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\User::isBlocked($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\User::isBlocked($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($item['causer-id']) && Contact\User::isBlocked($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'] == $item['uri']) && Contact\User::isIgnored($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' => $item['uid']]);
1554                         }
1555
1556                         // Update the contact relations
1557                         Contact\Relation::store($parent['author-id'], $item['author-id'], $item['created']);
1558                 }
1559
1560                 return $item;
1561         }
1562
1563         /**
1564          * Get the gravity for the given item array
1565          *
1566          * @param array $item
1567          * @return integer gravity
1568          */
1569         private static function getGravity(array $item)
1570         {
1571                 $activity = DI::activity();
1572
1573                 if (isset($item['gravity'])) {
1574                         return intval($item['gravity']);
1575                 } elseif ($item['parent-uri'] === $item['uri']) {
1576                         return GRAVITY_PARENT;
1577                 } elseif ($activity->match($item['verb'], Activity::POST)) {
1578                         return GRAVITY_COMMENT;
1579                 } elseif ($activity->match($item['verb'], Activity::FOLLOW)) {
1580                         return GRAVITY_ACTIVITY;
1581                 } elseif ($activity->match($item['verb'], Activity::ANNOUNCE)) {
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, $default);
1705
1706                 // Ensure that there is an avatar cache
1707                 Contact::checkAvatarCache($item['author-id']);
1708                 Contact::checkAvatarCache($item['owner-id']);
1709
1710                 // The contact-id should be set before "self::insert" was called - but there seems to be issues sometimes
1711                 $item["contact-id"] = self::contactId($item);
1712
1713                 if (!self::isValid($item)) {
1714                         return 0;
1715                 }
1716
1717                 // We don't store the causer, we only have it here for the checks in the function above
1718                 unset($item['causer-id']);
1719                 unset($item['causer-link']);
1720
1721                 // We don't store these fields anymore in the item table
1722                 unset($item['author-link']);
1723                 unset($item['author-name']);
1724                 unset($item['author-avatar']);
1725                 unset($item['author-network']);
1726
1727                 unset($item['owner-link']);
1728                 unset($item['owner-name']);
1729                 unset($item['owner-avatar']);
1730
1731                 $item['thr-parent'] = $item['parent-uri'];
1732
1733                 if ($item['parent-uri'] != $item['uri']) {
1734                         $item = self::getParentData($item);
1735                         if (empty($item)) {
1736                                 return 0;
1737                         }
1738
1739                         $parent_id = $item['parent'];
1740                         unset($item['parent']);
1741                         $parent_origin = $item['parent_origin'];
1742                         unset($item['parent_origin']);
1743                 } else {
1744                         $parent_id = 0;
1745                         $parent_origin = $item['origin'];
1746                 }
1747
1748                 $item['parent-uri-id'] = ItemURI::getIdByURI($item['parent-uri']);
1749                 $item['thr-parent-id'] = ItemURI::getIdByURI($item['thr-parent']);
1750
1751                 // Is this item available in the global items (with uid=0)?
1752                 if ($item["uid"] == 0) {
1753                         $item["global"] = true;
1754
1755                         // Set the global flag on all items if this was a global item entry
1756                         DBA::update('item', ['global' => true], ['uri' => $item["uri"]]);
1757                 } else {
1758                         $item["global"] = self::exists(['uid' => 0, 'uri' => $item["uri"]]);
1759                 }
1760
1761                 // ACL settings
1762                 if (!empty($item["allow_cid"] . $item["allow_gid"] . $item["deny_cid"] . $item["deny_gid"])) {
1763                         $item["private"] = self::PRIVATE;
1764                 }
1765
1766                 if ($notify) {
1767                         $item['edit'] = false;
1768                         $item['parent'] = $parent_id;
1769                         Hook::callAll('post_local', $item);
1770                         unset($item['edit']);
1771                         unset($item['parent']);
1772                 } else {
1773                         Hook::callAll('post_remote', $item);
1774                 }
1775
1776                 if (!empty($item['cancel'])) {
1777                         Logger::log('post cancelled by addon.');
1778                         return 0;
1779                 }
1780
1781                 if (empty($item['vid']) && !empty($item['verb'])) {
1782                         $item['vid'] = Verb::getID($item['verb']);
1783                 }
1784
1785                 // Creates or assigns the permission set
1786                 $item['psid'] = PermissionSet::getIdFromACL(
1787                         $item['uid'],
1788                         $item['allow_cid'],
1789                         $item['allow_gid'],
1790                         $item['deny_cid'],
1791                         $item['deny_gid']
1792                 );
1793
1794                 unset($item['allow_cid']);
1795                 unset($item['allow_gid']);
1796                 unset($item['deny_cid']);
1797                 unset($item['deny_gid']);
1798
1799                 // This array field is used to trigger some automatic reactions
1800                 // It is mainly used in the "post_local" hook.
1801                 unset($item['api_source']);
1802
1803                 self::transformToForumPost($item);
1804
1805                 // Check for hashtags in the body and repair or add hashtag links
1806                 $item['body'] = self::setHashtags($item['body']);
1807
1808                 // Fill the cache field
1809                 self::putInCache($item);
1810
1811                 if (stristr($item['verb'], Activity::POKE)) {
1812                         $notify_type = Delivery::POKE;
1813                 } else {
1814                         $notify_type = Delivery::POST;
1815                 }
1816
1817                 $like_no_comment = DI::config()->get('system', 'like_no_comment');
1818
1819                 DBA::transaction();
1820
1821                 if (!in_array($item['verb'], self::ACTIVITIES)) {
1822                         $item['icid'] = self::insertContent($item);
1823                 }
1824
1825                 $body = $item['body'];
1826
1827                 // We just remove everything that is content
1828                 foreach (array_merge(self::CONTENT_FIELDLIST, self::MIXED_CONTENT_FIELDLIST) as $field) {
1829                         unset($item[$field]);
1830                 }
1831
1832                 unset($item['activity']);
1833
1834                 // Filling item related side tables
1835
1836                 // Diaspora signature
1837                 if (!empty($item['diaspora_signed_text'])) {
1838                         DBA::insert('diaspora-interaction', ['uri-id' => $item['uri-id'], 'interaction' => $item['diaspora_signed_text']], true);
1839                 }
1840
1841                 unset($item['diaspora_signed_text']);
1842
1843                 // Attached file links
1844                 if (!empty($item['file'])) {
1845                         Category::storeTextByURIId($item['uri-id'], $item['uid'], $item['file']);
1846                 }
1847
1848                 unset($item['file']);
1849
1850                 // Delivery relevant data
1851                 $delivery_data = Post\DeliveryData::extractFields($item);
1852                 unset($item['postopts']);
1853                 unset($item['inform']);
1854
1855                 if (!empty($item['origin']) || !empty($item['wall']) || !empty($delivery_data['postopts']) || !empty($delivery_data['inform'])) {
1856                         Post\DeliveryData::insert($item['uri-id'], $delivery_data);
1857                 }
1858
1859                 // Store tags from the body if this hadn't been handled previously in the protocol classes
1860                 if (!Tag::existsForPost($item['uri-id'])) {
1861                         Tag::storeFromBody($item['uri-id'], $body);
1862                 }
1863
1864                 // Remove all fields that aren't part of the item table
1865                 foreach ($item as $field => $value) {
1866                         if (!in_array($field, $structure['item'])) {
1867                                 unset($item[$field]);
1868                         }
1869                 }
1870
1871                 $ret = DBA::insert('item', $item);
1872
1873                 // When the item was successfully stored we fetch the ID of the item.
1874                 if (DBA::isResult($ret)) {
1875                         $current_post = DBA::lastInsertId();
1876                 } else {
1877                         // This can happen - for example - if there are locking timeouts.
1878                         DBA::rollback();
1879
1880                         // Store the data into a spool file so that we can try again later.
1881                         self::spool($orig_item);
1882                         return 0;
1883                 }
1884
1885                 if ($current_post == 0) {
1886                         // This is one of these error messages that never should occur.
1887                         Logger::log("couldn't find created item - we better quit now.");
1888                         DBA::rollback();
1889                         return 0;
1890                 }
1891
1892                 // How much entries have we created?
1893                 // We wouldn't need this query when we could use an unique index - but MySQL has length problems with them.
1894                 $entries = DBA::count('item', ['uri' => $item['uri'], 'uid' => $item['uid'], 'network' => $item['network']]);
1895
1896                 if ($entries > 1) {
1897                         // There are duplicates. We delete our just created entry.
1898                         Logger::info('Delete duplicated item', ['id' => $current_post, 'uri' => $item['uri'], 'uid' => $item['uid'], 'guid' => $item['guid']]);
1899
1900                         // Yes, we could do a rollback here - but we possibly are still having users with MyISAM.
1901                         DBA::delete('item', ['id' => $current_post]);
1902                         DBA::commit();
1903                         return 0;
1904                 } elseif ($entries == 0) {
1905                         // This really should never happen since we quit earlier if there were problems.
1906                         Logger::log("Something is terribly wrong. We haven't found our created entry.");
1907                         DBA::rollback();
1908                         return 0;
1909                 }
1910
1911                 Logger::log('created item '.$current_post);
1912
1913                 if (!$parent_id || ($item['parent-uri'] === $item['uri'])) {
1914                         $parent_id = $current_post;
1915                 }
1916
1917                 // Set parent id
1918                 DBA::update('item', ['parent' => $parent_id], ['id' => $current_post]);
1919
1920                 $item['id'] = $current_post;
1921                 $item['parent'] = $parent_id;
1922
1923                 // update the commented timestamp on the parent
1924                 // Only update "commented" if it is really a comment
1925                 if (($item['gravity'] != GRAVITY_ACTIVITY) || !$like_no_comment) {
1926                         DBA::update('item', ['commented' => DateTimeFormat::utcNow(), 'changed' => DateTimeFormat::utcNow()], ['id' => $parent_id]);
1927                 } else {
1928                         DBA::update('item', ['changed' => DateTimeFormat::utcNow()], ['id' => $parent_id]);
1929                 }
1930
1931                 if ($item['parent-uri'] === $item['uri']) {
1932                         self::addThread($current_post);
1933                 } else {
1934                         self::updateThread($parent_id);
1935                 }
1936                 DBA::commit();
1937
1938                 // In that function we check if this is a forum post. Additionally we delete the item under certain circumstances
1939                 if (self::tagDeliver($item['uid'], $current_post)) {
1940                         // Get the user information for the logging
1941                         $user = User::getById($uid);
1942
1943                         Logger::notice('Item had been deleted', ['id' => $current_post, 'user' => $uid, 'account-type' => $user['account-type']]);
1944                         return 0;
1945                 }
1946
1947                 if (!$dontcache) {
1948                         $posted_item = self::selectFirst(self::ITEM_FIELDLIST, ['id' => $current_post]);
1949                         if (DBA::isResult($posted_item)) {
1950                                 if ($notify) {
1951                                         Hook::callAll('post_local_end', $posted_item);
1952                                 } else {
1953                                         Hook::callAll('post_remote_end', $posted_item);
1954                                 }
1955                         } else {
1956                                 Logger::log('new item not found in DB, id ' . $current_post);
1957                         }
1958                 }
1959
1960                 if ($item['parent-uri'] === $item['uri']) {
1961                         self::addShadow($current_post);
1962                 } else {
1963                         self::addShadowPost($current_post);
1964                 }
1965
1966                 self::updateContact($item);
1967
1968                 UserItem::setNotification($current_post);
1969
1970                 check_user_notification($current_post);
1971
1972                 // Distribute items to users who subscribed to their tags
1973                 self::distributeByTags($item);
1974
1975                 $transmit = $notify || ($item['visible'] && ($parent_origin || $item['origin']));
1976
1977                 if ($transmit) {
1978                         $transmit_item = Item::selectFirst(['verb', 'origin'], ['id' => $item['id']]);
1979                         // Don't relay participation messages
1980                         if (($transmit_item['verb'] == Activity::FOLLOW) &&
1981                                 (!$transmit_item['origin'] || ($item['author-id'] != Contact::getPublicIdByUserId($uid)))) {
1982                                 Logger::info('Participation messages will not be relayed', ['item' => $item['id'], 'uri' => $item['uri'], 'verb' => $transmit_item['verb']]);
1983                                 $transmit = false;
1984                         }
1985                 }
1986
1987                 if ($transmit) {
1988                         Worker::add(['priority' => $priority, 'dont_fork' => true], 'Notifier', $notify_type, $current_post);
1989                 }
1990
1991                 return $current_post;
1992         }
1993
1994         /**
1995          * Convert items to forum posts
1996          *
1997          * (public) forum posts in the new format consist of the regular post by the author
1998          * followed by an announce message sent from the forum account.
1999          * This means we have to look out for an announce message send by a forum account.
2000          *
2001          * @param array $item
2002          * @return void
2003          */
2004         private static function transformToForumPost(array $item)
2005         {
2006                 if ($item["verb"] != Activity::ANNOUNCE) {
2007                         // No announce message, so don't do anything
2008                         return;
2009                 }
2010
2011                 $pcontact = Contact::selectFirst(['nurl'], ['id' => $item['author-id'], 'contact-type' => Contact::TYPE_COMMUNITY]);
2012                 if (empty($pcontact['nurl'])) {
2013                         // The announce message wasn't created by a forum account, so we don't need to continue
2014                         return;
2015                 }
2016
2017                 $contact = Contact::selectFirst(['id'], ['nurl' => $pcontact['nurl'], 'uid' => $item['uid']]);
2018                 if (!empty($contact['id'])) {
2019                         $condition = ['uri-id' => $item['parent-uri-id'], 'uid' => $item['uid']];
2020                         Item::update(['owner-id' => $item['author-id'], 'contact-id' => $contact['id']], $condition);
2021                         $forum_item = Item::selectFirst(['id'], $condition);
2022                         if (!empty($forum_item['id'])) {
2023                                 // This will trigger notifications like "X shared a new post"
2024                                 UserItem::setNotification($forum_item['id']);
2025
2026                                 check_user_notification($forum_item['id']);
2027                         }
2028                         LOgger::info('Convert message into a forum message', ['uri-id' => $item['uri-id'], 'parent-uri-id' => $item['parent-uri-id'], 'uid' => $item['uid'], 'owner-id' => $item['author-id'], 'contact-id' => $contact['id']]);
2029                 }
2030         }
2031
2032         /**
2033          * Distribute the given item to users who subscribed to their tags
2034          *
2035          * @param array $item     Processed item
2036          */
2037         private static function distributeByTags(array $item)
2038         {
2039                 if (($item['uid'] != 0) || ($item['gravity'] != GRAVITY_PARENT) || !in_array($item['network'], Protocol::FEDERATED)) {
2040                         return;
2041                 }
2042
2043                 $uids = Tag::getUIDListByURIId($item['uri-id']);
2044                 foreach ($uids as $uid) {
2045                         $stored = self::storeForUserByUriId($item['uri-id'], $uid);
2046                         Logger::info('Stored item for users', ['uri-id' => $item['uri-id'], 'uid' => $uid, 'stored' => $stored]);
2047                 }
2048         }
2049
2050         /**
2051          * Insert a new item content entry
2052          *
2053          * @param array $item The item fields that are to be inserted
2054          * @throws \Exception
2055          */
2056         private static function insertContent(array $item)
2057         {
2058                 $fields = ['uri-plink-hash' => (string)$item['uri-id'], 'uri-id' => $item['uri-id']];
2059
2060                 foreach (array_merge(self::CONTENT_FIELDLIST, self::MIXED_CONTENT_FIELDLIST) as $field) {
2061                         if (isset($item[$field])) {
2062                                 $fields[$field] = $item[$field];
2063                         }
2064                 }
2065
2066                 $item_content = DBA::selectFirst('item-content', ['id'], ['uri-id' => $item['uri-id']]);
2067                 if (DBA::isResult($item_content)) {
2068                         $icid = $item_content['id'];
2069                         Logger::info('Content found', ['icid' => $icid, 'uri' => $item['uri']]);
2070                         return $icid;
2071                 }
2072
2073                 DBA::insert('item-content', $fields, true);
2074                 $icid = DBA::lastInsertId();
2075                 if ($icid != 0) {
2076                         Logger::info('Content inserted', ['icid' => $icid, 'uri' => $item['uri']]);
2077                         return $icid;
2078                 }
2079
2080                 // Possibly there can be timing issues. Then the same content could be inserted multiple times.
2081                 // Due to the indexes this doesn't happen, but "lastInsertId" will be empty in these situations.
2082                 // So we have to fetch the id manually. This is no bug and there is no data loss.
2083                 $item_content = DBA::selectFirst('item-content', ['id'], ['uri-id' => $item['uri-id']]);
2084                 if (DBA::isResult($item_content)) {
2085                         $icid = $item_content['id'];
2086                         Logger::notice('Content inserted with empty lastInsertId', ['icid' => $icid, 'uri' => $item['uri']]);
2087                         return $icid;
2088                 }
2089
2090                 // This shouldn't happen.
2091                 Logger::error("Content wasn't inserted", $item);
2092                 return null;
2093         }
2094
2095         /**
2096          * Update existing item content entries
2097          *
2098          * @param array $item      The item fields that are to be changed
2099          * @param array $condition The condition for finding the item content entries
2100          * @throws \Exception
2101          */
2102         private static function updateContent($item, $condition)
2103         {
2104                 // We have to select only the fields from the "item-content" table
2105                 $fields = [];
2106                 foreach (array_merge(self::CONTENT_FIELDLIST, self::MIXED_CONTENT_FIELDLIST) as $field) {
2107                         if (isset($item[$field])) {
2108                                 $fields[$field] = $item[$field];
2109                         }
2110                 }
2111
2112                 if (empty($fields)) {
2113                         return;
2114                 }
2115
2116                 DBA::update('item-content', $fields, $condition, true);
2117                 Logger::info('Updated content', ['condition' => $condition]);
2118         }
2119
2120         /**
2121          * Distributes public items to the receivers
2122          *
2123          * @param integer $itemid      Item ID that should be added
2124          * @param string  $signed_text Original text (for Diaspora signatures), JSON encoded.
2125          * @throws \Exception
2126          */
2127         public static function distribute($itemid, $signed_text = '')
2128         {
2129                 $condition = ["`id` IN (SELECT `parent` FROM `item` WHERE `id` = ?)", $itemid];
2130                 $parent = self::selectFirst(['owner-id'], $condition);
2131                 if (!DBA::isResult($parent)) {
2132                         return;
2133                 }
2134
2135                 // Only distribute public items from native networks
2136                 $condition = ['id' => $itemid, 'uid' => 0,
2137                         'network' => array_merge(Protocol::FEDERATED ,['']),
2138                         'visible' => true, 'deleted' => false, 'moderated' => false, 'private' => [self::PUBLIC, self::UNLISTED]];
2139                 $item = self::selectFirst(self::ITEM_FIELDLIST, $condition);
2140                 if (!DBA::isResult($item)) {
2141                         return;
2142                 }
2143
2144                 $origin = $item['origin'];
2145
2146                 $users = [];
2147
2148                 /// @todo add a field "pcid" in the contact table that referrs to the public contact id.
2149                 $owner = DBA::selectFirst('contact', ['url', 'nurl', 'alias'], ['id' => $parent['owner-id']]);
2150                 if (!DBA::isResult($owner)) {
2151                         return;
2152                 }
2153
2154                 $condition = ['nurl' => $owner['nurl'], 'rel' => [Contact::SHARING, Contact::FRIEND]];
2155                 $contacts = DBA::select('contact', ['uid'], $condition);
2156                 while ($contact = DBA::fetch($contacts)) {
2157                         if ($contact['uid'] == 0) {
2158                                 continue;
2159                         }
2160
2161                         $users[$contact['uid']] = $contact['uid'];
2162                 }
2163                 DBA::close($contacts);
2164
2165                 $condition = ['alias' => $owner['url'], 'rel' => [Contact::SHARING, Contact::FRIEND]];
2166                 $contacts = DBA::select('contact', ['uid'], $condition);
2167                 while ($contact = DBA::fetch($contacts)) {
2168                         if ($contact['uid'] == 0) {
2169                                 continue;
2170                         }
2171
2172                         $users[$contact['uid']] = $contact['uid'];
2173                 }
2174                 DBA::close($contacts);
2175
2176                 if (!empty($owner['alias'])) {
2177                         $condition = ['nurl' => Strings::normaliseLink($owner['alias']), 'rel' => [Contact::SHARING, Contact::FRIEND]];
2178                         $contacts = DBA::select('contact', ['uid'], $condition);
2179                         while ($contact = DBA::fetch($contacts)) {
2180                                 if ($contact['uid'] == 0) {
2181                                         continue;
2182                                 }
2183
2184                                 $users[$contact['uid']] = $contact['uid'];
2185                         }
2186                         DBA::close($contacts);
2187                 }
2188
2189                 $origin_uid = 0;
2190
2191                 if ($item['uri'] != $item['parent-uri']) {
2192                         $parents = self::select(['uid', 'origin'], ["`uri` = ? AND `uid` != 0", $item['parent-uri']]);
2193                         while ($parent = self::fetch($parents)) {
2194                                 $users[$parent['uid']] = $parent['uid'];
2195                                 if ($parent['origin'] && !$origin) {
2196                                         $origin_uid = $parent['uid'];
2197                                 }
2198                         }
2199                 }
2200
2201                 foreach ($users as $uid) {
2202                         if ($origin_uid == $uid) {
2203                                 $item['diaspora_signed_text'] = $signed_text;
2204                         }
2205                         self::storeForUser($item, $uid);
2206                 }
2207         }
2208
2209         /**
2210          * Store a public item defined by their URI-ID for the given users
2211          *
2212          * @param integer $uri_id URI-ID of the given item
2213          * @param integer $uid    The user that will receive the item entry
2214          * @return integer stored item id
2215          */
2216         public static function storeForUserByUriId(int $uri_id, int $uid)
2217         {
2218                 $item = self::selectFirst(self::ITEM_FIELDLIST, ['uri-id' => $uri_id, 'uid' => 0]);
2219                 if (!DBA::isResult($item)) {
2220                         return 0;
2221                 }
2222
2223                 if (($item['private'] == self::PRIVATE) || !in_array($item['network'], Protocol::FEDERATED)) {
2224                         Logger::notice('Item is private or not from a federated network. It will not be stored for the user.', ['uri-id' => $uri_id, 'uid' => $uid, 'private' => $item['private'], 'network' => $item['network']]);
2225                         return 0;
2226                 }
2227
2228                 $stored = self::storeForUser($item, $uid);
2229                 Logger::info('Public item stored for user', ['uri-id' => $item['uri-id'], 'uid' => $uid, 'stored' => $stored]);
2230                 return $stored;
2231         }
2232
2233         /**
2234          * Store a public item array for the given users
2235          *
2236          * @param array   $item   The item entry that will be stored
2237          * @param integer $uid    The user that will receive the item entry
2238          * @return integer stored item id
2239          * @throws \Exception
2240          */
2241         private static function storeForUser(array $item, int $uid)
2242         {
2243                 if (self::exists(['uri-id' => $item['uri-id'], 'uid' => $uid])) {
2244                         Logger::info('Item already exists', ['uri-id' => $item['uri-id'], 'uid' => $uid]);
2245                         return 0;
2246                 }
2247
2248                 unset($item['id']);
2249                 unset($item['parent']);
2250                 unset($item['mention']);
2251                 unset($item['starred']);
2252                 unset($item['unseen']);
2253                 unset($item['psid']);
2254
2255                 $item['uid'] = $uid;
2256                 $item['origin'] = 0;
2257                 $item['wall'] = 0;
2258
2259                 if ($item['gravity'] == GRAVITY_PARENT) {
2260                         $contact = Contact::getByURLForUser($item['owner-link'], $uid, false, ['id']);
2261                 } else {
2262                         $contact = Contact::getByURLForUser($item['author-link'], $uid, false, ['id']);
2263                 }
2264
2265                 if (!empty($contact['id'])) {
2266                         $item['contact-id'] = $contact['id'];
2267                 } else {
2268                         // Shouldn't happen at all
2269                         Logger::warning('contact-id could not be fetched', ['uid' => $uid, 'item' => $item]);
2270                         $self = DBA::selectFirst('contact', ['id'], ['self' => true, 'uid' => $uid]);
2271                         if (!DBA::isResult($self)) {
2272                                 // Shouldn't happen even less
2273                                 Logger::warning('self contact could not be fetched', ['uid' => $uid, 'item' => $item]);
2274                                 return 0;
2275                         }
2276                         $item['contact-id'] = $self['id'];
2277                 }
2278
2279                 /// @todo Handling of "event-id"
2280
2281                 $notify = false;
2282                 if ($item['gravity'] == GRAVITY_PARENT) {
2283                         $contact = DBA::selectFirst('contact', [], ['id' => $item['contact-id'], 'self' => false]);
2284                         if (DBA::isResult($contact)) {
2285                                 $notify = self::isRemoteSelf($contact, $item);
2286                         }
2287                 }
2288
2289                 $distributed = self::insert($item, $notify, true);
2290
2291                 if (!$distributed) {
2292                         Logger::info("Distributed public item wasn't stored", ['uri-id' => $item['uri-id'], 'user' => $uid]);
2293                 } else {
2294                         Logger::info('Distributed public item was stored', ['uri-id' => $item['uri-id'], 'user' => $uid, 'stored' => $distributed]);
2295                 }
2296                 return $distributed;
2297         }
2298
2299         /**
2300          * Add a shadow entry for a given item id that is a thread starter
2301          *
2302          * We store every public item entry additionally with the user id "0".
2303          * This is used for the community page and for the search.
2304          * It is planned that in the future we will store public item entries only once.
2305          *
2306          * @param integer $itemid Item ID that should be added
2307          * @throws \Exception
2308          */
2309         public static function addShadow($itemid)
2310         {
2311                 $fields = ['uid', 'private', 'moderated', 'visible', 'deleted', 'network', 'uri'];
2312                 $condition = ['id' => $itemid, 'parent' => [0, $itemid]];
2313                 $item = self::selectFirst($fields, $condition);
2314
2315                 if (!DBA::isResult($item)) {
2316                         return;
2317                 }
2318
2319                 // is it already a copy?
2320                 if (($itemid == 0) || ($item['uid'] == 0)) {
2321                         return;
2322                 }
2323
2324                 // Is it a visible public post?
2325                 if (!$item["visible"] || $item["deleted"] || $item["moderated"] || ($item["private"] == Item::PRIVATE)) {
2326                         return;
2327                 }
2328
2329                 // is it an entry from a connector? Only add an entry for natively connected networks
2330                 if (!in_array($item["network"], array_merge(Protocol::FEDERATED ,['']))) {
2331                         return;
2332                 }
2333
2334                 if (self::exists(['uri' => $item['uri'], 'uid' => 0])) {
2335                         return;
2336                 }
2337
2338                 $item = self::selectFirst(self::ITEM_FIELDLIST, ['id' => $itemid]);
2339
2340                 if (DBA::isResult($item)) {
2341                         // Preparing public shadow (removing user specific data)
2342                         $item['uid'] = 0;
2343                         unset($item['id']);
2344                         unset($item['parent']);
2345                         unset($item['wall']);
2346                         unset($item['mention']);
2347                         unset($item['origin']);
2348                         unset($item['starred']);
2349                         unset($item['postopts']);
2350                         unset($item['inform']);
2351                         if ($item['uri'] == $item['parent-uri']) {
2352                                 $item['contact-id'] = $item['owner-id'];
2353                         } else {
2354                                 $item['contact-id'] = $item['author-id'];
2355                         }
2356
2357                         $public_shadow = self::insert($item, false, true);
2358
2359                         Logger::info('Stored public shadow', ['thread' => $itemid, 'id' => $public_shadow]);
2360                 }
2361         }
2362
2363         /**
2364          * Add a shadow entry for a given item id that is a comment
2365          *
2366          * This function does the same like the function above - but for comments
2367          *
2368          * @param integer $itemid Item ID that should be added
2369          * @throws \Exception
2370          */
2371         public static function addShadowPost($itemid)
2372         {
2373                 $item = self::selectFirst(self::ITEM_FIELDLIST, ['id' => $itemid]);
2374                 if (!DBA::isResult($item)) {
2375                         return;
2376                 }
2377
2378                 // Is it a toplevel post?
2379                 if ($item['gravity'] == GRAVITY_PARENT) {
2380                         self::addShadow($itemid);
2381                         return;
2382                 }
2383
2384                 // Is this a shadow entry?
2385                 if ($item['uid'] == 0) {
2386                         return;
2387                 }
2388
2389                 // Is there a shadow parent?
2390                 if (!self::exists(['uri' => $item['parent-uri'], 'uid' => 0])) {
2391                         return;
2392                 }
2393
2394                 // Is there already a shadow entry?
2395                 if (self::exists(['uri' => $item['uri'], 'uid' => 0])) {
2396                         return;
2397                 }
2398
2399                 // Save "origin" and "parent" state
2400                 $origin = $item['origin'];
2401                 $parent = $item['parent'];
2402
2403                 // Preparing public shadow (removing user specific data)
2404                 $item['uid'] = 0;
2405                 unset($item['id']);
2406                 unset($item['parent']);
2407                 unset($item['wall']);
2408                 unset($item['mention']);
2409                 unset($item['origin']);
2410                 unset($item['starred']);
2411                 unset($item['postopts']);
2412                 unset($item['inform']);
2413                 $item['contact-id'] = Contact::getIdForURL($item['author-link']);
2414
2415                 $public_shadow = self::insert($item, false, true);
2416
2417                 Logger::info('Stored public shadow', ['uri' => $item['uri'], 'id' => $public_shadow]);
2418
2419                 // If this was a comment to a Diaspora post we don't get our comment back.
2420                 // This means that we have to distribute the comment by ourselves.
2421                 if ($origin && self::exists(['id' => $parent, 'network' => Protocol::DIASPORA])) {
2422                         self::distribute($public_shadow);
2423                 }
2424         }
2425
2426         /**
2427          * Adds a language specification in a "language" element of given $arr.
2428          * Expects "body" element to exist in $arr.
2429          *
2430          * @param array $item
2431          * @return string detected language
2432          * @throws \Text_LanguageDetect_Exception
2433          */
2434         private static function getLanguage(array $item)
2435         {
2436                 $naked_body = BBCode::toPlaintext($item['body'], false);
2437
2438                 $ld = new Text_LanguageDetect();
2439                 $ld->setNameMode(2);
2440                 $languages = $ld->detect($naked_body, 3);
2441                 if (is_array($languages)) {
2442                         return json_encode($languages);
2443                 }
2444
2445                 return '';
2446         }
2447
2448         /**
2449          * Creates an unique guid out of a given uri
2450          *
2451          * @param string $uri uri of an item entry
2452          * @param string $host hostname for the GUID prefix
2453          * @return string unique guid
2454          */
2455         public static function guidFromUri($uri, $host)
2456         {
2457                 // Our regular guid routine is using this kind of prefix as well
2458                 // We have to avoid that different routines could accidentally create the same value
2459                 $parsed = parse_url($uri);
2460
2461                 // We use a hash of the hostname as prefix for the guid
2462                 $guid_prefix = hash("crc32", $host);
2463
2464                 // Remove the scheme to make sure that "https" and "http" doesn't make a difference
2465                 unset($parsed["scheme"]);
2466
2467                 // Glue it together to be able to make a hash from it
2468                 $host_id = implode("/", $parsed);
2469
2470                 // We could use any hash algorithm since it isn't a security issue
2471                 $host_hash = hash("ripemd128", $host_id);
2472
2473                 return $guid_prefix.$host_hash;
2474         }
2475
2476         /**
2477          * generate an unique URI
2478          *
2479          * @param integer $uid  User id
2480          * @param string  $guid An existing GUID (Otherwise it will be generated)
2481          *
2482          * @return string
2483          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
2484          */
2485         public static function newURI($uid, $guid = "")
2486         {
2487                 if ($guid == "") {
2488                         $guid = System::createUUID();
2489                 }
2490
2491                 return DI::baseUrl()->get() . '/objects/' . $guid;
2492         }
2493
2494         /**
2495          * Set "success_update" and "last-item" to the date of the last time we heard from this contact
2496          *
2497          * This can be used to filter for inactive contacts.
2498          * Only do this for public postings to avoid privacy problems, since poco data is public.
2499          * Don't set this value if it isn't from the owner (could be an author that we don't know)
2500          *
2501          * @param array $arr Contains the just posted item record
2502          * @throws \Exception
2503          */
2504         private static function updateContact($arr)
2505         {
2506                 // Unarchive the author
2507                 $contact = DBA::selectFirst('contact', [], ['id' => $arr["author-id"]]);
2508                 if (DBA::isResult($contact)) {
2509                         Contact::unmarkForArchival($contact);
2510                 }
2511
2512                 // Unarchive the contact if it's not our own contact
2513                 $contact = DBA::selectFirst('contact', [], ['id' => $arr["contact-id"], 'self' => false]);
2514                 if (DBA::isResult($contact)) {
2515                         Contact::unmarkForArchival($contact);
2516                 }
2517
2518                 /// @todo On private posts we could obfuscate the date
2519                 $update = ($arr['private'] != self::PRIVATE) || in_array($arr['network'], Protocol::FEDERATED);
2520
2521                 // Is it a forum? Then we don't care about the rules from above
2522                 if (!$update && in_array($arr["network"], [Protocol::ACTIVITYPUB, Protocol::DFRN]) && ($arr["parent-uri"] === $arr["uri"])) {
2523                         if (DBA::exists('contact', ['id' => $arr['contact-id'], 'forum' => true])) {
2524                                 $update = true;
2525                         }
2526                 }
2527
2528                 if ($update) {
2529                         // The "self" contact id is used (for example in the connectors) when the contact is unknown
2530                         // So we have to ensure to only update the last item when it had been our own post,
2531                         // or it had been done by a "regular" contact.
2532                         if (!empty($arr['wall'])) {
2533                                 $condition = ['id' => $arr['contact-id']];
2534                         } else {
2535                                 $condition = ['id' => $arr['contact-id'], 'self' => false];
2536                         }
2537                         DBA::update('contact', ['failed' => false, 'success_update' => $arr['received'], 'last-item' => $arr['received']], $condition);
2538                 }
2539                 // Now do the same for the system wide contacts with uid=0
2540                 if ($arr['private'] != self::PRIVATE) {
2541                         DBA::update('contact', ['failed' => false, 'success_update' => $arr['received'], 'last-item' => $arr['received']],
2542                                 ['id' => $arr['owner-id']]);
2543
2544                         if ($arr['owner-id'] != $arr['author-id']) {
2545                                 DBA::update('contact', ['failed' => false, 'success_update' => $arr['received'], 'last-item' => $arr['received']],
2546                                         ['id' => $arr['author-id']]);
2547                         }
2548                 }
2549         }
2550
2551         public static function setHashtags($body)
2552         {
2553                 $body = BBCode::performWithEscapedTags($body, ['noparse', 'pre', 'code'], function ($body) {
2554                         $tags = BBCode::getTags($body);
2555
2556                         // No hashtags?
2557                         if (!count($tags)) {
2558                                 return $body;
2559                         }
2560
2561                         // This sorting is important when there are hashtags that are part of other hashtags
2562                         // Otherwise there could be problems with hashtags like #test and #test2
2563                         // Because of this we are sorting from the longest to the shortest tag.
2564                         usort($tags, function ($a, $b) {
2565                                 return strlen($b) <=> strlen($a);
2566                         });
2567
2568                         $URLSearchString = "^\[\]";
2569
2570                         // All hashtags should point to the home server if "local_tags" is activated
2571                         if (DI::config()->get('system', 'local_tags')) {
2572                                 $body = preg_replace("/#\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",
2573                                         "#[url=" . DI::baseUrl() . "/search?tag=$2]$2[/url]", $body);
2574                         }
2575
2576                         // mask hashtags inside of url, bookmarks and attachments to avoid urls in urls
2577                         $body = preg_replace_callback("/\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",
2578                                 function ($match) {
2579                                         return ("[url=" . str_replace("#", "&num;", $match[1]) . "]" . str_replace("#", "&num;", $match[2]) . "[/url]");
2580                                 }, $body);
2581
2582                         $body = preg_replace_callback("/\[bookmark\=([$URLSearchString]*)\](.*?)\[\/bookmark\]/ism",
2583                                 function ($match) {
2584                                         return ("[bookmark=" . str_replace("#", "&num;", $match[1]) . "]" . str_replace("#", "&num;", $match[2]) . "[/bookmark]");
2585                                 }, $body);
2586
2587                         $body = preg_replace_callback("/\[attachment (.*)\](.*?)\[\/attachment\]/ism",
2588                                 function ($match) {
2589                                         return ("[attachment " . str_replace("#", "&num;", $match[1]) . "]" . $match[2] . "[/attachment]");
2590                                 }, $body);
2591
2592                         // Repair recursive urls
2593                         $body = preg_replace("/&num;\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",
2594                                 "&num;$2", $body);
2595
2596                         foreach ($tags as $tag) {
2597                                 if ((strpos($tag, '#') !== 0) || strpos($tag, '[url=') || strlen($tag) < 2 || $tag[1] == '#') {
2598                                         continue;
2599                                 }
2600
2601                                 $basetag = str_replace('_', ' ', substr($tag, 1));
2602                                 $newtag = '#[url=' . DI::baseUrl() . '/search?tag=' . $basetag . ']' . $basetag . '[/url]';
2603
2604                                 $body = str_replace($tag, $newtag, $body);
2605                         }
2606
2607                         // Convert back the masked hashtags
2608                         $body = str_replace("&num;", "#", $body);
2609
2610                         return $body;
2611                 });
2612
2613                 return $body;
2614         }
2615
2616         /**
2617          * look for mention tags and setup a second delivery chain for forum/community posts if appropriate
2618          *
2619          * @param int $uid
2620          * @param int $item_id
2621          * @return boolean true if item was deleted, else false
2622          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
2623          * @throws \ImagickException
2624          */
2625         private static function tagDeliver($uid, $item_id)
2626         {
2627                 $mention = false;
2628
2629                 $user = DBA::selectFirst('user', [], ['uid' => $uid]);
2630                 if (!DBA::isResult($user)) {
2631                         return false;
2632                 }
2633
2634                 $community_page = (($user['page-flags'] == User::PAGE_FLAGS_COMMUNITY) ? true : false);
2635                 $prvgroup = (($user['page-flags'] == User::PAGE_FLAGS_PRVGROUP) ? true : false);
2636
2637                 $item = self::selectFirst(self::ITEM_FIELDLIST, ['id' => $item_id]);
2638                 if (!DBA::isResult($item)) {
2639                         return false;
2640                 }
2641
2642                 $link = Strings::normaliseLink(DI::baseUrl() . '/profile/' . $user['nickname']);
2643
2644                 /*
2645                  * Diaspora uses their own hardwired link URL in @-tags
2646                  * instead of the one we supply with webfinger
2647                  */
2648                 $dlink = Strings::normaliseLink(DI::baseUrl() . '/u/' . $user['nickname']);
2649
2650                 $cnt = preg_match_all('/[\@\!]\[url\=(.*?)\](.*?)\[\/url\]/ism', $item['body'], $matches, PREG_SET_ORDER);
2651                 if ($cnt) {
2652                         foreach ($matches as $mtch) {
2653                                 if (Strings::compareLink($link, $mtch[1]) || Strings::compareLink($dlink, $mtch[1])) {
2654                                         $mention = true;
2655                                         Logger::log('mention found: ' . $mtch[2]);
2656                                 }
2657                         }
2658                 }
2659
2660                 if (!$mention) {
2661                         if (($community_page || $prvgroup) &&
2662                                   !$item['wall'] && !$item['origin'] && ($item['gravity'] == GRAVITY_PARENT)) {
2663                                 Logger::info('Delete private group/communiy top-level item without mention', ['id' => $item_id, 'guid'=> $item['guid']]);
2664                                 DBA::delete('item', ['id' => $item_id]);
2665                                 return true;
2666                         }
2667                         return false;
2668                 }
2669
2670                 $arr = ['item' => $item, 'user' => $user];
2671
2672                 Hook::callAll('tagged', $arr);
2673
2674                 if (!$community_page && !$prvgroup) {
2675                         return false;
2676                 }
2677
2678                 /*
2679                  * tgroup delivery - setup a second delivery chain
2680                  * prevent delivery looping - only proceed
2681                  * if the message originated elsewhere and is a top-level post
2682                  */
2683                 if ($item['wall'] || $item['origin'] || ($item['id'] != $item['parent'])) {
2684                         return false;
2685                 }
2686
2687                 // now change this copy of the post to a forum head message and deliver to all the tgroup members
2688                 $self = DBA::selectFirst('contact', ['id', 'name', 'url', 'thumb'], ['uid' => $uid, 'self' => true]);
2689                 if (!DBA::isResult($self)) {
2690                         return false;
2691                 }
2692
2693                 $owner_id = Contact::getIdForURL($self['url']);
2694
2695                 // also reset all the privacy bits to the forum default permissions
2696
2697                 $private = ($user['allow_cid'] || $user['allow_gid'] || $user['deny_cid'] || $user['deny_gid']) ? self::PRIVATE : self::PUBLIC;
2698
2699                 $psid = PermissionSet::getIdFromACL(
2700                         $user['uid'],
2701                         $user['allow_cid'],
2702                         $user['allow_gid'],
2703                         $user['deny_cid'],
2704                         $user['deny_gid']
2705                 );
2706
2707                 $forum_mode = ($prvgroup ? 2 : 1);
2708
2709                 $fields = ['wall' => true, 'origin' => true, 'forum_mode' => $forum_mode, 'contact-id' => $self['id'],
2710                         'owner-id' => $owner_id, 'private' => $private, 'psid' => $psid];
2711                 self::update($fields, ['id' => $item_id]);
2712
2713                 self::updateThread($item_id);
2714
2715                 Worker::add(['priority' => PRIORITY_HIGH, 'dont_fork' => true], 'Notifier', Delivery::POST, $item_id);
2716
2717                 /// @todo This code should be activated by the end of the year 2020
2718                 // See also "createActivityFromItem"
2719                 //Item::performActivity($item_id, 'announce', $uid);
2720
2721                 return false;
2722         }
2723
2724         public static function isRemoteSelf($contact, &$datarray)
2725         {
2726                 if (!$contact['remote_self']) {
2727                         return false;
2728                 }
2729
2730                 // Prevent the forwarding of posts that are forwarded
2731                 if (!empty($datarray["extid"]) && ($datarray["extid"] == Protocol::DFRN)) {
2732                         Logger::info('Already forwarded');
2733                         return false;
2734                 }
2735
2736                 // Prevent to forward already forwarded posts
2737                 if ($datarray["app"] == DI::baseUrl()->getHostname()) {
2738                         Logger::info('Already forwarded (second test)');
2739                         return false;
2740                 }
2741
2742                 // Only forward posts
2743                 if ($datarray["verb"] != Activity::POST) {
2744                         Logger::info('No post');
2745                         return false;
2746                 }
2747
2748                 if (($contact['network'] != Protocol::FEED) && ($datarray['private'] == self::PRIVATE)) {
2749                         Logger::info('Not public');
2750                         return false;
2751                 }
2752
2753                 $datarray2 = $datarray;
2754                 Logger::info('remote-self start', ['contact' => $contact['url'], 'remote_self'=> $contact['remote_self'], 'item' => $datarray]);
2755                 if ($contact['remote_self'] == 2) {
2756                         $self = DBA::selectFirst('contact', ['id', 'name', 'url', 'thumb'],
2757                                         ['uid' => $contact['uid'], 'self' => true]);
2758                         if (DBA::isResult($self)) {
2759                                 $datarray['contact-id'] = $self["id"];
2760
2761                                 $datarray['owner-name'] = $self["name"];
2762                                 $datarray['owner-link'] = $self["url"];
2763                                 $datarray['owner-avatar'] = $self["thumb"];
2764
2765                                 $datarray['author-name']   = $datarray['owner-name'];
2766                                 $datarray['author-link']   = $datarray['owner-link'];
2767                                 $datarray['author-avatar'] = $datarray['owner-avatar'];
2768
2769                                 unset($datarray['edited']);
2770
2771                                 unset($datarray['network']);
2772                                 unset($datarray['owner-id']);
2773                                 unset($datarray['author-id']);
2774                         }
2775
2776                         if ($contact['network'] != Protocol::FEED) {
2777                                 $datarray["guid"] = System::createUUID();
2778                                 unset($datarray["plink"]);
2779                                 $datarray["uri"] = self::newURI($contact['uid'], $datarray["guid"]);
2780                                 $datarray["parent-uri"] = $datarray["uri"];
2781                                 $datarray["thr-parent"] = $datarray["uri"];
2782                                 $datarray["extid"] = Protocol::DFRN;
2783                                 $urlpart = parse_url($datarray2['author-link']);
2784                                 $datarray["app"] = $urlpart["host"];
2785                         } else {
2786                                 $datarray['private'] = self::PUBLIC;
2787                         }
2788                 }
2789
2790                 if ($contact['network'] != Protocol::FEED) {
2791                         // Store the original post
2792                         $result = self::insert($datarray2);
2793                         Logger::info('remote-self post original item', ['contact' => $contact['url'], 'result'=> $result, 'item' => $datarray2]);
2794                 } else {
2795                         $datarray["app"] = "Feed";
2796                         $result = true;
2797                 }
2798
2799                 // Trigger automatic reactions for addons
2800                 $datarray['api_source'] = true;
2801
2802                 // We have to tell the hooks who we are - this really should be improved
2803                 $_SESSION["authenticated"] = true;
2804                 $_SESSION["uid"] = $contact['uid'];
2805
2806                 return $result;
2807         }
2808
2809         /**
2810          *
2811          * @param string $s
2812          * @param int    $uid
2813          * @param array  $item
2814          * @param int    $cid
2815          * @return string
2816          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
2817          * @throws \ImagickException
2818          */
2819         public static function fixPrivatePhotos($s, $uid, $item = null, $cid = 0)
2820         {
2821                 if (DI::config()->get('system', 'disable_embedded')) {
2822                         return $s;
2823                 }
2824
2825                 Logger::info('check for photos');
2826                 $site = substr(DI::baseUrl(), strpos(DI::baseUrl(), '://'));
2827
2828                 $orig_body = $s;
2829                 $new_body = '';
2830
2831                 $img_start = strpos($orig_body, '[img');
2832                 $img_st_close = ($img_start !== false ? strpos(substr($orig_body, $img_start), ']') : false);
2833                 $img_len = ($img_start !== false ? strpos(substr($orig_body, $img_start + $img_st_close + 1), '[/img]') : false);
2834
2835                 while (($img_st_close !== false) && ($img_len !== false)) {
2836                         $img_st_close++; // make it point to AFTER the closing bracket
2837                         $image = substr($orig_body, $img_start + $img_st_close, $img_len);
2838
2839                         Logger::info('found photo', ['image' => $image]);
2840
2841                         if (stristr($image, $site . '/photo/')) {
2842                                 // Only embed locally hosted photos
2843                                 $replace = false;
2844                                 $i = basename($image);
2845                                 $i = str_replace(['.jpg', '.png', '.gif'], ['', '', ''], $i);
2846                                 $x = strpos($i, '-');
2847
2848                                 if ($x) {
2849                                         $res = substr($i, $x + 1);
2850                                         $i = substr($i, 0, $x);
2851                                         $photo = Photo::getPhotoForUser($uid, $i, $res);
2852                                         if (DBA::isResult($photo)) {
2853                                                 /*
2854                                                  * Check to see if we should replace this photo link with an embedded image
2855                                                  * 1. No need to do so if the photo is public
2856                                                  * 2. If there's a contact-id provided, see if they're in the access list
2857                                                  *    for the photo. If so, embed it.
2858                                                  * 3. Otherwise, if we have an item, see if the item permissions match the photo
2859                                                  *    permissions, regardless of order but first check to see if they're an exact
2860                                                  *    match to save some processing overhead.
2861                                                  */
2862                                                 if (self::hasPermissions($photo)) {
2863                                                         if ($cid) {
2864                                                                 $recips = self::enumeratePermissions($photo);
2865                                                                 if (in_array($cid, $recips)) {
2866                                                                         $replace = true;
2867                                                                 }
2868                                                         } elseif ($item) {
2869                                                                 if (self::samePermissions($uid, $item, $photo)) {
2870                                                                         $replace = true;
2871                                                                 }
2872                                                         }
2873                                                 }
2874                                                 if ($replace) {
2875                                                         $photo_img = Photo::getImageForPhoto($photo);
2876                                                         // If a custom width and height were specified, apply before embedding
2877                                                         if (preg_match("/\[img\=([0-9]*)x([0-9]*)\]/is", substr($orig_body, $img_start, $img_st_close), $match)) {
2878                                                                 Logger::info('scaling photo');
2879
2880                                                                 $width = intval($match[1]);
2881                                                                 $height = intval($match[2]);
2882
2883                                                                 $photo_img->scaleDown(max($width, $height));
2884                                                         }
2885
2886                                                         $data = $photo_img->asString();
2887                                                         $type = $photo_img->getType();
2888
2889                                                         Logger::info('replacing photo');
2890                                                         $image = 'data:' . $type . ';base64,' . base64_encode($data);
2891                                                         Logger::debug('replaced', ['image' => $image]);
2892                                                 }
2893                                         }
2894                                 }
2895                         }
2896
2897                         $new_body = $new_body . substr($orig_body, 0, $img_start + $img_st_close) . $image . '[/img]';
2898                         $orig_body = substr($orig_body, $img_start + $img_st_close + $img_len + strlen('[/img]'));
2899                         if ($orig_body === false) {
2900                                 $orig_body = '';
2901                         }
2902
2903                         $img_start = strpos($orig_body, '[img');
2904                         $img_st_close = ($img_start !== false ? strpos(substr($orig_body, $img_start), ']') : false);
2905                         $img_len = ($img_start !== false ? strpos(substr($orig_body, $img_start + $img_st_close + 1), '[/img]') : false);
2906                 }
2907
2908                 $new_body = $new_body . $orig_body;
2909
2910                 return $new_body;
2911         }
2912
2913         private static function hasPermissions($obj)
2914         {
2915                 return !empty($obj['allow_cid']) || !empty($obj['allow_gid']) ||
2916                         !empty($obj['deny_cid']) || !empty($obj['deny_gid']);
2917         }
2918
2919         private static function samePermissions($uid, $obj1, $obj2)
2920         {
2921                 // first part is easy. Check that these are exactly the same.
2922                 if (($obj1['allow_cid'] == $obj2['allow_cid'])
2923                         && ($obj1['allow_gid'] == $obj2['allow_gid'])
2924                         && ($obj1['deny_cid'] == $obj2['deny_cid'])
2925                         && ($obj1['deny_gid'] == $obj2['deny_gid'])) {
2926                         return true;
2927                 }
2928
2929                 // This is harder. Parse all the permissions and compare the resulting set.
2930                 $recipients1 = self::enumeratePermissions($obj1);
2931                 $recipients2 = self::enumeratePermissions($obj2);
2932                 sort($recipients1);
2933                 sort($recipients2);
2934
2935                 /// @TODO Comparison of arrays, maybe use array_diff_assoc() here?
2936                 return ($recipients1 == $recipients2);
2937         }
2938
2939         /**
2940          * Returns an array of contact-ids that are allowed to see this object
2941          *
2942          * @param array $obj        Item array with at least uid, allow_cid, allow_gid, deny_cid and deny_gid
2943          * @param bool  $check_dead Prunes unavailable contacts from the result
2944          * @return array
2945          * @throws \Exception
2946          */
2947         public static function enumeratePermissions(array $obj, bool $check_dead = false)
2948         {
2949                 $aclFormater = DI::aclFormatter();
2950
2951                 $allow_people = $aclFormater->expand($obj['allow_cid']);
2952                 $allow_groups = Group::expand($obj['uid'], $aclFormater->expand($obj['allow_gid']), $check_dead);
2953                 $deny_people  = $aclFormater->expand($obj['deny_cid']);
2954                 $deny_groups  = Group::expand($obj['uid'], $aclFormater->expand($obj['deny_gid']), $check_dead);
2955                 $recipients   = array_unique(array_merge($allow_people, $allow_groups));
2956                 $deny         = array_unique(array_merge($deny_people, $deny_groups));
2957                 $recipients   = array_diff($recipients, $deny);
2958                 return $recipients;
2959         }
2960
2961         public static function expire($uid, $days, $network = "", $force = false)
2962         {
2963                 if (!$uid || ($days < 1)) {
2964                         return;
2965                 }
2966
2967                 $condition = ["`uid` = ? AND NOT `deleted` AND `gravity` = ?",
2968                         $uid, GRAVITY_PARENT];
2969
2970                 /*
2971                  * $expire_network_only = save your own wall posts
2972                  * and just expire conversations started by others
2973                  */
2974                 $expire_network_only = DI::pConfig()->get($uid, 'expire', 'network_only', false);
2975
2976                 if ($expire_network_only) {
2977                         $condition[0] .= " AND NOT `wall`";
2978                 }
2979
2980                 if ($network != "") {
2981                         $condition[0] .= " AND `network` = ?";
2982                         $condition[] = $network;
2983                 }
2984
2985                 $condition[0] .= " AND `received` < UTC_TIMESTAMP() - INTERVAL ? DAY";
2986                 $condition[] = $days;
2987
2988                 $items = self::select(['file', 'resource-id', 'starred', 'type', 'id', 'post-type'], $condition);
2989
2990                 if (!DBA::isResult($items)) {
2991                         return;
2992                 }
2993
2994                 $expire_items = DI::pConfig()->get($uid, 'expire', 'items', true);
2995
2996                 // Forcing expiring of items - but not notes and marked items
2997                 if ($force) {
2998                         $expire_items = true;
2999                 }
3000
3001                 $expire_notes = DI::pConfig()->get($uid, 'expire', 'notes', true);
3002                 $expire_starred = DI::pConfig()->get($uid, 'expire', 'starred', true);
3003                 $expire_photos = DI::pConfig()->get($uid, 'expire', 'photos', false);
3004
3005                 $expired = 0;
3006
3007                 while ($item = Item::fetch($items)) {
3008                         // don't expire filed items
3009
3010                         if (strpos($item['file'], '[') !== false) {
3011                                 continue;
3012                         }
3013
3014                         // Only expire posts, not photos and photo comments
3015
3016                         if (!$expire_photos && strlen($item['resource-id'])) {
3017                                 continue;
3018                         } elseif (!$expire_starred && intval($item['starred'])) {
3019                                 continue;
3020                         } elseif (!$expire_notes && (($item['type'] == 'note') || ($item['post-type'] == Item::PT_PERSONAL_NOTE))) {
3021                                 continue;
3022                         } elseif (!$expire_items && ($item['type'] != 'note') && ($item['post-type'] != Item::PT_PERSONAL_NOTE)) {
3023                                 continue;
3024                         }
3025
3026                         self::markForDeletionById($item['id'], PRIORITY_LOW);
3027
3028                         ++$expired;
3029                 }
3030                 DBA::close($items);
3031                 Logger::log('User ' . $uid . ": expired $expired items; expire items: $expire_items, expire notes: $expire_notes, expire starred: $expire_starred, expire photos: $expire_photos");
3032         }
3033
3034         public static function firstPostDate($uid, $wall = false)
3035         {
3036                 $condition = ['uid' => $uid, 'wall' => $wall, 'deleted' => false, 'visible' => true, 'moderated' => false];
3037                 $params = ['order' => ['received' => false]];
3038                 $thread = DBA::selectFirst('thread', ['received'], $condition, $params);
3039                 if (DBA::isResult($thread)) {
3040                         return substr(DateTimeFormat::local($thread['received']), 0, 10);
3041                 }
3042                 return false;
3043         }
3044
3045         /**
3046          * add/remove activity to an item
3047          *
3048          * Toggle activities as like,dislike,attend of an item
3049          *
3050          * @param int $item_id
3051          * @param string $verb
3052          *            Activity verb. One of
3053          *            like, unlike, dislike, undislike, attendyes, unattendyes,
3054          *            attendno, unattendno, attendmaybe, unattendmaybe,
3055          *            announce, unannouce
3056          * @return bool
3057          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
3058          * @throws \ImagickException
3059          * @hook  'post_local_end'
3060          *            array $arr
3061          *            'post_id' => ID of posted item
3062          */
3063         public static function performActivity(int $item_id, string $verb, int $uid)
3064         {
3065                 if (empty($uid)) {
3066                         return false;
3067                 }
3068
3069                 Logger::notice('Start create activity', ['verb' => $verb, 'item' => $item_id, 'user' => $uid]);
3070
3071                 $item = self::selectFirst(self::ITEM_FIELDLIST, ['id' => $item_id]);
3072                 if (!DBA::isResult($item)) {
3073                         Logger::log('like: unknown item ' . $item_id);
3074                         return false;
3075                 }
3076
3077                 $item_uri = $item['uri'];
3078
3079                 if (!in_array($item['uid'], [0, $uid])) {
3080                         return false;
3081                 }
3082
3083                 if (!Item::exists(['uri-id' => $item['parent-uri-id'], 'uid' => $uid])) {
3084                         $stored = self::storeForUserByUriId($item['parent-uri-id'], $uid);
3085                         if (($item['parent-uri-id'] == $item['uri-id']) && !empty($stored)) {
3086                                 $item = self::selectFirst(self::ITEM_FIELDLIST, ['id' => $stored]);
3087                                 if (!DBA::isResult($item)) {
3088                                         Logger::info('Could not fetch just created item - should not happen', ['stored' => $stored, 'uid' => $uid, 'item-uri' => $item_uri]);
3089                                         return false;
3090                                 }
3091                         }
3092                 }
3093
3094                 // Retrieves the local post owner
3095                 $owner = User::getOwnerDataById($uid);
3096                 if (empty($owner)) {
3097                         Logger::info('Empty owner for user', ['uid' => $uid]);
3098                         return false;
3099                 }
3100
3101                 // Retrieve the current logged in user's public contact
3102                 $author_id = Contact::getIdForURL($owner['url']);
3103                 if (empty($author_id)) {
3104                         Logger::info('Empty public contact');
3105                         return false;
3106                 }
3107
3108                 $activity = null;
3109                 switch ($verb) {
3110                         case 'like':
3111                         case 'unlike':
3112                                 $activity = Activity::LIKE;
3113                                 break;
3114                         case 'dislike':
3115                         case 'undislike':
3116                                 $activity = Activity::DISLIKE;
3117                                 break;
3118                         case 'attendyes':
3119                         case 'unattendyes':
3120                                 $activity = Activity::ATTEND;
3121                                 break;
3122                         case 'attendno':
3123                         case 'unattendno':
3124                                 $activity = Activity::ATTENDNO;
3125                                 break;
3126                         case 'attendmaybe':
3127                         case 'unattendmaybe':
3128                                 $activity = Activity::ATTENDMAYBE;
3129                                 break;
3130                         case 'follow':
3131                         case 'unfollow':
3132                                 $activity = Activity::FOLLOW;
3133                                 break;
3134                         case 'announce':
3135                         case 'unannounce':
3136                                 $activity = Activity::ANNOUNCE;
3137                                 break;
3138                         default:
3139                                 Logger::notice('unknown verb', ['verb' => $verb, 'item' => $item_id]);
3140                                 return false;
3141                 }
3142
3143                 $mode = Strings::startsWith($verb, 'un') ? 'delete' : 'create';
3144
3145                 // Enable activity toggling instead of on/off
3146                 $event_verb_flag = $activity === Activity::ATTEND || $activity === Activity::ATTENDNO || $activity === Activity::ATTENDMAYBE;
3147
3148                 // Look for an existing verb row
3149                 // Event participation activities are mutually exclusive, only one of them can exist at all times.
3150                 if ($event_verb_flag) {
3151                         $verbs = [Activity::ATTEND, Activity::ATTENDNO, Activity::ATTENDMAYBE];
3152
3153                         // Translate to the index based activity index
3154                         $vids = [];
3155                         foreach ($verbs as $verb) {
3156                                 $vids[] = Verb::getID($verb);
3157                         }
3158                 } else {
3159                         $vids = Verb::getID($activity);
3160                 }
3161
3162                 $condition = ['vid' => $vids, 'deleted' => false, 'gravity' => GRAVITY_ACTIVITY,
3163                         'author-id' => $author_id, 'uid' => $item['uid'], 'thr-parent' => $item_uri];
3164                 $like_item = self::selectFirst(['id', 'guid', 'verb'], $condition);
3165
3166                 if (DBA::isResult($like_item)) {
3167                         /**
3168                          * Truth table for existing activities
3169                          *
3170                          * |          Inputs            ||      Outputs      |
3171                          * |----------------------------||-------------------|
3172                          * |  Mode  | Event | Same verb || Delete? | Return? |
3173                          * |--------|-------|-----------||---------|---------|
3174                          * | create |  Yes  |    Yes    ||   No    |   Yes   |
3175                          * | create |  Yes  |    No     ||   Yes   |   No    |
3176                          * | create |  No   |    Yes    ||   No    |   Yes   |
3177                          * | create |  No   |    No     ||        N/A†       |
3178                          * | delete |  Yes  |    Yes    ||   Yes   |   N/A‡  |
3179                          * | delete |  Yes  |    No     ||   No    |   N/A‡  |
3180                          * | delete |  No   |    Yes    ||   Yes   |   N/A‡  |
3181                          * | delete |  No   |    No     ||        N/A†       |
3182                          * |--------|-------|-----------||---------|---------|
3183                          * |   A    |   B   |     C     || A xor C | !B or C |
3184                          *
3185                          * † Can't happen: It's impossible to find an existing non-event activity without
3186                          *                 the same verb because we are only looking for this single verb.
3187                          *
3188                          * ‡ The "mode = delete" is returning early whether an existing activity was found or not.
3189                          */
3190                         if ($mode == 'create' xor $like_item['verb'] == $activity) {
3191                                 self::markForDeletionById($like_item['id']);
3192                         }
3193
3194                         if (!$event_verb_flag || $like_item['verb'] == $activity) {
3195                                 return true;
3196                         }
3197                 }
3198
3199                 // No need to go further if we aren't creating anything
3200                 if ($mode == 'delete') {
3201                         return true;
3202                 }
3203
3204                 $objtype = $item['resource-id'] ? Activity\ObjectType::IMAGE : Activity\ObjectType::NOTE;
3205
3206                 $new_item = [
3207                         'guid'          => System::createUUID(),
3208                         'uri'           => self::newURI($item['uid']),
3209                         'uid'           => $item['uid'],
3210                         'contact-id'    => $owner['id'],
3211                         'wall'          => $item['wall'],
3212                         'origin'        => 1,
3213                         'network'       => Protocol::DFRN,
3214                         'gravity'       => GRAVITY_ACTIVITY,
3215                         'parent'        => $item['id'],
3216                         'parent-uri'    => $item['uri'],
3217                         'thr-parent'    => $item['uri'],
3218                         'owner-id'      => $author_id,
3219                         'author-id'     => $author_id,
3220                         'body'          => $activity,
3221                         'verb'          => $activity,
3222                         'object-type'   => $objtype,
3223                         'allow_cid'     => $item['allow_cid'],
3224                         'allow_gid'     => $item['allow_gid'],
3225                         'deny_cid'      => $item['deny_cid'],
3226                         'deny_gid'      => $item['deny_gid'],
3227                         'visible'       => 1,
3228                         'unseen'        => 1,
3229                 ];
3230
3231                 $signed = Diaspora::createLikeSignature($uid, $new_item);
3232                 if (!empty($signed)) {
3233                         $new_item['diaspora_signed_text'] = json_encode($signed);
3234                 }
3235
3236                 $new_item_id = self::insert($new_item);
3237
3238                 // If the parent item isn't visible then set it to visible
3239                 if (!$item['visible']) {
3240                         self::update(['visible' => true], ['id' => $item['id']]);
3241                 }
3242
3243                 $new_item['id'] = $new_item_id;
3244
3245                 Hook::callAll('post_local_end', $new_item);
3246
3247                 return true;
3248         }
3249
3250         private static function addThread($itemid, $onlyshadow = false)
3251         {
3252                 $fields = ['uid', 'created', 'edited', 'commented', 'received', 'changed', 'wall', 'private', 'pubmail',
3253                         'moderated', 'visible', 'starred', 'contact-id', 'post-type', 'uri-id',
3254                         'deleted', 'origin', 'forum_mode', 'mention', 'network', 'author-id', 'owner-id'];
3255                 $condition = ["`id` = ? AND (`parent` = ? OR `parent` = 0)", $itemid, $itemid];
3256                 $item = self::selectFirst($fields, $condition);
3257
3258                 if (!DBA::isResult($item)) {
3259                         return;
3260                 }
3261
3262                 $item['iid'] = $itemid;
3263
3264                 if (!$onlyshadow) {
3265                         $result = DBA::insert('thread', $item);
3266
3267                         Logger::info('Add thread', ['item' => $itemid, 'result' => $result]);
3268                 }
3269         }
3270
3271         private static function updateThread($itemid, $setmention = false)
3272         {
3273                 $fields = ['uid', 'guid', 'created', 'edited', 'commented', 'received', 'changed', 'post-type',
3274                         'wall', 'private', 'pubmail', 'moderated', 'visible', 'starred', 'contact-id', 'uri-id',
3275                         'deleted', 'origin', 'forum_mode', 'network', 'author-id', 'owner-id'];
3276                 $condition = ["`id` = ? AND (`parent` = ? OR `parent` = 0)", $itemid, $itemid];
3277
3278                 $item = self::selectFirst($fields, $condition);
3279                 if (!DBA::isResult($item)) {
3280                         return;
3281                 }
3282
3283                 if ($setmention) {
3284                         $item["mention"] = 1;
3285                 }
3286
3287                 $fields = [];
3288
3289                 foreach ($item as $field => $data) {
3290                         if (!in_array($field, ["guid"])) {
3291                                 $fields[$field] = $data;
3292                         }
3293                 }
3294
3295                 $result = DBA::update('thread', $fields, ['iid' => $itemid]);
3296
3297                 Logger::info('Update thread', ['item' => $itemid, 'guid' => $item["guid"], 'result' => $result]);
3298         }
3299
3300         private static function deleteThread($itemid, $itemuri = "")
3301         {
3302                 $item = DBA::selectFirst('thread', ['uid'], ['iid' => $itemid]);
3303                 if (!DBA::isResult($item)) {
3304                         Logger::info('No thread found', ['id' => $itemid]);
3305                         return;
3306                 }
3307
3308                 $result = DBA::delete('thread', ['iid' => $itemid], ['cascade' => false]);
3309
3310                 Logger::info('Deleted thread', ['item' => $itemid, 'result' => $result]);
3311
3312                 if ($itemuri != "") {
3313                         $condition = ["`uri` = ? AND NOT `deleted` AND NOT (`uid` IN (?, 0))", $itemuri, $item["uid"]];
3314                         if (!self::exists($condition)) {
3315                                 DBA::delete('item', ['uri' => $itemuri, 'uid' => 0]);
3316                                 Logger::debug('Deleted shadow item', ['id' => $itemid, 'uri' => $itemuri]);
3317                         }
3318                 }
3319         }
3320
3321         public static function getPermissionsSQLByUserId($owner_id)
3322         {
3323                 $local_user = local_user();
3324                 $remote_user = Session::getRemoteContactID($owner_id);
3325
3326                 /*
3327                  * Construct permissions
3328                  *
3329                  * default permissions - anonymous user
3330                  */
3331                 $sql = sprintf(" AND `item`.`private` != %d", self::PRIVATE);
3332
3333                 // Profile owner - everything is visible
3334                 if ($local_user && ($local_user == $owner_id)) {
3335                         $sql = '';
3336                 } elseif ($remote_user) {
3337                         /*
3338                          * Authenticated visitor. Unless pre-verified,
3339                          * check that the contact belongs to this $owner_id
3340                          * and load the groups the visitor belongs to.
3341                          * If pre-verified, the caller is expected to have already
3342                          * done this and passed the groups into this function.
3343                          */
3344                         $set = PermissionSet::get($owner_id, $remote_user);
3345
3346                         if (!empty($set)) {
3347                                 $sql_set = sprintf(" OR (`item`.`private` = %d AND `item`.`wall` AND `item`.`psid` IN (", self::PRIVATE) . implode(',', $set) . "))";
3348                         } else {
3349                                 $sql_set = '';
3350                         }
3351
3352                         $sql = sprintf(" AND (`item`.`private` != %d", self::PRIVATE) . $sql_set . ")";
3353                 }
3354
3355                 return $sql;
3356         }
3357
3358         /**
3359          * get translated item type
3360          *
3361          * @param $item
3362          * @return string
3363          */
3364         public static function postType($item)
3365         {
3366                 if (!empty($item['event-id'])) {
3367                         return DI::l10n()->t('event');
3368                 } elseif (!empty($item['resource-id'])) {
3369                         return DI::l10n()->t('photo');
3370                 } elseif ($item['gravity'] == GRAVITY_ACTIVITY) {
3371                         return DI::l10n()->t('activity');
3372                 } elseif ($item['gravity'] == GRAVITY_COMMENT) {
3373                         return DI::l10n()->t('comment');
3374                 }
3375
3376                 return DI::l10n()->t('post');
3377         }
3378
3379         /**
3380          * Sets the "rendered-html" field of the provided item
3381          *
3382          * Body is preserved to avoid side-effects as we modify it just-in-time for spoilers and private image links
3383          *
3384          * @param array $item
3385          * @param bool  $update
3386          *
3387          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
3388          * @todo Remove reference, simply return "rendered-html" and "rendered-hash"
3389          */
3390         public static function putInCache(&$item, $update = false)
3391         {
3392                 $body = $item["body"];
3393
3394                 $rendered_hash = $item['rendered-hash'] ?? '';
3395                 $rendered_html = $item['rendered-html'] ?? '';
3396
3397                 if ($rendered_hash == ''
3398                         || $rendered_html == ""
3399                         || $rendered_hash != hash("md5", $item["body"])
3400                         || DI::config()->get("system", "ignore_cache")
3401                 ) {
3402                         self::addRedirToImageTags($item);
3403
3404                         $item["rendered-html"] = BBCode::convert($item["body"]);
3405                         $item["rendered-hash"] = hash("md5", $item["body"]);
3406
3407                         $hook_data = ['item' => $item, 'rendered-html' => $item['rendered-html'], 'rendered-hash' => $item['rendered-hash']];
3408                         Hook::callAll('put_item_in_cache', $hook_data);
3409                         $item['rendered-html'] = $hook_data['rendered-html'];
3410                         $item['rendered-hash'] = $hook_data['rendered-hash'];
3411                         unset($hook_data);
3412
3413                         // Force an update if the generated values differ from the existing ones
3414                         if ($rendered_hash != $item["rendered-hash"]) {
3415                                 $update = true;
3416                         }
3417
3418                         // Only compare the HTML when we forcefully ignore the cache
3419                         if (DI::config()->get("system", "ignore_cache") && ($rendered_html != $item["rendered-html"])) {
3420                                 $update = true;
3421                         }
3422
3423                         if ($update && !empty($item["id"])) {
3424                                 self::update(
3425                                         [
3426                                                 'rendered-html' => $item["rendered-html"],
3427                                                 'rendered-hash' => $item["rendered-hash"]
3428                                         ],
3429                                         ['id' => $item["id"]]
3430                                 );
3431                         }
3432                 }
3433
3434                 $item["body"] = $body;
3435         }
3436
3437         /**
3438          * Find any non-embedded images in private items and add redir links to them
3439          *
3440          * @param array &$item The field array of an item row
3441          */
3442         private static function addRedirToImageTags(array &$item)
3443         {
3444                 $app = DI::app();
3445
3446                 $matches = [];
3447                 $cnt = preg_match_all('|\[img\](http[^\[]*?/photo/[a-fA-F0-9]+?(-[0-9]\.[\w]+?)?)\[\/img\]|', $item['body'], $matches, PREG_SET_ORDER);
3448                 if ($cnt) {
3449                         foreach ($matches as $mtch) {
3450                                 if (strpos($mtch[1], '/redir') !== false) {
3451                                         continue;
3452                                 }
3453
3454                                 if ((local_user() == $item['uid']) && ($item['private'] == self::PRIVATE) && ($item['contact-id'] != $app->contact['id']) && ($item['network'] == Protocol::DFRN)) {
3455                                         $img_url = 'redir/' . $item['contact-id'] . '?url=' . urlencode($mtch[1]);
3456                                         $item['body'] = str_replace($mtch[0], '[img]' . $img_url . '[/img]', $item['body']);
3457                                 }
3458                         }
3459                 }
3460         }
3461
3462         /**
3463          * Given an item array, convert the body element from bbcode to html and add smilie icons.
3464          * If attach is true, also add icons for item attachments.
3465          *
3466          * @param array   $item
3467          * @param boolean $attach
3468          * @param boolean $is_preview
3469          * @return string item body html
3470          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
3471          * @throws \ImagickException
3472          * @hook  prepare_body_init item array before any work
3473          * @hook  prepare_body_content_filter ('item'=>item array, 'filter_reasons'=>string array) before first bbcode to html
3474          * @hook  prepare_body ('item'=>item array, 'html'=>body string, 'is_preview'=>boolean, 'filter_reasons'=>string array) after first bbcode to html
3475          * @hook  prepare_body_final ('item'=>item array, 'html'=>body string) after attach icons and blockquote special case handling (spoiler, author)
3476          */
3477         public static function prepareBody(array &$item, $attach = false, $is_preview = false)
3478         {
3479                 $a = DI::app();
3480                 Hook::callAll('prepare_body_init', $item);
3481
3482                 // In order to provide theme developers more possibilities, event items
3483                 // are treated differently.
3484                 if ($item['object-type'] === Activity\ObjectType::EVENT && isset($item['event-id'])) {
3485                         $ev = Event::getItemHTML($item);
3486                         return $ev;
3487                 }
3488
3489                 $tags = Tag::populateFromItem($item);
3490
3491                 $item['tags'] = $tags['tags'];
3492                 $item['hashtags'] = $tags['hashtags'];
3493                 $item['mentions'] = $tags['mentions'];
3494
3495                 // Compile eventual content filter reasons
3496                 $filter_reasons = [];
3497                 if (!$is_preview && public_contact() != $item['author-id']) {
3498                         if (!empty($item['content-warning']) && (!local_user() || !DI::pConfig()->get(local_user(), 'system', 'disable_cw', false))) {
3499                                 $filter_reasons[] = DI::l10n()->t('Content warning: %s', $item['content-warning']);
3500                         }
3501
3502                         $hook_data = [
3503                                 'item' => $item,
3504                                 'filter_reasons' => $filter_reasons
3505                         ];
3506                         Hook::callAll('prepare_body_content_filter', $hook_data);
3507                         $filter_reasons = $hook_data['filter_reasons'];
3508                         unset($hook_data);
3509                 }
3510
3511                 // Update the cached values if there is no "zrl=..." on the links.
3512                 $update = (!Session::isAuthenticated() && ($item["uid"] == 0));
3513
3514                 // Or update it if the current viewer is the intented viewer.
3515                 if (($item["uid"] == local_user()) && ($item["uid"] != 0)) {
3516                         $update = true;
3517                 }
3518
3519                 self::putInCache($item, $update);
3520                 $s = $item["rendered-html"];
3521
3522                 $hook_data = [
3523                         'item' => $item,
3524                         'html' => $s,
3525                         'preview' => $is_preview,
3526                         'filter_reasons' => $filter_reasons
3527                 ];
3528                 Hook::callAll('prepare_body', $hook_data);
3529                 $s = $hook_data['html'];
3530                 unset($hook_data);
3531
3532                 if (!$attach) {
3533                         // Replace the blockquotes with quotes that are used in mails.
3534                         $mailquote = '<blockquote type="cite" class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">';
3535                         $s = str_replace(['<blockquote>', '<blockquote class="spoiler">', '<blockquote class="author">'], [$mailquote, $mailquote, $mailquote], $s);
3536                         return $s;
3537                 }
3538
3539                 $as = '';
3540                 $vhead = false;
3541                 $matches = [];
3542                 preg_match_all('|\[attach\]href=\"(.*?)\" length=\"(.*?)\" type=\"(.*?)\"(?: title=\"(.*?)\")?|', $item['attach'], $matches, PREG_SET_ORDER);
3543                 foreach ($matches as $mtch) {
3544                         $mime = $mtch[3];
3545
3546                         $the_url = Contact::magicLinkById($item['author-id'], $mtch[1]);
3547
3548                         if (strpos($mime, 'video') !== false) {
3549                                 if (!$vhead) {
3550                                         $vhead = true;
3551                                         DI::page()['htmlhead'] .= Renderer::replaceMacros(Renderer::getMarkupTemplate('videos_head.tpl'));
3552                                 }
3553
3554                                 $url_parts = explode('/', $the_url);
3555                                 $id = end($url_parts);
3556                                 $as .= Renderer::replaceMacros(Renderer::getMarkupTemplate('video_top.tpl'), [
3557                                         '$video' => [
3558                                                 'id'     => $id,
3559                                                 'title'  => DI::l10n()->t('View Video'),
3560                                                 'src'    => $the_url,
3561                                                 'mime'   => $mime,
3562                                         ],
3563                                 ]);
3564                         }
3565
3566                         $filetype = strtolower(substr($mime, 0, strpos($mime, '/')));
3567                         if ($filetype) {
3568                                 $filesubtype = strtolower(substr($mime, strpos($mime, '/') + 1));
3569                                 $filesubtype = str_replace('.', '-', $filesubtype);
3570                         } else {
3571                                 $filetype = 'unkn';
3572                                 $filesubtype = 'unkn';
3573                         }
3574
3575                         $title = Strings::escapeHtml(trim(($mtch[4] ?? '') ?: $mtch[1]));
3576                         $title .= ' ' . $mtch[2] . ' ' . DI::l10n()->t('bytes');
3577
3578                         $icon = '<div class="attachtype icon s22 type-' . $filetype . ' subtype-' . $filesubtype . '"></div>';
3579                         $as .= '<a href="' . strip_tags($the_url) . '" title="' . $title . '" class="attachlink" target="_blank" rel="noopener noreferrer" >' . $icon . '</a>';
3580                 }
3581
3582                 if ($as != '') {
3583                         $s .= '<div class="body-attach">'.$as.'<div class="clear"></div></div>';
3584                 }
3585
3586                 // Map.
3587                 if (strpos($s, '<div class="map">') !== false && !empty($item['coord'])) {
3588                         $x = Map::byCoordinates(trim($item['coord']));
3589                         if ($x) {
3590                                 $s = preg_replace('/\<div class\=\"map\"\>/', '$0' . $x, $s);
3591                         }
3592                 }
3593
3594                 // Replace friendica image url size with theme preference.
3595                 if (!empty($a->theme_info['item_image_size'])) {
3596                         $ps = $a->theme_info['item_image_size'];
3597                         $s = preg_replace('|(<img[^>]+src="[^"]+/photo/[0-9a-f]+)-[0-9]|', "$1-" . $ps, $s);
3598                 }
3599
3600                 $s = HTML::applyContentFilter($s, $filter_reasons);
3601
3602                 $hook_data = ['item' => $item, 'html' => $s];
3603                 Hook::callAll('prepare_body_final', $hook_data);
3604
3605                 return $hook_data['html'];
3606         }
3607
3608         /**
3609          * get private link for item
3610          *
3611          * @param array $item
3612          * @return boolean|array False if item has not plink, otherwise array('href'=>plink url, 'title'=>translated title)
3613          * @throws \Exception
3614          */
3615         public static function getPlink($item)
3616         {
3617                 if (local_user()) {
3618                         $ret = [
3619                                 'href' => "display/" . $item['guid'],
3620                                 'orig' => "display/" . $item['guid'],
3621                                 'title' => DI::l10n()->t('View on separate page'),
3622                                 'orig_title' => DI::l10n()->t('view on separate page'),
3623                         ];
3624
3625                         if (!empty($item['plink'])) {
3626                                 $ret["href"] = DI::baseUrl()->remove($item['plink']);
3627                                 $ret["title"] = DI::l10n()->t('link to source');
3628                         }
3629                 } elseif (!empty($item['plink']) && ($item['private'] != self::PRIVATE)) {
3630                         $ret = [
3631                                 'href' => $item['plink'],
3632                                 'orig' => $item['plink'],
3633                                 'title' => DI::l10n()->t('link to source'),
3634                         ];
3635                 } else {
3636                         $ret = [];
3637                 }
3638
3639                 return $ret;
3640         }
3641
3642         /**
3643          * Is the given item array a post that is sent as starting post to a forum?
3644          *
3645          * @param array $item
3646          * @param array $owner
3647          *
3648          * @return boolean "true" when it is a forum post
3649          */
3650         public static function isForumPost(array $item, array $owner = [])
3651         {
3652                 if (empty($owner)) {
3653                         $owner = User::getOwnerDataById($item['uid']);
3654                         if (empty($owner)) {
3655                                 return false;
3656                         }
3657                 }
3658
3659                 if (($item['author-id'] == $item['owner-id']) ||
3660                         ($owner['id'] == $item['contact-id']) ||
3661                         ($item['uri'] != $item['parent-uri']) ||
3662                         $item['origin']) {
3663                         return false;
3664                 }
3665
3666                 return Contact::isForum($item['contact-id']);
3667         }
3668
3669         /**
3670          * Search item id for given URI or plink
3671          *
3672          * @param string $uri
3673          * @param integer $uid
3674          *
3675          * @return integer item id
3676          */
3677         public static function searchByLink($uri, $uid = 0)
3678         {
3679                 $ssl_uri = str_replace('http://', 'https://', $uri);
3680                 $uris = [$uri, $ssl_uri, Strings::normaliseLink($uri)];
3681
3682                 $item = DBA::selectFirst('item', ['id'], ['uri' => $uris, 'uid' => $uid]);
3683                 if (DBA::isResult($item)) {
3684                         return $item['id'];
3685                 }
3686
3687                 $itemcontent = DBA::selectFirst('item-content', ['uri-id'], ['plink' => $uris]);
3688                 if (!DBA::isResult($itemcontent)) {
3689                         return 0;
3690                 }
3691
3692                 $itemuri = DBA::selectFirst('item-uri', ['uri'], ['id' => $itemcontent['uri-id']]);
3693                 if (!DBA::isResult($itemuri)) {
3694                         return 0;
3695                 }
3696
3697                 $item = DBA::selectFirst('item', ['id'], ['uri' => $itemuri['uri'], 'uid' => $uid]);
3698                 if (DBA::isResult($item)) {
3699                         return $item['id'];
3700                 }
3701
3702                 return 0;
3703         }
3704
3705         /**
3706          * Return the URI for a link to the post
3707          *
3708          * @param string $uri URI or link to post
3709          *
3710          * @return string URI
3711          */
3712         public static function getURIByLink(string $uri)
3713         {
3714                 $ssl_uri = str_replace('http://', 'https://', $uri);
3715                 $uris = [$uri, $ssl_uri, Strings::normaliseLink($uri)];
3716
3717                 $item = DBA::selectFirst('item', ['uri'], ['uri' => $uris]);
3718                 if (DBA::isResult($item)) {
3719                         return $item['uri'];
3720                 }
3721
3722                 $itemcontent = DBA::selectFirst('item-content', ['uri-id'], ['plink' => $uris]);
3723                 if (!DBA::isResult($itemcontent)) {
3724                         return '';
3725                 }
3726
3727                 $itemuri = DBA::selectFirst('item-uri', ['uri'], ['id' => $itemcontent['uri-id']]);
3728                 if (DBA::isResult($itemuri)) {
3729                         return $itemuri['uri'];
3730                 }
3731
3732                 return '';
3733         }
3734
3735         /**
3736          * Fetches item for given URI or plink
3737          *
3738          * @param string $uri
3739          * @param integer $uid
3740          *
3741          * @return integer item id
3742          */
3743         public static function fetchByLink(string $uri, int $uid = 0)
3744         {
3745                 Logger::info('Trying to fetch link', ['uid' => $uid, 'uri' => $uri]);
3746                 $item_id = self::searchByLink($uri, $uid);
3747                 if (!empty($item_id)) {
3748                         Logger::info('Link found', ['uid' => $uid, 'uri' => $uri, 'id' => $item_id]);
3749                         return $item_id;
3750                 }
3751
3752                 if ($fetched_uri = ActivityPub\Processor::fetchMissingActivity($uri)) {
3753                         $item_id = self::searchByLink($fetched_uri, $uid);
3754                 } else {
3755                         $item_id = Diaspora::fetchByURL($uri);
3756                 }
3757
3758                 if (!empty($item_id)) {
3759                         Logger::info('Link fetched', ['uid' => $uid, 'uri' => $uri, 'id' => $item_id]);
3760                         return $item_id;
3761                 }
3762
3763                 Logger::info('Link not found', ['uid' => $uid, 'uri' => $uri]);
3764                 return 0;
3765         }
3766
3767         /**
3768          * Return share data from an item array (if the item is shared item)
3769          * We are providing the complete Item array, because at some time in the future
3770          * we hopefully will define these values not in the body anymore but in some item fields.
3771          * This function is meant to replace all similar functions in the system.
3772          *
3773          * @param array $item
3774          *
3775          * @return array with share information
3776          */
3777         public static function getShareArray($item)
3778         {
3779                 if (!preg_match("/(.*?)\[share(.*?)\]\s?(.*?)\s?\[\/share\]\s?/ism", $item['body'], $matches)) {
3780                         return [];
3781                 }
3782
3783                 $attribute_string = $matches[2];
3784                 $attributes = ['comment' => trim($matches[1]), 'shared' => trim($matches[3])];
3785                 foreach (['author', 'profile', 'avatar', 'guid', 'posted', 'link'] as $field) {
3786                         if (preg_match("/$field=(['\"])(.+?)\\1/ism", $attribute_string, $matches)) {
3787                                 $attributes[$field] = trim(html_entity_decode($matches[2] ?? '', ENT_QUOTES, 'UTF-8'));
3788                         }
3789                 }
3790                 return $attributes;
3791         }
3792
3793         /**
3794          * Fetch item information for shared items from the original items and adds it.
3795          *
3796          * @param array $item
3797          *
3798          * @return array item array with data from the original item
3799          */
3800         public static function addShareDataFromOriginal(array $item)
3801         {
3802                 $shared = self::getShareArray($item);
3803                 if (empty($shared)) {
3804                         return $item;
3805                 }
3806
3807                 // Real reshares always have got a GUID.
3808                 if (empty($shared['guid'])) {
3809                         return $item;
3810                 }
3811
3812                 $uid = $item['uid'] ?? 0;
3813
3814                 // first try to fetch the item via the GUID. This will work for all reshares that had been created on this system
3815                 $shared_item = self::selectFirst(['title', 'body', 'attach'], ['guid' => $shared['guid'], 'uid' => [0, $uid]]);
3816                 if (!DBA::isResult($shared_item)) {
3817                         if (empty($shared['link'])) {
3818                                 return $item;
3819                         }
3820
3821                         // Otherwhise try to find (and possibly fetch) the item via the link. This should work for Diaspora and ActivityPub posts
3822                         $id = self::fetchByLink($shared['link'] ?? '', $uid);
3823                         if (empty($id)) {
3824                                 Logger::info('Original item not found', ['url' => $shared['link'] ?? '', 'callstack' => System::callstack()]);
3825                                 return $item;
3826                         }
3827
3828                         $shared_item = self::selectFirst(['title', 'body', 'attach'], ['id' => $id]);
3829                         if (!DBA::isResult($shared_item)) {
3830                                 return $item;
3831                         }
3832                         Logger::info('Got shared data from url', ['url' => $shared['link'], 'callstack' => System::callstack()]);
3833                 } else {
3834                         Logger::info('Got shared data from guid', ['guid' => $shared['guid'], 'callstack' => System::callstack()]);
3835                 }
3836
3837                 if (!empty($shared_item['title'])) {
3838                         $body = '[h3]' . $shared_item['title'] . "[/h3]\n" . $shared_item['body'];
3839                         unset($shared_item['title']);
3840                 } else {
3841                         $body = $shared_item['body'];
3842                 }
3843
3844                 $item['body'] = preg_replace("/\[share ([^\[\]]*)\].*\[\/share\]/ism", '[share $1]' . $body . '[/share]', $item['body']);
3845                 unset($shared_item['body']);
3846
3847                 return array_merge($item, $shared_item);
3848         }
3849 }