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\DI;
  35 use Friendica\Model\Post\Category;
  36 use Friendica\Protocol\Activity;
  37 use Friendica\Protocol\ActivityPub;
  38 use Friendica\Protocol\Diaspora;
  39 use Friendica\Util\DateTimeFormat;
  40 use Friendica\Util\Map;
  41 use Friendica\Util\Network;
  42 use Friendica\Util\Security;
  43 use Friendica\Util\Strings;
  44 use Friendica\Worker\Delivery;
  45 use Text_LanguageDetect;
  46 use Friendica\Repository\PermissionSet as RepPermissionSet;
  47
  48 class Item
  49 {
  50         // Posting types, inspired by https://www.w3.org/TR/activitystreams-vocabulary/#object-types
  51         const PT_ARTICLE = 0;
  52         const PT_NOTE = 1;
  53         const PT_PAGE = 2;
  54         const PT_IMAGE = 16;
  55         const PT_AUDIO = 17;
  56         const PT_VIDEO = 18;
  57         const PT_DOCUMENT = 19;
  58         const PT_EVENT = 32;
  59         const PT_PERSONAL_NOTE = 128;
  60
  61         // Field list that is used to display the items
  62         const DISPLAY_FIELDLIST = [
  63                 'uid', 'id', 'parent', 'uri-id', 'uri', 'thr-parent', 'parent-uri', 'guid', 'network', 'gravity',
  64                 'commented', 'created', 'edited', 'received', 'verb', 'object-type', 'postopts', 'plink',
  65                 'wall', 'private', 'starred', 'origin', 'title', 'body', 'file', 'attach', 'language',
  66                 'content-warning', 'location', 'coord', 'app', 'rendered-hash', 'rendered-html', 'object',
  67                 'allow_cid', 'allow_gid', 'deny_cid', 'deny_gid', 'item_id',
  68                 'author-id', 'author-link', 'author-name', 'author-avatar', 'author-network',
  69                 'owner-id', 'owner-link', 'owner-name', 'owner-avatar', 'owner-network',
  70                 'contact-id', 'contact-uid', 'contact-link', 'contact-name', 'contact-avatar',
  71                 'writable', 'self', 'cid', 'alias', 'pinned',
  72                 'event-id', 'event-created', 'event-edited', 'event-start', 'event-finish',
  73                 'event-summary', 'event-desc', 'event-location', 'event-type',
  74                 'event-nofinish', 'event-adjust', 'event-ignore', 'event-id',
  75                 'delivery_queue_count', 'delivery_queue_done', 'delivery_queue_failed', 'activity'
  76         ];
  77
  78         // Field list that is used to deliver items via the protocols
  79         const DELIVER_FIELDLIST = ['uid', 'id', 'parent', 'uri-id', 'uri', 'thr-parent', 'parent-uri', 'guid',
  80                         'parent-guid', 'created', 'edited', 'verb', 'object-type', 'object', 'target',
  81                         'private', 'title', 'body', 'location', 'coord', 'app',
  82                         'attach', 'deleted', 'extid', 'post-type',
  83                         'allow_cid', 'allow_gid', 'deny_cid', 'deny_gid',
  84                         'author-id', 'author-link', 'owner-link', 'contact-uid',
  85                         'signed_text', 'signature', 'signer', 'network'];
  86
  87         // Field list for "item-content" table that is mixed with the item table
  88         const MIXED_CONTENT_FIELDLIST = ['title', 'content-warning', 'body', 'location',
  89                         'coord', 'app', 'rendered-hash', 'rendered-html', 'verb',
  90                         'object-type', 'object', 'target-type', 'target', 'plink'];
  91
  92         // Field list for "item-content" table that is not present in the "item" table
  93         const CONTENT_FIELDLIST = ['language'];
  94
  95         // All fields in the item table
  96         const ITEM_FIELDLIST = ['id', 'uid', 'parent', 'uri', 'parent-uri', 'thr-parent',
  97                         'guid', 'uri-id', 'parent-uri-id', 'thr-parent-id',
  98                         'contact-id', 'type', 'wall', 'gravity', 'extid', 'icid', 'iaid', 'psid',
  99                         'created', 'edited', 'commented', 'received', 'changed', 'verb',
 100                         'postopts', 'plink', 'resource-id', 'event-id', 'attach', 'inform',
 101                         'file', 'allow_cid', 'allow_gid', 'deny_cid', 'deny_gid', 'post-type',
 102                         'private', 'pubmail', 'moderated', 'visible', 'starred', 'bookmark',
 103                         'unseen', 'deleted', 'origin', 'forum_mode', 'mention', 'global', 'network',
 104                         'title', 'content-warning', 'body', 'location', 'coord', 'app',
 105                         'rendered-hash', 'rendered-html', 'object-type', 'object', 'target-type', 'target',
 106                         'author-id', 'author-link', 'author-name', 'author-avatar', 'author-network',
 107                         'owner-id', 'owner-link', 'owner-name', 'owner-avatar'];
 108
 109         // Never reorder or remove entries from this list. Just add new ones at the end, if needed.
 110         // The item-activity table only stores the index and needs this array to know the matching activity.
 111         const ACTIVITIES = [
 112                 Activity::LIKE, Activity::DISLIKE,
 113                 Activity::ATTEND, Activity::ATTENDNO, Activity::ATTENDMAYBE,
 114                 Activity::FOLLOW,
 115                 Activity::ANNOUNCE];
 116
 117         const PUBLIC = 0;
 118         const PRIVATE = 1;
 119         const UNLISTED = 2;
 120
 121         private static $legacy_mode = null;
 122
 123         public static function isLegacyMode()
 124         {
 125                 if (is_null(self::$legacy_mode)) {
 126                         self::$legacy_mode = (DI::config()->get("system", "post_update_version") < 1279);
 127                 }
 128
 129                 return self::$legacy_mode;
 130         }
 131
 132         /**
 133          * Set the pinned state of an item
 134          *
 135          * @param integer $iid    Item ID
 136          * @param integer $uid    User ID
 137          * @param boolean $pinned Pinned state
 138          */
 139         public static function setPinned(int $iid, int $uid, bool $pinned)
 140         {
 141                 DBA::update('user-item', ['pinned' => $pinned], ['iid' => $iid, 'uid' => $uid], true);
 142         }
 143
 144         /**
 145          * Get the pinned state
 146          *
 147          * @param integer $iid Item ID
 148          * @param integer $uid User ID
 149          *
 150          * @return boolean pinned state
 151          */
 152         public static function getPinned(int $iid, int $uid)
 153         {
 154                 $useritem = DBA::selectFirst('user-item', ['pinned'], ['iid' => $iid, 'uid' => $uid]);
 155                 if (!DBA::isResult($useritem)) {
 156                         return false;
 157                 }
 158                 return (bool)$useritem['pinned'];
 159         }
 160
 161         /**
 162          * Select pinned rows from the item table for a given user
 163          *
 164          * @param integer $uid       User ID
 165          * @param array   $selected  Array of selected fields, empty for all
 166          * @param array   $condition Array of fields for condition
 167          * @param array   $params    Array of several parameters
 168          *
 169          * @return boolean|object
 170          * @throws \Exception
 171          */
 172         public static function selectPinned(int $uid, array $selected = [], array $condition = [], $params = [])
 173         {
 174                 $useritems = DBA::select('user-item', ['iid'], ['uid' => $uid, 'pinned' => true]);
 175                 if (!DBA::isResult($useritems)) {
 176                         return $useritems;
 177                 }
 178
 179                 $pinned = [];
 180                 while ($useritem = DBA::fetch($useritems)) {
 181                         $pinned[] = $useritem['iid'];
 182                 }
 183                 DBA::close($useritems);
 184
 185                 if (empty($pinned)) {
 186                         return [];
 187                 }
 188
 189                 if (empty($condition) || !is_array($condition)) {
 190                         $condition = ['iid' => $pinned];
 191                 } else {
 192                         reset($condition);
 193                         $first_key = key($condition);
 194                         if (!is_int($first_key)) {
 195                                 $condition['iid'] = $pinned;
 196                         } else {
 197                                 $values_string = substr(str_repeat("?, ", count($pinned)), 0, -2);
 198                                 $condition[0] = '(' . $condition[0] . ") AND `iid` IN (" . $values_string . ")";
 199                                 $condition = array_merge($condition, $pinned);
 200                         }
 201                 }
 202
 203                 return self::selectThreadForUser($uid, $selected, $condition, $params);
 204         }
 205
 206         /**
 207          * returns an activity index from an activity string
 208          *
 209          * @param string $activity activity string
 210          * @return integer Activity index
 211          */
 212         public static function activityToIndex($activity)
 213         {
 214                 $index = array_search($activity, self::ACTIVITIES);
 215
 216                 if (is_bool($index)) {
 217                         $index = -1;
 218                 }
 219
 220                 return $index;
 221         }
 222
 223         /**
 224          * returns an activity string from an activity index
 225          *
 226          * @param integer $index activity index
 227          * @return string Activity string
 228          */
 229         private static function indexToActivity($index)
 230         {
 231                 if (is_null($index) || !array_key_exists($index, self::ACTIVITIES)) {
 232                         return '';
 233                 }
 234
 235                 return self::ACTIVITIES[$index];
 236         }
 237
 238         /**
 239          * Fetch a single item row
 240          *
 241          * @param mixed $stmt statement object
 242          * @return array current row
 243          */
 244         public static function fetch($stmt)
 245         {
 246                 $row = DBA::fetch($stmt);
 247
 248                 if (is_bool($row)) {
 249                         return $row;
 250                 }
 251
 252                 // ---------------------- Transform item structure data ----------------------
 253
 254                 // We prefer the data from the user's contact over the public one
 255                 if (!empty($row['author-link']) && !empty($row['contact-link']) &&
 256                         ($row['author-link'] == $row['contact-link'])) {
 257                         if (isset($row['author-avatar']) && !empty($row['contact-avatar'])) {
 258                                 $row['author-avatar'] = $row['contact-avatar'];
 259                         }
 260                         if (isset($row['author-name']) && !empty($row['contact-name'])) {
 261                                 $row['author-name'] = $row['contact-name'];
 262                         }
 263                 }
 264
 265                 if (!empty($row['owner-link']) && !empty($row['contact-link']) &&
 266                         ($row['owner-link'] == $row['contact-link'])) {
 267                         if (isset($row['owner-avatar']) && !empty($row['contact-avatar'])) {
 268                                 $row['owner-avatar'] = $row['contact-avatar'];
 269                         }
 270                         if (isset($row['owner-name']) && !empty($row['contact-name'])) {
 271                                 $row['owner-name'] = $row['contact-name'];
 272                         }
 273                 }
 274
 275                 // We can always comment on posts from these networks
 276                 if (array_key_exists('writable', $row) &&
 277                         in_array($row['internal-network'], Protocol::FEDERATED)) {
 278                         $row['writable'] = true;
 279                 }
 280
 281                 // ---------------------- Transform item content data ----------------------
 282
 283                 // Fetch data from the item-content table whenever there is content there
 284                 if (self::isLegacyMode()) {
 285                         $legacy_fields = array_merge(Post\DeliveryData::LEGACY_FIELD_LIST, self::MIXED_CONTENT_FIELDLIST);
 286                         foreach ($legacy_fields as $field) {
 287                                 if (empty($row[$field]) && !empty($row['internal-item-' . $field])) {
 288                                         $row[$field] = $row['internal-item-' . $field];
 289                                 }
 290                                 unset($row['internal-item-' . $field]);
 291                         }
 292                 }
 293
 294                 if (!empty($row['internal-iaid']) && array_key_exists('verb', $row)) {
 295                         $row['verb'] = self::indexToActivity($row['internal-activity']);
 296                         if (array_key_exists('title', $row)) {
 297                                 $row['title'] = '';
 298                         }
 299                         if (array_key_exists('body', $row)) {
 300                                 $row['body'] = $row['verb'];
 301                         }
 302                         if (array_key_exists('object', $row)) {
 303                                 $row['object'] = '';
 304                         }
 305                         if (array_key_exists('object-type', $row)) {
 306                                 $row['object-type'] = Activity\ObjectType::NOTE;
 307                         }
 308                 } elseif (array_key_exists('verb', $row) && in_array($row['verb'], ['', Activity::POST, Activity::SHARE])) {
 309                         // Posts don't have a target - but having tags or files.
 310                         // We safe some performance by building tag and file strings only here.
 311                         // We remove the target since they aren't used for this type.
 312                         // In mail posts we do store some mail header data in the object.
 313                         if (array_key_exists('target', $row)) {
 314                                 $row['target'] = '';
 315                         }
 316                 }
 317
 318                 if (!array_key_exists('verb', $row) || in_array($row['verb'], ['', Activity::POST, Activity::SHARE])) {
 319                         // Build the file string out of the term entries
 320                         if (array_key_exists('file', $row) && empty($row['file'])) {
 321                                 $row['file'] = Category::getTextByURIId($row['internal-uri-id'], $row['internal-uid']);
 322                         }
 323                 }
 324
 325                 if ($row['internal-psid'] == RepPermissionSet::PUBLIC) {
 326                         if (array_key_exists('allow_cid', $row)) {
 327                                 $row['allow_cid'] = '';
 328                         }
 329                         if (array_key_exists('allow_gid', $row)) {
 330                                 $row['allow_gid'] = '';
 331                         }
 332                         if (array_key_exists('deny_cid', $row)) {
 333                                 $row['deny_cid'] = '';
 334                         }
 335                         if (array_key_exists('deny_gid', $row)) {
 336                                 $row['deny_gid'] = '';
 337                         }
 338                 }
 339
 340                 if (array_key_exists('ignored', $row) && array_key_exists('internal-user-ignored', $row) && !is_null($row['internal-user-ignored'])) {
 341                         $row['ignored'] = $row['internal-user-ignored'];
 342                 }
 343
 344                 // Remove internal fields
 345                 unset($row['internal-activity']);
 346                 unset($row['internal-network']);
 347                 unset($row['internal-uri-id']);
 348                 unset($row['internal-uid']);
 349                 unset($row['internal-psid']);
 350                 unset($row['internal-iaid']);
 351                 unset($row['internal-user-ignored']);
 352                 unset($row['interaction']);
 353
 354                 return $row;
 355         }
 356
 357         /**
 358          * Fills an array with data from an item query
 359          *
 360          * @param object $stmt statement object
 361          * @param bool   $do_close
 362          * @return array Data array
 363          */
 364         public static function inArray($stmt, $do_close = true) {
 365                 if (is_bool($stmt)) {
 366                         return $stmt;
 367                 }
 368
 369                 $data = [];
 370                 while ($row = self::fetch($stmt)) {
 371                         $data[] = $row;
 372                 }
 373                 if ($do_close) {
 374                         DBA::close($stmt);
 375                 }
 376                 return $data;
 377         }
 378
 379         /**
 380          * Check if item data exists
 381          *
 382          * @param array $condition array of fields for condition
 383          *
 384          * @return boolean Are there rows for that condition?
 385          * @throws \Exception
 386          */
 387         public static function exists($condition) {
 388                 $stmt = self::select(['id'], $condition, ['limit' => 1]);
 389
 390                 if (is_bool($stmt)) {
 391                         $retval = $stmt;
 392                 } else {
 393                         $retval = (DBA::numRows($stmt) > 0);
 394                 }
 395
 396                 DBA::close($stmt);
 397
 398                 return $retval;
 399         }
 400
 401         /**
 402          * Retrieve a single record from the item table for a given user and returns it in an associative array
 403          *
 404          * @param integer $uid User ID
 405          * @param array   $selected
 406          * @param array   $condition
 407          * @param array   $params
 408          * @return bool|array
 409          * @throws \Exception
 410          * @see   DBA::select
 411          */
 412         public static function selectFirstForUser($uid, array $selected = [], array $condition = [], $params = [])
 413         {
 414                 $params['uid'] = $uid;
 415
 416                 if (empty($selected)) {
 417                         $selected = Item::DISPLAY_FIELDLIST;
 418                 }
 419
 420                 return self::selectFirst($selected, $condition, $params);
 421         }
 422
 423         /**
 424          * Select rows from the item table for a given user
 425          *
 426          * @param integer $uid       User ID
 427          * @param array   $selected  Array of selected fields, empty for all
 428          * @param array   $condition Array of fields for condition
 429          * @param array   $params    Array of several parameters
 430          *
 431          * @return boolean|object
 432          * @throws \Exception
 433          */
 434         public static function selectForUser($uid, array $selected = [], array $condition = [], $params = [])
 435         {
 436                 $params['uid'] = $uid;
 437
 438                 if (empty($selected)) {
 439                         $selected = Item::DISPLAY_FIELDLIST;
 440                 }
 441
 442                 return self::select($selected, $condition, $params);
 443         }
 444
 445         /**
 446          * Retrieve a single record from the item table and returns it in an associative array
 447          *
 448          * @param array $fields
 449          * @param array $condition
 450          * @param array $params
 451          * @return bool|array
 452          * @throws \Exception
 453          * @see   DBA::select
 454          */
 455         public static function selectFirst(array $fields = [], array $condition = [], $params = [])
 456         {
 457                 $params['limit'] = 1;
 458
 459                 $result = self::select($fields, $condition, $params);
 460
 461                 if (is_bool($result)) {
 462                         return $result;
 463                 } else {
 464                         $row = self::fetch($result);
 465                         DBA::close($result);
 466                         return $row;
 467                 }
 468         }
 469
 470         /**
 471          * Select rows from the item table and returns them as an array
 472          *
 473          * @param array $selected  Array of selected fields, empty for all
 474          * @param array $condition Array of fields for condition
 475          * @param array $params    Array of several parameters
 476          *
 477          * @return array
 478          * @throws \Exception
 479          */
 480         public static function selectToArray(array $fields = [], array $condition = [], $params = [])
 481         {
 482                 $result = self::select($fields, $condition, $params);
 483
 484                 if (is_bool($result)) {
 485                         return [];
 486                 }
 487
 488                 $data = [];
 489                 while ($row = self::fetch($result)) {
 490                         $data[] = $row;
 491                 }
 492                 DBA::close($result);
 493
 494                 return $data;
 495         }
 496
 497         /**
 498          * Select rows from the item table
 499          *
 500          * @param array $selected  Array of selected fields, empty for all
 501          * @param array $condition Array of fields for condition
 502          * @param array $params    Array of several parameters
 503          *
 504          * @return boolean|object
 505          * @throws \Exception
 506          */
 507         public static function select(array $selected = [], array $condition = [], $params = [])
 508         {
 509                 $uid = 0;
 510                 $usermode = false;
 511
 512                 if (isset($params['uid'])) {
 513                         $uid = $params['uid'];
 514                         $usermode = true;
 515                 }
 516
 517                 $fields = self::fieldlist($usermode);
 518
 519                 $select_fields = self::constructSelectFields($fields, $selected);
 520
 521                 $condition_string = DBA::buildCondition($condition);
 522
 523                 $condition_string = self::addTablesToFields($condition_string, $fields);
 524
 525                 if ($usermode) {
 526                         $condition_string = $condition_string . ' AND ' . self::condition(false);
 527                 }
 528
 529                 $param_string = self::addTablesToFields(DBA::buildParameter($params), $fields);
 530
 531                 $table = "`item` " . self::constructJoins($uid, $select_fields . $condition_string . $param_string, false, $usermode);
 532
 533                 $sql = "SELECT " . $select_fields . " FROM " . $table . $condition_string . $param_string;
 534
 535                 return DBA::p($sql, $condition);
 536         }
 537
 538         /**
 539          * Select rows from the starting post in the item table
 540          *
 541          * @param integer $uid       User ID
 542          * @param array   $selected
 543          * @param array   $condition Array of fields for condition
 544          * @param array   $params    Array of several parameters
 545          *
 546          * @return boolean|object
 547          * @throws \Exception
 548          */
 549         public static function selectThreadForUser($uid, array $selected = [], array $condition = [], $params = [])
 550         {
 551                 $params['uid'] = $uid;
 552
 553                 if (empty($selected)) {
 554                         $selected = Item::DISPLAY_FIELDLIST;
 555                 }
 556
 557                 return self::selectThread($selected, $condition, $params);
 558         }
 559
 560         /**
 561          * Retrieve a single record from the starting post in the item table and returns it in an associative array
 562          *
 563          * @param integer $uid User ID
 564          * @param array   $selected
 565          * @param array   $condition
 566          * @param array   $params
 567          * @return bool|array
 568          * @throws \Exception
 569          * @see   DBA::select
 570          */
 571         public static function selectFirstThreadForUser($uid, array $selected = [], array $condition = [], $params = [])
 572         {
 573                 $params['uid'] = $uid;
 574
 575                 if (empty($selected)) {
 576                         $selected = Item::DISPLAY_FIELDLIST;
 577                 }
 578
 579                 return self::selectFirstThread($selected, $condition, $params);
 580         }
 581
 582         /**
 583          * Retrieve a single record from the starting post in the item table and returns it in an associative array
 584          *
 585          * @param array $fields
 586          * @param array $condition
 587          * @param array $params
 588          * @return bool|array
 589          * @throws \Exception
 590          * @see   DBA::select
 591          */
 592         public static function selectFirstThread(array $fields = [], array $condition = [], $params = [])
 593         {
 594                 $params['limit'] = 1;
 595                 $result = self::selectThread($fields, $condition, $params);
 596
 597                 if (is_bool($result)) {
 598                         return $result;
 599                 } else {
 600                         $row = self::fetch($result);
 601                         DBA::close($result);
 602                         return $row;
 603                 }
 604         }
 605
 606         /**
 607          * Select rows from the starting post in the item table
 608          *
 609          * @param array $selected  Array of selected fields, empty for all
 610          * @param array $condition Array of fields for condition
 611          * @param array $params    Array of several parameters
 612          *
 613          * @return boolean|object
 614          * @throws \Exception
 615          */
 616         public static function selectThread(array $selected = [], array $condition = [], $params = [])
 617         {
 618                 $uid = 0;
 619                 $usermode = false;
 620
 621                 if (isset($params['uid'])) {
 622                         $uid = $params['uid'];
 623                         $usermode = true;
 624                 }
 625
 626                 $fields = self::fieldlist($usermode);
 627
 628                 $fields['thread'] = ['mention', 'ignored', 'iid'];
 629
 630                 $threadfields = ['thread' => ['iid', 'uid', 'contact-id', 'owner-id', 'author-id',
 631                         'created', 'edited', 'commented', 'received', 'changed', 'wall', 'private',
 632                         'pubmail', 'moderated', 'visible', 'starred', 'ignored', 'post-type',
 633                         'unseen', 'deleted', 'origin', 'forum_mode', 'mention', 'network']];
 634
 635                 $select_fields = self::constructSelectFields($fields, $selected);
 636
 637                 $condition_string = DBA::buildCondition($condition);
 638
 639                 $condition_string = self::addTablesToFields($condition_string, $threadfields);
 640                 $condition_string = self::addTablesToFields($condition_string, $fields);
 641
 642                 if ($usermode) {
 643                         $condition_string = $condition_string . ' AND ' . self::condition(true);
 644                 }
 645
 646                 $param_string = DBA::buildParameter($params);
 647                 $param_string = self::addTablesToFields($param_string, $threadfields);
 648                 $param_string = self::addTablesToFields($param_string, $fields);
 649
 650                 $table = "`thread` " . self::constructJoins($uid, $select_fields . $condition_string . $param_string, true, $usermode);
 651
 652                 $sql = "SELECT " . $select_fields . " FROM " . $table . $condition_string . $param_string;
 653
 654                 return DBA::p($sql, $condition);
 655         }
 656
 657         /**
 658          * Returns a list of fields that are associated with the item table
 659          *
 660          * @param $usermode
 661          * @return array field list
 662          */
 663         private static function fieldlist($usermode)
 664         {
 665                 $fields = [];
 666
 667                 $fields['item'] = ['id', 'uid', 'parent', 'uri', 'parent-uri', 'thr-parent',
 668                         'guid', 'uri-id', 'parent-uri-id', 'thr-parent-id',
 669                         'contact-id', 'owner-id', 'author-id', 'type', 'wall', 'gravity', 'extid',
 670                         'created', 'edited', 'commented', 'received', 'changed', 'psid',
 671                         'resource-id', 'event-id', 'attach', 'post-type', 'file',
 672                         'private', 'pubmail', 'moderated', 'visible', 'starred', 'bookmark',
 673                         'unseen', 'deleted', 'origin', 'forum_mode', 'mention', 'global',
 674                         'id' => 'item_id', 'network', 'icid', 'iaid',
 675                         'uri-id' => 'internal-uri-id', 'uid' => 'internal-uid',
 676                         'network' => 'internal-network', 'iaid' => 'internal-iaid', 'psid' => 'internal-psid'];
 677
 678                 if ($usermode) {
 679                         $fields['user-item'] = ['pinned', 'notification-type', 'ignored' => 'internal-user-ignored'];
 680                 }
 681
 682                 $fields['item-activity'] = ['activity', 'activity' => 'internal-activity'];
 683
 684                 $fields['item-content'] = array_merge(self::CONTENT_FIELDLIST, self::MIXED_CONTENT_FIELDLIST);
 685
 686                 $fields['post-delivery-data'] = array_merge(Post\DeliveryData::LEGACY_FIELD_LIST, Post\DeliveryData::FIELD_LIST);
 687
 688                 $fields['permissionset'] = ['allow_cid', 'allow_gid', 'deny_cid', 'deny_gid'];
 689
 690                 $fields['author'] = ['url' => 'author-link', 'name' => 'author-name', 'addr' => 'author-addr',
 691                         'thumb' => 'author-avatar', 'nick' => 'author-nick', 'network' => 'author-network'];
 692
 693                 $fields['owner'] = ['url' => 'owner-link', 'name' => 'owner-name', 'addr' => 'owner-addr',
 694                         'thumb' => 'owner-avatar', 'nick' => 'owner-nick', 'network' => 'owner-network'];
 695
 696                 $fields['contact'] = ['url' => 'contact-link', 'name' => 'contact-name', 'thumb' => 'contact-avatar',
 697                         'writable', 'self', 'id' => 'cid', 'alias', 'uid' => 'contact-uid',
 698                         'photo', 'name-date', 'uri-date', 'avatar-date', 'thumb', 'dfrn-id'];
 699
 700                 $fields['parent-item'] = ['guid' => 'parent-guid', 'network' => 'parent-network'];
 701
 702                 $fields['parent-item-author'] = ['url' => 'parent-author-link', 'name' => 'parent-author-name'];
 703
 704                 $fields['event'] = ['created' => 'event-created', 'edited' => 'event-edited',
 705                         'start' => 'event-start','finish' => 'event-finish',
 706                         'summary' => 'event-summary','desc' => 'event-desc',
 707                         'location' => 'event-location', 'type' => 'event-type',
 708                         'nofinish' => 'event-nofinish','adjust' => 'event-adjust',
 709                         'ignore' => 'event-ignore', 'id' => 'event-id'];
 710
 711                 $fields['diaspora-interaction'] = ['interaction', 'interaction' => 'signed_text'];
 712
 713                 return $fields;
 714         }
 715
 716         /**
 717          * Returns SQL condition for the "select" functions
 718          *
 719          * @param boolean $thread_mode Called for the items (false) or for the threads (true)
 720          *
 721          * @return string SQL condition
 722          */
 723         private static function condition($thread_mode)
 724         {
 725                 if ($thread_mode) {
 726                         $master_table = "`thread`";
 727                 } else {
 728                         $master_table = "`item`";
 729                 }
 730                 return sprintf("$master_table.`visible` AND NOT $master_table.`deleted` AND NOT $master_table.`moderated`
 731                         AND (`user-item`.`hidden` IS NULL OR NOT `user-item`.`hidden`)
 732                         AND (`user-author`.`blocked` IS NULL OR NOT `user-author`.`blocked`)
 733                         AND (`user-author`.`ignored` IS NULL OR NOT `user-author`.`ignored` OR `item`.`gravity` != %d)
 734                         AND (`user-owner`.`blocked` IS NULL OR NOT `user-owner`.`blocked`)
 735                         AND (`user-owner`.`ignored` IS NULL OR NOT `user-owner`.`ignored` OR `item`.`gravity` != %d) ",
 736                         GRAVITY_PARENT, GRAVITY_PARENT);
 737         }
 738
 739         /**
 740          * Returns all needed "JOIN" commands for the "select" functions
 741          *
 742          * @param integer $uid          User ID
 743          * @param string  $sql_commands The parts of the built SQL commands in the "select" functions
 744          * @param boolean $thread_mode  Called for the items (false) or for the threads (true)
 745          *
 746          * @param         $user_mode
 747          * @return string The SQL joins for the "select" functions
 748          */
 749         private static function constructJoins($uid, $sql_commands, $thread_mode, $user_mode)
 750         {
 751                 if ($thread_mode) {
 752                         $master_table = "`thread`";
 753                         $master_table_key = "`thread`.`iid`";
 754                         $joins = "STRAIGHT_JOIN `item` ON `item`.`id` = `thread`.`iid` ";
 755                 } else {
 756                         $master_table = "`item`";
 757                         $master_table_key = "`item`.`id`";
 758                         $joins = '';
 759                 }
 760
 761                 if ($user_mode) {
 762                         $joins .= sprintf("STRAIGHT_JOIN `contact` ON `contact`.`id` = $master_table.`contact-id`
 763                                 AND NOT `contact`.`blocked`
 764                                 AND ((NOT `contact`.`readonly` AND NOT `contact`.`pending` AND (`contact`.`rel` IN (%s, %s)))
 765                                 OR `contact`.`self` OR `item`.`gravity` != %d OR `contact`.`uid` = 0)
 766                                 STRAIGHT_JOIN `contact` AS `author` ON `author`.`id` = $master_table.`author-id` AND NOT `author`.`blocked`
 767                                 STRAIGHT_JOIN `contact` AS `owner` ON `owner`.`id` = $master_table.`owner-id` AND NOT `owner`.`blocked`
 768                                 LEFT JOIN `user-item` ON `user-item`.`iid` = $master_table_key AND `user-item`.`uid` = %d
 769                                 LEFT JOIN `user-contact` AS `user-author` ON `user-author`.`cid` = $master_table.`author-id` AND `user-author`.`uid` = %d
 770                                 LEFT JOIN `user-contact` AS `user-owner` ON `user-owner`.`cid` = $master_table.`owner-id` AND `user-owner`.`uid` = %d",
 771                                 Contact::SHARING, Contact::FRIEND, GRAVITY_PARENT, intval($uid), intval($uid), intval($uid));
 772                 } else {
 773                         if (strpos($sql_commands, "`contact`.") !== false) {
 774                                 $joins .= "LEFT JOIN `contact` ON `contact`.`id` = $master_table.`contact-id`";
 775                         }
 776                         if (strpos($sql_commands, "`author`.") !== false) {
 777                                 $joins .= " LEFT JOIN `contact` AS `author` ON `author`.`id` = $master_table.`author-id`";
 778                         }
 779                         if (strpos($sql_commands, "`owner`.") !== false) {
 780                                 $joins .= " LEFT JOIN `contact` AS `owner` ON `owner`.`id` = $master_table.`owner-id`";
 781                         }
 782                 }
 783
 784                 if (strpos($sql_commands, "`group_member`.") !== false) {
 785                         $joins .= " STRAIGHT_JOIN `group_member` ON `group_member`.`contact-id` = $master_table.`contact-id`";
 786                 }
 787
 788                 if (strpos($sql_commands, "`user`.") !== false) {
 789                         $joins .= " STRAIGHT_JOIN `user` ON `user`.`uid` = $master_table.`uid`";
 790                 }
 791
 792                 if (strpos($sql_commands, "`event`.") !== false) {
 793                         $joins .= " LEFT JOIN `event` ON `event-id` = `event`.`id`";
 794                 }
 795
 796                 if (strpos($sql_commands, "`diaspora-interaction`.") !== false) {
 797                         $joins .= " LEFT JOIN `diaspora-interaction` ON `diaspora-interaction`.`uri-id` = `item`.`uri-id`";
 798                 }
 799
 800                 if (strpos($sql_commands, "`item-activity`.") !== false) {
 801                         $joins .= " LEFT JOIN `item-activity` ON `item-activity`.`uri-id` = `item`.`uri-id`";
 802                 }
 803
 804                 if (strpos($sql_commands, "`item-content`.") !== false) {
 805                         $joins .= " LEFT JOIN `item-content` ON `item-content`.`uri-id` = `item`.`uri-id`";
 806                 }
 807
 808                 if (strpos($sql_commands, "`post-delivery-data`.") !== false) {
 809                         $joins .= " LEFT JOIN `post-delivery-data` ON `post-delivery-data`.`uri-id` = `item`.`uri-id` AND `item`.`origin`";
 810                 }
 811
 812                 if (strpos($sql_commands, "`permissionset`.") !== false) {
 813                         $joins .= " LEFT JOIN `permissionset` ON `permissionset`.`id` = `item`.`psid`";
 814                 }
 815
 816                 if ((strpos($sql_commands, "`parent-item`.") !== false) || (strpos($sql_commands, "`parent-author`.") !== false)) {
 817                         $joins .= " STRAIGHT_JOIN `item` AS `parent-item` ON `parent-item`.`id` = `item`.`parent`";
 818                 }
 819
 820                 if (strpos($sql_commands, "`parent-item-author`.") !== false) {
 821                         $joins .= " STRAIGHT_JOIN `contact` AS `parent-item-author` ON `parent-item-author`.`id` = `parent-item`.`author-id`";
 822                 }
 823
 824                 return $joins;
 825         }
 826
 827         /**
 828          * Add the field list for the "select" functions
 829          *
 830          * @param array $fields The field definition array
 831          * @param array $selected The array with the selected fields from the "select" functions
 832          *
 833          * @return string The field list
 834          */
 835         private static function constructSelectFields(array $fields, array $selected)
 836         {
 837                 if (!empty($selected)) {
 838                         $selected = array_merge($selected, ['internal-uri-id', 'internal-uid', 'internal-psid', 'internal-iaid', 'internal-network']);
 839                 }
 840
 841                 if (in_array('verb', $selected)) {
 842                         $selected[] = 'internal-activity';
 843                 }
 844
 845                 if (in_array('ignored', $selected)) {
 846                         $selected[] = 'internal-user-ignored';
 847                 }
 848
 849                 $legacy_fields = array_merge(Post\DeliveryData::LEGACY_FIELD_LIST, self::MIXED_CONTENT_FIELDLIST);
 850
 851                 $selection = [];
 852                 foreach ($fields as $table => $table_fields) {
 853                         foreach ($table_fields as $field => $select) {
 854                                 if (empty($selected) || in_array($select, $selected)) {
 855                                         if (self::isLegacyMode() && in_array($select, $legacy_fields)) {
 856                                                 $selection[] = "`item`.`".$select."` AS `internal-item-" . $select . "`";
 857                                         }
 858                                         if (is_int($field)) {
 859                                                 $selection[] = "`" . $table . "`.`" . $select . "`";
 860                                         } else {
 861                                                 $selection[] = "`" . $table . "`.`" . $field . "` AS `" . $select . "`";
 862                                         }
 863                                 }
 864                         }
 865                 }
 866                 return implode(", ", $selection);
 867         }
 868
 869         /**
 870          * add table definition to fields in an SQL query
 871          *
 872          * @param string $query SQL query
 873          * @param array $fields The field definition array
 874          *
 875          * @return string the changed SQL query
 876          */
 877         private static function addTablesToFields($query, $fields)
 878         {
 879                 foreach ($fields as $table => $table_fields) {
 880                         foreach ($table_fields as $alias => $field) {
 881                                 if (is_int($alias)) {
 882                                         $replace_field = $field;
 883                                 } else {
 884                                         $replace_field = $alias;
 885                                 }
 886
 887                                 $search = "/([^\.])`" . $field . "`/i";
 888                                 $replace = "$1`" . $table . "`.`" . $replace_field . "`";
 889                                 $query = preg_replace($search, $replace, $query);
 890                         }
 891                 }
 892                 return $query;
 893         }
 894
 895         /**
 896          * Update existing item entries
 897          *
 898          * @param array $fields    The fields that are to be changed
 899          * @param array $condition The condition for finding the item entries
 900          *
 901          * In the future we may have to change permissions as well.
 902          * Then we had to add the user id as third parameter.
 903          *
 904          * A return value of "0" doesn't mean an error - but that 0 rows had been changed.
 905          *
 906          * @return integer|boolean number of affected rows - or "false" if there was an error
 907          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 908          */
 909         public static function update(array $fields, array $condition)
 910         {
 911                 if (empty($condition) || empty($fields)) {
 912                         return false;
 913                 }
 914
 915                 // To ensure the data integrity we do it in an transaction
 916                 DBA::transaction();
 917
 918                 // We cannot simply expand the condition to check for origin entries
 919                 // The condition needn't to be a simple array but could be a complex condition.
 920                 // And we have to execute this query before the update to ensure to fetch the same data.
 921                 $items = DBA::select('item', ['id', 'origin', 'uri', 'uri-id', 'iaid', 'icid', 'uid', 'file'], $condition);
 922
 923                 $content_fields = [];
 924                 foreach (array_merge(self::CONTENT_FIELDLIST, self::MIXED_CONTENT_FIELDLIST) as $field) {
 925                         if (isset($fields[$field])) {
 926                                 $content_fields[$field] = $fields[$field];
 927                                 if (in_array($field, self::CONTENT_FIELDLIST) || !self::isLegacyMode()) {
 928                                         unset($fields[$field]);
 929                                 } else {
 930                                         $fields[$field] = null;
 931                                 }
 932                         }
 933                 }
 934
 935                 $delivery_data = Post\DeliveryData::extractFields($fields);
 936
 937                 $clear_fields = ['bookmark', 'type', 'author-name', 'author-avatar', 'author-link', 'owner-name', 'owner-avatar', 'owner-link', 'postopts', 'inform'];
 938                 foreach ($clear_fields as $field) {
 939                         if (array_key_exists($field, $fields)) {
 940                                 $fields[$field] = null;
 941                         }
 942                 }
 943
 944                 if (array_key_exists('file', $fields)) {
 945                         $files = $fields['file'];
 946                         $fields['file'] = null;
 947                 } else {
 948                         $files = null;
 949                 }
 950
 951                 if (!empty($fields)) {
 952                         $success = DBA::update('item', $fields, $condition);
 953
 954                         if (!$success) {
 955                                 DBA::close($items);
 956                                 DBA::rollback();
 957                                 return false;
 958                         }
 959                 }
 960
 961                 // When there is no content for the "old" item table, this will count the fetched items
 962                 $rows = DBA::affectedRows();
 963
 964                 $notify_items = [];
 965
 966                 while ($item = DBA::fetch($items)) {
 967                         if (!empty($item['iaid']) || (!empty($content_fields['verb']) && (self::activityToIndex($content_fields['verb']) >= 0))) {
 968                                 self::updateActivity($content_fields, ['uri-id' => $item['uri-id']]);
 969
 970                                 if (empty($item['iaid'])) {
 971                                         $item_activity = DBA::selectFirst('item-activity', ['id'], ['uri-id' => $item['uri-id']]);
 972                                         if (DBA::isResult($item_activity)) {
 973                                                 $item_fields = ['iaid' => $item_activity['id'], 'icid' => null];
 974                                                 foreach (self::MIXED_CONTENT_FIELDLIST as $field) {
 975                                                         if (self::isLegacyMode()) {
 976                                                                 $item_fields[$field] = null;
 977                                                         } else {
 978                                                                 unset($item_fields[$field]);
 979                                                         }
 980                                                 }
 981                                                 DBA::update('item', $item_fields, ['id' => $item['id']]);
 982
 983                                                 if (!empty($item['icid']) && !DBA::exists('item', ['icid' => $item['icid']])) {
 984                                                         DBA::delete('item-content', ['id' => $item['icid']]);
 985                                                 }
 986                                         }
 987                                 } elseif (!empty($item['icid'])) {
 988                                         DBA::update('item', ['icid' => null], ['id' => $item['id']]);
 989
 990                                         if (!DBA::exists('item', ['icid' => $item['icid']])) {
 991                                                 DBA::delete('item-content', ['id' => $item['icid']]);
 992                                         }
 993                                 }
 994                         } else {
 995                                 self::updateContent($content_fields, ['uri-id' => $item['uri-id']]);
 996
 997                                 if (empty($item['icid'])) {
 998                                         $item_content = DBA::selectFirst('item-content', [], ['uri-id' => $item['uri-id']]);
 999                                         if (DBA::isResult($item_content)) {
1000                                                 $item_fields = ['icid' => $item_content['id']];
1001                                                 // Clear all fields in the item table that have a content in the item-content table
1002                                                 foreach ($item_content as $field => $content) {
1003                                                         if (in_array($field, self::MIXED_CONTENT_FIELDLIST) && !empty($item_content[$field])) {
1004                                                                 if (self::isLegacyMode()) {
1005                                                                         $item_fields[$field] = null;
1006                                                                 } else {
1007                                                                         unset($item_fields[$field]);
1008                                                                 }
1009                                                         }
1010                                                 }
1011                                                 DBA::update('item', $item_fields, ['id' => $item['id']]);
1012                                         }
1013                                 }
1014                         }
1015
1016                         if (!is_null($files)) {
1017                                 Category::storeTextByURIId($item['uri-id'], $item['uid'], $files);
1018                                 if (!empty($item['file'])) {
1019                                         DBA::update('item', ['file' => ''], ['id' => $item['id']]);
1020                                 }
1021                         }
1022
1023                         Post\DeliveryData::update($item['uri-id'], $delivery_data);
1024
1025                         self::updateThread($item['id']);
1026
1027                         // We only need to notfiy others when it is an original entry from us.
1028                         // Only call the notifier when the item has some content relevant change.
1029                         if ($item['origin'] && in_array('edited', array_keys($fields))) {
1030                                 $notify_items[] = $item['id'];
1031                         }
1032                 }
1033
1034                 DBA::close($items);
1035                 DBA::commit();
1036
1037                 foreach ($notify_items as $notify_item) {
1038                         Worker::add(PRIORITY_HIGH, "Notifier", Delivery::POST, $notify_item);
1039                 }
1040
1041                 return $rows;
1042         }
1043
1044         /**
1045          * Delete an item and notify others about it - if it was ours
1046          *
1047          * @param array   $condition The condition for finding the item entries
1048          * @param integer $priority  Priority for the notification
1049          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1050          */
1051         public static function markForDeletion($condition, $priority = PRIORITY_HIGH)
1052         {
1053                 $items = self::select(['id'], $condition);
1054                 while ($item = self::fetch($items)) {
1055                         self::markForDeletionById($item['id'], $priority);
1056                 }
1057                 DBA::close($items);
1058         }
1059
1060         /**
1061          * Delete an item for an user and notify others about it - if it was ours
1062          *
1063          * @param array   $condition The condition for finding the item entries
1064          * @param integer $uid       User who wants to delete this item
1065          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1066          */
1067         public static function deleteForUser($condition, $uid)
1068         {
1069                 if ($uid == 0) {
1070                         return;
1071                 }
1072
1073                 $items = self::select(['id', 'uid'], $condition);
1074                 while ($item = self::fetch($items)) {
1075                         // "Deleting" global items just means hiding them
1076                         if ($item['uid'] == 0) {
1077                                 DBA::update('user-item', ['hidden' => true], ['iid' => $item['id'], 'uid' => $uid], true);
1078
1079                                 // Delete notifications
1080                                 DBA::delete('notify', ['iid' => $item['id'], 'uid' => $uid]);
1081                         } elseif ($item['uid'] == $uid) {
1082                                 self::markForDeletionById($item['id'], PRIORITY_HIGH);
1083                         } else {
1084                                 Logger::log('Wrong ownership. Not deleting item ' . $item['id']);
1085                         }
1086                 }
1087                 DBA::close($items);
1088         }
1089
1090         /**
1091          * Mark an item for deletion, delete related data and notify others about it - if it was ours
1092          *
1093          * @param integer $item_id
1094          * @param integer $priority Priority for the notification
1095          *
1096          * @return boolean success
1097          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1098          */
1099         public static function markForDeletionById($item_id, $priority = PRIORITY_HIGH)
1100         {
1101                 Logger::info('Mark item for deletion by id', ['id' => $item_id, 'callstack' => System::callstack()]);
1102                 // locate item to be deleted
1103                 $fields = ['id', 'uri', 'uri-id', 'uid', 'parent', 'parent-uri', 'origin',
1104                         'deleted', 'file', 'resource-id', 'event-id', 'attach',
1105                         'verb', 'object-type', 'object', 'target', 'contact-id',
1106                         'icid', 'iaid', 'psid'];
1107                 $item = self::selectFirst($fields, ['id' => $item_id]);
1108                 if (!DBA::isResult($item)) {
1109                         Logger::info('Item not found.', ['id' => $item_id]);
1110                         return false;
1111                 }
1112
1113                 if ($item['deleted']) {
1114                         Logger::info('Item has already been marked for deletion.', ['id' => $item_id]);
1115                         return false;
1116                 }
1117
1118                 $parent = self::selectFirst(['origin'], ['id' => $item['parent']]);
1119                 if (!DBA::isResult($parent)) {
1120                         $parent = ['origin' => false];
1121                 }
1122
1123                 // clean up categories and tags so they don't end up as orphans
1124
1125                 $matches = false;
1126                 $cnt = preg_match_all('/<(.*?)>/', $item['file'], $matches, PREG_SET_ORDER);
1127
1128                 if ($cnt) {
1129                         foreach ($matches as $mtch) {
1130                                 FileTag::unsaveFile($item['uid'], $item['id'], $mtch[1],true);
1131                         }
1132                 }
1133
1134                 $matches = false;
1135
1136                 $cnt = preg_match_all('/\[(.*?)\]/', $item['file'], $matches, PREG_SET_ORDER);
1137
1138                 if ($cnt) {
1139                         foreach ($matches as $mtch) {
1140                                 FileTag::unsaveFile($item['uid'], $item['id'], $mtch[1],false);
1141                         }
1142                 }
1143
1144                 /*
1145                  * If item is a link to a photo resource, nuke all the associated photos
1146                  * (visitors will not have photo resources)
1147                  * This only applies to photos uploaded from the photos page. Photos inserted into a post do not
1148                  * generate a resource-id and therefore aren't intimately linked to the item.
1149                  */
1150                 /// @TODO: this should first check if photo is used elsewhere
1151                 if (strlen($item['resource-id'])) {
1152                         Photo::delete(['resource-id' => $item['resource-id'], 'uid' => $item['uid']]);
1153                 }
1154
1155                 // If item is a link to an event, delete the event.
1156                 if (intval($item['event-id'])) {
1157                         Event::delete($item['event-id']);
1158                 }
1159
1160                 // If item has attachments, drop them
1161                 /// @TODO: this should first check if attachment is used elsewhere
1162                 foreach (explode(",", $item['attach']) as $attach) {
1163                         preg_match("|attach/(\d+)|", $attach, $matches);
1164                         if (is_array($matches) && count($matches) > 1) {
1165                                 Attach::delete(['id' => $matches[1], 'uid' => $item['uid']]);
1166                         }
1167                 }
1168
1169                 // Delete notifications
1170                 DBA::delete('notify', ['iid' => $item['id'], 'uid' => $item['uid']]);
1171
1172                 // Set the item to "deleted"
1173                 $item_fields = ['deleted' => true, 'edited' => DateTimeFormat::utcNow(), 'changed' => DateTimeFormat::utcNow()];
1174                 DBA::update('item', $item_fields, ['id' => $item['id']]);
1175
1176                 Category::storeTextByURIId($item['uri-id'], $item['uid'], '');
1177                 self::deleteThread($item['id'], $item['parent-uri']);
1178
1179                 if (!self::exists(["`uri` = ? AND `uid` != 0 AND NOT `deleted`", $item['uri']])) {
1180                         self::markForDeletion(['uri' => $item['uri'], 'uid' => 0, 'deleted' => false], $priority);
1181                 }
1182
1183                 Post\DeliveryData::delete($item['uri-id']);
1184
1185                 // We don't delete the item-activity here, since we need some of the data for ActivityPub
1186
1187                 if (!empty($item['icid']) && !self::exists(['icid' => $item['icid'], 'deleted' => false])) {
1188                         DBA::delete('item-content', ['id' => $item['icid']], ['cascade' => false]);
1189                 }
1190                 // When the permission set will be used in photo and events as well,
1191                 // this query here needs to be extended.
1192                 // @todo Currently deactivated. We need the permission set in the deletion process.
1193                 // This is a reminder to add the removal somewhere else.
1194                 //if (!empty($item['psid']) && !self::exists(['psid' => $item['psid'], 'deleted' => false])) {
1195                 //      DBA::delete('permissionset', ['id' => $item['psid']], ['cascade' => false]);
1196                 //}
1197
1198                 // If it's the parent of a comment thread, kill all the kids
1199                 if ($item['id'] == $item['parent']) {
1200                         self::markForDeletion(['parent' => $item['parent'], 'deleted' => false], $priority);
1201                 }
1202
1203                 // Is it our comment and/or our thread?
1204                 if ($item['origin'] || $parent['origin']) {
1205                         // When we delete the original post we will delete all existing copies on the server as well
1206                         self::markForDeletion(['uri' => $item['uri'], 'deleted' => false], $priority);
1207
1208                         // send the notification upstream/downstream
1209                         Worker::add(['priority' => $priority, 'dont_fork' => true], "Notifier", Delivery::DELETION, intval($item['id']));
1210                 } elseif ($item['uid'] != 0) {
1211
1212                         // When we delete just our local user copy of an item, we have to set a marker to hide it
1213                         $global_item = self::selectFirst(['id'], ['uri' => $item['uri'], 'uid' => 0, 'deleted' => false]);
1214                         if (DBA::isResult($global_item)) {
1215                                 DBA::update('user-item', ['hidden' => true], ['iid' => $global_item['id'], 'uid' => $item['uid']], true);
1216                         }
1217                 }
1218
1219                 Logger::info('Item has been marked for deletion.', ['id' => $item_id]);
1220
1221                 return true;
1222         }
1223
1224
1225         private static function guid($item, $notify)
1226         {
1227                 if (!empty($item['guid'])) {
1228                         return Strings::escapeTags(trim($item['guid']));
1229                 }
1230
1231                 if ($notify) {
1232                         // We have to avoid duplicates. So we create the GUID in form of a hash of the plink or uri.
1233                         // We add the hash of our own host because our host is the original creator of the post.
1234                         $prefix_host = DI::baseUrl()->getHostname();
1235                 } else {
1236                         $prefix_host = '';
1237
1238                         // We are only storing the post so we create a GUID from the original hostname.
1239                         if (!empty($item['author-link'])) {
1240                                 $parsed = parse_url($item['author-link']);
1241                                 if (!empty($parsed['host'])) {
1242                                         $prefix_host = $parsed['host'];
1243                                 }
1244                         }
1245
1246                         if (empty($prefix_host) && !empty($item['plink'])) {
1247                                 $parsed = parse_url($item['plink']);
1248                                 if (!empty($parsed['host'])) {
1249                                         $prefix_host = $parsed['host'];
1250                                 }
1251                         }
1252
1253                         if (empty($prefix_host) && !empty($item['uri'])) {
1254                                 $parsed = parse_url($item['uri']);
1255                                 if (!empty($parsed['host'])) {
1256                                         $prefix_host = $parsed['host'];
1257                                 }
1258                         }
1259
1260                         // Is it in the format data@host.tld? - Used for mail contacts
1261                         if (empty($prefix_host) && !empty($item['author-link']) && strstr($item['author-link'], '@')) {
1262                                 $mailparts = explode('@', $item['author-link']);
1263                                 $prefix_host = array_pop($mailparts);
1264                         }
1265                 }
1266
1267                 if (!empty($item['plink'])) {
1268                         $guid = self::guidFromUri($item['plink'], $prefix_host);
1269                 } elseif (!empty($item['uri'])) {
1270                         $guid = self::guidFromUri($item['uri'], $prefix_host);
1271                 } else {
1272                         $guid = System::createUUID(hash('crc32', $prefix_host));
1273                 }
1274
1275                 return $guid;
1276         }
1277
1278         private static function contactId($item)
1279         {
1280                 if (!empty($item['contact-id']) && DBA::exists('contact', ['self' => true, 'id' => $item['contact-id']])) {
1281                         return $item['contact-id'];
1282                 } elseif (($item['gravity'] == GRAVITY_PARENT) && !empty($item['uid']) && !empty($item['contact-id']) && Contact::isSharing($item['contact-id'], $item['uid'])) {
1283                         return $item['contact-id'];
1284                 } elseif (!empty($item['uid']) && !Contact::isSharing($item['author-id'], $item['uid'])) {
1285                         return $item['author-id'];
1286                 } elseif (!empty($item['contact-id'])) {
1287                         return $item['contact-id'];
1288                 } else {
1289                         $contact_id = Contact::getIdForURL($item['author-link'], $item['uid']);
1290                         if (!empty($contact_id)) {
1291                                 return $contact_id;
1292                         }
1293                 }
1294                 return $item['author-id'];
1295         }
1296
1297         // This function will finally cover most of the preparation functionality in mod/item.php
1298         public static function prepare(&$item)
1299         {
1300                 /*
1301                  * @TODO: Unused code triggering inspection errors
1302                  *
1303                 $data = BBCode::getAttachmentData($item['body']);
1304                 if ((preg_match_all("/\[bookmark\=([^\]]*)\](.*?)\[\/bookmark\]/ism", $item['body'], $match, PREG_SET_ORDER) || isset($data["type"]))
1305                         && ($posttype != Item::PT_PERSONAL_NOTE)) {
1306                         $posttype = Item::PT_PAGE;
1307                         $objecttype = ACTIVITY_OBJ_BOOKMARK;
1308                 }
1309                  */
1310         }
1311
1312         /**
1313          * Write an item array into a spool file to be inserted later.
1314          * This command is called whenever there are issues storing an item.
1315          *
1316          * @param array $item The item fields that are to be inserted
1317          * @throws \Exception
1318          */
1319         private static function spool($orig_item)
1320         {
1321                 // Now we store the data in the spool directory
1322                 // We use "microtime" to keep the arrival order and "mt_rand" to avoid duplicates
1323                 $file = 'item-' . round(microtime(true) * 10000) . '-' . mt_rand() . '.msg';
1324
1325                 $spoolpath = get_spoolpath();
1326                 if ($spoolpath != "") {
1327                         $spool = $spoolpath . '/' . $file;
1328
1329                         file_put_contents($spool, json_encode($orig_item));
1330                         Logger::warning("Item wasn't stored - Item was spooled into file", ['file' => $file]);
1331                 }
1332         }
1333
1334         private static function isDuplicate($item)
1335         {
1336                 // Checking if there is already an item with the same guid
1337                 $condition = ['guid' => $item['guid'], 'network' => $item['network'], 'uid' => $item['uid']];
1338                 if (self::exists($condition)) {
1339                         Logger::notice('Found already existing item', [
1340                                 'guid' => $item['guid'],
1341                                 'uid' => $item['uid'],
1342                                 'network' => $item['network']
1343                         ]);
1344                         return true;
1345                 }
1346
1347                 $condition = ["`uri` = ? AND `network` IN (?, ?) AND `uid` = ?",
1348                         $item['uri'], $item['network'], Protocol::DFRN, $item['uid']];
1349                 if (self::exists($condition)) {
1350                         Logger::notice('duplicated item with the same uri found.', $item);
1351                         return true;
1352                 }
1353
1354                 // On Friendica and Diaspora the GUID is unique
1355                 if (in_array($item['network'], [Protocol::DFRN, Protocol::DIASPORA])) {
1356                         $condition = ['guid' => $item['guid'], 'uid' => $item['uid']];
1357                         if (self::exists($condition)) {
1358                                 Logger::notice('duplicated item with the same guid found.', $item);
1359                                 return true;
1360                         }
1361                 } elseif ($item['network'] == Protocol::OSTATUS) {
1362                         // Check for an existing post with the same content. There seems to be a problem with OStatus.
1363                         $condition = ["`body` = ? AND `network` = ? AND `created` = ? AND `contact-id` = ? AND `uid` = ?",
1364                                         $item['body'], $item['network'], $item['created'], $item['contact-id'], $item['uid']];
1365                         if (self::exists($condition)) {
1366                                 Logger::notice('duplicated item with the same body found.', $item);
1367                                 return true;
1368                         }
1369                 }
1370
1371                 /*
1372                  * Check for already added items.
1373                  * There is a timing issue here that sometimes creates double postings.
1374                  * An unique index would help - but the limitations of MySQL (maximum size of index values) prevent this.
1375                  */
1376                 if (($item["uid"] == 0) && self::exists(['uri' => trim($item['uri']), 'uid' => 0])) {
1377                         Logger::notice('Global item already stored.', ['uri' => $item['uri'], 'network' => $item['network']]);
1378                         return true;
1379                 }
1380
1381                 return false;
1382         }
1383
1384         private static function validItem($item)
1385         {
1386                 // When there is no content then we don't post it
1387                 if ($item['body'].$item['title'] == '') {
1388                         Logger::notice('No body, no title.');
1389                         return false;
1390                 }
1391
1392                 // check for create date and expire time
1393                 $expire_interval = DI::config()->get('system', 'dbclean-expire-days', 0);
1394
1395                 $user = DBA::selectFirst('user', ['expire'], ['uid' => $item['uid']]);
1396                 if (DBA::isResult($user) && ($user['expire'] > 0) && (($user['expire'] < $expire_interval) || ($expire_interval == 0))) {
1397                         $expire_interval = $user['expire'];
1398                 }
1399
1400                 if (($expire_interval > 0) && !empty($item['created'])) {
1401                         $expire_date = time() - ($expire_interval * 86400);
1402                         $created_date = strtotime($item['created']);
1403                         if ($created_date < $expire_date) {
1404                                 Logger::notice('Item created before expiration interval.', [
1405                                         'created' => date('c', $created_date),
1406                                         'expired' => date('c', $expire_date),
1407                                         '$item' => $item
1408                                 ]);
1409                                 return false;
1410                         }
1411                 }
1412
1413                 if (Contact::isBlocked($item['author-id'])) {
1414                         Logger::notice('Author is blocked node-wide', ['author-link' => $item['author-link'], 'item-uri' => $item['uri']]);
1415                         return false;
1416                 }
1417
1418                 if (!empty($item['author-link']) && Network::isUrlBlocked($item['author-link'])) {
1419                         Logger::notice('Author server is blocked', ['author-link' => $item['author-link'], 'item-uri' => $item['uri']]);
1420                         return false;
1421                 }
1422
1423                 if (!empty($item['uid']) && Contact::isBlockedByUser($item['author-id'], $item['uid'])) {
1424                         Logger::notice('Author is blocked by user', ['author-link' => $item['author-link'], 'uid' => $item['uid'], 'item-uri' => $item['uri']]);
1425                         return false;
1426                 }
1427
1428                 if (Contact::isBlocked($item['owner-id'])) {
1429                         Logger::notice('Owner is blocked node-wide', ['owner-link' => $item['owner-link'], 'item-uri' => $item['uri']]);
1430                         return false;
1431                 }
1432
1433                 if (!empty($item['owner-link']) && Network::isUrlBlocked($item['owner-link'])) {
1434                         Logger::notice('Owner server is blocked', ['owner-link' => $item['owner-link'], 'item-uri' => $item['uri']]);
1435                         return false;
1436                 }
1437
1438                 if (!empty($item['uid']) && Contact::isBlockedByUser($item['owner-id'], $item['uid'])) {
1439                         Logger::notice('Owner is blocked by user', ['owner-link' => $item['owner-link'], 'uid' => $item['uid'], 'item-uri' => $item['uri']]);
1440                         return false;
1441                 }
1442
1443                 // The causer is set during a thread completion, for example because of a reshare. It countains the responsible actor.
1444                 if (!empty($item['uid']) && !empty($item['causer-id']) && Contact::isBlockedByUser($item['causer-id'], $item['uid'])) {
1445                         Logger::notice('Causer is blocked by user', ['causer-link' => $item['causer-link'], 'uid' => $item['uid'], 'item-uri' => $item['uri']]);
1446                         return false;
1447                 }
1448
1449                 if (!empty($item['uid']) && !empty($item['causer-id']) && ($item['parent-uri'] == $item['uri']) && Contact::isIgnoredByUser($item['causer-id'], $item['uid'])) {
1450                         Logger::notice('Causer is ignored by user', ['causer-link' => $item['causer-link'], 'uid' => $item['uid'], 'item-uri' => $item['uri']]);
1451                         return false;
1452                 }
1453
1454                 if ($item['verb'] == Activity::FOLLOW) {
1455                         if (!$item['origin'] && ($item['author-id'] == Contact::getPublicIdByUserId($item['uid']))) {
1456                                 // Our own follow request can be relayed to us. We don't store it to avoid notification chaos.
1457                                 Logger::log("Follow: Don't store not origin follow request from us for " . $item['parent-uri'], Logger::DEBUG);
1458                                 return false;
1459                         }
1460
1461                         $condition = ['verb' => Activity::FOLLOW, 'uid' => $item['uid'],
1462                                 'parent-uri' => $item['parent-uri'], 'author-id' => $item['author-id']];
1463                         if (self::exists($condition)) {
1464                                 // It happens that we receive multiple follow requests by the same author - we only store one.
1465                                 Logger::log('Follow: Found existing follow request from author ' . $item['author-id'] . ' for ' . $item['parent-uri'], Logger::DEBUG);
1466                                 return false;
1467                         }
1468                 }
1469
1470                 return true;
1471         }
1472
1473         private static function getDuplicateID($item)
1474         {
1475                 if (empty($item['network']) || in_array($item['network'], Protocol::FEDERATED)) {
1476                         $condition = ["`uri` = ? AND `uid` = ? AND `network` IN (?, ?, ?, ?)",
1477                                 trim($item['uri']), $item['uid'],
1478                                 Protocol::ACTIVITYPUB, Protocol::DIASPORA, Protocol::DFRN, Protocol::OSTATUS];
1479                         $existing = self::selectFirst(['id', 'network'], $condition);
1480                         if (DBA::isResult($existing)) {
1481                                 // We only log the entries with a different user id than 0. Otherwise we would have too many false positives
1482                                 if ($item['uid'] != 0) {
1483                                         Logger::notice('Item already existed for user', [
1484                                                 'uri' => $item['uri'],
1485                                                 'uid' => $item['uid'],
1486                                                 'network' => $item['network'],
1487                                                 'existing_id' => $existing["id"],
1488                                                 'existing_network' => $existing["network"]
1489                                         ]);
1490                                 }
1491
1492                                 return $existing["id"];
1493                         }
1494                 }
1495                 return 0;
1496         }
1497
1498         private static function getParentData($item)
1499         {
1500                 // find the parent and snarf the item id and ACLs
1501                 // and anything else we need to inherit
1502
1503                 $fields = ['uri', 'parent-uri', 'id', 'deleted',
1504                         'allow_cid', 'allow_gid', 'deny_cid', 'deny_gid',
1505                         'wall', 'private', 'forum_mode', 'origin', 'author-id'];
1506                 $condition = ['uri' => $item['parent-uri'], 'uid' => $item['uid']];
1507                 $params = ['order' => ['id' => false]];
1508                 $parent = self::selectFirst($fields, $condition, $params);
1509
1510                 if (!DBA::isResult($parent)) {
1511                         Logger::info('item parent was not found - ignoring item', ['parent-uri' => $item['parent-uri'], 'uid' => $item['uid']]);
1512                         return [];
1513                 } else {
1514                         // is the new message multi-level threaded?
1515                         // even though we don't support it now, preserve the info
1516                         // and re-attach to the conversation parent.
1517                         if ($parent['uri'] != $parent['parent-uri']) {
1518                                 $item['parent-uri'] = $parent['parent-uri'];
1519
1520                                 $condition = ['uri' => $item['parent-uri'],
1521                                         'parent-uri' => $item['parent-uri'],
1522                                         'uid' => $item['uid']];
1523                                 $params = ['order' => ['id' => false]];
1524                                 $toplevel_parent = self::selectFirst($fields, $condition, $params);
1525
1526                                 if (DBA::isResult($toplevel_parent)) {
1527                                         $parent = $toplevel_parent;
1528                                 }
1529                         }
1530
1531                         $item["parent"]        = $parent['id'];
1532                         $item["deleted"]       = $parent['deleted'];
1533                         $item["allow_cid"]     = $parent['allow_cid'];
1534                         $item['allow_gid']     = $parent['allow_gid'];
1535                         $item['deny_cid']      = $parent['deny_cid'];
1536                         $item['deny_gid']      = $parent['deny_gid'];
1537                         $item['parent_origin'] = $parent['origin'];
1538
1539                         // Don't federate received participation messages
1540                         if ($item['verb'] != Activity::FOLLOW) {
1541                                 $item['wall'] = $parent['wall'];
1542                         } else {
1543                                 $item['wall'] = false;
1544                         }
1545
1546                         /*
1547                          * If the parent is private, force privacy for the entire conversation
1548                          * This differs from the above settings as it subtly allows comments from
1549                          * email correspondents to be private even if the overall thread is not.
1550                          */
1551                         if ($parent['private']) {
1552                                 $item['private'] = $parent['private'];
1553                         }
1554
1555                         /*
1556                          * Edge case. We host a public forum that was originally posted to privately.
1557                          * The original author commented, but as this is a comment, the permissions
1558                          * weren't fixed up so it will still show the comment as private unless we fix it here.
1559                          */
1560                         if ((intval($parent['forum_mode']) == 1) && ($parent['private'] != self::PUBLIC)) {
1561                                 $item['private'] = self::PUBLIC;
1562                         }
1563
1564                         // If its a post that originated here then tag the thread as "mention"
1565                         if ($item['origin'] && $item['uid']) {
1566                                 DBA::update('thread', ['mention' => true], ['iid' => $item["parent"]]);
1567                                 Logger::info('tagged thread as mention', ['parent' => $item["parent"], 'uid' => $item['uid']]);
1568                         }
1569
1570                         // Update the contact relations
1571                         if ($item['author-id'] != $parent['author-id']) {
1572                                 DBA::update('contact-relation', ['last-interaction' => $item['created']], ['cid' => $parent['author-id'], 'relation-cid' => $item['author-id']], true);
1573                         }
1574                 }
1575
1576                 return $item;
1577         }
1578
1579         private static function getGravity($item)
1580         {
1581                 $activity = DI::activity();
1582
1583                 if (isset($item['gravity'])) {
1584                         return intval($item['gravity']);
1585                 } elseif ($item['parent-uri'] === $item['uri']) {
1586                         return GRAVITY_PARENT;
1587                 } elseif ($activity->match($item['verb'], Activity::POST)) {
1588                         return GRAVITY_COMMENT;
1589                 } elseif ($activity->match($item['verb'], Activity::FOLLOW)) {
1590                         return GRAVITY_ACTIVITY;
1591                 }
1592                 Logger::info('Unknown gravity for verb', ['verb' => $item['verb']]);
1593                 return GRAVITY_UNKNOWN;   // Should not happen
1594         }
1595
1596         public static function insert($item, $notify = false, $dontcache = false)
1597         {
1598                 $orig_item = $item;
1599
1600                 $priority = PRIORITY_HIGH;
1601
1602                 // If it is a posting where users should get notifications, then define it as wall posting
1603                 if ($notify) {
1604                         $item['wall'] = 1;
1605                         $item['origin'] = 1;
1606                         $item['network'] = Protocol::DFRN;
1607                         $item['protocol'] = Conversation::PARCEL_DFRN;
1608
1609                         if (is_int($notify)) {
1610                                 $priority = $notify;
1611                         }
1612                 } else {
1613                         $item['network'] = trim(($item['network'] ?? '') ?: Protocol::PHANTOM);
1614                 }
1615
1616                 $uid = intval($item['uid']);
1617
1618                 $item['guid'] = self::guid($item, $notify);
1619                 $item['uri'] = substr(Strings::escapeTags(trim(($item['uri'] ?? '') ?: self::newURI($item['uid'], $item['guid']))), 0, 255);
1620
1621                 // Store URI data
1622                 $item['uri-id'] = ItemURI::insert(['uri' => $item['uri'], 'guid' => $item['guid']]);
1623
1624                 // Store conversation data
1625                 $item = Conversation::insert($item);
1626
1627                 if (!empty($item['thr-parent'])) {
1628                         $item['parent-uri'] = $item['thr-parent'];
1629                 }
1630
1631                 /*
1632                  * Do we already have this item?
1633                  * We have to check several networks since Friendica posts could be repeated
1634                  * via OStatus (maybe Diasporsa as well)
1635                  */
1636                 $duplicate = self::getDuplicateID($item);
1637                 if ($duplicate) {
1638                         return $duplicate;
1639                 }
1640
1641                 // Additional duplicate checks
1642                 /// @todo Check why the first duplication check returns the item number and the second a 0
1643                 if (self::isDuplicate($item)) {
1644                         return 0;
1645                 }
1646
1647                 $item['wall']          = intval($item['wall'] ?? 0);
1648                 $item['extid']         = trim($item['extid'] ?? '');
1649                 $item['author-name']   = trim($item['author-name'] ?? '');
1650                 $item['author-link']   = trim($item['author-link'] ?? '');
1651                 $item['author-avatar'] = trim($item['author-avatar'] ?? '');
1652                 $item['owner-name']    = trim($item['owner-name'] ?? '');
1653                 $item['owner-link']    = trim($item['owner-link'] ?? '');
1654                 $item['owner-avatar']  = trim($item['owner-avatar'] ?? '');
1655                 $item['received']      = (isset($item['received'])  ? DateTimeFormat::utc($item['received'])  : DateTimeFormat::utcNow());
1656                 $item['created']       = (isset($item['created'])   ? DateTimeFormat::utc($item['created'])   : $item['received']);
1657                 $item['edited']        = (isset($item['edited'])    ? DateTimeFormat::utc($item['edited'])    : $item['created']);
1658                 $item['changed']       = (isset($item['changed'])   ? DateTimeFormat::utc($item['changed'])   : $item['created']);
1659                 $item['commented']     = (isset($item['commented']) ? DateTimeFormat::utc($item['commented']) : $item['created']);
1660                 $item['title']         = substr(trim($item['title'] ?? ''), 0, 255);
1661                 $item['location']      = trim($item['location'] ?? '');
1662                 $item['coord']         = trim($item['coord'] ?? '');
1663                 $item['visible']       = (isset($item['visible']) ? intval($item['visible']) : 1);
1664                 $item['deleted']       = 0;
1665                 $item['parent-uri']    = trim(($item['parent-uri'] ?? '') ?: $item['uri']);
1666                 $item['post-type']     = ($item['post-type'] ?? '') ?: self::PT_ARTICLE;
1667                 $item['verb']          = trim($item['verb'] ?? '');
1668                 $item['object-type']   = trim($item['object-type'] ?? '');
1669                 $item['object']        = trim($item['object'] ?? '');
1670                 $item['target-type']   = trim($item['target-type'] ?? '');
1671                 $item['target']        = trim($item['target'] ?? '');
1672                 $item['plink']         = substr(trim($item['plink'] ?? ''), 0, 255);
1673                 $item['allow_cid']     = trim($item['allow_cid'] ?? '');
1674                 $item['allow_gid']     = trim($item['allow_gid'] ?? '');
1675                 $item['deny_cid']      = trim($item['deny_cid'] ?? '');
1676                 $item['deny_gid']      = trim($item['deny_gid'] ?? '');
1677                 $item['private']       = intval($item['private'] ?? self::PUBLIC);
1678                 $item['body']          = trim($item['body'] ?? '');
1679                 $item['attach']        = trim($item['attach'] ?? '');
1680                 $item['app']           = trim($item['app'] ?? '');
1681                 $item['origin']        = intval($item['origin'] ?? 0);
1682                 $item['postopts']      = trim($item['postopts'] ?? '');
1683                 $item['resource-id']   = trim($item['resource-id'] ?? '');
1684                 $item['event-id']      = intval($item['event-id'] ?? 0);
1685                 $item['inform']        = trim($item['inform'] ?? '');
1686                 $item['file']          = trim($item['file'] ?? '');
1687
1688                 self::addLanguageToItemArray($item);
1689
1690                 // Items cannot be stored before they happen ...
1691                 if ($item['created'] > DateTimeFormat::utcNow()) {
1692                         $item['created'] = DateTimeFormat::utcNow();
1693                 }
1694
1695                 // We haven't invented time travel by now.
1696                 if ($item['edited'] > DateTimeFormat::utcNow()) {
1697                         $item['edited'] = DateTimeFormat::utcNow();
1698                 }
1699
1700                 $item['plink'] = ($item['plink'] ?? '') ?: DI::baseUrl() . '/display/' . urlencode($item['guid']);
1701
1702                 $item['gravity'] = self::getGravity($item);
1703
1704                 $default = ['url' => $item['author-link'], 'name' => $item['author-name'],
1705                         'photo' => $item['author-avatar'], 'network' => $item['network']];
1706
1707                 $item['author-id'] = ($item['author-id'] ?? 0) ?: Contact::getIdForURL($item['author-link'], 0, false, $default);
1708
1709                 unset($item['author-link']);
1710                 unset($item['author-name']);
1711                 unset($item['author-avatar']);
1712                 unset($item['author-network']);
1713
1714                 $default = ['url' => $item['owner-link'], 'name' => $item['owner-name'],
1715                         'photo' => $item['owner-avatar'], 'network' => $item['network']];
1716
1717                 $item['owner-id'] = ($item['owner-id'] ?? 0) ?: Contact::getIdForURL($item['owner-link'], 0, false, $default);
1718
1719                 unset($item['owner-link']);
1720                 unset($item['owner-name']);
1721                 unset($item['owner-avatar']);
1722
1723                 // The contact-id should be set before "self::insert" was called - but there seems to be issues sometimes
1724                 $item["contact-id"] = self::contactId($item);
1725
1726                 if ($item['network'] == Protocol::PHANTOM) {
1727                         $item['network'] = Protocol::DFRN;
1728                         Logger::notice('Missing network, setting to {network}.', [
1729                                 'uri' => $item["uri"],
1730                                 'network' => $item['network'],
1731                                 'callstack' => System::callstack()
1732                         ]);
1733                 }
1734
1735                 if (!self::validItem($item)) {
1736                         return 0;
1737                 }
1738
1739                 // We don't store the causer, we only have it here for the checks in the function above
1740                 unset($item['causer-id']);
1741                 unset($item['causer-link']);
1742
1743                 $item['thr-parent'] = $item['parent-uri'];
1744
1745                 if ($item['parent-uri'] != $item['uri']) {
1746                         $item = self::getParentData($item);
1747                         if (empty($item)) {
1748                                 return 0;
1749                         }
1750
1751                         $parent_id = $item['parent'];
1752                         unset($item['parent']);
1753                         $parent_origin = $item['parent_origin'];
1754                         unset($item['parent_origin']);
1755                 } else {
1756                         $parent_id = 0;
1757                         $parent_origin = $item['origin'];
1758                 }
1759
1760                 $item['parent-uri-id'] = ItemURI::getIdByURI($item['parent-uri']);
1761                 $item['thr-parent-id'] = ItemURI::getIdByURI($item['thr-parent']);
1762
1763                 // Is this item available in the global items (with uid=0)?
1764                 if ($item["uid"] == 0) {
1765                         $item["global"] = true;
1766
1767                         // Set the global flag on all items if this was a global item entry
1768                         DBA::update('item', ['global' => true], ['uri' => $item["uri"]]);
1769                 } else {
1770                         $item["global"] = self::exists(['uid' => 0, 'uri' => $item["uri"]]);
1771                 }
1772
1773                 // ACL settings
1774                 if (!empty($item["allow_cid"] . $item["allow_gid"] . $item["deny_cid"] . $item["deny_gid"])) {
1775                         $item["private"] = self::PRIVATE;
1776                 }
1777
1778                 if ($notify) {
1779                         $item['edit'] = false;
1780                         $item['parent'] = $parent_id;
1781                         Hook::callAll('post_local', $item);
1782                         unset($item['edit']);
1783                         unset($item['parent']);
1784                 } else {
1785                         Hook::callAll('post_remote', $item);
1786                 }
1787
1788                 if (!empty($item['cancel'])) {
1789                         Logger::log('post cancelled by addon.');
1790                         return 0;
1791                 }
1792
1793                 if (empty($item['vid']) && !empty($item['verb'])) {
1794                         $item['vid'] = Verb::getID($item['verb']);
1795                 }
1796
1797                 // Creates or assigns the permission set
1798                 $item['psid'] = PermissionSet::getIdFromACL(
1799                         $item['uid'],
1800                         $item['allow_cid'],
1801                         $item['allow_gid'],
1802                         $item['deny_cid'],
1803                         $item['deny_gid']
1804                 );
1805
1806                 unset($item['allow_cid']);
1807                 unset($item['allow_gid']);
1808                 unset($item['deny_cid']);
1809                 unset($item['deny_gid']);
1810
1811                 // This array field is used to trigger some automatic reactions
1812                 // It is mainly used in the "post_local" hook.
1813                 unset($item['api_source']);
1814
1815                 // Filling item related side tables
1816                 if (!empty($item['dsprsig'])) {
1817                         $dsprsig = json_decode(base64_decode($item['dsprsig']));
1818
1819                         /*
1820                          * Friendica servers lower than 3.4.3-2 had double encoded the signature ...
1821                          * We can check for this condition when we decode and encode the stuff again.
1822                          */
1823                         if (base64_encode(base64_decode(base64_decode($dsprsig->signature))) == base64_decode($dsprsig->signature)) {
1824                                 $dsprsig->signature = base64_decode($dsprsig->signature);
1825                                 Logger::log("Repaired double encoded signature from handle ".$dsprsig->signer, Logger::DEBUG);
1826                         }
1827
1828                         if (!empty($dsprsig->signed_text) && empty($dsprsig->signature) && empty($dsprsig->signer)) {
1829                                 DBA::insert('diaspora-interaction', ['uri-id' => $item['uri-id'], 'interaction' => $dsprsig->signed_text], true);
1830                         }
1831                 }
1832
1833                 unset($item['dsprsig']);
1834
1835                 if (!empty($item['diaspora_signed_text'])) {
1836                         DBA::insert('diaspora-interaction', ['uri-id' => $item['uri-id'], 'interaction' => $item['diaspora_signed_text']], true);
1837                 }
1838
1839                 unset($item['diaspora_signed_text']);
1840
1841                 if (array_key_exists('file', $item) && !empty($item['file'])) {
1842                         Category::storeTextByURIId($item['uri-id'], $item['uid'], $item['file']);
1843                 }
1844
1845                 unset($item['file']);
1846
1847                 $delivery_data = Post\DeliveryData::extractFields($item);
1848                 unset($item['postopts']);
1849                 unset($item['inform']);
1850
1851                 // Check for hashtags in the body and repair or add hashtag links
1852                 self::setHashtags($item);
1853
1854                 // Store tags from the body if this hadn't been handled previously in the protocol classes
1855                 if (!Tag::existsForPost($item['uri-id'])) {
1856                         Tag::storeFromBody($item['uri-id'], $item['body']);
1857                 }
1858
1859                 // Fill the cache field
1860                 self::putInCache($item);
1861
1862                 if (stristr($item['verb'], Activity::POKE)) {
1863                         $notify_type = Delivery::POKE;
1864                 } else {
1865                         $notify_type = Delivery::POST;
1866                 }
1867
1868                 // We are doing this outside of the transaction to avoid timing problems
1869                 if (!self::insertActivity($item)) {
1870                         self::insertContent($item);
1871                 }
1872
1873                 $like_no_comment = DI::config()->get('system', 'like_no_comment');
1874
1875                 DBA::transaction();
1876                 $ret = DBA::insert('item', $item);
1877
1878                 // When the item was successfully stored we fetch the ID of the item.
1879                 if (DBA::isResult($ret)) {
1880                         $current_post = DBA::lastInsertId();
1881                 } else {
1882                         // This can happen - for example - if there are locking timeouts.
1883                         DBA::rollback();
1884
1885                         // Store the data into a spool file so that we can try again later.
1886                         self::spool($orig_item);
1887                         return 0;
1888                 }
1889
1890                 if ($current_post == 0) {
1891                         // This is one of these error messages that never should occur.
1892                         Logger::log("couldn't find created item - we better quit now.");
1893                         DBA::rollback();
1894                         return 0;
1895                 }
1896
1897                 // How much entries have we created?
1898                 // We wouldn't need this query when we could use an unique index - but MySQL has length problems with them.
1899                 $entries = DBA::count('item', ['uri' => $item['uri'], 'uid' => $item['uid'], 'network' => $item['network']]);
1900
1901                 if ($entries > 1) {
1902                         // There are duplicates. We delete our just created entry.
1903                         Logger::info('Delete duplicated item', ['id' => $current_post, 'uri' => $item['uri'], 'uid' => $item['uid'], 'guid' => $item['guid']]);
1904
1905                         // Yes, we could do a rollback here - but we possibly are still having users with MyISAM.
1906                         DBA::delete('item', ['id' => $current_post]);
1907                         DBA::commit();
1908                         return 0;
1909                 } elseif ($entries == 0) {
1910                         // This really should never happen since we quit earlier if there were problems.
1911                         Logger::log("Something is terribly wrong. We haven't found our created entry.");
1912                         DBA::rollback();
1913                         return 0;
1914                 }
1915
1916                 Logger::log('created item '.$current_post);
1917
1918                 if (!$parent_id || ($item['parent-uri'] === $item['uri'])) {
1919                         $parent_id = $current_post;
1920                 }
1921
1922                 // Set parent id
1923                 DBA::update('item', ['parent' => $parent_id], ['id' => $current_post]);
1924
1925                 $item['id'] = $current_post;
1926                 $item['parent'] = $parent_id;
1927
1928                 // update the commented timestamp on the parent
1929                 // Only update "commented" if it is really a comment
1930                 if (($item['gravity'] != GRAVITY_ACTIVITY) || !$like_no_comment) {
1931                         DBA::update('item', ['commented' => DateTimeFormat::utcNow(), 'changed' => DateTimeFormat::utcNow()], ['id' => $parent_id]);
1932                 } else {
1933                         DBA::update('item', ['changed' => DateTimeFormat::utcNow()], ['id' => $parent_id]);
1934                 }
1935
1936                 if ($item['parent-uri'] === $item['uri']) {
1937                         self::addThread($current_post);
1938                 } else {
1939                         self::updateThread($parent_id);
1940                 }
1941
1942                 if (!empty($item['origin']) || !empty($item['wall']) || !empty($delivery_data['postopts']) || !empty($delivery_data['inform'])) {
1943                         Post\DeliveryData::insert($item['uri-id'], $delivery_data);
1944                 }
1945
1946                 DBA::commit();
1947
1948                 // In that function we check if this is a forum post. Additionally we delete the item under certain circumstances
1949                 if (self::tagDeliver($item['uid'], $current_post)) {
1950                         // Get the user information for the logging
1951                         $user = User::getById($uid);
1952
1953                         Logger::notice('Item had been deleted', ['id' => $current_post, 'user' => $uid, 'account-type' => $user['account-type']]);
1954                         return 0;
1955                 }
1956
1957                 if (!$dontcache) {
1958                         $posted_item = self::selectFirst(self::ITEM_FIELDLIST, ['id' => $current_post]);
1959                         if (DBA::isResult($posted_item)) {
1960                                 if ($notify) {
1961                                         Hook::callAll('post_local_end', $posted_item);
1962                                 } else {
1963                                         Hook::callAll('post_remote_end', $posted_item);
1964                                 }
1965                         } else {
1966                                 Logger::log('new item not found in DB, id ' . $current_post);
1967                         }
1968                 }
1969
1970                 if ($item['parent-uri'] === $item['uri']) {
1971                         self::addShadow($current_post);
1972                 } else {
1973                         self::addShadowPost($current_post);
1974                 }
1975
1976                 self::updateContact($item);
1977
1978                 UserItem::setNotification($current_post);
1979
1980                 check_user_notification($current_post);
1981
1982                 $transmit = $notify || ($item['visible'] && ($parent_origin || $item['origin']));
1983
1984                 if ($transmit) {
1985                         $transmit_item = Item::selectFirst(['verb', 'origin'], ['id' => $item['id']]);
1986                         // Don't relay participation messages
1987                         if (($transmit_item['verb'] == Activity::FOLLOW) &&
1988                                 (!$transmit_item['origin'] || ($item['author-id'] != Contact::getPublicIdByUserId($uid)))) {
1989                                 Logger::info('Participation messages will not be relayed', ['item' => $item['id'], 'uri' => $item['uri'], 'verb' => $transmit_item['verb']]);
1990                                 $transmit = false;
1991                         }
1992                 }
1993
1994                 if ($transmit) {
1995                         Worker::add(['priority' => $priority, 'dont_fork' => true], 'Notifier', $notify_type, $current_post);
1996                 }
1997
1998                 return $current_post;
1999         }
2000
2001         /**
2002          * Insert a new item content entry
2003          *
2004          * @param array $item The item fields that are to be inserted
2005          * @return bool
2006          * @throws \Exception
2007          */
2008         private static function insertActivity(&$item)
2009         {
2010                 $activity_index = self::activityToIndex($item['verb']);
2011
2012                 if ($activity_index < 0) {
2013                         return false;
2014                 }
2015
2016                 $fields = ['activity' => $activity_index, 'uri-hash' => (string)$item['uri-id'], 'uri-id' => $item['uri-id']];
2017
2018                 // We just remove everything that is content
2019                 foreach (array_merge(self::CONTENT_FIELDLIST, self::MIXED_CONTENT_FIELDLIST) as $field) {
2020                         unset($item[$field]);
2021                 }
2022
2023                 // To avoid timing problems, we are using locks.
2024                 $locked = DI::lock()->acquire('item_insert_activity');
2025                 if (!$locked) {
2026                         Logger::log("Couldn't acquire lock for URI " . $item['uri'] . " - proceeding anyway.");
2027                 }
2028
2029                 // Do we already have this content?
2030                 $item_activity = DBA::selectFirst('item-activity', ['id'], ['uri-id' => $item['uri-id']]);
2031                 if (DBA::isResult($item_activity)) {
2032                         $item['iaid'] = $item_activity['id'];
2033                         Logger::log('Fetched activity for URI ' . $item['uri'] . ' (' . $item['iaid'] . ')');
2034                 } elseif (DBA::insert('item-activity', $fields)) {
2035                         $item['iaid'] = DBA::lastInsertId();
2036                         Logger::log('Inserted activity for URI ' . $item['uri'] . ' (' . $item['iaid'] . ')');
2037                 } else {
2038                         // This shouldn't happen.
2039                         Logger::log('Could not insert activity for URI ' . $item['uri'] . ' - should not happen');
2040                         DI::lock()->release('item_insert_activity');
2041                         return false;
2042                 }
2043                 if ($locked) {
2044                         DI::lock()->release('item_insert_activity');
2045                 }
2046                 return true;
2047         }
2048
2049         /**
2050          * Insert a new item content entry
2051          *
2052          * @param array $item The item fields that are to be inserted
2053          * @throws \Exception
2054          */
2055         private static function insertContent(&$item)
2056         {
2057                 $fields = ['uri-plink-hash' => (string)$item['uri-id'], 'uri-id' => $item['uri-id']];
2058
2059                 foreach (array_merge(self::CONTENT_FIELDLIST, self::MIXED_CONTENT_FIELDLIST) as $field) {
2060                         if (isset($item[$field])) {
2061                                 $fields[$field] = $item[$field];
2062                                 unset($item[$field]);
2063                         }
2064                 }
2065
2066                 // To avoid timing problems, we are using locks.
2067                 $locked = DI::lock()->acquire('item_insert_content');
2068                 if (!$locked) {
2069                         Logger::log("Couldn't acquire lock for URI " . $item['uri'] . " - proceeding anyway.");
2070                 }
2071
2072                 // Do we already have this content?
2073                 $item_content = DBA::selectFirst('item-content', ['id'], ['uri-id' => $item['uri-id']]);
2074                 if (DBA::isResult($item_content)) {
2075                         $item['icid'] = $item_content['id'];
2076                         Logger::log('Fetched content for URI ' . $item['uri'] . ' (' . $item['icid'] . ')');
2077                 } elseif (DBA::insert('item-content', $fields)) {
2078                         $item['icid'] = DBA::lastInsertId();
2079                         Logger::log('Inserted content for URI ' . $item['uri'] . ' (' . $item['icid'] . ')');
2080                 } else {
2081                         // This shouldn't happen.
2082                         Logger::log('Could not insert content for URI ' . $item['uri'] . ' - should not happen');
2083                 }
2084                 if ($locked) {
2085                         DI::lock()->release('item_insert_content');
2086                 }
2087         }
2088
2089         /**
2090          * Update existing item content entries
2091          *
2092          * @param array $item      The item fields that are to be changed
2093          * @param array $condition The condition for finding the item content entries
2094          * @return bool
2095          * @throws \Exception
2096          */
2097         private static function updateActivity($item, $condition)
2098         {
2099                 if (empty($item['verb'])) {
2100                         return false;
2101                 }
2102                 $activity_index = self::activityToIndex($item['verb']);
2103
2104                 if ($activity_index < 0) {
2105                         return false;
2106                 }
2107
2108                 $fields = ['activity' => $activity_index];
2109
2110                 Logger::log('Update activity for ' . json_encode($condition));
2111
2112                 DBA::update('item-activity', $fields, $condition, true);
2113
2114                 return true;
2115         }
2116
2117         /**
2118          * Update existing item content entries
2119          *
2120          * @param array $item      The item fields that are to be changed
2121          * @param array $condition The condition for finding the item content entries
2122          * @throws \Exception
2123          */
2124         private static function updateContent($item, $condition)
2125         {
2126                 // We have to select only the fields from the "item-content" table
2127                 $fields = [];
2128                 foreach (array_merge(self::CONTENT_FIELDLIST, self::MIXED_CONTENT_FIELDLIST) as $field) {
2129                         if (isset($item[$field])) {
2130                                 $fields[$field] = $item[$field];
2131                         }
2132                 }
2133
2134                 if (empty($fields)) {
2135                         // when there are no fields at all, just use the condition
2136                         // This is to ensure that we always store content.
2137                         $fields = $condition;
2138                 }
2139
2140                 Logger::log('Update content for ' . json_encode($condition));
2141
2142                 DBA::update('item-content', $fields, $condition, true);
2143         }
2144
2145         /**
2146          * Distributes public items to the receivers
2147          *
2148          * @param integer $itemid      Item ID that should be added
2149          * @param string  $signed_text Original text (for Diaspora signatures), JSON encoded.
2150          * @throws \Exception
2151          */
2152         public static function distribute($itemid, $signed_text = '')
2153         {
2154                 $condition = ["`id` IN (SELECT `parent` FROM `item` WHERE `id` = ?)", $itemid];
2155                 $parent = self::selectFirst(['owner-id'], $condition);
2156                 if (!DBA::isResult($parent)) {
2157                         return;
2158                 }
2159
2160                 // Only distribute public items from native networks
2161                 $condition = ['id' => $itemid, 'uid' => 0,
2162                         'network' => array_merge(Protocol::FEDERATED ,['']),
2163                         'visible' => true, 'deleted' => false, 'moderated' => false, 'private' => [self::PUBLIC, self::UNLISTED]];
2164                 $item = self::selectFirst(self::ITEM_FIELDLIST, $condition);
2165                 if (!DBA::isResult($item)) {
2166                         return;
2167                 }
2168
2169                 $origin = $item['origin'];
2170
2171                 unset($item['id']);
2172                 unset($item['parent']);
2173                 unset($item['mention']);
2174                 unset($item['wall']);
2175                 unset($item['origin']);
2176                 unset($item['starred']);
2177
2178                 $users = [];
2179
2180                 /// @todo add a field "pcid" in the contact table that referrs to the public contact id.
2181                 $owner = DBA::selectFirst('contact', ['url', 'nurl', 'alias'], ['id' => $parent['owner-id']]);
2182                 if (!DBA::isResult($owner)) {
2183                         return;
2184                 }
2185
2186                 $condition = ['nurl' => $owner['nurl'], 'rel' => [Contact::SHARING, Contact::FRIEND]];
2187                 $contacts = DBA::select('contact', ['uid'], $condition);
2188                 while ($contact = DBA::fetch($contacts)) {
2189                         if ($contact['uid'] == 0) {
2190                                 continue;
2191                         }
2192
2193                         $users[$contact['uid']] = $contact['uid'];
2194                 }
2195                 DBA::close($contacts);
2196
2197                 $condition = ['alias' => $owner['url'], 'rel' => [Contact::SHARING, Contact::FRIEND]];
2198                 $contacts = DBA::select('contact', ['uid'], $condition);
2199                 while ($contact = DBA::fetch($contacts)) {
2200                         if ($contact['uid'] == 0) {
2201                                 continue;
2202                         }
2203
2204                         $users[$contact['uid']] = $contact['uid'];
2205                 }
2206                 DBA::close($contacts);
2207
2208                 if (!empty($owner['alias'])) {
2209                         $condition = ['url' => $owner['alias'], 'rel' => [Contact::SHARING, Contact::FRIEND]];
2210                         $contacts = DBA::select('contact', ['uid'], $condition);
2211                         while ($contact = DBA::fetch($contacts)) {
2212                                 if ($contact['uid'] == 0) {
2213                                         continue;
2214                                 }
2215
2216                                 $users[$contact['uid']] = $contact['uid'];
2217                         }
2218                         DBA::close($contacts);
2219                 }
2220
2221                 $origin_uid = 0;
2222
2223                 if ($item['uri'] != $item['parent-uri']) {
2224                         $parents = self::select(['uid', 'origin'], ["`uri` = ? AND `uid` != 0", $item['parent-uri']]);
2225                         while ($parent = self::fetch($parents)) {
2226                                 $users[$parent['uid']] = $parent['uid'];
2227                                 if ($parent['origin'] && !$origin) {
2228                                         $origin_uid = $parent['uid'];
2229                                 }
2230                         }
2231                 }
2232
2233                 foreach ($users as $uid) {
2234                         if ($origin_uid == $uid) {
2235                                 $item['diaspora_signed_text'] = $signed_text;
2236                         }
2237                         self::storeForUser($itemid, $item, $uid);
2238                 }
2239         }
2240
2241         /**
2242          * Store public items for the receivers
2243          *
2244          * @param integer $itemid Item ID that should be added
2245          * @param array   $item   The item entry that will be stored
2246          * @param integer $uid    The user that will receive the item entry
2247          * @throws \Exception
2248          */
2249         private static function storeForUser($itemid, $item, $uid)
2250         {
2251                 $item['uid'] = $uid;
2252                 $item['origin'] = 0;
2253                 $item['wall'] = 0;
2254                 if ($item['uri'] == $item['parent-uri']) {
2255                         $item['contact-id'] = Contact::getIdForURL($item['owner-link'], $uid);
2256                 } else {
2257                         $item['contact-id'] = Contact::getIdForURL($item['author-link'], $uid);
2258                 }
2259
2260                 if (empty($item['contact-id'])) {
2261                         $self = DBA::selectFirst('contact', ['id'], ['self' => true, 'uid' => $uid]);
2262                         if (!DBA::isResult($self)) {
2263                                 return;
2264                         }
2265                         $item['contact-id'] = $self['id'];
2266                 }
2267
2268                 /// @todo Handling of "event-id"
2269
2270                 $notify = false;
2271                 if ($item['uri'] == $item['parent-uri']) {
2272                         $contact = DBA::selectFirst('contact', [], ['id' => $item['contact-id'], 'self' => false]);
2273                         if (DBA::isResult($contact)) {
2274                                 $notify = self::isRemoteSelf($contact, $item);
2275                         }
2276                 }
2277
2278                 $distributed = self::insert($item, $notify, true);
2279
2280                 if (!$distributed) {
2281                         Logger::log("Distributed public item " . $itemid . " for user " . $uid . " wasn't stored", Logger::DEBUG);
2282                 } else {
2283                         Logger::log("Distributed public item " . $itemid . " for user " . $uid . " with id " . $distributed, Logger::DEBUG);
2284                 }
2285         }
2286
2287         /**
2288          * Add a shadow entry for a given item id that is a thread starter
2289          *
2290          * We store every public item entry additionally with the user id "0".
2291          * This is used for the community page and for the search.
2292          * It is planned that in the future we will store public item entries only once.
2293          *
2294          * @param integer $itemid Item ID that should be added
2295          * @throws \Exception
2296          */
2297         public static function addShadow($itemid)
2298         {
2299                 $fields = ['uid', 'private', 'moderated', 'visible', 'deleted', 'network', 'uri'];
2300                 $condition = ['id' => $itemid, 'parent' => [0, $itemid]];
2301                 $item = self::selectFirst($fields, $condition);
2302
2303                 if (!DBA::isResult($item)) {
2304                         return;
2305                 }
2306
2307                 // is it already a copy?
2308                 if (($itemid == 0) || ($item['uid'] == 0)) {
2309                         return;
2310                 }
2311
2312                 // Is it a visible public post?
2313                 if (!$item["visible"] || $item["deleted"] || $item["moderated"] || ($item["private"] == Item::PRIVATE)) {
2314                         return;
2315                 }
2316
2317                 // is it an entry from a connector? Only add an entry for natively connected networks
2318                 if (!in_array($item["network"], array_merge(Protocol::FEDERATED ,['']))) {
2319                         return;
2320                 }
2321
2322                 if (self::exists(['uri' => $item['uri'], 'uid' => 0])) {
2323                         return;
2324                 }
2325
2326                 $item = self::selectFirst(self::ITEM_FIELDLIST, ['id' => $itemid]);
2327
2328                 if (DBA::isResult($item)) {
2329                         // Preparing public shadow (removing user specific data)
2330                         $item['uid'] = 0;
2331                         unset($item['id']);
2332                         unset($item['parent']);
2333                         unset($item['wall']);
2334                         unset($item['mention']);
2335                         unset($item['origin']);
2336                         unset($item['starred']);
2337                         unset($item['postopts']);
2338                         unset($item['inform']);
2339                         if ($item['uri'] == $item['parent-uri']) {
2340                                 $item['contact-id'] = $item['owner-id'];
2341                         } else {
2342                                 $item['contact-id'] = $item['author-id'];
2343                         }
2344
2345                         $public_shadow = self::insert($item, false, true);
2346
2347                         Logger::log("Stored public shadow for thread ".$itemid." under id ".$public_shadow, Logger::DEBUG);
2348                 }
2349         }
2350
2351         /**
2352          * Add a shadow entry for a given item id that is a comment
2353          *
2354          * This function does the same like the function above - but for comments
2355          *
2356          * @param integer $itemid Item ID that should be added
2357          * @throws \Exception
2358          */
2359         public static function addShadowPost($itemid)
2360         {
2361                 $item = self::selectFirst(self::ITEM_FIELDLIST, ['id' => $itemid]);
2362                 if (!DBA::isResult($item)) {
2363                         return;
2364                 }
2365
2366                 // Is it a toplevel post?
2367                 if ($item['id'] == $item['parent']) {
2368                         self::addShadow($itemid);
2369                         return;
2370                 }
2371
2372                 // Is this a shadow entry?
2373                 if ($item['uid'] == 0) {
2374                         return;
2375                 }
2376
2377                 // Is there a shadow parent?
2378                 if (!self::exists(['uri' => $item['parent-uri'], 'uid' => 0])) {
2379                         return;
2380                 }
2381
2382                 // Is there already a shadow entry?
2383                 if (self::exists(['uri' => $item['uri'], 'uid' => 0])) {
2384                         return;
2385                 }
2386
2387                 // Save "origin" and "parent" state
2388                 $origin = $item['origin'];
2389                 $parent = $item['parent'];
2390
2391                 // Preparing public shadow (removing user specific data)
2392                 $item['uid'] = 0;
2393                 unset($item['id']);
2394                 unset($item['parent']);
2395                 unset($item['wall']);
2396                 unset($item['mention']);
2397                 unset($item['origin']);
2398                 unset($item['starred']);
2399                 unset($item['postopts']);
2400                 unset($item['inform']);
2401                 $item['contact-id'] = Contact::getIdForURL($item['author-link']);
2402
2403                 $public_shadow = self::insert($item, false, true);
2404
2405                 Logger::log("Stored public shadow for comment ".$item['uri']." under id ".$public_shadow, Logger::DEBUG);
2406
2407                 // If this was a comment to a Diaspora post we don't get our comment back.
2408                 // This means that we have to distribute the comment by ourselves.
2409                 if ($origin && self::exists(['id' => $parent, 'network' => Protocol::DIASPORA])) {
2410                         self::distribute($public_shadow);
2411                 }
2412         }
2413
2414         /**
2415          * Adds a language specification in a "language" element of given $arr.
2416          * Expects "body" element to exist in $arr.
2417          *
2418          * @param $item
2419          * @throws \Text_LanguageDetect_Exception
2420          */
2421         private static function addLanguageToItemArray(&$item)
2422         {
2423                 $naked_body = BBCode::toPlaintext($item['body'], false);
2424
2425                 $ld = new Text_LanguageDetect();
2426                 $ld->setNameMode(2);
2427                 $languages = $ld->detect($naked_body, 3);
2428
2429                 if (is_array($languages)) {
2430                         $item['language'] = json_encode($languages);
2431                 }
2432         }
2433
2434         /**
2435          * Creates an unique guid out of a given uri
2436          *
2437          * @param string $uri uri of an item entry
2438          * @param string $host hostname for the GUID prefix
2439          * @return string unique guid
2440          */
2441         public static function guidFromUri($uri, $host)
2442         {
2443                 // Our regular guid routine is using this kind of prefix as well
2444                 // We have to avoid that different routines could accidentally create the same value
2445                 $parsed = parse_url($uri);
2446
2447                 // We use a hash of the hostname as prefix for the guid
2448                 $guid_prefix = hash("crc32", $host);
2449
2450                 // Remove the scheme to make sure that "https" and "http" doesn't make a difference
2451                 unset($parsed["scheme"]);
2452
2453                 // Glue it together to be able to make a hash from it
2454                 $host_id = implode("/", $parsed);
2455
2456                 // We could use any hash algorithm since it isn't a security issue
2457                 $host_hash = hash("ripemd128", $host_id);
2458
2459                 return $guid_prefix.$host_hash;
2460         }
2461
2462         /**
2463          * generate an unique URI
2464          *
2465          * @param integer $uid  User id
2466          * @param string  $guid An existing GUID (Otherwise it will be generated)
2467          *
2468          * @return string
2469          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
2470          */
2471         public static function newURI($uid, $guid = "")
2472         {
2473                 if ($guid == "") {
2474                         $guid = System::createUUID();
2475                 }
2476
2477                 return DI::baseUrl()->get() . '/objects/' . $guid;
2478         }
2479
2480         /**
2481          * Set "success_update" and "last-item" to the date of the last time we heard from this contact
2482          *
2483          * This can be used to filter for inactive contacts.
2484          * Only do this for public postings to avoid privacy problems, since poco data is public.
2485          * Don't set this value if it isn't from the owner (could be an author that we don't know)
2486          *
2487          * @param array $arr Contains the just posted item record
2488          * @throws \Exception
2489          */
2490         private static function updateContact($arr)
2491         {
2492                 // Unarchive the author
2493                 $contact = DBA::selectFirst('contact', [], ['id' => $arr["author-id"]]);
2494                 if (DBA::isResult($contact)) {
2495                         Contact::unmarkForArchival($contact);
2496                 }
2497
2498                 // Unarchive the contact if it's not our own contact
2499                 $contact = DBA::selectFirst('contact', [], ['id' => $arr["contact-id"], 'self' => false]);
2500                 if (DBA::isResult($contact)) {
2501                         Contact::unmarkForArchival($contact);
2502                 }
2503
2504                 /// @todo On private posts we could obfuscate the date
2505                 $update = ($arr['private'] != self::PRIVATE);
2506
2507                 // Is it a forum? Then we don't care about the rules from above
2508                 if (!$update && in_array($arr["network"], [Protocol::ACTIVITYPUB, Protocol::DFRN]) && ($arr["parent-uri"] === $arr["uri"])) {
2509                         if (DBA::exists('contact', ['id' => $arr['contact-id'], 'forum' => true])) {
2510                                 $update = true;
2511                         }
2512                 }
2513
2514                 if ($update) {
2515                         // The "self" contact id is used (for example in the connectors) when the contact is unknown
2516                         // So we have to ensure to only update the last item when it had been our own post,
2517                         // or it had been done by a "regular" contact.
2518                         if (!empty($arr['wall'])) {
2519                                 $condition = ['id' => $arr['contact-id']];
2520                         } else {
2521                                 $condition = ['id' => $arr['contact-id'], 'self' => false];
2522                         }
2523                         DBA::update('contact', ['success_update' => $arr['received'], 'last-item' => $arr['received']], $condition);
2524                 }
2525                 // Now do the same for the system wide contacts with uid=0
2526                 if ($arr['private'] != self::PRIVATE) {
2527                         DBA::update('contact', ['success_update' => $arr['received'], 'last-item' => $arr['received']],
2528                                 ['id' => $arr['owner-id']]);
2529
2530                         if ($arr['owner-id'] != $arr['author-id']) {
2531                                 DBA::update('contact', ['success_update' => $arr['received'], 'last-item' => $arr['received']],
2532                                         ['id' => $arr['author-id']]);
2533                         }
2534                 }
2535         }
2536
2537         public static function setHashtags(&$item)
2538         {
2539                 $tags = BBCode::getTags($item["body"]);
2540
2541                 // No hashtags?
2542                 if (!count($tags)) {
2543                         return false;
2544                 }
2545
2546                 // What happens in [code], stays in [code]!
2547                 // escape the # and the [
2548                 // hint: we will also get in trouble with #tags, when we want markdown in posts -> ### Headline 3
2549                 $item["body"] = preg_replace_callback("/\[code(.*?)\](.*?)\[\/code\]/ism",
2550                         function ($match) {
2551                                 // we truly ESCape all # and [ to prevent gettin weird tags in [code] blocks
2552                                 $find = ['#', '['];
2553                                 $replace = [chr(27).'sharp', chr(27).'leftsquarebracket'];
2554                                 return ("[code" . $match[1] . "]" . str_replace($find, $replace, $match[2]) . "[/code]");
2555                         }, $item["body"]);
2556
2557                 // This sorting is important when there are hashtags that are part of other hashtags
2558                 // Otherwise there could be problems with hashtags like #test and #test2
2559                 // Because of this we are sorting from the longest to the shortest tag.
2560                 usort($tags, function($a, $b) {
2561                         return strlen($b) <=> strlen($a);
2562                 });
2563
2564                 $URLSearchString = "^\[\]";
2565
2566                 // All hashtags should point to the home server if "local_tags" is activated
2567                 if (DI::config()->get('system', 'local_tags')) {
2568                         $item["body"] = preg_replace("/#\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",
2569                                         "#[url=".DI::baseUrl()."/search?tag=$2]$2[/url]", $item["body"]);
2570                 }
2571
2572                 // mask hashtags inside of url, bookmarks and attachments to avoid urls in urls
2573                 $item["body"] = preg_replace_callback("/\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",
2574                         function ($match) {
2575                                 return ("[url=" . str_replace("#", "&num;", $match[1]) . "]" . str_replace("#", "&num;", $match[2]) . "[/url]");
2576                         }, $item["body"]);
2577
2578                 $item["body"] = preg_replace_callback("/\[bookmark\=([$URLSearchString]*)\](.*?)\[\/bookmark\]/ism",
2579                         function ($match) {
2580                                 return ("[bookmark=" . str_replace("#", "&num;", $match[1]) . "]" . str_replace("#", "&num;", $match[2]) . "[/bookmark]");
2581                         }, $item["body"]);
2582
2583                 $item["body"] = preg_replace_callback("/\[attachment (.*)\](.*?)\[\/attachment\]/ism",
2584                         function ($match) {
2585                                 return ("[attachment " . str_replace("#", "&num;", $match[1]) . "]" . $match[2] . "[/attachment]");
2586                         }, $item["body"]);
2587
2588                 // Repair recursive urls
2589                 $item["body"] = preg_replace("/&num;\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",
2590                                 "&num;$2", $item["body"]);
2591
2592                 foreach ($tags as $tag) {
2593                         if ((strpos($tag, '#') !== 0) || strpos($tag, '[url=') || strlen($tag) < 2 || $tag[1] == '#') {
2594                                 continue;
2595                         }
2596
2597                         $basetag = str_replace('_',' ',substr($tag,1));
2598                         $newtag = '#[url=' . DI::baseUrl() . '/search?tag=' . $basetag . ']' . $basetag . '[/url]';
2599
2600                         $item["body"] = str_replace($tag, $newtag, $item["body"]);
2601                 }
2602
2603                 // Convert back the masked hashtags
2604                 $item["body"] = str_replace("&num;", "#", $item["body"]);
2605
2606                 // Remember! What happens in [code], stays in [code]
2607                 // roleback the # and [
2608                 $item["body"] = preg_replace_callback("/\[code(.*?)\](.*?)\[\/code\]/ism",
2609                         function ($match) {
2610                                 // we truly unESCape all sharp and leftsquarebracket
2611                                 $find = [chr(27).'sharp', chr(27).'leftsquarebracket'];
2612                                 $replace = ['#', '['];
2613                                 return ("[code" . $match[1] . "]" . str_replace($find, $replace, $match[2]) . "[/code]");
2614                         }, $item["body"]);
2615         }
2616
2617         /**
2618          * look for mention tags and setup a second delivery chain for forum/community posts if appropriate
2619          *
2620          * @param int $uid
2621          * @param int $item_id
2622          * @return boolean true if item was deleted, else false
2623          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
2624          * @throws \ImagickException
2625          */
2626         private static function tagDeliver($uid, $item_id)
2627         {
2628                 $mention = false;
2629
2630                 $user = DBA::selectFirst('user', [], ['uid' => $uid]);
2631                 if (!DBA::isResult($user)) {
2632                         return false;
2633                 }
2634
2635                 $community_page = (($user['page-flags'] == User::PAGE_FLAGS_COMMUNITY) ? true : false);
2636                 $prvgroup = (($user['page-flags'] == User::PAGE_FLAGS_PRVGROUP) ? true : false);
2637
2638                 $item = self::selectFirst(self::ITEM_FIELDLIST, ['id' => $item_id]);
2639                 if (!DBA::isResult($item)) {
2640                         return false;
2641                 }
2642
2643                 $link = Strings::normaliseLink(DI::baseUrl() . '/profile/' . $user['nickname']);
2644
2645                 /*
2646                  * Diaspora uses their own hardwired link URL in @-tags
2647                  * instead of the one we supply with webfinger
2648                  */
2649                 $dlink = Strings::normaliseLink(DI::baseUrl() . '/u/' . $user['nickname']);
2650
2651                 $cnt = preg_match_all('/[\@\!]\[url\=(.*?)\](.*?)\[\/url\]/ism', $item['body'], $matches, PREG_SET_ORDER);
2652                 if ($cnt) {
2653                         foreach ($matches as $mtch) {
2654                                 if (Strings::compareLink($link, $mtch[1]) || Strings::compareLink($dlink, $mtch[1])) {
2655                                         $mention = true;
2656                                         Logger::log('mention found: ' . $mtch[2]);
2657                                 }
2658                         }
2659                 }
2660
2661                 if (!$mention) {
2662                         if (($community_page || $prvgroup) &&
2663                                   !$item['wall'] && !$item['origin'] && ($item['id'] == $item['parent'])) {
2664                                 Logger::info('Delete private group/communiy top-level item without mention', ['id' => $item_id, 'guid'=> $item['guid']]);
2665                                 DBA::delete('item', ['id' => $item_id]);
2666                                 return true;
2667                         }
2668                         return false;
2669                 }
2670
2671                 $arr = ['item' => $item, 'user' => $user];
2672
2673                 Hook::callAll('tagged', $arr);
2674
2675                 if (!$community_page && !$prvgroup) {
2676                         return false;
2677                 }
2678
2679                 /*
2680                  * tgroup delivery - setup a second delivery chain
2681                  * prevent delivery looping - only proceed
2682                  * if the message originated elsewhere and is a top-level post
2683                  */
2684                 if ($item['wall'] || $item['origin'] || ($item['id'] != $item['parent'])) {
2685                         return false;
2686                 }
2687
2688                 // now change this copy of the post to a forum head message and deliver to all the tgroup members
2689                 $self = DBA::selectFirst('contact', ['id', 'name', 'url', 'thumb'], ['uid' => $uid, 'self' => true]);
2690                 if (!DBA::isResult($self)) {
2691                         return false;
2692                 }
2693
2694                 $owner_id = Contact::getIdForURL($self['url']);
2695
2696                 // also reset all the privacy bits to the forum default permissions
2697
2698                 $private = ($user['allow_cid'] || $user['allow_gid'] || $user['deny_cid'] || $user['deny_gid']) ? self::PRIVATE : self::PUBLIC;
2699
2700                 $psid = PermissionSet::getIdFromACL(
2701                         $user['uid'],
2702                         $user['allow_cid'],
2703                         $user['allow_gid'],
2704                         $user['deny_cid'],
2705                         $user['deny_gid']
2706                 );
2707
2708                 $forum_mode = ($prvgroup ? 2 : 1);
2709
2710                 $fields = ['wall' => true, 'origin' => true, 'forum_mode' => $forum_mode, 'contact-id' => $self['id'],
2711                         'owner-id' => $owner_id, 'private' => $private, 'psid' => $psid];
2712                 self::update($fields, ['id' => $item_id]);
2713
2714                 self::updateThread($item_id);
2715
2716                 Worker::add(['priority' => PRIORITY_HIGH, 'dont_fork' => true], 'Notifier', Delivery::POST, $item_id);
2717
2718                 return false;
2719         }
2720
2721         public static function isRemoteSelf($contact, &$datarray)
2722         {
2723                 if (!$contact['remote_self']) {
2724                         return false;
2725                 }
2726
2727                 // Prevent the forwarding of posts that are forwarded
2728                 if (!empty($datarray["extid"]) && ($datarray["extid"] == Protocol::DFRN)) {
2729                         Logger::log('Already forwarded', Logger::DEBUG);
2730                         return false;
2731                 }
2732
2733                 // Prevent to forward already forwarded posts
2734                 if ($datarray["app"] == DI::baseUrl()->getHostname()) {
2735                         Logger::log('Already forwarded (second test)', Logger::DEBUG);
2736                         return false;
2737                 }
2738
2739                 // Only forward posts
2740                 if ($datarray["verb"] != Activity::POST) {
2741                         Logger::log('No post', Logger::DEBUG);
2742                         return false;
2743                 }
2744
2745                 if (($contact['network'] != Protocol::FEED) && ($datarray['private'] == self::PRIVATE)) {
2746                         Logger::log('Not public', Logger::DEBUG);
2747                         return false;
2748                 }
2749
2750                 $datarray2 = $datarray;
2751                 Logger::log('remote-self start - Contact '.$contact['url'].' - '.$contact['remote_self'].' Item '.print_r($datarray, true), Logger::DEBUG);
2752                 if ($contact['remote_self'] == 2) {
2753                         $self = DBA::selectFirst('contact', ['id', 'name', 'url', 'thumb'],
2754                                         ['uid' => $contact['uid'], 'self' => true]);
2755                         if (DBA::isResult($self)) {
2756                                 $datarray['contact-id'] = $self["id"];
2757
2758                                 $datarray['owner-name'] = $self["name"];
2759                                 $datarray['owner-link'] = $self["url"];
2760                                 $datarray['owner-avatar'] = $self["thumb"];
2761
2762                                 $datarray['author-name']   = $datarray['owner-name'];
2763                                 $datarray['author-link']   = $datarray['owner-link'];
2764                                 $datarray['author-avatar'] = $datarray['owner-avatar'];
2765
2766                                 unset($datarray['edited']);
2767
2768                                 unset($datarray['network']);
2769                                 unset($datarray['owner-id']);
2770                                 unset($datarray['author-id']);
2771                         }
2772
2773                         if ($contact['network'] != Protocol::FEED) {
2774                                 $datarray["guid"] = System::createUUID();
2775                                 unset($datarray["plink"]);
2776                                 $datarray["uri"] = self::newURI($contact['uid'], $datarray["guid"]);
2777                                 $datarray["parent-uri"] = $datarray["uri"];
2778                                 $datarray["thr-parent"] = $datarray["uri"];
2779                                 $datarray["extid"] = Protocol::DFRN;
2780                                 $urlpart = parse_url($datarray2['author-link']);
2781                                 $datarray["app"] = $urlpart["host"];
2782                         } else {
2783                                 $datarray['private'] = self::PUBLIC;
2784                         }
2785                 }
2786
2787                 if ($contact['network'] != Protocol::FEED) {
2788                         // Store the original post
2789                         $result = self::insert($datarray2);
2790                         Logger::log('remote-self post original item - Contact '.$contact['url'].' return '.$result.' Item '.print_r($datarray2, true), Logger::DEBUG);
2791                 } else {
2792                         $datarray["app"] = "Feed";
2793                         $result = true;
2794                 }
2795
2796                 // Trigger automatic reactions for addons
2797                 $datarray['api_source'] = true;
2798
2799                 // We have to tell the hooks who we are - this really should be improved
2800                 $_SESSION["authenticated"] = true;
2801                 $_SESSION["uid"] = $contact['uid'];
2802
2803                 return $result;
2804         }
2805
2806         /**
2807          *
2808          * @param string $s
2809          * @param int    $uid
2810          * @param array  $item
2811          * @param int    $cid
2812          * @return string
2813          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
2814          * @throws \ImagickException
2815          */
2816         public static function fixPrivatePhotos($s, $uid, $item = null, $cid = 0)
2817         {
2818                 if (DI::config()->get('system', 'disable_embedded')) {
2819                         return $s;
2820                 }
2821
2822                 Logger::log('check for photos', Logger::DEBUG);
2823                 $site = substr(DI::baseUrl(), strpos(DI::baseUrl(), '://'));
2824
2825                 $orig_body = $s;
2826                 $new_body = '';
2827
2828                 $img_start = strpos($orig_body, '[img');
2829                 $img_st_close = ($img_start !== false ? strpos(substr($orig_body, $img_start), ']') : false);
2830                 $img_len = ($img_start !== false ? strpos(substr($orig_body, $img_start + $img_st_close + 1), '[/img]') : false);
2831
2832                 while (($img_st_close !== false) && ($img_len !== false)) {
2833                         $img_st_close++; // make it point to AFTER the closing bracket
2834                         $image = substr($orig_body, $img_start + $img_st_close, $img_len);
2835
2836                         Logger::log('found photo ' . $image, Logger::DEBUG);
2837
2838                         if (stristr($image, $site . '/photo/')) {
2839                                 // Only embed locally hosted photos
2840                                 $replace = false;
2841                                 $i = basename($image);
2842                                 $i = str_replace(['.jpg', '.png', '.gif'], ['', '', ''], $i);
2843                                 $x = strpos($i, '-');
2844
2845                                 if ($x) {
2846                                         $res = substr($i, $x + 1);
2847                                         $i = substr($i, 0, $x);
2848                                         $photo = Photo::getPhotoForUser($uid, $i, $res);
2849                                         if (DBA::isResult($photo)) {
2850                                                 /*
2851                                                  * Check to see if we should replace this photo link with an embedded image
2852                                                  * 1. No need to do so if the photo is public
2853                                                  * 2. If there's a contact-id provided, see if they're in the access list
2854                                                  *    for the photo. If so, embed it.
2855                                                  * 3. Otherwise, if we have an item, see if the item permissions match the photo
2856                                                  *    permissions, regardless of order but first check to see if they're an exact
2857                                                  *    match to save some processing overhead.
2858                                                  */
2859                                                 if (self::hasPermissions($photo)) {
2860                                                         if ($cid) {
2861                                                                 $recips = self::enumeratePermissions($photo);
2862                                                                 if (in_array($cid, $recips)) {
2863                                                                         $replace = true;
2864                                                                 }
2865                                                         } elseif ($item) {
2866                                                                 if (self::samePermissions($uid, $item, $photo)) {
2867                                                                         $replace = true;
2868                                                                 }
2869                                                         }
2870                                                 }
2871                                                 if ($replace) {
2872                                                         $photo_img = Photo::getImageForPhoto($photo);
2873                                                         // If a custom width and height were specified, apply before embedding
2874                                                         if (preg_match("/\[img\=([0-9]*)x([0-9]*)\]/is", substr($orig_body, $img_start, $img_st_close), $match)) {
2875                                                                 Logger::log('scaling photo', Logger::DEBUG);
2876
2877                                                                 $width = intval($match[1]);
2878                                                                 $height = intval($match[2]);
2879
2880                                                                 $photo_img->scaleDown(max($width, $height));
2881                                                         }
2882
2883                                                         $data = $photo_img->asString();
2884                                                         $type = $photo_img->getType();
2885
2886                                                         Logger::log('replacing photo', Logger::DEBUG);
2887                                                         $image = 'data:' . $type . ';base64,' . base64_encode($data);
2888                                                         Logger::log('replaced: ' . $image, Logger::DATA);
2889                                                 }
2890                                         }
2891                                 }
2892                         }
2893
2894                         $new_body = $new_body . substr($orig_body, 0, $img_start + $img_st_close) . $image . '[/img]';
2895                         $orig_body = substr($orig_body, $img_start + $img_st_close + $img_len + strlen('[/img]'));
2896                         if ($orig_body === false) {
2897                                 $orig_body = '';
2898                         }
2899
2900                         $img_start = strpos($orig_body, '[img');
2901                         $img_st_close = ($img_start !== false ? strpos(substr($orig_body, $img_start), ']') : false);
2902                         $img_len = ($img_start !== false ? strpos(substr($orig_body, $img_start + $img_st_close + 1), '[/img]') : false);
2903                 }
2904
2905                 $new_body = $new_body . $orig_body;
2906
2907                 return $new_body;
2908         }
2909
2910         private static function hasPermissions($obj)
2911         {
2912                 return !empty($obj['allow_cid']) || !empty($obj['allow_gid']) ||
2913                         !empty($obj['deny_cid']) || !empty($obj['deny_gid']);
2914         }
2915
2916         private static function samePermissions($uid, $obj1, $obj2)
2917         {
2918                 // first part is easy. Check that these are exactly the same.
2919                 if (($obj1['allow_cid'] == $obj2['allow_cid'])
2920                         && ($obj1['allow_gid'] == $obj2['allow_gid'])
2921                         && ($obj1['deny_cid'] == $obj2['deny_cid'])
2922                         && ($obj1['deny_gid'] == $obj2['deny_gid'])) {
2923                         return true;
2924                 }
2925
2926                 // This is harder. Parse all the permissions and compare the resulting set.
2927                 $recipients1 = self::enumeratePermissions($obj1);
2928                 $recipients2 = self::enumeratePermissions($obj2);
2929                 sort($recipients1);
2930                 sort($recipients2);
2931
2932                 /// @TODO Comparison of arrays, maybe use array_diff_assoc() here?
2933                 return ($recipients1 == $recipients2);
2934         }
2935
2936         /**
2937          * Returns an array of contact-ids that are allowed to see this object
2938          *
2939          * @param array $obj        Item array with at least uid, allow_cid, allow_gid, deny_cid and deny_gid
2940          * @param bool  $check_dead Prunes unavailable contacts from the result
2941          * @return array
2942          * @throws \Exception
2943          */
2944         public static function enumeratePermissions(array $obj, bool $check_dead = false)
2945         {
2946                 $aclFormater = DI::aclFormatter();
2947
2948                 $allow_people = $aclFormater->expand($obj['allow_cid']);
2949                 $allow_groups = Group::expand($obj['uid'], $aclFormater->expand($obj['allow_gid']), $check_dead);
2950                 $deny_people  = $aclFormater->expand($obj['deny_cid']);
2951                 $deny_groups  = Group::expand($obj['uid'], $aclFormater->expand($obj['deny_gid']), $check_dead);
2952                 $recipients   = array_unique(array_merge($allow_people, $allow_groups));
2953                 $deny         = array_unique(array_merge($deny_people, $deny_groups));
2954                 $recipients   = array_diff($recipients, $deny);
2955                 return $recipients;
2956         }
2957
2958         public static function expire($uid, $days, $network = "", $force = false)
2959         {
2960                 if (!$uid || ($days < 1)) {
2961                         return;
2962                 }
2963
2964                 $condition = ["`uid` = ? AND NOT `deleted` AND `id` = `parent` AND `gravity` = ?",
2965                         $uid, GRAVITY_PARENT];
2966
2967                 /*
2968                  * $expire_network_only = save your own wall posts
2969                  * and just expire conversations started by others
2970                  */
2971                 $expire_network_only = DI::pConfig()->get($uid, 'expire', 'network_only', false);
2972
2973                 if ($expire_network_only) {
2974                         $condition[0] .= " AND NOT `wall`";
2975                 }
2976
2977                 if ($network != "") {
2978                         $condition[0] .= " AND `network` = ?";
2979                         $condition[] = $network;
2980                 }
2981
2982                 $condition[0] .= " AND `received` < UTC_TIMESTAMP() - INTERVAL ? DAY";
2983                 $condition[] = $days;
2984
2985                 $items = self::select(['file', 'resource-id', 'starred', 'type', 'id', 'post-type'], $condition);
2986
2987                 if (!DBA::isResult($items)) {
2988                         return;
2989                 }
2990
2991                 $expire_items = DI::pConfig()->get($uid, 'expire', 'items', true);
2992
2993                 // Forcing expiring of items - but not notes and marked items
2994                 if ($force) {
2995                         $expire_items = true;
2996                 }
2997
2998                 $expire_notes = DI::pConfig()->get($uid, 'expire', 'notes', true);
2999                 $expire_starred = DI::pConfig()->get($uid, 'expire', 'starred', true);
3000                 $expire_photos = DI::pConfig()->get($uid, 'expire', 'photos', false);
3001
3002                 $expired = 0;
3003
3004                 while ($item = Item::fetch($items)) {
3005                         // don't expire filed items
3006
3007                         if (strpos($item['file'], '[') !== false) {
3008                                 continue;
3009                         }
3010
3011                         // Only expire posts, not photos and photo comments
3012
3013                         if (!$expire_photos && strlen($item['resource-id'])) {
3014                                 continue;
3015                         } elseif (!$expire_starred && intval($item['starred'])) {
3016                                 continue;
3017                         } elseif (!$expire_notes && (($item['type'] == 'note') || ($item['post-type'] == Item::PT_PERSONAL_NOTE))) {
3018                                 continue;
3019                         } elseif (!$expire_items && ($item['type'] != 'note') && ($item['post-type'] != Item::PT_PERSONAL_NOTE)) {
3020                                 continue;
3021                         }
3022
3023                         self::markForDeletionById($item['id'], PRIORITY_LOW);
3024
3025                         ++$expired;
3026                 }
3027                 DBA::close($items);
3028                 Logger::log('User ' . $uid . ": expired $expired items; expire items: $expire_items, expire notes: $expire_notes, expire starred: $expire_starred, expire photos: $expire_photos");
3029         }
3030
3031         public static function firstPostDate($uid, $wall = false)
3032         {
3033                 $condition = ['uid' => $uid, 'wall' => $wall, 'deleted' => false, 'visible' => true, 'moderated' => false];
3034                 $params = ['order' => ['received' => false]];
3035                 $thread = DBA::selectFirst('thread', ['received'], $condition, $params);
3036                 if (DBA::isResult($thread)) {
3037                         return substr(DateTimeFormat::local($thread['received']), 0, 10);
3038                 }
3039                 return false;
3040         }
3041
3042         /**
3043          * add/remove activity to an item
3044          *
3045          * Toggle activities as like,dislike,attend of an item
3046          *
3047          * @param string $item_id
3048          * @param string $verb
3049          *            Activity verb. One of
3050          *            like, unlike, dislike, undislike, attendyes, unattendyes,
3051          *            attendno, unattendno, attendmaybe, unattendmaybe
3052          * @return bool
3053          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
3054          * @throws \ImagickException
3055          * @hook  'post_local_end'
3056          *            array $arr
3057          *            'post_id' => ID of posted item
3058          */
3059         public static function performActivity($item_id, $verb)
3060         {
3061                 if (!Session::isAuthenticated()) {
3062                         return false;
3063                 }
3064
3065                 switch ($verb) {
3066                         case 'like':
3067                         case 'unlike':
3068                                 $activity = Activity::LIKE;
3069                                 break;
3070                         case 'dislike':
3071                         case 'undislike':
3072                                 $activity = Activity::DISLIKE;
3073                                 break;
3074                         case 'attendyes':
3075                         case 'unattendyes':
3076                                 $activity = Activity::ATTEND;
3077                                 break;
3078                         case 'attendno':
3079                         case 'unattendno':
3080                                 $activity = Activity::ATTENDNO;
3081                                 break;
3082                         case 'attendmaybe':
3083                         case 'unattendmaybe':
3084                                 $activity = Activity::ATTENDMAYBE;
3085                                 break;
3086                         case 'follow':
3087                         case 'unfollow':
3088                                 $activity = Activity::FOLLOW;
3089                                 break;
3090                         default:
3091                                 Logger::log('like: unknown verb ' . $verb . ' for item ' . $item_id);
3092                                 return false;
3093                 }
3094
3095                 // Enable activity toggling instead of on/off
3096                 $event_verb_flag = $activity === Activity::ATTEND || $activity === Activity::ATTENDNO || $activity === Activity::ATTENDMAYBE;
3097
3098                 Logger::log('like: verb ' . $verb . ' item ' . $item_id);
3099
3100                 $item = self::selectFirst(self::ITEM_FIELDLIST, ['`id` = ? OR `uri` = ?', $item_id, $item_id]);
3101                 if (!DBA::isResult($item)) {
3102                         Logger::log('like: unknown item ' . $item_id);
3103                         return false;
3104                 }
3105
3106                 $item_uri = $item['uri'];
3107
3108                 $uid = $item['uid'];
3109                 if (($uid == 0) && local_user()) {
3110                         $uid = local_user();
3111                 }
3112
3113                 if (!Security::canWriteToUserWall($uid)) {
3114                         Logger::log('like: unable to write on wall ' . $uid);
3115                         return false;
3116                 }
3117
3118                 // Retrieves the local post owner
3119                 $owner_self_contact = DBA::selectFirst('contact', [], ['uid' => $uid, 'self' => true]);
3120                 if (!DBA::isResult($owner_self_contact)) {
3121                         Logger::log('like: unknown owner ' . $uid);
3122                         return false;
3123                 }
3124
3125                 // Retrieve the current logged in user's public contact
3126                 $author_id = public_contact();
3127
3128                 $author_contact = DBA::selectFirst('contact', ['url'], ['id' => $author_id]);
3129                 if (!DBA::isResult($author_contact)) {
3130                         Logger::log('like: unknown author ' . $author_id);
3131                         return false;
3132                 }
3133
3134                 // Contact-id is the uid-dependant author contact
3135                 if (local_user() == $uid) {
3136                         $item_contact_id = $owner_self_contact['id'];
3137                 } else {
3138                         $item_contact_id = Contact::getIdForURL($author_contact['url'], $uid, true);
3139                         $item_contact = DBA::selectFirst('contact', [], ['id' => $item_contact_id]);
3140                         if (!DBA::isResult($item_contact)) {
3141                                 Logger::log('like: unknown item contact ' . $item_contact_id);
3142                                 return false;
3143                         }
3144                 }
3145
3146                 // Look for an existing verb row
3147                 // event participation are essentially radio toggles. If you make a subsequent choice,
3148                 // we need to eradicate your first choice.
3149                 if ($event_verb_flag) {
3150                         $verbs = [Activity::ATTEND, Activity::ATTENDNO, Activity::ATTENDMAYBE];
3151
3152                         // Translate to the index based activity index
3153                         $activities = [];
3154                         foreach ($verbs as $verb) {
3155                                 $activities[] = self::activityToIndex($verb);
3156                         }
3157                 } else {
3158                         $activities = self::activityToIndex($activity);
3159                 }
3160
3161                 $condition = ['activity' => $activities, 'deleted' => false, 'gravity' => GRAVITY_ACTIVITY,
3162                         'author-id' => $author_id, 'uid' => $item['uid'], 'thr-parent' => $item_uri];
3163
3164                 $like_item = self::selectFirst(['id', 'guid', 'verb'], $condition);
3165
3166                 // If it exists, mark it as deleted
3167                 if (DBA::isResult($like_item)) {
3168                         self::markForDeletionById($like_item['id']);
3169
3170                         if (!$event_verb_flag || $like_item['verb'] == $activity) {
3171                                 return true;
3172                         }
3173                 }
3174
3175                 // Verb is "un-something", just trying to delete existing entries
3176                 if (strpos($verb, 'un') === 0) {
3177                         return true;
3178                 }
3179
3180                 $objtype = $item['resource-id'] ? Activity\ObjectType::IMAGE : Activity\ObjectType::NOTE;
3181
3182                 $new_item = [
3183                         'guid'          => System::createUUID(),
3184                         'uri'           => self::newURI($item['uid']),
3185                         'uid'           => $item['uid'],
3186                         'contact-id'    => $item_contact_id,
3187                         'wall'          => $item['wall'],
3188                         'origin'        => 1,
3189                         'network'       => Protocol::DFRN,
3190                         'gravity'       => GRAVITY_ACTIVITY,
3191                         'parent'        => $item['id'],
3192                         'parent-uri'    => $item['uri'],
3193                         'thr-parent'    => $item['uri'],
3194                         'owner-id'      => $author_id,
3195                         'author-id'     => $author_id,
3196                         'body'          => $activity,
3197                         'verb'          => $activity,
3198                         'object-type'   => $objtype,
3199                         'allow_cid'     => $item['allow_cid'],
3200                         'allow_gid'     => $item['allow_gid'],
3201                         'deny_cid'      => $item['deny_cid'],
3202                         'deny_gid'      => $item['deny_gid'],
3203                         'visible'       => 1,
3204                         'unseen'        => 1,
3205                 ];
3206
3207                 $signed = Diaspora::createLikeSignature($uid, $new_item);
3208                 if (!empty($signed)) {
3209                         $new_item['diaspora_signed_text'] = json_encode($signed);
3210                 }
3211
3212                 $new_item_id = self::insert($new_item);
3213
3214                 // If the parent item isn't visible then set it to visible
3215                 if (!$item['visible']) {
3216                         self::update(['visible' => true], ['id' => $item['id']]);
3217                 }
3218
3219                 $new_item['id'] = $new_item_id;
3220
3221                 Hook::callAll('post_local_end', $new_item);
3222
3223                 return true;
3224         }
3225
3226         private static function addThread($itemid, $onlyshadow = false)
3227         {
3228                 $fields = ['uid', 'created', 'edited', 'commented', 'received', 'changed', 'wall', 'private', 'pubmail',
3229                         'moderated', 'visible', 'starred', 'contact-id', 'post-type',
3230                         'deleted', 'origin', 'forum_mode', 'mention', 'network', 'author-id', 'owner-id'];
3231                 $condition = ["`id` = ? AND (`parent` = ? OR `parent` = 0)", $itemid, $itemid];
3232                 $item = self::selectFirst($fields, $condition);
3233
3234                 if (!DBA::isResult($item)) {
3235                         return;
3236                 }
3237
3238                 $item['iid'] = $itemid;
3239
3240                 if (!$onlyshadow) {
3241                         $result = DBA::insert('thread', $item);
3242
3243                         Logger::log("Add thread for item ".$itemid." - ".print_r($result, true), Logger::DEBUG);
3244                 }
3245         }
3246
3247         private static function updateThread($itemid, $setmention = false)
3248         {
3249                 $fields = ['uid', 'guid', 'created', 'edited', 'commented', 'received', 'changed', 'post-type',
3250                         'wall', 'private', 'pubmail', 'moderated', 'visible', 'starred', 'contact-id',
3251                         'deleted', 'origin', 'forum_mode', 'network', 'author-id', 'owner-id'];
3252                 $condition = ["`id` = ? AND (`parent` = ? OR `parent` = 0)", $itemid, $itemid];
3253
3254                 $item = self::selectFirst($fields, $condition);
3255                 if (!DBA::isResult($item)) {
3256                         return;
3257                 }
3258
3259                 if ($setmention) {
3260                         $item["mention"] = 1;
3261                 }
3262
3263                 $fields = [];
3264
3265                 foreach ($item as $field => $data) {
3266                         if (!in_array($field, ["guid"])) {
3267                                 $fields[$field] = $data;
3268                         }
3269                 }
3270
3271                 $result = DBA::update('thread', $fields, ['iid' => $itemid]);
3272
3273                 Logger::log("Update thread for item ".$itemid." - guid ".$item["guid"]." - ".(int)$result, Logger::DEBUG);
3274         }
3275
3276         private static function deleteThread($itemid, $itemuri = "")
3277         {
3278                 $item = DBA::selectFirst('thread', ['uid'], ['iid' => $itemid]);
3279                 if (!DBA::isResult($item)) {
3280                         Logger::log('No thread found for id '.$itemid, Logger::DEBUG);
3281                         return;
3282                 }
3283
3284                 $result = DBA::delete('thread', ['iid' => $itemid], ['cascade' => false]);
3285
3286                 Logger::log("deleteThread: Deleted thread for item ".$itemid." - ".print_r($result, true), Logger::DEBUG);
3287
3288                 if ($itemuri != "") {
3289                         $condition = ["`uri` = ? AND NOT `deleted` AND NOT (`uid` IN (?, 0))", $itemuri, $item["uid"]];
3290                         if (!self::exists($condition)) {
3291                                 DBA::delete('item', ['uri' => $itemuri, 'uid' => 0]);
3292                                 Logger::debug('Deleted shadow item', ['id' => $itemid, 'uri' => $itemuri]);
3293                         }
3294                 }
3295         }
3296
3297         public static function getPermissionsSQLByUserId($owner_id)
3298         {
3299                 $local_user = local_user();
3300                 $remote_user = Session::getRemoteContactID($owner_id);
3301
3302                 /*
3303                  * Construct permissions
3304                  *
3305                  * default permissions - anonymous user
3306                  */
3307                 $sql = sprintf(" AND `item`.`private` != %d", self::PRIVATE);
3308
3309                 // Profile owner - everything is visible
3310                 if ($local_user && ($local_user == $owner_id)) {
3311                         $sql = '';
3312                 } elseif ($remote_user) {
3313                         /*
3314                          * Authenticated visitor. Unless pre-verified,
3315                          * check that the contact belongs to this $owner_id
3316                          * and load the groups the visitor belongs to.
3317                          * If pre-verified, the caller is expected to have already
3318                          * done this and passed the groups into this function.
3319                          */
3320                         $set = PermissionSet::get($owner_id, $remote_user);
3321
3322                         if (!empty($set)) {
3323                                 $sql_set = sprintf(" OR (`item`.`private` = %d AND `item`.`wall` AND `item`.`psid` IN (", self::PRIVATE) . implode(',', $set) . "))";
3324                         } else {
3325                                 $sql_set = '';
3326                         }
3327
3328                         $sql = sprintf(" AND (`item`.`private` != %d", self::PRIVATE) . $sql_set . ")";
3329                 }
3330
3331                 return $sql;
3332         }
3333
3334         /**
3335          * get translated item type
3336          *
3337          * @param $item
3338          * @return string
3339          */
3340         public static function postType($item)
3341         {
3342                 if (!empty($item['event-id'])) {
3343                         return DI::l10n()->t('event');
3344                 } elseif (!empty($item['resource-id'])) {
3345                         return DI::l10n()->t('photo');
3346                 } elseif (!empty($item['verb']) && $item['verb'] !== Activity::POST) {
3347                         return DI::l10n()->t('activity');
3348                 } elseif ($item['id'] != $item['parent']) {
3349                         return DI::l10n()->t('comment');
3350                 }
3351
3352                 return DI::l10n()->t('post');
3353         }
3354
3355         /**
3356          * Sets the "rendered-html" field of the provided item
3357          *
3358          * Body is preserved to avoid side-effects as we modify it just-in-time for spoilers and private image links
3359          *
3360          * @param array $item
3361          * @param bool  $update
3362          *
3363          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
3364          * @todo Remove reference, simply return "rendered-html" and "rendered-hash"
3365          */
3366         public static function putInCache(&$item, $update = false)
3367         {
3368                 $body = $item["body"];
3369
3370                 $rendered_hash = $item['rendered-hash'] ?? '';
3371                 $rendered_html = $item['rendered-html'] ?? '';
3372
3373                 if ($rendered_hash == ''
3374                         || $rendered_html == ""
3375                         || $rendered_hash != hash("md5", $item["body"])
3376                         || DI::config()->get("system", "ignore_cache")
3377                 ) {
3378                         self::addRedirToImageTags($item);
3379
3380                         $item["rendered-html"] = BBCode::convert($item["body"]);
3381                         $item["rendered-hash"] = hash("md5", $item["body"]);
3382
3383                         $hook_data = ['item' => $item, 'rendered-html' => $item['rendered-html'], 'rendered-hash' => $item['rendered-hash']];
3384                         Hook::callAll('put_item_in_cache', $hook_data);
3385                         $item['rendered-html'] = $hook_data['rendered-html'];
3386                         $item['rendered-hash'] = $hook_data['rendered-hash'];
3387                         unset($hook_data);
3388
3389                         // Force an update if the generated values differ from the existing ones
3390                         if ($rendered_hash != $item["rendered-hash"]) {
3391                                 $update = true;
3392                         }
3393
3394                         // Only compare the HTML when we forcefully ignore the cache
3395                         if (DI::config()->get("system", "ignore_cache") && ($rendered_html != $item["rendered-html"])) {
3396                                 $update = true;
3397                         }
3398
3399                         if ($update && !empty($item["id"])) {
3400                                 self::update(
3401                                         [
3402                                                 'rendered-html' => $item["rendered-html"],
3403                                                 'rendered-hash' => $item["rendered-hash"]
3404                                         ],
3405                                         ['id' => $item["id"]]
3406                                 );
3407                         }
3408                 }
3409
3410                 $item["body"] = $body;
3411         }
3412
3413         /**
3414          * Find any non-embedded images in private items and add redir links to them
3415          *
3416          * @param array &$item The field array of an item row
3417          */
3418         private static function addRedirToImageTags(array &$item)
3419         {
3420                 $app = DI::app();
3421
3422                 $matches = [];
3423                 $cnt = preg_match_all('|\[img\](http[^\[]*?/photo/[a-fA-F0-9]+?(-[0-9]\.[\w]+?)?)\[\/img\]|', $item['body'], $matches, PREG_SET_ORDER);
3424                 if ($cnt) {
3425                         foreach ($matches as $mtch) {
3426                                 if (strpos($mtch[1], '/redir') !== false) {
3427                                         continue;
3428                                 }
3429
3430                                 if ((local_user() == $item['uid']) && ($item['private'] == self::PRIVATE) && ($item['contact-id'] != $app->contact['id']) && ($item['network'] == Protocol::DFRN)) {
3431                                         $img_url = 'redir/' . $item['contact-id'] . '?url=' . urlencode($mtch[1]);
3432                                         $item['body'] = str_replace($mtch[0], '[img]' . $img_url . '[/img]', $item['body']);
3433                                 }
3434                         }
3435                 }
3436         }
3437
3438         /**
3439          * Given an item array, convert the body element from bbcode to html and add smilie icons.
3440          * If attach is true, also add icons for item attachments.
3441          *
3442          * @param array   $item
3443          * @param boolean $attach
3444          * @param boolean $is_preview
3445          * @return string item body html
3446          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
3447          * @throws \ImagickException
3448          * @hook  prepare_body_init item array before any work
3449          * @hook  prepare_body_content_filter ('item'=>item array, 'filter_reasons'=>string array) before first bbcode to html
3450          * @hook  prepare_body ('item'=>item array, 'html'=>body string, 'is_preview'=>boolean, 'filter_reasons'=>string array) after first bbcode to html
3451          * @hook  prepare_body_final ('item'=>item array, 'html'=>body string) after attach icons and blockquote special case handling (spoiler, author)
3452          */
3453         public static function prepareBody(array &$item, $attach = false, $is_preview = false)
3454         {
3455                 $a = DI::app();
3456                 Hook::callAll('prepare_body_init', $item);
3457
3458                 // In order to provide theme developers more possibilities, event items
3459                 // are treated differently.
3460                 if ($item['object-type'] === Activity\ObjectType::EVENT && isset($item['event-id'])) {
3461                         $ev = Event::getItemHTML($item);
3462                         return $ev;
3463                 }
3464
3465                 $tags = Tag::populateFromItem($item);
3466
3467                 $item['tags'] = $tags['tags'];
3468                 $item['hashtags'] = $tags['hashtags'];
3469                 $item['mentions'] = $tags['mentions'];
3470
3471                 // Compile eventual content filter reasons
3472                 $filter_reasons = [];
3473                 if (!$is_preview && public_contact() != $item['author-id']) {
3474                         if (!empty($item['content-warning']) && (!local_user() || !DI::pConfig()->get(local_user(), 'system', 'disable_cw', false))) {
3475                                 $filter_reasons[] = DI::l10n()->t('Content warning: %s', $item['content-warning']);
3476                         }
3477
3478                         $hook_data = [
3479                                 'item' => $item,
3480                                 'filter_reasons' => $filter_reasons
3481                         ];
3482                         Hook::callAll('prepare_body_content_filter', $hook_data);
3483                         $filter_reasons = $hook_data['filter_reasons'];
3484                         unset($hook_data);
3485                 }
3486
3487                 // Update the cached values if there is no "zrl=..." on the links.
3488                 $update = (!Session::isAuthenticated() && ($item["uid"] == 0));
3489
3490                 // Or update it if the current viewer is the intented viewer.
3491                 if (($item["uid"] == local_user()) && ($item["uid"] != 0)) {
3492                         $update = true;
3493                 }
3494
3495                 self::putInCache($item, $update);
3496                 $s = $item["rendered-html"];
3497
3498                 $hook_data = [
3499                         'item' => $item,
3500                         'html' => $s,
3501                         'preview' => $is_preview,
3502                         'filter_reasons' => $filter_reasons
3503                 ];
3504                 Hook::callAll('prepare_body', $hook_data);
3505                 $s = $hook_data['html'];
3506                 unset($hook_data);
3507
3508                 if (!$attach) {
3509                         // Replace the blockquotes with quotes that are used in mails.
3510                         $mailquote = '<blockquote type="cite" class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">';
3511                         $s = str_replace(['<blockquote>', '<blockquote class="spoiler">', '<blockquote class="author">'], [$mailquote, $mailquote, $mailquote], $s);
3512                         return $s;
3513                 }
3514
3515                 $as = '';
3516                 $vhead = false;
3517                 $matches = [];
3518                 preg_match_all('|\[attach\]href=\"(.*?)\" length=\"(.*?)\" type=\"(.*?)\"(?: title=\"(.*?)\")?|', $item['attach'], $matches, PREG_SET_ORDER);
3519                 foreach ($matches as $mtch) {
3520                         $mime = $mtch[3];
3521
3522                         $the_url = Contact::magicLinkById($item['author-id'], $mtch[1]);
3523
3524                         if (strpos($mime, 'video') !== false) {
3525                                 if (!$vhead) {
3526                                         $vhead = true;
3527                                         DI::page()['htmlhead'] .= Renderer::replaceMacros(Renderer::getMarkupTemplate('videos_head.tpl'));
3528                                 }
3529
3530                                 $url_parts = explode('/', $the_url);
3531                                 $id = end($url_parts);
3532                                 $as .= Renderer::replaceMacros(Renderer::getMarkupTemplate('video_top.tpl'), [
3533                                         '$video' => [
3534                                                 'id'     => $id,
3535                                                 'title'  => DI::l10n()->t('View Video'),
3536                                                 'src'    => $the_url,
3537                                                 'mime'   => $mime,
3538                                         ],
3539                                 ]);
3540                         }
3541
3542                         $filetype = strtolower(substr($mime, 0, strpos($mime, '/')));
3543                         if ($filetype) {
3544                                 $filesubtype = strtolower(substr($mime, strpos($mime, '/') + 1));
3545                                 $filesubtype = str_replace('.', '-', $filesubtype);
3546                         } else {
3547                                 $filetype = 'unkn';
3548                                 $filesubtype = 'unkn';
3549                         }
3550
3551                         $title = Strings::escapeHtml(trim(($mtch[4] ?? '') ?: $mtch[1]));
3552                         $title .= ' ' . $mtch[2] . ' ' . DI::l10n()->t('bytes');
3553
3554                         $icon = '<div class="attachtype icon s22 type-' . $filetype . ' subtype-' . $filesubtype . '"></div>';
3555                         $as .= '<a href="' . strip_tags($the_url) . '" title="' . $title . '" class="attachlink" target="_blank" rel="noopener noreferrer" >' . $icon . '</a>';
3556                 }
3557
3558                 if ($as != '') {
3559                         $s .= '<div class="body-attach">'.$as.'<div class="clear"></div></div>';
3560                 }
3561
3562                 // Map.
3563                 if (strpos($s, '<div class="map">') !== false && !empty($item['coord'])) {
3564                         $x = Map::byCoordinates(trim($item['coord']));
3565                         if ($x) {
3566                                 $s = preg_replace('/\<div class\=\"map\"\>/', '$0' . $x, $s);
3567                         }
3568                 }
3569
3570                 // Replace friendica image url size with theme preference.
3571                 if (!empty($a->theme_info['item_image_size'])) {
3572                         $ps = $a->theme_info['item_image_size'];
3573                         $s = preg_replace('|(<img[^>]+src="[^"]+/photo/[0-9a-f]+)-[0-9]|', "$1-" . $ps, $s);
3574                 }
3575
3576                 $s = HTML::applyContentFilter($s, $filter_reasons);
3577
3578                 $hook_data = ['item' => $item, 'html' => $s];
3579                 Hook::callAll('prepare_body_final', $hook_data);
3580
3581                 return $hook_data['html'];
3582         }
3583
3584         /**
3585          * get private link for item
3586          *
3587          * @param array $item
3588          * @return boolean|array False if item has not plink, otherwise array('href'=>plink url, 'title'=>translated title)
3589          * @throws \Exception
3590          */
3591         public static function getPlink($item)
3592         {
3593                 $a = DI::app();
3594
3595                 if ($a->user['nickname'] != "") {
3596                         $ret = [
3597                                 'href' => "display/" . $item['guid'],
3598                                 'orig' => "display/" . $item['guid'],
3599                                 'title' => DI::l10n()->t('View on separate page'),
3600                                 'orig_title' => DI::l10n()->t('view on separate page'),
3601                         ];
3602
3603                         if (!empty($item['plink'])) {
3604                                 $ret["href"] = DI::baseUrl()->remove($item['plink']);
3605                                 $ret["title"] = DI::l10n()->t('link to source');
3606                         }
3607
3608                 } elseif (!empty($item['plink']) && ($item['private'] != self::PRIVATE)) {
3609                         $ret = [
3610                                 'href' => $item['plink'],
3611                                 'orig' => $item['plink'],
3612                                 'title' => DI::l10n()->t('link to source'),
3613                         ];
3614                 } else {
3615                         $ret = [];
3616                 }
3617
3618                 return $ret;
3619         }
3620
3621         /**
3622          * Is the given item array a post that is sent as starting post to a forum?
3623          *
3624          * @param array $item
3625          * @param array $owner
3626          *
3627          * @return boolean "true" when it is a forum post
3628          */
3629         public static function isForumPost(array $item, array $owner = [])
3630         {
3631                 if (empty($owner)) {
3632                         $owner = User::getOwnerDataById($item['uid']);
3633                         if (empty($owner)) {
3634                                 return false;
3635                         }
3636                 }
3637
3638                 if (($item['author-id'] == $item['owner-id']) ||
3639                         ($owner['id'] == $item['contact-id']) ||
3640                         ($item['uri'] != $item['parent-uri']) ||
3641                         $item['origin']) {
3642                         return false;
3643                 }
3644
3645                 return Contact::isForum($item['contact-id']);
3646         }
3647
3648         /**
3649          * Search item id for given URI or plink
3650          *
3651          * @param string $uri
3652          * @param integer $uid
3653          *
3654          * @return integer item id
3655          */
3656         public static function searchByLink($uri, $uid = 0)
3657         {
3658                 $ssl_uri = str_replace('http://', 'https://', $uri);
3659                 $uris = [$uri, $ssl_uri, Strings::normaliseLink($uri)];
3660
3661                 $item = DBA::selectFirst('item', ['id'], ['uri' => $uris, 'uid' => $uid]);
3662                 if (DBA::isResult($item)) {
3663                         return $item['id'];
3664                 }
3665
3666                 $itemcontent = DBA::selectFirst('item-content', ['uri-id'], ['plink' => $uris]);
3667                 if (!DBA::isResult($itemcontent)) {
3668                         return 0;
3669                 }
3670
3671                 $itemuri = DBA::selectFirst('item-uri', ['uri'], ['id' => $itemcontent['uri-id']]);
3672                 if (!DBA::isResult($itemuri)) {
3673                         return 0;
3674                 }
3675
3676                 $item = DBA::selectFirst('item', ['id'], ['uri' => $itemuri['uri'], 'uid' => $uid]);
3677                 if (DBA::isResult($item)) {
3678                         return $item['id'];
3679                 }
3680
3681                 return 0;
3682         }
3683
3684         /**
3685          * Return the URI for a link to the post
3686          *
3687          * @param string $uri URI or link to post
3688          *
3689          * @return string URI
3690          */
3691         public static function getURIByLink(string $uri)
3692         {
3693                 $ssl_uri = str_replace('http://', 'https://', $uri);
3694                 $uris = [$uri, $ssl_uri, Strings::normaliseLink($uri)];
3695
3696                 $item = DBA::selectFirst('item', ['uri'], ['uri' => $uris]);
3697                 if (DBA::isResult($item)) {
3698                         return $item['uri'];
3699                 }
3700
3701                 $itemcontent = DBA::selectFirst('item-content', ['uri-id'], ['plink' => $uris]);
3702                 if (!DBA::isResult($itemcontent)) {
3703                         return '';
3704                 }
3705
3706                 $itemuri = DBA::selectFirst('item-uri', ['uri'], ['id' => $itemcontent['uri-id']]);
3707                 if (DBA::isResult($itemuri)) {
3708                         return $itemuri['uri'];
3709                 }
3710
3711                 return '';
3712         }
3713
3714         /**
3715          * Fetches item for given URI or plink
3716          *
3717          * @param string $uri
3718          * @param integer $uid
3719          *
3720          * @return integer item id
3721          */
3722         public static function fetchByLink($uri, $uid = 0)
3723         {
3724                 $item_id = self::searchByLink($uri, $uid);
3725                 if (!empty($item_id)) {
3726                         return $item_id;
3727                 }
3728
3729                 if ($fetched_uri = ActivityPub\Processor::fetchMissingActivity($uri)) {
3730                         $item_id = self::searchByLink($fetched_uri, $uid);
3731                 } else {
3732                         $item_id = Diaspora::fetchByURL($uri);
3733                 }
3734
3735                 if (!empty($item_id)) {
3736                         return $item_id;
3737                 }
3738
3739                 return 0;
3740         }
3741
3742         /**
3743          * Return share data from an item array (if the item is shared item)
3744          * We are providing the complete Item array, because at some time in the future
3745          * we hopefully will define these values not in the body anymore but in some item fields.
3746          * This function is meant to replace all similar functions in the system.
3747          *
3748          * @param array $item
3749          *
3750          * @return array with share information
3751          */
3752         public static function getShareArray($item)
3753         {
3754                 if (!preg_match("/(.*?)\[share(.*?)\]\s?(.*?)\s?\[\/share\]\s?/ism", $item['body'], $matches)) {
3755                         return [];
3756                 }
3757
3758                 $attribute_string = $matches[2];
3759                 $attributes = ['comment' => trim($matches[1]), 'shared' => trim($matches[3])];
3760                 foreach (['author', 'profile', 'avatar', 'guid', 'posted', 'link'] as $field) {
3761                         if (preg_match("/$field=(['\"])(.+?)\\1/ism", $attribute_string, $matches)) {
3762                                 $attributes[$field] = trim(html_entity_decode($matches[2] ?? '', ENT_QUOTES, 'UTF-8'));
3763                         }
3764                 }
3765                 return $attributes;
3766         }
3767
3768         /**
3769          * Fetch item information for shared items from the original items and adds it.
3770          *
3771          * @param array $item
3772          *
3773          * @return array item array with data from the original item
3774          */
3775         public static function addShareDataFromOriginal($item)
3776         {
3777                 $shared = self::getShareArray($item);
3778                 if (empty($shared)) {
3779                         return $item;
3780                 }
3781
3782                 // Real reshares always have got a GUID.
3783                 if (empty($shared['guid'])) {
3784                         return $item;
3785                 }
3786
3787                 $uid = $item['uid'] ?? 0;
3788
3789                 // first try to fetch the item via the GUID. This will work for all reshares that had been created on this system
3790                 $shared_item = self::selectFirst(['title', 'body', 'attach'], ['guid' => $shared['guid'], 'uid' => [0, $uid]]);
3791                 if (!DBA::isResult($shared_item)) {
3792                         if (empty($shared['link'])) {
3793                                 return $item;
3794                         }
3795
3796                         // Otherwhise try to find (and possibly fetch) the item via the link. This should work for Diaspora and ActivityPub posts
3797                         $id = self::fetchByLink($shared['link'], $uid);
3798                         if (empty($id)) {
3799                                 Logger::info('Original item not found', ['url' => $shared['link'], 'callstack' => System::callstack()]);
3800                                 return $item;
3801                         }
3802
3803                         $shared_item = self::selectFirst(['title', 'body', 'attach'], ['id' => $id]);
3804                         if (!DBA::isResult($shared_item)) {
3805                                 return $item;
3806                         }
3807                         Logger::info('Got shared data from url', ['url' => $shared['link'], 'callstack' => System::callstack()]);
3808                 } else {
3809                         Logger::info('Got shared data from guid', ['guid' => $shared['guid'], 'callstack' => System::callstack()]);
3810                 }
3811
3812                 if (!empty($shared_item['title'])) {
3813                         $body = '[h3]' . $shared_item['title'] . "[/h3]\n" . $shared_item['body'];
3814                         unset($shared_item['title']);
3815                 } else {
3816                         $body = $shared_item['body'];
3817                 }
3818
3819                 $item['body'] = preg_replace("/\[share ([^\[\]]*)\].*\[\/share\]/ism", '[share $1]' . $body . '[/share]', $item['body']);
3820                 unset($shared_item['body']);
3821
3822                 return array_merge($item, $shared_item);
3823         }
3824 }