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\Core\Worker;
  33 use Friendica\Database\DBA;
  34 use Friendica\Database\DBStructure;
  35 use Friendica\DI;
  36 use Friendica\Model\Post\Category;
  37 use Friendica\Protocol\Activity;
  38 use Friendica\Protocol\ActivityPub;
  39 use Friendica\Protocol\Diaspora;
  40 use Friendica\Util\DateTimeFormat;
  41 use Friendica\Util\Map;
  42 use Friendica\Util\Network;
  43 use Friendica\Util\Security;
  44 use Friendica\Util\Strings;
  45 use Friendica\Worker\Delivery;
  46 use Text_LanguageDetect;
  47 use Friendica\Repository\PermissionSet as RepPermissionSet;
  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_PERSONAL_NOTE = 128;
  61
  62         // Field list that is used to display the items
  63         const DISPLAY_FIELDLIST = [
  64                 'uid', 'id', 'parent', 'uri-id', 'uri', 'thr-parent', 'parent-uri', 'guid', 'network', 'gravity',
  65                 'commented', 'created', 'edited', 'received', 'verb', 'object-type', 'postopts', 'plink',
  66                 'wall', 'private', 'starred', 'origin', 'title', 'body', 'file', 'attach', 'language',
  67                 'content-warning', 'location', 'coord', 'app', 'rendered-hash', 'rendered-html', 'object',
  68                 'allow_cid', 'allow_gid', 'deny_cid', 'deny_gid', 'item_id',
  69                 'author-id', 'author-link', 'author-name', 'author-avatar', 'author-network',
  70                 'owner-id', 'owner-link', 'owner-name', 'owner-avatar', 'owner-network',
  71                 'contact-id', 'contact-uid', 'contact-link', 'contact-name', 'contact-avatar',
  72                 'writable', 'self', 'cid', 'alias', 'pinned',
  73                 'event-id', 'event-created', 'event-edited', 'event-start', 'event-finish',
  74                 'event-summary', 'event-desc', 'event-location', 'event-type',
  75                 'event-nofinish', 'event-adjust', 'event-ignore', 'event-id',
  76                 'delivery_queue_count', 'delivery_queue_done', 'delivery_queue_failed'
  77         ];
  78
  79         // Field list that is used to deliver items via the protocols
  80         const DELIVER_FIELDLIST = ['uid', 'id', 'parent', 'uri-id', 'uri', 'thr-parent', 'parent-uri', 'guid',
  81                         'parent-guid', 'created', 'edited', 'verb', 'object-type', 'object', 'target',
  82                         'private', 'title', 'body', 'location', 'coord', 'app',
  83                         'attach', 'deleted', 'extid', 'post-type', 'gravity',
  84                         'allow_cid', 'allow_gid', 'deny_cid', 'deny_gid',
  85                         'author-id', 'author-link', 'owner-link', 'contact-uid',
  86                         'signed_text', 'signature', 'signer', 'network'];
  87
  88         // Field list for "item-content" table that is mixed with the item table
  89         const MIXED_CONTENT_FIELDLIST = ['title', 'content-warning', 'body', 'location',
  90                         'coord', 'app', 'rendered-hash', 'rendered-html', 'verb',
  91                         'object-type', 'object', 'target-type', 'target', 'plink'];
  92
  93         // Field list for "item-content" table that is not present in the "item" table
  94         const CONTENT_FIELDLIST = ['language'];
  95
  96         // All fields in the item table
  97         const ITEM_FIELDLIST = ['id', 'uid', 'parent', 'uri', 'parent-uri', 'thr-parent',
  98                         'guid', 'uri-id', 'parent-uri-id', 'thr-parent-id', 'vid',
  99                         'contact-id', 'type', 'wall', 'gravity', 'extid', 'icid', 'psid',
 100                         'created', 'edited', 'commented', 'received', 'changed', 'verb',
 101                         'postopts', 'plink', 'resource-id', 'event-id', 'attach', 'inform',
 102                         'file', 'allow_cid', 'allow_gid', 'deny_cid', 'deny_gid', 'post-type',
 103                         'private', 'pubmail', 'moderated', 'visible', 'starred', 'bookmark',
 104                         'unseen', 'deleted', 'origin', 'forum_mode', 'mention', 'global', 'network',
 105                         'title', 'content-warning', 'body', 'location', 'coord', 'app',
 106                         'rendered-hash', 'rendered-html', 'object-type', 'object', 'target-type', 'target',
 107                         'author-id', 'author-link', 'author-name', 'author-avatar', 'author-network',
 108                         'owner-id', 'owner-link', 'owner-name', 'owner-avatar'];
 109
 110         // List of all verbs that don't need additional content data.
 111         // Never reorder or remove entries from this list. Just add new ones at the end, if needed.
 112         const ACTIVITIES = [
 113                 Activity::LIKE, Activity::DISLIKE,
 114                 Activity::ATTEND, Activity::ATTENDNO, Activity::ATTENDMAYBE,
 115                 Activity::FOLLOW,
 116                 Activity::ANNOUNCE];
 117
 118         const PUBLIC = 0;
 119         const PRIVATE = 1;
 120         const UNLISTED = 2;
 121
 122         const TABLES = ['item', 'user-item', 'item-content', 'post-delivery-data', 'diaspora-interaction'];
 123
 124         private static $legacy_mode = null;
 125
 126         private static function getItemFields()
 127         {
 128                 $definition = DBStructure::definition('', false);
 129
 130                 $postfields = [];
 131                 foreach (self::TABLES as $table) {
 132                         $postfields[$table] = array_keys($definition[$table]['fields']);
 133                 }
 134
 135                 return $postfields;
 136         }
 137
 138         public static function isLegacyMode()
 139         {
 140                 if (is_null(self::$legacy_mode)) {
 141                         self::$legacy_mode = (DI::config()->get("system", "post_update_version") < 1279);
 142                 }
 143
 144                 return self::$legacy_mode;
 145         }
 146
 147         /**
 148          * Set the pinned state of an item
 149          *
 150          * @param integer $iid    Item ID
 151          * @param integer $uid    User ID
 152          * @param boolean $pinned Pinned state
 153          */
 154         public static function setPinned(int $iid, int $uid, bool $pinned)
 155         {
 156                 DBA::update('user-item', ['pinned' => $pinned], ['iid' => $iid, 'uid' => $uid], true);
 157         }
 158
 159         /**
 160          * Get the pinned state
 161          *
 162          * @param integer $iid Item ID
 163          * @param integer $uid User ID
 164          *
 165          * @return boolean pinned state
 166          */
 167         public static function getPinned(int $iid, int $uid)
 168         {
 169                 $useritem = DBA::selectFirst('user-item', ['pinned'], ['iid' => $iid, 'uid' => $uid]);
 170                 if (!DBA::isResult($useritem)) {
 171                         return false;
 172                 }
 173                 return (bool)$useritem['pinned'];
 174         }
 175
 176         /**
 177          * Select pinned rows from the item table for a given user
 178          *
 179          * @param integer $uid       User ID
 180          * @param array   $selected  Array of selected fields, empty for all
 181          * @param array   $condition Array of fields for condition
 182          * @param array   $params    Array of several parameters
 183          *
 184          * @return boolean|object
 185          * @throws \Exception
 186          */
 187         public static function selectPinned(int $uid, array $selected = [], array $condition = [], $params = [])
 188         {
 189                 $useritems = DBA::select('user-item', ['iid'], ['uid' => $uid, 'pinned' => true]);
 190                 if (!DBA::isResult($useritems)) {
 191                         return $useritems;
 192                 }
 193
 194                 $pinned = [];
 195                 while ($useritem = DBA::fetch($useritems)) {
 196                         $pinned[] = $useritem['iid'];
 197                 }
 198                 DBA::close($useritems);
 199
 200                 if (empty($pinned)) {
 201                         return [];
 202                 }
 203
 204                 if (empty($condition) || !is_array($condition)) {
 205                         $condition = ['iid' => $pinned];
 206                 } else {
 207                         reset($condition);
 208                         $first_key = key($condition);
 209                         if (!is_int($first_key)) {
 210                                 $condition['iid'] = $pinned;
 211                         } else {
 212                                 $values_string = substr(str_repeat("?, ", count($pinned)), 0, -2);
 213                                 $condition[0] = '(' . $condition[0] . ") AND `iid` IN (" . $values_string . ")";
 214                                 $condition = array_merge($condition, $pinned);
 215                         }
 216                 }
 217
 218                 return self::selectThreadForUser($uid, $selected, $condition, $params);
 219         }
 220
 221         /**
 222          * Fetch a single item row
 223          *
 224          * @param mixed $stmt statement object
 225          * @return array current row
 226          */
 227         public static function fetch($stmt)
 228         {
 229                 $row = DBA::fetch($stmt);
 230
 231                 if (is_bool($row)) {
 232                         return $row;
 233                 }
 234
 235                 // ---------------------- Transform item structure data ----------------------
 236
 237                 // We prefer the data from the user's contact over the public one
 238                 if (!empty($row['author-link']) && !empty($row['contact-link']) &&
 239                         ($row['author-link'] == $row['contact-link'])) {
 240                         if (isset($row['author-avatar']) && !empty($row['contact-avatar'])) {
 241                                 $row['author-avatar'] = $row['contact-avatar'];
 242                         }
 243                         if (isset($row['author-name']) && !empty($row['contact-name'])) {
 244                                 $row['author-name'] = $row['contact-name'];
 245                         }
 246                 }
 247
 248                 if (!empty($row['owner-link']) && !empty($row['contact-link']) &&
 249                         ($row['owner-link'] == $row['contact-link'])) {
 250                         if (isset($row['owner-avatar']) && !empty($row['contact-avatar'])) {
 251                                 $row['owner-avatar'] = $row['contact-avatar'];
 252                         }
 253                         if (isset($row['owner-name']) && !empty($row['contact-name'])) {
 254                                 $row['owner-name'] = $row['contact-name'];
 255                         }
 256                 }
 257
 258                 // We can always comment on posts from these networks
 259                 if (array_key_exists('writable', $row) &&
 260                         in_array($row['internal-network'], Protocol::FEDERATED)) {
 261                         $row['writable'] = true;
 262                 }
 263
 264                 // ---------------------- Transform item content data ----------------------
 265
 266                 // Fetch data from the item-content table whenever there is content there
 267                 if (self::isLegacyMode()) {
 268                         $legacy_fields = array_merge(Post\DeliveryData::LEGACY_FIELD_LIST, self::MIXED_CONTENT_FIELDLIST);
 269                         foreach ($legacy_fields as $field) {
 270                                 if (empty($row[$field]) && !empty($row['internal-item-' . $field])) {
 271                                         $row[$field] = $row['internal-item-' . $field];
 272                                 }
 273                                 unset($row['internal-item-' . $field]);
 274                         }
 275                 }
 276
 277                 if (array_key_exists('verb', $row)) {
 278                         if (!is_null($row['internal-verb'])) {
 279                                 $row['verb'] = $row['internal-verb'];
 280                         }
 281
 282                         if (in_array($row['verb'], self::ACTIVITIES)) {
 283                                 if (array_key_exists('title', $row)) {
 284                                         $row['title'] = '';
 285                                 }
 286                                 if (array_key_exists('body', $row)) {
 287                                         $row['body'] = $row['verb'];
 288                                 }
 289                                 if (array_key_exists('object', $row)) {
 290                                         $row['object'] = '';
 291                                 }
 292                                 if (array_key_exists('object-type', $row)) {
 293                                         $row['object-type'] = Activity\ObjectType::NOTE;
 294                                 }
 295                         } elseif (in_array($row['verb'], ['', Activity::POST, Activity::SHARE])) {
 296                                 // Posts don't have a target - but having tags or files.
 297                                 if (array_key_exists('target', $row)) {
 298                                         $row['target'] = '';
 299                                 }
 300                         }
 301                 }
 302
 303                 if (array_key_exists('vid', $row) && is_null($row['vid']) && !empty($row['verb'])) {
 304                         $row['vid'] = Verb::getID($row['verb']);
 305                 }
 306
 307                 if (!array_key_exists('verb', $row) || in_array($row['verb'], ['', Activity::POST, Activity::SHARE])) {
 308                         // Build the file string out of the term entries
 309                         if (array_key_exists('file', $row) && empty($row['file'])) {
 310                                 $row['file'] = Category::getTextByURIId($row['internal-uri-id'], $row['internal-uid']);
 311                         }
 312                 }
 313
 314                 if ($row['internal-psid'] == RepPermissionSet::PUBLIC) {
 315                         if (array_key_exists('allow_cid', $row)) {
 316                                 $row['allow_cid'] = '';
 317                         }
 318                         if (array_key_exists('allow_gid', $row)) {
 319                                 $row['allow_gid'] = '';
 320                         }
 321                         if (array_key_exists('deny_cid', $row)) {
 322                                 $row['deny_cid'] = '';
 323                         }
 324                         if (array_key_exists('deny_gid', $row)) {
 325                                 $row['deny_gid'] = '';
 326                         }
 327                 }
 328
 329                 if (array_key_exists('ignored', $row) && array_key_exists('internal-user-ignored', $row) && !is_null($row['internal-user-ignored'])) {
 330                         $row['ignored'] = $row['internal-user-ignored'];
 331                 }
 332
 333                 // Remove internal fields
 334                 unset($row['internal-network']);
 335                 unset($row['internal-uri-id']);
 336                 unset($row['internal-uid']);
 337                 unset($row['internal-psid']);
 338                 unset($row['internal-verb']);
 339                 unset($row['internal-user-ignored']);
 340                 unset($row['interaction']);
 341
 342                 return $row;
 343         }
 344
 345         /**
 346          * Fills an array with data from an item query
 347          *
 348          * @param object $stmt statement object
 349          * @param bool   $do_close
 350          * @return array Data array
 351          */
 352         public static function inArray($stmt, $do_close = true) {
 353                 if (is_bool($stmt)) {
 354                         return $stmt;
 355                 }
 356
 357                 $data = [];
 358                 while ($row = self::fetch($stmt)) {
 359                         $data[] = $row;
 360                 }
 361                 if ($do_close) {
 362                         DBA::close($stmt);
 363                 }
 364                 return $data;
 365         }
 366
 367         /**
 368          * Check if item data exists
 369          *
 370          * @param array $condition array of fields for condition
 371          *
 372          * @return boolean Are there rows for that condition?
 373          * @throws \Exception
 374          */
 375         public static function exists($condition) {
 376                 $stmt = self::select(['id'], $condition, ['limit' => 1]);
 377
 378                 if (is_bool($stmt)) {
 379                         $retval = $stmt;
 380                 } else {
 381                         $retval = (DBA::numRows($stmt) > 0);
 382                 }
 383
 384                 DBA::close($stmt);
 385
 386                 return $retval;
 387         }
 388
 389         /**
 390          * Retrieve a single record from the item table for a given user and returns it in an associative array
 391          *
 392          * @param integer $uid User ID
 393          * @param array   $selected
 394          * @param array   $condition
 395          * @param array   $params
 396          * @return bool|array
 397          * @throws \Exception
 398          * @see   DBA::select
 399          */
 400         public static function selectFirstForUser($uid, array $selected = [], array $condition = [], $params = [])
 401         {
 402                 $params['uid'] = $uid;
 403
 404                 if (empty($selected)) {
 405                         $selected = Item::DISPLAY_FIELDLIST;
 406                 }
 407
 408                 return self::selectFirst($selected, $condition, $params);
 409         }
 410
 411         /**
 412          * Select rows from the item table for a given user
 413          *
 414          * @param integer $uid       User ID
 415          * @param array   $selected  Array of selected fields, empty for all
 416          * @param array   $condition Array of fields for condition
 417          * @param array   $params    Array of several parameters
 418          *
 419          * @return boolean|object
 420          * @throws \Exception
 421          */
 422         public static function selectForUser($uid, array $selected = [], array $condition = [], $params = [])
 423         {
 424                 $params['uid'] = $uid;
 425
 426                 if (empty($selected)) {
 427                         $selected = Item::DISPLAY_FIELDLIST;
 428                 }
 429
 430                 return self::select($selected, $condition, $params);
 431         }
 432
 433         /**
 434          * Retrieve a single record from the item table and returns it in an associative array
 435          *
 436          * @param array $fields
 437          * @param array $condition
 438          * @param array $params
 439          * @return bool|array
 440          * @throws \Exception
 441          * @see   DBA::select
 442          */
 443         public static function selectFirst(array $fields = [], array $condition = [], $params = [])
 444         {
 445                 $params['limit'] = 1;
 446
 447                 $result = self::select($fields, $condition, $params);
 448
 449                 if (is_bool($result)) {
 450                         return $result;
 451                 } else {
 452                         $row = self::fetch($result);
 453                         DBA::close($result);
 454                         return $row;
 455                 }
 456         }
 457
 458         /**
 459          * Select rows from the item table and returns them as an array
 460          *
 461          * @param array $selected  Array of selected fields, empty for all
 462          * @param array $condition Array of fields for condition
 463          * @param array $params    Array of several parameters
 464          *
 465          * @return array
 466          * @throws \Exception
 467          */
 468         public static function selectToArray(array $fields = [], array $condition = [], $params = [])
 469         {
 470                 $result = self::select($fields, $condition, $params);
 471
 472                 if (is_bool($result)) {
 473                         return [];
 474                 }
 475
 476                 $data = [];
 477                 while ($row = self::fetch($result)) {
 478                         $data[] = $row;
 479                 }
 480                 DBA::close($result);
 481
 482                 return $data;
 483         }
 484
 485         /**
 486          * Select rows from the item table
 487          *
 488          * @param array $selected  Array of selected fields, empty for all
 489          * @param array $condition Array of fields for condition
 490          * @param array $params    Array of several parameters
 491          *
 492          * @return boolean|object
 493          * @throws \Exception
 494          */
 495         public static function select(array $selected = [], array $condition = [], $params = [])
 496         {
 497                 $uid = 0;
 498                 $usermode = false;
 499
 500                 if (isset($params['uid'])) {
 501                         $uid = $params['uid'];
 502                         $usermode = true;
 503                 }
 504
 505                 $fields = self::fieldlist($usermode);
 506
 507                 $select_fields = self::constructSelectFields($fields, $selected);
 508
 509                 $condition_string = DBA::buildCondition($condition);
 510
 511                 $condition_string = self::addTablesToFields($condition_string, $fields);
 512
 513                 if ($usermode) {
 514                         $condition_string = $condition_string . ' AND ' . self::condition(false);
 515                 }
 516
 517                 $param_string = self::addTablesToFields(DBA::buildParameter($params), $fields);
 518
 519                 $table = "`item` " . self::constructJoins($uid, $select_fields . $condition_string . $param_string, false, $usermode);
 520
 521                 $sql = "SELECT " . $select_fields . " FROM " . $table . $condition_string . $param_string;
 522
 523                 return DBA::p($sql, $condition);
 524         }
 525
 526         /**
 527          * Select rows from the starting post in the item table
 528          *
 529          * @param integer $uid       User ID
 530          * @param array   $selected
 531          * @param array   $condition Array of fields for condition
 532          * @param array   $params    Array of several parameters
 533          *
 534          * @return boolean|object
 535          * @throws \Exception
 536          */
 537         public static function selectThreadForUser($uid, array $selected = [], array $condition = [], $params = [])
 538         {
 539                 $params['uid'] = $uid;
 540
 541                 if (empty($selected)) {
 542                         $selected = Item::DISPLAY_FIELDLIST;
 543                 }
 544
 545                 return self::selectThread($selected, $condition, $params);
 546         }
 547
 548         /**
 549          * Retrieve a single record from the starting post in the item table and returns it in an associative array
 550          *
 551          * @param integer $uid User ID
 552          * @param array   $selected
 553          * @param array   $condition
 554          * @param array   $params
 555          * @return bool|array
 556          * @throws \Exception
 557          * @see   DBA::select
 558          */
 559         public static function selectFirstThreadForUser($uid, array $selected = [], array $condition = [], $params = [])
 560         {
 561                 $params['uid'] = $uid;
 562
 563                 if (empty($selected)) {
 564                         $selected = Item::DISPLAY_FIELDLIST;
 565                 }
 566
 567                 return self::selectFirstThread($selected, $condition, $params);
 568         }
 569
 570         /**
 571          * Retrieve a single record from the starting post in the item table and returns it in an associative array
 572          *
 573          * @param array $fields
 574          * @param array $condition
 575          * @param array $params
 576          * @return bool|array
 577          * @throws \Exception
 578          * @see   DBA::select
 579          */
 580         public static function selectFirstThread(array $fields = [], array $condition = [], $params = [])
 581         {
 582                 $params['limit'] = 1;
 583                 $result = self::selectThread($fields, $condition, $params);
 584
 585                 if (is_bool($result)) {
 586                         return $result;
 587                 } else {
 588                         $row = self::fetch($result);
 589                         DBA::close($result);
 590                         return $row;
 591                 }
 592         }
 593
 594         /**
 595          * Select rows from the starting post in the item table
 596          *
 597          * @param array $selected  Array of selected fields, empty for all
 598          * @param array $condition Array of fields for condition
 599          * @param array $params    Array of several parameters
 600          *
 601          * @return boolean|object
 602          * @throws \Exception
 603          */
 604         public static function selectThread(array $selected = [], array $condition = [], $params = [])
 605         {
 606                 $uid = 0;
 607                 $usermode = false;
 608
 609                 if (isset($params['uid'])) {
 610                         $uid = $params['uid'];
 611                         $usermode = true;
 612                 }
 613
 614                 $fields = self::fieldlist($usermode);
 615
 616                 $fields['thread'] = ['mention', 'ignored', 'iid'];
 617
 618                 $threadfields = ['thread' => ['iid', 'uid', 'contact-id', 'owner-id', 'author-id',
 619                         'created', 'edited', 'commented', 'received', 'changed', 'wall', 'private',
 620                         'pubmail', 'moderated', 'visible', 'starred', 'ignored', 'post-type',
 621                         'unseen', 'deleted', 'origin', 'forum_mode', 'mention', 'network']];
 622
 623                 $select_fields = self::constructSelectFields($fields, $selected);
 624
 625                 $condition_string = DBA::buildCondition($condition);
 626
 627                 $condition_string = self::addTablesToFields($condition_string, $threadfields);
 628                 $condition_string = self::addTablesToFields($condition_string, $fields);
 629
 630                 if ($usermode) {
 631                         $condition_string = $condition_string . ' AND ' . self::condition(true);
 632                 }
 633
 634                 $param_string = DBA::buildParameter($params);
 635                 $param_string = self::addTablesToFields($param_string, $threadfields);
 636                 $param_string = self::addTablesToFields($param_string, $fields);
 637
 638                 $table = "`thread` " . self::constructJoins($uid, $select_fields . $condition_string . $param_string, true, $usermode);
 639
 640                 $sql = "SELECT " . $select_fields . " FROM " . $table . $condition_string . $param_string;
 641
 642                 return DBA::p($sql, $condition);
 643         }
 644
 645         /**
 646          * Returns a list of fields that are associated with the item table
 647          *
 648          * @param $usermode
 649          * @return array field list
 650          */
 651         private static function fieldlist($usermode)
 652         {
 653                 $fields = [];
 654
 655                 $fields['item'] = ['id', 'uid', 'parent', 'uri', 'parent-uri', 'thr-parent',
 656                         'guid', 'uri-id', 'parent-uri-id', 'thr-parent-id', 'vid',
 657                         'contact-id', 'owner-id', 'author-id', 'type', 'wall', 'gravity', 'extid',
 658                         'created', 'edited', 'commented', 'received', 'changed', 'psid',
 659                         'resource-id', 'event-id', 'attach', 'post-type', 'file',
 660                         'private', 'pubmail', 'moderated', 'visible', 'starred', 'bookmark',
 661                         'unseen', 'deleted', 'origin', 'forum_mode', 'mention', 'global',
 662                         'id' => 'item_id', 'network', 'icid',
 663                         'uri-id' => 'internal-uri-id', 'uid' => 'internal-uid',
 664                         'network' => 'internal-network', 'psid' => 'internal-psid'];
 665
 666                 if ($usermode) {
 667                         $fields['user-item'] = ['pinned', 'notification-type', 'ignored' => 'internal-user-ignored'];
 668                 }
 669
 670                 $fields['item-content'] = array_merge(self::CONTENT_FIELDLIST, self::MIXED_CONTENT_FIELDLIST);
 671
 672                 $fields['post-delivery-data'] = array_merge(Post\DeliveryData::LEGACY_FIELD_LIST, Post\DeliveryData::FIELD_LIST);
 673
 674                 $fields['verb'] = ['name' => 'internal-verb'];
 675
 676                 $fields['permissionset'] = ['allow_cid', 'allow_gid', 'deny_cid', 'deny_gid'];
 677
 678                 $fields['author'] = ['url' => 'author-link', 'name' => 'author-name', 'addr' => 'author-addr',
 679                         'thumb' => 'author-avatar', 'nick' => 'author-nick', 'network' => 'author-network'];
 680
 681                 $fields['owner'] = ['url' => 'owner-link', 'name' => 'owner-name', 'addr' => 'owner-addr',
 682                         'thumb' => 'owner-avatar', 'nick' => 'owner-nick', 'network' => 'owner-network'];
 683
 684                 $fields['contact'] = ['url' => 'contact-link', 'name' => 'contact-name', 'thumb' => 'contact-avatar',
 685                         'writable', 'self', 'id' => 'cid', 'alias', 'uid' => 'contact-uid',
 686                         'photo', 'name-date', 'uri-date', 'avatar-date', 'thumb', 'dfrn-id'];
 687
 688                 $fields['parent-item'] = ['guid' => 'parent-guid', 'network' => 'parent-network'];
 689
 690                 $fields['parent-item-author'] = ['url' => 'parent-author-link', 'name' => 'parent-author-name',
 691                         'network' => 'parent-author-network'];
 692
 693                 $fields['event'] = ['created' => 'event-created', 'edited' => 'event-edited',
 694                         'start' => 'event-start','finish' => 'event-finish',
 695                         'summary' => 'event-summary','desc' => 'event-desc',
 696                         'location' => 'event-location', 'type' => 'event-type',
 697                         'nofinish' => 'event-nofinish','adjust' => 'event-adjust',
 698                         'ignore' => 'event-ignore', 'id' => 'event-id'];
 699
 700                 $fields['diaspora-interaction'] = ['interaction', 'interaction' => 'signed_text'];
 701
 702                 return $fields;
 703         }
 704
 705         /**
 706          * Returns SQL condition for the "select" functions
 707          *
 708          * @param boolean $thread_mode Called for the items (false) or for the threads (true)
 709          *
 710          * @return string SQL condition
 711          */
 712         private static function condition($thread_mode)
 713         {
 714                 if ($thread_mode) {
 715                         $master_table = "`thread`";
 716                 } else {
 717                         $master_table = "`item`";
 718                 }
 719                 return sprintf("$master_table.`visible` AND NOT $master_table.`deleted` AND NOT $master_table.`moderated`
 720                         AND (`user-item`.`hidden` IS NULL OR NOT `user-item`.`hidden`)
 721                         AND (`user-author`.`blocked` IS NULL OR NOT `user-author`.`blocked`)
 722                         AND (`user-author`.`ignored` IS NULL OR NOT `user-author`.`ignored` OR `item`.`gravity` != %d)
 723                         AND (`user-owner`.`blocked` IS NULL OR NOT `user-owner`.`blocked`)
 724                         AND (`user-owner`.`ignored` IS NULL OR NOT `user-owner`.`ignored` OR `item`.`gravity` != %d) ",
 725                         GRAVITY_PARENT, GRAVITY_PARENT);
 726         }
 727
 728         /**
 729          * Returns all needed "JOIN" commands for the "select" functions
 730          *
 731          * @param integer $uid          User ID
 732          * @param string  $sql_commands The parts of the built SQL commands in the "select" functions
 733          * @param boolean $thread_mode  Called for the items (false) or for the threads (true)
 734          *
 735          * @param         $user_mode
 736          * @return string The SQL joins for the "select" functions
 737          */
 738         private static function constructJoins($uid, $sql_commands, $thread_mode, $user_mode)
 739         {
 740                 if ($thread_mode) {
 741                         $master_table = "`thread`";
 742                         $master_table_key = "`thread`.`iid`";
 743                         $joins = "STRAIGHT_JOIN `item` ON `item`.`id` = `thread`.`iid` ";
 744                 } else {
 745                         $master_table = "`item`";
 746                         $master_table_key = "`item`.`id`";
 747                         $joins = '';
 748                 }
 749
 750                 if ($user_mode) {
 751                         $joins .= sprintf("STRAIGHT_JOIN `contact` ON `contact`.`id` = $master_table.`contact-id`
 752                                 AND NOT `contact`.`blocked`
 753                                 AND ((NOT `contact`.`readonly` AND NOT `contact`.`pending` AND (`contact`.`rel` IN (%s, %s)))
 754                                 OR `contact`.`self` OR `item`.`gravity` != %d OR `contact`.`uid` = 0)
 755                                 STRAIGHT_JOIN `contact` AS `author` ON `author`.`id` = $master_table.`author-id` AND NOT `author`.`blocked`
 756                                 STRAIGHT_JOIN `contact` AS `owner` ON `owner`.`id` = $master_table.`owner-id` AND NOT `owner`.`blocked`
 757                                 LEFT JOIN `user-item` ON `user-item`.`iid` = $master_table_key AND `user-item`.`uid` = %d
 758                                 LEFT JOIN `user-contact` AS `user-author` ON `user-author`.`cid` = $master_table.`author-id` AND `user-author`.`uid` = %d
 759                                 LEFT JOIN `user-contact` AS `user-owner` ON `user-owner`.`cid` = $master_table.`owner-id` AND `user-owner`.`uid` = %d",
 760                                 Contact::SHARING, Contact::FRIEND, GRAVITY_PARENT, intval($uid), intval($uid), intval($uid));
 761                 } else {
 762                         if (strpos($sql_commands, "`contact`.") !== false) {
 763                                 $joins .= "LEFT JOIN `contact` ON `contact`.`id` = $master_table.`contact-id`";
 764                         }
 765                         if (strpos($sql_commands, "`author`.") !== false) {
 766                                 $joins .= " LEFT JOIN `contact` AS `author` ON `author`.`id` = $master_table.`author-id`";
 767                         }
 768                         if (strpos($sql_commands, "`owner`.") !== false) {
 769                                 $joins .= " LEFT JOIN `contact` AS `owner` ON `owner`.`id` = $master_table.`owner-id`";
 770                         }
 771                 }
 772
 773                 if (strpos($sql_commands, "`group_member`.") !== false) {
 774                         $joins .= " STRAIGHT_JOIN `group_member` ON `group_member`.`contact-id` = $master_table.`contact-id`";
 775                 }
 776
 777                 if (strpos($sql_commands, "`user`.") !== false) {
 778                         $joins .= " STRAIGHT_JOIN `user` ON `user`.`uid` = $master_table.`uid`";
 779                 }
 780
 781                 if (strpos($sql_commands, "`event`.") !== false) {
 782                         $joins .= " LEFT JOIN `event` ON `event-id` = `event`.`id`";
 783                 }
 784
 785                 if (strpos($sql_commands, "`diaspora-interaction`.") !== false) {
 786                         $joins .= " LEFT JOIN `diaspora-interaction` ON `diaspora-interaction`.`uri-id` = `item`.`uri-id`";
 787                 }
 788
 789                 if (strpos($sql_commands, "`item-content`.") !== false) {
 790                         $joins .= " LEFT JOIN `item-content` ON `item-content`.`uri-id` = `item`.`uri-id`";
 791                 }
 792
 793                 if (strpos($sql_commands, "`post-delivery-data`.") !== false) {
 794                         $joins .= " LEFT JOIN `post-delivery-data` ON `post-delivery-data`.`uri-id` = `item`.`uri-id` AND `item`.`origin`";
 795                 }
 796
 797                 if (strpos($sql_commands, "`verb`.") !== false) {
 798                         $joins .= " LEFT JOIN `verb` ON `verb`.`id` = `item`.`vid`";
 799                 }
 800
 801                 if (strpos($sql_commands, "`permissionset`.") !== false) {
 802                         $joins .= " LEFT JOIN `permissionset` ON `permissionset`.`id` = `item`.`psid`";
 803                 }
 804
 805                 if ((strpos($sql_commands, "`parent-item`.") !== false) || (strpos($sql_commands, "`parent-item-author`.") !== false)) {
 806                         $joins .= " STRAIGHT_JOIN `item` AS `parent-item` ON `parent-item`.`id` = `item`.`parent`";
 807
 808                         if (strpos($sql_commands, "`parent-item-author`.") !== false) {
 809                                 $joins .= " STRAIGHT_JOIN `contact` AS `parent-item-author` ON `parent-item-author`.`id` = `parent-item`.`author-id`";
 810                         }
 811                 }
 812
 813                 return $joins;
 814         }
 815
 816         /**
 817          * Add the field list for the "select" functions
 818          *
 819          * @param array $fields The field definition array
 820          * @param array $selected The array with the selected fields from the "select" functions
 821          *
 822          * @return string The field list
 823          */
 824         private static function constructSelectFields(array $fields, array $selected)
 825         {
 826                 if (!empty($selected)) {
 827                         $selected = array_merge($selected, ['internal-uri-id', 'internal-uid', 'internal-psid', 'internal-network']);
 828                 }
 829
 830                 if (in_array('verb', $selected)) {
 831                         $selected = array_merge($selected, ['internal-verb']);
 832                 }
 833
 834                 if (in_array('ignored', $selected)) {
 835                         $selected[] = 'internal-user-ignored';
 836                 }
 837
 838                 $legacy_fields = array_merge(Post\DeliveryData::LEGACY_FIELD_LIST, self::MIXED_CONTENT_FIELDLIST);
 839
 840                 $selection = [];
 841                 foreach ($fields as $table => $table_fields) {
 842                         foreach ($table_fields as $field => $select) {
 843                                 if (empty($selected) || in_array($select, $selected)) {
 844                                         if (self::isLegacyMode() && in_array($select, $legacy_fields)) {
 845                                                 $selection[] = "`item`.`".$select."` AS `internal-item-" . $select . "`";
 846                                         }
 847                                         if (is_int($field)) {
 848                                                 $selection[] = "`" . $table . "`.`" . $select . "`";
 849                                         } else {
 850                                                 $selection[] = "`" . $table . "`.`" . $field . "` AS `" . $select . "`";
 851                                         }
 852                                 }
 853                         }
 854                 }
 855                 return implode(", ", $selection);
 856         }
 857
 858         /**
 859          * add table definition to fields in an SQL query
 860          *
 861          * @param string $query SQL query
 862          * @param array $fields The field definition array
 863          *
 864          * @return string the changed SQL query
 865          */
 866         private static function addTablesToFields($query, $fields)
 867         {
 868                 foreach ($fields as $table => $table_fields) {
 869                         foreach ($table_fields as $alias => $field) {
 870                                 if (is_int($alias)) {
 871                                         $replace_field = $field;
 872                                 } else {
 873                                         $replace_field = $alias;
 874                                 }
 875
 876                                 $search = "/([^\.])`" . $field . "`/i";
 877                                 $replace = "$1`" . $table . "`.`" . $replace_field . "`";
 878                                 $query = preg_replace($search, $replace, $query);
 879                         }
 880                 }
 881                 return $query;
 882         }
 883
 884         /**
 885          * Update existing item entries
 886          *
 887          * @param array $fields    The fields that are to be changed
 888          * @param array $condition The condition for finding the item entries
 889          *
 890          * In the future we may have to change permissions as well.
 891          * Then we had to add the user id as third parameter.
 892          *
 893          * A return value of "0" doesn't mean an error - but that 0 rows had been changed.
 894          *
 895          * @return integer|boolean number of affected rows - or "false" if there was an error
 896          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 897          */
 898         public static function update(array $fields, array $condition)
 899         {
 900                 if (empty($condition) || empty($fields)) {
 901                         return false;
 902                 }
 903
 904                 // To ensure the data integrity we do it in an transaction
 905                 DBA::transaction();
 906
 907                 // We cannot simply expand the condition to check for origin entries
 908                 // The condition needn't to be a simple array but could be a complex condition.
 909                 // And we have to execute this query before the update to ensure to fetch the same data.
 910                 $items = DBA::select('item', ['id', 'origin', 'uri', 'uri-id', 'icid', 'uid', 'file'], $condition);
 911
 912                 $content_fields = [];
 913                 foreach (array_merge(self::CONTENT_FIELDLIST, self::MIXED_CONTENT_FIELDLIST) as $field) {
 914                         if (isset($fields[$field])) {
 915                                 $content_fields[$field] = $fields[$field];
 916                                 if (in_array($field, self::CONTENT_FIELDLIST) || !self::isLegacyMode()) {
 917                                         unset($fields[$field]);
 918                                 } else {
 919                                         $fields[$field] = null;
 920                                 }
 921                         }
 922                 }
 923
 924                 $delivery_data = Post\DeliveryData::extractFields($fields);
 925
 926                 $clear_fields = ['bookmark', 'type', 'author-name', 'author-avatar', 'author-link', 'owner-name', 'owner-avatar', 'owner-link', 'postopts', 'inform'];
 927                 foreach ($clear_fields as $field) {
 928                         if (array_key_exists($field, $fields)) {
 929                                 $fields[$field] = null;
 930                         }
 931                 }
 932
 933                 if (array_key_exists('file', $fields)) {
 934                         $files = $fields['file'];
 935                         $fields['file'] = null;
 936                 } else {
 937                         $files = null;
 938                 }
 939
 940                 if (!empty($content_fields['verb'])) {
 941                         $fields['vid'] = Verb::getID($content_fields['verb']);
 942                 }
 943
 944                 if (!empty($fields)) {
 945                         $success = DBA::update('item', $fields, $condition);
 946
 947                         if (!$success) {
 948                                 DBA::close($items);
 949                                 DBA::rollback();
 950                                 return false;
 951                         }
 952                 }
 953
 954                 // When there is no content for the "old" item table, this will count the fetched items
 955                 $rows = DBA::affectedRows();
 956
 957                 $notify_items = [];
 958
 959                 while ($item = DBA::fetch($items)) {
 960                         if (empty($content_fields['verb']) || !in_array($content_fields['verb'], self::ACTIVITIES)) {
 961                                 self::updateContent($content_fields, ['uri-id' => $item['uri-id']]);
 962
 963                                 if (empty($item['icid'])) {
 964                                         $item_content = DBA::selectFirst('item-content', [], ['uri-id' => $item['uri-id']]);
 965                                         if (DBA::isResult($item_content)) {
 966                                                 $item_fields = ['icid' => $item_content['id']];
 967                                                 // Clear all fields in the item table that have a content in the item-content table
 968                                                 if (self::isLegacyMode()) {
 969                                                         foreach ($item_content as $field => $content) {
 970                                                                 if (in_array($field, self::MIXED_CONTENT_FIELDLIST) && !empty($content)) {
 971                                                                         $item_fields[$field] = null;
 972                                                                 }
 973                                                         }
 974                                                 }
 975                                                 DBA::update('item', $item_fields, ['id' => $item['id']]);
 976                                         }
 977                                 }
 978                         }
 979
 980                         if (!is_null($files)) {
 981                                 Category::storeTextByURIId($item['uri-id'], $item['uid'], $files);
 982                                 if (!empty($item['file'])) {
 983                                         DBA::update('item', ['file' => ''], ['id' => $item['id']]);
 984                                 }
 985                         }
 986
 987                         Post\DeliveryData::update($item['uri-id'], $delivery_data);
 988
 989                         self::updateThread($item['id']);
 990
 991                         // We only need to notfiy others when it is an original entry from us.
 992                         // Only call the notifier when the item has some content relevant change.
 993                         if ($item['origin'] && in_array('edited', array_keys($fields))) {
 994                                 $notify_items[] = $item['id'];
 995                         }
 996                 }
 997
 998                 DBA::close($items);
 999                 DBA::commit();
1000
1001                 foreach ($notify_items as $notify_item) {
1002                         Worker::add(PRIORITY_HIGH, "Notifier", Delivery::POST, $notify_item);
1003                 }
1004
1005                 return $rows;
1006         }
1007
1008         /**
1009          * Delete an item and notify others about it - if it was ours
1010          *
1011          * @param array   $condition The condition for finding the item entries
1012          * @param integer $priority  Priority for the notification
1013          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1014          */
1015         public static function markForDeletion($condition, $priority = PRIORITY_HIGH)
1016         {
1017                 $items = self::select(['id'], $condition);
1018                 while ($item = self::fetch($items)) {
1019                         self::markForDeletionById($item['id'], $priority);
1020                 }
1021                 DBA::close($items);
1022         }
1023
1024         /**
1025          * Delete an item for an user and notify others about it - if it was ours
1026          *
1027          * @param array   $condition The condition for finding the item entries
1028          * @param integer $uid       User who wants to delete this item
1029          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1030          */
1031         public static function deleteForUser($condition, $uid)
1032         {
1033                 if ($uid == 0) {
1034                         return;
1035                 }
1036
1037                 $items = self::select(['id', 'uid'], $condition);
1038                 while ($item = self::fetch($items)) {
1039                         // "Deleting" global items just means hiding them
1040                         if ($item['uid'] == 0) {
1041                                 DBA::update('user-item', ['hidden' => true], ['iid' => $item['id'], 'uid' => $uid], true);
1042
1043                                 // Delete notifications
1044                                 DBA::delete('notify', ['iid' => $item['id'], 'uid' => $uid]);
1045                         } elseif ($item['uid'] == $uid) {
1046                                 self::markForDeletionById($item['id'], PRIORITY_HIGH);
1047                         } else {
1048                                 Logger::log('Wrong ownership. Not deleting item ' . $item['id']);
1049                         }
1050                 }
1051                 DBA::close($items);
1052         }
1053
1054         /**
1055          * Mark an item for deletion, delete related data and notify others about it - if it was ours
1056          *
1057          * @param integer $item_id
1058          * @param integer $priority Priority for the notification
1059          *
1060          * @return boolean success
1061          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1062          */
1063         public static function markForDeletionById($item_id, $priority = PRIORITY_HIGH)
1064         {
1065                 Logger::info('Mark item for deletion by id', ['id' => $item_id, 'callstack' => System::callstack()]);
1066                 // locate item to be deleted
1067                 $fields = ['id', 'uri', 'uri-id', 'uid', 'parent', 'parent-uri', 'origin',
1068                         'deleted', 'file', 'resource-id', 'event-id', 'attach',
1069                         'verb', 'object-type', 'object', 'target', 'contact-id',
1070                         'icid', 'psid', 'gravity'];
1071                 $item = self::selectFirst($fields, ['id' => $item_id]);
1072                 if (!DBA::isResult($item)) {
1073                         Logger::info('Item not found.', ['id' => $item_id]);
1074                         return false;
1075                 }
1076
1077                 if ($item['deleted']) {
1078                         Logger::info('Item has already been marked for deletion.', ['id' => $item_id]);
1079                         return false;
1080                 }
1081
1082                 $parent = self::selectFirst(['origin'], ['id' => $item['parent']]);
1083                 if (!DBA::isResult($parent)) {
1084                         $parent = ['origin' => false];
1085                 }
1086
1087                 // clean up categories and tags so they don't end up as orphans
1088
1089                 $matches = [];
1090                 $cnt = preg_match_all('/<(.*?)>/', $item['file'], $matches, PREG_SET_ORDER);
1091
1092                 if ($cnt) {
1093                         foreach ($matches as $mtch) {
1094                                 FileTag::unsaveFile($item['uid'], $item['id'], $mtch[1],true);
1095                         }
1096                 }
1097
1098                 $matches = [];
1099
1100                 $cnt = preg_match_all('/\[(.*?)\]/', $item['file'], $matches, PREG_SET_ORDER);
1101
1102                 if ($cnt) {
1103                         foreach ($matches as $mtch) {
1104                                 FileTag::unsaveFile($item['uid'], $item['id'], $mtch[1],false);
1105                         }
1106                 }
1107
1108                 /*
1109                  * If item is a link to a photo resource, nuke all the associated photos
1110                  * (visitors will not have photo resources)
1111                  * This only applies to photos uploaded from the photos page. Photos inserted into a post do not
1112                  * generate a resource-id and therefore aren't intimately linked to the item.
1113                  */
1114                 /// @TODO: this should first check if photo is used elsewhere
1115                 if (strlen($item['resource-id'])) {
1116                         Photo::delete(['resource-id' => $item['resource-id'], 'uid' => $item['uid']]);
1117                 }
1118
1119                 // If item is a link to an event, delete the event.
1120                 if (intval($item['event-id'])) {
1121                         Event::delete($item['event-id']);
1122                 }
1123
1124                 // If item has attachments, drop them
1125                 /// @TODO: this should first check if attachment is used elsewhere
1126                 foreach (explode(",", $item['attach']) as $attach) {
1127                         preg_match("|attach/(\d+)|", $attach, $matches);
1128                         if (is_array($matches) && count($matches) > 1) {
1129                                 Attach::delete(['id' => $matches[1], 'uid' => $item['uid']]);
1130                         }
1131                 }
1132
1133                 // Delete notifications
1134                 DBA::delete('notify', ['iid' => $item['id'], 'uid' => $item['uid']]);
1135
1136                 // Set the item to "deleted"
1137                 $item_fields = ['deleted' => true, 'edited' => DateTimeFormat::utcNow(), 'changed' => DateTimeFormat::utcNow()];
1138                 DBA::update('item', $item_fields, ['id' => $item['id']]);
1139
1140                 Category::storeTextByURIId($item['uri-id'], $item['uid'], '');
1141                 self::deleteThread($item['id'], $item['parent-uri']);
1142
1143                 if (!self::exists(["`uri` = ? AND `uid` != 0 AND NOT `deleted`", $item['uri']])) {
1144                         self::markForDeletion(['uri' => $item['uri'], 'uid' => 0, 'deleted' => false], $priority);
1145                 }
1146
1147                 Post\DeliveryData::delete($item['uri-id']);
1148
1149                 if (!empty($item['icid']) && !self::exists(['icid' => $item['icid'], 'deleted' => false])) {
1150                         DBA::delete('item-content', ['id' => $item['icid']], ['cascade' => false]);
1151                 }
1152                 // When the permission set will be used in photo and events as well,
1153                 // this query here needs to be extended.
1154                 // @todo Currently deactivated. We need the permission set in the deletion process.
1155                 // This is a reminder to add the removal somewhere else.
1156                 //if (!empty($item['psid']) && !self::exists(['psid' => $item['psid'], 'deleted' => false])) {
1157                 //      DBA::delete('permissionset', ['id' => $item['psid']], ['cascade' => false]);
1158                 //}
1159
1160                 // If it's the parent of a comment thread, kill all the kids
1161                 if ($item['gravity'] == GRAVITY_PARENT) {
1162                         self::markForDeletion(['parent' => $item['parent'], 'deleted' => false], $priority);
1163                 }
1164
1165                 // Is it our comment and/or our thread?
1166                 if ($item['origin'] || $parent['origin']) {
1167                         // When we delete the original post we will delete all existing copies on the server as well
1168                         self::markForDeletion(['uri' => $item['uri'], 'deleted' => false], $priority);
1169
1170                         // send the notification upstream/downstream
1171                         Worker::add(['priority' => $priority, 'dont_fork' => true], "Notifier", Delivery::DELETION, intval($item['id']));
1172                 } elseif ($item['uid'] != 0) {
1173
1174                         // When we delete just our local user copy of an item, we have to set a marker to hide it
1175                         $global_item = self::selectFirst(['id'], ['uri' => $item['uri'], 'uid' => 0, 'deleted' => false]);
1176                         if (DBA::isResult($global_item)) {
1177                                 DBA::update('user-item', ['hidden' => true], ['iid' => $global_item['id'], 'uid' => $item['uid']], true);
1178                         }
1179                 }
1180
1181                 Logger::info('Item has been marked for deletion.', ['id' => $item_id]);
1182
1183                 return true;
1184         }
1185
1186
1187         private static function guid($item, $notify)
1188         {
1189                 if (!empty($item['guid'])) {
1190                         return Strings::escapeTags(trim($item['guid']));
1191                 }
1192
1193                 if ($notify) {
1194                         // We have to avoid duplicates. So we create the GUID in form of a hash of the plink or uri.
1195                         // We add the hash of our own host because our host is the original creator of the post.
1196                         $prefix_host = DI::baseUrl()->getHostname();
1197                 } else {
1198                         $prefix_host = '';
1199
1200                         // We are only storing the post so we create a GUID from the original hostname.
1201                         if (!empty($item['author-link'])) {
1202                                 $parsed = parse_url($item['author-link']);
1203                                 if (!empty($parsed['host'])) {
1204                                         $prefix_host = $parsed['host'];
1205                                 }
1206                         }
1207
1208                         if (empty($prefix_host) && !empty($item['plink'])) {
1209                                 $parsed = parse_url($item['plink']);
1210                                 if (!empty($parsed['host'])) {
1211                                         $prefix_host = $parsed['host'];
1212                                 }
1213                         }
1214
1215                         if (empty($prefix_host) && !empty($item['uri'])) {
1216                                 $parsed = parse_url($item['uri']);
1217                                 if (!empty($parsed['host'])) {
1218                                         $prefix_host = $parsed['host'];
1219                                 }
1220                         }
1221
1222                         // Is it in the format data@host.tld? - Used for mail contacts
1223                         if (empty($prefix_host) && !empty($item['author-link']) && strstr($item['author-link'], '@')) {
1224                                 $mailparts = explode('@', $item['author-link']);
1225                                 $prefix_host = array_pop($mailparts);
1226                         }
1227                 }
1228
1229                 if (!empty($item['plink'])) {
1230                         $guid = self::guidFromUri($item['plink'], $prefix_host);
1231                 } elseif (!empty($item['uri'])) {
1232                         $guid = self::guidFromUri($item['uri'], $prefix_host);
1233                 } else {
1234                         $guid = System::createUUID(hash('crc32', $prefix_host));
1235                 }
1236
1237                 return $guid;
1238         }
1239
1240         private static function contactId($item)
1241         {
1242                 if (!empty($item['contact-id']) && DBA::exists('contact', ['self' => true, 'id' => $item['contact-id']])) {
1243                         return $item['contact-id'];
1244                 } elseif (($item['gravity'] == GRAVITY_PARENT) && !empty($item['uid']) && !empty($item['contact-id']) && Contact::isSharing($item['contact-id'], $item['uid'])) {
1245                         return $item['contact-id'];
1246                 } elseif (!empty($item['uid']) && !Contact::isSharing($item['author-id'], $item['uid'])) {
1247                         return $item['author-id'];
1248                 } elseif (!empty($item['contact-id'])) {
1249                         return $item['contact-id'];
1250                 } else {
1251                         $contact_id = Contact::getIdForURL($item['author-link'], $item['uid']);
1252                         if (!empty($contact_id)) {
1253                                 return $contact_id;
1254                         }
1255                 }
1256                 return $item['author-id'];
1257         }
1258
1259         // This function will finally cover most of the preparation functionality in mod/item.php
1260         public static function prepare(&$item)
1261         {
1262                 /*
1263                  * @TODO: Unused code triggering inspection errors
1264                  *
1265                 $data = BBCode::getAttachmentData($item['body']);
1266                 if ((preg_match_all("/\[bookmark\=([^\]]*)\](.*?)\[\/bookmark\]/ism", $item['body'], $match, PREG_SET_ORDER) || isset($data["type"]))
1267                         && ($posttype != Item::PT_PERSONAL_NOTE)) {
1268                         $posttype = Item::PT_PAGE;
1269                         $objecttype = ACTIVITY_OBJ_BOOKMARK;
1270                 }
1271                  */
1272         }
1273
1274         /**
1275          * Write an item array into a spool file to be inserted later.
1276          * This command is called whenever there are issues storing an item.
1277          *
1278          * @param array $item The item fields that are to be inserted
1279          * @throws \Exception
1280          */
1281         private static function spool($orig_item)
1282         {
1283                 // Now we store the data in the spool directory
1284                 // We use "microtime" to keep the arrival order and "mt_rand" to avoid duplicates
1285                 $file = 'item-' . round(microtime(true) * 10000) . '-' . mt_rand() . '.msg';
1286
1287                 $spoolpath = get_spoolpath();
1288                 if ($spoolpath != "") {
1289                         $spool = $spoolpath . '/' . $file;
1290
1291                         file_put_contents($spool, json_encode($orig_item));
1292                         Logger::warning("Item wasn't stored - Item was spooled into file", ['file' => $file]);
1293                 }
1294         }
1295
1296         /**
1297          * Check if the item array is a duplicate
1298          *
1299          * @param array $item
1300          * @return boolean is it a duplicate?
1301          */
1302         private static function isDuplicate(array $item)
1303         {
1304                 // Checking if there is already an item with the same guid
1305                 $condition = ['guid' => $item['guid'], 'network' => $item['network'], 'uid' => $item['uid']];
1306                 if (self::exists($condition)) {
1307                         Logger::notice('Found already existing item', [
1308                                 'guid' => $item['guid'],
1309                                 'uid' => $item['uid'],
1310                                 'network' => $item['network']
1311                         ]);
1312                         return true;
1313                 }
1314
1315                 $condition = ["`uri` = ? AND `network` IN (?, ?) AND `uid` = ?",
1316                         $item['uri'], $item['network'], Protocol::DFRN, $item['uid']];
1317                 if (self::exists($condition)) {
1318                         Logger::notice('duplicated item with the same uri found.', $item);
1319                         return true;
1320                 }
1321
1322                 // On Friendica and Diaspora the GUID is unique
1323                 if (in_array($item['network'], [Protocol::DFRN, Protocol::DIASPORA])) {
1324                         $condition = ['guid' => $item['guid'], 'uid' => $item['uid']];
1325                         if (self::exists($condition)) {
1326                                 Logger::notice('duplicated item with the same guid found.', $item);
1327                                 return true;
1328                         }
1329                 } elseif ($item['network'] == Protocol::OSTATUS) {
1330                         // Check for an existing post with the same content. There seems to be a problem with OStatus.
1331                         $condition = ["`body` = ? AND `network` = ? AND `created` = ? AND `contact-id` = ? AND `uid` = ?",
1332                                         $item['body'], $item['network'], $item['created'], $item['contact-id'], $item['uid']];
1333                         if (self::exists($condition)) {
1334                                 Logger::notice('duplicated item with the same body found.', $item);
1335                                 return true;
1336                         }
1337                 }
1338
1339                 /*
1340                  * Check for already added items.
1341                  * There is a timing issue here that sometimes creates double postings.
1342                  * An unique index would help - but the limitations of MySQL (maximum size of index values) prevent this.
1343                  */
1344                 if (($item['uid'] == 0) && self::exists(['uri' => trim($item['uri']), 'uid' => 0])) {
1345                         Logger::notice('Global item already stored.', ['uri' => $item['uri'], 'network' => $item['network']]);
1346                         return true;
1347                 }
1348
1349                 return false;
1350         }
1351
1352         /**
1353          * Check if the item array is valid
1354          *
1355          * @param array $item
1356          * @return boolean item is valid
1357          */
1358         private static function isValid(array $item)
1359         {
1360                 // When there is no content then we don't post it
1361                 if ($item['body'].$item['title'] == '') {
1362                         Logger::notice('No body, no title.');
1363                         return false;
1364                 }
1365
1366                 // check for create date and expire time
1367                 $expire_interval = DI::config()->get('system', 'dbclean-expire-days', 0);
1368
1369                 $user = DBA::selectFirst('user', ['expire'], ['uid' => $item['uid']]);
1370                 if (DBA::isResult($user) && ($user['expire'] > 0) && (($user['expire'] < $expire_interval) || ($expire_interval == 0))) {
1371                         $expire_interval = $user['expire'];
1372                 }
1373
1374                 if (($expire_interval > 0) && !empty($item['created'])) {
1375                         $expire_date = time() - ($expire_interval * 86400);
1376                         $created_date = strtotime($item['created']);
1377                         if ($created_date < $expire_date) {
1378                                 Logger::notice('Item created before expiration interval.', [
1379                                         'created' => date('c', $created_date),
1380                                         'expired' => date('c', $expire_date),
1381                                         '$item' => $item
1382                                 ]);
1383                                 return false;
1384                         }
1385                 }
1386
1387                 if (Contact::isBlocked($item['author-id'])) {
1388                         Logger::notice('Author is blocked node-wide', ['author-link' => $item['author-link'], 'item-uri' => $item['uri']]);
1389                         return false;
1390                 }
1391
1392                 if (!empty($item['author-link']) && Network::isUrlBlocked($item['author-link'])) {
1393                         Logger::notice('Author server is blocked', ['author-link' => $item['author-link'], 'item-uri' => $item['uri']]);
1394                         return false;
1395                 }
1396
1397                 if (!empty($item['uid']) && Contact::isBlockedByUser($item['author-id'], $item['uid'])) {
1398                         Logger::notice('Author is blocked by user', ['author-link' => $item['author-link'], 'uid' => $item['uid'], 'item-uri' => $item['uri']]);
1399                         return false;
1400                 }
1401
1402                 if (Contact::isBlocked($item['owner-id'])) {
1403                         Logger::notice('Owner is blocked node-wide', ['owner-link' => $item['owner-link'], 'item-uri' => $item['uri']]);
1404                         return false;
1405                 }
1406
1407                 if (!empty($item['owner-link']) && Network::isUrlBlocked($item['owner-link'])) {
1408                         Logger::notice('Owner server is blocked', ['owner-link' => $item['owner-link'], 'item-uri' => $item['uri']]);
1409                         return false;
1410                 }
1411
1412                 if (!empty($item['uid']) && Contact::isBlockedByUser($item['owner-id'], $item['uid'])) {
1413                         Logger::notice('Owner is blocked by user', ['owner-link' => $item['owner-link'], 'uid' => $item['uid'], 'item-uri' => $item['uri']]);
1414                         return false;
1415                 }
1416
1417                 // The causer is set during a thread completion, for example because of a reshare. It countains the responsible actor.
1418                 if (!empty($item['uid']) && !empty($item['causer-id']) && Contact::isBlockedByUser($item['causer-id'], $item['uid'])) {
1419                         Logger::notice('Causer is blocked by user', ['causer-link' => $item['causer-link'], 'uid' => $item['uid'], 'item-uri' => $item['uri']]);
1420                         return false;
1421                 }
1422
1423                 if (!empty($item['uid']) && !empty($item['causer-id']) && ($item['parent-uri'] == $item['uri']) && Contact::isIgnoredByUser($item['causer-id'], $item['uid'])) {
1424                         Logger::notice('Causer is ignored by user', ['causer-link' => $item['causer-link'], 'uid' => $item['uid'], 'item-uri' => $item['uri']]);
1425                         return false;
1426                 }
1427
1428                 if ($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 parent data for the given item array
1480          *
1481          * @param array $item
1482          * @return array item array with parent data
1483          */
1484         private static function getParentData(array $item)
1485         {
1486                 // find the parent and snarf the item id and ACLs
1487                 // and anything else we need to inherit
1488
1489                 $fields = ['uri', 'parent-uri', 'id', 'deleted',
1490                         'allow_cid', 'allow_gid', 'deny_cid', 'deny_gid',
1491                         'wall', 'private', 'forum_mode', 'origin', 'author-id'];
1492                 $condition = ['uri' => $item['parent-uri'], 'uid' => $item['uid']];
1493                 $params = ['order' => ['id' => false]];
1494                 $parent = self::selectFirst($fields, $condition, $params);
1495
1496                 if (!DBA::isResult($parent)) {
1497                         Logger::info('item parent was not found - ignoring item', ['parent-uri' => $item['parent-uri'], 'uid' => $item['uid']]);
1498                         return [];
1499                 } else {
1500                         // is the new message multi-level threaded?
1501                         // even though we don't support it now, preserve the info
1502                         // and re-attach to the conversation parent.
1503                         if ($parent['uri'] != $parent['parent-uri']) {
1504                                 $item['parent-uri'] = $parent['parent-uri'];
1505
1506                                 $condition = ['uri' => $item['parent-uri'],
1507                                         'parent-uri' => $item['parent-uri'],
1508                                         'uid' => $item['uid']];
1509                                 $params = ['order' => ['id' => false]];
1510                                 $toplevel_parent = self::selectFirst($fields, $condition, $params);
1511
1512                                 if (DBA::isResult($toplevel_parent)) {
1513                                         $parent = $toplevel_parent;
1514                                 }
1515                         }
1516
1517                         $item['parent']        = $parent['id'];
1518                         $item["deleted"]       = $parent['deleted'];
1519                         $item["allow_cid"]     = $parent['allow_cid'];
1520                         $item['allow_gid']     = $parent['allow_gid'];
1521                         $item['deny_cid']      = $parent['deny_cid'];
1522                         $item['deny_gid']      = $parent['deny_gid'];
1523                         $item['parent_origin'] = $parent['origin'];
1524
1525                         // Don't federate received participation messages
1526                         if ($item['verb'] != Activity::FOLLOW) {
1527                                 $item['wall'] = $parent['wall'];
1528                         } else {
1529                                 $item['wall'] = false;
1530                         }
1531
1532                         /*
1533                          * If the parent is private, force privacy for the entire conversation
1534                          * This differs from the above settings as it subtly allows comments from
1535                          * email correspondents to be private even if the overall thread is not.
1536                          */
1537                         if ($parent['private']) {
1538                                 $item['private'] = $parent['private'];
1539                         }
1540
1541                         /*
1542                          * Edge case. We host a public forum that was originally posted to privately.
1543                          * The original author commented, but as this is a comment, the permissions
1544                          * weren't fixed up so it will still show the comment as private unless we fix it here.
1545                          */
1546                         if ((intval($parent['forum_mode']) == 1) && ($parent['private'] != self::PUBLIC)) {
1547                                 $item['private'] = self::PUBLIC;
1548                         }
1549
1550                         // If its a post that originated here then tag the thread as "mention"
1551                         if ($item['origin'] && $item['uid']) {
1552                                 DBA::update('thread', ['mention' => true], ['iid' => $item['parent']]);
1553                                 Logger::info('tagged thread as mention', ['parent' => $item['parent'], 'uid' => $item['uid']]);
1554                         }
1555
1556                         // Update the contact relations
1557                         if ($item['author-id'] != $parent['author-id']) {
1558                                 DBA::update('contact-relation', ['last-interaction' => $item['created']], ['cid' => $parent['author-id'], 'relation-cid' => $item['author-id']], true);
1559                         }
1560                 }
1561
1562                 return $item;
1563         }
1564
1565         /**
1566          * Get the gravity for the given item array
1567          *
1568          * @param array $item
1569          * @return integer gravity
1570          */
1571         private static function getGravity(array $item)
1572         {
1573                 $activity = DI::activity();
1574
1575                 if (isset($item['gravity'])) {
1576                         return intval($item['gravity']);
1577                 } elseif ($item['parent-uri'] === $item['uri']) {
1578                         return GRAVITY_PARENT;
1579                 } elseif ($activity->match($item['verb'], Activity::POST)) {
1580                         return GRAVITY_COMMENT;
1581                 } elseif ($activity->match($item['verb'], Activity::FOLLOW)) {
1582                         return GRAVITY_ACTIVITY;
1583                 }
1584                 Logger::info('Unknown gravity for verb', ['verb' => $item['verb']]);
1585                 return GRAVITY_UNKNOWN;   // Should not happen
1586         }
1587
1588         public static function insert($item, $notify = false, $dontcache = false)
1589         {
1590                 $structure = self::getItemFields();
1591
1592                 $orig_item = $item;
1593
1594                 $priority = PRIORITY_HIGH;
1595
1596                 // If it is a posting where users should get notifications, then define it as wall posting
1597                 if ($notify) {
1598                         $item['wall'] = 1;
1599                         $item['origin'] = 1;
1600                         $item['network'] = Protocol::DFRN;
1601                         $item['protocol'] = Conversation::PARCEL_DFRN;
1602
1603                         if (is_int($notify)) {
1604                                 $priority = $notify;
1605                         }
1606                 } else {
1607                         $item['network'] = trim(($item['network'] ?? '') ?: Protocol::PHANTOM);
1608                 }
1609
1610                 $uid = intval($item['uid']);
1611
1612                 $item['guid'] = self::guid($item, $notify);
1613                 $item['uri'] = substr(Strings::escapeTags(trim(($item['uri'] ?? '') ?: self::newURI($item['uid'], $item['guid']))), 0, 255);
1614
1615                 // Store URI data
1616                 $item['uri-id'] = ItemURI::insert(['uri' => $item['uri'], 'guid' => $item['guid']]);
1617
1618                 // Store conversation data
1619                 $item = Conversation::insert($item);
1620
1621                 if (!empty($item['thr-parent'])) {
1622                         $item['parent-uri'] = $item['thr-parent'];
1623                 }
1624
1625                 /*
1626                  * Do we already have this item?
1627                  * We have to check several networks since Friendica posts could be repeated
1628                  * via OStatus (maybe Diasporsa as well)
1629                  */
1630                 $duplicate = self::getDuplicateID($item);
1631                 if ($duplicate) {
1632                         return $duplicate;
1633                 }
1634
1635                 // Additional duplicate checks
1636                 /// @todo Check why the first duplication check returns the item number and the second a 0
1637                 if (self::isDuplicate($item)) {
1638                         return 0;
1639                 }
1640
1641                 $item['wall']          = intval($item['wall'] ?? 0);
1642                 $item['extid']         = trim($item['extid'] ?? '');
1643                 $item['author-name']   = trim($item['author-name'] ?? '');
1644                 $item['author-link']   = trim($item['author-link'] ?? '');
1645                 $item['author-avatar'] = trim($item['author-avatar'] ?? '');
1646                 $item['owner-name']    = trim($item['owner-name'] ?? '');
1647                 $item['owner-link']    = trim($item['owner-link'] ?? '');
1648                 $item['owner-avatar']  = trim($item['owner-avatar'] ?? '');
1649                 $item['received']      = (isset($item['received'])  ? DateTimeFormat::utc($item['received'])  : DateTimeFormat::utcNow());
1650                 $item['created']       = (isset($item['created'])   ? DateTimeFormat::utc($item['created'])   : $item['received']);
1651                 $item['edited']        = (isset($item['edited'])    ? DateTimeFormat::utc($item['edited'])    : $item['created']);
1652                 $item['changed']       = (isset($item['changed'])   ? DateTimeFormat::utc($item['changed'])   : $item['created']);
1653                 $item['commented']     = (isset($item['commented']) ? DateTimeFormat::utc($item['commented']) : $item['created']);
1654                 $item['title']         = substr(trim($item['title'] ?? ''), 0, 255);
1655                 $item['location']      = trim($item['location'] ?? '');
1656                 $item['coord']         = trim($item['coord'] ?? '');
1657                 $item['visible']       = (isset($item['visible']) ? intval($item['visible']) : 1);
1658                 $item['deleted']       = 0;
1659                 $item['parent-uri']    = trim(($item['parent-uri'] ?? '') ?: $item['uri']);
1660                 $item['post-type']     = ($item['post-type'] ?? '') ?: self::PT_ARTICLE;
1661                 $item['verb']          = trim($item['verb'] ?? '');
1662                 $item['object-type']   = trim($item['object-type'] ?? '');
1663                 $item['object']        = trim($item['object'] ?? '');
1664                 $item['target-type']   = trim($item['target-type'] ?? '');
1665                 $item['target']        = trim($item['target'] ?? '');
1666                 $item['plink']         = substr(trim($item['plink'] ?? ''), 0, 255);
1667                 $item['allow_cid']     = trim($item['allow_cid'] ?? '');
1668                 $item['allow_gid']     = trim($item['allow_gid'] ?? '');
1669                 $item['deny_cid']      = trim($item['deny_cid'] ?? '');
1670                 $item['deny_gid']      = trim($item['deny_gid'] ?? '');
1671                 $item['private']       = intval($item['private'] ?? self::PUBLIC);
1672                 $item['body']          = trim($item['body'] ?? '');
1673                 $item['attach']        = trim($item['attach'] ?? '');
1674                 $item['app']           = trim($item['app'] ?? '');
1675                 $item['origin']        = intval($item['origin'] ?? 0);
1676                 $item['postopts']      = trim($item['postopts'] ?? '');
1677                 $item['resource-id']   = trim($item['resource-id'] ?? '');
1678                 $item['event-id']      = intval($item['event-id'] ?? 0);
1679                 $item['inform']        = trim($item['inform'] ?? '');
1680                 $item['file']          = trim($item['file'] ?? '');
1681
1682                 // Items cannot be stored before they happen ...
1683                 if ($item['created'] > DateTimeFormat::utcNow()) {
1684                         $item['created'] = DateTimeFormat::utcNow();
1685                 }
1686
1687                 // We haven't invented time travel by now.
1688                 if ($item['edited'] > DateTimeFormat::utcNow()) {
1689                         $item['edited'] = DateTimeFormat::utcNow();
1690                 }
1691
1692                 $item['plink'] = ($item['plink'] ?? '') ?: DI::baseUrl() . '/display/' . urlencode($item['guid']);
1693
1694                 $item['language'] = self::getLanguage($item);
1695
1696                 $item['gravity'] = self::getGravity($item);
1697
1698                 $default = ['url' => $item['author-link'], 'name' => $item['author-name'],
1699                         'photo' => $item['author-avatar'], 'network' => $item['network']];
1700                 $item['author-id'] = ($item['author-id'] ?? 0) ?: Contact::getIdForURL($item['author-link'], 0, null, $default);
1701
1702                 $default = ['url' => $item['owner-link'], 'name' => $item['owner-name'],
1703                         'photo' => $item['owner-avatar'], 'network' => $item['network']];
1704                 $item['owner-id'] = ($item['owner-id'] ?? 0) ?: Contact::getIdForURL($item['owner-link'], 0, null, $default);
1705
1706                 // The contact-id should be set before "self::insert" was called - but there seems to be issues sometimes
1707                 $item["contact-id"] = self::contactId($item);
1708
1709                 if (!self::isValid($item)) {
1710                         return 0;
1711                 }
1712
1713                 // We don't store the causer, we only have it here for the checks in the function above
1714                 unset($item['causer-id']);
1715                 unset($item['causer-link']);
1716
1717                 // We don't store these fields anymore in the item table
1718                 unset($item['author-link']);
1719                 unset($item['author-name']);
1720                 unset($item['author-avatar']);
1721                 unset($item['author-network']);
1722
1723                 unset($item['owner-link']);
1724                 unset($item['owner-name']);
1725                 unset($item['owner-avatar']);
1726
1727                 $item['thr-parent'] = $item['parent-uri'];
1728
1729                 if ($item['parent-uri'] != $item['uri']) {
1730                         $item = self::getParentData($item);
1731                         if (empty($item)) {
1732                                 return 0;
1733                         }
1734
1735                         $parent_id = $item['parent'];
1736                         unset($item['parent']);
1737                         $parent_origin = $item['parent_origin'];
1738                         unset($item['parent_origin']);
1739                 } else {
1740                         $parent_id = 0;
1741                         $parent_origin = $item['origin'];
1742                 }
1743
1744                 $item['parent-uri-id'] = ItemURI::getIdByURI($item['parent-uri']);
1745                 $item['thr-parent-id'] = ItemURI::getIdByURI($item['thr-parent']);
1746
1747                 // Is this item available in the global items (with uid=0)?
1748                 if ($item["uid"] == 0) {
1749                         $item["global"] = true;
1750
1751                         // Set the global flag on all items if this was a global item entry
1752                         DBA::update('item', ['global' => true], ['uri' => $item["uri"]]);
1753                 } else {
1754                         $item["global"] = self::exists(['uid' => 0, 'uri' => $item["uri"]]);
1755                 }
1756
1757                 // ACL settings
1758                 if (!empty($item["allow_cid"] . $item["allow_gid"] . $item["deny_cid"] . $item["deny_gid"])) {
1759                         $item["private"] = self::PRIVATE;
1760                 }
1761
1762                 if ($notify) {
1763                         $item['edit'] = false;
1764                         $item['parent'] = $parent_id;
1765                         Hook::callAll('post_local', $item);
1766                         unset($item['edit']);
1767                         unset($item['parent']);
1768                 } else {
1769                         Hook::callAll('post_remote', $item);
1770                 }
1771
1772                 if (!empty($item['cancel'])) {
1773                         Logger::log('post cancelled by addon.');
1774                         return 0;
1775                 }
1776
1777                 if (empty($item['vid']) && !empty($item['verb'])) {
1778                         $item['vid'] = Verb::getID($item['verb']);
1779                 }
1780
1781                 // Creates or assigns the permission set
1782                 $item['psid'] = PermissionSet::getIdFromACL(
1783                         $item['uid'],
1784                         $item['allow_cid'],
1785                         $item['allow_gid'],
1786                         $item['deny_cid'],
1787                         $item['deny_gid']
1788                 );
1789
1790                 unset($item['allow_cid']);
1791                 unset($item['allow_gid']);
1792                 unset($item['deny_cid']);
1793                 unset($item['deny_gid']);
1794
1795                 // This array field is used to trigger some automatic reactions
1796                 // It is mainly used in the "post_local" hook.
1797                 unset($item['api_source']);
1798
1799
1800                 // Check for hashtags in the body and repair or add hashtag links
1801                 $item['body'] = self::setHashtags($item['body']);
1802
1803                 // Fill the cache field
1804                 self::putInCache($item);
1805
1806                 if (stristr($item['verb'], Activity::POKE)) {
1807                         $notify_type = Delivery::POKE;
1808                 } else {
1809                         $notify_type = Delivery::POST;
1810                 }
1811
1812                 $like_no_comment = DI::config()->get('system', 'like_no_comment');
1813
1814                 DBA::transaction();
1815
1816                 if (!in_array($item['verb'], self::ACTIVITIES)) {
1817                         $item['icid'] = self::insertContent($item);
1818                 }
1819
1820                 $body = $item['body'];
1821
1822                 // We just remove everything that is content
1823                 foreach (array_merge(self::CONTENT_FIELDLIST, self::MIXED_CONTENT_FIELDLIST) as $field) {
1824                         unset($item[$field]);
1825                 }
1826
1827                 unset($item['activity']);
1828
1829                 // Filling item related side tables
1830
1831                 // Diaspora signature
1832                 if (!empty($item['diaspora_signed_text'])) {
1833                         DBA::insert('diaspora-interaction', ['uri-id' => $item['uri-id'], 'interaction' => $item['diaspora_signed_text']], true);
1834                 }
1835
1836                 unset($item['diaspora_signed_text']);
1837
1838                 // Attached file links
1839                 if (!empty($item['file'])) {
1840                         Category::storeTextByURIId($item['uri-id'], $item['uid'], $item['file']);
1841                 }
1842
1843                 unset($item['file']);
1844
1845                 // Delivery relevant data
1846                 $delivery_data = Post\DeliveryData::extractFields($item);
1847                 unset($item['postopts']);
1848                 unset($item['inform']);
1849
1850                 if (!empty($item['origin']) || !empty($item['wall']) || !empty($delivery_data['postopts']) || !empty($delivery_data['inform'])) {
1851                         Post\DeliveryData::insert($item['uri-id'], $delivery_data);
1852                 }
1853
1854                 // Store tags from the body if this hadn't been handled previously in the protocol classes
1855                 if (!Tag::existsForPost($item['uri-id'])) {
1856                         Tag::storeFromBody($item['uri-id'], $body);
1857                 }
1858
1859                 // Remove all fields that aren't part of the item table
1860                 foreach ($item as $field => $value) {
1861                         if (!in_array($field, $structure['item'])) {
1862                                 unset($item[$field]);
1863                         }
1864                 }
1865
1866                 $ret = DBA::insert('item', $item);
1867
1868                 // When the item was successfully stored we fetch the ID of the item.
1869                 if (DBA::isResult($ret)) {
1870                         $current_post = DBA::lastInsertId();
1871                 } else {
1872                         // This can happen - for example - if there are locking timeouts.
1873                         DBA::rollback();
1874
1875                         // Store the data into a spool file so that we can try again later.
1876                         self::spool($orig_item);
1877                         return 0;
1878                 }
1879
1880                 if ($current_post == 0) {
1881                         // This is one of these error messages that never should occur.
1882                         Logger::log("couldn't find created item - we better quit now.");
1883                         DBA::rollback();
1884                         return 0;
1885                 }
1886
1887                 // How much entries have we created?
1888                 // We wouldn't need this query when we could use an unique index - but MySQL has length problems with them.
1889                 $entries = DBA::count('item', ['uri' => $item['uri'], 'uid' => $item['uid'], 'network' => $item['network']]);
1890
1891                 if ($entries > 1) {
1892                         // There are duplicates. We delete our just created entry.
1893                         Logger::info('Delete duplicated item', ['id' => $current_post, 'uri' => $item['uri'], 'uid' => $item['uid'], 'guid' => $item['guid']]);
1894
1895                         // Yes, we could do a rollback here - but we possibly are still having users with MyISAM.
1896                         DBA::delete('item', ['id' => $current_post]);
1897                         DBA::commit();
1898                         return 0;
1899                 } elseif ($entries == 0) {
1900                         // This really should never happen since we quit earlier if there were problems.
1901                         Logger::log("Something is terribly wrong. We haven't found our created entry.");
1902                         DBA::rollback();
1903                         return 0;
1904                 }
1905
1906                 Logger::log('created item '.$current_post);
1907
1908                 if (!$parent_id || ($item['parent-uri'] === $item['uri'])) {
1909                         $parent_id = $current_post;
1910                 }
1911
1912                 // Set parent id
1913                 DBA::update('item', ['parent' => $parent_id], ['id' => $current_post]);
1914
1915                 $item['id'] = $current_post;
1916                 $item['parent'] = $parent_id;
1917
1918                 // update the commented timestamp on the parent
1919                 // Only update "commented" if it is really a comment
1920                 if (($item['gravity'] != GRAVITY_ACTIVITY) || !$like_no_comment) {
1921                         DBA::update('item', ['commented' => DateTimeFormat::utcNow(), 'changed' => DateTimeFormat::utcNow()], ['id' => $parent_id]);
1922                 } else {
1923                         DBA::update('item', ['changed' => DateTimeFormat::utcNow()], ['id' => $parent_id]);
1924                 }
1925
1926                 if ($item['parent-uri'] === $item['uri']) {
1927                         self::addThread($current_post);
1928                 } else {
1929                         self::updateThread($parent_id);
1930                 }
1931                 DBA::commit();
1932
1933                 // In that function we check if this is a forum post. Additionally we delete the item under certain circumstances
1934                 if (self::tagDeliver($item['uid'], $current_post)) {
1935                         // Get the user information for the logging
1936                         $user = User::getById($uid);
1937
1938                         Logger::notice('Item had been deleted', ['id' => $current_post, 'user' => $uid, 'account-type' => $user['account-type']]);
1939                         return 0;
1940                 }
1941
1942                 if (!$dontcache) {
1943                         $posted_item = self::selectFirst(self::ITEM_FIELDLIST, ['id' => $current_post]);
1944                         if (DBA::isResult($posted_item)) {
1945                                 if ($notify) {
1946                                         Hook::callAll('post_local_end', $posted_item);
1947                                 } else {
1948                                         Hook::callAll('post_remote_end', $posted_item);
1949                                 }
1950                         } else {
1951                                 Logger::log('new item not found in DB, id ' . $current_post);
1952                         }
1953                 }
1954
1955                 if ($item['parent-uri'] === $item['uri']) {
1956                         self::addShadow($current_post);
1957                 } else {
1958                         self::addShadowPost($current_post);
1959                 }
1960
1961                 self::updateContact($item);
1962
1963                 UserItem::setNotification($current_post);
1964
1965                 check_user_notification($current_post);
1966
1967                 // Distribute items to users who subscribed to their tags
1968                 self::distributeByTags($item, $orig_item);
1969
1970                 $transmit = $notify || ($item['visible'] && ($parent_origin || $item['origin']));
1971
1972                 if ($transmit) {
1973                         $transmit_item = Item::selectFirst(['verb', 'origin'], ['id' => $item['id']]);
1974                         // Don't relay participation messages
1975                         if (($transmit_item['verb'] == Activity::FOLLOW) &&
1976                                 (!$transmit_item['origin'] || ($item['author-id'] != Contact::getPublicIdByUserId($uid)))) {
1977                                 Logger::info('Participation messages will not be relayed', ['item' => $item['id'], 'uri' => $item['uri'], 'verb' => $transmit_item['verb']]);
1978                                 $transmit = false;
1979                         }
1980                 }
1981
1982                 if ($transmit) {
1983                         Worker::add(['priority' => $priority, 'dont_fork' => true], 'Notifier', $notify_type, $current_post);
1984                 }
1985
1986                 return $current_post;
1987         }
1988
1989         /**
1990          * Distribute the given item to users who subscribed to their tags
1991          *
1992          * @param array $item     Processed item
1993          * @param array $original Original item
1994          */
1995         private static function distributeByTags(array $item, array $original)
1996         {
1997                 if (($item['uid'] != 0) || ($item['gravity'] != GRAVITY_PARENT) || !in_array($item['network'], Protocol::FEDERATED)) {
1998                         return;
1999                 }
2000
2001                 $uids = Tag::getUIDListByURIId($item['uri-id']);
2002                 foreach ($uids as $uid) {
2003                         $original['uri-id'] = $item['uri-id'];
2004                         $stored = self::storeForUser($original, $uid);
2005                         Logger::info('Stored item for users', ['uri-id' => $item['uri-id'], 'uid' => $uid, 'stored' => $stored]);
2006                 }
2007         }
2008
2009         /**
2010          * Insert a new item content entry
2011          *
2012          * @param array $item The item fields that are to be inserted
2013          * @throws \Exception
2014          */
2015         private static function insertContent(array $item)
2016         {
2017                 $fields = ['uri-plink-hash' => (string)$item['uri-id'], 'uri-id' => $item['uri-id']];
2018
2019                 foreach (array_merge(self::CONTENT_FIELDLIST, self::MIXED_CONTENT_FIELDLIST) as $field) {
2020                         if (isset($item[$field])) {
2021                                 $fields[$field] = $item[$field];
2022                         }
2023                 }
2024
2025                 $item_content = DBA::selectFirst('item-content', ['id'], ['uri-id' => $item['uri-id']]);
2026                 if (DBA::isResult($item_content)) {
2027                         $icid = $item_content['id'];
2028                         Logger::info('Content found', ['icid' => $icid, 'uri' => $item['uri']]);
2029                         return $icid;
2030                 }
2031
2032                 DBA::insert('item-content', $fields, true);
2033                 $icid = DBA::lastInsertId();
2034                 if ($icid != 0) {
2035                         Logger::info('Content inserted', ['icid' => $icid, 'uri' => $item['uri']]);
2036                         return $icid;
2037                 }
2038
2039                 // Possibly there can be timing issues. Then the same content could be inserted multiple times.
2040                 // Due to the indexes this doesn't happen, but "lastInsertId" will be empty in these situations.
2041                 // So we have to fetch the id manually. This is no bug and there is no data loss.
2042                 $item_content = DBA::selectFirst('item-content', ['id'], ['uri-id' => $item['uri-id']]);
2043                 if (DBA::isResult($item_content)) {
2044                         $icid = $item_content['id'];
2045                         Logger::notice('Content inserted with empty lastInsertId', ['icid' => $icid, 'uri' => $item['uri']]);
2046                         return $icid;
2047                 }
2048
2049                 // This shouldn't happen.
2050                 Logger::error("Content wasn't inserted", $item);
2051                 return null;
2052         }
2053
2054         /**
2055          * Update existing item content entries
2056          *
2057          * @param array $item      The item fields that are to be changed
2058          * @param array $condition The condition for finding the item content entries
2059          * @throws \Exception
2060          */
2061         private static function updateContent($item, $condition)
2062         {
2063                 // We have to select only the fields from the "item-content" table
2064                 $fields = [];
2065                 foreach (array_merge(self::CONTENT_FIELDLIST, self::MIXED_CONTENT_FIELDLIST) as $field) {
2066                         if (isset($item[$field])) {
2067                                 $fields[$field] = $item[$field];
2068                         }
2069                 }
2070
2071                 if (empty($fields)) {
2072                         return;
2073                 }
2074
2075                 DBA::update('item-content', $fields, $condition, true);
2076                 Logger::info('Updated content', ['condition' => $condition]);
2077         }
2078
2079         /**
2080          * Distributes public items to the receivers
2081          *
2082          * @param integer $itemid      Item ID that should be added
2083          * @param string  $signed_text Original text (for Diaspora signatures), JSON encoded.
2084          * @throws \Exception
2085          */
2086         public static function distribute($itemid, $signed_text = '')
2087         {
2088                 $condition = ["`id` IN (SELECT `parent` FROM `item` WHERE `id` = ?)", $itemid];
2089                 $parent = self::selectFirst(['owner-id'], $condition);
2090                 if (!DBA::isResult($parent)) {
2091                         return;
2092                 }
2093
2094                 // Only distribute public items from native networks
2095                 $condition = ['id' => $itemid, 'uid' => 0,
2096                         'network' => array_merge(Protocol::FEDERATED ,['']),
2097                         'visible' => true, 'deleted' => false, 'moderated' => false, 'private' => [self::PUBLIC, self::UNLISTED]];
2098                 $item = self::selectFirst(self::ITEM_FIELDLIST, $condition);
2099                 if (!DBA::isResult($item)) {
2100                         return;
2101                 }
2102
2103                 $origin = $item['origin'];
2104
2105                 $users = [];
2106
2107                 /// @todo add a field "pcid" in the contact table that referrs to the public contact id.
2108                 $owner = DBA::selectFirst('contact', ['url', 'nurl', 'alias'], ['id' => $parent['owner-id']]);
2109                 if (!DBA::isResult($owner)) {
2110                         return;
2111                 }
2112
2113                 $condition = ['nurl' => $owner['nurl'], 'rel' => [Contact::SHARING, Contact::FRIEND]];
2114                 $contacts = DBA::select('contact', ['uid'], $condition);
2115                 while ($contact = DBA::fetch($contacts)) {
2116                         if ($contact['uid'] == 0) {
2117                                 continue;
2118                         }
2119
2120                         $users[$contact['uid']] = $contact['uid'];
2121                 }
2122                 DBA::close($contacts);
2123
2124                 $condition = ['alias' => $owner['url'], 'rel' => [Contact::SHARING, Contact::FRIEND]];
2125                 $contacts = DBA::select('contact', ['uid'], $condition);
2126                 while ($contact = DBA::fetch($contacts)) {
2127                         if ($contact['uid'] == 0) {
2128                                 continue;
2129                         }
2130
2131                         $users[$contact['uid']] = $contact['uid'];
2132                 }
2133                 DBA::close($contacts);
2134
2135                 if (!empty($owner['alias'])) {
2136                         $condition = ['nurl' => Strings::normaliseLink($owner['alias']), 'rel' => [Contact::SHARING, Contact::FRIEND]];
2137                         $contacts = DBA::select('contact', ['uid'], $condition);
2138                         while ($contact = DBA::fetch($contacts)) {
2139                                 if ($contact['uid'] == 0) {
2140                                         continue;
2141                                 }
2142
2143                                 $users[$contact['uid']] = $contact['uid'];
2144                         }
2145                         DBA::close($contacts);
2146                 }
2147
2148                 $origin_uid = 0;
2149
2150                 if ($item['uri'] != $item['parent-uri']) {
2151                         $parents = self::select(['uid', 'origin'], ["`uri` = ? AND `uid` != 0", $item['parent-uri']]);
2152                         while ($parent = self::fetch($parents)) {
2153                                 $users[$parent['uid']] = $parent['uid'];
2154                                 if ($parent['origin'] && !$origin) {
2155                                         $origin_uid = $parent['uid'];
2156                                 }
2157                         }
2158                 }
2159
2160                 foreach ($users as $uid) {
2161                         if ($origin_uid == $uid) {
2162                                 $item['diaspora_signed_text'] = $signed_text;
2163                         }
2164                         self::storeForUser($item, $uid);
2165                 }
2166         }
2167
2168         /**
2169          * Store public items for the receivers
2170          *
2171          * @param array   $item   The item entry that will be stored
2172          * @param integer $uid    The user that will receive the item entry
2173          * @return integer stored item id
2174          * @throws \Exception
2175          */
2176         private static function storeForUser(array $item, int $uid)
2177         {
2178                 if (self::exists(['uri-id' => $item['uri-id'], 'uid' => $uid])) {
2179                         Logger::info('Item already exists', ['uri-id' => $item['uri-id'], 'uid' => $uid]);
2180                         return 0;
2181                 }
2182
2183                 unset($item['id']);
2184                 unset($item['parent']);
2185                 unset($item['mention']);
2186                 unset($item['starred']);
2187
2188                 $item['uid'] = $uid;
2189                 $item['origin'] = 0;
2190                 $item['wall'] = 0;
2191
2192                 if ($item['uri'] == $item['parent-uri']) {
2193                         $contact = Contact::getByURLForUser($item['owner-link'], $uid, false, ['id']);
2194                 } else {
2195                         $contact = Contact::getByURLForUser($item['author-link'], $uid, false, ['id']);
2196                 }
2197
2198                 if (!empty($item['contact-id'])) {
2199                         $item['contact-id'] = $contact['id'];
2200                 } else {
2201                         // Shouldn't happen at all
2202                         $self = DBA::selectFirst('contact', ['id'], ['self' => true, 'uid' => $uid]);
2203                         if (!DBA::isResult($self)) {
2204                                 // Shouldn't happen even less
2205                                 return 0;
2206                         }
2207                         $item['contact-id'] = $self['id'];
2208                 }
2209
2210                 /// @todo Handling of "event-id"
2211
2212                 $notify = false;
2213                 if ($item['uri'] == $item['parent-uri']) {
2214                         $contact = DBA::selectFirst('contact', [], ['id' => $item['contact-id'], 'self' => false]);
2215                         if (DBA::isResult($contact)) {
2216                                 $notify = self::isRemoteSelf($contact, $item);
2217                         }
2218                 }
2219
2220                 $distributed = self::insert($item, $notify, true);
2221
2222                 if (!$distributed) {
2223                         Logger::info("Distributed public item wasn't stored", ['uri-id' => $item['uri-id'], 'user' => $uid]);
2224                 } else {
2225                         Logger::info('Distributed public item was stored', ['uri-id' => $item['uri-id'], 'user' => $uid, 'stored' => $distributed]);
2226                 }
2227                 return $distributed;
2228         }
2229
2230         /**
2231          * Add a shadow entry for a given item id that is a thread starter
2232          *
2233          * We store every public item entry additionally with the user id "0".
2234          * This is used for the community page and for the search.
2235          * It is planned that in the future we will store public item entries only once.
2236          *
2237          * @param integer $itemid Item ID that should be added
2238          * @throws \Exception
2239          */
2240         public static function addShadow($itemid)
2241         {
2242                 $fields = ['uid', 'private', 'moderated', 'visible', 'deleted', 'network', 'uri'];
2243                 $condition = ['id' => $itemid, 'parent' => [0, $itemid]];
2244                 $item = self::selectFirst($fields, $condition);
2245
2246                 if (!DBA::isResult($item)) {
2247                         return;
2248                 }
2249
2250                 // is it already a copy?
2251                 if (($itemid == 0) || ($item['uid'] == 0)) {
2252                         return;
2253                 }
2254
2255                 // Is it a visible public post?
2256                 if (!$item["visible"] || $item["deleted"] || $item["moderated"] || ($item["private"] == Item::PRIVATE)) {
2257                         return;
2258                 }
2259
2260                 // is it an entry from a connector? Only add an entry for natively connected networks
2261                 if (!in_array($item["network"], array_merge(Protocol::FEDERATED ,['']))) {
2262                         return;
2263                 }
2264
2265                 if (self::exists(['uri' => $item['uri'], 'uid' => 0])) {
2266                         return;
2267                 }
2268
2269                 $item = self::selectFirst(self::ITEM_FIELDLIST, ['id' => $itemid]);
2270
2271                 if (DBA::isResult($item)) {
2272                         // Preparing public shadow (removing user specific data)
2273                         $item['uid'] = 0;
2274                         unset($item['id']);
2275                         unset($item['parent']);
2276                         unset($item['wall']);
2277                         unset($item['mention']);
2278                         unset($item['origin']);
2279                         unset($item['starred']);
2280                         unset($item['postopts']);
2281                         unset($item['inform']);
2282                         if ($item['uri'] == $item['parent-uri']) {
2283                                 $item['contact-id'] = $item['owner-id'];
2284                         } else {
2285                                 $item['contact-id'] = $item['author-id'];
2286                         }
2287
2288                         $public_shadow = self::insert($item, false, true);
2289
2290                         Logger::info('Stored public shadow', ['thread' => $itemid, 'id' => $public_shadow]);
2291                 }
2292         }
2293
2294         /**
2295          * Add a shadow entry for a given item id that is a comment
2296          *
2297          * This function does the same like the function above - but for comments
2298          *
2299          * @param integer $itemid Item ID that should be added
2300          * @throws \Exception
2301          */
2302         public static function addShadowPost($itemid)
2303         {
2304                 $item = self::selectFirst(self::ITEM_FIELDLIST, ['id' => $itemid]);
2305                 if (!DBA::isResult($item)) {
2306                         return;
2307                 }
2308
2309                 // Is it a toplevel post?
2310                 if ($item['gravity'] == GRAVITY_PARENT) {
2311                         self::addShadow($itemid);
2312                         return;
2313                 }
2314
2315                 // Is this a shadow entry?
2316                 if ($item['uid'] == 0) {
2317                         return;
2318                 }
2319
2320                 // Is there a shadow parent?
2321                 if (!self::exists(['uri' => $item['parent-uri'], 'uid' => 0])) {
2322                         return;
2323                 }
2324
2325                 // Is there already a shadow entry?
2326                 if (self::exists(['uri' => $item['uri'], 'uid' => 0])) {
2327                         return;
2328                 }
2329
2330                 // Save "origin" and "parent" state
2331                 $origin = $item['origin'];
2332                 $parent = $item['parent'];
2333
2334                 // Preparing public shadow (removing user specific data)
2335                 $item['uid'] = 0;
2336                 unset($item['id']);
2337                 unset($item['parent']);
2338                 unset($item['wall']);
2339                 unset($item['mention']);
2340                 unset($item['origin']);
2341                 unset($item['starred']);
2342                 unset($item['postopts']);
2343                 unset($item['inform']);
2344                 $item['contact-id'] = Contact::getIdForURL($item['author-link']);
2345
2346                 $public_shadow = self::insert($item, false, true);
2347
2348                 Logger::info('Stored public shadow', ['uri' => $item['uri'], 'id' => $public_shadow]);
2349
2350                 // If this was a comment to a Diaspora post we don't get our comment back.
2351                 // This means that we have to distribute the comment by ourselves.
2352                 if ($origin && self::exists(['id' => $parent, 'network' => Protocol::DIASPORA])) {
2353                         self::distribute($public_shadow);
2354                 }
2355         }
2356
2357         /**
2358          * Adds a language specification in a "language" element of given $arr.
2359          * Expects "body" element to exist in $arr.
2360          *
2361          * @param array $item
2362          * @return string detected language
2363          * @throws \Text_LanguageDetect_Exception
2364          */
2365         private static function getLanguage(array $item)
2366         {
2367                 $naked_body = BBCode::toPlaintext($item['body'], false);
2368
2369                 $ld = new Text_LanguageDetect();
2370                 $ld->setNameMode(2);
2371                 $languages = $ld->detect($naked_body, 3);
2372                 if (is_array($languages)) {
2373                         return json_encode($languages);
2374                 }
2375
2376                 return '';
2377         }
2378
2379         /**
2380          * Creates an unique guid out of a given uri
2381          *
2382          * @param string $uri uri of an item entry
2383          * @param string $host hostname for the GUID prefix
2384          * @return string unique guid
2385          */
2386         public static function guidFromUri($uri, $host)
2387         {
2388                 // Our regular guid routine is using this kind of prefix as well
2389                 // We have to avoid that different routines could accidentally create the same value
2390                 $parsed = parse_url($uri);
2391
2392                 // We use a hash of the hostname as prefix for the guid
2393                 $guid_prefix = hash("crc32", $host);
2394
2395                 // Remove the scheme to make sure that "https" and "http" doesn't make a difference
2396                 unset($parsed["scheme"]);
2397
2398                 // Glue it together to be able to make a hash from it
2399                 $host_id = implode("/", $parsed);
2400
2401                 // We could use any hash algorithm since it isn't a security issue
2402                 $host_hash = hash("ripemd128", $host_id);
2403
2404                 return $guid_prefix.$host_hash;
2405         }
2406
2407         /**
2408          * generate an unique URI
2409          *
2410          * @param integer $uid  User id
2411          * @param string  $guid An existing GUID (Otherwise it will be generated)
2412          *
2413          * @return string
2414          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
2415          */
2416         public static function newURI($uid, $guid = "")
2417         {
2418                 if ($guid == "") {
2419                         $guid = System::createUUID();
2420                 }
2421
2422                 return DI::baseUrl()->get() . '/objects/' . $guid;
2423         }
2424
2425         /**
2426          * Set "success_update" and "last-item" to the date of the last time we heard from this contact
2427          *
2428          * This can be used to filter for inactive contacts.
2429          * Only do this for public postings to avoid privacy problems, since poco data is public.
2430          * Don't set this value if it isn't from the owner (could be an author that we don't know)
2431          *
2432          * @param array $arr Contains the just posted item record
2433          * @throws \Exception
2434          */
2435         private static function updateContact($arr)
2436         {
2437                 // Unarchive the author
2438                 $contact = DBA::selectFirst('contact', [], ['id' => $arr["author-id"]]);
2439                 if (DBA::isResult($contact)) {
2440                         Contact::unmarkForArchival($contact);
2441                 }
2442
2443                 // Unarchive the contact if it's not our own contact
2444                 $contact = DBA::selectFirst('contact', [], ['id' => $arr["contact-id"], 'self' => false]);
2445                 if (DBA::isResult($contact)) {
2446                         Contact::unmarkForArchival($contact);
2447                 }
2448
2449                 /// @todo On private posts we could obfuscate the date
2450                 $update = ($arr['private'] != self::PRIVATE) || in_array($arr['network'], Protocol::FEDERATED);
2451
2452                 // Is it a forum? Then we don't care about the rules from above
2453                 if (!$update && in_array($arr["network"], [Protocol::ACTIVITYPUB, Protocol::DFRN]) && ($arr["parent-uri"] === $arr["uri"])) {
2454                         if (DBA::exists('contact', ['id' => $arr['contact-id'], 'forum' => true])) {
2455                                 $update = true;
2456                         }
2457                 }
2458
2459                 if ($update) {
2460                         // The "self" contact id is used (for example in the connectors) when the contact is unknown
2461                         // So we have to ensure to only update the last item when it had been our own post,
2462                         // or it had been done by a "regular" contact.
2463                         if (!empty($arr['wall'])) {
2464                                 $condition = ['id' => $arr['contact-id']];
2465                         } else {
2466                                 $condition = ['id' => $arr['contact-id'], 'self' => false];
2467                         }
2468                         DBA::update('contact', ['failed' => false, 'success_update' => $arr['received'], 'last-item' => $arr['received']], $condition);
2469                 }
2470                 // Now do the same for the system wide contacts with uid=0
2471                 if ($arr['private'] != self::PRIVATE) {
2472                         DBA::update('contact', ['failed' => false, 'success_update' => $arr['received'], 'last-item' => $arr['received']],
2473                                 ['id' => $arr['owner-id']]);
2474
2475                         if ($arr['owner-id'] != $arr['author-id']) {
2476                                 DBA::update('contact', ['failed' => false, 'success_update' => $arr['received'], 'last-item' => $arr['received']],
2477                                         ['id' => $arr['author-id']]);
2478                         }
2479                 }
2480         }
2481
2482         public static function setHashtags($body)
2483         {
2484                 $body = BBCode::performWithEscapedTags($body, ['noparse', 'pre', 'code'], function ($body) {
2485                         $tags = BBCode::getTags($body);
2486
2487                         // No hashtags?
2488                         if (!count($tags)) {
2489                                 return $body;
2490                         }
2491
2492                         // This sorting is important when there are hashtags that are part of other hashtags
2493                         // Otherwise there could be problems with hashtags like #test and #test2
2494                         // Because of this we are sorting from the longest to the shortest tag.
2495                         usort($tags, function ($a, $b) {
2496                                 return strlen($b) <=> strlen($a);
2497                         });
2498
2499                         $URLSearchString = "^\[\]";
2500
2501                         // All hashtags should point to the home server if "local_tags" is activated
2502                         if (DI::config()->get('system', 'local_tags')) {
2503                                 $body = preg_replace("/#\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",
2504                                         "#[url=" . DI::baseUrl() . "/search?tag=$2]$2[/url]", $body);
2505                         }
2506
2507                         // mask hashtags inside of url, bookmarks and attachments to avoid urls in urls
2508                         $body = preg_replace_callback("/\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",
2509                                 function ($match) {
2510                                         return ("[url=" . str_replace("#", "&num;", $match[1]) . "]" . str_replace("#", "&num;", $match[2]) . "[/url]");
2511                                 }, $body);
2512
2513                         $body = preg_replace_callback("/\[bookmark\=([$URLSearchString]*)\](.*?)\[\/bookmark\]/ism",
2514                                 function ($match) {
2515                                         return ("[bookmark=" . str_replace("#", "&num;", $match[1]) . "]" . str_replace("#", "&num;", $match[2]) . "[/bookmark]");
2516                                 }, $body);
2517
2518                         $body = preg_replace_callback("/\[attachment (.*)\](.*?)\[\/attachment\]/ism",
2519                                 function ($match) {
2520                                         return ("[attachment " . str_replace("#", "&num;", $match[1]) . "]" . $match[2] . "[/attachment]");
2521                                 }, $body);
2522
2523                         // Repair recursive urls
2524                         $body = preg_replace("/&num;\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",
2525                                 "&num;$2", $body);
2526
2527                         foreach ($tags as $tag) {
2528                                 if ((strpos($tag, '#') !== 0) || strpos($tag, '[url=') || strlen($tag) < 2 || $tag[1] == '#') {
2529                                         continue;
2530                                 }
2531
2532                                 $basetag = str_replace('_', ' ', substr($tag, 1));
2533                                 $newtag = '#[url=' . DI::baseUrl() . '/search?tag=' . $basetag . ']' . $basetag . '[/url]';
2534
2535                                 $body = str_replace($tag, $newtag, $body);
2536                         }
2537
2538                         // Convert back the masked hashtags
2539                         $body = str_replace("&num;", "#", $body);
2540
2541                         return $body;
2542                 });
2543
2544                 return $body;
2545         }
2546
2547         /**
2548          * look for mention tags and setup a second delivery chain for forum/community posts if appropriate
2549          *
2550          * @param int $uid
2551          * @param int $item_id
2552          * @return boolean true if item was deleted, else false
2553          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
2554          * @throws \ImagickException
2555          */
2556         private static function tagDeliver($uid, $item_id)
2557         {
2558                 $mention = false;
2559
2560                 $user = DBA::selectFirst('user', [], ['uid' => $uid]);
2561                 if (!DBA::isResult($user)) {
2562                         return false;
2563                 }
2564
2565                 $community_page = (($user['page-flags'] == User::PAGE_FLAGS_COMMUNITY) ? true : false);
2566                 $prvgroup = (($user['page-flags'] == User::PAGE_FLAGS_PRVGROUP) ? true : false);
2567
2568                 $item = self::selectFirst(self::ITEM_FIELDLIST, ['id' => $item_id]);
2569                 if (!DBA::isResult($item)) {
2570                         return false;
2571                 }
2572
2573                 $link = Strings::normaliseLink(DI::baseUrl() . '/profile/' . $user['nickname']);
2574
2575                 /*
2576                  * Diaspora uses their own hardwired link URL in @-tags
2577                  * instead of the one we supply with webfinger
2578                  */
2579                 $dlink = Strings::normaliseLink(DI::baseUrl() . '/u/' . $user['nickname']);
2580
2581                 $cnt = preg_match_all('/[\@\!]\[url\=(.*?)\](.*?)\[\/url\]/ism', $item['body'], $matches, PREG_SET_ORDER);
2582                 if ($cnt) {
2583                         foreach ($matches as $mtch) {
2584                                 if (Strings::compareLink($link, $mtch[1]) || Strings::compareLink($dlink, $mtch[1])) {
2585                                         $mention = true;
2586                                         Logger::log('mention found: ' . $mtch[2]);
2587                                 }
2588                         }
2589                 }
2590
2591                 if (!$mention) {
2592                         if (($community_page || $prvgroup) &&
2593                                   !$item['wall'] && !$item['origin'] && ($item['gravity'] == GRAVITY_PARENT)) {
2594                                 Logger::info('Delete private group/communiy top-level item without mention', ['id' => $item_id, 'guid'=> $item['guid']]);
2595                                 DBA::delete('item', ['id' => $item_id]);
2596                                 return true;
2597                         }
2598                         return false;
2599                 }
2600
2601                 $arr = ['item' => $item, 'user' => $user];
2602
2603                 Hook::callAll('tagged', $arr);
2604
2605                 if (!$community_page && !$prvgroup) {
2606                         return false;
2607                 }
2608
2609                 /*
2610                  * tgroup delivery - setup a second delivery chain
2611                  * prevent delivery looping - only proceed
2612                  * if the message originated elsewhere and is a top-level post
2613                  */
2614                 if ($item['wall'] || $item['origin'] || ($item['id'] != $item['parent'])) {
2615                         return false;
2616                 }
2617
2618                 // now change this copy of the post to a forum head message and deliver to all the tgroup members
2619                 $self = DBA::selectFirst('contact', ['id', 'name', 'url', 'thumb'], ['uid' => $uid, 'self' => true]);
2620                 if (!DBA::isResult($self)) {
2621                         return false;
2622                 }
2623
2624                 $owner_id = Contact::getIdForURL($self['url']);
2625
2626                 // also reset all the privacy bits to the forum default permissions
2627
2628                 $private = ($user['allow_cid'] || $user['allow_gid'] || $user['deny_cid'] || $user['deny_gid']) ? self::PRIVATE : self::PUBLIC;
2629
2630                 $psid = PermissionSet::getIdFromACL(
2631                         $user['uid'],
2632                         $user['allow_cid'],
2633                         $user['allow_gid'],
2634                         $user['deny_cid'],
2635                         $user['deny_gid']
2636                 );
2637
2638                 $forum_mode = ($prvgroup ? 2 : 1);
2639
2640                 $fields = ['wall' => true, 'origin' => true, 'forum_mode' => $forum_mode, 'contact-id' => $self['id'],
2641                         'owner-id' => $owner_id, 'private' => $private, 'psid' => $psid];
2642                 self::update($fields, ['id' => $item_id]);
2643
2644                 self::updateThread($item_id);
2645
2646                 Worker::add(['priority' => PRIORITY_HIGH, 'dont_fork' => true], 'Notifier', Delivery::POST, $item_id);
2647
2648                 return false;
2649         }
2650
2651         public static function isRemoteSelf($contact, &$datarray)
2652         {
2653                 if (!$contact['remote_self']) {
2654                         return false;
2655                 }
2656
2657                 // Prevent the forwarding of posts that are forwarded
2658                 if (!empty($datarray["extid"]) && ($datarray["extid"] == Protocol::DFRN)) {
2659                         Logger::info('Already forwarded');
2660                         return false;
2661                 }
2662
2663                 // Prevent to forward already forwarded posts
2664                 if ($datarray["app"] == DI::baseUrl()->getHostname()) {
2665                         Logger::info('Already forwarded (second test)');
2666                         return false;
2667                 }
2668
2669                 // Only forward posts
2670                 if ($datarray["verb"] != Activity::POST) {
2671                         Logger::info('No post');
2672                         return false;
2673                 }
2674
2675                 if (($contact['network'] != Protocol::FEED) && ($datarray['private'] == self::PRIVATE)) {
2676                         Logger::info('Not public');
2677                         return false;
2678                 }
2679
2680                 $datarray2 = $datarray;
2681                 Logger::info('remote-self start', ['contact' => $contact['url'], 'remote_self'=> $contact['remote_self'], 'item' => $datarray]);
2682                 if ($contact['remote_self'] == 2) {
2683                         $self = DBA::selectFirst('contact', ['id', 'name', 'url', 'thumb'],
2684                                         ['uid' => $contact['uid'], 'self' => true]);
2685                         if (DBA::isResult($self)) {
2686                                 $datarray['contact-id'] = $self["id"];
2687
2688                                 $datarray['owner-name'] = $self["name"];
2689                                 $datarray['owner-link'] = $self["url"];
2690                                 $datarray['owner-avatar'] = $self["thumb"];
2691
2692                                 $datarray['author-name']   = $datarray['owner-name'];
2693                                 $datarray['author-link']   = $datarray['owner-link'];
2694                                 $datarray['author-avatar'] = $datarray['owner-avatar'];
2695
2696                                 unset($datarray['edited']);
2697
2698                                 unset($datarray['network']);
2699                                 unset($datarray['owner-id']);
2700                                 unset($datarray['author-id']);
2701                         }
2702
2703                         if ($contact['network'] != Protocol::FEED) {
2704                                 $datarray["guid"] = System::createUUID();
2705                                 unset($datarray["plink"]);
2706                                 $datarray["uri"] = self::newURI($contact['uid'], $datarray["guid"]);
2707                                 $datarray["parent-uri"] = $datarray["uri"];
2708                                 $datarray["thr-parent"] = $datarray["uri"];
2709                                 $datarray["extid"] = Protocol::DFRN;
2710                                 $urlpart = parse_url($datarray2['author-link']);
2711                                 $datarray["app"] = $urlpart["host"];
2712                         } else {
2713                                 $datarray['private'] = self::PUBLIC;
2714                         }
2715                 }
2716
2717                 if ($contact['network'] != Protocol::FEED) {
2718                         // Store the original post
2719                         $result = self::insert($datarray2);
2720                         Logger::info('remote-self post original item', ['contact' => $contact['url'], 'result'=> $result, 'item' => $datarray2]);
2721                 } else {
2722                         $datarray["app"] = "Feed";
2723                         $result = true;
2724                 }
2725
2726                 // Trigger automatic reactions for addons
2727                 $datarray['api_source'] = true;
2728
2729                 // We have to tell the hooks who we are - this really should be improved
2730                 $_SESSION["authenticated"] = true;
2731                 $_SESSION["uid"] = $contact['uid'];
2732
2733                 return $result;
2734         }
2735
2736         /**
2737          *
2738          * @param string $s
2739          * @param int    $uid
2740          * @param array  $item
2741          * @param int    $cid
2742          * @return string
2743          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
2744          * @throws \ImagickException
2745          */
2746         public static function fixPrivatePhotos($s, $uid, $item = null, $cid = 0)
2747         {
2748                 if (DI::config()->get('system', 'disable_embedded')) {
2749                         return $s;
2750                 }
2751
2752                 Logger::info('check for photos');
2753                 $site = substr(DI::baseUrl(), strpos(DI::baseUrl(), '://'));
2754
2755                 $orig_body = $s;
2756                 $new_body = '';
2757
2758                 $img_start = strpos($orig_body, '[img');
2759                 $img_st_close = ($img_start !== false ? strpos(substr($orig_body, $img_start), ']') : false);
2760                 $img_len = ($img_start !== false ? strpos(substr($orig_body, $img_start + $img_st_close + 1), '[/img]') : false);
2761
2762                 while (($img_st_close !== false) && ($img_len !== false)) {
2763                         $img_st_close++; // make it point to AFTER the closing bracket
2764                         $image = substr($orig_body, $img_start + $img_st_close, $img_len);
2765
2766                         Logger::info('found photo', ['image' => $image]);
2767
2768                         if (stristr($image, $site . '/photo/')) {
2769                                 // Only embed locally hosted photos
2770                                 $replace = false;
2771                                 $i = basename($image);
2772                                 $i = str_replace(['.jpg', '.png', '.gif'], ['', '', ''], $i);
2773                                 $x = strpos($i, '-');
2774
2775                                 if ($x) {
2776                                         $res = substr($i, $x + 1);
2777                                         $i = substr($i, 0, $x);
2778                                         $photo = Photo::getPhotoForUser($uid, $i, $res);
2779                                         if (DBA::isResult($photo)) {
2780                                                 /*
2781                                                  * Check to see if we should replace this photo link with an embedded image
2782                                                  * 1. No need to do so if the photo is public
2783                                                  * 2. If there's a contact-id provided, see if they're in the access list
2784                                                  *    for the photo. If so, embed it.
2785                                                  * 3. Otherwise, if we have an item, see if the item permissions match the photo
2786                                                  *    permissions, regardless of order but first check to see if they're an exact
2787                                                  *    match to save some processing overhead.
2788                                                  */
2789                                                 if (self::hasPermissions($photo)) {
2790                                                         if ($cid) {
2791                                                                 $recips = self::enumeratePermissions($photo);
2792                                                                 if (in_array($cid, $recips)) {
2793                                                                         $replace = true;
2794                                                                 }
2795                                                         } elseif ($item) {
2796                                                                 if (self::samePermissions($uid, $item, $photo)) {
2797                                                                         $replace = true;
2798                                                                 }
2799                                                         }
2800                                                 }
2801                                                 if ($replace) {
2802                                                         $photo_img = Photo::getImageForPhoto($photo);
2803                                                         // If a custom width and height were specified, apply before embedding
2804                                                         if (preg_match("/\[img\=([0-9]*)x([0-9]*)\]/is", substr($orig_body, $img_start, $img_st_close), $match)) {
2805                                                                 Logger::info('scaling photo');
2806
2807                                                                 $width = intval($match[1]);
2808                                                                 $height = intval($match[2]);
2809
2810                                                                 $photo_img->scaleDown(max($width, $height));
2811                                                         }
2812
2813                                                         $data = $photo_img->asString();
2814                                                         $type = $photo_img->getType();
2815
2816                                                         Logger::info('replacing photo');
2817                                                         $image = 'data:' . $type . ';base64,' . base64_encode($data);
2818                                                         Logger::debug('replaced', ['image' => $image]);
2819                                                 }
2820                                         }
2821                                 }
2822                         }
2823
2824                         $new_body = $new_body . substr($orig_body, 0, $img_start + $img_st_close) . $image . '[/img]';
2825                         $orig_body = substr($orig_body, $img_start + $img_st_close + $img_len + strlen('[/img]'));
2826                         if ($orig_body === false) {
2827                                 $orig_body = '';
2828                         }
2829
2830                         $img_start = strpos($orig_body, '[img');
2831                         $img_st_close = ($img_start !== false ? strpos(substr($orig_body, $img_start), ']') : false);
2832                         $img_len = ($img_start !== false ? strpos(substr($orig_body, $img_start + $img_st_close + 1), '[/img]') : false);
2833                 }
2834
2835                 $new_body = $new_body . $orig_body;
2836
2837                 return $new_body;
2838         }
2839
2840         private static function hasPermissions($obj)
2841         {
2842                 return !empty($obj['allow_cid']) || !empty($obj['allow_gid']) ||
2843                         !empty($obj['deny_cid']) || !empty($obj['deny_gid']);
2844         }
2845
2846         private static function samePermissions($uid, $obj1, $obj2)
2847         {
2848                 // first part is easy. Check that these are exactly the same.
2849                 if (($obj1['allow_cid'] == $obj2['allow_cid'])
2850                         && ($obj1['allow_gid'] == $obj2['allow_gid'])
2851                         && ($obj1['deny_cid'] == $obj2['deny_cid'])
2852                         && ($obj1['deny_gid'] == $obj2['deny_gid'])) {
2853                         return true;
2854                 }
2855
2856                 // This is harder. Parse all the permissions and compare the resulting set.
2857                 $recipients1 = self::enumeratePermissions($obj1);
2858                 $recipients2 = self::enumeratePermissions($obj2);
2859                 sort($recipients1);
2860                 sort($recipients2);
2861
2862                 /// @TODO Comparison of arrays, maybe use array_diff_assoc() here?
2863                 return ($recipients1 == $recipients2);
2864         }
2865
2866         /**
2867          * Returns an array of contact-ids that are allowed to see this object
2868          *
2869          * @param array $obj        Item array with at least uid, allow_cid, allow_gid, deny_cid and deny_gid
2870          * @param bool  $check_dead Prunes unavailable contacts from the result
2871          * @return array
2872          * @throws \Exception
2873          */
2874         public static function enumeratePermissions(array $obj, bool $check_dead = false)
2875         {
2876                 $aclFormater = DI::aclFormatter();
2877
2878                 $allow_people = $aclFormater->expand($obj['allow_cid']);
2879                 $allow_groups = Group::expand($obj['uid'], $aclFormater->expand($obj['allow_gid']), $check_dead);
2880                 $deny_people  = $aclFormater->expand($obj['deny_cid']);
2881                 $deny_groups  = Group::expand($obj['uid'], $aclFormater->expand($obj['deny_gid']), $check_dead);
2882                 $recipients   = array_unique(array_merge($allow_people, $allow_groups));
2883                 $deny         = array_unique(array_merge($deny_people, $deny_groups));
2884                 $recipients   = array_diff($recipients, $deny);
2885                 return $recipients;
2886         }
2887
2888         public static function expire($uid, $days, $network = "", $force = false)
2889         {
2890                 if (!$uid || ($days < 1)) {
2891                         return;
2892                 }
2893
2894                 $condition = ["`uid` = ? AND NOT `deleted` AND `gravity` = ?",
2895                         $uid, GRAVITY_PARENT];
2896
2897                 /*
2898                  * $expire_network_only = save your own wall posts
2899                  * and just expire conversations started by others
2900                  */
2901                 $expire_network_only = DI::pConfig()->get($uid, 'expire', 'network_only', false);
2902
2903                 if ($expire_network_only) {
2904                         $condition[0] .= " AND NOT `wall`";
2905                 }
2906
2907                 if ($network != "") {
2908                         $condition[0] .= " AND `network` = ?";
2909                         $condition[] = $network;
2910                 }
2911
2912                 $condition[0] .= " AND `received` < UTC_TIMESTAMP() - INTERVAL ? DAY";
2913                 $condition[] = $days;
2914
2915                 $items = self::select(['file', 'resource-id', 'starred', 'type', 'id', 'post-type'], $condition);
2916
2917                 if (!DBA::isResult($items)) {
2918                         return;
2919                 }
2920
2921                 $expire_items = DI::pConfig()->get($uid, 'expire', 'items', true);
2922
2923                 // Forcing expiring of items - but not notes and marked items
2924                 if ($force) {
2925                         $expire_items = true;
2926                 }
2927
2928                 $expire_notes = DI::pConfig()->get($uid, 'expire', 'notes', true);
2929                 $expire_starred = DI::pConfig()->get($uid, 'expire', 'starred', true);
2930                 $expire_photos = DI::pConfig()->get($uid, 'expire', 'photos', false);
2931
2932                 $expired = 0;
2933
2934                 while ($item = Item::fetch($items)) {
2935                         // don't expire filed items
2936
2937                         if (strpos($item['file'], '[') !== false) {
2938                                 continue;
2939                         }
2940
2941                         // Only expire posts, not photos and photo comments
2942
2943                         if (!$expire_photos && strlen($item['resource-id'])) {
2944                                 continue;
2945                         } elseif (!$expire_starred && intval($item['starred'])) {
2946                                 continue;
2947                         } elseif (!$expire_notes && (($item['type'] == 'note') || ($item['post-type'] == Item::PT_PERSONAL_NOTE))) {
2948                                 continue;
2949                         } elseif (!$expire_items && ($item['type'] != 'note') && ($item['post-type'] != Item::PT_PERSONAL_NOTE)) {
2950                                 continue;
2951                         }
2952
2953                         self::markForDeletionById($item['id'], PRIORITY_LOW);
2954
2955                         ++$expired;
2956                 }
2957                 DBA::close($items);
2958                 Logger::log('User ' . $uid . ": expired $expired items; expire items: $expire_items, expire notes: $expire_notes, expire starred: $expire_starred, expire photos: $expire_photos");
2959         }
2960
2961         public static function firstPostDate($uid, $wall = false)
2962         {
2963                 $condition = ['uid' => $uid, 'wall' => $wall, 'deleted' => false, 'visible' => true, 'moderated' => false];
2964                 $params = ['order' => ['received' => false]];
2965                 $thread = DBA::selectFirst('thread', ['received'], $condition, $params);
2966                 if (DBA::isResult($thread)) {
2967                         return substr(DateTimeFormat::local($thread['received']), 0, 10);
2968                 }
2969                 return false;
2970         }
2971
2972         /**
2973          * add/remove activity to an item
2974          *
2975          * Toggle activities as like,dislike,attend of an item
2976          *
2977          * @param string $item_id
2978          * @param string $verb
2979          *            Activity verb. One of
2980          *            like, unlike, dislike, undislike, attendyes, unattendyes,
2981          *            attendno, unattendno, attendmaybe, unattendmaybe
2982          * @return bool
2983          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
2984          * @throws \ImagickException
2985          * @hook  'post_local_end'
2986          *            array $arr
2987          *            'post_id' => ID of posted item
2988          */
2989         public static function performActivity($item_id, $verb)
2990         {
2991                 if (!Session::isAuthenticated()) {
2992                         return false;
2993                 }
2994
2995                 Logger::log('like: verb ' . $verb . ' item ' . $item_id);
2996
2997                 $item = self::selectFirst(self::ITEM_FIELDLIST, ['`id` = ? OR `uri` = ?', $item_id, $item_id]);
2998                 if (!DBA::isResult($item)) {
2999                         Logger::log('like: unknown item ' . $item_id);
3000                         return false;
3001                 }
3002
3003                 $item_uri = $item['uri'];
3004
3005                 $uid = $item['uid'];
3006                 if (($uid == 0) && local_user()) {
3007                         $uid = local_user();
3008                 }
3009
3010                 if (!Security::canWriteToUserWall($uid)) {
3011                         Logger::log('like: unable to write on wall ' . $uid);
3012                         return false;
3013                 }
3014
3015                 // Retrieves the local post owner
3016                 $owner_self_contact = DBA::selectFirst('contact', [], ['uid' => $uid, 'self' => true]);
3017                 if (!DBA::isResult($owner_self_contact)) {
3018                         Logger::log('like: unknown owner ' . $uid);
3019                         return false;
3020                 }
3021
3022                 // Retrieve the current logged in user's public contact
3023                 $author_id = public_contact();
3024
3025                 $author_contact = DBA::selectFirst('contact', ['url'], ['id' => $author_id]);
3026                 if (!DBA::isResult($author_contact)) {
3027                         Logger::log('like: unknown author ' . $author_id);
3028                         return false;
3029                 }
3030
3031                 // Contact-id is the uid-dependant author contact
3032                 if (local_user() == $uid) {
3033                         $item_contact_id = $owner_self_contact['id'];
3034                 } else {
3035                         $item_contact_id = Contact::getIdForURL($author_contact['url'], $uid, false);
3036                         $item_contact = DBA::selectFirst('contact', [], ['id' => $item_contact_id]);
3037                         if (!DBA::isResult($item_contact)) {
3038                                 Logger::log('like: unknown item contact ' . $item_contact_id);
3039                                 return false;
3040                         }
3041                 }
3042
3043                 $activity = null;
3044                 switch ($verb) {
3045                         case 'like':
3046                         case 'unlike':
3047                                 $activity = Activity::LIKE;
3048                                 break;
3049                         case 'dislike':
3050                         case 'undislike':
3051                                 $activity = Activity::DISLIKE;
3052                                 break;
3053                         case 'attendyes':
3054                         case 'unattendyes':
3055                                 $activity = Activity::ATTEND;
3056                                 break;
3057                         case 'attendno':
3058                         case 'unattendno':
3059                                 $activity = Activity::ATTENDNO;
3060                                 break;
3061                         case 'attendmaybe':
3062                         case 'unattendmaybe':
3063                                 $activity = Activity::ATTENDMAYBE;
3064                                 break;
3065                         case 'follow':
3066                         case 'unfollow':
3067                                 $activity = Activity::FOLLOW;
3068                                 break;
3069                         default:
3070                                 Logger::log('like: unknown verb ' . $verb . ' for item ' . $item_id);
3071                                 return false;
3072                 }
3073
3074                 $mode = Strings::startsWith($verb, 'un') ? 'delete' : 'create';
3075
3076                 // Enable activity toggling instead of on/off
3077                 $event_verb_flag = $activity === Activity::ATTEND || $activity === Activity::ATTENDNO || $activity === Activity::ATTENDMAYBE;
3078
3079                 // Look for an existing verb row
3080                 // Event participation activities are mutually exclusive, only one of them can exist at all times.
3081                 if ($event_verb_flag) {
3082                         $verbs = [Activity::ATTEND, Activity::ATTENDNO, Activity::ATTENDMAYBE];
3083
3084                         // Translate to the index based activity index
3085                         $vids = [];
3086                         foreach ($verbs as $verb) {
3087                                 $vids[] = Verb::getID($verb);
3088                         }
3089                 } else {
3090                         $vids = Verb::getID($activity);
3091                 }
3092
3093                 $condition = ['vid' => $vids, 'deleted' => false, 'gravity' => GRAVITY_ACTIVITY,
3094                         'author-id' => $author_id, 'uid' => $item['uid'], 'thr-parent' => $item_uri];
3095                 $like_item = self::selectFirst(['id', 'guid', 'verb'], $condition);
3096
3097                 if (DBA::isResult($like_item)) {
3098                         /**
3099                          * Truth table for existing activities
3100                          *
3101                          * |          Inputs            ||      Outputs      |
3102                          * |----------------------------||-------------------|
3103                          * |  Mode  | Event | Same verb || Delete? | Return? |
3104                          * |--------|-------|-----------||---------|---------|
3105                          * | create |  Yes  |    Yes    ||   No    |   Yes   |
3106                          * | create |  Yes  |    No     ||   Yes   |   No    |
3107                          * | create |  No   |    Yes    ||   No    |   Yes   |
3108                          * | create |  No   |    No     ||        N/A†       |
3109                          * | delete |  Yes  |    Yes    ||   Yes   |   N/A‡  |
3110                          * | delete |  Yes  |    No     ||   No    |   N/A‡  |
3111                          * | delete |  No   |    Yes    ||   Yes   |   N/A‡  |
3112                          * | delete |  No   |    No     ||        N/A†       |
3113                          * |--------|-------|-----------||---------|---------|
3114                          * |   A    |   B   |     C     || A xor C | !B or C |
3115                          *
3116                          * † Can't happen: It's impossible to find an existing non-event activity without
3117                          *                 the same verb because we are only looking for this single verb.
3118                          *
3119                          * ‡ The "mode = delete" is returning early whether an existing activity was found or not.
3120                          */
3121                         if ($mode == 'create' xor $like_item['verb'] == $activity) {
3122                                 self::markForDeletionById($like_item['id']);
3123                         }
3124
3125                         if (!$event_verb_flag || $like_item['verb'] == $activity) {
3126                                 return true;
3127                         }
3128                 }
3129
3130                 // No need to go further if we aren't creating anything
3131                 if ($mode == 'delete') {
3132                         return true;
3133                 }
3134
3135                 $objtype = $item['resource-id'] ? Activity\ObjectType::IMAGE : Activity\ObjectType::NOTE;
3136
3137                 $new_item = [
3138                         'guid'          => System::createUUID(),
3139                         'uri'           => self::newURI($item['uid']),
3140                         'uid'           => $item['uid'],
3141                         'contact-id'    => $item_contact_id,
3142                         'wall'          => $item['wall'],
3143                         'origin'        => 1,
3144                         'network'       => Protocol::DFRN,
3145                         'gravity'       => GRAVITY_ACTIVITY,
3146                         'parent'        => $item['id'],
3147                         'parent-uri'    => $item['uri'],
3148                         'thr-parent'    => $item['uri'],
3149                         'owner-id'      => $author_id,
3150                         'author-id'     => $author_id,
3151                         'body'          => $activity,
3152                         'verb'          => $activity,
3153                         'object-type'   => $objtype,
3154                         'allow_cid'     => $item['allow_cid'],
3155                         'allow_gid'     => $item['allow_gid'],
3156                         'deny_cid'      => $item['deny_cid'],
3157                         'deny_gid'      => $item['deny_gid'],
3158                         'visible'       => 1,
3159                         'unseen'        => 1,
3160                 ];
3161
3162                 $signed = Diaspora::createLikeSignature($uid, $new_item);
3163                 if (!empty($signed)) {
3164                         $new_item['diaspora_signed_text'] = json_encode($signed);
3165                 }
3166
3167                 $new_item_id = self::insert($new_item);
3168
3169                 // If the parent item isn't visible then set it to visible
3170                 if (!$item['visible']) {
3171                         self::update(['visible' => true], ['id' => $item['id']]);
3172                 }
3173
3174                 $new_item['id'] = $new_item_id;
3175
3176                 Hook::callAll('post_local_end', $new_item);
3177
3178                 return true;
3179         }
3180
3181         private static function addThread($itemid, $onlyshadow = false)
3182         {
3183                 $fields = ['uid', 'created', 'edited', 'commented', 'received', 'changed', 'wall', 'private', 'pubmail',
3184                         'moderated', 'visible', 'starred', 'contact-id', 'post-type', 'uri-id',
3185                         'deleted', 'origin', 'forum_mode', 'mention', 'network', 'author-id', 'owner-id'];
3186                 $condition = ["`id` = ? AND (`parent` = ? OR `parent` = 0)", $itemid, $itemid];
3187                 $item = self::selectFirst($fields, $condition);
3188
3189                 if (!DBA::isResult($item)) {
3190                         return;
3191                 }
3192
3193                 $item['iid'] = $itemid;
3194
3195                 if (!$onlyshadow) {
3196                         $result = DBA::insert('thread', $item);
3197
3198                         Logger::info('Add thread', ['item' => $itemid, 'result' => $result]);
3199                 }
3200         }
3201
3202         private static function updateThread($itemid, $setmention = false)
3203         {
3204                 $fields = ['uid', 'guid', 'created', 'edited', 'commented', 'received', 'changed', 'post-type',
3205                         'wall', 'private', 'pubmail', 'moderated', 'visible', 'starred', 'contact-id', 'uri-id',
3206                         'deleted', 'origin', 'forum_mode', 'network', 'author-id', 'owner-id'];
3207                 $condition = ["`id` = ? AND (`parent` = ? OR `parent` = 0)", $itemid, $itemid];
3208
3209                 $item = self::selectFirst($fields, $condition);
3210                 if (!DBA::isResult($item)) {
3211                         return;
3212                 }
3213
3214                 if ($setmention) {
3215                         $item["mention"] = 1;
3216                 }
3217
3218                 $fields = [];
3219
3220                 foreach ($item as $field => $data) {
3221                         if (!in_array($field, ["guid"])) {
3222                                 $fields[$field] = $data;
3223                         }
3224                 }
3225
3226                 $result = DBA::update('thread', $fields, ['iid' => $itemid]);
3227
3228                 Logger::info('Update thread', ['item' => $itemid, 'guid' => $item["guid"], 'result' => $result]);
3229         }
3230
3231         private static function deleteThread($itemid, $itemuri = "")
3232         {
3233                 $item = DBA::selectFirst('thread', ['uid'], ['iid' => $itemid]);
3234                 if (!DBA::isResult($item)) {
3235                         Logger::info('No thread found', ['id' => $itemid]);
3236                         return;
3237                 }
3238
3239                 $result = DBA::delete('thread', ['iid' => $itemid], ['cascade' => false]);
3240
3241                 Logger::info('Deleted thread', ['item' => $itemid, 'result' => $result]);
3242
3243                 if ($itemuri != "") {
3244                         $condition = ["`uri` = ? AND NOT `deleted` AND NOT (`uid` IN (?, 0))", $itemuri, $item["uid"]];
3245                         if (!self::exists($condition)) {
3246                                 DBA::delete('item', ['uri' => $itemuri, 'uid' => 0]);
3247                                 Logger::debug('Deleted shadow item', ['id' => $itemid, 'uri' => $itemuri]);
3248                         }
3249                 }
3250         }
3251
3252         public static function getPermissionsSQLByUserId($owner_id)
3253         {
3254                 $local_user = local_user();
3255                 $remote_user = Session::getRemoteContactID($owner_id);
3256
3257                 /*
3258                  * Construct permissions
3259                  *
3260                  * default permissions - anonymous user
3261                  */
3262                 $sql = sprintf(" AND `item`.`private` != %d", self::PRIVATE);
3263
3264                 // Profile owner - everything is visible
3265                 if ($local_user && ($local_user == $owner_id)) {
3266                         $sql = '';
3267                 } elseif ($remote_user) {
3268                         /*
3269                          * Authenticated visitor. Unless pre-verified,
3270                          * check that the contact belongs to this $owner_id
3271                          * and load the groups the visitor belongs to.
3272                          * If pre-verified, the caller is expected to have already
3273                          * done this and passed the groups into this function.
3274                          */
3275                         $set = PermissionSet::get($owner_id, $remote_user);
3276
3277                         if (!empty($set)) {
3278                                 $sql_set = sprintf(" OR (`item`.`private` = %d AND `item`.`wall` AND `item`.`psid` IN (", self::PRIVATE) . implode(',', $set) . "))";
3279                         } else {
3280                                 $sql_set = '';
3281                         }
3282
3283                         $sql = sprintf(" AND (`item`.`private` != %d", self::PRIVATE) . $sql_set . ")";
3284                 }
3285
3286                 return $sql;
3287         }
3288
3289         /**
3290          * get translated item type
3291          *
3292          * @param $item
3293          * @return string
3294          */
3295         public static function postType($item)
3296         {
3297                 if (!empty($item['event-id'])) {
3298                         return DI::l10n()->t('event');
3299                 } elseif (!empty($item['resource-id'])) {
3300                         return DI::l10n()->t('photo');
3301                 } elseif ($item['gravity'] == GRAVITY_ACTIVITY) {
3302                         return DI::l10n()->t('activity');
3303                 } elseif ($item['gravity'] == GRAVITY_COMMENT) {
3304                         return DI::l10n()->t('comment');
3305                 }
3306
3307                 return DI::l10n()->t('post');
3308         }
3309
3310         /**
3311          * Sets the "rendered-html" field of the provided item
3312          *
3313          * Body is preserved to avoid side-effects as we modify it just-in-time for spoilers and private image links
3314          *
3315          * @param array $item
3316          * @param bool  $update
3317          *
3318          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
3319          * @todo Remove reference, simply return "rendered-html" and "rendered-hash"
3320          */
3321         public static function putInCache(&$item, $update = false)
3322         {
3323                 $body = $item["body"];
3324
3325                 $rendered_hash = $item['rendered-hash'] ?? '';
3326                 $rendered_html = $item['rendered-html'] ?? '';
3327
3328                 if ($rendered_hash == ''
3329                         || $rendered_html == ""
3330                         || $rendered_hash != hash("md5", $item["body"])
3331                         || DI::config()->get("system", "ignore_cache")
3332                 ) {
3333                         self::addRedirToImageTags($item);
3334
3335                         $item["rendered-html"] = BBCode::convert($item["body"]);
3336                         $item["rendered-hash"] = hash("md5", $item["body"]);
3337
3338                         $hook_data = ['item' => $item, 'rendered-html' => $item['rendered-html'], 'rendered-hash' => $item['rendered-hash']];
3339                         Hook::callAll('put_item_in_cache', $hook_data);
3340                         $item['rendered-html'] = $hook_data['rendered-html'];
3341                         $item['rendered-hash'] = $hook_data['rendered-hash'];
3342                         unset($hook_data);
3343
3344                         // Force an update if the generated values differ from the existing ones
3345                         if ($rendered_hash != $item["rendered-hash"]) {
3346                                 $update = true;
3347                         }
3348
3349                         // Only compare the HTML when we forcefully ignore the cache
3350                         if (DI::config()->get("system", "ignore_cache") && ($rendered_html != $item["rendered-html"])) {
3351                                 $update = true;
3352                         }
3353
3354                         if ($update && !empty($item["id"])) {
3355                                 self::update(
3356                                         [
3357                                                 'rendered-html' => $item["rendered-html"],
3358                                                 'rendered-hash' => $item["rendered-hash"]
3359                                         ],
3360                                         ['id' => $item["id"]]
3361                                 );
3362                         }
3363                 }
3364
3365                 $item["body"] = $body;
3366         }
3367
3368         /**
3369          * Find any non-embedded images in private items and add redir links to them
3370          *
3371          * @param array &$item The field array of an item row
3372          */
3373         private static function addRedirToImageTags(array &$item)
3374         {
3375                 $app = DI::app();
3376
3377                 $matches = [];
3378                 $cnt = preg_match_all('|\[img\](http[^\[]*?/photo/[a-fA-F0-9]+?(-[0-9]\.[\w]+?)?)\[\/img\]|', $item['body'], $matches, PREG_SET_ORDER);
3379                 if ($cnt) {
3380                         foreach ($matches as $mtch) {
3381                                 if (strpos($mtch[1], '/redir') !== false) {
3382                                         continue;
3383                                 }
3384
3385                                 if ((local_user() == $item['uid']) && ($item['private'] == self::PRIVATE) && ($item['contact-id'] != $app->contact['id']) && ($item['network'] == Protocol::DFRN)) {
3386                                         $img_url = 'redir/' . $item['contact-id'] . '?url=' . urlencode($mtch[1]);
3387                                         $item['body'] = str_replace($mtch[0], '[img]' . $img_url . '[/img]', $item['body']);
3388                                 }
3389                         }
3390                 }
3391         }
3392
3393         /**
3394          * Given an item array, convert the body element from bbcode to html and add smilie icons.
3395          * If attach is true, also add icons for item attachments.
3396          *
3397          * @param array   $item
3398          * @param boolean $attach
3399          * @param boolean $is_preview
3400          * @return string item body html
3401          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
3402          * @throws \ImagickException
3403          * @hook  prepare_body_init item array before any work
3404          * @hook  prepare_body_content_filter ('item'=>item array, 'filter_reasons'=>string array) before first bbcode to html
3405          * @hook  prepare_body ('item'=>item array, 'html'=>body string, 'is_preview'=>boolean, 'filter_reasons'=>string array) after first bbcode to html
3406          * @hook  prepare_body_final ('item'=>item array, 'html'=>body string) after attach icons and blockquote special case handling (spoiler, author)
3407          */
3408         public static function prepareBody(array &$item, $attach = false, $is_preview = false)
3409         {
3410                 $a = DI::app();
3411                 Hook::callAll('prepare_body_init', $item);
3412
3413                 // In order to provide theme developers more possibilities, event items
3414                 // are treated differently.
3415                 if ($item['object-type'] === Activity\ObjectType::EVENT && isset($item['event-id'])) {
3416                         $ev = Event::getItemHTML($item);
3417                         return $ev;
3418                 }
3419
3420                 $tags = Tag::populateFromItem($item);
3421
3422                 $item['tags'] = $tags['tags'];
3423                 $item['hashtags'] = $tags['hashtags'];
3424                 $item['mentions'] = $tags['mentions'];
3425
3426                 // Compile eventual content filter reasons
3427                 $filter_reasons = [];
3428                 if (!$is_preview && public_contact() != $item['author-id']) {
3429                         if (!empty($item['content-warning']) && (!local_user() || !DI::pConfig()->get(local_user(), 'system', 'disable_cw', false))) {
3430                                 $filter_reasons[] = DI::l10n()->t('Content warning: %s', $item['content-warning']);
3431                         }
3432
3433                         $hook_data = [
3434                                 'item' => $item,
3435                                 'filter_reasons' => $filter_reasons
3436                         ];
3437                         Hook::callAll('prepare_body_content_filter', $hook_data);
3438                         $filter_reasons = $hook_data['filter_reasons'];
3439                         unset($hook_data);
3440                 }
3441
3442                 // Update the cached values if there is no "zrl=..." on the links.
3443                 $update = (!Session::isAuthenticated() && ($item["uid"] == 0));
3444
3445                 // Or update it if the current viewer is the intented viewer.
3446                 if (($item["uid"] == local_user()) && ($item["uid"] != 0)) {
3447                         $update = true;
3448                 }
3449
3450                 self::putInCache($item, $update);
3451                 $s = $item["rendered-html"];
3452
3453                 $hook_data = [
3454                         'item' => $item,
3455                         'html' => $s,
3456                         'preview' => $is_preview,
3457                         'filter_reasons' => $filter_reasons
3458                 ];
3459                 Hook::callAll('prepare_body', $hook_data);
3460                 $s = $hook_data['html'];
3461                 unset($hook_data);
3462
3463                 if (!$attach) {
3464                         // Replace the blockquotes with quotes that are used in mails.
3465                         $mailquote = '<blockquote type="cite" class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">';
3466                         $s = str_replace(['<blockquote>', '<blockquote class="spoiler">', '<blockquote class="author">'], [$mailquote, $mailquote, $mailquote], $s);
3467                         return $s;
3468                 }
3469
3470                 $as = '';
3471                 $vhead = false;
3472                 $matches = [];
3473                 preg_match_all('|\[attach\]href=\"(.*?)\" length=\"(.*?)\" type=\"(.*?)\"(?: title=\"(.*?)\")?|', $item['attach'], $matches, PREG_SET_ORDER);
3474                 foreach ($matches as $mtch) {
3475                         $mime = $mtch[3];
3476
3477                         $the_url = Contact::magicLinkById($item['author-id'], $mtch[1]);
3478
3479                         if (strpos($mime, 'video') !== false) {
3480                                 if (!$vhead) {
3481                                         $vhead = true;
3482                                         DI::page()['htmlhead'] .= Renderer::replaceMacros(Renderer::getMarkupTemplate('videos_head.tpl'));
3483                                 }
3484
3485                                 $url_parts = explode('/', $the_url);
3486                                 $id = end($url_parts);
3487                                 $as .= Renderer::replaceMacros(Renderer::getMarkupTemplate('video_top.tpl'), [
3488                                         '$video' => [
3489                                                 'id'     => $id,
3490                                                 'title'  => DI::l10n()->t('View Video'),
3491                                                 'src'    => $the_url,
3492                                                 'mime'   => $mime,
3493                                         ],
3494                                 ]);
3495                         }
3496
3497                         $filetype = strtolower(substr($mime, 0, strpos($mime, '/')));
3498                         if ($filetype) {
3499                                 $filesubtype = strtolower(substr($mime, strpos($mime, '/') + 1));
3500                                 $filesubtype = str_replace('.', '-', $filesubtype);
3501                         } else {
3502                                 $filetype = 'unkn';
3503                                 $filesubtype = 'unkn';
3504                         }
3505
3506                         $title = Strings::escapeHtml(trim(($mtch[4] ?? '') ?: $mtch[1]));
3507                         $title .= ' ' . $mtch[2] . ' ' . DI::l10n()->t('bytes');
3508
3509                         $icon = '<div class="attachtype icon s22 type-' . $filetype . ' subtype-' . $filesubtype . '"></div>';
3510                         $as .= '<a href="' . strip_tags($the_url) . '" title="' . $title . '" class="attachlink" target="_blank" rel="noopener noreferrer" >' . $icon . '</a>';
3511                 }
3512
3513                 if ($as != '') {
3514                         $s .= '<div class="body-attach">'.$as.'<div class="clear"></div></div>';
3515                 }
3516
3517                 // Map.
3518                 if (strpos($s, '<div class="map">') !== false && !empty($item['coord'])) {
3519                         $x = Map::byCoordinates(trim($item['coord']));
3520                         if ($x) {
3521                                 $s = preg_replace('/\<div class\=\"map\"\>/', '$0' . $x, $s);
3522                         }
3523                 }
3524
3525                 // Replace friendica image url size with theme preference.
3526                 if (!empty($a->theme_info['item_image_size'])) {
3527                         $ps = $a->theme_info['item_image_size'];
3528                         $s = preg_replace('|(<img[^>]+src="[^"]+/photo/[0-9a-f]+)-[0-9]|', "$1-" . $ps, $s);
3529                 }
3530
3531                 $s = HTML::applyContentFilter($s, $filter_reasons);
3532
3533                 $hook_data = ['item' => $item, 'html' => $s];
3534                 Hook::callAll('prepare_body_final', $hook_data);
3535
3536                 return $hook_data['html'];
3537         }
3538
3539         /**
3540          * get private link for item
3541          *
3542          * @param array $item
3543          * @return boolean|array False if item has not plink, otherwise array('href'=>plink url, 'title'=>translated title)
3544          * @throws \Exception
3545          */
3546         public static function getPlink($item)
3547         {
3548                 if (local_user()) {
3549                         $ret = [
3550                                 'href' => "display/" . $item['guid'],
3551                                 'orig' => "display/" . $item['guid'],
3552                                 'title' => DI::l10n()->t('View on separate page'),
3553                                 'orig_title' => DI::l10n()->t('view on separate page'),
3554                         ];
3555
3556                         if (!empty($item['plink'])) {
3557                                 $ret["href"] = DI::baseUrl()->remove($item['plink']);
3558                                 $ret["title"] = DI::l10n()->t('link to source');
3559                         }
3560                 } elseif (!empty($item['plink']) && ($item['private'] != self::PRIVATE)) {
3561                         $ret = [
3562                                 'href' => $item['plink'],
3563                                 'orig' => $item['plink'],
3564                                 'title' => DI::l10n()->t('link to source'),
3565                         ];
3566                 } else {
3567                         $ret = [];
3568                 }
3569
3570                 return $ret;
3571         }
3572
3573         /**
3574          * Is the given item array a post that is sent as starting post to a forum?
3575          *
3576          * @param array $item
3577          * @param array $owner
3578          *
3579          * @return boolean "true" when it is a forum post
3580          */
3581         public static function isForumPost(array $item, array $owner = [])
3582         {
3583                 if (empty($owner)) {
3584                         $owner = User::getOwnerDataById($item['uid']);
3585                         if (empty($owner)) {
3586                                 return false;
3587                         }
3588                 }
3589
3590                 if (($item['author-id'] == $item['owner-id']) ||
3591                         ($owner['id'] == $item['contact-id']) ||
3592                         ($item['uri'] != $item['parent-uri']) ||
3593                         $item['origin']) {
3594                         return false;
3595                 }
3596
3597                 return Contact::isForum($item['contact-id']);
3598         }
3599
3600         /**
3601          * Search item id for given URI or plink
3602          *
3603          * @param string $uri
3604          * @param integer $uid
3605          *
3606          * @return integer item id
3607          */
3608         public static function searchByLink($uri, $uid = 0)
3609         {
3610                 $ssl_uri = str_replace('http://', 'https://', $uri);
3611                 $uris = [$uri, $ssl_uri, Strings::normaliseLink($uri)];
3612
3613                 $item = DBA::selectFirst('item', ['id'], ['uri' => $uris, 'uid' => $uid]);
3614                 if (DBA::isResult($item)) {
3615                         return $item['id'];
3616                 }
3617
3618                 $itemcontent = DBA::selectFirst('item-content', ['uri-id'], ['plink' => $uris]);
3619                 if (!DBA::isResult($itemcontent)) {
3620                         return 0;
3621                 }
3622
3623                 $itemuri = DBA::selectFirst('item-uri', ['uri'], ['id' => $itemcontent['uri-id']]);
3624                 if (!DBA::isResult($itemuri)) {
3625                         return 0;
3626                 }
3627
3628                 $item = DBA::selectFirst('item', ['id'], ['uri' => $itemuri['uri'], 'uid' => $uid]);
3629                 if (DBA::isResult($item)) {
3630                         return $item['id'];
3631                 }
3632
3633                 return 0;
3634         }
3635
3636         /**
3637          * Return the URI for a link to the post
3638          *
3639          * @param string $uri URI or link to post
3640          *
3641          * @return string URI
3642          */
3643         public static function getURIByLink(string $uri)
3644         {
3645                 $ssl_uri = str_replace('http://', 'https://', $uri);
3646                 $uris = [$uri, $ssl_uri, Strings::normaliseLink($uri)];
3647
3648                 $item = DBA::selectFirst('item', ['uri'], ['uri' => $uris]);
3649                 if (DBA::isResult($item)) {
3650                         return $item['uri'];
3651                 }
3652
3653                 $itemcontent = DBA::selectFirst('item-content', ['uri-id'], ['plink' => $uris]);
3654                 if (!DBA::isResult($itemcontent)) {
3655                         return '';
3656                 }
3657
3658                 $itemuri = DBA::selectFirst('item-uri', ['uri'], ['id' => $itemcontent['uri-id']]);
3659                 if (DBA::isResult($itemuri)) {
3660                         return $itemuri['uri'];
3661                 }
3662
3663                 return '';
3664         }
3665
3666         /**
3667          * Fetches item for given URI or plink
3668          *
3669          * @param string $uri
3670          * @param integer $uid
3671          *
3672          * @return integer item id
3673          */
3674         public static function fetchByLink($uri, $uid = 0)
3675         {
3676                 $item_id = self::searchByLink($uri, $uid);
3677                 if (!empty($item_id)) {
3678                         return $item_id;
3679                 }
3680
3681                 if ($fetched_uri = ActivityPub\Processor::fetchMissingActivity($uri)) {
3682                         $item_id = self::searchByLink($fetched_uri, $uid);
3683                 } else {
3684                         $item_id = Diaspora::fetchByURL($uri);
3685                 }
3686
3687                 if (!empty($item_id)) {
3688                         return $item_id;
3689                 }
3690
3691                 return 0;
3692         }
3693
3694         /**
3695          * Return share data from an item array (if the item is shared item)
3696          * We are providing the complete Item array, because at some time in the future
3697          * we hopefully will define these values not in the body anymore but in some item fields.
3698          * This function is meant to replace all similar functions in the system.
3699          *
3700          * @param array $item
3701          *
3702          * @return array with share information
3703          */
3704         public static function getShareArray($item)
3705         {
3706                 if (!preg_match("/(.*?)\[share(.*?)\]\s?(.*?)\s?\[\/share\]\s?/ism", $item['body'], $matches)) {
3707                         return [];
3708                 }
3709
3710                 $attribute_string = $matches[2];
3711                 $attributes = ['comment' => trim($matches[1]), 'shared' => trim($matches[3])];
3712                 foreach (['author', 'profile', 'avatar', 'guid', 'posted', 'link'] as $field) {
3713                         if (preg_match("/$field=(['\"])(.+?)\\1/ism", $attribute_string, $matches)) {
3714                                 $attributes[$field] = trim(html_entity_decode($matches[2] ?? '', ENT_QUOTES, 'UTF-8'));
3715                         }
3716                 }
3717                 return $attributes;
3718         }
3719
3720         /**
3721          * Fetch item information for shared items from the original items and adds it.
3722          *
3723          * @param array $item
3724          *
3725          * @return array item array with data from the original item
3726          */
3727         public static function addShareDataFromOriginal($item)
3728         {
3729                 $shared = self::getShareArray($item);
3730                 if (empty($shared)) {
3731                         return $item;
3732                 }
3733
3734                 // Real reshares always have got a GUID.
3735                 if (empty($shared['guid'])) {
3736                         return $item;
3737                 }
3738
3739                 $uid = $item['uid'] ?? 0;
3740
3741                 // first try to fetch the item via the GUID. This will work for all reshares that had been created on this system
3742                 $shared_item = self::selectFirst(['title', 'body', 'attach'], ['guid' => $shared['guid'], 'uid' => [0, $uid]]);
3743                 if (!DBA::isResult($shared_item)) {
3744                         if (empty($shared['link'])) {
3745                                 return $item;
3746                         }
3747
3748                         // Otherwhise try to find (and possibly fetch) the item via the link. This should work for Diaspora and ActivityPub posts
3749                         $id = self::fetchByLink($shared['link'], $uid);
3750                         if (empty($id)) {
3751                                 Logger::info('Original item not found', ['url' => $shared['link'], 'callstack' => System::callstack()]);
3752                                 return $item;
3753                         }
3754
3755                         $shared_item = self::selectFirst(['title', 'body', 'attach'], ['id' => $id]);
3756                         if (!DBA::isResult($shared_item)) {
3757                                 return $item;
3758                         }
3759                         Logger::info('Got shared data from url', ['url' => $shared['link'], 'callstack' => System::callstack()]);
3760                 } else {
3761                         Logger::info('Got shared data from guid', ['guid' => $shared['guid'], 'callstack' => System::callstack()]);
3762                 }
3763
3764                 if (!empty($shared_item['title'])) {
3765                         $body = '[h3]' . $shared_item['title'] . "[/h3]\n" . $shared_item['body'];
3766                         unset($shared_item['title']);
3767                 } else {
3768                         $body = $shared_item['body'];
3769                 }
3770
3771                 $item['body'] = preg_replace("/\[share ([^\[\]]*)\].*\[\/share\]/ism", '[share $1]' . $body . '[/share]', $item['body']);
3772                 unset($shared_item['body']);
3773
3774                 return array_merge($item, $shared_item);
3775         }
3776 }