src/Model/Item.php

   1 <?php
   2
   3 /**
   4  * @file src/Model/Item.php
   5  */
   6
   7 namespace Friendica\Model;
   8
   9 use Friendica\BaseObject;
  10 use Friendica\Content\Text\BBCode;
  11 use Friendica\Content\Text\HTML;
  12 use Friendica\Core\Config;
  13 use Friendica\Core\Hook;
  14 use Friendica\Core\L10n;
  15 use Friendica\Core\Lock;
  16 use Friendica\Core\Logger;
  17 use Friendica\Core\PConfig;
  18 use Friendica\Core\Protocol;
  19 use Friendica\Core\Renderer;
  20 use Friendica\Core\Session;
  21 use Friendica\Core\System;
  22 use Friendica\Core\Worker;
  23 use Friendica\Database\DBA;
  24 use Friendica\Protocol\Activity;
  25 use Friendica\Protocol\ActivityPub;
  26 use Friendica\Protocol\Diaspora;
  27 use Friendica\Protocol\OStatus;
  28 use Friendica\Util\ACLFormatter;
  29 use Friendica\Util\DateTimeFormat;
  30 use Friendica\Util\Map;
  31 use Friendica\Util\Network;
  32 use Friendica\Util\Security;
  33 use Friendica\Util\Strings;
  34 use Friendica\Util\XML;
  35 use Friendica\Worker\Delivery;
  36 use Text_LanguageDetect;
  37
  38 class Item extends BaseObject
  39 {
  40         // Posting types, inspired by https://www.w3.org/TR/activitystreams-vocabulary/#object-types
  41         const PT_ARTICLE = 0;
  42         const PT_NOTE = 1;
  43         const PT_PAGE = 2;
  44         const PT_IMAGE = 16;
  45         const PT_AUDIO = 17;
  46         const PT_VIDEO = 18;
  47         const PT_DOCUMENT = 19;
  48         const PT_EVENT = 32;
  49         const PT_PERSONAL_NOTE = 128;
  50
  51         // Field list that is used to display the items
  52         const DISPLAY_FIELDLIST = [
  53                 'uid', 'id', 'parent', 'uri', 'thr-parent', 'parent-uri', 'guid', 'network', 'gravity',
  54                 'commented', 'created', 'edited', 'received', 'verb', 'object-type', 'postopts', 'plink',
  55                 'wall', 'private', 'starred', 'origin', 'title', 'body', 'file', 'attach', 'language',
  56                 'content-warning', 'location', 'coord', 'app', 'rendered-hash', 'rendered-html', 'object',
  57                 'allow_cid', 'allow_gid', 'deny_cid', 'deny_gid', 'item_id',
  58                 'author-id', 'author-link', 'author-name', 'author-avatar', 'author-network',
  59                 'owner-id', 'owner-link', 'owner-name', 'owner-avatar', 'owner-network',
  60                 'contact-id', 'contact-uid', 'contact-link', 'contact-name', 'contact-avatar',
  61                 'writable', 'self', 'cid', 'alias', 'pinned',
  62                 'event-id', 'event-created', 'event-edited', 'event-start', 'event-finish',
  63                 'event-summary', 'event-desc', 'event-location', 'event-type',
  64                 'event-nofinish', 'event-adjust', 'event-ignore', 'event-id',
  65                 'delivery_queue_count', 'delivery_queue_done', 'delivery_queue_failed'
  66         ];
  67
  68         // Field list that is used to deliver items via the protocols
  69         const DELIVER_FIELDLIST = ['uid', 'id', 'parent', 'uri', 'thr-parent', 'parent-uri', 'guid',
  70                         'parent-guid', 'created', 'edited', 'verb', 'object-type', 'object', 'target',
  71                         'private', 'title', 'body', 'location', 'coord', 'app',
  72                         'attach', 'tag', 'deleted', 'extid', 'post-type',
  73                         'allow_cid', 'allow_gid', 'deny_cid', 'deny_gid',
  74                         'author-id', 'author-link', 'owner-link', 'contact-uid',
  75                         'signed_text', 'signature', 'signer', 'network'];
  76
  77         // Field list for "item-content" table that is mixed with the item table
  78         const MIXED_CONTENT_FIELDLIST = ['title', 'content-warning', 'body', 'location',
  79                         'coord', 'app', 'rendered-hash', 'rendered-html', 'verb',
  80                         'object-type', 'object', 'target-type', 'target', 'plink'];
  81
  82         // Field list for "item-content" table that is not present in the "item" table
  83         const CONTENT_FIELDLIST = ['language'];
  84
  85         // All fields in the item table
  86         const ITEM_FIELDLIST = ['id', 'uid', 'parent', 'uri', 'parent-uri', 'thr-parent', 'guid',
  87                         'contact-id', 'type', 'wall', 'gravity', 'extid', 'icid', 'iaid', 'psid',
  88                         'created', 'edited', 'commented', 'received', 'changed', 'verb',
  89                         'postopts', 'plink', 'resource-id', 'event-id', 'tag', 'attach', 'inform',
  90                         'file', 'allow_cid', 'allow_gid', 'deny_cid', 'deny_gid', 'post-type',
  91                         'private', 'pubmail', 'moderated', 'visible', 'starred', 'bookmark',
  92                         'unseen', 'deleted', 'origin', 'forum_mode', 'mention', 'global', 'network',
  93                         'title', 'content-warning', 'body', 'location', 'coord', 'app',
  94                         'rendered-hash', 'rendered-html', 'object-type', 'object', 'target-type', 'target',
  95                         'author-id', 'author-link', 'author-name', 'author-avatar', 'author-network',
  96                         'owner-id', 'owner-link', 'owner-name', 'owner-avatar'];
  97
  98         // Never reorder or remove entries from this list. Just add new ones at the end, if needed.
  99         // The item-activity table only stores the index and needs this array to know the matching activity.
 100         const ACTIVITIES = [
 101                 Activity::LIKE, Activity::DISLIKE,
 102                 Activity::ATTEND, Activity::ATTENDNO, Activity::ATTENDMAYBE,
 103                 Activity::FOLLOW,
 104                 Activity::ANNOUNCE];
 105
 106         private static $legacy_mode = null;
 107
 108         public static function isLegacyMode()
 109         {
 110                 if (is_null(self::$legacy_mode)) {
 111                         self::$legacy_mode = (Config::get("system", "post_update_version") < 1279);
 112                 }
 113
 114                 return self::$legacy_mode;
 115         }
 116
 117         /**
 118          * Set the pinned state of an item
 119          *
 120          * @param integer $iid    Item ID
 121          * @param integer $uid    User ID
 122          * @param boolean $pinned Pinned state
 123          */
 124         public static function setPinned(int $iid, int $uid, bool $pinned)
 125         {
 126                 DBA::update('user-item', ['pinned' => $pinned], ['iid' => $iid, 'uid' => $uid], true);
 127         }
 128
 129         /**
 130          * Get the pinned state
 131          *
 132          * @param integer $iid Item ID
 133          * @param integer $uid User ID
 134          *
 135          * @return boolean pinned state
 136          */
 137         public static function getPinned(int $iid, int $uid)
 138         {
 139                 $useritem = DBA::selectFirst('user-item', ['pinned'], ['iid' => $iid, 'uid' => $uid]);
 140                 if (!DBA::isResult($useritem)) {
 141                         return false;
 142                 }
 143                 return (bool)$useritem['pinned'];
 144         }
 145
 146         /**
 147          * @brief Select pinned rows from the item table for a given user
 148          *
 149          * @param integer $uid       User ID
 150          * @param array   $selected  Array of selected fields, empty for all
 151          * @param array   $condition Array of fields for condition
 152          * @param array   $params    Array of several parameters
 153          *
 154          * @return boolean|object
 155          * @throws \Exception
 156          */
 157         public static function selectPinned(int $uid, array $selected = [], array $condition = [], $params = [])
 158         {
 159                 $useritems = DBA::select('user-item', ['iid'], ['uid' => $uid, 'pinned' => true]);
 160                 if (!DBA::isResult($useritems)) {
 161                         return $useritems;
 162                 }
 163
 164                 $pinned = [];
 165                 while ($useritem = self::fetch($useritems)) {
 166                         $pinned[] = $useritem['iid'];
 167                 }
 168                 DBA::close($useritems);
 169
 170                 if (empty($pinned)) {
 171                         return [];
 172                 }
 173
 174                 if (empty($condition) || !is_array($condition)) {
 175                         $condition = ['iid' => $pinned];
 176                 } else {
 177                         reset($condition);
 178                         $first_key = key($condition);
 179                         if (!is_int($first_key)) {
 180                                 $condition['iid'] = $pinned;
 181                         } else {
 182                                 $values_string = substr(str_repeat("?, ", count($pinned)), 0, -2);
 183                                 $condition[0] = '(' . $condition[0] . ") AND `iid` IN (" . $values_string . ")";
 184                                 $condition = array_merge($condition, $pinned);
 185                         }
 186                 }
 187
 188                 return self::selectThreadForUser($uid, $selected, $condition, $params);
 189         }
 190
 191         /**
 192          * @brief returns an activity index from an activity string
 193          *
 194          * @param string $activity activity string
 195          * @return integer Activity index
 196          */
 197         public static function activityToIndex($activity)
 198         {
 199                 $index = array_search($activity, self::ACTIVITIES);
 200
 201                 if (is_bool($index)) {
 202                         $index = -1;
 203                 }
 204
 205                 return $index;
 206         }
 207
 208         /**
 209          * @brief returns an activity string from an activity index
 210          *
 211          * @param integer $index activity index
 212          * @return string Activity string
 213          */
 214         private static function indexToActivity($index)
 215         {
 216                 if (is_null($index) || !array_key_exists($index, self::ACTIVITIES)) {
 217                         return '';
 218                 }
 219
 220                 return self::ACTIVITIES[$index];
 221         }
 222
 223         /**
 224          * @brief Fetch a single item row
 225          *
 226          * @param mixed $stmt statement object
 227          * @return array current row
 228          */
 229         public static function fetch($stmt)
 230         {
 231                 $row = DBA::fetch($stmt);
 232
 233                 if (is_bool($row)) {
 234                         return $row;
 235                 }
 236
 237                 // ---------------------- Transform item structure data ----------------------
 238
 239                 // We prefer the data from the user's contact over the public one
 240                 if (!empty($row['author-link']) && !empty($row['contact-link']) &&
 241                         ($row['author-link'] == $row['contact-link'])) {
 242                         if (isset($row['author-avatar']) && !empty($row['contact-avatar'])) {
 243                                 $row['author-avatar'] = $row['contact-avatar'];
 244                         }
 245                         if (isset($row['author-name']) && !empty($row['contact-name'])) {
 246                                 $row['author-name'] = $row['contact-name'];
 247                         }
 248                 }
 249
 250                 if (!empty($row['owner-link']) && !empty($row['contact-link']) &&
 251                         ($row['owner-link'] == $row['contact-link'])) {
 252                         if (isset($row['owner-avatar']) && !empty($row['contact-avatar'])) {
 253                                 $row['owner-avatar'] = $row['contact-avatar'];
 254                         }
 255                         if (isset($row['owner-name']) && !empty($row['contact-name'])) {
 256                                 $row['owner-name'] = $row['contact-name'];
 257                         }
 258                 }
 259
 260                 // We can always comment on posts from these networks
 261                 if (array_key_exists('writable', $row) &&
 262                         in_array($row['internal-network'], Protocol::FEDERATED)) {
 263                         $row['writable'] = true;
 264                 }
 265
 266                 // ---------------------- Transform item content data ----------------------
 267
 268                 // Fetch data from the item-content table whenever there is content there
 269                 if (self::isLegacyMode()) {
 270                         $legacy_fields = array_merge(ItemDeliveryData::LEGACY_FIELD_LIST, self::MIXED_CONTENT_FIELDLIST);
 271                         foreach ($legacy_fields as $field) {
 272                                 if (empty($row[$field]) && !empty($row['internal-item-' . $field])) {
 273                                         $row[$field] = $row['internal-item-' . $field];
 274                                 }
 275                                 unset($row['internal-item-' . $field]);
 276                         }
 277                 }
 278
 279                 if (!empty($row['internal-iaid']) && array_key_exists('verb', $row)) {
 280                         $row['verb'] = self::indexToActivity($row['internal-activity']);
 281                         if (array_key_exists('title', $row)) {
 282                                 $row['title'] = '';
 283                         }
 284                         if (array_key_exists('body', $row)) {
 285                                 $row['body'] = $row['verb'];
 286                         }
 287                         if (array_key_exists('object', $row)) {
 288                                 $row['object'] = '';
 289                         }
 290                         if (array_key_exists('object-type', $row)) {
 291                                 $row['object-type'] = Activity\ObjectType::NOTE;
 292                         }
 293                 } elseif (array_key_exists('verb', $row) && in_array($row['verb'], ['', Activity::POST, Activity::SHARE])) {
 294                         // Posts don't have an object or target - but having tags or files.
 295                         // We safe some performance by building tag and file strings only here.
 296                         // We remove object and target since they aren't used for this type.
 297                         if (array_key_exists('object', $row)) {
 298                                 $row['object'] = '';
 299                         }
 300                         if (array_key_exists('target', $row)) {
 301                                 $row['target'] = '';
 302                         }
 303                 }
 304
 305                 if (!array_key_exists('verb', $row) || in_array($row['verb'], ['', Activity::POST, Activity::SHARE])) {
 306                         // Build the tag string out of the term entries
 307                         if (array_key_exists('tag', $row) && empty($row['tag'])) {
 308                                 $row['tag'] = Term::tagTextFromItemId($row['internal-iid']);
 309                         }
 310
 311                         // Build the file string out of the term entries
 312                         if (array_key_exists('file', $row) && empty($row['file'])) {
 313                                 $row['file'] = Term::fileTextFromItemId($row['internal-iid']);
 314                         }
 315                 }
 316
 317                 if (array_key_exists('signed_text', $row) && array_key_exists('interaction', $row) && !is_null($row['interaction'])) {
 318                         $row['signed_text'] = $row['interaction'];
 319                 }
 320
 321                 if (array_key_exists('ignored', $row) && array_key_exists('internal-user-ignored', $row) && !is_null($row['internal-user-ignored'])) {
 322                         $row['ignored'] = $row['internal-user-ignored'];
 323                 }
 324
 325                 // Remove internal fields
 326                 unset($row['internal-activity']);
 327                 unset($row['internal-network']);
 328                 unset($row['internal-iid']);
 329                 unset($row['internal-iaid']);
 330                 unset($row['internal-icid']);
 331                 unset($row['internal-user-ignored']);
 332                 unset($row['interaction']);
 333
 334                 return $row;
 335         }
 336
 337         /**
 338          * @brief Fills an array with data from an item query
 339          *
 340          * @param object $stmt statement object
 341          * @param bool   $do_close
 342          * @return array Data array
 343          */
 344         public static function inArray($stmt, $do_close = true) {
 345                 if (is_bool($stmt)) {
 346                         return $stmt;
 347                 }
 348
 349                 $data = [];
 350                 while ($row = self::fetch($stmt)) {
 351                         $data[] = $row;
 352                 }
 353                 if ($do_close) {
 354                         DBA::close($stmt);
 355                 }
 356                 return $data;
 357         }
 358
 359         /**
 360          * @brief Check if item data exists
 361          *
 362          * @param array $condition array of fields for condition
 363          *
 364          * @return boolean Are there rows for that condition?
 365          * @throws \Exception
 366          */
 367         public static function exists($condition) {
 368                 $stmt = self::select(['id'], $condition, ['limit' => 1]);
 369
 370                 if (is_bool($stmt)) {
 371                         $retval = $stmt;
 372                 } else {
 373                         $retval = (DBA::numRows($stmt) > 0);
 374                 }
 375
 376                 DBA::close($stmt);
 377
 378                 return $retval;
 379         }
 380
 381         /**
 382          * Retrieve a single record from the item table for a given user and returns it in an associative array
 383          *
 384          * @brief Retrieve a single record from a table
 385          * @param integer $uid User ID
 386          * @param array   $selected
 387          * @param array   $condition
 388          * @param array   $params
 389          * @return bool|array
 390          * @throws \Exception
 391          * @see   DBA::select
 392          */
 393         public static function selectFirstForUser($uid, array $selected = [], array $condition = [], $params = [])
 394         {
 395                 $params['uid'] = $uid;
 396
 397                 if (empty($selected)) {
 398                         $selected = Item::DISPLAY_FIELDLIST;
 399                 }
 400
 401                 return self::selectFirst($selected, $condition, $params);
 402         }
 403
 404         /**
 405          * @brief Select rows from the item table for a given user
 406          *
 407          * @param integer $uid       User ID
 408          * @param array   $selected  Array of selected fields, empty for all
 409          * @param array   $condition Array of fields for condition
 410          * @param array   $params    Array of several parameters
 411          *
 412          * @return boolean|object
 413          * @throws \Exception
 414          */
 415         public static function selectForUser($uid, array $selected = [], array $condition = [], $params = [])
 416         {
 417                 $params['uid'] = $uid;
 418
 419                 if (empty($selected)) {
 420                         $selected = Item::DISPLAY_FIELDLIST;
 421                 }
 422
 423                 return self::select($selected, $condition, $params);
 424         }
 425
 426         /**
 427          * Retrieve a single record from the item table and returns it in an associative array
 428          *
 429          * @brief Retrieve a single record from a table
 430          * @param array $fields
 431          * @param array $condition
 432          * @param array $params
 433          * @return bool|array
 434          * @throws \Exception
 435          * @see   DBA::select
 436          */
 437         public static function selectFirst(array $fields = [], array $condition = [], $params = [])
 438         {
 439                 $params['limit'] = 1;
 440
 441                 $result = self::select($fields, $condition, $params);
 442
 443                 if (is_bool($result)) {
 444                         return $result;
 445                 } else {
 446                         $row = self::fetch($result);
 447                         DBA::close($result);
 448                         return $row;
 449                 }
 450         }
 451
 452         /**
 453          * @brief Select rows from the item table and returns them as an array
 454          *
 455          * @param array $selected  Array of selected fields, empty for all
 456          * @param array $condition Array of fields for condition
 457          * @param array $params    Array of several parameters
 458          *
 459          * @return array
 460          * @throws \Exception
 461          */
 462         public static function selectToArray(array $fields = [], array $condition = [], $params = [])
 463         {
 464                 $result = self::select($fields, $condition, $params);
 465
 466                 if (is_bool($result)) {
 467                         return [];
 468                 }
 469
 470                 $data = [];
 471                 while ($row = self::fetch($result)) {
 472                         $data[] = $row;
 473                 }
 474                 DBA::close($result);
 475
 476                 return $data;
 477         }
 478
 479         /**
 480          * @brief Select rows from the item table
 481          *
 482          * @param array $selected  Array of selected fields, empty for all
 483          * @param array $condition Array of fields for condition
 484          * @param array $params    Array of several parameters
 485          *
 486          * @return boolean|object
 487          * @throws \Exception
 488          */
 489         public static function select(array $selected = [], array $condition = [], $params = [])
 490         {
 491                 $uid = 0;
 492                 $usermode = false;
 493
 494                 if (isset($params['uid'])) {
 495                         $uid = $params['uid'];
 496                         $usermode = true;
 497                 }
 498
 499                 $fields = self::fieldlist($usermode);
 500
 501                 $select_fields = self::constructSelectFields($fields, $selected);
 502
 503                 $condition_string = DBA::buildCondition($condition);
 504
 505                 $condition_string = self::addTablesToFields($condition_string, $fields);
 506
 507                 if ($usermode) {
 508                         $condition_string = $condition_string . ' AND ' . self::condition(false);
 509                 }
 510
 511                 $param_string = self::addTablesToFields(DBA::buildParameter($params), $fields);
 512
 513                 $table = "`item` " . self::constructJoins($uid, $select_fields . $condition_string . $param_string, false, $usermode);
 514
 515                 $sql = "SELECT " . $select_fields . " FROM " . $table . $condition_string . $param_string;
 516
 517                 return DBA::p($sql, $condition);
 518         }
 519
 520         /**
 521          * @brief Select rows from the starting post in the item table
 522          *
 523          * @param integer $uid       User ID
 524          * @param array   $selected
 525          * @param array   $condition Array of fields for condition
 526          * @param array   $params    Array of several parameters
 527          *
 528          * @return boolean|object
 529          * @throws \Exception
 530          */
 531         public static function selectThreadForUser($uid, array $selected = [], array $condition = [], $params = [])
 532         {
 533                 $params['uid'] = $uid;
 534
 535                 if (empty($selected)) {
 536                         $selected = Item::DISPLAY_FIELDLIST;
 537                 }
 538
 539                 return self::selectThread($selected, $condition, $params);
 540         }
 541
 542         /**
 543          * Retrieve a single record from the starting post in the item table and returns it in an associative array
 544          *
 545          * @brief Retrieve a single record from a table
 546          * @param integer $uid User ID
 547          * @param array   $selected
 548          * @param array   $condition
 549          * @param array   $params
 550          * @return bool|array
 551          * @throws \Exception
 552          * @see   DBA::select
 553          */
 554         public static function selectFirstThreadForUser($uid, array $selected = [], array $condition = [], $params = [])
 555         {
 556                 $params['uid'] = $uid;
 557
 558                 if (empty($selected)) {
 559                         $selected = Item::DISPLAY_FIELDLIST;
 560                 }
 561
 562                 return self::selectFirstThread($selected, $condition, $params);
 563         }
 564
 565         /**
 566          * Retrieve a single record from the starting post in the item table and returns it in an associative array
 567          *
 568          * @brief Retrieve a single record from a table
 569          * @param array $fields
 570          * @param array $condition
 571          * @param array $params
 572          * @return bool|array
 573          * @throws \Exception
 574          * @see   DBA::select
 575          */
 576         public static function selectFirstThread(array $fields = [], array $condition = [], $params = [])
 577         {
 578                 $params['limit'] = 1;
 579                 $result = self::selectThread($fields, $condition, $params);
 580
 581                 if (is_bool($result)) {
 582                         return $result;
 583                 } else {
 584                         $row = self::fetch($result);
 585                         DBA::close($result);
 586                         return $row;
 587                 }
 588         }
 589
 590         /**
 591          * @brief Select rows from the starting post in the item table
 592          *
 593          * @param array $selected  Array of selected fields, empty for all
 594          * @param array $condition Array of fields for condition
 595          * @param array $params    Array of several parameters
 596          *
 597          * @return boolean|object
 598          * @throws \Exception
 599          */
 600         public static function selectThread(array $selected = [], array $condition = [], $params = [])
 601         {
 602                 $uid = 0;
 603                 $usermode = false;
 604
 605                 if (isset($params['uid'])) {
 606                         $uid = $params['uid'];
 607                         $usermode = true;
 608                 }
 609
 610                 $fields = self::fieldlist($usermode);
 611
 612                 $fields['thread'] = ['mention', 'ignored', 'iid'];
 613
 614                 $threadfields = ['thread' => ['iid', 'uid', 'contact-id', 'owner-id', 'author-id',
 615                         'created', 'edited', 'commented', 'received', 'changed', 'wall', 'private',
 616                         'pubmail', 'moderated', 'visible', 'starred', 'ignored', 'post-type',
 617                         'unseen', 'deleted', 'origin', 'forum_mode', 'mention', 'network']];
 618
 619                 $select_fields = self::constructSelectFields($fields, $selected);
 620
 621                 $condition_string = DBA::buildCondition($condition);
 622
 623                 $condition_string = self::addTablesToFields($condition_string, $threadfields);
 624                 $condition_string = self::addTablesToFields($condition_string, $fields);
 625
 626                 if ($usermode) {
 627                         $condition_string = $condition_string . ' AND ' . self::condition(true);
 628                 }
 629
 630                 $param_string = DBA::buildParameter($params);
 631                 $param_string = self::addTablesToFields($param_string, $threadfields);
 632                 $param_string = self::addTablesToFields($param_string, $fields);
 633
 634                 $table = "`thread` " . self::constructJoins($uid, $select_fields . $condition_string . $param_string, true, $usermode);
 635
 636                 $sql = "SELECT " . $select_fields . " FROM " . $table . $condition_string . $param_string;
 637
 638                 return DBA::p($sql, $condition);
 639         }
 640
 641         /**
 642          * @brief Returns a list of fields that are associated with the item table
 643          *
 644          * @param $usermode
 645          * @return array field list
 646          */
 647         private static function fieldlist($usermode)
 648         {
 649                 $fields = [];
 650
 651                 $fields['item'] = ['id', 'uid', 'parent', 'uri', 'parent-uri', 'thr-parent', 'guid',
 652                         'contact-id', 'owner-id', 'author-id', 'type', 'wall', 'gravity', 'extid',
 653                         'created', 'edited', 'commented', 'received', 'changed', 'psid',
 654                         'resource-id', 'event-id', 'tag', 'attach', 'post-type', 'file',
 655                         'private', 'pubmail', 'moderated', 'visible', 'starred', 'bookmark',
 656                         'unseen', 'deleted', 'origin', 'forum_mode', 'mention', 'global',
 657                         'id' => 'item_id', 'network', 'icid', 'iaid', 'id' => 'internal-iid',
 658                         'network' => 'internal-network', 'icid' => 'internal-icid',
 659                         'iaid' => 'internal-iaid'];
 660
 661                 if ($usermode) {
 662                         $fields['user-item'] = ['pinned', 'ignored' => 'internal-user-ignored'];
 663                 }
 664
 665                 $fields['item-activity'] = ['activity', 'activity' => 'internal-activity'];
 666
 667                 $fields['item-content'] = array_merge(self::CONTENT_FIELDLIST, self::MIXED_CONTENT_FIELDLIST);
 668
 669                 $fields['item-delivery-data'] = array_merge(ItemDeliveryData::LEGACY_FIELD_LIST, ItemDeliveryData::FIELD_LIST);
 670
 671                 $fields['permissionset'] = ['allow_cid', 'allow_gid', 'deny_cid', 'deny_gid'];
 672
 673                 $fields['author'] = ['url' => 'author-link', 'name' => 'author-name', 'addr' => 'author-addr',
 674                         'thumb' => 'author-avatar', 'nick' => 'author-nick', 'network' => 'author-network'];
 675
 676                 $fields['owner'] = ['url' => 'owner-link', 'name' => 'owner-name', 'addr' => 'owner-addr',
 677                         'thumb' => 'owner-avatar', 'nick' => 'owner-nick', 'network' => 'owner-network'];
 678
 679                 $fields['contact'] = ['url' => 'contact-link', 'name' => 'contact-name', 'thumb' => 'contact-avatar',
 680                         'writable', 'self', 'id' => 'cid', 'alias', 'uid' => 'contact-uid',
 681                         'photo', 'name-date', 'uri-date', 'avatar-date', 'thumb', 'dfrn-id'];
 682
 683                 $fields['parent-item'] = ['guid' => 'parent-guid', 'network' => 'parent-network'];
 684
 685                 $fields['parent-item-author'] = ['url' => 'parent-author-link', 'name' => 'parent-author-name'];
 686
 687                 $fields['event'] = ['created' => 'event-created', 'edited' => 'event-edited',
 688                         'start' => 'event-start','finish' => 'event-finish',
 689                         'summary' => 'event-summary','desc' => 'event-desc',
 690                         'location' => 'event-location', 'type' => 'event-type',
 691                         'nofinish' => 'event-nofinish','adjust' => 'event-adjust',
 692                         'ignore' => 'event-ignore', 'id' => 'event-id'];
 693
 694                 $fields['sign'] = ['signed_text', 'signature', 'signer'];
 695
 696                 $fields['diaspora-interaction'] = ['interaction'];
 697
 698                 return $fields;
 699         }
 700
 701         /**
 702          * @brief Returns SQL condition for the "select" functions
 703          *
 704          * @param boolean $thread_mode Called for the items (false) or for the threads (true)
 705          *
 706          * @return string SQL condition
 707          */
 708         private static function condition($thread_mode)
 709         {
 710                 if ($thread_mode) {
 711                         $master_table = "`thread`";
 712                 } else {
 713                         $master_table = "`item`";
 714                 }
 715                 return sprintf("$master_table.`visible` AND NOT $master_table.`deleted` AND NOT $master_table.`moderated`
 716                         AND (`user-item`.`hidden` IS NULL OR NOT `user-item`.`hidden`)
 717                         AND (`user-author`.`blocked` IS NULL OR NOT `user-author`.`blocked`)
 718                         AND (`user-author`.`ignored` IS NULL OR NOT `user-author`.`ignored` OR `item`.`gravity` != %d)
 719                         AND (`user-owner`.`blocked` IS NULL OR NOT `user-owner`.`blocked`)
 720                         AND (`user-owner`.`ignored` IS NULL OR NOT `user-owner`.`ignored` OR `item`.`gravity` != %d) ",
 721                         GRAVITY_PARENT, GRAVITY_PARENT);
 722         }
 723
 724         /**
 725          * @brief Returns all needed "JOIN" commands for the "select" functions
 726          *
 727          * @param integer $uid          User ID
 728          * @param string  $sql_commands The parts of the built SQL commands in the "select" functions
 729          * @param boolean $thread_mode  Called for the items (false) or for the threads (true)
 730          *
 731          * @param         $user_mode
 732          * @return string The SQL joins for the "select" functions
 733          */
 734         private static function constructJoins($uid, $sql_commands, $thread_mode, $user_mode)
 735         {
 736                 if ($thread_mode) {
 737                         $master_table = "`thread`";
 738                         $master_table_key = "`thread`.`iid`";
 739                         $joins = "STRAIGHT_JOIN `item` ON `item`.`id` = `thread`.`iid` ";
 740                 } else {
 741                         $master_table = "`item`";
 742                         $master_table_key = "`item`.`id`";
 743                         $joins = '';
 744                 }
 745
 746                 if ($user_mode) {
 747                         $joins .= sprintf("STRAIGHT_JOIN `contact` ON `contact`.`id` = $master_table.`contact-id`
 748                                 AND NOT `contact`.`blocked`
 749                                 AND ((NOT `contact`.`readonly` AND NOT `contact`.`pending` AND (`contact`.`rel` IN (%s, %s)))
 750                                 OR `contact`.`self` OR `item`.`gravity` != %d OR `contact`.`uid` = 0)
 751                                 STRAIGHT_JOIN `contact` AS `author` ON `author`.`id` = $master_table.`author-id` AND NOT `author`.`blocked`
 752                                 STRAIGHT_JOIN `contact` AS `owner` ON `owner`.`id` = $master_table.`owner-id` AND NOT `owner`.`blocked`
 753                                 LEFT JOIN `user-item` ON `user-item`.`iid` = $master_table_key AND `user-item`.`uid` = %d
 754                                 LEFT JOIN `user-contact` AS `user-author` ON `user-author`.`cid` = $master_table.`author-id` AND `user-author`.`uid` = %d
 755                                 LEFT JOIN `user-contact` AS `user-owner` ON `user-owner`.`cid` = $master_table.`owner-id` AND `user-owner`.`uid` = %d",
 756                                 Contact::SHARING, Contact::FRIEND, GRAVITY_PARENT, intval($uid), intval($uid), intval($uid));
 757                 } else {
 758                         if (strpos($sql_commands, "`contact`.") !== false) {
 759                                 $joins .= "LEFT JOIN `contact` ON `contact`.`id` = $master_table.`contact-id`";
 760                         }
 761                         if (strpos($sql_commands, "`author`.") !== false) {
 762                                 $joins .= " LEFT JOIN `contact` AS `author` ON `author`.`id` = $master_table.`author-id`";
 763                         }
 764                         if (strpos($sql_commands, "`owner`.") !== false) {
 765                                 $joins .= " LEFT JOIN `contact` AS `owner` ON `owner`.`id` = $master_table.`owner-id`";
 766                         }
 767                 }
 768
 769                 if (strpos($sql_commands, "`group_member`.") !== false) {
 770                         $joins .= " STRAIGHT_JOIN `group_member` ON `group_member`.`contact-id` = $master_table.`contact-id`";
 771                 }
 772
 773                 if (strpos($sql_commands, "`user`.") !== false) {
 774                         $joins .= " STRAIGHT_JOIN `user` ON `user`.`uid` = $master_table.`uid`";
 775                 }
 776
 777                 if (strpos($sql_commands, "`event`.") !== false) {
 778                         $joins .= " LEFT JOIN `event` ON `event-id` = `event`.`id`";
 779                 }
 780
 781                 if (strpos($sql_commands, "`sign`.") !== false) {
 782                         $joins .= " LEFT JOIN `sign` ON `sign`.`iid` = `item`.`id`";
 783                 }
 784
 785                 if (strpos($sql_commands, "`diaspora-interaction`.") !== false) {
 786                         $joins .= " LEFT JOIN `diaspora-interaction` ON `diaspora-interaction`.`uri-id` = `item`.`uri-id`";
 787                 }
 788
 789                 if (strpos($sql_commands, "`item-activity`.") !== false) {
 790                         $joins .= " LEFT JOIN `item-activity` ON `item-activity`.`uri-id` = `item`.`uri-id`";
 791                 }
 792
 793                 if (strpos($sql_commands, "`item-content`.") !== false) {
 794                         $joins .= " LEFT JOIN `item-content` ON `item-content`.`uri-id` = `item`.`uri-id`";
 795                 }
 796
 797                 if (strpos($sql_commands, "`item-delivery-data`.") !== false) {
 798                         $joins .= " LEFT JOIN `item-delivery-data` ON `item-delivery-data`.`iid` = `item`.`id`";
 799                 }
 800
 801                 if (strpos($sql_commands, "`permissionset`.") !== false) {
 802                         $joins .= " LEFT JOIN `permissionset` ON `permissionset`.`id` = `item`.`psid`";
 803                 }
 804
 805                 if ((strpos($sql_commands, "`parent-item`.") !== false) || (strpos($sql_commands, "`parent-author`.") !== false)) {
 806                         $joins .= " STRAIGHT_JOIN `item` AS `parent-item` ON `parent-item`.`id` = `item`.`parent`";
 807                 }
 808
 809                 if (strpos($sql_commands, "`parent-item-author`.") !== false) {
 810                         $joins .= " STRAIGHT_JOIN `contact` AS `parent-item-author` ON `parent-item-author`.`id` = `parent-item`.`author-id`";
 811                 }
 812
 813                 return $joins;
 814         }
 815
 816         /**
 817          * @brief Add the field list for the "select" functions
 818          *
 819          * @param array $fields The field definition array
 820          * @param array $selected The array with the selected fields from the "select" functions
 821          *
 822          * @return string The field list
 823          */
 824         private static function constructSelectFields($fields, $selected)
 825         {
 826                 if (!empty($selected)) {
 827                         $selected[] = 'internal-iid';
 828                         $selected[] = 'internal-iaid';
 829                         $selected[] = 'internal-icid';
 830                         $selected[] = 'internal-network';
 831                 }
 832
 833                 if (in_array('verb', $selected)) {
 834                         $selected[] = 'internal-activity';
 835                 }
 836
 837                 if (in_array('ignored', $selected)) {
 838                         $selected[] = 'internal-user-ignored';
 839                 }
 840
 841                 if (in_array('signed_text', $selected)) {
 842                         $selected[] = 'interaction';
 843                 }
 844
 845                 $legacy_fields = array_merge(ItemDeliveryData::LEGACY_FIELD_LIST, self::MIXED_CONTENT_FIELDLIST);
 846
 847                 $selection = [];
 848                 foreach ($fields as $table => $table_fields) {
 849                         foreach ($table_fields as $field => $select) {
 850                                 if (empty($selected) || in_array($select, $selected)) {
 851                                         if (self::isLegacyMode() && in_array($select, $legacy_fields)) {
 852                                                 $selection[] = "`item`.`".$select."` AS `internal-item-" . $select . "`";
 853                                         }
 854                                         if (is_int($field)) {
 855                                                 $selection[] = "`" . $table . "`.`" . $select . "`";
 856                                         } else {
 857                                                 $selection[] = "`" . $table . "`.`" . $field . "` AS `" . $select . "`";
 858                                         }
 859                                 }
 860                         }
 861                 }
 862                 return implode(", ", $selection);
 863         }
 864
 865         /**
 866          * @brief add table definition to fields in an SQL query
 867          *
 868          * @param string $query SQL query
 869          * @param array $fields The field definition array
 870          *
 871          * @return string the changed SQL query
 872          */
 873         private static function addTablesToFields($query, $fields)
 874         {
 875                 foreach ($fields as $table => $table_fields) {
 876                         foreach ($table_fields as $alias => $field) {
 877                                 if (is_int($alias)) {
 878                                         $replace_field = $field;
 879                                 } else {
 880                                         $replace_field = $alias;
 881                                 }
 882
 883                                 $search = "/([^\.])`" . $field . "`/i";
 884                                 $replace = "$1`" . $table . "`.`" . $replace_field . "`";
 885                                 $query = preg_replace($search, $replace, $query);
 886                         }
 887                 }
 888                 return $query;
 889         }
 890
 891         /**
 892          * @brief Update existing item entries
 893          *
 894          * @param array $fields    The fields that are to be changed
 895          * @param array $condition The condition for finding the item entries
 896          *
 897          * In the future we may have to change permissions as well.
 898          * Then we had to add the user id as third parameter.
 899          *
 900          * A return value of "0" doesn't mean an error - but that 0 rows had been changed.
 901          *
 902          * @return integer|boolean number of affected rows - or "false" if there was an error
 903          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 904          */
 905         public static function update(array $fields, array $condition)
 906         {
 907                 if (empty($condition) || empty($fields)) {
 908                         return false;
 909                 }
 910
 911                 // To ensure the data integrity we do it in an transaction
 912                 DBA::transaction();
 913
 914                 // We cannot simply expand the condition to check for origin entries
 915                 // The condition needn't to be a simple array but could be a complex condition.
 916                 // And we have to execute this query before the update to ensure to fetch the same data.
 917                 $items = DBA::select('item', ['id', 'origin', 'uri', 'uri-id', 'iaid', 'icid', 'tag', 'file'], $condition);
 918
 919                 $content_fields = [];
 920                 foreach (array_merge(self::CONTENT_FIELDLIST, self::MIXED_CONTENT_FIELDLIST) as $field) {
 921                         if (isset($fields[$field])) {
 922                                 $content_fields[$field] = $fields[$field];
 923                                 if (in_array($field, self::CONTENT_FIELDLIST) || !self::isLegacyMode()) {
 924                                         unset($fields[$field]);
 925                                 } else {
 926                                         $fields[$field] = null;
 927                                 }
 928                         }
 929                 }
 930
 931                 $delivery_data = ItemDeliveryData::extractFields($fields);
 932
 933                 $clear_fields = ['bookmark', 'type', 'author-name', 'author-avatar', 'author-link', 'owner-name', 'owner-avatar', 'owner-link', 'postopts', 'inform'];
 934                 foreach ($clear_fields as $field) {
 935                         if (array_key_exists($field, $fields)) {
 936                                 $fields[$field] = null;
 937                         }
 938                 }
 939
 940                 if (array_key_exists('tag', $fields)) {
 941                         $tags = $fields['tag'];
 942                         $fields['tag'] = null;
 943                 } else {
 944                         $tags = null;
 945                 }
 946
 947                 if (array_key_exists('file', $fields)) {
 948                         $files = $fields['file'];
 949                         $fields['file'] = null;
 950                 } else {
 951                         $files = null;
 952                 }
 953
 954                 if (!empty($fields)) {
 955                         $success = DBA::update('item', $fields, $condition);
 956
 957                         if (!$success) {
 958                                 DBA::close($items);
 959                                 DBA::rollback();
 960                                 return false;
 961                         }
 962                 }
 963
 964                 // When there is no content for the "old" item table, this will count the fetched items
 965                 $rows = DBA::affectedRows();
 966
 967                 $notify_items = [];
 968
 969                 while ($item = DBA::fetch($items)) {
 970                         if (!empty($item['iaid']) || (!empty($content_fields['verb']) && (self::activityToIndex($content_fields['verb']) >= 0))) {
 971                                 self::updateActivity($content_fields, ['uri-id' => $item['uri-id']]);
 972
 973                                 if (empty($item['iaid'])) {
 974                                         $item_activity = DBA::selectFirst('item-activity', ['id'], ['uri-id' => $item['uri-id']]);
 975                                         if (DBA::isResult($item_activity)) {
 976                                                 $item_fields = ['iaid' => $item_activity['id'], 'icid' => null];
 977                                                 foreach (self::MIXED_CONTENT_FIELDLIST as $field) {
 978                                                         if (self::isLegacyMode()) {
 979                                                                 $item_fields[$field] = null;
 980                                                         } else {
 981                                                                 unset($item_fields[$field]);
 982                                                         }
 983                                                 }
 984                                                 DBA::update('item', $item_fields, ['id' => $item['id']]);
 985
 986                                                 if (!empty($item['icid']) && !DBA::exists('item', ['icid' => $item['icid']])) {
 987                                                         DBA::delete('item-content', ['id' => $item['icid']]);
 988                                                 }
 989                                         }
 990                                 } elseif (!empty($item['icid'])) {
 991                                         DBA::update('item', ['icid' => null], ['id' => $item['id']]);
 992
 993                                         if (!DBA::exists('item', ['icid' => $item['icid']])) {
 994                                                 DBA::delete('item-content', ['id' => $item['icid']]);
 995                                         }
 996                                 }
 997                         } else {
 998                                 self::updateContent($content_fields, ['uri-id' => $item['uri-id']]);
 999
1000                                 if (empty($item['icid'])) {
1001                                         $item_content = DBA::selectFirst('item-content', [], ['uri-id' => $item['uri-id']]);
1002                                         if (DBA::isResult($item_content)) {
1003                                                 $item_fields = ['icid' => $item_content['id']];
1004                                                 // Clear all fields in the item table that have a content in the item-content table
1005                                                 foreach ($item_content as $field => $content) {
1006                                                         if (in_array($field, self::MIXED_CONTENT_FIELDLIST) && !empty($item_content[$field])) {
1007                                                                 if (self::isLegacyMode()) {
1008                                                                         $item_fields[$field] = null;
1009                                                                 } else {
1010                                                                         unset($item_fields[$field]);
1011                                                                 }
1012                                                         }
1013                                                 }
1014                                                 DBA::update('item', $item_fields, ['id' => $item['id']]);
1015                                         }
1016                                 }
1017                         }
1018
1019                         if (!is_null($tags)) {
1020                                 Term::insertFromTagFieldByItemId($item['id'], $tags);
1021                                 if (!empty($item['tag'])) {
1022                                         DBA::update('item', ['tag' => ''], ['id' => $item['id']]);
1023                                 }
1024                         }
1025
1026                         if (!is_null($files)) {
1027                                 Term::insertFromFileFieldByItemId($item['id'], $files);
1028                                 if (!empty($item['file'])) {
1029                                         DBA::update('item', ['file' => ''], ['id' => $item['id']]);
1030                                 }
1031                         }
1032
1033                         ItemDeliveryData::update($item['id'], $delivery_data);
1034
1035                         self::updateThread($item['id']);
1036
1037                         // We only need to notfiy others when it is an original entry from us.
1038                         // Only call the notifier when the item has some content relevant change.
1039                         if ($item['origin'] && in_array('edited', array_keys($fields))) {
1040                                 $notify_items[] = $item['id'];
1041                         }
1042                 }
1043
1044                 DBA::close($items);
1045                 DBA::commit();
1046
1047                 foreach ($notify_items as $notify_item) {
1048                         Worker::add(PRIORITY_HIGH, "Notifier", Delivery::POST, $notify_item);
1049                 }
1050
1051                 return $rows;
1052         }
1053
1054         /**
1055          * @brief Delete an item and notify others about it - if it was ours
1056          *
1057          * @param array   $condition The condition for finding the item entries
1058          * @param integer $priority  Priority for the notification
1059          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1060          */
1061         public static function delete($condition, $priority = PRIORITY_HIGH)
1062         {
1063                 $items = self::select(['id'], $condition);
1064                 while ($item = self::fetch($items)) {
1065                         self::deleteById($item['id'], $priority);
1066                 }
1067                 DBA::close($items);
1068         }
1069
1070         /**
1071          * @brief Delete an item for an user and notify others about it - if it was ours
1072          *
1073          * @param array   $condition The condition for finding the item entries
1074          * @param integer $uid       User who wants to delete this item
1075          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1076          */
1077         public static function deleteForUser($condition, $uid)
1078         {
1079                 if ($uid == 0) {
1080                         return;
1081                 }
1082
1083                 $items = self::select(['id', 'uid'], $condition);
1084                 while ($item = self::fetch($items)) {
1085                         // "Deleting" global items just means hiding them
1086                         if ($item['uid'] == 0) {
1087                                 DBA::update('user-item', ['hidden' => true], ['iid' => $item['id'], 'uid' => $uid], true);
1088                         } elseif ($item['uid'] == $uid) {
1089                                 self::deleteById($item['id'], PRIORITY_HIGH);
1090                         } else {
1091                                 Logger::log('Wrong ownership. Not deleting item ' . $item['id']);
1092                         }
1093                 }
1094                 DBA::close($items);
1095         }
1096
1097         /**
1098          * @brief Delete an item and notify others about it - if it was ours
1099          *
1100          * @param integer $item_id  Item ID that should be delete
1101          * @param integer $priority Priority for the notification
1102          *
1103          * @return boolean success
1104          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1105          */
1106         public static function deleteById($item_id, $priority = PRIORITY_HIGH)
1107         {
1108                 // locate item to be deleted
1109                 $fields = ['id', 'uri', 'uid', 'parent', 'parent-uri', 'origin',
1110                         'deleted', 'file', 'resource-id', 'event-id', 'attach',
1111                         'verb', 'object-type', 'object', 'target', 'contact-id',
1112                         'icid', 'iaid', 'psid'];
1113                 $item = self::selectFirst($fields, ['id' => $item_id]);
1114                 if (!DBA::isResult($item)) {
1115                         Logger::log('Item with ID ' . $item_id . " hasn't been found.", Logger::DEBUG);
1116                         return false;
1117                 }
1118
1119                 if ($item['deleted']) {
1120                         Logger::log('Item with ID ' . $item_id . ' has already been deleted.', Logger::DEBUG);
1121                         return false;
1122                 }
1123
1124                 $parent = self::selectFirst(['origin'], ['id' => $item['parent']]);
1125                 if (!DBA::isResult($parent)) {
1126                         $parent = ['origin' => false];
1127                 }
1128
1129                 // clean up categories and tags so they don't end up as orphans
1130
1131                 $matches = false;
1132                 $cnt = preg_match_all('/<(.*?)>/', $item['file'], $matches, PREG_SET_ORDER);
1133
1134                 if ($cnt) {
1135                         foreach ($matches as $mtch) {
1136                                 FileTag::unsaveFile($item['uid'], $item['id'], $mtch[1],true);
1137                         }
1138                 }
1139
1140                 $matches = false;
1141
1142                 $cnt = preg_match_all('/\[(.*?)\]/', $item['file'], $matches, PREG_SET_ORDER);
1143
1144                 if ($cnt) {
1145                         foreach ($matches as $mtch) {
1146                                 FileTag::unsaveFile($item['uid'], $item['id'], $mtch[1],false);
1147                         }
1148                 }
1149
1150                 /*
1151                  * If item is a link to a photo resource, nuke all the associated photos
1152                  * (visitors will not have photo resources)
1153                  * This only applies to photos uploaded from the photos page. Photos inserted into a post do not
1154                  * generate a resource-id and therefore aren't intimately linked to the item.
1155                  */
1156                 /// @TODO: this should first check if photo is used elsewhere
1157                 if (strlen($item['resource-id'])) {
1158                         Photo::delete(['resource-id' => $item['resource-id'], 'uid' => $item['uid']]);
1159                 }
1160
1161                 // If item is a link to an event, delete the event.
1162                 if (intval($item['event-id'])) {
1163                         Event::delete($item['event-id']);
1164                 }
1165
1166                 // If item has attachments, drop them
1167                 /// @TODO: this should first check if attachment is used elsewhere
1168                 foreach (explode(",", $item['attach']) as $attach) {
1169                         preg_match("|attach/(\d+)|", $attach, $matches);
1170                         if (is_array($matches) && count($matches) > 1) {
1171                                 Attach::delete(['id' => $matches[1], 'uid' => $item['uid']]);
1172                         }
1173                 }
1174
1175                 // Delete tags that had been attached to other items
1176                 self::deleteTagsFromItem($item);
1177
1178                 // Set the item to "deleted"
1179                 $item_fields = ['deleted' => true, 'edited' => DateTimeFormat::utcNow(), 'changed' => DateTimeFormat::utcNow()];
1180                 DBA::update('item', $item_fields, ['id' => $item['id']]);
1181
1182                 Term::insertFromTagFieldByItemId($item['id'], '');
1183                 Term::insertFromFileFieldByItemId($item['id'], '');
1184                 self::deleteThread($item['id'], $item['parent-uri']);
1185
1186                 if (!self::exists(["`uri` = ? AND `uid` != 0 AND NOT `deleted`", $item['uri']])) {
1187                         self::delete(['uri' => $item['uri'], 'uid' => 0, 'deleted' => false], $priority);
1188                 }
1189
1190                 ItemDeliveryData::delete($item['id']);
1191
1192                 // We don't delete the item-activity here, since we need some of the data for ActivityPub
1193
1194                 if (!empty($item['icid']) && !self::exists(['icid' => $item['icid'], 'deleted' => false])) {
1195                         DBA::delete('item-content', ['id' => $item['icid']], ['cascade' => false]);
1196                 }
1197                 // When the permission set will be used in photo and events as well,
1198                 // this query here needs to be extended.
1199                 // @todo Currently deactivated. We need the permission set in the deletion process.
1200                 // This is a reminder to add the removal somewhere else.
1201                 //if (!empty($item['psid']) && !self::exists(['psid' => $item['psid'], 'deleted' => false])) {
1202                 //      DBA::delete('permissionset', ['id' => $item['psid']], ['cascade' => false]);
1203                 //}
1204
1205                 // If it's the parent of a comment thread, kill all the kids
1206                 if ($item['id'] == $item['parent']) {
1207                         self::delete(['parent' => $item['parent'], 'deleted' => false], $priority);
1208                 }
1209
1210                 // Is it our comment and/or our thread?
1211                 if ($item['origin'] || $parent['origin']) {
1212
1213                         // When we delete the original post we will delete all existing copies on the server as well
1214                         self::delete(['uri' => $item['uri'], 'deleted' => false], $priority);
1215
1216                         // send the notification upstream/downstream
1217                         Worker::add(['priority' => $priority, 'dont_fork' => true], "Notifier", Delivery::DELETION, intval($item['id']));
1218                 } elseif ($item['uid'] != 0) {
1219
1220                         // When we delete just our local user copy of an item, we have to set a marker to hide it
1221                         $global_item = self::selectFirst(['id'], ['uri' => $item['uri'], 'uid' => 0, 'deleted' => false]);
1222                         if (DBA::isResult($global_item)) {
1223                                 DBA::update('user-item', ['hidden' => true], ['iid' => $global_item['id'], 'uid' => $item['uid']], true);
1224                         }
1225                 }
1226
1227                 Logger::log('Item with ID ' . $item_id . " has been deleted.", Logger::DEBUG);
1228
1229                 return true;
1230         }
1231
1232         private static function deleteTagsFromItem($item)
1233         {
1234                 if (($item["verb"] != Activity::TAG) || ($item["object-type"] != Activity\ObjectType::TAGTERM)) {
1235                         return;
1236                 }
1237
1238                 $xo = XML::parseString($item["object"], false);
1239                 $xt = XML::parseString($item["target"], false);
1240
1241                 if ($xt->type != Activity\ObjectType::NOTE) {
1242                         return;
1243                 }
1244
1245                 $i = self::selectFirst(['id', 'contact-id', 'tag'], ['uri' => $xt->id, 'uid' => $item['uid']]);
1246                 if (!DBA::isResult($i)) {
1247                         return;
1248                 }
1249
1250                 // For tags, the owner cannot remove the tag on the author's copy of the post.
1251                 $owner_remove = ($item["contact-id"] == $i["contact-id"]);
1252                 $author_copy = $item["origin"];
1253
1254                 if (($owner_remove && $author_copy) || !$owner_remove) {
1255                         return;
1256                 }
1257
1258                 $tags = explode(',', $i["tag"]);
1259                 $newtags = [];
1260                 if (count($tags)) {
1261                         foreach ($tags as $tag) {
1262                                 if (trim($tag) !== trim($xo->body)) {
1263                                        $newtags[] = trim($tag);
1264                                 }
1265                         }
1266                 }
1267                 self::update(['tag' => implode(',', $newtags)], ['id' => $i["id"]]);
1268         }
1269
1270         private static function guid($item, $notify)
1271         {
1272                 if (!empty($item['guid'])) {
1273                         return Strings::escapeTags(trim($item['guid']));
1274                 }
1275
1276                 if ($notify) {
1277                         // We have to avoid duplicates. So we create the GUID in form of a hash of the plink or uri.
1278                         // We add the hash of our own host because our host is the original creator of the post.
1279                         $prefix_host = \get_app()->getHostName();
1280                 } else {
1281                         $prefix_host = '';
1282
1283                         // We are only storing the post so we create a GUID from the original hostname.
1284                         if (!empty($item['author-link'])) {
1285                                 $parsed = parse_url($item['author-link']);
1286                                 if (!empty($parsed['host'])) {
1287                                         $prefix_host = $parsed['host'];
1288                                 }
1289                         }
1290
1291                         if (empty($prefix_host) && !empty($item['plink'])) {
1292                                 $parsed = parse_url($item['plink']);
1293                                 if (!empty($parsed['host'])) {
1294                                         $prefix_host = $parsed['host'];
1295                                 }
1296                         }
1297
1298                         if (empty($prefix_host) && !empty($item['uri'])) {
1299                                 $parsed = parse_url($item['uri']);
1300                                 if (!empty($parsed['host'])) {
1301                                         $prefix_host = $parsed['host'];
1302                                 }
1303                         }
1304
1305                         // Is it in the format data@host.tld? - Used for mail contacts
1306                         if (empty($prefix_host) && !empty($item['author-link']) && strstr($item['author-link'], '@')) {
1307                                 $mailparts = explode('@', $item['author-link']);
1308                                 $prefix_host = array_pop($mailparts);
1309                         }
1310                 }
1311
1312                 if (!empty($item['plink'])) {
1313                         $guid = self::guidFromUri($item['plink'], $prefix_host);
1314                 } elseif (!empty($item['uri'])) {
1315                         $guid = self::guidFromUri($item['uri'], $prefix_host);
1316                 } else {
1317                         $guid = System::createUUID(hash('crc32', $prefix_host));
1318                 }
1319
1320                 return $guid;
1321         }
1322
1323         private static function contactId($item)
1324         {
1325                 if (!empty($item['contact-id']) && DBA::exists('contact', ['self' => true, 'id' => $item['contact-id']])) {
1326                         return $item['contact-id'];
1327                 } elseif (($item['gravity'] == GRAVITY_PARENT) && !empty($item['uid']) && !empty($item['contact-id']) && Contact::isSharing($item['contact-id'], $item['uid'])) {
1328                         return $item['contact-id'];
1329                 } elseif (!empty($item['uid']) && !Contact::isSharing($item['author-id'], $item['uid'])) {
1330                         return $item['author-id'];
1331                 } elseif (!empty($item['contact-id'])) {
1332                         return $item['contact-id'];
1333                 } else {
1334                         $contact_id = Contact::getIdForURL($item['author-link'], $item['uid']);
1335                         if (!empty($contact_id)) {
1336                                 return $contact_id;
1337                         }
1338                 }
1339                 return $item['author-id'];
1340         }
1341
1342         // This function will finally cover most of the preparation functionality in mod/item.php
1343         public static function prepare(&$item)
1344         {
1345                 /*
1346                  * @TODO: Unused code triggering inspection errors
1347                  *
1348                 $data = BBCode::getAttachmentData($item['body']);
1349                 if ((preg_match_all("/\[bookmark\=([^\]]*)\](.*?)\[\/bookmark\]/ism", $item['body'], $match, PREG_SET_ORDER) || isset($data["type"]))
1350                         && ($posttype != Item::PT_PERSONAL_NOTE)) {
1351                         $posttype = Item::PT_PAGE;
1352                         $objecttype = ACTIVITY_OBJ_BOOKMARK;
1353                 }
1354                  */
1355         }
1356
1357         /**
1358          * Write an item array into a spool file to be inserted later.
1359          * This command is called whenever there are issues storing an item.
1360          *
1361          * @param array $item The item fields that are to be inserted
1362          * @throws \Exception
1363          */
1364         private static function spool($orig_item)
1365         {
1366                 // Now we store the data in the spool directory
1367                 // We use "microtime" to keep the arrival order and "mt_rand" to avoid duplicates
1368                 $file = 'item-' . round(microtime(true) * 10000) . '-' . mt_rand() . '.msg';
1369
1370                 $spoolpath = get_spoolpath();
1371                 if ($spoolpath != "") {
1372                         $spool = $spoolpath . '/' . $file;
1373
1374                         file_put_contents($spool, json_encode($orig_item));
1375                         Logger::warning("Item wasn't stored - Item was spooled into file", ['file' => $file]);
1376                 }
1377         }
1378
1379         public static function insert($item, $force_parent = false, $notify = false, $dontcache = false)
1380         {
1381                 $orig_item = $item;
1382
1383                 $priority = PRIORITY_HIGH;
1384
1385                 // If it is a posting where users should get notifications, then define it as wall posting
1386                 if ($notify) {
1387                         $item['wall'] = 1;
1388                         $item['origin'] = 1;
1389                         $item['network'] = Protocol::DFRN;
1390                         $item['protocol'] = Conversation::PARCEL_DFRN;
1391
1392                         if (is_int($notify)) {
1393                                 $priority = $notify;
1394                         }
1395                 } else {
1396                         $item['network'] = trim(($item['network'] ?? '') ?: Protocol::PHANTOM);
1397                 }
1398
1399                 $item['guid'] = self::guid($item, $notify);
1400                 $item['uri'] = Strings::escapeTags(trim(($item['uri'] ?? '') ?: self::newURI($item['uid'], $item['guid'])));
1401
1402                 // Store URI data
1403                 $item['uri-id'] = ItemURI::insert(['uri' => $item['uri'], 'guid' => $item['guid']]);
1404
1405                 // Store conversation data
1406                 $item = Conversation::insert($item);
1407
1408                 /*
1409                  * If a Diaspora signature structure was passed in, pull it out of the
1410                  * item array and set it aside for later storage.
1411                  */
1412
1413                 $dsprsig = null;
1414                 if (isset($item['dsprsig'])) {
1415                         $encoded_signature = $item['dsprsig'];
1416                         $dsprsig = json_decode(base64_decode($item['dsprsig']));
1417                         unset($item['dsprsig']);
1418                 }
1419
1420                 $diaspora_signed_text = '';
1421                 if (isset($item['diaspora_signed_text'])) {
1422                         $diaspora_signed_text = $item['diaspora_signed_text'];
1423                         unset($item['diaspora_signed_text']);
1424                 }
1425
1426                 // Converting the plink
1427                 /// @TODO Check if this is really still needed
1428                 if ($item['network'] == Protocol::OSTATUS) {
1429                         if (isset($item['plink'])) {
1430                                 $item['plink'] = OStatus::convertHref($item['plink']);
1431                         } elseif (isset($item['uri'])) {
1432                                 $item['plink'] = OStatus::convertHref($item['uri']);
1433                         }
1434                 }
1435
1436                 if (!empty($item['thr-parent'])) {
1437                         $item['parent-uri'] = $item['thr-parent'];
1438                 }
1439
1440                 /** @var Activity $activity */
1441                 $activity = self::getClass(Activity::class);
1442
1443                 if (isset($item['gravity'])) {
1444                         $item['gravity'] = intval($item['gravity']);
1445                 } elseif ($item['parent-uri'] === $item['uri']) {
1446                         $item['gravity'] = GRAVITY_PARENT;
1447                 } elseif ($activity->match($item['verb'], Activity::POST)) {
1448                         $item['gravity'] = GRAVITY_COMMENT;
1449                 } elseif ($activity->match($item['verb'], Activity::FOLLOW)) {
1450                         $item['gravity'] = GRAVITY_ACTIVITY;
1451                 } else {
1452                         $item['gravity'] = GRAVITY_UNKNOWN;   // Should not happen
1453                         Logger::log('Unknown gravity for verb: ' . $item['verb'], Logger::DEBUG);
1454                 }
1455
1456                 $uid = intval($item['uid']);
1457
1458                 // check for create date and expire time
1459                 $expire_interval = Config::get('system', 'dbclean-expire-days', 0);
1460
1461                 $user = DBA::selectFirst('user', ['expire'], ['uid' => $uid]);
1462                 if (DBA::isResult($user) && ($user['expire'] > 0) && (($user['expire'] < $expire_interval) || ($expire_interval == 0))) {
1463                         $expire_interval = $user['expire'];
1464                 }
1465
1466                 if (($expire_interval > 0) && !empty($item['created'])) {
1467                         $expire_date = time() - ($expire_interval * 86400);
1468                         $created_date = strtotime($item['created']);
1469                         if ($created_date < $expire_date) {
1470                                 Logger::notice('Item created before expiration interval.', [
1471                                         'created' => date('c', $created_date),
1472                                         'expired' => date('c', $expire_date),
1473                                         '$item' => $item
1474                                 ]);
1475                                 return 0;
1476                         }
1477                 }
1478
1479                 /*
1480                  * Do we already have this item?
1481                  * We have to check several networks since Friendica posts could be repeated
1482                  * via OStatus (maybe Diasporsa as well)
1483                  */
1484                 if (empty($item['network']) || in_array($item['network'], Protocol::FEDERATED)) {
1485                         $condition = ["`uri` = ? AND `uid` = ? AND `network` IN (?, ?, ?, ?)",
1486                                 trim($item['uri']), $item['uid'],
1487                                 Protocol::ACTIVITYPUB, Protocol::DIASPORA, Protocol::DFRN, Protocol::OSTATUS];
1488                         $existing = self::selectFirst(['id', 'network'], $condition);
1489                         if (DBA::isResult($existing)) {
1490                                 // We only log the entries with a different user id than 0. Otherwise we would have too many false positives
1491                                 if ($uid != 0) {
1492                                         Logger::notice('Item already existed for user', [
1493                                                 'uri' => $item['uri'],
1494                                                 'uid' => $uid,
1495                                                 'network' => $item['network'],
1496                                                 'existing_id' => $existing["id"],
1497                                                 'existing_network' => $existing["network"]
1498                                         ]);
1499                                 }
1500
1501                                 return $existing["id"];
1502                         }
1503                 }
1504
1505                 $item['wall']          = intval($item['wall'] ?? 0);
1506                 $item['extid']         = trim($item['extid'] ?? '');
1507                 $item['author-name']   = trim($item['author-name'] ?? '');
1508                 $item['author-link']   = trim($item['author-link'] ?? '');
1509                 $item['author-avatar'] = trim($item['author-avatar'] ?? '');
1510                 $item['owner-name']    = trim($item['owner-name'] ?? '');
1511                 $item['owner-link']    = trim($item['owner-link'] ?? '');
1512                 $item['owner-avatar']  = trim($item['owner-avatar'] ?? '');
1513                 $item['received']      = (isset($item['received'])  ? DateTimeFormat::utc($item['received'])  : DateTimeFormat::utcNow());
1514                 $item['created']       = (isset($item['created'])   ? DateTimeFormat::utc($item['created'])   : $item['received']);
1515                 $item['edited']        = (isset($item['edited'])    ? DateTimeFormat::utc($item['edited'])    : $item['created']);
1516                 $item['changed']       = (isset($item['changed'])   ? DateTimeFormat::utc($item['changed'])   : $item['created']);
1517                 $item['commented']     = (isset($item['commented']) ? DateTimeFormat::utc($item['commented']) : $item['created']);
1518                 $item['title']         = trim($item['title'] ?? '');
1519                 $item['location']      = trim($item['location'] ?? '');
1520                 $item['coord']         = trim($item['coord'] ?? '');
1521                 $item['visible']       = (isset($item['visible']) ? intval($item['visible']) : 1);
1522                 $item['deleted']       = 0;
1523                 $item['parent-uri']    = trim(($item['parent-uri'] ?? '') ?: $item['uri']);
1524                 $item['post-type']     = ($item['post-type'] ?? '') ?: self::PT_ARTICLE;
1525                 $item['verb']          = trim($item['verb'] ?? '');
1526                 $item['object-type']   = trim($item['object-type'] ?? '');
1527                 $item['object']        = trim($item['object'] ?? '');
1528                 $item['target-type']   = trim($item['target-type'] ?? '');
1529                 $item['target']        = trim($item['target'] ?? '');
1530                 $item['plink']         = trim($item['plink'] ?? '');
1531                 $item['allow_cid']     = trim($item['allow_cid'] ?? '');
1532                 $item['allow_gid']     = trim($item['allow_gid'] ?? '');
1533                 $item['deny_cid']      = trim($item['deny_cid'] ?? '');
1534                 $item['deny_gid']      = trim($item['deny_gid'] ?? '');
1535                 $item['private']       = intval($item['private'] ?? 0);
1536                 $item['body']          = trim($item['body'] ?? '');
1537                 $item['tag']           = trim($item['tag'] ?? '');
1538                 $item['attach']        = trim($item['attach'] ?? '');
1539                 $item['app']           = trim($item['app'] ?? '');
1540                 $item['origin']        = intval($item['origin'] ?? 0);
1541                 $item['postopts']      = trim($item['postopts'] ?? '');
1542                 $item['resource-id']   = trim($item['resource-id'] ?? '');
1543                 $item['event-id']      = intval($item['event-id'] ?? 0);
1544                 $item['inform']        = trim($item['inform'] ?? '');
1545                 $item['file']          = trim($item['file'] ?? '');
1546
1547                 // When there is no content then we don't post it
1548                 if ($item['body'].$item['title'] == '') {
1549                         Logger::notice('No body, no title.');
1550                         return 0;
1551                 }
1552
1553                 self::addLanguageToItemArray($item);
1554
1555                 // Items cannot be stored before they happen ...
1556                 if ($item['created'] > DateTimeFormat::utcNow()) {
1557                         $item['created'] = DateTimeFormat::utcNow();
1558                 }
1559
1560                 // We haven't invented time travel by now.
1561                 if ($item['edited'] > DateTimeFormat::utcNow()) {
1562                         $item['edited'] = DateTimeFormat::utcNow();
1563                 }
1564
1565                 $item['plink'] = ($item['plink'] ?? '') ?: System::baseUrl() . '/display/' . urlencode($item['guid']);
1566
1567                 $default = ['url' => $item['author-link'], 'name' => $item['author-name'],
1568                         'photo' => $item['author-avatar'], 'network' => $item['network']];
1569
1570                 $item['author-id'] = ($item['author-id'] ?? 0) ?: Contact::getIdForURL($item['author-link'], 0, false, $default);
1571
1572                 if (Contact::isBlocked($item['author-id'])) {
1573                         Logger::notice('Author is blocked node-wide', ['author-link' => $item['author-link'], 'item-uri' => $item['uri']]);
1574                         return 0;
1575                 }
1576
1577                 if (!empty($item['author-link']) && Network::isUrlBlocked($item['author-link'])) {
1578                         Logger::notice('Author server is blocked', ['author-link' => $item['author-link'], 'item-uri' => $item['uri']]);
1579                         return 0;
1580                 }
1581
1582                 if (!empty($uid) && Contact::isBlockedByUser($item['author-id'], $uid)) {
1583                         Logger::notice('Author is blocked by user', ['author-link' => $item['author-link'], 'uid' => $uid, 'item-uri' => $item['uri']]);
1584                         return 0;
1585                 }
1586
1587                 $default = ['url' => $item['owner-link'], 'name' => $item['owner-name'],
1588                         'photo' => $item['owner-avatar'], 'network' => $item['network']];
1589
1590                 $item['owner-id'] = ($item['owner-id'] ?? 0) ?: Contact::getIdForURL($item['owner-link'], 0, false, $default);
1591
1592                 if (Contact::isBlocked($item['owner-id'])) {
1593                         Logger::notice('Owner is blocked node-wide', ['owner-link' => $item['owner-link'], 'item-uri' => $item['uri']]);
1594                         return 0;
1595                 }
1596
1597                 if (!empty($item['owner-link']) && Network::isUrlBlocked($item['owner-link'])) {
1598                         Logger::notice('Owner server is blocked', ['owner-link' => $item['owner-link'], 'item-uri' => $item['uri']]);
1599                         return 0;
1600                 }
1601
1602                 if (!empty($uid) && Contact::isBlockedByUser($item['owner-id'], $uid)) {
1603                         Logger::notice('Owner is blocked by user', ['owner-link' => $item['owner-link'], 'uid' => $uid, 'item-uri' => $item['uri']]);
1604                         return 0;
1605                 }
1606
1607                 // The causer is set during a thread completion, for example because of a reshare. It countains the responsible actor.
1608                 if (!empty($uid) && !empty($item['causer-id']) && Contact::isBlockedByUser($item['causer-id'], $uid)) {
1609                         Logger::notice('Causer is blocked by user', ['causer-link' => $item['causer-link'], 'uid' => $uid, 'item-uri' => $item['uri']]);
1610                         return 0;
1611                 }
1612
1613                 if (!empty($uid) && !empty($item['causer-id']) && ($item['parent-uri'] == $item['uri']) && Contact::isIgnoredByUser($item['causer-id'], $uid)) {
1614                         Logger::notice('Causer is ignored by user', ['causer-link' => $item['causer-link'], 'uid' => $uid, 'item-uri' => $item['uri']]);
1615                         return 0;
1616                 }
1617
1618                 // We don't store the causer, we only have it here for the checks above
1619                 unset($item['causer-id']);
1620                 unset($item['causer-link']);
1621
1622                 // The contact-id should be set before "self::insert" was called - but there seems to be issues sometimes
1623                 $item["contact-id"] = self::contactId($item);
1624
1625                 if ($item['network'] == Protocol::PHANTOM) {
1626                         $item['network'] = Protocol::DFRN;
1627                         Logger::notice('Missing network, setting to {network}.', [
1628                                 'uri' => $item["uri"],
1629                                 'network' => $item['network'],
1630                                 'callstack' => System::callstack()
1631                         ]);
1632                 }
1633
1634                 // Checking if there is already an item with the same guid
1635                 $condition = ['guid' => $item['guid'], 'network' => $item['network'], 'uid' => $item['uid']];
1636                 if (self::exists($condition)) {
1637                         Logger::notice('Found already existing item', [
1638                                 'guid' => $item['guid'],
1639                                 'uid' => $item['uid'],
1640                                 'network' => $item['network']
1641                         ]);
1642                         return 0;
1643                 }
1644
1645                 if ($item['verb'] == Activity::FOLLOW) {
1646                         if (!$item['origin'] && ($item['author-id'] == Contact::getPublicIdByUserId($uid))) {
1647                                 // Our own follow request can be relayed to us. We don't store it to avoid notification chaos.
1648                                 Logger::log("Follow: Don't store not origin follow request from us for " . $item['parent-uri'], Logger::DEBUG);
1649                                 return 0;
1650                         }
1651
1652                         $condition = ['verb' => Activity::FOLLOW, 'uid' => $item['uid'],
1653                                 'parent-uri' => $item['parent-uri'], 'author-id' => $item['author-id']];
1654                         if (self::exists($condition)) {
1655                                 // It happens that we receive multiple follow requests by the same author - we only store one.
1656                                 Logger::log('Follow: Found existing follow request from author ' . $item['author-id'] . ' for ' . $item['parent-uri'], Logger::DEBUG);
1657                                 return 0;
1658                         }
1659                 }
1660
1661                 // Check for hashtags in the body and repair or add hashtag links
1662                 self::setHashtags($item);
1663
1664                 $item['thr-parent'] = $item['parent-uri'];
1665
1666                 $notify_type = Delivery::POST;
1667                 $allow_cid = '';
1668                 $allow_gid = '';
1669                 $deny_cid  = '';
1670                 $deny_gid  = '';
1671
1672                 if ($item['parent-uri'] === $item['uri']) {
1673                         $parent_id = 0;
1674                         $parent_deleted = 0;
1675                         $allow_cid = $item['allow_cid'];
1676                         $allow_gid = $item['allow_gid'];
1677                         $deny_cid  = $item['deny_cid'];
1678                         $deny_gid  = $item['deny_gid'];
1679                 } else {
1680                         // find the parent and snarf the item id and ACLs
1681                         // and anything else we need to inherit
1682
1683                         $fields = ['uri', 'parent-uri', 'id', 'deleted',
1684                                 'allow_cid', 'allow_gid', 'deny_cid', 'deny_gid',
1685                                 'wall', 'private', 'forum_mode', 'origin'];
1686                         $condition = ['uri' => $item['parent-uri'], 'uid' => $item['uid']];
1687                         $params = ['order' => ['id' => false]];
1688                         $parent = self::selectFirst($fields, $condition, $params);
1689
1690                         if (DBA::isResult($parent)) {
1691                                 // is the new message multi-level threaded?
1692                                 // even though we don't support it now, preserve the info
1693                                 // and re-attach to the conversation parent.
1694
1695                                 if ($parent['uri'] != $parent['parent-uri']) {
1696                                         $item['parent-uri'] = $parent['parent-uri'];
1697
1698                                         $condition = ['uri' => $item['parent-uri'],
1699                                                 'parent-uri' => $item['parent-uri'],
1700                                                 'uid' => $item['uid']];
1701                                         $params = ['order' => ['id' => false]];
1702                                         $toplevel_parent = self::selectFirst($fields, $condition, $params);
1703
1704                                         if (DBA::isResult($toplevel_parent)) {
1705                                                 $parent = $toplevel_parent;
1706                                         }
1707                                 }
1708
1709                                 $parent_id      = $parent['id'];
1710                                 $parent_deleted = $parent['deleted'];
1711                                 $allow_cid      = $parent['allow_cid'];
1712                                 $allow_gid      = $parent['allow_gid'];
1713                                 $deny_cid       = $parent['deny_cid'];
1714                                 $deny_gid       = $parent['deny_gid'];
1715                                 $item['wall']   = $parent['wall'];
1716
1717                                 /*
1718                                  * If the parent is private, force privacy for the entire conversation
1719                                  * This differs from the above settings as it subtly allows comments from
1720                                  * email correspondents to be private even if the overall thread is not.
1721                                  */
1722                                 if ($parent['private']) {
1723                                         $item['private'] = $parent['private'];
1724                                 }
1725
1726                                 /*
1727                                  * Edge case. We host a public forum that was originally posted to privately.
1728                                  * The original author commented, but as this is a comment, the permissions
1729                                  * weren't fixed up so it will still show the comment as private unless we fix it here.
1730                                  */
1731                                 if ((intval($parent['forum_mode']) == 1) && $parent['private']) {
1732                                         $item['private'] = 0;
1733                                 }
1734
1735                                 // If its a post that originated here then tag the thread as "mention"
1736                                 if ($item['origin'] && $item['uid']) {
1737                                         DBA::update('thread', ['mention' => true], ['iid' => $parent_id]);
1738                                         Logger::log('tagged thread ' . $parent_id . ' as mention for user ' . $item['uid'], Logger::DEBUG);
1739                                 }
1740                         } else {
1741                                 /*
1742                                  * Allow one to see reply tweets from status.net even when
1743                                  * we don't have or can't see the original post.
1744                                  */
1745                                 if ($force_parent) {
1746                                         Logger::log('$force_parent=true, reply converted to top-level post.');
1747                                         $parent_id = 0;
1748                                         $item['parent-uri'] = $item['uri'];
1749                                         $item['gravity'] = GRAVITY_PARENT;
1750                                 } else {
1751                                         Logger::log('item parent '.$item['parent-uri'].' for '.$item['uid'].' was not found - ignoring item');
1752                                         return 0;
1753                                 }
1754
1755                                 $parent_deleted = 0;
1756                         }
1757                 }
1758
1759                 if (stristr($item['verb'], Activity::POKE)) {
1760                         $notify_type = Delivery::POKE;
1761                 }
1762
1763                 $item['parent-uri-id'] = ItemURI::getIdByURI($item['parent-uri']);
1764                 $item['thr-parent-id'] = ItemURI::getIdByURI($item['thr-parent']);
1765
1766                 $condition = ["`uri` = ? AND `network` IN (?, ?) AND `uid` = ?",
1767                         $item['uri'], $item['network'], Protocol::DFRN, $item['uid']];
1768                 if (self::exists($condition)) {
1769                         Logger::log('duplicated item with the same uri found. '.print_r($item,true));
1770                         return 0;
1771                 }
1772
1773                 // On Friendica and Diaspora the GUID is unique
1774                 if (in_array($item['network'], [Protocol::DFRN, Protocol::DIASPORA])) {
1775                         $condition = ['guid' => $item['guid'], 'uid' => $item['uid']];
1776                         if (self::exists($condition)) {
1777                                 Logger::log('duplicated item with the same guid found. '.print_r($item,true));
1778                                 return 0;
1779                         }
1780                 } elseif ($item['network'] == Protocol::OSTATUS) {
1781                         // Check for an existing post with the same content. There seems to be a problem with OStatus.
1782                         $condition = ["`body` = ? AND `network` = ? AND `created` = ? AND `contact-id` = ? AND `uid` = ?",
1783                                         $item['body'], $item['network'], $item['created'], $item['contact-id'], $item['uid']];
1784                         if (self::exists($condition)) {
1785                                 Logger::log('duplicated item with the same body found. '.print_r($item,true));
1786                                 return 0;
1787                         }
1788                 }
1789
1790                 // Is this item available in the global items (with uid=0)?
1791                 if ($item["uid"] == 0) {
1792                         $item["global"] = true;
1793
1794                         // Set the global flag on all items if this was a global item entry
1795                         DBA::update('item', ['global' => true], ['uri' => $item["uri"]]);
1796                 } else {
1797                         $item["global"] = self::exists(['uid' => 0, 'uri' => $item["uri"]]);
1798                 }
1799
1800                 // ACL settings
1801                 if (strlen($allow_cid) || strlen($allow_gid) || strlen($deny_cid) || strlen($deny_gid)) {
1802                         $private = 1;
1803                 } else {
1804                         $private = $item['private'];
1805                 }
1806
1807                 $item["allow_cid"] = $allow_cid;
1808                 $item["allow_gid"] = $allow_gid;
1809                 $item["deny_cid"] = $deny_cid;
1810                 $item["deny_gid"] = $deny_gid;
1811                 $item["private"] = $private;
1812                 $item["deleted"] = $parent_deleted;
1813
1814                 // Fill the cache field
1815                 self::putInCache($item);
1816
1817                 if ($notify) {
1818                         $item['edit'] = false;
1819                         $item['parent'] = $parent_id;
1820                         Hook::callAll('post_local', $item);
1821                         unset($item['edit']);
1822                         unset($item['parent']);
1823                 } else {
1824                         Hook::callAll('post_remote', $item);
1825                 }
1826
1827                 // This array field is used to trigger some automatic reactions
1828                 // It is mainly used in the "post_local" hook.
1829                 unset($item['api_source']);
1830
1831                 if (!empty($item['cancel'])) {
1832                         Logger::log('post cancelled by addon.');
1833                         return 0;
1834                 }
1835
1836                 /*
1837                  * Check for already added items.
1838                  * There is a timing issue here that sometimes creates double postings.
1839                  * An unique index would help - but the limitations of MySQL (maximum size of index values) prevent this.
1840                  */
1841                 if ($item["uid"] == 0) {
1842                         if (self::exists(['uri' => trim($item['uri']), 'uid' => 0])) {
1843                                 Logger::log('Global item already stored. URI: '.$item['uri'].' on network '.$item['network'], Logger::DEBUG);
1844                                 return 0;
1845                         }
1846                 }
1847
1848                 Logger::log('' . print_r($item,true), Logger::DATA);
1849
1850                 if (array_key_exists('tag', $item)) {
1851                         $tags = $item['tag'];
1852                         unset($item['tag']);
1853                 } else {
1854                         $tags = '';
1855                 }
1856
1857                 if (array_key_exists('file', $item)) {
1858                         $files = $item['file'];
1859                         unset($item['file']);
1860                 } else {
1861                         $files = '';
1862                 }
1863
1864                 // Creates or assigns the permission set
1865                 $item['psid'] = PermissionSet::fetchIDForPost($item);
1866
1867                 // We are doing this outside of the transaction to avoid timing problems
1868                 if (!self::insertActivity($item)) {
1869                         self::insertContent($item);
1870                 }
1871
1872                 $delivery_data = ItemDeliveryData::extractFields($item);
1873
1874                 unset($item['postopts']);
1875                 unset($item['inform']);
1876
1877                 // These fields aren't stored anymore in the item table, they are fetched upon request
1878                 unset($item['author-link']);
1879                 unset($item['author-name']);
1880                 unset($item['author-avatar']);
1881                 unset($item['author-network']);
1882
1883                 unset($item['owner-link']);
1884                 unset($item['owner-name']);
1885                 unset($item['owner-avatar']);
1886
1887                 $like_no_comment = Config::get('system', 'like_no_comment');
1888
1889                 DBA::transaction();
1890                 $ret = DBA::insert('item', $item);
1891
1892                 // When the item was successfully stored we fetch the ID of the item.
1893                 if (DBA::isResult($ret)) {
1894                         $current_post = DBA::lastInsertId();
1895                 } else {
1896                         // This can happen - for example - if there are locking timeouts.
1897                         DBA::rollback();
1898
1899                         // Store the data into a spool file so that we can try again later.
1900                         self::spool($orig_item);
1901                         return 0;
1902                 }
1903
1904                 if ($current_post == 0) {
1905                         // This is one of these error messages that never should occur.
1906                         Logger::log("couldn't find created item - we better quit now.");
1907                         DBA::rollback();
1908                         return 0;
1909                 }
1910
1911                 // How much entries have we created?
1912                 // We wouldn't need this query when we could use an unique index - but MySQL has length problems with them.
1913                 $entries = DBA::count('item', ['uri' => $item['uri'], 'uid' => $item['uid'], 'network' => $item['network']]);
1914
1915                 if ($entries > 1) {
1916                         // There are duplicates. We delete our just created entry.
1917                         Logger::log('Duplicated post occurred. uri = ' . $item['uri'] . ' uid = ' . $item['uid']);
1918
1919                         // Yes, we could do a rollback here - but we are having many users with MyISAM.
1920                         DBA::delete('item', ['id' => $current_post]);
1921                         DBA::commit();
1922                         return 0;
1923                 } elseif ($entries == 0) {
1924                         // This really should never happen since we quit earlier if there were problems.
1925                         Logger::log("Something is terribly wrong. We haven't found our created entry.");
1926                         DBA::rollback();
1927                         return 0;
1928                 }
1929
1930                 Logger::log('created item '.$current_post);
1931
1932                 if (!$parent_id || ($item['parent-uri'] === $item['uri'])) {
1933                         $parent_id = $current_post;
1934                 }
1935
1936                 // Set parent id
1937                 DBA::update('item', ['parent' => $parent_id], ['id' => $current_post]);
1938
1939                 $item['id'] = $current_post;
1940                 $item['parent'] = $parent_id;
1941
1942                 // update the commented timestamp on the parent
1943                 // Only update "commented" if it is really a comment
1944                 if (($item['gravity'] != GRAVITY_ACTIVITY) || !$like_no_comment) {
1945                         DBA::update('item', ['commented' => DateTimeFormat::utcNow(), 'changed' => DateTimeFormat::utcNow()], ['id' => $parent_id]);
1946                 } else {
1947                         DBA::update('item', ['changed' => DateTimeFormat::utcNow()], ['id' => $parent_id]);
1948                 }
1949
1950                 if ($dsprsig) {
1951                         /*
1952                          * Friendica servers lower than 3.4.3-2 had double encoded the signature ...
1953                          * We can check for this condition when we decode and encode the stuff again.
1954                          */
1955                         if (base64_encode(base64_decode(base64_decode($dsprsig->signature))) == base64_decode($dsprsig->signature)) {
1956                                 $dsprsig->signature = base64_decode($dsprsig->signature);
1957                                 Logger::log("Repaired double encoded signature from handle ".$dsprsig->signer, Logger::DEBUG);
1958                         }
1959
1960                         if (!empty($dsprsig->signed_text) && empty($dsprsig->signature) && empty($dsprsig->signer)) {
1961                                 DBA::insert('diaspora-interaction', ['uri-id' => $item['uri-id'], 'interaction' => $dsprsig->signed_text], true);
1962                         } else {
1963                                 // The other fields are used by very old Friendica servers, so we currently store them differently
1964                                 DBA::insert('sign', ['iid' => $current_post, 'signed_text' => $dsprsig->signed_text,
1965                                         'signature' => $dsprsig->signature, 'signer' => $dsprsig->signer]);
1966                         }
1967                 }
1968
1969                 if (!empty($diaspora_signed_text)) {
1970                         DBA::insert('diaspora-interaction', ['uri-id' => $item['uri-id'], 'interaction' => $diaspora_signed_text], true);
1971                 }
1972
1973                 if ($item['parent-uri'] === $item['uri']) {
1974                         self::addThread($current_post);
1975                 } else {
1976                         self::updateThread($parent_id);
1977                 }
1978
1979                 if (!empty($item['origin']) || !empty($item['wall']) || !empty($delivery_data['postopts']) || !empty($delivery_data['inform'])) {
1980                         ItemDeliveryData::insert($current_post, $delivery_data);
1981                 }
1982
1983                 DBA::commit();
1984
1985                 /*
1986                  * Due to deadlock issues with the "term" table we are doing these steps after the commit.
1987                  * This is not perfect - but a workable solution until we found the reason for the problem.
1988                  */
1989                 if (!empty($tags)) {
1990                         Term::insertFromTagFieldByItemId($current_post, $tags);
1991                 }
1992
1993                 if (!empty($files)) {
1994                         Term::insertFromFileFieldByItemId($current_post, $files);
1995                 }
1996
1997                 // In that function we check if this is a forum post. Additionally we delete the item under certain circumstances
1998                 if (self::tagDeliver($item['uid'], $current_post)) {
1999                         // Get the user information for the logging
2000                         $user = User::getById($uid);
2001
2002                         Logger::notice('Item had been deleted', ['id' => $current_post, 'user' => $uid, 'account-type' => $user['account-type']]);
2003                         return 0;
2004                 }
2005
2006                 if (!$dontcache) {
2007                         $posted_item = self::selectFirst(self::ITEM_FIELDLIST, ['id' => $current_post]);
2008                         if (DBA::isResult($posted_item)) {
2009                                 if ($notify) {
2010                                         Hook::callAll('post_local_end', $posted_item);
2011                                 } else {
2012                                         Hook::callAll('post_remote_end', $posted_item);
2013                                 }
2014                         } else {
2015                                 Logger::log('new item not found in DB, id ' . $current_post);
2016                         }
2017                 }
2018
2019                 if ($item['parent-uri'] === $item['uri']) {
2020                         self::addShadow($current_post);
2021                 } else {
2022                         self::addShadowPost($current_post);
2023                 }
2024
2025                 self::updateContact($item);
2026
2027                 check_user_notification($current_post);
2028
2029                 if ($notify || ($item['visible'] && ((!empty($parent) && $parent['origin']) || $item['origin']))) {
2030                         Worker::add(['priority' => $priority, 'dont_fork' => true], 'Notifier', $notify_type, $current_post);
2031                 }
2032
2033                 return $current_post;
2034         }
2035
2036         /**
2037          * @brief Insert a new item content entry
2038          *
2039          * @param array $item The item fields that are to be inserted
2040          * @return bool
2041          * @throws \Exception
2042          */
2043         private static function insertActivity(&$item)
2044         {
2045                 $activity_index = self::activityToIndex($item['verb']);
2046
2047                 if ($activity_index < 0) {
2048                         return false;
2049                 }
2050
2051                 $fields = ['activity' => $activity_index, 'uri-hash' => (string)$item['uri-id'], 'uri-id' => $item['uri-id']];
2052
2053                 // We just remove everything that is content
2054                 foreach (array_merge(self::CONTENT_FIELDLIST, self::MIXED_CONTENT_FIELDLIST) as $field) {
2055                         unset($item[$field]);
2056                 }
2057
2058                 // To avoid timing problems, we are using locks.
2059                 $locked = Lock::acquire('item_insert_activity');
2060                 if (!$locked) {
2061                         Logger::log("Couldn't acquire lock for URI " . $item['uri'] . " - proceeding anyway.");
2062                 }
2063
2064                 // Do we already have this content?
2065                 $item_activity = DBA::selectFirst('item-activity', ['id'], ['uri-id' => $item['uri-id']]);
2066                 if (DBA::isResult($item_activity)) {
2067                         $item['iaid'] = $item_activity['id'];
2068                         Logger::log('Fetched activity for URI ' . $item['uri'] . ' (' . $item['iaid'] . ')');
2069                 } elseif (DBA::insert('item-activity', $fields)) {
2070                         $item['iaid'] = DBA::lastInsertId();
2071                         Logger::log('Inserted activity for URI ' . $item['uri'] . ' (' . $item['iaid'] . ')');
2072                 } else {
2073                         // This shouldn't happen.
2074                         Logger::log('Could not insert activity for URI ' . $item['uri'] . ' - should not happen');
2075                         Lock::release('item_insert_activity');
2076                         return false;
2077                 }
2078                 if ($locked) {
2079                         Lock::release('item_insert_activity');
2080                 }
2081                 return true;
2082         }
2083
2084         /**
2085          * @brief Insert a new item content entry
2086          *
2087          * @param array $item The item fields that are to be inserted
2088          * @throws \Exception
2089          */
2090         private static function insertContent(&$item)
2091         {
2092                 $fields = ['uri-plink-hash' => (string)$item['uri-id'], 'uri-id' => $item['uri-id']];
2093
2094                 foreach (array_merge(self::CONTENT_FIELDLIST, self::MIXED_CONTENT_FIELDLIST) as $field) {
2095                         if (isset($item[$field])) {
2096                                 $fields[$field] = $item[$field];
2097                                 unset($item[$field]);
2098                         }
2099                 }
2100
2101                 // To avoid timing problems, we are using locks.
2102                 $locked = Lock::acquire('item_insert_content');
2103                 if (!$locked) {
2104                         Logger::log("Couldn't acquire lock for URI " . $item['uri'] . " - proceeding anyway.");
2105                 }
2106
2107                 // Do we already have this content?
2108                 $item_content = DBA::selectFirst('item-content', ['id'], ['uri-id' => $item['uri-id']]);
2109                 if (DBA::isResult($item_content)) {
2110                         $item['icid'] = $item_content['id'];
2111                         Logger::log('Fetched content for URI ' . $item['uri'] . ' (' . $item['icid'] . ')');
2112                 } elseif (DBA::insert('item-content', $fields)) {
2113                         $item['icid'] = DBA::lastInsertId();
2114                         Logger::log('Inserted content for URI ' . $item['uri'] . ' (' . $item['icid'] . ')');
2115                 } else {
2116                         // This shouldn't happen.
2117                         Logger::log('Could not insert content for URI ' . $item['uri'] . ' - should not happen');
2118                 }
2119                 if ($locked) {
2120                         Lock::release('item_insert_content');
2121                 }
2122         }
2123
2124         /**
2125          * @brief Update existing item content entries
2126          *
2127          * @param array $item      The item fields that are to be changed
2128          * @param array $condition The condition for finding the item content entries
2129          * @return bool
2130          * @throws \Exception
2131          */
2132         private static function updateActivity($item, $condition)
2133         {
2134                 if (empty($item['verb'])) {
2135                         return false;
2136                 }
2137                 $activity_index = self::activityToIndex($item['verb']);
2138
2139                 if ($activity_index < 0) {
2140                         return false;
2141                 }
2142
2143                 $fields = ['activity' => $activity_index];
2144
2145                 Logger::log('Update activity for ' . json_encode($condition));
2146
2147                 DBA::update('item-activity', $fields, $condition, true);
2148
2149                 return true;
2150         }
2151
2152         /**
2153          * @brief Update existing item content entries
2154          *
2155          * @param array $item      The item fields that are to be changed
2156          * @param array $condition The condition for finding the item content entries
2157          * @throws \Exception
2158          */
2159         private static function updateContent($item, $condition)
2160         {
2161                 // We have to select only the fields from the "item-content" table
2162                 $fields = [];
2163                 foreach (array_merge(self::CONTENT_FIELDLIST, self::MIXED_CONTENT_FIELDLIST) as $field) {
2164                         if (isset($item[$field])) {
2165                                 $fields[$field] = $item[$field];
2166                         }
2167                 }
2168
2169                 if (empty($fields)) {
2170                         // when there are no fields at all, just use the condition
2171                         // This is to ensure that we always store content.
2172                         $fields = $condition;
2173                 }
2174
2175                 Logger::log('Update content for ' . json_encode($condition));
2176
2177                 DBA::update('item-content', $fields, $condition, true);
2178         }
2179
2180         /**
2181          * @brief Distributes public items to the receivers
2182          *
2183          * @param integer $itemid      Item ID that should be added
2184          * @param string  $signed_text Original text (for Diaspora signatures), JSON encoded.
2185          * @throws \Exception
2186          */
2187         public static function distribute($itemid, $signed_text = '')
2188         {
2189                 $condition = ["`id` IN (SELECT `parent` FROM `item` WHERE `id` = ?)", $itemid];
2190                 $parent = self::selectFirst(['owner-id'], $condition);
2191                 if (!DBA::isResult($parent)) {
2192                         return;
2193                 }
2194
2195                 // Only distribute public items from native networks
2196                 $condition = ['id' => $itemid, 'uid' => 0,
2197                         'network' => array_merge(Protocol::FEDERATED ,['']),
2198                         'visible' => true, 'deleted' => false, 'moderated' => false, 'private' => false];
2199                 $item = self::selectFirst(self::ITEM_FIELDLIST, $condition);
2200                 if (!DBA::isResult($item)) {
2201                         return;
2202                 }
2203
2204                 $origin = $item['origin'];
2205
2206                 unset($item['id']);
2207                 unset($item['parent']);
2208                 unset($item['mention']);
2209                 unset($item['wall']);
2210                 unset($item['origin']);
2211                 unset($item['starred']);
2212
2213                 $users = [];
2214
2215                 /// @todo add a field "pcid" in the contact table that referrs to the public contact id.
2216                 $owner = DBA::selectFirst('contact', ['url', 'nurl', 'alias'], ['id' => $parent['owner-id']]);
2217                 if (!DBA::isResult($owner)) {
2218                         return;
2219                 }
2220
2221                 $condition = ['nurl' => $owner['nurl'], 'rel' => [Contact::SHARING, Contact::FRIEND]];
2222                 $contacts = DBA::select('contact', ['uid'], $condition);
2223                 while ($contact = DBA::fetch($contacts)) {
2224                         if ($contact['uid'] == 0) {
2225                                 continue;
2226                         }
2227
2228                         $users[$contact['uid']] = $contact['uid'];
2229                 }
2230                 DBA::close($contacts);
2231
2232                 $condition = ['alias' => $owner['url'], 'rel' => [Contact::SHARING, Contact::FRIEND]];
2233                 $contacts = DBA::select('contact', ['uid'], $condition);
2234                 while ($contact = DBA::fetch($contacts)) {
2235                         if ($contact['uid'] == 0) {
2236                                 continue;
2237                         }
2238
2239                         $users[$contact['uid']] = $contact['uid'];
2240                 }
2241                 DBA::close($contacts);
2242
2243                 if (!empty($owner['alias'])) {
2244                         $condition = ['url' => $owner['alias'], 'rel' => [Contact::SHARING, Contact::FRIEND]];
2245                         $contacts = DBA::select('contact', ['uid'], $condition);
2246                         while ($contact = DBA::fetch($contacts)) {
2247                                 if ($contact['uid'] == 0) {
2248                                         continue;
2249                                 }
2250
2251                                 $users[$contact['uid']] = $contact['uid'];
2252                         }
2253                         DBA::close($contacts);
2254                 }
2255
2256                 $origin_uid = 0;
2257
2258                 if ($item['uri'] != $item['parent-uri']) {
2259                         $parents = self::select(['uid', 'origin'], ["`uri` = ? AND `uid` != 0", $item['parent-uri']]);
2260                         while ($parent = self::fetch($parents)) {
2261                                 $users[$parent['uid']] = $parent['uid'];
2262                                 if ($parent['origin'] && !$origin) {
2263                                         $origin_uid = $parent['uid'];
2264                                 }
2265                         }
2266                 }
2267
2268                 foreach ($users as $uid) {
2269                         if ($origin_uid == $uid) {
2270                                 $item['diaspora_signed_text'] = $signed_text;
2271                         }
2272                         self::storeForUser($itemid, $item, $uid);
2273                 }
2274         }
2275
2276         /**
2277          * @brief Store public items for the receivers
2278          *
2279          * @param integer $itemid Item ID that should be added
2280          * @param array   $item   The item entry that will be stored
2281          * @param integer $uid    The user that will receive the item entry
2282          * @throws \Exception
2283          */
2284         private static function storeForUser($itemid, $item, $uid)
2285         {
2286                 $item['uid'] = $uid;
2287                 $item['origin'] = 0;
2288                 $item['wall'] = 0;
2289                 if ($item['uri'] == $item['parent-uri']) {
2290                         $item['contact-id'] = Contact::getIdForURL($item['owner-link'], $uid);
2291                 } else {
2292                         $item['contact-id'] = Contact::getIdForURL($item['author-link'], $uid);
2293                 }
2294
2295                 if (empty($item['contact-id'])) {
2296                         $self = DBA::selectFirst('contact', ['id'], ['self' => true, 'uid' => $uid]);
2297                         if (!DBA::isResult($self)) {
2298                                 return;
2299                         }
2300                         $item['contact-id'] = $self['id'];
2301                 }
2302
2303                 /// @todo Handling of "event-id"
2304
2305                 $notify = false;
2306                 if ($item['uri'] == $item['parent-uri']) {
2307                         $contact = DBA::selectFirst('contact', [], ['id' => $item['contact-id'], 'self' => false]);
2308                         if (DBA::isResult($contact)) {
2309                                 $notify = self::isRemoteSelf($contact, $item);
2310                         }
2311                 }
2312
2313                 $distributed = self::insert($item, false, $notify, true);
2314
2315                 if (!$distributed) {
2316                         Logger::log("Distributed public item " . $itemid . " for user " . $uid . " wasn't stored", Logger::DEBUG);
2317                 } else {
2318                         Logger::log("Distributed public item " . $itemid . " for user " . $uid . " with id " . $distributed, Logger::DEBUG);
2319                 }
2320         }
2321
2322         /**
2323          * @brief Add a shadow entry for a given item id that is a thread starter
2324          *
2325          * We store every public item entry additionally with the user id "0".
2326          * This is used for the community page and for the search.
2327          * It is planned that in the future we will store public item entries only once.
2328          *
2329          * @param integer $itemid Item ID that should be added
2330          * @throws \Exception
2331          */
2332         public static function addShadow($itemid)
2333         {
2334                 $fields = ['uid', 'private', 'moderated', 'visible', 'deleted', 'network', 'uri'];
2335                 $condition = ['id' => $itemid, 'parent' => [0, $itemid]];
2336                 $item = self::selectFirst($fields, $condition);
2337
2338                 if (!DBA::isResult($item)) {
2339                         return;
2340                 }
2341
2342                 // is it already a copy?
2343                 if (($itemid == 0) || ($item['uid'] == 0)) {
2344                         return;
2345                 }
2346
2347                 // Is it a visible public post?
2348                 if (!$item["visible"] || $item["deleted"] || $item["moderated"] || $item["private"]) {
2349                         return;
2350                 }
2351
2352                 // is it an entry from a connector? Only add an entry for natively connected networks
2353                 if (!in_array($item["network"], array_merge(Protocol::FEDERATED ,['']))) {
2354                         return;
2355                 }
2356
2357                 if (self::exists(['uri' => $item['uri'], 'uid' => 0])) {
2358                         return;
2359                 }
2360
2361                 $item = self::selectFirst(self::ITEM_FIELDLIST, ['id' => $itemid]);
2362
2363                 if (DBA::isResult($item)) {
2364                         // Preparing public shadow (removing user specific data)
2365                         $item['uid'] = 0;
2366                         unset($item['id']);
2367                         unset($item['parent']);
2368                         unset($item['wall']);
2369                         unset($item['mention']);
2370                         unset($item['origin']);
2371                         unset($item['starred']);
2372                         unset($item['postopts']);
2373                         unset($item['inform']);
2374                         if ($item['uri'] == $item['parent-uri']) {
2375                                 $item['contact-id'] = $item['owner-id'];
2376                         } else {
2377                                 $item['contact-id'] = $item['author-id'];
2378                         }
2379
2380                         $public_shadow = self::insert($item, false, false, true);
2381
2382                         Logger::log("Stored public shadow for thread ".$itemid." under id ".$public_shadow, Logger::DEBUG);
2383                 }
2384         }
2385
2386         /**
2387          * @brief Add a shadow entry for a given item id that is a comment
2388          *
2389          * This function does the same like the function above - but for comments
2390          *
2391          * @param integer $itemid Item ID that should be added
2392          * @throws \Exception
2393          */
2394         public static function addShadowPost($itemid)
2395         {
2396                 $item = self::selectFirst(self::ITEM_FIELDLIST, ['id' => $itemid]);
2397                 if (!DBA::isResult($item)) {
2398                         return;
2399                 }
2400
2401                 // Is it a toplevel post?
2402                 if ($item['id'] == $item['parent']) {
2403                         self::addShadow($itemid);
2404                         return;
2405                 }
2406
2407                 // Is this a shadow entry?
2408                 if ($item['uid'] == 0) {
2409                         return;
2410                 }
2411
2412                 // Is there a shadow parent?
2413                 if (!self::exists(['uri' => $item['parent-uri'], 'uid' => 0])) {
2414                         return;
2415                 }
2416
2417                 // Is there already a shadow entry?
2418                 if (self::exists(['uri' => $item['uri'], 'uid' => 0])) {
2419                         return;
2420                 }
2421
2422                 // Save "origin" and "parent" state
2423                 $origin = $item['origin'];
2424                 $parent = $item['parent'];
2425
2426                 // Preparing public shadow (removing user specific data)
2427                 $item['uid'] = 0;
2428                 unset($item['id']);
2429                 unset($item['parent']);
2430                 unset($item['wall']);
2431                 unset($item['mention']);
2432                 unset($item['origin']);
2433                 unset($item['starred']);
2434                 unset($item['postopts']);
2435                 unset($item['inform']);
2436                 $item['contact-id'] = Contact::getIdForURL($item['author-link']);
2437
2438                 $public_shadow = self::insert($item, false, false, true);
2439
2440                 Logger::log("Stored public shadow for comment ".$item['uri']." under id ".$public_shadow, Logger::DEBUG);
2441
2442                 // If this was a comment to a Diaspora post we don't get our comment back.
2443                 // This means that we have to distribute the comment by ourselves.
2444                 if ($origin && self::exists(['id' => $parent, 'network' => Protocol::DIASPORA])) {
2445                         self::distribute($public_shadow);
2446                 }
2447         }
2448
2449         /**
2450          * Adds a language specification in a "language" element of given $arr.
2451          * Expects "body" element to exist in $arr.
2452          *
2453          * @param $item
2454          * @throws \Text_LanguageDetect_Exception
2455          */
2456         private static function addLanguageToItemArray(&$item)
2457         {
2458                 $naked_body = BBCode::toPlaintext($item['body'], false);
2459
2460                 $ld = new Text_LanguageDetect();
2461                 $ld->setNameMode(2);
2462                 $languages = $ld->detect($naked_body, 3);
2463
2464                 if (is_array($languages)) {
2465                         $item['language'] = json_encode($languages);
2466                 }
2467         }
2468
2469         /**
2470          * @brief Creates an unique guid out of a given uri
2471          *
2472          * @param string $uri uri of an item entry
2473          * @param string $host hostname for the GUID prefix
2474          * @return string unique guid
2475          */
2476         public static function guidFromUri($uri, $host)
2477         {
2478                 // Our regular guid routine is using this kind of prefix as well
2479                 // We have to avoid that different routines could accidentally create the same value
2480                 $parsed = parse_url($uri);
2481
2482                 // We use a hash of the hostname as prefix for the guid
2483                 $guid_prefix = hash("crc32", $host);
2484
2485                 // Remove the scheme to make sure that "https" and "http" doesn't make a difference
2486                 unset($parsed["scheme"]);
2487
2488                 // Glue it together to be able to make a hash from it
2489                 $host_id = implode("/", $parsed);
2490
2491                 // We could use any hash algorithm since it isn't a security issue
2492                 $host_hash = hash("ripemd128", $host_id);
2493
2494                 return $guid_prefix.$host_hash;
2495         }
2496
2497         /**
2498          * generate an unique URI
2499          *
2500          * @param integer $uid  User id
2501          * @param string  $guid An existing GUID (Otherwise it will be generated)
2502          *
2503          * @return string
2504          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
2505          */
2506         public static function newURI($uid, $guid = "")
2507         {
2508                 if ($guid == "") {
2509                         $guid = System::createUUID();
2510                 }
2511
2512                 return self::getApp()->getBaseURL() . '/objects/' . $guid;
2513         }
2514
2515         /**
2516          * @brief Set "success_update" and "last-item" to the date of the last time we heard from this contact
2517          *
2518          * This can be used to filter for inactive contacts.
2519          * Only do this for public postings to avoid privacy problems, since poco data is public.
2520          * Don't set this value if it isn't from the owner (could be an author that we don't know)
2521          *
2522          * @param array $arr Contains the just posted item record
2523          * @throws \Exception
2524          */
2525         private static function updateContact($arr)
2526         {
2527                 // Unarchive the author
2528                 $contact = DBA::selectFirst('contact', [], ['id' => $arr["author-id"]]);
2529                 if (DBA::isResult($contact)) {
2530                         Contact::unmarkForArchival($contact);
2531                 }
2532
2533                 // Unarchive the contact if it's not our own contact
2534                 $contact = DBA::selectFirst('contact', [], ['id' => $arr["contact-id"], 'self' => false]);
2535                 if (DBA::isResult($contact)) {
2536                         Contact::unmarkForArchival($contact);
2537                 }
2538
2539                 $update = (!$arr['private'] && ((($arr['author-link'] ?? '') === ($arr['owner-link'] ?? '')) || ($arr["parent-uri"] === $arr["uri"])));
2540
2541                 // Is it a forum? Then we don't care about the rules from above
2542                 if (!$update && in_array($arr["network"], [Protocol::ACTIVITYPUB, Protocol::DFRN]) && ($arr["parent-uri"] === $arr["uri"])) {
2543                         if (DBA::exists('contact', ['id' => $arr['contact-id'], 'forum' => true])) {
2544                                 $update = true;
2545                         }
2546                 }
2547
2548                 if ($update) {
2549                         DBA::update('contact', ['success_update' => $arr['received'], 'last-item' => $arr['received']],
2550                                 ['id' => $arr['contact-id']]);
2551                 }
2552                 // Now do the same for the system wide contacts with uid=0
2553                 if (!$arr['private']) {
2554                         DBA::update('contact', ['success_update' => $arr['received'], 'last-item' => $arr['received']],
2555                                 ['id' => $arr['owner-id']]);
2556
2557                         if ($arr['owner-id'] != $arr['author-id']) {
2558                                 DBA::update('contact', ['success_update' => $arr['received'], 'last-item' => $arr['received']],
2559                                         ['id' => $arr['author-id']]);
2560                         }
2561                 }
2562         }
2563
2564         public static function setHashtags(&$item)
2565         {
2566                 $tags = BBCode::getTags($item["body"]);
2567
2568                 // No hashtags?
2569                 if (!count($tags)) {
2570                         return false;
2571                 }
2572
2573                 // What happens in [code], stays in [code]!
2574                 // escape the # and the [
2575                 // hint: we will also get in trouble with #tags, when we want markdown in posts -> ### Headline 3
2576                 $item["body"] = preg_replace_callback("/\[code(.*?)\](.*?)\[\/code\]/ism",
2577                         function ($match) {
2578                                 // we truly ESCape all # and [ to prevent gettin weird tags in [code] blocks
2579                                 $find = ['#', '['];
2580                                 $replace = [chr(27).'sharp', chr(27).'leftsquarebracket'];
2581                                 return ("[code" . $match[1] . "]" . str_replace($find, $replace, $match[2]) . "[/code]");
2582                         }, $item["body"]);
2583
2584                 // This sorting is important when there are hashtags that are part of other hashtags
2585                 // Otherwise there could be problems with hashtags like #test and #test2
2586                 rsort($tags);
2587
2588                 $URLSearchString = "^\[\]";
2589
2590                 // All hashtags should point to the home server if "local_tags" is activated
2591                 if (Config::get('system', 'local_tags')) {
2592                         $item["body"] = preg_replace("/#\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",
2593                                         "#[url=".System::baseUrl()."/search?tag=$2]$2[/url]", $item["body"]);
2594
2595                         $item["tag"] = preg_replace("/#\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",
2596                                         "#[url=".System::baseUrl()."/search?tag=$2]$2[/url]", $item["tag"]);
2597                 }
2598
2599                 // mask hashtags inside of url, bookmarks and attachments to avoid urls in urls
2600                 $item["body"] = preg_replace_callback("/\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",
2601                         function ($match) {
2602                                 return ("[url=" . str_replace("#", "&num;", $match[1]) . "]" . str_replace("#", "&num;", $match[2]) . "[/url]");
2603                         }, $item["body"]);
2604
2605                 $item["body"] = preg_replace_callback("/\[bookmark\=([$URLSearchString]*)\](.*?)\[\/bookmark\]/ism",
2606                         function ($match) {
2607                                 return ("[bookmark=" . str_replace("#", "&num;", $match[1]) . "]" . str_replace("#", "&num;", $match[2]) . "[/bookmark]");
2608                         }, $item["body"]);
2609
2610                 $item["body"] = preg_replace_callback("/\[attachment (.*)\](.*?)\[\/attachment\]/ism",
2611                         function ($match) {
2612                                 return ("[attachment " . str_replace("#", "&num;", $match[1]) . "]" . $match[2] . "[/attachment]");
2613                         }, $item["body"]);
2614
2615                 // Repair recursive urls
2616                 $item["body"] = preg_replace("/&num;\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",
2617                                 "&num;$2", $item["body"]);
2618
2619                 foreach ($tags as $tag) {
2620                         if ((strpos($tag, '#') !== 0) || strpos($tag, '[url=') || $tag[1] == '#') {
2621                                 continue;
2622                         }
2623
2624                         $basetag = str_replace('_',' ',substr($tag,1));
2625                         $newtag = '#[url=' . System::baseUrl() . '/search?tag=' . $basetag . ']' . $basetag . '[/url]';
2626
2627                         $item["body"] = str_replace($tag, $newtag, $item["body"]);
2628
2629                         if (!stristr($item["tag"], "/search?tag=" . $basetag . "]" . $basetag . "[/url]")) {
2630                                 if (strlen($item["tag"])) {
2631                                         $item["tag"] = ',' . $item["tag"];
2632                                 }
2633                                 $item["tag"] = $newtag . $item["tag"];
2634                         }
2635                 }
2636
2637                 // Convert back the masked hashtags
2638                 $item["body"] = str_replace("&num;", "#", $item["body"]);
2639
2640                 // Remember! What happens in [code], stays in [code]
2641                 // roleback the # and [
2642                 $item["body"] = preg_replace_callback("/\[code(.*?)\](.*?)\[\/code\]/ism",
2643                         function ($match) {
2644                                 // we truly unESCape all sharp and leftsquarebracket
2645                                 $find = [chr(27).'sharp', chr(27).'leftsquarebracket'];
2646                                 $replace = ['#', '['];
2647                                 return ("[code" . $match[1] . "]" . str_replace($find, $replace, $match[2]) . "[/code]");
2648                         }, $item["body"]);
2649         }
2650
2651         /**
2652          * look for mention tags and setup a second delivery chain for forum/community posts if appropriate
2653          *
2654          * @param int $uid
2655          * @param int $item_id
2656          * @return boolean true if item was deleted, else false
2657          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
2658          * @throws \ImagickException
2659          */
2660         private static function tagDeliver($uid, $item_id)
2661         {
2662                 $mention = false;
2663
2664                 $user = DBA::selectFirst('user', [], ['uid' => $uid]);
2665                 if (!DBA::isResult($user)) {
2666                         return false;
2667                 }
2668
2669                 $community_page = (($user['page-flags'] == User::PAGE_FLAGS_COMMUNITY) ? true : false);
2670                 $prvgroup = (($user['page-flags'] == User::PAGE_FLAGS_PRVGROUP) ? true : false);
2671
2672                 $item = self::selectFirst(self::ITEM_FIELDLIST, ['id' => $item_id]);
2673                 if (!DBA::isResult($item)) {
2674                         return false;
2675                 }
2676
2677                 $link = Strings::normaliseLink(System::baseUrl() . '/profile/' . $user['nickname']);
2678
2679                 /*
2680                  * Diaspora uses their own hardwired link URL in @-tags
2681                  * instead of the one we supply with webfinger
2682                  */
2683                 $dlink = Strings::normaliseLink(System::baseUrl() . '/u/' . $user['nickname']);
2684
2685                 $cnt = preg_match_all('/[\@\!]\[url\=(.*?)\](.*?)\[\/url\]/ism', $item['body'], $matches, PREG_SET_ORDER);
2686                 if ($cnt) {
2687                         foreach ($matches as $mtch) {
2688                                 if (Strings::compareLink($link, $mtch[1]) || Strings::compareLink($dlink, $mtch[1])) {
2689                                         $mention = true;
2690                                         Logger::log('mention found: ' . $mtch[2]);
2691                                 }
2692                         }
2693                 }
2694
2695                 if (!$mention) {
2696                         if (($community_page || $prvgroup) &&
2697                                   !$item['wall'] && !$item['origin'] && ($item['id'] == $item['parent'])) {
2698                                 // mmh.. no mention.. community page or private group... no wall.. no origin.. top-post (not a comment)
2699                                 // delete it!
2700                                 Logger::log("no-mention top-level post to community or private group. delete.");
2701                                 DBA::delete('item', ['id' => $item_id]);
2702                                 return true;
2703                         }
2704                         return false;
2705                 }
2706
2707                 $arr = ['item' => $item, 'user' => $user];
2708
2709                 Hook::callAll('tagged', $arr);
2710
2711                 if (!$community_page && !$prvgroup) {
2712                         return false;
2713                 }
2714
2715                 /*
2716                  * tgroup delivery - setup a second delivery chain
2717                  * prevent delivery looping - only proceed
2718                  * if the message originated elsewhere and is a top-level post
2719                  */
2720                 if ($item['wall'] || $item['origin'] || ($item['id'] != $item['parent'])) {
2721                         return false;
2722                 }
2723
2724                 // now change this copy of the post to a forum head message and deliver to all the tgroup members
2725                 $self = DBA::selectFirst('contact', ['id', 'name', 'url', 'thumb'], ['uid' => $uid, 'self' => true]);
2726                 if (!DBA::isResult($self)) {
2727                         return false;
2728                 }
2729
2730                 $owner_id = Contact::getIdForURL($self['url']);
2731
2732                 // also reset all the privacy bits to the forum default permissions
2733
2734                 $private = ($user['allow_cid'] || $user['allow_gid'] || $user['deny_cid'] || $user['deny_gid']) ? 1 : 0;
2735
2736                 $psid = PermissionSet::fetchIDForPost($user);
2737
2738                 $forum_mode = ($prvgroup ? 2 : 1);
2739
2740                 $fields = ['wall' => true, 'origin' => true, 'forum_mode' => $forum_mode, 'contact-id' => $self['id'],
2741                         'owner-id' => $owner_id, 'private' => $private, 'psid' => $psid];
2742                 self::update($fields, ['id' => $item_id]);
2743
2744                 self::updateThread($item_id);
2745
2746                 Worker::add(['priority' => PRIORITY_HIGH, 'dont_fork' => true], 'Notifier', Delivery::POST, $item_id);
2747
2748                 return false;
2749         }
2750
2751         public static function isRemoteSelf($contact, &$datarray)
2752         {
2753                 $a = \get_app();
2754
2755                 if (!$contact['remote_self']) {
2756                         return false;
2757                 }
2758
2759                 // Prevent the forwarding of posts that are forwarded
2760                 if (!empty($datarray["extid"]) && ($datarray["extid"] == Protocol::DFRN)) {
2761                         Logger::log('Already forwarded', Logger::DEBUG);
2762                         return false;
2763                 }
2764
2765                 // Prevent to forward already forwarded posts
2766                 if ($datarray["app"] == $a->getHostName()) {
2767                         Logger::log('Already forwarded (second test)', Logger::DEBUG);
2768                         return false;
2769                 }
2770
2771                 // Only forward posts
2772                 if ($datarray["verb"] != Activity::POST) {
2773                         Logger::log('No post', Logger::DEBUG);
2774                         return false;
2775                 }
2776
2777                 if (($contact['network'] != Protocol::FEED) && $datarray['private']) {
2778                         Logger::log('Not public', Logger::DEBUG);
2779                         return false;
2780                 }
2781
2782                 $datarray2 = $datarray;
2783                 Logger::log('remote-self start - Contact '.$contact['url'].' - '.$contact['remote_self'].' Item '.print_r($datarray, true), Logger::DEBUG);
2784                 if ($contact['remote_self'] == 2) {
2785                         $self = DBA::selectFirst('contact', ['id', 'name', 'url', 'thumb'],
2786                                         ['uid' => $contact['uid'], 'self' => true]);
2787                         if (DBA::isResult($self)) {
2788                                 $datarray['contact-id'] = $self["id"];
2789
2790                                 $datarray['owner-name'] = $self["name"];
2791                                 $datarray['owner-link'] = $self["url"];
2792                                 $datarray['owner-avatar'] = $self["thumb"];
2793
2794                                 $datarray['author-name']   = $datarray['owner-name'];
2795                                 $datarray['author-link']   = $datarray['owner-link'];
2796                                 $datarray['author-avatar'] = $datarray['owner-avatar'];
2797
2798                                 unset($datarray['edited']);
2799
2800                                 unset($datarray['network']);
2801                                 unset($datarray['owner-id']);
2802                                 unset($datarray['author-id']);
2803                         }
2804
2805                         if ($contact['network'] != Protocol::FEED) {
2806                                 $datarray["guid"] = System::createUUID();
2807                                 unset($datarray["plink"]);
2808                                 $datarray["uri"] = self::newURI($contact['uid'], $datarray["guid"]);
2809                                 $datarray["parent-uri"] = $datarray["uri"];
2810                                 $datarray["thr-parent"] = $datarray["uri"];
2811                                 $datarray["extid"] = Protocol::DFRN;
2812                                 $urlpart = parse_url($datarray2['author-link']);
2813                                 $datarray["app"] = $urlpart["host"];
2814                         } else {
2815                                 $datarray['private'] = 0;
2816                         }
2817                 }
2818
2819                 if ($contact['network'] != Protocol::FEED) {
2820                         // Store the original post
2821                         $result = self::insert($datarray2, false, false);
2822                         Logger::log('remote-self post original item - Contact '.$contact['url'].' return '.$result.' Item '.print_r($datarray2, true), Logger::DEBUG);
2823                 } else {
2824                         $datarray["app"] = "Feed";
2825                         $result = true;
2826                 }
2827
2828                 // Trigger automatic reactions for addons
2829                 $datarray['api_source'] = true;
2830
2831                 // We have to tell the hooks who we are - this really should be improved
2832                 $_SESSION["authenticated"] = true;
2833                 $_SESSION["uid"] = $contact['uid'];
2834
2835                 return $result;
2836         }
2837
2838         /**
2839          *
2840          * @param string $s
2841          * @param int    $uid
2842          * @param array  $item
2843          * @param int    $cid
2844          * @return string
2845          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
2846          * @throws \ImagickException
2847          */
2848         public static function fixPrivatePhotos($s, $uid, $item = null, $cid = 0)
2849         {
2850                 if (Config::get('system', 'disable_embedded')) {
2851                         return $s;
2852                 }
2853
2854                 Logger::log('check for photos', Logger::DEBUG);
2855                 $site = substr(System::baseUrl(), strpos(System::baseUrl(), '://'));
2856
2857                 $orig_body = $s;
2858                 $new_body = '';
2859
2860                 $img_start = strpos($orig_body, '[img');
2861                 $img_st_close = ($img_start !== false ? strpos(substr($orig_body, $img_start), ']') : false);
2862                 $img_len = ($img_start !== false ? strpos(substr($orig_body, $img_start + $img_st_close + 1), '[/img]') : false);
2863
2864                 while (($img_st_close !== false) && ($img_len !== false)) {
2865                         $img_st_close++; // make it point to AFTER the closing bracket
2866                         $image = substr($orig_body, $img_start + $img_st_close, $img_len);
2867
2868                         Logger::log('found photo ' . $image, Logger::DEBUG);
2869
2870                         if (stristr($image, $site . '/photo/')) {
2871                                 // Only embed locally hosted photos
2872                                 $replace = false;
2873                                 $i = basename($image);
2874                                 $i = str_replace(['.jpg', '.png', '.gif'], ['', '', ''], $i);
2875                                 $x = strpos($i, '-');
2876
2877                                 if ($x) {
2878                                         $res = substr($i, $x + 1);
2879                                         $i = substr($i, 0, $x);
2880                                         $photo = Photo::getPhotoForUser($uid, $i, $res);
2881                                         if (DBA::isResult($photo)) {
2882                                                 /*
2883                                                  * Check to see if we should replace this photo link with an embedded image
2884                                                  * 1. No need to do so if the photo is public
2885                                                  * 2. If there's a contact-id provided, see if they're in the access list
2886                                                  *    for the photo. If so, embed it.
2887                                                  * 3. Otherwise, if we have an item, see if the item permissions match the photo
2888                                                  *    permissions, regardless of order but first check to see if they're an exact
2889                                                  *    match to save some processing overhead.
2890                                                  */
2891                                                 if (self::hasPermissions($photo)) {
2892                                                         if ($cid) {
2893                                                                 $recips = self::enumeratePermissions($photo);
2894                                                                 if (in_array($cid, $recips)) {
2895                                                                         $replace = true;
2896                                                                 }
2897                                                         } elseif ($item) {
2898                                                                 if (self::samePermissions($uid, $item, $photo)) {
2899                                                                         $replace = true;
2900                                                                 }
2901                                                         }
2902                                                 }
2903                                                 if ($replace) {
2904                                                         $photo_img = Photo::getImageForPhoto($photo);
2905                                                         // If a custom width and height were specified, apply before embedding
2906                                                         if (preg_match("/\[img\=([0-9]*)x([0-9]*)\]/is", substr($orig_body, $img_start, $img_st_close), $match)) {
2907                                                                 Logger::log('scaling photo', Logger::DEBUG);
2908
2909                                                                 $width = intval($match[1]);
2910                                                                 $height = intval($match[2]);
2911
2912                                                                 $photo_img->scaleDown(max($width, $height));
2913                                                         }
2914
2915                                                         $data = $photo_img->asString();
2916                                                         $type = $photo_img->getType();
2917
2918                                                         Logger::log('replacing photo', Logger::DEBUG);
2919                                                         $image = 'data:' . $type . ';base64,' . base64_encode($data);
2920                                                         Logger::log('replaced: ' . $image, Logger::DATA);
2921                                                 }
2922                                         }
2923                                 }
2924                         }
2925
2926                         $new_body = $new_body . substr($orig_body, 0, $img_start + $img_st_close) . $image . '[/img]';
2927                         $orig_body = substr($orig_body, $img_start + $img_st_close + $img_len + strlen('[/img]'));
2928                         if ($orig_body === false) {
2929                                 $orig_body = '';
2930                         }
2931
2932                         $img_start = strpos($orig_body, '[img');
2933                         $img_st_close = ($img_start !== false ? strpos(substr($orig_body, $img_start), ']') : false);
2934                         $img_len = ($img_start !== false ? strpos(substr($orig_body, $img_start + $img_st_close + 1), '[/img]') : false);
2935                 }
2936
2937                 $new_body = $new_body . $orig_body;
2938
2939                 return $new_body;
2940         }
2941
2942         private static function hasPermissions($obj)
2943         {
2944                 return !empty($obj['allow_cid']) || !empty($obj['allow_gid']) ||
2945                         !empty($obj['deny_cid']) || !empty($obj['deny_gid']);
2946         }
2947
2948         private static function samePermissions($uid, $obj1, $obj2)
2949         {
2950                 // first part is easy. Check that these are exactly the same.
2951                 if (($obj1['allow_cid'] == $obj2['allow_cid'])
2952                         && ($obj1['allow_gid'] == $obj2['allow_gid'])
2953                         && ($obj1['deny_cid'] == $obj2['deny_cid'])
2954                         && ($obj1['deny_gid'] == $obj2['deny_gid'])) {
2955                         return true;
2956                 }
2957
2958                 // This is harder. Parse all the permissions and compare the resulting set.
2959                 $recipients1 = self::enumeratePermissions($obj1);
2960                 $recipients2 = self::enumeratePermissions($obj2);
2961                 sort($recipients1);
2962                 sort($recipients2);
2963
2964                 /// @TODO Comparison of arrays, maybe use array_diff_assoc() here?
2965                 return ($recipients1 == $recipients2);
2966         }
2967
2968         /**
2969          * Returns an array of contact-ids that are allowed to see this object
2970          *
2971          * @param array $obj        Item array with at least uid, allow_cid, allow_gid, deny_cid and deny_gid
2972          * @param bool  $check_dead Prunes unavailable contacts from the result
2973          * @return array
2974          * @throws \Exception
2975          */
2976         public static function enumeratePermissions(array $obj, bool $check_dead = false)
2977         {
2978                 /** @var ACLFormatter $aclFormater */
2979                 $aclFormater = self::getClass(ACLFormatter::class);
2980
2981                 $allow_people = $aclFormater->expand($obj['allow_cid']);
2982                 $allow_groups = Group::expand($obj['uid'], $aclFormater->expand($obj['allow_gid']), $check_dead);
2983                 $deny_people  = $aclFormater->expand($obj['deny_cid']);
2984                 $deny_groups  = Group::expand($obj['uid'], $aclFormater->expand($obj['deny_gid']), $check_dead);
2985                 $recipients   = array_unique(array_merge($allow_people, $allow_groups));
2986                 $deny         = array_unique(array_merge($deny_people, $deny_groups));
2987                 $recipients   = array_diff($recipients, $deny);
2988                 return $recipients;
2989         }
2990
2991         public static function getFeedTags($item)
2992         {
2993                 $ret = [];
2994                 $matches = false;
2995                 $cnt = preg_match_all('|\#\[url\=(.*?)\](.*?)\[\/url\]|', $item['tag'], $matches);
2996                 if ($cnt) {
2997                         for ($x = 0; $x < $cnt; $x ++) {
2998                                 if ($matches[1][$x]) {
2999                                         $ret[$matches[2][$x]] = ['#', $matches[1][$x], $matches[2][$x]];
3000                                 }
3001                         }
3002                 }
3003                 $matches = false;
3004                 $cnt = preg_match_all('|\@\[url\=(.*?)\](.*?)\[\/url\]|', $item['tag'], $matches);
3005                 if ($cnt) {
3006                         for ($x = 0; $x < $cnt; $x ++) {
3007                                 if ($matches[1][$x]) {
3008                                         $ret[] = ['@', $matches[1][$x], $matches[2][$x]];
3009                                 }
3010                         }
3011                 }
3012                 return $ret;
3013         }
3014
3015         public static function expire($uid, $days, $network = "", $force = false)
3016         {
3017                 if (!$uid || ($days < 1)) {
3018                         return;
3019                 }
3020
3021                 $condition = ["`uid` = ? AND NOT `deleted` AND `id` = `parent` AND `gravity` = ?",
3022                         $uid, GRAVITY_PARENT];
3023
3024                 /*
3025                  * $expire_network_only = save your own wall posts
3026                  * and just expire conversations started by others
3027                  */
3028                 $expire_network_only = PConfig::get($uid, 'expire', 'network_only', false);
3029
3030                 if ($expire_network_only) {
3031                         $condition[0] .= " AND NOT `wall`";
3032                 }
3033
3034                 if ($network != "") {
3035                         $condition[0] .= " AND `network` = ?";
3036                         $condition[] = $network;
3037                 }
3038
3039                 $condition[0] .= " AND `received` < UTC_TIMESTAMP() - INTERVAL ? DAY";
3040                 $condition[] = $days;
3041
3042                 $items = self::select(['file', 'resource-id', 'starred', 'type', 'id', 'post-type'], $condition);
3043
3044                 if (!DBA::isResult($items)) {
3045                         return;
3046                 }
3047
3048                 $expire_items = PConfig::get($uid, 'expire', 'items', true);
3049
3050                 // Forcing expiring of items - but not notes and marked items
3051                 if ($force) {
3052                         $expire_items = true;
3053                 }
3054
3055                 $expire_notes = PConfig::get($uid, 'expire', 'notes', true);
3056                 $expire_starred = PConfig::get($uid, 'expire', 'starred', true);
3057                 $expire_photos = PConfig::get($uid, 'expire', 'photos', false);
3058
3059                 $expired = 0;
3060
3061                 while ($item = Item::fetch($items)) {
3062                         // don't expire filed items
3063
3064                         if (strpos($item['file'], '[') !== false) {
3065                                 continue;
3066                         }
3067
3068                         // Only expire posts, not photos and photo comments
3069
3070                         if (!$expire_photos && strlen($item['resource-id'])) {
3071                                 continue;
3072                         } elseif (!$expire_starred && intval($item['starred'])) {
3073                                 continue;
3074                         } elseif (!$expire_notes && (($item['type'] == 'note') || ($item['post-type'] == Item::PT_PERSONAL_NOTE))) {
3075                                 continue;
3076                         } elseif (!$expire_items && ($item['type'] != 'note') && ($item['post-type'] != Item::PT_PERSONAL_NOTE)) {
3077                                 continue;
3078                         }
3079
3080                         self::deleteById($item['id'], PRIORITY_LOW);
3081
3082                         ++$expired;
3083                 }
3084                 DBA::close($items);
3085                 Logger::log('User ' . $uid . ": expired $expired items; expire items: $expire_items, expire notes: $expire_notes, expire starred: $expire_starred, expire photos: $expire_photos");
3086         }
3087
3088         public static function firstPostDate($uid, $wall = false)
3089         {
3090                 $condition = ['uid' => $uid, 'wall' => $wall, 'deleted' => false, 'visible' => true, 'moderated' => false];
3091                 $params = ['order' => ['received' => false]];
3092                 $thread = DBA::selectFirst('thread', ['received'], $condition, $params);
3093                 if (DBA::isResult($thread)) {
3094                         return substr(DateTimeFormat::local($thread['received']), 0, 10);
3095                 }
3096                 return false;
3097         }
3098
3099         /**
3100          * @brief add/remove activity to an item
3101          *
3102          * Toggle activities as like,dislike,attend of an item
3103          *
3104          * @param string $item_id
3105          * @param string $verb
3106          *            Activity verb. One of
3107          *            like, unlike, dislike, undislike, attendyes, unattendyes,
3108          *            attendno, unattendno, attendmaybe, unattendmaybe
3109          * @return bool
3110          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
3111          * @throws \ImagickException
3112          * @hook  'post_local_end'
3113          *            array $arr
3114          *            'post_id' => ID of posted item
3115          */
3116         public static function performLike($item_id, $verb)
3117         {
3118                 if (!Session::isAuthenticated()) {
3119                         return false;
3120                 }
3121
3122                 switch ($verb) {
3123                         case 'like':
3124                         case 'unlike':
3125                                 $activity = Activity::LIKE;
3126                                 break;
3127                         case 'dislike':
3128                         case 'undislike':
3129                                 $activity = Activity::DISLIKE;
3130                                 break;
3131                         case 'attendyes':
3132                         case 'unattendyes':
3133                                 $activity = Activity::ATTEND;
3134                                 break;
3135                         case 'attendno':
3136                         case 'unattendno':
3137                                 $activity = Activity::ATTENDNO;
3138                                 break;
3139                         case 'attendmaybe':
3140                         case 'unattendmaybe':
3141                                 $activity = Activity::ATTENDMAYBE;
3142                                 break;
3143                         default:
3144                                 Logger::log('like: unknown verb ' . $verb . ' for item ' . $item_id);
3145                                 return false;
3146                 }
3147
3148                 // Enable activity toggling instead of on/off
3149                 $event_verb_flag = $activity === Activity::ATTEND || $activity === Activity::ATTENDNO || $activity === Activity::ATTENDMAYBE;
3150
3151                 Logger::log('like: verb ' . $verb . ' item ' . $item_id);
3152
3153                 $item = self::selectFirst(self::ITEM_FIELDLIST, ['`id` = ? OR `uri` = ?', $item_id, $item_id]);
3154                 if (!DBA::isResult($item)) {
3155                         Logger::log('like: unknown item ' . $item_id);
3156                         return false;
3157                 }
3158
3159                 $item_uri = $item['uri'];
3160
3161                 $uid = $item['uid'];
3162                 if (($uid == 0) && local_user()) {
3163                         $uid = local_user();
3164                 }
3165
3166                 if (!Security::canWriteToUserWall($uid)) {
3167                         Logger::log('like: unable to write on wall ' . $uid);
3168                         return false;
3169                 }
3170
3171                 // Retrieves the local post owner
3172                 $owner_self_contact = DBA::selectFirst('contact', [], ['uid' => $uid, 'self' => true]);
3173                 if (!DBA::isResult($owner_self_contact)) {
3174                         Logger::log('like: unknown owner ' . $uid);
3175                         return false;
3176                 }
3177
3178                 // Retrieve the current logged in user's public contact
3179                 $author_id = public_contact();
3180
3181                 $author_contact = DBA::selectFirst('contact', ['url'], ['id' => $author_id]);
3182                 if (!DBA::isResult($author_contact)) {
3183                         Logger::log('like: unknown author ' . $author_id);
3184                         return false;
3185                 }
3186
3187                 // Contact-id is the uid-dependant author contact
3188                 if (local_user() == $uid) {
3189                         $item_contact_id = $owner_self_contact['id'];
3190                 } else {
3191                         $item_contact_id = Contact::getIdForURL($author_contact['url'], $uid, true);
3192                         $item_contact = DBA::selectFirst('contact', [], ['id' => $item_contact_id]);
3193                         if (!DBA::isResult($item_contact)) {
3194                                 Logger::log('like: unknown item contact ' . $item_contact_id);
3195                                 return false;
3196                         }
3197                 }
3198
3199                 // Look for an existing verb row
3200                 // event participation are essentially radio toggles. If you make a subsequent choice,
3201                 // we need to eradicate your first choice.
3202                 if ($event_verb_flag) {
3203                         $verbs = [Activity::ATTEND, Activity::ATTENDNO, Activity::ATTENDMAYBE];
3204
3205                         // Translate to the index based activity index
3206                         $activities = [];
3207                         foreach ($verbs as $verb) {
3208                                 $activities[] = self::activityToIndex($verb);
3209                         }
3210                 } else {
3211                         $activities = self::activityToIndex($activity);
3212                 }
3213
3214                 $condition = ['activity' => $activities, 'deleted' => false, 'gravity' => GRAVITY_ACTIVITY,
3215                         'author-id' => $author_id, 'uid' => $item['uid'], 'thr-parent' => $item_uri];
3216
3217                 $like_item = self::selectFirst(['id', 'guid', 'verb'], $condition);
3218
3219                 // If it exists, mark it as deleted
3220                 if (DBA::isResult($like_item)) {
3221                         self::deleteById($like_item['id']);
3222
3223                         if (!$event_verb_flag || $like_item['verb'] == $activity) {
3224                                 return true;
3225                         }
3226                 }
3227
3228                 // Verb is "un-something", just trying to delete existing entries
3229                 if (strpos($verb, 'un') === 0) {
3230                         return true;
3231                 }
3232
3233                 $objtype = $item['resource-id'] ? Activity\ObjectType::IMAGE : Activity\ObjectType::NOTE;
3234
3235                 $new_item = [
3236                         'guid'          => System::createUUID(),
3237                         'uri'           => self::newURI($item['uid']),
3238                         'uid'           => $item['uid'],
3239                         'contact-id'    => $item_contact_id,
3240                         'wall'          => $item['wall'],
3241                         'origin'        => 1,
3242                         'network'       => Protocol::DFRN,
3243                         'gravity'       => GRAVITY_ACTIVITY,
3244                         'parent'        => $item['id'],
3245                         'parent-uri'    => $item['uri'],
3246                         'thr-parent'    => $item['uri'],
3247                         'owner-id'      => $author_id,
3248                         'author-id'     => $author_id,
3249                         'body'          => $activity,
3250                         'verb'          => $activity,
3251                         'object-type'   => $objtype,
3252                         'allow_cid'     => $item['allow_cid'],
3253                         'allow_gid'     => $item['allow_gid'],
3254                         'deny_cid'      => $item['deny_cid'],
3255                         'deny_gid'      => $item['deny_gid'],
3256                         'visible'       => 1,
3257                         'unseen'        => 1,
3258                 ];
3259
3260                 $signed = Diaspora::createLikeSignature($uid, $new_item);
3261                 if (!empty($signed)) {
3262                         $new_item['diaspora_signed_text'] = json_encode($signed);
3263                 }
3264
3265                 $new_item_id = self::insert($new_item);
3266
3267                 // If the parent item isn't visible then set it to visible
3268                 if (!$item['visible']) {
3269                         self::update(['visible' => true], ['id' => $item['id']]);
3270                 }
3271
3272                 $new_item['id'] = $new_item_id;
3273
3274                 Hook::callAll('post_local_end', $new_item);
3275
3276                 return true;
3277         }
3278
3279         private static function addThread($itemid, $onlyshadow = false)
3280         {
3281                 $fields = ['uid', 'created', 'edited', 'commented', 'received', 'changed', 'wall', 'private', 'pubmail',
3282                         'moderated', 'visible', 'starred', 'contact-id', 'post-type',
3283                         'deleted', 'origin', 'forum_mode', 'mention', 'network', 'author-id', 'owner-id'];
3284                 $condition = ["`id` = ? AND (`parent` = ? OR `parent` = 0)", $itemid, $itemid];
3285                 $item = self::selectFirst($fields, $condition);
3286
3287                 if (!DBA::isResult($item)) {
3288                         return;
3289                 }
3290
3291                 $item['iid'] = $itemid;
3292
3293                 if (!$onlyshadow) {
3294                         $result = DBA::insert('thread', $item);
3295
3296                         Logger::log("Add thread for item ".$itemid." - ".print_r($result, true), Logger::DEBUG);
3297                 }
3298         }
3299
3300         private static function updateThread($itemid, $setmention = false)
3301         {
3302                 $fields = ['uid', 'guid', 'created', 'edited', 'commented', 'received', 'changed', 'post-type',
3303                         'wall', 'private', 'pubmail', 'moderated', 'visible', 'starred', 'contact-id',
3304                         'deleted', 'origin', 'forum_mode', 'network', 'author-id', 'owner-id'];
3305                 $condition = ["`id` = ? AND (`parent` = ? OR `parent` = 0)", $itemid, $itemid];
3306
3307                 $item = self::selectFirst($fields, $condition);
3308                 if (!DBA::isResult($item)) {
3309                         return;
3310                 }
3311
3312                 if ($setmention) {
3313                         $item["mention"] = 1;
3314                 }
3315
3316                 $fields = [];
3317
3318                 foreach ($item as $field => $data) {
3319                         if (!in_array($field, ["guid"])) {
3320                                 $fields[$field] = $data;
3321                         }
3322                 }
3323
3324                 $result = DBA::update('thread', $fields, ['iid' => $itemid]);
3325
3326                 Logger::log("Update thread for item ".$itemid." - guid ".$item["guid"]." - ".(int)$result, Logger::DEBUG);
3327         }
3328
3329         private static function deleteThread($itemid, $itemuri = "")
3330         {
3331                 $item = DBA::selectFirst('thread', ['uid'], ['iid' => $itemid]);
3332                 if (!DBA::isResult($item)) {
3333                         Logger::log('No thread found for id '.$itemid, Logger::DEBUG);
3334                         return;
3335                 }
3336
3337                 $result = DBA::delete('thread', ['iid' => $itemid], ['cascade' => false]);
3338
3339                 Logger::log("deleteThread: Deleted thread for item ".$itemid." - ".print_r($result, true), Logger::DEBUG);
3340
3341                 if ($itemuri != "") {
3342                         $condition = ["`uri` = ? AND NOT `deleted` AND NOT (`uid` IN (?, 0))", $itemuri, $item["uid"]];
3343                         if (!self::exists($condition)) {
3344                                 DBA::delete('item', ['uri' => $itemuri, 'uid' => 0]);
3345                                 Logger::log("deleteThread: Deleted shadow for item ".$itemuri, Logger::DEBUG);
3346                         }
3347                 }
3348         }
3349
3350         public static function getPermissionsSQLByUserId($owner_id)
3351         {
3352                 $local_user = local_user();
3353                 $remote_user = Session::getRemoteContactID($owner_id);
3354
3355                 /*
3356                  * Construct permissions
3357                  *
3358                  * default permissions - anonymous user
3359                  */
3360                 $sql = " AND NOT `item`.`private`";
3361
3362                 // Profile owner - everything is visible
3363                 if ($local_user && ($local_user == $owner_id)) {
3364                         $sql = '';
3365                 } elseif ($remote_user) {
3366                         /*
3367                          * Authenticated visitor. Unless pre-verified,
3368                          * check that the contact belongs to this $owner_id
3369                          * and load the groups the visitor belongs to.
3370                          * If pre-verified, the caller is expected to have already
3371                          * done this and passed the groups into this function.
3372                          */
3373                         $set = PermissionSet::get($owner_id, $remote_user);
3374
3375                         if (!empty($set)) {
3376                                 $sql_set = " OR (`item`.`private` IN (1,2) AND `item`.`wall` AND `item`.`psid` IN (" . implode(',', $set) . "))";
3377                         } else {
3378                                 $sql_set = '';
3379                         }
3380
3381                         $sql = " AND (NOT `item`.`private`" . $sql_set . ")";
3382                 }
3383
3384                 return $sql;
3385         }
3386
3387         /**
3388          * get translated item type
3389          *
3390          * @param $item
3391          * @return string
3392          */
3393         public static function postType($item)
3394         {
3395                 if (!empty($item['event-id'])) {
3396                         return L10n::t('event');
3397                 } elseif (!empty($item['resource-id'])) {
3398                         return L10n::t('photo');
3399                 } elseif (!empty($item['verb']) && $item['verb'] !== Activity::POST) {
3400                         return L10n::t('activity');
3401                 } elseif ($item['id'] != $item['parent']) {
3402                         return L10n::t('comment');
3403                 }
3404
3405                 return L10n::t('post');
3406         }
3407
3408         /**
3409          * Sets the "rendered-html" field of the provided item
3410          *
3411          * Body is preserved to avoid side-effects as we modify it just-in-time for spoilers and private image links
3412          *
3413          * @param array $item
3414          * @param bool  $update
3415          *
3416          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
3417          * @todo Remove reference, simply return "rendered-html" and "rendered-hash"
3418          */
3419         public static function putInCache(&$item, $update = false)
3420         {
3421                 $body = $item["body"];
3422
3423                 $rendered_hash = $item['rendered-hash'] ?? '';
3424                 $rendered_html = $item['rendered-html'] ?? '';
3425
3426                 if ($rendered_hash == ''
3427                         || $rendered_html == ""
3428                         || $rendered_hash != hash("md5", $item["body"])
3429                         || Config::get("system", "ignore_cache")
3430                 ) {
3431                         self::addRedirToImageTags($item);
3432
3433                         $item["rendered-html"] = BBCode::convert($item["body"]);
3434                         $item["rendered-hash"] = hash("md5", $item["body"]);
3435
3436                         $hook_data = ['item' => $item, 'rendered-html' => $item['rendered-html'], 'rendered-hash' => $item['rendered-hash']];
3437                         Hook::callAll('put_item_in_cache', $hook_data);
3438                         $item['rendered-html'] = $hook_data['rendered-html'];
3439                         $item['rendered-hash'] = $hook_data['rendered-hash'];
3440                         unset($hook_data);
3441
3442                         // Force an update if the generated values differ from the existing ones
3443                         if ($rendered_hash != $item["rendered-hash"]) {
3444                                 $update = true;
3445                         }
3446
3447                         // Only compare the HTML when we forcefully ignore the cache
3448                         if (Config::get("system", "ignore_cache") && ($rendered_html != $item["rendered-html"])) {
3449                                 $update = true;
3450                         }
3451
3452                         if ($update && !empty($item["id"])) {
3453                                 self::update(
3454                                         [
3455                                                 'rendered-html' => $item["rendered-html"],
3456                                                 'rendered-hash' => $item["rendered-hash"]
3457                                         ],
3458                                         ['id' => $item["id"]]
3459                                 );
3460                         }
3461                 }
3462
3463                 $item["body"] = $body;
3464         }
3465
3466         /**
3467          * @brief Find any non-embedded images in private items and add redir links to them
3468          *
3469          * @param array &$item The field array of an item row
3470          */
3471         private static function addRedirToImageTags(array &$item)
3472         {
3473                 $app = self::getApp();
3474
3475                 $matches = [];
3476                 $cnt = preg_match_all('|\[img\](http[^\[]*?/photo/[a-fA-F0-9]+?(-[0-9]\.[\w]+?)?)\[\/img\]|', $item['body'], $matches, PREG_SET_ORDER);
3477                 if ($cnt) {
3478                         foreach ($matches as $mtch) {
3479                                 if (strpos($mtch[1], '/redir') !== false) {
3480                                         continue;
3481                                 }
3482
3483                                 if ((local_user() == $item['uid']) && ($item['private'] == 1) && ($item['contact-id'] != $app->contact['id']) && ($item['network'] == Protocol::DFRN)) {
3484                                         $img_url = 'redir/' . $item['contact-id'] . '?url=' . urlencode($mtch[1]);
3485                                         $item['body'] = str_replace($mtch[0], '[img]' . $img_url . '[/img]', $item['body']);
3486                                 }
3487                         }
3488                 }
3489         }
3490
3491         /**
3492          * @brief Given an item array, convert the body element from bbcode to html and add smilie icons.
3493          * If attach is true, also add icons for item attachments.
3494          *
3495          * @param array   $item
3496          * @param boolean $attach
3497          * @param boolean $is_preview
3498          * @return string item body html
3499          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
3500          * @throws \ImagickException
3501          * @hook  prepare_body_init item array before any work
3502          * @hook  prepare_body_content_filter ('item'=>item array, 'filter_reasons'=>string array) before first bbcode to html
3503          * @hook  prepare_body ('item'=>item array, 'html'=>body string, 'is_preview'=>boolean, 'filter_reasons'=>string array) after first bbcode to html
3504          * @hook  prepare_body_final ('item'=>item array, 'html'=>body string) after attach icons and blockquote special case handling (spoiler, author)
3505          */
3506         public static function prepareBody(array &$item, $attach = false, $is_preview = false)
3507         {
3508                 $a = self::getApp();
3509                 Hook::callAll('prepare_body_init', $item);
3510
3511                 // In order to provide theme developers more possibilities, event items
3512                 // are treated differently.
3513                 if ($item['object-type'] === Activity\ObjectType::EVENT && isset($item['event-id'])) {
3514                         $ev = Event::getItemHTML($item);
3515                         return $ev;
3516                 }
3517
3518                 $tags = Term::populateTagsFromItem($item);
3519
3520                 $item['tags'] = $tags['tags'];
3521                 $item['hashtags'] = $tags['hashtags'];
3522                 $item['mentions'] = $tags['mentions'];
3523
3524                 // Compile eventual content filter reasons
3525                 $filter_reasons = [];
3526                 if (!$is_preview && public_contact() != $item['author-id']) {
3527                         if (!empty($item['content-warning']) && (!local_user() || !PConfig::get(local_user(), 'system', 'disable_cw', false))) {
3528                                 $filter_reasons[] = L10n::t('Content warning: %s', $item['content-warning']);
3529                         }
3530
3531                         $hook_data = [
3532                                 'item' => $item,
3533                                 'filter_reasons' => $filter_reasons
3534                         ];
3535                         Hook::callAll('prepare_body_content_filter', $hook_data);
3536                         $filter_reasons = $hook_data['filter_reasons'];
3537                         unset($hook_data);
3538                 }
3539
3540                 // Update the cached values if there is no "zrl=..." on the links.
3541                 $update = (!Session::isAuthenticated() && ($item["uid"] == 0));
3542
3543                 // Or update it if the current viewer is the intented viewer.
3544                 if (($item["uid"] == local_user()) && ($item["uid"] != 0)) {
3545                         $update = true;
3546                 }
3547
3548                 self::putInCache($item, $update);
3549                 $s = $item["rendered-html"];
3550
3551                 $hook_data = [
3552                         'item' => $item,
3553                         'html' => $s,
3554                         'preview' => $is_preview,
3555                         'filter_reasons' => $filter_reasons
3556                 ];
3557                 Hook::callAll('prepare_body', $hook_data);
3558                 $s = $hook_data['html'];
3559                 unset($hook_data);
3560
3561                 if (!$attach) {
3562                         // Replace the blockquotes with quotes that are used in mails.
3563                         $mailquote = '<blockquote type="cite" class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">';
3564                         $s = str_replace(['<blockquote>', '<blockquote class="spoiler">', '<blockquote class="author">'], [$mailquote, $mailquote, $mailquote], $s);
3565                         return $s;
3566                 }
3567
3568                 $as = '';
3569                 $vhead = false;
3570                 $matches = [];
3571                 preg_match_all('|\[attach\]href=\"(.*?)\" length=\"(.*?)\" type=\"(.*?)\"(?: title=\"(.*?)\")?|', $item['attach'], $matches, PREG_SET_ORDER);
3572                 foreach ($matches as $mtch) {
3573                         $mime = $mtch[3];
3574
3575                         $the_url = Contact::magicLinkById($item['author-id'], $mtch[1]);
3576
3577                         if (strpos($mime, 'video') !== false) {
3578                                 if (!$vhead) {
3579                                         $vhead = true;
3580                                         $a->page['htmlhead'] .= Renderer::replaceMacros(Renderer::getMarkupTemplate('videos_head.tpl'));
3581                                 }
3582
3583                                 $url_parts = explode('/', $the_url);
3584                                 $id = end($url_parts);
3585                                 $as .= Renderer::replaceMacros(Renderer::getMarkupTemplate('video_top.tpl'), [
3586                                         '$video' => [
3587                                                 'id'     => $id,
3588                                                 'title'  => L10n::t('View Video'),
3589                                                 'src'    => $the_url,
3590                                                 'mime'   => $mime,
3591                                         ],
3592                                 ]);
3593                         }
3594
3595                         $filetype = strtolower(substr($mime, 0, strpos($mime, '/')));
3596                         if ($filetype) {
3597                                 $filesubtype = strtolower(substr($mime, strpos($mime, '/') + 1));
3598                                 $filesubtype = str_replace('.', '-', $filesubtype);
3599                         } else {
3600                                 $filetype = 'unkn';
3601                                 $filesubtype = 'unkn';
3602                         }
3603
3604                         $title = Strings::escapeHtml(trim(($mtch[4] ?? '') ?: $mtch[1]));
3605                         $title .= ' ' . $mtch[2] . ' ' . L10n::t('bytes');
3606
3607                         $icon = '<div class="attachtype icon s22 type-' . $filetype . ' subtype-' . $filesubtype . '"></div>';
3608                         $as .= '<a href="' . strip_tags($the_url) . '" title="' . $title . '" class="attachlink" target="_blank" >' . $icon . '</a>';
3609                 }
3610
3611                 if ($as != '') {
3612                         $s .= '<div class="body-attach">'.$as.'<div class="clear"></div></div>';
3613                 }
3614
3615                 // Map.
3616                 if (strpos($s, '<div class="map">') !== false && !empty($item['coord'])) {
3617                         $x = Map::byCoordinates(trim($item['coord']));
3618                         if ($x) {
3619                                 $s = preg_replace('/\<div class\=\"map\"\>/', '$0' . $x, $s);
3620                         }
3621                 }
3622
3623                 // Replace friendica image url size with theme preference.
3624                 if (!empty($a->theme_info['item_image_size'])) {
3625                         $ps = $a->theme_info['item_image_size'];
3626                         $s = preg_replace('|(<img[^>]+src="[^"]+/photo/[0-9a-f]+)-[0-9]|', "$1-" . $ps, $s);
3627                 }
3628
3629                 $s = HTML::applyContentFilter($s, $filter_reasons);
3630
3631                 $hook_data = ['item' => $item, 'html' => $s];
3632                 Hook::callAll('prepare_body_final', $hook_data);
3633
3634                 return $hook_data['html'];
3635         }
3636
3637         /**
3638          * get private link for item
3639          *
3640          * @param array $item
3641          * @return boolean|array False if item has not plink, otherwise array('href'=>plink url, 'title'=>translated title)
3642          * @throws \Exception
3643          */
3644         public static function getPlink($item)
3645         {
3646                 $a = self::getApp();
3647
3648                 if ($a->user['nickname'] != "") {
3649                         $ret = [
3650                                 'href' => "display/" . $item['guid'],
3651                                 'orig' => "display/" . $item['guid'],
3652                                 'title' => L10n::t('View on separate page'),
3653                                 'orig_title' => L10n::t('view on separate page'),
3654                         ];
3655
3656                         if (!empty($item['plink'])) {
3657                                 $ret["href"] = $a->removeBaseURL($item['plink']);
3658                                 $ret["title"] = L10n::t('link to source');
3659                         }
3660
3661                 } elseif (!empty($item['plink']) && ($item['private'] != 1)) {
3662                         $ret = [
3663                                 'href' => $item['plink'],
3664                                 'orig' => $item['plink'],
3665                                 'title' => L10n::t('link to source'),
3666                         ];
3667                 } else {
3668                         $ret = [];
3669                 }
3670
3671                 return $ret;
3672         }
3673
3674         /**
3675          * Is the given item array a post that is sent as starting post to a forum?
3676          *
3677          * @param array $item
3678          * @param array $owner
3679          *
3680          * @return boolean "true" when it is a forum post
3681          */
3682         public static function isForumPost(array $item, array $owner = [])
3683         {
3684                 if (empty($owner)) {
3685                         $owner = User::getOwnerDataById($item['uid']);
3686                         if (empty($owner)) {
3687                                 return false;
3688                         }
3689                 }
3690
3691                 if (($item['author-id'] == $item['owner-id']) ||
3692                         ($owner['id'] == $item['contact-id']) ||
3693                         ($item['uri'] != $item['parent-uri']) ||
3694                         $item['origin']) {
3695                         return false;
3696                 }
3697
3698                 return Contact::isForum($item['contact-id']);
3699         }
3700
3701         /**
3702          * Search item id for given URI or plink
3703          *
3704          * @param string $uri
3705          * @param integer $uid
3706          *
3707          * @return integer item id
3708          */
3709         public static function searchByLink($uri, $uid = 0)
3710         {
3711                 $ssl_uri = str_replace('http://', 'https://', $uri);
3712                 $uris = [$uri, $ssl_uri, Strings::normaliseLink($uri)];
3713
3714                 $item = DBA::selectFirst('item', ['id'], ['uri' => $uris, 'uid' => $uid]);
3715                 if (DBA::isResult($item)) {
3716                         return $item['id'];
3717                 }
3718
3719                 $itemcontent = DBA::selectFirst('item-content', ['uri-id'], ['plink' => $uris]);
3720                 if (!DBA::isResult($itemcontent)) {
3721                         return 0;
3722                 }
3723
3724                 $itemuri = DBA::selectFirst('item-uri', ['uri'], ['id' => $itemcontent['uri-id']]);
3725                 if (!DBA::isResult($itemuri)) {
3726                         return 0;
3727                 }
3728
3729                 $item = DBA::selectFirst('item', ['id'], ['uri' => $itemuri['uri'], 'uid' => $uid]);
3730                 if (DBA::isResult($item)) {
3731                         return $item['id'];
3732                 }
3733
3734                 return 0;
3735         }
3736
3737         /**
3738          * Fetches item for given URI or plink
3739          *
3740          * @param string $uri
3741          * @param integer $uid
3742          *
3743          * @return integer item id
3744          */
3745         public static function fetchByLink($uri, $uid = 0)
3746         {
3747                 $item_id = self::searchByLink($uri, $uid);
3748                 if (!empty($item_id)) {
3749                         return $item_id;
3750                 }
3751
3752                 if (ActivityPub\Processor::fetchMissingActivity($uri)) {
3753                         $item_id = self::searchByLink($uri, $uid);
3754                 } else {
3755                         $item_id = Diaspora::fetchByURL($uri);
3756                 }
3757
3758                 if (!empty($item_id)) {
3759                         return $item_id;
3760                 }
3761
3762                 return 0;
3763         }
3764 }