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