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\Protocol\Activity;
  36 use Friendica\Protocol\ActivityPub;
  37 use Friendica\Protocol\Diaspora;
  38 use Friendica\Protocol\OStatus;
  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\Util\XML;
  45 use Friendica\Worker\Delivery;
  46 use Text_LanguageDetect;
  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', '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'
  76         ];
  77
  78         // Field list that is used to deliver items via the protocols
  79         const DELIVER_FIELDLIST = ['uid', 'id', 'parent', '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', 'tag', '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', 'guid',
  97                         'contact-id', 'type', 'wall', 'gravity', 'extid', 'icid', 'iaid', 'psid',
  98                         'created', 'edited', 'commented', 'received', 'changed', 'verb',
  99                         'postopts', 'plink', 'resource-id', 'event-id', 'tag', 'attach', 'inform',
 100                         'file', 'allow_cid', 'allow_gid', 'deny_cid', 'deny_gid', 'post-type',
 101                         'private', 'pubmail', 'moderated', 'visible', 'starred', 'bookmark',
 102                         'unseen', 'deleted', 'origin', 'forum_mode', 'mention', 'global', 'network',
 103                         'title', 'content-warning', 'body', 'location', 'coord', 'app',
 104                         'rendered-hash', 'rendered-html', 'object-type', 'object', 'target-type', 'target',
 105                         'author-id', 'author-link', 'author-name', 'author-avatar', 'author-network',
 106                         'owner-id', 'owner-link', 'owner-name', 'owner-avatar'];
 107
 108         // Never reorder or remove entries from this list. Just add new ones at the end, if needed.
 109         // The item-activity table only stores the index and needs this array to know the matching activity.
 110         const ACTIVITIES = [
 111                 Activity::LIKE, Activity::DISLIKE,
 112                 Activity::ATTEND, Activity::ATTENDNO, Activity::ATTENDMAYBE,
 113                 Activity::FOLLOW,
 114                 Activity::ANNOUNCE];
 115
 116         const PUBLIC = 0;
 117         const PRIVATE = 1;
 118         const UNLISTED = 2;
 119
 120         private static $legacy_mode = null;
 121
 122         public static function isLegacyMode()
 123         {
 124                 if (is_null(self::$legacy_mode)) {
 125                         self::$legacy_mode = (DI::config()->get("system", "post_update_version") < 1279);
 126                 }
 127
 128                 return self::$legacy_mode;
 129         }
 130
 131         /**
 132          * Set the pinned state of an item
 133          *
 134          * @param integer $iid    Item ID
 135          * @param integer $uid    User ID
 136          * @param boolean $pinned Pinned state
 137          */
 138         public static function setPinned(int $iid, int $uid, bool $pinned)
 139         {
 140                 DBA::update('user-item', ['pinned' => $pinned], ['iid' => $iid, 'uid' => $uid], true);
 141         }
 142
 143         /**
 144          * Get the pinned state
 145          *
 146          * @param integer $iid Item ID
 147          * @param integer $uid User ID
 148          *
 149          * @return boolean pinned state
 150          */
 151         public static function getPinned(int $iid, int $uid)
 152         {
 153                 $useritem = DBA::selectFirst('user-item', ['pinned'], ['iid' => $iid, 'uid' => $uid]);
 154                 if (!DBA::isResult($useritem)) {
 155                         return false;
 156                 }
 157                 return (bool)$useritem['pinned'];
 158         }
 159
 160         /**
 161          * Select pinned rows from the item table for a given user
 162          *
 163          * @param integer $uid       User ID
 164          * @param array   $selected  Array of selected fields, empty for all
 165          * @param array   $condition Array of fields for condition
 166          * @param array   $params    Array of several parameters
 167          *
 168          * @return boolean|object
 169          * @throws \Exception
 170          */
 171         public static function selectPinned(int $uid, array $selected = [], array $condition = [], $params = [])
 172         {
 173                 $useritems = DBA::select('user-item', ['iid'], ['uid' => $uid, 'pinned' => true]);
 174                 if (!DBA::isResult($useritems)) {
 175                         return $useritems;
 176                 }
 177
 178                 $pinned = [];
 179                 while ($useritem = self::fetch($useritems)) {
 180                         $pinned[] = $useritem['iid'];
 181                 }
 182                 DBA::close($useritems);
 183
 184                 if (empty($pinned)) {
 185                         return [];
 186                 }
 187
 188                 if (empty($condition) || !is_array($condition)) {
 189                         $condition = ['iid' => $pinned];
 190                 } else {
 191                         reset($condition);
 192                         $first_key = key($condition);
 193                         if (!is_int($first_key)) {
 194                                 $condition['iid'] = $pinned;
 195                         } else {
 196                                 $values_string = substr(str_repeat("?, ", count($pinned)), 0, -2);
 197                                 $condition[0] = '(' . $condition[0] . ") AND `iid` IN (" . $values_string . ")";
 198                                 $condition = array_merge($condition, $pinned);
 199                         }
 200                 }
 201
 202                 return self::selectThreadForUser($uid, $selected, $condition, $params);
 203         }
 204
 205         /**
 206          * returns an activity index from an activity string
 207          *
 208          * @param string $activity activity string
 209          * @return integer Activity index
 210          */
 211         public static function activityToIndex($activity)
 212         {
 213                 $index = array_search($activity, self::ACTIVITIES);
 214
 215                 if (is_bool($index)) {
 216                         $index = -1;
 217                 }
 218
 219                 return $index;
 220         }
 221
 222         /**
 223          * returns an activity string from an activity index
 224          *
 225          * @param integer $index activity index
 226          * @return string Activity string
 227          */
 228         private static function indexToActivity($index)
 229         {
 230                 if (is_null($index) || !array_key_exists($index, self::ACTIVITIES)) {
 231                         return '';
 232                 }
 233
 234                 return self::ACTIVITIES[$index];
 235         }
 236
 237         /**
 238          * Fetch a single item row
 239          *
 240          * @param mixed $stmt statement object
 241          * @return array current row
 242          */
 243         public static function fetch($stmt)
 244         {
 245                 $row = DBA::fetch($stmt);
 246
 247                 if (is_bool($row)) {
 248                         return $row;
 249                 }
 250
 251                 // ---------------------- Transform item structure data ----------------------
 252
 253                 // We prefer the data from the user's contact over the public one
 254                 if (!empty($row['author-link']) && !empty($row['contact-link']) &&
 255                         ($row['author-link'] == $row['contact-link'])) {
 256                         if (isset($row['author-avatar']) && !empty($row['contact-avatar'])) {
 257                                 $row['author-avatar'] = $row['contact-avatar'];
 258                         }
 259                         if (isset($row['author-name']) && !empty($row['contact-name'])) {
 260                                 $row['author-name'] = $row['contact-name'];
 261                         }
 262                 }
 263
 264                 if (!empty($row['owner-link']) && !empty($row['contact-link']) &&
 265                         ($row['owner-link'] == $row['contact-link'])) {
 266                         if (isset($row['owner-avatar']) && !empty($row['contact-avatar'])) {
 267                                 $row['owner-avatar'] = $row['contact-avatar'];
 268                         }
 269                         if (isset($row['owner-name']) && !empty($row['contact-name'])) {
 270                                 $row['owner-name'] = $row['contact-name'];
 271                         }
 272                 }
 273
 274                 // We can always comment on posts from these networks
 275                 if (array_key_exists('writable', $row) &&
 276                         in_array($row['internal-network'], Protocol::FEDERATED)) {
 277                         $row['writable'] = true;
 278                 }
 279
 280                 // ---------------------- Transform item content data ----------------------
 281
 282                 // Fetch data from the item-content table whenever there is content there
 283                 if (self::isLegacyMode()) {
 284                         $legacy_fields = array_merge(ItemDeliveryData::LEGACY_FIELD_LIST, self::MIXED_CONTENT_FIELDLIST);
 285                         foreach ($legacy_fields as $field) {
 286                                 if (empty($row[$field]) && !empty($row['internal-item-' . $field])) {
 287                                         $row[$field] = $row['internal-item-' . $field];
 288                                 }
 289                                 unset($row['internal-item-' . $field]);
 290                         }
 291                 }
 292
 293                 if (!empty($row['internal-iaid']) && array_key_exists('verb', $row)) {
 294                         $row['verb'] = self::indexToActivity($row['internal-activity']);
 295                         if (array_key_exists('title', $row)) {
 296                                 $row['title'] = '';
 297                         }
 298                         if (array_key_exists('body', $row)) {
 299                                 $row['body'] = $row['verb'];
 300                         }
 301                         if (array_key_exists('object', $row)) {
 302                                 $row['object'] = '';
 303                         }
 304                         if (array_key_exists('object-type', $row)) {
 305                                 $row['object-type'] = Activity\ObjectType::NOTE;
 306                         }
 307                 } elseif (array_key_exists('verb', $row) && in_array($row['verb'], ['', Activity::POST, Activity::SHARE])) {
 308                         // Posts don't have a target - but having tags or files.
 309                         // We safe some performance by building tag and file strings only here.
 310                         // We remove the target since they aren't used for this type.
 311                         // In mail posts we do store some mail header data in the object.
 312                         if (array_key_exists('target', $row)) {
 313                                 $row['target'] = '';
 314                         }
 315                 }
 316
 317                 if (!array_key_exists('verb', $row) || in_array($row['verb'], ['', Activity::POST, Activity::SHARE])) {
 318                         // Build the tag string out of the term entries
 319                         if (array_key_exists('tag', $row) && empty($row['tag'])) {
 320                                 $row['tag'] = Term::tagTextFromItemId($row['internal-iid']);
 321                         }
 322
 323                         // Build the file string out of the term entries
 324                         if (array_key_exists('file', $row) && empty($row['file'])) {
 325                                 $row['file'] = Term::fileTextFromItemId($row['internal-iid']);
 326                         }
 327                 }
 328
 329                 if (array_key_exists('signed_text', $row) && array_key_exists('interaction', $row) && !is_null($row['interaction'])) {
 330                         $row['signed_text'] = $row['interaction'];
 331                 }
 332
 333                 if (array_key_exists('ignored', $row) && array_key_exists('internal-user-ignored', $row) && !is_null($row['internal-user-ignored'])) {
 334                         $row['ignored'] = $row['internal-user-ignored'];
 335                 }
 336
 337                 // Remove internal fields
 338                 unset($row['internal-activity']);
 339                 unset($row['internal-network']);
 340                 unset($row['internal-iid']);
 341                 unset($row['internal-iaid']);
 342                 unset($row['internal-icid']);
 343                 unset($row['internal-user-ignored']);
 344                 unset($row['interaction']);
 345
 346                 return $row;
 347         }
 348
 349         /**
 350          * Fills an array with data from an item query
 351          *
 352          * @param object $stmt statement object
 353          * @param bool   $do_close
 354          * @return array Data array
 355          */
 356         public static function inArray($stmt, $do_close = true) {
 357                 if (is_bool($stmt)) {
 358                         return $stmt;
 359                 }
 360
 361                 $data = [];
 362                 while ($row = self::fetch($stmt)) {
 363                         $data[] = $row;
 364                 }
 365                 if ($do_close) {
 366                         DBA::close($stmt);
 367                 }
 368                 return $data;
 369         }
 370
 371         /**
 372          * Check if item data exists
 373          *
 374          * @param array $condition array of fields for condition
 375          *
 376          * @return boolean Are there rows for that condition?
 377          * @throws \Exception
 378          */
 379         public static function exists($condition) {
 380                 $stmt = self::select(['id'], $condition, ['limit' => 1]);
 381
 382                 if (is_bool($stmt)) {
 383                         $retval = $stmt;
 384                 } else {
 385                         $retval = (DBA::numRows($stmt) > 0);
 386                 }
 387
 388                 DBA::close($stmt);
 389
 390                 return $retval;
 391         }
 392
 393         /**
 394          * Retrieve a single record from the item table for a given user and returns it in an associative array
 395          *
 396          * @param integer $uid User ID
 397          * @param array   $selected
 398          * @param array   $condition
 399          * @param array   $params
 400          * @return bool|array
 401          * @throws \Exception
 402          * @see   DBA::select
 403          */
 404         public static function selectFirstForUser($uid, array $selected = [], array $condition = [], $params = [])
 405         {
 406                 $params['uid'] = $uid;
 407
 408                 if (empty($selected)) {
 409                         $selected = Item::DISPLAY_FIELDLIST;
 410                 }
 411
 412                 return self::selectFirst($selected, $condition, $params);
 413         }
 414
 415         /**
 416          * Select rows from the item table for a given user
 417          *
 418          * @param integer $uid       User ID
 419          * @param array   $selected  Array of selected fields, empty for all
 420          * @param array   $condition Array of fields for condition
 421          * @param array   $params    Array of several parameters
 422          *
 423          * @return boolean|object
 424          * @throws \Exception
 425          */
 426         public static function selectForUser($uid, array $selected = [], array $condition = [], $params = [])
 427         {
 428                 $params['uid'] = $uid;
 429
 430                 if (empty($selected)) {
 431                         $selected = Item::DISPLAY_FIELDLIST;
 432                 }
 433
 434                 return self::select($selected, $condition, $params);
 435         }
 436
 437         /**
 438          * Retrieve a single record from the item table and returns it in an associative array
 439          *
 440          * @param array $fields
 441          * @param array $condition
 442          * @param array $params
 443          * @return bool|array
 444          * @throws \Exception
 445          * @see   DBA::select
 446          */
 447         public static function selectFirst(array $fields = [], array $condition = [], $params = [])
 448         {
 449                 $params['limit'] = 1;
 450
 451                 $result = self::select($fields, $condition, $params);
 452
 453                 if (is_bool($result)) {
 454                         return $result;
 455                 } else {
 456                         $row = self::fetch($result);
 457                         DBA::close($result);
 458                         return $row;
 459                 }
 460         }
 461
 462         /**
 463          * Select rows from the item table and returns them as an array
 464          *
 465          * @param array $selected  Array of selected fields, empty for all
 466          * @param array $condition Array of fields for condition
 467          * @param array $params    Array of several parameters
 468          *
 469          * @return array
 470          * @throws \Exception
 471          */
 472         public static function selectToArray(array $fields = [], array $condition = [], $params = [])
 473         {
 474                 $result = self::select($fields, $condition, $params);
 475
 476                 if (is_bool($result)) {
 477                         return [];
 478                 }
 479
 480                 $data = [];
 481                 while ($row = self::fetch($result)) {
 482                         $data[] = $row;
 483                 }
 484                 DBA::close($result);
 485
 486                 return $data;
 487         }
 488
 489         /**
 490          * Select rows from the item table
 491          *
 492          * @param array $selected  Array of selected fields, empty for all
 493          * @param array $condition Array of fields for condition
 494          * @param array $params    Array of several parameters
 495          *
 496          * @return boolean|object
 497          * @throws \Exception
 498          */
 499         public static function select(array $selected = [], array $condition = [], $params = [])
 500         {
 501                 $uid = 0;
 502                 $usermode = false;
 503
 504                 if (isset($params['uid'])) {
 505                         $uid = $params['uid'];
 506                         $usermode = true;
 507                 }
 508
 509                 $fields = self::fieldlist($usermode);
 510
 511                 $select_fields = self::constructSelectFields($fields, $selected);
 512
 513                 $condition_string = DBA::buildCondition($condition);
 514
 515                 $condition_string = self::addTablesToFields($condition_string, $fields);
 516
 517                 if ($usermode) {
 518                         $condition_string = $condition_string . ' AND ' . self::condition(false);
 519                 }
 520
 521                 $param_string = self::addTablesToFields(DBA::buildParameter($params), $fields);
 522
 523                 $table = "`item` " . self::constructJoins($uid, $select_fields . $condition_string . $param_string, false, $usermode);
 524
 525                 $sql = "SELECT " . $select_fields . " FROM " . $table . $condition_string . $param_string;
 526
 527                 return DBA::p($sql, $condition);
 528         }
 529
 530         /**
 531          * Select rows from the starting post in the item table
 532          *
 533          * @param integer $uid       User ID
 534          * @param array   $selected
 535          * @param array   $condition Array of fields for condition
 536          * @param array   $params    Array of several parameters
 537          *
 538          * @return boolean|object
 539          * @throws \Exception
 540          */
 541         public static function selectThreadForUser($uid, array $selected = [], array $condition = [], $params = [])
 542         {
 543                 $params['uid'] = $uid;
 544
 545                 if (empty($selected)) {
 546                         $selected = Item::DISPLAY_FIELDLIST;
 547                 }
 548
 549                 return self::selectThread($selected, $condition, $params);
 550         }
 551
 552         /**
 553          * Retrieve a single record from the starting post in the item table and returns it in an associative array
 554          *
 555          * @param integer $uid User ID
 556          * @param array   $selected
 557          * @param array   $condition
 558          * @param array   $params
 559          * @return bool|array
 560          * @throws \Exception
 561          * @see   DBA::select
 562          */
 563         public static function selectFirstThreadForUser($uid, array $selected = [], array $condition = [], $params = [])
 564         {
 565                 $params['uid'] = $uid;
 566
 567                 if (empty($selected)) {
 568                         $selected = Item::DISPLAY_FIELDLIST;
 569                 }
 570
 571                 return self::selectFirstThread($selected, $condition, $params);
 572         }
 573
 574         /**
 575          * Retrieve a single record from the starting post in the item table and returns it in an associative array
 576          *
 577          * @param array $fields
 578          * @param array $condition
 579          * @param array $params
 580          * @return bool|array
 581          * @throws \Exception
 582          * @see   DBA::select
 583          */
 584         public static function selectFirstThread(array $fields = [], array $condition = [], $params = [])
 585         {
 586                 $params['limit'] = 1;
 587                 $result = self::selectThread($fields, $condition, $params);
 588
 589                 if (is_bool($result)) {
 590                         return $result;
 591                 } else {
 592                         $row = self::fetch($result);
 593                         DBA::close($result);
 594                         return $row;
 595                 }
 596         }
 597
 598         /**
 599          * Select rows from the starting post in the item table
 600          *
 601          * @param array $selected  Array of selected fields, empty for all
 602          * @param array $condition Array of fields for condition
 603          * @param array $params    Array of several parameters
 604          *
 605          * @return boolean|object
 606          * @throws \Exception
 607          */
 608         public static function selectThread(array $selected = [], array $condition = [], $params = [])
 609         {
 610                 $uid = 0;
 611                 $usermode = false;
 612
 613                 if (isset($params['uid'])) {
 614                         $uid = $params['uid'];
 615                         $usermode = true;
 616                 }
 617
 618                 $fields = self::fieldlist($usermode);
 619
 620                 $fields['thread'] = ['mention', 'ignored', 'iid'];
 621
 622                 $threadfields = ['thread' => ['iid', 'uid', 'contact-id', 'owner-id', 'author-id',
 623                         'created', 'edited', 'commented', 'received', 'changed', 'wall', 'private',
 624                         'pubmail', 'moderated', 'visible', 'starred', 'ignored', 'post-type',
 625                         'unseen', 'deleted', 'origin', 'forum_mode', 'mention', 'network']];
 626
 627                 $select_fields = self::constructSelectFields($fields, $selected);
 628
 629                 $condition_string = DBA::buildCondition($condition);
 630
 631                 $condition_string = self::addTablesToFields($condition_string, $threadfields);
 632                 $condition_string = self::addTablesToFields($condition_string, $fields);
 633
 634                 if ($usermode) {
 635                         $condition_string = $condition_string . ' AND ' . self::condition(true);
 636                 }
 637
 638                 $param_string = DBA::buildParameter($params);
 639                 $param_string = self::addTablesToFields($param_string, $threadfields);
 640                 $param_string = self::addTablesToFields($param_string, $fields);
 641
 642                 $table = "`thread` " . self::constructJoins($uid, $select_fields . $condition_string . $param_string, true, $usermode);
 643
 644                 $sql = "SELECT " . $select_fields . " FROM " . $table . $condition_string . $param_string;
 645
 646                 return DBA::p($sql, $condition);
 647         }
 648
 649         /**
 650          * Returns a list of fields that are associated with the item table
 651          *
 652          * @param $usermode
 653          * @return array field list
 654          */
 655         private static function fieldlist($usermode)
 656         {
 657                 $fields = [];
 658
 659                 $fields['item'] = ['id', 'uid', 'parent', 'uri', 'parent-uri', 'thr-parent', 'guid',
 660                         'contact-id', 'owner-id', 'author-id', 'type', 'wall', 'gravity', 'extid',
 661                         'created', 'edited', 'commented', 'received', 'changed', 'psid',
 662                         'resource-id', 'event-id', 'tag', 'attach', 'post-type', 'file',
 663                         'private', 'pubmail', 'moderated', 'visible', 'starred', 'bookmark',
 664                         'unseen', 'deleted', 'origin', 'forum_mode', 'mention', 'global',
 665                         'id' => 'item_id', 'network', 'icid', 'iaid', 'id' => 'internal-iid',
 666                         'network' => 'internal-network', 'icid' => 'internal-icid',
 667                         'iaid' => 'internal-iaid'];
 668
 669                 if ($usermode) {
 670                         $fields['user-item'] = ['pinned', 'notification-type', 'ignored' => 'internal-user-ignored'];
 671                 }
 672
 673                 $fields['item-activity'] = ['activity', 'activity' => 'internal-activity'];
 674
 675                 $fields['item-content'] = array_merge(self::CONTENT_FIELDLIST, self::MIXED_CONTENT_FIELDLIST);
 676
 677                 $fields['item-delivery-data'] = array_merge(ItemDeliveryData::LEGACY_FIELD_LIST, ItemDeliveryData::FIELD_LIST);
 678
 679                 $fields['permissionset'] = ['allow_cid', 'allow_gid', 'deny_cid', 'deny_gid'];
 680
 681                 $fields['author'] = ['url' => 'author-link', 'name' => 'author-name', 'addr' => 'author-addr',
 682                         'thumb' => 'author-avatar', 'nick' => 'author-nick', 'network' => 'author-network'];
 683
 684                 $fields['owner'] = ['url' => 'owner-link', 'name' => 'owner-name', 'addr' => 'owner-addr',
 685                         'thumb' => 'owner-avatar', 'nick' => 'owner-nick', 'network' => 'owner-network'];
 686
 687                 $fields['contact'] = ['url' => 'contact-link', 'name' => 'contact-name', 'thumb' => 'contact-avatar',
 688                         'writable', 'self', 'id' => 'cid', 'alias', 'uid' => 'contact-uid',
 689                         'photo', 'name-date', 'uri-date', 'avatar-date', 'thumb', 'dfrn-id'];
 690
 691                 $fields['parent-item'] = ['guid' => 'parent-guid', 'network' => 'parent-network'];
 692
 693                 $fields['parent-item-author'] = ['url' => 'parent-author-link', 'name' => 'parent-author-name'];
 694
 695                 $fields['event'] = ['created' => 'event-created', 'edited' => 'event-edited',
 696                         'start' => 'event-start','finish' => 'event-finish',
 697                         'summary' => 'event-summary','desc' => 'event-desc',
 698                         'location' => 'event-location', 'type' => 'event-type',
 699                         'nofinish' => 'event-nofinish','adjust' => 'event-adjust',
 700                         'ignore' => 'event-ignore', 'id' => 'event-id'];
 701
 702                 $fields['sign'] = ['signed_text', 'signature', 'signer'];
 703
 704                 $fields['diaspora-interaction'] = ['interaction'];
 705
 706                 return $fields;
 707         }
 708
 709         /**
 710          * Returns SQL condition for the "select" functions
 711          *
 712          * @param boolean $thread_mode Called for the items (false) or for the threads (true)
 713          *
 714          * @return string SQL condition
 715          */
 716         private static function condition($thread_mode)
 717         {
 718                 if ($thread_mode) {
 719                         $master_table = "`thread`";
 720                 } else {
 721                         $master_table = "`item`";
 722                 }
 723                 return sprintf("$master_table.`visible` AND NOT $master_table.`deleted` AND NOT $master_table.`moderated`
 724                         AND (`user-item`.`hidden` IS NULL OR NOT `user-item`.`hidden`)
 725                         AND (`user-author`.`blocked` IS NULL OR NOT `user-author`.`blocked`)
 726                         AND (`user-author`.`ignored` IS NULL OR NOT `user-author`.`ignored` OR `item`.`gravity` != %d)
 727                         AND (`user-owner`.`blocked` IS NULL OR NOT `user-owner`.`blocked`)
 728                         AND (`user-owner`.`ignored` IS NULL OR NOT `user-owner`.`ignored` OR `item`.`gravity` != %d) ",
 729                         GRAVITY_PARENT, GRAVITY_PARENT);
 730         }
 731
 732         /**
 733          * Returns all needed "JOIN" commands for the "select" functions
 734          *
 735          * @param integer $uid          User ID
 736          * @param string  $sql_commands The parts of the built SQL commands in the "select" functions
 737          * @param boolean $thread_mode  Called for the items (false) or for the threads (true)
 738          *
 739          * @param         $user_mode
 740          * @return string The SQL joins for the "select" functions
 741          */
 742         private static function constructJoins($uid, $sql_commands, $thread_mode, $user_mode)
 743         {
 744                 if ($thread_mode) {
 745                         $master_table = "`thread`";
 746                         $master_table_key = "`thread`.`iid`";
 747                         $joins = "STRAIGHT_JOIN `item` ON `item`.`id` = `thread`.`iid` ";
 748                 } else {
 749                         $master_table = "`item`";
 750                         $master_table_key = "`item`.`id`";
 751                         $joins = '';
 752                 }
 753
 754                 if ($user_mode) {
 755                         $joins .= sprintf("STRAIGHT_JOIN `contact` ON `contact`.`id` = $master_table.`contact-id`
 756                                 AND NOT `contact`.`blocked`
 757                                 AND ((NOT `contact`.`readonly` AND NOT `contact`.`pending` AND (`contact`.`rel` IN (%s, %s)))
 758                                 OR `contact`.`self` OR `item`.`gravity` != %d OR `contact`.`uid` = 0)
 759                                 STRAIGHT_JOIN `contact` AS `author` ON `author`.`id` = $master_table.`author-id` AND NOT `author`.`blocked`
 760                                 STRAIGHT_JOIN `contact` AS `owner` ON `owner`.`id` = $master_table.`owner-id` AND NOT `owner`.`blocked`
 761                                 LEFT JOIN `user-item` ON `user-item`.`iid` = $master_table_key AND `user-item`.`uid` = %d
 762                                 LEFT JOIN `user-contact` AS `user-author` ON `user-author`.`cid` = $master_table.`author-id` AND `user-author`.`uid` = %d
 763                                 LEFT JOIN `user-contact` AS `user-owner` ON `user-owner`.`cid` = $master_table.`owner-id` AND `user-owner`.`uid` = %d",
 764                                 Contact::SHARING, Contact::FRIEND, GRAVITY_PARENT, intval($uid), intval($uid), intval($uid));
 765                 } else {
 766                         if (strpos($sql_commands, "`contact`.") !== false) {
 767                                 $joins .= "LEFT JOIN `contact` ON `contact`.`id` = $master_table.`contact-id`";
 768                         }
 769                         if (strpos($sql_commands, "`author`.") !== false) {
 770                                 $joins .= " LEFT JOIN `contact` AS `author` ON `author`.`id` = $master_table.`author-id`";
 771                         }
 772                         if (strpos($sql_commands, "`owner`.") !== false) {
 773                                 $joins .= " LEFT JOIN `contact` AS `owner` ON `owner`.`id` = $master_table.`owner-id`";
 774                         }
 775                 }
 776
 777                 if (strpos($sql_commands, "`group_member`.") !== false) {
 778                         $joins .= " STRAIGHT_JOIN `group_member` ON `group_member`.`contact-id` = $master_table.`contact-id`";
 779                 }
 780
 781                 if (strpos($sql_commands, "`user`.") !== false) {
 782                         $joins .= " STRAIGHT_JOIN `user` ON `user`.`uid` = $master_table.`uid`";
 783                 }
 784
 785                 if (strpos($sql_commands, "`event`.") !== false) {
 786                         $joins .= " LEFT JOIN `event` ON `event-id` = `event`.`id`";
 787                 }
 788
 789                 if (strpos($sql_commands, "`sign`.") !== false) {
 790                         $joins .= " LEFT JOIN `sign` ON `sign`.`iid` = `item`.`id`";
 791                 }
 792
 793                 if (strpos($sql_commands, "`diaspora-interaction`.") !== false) {
 794                         $joins .= " LEFT JOIN `diaspora-interaction` ON `diaspora-interaction`.`uri-id` = `item`.`uri-id`";
 795                 }
 796
 797                 if (strpos($sql_commands, "`item-activity`.") !== false) {
 798                         $joins .= " LEFT JOIN `item-activity` ON `item-activity`.`uri-id` = `item`.`uri-id`";
 799                 }
 800
 801                 if (strpos($sql_commands, "`item-content`.") !== false) {
 802                         $joins .= " LEFT JOIN `item-content` ON `item-content`.`uri-id` = `item`.`uri-id`";
 803                 }
 804
 805                 if (strpos($sql_commands, "`item-delivery-data`.") !== false) {
 806                         $joins .= " LEFT JOIN `item-delivery-data` ON `item-delivery-data`.`iid` = `item`.`id`";
 807                 }
 808
 809                 if (strpos($sql_commands, "`permissionset`.") !== false) {
 810                         $joins .= " LEFT JOIN `permissionset` ON `permissionset`.`id` = `item`.`psid`";
 811                 }
 812
 813                 if ((strpos($sql_commands, "`parent-item`.") !== false) || (strpos($sql_commands, "`parent-author`.") !== false)) {
 814                         $joins .= " STRAIGHT_JOIN `item` AS `parent-item` ON `parent-item`.`id` = `item`.`parent`";
 815                 }
 816
 817                 if (strpos($sql_commands, "`parent-item-author`.") !== false) {
 818                         $joins .= " STRAIGHT_JOIN `contact` AS `parent-item-author` ON `parent-item-author`.`id` = `parent-item`.`author-id`";
 819                 }
 820
 821                 return $joins;
 822         }
 823
 824         /**
 825          * Add the field list for the "select" functions
 826          *
 827          * @param array $fields The field definition array
 828          * @param array $selected The array with the selected fields from the "select" functions
 829          *
 830          * @return string The field list
 831          */
 832         private static function constructSelectFields($fields, $selected)
 833         {
 834                 if (!empty($selected)) {
 835                         $selected[] = 'internal-iid';
 836                         $selected[] = 'internal-iaid';
 837                         $selected[] = 'internal-icid';
 838                         $selected[] = '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                 if (in_array('signed_text', $selected)) {
 850                         $selected[] = 'interaction';
 851                 }
 852
 853                 $legacy_fields = array_merge(ItemDeliveryData::LEGACY_FIELD_LIST, self::MIXED_CONTENT_FIELDLIST);
 854
 855                 $selection = [];
 856                 foreach ($fields as $table => $table_fields) {
 857                         foreach ($table_fields as $field => $select) {
 858                                 if (empty($selected) || in_array($select, $selected)) {
 859                                         if (self::isLegacyMode() && in_array($select, $legacy_fields)) {
 860                                                 $selection[] = "`item`.`".$select."` AS `internal-item-" . $select . "`";
 861                                         }
 862                                         if (is_int($field)) {
 863                                                 $selection[] = "`" . $table . "`.`" . $select . "`";
 864                                         } else {
 865                                                 $selection[] = "`" . $table . "`.`" . $field . "` AS `" . $select . "`";
 866                                         }
 867                                 }
 868                         }
 869                 }
 870                 return implode(", ", $selection);
 871         }
 872
 873         /**
 874          * add table definition to fields in an SQL query
 875          *
 876          * @param string $query SQL query
 877          * @param array $fields The field definition array
 878          *
 879          * @return string the changed SQL query
 880          */
 881         private static function addTablesToFields($query, $fields)
 882         {
 883                 foreach ($fields as $table => $table_fields) {
 884                         foreach ($table_fields as $alias => $field) {
 885                                 if (is_int($alias)) {
 886                                         $replace_field = $field;
 887                                 } else {
 888                                         $replace_field = $alias;
 889                                 }
 890
 891                                 $search = "/([^\.])`" . $field . "`/i";
 892                                 $replace = "$1`" . $table . "`.`" . $replace_field . "`";
 893                                 $query = preg_replace($search, $replace, $query);
 894                         }
 895                 }
 896                 return $query;
 897         }
 898
 899         /**
 900          * Update existing item entries
 901          *
 902          * @param array $fields    The fields that are to be changed
 903          * @param array $condition The condition for finding the item entries
 904          *
 905          * In the future we may have to change permissions as well.
 906          * Then we had to add the user id as third parameter.
 907          *
 908          * A return value of "0" doesn't mean an error - but that 0 rows had been changed.
 909          *
 910          * @return integer|boolean number of affected rows - or "false" if there was an error
 911          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 912          */
 913         public static function update(array $fields, array $condition)
 914         {
 915                 if (empty($condition) || empty($fields)) {
 916                         return false;
 917                 }
 918
 919                 // To ensure the data integrity we do it in an transaction
 920                 DBA::transaction();
 921
 922                 // We cannot simply expand the condition to check for origin entries
 923                 // The condition needn't to be a simple array but could be a complex condition.
 924                 // And we have to execute this query before the update to ensure to fetch the same data.
 925                 $items = DBA::select('item', ['id', 'origin', 'uri', 'uri-id', 'iaid', 'icid', 'tag', 'file'], $condition);
 926
 927                 $content_fields = [];
 928                 foreach (array_merge(self::CONTENT_FIELDLIST, self::MIXED_CONTENT_FIELDLIST) as $field) {
 929                         if (isset($fields[$field])) {
 930                                 $content_fields[$field] = $fields[$field];
 931                                 if (in_array($field, self::CONTENT_FIELDLIST) || !self::isLegacyMode()) {
 932                                         unset($fields[$field]);
 933                                 } else {
 934                                         $fields[$field] = null;
 935                                 }
 936                         }
 937                 }
 938
 939                 $delivery_data = ItemDeliveryData::extractFields($fields);
 940
 941                 $clear_fields = ['bookmark', 'type', 'author-name', 'author-avatar', 'author-link', 'owner-name', 'owner-avatar', 'owner-link', 'postopts', 'inform'];
 942                 foreach ($clear_fields as $field) {
 943                         if (array_key_exists($field, $fields)) {
 944                                 $fields[$field] = null;
 945                         }
 946                 }
 947
 948                 if (array_key_exists('tag', $fields)) {
 949                         $tags = $fields['tag'];
 950                         $fields['tag'] = null;
 951                 } else {
 952                         $tags = null;
 953                 }
 954
 955                 if (array_key_exists('file', $fields)) {
 956                         $files = $fields['file'];
 957                         $fields['file'] = null;
 958                 } else {
 959                         $files = null;
 960                 }
 961
 962                 if (!empty($fields)) {
 963                         $success = DBA::update('item', $fields, $condition);
 964
 965                         if (!$success) {
 966                                 DBA::close($items);
 967                                 DBA::rollback();
 968                                 return false;
 969                         }
 970                 }
 971
 972                 // When there is no content for the "old" item table, this will count the fetched items
 973                 $rows = DBA::affectedRows();
 974
 975                 $notify_items = [];
 976
 977                 while ($item = DBA::fetch($items)) {
 978                         if (!empty($item['iaid']) || (!empty($content_fields['verb']) && (self::activityToIndex($content_fields['verb']) >= 0))) {
 979                                 self::updateActivity($content_fields, ['uri-id' => $item['uri-id']]);
 980
 981                                 if (empty($item['iaid'])) {
 982                                         $item_activity = DBA::selectFirst('item-activity', ['id'], ['uri-id' => $item['uri-id']]);
 983                                         if (DBA::isResult($item_activity)) {
 984                                                 $item_fields = ['iaid' => $item_activity['id'], 'icid' => null];
 985                                                 foreach (self::MIXED_CONTENT_FIELDLIST as $field) {
 986                                                         if (self::isLegacyMode()) {
 987                                                                 $item_fields[$field] = null;
 988                                                         } else {
 989                                                                 unset($item_fields[$field]);
 990                                                         }
 991                                                 }
 992                                                 DBA::update('item', $item_fields, ['id' => $item['id']]);
 993
 994                                                 if (!empty($item['icid']) && !DBA::exists('item', ['icid' => $item['icid']])) {
 995                                                         DBA::delete('item-content', ['id' => $item['icid']]);
 996                                                 }
 997                                         }
 998                                 } elseif (!empty($item['icid'])) {
 999                                         DBA::update('item', ['icid' => null], ['id' => $item['id']]);
1000
1001                                         if (!DBA::exists('item', ['icid' => $item['icid']])) {
1002                                                 DBA::delete('item-content', ['id' => $item['icid']]);
1003                                         }
1004                                 }
1005                         } else {
1006                                 self::updateContent($content_fields, ['uri-id' => $item['uri-id']]);
1007
1008                                 if (empty($item['icid'])) {
1009                                         $item_content = DBA::selectFirst('item-content', [], ['uri-id' => $item['uri-id']]);
1010                                         if (DBA::isResult($item_content)) {
1011                                                 $item_fields = ['icid' => $item_content['id']];
1012                                                 // Clear all fields in the item table that have a content in the item-content table
1013                                                 foreach ($item_content as $field => $content) {
1014                                                         if (in_array($field, self::MIXED_CONTENT_FIELDLIST) && !empty($item_content[$field])) {
1015                                                                 if (self::isLegacyMode()) {
1016                                                                         $item_fields[$field] = null;
1017                                                                 } else {
1018                                                                         unset($item_fields[$field]);
1019                                                                 }
1020                                                         }
1021                                                 }
1022                                                 DBA::update('item', $item_fields, ['id' => $item['id']]);
1023                                         }
1024                                 }
1025                         }
1026
1027                         if (!is_null($tags)) {
1028                                 Term::insertFromTagFieldByItemId($item['id'], $tags);
1029                                 if (!empty($item['tag'])) {
1030                                         DBA::update('item', ['tag' => ''], ['id' => $item['id']]);
1031                                 }
1032                         }
1033
1034                         if (!is_null($files)) {
1035                                 Term::insertFromFileFieldByItemId($item['id'], $files);
1036                                 if (!empty($item['file'])) {
1037                                         DBA::update('item', ['file' => ''], ['id' => $item['id']]);
1038                                 }
1039                         }
1040
1041                         ItemDeliveryData::update($item['id'], $delivery_data);
1042
1043                         self::updateThread($item['id']);
1044
1045                         // We only need to notfiy others when it is an original entry from us.
1046                         // Only call the notifier when the item has some content relevant change.
1047                         if ($item['origin'] && in_array('edited', array_keys($fields))) {
1048                                 $notify_items[] = $item['id'];
1049                         }
1050                 }
1051
1052                 DBA::close($items);
1053                 DBA::commit();
1054
1055                 foreach ($notify_items as $notify_item) {
1056                         Worker::add(PRIORITY_HIGH, "Notifier", Delivery::POST, $notify_item);
1057                 }
1058
1059                 return $rows;
1060         }
1061
1062         /**
1063          * Delete an item and notify others about it - if it was ours
1064          *
1065          * @param array   $condition The condition for finding the item entries
1066          * @param integer $priority  Priority for the notification
1067          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1068          */
1069         public static function markForDeletion($condition, $priority = PRIORITY_HIGH)
1070         {
1071                 $items = self::select(['id'], $condition);
1072                 while ($item = self::fetch($items)) {
1073                         self::markForDeletionById($item['id'], $priority);
1074                 }
1075                 DBA::close($items);
1076         }
1077
1078         /**
1079          * Delete an item for an user and notify others about it - if it was ours
1080          *
1081          * @param array   $condition The condition for finding the item entries
1082          * @param integer $uid       User who wants to delete this item
1083          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1084          */
1085         public static function deleteForUser($condition, $uid)
1086         {
1087                 if ($uid == 0) {
1088                         return;
1089                 }
1090
1091                 $items = self::select(['id', 'uid'], $condition);
1092                 while ($item = self::fetch($items)) {
1093                         // "Deleting" global items just means hiding them
1094                         if ($item['uid'] == 0) {
1095                                 DBA::update('user-item', ['hidden' => true], ['iid' => $item['id'], 'uid' => $uid], true);
1096
1097                                 // Delete notifications
1098                                 DBA::delete('notify', ['iid' => $item['id'], 'uid' => $uid]);
1099                         } elseif ($item['uid'] == $uid) {
1100                                 self::markForDeletionById($item['id'], PRIORITY_HIGH);
1101                         } else {
1102                                 Logger::log('Wrong ownership. Not deleting item ' . $item['id']);
1103                         }
1104                 }
1105                 DBA::close($items);
1106         }
1107
1108         /**
1109          * Mark an item for deletion, delete related data and notify others about it - if it was ours
1110          *
1111          * @param integer $item_id
1112          * @param integer $priority Priority for the notification
1113          *
1114          * @return boolean success
1115          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1116          */
1117         public static function markForDeletionById($item_id, $priority = PRIORITY_HIGH)
1118         {
1119                 Logger::info('Mark item for deletion by id', ['id' => $item_id, 'callstack' => System::callstack()]);
1120                 // locate item to be deleted
1121                 $fields = ['id', 'uri', 'uid', 'parent', 'parent-uri', 'origin',
1122                         'deleted', 'file', 'resource-id', 'event-id', 'attach',
1123                         'verb', 'object-type', 'object', 'target', 'contact-id',
1124                         'icid', 'iaid', 'psid'];
1125                 $item = self::selectFirst($fields, ['id' => $item_id]);
1126                 if (!DBA::isResult($item)) {
1127                         Logger::info('Item not found.', ['id' => $item_id]);
1128                         return false;
1129                 }
1130
1131                 if ($item['deleted']) {
1132                         Logger::info('Item has already been marked for deletion.', ['id' => $item_id]);
1133                         return false;
1134                 }
1135
1136                 $parent = self::selectFirst(['origin'], ['id' => $item['parent']]);
1137                 if (!DBA::isResult($parent)) {
1138                         $parent = ['origin' => false];
1139                 }
1140
1141                 // clean up categories and tags so they don't end up as orphans
1142
1143                 $matches = false;
1144                 $cnt = preg_match_all('/<(.*?)>/', $item['file'], $matches, PREG_SET_ORDER);
1145
1146                 if ($cnt) {
1147                         foreach ($matches as $mtch) {
1148                                 FileTag::unsaveFile($item['uid'], $item['id'], $mtch[1],true);
1149                         }
1150                 }
1151
1152                 $matches = false;
1153
1154                 $cnt = preg_match_all('/\[(.*?)\]/', $item['file'], $matches, PREG_SET_ORDER);
1155
1156                 if ($cnt) {
1157                         foreach ($matches as $mtch) {
1158                                 FileTag::unsaveFile($item['uid'], $item['id'], $mtch[1],false);
1159                         }
1160                 }
1161
1162                 /*
1163                  * If item is a link to a photo resource, nuke all the associated photos
1164                  * (visitors will not have photo resources)
1165                  * This only applies to photos uploaded from the photos page. Photos inserted into a post do not
1166                  * generate a resource-id and therefore aren't intimately linked to the item.
1167                  */
1168                 /// @TODO: this should first check if photo is used elsewhere
1169                 if (strlen($item['resource-id'])) {
1170                         Photo::delete(['resource-id' => $item['resource-id'], 'uid' => $item['uid']]);
1171                 }
1172
1173                 // If item is a link to an event, delete the event.
1174                 if (intval($item['event-id'])) {
1175                         Event::delete($item['event-id']);
1176                 }
1177
1178                 // If item has attachments, drop them
1179                 /// @TODO: this should first check if attachment is used elsewhere
1180                 foreach (explode(",", $item['attach']) as $attach) {
1181                         preg_match("|attach/(\d+)|", $attach, $matches);
1182                         if (is_array($matches) && count($matches) > 1) {
1183                                 Attach::delete(['id' => $matches[1], 'uid' => $item['uid']]);
1184                         }
1185                 }
1186
1187                 // Delete tags that had been attached to other items
1188                 self::deleteTagsFromItem($item);
1189
1190                 // Delete notifications
1191                 DBA::delete('notify', ['iid' => $item['id'], 'uid' => $item['uid']]);
1192
1193                 // Set the item to "deleted"
1194                 $item_fields = ['deleted' => true, 'edited' => DateTimeFormat::utcNow(), 'changed' => DateTimeFormat::utcNow()];
1195                 DBA::update('item', $item_fields, ['id' => $item['id']]);
1196
1197                 Term::insertFromTagFieldByItemId($item['id'], '');
1198                 Term::insertFromFileFieldByItemId($item['id'], '');
1199                 self::deleteThread($item['id'], $item['parent-uri']);
1200
1201                 if (!self::exists(["`uri` = ? AND `uid` != 0 AND NOT `deleted`", $item['uri']])) {
1202                         self::markForDeletion(['uri' => $item['uri'], 'uid' => 0, 'deleted' => false], $priority);
1203                 }
1204
1205                 ItemDeliveryData::delete($item['id']);
1206
1207                 // We don't delete the item-activity here, since we need some of the data for ActivityPub
1208
1209                 if (!empty($item['icid']) && !self::exists(['icid' => $item['icid'], 'deleted' => false])) {
1210                         DBA::delete('item-content', ['id' => $item['icid']], ['cascade' => false]);
1211                 }
1212                 // When the permission set will be used in photo and events as well,
1213                 // this query here needs to be extended.
1214                 // @todo Currently deactivated. We need the permission set in the deletion process.
1215                 // This is a reminder to add the removal somewhere else.
1216                 //if (!empty($item['psid']) && !self::exists(['psid' => $item['psid'], 'deleted' => false])) {
1217                 //      DBA::delete('permissionset', ['id' => $item['psid']], ['cascade' => false]);
1218                 //}
1219
1220                 // If it's the parent of a comment thread, kill all the kids
1221                 if ($item['id'] == $item['parent']) {
1222                         self::markForDeletion(['parent' => $item['parent'], 'deleted' => false], $priority);
1223                 }
1224
1225                 // Is it our comment and/or our thread?
1226                 if ($item['origin'] || $parent['origin']) {
1227                         // When we delete the original post we will delete all existing copies on the server as well
1228                         self::markForDeletion(['uri' => $item['uri'], 'deleted' => false], $priority);
1229
1230                         // send the notification upstream/downstream
1231                         Worker::add(['priority' => $priority, 'dont_fork' => true], "Notifier", Delivery::DELETION, intval($item['id']));
1232                 } elseif ($item['uid'] != 0) {
1233
1234                         // When we delete just our local user copy of an item, we have to set a marker to hide it
1235                         $global_item = self::selectFirst(['id'], ['uri' => $item['uri'], 'uid' => 0, 'deleted' => false]);
1236                         if (DBA::isResult($global_item)) {
1237                                 DBA::update('user-item', ['hidden' => true], ['iid' => $global_item['id'], 'uid' => $item['uid']], true);
1238                         }
1239                 }
1240
1241                 Logger::info('Item has been marked for deletion.', ['id' => $item_id]);
1242
1243                 return true;
1244         }
1245
1246         private static function deleteTagsFromItem($item)
1247         {
1248                 if (($item["verb"] != Activity::TAG) || ($item["object-type"] != Activity\ObjectType::TAGTERM)) {
1249                         return;
1250                 }
1251
1252                 $xo = XML::parseString($item["object"], false);
1253                 $xt = XML::parseString($item["target"], false);
1254
1255                 if ($xt->type != Activity\ObjectType::NOTE) {
1256                         return;
1257                 }
1258
1259                 $i = self::selectFirst(['id', 'contact-id', 'tag'], ['uri' => $xt->id, 'uid' => $item['uid']]);
1260                 if (!DBA::isResult($i)) {
1261                         return;
1262                 }
1263
1264                 // For tags, the owner cannot remove the tag on the author's copy of the post.
1265                 $owner_remove = ($item["contact-id"] == $i["contact-id"]);
1266                 $author_copy = $item["origin"];
1267
1268                 if (($owner_remove && $author_copy) || !$owner_remove) {
1269                         return;
1270                 }
1271
1272                 $tags = explode(',', $i["tag"]);
1273                 $newtags = [];
1274                 if (count($tags)) {
1275                         foreach ($tags as $tag) {
1276                                 if (trim($tag) !== trim($xo->body)) {
1277                                        $newtags[] = trim($tag);
1278                                 }
1279                         }
1280                 }
1281                 self::update(['tag' => implode(',', $newtags)], ['id' => $i["id"]]);
1282         }
1283
1284         private static function guid($item, $notify)
1285         {
1286                 if (!empty($item['guid'])) {
1287                         return Strings::escapeTags(trim($item['guid']));
1288                 }
1289
1290                 if ($notify) {
1291                         // We have to avoid duplicates. So we create the GUID in form of a hash of the plink or uri.
1292                         // We add the hash of our own host because our host is the original creator of the post.
1293                         $prefix_host = DI::baseUrl()->getHostname();
1294                 } else {
1295                         $prefix_host = '';
1296
1297                         // We are only storing the post so we create a GUID from the original hostname.
1298                         if (!empty($item['author-link'])) {
1299                                 $parsed = parse_url($item['author-link']);
1300                                 if (!empty($parsed['host'])) {
1301                                         $prefix_host = $parsed['host'];
1302                                 }
1303                         }
1304
1305                         if (empty($prefix_host) && !empty($item['plink'])) {
1306                                 $parsed = parse_url($item['plink']);
1307                                 if (!empty($parsed['host'])) {
1308                                         $prefix_host = $parsed['host'];
1309                                 }
1310                         }
1311
1312                         if (empty($prefix_host) && !empty($item['uri'])) {
1313                                 $parsed = parse_url($item['uri']);
1314                                 if (!empty($parsed['host'])) {
1315                                         $prefix_host = $parsed['host'];
1316                                 }
1317                         }
1318
1319                         // Is it in the format data@host.tld? - Used for mail contacts
1320                         if (empty($prefix_host) && !empty($item['author-link']) && strstr($item['author-link'], '@')) {
1321                                 $mailparts = explode('@', $item['author-link']);
1322                                 $prefix_host = array_pop($mailparts);
1323                         }
1324                 }
1325
1326                 if (!empty($item['plink'])) {
1327                         $guid = self::guidFromUri($item['plink'], $prefix_host);
1328                 } elseif (!empty($item['uri'])) {
1329                         $guid = self::guidFromUri($item['uri'], $prefix_host);
1330                 } else {
1331                         $guid = System::createUUID(hash('crc32', $prefix_host));
1332                 }
1333
1334                 return $guid;
1335         }
1336
1337         private static function contactId($item)
1338         {
1339                 if (!empty($item['contact-id']) && DBA::exists('contact', ['self' => true, 'id' => $item['contact-id']])) {
1340                         return $item['contact-id'];
1341                 } elseif (($item['gravity'] == GRAVITY_PARENT) && !empty($item['uid']) && !empty($item['contact-id']) && Contact::isSharing($item['contact-id'], $item['uid'])) {
1342                         return $item['contact-id'];
1343                 } elseif (!empty($item['uid']) && !Contact::isSharing($item['author-id'], $item['uid'])) {
1344                         return $item['author-id'];
1345                 } elseif (!empty($item['contact-id'])) {
1346                         return $item['contact-id'];
1347                 } else {
1348                         $contact_id = Contact::getIdForURL($item['author-link'], $item['uid']);
1349                         if (!empty($contact_id)) {
1350                                 return $contact_id;
1351                         }
1352                 }
1353                 return $item['author-id'];
1354         }
1355
1356         // This function will finally cover most of the preparation functionality in mod/item.php
1357         public static function prepare(&$item)
1358         {
1359                 /*
1360                  * @TODO: Unused code triggering inspection errors
1361                  *
1362                 $data = BBCode::getAttachmentData($item['body']);
1363                 if ((preg_match_all("/\[bookmark\=([^\]]*)\](.*?)\[\/bookmark\]/ism", $item['body'], $match, PREG_SET_ORDER) || isset($data["type"]))
1364                         && ($posttype != Item::PT_PERSONAL_NOTE)) {
1365                         $posttype = Item::PT_PAGE;
1366                         $objecttype = ACTIVITY_OBJ_BOOKMARK;
1367                 }
1368                  */
1369         }
1370
1371         /**
1372          * Write an item array into a spool file to be inserted later.
1373          * This command is called whenever there are issues storing an item.
1374          *
1375          * @param array $item The item fields that are to be inserted
1376          * @throws \Exception
1377          */
1378         private static function spool($orig_item)
1379         {
1380                 // Now we store the data in the spool directory
1381                 // We use "microtime" to keep the arrival order and "mt_rand" to avoid duplicates
1382                 $file = 'item-' . round(microtime(true) * 10000) . '-' . mt_rand() . '.msg';
1383
1384                 $spoolpath = get_spoolpath();
1385                 if ($spoolpath != "") {
1386                         $spool = $spoolpath . '/' . $file;
1387
1388                         file_put_contents($spool, json_encode($orig_item));
1389                         Logger::warning("Item wasn't stored - Item was spooled into file", ['file' => $file]);
1390                 }
1391         }
1392
1393         public static function insert($item, $force_parent = false, $notify = false, $dontcache = false)
1394         {
1395                 $orig_item = $item;
1396
1397                 $priority = PRIORITY_HIGH;
1398
1399                 // If it is a posting where users should get notifications, then define it as wall posting
1400                 if ($notify) {
1401                         $item['wall'] = 1;
1402                         $item['origin'] = 1;
1403                         $item['network'] = Protocol::DFRN;
1404                         $item['protocol'] = Conversation::PARCEL_DFRN;
1405
1406                         if (is_int($notify)) {
1407                                 $priority = $notify;
1408                         }
1409                 } else {
1410                         $item['network'] = trim(($item['network'] ?? '') ?: Protocol::PHANTOM);
1411                 }
1412
1413                 $item['guid'] = self::guid($item, $notify);
1414                 $item['uri'] = Strings::escapeTags(trim(($item['uri'] ?? '') ?: self::newURI($item['uid'], $item['guid'])));
1415
1416                 // Store URI data
1417                 $item['uri-id'] = ItemURI::insert(['uri' => $item['uri'], 'guid' => $item['guid']]);
1418
1419                 // Store conversation data
1420                 $item = Conversation::insert($item);
1421
1422                 /*
1423                  * If a Diaspora signature structure was passed in, pull it out of the
1424                  * item array and set it aside for later storage.
1425                  */
1426
1427                 $dsprsig = null;
1428                 if (isset($item['dsprsig'])) {
1429                         $encoded_signature = $item['dsprsig'];
1430                         $dsprsig = json_decode(base64_decode($item['dsprsig']));
1431                         unset($item['dsprsig']);
1432                 }
1433
1434                 $diaspora_signed_text = '';
1435                 if (isset($item['diaspora_signed_text'])) {
1436                         $diaspora_signed_text = $item['diaspora_signed_text'];
1437                         unset($item['diaspora_signed_text']);
1438                 }
1439
1440                 // Converting the plink
1441                 /// @TODO Check if this is really still needed
1442                 if ($item['network'] == Protocol::OSTATUS) {
1443                         if (isset($item['plink'])) {
1444                                 $item['plink'] = OStatus::convertHref($item['plink']);
1445                         } elseif (isset($item['uri'])) {
1446                                 $item['plink'] = OStatus::convertHref($item['uri']);
1447                         }
1448                 }
1449
1450                 if (!empty($item['thr-parent'])) {
1451                         $item['parent-uri'] = $item['thr-parent'];
1452                 }
1453
1454                 $activity = DI::activity();
1455
1456                 if (isset($item['gravity'])) {
1457                         $item['gravity'] = intval($item['gravity']);
1458                 } elseif ($item['parent-uri'] === $item['uri']) {
1459                         $item['gravity'] = GRAVITY_PARENT;
1460                 } elseif ($activity->match($item['verb'], Activity::POST)) {
1461                         $item['gravity'] = GRAVITY_COMMENT;
1462                 } elseif ($activity->match($item['verb'], Activity::FOLLOW)) {
1463                         $item['gravity'] = GRAVITY_ACTIVITY;
1464                 } else {
1465                         $item['gravity'] = GRAVITY_UNKNOWN;   // Should not happen
1466                         Logger::log('Unknown gravity for verb: ' . $item['verb'], Logger::DEBUG);
1467                 }
1468
1469                 $uid = intval($item['uid']);
1470
1471                 // check for create date and expire time
1472                 $expire_interval = DI::config()->get('system', 'dbclean-expire-days', 0);
1473
1474                 $user = DBA::selectFirst('user', ['expire'], ['uid' => $uid]);
1475                 if (DBA::isResult($user) && ($user['expire'] > 0) && (($user['expire'] < $expire_interval) || ($expire_interval == 0))) {
1476                         $expire_interval = $user['expire'];
1477                 }
1478
1479                 if (($expire_interval > 0) && !empty($item['created'])) {
1480                         $expire_date = time() - ($expire_interval * 86400);
1481                         $created_date = strtotime($item['created']);
1482                         if ($created_date < $expire_date) {
1483                                 Logger::notice('Item created before expiration interval.', [
1484                                         'created' => date('c', $created_date),
1485                                         'expired' => date('c', $expire_date),
1486                                         '$item' => $item
1487                                 ]);
1488                                 return 0;
1489                         }
1490                 }
1491
1492                 /*
1493                  * Do we already have this item?
1494                  * We have to check several networks since Friendica posts could be repeated
1495                  * via OStatus (maybe Diasporsa as well)
1496                  */
1497                 if (empty($item['network']) || in_array($item['network'], Protocol::FEDERATED)) {
1498                         $condition = ["`uri` = ? AND `uid` = ? AND `network` IN (?, ?, ?, ?)",
1499                                 trim($item['uri']), $item['uid'],
1500                                 Protocol::ACTIVITYPUB, Protocol::DIASPORA, Protocol::DFRN, Protocol::OSTATUS];
1501                         $existing = self::selectFirst(['id', 'network'], $condition);
1502                         if (DBA::isResult($existing)) {
1503                                 // We only log the entries with a different user id than 0. Otherwise we would have too many false positives
1504                                 if ($uid != 0) {
1505                                         Logger::notice('Item already existed for user', [
1506                                                 'uri' => $item['uri'],
1507                                                 'uid' => $uid,
1508                                                 'network' => $item['network'],
1509                                                 'existing_id' => $existing["id"],
1510                                                 'existing_network' => $existing["network"]
1511                                         ]);
1512                                 }
1513
1514                                 return $existing["id"];
1515                         }
1516                 }
1517
1518                 $item['wall']          = intval($item['wall'] ?? 0);
1519                 $item['extid']         = trim($item['extid'] ?? '');
1520                 $item['author-name']   = trim($item['author-name'] ?? '');
1521                 $item['author-link']   = trim($item['author-link'] ?? '');
1522                 $item['author-avatar'] = trim($item['author-avatar'] ?? '');
1523                 $item['owner-name']    = trim($item['owner-name'] ?? '');
1524                 $item['owner-link']    = trim($item['owner-link'] ?? '');
1525                 $item['owner-avatar']  = trim($item['owner-avatar'] ?? '');
1526                 $item['received']      = (isset($item['received'])  ? DateTimeFormat::utc($item['received'])  : DateTimeFormat::utcNow());
1527                 $item['created']       = (isset($item['created'])   ? DateTimeFormat::utc($item['created'])   : $item['received']);
1528                 $item['edited']        = (isset($item['edited'])    ? DateTimeFormat::utc($item['edited'])    : $item['created']);
1529                 $item['changed']       = (isset($item['changed'])   ? DateTimeFormat::utc($item['changed'])   : $item['created']);
1530                 $item['commented']     = (isset($item['commented']) ? DateTimeFormat::utc($item['commented']) : $item['created']);
1531                 $item['title']         = trim($item['title'] ?? '');
1532                 $item['location']      = trim($item['location'] ?? '');
1533                 $item['coord']         = trim($item['coord'] ?? '');
1534                 $item['visible']       = (isset($item['visible']) ? intval($item['visible']) : 1);
1535                 $item['deleted']       = 0;
1536                 $item['parent-uri']    = trim(($item['parent-uri'] ?? '') ?: $item['uri']);
1537                 $item['post-type']     = ($item['post-type'] ?? '') ?: self::PT_ARTICLE;
1538                 $item['verb']          = trim($item['verb'] ?? '');
1539                 $item['object-type']   = trim($item['object-type'] ?? '');
1540                 $item['object']        = trim($item['object'] ?? '');
1541                 $item['target-type']   = trim($item['target-type'] ?? '');
1542                 $item['target']        = trim($item['target'] ?? '');
1543                 $item['plink']         = trim($item['plink'] ?? '');
1544                 $item['allow_cid']     = trim($item['allow_cid'] ?? '');
1545                 $item['allow_gid']     = trim($item['allow_gid'] ?? '');
1546                 $item['deny_cid']      = trim($item['deny_cid'] ?? '');
1547                 $item['deny_gid']      = trim($item['deny_gid'] ?? '');
1548                 $item['private']       = intval($item['private'] ?? self::PUBLIC);
1549                 $item['body']          = trim($item['body'] ?? '');
1550                 $item['tag']           = trim($item['tag'] ?? '');
1551                 $item['attach']        = trim($item['attach'] ?? '');
1552                 $item['app']           = trim($item['app'] ?? '');
1553                 $item['origin']        = intval($item['origin'] ?? 0);
1554                 $item['postopts']      = trim($item['postopts'] ?? '');
1555                 $item['resource-id']   = trim($item['resource-id'] ?? '');
1556                 $item['event-id']      = intval($item['event-id'] ?? 0);
1557                 $item['inform']        = trim($item['inform'] ?? '');
1558                 $item['file']          = trim($item['file'] ?? '');
1559
1560                 // When there is no content then we don't post it
1561                 if ($item['body'].$item['title'] == '') {
1562                         Logger::notice('No body, no title.');
1563                         return 0;
1564                 }
1565
1566                 self::addLanguageToItemArray($item);
1567
1568                 // Items cannot be stored before they happen ...
1569                 if ($item['created'] > DateTimeFormat::utcNow()) {
1570                         $item['created'] = DateTimeFormat::utcNow();
1571                 }
1572
1573                 // We haven't invented time travel by now.
1574                 if ($item['edited'] > DateTimeFormat::utcNow()) {
1575                         $item['edited'] = DateTimeFormat::utcNow();
1576                 }
1577
1578                 $item['plink'] = ($item['plink'] ?? '') ?: DI::baseUrl() . '/display/' . urlencode($item['guid']);
1579
1580                 $default = ['url' => $item['author-link'], 'name' => $item['author-name'],
1581                         'photo' => $item['author-avatar'], 'network' => $item['network']];
1582
1583                 $item['author-id'] = ($item['author-id'] ?? 0) ?: Contact::getIdForURL($item['author-link'], 0, false, $default);
1584
1585                 if (Contact::isBlocked($item['author-id'])) {
1586                         Logger::notice('Author is blocked node-wide', ['author-link' => $item['author-link'], 'item-uri' => $item['uri']]);
1587                         return 0;
1588                 }
1589
1590                 if (!empty($item['author-link']) && Network::isUrlBlocked($item['author-link'])) {
1591                         Logger::notice('Author server is blocked', ['author-link' => $item['author-link'], 'item-uri' => $item['uri']]);
1592                         return 0;
1593                 }
1594
1595                 if (!empty($uid) && Contact::isBlockedByUser($item['author-id'], $uid)) {
1596                         Logger::notice('Author is blocked by user', ['author-link' => $item['author-link'], 'uid' => $uid, 'item-uri' => $item['uri']]);
1597                         return 0;
1598                 }
1599
1600                 $default = ['url' => $item['owner-link'], 'name' => $item['owner-name'],
1601                         'photo' => $item['owner-avatar'], 'network' => $item['network']];
1602
1603                 $item['owner-id'] = ($item['owner-id'] ?? 0) ?: Contact::getIdForURL($item['owner-link'], 0, false, $default);
1604
1605                 if (Contact::isBlocked($item['owner-id'])) {
1606                         Logger::notice('Owner is blocked node-wide', ['owner-link' => $item['owner-link'], 'item-uri' => $item['uri']]);
1607                         return 0;
1608                 }
1609
1610                 if (!empty($item['owner-link']) && Network::isUrlBlocked($item['owner-link'])) {
1611                         Logger::notice('Owner server is blocked', ['owner-link' => $item['owner-link'], 'item-uri' => $item['uri']]);
1612                         return 0;
1613                 }
1614
1615                 if (!empty($uid) && Contact::isBlockedByUser($item['owner-id'], $uid)) {
1616                         Logger::notice('Owner is blocked by user', ['owner-link' => $item['owner-link'], 'uid' => $uid, 'item-uri' => $item['uri']]);
1617                         return 0;
1618                 }
1619
1620                 // The causer is set during a thread completion, for example because of a reshare. It countains the responsible actor.
1621                 if (!empty($uid) && !empty($item['causer-id']) && Contact::isBlockedByUser($item['causer-id'], $uid)) {
1622                         Logger::notice('Causer is blocked by user', ['causer-link' => $item['causer-link'], 'uid' => $uid, 'item-uri' => $item['uri']]);
1623                         return 0;
1624                 }
1625
1626                 if (!empty($uid) && !empty($item['causer-id']) && ($item['parent-uri'] == $item['uri']) && Contact::isIgnoredByUser($item['causer-id'], $uid)) {
1627                         Logger::notice('Causer is ignored by user', ['causer-link' => $item['causer-link'], 'uid' => $uid, 'item-uri' => $item['uri']]);
1628                         return 0;
1629                 }
1630
1631                 // We don't store the causer, we only have it here for the checks above
1632                 unset($item['causer-id']);
1633                 unset($item['causer-link']);
1634
1635                 // The contact-id should be set before "self::insert" was called - but there seems to be issues sometimes
1636                 $item["contact-id"] = self::contactId($item);
1637
1638                 if ($item['network'] == Protocol::PHANTOM) {
1639                         $item['network'] = Protocol::DFRN;
1640                         Logger::notice('Missing network, setting to {network}.', [
1641                                 'uri' => $item["uri"],
1642                                 'network' => $item['network'],
1643                                 'callstack' => System::callstack()
1644                         ]);
1645                 }
1646
1647                 // Checking if there is already an item with the same guid
1648                 $condition = ['guid' => $item['guid'], 'network' => $item['network'], 'uid' => $item['uid']];
1649                 if (self::exists($condition)) {
1650                         Logger::notice('Found already existing item', [
1651                                 'guid' => $item['guid'],
1652                                 'uid' => $item['uid'],
1653                                 'network' => $item['network']
1654                         ]);
1655                         return 0;
1656                 }
1657
1658                 if ($item['verb'] == Activity::FOLLOW) {
1659                         if (!$item['origin'] && ($item['author-id'] == Contact::getPublicIdByUserId($uid))) {
1660                                 // Our own follow request can be relayed to us. We don't store it to avoid notification chaos.
1661                                 Logger::log("Follow: Don't store not origin follow request from us for " . $item['parent-uri'], Logger::DEBUG);
1662                                 return 0;
1663                         }
1664
1665                         $condition = ['verb' => Activity::FOLLOW, 'uid' => $item['uid'],
1666                                 'parent-uri' => $item['parent-uri'], 'author-id' => $item['author-id']];
1667                         if (self::exists($condition)) {
1668                                 // It happens that we receive multiple follow requests by the same author - we only store one.
1669                                 Logger::log('Follow: Found existing follow request from author ' . $item['author-id'] . ' for ' . $item['parent-uri'], Logger::DEBUG);
1670                                 return 0;
1671                         }
1672                 }
1673
1674                 // Check for hashtags in the body and repair or add hashtag links
1675                 self::setHashtags($item);
1676
1677                 $item['thr-parent'] = $item['parent-uri'];
1678
1679                 $notify_type = Delivery::POST;
1680                 $allow_cid = '';
1681                 $allow_gid = '';
1682                 $deny_cid  = '';
1683                 $deny_gid  = '';
1684
1685                 if ($item['parent-uri'] === $item['uri']) {
1686                         $parent_id = 0;
1687                         $parent_deleted = 0;
1688                         $allow_cid = $item['allow_cid'];
1689                         $allow_gid = $item['allow_gid'];
1690                         $deny_cid  = $item['deny_cid'];
1691                         $deny_gid  = $item['deny_gid'];
1692                 } else {
1693                         // find the parent and snarf the item id and ACLs
1694                         // and anything else we need to inherit
1695
1696                         $fields = ['uri', 'parent-uri', 'id', 'deleted',
1697                                 'allow_cid', 'allow_gid', 'deny_cid', 'deny_gid',
1698                                 'wall', 'private', 'forum_mode', 'origin', 'author-id'];
1699                         $condition = ['uri' => $item['parent-uri'], 'uid' => $item['uid']];
1700                         $params = ['order' => ['id' => false]];
1701                         $parent = self::selectFirst($fields, $condition, $params);
1702
1703                         if (DBA::isResult($parent)) {
1704                                 // is the new message multi-level threaded?
1705                                 // even though we don't support it now, preserve the info
1706                                 // and re-attach to the conversation parent.
1707
1708                                 if ($parent['uri'] != $parent['parent-uri']) {
1709                                         $item['parent-uri'] = $parent['parent-uri'];
1710
1711                                         $condition = ['uri' => $item['parent-uri'],
1712                                                 'parent-uri' => $item['parent-uri'],
1713                                                 'uid' => $item['uid']];
1714                                         $params = ['order' => ['id' => false]];
1715                                         $toplevel_parent = self::selectFirst($fields, $condition, $params);
1716
1717                                         if (DBA::isResult($toplevel_parent)) {
1718                                                 $parent = $toplevel_parent;
1719                                         }
1720                                 }
1721
1722                                 $parent_id      = $parent['id'];
1723                                 $parent_deleted = $parent['deleted'];
1724                                 $allow_cid      = $parent['allow_cid'];
1725                                 $allow_gid      = $parent['allow_gid'];
1726                                 $deny_cid       = $parent['deny_cid'];
1727                                 $deny_gid       = $parent['deny_gid'];
1728                                 $item['wall']   = $parent['wall'];
1729
1730                                 /*
1731                                  * If the parent is private, force privacy for the entire conversation
1732                                  * This differs from the above settings as it subtly allows comments from
1733                                  * email correspondents to be private even if the overall thread is not.
1734                                  */
1735                                 if ($parent['private']) {
1736                                         $item['private'] = $parent['private'];
1737                                 }
1738
1739                                 /*
1740                                  * Edge case. We host a public forum that was originally posted to privately.
1741                                  * The original author commented, but as this is a comment, the permissions
1742                                  * weren't fixed up so it will still show the comment as private unless we fix it here.
1743                                  */
1744                                 if ((intval($parent['forum_mode']) == 1) && ($parent['private'] != self::PUBLIC)) {
1745                                         $item['private'] = self::PUBLIC;
1746                                 }
1747
1748                                 // If its a post that originated here then tag the thread as "mention"
1749                                 if ($item['origin'] && $item['uid']) {
1750                                         DBA::update('thread', ['mention' => true], ['iid' => $parent_id]);
1751                                         Logger::log('tagged thread ' . $parent_id . ' as mention for user ' . $item['uid'], Logger::DEBUG);
1752                                 }
1753
1754                                 // Update the contact relations
1755                                 if ($item['author-id'] != $parent['author-id']) {
1756                                         DBA::update('contact-relation', ['last-interaction' => $item['created']], ['cid' => $parent['author-id'], 'relation-cid' => $item['author-id']], true);
1757                                 }
1758                         } else {
1759                                 /*
1760                                  * Allow one to see reply tweets from status.net even when
1761                                  * we don't have or can't see the original post.
1762                                  */
1763                                 if ($force_parent) {
1764                                         Logger::log('$force_parent=true, reply converted to top-level post.');
1765                                         $parent_id = 0;
1766                                         $item['parent-uri'] = $item['uri'];
1767                                         $item['gravity'] = GRAVITY_PARENT;
1768                                 } else {
1769                                         Logger::log('item parent '.$item['parent-uri'].' for '.$item['uid'].' was not found - ignoring item');
1770                                         return 0;
1771                                 }
1772
1773                                 $parent_deleted = 0;
1774                         }
1775                 }
1776
1777                 if (stristr($item['verb'], Activity::POKE)) {
1778                         $notify_type = Delivery::POKE;
1779                 }
1780
1781                 $item['parent-uri-id'] = ItemURI::getIdByURI($item['parent-uri']);
1782                 $item['thr-parent-id'] = ItemURI::getIdByURI($item['thr-parent']);
1783
1784                 $condition = ["`uri` = ? AND `network` IN (?, ?) AND `uid` = ?",
1785                         $item['uri'], $item['network'], Protocol::DFRN, $item['uid']];
1786                 if (self::exists($condition)) {
1787                         Logger::log('duplicated item with the same uri found. '.print_r($item,true));
1788                         return 0;
1789                 }
1790
1791                 // On Friendica and Diaspora the GUID is unique
1792                 if (in_array($item['network'], [Protocol::DFRN, Protocol::DIASPORA])) {
1793                         $condition = ['guid' => $item['guid'], 'uid' => $item['uid']];
1794                         if (self::exists($condition)) {
1795                                 Logger::log('duplicated item with the same guid found. '.print_r($item,true));
1796                                 return 0;
1797                         }
1798                 } elseif ($item['network'] == Protocol::OSTATUS) {
1799                         // Check for an existing post with the same content. There seems to be a problem with OStatus.
1800                         $condition = ["`body` = ? AND `network` = ? AND `created` = ? AND `contact-id` = ? AND `uid` = ?",
1801                                         $item['body'], $item['network'], $item['created'], $item['contact-id'], $item['uid']];
1802                         if (self::exists($condition)) {
1803                                 Logger::log('duplicated item with the same body found. '.print_r($item,true));
1804                                 return 0;
1805                         }
1806                 }
1807
1808                 // Is this item available in the global items (with uid=0)?
1809                 if ($item["uid"] == 0) {
1810                         $item["global"] = true;
1811
1812                         // Set the global flag on all items if this was a global item entry
1813                         DBA::update('item', ['global' => true], ['uri' => $item["uri"]]);
1814                 } else {
1815                         $item["global"] = self::exists(['uid' => 0, 'uri' => $item["uri"]]);
1816                 }
1817
1818                 // ACL settings
1819                 if (strlen($allow_cid) || strlen($allow_gid) || strlen($deny_cid) || strlen($deny_gid)) {
1820                         $private = self::PRIVATE;
1821                 } else {
1822                         $private = $item['private'];
1823                 }
1824
1825                 $item["allow_cid"] = $allow_cid;
1826                 $item["allow_gid"] = $allow_gid;
1827                 $item["deny_cid"] = $deny_cid;
1828                 $item["deny_gid"] = $deny_gid;
1829                 $item["private"] = $private;
1830                 $item["deleted"] = $parent_deleted;
1831
1832                 // Fill the cache field
1833                 self::putInCache($item);
1834
1835                 if ($notify) {
1836                         $item['edit'] = false;
1837                         $item['parent'] = $parent_id;
1838                         Hook::callAll('post_local', $item);
1839                         unset($item['edit']);
1840                         unset($item['parent']);
1841                 } else {
1842                         Hook::callAll('post_remote', $item);
1843                 }
1844
1845                 // This array field is used to trigger some automatic reactions
1846                 // It is mainly used in the "post_local" hook.
1847                 unset($item['api_source']);
1848
1849                 if (!empty($item['cancel'])) {
1850                         Logger::log('post cancelled by addon.');
1851                         return 0;
1852                 }
1853
1854                 /*
1855                  * Check for already added items.
1856                  * There is a timing issue here that sometimes creates double postings.
1857                  * An unique index would help - but the limitations of MySQL (maximum size of index values) prevent this.
1858                  */
1859                 if ($item["uid"] == 0) {
1860                         if (self::exists(['uri' => trim($item['uri']), 'uid' => 0])) {
1861                                 Logger::log('Global item already stored. URI: '.$item['uri'].' on network '.$item['network'], Logger::DEBUG);
1862                                 return 0;
1863                         }
1864                 }
1865
1866                 Logger::log('' . print_r($item,true), Logger::DATA);
1867
1868                 if (array_key_exists('tag', $item)) {
1869                         $tags = $item['tag'];
1870                         unset($item['tag']);
1871                 } else {
1872                         $tags = '';
1873                 }
1874
1875                 if (array_key_exists('file', $item)) {
1876                         $files = $item['file'];
1877                         unset($item['file']);
1878                 } else {
1879                         $files = '';
1880                 }
1881
1882                 // Creates or assigns the permission set
1883                 $item['psid'] = PermissionSet::getIdFromACL(
1884                         $item['uid'],
1885                         $item['allow_cid'],
1886                         $item['allow_gid'],
1887                         $item['deny_cid'],
1888                         $item['deny_gid']
1889                 );
1890
1891                 $item['allow_cid'] = null;
1892                 $item['allow_gid'] = null;
1893                 $item['deny_cid'] = null;
1894                 $item['deny_gid'] = null;
1895
1896                 // We are doing this outside of the transaction to avoid timing problems
1897                 if (!self::insertActivity($item)) {
1898                         self::insertContent($item);
1899                 }
1900
1901                 $delivery_data = ItemDeliveryData::extractFields($item);
1902
1903                 unset($item['postopts']);
1904                 unset($item['inform']);
1905
1906                 // These fields aren't stored anymore in the item table, they are fetched upon request
1907                 unset($item['author-link']);
1908                 unset($item['author-name']);
1909                 unset($item['author-avatar']);
1910                 unset($item['author-network']);
1911
1912                 unset($item['owner-link']);
1913                 unset($item['owner-name']);
1914                 unset($item['owner-avatar']);
1915
1916                 $like_no_comment = DI::config()->get('system', 'like_no_comment');
1917
1918                 DBA::transaction();
1919                 $ret = DBA::insert('item', $item);
1920
1921                 // When the item was successfully stored we fetch the ID of the item.
1922                 if (DBA::isResult($ret)) {
1923                         $current_post = DBA::lastInsertId();
1924                 } else {
1925                         // This can happen - for example - if there are locking timeouts.
1926                         DBA::rollback();
1927
1928                         // Store the data into a spool file so that we can try again later.
1929                         self::spool($orig_item);
1930                         return 0;
1931                 }
1932
1933                 if ($current_post == 0) {
1934                         // This is one of these error messages that never should occur.
1935                         Logger::log("couldn't find created item - we better quit now.");
1936                         DBA::rollback();
1937                         return 0;
1938                 }
1939
1940                 // How much entries have we created?
1941                 // We wouldn't need this query when we could use an unique index - but MySQL has length problems with them.
1942                 $entries = DBA::count('item', ['uri' => $item['uri'], 'uid' => $item['uid'], 'network' => $item['network']]);
1943
1944                 if ($entries > 1) {
1945                         // There are duplicates. We delete our just created entry.
1946                         Logger::info('Delete duplicated item', ['id' => $current_post, 'uri' => $item['uri'], 'uid' => $item['uid'], 'guid' => $item['guid']]);
1947
1948                         // Yes, we could do a rollback here - but we are having many users with MyISAM.
1949                         DBA::delete('item', ['id' => $current_post]);
1950                         DBA::commit();
1951                         return 0;
1952                 } elseif ($entries == 0) {
1953                         // This really should never happen since we quit earlier if there were problems.
1954                         Logger::log("Something is terribly wrong. We haven't found our created entry.");
1955                         DBA::rollback();
1956                         return 0;
1957                 }
1958
1959                 Logger::log('created item '.$current_post);
1960
1961                 if (!$parent_id || ($item['parent-uri'] === $item['uri'])) {
1962                         $parent_id = $current_post;
1963                 }
1964
1965                 // Set parent id
1966                 DBA::update('item', ['parent' => $parent_id], ['id' => $current_post]);
1967
1968                 $item['id'] = $current_post;
1969                 $item['parent'] = $parent_id;
1970
1971                 // update the commented timestamp on the parent
1972                 // Only update "commented" if it is really a comment
1973                 if (($item['gravity'] != GRAVITY_ACTIVITY) || !$like_no_comment) {
1974                         DBA::update('item', ['commented' => DateTimeFormat::utcNow(), 'changed' => DateTimeFormat::utcNow()], ['id' => $parent_id]);
1975                 } else {
1976                         DBA::update('item', ['changed' => DateTimeFormat::utcNow()], ['id' => $parent_id]);
1977                 }
1978
1979                 if ($dsprsig) {
1980                         /*
1981                          * Friendica servers lower than 3.4.3-2 had double encoded the signature ...
1982                          * We can check for this condition when we decode and encode the stuff again.
1983                          */
1984                         if (base64_encode(base64_decode(base64_decode($dsprsig->signature))) == base64_decode($dsprsig->signature)) {
1985                                 $dsprsig->signature = base64_decode($dsprsig->signature);
1986                                 Logger::log("Repaired double encoded signature from handle ".$dsprsig->signer, Logger::DEBUG);
1987                         }
1988
1989                         if (!empty($dsprsig->signed_text) && empty($dsprsig->signature) && empty($dsprsig->signer)) {
1990                                 DBA::insert('diaspora-interaction', ['uri-id' => $item['uri-id'], 'interaction' => $dsprsig->signed_text], true);
1991                         } else {
1992                                 // The other fields are used by very old Friendica servers, so we currently store them differently
1993                                 DBA::insert('sign', ['iid' => $current_post, 'signed_text' => $dsprsig->signed_text,
1994                                         'signature' => $dsprsig->signature, 'signer' => $dsprsig->signer]);
1995                         }
1996                 }
1997
1998                 if (!empty($diaspora_signed_text)) {
1999                         DBA::insert('diaspora-interaction', ['uri-id' => $item['uri-id'], 'interaction' => $diaspora_signed_text], true);
2000                 }
2001
2002                 if ($item['parent-uri'] === $item['uri']) {
2003                         self::addThread($current_post);
2004                 } else {
2005                         self::updateThread($parent_id);
2006                 }
2007
2008                 if (!empty($item['origin']) || !empty($item['wall']) || !empty($delivery_data['postopts']) || !empty($delivery_data['inform'])) {
2009                         ItemDeliveryData::insert($current_post, $delivery_data);
2010                 }
2011
2012                 DBA::commit();
2013
2014                 /*
2015                  * Due to deadlock issues with the "term" table we are doing these steps after the commit.
2016                  * This is not perfect - but a workable solution until we found the reason for the problem.
2017                  */
2018                 if (!empty($tags)) {
2019                         Term::insertFromTagFieldByItemId($current_post, $tags);
2020                 }
2021
2022                 if (!empty($files)) {
2023                         Term::insertFromFileFieldByItemId($current_post, $files);
2024                 }
2025
2026                 // In that function we check if this is a forum post. Additionally we delete the item under certain circumstances
2027                 if (self::tagDeliver($item['uid'], $current_post)) {
2028                         // Get the user information for the logging
2029                         $user = User::getById($uid);
2030
2031                         Logger::notice('Item had been deleted', ['id' => $current_post, 'user' => $uid, 'account-type' => $user['account-type']]);
2032                         return 0;
2033                 }
2034
2035                 if (!$dontcache) {
2036                         $posted_item = self::selectFirst(self::ITEM_FIELDLIST, ['id' => $current_post]);
2037                         if (DBA::isResult($posted_item)) {
2038                                 if ($notify) {
2039                                         Hook::callAll('post_local_end', $posted_item);
2040                                 } else {
2041                                         Hook::callAll('post_remote_end', $posted_item);
2042                                 }
2043                         } else {
2044                                 Logger::log('new item not found in DB, id ' . $current_post);
2045                         }
2046                 }
2047
2048                 if ($item['parent-uri'] === $item['uri']) {
2049                         self::addShadow($current_post);
2050                 } else {
2051                         self::addShadowPost($current_post);
2052                 }
2053
2054                 self::updateContact($item);
2055
2056                 UserItem::setNotification($current_post);
2057
2058                 check_user_notification($current_post);
2059
2060                 if ($notify || ($item['visible'] && ((!empty($parent) && $parent['origin']) || $item['origin']))) {
2061                         Worker::add(['priority' => $priority, 'dont_fork' => true], 'Notifier', $notify_type, $current_post);
2062                 }
2063
2064                 return $current_post;
2065         }
2066
2067         /**
2068          * Insert a new item content entry
2069          *
2070          * @param array $item The item fields that are to be inserted
2071          * @return bool
2072          * @throws \Exception
2073          */
2074         private static function insertActivity(&$item)
2075         {
2076                 $activity_index = self::activityToIndex($item['verb']);
2077
2078                 if ($activity_index < 0) {
2079                         return false;
2080                 }
2081
2082                 $fields = ['activity' => $activity_index, 'uri-hash' => (string)$item['uri-id'], 'uri-id' => $item['uri-id']];
2083
2084                 // We just remove everything that is content
2085                 foreach (array_merge(self::CONTENT_FIELDLIST, self::MIXED_CONTENT_FIELDLIST) as $field) {
2086                         unset($item[$field]);
2087                 }
2088
2089                 // To avoid timing problems, we are using locks.
2090                 $locked = DI::lock()->acquire('item_insert_activity');
2091                 if (!$locked) {
2092                         Logger::log("Couldn't acquire lock for URI " . $item['uri'] . " - proceeding anyway.");
2093                 }
2094
2095                 // Do we already have this content?
2096                 $item_activity = DBA::selectFirst('item-activity', ['id'], ['uri-id' => $item['uri-id']]);
2097                 if (DBA::isResult($item_activity)) {
2098                         $item['iaid'] = $item_activity['id'];
2099                         Logger::log('Fetched activity for URI ' . $item['uri'] . ' (' . $item['iaid'] . ')');
2100                 } elseif (DBA::insert('item-activity', $fields)) {
2101                         $item['iaid'] = DBA::lastInsertId();
2102                         Logger::log('Inserted activity for URI ' . $item['uri'] . ' (' . $item['iaid'] . ')');
2103                 } else {
2104                         // This shouldn't happen.
2105                         Logger::log('Could not insert activity for URI ' . $item['uri'] . ' - should not happen');
2106                         DI::lock()->release('item_insert_activity');
2107                         return false;
2108                 }
2109                 if ($locked) {
2110                         DI::lock()->release('item_insert_activity');
2111                 }
2112                 return true;
2113         }
2114
2115         /**
2116          * Insert a new item content entry
2117          *
2118          * @param array $item The item fields that are to be inserted
2119          * @throws \Exception
2120          */
2121         private static function insertContent(&$item)
2122         {
2123                 $fields = ['uri-plink-hash' => (string)$item['uri-id'], 'uri-id' => $item['uri-id']];
2124
2125                 foreach (array_merge(self::CONTENT_FIELDLIST, self::MIXED_CONTENT_FIELDLIST) as $field) {
2126                         if (isset($item[$field])) {
2127                                 $fields[$field] = $item[$field];
2128                                 unset($item[$field]);
2129                         }
2130                 }
2131
2132                 // To avoid timing problems, we are using locks.
2133                 $locked = DI::lock()->acquire('item_insert_content');
2134                 if (!$locked) {
2135                         Logger::log("Couldn't acquire lock for URI " . $item['uri'] . " - proceeding anyway.");
2136                 }
2137
2138                 // Do we already have this content?
2139                 $item_content = DBA::selectFirst('item-content', ['id'], ['uri-id' => $item['uri-id']]);
2140                 if (DBA::isResult($item_content)) {
2141                         $item['icid'] = $item_content['id'];
2142                         Logger::log('Fetched content for URI ' . $item['uri'] . ' (' . $item['icid'] . ')');
2143                 } elseif (DBA::insert('item-content', $fields)) {
2144                         $item['icid'] = DBA::lastInsertId();
2145                         Logger::log('Inserted content for URI ' . $item['uri'] . ' (' . $item['icid'] . ')');
2146                 } else {
2147                         // This shouldn't happen.
2148                         Logger::log('Could not insert content for URI ' . $item['uri'] . ' - should not happen');
2149                 }
2150                 if ($locked) {
2151                         DI::lock()->release('item_insert_content');
2152                 }
2153         }
2154
2155         /**
2156          * Update existing item content entries
2157          *
2158          * @param array $item      The item fields that are to be changed
2159          * @param array $condition The condition for finding the item content entries
2160          * @return bool
2161          * @throws \Exception
2162          */
2163         private static function updateActivity($item, $condition)
2164         {
2165                 if (empty($item['verb'])) {
2166                         return false;
2167                 }
2168                 $activity_index = self::activityToIndex($item['verb']);
2169
2170                 if ($activity_index < 0) {
2171                         return false;
2172                 }
2173
2174                 $fields = ['activity' => $activity_index];
2175
2176                 Logger::log('Update activity for ' . json_encode($condition));
2177
2178                 DBA::update('item-activity', $fields, $condition, true);
2179
2180                 return true;
2181         }
2182
2183         /**
2184          * Update existing item content entries
2185          *
2186          * @param array $item      The item fields that are to be changed
2187          * @param array $condition The condition for finding the item content entries
2188          * @throws \Exception
2189          */
2190         private static function updateContent($item, $condition)
2191         {
2192                 // We have to select only the fields from the "item-content" table
2193                 $fields = [];
2194                 foreach (array_merge(self::CONTENT_FIELDLIST, self::MIXED_CONTENT_FIELDLIST) as $field) {
2195                         if (isset($item[$field])) {
2196                                 $fields[$field] = $item[$field];
2197                         }
2198                 }
2199
2200                 if (empty($fields)) {
2201                         // when there are no fields at all, just use the condition
2202                         // This is to ensure that we always store content.
2203                         $fields = $condition;
2204                 }
2205
2206                 Logger::log('Update content for ' . json_encode($condition));
2207
2208                 DBA::update('item-content', $fields, $condition, true);
2209         }
2210
2211         /**
2212          * Distributes public items to the receivers
2213          *
2214          * @param integer $itemid      Item ID that should be added
2215          * @param string  $signed_text Original text (for Diaspora signatures), JSON encoded.
2216          * @throws \Exception
2217          */
2218         public static function distribute($itemid, $signed_text = '')
2219         {
2220                 $condition = ["`id` IN (SELECT `parent` FROM `item` WHERE `id` = ?)", $itemid];
2221                 $parent = self::selectFirst(['owner-id'], $condition);
2222                 if (!DBA::isResult($parent)) {
2223                         return;
2224                 }
2225
2226                 // Only distribute public items from native networks
2227                 $condition = ['id' => $itemid, 'uid' => 0,
2228                         'network' => array_merge(Protocol::FEDERATED ,['']),
2229                         'visible' => true, 'deleted' => false, 'moderated' => false, 'private' => [self::PUBLIC, self::UNLISTED]];
2230                 $item = self::selectFirst(self::ITEM_FIELDLIST, $condition);
2231                 if (!DBA::isResult($item)) {
2232                         return;
2233                 }
2234
2235                 $origin = $item['origin'];
2236
2237                 unset($item['id']);
2238                 unset($item['parent']);
2239                 unset($item['mention']);
2240                 unset($item['wall']);
2241                 unset($item['origin']);
2242                 unset($item['starred']);
2243
2244                 $users = [];
2245
2246                 /// @todo add a field "pcid" in the contact table that referrs to the public contact id.
2247                 $owner = DBA::selectFirst('contact', ['url', 'nurl', 'alias'], ['id' => $parent['owner-id']]);
2248                 if (!DBA::isResult($owner)) {
2249                         return;
2250                 }
2251
2252                 $condition = ['nurl' => $owner['nurl'], 'rel' => [Contact::SHARING, Contact::FRIEND]];
2253                 $contacts = DBA::select('contact', ['uid'], $condition);
2254                 while ($contact = DBA::fetch($contacts)) {
2255                         if ($contact['uid'] == 0) {
2256                                 continue;
2257                         }
2258
2259                         $users[$contact['uid']] = $contact['uid'];
2260                 }
2261                 DBA::close($contacts);
2262
2263                 $condition = ['alias' => $owner['url'], 'rel' => [Contact::SHARING, Contact::FRIEND]];
2264                 $contacts = DBA::select('contact', ['uid'], $condition);
2265                 while ($contact = DBA::fetch($contacts)) {
2266                         if ($contact['uid'] == 0) {
2267                                 continue;
2268                         }
2269
2270                         $users[$contact['uid']] = $contact['uid'];
2271                 }
2272                 DBA::close($contacts);
2273
2274                 if (!empty($owner['alias'])) {
2275                         $condition = ['url' => $owner['alias'], 'rel' => [Contact::SHARING, Contact::FRIEND]];
2276                         $contacts = DBA::select('contact', ['uid'], $condition);
2277                         while ($contact = DBA::fetch($contacts)) {
2278                                 if ($contact['uid'] == 0) {
2279                                         continue;
2280                                 }
2281
2282                                 $users[$contact['uid']] = $contact['uid'];
2283                         }
2284                         DBA::close($contacts);
2285                 }
2286
2287                 $origin_uid = 0;
2288
2289                 if ($item['uri'] != $item['parent-uri']) {
2290                         $parents = self::select(['uid', 'origin'], ["`uri` = ? AND `uid` != 0", $item['parent-uri']]);
2291                         while ($parent = self::fetch($parents)) {
2292                                 $users[$parent['uid']] = $parent['uid'];
2293                                 if ($parent['origin'] && !$origin) {
2294                                         $origin_uid = $parent['uid'];
2295                                 }
2296                         }
2297                 }
2298
2299                 foreach ($users as $uid) {
2300                         if ($origin_uid == $uid) {
2301                                 $item['diaspora_signed_text'] = $signed_text;
2302                         }
2303                         self::storeForUser($itemid, $item, $uid);
2304                 }
2305         }
2306
2307         /**
2308          * Store public items for the receivers
2309          *
2310          * @param integer $itemid Item ID that should be added
2311          * @param array   $item   The item entry that will be stored
2312          * @param integer $uid    The user that will receive the item entry
2313          * @throws \Exception
2314          */
2315         private static function storeForUser($itemid, $item, $uid)
2316         {
2317                 $item['uid'] = $uid;
2318                 $item['origin'] = 0;
2319                 $item['wall'] = 0;
2320                 if ($item['uri'] == $item['parent-uri']) {
2321                         $item['contact-id'] = Contact::getIdForURL($item['owner-link'], $uid);
2322                 } else {
2323                         $item['contact-id'] = Contact::getIdForURL($item['author-link'], $uid);
2324                 }
2325
2326                 if (empty($item['contact-id'])) {
2327                         $self = DBA::selectFirst('contact', ['id'], ['self' => true, 'uid' => $uid]);
2328                         if (!DBA::isResult($self)) {
2329                                 return;
2330                         }
2331                         $item['contact-id'] = $self['id'];
2332                 }
2333
2334                 /// @todo Handling of "event-id"
2335
2336                 $notify = false;
2337                 if ($item['uri'] == $item['parent-uri']) {
2338                         $contact = DBA::selectFirst('contact', [], ['id' => $item['contact-id'], 'self' => false]);
2339                         if (DBA::isResult($contact)) {
2340                                 $notify = self::isRemoteSelf($contact, $item);
2341                         }
2342                 }
2343
2344                 $distributed = self::insert($item, false, $notify, true);
2345
2346                 if (!$distributed) {
2347                         Logger::log("Distributed public item " . $itemid . " for user " . $uid . " wasn't stored", Logger::DEBUG);
2348                 } else {
2349                         Logger::log("Distributed public item " . $itemid . " for user " . $uid . " with id " . $distributed, Logger::DEBUG);
2350                 }
2351         }
2352
2353         /**
2354          * Add a shadow entry for a given item id that is a thread starter
2355          *
2356          * We store every public item entry additionally with the user id "0".
2357          * This is used for the community page and for the search.
2358          * It is planned that in the future we will store public item entries only once.
2359          *
2360          * @param integer $itemid Item ID that should be added
2361          * @throws \Exception
2362          */
2363         public static function addShadow($itemid)
2364         {
2365                 $fields = ['uid', 'private', 'moderated', 'visible', 'deleted', 'network', 'uri'];
2366                 $condition = ['id' => $itemid, 'parent' => [0, $itemid]];
2367                 $item = self::selectFirst($fields, $condition);
2368
2369                 if (!DBA::isResult($item)) {
2370                         return;
2371                 }
2372
2373                 // is it already a copy?
2374                 if (($itemid == 0) || ($item['uid'] == 0)) {
2375                         return;
2376                 }
2377
2378                 // Is it a visible public post?
2379                 if (!$item["visible"] || $item["deleted"] || $item["moderated"] || ($item["private"] == Item::PRIVATE)) {
2380                         return;
2381                 }
2382
2383                 // is it an entry from a connector? Only add an entry for natively connected networks
2384                 if (!in_array($item["network"], array_merge(Protocol::FEDERATED ,['']))) {
2385                         return;
2386                 }
2387
2388                 if (self::exists(['uri' => $item['uri'], 'uid' => 0])) {
2389                         return;
2390                 }
2391
2392                 $item = self::selectFirst(self::ITEM_FIELDLIST, ['id' => $itemid]);
2393
2394                 if (DBA::isResult($item)) {
2395                         // Preparing public shadow (removing user specific data)
2396                         $item['uid'] = 0;
2397                         unset($item['id']);
2398                         unset($item['parent']);
2399                         unset($item['wall']);
2400                         unset($item['mention']);
2401                         unset($item['origin']);
2402                         unset($item['starred']);
2403                         unset($item['postopts']);
2404                         unset($item['inform']);
2405                         if ($item['uri'] == $item['parent-uri']) {
2406                                 $item['contact-id'] = $item['owner-id'];
2407                         } else {
2408                                 $item['contact-id'] = $item['author-id'];
2409                         }
2410
2411                         $public_shadow = self::insert($item, false, false, true);
2412
2413                         Logger::log("Stored public shadow for thread ".$itemid." under id ".$public_shadow, Logger::DEBUG);
2414                 }
2415         }
2416
2417         /**
2418          * Add a shadow entry for a given item id that is a comment
2419          *
2420          * This function does the same like the function above - but for comments
2421          *
2422          * @param integer $itemid Item ID that should be added
2423          * @throws \Exception
2424          */
2425         public static function addShadowPost($itemid)
2426         {
2427                 $item = self::selectFirst(self::ITEM_FIELDLIST, ['id' => $itemid]);
2428                 if (!DBA::isResult($item)) {
2429                         return;
2430                 }
2431
2432                 // Is it a toplevel post?
2433                 if ($item['id'] == $item['parent']) {
2434                         self::addShadow($itemid);
2435                         return;
2436                 }
2437
2438                 // Is this a shadow entry?
2439                 if ($item['uid'] == 0) {
2440                         return;
2441                 }
2442
2443                 // Is there a shadow parent?
2444                 if (!self::exists(['uri' => $item['parent-uri'], 'uid' => 0])) {
2445                         return;
2446                 }
2447
2448                 // Is there already a shadow entry?
2449                 if (self::exists(['uri' => $item['uri'], 'uid' => 0])) {
2450                         return;
2451                 }
2452
2453                 // Save "origin" and "parent" state
2454                 $origin = $item['origin'];
2455                 $parent = $item['parent'];
2456
2457                 // Preparing public shadow (removing user specific data)
2458                 $item['uid'] = 0;
2459                 unset($item['id']);
2460                 unset($item['parent']);
2461                 unset($item['wall']);
2462                 unset($item['mention']);
2463                 unset($item['origin']);
2464                 unset($item['starred']);
2465                 unset($item['postopts']);
2466                 unset($item['inform']);
2467                 $item['contact-id'] = Contact::getIdForURL($item['author-link']);
2468
2469                 $public_shadow = self::insert($item, false, false, true);
2470
2471                 Logger::log("Stored public shadow for comment ".$item['uri']." under id ".$public_shadow, Logger::DEBUG);
2472
2473                 // If this was a comment to a Diaspora post we don't get our comment back.
2474                 // This means that we have to distribute the comment by ourselves.
2475                 if ($origin && self::exists(['id' => $parent, 'network' => Protocol::DIASPORA])) {
2476                         self::distribute($public_shadow);
2477                 }
2478         }
2479
2480         /**
2481          * Adds a language specification in a "language" element of given $arr.
2482          * Expects "body" element to exist in $arr.
2483          *
2484          * @param $item
2485          * @throws \Text_LanguageDetect_Exception
2486          */
2487         private static function addLanguageToItemArray(&$item)
2488         {
2489                 $naked_body = BBCode::toPlaintext($item['body'], false);
2490
2491                 $ld = new Text_LanguageDetect();
2492                 $ld->setNameMode(2);
2493                 $languages = $ld->detect($naked_body, 3);
2494
2495                 if (is_array($languages)) {
2496                         $item['language'] = json_encode($languages);
2497                 }
2498         }
2499
2500         /**
2501          * Creates an unique guid out of a given uri
2502          *
2503          * @param string $uri uri of an item entry
2504          * @param string $host hostname for the GUID prefix
2505          * @return string unique guid
2506          */
2507         public static function guidFromUri($uri, $host)
2508         {
2509                 // Our regular guid routine is using this kind of prefix as well
2510                 // We have to avoid that different routines could accidentally create the same value
2511                 $parsed = parse_url($uri);
2512
2513                 // We use a hash of the hostname as prefix for the guid
2514                 $guid_prefix = hash("crc32", $host);
2515
2516                 // Remove the scheme to make sure that "https" and "http" doesn't make a difference
2517                 unset($parsed["scheme"]);
2518
2519                 // Glue it together to be able to make a hash from it
2520                 $host_id = implode("/", $parsed);
2521
2522                 // We could use any hash algorithm since it isn't a security issue
2523                 $host_hash = hash("ripemd128", $host_id);
2524
2525                 return $guid_prefix.$host_hash;
2526         }
2527
2528         /**
2529          * generate an unique URI
2530          *
2531          * @param integer $uid  User id
2532          * @param string  $guid An existing GUID (Otherwise it will be generated)
2533          *
2534          * @return string
2535          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
2536          */
2537         public static function newURI($uid, $guid = "")
2538         {
2539                 if ($guid == "") {
2540                         $guid = System::createUUID();
2541                 }
2542
2543                 return DI::baseUrl()->get() . '/objects/' . $guid;
2544         }
2545
2546         /**
2547          * Set "success_update" and "last-item" to the date of the last time we heard from this contact
2548          *
2549          * This can be used to filter for inactive contacts.
2550          * Only do this for public postings to avoid privacy problems, since poco data is public.
2551          * Don't set this value if it isn't from the owner (could be an author that we don't know)
2552          *
2553          * @param array $arr Contains the just posted item record
2554          * @throws \Exception
2555          */
2556         private static function updateContact($arr)
2557         {
2558                 // Unarchive the author
2559                 $contact = DBA::selectFirst('contact', [], ['id' => $arr["author-id"]]);
2560                 if (DBA::isResult($contact)) {
2561                         Contact::unmarkForArchival($contact);
2562                 }
2563
2564                 // Unarchive the contact if it's not our own contact
2565                 $contact = DBA::selectFirst('contact', [], ['id' => $arr["contact-id"], 'self' => false]);
2566                 if (DBA::isResult($contact)) {
2567                         Contact::unmarkForArchival($contact);
2568                 }
2569
2570                 $update = (($arr['private'] != self::PRIVATE) && ((($arr['author-link'] ?? '') === ($arr['owner-link'] ?? '')) || ($arr["parent-uri"] === $arr["uri"])));
2571
2572                 // Is it a forum? Then we don't care about the rules from above
2573                 if (!$update && in_array($arr["network"], [Protocol::ACTIVITYPUB, Protocol::DFRN]) && ($arr["parent-uri"] === $arr["uri"])) {
2574                         if (DBA::exists('contact', ['id' => $arr['contact-id'], 'forum' => true])) {
2575                                 $update = true;
2576                         }
2577                 }
2578
2579                 if ($update) {
2580                         DBA::update('contact', ['success_update' => $arr['received'], 'last-item' => $arr['received']],
2581                                 ['id' => $arr['contact-id']]);
2582                 }
2583                 // Now do the same for the system wide contacts with uid=0
2584                 if ($arr['private'] != self::PRIVATE) {
2585                         DBA::update('contact', ['success_update' => $arr['received'], 'last-item' => $arr['received']],
2586                                 ['id' => $arr['owner-id']]);
2587
2588                         if ($arr['owner-id'] != $arr['author-id']) {
2589                                 DBA::update('contact', ['success_update' => $arr['received'], 'last-item' => $arr['received']],
2590                                         ['id' => $arr['author-id']]);
2591                         }
2592                 }
2593         }
2594
2595         public static function setHashtags(&$item)
2596         {
2597                 $tags = BBCode::getTags($item["body"]);
2598
2599                 // No hashtags?
2600                 if (!count($tags)) {
2601                         return false;
2602                 }
2603
2604                 // What happens in [code], stays in [code]!
2605                 // escape the # and the [
2606                 // hint: we will also get in trouble with #tags, when we want markdown in posts -> ### Headline 3
2607                 $item["body"] = preg_replace_callback("/\[code(.*?)\](.*?)\[\/code\]/ism",
2608                         function ($match) {
2609                                 // we truly ESCape all # and [ to prevent gettin weird tags in [code] blocks
2610                                 $find = ['#', '['];
2611                                 $replace = [chr(27).'sharp', chr(27).'leftsquarebracket'];
2612                                 return ("[code" . $match[1] . "]" . str_replace($find, $replace, $match[2]) . "[/code]");
2613                         }, $item["body"]);
2614
2615                 // This sorting is important when there are hashtags that are part of other hashtags
2616                 // Otherwise there could be problems with hashtags like #test and #test2
2617                 rsort($tags);
2618
2619                 $URLSearchString = "^\[\]";
2620
2621                 // All hashtags should point to the home server if "local_tags" is activated
2622                 if (DI::config()->get('system', 'local_tags')) {
2623                         $item["body"] = preg_replace("/#\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",
2624                                         "#[url=".DI::baseUrl()."/search?tag=$2]$2[/url]", $item["body"]);
2625
2626                         $item["tag"] = preg_replace("/#\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",
2627                                         "#[url=".DI::baseUrl()."/search?tag=$2]$2[/url]", $item["tag"]);
2628                 }
2629
2630                 // mask hashtags inside of url, bookmarks and attachments to avoid urls in urls
2631                 $item["body"] = preg_replace_callback("/\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",
2632                         function ($match) {
2633                                 return ("[url=" . str_replace("#", "&num;", $match[1]) . "]" . str_replace("#", "&num;", $match[2]) . "[/url]");
2634                         }, $item["body"]);
2635
2636                 $item["body"] = preg_replace_callback("/\[bookmark\=([$URLSearchString]*)\](.*?)\[\/bookmark\]/ism",
2637                         function ($match) {
2638                                 return ("[bookmark=" . str_replace("#", "&num;", $match[1]) . "]" . str_replace("#", "&num;", $match[2]) . "[/bookmark]");
2639                         }, $item["body"]);
2640
2641                 $item["body"] = preg_replace_callback("/\[attachment (.*)\](.*?)\[\/attachment\]/ism",
2642                         function ($match) {
2643                                 return ("[attachment " . str_replace("#", "&num;", $match[1]) . "]" . $match[2] . "[/attachment]");
2644                         }, $item["body"]);
2645
2646                 // Repair recursive urls
2647                 $item["body"] = preg_replace("/&num;\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",
2648                                 "&num;$2", $item["body"]);
2649
2650                 foreach ($tags as $tag) {
2651                         if ((strpos($tag, '#') !== 0) || strpos($tag, '[url=') || strlen($tag) < 2 || $tag[1] == '#') {
2652                                 continue;
2653                         }
2654
2655                         $basetag = str_replace('_',' ',substr($tag,1));
2656                         $newtag = '#[url=' . DI::baseUrl() . '/search?tag=' . $basetag . ']' . $basetag . '[/url]';
2657
2658                         $item["body"] = str_replace($tag, $newtag, $item["body"]);
2659
2660                         if (!stristr($item["tag"], "/search?tag=" . $basetag . "]" . $basetag . "[/url]")) {
2661                                 if (strlen($item["tag"])) {
2662                                         $item["tag"] = ',' . $item["tag"];
2663                                 }
2664                                 $item["tag"] = $newtag . $item["tag"];
2665                         }
2666                 }
2667
2668                 // Convert back the masked hashtags
2669                 $item["body"] = str_replace("&num;", "#", $item["body"]);
2670
2671                 // Remember! What happens in [code], stays in [code]
2672                 // roleback the # and [
2673                 $item["body"] = preg_replace_callback("/\[code(.*?)\](.*?)\[\/code\]/ism",
2674                         function ($match) {
2675                                 // we truly unESCape all sharp and leftsquarebracket
2676                                 $find = [chr(27).'sharp', chr(27).'leftsquarebracket'];
2677                                 $replace = ['#', '['];
2678                                 return ("[code" . $match[1] . "]" . str_replace($find, $replace, $match[2]) . "[/code]");
2679                         }, $item["body"]);
2680         }
2681
2682         /**
2683          * look for mention tags and setup a second delivery chain for forum/community posts if appropriate
2684          *
2685          * @param int $uid
2686          * @param int $item_id
2687          * @return boolean true if item was deleted, else false
2688          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
2689          * @throws \ImagickException
2690          */
2691         private static function tagDeliver($uid, $item_id)
2692         {
2693                 $mention = false;
2694
2695                 $user = DBA::selectFirst('user', [], ['uid' => $uid]);
2696                 if (!DBA::isResult($user)) {
2697                         return false;
2698                 }
2699
2700                 $community_page = (($user['page-flags'] == User::PAGE_FLAGS_COMMUNITY) ? true : false);
2701                 $prvgroup = (($user['page-flags'] == User::PAGE_FLAGS_PRVGROUP) ? true : false);
2702
2703                 $item = self::selectFirst(self::ITEM_FIELDLIST, ['id' => $item_id]);
2704                 if (!DBA::isResult($item)) {
2705                         return false;
2706                 }
2707
2708                 $link = Strings::normaliseLink(DI::baseUrl() . '/profile/' . $user['nickname']);
2709
2710                 /*
2711                  * Diaspora uses their own hardwired link URL in @-tags
2712                  * instead of the one we supply with webfinger
2713                  */
2714                 $dlink = Strings::normaliseLink(DI::baseUrl() . '/u/' . $user['nickname']);
2715
2716                 $cnt = preg_match_all('/[\@\!]\[url\=(.*?)\](.*?)\[\/url\]/ism', $item['body'], $matches, PREG_SET_ORDER);
2717                 if ($cnt) {
2718                         foreach ($matches as $mtch) {
2719                                 if (Strings::compareLink($link, $mtch[1]) || Strings::compareLink($dlink, $mtch[1])) {
2720                                         $mention = true;
2721                                         Logger::log('mention found: ' . $mtch[2]);
2722                                 }
2723                         }
2724                 }
2725
2726                 if (!$mention) {
2727                         if (($community_page || $prvgroup) &&
2728                                   !$item['wall'] && !$item['origin'] && ($item['id'] == $item['parent'])) {
2729                                 Logger::info('Delete private group/communiy top-level item without mention', ['id' => $item_id, 'guid'=> $item['guid']]);
2730                                 DBA::delete('item', ['id' => $item_id]);
2731                                 return true;
2732                         }
2733                         return false;
2734                 }
2735
2736                 $arr = ['item' => $item, 'user' => $user];
2737
2738                 Hook::callAll('tagged', $arr);
2739
2740                 if (!$community_page && !$prvgroup) {
2741                         return false;
2742                 }
2743
2744                 /*
2745                  * tgroup delivery - setup a second delivery chain
2746                  * prevent delivery looping - only proceed
2747                  * if the message originated elsewhere and is a top-level post
2748                  */
2749                 if ($item['wall'] || $item['origin'] || ($item['id'] != $item['parent'])) {
2750                         return false;
2751                 }
2752
2753                 // now change this copy of the post to a forum head message and deliver to all the tgroup members
2754                 $self = DBA::selectFirst('contact', ['id', 'name', 'url', 'thumb'], ['uid' => $uid, 'self' => true]);
2755                 if (!DBA::isResult($self)) {
2756                         return false;
2757                 }
2758
2759                 $owner_id = Contact::getIdForURL($self['url']);
2760
2761                 // also reset all the privacy bits to the forum default permissions
2762
2763                 $private = ($user['allow_cid'] || $user['allow_gid'] || $user['deny_cid'] || $user['deny_gid']) ? self::PRIVATE : self::PUBLIC;
2764
2765                 $psid = PermissionSet::getIdFromACL(
2766                         $user['uid'],
2767                         $user['allow_cid'],
2768                         $user['allow_gid'],
2769                         $user['deny_cid'],
2770                         $user['deny_gid']
2771                 );
2772
2773                 $forum_mode = ($prvgroup ? 2 : 1);
2774
2775                 $fields = ['wall' => true, 'origin' => true, 'forum_mode' => $forum_mode, 'contact-id' => $self['id'],
2776                         'owner-id' => $owner_id, 'private' => $private, 'psid' => $psid];
2777                 self::update($fields, ['id' => $item_id]);
2778
2779                 self::updateThread($item_id);
2780
2781                 Worker::add(['priority' => PRIORITY_HIGH, 'dont_fork' => true], 'Notifier', Delivery::POST, $item_id);
2782
2783                 return false;
2784         }
2785
2786         public static function isRemoteSelf($contact, &$datarray)
2787         {
2788                 if (!$contact['remote_self']) {
2789                         return false;
2790                 }
2791
2792                 // Prevent the forwarding of posts that are forwarded
2793                 if (!empty($datarray["extid"]) && ($datarray["extid"] == Protocol::DFRN)) {
2794                         Logger::log('Already forwarded', Logger::DEBUG);
2795                         return false;
2796                 }
2797
2798                 // Prevent to forward already forwarded posts
2799                 if ($datarray["app"] == DI::baseUrl()->getHostname()) {
2800                         Logger::log('Already forwarded (second test)', Logger::DEBUG);
2801                         return false;
2802                 }
2803
2804                 // Only forward posts
2805                 if ($datarray["verb"] != Activity::POST) {
2806                         Logger::log('No post', Logger::DEBUG);
2807                         return false;
2808                 }
2809
2810                 if (($contact['network'] != Protocol::FEED) && ($datarray['private'] == self::PRIVATE)) {
2811                         Logger::log('Not public', Logger::DEBUG);
2812                         return false;
2813                 }
2814
2815                 $datarray2 = $datarray;
2816                 Logger::log('remote-self start - Contact '.$contact['url'].' - '.$contact['remote_self'].' Item '.print_r($datarray, true), Logger::DEBUG);
2817                 if ($contact['remote_self'] == 2) {
2818                         $self = DBA::selectFirst('contact', ['id', 'name', 'url', 'thumb'],
2819                                         ['uid' => $contact['uid'], 'self' => true]);
2820                         if (DBA::isResult($self)) {
2821                                 $datarray['contact-id'] = $self["id"];
2822
2823                                 $datarray['owner-name'] = $self["name"];
2824                                 $datarray['owner-link'] = $self["url"];
2825                                 $datarray['owner-avatar'] = $self["thumb"];
2826
2827                                 $datarray['author-name']   = $datarray['owner-name'];
2828                                 $datarray['author-link']   = $datarray['owner-link'];
2829                                 $datarray['author-avatar'] = $datarray['owner-avatar'];
2830
2831                                 unset($datarray['edited']);
2832
2833                                 unset($datarray['network']);
2834                                 unset($datarray['owner-id']);
2835                                 unset($datarray['author-id']);
2836                         }
2837
2838                         if ($contact['network'] != Protocol::FEED) {
2839                                 $datarray["guid"] = System::createUUID();
2840                                 unset($datarray["plink"]);
2841                                 $datarray["uri"] = self::newURI($contact['uid'], $datarray["guid"]);
2842                                 $datarray["parent-uri"] = $datarray["uri"];
2843                                 $datarray["thr-parent"] = $datarray["uri"];
2844                                 $datarray["extid"] = Protocol::DFRN;
2845                                 $urlpart = parse_url($datarray2['author-link']);
2846                                 $datarray["app"] = $urlpart["host"];
2847                         } else {
2848                                 $datarray['private'] = self::PUBLIC;
2849                         }
2850                 }
2851
2852                 if ($contact['network'] != Protocol::FEED) {
2853                         // Store the original post
2854                         $result = self::insert($datarray2, false, false);
2855                         Logger::log('remote-self post original item - Contact '.$contact['url'].' return '.$result.' Item '.print_r($datarray2, true), Logger::DEBUG);
2856                 } else {
2857                         $datarray["app"] = "Feed";
2858                         $result = true;
2859                 }
2860
2861                 // Trigger automatic reactions for addons
2862                 $datarray['api_source'] = true;
2863
2864                 // We have to tell the hooks who we are - this really should be improved
2865                 $_SESSION["authenticated"] = true;
2866                 $_SESSION["uid"] = $contact['uid'];
2867
2868                 return $result;
2869         }
2870
2871         /**
2872          *
2873          * @param string $s
2874          * @param int    $uid
2875          * @param array  $item
2876          * @param int    $cid
2877          * @return string
2878          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
2879          * @throws \ImagickException
2880          */
2881         public static function fixPrivatePhotos($s, $uid, $item = null, $cid = 0)
2882         {
2883                 if (DI::config()->get('system', 'disable_embedded')) {
2884                         return $s;
2885                 }
2886
2887                 Logger::log('check for photos', Logger::DEBUG);
2888                 $site = substr(DI::baseUrl(), strpos(DI::baseUrl(), '://'));
2889
2890                 $orig_body = $s;
2891                 $new_body = '';
2892
2893                 $img_start = strpos($orig_body, '[img');
2894                 $img_st_close = ($img_start !== false ? strpos(substr($orig_body, $img_start), ']') : false);
2895                 $img_len = ($img_start !== false ? strpos(substr($orig_body, $img_start + $img_st_close + 1), '[/img]') : false);
2896
2897                 while (($img_st_close !== false) && ($img_len !== false)) {
2898                         $img_st_close++; // make it point to AFTER the closing bracket
2899                         $image = substr($orig_body, $img_start + $img_st_close, $img_len);
2900
2901                         Logger::log('found photo ' . $image, Logger::DEBUG);
2902
2903                         if (stristr($image, $site . '/photo/')) {
2904                                 // Only embed locally hosted photos
2905                                 $replace = false;
2906                                 $i = basename($image);
2907                                 $i = str_replace(['.jpg', '.png', '.gif'], ['', '', ''], $i);
2908                                 $x = strpos($i, '-');
2909
2910                                 if ($x) {
2911                                         $res = substr($i, $x + 1);
2912                                         $i = substr($i, 0, $x);
2913                                         $photo = Photo::getPhotoForUser($uid, $i, $res);
2914                                         if (DBA::isResult($photo)) {
2915                                                 /*
2916                                                  * Check to see if we should replace this photo link with an embedded image
2917                                                  * 1. No need to do so if the photo is public
2918                                                  * 2. If there's a contact-id provided, see if they're in the access list
2919                                                  *    for the photo. If so, embed it.
2920                                                  * 3. Otherwise, if we have an item, see if the item permissions match the photo
2921                                                  *    permissions, regardless of order but first check to see if they're an exact
2922                                                  *    match to save some processing overhead.
2923                                                  */
2924                                                 if (self::hasPermissions($photo)) {
2925                                                         if ($cid) {
2926                                                                 $recips = self::enumeratePermissions($photo);
2927                                                                 if (in_array($cid, $recips)) {
2928                                                                         $replace = true;
2929                                                                 }
2930                                                         } elseif ($item) {
2931                                                                 if (self::samePermissions($uid, $item, $photo)) {
2932                                                                         $replace = true;
2933                                                                 }
2934                                                         }
2935                                                 }
2936                                                 if ($replace) {
2937                                                         $photo_img = Photo::getImageForPhoto($photo);
2938                                                         // If a custom width and height were specified, apply before embedding
2939                                                         if (preg_match("/\[img\=([0-9]*)x([0-9]*)\]/is", substr($orig_body, $img_start, $img_st_close), $match)) {
2940                                                                 Logger::log('scaling photo', Logger::DEBUG);
2941
2942                                                                 $width = intval($match[1]);
2943                                                                 $height = intval($match[2]);
2944
2945                                                                 $photo_img->scaleDown(max($width, $height));
2946                                                         }
2947
2948                                                         $data = $photo_img->asString();
2949                                                         $type = $photo_img->getType();
2950
2951                                                         Logger::log('replacing photo', Logger::DEBUG);
2952                                                         $image = 'data:' . $type . ';base64,' . base64_encode($data);
2953                                                         Logger::log('replaced: ' . $image, Logger::DATA);
2954                                                 }
2955                                         }
2956                                 }
2957                         }
2958
2959                         $new_body = $new_body . substr($orig_body, 0, $img_start + $img_st_close) . $image . '[/img]';
2960                         $orig_body = substr($orig_body, $img_start + $img_st_close + $img_len + strlen('[/img]'));
2961                         if ($orig_body === false) {
2962                                 $orig_body = '';
2963                         }
2964
2965                         $img_start = strpos($orig_body, '[img');
2966                         $img_st_close = ($img_start !== false ? strpos(substr($orig_body, $img_start), ']') : false);
2967                         $img_len = ($img_start !== false ? strpos(substr($orig_body, $img_start + $img_st_close + 1), '[/img]') : false);
2968                 }
2969
2970                 $new_body = $new_body . $orig_body;
2971
2972                 return $new_body;
2973         }
2974
2975         private static function hasPermissions($obj)
2976         {
2977                 return !empty($obj['allow_cid']) || !empty($obj['allow_gid']) ||
2978                         !empty($obj['deny_cid']) || !empty($obj['deny_gid']);
2979         }
2980
2981         private static function samePermissions($uid, $obj1, $obj2)
2982         {
2983                 // first part is easy. Check that these are exactly the same.
2984                 if (($obj1['allow_cid'] == $obj2['allow_cid'])
2985                         && ($obj1['allow_gid'] == $obj2['allow_gid'])
2986                         && ($obj1['deny_cid'] == $obj2['deny_cid'])
2987                         && ($obj1['deny_gid'] == $obj2['deny_gid'])) {
2988                         return true;
2989                 }
2990
2991                 // This is harder. Parse all the permissions and compare the resulting set.
2992                 $recipients1 = self::enumeratePermissions($obj1);
2993                 $recipients2 = self::enumeratePermissions($obj2);
2994                 sort($recipients1);
2995                 sort($recipients2);
2996
2997                 /// @TODO Comparison of arrays, maybe use array_diff_assoc() here?
2998                 return ($recipients1 == $recipients2);
2999         }
3000
3001         /**
3002          * Returns an array of contact-ids that are allowed to see this object
3003          *
3004          * @param array $obj        Item array with at least uid, allow_cid, allow_gid, deny_cid and deny_gid
3005          * @param bool  $check_dead Prunes unavailable contacts from the result
3006          * @return array
3007          * @throws \Exception
3008          */
3009         public static function enumeratePermissions(array $obj, bool $check_dead = false)
3010         {
3011                 $aclFormater = DI::aclFormatter();
3012
3013                 $allow_people = $aclFormater->expand($obj['allow_cid']);
3014                 $allow_groups = Group::expand($obj['uid'], $aclFormater->expand($obj['allow_gid']), $check_dead);
3015                 $deny_people  = $aclFormater->expand($obj['deny_cid']);
3016                 $deny_groups  = Group::expand($obj['uid'], $aclFormater->expand($obj['deny_gid']), $check_dead);
3017                 $recipients   = array_unique(array_merge($allow_people, $allow_groups));
3018                 $deny         = array_unique(array_merge($deny_people, $deny_groups));
3019                 $recipients   = array_diff($recipients, $deny);
3020                 return $recipients;
3021         }
3022
3023         public static function getFeedTags($item)
3024         {
3025                 $ret = [];
3026                 $matches = false;
3027                 $cnt = preg_match_all('|\#\[url\=(.*?)\](.*?)\[\/url\]|', $item['tag'], $matches);
3028                 if ($cnt) {
3029                         for ($x = 0; $x < $cnt; $x ++) {
3030                                 if ($matches[1][$x]) {
3031                                         $ret[$matches[2][$x]] = ['#', $matches[1][$x], $matches[2][$x]];
3032                                 }
3033                         }
3034                 }
3035                 $matches = false;
3036                 $cnt = preg_match_all('|\@\[url\=(.*?)\](.*?)\[\/url\]|', $item['tag'], $matches);
3037                 if ($cnt) {
3038                         for ($x = 0; $x < $cnt; $x ++) {
3039                                 if ($matches[1][$x]) {
3040                                         $ret[] = ['@', $matches[1][$x], $matches[2][$x]];
3041                                 }
3042                         }
3043                 }
3044                 return $ret;
3045         }
3046
3047         public static function expire($uid, $days, $network = "", $force = false)
3048         {
3049                 if (!$uid || ($days < 1)) {
3050                         return;
3051                 }
3052
3053                 $condition = ["`uid` = ? AND NOT `deleted` AND `id` = `parent` AND `gravity` = ?",
3054                         $uid, GRAVITY_PARENT];
3055
3056                 /*
3057                  * $expire_network_only = save your own wall posts
3058                  * and just expire conversations started by others
3059                  */
3060                 $expire_network_only = DI::pConfig()->get($uid, 'expire', 'network_only', false);
3061
3062                 if ($expire_network_only) {
3063                         $condition[0] .= " AND NOT `wall`";
3064                 }
3065
3066                 if ($network != "") {
3067                         $condition[0] .= " AND `network` = ?";
3068                         $condition[] = $network;
3069                 }
3070
3071                 $condition[0] .= " AND `received` < UTC_TIMESTAMP() - INTERVAL ? DAY";
3072                 $condition[] = $days;
3073
3074                 $items = self::select(['file', 'resource-id', 'starred', 'type', 'id', 'post-type'], $condition);
3075
3076                 if (!DBA::isResult($items)) {
3077                         return;
3078                 }
3079
3080                 $expire_items = DI::pConfig()->get($uid, 'expire', 'items', true);
3081
3082                 // Forcing expiring of items - but not notes and marked items
3083                 if ($force) {
3084                         $expire_items = true;
3085                 }
3086
3087                 $expire_notes = DI::pConfig()->get($uid, 'expire', 'notes', true);
3088                 $expire_starred = DI::pConfig()->get($uid, 'expire', 'starred', true);
3089                 $expire_photos = DI::pConfig()->get($uid, 'expire', 'photos', false);
3090
3091                 $expired = 0;
3092
3093                 while ($item = Item::fetch($items)) {
3094                         // don't expire filed items
3095
3096                         if (strpos($item['file'], '[') !== false) {
3097                                 continue;
3098                         }
3099
3100                         // Only expire posts, not photos and photo comments
3101
3102                         if (!$expire_photos && strlen($item['resource-id'])) {
3103                                 continue;
3104                         } elseif (!$expire_starred && intval($item['starred'])) {
3105                                 continue;
3106                         } elseif (!$expire_notes && (($item['type'] == 'note') || ($item['post-type'] == Item::PT_PERSONAL_NOTE))) {
3107                                 continue;
3108                         } elseif (!$expire_items && ($item['type'] != 'note') && ($item['post-type'] != Item::PT_PERSONAL_NOTE)) {
3109                                 continue;
3110                         }
3111
3112                         self::markForDeletionById($item['id'], PRIORITY_LOW);
3113
3114                         ++$expired;
3115                 }
3116                 DBA::close($items);
3117                 Logger::log('User ' . $uid . ": expired $expired items; expire items: $expire_items, expire notes: $expire_notes, expire starred: $expire_starred, expire photos: $expire_photos");
3118         }
3119
3120         public static function firstPostDate($uid, $wall = false)
3121         {
3122                 $condition = ['uid' => $uid, 'wall' => $wall, 'deleted' => false, 'visible' => true, 'moderated' => false];
3123                 $params = ['order' => ['received' => false]];
3124                 $thread = DBA::selectFirst('thread', ['received'], $condition, $params);
3125                 if (DBA::isResult($thread)) {
3126                         return substr(DateTimeFormat::local($thread['received']), 0, 10);
3127                 }
3128                 return false;
3129         }
3130
3131         /**
3132          * add/remove activity to an item
3133          *
3134          * Toggle activities as like,dislike,attend of an item
3135          *
3136          * @param string $item_id
3137          * @param string $verb
3138          *            Activity verb. One of
3139          *            like, unlike, dislike, undislike, attendyes, unattendyes,
3140          *            attendno, unattendno, attendmaybe, unattendmaybe
3141          * @return bool
3142          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
3143          * @throws \ImagickException
3144          * @hook  'post_local_end'
3145          *            array $arr
3146          *            'post_id' => ID of posted item
3147          */
3148         public static function performActivity($item_id, $verb)
3149         {
3150                 if (!Session::isAuthenticated()) {
3151                         return false;
3152                 }
3153
3154                 switch ($verb) {
3155                         case 'like':
3156                         case 'unlike':
3157                                 $activity = Activity::LIKE;
3158                                 break;
3159                         case 'dislike':
3160                         case 'undislike':
3161                                 $activity = Activity::DISLIKE;
3162                                 break;
3163                         case 'attendyes':
3164                         case 'unattendyes':
3165                                 $activity = Activity::ATTEND;
3166                                 break;
3167                         case 'attendno':
3168                         case 'unattendno':
3169                                 $activity = Activity::ATTENDNO;
3170                                 break;
3171                         case 'attendmaybe':
3172                         case 'unattendmaybe':
3173                                 $activity = Activity::ATTENDMAYBE;
3174                                 break;
3175                         case 'follow':
3176                         case 'unfollow':
3177                                 $activity = Activity::FOLLOW;
3178                                 break;
3179                         default:
3180                                 Logger::log('like: unknown verb ' . $verb . ' for item ' . $item_id);
3181                                 return false;
3182                 }
3183
3184                 // Enable activity toggling instead of on/off
3185                 $event_verb_flag = $activity === Activity::ATTEND || $activity === Activity::ATTENDNO || $activity === Activity::ATTENDMAYBE;
3186
3187                 Logger::log('like: verb ' . $verb . ' item ' . $item_id);
3188
3189                 $item = self::selectFirst(self::ITEM_FIELDLIST, ['`id` = ? OR `uri` = ?', $item_id, $item_id]);
3190                 if (!DBA::isResult($item)) {
3191                         Logger::log('like: unknown item ' . $item_id);
3192                         return false;
3193                 }
3194
3195                 $item_uri = $item['uri'];
3196
3197                 $uid = $item['uid'];
3198                 if (($uid == 0) && local_user()) {
3199                         $uid = local_user();
3200                 }
3201
3202                 if (!Security::canWriteToUserWall($uid)) {
3203                         Logger::log('like: unable to write on wall ' . $uid);
3204                         return false;
3205                 }
3206
3207                 // Retrieves the local post owner
3208                 $owner_self_contact = DBA::selectFirst('contact', [], ['uid' => $uid, 'self' => true]);
3209                 if (!DBA::isResult($owner_self_contact)) {
3210                         Logger::log('like: unknown owner ' . $uid);
3211                         return false;
3212                 }
3213
3214                 // Retrieve the current logged in user's public contact
3215                 $author_id = public_contact();
3216
3217                 $author_contact = DBA::selectFirst('contact', ['url'], ['id' => $author_id]);
3218                 if (!DBA::isResult($author_contact)) {
3219                         Logger::log('like: unknown author ' . $author_id);
3220                         return false;
3221                 }
3222
3223                 // Contact-id is the uid-dependant author contact
3224                 if (local_user() == $uid) {
3225                         $item_contact_id = $owner_self_contact['id'];
3226                 } else {
3227                         $item_contact_id = Contact::getIdForURL($author_contact['url'], $uid, true);
3228                         $item_contact = DBA::selectFirst('contact', [], ['id' => $item_contact_id]);
3229                         if (!DBA::isResult($item_contact)) {
3230                                 Logger::log('like: unknown item contact ' . $item_contact_id);
3231                                 return false;
3232                         }
3233                 }
3234
3235                 // Look for an existing verb row
3236                 // event participation are essentially radio toggles. If you make a subsequent choice,
3237                 // we need to eradicate your first choice.
3238                 if ($event_verb_flag) {
3239                         $verbs = [Activity::ATTEND, Activity::ATTENDNO, Activity::ATTENDMAYBE];
3240
3241                         // Translate to the index based activity index
3242                         $activities = [];
3243                         foreach ($verbs as $verb) {
3244                                 $activities[] = self::activityToIndex($verb);
3245                         }
3246                 } else {
3247                         $activities = self::activityToIndex($activity);
3248                 }
3249
3250                 $condition = ['activity' => $activities, 'deleted' => false, 'gravity' => GRAVITY_ACTIVITY,
3251                         'author-id' => $author_id, 'uid' => $item['uid'], 'thr-parent' => $item_uri];
3252
3253                 $like_item = self::selectFirst(['id', 'guid', 'verb'], $condition);
3254
3255                 // If it exists, mark it as deleted
3256                 if (DBA::isResult($like_item)) {
3257                         self::markForDeletionById($like_item['id']);
3258
3259                         if (!$event_verb_flag || $like_item['verb'] == $activity) {
3260                                 return true;
3261                         }
3262                 }
3263
3264                 // Verb is "un-something", just trying to delete existing entries
3265                 if (strpos($verb, 'un') === 0) {
3266                         return true;
3267                 }
3268
3269                 $objtype = $item['resource-id'] ? Activity\ObjectType::IMAGE : Activity\ObjectType::NOTE;
3270
3271                 $new_item = [
3272                         'guid'          => System::createUUID(),
3273                         'uri'           => self::newURI($item['uid']),
3274                         'uid'           => $item['uid'],
3275                         'contact-id'    => $item_contact_id,
3276                         'wall'          => $item['wall'],
3277                         'origin'        => 1,
3278                         'network'       => Protocol::DFRN,
3279                         'gravity'       => GRAVITY_ACTIVITY,
3280                         'parent'        => $item['id'],
3281                         'parent-uri'    => $item['uri'],
3282                         'thr-parent'    => $item['uri'],
3283                         'owner-id'      => $author_id,
3284                         'author-id'     => $author_id,
3285                         'body'          => $activity,
3286                         'verb'          => $activity,
3287                         'object-type'   => $objtype,
3288                         'allow_cid'     => $item['allow_cid'],
3289                         'allow_gid'     => $item['allow_gid'],
3290                         'deny_cid'      => $item['deny_cid'],
3291                         'deny_gid'      => $item['deny_gid'],
3292                         'visible'       => 1,
3293                         'unseen'        => 1,
3294                 ];
3295
3296                 $signed = Diaspora::createLikeSignature($uid, $new_item);
3297                 if (!empty($signed)) {
3298                         $new_item['diaspora_signed_text'] = json_encode($signed);
3299                 }
3300
3301                 $new_item_id = self::insert($new_item);
3302
3303                 // If the parent item isn't visible then set it to visible
3304                 if (!$item['visible']) {
3305                         self::update(['visible' => true], ['id' => $item['id']]);
3306                 }
3307
3308                 $new_item['id'] = $new_item_id;
3309
3310                 Hook::callAll('post_local_end', $new_item);
3311
3312                 return true;
3313         }
3314
3315         private static function addThread($itemid, $onlyshadow = false)
3316         {
3317                 $fields = ['uid', 'created', 'edited', 'commented', 'received', 'changed', 'wall', 'private', 'pubmail',
3318                         'moderated', 'visible', 'starred', 'contact-id', 'post-type',
3319                         'deleted', 'origin', 'forum_mode', 'mention', 'network', 'author-id', 'owner-id'];
3320                 $condition = ["`id` = ? AND (`parent` = ? OR `parent` = 0)", $itemid, $itemid];
3321                 $item = self::selectFirst($fields, $condition);
3322
3323                 if (!DBA::isResult($item)) {
3324                         return;
3325                 }
3326
3327                 $item['iid'] = $itemid;
3328
3329                 if (!$onlyshadow) {
3330                         $result = DBA::insert('thread', $item);
3331
3332                         Logger::log("Add thread for item ".$itemid." - ".print_r($result, true), Logger::DEBUG);
3333                 }
3334         }
3335
3336         private static function updateThread($itemid, $setmention = false)
3337         {
3338                 $fields = ['uid', 'guid', 'created', 'edited', 'commented', 'received', 'changed', 'post-type',
3339                         'wall', 'private', 'pubmail', 'moderated', 'visible', 'starred', 'contact-id',
3340                         'deleted', 'origin', 'forum_mode', 'network', 'author-id', 'owner-id'];
3341                 $condition = ["`id` = ? AND (`parent` = ? OR `parent` = 0)", $itemid, $itemid];
3342
3343                 $item = self::selectFirst($fields, $condition);
3344                 if (!DBA::isResult($item)) {
3345                         return;
3346                 }
3347
3348                 if ($setmention) {
3349                         $item["mention"] = 1;
3350                 }
3351
3352                 $fields = [];
3353
3354                 foreach ($item as $field => $data) {
3355                         if (!in_array($field, ["guid"])) {
3356                                 $fields[$field] = $data;
3357                         }
3358                 }
3359
3360                 $result = DBA::update('thread', $fields, ['iid' => $itemid]);
3361
3362                 Logger::log("Update thread for item ".$itemid." - guid ".$item["guid"]." - ".(int)$result, Logger::DEBUG);
3363         }
3364
3365         private static function deleteThread($itemid, $itemuri = "")
3366         {
3367                 $item = DBA::selectFirst('thread', ['uid'], ['iid' => $itemid]);
3368                 if (!DBA::isResult($item)) {
3369                         Logger::log('No thread found for id '.$itemid, Logger::DEBUG);
3370                         return;
3371                 }
3372
3373                 $result = DBA::delete('thread', ['iid' => $itemid], ['cascade' => false]);
3374
3375                 Logger::log("deleteThread: Deleted thread for item ".$itemid." - ".print_r($result, true), Logger::DEBUG);
3376
3377                 if ($itemuri != "") {
3378                         $condition = ["`uri` = ? AND NOT `deleted` AND NOT (`uid` IN (?, 0))", $itemuri, $item["uid"]];
3379                         if (!self::exists($condition)) {
3380                                 DBA::delete('item', ['uri' => $itemuri, 'uid' => 0]);
3381                                 Logger::debug('Deleted shadow item', ['id' => $itemid, 'uri' => $itemuri]);
3382                         }
3383                 }
3384         }
3385
3386         public static function getPermissionsSQLByUserId($owner_id)
3387         {
3388                 $local_user = local_user();
3389                 $remote_user = Session::getRemoteContactID($owner_id);
3390
3391                 /*
3392                  * Construct permissions
3393                  *
3394                  * default permissions - anonymous user
3395                  */
3396                 $sql = sprintf(" AND `item`.`private` != %d", self::PRIVATE);
3397
3398                 // Profile owner - everything is visible
3399                 if ($local_user && ($local_user == $owner_id)) {
3400                         $sql = '';
3401                 } elseif ($remote_user) {
3402                         /*
3403                          * Authenticated visitor. Unless pre-verified,
3404                          * check that the contact belongs to this $owner_id
3405                          * and load the groups the visitor belongs to.
3406                          * If pre-verified, the caller is expected to have already
3407                          * done this and passed the groups into this function.
3408                          */
3409                         $set = PermissionSet::get($owner_id, $remote_user);
3410
3411                         if (!empty($set)) {
3412                                 $sql_set = sprintf(" OR (`item`.`private` = %d AND `item`.`wall` AND `item`.`psid` IN (", self::PRIVATE) . implode(',', $set) . "))";
3413                         } else {
3414                                 $sql_set = '';
3415                         }
3416
3417                         $sql = sprintf(" AND (`item`.`private` != %d", self::PRIVATE) . $sql_set . ")";
3418                 }
3419
3420                 return $sql;
3421         }
3422
3423         /**
3424          * get translated item type
3425          *
3426          * @param $item
3427          * @return string
3428          */
3429         public static function postType($item)
3430         {
3431                 if (!empty($item['event-id'])) {
3432                         return DI::l10n()->t('event');
3433                 } elseif (!empty($item['resource-id'])) {
3434                         return DI::l10n()->t('photo');
3435                 } elseif (!empty($item['verb']) && $item['verb'] !== Activity::POST) {
3436                         return DI::l10n()->t('activity');
3437                 } elseif ($item['id'] != $item['parent']) {
3438                         return DI::l10n()->t('comment');
3439                 }
3440
3441                 return DI::l10n()->t('post');
3442         }
3443
3444         /**
3445          * Sets the "rendered-html" field of the provided item
3446          *
3447          * Body is preserved to avoid side-effects as we modify it just-in-time for spoilers and private image links
3448          *
3449          * @param array $item
3450          * @param bool  $update
3451          *
3452          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
3453          * @todo Remove reference, simply return "rendered-html" and "rendered-hash"
3454          */
3455         public static function putInCache(&$item, $update = false)
3456         {
3457                 $body = $item["body"];
3458
3459                 $rendered_hash = $item['rendered-hash'] ?? '';
3460                 $rendered_html = $item['rendered-html'] ?? '';
3461
3462                 if ($rendered_hash == ''
3463                         || $rendered_html == ""
3464                         || $rendered_hash != hash("md5", $item["body"])
3465                         || DI::config()->get("system", "ignore_cache")
3466                 ) {
3467                         self::addRedirToImageTags($item);
3468
3469                         $item["rendered-html"] = BBCode::convert($item["body"]);
3470                         $item["rendered-hash"] = hash("md5", $item["body"]);
3471
3472                         $hook_data = ['item' => $item, 'rendered-html' => $item['rendered-html'], 'rendered-hash' => $item['rendered-hash']];
3473                         Hook::callAll('put_item_in_cache', $hook_data);
3474                         $item['rendered-html'] = $hook_data['rendered-html'];
3475                         $item['rendered-hash'] = $hook_data['rendered-hash'];
3476                         unset($hook_data);
3477
3478                         // Force an update if the generated values differ from the existing ones
3479                         if ($rendered_hash != $item["rendered-hash"]) {
3480                                 $update = true;
3481                         }
3482
3483                         // Only compare the HTML when we forcefully ignore the cache
3484                         if (DI::config()->get("system", "ignore_cache") && ($rendered_html != $item["rendered-html"])) {
3485                                 $update = true;
3486                         }
3487
3488                         if ($update && !empty($item["id"])) {
3489                                 self::update(
3490                                         [
3491                                                 'rendered-html' => $item["rendered-html"],
3492                                                 'rendered-hash' => $item["rendered-hash"]
3493                                         ],
3494                                         ['id' => $item["id"]]
3495                                 );
3496                         }
3497                 }
3498
3499                 $item["body"] = $body;
3500         }
3501
3502         /**
3503          * Find any non-embedded images in private items and add redir links to them
3504          *
3505          * @param array &$item The field array of an item row
3506          */
3507         private static function addRedirToImageTags(array &$item)
3508         {
3509                 $app = DI::app();
3510
3511                 $matches = [];
3512                 $cnt = preg_match_all('|\[img\](http[^\[]*?/photo/[a-fA-F0-9]+?(-[0-9]\.[\w]+?)?)\[\/img\]|', $item['body'], $matches, PREG_SET_ORDER);
3513                 if ($cnt) {
3514                         foreach ($matches as $mtch) {
3515                                 if (strpos($mtch[1], '/redir') !== false) {
3516                                         continue;
3517                                 }
3518
3519                                 if ((local_user() == $item['uid']) && ($item['private'] == self::PRIVATE) && ($item['contact-id'] != $app->contact['id']) && ($item['network'] == Protocol::DFRN)) {
3520                                         $img_url = 'redir/' . $item['contact-id'] . '?url=' . urlencode($mtch[1]);
3521                                         $item['body'] = str_replace($mtch[0], '[img]' . $img_url . '[/img]', $item['body']);
3522                                 }
3523                         }
3524                 }
3525         }
3526
3527         /**
3528          * Given an item array, convert the body element from bbcode to html and add smilie icons.
3529          * If attach is true, also add icons for item attachments.
3530          *
3531          * @param array   $item
3532          * @param boolean $attach
3533          * @param boolean $is_preview
3534          * @return string item body html
3535          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
3536          * @throws \ImagickException
3537          * @hook  prepare_body_init item array before any work
3538          * @hook  prepare_body_content_filter ('item'=>item array, 'filter_reasons'=>string array) before first bbcode to html
3539          * @hook  prepare_body ('item'=>item array, 'html'=>body string, 'is_preview'=>boolean, 'filter_reasons'=>string array) after first bbcode to html
3540          * @hook  prepare_body_final ('item'=>item array, 'html'=>body string) after attach icons and blockquote special case handling (spoiler, author)
3541          */
3542         public static function prepareBody(array &$item, $attach = false, $is_preview = false)
3543         {
3544                 $a = DI::app();
3545                 Hook::callAll('prepare_body_init', $item);
3546
3547                 // In order to provide theme developers more possibilities, event items
3548                 // are treated differently.
3549                 if ($item['object-type'] === Activity\ObjectType::EVENT && isset($item['event-id'])) {
3550                         $ev = Event::getItemHTML($item);
3551                         return $ev;
3552                 }
3553
3554                 $tags = Term::populateTagsFromItem($item);
3555
3556                 $item['tags'] = $tags['tags'];
3557                 $item['hashtags'] = $tags['hashtags'];
3558                 $item['mentions'] = $tags['mentions'];
3559
3560                 // Compile eventual content filter reasons
3561                 $filter_reasons = [];
3562                 if (!$is_preview && public_contact() != $item['author-id']) {
3563                         if (!empty($item['content-warning']) && (!local_user() || !DI::pConfig()->get(local_user(), 'system', 'disable_cw', false))) {
3564                                 $filter_reasons[] = DI::l10n()->t('Content warning: %s', $item['content-warning']);
3565                         }
3566
3567                         $hook_data = [
3568                                 'item' => $item,
3569                                 'filter_reasons' => $filter_reasons
3570                         ];
3571                         Hook::callAll('prepare_body_content_filter', $hook_data);
3572                         $filter_reasons = $hook_data['filter_reasons'];
3573                         unset($hook_data);
3574                 }
3575
3576                 // Update the cached values if there is no "zrl=..." on the links.
3577                 $update = (!Session::isAuthenticated() && ($item["uid"] == 0));
3578
3579                 // Or update it if the current viewer is the intented viewer.
3580                 if (($item["uid"] == local_user()) && ($item["uid"] != 0)) {
3581                         $update = true;
3582                 }
3583
3584                 self::putInCache($item, $update);
3585                 $s = $item["rendered-html"];
3586
3587                 $hook_data = [
3588                         'item' => $item,
3589                         'html' => $s,
3590                         'preview' => $is_preview,
3591                         'filter_reasons' => $filter_reasons
3592                 ];
3593                 Hook::callAll('prepare_body', $hook_data);
3594                 $s = $hook_data['html'];
3595                 unset($hook_data);
3596
3597                 if (!$attach) {
3598                         // Replace the blockquotes with quotes that are used in mails.
3599                         $mailquote = '<blockquote type="cite" class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">';
3600                         $s = str_replace(['<blockquote>', '<blockquote class="spoiler">', '<blockquote class="author">'], [$mailquote, $mailquote, $mailquote], $s);
3601                         return $s;
3602                 }
3603
3604                 $as = '';
3605                 $vhead = false;
3606                 $matches = [];
3607                 preg_match_all('|\[attach\]href=\"(.*?)\" length=\"(.*?)\" type=\"(.*?)\"(?: title=\"(.*?)\")?|', $item['attach'], $matches, PREG_SET_ORDER);
3608                 foreach ($matches as $mtch) {
3609                         $mime = $mtch[3];
3610
3611                         $the_url = Contact::magicLinkById($item['author-id'], $mtch[1]);
3612
3613                         if (strpos($mime, 'video') !== false) {
3614                                 if (!$vhead) {
3615                                         $vhead = true;
3616                                         DI::page()['htmlhead'] .= Renderer::replaceMacros(Renderer::getMarkupTemplate('videos_head.tpl'));
3617                                 }
3618
3619                                 $url_parts = explode('/', $the_url);
3620                                 $id = end($url_parts);
3621                                 $as .= Renderer::replaceMacros(Renderer::getMarkupTemplate('video_top.tpl'), [
3622                                         '$video' => [
3623                                                 'id'     => $id,
3624                                                 'title'  => DI::l10n()->t('View Video'),
3625                                                 'src'    => $the_url,
3626                                                 'mime'   => $mime,
3627                                         ],
3628                                 ]);
3629                         }
3630
3631                         $filetype = strtolower(substr($mime, 0, strpos($mime, '/')));
3632                         if ($filetype) {
3633                                 $filesubtype = strtolower(substr($mime, strpos($mime, '/') + 1));
3634                                 $filesubtype = str_replace('.', '-', $filesubtype);
3635                         } else {
3636                                 $filetype = 'unkn';
3637                                 $filesubtype = 'unkn';
3638                         }
3639
3640                         $title = Strings::escapeHtml(trim(($mtch[4] ?? '') ?: $mtch[1]));
3641                         $title .= ' ' . $mtch[2] . ' ' . DI::l10n()->t('bytes');
3642
3643                         $icon = '<div class="attachtype icon s22 type-' . $filetype . ' subtype-' . $filesubtype . '"></div>';
3644                         $as .= '<a href="' . strip_tags($the_url) . '" title="' . $title . '" class="attachlink" target="_blank" rel="noopener noreferrer" >' . $icon . '</a>';
3645                 }
3646
3647                 if ($as != '') {
3648                         $s .= '<div class="body-attach">'.$as.'<div class="clear"></div></div>';
3649                 }
3650
3651                 // Map.
3652                 if (strpos($s, '<div class="map">') !== false && !empty($item['coord'])) {
3653                         $x = Map::byCoordinates(trim($item['coord']));
3654                         if ($x) {
3655                                 $s = preg_replace('/\<div class\=\"map\"\>/', '$0' . $x, $s);
3656                         }
3657                 }
3658
3659                 // Replace friendica image url size with theme preference.
3660                 if (!empty($a->theme_info['item_image_size'])) {
3661                         $ps = $a->theme_info['item_image_size'];
3662                         $s = preg_replace('|(<img[^>]+src="[^"]+/photo/[0-9a-f]+)-[0-9]|', "$1-" . $ps, $s);
3663                 }
3664
3665                 $s = HTML::applyContentFilter($s, $filter_reasons);
3666
3667                 $hook_data = ['item' => $item, 'html' => $s];
3668                 Hook::callAll('prepare_body_final', $hook_data);
3669
3670                 return $hook_data['html'];
3671         }
3672
3673         /**
3674          * get private link for item
3675          *
3676          * @param array $item
3677          * @return boolean|array False if item has not plink, otherwise array('href'=>plink url, 'title'=>translated title)
3678          * @throws \Exception
3679          */
3680         public static function getPlink($item)
3681         {
3682                 $a = DI::app();
3683
3684                 if ($a->user['nickname'] != "") {
3685                         $ret = [
3686                                 'href' => "display/" . $item['guid'],
3687                                 'orig' => "display/" . $item['guid'],
3688                                 'title' => DI::l10n()->t('View on separate page'),
3689                                 'orig_title' => DI::l10n()->t('view on separate page'),
3690                         ];
3691
3692                         if (!empty($item['plink'])) {
3693                                 $ret["href"] = DI::baseUrl()->remove($item['plink']);
3694                                 $ret["title"] = DI::l10n()->t('link to source');
3695                         }
3696
3697                 } elseif (!empty($item['plink']) && ($item['private'] != self::PRIVATE)) {
3698                         $ret = [
3699                                 'href' => $item['plink'],
3700                                 'orig' => $item['plink'],
3701                                 'title' => DI::l10n()->t('link to source'),
3702                         ];
3703                 } else {
3704                         $ret = [];
3705                 }
3706
3707                 return $ret;
3708         }
3709
3710         /**
3711          * Is the given item array a post that is sent as starting post to a forum?
3712          *
3713          * @param array $item
3714          * @param array $owner
3715          *
3716          * @return boolean "true" when it is a forum post
3717          */
3718         public static function isForumPost(array $item, array $owner = [])
3719         {
3720                 if (empty($owner)) {
3721                         $owner = User::getOwnerDataById($item['uid']);
3722                         if (empty($owner)) {
3723                                 return false;
3724                         }
3725                 }
3726
3727                 if (($item['author-id'] == $item['owner-id']) ||
3728                         ($owner['id'] == $item['contact-id']) ||
3729                         ($item['uri'] != $item['parent-uri']) ||
3730                         $item['origin']) {
3731                         return false;
3732                 }
3733
3734                 return Contact::isForum($item['contact-id']);
3735         }
3736
3737         /**
3738          * Search item id for given URI or plink
3739          *
3740          * @param string $uri
3741          * @param integer $uid
3742          *
3743          * @return integer item id
3744          */
3745         public static function searchByLink($uri, $uid = 0)
3746         {
3747                 $ssl_uri = str_replace('http://', 'https://', $uri);
3748                 $uris = [$uri, $ssl_uri, Strings::normaliseLink($uri)];
3749
3750                 $item = DBA::selectFirst('item', ['id'], ['uri' => $uris, 'uid' => $uid]);
3751                 if (DBA::isResult($item)) {
3752                         return $item['id'];
3753                 }
3754
3755                 $itemcontent = DBA::selectFirst('item-content', ['uri-id'], ['plink' => $uris]);
3756                 if (!DBA::isResult($itemcontent)) {
3757                         return 0;
3758                 }
3759
3760                 $itemuri = DBA::selectFirst('item-uri', ['uri'], ['id' => $itemcontent['uri-id']]);
3761                 if (!DBA::isResult($itemuri)) {
3762                         return 0;
3763                 }
3764
3765                 $item = DBA::selectFirst('item', ['id'], ['uri' => $itemuri['uri'], 'uid' => $uid]);
3766                 if (DBA::isResult($item)) {
3767                         return $item['id'];
3768                 }
3769
3770                 return 0;
3771         }
3772
3773         /**
3774          * Return the URI for a link to the post
3775          *
3776          * @param string $uri URI or link to post
3777          *
3778          * @return string URI
3779          */
3780         public static function getURIByLink(string $uri)
3781         {
3782                 $ssl_uri = str_replace('http://', 'https://', $uri);
3783                 $uris = [$uri, $ssl_uri, Strings::normaliseLink($uri)];
3784
3785                 $item = DBA::selectFirst('item', ['uri'], ['uri' => $uris]);
3786                 if (DBA::isResult($item)) {
3787                         return $item['uri'];
3788                 }
3789
3790                 $itemcontent = DBA::selectFirst('item-content', ['uri-id'], ['plink' => $uris]);
3791                 if (!DBA::isResult($itemcontent)) {
3792                         return '';
3793                 }
3794
3795                 $itemuri = DBA::selectFirst('item-uri', ['uri'], ['id' => $itemcontent['uri-id']]);
3796                 if (DBA::isResult($itemuri)) {
3797                         return $itemuri['uri'];
3798                 }
3799
3800                 return '';
3801         }
3802
3803         /**
3804          * Fetches item for given URI or plink
3805          *
3806          * @param string $uri
3807          * @param integer $uid
3808          *
3809          * @return integer item id
3810          */
3811         public static function fetchByLink($uri, $uid = 0)
3812         {
3813                 $item_id = self::searchByLink($uri, $uid);
3814                 if (!empty($item_id)) {
3815                         return $item_id;
3816                 }
3817
3818                 if ($fetched_uri = ActivityPub\Processor::fetchMissingActivity($uri)) {
3819                         $item_id = self::searchByLink($fetched_uri, $uid);
3820                 } else {
3821                         $item_id = Diaspora::fetchByURL($uri);
3822                 }
3823
3824                 if (!empty($item_id)) {
3825                         return $item_id;
3826                 }
3827
3828                 return 0;
3829         }
3830
3831         /**
3832          * Return share data from an item array (if the item is shared item)
3833          * We are providing the complete Item array, because at some time in the future
3834          * we hopefully will define these values not in the body anymore but in some item fields.
3835          * This function is meant to replace all similar functions in the system.
3836          *
3837          * @param array $item
3838          *
3839          * @return array with share information
3840          */
3841         public static function getShareArray($item)
3842         {
3843                 if (!preg_match("/(.*?)\[share(.*?)\]\s?(.*?)\s?\[\/share\]\s?/ism", $item['body'], $matches)) {
3844                         return [];
3845                 }
3846
3847                 $attribute_string = $matches[2];
3848                 $attributes = ['comment' => trim($matches[1]), 'shared' => trim($matches[3])];
3849                 foreach (['author', 'profile', 'avatar', 'guid', 'posted', 'link'] as $field) {
3850                         if (preg_match("/$field=(['\"])(.+?)\\1/ism", $attribute_string, $matches)) {
3851                                 $attributes[$field] = trim(html_entity_decode($matches[2] ?? '', ENT_QUOTES, 'UTF-8'));
3852                         }
3853                 }
3854                 return $attributes;
3855         }
3856
3857         /**
3858          * Fetch item information for shared items from the original items and adds it.
3859          *
3860          * @param array $item
3861          *
3862          * @return array item array with data from the original item
3863          */
3864         public static function addShareDataFromOriginal($item)
3865         {
3866                 $shared = self::getShareArray($item);
3867                 if (empty($shared)) {
3868                         return $item;
3869                 }
3870
3871                 // Real reshares always have got a GUID.
3872                 if (empty($shared['guid'])) {
3873                         return $item;
3874                 }
3875
3876                 $uid = $item['uid'] ?? 0;
3877
3878                 // first try to fetch the item via the GUID. This will work for all reshares that had been created on this system
3879                 $shared_item = self::selectFirst(['title', 'body', 'attach'], ['guid' => $shared['guid'], 'uid' => [0, $uid]]);
3880                 if (!DBA::isResult($shared_item)) {
3881                         if (empty($shared['link'])) {
3882                                 return $item;
3883                         }
3884
3885                         // Otherwhise try to find (and possibly fetch) the item via the link. This should work for Diaspora and ActivityPub posts
3886                         $id = self::fetchByLink($shared['link'], $uid);
3887                         if (empty($id)) {
3888                                 Logger::info('Original item not found', ['url' => $shared['link'], 'callstack' => System::callstack()]);
3889                                 return $item;
3890                         }
3891
3892                         $shared_item = self::selectFirst(['title', 'body', 'attach'], ['id' => $id]);
3893                         if (!DBA::isResult($shared_item)) {
3894                                 return $item;
3895                         }
3896                         Logger::info('Got shared data from url', ['url' => $shared['link'], 'callstack' => System::callstack()]);
3897                 } else {
3898                         Logger::info('Got shared data from guid', ['guid' => $shared['guid'], 'callstack' => System::callstack()]);
3899                 }
3900
3901                 if (!empty($shared_item['title'])) {
3902                         $body = '[h3]' . $shared_item['title'] . "[/h3]\n" . $shared_item['body'];
3903                         unset($shared_item['title']);
3904                 } else {
3905                         $body = $shared_item['body'];
3906                 }
3907
3908                 $item['body'] = preg_replace("/\[share ([^\[\]]*)\].*\[\/share\]/ism", '[share $1]' . $body . '[/share]', $item['body']);
3909                 unset($shared_item['body']);
3910
3911                 return array_merge($item, $shared_item);
3912         }
3913 }