src/Model/Item.php

   1 <?php
   2 /**
   3  * @copyright Copyright (C) 2020, Friendica
   4  *
   5  * @license GNU AGPL version 3 or any later version
   6  *
   7  * This program is free software: you can redistribute it and/or modify
   8  * it under the terms of the GNU Affero General Public License as
   9  * published by the Free Software Foundation, either version 3 of the
  10  * License, or (at your option) any later version.
  11  *
  12  * This program is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  * GNU Affero General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU Affero General Public License
  18  * along with this program.  If not, see <https://www.gnu.org/licenses/>.
  19  *
  20  */
  21
  22 namespace Friendica\Model;
  23
  24 use Friendica\Content\Text\BBCode;
  25 use Friendica\Content\Text\HTML;
  26 use Friendica\Core\Hook;
  27 use Friendica\Core\Logger;
  28 use Friendica\Core\Protocol;
  29 use Friendica\Core\Renderer;
  30 use Friendica\Core\Session;
  31 use Friendica\Core\System;
  32 use Friendica\Model\Tag;
  33 use Friendica\Core\Worker;
  34 use Friendica\Database\DBA;
  35 use Friendica\Database\DBStructure;
  36 use Friendica\DI;
  37 use Friendica\Model\Post;
  38 use Friendica\Protocol\Activity;
  39 use Friendica\Protocol\ActivityPub;
  40 use Friendica\Protocol\Diaspora;
  41 use Friendica\Util\DateTimeFormat;
  42 use Friendica\Util\Map;
  43 use Friendica\Util\Network;
  44 use Friendica\Util\Strings;
  45 use Friendica\Worker\Delivery;
  46 use Friendica\Repository\PermissionSet as RepPermissionSet;
  47 use LanguageDetection\Language;
  48
  49 class Item
  50 {
  51         // Posting types, inspired by https://www.w3.org/TR/activitystreams-vocabulary/#object-types
  52         const PT_ARTICLE = 0;
  53         const PT_NOTE = 1;
  54         const PT_PAGE = 2;
  55         const PT_IMAGE = 16;
  56         const PT_AUDIO = 17;
  57         const PT_VIDEO = 18;
  58         const PT_DOCUMENT = 19;
  59         const PT_EVENT = 32;
  60         const PT_TAG = 64;
  61         const PT_TO = 65;
  62         const PT_CC = 66;
  63         const PT_BTO = 67;
  64         const PT_BCC = 68;
  65         const PT_FOLLOWER = 69;
  66         const PT_ANNOUNCEMENT = 70;
  67         const PT_COMMENT = 71;
  68         const PT_STORED = 72;
  69         const PT_GLOBAL = 73;
  70         const PT_RELAY = 74;
  71         const PT_FETCHED = 75;
  72         const PT_PERSONAL_NOTE = 128;
  73
  74         // Field list that is used to display the items
  75         const DISPLAY_FIELDLIST = [
  76                 'uid', 'id', 'parent', 'uri-id', 'uri', 'thr-parent', 'parent-uri', 'guid', 'network', 'gravity',
  77                 'commented', 'created', 'edited', 'received', 'verb', 'object-type', 'postopts', 'plink',
  78                 'wall', 'private', 'starred', 'origin', 'title', 'body', 'file', 'language',
  79                 'content-warning', 'location', 'coord', 'app', 'rendered-hash', 'rendered-html', 'object',
  80                 'allow_cid', 'allow_gid', 'deny_cid', 'deny_gid', 'item_id',
  81                 'author-id', 'author-link', 'author-name', 'author-avatar', 'author-network',
  82                 'owner-id', 'owner-link', 'owner-name', 'owner-avatar', 'owner-network',
  83                 'causer-id', 'causer-link', 'causer-name', 'causer-avatar', 'causer-contact-type',
  84                 'contact-id', 'contact-uid', 'contact-link', 'contact-name', 'contact-avatar',
  85                 'writable', 'self', 'cid', 'alias', 'pinned',
  86                 'event-id', 'event-created', 'event-edited', 'event-start', 'event-finish',
  87                 'event-summary', 'event-desc', 'event-location', 'event-type',
  88                 'event-nofinish', 'event-adjust', 'event-ignore', 'event-id',
  89                 'delivery_queue_count', 'delivery_queue_done', 'delivery_queue_failed'
  90         ];
  91
  92         // Field list that is used to deliver items via the protocols
  93         const DELIVER_FIELDLIST = ['uid', 'id', 'parent', 'uri-id', 'uri', 'thr-parent', 'parent-uri', 'guid',
  94                         'parent-guid', 'created', 'edited', 'verb', 'object-type', 'object', 'target',
  95                         'private', 'title', 'body', 'location', 'coord', 'app',
  96                         'deleted', 'extid', 'post-type', 'gravity',
  97                         'allow_cid', 'allow_gid', 'deny_cid', 'deny_gid',
  98                         'author-id', 'author-link', 'owner-link', 'contact-uid',
  99                         'signed_text', 'signature', 'signer', 'network'];
 100
 101         // Field list for "item-content" table that is mixed with the item table
 102         const MIXED_CONTENT_FIELDLIST = ['title', 'content-warning', 'body', 'location',
 103                         'coord', 'app', 'rendered-hash', 'rendered-html', 'verb',
 104                         'object-type', 'object', 'target-type', 'target', 'plink'];
 105
 106         // Field list for "item-content" table that is not present in the "item" table
 107         const CONTENT_FIELDLIST = ['language', 'raw-body'];
 108
 109         // All fields in the item table
 110         const ITEM_FIELDLIST = ['id', 'uid', 'parent', 'uri', 'parent-uri', 'thr-parent',
 111                         'guid', 'uri-id', 'parent-uri-id', 'thr-parent-id', 'vid',
 112                         'contact-id', 'type', 'wall', 'gravity', 'extid', 'icid', 'psid',
 113                         'created', 'edited', 'commented', 'received', 'changed', 'verb',
 114                         'postopts', 'plink', 'resource-id', 'event-id', 'inform',
 115                         'file', 'allow_cid', 'allow_gid', 'deny_cid', 'deny_gid', 'post-type',
 116                         'private', 'pubmail', 'moderated', 'visible', 'starred', 'bookmark',
 117                         'unseen', 'deleted', 'origin', 'forum_mode', 'mention', 'global', 'network',
 118                         'title', 'content-warning', 'body', 'location', 'coord', 'app',
 119                         'rendered-hash', 'rendered-html', 'object-type', 'object', 'target-type', 'target',
 120                         'author-id', 'author-link', 'author-name', 'author-avatar', 'author-network',
 121                         'owner-id', 'owner-link', 'owner-name', 'owner-avatar', 'causer-id'];
 122
 123         // List of all verbs that don't need additional content data.
 124         // Never reorder or remove entries from this list. Just add new ones at the end, if needed.
 125         const ACTIVITIES = [
 126                 Activity::LIKE, Activity::DISLIKE,
 127                 Activity::ATTEND, Activity::ATTENDNO, Activity::ATTENDMAYBE,
 128                 Activity::FOLLOW,
 129                 Activity::ANNOUNCE];
 130
 131         const PUBLIC = 0;
 132         const PRIVATE = 1;
 133         const UNLISTED = 2;
 134
 135         const TABLES = ['item', 'user-item', 'item-content', 'post-delivery-data', 'diaspora-interaction'];
 136
 137         private static $legacy_mode = null;
 138
 139         private static function getItemFields()
 140         {
 141                 $definition = DBStructure::definition('', false);
 142
 143                 $postfields = [];
 144                 foreach (self::TABLES as $table) {
 145                         $postfields[$table] = array_keys($definition[$table]['fields']);
 146                 }
 147
 148                 return $postfields;
 149         }
 150
 151         public static function isLegacyMode()
 152         {
 153                 if (is_null(self::$legacy_mode)) {
 154                         self::$legacy_mode = (DI::config()->get("system", "post_update_version") < 1279);
 155                 }
 156
 157                 return self::$legacy_mode;
 158         }
 159
 160         /**
 161          * Set the pinned state of an item
 162          *
 163          * @param integer $iid    Item ID
 164          * @param integer $uid    User ID
 165          * @param boolean $pinned Pinned state
 166          */
 167         public static function setPinned(int $iid, int $uid, bool $pinned)
 168         {
 169                 DBA::update('user-item', ['pinned' => $pinned], ['iid' => $iid, 'uid' => $uid], true);
 170         }
 171
 172         /**
 173          * Get the pinned state
 174          *
 175          * @param integer $iid Item ID
 176          * @param integer $uid User ID
 177          *
 178          * @return boolean pinned state
 179          */
 180         public static function getPinned(int $iid, int $uid)
 181         {
 182                 $useritem = DBA::selectFirst('user-item', ['pinned'], ['iid' => $iid, 'uid' => $uid]);
 183                 if (!DBA::isResult($useritem)) {
 184                         return false;
 185                 }
 186                 return (bool)$useritem['pinned'];
 187         }
 188
 189         /**
 190          * Select pinned rows from the item table for a given user
 191          *
 192          * @param integer $uid       User ID
 193          * @param array   $selected  Array of selected fields, empty for all
 194          * @param array   $condition Array of fields for condition
 195          * @param array   $params    Array of several parameters
 196          *
 197          * @return boolean|object
 198          * @throws \Exception
 199          */
 200         public static function selectPinned(int $uid, array $selected = [], array $condition = [], $params = [])
 201         {
 202                 $useritems = DBA::select('user-item', ['iid'], ['uid' => $uid, 'pinned' => true]);
 203                 if (!DBA::isResult($useritems)) {
 204                         return $useritems;
 205                 }
 206
 207                 $pinned = [];
 208                 while ($useritem = DBA::fetch($useritems)) {
 209                         $pinned[] = $useritem['iid'];
 210                 }
 211                 DBA::close($useritems);
 212
 213                 if (empty($pinned)) {
 214                         return [];
 215                 }
 216
 217                 $condition = DBA::mergeConditions(['iid' => $pinned], $condition);
 218
 219                 return self::selectThreadForUser($uid, $selected, $condition, $params);
 220         }
 221
 222         /**
 223          * Fetch a single item row
 224          *
 225          * @param mixed $stmt statement object
 226          * @return array current row
 227          */
 228         public static function fetch($stmt)
 229         {
 230                 $row = DBA::fetch($stmt);
 231
 232                 if (is_bool($row)) {
 233                         return $row;
 234                 }
 235
 236                 $row = DBA::castFields('item', $row);
 237
 238                 // ---------------------- Transform item structure data ----------------------
 239
 240                 // We prefer the data from the user's contact over the public one
 241                 if (!empty($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                                 $row['file'] = Post\Category::getTextByURIId($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                 $data_fields = $fields;
 915
 916                 // To ensure the data integrity we do it in an transaction
 917                 DBA::transaction();
 918
 919                 // We cannot simply expand the condition to check for origin entries
 920                 // The condition needn't to be a simple array but could be a complex condition.
 921                 // And we have to execute this query before the update to ensure to fetch the same data.
 922                 $items = DBA::select('item', ['id', 'origin', 'uri', 'uri-id', 'icid', 'uid', 'file'], $condition);
 923
 924                 $content_fields = [];
 925                 foreach (array_merge(self::CONTENT_FIELDLIST, self::MIXED_CONTENT_FIELDLIST) as $field) {
 926                         if (isset($fields[$field])) {
 927                                 $content_fields[$field] = $fields[$field];
 928                                 if (in_array($field, self::CONTENT_FIELDLIST) || !self::isLegacyMode()) {
 929                                         unset($fields[$field]);
 930                                 } else {
 931                                         $fields[$field] = null;
 932                                 }
 933                         }
 934                 }
 935
 936                 $delivery_data = Post\DeliveryData::extractFields($fields);
 937
 938                 $clear_fields = ['bookmark', 'type', 'author-name', 'author-avatar', 'author-link', 'owner-name', 'owner-avatar', 'owner-link', 'postopts', 'inform'];
 939                 foreach ($clear_fields as $field) {
 940                         if (array_key_exists($field, $fields)) {
 941                                 $fields[$field] = null;
 942                         }
 943                 }
 944
 945                 if (array_key_exists('file', $fields)) {
 946                         $files = $fields['file'];
 947                         $fields['file'] = null;
 948                 } else {
 949                         $files = null;
 950                 }
 951
 952                 if (!empty($content_fields['verb'])) {
 953                         $fields['vid'] = Verb::getID($content_fields['verb']);
 954                 }
 955
 956                 if (!empty($fields)) {
 957                         $success = DBA::update('item', $fields, $condition);
 958
 959                         if (!$success) {
 960                                 DBA::close($items);
 961                                 DBA::rollback();
 962                                 return false;
 963                         }
 964                 }
 965
 966                 // When there is no content for the "old" item table, this will count the fetched items
 967                 $rows = DBA::affectedRows();
 968
 969                 $notify_items = [];
 970
 971                 while ($item = DBA::fetch($items)) {
 972                         Post\User::update($item['uri-id'], $item['uid'], $data_fields);
 973
 974                         if (empty($content_fields['verb']) || !in_array($content_fields['verb'], self::ACTIVITIES)) {
 975                                 if (!empty($content_fields['body'])) {
 976                                         $content_fields['raw-body'] = trim($content_fields['raw-body'] ?? $content_fields['body']);
 977
 978                                         // Remove all media attachments from the body and store them in the post-media table
 979                                         $content_fields['raw-body'] = Post\Media::insertFromBody($item['uri-id'], $content_fields['raw-body']);
 980                                         $content_fields['raw-body'] = self::setHashtags($content_fields['raw-body']);
 981                                 }
 982
 983                                 self::updateContent($content_fields, ['uri-id' => $item['uri-id']]);
 984
 985                                 if (empty($item['icid'])) {
 986                                         $item_content = DBA::selectFirst('item-content', [], ['uri-id' => $item['uri-id']]);
 987                                         if (DBA::isResult($item_content)) {
 988                                                 $item_fields = ['icid' => $item_content['id']];
 989                                                 // Clear all fields in the item table that have a content in the item-content table
 990                                                 if (self::isLegacyMode()) {
 991                                                         foreach ($item_content as $field => $content) {
 992                                                                 if (in_array($field, self::MIXED_CONTENT_FIELDLIST) && !empty($content)) {
 993                                                                         $item_fields[$field] = null;
 994                                                                 }
 995                                                         }
 996                                                 }
 997                                                 DBA::update('item', $item_fields, ['id' => $item['id']]);
 998                                         }
 999                                 }
1000                         }
1001
1002                         if (!is_null($files)) {
1003                                 Post\Category::storeTextByURIId($item['uri-id'], $item['uid'], $files);
1004                                 if (!empty($item['file'])) {
1005                                         DBA::update('item', ['file' => ''], ['id' => $item['id']]);
1006                                 }
1007                         }
1008
1009                         if (!empty($fields['attach'])) {
1010                                 Post\Media::insertFromAttachment($item['uri-id'], $fields['attach']);
1011                         }
1012
1013                         Post\DeliveryData::update($item['uri-id'], $delivery_data);
1014
1015                         self::updateThread($item['id']);
1016
1017                         // We only need to notfiy others when it is an original entry from us.
1018                         // Only call the notifier when the item has some content relevant change.
1019                         if ($item['origin'] && in_array('edited', array_keys($fields))) {
1020                                 $notify_items[] = $item['id'];
1021                         }
1022                 }
1023
1024                 DBA::close($items);
1025                 DBA::commit();
1026
1027                 foreach ($notify_items as $notify_item) {
1028                         Worker::add(PRIORITY_HIGH, "Notifier", Delivery::POST, $notify_item);
1029                 }
1030
1031                 return $rows;
1032         }
1033
1034         /**
1035          * Delete an item and notify others about it - if it was ours
1036          *
1037          * @param array   $condition The condition for finding the item entries
1038          * @param integer $priority  Priority for the notification
1039          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1040          */
1041         public static function markForDeletion($condition, $priority = PRIORITY_HIGH)
1042         {
1043                 $items = self::select(['id'], $condition);
1044                 while ($item = self::fetch($items)) {
1045                         self::markForDeletionById($item['id'], $priority);
1046                 }
1047                 DBA::close($items);
1048         }
1049
1050         /**
1051          * Delete an item for an user and notify others about it - if it was ours
1052          *
1053          * @param array   $condition The condition for finding the item entries
1054          * @param integer $uid       User who wants to delete this item
1055          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1056          */
1057         public static function deleteForUser($condition, $uid)
1058         {
1059                 if ($uid == 0) {
1060                         return;
1061                 }
1062
1063                 $items = self::select(['id', 'uid', 'uri-id'], $condition);
1064                 while ($item = self::fetch($items)) {
1065                         Post\User::update($item['uri-id'], $item['uid'], ['hidden' => true]);
1066
1067                         // "Deleting" global items just means hiding them
1068                         if ($item['uid'] == 0) {
1069                                 DBA::update('user-item', ['hidden' => true], ['iid' => $item['id'], 'uid' => $uid], true);
1070                         } elseif ($item['uid'] == $uid) {
1071                                 self::markForDeletionById($item['id'], PRIORITY_HIGH);
1072                         } else {
1073                                 Logger::log('Wrong ownership. Not deleting item ' . $item['id']);
1074                         }
1075                 }
1076                 DBA::close($items);
1077         }
1078
1079         /**
1080          * Mark an item for deletion, delete related data and notify others about it - if it was ours
1081          *
1082          * @param integer $item_id
1083          * @param integer $priority Priority for the notification
1084          *
1085          * @return boolean success
1086          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1087          */
1088         public static function markForDeletionById($item_id, $priority = PRIORITY_HIGH)
1089         {
1090                 Logger::info('Mark item for deletion by id', ['id' => $item_id, 'callstack' => System::callstack()]);
1091                 // locate item to be deleted
1092                 $fields = ['id', 'uri', 'uri-id', 'uid', 'parent', 'parent-uri', 'origin',
1093                         'deleted', 'file', 'resource-id', 'event-id',
1094                         'verb', 'object-type', 'object', 'target', 'contact-id',
1095                         'icid', 'psid', 'gravity'];
1096                 $item = self::selectFirst($fields, ['id' => $item_id]);
1097                 if (!DBA::isResult($item)) {
1098                         Logger::info('Item not found.', ['id' => $item_id]);
1099                         return false;
1100                 }
1101
1102                 if ($item['deleted']) {
1103                         Logger::info('Item has already been marked for deletion.', ['id' => $item_id]);
1104                         return false;
1105                 }
1106
1107                 $parent = self::selectFirst(['origin'], ['id' => $item['parent']]);
1108                 if (!DBA::isResult($parent)) {
1109                         $parent = ['origin' => false];
1110                 }
1111
1112                 // clean up categories and tags so they don't end up as orphans
1113
1114                 $matches = [];
1115                 $cnt = preg_match_all('/<(.*?)>/', $item['file'], $matches, PREG_SET_ORDER);
1116
1117                 if ($cnt) {
1118                         foreach ($matches as $mtch) {
1119                                 FileTag::unsaveFile($item['uid'], $item['id'], $mtch[1],true);
1120                         }
1121                 }
1122
1123                 $matches = [];
1124
1125                 $cnt = preg_match_all('/\[(.*?)\]/', $item['file'], $matches, PREG_SET_ORDER);
1126
1127                 if ($cnt) {
1128                         foreach ($matches as $mtch) {
1129                                 FileTag::unsaveFile($item['uid'], $item['id'], $mtch[1],false);
1130                         }
1131                 }
1132
1133                 /*
1134                  * If item is a link to a photo resource, nuke all the associated photos
1135                  * (visitors will not have photo resources)
1136                  * This only applies to photos uploaded from the photos page. Photos inserted into a post do not
1137                  * generate a resource-id and therefore aren't intimately linked to the item.
1138                  */
1139                 /// @TODO: this should first check if photo is used elsewhere
1140                 if (strlen($item['resource-id'])) {
1141                         Photo::delete(['resource-id' => $item['resource-id'], 'uid' => $item['uid']]);
1142                 }
1143
1144                 // If item is a link to an event, delete the event.
1145                 if (intval($item['event-id'])) {
1146                         Event::delete($item['event-id']);
1147                 }
1148
1149                 // If item has attachments, drop them
1150                 $attachments = Post\Media::getByURIId($item['uri-id'], [Post\Media::DOCUMENT]);
1151                 foreach($attachments as $attachment) {
1152                         if (preg_match("|attach/(\d+)|", $attachment['url'], $matches)) {
1153                                 Attach::delete(['id' => $matches[1], 'uid' => $item['uid']]);
1154                         }
1155                 }
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' => $item['id']]);
1160
1161                 Post\Category::storeTextByURIId($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                 // When the permission set will be used in photo and events as well,
1171                 // this query here needs to be extended.
1172                 // @todo Currently deactivated. We need the permission set in the deletion process.
1173                 // This is a reminder to add the removal somewhere else.
1174                 //if (!empty($item['psid']) && !self::exists(['psid' => $item['psid'], 'deleted' => false])) {
1175                 //      DBA::delete('permissionset', ['id' => $item['psid']], ['cascade' => false]);
1176                 //}
1177
1178                 // If it's the parent of a comment thread, kill all the kids
1179                 if ($item['gravity'] == GRAVITY_PARENT) {
1180                         self::markForDeletion(['parent' => $item['parent'], 'deleted' => false], $priority);
1181                 }
1182
1183                 // Is it our comment and/or our thread?
1184                 if (($item['origin'] || $parent['origin']) && ($item['uid'] != 0)) {
1185                         // When we delete the original post we will delete all existing copies on the server as well
1186                         self::markForDeletion(['uri' => $item['uri'], 'deleted' => false], $priority);
1187
1188                         // send the notification upstream/downstream
1189                         Worker::add(['priority' => $priority, 'dont_fork' => true], "Notifier", Delivery::DELETION, intval($item['id']));
1190                 } elseif ($item['uid'] != 0) {
1191                         Post\User::update($item['uri-id'], $item['uid'], ['hidden' => true]);
1192
1193                         // When we delete just our local user copy of an item, we have to set a marker to hide it
1194                         $global_item = self::selectFirst(['id'], ['uri' => $item['uri'], 'uid' => 0, 'deleted' => false]);
1195                         if (DBA::isResult($global_item)) {
1196                                 DBA::update('user-item', ['hidden' => true], ['iid' => $global_item['id'], 'uid' => $item['uid']], true);
1197                         }
1198                 }
1199
1200                 Logger::info('Item has been marked for deletion.', ['id' => $item_id]);
1201
1202                 return true;
1203         }
1204
1205
1206         private static function guid($item, $notify)
1207         {
1208                 if (!empty($item['guid'])) {
1209                         return Strings::escapeTags(trim($item['guid']));
1210                 }
1211
1212                 if ($notify) {
1213                         // We have to avoid duplicates. So we create the GUID in form of a hash of the plink or uri.
1214                         // We add the hash of our own host because our host is the original creator of the post.
1215                         $prefix_host = DI::baseUrl()->getHostname();
1216                 } else {
1217                         $prefix_host = '';
1218
1219                         // We are only storing the post so we create a GUID from the original hostname.
1220                         if (!empty($item['author-link'])) {
1221                                 $parsed = parse_url($item['author-link']);
1222                                 if (!empty($parsed['host'])) {
1223                                         $prefix_host = $parsed['host'];
1224                                 }
1225                         }
1226
1227                         if (empty($prefix_host) && !empty($item['plink'])) {
1228                                 $parsed = parse_url($item['plink']);
1229                                 if (!empty($parsed['host'])) {
1230                                         $prefix_host = $parsed['host'];
1231                                 }
1232                         }
1233
1234                         if (empty($prefix_host) && !empty($item['uri'])) {
1235                                 $parsed = parse_url($item['uri']);
1236                                 if (!empty($parsed['host'])) {
1237                                         $prefix_host = $parsed['host'];
1238                                 }
1239                         }
1240
1241                         // Is it in the format data@host.tld? - Used for mail contacts
1242                         if (empty($prefix_host) && !empty($item['author-link']) && strstr($item['author-link'], '@')) {
1243                                 $mailparts = explode('@', $item['author-link']);
1244                                 $prefix_host = array_pop($mailparts);
1245                         }
1246                 }
1247
1248                 if (!empty($item['plink'])) {
1249                         $guid = self::guidFromUri($item['plink'], $prefix_host);
1250                 } elseif (!empty($item['uri'])) {
1251                         $guid = self::guidFromUri($item['uri'], $prefix_host);
1252                 } else {
1253                         $guid = System::createUUID(hash('crc32', $prefix_host));
1254                 }
1255
1256                 return $guid;
1257         }
1258
1259         private static function contactId($item)
1260         {
1261                 if (!empty($item['contact-id']) && DBA::exists('contact', ['self' => true, 'id' => $item['contact-id']])) {
1262                         return $item['contact-id'];
1263                 } elseif (($item['gravity'] == GRAVITY_PARENT) && !empty($item['uid']) && !empty($item['contact-id']) && Contact::isSharing($item['contact-id'], $item['uid'])) {
1264                         return $item['contact-id'];
1265                 } elseif (!empty($item['uid']) && !Contact::isSharing($item['author-id'], $item['uid'])) {
1266                         return $item['author-id'];
1267                 } elseif (!empty($item['contact-id'])) {
1268                         return $item['contact-id'];
1269                 } else {
1270                         $contact_id = Contact::getIdForURL($item['author-link'], $item['uid']);
1271                         if (!empty($contact_id)) {
1272                                 return $contact_id;
1273                         }
1274                 }
1275                 return $item['author-id'];
1276         }
1277
1278         // This function will finally cover most of the preparation functionality in mod/item.php
1279         public static function prepare(&$item)
1280         {
1281                 /*
1282                  * @TODO: Unused code triggering inspection errors
1283                  *
1284                 $data = BBCode::getAttachmentData($item['body']);
1285                 if ((preg_match_all("/\[bookmark\=([^\]]*)\](.*?)\[\/bookmark\]/ism", $item['body'], $match, PREG_SET_ORDER) || isset($data["type"]))
1286                         && ($posttype != Item::PT_PERSONAL_NOTE)) {
1287                         $posttype = Item::PT_PAGE;
1288                         $objecttype = ACTIVITY_OBJ_BOOKMARK;
1289                 }
1290                  */
1291         }
1292
1293         /**
1294          * Write an item array into a spool file to be inserted later.
1295          * This command is called whenever there are issues storing an item.
1296          *
1297          * @param array $item The item fields that are to be inserted
1298          * @throws \Exception
1299          */
1300         private static function spool($orig_item)
1301         {
1302                 // Now we store the data in the spool directory
1303                 // We use "microtime" to keep the arrival order and "mt_rand" to avoid duplicates
1304                 $file = 'item-' . round(microtime(true) * 10000) . '-' . mt_rand() . '.msg';
1305
1306                 $spoolpath = get_spoolpath();
1307                 if ($spoolpath != "") {
1308                         $spool = $spoolpath . '/' . $file;
1309
1310                         file_put_contents($spool, json_encode($orig_item));
1311                         Logger::warning("Item wasn't stored - Item was spooled into file", ['file' => $file]);
1312                 }
1313         }
1314
1315         /**
1316          * Check if the item array is a duplicate
1317          *
1318          * @param array $item
1319          * @return boolean is it a duplicate?
1320          */
1321         private static function isDuplicate(array $item)
1322         {
1323                 // Checking if there is already an item with the same guid
1324                 $condition = ['guid' => $item['guid'], 'network' => $item['network'], 'uid' => $item['uid']];
1325                 if (self::exists($condition)) {
1326                         Logger::notice('Found already existing item', [
1327                                 'guid' => $item['guid'],
1328                                 'uid' => $item['uid'],
1329                                 'network' => $item['network']
1330                         ]);
1331                         return true;
1332                 }
1333
1334                 $condition = ["`uri` = ? AND `network` IN (?, ?) AND `uid` = ?",
1335                         $item['uri'], $item['network'], Protocol::DFRN, $item['uid']];
1336                 if (self::exists($condition)) {
1337                         Logger::notice('duplicated item with the same uri found.', $item);
1338                         return true;
1339                 }
1340
1341                 // On Friendica and Diaspora the GUID is unique
1342                 if (in_array($item['network'], [Protocol::DFRN, Protocol::DIASPORA])) {
1343                         $condition = ['guid' => $item['guid'], 'uid' => $item['uid']];
1344                         if (self::exists($condition)) {
1345                                 Logger::notice('duplicated item with the same guid found.', $item);
1346                                 return true;
1347                         }
1348                 } elseif ($item['network'] == Protocol::OSTATUS) {
1349                         // Check for an existing post with the same content. There seems to be a problem with OStatus.
1350                         $condition = ["`body` = ? AND `network` = ? AND `created` = ? AND `contact-id` = ? AND `uid` = ?",
1351                                         $item['body'], $item['network'], $item['created'], $item['contact-id'], $item['uid']];
1352                         if (self::exists($condition)) {
1353                                 Logger::notice('duplicated item with the same body found.', $item);
1354                                 return true;
1355                         }
1356                 }
1357
1358                 /*
1359                  * Check for already added items.
1360                  * There is a timing issue here that sometimes creates double postings.
1361                  * An unique index would help - but the limitations of MySQL (maximum size of index values) prevent this.
1362                  */
1363                 if (($item['uid'] == 0) && self::exists(['uri' => trim($item['uri']), 'uid' => 0])) {
1364                         Logger::notice('Global item already stored.', ['uri' => $item['uri'], 'network' => $item['network']]);
1365                         return true;
1366                 }
1367
1368                 return false;
1369         }
1370
1371         /**
1372          * Check if the item array is valid
1373          *
1374          * @param array $item
1375          * @return boolean item is valid
1376          */
1377         public static function isValid(array $item)
1378         {
1379                 // When there is no content then we don't post it
1380                 if ($item['body'] . $item['title'] == '') {
1381                         Logger::notice('No body, no title.');
1382                         return false;
1383                 }
1384
1385                 if (!empty($item['author-id']) && Contact::isBlocked($item['author-id'])) {
1386                         Logger::notice('Author is blocked node-wide', ['author-link' => $item['author-link'], 'item-uri' => $item['uri']]);
1387                         return false;
1388                 }
1389
1390                 if (!empty($item['author-link']) && Network::isUrlBlocked($item['author-link'])) {
1391                         Logger::notice('Author server is blocked', ['author-link' => $item['author-link'], 'item-uri' => $item['uri']]);
1392                         return false;
1393                 }
1394
1395                 if (!empty($item['owner-id']) && Contact::isBlocked($item['owner-id'])) {
1396                         Logger::notice('Owner is blocked node-wide', ['owner-link' => $item['owner-link'], 'item-uri' => $item['uri']]);
1397                         return false;
1398                 }
1399
1400                 if (!empty($item['owner-link']) && Network::isUrlBlocked($item['owner-link'])) {
1401                         Logger::notice('Owner server is blocked', ['owner-link' => $item['owner-link'], 'item-uri' => $item['uri']]);
1402                         return false;
1403                 }
1404
1405                 if (!empty($item['uid']) && !self::isAllowedByUser($item, $item['uid'])) {
1406                         return false;
1407                 }
1408
1409                 if ($item['verb'] == Activity::FOLLOW) {
1410                         if (!$item['origin'] && ($item['author-id'] == Contact::getPublicIdByUserId($item['uid']))) {
1411                                 // Our own follow request can be relayed to us. We don't store it to avoid notification chaos.
1412                                 Logger::info("Follow: Don't store not origin follow request", ['parent-uri' => $item['parent-uri']]);
1413                                 return false;
1414                         }
1415
1416                         $condition = ['verb' => Activity::FOLLOW, 'uid' => $item['uid'],
1417                                 'parent-uri' => $item['parent-uri'], 'author-id' => $item['author-id']];
1418                         if (self::exists($condition)) {
1419                                 // It happens that we receive multiple follow requests by the same author - we only store one.
1420                                 Logger::info('Follow: Found existing follow request from author', ['author-id' => $item['author-id'], 'parent-uri' => $item['parent-uri']]);
1421                                 return false;
1422                         }
1423                 }
1424
1425                 return true;
1426         }
1427
1428         /**
1429          * Check if the item array is too old
1430          *
1431          * @param array $item
1432          * @return boolean item is too old
1433          */
1434         public static function isTooOld(array $item)
1435         {
1436                 // check for create date and expire time
1437                 $expire_interval = DI::config()->get('system', 'dbclean-expire-days', 0);
1438
1439                 $user = DBA::selectFirst('user', ['expire'], ['uid' => $item['uid']]);
1440                 if (DBA::isResult($user) && ($user['expire'] > 0) && (($user['expire'] < $expire_interval) || ($expire_interval == 0))) {
1441                         $expire_interval = $user['expire'];
1442                 }
1443
1444                 if (($expire_interval > 0) && !empty($item['created'])) {
1445                         $expire_date = time() - ($expire_interval * 86400);
1446                         $created_date = strtotime($item['created']);
1447                         if ($created_date < $expire_date) {
1448                                 Logger::notice('Item created before expiration interval.', [
1449                                         'created' => date('c', $created_date),
1450                                         'expired' => date('c', $expire_date),
1451                                         '$item' => $item
1452                                 ]);
1453                                 return true;
1454                         }
1455                 }
1456
1457                 return false;
1458         }
1459
1460         /**
1461          * Return the id of the given item array if it has been stored before
1462          *
1463          * @param array $item
1464          * @return integer item id
1465          */
1466         private static function getDuplicateID(array $item)
1467         {
1468                 if (empty($item['network']) || in_array($item['network'], Protocol::FEDERATED)) {
1469                         $condition = ["`uri` = ? AND `uid` = ? AND `network` IN (?, ?, ?, ?)",
1470                                 trim($item['uri']), $item['uid'],
1471                                 Protocol::ACTIVITYPUB, Protocol::DIASPORA, Protocol::DFRN, Protocol::OSTATUS];
1472                         $existing = self::selectFirst(['id', 'network'], $condition);
1473                         if (DBA::isResult($existing)) {
1474                                 // We only log the entries with a different user id than 0. Otherwise we would have too many false positives
1475                                 if ($item['uid'] != 0) {
1476                                         Logger::notice('Item already existed for user', [
1477                                                 'uri' => $item['uri'],
1478                                                 'uid' => $item['uid'],
1479                                                 'network' => $item['network'],
1480                                                 'existing_id' => $existing["id"],
1481                                                 'existing_network' => $existing["network"]
1482                                         ]);
1483                                 }
1484
1485                                 return $existing["id"];
1486                         }
1487                 }
1488                 return 0;
1489         }
1490
1491         /**
1492          * Fetch top-level parent data for the given item array
1493          *
1494          * @param array $item
1495          * @return array item array with parent data
1496          * @throws \Exception
1497          */
1498         private static function getTopLevelParent(array $item)
1499         {
1500                 $fields = ['uid', 'uri', 'parent-uri', 'id', 'deleted',
1501                         'allow_cid', 'allow_gid', 'deny_cid', 'deny_gid',
1502                         'wall', 'private', 'forum_mode', 'origin', 'author-id'];
1503                 $condition = ['uri' => $item['thr-parent'], 'uid' => $item['uid']];
1504                 $params = ['order' => ['id' => false]];
1505                 $parent = self::selectFirst($fields, $condition, $params);
1506
1507                 if (!DBA::isResult($parent)) {
1508                         Logger::notice('item parent was not found - ignoring item', ['thr-parent' => $item['thr-parent'], 'uid' => $item['uid']]);
1509                         return [];
1510                 }
1511
1512                 if ($parent['uri'] == $parent['parent-uri']) {
1513                         return $parent;
1514                 }
1515
1516                 $condition = ['uri' => $parent['parent-uri'],
1517                         'parent-uri' => $parent['parent-uri'],
1518                         'uid' => $parent['uid']];
1519                 $params = ['order' => ['id' => false]];
1520                 $toplevel_parent = self::selectFirst($fields, $condition, $params);
1521                 if (!DBA::isResult($toplevel_parent)) {
1522                         Logger::notice('item top level parent was not found - ignoring item', ['parent-uri' => $parent['parent-uri'], 'uid' => $parent['uid']]);
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                         $item['protocol'] = Conversation::PARCEL_DIRECT;
1568
1569                         if (is_int($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                         // If the thread originated from this node, we check the permission against the thread starter
1695                         $condition = ['uri' => $toplevel_parent['uri'], 'wall' => true];
1696                         $localTopLevelParent = self::selectFirst(['uid'], $condition);
1697                         if (!empty($localTopLevelParent['uid']) && !self::isAllowedByUser($item, $localTopLevelParent['uid'])) {
1698                                 return 0;
1699                         }
1700
1701                         $parent_id          = $toplevel_parent['id'];
1702                         $item['parent-uri'] = $toplevel_parent['uri'];
1703                         $item['deleted']    = $toplevel_parent['deleted'];
1704                         $item['allow_cid']  = $toplevel_parent['allow_cid'];
1705                         $item['allow_gid']  = $toplevel_parent['allow_gid'];
1706                         $item['deny_cid']   = $toplevel_parent['deny_cid'];
1707                         $item['deny_gid']   = $toplevel_parent['deny_gid'];
1708                         $parent_origin      = $toplevel_parent['origin'];
1709
1710                         // Don't federate received participation messages
1711                         if ($item['verb'] != Activity::FOLLOW) {
1712                                 $item['wall'] = $toplevel_parent['wall'];
1713                         } else {
1714                                 $item['wall'] = false;
1715                         }
1716
1717                         /*
1718                          * If the parent is private, force privacy for the entire conversation
1719                          * This differs from the above settings as it subtly allows comments from
1720                          * email correspondents to be private even if the overall thread is not.
1721                          */
1722                         if ($toplevel_parent['private']) {
1723                                 $item['private'] = $toplevel_parent['private'];
1724                         }
1725
1726                         /*
1727                          * Edge case. We host a public forum that was originally posted to privately.
1728                          * The original author commented, but as this is a comment, the permissions
1729                          * weren't fixed up so it will still show the comment as private unless we fix it here.
1730                          */
1731                         if ((intval($toplevel_parent['forum_mode']) == 1) && ($toplevel_parent['private'] != self::PUBLIC)) {
1732                                 $item['private'] = self::PUBLIC;
1733                         }
1734
1735                         // If its a post that originated here then tag the thread as "mention"
1736                         if ($item['origin'] && $item['uid']) {
1737                                 DBA::update('thread', ['mention' => true], ['iid' => $parent_id]);
1738                                 Logger::info('tagged thread as mention', ['parent' => $parent_id, 'uid' => $item['uid']]);
1739                         }
1740
1741                         // Update the contact relations
1742                         Contact\Relation::store($toplevel_parent['author-id'], $item['author-id'], $item['created']);
1743
1744                         unset($item['parent_origin']);
1745                 } else {
1746                         $parent_id = 0;
1747                         $parent_origin = $item['origin'];
1748                 }
1749
1750                 // We don't store the causer link, only the id
1751                 unset($item['causer-link']);
1752
1753                 // We don't store these fields anymore in the item table
1754                 unset($item['author-link']);
1755                 unset($item['author-name']);
1756                 unset($item['author-avatar']);
1757                 unset($item['author-network']);
1758
1759                 unset($item['owner-link']);
1760                 unset($item['owner-name']);
1761                 unset($item['owner-avatar']);
1762
1763                 $item['parent-uri-id'] = ItemURI::getIdByURI($item['parent-uri']);
1764                 $item['thr-parent-id'] = ItemURI::getIdByURI($item['thr-parent']);
1765
1766                 // Is this item available in the global items (with uid=0)?
1767                 if ($item["uid"] == 0) {
1768                         $item["global"] = true;
1769
1770                         // Set the global flag on all items if this was a global item entry
1771                         DBA::update('item', ['global' => true], ['uri' => $item["uri"]]);
1772                 } else {
1773                         $item["global"] = self::exists(['uid' => 0, 'uri' => $item["uri"]]);
1774                 }
1775
1776                 // ACL settings
1777                 if (!empty($item["allow_cid"] . $item["allow_gid"] . $item["deny_cid"] . $item["deny_gid"])) {
1778                         $item["private"] = self::PRIVATE;
1779                 }
1780
1781                 if ($notify) {
1782                         $item['edit'] = false;
1783                         $item['parent'] = $parent_id;
1784                         Hook::callAll('post_local', $item);
1785                         unset($item['edit']);
1786                 } else {
1787                         Hook::callAll('post_remote', $item);
1788                 }
1789
1790                 // Set after the insert because top-level posts are self-referencing
1791                 unset($item['parent']);
1792
1793                 if (!empty($item['cancel'])) {
1794                         Logger::log('post cancelled by addon.');
1795                         return 0;
1796                 }
1797
1798                 if (empty($item['vid']) && !empty($item['verb'])) {
1799                         $item['vid'] = Verb::getID($item['verb']);
1800                 }
1801
1802                 // Creates or assigns the permission set
1803                 $item['psid'] = PermissionSet::getIdFromACL(
1804                         $item['uid'],
1805                         $item['allow_cid'],
1806                         $item['allow_gid'],
1807                         $item['deny_cid'],
1808                         $item['deny_gid']
1809                 );
1810
1811                 unset($item['allow_cid']);
1812                 unset($item['allow_gid']);
1813                 unset($item['deny_cid']);
1814                 unset($item['deny_gid']);
1815
1816                 // This array field is used to trigger some automatic reactions
1817                 // It is mainly used in the "post_local" hook.
1818                 unset($item['api_source']);
1819
1820                 if ($item['verb'] == Activity::ANNOUNCE) {
1821                         self::setOwnerforResharedItem($item);
1822                 }
1823
1824                 // Remove all media attachments from the body and store them in the post-media table
1825                 $item['raw-body'] = Post\Media::insertFromBody($item['uri-id'], $item['raw-body']);
1826                 $item['raw-body'] = self::setHashtags($item['raw-body']);
1827
1828                 // Check for hashtags in the body and repair or add hashtag links
1829                 $item['body'] = self::setHashtags($item['body']);
1830
1831                 if (!empty($item['attach'])) {
1832                         Post\Media::insertFromAttachment($item['uri-id'], $item['attach']);
1833                 }
1834
1835                 // Fill the cache field
1836                 self::putInCache($item);
1837
1838                 if (stristr($item['verb'], Activity::POKE)) {
1839                         $notify_type = Delivery::POKE;
1840                 } else {
1841                         $notify_type = Delivery::POST;
1842                 }
1843
1844                 if (!in_array($item['verb'], self::ACTIVITIES)) {
1845                         $item['icid'] = self::insertContent($item);
1846                         if (empty($item['icid'])) {
1847                                 // This shouldn't happen
1848                                 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']]);
1849                                 return 0;
1850                         }
1851                 }
1852
1853                 $body = $item['body'];
1854                 $verb = $item['verb'];
1855
1856                 // We just remove everything that is content
1857                 foreach (array_merge(self::CONTENT_FIELDLIST, self::MIXED_CONTENT_FIELDLIST) as $field) {
1858                         unset($item[$field]);
1859                 }
1860
1861                 unset($item['activity']);
1862
1863                 // Filling item related side tables
1864
1865                 // Diaspora signature
1866                 if (!empty($item['diaspora_signed_text'])) {
1867                         DBA::replace('diaspora-interaction', ['uri-id' => $item['uri-id'], 'interaction' => $item['diaspora_signed_text']]);
1868                 }
1869
1870                 unset($item['diaspora_signed_text']);
1871
1872                 // Attached file links
1873                 if (!empty($item['file'])) {
1874                         Post\Category::storeTextByURIId($item['uri-id'], $item['uid'], $item['file']);
1875                 }
1876
1877                 unset($item['file']);
1878
1879                 // Delivery relevant data
1880                 $delivery_data = Post\DeliveryData::extractFields($item);
1881                 unset($item['postopts']);
1882                 unset($item['inform']);
1883
1884                 if (!empty($item['origin']) || !empty($item['wall']) || !empty($delivery_data['postopts']) || !empty($delivery_data['inform'])) {
1885                         Post\DeliveryData::insert($item['uri-id'], $delivery_data);
1886                 }
1887
1888                 // Store tags from the body if this hadn't been handled previously in the protocol classes
1889                 if (!Tag::existsForPost($item['uri-id'])) {
1890                         Tag::storeFromBody($item['uri-id'], $body);
1891                 }
1892
1893                 if (Post\User::insert($item['uri-id'], $item['uid'], $item)) {
1894                         // Remove all fields that aren't part of the item table
1895                         foreach ($item as $field => $value) {
1896                                 if (!in_array($field, $structure['item'])) {
1897                                         unset($item[$field]);
1898                                 }
1899                         }
1900
1901                         $condition = ['uri-id' => $item['uri-id'], 'uid' => $item['uid'], 'network' => $item['network']];
1902                         if (DBA::exists('item', $condition)) {
1903                                 Logger::notice('Item is already inserted - aborting', $condition);
1904                                 return 0;
1905                         }
1906
1907                         $result = DBA::insert('item', $item);
1908
1909                         // When the item was successfully stored we fetch the ID of the item.
1910                         $current_post = DBA::lastInsertId();
1911                 } else {
1912                         Logger::notice('Post-User is already inserted - aborting', ['uid' => $item['uid'], 'uri-id' => $item['uri-id']]);
1913                         return 0;
1914                 }
1915
1916                 if (empty($current_post) || !DBA::isResult($result)) {
1917                         // On failure store the data into a spool file so that the "SpoolPost" worker can try again later.
1918                         Logger::warning('Could not store item. it will be spooled', ['result' => $result, 'id' => $current_post]);
1919                         self::spool($orig_item);
1920                         return 0;
1921                 }
1922
1923                 Logger::notice('created item', ['id' => $current_post, 'uid' => $item['uid'], 'network' => $item['network'], 'uri-id' => $item['uri-id'], 'guid' => $item['guid']]);
1924
1925                 if (!$parent_id || ($item['gravity'] === GRAVITY_PARENT)) {
1926                         $parent_id = $current_post;
1927                 }
1928
1929                 // Set parent id
1930                 DBA::update('item', ['parent' => $parent_id], ['id' => $current_post]);
1931
1932                 $item['id'] = $current_post;
1933                 $item['parent'] = $parent_id;
1934
1935                 // update the commented timestamp on the parent
1936                 if (DI::config()->get('system', 'like_no_comment')) {
1937                         // Update when it is a comment
1938                         $update_commented = in_array($item['gravity'], [GRAVITY_PARENT, GRAVITY_COMMENT]);
1939                 } else {
1940                         // Update when it isn't a follow or tag verb
1941                         $update_commented = !in_array($verb, [Activity::FOLLOW, Activity::TAG]);
1942                 }
1943
1944                 if ($update_commented) {
1945                         DBA::update('item', ['commented' => DateTimeFormat::utcNow(), 'changed' => DateTimeFormat::utcNow()], ['id' => $parent_id]);
1946                 } else {
1947                         DBA::update('item', ['changed' => DateTimeFormat::utcNow()], ['id' => $parent_id]);
1948                 }
1949
1950                 if ($item['gravity'] === GRAVITY_PARENT) {
1951                         self::addThread($current_post);
1952                 } else {
1953                         self::updateThread($parent_id);
1954                 }
1955
1956                 // In that function we check if this is a forum post. Additionally we delete the item under certain circumstances
1957                 if (self::tagDeliver($item['uid'], $current_post)) {
1958                         // Get the user information for the logging
1959                         $user = User::getById($uid);
1960
1961                         Logger::notice('Item had been deleted', ['id' => $current_post, 'user' => $uid, 'account-type' => $user['account-type']]);
1962                         return 0;
1963                 }
1964
1965                 if (!$dontcache) {
1966                         $posted_item = self::selectFirst(self::ITEM_FIELDLIST, ['id' => $current_post]);
1967                         if (DBA::isResult($posted_item)) {
1968                                 if ($notify) {
1969                                         Hook::callAll('post_local_end', $posted_item);
1970                                 } else {
1971                                         Hook::callAll('post_remote_end', $posted_item);
1972                                 }
1973                         } else {
1974                                 Logger::log('new item not found in DB, id ' . $current_post);
1975                         }
1976                 }
1977
1978                 if ($item['gravity'] === GRAVITY_PARENT) {
1979                         self::addShadow($current_post);
1980                 } else {
1981                         self::addShadowPost($current_post);
1982                 }
1983
1984                 self::updateContact($item);
1985
1986                 UserItem::setNotification($current_post);
1987
1988                 check_user_notification($current_post);
1989
1990                 // Distribute items to users who subscribed to their tags
1991                 self::distributeByTags($item);
1992
1993                 // Automatically reshare the item if the "remote_self" option is selected
1994                 self::autoReshare($item);
1995
1996                 $transmit = $notify || ($item['visible'] && ($parent_origin || $item['origin']));
1997
1998                 if ($transmit) {
1999                         $transmit_item = Item::selectFirst(['verb', 'origin'], ['id' => $item['id']]);
2000                         // Don't relay participation messages
2001                         if (($transmit_item['verb'] == Activity::FOLLOW) &&
2002                                 (!$transmit_item['origin'] || ($item['author-id'] != Contact::getPublicIdByUserId($uid)))) {
2003                                 Logger::info('Participation messages will not be relayed', ['item' => $item['id'], 'uri' => $item['uri'], 'verb' => $transmit_item['verb']]);
2004                                 $transmit = false;
2005                         }
2006                 }
2007
2008                 if ($transmit) {
2009                         Worker::add(['priority' => $priority, 'dont_fork' => true], 'Notifier', $notify_type, $current_post);
2010                 }
2011
2012                 return $current_post;
2013         }
2014
2015         /**
2016          * Change the owner of a parent item if it had been shared by a forum
2017          *
2018          * (public) forum posts in the new format consist of the regular post by the author
2019          * followed by an announce message sent from the forum account.
2020          * Changing the owner helps in grouping forum posts.
2021          *
2022          * @param array $item
2023          * @return void
2024          */
2025         private static function setOwnerforResharedItem(array $item)
2026         {
2027                 $parent = self::selectFirst(['id', 'causer-id', 'owner-id', 'author-id', 'author-link', 'origin', 'post-type'],
2028                         ['uri-id' => $item['thr-parent-id'], 'uid' => $item['uid']]);
2029                 if (!DBA::isResult($parent)) {
2030                         Logger::error('Parent not found', ['uri-id' => $item['thr-parent-id'], 'uid' => $item['uid']]);
2031                         return;
2032                 }
2033
2034                 $author = Contact::selectFirst(['url', 'contact-type'], ['id' => $item['author-id']]);
2035                 if (!DBA::isResult($author)) {
2036                         Logger::error('Author not found', ['id' => $item['author-id']]);
2037                         return;
2038                 }
2039
2040                 $cid = Contact::getIdForURL($author['url'], $item['uid']);
2041                 if (empty($cid) || !Contact::isSharing($cid, $item['uid'])) {
2042                         Logger::info('The resharer is not a following contact: quit', ['resharer' => $author['url'], 'uid' => $item['uid']]);
2043                         return;
2044                 }
2045
2046                 if ($author['contact-type'] != Contact::TYPE_COMMUNITY) {
2047                         if ($parent['post-type'] == self::PT_ANNOUNCEMENT) {
2048                                 Logger::info('The parent is already marked as announced: quit', ['causer' => $parent['causer-id'], 'owner' => $parent['owner-id'], 'author' => $parent['author-id'], 'uid' => $item['uid']]);
2049                                 return;
2050                         }
2051
2052                         if (Contact::isSharing($parent['owner-id'], $item['uid'])) {
2053                                 Logger::info('The resharer is no forum: quit', ['resharer' => $item['author-id'], 'owner' => $parent['owner-id'], 'author' => $parent['author-id'], 'uid' => $item['uid']]);
2054                                 return;
2055                         }
2056                         self::update(['post-type' => self::PT_ANNOUNCEMENT, 'causer-id' => $item['author-id']], ['id' => $parent['id']]);
2057                         Logger::info('Set announcement post-type', ['uri-id' => $item['uri-id'], 'thr-parent-id' => $item['thr-parent-id'], 'uid' => $item['uid']]);
2058                         return;
2059                 }
2060
2061                 self::update(['owner-id' => $item['author-id'], 'contact-id' => $cid], ['id' => $parent['id']]);
2062                 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]);
2063         }
2064
2065         /**
2066          * Distribute the given item to users who subscribed to their tags
2067          *
2068          * @param array $item     Processed item
2069          */
2070         private static function distributeByTags(array $item)
2071         {
2072                 if (($item['uid'] != 0) || ($item['gravity'] != GRAVITY_PARENT) || !in_array($item['network'], Protocol::FEDERATED)) {
2073                         return;
2074                 }
2075
2076                 $uids = Tag::getUIDListByURIId($item['uri-id']);
2077                 foreach ($uids as $uid) {
2078                         if (Contact::isSharing($item['author-id'], $uid)) {
2079                                 $fields = [];
2080                         } else {
2081                                 $fields = ['post-type' => self::PT_TAG];
2082                         }
2083
2084                         $stored = self::storeForUserByUriId($item['uri-id'], $uid, $fields);
2085                         Logger::info('Stored item for users', ['uri-id' => $item['uri-id'], 'uid' => $uid, 'fields' => $fields, 'stored' => $stored]);
2086                 }
2087         }
2088
2089         /**
2090          * Insert a new item content entry
2091          *
2092          * @param array $item The item fields that are to be inserted
2093          * @throws \Exception
2094          */
2095         private static function insertContent(array $item)
2096         {
2097                 $fields = ['uri-plink-hash' => (string)$item['uri-id'], 'uri-id' => $item['uri-id']];
2098
2099                 foreach (array_merge(self::CONTENT_FIELDLIST, self::MIXED_CONTENT_FIELDLIST) as $field) {
2100                         if (isset($item[$field])) {
2101                                 $fields[$field] = $item[$field];
2102                         }
2103                 }
2104
2105                 $item_content = DBA::selectFirst('item-content', ['id'], ['uri-id' => $item['uri-id']]);
2106                 if (DBA::isResult($item_content)) {
2107                         $icid = $item_content['id'];
2108                         Logger::info('Existing content found', ['icid' => $icid, 'uri' => $item['uri']]);
2109                         return $icid;
2110                 }
2111
2112                 DBA::replace('item-content', $fields);
2113
2114                 $item_content = DBA::selectFirst('item-content', ['id'], ['uri-id' => $item['uri-id']]);
2115                 if (DBA::isResult($item_content)) {
2116                         $icid = $item_content['id'];
2117                         Logger::notice('Content inserted', ['icid' => $icid, 'uri' => $item['uri']]);
2118                         return $icid;
2119                 }
2120
2121                 // This shouldn't happen.
2122                 Logger::error("Content wasn't inserted", $item);
2123                 return null;
2124         }
2125
2126         /**
2127          * Update existing item content entries
2128          *
2129          * @param array $item      The item fields that are to be changed
2130          * @param array $condition The condition for finding the item content entries
2131          * @throws \Exception
2132          */
2133         private static function updateContent($item, $condition)
2134         {
2135                 // We have to select only the fields from the "item-content" table
2136                 $fields = [];
2137                 foreach (array_merge(self::CONTENT_FIELDLIST, self::MIXED_CONTENT_FIELDLIST) as $field) {
2138                         if (isset($item[$field])) {
2139                                 $fields[$field] = $item[$field];
2140                         }
2141                 }
2142
2143                 if (empty($fields)) {
2144                         return;
2145                 }
2146
2147                 DBA::update('item-content', $fields, $condition, true);
2148                 Logger::info('Updated content', ['condition' => $condition]);
2149         }
2150
2151         /**
2152          * Distributes public items to the receivers
2153          *
2154          * @param integer $itemid      Item ID that should be added
2155          * @param string  $signed_text Original text (for Diaspora signatures), JSON encoded.
2156          * @throws \Exception
2157          */
2158         public static function distribute($itemid, $signed_text = '')
2159         {
2160                 $condition = ["`id` IN (SELECT `parent` FROM `item` WHERE `id` = ?)", $itemid];
2161                 $parent = self::selectFirst(['owner-id'], $condition);
2162                 if (!DBA::isResult($parent)) {
2163                         return;
2164                 }
2165
2166                 // Only distribute public items from native networks
2167                 $condition = ['id' => $itemid, 'uid' => 0,
2168                         'network' => array_merge(Protocol::FEDERATED ,['']),
2169                         'visible' => true, 'deleted' => false, 'moderated' => false, 'private' => [self::PUBLIC, self::UNLISTED]];
2170                 $item = self::selectFirst(self::ITEM_FIELDLIST, $condition);
2171                 if (!DBA::isResult($item)) {
2172                         return;
2173                 }
2174
2175                 $origin = $item['origin'];
2176
2177                 $users = [];
2178
2179                 /// @todo add a field "pcid" in the contact table that referrs to the public contact id.
2180                 $owner = DBA::selectFirst('contact', ['url', 'nurl', 'alias'], ['id' => $parent['owner-id']]);
2181                 if (!DBA::isResult($owner)) {
2182                         return;
2183                 }
2184
2185                 $condition = ['nurl' => $owner['nurl'], 'rel' => [Contact::SHARING, Contact::FRIEND]];
2186                 $contacts = DBA::select('contact', ['uid'], $condition);
2187                 while ($contact = DBA::fetch($contacts)) {
2188                         if ($contact['uid'] == 0) {
2189                                 continue;
2190                         }
2191
2192                         $users[$contact['uid']] = $contact['uid'];
2193                 }
2194                 DBA::close($contacts);
2195
2196                 $condition = ['alias' => $owner['url'], 'rel' => [Contact::SHARING, Contact::FRIEND]];
2197                 $contacts = DBA::select('contact', ['uid'], $condition);
2198                 while ($contact = DBA::fetch($contacts)) {
2199                         if ($contact['uid'] == 0) {
2200                                 continue;
2201                         }
2202
2203                         $users[$contact['uid']] = $contact['uid'];
2204                 }
2205                 DBA::close($contacts);
2206
2207                 if (!empty($owner['alias'])) {
2208                         $condition = ['nurl' => Strings::normaliseLink($owner['alias']), 'rel' => [Contact::SHARING, Contact::FRIEND]];
2209                         $contacts = DBA::select('contact', ['uid'], $condition);
2210                         while ($contact = DBA::fetch($contacts)) {
2211                                 if ($contact['uid'] == 0) {
2212                                         continue;
2213                                 }
2214
2215                                 $users[$contact['uid']] = $contact['uid'];
2216                         }
2217                         DBA::close($contacts);
2218                 }
2219
2220                 $origin_uid = 0;
2221
2222                 if ($item['uri'] != $item['parent-uri']) {
2223                         $parents = self::select(['uid', 'origin'], ["`uri` = ? AND `uid` != 0", $item['parent-uri']]);
2224                         while ($parent = self::fetch($parents)) {
2225                                 $users[$parent['uid']] = $parent['uid'];
2226                                 if ($parent['origin'] && !$origin) {
2227                                         $origin_uid = $parent['uid'];
2228                                 }
2229                         }
2230                 }
2231
2232                 foreach ($users as $uid) {
2233                         if ($origin_uid == $uid) {
2234                                 $item['diaspora_signed_text'] = $signed_text;
2235                         }
2236                         self::storeForUser($item, $uid);
2237                 }
2238         }
2239
2240         /**
2241          * Store a public item defined by their URI-ID for the given users
2242          *
2243          * @param integer $uri_id URI-ID of the given item
2244          * @param integer $uid    The user that will receive the item entry
2245          * @param array   $fields Additional fields to be stored
2246          * @return integer stored item id
2247          */
2248         public static function storeForUserByUriId(int $uri_id, int $uid, array $fields = [])
2249         {
2250                 $item = self::selectFirst(self::ITEM_FIELDLIST, ['uri-id' => $uri_id, 'uid' => 0]);
2251                 if (!DBA::isResult($item)) {
2252                         return 0;
2253                 }
2254
2255                 if (($item['private'] == self::PRIVATE) || !in_array($item['network'], Protocol::FEDERATED)) {
2256                         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']]);
2257                         return 0;
2258                 }
2259
2260                 $item['post-type'] = self::PT_STORED;
2261
2262                 $item = array_merge($item, $fields);
2263
2264                 $stored = self::storeForUser($item, $uid);
2265                 Logger::info('Public item stored for user', ['uri-id' => $item['uri-id'], 'uid' => $uid, 'stored' => $stored]);
2266                 return $stored;
2267         }
2268
2269         /**
2270          * Store a public item array for the given users
2271          *
2272          * @param array   $item   The item entry that will be stored
2273          * @param integer $uid    The user that will receive the item entry
2274          * @return integer stored item id
2275          * @throws \Exception
2276          */
2277         private static function storeForUser(array $item, int $uid)
2278         {
2279                 if (self::exists(['uri-id' => $item['uri-id'], 'uid' => $uid])) {
2280                         Logger::info('Item already exists', ['uri-id' => $item['uri-id'], 'uid' => $uid]);
2281                         return 0;
2282                 }
2283
2284                 unset($item['id']);
2285                 unset($item['parent']);
2286                 unset($item['mention']);
2287                 unset($item['starred']);
2288                 unset($item['unseen']);
2289                 unset($item['psid']);
2290
2291                 $item['uid'] = $uid;
2292                 $item['origin'] = 0;
2293                 $item['wall'] = 0;
2294
2295                 if ($item['gravity'] == GRAVITY_PARENT) {
2296                         $contact = Contact::getByURLForUser($item['owner-link'], $uid, false, ['id']);
2297                 } else {
2298                         $contact = Contact::getByURLForUser($item['author-link'], $uid, false, ['id']);
2299                 }
2300
2301                 if (!empty($contact['id'])) {
2302                         $item['contact-id'] = $contact['id'];
2303                 } else {
2304                         // Shouldn't happen at all
2305                         Logger::warning('contact-id could not be fetched', ['uid' => $uid, 'item' => $item]);
2306                         $self = DBA::selectFirst('contact', ['id'], ['self' => true, 'uid' => $uid]);
2307                         if (!DBA::isResult($self)) {
2308                                 // Shouldn't happen even less
2309                                 Logger::warning('self contact could not be fetched', ['uid' => $uid, 'item' => $item]);
2310                                 return 0;
2311                         }
2312                         $item['contact-id'] = $self['id'];
2313                 }
2314
2315                 /// @todo Handling of "event-id"
2316
2317                 $notify = false;
2318                 if ($item['gravity'] == GRAVITY_PARENT) {
2319                         $contact = DBA::selectFirst('contact', [], ['id' => $item['contact-id'], 'self' => false]);
2320                         if (DBA::isResult($contact)) {
2321                                 $notify = self::isRemoteSelf($contact, $item);
2322                         }
2323                 }
2324
2325                 $distributed = self::insert($item, $notify, true);
2326
2327                 if (!$distributed) {
2328                         Logger::info("Distributed public item wasn't stored", ['uri-id' => $item['uri-id'], 'user' => $uid]);
2329                 } else {
2330                         Logger::info('Distributed public item was stored', ['uri-id' => $item['uri-id'], 'user' => $uid, 'stored' => $distributed]);
2331                 }
2332                 return $distributed;
2333         }
2334
2335         /**
2336          * Add a shadow entry for a given item id that is a thread starter
2337          *
2338          * We store every public item entry additionally with the user id "0".
2339          * This is used for the community page and for the search.
2340          * It is planned that in the future we will store public item entries only once.
2341          *
2342          * @param integer $itemid Item ID that should be added
2343          * @throws \Exception
2344          */
2345         private static function addShadow($itemid)
2346         {
2347                 $fields = ['uid', 'private', 'moderated', 'visible', 'deleted', 'network', 'uri'];
2348                 $condition = ['id' => $itemid, 'parent' => [0, $itemid]];
2349                 $item = self::selectFirst($fields, $condition);
2350
2351                 if (!DBA::isResult($item)) {
2352                         return;
2353                 }
2354
2355                 // is it already a copy?
2356                 if (($itemid == 0) || ($item['uid'] == 0)) {
2357                         return;
2358                 }
2359
2360                 // Is it a visible public post?
2361                 if (!$item["visible"] || $item["deleted"] || $item["moderated"] || ($item["private"] == Item::PRIVATE)) {
2362                         return;
2363                 }
2364
2365                 // is it an entry from a connector? Only add an entry for natively connected networks
2366                 if (!in_array($item["network"], array_merge(Protocol::FEDERATED ,['']))) {
2367                         return;
2368                 }
2369
2370                 if (self::exists(['uri' => $item['uri'], 'uid' => 0])) {
2371                         return;
2372                 }
2373
2374                 $item = self::selectFirst(self::ITEM_FIELDLIST, ['id' => $itemid]);
2375
2376                 if (DBA::isResult($item)) {
2377                         // Preparing public shadow (removing user specific data)
2378                         $item['uid'] = 0;
2379                         unset($item['id']);
2380                         unset($item['parent']);
2381                         unset($item['wall']);
2382                         unset($item['mention']);
2383                         unset($item['origin']);
2384                         unset($item['starred']);
2385                         unset($item['postopts']);
2386                         unset($item['inform']);
2387                         unset($item['post-type']);
2388                         if ($item['uri'] == $item['parent-uri']) {
2389                                 $item['contact-id'] = $item['owner-id'];
2390                         } else {
2391                                 $item['contact-id'] = $item['author-id'];
2392                         }
2393
2394                         $public_shadow = self::insert($item, false, true);
2395
2396                         Logger::info('Stored public shadow', ['thread' => $itemid, 'id' => $public_shadow]);
2397                 }
2398         }
2399
2400         /**
2401          * Add a shadow entry for a given item id that is a comment
2402          *
2403          * This function does the same like the function above - but for comments
2404          *
2405          * @param integer $itemid Item ID that should be added
2406          * @throws \Exception
2407          */
2408         private static function addShadowPost($itemid)
2409         {
2410                 $item = self::selectFirst(self::ITEM_FIELDLIST, ['id' => $itemid]);
2411                 if (!DBA::isResult($item)) {
2412                         return;
2413                 }
2414
2415                 // Is it a toplevel post?
2416                 if ($item['gravity'] == GRAVITY_PARENT) {
2417                         self::addShadow($itemid);
2418                         return;
2419                 }
2420
2421                 // Is this a shadow entry?
2422                 if ($item['uid'] == 0) {
2423                         return;
2424                 }
2425
2426                 // Is there a shadow parent?
2427                 if (!self::exists(['uri' => $item['parent-uri'], 'uid' => 0])) {
2428                         return;
2429                 }
2430
2431                 // Is there already a shadow entry?
2432                 if (self::exists(['uri' => $item['uri'], 'uid' => 0])) {
2433                         return;
2434                 }
2435
2436                 // Save "origin" and "parent" state
2437                 $origin = $item['origin'];
2438                 $parent = $item['parent'];
2439
2440                 // Preparing public shadow (removing user specific data)
2441                 $item['uid'] = 0;
2442                 unset($item['id']);
2443                 unset($item['parent']);
2444                 unset($item['wall']);
2445                 unset($item['mention']);
2446                 unset($item['origin']);
2447                 unset($item['starred']);
2448                 unset($item['postopts']);
2449                 unset($item['inform']);
2450                 unset($item['post-type']);
2451                 $item['contact-id'] = Contact::getIdForURL($item['author-link']);
2452
2453                 $public_shadow = self::insert($item, false, true);
2454
2455                 Logger::info('Stored public shadow', ['uri' => $item['uri'], 'id' => $public_shadow]);
2456
2457                 // If this was a comment to a Diaspora post we don't get our comment back.
2458                 // This means that we have to distribute the comment by ourselves.
2459                 if ($origin && self::exists(['id' => $parent, 'network' => Protocol::DIASPORA])) {
2460                         self::distribute($public_shadow);
2461                 }
2462         }
2463
2464         /**
2465          * Adds a language specification in a "language" element of given $arr.
2466          * Expects "body" element to exist in $arr.
2467          *
2468          * @param array $item
2469          * @return string detected language
2470          * @throws \Text_LanguageDetect_Exception
2471          */
2472         private static function getLanguage(array $item)
2473         {
2474                 if (!in_array($item['gravity'], [GRAVITY_PARENT, GRAVITY_COMMENT]) || empty($item['body'])) {
2475                         return '';
2476                 }
2477
2478                 // Convert attachments to links
2479                 $naked_body = BBCode::removeAttachment($item['body']);
2480                 if (empty($naked_body)) {
2481                         return '';
2482                 }
2483
2484                 // Remove links and pictures
2485                 $naked_body = BBCode::removeLinks($naked_body);
2486
2487                 // Convert the title and the body to plain text
2488                 $naked_body = trim($item['title'] . "\n" . BBCode::toPlaintext($naked_body));
2489
2490                 // Remove possibly remaining links
2491                 $naked_body = preg_replace(Strings::autoLinkRegEx(), '', $naked_body);
2492
2493                 if (empty($naked_body)) {
2494                         return '';
2495                 }
2496
2497                 $ld = new Language(DI::l10n()->getAvailableLanguages());
2498                 $languages = $ld->detect($naked_body)->limit(0, 3)->close();
2499                 if (is_array($languages)) {
2500                         return json_encode($languages);
2501                 }
2502
2503                 return '';
2504         }
2505
2506         public static function getLanguageMessage(array $item)
2507         {
2508                 $iso639 = new \Matriphe\ISO639\ISO639;
2509
2510                 $used_languages = '';
2511                 foreach (json_decode($item['language'], true) as $language => $reliability) {
2512                         $used_languages .= $iso639->languageByCode1($language) . ' (' . $language . "): " . number_format($reliability, 5) . '\n';
2513                 }
2514                 $used_languages = DI::l10n()->t('Detected languages in this post:\n%s', $used_languages);
2515                 return $used_languages;
2516         }
2517
2518         /**
2519          * Creates an unique guid out of a given uri
2520          *
2521          * @param string $uri uri of an item entry
2522          * @param string $host hostname for the GUID prefix
2523          * @return string unique guid
2524          */
2525         public static function guidFromUri($uri, $host)
2526         {
2527                 // Our regular guid routine is using this kind of prefix as well
2528                 // We have to avoid that different routines could accidentally create the same value
2529                 $parsed = parse_url($uri);
2530
2531                 // We use a hash of the hostname as prefix for the guid
2532                 $guid_prefix = hash("crc32", $host);
2533
2534                 // Remove the scheme to make sure that "https" and "http" doesn't make a difference
2535                 unset($parsed["scheme"]);
2536
2537                 // Glue it together to be able to make a hash from it
2538                 $host_id = implode("/", $parsed);
2539
2540                 // We could use any hash algorithm since it isn't a security issue
2541                 $host_hash = hash("ripemd128", $host_id);
2542
2543                 return $guid_prefix.$host_hash;
2544         }
2545
2546         /**
2547          * generate an unique URI
2548          *
2549          * @param integer $uid  User id
2550          * @param string  $guid An existing GUID (Otherwise it will be generated)
2551          *
2552          * @return string
2553          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
2554          */
2555         public static function newURI($uid, $guid = "")
2556         {
2557                 if ($guid == "") {
2558                         $guid = System::createUUID();
2559                 }
2560
2561                 return DI::baseUrl()->get() . '/objects/' . $guid;
2562         }
2563
2564         /**
2565          * Set "success_update" and "last-item" to the date of the last time we heard from this contact
2566          *
2567          * This can be used to filter for inactive contacts.
2568          * Only do this for public postings to avoid privacy problems, since poco data is public.
2569          * Don't set this value if it isn't from the owner (could be an author that we don't know)
2570          *
2571          * @param array $arr Contains the just posted item record
2572          * @throws \Exception
2573          */
2574         private static function updateContact($arr)
2575         {
2576                 // Unarchive the author
2577                 $contact = DBA::selectFirst('contact', [], ['id' => $arr["author-id"]]);
2578                 if (DBA::isResult($contact)) {
2579                         Contact::unmarkForArchival($contact);
2580                 }
2581
2582                 // Unarchive the contact if it's not our own contact
2583                 $contact = DBA::selectFirst('contact', [], ['id' => $arr["contact-id"], 'self' => false]);
2584                 if (DBA::isResult($contact)) {
2585                         Contact::unmarkForArchival($contact);
2586                 }
2587
2588                 /// @todo On private posts we could obfuscate the date
2589                 $update = ($arr['private'] != self::PRIVATE) || in_array($arr['network'], Protocol::FEDERATED);
2590
2591                 // Is it a forum? Then we don't care about the rules from above
2592                 if (!$update && in_array($arr["network"], [Protocol::ACTIVITYPUB, Protocol::DFRN]) && ($arr["parent-uri"] === $arr["uri"])) {
2593                         if (DBA::exists('contact', ['id' => $arr['contact-id'], 'forum' => true])) {
2594                                 $update = true;
2595                         }
2596                 }
2597
2598                 if ($update) {
2599                         // The "self" contact id is used (for example in the connectors) when the contact is unknown
2600                         // So we have to ensure to only update the last item when it had been our own post,
2601                         // or it had been done by a "regular" contact.
2602                         if (!empty($arr['wall'])) {
2603                                 $condition = ['id' => $arr['contact-id']];
2604                         } else {
2605                                 $condition = ['id' => $arr['contact-id'], 'self' => false];
2606                         }
2607                         DBA::update('contact', ['failed' => false, 'success_update' => $arr['received'], 'last-item' => $arr['received']], $condition);
2608                 }
2609                 // Now do the same for the system wide contacts with uid=0
2610                 if ($arr['private'] != self::PRIVATE) {
2611                         DBA::update('contact', ['failed' => false, 'success_update' => $arr['received'], 'last-item' => $arr['received']],
2612                                 ['id' => $arr['owner-id']]);
2613
2614                         if ($arr['owner-id'] != $arr['author-id']) {
2615                                 DBA::update('contact', ['failed' => false, 'success_update' => $arr['received'], 'last-item' => $arr['received']],
2616                                         ['id' => $arr['author-id']]);
2617                         }
2618                 }
2619         }
2620
2621         public static function setHashtags($body)
2622         {
2623                 $body = BBCode::performWithEscapedTags($body, ['noparse', 'pre', 'code'], function ($body) {
2624                         $tags = BBCode::getTags($body);
2625
2626                         // No hashtags?
2627                         if (!count($tags)) {
2628                                 return $body;
2629                         }
2630
2631                         // This sorting is important when there are hashtags that are part of other hashtags
2632                         // Otherwise there could be problems with hashtags like #test and #test2
2633                         // Because of this we are sorting from the longest to the shortest tag.
2634                         usort($tags, function ($a, $b) {
2635                                 return strlen($b) <=> strlen($a);
2636                         });
2637
2638                         $URLSearchString = "^\[\]";
2639
2640                         // All hashtags should point to the home server if "local_tags" is activated
2641                         if (DI::config()->get('system', 'local_tags')) {
2642                                 $body = preg_replace("/#\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",
2643                                         "#[url=" . DI::baseUrl() . "/search?tag=$2]$2[/url]", $body);
2644                         }
2645
2646                         // mask hashtags inside of url, bookmarks and attachments to avoid urls in urls
2647                         $body = preg_replace_callback("/\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",
2648                                 function ($match) {
2649                                         return ("[url=" . str_replace("#", "&num;", $match[1]) . "]" . str_replace("#", "&num;", $match[2]) . "[/url]");
2650                                 }, $body);
2651
2652                         $body = preg_replace_callback("/\[bookmark\=([$URLSearchString]*)\](.*?)\[\/bookmark\]/ism",
2653                                 function ($match) {
2654                                         return ("[bookmark=" . str_replace("#", "&num;", $match[1]) . "]" . str_replace("#", "&num;", $match[2]) . "[/bookmark]");
2655                                 }, $body);
2656
2657                         $body = preg_replace_callback("/\[attachment (.*)\](.*?)\[\/attachment\]/ism",
2658                                 function ($match) {
2659                                         return ("[attachment " . str_replace("#", "&num;", $match[1]) . "]" . $match[2] . "[/attachment]");
2660                                 }, $body);
2661
2662                         // Repair recursive urls
2663                         $body = preg_replace("/&num;\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",
2664                                 "&num;$2", $body);
2665
2666                         foreach ($tags as $tag) {
2667                                 if ((strpos($tag, '#') !== 0) || strpos($tag, '[url=') || strlen($tag) < 2 || $tag[1] == '#') {
2668                                         continue;
2669                                 }
2670
2671                                 $basetag = str_replace('_', ' ', substr($tag, 1));
2672                                 $newtag = '#[url=' . DI::baseUrl() . '/search?tag=' . $basetag . ']' . $basetag . '[/url]';
2673
2674                                 $body = str_replace($tag, $newtag, $body);
2675                         }
2676
2677                         // Convert back the masked hashtags
2678                         $body = str_replace("&num;", "#", $body);
2679
2680                         return $body;
2681                 });
2682
2683                 return $body;
2684         }
2685
2686         /**
2687          * look for mention tags and setup a second delivery chain for forum/community posts if appropriate
2688          *
2689          * @param int $uid
2690          * @param int $item_id
2691          * @return boolean true if item was deleted, else false
2692          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
2693          * @throws \ImagickException
2694          */
2695         private static function tagDeliver($uid, $item_id)
2696         {
2697                 $mention = false;
2698
2699                 $user = DBA::selectFirst('user', [], ['uid' => $uid]);
2700                 if (!DBA::isResult($user)) {
2701                         return false;
2702                 }
2703
2704                 $community_page = (($user['page-flags'] == User::PAGE_FLAGS_COMMUNITY) ? true : false);
2705                 $prvgroup = (($user['page-flags'] == User::PAGE_FLAGS_PRVGROUP) ? true : false);
2706
2707                 $item = self::selectFirst(self::ITEM_FIELDLIST, ['id' => $item_id]);
2708                 if (!DBA::isResult($item)) {
2709                         return false;
2710                 }
2711
2712                 $link = Strings::normaliseLink(DI::baseUrl() . '/profile/' . $user['nickname']);
2713
2714                 /*
2715                  * Diaspora uses their own hardwired link URL in @-tags
2716                  * instead of the one we supply with webfinger
2717                  */
2718                 $dlink = Strings::normaliseLink(DI::baseUrl() . '/u/' . $user['nickname']);
2719
2720                 $cnt = preg_match_all('/[\@\!]\[url\=(.*?)\](.*?)\[\/url\]/ism', $item['body'], $matches, PREG_SET_ORDER);
2721                 if ($cnt) {
2722                         foreach ($matches as $mtch) {
2723                                 if (Strings::compareLink($link, $mtch[1]) || Strings::compareLink($dlink, $mtch[1])) {
2724                                         $mention = true;
2725                                         Logger::log('mention found: ' . $mtch[2]);
2726                                 }
2727                         }
2728                 }
2729
2730                 if (!$mention) {
2731                         $tags = Tag::getByURIId($item['uri-id'], [Tag::MENTION, Tag::EXCLUSIVE_MENTION]);
2732                         foreach ($tags as $tag) {
2733                                 if (Strings::compareLink($link, $tag['url']) || Strings::compareLink($dlink, $tag['url'])) {
2734                                         $mention = true;
2735                                         DI::logger()->info('mention found in tag.', ['url' => $tag['url']]);
2736                                 }
2737                         }
2738                 }
2739
2740                 if (!$mention) {
2741                         if (($community_page || $prvgroup) &&
2742                                   !$item['wall'] && !$item['origin'] && ($item['gravity'] == GRAVITY_PARENT)) {
2743                                 Logger::info('Delete private group/communiy top-level item without mention', ['id' => $item_id, 'guid'=> $item['guid']]);
2744                                 DBA::delete('item', ['id' => $item_id]);
2745                                 return true;
2746                         }
2747                         return false;
2748                 }
2749
2750                 $arr = ['item' => $item, 'user' => $user];
2751
2752                 Hook::callAll('tagged', $arr);
2753
2754                 if (!$community_page && !$prvgroup) {
2755                         return false;
2756                 }
2757
2758                 /*
2759                  * tgroup delivery - setup a second delivery chain
2760                  * prevent delivery looping - only proceed
2761                  * if the message originated elsewhere and is a top-level post
2762                  */
2763                 if ($item['wall'] || $item['origin'] || ($item['id'] != $item['parent'])) {
2764                         return false;
2765                 }
2766
2767                 // now change this copy of the post to a forum head message and deliver to all the tgroup members
2768                 $self = DBA::selectFirst('contact', ['id', 'name', 'url', 'thumb'], ['uid' => $uid, 'self' => true]);
2769                 if (!DBA::isResult($self)) {
2770                         return false;
2771                 }
2772
2773                 $owner_id = Contact::getIdForURL($self['url']);
2774
2775                 // also reset all the privacy bits to the forum default permissions
2776
2777                 $private = ($user['allow_cid'] || $user['allow_gid'] || $user['deny_cid'] || $user['deny_gid']) ? self::PRIVATE : self::PUBLIC;
2778
2779                 $psid = PermissionSet::getIdFromACL(
2780                         $user['uid'],
2781                         $user['allow_cid'],
2782                         $user['allow_gid'],
2783                         $user['deny_cid'],
2784                         $user['deny_gid']
2785                 );
2786
2787                 $forum_mode = ($prvgroup ? 2 : 1);
2788
2789                 $fields = ['wall' => true, 'origin' => true, 'forum_mode' => $forum_mode, 'contact-id' => $self['id'],
2790                         'owner-id' => $owner_id, 'private' => $private, 'psid' => $psid];
2791                 self::update($fields, ['id' => $item_id]);
2792
2793                 Worker::add(['priority' => PRIORITY_HIGH, 'dont_fork' => true], 'Notifier', Delivery::POST, $item_id);
2794
2795                 Item::performActivity($item_id, 'announce', $uid);
2796
2797                 return false;
2798         }
2799
2800         /**
2801          * Automatically reshare the item if the "remote_self" option is selected
2802          *
2803          * @param array $item
2804          * @return void
2805          */
2806         private static function autoReshare(array $item)
2807         {
2808                 if ($item['gravity'] != GRAVITY_PARENT) {
2809                         return;
2810                 }
2811
2812                 if (!DBA::exists('contact', ['id' => $item['contact-id'], 'remote_self' => Contact::MIRROR_NATIVE_RESHARE])) {
2813                         return;
2814                 }
2815
2816                 if (!in_array($item['network'], [Protocol::ACTIVITYPUB, Protocol::DFRN])) {
2817                         return;
2818                 }
2819
2820                 Logger::info('Automatically reshare item', ['uid' => $item['uid'], 'id' => $item['id'], 'guid' => $item['guid'], 'uri-id' => $item['uri-id']]);
2821
2822                 Item::performActivity($item['id'], 'announce', $item['uid']);
2823         }
2824
2825         public static function isRemoteSelf($contact, &$datarray)
2826         {
2827                 if (!$contact['remote_self']) {
2828                         return false;
2829                 }
2830
2831                 // Prevent the forwarding of posts that are forwarded
2832                 if (!empty($datarray["extid"]) && ($datarray["extid"] == Protocol::DFRN)) {
2833                         Logger::info('Already forwarded');
2834                         return false;
2835                 }
2836
2837                 // Prevent to forward already forwarded posts
2838                 if ($datarray["app"] == DI::baseUrl()->getHostname()) {
2839                         Logger::info('Already forwarded (second test)');
2840                         return false;
2841                 }
2842
2843                 // Only forward posts
2844                 if ($datarray["verb"] != Activity::POST) {
2845                         Logger::info('No post');
2846                         return false;
2847                 }
2848
2849                 if (($contact['network'] != Protocol::FEED) && ($datarray['private'] == self::PRIVATE)) {
2850                         Logger::info('Not public');
2851                         return false;
2852                 }
2853
2854                 $datarray2 = $datarray;
2855                 Logger::info('remote-self start', ['contact' => $contact['url'], 'remote_self'=> $contact['remote_self'], 'item' => $datarray]);
2856                 if ($contact['remote_self'] == Contact::MIRROR_OWN_POST) {
2857                         $self = DBA::selectFirst('contact', ['id', 'name', 'url', 'thumb'],
2858                                         ['uid' => $contact['uid'], 'self' => true]);
2859                         if (DBA::isResult($self)) {
2860                                 $datarray['contact-id'] = $self["id"];
2861
2862                                 $datarray['owner-name'] = $self["name"];
2863                                 $datarray['owner-link'] = $self["url"];
2864                                 $datarray['owner-avatar'] = $self["thumb"];
2865
2866                                 $datarray['author-name']   = $datarray['owner-name'];
2867                                 $datarray['author-link']   = $datarray['owner-link'];
2868                                 $datarray['author-avatar'] = $datarray['owner-avatar'];
2869
2870                                 unset($datarray['edited']);
2871
2872                                 unset($datarray['network']);
2873                                 unset($datarray['owner-id']);
2874                                 unset($datarray['author-id']);
2875                         }
2876
2877                         if ($contact['network'] != Protocol::FEED) {
2878                                 $old_uri_id = $datarray["uri-id"] ?? 0;
2879                                 $datarray["guid"] = System::createUUID();
2880                                 unset($datarray["plink"]);
2881                                 $datarray["uri"] = self::newURI($contact['uid'], $datarray["guid"]);
2882                                 $datarray["uri-id"] = ItemURI::getIdByURI($datarray["uri"]);
2883                                 $datarray["extid"] = Protocol::DFRN;
2884                                 $urlpart = parse_url($datarray2['author-link']);
2885                                 $datarray["app"] = $urlpart["host"];
2886                                 if (!empty($old_uri_id)) {
2887                                         Post\Media::copy($old_uri_id, $datarray["uri-id"]);
2888                                 }
2889
2890                                 unset($datarray["parent-uri"]);
2891                                 unset($datarray["thr-parent"]);
2892                         } else {
2893                                 $datarray['private'] = self::PUBLIC;
2894                         }
2895                 }
2896
2897                 if ($contact['network'] != Protocol::FEED) {
2898                         // Store the original post
2899                         $result = self::insert($datarray2);
2900                         Logger::info('remote-self post original item', ['contact' => $contact['url'], 'result'=> $result, 'item' => $datarray2]);
2901                 } else {
2902                         $datarray["app"] = "Feed";
2903                         $result = true;
2904                 }
2905
2906                 // Trigger automatic reactions for addons
2907                 $datarray['api_source'] = true;
2908
2909                 // We have to tell the hooks who we are - this really should be improved
2910                 $_SESSION["authenticated"] = true;
2911                 $_SESSION["uid"] = $contact['uid'];
2912
2913                 return $result;
2914         }
2915
2916         /**
2917          *
2918          * @param string $s
2919          * @param int    $uid
2920          * @param array  $item
2921          * @param int    $cid
2922          * @return string
2923          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
2924          * @throws \ImagickException
2925          */
2926         public static function fixPrivatePhotos($s, $uid, $item = null, $cid = 0)
2927         {
2928                 if (DI::config()->get('system', 'disable_embedded')) {
2929                         return $s;
2930                 }
2931
2932                 Logger::info('check for photos');
2933                 $site = substr(DI::baseUrl(), strpos(DI::baseUrl(), '://'));
2934
2935                 $orig_body = $s;
2936                 $new_body = '';
2937
2938                 $img_start = strpos($orig_body, '[img');
2939                 $img_st_close = ($img_start !== false ? strpos(substr($orig_body, $img_start), ']') : false);
2940                 $img_len = ($img_start !== false ? strpos(substr($orig_body, $img_start + $img_st_close + 1), '[/img]') : false);
2941
2942                 while (($img_st_close !== false) && ($img_len !== false)) {
2943                         $img_st_close++; // make it point to AFTER the closing bracket
2944                         $image = substr($orig_body, $img_start + $img_st_close, $img_len);
2945
2946                         Logger::info('found photo', ['image' => $image]);
2947
2948                         if (stristr($image, $site . '/photo/')) {
2949                                 // Only embed locally hosted photos
2950                                 $replace = false;
2951                                 $i = basename($image);
2952                                 $i = str_replace(['.jpg', '.png', '.gif'], ['', '', ''], $i);
2953                                 $x = strpos($i, '-');
2954
2955                                 if ($x) {
2956                                         $res = substr($i, $x + 1);
2957                                         $i = substr($i, 0, $x);
2958                                         $photo = Photo::getPhotoForUser($uid, $i, $res);
2959                                         if (DBA::isResult($photo)) {
2960                                                 /*
2961                                                  * Check to see if we should replace this photo link with an embedded image
2962                                                  * 1. No need to do so if the photo is public
2963                                                  * 2. If there's a contact-id provided, see if they're in the access list
2964                                                  *    for the photo. If so, embed it.
2965                                                  * 3. Otherwise, if we have an item, see if the item permissions match the photo
2966                                                  *    permissions, regardless of order but first check to see if they're an exact
2967                                                  *    match to save some processing overhead.
2968                                                  */
2969                                                 if (self::hasPermissions($photo)) {
2970                                                         if ($cid) {
2971                                                                 $recips = self::enumeratePermissions($photo);
2972                                                                 if (in_array($cid, $recips)) {
2973                                                                         $replace = true;
2974                                                                 }
2975                                                         } elseif ($item) {
2976                                                                 if (self::samePermissions($uid, $item, $photo)) {
2977                                                                         $replace = true;
2978                                                                 }
2979                                                         }
2980                                                 }
2981                                                 if ($replace) {
2982                                                         $photo_img = Photo::getImageForPhoto($photo);
2983                                                         // If a custom width and height were specified, apply before embedding
2984                                                         if (preg_match("/\[img\=([0-9]*)x([0-9]*)\]/is", substr($orig_body, $img_start, $img_st_close), $match)) {
2985                                                                 Logger::info('scaling photo');
2986
2987                                                                 $width = intval($match[1]);
2988                                                                 $height = intval($match[2]);
2989
2990                                                                 $photo_img->scaleDown(max($width, $height));
2991                                                         }
2992
2993                                                         $data = $photo_img->asString();
2994                                                         $type = $photo_img->getType();
2995
2996                                                         Logger::info('replacing photo');
2997                                                         $image = 'data:' . $type . ';base64,' . base64_encode($data);
2998                                                         Logger::debug('replaced', ['image' => $image]);
2999                                                 }
3000                                         }
3001                                 }
3002                         }
3003
3004                         $new_body = $new_body . substr($orig_body, 0, $img_start + $img_st_close) . $image . '[/img]';
3005                         $orig_body = substr($orig_body, $img_start + $img_st_close + $img_len + strlen('[/img]'));
3006                         if ($orig_body === false) {
3007                                 $orig_body = '';
3008                         }
3009
3010                         $img_start = strpos($orig_body, '[img');
3011                         $img_st_close = ($img_start !== false ? strpos(substr($orig_body, $img_start), ']') : false);
3012                         $img_len = ($img_start !== false ? strpos(substr($orig_body, $img_start + $img_st_close + 1), '[/img]') : false);
3013                 }
3014
3015                 $new_body = $new_body . $orig_body;
3016
3017                 return $new_body;
3018         }
3019
3020         private static function hasPermissions($obj)
3021         {
3022                 return !empty($obj['allow_cid']) || !empty($obj['allow_gid']) ||
3023                         !empty($obj['deny_cid']) || !empty($obj['deny_gid']);
3024         }
3025
3026         private static function samePermissions($uid, $obj1, $obj2)
3027         {
3028                 // first part is easy. Check that these are exactly the same.
3029                 if (($obj1['allow_cid'] == $obj2['allow_cid'])
3030                         && ($obj1['allow_gid'] == $obj2['allow_gid'])
3031                         && ($obj1['deny_cid'] == $obj2['deny_cid'])
3032                         && ($obj1['deny_gid'] == $obj2['deny_gid'])) {
3033                         return true;
3034                 }
3035
3036                 // This is harder. Parse all the permissions and compare the resulting set.
3037                 $recipients1 = self::enumeratePermissions($obj1);
3038                 $recipients2 = self::enumeratePermissions($obj2);
3039                 sort($recipients1);
3040                 sort($recipients2);
3041
3042                 /// @TODO Comparison of arrays, maybe use array_diff_assoc() here?
3043                 return ($recipients1 == $recipients2);
3044         }
3045
3046         /**
3047          * Returns an array of contact-ids that are allowed to see this object
3048          *
3049          * @param array $obj        Item array with at least uid, allow_cid, allow_gid, deny_cid and deny_gid
3050          * @param bool  $check_dead Prunes unavailable contacts from the result
3051          * @return array
3052          * @throws \Exception
3053          */
3054         public static function enumeratePermissions(array $obj, bool $check_dead = false)
3055         {
3056                 $aclFormater = DI::aclFormatter();
3057
3058                 $allow_people = $aclFormater->expand($obj['allow_cid']);
3059                 $allow_groups = Group::expand($obj['uid'], $aclFormater->expand($obj['allow_gid']), $check_dead);
3060                 $deny_people  = $aclFormater->expand($obj['deny_cid']);
3061                 $deny_groups  = Group::expand($obj['uid'], $aclFormater->expand($obj['deny_gid']), $check_dead);
3062                 $recipients   = array_unique(array_merge($allow_people, $allow_groups));
3063                 $deny         = array_unique(array_merge($deny_people, $deny_groups));
3064                 $recipients   = array_diff($recipients, $deny);
3065                 return $recipients;
3066         }
3067
3068         public static function expire(int $uid, int $days, string $network = "", bool $force = false)
3069         {
3070                 if (!$uid || ($days < 1)) {
3071                         return;
3072                 }
3073
3074                 $condition = ["`uid` = ? AND NOT `deleted` AND `gravity` = ?",
3075                         $uid, GRAVITY_PARENT];
3076
3077                 /*
3078                  * $expire_network_only = save your own wall posts
3079                  * and just expire conversations started by others
3080                  */
3081                 $expire_network_only = DI::pConfig()->get($uid, 'expire', 'network_only', false);
3082
3083                 if ($expire_network_only) {
3084                         $condition[0] .= " AND NOT `wall`";
3085                 }
3086
3087                 if ($network != "") {
3088                         $condition[0] .= " AND `network` = ?";
3089                         $condition[] = $network;
3090                 }
3091
3092                 $condition[0] .= " AND `received` < UTC_TIMESTAMP() - INTERVAL ? DAY";
3093                 $condition[] = $days;
3094
3095                 $items = self::select(['file', 'resource-id', 'starred', 'type', 'id', 'post-type'], $condition);
3096
3097                 if (!DBA::isResult($items)) {
3098                         return;
3099                 }
3100
3101                 $expire_items = DI::pConfig()->get($uid, 'expire', 'items', true);
3102
3103                 // Forcing expiring of items - but not notes and marked items
3104                 if ($force) {
3105                         $expire_items = true;
3106                 }
3107
3108                 $expire_notes = DI::pConfig()->get($uid, 'expire', 'notes', true);
3109                 $expire_starred = DI::pConfig()->get($uid, 'expire', 'starred', true);
3110                 $expire_photos = DI::pConfig()->get($uid, 'expire', 'photos', false);
3111
3112                 $expired = 0;
3113
3114                 while ($item = Item::fetch($items)) {
3115                         // don't expire filed items
3116
3117                         if (strpos($item['file'], '[') !== false) {
3118                                 continue;
3119                         }
3120
3121                         // Only expire posts, not photos and photo comments
3122
3123                         if (!$expire_photos && strlen($item['resource-id'])) {
3124                                 continue;
3125                         } elseif (!$expire_starred && intval($item['starred'])) {
3126                                 continue;
3127                         } elseif (!$expire_notes && (($item['type'] == 'note') || ($item['post-type'] == Item::PT_PERSONAL_NOTE))) {
3128                                 continue;
3129                         } elseif (!$expire_items && ($item['type'] != 'note') && ($item['post-type'] != Item::PT_PERSONAL_NOTE)) {
3130                                 continue;
3131                         }
3132
3133                         self::markForDeletionById($item['id'], PRIORITY_LOW);
3134
3135                         ++$expired;
3136                 }
3137                 DBA::close($items);
3138                 Logger::log('User ' . $uid . ": expired $expired items; expire items: $expire_items, expire notes: $expire_notes, expire starred: $expire_starred, expire photos: $expire_photos");
3139         }
3140
3141         public static function firstPostDate($uid, $wall = false)
3142         {
3143                 $condition = ['uid' => $uid, 'wall' => $wall, 'deleted' => false, 'visible' => true, 'moderated' => false];
3144                 $params = ['order' => ['received' => false]];
3145                 $thread = DBA::selectFirst('thread', ['received'], $condition, $params);
3146                 if (DBA::isResult($thread)) {
3147                         return substr(DateTimeFormat::local($thread['received']), 0, 10);
3148                 }
3149                 return false;
3150         }
3151
3152         /**
3153          * add/remove activity to an item
3154          *
3155          * Toggle activities as like,dislike,attend of an item
3156          *
3157          * @param int $item_id
3158          * @param string $verb
3159          *            Activity verb. One of
3160          *            like, unlike, dislike, undislike, attendyes, unattendyes,
3161          *            attendno, unattendno, attendmaybe, unattendmaybe,
3162          *            announce, unannouce
3163          * @return bool
3164          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
3165          * @throws \ImagickException
3166          * @hook  'post_local_end'
3167          *            array $arr
3168          *            'post_id' => ID of posted item
3169          */
3170         public static function performActivity(int $item_id, string $verb, int $uid)
3171         {
3172                 if (empty($uid)) {
3173                         return false;
3174                 }
3175
3176                 Logger::notice('Start create activity', ['verb' => $verb, 'item' => $item_id, 'user' => $uid]);
3177
3178                 $item = self::selectFirst(self::ITEM_FIELDLIST, ['id' => $item_id]);
3179                 if (!DBA::isResult($item)) {
3180                         Logger::log('like: unknown item ' . $item_id);
3181                         return false;
3182                 }
3183
3184                 $item_uri = $item['uri'];
3185
3186                 if (!in_array($item['uid'], [0, $uid])) {
3187                         return false;
3188                 }
3189
3190                 if (!Item::exists(['uri-id' => $item['parent-uri-id'], 'uid' => $uid])) {
3191                         $stored = self::storeForUserByUriId($item['parent-uri-id'], $uid);
3192                         if (($item['parent-uri-id'] == $item['uri-id']) && !empty($stored)) {
3193                                 $item = self::selectFirst(self::ITEM_FIELDLIST, ['id' => $stored]);
3194                                 if (!DBA::isResult($item)) {
3195                                         Logger::info('Could not fetch just created item - should not happen', ['stored' => $stored, 'uid' => $uid, 'item-uri' => $item_uri]);
3196                                         return false;
3197                                 }
3198                         }
3199                 }
3200
3201                 // Retrieves the local post owner
3202                 $owner = User::getOwnerDataById($uid);
3203                 if (empty($owner)) {
3204                         Logger::info('Empty owner for user', ['uid' => $uid]);
3205                         return false;
3206                 }
3207
3208                 // Retrieve the current logged in user's public contact
3209                 $author_id = Contact::getIdForURL($owner['url']);
3210                 if (empty($author_id)) {
3211                         Logger::info('Empty public contact');
3212                         return false;
3213                 }
3214
3215                 $activity = null;
3216                 switch ($verb) {
3217                         case 'like':
3218                         case 'unlike':
3219                                 $activity = Activity::LIKE;
3220                                 break;
3221                         case 'dislike':
3222                         case 'undislike':
3223                                 $activity = Activity::DISLIKE;
3224                                 break;
3225                         case 'attendyes':
3226                         case 'unattendyes':
3227                                 $activity = Activity::ATTEND;
3228                                 break;
3229                         case 'attendno':
3230                         case 'unattendno':
3231                                 $activity = Activity::ATTENDNO;
3232                                 break;
3233                         case 'attendmaybe':
3234                         case 'unattendmaybe':
3235                                 $activity = Activity::ATTENDMAYBE;
3236                                 break;
3237                         case 'follow':
3238                         case 'unfollow':
3239                                 $activity = Activity::FOLLOW;
3240                                 break;
3241                         case 'announce':
3242                         case 'unannounce':
3243                                 $activity = Activity::ANNOUNCE;
3244                                 break;
3245                         default:
3246                                 Logger::notice('unknown verb', ['verb' => $verb, 'item' => $item_id]);
3247                                 return false;
3248                 }
3249
3250                 $mode = Strings::startsWith($verb, 'un') ? 'delete' : 'create';
3251
3252                 // Enable activity toggling instead of on/off
3253                 $event_verb_flag = $activity === Activity::ATTEND || $activity === Activity::ATTENDNO || $activity === Activity::ATTENDMAYBE;
3254
3255                 // Look for an existing verb row
3256                 // Event participation activities are mutually exclusive, only one of them can exist at all times.
3257                 if ($event_verb_flag) {
3258                         $verbs = [Activity::ATTEND, Activity::ATTENDNO, Activity::ATTENDMAYBE];
3259
3260                         // Translate to the index based activity index
3261                         $vids = [];
3262                         foreach ($verbs as $verb) {
3263                                 $vids[] = Verb::getID($verb);
3264                         }
3265                 } else {
3266                         $vids = Verb::getID($activity);
3267                 }
3268
3269                 $condition = ['vid' => $vids, 'deleted' => false, 'gravity' => GRAVITY_ACTIVITY,
3270                         'author-id' => $author_id, 'uid' => $item['uid'], 'thr-parent' => $item_uri];
3271                 $like_item = self::selectFirst(['id', 'guid', 'verb'], $condition);
3272
3273                 if (DBA::isResult($like_item)) {
3274                         /**
3275                          * Truth table for existing activities
3276                          *
3277                          * |          Inputs            ||      Outputs      |
3278                          * |----------------------------||-------------------|
3279                          * |  Mode  | Event | Same verb || Delete? | Return? |
3280                          * |--------|-------|-----------||---------|---------|
3281                          * | create |  Yes  |    Yes    ||   No    |   Yes   |
3282                          * | create |  Yes  |    No     ||   Yes   |   No    |
3283                          * | create |  No   |    Yes    ||   No    |   Yes   |
3284                          * | create |  No   |    No     ||        N/A†       |
3285                          * | delete |  Yes  |    Yes    ||   Yes   |   N/A‡  |
3286                          * | delete |  Yes  |    No     ||   No    |   N/A‡  |
3287                          * | delete |  No   |    Yes    ||   Yes   |   N/A‡  |
3288                          * | delete |  No   |    No     ||        N/A†       |
3289                          * |--------|-------|-----------||---------|---------|
3290                          * |   A    |   B   |     C     || A xor C | !B or C |
3291                          *
3292                          * † Can't happen: It's impossible to find an existing non-event activity without
3293                          *                 the same verb because we are only looking for this single verb.
3294                          *
3295                          * ‡ The "mode = delete" is returning early whether an existing activity was found or not.
3296                          */
3297                         if ($mode == 'create' xor $like_item['verb'] == $activity) {
3298                                 self::markForDeletionById($like_item['id']);
3299                         }
3300
3301                         if (!$event_verb_flag || $like_item['verb'] == $activity) {
3302                                 return true;
3303                         }
3304                 }
3305
3306                 // No need to go further if we aren't creating anything
3307                 if ($mode == 'delete') {
3308                         return true;
3309                 }
3310
3311                 $objtype = $item['resource-id'] ? Activity\ObjectType::IMAGE : Activity\ObjectType::NOTE;
3312
3313                 $new_item = [
3314                         'guid'          => System::createUUID(),
3315                         'uri'           => self::newURI($item['uid']),
3316                         'uid'           => $item['uid'],
3317                         'contact-id'    => $owner['id'],
3318                         'wall'          => $item['wall'],
3319                         'origin'        => 1,
3320                         'network'       => Protocol::DFRN,
3321                         'gravity'       => GRAVITY_ACTIVITY,
3322                         'parent'        => $item['id'],
3323                         'thr-parent'    => $item['uri'],
3324                         'owner-id'      => $author_id,
3325                         'author-id'     => $author_id,
3326                         'body'          => $activity,
3327                         'verb'          => $activity,
3328                         'object-type'   => $objtype,
3329                         'allow_cid'     => $item['allow_cid'],
3330                         'allow_gid'     => $item['allow_gid'],
3331                         'deny_cid'      => $item['deny_cid'],
3332                         'deny_gid'      => $item['deny_gid'],
3333                         'visible'       => 1,
3334                         'unseen'        => 1,
3335                 ];
3336
3337                 $signed = Diaspora::createLikeSignature($uid, $new_item);
3338                 if (!empty($signed)) {
3339                         $new_item['diaspora_signed_text'] = json_encode($signed);
3340                 }
3341
3342                 $new_item_id = self::insert($new_item);
3343
3344                 // If the parent item isn't visible then set it to visible
3345                 if (!$item['visible']) {
3346                         self::update(['visible' => true], ['id' => $item['id']]);
3347                 }
3348
3349                 $new_item['id'] = $new_item_id;
3350
3351                 Hook::callAll('post_local_end', $new_item);
3352
3353                 return true;
3354         }
3355
3356         private static function addThread($itemid, $onlyshadow = false)
3357         {
3358                 $fields = ['uid', 'created', 'edited', 'commented', 'received', 'changed', 'wall', 'private', 'pubmail',
3359                         'moderated', 'visible', 'starred', 'contact-id', 'post-type', 'uri-id',
3360                         'deleted', 'origin', 'forum_mode', 'mention', 'network', 'author-id', 'owner-id'];
3361                 $condition = ["`id` = ? AND (`parent` = ? OR `parent` = 0)", $itemid, $itemid];
3362                 $item = self::selectFirst($fields, $condition);
3363
3364                 if (!DBA::isResult($item)) {
3365                         return;
3366                 }
3367
3368                 $item['iid'] = $itemid;
3369
3370                 if (!$onlyshadow) {
3371                         $result = DBA::replace('thread', $item);
3372
3373                         Logger::info('Add thread', ['item' => $itemid, 'result' => $result]);
3374                 }
3375         }
3376
3377         private static function updateThread($itemid, $setmention = false)
3378         {
3379                 $fields = ['uid', 'guid', 'created', 'edited', 'commented', 'received', 'changed', 'post-type',
3380                         'wall', 'private', 'pubmail', 'moderated', 'visible', 'starred', 'contact-id', 'uri-id',
3381                         'deleted', 'origin', 'forum_mode', 'network', 'author-id', 'owner-id'];
3382
3383                 $item = self::selectFirst($fields, ['id' => $itemid, 'gravity' => GRAVITY_PARENT]);
3384                 if (!DBA::isResult($item)) {
3385                         return;
3386                 }
3387
3388                 if ($setmention) {
3389                         $item["mention"] = 1;
3390                 }
3391
3392                 $fields = [];
3393
3394                 foreach ($item as $field => $data) {
3395                         if (!in_array($field, ["guid"])) {
3396                                 $fields[$field] = $data;
3397                         }
3398                 }
3399
3400                 $result = DBA::update('thread', $fields, ['iid' => $itemid]);
3401
3402                 Logger::info('Update thread', ['item' => $itemid, 'guid' => $item["guid"], 'result' => $result]);
3403         }
3404
3405         private static function deleteThread($itemid, $itemuri = "")
3406         {
3407                 $item = DBA::selectFirst('thread', ['uid'], ['iid' => $itemid]);
3408                 if (!DBA::isResult($item)) {
3409                         Logger::info('No thread found', ['id' => $itemid]);
3410                         return;
3411                 }
3412
3413                 $result = DBA::delete('thread', ['iid' => $itemid], ['cascade' => false]);
3414
3415                 Logger::info('Deleted thread', ['item' => $itemid, 'result' => $result]);
3416
3417                 if ($itemuri != "") {
3418                         $condition = ["`uri` = ? AND NOT `deleted` AND NOT (`uid` IN (?, 0))", $itemuri, $item["uid"]];
3419                         if (!self::exists($condition)) {
3420                                 DBA::delete('item', ['uri' => $itemuri, 'uid' => 0]);
3421                                 Logger::debug('Deleted shadow item', ['id' => $itemid, 'uri' => $itemuri]);
3422                         }
3423                 }
3424         }
3425
3426         /**
3427          * Fetch the SQL condition for the given user id
3428          *
3429          * @param integer $owner_id User ID for which the permissions should be fetched
3430          * @return array condition
3431          */
3432         public static function getPermissionsConditionArrayByUserId(int $owner_id)
3433         {
3434                 $local_user = local_user();
3435                 $remote_user = Session::getRemoteContactID($owner_id);
3436
3437                 // default permissions - anonymous user
3438                 $condition = ["`private` != ?", self::PRIVATE];
3439
3440                 if ($local_user && ($local_user == $owner_id)) {
3441                         // Profile owner - everything is visible
3442                         $condition = [];
3443                 } elseif ($remote_user) {
3444                          // Authenticated visitor - fetch the matching permissionsets
3445                         $set = PermissionSet::get($owner_id, $remote_user);
3446                         if (!empty($set)) {
3447                                 $condition = ["(`private` != ? OR (`private` = ? AND `wall`
3448                                         AND `psid` IN (" . implode(', ', array_fill(0, count($set), '?')) . ")))",
3449                                         Item::PRIVATE, Item::PRIVATE];
3450                                 $condition = array_merge($condition, $set);
3451                         }
3452                 }
3453
3454                 return $condition;
3455         }
3456
3457         public static function getPermissionsSQLByUserId($owner_id)
3458         {
3459                 $local_user = local_user();
3460                 $remote_user = Session::getRemoteContactID($owner_id);
3461
3462                 /*
3463                  * Construct permissions
3464                  *
3465                  * default permissions - anonymous user
3466                  */
3467                 $sql = sprintf(" AND `item`.`private` != %d", self::PRIVATE);
3468
3469                 // Profile owner - everything is visible
3470                 if ($local_user && ($local_user == $owner_id)) {
3471                         $sql = '';
3472                 } elseif ($remote_user) {
3473                         /*
3474                          * Authenticated visitor. Unless pre-verified,
3475                          * check that the contact belongs to this $owner_id
3476                          * and load the groups the visitor belongs to.
3477                          * If pre-verified, the caller is expected to have already
3478                          * done this and passed the groups into this function.
3479                          */
3480                         $set = PermissionSet::get($owner_id, $remote_user);
3481
3482                         if (!empty($set)) {
3483                                 $sql_set = sprintf(" OR (`item`.`private` = %d AND `item`.`wall` AND `item`.`psid` IN (", self::PRIVATE) . implode(',', $set) . "))";
3484                         } else {
3485                                 $sql_set = '';
3486                         }
3487
3488                         $sql = sprintf(" AND (`item`.`private` != %d", self::PRIVATE) . $sql_set . ")";
3489                 }
3490
3491                 return $sql;
3492         }
3493
3494         /**
3495          * get translated item type
3496          *
3497          * @param $item
3498          * @return string
3499          */
3500         public static function postType($item)
3501         {
3502                 if (!empty($item['event-id'])) {
3503                         return DI::l10n()->t('event');
3504                 } elseif (!empty($item['resource-id'])) {
3505                         return DI::l10n()->t('photo');
3506                 } elseif ($item['gravity'] == GRAVITY_ACTIVITY) {
3507                         return DI::l10n()->t('activity');
3508                 } elseif ($item['gravity'] == GRAVITY_COMMENT) {
3509                         return DI::l10n()->t('comment');
3510                 }
3511
3512                 return DI::l10n()->t('post');
3513         }
3514
3515         /**
3516          * Sets the "rendered-html" field of the provided item
3517          *
3518          * Body is preserved to avoid side-effects as we modify it just-in-time for spoilers and private image links
3519          *
3520          * @param array $item
3521          * @param bool  $update
3522          *
3523          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
3524          * @todo Remove reference, simply return "rendered-html" and "rendered-hash"
3525          */
3526         public static function putInCache(&$item, $update = false)
3527         {
3528                 $body = $item["body"];
3529
3530                 $rendered_hash = $item['rendered-hash'] ?? '';
3531                 $rendered_html = $item['rendered-html'] ?? '';
3532
3533                 if ($rendered_hash == ''
3534                         || $rendered_html == ""
3535                         || $rendered_hash != hash("md5", $item["body"])
3536                         || DI::config()->get("system", "ignore_cache")
3537                 ) {
3538                         self::addRedirToImageTags($item);
3539
3540                         $item["rendered-html"] = BBCode::convert($item["body"]);
3541                         $item["rendered-hash"] = hash("md5", $item["body"]);
3542
3543                         $hook_data = ['item' => $item, 'rendered-html' => $item['rendered-html'], 'rendered-hash' => $item['rendered-hash']];
3544                         Hook::callAll('put_item_in_cache', $hook_data);
3545                         $item['rendered-html'] = $hook_data['rendered-html'];
3546                         $item['rendered-hash'] = $hook_data['rendered-hash'];
3547                         unset($hook_data);
3548
3549                         // Force an update if the generated values differ from the existing ones
3550                         if ($rendered_hash != $item["rendered-hash"]) {
3551                                 $update = true;
3552                         }
3553
3554                         // Only compare the HTML when we forcefully ignore the cache
3555                         if (DI::config()->get("system", "ignore_cache") && ($rendered_html != $item["rendered-html"])) {
3556                                 $update = true;
3557                         }
3558
3559                         if ($update && !empty($item["id"])) {
3560                                 self::update(
3561                                         [
3562                                                 'rendered-html' => $item["rendered-html"],
3563                                                 'rendered-hash' => $item["rendered-hash"]
3564                                         ],
3565                                         ['id' => $item["id"]]
3566                                 );
3567                         }
3568                 }
3569
3570                 $item["body"] = $body;
3571         }
3572
3573         /**
3574          * Find any non-embedded images in private items and add redir links to them
3575          *
3576          * @param array &$item The field array of an item row
3577          */
3578         private static function addRedirToImageTags(array &$item)
3579         {
3580                 $app = DI::app();
3581
3582                 $matches = [];
3583                 $cnt = preg_match_all('|\[img\](http[^\[]*?/photo/[a-fA-F0-9]+?(-[0-9]\.[\w]+?)?)\[\/img\]|', $item['body'], $matches, PREG_SET_ORDER);
3584                 if ($cnt) {
3585                         foreach ($matches as $mtch) {
3586                                 if (strpos($mtch[1], '/redir') !== false) {
3587                                         continue;
3588                                 }
3589
3590                                 if ((local_user() == $item['uid']) && ($item['private'] == self::PRIVATE) && ($item['contact-id'] != $app->contact['id']) && ($item['network'] == Protocol::DFRN)) {
3591                                         $img_url = 'redir/' . $item['contact-id'] . '?url=' . urlencode($mtch[1]);
3592                                         $item['body'] = str_replace($mtch[0], '[img]' . $img_url . '[/img]', $item['body']);
3593                                 }
3594                         }
3595                 }
3596         }
3597
3598         /**
3599          * Given an item array, convert the body element from bbcode to html and add smilie icons.
3600          * If attach is true, also add icons for item attachments.
3601          *
3602          * @param array   $item
3603          * @param boolean $attach
3604          * @param boolean $is_preview
3605          * @return string item body html
3606          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
3607          * @throws \ImagickException
3608          * @hook  prepare_body_init item array before any work
3609          * @hook  prepare_body_content_filter ('item'=>item array, 'filter_reasons'=>string array) before first bbcode to html
3610          * @hook  prepare_body ('item'=>item array, 'html'=>body string, 'is_preview'=>boolean, 'filter_reasons'=>string array) after first bbcode to html
3611          * @hook  prepare_body_final ('item'=>item array, 'html'=>body string) after attach icons and blockquote special case handling (spoiler, author)
3612          */
3613         public static function prepareBody(array &$item, $attach = false, $is_preview = false)
3614         {
3615                 $a = DI::app();
3616                 Hook::callAll('prepare_body_init', $item);
3617
3618                 // In order to provide theme developers more possibilities, event items
3619                 // are treated differently.
3620                 if ($item['object-type'] === Activity\ObjectType::EVENT && isset($item['event-id'])) {
3621                         $ev = Event::getItemHTML($item);
3622                         return $ev;
3623                 }
3624
3625                 $tags = Tag::populateFromItem($item);
3626
3627                 $item['tags'] = $tags['tags'];
3628                 $item['hashtags'] = $tags['hashtags'];
3629                 $item['mentions'] = $tags['mentions'];
3630
3631                 // Compile eventual content filter reasons
3632                 $filter_reasons = [];
3633                 if (!$is_preview && public_contact() != $item['author-id']) {
3634                         if (!empty($item['content-warning']) && (!local_user() || !DI::pConfig()->get(local_user(), 'system', 'disable_cw', false))) {
3635                                 $filter_reasons[] = DI::l10n()->t('Content warning: %s', $item['content-warning']);
3636                         }
3637
3638                         $hook_data = [
3639                                 'item' => $item,
3640                                 'filter_reasons' => $filter_reasons
3641                         ];
3642                         Hook::callAll('prepare_body_content_filter', $hook_data);
3643                         $filter_reasons = $hook_data['filter_reasons'];
3644                         unset($hook_data);
3645                 }
3646
3647                 // Update the cached values if there is no "zrl=..." on the links.
3648                 $update = (!Session::isAuthenticated() && ($item["uid"] == 0));
3649
3650                 // Or update it if the current viewer is the intented viewer.
3651                 if (($item["uid"] == local_user()) && ($item["uid"] != 0)) {
3652                         $update = true;
3653                 }
3654
3655                 self::putInCache($item, $update);
3656                 $s = $item["rendered-html"];
3657
3658                 $hook_data = [
3659                         'item' => $item,
3660                         'html' => $s,
3661                         'preview' => $is_preview,
3662                         'filter_reasons' => $filter_reasons
3663                 ];
3664                 Hook::callAll('prepare_body', $hook_data);
3665                 $s = $hook_data['html'];
3666                 unset($hook_data);
3667
3668                 if (!$attach) {
3669                         // Replace the blockquotes with quotes that are used in mails.
3670                         $mailquote = '<blockquote type="cite" class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">';
3671                         $s = str_replace(['<blockquote>', '<blockquote class="spoiler">', '<blockquote class="author">'], [$mailquote, $mailquote, $mailquote], $s);
3672                         return $s;
3673                 }
3674
3675                 $as = '';
3676                 $vhead = false;
3677                 foreach (Post\Media::getByURIId($item['uri-id'], [Post\Media::DOCUMENT, Post\Media::TORRENT, Post\Media::UNKNOWN]) as $attachment) {
3678                         $mime = $attachment['mimetype'];
3679
3680                         $the_url = Contact::magicLinkById($item['author-id'], $attachment['url']);
3681
3682                         if (strpos($mime, 'video') !== false) {
3683                                 if (!$vhead) {
3684                                         $vhead = true;
3685                                         DI::page()['htmlhead'] .= Renderer::replaceMacros(Renderer::getMarkupTemplate('videos_head.tpl'));
3686                                 }
3687
3688                                 $as .= Renderer::replaceMacros(Renderer::getMarkupTemplate('video_top.tpl'), [
3689                                         '$video' => [
3690                                                 'id'     => $item['author-id'],
3691                                                 'title'  => DI::l10n()->t('View Video'),
3692                                                 'src'    => $the_url,
3693                                                 'mime'   => $mime,
3694                                         ],
3695                                 ]);
3696                         }
3697
3698                         $filetype = strtolower(substr($mime, 0, strpos($mime, '/')));
3699                         if ($filetype) {
3700                                 $filesubtype = strtolower(substr($mime, strpos($mime, '/') + 1));
3701                                 $filesubtype = str_replace('.', '-', $filesubtype);
3702                         } else {
3703                                 $filetype = 'unkn';
3704                                 $filesubtype = 'unkn';
3705                         }
3706
3707                         $title = Strings::escapeHtml(trim(($attachment['description'] ?? '') ?: $attachment['url']));
3708                         $title .= ' ' . ($attachment['size'] ?? 0) . ' ' . DI::l10n()->t('bytes');
3709
3710                         $icon = '<div class="attachtype icon s22 type-' . $filetype . ' subtype-' . $filesubtype . '"></div>';
3711                         $as .= '<a href="' . strip_tags($the_url) . '" title="' . $title . '" class="attachlink" target="_blank" rel="noopener noreferrer" >' . $icon . '</a>';
3712                 }
3713
3714                 if ($as != '') {
3715                         $s .= '<div class="body-attach">'.$as.'<div class="clear"></div></div>';
3716                 }
3717
3718                 // Map.
3719                 if (strpos($s, '<div class="map">') !== false && !empty($item['coord'])) {
3720                         $x = Map::byCoordinates(trim($item['coord']));
3721                         if ($x) {
3722                                 $s = preg_replace('/\<div class\=\"map\"\>/', '$0' . $x, $s);
3723                         }
3724                 }
3725
3726                 // Replace friendica image url size with theme preference.
3727                 if (!empty($a->theme_info['item_image_size'])) {
3728                         $ps = $a->theme_info['item_image_size'];
3729                         $s = preg_replace('|(<img[^>]+src="[^"]+/photo/[0-9a-f]+)-[0-9]|', "$1-" . $ps, $s);
3730                 }
3731
3732                 $s = HTML::applyContentFilter($s, $filter_reasons);
3733
3734                 $hook_data = ['item' => $item, 'html' => $s];
3735                 Hook::callAll('prepare_body_final', $hook_data);
3736
3737                 return $hook_data['html'];
3738         }
3739
3740         /**
3741          * get private link for item
3742          *
3743          * @param array $item
3744          * @return boolean|array False if item has not plink, otherwise array('href'=>plink url, 'title'=>translated title)
3745          * @throws \Exception
3746          */
3747         public static function getPlink($item)
3748         {
3749                 if (local_user()) {
3750                         $ret = [
3751                                 'href' => "display/" . $item['guid'],
3752                                 'orig' => "display/" . $item['guid'],
3753                                 'title' => DI::l10n()->t('View on separate page'),
3754                                 'orig_title' => DI::l10n()->t('view on separate page'),
3755                         ];
3756
3757                         if (!empty($item['plink'])) {
3758                                 $ret["href"] = DI::baseUrl()->remove($item['plink']);
3759                                 $ret["title"] = DI::l10n()->t('link to source');
3760                         }
3761                 } elseif (!empty($item['plink']) && ($item['private'] != self::PRIVATE)) {
3762                         $ret = [
3763                                 'href' => $item['plink'],
3764                                 'orig' => $item['plink'],
3765                                 'title' => DI::l10n()->t('link to source'),
3766                         ];
3767                 } else {
3768                         $ret = [];
3769                 }
3770
3771                 return $ret;
3772         }
3773
3774         /**
3775          * Is the given item array a post that is sent as starting post to a forum?
3776          *
3777          * @param array $item
3778          * @param array $owner
3779          *
3780          * @return boolean "true" when it is a forum post
3781          */
3782         public static function isForumPost(array $item, array $owner = [])
3783         {
3784                 if (empty($owner)) {
3785                         $owner = User::getOwnerDataById($item['uid']);
3786                         if (empty($owner)) {
3787                                 return false;
3788                         }
3789                 }
3790
3791                 if (($item['author-id'] == $item['owner-id']) ||
3792                         ($owner['id'] == $item['contact-id']) ||
3793                         ($item['uri'] != $item['parent-uri']) ||
3794                         $item['origin']) {
3795                         return false;
3796                 }
3797
3798                 return Contact::isForum($item['contact-id']);
3799         }
3800
3801         /**
3802          * Search item id for given URI or plink
3803          *
3804          * @param string $uri
3805          * @param integer $uid
3806          *
3807          * @return integer item id
3808          */
3809         public static function searchByLink($uri, $uid = 0)
3810         {
3811                 $ssl_uri = str_replace('http://', 'https://', $uri);
3812                 $uris = [$uri, $ssl_uri, Strings::normaliseLink($uri)];
3813
3814                 $item = DBA::selectFirst('item', ['id'], ['uri' => $uris, 'uid' => $uid]);
3815                 if (DBA::isResult($item)) {
3816                         return $item['id'];
3817                 }
3818
3819                 $itemcontent = DBA::selectFirst('item-content', ['uri-id'], ['plink' => $uris]);
3820                 if (!DBA::isResult($itemcontent)) {
3821                         return 0;
3822                 }
3823
3824                 $itemuri = DBA::selectFirst('item-uri', ['uri'], ['id' => $itemcontent['uri-id']]);
3825                 if (!DBA::isResult($itemuri)) {
3826                         return 0;
3827                 }
3828
3829                 $item = DBA::selectFirst('item', ['id'], ['uri' => $itemuri['uri'], 'uid' => $uid]);
3830                 if (DBA::isResult($item)) {
3831                         return $item['id'];
3832                 }
3833
3834                 return 0;
3835         }
3836
3837         /**
3838          * Return the URI for a link to the post
3839          *
3840          * @param string $uri URI or link to post
3841          *
3842          * @return string URI
3843          */
3844         public static function getURIByLink(string $uri)
3845         {
3846                 $ssl_uri = str_replace('http://', 'https://', $uri);
3847                 $uris = [$uri, $ssl_uri, Strings::normaliseLink($uri)];
3848
3849                 $item = DBA::selectFirst('item', ['uri'], ['uri' => $uris]);
3850                 if (DBA::isResult($item)) {
3851                         return $item['uri'];
3852                 }
3853
3854                 $itemcontent = DBA::selectFirst('item-content', ['uri-id'], ['plink' => $uris]);
3855                 if (!DBA::isResult($itemcontent)) {
3856                         return '';
3857                 }
3858
3859                 $itemuri = DBA::selectFirst('item-uri', ['uri'], ['id' => $itemcontent['uri-id']]);
3860                 if (DBA::isResult($itemuri)) {
3861                         return $itemuri['uri'];
3862                 }
3863
3864                 return '';
3865         }
3866
3867         /**
3868          * Fetches item for given URI or plink
3869          *
3870          * @param string $uri
3871          * @param integer $uid
3872          *
3873          * @return integer item id
3874          */
3875         public static function fetchByLink(string $uri, int $uid = 0)
3876         {
3877                 Logger::info('Trying to fetch link', ['uid' => $uid, 'uri' => $uri]);
3878                 $item_id = self::searchByLink($uri, $uid);
3879                 if (!empty($item_id)) {
3880                         Logger::info('Link found', ['uid' => $uid, 'uri' => $uri, 'id' => $item_id]);
3881                         return $item_id;
3882                 }
3883
3884                 if ($fetched_uri = ActivityPub\Processor::fetchMissingActivity($uri)) {
3885                         $item_id = self::searchByLink($fetched_uri, $uid);
3886                 } else {
3887                         $item_id = Diaspora::fetchByURL($uri);
3888                 }
3889
3890                 if (!empty($item_id)) {
3891                         Logger::info('Link fetched', ['uid' => $uid, 'uri' => $uri, 'id' => $item_id]);
3892                         return $item_id;
3893                 }
3894
3895                 Logger::info('Link not found', ['uid' => $uid, 'uri' => $uri]);
3896                 return 0;
3897         }
3898
3899         /**
3900          * Return share data from an item array (if the item is shared item)
3901          * We are providing the complete Item array, because at some time in the future
3902          * we hopefully will define these values not in the body anymore but in some item fields.
3903          * This function is meant to replace all similar functions in the system.
3904          *
3905          * @param array $item
3906          *
3907          * @return array with share information
3908          */
3909         public static function getShareArray($item)
3910         {
3911                 if (!preg_match("/(.*?)\[share(.*?)\]\s?(.*?)\s?\[\/share\]\s?/ism", $item['body'], $matches)) {
3912                         return [];
3913                 }
3914
3915                 $attribute_string = $matches[2];
3916                 $attributes = ['comment' => trim($matches[1]), 'shared' => trim($matches[3])];
3917                 foreach (['author', 'profile', 'avatar', 'guid', 'posted', 'link'] as $field) {
3918                         if (preg_match("/$field=(['\"])(.+?)\\1/ism", $attribute_string, $matches)) {
3919                                 $attributes[$field] = trim(html_entity_decode($matches[2] ?? '', ENT_QUOTES, 'UTF-8'));
3920                         }
3921                 }
3922                 return $attributes;
3923         }
3924
3925         /**
3926          * Fetch item information for shared items from the original items and adds it.
3927          *
3928          * @param array $item
3929          *
3930          * @return array item array with data from the original item
3931          */
3932         public static function addShareDataFromOriginal(array $item)
3933         {
3934                 $shared = self::getShareArray($item);
3935                 if (empty($shared)) {
3936                         return $item;
3937                 }
3938
3939                 // Real reshares always have got a GUID.
3940                 if (empty($shared['guid'])) {
3941                         return $item;
3942                 }
3943
3944                 $uid = $item['uid'] ?? 0;
3945
3946                 // first try to fetch the item via the GUID. This will work for all reshares that had been created on this system
3947                 $shared_item = self::selectFirst(['title', 'body'], ['guid' => $shared['guid'], 'uid' => [0, $uid]]);
3948                 if (!DBA::isResult($shared_item)) {
3949                         if (empty($shared['link'])) {
3950                                 return $item;
3951                         }
3952
3953                         // Otherwhise try to find (and possibly fetch) the item via the link. This should work for Diaspora and ActivityPub posts
3954                         $id = self::fetchByLink($shared['link'] ?? '', $uid);
3955                         if (empty($id)) {
3956                                 Logger::info('Original item not found', ['url' => $shared['link'] ?? '', 'callstack' => System::callstack()]);
3957                                 return $item;
3958                         }
3959
3960                         $shared_item = self::selectFirst(['title', 'body'], ['id' => $id]);
3961                         if (!DBA::isResult($shared_item)) {
3962                                 return $item;
3963                         }
3964                         Logger::info('Got shared data from url', ['url' => $shared['link'], 'callstack' => System::callstack()]);
3965                 } else {
3966                         Logger::info('Got shared data from guid', ['guid' => $shared['guid'], 'callstack' => System::callstack()]);
3967                 }
3968
3969                 if (!empty($shared_item['title'])) {
3970                         $body = '[h3]' . $shared_item['title'] . "[/h3]\n" . $shared_item['body'];
3971                         unset($shared_item['title']);
3972                 } else {
3973                         $body = $shared_item['body'];
3974                 }
3975
3976                 $item['body'] = preg_replace("/\[share ([^\[\]]*)\].*\[\/share\]/ism", '[share $1]' . $body . '[/share]', $item['body']);
3977                 unset($shared_item['body']);
3978
3979                 return array_merge($item, $shared_item);
3980         }
3981
3982         /**
3983          * Check a prospective item array against user-level permissions
3984          *
3985          * @param array $item Expected keys: uri, gravity, and
3986          *                    author-link if is author-id is set,
3987          *                    owner-link if is owner-id is set,
3988          *                    causer-link if is causer-id is set.
3989          * @param int   $user_id Local user ID
3990          * @return bool
3991          * @throws \Exception
3992          */
3993         protected static function isAllowedByUser(array $item, int $user_id)
3994         {
3995                 if (!empty($item['author-id']) && Contact\User::isBlocked($item['author-id'], $user_id)) {
3996                         Logger::notice('Author is blocked by user', ['author-link' => $item['author-link'], 'uid' => $user_id, 'item-uri' => $item['uri']]);
3997                         return false;
3998                 }
3999
4000                 if (!empty($item['owner-id']) && Contact\User::isBlocked($item['owner-id'], $user_id)) {
4001                         Logger::notice('Owner is blocked by user', ['owner-link' => $item['owner-link'], 'uid' => $user_id, 'item-uri' => $item['uri']]);
4002                         return false;
4003                 }
4004
4005                 // The causer is set during a thread completion, for example because of a reshare. It countains the responsible actor.
4006                 if (!empty($item['causer-id']) && Contact\User::isBlocked($item['causer-id'], $user_id)) {
4007                         Logger::notice('Causer is blocked by user', ['causer-link' => $item['causer-link'] ?? $item['causer-id'], 'uid' => $user_id, 'item-uri' => $item['uri']]);
4008                         return false;
4009                 }
4010
4011                 if (!empty($item['causer-id']) && ($item['gravity'] === GRAVITY_PARENT) && Contact\User::isIgnored($item['causer-id'], $user_id)) {
4012                         Logger::notice('Causer is ignored by user', ['causer-link' => $item['causer-link'] ?? $item['causer-id'], 'uid' => $user_id, 'item-uri' => $item['uri']]);
4013                         return false;
4014                 }
4015
4016                 return true;
4017         }
4018 }