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                                         $fields = ['cid' => $parent['author-id'], 'relation-cid' => $item['author-id']];
1757                                         if (!DBA::exists('contact-relation', $fields)) {
1758                                                 DBA::insert('contact-relation', $fields, true);
1759                                         }
1760                                 }
1761                 } else {
1762                                 /*
1763                                  * Allow one to see reply tweets from status.net even when
1764                                  * we don't have or can't see the original post.
1765                                  */
1766                                 if ($force_parent) {
1767                                         Logger::log('$force_parent=true, reply converted to top-level post.');
1768                                         $parent_id = 0;
1769                                         $item['parent-uri'] = $item['uri'];
1770                                         $item['gravity'] = GRAVITY_PARENT;
1771                                 } else {
1772                                         Logger::log('item parent '.$item['parent-uri'].' for '.$item['uid'].' was not found - ignoring item');
1773                                         return 0;
1774                                 }
1775
1776                                 $parent_deleted = 0;
1777                         }
1778                 }
1779
1780                 if (stristr($item['verb'], Activity::POKE)) {
1781                         $notify_type = Delivery::POKE;
1782                 }
1783
1784                 $item['parent-uri-id'] = ItemURI::getIdByURI($item['parent-uri']);
1785                 $item['thr-parent-id'] = ItemURI::getIdByURI($item['thr-parent']);
1786
1787                 $condition = ["`uri` = ? AND `network` IN (?, ?) AND `uid` = ?",
1788                         $item['uri'], $item['network'], Protocol::DFRN, $item['uid']];
1789                 if (self::exists($condition)) {
1790                         Logger::log('duplicated item with the same uri found. '.print_r($item,true));
1791                         return 0;
1792                 }
1793
1794                 // On Friendica and Diaspora the GUID is unique
1795                 if (in_array($item['network'], [Protocol::DFRN, Protocol::DIASPORA])) {
1796                         $condition = ['guid' => $item['guid'], 'uid' => $item['uid']];
1797                         if (self::exists($condition)) {
1798                                 Logger::log('duplicated item with the same guid found. '.print_r($item,true));
1799                                 return 0;
1800                         }
1801                 } elseif ($item['network'] == Protocol::OSTATUS) {
1802                         // Check for an existing post with the same content. There seems to be a problem with OStatus.
1803                         $condition = ["`body` = ? AND `network` = ? AND `created` = ? AND `contact-id` = ? AND `uid` = ?",
1804                                         $item['body'], $item['network'], $item['created'], $item['contact-id'], $item['uid']];
1805                         if (self::exists($condition)) {
1806                                 Logger::log('duplicated item with the same body found. '.print_r($item,true));
1807                                 return 0;
1808                         }
1809                 }
1810
1811                 // Is this item available in the global items (with uid=0)?
1812                 if ($item["uid"] == 0) {
1813                         $item["global"] = true;
1814
1815                         // Set the global flag on all items if this was a global item entry
1816                         DBA::update('item', ['global' => true], ['uri' => $item["uri"]]);
1817                 } else {
1818                         $item["global"] = self::exists(['uid' => 0, 'uri' => $item["uri"]]);
1819                 }
1820
1821                 // ACL settings
1822                 if (strlen($allow_cid) || strlen($allow_gid) || strlen($deny_cid) || strlen($deny_gid)) {
1823                         $private = self::PRIVATE;
1824                 } else {
1825                         $private = $item['private'];
1826                 }
1827
1828                 $item["allow_cid"] = $allow_cid;
1829                 $item["allow_gid"] = $allow_gid;
1830                 $item["deny_cid"] = $deny_cid;
1831                 $item["deny_gid"] = $deny_gid;
1832                 $item["private"] = $private;
1833                 $item["deleted"] = $parent_deleted;
1834
1835                 // Fill the cache field
1836                 self::putInCache($item);
1837
1838                 if ($notify) {
1839                         $item['edit'] = false;
1840                         $item['parent'] = $parent_id;
1841                         Hook::callAll('post_local', $item);
1842                         unset($item['edit']);
1843                         unset($item['parent']);
1844                 } else {
1845                         Hook::callAll('post_remote', $item);
1846                 }
1847
1848                 // This array field is used to trigger some automatic reactions
1849                 // It is mainly used in the "post_local" hook.
1850                 unset($item['api_source']);
1851
1852                 if (!empty($item['cancel'])) {
1853                         Logger::log('post cancelled by addon.');
1854                         return 0;
1855                 }
1856
1857                 /*
1858                  * Check for already added items.
1859                  * There is a timing issue here that sometimes creates double postings.
1860                  * An unique index would help - but the limitations of MySQL (maximum size of index values) prevent this.
1861                  */
1862                 if ($item["uid"] == 0) {
1863                         if (self::exists(['uri' => trim($item['uri']), 'uid' => 0])) {
1864                                 Logger::log('Global item already stored. URI: '.$item['uri'].' on network '.$item['network'], Logger::DEBUG);
1865                                 return 0;
1866                         }
1867                 }
1868
1869                 Logger::log('' . print_r($item,true), Logger::DATA);
1870
1871                 if (array_key_exists('tag', $item)) {
1872                         $tags = $item['tag'];
1873                         unset($item['tag']);
1874                 } else {
1875                         $tags = '';
1876                 }
1877
1878                 if (array_key_exists('file', $item)) {
1879                         $files = $item['file'];
1880                         unset($item['file']);
1881                 } else {
1882                         $files = '';
1883                 }
1884
1885                 // Creates or assigns the permission set
1886                 $item['psid'] = PermissionSet::getIdFromACL(
1887                         $item['uid'],
1888                         $item['allow_cid'],
1889                         $item['allow_gid'],
1890                         $item['deny_cid'],
1891                         $item['deny_gid']
1892                 );
1893
1894                 $item['allow_cid'] = null;
1895                 $item['allow_gid'] = null;
1896                 $item['deny_cid'] = null;
1897                 $item['deny_gid'] = null;
1898
1899                 // We are doing this outside of the transaction to avoid timing problems
1900                 if (!self::insertActivity($item)) {
1901                         self::insertContent($item);
1902                 }
1903
1904                 $delivery_data = ItemDeliveryData::extractFields($item);
1905
1906                 unset($item['postopts']);
1907                 unset($item['inform']);
1908
1909                 // These fields aren't stored anymore in the item table, they are fetched upon request
1910                 unset($item['author-link']);
1911                 unset($item['author-name']);
1912                 unset($item['author-avatar']);
1913                 unset($item['author-network']);
1914
1915                 unset($item['owner-link']);
1916                 unset($item['owner-name']);
1917                 unset($item['owner-avatar']);
1918
1919                 $like_no_comment = DI::config()->get('system', 'like_no_comment');
1920
1921                 DBA::transaction();
1922                 $ret = DBA::insert('item', $item);
1923
1924                 // When the item was successfully stored we fetch the ID of the item.
1925                 if (DBA::isResult($ret)) {
1926                         $current_post = DBA::lastInsertId();
1927                 } else {
1928                         // This can happen - for example - if there are locking timeouts.
1929                         DBA::rollback();
1930
1931                         // Store the data into a spool file so that we can try again later.
1932                         self::spool($orig_item);
1933                         return 0;
1934                 }
1935
1936                 if ($current_post == 0) {
1937                         // This is one of these error messages that never should occur.
1938                         Logger::log("couldn't find created item - we better quit now.");
1939                         DBA::rollback();
1940                         return 0;
1941                 }
1942
1943                 // How much entries have we created?
1944                 // We wouldn't need this query when we could use an unique index - but MySQL has length problems with them.
1945                 $entries = DBA::count('item', ['uri' => $item['uri'], 'uid' => $item['uid'], 'network' => $item['network']]);
1946
1947                 if ($entries > 1) {
1948                         // There are duplicates. We delete our just created entry.
1949                         Logger::info('Delete duplicated item', ['id' => $current_post, 'uri' => $item['uri'], 'uid' => $item['uid'], 'guid' => $item['guid']]);
1950
1951                         // Yes, we could do a rollback here - but we are having many users with MyISAM.
1952                         DBA::delete('item', ['id' => $current_post]);
1953                         DBA::commit();
1954                         return 0;
1955                 } elseif ($entries == 0) {
1956                         // This really should never happen since we quit earlier if there were problems.
1957                         Logger::log("Something is terribly wrong. We haven't found our created entry.");
1958                         DBA::rollback();
1959                         return 0;
1960                 }
1961
1962                 Logger::log('created item '.$current_post);
1963
1964                 if (!$parent_id || ($item['parent-uri'] === $item['uri'])) {
1965                         $parent_id = $current_post;
1966                 }
1967
1968                 // Set parent id
1969                 DBA::update('item', ['parent' => $parent_id], ['id' => $current_post]);
1970
1971                 $item['id'] = $current_post;
1972                 $item['parent'] = $parent_id;
1973
1974                 // update the commented timestamp on the parent
1975                 // Only update "commented" if it is really a comment
1976                 if (($item['gravity'] != GRAVITY_ACTIVITY) || !$like_no_comment) {
1977                         DBA::update('item', ['commented' => DateTimeFormat::utcNow(), 'changed' => DateTimeFormat::utcNow()], ['id' => $parent_id]);
1978                 } else {
1979                         DBA::update('item', ['changed' => DateTimeFormat::utcNow()], ['id' => $parent_id]);
1980                 }
1981
1982                 if ($dsprsig) {
1983                         /*
1984                          * Friendica servers lower than 3.4.3-2 had double encoded the signature ...
1985                          * We can check for this condition when we decode and encode the stuff again.
1986                          */
1987                         if (base64_encode(base64_decode(base64_decode($dsprsig->signature))) == base64_decode($dsprsig->signature)) {
1988                                 $dsprsig->signature = base64_decode($dsprsig->signature);
1989                                 Logger::log("Repaired double encoded signature from handle ".$dsprsig->signer, Logger::DEBUG);
1990                         }
1991
1992                         if (!empty($dsprsig->signed_text) && empty($dsprsig->signature) && empty($dsprsig->signer)) {
1993                                 DBA::insert('diaspora-interaction', ['uri-id' => $item['uri-id'], 'interaction' => $dsprsig->signed_text], true);
1994                         } else {
1995                                 // The other fields are used by very old Friendica servers, so we currently store them differently
1996                                 DBA::insert('sign', ['iid' => $current_post, 'signed_text' => $dsprsig->signed_text,
1997                                         'signature' => $dsprsig->signature, 'signer' => $dsprsig->signer]);
1998                         }
1999                 }
2000
2001                 if (!empty($diaspora_signed_text)) {
2002                         DBA::insert('diaspora-interaction', ['uri-id' => $item['uri-id'], 'interaction' => $diaspora_signed_text], true);
2003                 }
2004
2005                 if ($item['parent-uri'] === $item['uri']) {
2006                         self::addThread($current_post);
2007                 } else {
2008                         self::updateThread($parent_id);
2009                 }
2010
2011                 if (!empty($item['origin']) || !empty($item['wall']) || !empty($delivery_data['postopts']) || !empty($delivery_data['inform'])) {
2012                         ItemDeliveryData::insert($current_post, $delivery_data);
2013                 }
2014
2015                 DBA::commit();
2016
2017                 /*
2018                  * Due to deadlock issues with the "term" table we are doing these steps after the commit.
2019                  * This is not perfect - but a workable solution until we found the reason for the problem.
2020                  */
2021                 if (!empty($tags)) {
2022                         Term::insertFromTagFieldByItemId($current_post, $tags);
2023                 }
2024
2025                 if (!empty($files)) {
2026                         Term::insertFromFileFieldByItemId($current_post, $files);
2027                 }
2028
2029                 // In that function we check if this is a forum post. Additionally we delete the item under certain circumstances
2030                 if (self::tagDeliver($item['uid'], $current_post)) {
2031                         // Get the user information for the logging
2032                         $user = User::getById($uid);
2033
2034                         Logger::notice('Item had been deleted', ['id' => $current_post, 'user' => $uid, 'account-type' => $user['account-type']]);
2035                         return 0;
2036                 }
2037
2038                 if (!$dontcache) {
2039                         $posted_item = self::selectFirst(self::ITEM_FIELDLIST, ['id' => $current_post]);
2040                         if (DBA::isResult($posted_item)) {
2041                                 if ($notify) {
2042                                         Hook::callAll('post_local_end', $posted_item);
2043                                 } else {
2044                                         Hook::callAll('post_remote_end', $posted_item);
2045                                 }
2046                         } else {
2047                                 Logger::log('new item not found in DB, id ' . $current_post);
2048                         }
2049                 }
2050
2051                 if ($item['parent-uri'] === $item['uri']) {
2052                         self::addShadow($current_post);
2053                 } else {
2054                         self::addShadowPost($current_post);
2055                 }
2056
2057                 self::updateContact($item);
2058
2059                 UserItem::setNotification($current_post);
2060
2061                 check_user_notification($current_post);
2062
2063                 if ($notify || ($item['visible'] && ((!empty($parent) && $parent['origin']) || $item['origin']))) {
2064                         Worker::add(['priority' => $priority, 'dont_fork' => true], 'Notifier', $notify_type, $current_post);
2065                 }
2066
2067                 return $current_post;
2068         }
2069
2070         /**
2071          * Insert a new item content entry
2072          *
2073          * @param array $item The item fields that are to be inserted
2074          * @return bool
2075          * @throws \Exception
2076          */
2077         private static function insertActivity(&$item)
2078         {
2079                 $activity_index = self::activityToIndex($item['verb']);
2080
2081                 if ($activity_index < 0) {
2082                         return false;
2083                 }
2084
2085                 $fields = ['activity' => $activity_index, 'uri-hash' => (string)$item['uri-id'], 'uri-id' => $item['uri-id']];
2086
2087                 // We just remove everything that is content
2088                 foreach (array_merge(self::CONTENT_FIELDLIST, self::MIXED_CONTENT_FIELDLIST) as $field) {
2089                         unset($item[$field]);
2090                 }
2091
2092                 // To avoid timing problems, we are using locks.
2093                 $locked = DI::lock()->acquire('item_insert_activity');
2094                 if (!$locked) {
2095                         Logger::log("Couldn't acquire lock for URI " . $item['uri'] . " - proceeding anyway.");
2096                 }
2097
2098                 // Do we already have this content?
2099                 $item_activity = DBA::selectFirst('item-activity', ['id'], ['uri-id' => $item['uri-id']]);
2100                 if (DBA::isResult($item_activity)) {
2101                         $item['iaid'] = $item_activity['id'];
2102                         Logger::log('Fetched activity for URI ' . $item['uri'] . ' (' . $item['iaid'] . ')');
2103                 } elseif (DBA::insert('item-activity', $fields)) {
2104                         $item['iaid'] = DBA::lastInsertId();
2105                         Logger::log('Inserted activity for URI ' . $item['uri'] . ' (' . $item['iaid'] . ')');
2106                 } else {
2107                         // This shouldn't happen.
2108                         Logger::log('Could not insert activity for URI ' . $item['uri'] . ' - should not happen');
2109                         DI::lock()->release('item_insert_activity');
2110                         return false;
2111                 }
2112                 if ($locked) {
2113                         DI::lock()->release('item_insert_activity');
2114                 }
2115                 return true;
2116         }
2117
2118         /**
2119          * Insert a new item content entry
2120          *
2121          * @param array $item The item fields that are to be inserted
2122          * @throws \Exception
2123          */
2124         private static function insertContent(&$item)
2125         {
2126                 $fields = ['uri-plink-hash' => (string)$item['uri-id'], 'uri-id' => $item['uri-id']];
2127
2128                 foreach (array_merge(self::CONTENT_FIELDLIST, self::MIXED_CONTENT_FIELDLIST) as $field) {
2129                         if (isset($item[$field])) {
2130                                 $fields[$field] = $item[$field];
2131                                 unset($item[$field]);
2132                         }
2133                 }
2134
2135                 // To avoid timing problems, we are using locks.
2136                 $locked = DI::lock()->acquire('item_insert_content');
2137                 if (!$locked) {
2138                         Logger::log("Couldn't acquire lock for URI " . $item['uri'] . " - proceeding anyway.");
2139                 }
2140
2141                 // Do we already have this content?
2142                 $item_content = DBA::selectFirst('item-content', ['id'], ['uri-id' => $item['uri-id']]);
2143                 if (DBA::isResult($item_content)) {
2144                         $item['icid'] = $item_content['id'];
2145                         Logger::log('Fetched content for URI ' . $item['uri'] . ' (' . $item['icid'] . ')');
2146                 } elseif (DBA::insert('item-content', $fields)) {
2147                         $item['icid'] = DBA::lastInsertId();
2148                         Logger::log('Inserted content for URI ' . $item['uri'] . ' (' . $item['icid'] . ')');
2149                 } else {
2150                         // This shouldn't happen.
2151                         Logger::log('Could not insert content for URI ' . $item['uri'] . ' - should not happen');
2152                 }
2153                 if ($locked) {
2154                         DI::lock()->release('item_insert_content');
2155                 }
2156         }
2157
2158         /**
2159          * Update existing item content entries
2160          *
2161          * @param array $item      The item fields that are to be changed
2162          * @param array $condition The condition for finding the item content entries
2163          * @return bool
2164          * @throws \Exception
2165          */
2166         private static function updateActivity($item, $condition)
2167         {
2168                 if (empty($item['verb'])) {
2169                         return false;
2170                 }
2171                 $activity_index = self::activityToIndex($item['verb']);
2172
2173                 if ($activity_index < 0) {
2174                         return false;
2175                 }
2176
2177                 $fields = ['activity' => $activity_index];
2178
2179                 Logger::log('Update activity for ' . json_encode($condition));
2180
2181                 DBA::update('item-activity', $fields, $condition, true);
2182
2183                 return true;
2184         }
2185
2186         /**
2187          * Update existing item content entries
2188          *
2189          * @param array $item      The item fields that are to be changed
2190          * @param array $condition The condition for finding the item content entries
2191          * @throws \Exception
2192          */
2193         private static function updateContent($item, $condition)
2194         {
2195                 // We have to select only the fields from the "item-content" table
2196                 $fields = [];
2197                 foreach (array_merge(self::CONTENT_FIELDLIST, self::MIXED_CONTENT_FIELDLIST) as $field) {
2198                         if (isset($item[$field])) {
2199                                 $fields[$field] = $item[$field];
2200                         }
2201                 }
2202
2203                 if (empty($fields)) {
2204                         // when there are no fields at all, just use the condition
2205                         // This is to ensure that we always store content.
2206                         $fields = $condition;
2207                 }
2208
2209                 Logger::log('Update content for ' . json_encode($condition));
2210
2211                 DBA::update('item-content', $fields, $condition, true);
2212         }
2213
2214         /**
2215          * Distributes public items to the receivers
2216          *
2217          * @param integer $itemid      Item ID that should be added
2218          * @param string  $signed_text Original text (for Diaspora signatures), JSON encoded.
2219          * @throws \Exception
2220          */
2221         public static function distribute($itemid, $signed_text = '')
2222         {
2223                 $condition = ["`id` IN (SELECT `parent` FROM `item` WHERE `id` = ?)", $itemid];
2224                 $parent = self::selectFirst(['owner-id'], $condition);
2225                 if (!DBA::isResult($parent)) {
2226                         return;
2227                 }
2228
2229                 // Only distribute public items from native networks
2230                 $condition = ['id' => $itemid, 'uid' => 0,
2231                         'network' => array_merge(Protocol::FEDERATED ,['']),
2232                         'visible' => true, 'deleted' => false, 'moderated' => false, 'private' => [self::PUBLIC, self::UNLISTED]];
2233                 $item = self::selectFirst(self::ITEM_FIELDLIST, $condition);
2234                 if (!DBA::isResult($item)) {
2235                         return;
2236                 }
2237
2238                 $origin = $item['origin'];
2239
2240                 unset($item['id']);
2241                 unset($item['parent']);
2242                 unset($item['mention']);
2243                 unset($item['wall']);
2244                 unset($item['origin']);
2245                 unset($item['starred']);
2246
2247                 $users = [];
2248
2249                 /// @todo add a field "pcid" in the contact table that referrs to the public contact id.
2250                 $owner = DBA::selectFirst('contact', ['url', 'nurl', 'alias'], ['id' => $parent['owner-id']]);
2251                 if (!DBA::isResult($owner)) {
2252                         return;
2253                 }
2254
2255                 $condition = ['nurl' => $owner['nurl'], 'rel' => [Contact::SHARING, Contact::FRIEND]];
2256                 $contacts = DBA::select('contact', ['uid'], $condition);
2257                 while ($contact = DBA::fetch($contacts)) {
2258                         if ($contact['uid'] == 0) {
2259                                 continue;
2260                         }
2261
2262                         $users[$contact['uid']] = $contact['uid'];
2263                 }
2264                 DBA::close($contacts);
2265
2266                 $condition = ['alias' => $owner['url'], 'rel' => [Contact::SHARING, Contact::FRIEND]];
2267                 $contacts = DBA::select('contact', ['uid'], $condition);
2268                 while ($contact = DBA::fetch($contacts)) {
2269                         if ($contact['uid'] == 0) {
2270                                 continue;
2271                         }
2272
2273                         $users[$contact['uid']] = $contact['uid'];
2274                 }
2275                 DBA::close($contacts);
2276
2277                 if (!empty($owner['alias'])) {
2278                         $condition = ['url' => $owner['alias'], 'rel' => [Contact::SHARING, Contact::FRIEND]];
2279                         $contacts = DBA::select('contact', ['uid'], $condition);
2280                         while ($contact = DBA::fetch($contacts)) {
2281                                 if ($contact['uid'] == 0) {
2282                                         continue;
2283                                 }
2284
2285                                 $users[$contact['uid']] = $contact['uid'];
2286                         }
2287                         DBA::close($contacts);
2288                 }
2289
2290                 $origin_uid = 0;
2291
2292                 if ($item['uri'] != $item['parent-uri']) {
2293                         $parents = self::select(['uid', 'origin'], ["`uri` = ? AND `uid` != 0", $item['parent-uri']]);
2294                         while ($parent = self::fetch($parents)) {
2295                                 $users[$parent['uid']] = $parent['uid'];
2296                                 if ($parent['origin'] && !$origin) {
2297                                         $origin_uid = $parent['uid'];
2298                                 }
2299                         }
2300                 }
2301
2302                 foreach ($users as $uid) {
2303                         if ($origin_uid == $uid) {
2304                                 $item['diaspora_signed_text'] = $signed_text;
2305                         }
2306                         self::storeForUser($itemid, $item, $uid);
2307                 }
2308         }
2309
2310         /**
2311          * Store public items for the receivers
2312          *
2313          * @param integer $itemid Item ID that should be added
2314          * @param array   $item   The item entry that will be stored
2315          * @param integer $uid    The user that will receive the item entry
2316          * @throws \Exception
2317          */
2318         private static function storeForUser($itemid, $item, $uid)
2319         {
2320                 $item['uid'] = $uid;
2321                 $item['origin'] = 0;
2322                 $item['wall'] = 0;
2323                 if ($item['uri'] == $item['parent-uri']) {
2324                         $item['contact-id'] = Contact::getIdForURL($item['owner-link'], $uid);
2325                 } else {
2326                         $item['contact-id'] = Contact::getIdForURL($item['author-link'], $uid);
2327                 }
2328
2329                 if (empty($item['contact-id'])) {
2330                         $self = DBA::selectFirst('contact', ['id'], ['self' => true, 'uid' => $uid]);
2331                         if (!DBA::isResult($self)) {
2332                                 return;
2333                         }
2334                         $item['contact-id'] = $self['id'];
2335                 }
2336
2337                 /// @todo Handling of "event-id"
2338
2339                 $notify = false;
2340                 if ($item['uri'] == $item['parent-uri']) {
2341                         $contact = DBA::selectFirst('contact', [], ['id' => $item['contact-id'], 'self' => false]);
2342                         if (DBA::isResult($contact)) {
2343                                 $notify = self::isRemoteSelf($contact, $item);
2344                         }
2345                 }
2346
2347                 $distributed = self::insert($item, false, $notify, true);
2348
2349                 if (!$distributed) {
2350                         Logger::log("Distributed public item " . $itemid . " for user " . $uid . " wasn't stored", Logger::DEBUG);
2351                 } else {
2352                         Logger::log("Distributed public item " . $itemid . " for user " . $uid . " with id " . $distributed, Logger::DEBUG);
2353                 }
2354         }
2355
2356         /**
2357          * Add a shadow entry for a given item id that is a thread starter
2358          *
2359          * We store every public item entry additionally with the user id "0".
2360          * This is used for the community page and for the search.
2361          * It is planned that in the future we will store public item entries only once.
2362          *
2363          * @param integer $itemid Item ID that should be added
2364          * @throws \Exception
2365          */
2366         public static function addShadow($itemid)
2367         {
2368                 $fields = ['uid', 'private', 'moderated', 'visible', 'deleted', 'network', 'uri'];
2369                 $condition = ['id' => $itemid, 'parent' => [0, $itemid]];
2370                 $item = self::selectFirst($fields, $condition);
2371
2372                 if (!DBA::isResult($item)) {
2373                         return;
2374                 }
2375
2376                 // is it already a copy?
2377                 if (($itemid == 0) || ($item['uid'] == 0)) {
2378                         return;
2379                 }
2380
2381                 // Is it a visible public post?
2382                 if (!$item["visible"] || $item["deleted"] || $item["moderated"] || ($item["private"] == Item::PRIVATE)) {
2383                         return;
2384                 }
2385
2386                 // is it an entry from a connector? Only add an entry for natively connected networks
2387                 if (!in_array($item["network"], array_merge(Protocol::FEDERATED ,['']))) {
2388                         return;
2389                 }
2390
2391                 if (self::exists(['uri' => $item['uri'], 'uid' => 0])) {
2392                         return;
2393                 }
2394
2395                 $item = self::selectFirst(self::ITEM_FIELDLIST, ['id' => $itemid]);
2396
2397                 if (DBA::isResult($item)) {
2398                         // Preparing public shadow (removing user specific data)
2399                         $item['uid'] = 0;
2400                         unset($item['id']);
2401                         unset($item['parent']);
2402                         unset($item['wall']);
2403                         unset($item['mention']);
2404                         unset($item['origin']);
2405                         unset($item['starred']);
2406                         unset($item['postopts']);
2407                         unset($item['inform']);
2408                         if ($item['uri'] == $item['parent-uri']) {
2409                                 $item['contact-id'] = $item['owner-id'];
2410                         } else {
2411                                 $item['contact-id'] = $item['author-id'];
2412                         }
2413
2414                         $public_shadow = self::insert($item, false, false, true);
2415
2416                         Logger::log("Stored public shadow for thread ".$itemid." under id ".$public_shadow, Logger::DEBUG);
2417                 }
2418         }
2419
2420         /**
2421          * Add a shadow entry for a given item id that is a comment
2422          *
2423          * This function does the same like the function above - but for comments
2424          *
2425          * @param integer $itemid Item ID that should be added
2426          * @throws \Exception
2427          */
2428         public static function addShadowPost($itemid)
2429         {
2430                 $item = self::selectFirst(self::ITEM_FIELDLIST, ['id' => $itemid]);
2431                 if (!DBA::isResult($item)) {
2432                         return;
2433                 }
2434
2435                 // Is it a toplevel post?
2436                 if ($item['id'] == $item['parent']) {
2437                         self::addShadow($itemid);
2438                         return;
2439                 }
2440
2441                 // Is this a shadow entry?
2442                 if ($item['uid'] == 0) {
2443                         return;
2444                 }
2445
2446                 // Is there a shadow parent?
2447                 if (!self::exists(['uri' => $item['parent-uri'], 'uid' => 0])) {
2448                         return;
2449                 }
2450
2451                 // Is there already a shadow entry?
2452                 if (self::exists(['uri' => $item['uri'], 'uid' => 0])) {
2453                         return;
2454                 }
2455
2456                 // Save "origin" and "parent" state
2457                 $origin = $item['origin'];
2458                 $parent = $item['parent'];
2459
2460                 // Preparing public shadow (removing user specific data)
2461                 $item['uid'] = 0;
2462                 unset($item['id']);
2463                 unset($item['parent']);
2464                 unset($item['wall']);
2465                 unset($item['mention']);
2466                 unset($item['origin']);
2467                 unset($item['starred']);
2468                 unset($item['postopts']);
2469                 unset($item['inform']);
2470                 $item['contact-id'] = Contact::getIdForURL($item['author-link']);
2471
2472                 $public_shadow = self::insert($item, false, false, true);
2473
2474                 Logger::log("Stored public shadow for comment ".$item['uri']." under id ".$public_shadow, Logger::DEBUG);
2475
2476                 // If this was a comment to a Diaspora post we don't get our comment back.
2477                 // This means that we have to distribute the comment by ourselves.
2478                 if ($origin && self::exists(['id' => $parent, 'network' => Protocol::DIASPORA])) {
2479                         self::distribute($public_shadow);
2480                 }
2481         }
2482
2483         /**
2484          * Adds a language specification in a "language" element of given $arr.
2485          * Expects "body" element to exist in $arr.
2486          *
2487          * @param $item
2488          * @throws \Text_LanguageDetect_Exception
2489          */
2490         private static function addLanguageToItemArray(&$item)
2491         {
2492                 $naked_body = BBCode::toPlaintext($item['body'], false);
2493
2494                 $ld = new Text_LanguageDetect();
2495                 $ld->setNameMode(2);
2496                 $languages = $ld->detect($naked_body, 3);
2497
2498                 if (is_array($languages)) {
2499                         $item['language'] = json_encode($languages);
2500                 }
2501         }
2502
2503         /**
2504          * Creates an unique guid out of a given uri
2505          *
2506          * @param string $uri uri of an item entry
2507          * @param string $host hostname for the GUID prefix
2508          * @return string unique guid
2509          */
2510         public static function guidFromUri($uri, $host)
2511         {
2512                 // Our regular guid routine is using this kind of prefix as well
2513                 // We have to avoid that different routines could accidentally create the same value
2514                 $parsed = parse_url($uri);
2515
2516                 // We use a hash of the hostname as prefix for the guid
2517                 $guid_prefix = hash("crc32", $host);
2518
2519                 // Remove the scheme to make sure that "https" and "http" doesn't make a difference
2520                 unset($parsed["scheme"]);
2521
2522                 // Glue it together to be able to make a hash from it
2523                 $host_id = implode("/", $parsed);
2524
2525                 // We could use any hash algorithm since it isn't a security issue
2526                 $host_hash = hash("ripemd128", $host_id);
2527
2528                 return $guid_prefix.$host_hash;
2529         }
2530
2531         /**
2532          * generate an unique URI
2533          *
2534          * @param integer $uid  User id
2535          * @param string  $guid An existing GUID (Otherwise it will be generated)
2536          *
2537          * @return string
2538          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
2539          */
2540         public static function newURI($uid, $guid = "")
2541         {
2542                 if ($guid == "") {
2543                         $guid = System::createUUID();
2544                 }
2545
2546                 return DI::baseUrl()->get() . '/objects/' . $guid;
2547         }
2548
2549         /**
2550          * Set "success_update" and "last-item" to the date of the last time we heard from this contact
2551          *
2552          * This can be used to filter for inactive contacts.
2553          * Only do this for public postings to avoid privacy problems, since poco data is public.
2554          * Don't set this value if it isn't from the owner (could be an author that we don't know)
2555          *
2556          * @param array $arr Contains the just posted item record
2557          * @throws \Exception
2558          */
2559         private static function updateContact($arr)
2560         {
2561                 // Unarchive the author
2562                 $contact = DBA::selectFirst('contact', [], ['id' => $arr["author-id"]]);
2563                 if (DBA::isResult($contact)) {
2564                         Contact::unmarkForArchival($contact);
2565                 }
2566
2567                 // Unarchive the contact if it's not our own contact
2568                 $contact = DBA::selectFirst('contact', [], ['id' => $arr["contact-id"], 'self' => false]);
2569                 if (DBA::isResult($contact)) {
2570                         Contact::unmarkForArchival($contact);
2571                 }
2572
2573                 $update = (($arr['private'] != self::PRIVATE) && ((($arr['author-link'] ?? '') === ($arr['owner-link'] ?? '')) || ($arr["parent-uri"] === $arr["uri"])));
2574
2575                 // Is it a forum? Then we don't care about the rules from above
2576                 if (!$update && in_array($arr["network"], [Protocol::ACTIVITYPUB, Protocol::DFRN]) && ($arr["parent-uri"] === $arr["uri"])) {
2577                         if (DBA::exists('contact', ['id' => $arr['contact-id'], 'forum' => true])) {
2578                                 $update = true;
2579                         }
2580                 }
2581
2582                 if ($update) {
2583                         DBA::update('contact', ['success_update' => $arr['received'], 'last-item' => $arr['received']],
2584                                 ['id' => $arr['contact-id']]);
2585                 }
2586                 // Now do the same for the system wide contacts with uid=0
2587                 if ($arr['private'] != self::PRIVATE) {
2588                         DBA::update('contact', ['success_update' => $arr['received'], 'last-item' => $arr['received']],
2589                                 ['id' => $arr['owner-id']]);
2590
2591                         if ($arr['owner-id'] != $arr['author-id']) {
2592                                 DBA::update('contact', ['success_update' => $arr['received'], 'last-item' => $arr['received']],
2593                                         ['id' => $arr['author-id']]);
2594                         }
2595                 }
2596         }
2597
2598         public static function setHashtags(&$item)
2599         {
2600                 $tags = BBCode::getTags($item["body"]);
2601
2602                 // No hashtags?
2603                 if (!count($tags)) {
2604                         return false;
2605                 }
2606
2607                 // What happens in [code], stays in [code]!
2608                 // escape the # and the [
2609                 // hint: we will also get in trouble with #tags, when we want markdown in posts -> ### Headline 3
2610                 $item["body"] = preg_replace_callback("/\[code(.*?)\](.*?)\[\/code\]/ism",
2611                         function ($match) {
2612                                 // we truly ESCape all # and [ to prevent gettin weird tags in [code] blocks
2613                                 $find = ['#', '['];
2614                                 $replace = [chr(27).'sharp', chr(27).'leftsquarebracket'];
2615                                 return ("[code" . $match[1] . "]" . str_replace($find, $replace, $match[2]) . "[/code]");
2616                         }, $item["body"]);
2617
2618                 // This sorting is important when there are hashtags that are part of other hashtags
2619                 // Otherwise there could be problems with hashtags like #test and #test2
2620                 rsort($tags);
2621
2622                 $URLSearchString = "^\[\]";
2623
2624                 // All hashtags should point to the home server if "local_tags" is activated
2625                 if (DI::config()->get('system', 'local_tags')) {
2626                         $item["body"] = preg_replace("/#\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",
2627                                         "#[url=".DI::baseUrl()."/search?tag=$2]$2[/url]", $item["body"]);
2628
2629                         $item["tag"] = preg_replace("/#\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",
2630                                         "#[url=".DI::baseUrl()."/search?tag=$2]$2[/url]", $item["tag"]);
2631                 }
2632
2633                 // mask hashtags inside of url, bookmarks and attachments to avoid urls in urls
2634                 $item["body"] = preg_replace_callback("/\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",
2635                         function ($match) {
2636                                 return ("[url=" . str_replace("#", "&num;", $match[1]) . "]" . str_replace("#", "&num;", $match[2]) . "[/url]");
2637                         }, $item["body"]);
2638
2639                 $item["body"] = preg_replace_callback("/\[bookmark\=([$URLSearchString]*)\](.*?)\[\/bookmark\]/ism",
2640                         function ($match) {
2641                                 return ("[bookmark=" . str_replace("#", "&num;", $match[1]) . "]" . str_replace("#", "&num;", $match[2]) . "[/bookmark]");
2642                         }, $item["body"]);
2643
2644                 $item["body"] = preg_replace_callback("/\[attachment (.*)\](.*?)\[\/attachment\]/ism",
2645                         function ($match) {
2646                                 return ("[attachment " . str_replace("#", "&num;", $match[1]) . "]" . $match[2] . "[/attachment]");
2647                         }, $item["body"]);
2648
2649                 // Repair recursive urls
2650                 $item["body"] = preg_replace("/&num;\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",
2651                                 "&num;$2", $item["body"]);
2652
2653                 foreach ($tags as $tag) {
2654                         if ((strpos($tag, '#') !== 0) || strpos($tag, '[url=') || strlen($tag) < 2 || $tag[1] == '#') {
2655                                 continue;
2656                         }
2657
2658                         $basetag = str_replace('_',' ',substr($tag,1));
2659                         $newtag = '#[url=' . DI::baseUrl() . '/search?tag=' . $basetag . ']' . $basetag . '[/url]';
2660
2661                         $item["body"] = str_replace($tag, $newtag, $item["body"]);
2662
2663                         if (!stristr($item["tag"], "/search?tag=" . $basetag . "]" . $basetag . "[/url]")) {
2664                                 if (strlen($item["tag"])) {
2665                                         $item["tag"] = ',' . $item["tag"];
2666                                 }
2667                                 $item["tag"] = $newtag . $item["tag"];
2668                         }
2669                 }
2670
2671                 // Convert back the masked hashtags
2672                 $item["body"] = str_replace("&num;", "#", $item["body"]);
2673
2674                 // Remember! What happens in [code], stays in [code]
2675                 // roleback the # and [
2676                 $item["body"] = preg_replace_callback("/\[code(.*?)\](.*?)\[\/code\]/ism",
2677                         function ($match) {
2678                                 // we truly unESCape all sharp and leftsquarebracket
2679                                 $find = [chr(27).'sharp', chr(27).'leftsquarebracket'];
2680                                 $replace = ['#', '['];
2681                                 return ("[code" . $match[1] . "]" . str_replace($find, $replace, $match[2]) . "[/code]");
2682                         }, $item["body"]);
2683         }
2684
2685         /**
2686          * look for mention tags and setup a second delivery chain for forum/community posts if appropriate
2687          *
2688          * @param int $uid
2689          * @param int $item_id
2690          * @return boolean true if item was deleted, else false
2691          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
2692          * @throws \ImagickException
2693          */
2694         private static function tagDeliver($uid, $item_id)
2695         {
2696                 $mention = false;
2697
2698                 $user = DBA::selectFirst('user', [], ['uid' => $uid]);
2699                 if (!DBA::isResult($user)) {
2700                         return false;
2701                 }
2702
2703                 $community_page = (($user['page-flags'] == User::PAGE_FLAGS_COMMUNITY) ? true : false);
2704                 $prvgroup = (($user['page-flags'] == User::PAGE_FLAGS_PRVGROUP) ? true : false);
2705
2706                 $item = self::selectFirst(self::ITEM_FIELDLIST, ['id' => $item_id]);
2707                 if (!DBA::isResult($item)) {
2708                         return false;
2709                 }
2710
2711                 $link = Strings::normaliseLink(DI::baseUrl() . '/profile/' . $user['nickname']);
2712
2713                 /*
2714                  * Diaspora uses their own hardwired link URL in @-tags
2715                  * instead of the one we supply with webfinger
2716                  */
2717                 $dlink = Strings::normaliseLink(DI::baseUrl() . '/u/' . $user['nickname']);
2718
2719                 $cnt = preg_match_all('/[\@\!]\[url\=(.*?)\](.*?)\[\/url\]/ism', $item['body'], $matches, PREG_SET_ORDER);
2720                 if ($cnt) {
2721                         foreach ($matches as $mtch) {
2722                                 if (Strings::compareLink($link, $mtch[1]) || Strings::compareLink($dlink, $mtch[1])) {
2723                                         $mention = true;
2724                                         Logger::log('mention found: ' . $mtch[2]);
2725                                 }
2726                         }
2727                 }
2728
2729                 if (!$mention) {
2730                         if (($community_page || $prvgroup) &&
2731                                   !$item['wall'] && !$item['origin'] && ($item['id'] == $item['parent'])) {
2732                                 Logger::info('Delete private group/communiy top-level item without mention', ['id' => $item_id, 'guid'=> $item['guid']]);
2733                                 DBA::delete('item', ['id' => $item_id]);
2734                                 return true;
2735                         }
2736                         return false;
2737                 }
2738
2739                 $arr = ['item' => $item, 'user' => $user];
2740
2741                 Hook::callAll('tagged', $arr);
2742
2743                 if (!$community_page && !$prvgroup) {
2744                         return false;
2745                 }
2746
2747                 /*
2748                  * tgroup delivery - setup a second delivery chain
2749                  * prevent delivery looping - only proceed
2750                  * if the message originated elsewhere and is a top-level post
2751                  */
2752                 if ($item['wall'] || $item['origin'] || ($item['id'] != $item['parent'])) {
2753                         return false;
2754                 }
2755
2756                 // now change this copy of the post to a forum head message and deliver to all the tgroup members
2757                 $self = DBA::selectFirst('contact', ['id', 'name', 'url', 'thumb'], ['uid' => $uid, 'self' => true]);
2758                 if (!DBA::isResult($self)) {
2759                         return false;
2760                 }
2761
2762                 $owner_id = Contact::getIdForURL($self['url']);
2763
2764                 // also reset all the privacy bits to the forum default permissions
2765
2766                 $private = ($user['allow_cid'] || $user['allow_gid'] || $user['deny_cid'] || $user['deny_gid']) ? self::PRIVATE : self::PUBLIC;
2767
2768                 $psid = PermissionSet::getIdFromACL(
2769                         $user['uid'],
2770                         $user['allow_cid'],
2771                         $user['allow_gid'],
2772                         $user['deny_cid'],
2773                         $user['deny_gid']
2774                 );
2775
2776                 $forum_mode = ($prvgroup ? 2 : 1);
2777
2778                 $fields = ['wall' => true, 'origin' => true, 'forum_mode' => $forum_mode, 'contact-id' => $self['id'],
2779                         'owner-id' => $owner_id, 'private' => $private, 'psid' => $psid];
2780                 self::update($fields, ['id' => $item_id]);
2781
2782                 self::updateThread($item_id);
2783
2784                 Worker::add(['priority' => PRIORITY_HIGH, 'dont_fork' => true], 'Notifier', Delivery::POST, $item_id);
2785
2786                 return false;
2787         }
2788
2789         public static function isRemoteSelf($contact, &$datarray)
2790         {
2791                 if (!$contact['remote_self']) {
2792                         return false;
2793                 }
2794
2795                 // Prevent the forwarding of posts that are forwarded
2796                 if (!empty($datarray["extid"]) && ($datarray["extid"] == Protocol::DFRN)) {
2797                         Logger::log('Already forwarded', Logger::DEBUG);
2798                         return false;
2799                 }
2800
2801                 // Prevent to forward already forwarded posts
2802                 if ($datarray["app"] == DI::baseUrl()->getHostname()) {
2803                         Logger::log('Already forwarded (second test)', Logger::DEBUG);
2804                         return false;
2805                 }
2806
2807                 // Only forward posts
2808                 if ($datarray["verb"] != Activity::POST) {
2809                         Logger::log('No post', Logger::DEBUG);
2810                         return false;
2811                 }
2812
2813                 if (($contact['network'] != Protocol::FEED) && ($datarray['private'] == self::PRIVATE)) {
2814                         Logger::log('Not public', Logger::DEBUG);
2815                         return false;
2816                 }
2817
2818                 $datarray2 = $datarray;
2819                 Logger::log('remote-self start - Contact '.$contact['url'].' - '.$contact['remote_self'].' Item '.print_r($datarray, true), Logger::DEBUG);
2820                 if ($contact['remote_self'] == 2) {
2821                         $self = DBA::selectFirst('contact', ['id', 'name', 'url', 'thumb'],
2822                                         ['uid' => $contact['uid'], 'self' => true]);
2823                         if (DBA::isResult($self)) {
2824                                 $datarray['contact-id'] = $self["id"];
2825
2826                                 $datarray['owner-name'] = $self["name"];
2827                                 $datarray['owner-link'] = $self["url"];
2828                                 $datarray['owner-avatar'] = $self["thumb"];
2829
2830                                 $datarray['author-name']   = $datarray['owner-name'];
2831                                 $datarray['author-link']   = $datarray['owner-link'];
2832                                 $datarray['author-avatar'] = $datarray['owner-avatar'];
2833
2834                                 unset($datarray['edited']);
2835
2836                                 unset($datarray['network']);
2837                                 unset($datarray['owner-id']);
2838                                 unset($datarray['author-id']);
2839                         }
2840
2841                         if ($contact['network'] != Protocol::FEED) {
2842                                 $datarray["guid"] = System::createUUID();
2843                                 unset($datarray["plink"]);
2844                                 $datarray["uri"] = self::newURI($contact['uid'], $datarray["guid"]);
2845                                 $datarray["parent-uri"] = $datarray["uri"];
2846                                 $datarray["thr-parent"] = $datarray["uri"];
2847                                 $datarray["extid"] = Protocol::DFRN;
2848                                 $urlpart = parse_url($datarray2['author-link']);
2849                                 $datarray["app"] = $urlpart["host"];
2850                         } else {
2851                                 $datarray['private'] = self::PUBLIC;
2852                         }
2853                 }
2854
2855                 if ($contact['network'] != Protocol::FEED) {
2856                         // Store the original post
2857                         $result = self::insert($datarray2, false, false);
2858                         Logger::log('remote-self post original item - Contact '.$contact['url'].' return '.$result.' Item '.print_r($datarray2, true), Logger::DEBUG);
2859                 } else {
2860                         $datarray["app"] = "Feed";
2861                         $result = true;
2862                 }
2863
2864                 // Trigger automatic reactions for addons
2865                 $datarray['api_source'] = true;
2866
2867                 // We have to tell the hooks who we are - this really should be improved
2868                 $_SESSION["authenticated"] = true;
2869                 $_SESSION["uid"] = $contact['uid'];
2870
2871                 return $result;
2872         }
2873
2874         /**
2875          *
2876          * @param string $s
2877          * @param int    $uid
2878          * @param array  $item
2879          * @param int    $cid
2880          * @return string
2881          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
2882          * @throws \ImagickException
2883          */
2884         public static function fixPrivatePhotos($s, $uid, $item = null, $cid = 0)
2885         {
2886                 if (DI::config()->get('system', 'disable_embedded')) {
2887                         return $s;
2888                 }
2889
2890                 Logger::log('check for photos', Logger::DEBUG);
2891                 $site = substr(DI::baseUrl(), strpos(DI::baseUrl(), '://'));
2892
2893                 $orig_body = $s;
2894                 $new_body = '';
2895
2896                 $img_start = strpos($orig_body, '[img');
2897                 $img_st_close = ($img_start !== false ? strpos(substr($orig_body, $img_start), ']') : false);
2898                 $img_len = ($img_start !== false ? strpos(substr($orig_body, $img_start + $img_st_close + 1), '[/img]') : false);
2899
2900                 while (($img_st_close !== false) && ($img_len !== false)) {
2901                         $img_st_close++; // make it point to AFTER the closing bracket
2902                         $image = substr($orig_body, $img_start + $img_st_close, $img_len);
2903
2904                         Logger::log('found photo ' . $image, Logger::DEBUG);
2905
2906                         if (stristr($image, $site . '/photo/')) {
2907                                 // Only embed locally hosted photos
2908                                 $replace = false;
2909                                 $i = basename($image);
2910                                 $i = str_replace(['.jpg', '.png', '.gif'], ['', '', ''], $i);
2911                                 $x = strpos($i, '-');
2912
2913                                 if ($x) {
2914                                         $res = substr($i, $x + 1);
2915                                         $i = substr($i, 0, $x);
2916                                         $photo = Photo::getPhotoForUser($uid, $i, $res);
2917                                         if (DBA::isResult($photo)) {
2918                                                 /*
2919                                                  * Check to see if we should replace this photo link with an embedded image
2920                                                  * 1. No need to do so if the photo is public
2921                                                  * 2. If there's a contact-id provided, see if they're in the access list
2922                                                  *    for the photo. If so, embed it.
2923                                                  * 3. Otherwise, if we have an item, see if the item permissions match the photo
2924                                                  *    permissions, regardless of order but first check to see if they're an exact
2925                                                  *    match to save some processing overhead.
2926                                                  */
2927                                                 if (self::hasPermissions($photo)) {
2928                                                         if ($cid) {
2929                                                                 $recips = self::enumeratePermissions($photo);
2930                                                                 if (in_array($cid, $recips)) {
2931                                                                         $replace = true;
2932                                                                 }
2933                                                         } elseif ($item) {
2934                                                                 if (self::samePermissions($uid, $item, $photo)) {
2935                                                                         $replace = true;
2936                                                                 }
2937                                                         }
2938                                                 }
2939                                                 if ($replace) {
2940                                                         $photo_img = Photo::getImageForPhoto($photo);
2941                                                         // If a custom width and height were specified, apply before embedding
2942                                                         if (preg_match("/\[img\=([0-9]*)x([0-9]*)\]/is", substr($orig_body, $img_start, $img_st_close), $match)) {
2943                                                                 Logger::log('scaling photo', Logger::DEBUG);
2944
2945                                                                 $width = intval($match[1]);
2946                                                                 $height = intval($match[2]);
2947
2948                                                                 $photo_img->scaleDown(max($width, $height));
2949                                                         }
2950
2951                                                         $data = $photo_img->asString();
2952                                                         $type = $photo_img->getType();
2953
2954                                                         Logger::log('replacing photo', Logger::DEBUG);
2955                                                         $image = 'data:' . $type . ';base64,' . base64_encode($data);
2956                                                         Logger::log('replaced: ' . $image, Logger::DATA);
2957                                                 }
2958                                         }
2959                                 }
2960                         }
2961
2962                         $new_body = $new_body . substr($orig_body, 0, $img_start + $img_st_close) . $image . '[/img]';
2963                         $orig_body = substr($orig_body, $img_start + $img_st_close + $img_len + strlen('[/img]'));
2964                         if ($orig_body === false) {
2965                                 $orig_body = '';
2966                         }
2967
2968                         $img_start = strpos($orig_body, '[img');
2969                         $img_st_close = ($img_start !== false ? strpos(substr($orig_body, $img_start), ']') : false);
2970                         $img_len = ($img_start !== false ? strpos(substr($orig_body, $img_start + $img_st_close + 1), '[/img]') : false);
2971                 }
2972
2973                 $new_body = $new_body . $orig_body;
2974
2975                 return $new_body;
2976         }
2977
2978         private static function hasPermissions($obj)
2979         {
2980                 return !empty($obj['allow_cid']) || !empty($obj['allow_gid']) ||
2981                         !empty($obj['deny_cid']) || !empty($obj['deny_gid']);
2982         }
2983
2984         private static function samePermissions($uid, $obj1, $obj2)
2985         {
2986                 // first part is easy. Check that these are exactly the same.
2987                 if (($obj1['allow_cid'] == $obj2['allow_cid'])
2988                         && ($obj1['allow_gid'] == $obj2['allow_gid'])
2989                         && ($obj1['deny_cid'] == $obj2['deny_cid'])
2990                         && ($obj1['deny_gid'] == $obj2['deny_gid'])) {
2991                         return true;
2992                 }
2993
2994                 // This is harder. Parse all the permissions and compare the resulting set.
2995                 $recipients1 = self::enumeratePermissions($obj1);
2996                 $recipients2 = self::enumeratePermissions($obj2);
2997                 sort($recipients1);
2998                 sort($recipients2);
2999
3000                 /// @TODO Comparison of arrays, maybe use array_diff_assoc() here?
3001                 return ($recipients1 == $recipients2);
3002         }
3003
3004         /**
3005          * Returns an array of contact-ids that are allowed to see this object
3006          *
3007          * @param array $obj        Item array with at least uid, allow_cid, allow_gid, deny_cid and deny_gid
3008          * @param bool  $check_dead Prunes unavailable contacts from the result
3009          * @return array
3010          * @throws \Exception
3011          */
3012         public static function enumeratePermissions(array $obj, bool $check_dead = false)
3013         {
3014                 $aclFormater = DI::aclFormatter();
3015
3016                 $allow_people = $aclFormater->expand($obj['allow_cid']);
3017                 $allow_groups = Group::expand($obj['uid'], $aclFormater->expand($obj['allow_gid']), $check_dead);
3018                 $deny_people  = $aclFormater->expand($obj['deny_cid']);
3019                 $deny_groups  = Group::expand($obj['uid'], $aclFormater->expand($obj['deny_gid']), $check_dead);
3020                 $recipients   = array_unique(array_merge($allow_people, $allow_groups));
3021                 $deny         = array_unique(array_merge($deny_people, $deny_groups));
3022                 $recipients   = array_diff($recipients, $deny);
3023                 return $recipients;
3024         }
3025
3026         public static function getFeedTags($item)
3027         {
3028                 $ret = [];
3029                 $matches = false;
3030                 $cnt = preg_match_all('|\#\[url\=(.*?)\](.*?)\[\/url\]|', $item['tag'], $matches);
3031                 if ($cnt) {
3032                         for ($x = 0; $x < $cnt; $x ++) {
3033                                 if ($matches[1][$x]) {
3034                                         $ret[$matches[2][$x]] = ['#', $matches[1][$x], $matches[2][$x]];
3035                                 }
3036                         }
3037                 }
3038                 $matches = false;
3039                 $cnt = preg_match_all('|\@\[url\=(.*?)\](.*?)\[\/url\]|', $item['tag'], $matches);
3040                 if ($cnt) {
3041                         for ($x = 0; $x < $cnt; $x ++) {
3042                                 if ($matches[1][$x]) {
3043                                         $ret[] = ['@', $matches[1][$x], $matches[2][$x]];
3044                                 }
3045                         }
3046                 }
3047                 return $ret;
3048         }
3049
3050         public static function expire($uid, $days, $network = "", $force = false)
3051         {
3052                 if (!$uid || ($days < 1)) {
3053                         return;
3054                 }
3055
3056                 $condition = ["`uid` = ? AND NOT `deleted` AND `id` = `parent` AND `gravity` = ?",
3057                         $uid, GRAVITY_PARENT];
3058
3059                 /*
3060                  * $expire_network_only = save your own wall posts
3061                  * and just expire conversations started by others
3062                  */
3063                 $expire_network_only = DI::pConfig()->get($uid, 'expire', 'network_only', false);
3064
3065                 if ($expire_network_only) {
3066                         $condition[0] .= " AND NOT `wall`";
3067                 }
3068
3069                 if ($network != "") {
3070                         $condition[0] .= " AND `network` = ?";
3071                         $condition[] = $network;
3072                 }
3073
3074                 $condition[0] .= " AND `received` < UTC_TIMESTAMP() - INTERVAL ? DAY";
3075                 $condition[] = $days;
3076
3077                 $items = self::select(['file', 'resource-id', 'starred', 'type', 'id', 'post-type'], $condition);
3078
3079                 if (!DBA::isResult($items)) {
3080                         return;
3081                 }
3082
3083                 $expire_items = DI::pConfig()->get($uid, 'expire', 'items', true);
3084
3085                 // Forcing expiring of items - but not notes and marked items
3086                 if ($force) {
3087                         $expire_items = true;
3088                 }
3089
3090                 $expire_notes = DI::pConfig()->get($uid, 'expire', 'notes', true);
3091                 $expire_starred = DI::pConfig()->get($uid, 'expire', 'starred', true);
3092                 $expire_photos = DI::pConfig()->get($uid, 'expire', 'photos', false);
3093
3094                 $expired = 0;
3095
3096                 while ($item = Item::fetch($items)) {
3097                         // don't expire filed items
3098
3099                         if (strpos($item['file'], '[') !== false) {
3100                                 continue;
3101                         }
3102
3103                         // Only expire posts, not photos and photo comments
3104
3105                         if (!$expire_photos && strlen($item['resource-id'])) {
3106                                 continue;
3107                         } elseif (!$expire_starred && intval($item['starred'])) {
3108                                 continue;
3109                         } elseif (!$expire_notes && (($item['type'] == 'note') || ($item['post-type'] == Item::PT_PERSONAL_NOTE))) {
3110                                 continue;
3111                         } elseif (!$expire_items && ($item['type'] != 'note') && ($item['post-type'] != Item::PT_PERSONAL_NOTE)) {
3112                                 continue;
3113                         }
3114
3115                         self::markForDeletionById($item['id'], PRIORITY_LOW);
3116
3117                         ++$expired;
3118                 }
3119                 DBA::close($items);
3120                 Logger::log('User ' . $uid . ": expired $expired items; expire items: $expire_items, expire notes: $expire_notes, expire starred: $expire_starred, expire photos: $expire_photos");
3121         }
3122
3123         public static function firstPostDate($uid, $wall = false)
3124         {
3125                 $condition = ['uid' => $uid, 'wall' => $wall, 'deleted' => false, 'visible' => true, 'moderated' => false];
3126                 $params = ['order' => ['received' => false]];
3127                 $thread = DBA::selectFirst('thread', ['received'], $condition, $params);
3128                 if (DBA::isResult($thread)) {
3129                         return substr(DateTimeFormat::local($thread['received']), 0, 10);
3130                 }
3131                 return false;
3132         }
3133
3134         /**
3135          * add/remove activity to an item
3136          *
3137          * Toggle activities as like,dislike,attend of an item
3138          *
3139          * @param string $item_id
3140          * @param string $verb
3141          *            Activity verb. One of
3142          *            like, unlike, dislike, undislike, attendyes, unattendyes,
3143          *            attendno, unattendno, attendmaybe, unattendmaybe
3144          * @return bool
3145          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
3146          * @throws \ImagickException
3147          * @hook  'post_local_end'
3148          *            array $arr
3149          *            'post_id' => ID of posted item
3150          */
3151         public static function performActivity($item_id, $verb)
3152         {
3153                 if (!Session::isAuthenticated()) {
3154                         return false;
3155                 }
3156
3157                 switch ($verb) {
3158                         case 'like':
3159                         case 'unlike':
3160                                 $activity = Activity::LIKE;
3161                                 break;
3162                         case 'dislike':
3163                         case 'undislike':
3164                                 $activity = Activity::DISLIKE;
3165                                 break;
3166                         case 'attendyes':
3167                         case 'unattendyes':
3168                                 $activity = Activity::ATTEND;
3169                                 break;
3170                         case 'attendno':
3171                         case 'unattendno':
3172                                 $activity = Activity::ATTENDNO;
3173                                 break;
3174                         case 'attendmaybe':
3175                         case 'unattendmaybe':
3176                                 $activity = Activity::ATTENDMAYBE;
3177                                 break;
3178                         case 'follow':
3179                         case 'unfollow':
3180                                 $activity = Activity::FOLLOW;
3181                                 break;
3182                         default:
3183                                 Logger::log('like: unknown verb ' . $verb . ' for item ' . $item_id);
3184                                 return false;
3185                 }
3186
3187                 // Enable activity toggling instead of on/off
3188                 $event_verb_flag = $activity === Activity::ATTEND || $activity === Activity::ATTENDNO || $activity === Activity::ATTENDMAYBE;
3189
3190                 Logger::log('like: verb ' . $verb . ' item ' . $item_id);
3191
3192                 $item = self::selectFirst(self::ITEM_FIELDLIST, ['`id` = ? OR `uri` = ?', $item_id, $item_id]);
3193                 if (!DBA::isResult($item)) {
3194                         Logger::log('like: unknown item ' . $item_id);
3195                         return false;
3196                 }
3197
3198                 $item_uri = $item['uri'];
3199
3200                 $uid = $item['uid'];
3201                 if (($uid == 0) && local_user()) {
3202                         $uid = local_user();
3203                 }
3204
3205                 if (!Security::canWriteToUserWall($uid)) {
3206                         Logger::log('like: unable to write on wall ' . $uid);
3207                         return false;
3208                 }
3209
3210                 // Retrieves the local post owner
3211                 $owner_self_contact = DBA::selectFirst('contact', [], ['uid' => $uid, 'self' => true]);
3212                 if (!DBA::isResult($owner_self_contact)) {
3213                         Logger::log('like: unknown owner ' . $uid);
3214                         return false;
3215                 }
3216
3217                 // Retrieve the current logged in user's public contact
3218                 $author_id = public_contact();
3219
3220                 $author_contact = DBA::selectFirst('contact', ['url'], ['id' => $author_id]);
3221                 if (!DBA::isResult($author_contact)) {
3222                         Logger::log('like: unknown author ' . $author_id);
3223                         return false;
3224                 }
3225
3226                 // Contact-id is the uid-dependant author contact
3227                 if (local_user() == $uid) {
3228                         $item_contact_id = $owner_self_contact['id'];
3229                 } else {
3230                         $item_contact_id = Contact::getIdForURL($author_contact['url'], $uid, true);
3231                         $item_contact = DBA::selectFirst('contact', [], ['id' => $item_contact_id]);
3232                         if (!DBA::isResult($item_contact)) {
3233                                 Logger::log('like: unknown item contact ' . $item_contact_id);
3234                                 return false;
3235                         }
3236                 }
3237
3238                 // Look for an existing verb row
3239                 // event participation are essentially radio toggles. If you make a subsequent choice,
3240                 // we need to eradicate your first choice.
3241                 if ($event_verb_flag) {
3242                         $verbs = [Activity::ATTEND, Activity::ATTENDNO, Activity::ATTENDMAYBE];
3243
3244                         // Translate to the index based activity index
3245                         $activities = [];
3246                         foreach ($verbs as $verb) {
3247                                 $activities[] = self::activityToIndex($verb);
3248                         }
3249                 } else {
3250                         $activities = self::activityToIndex($activity);
3251                 }
3252
3253                 $condition = ['activity' => $activities, 'deleted' => false, 'gravity' => GRAVITY_ACTIVITY,
3254                         'author-id' => $author_id, 'uid' => $item['uid'], 'thr-parent' => $item_uri];
3255
3256                 $like_item = self::selectFirst(['id', 'guid', 'verb'], $condition);
3257
3258                 // If it exists, mark it as deleted
3259                 if (DBA::isResult($like_item)) {
3260                         self::markForDeletionById($like_item['id']);
3261
3262                         if (!$event_verb_flag || $like_item['verb'] == $activity) {
3263                                 return true;
3264                         }
3265                 }
3266
3267                 // Verb is "un-something", just trying to delete existing entries
3268                 if (strpos($verb, 'un') === 0) {
3269                         return true;
3270                 }
3271
3272                 $objtype = $item['resource-id'] ? Activity\ObjectType::IMAGE : Activity\ObjectType::NOTE;
3273
3274                 $new_item = [
3275                         'guid'          => System::createUUID(),
3276                         'uri'           => self::newURI($item['uid']),
3277                         'uid'           => $item['uid'],
3278                         'contact-id'    => $item_contact_id,
3279                         'wall'          => $item['wall'],
3280                         'origin'        => 1,
3281                         'network'       => Protocol::DFRN,
3282                         'gravity'       => GRAVITY_ACTIVITY,
3283                         'parent'        => $item['id'],
3284                         'parent-uri'    => $item['uri'],
3285                         'thr-parent'    => $item['uri'],
3286                         'owner-id'      => $author_id,
3287                         'author-id'     => $author_id,
3288                         'body'          => $activity,
3289                         'verb'          => $activity,
3290                         'object-type'   => $objtype,
3291                         'allow_cid'     => $item['allow_cid'],
3292                         'allow_gid'     => $item['allow_gid'],
3293                         'deny_cid'      => $item['deny_cid'],
3294                         'deny_gid'      => $item['deny_gid'],
3295                         'visible'       => 1,
3296                         'unseen'        => 1,
3297                 ];
3298
3299                 $signed = Diaspora::createLikeSignature($uid, $new_item);
3300                 if (!empty($signed)) {
3301                         $new_item['diaspora_signed_text'] = json_encode($signed);
3302                 }
3303
3304                 $new_item_id = self::insert($new_item);
3305
3306                 // If the parent item isn't visible then set it to visible
3307                 if (!$item['visible']) {
3308                         self::update(['visible' => true], ['id' => $item['id']]);
3309                 }
3310
3311                 $new_item['id'] = $new_item_id;
3312
3313                 Hook::callAll('post_local_end', $new_item);
3314
3315                 return true;
3316         }
3317
3318         private static function addThread($itemid, $onlyshadow = false)
3319         {
3320                 $fields = ['uid', 'created', 'edited', 'commented', 'received', 'changed', 'wall', 'private', 'pubmail',
3321                         'moderated', 'visible', 'starred', 'contact-id', 'post-type',
3322                         'deleted', 'origin', 'forum_mode', 'mention', 'network', 'author-id', 'owner-id'];
3323                 $condition = ["`id` = ? AND (`parent` = ? OR `parent` = 0)", $itemid, $itemid];
3324                 $item = self::selectFirst($fields, $condition);
3325
3326                 if (!DBA::isResult($item)) {
3327                         return;
3328                 }
3329
3330                 $item['iid'] = $itemid;
3331
3332                 if (!$onlyshadow) {
3333                         $result = DBA::insert('thread', $item);
3334
3335                         Logger::log("Add thread for item ".$itemid." - ".print_r($result, true), Logger::DEBUG);
3336                 }
3337         }
3338
3339         private static function updateThread($itemid, $setmention = false)
3340         {
3341                 $fields = ['uid', 'guid', 'created', 'edited', 'commented', 'received', 'changed', 'post-type',
3342                         'wall', 'private', 'pubmail', 'moderated', 'visible', 'starred', 'contact-id',
3343                         'deleted', 'origin', 'forum_mode', 'network', 'author-id', 'owner-id'];
3344                 $condition = ["`id` = ? AND (`parent` = ? OR `parent` = 0)", $itemid, $itemid];
3345
3346                 $item = self::selectFirst($fields, $condition);
3347                 if (!DBA::isResult($item)) {
3348                         return;
3349                 }
3350
3351                 if ($setmention) {
3352                         $item["mention"] = 1;
3353                 }
3354
3355                 $fields = [];
3356
3357                 foreach ($item as $field => $data) {
3358                         if (!in_array($field, ["guid"])) {
3359                                 $fields[$field] = $data;
3360                         }
3361                 }
3362
3363                 $result = DBA::update('thread', $fields, ['iid' => $itemid]);
3364
3365                 Logger::log("Update thread for item ".$itemid." - guid ".$item["guid"]." - ".(int)$result, Logger::DEBUG);
3366         }
3367
3368         private static function deleteThread($itemid, $itemuri = "")
3369         {
3370                 $item = DBA::selectFirst('thread', ['uid'], ['iid' => $itemid]);
3371                 if (!DBA::isResult($item)) {
3372                         Logger::log('No thread found for id '.$itemid, Logger::DEBUG);
3373                         return;
3374                 }
3375
3376                 $result = DBA::delete('thread', ['iid' => $itemid], ['cascade' => false]);
3377
3378                 Logger::log("deleteThread: Deleted thread for item ".$itemid." - ".print_r($result, true), Logger::DEBUG);
3379
3380                 if ($itemuri != "") {
3381                         $condition = ["`uri` = ? AND NOT `deleted` AND NOT (`uid` IN (?, 0))", $itemuri, $item["uid"]];
3382                         if (!self::exists($condition)) {
3383                                 DBA::delete('item', ['uri' => $itemuri, 'uid' => 0]);
3384                                 Logger::debug('Deleted shadow item', ['id' => $itemid, 'uri' => $itemuri]);
3385                         }
3386                 }
3387         }
3388
3389         public static function getPermissionsSQLByUserId($owner_id)
3390         {
3391                 $local_user = local_user();
3392                 $remote_user = Session::getRemoteContactID($owner_id);
3393
3394                 /*
3395                  * Construct permissions
3396                  *
3397                  * default permissions - anonymous user
3398                  */
3399                 $sql = sprintf(" AND `item`.`private` != %d", self::PRIVATE);
3400
3401                 // Profile owner - everything is visible
3402                 if ($local_user && ($local_user == $owner_id)) {
3403                         $sql = '';
3404                 } elseif ($remote_user) {
3405                         /*
3406                          * Authenticated visitor. Unless pre-verified,
3407                          * check that the contact belongs to this $owner_id
3408                          * and load the groups the visitor belongs to.
3409                          * If pre-verified, the caller is expected to have already
3410                          * done this and passed the groups into this function.
3411                          */
3412                         $set = PermissionSet::get($owner_id, $remote_user);
3413
3414                         if (!empty($set)) {
3415                                 $sql_set = sprintf(" OR (`item`.`private` = %d AND `item`.`wall` AND `item`.`psid` IN (", self::PRIVATE) . implode(',', $set) . "))";
3416                         } else {
3417                                 $sql_set = '';
3418                         }
3419
3420                         $sql = sprintf(" AND (`item`.`private` != %d", self::PRIVATE) . $sql_set . ")";
3421                 }
3422
3423                 return $sql;
3424         }
3425
3426         /**
3427          * get translated item type
3428          *
3429          * @param $item
3430          * @return string
3431          */
3432         public static function postType($item)
3433         {
3434                 if (!empty($item['event-id'])) {
3435                         return DI::l10n()->t('event');
3436                 } elseif (!empty($item['resource-id'])) {
3437                         return DI::l10n()->t('photo');
3438                 } elseif (!empty($item['verb']) && $item['verb'] !== Activity::POST) {
3439                         return DI::l10n()->t('activity');
3440                 } elseif ($item['id'] != $item['parent']) {
3441                         return DI::l10n()->t('comment');
3442                 }
3443
3444                 return DI::l10n()->t('post');
3445         }
3446
3447         /**
3448          * Sets the "rendered-html" field of the provided item
3449          *
3450          * Body is preserved to avoid side-effects as we modify it just-in-time for spoilers and private image links
3451          *
3452          * @param array $item
3453          * @param bool  $update
3454          *
3455          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
3456          * @todo Remove reference, simply return "rendered-html" and "rendered-hash"
3457          */
3458         public static function putInCache(&$item, $update = false)
3459         {
3460                 $body = $item["body"];
3461
3462                 $rendered_hash = $item['rendered-hash'] ?? '';
3463                 $rendered_html = $item['rendered-html'] ?? '';
3464
3465                 if ($rendered_hash == ''
3466                         || $rendered_html == ""
3467                         || $rendered_hash != hash("md5", $item["body"])
3468                         || DI::config()->get("system", "ignore_cache")
3469                 ) {
3470                         self::addRedirToImageTags($item);
3471
3472                         $item["rendered-html"] = BBCode::convert($item["body"]);
3473                         $item["rendered-hash"] = hash("md5", $item["body"]);
3474
3475                         $hook_data = ['item' => $item, 'rendered-html' => $item['rendered-html'], 'rendered-hash' => $item['rendered-hash']];
3476                         Hook::callAll('put_item_in_cache', $hook_data);
3477                         $item['rendered-html'] = $hook_data['rendered-html'];
3478                         $item['rendered-hash'] = $hook_data['rendered-hash'];
3479                         unset($hook_data);
3480
3481                         // Force an update if the generated values differ from the existing ones
3482                         if ($rendered_hash != $item["rendered-hash"]) {
3483                                 $update = true;
3484                         }
3485
3486                         // Only compare the HTML when we forcefully ignore the cache
3487                         if (DI::config()->get("system", "ignore_cache") && ($rendered_html != $item["rendered-html"])) {
3488                                 $update = true;
3489                         }
3490
3491                         if ($update && !empty($item["id"])) {
3492                                 self::update(
3493                                         [
3494                                                 'rendered-html' => $item["rendered-html"],
3495                                                 'rendered-hash' => $item["rendered-hash"]
3496                                         ],
3497                                         ['id' => $item["id"]]
3498                                 );
3499                         }
3500                 }
3501
3502                 $item["body"] = $body;
3503         }
3504
3505         /**
3506          * Find any non-embedded images in private items and add redir links to them
3507          *
3508          * @param array &$item The field array of an item row
3509          */
3510         private static function addRedirToImageTags(array &$item)
3511         {
3512                 $app = DI::app();
3513
3514                 $matches = [];
3515                 $cnt = preg_match_all('|\[img\](http[^\[]*?/photo/[a-fA-F0-9]+?(-[0-9]\.[\w]+?)?)\[\/img\]|', $item['body'], $matches, PREG_SET_ORDER);
3516                 if ($cnt) {
3517                         foreach ($matches as $mtch) {
3518                                 if (strpos($mtch[1], '/redir') !== false) {
3519                                         continue;
3520                                 }
3521
3522                                 if ((local_user() == $item['uid']) && ($item['private'] == self::PRIVATE) && ($item['contact-id'] != $app->contact['id']) && ($item['network'] == Protocol::DFRN)) {
3523                                         $img_url = 'redir/' . $item['contact-id'] . '?url=' . urlencode($mtch[1]);
3524                                         $item['body'] = str_replace($mtch[0], '[img]' . $img_url . '[/img]', $item['body']);
3525                                 }
3526                         }
3527                 }
3528         }
3529
3530         /**
3531          * Given an item array, convert the body element from bbcode to html and add smilie icons.
3532          * If attach is true, also add icons for item attachments.
3533          *
3534          * @param array   $item
3535          * @param boolean $attach
3536          * @param boolean $is_preview
3537          * @return string item body html
3538          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
3539          * @throws \ImagickException
3540          * @hook  prepare_body_init item array before any work
3541          * @hook  prepare_body_content_filter ('item'=>item array, 'filter_reasons'=>string array) before first bbcode to html
3542          * @hook  prepare_body ('item'=>item array, 'html'=>body string, 'is_preview'=>boolean, 'filter_reasons'=>string array) after first bbcode to html
3543          * @hook  prepare_body_final ('item'=>item array, 'html'=>body string) after attach icons and blockquote special case handling (spoiler, author)
3544          */
3545         public static function prepareBody(array &$item, $attach = false, $is_preview = false)
3546         {
3547                 $a = DI::app();
3548                 Hook::callAll('prepare_body_init', $item);
3549
3550                 // In order to provide theme developers more possibilities, event items
3551                 // are treated differently.
3552                 if ($item['object-type'] === Activity\ObjectType::EVENT && isset($item['event-id'])) {
3553                         $ev = Event::getItemHTML($item);
3554                         return $ev;
3555                 }
3556
3557                 $tags = Term::populateTagsFromItem($item);
3558
3559                 $item['tags'] = $tags['tags'];
3560                 $item['hashtags'] = $tags['hashtags'];
3561                 $item['mentions'] = $tags['mentions'];
3562
3563                 // Compile eventual content filter reasons
3564                 $filter_reasons = [];
3565                 if (!$is_preview && public_contact() != $item['author-id']) {
3566                         if (!empty($item['content-warning']) && (!local_user() || !DI::pConfig()->get(local_user(), 'system', 'disable_cw', false))) {
3567                                 $filter_reasons[] = DI::l10n()->t('Content warning: %s', $item['content-warning']);
3568                         }
3569
3570                         $hook_data = [
3571                                 'item' => $item,
3572                                 'filter_reasons' => $filter_reasons
3573                         ];
3574                         Hook::callAll('prepare_body_content_filter', $hook_data);
3575                         $filter_reasons = $hook_data['filter_reasons'];
3576                         unset($hook_data);
3577                 }
3578
3579                 // Update the cached values if there is no "zrl=..." on the links.
3580                 $update = (!Session::isAuthenticated() && ($item["uid"] == 0));
3581
3582                 // Or update it if the current viewer is the intented viewer.
3583                 if (($item["uid"] == local_user()) && ($item["uid"] != 0)) {
3584                         $update = true;
3585                 }
3586
3587                 self::putInCache($item, $update);
3588                 $s = $item["rendered-html"];
3589
3590                 $hook_data = [
3591                         'item' => $item,
3592                         'html' => $s,
3593                         'preview' => $is_preview,
3594                         'filter_reasons' => $filter_reasons
3595                 ];
3596                 Hook::callAll('prepare_body', $hook_data);
3597                 $s = $hook_data['html'];
3598                 unset($hook_data);
3599
3600                 if (!$attach) {
3601                         // Replace the blockquotes with quotes that are used in mails.
3602                         $mailquote = '<blockquote type="cite" class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">';
3603                         $s = str_replace(['<blockquote>', '<blockquote class="spoiler">', '<blockquote class="author">'], [$mailquote, $mailquote, $mailquote], $s);
3604                         return $s;
3605                 }
3606
3607                 $as = '';
3608                 $vhead = false;
3609                 $matches = [];
3610                 preg_match_all('|\[attach\]href=\"(.*?)\" length=\"(.*?)\" type=\"(.*?)\"(?: title=\"(.*?)\")?|', $item['attach'], $matches, PREG_SET_ORDER);
3611                 foreach ($matches as $mtch) {
3612                         $mime = $mtch[3];
3613
3614                         $the_url = Contact::magicLinkById($item['author-id'], $mtch[1]);
3615
3616                         if (strpos($mime, 'video') !== false) {
3617                                 if (!$vhead) {
3618                                         $vhead = true;
3619                                         DI::page()['htmlhead'] .= Renderer::replaceMacros(Renderer::getMarkupTemplate('videos_head.tpl'));
3620                                 }
3621
3622                                 $url_parts = explode('/', $the_url);
3623                                 $id = end($url_parts);
3624                                 $as .= Renderer::replaceMacros(Renderer::getMarkupTemplate('video_top.tpl'), [
3625                                         '$video' => [
3626                                                 'id'     => $id,
3627                                                 'title'  => DI::l10n()->t('View Video'),
3628                                                 'src'    => $the_url,
3629                                                 'mime'   => $mime,
3630                                         ],
3631                                 ]);
3632                         }
3633
3634                         $filetype = strtolower(substr($mime, 0, strpos($mime, '/')));
3635                         if ($filetype) {
3636                                 $filesubtype = strtolower(substr($mime, strpos($mime, '/') + 1));
3637                                 $filesubtype = str_replace('.', '-', $filesubtype);
3638                         } else {
3639                                 $filetype = 'unkn';
3640                                 $filesubtype = 'unkn';
3641                         }
3642
3643                         $title = Strings::escapeHtml(trim(($mtch[4] ?? '') ?: $mtch[1]));
3644                         $title .= ' ' . $mtch[2] . ' ' . DI::l10n()->t('bytes');
3645
3646                         $icon = '<div class="attachtype icon s22 type-' . $filetype . ' subtype-' . $filesubtype . '"></div>';
3647                         $as .= '<a href="' . strip_tags($the_url) . '" title="' . $title . '" class="attachlink" target="_blank" rel="noopener noreferrer" >' . $icon . '</a>';
3648                 }
3649
3650                 if ($as != '') {
3651                         $s .= '<div class="body-attach">'.$as.'<div class="clear"></div></div>';
3652                 }
3653
3654                 // Map.
3655                 if (strpos($s, '<div class="map">') !== false && !empty($item['coord'])) {
3656                         $x = Map::byCoordinates(trim($item['coord']));
3657                         if ($x) {
3658                                 $s = preg_replace('/\<div class\=\"map\"\>/', '$0' . $x, $s);
3659                         }
3660                 }
3661
3662                 // Replace friendica image url size with theme preference.
3663                 if (!empty($a->theme_info['item_image_size'])) {
3664                         $ps = $a->theme_info['item_image_size'];
3665                         $s = preg_replace('|(<img[^>]+src="[^"]+/photo/[0-9a-f]+)-[0-9]|', "$1-" . $ps, $s);
3666                 }
3667
3668                 $s = HTML::applyContentFilter($s, $filter_reasons);
3669
3670                 $hook_data = ['item' => $item, 'html' => $s];
3671                 Hook::callAll('prepare_body_final', $hook_data);
3672
3673                 return $hook_data['html'];
3674         }
3675
3676         /**
3677          * get private link for item
3678          *
3679          * @param array $item
3680          * @return boolean|array False if item has not plink, otherwise array('href'=>plink url, 'title'=>translated title)
3681          * @throws \Exception
3682          */
3683         public static function getPlink($item)
3684         {
3685                 $a = DI::app();
3686
3687                 if ($a->user['nickname'] != "") {
3688                         $ret = [
3689                                 'href' => "display/" . $item['guid'],
3690                                 'orig' => "display/" . $item['guid'],
3691                                 'title' => DI::l10n()->t('View on separate page'),
3692                                 'orig_title' => DI::l10n()->t('view on separate page'),
3693                         ];
3694
3695                         if (!empty($item['plink'])) {
3696                                 $ret["href"] = DI::baseUrl()->remove($item['plink']);
3697                                 $ret["title"] = DI::l10n()->t('link to source');
3698                         }
3699
3700                 } elseif (!empty($item['plink']) && ($item['private'] != self::PRIVATE)) {
3701                         $ret = [
3702                                 'href' => $item['plink'],
3703                                 'orig' => $item['plink'],
3704                                 'title' => DI::l10n()->t('link to source'),
3705                         ];
3706                 } else {
3707                         $ret = [];
3708                 }
3709
3710                 return $ret;
3711         }
3712
3713         /**
3714          * Is the given item array a post that is sent as starting post to a forum?
3715          *
3716          * @param array $item
3717          * @param array $owner
3718          *
3719          * @return boolean "true" when it is a forum post
3720          */
3721         public static function isForumPost(array $item, array $owner = [])
3722         {
3723                 if (empty($owner)) {
3724                         $owner = User::getOwnerDataById($item['uid']);
3725                         if (empty($owner)) {
3726                                 return false;
3727                         }
3728                 }
3729
3730                 if (($item['author-id'] == $item['owner-id']) ||
3731                         ($owner['id'] == $item['contact-id']) ||
3732                         ($item['uri'] != $item['parent-uri']) ||
3733                         $item['origin']) {
3734                         return false;
3735                 }
3736
3737                 return Contact::isForum($item['contact-id']);
3738         }
3739
3740         /**
3741          * Search item id for given URI or plink
3742          *
3743          * @param string $uri
3744          * @param integer $uid
3745          *
3746          * @return integer item id
3747          */
3748         public static function searchByLink($uri, $uid = 0)
3749         {
3750                 $ssl_uri = str_replace('http://', 'https://', $uri);
3751                 $uris = [$uri, $ssl_uri, Strings::normaliseLink($uri)];
3752
3753                 $item = DBA::selectFirst('item', ['id'], ['uri' => $uris, 'uid' => $uid]);
3754                 if (DBA::isResult($item)) {
3755                         return $item['id'];
3756                 }
3757
3758                 $itemcontent = DBA::selectFirst('item-content', ['uri-id'], ['plink' => $uris]);
3759                 if (!DBA::isResult($itemcontent)) {
3760                         return 0;
3761                 }
3762
3763                 $itemuri = DBA::selectFirst('item-uri', ['uri'], ['id' => $itemcontent['uri-id']]);
3764                 if (!DBA::isResult($itemuri)) {
3765                         return 0;
3766                 }
3767
3768                 $item = DBA::selectFirst('item', ['id'], ['uri' => $itemuri['uri'], 'uid' => $uid]);
3769                 if (DBA::isResult($item)) {
3770                         return $item['id'];
3771                 }
3772
3773                 return 0;
3774         }
3775
3776         /**
3777          * Return the URI for a link to the post
3778          *
3779          * @param string $uri URI or link to post
3780          *
3781          * @return string URI
3782          */
3783         public static function getURIByLink(string $uri)
3784         {
3785                 $ssl_uri = str_replace('http://', 'https://', $uri);
3786                 $uris = [$uri, $ssl_uri, Strings::normaliseLink($uri)];
3787
3788                 $item = DBA::selectFirst('item', ['uri'], ['uri' => $uris]);
3789                 if (DBA::isResult($item)) {
3790                         return $item['uri'];
3791                 }
3792
3793                 $itemcontent = DBA::selectFirst('item-content', ['uri-id'], ['plink' => $uris]);
3794                 if (!DBA::isResult($itemcontent)) {
3795                         return '';
3796                 }
3797
3798                 $itemuri = DBA::selectFirst('item-uri', ['uri'], ['id' => $itemcontent['uri-id']]);
3799                 if (DBA::isResult($itemuri)) {
3800                         return $itemuri['uri'];
3801                 }
3802
3803                 return '';
3804         }
3805
3806         /**
3807          * Fetches item for given URI or plink
3808          *
3809          * @param string $uri
3810          * @param integer $uid
3811          *
3812          * @return integer item id
3813          */
3814         public static function fetchByLink($uri, $uid = 0)
3815         {
3816                 $item_id = self::searchByLink($uri, $uid);
3817                 if (!empty($item_id)) {
3818                         return $item_id;
3819                 }
3820
3821                 if ($fetched_uri = ActivityPub\Processor::fetchMissingActivity($uri)) {
3822                         $item_id = self::searchByLink($fetched_uri, $uid);
3823                 } else {
3824                         $item_id = Diaspora::fetchByURL($uri);
3825                 }
3826
3827                 if (!empty($item_id)) {
3828                         return $item_id;
3829                 }
3830
3831                 return 0;
3832         }
3833
3834         /**
3835          * Return share data from an item array (if the item is shared item)
3836          * We are providing the complete Item array, because at some time in the future
3837          * we hopefully will define these values not in the body anymore but in some item fields.
3838          * This function is meant to replace all similar functions in the system.
3839          *
3840          * @param array $item
3841          *
3842          * @return array with share information
3843          */
3844         public static function getShareArray($item)
3845         {
3846                 if (!preg_match("/(.*?)\[share(.*?)\]\s?(.*?)\s?\[\/share\]\s?/ism", $item['body'], $matches)) {
3847                         return [];
3848                 }
3849
3850                 $attribute_string = $matches[2];
3851                 $attributes = ['comment' => trim($matches[1]), 'shared' => trim($matches[3])];
3852                 foreach (['author', 'profile', 'avatar', 'guid', 'posted', 'link'] as $field) {
3853                         if (preg_match("/$field=(['\"])(.+?)\\1/ism", $attribute_string, $matches)) {
3854                                 $attributes[$field] = trim(html_entity_decode($matches[2] ?? '', ENT_QUOTES, 'UTF-8'));
3855                         }
3856                 }
3857                 return $attributes;
3858         }
3859
3860         /**
3861          * Fetch item information for shared items from the original items and adds it.
3862          *
3863          * @param array $item
3864          *
3865          * @return array item array with data from the original item
3866          */
3867         public static function addShareDataFromOriginal($item)
3868         {
3869                 $shared = self::getShareArray($item);
3870                 if (empty($shared)) {
3871                         return $item;
3872                 }
3873
3874                 // Real reshares always have got a GUID.
3875                 if (empty($shared['guid'])) {
3876                         return $item;
3877                 }
3878
3879                 $uid = $item['uid'] ?? 0;
3880
3881                 // first try to fetch the item via the GUID. This will work for all reshares that had been created on this system
3882                 $shared_item = self::selectFirst(['title', 'body', 'attach'], ['guid' => $shared['guid'], 'uid' => [0, $uid]]);
3883                 if (!DBA::isResult($shared_item)) {
3884                         if (empty($shared['link'])) {
3885                                 return $item;
3886                         }
3887
3888                         // Otherwhise try to find (and possibly fetch) the item via the link. This should work for Diaspora and ActivityPub posts
3889                         $id = self::fetchByLink($shared['link'], $uid);
3890                         if (empty($id)) {
3891                                 Logger::info('Original item not found', ['url' => $shared['link'], 'callstack' => System::callstack()]);
3892                                 return $item;
3893                         }
3894
3895                         $shared_item = self::selectFirst(['title', 'body', 'attach'], ['id' => $id]);
3896                         if (!DBA::isResult($shared_item)) {
3897                                 return $item;
3898                         }
3899                         Logger::info('Got shared data from url', ['url' => $shared['link'], 'callstack' => System::callstack()]);
3900                 } else {
3901                         Logger::info('Got shared data from guid', ['guid' => $shared['guid'], 'callstack' => System::callstack()]);
3902                 }
3903
3904                 if (!empty($shared_item['title'])) {
3905                         $body = '[h3]' . $shared_item['title'] . "[/h3]\n" . $shared_item['body'];
3906                         unset($shared_item['title']);
3907                 } else {
3908                         $body = $shared_item['body'];
3909                 }
3910
3911                 $item['body'] = preg_replace("/\[share ([^\[\]]*)\].*\[\/share\]/ism", '[share $1]' . $body . '[/share]', $item['body']);
3912                 unset($shared_item['body']);
3913
3914                 return array_merge($item, $shared_item);
3915         }
3916 }