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\Hook;
  12 use Friendica\Core\Logger;
  13 use Friendica\Core\Protocol;
  14 use Friendica\Core\Renderer;
  15 use Friendica\Core\Session;
  16 use Friendica\Core\System;
  17 use Friendica\Core\Worker;
  18 use Friendica\Database\DBA;
  19 use Friendica\DI;
  20 use Friendica\Protocol\Activity;
  21 use Friendica\Protocol\ActivityPub;
  22 use Friendica\Protocol\Diaspora;
  23 use Friendica\Protocol\OStatus;
  24 use Friendica\Util\DateTimeFormat;
  25 use Friendica\Util\Map;
  26 use Friendica\Util\Network;
  27 use Friendica\Util\Security;
  28 use Friendica\Util\Strings;
  29 use Friendica\Util\XML;
  30 use Friendica\Worker\Delivery;
  31 use Text_LanguageDetect;
  32
  33 class Item
  34 {
  35         // Posting types, inspired by https://www.w3.org/TR/activitystreams-vocabulary/#object-types
  36         const PT_ARTICLE = 0;
  37         const PT_NOTE = 1;
  38         const PT_PAGE = 2;
  39         const PT_IMAGE = 16;
  40         const PT_AUDIO = 17;
  41         const PT_VIDEO = 18;
  42         const PT_DOCUMENT = 19;
  43         const PT_EVENT = 32;
  44         const PT_PERSONAL_NOTE = 128;
  45
  46         // Field list that is used to display the items
  47         const DISPLAY_FIELDLIST = [
  48                 'uid', 'id', 'parent', 'uri', 'thr-parent', 'parent-uri', 'guid', 'network', 'gravity',
  49                 'commented', 'created', 'edited', 'received', 'verb', 'object-type', 'postopts', 'plink',
  50                 'wall', 'private', 'starred', 'origin', 'title', 'body', 'file', 'attach', 'language',
  51                 'content-warning', 'location', 'coord', 'app', 'rendered-hash', 'rendered-html', 'object',
  52                 'allow_cid', 'allow_gid', 'deny_cid', 'deny_gid', 'item_id',
  53                 'author-id', 'author-link', 'author-name', 'author-avatar', 'author-network',
  54                 'owner-id', 'owner-link', 'owner-name', 'owner-avatar', 'owner-network',
  55                 'contact-id', 'contact-uid', 'contact-link', 'contact-name', 'contact-avatar',
  56                 'writable', 'self', 'cid', 'alias', 'pinned',
  57                 'event-id', 'event-created', 'event-edited', 'event-start', 'event-finish',
  58                 'event-summary', 'event-desc', 'event-location', 'event-type',
  59                 'event-nofinish', 'event-adjust', 'event-ignore', 'event-id',
  60                 'delivery_queue_count', 'delivery_queue_done', 'delivery_queue_failed'
  61         ];
  62
  63         // Field list that is used to deliver items via the protocols
  64         const DELIVER_FIELDLIST = ['uid', 'id', 'parent', 'uri', 'thr-parent', 'parent-uri', 'guid',
  65                         'parent-guid', 'created', 'edited', 'verb', 'object-type', 'object', 'target',
  66                         'private', 'title', 'body', 'location', 'coord', 'app',
  67                         'attach', 'tag', 'deleted', 'extid', 'post-type',
  68                         'allow_cid', 'allow_gid', 'deny_cid', 'deny_gid',
  69                         'author-id', 'author-link', 'owner-link', 'contact-uid',
  70                         'signed_text', 'signature', 'signer', 'network'];
  71
  72         // Field list for "item-content" table that is mixed with the item table
  73         const MIXED_CONTENT_FIELDLIST = ['title', 'content-warning', 'body', 'location',
  74                         'coord', 'app', 'rendered-hash', 'rendered-html', 'verb',
  75                         'object-type', 'object', 'target-type', 'target', 'plink'];
  76
  77         // Field list for "item-content" table that is not present in the "item" table
  78         const CONTENT_FIELDLIST = ['language'];
  79
  80         // All fields in the item table
  81         const ITEM_FIELDLIST = ['id', 'uid', 'parent', 'uri', 'parent-uri', 'thr-parent', 'guid',
  82                         'contact-id', 'type', 'wall', 'gravity', 'extid', 'icid', 'iaid', 'psid',
  83                         'created', 'edited', 'commented', 'received', 'changed', 'verb',
  84                         'postopts', 'plink', 'resource-id', 'event-id', 'tag', 'attach', 'inform',
  85                         'file', 'allow_cid', 'allow_gid', 'deny_cid', 'deny_gid', 'post-type',
  86                         'private', 'pubmail', 'moderated', 'visible', 'starred', 'bookmark',
  87                         'unseen', 'deleted', 'origin', 'forum_mode', 'mention', 'global', 'network',
  88                         'title', 'content-warning', 'body', 'location', 'coord', 'app',
  89                         'rendered-hash', 'rendered-html', 'object-type', 'object', 'target-type', 'target',
  90                         'author-id', 'author-link', 'author-name', 'author-avatar', 'author-network',
  91                         'owner-id', 'owner-link', 'owner-name', 'owner-avatar'];
  92
  93         // Never reorder or remove entries from this list. Just add new ones at the end, if needed.
  94         // The item-activity table only stores the index and needs this array to know the matching activity.
  95         const ACTIVITIES = [
  96                 Activity::LIKE, Activity::DISLIKE,
  97                 Activity::ATTEND, Activity::ATTENDNO, Activity::ATTENDMAYBE,
  98                 Activity::FOLLOW,
  99                 Activity::ANNOUNCE];
 100
 101         private static $legacy_mode = null;
 102
 103         public static function isLegacyMode()
 104         {
 105                 if (is_null(self::$legacy_mode)) {
 106                         self::$legacy_mode = (DI::config()->get("system", "post_update_version") < 1279);
 107                 }
 108
 109                 return self::$legacy_mode;
 110         }
 111
 112         /**
 113          * Set the pinned state of an item
 114          *
 115          * @param integer $iid    Item ID
 116          * @param integer $uid    User ID
 117          * @param boolean $pinned Pinned state
 118          */
 119         public static function setPinned(int $iid, int $uid, bool $pinned)
 120         {
 121                 DBA::update('user-item', ['pinned' => $pinned], ['iid' => $iid, 'uid' => $uid], true);
 122         }
 123
 124         /**
 125          * Get the pinned state
 126          *
 127          * @param integer $iid Item ID
 128          * @param integer $uid User ID
 129          *
 130          * @return boolean pinned state
 131          */
 132         public static function getPinned(int $iid, int $uid)
 133         {
 134                 $useritem = DBA::selectFirst('user-item', ['pinned'], ['iid' => $iid, 'uid' => $uid]);
 135                 if (!DBA::isResult($useritem)) {
 136                         return false;
 137                 }
 138                 return (bool)$useritem['pinned'];
 139         }
 140
 141         /**
 142          * Select pinned rows from the item table for a given user
 143          *
 144          * @param integer $uid       User ID
 145          * @param array   $selected  Array of selected fields, empty for all
 146          * @param array   $condition Array of fields for condition
 147          * @param array   $params    Array of several parameters
 148          *
 149          * @return boolean|object
 150          * @throws \Exception
 151          */
 152         public static function selectPinned(int $uid, array $selected = [], array $condition = [], $params = [])
 153         {
 154                 $useritems = DBA::select('user-item', ['iid'], ['uid' => $uid, 'pinned' => true]);
 155                 if (!DBA::isResult($useritems)) {
 156                         return $useritems;
 157                 }
 158
 159                 $pinned = [];
 160                 while ($useritem = self::fetch($useritems)) {
 161                         $pinned[] = $useritem['iid'];
 162                 }
 163                 DBA::close($useritems);
 164
 165                 if (empty($pinned)) {
 166                         return [];
 167                 }
 168
 169                 if (empty($condition) || !is_array($condition)) {
 170                         $condition = ['iid' => $pinned];
 171                 } else {
 172                         reset($condition);
 173                         $first_key = key($condition);
 174                         if (!is_int($first_key)) {
 175                                 $condition['iid'] = $pinned;
 176                         } else {
 177                                 $values_string = substr(str_repeat("?, ", count($pinned)), 0, -2);
 178                                 $condition[0] = '(' . $condition[0] . ") AND `iid` IN (" . $values_string . ")";
 179                                 $condition = array_merge($condition, $pinned);
 180                         }
 181                 }
 182
 183                 return self::selectThreadForUser($uid, $selected, $condition, $params);
 184         }
 185
 186         /**
 187          * returns an activity index from an activity string
 188          *
 189          * @param string $activity activity string
 190          * @return integer Activity index
 191          */
 192         public static function activityToIndex($activity)
 193         {
 194                 $index = array_search($activity, self::ACTIVITIES);
 195
 196                 if (is_bool($index)) {
 197                         $index = -1;
 198                 }
 199
 200                 return $index;
 201         }
 202
 203         /**
 204          * returns an activity string from an activity index
 205          *
 206          * @param integer $index activity index
 207          * @return string Activity string
 208          */
 209         private static function indexToActivity($index)
 210         {
 211                 if (is_null($index) || !array_key_exists($index, self::ACTIVITIES)) {
 212                         return '';
 213                 }
 214
 215                 return self::ACTIVITIES[$index];
 216         }
 217
 218         /**
 219          * Fetch a single item row
 220          *
 221          * @param mixed $stmt statement object
 222          * @return array current row
 223          */
 224         public static function fetch($stmt)
 225         {
 226                 $row = DBA::fetch($stmt);
 227
 228                 if (is_bool($row)) {
 229                         return $row;
 230                 }
 231
 232                 // ---------------------- Transform item structure data ----------------------
 233
 234                 // We prefer the data from the user's contact over the public one
 235                 if (!empty($row['author-link']) && !empty($row['contact-link']) &&
 236                         ($row['author-link'] == $row['contact-link'])) {
 237                         if (isset($row['author-avatar']) && !empty($row['contact-avatar'])) {
 238                                 $row['author-avatar'] = $row['contact-avatar'];
 239                         }
 240                         if (isset($row['author-name']) && !empty($row['contact-name'])) {
 241                                 $row['author-name'] = $row['contact-name'];
 242                         }
 243                 }
 244
 245                 if (!empty($row['owner-link']) && !empty($row['contact-link']) &&
 246                         ($row['owner-link'] == $row['contact-link'])) {
 247                         if (isset($row['owner-avatar']) && !empty($row['contact-avatar'])) {
 248                                 $row['owner-avatar'] = $row['contact-avatar'];
 249                         }
 250                         if (isset($row['owner-name']) && !empty($row['contact-name'])) {
 251                                 $row['owner-name'] = $row['contact-name'];
 252                         }
 253                 }
 254
 255                 // We can always comment on posts from these networks
 256                 if (array_key_exists('writable', $row) &&
 257                         in_array($row['internal-network'], Protocol::FEDERATED)) {
 258                         $row['writable'] = true;
 259                 }
 260
 261                 // ---------------------- Transform item content data ----------------------
 262
 263                 // Fetch data from the item-content table whenever there is content there
 264                 if (self::isLegacyMode()) {
 265                         $legacy_fields = array_merge(ItemDeliveryData::LEGACY_FIELD_LIST, self::MIXED_CONTENT_FIELDLIST);
 266                         foreach ($legacy_fields as $field) {
 267                                 if (empty($row[$field]) && !empty($row['internal-item-' . $field])) {
 268                                         $row[$field] = $row['internal-item-' . $field];
 269                                 }
 270                                 unset($row['internal-item-' . $field]);
 271                         }
 272                 }
 273
 274                 if (!empty($row['internal-iaid']) && array_key_exists('verb', $row)) {
 275                         $row['verb'] = self::indexToActivity($row['internal-activity']);
 276                         if (array_key_exists('title', $row)) {
 277                                 $row['title'] = '';
 278                         }
 279                         if (array_key_exists('body', $row)) {
 280                                 $row['body'] = $row['verb'];
 281                         }
 282                         if (array_key_exists('object', $row)) {
 283                                 $row['object'] = '';
 284                         }
 285                         if (array_key_exists('object-type', $row)) {
 286                                 $row['object-type'] = Activity\ObjectType::NOTE;
 287                         }
 288                 } elseif (array_key_exists('verb', $row) && in_array($row['verb'], ['', Activity::POST, Activity::SHARE])) {
 289                         // Posts don't have a target - but having tags or files.
 290                         // We safe some performance by building tag and file strings only here.
 291                         // We remove the target since they aren't used for this type.
 292                         // In mail posts we do store some mail header data in the object.
 293                         if (array_key_exists('target', $row)) {
 294                                 $row['target'] = '';
 295                         }
 296                 }
 297
 298                 if (!array_key_exists('verb', $row) || in_array($row['verb'], ['', Activity::POST, Activity::SHARE])) {
 299                         // Build the tag string out of the term entries
 300                         if (array_key_exists('tag', $row) && empty($row['tag'])) {
 301                                 $row['tag'] = Term::tagTextFromItemId($row['internal-iid']);
 302                         }
 303
 304                         // Build the file string out of the term entries
 305                         if (array_key_exists('file', $row) && empty($row['file'])) {
 306                                 $row['file'] = Term::fileTextFromItemId($row['internal-iid']);
 307                         }
 308                 }
 309
 310                 if (array_key_exists('signed_text', $row) && array_key_exists('interaction', $row) && !is_null($row['interaction'])) {
 311                         $row['signed_text'] = $row['interaction'];
 312                 }
 313
 314                 if (array_key_exists('ignored', $row) && array_key_exists('internal-user-ignored', $row) && !is_null($row['internal-user-ignored'])) {
 315                         $row['ignored'] = $row['internal-user-ignored'];
 316                 }
 317
 318                 // Remove internal fields
 319                 unset($row['internal-activity']);
 320                 unset($row['internal-network']);
 321                 unset($row['internal-iid']);
 322                 unset($row['internal-iaid']);
 323                 unset($row['internal-icid']);
 324                 unset($row['internal-user-ignored']);
 325                 unset($row['interaction']);
 326
 327                 return $row;
 328         }
 329
 330         /**
 331          * Fills an array with data from an item query
 332          *
 333          * @param object $stmt statement object
 334          * @param bool   $do_close
 335          * @return array Data array
 336          */
 337         public static function inArray($stmt, $do_close = true) {
 338                 if (is_bool($stmt)) {
 339                         return $stmt;
 340                 }
 341
 342                 $data = [];
 343                 while ($row = self::fetch($stmt)) {
 344                         $data[] = $row;
 345                 }
 346                 if ($do_close) {
 347                         DBA::close($stmt);
 348                 }
 349                 return $data;
 350         }
 351
 352         /**
 353          * Check if item data exists
 354          *
 355          * @param array $condition array of fields for condition
 356          *
 357          * @return boolean Are there rows for that condition?
 358          * @throws \Exception
 359          */
 360         public static function exists($condition) {
 361                 $stmt = self::select(['id'], $condition, ['limit' => 1]);
 362
 363                 if (is_bool($stmt)) {
 364                         $retval = $stmt;
 365                 } else {
 366                         $retval = (DBA::numRows($stmt) > 0);
 367                 }
 368
 369                 DBA::close($stmt);
 370
 371                 return $retval;
 372         }
 373
 374         /**
 375          * Retrieve a single record from the item table for a given user and returns it in an associative array
 376          *
 377          * @param integer $uid User ID
 378          * @param array   $selected
 379          * @param array   $condition
 380          * @param array   $params
 381          * @return bool|array
 382          * @throws \Exception
 383          * @see   DBA::select
 384          */
 385         public static function selectFirstForUser($uid, array $selected = [], array $condition = [], $params = [])
 386         {
 387                 $params['uid'] = $uid;
 388
 389                 if (empty($selected)) {
 390                         $selected = Item::DISPLAY_FIELDLIST;
 391                 }
 392
 393                 return self::selectFirst($selected, $condition, $params);
 394         }
 395
 396         /**
 397          * Select rows from the item table for a given user
 398          *
 399          * @param integer $uid       User ID
 400          * @param array   $selected  Array of selected fields, empty for all
 401          * @param array   $condition Array of fields for condition
 402          * @param array   $params    Array of several parameters
 403          *
 404          * @return boolean|object
 405          * @throws \Exception
 406          */
 407         public static function selectForUser($uid, array $selected = [], array $condition = [], $params = [])
 408         {
 409                 $params['uid'] = $uid;
 410
 411                 if (empty($selected)) {
 412                         $selected = Item::DISPLAY_FIELDLIST;
 413                 }
 414
 415                 return self::select($selected, $condition, $params);
 416         }
 417
 418         /**
 419          * Retrieve a single record from the item table and returns it in an associative array
 420          *
 421          * @param array $fields
 422          * @param array $condition
 423          * @param array $params
 424          * @return bool|array
 425          * @throws \Exception
 426          * @see   DBA::select
 427          */
 428         public static function selectFirst(array $fields = [], array $condition = [], $params = [])
 429         {
 430                 $params['limit'] = 1;
 431
 432                 $result = self::select($fields, $condition, $params);
 433
 434                 if (is_bool($result)) {
 435                         return $result;
 436                 } else {
 437                         $row = self::fetch($result);
 438                         DBA::close($result);
 439                         return $row;
 440                 }
 441         }
 442
 443         /**
 444          * Select rows from the item table and returns them as an array
 445          *
 446          * @param array $selected  Array of selected fields, empty for all
 447          * @param array $condition Array of fields for condition
 448          * @param array $params    Array of several parameters
 449          *
 450          * @return array
 451          * @throws \Exception
 452          */
 453         public static function selectToArray(array $fields = [], array $condition = [], $params = [])
 454         {
 455                 $result = self::select($fields, $condition, $params);
 456
 457                 if (is_bool($result)) {
 458                         return [];
 459                 }
 460
 461                 $data = [];
 462                 while ($row = self::fetch($result)) {
 463                         $data[] = $row;
 464                 }
 465                 DBA::close($result);
 466
 467                 return $data;
 468         }
 469
 470         /**
 471          * Select rows from the item table
 472          *
 473          * @param array $selected  Array of selected fields, empty for all
 474          * @param array $condition Array of fields for condition
 475          * @param array $params    Array of several parameters
 476          *
 477          * @return boolean|object
 478          * @throws \Exception
 479          */
 480         public static function select(array $selected = [], array $condition = [], $params = [])
 481         {
 482                 $uid = 0;
 483                 $usermode = false;
 484
 485                 if (isset($params['uid'])) {
 486                         $uid = $params['uid'];
 487                         $usermode = true;
 488                 }
 489
 490                 $fields = self::fieldlist($usermode);
 491
 492                 $select_fields = self::constructSelectFields($fields, $selected);
 493
 494                 $condition_string = DBA::buildCondition($condition);
 495
 496                 $condition_string = self::addTablesToFields($condition_string, $fields);
 497
 498                 if ($usermode) {
 499                         $condition_string = $condition_string . ' AND ' . self::condition(false);
 500                 }
 501
 502                 $param_string = self::addTablesToFields(DBA::buildParameter($params), $fields);
 503
 504                 $table = "`item` " . self::constructJoins($uid, $select_fields . $condition_string . $param_string, false, $usermode);
 505
 506                 $sql = "SELECT " . $select_fields . " FROM " . $table . $condition_string . $param_string;
 507
 508                 return DBA::p($sql, $condition);
 509         }
 510
 511         /**
 512          * Select rows from the starting post in the item table
 513          *
 514          * @param integer $uid       User ID
 515          * @param array   $selected
 516          * @param array   $condition Array of fields for condition
 517          * @param array   $params    Array of several parameters
 518          *
 519          * @return boolean|object
 520          * @throws \Exception
 521          */
 522         public static function selectThreadForUser($uid, array $selected = [], array $condition = [], $params = [])
 523         {
 524                 $params['uid'] = $uid;
 525
 526                 if (empty($selected)) {
 527                         $selected = Item::DISPLAY_FIELDLIST;
 528                 }
 529
 530                 return self::selectThread($selected, $condition, $params);
 531         }
 532
 533         /**
 534          * Retrieve a single record from the starting post in the item table and returns it in an associative array
 535          *
 536          * @param integer $uid User ID
 537          * @param array   $selected
 538          * @param array   $condition
 539          * @param array   $params
 540          * @return bool|array
 541          * @throws \Exception
 542          * @see   DBA::select
 543          */
 544         public static function selectFirstThreadForUser($uid, array $selected = [], array $condition = [], $params = [])
 545         {
 546                 $params['uid'] = $uid;
 547
 548                 if (empty($selected)) {
 549                         $selected = Item::DISPLAY_FIELDLIST;
 550                 }
 551
 552                 return self::selectFirstThread($selected, $condition, $params);
 553         }
 554
 555         /**
 556          * Retrieve a single record from the starting post in the item table and returns it in an associative array
 557          *
 558          * @param array $fields
 559          * @param array $condition
 560          * @param array $params
 561          * @return bool|array
 562          * @throws \Exception
 563          * @see   DBA::select
 564          */
 565         public static function selectFirstThread(array $fields = [], array $condition = [], $params = [])
 566         {
 567                 $params['limit'] = 1;
 568                 $result = self::selectThread($fields, $condition, $params);
 569
 570                 if (is_bool($result)) {
 571                         return $result;
 572                 } else {
 573                         $row = self::fetch($result);
 574                         DBA::close($result);
 575                         return $row;
 576                 }
 577         }
 578
 579         /**
 580          * Select rows from the starting post in the item table
 581          *
 582          * @param array $selected  Array of selected fields, empty for all
 583          * @param array $condition Array of fields for condition
 584          * @param array $params    Array of several parameters
 585          *
 586          * @return boolean|object
 587          * @throws \Exception
 588          */
 589         public static function selectThread(array $selected = [], array $condition = [], $params = [])
 590         {
 591                 $uid = 0;
 592                 $usermode = false;
 593
 594                 if (isset($params['uid'])) {
 595                         $uid = $params['uid'];
 596                         $usermode = true;
 597                 }
 598
 599                 $fields = self::fieldlist($usermode);
 600
 601                 $fields['thread'] = ['mention', 'ignored', 'iid'];
 602
 603                 $threadfields = ['thread' => ['iid', 'uid', 'contact-id', 'owner-id', 'author-id',
 604                         'created', 'edited', 'commented', 'received', 'changed', 'wall', 'private',
 605                         'pubmail', 'moderated', 'visible', 'starred', 'ignored', 'post-type',
 606                         'unseen', 'deleted', 'origin', 'forum_mode', 'mention', 'network']];
 607
 608                 $select_fields = self::constructSelectFields($fields, $selected);
 609
 610                 $condition_string = DBA::buildCondition($condition);
 611
 612                 $condition_string = self::addTablesToFields($condition_string, $threadfields);
 613                 $condition_string = self::addTablesToFields($condition_string, $fields);
 614
 615                 if ($usermode) {
 616                         $condition_string = $condition_string . ' AND ' . self::condition(true);
 617                 }
 618
 619                 $param_string = DBA::buildParameter($params);
 620                 $param_string = self::addTablesToFields($param_string, $threadfields);
 621                 $param_string = self::addTablesToFields($param_string, $fields);
 622
 623                 $table = "`thread` " . self::constructJoins($uid, $select_fields . $condition_string . $param_string, true, $usermode);
 624
 625                 $sql = "SELECT " . $select_fields . " FROM " . $table . $condition_string . $param_string;
 626
 627                 return DBA::p($sql, $condition);
 628         }
 629
 630         /**
 631          * Returns a list of fields that are associated with the item table
 632          *
 633          * @param $usermode
 634          * @return array field list
 635          */
 636         private static function fieldlist($usermode)
 637         {
 638                 $fields = [];
 639
 640                 $fields['item'] = ['id', 'uid', 'parent', 'uri', 'parent-uri', 'thr-parent', 'guid',
 641                         'contact-id', 'owner-id', 'author-id', 'type', 'wall', 'gravity', 'extid',
 642                         'created', 'edited', 'commented', 'received', 'changed', 'psid',
 643                         'resource-id', 'event-id', 'tag', 'attach', 'post-type', 'file',
 644                         'private', 'pubmail', 'moderated', 'visible', 'starred', 'bookmark',
 645                         'unseen', 'deleted', 'origin', 'forum_mode', 'mention', 'global',
 646                         'id' => 'item_id', 'network', 'icid', 'iaid', 'id' => 'internal-iid',
 647                         'network' => 'internal-network', 'icid' => 'internal-icid',
 648                         'iaid' => 'internal-iaid'];
 649
 650                 if ($usermode) {
 651                         $fields['user-item'] = ['pinned', 'notification-type', 'ignored' => 'internal-user-ignored'];
 652                 }
 653
 654                 $fields['item-activity'] = ['activity', 'activity' => 'internal-activity'];
 655
 656                 $fields['item-content'] = array_merge(self::CONTENT_FIELDLIST, self::MIXED_CONTENT_FIELDLIST);
 657
 658                 $fields['item-delivery-data'] = array_merge(ItemDeliveryData::LEGACY_FIELD_LIST, ItemDeliveryData::FIELD_LIST);
 659
 660                 $fields['permissionset'] = ['allow_cid', 'allow_gid', 'deny_cid', 'deny_gid'];
 661
 662                 $fields['author'] = ['url' => 'author-link', 'name' => 'author-name', 'addr' => 'author-addr',
 663                         'thumb' => 'author-avatar', 'nick' => 'author-nick', 'network' => 'author-network'];
 664
 665                 $fields['owner'] = ['url' => 'owner-link', 'name' => 'owner-name', 'addr' => 'owner-addr',
 666                         'thumb' => 'owner-avatar', 'nick' => 'owner-nick', 'network' => 'owner-network'];
 667
 668                 $fields['contact'] = ['url' => 'contact-link', 'name' => 'contact-name', 'thumb' => 'contact-avatar',
 669                         'writable', 'self', 'id' => 'cid', 'alias', 'uid' => 'contact-uid',
 670                         'photo', 'name-date', 'uri-date', 'avatar-date', 'thumb', 'dfrn-id'];
 671
 672                 $fields['parent-item'] = ['guid' => 'parent-guid', 'network' => 'parent-network'];
 673
 674                 $fields['parent-item-author'] = ['url' => 'parent-author-link', 'name' => 'parent-author-name'];
 675
 676                 $fields['event'] = ['created' => 'event-created', 'edited' => 'event-edited',
 677                         'start' => 'event-start','finish' => 'event-finish',
 678                         'summary' => 'event-summary','desc' => 'event-desc',
 679                         'location' => 'event-location', 'type' => 'event-type',
 680                         'nofinish' => 'event-nofinish','adjust' => 'event-adjust',
 681                         'ignore' => 'event-ignore', 'id' => 'event-id'];
 682
 683                 $fields['sign'] = ['signed_text', 'signature', 'signer'];
 684
 685                 $fields['diaspora-interaction'] = ['interaction'];
 686
 687                 return $fields;
 688         }
 689
 690         /**
 691          * Returns SQL condition for the "select" functions
 692          *
 693          * @param boolean $thread_mode Called for the items (false) or for the threads (true)
 694          *
 695          * @return string SQL condition
 696          */
 697         private static function condition($thread_mode)
 698         {
 699                 if ($thread_mode) {
 700                         $master_table = "`thread`";
 701                 } else {
 702                         $master_table = "`item`";
 703                 }
 704                 return sprintf("$master_table.`visible` AND NOT $master_table.`deleted` AND NOT $master_table.`moderated`
 705                         AND (`user-item`.`hidden` IS NULL OR NOT `user-item`.`hidden`)
 706                         AND (`user-author`.`blocked` IS NULL OR NOT `user-author`.`blocked`)
 707                         AND (`user-author`.`ignored` IS NULL OR NOT `user-author`.`ignored` OR `item`.`gravity` != %d)
 708                         AND (`user-owner`.`blocked` IS NULL OR NOT `user-owner`.`blocked`)
 709                         AND (`user-owner`.`ignored` IS NULL OR NOT `user-owner`.`ignored` OR `item`.`gravity` != %d) ",
 710                         GRAVITY_PARENT, GRAVITY_PARENT);
 711         }
 712
 713         /**
 714          * Returns all needed "JOIN" commands for the "select" functions
 715          *
 716          * @param integer $uid          User ID
 717          * @param string  $sql_commands The parts of the built SQL commands in the "select" functions
 718          * @param boolean $thread_mode  Called for the items (false) or for the threads (true)
 719          *
 720          * @param         $user_mode
 721          * @return string The SQL joins for the "select" functions
 722          */
 723         private static function constructJoins($uid, $sql_commands, $thread_mode, $user_mode)
 724         {
 725                 if ($thread_mode) {
 726                         $master_table = "`thread`";
 727                         $master_table_key = "`thread`.`iid`";
 728                         $joins = "STRAIGHT_JOIN `item` ON `item`.`id` = `thread`.`iid` ";
 729                 } else {
 730                         $master_table = "`item`";
 731                         $master_table_key = "`item`.`id`";
 732                         $joins = '';
 733                 }
 734
 735                 if ($user_mode) {
 736                         $joins .= sprintf("STRAIGHT_JOIN `contact` ON `contact`.`id` = $master_table.`contact-id`
 737                                 AND NOT `contact`.`blocked`
 738                                 AND ((NOT `contact`.`readonly` AND NOT `contact`.`pending` AND (`contact`.`rel` IN (%s, %s)))
 739                                 OR `contact`.`self` OR `item`.`gravity` != %d OR `contact`.`uid` = 0)
 740                                 STRAIGHT_JOIN `contact` AS `author` ON `author`.`id` = $master_table.`author-id` AND NOT `author`.`blocked`
 741                                 STRAIGHT_JOIN `contact` AS `owner` ON `owner`.`id` = $master_table.`owner-id` AND NOT `owner`.`blocked`
 742                                 LEFT JOIN `user-item` ON `user-item`.`iid` = $master_table_key AND `user-item`.`uid` = %d
 743                                 LEFT JOIN `user-contact` AS `user-author` ON `user-author`.`cid` = $master_table.`author-id` AND `user-author`.`uid` = %d
 744                                 LEFT JOIN `user-contact` AS `user-owner` ON `user-owner`.`cid` = $master_table.`owner-id` AND `user-owner`.`uid` = %d",
 745                                 Contact::SHARING, Contact::FRIEND, GRAVITY_PARENT, intval($uid), intval($uid), intval($uid));
 746                 } else {
 747                         if (strpos($sql_commands, "`contact`.") !== false) {
 748                                 $joins .= "LEFT JOIN `contact` ON `contact`.`id` = $master_table.`contact-id`";
 749                         }
 750                         if (strpos($sql_commands, "`author`.") !== false) {
 751                                 $joins .= " LEFT JOIN `contact` AS `author` ON `author`.`id` = $master_table.`author-id`";
 752                         }
 753                         if (strpos($sql_commands, "`owner`.") !== false) {
 754                                 $joins .= " LEFT JOIN `contact` AS `owner` ON `owner`.`id` = $master_table.`owner-id`";
 755                         }
 756                 }
 757
 758                 if (strpos($sql_commands, "`group_member`.") !== false) {
 759                         $joins .= " STRAIGHT_JOIN `group_member` ON `group_member`.`contact-id` = $master_table.`contact-id`";
 760                 }
 761
 762                 if (strpos($sql_commands, "`user`.") !== false) {
 763                         $joins .= " STRAIGHT_JOIN `user` ON `user`.`uid` = $master_table.`uid`";
 764                 }
 765
 766                 if (strpos($sql_commands, "`event`.") !== false) {
 767                         $joins .= " LEFT JOIN `event` ON `event-id` = `event`.`id`";
 768                 }
 769
 770                 if (strpos($sql_commands, "`sign`.") !== false) {
 771                         $joins .= " LEFT JOIN `sign` ON `sign`.`iid` = `item`.`id`";
 772                 }
 773
 774                 if (strpos($sql_commands, "`diaspora-interaction`.") !== false) {
 775                         $joins .= " LEFT JOIN `diaspora-interaction` ON `diaspora-interaction`.`uri-id` = `item`.`uri-id`";
 776                 }
 777
 778                 if (strpos($sql_commands, "`item-activity`.") !== false) {
 779                         $joins .= " LEFT JOIN `item-activity` ON `item-activity`.`uri-id` = `item`.`uri-id`";
 780                 }
 781
 782                 if (strpos($sql_commands, "`item-content`.") !== false) {
 783                         $joins .= " LEFT JOIN `item-content` ON `item-content`.`uri-id` = `item`.`uri-id`";
 784                 }
 785
 786                 if (strpos($sql_commands, "`item-delivery-data`.") !== false) {
 787                         $joins .= " LEFT JOIN `item-delivery-data` ON `item-delivery-data`.`iid` = `item`.`id`";
 788                 }
 789
 790                 if (strpos($sql_commands, "`permissionset`.") !== false) {
 791                         $joins .= " LEFT JOIN `permissionset` ON `permissionset`.`id` = `item`.`psid`";
 792                 }
 793
 794                 if ((strpos($sql_commands, "`parent-item`.") !== false) || (strpos($sql_commands, "`parent-author`.") !== false)) {
 795                         $joins .= " STRAIGHT_JOIN `item` AS `parent-item` ON `parent-item`.`id` = `item`.`parent`";
 796                 }
 797
 798                 if (strpos($sql_commands, "`parent-item-author`.") !== false) {
 799                         $joins .= " STRAIGHT_JOIN `contact` AS `parent-item-author` ON `parent-item-author`.`id` = `parent-item`.`author-id`";
 800                 }
 801
 802                 return $joins;
 803         }
 804
 805         /**
 806          * Add the field list for the "select" functions
 807          *
 808          * @param array $fields The field definition array
 809          * @param array $selected The array with the selected fields from the "select" functions
 810          *
 811          * @return string The field list
 812          */
 813         private static function constructSelectFields($fields, $selected)
 814         {
 815                 if (!empty($selected)) {
 816                         $selected[] = 'internal-iid';
 817                         $selected[] = 'internal-iaid';
 818                         $selected[] = 'internal-icid';
 819                         $selected[] = 'internal-network';
 820                 }
 821
 822                 if (in_array('verb', $selected)) {
 823                         $selected[] = 'internal-activity';
 824                 }
 825
 826                 if (in_array('ignored', $selected)) {
 827                         $selected[] = 'internal-user-ignored';
 828                 }
 829
 830                 if (in_array('signed_text', $selected)) {
 831                         $selected[] = 'interaction';
 832                 }
 833
 834                 $legacy_fields = array_merge(ItemDeliveryData::LEGACY_FIELD_LIST, self::MIXED_CONTENT_FIELDLIST);
 835
 836                 $selection = [];
 837                 foreach ($fields as $table => $table_fields) {
 838                         foreach ($table_fields as $field => $select) {
 839                                 if (empty($selected) || in_array($select, $selected)) {
 840                                         if (self::isLegacyMode() && in_array($select, $legacy_fields)) {
 841                                                 $selection[] = "`item`.`".$select."` AS `internal-item-" . $select . "`";
 842                                         }
 843                                         if (is_int($field)) {
 844                                                 $selection[] = "`" . $table . "`.`" . $select . "`";
 845                                         } else {
 846                                                 $selection[] = "`" . $table . "`.`" . $field . "` AS `" . $select . "`";
 847                                         }
 848                                 }
 849                         }
 850                 }
 851                 return implode(", ", $selection);
 852         }
 853
 854         /**
 855          * add table definition to fields in an SQL query
 856          *
 857          * @param string $query SQL query
 858          * @param array $fields The field definition array
 859          *
 860          * @return string the changed SQL query
 861          */
 862         private static function addTablesToFields($query, $fields)
 863         {
 864                 foreach ($fields as $table => $table_fields) {
 865                         foreach ($table_fields as $alias => $field) {
 866                                 if (is_int($alias)) {
 867                                         $replace_field = $field;
 868                                 } else {
 869                                         $replace_field = $alias;
 870                                 }
 871
 872                                 $search = "/([^\.])`" . $field . "`/i";
 873                                 $replace = "$1`" . $table . "`.`" . $replace_field . "`";
 874                                 $query = preg_replace($search, $replace, $query);
 875                         }
 876                 }
 877                 return $query;
 878         }
 879
 880         /**
 881          * Update existing item entries
 882          *
 883          * @param array $fields    The fields that are to be changed
 884          * @param array $condition The condition for finding the item entries
 885          *
 886          * In the future we may have to change permissions as well.
 887          * Then we had to add the user id as third parameter.
 888          *
 889          * A return value of "0" doesn't mean an error - but that 0 rows had been changed.
 890          *
 891          * @return integer|boolean number of affected rows - or "false" if there was an error
 892          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 893          */
 894         public static function update(array $fields, array $condition)
 895         {
 896                 if (empty($condition) || empty($fields)) {
 897                         return false;
 898                 }
 899
 900                 // To ensure the data integrity we do it in an transaction
 901                 DBA::transaction();
 902
 903                 // We cannot simply expand the condition to check for origin entries
 904                 // The condition needn't to be a simple array but could be a complex condition.
 905                 // And we have to execute this query before the update to ensure to fetch the same data.
 906                 $items = DBA::select('item', ['id', 'origin', 'uri', 'uri-id', 'iaid', 'icid', 'tag', 'file'], $condition);
 907
 908                 $content_fields = [];
 909                 foreach (array_merge(self::CONTENT_FIELDLIST, self::MIXED_CONTENT_FIELDLIST) as $field) {
 910                         if (isset($fields[$field])) {
 911                                 $content_fields[$field] = $fields[$field];
 912                                 if (in_array($field, self::CONTENT_FIELDLIST) || !self::isLegacyMode()) {
 913                                         unset($fields[$field]);
 914                                 } else {
 915                                         $fields[$field] = null;
 916                                 }
 917                         }
 918                 }
 919
 920                 $delivery_data = ItemDeliveryData::extractFields($fields);
 921
 922                 $clear_fields = ['bookmark', 'type', 'author-name', 'author-avatar', 'author-link', 'owner-name', 'owner-avatar', 'owner-link', 'postopts', 'inform'];
 923                 foreach ($clear_fields as $field) {
 924                         if (array_key_exists($field, $fields)) {
 925                                 $fields[$field] = null;
 926                         }
 927                 }
 928
 929                 if (array_key_exists('tag', $fields)) {
 930                         $tags = $fields['tag'];
 931                         $fields['tag'] = null;
 932                 } else {
 933                         $tags = null;
 934                 }
 935
 936                 if (array_key_exists('file', $fields)) {
 937                         $files = $fields['file'];
 938                         $fields['file'] = null;
 939                 } else {
 940                         $files = null;
 941                 }
 942
 943                 if (!empty($fields)) {
 944                         $success = DBA::update('item', $fields, $condition);
 945
 946                         if (!$success) {
 947                                 DBA::close($items);
 948                                 DBA::rollback();
 949                                 return false;
 950                         }
 951                 }
 952
 953                 // When there is no content for the "old" item table, this will count the fetched items
 954                 $rows = DBA::affectedRows();
 955
 956                 $notify_items = [];
 957
 958                 while ($item = DBA::fetch($items)) {
 959                         if (!empty($item['iaid']) || (!empty($content_fields['verb']) && (self::activityToIndex($content_fields['verb']) >= 0))) {
 960                                 self::updateActivity($content_fields, ['uri-id' => $item['uri-id']]);
 961
 962                                 if (empty($item['iaid'])) {
 963                                         $item_activity = DBA::selectFirst('item-activity', ['id'], ['uri-id' => $item['uri-id']]);
 964                                         if (DBA::isResult($item_activity)) {
 965                                                 $item_fields = ['iaid' => $item_activity['id'], 'icid' => null];
 966                                                 foreach (self::MIXED_CONTENT_FIELDLIST as $field) {
 967                                                         if (self::isLegacyMode()) {
 968                                                                 $item_fields[$field] = null;
 969                                                         } else {
 970                                                                 unset($item_fields[$field]);
 971                                                         }
 972                                                 }
 973                                                 DBA::update('item', $item_fields, ['id' => $item['id']]);
 974
 975                                                 if (!empty($item['icid']) && !DBA::exists('item', ['icid' => $item['icid']])) {
 976                                                         DBA::delete('item-content', ['id' => $item['icid']]);
 977                                                 }
 978                                         }
 979                                 } elseif (!empty($item['icid'])) {
 980                                         DBA::update('item', ['icid' => null], ['id' => $item['id']]);
 981
 982                                         if (!DBA::exists('item', ['icid' => $item['icid']])) {
 983                                                 DBA::delete('item-content', ['id' => $item['icid']]);
 984                                         }
 985                                 }
 986                         } else {
 987                                 self::updateContent($content_fields, ['uri-id' => $item['uri-id']]);
 988
 989                                 if (empty($item['icid'])) {
 990                                         $item_content = DBA::selectFirst('item-content', [], ['uri-id' => $item['uri-id']]);
 991                                         if (DBA::isResult($item_content)) {
 992                                                 $item_fields = ['icid' => $item_content['id']];
 993                                                 // Clear all fields in the item table that have a content in the item-content table
 994                                                 foreach ($item_content as $field => $content) {
 995                                                         if (in_array($field, self::MIXED_CONTENT_FIELDLIST) && !empty($item_content[$field])) {
 996                                                                 if (self::isLegacyMode()) {
 997                                                                         $item_fields[$field] = null;
 998                                                                 } else {
 999                                                                         unset($item_fields[$field]);
1000                                                                 }
1001                                                         }
1002                                                 }
1003                                                 DBA::update('item', $item_fields, ['id' => $item['id']]);
1004                                         }
1005                                 }
1006                         }
1007
1008                         if (!is_null($tags)) {
1009                                 Term::insertFromTagFieldByItemId($item['id'], $tags);
1010                                 if (!empty($item['tag'])) {
1011                                         DBA::update('item', ['tag' => ''], ['id' => $item['id']]);
1012                                 }
1013                         }
1014
1015                         if (!is_null($files)) {
1016                                 Term::insertFromFileFieldByItemId($item['id'], $files);
1017                                 if (!empty($item['file'])) {
1018                                         DBA::update('item', ['file' => ''], ['id' => $item['id']]);
1019                                 }
1020                         }
1021
1022                         ItemDeliveryData::update($item['id'], $delivery_data);
1023
1024                         self::updateThread($item['id']);
1025
1026                         // We only need to notfiy others when it is an original entry from us.
1027                         // Only call the notifier when the item has some content relevant change.
1028                         if ($item['origin'] && in_array('edited', array_keys($fields))) {
1029                                 $notify_items[] = $item['id'];
1030                         }
1031                 }
1032
1033                 DBA::close($items);
1034                 DBA::commit();
1035
1036                 foreach ($notify_items as $notify_item) {
1037                         Worker::add(PRIORITY_HIGH, "Notifier", Delivery::POST, $notify_item);
1038                 }
1039
1040                 return $rows;
1041         }
1042
1043         /**
1044          * Delete an item and notify others about it - if it was ours
1045          *
1046          * @param array   $condition The condition for finding the item entries
1047          * @param integer $priority  Priority for the notification
1048          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1049          */
1050         public static function delete($condition, $priority = PRIORITY_HIGH)
1051         {
1052                 $items = self::select(['id'], $condition);
1053                 while ($item = self::fetch($items)) {
1054                         self::deleteById($item['id'], $priority);
1055                 }
1056                 DBA::close($items);
1057         }
1058
1059         /**
1060          * Delete an item for an user and notify others about it - if it was ours
1061          *
1062          * @param array   $condition The condition for finding the item entries
1063          * @param integer $uid       User who wants to delete this item
1064          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1065          */
1066         public static function deleteForUser($condition, $uid)
1067         {
1068                 if ($uid == 0) {
1069                         return;
1070                 }
1071
1072                 $items = self::select(['id', 'uid'], $condition);
1073                 while ($item = self::fetch($items)) {
1074                         // "Deleting" global items just means hiding them
1075                         if ($item['uid'] == 0) {
1076                                 DBA::update('user-item', ['hidden' => true], ['iid' => $item['id'], 'uid' => $uid], true);
1077
1078                                 // Delete notifications
1079                                 DBA::delete('notify', ['iid' => $item['id'], 'uid' => $uid]);
1080                         } elseif ($item['uid'] == $uid) {
1081                                 self::deleteById($item['id'], PRIORITY_HIGH);
1082                         } else {
1083                                 Logger::log('Wrong ownership. Not deleting item ' . $item['id']);
1084                         }
1085                 }
1086                 DBA::close($items);
1087         }
1088
1089         /**
1090          * Delete an item and notify others about it - if it was ours
1091          *
1092          * @param integer $item_id  Item ID that should be delete
1093          * @param integer $priority Priority for the notification
1094          *
1095          * @return boolean success
1096          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1097          */
1098         public static function deleteById($item_id, $priority = PRIORITY_HIGH)
1099         {
1100                 // locate item to be deleted
1101                 $fields = ['id', 'uri', 'uid', 'parent', 'parent-uri', 'origin',
1102                         'deleted', 'file', 'resource-id', 'event-id', 'attach',
1103                         'verb', 'object-type', 'object', 'target', 'contact-id',
1104                         'icid', 'iaid', 'psid'];
1105                 $item = self::selectFirst($fields, ['id' => $item_id]);
1106                 if (!DBA::isResult($item)) {
1107                         Logger::log('Item with ID ' . $item_id . " hasn't been found.", Logger::DEBUG);
1108                         return false;
1109                 }
1110
1111                 if ($item['deleted']) {
1112                         Logger::log('Item with ID ' . $item_id . ' has already been deleted.', Logger::DEBUG);
1113                         return false;
1114                 }
1115
1116                 $parent = self::selectFirst(['origin'], ['id' => $item['parent']]);
1117                 if (!DBA::isResult($parent)) {
1118                         $parent = ['origin' => false];
1119                 }
1120
1121                 // clean up categories and tags so they don't end up as orphans
1122
1123                 $matches = false;
1124                 $cnt = preg_match_all('/<(.*?)>/', $item['file'], $matches, PREG_SET_ORDER);
1125
1126                 if ($cnt) {
1127                         foreach ($matches as $mtch) {
1128                                 FileTag::unsaveFile($item['uid'], $item['id'], $mtch[1],true);
1129                         }
1130                 }
1131
1132                 $matches = false;
1133
1134                 $cnt = preg_match_all('/\[(.*?)\]/', $item['file'], $matches, PREG_SET_ORDER);
1135
1136                 if ($cnt) {
1137                         foreach ($matches as $mtch) {
1138                                 FileTag::unsaveFile($item['uid'], $item['id'], $mtch[1],false);
1139                         }
1140                 }
1141
1142                 /*
1143                  * If item is a link to a photo resource, nuke all the associated photos
1144                  * (visitors will not have photo resources)
1145                  * This only applies to photos uploaded from the photos page. Photos inserted into a post do not
1146                  * generate a resource-id and therefore aren't intimately linked to the item.
1147                  */
1148                 /// @TODO: this should first check if photo is used elsewhere
1149                 if (strlen($item['resource-id'])) {
1150                         Photo::delete(['resource-id' => $item['resource-id'], 'uid' => $item['uid']]);
1151                 }
1152
1153                 // If item is a link to an event, delete the event.
1154                 if (intval($item['event-id'])) {
1155                         Event::delete($item['event-id']);
1156                 }
1157
1158                 // If item has attachments, drop them
1159                 /// @TODO: this should first check if attachment is used elsewhere
1160                 foreach (explode(",", $item['attach']) as $attach) {
1161                         preg_match("|attach/(\d+)|", $attach, $matches);
1162                         if (is_array($matches) && count($matches) > 1) {
1163                                 Attach::delete(['id' => $matches[1], 'uid' => $item['uid']]);
1164                         }
1165                 }
1166
1167                 // Delete tags that had been attached to other items
1168                 self::deleteTagsFromItem($item);
1169
1170                 // Delete notifications
1171                 DBA::delete('notify', ['iid' => $item['id'], 'uid' => $item['uid']]);
1172
1173                 // Set the item to "deleted"
1174                 $item_fields = ['deleted' => true, 'edited' => DateTimeFormat::utcNow(), 'changed' => DateTimeFormat::utcNow()];
1175                 DBA::update('item', $item_fields, ['id' => $item['id']]);
1176
1177                 Term::insertFromTagFieldByItemId($item['id'], '');
1178                 Term::insertFromFileFieldByItemId($item['id'], '');
1179                 self::deleteThread($item['id'], $item['parent-uri']);
1180
1181                 if (!self::exists(["`uri` = ? AND `uid` != 0 AND NOT `deleted`", $item['uri']])) {
1182                         self::delete(['uri' => $item['uri'], 'uid' => 0, 'deleted' => false], $priority);
1183                 }
1184
1185                 ItemDeliveryData::delete($item['id']);
1186
1187                 // We don't delete the item-activity here, since we need some of the data for ActivityPub
1188
1189                 if (!empty($item['icid']) && !self::exists(['icid' => $item['icid'], 'deleted' => false])) {
1190                         DBA::delete('item-content', ['id' => $item['icid']], ['cascade' => false]);
1191                 }
1192                 // When the permission set will be used in photo and events as well,
1193                 // this query here needs to be extended.
1194                 // @todo Currently deactivated. We need the permission set in the deletion process.
1195                 // This is a reminder to add the removal somewhere else.
1196                 //if (!empty($item['psid']) && !self::exists(['psid' => $item['psid'], 'deleted' => false])) {
1197                 //      DBA::delete('permissionset', ['id' => $item['psid']], ['cascade' => false]);
1198                 //}
1199
1200                 // If it's the parent of a comment thread, kill all the kids
1201                 if ($item['id'] == $item['parent']) {
1202                         self::delete(['parent' => $item['parent'], 'deleted' => false], $priority);
1203                 }
1204
1205                 // Is it our comment and/or our thread?
1206                 if ($item['origin'] || $parent['origin']) {
1207
1208                         // When we delete the original post we will delete all existing copies on the server as well
1209                         self::delete(['uri' => $item['uri'], 'deleted' => false], $priority);
1210
1211                         // send the notification upstream/downstream
1212                         Worker::add(['priority' => $priority, 'dont_fork' => true], "Notifier", Delivery::DELETION, intval($item['id']));
1213                 } elseif ($item['uid'] != 0) {
1214
1215                         // When we delete just our local user copy of an item, we have to set a marker to hide it
1216                         $global_item = self::selectFirst(['id'], ['uri' => $item['uri'], 'uid' => 0, 'deleted' => false]);
1217                         if (DBA::isResult($global_item)) {
1218                                 DBA::update('user-item', ['hidden' => true], ['iid' => $global_item['id'], 'uid' => $item['uid']], true);
1219                         }
1220                 }
1221
1222                 Logger::log('Item with ID ' . $item_id . " has been deleted.", Logger::DEBUG);
1223
1224                 return true;
1225         }
1226
1227         private static function deleteTagsFromItem($item)
1228         {
1229                 if (($item["verb"] != Activity::TAG) || ($item["object-type"] != Activity\ObjectType::TAGTERM)) {
1230                         return;
1231                 }
1232
1233                 $xo = XML::parseString($item["object"], false);
1234                 $xt = XML::parseString($item["target"], false);
1235
1236                 if ($xt->type != Activity\ObjectType::NOTE) {
1237                         return;
1238                 }
1239
1240                 $i = self::selectFirst(['id', 'contact-id', 'tag'], ['uri' => $xt->id, 'uid' => $item['uid']]);
1241                 if (!DBA::isResult($i)) {
1242                         return;
1243                 }
1244
1245                 // For tags, the owner cannot remove the tag on the author's copy of the post.
1246                 $owner_remove = ($item["contact-id"] == $i["contact-id"]);
1247                 $author_copy = $item["origin"];
1248
1249                 if (($owner_remove && $author_copy) || !$owner_remove) {
1250                         return;
1251                 }
1252
1253                 $tags = explode(',', $i["tag"]);
1254                 $newtags = [];
1255                 if (count($tags)) {
1256                         foreach ($tags as $tag) {
1257                                 if (trim($tag) !== trim($xo->body)) {
1258                                        $newtags[] = trim($tag);
1259                                 }
1260                         }
1261                 }
1262                 self::update(['tag' => implode(',', $newtags)], ['id' => $i["id"]]);
1263         }
1264
1265         private static function guid($item, $notify)
1266         {
1267                 if (!empty($item['guid'])) {
1268                         return Strings::escapeTags(trim($item['guid']));
1269                 }
1270
1271                 if ($notify) {
1272                         // We have to avoid duplicates. So we create the GUID in form of a hash of the plink or uri.
1273                         // We add the hash of our own host because our host is the original creator of the post.
1274                         $prefix_host = DI::baseUrl()->getHostname();
1275                 } else {
1276                         $prefix_host = '';
1277
1278                         // We are only storing the post so we create a GUID from the original hostname.
1279                         if (!empty($item['author-link'])) {
1280                                 $parsed = parse_url($item['author-link']);
1281                                 if (!empty($parsed['host'])) {
1282                                         $prefix_host = $parsed['host'];
1283                                 }
1284                         }
1285
1286                         if (empty($prefix_host) && !empty($item['plink'])) {
1287                                 $parsed = parse_url($item['plink']);
1288                                 if (!empty($parsed['host'])) {
1289                                         $prefix_host = $parsed['host'];
1290                                 }
1291                         }
1292
1293                         if (empty($prefix_host) && !empty($item['uri'])) {
1294                                 $parsed = parse_url($item['uri']);
1295                                 if (!empty($parsed['host'])) {
1296                                         $prefix_host = $parsed['host'];
1297                                 }
1298                         }
1299
1300                         // Is it in the format data@host.tld? - Used for mail contacts
1301                         if (empty($prefix_host) && !empty($item['author-link']) && strstr($item['author-link'], '@')) {
1302                                 $mailparts = explode('@', $item['author-link']);
1303                                 $prefix_host = array_pop($mailparts);
1304                         }
1305                 }
1306
1307                 if (!empty($item['plink'])) {
1308                         $guid = self::guidFromUri($item['plink'], $prefix_host);
1309                 } elseif (!empty($item['uri'])) {
1310                         $guid = self::guidFromUri($item['uri'], $prefix_host);
1311                 } else {
1312                         $guid = System::createUUID(hash('crc32', $prefix_host));
1313                 }
1314
1315                 return $guid;
1316         }
1317
1318         private static function contactId($item)
1319         {
1320                 if (!empty($item['contact-id']) && DBA::exists('contact', ['self' => true, 'id' => $item['contact-id']])) {
1321                         return $item['contact-id'];
1322                 } elseif (($item['gravity'] == GRAVITY_PARENT) && !empty($item['uid']) && !empty($item['contact-id']) && Contact::isSharing($item['contact-id'], $item['uid'])) {
1323                         return $item['contact-id'];
1324                 } elseif (!empty($item['uid']) && !Contact::isSharing($item['author-id'], $item['uid'])) {
1325                         return $item['author-id'];
1326                 } elseif (!empty($item['contact-id'])) {
1327                         return $item['contact-id'];
1328                 } else {
1329                         $contact_id = Contact::getIdForURL($item['author-link'], $item['uid']);
1330                         if (!empty($contact_id)) {
1331                                 return $contact_id;
1332                         }
1333                 }
1334                 return $item['author-id'];
1335         }
1336
1337         // This function will finally cover most of the preparation functionality in mod/item.php
1338         public static function prepare(&$item)
1339         {
1340                 /*
1341                  * @TODO: Unused code triggering inspection errors
1342                  *
1343                 $data = BBCode::getAttachmentData($item['body']);
1344                 if ((preg_match_all("/\[bookmark\=([^\]]*)\](.*?)\[\/bookmark\]/ism", $item['body'], $match, PREG_SET_ORDER) || isset($data["type"]))
1345                         && ($posttype != Item::PT_PERSONAL_NOTE)) {
1346                         $posttype = Item::PT_PAGE;
1347                         $objecttype = ACTIVITY_OBJ_BOOKMARK;
1348                 }
1349                  */
1350         }
1351
1352         /**
1353          * Write an item array into a spool file to be inserted later.
1354          * This command is called whenever there are issues storing an item.
1355          *
1356          * @param array $item The item fields that are to be inserted
1357          * @throws \Exception
1358          */
1359         private static function spool($orig_item)
1360         {
1361                 // Now we store the data in the spool directory
1362                 // We use "microtime" to keep the arrival order and "mt_rand" to avoid duplicates
1363                 $file = 'item-' . round(microtime(true) * 10000) . '-' . mt_rand() . '.msg';
1364
1365                 $spoolpath = get_spoolpath();
1366                 if ($spoolpath != "") {
1367                         $spool = $spoolpath . '/' . $file;
1368
1369                         file_put_contents($spool, json_encode($orig_item));
1370                         Logger::warning("Item wasn't stored - Item was spooled into file", ['file' => $file]);
1371                 }
1372         }
1373
1374         public static function insert($item, $force_parent = false, $notify = false, $dontcache = false)
1375         {
1376                 $orig_item = $item;
1377
1378                 $priority = PRIORITY_HIGH;
1379
1380                 // If it is a posting where users should get notifications, then define it as wall posting
1381                 if ($notify) {
1382                         $item['wall'] = 1;
1383                         $item['origin'] = 1;
1384                         $item['network'] = Protocol::DFRN;
1385                         $item['protocol'] = Conversation::PARCEL_DFRN;
1386
1387                         if (is_int($notify)) {
1388                                 $priority = $notify;
1389                         }
1390                 } else {
1391                         $item['network'] = trim(($item['network'] ?? '') ?: Protocol::PHANTOM);
1392                 }
1393
1394                 $item['guid'] = self::guid($item, $notify);
1395                 $item['uri'] = Strings::escapeTags(trim(($item['uri'] ?? '') ?: self::newURI($item['uid'], $item['guid'])));
1396
1397                 // Store URI data
1398                 $item['uri-id'] = ItemURI::insert(['uri' => $item['uri'], 'guid' => $item['guid']]);
1399
1400                 // Store conversation data
1401                 $item = Conversation::insert($item);
1402
1403                 /*
1404                  * If a Diaspora signature structure was passed in, pull it out of the
1405                  * item array and set it aside for later storage.
1406                  */
1407
1408                 $dsprsig = null;
1409                 if (isset($item['dsprsig'])) {
1410                         $encoded_signature = $item['dsprsig'];
1411                         $dsprsig = json_decode(base64_decode($item['dsprsig']));
1412                         unset($item['dsprsig']);
1413                 }
1414
1415                 $diaspora_signed_text = '';
1416                 if (isset($item['diaspora_signed_text'])) {
1417                         $diaspora_signed_text = $item['diaspora_signed_text'];
1418                         unset($item['diaspora_signed_text']);
1419                 }
1420
1421                 // Converting the plink
1422                 /// @TODO Check if this is really still needed
1423                 if ($item['network'] == Protocol::OSTATUS) {
1424                         if (isset($item['plink'])) {
1425                                 $item['plink'] = OStatus::convertHref($item['plink']);
1426                         } elseif (isset($item['uri'])) {
1427                                 $item['plink'] = OStatus::convertHref($item['uri']);
1428                         }
1429                 }
1430
1431                 if (!empty($item['thr-parent'])) {
1432                         $item['parent-uri'] = $item['thr-parent'];
1433                 }
1434
1435                 $activity = DI::activity();
1436
1437                 if (isset($item['gravity'])) {
1438                         $item['gravity'] = intval($item['gravity']);
1439                 } elseif ($item['parent-uri'] === $item['uri']) {
1440                         $item['gravity'] = GRAVITY_PARENT;
1441                 } elseif ($activity->match($item['verb'], Activity::POST)) {
1442                         $item['gravity'] = GRAVITY_COMMENT;
1443                 } elseif ($activity->match($item['verb'], Activity::FOLLOW)) {
1444                         $item['gravity'] = GRAVITY_ACTIVITY;
1445                 } else {
1446                         $item['gravity'] = GRAVITY_UNKNOWN;   // Should not happen
1447                         Logger::log('Unknown gravity for verb: ' . $item['verb'], Logger::DEBUG);
1448                 }
1449
1450                 $uid = intval($item['uid']);
1451
1452                 // check for create date and expire time
1453                 $expire_interval = DI::config()->get('system', 'dbclean-expire-days', 0);
1454
1455                 $user = DBA::selectFirst('user', ['expire'], ['uid' => $uid]);
1456                 if (DBA::isResult($user) && ($user['expire'] > 0) && (($user['expire'] < $expire_interval) || ($expire_interval == 0))) {
1457                         $expire_interval = $user['expire'];
1458                 }
1459
1460                 if (($expire_interval > 0) && !empty($item['created'])) {
1461                         $expire_date = time() - ($expire_interval * 86400);
1462                         $created_date = strtotime($item['created']);
1463                         if ($created_date < $expire_date) {
1464                                 Logger::notice('Item created before expiration interval.', [
1465                                         'created' => date('c', $created_date),
1466                                         'expired' => date('c', $expire_date),
1467                                         '$item' => $item
1468                                 ]);
1469                                 return 0;
1470                         }
1471                 }
1472
1473                 /*
1474                  * Do we already have this item?
1475                  * We have to check several networks since Friendica posts could be repeated
1476                  * via OStatus (maybe Diasporsa as well)
1477                  */
1478                 if (empty($item['network']) || in_array($item['network'], Protocol::FEDERATED)) {
1479                         $condition = ["`uri` = ? AND `uid` = ? AND `network` IN (?, ?, ?, ?)",
1480                                 trim($item['uri']), $item['uid'],
1481                                 Protocol::ACTIVITYPUB, Protocol::DIASPORA, Protocol::DFRN, Protocol::OSTATUS];
1482                         $existing = self::selectFirst(['id', 'network'], $condition);
1483                         if (DBA::isResult($existing)) {
1484                                 // We only log the entries with a different user id than 0. Otherwise we would have too many false positives
1485                                 if ($uid != 0) {
1486                                         Logger::notice('Item already existed for user', [
1487                                                 'uri' => $item['uri'],
1488                                                 'uid' => $uid,
1489                                                 'network' => $item['network'],
1490                                                 'existing_id' => $existing["id"],
1491                                                 'existing_network' => $existing["network"]
1492                                         ]);
1493                                 }
1494
1495                                 return $existing["id"];
1496                         }
1497                 }
1498
1499                 $item['wall']          = intval($item['wall'] ?? 0);
1500                 $item['extid']         = trim($item['extid'] ?? '');
1501                 $item['author-name']   = trim($item['author-name'] ?? '');
1502                 $item['author-link']   = trim($item['author-link'] ?? '');
1503                 $item['author-avatar'] = trim($item['author-avatar'] ?? '');
1504                 $item['owner-name']    = trim($item['owner-name'] ?? '');
1505                 $item['owner-link']    = trim($item['owner-link'] ?? '');
1506                 $item['owner-avatar']  = trim($item['owner-avatar'] ?? '');
1507                 $item['received']      = (isset($item['received'])  ? DateTimeFormat::utc($item['received'])  : DateTimeFormat::utcNow());
1508                 $item['created']       = (isset($item['created'])   ? DateTimeFormat::utc($item['created'])   : $item['received']);
1509                 $item['edited']        = (isset($item['edited'])    ? DateTimeFormat::utc($item['edited'])    : $item['created']);
1510                 $item['changed']       = (isset($item['changed'])   ? DateTimeFormat::utc($item['changed'])   : $item['created']);
1511                 $item['commented']     = (isset($item['commented']) ? DateTimeFormat::utc($item['commented']) : $item['created']);
1512                 $item['title']         = trim($item['title'] ?? '');
1513                 $item['location']      = trim($item['location'] ?? '');
1514                 $item['coord']         = trim($item['coord'] ?? '');
1515                 $item['visible']       = (isset($item['visible']) ? intval($item['visible']) : 1);
1516                 $item['deleted']       = 0;
1517                 $item['parent-uri']    = trim(($item['parent-uri'] ?? '') ?: $item['uri']);
1518                 $item['post-type']     = ($item['post-type'] ?? '') ?: self::PT_ARTICLE;
1519                 $item['verb']          = trim($item['verb'] ?? '');
1520                 $item['object-type']   = trim($item['object-type'] ?? '');
1521                 $item['object']        = trim($item['object'] ?? '');
1522                 $item['target-type']   = trim($item['target-type'] ?? '');
1523                 $item['target']        = trim($item['target'] ?? '');
1524                 $item['plink']         = trim($item['plink'] ?? '');
1525                 $item['allow_cid']     = trim($item['allow_cid'] ?? '');
1526                 $item['allow_gid']     = trim($item['allow_gid'] ?? '');
1527                 $item['deny_cid']      = trim($item['deny_cid'] ?? '');
1528                 $item['deny_gid']      = trim($item['deny_gid'] ?? '');
1529                 $item['private']       = intval($item['private'] ?? 0);
1530                 $item['body']          = trim($item['body'] ?? '');
1531                 $item['tag']           = trim($item['tag'] ?? '');
1532                 $item['attach']        = trim($item['attach'] ?? '');
1533                 $item['app']           = trim($item['app'] ?? '');
1534                 $item['origin']        = intval($item['origin'] ?? 0);
1535                 $item['postopts']      = trim($item['postopts'] ?? '');
1536                 $item['resource-id']   = trim($item['resource-id'] ?? '');
1537                 $item['event-id']      = intval($item['event-id'] ?? 0);
1538                 $item['inform']        = trim($item['inform'] ?? '');
1539                 $item['file']          = trim($item['file'] ?? '');
1540
1541                 // When there is no content then we don't post it
1542                 if ($item['body'].$item['title'] == '') {
1543                         Logger::notice('No body, no title.');
1544                         return 0;
1545                 }
1546
1547                 self::addLanguageToItemArray($item);
1548
1549                 // Items cannot be stored before they happen ...
1550                 if ($item['created'] > DateTimeFormat::utcNow()) {
1551                         $item['created'] = DateTimeFormat::utcNow();
1552                 }
1553
1554                 // We haven't invented time travel by now.
1555                 if ($item['edited'] > DateTimeFormat::utcNow()) {
1556                         $item['edited'] = DateTimeFormat::utcNow();
1557                 }
1558
1559                 $item['plink'] = ($item['plink'] ?? '') ?: DI::baseUrl() . '/display/' . urlencode($item['guid']);
1560
1561                 $default = ['url' => $item['author-link'], 'name' => $item['author-name'],
1562                         'photo' => $item['author-avatar'], 'network' => $item['network']];
1563
1564                 $item['author-id'] = ($item['author-id'] ?? 0) ?: Contact::getIdForURL($item['author-link'], 0, false, $default);
1565
1566                 if (Contact::isBlocked($item['author-id'])) {
1567                         Logger::notice('Author is blocked node-wide', ['author-link' => $item['author-link'], 'item-uri' => $item['uri']]);
1568                         return 0;
1569                 }
1570
1571                 if (!empty($item['author-link']) && Network::isUrlBlocked($item['author-link'])) {
1572                         Logger::notice('Author server is blocked', ['author-link' => $item['author-link'], 'item-uri' => $item['uri']]);
1573                         return 0;
1574                 }
1575
1576                 if (!empty($uid) && Contact::isBlockedByUser($item['author-id'], $uid)) {
1577                         Logger::notice('Author is blocked by user', ['author-link' => $item['author-link'], 'uid' => $uid, 'item-uri' => $item['uri']]);
1578                         return 0;
1579                 }
1580
1581                 $default = ['url' => $item['owner-link'], 'name' => $item['owner-name'],
1582                         'photo' => $item['owner-avatar'], 'network' => $item['network']];
1583
1584                 $item['owner-id'] = ($item['owner-id'] ?? 0) ?: Contact::getIdForURL($item['owner-link'], 0, false, $default);
1585
1586                 if (Contact::isBlocked($item['owner-id'])) {
1587                         Logger::notice('Owner is blocked node-wide', ['owner-link' => $item['owner-link'], 'item-uri' => $item['uri']]);
1588                         return 0;
1589                 }
1590
1591                 if (!empty($item['owner-link']) && Network::isUrlBlocked($item['owner-link'])) {
1592                         Logger::notice('Owner server is blocked', ['owner-link' => $item['owner-link'], 'item-uri' => $item['uri']]);
1593                         return 0;
1594                 }
1595
1596                 if (!empty($uid) && Contact::isBlockedByUser($item['owner-id'], $uid)) {
1597                         Logger::notice('Owner is blocked by user', ['owner-link' => $item['owner-link'], 'uid' => $uid, 'item-uri' => $item['uri']]);
1598                         return 0;
1599                 }
1600
1601                 // The causer is set during a thread completion, for example because of a reshare. It countains the responsible actor.
1602                 if (!empty($uid) && !empty($item['causer-id']) && Contact::isBlockedByUser($item['causer-id'], $uid)) {
1603                         Logger::notice('Causer is blocked by user', ['causer-link' => $item['causer-link'], 'uid' => $uid, 'item-uri' => $item['uri']]);
1604                         return 0;
1605                 }
1606
1607                 if (!empty($uid) && !empty($item['causer-id']) && ($item['parent-uri'] == $item['uri']) && Contact::isIgnoredByUser($item['causer-id'], $uid)) {
1608                         Logger::notice('Causer is ignored by user', ['causer-link' => $item['causer-link'], 'uid' => $uid, 'item-uri' => $item['uri']]);
1609                         return 0;
1610                 }
1611
1612                 // We don't store the causer, we only have it here for the checks above
1613                 unset($item['causer-id']);
1614                 unset($item['causer-link']);
1615
1616                 // The contact-id should be set before "self::insert" was called - but there seems to be issues sometimes
1617                 $item["contact-id"] = self::contactId($item);
1618
1619                 if ($item['network'] == Protocol::PHANTOM) {
1620                         $item['network'] = Protocol::DFRN;
1621                         Logger::notice('Missing network, setting to {network}.', [
1622                                 'uri' => $item["uri"],
1623                                 'network' => $item['network'],
1624                                 'callstack' => System::callstack()
1625                         ]);
1626                 }
1627
1628                 // Checking if there is already an item with the same guid
1629                 $condition = ['guid' => $item['guid'], 'network' => $item['network'], 'uid' => $item['uid']];
1630                 if (self::exists($condition)) {
1631                         Logger::notice('Found already existing item', [
1632                                 'guid' => $item['guid'],
1633                                 'uid' => $item['uid'],
1634                                 'network' => $item['network']
1635                         ]);
1636                         return 0;
1637                 }
1638
1639                 if ($item['verb'] == Activity::FOLLOW) {
1640                         if (!$item['origin'] && ($item['author-id'] == Contact::getPublicIdByUserId($uid))) {
1641                                 // Our own follow request can be relayed to us. We don't store it to avoid notification chaos.
1642                                 Logger::log("Follow: Don't store not origin follow request from us for " . $item['parent-uri'], Logger::DEBUG);
1643                                 return 0;
1644                         }
1645
1646                         $condition = ['verb' => Activity::FOLLOW, 'uid' => $item['uid'],
1647                                 'parent-uri' => $item['parent-uri'], 'author-id' => $item['author-id']];
1648                         if (self::exists($condition)) {
1649                                 // It happens that we receive multiple follow requests by the same author - we only store one.
1650                                 Logger::log('Follow: Found existing follow request from author ' . $item['author-id'] . ' for ' . $item['parent-uri'], Logger::DEBUG);
1651                                 return 0;
1652                         }
1653                 }
1654
1655                 // Check for hashtags in the body and repair or add hashtag links
1656                 self::setHashtags($item);
1657
1658                 $item['thr-parent'] = $item['parent-uri'];
1659
1660                 $notify_type = Delivery::POST;
1661                 $allow_cid = '';
1662                 $allow_gid = '';
1663                 $deny_cid  = '';
1664                 $deny_gid  = '';
1665
1666                 if ($item['parent-uri'] === $item['uri']) {
1667                         $parent_id = 0;
1668                         $parent_deleted = 0;
1669                         $allow_cid = $item['allow_cid'];
1670                         $allow_gid = $item['allow_gid'];
1671                         $deny_cid  = $item['deny_cid'];
1672                         $deny_gid  = $item['deny_gid'];
1673                 } else {
1674                         // find the parent and snarf the item id and ACLs
1675                         // and anything else we need to inherit
1676
1677                         $fields = ['uri', 'parent-uri', 'id', 'deleted',
1678                                 'allow_cid', 'allow_gid', 'deny_cid', 'deny_gid',
1679                                 'wall', 'private', 'forum_mode', 'origin'];
1680                         $condition = ['uri' => $item['parent-uri'], 'uid' => $item['uid']];
1681                         $params = ['order' => ['id' => false]];
1682                         $parent = self::selectFirst($fields, $condition, $params);
1683
1684                         if (DBA::isResult($parent)) {
1685                                 // is the new message multi-level threaded?
1686                                 // even though we don't support it now, preserve the info
1687                                 // and re-attach to the conversation parent.
1688
1689                                 if ($parent['uri'] != $parent['parent-uri']) {
1690                                         $item['parent-uri'] = $parent['parent-uri'];
1691
1692                                         $condition = ['uri' => $item['parent-uri'],
1693                                                 'parent-uri' => $item['parent-uri'],
1694                                                 'uid' => $item['uid']];
1695                                         $params = ['order' => ['id' => false]];
1696                                         $toplevel_parent = self::selectFirst($fields, $condition, $params);
1697
1698                                         if (DBA::isResult($toplevel_parent)) {
1699                                                 $parent = $toplevel_parent;
1700                                         }
1701                                 }
1702
1703                                 $parent_id      = $parent['id'];
1704                                 $parent_deleted = $parent['deleted'];
1705                                 $allow_cid      = $parent['allow_cid'];
1706                                 $allow_gid      = $parent['allow_gid'];
1707                                 $deny_cid       = $parent['deny_cid'];
1708                                 $deny_gid       = $parent['deny_gid'];
1709                                 $item['wall']   = $parent['wall'];
1710
1711                                 /*
1712                                  * If the parent is private, force privacy for the entire conversation
1713                                  * This differs from the above settings as it subtly allows comments from
1714                                  * email correspondents to be private even if the overall thread is not.
1715                                  */
1716                                 if ($parent['private']) {
1717                                         $item['private'] = $parent['private'];
1718                                 }
1719
1720                                 /*
1721                                  * Edge case. We host a public forum that was originally posted to privately.
1722                                  * The original author commented, but as this is a comment, the permissions
1723                                  * weren't fixed up so it will still show the comment as private unless we fix it here.
1724                                  */
1725                                 if ((intval($parent['forum_mode']) == 1) && $parent['private']) {
1726                                         $item['private'] = 0;
1727                                 }
1728
1729                                 // If its a post that originated here then tag the thread as "mention"
1730                                 if ($item['origin'] && $item['uid']) {
1731                                         DBA::update('thread', ['mention' => true], ['iid' => $parent_id]);
1732                                         Logger::log('tagged thread ' . $parent_id . ' as mention for user ' . $item['uid'], Logger::DEBUG);
1733                                 }
1734                         } else {
1735                                 /*
1736                                  * Allow one to see reply tweets from status.net even when
1737                                  * we don't have or can't see the original post.
1738                                  */
1739                                 if ($force_parent) {
1740                                         Logger::log('$force_parent=true, reply converted to top-level post.');
1741                                         $parent_id = 0;
1742                                         $item['parent-uri'] = $item['uri'];
1743                                         $item['gravity'] = GRAVITY_PARENT;
1744                                 } else {
1745                                         Logger::log('item parent '.$item['parent-uri'].' for '.$item['uid'].' was not found - ignoring item');
1746                                         return 0;
1747                                 }
1748
1749                                 $parent_deleted = 0;
1750                         }
1751                 }
1752
1753                 if (stristr($item['verb'], Activity::POKE)) {
1754                         $notify_type = Delivery::POKE;
1755                 }
1756
1757                 $item['parent-uri-id'] = ItemURI::getIdByURI($item['parent-uri']);
1758                 $item['thr-parent-id'] = ItemURI::getIdByURI($item['thr-parent']);
1759
1760                 $condition = ["`uri` = ? AND `network` IN (?, ?) AND `uid` = ?",
1761                         $item['uri'], $item['network'], Protocol::DFRN, $item['uid']];
1762                 if (self::exists($condition)) {
1763                         Logger::log('duplicated item with the same uri found. '.print_r($item,true));
1764                         return 0;
1765                 }
1766
1767                 // On Friendica and Diaspora the GUID is unique
1768                 if (in_array($item['network'], [Protocol::DFRN, Protocol::DIASPORA])) {
1769                         $condition = ['guid' => $item['guid'], 'uid' => $item['uid']];
1770                         if (self::exists($condition)) {
1771                                 Logger::log('duplicated item with the same guid found. '.print_r($item,true));
1772                                 return 0;
1773                         }
1774                 } elseif ($item['network'] == Protocol::OSTATUS) {
1775                         // Check for an existing post with the same content. There seems to be a problem with OStatus.
1776                         $condition = ["`body` = ? AND `network` = ? AND `created` = ? AND `contact-id` = ? AND `uid` = ?",
1777                                         $item['body'], $item['network'], $item['created'], $item['contact-id'], $item['uid']];
1778                         if (self::exists($condition)) {
1779                                 Logger::log('duplicated item with the same body found. '.print_r($item,true));
1780                                 return 0;
1781                         }
1782                 }
1783
1784                 // Is this item available in the global items (with uid=0)?
1785                 if ($item["uid"] == 0) {
1786                         $item["global"] = true;
1787
1788                         // Set the global flag on all items if this was a global item entry
1789                         DBA::update('item', ['global' => true], ['uri' => $item["uri"]]);
1790                 } else {
1791                         $item["global"] = self::exists(['uid' => 0, 'uri' => $item["uri"]]);
1792                 }
1793
1794                 // ACL settings
1795                 if (strlen($allow_cid) || strlen($allow_gid) || strlen($deny_cid) || strlen($deny_gid)) {
1796                         $private = 1;
1797                 } else {
1798                         $private = $item['private'];
1799                 }
1800
1801                 $item["allow_cid"] = $allow_cid;
1802                 $item["allow_gid"] = $allow_gid;
1803                 $item["deny_cid"] = $deny_cid;
1804                 $item["deny_gid"] = $deny_gid;
1805                 $item["private"] = $private;
1806                 $item["deleted"] = $parent_deleted;
1807
1808                 // Fill the cache field
1809                 self::putInCache($item);
1810
1811                 if ($notify) {
1812                         $item['edit'] = false;
1813                         $item['parent'] = $parent_id;
1814                         Hook::callAll('post_local', $item);
1815                         unset($item['edit']);
1816                         unset($item['parent']);
1817                 } else {
1818                         Hook::callAll('post_remote', $item);
1819                 }
1820
1821                 // This array field is used to trigger some automatic reactions
1822                 // It is mainly used in the "post_local" hook.
1823                 unset($item['api_source']);
1824
1825                 if (!empty($item['cancel'])) {
1826                         Logger::log('post cancelled by addon.');
1827                         return 0;
1828                 }
1829
1830                 /*
1831                  * Check for already added items.
1832                  * There is a timing issue here that sometimes creates double postings.
1833                  * An unique index would help - but the limitations of MySQL (maximum size of index values) prevent this.
1834                  */
1835                 if ($item["uid"] == 0) {
1836                         if (self::exists(['uri' => trim($item['uri']), 'uid' => 0])) {
1837                                 Logger::log('Global item already stored. URI: '.$item['uri'].' on network '.$item['network'], Logger::DEBUG);
1838                                 return 0;
1839                         }
1840                 }
1841
1842                 Logger::log('' . print_r($item,true), Logger::DATA);
1843
1844                 if (array_key_exists('tag', $item)) {
1845                         $tags = $item['tag'];
1846                         unset($item['tag']);
1847                 } else {
1848                         $tags = '';
1849                 }
1850
1851                 if (array_key_exists('file', $item)) {
1852                         $files = $item['file'];
1853                         unset($item['file']);
1854                 } else {
1855                         $files = '';
1856                 }
1857
1858                 // Creates or assigns the permission set
1859                 $item['psid'] = PermissionSet::fetchIDForPost($item);
1860
1861                 // We are doing this outside of the transaction to avoid timing problems
1862                 if (!self::insertActivity($item)) {
1863                         self::insertContent($item);
1864                 }
1865
1866                 $delivery_data = ItemDeliveryData::extractFields($item);
1867
1868                 unset($item['postopts']);
1869                 unset($item['inform']);
1870
1871                 // These fields aren't stored anymore in the item table, they are fetched upon request
1872                 unset($item['author-link']);
1873                 unset($item['author-name']);
1874                 unset($item['author-avatar']);
1875                 unset($item['author-network']);
1876
1877                 unset($item['owner-link']);
1878                 unset($item['owner-name']);
1879                 unset($item['owner-avatar']);
1880
1881                 $like_no_comment = DI::config()->get('system', 'like_no_comment');
1882
1883                 DBA::transaction();
1884                 $ret = DBA::insert('item', $item);
1885
1886                 // When the item was successfully stored we fetch the ID of the item.
1887                 if (DBA::isResult($ret)) {
1888                         $current_post = DBA::lastInsertId();
1889                 } else {
1890                         // This can happen - for example - if there are locking timeouts.
1891                         DBA::rollback();
1892
1893                         // Store the data into a spool file so that we can try again later.
1894                         self::spool($orig_item);
1895                         return 0;
1896                 }
1897
1898                 if ($current_post == 0) {
1899                         // This is one of these error messages that never should occur.
1900                         Logger::log("couldn't find created item - we better quit now.");
1901                         DBA::rollback();
1902                         return 0;
1903                 }
1904
1905                 // How much entries have we created?
1906                 // We wouldn't need this query when we could use an unique index - but MySQL has length problems with them.
1907                 $entries = DBA::count('item', ['uri' => $item['uri'], 'uid' => $item['uid'], 'network' => $item['network']]);
1908
1909                 if ($entries > 1) {
1910                         // There are duplicates. We delete our just created entry.
1911                         Logger::log('Duplicated post occurred. uri = ' . $item['uri'] . ' uid = ' . $item['uid']);
1912
1913                         // Yes, we could do a rollback here - but we are having many users with MyISAM.
1914                         DBA::delete('item', ['id' => $current_post]);
1915                         DBA::commit();
1916                         return 0;
1917                 } elseif ($entries == 0) {
1918                         // This really should never happen since we quit earlier if there were problems.
1919                         Logger::log("Something is terribly wrong. We haven't found our created entry.");
1920                         DBA::rollback();
1921                         return 0;
1922                 }
1923
1924                 Logger::log('created item '.$current_post);
1925
1926                 if (!$parent_id || ($item['parent-uri'] === $item['uri'])) {
1927                         $parent_id = $current_post;
1928                 }
1929
1930                 // Set parent id
1931                 DBA::update('item', ['parent' => $parent_id], ['id' => $current_post]);
1932
1933                 $item['id'] = $current_post;
1934                 $item['parent'] = $parent_id;
1935
1936                 // update the commented timestamp on the parent
1937                 // Only update "commented" if it is really a comment
1938                 if (($item['gravity'] != GRAVITY_ACTIVITY) || !$like_no_comment) {
1939                         DBA::update('item', ['commented' => DateTimeFormat::utcNow(), 'changed' => DateTimeFormat::utcNow()], ['id' => $parent_id]);
1940                 } else {
1941                         DBA::update('item', ['changed' => DateTimeFormat::utcNow()], ['id' => $parent_id]);
1942                 }
1943
1944                 if ($dsprsig) {
1945                         /*
1946                          * Friendica servers lower than 3.4.3-2 had double encoded the signature ...
1947                          * We can check for this condition when we decode and encode the stuff again.
1948                          */
1949                         if (base64_encode(base64_decode(base64_decode($dsprsig->signature))) == base64_decode($dsprsig->signature)) {
1950                                 $dsprsig->signature = base64_decode($dsprsig->signature);
1951                                 Logger::log("Repaired double encoded signature from handle ".$dsprsig->signer, Logger::DEBUG);
1952                         }
1953
1954                         if (!empty($dsprsig->signed_text) && empty($dsprsig->signature) && empty($dsprsig->signer)) {
1955                                 DBA::insert('diaspora-interaction', ['uri-id' => $item['uri-id'], 'interaction' => $dsprsig->signed_text], true);
1956                         } else {
1957                                 // The other fields are used by very old Friendica servers, so we currently store them differently
1958                                 DBA::insert('sign', ['iid' => $current_post, 'signed_text' => $dsprsig->signed_text,
1959                                         'signature' => $dsprsig->signature, 'signer' => $dsprsig->signer]);
1960                         }
1961                 }
1962
1963                 if (!empty($diaspora_signed_text)) {
1964                         DBA::insert('diaspora-interaction', ['uri-id' => $item['uri-id'], 'interaction' => $diaspora_signed_text], true);
1965                 }
1966
1967                 if ($item['parent-uri'] === $item['uri']) {
1968                         self::addThread($current_post);
1969                 } else {
1970                         self::updateThread($parent_id);
1971                 }
1972
1973                 if (!empty($item['origin']) || !empty($item['wall']) || !empty($delivery_data['postopts']) || !empty($delivery_data['inform'])) {
1974                         ItemDeliveryData::insert($current_post, $delivery_data);
1975                 }
1976
1977                 DBA::commit();
1978
1979                 /*
1980                  * Due to deadlock issues with the "term" table we are doing these steps after the commit.
1981                  * This is not perfect - but a workable solution until we found the reason for the problem.
1982                  */
1983                 if (!empty($tags)) {
1984                         Term::insertFromTagFieldByItemId($current_post, $tags);
1985                 }
1986
1987                 if (!empty($files)) {
1988                         Term::insertFromFileFieldByItemId($current_post, $files);
1989                 }
1990
1991                 // In that function we check if this is a forum post. Additionally we delete the item under certain circumstances
1992                 if (self::tagDeliver($item['uid'], $current_post)) {
1993                         // Get the user information for the logging
1994                         $user = User::getById($uid);
1995
1996                         Logger::notice('Item had been deleted', ['id' => $current_post, 'user' => $uid, 'account-type' => $user['account-type']]);
1997                         return 0;
1998                 }
1999
2000                 if (!$dontcache) {
2001                         $posted_item = self::selectFirst(self::ITEM_FIELDLIST, ['id' => $current_post]);
2002                         if (DBA::isResult($posted_item)) {
2003                                 if ($notify) {
2004                                         Hook::callAll('post_local_end', $posted_item);
2005                                 } else {
2006                                         Hook::callAll('post_remote_end', $posted_item);
2007                                 }
2008                         } else {
2009                                 Logger::log('new item not found in DB, id ' . $current_post);
2010                         }
2011                 }
2012
2013                 if ($item['parent-uri'] === $item['uri']) {
2014                         self::addShadow($current_post);
2015                 } else {
2016                         self::addShadowPost($current_post);
2017                 }
2018
2019                 self::updateContact($item);
2020
2021                 UserItem::setNotification($current_post);
2022
2023                 check_user_notification($current_post);
2024
2025                 if ($notify || ($item['visible'] && ((!empty($parent) && $parent['origin']) || $item['origin']))) {
2026                         Worker::add(['priority' => $priority, 'dont_fork' => true], 'Notifier', $notify_type, $current_post);
2027                 }
2028
2029                 return $current_post;
2030         }
2031
2032         /**
2033          * Insert a new item content entry
2034          *
2035          * @param array $item The item fields that are to be inserted
2036          * @return bool
2037          * @throws \Exception
2038          */
2039         private static function insertActivity(&$item)
2040         {
2041                 $activity_index = self::activityToIndex($item['verb']);
2042
2043                 if ($activity_index < 0) {
2044                         return false;
2045                 }
2046
2047                 $fields = ['activity' => $activity_index, 'uri-hash' => (string)$item['uri-id'], 'uri-id' => $item['uri-id']];
2048
2049                 // We just remove everything that is content
2050                 foreach (array_merge(self::CONTENT_FIELDLIST, self::MIXED_CONTENT_FIELDLIST) as $field) {
2051                         unset($item[$field]);
2052                 }
2053
2054                 // To avoid timing problems, we are using locks.
2055                 $locked = DI::lock()->acquire('item_insert_activity');
2056                 if (!$locked) {
2057                         Logger::log("Couldn't acquire lock for URI " . $item['uri'] . " - proceeding anyway.");
2058                 }
2059
2060                 // Do we already have this content?
2061                 $item_activity = DBA::selectFirst('item-activity', ['id'], ['uri-id' => $item['uri-id']]);
2062                 if (DBA::isResult($item_activity)) {
2063                         $item['iaid'] = $item_activity['id'];
2064                         Logger::log('Fetched activity for URI ' . $item['uri'] . ' (' . $item['iaid'] . ')');
2065                 } elseif (DBA::insert('item-activity', $fields)) {
2066                         $item['iaid'] = DBA::lastInsertId();
2067                         Logger::log('Inserted activity for URI ' . $item['uri'] . ' (' . $item['iaid'] . ')');
2068                 } else {
2069                         // This shouldn't happen.
2070                         Logger::log('Could not insert activity for URI ' . $item['uri'] . ' - should not happen');
2071                         DI::lock()->release('item_insert_activity');
2072                         return false;
2073                 }
2074                 if ($locked) {
2075                         DI::lock()->release('item_insert_activity');
2076                 }
2077                 return true;
2078         }
2079
2080         /**
2081          * Insert a new item content entry
2082          *
2083          * @param array $item The item fields that are to be inserted
2084          * @throws \Exception
2085          */
2086         private static function insertContent(&$item)
2087         {
2088                 $fields = ['uri-plink-hash' => (string)$item['uri-id'], 'uri-id' => $item['uri-id']];
2089
2090                 foreach (array_merge(self::CONTENT_FIELDLIST, self::MIXED_CONTENT_FIELDLIST) as $field) {
2091                         if (isset($item[$field])) {
2092                                 $fields[$field] = $item[$field];
2093                                 unset($item[$field]);
2094                         }
2095                 }
2096
2097                 // To avoid timing problems, we are using locks.
2098                 $locked = DI::lock()->acquire('item_insert_content');
2099                 if (!$locked) {
2100                         Logger::log("Couldn't acquire lock for URI " . $item['uri'] . " - proceeding anyway.");
2101                 }
2102
2103                 // Do we already have this content?
2104                 $item_content = DBA::selectFirst('item-content', ['id'], ['uri-id' => $item['uri-id']]);
2105                 if (DBA::isResult($item_content)) {
2106                         $item['icid'] = $item_content['id'];
2107                         Logger::log('Fetched content for URI ' . $item['uri'] . ' (' . $item['icid'] . ')');
2108                 } elseif (DBA::insert('item-content', $fields)) {
2109                         $item['icid'] = DBA::lastInsertId();
2110                         Logger::log('Inserted content for URI ' . $item['uri'] . ' (' . $item['icid'] . ')');
2111                 } else {
2112                         // This shouldn't happen.
2113                         Logger::log('Could not insert content for URI ' . $item['uri'] . ' - should not happen');
2114                 }
2115                 if ($locked) {
2116                         DI::lock()->release('item_insert_content');
2117                 }
2118         }
2119
2120         /**
2121          * Update existing item content entries
2122          *
2123          * @param array $item      The item fields that are to be changed
2124          * @param array $condition The condition for finding the item content entries
2125          * @return bool
2126          * @throws \Exception
2127          */
2128         private static function updateActivity($item, $condition)
2129         {
2130                 if (empty($item['verb'])) {
2131                         return false;
2132                 }
2133                 $activity_index = self::activityToIndex($item['verb']);
2134
2135                 if ($activity_index < 0) {
2136                         return false;
2137                 }
2138
2139                 $fields = ['activity' => $activity_index];
2140
2141                 Logger::log('Update activity for ' . json_encode($condition));
2142
2143                 DBA::update('item-activity', $fields, $condition, true);
2144
2145                 return true;
2146         }
2147
2148         /**
2149          * Update existing item content entries
2150          *
2151          * @param array $item      The item fields that are to be changed
2152          * @param array $condition The condition for finding the item content entries
2153          * @throws \Exception
2154          */
2155         private static function updateContent($item, $condition)
2156         {
2157                 // We have to select only the fields from the "item-content" table
2158                 $fields = [];
2159                 foreach (array_merge(self::CONTENT_FIELDLIST, self::MIXED_CONTENT_FIELDLIST) as $field) {
2160                         if (isset($item[$field])) {
2161                                 $fields[$field] = $item[$field];
2162                         }
2163                 }
2164
2165                 if (empty($fields)) {
2166                         // when there are no fields at all, just use the condition
2167                         // This is to ensure that we always store content.
2168                         $fields = $condition;
2169                 }
2170
2171                 Logger::log('Update content for ' . json_encode($condition));
2172
2173                 DBA::update('item-content', $fields, $condition, true);
2174         }
2175
2176         /**
2177          * Distributes public items to the receivers
2178          *
2179          * @param integer $itemid      Item ID that should be added
2180          * @param string  $signed_text Original text (for Diaspora signatures), JSON encoded.
2181          * @throws \Exception
2182          */
2183         public static function distribute($itemid, $signed_text = '')
2184         {
2185                 $condition = ["`id` IN (SELECT `parent` FROM `item` WHERE `id` = ?)", $itemid];
2186                 $parent = self::selectFirst(['owner-id'], $condition);
2187                 if (!DBA::isResult($parent)) {
2188                         return;
2189                 }
2190
2191                 // Only distribute public items from native networks
2192                 $condition = ['id' => $itemid, 'uid' => 0,
2193                         'network' => array_merge(Protocol::FEDERATED ,['']),
2194                         'visible' => true, 'deleted' => false, 'moderated' => false, 'private' => false];
2195                 $item = self::selectFirst(self::ITEM_FIELDLIST, $condition);
2196                 if (!DBA::isResult($item)) {
2197                         return;
2198                 }
2199
2200                 $origin = $item['origin'];
2201
2202                 unset($item['id']);
2203                 unset($item['parent']);
2204                 unset($item['mention']);
2205                 unset($item['wall']);
2206                 unset($item['origin']);
2207                 unset($item['starred']);
2208
2209                 $users = [];
2210
2211                 /// @todo add a field "pcid" in the contact table that referrs to the public contact id.
2212                 $owner = DBA::selectFirst('contact', ['url', 'nurl', 'alias'], ['id' => $parent['owner-id']]);
2213                 if (!DBA::isResult($owner)) {
2214                         return;
2215                 }
2216
2217                 $condition = ['nurl' => $owner['nurl'], 'rel' => [Contact::SHARING, Contact::FRIEND]];
2218                 $contacts = DBA::select('contact', ['uid'], $condition);
2219                 while ($contact = DBA::fetch($contacts)) {
2220                         if ($contact['uid'] == 0) {
2221                                 continue;
2222                         }
2223
2224                         $users[$contact['uid']] = $contact['uid'];
2225                 }
2226                 DBA::close($contacts);
2227
2228                 $condition = ['alias' => $owner['url'], 'rel' => [Contact::SHARING, Contact::FRIEND]];
2229                 $contacts = DBA::select('contact', ['uid'], $condition);
2230                 while ($contact = DBA::fetch($contacts)) {
2231                         if ($contact['uid'] == 0) {
2232                                 continue;
2233                         }
2234
2235                         $users[$contact['uid']] = $contact['uid'];
2236                 }
2237                 DBA::close($contacts);
2238
2239                 if (!empty($owner['alias'])) {
2240                         $condition = ['url' => $owner['alias'], 'rel' => [Contact::SHARING, Contact::FRIEND]];
2241                         $contacts = DBA::select('contact', ['uid'], $condition);
2242                         while ($contact = DBA::fetch($contacts)) {
2243                                 if ($contact['uid'] == 0) {
2244                                         continue;
2245                                 }
2246
2247                                 $users[$contact['uid']] = $contact['uid'];
2248                         }
2249                         DBA::close($contacts);
2250                 }
2251
2252                 $origin_uid = 0;
2253
2254                 if ($item['uri'] != $item['parent-uri']) {
2255                         $parents = self::select(['uid', 'origin'], ["`uri` = ? AND `uid` != 0", $item['parent-uri']]);
2256                         while ($parent = self::fetch($parents)) {
2257                                 $users[$parent['uid']] = $parent['uid'];
2258                                 if ($parent['origin'] && !$origin) {
2259                                         $origin_uid = $parent['uid'];
2260                                 }
2261                         }
2262                 }
2263
2264                 foreach ($users as $uid) {
2265                         if ($origin_uid == $uid) {
2266                                 $item['diaspora_signed_text'] = $signed_text;
2267                         }
2268                         self::storeForUser($itemid, $item, $uid);
2269                 }
2270         }
2271
2272         /**
2273          * Store public items for the receivers
2274          *
2275          * @param integer $itemid Item ID that should be added
2276          * @param array   $item   The item entry that will be stored
2277          * @param integer $uid    The user that will receive the item entry
2278          * @throws \Exception
2279          */
2280         private static function storeForUser($itemid, $item, $uid)
2281         {
2282                 $item['uid'] = $uid;
2283                 $item['origin'] = 0;
2284                 $item['wall'] = 0;
2285                 if ($item['uri'] == $item['parent-uri']) {
2286                         $item['contact-id'] = Contact::getIdForURL($item['owner-link'], $uid);
2287                 } else {
2288                         $item['contact-id'] = Contact::getIdForURL($item['author-link'], $uid);
2289                 }
2290
2291                 if (empty($item['contact-id'])) {
2292                         $self = DBA::selectFirst('contact', ['id'], ['self' => true, 'uid' => $uid]);
2293                         if (!DBA::isResult($self)) {
2294                                 return;
2295                         }
2296                         $item['contact-id'] = $self['id'];
2297                 }
2298
2299                 /// @todo Handling of "event-id"
2300
2301                 $notify = false;
2302                 if ($item['uri'] == $item['parent-uri']) {
2303                         $contact = DBA::selectFirst('contact', [], ['id' => $item['contact-id'], 'self' => false]);
2304                         if (DBA::isResult($contact)) {
2305                                 $notify = self::isRemoteSelf($contact, $item);
2306                         }
2307                 }
2308
2309                 $distributed = self::insert($item, false, $notify, true);
2310
2311                 if (!$distributed) {
2312                         Logger::log("Distributed public item " . $itemid . " for user " . $uid . " wasn't stored", Logger::DEBUG);
2313                 } else {
2314                         Logger::log("Distributed public item " . $itemid . " for user " . $uid . " with id " . $distributed, Logger::DEBUG);
2315                 }
2316         }
2317
2318         /**
2319          * Add a shadow entry for a given item id that is a thread starter
2320          *
2321          * We store every public item entry additionally with the user id "0".
2322          * This is used for the community page and for the search.
2323          * It is planned that in the future we will store public item entries only once.
2324          *
2325          * @param integer $itemid Item ID that should be added
2326          * @throws \Exception
2327          */
2328         public static function addShadow($itemid)
2329         {
2330                 $fields = ['uid', 'private', 'moderated', 'visible', 'deleted', 'network', 'uri'];
2331                 $condition = ['id' => $itemid, 'parent' => [0, $itemid]];
2332                 $item = self::selectFirst($fields, $condition);
2333
2334                 if (!DBA::isResult($item)) {
2335                         return;
2336                 }
2337
2338                 // is it already a copy?
2339                 if (($itemid == 0) || ($item['uid'] == 0)) {
2340                         return;
2341                 }
2342
2343                 // Is it a visible public post?
2344                 if (!$item["visible"] || $item["deleted"] || $item["moderated"] || $item["private"]) {
2345                         return;
2346                 }
2347
2348                 // is it an entry from a connector? Only add an entry for natively connected networks
2349                 if (!in_array($item["network"], array_merge(Protocol::FEDERATED ,['']))) {
2350                         return;
2351                 }
2352
2353                 if (self::exists(['uri' => $item['uri'], 'uid' => 0])) {
2354                         return;
2355                 }
2356
2357                 $item = self::selectFirst(self::ITEM_FIELDLIST, ['id' => $itemid]);
2358
2359                 if (DBA::isResult($item)) {
2360                         // Preparing public shadow (removing user specific data)
2361                         $item['uid'] = 0;
2362                         unset($item['id']);
2363                         unset($item['parent']);
2364                         unset($item['wall']);
2365                         unset($item['mention']);
2366                         unset($item['origin']);
2367                         unset($item['starred']);
2368                         unset($item['postopts']);
2369                         unset($item['inform']);
2370                         if ($item['uri'] == $item['parent-uri']) {
2371                                 $item['contact-id'] = $item['owner-id'];
2372                         } else {
2373                                 $item['contact-id'] = $item['author-id'];
2374                         }
2375
2376                         $public_shadow = self::insert($item, false, false, true);
2377
2378                         Logger::log("Stored public shadow for thread ".$itemid." under id ".$public_shadow, Logger::DEBUG);
2379                 }
2380         }
2381
2382         /**
2383          * Add a shadow entry for a given item id that is a comment
2384          *
2385          * This function does the same like the function above - but for comments
2386          *
2387          * @param integer $itemid Item ID that should be added
2388          * @throws \Exception
2389          */
2390         public static function addShadowPost($itemid)
2391         {
2392                 $item = self::selectFirst(self::ITEM_FIELDLIST, ['id' => $itemid]);
2393                 if (!DBA::isResult($item)) {
2394                         return;
2395                 }
2396
2397                 // Is it a toplevel post?
2398                 if ($item['id'] == $item['parent']) {
2399                         self::addShadow($itemid);
2400                         return;
2401                 }
2402
2403                 // Is this a shadow entry?
2404                 if ($item['uid'] == 0) {
2405                         return;
2406                 }
2407
2408                 // Is there a shadow parent?
2409                 if (!self::exists(['uri' => $item['parent-uri'], 'uid' => 0])) {
2410                         return;
2411                 }
2412
2413                 // Is there already a shadow entry?
2414                 if (self::exists(['uri' => $item['uri'], 'uid' => 0])) {
2415                         return;
2416                 }
2417
2418                 // Save "origin" and "parent" state
2419                 $origin = $item['origin'];
2420                 $parent = $item['parent'];
2421
2422                 // Preparing public shadow (removing user specific data)
2423                 $item['uid'] = 0;
2424                 unset($item['id']);
2425                 unset($item['parent']);
2426                 unset($item['wall']);
2427                 unset($item['mention']);
2428                 unset($item['origin']);
2429                 unset($item['starred']);
2430                 unset($item['postopts']);
2431                 unset($item['inform']);
2432                 $item['contact-id'] = Contact::getIdForURL($item['author-link']);
2433
2434                 $public_shadow = self::insert($item, false, false, true);
2435
2436                 Logger::log("Stored public shadow for comment ".$item['uri']." under id ".$public_shadow, Logger::DEBUG);
2437
2438                 // If this was a comment to a Diaspora post we don't get our comment back.
2439                 // This means that we have to distribute the comment by ourselves.
2440                 if ($origin && self::exists(['id' => $parent, 'network' => Protocol::DIASPORA])) {
2441                         self::distribute($public_shadow);
2442                 }
2443         }
2444
2445         /**
2446          * Adds a language specification in a "language" element of given $arr.
2447          * Expects "body" element to exist in $arr.
2448          *
2449          * @param $item
2450          * @throws \Text_LanguageDetect_Exception
2451          */
2452         private static function addLanguageToItemArray(&$item)
2453         {
2454                 $naked_body = BBCode::toPlaintext($item['body'], false);
2455
2456                 $ld = new Text_LanguageDetect();
2457                 $ld->setNameMode(2);
2458                 $languages = $ld->detect($naked_body, 3);
2459
2460                 if (is_array($languages)) {
2461                         $item['language'] = json_encode($languages);
2462                 }
2463         }
2464
2465         /**
2466          * Creates an unique guid out of a given uri
2467          *
2468          * @param string $uri uri of an item entry
2469          * @param string $host hostname for the GUID prefix
2470          * @return string unique guid
2471          */
2472         public static function guidFromUri($uri, $host)
2473         {
2474                 // Our regular guid routine is using this kind of prefix as well
2475                 // We have to avoid that different routines could accidentally create the same value
2476                 $parsed = parse_url($uri);
2477
2478                 // We use a hash of the hostname as prefix for the guid
2479                 $guid_prefix = hash("crc32", $host);
2480
2481                 // Remove the scheme to make sure that "https" and "http" doesn't make a difference
2482                 unset($parsed["scheme"]);
2483
2484                 // Glue it together to be able to make a hash from it
2485                 $host_id = implode("/", $parsed);
2486
2487                 // We could use any hash algorithm since it isn't a security issue
2488                 $host_hash = hash("ripemd128", $host_id);
2489
2490                 return $guid_prefix.$host_hash;
2491         }
2492
2493         /**
2494          * generate an unique URI
2495          *
2496          * @param integer $uid  User id
2497          * @param string  $guid An existing GUID (Otherwise it will be generated)
2498          *
2499          * @return string
2500          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
2501          */
2502         public static function newURI($uid, $guid = "")
2503         {
2504                 if ($guid == "") {
2505                         $guid = System::createUUID();
2506                 }
2507
2508                 return DI::baseUrl()->get() . '/objects/' . $guid;
2509         }
2510
2511         /**
2512          * Set "success_update" and "last-item" to the date of the last time we heard from this contact
2513          *
2514          * This can be used to filter for inactive contacts.
2515          * Only do this for public postings to avoid privacy problems, since poco data is public.
2516          * Don't set this value if it isn't from the owner (could be an author that we don't know)
2517          *
2518          * @param array $arr Contains the just posted item record
2519          * @throws \Exception
2520          */
2521         private static function updateContact($arr)
2522         {
2523                 // Unarchive the author
2524                 $contact = DBA::selectFirst('contact', [], ['id' => $arr["author-id"]]);
2525                 if (DBA::isResult($contact)) {
2526                         Contact::unmarkForArchival($contact);
2527                 }
2528
2529                 // Unarchive the contact if it's not our own contact
2530                 $contact = DBA::selectFirst('contact', [], ['id' => $arr["contact-id"], 'self' => false]);
2531                 if (DBA::isResult($contact)) {
2532                         Contact::unmarkForArchival($contact);
2533                 }
2534
2535                 $update = (!$arr['private'] && ((($arr['author-link'] ?? '') === ($arr['owner-link'] ?? '')) || ($arr["parent-uri"] === $arr["uri"])));
2536
2537                 // Is it a forum? Then we don't care about the rules from above
2538                 if (!$update && in_array($arr["network"], [Protocol::ACTIVITYPUB, Protocol::DFRN]) && ($arr["parent-uri"] === $arr["uri"])) {
2539                         if (DBA::exists('contact', ['id' => $arr['contact-id'], 'forum' => true])) {
2540                                 $update = true;
2541                         }
2542                 }
2543
2544                 if ($update) {
2545                         DBA::update('contact', ['success_update' => $arr['received'], 'last-item' => $arr['received']],
2546                                 ['id' => $arr['contact-id']]);
2547                 }
2548                 // Now do the same for the system wide contacts with uid=0
2549                 if (!$arr['private']) {
2550                         DBA::update('contact', ['success_update' => $arr['received'], 'last-item' => $arr['received']],
2551                                 ['id' => $arr['owner-id']]);
2552
2553                         if ($arr['owner-id'] != $arr['author-id']) {
2554                                 DBA::update('contact', ['success_update' => $arr['received'], 'last-item' => $arr['received']],
2555                                         ['id' => $arr['author-id']]);
2556                         }
2557                 }
2558         }
2559
2560         public static function setHashtags(&$item)
2561         {
2562                 $tags = BBCode::getTags($item["body"]);
2563
2564                 // No hashtags?
2565                 if (!count($tags)) {
2566                         return false;
2567                 }
2568
2569                 // What happens in [code], stays in [code]!
2570                 // escape the # and the [
2571                 // hint: we will also get in trouble with #tags, when we want markdown in posts -> ### Headline 3
2572                 $item["body"] = preg_replace_callback("/\[code(.*?)\](.*?)\[\/code\]/ism",
2573                         function ($match) {
2574                                 // we truly ESCape all # and [ to prevent gettin weird tags in [code] blocks
2575                                 $find = ['#', '['];
2576                                 $replace = [chr(27).'sharp', chr(27).'leftsquarebracket'];
2577                                 return ("[code" . $match[1] . "]" . str_replace($find, $replace, $match[2]) . "[/code]");
2578                         }, $item["body"]);
2579
2580                 // This sorting is important when there are hashtags that are part of other hashtags
2581                 // Otherwise there could be problems with hashtags like #test and #test2
2582                 rsort($tags);
2583
2584                 $URLSearchString = "^\[\]";
2585
2586                 // All hashtags should point to the home server if "local_tags" is activated
2587                 if (DI::config()->get('system', 'local_tags')) {
2588                         $item["body"] = preg_replace("/#\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",
2589                                         "#[url=".DI::baseUrl()."/search?tag=$2]$2[/url]", $item["body"]);
2590
2591                         $item["tag"] = preg_replace("/#\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",
2592                                         "#[url=".DI::baseUrl()."/search?tag=$2]$2[/url]", $item["tag"]);
2593                 }
2594
2595                 // mask hashtags inside of url, bookmarks and attachments to avoid urls in urls
2596                 $item["body"] = preg_replace_callback("/\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",
2597                         function ($match) {
2598                                 return ("[url=" . str_replace("#", "&num;", $match[1]) . "]" . str_replace("#", "&num;", $match[2]) . "[/url]");
2599                         }, $item["body"]);
2600
2601                 $item["body"] = preg_replace_callback("/\[bookmark\=([$URLSearchString]*)\](.*?)\[\/bookmark\]/ism",
2602                         function ($match) {
2603                                 return ("[bookmark=" . str_replace("#", "&num;", $match[1]) . "]" . str_replace("#", "&num;", $match[2]) . "[/bookmark]");
2604                         }, $item["body"]);
2605
2606                 $item["body"] = preg_replace_callback("/\[attachment (.*)\](.*?)\[\/attachment\]/ism",
2607                         function ($match) {
2608                                 return ("[attachment " . str_replace("#", "&num;", $match[1]) . "]" . $match[2] . "[/attachment]");
2609                         }, $item["body"]);
2610
2611                 // Repair recursive urls
2612                 $item["body"] = preg_replace("/&num;\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",
2613                                 "&num;$2", $item["body"]);
2614
2615                 foreach ($tags as $tag) {
2616                         if ((strpos($tag, '#') !== 0) || strpos($tag, '[url=') || strlen($tag) < 2 || $tag[1] == '#') {
2617                                 continue;
2618                         }
2619
2620                         $basetag = str_replace('_',' ',substr($tag,1));
2621                         $newtag = '#[url=' . DI::baseUrl() . '/search?tag=' . $basetag . ']' . $basetag . '[/url]';
2622
2623                         $item["body"] = str_replace($tag, $newtag, $item["body"]);
2624
2625                         if (!stristr($item["tag"], "/search?tag=" . $basetag . "]" . $basetag . "[/url]")) {
2626                                 if (strlen($item["tag"])) {
2627                                         $item["tag"] = ',' . $item["tag"];
2628                                 }
2629                                 $item["tag"] = $newtag . $item["tag"];
2630                         }
2631                 }
2632
2633                 // Convert back the masked hashtags
2634                 $item["body"] = str_replace("&num;", "#", $item["body"]);
2635
2636                 // Remember! What happens in [code], stays in [code]
2637                 // roleback the # and [
2638                 $item["body"] = preg_replace_callback("/\[code(.*?)\](.*?)\[\/code\]/ism",
2639                         function ($match) {
2640                                 // we truly unESCape all sharp and leftsquarebracket
2641                                 $find = [chr(27).'sharp', chr(27).'leftsquarebracket'];
2642                                 $replace = ['#', '['];
2643                                 return ("[code" . $match[1] . "]" . str_replace($find, $replace, $match[2]) . "[/code]");
2644                         }, $item["body"]);
2645         }
2646
2647         /**
2648          * look for mention tags and setup a second delivery chain for forum/community posts if appropriate
2649          *
2650          * @param int $uid
2651          * @param int $item_id
2652          * @return boolean true if item was deleted, else false
2653          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
2654          * @throws \ImagickException
2655          */
2656         private static function tagDeliver($uid, $item_id)
2657         {
2658                 $mention = false;
2659
2660                 $user = DBA::selectFirst('user', [], ['uid' => $uid]);
2661                 if (!DBA::isResult($user)) {
2662                         return false;
2663                 }
2664
2665                 $community_page = (($user['page-flags'] == User::PAGE_FLAGS_COMMUNITY) ? true : false);
2666                 $prvgroup = (($user['page-flags'] == User::PAGE_FLAGS_PRVGROUP) ? true : false);
2667
2668                 $item = self::selectFirst(self::ITEM_FIELDLIST, ['id' => $item_id]);
2669                 if (!DBA::isResult($item)) {
2670                         return false;
2671                 }
2672
2673                 $link = Strings::normaliseLink(DI::baseUrl() . '/profile/' . $user['nickname']);
2674
2675                 /*
2676                  * Diaspora uses their own hardwired link URL in @-tags
2677                  * instead of the one we supply with webfinger
2678                  */
2679                 $dlink = Strings::normaliseLink(DI::baseUrl() . '/u/' . $user['nickname']);
2680
2681                 $cnt = preg_match_all('/[\@\!]\[url\=(.*?)\](.*?)\[\/url\]/ism', $item['body'], $matches, PREG_SET_ORDER);
2682                 if ($cnt) {
2683                         foreach ($matches as $mtch) {
2684                                 if (Strings::compareLink($link, $mtch[1]) || Strings::compareLink($dlink, $mtch[1])) {
2685                                         $mention = true;
2686                                         Logger::log('mention found: ' . $mtch[2]);
2687                                 }
2688                         }
2689                 }
2690
2691                 if (!$mention) {
2692                         if (($community_page || $prvgroup) &&
2693                                   !$item['wall'] && !$item['origin'] && ($item['id'] == $item['parent'])) {
2694                                 // mmh.. no mention.. community page or private group... no wall.. no origin.. top-post (not a comment)
2695                                 // delete it!
2696                                 Logger::log("no-mention top-level post to community or private group. delete.");
2697                                 DBA::delete('item', ['id' => $item_id]);
2698                                 return true;
2699                         }
2700                         return false;
2701                 }
2702
2703                 $arr = ['item' => $item, 'user' => $user];
2704
2705                 Hook::callAll('tagged', $arr);
2706
2707                 if (!$community_page && !$prvgroup) {
2708                         return false;
2709                 }
2710
2711                 /*
2712                  * tgroup delivery - setup a second delivery chain
2713                  * prevent delivery looping - only proceed
2714                  * if the message originated elsewhere and is a top-level post
2715                  */
2716                 if ($item['wall'] || $item['origin'] || ($item['id'] != $item['parent'])) {
2717                         return false;
2718                 }
2719
2720                 // now change this copy of the post to a forum head message and deliver to all the tgroup members
2721                 $self = DBA::selectFirst('contact', ['id', 'name', 'url', 'thumb'], ['uid' => $uid, 'self' => true]);
2722                 if (!DBA::isResult($self)) {
2723                         return false;
2724                 }
2725
2726                 $owner_id = Contact::getIdForURL($self['url']);
2727
2728                 // also reset all the privacy bits to the forum default permissions
2729
2730                 $private = ($user['allow_cid'] || $user['allow_gid'] || $user['deny_cid'] || $user['deny_gid']) ? 1 : 0;
2731
2732                 $psid = PermissionSet::fetchIDForPost($user);
2733
2734                 $forum_mode = ($prvgroup ? 2 : 1);
2735
2736                 $fields = ['wall' => true, 'origin' => true, 'forum_mode' => $forum_mode, 'contact-id' => $self['id'],
2737                         'owner-id' => $owner_id, 'private' => $private, 'psid' => $psid];
2738                 self::update($fields, ['id' => $item_id]);
2739
2740                 self::updateThread($item_id);
2741
2742                 Worker::add(['priority' => PRIORITY_HIGH, 'dont_fork' => true], 'Notifier', Delivery::POST, $item_id);
2743
2744                 return false;
2745         }
2746
2747         public static function isRemoteSelf($contact, &$datarray)
2748         {
2749                 if (!$contact['remote_self']) {
2750                         return false;
2751                 }
2752
2753                 // Prevent the forwarding of posts that are forwarded
2754                 if (!empty($datarray["extid"]) && ($datarray["extid"] == Protocol::DFRN)) {
2755                         Logger::log('Already forwarded', Logger::DEBUG);
2756                         return false;
2757                 }
2758
2759                 // Prevent to forward already forwarded posts
2760                 if ($datarray["app"] == DI::baseUrl()->getHostname()) {
2761                         Logger::log('Already forwarded (second test)', Logger::DEBUG);
2762                         return false;
2763                 }
2764
2765                 // Only forward posts
2766                 if ($datarray["verb"] != Activity::POST) {
2767                         Logger::log('No post', Logger::DEBUG);
2768                         return false;
2769                 }
2770
2771                 if (($contact['network'] != Protocol::FEED) && $datarray['private']) {
2772                         Logger::log('Not public', Logger::DEBUG);
2773                         return false;
2774                 }
2775
2776                 $datarray2 = $datarray;
2777                 Logger::log('remote-self start - Contact '.$contact['url'].' - '.$contact['remote_self'].' Item '.print_r($datarray, true), Logger::DEBUG);
2778                 if ($contact['remote_self'] == 2) {
2779                         $self = DBA::selectFirst('contact', ['id', 'name', 'url', 'thumb'],
2780                                         ['uid' => $contact['uid'], 'self' => true]);
2781                         if (DBA::isResult($self)) {
2782                                 $datarray['contact-id'] = $self["id"];
2783
2784                                 $datarray['owner-name'] = $self["name"];
2785                                 $datarray['owner-link'] = $self["url"];
2786                                 $datarray['owner-avatar'] = $self["thumb"];
2787
2788                                 $datarray['author-name']   = $datarray['owner-name'];
2789                                 $datarray['author-link']   = $datarray['owner-link'];
2790                                 $datarray['author-avatar'] = $datarray['owner-avatar'];
2791
2792                                 unset($datarray['edited']);
2793
2794                                 unset($datarray['network']);
2795                                 unset($datarray['owner-id']);
2796                                 unset($datarray['author-id']);
2797                         }
2798
2799                         if ($contact['network'] != Protocol::FEED) {
2800                                 $datarray["guid"] = System::createUUID();
2801                                 unset($datarray["plink"]);
2802                                 $datarray["uri"] = self::newURI($contact['uid'], $datarray["guid"]);
2803                                 $datarray["parent-uri"] = $datarray["uri"];
2804                                 $datarray["thr-parent"] = $datarray["uri"];
2805                                 $datarray["extid"] = Protocol::DFRN;
2806                                 $urlpart = parse_url($datarray2['author-link']);
2807                                 $datarray["app"] = $urlpart["host"];
2808                         } else {
2809                                 $datarray['private'] = 0;
2810                         }
2811                 }
2812
2813                 if ($contact['network'] != Protocol::FEED) {
2814                         // Store the original post
2815                         $result = self::insert($datarray2, false, false);
2816                         Logger::log('remote-self post original item - Contact '.$contact['url'].' return '.$result.' Item '.print_r($datarray2, true), Logger::DEBUG);
2817                 } else {
2818                         $datarray["app"] = "Feed";
2819                         $result = true;
2820                 }
2821
2822                 // Trigger automatic reactions for addons
2823                 $datarray['api_source'] = true;
2824
2825                 // We have to tell the hooks who we are - this really should be improved
2826                 $_SESSION["authenticated"] = true;
2827                 $_SESSION["uid"] = $contact['uid'];
2828
2829                 return $result;
2830         }
2831
2832         /**
2833          *
2834          * @param string $s
2835          * @param int    $uid
2836          * @param array  $item
2837          * @param int    $cid
2838          * @return string
2839          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
2840          * @throws \ImagickException
2841          */
2842         public static function fixPrivatePhotos($s, $uid, $item = null, $cid = 0)
2843         {
2844                 if (DI::config()->get('system', 'disable_embedded')) {
2845                         return $s;
2846                 }
2847
2848                 Logger::log('check for photos', Logger::DEBUG);
2849                 $site = substr(DI::baseUrl(), strpos(DI::baseUrl(), '://'));
2850
2851                 $orig_body = $s;
2852                 $new_body = '';
2853
2854                 $img_start = strpos($orig_body, '[img');
2855                 $img_st_close = ($img_start !== false ? strpos(substr($orig_body, $img_start), ']') : false);
2856                 $img_len = ($img_start !== false ? strpos(substr($orig_body, $img_start + $img_st_close + 1), '[/img]') : false);
2857
2858                 while (($img_st_close !== false) && ($img_len !== false)) {
2859                         $img_st_close++; // make it point to AFTER the closing bracket
2860                         $image = substr($orig_body, $img_start + $img_st_close, $img_len);
2861
2862                         Logger::log('found photo ' . $image, Logger::DEBUG);
2863
2864                         if (stristr($image, $site . '/photo/')) {
2865                                 // Only embed locally hosted photos
2866                                 $replace = false;
2867                                 $i = basename($image);
2868                                 $i = str_replace(['.jpg', '.png', '.gif'], ['', '', ''], $i);
2869                                 $x = strpos($i, '-');
2870
2871                                 if ($x) {
2872                                         $res = substr($i, $x + 1);
2873                                         $i = substr($i, 0, $x);
2874                                         $photo = Photo::getPhotoForUser($uid, $i, $res);
2875                                         if (DBA::isResult($photo)) {
2876                                                 /*
2877                                                  * Check to see if we should replace this photo link with an embedded image
2878                                                  * 1. No need to do so if the photo is public
2879                                                  * 2. If there's a contact-id provided, see if they're in the access list
2880                                                  *    for the photo. If so, embed it.
2881                                                  * 3. Otherwise, if we have an item, see if the item permissions match the photo
2882                                                  *    permissions, regardless of order but first check to see if they're an exact
2883                                                  *    match to save some processing overhead.
2884                                                  */
2885                                                 if (self::hasPermissions($photo)) {
2886                                                         if ($cid) {
2887                                                                 $recips = self::enumeratePermissions($photo);
2888                                                                 if (in_array($cid, $recips)) {
2889                                                                         $replace = true;
2890                                                                 }
2891                                                         } elseif ($item) {
2892                                                                 if (self::samePermissions($uid, $item, $photo)) {
2893                                                                         $replace = true;
2894                                                                 }
2895                                                         }
2896                                                 }
2897                                                 if ($replace) {
2898                                                         $photo_img = Photo::getImageForPhoto($photo);
2899                                                         // If a custom width and height were specified, apply before embedding
2900                                                         if (preg_match("/\[img\=([0-9]*)x([0-9]*)\]/is", substr($orig_body, $img_start, $img_st_close), $match)) {
2901                                                                 Logger::log('scaling photo', Logger::DEBUG);
2902
2903                                                                 $width = intval($match[1]);
2904                                                                 $height = intval($match[2]);
2905
2906                                                                 $photo_img->scaleDown(max($width, $height));
2907                                                         }
2908
2909                                                         $data = $photo_img->asString();
2910                                                         $type = $photo_img->getType();
2911
2912                                                         Logger::log('replacing photo', Logger::DEBUG);
2913                                                         $image = 'data:' . $type . ';base64,' . base64_encode($data);
2914                                                         Logger::log('replaced: ' . $image, Logger::DATA);
2915                                                 }
2916                                         }
2917                                 }
2918                         }
2919
2920                         $new_body = $new_body . substr($orig_body, 0, $img_start + $img_st_close) . $image . '[/img]';
2921                         $orig_body = substr($orig_body, $img_start + $img_st_close + $img_len + strlen('[/img]'));
2922                         if ($orig_body === false) {
2923                                 $orig_body = '';
2924                         }
2925
2926                         $img_start = strpos($orig_body, '[img');
2927                         $img_st_close = ($img_start !== false ? strpos(substr($orig_body, $img_start), ']') : false);
2928                         $img_len = ($img_start !== false ? strpos(substr($orig_body, $img_start + $img_st_close + 1), '[/img]') : false);
2929                 }
2930
2931                 $new_body = $new_body . $orig_body;
2932
2933                 return $new_body;
2934         }
2935
2936         private static function hasPermissions($obj)
2937         {
2938                 return !empty($obj['allow_cid']) || !empty($obj['allow_gid']) ||
2939                         !empty($obj['deny_cid']) || !empty($obj['deny_gid']);
2940         }
2941
2942         private static function samePermissions($uid, $obj1, $obj2)
2943         {
2944                 // first part is easy. Check that these are exactly the same.
2945                 if (($obj1['allow_cid'] == $obj2['allow_cid'])
2946                         && ($obj1['allow_gid'] == $obj2['allow_gid'])
2947                         && ($obj1['deny_cid'] == $obj2['deny_cid'])
2948                         && ($obj1['deny_gid'] == $obj2['deny_gid'])) {
2949                         return true;
2950                 }
2951
2952                 // This is harder. Parse all the permissions and compare the resulting set.
2953                 $recipients1 = self::enumeratePermissions($obj1);
2954                 $recipients2 = self::enumeratePermissions($obj2);
2955                 sort($recipients1);
2956                 sort($recipients2);
2957
2958                 /// @TODO Comparison of arrays, maybe use array_diff_assoc() here?
2959                 return ($recipients1 == $recipients2);
2960         }
2961
2962         /**
2963          * Returns an array of contact-ids that are allowed to see this object
2964          *
2965          * @param array $obj        Item array with at least uid, allow_cid, allow_gid, deny_cid and deny_gid
2966          * @param bool  $check_dead Prunes unavailable contacts from the result
2967          * @return array
2968          * @throws \Exception
2969          */
2970         public static function enumeratePermissions(array $obj, bool $check_dead = false)
2971         {
2972                 $aclFormater = DI::aclFormatter();
2973
2974                 $allow_people = $aclFormater->expand($obj['allow_cid']);
2975                 $allow_groups = Group::expand($obj['uid'], $aclFormater->expand($obj['allow_gid']), $check_dead);
2976                 $deny_people  = $aclFormater->expand($obj['deny_cid']);
2977                 $deny_groups  = Group::expand($obj['uid'], $aclFormater->expand($obj['deny_gid']), $check_dead);
2978                 $recipients   = array_unique(array_merge($allow_people, $allow_groups));
2979                 $deny         = array_unique(array_merge($deny_people, $deny_groups));
2980                 $recipients   = array_diff($recipients, $deny);
2981                 return $recipients;
2982         }
2983
2984         public static function getFeedTags($item)
2985         {
2986                 $ret = [];
2987                 $matches = false;
2988                 $cnt = preg_match_all('|\#\[url\=(.*?)\](.*?)\[\/url\]|', $item['tag'], $matches);
2989                 if ($cnt) {
2990                         for ($x = 0; $x < $cnt; $x ++) {
2991                                 if ($matches[1][$x]) {
2992                                         $ret[$matches[2][$x]] = ['#', $matches[1][$x], $matches[2][$x]];
2993                                 }
2994                         }
2995                 }
2996                 $matches = false;
2997                 $cnt = preg_match_all('|\@\[url\=(.*?)\](.*?)\[\/url\]|', $item['tag'], $matches);
2998                 if ($cnt) {
2999                         for ($x = 0; $x < $cnt; $x ++) {
3000                                 if ($matches[1][$x]) {
3001                                         $ret[] = ['@', $matches[1][$x], $matches[2][$x]];
3002                                 }
3003                         }
3004                 }
3005                 return $ret;
3006         }
3007
3008         public static function expire($uid, $days, $network = "", $force = false)
3009         {
3010                 if (!$uid || ($days < 1)) {
3011                         return;
3012                 }
3013
3014                 $condition = ["`uid` = ? AND NOT `deleted` AND `id` = `parent` AND `gravity` = ?",
3015                         $uid, GRAVITY_PARENT];
3016
3017                 /*
3018                  * $expire_network_only = save your own wall posts
3019                  * and just expire conversations started by others
3020                  */
3021                 $expire_network_only = DI::pConfig()->get($uid, 'expire', 'network_only', false);
3022
3023                 if ($expire_network_only) {
3024                         $condition[0] .= " AND NOT `wall`";
3025                 }
3026
3027                 if ($network != "") {
3028                         $condition[0] .= " AND `network` = ?";
3029                         $condition[] = $network;
3030                 }
3031
3032                 $condition[0] .= " AND `received` < UTC_TIMESTAMP() - INTERVAL ? DAY";
3033                 $condition[] = $days;
3034
3035                 $items = self::select(['file', 'resource-id', 'starred', 'type', 'id', 'post-type'], $condition);
3036
3037                 if (!DBA::isResult($items)) {
3038                         return;
3039                 }
3040
3041                 $expire_items = DI::pConfig()->get($uid, 'expire', 'items', true);
3042
3043                 // Forcing expiring of items - but not notes and marked items
3044                 if ($force) {
3045                         $expire_items = true;
3046                 }
3047
3048                 $expire_notes = DI::pConfig()->get($uid, 'expire', 'notes', true);
3049                 $expire_starred = DI::pConfig()->get($uid, 'expire', 'starred', true);
3050                 $expire_photos = DI::pConfig()->get($uid, 'expire', 'photos', false);
3051
3052                 $expired = 0;
3053
3054                 while ($item = Item::fetch($items)) {
3055                         // don't expire filed items
3056
3057                         if (strpos($item['file'], '[') !== false) {
3058                                 continue;
3059                         }
3060
3061                         // Only expire posts, not photos and photo comments
3062
3063                         if (!$expire_photos && strlen($item['resource-id'])) {
3064                                 continue;
3065                         } elseif (!$expire_starred && intval($item['starred'])) {
3066                                 continue;
3067                         } elseif (!$expire_notes && (($item['type'] == 'note') || ($item['post-type'] == Item::PT_PERSONAL_NOTE))) {
3068                                 continue;
3069                         } elseif (!$expire_items && ($item['type'] != 'note') && ($item['post-type'] != Item::PT_PERSONAL_NOTE)) {
3070                                 continue;
3071                         }
3072
3073                         self::deleteById($item['id'], PRIORITY_LOW);
3074
3075                         ++$expired;
3076                 }
3077                 DBA::close($items);
3078                 Logger::log('User ' . $uid . ": expired $expired items; expire items: $expire_items, expire notes: $expire_notes, expire starred: $expire_starred, expire photos: $expire_photos");
3079         }
3080
3081         public static function firstPostDate($uid, $wall = false)
3082         {
3083                 $condition = ['uid' => $uid, 'wall' => $wall, 'deleted' => false, 'visible' => true, 'moderated' => false];
3084                 $params = ['order' => ['received' => false]];
3085                 $thread = DBA::selectFirst('thread', ['received'], $condition, $params);
3086                 if (DBA::isResult($thread)) {
3087                         return substr(DateTimeFormat::local($thread['received']), 0, 10);
3088                 }
3089                 return false;
3090         }
3091
3092         /**
3093          * add/remove activity to an item
3094          *
3095          * Toggle activities as like,dislike,attend of an item
3096          *
3097          * @param string $item_id
3098          * @param string $verb
3099          *            Activity verb. One of
3100          *            like, unlike, dislike, undislike, attendyes, unattendyes,
3101          *            attendno, unattendno, attendmaybe, unattendmaybe
3102          * @return bool
3103          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
3104          * @throws \ImagickException
3105          * @hook  'post_local_end'
3106          *            array $arr
3107          *            'post_id' => ID of posted item
3108          */
3109         public static function performLike($item_id, $verb)
3110         {
3111                 if (!Session::isAuthenticated()) {
3112                         return false;
3113                 }
3114
3115                 switch ($verb) {
3116                         case 'like':
3117                         case 'unlike':
3118                                 $activity = Activity::LIKE;
3119                                 break;
3120                         case 'dislike':
3121                         case 'undislike':
3122                                 $activity = Activity::DISLIKE;
3123                                 break;
3124                         case 'attendyes':
3125                         case 'unattendyes':
3126                                 $activity = Activity::ATTEND;
3127                                 break;
3128                         case 'attendno':
3129                         case 'unattendno':
3130                                 $activity = Activity::ATTENDNO;
3131                                 break;
3132                         case 'attendmaybe':
3133                         case 'unattendmaybe':
3134                                 $activity = Activity::ATTENDMAYBE;
3135                                 break;
3136                         default:
3137                                 Logger::log('like: unknown verb ' . $verb . ' for item ' . $item_id);
3138                                 return false;
3139                 }
3140
3141                 // Enable activity toggling instead of on/off
3142                 $event_verb_flag = $activity === Activity::ATTEND || $activity === Activity::ATTENDNO || $activity === Activity::ATTENDMAYBE;
3143
3144                 Logger::log('like: verb ' . $verb . ' item ' . $item_id);
3145
3146                 $item = self::selectFirst(self::ITEM_FIELDLIST, ['`id` = ? OR `uri` = ?', $item_id, $item_id]);
3147                 if (!DBA::isResult($item)) {
3148                         Logger::log('like: unknown item ' . $item_id);
3149                         return false;
3150                 }
3151
3152                 $item_uri = $item['uri'];
3153
3154                 $uid = $item['uid'];
3155                 if (($uid == 0) && local_user()) {
3156                         $uid = local_user();
3157                 }
3158
3159                 if (!Security::canWriteToUserWall($uid)) {
3160                         Logger::log('like: unable to write on wall ' . $uid);
3161                         return false;
3162                 }
3163
3164                 // Retrieves the local post owner
3165                 $owner_self_contact = DBA::selectFirst('contact', [], ['uid' => $uid, 'self' => true]);
3166                 if (!DBA::isResult($owner_self_contact)) {
3167                         Logger::log('like: unknown owner ' . $uid);
3168                         return false;
3169                 }
3170
3171                 // Retrieve the current logged in user's public contact
3172                 $author_id = public_contact();
3173
3174                 $author_contact = DBA::selectFirst('contact', ['url'], ['id' => $author_id]);
3175                 if (!DBA::isResult($author_contact)) {
3176                         Logger::log('like: unknown author ' . $author_id);
3177                         return false;
3178                 }
3179
3180                 // Contact-id is the uid-dependant author contact
3181                 if (local_user() == $uid) {
3182                         $item_contact_id = $owner_self_contact['id'];
3183                 } else {
3184                         $item_contact_id = Contact::getIdForURL($author_contact['url'], $uid, true);
3185                         $item_contact = DBA::selectFirst('contact', [], ['id' => $item_contact_id]);
3186                         if (!DBA::isResult($item_contact)) {
3187                                 Logger::log('like: unknown item contact ' . $item_contact_id);
3188                                 return false;
3189                         }
3190                 }
3191
3192                 // Look for an existing verb row
3193                 // event participation are essentially radio toggles. If you make a subsequent choice,
3194                 // we need to eradicate your first choice.
3195                 if ($event_verb_flag) {
3196                         $verbs = [Activity::ATTEND, Activity::ATTENDNO, Activity::ATTENDMAYBE];
3197
3198                         // Translate to the index based activity index
3199                         $activities = [];
3200                         foreach ($verbs as $verb) {
3201                                 $activities[] = self::activityToIndex($verb);
3202                         }
3203                 } else {
3204                         $activities = self::activityToIndex($activity);
3205                 }
3206
3207                 $condition = ['activity' => $activities, 'deleted' => false, 'gravity' => GRAVITY_ACTIVITY,
3208                         'author-id' => $author_id, 'uid' => $item['uid'], 'thr-parent' => $item_uri];
3209
3210                 $like_item = self::selectFirst(['id', 'guid', 'verb'], $condition);
3211
3212                 // If it exists, mark it as deleted
3213                 if (DBA::isResult($like_item)) {
3214                         self::deleteById($like_item['id']);
3215
3216                         if (!$event_verb_flag || $like_item['verb'] == $activity) {
3217                                 return true;
3218                         }
3219                 }
3220
3221                 // Verb is "un-something", just trying to delete existing entries
3222                 if (strpos($verb, 'un') === 0) {
3223                         return true;
3224                 }
3225
3226                 $objtype = $item['resource-id'] ? Activity\ObjectType::IMAGE : Activity\ObjectType::NOTE;
3227
3228                 $new_item = [
3229                         'guid'          => System::createUUID(),
3230                         'uri'           => self::newURI($item['uid']),
3231                         'uid'           => $item['uid'],
3232                         'contact-id'    => $item_contact_id,
3233                         'wall'          => $item['wall'],
3234                         'origin'        => 1,
3235                         'network'       => Protocol::DFRN,
3236                         'gravity'       => GRAVITY_ACTIVITY,
3237                         'parent'        => $item['id'],
3238                         'parent-uri'    => $item['uri'],
3239                         'thr-parent'    => $item['uri'],
3240                         'owner-id'      => $author_id,
3241                         'author-id'     => $author_id,
3242                         'body'          => $activity,
3243                         'verb'          => $activity,
3244                         'object-type'   => $objtype,
3245                         'allow_cid'     => $item['allow_cid'],
3246                         'allow_gid'     => $item['allow_gid'],
3247                         'deny_cid'      => $item['deny_cid'],
3248                         'deny_gid'      => $item['deny_gid'],
3249                         'visible'       => 1,
3250                         'unseen'        => 1,
3251                 ];
3252
3253                 $signed = Diaspora::createLikeSignature($uid, $new_item);
3254                 if (!empty($signed)) {
3255                         $new_item['diaspora_signed_text'] = json_encode($signed);
3256                 }
3257
3258                 $new_item_id = self::insert($new_item);
3259
3260                 // If the parent item isn't visible then set it to visible
3261                 if (!$item['visible']) {
3262                         self::update(['visible' => true], ['id' => $item['id']]);
3263                 }
3264
3265                 $new_item['id'] = $new_item_id;
3266
3267                 Hook::callAll('post_local_end', $new_item);
3268
3269                 return true;
3270         }
3271
3272         private static function addThread($itemid, $onlyshadow = false)
3273         {
3274                 $fields = ['uid', 'created', 'edited', 'commented', 'received', 'changed', 'wall', 'private', 'pubmail',
3275                         'moderated', 'visible', 'starred', 'contact-id', 'post-type',
3276                         'deleted', 'origin', 'forum_mode', 'mention', 'network', 'author-id', 'owner-id'];
3277                 $condition = ["`id` = ? AND (`parent` = ? OR `parent` = 0)", $itemid, $itemid];
3278                 $item = self::selectFirst($fields, $condition);
3279
3280                 if (!DBA::isResult($item)) {
3281                         return;
3282                 }
3283
3284                 $item['iid'] = $itemid;
3285
3286                 if (!$onlyshadow) {
3287                         $result = DBA::insert('thread', $item);
3288
3289                         Logger::log("Add thread for item ".$itemid." - ".print_r($result, true), Logger::DEBUG);
3290                 }
3291         }
3292
3293         private static function updateThread($itemid, $setmention = false)
3294         {
3295                 $fields = ['uid', 'guid', 'created', 'edited', 'commented', 'received', 'changed', 'post-type',
3296                         'wall', 'private', 'pubmail', 'moderated', 'visible', 'starred', 'contact-id',
3297                         'deleted', 'origin', 'forum_mode', 'network', 'author-id', 'owner-id'];
3298                 $condition = ["`id` = ? AND (`parent` = ? OR `parent` = 0)", $itemid, $itemid];
3299
3300                 $item = self::selectFirst($fields, $condition);
3301                 if (!DBA::isResult($item)) {
3302                         return;
3303                 }
3304
3305                 if ($setmention) {
3306                         $item["mention"] = 1;
3307                 }
3308
3309                 $fields = [];
3310
3311                 foreach ($item as $field => $data) {
3312                         if (!in_array($field, ["guid"])) {
3313                                 $fields[$field] = $data;
3314                         }
3315                 }
3316
3317                 $result = DBA::update('thread', $fields, ['iid' => $itemid]);
3318
3319                 Logger::log("Update thread for item ".$itemid." - guid ".$item["guid"]." - ".(int)$result, Logger::DEBUG);
3320         }
3321
3322         private static function deleteThread($itemid, $itemuri = "")
3323         {
3324                 $item = DBA::selectFirst('thread', ['uid'], ['iid' => $itemid]);
3325                 if (!DBA::isResult($item)) {
3326                         Logger::log('No thread found for id '.$itemid, Logger::DEBUG);
3327                         return;
3328                 }
3329
3330                 $result = DBA::delete('thread', ['iid' => $itemid], ['cascade' => false]);
3331
3332                 Logger::log("deleteThread: Deleted thread for item ".$itemid." - ".print_r($result, true), Logger::DEBUG);
3333
3334                 if ($itemuri != "") {
3335                         $condition = ["`uri` = ? AND NOT `deleted` AND NOT (`uid` IN (?, 0))", $itemuri, $item["uid"]];
3336                         if (!self::exists($condition)) {
3337                                 DBA::delete('item', ['uri' => $itemuri, 'uid' => 0]);
3338                                 Logger::log("deleteThread: Deleted shadow for item ".$itemuri, Logger::DEBUG);
3339                         }
3340                 }
3341         }
3342
3343         public static function getPermissionsSQLByUserId($owner_id)
3344         {
3345                 $local_user = local_user();
3346                 $remote_user = Session::getRemoteContactID($owner_id);
3347
3348                 /*
3349                  * Construct permissions
3350                  *
3351                  * default permissions - anonymous user
3352                  */
3353                 $sql = " AND NOT `item`.`private`";
3354
3355                 // Profile owner - everything is visible
3356                 if ($local_user && ($local_user == $owner_id)) {
3357                         $sql = '';
3358                 } elseif ($remote_user) {
3359                         /*
3360                          * Authenticated visitor. Unless pre-verified,
3361                          * check that the contact belongs to this $owner_id
3362                          * and load the groups the visitor belongs to.
3363                          * If pre-verified, the caller is expected to have already
3364                          * done this and passed the groups into this function.
3365                          */
3366                         $set = PermissionSet::get($owner_id, $remote_user);
3367
3368                         if (!empty($set)) {
3369                                 $sql_set = " OR (`item`.`private` IN (1,2) AND `item`.`wall` AND `item`.`psid` IN (" . implode(',', $set) . "))";
3370                         } else {
3371                                 $sql_set = '';
3372                         }
3373
3374                         $sql = " AND (NOT `item`.`private`" . $sql_set . ")";
3375                 }
3376
3377                 return $sql;
3378         }
3379
3380         /**
3381          * get translated item type
3382          *
3383          * @param $item
3384          * @return string
3385          */
3386         public static function postType($item)
3387         {
3388                 if (!empty($item['event-id'])) {
3389                         return DI::l10n()->t('event');
3390                 } elseif (!empty($item['resource-id'])) {
3391                         return DI::l10n()->t('photo');
3392                 } elseif (!empty($item['verb']) && $item['verb'] !== Activity::POST) {
3393                         return DI::l10n()->t('activity');
3394                 } elseif ($item['id'] != $item['parent']) {
3395                         return DI::l10n()->t('comment');
3396                 }
3397
3398                 return DI::l10n()->t('post');
3399         }
3400
3401         /**
3402          * Sets the "rendered-html" field of the provided item
3403          *
3404          * Body is preserved to avoid side-effects as we modify it just-in-time for spoilers and private image links
3405          *
3406          * @param array $item
3407          * @param bool  $update
3408          *
3409          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
3410          * @todo Remove reference, simply return "rendered-html" and "rendered-hash"
3411          */
3412         public static function putInCache(&$item, $update = false)
3413         {
3414                 $body = $item["body"];
3415
3416                 $rendered_hash = $item['rendered-hash'] ?? '';
3417                 $rendered_html = $item['rendered-html'] ?? '';
3418
3419                 if ($rendered_hash == ''
3420                         || $rendered_html == ""
3421                         || $rendered_hash != hash("md5", $item["body"])
3422                         || DI::config()->get("system", "ignore_cache")
3423                 ) {
3424                         self::addRedirToImageTags($item);
3425
3426                         $item["rendered-html"] = BBCode::convert($item["body"]);
3427                         $item["rendered-hash"] = hash("md5", $item["body"]);
3428
3429                         $hook_data = ['item' => $item, 'rendered-html' => $item['rendered-html'], 'rendered-hash' => $item['rendered-hash']];
3430                         Hook::callAll('put_item_in_cache', $hook_data);
3431                         $item['rendered-html'] = $hook_data['rendered-html'];
3432                         $item['rendered-hash'] = $hook_data['rendered-hash'];
3433                         unset($hook_data);
3434
3435                         // Force an update if the generated values differ from the existing ones
3436                         if ($rendered_hash != $item["rendered-hash"]) {
3437                                 $update = true;
3438                         }
3439
3440                         // Only compare the HTML when we forcefully ignore the cache
3441                         if (DI::config()->get("system", "ignore_cache") && ($rendered_html != $item["rendered-html"])) {
3442                                 $update = true;
3443                         }
3444
3445                         if ($update && !empty($item["id"])) {
3446                                 self::update(
3447                                         [
3448                                                 'rendered-html' => $item["rendered-html"],
3449                                                 'rendered-hash' => $item["rendered-hash"]
3450                                         ],
3451                                         ['id' => $item["id"]]
3452                                 );
3453                         }
3454                 }
3455
3456                 $item["body"] = $body;
3457         }
3458
3459         /**
3460          * Find any non-embedded images in private items and add redir links to them
3461          *
3462          * @param array &$item The field array of an item row
3463          */
3464         private static function addRedirToImageTags(array &$item)
3465         {
3466                 $app = DI::app();
3467
3468                 $matches = [];
3469                 $cnt = preg_match_all('|\[img\](http[^\[]*?/photo/[a-fA-F0-9]+?(-[0-9]\.[\w]+?)?)\[\/img\]|', $item['body'], $matches, PREG_SET_ORDER);
3470                 if ($cnt) {
3471                         foreach ($matches as $mtch) {
3472                                 if (strpos($mtch[1], '/redir') !== false) {
3473                                         continue;
3474                                 }
3475
3476                                 if ((local_user() == $item['uid']) && ($item['private'] == 1) && ($item['contact-id'] != $app->contact['id']) && ($item['network'] == Protocol::DFRN)) {
3477                                         $img_url = 'redir/' . $item['contact-id'] . '?url=' . urlencode($mtch[1]);
3478                                         $item['body'] = str_replace($mtch[0], '[img]' . $img_url . '[/img]', $item['body']);
3479                                 }
3480                         }
3481                 }
3482         }
3483
3484         /**
3485          * Given an item array, convert the body element from bbcode to html and add smilie icons.
3486          * If attach is true, also add icons for item attachments.
3487          *
3488          * @param array   $item
3489          * @param boolean $attach
3490          * @param boolean $is_preview
3491          * @return string item body html
3492          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
3493          * @throws \ImagickException
3494          * @hook  prepare_body_init item array before any work
3495          * @hook  prepare_body_content_filter ('item'=>item array, 'filter_reasons'=>string array) before first bbcode to html
3496          * @hook  prepare_body ('item'=>item array, 'html'=>body string, 'is_preview'=>boolean, 'filter_reasons'=>string array) after first bbcode to html
3497          * @hook  prepare_body_final ('item'=>item array, 'html'=>body string) after attach icons and blockquote special case handling (spoiler, author)
3498          */
3499         public static function prepareBody(array &$item, $attach = false, $is_preview = false)
3500         {
3501                 $a = DI::app();
3502                 Hook::callAll('prepare_body_init', $item);
3503
3504                 // In order to provide theme developers more possibilities, event items
3505                 // are treated differently.
3506                 if ($item['object-type'] === Activity\ObjectType::EVENT && isset($item['event-id'])) {
3507                         $ev = Event::getItemHTML($item);
3508                         return $ev;
3509                 }
3510
3511                 $tags = Term::populateTagsFromItem($item);
3512
3513                 $item['tags'] = $tags['tags'];
3514                 $item['hashtags'] = $tags['hashtags'];
3515                 $item['mentions'] = $tags['mentions'];
3516
3517                 // Compile eventual content filter reasons
3518                 $filter_reasons = [];
3519                 if (!$is_preview && public_contact() != $item['author-id']) {
3520                         if (!empty($item['content-warning']) && (!local_user() || !DI::pConfig()->get(local_user(), 'system', 'disable_cw', false))) {
3521                                 $filter_reasons[] = DI::l10n()->t('Content warning: %s', $item['content-warning']);
3522                         }
3523
3524                         $hook_data = [
3525                                 'item' => $item,
3526                                 'filter_reasons' => $filter_reasons
3527                         ];
3528                         Hook::callAll('prepare_body_content_filter', $hook_data);
3529                         $filter_reasons = $hook_data['filter_reasons'];
3530                         unset($hook_data);
3531                 }
3532
3533                 // Update the cached values if there is no "zrl=..." on the links.
3534                 $update = (!Session::isAuthenticated() && ($item["uid"] == 0));
3535
3536                 // Or update it if the current viewer is the intented viewer.
3537                 if (($item["uid"] == local_user()) && ($item["uid"] != 0)) {
3538                         $update = true;
3539                 }
3540
3541                 self::putInCache($item, $update);
3542                 $s = $item["rendered-html"];
3543
3544                 $hook_data = [
3545                         'item' => $item,
3546                         'html' => $s,
3547                         'preview' => $is_preview,
3548                         'filter_reasons' => $filter_reasons
3549                 ];
3550                 Hook::callAll('prepare_body', $hook_data);
3551                 $s = $hook_data['html'];
3552                 unset($hook_data);
3553
3554                 if (!$attach) {
3555                         // Replace the blockquotes with quotes that are used in mails.
3556                         $mailquote = '<blockquote type="cite" class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">';
3557                         $s = str_replace(['<blockquote>', '<blockquote class="spoiler">', '<blockquote class="author">'], [$mailquote, $mailquote, $mailquote], $s);
3558                         return $s;
3559                 }
3560
3561                 $as = '';
3562                 $vhead = false;
3563                 $matches = [];
3564                 preg_match_all('|\[attach\]href=\"(.*?)\" length=\"(.*?)\" type=\"(.*?)\"(?: title=\"(.*?)\")?|', $item['attach'], $matches, PREG_SET_ORDER);
3565                 foreach ($matches as $mtch) {
3566                         $mime = $mtch[3];
3567
3568                         $the_url = Contact::magicLinkById($item['author-id'], $mtch[1]);
3569
3570                         if (strpos($mime, 'video') !== false) {
3571                                 if (!$vhead) {
3572                                         $vhead = true;
3573                                         DI::page()['htmlhead'] .= Renderer::replaceMacros(Renderer::getMarkupTemplate('videos_head.tpl'));
3574                                 }
3575
3576                                 $url_parts = explode('/', $the_url);
3577                                 $id = end($url_parts);
3578                                 $as .= Renderer::replaceMacros(Renderer::getMarkupTemplate('video_top.tpl'), [
3579                                         '$video' => [
3580                                                 'id'     => $id,
3581                                                 'title'  => DI::l10n()->t('View Video'),
3582                                                 'src'    => $the_url,
3583                                                 'mime'   => $mime,
3584                                         ],
3585                                 ]);
3586                         }
3587
3588                         $filetype = strtolower(substr($mime, 0, strpos($mime, '/')));
3589                         if ($filetype) {
3590                                 $filesubtype = strtolower(substr($mime, strpos($mime, '/') + 1));
3591                                 $filesubtype = str_replace('.', '-', $filesubtype);
3592                         } else {
3593                                 $filetype = 'unkn';
3594                                 $filesubtype = 'unkn';
3595                         }
3596
3597                         $title = Strings::escapeHtml(trim(($mtch[4] ?? '') ?: $mtch[1]));
3598                         $title .= ' ' . $mtch[2] . ' ' . DI::l10n()->t('bytes');
3599
3600                         $icon = '<div class="attachtype icon s22 type-' . $filetype . ' subtype-' . $filesubtype . '"></div>';
3601                         $as .= '<a href="' . strip_tags($the_url) . '" title="' . $title . '" class="attachlink" target="_blank" >' . $icon . '</a>';
3602                 }
3603
3604                 if ($as != '') {
3605                         $s .= '<div class="body-attach">'.$as.'<div class="clear"></div></div>';
3606                 }
3607
3608                 // Map.
3609                 if (strpos($s, '<div class="map">') !== false && !empty($item['coord'])) {
3610                         $x = Map::byCoordinates(trim($item['coord']));
3611                         if ($x) {
3612                                 $s = preg_replace('/\<div class\=\"map\"\>/', '$0' . $x, $s);
3613                         }
3614                 }
3615
3616                 // Replace friendica image url size with theme preference.
3617                 if (!empty($a->theme_info['item_image_size'])) {
3618                         $ps = $a->theme_info['item_image_size'];
3619                         $s = preg_replace('|(<img[^>]+src="[^"]+/photo/[0-9a-f]+)-[0-9]|', "$1-" . $ps, $s);
3620                 }
3621
3622                 $s = HTML::applyContentFilter($s, $filter_reasons);
3623
3624                 $hook_data = ['item' => $item, 'html' => $s];
3625                 Hook::callAll('prepare_body_final', $hook_data);
3626
3627                 return $hook_data['html'];
3628         }
3629
3630         /**
3631          * get private link for item
3632          *
3633          * @param array $item
3634          * @return boolean|array False if item has not plink, otherwise array('href'=>plink url, 'title'=>translated title)
3635          * @throws \Exception
3636          */
3637         public static function getPlink($item)
3638         {
3639                 $a = DI::app();
3640
3641                 if ($a->user['nickname'] != "") {
3642                         $ret = [
3643                                 'href' => "display/" . $item['guid'],
3644                                 'orig' => "display/" . $item['guid'],
3645                                 'title' => DI::l10n()->t('View on separate page'),
3646                                 'orig_title' => DI::l10n()->t('view on separate page'),
3647                         ];
3648
3649                         if (!empty($item['plink'])) {
3650                                 $ret["href"] = DI::baseUrl()->remove($item['plink']);
3651                                 $ret["title"] = DI::l10n()->t('link to source');
3652                         }
3653
3654                 } elseif (!empty($item['plink']) && ($item['private'] != 1)) {
3655                         $ret = [
3656                                 'href' => $item['plink'],
3657                                 'orig' => $item['plink'],
3658                                 'title' => DI::l10n()->t('link to source'),
3659                         ];
3660                 } else {
3661                         $ret = [];
3662                 }
3663
3664                 return $ret;
3665         }
3666
3667         /**
3668          * Is the given item array a post that is sent as starting post to a forum?
3669          *
3670          * @param array $item
3671          * @param array $owner
3672          *
3673          * @return boolean "true" when it is a forum post
3674          */
3675         public static function isForumPost(array $item, array $owner = [])
3676         {
3677                 if (empty($owner)) {
3678                         $owner = User::getOwnerDataById($item['uid']);
3679                         if (empty($owner)) {
3680                                 return false;
3681                         }
3682                 }
3683
3684                 if (($item['author-id'] == $item['owner-id']) ||
3685                         ($owner['id'] == $item['contact-id']) ||
3686                         ($item['uri'] != $item['parent-uri']) ||
3687                         $item['origin']) {
3688                         return false;
3689                 }
3690
3691                 return Contact::isForum($item['contact-id']);
3692         }
3693
3694         /**
3695          * Search item id for given URI or plink
3696          *
3697          * @param string $uri
3698          * @param integer $uid
3699          *
3700          * @return integer item id
3701          */
3702         public static function searchByLink($uri, $uid = 0)
3703         {
3704                 $ssl_uri = str_replace('http://', 'https://', $uri);
3705                 $uris = [$uri, $ssl_uri, Strings::normaliseLink($uri)];
3706
3707                 $item = DBA::selectFirst('item', ['id'], ['uri' => $uris, 'uid' => $uid]);
3708                 if (DBA::isResult($item)) {
3709                         return $item['id'];
3710                 }
3711
3712                 $itemcontent = DBA::selectFirst('item-content', ['uri-id'], ['plink' => $uris]);
3713                 if (!DBA::isResult($itemcontent)) {
3714                         return 0;
3715                 }
3716
3717                 $itemuri = DBA::selectFirst('item-uri', ['uri'], ['id' => $itemcontent['uri-id']]);
3718                 if (!DBA::isResult($itemuri)) {
3719                         return 0;
3720                 }
3721
3722                 $item = DBA::selectFirst('item', ['id'], ['uri' => $itemuri['uri'], 'uid' => $uid]);
3723                 if (DBA::isResult($item)) {
3724                         return $item['id'];
3725                 }
3726
3727                 return 0;
3728         }
3729
3730         /**
3731          * Fetches item for given URI or plink
3732          *
3733          * @param string $uri
3734          * @param integer $uid
3735          *
3736          * @return integer item id
3737          */
3738         public static function fetchByLink($uri, $uid = 0)
3739         {
3740                 $item_id = self::searchByLink($uri, $uid);
3741                 if (!empty($item_id)) {
3742                         return $item_id;
3743                 }
3744
3745                 if ($fetched_uri = ActivityPub\Processor::fetchMissingActivity($uri)) {
3746                         $item_id = self::searchByLink($fetched_uri, $uid);
3747                 } else {
3748                         $item_id = Diaspora::fetchByURL($uri);
3749                 }
3750
3751                 if (!empty($item_id)) {
3752                         return $item_id;
3753                 }
3754
3755                 return 0;
3756         }
3757
3758         /**
3759          * Return share data from an item array (if the item is shared item)
3760          * We are providing the complete Item array, because at some time in the future
3761          * we hopefully will define these values not in the body anymore but in some item fields.
3762          * This function is meant to replace all similar functions in the system.
3763          *
3764          * @param array $item
3765          *
3766          * @return array with share information
3767          */
3768         public static function getShareArray($item)
3769         {
3770                 if (!preg_match("/(.*?)\[share(.*?)\]\s?(.*?)\s?\[\/share\]\s?/ism", $item['body'], $matches)) {
3771                         return [];
3772                 }
3773
3774                 $attribute_string = $matches[2];
3775                 $attributes = ['comment' => trim($matches[1]), 'shared' => trim($matches[3])];
3776                 foreach (['author', 'profile', 'avatar', 'guid', 'posted', 'link'] as $field) {
3777                         if (preg_match("/$field=(['\"])(.+?)\\1/ism", $attribute_string, $matches)) {
3778                                 $attributes[$field] = trim(html_entity_decode($matches[2] ?? '', ENT_QUOTES, 'UTF-8'));
3779                         }
3780                 }
3781                 return $attributes;
3782         }
3783
3784         /**
3785          * Fetch item information for shared items from the original items and adds it.
3786          *
3787          * @param array $item
3788          *
3789          * @return array item array with data from the original item
3790          */
3791         public static function addShareDataFromOriginal($item)
3792         {
3793                 $shared = self::getShareArray($item);
3794                 if (empty($shared)) {
3795                         return $item;
3796                 }
3797
3798                 // Real reshares always have got a GUID.
3799                 if (empty($shared['guid'])) {
3800                         return $item;
3801                 }
3802
3803                 $uid = $item['uid'] ?? 0;
3804
3805                 // first try to fetch the item via the GUID. This will work for all reshares that had been created on this system
3806                 $shared_item = self::selectFirst(['title', 'body', 'attach'], ['guid' => $shared['guid'], 'uid' => [0, $uid]]);
3807                 if (!DBA::isResult($shared_item)) {
3808                         // Otherwhise try to find (and possibly fetch) the item via the link. This should work for Diaspora and ActivityPub posts
3809                         $id = self::fetchByLink($shared['link'], $uid);
3810                         if (empty($id)) {
3811                                 Logger::info('Original item not found', ['url' => $shared['link'], 'callstack' => System::callstack()]);
3812                                 return $item;
3813                         }
3814
3815                         $shared_item = self::selectFirst(['title', 'body', 'attach'], ['id' => $id]);
3816                         if (!DBA::isResult($shared_item)) {
3817                                 return $item;
3818                         }
3819                         Logger::info('Got shared data from url', ['url' => $shared['link'], 'callstack' => System::callstack()]);
3820                 } else {
3821                         Logger::info('Got shared data from guid', ['guid' => $shared['guid'], 'callstack' => System::callstack()]);
3822                 }
3823
3824                 if (!empty($shared_item['title'])) {
3825                         $body = '[h3]' . $shared_item['title'] . "[/h3]\n" . $shared_item['body'];
3826                         unset($shared_item['title']);
3827                 } else {
3828                         $body = $shared_item['body'];
3829                 }
3830
3831                 $item['body'] = preg_replace("/\[share ([^\[\]]*)\].*\[\/share\]/ism", '[share $1]' . $body . '[/share]', $item['body']);
3832                 unset($shared_item['body']);
3833
3834                 return array_merge($item, $shared_item);
3835         }
3836 }