src/Model/Item.php

   1 <?php
   2
   3 /**
   4  * @file src/Model/Item.php
   5  */
   6
   7 namespace Friendica\Model;
   8
   9 use Friendica\Content\Text\BBCode;
  10 use Friendica\Content\Text\HTML;
  11 use Friendica\Core\Config;
  12 use Friendica\Core\Hook;
  13 use Friendica\Core\L10n;
  14 use Friendica\Core\Logger;
  15 use Friendica\Core\Protocol;
  16 use Friendica\Core\Renderer;
  17 use Friendica\Core\Session;
  18 use Friendica\Core\System;
  19 use Friendica\Core\Worker;
  20 use Friendica\Database\DBA;
  21 use Friendica\DI;
  22 use Friendica\Protocol\Activity;
  23 use Friendica\Protocol\ActivityPub;
  24 use Friendica\Protocol\Diaspora;
  25 use Friendica\Protocol\OStatus;
  26 use Friendica\Util\DateTimeFormat;
  27 use Friendica\Util\Map;
  28 use Friendica\Util\Network;
  29 use Friendica\Util\Security;
  30 use Friendica\Util\Strings;
  31 use Friendica\Util\XML;
  32 use Friendica\Worker\Delivery;
  33 use Text_LanguageDetect;
  34
  35 class Item
  36 {
  37         // Posting types, inspired by https://www.w3.org/TR/activitystreams-vocabulary/#object-types
  38         const PT_ARTICLE = 0;
  39         const PT_NOTE = 1;
  40         const PT_PAGE = 2;
  41         const PT_IMAGE = 16;
  42         const PT_AUDIO = 17;
  43         const PT_VIDEO = 18;
  44         const PT_DOCUMENT = 19;
  45         const PT_EVENT = 32;
  46         const PT_PERSONAL_NOTE = 128;
  47
  48         // Field list that is used to display the items
  49         const DISPLAY_FIELDLIST = [
  50                 'uid', 'id', 'parent', 'uri', 'thr-parent', 'parent-uri', 'guid', 'network', 'gravity',
  51                 'commented', 'created', 'edited', 'received', 'verb', 'object-type', 'postopts', 'plink',
  52                 'wall', 'private', 'starred', 'origin', 'title', 'body', 'file', 'attach', 'language',
  53                 'content-warning', 'location', 'coord', 'app', 'rendered-hash', 'rendered-html', 'object',
  54                 'allow_cid', 'allow_gid', 'deny_cid', 'deny_gid', 'item_id',
  55                 'author-id', 'author-link', 'author-name', 'author-avatar', 'author-network',
  56                 'owner-id', 'owner-link', 'owner-name', 'owner-avatar', 'owner-network',
  57                 'contact-id', 'contact-uid', 'contact-link', 'contact-name', 'contact-avatar',
  58                 'writable', 'self', 'cid', 'alias', 'pinned',
  59                 'event-id', 'event-created', 'event-edited', 'event-start', 'event-finish',
  60                 'event-summary', 'event-desc', 'event-location', 'event-type',
  61                 'event-nofinish', 'event-adjust', 'event-ignore', 'event-id',
  62                 'delivery_queue_count', 'delivery_queue_done', 'delivery_queue_failed'
  63         ];
  64
  65         // Field list that is used to deliver items via the protocols
  66         const DELIVER_FIELDLIST = ['uid', 'id', 'parent', 'uri', 'thr-parent', 'parent-uri', 'guid',
  67                         'parent-guid', 'created', 'edited', 'verb', 'object-type', 'object', 'target',
  68                         'private', 'title', 'body', 'location', 'coord', 'app',
  69                         'attach', 'tag', 'deleted', 'extid', 'post-type',
  70                         'allow_cid', 'allow_gid', 'deny_cid', 'deny_gid',
  71                         'author-id', 'author-link', 'owner-link', 'contact-uid',
  72                         'signed_text', 'signature', 'signer', 'network'];
  73
  74         // Field list for "item-content" table that is mixed with the item table
  75         const MIXED_CONTENT_FIELDLIST = ['title', 'content-warning', 'body', 'location',
  76                         'coord', 'app', 'rendered-hash', 'rendered-html', 'verb',
  77                         'object-type', 'object', 'target-type', 'target', 'plink'];
  78
  79         // Field list for "item-content" table that is not present in the "item" table
  80         const CONTENT_FIELDLIST = ['language'];
  81
  82         // All fields in the item table
  83         const ITEM_FIELDLIST = ['id', 'uid', 'parent', 'uri', 'parent-uri', 'thr-parent', 'guid',
  84                         'contact-id', 'type', 'wall', 'gravity', 'extid', 'icid', 'iaid', 'psid',
  85                         'created', 'edited', 'commented', 'received', 'changed', 'verb',
  86                         'postopts', 'plink', 'resource-id', 'event-id', 'tag', 'attach', 'inform',
  87                         'file', 'allow_cid', 'allow_gid', 'deny_cid', 'deny_gid', 'post-type',
  88                         'private', 'pubmail', 'moderated', 'visible', 'starred', 'bookmark',
  89                         'unseen', 'deleted', 'origin', 'forum_mode', 'mention', 'global', 'network',
  90                         'title', 'content-warning', 'body', 'location', 'coord', 'app',
  91                         'rendered-hash', 'rendered-html', 'object-type', 'object', 'target-type', 'target',
  92                         'author-id', 'author-link', 'author-name', 'author-avatar', 'author-network',
  93                         'owner-id', 'owner-link', 'owner-name', 'owner-avatar'];
  94
  95         // Never reorder or remove entries from this list. Just add new ones at the end, if needed.
  96         // The item-activity table only stores the index and needs this array to know the matching activity.
  97         const ACTIVITIES = [
  98                 Activity::LIKE, Activity::DISLIKE,
  99                 Activity::ATTEND, Activity::ATTENDNO, Activity::ATTENDMAYBE,
 100                 Activity::FOLLOW,
 101                 Activity::ANNOUNCE];
 102
 103         private static $legacy_mode = null;
 104
 105         public static function isLegacyMode()
 106         {
 107                 if (is_null(self::$legacy_mode)) {
 108                         self::$legacy_mode = (Config::get("system", "post_update_version") < 1279);
 109                 }
 110
 111                 return self::$legacy_mode;
 112         }
 113
 114         /**
 115          * Set the pinned state of an item
 116          *
 117          * @param integer $iid    Item ID
 118          * @param integer $uid    User ID
 119          * @param boolean $pinned Pinned state
 120          */
 121         public static function setPinned(int $iid, int $uid, bool $pinned)
 122         {
 123                 DBA::update('user-item', ['pinned' => $pinned], ['iid' => $iid, 'uid' => $uid], true);
 124         }
 125
 126         /**
 127          * Get the pinned state
 128          *
 129          * @param integer $iid Item ID
 130          * @param integer $uid User ID
 131          *
 132          * @return boolean pinned state
 133          */
 134         public static function getPinned(int $iid, int $uid)
 135         {
 136                 $useritem = DBA::selectFirst('user-item', ['pinned'], ['iid' => $iid, 'uid' => $uid]);
 137                 if (!DBA::isResult($useritem)) {
 138                         return false;
 139                 }
 140                 return (bool)$useritem['pinned'];
 141         }
 142
 143         /**
 144          * Select pinned rows from the item table for a given user
 145          *
 146          * @param integer $uid       User ID
 147          * @param array   $selected  Array of selected fields, empty for all
 148          * @param array   $condition Array of fields for condition
 149          * @param array   $params    Array of several parameters
 150          *
 151          * @return boolean|object
 152          * @throws \Exception
 153          */
 154         public static function selectPinned(int $uid, array $selected = [], array $condition = [], $params = [])
 155         {
 156                 $useritems = DBA::select('user-item', ['iid'], ['uid' => $uid, 'pinned' => true]);
 157                 if (!DBA::isResult($useritems)) {
 158                         return $useritems;
 159                 }
 160
 161                 $pinned = [];
 162                 while ($useritem = self::fetch($useritems)) {
 163                         $pinned[] = $useritem['iid'];
 164                 }
 165                 DBA::close($useritems);
 166
 167                 if (empty($pinned)) {
 168                         return [];
 169                 }
 170
 171                 if (empty($condition) || !is_array($condition)) {
 172                         $condition = ['iid' => $pinned];
 173                 } else {
 174                         reset($condition);
 175                         $first_key = key($condition);
 176                         if (!is_int($first_key)) {
 177                                 $condition['iid'] = $pinned;
 178                         } else {
 179                                 $values_string = substr(str_repeat("?, ", count($pinned)), 0, -2);
 180                                 $condition[0] = '(' . $condition[0] . ") AND `iid` IN (" . $values_string . ")";
 181                                 $condition = array_merge($condition, $pinned);
 182                         }
 183                 }
 184
 185                 return self::selectThreadForUser($uid, $selected, $condition, $params);
 186         }
 187
 188         /**
 189          * returns an activity index from an activity string
 190          *
 191          * @param string $activity activity string
 192          * @return integer Activity index
 193          */
 194         public static function activityToIndex($activity)
 195         {
 196                 $index = array_search($activity, self::ACTIVITIES);
 197
 198                 if (is_bool($index)) {
 199                         $index = -1;
 200                 }
 201
 202                 return $index;
 203         }
 204
 205         /**
 206          * returns an activity string from an activity index
 207          *
 208          * @param integer $index activity index
 209          * @return string Activity string
 210          */
 211         private static function indexToActivity($index)
 212         {
 213                 if (is_null($index) || !array_key_exists($index, self::ACTIVITIES)) {
 214                         return '';
 215                 }
 216
 217                 return self::ACTIVITIES[$index];
 218         }
 219
 220         /**
 221          * Fetch a single item row
 222          *
 223          * @param mixed $stmt statement object
 224          * @return array current row
 225          */
 226         public static function fetch($stmt)
 227         {
 228                 $row = DBA::fetch($stmt);
 229
 230                 if (is_bool($row)) {
 231                         return $row;
 232                 }
 233
 234                 // ---------------------- Transform item structure data ----------------------
 235
 236                 // We prefer the data from the user's contact over the public one
 237                 if (!empty($row['author-link']) && !empty($row['contact-link']) &&
 238                         ($row['author-link'] == $row['contact-link'])) {
 239                         if (isset($row['author-avatar']) && !empty($row['contact-avatar'])) {
 240                                 $row['author-avatar'] = $row['contact-avatar'];
 241                         }
 242                         if (isset($row['author-name']) && !empty($row['contact-name'])) {
 243                                 $row['author-name'] = $row['contact-name'];
 244                         }
 245                 }
 246
 247                 if (!empty($row['owner-link']) && !empty($row['contact-link']) &&
 248                         ($row['owner-link'] == $row['contact-link'])) {
 249                         if (isset($row['owner-avatar']) && !empty($row['contact-avatar'])) {
 250                                 $row['owner-avatar'] = $row['contact-avatar'];
 251                         }
 252                         if (isset($row['owner-name']) && !empty($row['contact-name'])) {
 253                                 $row['owner-name'] = $row['contact-name'];
 254                         }
 255                 }
 256
 257                 // We can always comment on posts from these networks
 258                 if (array_key_exists('writable', $row) &&
 259                         in_array($row['internal-network'], Protocol::FEDERATED)) {
 260                         $row['writable'] = true;
 261                 }
 262
 263                 // ---------------------- Transform item content data ----------------------
 264
 265                 // Fetch data from the item-content table whenever there is content there
 266                 if (self::isLegacyMode()) {
 267                         $legacy_fields = array_merge(ItemDeliveryData::LEGACY_FIELD_LIST, self::MIXED_CONTENT_FIELDLIST);
 268                         foreach ($legacy_fields as $field) {
 269                                 if (empty($row[$field]) && !empty($row['internal-item-' . $field])) {
 270                                         $row[$field] = $row['internal-item-' . $field];
 271                                 }
 272                                 unset($row['internal-item-' . $field]);
 273                         }
 274                 }
 275
 276                 if (!empty($row['internal-iaid']) && array_key_exists('verb', $row)) {
 277                         $row['verb'] = self::indexToActivity($row['internal-activity']);
 278                         if (array_key_exists('title', $row)) {
 279                                 $row['title'] = '';
 280                         }
 281                         if (array_key_exists('body', $row)) {
 282                                 $row['body'] = $row['verb'];
 283                         }
 284                         if (array_key_exists('object', $row)) {
 285                                 $row['object'] = '';
 286                         }
 287                         if (array_key_exists('object-type', $row)) {
 288                                 $row['object-type'] = Activity\ObjectType::NOTE;
 289                         }
 290                 } elseif (array_key_exists('verb', $row) && in_array($row['verb'], ['', Activity::POST, Activity::SHARE])) {
 291                         // Posts don't have a target - but having tags or files.
 292                         // We safe some performance by building tag and file strings only here.
 293                         // We remove the target since they aren't used for this type.
 294                         // In mail posts we do store some mail header data in the object.
 295                         if (array_key_exists('target', $row)) {
 296                                 $row['target'] = '';
 297                         }
 298                 }
 299
 300                 if (!array_key_exists('verb', $row) || in_array($row['verb'], ['', Activity::POST, Activity::SHARE])) {
 301                         // Build the tag string out of the term entries
 302                         if (array_key_exists('tag', $row) && empty($row['tag'])) {
 303                                 $row['tag'] = Term::tagTextFromItemId($row['internal-iid']);
 304                         }
 305
 306                         // Build the file string out of the term entries
 307                         if (array_key_exists('file', $row) && empty($row['file'])) {
 308                                 $row['file'] = Term::fileTextFromItemId($row['internal-iid']);
 309                         }
 310                 }
 311
 312                 if (array_key_exists('signed_text', $row) && array_key_exists('interaction', $row) && !is_null($row['interaction'])) {
 313                         $row['signed_text'] = $row['interaction'];
 314                 }
 315
 316                 if (array_key_exists('ignored', $row) && array_key_exists('internal-user-ignored', $row) && !is_null($row['internal-user-ignored'])) {
 317                         $row['ignored'] = $row['internal-user-ignored'];
 318                 }
 319
 320                 // Remove internal fields
 321                 unset($row['internal-activity']);
 322                 unset($row['internal-network']);
 323                 unset($row['internal-iid']);
 324                 unset($row['internal-iaid']);
 325                 unset($row['internal-icid']);
 326                 unset($row['internal-user-ignored']);
 327                 unset($row['interaction']);
 328
 329                 return $row;
 330         }
 331
 332         /**
 333          * Fills an array with data from an item query
 334          *
 335          * @param object $stmt statement object
 336          * @param bool   $do_close
 337          * @return array Data array
 338          */
 339         public static function inArray($stmt, $do_close = true) {
 340                 if (is_bool($stmt)) {
 341                         return $stmt;
 342                 }
 343
 344                 $data = [];
 345                 while ($row = self::fetch($stmt)) {
 346                         $data[] = $row;
 347                 }
 348                 if ($do_close) {
 349                         DBA::close($stmt);
 350                 }
 351                 return $data;
 352         }
 353
 354         /**
 355          * Check if item data exists
 356          *
 357          * @param array $condition array of fields for condition
 358          *
 359          * @return boolean Are there rows for that condition?
 360          * @throws \Exception
 361          */
 362         public static function exists($condition) {
 363                 $stmt = self::select(['id'], $condition, ['limit' => 1]);
 364
 365                 if (is_bool($stmt)) {
 366                         $retval = $stmt;
 367                 } else {
 368                         $retval = (DBA::numRows($stmt) > 0);
 369                 }
 370
 371                 DBA::close($stmt);
 372
 373                 return $retval;
 374         }
 375
 376         /**
 377          * Retrieve a single record from the item table for a given user and returns it in an associative array
 378          *
 379          * @param integer $uid User ID
 380          * @param array   $selected
 381          * @param array   $condition
 382          * @param array   $params
 383          * @return bool|array
 384          * @throws \Exception
 385          * @see   DBA::select
 386          */
 387         public static function selectFirstForUser($uid, array $selected = [], array $condition = [], $params = [])
 388         {
 389                 $params['uid'] = $uid;
 390
 391                 if (empty($selected)) {
 392                         $selected = Item::DISPLAY_FIELDLIST;
 393                 }
 394
 395                 return self::selectFirst($selected, $condition, $params);
 396         }
 397
 398         /**
 399          * Select rows from the item table for a given user
 400          *
 401          * @param integer $uid       User ID
 402          * @param array   $selected  Array of selected fields, empty for all
 403          * @param array   $condition Array of fields for condition
 404          * @param array   $params    Array of several parameters
 405          *
 406          * @return boolean|object
 407          * @throws \Exception
 408          */
 409         public static function selectForUser($uid, array $selected = [], array $condition = [], $params = [])
 410         {
 411                 $params['uid'] = $uid;
 412
 413                 if (empty($selected)) {
 414                         $selected = Item::DISPLAY_FIELDLIST;
 415                 }
 416
 417                 return self::select($selected, $condition, $params);
 418         }
 419
 420         /**
 421          * Retrieve a single record from the item table and returns it in an associative array
 422          *
 423          * @param array $fields
 424          * @param array $condition
 425          * @param array $params
 426          * @return bool|array
 427          * @throws \Exception
 428          * @see   DBA::select
 429          */
 430         public static function selectFirst(array $fields = [], array $condition = [], $params = [])
 431         {
 432                 $params['limit'] = 1;
 433
 434                 $result = self::select($fields, $condition, $params);
 435
 436                 if (is_bool($result)) {
 437                         return $result;
 438                 } else {
 439                         $row = self::fetch($result);
 440                         DBA::close($result);
 441                         return $row;
 442                 }
 443         }
 444
 445         /**
 446          * Select rows from the item table and returns them as an array
 447          *
 448          * @param array $selected  Array of selected fields, empty for all
 449          * @param array $condition Array of fields for condition
 450          * @param array $params    Array of several parameters
 451          *
 452          * @return array
 453          * @throws \Exception
 454          */
 455         public static function selectToArray(array $fields = [], array $condition = [], $params = [])
 456         {
 457                 $result = self::select($fields, $condition, $params);
 458
 459                 if (is_bool($result)) {
 460                         return [];
 461                 }
 462
 463                 $data = [];
 464                 while ($row = self::fetch($result)) {
 465                         $data[] = $row;
 466                 }
 467                 DBA::close($result);
 468
 469                 return $data;
 470         }
 471
 472         /**
 473          * Select rows from the item table
 474          *
 475          * @param array $selected  Array of selected fields, empty for all
 476          * @param array $condition Array of fields for condition
 477          * @param array $params    Array of several parameters
 478          *
 479          * @return boolean|object
 480          * @throws \Exception
 481          */
 482         public static function select(array $selected = [], array $condition = [], $params = [])
 483         {
 484                 $uid = 0;
 485                 $usermode = false;
 486
 487                 if (isset($params['uid'])) {
 488                         $uid = $params['uid'];
 489                         $usermode = true;
 490                 }
 491
 492                 $fields = self::fieldlist($usermode);
 493
 494                 $select_fields = self::constructSelectFields($fields, $selected);
 495
 496                 $condition_string = DBA::buildCondition($condition);
 497
 498                 $condition_string = self::addTablesToFields($condition_string, $fields);
 499
 500                 if ($usermode) {
 501                         $condition_string = $condition_string . ' AND ' . self::condition(false);
 502                 }
 503
 504                 $param_string = self::addTablesToFields(DBA::buildParameter($params), $fields);
 505
 506                 $table = "`item` " . self::constructJoins($uid, $select_fields . $condition_string . $param_string, false, $usermode);
 507
 508                 $sql = "SELECT " . $select_fields . " FROM " . $table . $condition_string . $param_string;
 509
 510                 return DBA::p($sql, $condition);
 511         }
 512
 513         /**
 514          * Select rows from the starting post in the item table
 515          *
 516          * @param integer $uid       User ID
 517          * @param array   $selected
 518          * @param array   $condition Array of fields for condition
 519          * @param array   $params    Array of several parameters
 520          *
 521          * @return boolean|object
 522          * @throws \Exception
 523          */
 524         public static function selectThreadForUser($uid, array $selected = [], array $condition = [], $params = [])
 525         {
 526                 $params['uid'] = $uid;
 527
 528                 if (empty($selected)) {
 529                         $selected = Item::DISPLAY_FIELDLIST;
 530                 }
 531
 532                 return self::selectThread($selected, $condition, $params);
 533         }
 534
 535         /**
 536          * Retrieve a single record from the starting post in the item table and returns it in an associative array
 537          *
 538          * @param integer $uid User ID
 539          * @param array   $selected
 540          * @param array   $condition
 541          * @param array   $params
 542          * @return bool|array
 543          * @throws \Exception
 544          * @see   DBA::select
 545          */
 546         public static function selectFirstThreadForUser($uid, array $selected = [], array $condition = [], $params = [])
 547         {
 548                 $params['uid'] = $uid;
 549
 550                 if (empty($selected)) {
 551                         $selected = Item::DISPLAY_FIELDLIST;
 552                 }
 553
 554                 return self::selectFirstThread($selected, $condition, $params);
 555         }
 556
 557         /**
 558          * Retrieve a single record from the starting post in the item table and returns it in an associative array
 559          *
 560          * @param array $fields
 561          * @param array $condition
 562          * @param array $params
 563          * @return bool|array
 564          * @throws \Exception
 565          * @see   DBA::select
 566          */
 567         public static function selectFirstThread(array $fields = [], array $condition = [], $params = [])
 568         {
 569                 $params['limit'] = 1;
 570                 $result = self::selectThread($fields, $condition, $params);
 571
 572                 if (is_bool($result)) {
 573                         return $result;
 574                 } else {
 575                         $row = self::fetch($result);
 576                         DBA::close($result);
 577                         return $row;
 578                 }
 579         }
 580
 581         /**
 582          * Select rows from the starting post in the item table
 583          *
 584          * @param array $selected  Array of selected fields, empty for all
 585          * @param array $condition Array of fields for condition
 586          * @param array $params    Array of several parameters
 587          *
 588          * @return boolean|object
 589          * @throws \Exception
 590          */
 591         public static function selectThread(array $selected = [], array $condition = [], $params = [])
 592         {
 593                 $uid = 0;
 594                 $usermode = false;
 595
 596                 if (isset($params['uid'])) {
 597                         $uid = $params['uid'];
 598                         $usermode = true;
 599                 }
 600
 601                 $fields = self::fieldlist($usermode);
 602
 603                 $fields['thread'] = ['mention', 'ignored', 'iid'];
 604
 605                 $threadfields = ['thread' => ['iid', 'uid', 'contact-id', 'owner-id', 'author-id',
 606                         'created', 'edited', 'commented', 'received', 'changed', 'wall', 'private',
 607                         'pubmail', 'moderated', 'visible', 'starred', 'ignored', 'post-type',
 608                         'unseen', 'deleted', 'origin', 'forum_mode', 'mention', 'network']];
 609
 610                 $select_fields = self::constructSelectFields($fields, $selected);
 611
 612                 $condition_string = DBA::buildCondition($condition);
 613
 614                 $condition_string = self::addTablesToFields($condition_string, $threadfields);
 615                 $condition_string = self::addTablesToFields($condition_string, $fields);
 616
 617                 if ($usermode) {
 618                         $condition_string = $condition_string . ' AND ' . self::condition(true);
 619                 }
 620
 621                 $param_string = DBA::buildParameter($params);
 622                 $param_string = self::addTablesToFields($param_string, $threadfields);
 623                 $param_string = self::addTablesToFields($param_string, $fields);
 624
 625                 $table = "`thread` " . self::constructJoins($uid, $select_fields . $condition_string . $param_string, true, $usermode);
 626
 627                 $sql = "SELECT " . $select_fields . " FROM " . $table . $condition_string . $param_string;
 628
 629                 return DBA::p($sql, $condition);
 630         }
 631
 632         /**
 633          * Returns a list of fields that are associated with the item table
 634          *
 635          * @param $usermode
 636          * @return array field list
 637          */
 638         private static function fieldlist($usermode)
 639         {
 640                 $fields = [];
 641
 642                 $fields['item'] = ['id', 'uid', 'parent', 'uri', 'parent-uri', 'thr-parent', 'guid',
 643                         'contact-id', 'owner-id', 'author-id', 'type', 'wall', 'gravity', 'extid',
 644                         'created', 'edited', 'commented', 'received', 'changed', 'psid',
 645                         'resource-id', 'event-id', 'tag', 'attach', 'post-type', 'file',
 646                         'private', 'pubmail', 'moderated', 'visible', 'starred', 'bookmark',
 647                         'unseen', 'deleted', 'origin', 'forum_mode', 'mention', 'global',
 648                         'id' => 'item_id', 'network', 'icid', 'iaid', 'id' => 'internal-iid',
 649                         'network' => 'internal-network', 'icid' => 'internal-icid',
 650                         'iaid' => 'internal-iaid'];
 651
 652                 if ($usermode) {
 653                         $fields['user-item'] = ['pinned', 'notification-type', 'ignored' => 'internal-user-ignored'];
 654                 }
 655
 656                 $fields['item-activity'] = ['activity', 'activity' => 'internal-activity'];
 657
 658                 $fields['item-content'] = array_merge(self::CONTENT_FIELDLIST, self::MIXED_CONTENT_FIELDLIST);
 659
 660                 $fields['item-delivery-data'] = array_merge(ItemDeliveryData::LEGACY_FIELD_LIST, ItemDeliveryData::FIELD_LIST);
 661
 662                 $fields['permissionset'] = ['allow_cid', 'allow_gid', 'deny_cid', 'deny_gid'];
 663
 664                 $fields['author'] = ['url' => 'author-link', 'name' => 'author-name', 'addr' => 'author-addr',
 665                         'thumb' => 'author-avatar', 'nick' => 'author-nick', 'network' => 'author-network'];
 666
 667                 $fields['owner'] = ['url' => 'owner-link', 'name' => 'owner-name', 'addr' => 'owner-addr',
 668                         'thumb' => 'owner-avatar', 'nick' => 'owner-nick', 'network' => 'owner-network'];
 669
 670                 $fields['contact'] = ['url' => 'contact-link', 'name' => 'contact-name', 'thumb' => 'contact-avatar',
 671                         'writable', 'self', 'id' => 'cid', 'alias', 'uid' => 'contact-uid',
 672                         'photo', 'name-date', 'uri-date', 'avatar-date', 'thumb', 'dfrn-id'];
 673
 674                 $fields['parent-item'] = ['guid' => 'parent-guid', 'network' => 'parent-network'];
 675
 676                 $fields['parent-item-author'] = ['url' => 'parent-author-link', 'name' => 'parent-author-name'];
 677
 678                 $fields['event'] = ['created' => 'event-created', 'edited' => 'event-edited',
 679                         'start' => 'event-start','finish' => 'event-finish',
 680                         'summary' => 'event-summary','desc' => 'event-desc',
 681                         'location' => 'event-location', 'type' => 'event-type',
 682                         'nofinish' => 'event-nofinish','adjust' => 'event-adjust',
 683                         'ignore' => 'event-ignore', 'id' => 'event-id'];
 684
 685                 $fields['sign'] = ['signed_text', 'signature', 'signer'];
 686
 687                 $fields['diaspora-interaction'] = ['interaction'];
 688
 689                 return $fields;
 690         }
 691
 692         /**
 693          * Returns SQL condition for the "select" functions
 694          *
 695          * @param boolean $thread_mode Called for the items (false) or for the threads (true)
 696          *
 697          * @return string SQL condition
 698          */
 699         private static function condition($thread_mode)
 700         {
 701                 if ($thread_mode) {
 702                         $master_table = "`thread`";
 703                 } else {
 704                         $master_table = "`item`";
 705                 }
 706                 return sprintf("$master_table.`visible` AND NOT $master_table.`deleted` AND NOT $master_table.`moderated`
 707                         AND (`user-item`.`hidden` IS NULL OR NOT `user-item`.`hidden`)
 708                         AND (`user-author`.`blocked` IS NULL OR NOT `user-author`.`blocked`)
 709                         AND (`user-author`.`ignored` IS NULL OR NOT `user-author`.`ignored` OR `item`.`gravity` != %d)
 710                         AND (`user-owner`.`blocked` IS NULL OR NOT `user-owner`.`blocked`)
 711                         AND (`user-owner`.`ignored` IS NULL OR NOT `user-owner`.`ignored` OR `item`.`gravity` != %d) ",
 712                         GRAVITY_PARENT, GRAVITY_PARENT);
 713         }
 714
 715         /**
 716          * Returns all needed "JOIN" commands for the "select" functions
 717          *
 718          * @param integer $uid          User ID
 719          * @param string  $sql_commands The parts of the built SQL commands in the "select" functions
 720          * @param boolean $thread_mode  Called for the items (false) or for the threads (true)
 721          *
 722          * @param         $user_mode
 723          * @return string The SQL joins for the "select" functions
 724          */
 725         private static function constructJoins($uid, $sql_commands, $thread_mode, $user_mode)
 726         {
 727                 if ($thread_mode) {
 728                         $master_table = "`thread`";
 729                         $master_table_key = "`thread`.`iid`";
 730                         $joins = "STRAIGHT_JOIN `item` ON `item`.`id` = `thread`.`iid` ";
 731                 } else {
 732                         $master_table = "`item`";
 733                         $master_table_key = "`item`.`id`";
 734                         $joins = '';
 735                 }
 736
 737                 if ($user_mode) {
 738                         $joins .= sprintf("STRAIGHT_JOIN `contact` ON `contact`.`id` = $master_table.`contact-id`
 739                                 AND NOT `contact`.`blocked`
 740                                 AND ((NOT `contact`.`readonly` AND NOT `contact`.`pending` AND (`contact`.`rel` IN (%s, %s)))
 741                                 OR `contact`.`self` OR `item`.`gravity` != %d OR `contact`.`uid` = 0)
 742                                 STRAIGHT_JOIN `contact` AS `author` ON `author`.`id` = $master_table.`author-id` AND NOT `author`.`blocked`
 743                                 STRAIGHT_JOIN `contact` AS `owner` ON `owner`.`id` = $master_table.`owner-id` AND NOT `owner`.`blocked`
 744                                 LEFT JOIN `user-item` ON `user-item`.`iid` = $master_table_key AND `user-item`.`uid` = %d
 745                                 LEFT JOIN `user-contact` AS `user-author` ON `user-author`.`cid` = $master_table.`author-id` AND `user-author`.`uid` = %d
 746                                 LEFT JOIN `user-contact` AS `user-owner` ON `user-owner`.`cid` = $master_table.`owner-id` AND `user-owner`.`uid` = %d",
 747                                 Contact::SHARING, Contact::FRIEND, GRAVITY_PARENT, intval($uid), intval($uid), intval($uid));
 748                 } else {
 749                         if (strpos($sql_commands, "`contact`.") !== false) {
 750                                 $joins .= "LEFT JOIN `contact` ON `contact`.`id` = $master_table.`contact-id`";
 751                         }
 752                         if (strpos($sql_commands, "`author`.") !== false) {
 753                                 $joins .= " LEFT JOIN `contact` AS `author` ON `author`.`id` = $master_table.`author-id`";
 754                         }
 755                         if (strpos($sql_commands, "`owner`.") !== false) {
 756                                 $joins .= " LEFT JOIN `contact` AS `owner` ON `owner`.`id` = $master_table.`owner-id`";
 757                         }
 758                 }
 759
 760                 if (strpos($sql_commands, "`group_member`.") !== false) {
 761                         $joins .= " STRAIGHT_JOIN `group_member` ON `group_member`.`contact-id` = $master_table.`contact-id`";
 762                 }
 763
 764                 if (strpos($sql_commands, "`user`.") !== false) {
 765                         $joins .= " STRAIGHT_JOIN `user` ON `user`.`uid` = $master_table.`uid`";
 766                 }
 767
 768                 if (strpos($sql_commands, "`event`.") !== false) {
 769                         $joins .= " LEFT JOIN `event` ON `event-id` = `event`.`id`";
 770                 }
 771
 772                 if (strpos($sql_commands, "`sign`.") !== false) {
 773                         $joins .= " LEFT JOIN `sign` ON `sign`.`iid` = `item`.`id`";
 774                 }
 775
 776                 if (strpos($sql_commands, "`diaspora-interaction`.") !== false) {
 777                         $joins .= " LEFT JOIN `diaspora-interaction` ON `diaspora-interaction`.`uri-id` = `item`.`uri-id`";
 778                 }
 779
 780                 if (strpos($sql_commands, "`item-activity`.") !== false) {
 781                         $joins .= " LEFT JOIN `item-activity` ON `item-activity`.`uri-id` = `item`.`uri-id`";
 782                 }
 783
 784                 if (strpos($sql_commands, "`item-content`.") !== false) {
 785                         $joins .= " LEFT JOIN `item-content` ON `item-content`.`uri-id` = `item`.`uri-id`";
 786                 }
 787
 788                 if (strpos($sql_commands, "`item-delivery-data`.") !== false) {
 789                         $joins .= " LEFT JOIN `item-delivery-data` ON `item-delivery-data`.`iid` = `item`.`id`";
 790                 }
 791
 792                 if (strpos($sql_commands, "`permissionset`.") !== false) {
 793                         $joins .= " LEFT JOIN `permissionset` ON `permissionset`.`id` = `item`.`psid`";
 794                 }
 795
 796                 if ((strpos($sql_commands, "`parent-item`.") !== false) || (strpos($sql_commands, "`parent-author`.") !== false)) {
 797                         $joins .= " STRAIGHT_JOIN `item` AS `parent-item` ON `parent-item`.`id` = `item`.`parent`";
 798                 }
 799
 800                 if (strpos($sql_commands, "`parent-item-author`.") !== false) {
 801                         $joins .= " STRAIGHT_JOIN `contact` AS `parent-item-author` ON `parent-item-author`.`id` = `parent-item`.`author-id`";
 802                 }
 803
 804                 return $joins;
 805         }
 806
 807         /**
 808          * Add the field list for the "select" functions
 809          *
 810          * @param array $fields The field definition array
 811          * @param array $selected The array with the selected fields from the "select" functions
 812          *
 813          * @return string The field list
 814          */
 815         private static function constructSelectFields($fields, $selected)
 816         {
 817                 if (!empty($selected)) {
 818                         $selected[] = 'internal-iid';
 819                         $selected[] = 'internal-iaid';
 820                         $selected[] = 'internal-icid';
 821                         $selected[] = 'internal-network';
 822                 }
 823
 824                 if (in_array('verb', $selected)) {
 825                         $selected[] = 'internal-activity';
 826                 }
 827
 828                 if (in_array('ignored', $selected)) {
 829                         $selected[] = 'internal-user-ignored';
 830                 }
 831
 832                 if (in_array('signed_text', $selected)) {
 833                         $selected[] = 'interaction';
 834                 }
 835
 836                 $legacy_fields = array_merge(ItemDeliveryData::LEGACY_FIELD_LIST, self::MIXED_CONTENT_FIELDLIST);
 837
 838                 $selection = [];
 839                 foreach ($fields as $table => $table_fields) {
 840                         foreach ($table_fields as $field => $select) {
 841                                 if (empty($selected) || in_array($select, $selected)) {
 842                                         if (self::isLegacyMode() && in_array($select, $legacy_fields)) {
 843                                                 $selection[] = "`item`.`".$select."` AS `internal-item-" . $select . "`";
 844                                         }
 845                                         if (is_int($field)) {
 846                                                 $selection[] = "`" . $table . "`.`" . $select . "`";
 847                                         } else {
 848                                                 $selection[] = "`" . $table . "`.`" . $field . "` AS `" . $select . "`";
 849                                         }
 850                                 }
 851                         }
 852                 }
 853                 return implode(", ", $selection);
 854         }
 855
 856         /**
 857          * add table definition to fields in an SQL query
 858          *
 859          * @param string $query SQL query
 860          * @param array $fields The field definition array
 861          *
 862          * @return string the changed SQL query
 863          */
 864         private static function addTablesToFields($query, $fields)
 865         {
 866                 foreach ($fields as $table => $table_fields) {
 867                         foreach ($table_fields as $alias => $field) {
 868                                 if (is_int($alias)) {
 869                                         $replace_field = $field;
 870                                 } else {
 871                                         $replace_field = $alias;
 872                                 }
 873
 874                                 $search = "/([^\.])`" . $field . "`/i";
 875                                 $replace = "$1`" . $table . "`.`" . $replace_field . "`";
 876                                 $query = preg_replace($search, $replace, $query);
 877                         }
 878                 }
 879                 return $query;
 880         }
 881
 882         /**
 883          * Update existing item entries
 884          *
 885          * @param array $fields    The fields that are to be changed
 886          * @param array $condition The condition for finding the item entries
 887          *
 888          * In the future we may have to change permissions as well.
 889          * Then we had to add the user id as third parameter.
 890          *
 891          * A return value of "0" doesn't mean an error - but that 0 rows had been changed.
 892          *
 893          * @return integer|boolean number of affected rows - or "false" if there was an error
 894          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 895          */
 896         public static function update(array $fields, array $condition)
 897         {
 898                 if (empty($condition) || empty($fields)) {
 899                         return false;
 900                 }
 901
 902                 // To ensure the data integrity we do it in an transaction
 903                 DBA::transaction();
 904
 905                 // We cannot simply expand the condition to check for origin entries
 906                 // The condition needn't to be a simple array but could be a complex condition.
 907                 // And we have to execute this query before the update to ensure to fetch the same data.
 908                 $items = DBA::select('item', ['id', 'origin', 'uri', 'uri-id', 'iaid', 'icid', 'tag', 'file'], $condition);
 909
 910                 $content_fields = [];
 911                 foreach (array_merge(self::CONTENT_FIELDLIST, self::MIXED_CONTENT_FIELDLIST) as $field) {
 912                         if (isset($fields[$field])) {
 913                                 $content_fields[$field] = $fields[$field];
 914                                 if (in_array($field, self::CONTENT_FIELDLIST) || !self::isLegacyMode()) {
 915                                         unset($fields[$field]);
 916                                 } else {
 917                                         $fields[$field] = null;
 918                                 }
 919                         }
 920                 }
 921
 922                 $delivery_data = ItemDeliveryData::extractFields($fields);
 923
 924                 $clear_fields = ['bookmark', 'type', 'author-name', 'author-avatar', 'author-link', 'owner-name', 'owner-avatar', 'owner-link', 'postopts', 'inform'];
 925                 foreach ($clear_fields as $field) {
 926                         if (array_key_exists($field, $fields)) {
 927                                 $fields[$field] = null;
 928                         }
 929                 }
 930
 931                 if (array_key_exists('tag', $fields)) {
 932                         $tags = $fields['tag'];
 933                         $fields['tag'] = null;
 934                 } else {
 935                         $tags = null;
 936                 }
 937
 938                 if (array_key_exists('file', $fields)) {
 939                         $files = $fields['file'];
 940                         $fields['file'] = null;
 941                 } else {
 942                         $files = null;
 943                 }
 944
 945                 if (!empty($fields)) {
 946                         $success = DBA::update('item', $fields, $condition);
 947
 948                         if (!$success) {
 949                                 DBA::close($items);
 950                                 DBA::rollback();
 951                                 return false;
 952                         }
 953                 }
 954
 955                 // When there is no content for the "old" item table, this will count the fetched items
 956                 $rows = DBA::affectedRows();
 957
 958                 $notify_items = [];
 959
 960                 while ($item = DBA::fetch($items)) {
 961                         if (!empty($item['iaid']) || (!empty($content_fields['verb']) && (self::activityToIndex($content_fields['verb']) >= 0))) {
 962                                 self::updateActivity($content_fields, ['uri-id' => $item['uri-id']]);
 963
 964                                 if (empty($item['iaid'])) {
 965                                         $item_activity = DBA::selectFirst('item-activity', ['id'], ['uri-id' => $item['uri-id']]);
 966                                         if (DBA::isResult($item_activity)) {
 967                                                 $item_fields = ['iaid' => $item_activity['id'], 'icid' => null];
 968                                                 foreach (self::MIXED_CONTENT_FIELDLIST as $field) {
 969                                                         if (self::isLegacyMode()) {
 970                                                                 $item_fields[$field] = null;
 971                                                         } else {
 972                                                                 unset($item_fields[$field]);
 973                                                         }
 974                                                 }
 975                                                 DBA::update('item', $item_fields, ['id' => $item['id']]);
 976
 977                                                 if (!empty($item['icid']) && !DBA::exists('item', ['icid' => $item['icid']])) {
 978                                                         DBA::delete('item-content', ['id' => $item['icid']]);
 979                                                 }
 980                                         }
 981                                 } elseif (!empty($item['icid'])) {
 982                                         DBA::update('item', ['icid' => null], ['id' => $item['id']]);
 983
 984                                         if (!DBA::exists('item', ['icid' => $item['icid']])) {
 985                                                 DBA::delete('item-content', ['id' => $item['icid']]);
 986                                         }
 987                                 }
 988                         } else {
 989                                 self::updateContent($content_fields, ['uri-id' => $item['uri-id']]);
 990
 991                                 if (empty($item['icid'])) {
 992                                         $item_content = DBA::selectFirst('item-content', [], ['uri-id' => $item['uri-id']]);
 993                                         if (DBA::isResult($item_content)) {
 994                                                 $item_fields = ['icid' => $item_content['id']];
 995                                                 // Clear all fields in the item table that have a content in the item-content table
 996                                                 foreach ($item_content as $field => $content) {
 997                                                         if (in_array($field, self::MIXED_CONTENT_FIELDLIST) && !empty($item_content[$field])) {
 998                                                                 if (self::isLegacyMode()) {
 999                                                                         $item_fields[$field] = null;
1000                                                                 } else {
1001                                                                         unset($item_fields[$field]);
1002                                                                 }
1003                                                         }
1004                                                 }
1005                                                 DBA::update('item', $item_fields, ['id' => $item['id']]);
1006                                         }
1007                                 }
1008                         }
1009
1010                         if (!is_null($tags)) {
1011                                 Term::insertFromTagFieldByItemId($item['id'], $tags);
1012                                 if (!empty($item['tag'])) {
1013                                         DBA::update('item', ['tag' => ''], ['id' => $item['id']]);
1014                                 }
1015                         }
1016
1017                         if (!is_null($files)) {
1018                                 Term::insertFromFileFieldByItemId($item['id'], $files);
1019                                 if (!empty($item['file'])) {
1020                                         DBA::update('item', ['file' => ''], ['id' => $item['id']]);
1021                                 }
1022                         }
1023
1024                         ItemDeliveryData::update($item['id'], $delivery_data);
1025
1026                         self::updateThread($item['id']);
1027
1028                         // We only need to notfiy others when it is an original entry from us.
1029                         // Only call the notifier when the item has some content relevant change.
1030                         if ($item['origin'] && in_array('edited', array_keys($fields))) {
1031                                 $notify_items[] = $item['id'];
1032                         }
1033                 }
1034
1035                 DBA::close($items);
1036                 DBA::commit();
1037
1038                 foreach ($notify_items as $notify_item) {
1039                         Worker::add(PRIORITY_HIGH, "Notifier", Delivery::POST, $notify_item);
1040                 }
1041
1042                 return $rows;
1043         }
1044
1045         /**
1046          * Delete an item and notify others about it - if it was ours
1047          *
1048          * @param array   $condition The condition for finding the item entries
1049          * @param integer $priority  Priority for the notification
1050          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1051          */
1052         public static function delete($condition, $priority = PRIORITY_HIGH)
1053         {
1054                 $items = self::select(['id'], $condition);
1055                 while ($item = self::fetch($items)) {
1056                         self::deleteById($item['id'], $priority);
1057                 }
1058                 DBA::close($items);
1059         }
1060
1061         /**
1062          * Delete an item for an user and notify others about it - if it was ours
1063          *
1064          * @param array   $condition The condition for finding the item entries
1065          * @param integer $uid       User who wants to delete this item
1066          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1067          */
1068         public static function deleteForUser($condition, $uid)
1069         {
1070                 if ($uid == 0) {
1071                         return;
1072                 }
1073
1074                 $items = self::select(['id', 'uid'], $condition);
1075                 while ($item = self::fetch($items)) {
1076                         // "Deleting" global items just means hiding them
1077                         if ($item['uid'] == 0) {
1078                                 DBA::update('user-item', ['hidden' => true], ['iid' => $item['id'], 'uid' => $uid], true);
1079
1080                                 // Delete notifications
1081                                 DBA::delete('notify', ['iid' => $item['id'], 'uid' => $uid]);
1082                         } elseif ($item['uid'] == $uid) {
1083                                 self::deleteById($item['id'], PRIORITY_HIGH);
1084                         } else {
1085                                 Logger::log('Wrong ownership. Not deleting item ' . $item['id']);
1086                         }
1087                 }
1088                 DBA::close($items);
1089         }
1090
1091         /**
1092          * Delete an item and notify others about it - if it was ours
1093          *
1094          * @param integer $item_id  Item ID that should be delete
1095          * @param integer $priority Priority for the notification
1096          *
1097          * @return boolean success
1098          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1099          */
1100         public static function deleteById($item_id, $priority = PRIORITY_HIGH)
1101         {
1102                 // locate item to be deleted
1103                 $fields = ['id', 'uri', 'uid', 'parent', 'parent-uri', 'origin',
1104                         'deleted', 'file', 'resource-id', 'event-id', 'attach',
1105                         'verb', 'object-type', 'object', 'target', 'contact-id',
1106                         'icid', 'iaid', 'psid'];
1107                 $item = self::selectFirst($fields, ['id' => $item_id]);
1108                 if (!DBA::isResult($item)) {
1109                         Logger::log('Item with ID ' . $item_id . " hasn't been found.", Logger::DEBUG);
1110                         return false;
1111                 }
1112
1113                 if ($item['deleted']) {
1114                         Logger::log('Item with ID ' . $item_id . ' has already been deleted.', Logger::DEBUG);
1115                         return false;
1116                 }
1117
1118                 $parent = self::selectFirst(['origin'], ['id' => $item['parent']]);
1119                 if (!DBA::isResult($parent)) {
1120                         $parent = ['origin' => false];
1121                 }
1122
1123                 // clean up categories and tags so they don't end up as orphans
1124
1125                 $matches = false;
1126                 $cnt = preg_match_all('/<(.*?)>/', $item['file'], $matches, PREG_SET_ORDER);
1127
1128                 if ($cnt) {
1129                         foreach ($matches as $mtch) {
1130                                 FileTag::unsaveFile($item['uid'], $item['id'], $mtch[1],true);
1131                         }
1132                 }
1133
1134                 $matches = false;
1135
1136                 $cnt = preg_match_all('/\[(.*?)\]/', $item['file'], $matches, PREG_SET_ORDER);
1137
1138                 if ($cnt) {
1139                         foreach ($matches as $mtch) {
1140                                 FileTag::unsaveFile($item['uid'], $item['id'], $mtch[1],false);
1141                         }
1142                 }
1143
1144                 /*
1145                  * If item is a link to a photo resource, nuke all the associated photos
1146                  * (visitors will not have photo resources)
1147                  * This only applies to photos uploaded from the photos page. Photos inserted into a post do not
1148                  * generate a resource-id and therefore aren't intimately linked to the item.
1149                  */
1150                 /// @TODO: this should first check if photo is used elsewhere
1151                 if (strlen($item['resource-id'])) {
1152                         Photo::delete(['resource-id' => $item['resource-id'], 'uid' => $item['uid']]);
1153                 }
1154
1155                 // If item is a link to an event, delete the event.
1156                 if (intval($item['event-id'])) {
1157                         Event::delete($item['event-id']);
1158                 }
1159
1160                 // If item has attachments, drop them
1161                 /// @TODO: this should first check if attachment is used elsewhere
1162                 foreach (explode(",", $item['attach']) as $attach) {
1163                         preg_match("|attach/(\d+)|", $attach, $matches);
1164                         if (is_array($matches) && count($matches) > 1) {
1165                                 Attach::delete(['id' => $matches[1], 'uid' => $item['uid']]);
1166                         }
1167                 }
1168
1169                 // Delete tags that had been attached to other items
1170                 self::deleteTagsFromItem($item);
1171
1172                 // Delete notifications
1173                 DBA::delete('notify', ['iid' => $item['id'], 'uid' => $item['uid']]);
1174
1175                 // Set the item to "deleted"
1176                 $item_fields = ['deleted' => true, 'edited' => DateTimeFormat::utcNow(), 'changed' => DateTimeFormat::utcNow()];
1177                 DBA::update('item', $item_fields, ['id' => $item['id']]);
1178
1179                 Term::insertFromTagFieldByItemId($item['id'], '');
1180                 Term::insertFromFileFieldByItemId($item['id'], '');
1181                 self::deleteThread($item['id'], $item['parent-uri']);
1182
1183                 if (!self::exists(["`uri` = ? AND `uid` != 0 AND NOT `deleted`", $item['uri']])) {
1184                         self::delete(['uri' => $item['uri'], 'uid' => 0, 'deleted' => false], $priority);
1185                 }
1186
1187                 ItemDeliveryData::delete($item['id']);
1188
1189                 // We don't delete the item-activity here, since we need some of the data for ActivityPub
1190
1191                 if (!empty($item['icid']) && !self::exists(['icid' => $item['icid'], 'deleted' => false])) {
1192                         DBA::delete('item-content', ['id' => $item['icid']], ['cascade' => false]);
1193                 }
1194                 // When the permission set will be used in photo and events as well,
1195                 // this query here needs to be extended.
1196                 // @todo Currently deactivated. We need the permission set in the deletion process.
1197                 // This is a reminder to add the removal somewhere else.
1198                 //if (!empty($item['psid']) && !self::exists(['psid' => $item['psid'], 'deleted' => false])) {
1199                 //      DBA::delete('permissionset', ['id' => $item['psid']], ['cascade' => false]);
1200                 //}
1201
1202                 // If it's the parent of a comment thread, kill all the kids
1203                 if ($item['id'] == $item['parent']) {
1204                         self::delete(['parent' => $item['parent'], 'deleted' => false], $priority);
1205                 }
1206
1207                 // Is it our comment and/or our thread?
1208                 if ($item['origin'] || $parent['origin']) {
1209
1210                         // When we delete the original post we will delete all existing copies on the server as well
1211                         self::delete(['uri' => $item['uri'], 'deleted' => false], $priority);
1212
1213                         // send the notification upstream/downstream
1214                         Worker::add(['priority' => $priority, 'dont_fork' => true], "Notifier", Delivery::DELETION, intval($item['id']));
1215                 } elseif ($item['uid'] != 0) {
1216
1217                         // When we delete just our local user copy of an item, we have to set a marker to hide it
1218                         $global_item = self::selectFirst(['id'], ['uri' => $item['uri'], 'uid' => 0, 'deleted' => false]);
1219                         if (DBA::isResult($global_item)) {
1220                                 DBA::update('user-item', ['hidden' => true], ['iid' => $global_item['id'], 'uid' => $item['uid']], true);
1221                         }
1222                 }
1223
1224                 Logger::log('Item with ID ' . $item_id . " has been deleted.", Logger::DEBUG);
1225
1226                 return true;
1227         }
1228
1229         private static function deleteTagsFromItem($item)
1230         {
1231                 if (($item["verb"] != Activity::TAG) || ($item["object-type"] != Activity\ObjectType::TAGTERM)) {
1232                         return;
1233                 }
1234
1235                 $xo = XML::parseString($item["object"], false);
1236                 $xt = XML::parseString($item["target"], false);
1237
1238                 if ($xt->type != Activity\ObjectType::NOTE) {
1239                         return;
1240                 }
1241
1242                 $i = self::selectFirst(['id', 'contact-id', 'tag'], ['uri' => $xt->id, 'uid' => $item['uid']]);
1243                 if (!DBA::isResult($i)) {
1244                         return;
1245                 }
1246
1247                 // For tags, the owner cannot remove the tag on the author's copy of the post.
1248                 $owner_remove = ($item["contact-id"] == $i["contact-id"]);
1249                 $author_copy = $item["origin"];
1250
1251                 if (($owner_remove && $author_copy) || !$owner_remove) {
1252                         return;
1253                 }
1254
1255                 $tags = explode(',', $i["tag"]);
1256                 $newtags = [];
1257                 if (count($tags)) {
1258                         foreach ($tags as $tag) {
1259                                 if (trim($tag) !== trim($xo->body)) {
1260                                        $newtags[] = trim($tag);
1261                                 }
1262                         }
1263                 }
1264                 self::update(['tag' => implode(',', $newtags)], ['id' => $i["id"]]);
1265         }
1266
1267         private static function guid($item, $notify)
1268         {
1269                 if (!empty($item['guid'])) {
1270                         return Strings::escapeTags(trim($item['guid']));
1271                 }
1272
1273                 if ($notify) {
1274                         // We have to avoid duplicates. So we create the GUID in form of a hash of the plink or uri.
1275                         // We add the hash of our own host because our host is the original creator of the post.
1276                         $prefix_host = DI::baseUrl()->getHostname();
1277                 } else {
1278                         $prefix_host = '';
1279
1280                         // We are only storing the post so we create a GUID from the original hostname.
1281                         if (!empty($item['author-link'])) {
1282                                 $parsed = parse_url($item['author-link']);
1283                                 if (!empty($parsed['host'])) {
1284                                         $prefix_host = $parsed['host'];
1285                                 }
1286                         }
1287
1288                         if (empty($prefix_host) && !empty($item['plink'])) {
1289                                 $parsed = parse_url($item['plink']);
1290                                 if (!empty($parsed['host'])) {
1291                                         $prefix_host = $parsed['host'];
1292                                 }
1293                         }
1294
1295                         if (empty($prefix_host) && !empty($item['uri'])) {
1296                                 $parsed = parse_url($item['uri']);
1297                                 if (!empty($parsed['host'])) {
1298                                         $prefix_host = $parsed['host'];
1299                                 }
1300                         }
1301
1302                         // Is it in the format data@host.tld? - Used for mail contacts
1303                         if (empty($prefix_host) && !empty($item['author-link']) && strstr($item['author-link'], '@')) {
1304                                 $mailparts = explode('@', $item['author-link']);
1305                                 $prefix_host = array_pop($mailparts);
1306                         }
1307                 }
1308
1309                 if (!empty($item['plink'])) {
1310                         $guid = self::guidFromUri($item['plink'], $prefix_host);
1311                 } elseif (!empty($item['uri'])) {
1312                         $guid = self::guidFromUri($item['uri'], $prefix_host);
1313                 } else {
1314                         $guid = System::createUUID(hash('crc32', $prefix_host));
1315                 }
1316
1317                 return $guid;
1318         }
1319
1320         private static function contactId($item)
1321         {
1322                 if (!empty($item['contact-id']) && DBA::exists('contact', ['self' => true, 'id' => $item['contact-id']])) {
1323                         return $item['contact-id'];
1324                 } elseif (($item['gravity'] == GRAVITY_PARENT) && !empty($item['uid']) && !empty($item['contact-id']) && Contact::isSharing($item['contact-id'], $item['uid'])) {
1325                         return $item['contact-id'];
1326                 } elseif (!empty($item['uid']) && !Contact::isSharing($item['author-id'], $item['uid'])) {
1327                         return $item['author-id'];
1328                 } elseif (!empty($item['contact-id'])) {
1329                         return $item['contact-id'];
1330                 } else {
1331                         $contact_id = Contact::getIdForURL($item['author-link'], $item['uid']);
1332                         if (!empty($contact_id)) {
1333                                 return $contact_id;
1334                         }
1335                 }
1336                 return $item['author-id'];
1337         }
1338
1339         // This function will finally cover most of the preparation functionality in mod/item.php
1340         public static function prepare(&$item)
1341         {
1342                 /*
1343                  * @TODO: Unused code triggering inspection errors
1344                  *
1345                 $data = BBCode::getAttachmentData($item['body']);
1346                 if ((preg_match_all("/\[bookmark\=([^\]]*)\](.*?)\[\/bookmark\]/ism", $item['body'], $match, PREG_SET_ORDER) || isset($data["type"]))
1347                         && ($posttype != Item::PT_PERSONAL_NOTE)) {
1348                         $posttype = Item::PT_PAGE;
1349                         $objecttype = ACTIVITY_OBJ_BOOKMARK;
1350                 }
1351                  */
1352         }
1353
1354         /**
1355          * Write an item array into a spool file to be inserted later.
1356          * This command is called whenever there are issues storing an item.
1357          *
1358          * @param array $item The item fields that are to be inserted
1359          * @throws \Exception
1360          */
1361         private static function spool($orig_item)
1362         {
1363                 // Now we store the data in the spool directory
1364                 // We use "microtime" to keep the arrival order and "mt_rand" to avoid duplicates
1365                 $file = 'item-' . round(microtime(true) * 10000) . '-' . mt_rand() . '.msg';
1366
1367                 $spoolpath = get_spoolpath();
1368                 if ($spoolpath != "") {
1369                         $spool = $spoolpath . '/' . $file;
1370
1371                         file_put_contents($spool, json_encode($orig_item));
1372                         Logger::warning("Item wasn't stored - Item was spooled into file", ['file' => $file]);
1373                 }
1374         }
1375
1376         public static function insert($item, $force_parent = false, $notify = false, $dontcache = false)
1377         {
1378                 $orig_item = $item;
1379
1380                 $priority = PRIORITY_HIGH;
1381
1382                 // If it is a posting where users should get notifications, then define it as wall posting
1383                 if ($notify) {
1384                         $item['wall'] = 1;
1385                         $item['origin'] = 1;
1386                         $item['network'] = Protocol::DFRN;
1387                         $item['protocol'] = Conversation::PARCEL_DFRN;
1388
1389                         if (is_int($notify)) {
1390                                 $priority = $notify;
1391                         }
1392                 } else {
1393                         $item['network'] = trim(($item['network'] ?? '') ?: Protocol::PHANTOM);
1394                 }
1395
1396                 $item['guid'] = self::guid($item, $notify);
1397                 $item['uri'] = Strings::escapeTags(trim(($item['uri'] ?? '') ?: self::newURI($item['uid'], $item['guid'])));
1398
1399                 // Store URI data
1400                 $item['uri-id'] = ItemURI::insert(['uri' => $item['uri'], 'guid' => $item['guid']]);
1401
1402                 // Store conversation data
1403                 $item = Conversation::insert($item);
1404
1405                 /*
1406                  * If a Diaspora signature structure was passed in, pull it out of the
1407                  * item array and set it aside for later storage.
1408                  */
1409
1410                 $dsprsig = null;
1411                 if (isset($item['dsprsig'])) {
1412                         $encoded_signature = $item['dsprsig'];
1413                         $dsprsig = json_decode(base64_decode($item['dsprsig']));
1414                         unset($item['dsprsig']);
1415                 }
1416
1417                 $diaspora_signed_text = '';
1418                 if (isset($item['diaspora_signed_text'])) {
1419                         $diaspora_signed_text = $item['diaspora_signed_text'];
1420                         unset($item['diaspora_signed_text']);
1421                 }
1422
1423                 // Converting the plink
1424                 /// @TODO Check if this is really still needed
1425                 if ($item['network'] == Protocol::OSTATUS) {
1426                         if (isset($item['plink'])) {
1427                                 $item['plink'] = OStatus::convertHref($item['plink']);
1428                         } elseif (isset($item['uri'])) {
1429                                 $item['plink'] = OStatus::convertHref($item['uri']);
1430                         }
1431                 }
1432
1433                 if (!empty($item['thr-parent'])) {
1434                         $item['parent-uri'] = $item['thr-parent'];
1435                 }
1436
1437                 $activity = DI::activity();
1438
1439                 if (isset($item['gravity'])) {
1440                         $item['gravity'] = intval($item['gravity']);
1441                 } elseif ($item['parent-uri'] === $item['uri']) {
1442                         $item['gravity'] = GRAVITY_PARENT;
1443                 } elseif ($activity->match($item['verb'], Activity::POST)) {
1444                         $item['gravity'] = GRAVITY_COMMENT;
1445                 } elseif ($activity->match($item['verb'], Activity::FOLLOW)) {
1446                         $item['gravity'] = GRAVITY_ACTIVITY;
1447                 } else {
1448                         $item['gravity'] = GRAVITY_UNKNOWN;   // Should not happen
1449                         Logger::log('Unknown gravity for verb: ' . $item['verb'], Logger::DEBUG);
1450                 }
1451
1452                 $uid = intval($item['uid']);
1453
1454                 // check for create date and expire time
1455                 $expire_interval = Config::get('system', 'dbclean-expire-days', 0);
1456
1457                 $user = DBA::selectFirst('user', ['expire'], ['uid' => $uid]);
1458                 if (DBA::isResult($user) && ($user['expire'] > 0) && (($user['expire'] < $expire_interval) || ($expire_interval == 0))) {
1459                         $expire_interval = $user['expire'];
1460                 }
1461
1462                 if (($expire_interval > 0) && !empty($item['created'])) {
1463                         $expire_date = time() - ($expire_interval * 86400);
1464                         $created_date = strtotime($item['created']);
1465                         if ($created_date < $expire_date) {
1466                                 Logger::notice('Item created before expiration interval.', [
1467                                         'created' => date('c', $created_date),
1468                                         'expired' => date('c', $expire_date),
1469                                         '$item' => $item
1470                                 ]);
1471                                 return 0;
1472                         }
1473                 }
1474
1475                 /*
1476                  * Do we already have this item?
1477                  * We have to check several networks since Friendica posts could be repeated
1478                  * via OStatus (maybe Diasporsa as well)
1479                  */
1480                 if (empty($item['network']) || in_array($item['network'], Protocol::FEDERATED)) {
1481                         $condition = ["`uri` = ? AND `uid` = ? AND `network` IN (?, ?, ?, ?)",
1482                                 trim($item['uri']), $item['uid'],
1483                                 Protocol::ACTIVITYPUB, Protocol::DIASPORA, Protocol::DFRN, Protocol::OSTATUS];
1484                         $existing = self::selectFirst(['id', 'network'], $condition);
1485                         if (DBA::isResult($existing)) {
1486                                 // We only log the entries with a different user id than 0. Otherwise we would have too many false positives
1487                                 if ($uid != 0) {
1488                                         Logger::notice('Item already existed for user', [
1489                                                 'uri' => $item['uri'],
1490                                                 'uid' => $uid,
1491                                                 'network' => $item['network'],
1492                                                 'existing_id' => $existing["id"],
1493                                                 'existing_network' => $existing["network"]
1494                                         ]);
1495                                 }
1496
1497                                 return $existing["id"];
1498                         }
1499                 }
1500
1501                 $item['wall']          = intval($item['wall'] ?? 0);
1502                 $item['extid']         = trim($item['extid'] ?? '');
1503                 $item['author-name']   = trim($item['author-name'] ?? '');
1504                 $item['author-link']   = trim($item['author-link'] ?? '');
1505                 $item['author-avatar'] = trim($item['author-avatar'] ?? '');
1506                 $item['owner-name']    = trim($item['owner-name'] ?? '');
1507                 $item['owner-link']    = trim($item['owner-link'] ?? '');
1508                 $item['owner-avatar']  = trim($item['owner-avatar'] ?? '');
1509                 $item['received']      = (isset($item['received'])  ? DateTimeFormat::utc($item['received'])  : DateTimeFormat::utcNow());
1510                 $item['created']       = (isset($item['created'])   ? DateTimeFormat::utc($item['created'])   : $item['received']);
1511                 $item['edited']        = (isset($item['edited'])    ? DateTimeFormat::utc($item['edited'])    : $item['created']);
1512                 $item['changed']       = (isset($item['changed'])   ? DateTimeFormat::utc($item['changed'])   : $item['created']);
1513                 $item['commented']     = (isset($item['commented']) ? DateTimeFormat::utc($item['commented']) : $item['created']);
1514                 $item['title']         = trim($item['title'] ?? '');
1515                 $item['location']      = trim($item['location'] ?? '');
1516                 $item['coord']         = trim($item['coord'] ?? '');
1517                 $item['visible']       = (isset($item['visible']) ? intval($item['visible']) : 1);
1518                 $item['deleted']       = 0;
1519                 $item['parent-uri']    = trim(($item['parent-uri'] ?? '') ?: $item['uri']);
1520                 $item['post-type']     = ($item['post-type'] ?? '') ?: self::PT_ARTICLE;
1521                 $item['verb']          = trim($item['verb'] ?? '');
1522                 $item['object-type']   = trim($item['object-type'] ?? '');
1523                 $item['object']        = trim($item['object'] ?? '');
1524                 $item['target-type']   = trim($item['target-type'] ?? '');
1525                 $item['target']        = trim($item['target'] ?? '');
1526                 $item['plink']         = trim($item['plink'] ?? '');
1527                 $item['allow_cid']     = trim($item['allow_cid'] ?? '');
1528                 $item['allow_gid']     = trim($item['allow_gid'] ?? '');
1529                 $item['deny_cid']      = trim($item['deny_cid'] ?? '');
1530                 $item['deny_gid']      = trim($item['deny_gid'] ?? '');
1531                 $item['private']       = intval($item['private'] ?? 0);
1532                 $item['body']          = trim($item['body'] ?? '');
1533                 $item['tag']           = trim($item['tag'] ?? '');
1534                 $item['attach']        = trim($item['attach'] ?? '');
1535                 $item['app']           = trim($item['app'] ?? '');
1536                 $item['origin']        = intval($item['origin'] ?? 0);
1537                 $item['postopts']      = trim($item['postopts'] ?? '');
1538                 $item['resource-id']   = trim($item['resource-id'] ?? '');
1539                 $item['event-id']      = intval($item['event-id'] ?? 0);
1540                 $item['inform']        = trim($item['inform'] ?? '');
1541                 $item['file']          = trim($item['file'] ?? '');
1542
1543                 // When there is no content then we don't post it
1544                 if ($item['body'].$item['title'] == '') {
1545                         Logger::notice('No body, no title.');
1546                         return 0;
1547                 }
1548
1549                 self::addLanguageToItemArray($item);
1550
1551                 // Items cannot be stored before they happen ...
1552                 if ($item['created'] > DateTimeFormat::utcNow()) {
1553                         $item['created'] = DateTimeFormat::utcNow();
1554                 }
1555
1556                 // We haven't invented time travel by now.
1557                 if ($item['edited'] > DateTimeFormat::utcNow()) {
1558                         $item['edited'] = DateTimeFormat::utcNow();
1559                 }
1560
1561                 $item['plink'] = ($item['plink'] ?? '') ?: DI::baseUrl() . '/display/' . urlencode($item['guid']);
1562
1563                 $default = ['url' => $item['author-link'], 'name' => $item['author-name'],
1564                         'photo' => $item['author-avatar'], 'network' => $item['network']];
1565
1566                 $item['author-id'] = ($item['author-id'] ?? 0) ?: Contact::getIdForURL($item['author-link'], 0, false, $default);
1567
1568                 if (Contact::isBlocked($item['author-id'])) {
1569                         Logger::notice('Author is blocked node-wide', ['author-link' => $item['author-link'], 'item-uri' => $item['uri']]);
1570                         return 0;
1571                 }
1572
1573                 if (!empty($item['author-link']) && Network::isUrlBlocked($item['author-link'])) {
1574                         Logger::notice('Author server is blocked', ['author-link' => $item['author-link'], 'item-uri' => $item['uri']]);
1575                         return 0;
1576                 }
1577
1578                 if (!empty($uid) && Contact::isBlockedByUser($item['author-id'], $uid)) {
1579                         Logger::notice('Author is blocked by user', ['author-link' => $item['author-link'], 'uid' => $uid, 'item-uri' => $item['uri']]);
1580                         return 0;
1581                 }
1582
1583                 $default = ['url' => $item['owner-link'], 'name' => $item['owner-name'],
1584                         'photo' => $item['owner-avatar'], 'network' => $item['network']];
1585
1586                 $item['owner-id'] = ($item['owner-id'] ?? 0) ?: Contact::getIdForURL($item['owner-link'], 0, false, $default);
1587
1588                 if (Contact::isBlocked($item['owner-id'])) {
1589                         Logger::notice('Owner is blocked node-wide', ['owner-link' => $item['owner-link'], 'item-uri' => $item['uri']]);
1590                         return 0;
1591                 }
1592
1593                 if (!empty($item['owner-link']) && Network::isUrlBlocked($item['owner-link'])) {
1594                         Logger::notice('Owner server is blocked', ['owner-link' => $item['owner-link'], 'item-uri' => $item['uri']]);
1595                         return 0;
1596                 }
1597
1598                 if (!empty($uid) && Contact::isBlockedByUser($item['owner-id'], $uid)) {
1599                         Logger::notice('Owner is blocked by user', ['owner-link' => $item['owner-link'], 'uid' => $uid, 'item-uri' => $item['uri']]);
1600                         return 0;
1601                 }
1602
1603                 // The causer is set during a thread completion, for example because of a reshare. It countains the responsible actor.
1604                 if (!empty($uid) && !empty($item['causer-id']) && Contact::isBlockedByUser($item['causer-id'], $uid)) {
1605                         Logger::notice('Causer is blocked by user', ['causer-link' => $item['causer-link'], 'uid' => $uid, 'item-uri' => $item['uri']]);
1606                         return 0;
1607                 }
1608
1609                 if (!empty($uid) && !empty($item['causer-id']) && ($item['parent-uri'] == $item['uri']) && Contact::isIgnoredByUser($item['causer-id'], $uid)) {
1610                         Logger::notice('Causer is ignored by user', ['causer-link' => $item['causer-link'], 'uid' => $uid, 'item-uri' => $item['uri']]);
1611                         return 0;
1612                 }
1613
1614                 // We don't store the causer, we only have it here for the checks above
1615                 unset($item['causer-id']);
1616                 unset($item['causer-link']);
1617
1618                 // The contact-id should be set before "self::insert" was called - but there seems to be issues sometimes
1619                 $item["contact-id"] = self::contactId($item);
1620
1621                 if ($item['network'] == Protocol::PHANTOM) {
1622                         $item['network'] = Protocol::DFRN;
1623                         Logger::notice('Missing network, setting to {network}.', [
1624                                 'uri' => $item["uri"],
1625                                 'network' => $item['network'],
1626                                 'callstack' => System::callstack()
1627                         ]);
1628                 }
1629
1630                 // Checking if there is already an item with the same guid
1631                 $condition = ['guid' => $item['guid'], 'network' => $item['network'], 'uid' => $item['uid']];
1632                 if (self::exists($condition)) {
1633                         Logger::notice('Found already existing item', [
1634                                 'guid' => $item['guid'],
1635                                 'uid' => $item['uid'],
1636                                 'network' => $item['network']
1637                         ]);
1638                         return 0;
1639                 }
1640
1641                 if ($item['verb'] == Activity::FOLLOW) {
1642                         if (!$item['origin'] && ($item['author-id'] == Contact::getPublicIdByUserId($uid))) {
1643                                 // Our own follow request can be relayed to us. We don't store it to avoid notification chaos.
1644                                 Logger::log("Follow: Don't store not origin follow request from us for " . $item['parent-uri'], Logger::DEBUG);
1645                                 return 0;
1646                         }
1647
1648                         $condition = ['verb' => Activity::FOLLOW, 'uid' => $item['uid'],
1649                                 'parent-uri' => $item['parent-uri'], 'author-id' => $item['author-id']];
1650                         if (self::exists($condition)) {
1651                                 // It happens that we receive multiple follow requests by the same author - we only store one.
1652                                 Logger::log('Follow: Found existing follow request from author ' . $item['author-id'] . ' for ' . $item['parent-uri'], Logger::DEBUG);
1653                                 return 0;
1654                         }
1655                 }
1656
1657                 // Check for hashtags in the body and repair or add hashtag links
1658                 self::setHashtags($item);
1659
1660                 $item['thr-parent'] = $item['parent-uri'];
1661
1662                 $notify_type = Delivery::POST;
1663                 $allow_cid = '';
1664                 $allow_gid = '';
1665                 $deny_cid  = '';
1666                 $deny_gid  = '';
1667
1668                 if ($item['parent-uri'] === $item['uri']) {
1669                         $parent_id = 0;
1670                         $parent_deleted = 0;
1671                         $allow_cid = $item['allow_cid'];
1672                         $allow_gid = $item['allow_gid'];
1673                         $deny_cid  = $item['deny_cid'];
1674                         $deny_gid  = $item['deny_gid'];
1675                 } else {
1676                         // find the parent and snarf the item id and ACLs
1677                         // and anything else we need to inherit
1678
1679                         $fields = ['uri', 'parent-uri', 'id', 'deleted',
1680                                 'allow_cid', 'allow_gid', 'deny_cid', 'deny_gid',
1681                                 'wall', 'private', 'forum_mode', 'origin'];
1682                         $condition = ['uri' => $item['parent-uri'], 'uid' => $item['uid']];
1683                         $params = ['order' => ['id' => false]];
1684                         $parent = self::selectFirst($fields, $condition, $params);
1685
1686                         if (DBA::isResult($parent)) {
1687                                 // is the new message multi-level threaded?
1688                                 // even though we don't support it now, preserve the info
1689                                 // and re-attach to the conversation parent.
1690
1691                                 if ($parent['uri'] != $parent['parent-uri']) {
1692                                         $item['parent-uri'] = $parent['parent-uri'];
1693
1694                                         $condition = ['uri' => $item['parent-uri'],
1695                                                 'parent-uri' => $item['parent-uri'],
1696                                                 'uid' => $item['uid']];
1697                                         $params = ['order' => ['id' => false]];
1698                                         $toplevel_parent = self::selectFirst($fields, $condition, $params);
1699
1700                                         if (DBA::isResult($toplevel_parent)) {
1701                                                 $parent = $toplevel_parent;
1702                                         }
1703                                 }
1704
1705                                 $parent_id      = $parent['id'];
1706                                 $parent_deleted = $parent['deleted'];
1707                                 $allow_cid      = $parent['allow_cid'];
1708                                 $allow_gid      = $parent['allow_gid'];
1709                                 $deny_cid       = $parent['deny_cid'];
1710                                 $deny_gid       = $parent['deny_gid'];
1711                                 $item['wall']   = $parent['wall'];
1712
1713                                 /*
1714                                  * If the parent is private, force privacy for the entire conversation
1715                                  * This differs from the above settings as it subtly allows comments from
1716                                  * email correspondents to be private even if the overall thread is not.
1717                                  */
1718                                 if ($parent['private']) {
1719                                         $item['private'] = $parent['private'];
1720                                 }
1721
1722                                 /*
1723                                  * Edge case. We host a public forum that was originally posted to privately.
1724                                  * The original author commented, but as this is a comment, the permissions
1725                                  * weren't fixed up so it will still show the comment as private unless we fix it here.
1726                                  */
1727                                 if ((intval($parent['forum_mode']) == 1) && $parent['private']) {
1728                                         $item['private'] = 0;
1729                                 }
1730
1731                                 // If its a post that originated here then tag the thread as "mention"
1732                                 if ($item['origin'] && $item['uid']) {
1733                                         DBA::update('thread', ['mention' => true], ['iid' => $parent_id]);
1734                                         Logger::log('tagged thread ' . $parent_id . ' as mention for user ' . $item['uid'], Logger::DEBUG);
1735                                 }
1736                         } else {
1737                                 /*
1738                                  * Allow one to see reply tweets from status.net even when
1739                                  * we don't have or can't see the original post.
1740                                  */
1741                                 if ($force_parent) {
1742                                         Logger::log('$force_parent=true, reply converted to top-level post.');
1743                                         $parent_id = 0;
1744                                         $item['parent-uri'] = $item['uri'];
1745                                         $item['gravity'] = GRAVITY_PARENT;
1746                                 } else {
1747                                         Logger::log('item parent '.$item['parent-uri'].' for '.$item['uid'].' was not found - ignoring item');
1748                                         return 0;
1749                                 }
1750
1751                                 $parent_deleted = 0;
1752                         }
1753                 }
1754
1755                 if (stristr($item['verb'], Activity::POKE)) {
1756                         $notify_type = Delivery::POKE;
1757                 }
1758
1759                 $item['parent-uri-id'] = ItemURI::getIdByURI($item['parent-uri']);
1760                 $item['thr-parent-id'] = ItemURI::getIdByURI($item['thr-parent']);
1761
1762                 $condition = ["`uri` = ? AND `network` IN (?, ?) AND `uid` = ?",
1763                         $item['uri'], $item['network'], Protocol::DFRN, $item['uid']];
1764                 if (self::exists($condition)) {
1765                         Logger::log('duplicated item with the same uri found. '.print_r($item,true));
1766                         return 0;
1767                 }
1768
1769                 // On Friendica and Diaspora the GUID is unique
1770                 if (in_array($item['network'], [Protocol::DFRN, Protocol::DIASPORA])) {
1771                         $condition = ['guid' => $item['guid'], 'uid' => $item['uid']];
1772                         if (self::exists($condition)) {
1773                                 Logger::log('duplicated item with the same guid found. '.print_r($item,true));
1774                                 return 0;
1775                         }
1776                 } elseif ($item['network'] == Protocol::OSTATUS) {
1777                         // Check for an existing post with the same content. There seems to be a problem with OStatus.
1778                         $condition = ["`body` = ? AND `network` = ? AND `created` = ? AND `contact-id` = ? AND `uid` = ?",
1779                                         $item['body'], $item['network'], $item['created'], $item['contact-id'], $item['uid']];
1780                         if (self::exists($condition)) {
1781                                 Logger::log('duplicated item with the same body found. '.print_r($item,true));
1782                                 return 0;
1783                         }
1784                 }
1785
1786                 // Is this item available in the global items (with uid=0)?
1787                 if ($item["uid"] == 0) {
1788                         $item["global"] = true;
1789
1790                         // Set the global flag on all items if this was a global item entry
1791                         DBA::update('item', ['global' => true], ['uri' => $item["uri"]]);
1792                 } else {
1793                         $item["global"] = self::exists(['uid' => 0, 'uri' => $item["uri"]]);
1794                 }
1795
1796                 // ACL settings
1797                 if (strlen($allow_cid) || strlen($allow_gid) || strlen($deny_cid) || strlen($deny_gid)) {
1798                         $private = 1;
1799                 } else {
1800                         $private = $item['private'];
1801                 }
1802
1803                 $item["allow_cid"] = $allow_cid;
1804                 $item["allow_gid"] = $allow_gid;
1805                 $item["deny_cid"] = $deny_cid;
1806                 $item["deny_gid"] = $deny_gid;
1807                 $item["private"] = $private;
1808                 $item["deleted"] = $parent_deleted;
1809
1810                 // Fill the cache field
1811                 self::putInCache($item);
1812
1813                 if ($notify) {
1814                         $item['edit'] = false;
1815                         $item['parent'] = $parent_id;
1816                         Hook::callAll('post_local', $item);
1817                         unset($item['edit']);
1818                         unset($item['parent']);
1819                 } else {
1820                         Hook::callAll('post_remote', $item);
1821                 }
1822
1823                 // This array field is used to trigger some automatic reactions
1824                 // It is mainly used in the "post_local" hook.
1825                 unset($item['api_source']);
1826
1827                 if (!empty($item['cancel'])) {
1828                         Logger::log('post cancelled by addon.');
1829                         return 0;
1830                 }
1831
1832                 /*
1833                  * Check for already added items.
1834                  * There is a timing issue here that sometimes creates double postings.
1835                  * An unique index would help - but the limitations of MySQL (maximum size of index values) prevent this.
1836                  */
1837                 if ($item["uid"] == 0) {
1838                         if (self::exists(['uri' => trim($item['uri']), 'uid' => 0])) {
1839                                 Logger::log('Global item already stored. URI: '.$item['uri'].' on network '.$item['network'], Logger::DEBUG);
1840                                 return 0;
1841                         }
1842                 }
1843
1844                 Logger::log('' . print_r($item,true), Logger::DATA);
1845
1846                 if (array_key_exists('tag', $item)) {
1847                         $tags = $item['tag'];
1848                         unset($item['tag']);
1849                 } else {
1850                         $tags = '';
1851                 }
1852
1853                 if (array_key_exists('file', $item)) {
1854                         $files = $item['file'];
1855                         unset($item['file']);
1856                 } else {
1857                         $files = '';
1858                 }
1859
1860                 // Creates or assigns the permission set
1861                 $item['psid'] = PermissionSet::fetchIDForPost($item);
1862
1863                 // We are doing this outside of the transaction to avoid timing problems
1864                 if (!self::insertActivity($item)) {
1865                         self::insertContent($item);
1866                 }
1867
1868                 $delivery_data = ItemDeliveryData::extractFields($item);
1869
1870                 unset($item['postopts']);
1871                 unset($item['inform']);
1872
1873                 // These fields aren't stored anymore in the item table, they are fetched upon request
1874                 unset($item['author-link']);
1875                 unset($item['author-name']);
1876                 unset($item['author-avatar']);
1877                 unset($item['author-network']);
1878
1879                 unset($item['owner-link']);
1880                 unset($item['owner-name']);
1881                 unset($item['owner-avatar']);
1882
1883                 $like_no_comment = Config::get('system', 'like_no_comment');
1884
1885                 DBA::transaction();
1886                 $ret = DBA::insert('item', $item);
1887
1888                 // When the item was successfully stored we fetch the ID of the item.
1889                 if (DBA::isResult($ret)) {
1890                         $current_post = DBA::lastInsertId();
1891                 } else {
1892                         // This can happen - for example - if there are locking timeouts.
1893                         DBA::rollback();
1894
1895                         // Store the data into a spool file so that we can try again later.
1896                         self::spool($orig_item);
1897                         return 0;
1898                 }
1899
1900                 if ($current_post == 0) {
1901                         // This is one of these error messages that never should occur.
1902                         Logger::log("couldn't find created item - we better quit now.");
1903                         DBA::rollback();
1904                         return 0;
1905                 }
1906
1907                 // How much entries have we created?
1908                 // We wouldn't need this query when we could use an unique index - but MySQL has length problems with them.
1909                 $entries = DBA::count('item', ['uri' => $item['uri'], 'uid' => $item['uid'], 'network' => $item['network']]);
1910
1911                 if ($entries > 1) {
1912                         // There are duplicates. We delete our just created entry.
1913                         Logger::log('Duplicated post occurred. uri = ' . $item['uri'] . ' uid = ' . $item['uid']);
1914
1915                         // Yes, we could do a rollback here - but we are having many users with MyISAM.
1916                         DBA::delete('item', ['id' => $current_post]);
1917                         DBA::commit();
1918                         return 0;
1919                 } elseif ($entries == 0) {
1920                         // This really should never happen since we quit earlier if there were problems.
1921                         Logger::log("Something is terribly wrong. We haven't found our created entry.");
1922                         DBA::rollback();
1923                         return 0;
1924                 }
1925
1926                 Logger::log('created item '.$current_post);
1927
1928                 if (!$parent_id || ($item['parent-uri'] === $item['uri'])) {
1929                         $parent_id = $current_post;
1930                 }
1931
1932                 // Set parent id
1933                 DBA::update('item', ['parent' => $parent_id], ['id' => $current_post]);
1934
1935                 $item['id'] = $current_post;
1936                 $item['parent'] = $parent_id;
1937
1938                 // update the commented timestamp on the parent
1939                 // Only update "commented" if it is really a comment
1940                 if (($item['gravity'] != GRAVITY_ACTIVITY) || !$like_no_comment) {
1941                         DBA::update('item', ['commented' => DateTimeFormat::utcNow(), 'changed' => DateTimeFormat::utcNow()], ['id' => $parent_id]);
1942                 } else {
1943                         DBA::update('item', ['changed' => DateTimeFormat::utcNow()], ['id' => $parent_id]);
1944                 }
1945
1946                 if ($dsprsig) {
1947                         /*
1948                          * Friendica servers lower than 3.4.3-2 had double encoded the signature ...
1949                          * We can check for this condition when we decode and encode the stuff again.
1950                          */
1951                         if (base64_encode(base64_decode(base64_decode($dsprsig->signature))) == base64_decode($dsprsig->signature)) {
1952                                 $dsprsig->signature = base64_decode($dsprsig->signature);
1953                                 Logger::log("Repaired double encoded signature from handle ".$dsprsig->signer, Logger::DEBUG);
1954                         }
1955
1956                         if (!empty($dsprsig->signed_text) && empty($dsprsig->signature) && empty($dsprsig->signer)) {
1957                                 DBA::insert('diaspora-interaction', ['uri-id' => $item['uri-id'], 'interaction' => $dsprsig->signed_text], true);
1958                         } else {
1959                                 // The other fields are used by very old Friendica servers, so we currently store them differently
1960                                 DBA::insert('sign', ['iid' => $current_post, 'signed_text' => $dsprsig->signed_text,
1961                                         'signature' => $dsprsig->signature, 'signer' => $dsprsig->signer]);
1962                         }
1963                 }
1964
1965                 if (!empty($diaspora_signed_text)) {
1966                         DBA::insert('diaspora-interaction', ['uri-id' => $item['uri-id'], 'interaction' => $diaspora_signed_text], true);
1967                 }
1968
1969                 if ($item['parent-uri'] === $item['uri']) {
1970                         self::addThread($current_post);
1971                 } else {
1972                         self::updateThread($parent_id);
1973                 }
1974
1975                 if (!empty($item['origin']) || !empty($item['wall']) || !empty($delivery_data['postopts']) || !empty($delivery_data['inform'])) {
1976                         ItemDeliveryData::insert($current_post, $delivery_data);
1977                 }
1978
1979                 DBA::commit();
1980
1981                 /*
1982                  * Due to deadlock issues with the "term" table we are doing these steps after the commit.
1983                  * This is not perfect - but a workable solution until we found the reason for the problem.
1984                  */
1985                 if (!empty($tags)) {
1986                         Term::insertFromTagFieldByItemId($current_post, $tags);
1987                 }
1988
1989                 if (!empty($files)) {
1990                         Term::insertFromFileFieldByItemId($current_post, $files);
1991                 }
1992
1993                 // In that function we check if this is a forum post. Additionally we delete the item under certain circumstances
1994                 if (self::tagDeliver($item['uid'], $current_post)) {
1995                         // Get the user information for the logging
1996                         $user = User::getById($uid);
1997
1998                         Logger::notice('Item had been deleted', ['id' => $current_post, 'user' => $uid, 'account-type' => $user['account-type']]);
1999                         return 0;
2000                 }
2001
2002                 if (!$dontcache) {
2003                         $posted_item = self::selectFirst(self::ITEM_FIELDLIST, ['id' => $current_post]);
2004                         if (DBA::isResult($posted_item)) {
2005                                 if ($notify) {
2006                                         Hook::callAll('post_local_end', $posted_item);
2007                                 } else {
2008                                         Hook::callAll('post_remote_end', $posted_item);
2009                                 }
2010                         } else {
2011                                 Logger::log('new item not found in DB, id ' . $current_post);
2012                         }
2013                 }
2014
2015                 if ($item['parent-uri'] === $item['uri']) {
2016                         self::addShadow($current_post);
2017                 } else {
2018                         self::addShadowPost($current_post);
2019                 }
2020
2021                 self::updateContact($item);
2022
2023                 UserItem::setNotification($current_post);
2024
2025                 check_user_notification($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          * 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                 $locked = DI::lock()->acquire('item_insert_activity');
2058                 if (!$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 ' . $item['uri'] . ' - should not happen');
2073                         DI::lock()->release('item_insert_activity');
2074                         return false;
2075                 }
2076                 if ($locked) {
2077                         DI::lock()->release('item_insert_activity');
2078                 }
2079                 return true;
2080         }
2081
2082         /**
2083          * 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                 $locked = DI::lock()->acquire('item_insert_content');
2101                 if (!$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                         DI::lock()->release('item_insert_content');
2119                 }
2120         }
2121
2122         /**
2123          * 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          * 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          * 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          * 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          * 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          * 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          * 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 DI::baseUrl()->get() . '/objects/' . $guid;
2511         }
2512
2513         /**
2514          * 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=".DI::baseUrl()."/search?tag=$2]$2[/url]", $item["body"]);
2592
2593                         $item["tag"] = preg_replace("/#\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",
2594                                         "#[url=".DI::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($tag, '[url=') || strlen($tag) < 2 || $tag[1] == '#') {
2619                                 continue;
2620                         }
2621
2622                         $basetag = str_replace('_',' ',substr($tag,1));
2623                         $newtag = '#[url=' . DI::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(DI::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(DI::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, &$datarray)
2750         {
2751                 if (!$contact['remote_self']) {
2752                         return false;
2753                 }
2754
2755                 // Prevent the forwarding of posts that are forwarded
2756                 if (!empty($datarray["extid"]) && ($datarray["extid"] == Protocol::DFRN)) {
2757                         Logger::log('Already forwarded', Logger::DEBUG);
2758                         return false;
2759                 }
2760
2761                 // Prevent to forward already forwarded posts
2762                 if ($datarray["app"] == DI::baseUrl()->getHostname()) {
2763                         Logger::log('Already forwarded (second test)', Logger::DEBUG);
2764                         return false;
2765                 }
2766
2767                 // Only forward posts
2768                 if ($datarray["verb"] != Activity::POST) {
2769                         Logger::log('No post', Logger::DEBUG);
2770                         return false;
2771                 }
2772
2773                 if (($contact['network'] != Protocol::FEED) && $datarray['private']) {
2774                         Logger::log('Not public', Logger::DEBUG);
2775                         return false;
2776                 }
2777
2778                 $datarray2 = $datarray;
2779                 Logger::log('remote-self start - Contact '.$contact['url'].' - '.$contact['remote_self'].' Item '.print_r($datarray, true), Logger::DEBUG);
2780                 if ($contact['remote_self'] == 2) {
2781                         $self = DBA::selectFirst('contact', ['id', 'name', 'url', 'thumb'],
2782                                         ['uid' => $contact['uid'], 'self' => true]);
2783                         if (DBA::isResult($self)) {
2784                                 $datarray['contact-id'] = $self["id"];
2785
2786                                 $datarray['owner-name'] = $self["name"];
2787                                 $datarray['owner-link'] = $self["url"];
2788                                 $datarray['owner-avatar'] = $self["thumb"];
2789
2790                                 $datarray['author-name']   = $datarray['owner-name'];
2791                                 $datarray['author-link']   = $datarray['owner-link'];
2792                                 $datarray['author-avatar'] = $datarray['owner-avatar'];
2793
2794                                 unset($datarray['edited']);
2795
2796                                 unset($datarray['network']);
2797                                 unset($datarray['owner-id']);
2798                                 unset($datarray['author-id']);
2799                         }
2800
2801                         if ($contact['network'] != Protocol::FEED) {
2802                                 $datarray["guid"] = System::createUUID();
2803                                 unset($datarray["plink"]);
2804                                 $datarray["uri"] = self::newURI($contact['uid'], $datarray["guid"]);
2805                                 $datarray["parent-uri"] = $datarray["uri"];
2806                                 $datarray["thr-parent"] = $datarray["uri"];
2807                                 $datarray["extid"] = Protocol::DFRN;
2808                                 $urlpart = parse_url($datarray2['author-link']);
2809                                 $datarray["app"] = $urlpart["host"];
2810                         } else {
2811                                 $datarray['private'] = 0;
2812                         }
2813                 }
2814
2815                 if ($contact['network'] != Protocol::FEED) {
2816                         // Store the original post
2817                         $result = self::insert($datarray2, false, false);
2818                         Logger::log('remote-self post original item - Contact '.$contact['url'].' return '.$result.' Item '.print_r($datarray2, true), Logger::DEBUG);
2819                 } else {
2820                         $datarray["app"] = "Feed";
2821                         $result = true;
2822                 }
2823
2824                 // Trigger automatic reactions for addons
2825                 $datarray['api_source'] = true;
2826
2827                 // We have to tell the hooks who we are - this really should be improved
2828                 $_SESSION["authenticated"] = true;
2829                 $_SESSION["uid"] = $contact['uid'];
2830
2831                 return $result;
2832         }
2833
2834         /**
2835          *
2836          * @param string $s
2837          * @param int    $uid
2838          * @param array  $item
2839          * @param int    $cid
2840          * @return string
2841          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
2842          * @throws \ImagickException
2843          */
2844         public static function fixPrivatePhotos($s, $uid, $item = null, $cid = 0)
2845         {
2846                 if (Config::get('system', 'disable_embedded')) {
2847                         return $s;
2848                 }
2849
2850                 Logger::log('check for photos', Logger::DEBUG);
2851                 $site = substr(DI::baseUrl(), strpos(DI::baseUrl(), '://'));
2852
2853                 $orig_body = $s;
2854                 $new_body = '';
2855
2856                 $img_start = strpos($orig_body, '[img');
2857                 $img_st_close = ($img_start !== false ? strpos(substr($orig_body, $img_start), ']') : false);
2858                 $img_len = ($img_start !== false ? strpos(substr($orig_body, $img_start + $img_st_close + 1), '[/img]') : false);
2859
2860                 while (($img_st_close !== false) && ($img_len !== false)) {
2861                         $img_st_close++; // make it point to AFTER the closing bracket
2862                         $image = substr($orig_body, $img_start + $img_st_close, $img_len);
2863
2864                         Logger::log('found photo ' . $image, Logger::DEBUG);
2865
2866                         if (stristr($image, $site . '/photo/')) {
2867                                 // Only embed locally hosted photos
2868                                 $replace = false;
2869                                 $i = basename($image);
2870                                 $i = str_replace(['.jpg', '.png', '.gif'], ['', '', ''], $i);
2871                                 $x = strpos($i, '-');
2872
2873                                 if ($x) {
2874                                         $res = substr($i, $x + 1);
2875                                         $i = substr($i, 0, $x);
2876                                         $photo = Photo::getPhotoForUser($uid, $i, $res);
2877                                         if (DBA::isResult($photo)) {
2878                                                 /*
2879                                                  * Check to see if we should replace this photo link with an embedded image
2880                                                  * 1. No need to do so if the photo is public
2881                                                  * 2. If there's a contact-id provided, see if they're in the access list
2882                                                  *    for the photo. If so, embed it.
2883                                                  * 3. Otherwise, if we have an item, see if the item permissions match the photo
2884                                                  *    permissions, regardless of order but first check to see if they're an exact
2885                                                  *    match to save some processing overhead.
2886                                                  */
2887                                                 if (self::hasPermissions($photo)) {
2888                                                         if ($cid) {
2889                                                                 $recips = self::enumeratePermissions($photo);
2890                                                                 if (in_array($cid, $recips)) {
2891                                                                         $replace = true;
2892                                                                 }
2893                                                         } elseif ($item) {
2894                                                                 if (self::samePermissions($uid, $item, $photo)) {
2895                                                                         $replace = true;
2896                                                                 }
2897                                                         }
2898                                                 }
2899                                                 if ($replace) {
2900                                                         $photo_img = Photo::getImageForPhoto($photo);
2901                                                         // If a custom width and height were specified, apply before embedding
2902                                                         if (preg_match("/\[img\=([0-9]*)x([0-9]*)\]/is", substr($orig_body, $img_start, $img_st_close), $match)) {
2903                                                                 Logger::log('scaling photo', Logger::DEBUG);
2904
2905                                                                 $width = intval($match[1]);
2906                                                                 $height = intval($match[2]);
2907
2908                                                                 $photo_img->scaleDown(max($width, $height));
2909                                                         }
2910
2911                                                         $data = $photo_img->asString();
2912                                                         $type = $photo_img->getType();
2913
2914                                                         Logger::log('replacing photo', Logger::DEBUG);
2915                                                         $image = 'data:' . $type . ';base64,' . base64_encode($data);
2916                                                         Logger::log('replaced: ' . $image, Logger::DATA);
2917                                                 }
2918                                         }
2919                                 }
2920                         }
2921
2922                         $new_body = $new_body . substr($orig_body, 0, $img_start + $img_st_close) . $image . '[/img]';
2923                         $orig_body = substr($orig_body, $img_start + $img_st_close + $img_len + strlen('[/img]'));
2924                         if ($orig_body === false) {
2925                                 $orig_body = '';
2926                         }
2927
2928                         $img_start = strpos($orig_body, '[img');
2929                         $img_st_close = ($img_start !== false ? strpos(substr($orig_body, $img_start), ']') : false);
2930                         $img_len = ($img_start !== false ? strpos(substr($orig_body, $img_start + $img_st_close + 1), '[/img]') : false);
2931                 }
2932
2933                 $new_body = $new_body . $orig_body;
2934
2935                 return $new_body;
2936         }
2937
2938         private static function hasPermissions($obj)
2939         {
2940                 return !empty($obj['allow_cid']) || !empty($obj['allow_gid']) ||
2941                         !empty($obj['deny_cid']) || !empty($obj['deny_gid']);
2942         }
2943
2944         private static function samePermissions($uid, $obj1, $obj2)
2945         {
2946                 // first part is easy. Check that these are exactly the same.
2947                 if (($obj1['allow_cid'] == $obj2['allow_cid'])
2948                         && ($obj1['allow_gid'] == $obj2['allow_gid'])
2949                         && ($obj1['deny_cid'] == $obj2['deny_cid'])
2950                         && ($obj1['deny_gid'] == $obj2['deny_gid'])) {
2951                         return true;
2952                 }
2953
2954                 // This is harder. Parse all the permissions and compare the resulting set.
2955                 $recipients1 = self::enumeratePermissions($obj1);
2956                 $recipients2 = self::enumeratePermissions($obj2);
2957                 sort($recipients1);
2958                 sort($recipients2);
2959
2960                 /// @TODO Comparison of arrays, maybe use array_diff_assoc() here?
2961                 return ($recipients1 == $recipients2);
2962         }
2963
2964         /**
2965          * Returns an array of contact-ids that are allowed to see this object
2966          *
2967          * @param array $obj        Item array with at least uid, allow_cid, allow_gid, deny_cid and deny_gid
2968          * @param bool  $check_dead Prunes unavailable contacts from the result
2969          * @return array
2970          * @throws \Exception
2971          */
2972         public static function enumeratePermissions(array $obj, bool $check_dead = false)
2973         {
2974                 $aclFormater = DI::aclFormatter();
2975
2976                 $allow_people = $aclFormater->expand($obj['allow_cid']);
2977                 $allow_groups = Group::expand($obj['uid'], $aclFormater->expand($obj['allow_gid']), $check_dead);
2978                 $deny_people  = $aclFormater->expand($obj['deny_cid']);
2979                 $deny_groups  = Group::expand($obj['uid'], $aclFormater->expand($obj['deny_gid']), $check_dead);
2980                 $recipients   = array_unique(array_merge($allow_people, $allow_groups));
2981                 $deny         = array_unique(array_merge($deny_people, $deny_groups));
2982                 $recipients   = array_diff($recipients, $deny);
2983                 return $recipients;
2984         }
2985
2986         public static function getFeedTags($item)
2987         {
2988                 $ret = [];
2989                 $matches = false;
2990                 $cnt = preg_match_all('|\#\[url\=(.*?)\](.*?)\[\/url\]|', $item['tag'], $matches);
2991                 if ($cnt) {
2992                         for ($x = 0; $x < $cnt; $x ++) {
2993                                 if ($matches[1][$x]) {
2994                                         $ret[$matches[2][$x]] = ['#', $matches[1][$x], $matches[2][$x]];
2995                                 }
2996                         }
2997                 }
2998                 $matches = false;
2999                 $cnt = preg_match_all('|\@\[url\=(.*?)\](.*?)\[\/url\]|', $item['tag'], $matches);
3000                 if ($cnt) {
3001                         for ($x = 0; $x < $cnt; $x ++) {
3002                                 if ($matches[1][$x]) {
3003                                         $ret[] = ['@', $matches[1][$x], $matches[2][$x]];
3004                                 }
3005                         }
3006                 }
3007                 return $ret;
3008         }
3009
3010         public static function expire($uid, $days, $network = "", $force = false)
3011         {
3012                 if (!$uid || ($days < 1)) {
3013                         return;
3014                 }
3015
3016                 $condition = ["`uid` = ? AND NOT `deleted` AND `id` = `parent` AND `gravity` = ?",
3017                         $uid, GRAVITY_PARENT];
3018
3019                 /*
3020                  * $expire_network_only = save your own wall posts
3021                  * and just expire conversations started by others
3022                  */
3023                 $expire_network_only = DI::pConfig()->get($uid, 'expire', 'network_only', false);
3024
3025                 if ($expire_network_only) {
3026                         $condition[0] .= " AND NOT `wall`";
3027                 }
3028
3029                 if ($network != "") {
3030                         $condition[0] .= " AND `network` = ?";
3031                         $condition[] = $network;
3032                 }
3033
3034                 $condition[0] .= " AND `received` < UTC_TIMESTAMP() - INTERVAL ? DAY";
3035                 $condition[] = $days;
3036
3037                 $items = self::select(['file', 'resource-id', 'starred', 'type', 'id', 'post-type'], $condition);
3038
3039                 if (!DBA::isResult($items)) {
3040                         return;
3041                 }
3042
3043                 $expire_items = DI::pConfig()->get($uid, 'expire', 'items', true);
3044
3045                 // Forcing expiring of items - but not notes and marked items
3046                 if ($force) {
3047                         $expire_items = true;
3048                 }
3049
3050                 $expire_notes = DI::pConfig()->get($uid, 'expire', 'notes', true);
3051                 $expire_starred = DI::pConfig()->get($uid, 'expire', 'starred', true);
3052                 $expire_photos = DI::pConfig()->get($uid, 'expire', 'photos', false);
3053
3054                 $expired = 0;
3055
3056                 while ($item = Item::fetch($items)) {
3057                         // don't expire filed items
3058
3059                         if (strpos($item['file'], '[') !== false) {
3060                                 continue;
3061                         }
3062
3063                         // Only expire posts, not photos and photo comments
3064
3065                         if (!$expire_photos && strlen($item['resource-id'])) {
3066                                 continue;
3067                         } elseif (!$expire_starred && intval($item['starred'])) {
3068                                 continue;
3069                         } elseif (!$expire_notes && (($item['type'] == 'note') || ($item['post-type'] == Item::PT_PERSONAL_NOTE))) {
3070                                 continue;
3071                         } elseif (!$expire_items && ($item['type'] != 'note') && ($item['post-type'] != Item::PT_PERSONAL_NOTE)) {
3072                                 continue;
3073                         }
3074
3075                         self::deleteById($item['id'], PRIORITY_LOW);
3076
3077                         ++$expired;
3078                 }
3079                 DBA::close($items);
3080                 Logger::log('User ' . $uid . ": expired $expired items; expire items: $expire_items, expire notes: $expire_notes, expire starred: $expire_starred, expire photos: $expire_photos");
3081         }
3082
3083         public static function firstPostDate($uid, $wall = false)
3084         {
3085                 $condition = ['uid' => $uid, 'wall' => $wall, 'deleted' => false, 'visible' => true, 'moderated' => false];
3086                 $params = ['order' => ['received' => false]];
3087                 $thread = DBA::selectFirst('thread', ['received'], $condition, $params);
3088                 if (DBA::isResult($thread)) {
3089                         return substr(DateTimeFormat::local($thread['received']), 0, 10);
3090                 }
3091                 return false;
3092         }
3093
3094         /**
3095          * add/remove activity to an item
3096          *
3097          * Toggle activities as like,dislike,attend of an item
3098          *
3099          * @param string $item_id
3100          * @param string $verb
3101          *            Activity verb. One of
3102          *            like, unlike, dislike, undislike, attendyes, unattendyes,
3103          *            attendno, unattendno, attendmaybe, unattendmaybe
3104          * @return bool
3105          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
3106          * @throws \ImagickException
3107          * @hook  'post_local_end'
3108          *            array $arr
3109          *            'post_id' => ID of posted item
3110          */
3111         public static function performLike($item_id, $verb)
3112         {
3113                 if (!Session::isAuthenticated()) {
3114                         return false;
3115                 }
3116
3117                 switch ($verb) {
3118                         case 'like':
3119                         case 'unlike':
3120                                 $activity = Activity::LIKE;
3121                                 break;
3122                         case 'dislike':
3123                         case 'undislike':
3124                                 $activity = Activity::DISLIKE;
3125                                 break;
3126                         case 'attendyes':
3127                         case 'unattendyes':
3128                                 $activity = Activity::ATTEND;
3129                                 break;
3130                         case 'attendno':
3131                         case 'unattendno':
3132                                 $activity = Activity::ATTENDNO;
3133                                 break;
3134                         case 'attendmaybe':
3135                         case 'unattendmaybe':
3136                                 $activity = Activity::ATTENDMAYBE;
3137                                 break;
3138                         default:
3139                                 Logger::log('like: unknown verb ' . $verb . ' for item ' . $item_id);
3140                                 return false;
3141                 }
3142
3143                 // Enable activity toggling instead of on/off
3144                 $event_verb_flag = $activity === Activity::ATTEND || $activity === Activity::ATTENDNO || $activity === Activity::ATTENDMAYBE;
3145
3146                 Logger::log('like: verb ' . $verb . ' item ' . $item_id);
3147
3148                 $item = self::selectFirst(self::ITEM_FIELDLIST, ['`id` = ? OR `uri` = ?', $item_id, $item_id]);
3149                 if (!DBA::isResult($item)) {
3150                         Logger::log('like: unknown item ' . $item_id);
3151                         return false;
3152                 }
3153
3154                 $item_uri = $item['uri'];
3155
3156                 $uid = $item['uid'];
3157                 if (($uid == 0) && local_user()) {
3158                         $uid = local_user();
3159                 }
3160
3161                 if (!Security::canWriteToUserWall($uid)) {
3162                         Logger::log('like: unable to write on wall ' . $uid);
3163                         return false;
3164                 }
3165
3166                 // Retrieves the local post owner
3167                 $owner_self_contact = DBA::selectFirst('contact', [], ['uid' => $uid, 'self' => true]);
3168                 if (!DBA::isResult($owner_self_contact)) {
3169                         Logger::log('like: unknown owner ' . $uid);
3170                         return false;
3171                 }
3172
3173                 // Retrieve the current logged in user's public contact
3174                 $author_id = public_contact();
3175
3176                 $author_contact = DBA::selectFirst('contact', ['url'], ['id' => $author_id]);
3177                 if (!DBA::isResult($author_contact)) {
3178                         Logger::log('like: unknown author ' . $author_id);
3179                         return false;
3180                 }
3181
3182                 // Contact-id is the uid-dependant author contact
3183                 if (local_user() == $uid) {
3184                         $item_contact_id = $owner_self_contact['id'];
3185                 } else {
3186                         $item_contact_id = Contact::getIdForURL($author_contact['url'], $uid, true);
3187                         $item_contact = DBA::selectFirst('contact', [], ['id' => $item_contact_id]);
3188                         if (!DBA::isResult($item_contact)) {
3189                                 Logger::log('like: unknown item contact ' . $item_contact_id);
3190                                 return false;
3191                         }
3192                 }
3193
3194                 // Look for an existing verb row
3195                 // event participation are essentially radio toggles. If you make a subsequent choice,
3196                 // we need to eradicate your first choice.
3197                 if ($event_verb_flag) {
3198                         $verbs = [Activity::ATTEND, Activity::ATTENDNO, Activity::ATTENDMAYBE];
3199
3200                         // Translate to the index based activity index
3201                         $activities = [];
3202                         foreach ($verbs as $verb) {
3203                                 $activities[] = self::activityToIndex($verb);
3204                         }
3205                 } else {
3206                         $activities = self::activityToIndex($activity);
3207                 }
3208
3209                 $condition = ['activity' => $activities, 'deleted' => false, 'gravity' => GRAVITY_ACTIVITY,
3210                         'author-id' => $author_id, 'uid' => $item['uid'], 'thr-parent' => $item_uri];
3211
3212                 $like_item = self::selectFirst(['id', 'guid', 'verb'], $condition);
3213
3214                 // If it exists, mark it as deleted
3215                 if (DBA::isResult($like_item)) {
3216                         self::deleteById($like_item['id']);
3217
3218                         if (!$event_verb_flag || $like_item['verb'] == $activity) {
3219                                 return true;
3220                         }
3221                 }
3222
3223                 // Verb is "un-something", just trying to delete existing entries
3224                 if (strpos($verb, 'un') === 0) {
3225                         return true;
3226                 }
3227
3228                 $objtype = $item['resource-id'] ? Activity\ObjectType::IMAGE : Activity\ObjectType::NOTE;
3229
3230                 $new_item = [
3231                         'guid'          => System::createUUID(),
3232                         'uri'           => self::newURI($item['uid']),
3233                         'uid'           => $item['uid'],
3234                         'contact-id'    => $item_contact_id,
3235                         'wall'          => $item['wall'],
3236                         'origin'        => 1,
3237                         'network'       => Protocol::DFRN,
3238                         'gravity'       => GRAVITY_ACTIVITY,
3239                         'parent'        => $item['id'],
3240                         'parent-uri'    => $item['uri'],
3241                         'thr-parent'    => $item['uri'],
3242                         'owner-id'      => $author_id,
3243                         'author-id'     => $author_id,
3244                         'body'          => $activity,
3245                         'verb'          => $activity,
3246                         'object-type'   => $objtype,
3247                         'allow_cid'     => $item['allow_cid'],
3248                         'allow_gid'     => $item['allow_gid'],
3249                         'deny_cid'      => $item['deny_cid'],
3250                         'deny_gid'      => $item['deny_gid'],
3251                         'visible'       => 1,
3252                         'unseen'        => 1,
3253                 ];
3254
3255                 $signed = Diaspora::createLikeSignature($uid, $new_item);
3256                 if (!empty($signed)) {
3257                         $new_item['diaspora_signed_text'] = json_encode($signed);
3258                 }
3259
3260                 $new_item_id = self::insert($new_item);
3261
3262                 // If the parent item isn't visible then set it to visible
3263                 if (!$item['visible']) {
3264                         self::update(['visible' => true], ['id' => $item['id']]);
3265                 }
3266
3267                 $new_item['id'] = $new_item_id;
3268
3269                 Hook::callAll('post_local_end', $new_item);
3270
3271                 return true;
3272         }
3273
3274         private static function addThread($itemid, $onlyshadow = false)
3275         {
3276                 $fields = ['uid', 'created', 'edited', 'commented', 'received', 'changed', 'wall', 'private', 'pubmail',
3277                         'moderated', 'visible', 'starred', 'contact-id', 'post-type',
3278                         'deleted', 'origin', 'forum_mode', 'mention', 'network', 'author-id', 'owner-id'];
3279                 $condition = ["`id` = ? AND (`parent` = ? OR `parent` = 0)", $itemid, $itemid];
3280                 $item = self::selectFirst($fields, $condition);
3281
3282                 if (!DBA::isResult($item)) {
3283                         return;
3284                 }
3285
3286                 $item['iid'] = $itemid;
3287
3288                 if (!$onlyshadow) {
3289                         $result = DBA::insert('thread', $item);
3290
3291                         Logger::log("Add thread for item ".$itemid." - ".print_r($result, true), Logger::DEBUG);
3292                 }
3293         }
3294
3295         private static function updateThread($itemid, $setmention = false)
3296         {
3297                 $fields = ['uid', 'guid', 'created', 'edited', 'commented', 'received', 'changed', 'post-type',
3298                         'wall', 'private', 'pubmail', 'moderated', 'visible', 'starred', 'contact-id',
3299                         'deleted', 'origin', 'forum_mode', 'network', 'author-id', 'owner-id'];
3300                 $condition = ["`id` = ? AND (`parent` = ? OR `parent` = 0)", $itemid, $itemid];
3301
3302                 $item = self::selectFirst($fields, $condition);
3303                 if (!DBA::isResult($item)) {
3304                         return;
3305                 }
3306
3307                 if ($setmention) {
3308                         $item["mention"] = 1;
3309                 }
3310
3311                 $fields = [];
3312
3313                 foreach ($item as $field => $data) {
3314                         if (!in_array($field, ["guid"])) {
3315                                 $fields[$field] = $data;
3316                         }
3317                 }
3318
3319                 $result = DBA::update('thread', $fields, ['iid' => $itemid]);
3320
3321                 Logger::log("Update thread for item ".$itemid." - guid ".$item["guid"]." - ".(int)$result, Logger::DEBUG);
3322         }
3323
3324         private static function deleteThread($itemid, $itemuri = "")
3325         {
3326                 $item = DBA::selectFirst('thread', ['uid'], ['iid' => $itemid]);
3327                 if (!DBA::isResult($item)) {
3328                         Logger::log('No thread found for id '.$itemid, Logger::DEBUG);
3329                         return;
3330                 }
3331
3332                 $result = DBA::delete('thread', ['iid' => $itemid], ['cascade' => false]);
3333
3334                 Logger::log("deleteThread: Deleted thread for item ".$itemid." - ".print_r($result, true), Logger::DEBUG);
3335
3336                 if ($itemuri != "") {
3337                         $condition = ["`uri` = ? AND NOT `deleted` AND NOT (`uid` IN (?, 0))", $itemuri, $item["uid"]];
3338                         if (!self::exists($condition)) {
3339                                 DBA::delete('item', ['uri' => $itemuri, 'uid' => 0]);
3340                                 Logger::log("deleteThread: Deleted shadow for item ".$itemuri, Logger::DEBUG);
3341                         }
3342                 }
3343         }
3344
3345         public static function getPermissionsSQLByUserId($owner_id)
3346         {
3347                 $local_user = local_user();
3348                 $remote_user = Session::getRemoteContactID($owner_id);
3349
3350                 /*
3351                  * Construct permissions
3352                  *
3353                  * default permissions - anonymous user
3354                  */
3355                 $sql = " AND NOT `item`.`private`";
3356
3357                 // Profile owner - everything is visible
3358                 if ($local_user && ($local_user == $owner_id)) {
3359                         $sql = '';
3360                 } elseif ($remote_user) {
3361                         /*
3362                          * Authenticated visitor. Unless pre-verified,
3363                          * check that the contact belongs to this $owner_id
3364                          * and load the groups the visitor belongs to.
3365                          * If pre-verified, the caller is expected to have already
3366                          * done this and passed the groups into this function.
3367                          */
3368                         $set = PermissionSet::get($owner_id, $remote_user);
3369
3370                         if (!empty($set)) {
3371                                 $sql_set = " OR (`item`.`private` IN (1,2) AND `item`.`wall` AND `item`.`psid` IN (" . implode(',', $set) . "))";
3372                         } else {
3373                                 $sql_set = '';
3374                         }
3375
3376                         $sql = " AND (NOT `item`.`private`" . $sql_set . ")";
3377                 }
3378
3379                 return $sql;
3380         }
3381
3382         /**
3383          * get translated item type
3384          *
3385          * @param $item
3386          * @return string
3387          */
3388         public static function postType($item)
3389         {
3390                 if (!empty($item['event-id'])) {
3391                         return DI::l10n()->t('event');
3392                 } elseif (!empty($item['resource-id'])) {
3393                         return DI::l10n()->t('photo');
3394                 } elseif (!empty($item['verb']) && $item['verb'] !== Activity::POST) {
3395                         return DI::l10n()->t('activity');
3396                 } elseif ($item['id'] != $item['parent']) {
3397                         return DI::l10n()->t('comment');
3398                 }
3399
3400                 return DI::l10n()->t('post');
3401         }
3402
3403         /**
3404          * Sets the "rendered-html" field of the provided item
3405          *
3406          * Body is preserved to avoid side-effects as we modify it just-in-time for spoilers and private image links
3407          *
3408          * @param array $item
3409          * @param bool  $update
3410          *
3411          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
3412          * @todo Remove reference, simply return "rendered-html" and "rendered-hash"
3413          */
3414         public static function putInCache(&$item, $update = false)
3415         {
3416                 $body = $item["body"];
3417
3418                 $rendered_hash = $item['rendered-hash'] ?? '';
3419                 $rendered_html = $item['rendered-html'] ?? '';
3420
3421                 if ($rendered_hash == ''
3422                         || $rendered_html == ""
3423                         || $rendered_hash != hash("md5", $item["body"])
3424                         || Config::get("system", "ignore_cache")
3425                 ) {
3426                         self::addRedirToImageTags($item);
3427
3428                         $item["rendered-html"] = BBCode::convert($item["body"]);
3429                         $item["rendered-hash"] = hash("md5", $item["body"]);
3430
3431                         $hook_data = ['item' => $item, 'rendered-html' => $item['rendered-html'], 'rendered-hash' => $item['rendered-hash']];
3432                         Hook::callAll('put_item_in_cache', $hook_data);
3433                         $item['rendered-html'] = $hook_data['rendered-html'];
3434                         $item['rendered-hash'] = $hook_data['rendered-hash'];
3435                         unset($hook_data);
3436
3437                         // Force an update if the generated values differ from the existing ones
3438                         if ($rendered_hash != $item["rendered-hash"]) {
3439                                 $update = true;
3440                         }
3441
3442                         // Only compare the HTML when we forcefully ignore the cache
3443                         if (Config::get("system", "ignore_cache") && ($rendered_html != $item["rendered-html"])) {
3444                                 $update = true;
3445                         }
3446
3447                         if ($update && !empty($item["id"])) {
3448                                 self::update(
3449                                         [
3450                                                 'rendered-html' => $item["rendered-html"],
3451                                                 'rendered-hash' => $item["rendered-hash"]
3452                                         ],
3453                                         ['id' => $item["id"]]
3454                                 );
3455                         }
3456                 }
3457
3458                 $item["body"] = $body;
3459         }
3460
3461         /**
3462          * Find any non-embedded images in private items and add redir links to them
3463          *
3464          * @param array &$item The field array of an item row
3465          */
3466         private static function addRedirToImageTags(array &$item)
3467         {
3468                 $app = DI::app();
3469
3470                 $matches = [];
3471                 $cnt = preg_match_all('|\[img\](http[^\[]*?/photo/[a-fA-F0-9]+?(-[0-9]\.[\w]+?)?)\[\/img\]|', $item['body'], $matches, PREG_SET_ORDER);
3472                 if ($cnt) {
3473                         foreach ($matches as $mtch) {
3474                                 if (strpos($mtch[1], '/redir') !== false) {
3475                                         continue;
3476                                 }
3477
3478                                 if ((local_user() == $item['uid']) && ($item['private'] == 1) && ($item['contact-id'] != $app->contact['id']) && ($item['network'] == Protocol::DFRN)) {
3479                                         $img_url = 'redir/' . $item['contact-id'] . '?url=' . urlencode($mtch[1]);
3480                                         $item['body'] = str_replace($mtch[0], '[img]' . $img_url . '[/img]', $item['body']);
3481                                 }
3482                         }
3483                 }
3484         }
3485
3486         /**
3487          * Given an item array, convert the body element from bbcode to html and add smilie icons.
3488          * If attach is true, also add icons for item attachments.
3489          *
3490          * @param array   $item
3491          * @param boolean $attach
3492          * @param boolean $is_preview
3493          * @return string item body html
3494          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
3495          * @throws \ImagickException
3496          * @hook  prepare_body_init item array before any work
3497          * @hook  prepare_body_content_filter ('item'=>item array, 'filter_reasons'=>string array) before first bbcode to html
3498          * @hook  prepare_body ('item'=>item array, 'html'=>body string, 'is_preview'=>boolean, 'filter_reasons'=>string array) after first bbcode to html
3499          * @hook  prepare_body_final ('item'=>item array, 'html'=>body string) after attach icons and blockquote special case handling (spoiler, author)
3500          */
3501         public static function prepareBody(array &$item, $attach = false, $is_preview = false)
3502         {
3503                 $a = DI::app();
3504                 Hook::callAll('prepare_body_init', $item);
3505
3506                 // In order to provide theme developers more possibilities, event items
3507                 // are treated differently.
3508                 if ($item['object-type'] === Activity\ObjectType::EVENT && isset($item['event-id'])) {
3509                         $ev = Event::getItemHTML($item);
3510                         return $ev;
3511                 }
3512
3513                 $tags = Term::populateTagsFromItem($item);
3514
3515                 $item['tags'] = $tags['tags'];
3516                 $item['hashtags'] = $tags['hashtags'];
3517                 $item['mentions'] = $tags['mentions'];
3518
3519                 // Compile eventual content filter reasons
3520                 $filter_reasons = [];
3521                 if (!$is_preview && public_contact() != $item['author-id']) {
3522                         if (!empty($item['content-warning']) && (!local_user() || !DI::pConfig()->get(local_user(), 'system', 'disable_cw', false))) {
3523                                 $filter_reasons[] = DI::l10n()->t('Content warning: %s', $item['content-warning']);
3524                         }
3525
3526                         $hook_data = [
3527                                 'item' => $item,
3528                                 'filter_reasons' => $filter_reasons
3529                         ];
3530                         Hook::callAll('prepare_body_content_filter', $hook_data);
3531                         $filter_reasons = $hook_data['filter_reasons'];
3532                         unset($hook_data);
3533                 }
3534
3535                 // Update the cached values if there is no "zrl=..." on the links.
3536                 $update = (!Session::isAuthenticated() && ($item["uid"] == 0));
3537
3538                 // Or update it if the current viewer is the intented viewer.
3539                 if (($item["uid"] == local_user()) && ($item["uid"] != 0)) {
3540                         $update = true;
3541                 }
3542
3543                 self::putInCache($item, $update);
3544                 $s = $item["rendered-html"];
3545
3546                 $hook_data = [
3547                         'item' => $item,
3548                         'html' => $s,
3549                         'preview' => $is_preview,
3550                         'filter_reasons' => $filter_reasons
3551                 ];
3552                 Hook::callAll('prepare_body', $hook_data);
3553                 $s = $hook_data['html'];
3554                 unset($hook_data);
3555
3556                 if (!$attach) {
3557                         // Replace the blockquotes with quotes that are used in mails.
3558                         $mailquote = '<blockquote type="cite" class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">';
3559                         $s = str_replace(['<blockquote>', '<blockquote class="spoiler">', '<blockquote class="author">'], [$mailquote, $mailquote, $mailquote], $s);
3560                         return $s;
3561                 }
3562
3563                 $as = '';
3564                 $vhead = false;
3565                 $matches = [];
3566                 preg_match_all('|\[attach\]href=\"(.*?)\" length=\"(.*?)\" type=\"(.*?)\"(?: title=\"(.*?)\")?|', $item['attach'], $matches, PREG_SET_ORDER);
3567                 foreach ($matches as $mtch) {
3568                         $mime = $mtch[3];
3569
3570                         $the_url = Contact::magicLinkById($item['author-id'], $mtch[1]);
3571
3572                         if (strpos($mime, 'video') !== false) {
3573                                 if (!$vhead) {
3574                                         $vhead = true;
3575                                         DI::page()['htmlhead'] .= Renderer::replaceMacros(Renderer::getMarkupTemplate('videos_head.tpl'));
3576                                 }
3577
3578                                 $url_parts = explode('/', $the_url);
3579                                 $id = end($url_parts);
3580                                 $as .= Renderer::replaceMacros(Renderer::getMarkupTemplate('video_top.tpl'), [
3581                                         '$video' => [
3582                                                 'id'     => $id,
3583                                                 'title'  => DI::l10n()->t('View Video'),
3584                                                 'src'    => $the_url,
3585                                                 'mime'   => $mime,
3586                                         ],
3587                                 ]);
3588                         }
3589
3590                         $filetype = strtolower(substr($mime, 0, strpos($mime, '/')));
3591                         if ($filetype) {
3592                                 $filesubtype = strtolower(substr($mime, strpos($mime, '/') + 1));
3593                                 $filesubtype = str_replace('.', '-', $filesubtype);
3594                         } else {
3595                                 $filetype = 'unkn';
3596                                 $filesubtype = 'unkn';
3597                         }
3598
3599                         $title = Strings::escapeHtml(trim(($mtch[4] ?? '') ?: $mtch[1]));
3600                         $title .= ' ' . $mtch[2] . ' ' . DI::l10n()->t('bytes');
3601
3602                         $icon = '<div class="attachtype icon s22 type-' . $filetype . ' subtype-' . $filesubtype . '"></div>';
3603                         $as .= '<a href="' . strip_tags($the_url) . '" title="' . $title . '" class="attachlink" target="_blank" >' . $icon . '</a>';
3604                 }
3605
3606                 if ($as != '') {
3607                         $s .= '<div class="body-attach">'.$as.'<div class="clear"></div></div>';
3608                 }
3609
3610                 // Map.
3611                 if (strpos($s, '<div class="map">') !== false && !empty($item['coord'])) {
3612                         $x = Map::byCoordinates(trim($item['coord']));
3613                         if ($x) {
3614                                 $s = preg_replace('/\<div class\=\"map\"\>/', '$0' . $x, $s);
3615                         }
3616                 }
3617
3618                 // Replace friendica image url size with theme preference.
3619                 if (!empty($a->theme_info['item_image_size'])) {
3620                         $ps = $a->theme_info['item_image_size'];
3621                         $s = preg_replace('|(<img[^>]+src="[^"]+/photo/[0-9a-f]+)-[0-9]|', "$1-" . $ps, $s);
3622                 }
3623
3624                 $s = HTML::applyContentFilter($s, $filter_reasons);
3625
3626                 $hook_data = ['item' => $item, 'html' => $s];
3627                 Hook::callAll('prepare_body_final', $hook_data);
3628
3629                 return $hook_data['html'];
3630         }
3631
3632         /**
3633          * get private link for item
3634          *
3635          * @param array $item
3636          * @return boolean|array False if item has not plink, otherwise array('href'=>plink url, 'title'=>translated title)
3637          * @throws \Exception
3638          */
3639         public static function getPlink($item)
3640         {
3641                 $a = DI::app();
3642
3643                 if ($a->user['nickname'] != "") {
3644                         $ret = [
3645                                 'href' => "display/" . $item['guid'],
3646                                 'orig' => "display/" . $item['guid'],
3647                                 'title' => DI::l10n()->t('View on separate page'),
3648                                 'orig_title' => DI::l10n()->t('view on separate page'),
3649                         ];
3650
3651                         if (!empty($item['plink'])) {
3652                                 $ret["href"] = DI::baseUrl()->remove($item['plink']);
3653                                 $ret["title"] = DI::l10n()->t('link to source');
3654                         }
3655
3656                 } elseif (!empty($item['plink']) && ($item['private'] != 1)) {
3657                         $ret = [
3658                                 'href' => $item['plink'],
3659                                 'orig' => $item['plink'],
3660                                 'title' => DI::l10n()->t('link to source'),
3661                         ];
3662                 } else {
3663                         $ret = [];
3664                 }
3665
3666                 return $ret;
3667         }
3668
3669         /**
3670          * Is the given item array a post that is sent as starting post to a forum?
3671          *
3672          * @param array $item
3673          * @param array $owner
3674          *
3675          * @return boolean "true" when it is a forum post
3676          */
3677         public static function isForumPost(array $item, array $owner = [])
3678         {
3679                 if (empty($owner)) {
3680                         $owner = User::getOwnerDataById($item['uid']);
3681                         if (empty($owner)) {
3682                                 return false;
3683                         }
3684                 }
3685
3686                 if (($item['author-id'] == $item['owner-id']) ||
3687                         ($owner['id'] == $item['contact-id']) ||
3688                         ($item['uri'] != $item['parent-uri']) ||
3689                         $item['origin']) {
3690                         return false;
3691                 }
3692
3693                 return Contact::isForum($item['contact-id']);
3694         }
3695
3696         /**
3697          * Search item id for given URI or plink
3698          *
3699          * @param string $uri
3700          * @param integer $uid
3701          *
3702          * @return integer item id
3703          */
3704         public static function searchByLink($uri, $uid = 0)
3705         {
3706                 $ssl_uri = str_replace('http://', 'https://', $uri);
3707                 $uris = [$uri, $ssl_uri, Strings::normaliseLink($uri)];
3708
3709                 $item = DBA::selectFirst('item', ['id'], ['uri' => $uris, 'uid' => $uid]);
3710                 if (DBA::isResult($item)) {
3711                         return $item['id'];
3712                 }
3713
3714                 $itemcontent = DBA::selectFirst('item-content', ['uri-id'], ['plink' => $uris]);
3715                 if (!DBA::isResult($itemcontent)) {
3716                         return 0;
3717                 }
3718
3719                 $itemuri = DBA::selectFirst('item-uri', ['uri'], ['id' => $itemcontent['uri-id']]);
3720                 if (!DBA::isResult($itemuri)) {
3721                         return 0;
3722                 }
3723
3724                 $item = DBA::selectFirst('item', ['id'], ['uri' => $itemuri['uri'], 'uid' => $uid]);
3725                 if (DBA::isResult($item)) {
3726                         return $item['id'];
3727                 }
3728
3729                 return 0;
3730         }
3731
3732         /**
3733          * Fetches item for given URI or plink
3734          *
3735          * @param string $uri
3736          * @param integer $uid
3737          *
3738          * @return integer item id
3739          */
3740         public static function fetchByLink($uri, $uid = 0)
3741         {
3742                 $item_id = self::searchByLink($uri, $uid);
3743                 if (!empty($item_id)) {
3744                         return $item_id;
3745                 }
3746
3747                 if (ActivityPub\Processor::fetchMissingActivity($uri)) {
3748                         $item_id = self::searchByLink($uri, $uid);
3749                 } else {
3750                         $item_id = Diaspora::fetchByURL($uri);
3751                 }
3752
3753                 if (!empty($item_id)) {
3754                         return $item_id;
3755                 }
3756
3757                 return 0;
3758         }
3759
3760         /**
3761          * Return share data from an item array (if the item is shared item)
3762          * We are providing the complete Item array, because at some time in the future
3763          * we hopefully will define these values not in the body anymore but in some item fields.
3764          * This function is meant to replace all similar functions in the system.
3765          *
3766          * @param array $item
3767          *
3768          * @return array with share information
3769          */
3770         public static function getShareArray($item)
3771         {
3772                 if (!preg_match("/(.*?)\[share(.*?)\]\s?(.*?)\s?\[\/share\]\s?/ism", $item['body'], $matches)) {
3773                         return [];
3774                 }
3775
3776                 $attribute_string = $matches[2];
3777                 $attributes = ['comment' => trim($matches[1]), 'shared' => trim($matches[3])];
3778                 foreach (['author', 'profile', 'avatar', 'guid', 'posted', 'link'] as $field) {
3779                         if (preg_match("/$field=(['\"])(.+?)\\1/ism", $attribute_string, $matches)) {
3780                                 $attributes[$field] = trim(html_entity_decode($matches[2] ?? '', ENT_QUOTES, 'UTF-8'));
3781                         }
3782                 }
3783                 return $attributes;
3784         }
3785
3786         /**
3787          * Fetch item information for shared items from the original items and adds it.
3788          *
3789          * @param array $item
3790          *
3791          * @return array item array with data from the original item
3792          */
3793         public static function addShareDataFromOriginal($item)
3794         {
3795                 $shared = self::getShareArray($item);
3796                 if (empty($shared)) {
3797                         return $item;
3798                 }
3799
3800                 // Real reshares always have got a GUID.
3801                 if (empty($shared['guid'])) {
3802                         return $item;
3803                 }
3804
3805                 $uid = $item['uid'] ?? 0;
3806
3807                 // first try to fetch the item via the GUID. This will work for all reshares that had been created on this system
3808                 $shared_item = self::selectFirst(['title', 'body', 'attach'], ['guid' => $shared['guid'], 'uid' => [0, $uid]]);
3809                 if (!DBA::isResult($shared_item)) {
3810                         // Otherwhise try to find (and possibly fetch) the item via the link. This should work for Diaspora and ActivityPub posts
3811                         $id = self::fetchByLink($shared['link'], $uid);
3812                         if (empty($id)) {
3813                                 Logger::info('Original item not found', ['url' => $shared['link'], 'callstack' => System::callstack()]);
3814                                 return $item;
3815                         }
3816
3817                         $shared_item = self::selectFirst(['title', 'body', 'attach'], ['id' => $id]);
3818                         if (!DBA::isResult($shared_item)) {
3819                                 return $item;
3820                         }
3821                         Logger::info('Got shared data from url', ['url' => $shared['link'], 'callstack' => System::callstack()]);
3822                 } else {
3823                         Logger::info('Got shared data from guid', ['guid' => $shared['guid'], 'callstack' => System::callstack()]);
3824                 }
3825
3826                 if (!empty($shared_item['title'])) {
3827                         $body = '[h3]' . $shared_item['title'] . "[/h3]\n" . $shared_item['body'];
3828                         unset($shared_item['title']);
3829                 } else {
3830                         $body = $shared_item['body'];
3831                 }
3832
3833                 $item['body'] = preg_replace("/\[share ([^\[\]]*)\].*\[\/share\]/ism", '[share $1]' . $body . '[/share]', $item['body']);
3834                 unset($shared_item['body']);
3835
3836                 return array_merge($item, $shared_item);
3837         }
3838 }