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