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 a target - but having tags or files.
 295                         // We safe some performance by building tag and file strings only here.
 296                         // We remove the target since they aren't used for this type.
 297                         // In mail posts we do store some mail header data in the object.
 298                         if (array_key_exists('target', $row)) {
 299                                 $row['target'] = '';
 300                         }
 301                 }
 302
 303                 if (!array_key_exists('verb', $row) || in_array($row['verb'], ['', Activity::POST, Activity::SHARE])) {
 304                         // Build the tag string out of the term entries
 305                         if (array_key_exists('tag', $row) && empty($row['tag'])) {
 306                                 $row['tag'] = Term::tagTextFromItemId($row['internal-iid']);
 307                         }
 308
 309                         // Build the file string out of the term entries
 310                         if (array_key_exists('file', $row) && empty($row['file'])) {
 311                                 $row['file'] = Term::fileTextFromItemId($row['internal-iid']);
 312                         }
 313                 }
 314
 315                 if (array_key_exists('signed_text', $row) && array_key_exists('interaction', $row) && !is_null($row['interaction'])) {
 316                         $row['signed_text'] = $row['interaction'];
 317                 }
 318
 319                 if (array_key_exists('ignored', $row) && array_key_exists('internal-user-ignored', $row) && !is_null($row['internal-user-ignored'])) {
 320                         $row['ignored'] = $row['internal-user-ignored'];
 321                 }
 322
 323                 // Remove internal fields
 324                 unset($row['internal-activity']);
 325                 unset($row['internal-network']);
 326                 unset($row['internal-iid']);
 327                 unset($row['internal-iaid']);
 328                 unset($row['internal-icid']);
 329                 unset($row['internal-user-ignored']);
 330                 unset($row['interaction']);
 331
 332                 return $row;
 333         }
 334
 335         /**
 336          * @brief Fills an array with data from an item query
 337          *
 338          * @param object $stmt statement object
 339          * @param bool   $do_close
 340          * @return array Data array
 341          */
 342         public static function inArray($stmt, $do_close = true) {
 343                 if (is_bool($stmt)) {
 344                         return $stmt;
 345                 }
 346
 347                 $data = [];
 348                 while ($row = self::fetch($stmt)) {
 349                         $data[] = $row;
 350                 }
 351                 if ($do_close) {
 352                         DBA::close($stmt);
 353                 }
 354                 return $data;
 355         }
 356
 357         /**
 358          * @brief Check if item data exists
 359          *
 360          * @param array $condition array of fields for condition
 361          *
 362          * @return boolean Are there rows for that condition?
 363          * @throws \Exception
 364          */
 365         public static function exists($condition) {
 366                 $stmt = self::select(['id'], $condition, ['limit' => 1]);
 367
 368                 if (is_bool($stmt)) {
 369                         $retval = $stmt;
 370                 } else {
 371                         $retval = (DBA::numRows($stmt) > 0);
 372                 }
 373
 374                 DBA::close($stmt);
 375
 376                 return $retval;
 377         }
 378
 379         /**
 380          * Retrieve a single record from the item table for a given user and returns it in an associative array
 381          *
 382          * @brief Retrieve a single record from a table
 383          * @param integer $uid User ID
 384          * @param array   $selected
 385          * @param array   $condition
 386          * @param array   $params
 387          * @return bool|array
 388          * @throws \Exception
 389          * @see   DBA::select
 390          */
 391         public static function selectFirstForUser($uid, array $selected = [], array $condition = [], $params = [])
 392         {
 393                 $params['uid'] = $uid;
 394
 395                 if (empty($selected)) {
 396                         $selected = Item::DISPLAY_FIELDLIST;
 397                 }
 398
 399                 return self::selectFirst($selected, $condition, $params);
 400         }
 401
 402         /**
 403          * @brief Select rows from the item table for a given user
 404          *
 405          * @param integer $uid       User ID
 406          * @param array   $selected  Array of selected fields, empty for all
 407          * @param array   $condition Array of fields for condition
 408          * @param array   $params    Array of several parameters
 409          *
 410          * @return boolean|object
 411          * @throws \Exception
 412          */
 413         public static function selectForUser($uid, array $selected = [], array $condition = [], $params = [])
 414         {
 415                 $params['uid'] = $uid;
 416
 417                 if (empty($selected)) {
 418                         $selected = Item::DISPLAY_FIELDLIST;
 419                 }
 420
 421                 return self::select($selected, $condition, $params);
 422         }
 423
 424         /**
 425          * Retrieve a single record from the item table and returns it in an associative array
 426          *
 427          * @brief Retrieve a single record from a table
 428          * @param array $fields
 429          * @param array $condition
 430          * @param array $params
 431          * @return bool|array
 432          * @throws \Exception
 433          * @see   DBA::select
 434          */
 435         public static function selectFirst(array $fields = [], array $condition = [], $params = [])
 436         {
 437                 $params['limit'] = 1;
 438
 439                 $result = self::select($fields, $condition, $params);
 440
 441                 if (is_bool($result)) {
 442                         return $result;
 443                 } else {
 444                         $row = self::fetch($result);
 445                         DBA::close($result);
 446                         return $row;
 447                 }
 448         }
 449
 450         /**
 451          * @brief Select rows from the item table and returns them as an array
 452          *
 453          * @param array $selected  Array of selected fields, empty for all
 454          * @param array $condition Array of fields for condition
 455          * @param array $params    Array of several parameters
 456          *
 457          * @return array
 458          * @throws \Exception
 459          */
 460         public static function selectToArray(array $fields = [], array $condition = [], $params = [])
 461         {
 462                 $result = self::select($fields, $condition, $params);
 463
 464                 if (is_bool($result)) {
 465                         return [];
 466                 }
 467
 468                 $data = [];
 469                 while ($row = self::fetch($result)) {
 470                         $data[] = $row;
 471                 }
 472                 DBA::close($result);
 473
 474                 return $data;
 475         }
 476
 477         /**
 478          * @brief Select rows from the item table
 479          *
 480          * @param array $selected  Array of selected fields, empty for all
 481          * @param array $condition Array of fields for condition
 482          * @param array $params    Array of several parameters
 483          *
 484          * @return boolean|object
 485          * @throws \Exception
 486          */
 487         public static function select(array $selected = [], array $condition = [], $params = [])
 488         {
 489                 $uid = 0;
 490                 $usermode = false;
 491
 492                 if (isset($params['uid'])) {
 493                         $uid = $params['uid'];
 494                         $usermode = true;
 495                 }
 496
 497                 $fields = self::fieldlist($usermode);
 498
 499                 $select_fields = self::constructSelectFields($fields, $selected);
 500
 501                 $condition_string = DBA::buildCondition($condition);
 502
 503                 $condition_string = self::addTablesToFields($condition_string, $fields);
 504
 505                 if ($usermode) {
 506                         $condition_string = $condition_string . ' AND ' . self::condition(false);
 507                 }
 508
 509                 $param_string = self::addTablesToFields(DBA::buildParameter($params), $fields);
 510
 511                 $table = "`item` " . self::constructJoins($uid, $select_fields . $condition_string . $param_string, false, $usermode);
 512
 513                 $sql = "SELECT " . $select_fields . " FROM " . $table . $condition_string . $param_string;
 514
 515                 return DBA::p($sql, $condition);
 516         }
 517
 518         /**
 519          * @brief Select rows from the starting post in the item table
 520          *
 521          * @param integer $uid       User ID
 522          * @param array   $selected
 523          * @param array   $condition Array of fields for condition
 524          * @param array   $params    Array of several parameters
 525          *
 526          * @return boolean|object
 527          * @throws \Exception
 528          */
 529         public static function selectThreadForUser($uid, array $selected = [], array $condition = [], $params = [])
 530         {
 531                 $params['uid'] = $uid;
 532
 533                 if (empty($selected)) {
 534                         $selected = Item::DISPLAY_FIELDLIST;
 535                 }
 536
 537                 return self::selectThread($selected, $condition, $params);
 538         }
 539
 540         /**
 541          * Retrieve a single record from the starting post in the item table and returns it in an associative array
 542          *
 543          * @brief Retrieve a single record from a table
 544          * @param integer $uid User ID
 545          * @param array   $selected
 546          * @param array   $condition
 547          * @param array   $params
 548          * @return bool|array
 549          * @throws \Exception
 550          * @see   DBA::select
 551          */
 552         public static function selectFirstThreadForUser($uid, array $selected = [], array $condition = [], $params = [])
 553         {
 554                 $params['uid'] = $uid;
 555
 556                 if (empty($selected)) {
 557                         $selected = Item::DISPLAY_FIELDLIST;
 558                 }
 559
 560                 return self::selectFirstThread($selected, $condition, $params);
 561         }
 562
 563         /**
 564          * Retrieve a single record from the starting post in the item table and returns it in an associative array
 565          *
 566          * @brief Retrieve a single record from a table
 567          * @param array $fields
 568          * @param array $condition
 569          * @param array $params
 570          * @return bool|array
 571          * @throws \Exception
 572          * @see   DBA::select
 573          */
 574         public static function selectFirstThread(array $fields = [], array $condition = [], $params = [])
 575         {
 576                 $params['limit'] = 1;
 577                 $result = self::selectThread($fields, $condition, $params);
 578
 579                 if (is_bool($result)) {
 580                         return $result;
 581                 } else {
 582                         $row = self::fetch($result);
 583                         DBA::close($result);
 584                         return $row;
 585                 }
 586         }
 587
 588         /**
 589          * @brief Select rows from the starting post in the item table
 590          *
 591          * @param array $selected  Array of selected fields, empty for all
 592          * @param array $condition Array of fields for condition
 593          * @param array $params    Array of several parameters
 594          *
 595          * @return boolean|object
 596          * @throws \Exception
 597          */
 598         public static function selectThread(array $selected = [], array $condition = [], $params = [])
 599         {
 600                 $uid = 0;
 601                 $usermode = false;
 602
 603                 if (isset($params['uid'])) {
 604                         $uid = $params['uid'];
 605                         $usermode = true;
 606                 }
 607
 608                 $fields = self::fieldlist($usermode);
 609
 610                 $fields['thread'] = ['mention', 'ignored', 'iid'];
 611
 612                 $threadfields = ['thread' => ['iid', 'uid', 'contact-id', 'owner-id', 'author-id',
 613                         'created', 'edited', 'commented', 'received', 'changed', 'wall', 'private',
 614                         'pubmail', 'moderated', 'visible', 'starred', 'ignored', 'post-type',
 615                         'unseen', 'deleted', 'origin', 'forum_mode', 'mention', 'network']];
 616
 617                 $select_fields = self::constructSelectFields($fields, $selected);
 618
 619                 $condition_string = DBA::buildCondition($condition);
 620
 621                 $condition_string = self::addTablesToFields($condition_string, $threadfields);
 622                 $condition_string = self::addTablesToFields($condition_string, $fields);
 623
 624                 if ($usermode) {
 625                         $condition_string = $condition_string . ' AND ' . self::condition(true);
 626                 }
 627
 628                 $param_string = DBA::buildParameter($params);
 629                 $param_string = self::addTablesToFields($param_string, $threadfields);
 630                 $param_string = self::addTablesToFields($param_string, $fields);
 631
 632                 $table = "`thread` " . self::constructJoins($uid, $select_fields . $condition_string . $param_string, true, $usermode);
 633
 634                 $sql = "SELECT " . $select_fields . " FROM " . $table . $condition_string . $param_string;
 635
 636                 return DBA::p($sql, $condition);
 637         }
 638
 639         /**
 640          * @brief Returns a list of fields that are associated with the item table
 641          *
 642          * @param $usermode
 643          * @return array field list
 644          */
 645         private static function fieldlist($usermode)
 646         {
 647                 $fields = [];
 648
 649                 $fields['item'] = ['id', 'uid', 'parent', 'uri', 'parent-uri', 'thr-parent', 'guid',
 650                         'contact-id', 'owner-id', 'author-id', 'type', 'wall', 'gravity', 'extid',
 651                         'created', 'edited', 'commented', 'received', 'changed', 'psid',
 652                         'resource-id', 'event-id', 'tag', 'attach', 'post-type', 'file',
 653                         'private', 'pubmail', 'moderated', 'visible', 'starred', 'bookmark',
 654                         'unseen', 'deleted', 'origin', 'forum_mode', 'mention', 'global',
 655                         'id' => 'item_id', 'network', 'icid', 'iaid', 'id' => 'internal-iid',
 656                         'network' => 'internal-network', 'icid' => 'internal-icid',
 657                         'iaid' => 'internal-iaid'];
 658
 659                 if ($usermode) {
 660                         $fields['user-item'] = ['pinned', 'ignored' => 'internal-user-ignored'];
 661                 }
 662
 663                 $fields['item-activity'] = ['activity', 'activity' => 'internal-activity'];
 664
 665                 $fields['item-content'] = array_merge(self::CONTENT_FIELDLIST, self::MIXED_CONTENT_FIELDLIST);
 666
 667                 $fields['item-delivery-data'] = array_merge(ItemDeliveryData::LEGACY_FIELD_LIST, ItemDeliveryData::FIELD_LIST);
 668
 669                 $fields['permissionset'] = ['allow_cid', 'allow_gid', 'deny_cid', 'deny_gid'];
 670
 671                 $fields['author'] = ['url' => 'author-link', 'name' => 'author-name', 'addr' => 'author-addr',
 672                         'thumb' => 'author-avatar', 'nick' => 'author-nick', 'network' => 'author-network'];
 673
 674                 $fields['owner'] = ['url' => 'owner-link', 'name' => 'owner-name', 'addr' => 'owner-addr',
 675                         'thumb' => 'owner-avatar', 'nick' => 'owner-nick', 'network' => 'owner-network'];
 676
 677                 $fields['contact'] = ['url' => 'contact-link', 'name' => 'contact-name', 'thumb' => 'contact-avatar',
 678                         'writable', 'self', 'id' => 'cid', 'alias', 'uid' => 'contact-uid',
 679                         'photo', 'name-date', 'uri-date', 'avatar-date', 'thumb', 'dfrn-id'];
 680
 681                 $fields['parent-item'] = ['guid' => 'parent-guid', 'network' => 'parent-network'];
 682
 683                 $fields['parent-item-author'] = ['url' => 'parent-author-link', 'name' => 'parent-author-name'];
 684
 685                 $fields['event'] = ['created' => 'event-created', 'edited' => 'event-edited',
 686                         'start' => 'event-start','finish' => 'event-finish',
 687                         'summary' => 'event-summary','desc' => 'event-desc',
 688                         'location' => 'event-location', 'type' => 'event-type',
 689                         'nofinish' => 'event-nofinish','adjust' => 'event-adjust',
 690                         'ignore' => 'event-ignore', 'id' => 'event-id'];
 691
 692                 $fields['sign'] = ['signed_text', 'signature', 'signer'];
 693
 694                 $fields['diaspora-interaction'] = ['interaction'];
 695
 696                 return $fields;
 697         }
 698
 699         /**
 700          * @brief Returns SQL condition for the "select" functions
 701          *
 702          * @param boolean $thread_mode Called for the items (false) or for the threads (true)
 703          *
 704          * @return string SQL condition
 705          */
 706         private static function condition($thread_mode)
 707         {
 708                 if ($thread_mode) {
 709                         $master_table = "`thread`";
 710                 } else {
 711                         $master_table = "`item`";
 712                 }
 713                 return sprintf("$master_table.`visible` AND NOT $master_table.`deleted` AND NOT $master_table.`moderated`
 714                         AND (`user-item`.`hidden` IS NULL OR NOT `user-item`.`hidden`)
 715                         AND (`user-author`.`blocked` IS NULL OR NOT `user-author`.`blocked`)
 716                         AND (`user-author`.`ignored` IS NULL OR NOT `user-author`.`ignored` OR `item`.`gravity` != %d)
 717                         AND (`user-owner`.`blocked` IS NULL OR NOT `user-owner`.`blocked`)
 718                         AND (`user-owner`.`ignored` IS NULL OR NOT `user-owner`.`ignored` OR `item`.`gravity` != %d) ",
 719                         GRAVITY_PARENT, GRAVITY_PARENT);
 720         }
 721
 722         /**
 723          * @brief Returns all needed "JOIN" commands for the "select" functions
 724          *
 725          * @param integer $uid          User ID
 726          * @param string  $sql_commands The parts of the built SQL commands in the "select" functions
 727          * @param boolean $thread_mode  Called for the items (false) or for the threads (true)
 728          *
 729          * @param         $user_mode
 730          * @return string The SQL joins for the "select" functions
 731          */
 732         private static function constructJoins($uid, $sql_commands, $thread_mode, $user_mode)
 733         {
 734                 if ($thread_mode) {
 735                         $master_table = "`thread`";
 736                         $master_table_key = "`thread`.`iid`";
 737                         $joins = "STRAIGHT_JOIN `item` ON `item`.`id` = `thread`.`iid` ";
 738                 } else {
 739                         $master_table = "`item`";
 740                         $master_table_key = "`item`.`id`";
 741                         $joins = '';
 742                 }
 743
 744                 if ($user_mode) {
 745                         $joins .= sprintf("STRAIGHT_JOIN `contact` ON `contact`.`id` = $master_table.`contact-id`
 746                                 AND NOT `contact`.`blocked`
 747                                 AND ((NOT `contact`.`readonly` AND NOT `contact`.`pending` AND (`contact`.`rel` IN (%s, %s)))
 748                                 OR `contact`.`self` OR `item`.`gravity` != %d OR `contact`.`uid` = 0)
 749                                 STRAIGHT_JOIN `contact` AS `author` ON `author`.`id` = $master_table.`author-id` AND NOT `author`.`blocked`
 750                                 STRAIGHT_JOIN `contact` AS `owner` ON `owner`.`id` = $master_table.`owner-id` AND NOT `owner`.`blocked`
 751                                 LEFT JOIN `user-item` ON `user-item`.`iid` = $master_table_key AND `user-item`.`uid` = %d
 752                                 LEFT JOIN `user-contact` AS `user-author` ON `user-author`.`cid` = $master_table.`author-id` AND `user-author`.`uid` = %d
 753                                 LEFT JOIN `user-contact` AS `user-owner` ON `user-owner`.`cid` = $master_table.`owner-id` AND `user-owner`.`uid` = %d",
 754                                 Contact::SHARING, Contact::FRIEND, GRAVITY_PARENT, intval($uid), intval($uid), intval($uid));
 755                 } else {
 756                         if (strpos($sql_commands, "`contact`.") !== false) {
 757                                 $joins .= "LEFT JOIN `contact` ON `contact`.`id` = $master_table.`contact-id`";
 758                         }
 759                         if (strpos($sql_commands, "`author`.") !== false) {
 760                                 $joins .= " LEFT JOIN `contact` AS `author` ON `author`.`id` = $master_table.`author-id`";
 761                         }
 762                         if (strpos($sql_commands, "`owner`.") !== false) {
 763                                 $joins .= " LEFT JOIN `contact` AS `owner` ON `owner`.`id` = $master_table.`owner-id`";
 764                         }
 765                 }
 766
 767                 if (strpos($sql_commands, "`group_member`.") !== false) {
 768                         $joins .= " STRAIGHT_JOIN `group_member` ON `group_member`.`contact-id` = $master_table.`contact-id`";
 769                 }
 770
 771                 if (strpos($sql_commands, "`user`.") !== false) {
 772                         $joins .= " STRAIGHT_JOIN `user` ON `user`.`uid` = $master_table.`uid`";
 773                 }
 774
 775                 if (strpos($sql_commands, "`event`.") !== false) {
 776                         $joins .= " LEFT JOIN `event` ON `event-id` = `event`.`id`";
 777                 }
 778
 779                 if (strpos($sql_commands, "`sign`.") !== false) {
 780                         $joins .= " LEFT JOIN `sign` ON `sign`.`iid` = `item`.`id`";
 781                 }
 782
 783                 if (strpos($sql_commands, "`diaspora-interaction`.") !== false) {
 784                         $joins .= " LEFT JOIN `diaspora-interaction` ON `diaspora-interaction`.`uri-id` = `item`.`uri-id`";
 785                 }
 786
 787                 if (strpos($sql_commands, "`item-activity`.") !== false) {
 788                         $joins .= " LEFT JOIN `item-activity` ON `item-activity`.`uri-id` = `item`.`uri-id`";
 789                 }
 790
 791                 if (strpos($sql_commands, "`item-content`.") !== false) {
 792                         $joins .= " LEFT JOIN `item-content` ON `item-content`.`uri-id` = `item`.`uri-id`";
 793                 }
 794
 795                 if (strpos($sql_commands, "`item-delivery-data`.") !== false) {
 796                         $joins .= " LEFT JOIN `item-delivery-data` ON `item-delivery-data`.`iid` = `item`.`id`";
 797                 }
 798
 799                 if (strpos($sql_commands, "`permissionset`.") !== false) {
 800                         $joins .= " LEFT JOIN `permissionset` ON `permissionset`.`id` = `item`.`psid`";
 801                 }
 802
 803                 if ((strpos($sql_commands, "`parent-item`.") !== false) || (strpos($sql_commands, "`parent-author`.") !== false)) {
 804                         $joins .= " STRAIGHT_JOIN `item` AS `parent-item` ON `parent-item`.`id` = `item`.`parent`";
 805                 }
 806
 807                 if (strpos($sql_commands, "`parent-item-author`.") !== false) {
 808                         $joins .= " STRAIGHT_JOIN `contact` AS `parent-item-author` ON `parent-item-author`.`id` = `parent-item`.`author-id`";
 809                 }
 810
 811                 return $joins;
 812         }
 813
 814         /**
 815          * @brief Add the field list for the "select" functions
 816          *
 817          * @param array $fields The field definition array
 818          * @param array $selected The array with the selected fields from the "select" functions
 819          *
 820          * @return string The field list
 821          */
 822         private static function constructSelectFields($fields, $selected)
 823         {
 824                 if (!empty($selected)) {
 825                         $selected[] = 'internal-iid';
 826                         $selected[] = 'internal-iaid';
 827                         $selected[] = 'internal-icid';
 828                         $selected[] = 'internal-network';
 829                 }
 830
 831                 if (in_array('verb', $selected)) {
 832                         $selected[] = 'internal-activity';
 833                 }
 834
 835                 if (in_array('ignored', $selected)) {
 836                         $selected[] = 'internal-user-ignored';
 837                 }
 838
 839                 if (in_array('signed_text', $selected)) {
 840                         $selected[] = 'interaction';
 841                 }
 842
 843                 $legacy_fields = array_merge(ItemDeliveryData::LEGACY_FIELD_LIST, self::MIXED_CONTENT_FIELDLIST);
 844
 845                 $selection = [];
 846                 foreach ($fields as $table => $table_fields) {
 847                         foreach ($table_fields as $field => $select) {
 848                                 if (empty($selected) || in_array($select, $selected)) {
 849                                         if (self::isLegacyMode() && in_array($select, $legacy_fields)) {
 850                                                 $selection[] = "`item`.`".$select."` AS `internal-item-" . $select . "`";
 851                                         }
 852                                         if (is_int($field)) {
 853                                                 $selection[] = "`" . $table . "`.`" . $select . "`";
 854                                         } else {
 855                                                 $selection[] = "`" . $table . "`.`" . $field . "` AS `" . $select . "`";
 856                                         }
 857                                 }
 858                         }
 859                 }
 860                 return implode(", ", $selection);
 861         }
 862
 863         /**
 864          * @brief add table definition to fields in an SQL query
 865          *
 866          * @param string $query SQL query
 867          * @param array $fields The field definition array
 868          *
 869          * @return string the changed SQL query
 870          */
 871         private static function addTablesToFields($query, $fields)
 872         {
 873                 foreach ($fields as $table => $table_fields) {
 874                         foreach ($table_fields as $alias => $field) {
 875                                 if (is_int($alias)) {
 876                                         $replace_field = $field;
 877                                 } else {
 878                                         $replace_field = $alias;
 879                                 }
 880
 881                                 $search = "/([^\.])`" . $field . "`/i";
 882                                 $replace = "$1`" . $table . "`.`" . $replace_field . "`";
 883                                 $query = preg_replace($search, $replace, $query);
 884                         }
 885                 }
 886                 return $query;
 887         }
 888
 889         /**
 890          * @brief Update existing item entries
 891          *
 892          * @param array $fields    The fields that are to be changed
 893          * @param array $condition The condition for finding the item entries
 894          *
 895          * In the future we may have to change permissions as well.
 896          * Then we had to add the user id as third parameter.
 897          *
 898          * A return value of "0" doesn't mean an error - but that 0 rows had been changed.
 899          *
 900          * @return integer|boolean number of affected rows - or "false" if there was an error
 901          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 902          */
 903         public static function update(array $fields, array $condition)
 904         {
 905                 if (empty($condition) || empty($fields)) {
 906                         return false;
 907                 }
 908
 909                 // To ensure the data integrity we do it in an transaction
 910                 DBA::transaction();
 911
 912                 // We cannot simply expand the condition to check for origin entries
 913                 // The condition needn't to be a simple array but could be a complex condition.
 914                 // And we have to execute this query before the update to ensure to fetch the same data.
 915                 $items = DBA::select('item', ['id', 'origin', 'uri', 'uri-id', 'iaid', 'icid', 'tag', 'file'], $condition);
 916
 917                 $content_fields = [];
 918                 foreach (array_merge(self::CONTENT_FIELDLIST, self::MIXED_CONTENT_FIELDLIST) as $field) {
 919                         if (isset($fields[$field])) {
 920                                 $content_fields[$field] = $fields[$field];
 921                                 if (in_array($field, self::CONTENT_FIELDLIST) || !self::isLegacyMode()) {
 922                                         unset($fields[$field]);
 923                                 } else {
 924                                         $fields[$field] = null;
 925                                 }
 926                         }
 927                 }
 928
 929                 $delivery_data = ItemDeliveryData::extractFields($fields);
 930
 931                 $clear_fields = ['bookmark', 'type', 'author-name', 'author-avatar', 'author-link', 'owner-name', 'owner-avatar', 'owner-link', 'postopts', 'inform'];
 932                 foreach ($clear_fields as $field) {
 933                         if (array_key_exists($field, $fields)) {
 934                                 $fields[$field] = null;
 935                         }
 936                 }
 937
 938                 if (array_key_exists('tag', $fields)) {
 939                         $tags = $fields['tag'];
 940                         $fields['tag'] = null;
 941                 } else {
 942                         $tags = null;
 943                 }
 944
 945                 if (array_key_exists('file', $fields)) {
 946                         $files = $fields['file'];
 947                         $fields['file'] = null;
 948                 } else {
 949                         $files = null;
 950                 }
 951
 952                 if (!empty($fields)) {
 953                         $success = DBA::update('item', $fields, $condition);
 954
 955                         if (!$success) {
 956                                 DBA::close($items);
 957                                 DBA::rollback();
 958                                 return false;
 959                         }
 960                 }
 961
 962                 // When there is no content for the "old" item table, this will count the fetched items
 963                 $rows = DBA::affectedRows();
 964
 965                 $notify_items = [];
 966
 967                 while ($item = DBA::fetch($items)) {
 968                         if (!empty($item['iaid']) || (!empty($content_fields['verb']) && (self::activityToIndex($content_fields['verb']) >= 0))) {
 969                                 self::updateActivity($content_fields, ['uri-id' => $item['uri-id']]);
 970
 971                                 if (empty($item['iaid'])) {
 972                                         $item_activity = DBA::selectFirst('item-activity', ['id'], ['uri-id' => $item['uri-id']]);
 973                                         if (DBA::isResult($item_activity)) {
 974                                                 $item_fields = ['iaid' => $item_activity['id'], 'icid' => null];
 975                                                 foreach (self::MIXED_CONTENT_FIELDLIST as $field) {
 976                                                         if (self::isLegacyMode()) {
 977                                                                 $item_fields[$field] = null;
 978                                                         } else {
 979                                                                 unset($item_fields[$field]);
 980                                                         }
 981                                                 }
 982                                                 DBA::update('item', $item_fields, ['id' => $item['id']]);
 983
 984                                                 if (!empty($item['icid']) && !DBA::exists('item', ['icid' => $item['icid']])) {
 985                                                         DBA::delete('item-content', ['id' => $item['icid']]);
 986                                                 }
 987                                         }
 988                                 } elseif (!empty($item['icid'])) {
 989                                         DBA::update('item', ['icid' => null], ['id' => $item['id']]);
 990
 991                                         if (!DBA::exists('item', ['icid' => $item['icid']])) {
 992                                                 DBA::delete('item-content', ['id' => $item['icid']]);
 993                                         }
 994                                 }
 995                         } else {
 996                                 self::updateContent($content_fields, ['uri-id' => $item['uri-id']]);
 997
 998                                 if (empty($item['icid'])) {
 999                                         $item_content = DBA::selectFirst('item-content', [], ['uri-id' => $item['uri-id']]);
1000                                         if (DBA::isResult($item_content)) {
1001                                                 $item_fields = ['icid' => $item_content['id']];
1002                                                 // Clear all fields in the item table that have a content in the item-content table
1003                                                 foreach ($item_content as $field => $content) {
1004                                                         if (in_array($field, self::MIXED_CONTENT_FIELDLIST) && !empty($item_content[$field])) {
1005                                                                 if (self::isLegacyMode()) {
1006                                                                         $item_fields[$field] = null;
1007                                                                 } else {
1008                                                                         unset($item_fields[$field]);
1009                                                                 }
1010                                                         }
1011                                                 }
1012                                                 DBA::update('item', $item_fields, ['id' => $item['id']]);
1013                                         }
1014                                 }
1015                         }
1016
1017                         if (!is_null($tags)) {
1018                                 Term::insertFromTagFieldByItemId($item['id'], $tags);
1019                                 if (!empty($item['tag'])) {
1020                                         DBA::update('item', ['tag' => ''], ['id' => $item['id']]);
1021                                 }
1022                         }
1023
1024                         if (!is_null($files)) {
1025                                 Term::insertFromFileFieldByItemId($item['id'], $files);
1026                                 if (!empty($item['file'])) {
1027                                         DBA::update('item', ['file' => ''], ['id' => $item['id']]);
1028                                 }
1029                         }
1030
1031                         ItemDeliveryData::update($item['id'], $delivery_data);
1032
1033                         self::updateThread($item['id']);
1034
1035                         // We only need to notfiy others when it is an original entry from us.
1036                         // Only call the notifier when the item has some content relevant change.
1037                         if ($item['origin'] && in_array('edited', array_keys($fields))) {
1038                                 $notify_items[] = $item['id'];
1039                         }
1040                 }
1041
1042                 DBA::close($items);
1043                 DBA::commit();
1044
1045                 foreach ($notify_items as $notify_item) {
1046                         Worker::add(PRIORITY_HIGH, "Notifier", Delivery::POST, $notify_item);
1047                 }
1048
1049                 return $rows;
1050         }
1051
1052         /**
1053          * @brief Delete an item and notify others about it - if it was ours
1054          *
1055          * @param array   $condition The condition for finding the item entries
1056          * @param integer $priority  Priority for the notification
1057          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1058          */
1059         public static function delete($condition, $priority = PRIORITY_HIGH)
1060         {
1061                 $items = self::select(['id'], $condition);
1062                 while ($item = self::fetch($items)) {
1063                         self::deleteById($item['id'], $priority);
1064                 }
1065                 DBA::close($items);
1066         }
1067
1068         /**
1069          * @brief Delete an item for an user and notify others about it - if it was ours
1070          *
1071          * @param array   $condition The condition for finding the item entries
1072          * @param integer $uid       User who wants to delete this item
1073          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1074          */
1075         public static function deleteForUser($condition, $uid)
1076         {
1077                 if ($uid == 0) {
1078                         return;
1079                 }
1080
1081                 $items = self::select(['id', 'uid'], $condition);
1082                 while ($item = self::fetch($items)) {
1083                         // "Deleting" global items just means hiding them
1084                         if ($item['uid'] == 0) {
1085                                 DBA::update('user-item', ['hidden' => true], ['iid' => $item['id'], 'uid' => $uid], true);
1086                         } elseif ($item['uid'] == $uid) {
1087                                 self::deleteById($item['id'], PRIORITY_HIGH);
1088                         } else {
1089                                 Logger::log('Wrong ownership. Not deleting item ' . $item['id']);
1090                         }
1091                 }
1092                 DBA::close($items);
1093         }
1094
1095         /**
1096          * @brief Delete an item and notify others about it - if it was ours
1097          *
1098          * @param integer $item_id  Item ID that should be delete
1099          * @param integer $priority Priority for the notification
1100          *
1101          * @return boolean success
1102          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1103          */
1104         public static function deleteById($item_id, $priority = PRIORITY_HIGH)
1105         {
1106                 // locate item to be deleted
1107                 $fields = ['id', 'uri', 'uid', 'parent', 'parent-uri', 'origin',
1108                         'deleted', 'file', 'resource-id', 'event-id', 'attach',
1109                         'verb', 'object-type', 'object', 'target', 'contact-id',
1110                         'icid', 'iaid', 'psid'];
1111                 $item = self::selectFirst($fields, ['id' => $item_id]);
1112                 if (!DBA::isResult($item)) {
1113                         Logger::log('Item with ID ' . $item_id . " hasn't been found.", Logger::DEBUG);
1114                         return false;
1115                 }
1116
1117                 if ($item['deleted']) {
1118                         Logger::log('Item with ID ' . $item_id . ' has already been deleted.', Logger::DEBUG);
1119                         return false;
1120                 }
1121
1122                 $parent = self::selectFirst(['origin'], ['id' => $item['parent']]);
1123                 if (!DBA::isResult($parent)) {
1124                         $parent = ['origin' => false];
1125                 }
1126
1127                 // clean up categories and tags so they don't end up as orphans
1128
1129                 $matches = false;
1130                 $cnt = preg_match_all('/<(.*?)>/', $item['file'], $matches, PREG_SET_ORDER);
1131
1132                 if ($cnt) {
1133                         foreach ($matches as $mtch) {
1134                                 FileTag::unsaveFile($item['uid'], $item['id'], $mtch[1],true);
1135                         }
1136                 }
1137
1138                 $matches = false;
1139
1140                 $cnt = preg_match_all('/\[(.*?)\]/', $item['file'], $matches, PREG_SET_ORDER);
1141
1142                 if ($cnt) {
1143                         foreach ($matches as $mtch) {
1144                                 FileTag::unsaveFile($item['uid'], $item['id'], $mtch[1],false);
1145                         }
1146                 }
1147
1148                 /*
1149                  * If item is a link to a photo resource, nuke all the associated photos
1150                  * (visitors will not have photo resources)
1151                  * This only applies to photos uploaded from the photos page. Photos inserted into a post do not
1152                  * generate a resource-id and therefore aren't intimately linked to the item.
1153                  */
1154                 /// @TODO: this should first check if photo is used elsewhere
1155                 if (strlen($item['resource-id'])) {
1156                         Photo::delete(['resource-id' => $item['resource-id'], 'uid' => $item['uid']]);
1157                 }
1158
1159                 // If item is a link to an event, delete the event.
1160                 if (intval($item['event-id'])) {
1161                         Event::delete($item['event-id']);
1162                 }
1163
1164                 // If item has attachments, drop them
1165                 /// @TODO: this should first check if attachment is used elsewhere
1166                 foreach (explode(",", $item['attach']) as $attach) {
1167                         preg_match("|attach/(\d+)|", $attach, $matches);
1168                         if (is_array($matches) && count($matches) > 1) {
1169                                 Attach::delete(['id' => $matches[1], 'uid' => $item['uid']]);
1170                         }
1171                 }
1172
1173                 // Delete tags that had been attached to other items
1174                 self::deleteTagsFromItem($item);
1175
1176                 // Set the item to "deleted"
1177                 $item_fields = ['deleted' => true, 'edited' => DateTimeFormat::utcNow(), 'changed' => DateTimeFormat::utcNow()];
1178                 DBA::update('item', $item_fields, ['id' => $item['id']]);
1179
1180                 Term::insertFromTagFieldByItemId($item['id'], '');
1181                 Term::insertFromFileFieldByItemId($item['id'], '');
1182                 self::deleteThread($item['id'], $item['parent-uri']);
1183
1184                 if (!self::exists(["`uri` = ? AND `uid` != 0 AND NOT `deleted`", $item['uri']])) {
1185                         self::delete(['uri' => $item['uri'], 'uid' => 0, 'deleted' => false], $priority);
1186                 }
1187
1188                 ItemDeliveryData::delete($item['id']);
1189
1190                 // We don't delete the item-activity here, since we need some of the data for ActivityPub
1191
1192                 if (!empty($item['icid']) && !self::exists(['icid' => $item['icid'], 'deleted' => false])) {
1193                         DBA::delete('item-content', ['id' => $item['icid']], ['cascade' => false]);
1194                 }
1195                 // When the permission set will be used in photo and events as well,
1196                 // this query here needs to be extended.
1197                 // @todo Currently deactivated. We need the permission set in the deletion process.
1198                 // This is a reminder to add the removal somewhere else.
1199                 //if (!empty($item['psid']) && !self::exists(['psid' => $item['psid'], 'deleted' => false])) {
1200                 //      DBA::delete('permissionset', ['id' => $item['psid']], ['cascade' => false]);
1201                 //}
1202
1203                 // If it's the parent of a comment thread, kill all the kids
1204                 if ($item['id'] == $item['parent']) {
1205                         self::delete(['parent' => $item['parent'], 'deleted' => false], $priority);
1206                 }
1207
1208                 // Is it our comment and/or our thread?
1209                 if ($item['origin'] || $parent['origin']) {
1210
1211                         // When we delete the original post we will delete all existing copies on the server as well
1212                         self::delete(['uri' => $item['uri'], 'deleted' => false], $priority);
1213
1214                         // send the notification upstream/downstream
1215                         Worker::add(['priority' => $priority, 'dont_fork' => true], "Notifier", Delivery::DELETION, intval($item['id']));
1216                 } elseif ($item['uid'] != 0) {
1217
1218                         // When we delete just our local user copy of an item, we have to set a marker to hide it
1219                         $global_item = self::selectFirst(['id'], ['uri' => $item['uri'], 'uid' => 0, 'deleted' => false]);
1220                         if (DBA::isResult($global_item)) {
1221                                 DBA::update('user-item', ['hidden' => true], ['iid' => $global_item['id'], 'uid' => $item['uid']], true);
1222                         }
1223                 }
1224
1225                 Logger::log('Item with ID ' . $item_id . " has been deleted.", Logger::DEBUG);
1226
1227                 return true;
1228         }
1229
1230         private static function deleteTagsFromItem($item)
1231         {
1232                 if (($item["verb"] != Activity::TAG) || ($item["object-type"] != Activity\ObjectType::TAGTERM)) {
1233                         return;
1234                 }
1235
1236                 $xo = XML::parseString($item["object"], false);
1237                 $xt = XML::parseString($item["target"], false);
1238
1239                 if ($xt->type != Activity\ObjectType::NOTE) {
1240                         return;
1241                 }
1242
1243                 $i = self::selectFirst(['id', 'contact-id', 'tag'], ['uri' => $xt->id, 'uid' => $item['uid']]);
1244                 if (!DBA::isResult($i)) {
1245                         return;
1246                 }
1247
1248                 // For tags, the owner cannot remove the tag on the author's copy of the post.
1249                 $owner_remove = ($item["contact-id"] == $i["contact-id"]);
1250                 $author_copy = $item["origin"];
1251
1252                 if (($owner_remove && $author_copy) || !$owner_remove) {
1253                         return;
1254                 }
1255
1256                 $tags = explode(',', $i["tag"]);
1257                 $newtags = [];
1258                 if (count($tags)) {
1259                         foreach ($tags as $tag) {
1260                                 if (trim($tag) !== trim($xo->body)) {
1261                                        $newtags[] = trim($tag);
1262                                 }
1263                         }
1264                 }
1265                 self::update(['tag' => implode(',', $newtags)], ['id' => $i["id"]]);
1266         }
1267
1268         private static function guid($item, $notify)
1269         {
1270                 if (!empty($item['guid'])) {
1271                         return Strings::escapeTags(trim($item['guid']));
1272                 }
1273
1274                 if ($notify) {
1275                         // We have to avoid duplicates. So we create the GUID in form of a hash of the plink or uri.
1276                         // We add the hash of our own host because our host is the original creator of the post.
1277                         $prefix_host = \get_app()->getHostName();
1278                 } else {
1279                         $prefix_host = '';
1280
1281                         // We are only storing the post so we create a GUID from the original hostname.
1282                         if (!empty($item['author-link'])) {
1283                                 $parsed = parse_url($item['author-link']);
1284                                 if (!empty($parsed['host'])) {
1285                                         $prefix_host = $parsed['host'];
1286                                 }
1287                         }
1288
1289                         if (empty($prefix_host) && !empty($item['plink'])) {
1290                                 $parsed = parse_url($item['plink']);
1291                                 if (!empty($parsed['host'])) {
1292                                         $prefix_host = $parsed['host'];
1293                                 }
1294                         }
1295
1296                         if (empty($prefix_host) && !empty($item['uri'])) {
1297                                 $parsed = parse_url($item['uri']);
1298                                 if (!empty($parsed['host'])) {
1299                                         $prefix_host = $parsed['host'];
1300                                 }
1301                         }
1302
1303                         // Is it in the format data@host.tld? - Used for mail contacts
1304                         if (empty($prefix_host) && !empty($item['author-link']) && strstr($item['author-link'], '@')) {
1305                                 $mailparts = explode('@', $item['author-link']);
1306                                 $prefix_host = array_pop($mailparts);
1307                         }
1308                 }
1309
1310                 if (!empty($item['plink'])) {
1311                         $guid = self::guidFromUri($item['plink'], $prefix_host);
1312                 } elseif (!empty($item['uri'])) {
1313                         $guid = self::guidFromUri($item['uri'], $prefix_host);
1314                 } else {
1315                         $guid = System::createUUID(hash('crc32', $prefix_host));
1316                 }
1317
1318                 return $guid;
1319         }
1320
1321         private static function contactId($item)
1322         {
1323                 if (!empty($item['contact-id']) && DBA::exists('contact', ['self' => true, 'id' => $item['contact-id']])) {
1324                         return $item['contact-id'];
1325                 } elseif (($item['gravity'] == GRAVITY_PARENT) && !empty($item['uid']) && !empty($item['contact-id']) && Contact::isSharing($item['contact-id'], $item['uid'])) {
1326                         return $item['contact-id'];
1327                 } elseif (!empty($item['uid']) && !Contact::isSharing($item['author-id'], $item['uid'])) {
1328                         return $item['author-id'];
1329                 } elseif (!empty($item['contact-id'])) {
1330                         return $item['contact-id'];
1331                 } else {
1332                         $contact_id = Contact::getIdForURL($item['author-link'], $item['uid']);
1333                         if (!empty($contact_id)) {
1334                                 return $contact_id;
1335                         }
1336                 }
1337                 return $item['author-id'];
1338         }
1339
1340         // This function will finally cover most of the preparation functionality in mod/item.php
1341         public static function prepare(&$item)
1342         {
1343                 /*
1344                  * @TODO: Unused code triggering inspection errors
1345                  *
1346                 $data = BBCode::getAttachmentData($item['body']);
1347                 if ((preg_match_all("/\[bookmark\=([^\]]*)\](.*?)\[\/bookmark\]/ism", $item['body'], $match, PREG_SET_ORDER) || isset($data["type"]))
1348                         && ($posttype != Item::PT_PERSONAL_NOTE)) {
1349                         $posttype = Item::PT_PAGE;
1350                         $objecttype = ACTIVITY_OBJ_BOOKMARK;
1351                 }
1352                  */
1353         }
1354
1355         /**
1356          * Write an item array into a spool file to be inserted later.
1357          * This command is called whenever there are issues storing an item.
1358          *
1359          * @param array $item The item fields that are to be inserted
1360          * @throws \Exception
1361          */
1362         private static function spool($orig_item)
1363         {
1364                 // Now we store the data in the spool directory
1365                 // We use "microtime" to keep the arrival order and "mt_rand" to avoid duplicates
1366                 $file = 'item-' . round(microtime(true) * 10000) . '-' . mt_rand() . '.msg';
1367
1368                 $spoolpath = get_spoolpath();
1369                 if ($spoolpath != "") {
1370                         $spool = $spoolpath . '/' . $file;
1371
1372                         file_put_contents($spool, json_encode($orig_item));
1373                         Logger::warning("Item wasn't stored - Item was spooled into file", ['file' => $file]);
1374                 }
1375         }
1376
1377         public static function insert($item, $force_parent = false, $notify = false, $dontcache = false)
1378         {
1379                 $orig_item = $item;
1380
1381                 $priority = PRIORITY_HIGH;
1382
1383                 // If it is a posting where users should get notifications, then define it as wall posting
1384                 if ($notify) {
1385                         $item['wall'] = 1;
1386                         $item['origin'] = 1;
1387                         $item['network'] = Protocol::DFRN;
1388                         $item['protocol'] = Conversation::PARCEL_DFRN;
1389
1390                         if (is_int($notify)) {
1391                                 $priority = $notify;
1392                         }
1393                 } else {
1394                         $item['network'] = trim(($item['network'] ?? '') ?: Protocol::PHANTOM);
1395                 }
1396
1397                 $item['guid'] = self::guid($item, $notify);
1398                 $item['uri'] = Strings::escapeTags(trim(($item['uri'] ?? '') ?: self::newURI($item['uid'], $item['guid'])));
1399
1400                 // Store URI data
1401                 $item['uri-id'] = ItemURI::insert(['uri' => $item['uri'], 'guid' => $item['guid']]);
1402
1403                 // Store conversation data
1404                 $item = Conversation::insert($item);
1405
1406                 /*
1407                  * If a Diaspora signature structure was passed in, pull it out of the
1408                  * item array and set it aside for later storage.
1409                  */
1410
1411                 $dsprsig = null;
1412                 if (isset($item['dsprsig'])) {
1413                         $encoded_signature = $item['dsprsig'];
1414                         $dsprsig = json_decode(base64_decode($item['dsprsig']));
1415                         unset($item['dsprsig']);
1416                 }
1417
1418                 $diaspora_signed_text = '';
1419                 if (isset($item['diaspora_signed_text'])) {
1420                         $diaspora_signed_text = $item['diaspora_signed_text'];
1421                         unset($item['diaspora_signed_text']);
1422                 }
1423
1424                 // Converting the plink
1425                 /// @TODO Check if this is really still needed
1426                 if ($item['network'] == Protocol::OSTATUS) {
1427                         if (isset($item['plink'])) {
1428                                 $item['plink'] = OStatus::convertHref($item['plink']);
1429                         } elseif (isset($item['uri'])) {
1430                                 $item['plink'] = OStatus::convertHref($item['uri']);
1431                         }
1432                 }
1433
1434                 if (!empty($item['thr-parent'])) {
1435                         $item['parent-uri'] = $item['thr-parent'];
1436                 }
1437
1438                 /** @var Activity $activity */
1439                 $activity = self::getClass(Activity::class);
1440
1441                 if (isset($item['gravity'])) {
1442                         $item['gravity'] = intval($item['gravity']);
1443                 } elseif ($item['parent-uri'] === $item['uri']) {
1444                         $item['gravity'] = GRAVITY_PARENT;
1445                 } elseif ($activity->match($item['verb'], Activity::POST)) {
1446                         $item['gravity'] = GRAVITY_COMMENT;
1447                 } elseif ($activity->match($item['verb'], Activity::FOLLOW)) {
1448                         $item['gravity'] = GRAVITY_ACTIVITY;
1449                 } else {
1450                         $item['gravity'] = GRAVITY_UNKNOWN;   // Should not happen
1451                         Logger::log('Unknown gravity for verb: ' . $item['verb'], Logger::DEBUG);
1452                 }
1453
1454                 $uid = intval($item['uid']);
1455
1456                 // check for create date and expire time
1457                 $expire_interval = Config::get('system', 'dbclean-expire-days', 0);
1458
1459                 $user = DBA::selectFirst('user', ['expire'], ['uid' => $uid]);
1460                 if (DBA::isResult($user) && ($user['expire'] > 0) && (($user['expire'] < $expire_interval) || ($expire_interval == 0))) {
1461                         $expire_interval = $user['expire'];
1462                 }
1463
1464                 if (($expire_interval > 0) && !empty($item['created'])) {
1465                         $expire_date = time() - ($expire_interval * 86400);
1466                         $created_date = strtotime($item['created']);
1467                         if ($created_date < $expire_date) {
1468                                 Logger::notice('Item created before expiration interval.', [
1469                                         'created' => date('c', $created_date),
1470                                         'expired' => date('c', $expire_date),
1471                                         '$item' => $item
1472                                 ]);
1473                                 return 0;
1474                         }
1475                 }
1476
1477                 /*
1478                  * Do we already have this item?
1479                  * We have to check several networks since Friendica posts could be repeated
1480                  * via OStatus (maybe Diasporsa as well)
1481                  */
1482                 if (empty($item['network']) || in_array($item['network'], Protocol::FEDERATED)) {
1483                         $condition = ["`uri` = ? AND `uid` = ? AND `network` IN (?, ?, ?, ?)",
1484                                 trim($item['uri']), $item['uid'],
1485                                 Protocol::ACTIVITYPUB, Protocol::DIASPORA, Protocol::DFRN, Protocol::OSTATUS];
1486                         $existing = self::selectFirst(['id', 'network'], $condition);
1487                         if (DBA::isResult($existing)) {
1488                                 // We only log the entries with a different user id than 0. Otherwise we would have too many false positives
1489                                 if ($uid != 0) {
1490                                         Logger::notice('Item already existed for user', [
1491                                                 'uri' => $item['uri'],
1492                                                 'uid' => $uid,
1493                                                 'network' => $item['network'],
1494                                                 'existing_id' => $existing["id"],
1495                                                 'existing_network' => $existing["network"]
1496                                         ]);
1497                                 }
1498
1499                                 return $existing["id"];
1500                         }
1501                 }
1502
1503                 $item['wall']          = intval($item['wall'] ?? 0);
1504                 $item['extid']         = trim($item['extid'] ?? '');
1505                 $item['author-name']   = trim($item['author-name'] ?? '');
1506                 $item['author-link']   = trim($item['author-link'] ?? '');
1507                 $item['author-avatar'] = trim($item['author-avatar'] ?? '');
1508                 $item['owner-name']    = trim($item['owner-name'] ?? '');
1509                 $item['owner-link']    = trim($item['owner-link'] ?? '');
1510                 $item['owner-avatar']  = trim($item['owner-avatar'] ?? '');
1511                 $item['received']      = (isset($item['received'])  ? DateTimeFormat::utc($item['received'])  : DateTimeFormat::utcNow());
1512                 $item['created']       = (isset($item['created'])   ? DateTimeFormat::utc($item['created'])   : $item['received']);
1513                 $item['edited']        = (isset($item['edited'])    ? DateTimeFormat::utc($item['edited'])    : $item['created']);
1514                 $item['changed']       = (isset($item['changed'])   ? DateTimeFormat::utc($item['changed'])   : $item['created']);
1515                 $item['commented']     = (isset($item['commented']) ? DateTimeFormat::utc($item['commented']) : $item['created']);
1516                 $item['title']         = trim($item['title'] ?? '');
1517                 $item['location']      = trim($item['location'] ?? '');
1518                 $item['coord']         = trim($item['coord'] ?? '');
1519                 $item['visible']       = (isset($item['visible']) ? intval($item['visible']) : 1);
1520                 $item['deleted']       = 0;
1521                 $item['parent-uri']    = trim(($item['parent-uri'] ?? '') ?: $item['uri']);
1522                 $item['post-type']     = ($item['post-type'] ?? '') ?: self::PT_ARTICLE;
1523                 $item['verb']          = trim($item['verb'] ?? '');
1524                 $item['object-type']   = trim($item['object-type'] ?? '');
1525                 $item['object']        = trim($item['object'] ?? '');
1526                 $item['target-type']   = trim($item['target-type'] ?? '');
1527                 $item['target']        = trim($item['target'] ?? '');
1528                 $item['plink']         = trim($item['plink'] ?? '');
1529                 $item['allow_cid']     = trim($item['allow_cid'] ?? '');
1530                 $item['allow_gid']     = trim($item['allow_gid'] ?? '');
1531                 $item['deny_cid']      = trim($item['deny_cid'] ?? '');
1532                 $item['deny_gid']      = trim($item['deny_gid'] ?? '');
1533                 $item['private']       = intval($item['private'] ?? 0);
1534                 $item['body']          = trim($item['body'] ?? '');
1535                 $item['tag']           = trim($item['tag'] ?? '');
1536                 $item['attach']        = trim($item['attach'] ?? '');
1537                 $item['app']           = trim($item['app'] ?? '');
1538                 $item['origin']        = intval($item['origin'] ?? 0);
1539                 $item['postopts']      = trim($item['postopts'] ?? '');
1540                 $item['resource-id']   = trim($item['resource-id'] ?? '');
1541                 $item['event-id']      = intval($item['event-id'] ?? 0);
1542                 $item['inform']        = trim($item['inform'] ?? '');
1543                 $item['file']          = trim($item['file'] ?? '');
1544
1545                 // When there is no content then we don't post it
1546                 if ($item['body'].$item['title'] == '') {
1547                         Logger::notice('No body, no title.');
1548                         return 0;
1549                 }
1550
1551                 self::addLanguageToItemArray($item);
1552
1553                 // Items cannot be stored before they happen ...
1554                 if ($item['created'] > DateTimeFormat::utcNow()) {
1555                         $item['created'] = DateTimeFormat::utcNow();
1556                 }
1557
1558                 // We haven't invented time travel by now.
1559                 if ($item['edited'] > DateTimeFormat::utcNow()) {
1560                         $item['edited'] = DateTimeFormat::utcNow();
1561                 }
1562
1563                 $item['plink'] = ($item['plink'] ?? '') ?: System::baseUrl() . '/display/' . urlencode($item['guid']);
1564
1565                 $default = ['url' => $item['author-link'], 'name' => $item['author-name'],
1566                         'photo' => $item['author-avatar'], 'network' => $item['network']];
1567
1568                 $item['author-id'] = ($item['author-id'] ?? 0) ?: Contact::getIdForURL($item['author-link'], 0, false, $default);
1569
1570                 if (Contact::isBlocked($item['author-id'])) {
1571                         Logger::notice('Author is blocked node-wide', ['author-link' => $item['author-link'], 'item-uri' => $item['uri']]);
1572                         return 0;
1573                 }
1574
1575                 if (!empty($item['author-link']) && Network::isUrlBlocked($item['author-link'])) {
1576                         Logger::notice('Author server is blocked', ['author-link' => $item['author-link'], 'item-uri' => $item['uri']]);
1577                         return 0;
1578                 }
1579
1580                 if (!empty($uid) && Contact::isBlockedByUser($item['author-id'], $uid)) {
1581                         Logger::notice('Author is blocked by user', ['author-link' => $item['author-link'], 'uid' => $uid, 'item-uri' => $item['uri']]);
1582                         return 0;
1583                 }
1584
1585                 $default = ['url' => $item['owner-link'], 'name' => $item['owner-name'],
1586                         'photo' => $item['owner-avatar'], 'network' => $item['network']];
1587
1588                 $item['owner-id'] = ($item['owner-id'] ?? 0) ?: Contact::getIdForURL($item['owner-link'], 0, false, $default);
1589
1590                 if (Contact::isBlocked($item['owner-id'])) {
1591                         Logger::notice('Owner is blocked node-wide', ['owner-link' => $item['owner-link'], 'item-uri' => $item['uri']]);
1592                         return 0;
1593                 }
1594
1595                 if (!empty($item['owner-link']) && Network::isUrlBlocked($item['owner-link'])) {
1596                         Logger::notice('Owner server is blocked', ['owner-link' => $item['owner-link'], 'item-uri' => $item['uri']]);
1597                         return 0;
1598                 }
1599
1600                 if (!empty($uid) && Contact::isBlockedByUser($item['owner-id'], $uid)) {
1601                         Logger::notice('Owner is blocked by user', ['owner-link' => $item['owner-link'], 'uid' => $uid, 'item-uri' => $item['uri']]);
1602                         return 0;
1603                 }
1604
1605                 // The causer is set during a thread completion, for example because of a reshare. It countains the responsible actor.
1606                 if (!empty($uid) && !empty($item['causer-id']) && Contact::isBlockedByUser($item['causer-id'], $uid)) {
1607                         Logger::notice('Causer is blocked by user', ['causer-link' => $item['causer-link'], 'uid' => $uid, 'item-uri' => $item['uri']]);
1608                         return 0;
1609                 }
1610
1611                 if (!empty($uid) && !empty($item['causer-id']) && ($item['parent-uri'] == $item['uri']) && Contact::isIgnoredByUser($item['causer-id'], $uid)) {
1612                         Logger::notice('Causer is ignored by user', ['causer-link' => $item['causer-link'], 'uid' => $uid, 'item-uri' => $item['uri']]);
1613                         return 0;
1614                 }
1615
1616                 // We don't store the causer, we only have it here for the checks above
1617                 unset($item['causer-id']);
1618                 unset($item['causer-link']);
1619
1620                 // The contact-id should be set before "self::insert" was called - but there seems to be issues sometimes
1621                 $item["contact-id"] = self::contactId($item);
1622
1623                 if ($item['network'] == Protocol::PHANTOM) {
1624                         $item['network'] = Protocol::DFRN;
1625                         Logger::notice('Missing network, setting to {network}.', [
1626                                 'uri' => $item["uri"],
1627                                 'network' => $item['network'],
1628                                 'callstack' => System::callstack()
1629                         ]);
1630                 }
1631
1632                 // Checking if there is already an item with the same guid
1633                 $condition = ['guid' => $item['guid'], 'network' => $item['network'], 'uid' => $item['uid']];
1634                 if (self::exists($condition)) {
1635                         Logger::notice('Found already existing item', [
1636                                 'guid' => $item['guid'],
1637                                 'uid' => $item['uid'],
1638                                 'network' => $item['network']
1639                         ]);
1640                         return 0;
1641                 }
1642
1643                 if ($item['verb'] == Activity::FOLLOW) {
1644                         if (!$item['origin'] && ($item['author-id'] == Contact::getPublicIdByUserId($uid))) {
1645                                 // Our own follow request can be relayed to us. We don't store it to avoid notification chaos.
1646                                 Logger::log("Follow: Don't store not origin follow request from us for " . $item['parent-uri'], Logger::DEBUG);
1647                                 return 0;
1648                         }
1649
1650                         $condition = ['verb' => Activity::FOLLOW, 'uid' => $item['uid'],
1651                                 'parent-uri' => $item['parent-uri'], 'author-id' => $item['author-id']];
1652                         if (self::exists($condition)) {
1653                                 // It happens that we receive multiple follow requests by the same author - we only store one.
1654                                 Logger::log('Follow: Found existing follow request from author ' . $item['author-id'] . ' for ' . $item['parent-uri'], Logger::DEBUG);
1655                                 return 0;
1656                         }
1657                 }
1658
1659                 // Check for hashtags in the body and repair or add hashtag links
1660                 self::setHashtags($item);
1661
1662                 $item['thr-parent'] = $item['parent-uri'];
1663
1664                 $notify_type = Delivery::POST;
1665                 $allow_cid = '';
1666                 $allow_gid = '';
1667                 $deny_cid  = '';
1668                 $deny_gid  = '';
1669
1670                 if ($item['parent-uri'] === $item['uri']) {
1671                         $parent_id = 0;
1672                         $parent_deleted = 0;
1673                         $allow_cid = $item['allow_cid'];
1674                         $allow_gid = $item['allow_gid'];
1675                         $deny_cid  = $item['deny_cid'];
1676                         $deny_gid  = $item['deny_gid'];
1677                 } else {
1678                         // find the parent and snarf the item id and ACLs
1679                         // and anything else we need to inherit
1680
1681                         $fields = ['uri', 'parent-uri', 'id', 'deleted',
1682                                 'allow_cid', 'allow_gid', 'deny_cid', 'deny_gid',
1683                                 'wall', 'private', 'forum_mode', 'origin'];
1684                         $condition = ['uri' => $item['parent-uri'], 'uid' => $item['uid']];
1685                         $params = ['order' => ['id' => false]];
1686                         $parent = self::selectFirst($fields, $condition, $params);
1687
1688                         if (DBA::isResult($parent)) {
1689                                 // is the new message multi-level threaded?
1690                                 // even though we don't support it now, preserve the info
1691                                 // and re-attach to the conversation parent.
1692
1693                                 if ($parent['uri'] != $parent['parent-uri']) {
1694                                         $item['parent-uri'] = $parent['parent-uri'];
1695
1696                                         $condition = ['uri' => $item['parent-uri'],
1697                                                 'parent-uri' => $item['parent-uri'],
1698                                                 'uid' => $item['uid']];
1699                                         $params = ['order' => ['id' => false]];
1700                                         $toplevel_parent = self::selectFirst($fields, $condition, $params);
1701
1702                                         if (DBA::isResult($toplevel_parent)) {
1703                                                 $parent = $toplevel_parent;
1704                                         }
1705                                 }
1706
1707                                 $parent_id      = $parent['id'];
1708                                 $parent_deleted = $parent['deleted'];
1709                                 $allow_cid      = $parent['allow_cid'];
1710                                 $allow_gid      = $parent['allow_gid'];
1711                                 $deny_cid       = $parent['deny_cid'];
1712                                 $deny_gid       = $parent['deny_gid'];
1713                                 $item['wall']   = $parent['wall'];
1714
1715                                 /*
1716                                  * If the parent is private, force privacy for the entire conversation
1717                                  * This differs from the above settings as it subtly allows comments from
1718                                  * email correspondents to be private even if the overall thread is not.
1719                                  */
1720                                 if ($parent['private']) {
1721                                         $item['private'] = $parent['private'];
1722                                 }
1723
1724                                 /*
1725                                  * Edge case. We host a public forum that was originally posted to privately.
1726                                  * The original author commented, but as this is a comment, the permissions
1727                                  * weren't fixed up so it will still show the comment as private unless we fix it here.
1728                                  */
1729                                 if ((intval($parent['forum_mode']) == 1) && $parent['private']) {
1730                                         $item['private'] = 0;
1731                                 }
1732
1733                                 // If its a post that originated here then tag the thread as "mention"
1734                                 if ($item['origin'] && $item['uid']) {
1735                                         DBA::update('thread', ['mention' => true], ['iid' => $parent_id]);
1736                                         Logger::log('tagged thread ' . $parent_id . ' as mention for user ' . $item['uid'], Logger::DEBUG);
1737                                 }
1738                         } else {
1739                                 /*
1740                                  * Allow one to see reply tweets from status.net even when
1741                                  * we don't have or can't see the original post.
1742                                  */
1743                                 if ($force_parent) {
1744                                         Logger::log('$force_parent=true, reply converted to top-level post.');
1745                                         $parent_id = 0;
1746                                         $item['parent-uri'] = $item['uri'];
1747                                         $item['gravity'] = GRAVITY_PARENT;
1748                                 } else {
1749                                         Logger::log('item parent '.$item['parent-uri'].' for '.$item['uid'].' was not found - ignoring item');
1750                                         return 0;
1751                                 }
1752
1753                                 $parent_deleted = 0;
1754                         }
1755                 }
1756
1757                 if (stristr($item['verb'], Activity::POKE)) {
1758                         $notify_type = Delivery::POKE;
1759                 }
1760
1761                 $item['parent-uri-id'] = ItemURI::getIdByURI($item['parent-uri']);
1762                 $item['thr-parent-id'] = ItemURI::getIdByURI($item['thr-parent']);
1763
1764                 $condition = ["`uri` = ? AND `network` IN (?, ?) AND `uid` = ?",
1765                         $item['uri'], $item['network'], Protocol::DFRN, $item['uid']];
1766                 if (self::exists($condition)) {
1767                         Logger::log('duplicated item with the same uri found. '.print_r($item,true));
1768                         return 0;
1769                 }
1770
1771                 // On Friendica and Diaspora the GUID is unique
1772                 if (in_array($item['network'], [Protocol::DFRN, Protocol::DIASPORA])) {
1773                         $condition = ['guid' => $item['guid'], 'uid' => $item['uid']];
1774                         if (self::exists($condition)) {
1775                                 Logger::log('duplicated item with the same guid found. '.print_r($item,true));
1776                                 return 0;
1777                         }
1778                 } elseif ($item['network'] == Protocol::OSTATUS) {
1779                         // Check for an existing post with the same content. There seems to be a problem with OStatus.
1780                         $condition = ["`body` = ? AND `network` = ? AND `created` = ? AND `contact-id` = ? AND `uid` = ?",
1781                                         $item['body'], $item['network'], $item['created'], $item['contact-id'], $item['uid']];
1782                         if (self::exists($condition)) {
1783                                 Logger::log('duplicated item with the same body found. '.print_r($item,true));
1784                                 return 0;
1785                         }
1786                 }
1787
1788                 // Is this item available in the global items (with uid=0)?
1789                 if ($item["uid"] == 0) {
1790                         $item["global"] = true;
1791
1792                         // Set the global flag on all items if this was a global item entry
1793                         DBA::update('item', ['global' => true], ['uri' => $item["uri"]]);
1794                 } else {
1795                         $item["global"] = self::exists(['uid' => 0, 'uri' => $item["uri"]]);
1796                 }
1797
1798                 // ACL settings
1799                 if (strlen($allow_cid) || strlen($allow_gid) || strlen($deny_cid) || strlen($deny_gid)) {
1800                         $private = 1;
1801                 } else {
1802                         $private = $item['private'];
1803                 }
1804
1805                 $item["allow_cid"] = $allow_cid;
1806                 $item["allow_gid"] = $allow_gid;
1807                 $item["deny_cid"] = $deny_cid;
1808                 $item["deny_gid"] = $deny_gid;
1809                 $item["private"] = $private;
1810                 $item["deleted"] = $parent_deleted;
1811
1812                 // Fill the cache field
1813                 self::putInCache($item);
1814
1815                 if ($notify) {
1816                         $item['edit'] = false;
1817                         $item['parent'] = $parent_id;
1818                         Hook::callAll('post_local', $item);
1819                         unset($item['edit']);
1820                         unset($item['parent']);
1821                 } else {
1822                         Hook::callAll('post_remote', $item);
1823                 }
1824
1825                 // This array field is used to trigger some automatic reactions
1826                 // It is mainly used in the "post_local" hook.
1827                 unset($item['api_source']);
1828
1829                 if (!empty($item['cancel'])) {
1830                         Logger::log('post cancelled by addon.');
1831                         return 0;
1832                 }
1833
1834                 /*
1835                  * Check for already added items.
1836                  * There is a timing issue here that sometimes creates double postings.
1837                  * An unique index would help - but the limitations of MySQL (maximum size of index values) prevent this.
1838                  */
1839                 if ($item["uid"] == 0) {
1840                         if (self::exists(['uri' => trim($item['uri']), 'uid' => 0])) {
1841                                 Logger::log('Global item already stored. URI: '.$item['uri'].' on network '.$item['network'], Logger::DEBUG);
1842                                 return 0;
1843                         }
1844                 }
1845
1846                 Logger::log('' . print_r($item,true), Logger::DATA);
1847
1848                 if (array_key_exists('tag', $item)) {
1849                         $tags = $item['tag'];
1850                         unset($item['tag']);
1851                 } else {
1852                         $tags = '';
1853                 }
1854
1855                 if (array_key_exists('file', $item)) {
1856                         $files = $item['file'];
1857                         unset($item['file']);
1858                 } else {
1859                         $files = '';
1860                 }
1861
1862                 // Creates or assigns the permission set
1863                 $item['psid'] = PermissionSet::fetchIDForPost($item);
1864
1865                 // We are doing this outside of the transaction to avoid timing problems
1866                 if (!self::insertActivity($item)) {
1867                         self::insertContent($item);
1868                 }
1869
1870                 $delivery_data = ItemDeliveryData::extractFields($item);
1871
1872                 unset($item['postopts']);
1873                 unset($item['inform']);
1874
1875                 // These fields aren't stored anymore in the item table, they are fetched upon request
1876                 unset($item['author-link']);
1877                 unset($item['author-name']);
1878                 unset($item['author-avatar']);
1879                 unset($item['author-network']);
1880
1881                 unset($item['owner-link']);
1882                 unset($item['owner-name']);
1883                 unset($item['owner-avatar']);
1884
1885                 $like_no_comment = Config::get('system', 'like_no_comment');
1886
1887                 DBA::transaction();
1888                 $ret = DBA::insert('item', $item);
1889
1890                 // When the item was successfully stored we fetch the ID of the item.
1891                 if (DBA::isResult($ret)) {
1892                         $current_post = DBA::lastInsertId();
1893                 } else {
1894                         // This can happen - for example - if there are locking timeouts.
1895                         DBA::rollback();
1896
1897                         // Store the data into a spool file so that we can try again later.
1898                         self::spool($orig_item);
1899                         return 0;
1900                 }
1901
1902                 if ($current_post == 0) {
1903                         // This is one of these error messages that never should occur.
1904                         Logger::log("couldn't find created item - we better quit now.");
1905                         DBA::rollback();
1906                         return 0;
1907                 }
1908
1909                 // How much entries have we created?
1910                 // We wouldn't need this query when we could use an unique index - but MySQL has length problems with them.
1911                 $entries = DBA::count('item', ['uri' => $item['uri'], 'uid' => $item['uid'], 'network' => $item['network']]);
1912
1913                 if ($entries > 1) {
1914                         // There are duplicates. We delete our just created entry.
1915                         Logger::log('Duplicated post occurred. uri = ' . $item['uri'] . ' uid = ' . $item['uid']);
1916
1917                         // Yes, we could do a rollback here - but we are having many users with MyISAM.
1918                         DBA::delete('item', ['id' => $current_post]);
1919                         DBA::commit();
1920                         return 0;
1921                 } elseif ($entries == 0) {
1922                         // This really should never happen since we quit earlier if there were problems.
1923                         Logger::log("Something is terribly wrong. We haven't found our created entry.");
1924                         DBA::rollback();
1925                         return 0;
1926                 }
1927
1928                 Logger::log('created item '.$current_post);
1929
1930                 if (!$parent_id || ($item['parent-uri'] === $item['uri'])) {
1931                         $parent_id = $current_post;
1932                 }
1933
1934                 // Set parent id
1935                 DBA::update('item', ['parent' => $parent_id], ['id' => $current_post]);
1936
1937                 $item['id'] = $current_post;
1938                 $item['parent'] = $parent_id;
1939
1940                 // update the commented timestamp on the parent
1941                 // Only update "commented" if it is really a comment
1942                 if (($item['gravity'] != GRAVITY_ACTIVITY) || !$like_no_comment) {
1943                         DBA::update('item', ['commented' => DateTimeFormat::utcNow(), 'changed' => DateTimeFormat::utcNow()], ['id' => $parent_id]);
1944                 } else {
1945                         DBA::update('item', ['changed' => DateTimeFormat::utcNow()], ['id' => $parent_id]);
1946                 }
1947
1948                 if ($dsprsig) {
1949                         /*
1950                          * Friendica servers lower than 3.4.3-2 had double encoded the signature ...
1951                          * We can check for this condition when we decode and encode the stuff again.
1952                          */
1953                         if (base64_encode(base64_decode(base64_decode($dsprsig->signature))) == base64_decode($dsprsig->signature)) {
1954                                 $dsprsig->signature = base64_decode($dsprsig->signature);
1955                                 Logger::log("Repaired double encoded signature from handle ".$dsprsig->signer, Logger::DEBUG);
1956                         }
1957
1958                         if (!empty($dsprsig->signed_text) && empty($dsprsig->signature) && empty($dsprsig->signer)) {
1959                                 DBA::insert('diaspora-interaction', ['uri-id' => $item['uri-id'], 'interaction' => $dsprsig->signed_text], true);
1960                         } else {
1961                                 // The other fields are used by very old Friendica servers, so we currently store them differently
1962                                 DBA::insert('sign', ['iid' => $current_post, 'signed_text' => $dsprsig->signed_text,
1963                                         'signature' => $dsprsig->signature, 'signer' => $dsprsig->signer]);
1964                         }
1965                 }
1966
1967                 if (!empty($diaspora_signed_text)) {
1968                         DBA::insert('diaspora-interaction', ['uri-id' => $item['uri-id'], 'interaction' => $diaspora_signed_text], true);
1969                 }
1970
1971                 if ($item['parent-uri'] === $item['uri']) {
1972                         self::addThread($current_post);
1973                 } else {
1974                         self::updateThread($parent_id);
1975                 }
1976
1977                 if (!empty($item['origin']) || !empty($item['wall']) || !empty($delivery_data['postopts']) || !empty($delivery_data['inform'])) {
1978                         ItemDeliveryData::insert($current_post, $delivery_data);
1979                 }
1980
1981                 DBA::commit();
1982
1983                 /*
1984                  * Due to deadlock issues with the "term" table we are doing these steps after the commit.
1985                  * This is not perfect - but a workable solution until we found the reason for the problem.
1986                  */
1987                 if (!empty($tags)) {
1988                         Term::insertFromTagFieldByItemId($current_post, $tags);
1989                 }
1990
1991                 if (!empty($files)) {
1992                         Term::insertFromFileFieldByItemId($current_post, $files);
1993                 }
1994
1995                 // In that function we check if this is a forum post. Additionally we delete the item under certain circumstances
1996                 if (self::tagDeliver($item['uid'], $current_post)) {
1997                         // Get the user information for the logging
1998                         $user = User::getById($uid);
1999
2000                         Logger::notice('Item had been deleted', ['id' => $current_post, 'user' => $uid, 'account-type' => $user['account-type']]);
2001                         return 0;
2002                 }
2003
2004                 if (!$dontcache) {
2005                         $posted_item = self::selectFirst(self::ITEM_FIELDLIST, ['id' => $current_post]);
2006                         if (DBA::isResult($posted_item)) {
2007                                 if ($notify) {
2008                                         Hook::callAll('post_local_end', $posted_item);
2009                                 } else {
2010                                         Hook::callAll('post_remote_end', $posted_item);
2011                                 }
2012                         } else {
2013                                 Logger::log('new item not found in DB, id ' . $current_post);
2014                         }
2015                 }
2016
2017                 if ($item['parent-uri'] === $item['uri']) {
2018                         self::addShadow($current_post);
2019                 } else {
2020                         self::addShadowPost($current_post);
2021                 }
2022
2023                 self::updateContact($item);
2024
2025                 check_user_notification($current_post);
2026
2027                 if ($notify || ($item['visible'] && ((!empty($parent) && $parent['origin']) || $item['origin']))) {
2028                         Worker::add(['priority' => $priority, 'dont_fork' => true], 'Notifier', $notify_type, $current_post);
2029                 }
2030
2031                 return $current_post;
2032         }
2033
2034         /**
2035          * @brief Insert a new item content entry
2036          *
2037          * @param array $item The item fields that are to be inserted
2038          * @return bool
2039          * @throws \Exception
2040          */
2041         private static function insertActivity(&$item)
2042         {
2043                 $activity_index = self::activityToIndex($item['verb']);
2044
2045                 if ($activity_index < 0) {
2046                         return false;
2047                 }
2048
2049                 $fields = ['activity' => $activity_index, 'uri-hash' => (string)$item['uri-id'], 'uri-id' => $item['uri-id']];
2050
2051                 // We just remove everything that is content
2052                 foreach (array_merge(self::CONTENT_FIELDLIST, self::MIXED_CONTENT_FIELDLIST) as $field) {
2053                         unset($item[$field]);
2054                 }
2055
2056                 // To avoid timing problems, we are using locks.
2057                 $locked = Lock::acquire('item_insert_activity');
2058                 if (!$locked) {
2059                         Logger::log("Couldn't acquire lock for URI " . $item['uri'] . " - proceeding anyway.");
2060                 }
2061
2062                 // Do we already have this content?
2063                 $item_activity = DBA::selectFirst('item-activity', ['id'], ['uri-id' => $item['uri-id']]);
2064                 if (DBA::isResult($item_activity)) {
2065                         $item['iaid'] = $item_activity['id'];
2066                         Logger::log('Fetched activity for URI ' . $item['uri'] . ' (' . $item['iaid'] . ')');
2067                 } elseif (DBA::insert('item-activity', $fields)) {
2068                         $item['iaid'] = DBA::lastInsertId();
2069                         Logger::log('Inserted activity for URI ' . $item['uri'] . ' (' . $item['iaid'] . ')');
2070                 } else {
2071                         // This shouldn't happen.
2072                         Logger::log('Could not insert activity for URI ' . $item['uri'] . ' - should not happen');
2073                         Lock::release('item_insert_activity');
2074                         return false;
2075                 }
2076                 if ($locked) {
2077                         Lock::release('item_insert_activity');
2078                 }
2079                 return true;
2080         }
2081
2082         /**
2083          * @brief Insert a new item content entry
2084          *
2085          * @param array $item The item fields that are to be inserted
2086          * @throws \Exception
2087          */
2088         private static function insertContent(&$item)
2089         {
2090                 $fields = ['uri-plink-hash' => (string)$item['uri-id'], 'uri-id' => $item['uri-id']];
2091
2092                 foreach (array_merge(self::CONTENT_FIELDLIST, self::MIXED_CONTENT_FIELDLIST) as $field) {
2093                         if (isset($item[$field])) {
2094                                 $fields[$field] = $item[$field];
2095                                 unset($item[$field]);
2096                         }
2097                 }
2098
2099                 // To avoid timing problems, we are using locks.
2100                 $locked = Lock::acquire('item_insert_content');
2101                 if (!$locked) {
2102                         Logger::log("Couldn't acquire lock for URI " . $item['uri'] . " - proceeding anyway.");
2103                 }
2104
2105                 // Do we already have this content?
2106                 $item_content = DBA::selectFirst('item-content', ['id'], ['uri-id' => $item['uri-id']]);
2107                 if (DBA::isResult($item_content)) {
2108                         $item['icid'] = $item_content['id'];
2109                         Logger::log('Fetched content for URI ' . $item['uri'] . ' (' . $item['icid'] . ')');
2110                 } elseif (DBA::insert('item-content', $fields)) {
2111                         $item['icid'] = DBA::lastInsertId();
2112                         Logger::log('Inserted content for URI ' . $item['uri'] . ' (' . $item['icid'] . ')');
2113                 } else {
2114                         // This shouldn't happen.
2115                         Logger::log('Could not insert content for URI ' . $item['uri'] . ' - should not happen');
2116                 }
2117                 if ($locked) {
2118                         Lock::release('item_insert_content');
2119                 }
2120         }
2121
2122         /**
2123          * @brief Update existing item content entries
2124          *
2125          * @param array $item      The item fields that are to be changed
2126          * @param array $condition The condition for finding the item content entries
2127          * @return bool
2128          * @throws \Exception
2129          */
2130         private static function updateActivity($item, $condition)
2131         {
2132                 if (empty($item['verb'])) {
2133                         return false;
2134                 }
2135                 $activity_index = self::activityToIndex($item['verb']);
2136
2137                 if ($activity_index < 0) {
2138                         return false;
2139                 }
2140
2141                 $fields = ['activity' => $activity_index];
2142
2143                 Logger::log('Update activity for ' . json_encode($condition));
2144
2145                 DBA::update('item-activity', $fields, $condition, true);
2146
2147                 return true;
2148         }
2149
2150         /**
2151          * @brief Update existing item content entries
2152          *
2153          * @param array $item      The item fields that are to be changed
2154          * @param array $condition The condition for finding the item content entries
2155          * @throws \Exception
2156          */
2157         private static function updateContent($item, $condition)
2158         {
2159                 // We have to select only the fields from the "item-content" table
2160                 $fields = [];
2161                 foreach (array_merge(self::CONTENT_FIELDLIST, self::MIXED_CONTENT_FIELDLIST) as $field) {
2162                         if (isset($item[$field])) {
2163                                 $fields[$field] = $item[$field];
2164                         }
2165                 }
2166
2167                 if (empty($fields)) {
2168                         // when there are no fields at all, just use the condition
2169                         // This is to ensure that we always store content.
2170                         $fields = $condition;
2171                 }
2172
2173                 Logger::log('Update content for ' . json_encode($condition));
2174
2175                 DBA::update('item-content', $fields, $condition, true);
2176         }
2177
2178         /**
2179          * @brief Distributes public items to the receivers
2180          *
2181          * @param integer $itemid      Item ID that should be added
2182          * @param string  $signed_text Original text (for Diaspora signatures), JSON encoded.
2183          * @throws \Exception
2184          */
2185         public static function distribute($itemid, $signed_text = '')
2186         {
2187                 $condition = ["`id` IN (SELECT `parent` FROM `item` WHERE `id` = ?)", $itemid];
2188                 $parent = self::selectFirst(['owner-id'], $condition);
2189                 if (!DBA::isResult($parent)) {
2190                         return;
2191                 }
2192
2193                 // Only distribute public items from native networks
2194                 $condition = ['id' => $itemid, 'uid' => 0,
2195                         'network' => array_merge(Protocol::FEDERATED ,['']),
2196                         'visible' => true, 'deleted' => false, 'moderated' => false, 'private' => false];
2197                 $item = self::selectFirst(self::ITEM_FIELDLIST, $condition);
2198                 if (!DBA::isResult($item)) {
2199                         return;
2200                 }
2201
2202                 $origin = $item['origin'];
2203
2204                 unset($item['id']);
2205                 unset($item['parent']);
2206                 unset($item['mention']);
2207                 unset($item['wall']);
2208                 unset($item['origin']);
2209                 unset($item['starred']);
2210
2211                 $users = [];
2212
2213                 /// @todo add a field "pcid" in the contact table that referrs to the public contact id.
2214                 $owner = DBA::selectFirst('contact', ['url', 'nurl', 'alias'], ['id' => $parent['owner-id']]);
2215                 if (!DBA::isResult($owner)) {
2216                         return;
2217                 }
2218
2219                 $condition = ['nurl' => $owner['nurl'], 'rel' => [Contact::SHARING, Contact::FRIEND]];
2220                 $contacts = DBA::select('contact', ['uid'], $condition);
2221                 while ($contact = DBA::fetch($contacts)) {
2222                         if ($contact['uid'] == 0) {
2223                                 continue;
2224                         }
2225
2226                         $users[$contact['uid']] = $contact['uid'];
2227                 }
2228                 DBA::close($contacts);
2229
2230                 $condition = ['alias' => $owner['url'], 'rel' => [Contact::SHARING, Contact::FRIEND]];
2231                 $contacts = DBA::select('contact', ['uid'], $condition);
2232                 while ($contact = DBA::fetch($contacts)) {
2233                         if ($contact['uid'] == 0) {
2234                                 continue;
2235                         }
2236
2237                         $users[$contact['uid']] = $contact['uid'];
2238                 }
2239                 DBA::close($contacts);
2240
2241                 if (!empty($owner['alias'])) {
2242                         $condition = ['url' => $owner['alias'], 'rel' => [Contact::SHARING, Contact::FRIEND]];
2243                         $contacts = DBA::select('contact', ['uid'], $condition);
2244                         while ($contact = DBA::fetch($contacts)) {
2245                                 if ($contact['uid'] == 0) {
2246                                         continue;
2247                                 }
2248
2249                                 $users[$contact['uid']] = $contact['uid'];
2250                         }
2251                         DBA::close($contacts);
2252                 }
2253
2254                 $origin_uid = 0;
2255
2256                 if ($item['uri'] != $item['parent-uri']) {
2257                         $parents = self::select(['uid', 'origin'], ["`uri` = ? AND `uid` != 0", $item['parent-uri']]);
2258                         while ($parent = self::fetch($parents)) {
2259                                 $users[$parent['uid']] = $parent['uid'];
2260                                 if ($parent['origin'] && !$origin) {
2261                                         $origin_uid = $parent['uid'];
2262                                 }
2263                         }
2264                 }
2265
2266                 foreach ($users as $uid) {
2267                         if ($origin_uid == $uid) {
2268                                 $item['diaspora_signed_text'] = $signed_text;
2269                         }
2270                         self::storeForUser($itemid, $item, $uid);
2271                 }
2272         }
2273
2274         /**
2275          * @brief Store public items for the receivers
2276          *
2277          * @param integer $itemid Item ID that should be added
2278          * @param array   $item   The item entry that will be stored
2279          * @param integer $uid    The user that will receive the item entry
2280          * @throws \Exception
2281          */
2282         private static function storeForUser($itemid, $item, $uid)
2283         {
2284                 $item['uid'] = $uid;
2285                 $item['origin'] = 0;
2286                 $item['wall'] = 0;
2287                 if ($item['uri'] == $item['parent-uri']) {
2288                         $item['contact-id'] = Contact::getIdForURL($item['owner-link'], $uid);
2289                 } else {
2290                         $item['contact-id'] = Contact::getIdForURL($item['author-link'], $uid);
2291                 }
2292
2293                 if (empty($item['contact-id'])) {
2294                         $self = DBA::selectFirst('contact', ['id'], ['self' => true, 'uid' => $uid]);
2295                         if (!DBA::isResult($self)) {
2296                                 return;
2297                         }
2298                         $item['contact-id'] = $self['id'];
2299                 }
2300
2301                 /// @todo Handling of "event-id"
2302
2303                 $notify = false;
2304                 if ($item['uri'] == $item['parent-uri']) {
2305                         $contact = DBA::selectFirst('contact', [], ['id' => $item['contact-id'], 'self' => false]);
2306                         if (DBA::isResult($contact)) {
2307                                 $notify = self::isRemoteSelf($contact, $item);
2308                         }
2309                 }
2310
2311                 $distributed = self::insert($item, false, $notify, true);
2312
2313                 if (!$distributed) {
2314                         Logger::log("Distributed public item " . $itemid . " for user " . $uid . " wasn't stored", Logger::DEBUG);
2315                 } else {
2316                         Logger::log("Distributed public item " . $itemid . " for user " . $uid . " with id " . $distributed, Logger::DEBUG);
2317                 }
2318         }
2319
2320         /**
2321          * @brief Add a shadow entry for a given item id that is a thread starter
2322          *
2323          * We store every public item entry additionally with the user id "0".
2324          * This is used for the community page and for the search.
2325          * It is planned that in the future we will store public item entries only once.
2326          *
2327          * @param integer $itemid Item ID that should be added
2328          * @throws \Exception
2329          */
2330         public static function addShadow($itemid)
2331         {
2332                 $fields = ['uid', 'private', 'moderated', 'visible', 'deleted', 'network', 'uri'];
2333                 $condition = ['id' => $itemid, 'parent' => [0, $itemid]];
2334                 $item = self::selectFirst($fields, $condition);
2335
2336                 if (!DBA::isResult($item)) {
2337                         return;
2338                 }
2339
2340                 // is it already a copy?
2341                 if (($itemid == 0) || ($item['uid'] == 0)) {
2342                         return;
2343                 }
2344
2345                 // Is it a visible public post?
2346                 if (!$item["visible"] || $item["deleted"] || $item["moderated"] || $item["private"]) {
2347                         return;
2348                 }
2349
2350                 // is it an entry from a connector? Only add an entry for natively connected networks
2351                 if (!in_array($item["network"], array_merge(Protocol::FEDERATED ,['']))) {
2352                         return;
2353                 }
2354
2355                 if (self::exists(['uri' => $item['uri'], 'uid' => 0])) {
2356                         return;
2357                 }
2358
2359                 $item = self::selectFirst(self::ITEM_FIELDLIST, ['id' => $itemid]);
2360
2361                 if (DBA::isResult($item)) {
2362                         // Preparing public shadow (removing user specific data)
2363                         $item['uid'] = 0;
2364                         unset($item['id']);
2365                         unset($item['parent']);
2366                         unset($item['wall']);
2367                         unset($item['mention']);
2368                         unset($item['origin']);
2369                         unset($item['starred']);
2370                         unset($item['postopts']);
2371                         unset($item['inform']);
2372                         if ($item['uri'] == $item['parent-uri']) {
2373                                 $item['contact-id'] = $item['owner-id'];
2374                         } else {
2375                                 $item['contact-id'] = $item['author-id'];
2376                         }
2377
2378                         $public_shadow = self::insert($item, false, false, true);
2379
2380                         Logger::log("Stored public shadow for thread ".$itemid." under id ".$public_shadow, Logger::DEBUG);
2381                 }
2382         }
2383
2384         /**
2385          * @brief Add a shadow entry for a given item id that is a comment
2386          *
2387          * This function does the same like the function above - but for comments
2388          *
2389          * @param integer $itemid Item ID that should be added
2390          * @throws \Exception
2391          */
2392         public static function addShadowPost($itemid)
2393         {
2394                 $item = self::selectFirst(self::ITEM_FIELDLIST, ['id' => $itemid]);
2395                 if (!DBA::isResult($item)) {
2396                         return;
2397                 }
2398
2399                 // Is it a toplevel post?
2400                 if ($item['id'] == $item['parent']) {
2401                         self::addShadow($itemid);
2402                         return;
2403                 }
2404
2405                 // Is this a shadow entry?
2406                 if ($item['uid'] == 0) {
2407                         return;
2408                 }
2409
2410                 // Is there a shadow parent?
2411                 if (!self::exists(['uri' => $item['parent-uri'], 'uid' => 0])) {
2412                         return;
2413                 }
2414
2415                 // Is there already a shadow entry?
2416                 if (self::exists(['uri' => $item['uri'], 'uid' => 0])) {
2417                         return;
2418                 }
2419
2420                 // Save "origin" and "parent" state
2421                 $origin = $item['origin'];
2422                 $parent = $item['parent'];
2423
2424                 // Preparing public shadow (removing user specific data)
2425                 $item['uid'] = 0;
2426                 unset($item['id']);
2427                 unset($item['parent']);
2428                 unset($item['wall']);
2429                 unset($item['mention']);
2430                 unset($item['origin']);
2431                 unset($item['starred']);
2432                 unset($item['postopts']);
2433                 unset($item['inform']);
2434                 $item['contact-id'] = Contact::getIdForURL($item['author-link']);
2435
2436                 $public_shadow = self::insert($item, false, false, true);
2437
2438                 Logger::log("Stored public shadow for comment ".$item['uri']." under id ".$public_shadow, Logger::DEBUG);
2439
2440                 // If this was a comment to a Diaspora post we don't get our comment back.
2441                 // This means that we have to distribute the comment by ourselves.
2442                 if ($origin && self::exists(['id' => $parent, 'network' => Protocol::DIASPORA])) {
2443                         self::distribute($public_shadow);
2444                 }
2445         }
2446
2447         /**
2448          * Adds a language specification in a "language" element of given $arr.
2449          * Expects "body" element to exist in $arr.
2450          *
2451          * @param $item
2452          * @throws \Text_LanguageDetect_Exception
2453          */
2454         private static function addLanguageToItemArray(&$item)
2455         {
2456                 $naked_body = BBCode::toPlaintext($item['body'], false);
2457
2458                 $ld = new Text_LanguageDetect();
2459                 $ld->setNameMode(2);
2460                 $languages = $ld->detect($naked_body, 3);
2461
2462                 if (is_array($languages)) {
2463                         $item['language'] = json_encode($languages);
2464                 }
2465         }
2466
2467         /**
2468          * @brief Creates an unique guid out of a given uri
2469          *
2470          * @param string $uri uri of an item entry
2471          * @param string $host hostname for the GUID prefix
2472          * @return string unique guid
2473          */
2474         public static function guidFromUri($uri, $host)
2475         {
2476                 // Our regular guid routine is using this kind of prefix as well
2477                 // We have to avoid that different routines could accidentally create the same value
2478                 $parsed = parse_url($uri);
2479
2480                 // We use a hash of the hostname as prefix for the guid
2481                 $guid_prefix = hash("crc32", $host);
2482
2483                 // Remove the scheme to make sure that "https" and "http" doesn't make a difference
2484                 unset($parsed["scheme"]);
2485
2486                 // Glue it together to be able to make a hash from it
2487                 $host_id = implode("/", $parsed);
2488
2489                 // We could use any hash algorithm since it isn't a security issue
2490                 $host_hash = hash("ripemd128", $host_id);
2491
2492                 return $guid_prefix.$host_hash;
2493         }
2494
2495         /**
2496          * generate an unique URI
2497          *
2498          * @param integer $uid  User id
2499          * @param string  $guid An existing GUID (Otherwise it will be generated)
2500          *
2501          * @return string
2502          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
2503          */
2504         public static function newURI($uid, $guid = "")
2505         {
2506                 if ($guid == "") {
2507                         $guid = System::createUUID();
2508                 }
2509
2510                 return self::getApp()->getBaseURL() . '/objects/' . $guid;
2511         }
2512
2513         /**
2514          * @brief Set "success_update" and "last-item" to the date of the last time we heard from this contact
2515          *
2516          * This can be used to filter for inactive contacts.
2517          * Only do this for public postings to avoid privacy problems, since poco data is public.
2518          * Don't set this value if it isn't from the owner (could be an author that we don't know)
2519          *
2520          * @param array $arr Contains the just posted item record
2521          * @throws \Exception
2522          */
2523         private static function updateContact($arr)
2524         {
2525                 // Unarchive the author
2526                 $contact = DBA::selectFirst('contact', [], ['id' => $arr["author-id"]]);
2527                 if (DBA::isResult($contact)) {
2528                         Contact::unmarkForArchival($contact);
2529                 }
2530
2531                 // Unarchive the contact if it's not our own contact
2532                 $contact = DBA::selectFirst('contact', [], ['id' => $arr["contact-id"], 'self' => false]);
2533                 if (DBA::isResult($contact)) {
2534                         Contact::unmarkForArchival($contact);
2535                 }
2536
2537                 $update = (!$arr['private'] && ((($arr['author-link'] ?? '') === ($arr['owner-link'] ?? '')) || ($arr["parent-uri"] === $arr["uri"])));
2538
2539                 // Is it a forum? Then we don't care about the rules from above
2540                 if (!$update && in_array($arr["network"], [Protocol::ACTIVITYPUB, Protocol::DFRN]) && ($arr["parent-uri"] === $arr["uri"])) {
2541                         if (DBA::exists('contact', ['id' => $arr['contact-id'], 'forum' => true])) {
2542                                 $update = true;
2543                         }
2544                 }
2545
2546                 if ($update) {
2547                         DBA::update('contact', ['success_update' => $arr['received'], 'last-item' => $arr['received']],
2548                                 ['id' => $arr['contact-id']]);
2549                 }
2550                 // Now do the same for the system wide contacts with uid=0
2551                 if (!$arr['private']) {
2552                         DBA::update('contact', ['success_update' => $arr['received'], 'last-item' => $arr['received']],
2553                                 ['id' => $arr['owner-id']]);
2554
2555                         if ($arr['owner-id'] != $arr['author-id']) {
2556                                 DBA::update('contact', ['success_update' => $arr['received'], 'last-item' => $arr['received']],
2557                                         ['id' => $arr['author-id']]);
2558                         }
2559                 }
2560         }
2561
2562         public static function setHashtags(&$item)
2563         {
2564                 $tags = BBCode::getTags($item["body"]);
2565
2566                 // No hashtags?
2567                 if (!count($tags)) {
2568                         return false;
2569                 }
2570
2571                 // What happens in [code], stays in [code]!
2572                 // escape the # and the [
2573                 // hint: we will also get in trouble with #tags, when we want markdown in posts -> ### Headline 3
2574                 $item["body"] = preg_replace_callback("/\[code(.*?)\](.*?)\[\/code\]/ism",
2575                         function ($match) {
2576                                 // we truly ESCape all # and [ to prevent gettin weird tags in [code] blocks
2577                                 $find = ['#', '['];
2578                                 $replace = [chr(27).'sharp', chr(27).'leftsquarebracket'];
2579                                 return ("[code" . $match[1] . "]" . str_replace($find, $replace, $match[2]) . "[/code]");
2580                         }, $item["body"]);
2581
2582                 // This sorting is important when there are hashtags that are part of other hashtags
2583                 // Otherwise there could be problems with hashtags like #test and #test2
2584                 rsort($tags);
2585
2586                 $URLSearchString = "^\[\]";
2587
2588                 // All hashtags should point to the home server if "local_tags" is activated
2589                 if (Config::get('system', 'local_tags')) {
2590                         $item["body"] = preg_replace("/#\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",
2591                                         "#[url=".System::baseUrl()."/search?tag=$2]$2[/url]", $item["body"]);
2592
2593                         $item["tag"] = preg_replace("/#\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",
2594                                         "#[url=".System::baseUrl()."/search?tag=$2]$2[/url]", $item["tag"]);
2595                 }
2596
2597                 // mask hashtags inside of url, bookmarks and attachments to avoid urls in urls
2598                 $item["body"] = preg_replace_callback("/\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",
2599                         function ($match) {
2600                                 return ("[url=" . str_replace("#", "&num;", $match[1]) . "]" . str_replace("#", "&num;", $match[2]) . "[/url]");
2601                         }, $item["body"]);
2602
2603                 $item["body"] = preg_replace_callback("/\[bookmark\=([$URLSearchString]*)\](.*?)\[\/bookmark\]/ism",
2604                         function ($match) {
2605                                 return ("[bookmark=" . str_replace("#", "&num;", $match[1]) . "]" . str_replace("#", "&num;", $match[2]) . "[/bookmark]");
2606                         }, $item["body"]);
2607
2608                 $item["body"] = preg_replace_callback("/\[attachment (.*)\](.*?)\[\/attachment\]/ism",
2609                         function ($match) {
2610                                 return ("[attachment " . str_replace("#", "&num;", $match[1]) . "]" . $match[2] . "[/attachment]");
2611                         }, $item["body"]);
2612
2613                 // Repair recursive urls
2614                 $item["body"] = preg_replace("/&num;\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",
2615                                 "&num;$2", $item["body"]);
2616
2617                 foreach ($tags as $tag) {
2618                         if ((strpos($tag, '#') !== 0) || strpos($tag, '[url=') || $tag[1] == '#') {
2619                                 continue;
2620                         }
2621
2622                         $basetag = str_replace('_',' ',substr($tag,1));
2623                         $newtag = '#[url=' . System::baseUrl() . '/search?tag=' . $basetag . ']' . $basetag . '[/url]';
2624
2625                         $item["body"] = str_replace($tag, $newtag, $item["body"]);
2626
2627                         if (!stristr($item["tag"], "/search?tag=" . $basetag . "]" . $basetag . "[/url]")) {
2628                                 if (strlen($item["tag"])) {
2629                                         $item["tag"] = ',' . $item["tag"];
2630                                 }
2631                                 $item["tag"] = $newtag . $item["tag"];
2632                         }
2633                 }
2634
2635                 // Convert back the masked hashtags
2636                 $item["body"] = str_replace("&num;", "#", $item["body"]);
2637
2638                 // Remember! What happens in [code], stays in [code]
2639                 // roleback the # and [
2640                 $item["body"] = preg_replace_callback("/\[code(.*?)\](.*?)\[\/code\]/ism",
2641                         function ($match) {
2642                                 // we truly unESCape all sharp and leftsquarebracket
2643                                 $find = [chr(27).'sharp', chr(27).'leftsquarebracket'];
2644                                 $replace = ['#', '['];
2645                                 return ("[code" . $match[1] . "]" . str_replace($find, $replace, $match[2]) . "[/code]");
2646                         }, $item["body"]);
2647         }
2648
2649         /**
2650          * look for mention tags and setup a second delivery chain for forum/community posts if appropriate
2651          *
2652          * @param int $uid
2653          * @param int $item_id
2654          * @return boolean true if item was deleted, else false
2655          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
2656          * @throws \ImagickException
2657          */
2658         private static function tagDeliver($uid, $item_id)
2659         {
2660                 $mention = false;
2661
2662                 $user = DBA::selectFirst('user', [], ['uid' => $uid]);
2663                 if (!DBA::isResult($user)) {
2664                         return false;
2665                 }
2666
2667                 $community_page = (($user['page-flags'] == User::PAGE_FLAGS_COMMUNITY) ? true : false);
2668                 $prvgroup = (($user['page-flags'] == User::PAGE_FLAGS_PRVGROUP) ? true : false);
2669
2670                 $item = self::selectFirst(self::ITEM_FIELDLIST, ['id' => $item_id]);
2671                 if (!DBA::isResult($item)) {
2672                         return false;
2673                 }
2674
2675                 $link = Strings::normaliseLink(System::baseUrl() . '/profile/' . $user['nickname']);
2676
2677                 /*
2678                  * Diaspora uses their own hardwired link URL in @-tags
2679                  * instead of the one we supply with webfinger
2680                  */
2681                 $dlink = Strings::normaliseLink(System::baseUrl() . '/u/' . $user['nickname']);
2682
2683                 $cnt = preg_match_all('/[\@\!]\[url\=(.*?)\](.*?)\[\/url\]/ism', $item['body'], $matches, PREG_SET_ORDER);
2684                 if ($cnt) {
2685                         foreach ($matches as $mtch) {
2686                                 if (Strings::compareLink($link, $mtch[1]) || Strings::compareLink($dlink, $mtch[1])) {
2687                                         $mention = true;
2688                                         Logger::log('mention found: ' . $mtch[2]);
2689                                 }
2690                         }
2691                 }
2692
2693                 if (!$mention) {
2694                         if (($community_page || $prvgroup) &&
2695                                   !$item['wall'] && !$item['origin'] && ($item['id'] == $item['parent'])) {
2696                                 // mmh.. no mention.. community page or private group... no wall.. no origin.. top-post (not a comment)
2697                                 // delete it!
2698                                 Logger::log("no-mention top-level post to community or private group. delete.");
2699                                 DBA::delete('item', ['id' => $item_id]);
2700                                 return true;
2701                         }
2702                         return false;
2703                 }
2704
2705                 $arr = ['item' => $item, 'user' => $user];
2706
2707                 Hook::callAll('tagged', $arr);
2708
2709                 if (!$community_page && !$prvgroup) {
2710                         return false;
2711                 }
2712
2713                 /*
2714                  * tgroup delivery - setup a second delivery chain
2715                  * prevent delivery looping - only proceed
2716                  * if the message originated elsewhere and is a top-level post
2717                  */
2718                 if ($item['wall'] || $item['origin'] || ($item['id'] != $item['parent'])) {
2719                         return false;
2720                 }
2721
2722                 // now change this copy of the post to a forum head message and deliver to all the tgroup members
2723                 $self = DBA::selectFirst('contact', ['id', 'name', 'url', 'thumb'], ['uid' => $uid, 'self' => true]);
2724                 if (!DBA::isResult($self)) {
2725                         return false;
2726                 }
2727
2728                 $owner_id = Contact::getIdForURL($self['url']);
2729
2730                 // also reset all the privacy bits to the forum default permissions
2731
2732                 $private = ($user['allow_cid'] || $user['allow_gid'] || $user['deny_cid'] || $user['deny_gid']) ? 1 : 0;
2733
2734                 $psid = PermissionSet::fetchIDForPost($user);
2735
2736                 $forum_mode = ($prvgroup ? 2 : 1);
2737
2738                 $fields = ['wall' => true, 'origin' => true, 'forum_mode' => $forum_mode, 'contact-id' => $self['id'],
2739                         'owner-id' => $owner_id, 'private' => $private, 'psid' => $psid];
2740                 self::update($fields, ['id' => $item_id]);
2741
2742                 self::updateThread($item_id);
2743
2744                 Worker::add(['priority' => PRIORITY_HIGH, 'dont_fork' => true], 'Notifier', Delivery::POST, $item_id);
2745
2746                 return false;
2747         }
2748
2749         public static function isRemoteSelf($contact, &$datarray)
2750         {
2751                 $a = \get_app();
2752
2753                 if (!$contact['remote_self']) {
2754                         return false;
2755                 }
2756
2757                 // Prevent the forwarding of posts that are forwarded
2758                 if (!empty($datarray["extid"]) && ($datarray["extid"] == Protocol::DFRN)) {
2759                         Logger::log('Already forwarded', Logger::DEBUG);
2760                         return false;
2761                 }
2762
2763                 // Prevent to forward already forwarded posts
2764                 if ($datarray["app"] == $a->getHostName()) {
2765                         Logger::log('Already forwarded (second test)', Logger::DEBUG);
2766                         return false;
2767                 }
2768
2769                 // Only forward posts
2770                 if ($datarray["verb"] != Activity::POST) {
2771                         Logger::log('No post', Logger::DEBUG);
2772                         return false;
2773                 }
2774
2775                 if (($contact['network'] != Protocol::FEED) && $datarray['private']) {
2776                         Logger::log('Not public', Logger::DEBUG);
2777                         return false;
2778                 }
2779
2780                 $datarray2 = $datarray;
2781                 Logger::log('remote-self start - Contact '.$contact['url'].' - '.$contact['remote_self'].' Item '.print_r($datarray, true), Logger::DEBUG);
2782                 if ($contact['remote_self'] == 2) {
2783                         $self = DBA::selectFirst('contact', ['id', 'name', 'url', 'thumb'],
2784                                         ['uid' => $contact['uid'], 'self' => true]);
2785                         if (DBA::isResult($self)) {
2786                                 $datarray['contact-id'] = $self["id"];
2787
2788                                 $datarray['owner-name'] = $self["name"];
2789                                 $datarray['owner-link'] = $self["url"];
2790                                 $datarray['owner-avatar'] = $self["thumb"];
2791
2792                                 $datarray['author-name']   = $datarray['owner-name'];
2793                                 $datarray['author-link']   = $datarray['owner-link'];
2794                                 $datarray['author-avatar'] = $datarray['owner-avatar'];
2795
2796                                 unset($datarray['edited']);
2797
2798                                 unset($datarray['network']);
2799                                 unset($datarray['owner-id']);
2800                                 unset($datarray['author-id']);
2801                         }
2802
2803                         if ($contact['network'] != Protocol::FEED) {
2804                                 $datarray["guid"] = System::createUUID();
2805                                 unset($datarray["plink"]);
2806                                 $datarray["uri"] = self::newURI($contact['uid'], $datarray["guid"]);
2807                                 $datarray["parent-uri"] = $datarray["uri"];
2808                                 $datarray["thr-parent"] = $datarray["uri"];
2809                                 $datarray["extid"] = Protocol::DFRN;
2810                                 $urlpart = parse_url($datarray2['author-link']);
2811                                 $datarray["app"] = $urlpart["host"];
2812                         } else {
2813                                 $datarray['private'] = 0;
2814                         }
2815                 }
2816
2817                 if ($contact['network'] != Protocol::FEED) {
2818                         // Store the original post
2819                         $result = self::insert($datarray2, false, false);
2820                         Logger::log('remote-self post original item - Contact '.$contact['url'].' return '.$result.' Item '.print_r($datarray2, true), Logger::DEBUG);
2821                 } else {
2822                         $datarray["app"] = "Feed";
2823                         $result = true;
2824                 }
2825
2826                 // Trigger automatic reactions for addons
2827                 $datarray['api_source'] = true;
2828
2829                 // We have to tell the hooks who we are - this really should be improved
2830                 $_SESSION["authenticated"] = true;
2831                 $_SESSION["uid"] = $contact['uid'];
2832
2833                 return $result;
2834         }
2835
2836         /**
2837          *
2838          * @param string $s
2839          * @param int    $uid
2840          * @param array  $item
2841          * @param int    $cid
2842          * @return string
2843          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
2844          * @throws \ImagickException
2845          */
2846         public static function fixPrivatePhotos($s, $uid, $item = null, $cid = 0)
2847         {
2848                 if (Config::get('system', 'disable_embedded')) {
2849                         return $s;
2850                 }
2851
2852                 Logger::log('check for photos', Logger::DEBUG);
2853                 $site = substr(System::baseUrl(), strpos(System::baseUrl(), '://'));
2854
2855                 $orig_body = $s;
2856                 $new_body = '';
2857
2858                 $img_start = strpos($orig_body, '[img');
2859                 $img_st_close = ($img_start !== false ? strpos(substr($orig_body, $img_start), ']') : false);
2860                 $img_len = ($img_start !== false ? strpos(substr($orig_body, $img_start + $img_st_close + 1), '[/img]') : false);
2861
2862                 while (($img_st_close !== false) && ($img_len !== false)) {
2863                         $img_st_close++; // make it point to AFTER the closing bracket
2864                         $image = substr($orig_body, $img_start + $img_st_close, $img_len);
2865
2866                         Logger::log('found photo ' . $image, Logger::DEBUG);
2867
2868                         if (stristr($image, $site . '/photo/')) {
2869                                 // Only embed locally hosted photos
2870                                 $replace = false;
2871                                 $i = basename($image);
2872                                 $i = str_replace(['.jpg', '.png', '.gif'], ['', '', ''], $i);
2873                                 $x = strpos($i, '-');
2874
2875                                 if ($x) {
2876                                         $res = substr($i, $x + 1);
2877                                         $i = substr($i, 0, $x);
2878                                         $photo = Photo::getPhotoForUser($uid, $i, $res);
2879                                         if (DBA::isResult($photo)) {
2880                                                 /*
2881                                                  * Check to see if we should replace this photo link with an embedded image
2882                                                  * 1. No need to do so if the photo is public
2883                                                  * 2. If there's a contact-id provided, see if they're in the access list
2884                                                  *    for the photo. If so, embed it.
2885                                                  * 3. Otherwise, if we have an item, see if the item permissions match the photo
2886                                                  *    permissions, regardless of order but first check to see if they're an exact
2887                                                  *    match to save some processing overhead.
2888                                                  */
2889                                                 if (self::hasPermissions($photo)) {
2890                                                         if ($cid) {
2891                                                                 $recips = self::enumeratePermissions($photo);
2892                                                                 if (in_array($cid, $recips)) {
2893                                                                         $replace = true;
2894                                                                 }
2895                                                         } elseif ($item) {
2896                                                                 if (self::samePermissions($uid, $item, $photo)) {
2897                                                                         $replace = true;
2898                                                                 }
2899                                                         }
2900                                                 }
2901                                                 if ($replace) {
2902                                                         $photo_img = Photo::getImageForPhoto($photo);
2903                                                         // If a custom width and height were specified, apply before embedding
2904                                                         if (preg_match("/\[img\=([0-9]*)x([0-9]*)\]/is", substr($orig_body, $img_start, $img_st_close), $match)) {
2905                                                                 Logger::log('scaling photo', Logger::DEBUG);
2906
2907                                                                 $width = intval($match[1]);
2908                                                                 $height = intval($match[2]);
2909
2910                                                                 $photo_img->scaleDown(max($width, $height));
2911                                                         }
2912
2913                                                         $data = $photo_img->asString();
2914                                                         $type = $photo_img->getType();
2915
2916                                                         Logger::log('replacing photo', Logger::DEBUG);
2917                                                         $image = 'data:' . $type . ';base64,' . base64_encode($data);
2918                                                         Logger::log('replaced: ' . $image, Logger::DATA);
2919                                                 }
2920                                         }
2921                                 }
2922                         }
2923
2924                         $new_body = $new_body . substr($orig_body, 0, $img_start + $img_st_close) . $image . '[/img]';
2925                         $orig_body = substr($orig_body, $img_start + $img_st_close + $img_len + strlen('[/img]'));
2926                         if ($orig_body === false) {
2927                                 $orig_body = '';
2928                         }
2929
2930                         $img_start = strpos($orig_body, '[img');
2931                         $img_st_close = ($img_start !== false ? strpos(substr($orig_body, $img_start), ']') : false);
2932                         $img_len = ($img_start !== false ? strpos(substr($orig_body, $img_start + $img_st_close + 1), '[/img]') : false);
2933                 }
2934
2935                 $new_body = $new_body . $orig_body;
2936
2937                 return $new_body;
2938         }
2939
2940         private static function hasPermissions($obj)
2941         {
2942                 return !empty($obj['allow_cid']) || !empty($obj['allow_gid']) ||
2943                         !empty($obj['deny_cid']) || !empty($obj['deny_gid']);
2944         }
2945
2946         private static function samePermissions($uid, $obj1, $obj2)
2947         {
2948                 // first part is easy. Check that these are exactly the same.
2949                 if (($obj1['allow_cid'] == $obj2['allow_cid'])
2950                         && ($obj1['allow_gid'] == $obj2['allow_gid'])
2951                         && ($obj1['deny_cid'] == $obj2['deny_cid'])
2952                         && ($obj1['deny_gid'] == $obj2['deny_gid'])) {
2953                         return true;
2954                 }
2955
2956                 // This is harder. Parse all the permissions and compare the resulting set.
2957                 $recipients1 = self::enumeratePermissions($obj1);
2958                 $recipients2 = self::enumeratePermissions($obj2);
2959                 sort($recipients1);
2960                 sort($recipients2);
2961
2962                 /// @TODO Comparison of arrays, maybe use array_diff_assoc() here?
2963                 return ($recipients1 == $recipients2);
2964         }
2965
2966         /**
2967          * Returns an array of contact-ids that are allowed to see this object
2968          *
2969          * @param array $obj        Item array with at least uid, allow_cid, allow_gid, deny_cid and deny_gid
2970          * @param bool  $check_dead Prunes unavailable contacts from the result
2971          * @return array
2972          * @throws \Exception
2973          */
2974         public static function enumeratePermissions(array $obj, bool $check_dead = false)
2975         {
2976                 /** @var ACLFormatter $aclFormater */
2977                 $aclFormater = self::getClass(ACLFormatter::class);
2978
2979                 $allow_people = $aclFormater->expand($obj['allow_cid']);
2980                 $allow_groups = Group::expand($obj['uid'], $aclFormater->expand($obj['allow_gid']), $check_dead);
2981                 $deny_people  = $aclFormater->expand($obj['deny_cid']);
2982                 $deny_groups  = Group::expand($obj['uid'], $aclFormater->expand($obj['deny_gid']), $check_dead);
2983                 $recipients   = array_unique(array_merge($allow_people, $allow_groups));
2984                 $deny         = array_unique(array_merge($deny_people, $deny_groups));
2985                 $recipients   = array_diff($recipients, $deny);
2986                 return $recipients;
2987         }
2988
2989         public static function getFeedTags($item)
2990         {
2991                 $ret = [];
2992                 $matches = false;
2993                 $cnt = preg_match_all('|\#\[url\=(.*?)\](.*?)\[\/url\]|', $item['tag'], $matches);
2994                 if ($cnt) {
2995                         for ($x = 0; $x < $cnt; $x ++) {
2996                                 if ($matches[1][$x]) {
2997                                         $ret[$matches[2][$x]] = ['#', $matches[1][$x], $matches[2][$x]];
2998                                 }
2999                         }
3000                 }
3001                 $matches = false;
3002                 $cnt = preg_match_all('|\@\[url\=(.*?)\](.*?)\[\/url\]|', $item['tag'], $matches);
3003                 if ($cnt) {
3004                         for ($x = 0; $x < $cnt; $x ++) {
3005                                 if ($matches[1][$x]) {
3006                                         $ret[] = ['@', $matches[1][$x], $matches[2][$x]];
3007                                 }
3008                         }
3009                 }
3010                 return $ret;
3011         }
3012
3013         public static function expire($uid, $days, $network = "", $force = false)
3014         {
3015                 if (!$uid || ($days < 1)) {
3016                         return;
3017                 }
3018
3019                 $condition = ["`uid` = ? AND NOT `deleted` AND `id` = `parent` AND `gravity` = ?",
3020                         $uid, GRAVITY_PARENT];
3021
3022                 /*
3023                  * $expire_network_only = save your own wall posts
3024                  * and just expire conversations started by others
3025                  */
3026                 $expire_network_only = PConfig::get($uid, 'expire', 'network_only', false);
3027
3028                 if ($expire_network_only) {
3029                         $condition[0] .= " AND NOT `wall`";
3030                 }
3031
3032                 if ($network != "") {
3033                         $condition[0] .= " AND `network` = ?";
3034                         $condition[] = $network;
3035                 }
3036
3037                 $condition[0] .= " AND `received` < UTC_TIMESTAMP() - INTERVAL ? DAY";
3038                 $condition[] = $days;
3039
3040                 $items = self::select(['file', 'resource-id', 'starred', 'type', 'id', 'post-type'], $condition);
3041
3042                 if (!DBA::isResult($items)) {
3043                         return;
3044                 }
3045
3046                 $expire_items = PConfig::get($uid, 'expire', 'items', true);
3047
3048                 // Forcing expiring of items - but not notes and marked items
3049                 if ($force) {
3050                         $expire_items = true;
3051                 }
3052
3053                 $expire_notes = PConfig::get($uid, 'expire', 'notes', true);
3054                 $expire_starred = PConfig::get($uid, 'expire', 'starred', true);
3055                 $expire_photos = PConfig::get($uid, 'expire', 'photos', false);
3056
3057                 $expired = 0;
3058
3059                 while ($item = Item::fetch($items)) {
3060                         // don't expire filed items
3061
3062                         if (strpos($item['file'], '[') !== false) {
3063                                 continue;
3064                         }
3065
3066                         // Only expire posts, not photos and photo comments
3067
3068                         if (!$expire_photos && strlen($item['resource-id'])) {
3069                                 continue;
3070                         } elseif (!$expire_starred && intval($item['starred'])) {
3071                                 continue;
3072                         } elseif (!$expire_notes && (($item['type'] == 'note') || ($item['post-type'] == Item::PT_PERSONAL_NOTE))) {
3073                                 continue;
3074                         } elseif (!$expire_items && ($item['type'] != 'note') && ($item['post-type'] != Item::PT_PERSONAL_NOTE)) {
3075                                 continue;
3076                         }
3077
3078                         self::deleteById($item['id'], PRIORITY_LOW);
3079
3080                         ++$expired;
3081                 }
3082                 DBA::close($items);
3083                 Logger::log('User ' . $uid . ": expired $expired items; expire items: $expire_items, expire notes: $expire_notes, expire starred: $expire_starred, expire photos: $expire_photos");
3084         }
3085
3086         public static function firstPostDate($uid, $wall = false)
3087         {
3088                 $condition = ['uid' => $uid, 'wall' => $wall, 'deleted' => false, 'visible' => true, 'moderated' => false];
3089                 $params = ['order' => ['received' => false]];
3090                 $thread = DBA::selectFirst('thread', ['received'], $condition, $params);
3091                 if (DBA::isResult($thread)) {
3092                         return substr(DateTimeFormat::local($thread['received']), 0, 10);
3093                 }
3094                 return false;
3095         }
3096
3097         /**
3098          * @brief add/remove activity to an item
3099          *
3100          * Toggle activities as like,dislike,attend of an item
3101          *
3102          * @param string $item_id
3103          * @param string $verb
3104          *            Activity verb. One of
3105          *            like, unlike, dislike, undislike, attendyes, unattendyes,
3106          *            attendno, unattendno, attendmaybe, unattendmaybe
3107          * @return bool
3108          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
3109          * @throws \ImagickException
3110          * @hook  'post_local_end'
3111          *            array $arr
3112          *            'post_id' => ID of posted item
3113          */
3114         public static function performLike($item_id, $verb)
3115         {
3116                 if (!Session::isAuthenticated()) {
3117                         return false;
3118                 }
3119
3120                 switch ($verb) {
3121                         case 'like':
3122                         case 'unlike':
3123                                 $activity = Activity::LIKE;
3124                                 break;
3125                         case 'dislike':
3126                         case 'undislike':
3127                                 $activity = Activity::DISLIKE;
3128                                 break;
3129                         case 'attendyes':
3130                         case 'unattendyes':
3131                                 $activity = Activity::ATTEND;
3132                                 break;
3133                         case 'attendno':
3134                         case 'unattendno':
3135                                 $activity = Activity::ATTENDNO;
3136                                 break;
3137                         case 'attendmaybe':
3138                         case 'unattendmaybe':
3139                                 $activity = Activity::ATTENDMAYBE;
3140                                 break;
3141                         default:
3142                                 Logger::log('like: unknown verb ' . $verb . ' for item ' . $item_id);
3143                                 return false;
3144                 }
3145
3146                 // Enable activity toggling instead of on/off
3147                 $event_verb_flag = $activity === Activity::ATTEND || $activity === Activity::ATTENDNO || $activity === Activity::ATTENDMAYBE;
3148
3149                 Logger::log('like: verb ' . $verb . ' item ' . $item_id);
3150
3151                 $item = self::selectFirst(self::ITEM_FIELDLIST, ['`id` = ? OR `uri` = ?', $item_id, $item_id]);
3152                 if (!DBA::isResult($item)) {
3153                         Logger::log('like: unknown item ' . $item_id);
3154                         return false;
3155                 }
3156
3157                 $item_uri = $item['uri'];
3158
3159                 $uid = $item['uid'];
3160                 if (($uid == 0) && local_user()) {
3161                         $uid = local_user();
3162                 }
3163
3164                 if (!Security::canWriteToUserWall($uid)) {
3165                         Logger::log('like: unable to write on wall ' . $uid);
3166                         return false;
3167                 }
3168
3169                 // Retrieves the local post owner
3170                 $owner_self_contact = DBA::selectFirst('contact', [], ['uid' => $uid, 'self' => true]);
3171                 if (!DBA::isResult($owner_self_contact)) {
3172                         Logger::log('like: unknown owner ' . $uid);
3173                         return false;
3174                 }
3175
3176                 // Retrieve the current logged in user's public contact
3177                 $author_id = public_contact();
3178
3179                 $author_contact = DBA::selectFirst('contact', ['url'], ['id' => $author_id]);
3180                 if (!DBA::isResult($author_contact)) {
3181                         Logger::log('like: unknown author ' . $author_id);
3182                         return false;
3183                 }
3184
3185                 // Contact-id is the uid-dependant author contact
3186                 if (local_user() == $uid) {
3187                         $item_contact_id = $owner_self_contact['id'];
3188                 } else {
3189                         $item_contact_id = Contact::getIdForURL($author_contact['url'], $uid, true);
3190                         $item_contact = DBA::selectFirst('contact', [], ['id' => $item_contact_id]);
3191                         if (!DBA::isResult($item_contact)) {
3192                                 Logger::log('like: unknown item contact ' . $item_contact_id);
3193                                 return false;
3194                         }
3195                 }
3196
3197                 // Look for an existing verb row
3198                 // event participation are essentially radio toggles. If you make a subsequent choice,
3199                 // we need to eradicate your first choice.
3200                 if ($event_verb_flag) {
3201                         $verbs = [Activity::ATTEND, Activity::ATTENDNO, Activity::ATTENDMAYBE];
3202
3203                         // Translate to the index based activity index
3204                         $activities = [];
3205                         foreach ($verbs as $verb) {
3206                                 $activities[] = self::activityToIndex($verb);
3207                         }
3208                 } else {
3209                         $activities = self::activityToIndex($activity);
3210                 }
3211
3212                 $condition = ['activity' => $activities, 'deleted' => false, 'gravity' => GRAVITY_ACTIVITY,
3213                         'author-id' => $author_id, 'uid' => $item['uid'], 'thr-parent' => $item_uri];
3214
3215                 $like_item = self::selectFirst(['id', 'guid', 'verb'], $condition);
3216
3217                 // If it exists, mark it as deleted
3218                 if (DBA::isResult($like_item)) {
3219                         self::deleteById($like_item['id']);
3220
3221                         if (!$event_verb_flag || $like_item['verb'] == $activity) {
3222                                 return true;
3223                         }
3224                 }
3225
3226                 // Verb is "un-something", just trying to delete existing entries
3227                 if (strpos($verb, 'un') === 0) {
3228                         return true;
3229                 }
3230
3231                 $objtype = $item['resource-id'] ? Activity\ObjectType::IMAGE : Activity\ObjectType::NOTE;
3232
3233                 $new_item = [
3234                         'guid'          => System::createUUID(),
3235                         'uri'           => self::newURI($item['uid']),
3236                         'uid'           => $item['uid'],
3237                         'contact-id'    => $item_contact_id,
3238                         'wall'          => $item['wall'],
3239                         'origin'        => 1,
3240                         'network'       => Protocol::DFRN,
3241                         'gravity'       => GRAVITY_ACTIVITY,
3242                         'parent'        => $item['id'],
3243                         'parent-uri'    => $item['uri'],
3244                         'thr-parent'    => $item['uri'],
3245                         'owner-id'      => $author_id,
3246                         'author-id'     => $author_id,
3247                         'body'          => $activity,
3248                         'verb'          => $activity,
3249                         'object-type'   => $objtype,
3250                         'allow_cid'     => $item['allow_cid'],
3251                         'allow_gid'     => $item['allow_gid'],
3252                         'deny_cid'      => $item['deny_cid'],
3253                         'deny_gid'      => $item['deny_gid'],
3254                         'visible'       => 1,
3255                         'unseen'        => 1,
3256                 ];
3257
3258                 $signed = Diaspora::createLikeSignature($uid, $new_item);
3259                 if (!empty($signed)) {
3260                         $new_item['diaspora_signed_text'] = json_encode($signed);
3261                 }
3262
3263                 $new_item_id = self::insert($new_item);
3264
3265                 // If the parent item isn't visible then set it to visible
3266                 if (!$item['visible']) {
3267                         self::update(['visible' => true], ['id' => $item['id']]);
3268                 }
3269
3270                 $new_item['id'] = $new_item_id;
3271
3272                 Hook::callAll('post_local_end', $new_item);
3273
3274                 return true;
3275         }
3276
3277         private static function addThread($itemid, $onlyshadow = false)
3278         {
3279                 $fields = ['uid', 'created', 'edited', 'commented', 'received', 'changed', 'wall', 'private', 'pubmail',
3280                         'moderated', 'visible', 'starred', 'contact-id', 'post-type',
3281                         'deleted', 'origin', 'forum_mode', 'mention', 'network', 'author-id', 'owner-id'];
3282                 $condition = ["`id` = ? AND (`parent` = ? OR `parent` = 0)", $itemid, $itemid];
3283                 $item = self::selectFirst($fields, $condition);
3284
3285                 if (!DBA::isResult($item)) {
3286                         return;
3287                 }
3288
3289                 $item['iid'] = $itemid;
3290
3291                 if (!$onlyshadow) {
3292                         $result = DBA::insert('thread', $item);
3293
3294                         Logger::log("Add thread for item ".$itemid." - ".print_r($result, true), Logger::DEBUG);
3295                 }
3296         }
3297
3298         private static function updateThread($itemid, $setmention = false)
3299         {
3300                 $fields = ['uid', 'guid', 'created', 'edited', 'commented', 'received', 'changed', 'post-type',
3301                         'wall', 'private', 'pubmail', 'moderated', 'visible', 'starred', 'contact-id',
3302                         'deleted', 'origin', 'forum_mode', 'network', 'author-id', 'owner-id'];
3303                 $condition = ["`id` = ? AND (`parent` = ? OR `parent` = 0)", $itemid, $itemid];
3304
3305                 $item = self::selectFirst($fields, $condition);
3306                 if (!DBA::isResult($item)) {
3307                         return;
3308                 }
3309
3310                 if ($setmention) {
3311                         $item["mention"] = 1;
3312                 }
3313
3314                 $fields = [];
3315
3316                 foreach ($item as $field => $data) {
3317                         if (!in_array($field, ["guid"])) {
3318                                 $fields[$field] = $data;
3319                         }
3320                 }
3321
3322                 $result = DBA::update('thread', $fields, ['iid' => $itemid]);
3323
3324                 Logger::log("Update thread for item ".$itemid." - guid ".$item["guid"]." - ".(int)$result, Logger::DEBUG);
3325         }
3326
3327         private static function deleteThread($itemid, $itemuri = "")
3328         {
3329                 $item = DBA::selectFirst('thread', ['uid'], ['iid' => $itemid]);
3330                 if (!DBA::isResult($item)) {
3331                         Logger::log('No thread found for id '.$itemid, Logger::DEBUG);
3332                         return;
3333                 }
3334
3335                 $result = DBA::delete('thread', ['iid' => $itemid], ['cascade' => false]);
3336
3337                 Logger::log("deleteThread: Deleted thread for item ".$itemid." - ".print_r($result, true), Logger::DEBUG);
3338
3339                 if ($itemuri != "") {
3340                         $condition = ["`uri` = ? AND NOT `deleted` AND NOT (`uid` IN (?, 0))", $itemuri, $item["uid"]];
3341                         if (!self::exists($condition)) {
3342                                 DBA::delete('item', ['uri' => $itemuri, 'uid' => 0]);
3343                                 Logger::log("deleteThread: Deleted shadow for item ".$itemuri, Logger::DEBUG);
3344                         }
3345                 }
3346         }
3347
3348         public static function getPermissionsSQLByUserId($owner_id)
3349         {
3350                 $local_user = local_user();
3351                 $remote_user = Session::getRemoteContactID($owner_id);
3352
3353                 /*
3354                  * Construct permissions
3355                  *
3356                  * default permissions - anonymous user
3357                  */
3358                 $sql = " AND NOT `item`.`private`";
3359
3360                 // Profile owner - everything is visible
3361                 if ($local_user && ($local_user == $owner_id)) {
3362                         $sql = '';
3363                 } elseif ($remote_user) {
3364                         /*
3365                          * Authenticated visitor. Unless pre-verified,
3366                          * check that the contact belongs to this $owner_id
3367                          * and load the groups the visitor belongs to.
3368                          * If pre-verified, the caller is expected to have already
3369                          * done this and passed the groups into this function.
3370                          */
3371                         $set = PermissionSet::get($owner_id, $remote_user);
3372
3373                         if (!empty($set)) {
3374                                 $sql_set = " OR (`item`.`private` IN (1,2) AND `item`.`wall` AND `item`.`psid` IN (" . implode(',', $set) . "))";
3375                         } else {
3376                                 $sql_set = '';
3377                         }
3378
3379                         $sql = " AND (NOT `item`.`private`" . $sql_set . ")";
3380                 }
3381
3382                 return $sql;
3383         }
3384
3385         /**
3386          * get translated item type
3387          *
3388          * @param $item
3389          * @return string
3390          */
3391         public static function postType($item)
3392         {
3393                 if (!empty($item['event-id'])) {
3394                         return L10n::t('event');
3395                 } elseif (!empty($item['resource-id'])) {
3396                         return L10n::t('photo');
3397                 } elseif (!empty($item['verb']) && $item['verb'] !== Activity::POST) {
3398                         return L10n::t('activity');
3399                 } elseif ($item['id'] != $item['parent']) {
3400                         return L10n::t('comment');
3401                 }
3402
3403                 return L10n::t('post');
3404         }
3405
3406         /**
3407          * Sets the "rendered-html" field of the provided item
3408          *
3409          * Body is preserved to avoid side-effects as we modify it just-in-time for spoilers and private image links
3410          *
3411          * @param array $item
3412          * @param bool  $update
3413          *
3414          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
3415          * @todo Remove reference, simply return "rendered-html" and "rendered-hash"
3416          */
3417         public static function putInCache(&$item, $update = false)
3418         {
3419                 $body = $item["body"];
3420
3421                 $rendered_hash = $item['rendered-hash'] ?? '';
3422                 $rendered_html = $item['rendered-html'] ?? '';
3423
3424                 if ($rendered_hash == ''
3425                         || $rendered_html == ""
3426                         || $rendered_hash != hash("md5", $item["body"])
3427                         || Config::get("system", "ignore_cache")
3428                 ) {
3429                         self::addRedirToImageTags($item);
3430
3431                         $item["rendered-html"] = BBCode::convert($item["body"]);
3432                         $item["rendered-hash"] = hash("md5", $item["body"]);
3433
3434                         $hook_data = ['item' => $item, 'rendered-html' => $item['rendered-html'], 'rendered-hash' => $item['rendered-hash']];
3435                         Hook::callAll('put_item_in_cache', $hook_data);
3436                         $item['rendered-html'] = $hook_data['rendered-html'];
3437                         $item['rendered-hash'] = $hook_data['rendered-hash'];
3438                         unset($hook_data);
3439
3440                         // Force an update if the generated values differ from the existing ones
3441                         if ($rendered_hash != $item["rendered-hash"]) {
3442                                 $update = true;
3443                         }
3444
3445                         // Only compare the HTML when we forcefully ignore the cache
3446                         if (Config::get("system", "ignore_cache") && ($rendered_html != $item["rendered-html"])) {
3447                                 $update = true;
3448                         }
3449
3450                         if ($update && !empty($item["id"])) {
3451                                 self::update(
3452                                         [
3453                                                 'rendered-html' => $item["rendered-html"],
3454                                                 'rendered-hash' => $item["rendered-hash"]
3455                                         ],
3456                                         ['id' => $item["id"]]
3457                                 );
3458                         }
3459                 }
3460
3461                 $item["body"] = $body;
3462         }
3463
3464         /**
3465          * @brief Find any non-embedded images in private items and add redir links to them
3466          *
3467          * @param array &$item The field array of an item row
3468          */
3469         private static function addRedirToImageTags(array &$item)
3470         {
3471                 $app = self::getApp();
3472
3473                 $matches = [];
3474                 $cnt = preg_match_all('|\[img\](http[^\[]*?/photo/[a-fA-F0-9]+?(-[0-9]\.[\w]+?)?)\[\/img\]|', $item['body'], $matches, PREG_SET_ORDER);
3475                 if ($cnt) {
3476                         foreach ($matches as $mtch) {
3477                                 if (strpos($mtch[1], '/redir') !== false) {
3478                                         continue;
3479                                 }
3480
3481                                 if ((local_user() == $item['uid']) && ($item['private'] == 1) && ($item['contact-id'] != $app->contact['id']) && ($item['network'] == Protocol::DFRN)) {
3482                                         $img_url = 'redir/' . $item['contact-id'] . '?url=' . urlencode($mtch[1]);
3483                                         $item['body'] = str_replace($mtch[0], '[img]' . $img_url . '[/img]', $item['body']);
3484                                 }
3485                         }
3486                 }
3487         }
3488
3489         /**
3490          * @brief Given an item array, convert the body element from bbcode to html and add smilie icons.
3491          * If attach is true, also add icons for item attachments.
3492          *
3493          * @param array   $item
3494          * @param boolean $attach
3495          * @param boolean $is_preview
3496          * @return string item body html
3497          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
3498          * @throws \ImagickException
3499          * @hook  prepare_body_init item array before any work
3500          * @hook  prepare_body_content_filter ('item'=>item array, 'filter_reasons'=>string array) before first bbcode to html
3501          * @hook  prepare_body ('item'=>item array, 'html'=>body string, 'is_preview'=>boolean, 'filter_reasons'=>string array) after first bbcode to html
3502          * @hook  prepare_body_final ('item'=>item array, 'html'=>body string) after attach icons and blockquote special case handling (spoiler, author)
3503          */
3504         public static function prepareBody(array &$item, $attach = false, $is_preview = false)
3505         {
3506                 $a = self::getApp();
3507                 Hook::callAll('prepare_body_init', $item);
3508
3509                 // In order to provide theme developers more possibilities, event items
3510                 // are treated differently.
3511                 if ($item['object-type'] === Activity\ObjectType::EVENT && isset($item['event-id'])) {
3512                         $ev = Event::getItemHTML($item);
3513                         return $ev;
3514                 }
3515
3516                 $tags = Term::populateTagsFromItem($item);
3517
3518                 $item['tags'] = $tags['tags'];
3519                 $item['hashtags'] = $tags['hashtags'];
3520                 $item['mentions'] = $tags['mentions'];
3521
3522                 // Compile eventual content filter reasons
3523                 $filter_reasons = [];
3524                 if (!$is_preview && public_contact() != $item['author-id']) {
3525                         if (!empty($item['content-warning']) && (!local_user() || !PConfig::get(local_user(), 'system', 'disable_cw', false))) {
3526                                 $filter_reasons[] = L10n::t('Content warning: %s', $item['content-warning']);
3527                         }
3528
3529                         $hook_data = [
3530                                 'item' => $item,
3531                                 'filter_reasons' => $filter_reasons
3532                         ];
3533                         Hook::callAll('prepare_body_content_filter', $hook_data);
3534                         $filter_reasons = $hook_data['filter_reasons'];
3535                         unset($hook_data);
3536                 }
3537
3538                 // Update the cached values if there is no "zrl=..." on the links.
3539                 $update = (!Session::isAuthenticated() && ($item["uid"] == 0));
3540
3541                 // Or update it if the current viewer is the intented viewer.
3542                 if (($item["uid"] == local_user()) && ($item["uid"] != 0)) {
3543                         $update = true;
3544                 }
3545
3546                 self::putInCache($item, $update);
3547                 $s = $item["rendered-html"];
3548
3549                 $hook_data = [
3550                         'item' => $item,
3551                         'html' => $s,
3552                         'preview' => $is_preview,
3553                         'filter_reasons' => $filter_reasons
3554                 ];
3555                 Hook::callAll('prepare_body', $hook_data);
3556                 $s = $hook_data['html'];
3557                 unset($hook_data);
3558
3559                 if (!$attach) {
3560                         // Replace the blockquotes with quotes that are used in mails.
3561                         $mailquote = '<blockquote type="cite" class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">';
3562                         $s = str_replace(['<blockquote>', '<blockquote class="spoiler">', '<blockquote class="author">'], [$mailquote, $mailquote, $mailquote], $s);
3563                         return $s;
3564                 }
3565
3566                 $as = '';
3567                 $vhead = false;
3568                 $matches = [];
3569                 preg_match_all('|\[attach\]href=\"(.*?)\" length=\"(.*?)\" type=\"(.*?)\"(?: title=\"(.*?)\")?|', $item['attach'], $matches, PREG_SET_ORDER);
3570                 foreach ($matches as $mtch) {
3571                         $mime = $mtch[3];
3572
3573                         $the_url = Contact::magicLinkById($item['author-id'], $mtch[1]);
3574
3575                         if (strpos($mime, 'video') !== false) {
3576                                 if (!$vhead) {
3577                                         $vhead = true;
3578                                         $a->page['htmlhead'] .= Renderer::replaceMacros(Renderer::getMarkupTemplate('videos_head.tpl'));
3579                                 }
3580
3581                                 $url_parts = explode('/', $the_url);
3582                                 $id = end($url_parts);
3583                                 $as .= Renderer::replaceMacros(Renderer::getMarkupTemplate('video_top.tpl'), [
3584                                         '$video' => [
3585                                                 'id'     => $id,
3586                                                 'title'  => L10n::t('View Video'),
3587                                                 'src'    => $the_url,
3588                                                 'mime'   => $mime,
3589                                         ],
3590                                 ]);
3591                         }
3592
3593                         $filetype = strtolower(substr($mime, 0, strpos($mime, '/')));
3594                         if ($filetype) {
3595                                 $filesubtype = strtolower(substr($mime, strpos($mime, '/') + 1));
3596                                 $filesubtype = str_replace('.', '-', $filesubtype);
3597                         } else {
3598                                 $filetype = 'unkn';
3599                                 $filesubtype = 'unkn';
3600                         }
3601
3602                         $title = Strings::escapeHtml(trim(($mtch[4] ?? '') ?: $mtch[1]));
3603                         $title .= ' ' . $mtch[2] . ' ' . L10n::t('bytes');
3604
3605                         $icon = '<div class="attachtype icon s22 type-' . $filetype . ' subtype-' . $filesubtype . '"></div>';
3606                         $as .= '<a href="' . strip_tags($the_url) . '" title="' . $title . '" class="attachlink" target="_blank" >' . $icon . '</a>';
3607                 }
3608
3609                 if ($as != '') {
3610                         $s .= '<div class="body-attach">'.$as.'<div class="clear"></div></div>';
3611                 }
3612
3613                 // Map.
3614                 if (strpos($s, '<div class="map">') !== false && !empty($item['coord'])) {
3615                         $x = Map::byCoordinates(trim($item['coord']));
3616                         if ($x) {
3617                                 $s = preg_replace('/\<div class\=\"map\"\>/', '$0' . $x, $s);
3618                         }
3619                 }
3620
3621                 // Replace friendica image url size with theme preference.
3622                 if (!empty($a->theme_info['item_image_size'])) {
3623                         $ps = $a->theme_info['item_image_size'];
3624                         $s = preg_replace('|(<img[^>]+src="[^"]+/photo/[0-9a-f]+)-[0-9]|', "$1-" . $ps, $s);
3625                 }
3626
3627                 $s = HTML::applyContentFilter($s, $filter_reasons);
3628
3629                 $hook_data = ['item' => $item, 'html' => $s];
3630                 Hook::callAll('prepare_body_final', $hook_data);
3631
3632                 return $hook_data['html'];
3633         }
3634
3635         /**
3636          * get private link for item
3637          *
3638          * @param array $item
3639          * @return boolean|array False if item has not plink, otherwise array('href'=>plink url, 'title'=>translated title)
3640          * @throws \Exception
3641          */
3642         public static function getPlink($item)
3643         {
3644                 $a = self::getApp();
3645
3646                 if ($a->user['nickname'] != "") {
3647                         $ret = [
3648                                 'href' => "display/" . $item['guid'],
3649                                 'orig' => "display/" . $item['guid'],
3650                                 'title' => L10n::t('View on separate page'),
3651                                 'orig_title' => L10n::t('view on separate page'),
3652                         ];
3653
3654                         if (!empty($item['plink'])) {
3655                                 $ret["href"] = $a->removeBaseURL($item['plink']);
3656                                 $ret["title"] = L10n::t('link to source');
3657                         }
3658
3659                 } elseif (!empty($item['plink']) && ($item['private'] != 1)) {
3660                         $ret = [
3661                                 'href' => $item['plink'],
3662                                 'orig' => $item['plink'],
3663                                 'title' => L10n::t('link to source'),
3664                         ];
3665                 } else {
3666                         $ret = [];
3667                 }
3668
3669                 return $ret;
3670         }
3671
3672         /**
3673          * Is the given item array a post that is sent as starting post to a forum?
3674          *
3675          * @param array $item
3676          * @param array $owner
3677          *
3678          * @return boolean "true" when it is a forum post
3679          */
3680         public static function isForumPost(array $item, array $owner = [])
3681         {
3682                 if (empty($owner)) {
3683                         $owner = User::getOwnerDataById($item['uid']);
3684                         if (empty($owner)) {
3685                                 return false;
3686                         }
3687                 }
3688
3689                 if (($item['author-id'] == $item['owner-id']) ||
3690                         ($owner['id'] == $item['contact-id']) ||
3691                         ($item['uri'] != $item['parent-uri']) ||
3692                         $item['origin']) {
3693                         return false;
3694                 }
3695
3696                 return Contact::isForum($item['contact-id']);
3697         }
3698
3699         /**
3700          * Search item id for given URI or plink
3701          *
3702          * @param string $uri
3703          * @param integer $uid
3704          *
3705          * @return integer item id
3706          */
3707         public static function searchByLink($uri, $uid = 0)
3708         {
3709                 $ssl_uri = str_replace('http://', 'https://', $uri);
3710                 $uris = [$uri, $ssl_uri, Strings::normaliseLink($uri)];
3711
3712                 $item = DBA::selectFirst('item', ['id'], ['uri' => $uris, 'uid' => $uid]);
3713                 if (DBA::isResult($item)) {
3714                         return $item['id'];
3715                 }
3716
3717                 $itemcontent = DBA::selectFirst('item-content', ['uri-id'], ['plink' => $uris]);
3718                 if (!DBA::isResult($itemcontent)) {
3719                         return 0;
3720                 }
3721
3722                 $itemuri = DBA::selectFirst('item-uri', ['uri'], ['id' => $itemcontent['uri-id']]);
3723                 if (!DBA::isResult($itemuri)) {
3724                         return 0;
3725                 }
3726
3727                 $item = DBA::selectFirst('item', ['id'], ['uri' => $itemuri['uri'], 'uid' => $uid]);
3728                 if (DBA::isResult($item)) {
3729                         return $item['id'];
3730                 }
3731
3732                 return 0;
3733         }
3734
3735         /**
3736          * Fetches item for given URI or plink
3737          *
3738          * @param string $uri
3739          * @param integer $uid
3740          *
3741          * @return integer item id
3742          */
3743         public static function fetchByLink($uri, $uid = 0)
3744         {
3745                 $item_id = self::searchByLink($uri, $uid);
3746                 if (!empty($item_id)) {
3747                         return $item_id;
3748                 }
3749
3750                 if (ActivityPub\Processor::fetchMissingActivity($uri)) {
3751                         $item_id = self::searchByLink($uri, $uid);
3752                 } else {
3753                         $item_id = Diaspora::fetchByURL($uri);
3754                 }
3755
3756                 if (!empty($item_id)) {
3757                         return $item_id;
3758                 }
3759
3760                 return 0;
3761         }
3762
3763         /**
3764          * Return share data from an item array (if the item is shared item)
3765          * We are providing the complete Item array, because at some time in the future
3766          * we hopefully will define these values not in the body anymore but in some item fields.
3767          * This function is meant to replace all similar functions in the system.
3768          *
3769          * @param array $item
3770          *
3771          * @return array with share information
3772          */
3773         public static function getShareArray($item)
3774         {
3775                 if (!preg_match("/(.*?)\[share(.*?)\]\s?(.*?)\s?\[\/share\]\s?/ism", $item['body'], $matches)) {
3776                         return [];
3777                 }
3778
3779                 $attribute_string = $matches[2];
3780                 $attributes = ['comment' => trim($matches[1]), 'shared' => trim($matches[3])];
3781                 foreach(['author', 'profile', 'avatar', 'guid', 'posted', 'link'] as $field) {
3782                                 if (preg_match("/$field=(['\"])(.+?)\\1/ism", $attribute_string, $matches)) {
3783                                         $attributes[$field] = trim(html_entity_decode($matches[2] ?? '', ENT_QUOTES, 'UTF-8'));
3784                                 }
3785                 }
3786                 return $attributes;
3787         }
3788
3789         /**
3790          * Fetch item information for shared items from the original items and adds it.
3791          *
3792          * @param array $item
3793          *
3794          * @return array item array with data from the original item
3795          */
3796         public static function addShareDataFromOriginal($item)
3797         {
3798                 $shared = self::getShareArray($item);
3799                 if (empty($shared)) {
3800                         return $item;
3801                 }
3802
3803                 // Real reshares always have got a GUID.
3804                 if (empty($shared['guid'])) {
3805                         return $item;
3806                 }
3807
3808                 $uid = $item['uid'] ?? 0;
3809
3810                 // first try to fetch the item via the GUID. This will work for all reshares that had been created on this system
3811                 $shared_item = self::selectFirst(['title', 'body', 'attach'], ['guid' => $shared['guid'], 'uid' => [0, $uid]]);
3812                 if (!DBA::isResult($shared_item)) {
3813                         // Otherwhise try to find (and possibly fetch) the item via the link. This should work for Diaspora and ActivityPub posts
3814                         $id = self::fetchByLink($shared['link'], $uid);
3815                         if (empty($id)) {
3816                                 return $item;
3817                         }
3818
3819                         $shared_item = self::selectFirst(['title', 'body', 'attach'], ['id' => $id]);
3820                         if (!DBA::isResult($shared_item)) {
3821                                 return $item;
3822                         }
3823                 }
3824                 $item['body'] = preg_replace("/(.*?\[share.*?\]\s?).*?(\s?\[\/share\]\s?)/ism", '$1' . $shared_item['body'] . '$2', $item['body']);
3825                 unset($shared_item['body']);
3826
3827                 return array_merge($item, $shared_item);
3828         }
3829 }