715
3716                         $icon = '<div class="attachtype icon s22 type-' . $filetype . ' subtype-' . $filesubtype . '"></div>';
3717                         $as .= '<a href="' . strip_tags($the_url) . '" title="' . $title . '" class="attachlink" target="_blank" rel="noopener noreferrer" >' . $icon . '</a>';
3718                 }
3719
3720                 if ($as != '') {
3721                         $s .= '<div class="body-attach">'.$as.'<div class="clear"></div></div>';
3722                 }
3723
3724                 // Map.
3725                 if (strpos($s, '<div class="map">') !== false && !empty($item['coord'])) {
3726                         $x = Map::byCoordinates(trim($item['coord']));
3727                         if ($x) {
3728                                 $s = preg_replace('/\<div class\=\"map\"\>/', '$0' . $x, $s);
3729                         }
3730                 }
3731
3732                 // Replace friendica image url size with theme preference.
3733                 if (!empty($a->theme_info['item_image_size'])) {
3734                         $ps = $a->theme_info['item_image_size'];
3735                         $s = preg_replace('|(<img[^>]+src="[^"]+/photo/[0-9a-f]+)-[0-9]|', "$1-" . $ps, $s);
3736                 }
3737
3738                 $s = HTML::applyContentFilter($s, $filter_reasons);
3739
3740                 $hook_data = ['item' => $item, 'html' => $s];
3741                 Hook::callAll('prepare_body_final', $hook_data);
3742
3743                 return $hook_data['html'];
3744         }
3745
3746         /**
3747          * get private link for item
3748          *
3749          * @param array $item
3750          * @return boolean|array False if item has not plink, otherwise array('href'=>plink url, 'title'=>translated title)
3751          * @throws \Exception
3752          */
3753         public static function getPlink($item)
3754         {
3755                 if (local_user()) {
3756                         $ret = [
3757                                 'href' => "display/" . $item['guid'],
3758                                 'orig' => "display/" . $item['guid'],
3759                                 'title' => DI::l10n()->t('View on separate page'),
3760                                 'orig_title' => DI::l10n()->t('view on separate page'),
3761                         ];
3762
3763                         if (!empty($item['plink'])) {
3764                                 $ret["href"] = DI::baseUrl()->remove($item['plink']);
3765                                 $ret["title"] = DI::l10n()->t('link to source');
3766                         }
3767                 } elseif (!empty($item['plink']) && ($item['private'] != self::PRIVATE)) {
3768                         $ret = [
3769                                 'href' => $item['plink'],
3770                                 'orig' => $item['plink'],
3771                                 'title' => DI::l10n()->t('link to source'),
3772                         ];
3773                 } else {
3774                         $ret = [];
3775                 }
3776
3777                 return $ret;
3778         }
3779
3780         /**
3781          * Is the given item array a post that is sent as starting post to a forum?
3782          *
3783          * @param array $item
3784          * @param array $owner
3785          *
3786          * @return boolean "true" when it is a forum post
3787          */
3788         public static function isForumPost(array $item, array $owner = [])
3789         {
3790                 if (empty($owner)) {
3791                         $owner = User::getOwnerDataById($item['uid']);
3792                         if (empty($owner)) {
3793                                 return false;
3794                         }
3795                 }
3796
3797                 if (($item['author-id'] == $item['owner-id']) ||
3798                         ($owner['id'] == $item['contact-id']) ||
3799                         ($item['uri'] != $item['parent-uri']) ||
3800                         $item['origin']) {
3801                         return false;
3802                 }
3803
3804                 return Contact::isForum($item['contact-id']);
3805         }
3806
3807         /**
3808          * Search item id for given URI or plink
3809          *
3810          * @param string $uri
3811          * @param integer $uid
3812          *
3813          * @return integer item id
3814          */
3815         public static function searchByLink($uri, $uid = 0)
3816         {
3817                 $ssl_uri = str_replace('http://', 'https://', $uri);
3818                 $uris = [$uri, $ssl_uri, Strings::normaliseLink($uri)];
3819
3820                 $item = DBA::selectFirst('item', ['id'], ['uri' => $uris, 'uid' => $uid]);
3821                 if (DBA::isResult($item)) {
3822                         return $item['id'];
3823                 }
3824
3825                 $itemcontent = DBA::selectFirst('item-content', ['uri-id'], ['plink' => $uris]);
3826                 if (!DBA::isResult($itemcontent)) {
3827                         return 0;
3828                 }
3829
3830                 $itemuri = DBA::selectFirst('item-uri', ['uri'], ['id' => $itemcontent['uri-id']]);
3831                 if (!DBA::isResult($itemuri)) {
3832                         return 0;
3833                 }
3834
3835                 $item = DBA::selectFirst('item', ['id'], ['uri' => $itemuri['uri'], 'uid' => $uid]);
3836                 if (DBA::isResult($item)) {
3837                         return $item['id'];
3838                 }
3839
3840                 return 0;
3841         }
3842
3843         /**
3844          * Return the URI for a link to the post
3845          *
3846          * @param string $uri URI or link to post
3847          *
3848          * @return string URI
3849          */
3850         public static function getURIByLink(string $uri)
3851         {
3852                 $ssl_uri = str_replace('http://', 'https://', $uri);
3853                 $uris = [$uri, $ssl_uri, Strings::normaliseLink($uri)];
3854
3855                 $item = DBA::selectFirst('item', ['uri'], ['uri' => $uris]);
3856                 if (DBA::isResult($item)) {
3857                         return $item['uri'];
3858                 }
3859
3860                 $itemcontent = DBA::selectFirst('item-content', ['uri-id'], ['plink' => $uris]);
3861                 if (!DBA::isResult($itemcontent)) {
3862                         return '';
3863                 }
3864
3865                 $itemuri = DBA::selectFirst('item-uri', ['uri'], ['id' => $itemcontent['uri-id']]);
3866                 if (DBA::isResult($itemuri)) {
3867                         return $itemuri['uri'];
3868                 }
3869
3870                 return '';
3871         }
3872
3873         /**
3874          * Fetches item for given URI or plink
3875          *
3876          * @param string $uri
3877          * @param integer $uid
3878          *
3879          * @return integer item id
3880          */
3881         public static function fetchByLink(string $uri, int $uid = 0)
3882         {
3883                 Logger::info('Trying to fetch link', ['uid' => $uid, 'uri' => $uri]);
3884                 $item_id = self::searchByLink($uri, $uid);
3885                 if (!empty($item_id)) {
3886                         Logger::info('Link found', ['uid' => $uid, 'uri' => $uri, 'id' => $item_id]);
3887                         return $item_id;
3888                 }
3889
3890                 if ($fetched_uri = ActivityPub\Processor::fetchMissingActivity($uri)) {
3891                         $item_id = self::searchByLink($fetched_uri, $uid);
3892                 } else {
3893                         $item_id = Diaspora::fetchByURL($uri);
3894                 }
3895
3896                 if (!empty($item_id)) {
3897                         Logger::info('Link fetched', ['uid' => $uid, 'uri' => $uri, 'id' => $item_id]);
3898                         return $item_id;
3899                 }
3900
3901                 Logger::info('Link not found', ['uid' => $uid, 'uri' => $uri]);
3902                 return 0;
3903         }
3904
3905         /**
3906          * Return share data from an item array (if the item is shared item)
3907          * We are providing the complete Item array, because at some time in the future
3908          * we hopefully will define these values not in the body anymore but in some item fields.
3909          * This function is meant to replace all similar functions in the system.
3910          *
3911          * @param array $item
3912          *
3913          * @return array with share information
3914          */
3915         public static function getShareArray($item)
3916         {
3917                 if (!preg_match("/(.*?)\[share(.*?)\]\s?(.*?)\s?\[\/share\]\s?/ism", $item['body'], $matches)) {
3918                         return [];
3919                 }
3920
3921                 $attribute_string = $matches[2];
3922                 $attributes = ['comment' => trim($matches[1]), 'shared' => trim($matches[3])];
3923                 foreach (['author', 'profile', 'avatar', 'guid', 'posted', 'link'] as $field) {
3924                         if (preg_match("/$field=(['\"])(.+?)\\1/ism", $attribute_string, $matches)) {
3925                                 $attributes[$field] = trim(html_entity_decode($matches[2] ?? '', ENT_QUOTES, 'UTF-8'));
3926                         }
3927                 }
3928                 return $attributes;
3929         }
3930
3931         /**
3932          * Fetch item information for shared items from the original items and adds it.
3933          *
3934          * @param array $item
3935          *
3936          * @return array item array with data from the original item
3937          */
3938         public static function addShareDataFromOriginal(array $item)
3939         {
3940                 $shared = self::getShareArray($item);
3941                 if (empty($shared)) {
3942                         return $item;
3943                 }
3944
3945                 // Real reshares always have got a GUID.
3946                 if (empty($shared['guid'])) {
3947                         return $item;
3948                 }
3949
3950                 $uid = $item['uid'] ?? 0;
3951
3952                 // first try to fetch the item via the GUID. This will work for all reshares that had been created on this system
3953                 $shared_item = self::selectFirst(['title', 'body'], ['guid' => $shared['guid'], 'uid' => [0, $uid]]);
3954                 if (!DBA::isResult($shared_item)) {
3955                         if (empty($shared['link'])) {
3956                                 return $item;
3957                         }
3958
3959                         // Otherwhise try to find (and possibly fetch) the item via the link. This should work for Diaspora and ActivityPub posts
3960                         $id = self::fetchByLink($shared['link'] ?? '', $uid);
3961                         if (empty($id)) {
3962                                 Logger::info('Original item not found', ['url' => $shared['link'] ?? '', 'callstack' => System::callstack()]);
3963                                 return $item;
3964                         }
3965
3966                         $shared_item = self::selectFirst(['title', 'body'], ['id' => $id]);
3967                         if (!DBA::isResult($shared_item)) {
3968                                 return $item;
3969                         }
3970                         Logger::info('Got shared data from url', ['url' => $shared['link'], 'callstack' => System::callstack()]);
3971                 } else {
3972                         Logger::info('Got shared data from guid', ['guid' => $shared['guid'], 'callstack' => System::callstack()]);
3973                 }
3974
3975                 if (!empty($shared_item['title'])) {
3976                         $body = '[h3]' . $shared_item['title'] . "[/h3]\n" . $shared_item['body'];
3977                         unset($shared_item['title']);
3978                 } else {
3979                         $body = $shared_item['body'];
3980                 }
3981
3982                 $item['body'] = preg_replace("/\[share ([^\[\]]*)\].*\[\/share\]/ism", '[share $1]' . $body . '[/share]', $item['body']);
3983                 unset($shared_item['body']);
3984
3985                 return array_merge($item, $shared_item);
3986         }
3987
3988         /**
3989          * Check a prospective item array against user-level permissions
3990          *
3991          * @param array $item Expected keys: uri, gravity, and
3992          *                    author-link if is author-id is set,
3993          *                    owner-link if is owner-id is set,
3994          *                    causer-link if is causer-id is set.
3995          * @param int   $user_id Local user ID
3996          * @return bool
3997          * @throws \Exception
3998          */
3999         protected static function isAllowedByUser(array $item, int $user_id)
4000         {
4001                 if (!empty($item['author-id']) && Contact\User::isBlocked($item['author-id'], $user_id)) {
4002                         Logger::notice('Author is blocked by user', ['author-link' => $item['author-link'], 'uid' => $user_id, 'item-uri' => $item['uri']]);
4003                         return false;
4004                 }
4005
4006                 if (!empty($item['owner-id']) && Contact\User::isBlocked($item['owner-id'], $user_id)) {
4007                         Logger::notice('Owner is blocked by user', ['owner-link' => $item['owner-link'], 'uid' => $user_id, 'item-uri' => $item['uri']]);
4008                         return false;
4009                 }
4010
4011                 // The causer is set during a thread completion, for example because of a reshare. It countains the responsible actor.
4012                 if (!empty($item['causer-id']) && Contact\User::isBlocked($item['causer-id'], $user_id)) {
4013                         Logger::notice('Causer is blocked by user', ['causer-link' => $item['causer-link'] ?? $item['causer-id'], 'uid' => $user_id, 'item-uri' => $item['uri']]);
4014                         return false;
4015                 }
4016
4017                 if (!empty($item['causer-id']) && ($item['gravity'] === GRAVITY_PARENT) && Contact\User::isIgnored($item['causer-id'], $user_id)) {
4018                         Logger::notice('Causer is ignored by user', ['causer-link' => $item['causer-link'] ?? $item['causer-id'], 'uid' => $user_id, 'item-uri' => $item['uri']]);
4019                         return false;
4020                 }
4021
4022                 return true;
4023         }
4024 }