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