src/Model/Item.php

   1 <?php
   2
   3 /**
   4  * @file src/Model/Item.php
   5  */
   6
   7 namespace Friendica\Model;
   8
   9 use Friendica\Content\Text\BBCode;
  10 use Friendica\Content\Text\HTML;
  11 use Friendica\Core\Config;
  12 use Friendica\Core\Hook;
  13 use Friendica\Core\Logger;
  14 use Friendica\Core\Protocol;
  15 use Friendica\Core\Renderer;
  16 use Friendica\Core\Session;
  17 use Friendica\Core\System;
  18 use Friendica\Core\Worker;
  19 use Friendica\Database\DBA;
  20 use Friendica\DI;
  21 use Friendica\Protocol\Activity;
  22 use Friendica\Protocol\ActivityPub;
  23 use Friendica\Protocol\Diaspora;
  24 use Friendica\Protocol\OStatus;
  25 use Friendica\Util\DateTimeFormat;
  26 use Friendica\Util\Map;
  27 use Friendica\Util\Network;
  28 use Friendica\Util\Security;
  29 use Friendica\Util\Strings;
  30 use Friendica\Util\XML;
  31 use Friendica\Worker\Delivery;
  32 use Text_LanguageDetect;
  33
  34 class Item
  35 {
  36         // Posting types, inspired by https://www.w3.org/TR/activitystreams-vocabulary/#object-types
  37         const PT_ARTICLE = 0;
  38         const PT_NOTE = 1;
  39         const PT_PAGE = 2;
  40         const PT_IMAGE = 16;
  41         const PT_AUDIO = 17;
  42         const PT_VIDEO = 18;
  43         const PT_DOCUMENT = 19;
  44         const PT_EVENT = 32;
  45         const PT_PERSONAL_NOTE = 128;
  46
  47         // Field list that is used to display the items
  48         const DISPLAY_FIELDLIST = [
  49                 'uid', 'id', 'parent', 'uri', 'thr-parent', 'parent-uri', 'guid', 'network', 'gravity',
  50                 'commented', 'created', 'edited', 'received', 'verb', 'object-type', 'postopts', 'plink',
  51                 'wall', 'private', 'starred', 'origin', 'title', 'body', 'file', 'attach', 'language',
  52                 'content-warning', 'location', 'coord', 'app', 'rendered-hash', 'rendered-html', 'object',
  53                 'allow_cid', 'allow_gid', 'deny_cid', 'deny_gid', 'item_id',
  54                 'author-id', 'author-link', 'author-name', 'author-avatar', 'author-network',
  55                 'owner-id', 'owner-link', 'owner-name', 'owner-avatar', 'owner-network',
  56                 'contact-id', 'contact-uid', 'contact-link', 'contact-name', 'contact-avatar',
  57                 'writable', 'self', 'cid', 'alias', 'pinned',
  58                 'event-id', 'event-created', 'event-edited', 'event-start', 'event-finish',
  59                 'event-summary', 'event-desc', 'event-location', 'event-type',
  60                 'event-nofinish', 'event-adjust', 'event-ignore', 'event-id',
  61                 'delivery_queue_count', 'delivery_queue_done', 'delivery_queue_failed'
  62         ];
  63
  64         // Field list that is used to deliver items via the protocols
  65         const DELIVER_FIELDLIST = ['uid', 'id', 'parent', 'uri', 'thr-parent', 'parent-uri', 'guid',
  66                         'parent-guid', 'created', 'edited', 'verb', 'object-type', 'object', 'target',
  67                         'private', 'title', 'body', 'location', 'coord', 'app',
  68                         'attach', 'tag', 'deleted', 'extid', 'post-type',
  69                         'allow_cid', 'allow_gid', 'deny_cid', 'deny_gid',
  70                         'author-id', 'author-link', 'owner-link', 'contact-uid',
  71                         'signed_text', 'signature', 'signer', 'network'];
  72
  73         // Field list for "item-content" table that is mixed with the item table
  74         const MIXED_CONTENT_FIELDLIST = ['title', 'content-warning', 'body', 'location',
  75                         'coord', 'app', 'rendered-hash', 'rendered-html', 'verb',
  76                         'object-type', 'object', 'target-type', 'target', 'plink'];
  77
  78         // Field list for "item-content" table that is not present in the "item" table
  79         const CONTENT_FIELDLIST = ['language'];
  80
  81         // All fields in the item table
  82         const ITEM_FIELDLIST = ['id', 'uid', 'parent', 'uri', 'parent-uri', 'thr-parent', 'guid',
  83                         'contact-id', 'type', 'wall', 'gravity', 'extid', 'icid', 'iaid', 'psid',
  84                         'created', 'edited', 'commented', 'received', 'changed', 'verb',
  85                         'postopts', 'plink', 'resource-id', 'event-id', 'tag', 'attach', 'inform',
  86                         'file', 'allow_cid', 'allow_gid', 'deny_cid', 'deny_gid', 'post-type',
  87                         'private', 'pubmail', 'moderated', 'visible', 'starred', 'bookmark',
  88                         'unseen', 'deleted', 'origin', 'forum_mode', 'mention', 'global', 'network',
  89                         'title', 'content-warning', 'body', 'location', 'coord', 'app',
  90                         'rendered-hash', 'rendered-html', 'object-type', 'object', 'target-type', 'target',
  91                         'author-id', 'author-link', 'author-name', 'author-avatar', 'author-network',
  92                         'owner-id', 'owner-link', 'owner-name', 'owner-avatar'];
  93
  94         // Never reorder or remove entries from this list. Just add new ones at the end, if needed.
  95         // The item-activity table only stores the index and needs this array to know the matching activity.
  96         const ACTIVITIES = [
  97                 Activity::LIKE, Activity::DISLIKE,
  98                 Activity::ATTEND, Activity::ATTENDNO, Activity::ATTENDMAYBE,
  99                 Activity::FOLLOW,
 100                 Activity::ANNOUNCE];
 101
 102         private static $legacy_mode = null;
 103
 104         public static function isLegacyMode()
 105         {
 106                 if (is_null(self::$legacy_mode)) {
 107                         self::$legacy_mode = (Config::get("system", "post_update_version") < 1279);
 108                 }
 109
 110                 return self::$legacy_mode;
 111         }
 112
 113         /**
 114          * Set the pinned state of an item
 115          *
 116          * @param integer $iid    Item ID
 117          * @param integer $uid    User ID
 118          * @param boolean $pinned Pinned state
 119          */
 120         public static function setPinned(int $iid, int $uid, bool $pinned)
 121         {
 122                 DBA::update('user-item', ['pinned' => $pinned], ['iid' => $iid, 'uid' => $uid], true);
 123         }
 124
 125         /**
 126          * Get the pinned state
 127          *
 128          * @param integer $iid Item ID
 129          * @param integer $uid User ID
 130          *
 131          * @return boolean pinned state
 132          */
 133         public static function getPinned(int $iid, int $uid)
 134         {
 135                 $useritem = DBA::selectFirst('user-item', ['pinned'], ['iid' => $iid, 'uid' => $uid]);
 136                 if (!DBA::isResult($useritem)) {
 137                         return false;
 138                 }
 139                 return (bool)$useritem['pinned'];
 140         }
 141
 142         /**
 143          * Select pinned rows from the item table for a given user
 144          *
 145          * @param integer $uid       User ID
 146          * @param array   $selected  Array of selected fields, empty for all
 147          * @param array   $condition Array of fields for condition
 148          * @param array   $params    Array of several parameters
 149          *
 150          * @return boolean|object
 151          * @throws \Exception
 152          */
 153         public static function selectPinned(int $uid, array $selected = [], array $condition = [], $params = [])
 154         {
 155                 $useritems = DBA::select('user-item', ['iid'], ['uid' => $uid, 'pinned' => true]);
 156                 if (!DBA::isResult($useritems)) {
 157                         return $useritems;
 158                 }
 159
 160                 $pinned = [];
 161                 while ($useritem = self::fetch($useritems)) {
 162                         $pinned[] = $useritem['iid'];
 163                 }
 164                 DBA::close($useritems);
 165
 166                 if (empty($pinned)) {
 167                         return [];
 168                 }
 169
 170                 if (empty($condition) || !is_array($condition)) {
 171                         $condition = ['iid' => $pinned];
 172                 } else {
 173                         reset($condition);
 174                         $first_key = key($condition);
 175                         if (!is_int($first_key)) {
 176                                 $condition['iid'] = $pinned;
 177                         } else {
 178                                 $values_string = substr(str_repeat("?, ", count($pinned)), 0, -2);
 179                                 $condition[0] = '(' . $condition[0] . ") AND `iid` IN (" . $values_string . ")";
 180                                 $condition = array_merge($condition, $pinned);
 181                         }
 182                 }
 183
 184                 return self::selectThreadForUser($uid, $selected, $condition, $params);
 185         }
 186
 187         /**
 188          * returns an activity index from an activity string
 189          *
 190          * @param string $activity activity string
 191          * @return integer Activity index
 192          */
 193         public static function activityToIndex($activity)
 194         {
 195                 $index = array_search($activity, self::ACTIVITIES);
 196
 197                 if (is_bool($index)) {
 198                         $index = -1;
 199                 }
 200
 201                 return $index;
 202         }
 203
 204         /**
 205          * returns an activity string from an activity index
 206          *
 207          * @param integer $index activity index
 208          * @return string Activity string
 209          */
 210         private static function indexToActivity($index)
 211         {
 212                 if (is_null($index) || !array_key_exists($index, self::ACTIVITIES)) {
 213                         return '';
 214                 }
 215
 216                 return self::ACTIVITIES[$index];
 217         }
 218
 219         /**
 220          * Fetch a single item row
 221          *
 222          * @param mixed $stmt statement object
 223          * @return array current row
 224          */
 225         public static function fetch($stmt)
 226         {
 227                 $row = DBA::fetch($stmt);
 228
 229                 if (is_bool($row)) {
 230                         return $row;
 231                 }
 232
 233                 // ---------------------- Transform item structure data ----------------------
 234
 235                 // We prefer the data from the user's contact over the public one
 236                 if (!empty($row['author-link']) && !empty($row['contact-link']) &&
 237                         ($row['author-link'] == $row['contact-link'])) {
 238                         if (isset($row['author-avatar']) && !empty($row['contact-avatar'])) {
 239                                 $row['author-avatar'] = $row['contact-avatar'];
 240                         }
 241                         if (isset($row['author-name']) && !empty($row['contact-name'])) {
 242                                 $row['author-name'] = $row['contact-name'];
 243                         }
 244                 }
 245
 246                 if (!empty($row['owner-link']) && !empty($row['contact-link']) &&
 247                         ($row['owner-link'] == $row['contact-link'])) {
 248                         if (isset($row['owner-avatar']) && !empty($row['contact-avatar'])) {
 249                                 $row['owner-avatar'] = $row['contact-avatar'];
 250                         }
 251                         if (isset($row['owner-name']) && !empty($row['contact-name'])) {
 252                                 $row['owner-name'] = $row['contact-name'];
 253                         }
 254                 }
 255
 256                 // We can always comment on posts from these networks
 257                 if (array_key_exists('writable', $row) &&
 258                         in_array($row['internal-network'], Protocol::FEDERATED)) {
 259                         $row['writable'] = true;
 260                 }
 261
 262                 // ---------------------- Transform item content data ----------------------
 263
 264                 // Fetch data from the item-content table whenever there is content there
 265                 if (self::isLegacyMode()) {
 266                         $legacy_fields = array_merge(ItemDeliveryData::LEGACY_FIELD_LIST, self::MIXED_CONTENT_FIELDLIST);
 267                         foreach ($legacy_fields as $field) {
 268                                 if (empty($row[$field]) && !empty($row['internal-item-' . $field])) {
 269                                         $row[$field] = $row['internal-item-' . $field];
 270                                 }
 271                                 unset($row['internal-item-' . $field]);
 272                         }
 273                 }
 274
 275                 if (!empty($row['internal-iaid']) && array_key_exists('verb', $row)) {
 276                         $row['verb'] = self::indexToActivity($row['internal-activity']);
 277                         if (array_key_exists('title', $row)) {
 278                                 $row['title'] = '';
 279                         }
 280                         if (array_key_exists('body', $row)) {
 281                                 $row['body'] = $row['verb'];
 282                         }
 283                         if (array_key_exists('object', $row)) {
 284                                 $row['object'] = '';
 285                         }
 286                         if (array_key_exists('object-type', $row)) {
 287                                 $row['object-type'] = Activity\ObjectType::NOTE;
 288                         }
 289                 } elseif (array_key_exists('verb', $row) && in_array($row['verb'], ['', Activity::POST, Activity::SHARE])) {
 290                         // Posts don't have a target - but having tags or files.
 291                         // We safe some performance by building tag and file strings only here.
 292                         // We remove the target since they aren't used for this type.
 293                         // In mail posts we do store some mail header data in the object.
 294                         if (array_key_exists('target', $row)) {
 295                                 $row['target'] = '';
 296                         }
 297                 }
 298
 299                 if (!array_key_exists('verb', $row) || in_array($row['verb'], ['', Activity::POST, Activity::SHARE])) {
 300                         // Build the tag string out of the term entries
 301                         if (array_key_exists('tag', $row) && empty($row['tag'])) {
 302                                 $row['tag'] = Term::tagTextFromItemId($row['internal-iid']);
 303                         }
 304
 305                         // Build the file string out of the term entries
 306                         if (array_key_exists('file', $row) && empty($row['file'])) {
 307                                 $row['file'] = Term::fileTextFromItemId($row['internal-iid']);
 308                         }
 309                 }
 310
 311                 if (array_key_exists('signed_text', $row) && array_key_exists('interaction', $row) && !is_null($row['interaction'])) {
 312                         $row['signed_text'] = $row['interaction'];
 313                 }
 314
 315                 if (array_key_exists('ignored', $row) && array_key_exists('internal-user-ignored', $row) && !is_null($row['internal-user-ignored'])) {
 316                         $row['ignored'] = $row['internal-user-ignored'];
 317                 }
 318
 319                 // Remove internal fields
 320                 unset($row['internal-activity']);
 321                 unset($row['internal-network']);
 322                 unset($row['internal-iid']);
 323                 unset($row['internal-iaid']);
 324                 unset($row['internal-icid']);
 325                 unset($row['internal-user-ignored']);
 326                 unset($row['interaction']);
 327
 328                 return $row;
 329         }
 330
 331         /**
 332          * Fills an array with data from an item query
 333          *
 334          * @param object $stmt statement object
 335          * @param bool   $do_close
 336          * @return array Data array
 337          */
 338         public static function inArray($stmt, $do_close = true) {
 339                 if (is_bool($stmt)) {
 340                         return $stmt;
 341                 }
 342
 343                 $data = [];
 344                 while ($row = self::fetch($stmt)) {
 345                         $data[] = $row;
 346                 }
 347                 if ($do_close) {
 348                         DBA::close($stmt);
 349                 }
 350                 return $data;
 351         }
 352
 353         /**
 354          * Check if item data exists
 355          *
 356          * @param array $condition array of fields for condition
 357          *
 358          * @return boolean Are there rows for that condition?
 359          * @throws \Exception
 360          */
 361         public static function exists($condition) {
 362                 $stmt = self::select(['id'], $condition, ['limit' => 1]);
 363
 364                 if (is_bool($stmt)) {
 365                         $retval = $stmt;
 366                 } else {
 367                         $retval = (DBA::numRows($stmt) > 0);
 368                 }
 369
 370                 DBA::close($stmt);
 371
 372                 return $retval;
 373         }
 374
 375         /**
 376          * Retrieve a single record from the item table for a given user and returns it in an associative array
 377          *
 378          * @param integer $uid User ID
 379          * @param array   $selected
 380          * @param array   $condition
 381          * @param array   $params
 382          * @return bool|array
 383          * @throws \Exception
 384          * @see   DBA::select
 385          */
 386         public static function selectFirstForUser($uid, array $selected = [], array $condition = [], $params = [])
 387         {
 388                 $params['uid'] = $uid;
 389
 390                 if (empty($selected)) {
 391                         $selected = Item::DISPLAY_FIELDLIST;
 392                 }
 393
 394                 return self::selectFirst($selected, $condition, $params);
 395         }
 396
 397         /**
 398          * Select rows from the item table for a given user
 399          *
 400          * @param integer $uid       User ID
 401          * @param array   $selected  Array of selected fields, empty for all
 402          * @param array   $condition Array of fields for condition
 403          * @param array   $params    Array of several parameters
 404          *
 405          * @return boolean|object
 406          * @throws \Exception
 407          */
 408         public static function selectForUser($uid, array $selected = [], array $condition = [], $params = [])
 409         {
 410                 $params['uid'] = $uid;
 411
 412                 if (empty($selected)) {
 413                         $selected = Item::DISPLAY_FIELDLIST;
 414                 }
 415
 416                 return self::select($selected, $condition, $params);
 417         }
 418
 419         /**
 420          * Retrieve a single record from the item table and returns it in an associative array
 421          *
 422          * @param array $fields
 423          * @param array $condition
 424          * @param array $params
 425          * @return bool|array
 426          * @throws \Exception
 427          * @see   DBA::select
 428          */
 429         public static function selectFirst(array $fields = [], array $condition = [], $params = [])
 430         {
 431                 $params['limit'] = 1;
 432
 433                 $result = self::select($fields, $condition, $params);
 434
 435                 if (is_bool($result)) {
 436                         return $result;
 437                 } else {
 438                         $row = self::fetch($result);
 439                         DBA::close($result);
 440                         return $row;
 441                 }
 442         }
 443
 444         /**
 445          * Select rows from the item table and returns them as an array
 446          *
 447          * @param array $selected  Array of selected fields, empty for all
 448          * @param array $condition Array of fields for condition
 449          * @param array $params    Array of several parameters
 450          *
 451          * @return array
 452          * @throws \Exception
 453          */
 454         public static function selectToArray(array $fields = [], array $condition = [], $params = [])
 455         {
 456                 $result = self::select($fields, $condition, $params);
 457
 458                 if (is_bool($result)) {
 459                         return [];
 460                 }
 461
 462                 $data = [];
 463                 while ($row = self::fetch($result)) {
 464                         $data[] = $row;
 465                 }
 466                 DBA::close($result);
 467
 468                 return $data;
 469         }
 470
 471         /**
 472          * Select rows from the item table
 473          *
 474          * @param array $selected  Array of selected fields, empty for all
 475          * @param array $condition Array of fields for condition
 476          * @param array $params    Array of several parameters
 477          *
 478          * @return boolean|object
 479          * @throws \Exception
 480          */
 481         public static function select(array $selected = [], array $condition = [], $params = [])
 482         {
 483                 $uid = 0;
 484                 $usermode = false;
 485
 486                 if (isset($params['uid'])) {
 487                         $uid = $params['uid'];
 488                         $usermode = true;
 489                 }
 490
 491                 $fields = self::fieldlist($usermode);
 492
 493                 $select_fields = self::constructSelectFields($fields, $selected);
 494
 495                 $condition_string = DBA::buildCondition($condition);
 496
 497                 $condition_string = self::addTablesToFields($condition_string, $fields);
 498
 499                 if ($usermode) {
 500                         $condition_string = $condition_string . ' AND ' . self::condition(false);
 501                 }
 502
 503                 $param_string = self::addTablesToFields(DBA::buildParameter($params), $fields);
 504
 505                 $table = "`item` " . self::constructJoins($uid, $select_fields . $condition_string . $param_string, false, $usermode);
 506
 507                 $sql = "SELECT " . $select_fields . " FROM " . $table . $condition_string . $param_string;
 508
 509                 return DBA::p($sql, $condition);
 510         }
 511
 512         /**
 513          * Select rows from the starting post in the item table
 514          *
 515          * @param integer $uid       User ID
 516          * @param array   $selected
 517          * @param array   $condition Array of fields for condition
 518          * @param array   $params    Array of several parameters
 519          *
 520          * @return boolean|object
 521          * @throws \Exception
 522          */
 523         public static function selectThreadForUser($uid, array $selected = [], array $condition = [], $params = [])
 524         {
 525                 $params['uid'] = $uid;
 526
 527                 if (empty($selected)) {
 528                         $selected = Item::DISPLAY_FIELDLIST;
 529                 }
 530
 531                 return self::selectThread($selected, $condition, $params);
 532         }
 533
 534         /**
 535          * Retrieve a single record from the starting post in the item table and returns it in an associative array
 536          *
 537          * @param integer $uid User ID
 538          * @param array   $selected
 539          * @param array   $condition
 540          * @param array   $params
 541          * @return bool|array
 542          * @throws \Exception
 543          * @see   DBA::select
 544          */
 545         public static function selectFirstThreadForUser($uid, array $selected = [], array $condition = [], $params = [])
 546         {
 547                 $params['uid'] = $uid;
 548
 549                 if (empty($selected)) {
 550                         $selected = Item::DISPLAY_FIELDLIST;
 551                 }
 552
 553                 return self::selectFirstThread($selected, $condition, $params);
 554         }
 555
 556         /**
 557          * Retrieve a single record from the starting post in the item table and returns it in an associative array
 558          *
 559          * @param array $fields
 560          * @param array $condition
 561          * @param array $params
 562          * @return bool|array
 563          * @throws \Exception
 564          * @see   DBA::select
 565          */
 566         public static function selectFirstThread(array $fields = [], array $condition = [], $params = [])
 567         {
 568                 $params['limit'] = 1;
 569                 $result = self::selectThread($fields, $condition, $params);
 570
 571                 if (is_bool($result)) {
 572                         return $result;
 573                 } else {
 574                         $row = self::fetch($result);
 575                         DBA::close($result);
 576                         return $row;
 577                 }
 578         }
 579
 580         /**
 581          * Select rows from the starting post in the item table
 582          *
 583          * @param array $selected  Array of selected fields, empty for all
 584          * @param array $condition Array of fields for condition
 585          * @param array $params    Array of several parameters
 586          *
 587          * @return boolean|object
 588          * @throws \Exception
 589          */
 590         public static function selectThread(array $selected = [], array $condition = [], $params = [])
 591         {
 592                 $uid = 0;
 593                 $usermode = false;
 594
 595                 if (isset($params['uid'])) {
 596                         $uid = $params['uid'];
 597                         $usermode = true;
 598                 }
 599
 600                 $fields = self::fieldlist($usermode);
 601
 602                 $fields['thread'] = ['mention', 'ignored', 'iid'];
 603
 604                 $threadfields = ['thread' => ['iid', 'uid', 'contact-id', 'owner-id', 'author-id',
 605                         'created', 'edited', 'commented', 'received', 'changed', 'wall', 'private',
 606                         'pubmail', 'moderated', 'visible', 'starred', 'ignored', 'post-type',
 607                         'unseen', 'deleted', 'origin', 'forum_mode', 'mention', 'network']];
 608
 609                 $select_fields = self::constructSelectFields($fields, $selected);
 610
 611                 $condition_string = DBA::buildCondition($condition);
 612
 613                 $condition_string = self::addTablesToFields($condition_string, $threadfields);
 614                 $condition_string = self::addTablesToFields($condition_string, $fields);
 615
 616                 if ($usermode) {
 617                         $condition_string = $condition_string . ' AND ' . self::condition(true);
 618                 }
 619
 620                 $param_string = DBA::buildParameter($params);
 621                 $param_string = self::addTablesToFields($param_string, $threadfields);
 622                 $param_string = self::addTablesToFields($param_string, $fields);
 623
 624                 $table = "`thread` " . self::constructJoins($uid, $select_fields . $condition_string . $param_string, true, $usermode);
 625
 626                 $sql = "SELECT " . $select_fields . " FROM " . $table . $condition_string . $param_string;
 627
 628                 return DBA::p($sql, $condition);
 629         }
 630
 631         /**
 632          * Returns a list of fields that are associated with the item table
 633          *
 634          * @param $usermode
 635          * @return array field list
 636          */
 637         private static function fieldlist($usermode)
 638         {
 639                 $fields = [];
 640
 641                 $fields['item'] = ['id', 'uid', 'parent', 'uri', 'parent-uri', 'thr-parent', 'guid',
 642                         'contact-id', 'owner-id', 'author-id', 'type', 'wall', 'gravity', 'extid',
 643                         'created', 'edited', 'commented', 'received', 'changed', 'psid',
 644                         'resource-id', 'event-id', 'tag', 'attach', 'post-type', 'file',
 645                         'private', 'pubmail', 'moderated', 'visible', 'starred', 'bookmark',
 646                         'unseen', 'deleted', 'origin', 'forum_mode', 'mention', 'global',
 647                         'id' => 'item_id', 'network', 'icid', 'iaid', 'id' => 'internal-iid',
 648                         'network' => 'internal-network', 'icid' => 'internal-icid',
 649                         'iaid' => 'internal-iaid'];
 650
 651                 if ($usermode) {
 652                         $fields['user-item'] = ['pinned', 'notification-type', 'ignored' => 'internal-user-ignored'];
 653                 }
 654
 655                 $fields['item-activity'] = ['activity', 'activity' => 'internal-activity'];
 656
 657                 $fields['item-content'] = array_merge(self::CONTENT_FIELDLIST, self::MIXED_CONTENT_FIELDLIST);
 658
 659                 $fields['item-delivery-data'] = array_merge(ItemDeliveryData::LEGACY_FIELD_LIST, ItemDeliveryData::FIELD_LIST);
 660
 661                 $fields['permissionset'] = ['allow_cid', 'allow_gid', 'deny_cid', 'deny_gid'];
 662
 663                 $fields['author'] = ['url' => 'author-link', 'name' => 'author-name', 'addr' => 'author-addr',
 664                         'thumb' => 'author-avatar', 'nick' => 'author-nick', 'network' => 'author-network'];
 665
 666                 $fields['owner'] = ['url' => 'owner-link', 'name' => 'owner-name', 'addr' => 'owner-addr',
 667                         'thumb' => 'owner-avatar', 'nick' => 'owner-nick', 'network' => 'owner-network'];
 668
 669                 $fields['contact'] = ['url' => 'contact-link', 'name' => 'contact-name', 'thumb' => 'contact-avatar',
 670                         'writable', 'self', 'id' => 'cid', 'alias', 'uid' => 'contact-uid',
 671                         'photo', 'name-date', 'uri-date', 'avatar-date', 'thumb', 'dfrn-id'];
 672
 673                 $fields['parent-item'] = ['guid' => 'parent-guid', 'network' => 'parent-network'];
 674
 675                 $fields['parent-item-author'] = ['url' => 'parent-author-link', 'name' => 'parent-author-name'];
 676
 677                 $fields['event'] = ['created' => 'event-created', 'edited' => 'event-edited',
 678                         'start' => 'event-start','finish' => 'event-finish',
 679                         'summary' => 'event-summary','desc' => 'event-desc',
 680                         'location' => 'event-location', 'type' => 'event-type',
 681                         'nofinish' => 'event-nofinish','adjust' => 'event-adjust',
 682                         'ignore' => 'event-ignore', 'id' => 'event-id'];
 683
 684                 $fields['sign'] = ['signed_text', 'signature', 'signer'];
 685
 686                 $fields['diaspora-interaction'] = ['interaction'];
 687
 688                 return $fields;
 689         }
 690
 691         /**
 692          * Returns SQL condition for the "select" functions
 693          *
 694          * @param boolean $thread_mode Called for the items (false) or for the threads (true)
 695          *
 696          * @return string SQL condition
 697          */
 698         private static function condition($thread_mode)
 699         {
 700                 if ($thread_mode) {
 701                         $master_table = "`thread`";
 702                 } else {
 703                         $master_table = "`item`";
 704                 }
 705                 return sprintf("$master_table.`visible` AND NOT $master_table.`deleted` AND NOT $master_table.`moderated`
 706                         AND (`user-item`.`hidden` IS NULL OR NOT `user-item`.`hidden`)
 707                         AND (`user-author`.`blocked` IS NULL OR NOT `user-author`.`blocked`)
 708                         AND (`user-author`.`ignored` IS NULL OR NOT `user-author`.`ignored` OR `item`.`gravity` != %d)
 709                         AND (`user-owner`.`blocked` IS NULL OR NOT `user-owner`.`blocked`)
 710                         AND (`user-owner`.`ignored` IS NULL OR NOT `user-owner`.`ignored` OR `item`.`gravity` != %d) ",
 711                         GRAVITY_PARENT, GRAVITY_PARENT);
 712         }
 713
 714         /**
 715          * Returns all needed "JOIN" commands for the "select" functions
 716          *
 717          * @param integer $uid          User ID
 718          * @param string  $sql_commands The parts of the built SQL commands in the "select" functions
 719          * @param boolean $thread_mode  Called for the items (false) or for the threads (true)
 720          *
 721          * @param         $user_mode
 722          * @return string The SQL joins for the "select" functions
 723          */
 724         private static function constructJoins($uid, $sql_commands, $thread_mode, $user_mode)
 725         {
 726                 if ($thread_mode) {
 727                         $master_table = "`thread`";
 728                         $master_table_key = "`thread`.`iid`";
 729                         $joins = "STRAIGHT_JOIN `item` ON `item`.`id` = `thread`.`iid` ";
 730                 } else {
 731                         $master_table = "`item`";
 732                         $master_table_key = "`item`.`id`";
 733                         $joins = '';
 734                 }
 735
 736                 if ($user_mode) {
 737                         $joins .= sprintf("STRAIGHT_JOIN `contact` ON `contact`.`id` = $master_table.`contact-id`
 738                                 AND NOT `contact`.`blocked`
 739                                 AND ((NOT `contact`.`readonly` AND NOT `contact`.`pending` AND (`contact`.`rel` IN (%s, %s)))
 740                                 OR `contact`.`self` OR `item`.`gravity` != %d OR `contact`.`uid` = 0)
 741                                 STRAIGHT_JOIN `contact` AS `author` ON `author`.`id` = $master_table.`author-id` AND NOT `author`.`blocked`
 742                                 STRAIGHT_JOIN `contact` AS `owner` ON `owner`.`id` = $master_table.`owner-id` AND NOT `owner`.`blocked`
 743                                 LEFT JOIN `user-item` ON `user-item`.`iid` = $master_table_key AND `user-item`.`uid` = %d
 744                                 LEFT JOIN `user-contact` AS `user-author` ON `user-author`.`cid` = $master_table.`author-id` AND `user-author`.`uid` = %d
 745                                 LEFT JOIN `user-contact` AS `user-owner` ON `user-owner`.`cid` = $master_table.`owner-id` AND `user-owner`.`uid` = %d",
 746                                 Contact::SHARING, Contact::FRIEND, GRAVITY_PARENT, intval($uid), intval($uid), intval($uid));
 747                 } else {
 748                         if (strpos($sql_commands, "`contact`.") !== false) {
 749                                 $joins .= "LEFT JOIN `contact` ON `contact`.`id` = $master_table.`contact-id`";
 750                         }
 751                         if (strpos($sql_commands, "`author`.") !== false) {
 752                                 $joins .= " LEFT JOIN `contact` AS `author` ON `author`.`id` = $master_table.`author-id`";
 753                         }
 754                         if (strpos($sql_commands, "`owner`.") !== false) {
 755                                 $joins .= " LEFT JOIN `contact` AS `owner` ON `owner`.`id` = $master_table.`owner-id`";
 756                         }
 757                 }
 758
 759                 if (strpos($sql_commands, "`group_member`.") !== false) {
 760                         $joins .= " STRAIGHT_JOIN `group_member` ON `group_member`.`contact-id` = $master_table.`contact-id`";
 761                 }
 762
 763                 if (strpos($sql_commands, "`user`.") !== false) {
 764                         $joins .= " STRAIGHT_JOIN `user` ON `user`.`uid` = $master_table.`uid`";
 765                 }
 766
 767                 if (strpos($sql_commands, "`event`.") !== false) {
 768                         $joins .= " LEFT JOIN `event` ON `event-id` = `event`.`id`";
 769                 }
 770
 771                 if (strpos($sql_commands, "`sign`.") !== false) {
 772                         $joins .= " LEFT JOIN `sign` ON `sign`.`iid` = `item`.`id`";
 773                 }
 774
 775                 if (strpos($sql_commands, "`diaspora-interaction`.") !== false) {
 776                         $joins .= " LEFT JOIN `diaspora-interaction` ON `diaspora-interaction`.`uri-id` = `item`.`uri-id`";
 777                 }
 778
 779                 if (strpos($sql_commands, "`item-activity`.") !== false) {
 780                         $joins .= " LEFT JOIN `item-activity` ON `item-activity`.`uri-id` = `item`.`uri-id`";
 781                 }
 782
 783                 if (strpos($sql_commands, "`item-content`.") !== false) {
 784                         $joins .= " LEFT JOIN `item-content` ON `item-content`.`uri-id` = `item`.`uri-id`";
 785                 }
 786
 787                 if (strpos($sql_commands, "`item-delivery-data`.") !== false) {
 788                         $joins .= " LEFT JOIN `item-delivery-data` ON `item-delivery-data`.`iid` = `item`.`id`";
 789                 }
 790
 791                 if (strpos($sql_commands, "`permissionset`.") !== false) {
 792                         $joins .= " LEFT JOIN `permissionset` ON `permissionset`.`id` = `item`.`psid`";
 793                 }
 794
 795                 if ((strpos($sql_commands, "`parent-item`.") !== false) || (strpos($sql_commands, "`parent-author`.") !== false)) {
 796                         $joins .= " STRAIGHT_JOIN `item` AS `parent-item` ON `parent-item`.`id` = `item`.`parent`";
 797                 }
 798
 799                 if (strpos($sql_commands, "`parent-item-author`.") !== false) {
 800                         $joins .= " STRAIGHT_JOIN `contact` AS `parent-item-author` ON `parent-item-author`.`id` = `parent-item`.`author-id`";
 801                 }
 802
 803                 return $joins;
 804         }
 805
 806         /**
 807          * Add the field list for the "select" functions
 808          *
 809          * @param array $fields The field definition array
 810          * @param array $selected The array with the selected fields from the "select" functions
 811          *
 812          * @return string The field list
 813          */
 814         private static function constructSelectFields($fields, $selected)
 815         {
 816                 if (!empty($selected)) {
 817                         $selected[] = 'internal-iid';
 818                         $selected[] = 'internal-iaid';
 819                         $selected[] = 'internal-icid';
 820                         $selected[] = 'internal-network';
 821                 }
 822
 823                 if (in_array('verb', $selected)) {
 824                         $selected[] = 'internal-activity';
 825                 }
 826
 827                 if (in_array('ignored', $selected)) {
 828                         $selected[] = 'internal-user-ignored';
 829                 }
 830
 831                 if (in_array('signed_text', $selected)) {
 832                         $selected[] = 'interaction';
 833                 }
 834
 835                 $legacy_fields = array_merge(ItemDeliveryData::LEGACY_FIELD_LIST, self::MIXED_CONTENT_FIELDLIST);
 836
 837                 $selection = [];
 838                 foreach ($fields as $table => $table_fields) {
 839                         foreach ($table_fields as $field => $select) {
 840                                 if (empty($selected) || in_array($select, $selected)) {
 841                                         if (self::isLegacyMode() && in_array($select, $legacy_fields)) {
 842                                                 $selection[] = "`item`.`".$select."` AS `internal-item-" . $select . "`";
 843                                         }
 844                                         if (is_int($field)) {
 845                                                 $selection[] = "`" . $table . "`.`" . $select . "`";
 846                                         } else {
 847                                                 $selection[] = "`" . $table . "`.`" . $field . "` AS `" . $select . "`";
 848                                         }
 849                                 }
 850                         }
 851                 }
 852                 return implode(", ", $selection);
 853         }
 854
 855         /**
 856          * add table definition to fields in an SQL query
 857          *
 858          * @param string $query SQL query
 859          * @param array $fields The field definition array
 860          *
 861          * @return string the changed SQL query
 862          */
 863         private static function addTablesToFields($query, $fields)
 864         {
 865                 foreach ($fields as $table => $table_fields) {
 866                         foreach ($table_fields as $alias => $field) {
 867                                 if (is_int($alias)) {
 868                                         $replace_field = $field;
 869                                 } else {
 870                                         $replace_field = $alias;
 871                                 }
 872
 873                                 $search = "/([^\.])`" . $field . "`/i";
 874                                 $replace = "$1`" . $table . "`.`" . $replace_field . "`";
 875                                 $query = preg_replace($search, $replace, $query);
 876                         }
 877                 }
 878                 return $query;
 879         }
 880
 881         /**
 882          * Update existing item entries
 883          *
 884          * @param array $fields    The fields that are to be changed
 885          * @param array $condition The condition for finding the item entries
 886          *
 887          * In the future we may have to change permissions as well.
 888          * Then we had to add the user id as third parameter.
 889          *
 890          * A return value of "0" doesn't mean an error - but that 0 rows had been changed.
 891          *
 892          * @return integer|boolean number of affected rows - or "false" if there was an error
 893          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 894          */
 895         public static function update(array $fields, array $condition)
 896         {
 897                 if (empty($condition) || empty($fields)) {
 898                         return false;
 899                 }
 900
 901                 // To ensure the data integrity we do it in an transaction
 902                 DBA::transaction();
 903
 904                 // We cannot simply expand the condition to check for origin entries
 905                 // The condition needn't to be a simple array but could be a complex condition.
 906                 // And we have to execute this query before the update to ensure to fetch the same data.
 907                 $items = DBA::select('item', ['id', 'origin', 'uri', 'uri-id', 'iaid', 'icid', 'tag', 'file'], $condition);
 908
 909                 $content_fields = [];
 910                 foreach (array_merge(self::CONTENT_FIELDLIST, self::MIXED_CONTENT_FIELDLIST) as $field) {
 911                         if (isset($fields[$field])) {
 912                                 $content_fields[$field] = $fields[$field];
 913                                 if (in_array($field, self::CONTENT_FIELDLIST) || !self::isLegacyMode()) {
 914                                         unset($fields[$field]);
 915                                 } else {
 916                                         $fields[$field] = null;
 917                                 }
 918                         }
 919                 }
 920
 921                 $delivery_data = ItemDeliveryData::extractFields($fields);
 922
 923                 $clear_fields = ['bookmark', 'type', 'author-name', 'author-avatar', 'author-link', 'owner-name', 'owner-avatar', 'owner-link', 'postopts', 'inform'];
 924                 foreach ($clear_fields as $field) {
 925                         if (array_key_exists($field, $fields)) {
 926                                 $fields[$field] = null;
 927                         }
 928                 }
 929
 930                 if (array_key_exists('tag', $fields)) {
 931                         $tags = $fields['tag'];
 932                         $fields['tag'] = null;
 933                 } else {
 934                         $tags = null;
 935                 }
 936
 937                 if (array_key_exists('file', $fields)) {
 938                         $files = $fields['file'];
 939                         $fields['file'] = null;
 940                 } else {
 941                         $files = null;
 942                 }
 943
 944                 if (!empty($fields)) {
 945                         $success = DBA::update('item', $fields, $condition);
 946
 947                         if (!$success) {
 948                                 DBA::close($items);
 949                                 DBA::rollback();
 950                                 return false;
 951                         }
 952                 }
 953
 954                 // When there is no content for the "old" item table, this will count the fetched items
 955                 $rows = DBA::affectedRows();
 956
 957                 $notify_items = [];
 958
 959                 while ($item = DBA::fetch($items)) {
 960                         if (!empty($item['iaid']) || (!empty($content_fields['verb']) && (self::activityToIndex($content_fields['verb']) >= 0))) {
 961                                 self::updateActivity($content_fields, ['uri-id' => $item['uri-id']]);
 962
 963                                 if (empty($item['iaid'])) {
 964                                         $item_activity = DBA::selectFirst('item-activity', ['id'], ['uri-id' => $item['uri-id']]);
 965                                         if (DBA::isResult($item_activity)) {
 966                                                 $item_fields = ['iaid' => $item_activity['id'], 'icid' => null];
 967                                                 foreach (self::MIXED_CONTENT_FIELDLIST as $field) {
 968                                                         if (self::isLegacyMode()) {
 969                                                                 $item_fields[$field] = null;
 970                                                         } else {
 971                                                                 unset($item_fields[$field]);
 972                                                         }
 973                                                 }
 974                                                 DBA::update('item', $item_fields, ['id' => $item['id']]);
 975
 976                                                 if (!empty($item['icid']) && !DBA::exists('item', ['icid' => $item['icid']])) {
 977                                                         DBA::delete('item-content', ['id' => $item['icid']]);
 978                                                 }
 979                                         }
 980                                 } elseif (!empty($item['icid'])) {
 981                                         DBA::update('item', ['icid' => null], ['id' => $item['id']]);
 982
 983                                         if (!DBA::exists('item', ['icid' => $item['icid']])) {
 984                                                 DBA::delete('item-content', ['id' => $item['icid']]);
 985                                         }
 986                                 }
 987                         } else {
 988                                 self::updateContent($content_fields, ['uri-id' => $item['uri-id']]);
 989
 990                                 if (empty($item['icid'])) {
 991                                         $item_content = DBA::selectFirst('item-content', [], ['uri-id' => $item['uri-id']]);
 992                                         if (DBA::isResult($item_content)) {
 993                                                 $item_fields = ['icid' => $item_content['id']];
 994                                                 // Clear all fields in the item table that have a content in the item-content table
 995                                                 foreach ($item_content as $field => $content) {
 996                                                         if (in_array($field, self::MIXED_CONTENT_FIELDLIST) && !empty($item_content[$field])) {
 997                                                                 if (self::isLegacyMode()) {
 998                                                                         $item_fields[$field] = null;
 999                                                                 } else {
1000                                                                         unset($item_fields[$field]);
1001                                                                 }
1002                                                         }
1003                                                 }
1004                                                 DBA::update('item', $item_fields, ['id' => $item['id']]);
1005                                         }
1006                                 }
1007                         }
1008
1009                         if (!is_null($tags)) {
1010                                 Term::insertFromTagFieldByItemId($item['id'], $tags);
1011                                 if (!empty($item['tag'])) {
1012                                         DBA::update('item', ['tag' => ''], ['id' => $item['id']]);
1013                                 }
1014                         }
1015
1016                         if (!is_null($files)) {
1017                                 Term::insertFromFileFieldByItemId($item['id'], $files);
1018                                 if (!empty($item['file'])) {
1019                                         DBA::update('item', ['file' => ''], ['id' => $item['id']]);
1020                                 }
1021                         }
1022
1023                         ItemDeliveryData::update($item['id'], $delivery_data);
1024
1025                         self::updateThread($item['id']);
1026
1027                         // We only need to notfiy others when it is an original entry from us.
1028                         // Only call the notifier when the item has some content relevant change.
1029                         if ($item['origin'] && in_array('edited', array_keys($fields))) {
1030                                 $notify_items[] = $item['id'];
1031                         }
1032                 }
1033
1034                 DBA::close($items);
1035                 DBA::commit();
1036
1037                 foreach ($notify_items as $notify_item) {
1038                         Worker::add(PRIORITY_HIGH, "Notifier", Delivery::POST, $notify_item);
1039                 }
1040
1041                 return $rows;
1042         }
1043
1044         /**
1045          * Delete an item and notify others about it - if it was ours
1046          *
1047          * @param array   $condition The condition for finding the item entries
1048          * @param integer $priority  Priority for the notification
1049          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1050          */
1051         public static function delete($condition, $priority = PRIORITY_HIGH)
1052         {
1053                 $items = self::select(['id'], $condition);
1054                 while ($item = self::fetch($items)) {
1055                         self::deleteById($item['id'], $priority);
1056                 }
1057                 DBA::close($items);
1058         }
1059
1060         /**
1061          * Delete an item for an user and notify others about it - if it was ours
1062          *
1063          * @param array   $condition The condition for finding the item entries
1064          * @param integer $uid       User who wants to delete this item
1065          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1066          */
1067         public static function deleteForUser($condition, $uid)
1068         {
1069                 if ($uid == 0) {
1070                         return;
1071                 }
1072
1073                 $items = self::select(['id', 'uid'], $condition);
1074                 while ($item = self::fetch($items)) {
1075                         // "Deleting" global items just means hiding them
1076                         if ($item['uid'] == 0) {
1077                                 DBA::update('user-item', ['hidden' => true], ['iid' => $item['id'], 'uid' => $uid], true);
1078
1079                                 // Delete notifications
1080                                 DBA::delete('notify', ['iid' => $item['id'], 'uid' => $uid]);
1081                         } elseif ($item['uid'] == $uid) {
1082                                 self::deleteById($item['id'], PRIORITY_HIGH);
1083                         } else {
1084                                 Logger::log('Wrong ownership. Not deleting item ' . $item['id']);
1085                         }
1086                 }
1087                 DBA::close($items);
1088         }
1089
1090         /**
1091          * Delete an item and notify others about it - if it was ours
1092          *
1093          * @param integer $item_id  Item ID that should be delete
1094          * @param integer $priority Priority for the notification
1095          *
1096          * @return boolean success
1097          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1098          */
1099         public static function deleteById($item_id, $priority = PRIORITY_HIGH)
1100         {
1101                 // locate item to be deleted
1102                 $fields = ['id', 'uri', 'uid', 'parent', 'parent-uri', 'origin',
1103                         'deleted', 'file', 'resource-id', 'event-id', 'attach',
1104                         'verb', 'object-type', 'object', 'target', 'contact-id',
1105                         'icid', 'iaid', 'psid'];
1106                 $item = self::selectFirst($fields, ['id' => $item_id]);
1107                 if (!DBA::isResult($item)) {
1108                         Logger::log('Item with ID ' . $item_id . " hasn't been found.", Logger::DEBUG);
1109                         return false;
1110                 }
1111
1112                 if ($item['deleted']) {
1113                         Logger::log('Item with ID ' . $item_id . ' has already been deleted.', Logger::DEBUG);
1114                         return false;
1115                 }
1116
1117                 $parent = self::selectFirst(['origin'], ['id' => $item['parent']]);
1118                 if (!DBA::isResult($parent)) {
1119                         $parent = ['origin' => false];
1120                 }
1121
1122                 // clean up categories and tags so they don't end up as orphans
1123
1124                 $matches = false;
1125                 $cnt = preg_match_all('/<(.*?)>/', $item['file'], $matches, PREG_SET_ORDER);
1126
1127                 if ($cnt) {
1128                         foreach ($matches as $mtch) {
1129                                 FileTag::unsaveFile($item['uid'], $item['id'], $mtch[1],true);
1130                         }
1131                 }
1132
1133                 $matches = false;
1134
1135                 $cnt = preg_match_all('/\[(.*?)\]/', $item['file'], $matches, PREG_SET_ORDER);
1136
1137                 if ($cnt) {
1138                         foreach ($matches as $mtch) {
1139                                 FileTag::unsaveFile($item['uid'], $item['id'], $mtch[1],false);
1140                         }
1141                 }
1142
1143                 /*
1144                  * If item is a link to a photo resource, nuke all the associated photos
1145                  * (visitors will not have photo resources)
1146                  * This only applies to photos uploaded from the photos page. Photos inserted into a post do not
1147                  * generate a resource-id and therefore aren't intimately linked to the item.
1148                  */
1149                 /// @TODO: this should first check if photo is used elsewhere
1150                 if (strlen($item['resource-id'])) {
1151                         Photo::delete(['resource-id' => $item['resource-id'], 'uid' => $item['uid']]);
1152                 }
1153
1154                 // If item is a link to an event, delete the event.
1155                 if (intval($item['event-id'])) {
1156                         Event::delete($item['event-id']);
1157                 }
1158
1159                 // If item has attachments, drop them
1160                 /// @TODO: this should first check if attachment is used elsewhere
1161                 foreach (explode(",", $item['attach']) as $attach) {
1162                         preg_match("|attach/(\d+)|", $attach, $matches);
1163                         if (is_array($matches) && count($matches) > 1) {
1164                                 Attach::delete(['id' => $matches[1], 'uid' => $item['uid']]);
1165                         }
1166                 }
1167
1168                 // Delete tags that had been attached to other items
1169                 self::deleteTagsFromItem($item);
1170
1171                 // Delete notifications
1172                 DBA::delete('notify', ['iid' => $item['id'], 'uid' => $item['uid']]);
1173
1174                 // Set the item to "deleted"
1175                 $item_fields = ['deleted' => true, 'edited' => DateTimeFormat::utcNow(), 'changed' => DateTimeFormat::utcNow()];
1176                 DBA::update('item', $item_fields, ['id' => $item['id']]);
1177
1178                 Term::insertFromTagFieldByItemId($item['id'], '');
1179                 Term::insertFromFileFieldByItemId($item['id'], '');
1180                 self::deleteThread($item['id'], $item['parent-uri']);
1181
1182                 if (!self::exists(["`uri` = ? AND `uid` != 0 AND NOT `deleted`", $item['uri']])) {
1183                         self::delete(['uri' => $item['uri'], 'uid' => 0, 'deleted' => false], $priority);
1184                 }
1185
1186                 ItemDeliveryData::delete($item['id']);
1187
1188                 // We don't delete the item-activity here, since we need some of the data for ActivityPub
1189
1190                 if (!empty($item['icid']) && !self::exists(['icid' => $item['icid'], 'deleted' => false])) {
1191                         DBA::delete('item-content', ['id' => $item['icid']], ['cascade' => false]);
1192                 }
1193                 // When the permission set will be used in photo and events as well,
1194                 // this query here needs to be extended.
1195                 // @todo Currently deactivated. We need the permission set in the deletion process.
1196                 // This is a reminder to add the removal somewhere else.
1197                 //if (!empty($item['psid']) && !self::exists(['psid' => $item['psid'], 'deleted' => false])) {
1198                 //      DBA::delete('permissionset', ['id' => $item['psid']], ['cascade' => false]);
1199                 //}
1200
1201                 // If it's the parent of a comment thread, kill all the kids
1202                 if ($item['id'] == $item['parent']) {
1203                         self::delete(['parent' => $item['parent'], 'deleted' => false], $priority);
1204                 }
1205
1206                 // Is it our comment and/or our thread?
1207                 if ($item['origin'] || $parent['origin']) {
1208
1209                         // When we delete the original post we will delete all existing copies on the server as well
1210                         self::delete(['uri' => $item['uri'], 'deleted' => false], $priority);
1211
1212                         // send the notification upstream/downstream
1213                         Worker::add(['priority' => $priority, 'dont_fork' => true], "Notifier", Delivery::DELETION, intval($item['id']));
1214                 } elseif ($item['uid'] != 0) {
1215
1216                         // When we delete just our local user copy of an item, we have to set a marker to hide it
1217                         $global_item = self::selectFirst(['id'], ['uri' => $item['uri'], 'uid' => 0, 'deleted' => false]);
1218                         if (DBA::isResult($global_item)) {
1219                                 DBA::update('user-item', ['hidden' => true], ['iid' => $global_item['id'], 'uid' => $item['uid']], true);
1220                         }
1221                 }
1222
1223                 Logger::log('Item with ID ' . $item_id . " has been deleted.", Logger::DEBUG);
1224
1225                 return true;
1226         }
1227
1228         private static function deleteTagsFromItem($item)
1229         {
1230                 if (($item["verb"] != Activity::TAG) || ($item["object-type"] != Activity\ObjectType::TAGTERM)) {
1231                         return;
1232                 }
1233
1234                 $xo = XML::parseString($item["object"], false);
1235                 $xt = XML::parseString($item["target"], false);
1236
1237                 if ($xt->type != Activity\ObjectType::NOTE) {
1238                         return;
1239                 }
1240
1241                 $i = self::selectFirst(['id', 'contact-id', 'tag'], ['uri' => $xt->id, 'uid' => $item['uid']]);
1242                 if (!DBA::isResult($i)) {
1243                         return;
1244                 }
1245
1246                 // For tags, the owner cannot remove the tag on the author's copy of the post.
1247                 $owner_remove = ($item["contact-id"] == $i["contact-id"]);
1248                 $author_copy = $item["origin"];
1249
1250                 if (($owner_remove && $author_copy) || !$owner_remove) {
1251                         return;
1252                 }
1253
1254                 $tags = explode(',', $i["tag"]);
1255                 $newtags = [];
1256                 if (count($tags)) {
1257                         foreach ($tags as $tag) {
1258                                 if (trim($tag) !== trim($xo->body)) {
1259                                        $newtags[] = trim($tag);
1260                                 }
1261                         }
1262                 }
1263                 self::update(['tag' => implode(',', $newtags)], ['id' => $i["id"]]);
1264         }
1265
1266         private static function guid($item, $notify)
1267         {
1268                 if (!empty($item['guid'])) {
1269                         return Strings::escapeTags(trim($item['guid']));
1270                 }
1271
1272                 if ($notify) {
1273                         // We have to avoid duplicates. So we create the GUID in form of a hash of the plink or uri.
1274                         // We add the hash of our own host because our host is the original creator of the post.
1275                         $prefix_host = DI::baseUrl()->getHostname();
1276                 } else {
1277                         $prefix_host = '';
1278
1279                         // We are only storing the post so we create a GUID from the original hostname.
1280                         if (!empty($item['author-link'])) {
1281                                 $parsed = parse_url($item['author-link']);
1282                                 if (!empty($parsed['host'])) {
1283                                         $prefix_host = $parsed['host'];
1284                                 }
1285                         }
1286
1287                         if (empty($prefix_host) && !empty($item['plink'])) {
1288                                 $parsed = parse_url($item['plink']);
1289                                 if (!empty($parsed['host'])) {
1290                                         $prefix_host = $parsed['host'];
1291                                 }
1292                         }
1293
1294                         if (empty($prefix_host) && !empty($item['uri'])) {
1295                                 $parsed = parse_url($item['uri']);
1296                                 if (!empty($parsed['host'])) {
1297                                         $prefix_host = $parsed['host'];
1298                                 }
1299                         }
1300
1301                         // Is it in the format data@host.tld? - Used for mail contacts
1302                         if (empty($prefix_host) && !empty($item['author-link']) && strstr($item['author-link'], '@')) {
1303                                 $mailparts = explode('@', $item['author-link']);
1304                                 $prefix_host = array_pop($mailparts);
1305                         }
1306                 }
1307
1308                 if (!empty($item['plink'])) {
1309                         $guid = self::guidFromUri($item['plink'], $prefix_host);
1310                 } elseif (!empty($item['uri'])) {
1311                         $guid = self::guidFromUri($item['uri'], $prefix_host);
1312                 } else {
1313                         $guid = System::createUUID(hash('crc32', $prefix_host));
1314                 }
1315
1316                 return $guid;
1317         }
1318
1319         private static function contactId($item)
1320         {
1321                 if (!empty($item['contact-id']) && DBA::exists('contact', ['self' => true, 'id' => $item['contact-id']])) {
1322                         return $item['contact-id'];
1323                 } elseif (($item['gravity'] == GRAVITY_PARENT) && !empty($item['uid']) && !empty($item['contact-id']) && Contact::isSharing($item['contact-id'], $item['uid'])) {
1324                         return $item['contact-id'];
1325                 } elseif (!empty($item['uid']) && !Contact::isSharing($item['author-id'], $item['uid'])) {
1326                         return $item['author-id'];
1327                 } elseif (!empty($item['contact-id'])) {
1328                         return $item['contact-id'];
1329                 } else {
1330                         $contact_id = Contact::getIdForURL($item['author-link'], $item['uid']);
1331                         if (!empty($contact_id)) {
1332                                 return $contact_id;
1333                         }
1334                 }
1335                 return $item['author-id'];
1336         }
1337
1338         // This function will finally cover most of the preparation functionality in mod/item.php
1339         public static function prepare(&$item)
1340         {
1341                 /*
1342                  * @TODO: Unused code triggering inspection errors
1343                  *
1344                 $data = BBCode::getAttachmentData($item['body']);
1345                 if ((preg_match_all("/\[bookmark\=([^\]]*)\](.*?)\[\/bookmark\]/ism", $item['body'], $match, PREG_SET_ORDER) || isset($data["type"]))
1346                         && ($posttype != Item::PT_PERSONAL_NOTE)) {
1347                         $posttype = Item::PT_PAGE;
1348                         $objecttype = ACTIVITY_OBJ_BOOKMARK;
1349                 }
1350                  */
1351         }
1352
1353         /**
1354          * Write an item array into a spool file to be inserted later.
1355          * This command is called whenever there are issues storing an item.
1356          *
1357          * @param array $item The item fields that are to be inserted
1358          * @throws \Exception
1359          */
1360         private static function spool($orig_item)
1361         {
1362                 // Now we store the data in the spool directory
1363                 // We use "microtime" to keep the arrival order and "mt_rand" to avoid duplicates
1364                 $file = 'item-' . round(microtime(true) * 10000) . '-' . mt_rand() . '.msg';
1365
1366                 $spoolpath = get_spoolpath();
1367                 if ($spoolpath != "") {
1368                         $spool = $spoolpath . '/' . $file;
1369
1370                         file_put_contents($spool, json_encode($orig_item));
1371                         Logger::warning("Item wasn't stored - Item was spooled into file", ['file' => $file]);
1372                 }
1373         }
1374
1375         public static function insert($item, $force_parent = false, $notify = false, $dontcache = false)
1376         {
1377                 $orig_item = $item;
1378
1379                 $priority = PRIORITY_HIGH;
1380
1381                 // If it is a posting where users should get notifications, then define it as wall posting
1382                 if ($notify) {
1383                         $item['wall'] = 1;
1384                         $item['origin'] = 1;
1385                         $item['network'] = Protocol::DFRN;
1386                         $item['protocol'] = Conversation::PARCEL_DFRN;
1387
1388                         if (is_int($notify)) {
1389                                 $priority = $notify;
1390                         }
1391                 } else {
1392                         $item['network'] = trim(($item['network'] ?? '') ?: Protocol::PHANTOM);
1393                 }
1394
1395                 $item['guid'] = self::guid($item, $notify);
1396                 $item['uri'] = Strings::escapeTags(trim(($item['uri'] ?? '') ?: self::newURI($item['uid'], $item['guid'])));
1397
1398                 // Store URI data
1399                 $item['uri-id'] = ItemURI::insert(['uri' => $item['uri'], 'guid' => $item['guid']]);
1400
1401                 // Store conversation data
1402                 $item = Conversation::insert($item);
1403
1404                 /*
1405                  * If a Diaspora signature structure was passed in, pull it out of the
1406                  * item array and set it aside for later storage.
1407                  */
1408
1409                 $dsprsig = null;
1410                 if (isset($item['dsprsig'])) {
1411                         $encoded_signature = $item['dsprsig'];
1412                         $dsprsig = json_decode(base64_decode($item['dsprsig']));
1413                         unset($item['dsprsig']);
1414                 }
1415
1416                 $diaspora_signed_text = '';
1417                 if (isset($item['diaspora_signed_text'])) {
1418                         $diaspora_signed_text = $item['diaspora_signed_text'];
1419                         unset($item['diaspora_signed_text']);
1420                 }
1421
1422                 // Converting the plink
1423                 /// @TODO Check if this is really still needed
1424                 if ($item['network'] == Protocol::OSTATUS) {
1425                         if (isset($item['plink'])) {
1426                                 $item['plink'] = OStatus::convertHref($item['plink']);
1427                         } elseif (isset($item['uri'])) {
1428                                 $item['plink'] = OStatus::convertHref($item['uri']);
1429                         }
1430                 }
1431
1432                 if (!empty($item['thr-parent'])) {
1433                         $item['parent-uri'] = $item['thr-parent'];
1434                 }
1435
1436                 $activity = DI::activity();
1437
1438                 if (isset($item['gravity'])) {
1439                         $item['gravity'] = intval($item['gravity']);
1440                 } elseif ($item['parent-uri'] === $item['uri']) {
1441                         $item['gravity'] = GRAVITY_PARENT;
1442                 } elseif ($activity->match($item['verb'], Activity::POST)) {
1443                         $item['gravity'] = GRAVITY_COMMENT;
1444                 } elseif ($activity->match($item['verb'], Activity::FOLLOW)) {
1445                         $item['gravity'] = GRAVITY_ACTIVITY;
1446                 } else {
1447                         $item['gravity'] = GRAVITY_UNKNOWN;   // Should not happen
1448                         Logger::log('Unknown gravity for verb: ' . $item['verb'], Logger::DEBUG);
1449                 }
1450
1451                 $uid = intval($item['uid']);
1452
1453                 // check for create date and expire time
1454                 $expire_interval = Config::get('system', 'dbclean-expire-days', 0);
1455
1456                 $user = DBA::selectFirst('user', ['expire'], ['uid' => $uid]);
1457                 if (DBA::isResult($user) && ($user['expire'] > 0) && (($user['expire'] < $expire_interval) || ($expire_interval == 0))) {
1458                         $expire_interval = $user['expire'];
1459                 }
1460
1461                 if (($expire_interval > 0) && !empty($item['created'])) {
1462                         $expire_date = time() - ($expire_interval * 86400);
1463                         $created_date = strtotime($item['created']);
1464                         if ($created_date < $expire_date) {
1465                                 Logger::notice('Item created before expiration interval.', [
1466                                         'created' => date('c', $created_date),
1467                                         'expired' => date('c', $expire_date),
1468                                         '$item' => $item
1469                                 ]);
1470                                 return 0;
1471                         }
1472                 }
1473
1474                 /*
1475                  * Do we already have this item?
1476                  * We have to check several networks since Friendica posts could be repeated
1477                  * via OStatus (maybe Diasporsa as well)
1478                  */
1479                 if (empty($item['network']) || in_array($item['network'], Protocol::FEDERATED)) {
1480                         $condition = ["`uri` = ? AND `uid` = ? AND `network` IN (?, ?, ?, ?)",
1481                                 trim($item['uri']), $item['uid'],
1482                                 Protocol::ACTIVITYPUB, Protocol::DIASPORA, Protocol::DFRN, Protocol::OSTATUS];
1483                         $existing = self::selectFirst(['id', 'network'], $condition);
1484                         if (DBA::isResult($existing)) {
1485                                 // We only log the entries with a different user id than 0. Otherwise we would have too many false positives
1486                                 if ($uid != 0) {
1487                                         Logger::notice('Item already existed for user', [
1488                                                 'uri' => $item['uri'],
1489                                                 'uid' => $uid,
1490                                                 'network' => $item['network'],
1491                                                 'existing_id' => $existing["id"],
1492                                                 'existing_network' => $existing["network"]
1493                                         ]);
1494                                 }
1495
1496                                 return $existing["id"];
1497                         }
1498                 }
1499
1500                 $item['wall']          = intval($item['wall'] ?? 0);
1501                 $item['extid']         = trim($item['extid'] ?? '');
1502                 $item['author-name']   = trim($item['author-name'] ?? '');
1503                 $item['author-link']   = trim($item['author-link'] ?? '');
1504                 $item['author-avatar'] = trim($item['author-avatar'] ?? '');
1505                 $item['owner-name']    = trim($item['owner-name'] ?? '');
1506                 $item['owner-link']    = trim($item['owner-link'] ?? '');
1507                 $item['owner-avatar']  = trim($item['owner-avatar'] ?? '');
1508                 $item['received']      = (isset($item['received'])  ? DateTimeFormat::utc($item['received'])  : DateTimeFormat::utcNow());
1509                 $item['created']       = (isset($item['created'])   ? DateTimeFormat::utc($item['created'])   : $item['received']);
1510                 $item['edited']        = (isset($item['edited'])    ? DateTimeFormat::utc($item['edited'])    : $item['created']);
1511                 $item['changed']       = (isset($item['changed'])   ? DateTimeFormat::utc($item['changed'])   : $item['created']);
1512                 $item['commented']     = (isset($item['commented']) ? DateTimeFormat::utc($item['commented']) : $item['created']);
1513                 $item['title']         = trim($item['title'] ?? '');
1514                 $item['location']      = trim($item['location'] ?? '');
1515                 $item['coord']         = trim($item['coord'] ?? '');
1516                 $item['visible']       = (isset($item['visible']) ? intval($item['visible']) : 1);
1517                 $item['deleted']       = 0;
1518                 $item['parent-uri']    = trim(($item['parent-uri'] ?? '') ?: $item['uri']);
1519                 $item['post-type']     = ($item['post-type'] ?? '') ?: self::PT_ARTICLE;
1520                 $item['verb']          = trim($item['verb'] ?? '');
1521                 $item['object-type']   = trim($item['object-type'] ?? '');
1522                 $item['object']        = trim($item['object'] ?? '');
1523                 $item['target-type']   = trim($item['target-type'] ?? '');
1524                 $item['target']        = trim($item['target'] ?? '');
1525                 $item['plink']         = trim($item['plink'] ?? '');
1526                 $item['allow_cid']     = trim($item['allow_cid'] ?? '');
1527                 $item['allow_gid']     = trim($item['allow_gid'] ?? '');
1528                 $item['deny_cid']      = trim($item['deny_cid'] ?? '');
1529                 $item['deny_gid']      = trim($item['deny_gid'] ?? '');
1530                 $item['private']       = intval($item['private'] ?? 0);
1531                 $item['body']          = trim($item['body'] ?? '');
1532                 $item['tag']           = trim($item['tag'] ?? '');
1533                 $item['attach']        = trim($item['attach'] ?? '');
1534                 $item['app']           = trim($item['app'] ?? '');
1535                 $item['origin']        = intval($item['origin'] ?? 0);
1536                 $item['postopts']      = trim($item['postopts'] ?? '');
1537                 $item['resource-id']   = trim($item['resource-id'] ?? '');
1538                 $item['event-id']      = intval($item['event-id'] ?? 0);
1539                 $item['inform']        = trim($item['inform'] ?? '');
1540                 $item['file']          = trim($item['file'] ?? '');
1541
1542                 // When there is no content then we don't post it
1543                 if ($item['body'].$item['title'] == '') {
1544                         Logger::notice('No body, no title.');
1545                         return 0;
1546                 }
1547
1548                 self::addLanguageToItemArray($item);
1549
1550                 // Items cannot be stored before they happen ...
1551                 if ($item['created'] > DateTimeFormat::utcNow()) {
1552                         $item['created'] = DateTimeFormat::utcNow();
1553                 }
1554
1555                 // We haven't invented time travel by now.
1556                 if ($item['edited'] > DateTimeFormat::utcNow()) {
1557                         $item['edited'] = DateTimeFormat::utcNow();
1558                 }
1559
1560                 $item['plink'] = ($item['plink'] ?? '') ?: DI::baseUrl() . '/display/' . urlencode($item['guid']);
1561
1562                 $default = ['url' => $item['author-link'], 'name' => $item['author-name'],
1563                         'photo' => $item['author-avatar'], 'network' => $item['network']];
1564
1565                 $item['author-id'] = ($item['author-id'] ?? 0) ?: Contact::getIdForURL($item['author-link'], 0, false, $default);
1566
1567                 if (Contact::isBlocked($item['author-id'])) {
1568                         Logger::notice('Author is blocked node-wide', ['author-link' => $item['author-link'], 'item-uri' => $item['uri']]);
1569                         return 0;
1570                 }
1571
1572                 if (!empty($item['author-link']) && Network::isUrlBlocked($item['author-link'])) {
1573                         Logger::notice('Author server is blocked', ['author-link' => $item['author-link'], 'item-uri' => $item['uri']]);
1574                         return 0;
1575                 }
1576
1577                 if (!empty($uid) && Contact::isBlockedByUser($item['author-id'], $uid)) {
1578                         Logger::notice('Author is blocked by user', ['author-link' => $item['author-link'], 'uid' => $uid, 'item-uri' => $item['uri']]);
1579                         return 0;
1580                 }
1581
1582                 $default = ['url' => $item['owner-link'], 'name' => $item['owner-name'],
1583                         'photo' => $item['owner-avatar'], 'network' => $item['network']];
1584
1585                 $item['owner-id'] = ($item['owner-id'] ?? 0) ?: Contact::getIdForURL($item['owner-link'], 0, false, $default);
1586
1587                 if (Contact::isBlocked($item['owner-id'])) {
1588                         Logger::notice('Owner is blocked node-wide', ['owner-link' => $item['owner-link'], 'item-uri' => $item['uri']]);
1589                         return 0;
1590                 }
1591
1592                 if (!empty($item['owner-link']) && Network::isUrlBlocked($item['owner-link'])) {
1593                         Logger::notice('Owner server is blocked', ['owner-link' => $item['owner-link'], 'item-uri' => $item['uri']]);
1594                         return 0;
1595                 }
1596
1597                 if (!empty($uid) && Contact::isBlockedByUser($item['owner-id'], $uid)) {
1598                         Logger::notice('Owner is blocked by user', ['owner-link' => $item['owner-link'], 'uid' => $uid, 'item-uri' => $item['uri']]);
1599                         return 0;
1600                 }
1601
1602                 // The causer is set during a thread completion, for example because of a reshare. It countains the responsible actor.
1603                 if (!empty($uid) && !empty($item['causer-id']) && Contact::isBlockedByUser($item['causer-id'], $uid)) {
1604                         Logger::notice('Causer is blocked by user', ['causer-link' => $item['causer-link'], 'uid' => $uid, 'item-uri' => $item['uri']]);
1605                         return 0;
1606                 }
1607
1608                 if (!empty($uid) && !empty($item['causer-id']) && ($item['parent-uri'] == $item['uri']) && Contact::isIgnoredByUser($item['causer-id'], $uid)) {
1609                         Logger::notice('Causer is ignored by user', ['causer-link' => $item['causer-link'], 'uid' => $uid, 'item-uri' => $item['uri']]);
1610                         return 0;
1611                 }
1612
1613                 // We don't store the causer, we only have it here for the checks above
1614                 unset($item['causer-id']);
1615                 unset($item['causer-link']);
1616
1617                 // The contact-id should be set before "self::insert" was called - but there seems to be issues sometimes
1618                 $item["contact-id"] = self::contactId($item);
1619
1620                 if ($item['network'] == Protocol::PHANTOM) {
1621                         $item['network'] = Protocol::DFRN;
1622                         Logger::notice('Missing network, setting to {network}.', [
1623                                 'uri' => $item["uri"],
1624                                 'network' => $item['network'],
1625                                 'callstack' => System::callstack()
1626                         ]);
1627                 }
1628
1629                 // Checking if there is already an item with the same guid
1630                 $condition = ['guid' => $item['guid'], 'network' => $item['network'], 'uid' => $item['uid']];
1631                 if (self::exists($condition)) {
1632                         Logger::notice('Found already existing item', [
1633                                 'guid' => $item['guid'],
1634                                 'uid' => $item['uid'],
1635                                 'network' => $item['network']
1636                         ]);
1637                         return 0;
1638                 }
1639
1640                 if ($item['verb'] == Activity::FOLLOW) {
1641                         if (!$item['origin'] && ($item['author-id'] == Contact::getPublicIdByUserId($uid))) {
1642                                 // Our own follow request can be relayed to us. We don't store it to avoid notification chaos.
1643                                 Logger::log("Follow: Don't store not origin follow request from us for " . $item['parent-uri'], Logger::DEBUG);
1644                                 return 0;
1645                         }
1646
1647                         $condition = ['verb' => Activity::FOLLOW, 'uid' => $item['uid'],
1648                                 'parent-uri' => $item['parent-uri'], 'author-id' => $item['author-id']];
1649                         if (self::exists($condition)) {
1650                                 // It happens that we receive multiple follow requests by the same author - we only store one.
1651                                 Logger::log('Follow: Found existing follow request from author ' . $item['author-id'] . ' for ' . $item['parent-uri'], Logger::DEBUG);
1652                                 return 0;
1653                         }
1654                 }
1655
1656                 // Check for hashtags in the body and repair or add hashtag links
1657                 self::setHashtags($item);
1658
1659                 $item['thr-parent'] = $item['parent-uri'];
1660
1661                 $notify_type = Delivery::POST;
1662                 $allow_cid = '';
1663                 $allow_gid = '';
1664                 $deny_cid  = '';
1665                 $deny_gid  = '';
1666
1667                 if ($item['parent-uri'] === $item['uri']) {
1668                         $parent_id = 0;
1669                         $parent_deleted = 0;
1670                         $allow_cid = $item['allow_cid'];
1671                         $allow_gid = $item['allow_gid'];
1672                         $deny_cid  = $item['deny_cid'];
1673                         $deny_gid  = $item['deny_gid'];
1674                 } else {
1675                         // find the parent and snarf the item id and ACLs
1676                         // and anything else we need to inherit
1677
1678                         $fields = ['uri', 'parent-uri', 'id', 'deleted',
1679                                 'allow_cid', 'allow_gid', 'deny_cid', 'deny_gid',
1680                                 'wall', 'private', 'forum_mode', 'origin'];
1681                         $condition = ['uri' => $item['parent-uri'], 'uid' => $item['uid']];
1682                         $params = ['order' => ['id' => false]];
1683                         $parent = self::selectFirst($fields, $condition, $params);
1684
1685                         if (DBA::isResult($parent)) {
1686                                 // is the new message multi-level threaded?
1687                                 // even though we don't support it now, preserve the info
1688                                 // and re-attach to the conversation parent.
1689
1690                                 if ($parent['uri'] != $parent['parent-uri']) {
1691                                         $item['parent-uri'] = $parent['parent-uri'];
1692
1693                                         $condition = ['uri' => $item['parent-uri'],
1694                                                 'parent-uri' => $item['parent-uri'],
1695                                                 'uid' => $item['uid']];
1696                                         $params = ['order' => ['id' => false]];
1697                                         $toplevel_parent = self::selectFirst($fields, $condition, $params);
1698
1699                                         if (DBA::isResult($toplevel_parent)) {
1700                                                 $parent = $toplevel_parent;
1701                                         }
1702                                 }
1703
1704                                 $parent_id      = $parent['id'];
1705                                 $parent_deleted = $parent['deleted'];
1706                                 $allow_cid      = $parent['allow_cid'];
1707                                 $allow_gid      = $parent['allow_gid'];
1708                                 $deny_cid       = $parent['deny_cid'];
1709                                 $deny_gid       = $parent['deny_gid'];
1710                                 $item['wall']   = $parent['wall'];
1711
1712                                 /*
1713                                  * If the parent is private, force privacy for the entire conversation
1714                                  * This differs from the above settings as it subtly allows comments from
1715                                  * email correspondents to be private even if the overall thread is not.
1716                                  */
1717                                 if ($parent['private']) {
1718                                         $item['private'] = $parent['private'];
1719                                 }
1720
1721                                 /*
1722                                  * Edge case. We host a public forum that was originally posted to privately.
1723                                  * The original author commented, but as this is a comment, the permissions
1724                                  * weren't fixed up so it will still show the comment as private unless we fix it here.
1725                                  */
1726                                 if ((intval($parent['forum_mode']) == 1) && $parent['private']) {
1727                                         $item['private'] = 0;
1728                                 }
1729
1730                                 // If its a post that originated here then tag the thread as "mention"
1731                                 if ($item['origin'] && $item['uid']) {
1732                                         DBA::update('thread', ['mention' => true], ['iid' => $parent_id]);
1733                                         Logger::log('tagged thread ' . $parent_id . ' as mention for user ' . $item['uid'], Logger::DEBUG);
1734                                 }
1735                         } else {
1736                                 /*
1737                                  * Allow one to see reply tweets from status.net even when
1738                                  * we don't have or can't see the original post.
1739                                  */
1740                                 if ($force_parent) {
1741                                         Logger::log('$force_parent=true, reply converted to top-level post.');
1742                                         $parent_id = 0;
1743                                         $item['parent-uri'] = $item['uri'];
1744                                         $item['gravity'] = GRAVITY_PARENT;
1745                                 } else {
1746                                         Logger::log('item parent '.$item['parent-uri'].' for '.$item['uid'].' was not found - ignoring item');
1747                                         return 0;
1748                                 }
1749
1750                                 $parent_deleted = 0;
1751                         }
1752                 }
1753
1754                 if (stristr($item['verb'], Activity::POKE)) {
1755                         $notify_type = Delivery::POKE;
1756                 }
1757
1758                 $item['parent-uri-id'] = ItemURI::getIdByURI($item['parent-uri']);
1759                 $item['thr-parent-id'] = ItemURI::getIdByURI($item['thr-parent']);
1760
1761                 $condition = ["`uri` = ? AND `network` IN (?, ?) AND `uid` = ?",
1762                         $item['uri'], $item['network'], Protocol::DFRN, $item['uid']];
1763                 if (self::exists($condition)) {
1764                         Logger::log('duplicated item with the same uri found. '.print_r($item,true));
1765                         return 0;
1766                 }
1767
1768                 // On Friendica and Diaspora the GUID is unique
1769                 if (in_array($item['network'], [Protocol::DFRN, Protocol::DIASPORA])) {
1770                         $condition = ['guid' => $item['guid'], 'uid' => $item['uid']];
1771                         if (self::exists($condition)) {
1772                                 Logger::log('duplicated item with the same guid found. '.print_r($item,true));
1773                                 return 0;
1774                         }
1775                 } elseif ($item['network'] == Protocol::OSTATUS) {
1776                         // Check for an existing post with the same content. There seems to be a problem with OStatus.
1777                         $condition = ["`body` = ? AND `network` = ? AND `created` = ? AND `contact-id` = ? AND `uid` = ?",
1778                                         $item['body'], $item['network'], $item['created'], $item['contact-id'], $item['uid']];
1779                         if (self::exists($condition)) {
1780                                 Logger::log('duplicated item with the same body found. '.print_r($item,true));
1781                                 return 0;
1782                         }
1783                 }
1784
1785                 // Is this item available in the global items (with uid=0)?
1786                 if ($item["uid"] == 0) {
1787                         $item["global"] = true;
1788
1789                         // Set the global flag on all items if this was a global item entry
1790                         DBA::update('item', ['global' => true], ['uri' => $item["uri"]]);
1791                 } else {
1792                         $item["global"] = self::exists(['uid' => 0, 'uri' => $item["uri"]]);
1793                 }
1794
1795                 // ACL settings
1796                 if (strlen($allow_cid) || strlen($allow_gid) || strlen($deny_cid) || strlen($deny_gid)) {
1797                         $private = 1;
1798                 } else {
1799                         $private = $item['private'];
1800                 }
1801
1802                 $item["allow_cid"] = $allow_cid;
1803                 $item["allow_gid"] = $allow_gid;
1804                 $item["deny_cid"] = $deny_cid;
1805                 $item["deny_gid"] = $deny_gid;
1806                 $item["private"] = $private;
1807                 $item["deleted"] = $parent_deleted;
1808
1809                 // Fill the cache field
1810                 self::putInCache($item);
1811
1812                 if ($notify) {
1813                         $item['edit'] = false;
1814                         $item['parent'] = $parent_id;
1815                         Hook::callAll('post_local', $item);
1816                         unset($item['edit']);
1817                         unset($item['parent']);
1818                 } else {
1819                         Hook::callAll('post_remote', $item);
1820                 }
1821
1822                 // This array field is used to trigger some automatic reactions
1823                 // It is mainly used in the "post_local" hook.
1824                 unset($item['api_source']);
1825
1826                 if (!empty($item['cancel'])) {
1827                         Logger::log('post cancelled by addon.');
1828                         return 0;
1829                 }
1830
1831                 /*
1832                  * Check for already added items.
1833                  * There is a timing issue here that sometimes creates double postings.
1834                  * An unique index would help - but the limitations of MySQL (maximum size of index values) prevent this.
1835                  */
1836                 if ($item["uid"] == 0) {
1837                         if (self::exists(['uri' => trim($item['uri']), 'uid' => 0])) {
1838                                 Logger::log('Global item already stored. URI: '.$item['uri'].' on network '.$item['network'], Logger::DEBUG);
1839                                 return 0;
1840                         }
1841                 }
1842
1843                 Logger::log('' . print_r($item,true), Logger::DATA);
1844
1845                 if (array_key_exists('tag', $item)) {
1846                         $tags = $item['tag'];
1847                         unset($item['tag']);
1848                 } else {
1849                         $tags = '';
1850                 }
1851
1852                 if (array_key_exists('file', $item)) {
1853                         $files = $item['file'];
1854                         unset($item['file']);
1855                 } else {
1856                         $files = '';
1857                 }
1858
1859                 // Creates or assigns the permission set
1860                 $item['psid'] = PermissionSet::fetchIDForPost($item);
1861
1862                 // We are doing this outside of the transaction to avoid timing problems
1863                 if (!self::insertActivity($item)) {
1864                         self::insertContent($item);
1865                 }
1866
1867                 $delivery_data = ItemDeliveryData::extractFields($item);
1868
1869                 unset($item['postopts']);
1870                 unset($item['inform']);
1871
1872                 // These fields aren't stored anymore in the item table, they are fetched upon request
1873                 unset($item['author-link']);
1874                 unset($item['author-name']);
1875                 unset($item['author-avatar']);
1876                 unset($item['author-network']);
1877
1878                 unset($item['owner-link']);
1879                 unset($item['owner-name']);
1880                 unset($item['owner-avatar']);
1881
1882                 $like_no_comment = Config::get('system', 'like_no_comment');
1883
1884                 DBA::transaction();
1885                 $ret = DBA::insert('item', $item);
1886
1887                 // When the item was successfully stored we fetch the ID of the item.
1888                 if (DBA::isResult($ret)) {
1889                         $current_post = DBA::lastInsertId();
1890                 } else {
1891                         // This can happen - for example - if there are locking timeouts.
1892                         DBA::rollback();
1893
1894                         // Store the data into a spool file so that we can try again later.
1895                         self::spool($orig_item);
1896                         return 0;
1897                 }
1898
1899                 if ($current_post == 0) {
1900                         // This is one of these error messages that never should occur.
1901                         Logger::log("couldn't find created item - we better quit now.");
1902                         DBA::rollback();
1903                         return 0;
1904                 }
1905
1906                 // How much entries have we created?
1907                 // We wouldn't need this query when we could use an unique index - but MySQL has length problems with them.
1908                 $entries = DBA::count('item', ['uri' => $item['uri'], 'uid' => $item['uid'], 'network' => $item['network']]);
1909
1910                 if ($entries > 1) {
1911                         // There are duplicates. We delete our just created entry.
1912                         Logger::log('Duplicated post occurred. uri = ' . $item['uri'] . ' uid = ' . $item['uid']);
1913
1914                         // Yes, we could do a rollback here - but we are having many users with MyISAM.
1915                         DBA::delete('item', ['id' => $current_post]);
1916                         DBA::commit();
1917                         return 0;
1918                 } elseif ($entries == 0) {
1919                         // This really should never happen since we quit earlier if there were problems.
1920                         Logger::log("Something is terribly wrong. We haven't found our created entry.");
1921                         DBA::rollback();
1922                         return 0;
1923                 }
1924
1925                 Logger::log('created item '.$current_post);
1926
1927                 if (!$parent_id || ($item['parent-uri'] === $item['uri'])) {
1928                         $parent_id = $current_post;
1929                 }
1930
1931                 // Set parent id
1932                 DBA::update('item', ['parent' => $parent_id], ['id' => $current_post]);
1933
1934                 $item['id'] = $current_post;
1935                 $item['parent'] = $parent_id;
1936
1937                 // update the commented timestamp on the parent
1938                 // Only update "commented" if it is really a comment
1939                 if (($item['gravity'] != GRAVITY_ACTIVITY) || !$like_no_comment) {
1940                         DBA::update('item', ['commented' => DateTimeFormat::utcNow(), 'changed' => DateTimeFormat::utcNow()], ['id' => $parent_id]);
1941                 } else {
1942                         DBA::update('item', ['changed' => DateTimeFormat::utcNow()], ['id' => $parent_id]);
1943                 }
1944
1945                 if ($dsprsig) {
1946                         /*
1947                          * Friendica servers lower than 3.4.3-2 had double encoded the signature ...
1948                          * We can check for this condition when we decode and encode the stuff again.
1949                          */
1950                         if (base64_encode(base64_decode(base64_decode($dsprsig->signature))) == base64_decode($dsprsig->signature)) {
1951                                 $dsprsig->signature = base64_decode($dsprsig->signature);
1952                                 Logger::log("Repaired double encoded signature from handle ".$dsprsig->signer, Logger::DEBUG);
1953                         }
1954
1955                         if (!empty($dsprsig->signed_text) && empty($dsprsig->signature) && empty($dsprsig->signer)) {
1956                                 DBA::insert('diaspora-interaction', ['uri-id' => $item['uri-id'], 'interaction' => $dsprsig->signed_text], true);
1957                         } else {
1958                                 // The other fields are used by very old Friendica servers, so we currently store them differently
1959                                 DBA::insert('sign', ['iid' => $current_post, 'signed_text' => $dsprsig->signed_text,
1960                                         'signature' => $dsprsig->signature, 'signer' => $dsprsig->signer]);
1961                         }
1962                 }
1963
1964                 if (!empty($diaspora_signed_text)) {
1965                         DBA::insert('diaspora-interaction', ['uri-id' => $item['uri-id'], 'interaction' => $diaspora_signed_text], true);
1966                 }
1967
1968                 if ($item['parent-uri'] === $item['uri']) {
1969                         self::addThread($current_post);
1970                 } else {
1971                         self::updateThread($parent_id);
1972                 }
1973
1974                 if (!empty($item['origin']) || !empty($item['wall']) || !empty($delivery_data['postopts']) || !empty($delivery_data['inform'])) {
1975                         ItemDeliveryData::insert($current_post, $delivery_data);
1976                 }
1977
1978                 DBA::commit();
1979
1980                 /*
1981                  * Due to deadlock issues with the "term" table we are doing these steps after the commit.
1982                  * This is not perfect - but a workable solution until we found the reason for the problem.
1983                  */
1984                 if (!empty($tags)) {
1985                         Term::insertFromTagFieldByItemId($current_post, $tags);
1986                 }
1987
1988                 if (!empty($files)) {
1989                         Term::insertFromFileFieldByItemId($current_post, $files);
1990                 }
1991
1992                 // In that function we check if this is a forum post. Additionally we delete the item under certain circumstances
1993                 if (self::tagDeliver($item['uid'], $current_post)) {
1994                         // Get the user information for the logging
1995                         $user = User::getById($uid);
1996
1997                         Logger::notice('Item had been deleted', ['id' => $current_post, 'user' => $uid, 'account-type' => $user['account-type']]);
1998                         return 0;
1999                 }
2000
2001                 if (!$dontcache) {
2002                         $posted_item = self::selectFirst(self::ITEM_FIELDLIST, ['id' => $current_post]);
2003                         if (DBA::isResult($posted_item)) {
2004                                 if ($notify) {
2005                                         Hook::callAll('post_local_end', $posted_item);
2006                                 } else {
2007                                         Hook::callAll('post_remote_end', $posted_item);
2008                                 }
2009                         } else {
2010                                 Logger::log('new item not found in DB, id ' . $current_post);
2011                         }
2012                 }
2013
2014                 if ($item['parent-uri'] === $item['uri']) {
2015                         self::addShadow($current_post);
2016                 } else {
2017                         self::addShadowPost($current_post);
2018                 }
2019
2020                 self::updateContact($item);
2021
2022                 UserItem::setNotification($current_post);
2023
2024                 check_user_notification($current_post);
2025
2026                 if ($notify || ($item['visible'] && ((!empty($parent) && $parent['origin']) || $item['origin']))) {
2027                         Worker::add(['priority' => $priority, 'dont_fork' => true], 'Notifier', $notify_type, $current_post);
2028                 }
2029
2030                 return $current_post;
2031         }
2032
2033         /**
2034          * Insert a new item content entry
2035          *
2036          * @param array $item The item fields that are to be inserted
2037          * @return bool
2038          * @throws \Exception
2039          */
2040         private static function insertActivity(&$item)
2041         {
2042                 $activity_index = self::activityToIndex($item['verb']);
2043
2044                 if ($activity_index < 0) {
2045                         return false;
2046                 }
2047
2048                 $fields = ['activity' => $activity_index, 'uri-hash' => (string)$item['uri-id'], 'uri-id' => $item['uri-id']];
2049
2050                 // We just remove everything that is content
2051                 foreach (array_merge(self::CONTENT_FIELDLIST, self::MIXED_CONTENT_FIELDLIST) as $field) {
2052                         unset($item[$field]);
2053                 }
2054
2055                 // To avoid timing problems, we are using locks.
2056                 $locked = DI::lock()->acquire('item_insert_activity');
2057                 if (!$locked) {
2058                         Logger::log("Couldn't acquire lock for URI " . $item['uri'] . " - proceeding anyway.");
2059                 }
2060
2061                 // Do we already have this content?
2062                 $item_activity = DBA::selectFirst('item-activity', ['id'], ['uri-id' => $item['uri-id']]);
2063                 if (DBA::isResult($item_activity)) {
2064                         $item['iaid'] = $item_activity['id'];
2065                         Logger::log('Fetched activity for URI ' . $item['uri'] . ' (' . $item['iaid'] . ')');
2066                 } elseif (DBA::insert('item-activity', $fields)) {
2067                         $item['iaid'] = DBA::lastInsertId();
2068                         Logger::log('Inserted activity for URI ' . $item['uri'] . ' (' . $item['iaid'] . ')');
2069                 } else {
2070                         // This shouldn't happen.
2071                         Logger::log('Could not insert activity for URI ' . $item['uri'] . ' - should not happen');
2072                         DI::lock()->release('item_insert_activity');
2073                         return false;
2074                 }
2075                 if ($locked) {
2076                         DI::lock()->release('item_insert_activity');
2077                 }
2078                 return true;
2079         }
2080
2081         /**
2082          * Insert a new item content entry
2083          *
2084          * @param array $item The item fields that are to be inserted
2085          * @throws \Exception
2086          */
2087         private static function insertContent(&$item)
2088         {
2089                 $fields = ['uri-plink-hash' => (string)$item['uri-id'], 'uri-id' => $item['uri-id']];
2090
2091                 foreach (array_merge(self::CONTENT_FIELDLIST, self::MIXED_CONTENT_FIELDLIST) as $field) {
2092                         if (isset($item[$field])) {
2093                                 $fields[$field] = $item[$field];
2094                                 unset($item[$field]);
2095                         }
2096                 }
2097
2098                 // To avoid timing problems, we are using locks.
2099                 $locked = DI::lock()->acquire('item_insert_content');
2100                 if (!$locked) {
2101                         Logger::log("Couldn't acquire lock for URI " . $item['uri'] . " - proceeding anyway.");
2102                 }
2103
2104                 // Do we already have this content?
2105                 $item_content = DBA::selectFirst('item-content', ['id'], ['uri-id' => $item['uri-id']]);
2106                 if (DBA::isResult($item_content)) {
2107                         $item['icid'] = $item_content['id'];
2108                         Logger::log('Fetched content for URI ' . $item['uri'] . ' (' . $item['icid'] . ')');
2109                 } elseif (DBA::insert('item-content', $fields)) {
2110                         $item['icid'] = DBA::lastInsertId();
2111                         Logger::log('Inserted content for URI ' . $item['uri'] . ' (' . $item['icid'] . ')');
2112                 } else {
2113                         // This shouldn't happen.
2114                         Logger::log('Could not insert content for URI ' . $item['uri'] . ' - should not happen');
2115                 }
2116                 if ($locked) {
2117                         DI::lock()->release('item_insert_content');
2118                 }
2119         }
2120
2121         /**
2122          * Update existing item content entries
2123          *
2124          * @param array $item      The item fields that are to be changed
2125          * @param array $condition The condition for finding the item content entries
2126          * @return bool
2127          * @throws \Exception
2128          */
2129         private static function updateActivity($item, $condition)
2130         {
2131                 if (empty($item['verb'])) {
2132                         return false;
2133                 }
2134                 $activity_index = self::activityToIndex($item['verb']);
2135
2136                 if ($activity_index < 0) {
2137                         return false;
2138                 }
2139
2140                 $fields = ['activity' => $activity_index];
2141
2142                 Logger::log('Update activity for ' . json_encode($condition));
2143
2144                 DBA::update('item-activity', $fields, $condition, true);
2145
2146                 return true;
2147         }
2148
2149         /**
2150          * Update existing item content entries
2151          *
2152          * @param array $item      The item fields that are to be changed
2153          * @param array $condition The condition for finding the item content entries
2154          * @throws \Exception
2155          */
2156         private static function updateContent($item, $condition)
2157         {
2158                 // We have to select only the fields from the "item-content" table
2159                 $fields = [];
2160                 foreach (array_merge(self::CONTENT_FIELDLIST, self::MIXED_CONTENT_FIELDLIST) as $field) {
2161                         if (isset($item[$field])) {
2162                                 $fields[$field] = $item[$field];
2163                         }
2164                 }
2165
2166                 if (empty($fields)) {
2167                         // when there are no fields at all, just use the condition
2168                         // This is to ensure that we always store content.
2169                         $fields = $condition;
2170                 }
2171
2172                 Logger::log('Update content for ' . json_encode($condition));
2173
2174                 DBA::update('item-content', $fields, $condition, true);
2175         }
2176
2177         /**
2178          * Distributes public items to the receivers
2179          *
2180          * @param integer $itemid      Item ID that should be added
2181          * @param string  $signed_text Original text (for Diaspora signatures), JSON encoded.
2182          * @throws \Exception
2183          */
2184         public static function distribute($itemid, $signed_text = '')
2185         {
2186                 $condition = ["`id` IN (SELECT `parent` FROM `item` WHERE `id` = ?)", $itemid];
2187                 $parent = self::selectFirst(['owner-id'], $condition);
2188                 if (!DBA::isResult($parent)) {
2189                         return;
2190                 }
2191
2192                 // Only distribute public items from native networks
2193                 $condition = ['id' => $itemid, 'uid' => 0,
2194                         'network' => array_merge(Protocol::FEDERATED ,['']),
2195                         'visible' => true, 'deleted' => false, 'moderated' => false, 'private' => false];
2196                 $item = self::selectFirst(self::ITEM_FIELDLIST, $condition);
2197                 if (!DBA::isResult($item)) {
2198                         return;
2199                 }
2200
2201                 $origin = $item['origin'];
2202
2203                 unset($item['id']);
2204                 unset($item['parent']);
2205                 unset($item['mention']);
2206                 unset($item['wall']);
2207                 unset($item['origin']);
2208                 unset($item['starred']);
2209
2210                 $users = [];
2211
2212                 /// @todo add a field "pcid" in the contact table that referrs to the public contact id.
2213                 $owner = DBA::selectFirst('contact', ['url', 'nurl', 'alias'], ['id' => $parent['owner-id']]);
2214                 if (!DBA::isResult($owner)) {
2215                         return;
2216                 }
2217
2218                 $condition = ['nurl' => $owner['nurl'], 'rel' => [Contact::SHARING, Contact::FRIEND]];
2219                 $contacts = DBA::select('contact', ['uid'], $condition);
2220                 while ($contact = DBA::fetch($contacts)) {
2221                         if ($contact['uid'] == 0) {
2222                                 continue;
2223                         }
2224
2225                         $users[$contact['uid']] = $contact['uid'];
2226                 }
2227                 DBA::close($contacts);
2228
2229                 $condition = ['alias' => $owner['url'], 'rel' => [Contact::SHARING, Contact::FRIEND]];
2230                 $contacts = DBA::select('contact', ['uid'], $condition);
2231                 while ($contact = DBA::fetch($contacts)) {
2232                         if ($contact['uid'] == 0) {
2233                                 continue;
2234                         }
2235
2236                         $users[$contact['uid']] = $contact['uid'];
2237                 }
2238                 DBA::close($contacts);
2239
2240                 if (!empty($owner['alias'])) {
2241                         $condition = ['url' => $owner['alias'], 'rel' => [Contact::SHARING, Contact::FRIEND]];
2242                         $contacts = DBA::select('contact', ['uid'], $condition);
2243                         while ($contact = DBA::fetch($contacts)) {
2244                                 if ($contact['uid'] == 0) {
2245                                         continue;
2246                                 }
2247
2248                                 $users[$contact['uid']] = $contact['uid'];
2249                         }
2250                         DBA::close($contacts);
2251                 }
2252
2253                 $origin_uid = 0;
2254
2255                 if ($item['uri'] != $item['parent-uri']) {
2256                         $parents = self::select(['uid', 'origin'], ["`uri` = ? AND `uid` != 0", $item['parent-uri']]);
2257                         while ($parent = self::fetch($parents)) {
2258                                 $users[$parent['uid']] = $parent['uid'];
2259                                 if ($parent['origin'] && !$origin) {
2260                                         $origin_uid = $parent['uid'];
2261                                 }
2262                         }
2263                 }
2264
2265                 foreach ($users as $uid) {
2266                         if ($origin_uid == $uid) {
2267                                 $item['diaspora_signed_text'] = $signed_text;
2268                         }
2269                         self::storeForUser($itemid, $item, $uid);
2270                 }
2271         }
2272
2273         /**
2274          * Store public items for the receivers
2275          *
2276          * @param integer $itemid Item ID that should be added
2277          * @param array   $item   The item entry that will be stored
2278          * @param integer $uid    The user that will receive the item entry
2279          * @throws \Exception
2280          */
2281         private static function storeForUser($itemid, $item, $uid)
2282         {
2283                 $item['uid'] = $uid;
2284                 $item['origin'] = 0;
2285                 $item['wall'] = 0;
2286                 if ($item['uri'] == $item['parent-uri']) {
2287                         $item['contact-id'] = Contact::getIdForURL($item['owner-link'], $uid);
2288                 } else {
2289                         $item['contact-id'] = Contact::getIdForURL($item['author-link'], $uid);
2290                 }
2291
2292                 if (empty($item['contact-id'])) {
2293                         $self = DBA::selectFirst('contact', ['id'], ['self' => true, 'uid' => $uid]);
2294                         if (!DBA::isResult($self)) {
2295                                 return;
2296                         }
2297                         $item['contact-id'] = $self['id'];
2298                 }
2299
2300                 /// @todo Handling of "event-id"
2301
2302                 $notify = false;
2303                 if ($item['uri'] == $item['parent-uri']) {
2304                         $contact = DBA::selectFirst('contact', [], ['id' => $item['contact-id'], 'self' => false]);
2305                         if (DBA::isResult($contact)) {
2306                                 $notify = self::isRemoteSelf($contact, $item);
2307                         }
2308                 }
2309
2310                 $distributed = self::insert($item, false, $notify, true);
2311
2312                 if (!$distributed) {
2313                         Logger::log("Distributed public item " . $itemid . " for user " . $uid . " wasn't stored", Logger::DEBUG);
2314                 } else {
2315                         Logger::log("Distributed public item " . $itemid . " for user " . $uid . " with id " . $distributed, Logger::DEBUG);
2316                 }
2317         }
2318
2319         /**
2320          * Add a shadow entry for a given item id that is a thread starter
2321          *
2322          * We store every public item entry additionally with the user id "0".
2323          * This is used for the community page and for the search.
2324          * It is planned that in the future we will store public item entries only once.
2325          *
2326          * @param integer $itemid Item ID that should be added
2327          * @throws \Exception
2328          */
2329         public static function addShadow($itemid)
2330         {
2331                 $fields = ['uid', 'private', 'moderated', 'visible', 'deleted', 'network', 'uri'];
2332                 $condition = ['id' => $itemid, 'parent' => [0, $itemid]];
2333                 $item = self::selectFirst($fields, $condition);
2334
2335                 if (!DBA::isResult($item)) {
2336                         return;
2337                 }
2338
2339                 // is it already a copy?
2340                 if (($itemid == 0) || ($item['uid'] == 0)) {
2341                         return;
2342                 }
2343
2344                 // Is it a visible public post?
2345                 if (!$item["visible"] || $item["deleted"] || $item["moderated"] || $item["private"]) {
2346                         return;
2347                 }
2348
2349                 // is it an entry from a connector? Only add an entry for natively connected networks
2350                 if (!in_array($item["network"], array_merge(Protocol::FEDERATED ,['']))) {
2351                         return;
2352                 }
2353
2354                 if (self::exists(['uri' => $item['uri'], 'uid' => 0])) {
2355                         return;
2356                 }
2357
2358                 $item = self::selectFirst(self::ITEM_FIELDLIST, ['id' => $itemid]);
2359
2360                 if (DBA::isResult($item)) {
2361                         // Preparing public shadow (removing user specific data)
2362                         $item['uid'] = 0;
2363                         unset($item['id']);
2364                         unset($item['parent']);
2365                         unset($item['wall']);
2366                         unset($item['mention']);
2367                         unset($item['origin']);
2368                         unset($item['starred']);
2369                         unset($item['postopts']);
2370                         unset($item['inform']);
2371                         if ($item['uri'] == $item['parent-uri']) {
2372                                 $item['contact-id'] = $item['owner-id'];
2373                         } else {
2374                                 $item['contact-id'] = $item['author-id'];
2375                         }
2376
2377                         $public_shadow = self::insert($item, false, false, true);
2378
2379                         Logger::log("Stored public shadow for thread ".$itemid." under id ".$public_shadow, Logger::DEBUG);
2380                 }
2381         }
2382
2383         /**
2384          * Add a shadow entry for a given item id that is a comment
2385          *
2386          * This function does the same like the function above - but for comments
2387          *
2388          * @param integer $itemid Item ID that should be added
2389          * @throws \Exception
2390          */
2391         public static function addShadowPost($itemid)
2392         {
2393                 $item = self::selectFirst(self::ITEM_FIELDLIST, ['id' => $itemid]);
2394                 if (!DBA::isResult($item)) {
2395                         return;
2396                 }
2397
2398                 // Is it a toplevel post?
2399                 if ($item['id'] == $item['parent']) {
2400                         self::addShadow($itemid);
2401                         return;
2402                 }
2403
2404                 // Is this a shadow entry?
2405                 if ($item['uid'] == 0) {
2406                         return;
2407                 }
2408
2409                 // Is there a shadow parent?
2410                 if (!self::exists(['uri' => $item['parent-uri'], 'uid' => 0])) {
2411                         return;
2412                 }
2413
2414                 // Is there already a shadow entry?
2415                 if (self::exists(['uri' => $item['uri'], 'uid' => 0])) {
2416                         return;
2417                 }
2418
2419                 // Save "origin" and "parent" state
2420                 $origin = $item['origin'];
2421                 $parent = $item['parent'];
2422
2423                 // Preparing public shadow (removing user specific data)
2424                 $item['uid'] = 0;
2425                 unset($item['id']);
2426                 unset($item['parent']);
2427                 unset($item['wall']);
2428                 unset($item['mention']);
2429                 unset($item['origin']);
2430                 unset($item['starred']);
2431                 unset($item['postopts']);
2432                 unset($item['inform']);
2433                 $item['contact-id'] = Contact::getIdForURL($item['author-link']);
2434
2435                 $public_shadow = self::insert($item, false, false, true);
2436
2437                 Logger::log("Stored public shadow for comment ".$item['uri']." under id ".$public_shadow, Logger::DEBUG);
2438
2439                 // If this was a comment to a Diaspora post we don't get our comment back.
2440                 // This means that we have to distribute the comment by ourselves.
2441                 if ($origin && self::exists(['id' => $parent, 'network' => Protocol::DIASPORA])) {
2442                         self::distribute($public_shadow);
2443                 }
2444         }
2445
2446         /**
2447          * Adds a language specification in a "language" element of given $arr.
2448          * Expects "body" element to exist in $arr.
2449          *
2450          * @param $item
2451          * @throws \Text_LanguageDetect_Exception
2452          */
2453         private static function addLanguageToItemArray(&$item)
2454         {
2455                 $naked_body = BBCode::toPlaintext($item['body'], false);
2456
2457                 $ld = new Text_LanguageDetect();
2458                 $ld->setNameMode(2);
2459                 $languages = $ld->detect($naked_body, 3);
2460
2461                 if (is_array($languages)) {
2462                         $item['language'] = json_encode($languages);
2463                 }
2464         }
2465
2466         /**
2467          * Creates an unique guid out of a given uri
2468          *
2469          * @param string $uri uri of an item entry
2470          * @param string $host hostname for the GUID prefix
2471          * @return string unique guid
2472          */
2473         public static function guidFromUri($uri, $host)
2474         {
2475                 // Our regular guid routine is using this kind of prefix as well
2476                 // We have to avoid that different routines could accidentally create the same value
2477                 $parsed = parse_url($uri);
2478
2479                 // We use a hash of the hostname as prefix for the guid
2480                 $guid_prefix = hash("crc32", $host);
2481
2482                 // Remove the scheme to make sure that "https" and "http" doesn't make a difference
2483                 unset($parsed["scheme"]);
2484
2485                 // Glue it together to be able to make a hash from it
2486                 $host_id = implode("/", $parsed);
2487
2488                 // We could use any hash algorithm since it isn't a security issue
2489                 $host_hash = hash("ripemd128", $host_id);
2490
2491                 return $guid_prefix.$host_hash;
2492         }
2493
2494         /**
2495          * generate an unique URI
2496          *
2497          * @param integer $uid  User id
2498          * @param string  $guid An existing GUID (Otherwise it will be generated)
2499          *
2500          * @return string
2501          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
2502          */
2503         public static function newURI($uid, $guid = "")
2504         {
2505                 if ($guid == "") {
2506                         $guid = System::createUUID();
2507                 }
2508
2509                 return DI::baseUrl()->get() . '/objects/' . $guid;
2510         }
2511
2512         /**
2513          * Set "success_update" and "last-item" to the date of the last time we heard from this contact
2514          *
2515          * This can be used to filter for inactive contacts.
2516          * Only do this for public postings to avoid privacy problems, since poco data is public.
2517          * Don't set this value if it isn't from the owner (could be an author that we don't know)
2518          *
2519          * @param array $arr Contains the just posted item record
2520          * @throws \Exception
2521          */
2522         private static function updateContact($arr)
2523         {
2524                 // Unarchive the author
2525                 $contact = DBA::selectFirst('contact', [], ['id' => $arr["author-id"]]);
2526                 if (DBA::isResult($contact)) {
2527                         Contact::unmarkForArchival($contact);
2528                 }
2529
2530                 // Unarchive the contact if it's not our own contact
2531                 $contact = DBA::selectFirst('contact', [], ['id' => $arr["contact-id"], 'self' => false]);
2532                 if (DBA::isResult($contact)) {
2533                         Contact::unmarkForArchival($contact);
2534                 }
2535
2536                 $update = (!$arr['private'] && ((($arr['author-link'] ?? '') === ($arr['owner-link'] ?? '')) || ($arr["parent-uri"] === $arr["uri"])));
2537
2538                 // Is it a forum? Then we don't care about the rules from above
2539                 if (!$update && in_array($arr["network"], [Protocol::ACTIVITYPUB, Protocol::DFRN]) && ($arr["parent-uri"] === $arr["uri"])) {
2540                         if (DBA::exists('contact', ['id' => $arr['contact-id'], 'forum' => true])) {
2541                                 $update = true;
2542                         }
2543                 }
2544
2545                 if ($update) {
2546                         DBA::update('contact', ['success_update' => $arr['received'], 'last-item' => $arr['received']],
2547                                 ['id' => $arr['contact-id']]);
2548                 }
2549                 // Now do the same for the system wide contacts with uid=0
2550                 if (!$arr['private']) {
2551                         DBA::update('contact', ['success_update' => $arr['received'], 'last-item' => $arr['received']],
2552                                 ['id' => $arr['owner-id']]);
2553
2554                         if ($arr['owner-id'] != $arr['author-id']) {
2555                                 DBA::update('contact', ['success_update' => $arr['received'], 'last-item' => $arr['received']],
2556                                         ['id' => $arr['author-id']]);
2557                         }
2558                 }
2559         }
2560
2561         public static function setHashtags(&$item)
2562         {
2563                 $tags = BBCode::getTags($item["body"]);
2564
2565                 // No hashtags?
2566                 if (!count($tags)) {
2567                         return false;
2568                 }
2569
2570                 // What happens in [code], stays in [code]!
2571                 // escape the # and the [
2572                 // hint: we will also get in trouble with #tags, when we want markdown in posts -> ### Headline 3
2573                 $item["body"] = preg_replace_callback("/\[code(.*?)\](.*?)\[\/code\]/ism",
2574                         function ($match) {
2575                                 // we truly ESCape all # and [ to prevent gettin weird tags in [code] blocks
2576                                 $find = ['#', '['];
2577                                 $replace = [chr(27).'sharp', chr(27).'leftsquarebracket'];
2578                                 return ("[code" . $match[1] . "]" . str_replace($find, $replace, $match[2]) . "[/code]");
2579                         }, $item["body"]);
2580
2581                 // This sorting is important when there are hashtags that are part of other hashtags
2582                 // Otherwise there could be problems with hashtags like #test and #test2
2583                 rsort($tags);
2584
2585                 $URLSearchString = "^\[\]";
2586
2587                 // All hashtags should point to the home server if "local_tags" is activated
2588                 if (Config::get('system', 'local_tags')) {
2589                         $item["body"] = preg_replace("/#\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",
2590                                         "#[url=".DI::baseUrl()."/search?tag=$2]$2[/url]", $item["body"]);
2591
2592                         $item["tag"] = preg_replace("/#\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",
2593                                         "#[url=".DI::baseUrl()."/search?tag=$2]$2[/url]", $item["tag"]);
2594                 }
2595
2596                 // mask hashtags inside of url, bookmarks and attachments to avoid urls in urls
2597                 $item["body"] = preg_replace_callback("/\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",
2598                         function ($match) {
2599                                 return ("[url=" . str_replace("#", "&num;", $match[1]) . "]" . str_replace("#", "&num;", $match[2]) . "[/url]");
2600                         }, $item["body"]);
2601
2602                 $item["body"] = preg_replace_callback("/\[bookmark\=([$URLSearchString]*)\](.*?)\[\/bookmark\]/ism",
2603                         function ($match) {
2604                                 return ("[bookmark=" . str_replace("#", "&num;", $match[1]) . "]" . str_replace("#", "&num;", $match[2]) . "[/bookmark]");
2605                         }, $item["body"]);
2606
2607                 $item["body"] = preg_replace_callback("/\[attachment (.*)\](.*?)\[\/attachment\]/ism",
2608                         function ($match) {
2609                                 return ("[attachment " . str_replace("#", "&num;", $match[1]) . "]" . $match[2] . "[/attachment]");
2610                         }, $item["body"]);
2611
2612                 // Repair recursive urls
2613                 $item["body"] = preg_replace("/&num;\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",
2614                                 "&num;$2", $item["body"]);
2615
2616                 foreach ($tags as $tag) {
2617                         if ((strpos($tag, '#') !== 0) || strpos($tag, '[url=') || strlen($tag) < 2 || $tag[1] == '#') {
2618                                 continue;
2619                         }
2620
2621                         $basetag = str_replace('_',' ',substr($tag,1));
2622                         $newtag = '#[url=' . DI::baseUrl() . '/search?tag=' . $basetag . ']' . $basetag . '[/url]';
2623
2624                         $item["body"] = str_replace($tag, $newtag, $item["body"]);
2625
2626                         if (!stristr($item["tag"], "/search?tag=" . $basetag . "]" . $basetag . "[/url]")) {
2627                                 if (strlen($item["tag"])) {
2628                                         $item["tag"] = ',' . $item["tag"];
2629                                 }
2630                                 $item["tag"] = $newtag . $item["tag"];
2631                         }
2632                 }
2633
2634                 // Convert back the masked hashtags
2635                 $item["body"] = str_replace("&num;", "#", $item["body"]);
2636
2637                 // Remember! What happens in [code], stays in [code]
2638                 // roleback the # and [
2639                 $item["body"] = preg_replace_callback("/\[code(.*?)\](.*?)\[\/code\]/ism",
2640                         function ($match) {
2641                                 // we truly unESCape all sharp and leftsquarebracket
2642                                 $find = [chr(27).'sharp', chr(27).'leftsquarebracket'];
2643                                 $replace = ['#', '['];
2644                                 return ("[code" . $match[1] . "]" . str_replace($find, $replace, $match[2]) . "[/code]");
2645                         }, $item["body"]);
2646         }
2647
2648         /**
2649          * look for mention tags and setup a second delivery chain for forum/community posts if appropriate
2650          *
2651          * @param int $uid
2652          * @param int $item_id
2653          * @return boolean true if item was deleted, else false
2654          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
2655          * @throws \ImagickException
2656          */
2657         private static function tagDeliver($uid, $item_id)
2658         {
2659                 $mention = false;
2660
2661                 $user = DBA::selectFirst('user', [], ['uid' => $uid]);
2662                 if (!DBA::isResult($user)) {
2663                         return false;
2664                 }
2665
2666                 $community_page = (($user['page-flags'] == User::PAGE_FLAGS_COMMUNITY) ? true : false);
2667                 $prvgroup = (($user['page-flags'] == User::PAGE_FLAGS_PRVGROUP) ? true : false);
2668
2669                 $item = self::selectFirst(self::ITEM_FIELDLIST, ['id' => $item_id]);
2670                 if (!DBA::isResult($item)) {
2671                         return false;
2672                 }
2673
2674                 $link = Strings::normaliseLink(DI::baseUrl() . '/profile/' . $user['nickname']);
2675
2676                 /*
2677                  * Diaspora uses their own hardwired link URL in @-tags
2678                  * instead of the one we supply with webfinger
2679                  */
2680                 $dlink = Strings::normaliseLink(DI::baseUrl() . '/u/' . $user['nickname']);
2681
2682                 $cnt = preg_match_all('/[\@\!]\[url\=(.*?)\](.*?)\[\/url\]/ism', $item['body'], $matches, PREG_SET_ORDER);
2683                 if ($cnt) {
2684                         foreach ($matches as $mtch) {
2685                                 if (Strings::compareLink($link, $mtch[1]) || Strings::compareLink($dlink, $mtch[1])) {
2686                                         $mention = true;
2687                                         Logger::log('mention found: ' . $mtch[2]);
2688                                 }
2689                         }
2690                 }
2691
2692                 if (!$mention) {
2693                         if (($community_page || $prvgroup) &&
2694                                   !$item['wall'] && !$item['origin'] && ($item['id'] == $item['parent'])) {
2695                                 // mmh.. no mention.. community page or private group... no wall.. no origin.. top-post (not a comment)
2696                                 // delete it!
2697                                 Logger::log("no-mention top-level post to community or private group. delete.");
2698                                 DBA::delete('item', ['id' => $item_id]);
2699                                 return true;
2700                         }
2701                         return false;
2702                 }
2703
2704                 $arr = ['item' => $item, 'user' => $user];
2705
2706                 Hook::callAll('tagged', $arr);
2707
2708                 if (!$community_page && !$prvgroup) {
2709                         return false;
2710                 }
2711
2712                 /*
2713                  * tgroup delivery - setup a second delivery chain
2714                  * prevent delivery looping - only proceed
2715                  * if the message originated elsewhere and is a top-level post
2716                  */
2717                 if ($item['wall'] || $item['origin'] || ($item['id'] != $item['parent'])) {
2718                         return false;
2719                 }
2720
2721                 // now change this copy of the post to a forum head message and deliver to all the tgroup members
2722                 $self = DBA::selectFirst('contact', ['id', 'name', 'url', 'thumb'], ['uid' => $uid, 'self' => true]);
2723                 if (!DBA::isResult($self)) {
2724                         return false;
2725                 }
2726
2727                 $owner_id = Contact::getIdForURL($self['url']);
2728
2729                 // also reset all the privacy bits to the forum default permissions
2730
2731                 $private = ($user['allow_cid'] || $user['allow_gid'] || $user['deny_cid'] || $user['deny_gid']) ? 1 : 0;
2732
2733                 $psid = PermissionSet::fetchIDForPost($user);
2734
2735                 $forum_mode = ($prvgroup ? 2 : 1);
2736
2737                 $fields = ['wall' => true, 'origin' => true, 'forum_mode' => $forum_mode, 'contact-id' => $self['id'],
2738                         'owner-id' => $owner_id, 'private' => $private, 'psid' => $psid];
2739                 self::update($fields, ['id' => $item_id]);
2740
2741                 self::updateThread($item_id);
2742
2743                 Worker::add(['priority' => PRIORITY_HIGH, 'dont_fork' => true], 'Notifier', Delivery::POST, $item_id);
2744
2745                 return false;
2746         }
2747
2748         public static function isRemoteSelf($contact, &$datarray)
2749         {
2750                 if (!$contact['remote_self']) {
2751                         return false;
2752                 }
2753
2754                 // Prevent the forwarding of posts that are forwarded
2755                 if (!empty($datarray["extid"]) && ($datarray["extid"] == Protocol::DFRN)) {
2756                         Logger::log('Already forwarded', Logger::DEBUG);
2757                         return false;
2758                 }
2759
2760                 // Prevent to forward already forwarded posts
2761                 if ($datarray["app"] == DI::baseUrl()->getHostname()) {
2762                         Logger::log('Already forwarded (second test)', Logger::DEBUG);
2763                         return false;
2764                 }
2765
2766                 // Only forward posts
2767                 if ($datarray["verb"] != Activity::POST) {
2768                         Logger::log('No post', Logger::DEBUG);
2769                         return false;
2770                 }
2771
2772                 if (($contact['network'] != Protocol::FEED) && $datarray['private']) {
2773                         Logger::log('Not public', Logger::DEBUG);
2774                         return false;
2775                 }
2776
2777                 $datarray2 = $datarray;
2778                 Logger::log('remote-self start - Contact '.$contact['url'].' - '.$contact['remote_self'].' Item '.print_r($datarray, true), Logger::DEBUG);
2779                 if ($contact['remote_self'] == 2) {
2780                         $self = DBA::selectFirst('contact', ['id', 'name', 'url', 'thumb'],
2781                                         ['uid' => $contact['uid'], 'self' => true]);
2782                         if (DBA::isResult($self)) {
2783                                 $datarray['contact-id'] = $self["id"];
2784
2785                                 $datarray['owner-name'] = $self["name"];
2786                                 $datarray['owner-link'] = $self["url"];
2787                                 $datarray['owner-avatar'] = $self["thumb"];
2788
2789                                 $datarray['author-name']   = $datarray['owner-name'];
2790                                 $datarray['author-link']   = $datarray['owner-link'];
2791                                 $datarray['author-avatar'] = $datarray['owner-avatar'];
2792
2793                                 unset($datarray['edited']);
2794
2795                                 unset($datarray['network']);
2796                                 unset($datarray['owner-id']);
2797                                 unset($datarray['author-id']);
2798                         }
2799
2800                         if ($contact['network'] != Protocol::FEED) {
2801                                 $datarray["guid"] = System::createUUID();
2802                                 unset($datarray["plink"]);
2803                                 $datarray["uri"] = self::newURI($contact['uid'], $datarray["guid"]);
2804                                 $datarray["parent-uri"] = $datarray["uri"];
2805                                 $datarray["thr-parent"] = $datarray["uri"];
2806                                 $datarray["extid"] = Protocol::DFRN;
2807                                 $urlpart = parse_url($datarray2['author-link']);
2808                                 $datarray["app"] = $urlpart["host"];
2809                         } else {
2810                                 $datarray['private'] = 0;
2811                         }
2812                 }
2813
2814                 if ($contact['network'] != Protocol::FEED) {
2815                         // Store the original post
2816                         $result = self::insert($datarray2, false, false);
2817                         Logger::log('remote-self post original item - Contact '.$contact['url'].' return '.$result.' Item '.print_r($datarray2, true), Logger::DEBUG);
2818                 } else {
2819                         $datarray["app"] = "Feed";
2820                         $result = true;
2821                 }
2822
2823                 // Trigger automatic reactions for addons
2824                 $datarray['api_source'] = true;
2825
2826                 // We have to tell the hooks who we are - this really should be improved
2827                 $_SESSION["authenticated"] = true;
2828                 $_SESSION["uid"] = $contact['uid'];
2829
2830                 return $result;
2831         }
2832
2833         /**
2834          *
2835          * @param string $s
2836          * @param int    $uid
2837          * @param array  $item
2838          * @param int    $cid
2839          * @return string
2840          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
2841          * @throws \ImagickException
2842          */
2843         public static function fixPrivatePhotos($s, $uid, $item = null, $cid = 0)
2844         {
2845                 if (Config::get('system', 'disable_embedded')) {
2846                         return $s;
2847                 }
2848
2849                 Logger::log('check for photos', Logger::DEBUG);
2850                 $site = substr(DI::baseUrl(), strpos(DI::baseUrl(), '://'));
2851
2852                 $orig_body = $s;
2853                 $new_body = '';
2854
2855                 $img_start = strpos($orig_body, '[img');
2856                 $img_st_close = ($img_start !== false ? strpos(substr($orig_body, $img_start), ']') : false);
2857                 $img_len = ($img_start !== false ? strpos(substr($orig_body, $img_start + $img_st_close + 1), '[/img]') : false);
2858
2859                 while (($img_st_close !== false) && ($img_len !== false)) {
2860                         $img_st_close++; // make it point to AFTER the closing bracket
2861                         $image = substr($orig_body, $img_start + $img_st_close, $img_len);
2862
2863                         Logger::log('found photo ' . $image, Logger::DEBUG);
2864
2865                         if (stristr($image, $site . '/photo/')) {
2866                                 // Only embed locally hosted photos
2867                                 $replace = false;
2868                                 $i = basename($image);
2869                                 $i = str_replace(['.jpg', '.png', '.gif'], ['', '', ''], $i);
2870                                 $x = strpos($i, '-');
2871
2872                                 if ($x) {
2873                                         $res = substr($i, $x + 1);
2874                                         $i = substr($i, 0, $x);
2875                                         $photo = Photo::getPhotoForUser($uid, $i, $res);
2876                                         if (DBA::isResult($photo)) {
2877                                                 /*
2878                                                  * Check to see if we should replace this photo link with an embedded image
2879                                                  * 1. No need to do so if the photo is public
2880                                                  * 2. If there's a contact-id provided, see if they're in the access list
2881                                                  *    for the photo. If so, embed it.
2882                                                  * 3. Otherwise, if we have an item, see if the item permissions match the photo
2883                                                  *    permissions, regardless of order but first check to see if they're an exact
2884                                                  *    match to save some processing overhead.
2885                                                  */
2886                                                 if (self::hasPermissions($photo)) {
2887                                                         if ($cid) {
2888                                                                 $recips = self::enumeratePermissions($photo);
2889                                                                 if (in_array($cid, $recips)) {
2890                                                                         $replace = true;
2891                                                                 }
2892                                                         } elseif ($item) {
2893                                                                 if (self::samePermissions($uid, $item, $photo)) {
2894                                                                         $replace = true;
2895                                                                 }
2896                                                         }
2897                                                 }
2898                                                 if ($replace) {
2899                                                         $photo_img = Photo::getImageForPhoto($photo);
2900                                                         // If a custom width and height were specified, apply before embedding
2901                                                         if (preg_match("/\[img\=([0-9]*)x([0-9]*)\]/is", substr($orig_body, $img_start, $img_st_close), $match)) {
2902                                                                 Logger::log('scaling photo', Logger::DEBUG);
2903
2904                                                                 $width = intval($match[1]);
2905                                                                 $height = intval($match[2]);
2906
2907                                                                 $photo_img->scaleDown(max($width, $height));
2908                                                         }
2909
2910                                                         $data = $photo_img->asString();
2911                                                         $type = $photo_img->getType();
2912
2913                                                         Logger::log('replacing photo', Logger::DEBUG);
2914                                                         $image = 'data:' . $type . ';base64,' . base64_encode($data);
2915                                                         Logger::log('replaced: ' . $image, Logger::DATA);
2916                                                 }
2917                                         }
2918                                 }
2919                         }
2920
2921                         $new_body = $new_body . substr($orig_body, 0, $img_start + $img_st_close) . $image . '[/img]';
2922                         $orig_body = substr($orig_body, $img_start + $img_st_close + $img_len + strlen('[/img]'));
2923                         if ($orig_body === false) {
2924                                 $orig_body = '';
2925                         }
2926
2927                         $img_start = strpos($orig_body, '[img');
2928                         $img_st_close = ($img_start !== false ? strpos(substr($orig_body, $img_start), ']') : false);
2929                         $img_len = ($img_start !== false ? strpos(substr($orig_body, $img_start + $img_st_close + 1), '[/img]') : false);
2930                 }
2931
2932                 $new_body = $new_body . $orig_body;
2933
2934                 return $new_body;
2935         }
2936
2937         private static function hasPermissions($obj)
2938         {
2939                 return !empty($obj['allow_cid']) || !empty($obj['allow_gid']) ||
2940                         !empty($obj['deny_cid']) || !empty($obj['deny_gid']);
2941         }
2942
2943         private static function samePermissions($uid, $obj1, $obj2)
2944         {
2945                 // first part is easy. Check that these are exactly the same.
2946                 if (($obj1['allow_cid'] == $obj2['allow_cid'])
2947                         && ($obj1['allow_gid'] == $obj2['allow_gid'])
2948                         && ($obj1['deny_cid'] == $obj2['deny_cid'])
2949                         && ($obj1['deny_gid'] == $obj2['deny_gid'])) {
2950                         return true;
2951                 }
2952
2953                 // This is harder. Parse all the permissions and compare the resulting set.
2954                 $recipients1 = self::enumeratePermissions($obj1);
2955                 $recipients2 = self::enumeratePermissions($obj2);
2956                 sort($recipients1);
2957                 sort($recipients2);
2958
2959                 /// @TODO Comparison of arrays, maybe use array_diff_assoc() here?
2960                 return ($recipients1 == $recipients2);
2961         }
2962
2963         /**
2964          * Returns an array of contact-ids that are allowed to see this object
2965          *
2966          * @param array $obj        Item array with at least uid, allow_cid, allow_gid, deny_cid and deny_gid
2967          * @param bool  $check_dead Prunes unavailable contacts from the result
2968          * @return array
2969          * @throws \Exception
2970          */
2971         public static function enumeratePermissions(array $obj, bool $check_dead = false)
2972         {
2973                 $aclFormater = DI::aclFormatter();
2974
2975                 $allow_people = $aclFormater->expand($obj['allow_cid']);
2976                 $allow_groups = Group::expand($obj['uid'], $aclFormater->expand($obj['allow_gid']), $check_dead);
2977                 $deny_people  = $aclFormater->expand($obj['deny_cid']);
2978                 $deny_groups  = Group::expand($obj['uid'], $aclFormater->expand($obj['deny_gid']), $check_dead);
2979                 $recipients   = array_unique(array_merge($allow_people, $allow_groups));
2980                 $deny         = array_unique(array_merge($deny_people, $deny_groups));
2981                 $recipients   = array_diff($recipients, $deny);
2982                 return $recipients;
2983         }
2984
2985         public static function getFeedTags($item)
2986         {
2987                 $ret = [];
2988                 $matches = false;
2989                 $cnt = preg_match_all('|\#\[url\=(.*?)\](.*?)\[\/url\]|', $item['tag'], $matches);
2990                 if ($cnt) {
2991                         for ($x = 0; $x < $cnt; $x ++) {
2992                                 if ($matches[1][$x]) {
2993                                         $ret[$matches[2][$x]] = ['#', $matches[1][$x], $matches[2][$x]];
2994                                 }
2995                         }
2996                 }
2997                 $matches = false;
2998                 $cnt = preg_match_all('|\@\[url\=(.*?)\](.*?)\[\/url\]|', $item['tag'], $matches);
2999                 if ($cnt) {
3000                         for ($x = 0; $x < $cnt; $x ++) {
3001                                 if ($matches[1][$x]) {
3002                                         $ret[] = ['@', $matches[1][$x], $matches[2][$x]];
3003                                 }
3004                         }
3005                 }
3006                 return $ret;
3007         }
3008
3009         public static function expire($uid, $days, $network = "", $force = false)
3010         {
3011                 if (!$uid || ($days < 1)) {
3012                         return;
3013                 }
3014
3015                 $condition = ["`uid` = ? AND NOT `deleted` AND `id` = `parent` AND `gravity` = ?",
3016                         $uid, GRAVITY_PARENT];
3017
3018                 /*
3019                  * $expire_network_only = save your own wall posts
3020                  * and just expire conversations started by others
3021                  */
3022                 $expire_network_only = DI::pConfig()->get($uid, 'expire', 'network_only', false);
3023
3024                 if ($expire_network_only) {
3025                         $condition[0] .= " AND NOT `wall`";
3026                 }
3027
3028                 if ($network != "") {
3029                         $condition[0] .= " AND `network` = ?";
3030                         $condition[] = $network;
3031                 }
3032
3033                 $condition[0] .= " AND `received` < UTC_TIMESTAMP() - INTERVAL ? DAY";
3034                 $condition[] = $days;
3035
3036                 $items = self::select(['file', 'resource-id', 'starred', 'type', 'id', 'post-type'], $condition);
3037
3038                 if (!DBA::isResult($items)) {
3039                         return;
3040                 }
3041
3042                 $expire_items = DI::pConfig()->get($uid, 'expire', 'items', true);
3043
3044                 // Forcing expiring of items - but not notes and marked items
3045                 if ($force) {
3046                         $expire_items = true;
3047                 }
3048
3049                 $expire_notes = DI::pConfig()->get($uid, 'expire', 'notes', true);
3050                 $expire_starred = DI::pConfig()->get($uid, 'expire', 'starred', true);
3051                 $expire_photos = DI::pConfig()->get($uid, 'expire', 'photos', false);
3052
3053                 $expired = 0;
3054
3055                 while ($item = Item::fetch($items)) {
3056                         // don't expire filed items
3057
3058                         if (strpos($item['file'], '[') !== false) {
3059                                 continue;
3060                         }
3061
3062                         // Only expire posts, not photos and photo comments
3063
3064                         if (!$expire_photos && strlen($item['resource-id'])) {
3065                                 continue;
3066                         } elseif (!$expire_starred && intval($item['starred'])) {
3067                                 continue;
3068                         } elseif (!$expire_notes && (($item['type'] == 'note') || ($item['post-type'] == Item::PT_PERSONAL_NOTE))) {
3069                                 continue;
3070                         } elseif (!$expire_items && ($item['type'] != 'note') && ($item['post-type'] != Item::PT_PERSONAL_NOTE)) {
3071                                 continue;
3072                         }
3073
3074                         self::deleteById($item['id'], PRIORITY_LOW);
3075
3076                         ++$expired;
3077                 }
3078                 DBA::close($items);
3079                 Logger::log('User ' . $uid . ": expired $expired items; expire items: $expire_items, expire notes: $expire_notes, expire starred: $expire_starred, expire photos: $expire_photos");
3080         }
3081
3082         public static function firstPostDate($uid, $wall = false)
3083         {
3084                 $condition = ['uid' => $uid, 'wall' => $wall, 'deleted' => false, 'visible' => true, 'moderated' => false];
3085                 $params = ['order' => ['received' => false]];
3086                 $thread = DBA::selectFirst('thread', ['received'], $condition, $params);
3087                 if (DBA::isResult($thread)) {
3088                         return substr(DateTimeFormat::local($thread['received']), 0, 10);
3089                 }
3090                 return false;
3091         }
3092
3093         /**
3094          * add/remove activity to an item
3095          *
3096          * Toggle activities as like,dislike,attend of an item
3097          *
3098          * @param string $item_id
3099          * @param string $verb
3100          *            Activity verb. One of
3101          *            like, unlike, dislike, undislike, attendyes, unattendyes,
3102          *            attendno, unattendno, attendmaybe, unattendmaybe
3103          * @return bool
3104          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
3105          * @throws \ImagickException
3106          * @hook  'post_local_end'
3107          *            array $arr
3108          *            'post_id' => ID of posted item
3109          */
3110         public static function performLike($item_id, $verb)
3111         {
3112                 if (!Session::isAuthenticated()) {
3113                         return false;
3114                 }
3115
3116                 switch ($verb) {
3117                         case 'like':
3118                         case 'unlike':
3119                                 $activity = Activity::LIKE;
3120                                 break;
3121                         case 'dislike':
3122                         case 'undislike':
3123                                 $activity = Activity::DISLIKE;
3124                                 break;
3125                         case 'attendyes':
3126                         case 'unattendyes':
3127                                 $activity = Activity::ATTEND;
3128                                 break;
3129                         case 'attendno':
3130                         case 'unattendno':
3131                                 $activity = Activity::ATTENDNO;
3132                                 break;
3133                         case 'attendmaybe':
3134                         case 'unattendmaybe':
3135                                 $activity = Activity::ATTENDMAYBE;
3136                                 break;
3137                         default:
3138                                 Logger::log('like: unknown verb ' . $verb . ' for item ' . $item_id);
3139                                 return false;
3140                 }
3141
3142                 // Enable activity toggling instead of on/off
3143                 $event_verb_flag = $activity === Activity::ATTEND || $activity === Activity::ATTENDNO || $activity === Activity::ATTENDMAYBE;
3144
3145                 Logger::log('like: verb ' . $verb . ' item ' . $item_id);
3146
3147                 $item = self::selectFirst(self::ITEM_FIELDLIST, ['`id` = ? OR `uri` = ?', $item_id, $item_id]);
3148                 if (!DBA::isResult($item)) {
3149                         Logger::log('like: unknown item ' . $item_id);
3150                         return false;
3151                 }
3152
3153                 $item_uri = $item['uri'];
3154
3155                 $uid = $item['uid'];
3156                 if (($uid == 0) && local_user()) {
3157                         $uid = local_user();
3158                 }
3159
3160                 if (!Security::canWriteToUserWall($uid)) {
3161                         Logger::log('like: unable to write on wall ' . $uid);
3162                         return false;
3163                 }
3164
3165                 // Retrieves the local post owner
3166                 $owner_self_contact = DBA::selectFirst('contact', [], ['uid' => $uid, 'self' => true]);
3167                 if (!DBA::isResult($owner_self_contact)) {
3168                         Logger::log('like: unknown owner ' . $uid);
3169                         return false;
3170                 }
3171
3172                 // Retrieve the current logged in user's public contact
3173                 $author_id = public_contact();
3174
3175                 $author_contact = DBA::selectFirst('contact', ['url'], ['id' => $author_id]);
3176                 if (!DBA::isResult($author_contact)) {
3177                         Logger::log('like: unknown author ' . $author_id);
3178                         return false;
3179                 }
3180
3181                 // Contact-id is the uid-dependant author contact
3182                 if (local_user() == $uid) {
3183                         $item_contact_id = $owner_self_contact['id'];
3184                 } else {
3185                         $item_contact_id = Contact::getIdForURL($author_contact['url'], $uid, true);
3186                         $item_contact = DBA::selectFirst('contact', [], ['id' => $item_contact_id]);
3187                         if (!DBA::isResult($item_contact)) {
3188                                 Logger::log('like: unknown item contact ' . $item_contact_id);
3189                                 return false;
3190                         }
3191                 }
3192
3193                 // Look for an existing verb row
3194                 // event participation are essentially radio toggles. If you make a subsequent choice,
3195                 // we need to eradicate your first choice.
3196                 if ($event_verb_flag) {
3197                         $verbs = [Activity::ATTEND, Activity::ATTENDNO, Activity::ATTENDMAYBE];
3198
3199                         // Translate to the index based activity index
3200                         $activities = [];
3201                         foreach ($verbs as $verb) {
3202                                 $activities[] = self::activityToIndex($verb);
3203                         }
3204                 } else {
3205                         $activities = self::activityToIndex($activity);
3206                 }
3207
3208                 $condition = ['activity' => $activities, 'deleted' => false, 'gravity' => GRAVITY_ACTIVITY,
3209                         'author-id' => $author_id, 'uid' => $item['uid'], 'thr-parent' => $item_uri];
3210
3211                 $like_item = self::selectFirst(['id', 'guid', 'verb'], $condition);
3212
3213                 // If it exists, mark it as deleted
3214                 if (DBA::isResult($like_item)) {
3215                         self::deleteById($like_item['id']);
3216
3217                         if (!$event_verb_flag || $like_item['verb'] == $activity) {
3218                                 return true;
3219                         }
3220                 }
3221
3222                 // Verb is "un-something", just trying to delete existing entries
3223                 if (strpos($verb, 'un') === 0) {
3224                         return true;
3225                 }
3226
3227                 $objtype = $item['resource-id'] ? Activity\ObjectType::IMAGE : Activity\ObjectType::NOTE;
3228
3229                 $new_item = [
3230                         'guid'          => System::createUUID(),
3231                         'uri'           => self::newURI($item['uid']),
3232                         'uid'           => $item['uid'],
3233                         'contact-id'    => $item_contact_id,
3234                         'wall'          => $item['wall'],
3235                         'origin'        => 1,
3236                         'network'       => Protocol::DFRN,
3237                         'gravity'       => GRAVITY_ACTIVITY,
3238                         'parent'        => $item['id'],
3239                         'parent-uri'    => $item['uri'],
3240                         'thr-parent'    => $item['uri'],
3241                         'owner-id'      => $author_id,
3242                         'author-id'     => $author_id,
3243                         'body'          => $activity,
3244                         'verb'          => $activity,
3245                         'object-type'   => $objtype,
3246                         'allow_cid'     => $item['allow_cid'],
3247                         'allow_gid'     => $item['allow_gid'],
3248                         'deny_cid'      => $item['deny_cid'],
3249                         'deny_gid'      => $item['deny_gid'],
3250                         'visible'       => 1,
3251                         'unseen'        => 1,
3252                 ];
3253
3254                 $signed = Diaspora::createLikeSignature($uid, $new_item);
3255                 if (!empty($signed)) {
3256                         $new_item['diaspora_signed_text'] = json_encode($signed);
3257                 }
3258
3259                 $new_item_id = self::insert($new_item);
3260
3261                 // If the parent item isn't visible then set it to visible
3262                 if (!$item['visible']) {
3263                         self::update(['visible' => true], ['id' => $item['id']]);
3264                 }
3265
3266                 $new_item['id'] = $new_item_id;
3267
3268                 Hook::callAll('post_local_end', $new_item);
3269
3270                 return true;
3271         }
3272
3273         private static function addThread($itemid, $onlyshadow = false)
3274         {
3275                 $fields = ['uid', 'created', 'edited', 'commented', 'received', 'changed', 'wall', 'private', 'pubmail',
3276                         'moderated', 'visible', 'starred', 'contact-id', 'post-type',
3277                         'deleted', 'origin', 'forum_mode', 'mention', 'network', 'author-id', 'owner-id'];
3278                 $condition = ["`id` = ? AND (`parent` = ? OR `parent` = 0)", $itemid, $itemid];
3279                 $item = self::selectFirst($fields, $condition);
3280
3281                 if (!DBA::isResult($item)) {
3282                         return;
3283                 }
3284
3285                 $item['iid'] = $itemid;
3286
3287                 if (!$onlyshadow) {
3288                         $result = DBA::insert('thread', $item);
3289
3290                         Logger::log("Add thread for item ".$itemid." - ".print_r($result, true), Logger::DEBUG);
3291                 }
3292         }
3293
3294         private static function updateThread($itemid, $setmention = false)
3295         {
3296                 $fields = ['uid', 'guid', 'created', 'edited', 'commented', 'received', 'changed', 'post-type',
3297                         'wall', 'private', 'pubmail', 'moderated', 'visible', 'starred', 'contact-id',
3298                         'deleted', 'origin', 'forum_mode', 'network', 'author-id', 'owner-id'];
3299                 $condition = ["`id` = ? AND (`parent` = ? OR `parent` = 0)", $itemid, $itemid];
3300
3301                 $item = self::selectFirst($fields, $condition);
3302                 if (!DBA::isResult($item)) {
3303                         return;
3304                 }
3305
3306                 if ($setmention) {
3307                         $item["mention"] = 1;
3308                 }
3309
3310                 $fields = [];
3311
3312                 foreach ($item as $field => $data) {
3313                         if (!in_array($field, ["guid"])) {
3314                                 $fields[$field] = $data;
3315                         }
3316                 }
3317
3318                 $result = DBA::update('thread', $fields, ['iid' => $itemid]);
3319
3320                 Logger::log("Update thread for item ".$itemid." - guid ".$item["guid"]." - ".(int)$result, Logger::DEBUG);
3321         }
3322
3323         private static function deleteThread($itemid, $itemuri = "")
3324         {
3325                 $item = DBA::selectFirst('thread', ['uid'], ['iid' => $itemid]);
3326                 if (!DBA::isResult($item)) {
3327                         Logger::log('No thread found for id '.$itemid, Logger::DEBUG);
3328                         return;
3329                 }
3330
3331                 $result = DBA::delete('thread', ['iid' => $itemid], ['cascade' => false]);
3332
3333                 Logger::log("deleteThread: Deleted thread for item ".$itemid." - ".print_r($result, true), Logger::DEBUG);
3334
3335                 if ($itemuri != "") {
3336                         $condition = ["`uri` = ? AND NOT `deleted` AND NOT (`uid` IN (?, 0))", $itemuri, $item["uid"]];
3337                         if (!self::exists($condition)) {
3338                                 DBA::delete('item', ['uri' => $itemuri, 'uid' => 0]);
3339                                 Logger::log("deleteThread: Deleted shadow for item ".$itemuri, Logger::DEBUG);
3340                         }
3341                 }
3342         }
3343
3344         public static function getPermissionsSQLByUserId($owner_id)
3345         {
3346                 $local_user = local_user();
3347                 $remote_user = Session::getRemoteContactID($owner_id);
3348
3349                 /*
3350                  * Construct permissions
3351                  *
3352                  * default permissions - anonymous user
3353                  */
3354                 $sql = " AND NOT `item`.`private`";
3355
3356                 // Profile owner - everything is visible
3357                 if ($local_user && ($local_user == $owner_id)) {
3358                         $sql = '';
3359                 } elseif ($remote_user) {
3360                         /*
3361                          * Authenticated visitor. Unless pre-verified,
3362                          * check that the contact belongs to this $owner_id
3363                          * and load the groups the visitor belongs to.
3364                          * If pre-verified, the caller is expected to have already
3365                          * done this and passed the groups into this function.
3366                          */
3367                         $set = PermissionSet::get($owner_id, $remote_user);
3368
3369                         if (!empty($set)) {
3370                                 $sql_set = " OR (`item`.`private` IN (1,2) AND `item`.`wall` AND `item`.`psid` IN (" . implode(',', $set) . "))";
3371                         } else {
3372                                 $sql_set = '';
3373                         }
3374
3375                         $sql = " AND (NOT `item`.`private`" . $sql_set . ")";
3376                 }
3377
3378                 return $sql;
3379         }
3380
3381         /**
3382          * get translated item type
3383          *
3384          * @param $item
3385          * @return string
3386          */
3387         public static function postType($item)
3388         {
3389                 if (!empty($item['event-id'])) {
3390                         return DI::l10n()->t('event');
3391                 } elseif (!empty($item['resource-id'])) {
3392                         return DI::l10n()->t('photo');
3393                 } elseif (!empty($item['verb']) && $item['verb'] !== Activity::POST) {
3394                         return DI::l10n()->t('activity');
3395                 } elseif ($item['id'] != $item['parent']) {
3396                         return DI::l10n()->t('comment');
3397                 }
3398
3399                 return DI::l10n()->t('post');
3400         }
3401
3402         /**
3403          * Sets the "rendered-html" field of the provided item
3404          *
3405          * Body is preserved to avoid side-effects as we modify it just-in-time for spoilers and private image links
3406          *
3407          * @param array $item
3408          * @param bool  $update
3409          *
3410          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
3411          * @todo Remove reference, simply return "rendered-html" and "rendered-hash"
3412          */
3413         public static function putInCache(&$item, $update = false)
3414         {
3415                 $body = $item["body"];
3416
3417                 $rendered_hash = $item['rendered-hash'] ?? '';
3418                 $rendered_html = $item['rendered-html'] ?? '';
3419
3420                 if ($rendered_hash == ''
3421                         || $rendered_html == ""
3422                         || $rendered_hash != hash("md5", $item["body"])
3423                         || Config::get("system", "ignore_cache")
3424                 ) {
3425                         self::addRedirToImageTags($item);
3426
3427                         $item["rendered-html"] = BBCode::convert($item["body"]);
3428                         $item["rendered-hash"] = hash("md5", $item["body"]);
3429
3430                         $hook_data = ['item' => $item, 'rendered-html' => $item['rendered-html'], 'rendered-hash' => $item['rendered-hash']];
3431                         Hook::callAll('put_item_in_cache', $hook_data);
3432                         $item['rendered-html'] = $hook_data['rendered-html'];
3433                         $item['rendered-hash'] = $hook_data['rendered-hash'];
3434                         unset($hook_data);
3435
3436                         // Force an update if the generated values differ from the existing ones
3437                         if ($rendered_hash != $item["rendered-hash"]) {
3438                                 $update = true;
3439                         }
3440
3441                         // Only compare the HTML when we forcefully ignore the cache
3442                         if (Config::get("system", "ignore_cache") && ($rendered_html != $item["rendered-html"])) {
3443                                 $update = true;
3444                         }
3445
3446                         if ($update && !empty($item["id"])) {
3447                                 self::update(
3448                                         [
3449                                                 'rendered-html' => $item["rendered-html"],
3450                                                 'rendered-hash' => $item["rendered-hash"]
3451                                         ],
3452                                         ['id' => $item["id"]]
3453                                 );
3454                         }
3455                 }
3456
3457                 $item["body"] = $body;
3458         }
3459
3460         /**
3461          * Find any non-embedded images in private items and add redir links to them
3462          *
3463          * @param array &$item The field array of an item row
3464          */
3465         private static function addRedirToImageTags(array &$item)
3466         {
3467                 $app = DI::app();
3468
3469                 $matches = [];
3470                 $cnt = preg_match_all('|\[img\](http[^\[]*?/photo/[a-fA-F0-9]+?(-[0-9]\.[\w]+?)?)\[\/img\]|', $item['body'], $matches, PREG_SET_ORDER);
3471                 if ($cnt) {
3472                         foreach ($matches as $mtch) {
3473                                 if (strpos($mtch[1], '/redir') !== false) {
3474                                         continue;
3475                                 }
3476
3477                                 if ((local_user() == $item['uid']) && ($item['private'] == 1) && ($item['contact-id'] != $app->contact['id']) && ($item['network'] == Protocol::DFRN)) {
3478                                         $img_url = 'redir/' . $item['contact-id'] . '?url=' . urlencode($mtch[1]);
3479                                         $item['body'] = str_replace($mtch[0], '[img]' . $img_url . '[/img]', $item['body']);
3480                                 }
3481                         }
3482                 }
3483         }
3484
3485         /**
3486          * Given an item array, convert the body element from bbcode to html and add smilie icons.
3487          * If attach is true, also add icons for item attachments.
3488          *
3489          * @param array   $item
3490          * @param boolean $attach
3491          * @param boolean $is_preview
3492          * @return string item body html
3493          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
3494          * @throws \ImagickException
3495          * @hook  prepare_body_init item array before any work
3496          * @hook  prepare_body_content_filter ('item'=>item array, 'filter_reasons'=>string array) before first bbcode to html
3497          * @hook  prepare_body ('item'=>item array, 'html'=>body string, 'is_preview'=>boolean, 'filter_reasons'=>string array) after first bbcode to html
3498          * @hook  prepare_body_final ('item'=>item array, 'html'=>body string) after attach icons and blockquote special case handling (spoiler, author)
3499          */
3500         public static function prepareBody(array &$item, $attach = false, $is_preview = false)
3501         {
3502                 $a = DI::app();
3503                 Hook::callAll('prepare_body_init', $item);
3504
3505                 // In order to provide theme developers more possibilities, event items
3506                 // are treated differently.
3507                 if ($item['object-type'] === Activity\ObjectType::EVENT && isset($item['event-id'])) {
3508                         $ev = Event::getItemHTML($item);
3509                         return $ev;
3510                 }
3511
3512                 $tags = Term::populateTagsFromItem($item);
3513
3514                 $item['tags'] = $tags['tags'];
3515                 $item['hashtags'] = $tags['hashtags'];
3516                 $item['mentions'] = $tags['mentions'];
3517
3518                 // Compile eventual content filter reasons
3519                 $filter_reasons = [];
3520                 if (!$is_preview && public_contact() != $item['author-id']) {
3521                         if (!empty($item['content-warning']) && (!local_user() || !DI::pConfig()->get(local_user(), 'system', 'disable_cw', false))) {
3522                                 $filter_reasons[] = DI::l10n()->t('Content warning: %s', $item['content-warning']);
3523                         }
3524
3525                         $hook_data = [
3526                                 'item' => $item,
3527                                 'filter_reasons' => $filter_reasons
3528                         ];
3529                         Hook::callAll('prepare_body_content_filter', $hook_data);
3530                         $filter_reasons = $hook_data['filter_reasons'];
3531                         unset($hook_data);
3532                 }
3533
3534                 // Update the cached values if there is no "zrl=..." on the links.
3535                 $update = (!Session::isAuthenticated() && ($item["uid"] == 0));
3536
3537                 // Or update it if the current viewer is the intented viewer.
3538                 if (($item["uid"] == local_user()) && ($item["uid"] != 0)) {
3539                         $update = true;
3540                 }
3541
3542                 self::putInCache($item, $update);
3543                 $s = $item["rendered-html"];
3544
3545                 $hook_data = [
3546                         'item' => $item,
3547                         'html' => $s,
3548                         'preview' => $is_preview,
3549                         'filter_reasons' => $filter_reasons
3550                 ];
3551                 Hook::callAll('prepare_body', $hook_data);
3552                 $s = $hook_data['html'];
3553                 unset($hook_data);
3554
3555                 if (!$attach) {
3556                         // Replace the blockquotes with quotes that are used in mails.
3557                         $mailquote = '<blockquote type="cite" class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">';
3558                         $s = str_replace(['<blockquote>', '<blockquote class="spoiler">', '<blockquote class="author">'], [$mailquote, $mailquote, $mailquote], $s);
3559                         return $s;
3560                 }
3561
3562                 $as = '';
3563                 $vhead = false;
3564                 $matches = [];
3565                 preg_match_all('|\[attach\]href=\"(.*?)\" length=\"(.*?)\" type=\"(.*?)\"(?: title=\"(.*?)\")?|', $item['attach'], $matches, PREG_SET_ORDER);
3566                 foreach ($matches as $mtch) {
3567                         $mime = $mtch[3];
3568
3569                         $the_url = Contact::magicLinkById($item['author-id'], $mtch[1]);
3570
3571                         if (strpos($mime, 'video') !== false) {
3572                                 if (!$vhead) {
3573                                         $vhead = true;
3574                                         DI::page()['htmlhead'] .= Renderer::replaceMacros(Renderer::getMarkupTemplate('videos_head.tpl'));
3575                                 }
3576
3577                                 $url_parts = explode('/', $the_url);
3578                                 $id = end($url_parts);
3579                                 $as .= Renderer::replaceMacros(Renderer::getMarkupTemplate('video_top.tpl'), [
3580                                         '$video' => [
3581                                                 'id'     => $id,
3582                                                 'title'  => DI::l10n()->t('View Video'),
3583                                                 'src'    => $the_url,
3584                                                 'mime'   => $mime,
3585                                         ],
3586                                 ]);
3587                         }
3588
3589                         $filetype = strtolower(substr($mime, 0, strpos($mime, '/')));
3590                         if ($filetype) {
3591                                 $filesubtype = strtolower(substr($mime, strpos($mime, '/') + 1));
3592                                 $filesubtype = str_replace('.', '-', $filesubtype);
3593                         } else {
3594                                 $filetype = 'unkn';
3595                                 $filesubtype = 'unkn';
3596                         }
3597
3598                         $title = Strings::escapeHtml(trim(($mtch[4] ?? '') ?: $mtch[1]));
3599                         $title .= ' ' . $mtch[2] . ' ' . DI::l10n()->t('bytes');
3600
3601                         $icon = '<div class="attachtype icon s22 type-' . $filetype . ' subtype-' . $filesubtype . '"></div>';
3602                         $as .= '<a href="' . strip_tags($the_url) . '" title="' . $title . '" class="attachlink" target="_blank" >' . $icon . '</a>';
3603                 }
3604
3605                 if ($as != '') {
3606                         $s .= '<div class="body-attach">'.$as.'<div class="clear"></div></div>';
3607                 }
3608
3609                 // Map.
3610                 if (strpos($s, '<div class="map">') !== false && !empty($item['coord'])) {
3611                         $x = Map::byCoordinates(trim($item['coord']));
3612                         if ($x) {
3613                                 $s = preg_replace('/\<div class\=\"map\"\>/', '$0' . $x, $s);
3614                         }
3615                 }
3616
3617                 // Replace friendica image url size with theme preference.
3618                 if (!empty($a->theme_info['item_image_size'])) {
3619                         $ps = $a->theme_info['item_image_size'];
3620                         $s = preg_replace('|(<img[^>]+src="[^"]+/photo/[0-9a-f]+)-[0-9]|', "$1-" . $ps, $s);
3621                 }
3622
3623                 $s = HTML::applyContentFilter($s, $filter_reasons);
3624
3625                 $hook_data = ['item' => $item, 'html' => $s];
3626                 Hook::callAll('prepare_body_final', $hook_data);
3627
3628                 return $hook_data['html'];
3629         }
3630
3631         /**
3632          * get private link for item
3633          *
3634          * @param array $item
3635          * @return boolean|array False if item has not plink, otherwise array('href'=>plink url, 'title'=>translated title)
3636          * @throws \Exception
3637          */
3638         public static function getPlink($item)
3639         {
3640                 $a = DI::app();
3641
3642                 if ($a->user['nickname'] != "") {
3643                         $ret = [
3644                                 'href' => "display/" . $item['guid'],
3645                                 'orig' => "display/" . $item['guid'],
3646                                 'title' => DI::l10n()->t('View on separate page'),
3647                                 'orig_title' => DI::l10n()->t('view on separate page'),
3648                         ];
3649
3650                         if (!empty($item['plink'])) {
3651                                 $ret["href"] = DI::baseUrl()->remove($item['plink']);
3652                                 $ret["title"] = DI::l10n()->t('link to source');
3653                         }
3654
3655                 } elseif (!empty($item['plink']) && ($item['private'] != 1)) {
3656                         $ret = [
3657                                 'href' => $item['plink'],
3658                                 'orig' => $item['plink'],
3659                                 'title' => DI::l10n()->t('link to source'),
3660                         ];
3661                 } else {
3662                         $ret = [];
3663                 }
3664
3665                 return $ret;
3666         }
3667
3668         /**
3669          * Is the given item array a post that is sent as starting post to a forum?
3670          *
3671          * @param array $item
3672          * @param array $owner
3673          *
3674          * @return boolean "true" when it is a forum post
3675          */
3676         public static function isForumPost(array $item, array $owner = [])
3677         {
3678                 if (empty($owner)) {
3679                         $owner = User::getOwnerDataById($item['uid']);
3680                         if (empty($owner)) {
3681                                 return false;
3682                         }
3683                 }
3684
3685                 if (($item['author-id'] == $item['owner-id']) ||
3686                         ($owner['id'] == $item['contact-id']) ||
3687                         ($item['uri'] != $item['parent-uri']) ||
3688                         $item['origin']) {
3689                         return false;
3690                 }
3691
3692                 return Contact::isForum($item['contact-id']);
3693         }
3694
3695         /**
3696          * Search item id for given URI or plink
3697          *
3698          * @param string $uri
3699          * @param integer $uid
3700          *
3701          * @return integer item id
3702          */
3703         public static function searchByLink($uri, $uid = 0)
3704         {
3705                 $ssl_uri = str_replace('http://', 'https://', $uri);
3706                 $uris = [$uri, $ssl_uri, Strings::normaliseLink($uri)];
3707
3708                 $item = DBA::selectFirst('item', ['id'], ['uri' => $uris, 'uid' => $uid]);
3709                 if (DBA::isResult($item)) {
3710                         return $item['id'];
3711                 }
3712
3713                 $itemcontent = DBA::selectFirst('item-content', ['uri-id'], ['plink' => $uris]);
3714                 if (!DBA::isResult($itemcontent)) {
3715                         return 0;
3716                 }
3717
3718                 $itemuri = DBA::selectFirst('item-uri', ['uri'], ['id' => $itemcontent['uri-id']]);
3719                 if (!DBA::isResult($itemuri)) {
3720                         return 0;
3721                 }
3722
3723                 $item = DBA::selectFirst('item', ['id'], ['uri' => $itemuri['uri'], 'uid' => $uid]);
3724                 if (DBA::isResult($item)) {
3725                         return $item['id'];
3726                 }
3727
3728                 return 0;
3729         }
3730
3731         /**
3732          * Fetches item for given URI or plink
3733          *
3734          * @param string $uri
3735          * @param integer $uid
3736          *
3737          * @return integer item id
3738          */
3739         public static function fetchByLink($uri, $uid = 0)
3740         {
3741                 $item_id = self::searchByLink($uri, $uid);
3742                 if (!empty($item_id)) {
3743                         return $item_id;
3744                 }
3745
3746                 if (ActivityPub\Processor::fetchMissingActivity($uri)) {
3747                         $item_id = self::searchByLink($uri, $uid);
3748                 } else {
3749                         $item_id = Diaspora::fetchByURL($uri);
3750                 }
3751
3752                 if (!empty($item_id)) {
3753                         return $item_id;
3754                 }
3755
3756                 return 0;
3757         }
3758
3759         /**
3760          * Return share data from an item array (if the item is shared item)
3761          * We are providing the complete Item array, because at some time in the future
3762          * we hopefully will define these values not in the body anymore but in some item fields.
3763          * This function is meant to replace all similar functions in the system.
3764          *
3765          * @param array $item
3766          *
3767          * @return array with share information
3768          */
3769         public static function getShareArray($item)
3770         {
3771                 if (!preg_match("/(.*?)\[share(.*?)\]\s?(.*?)\s?\[\/share\]\s?/ism", $item['body'], $matches)) {
3772                         return [];
3773                 }
3774
3775                 $attribute_string = $matches[2];
3776                 $attributes = ['comment' => trim($matches[1]), 'shared' => trim($matches[3])];
3777                 foreach (['author', 'profile', 'avatar', 'guid', 'posted', 'link'] as $field) {
3778                         if (preg_match("/$field=(['\"])(.+?)\\1/ism", $attribute_string, $matches)) {
3779                                 $attributes[$field] = trim(html_entity_decode($matches[2] ?? '', ENT_QUOTES, 'UTF-8'));
3780                         }
3781                 }
3782                 return $attributes;
3783         }
3784
3785         /**
3786          * Fetch item information for shared items from the original items and adds it.
3787          *
3788          * @param array $item
3789          *
3790          * @return array item array with data from the original item
3791          */
3792         public static function addShareDataFromOriginal($item)
3793         {
3794                 $shared = self::getShareArray($item);
3795                 if (empty($shared)) {
3796                         return $item;
3797                 }
3798
3799                 // Real reshares always have got a GUID.
3800                 if (empty($shared['guid'])) {
3801                         return $item;
3802                 }
3803
3804                 $uid = $item['uid'] ?? 0;
3805
3806                 // first try to fetch the item via the GUID. This will work for all reshares that had been created on this system
3807                 $shared_item = self::selectFirst(['title', 'body', 'attach'], ['guid' => $shared['guid'], 'uid' => [0, $uid]]);
3808                 if (!DBA::isResult($shared_item)) {
3809                         // Otherwhise try to find (and possibly fetch) the item via the link. This should work for Diaspora and ActivityPub posts
3810                         $id = self::fetchByLink($shared['link'], $uid);
3811                         if (empty($id)) {
3812                                 Logger::info('Original item not found', ['url' => $shared['link'], 'callstack' => System::callstack()]);
3813                                 return $item;
3814                         }
3815
3816                         $shared_item = self::selectFirst(['title', 'body', 'attach'], ['id' => $id]);
3817                         if (!DBA::isResult($shared_item)) {
3818                                 return $item;
3819                         }
3820                         Logger::info('Got shared data from url', ['url' => $shared['link'], 'callstack' => System::callstack()]);
3821                 } else {
3822                         Logger::info('Got shared data from guid', ['guid' => $shared['guid'], 'callstack' => System::callstack()]);
3823                 }
3824
3825                 if (!empty($shared_item['title'])) {
3826                         $body = '[h3]' . $shared_item['title'] . "[/h3]\n" . $shared_item['body'];
3827                         unset($shared_item['title']);
3828                 } else {
3829                         $body = $shared_item['body'];
3830                 }
3831
3832                 $item['body'] = preg_replace("/\[share ([^\[\]]*)\].*\[\/share\]/ism", '[share $1]' . $body . '[/share]', $item['body']);
3833                 unset($shared_item['body']);
3834
3835                 return array_merge($item, $shared_item);
3836         }
3837 }