src/Model/Item.php

   1 <?php
   2
   3 /**
   4  * @file src/Model/Item.php
   5  */
   6
   7 namespace Friendica\Model;
   8
   9 use Friendica\Content\Text\BBCode;
  10 use Friendica\Content\Text\HTML;
  11 use Friendica\Core\Config;
  12 use Friendica\Core\Hook;
  13 use Friendica\Core\L10n;
  14 use Friendica\Core\Lock;
  15 use Friendica\Core\Logger;
  16 use Friendica\Core\PConfig;
  17 use Friendica\Core\Protocol;
  18 use Friendica\Core\Renderer;
  19 use Friendica\Core\Session;
  20 use Friendica\Core\System;
  21 use Friendica\Core\Worker;
  22 use Friendica\Database\DBA;
  23 use Friendica\DI;
  24 use Friendica\Protocol\Activity;
  25 use Friendica\Protocol\ActivityPub;
  26 use Friendica\Protocol\Diaspora;
  27 use Friendica\Protocol\OStatus;
  28 use Friendica\Util\DateTimeFormat;
  29 use Friendica\Util\Map;
  30 use Friendica\Util\Network;
  31 use Friendica\Util\Security;
  32 use Friendica\Util\Strings;
  33 use Friendica\Util\XML;
  34 use Friendica\Worker\Delivery;
  35 use Text_LanguageDetect;
  36
  37 class Item
  38 {
  39         // Posting types, inspired by https://www.w3.org/TR/activitystreams-vocabulary/#object-types
  40         const PT_ARTICLE = 0;
  41         const PT_NOTE = 1;
  42         const PT_PAGE = 2;
  43         const PT_IMAGE = 16;
  44         const PT_AUDIO = 17;
  45         const PT_VIDEO = 18;
  46         const PT_DOCUMENT = 19;
  47         const PT_EVENT = 32;
  48         const PT_PERSONAL_NOTE = 128;
  49
  50         // Field list that is used to display the items
  51         const DISPLAY_FIELDLIST = [
  52                 'uid', 'id', 'parent', 'uri', 'thr-parent', 'parent-uri', 'guid', 'network', 'gravity',
  53                 'commented', 'created', 'edited', 'received', 'verb', 'object-type', 'postopts', 'plink',
  54                 'wall', 'private', 'starred', 'origin', 'title', 'body', 'file', 'attach', 'language',
  55                 'content-warning', 'location', 'coord', 'app', 'rendered-hash', 'rendered-html', 'object',
  56                 'allow_cid', 'allow_gid', 'deny_cid', 'deny_gid', 'item_id',
  57                 'author-id', 'author-link', 'author-name', 'author-avatar', 'author-network',
  58                 'owner-id', 'owner-link', 'owner-name', 'owner-avatar', 'owner-network',
  59                 'contact-id', 'contact-uid', 'contact-link', 'contact-name', 'contact-avatar',
  60                 'writable', 'self', 'cid', 'alias', 'pinned',
  61                 'event-id', 'event-created', 'event-edited', 'event-start', 'event-finish',
  62                 'event-summary', 'event-desc', 'event-location', 'event-type',
  63                 'event-nofinish', 'event-adjust', 'event-ignore', 'event-id',
  64                 'delivery_queue_count', 'delivery_queue_done', 'delivery_queue_failed'
  65         ];
  66
  67         // Field list that is used to deliver items via the protocols
  68         const DELIVER_FIELDLIST = ['uid', 'id', 'parent', 'uri', 'thr-parent', 'parent-uri', 'guid',
  69                         'parent-guid', 'created', 'edited', 'verb', 'object-type', 'object', 'target',
  70                         'private', 'title', 'body', 'location', 'coord', 'app',
  71                         'attach', 'tag', 'deleted', 'extid', 'post-type',
  72                         'allow_cid', 'allow_gid', 'deny_cid', 'deny_gid',
  73                         'author-id', 'author-link', 'owner-link', 'contact-uid',
  74                         'signed_text', 'signature', 'signer', 'network'];
  75
  76         // Field list for "item-content" table that is mixed with the item table
  77         const MIXED_CONTENT_FIELDLIST = ['title', 'content-warning', 'body', 'location',
  78                         'coord', 'app', 'rendered-hash', 'rendered-html', 'verb',
  79                         'object-type', 'object', 'target-type', 'target', 'plink'];
  80
  81         // Field list for "item-content" table that is not present in the "item" table
  82         const CONTENT_FIELDLIST = ['language'];
  83
  84         // All fields in the item table
  85         const ITEM_FIELDLIST = ['id', 'uid', 'parent', 'uri', 'parent-uri', 'thr-parent', 'guid',
  86                         'contact-id', 'type', 'wall', 'gravity', 'extid', 'icid', 'iaid', 'psid',
  87                         'created', 'edited', 'commented', 'received', 'changed', 'verb',
  88                         'postopts', 'plink', 'resource-id', 'event-id', 'tag', 'attach', 'inform',
  89                         'file', 'allow_cid', 'allow_gid', 'deny_cid', 'deny_gid', 'post-type',
  90                         'private', 'pubmail', 'moderated', 'visible', 'starred', 'bookmark',
  91                         'unseen', 'deleted', 'origin', 'forum_mode', 'mention', 'global', 'network',
  92                         'title', 'content-warning', 'body', 'location', 'coord', 'app',
  93                         'rendered-hash', 'rendered-html', 'object-type', 'object', 'target-type', 'target',
  94                         'author-id', 'author-link', 'author-name', 'author-avatar', 'author-network',
  95                         'owner-id', 'owner-link', 'owner-name', 'owner-avatar'];
  96
  97         // Never reorder or remove entries from this list. Just add new ones at the end, if needed.
  98         // The item-activity table only stores the index and needs this array to know the matching activity.
  99         const ACTIVITIES = [
 100                 Activity::LIKE, Activity::DISLIKE,
 101                 Activity::ATTEND, Activity::ATTENDNO, Activity::ATTENDMAYBE,
 102                 Activity::FOLLOW,
 103                 Activity::ANNOUNCE];
 104
 105         private static $legacy_mode = null;
 106
 107         public static function isLegacyMode()
 108         {
 109                 if (is_null(self::$legacy_mode)) {
 110                         self::$legacy_mode = (Config::get("system", "post_update_version") < 1279);
 111                 }
 112
 113                 return self::$legacy_mode;
 114         }
 115
 116         /**
 117          * Set the pinned state of an item
 118          *
 119          * @param integer $iid    Item ID
 120          * @param integer $uid    User ID
 121          * @param boolean $pinned Pinned state
 122          */
 123         public static function setPinned(int $iid, int $uid, bool $pinned)
 124         {
 125                 DBA::update('user-item', ['pinned' => $pinned], ['iid' => $iid, 'uid' => $uid], true);
 126         }
 127
 128         /**
 129          * Get the pinned state
 130          *
 131          * @param integer $iid Item ID
 132          * @param integer $uid User ID
 133          *
 134          * @return boolean pinned state
 135          */
 136         public static function getPinned(int $iid, int $uid)
 137         {
 138                 $useritem = DBA::selectFirst('user-item', ['pinned'], ['iid' => $iid, 'uid' => $uid]);
 139                 if (!DBA::isResult($useritem)) {
 140                         return false;
 141                 }
 142                 return (bool)$useritem['pinned'];
 143         }
 144
 145         /**
 146          * @brief Select pinned rows from the item table for a given user
 147          *
 148          * @param integer $uid       User ID
 149          * @param array   $selected  Array of selected fields, empty for all
 150          * @param array   $condition Array of fields for condition
 151          * @param array   $params    Array of several parameters
 152          *
 153          * @return boolean|object
 154          * @throws \Exception
 155          */
 156         public static function selectPinned(int $uid, array $selected = [], array $condition = [], $params = [])
 157         {
 158                 $useritems = DBA::select('user-item', ['iid'], ['uid' => $uid, 'pinned' => true]);
 159                 if (!DBA::isResult($useritems)) {
 160                         return $useritems;
 161                 }
 162
 163                 $pinned = [];
 164                 while ($useritem = self::fetch($useritems)) {
 165                         $pinned[] = $useritem['iid'];
 166                 }
 167                 DBA::close($useritems);
 168
 169                 if (empty($pinned)) {
 170                         return [];
 171                 }
 172
 173                 if (empty($condition) || !is_array($condition)) {
 174                         $condition = ['iid' => $pinned];
 175                 } else {
 176                         reset($condition);
 177                         $first_key = key($condition);
 178                         if (!is_int($first_key)) {
 179                                 $condition['iid'] = $pinned;
 180                         } else {
 181                                 $values_string = substr(str_repeat("?, ", count($pinned)), 0, -2);
 182                                 $condition[0] = '(' . $condition[0] . ") AND `iid` IN (" . $values_string . ")";
 183                                 $condition = array_merge($condition, $pinned);
 184                         }
 185                 }
 186
 187                 return self::selectThreadForUser($uid, $selected, $condition, $params);
 188         }
 189
 190         /**
 191          * @brief returns an activity index from an activity string
 192          *
 193          * @param string $activity activity string
 194          * @return integer Activity index
 195          */
 196         public static function activityToIndex($activity)
 197         {
 198                 $index = array_search($activity, self::ACTIVITIES);
 199
 200                 if (is_bool($index)) {
 201                         $index = -1;
 202                 }
 203
 204                 return $index;
 205         }
 206
 207         /**
 208          * @brief returns an activity string from an activity index
 209          *
 210          * @param integer $index activity index
 211          * @return string Activity string
 212          */
 213         private static function indexToActivity($index)
 214         {
 215                 if (is_null($index) || !array_key_exists($index, self::ACTIVITIES)) {
 216                         return '';
 217                 }
 218
 219                 return self::ACTIVITIES[$index];
 220         }
 221
 222         /**
 223          * @brief Fetch a single item row
 224          *
 225          * @param mixed $stmt statement object
 226          * @return array current row
 227          */
 228         public static function fetch($stmt)
 229         {
 230                 $row = DBA::fetch($stmt);
 231
 232                 if (is_bool($row)) {
 233                         return $row;
 234                 }
 235
 236                 // ---------------------- Transform item structure data ----------------------
 237
 238                 // We prefer the data from the user's contact over the public one
 239                 if (!empty($row['author-link']) && !empty($row['contact-link']) &&
 240                         ($row['author-link'] == $row['contact-link'])) {
 241                         if (isset($row['author-avatar']) && !empty($row['contact-avatar'])) {
 242                                 $row['author-avatar'] = $row['contact-avatar'];
 243                         }
 244                         if (isset($row['author-name']) && !empty($row['contact-name'])) {
 245                                 $row['author-name'] = $row['contact-name'];
 246                         }
 247                 }
 248
 249                 if (!empty($row['owner-link']) && !empty($row['contact-link']) &&
 250                         ($row['owner-link'] == $row['contact-link'])) {
 251                         if (isset($row['owner-avatar']) && !empty($row['contact-avatar'])) {
 252                                 $row['owner-avatar'] = $row['contact-avatar'];
 253                         }
 254                         if (isset($row['owner-name']) && !empty($row['contact-name'])) {
 255                                 $row['owner-name'] = $row['contact-name'];
 256                         }
 257                 }
 258
 259                 // We can always comment on posts from these networks
 260                 if (array_key_exists('writable', $row) &&
 261                         in_array($row['internal-network'], Protocol::FEDERATED)) {
 262                         $row['writable'] = true;
 263                 }
 264
 265                 // ---------------------- Transform item content data ----------------------
 266
 267                 // Fetch data from the item-content table whenever there is content there
 268                 if (self::isLegacyMode()) {
 269                         $legacy_fields = array_merge(ItemDeliveryData::LEGACY_FIELD_LIST, self::MIXED_CONTENT_FIELDLIST);
 270                         foreach ($legacy_fields as $field) {
 271                                 if (empty($row[$field]) && !empty($row['internal-item-' . $field])) {
 272                                         $row[$field] = $row['internal-item-' . $field];
 273                                 }
 274                                 unset($row['internal-item-' . $field]);
 275                         }
 276                 }
 277
 278                 if (!empty($row['internal-iaid']) && array_key_exists('verb', $row)) {
 279                         $row['verb'] = self::indexToActivity($row['internal-activity']);
 280                         if (array_key_exists('title', $row)) {
 281                                 $row['title'] = '';
 282                         }
 283                         if (array_key_exists('body', $row)) {
 284                                 $row['body'] = $row['verb'];
 285                         }
 286                         if (array_key_exists('object', $row)) {
 287                                 $row['object'] = '';
 288                         }
 289                         if (array_key_exists('object-type', $row)) {
 290                                 $row['object-type'] = Activity\ObjectType::NOTE;
 291                         }
 292                 } elseif (array_key_exists('verb', $row) && in_array($row['verb'], ['', Activity::POST, Activity::SHARE])) {
 293                         // Posts don't have a target - but having tags or files.
 294                         // We safe some performance by building tag and file strings only here.
 295                         // We remove the target since they aren't used for this type.
 296                         // In mail posts we do store some mail header data in the object.
 297                         if (array_key_exists('target', $row)) {
 298                                 $row['target'] = '';
 299                         }
 300                 }
 301
 302                 if (!array_key_exists('verb', $row) || in_array($row['verb'], ['', Activity::POST, Activity::SHARE])) {
 303                         // Build the tag string out of the term entries
 304                         if (array_key_exists('tag', $row) && empty($row['tag'])) {
 305                                 $row['tag'] = Term::tagTextFromItemId($row['internal-iid']);
 306                         }
 307
 308                         // Build the file string out of the term entries
 309                         if (array_key_exists('file', $row) && empty($row['file'])) {
 310                                 $row['file'] = Term::fileTextFromItemId($row['internal-iid']);
 311                         }
 312                 }
 313
 314                 if (array_key_exists('signed_text', $row) && array_key_exists('interaction', $row) && !is_null($row['interaction'])) {
 315                         $row['signed_text'] = $row['interaction'];
 316                 }
 317
 318                 if (array_key_exists('ignored', $row) && array_key_exists('internal-user-ignored', $row) && !is_null($row['internal-user-ignored'])) {
 319                         $row['ignored'] = $row['internal-user-ignored'];
 320                 }
 321
 322                 // Remove internal fields
 323                 unset($row['internal-activity']);
 324                 unset($row['internal-network']);
 325                 unset($row['internal-iid']);
 326                 unset($row['internal-iaid']);
 327                 unset($row['internal-icid']);
 328                 unset($row['internal-user-ignored']);
 329                 unset($row['interaction']);
 330
 331                 return $row;
 332         }
 333
 334         /**
 335          * @brief Fills an array with data from an item query
 336          *
 337          * @param object $stmt statement object
 338          * @param bool   $do_close
 339          * @return array Data array
 340          */
 341         public static function inArray($stmt, $do_close = true) {
 342                 if (is_bool($stmt)) {
 343                         return $stmt;
 344                 }
 345
 346                 $data = [];
 347                 while ($row = self::fetch($stmt)) {
 348                         $data[] = $row;
 349                 }
 350                 if ($do_close) {
 351                         DBA::close($stmt);
 352                 }
 353                 return $data;
 354         }
 355
 356         /**
 357          * @brief Check if item data exists
 358          *
 359          * @param array $condition array of fields for condition
 360          *
 361          * @return boolean Are there rows for that condition?
 362          * @throws \Exception
 363          */
 364         public static function exists($condition) {
 365                 $stmt = self::select(['id'], $condition, ['limit' => 1]);
 366
 367                 if (is_bool($stmt)) {
 368                         $retval = $stmt;
 369                 } else {
 370                         $retval = (DBA::numRows($stmt) > 0);
 371                 }
 372
 373                 DBA::close($stmt);
 374
 375                 return $retval;
 376         }
 377
 378         /**
 379          * Retrieve a single record from the item table for a given user and returns it in an associative array
 380          *
 381          * @brief Retrieve a single record from a table
 382          * @param integer $uid User ID
 383          * @param array   $selected
 384          * @param array   $condition
 385          * @param array   $params
 386          * @return bool|array
 387          * @throws \Exception
 388          * @see   DBA::select
 389          */
 390         public static function selectFirstForUser($uid, array $selected = [], array $condition = [], $params = [])
 391         {
 392                 $params['uid'] = $uid;
 393
 394                 if (empty($selected)) {
 395                         $selected = Item::DISPLAY_FIELDLIST;
 396                 }
 397
 398                 return self::selectFirst($selected, $condition, $params);
 399         }
 400
 401         /**
 402          * @brief Select rows from the item table for a given user
 403          *
 404          * @param integer $uid       User ID
 405          * @param array   $selected  Array of selected fields, empty for all
 406          * @param array   $condition Array of fields for condition
 407          * @param array   $params    Array of several parameters
 408          *
 409          * @return boolean|object
 410          * @throws \Exception
 411          */
 412         public static function selectForUser($uid, array $selected = [], array $condition = [], $params = [])
 413         {
 414                 $params['uid'] = $uid;
 415
 416                 if (empty($selected)) {
 417                         $selected = Item::DISPLAY_FIELDLIST;
 418                 }
 419
 420                 return self::select($selected, $condition, $params);
 421         }
 422
 423         /**
 424          * Retrieve a single record from the item table and returns it in an associative array
 425          *
 426          * @brief Retrieve a single record from a table
 427          * @param array $fields
 428          * @param array $condition
 429          * @param array $params
 430          * @return bool|array
 431          * @throws \Exception
 432          * @see   DBA::select
 433          */
 434         public static function selectFirst(array $fields = [], array $condition = [], $params = [])
 435         {
 436                 $params['limit'] = 1;
 437
 438                 $result = self::select($fields, $condition, $params);
 439
 440                 if (is_bool($result)) {
 441                         return $result;
 442                 } else {
 443                         $row = self::fetch($result);
 444                         DBA::close($result);
 445                         return $row;
 446                 }
 447         }
 448
 449         /**
 450          * @brief Select rows from the item table and returns them as an array
 451          *
 452          * @param array $selected  Array of selected fields, empty for all
 453          * @param array $condition Array of fields for condition
 454          * @param array $params    Array of several parameters
 455          *
 456          * @return array
 457          * @throws \Exception
 458          */
 459         public static function selectToArray(array $fields = [], array $condition = [], $params = [])
 460         {
 461                 $result = self::select($fields, $condition, $params);
 462
 463                 if (is_bool($result)) {
 464                         return [];
 465                 }
 466
 467                 $data = [];
 468                 while ($row = self::fetch($result)) {
 469                         $data[] = $row;
 470                 }
 471                 DBA::close($result);
 472
 473                 return $data;
 474         }
 475
 476         /**
 477          * @brief Select rows from the item table
 478          *
 479          * @param array $selected  Array of selected fields, empty for all
 480          * @param array $condition Array of fields for condition
 481          * @param array $params    Array of several parameters
 482          *
 483          * @return boolean|object
 484          * @throws \Exception
 485          */
 486         public static function select(array $selected = [], array $condition = [], $params = [])
 487         {
 488                 $uid = 0;
 489                 $usermode = false;
 490
 491                 if (isset($params['uid'])) {
 492                         $uid = $params['uid'];
 493                         $usermode = true;
 494                 }
 495
 496                 $fields = self::fieldlist($usermode);
 497
 498                 $select_fields = self::constructSelectFields($fields, $selected);
 499
 500                 $condition_string = DBA::buildCondition($condition);
 501
 502                 $condition_string = self::addTablesToFields($condition_string, $fields);
 503
 504                 if ($usermode) {
 505                         $condition_string = $condition_string . ' AND ' . self::condition(false);
 506                 }
 507
 508                 $param_string = self::addTablesToFields(DBA::buildParameter($params), $fields);
 509
 510                 $table = "`item` " . self::constructJoins($uid, $select_fields . $condition_string . $param_string, false, $usermode);
 511
 512                 $sql = "SELECT " . $select_fields . " FROM " . $table . $condition_string . $param_string;
 513
 514                 return DBA::p($sql, $condition);
 515         }
 516
 517         /**
 518          * @brief Select rows from the starting post in the item table
 519          *
 520          * @param integer $uid       User ID
 521          * @param array   $selected
 522          * @param array   $condition Array of fields for condition
 523          * @param array   $params    Array of several parameters
 524          *
 525          * @return boolean|object
 526          * @throws \Exception
 527          */
 528         public static function selectThreadForUser($uid, array $selected = [], array $condition = [], $params = [])
 529         {
 530                 $params['uid'] = $uid;
 531
 532                 if (empty($selected)) {
 533                         $selected = Item::DISPLAY_FIELDLIST;
 534                 }
 535
 536                 return self::selectThread($selected, $condition, $params);
 537         }
 538
 539         /**
 540          * Retrieve a single record from the starting post in the item table and returns it in an associative array
 541          *
 542          * @brief Retrieve a single record from a table
 543          * @param integer $uid User ID
 544          * @param array   $selected
 545          * @param array   $condition
 546          * @param array   $params
 547          * @return bool|array
 548          * @throws \Exception
 549          * @see   DBA::select
 550          */
 551         public static function selectFirstThreadForUser($uid, array $selected = [], array $condition = [], $params = [])
 552         {
 553                 $params['uid'] = $uid;
 554
 555                 if (empty($selected)) {
 556                         $selected = Item::DISPLAY_FIELDLIST;
 557                 }
 558
 559                 return self::selectFirstThread($selected, $condition, $params);
 560         }
 561
 562         /**
 563          * Retrieve a single record from the starting post in the item table and returns it in an associative array
 564          *
 565          * @brief Retrieve a single record from a table
 566          * @param array $fields
 567          * @param array $condition
 568          * @param array $params
 569          * @return bool|array
 570          * @throws \Exception
 571          * @see   DBA::select
 572          */
 573         public static function selectFirstThread(array $fields = [], array $condition = [], $params = [])
 574         {
 575                 $params['limit'] = 1;
 576                 $result = self::selectThread($fields, $condition, $params);
 577
 578                 if (is_bool($result)) {
 579                         return $result;
 580                 } else {
 581                         $row = self::fetch($result);
 582                         DBA::close($result);
 583                         return $row;
 584                 }
 585         }
 586
 587         /**
 588          * @brief Select rows from the starting post in the item table
 589          *
 590          * @param array $selected  Array of selected fields, empty for all
 591          * @param array $condition Array of fields for condition
 592          * @param array $params    Array of several parameters
 593          *
 594          * @return boolean|object
 595          * @throws \Exception
 596          */
 597         public static function selectThread(array $selected = [], array $condition = [], $params = [])
 598         {
 599                 $uid = 0;
 600                 $usermode = false;
 601
 602                 if (isset($params['uid'])) {
 603                         $uid = $params['uid'];
 604                         $usermode = true;
 605                 }
 606
 607                 $fields = self::fieldlist($usermode);
 608
 609                 $fields['thread'] = ['mention', 'ignored', 'iid'];
 610
 611                 $threadfields = ['thread' => ['iid', 'uid', 'contact-id', 'owner-id', 'author-id',
 612                         'created', 'edited', 'commented', 'received', 'changed', 'wall', 'private',
 613                         'pubmail', 'moderated', 'visible', 'starred', 'ignored', 'post-type',
 614                         'unseen', 'deleted', 'origin', 'forum_mode', 'mention', 'network']];
 615
 616                 $select_fields = self::constructSelectFields($fields, $selected);
 617
 618                 $condition_string = DBA::buildCondition($condition);
 619
 620                 $condition_string = self::addTablesToFields($condition_string, $threadfields);
 621                 $condition_string = self::addTablesToFields($condition_string, $fields);
 622
 623                 if ($usermode) {
 624                         $condition_string = $condition_string . ' AND ' . self::condition(true);
 625                 }
 626
 627                 $param_string = DBA::buildParameter($params);
 628                 $param_string = self::addTablesToFields($param_string, $threadfields);
 629                 $param_string = self::addTablesToFields($param_string, $fields);
 630
 631                 $table = "`thread` " . self::constructJoins($uid, $select_fields . $condition_string . $param_string, true, $usermode);
 632
 633                 $sql = "SELECT " . $select_fields . " FROM " . $table . $condition_string . $param_string;
 634
 635                 return DBA::p($sql, $condition);
 636         }
 637
 638         /**
 639          * @brief Returns a list of fields that are associated with the item table
 640          *
 641          * @param $usermode
 642          * @return array field list
 643          */
 644         private static function fieldlist($usermode)
 645         {
 646                 $fields = [];
 647
 648                 $fields['item'] = ['id', 'uid', 'parent', 'uri', 'parent-uri', 'thr-parent', 'guid',
 649                         'contact-id', 'owner-id', 'author-id', 'type', 'wall', 'gravity', 'extid',
 650                         'created', 'edited', 'commented', 'received', 'changed', 'psid',
 651                         'resource-id', 'event-id', 'tag', 'attach', 'post-type', 'file',
 652                         'private', 'pubmail', 'moderated', 'visible', 'starred', 'bookmark',
 653                         'unseen', 'deleted', 'origin', 'forum_mode', 'mention', 'global',
 654                         'id' => 'item_id', 'network', 'icid', 'iaid', 'id' => 'internal-iid',
 655                         'network' => 'internal-network', 'icid' => 'internal-icid',
 656                         'iaid' => 'internal-iaid'];
 657
 658                 if ($usermode) {
 659                         $fields['user-item'] = ['pinned', 'ignored' => 'internal-user-ignored'];
 660                 }
 661
 662                 $fields['item-activity'] = ['activity', 'activity' => 'internal-activity'];
 663
 664                 $fields['item-content'] = array_merge(self::CONTENT_FIELDLIST, self::MIXED_CONTENT_FIELDLIST);
 665
 666                 $fields['item-delivery-data'] = array_merge(ItemDeliveryData::LEGACY_FIELD_LIST, ItemDeliveryData::FIELD_LIST);
 667
 668                 $fields['permissionset'] = ['allow_cid', 'allow_gid', 'deny_cid', 'deny_gid'];
 669
 670                 $fields['author'] = ['url' => 'author-link', 'name' => 'author-name', 'addr' => 'author-addr',
 671                         'thumb' => 'author-avatar', 'nick' => 'author-nick', 'network' => 'author-network'];
 672
 673                 $fields['owner'] = ['url' => 'owner-link', 'name' => 'owner-name', 'addr' => 'owner-addr',
 674                         'thumb' => 'owner-avatar', 'nick' => 'owner-nick', 'network' => 'owner-network'];
 675
 676                 $fields['contact'] = ['url' => 'contact-link', 'name' => 'contact-name', 'thumb' => 'contact-avatar',
 677                         'writable', 'self', 'id' => 'cid', 'alias', 'uid' => 'contact-uid',
 678                         'photo', 'name-date', 'uri-date', 'avatar-date', 'thumb', 'dfrn-id'];
 679
 680                 $fields['parent-item'] = ['guid' => 'parent-guid', 'network' => 'parent-network'];
 681
 682                 $fields['parent-item-author'] = ['url' => 'parent-author-link', 'name' => 'parent-author-name'];
 683
 684                 $fields['event'] = ['created' => 'event-created', 'edited' => 'event-edited',
 685                         'start' => 'event-start','finish' => 'event-finish',
 686                         'summary' => 'event-summary','desc' => 'event-desc',
 687                         'location' => 'event-location', 'type' => 'event-type',
 688                         'nofinish' => 'event-nofinish','adjust' => 'event-adjust',
 689                         'ignore' => 'event-ignore', 'id' => 'event-id'];
 690
 691                 $fields['sign'] = ['signed_text', 'signature', 'signer'];
 692
 693                 $fields['diaspora-interaction'] = ['interaction'];
 694
 695                 return $fields;
 696         }
 697
 698         /**
 699          * @brief Returns SQL condition for the "select" functions
 700          *
 701          * @param boolean $thread_mode Called for the items (false) or for the threads (true)
 702          *
 703          * @return string SQL condition
 704          */
 705         private static function condition($thread_mode)
 706         {
 707                 if ($thread_mode) {
 708                         $master_table = "`thread`";
 709                 } else {
 710                         $master_table = "`item`";
 711                 }
 712                 return sprintf("$master_table.`visible` AND NOT $master_table.`deleted` AND NOT $master_table.`moderated`
 713                         AND (`user-item`.`hidden` IS NULL OR NOT `user-item`.`hidden`)
 714                         AND (`user-author`.`blocked` IS NULL OR NOT `user-author`.`blocked`)
 715                         AND (`user-author`.`ignored` IS NULL OR NOT `user-author`.`ignored` OR `item`.`gravity` != %d)
 716                         AND (`user-owner`.`blocked` IS NULL OR NOT `user-owner`.`blocked`)
 717                         AND (`user-owner`.`ignored` IS NULL OR NOT `user-owner`.`ignored` OR `item`.`gravity` != %d) ",
 718                         GRAVITY_PARENT, GRAVITY_PARENT);
 719         }
 720
 721         /**
 722          * @brief Returns all needed "JOIN" commands for the "select" functions
 723          *
 724          * @param integer $uid          User ID
 725          * @param string  $sql_commands The parts of the built SQL commands in the "select" functions
 726          * @param boolean $thread_mode  Called for the items (false) or for the threads (true)
 727          *
 728          * @param         $user_mode
 729          * @return string The SQL joins for the "select" functions
 730          */
 731         private static function constructJoins($uid, $sql_commands, $thread_mode, $user_mode)
 732         {
 733                 if ($thread_mode) {
 734                         $master_table = "`thread`";
 735                         $master_table_key = "`thread`.`iid`";
 736                         $joins = "STRAIGHT_JOIN `item` ON `item`.`id` = `thread`.`iid` ";
 737                 } else {
 738                         $master_table = "`item`";
 739                         $master_table_key = "`item`.`id`";
 740                         $joins = '';
 741                 }
 742
 743                 if ($user_mode) {
 744                         $joins .= sprintf("STRAIGHT_JOIN `contact` ON `contact`.`id` = $master_table.`contact-id`
 745                                 AND NOT `contact`.`blocked`
 746                                 AND ((NOT `contact`.`readonly` AND NOT `contact`.`pending` AND (`contact`.`rel` IN (%s, %s)))
 747                                 OR `contact`.`self` OR `item`.`gravity` != %d OR `contact`.`uid` = 0)
 748                                 STRAIGHT_JOIN `contact` AS `author` ON `author`.`id` = $master_table.`author-id` AND NOT `author`.`blocked`
 749                                 STRAIGHT_JOIN `contact` AS `owner` ON `owner`.`id` = $master_table.`owner-id` AND NOT `owner`.`blocked`
 750                                 LEFT JOIN `user-item` ON `user-item`.`iid` = $master_table_key AND `user-item`.`uid` = %d
 751                                 LEFT JOIN `user-contact` AS `user-author` ON `user-author`.`cid` = $master_table.`author-id` AND `user-author`.`uid` = %d
 752                                 LEFT JOIN `user-contact` AS `user-owner` ON `user-owner`.`cid` = $master_table.`owner-id` AND `user-owner`.`uid` = %d",
 753                                 Contact::SHARING, Contact::FRIEND, GRAVITY_PARENT, intval($uid), intval($uid), intval($uid));
 754                 } else {
 755                         if (strpos($sql_commands, "`contact`.") !== false) {
 756                                 $joins .= "LEFT JOIN `contact` ON `contact`.`id` = $master_table.`contact-id`";
 757                         }
 758                         if (strpos($sql_commands, "`author`.") !== false) {
 759                                 $joins .= " LEFT JOIN `contact` AS `author` ON `author`.`id` = $master_table.`author-id`";
 760                         }
 761                         if (strpos($sql_commands, "`owner`.") !== false) {
 762                                 $joins .= " LEFT JOIN `contact` AS `owner` ON `owner`.`id` = $master_table.`owner-id`";
 763                         }
 764                 }
 765
 766                 if (strpos($sql_commands, "`group_member`.") !== false) {
 767                         $joins .= " STRAIGHT_JOIN `group_member` ON `group_member`.`contact-id` = $master_table.`contact-id`";
 768                 }
 769
 770                 if (strpos($sql_commands, "`user`.") !== false) {
 771                         $joins .= " STRAIGHT_JOIN `user` ON `user`.`uid` = $master_table.`uid`";
 772                 }
 773
 774                 if (strpos($sql_commands, "`event`.") !== false) {
 775                         $joins .= " LEFT JOIN `event` ON `event-id` = `event`.`id`";
 776                 }
 777
 778                 if (strpos($sql_commands, "`sign`.") !== false) {
 779                         $joins .= " LEFT JOIN `sign` ON `sign`.`iid` = `item`.`id`";
 780                 }
 781
 782                 if (strpos($sql_commands, "`diaspora-interaction`.") !== false) {
 783                         $joins .= " LEFT JOIN `diaspora-interaction` ON `diaspora-interaction`.`uri-id` = `item`.`uri-id`";
 784                 }
 785
 786                 if (strpos($sql_commands, "`item-activity`.") !== false) {
 787                         $joins .= " LEFT JOIN `item-activity` ON `item-activity`.`uri-id` = `item`.`uri-id`";
 788                 }
 789
 790                 if (strpos($sql_commands, "`item-content`.") !== false) {
 791                         $joins .= " LEFT JOIN `item-content` ON `item-content`.`uri-id` = `item`.`uri-id`";
 792                 }
 793
 794                 if (strpos($sql_commands, "`item-delivery-data`.") !== false) {
 795                         $joins .= " LEFT JOIN `item-delivery-data` ON `item-delivery-data`.`iid` = `item`.`id`";
 796                 }
 797
 798                 if (strpos($sql_commands, "`permissionset`.") !== false) {
 799                         $joins .= " LEFT JOIN `permissionset` ON `permissionset`.`id` = `item`.`psid`";
 800                 }
 801
 802                 if ((strpos($sql_commands, "`parent-item`.") !== false) || (strpos($sql_commands, "`parent-author`.") !== false)) {
 803                         $joins .= " STRAIGHT_JOIN `item` AS `parent-item` ON `parent-item`.`id` = `item`.`parent`";
 804                 }
 805
 806                 if (strpos($sql_commands, "`parent-item-author`.") !== false) {
 807                         $joins .= " STRAIGHT_JOIN `contact` AS `parent-item-author` ON `parent-item-author`.`id` = `parent-item`.`author-id`";
 808                 }
 809
 810                 return $joins;
 811         }
 812
 813         /**
 814          * @brief Add the field list for the "select" functions
 815          *
 816          * @param array $fields The field definition array
 817          * @param array $selected The array with the selected fields from the "select" functions
 818          *
 819          * @return string The field list
 820          */
 821         private static function constructSelectFields($fields, $selected)
 822         {
 823                 if (!empty($selected)) {
 824                         $selected[] = 'internal-iid';
 825                         $selected[] = 'internal-iaid';
 826                         $selected[] = 'internal-icid';
 827                         $selected[] = 'internal-network';
 828                 }
 829
 830                 if (in_array('verb', $selected)) {
 831                         $selected[] = 'internal-activity';
 832                 }
 833
 834                 if (in_array('ignored', $selected)) {
 835                         $selected[] = 'internal-user-ignored';
 836                 }
 837
 838                 if (in_array('signed_text', $selected)) {
 839                         $selected[] = 'interaction';
 840                 }
 841
 842                 $legacy_fields = array_merge(ItemDeliveryData::LEGACY_FIELD_LIST, self::MIXED_CONTENT_FIELDLIST);
 843
 844                 $selection = [];
 845                 foreach ($fields as $table => $table_fields) {
 846                         foreach ($table_fields as $field => $select) {
 847                                 if (empty($selected) || in_array($select, $selected)) {
 848                                         if (self::isLegacyMode() && in_array($select, $legacy_fields)) {
 849                                                 $selection[] = "`item`.`".$select."` AS `internal-item-" . $select . "`";
 850                                         }
 851                                         if (is_int($field)) {
 852                                                 $selection[] = "`" . $table . "`.`" . $select . "`";
 853                                         } else {
 854                                                 $selection[] = "`" . $table . "`.`" . $field . "` AS `" . $select . "`";
 855                                         }
 856                                 }
 857                         }
 858                 }
 859                 return implode(", ", $selection);
 860         }
 861
 862         /**
 863          * @brief add table definition to fields in an SQL query
 864          *
 865          * @param string $query SQL query
 866          * @param array $fields The field definition array
 867          *
 868          * @return string the changed SQL query
 869          */
 870         private static function addTablesToFields($query, $fields)
 871         {
 872                 foreach ($fields as $table => $table_fields) {
 873                         foreach ($table_fields as $alias => $field) {
 874                                 if (is_int($alias)) {
 875                                         $replace_field = $field;
 876                                 } else {
 877                                         $replace_field = $alias;
 878                                 }
 879
 880                                 $search = "/([^\.])`" . $field . "`/i";
 881                                 $replace = "$1`" . $table . "`.`" . $replace_field . "`";
 882                                 $query = preg_replace($search, $replace, $query);
 883                         }
 884                 }
 885                 return $query;
 886         }
 887
 888         /**
 889          * @brief Update existing item entries
 890          *
 891          * @param array $fields    The fields that are to be changed
 892          * @param array $condition The condition for finding the item entries
 893          *
 894          * In the future we may have to change permissions as well.
 895          * Then we had to add the user id as third parameter.
 896          *
 897          * A return value of "0" doesn't mean an error - but that 0 rows had been changed.
 898          *
 899          * @return integer|boolean number of affected rows - or "false" if there was an error
 900          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 901          */
 902         public static function update(array $fields, array $condition)
 903         {
 904                 if (empty($condition) || empty($fields)) {
 905                         return false;
 906                 }
 907
 908                 // To ensure the data integrity we do it in an transaction
 909                 DBA::transaction();
 910
 911                 // We cannot simply expand the condition to check for origin entries
 912                 // The condition needn't to be a simple array but could be a complex condition.
 913                 // And we have to execute this query before the update to ensure to fetch the same data.
 914                 $items = DBA::select('item', ['id', 'origin', 'uri', 'uri-id', 'iaid', 'icid', 'tag', 'file'], $condition);
 915
 916                 $content_fields = [];
 917                 foreach (array_merge(self::CONTENT_FIELDLIST, self::MIXED_CONTENT_FIELDLIST) as $field) {
 918                         if (isset($fields[$field])) {
 919                                 $content_fields[$field] = $fields[$field];
 920                                 if (in_array($field, self::CONTENT_FIELDLIST) || !self::isLegacyMode()) {
 921                                         unset($fields[$field]);
 922                                 } else {
 923                                         $fields[$field] = null;
 924                                 }
 925                         }
 926                 }
 927
 928                 $delivery_data = ItemDeliveryData::extractFields($fields);
 929
 930                 $clear_fields = ['bookmark', 'type', 'author-name', 'author-avatar', 'author-link', 'owner-name', 'owner-avatar', 'owner-link', 'postopts', 'inform'];
 931                 foreach ($clear_fields as $field) {
 932                         if (array_key_exists($field, $fields)) {
 933                                 $fields[$field] = null;
 934                         }
 935                 }
 936
 937                 if (array_key_exists('tag', $fields)) {
 938                         $tags = $fields['tag'];
 939                         $fields['tag'] = null;
 940                 } else {
 941                         $tags = null;
 942                 }
 943
 944                 if (array_key_exists('file', $fields)) {
 945                         $files = $fields['file'];
 946                         $fields['file'] = null;
 947                 } else {
 948                         $files = null;
 949                 }
 950
 951                 if (!empty($fields)) {
 952                         $success = DBA::update('item', $fields, $condition);
 953
 954                         if (!$success) {
 955                                 DBA::close($items);
 956                                 DBA::rollback();
 957                                 return false;
 958                         }
 959                 }
 960
 961                 // When there is no content for the "old" item table, this will count the fetched items
 962                 $rows = DBA::affectedRows();
 963
 964                 $notify_items = [];
 965
 966                 while ($item = DBA::fetch($items)) {
 967                         if (!empty($item['iaid']) || (!empty($content_fields['verb']) && (self::activityToIndex($content_fields['verb']) >= 0))) {
 968                                 self::updateActivity($content_fields, ['uri-id' => $item['uri-id']]);
 969
 970                                 if (empty($item['iaid'])) {
 971                                         $item_activity = DBA::selectFirst('item-activity', ['id'], ['uri-id' => $item['uri-id']]);
 972                                         if (DBA::isResult($item_activity)) {
 973                                                 $item_fields = ['iaid' => $item_activity['id'], 'icid' => null];
 974                                                 foreach (self::MIXED_CONTENT_FIELDLIST as $field) {
 975                                                         if (self::isLegacyMode()) {
 976                                                                 $item_fields[$field] = null;
 977                                                         } else {
 978                                                                 unset($item_fields[$field]);
 979                                                         }
 980                                                 }
 981                                                 DBA::update('item', $item_fields, ['id' => $item['id']]);
 982
 983                                                 if (!empty($item['icid']) && !DBA::exists('item', ['icid' => $item['icid']])) {
 984                                                         DBA::delete('item-content', ['id' => $item['icid']]);
 985                                                 }
 986                                         }
 987                                 } elseif (!empty($item['icid'])) {
 988                                         DBA::update('item', ['icid' => null], ['id' => $item['id']]);
 989
 990                                         if (!DBA::exists('item', ['icid' => $item['icid']])) {
 991                                                 DBA::delete('item-content', ['id' => $item['icid']]);
 992                                         }
 993                                 }
 994                         } else {
 995                                 self::updateContent($content_fields, ['uri-id' => $item['uri-id']]);
 996
 997                                 if (empty($item['icid'])) {
 998                                         $item_content = DBA::selectFirst('item-content', [], ['uri-id' => $item['uri-id']]);
 999                                         if (DBA::isResult($item_content)) {
1000                                                 $item_fields = ['icid' => $item_content['id']];
1001                                                 // Clear all fields in the item table that have a content in the item-content table
1002                                                 foreach ($item_content as $field => $content) {
1003                                                         if (in_array($field, self::MIXED_CONTENT_FIELDLIST) && !empty($item_content[$field])) {
1004                                                                 if (self::isLegacyMode()) {
1005                                                                         $item_fields[$field] = null;
1006                                                                 } else {
1007                                                                         unset($item_fields[$field]);
1008                                                                 }
1009                                                         }
1010                                                 }
1011                                                 DBA::update('item', $item_fields, ['id' => $item['id']]);
1012                                         }
1013                                 }
1014                         }
1015
1016                         if (!is_null($tags)) {
1017                                 Term::insertFromTagFieldByItemId($item['id'], $tags);
1018                                 if (!empty($item['tag'])) {
1019                                         DBA::update('item', ['tag' => ''], ['id' => $item['id']]);
1020                                 }
1021                         }
1022
1023                         if (!is_null($files)) {
1024                                 Term::insertFromFileFieldByItemId($item['id'], $files);
1025                                 if (!empty($item['file'])) {
1026                                         DBA::update('item', ['file' => ''], ['id' => $item['id']]);
1027                                 }
1028                         }
1029
1030                         ItemDeliveryData::update($item['id'], $delivery_data);
1031
1032                         self::updateThread($item['id']);
1033
1034                         // We only need to notfiy others when it is an original entry from us.
1035                         // Only call the notifier when the item has some content relevant change.
1036                         if ($item['origin'] && in_array('edited', array_keys($fields))) {
1037                                 $notify_items[] = $item['id'];
1038                         }
1039                 }
1040
1041                 DBA::close($items);
1042                 DBA::commit();
1043
1044                 foreach ($notify_items as $notify_item) {
1045                         Worker::add(PRIORITY_HIGH, "Notifier", Delivery::POST, $notify_item);
1046                 }
1047
1048                 return $rows;
1049         }
1050
1051         /**
1052          * @brief Delete an item and notify others about it - if it was ours
1053          *
1054          * @param array   $condition The condition for finding the item entries
1055          * @param integer $priority  Priority for the notification
1056          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1057          */
1058         public static function delete($condition, $priority = PRIORITY_HIGH)
1059         {
1060                 $items = self::select(['id'], $condition);
1061                 while ($item = self::fetch($items)) {
1062                         self::deleteById($item['id'], $priority);
1063                 }
1064                 DBA::close($items);
1065         }
1066
1067         /**
1068          * @brief Delete an item for an user and notify others about it - if it was ours
1069          *
1070          * @param array   $condition The condition for finding the item entries
1071          * @param integer $uid       User who wants to delete this item
1072          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1073          */
1074         public static function deleteForUser($condition, $uid)
1075         {
1076                 if ($uid == 0) {
1077                         return;
1078                 }
1079
1080                 $items = self::select(['id', 'uid'], $condition);
1081                 while ($item = self::fetch($items)) {
1082                         // "Deleting" global items just means hiding them
1083                         if ($item['uid'] == 0) {
1084                                 DBA::update('user-item', ['hidden' => true], ['iid' => $item['id'], 'uid' => $uid], true);
1085
1086                                 // Delete notifications
1087                                 DBA::delete('notify', ['iid' => $item['id'], 'uid' => $uid]);
1088                         } elseif ($item['uid'] == $uid) {
1089                                 self::deleteById($item['id'], PRIORITY_HIGH);
1090                         } else {
1091                                 Logger::log('Wrong ownership. Not deleting item ' . $item['id']);
1092                         }
1093                 }
1094                 DBA::close($items);
1095         }
1096
1097         /**
1098          * @brief Delete an item and notify others about it - if it was ours
1099          *
1100          * @param integer $item_id  Item ID that should be delete
1101          * @param integer $priority Priority for the notification
1102          *
1103          * @return boolean success
1104          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1105          */
1106         public static function deleteById($item_id, $priority = PRIORITY_HIGH)
1107         {
1108                 // locate item to be deleted
1109                 $fields = ['id', 'uri', 'uid', 'parent', 'parent-uri', 'origin',
1110                         'deleted', 'file', 'resource-id', 'event-id', 'attach',
1111                         'verb', 'object-type', 'object', 'target', 'contact-id',
1112                         'icid', 'iaid', 'psid'];
1113                 $item = self::selectFirst($fields, ['id' => $item_id]);
1114                 if (!DBA::isResult($item)) {
1115                         Logger::log('Item with ID ' . $item_id . " hasn't been found.", Logger::DEBUG);
1116                         return false;
1117                 }
1118
1119                 if ($item['deleted']) {
1120                         Logger::log('Item with ID ' . $item_id . ' has already been deleted.', Logger::DEBUG);
1121                         return false;
1122                 }
1123
1124                 $parent = self::selectFirst(['origin'], ['id' => $item['parent']]);
1125                 if (!DBA::isResult($parent)) {
1126                         $parent = ['origin' => false];
1127                 }
1128
1129                 // clean up categories and tags so they don't end up as orphans
1130
1131                 $matches = false;
1132                 $cnt = preg_match_all('/<(.*?)>/', $item['file'], $matches, PREG_SET_ORDER);
1133
1134                 if ($cnt) {
1135                         foreach ($matches as $mtch) {
1136                                 FileTag::unsaveFile($item['uid'], $item['id'], $mtch[1],true);
1137                         }
1138                 }
1139
1140                 $matches = false;
1141
1142                 $cnt = preg_match_all('/\[(.*?)\]/', $item['file'], $matches, PREG_SET_ORDER);
1143
1144                 if ($cnt) {
1145                         foreach ($matches as $mtch) {
1146                                 FileTag::unsaveFile($item['uid'], $item['id'], $mtch[1],false);
1147                         }
1148                 }
1149
1150                 /*
1151                  * If item is a link to a photo resource, nuke all the associated photos
1152                  * (visitors will not have photo resources)
1153                  * This only applies to photos uploaded from the photos page. Photos inserted into a post do not
1154                  * generate a resource-id and therefore aren't intimately linked to the item.
1155                  */
1156                 /// @TODO: this should first check if photo is used elsewhere
1157                 if (strlen($item['resource-id'])) {
1158                         Photo::delete(['resource-id' => $item['resource-id'], 'uid' => $item['uid']]);
1159                 }
1160
1161                 // If item is a link to an event, delete the event.
1162                 if (intval($item['event-id'])) {
1163                         Event::delete($item['event-id']);
1164                 }
1165
1166                 // If item has attachments, drop them
1167                 /// @TODO: this should first check if attachment is used elsewhere
1168                 foreach (explode(",", $item['attach']) as $attach) {
1169                         preg_match("|attach/(\d+)|", $attach, $matches);
1170                         if (is_array($matches) && count($matches) > 1) {
1171                                 Attach::delete(['id' => $matches[1], 'uid' => $item['uid']]);
1172                         }
1173                 }
1174
1175                 // Delete tags that had been attached to other items
1176                 self::deleteTagsFromItem($item);
1177
1178                 // Delete notifications
1179                 DBA::delete('notify', ['iid' => $item['id'], 'uid' => $item['uid']]);
1180
1181                 // Set the item to "deleted"
1182                 $item_fields = ['deleted' => true, 'edited' => DateTimeFormat::utcNow(), 'changed' => DateTimeFormat::utcNow()];
1183                 DBA::update('item', $item_fields, ['id' => $item['id']]);
1184
1185                 Term::insertFromTagFieldByItemId($item['id'], '');
1186                 Term::insertFromFileFieldByItemId($item['id'], '');
1187                 self::deleteThread($item['id'], $item['parent-uri']);
1188
1189                 if (!self::exists(["`uri` = ? AND `uid` != 0 AND NOT `deleted`", $item['uri']])) {
1190                         self::delete(['uri' => $item['uri'], 'uid' => 0, 'deleted' => false], $priority);
1191                 }
1192
1193                 ItemDeliveryData::delete($item['id']);
1194
1195                 // We don't delete the item-activity here, since we need some of the data for ActivityPub
1196
1197                 if (!empty($item['icid']) && !self::exists(['icid' => $item['icid'], 'deleted' => false])) {
1198                         DBA::delete('item-content', ['id' => $item['icid']], ['cascade' => false]);
1199                 }
1200                 // When the permission set will be used in photo and events as well,
1201                 // this query here needs to be extended.
1202                 // @todo Currently deactivated. We need the permission set in the deletion process.
1203                 // This is a reminder to add the removal somewhere else.
1204                 //if (!empty($item['psid']) && !self::exists(['psid' => $item['psid'], 'deleted' => false])) {
1205                 //      DBA::delete('permissionset', ['id' => $item['psid']], ['cascade' => false]);
1206                 //}
1207
1208                 // If it's the parent of a comment thread, kill all the kids
1209                 if ($item['id'] == $item['parent']) {
1210                         self::delete(['parent' => $item['parent'], 'deleted' => false], $priority);
1211                 }
1212
1213                 // Is it our comment and/or our thread?
1214                 if ($item['origin'] || $parent['origin']) {
1215
1216                         // When we delete the original post we will delete all existing copies on the server as well
1217                         self::delete(['uri' => $item['uri'], 'deleted' => false], $priority);
1218
1219                         // send the notification upstream/downstream
1220                         Worker::add(['priority' => $priority, 'dont_fork' => true], "Notifier", Delivery::DELETION, intval($item['id']));
1221                 } elseif ($item['uid'] != 0) {
1222
1223                         // When we delete just our local user copy of an item, we have to set a marker to hide it
1224                         $global_item = self::selectFirst(['id'], ['uri' => $item['uri'], 'uid' => 0, 'deleted' => false]);
1225                         if (DBA::isResult($global_item)) {
1226                                 DBA::update('user-item', ['hidden' => true], ['iid' => $global_item['id'], 'uid' => $item['uid']], true);
1227                         }
1228                 }
1229
1230                 Logger::log('Item with ID ' . $item_id . " has been deleted.", Logger::DEBUG);
1231
1232                 return true;
1233         }
1234
1235         private static function deleteTagsFromItem($item)
1236         {
1237                 if (($item["verb"] != Activity::TAG) || ($item["object-type"] != Activity\ObjectType::TAGTERM)) {
1238                         return;
1239                 }
1240
1241                 $xo = XML::parseString($item["object"], false);
1242                 $xt = XML::parseString($item["target"], false);
1243
1244                 if ($xt->type != Activity\ObjectType::NOTE) {
1245                         return;
1246                 }
1247
1248                 $i = self::selectFirst(['id', 'contact-id', 'tag'], ['uri' => $xt->id, 'uid' => $item['uid']]);
1249                 if (!DBA::isResult($i)) {
1250                         return;
1251                 }
1252
1253                 // For tags, the owner cannot remove the tag on the author's copy of the post.
1254                 $owner_remove = ($item["contact-id"] == $i["contact-id"]);
1255                 $author_copy = $item["origin"];
1256
1257                 if (($owner_remove && $author_copy) || !$owner_remove) {
1258                         return;
1259                 }
1260
1261                 $tags = explode(',', $i["tag"]);
1262                 $newtags = [];
1263                 if (count($tags)) {
1264                         foreach ($tags as $tag) {
1265                                 if (trim($tag) !== trim($xo->body)) {
1266                                        $newtags[] = trim($tag);
1267                                 }
1268                         }
1269                 }
1270                 self::update(['tag' => implode(',', $newtags)], ['id' => $i["id"]]);
1271         }
1272
1273         private static function guid($item, $notify)
1274         {
1275                 if (!empty($item['guid'])) {
1276                         return Strings::escapeTags(trim($item['guid']));
1277                 }
1278
1279                 if ($notify) {
1280                         // We have to avoid duplicates. So we create the GUID in form of a hash of the plink or uri.
1281                         // We add the hash of our own host because our host is the original creator of the post.
1282                         $prefix_host = \get_app()->getHostName();
1283                 } else {
1284                         $prefix_host = '';
1285
1286                         // We are only storing the post so we create a GUID from the original hostname.
1287                         if (!empty($item['author-link'])) {
1288                                 $parsed = parse_url($item['author-link']);
1289                                 if (!empty($parsed['host'])) {
1290                                         $prefix_host = $parsed['host'];
1291                                 }
1292                         }
1293
1294                         if (empty($prefix_host) && !empty($item['plink'])) {
1295                                 $parsed = parse_url($item['plink']);
1296                                 if (!empty($parsed['host'])) {
1297                                         $prefix_host = $parsed['host'];
1298                                 }
1299                         }
1300
1301                         if (empty($prefix_host) && !empty($item['uri'])) {
1302                                 $parsed = parse_url($item['uri']);
1303                                 if (!empty($parsed['host'])) {
1304                                         $prefix_host = $parsed['host'];
1305                                 }
1306                         }
1307
1308                         // Is it in the format data@host.tld? - Used for mail contacts
1309                         if (empty($prefix_host) && !empty($item['author-link']) && strstr($item['author-link'], '@')) {
1310                                 $mailparts = explode('@', $item['author-link']);
1311                                 $prefix_host = array_pop($mailparts);
1312                         }
1313                 }
1314
1315                 if (!empty($item['plink'])) {
1316                         $guid = self::guidFromUri($item['plink'], $prefix_host);
1317                 } elseif (!empty($item['uri'])) {
1318                         $guid = self::guidFromUri($item['uri'], $prefix_host);
1319                 } else {
1320                         $guid = System::createUUID(hash('crc32', $prefix_host));
1321                 }
1322
1323                 return $guid;
1324         }
1325
1326         private static function contactId($item)
1327         {
1328                 if (!empty($item['contact-id']) && DBA::exists('contact', ['self' => true, 'id' => $item['contact-id']])) {
1329                         return $item['contact-id'];
1330                 } elseif (($item['gravity'] == GRAVITY_PARENT) && !empty($item['uid']) && !empty($item['contact-id']) && Contact::isSharing($item['contact-id'], $item['uid'])) {
1331                         return $item['contact-id'];
1332                 } elseif (!empty($item['uid']) && !Contact::isSharing($item['author-id'], $item['uid'])) {
1333                         return $item['author-id'];
1334                 } elseif (!empty($item['contact-id'])) {
1335                         return $item['contact-id'];
1336                 } else {
1337                         $contact_id = Contact::getIdForURL($item['author-link'], $item['uid']);
1338                         if (!empty($contact_id)) {
1339                                 return $contact_id;
1340                         }
1341                 }
1342                 return $item['author-id'];
1343         }
1344
1345         // This function will finally cover most of the preparation functionality in mod/item.php
1346         public static function prepare(&$item)
1347         {
1348                 /*
1349                  * @TODO: Unused code triggering inspection errors
1350                  *
1351                 $data = BBCode::getAttachmentData($item['body']);
1352                 if ((preg_match_all("/\[bookmark\=([^\]]*)\](.*?)\[\/bookmark\]/ism", $item['body'], $match, PREG_SET_ORDER) || isset($data["type"]))
1353                         && ($posttype != Item::PT_PERSONAL_NOTE)) {
1354                         $posttype = Item::PT_PAGE;
1355                         $objecttype = ACTIVITY_OBJ_BOOKMARK;
1356                 }
1357                  */
1358         }
1359
1360         /**
1361          * Write an item array into a spool file to be inserted later.
1362          * This command is called whenever there are issues storing an item.
1363          *
1364          * @param array $item The item fields that are to be inserted
1365          * @throws \Exception
1366          */
1367         private static function spool($orig_item)
1368         {
1369                 // Now we store the data in the spool directory
1370                 // We use "microtime" to keep the arrival order and "mt_rand" to avoid duplicates
1371                 $file = 'item-' . round(microtime(true) * 10000) . '-' . mt_rand() . '.msg';
1372
1373                 $spoolpath = get_spoolpath();
1374                 if ($spoolpath != "") {
1375                         $spool = $spoolpath . '/' . $file;
1376
1377                         file_put_contents($spool, json_encode($orig_item));
1378                         Logger::warning("Item wasn't stored - Item was spooled into file", ['file' => $file]);
1379                 }
1380         }
1381
1382         public static function insert($item, $force_parent = false, $notify = false, $dontcache = false)
1383         {
1384                 $orig_item = $item;
1385
1386                 $priority = PRIORITY_HIGH;
1387
1388                 // If it is a posting where users should get notifications, then define it as wall posting
1389                 if ($notify) {
1390                         $item['wall'] = 1;
1391                         $item['origin'] = 1;
1392                         $item['network'] = Protocol::DFRN;
1393                         $item['protocol'] = Conversation::PARCEL_DFRN;
1394
1395                         if (is_int($notify)) {
1396                                 $priority = $notify;
1397                         }
1398                 } else {
1399                         $item['network'] = trim(($item['network'] ?? '') ?: Protocol::PHANTOM);
1400                 }
1401
1402                 $item['guid'] = self::guid($item, $notify);
1403                 $item['uri'] = Strings::escapeTags(trim(($item['uri'] ?? '') ?: self::newURI($item['uid'], $item['guid'])));
1404
1405                 // Store URI data
1406                 $item['uri-id'] = ItemURI::insert(['uri' => $item['uri'], 'guid' => $item['guid']]);
1407
1408                 // Store conversation data
1409                 $item = Conversation::insert($item);
1410
1411                 /*
1412                  * If a Diaspora signature structure was passed in, pull it out of the
1413                  * item array and set it aside for later storage.
1414                  */
1415
1416                 $dsprsig = null;
1417                 if (isset($item['dsprsig'])) {
1418                         $encoded_signature = $item['dsprsig'];
1419                         $dsprsig = json_decode(base64_decode($item['dsprsig']));
1420                         unset($item['dsprsig']);
1421                 }
1422
1423                 $diaspora_signed_text = '';
1424                 if (isset($item['diaspora_signed_text'])) {
1425                         $diaspora_signed_text = $item['diaspora_signed_text'];
1426                         unset($item['diaspora_signed_text']);
1427                 }
1428
1429                 // Converting the plink
1430                 /// @TODO Check if this is really still needed
1431                 if ($item['network'] == Protocol::OSTATUS) {
1432                         if (isset($item['plink'])) {
1433                                 $item['plink'] = OStatus::convertHref($item['plink']);
1434                         } elseif (isset($item['uri'])) {
1435                                 $item['plink'] = OStatus::convertHref($item['uri']);
1436                         }
1437                 }
1438
1439                 if (!empty($item['thr-parent'])) {
1440                         $item['parent-uri'] = $item['thr-parent'];
1441                 }
1442
1443                 $activity = DI::activity();
1444
1445                 if (isset($item['gravity'])) {
1446                         $item['gravity'] = intval($item['gravity']);
1447                 } elseif ($item['parent-uri'] === $item['uri']) {
1448                         $item['gravity'] = GRAVITY_PARENT;
1449                 } elseif ($activity->match($item['verb'], Activity::POST)) {
1450                         $item['gravity'] = GRAVITY_COMMENT;
1451                 } elseif ($activity->match($item['verb'], Activity::FOLLOW)) {
1452                         $item['gravity'] = GRAVITY_ACTIVITY;
1453                 } else {
1454                         $item['gravity'] = GRAVITY_UNKNOWN;   // Should not happen
1455                         Logger::log('Unknown gravity for verb: ' . $item['verb'], Logger::DEBUG);
1456                 }
1457
1458                 $uid = intval($item['uid']);
1459
1460                 // check for create date and expire time
1461                 $expire_interval = Config::get('system', 'dbclean-expire-days', 0);
1462
1463                 $user = DBA::selectFirst('user', ['expire'], ['uid' => $uid]);
1464                 if (DBA::isResult($user) && ($user['expire'] > 0) && (($user['expire'] < $expire_interval) || ($expire_interval == 0))) {
1465                         $expire_interval = $user['expire'];
1466                 }
1467
1468                 if (($expire_interval > 0) && !empty($item['created'])) {
1469                         $expire_date = time() - ($expire_interval * 86400);
1470                         $created_date = strtotime($item['created']);
1471                         if ($created_date < $expire_date) {
1472                                 Logger::notice('Item created before expiration interval.', [
1473                                         'created' => date('c', $created_date),
1474                                         'expired' => date('c', $expire_date),
1475                                         '$item' => $item
1476                                 ]);
1477                                 return 0;
1478                         }
1479                 }
1480
1481                 /*
1482                  * Do we already have this item?
1483                  * We have to check several networks since Friendica posts could be repeated
1484                  * via OStatus (maybe Diasporsa as well)
1485                  */
1486                 if (empty($item['network']) || in_array($item['network'], Protocol::FEDERATED)) {
1487                         $condition = ["`uri` = ? AND `uid` = ? AND `network` IN (?, ?, ?, ?)",
1488                                 trim($item['uri']), $item['uid'],
1489                                 Protocol::ACTIVITYPUB, Protocol::DIASPORA, Protocol::DFRN, Protocol::OSTATUS];
1490                         $existing = self::selectFirst(['id', 'network'], $condition);
1491                         if (DBA::isResult($existing)) {
1492                                 // We only log the entries with a different user id than 0. Otherwise we would have too many false positives
1493                                 if ($uid != 0) {
1494                                         Logger::notice('Item already existed for user', [
1495                                                 'uri' => $item['uri'],
1496                                                 'uid' => $uid,
1497                                                 'network' => $item['network'],
1498                                                 'existing_id' => $existing["id"],
1499                                                 'existing_network' => $existing["network"]
1500                                         ]);
1501                                 }
1502
1503                                 return $existing["id"];
1504                         }
1505                 }
1506
1507                 $item['wall']          = intval($item['wall'] ?? 0);
1508                 $item['extid']         = trim($item['extid'] ?? '');
1509                 $item['author-name']   = trim($item['author-name'] ?? '');
1510                 $item['author-link']   = trim($item['author-link'] ?? '');
1511                 $item['author-avatar'] = trim($item['author-avatar'] ?? '');
1512                 $item['owner-name']    = trim($item['owner-name'] ?? '');
1513                 $item['owner-link']    = trim($item['owner-link'] ?? '');
1514                 $item['owner-avatar']  = trim($item['owner-avatar'] ?? '');
1515                 $item['received']      = (isset($item['received'])  ? DateTimeFormat::utc($item['received'])  : DateTimeFormat::utcNow());
1516                 $item['created']       = (isset($item['created'])   ? DateTimeFormat::utc($item['created'])   : $item['received']);
1517                 $item['edited']        = (isset($item['edited'])    ? DateTimeFormat::utc($item['edited'])    : $item['created']);
1518                 $item['changed']       = (isset($item['changed'])   ? DateTimeFormat::utc($item['changed'])   : $item['created']);
1519                 $item['commented']     = (isset($item['commented']) ? DateTimeFormat::utc($item['commented']) : $item['created']);
1520                 $item['title']         = trim($item['title'] ?? '');
1521                 $item['location']      = trim($item['location'] ?? '');
1522                 $item['coord']         = trim($item['coord'] ?? '');
1523                 $item['visible']       = (isset($item['visible']) ? intval($item['visible']) : 1);
1524                 $item['deleted']       = 0;
1525                 $item['parent-uri']    = trim(($item['parent-uri'] ?? '') ?: $item['uri']);
1526                 $item['post-type']     = ($item['post-type'] ?? '') ?: self::PT_ARTICLE;
1527                 $item['verb']          = trim($item['verb'] ?? '');
1528                 $item['object-type']   = trim($item['object-type'] ?? '');
1529                 $item['object']        = trim($item['object'] ?? '');
1530                 $item['target-type']   = trim($item['target-type'] ?? '');
1531                 $item['target']        = trim($item['target'] ?? '');
1532                 $item['plink']         = trim($item['plink'] ?? '');
1533                 $item['allow_cid']     = trim($item['allow_cid'] ?? '');
1534                 $item['allow_gid']     = trim($item['allow_gid'] ?? '');
1535                 $item['deny_cid']      = trim($item['deny_cid'] ?? '');
1536                 $item['deny_gid']      = trim($item['deny_gid'] ?? '');
1537                 $item['private']       = intval($item['private'] ?? 0);
1538                 $item['body']          = trim($item['body'] ?? '');
1539                 $item['tag']           = trim($item['tag'] ?? '');
1540                 $item['attach']        = trim($item['attach'] ?? '');
1541                 $item['app']           = trim($item['app'] ?? '');
1542                 $item['origin']        = intval($item['origin'] ?? 0);
1543                 $item['postopts']      = trim($item['postopts'] ?? '');
1544                 $item['resource-id']   = trim($item['resource-id'] ?? '');
1545                 $item['event-id']      = intval($item['event-id'] ?? 0);
1546                 $item['inform']        = trim($item['inform'] ?? '');
1547                 $item['file']          = trim($item['file'] ?? '');
1548
1549                 // When there is no content then we don't post it
1550                 if ($item['body'].$item['title'] == '') {
1551                         Logger::notice('No body, no title.');
1552                         return 0;
1553                 }
1554
1555                 self::addLanguageToItemArray($item);
1556
1557                 // Items cannot be stored before they happen ...
1558                 if ($item['created'] > DateTimeFormat::utcNow()) {
1559                         $item['created'] = DateTimeFormat::utcNow();
1560                 }
1561
1562                 // We haven't invented time travel by now.
1563                 if ($item['edited'] > DateTimeFormat::utcNow()) {
1564                         $item['edited'] = DateTimeFormat::utcNow();
1565                 }
1566
1567                 $item['plink'] = ($item['plink'] ?? '') ?: System::baseUrl() . '/display/' . urlencode($item['guid']);
1568
1569                 $default = ['url' => $item['author-link'], 'name' => $item['author-name'],
1570                         'photo' => $item['author-avatar'], 'network' => $item['network']];
1571
1572                 $item['author-id'] = ($item['author-id'] ?? 0) ?: Contact::getIdForURL($item['author-link'], 0, false, $default);
1573
1574                 if (Contact::isBlocked($item['author-id'])) {
1575                         Logger::notice('Author is blocked node-wide', ['author-link' => $item['author-link'], 'item-uri' => $item['uri']]);
1576                         return 0;
1577                 }
1578
1579                 if (!empty($item['author-link']) && Network::isUrlBlocked($item['author-link'])) {
1580                         Logger::notice('Author server is blocked', ['author-link' => $item['author-link'], 'item-uri' => $item['uri']]);
1581                         return 0;
1582                 }
1583
1584                 if (!empty($uid) && Contact::isBlockedByUser($item['author-id'], $uid)) {
1585                         Logger::notice('Author is blocked by user', ['author-link' => $item['author-link'], 'uid' => $uid, 'item-uri' => $item['uri']]);
1586                         return 0;
1587                 }
1588
1589                 $default = ['url' => $item['owner-link'], 'name' => $item['owner-name'],
1590                         'photo' => $item['owner-avatar'], 'network' => $item['network']];
1591
1592                 $item['owner-id'] = ($item['owner-id'] ?? 0) ?: Contact::getIdForURL($item['owner-link'], 0, false, $default);
1593
1594                 if (Contact::isBlocked($item['owner-id'])) {
1595                         Logger::notice('Owner is blocked node-wide', ['owner-link' => $item['owner-link'], 'item-uri' => $item['uri']]);
1596                         return 0;
1597                 }
1598
1599                 if (!empty($item['owner-link']) && Network::isUrlBlocked($item['owner-link'])) {
1600                         Logger::notice('Owner server is blocked', ['owner-link' => $item['owner-link'], 'item-uri' => $item['uri']]);
1601                         return 0;
1602                 }
1603
1604                 if (!empty($uid) && Contact::isBlockedByUser($item['owner-id'], $uid)) {
1605                         Logger::notice('Owner is blocked by user', ['owner-link' => $item['owner-link'], 'uid' => $uid, 'item-uri' => $item['uri']]);
1606                         return 0;
1607                 }
1608
1609                 // The causer is set during a thread completion, for example because of a reshare. It countains the responsible actor.
1610                 if (!empty($uid) && !empty($item['causer-id']) && Contact::isBlockedByUser($item['causer-id'], $uid)) {
1611                         Logger::notice('Causer is blocked by user', ['causer-link' => $item['causer-link'], 'uid' => $uid, 'item-uri' => $item['uri']]);
1612                         return 0;
1613                 }
1614
1615                 if (!empty($uid) && !empty($item['causer-id']) && ($item['parent-uri'] == $item['uri']) && Contact::isIgnoredByUser($item['causer-id'], $uid)) {
1616                         Logger::notice('Causer is ignored by user', ['causer-link' => $item['causer-link'], 'uid' => $uid, 'item-uri' => $item['uri']]);
1617                         return 0;
1618                 }
1619
1620                 // We don't store the causer, we only have it here for the checks above
1621                 unset($item['causer-id']);
1622                 unset($item['causer-link']);
1623
1624                 // The contact-id should be set before "self::insert" was called - but there seems to be issues sometimes
1625                 $item["contact-id"] = self::contactId($item);
1626
1627                 if ($item['network'] == Protocol::PHANTOM) {
1628                         $item['network'] = Protocol::DFRN;
1629                         Logger::notice('Missing network, setting to {network}.', [
1630                                 'uri' => $item["uri"],
1631                                 'network' => $item['network'],
1632                                 'callstack' => System::callstack()
1633                         ]);
1634                 }
1635
1636                 // Checking if there is already an item with the same guid
1637                 $condition = ['guid' => $item['guid'], 'network' => $item['network'], 'uid' => $item['uid']];
1638                 if (self::exists($condition)) {
1639                         Logger::notice('Found already existing item', [
1640                                 'guid' => $item['guid'],
1641                                 'uid' => $item['uid'],
1642                                 'network' => $item['network']
1643                         ]);
1644                         return 0;
1645                 }
1646
1647                 if ($item['verb'] == Activity::FOLLOW) {
1648                         if (!$item['origin'] && ($item['author-id'] == Contact::getPublicIdByUserId($uid))) {
1649                                 // Our own follow request can be relayed to us. We don't store it to avoid notification chaos.
1650                                 Logger::log("Follow: Don't store not origin follow request from us for " . $item['parent-uri'], Logger::DEBUG);
1651                                 return 0;
1652                         }
1653
1654                         $condition = ['verb' => Activity::FOLLOW, 'uid' => $item['uid'],
1655                                 'parent-uri' => $item['parent-uri'], 'author-id' => $item['author-id']];
1656                         if (self::exists($condition)) {
1657                                 // It happens that we receive multiple follow requests by the same author - we only store one.
1658                                 Logger::log('Follow: Found existing follow request from author ' . $item['author-id'] . ' for ' . $item['parent-uri'], Logger::DEBUG);
1659                                 return 0;
1660                         }
1661                 }
1662
1663                 // Check for hashtags in the body and repair or add hashtag links
1664                 self::setHashtags($item);
1665
1666                 $item['thr-parent'] = $item['parent-uri'];
1667
1668                 $notify_type = Delivery::POST;
1669                 $allow_cid = '';
1670                 $allow_gid = '';
1671                 $deny_cid  = '';
1672                 $deny_gid  = '';
1673
1674                 if ($item['parent-uri'] === $item['uri']) {
1675                         $parent_id = 0;
1676                         $parent_deleted = 0;
1677                         $allow_cid = $item['allow_cid'];
1678                         $allow_gid = $item['allow_gid'];
1679                         $deny_cid  = $item['deny_cid'];
1680                         $deny_gid  = $item['deny_gid'];
1681                 } else {
1682                         // find the parent and snarf the item id and ACLs
1683                         // and anything else we need to inherit
1684
1685                         $fields = ['uri', 'parent-uri', 'id', 'deleted',
1686                                 'allow_cid', 'allow_gid', 'deny_cid', 'deny_gid',
1687                                 'wall', 'private', 'forum_mode', 'origin'];
1688                         $condition = ['uri' => $item['parent-uri'], 'uid' => $item['uid']];
1689                         $params = ['order' => ['id' => false]];
1690                         $parent = self::selectFirst($fields, $condition, $params);
1691
1692                         if (DBA::isResult($parent)) {
1693                                 // is the new message multi-level threaded?
1694                                 // even though we don't support it now, preserve the info
1695                                 // and re-attach to the conversation parent.
1696
1697                                 if ($parent['uri'] != $parent['parent-uri']) {
1698                                         $item['parent-uri'] = $parent['parent-uri'];
1699
1700                                         $condition = ['uri' => $item['parent-uri'],
1701                                                 'parent-uri' => $item['parent-uri'],
1702                                                 'uid' => $item['uid']];
1703                                         $params = ['order' => ['id' => false]];
1704                                         $toplevel_parent = self::selectFirst($fields, $condition, $params);
1705
1706                                         if (DBA::isResult($toplevel_parent)) {
1707                                                 $parent = $toplevel_parent;
1708                                         }
1709                                 }
1710
1711                                 $parent_id      = $parent['id'];
1712                                 $parent_deleted = $parent['deleted'];
1713                                 $allow_cid      = $parent['allow_cid'];
1714                                 $allow_gid      = $parent['allow_gid'];
1715                                 $deny_cid       = $parent['deny_cid'];
1716                                 $deny_gid       = $parent['deny_gid'];
1717                                 $item['wall']   = $parent['wall'];
1718
1719                                 /*
1720                                  * If the parent is private, force privacy for the entire conversation
1721                                  * This differs from the above settings as it subtly allows comments from
1722                                  * email correspondents to be private even if the overall thread is not.
1723                                  */
1724                                 if ($parent['private']) {
1725                                         $item['private'] = $parent['private'];
1726                                 }
1727
1728                                 /*
1729                                  * Edge case. We host a public forum that was originally posted to privately.
1730                                  * The original author commented, but as this is a comment, the permissions
1731                                  * weren't fixed up so it will still show the comment as private unless we fix it here.
1732                                  */
1733                                 if ((intval($parent['forum_mode']) == 1) && $parent['private']) {
1734                                         $item['private'] = 0;
1735                                 }
1736
1737                                 // If its a post that originated here then tag the thread as "mention"
1738                                 if ($item['origin'] && $item['uid']) {
1739                                         DBA::update('thread', ['mention' => true], ['iid' => $parent_id]);
1740                                         Logger::log('tagged thread ' . $parent_id . ' as mention for user ' . $item['uid'], Logger::DEBUG);
1741                                 }
1742                         } else {
1743                                 /*
1744                                  * Allow one to see reply tweets from status.net even when
1745                                  * we don't have or can't see the original post.
1746                                  */
1747                                 if ($force_parent) {
1748                                         Logger::log('$force_parent=true, reply converted to top-level post.');
1749                                         $parent_id = 0;
1750                                         $item['parent-uri'] = $item['uri'];
1751                                         $item['gravity'] = GRAVITY_PARENT;
1752                                 } else {
1753                                         Logger::log('item parent '.$item['parent-uri'].' for '.$item['uid'].' was not found - ignoring item');
1754                                         return 0;
1755                                 }
1756
1757                                 $parent_deleted = 0;
1758                         }
1759                 }
1760
1761                 if (stristr($item['verb'], Activity::POKE)) {
1762                         $notify_type = Delivery::POKE;
1763                 }
1764
1765                 $item['parent-uri-id'] = ItemURI::getIdByURI($item['parent-uri']);
1766                 $item['thr-parent-id'] = ItemURI::getIdByURI($item['thr-parent']);
1767
1768                 $condition = ["`uri` = ? AND `network` IN (?, ?) AND `uid` = ?",
1769                         $item['uri'], $item['network'], Protocol::DFRN, $item['uid']];
1770                 if (self::exists($condition)) {
1771                         Logger::log('duplicated item with the same uri found. '.print_r($item,true));
1772                         return 0;
1773                 }
1774
1775                 // On Friendica and Diaspora the GUID is unique
1776                 if (in_array($item['network'], [Protocol::DFRN, Protocol::DIASPORA])) {
1777                         $condition = ['guid' => $item['guid'], 'uid' => $item['uid']];
1778                         if (self::exists($condition)) {
1779                                 Logger::log('duplicated item with the same guid found. '.print_r($item,true));
1780                                 return 0;
1781                         }
1782                 } elseif ($item['network'] == Protocol::OSTATUS) {
1783                         // Check for an existing post with the same content. There seems to be a problem with OStatus.
1784                         $condition = ["`body` = ? AND `network` = ? AND `created` = ? AND `contact-id` = ? AND `uid` = ?",
1785                                         $item['body'], $item['network'], $item['created'], $item['contact-id'], $item['uid']];
1786                         if (self::exists($condition)) {
1787                                 Logger::log('duplicated item with the same body found. '.print_r($item,true));
1788                                 return 0;
1789                         }
1790                 }
1791
1792                 // Is this item available in the global items (with uid=0)?
1793                 if ($item["uid"] == 0) {
1794                         $item["global"] = true;
1795
1796                         // Set the global flag on all items if this was a global item entry
1797                         DBA::update('item', ['global' => true], ['uri' => $item["uri"]]);
1798                 } else {
1799                         $item["global"] = self::exists(['uid' => 0, 'uri' => $item["uri"]]);
1800                 }
1801
1802                 // ACL settings
1803                 if (strlen($allow_cid) || strlen($allow_gid) || strlen($deny_cid) || strlen($deny_gid)) {
1804                         $private = 1;
1805                 } else {
1806                         $private = $item['private'];
1807                 }
1808
1809                 $item["allow_cid"] = $allow_cid;
1810                 $item["allow_gid"] = $allow_gid;
1811                 $item["deny_cid"] = $deny_cid;
1812                 $item["deny_gid"] = $deny_gid;
1813                 $item["private"] = $private;
1814                 $item["deleted"] = $parent_deleted;
1815
1816                 // Fill the cache field
1817                 self::putInCache($item);
1818
1819                 if ($notify) {
1820                         $item['edit'] = false;
1821                         $item['parent'] = $parent_id;
1822                         Hook::callAll('post_local', $item);
1823                         unset($item['edit']);
1824                         unset($item['parent']);
1825                 } else {
1826                         Hook::callAll('post_remote', $item);
1827                 }
1828
1829                 // This array field is used to trigger some automatic reactions
1830                 // It is mainly used in the "post_local" hook.
1831                 unset($item['api_source']);
1832
1833                 if (!empty($item['cancel'])) {
1834                         Logger::log('post cancelled by addon.');
1835                         return 0;
1836                 }
1837
1838                 /*
1839                  * Check for already added items.
1840                  * There is a timing issue here that sometimes creates double postings.
1841                  * An unique index would help - but the limitations of MySQL (maximum size of index values) prevent this.
1842                  */
1843                 if ($item["uid"] == 0) {
1844                         if (self::exists(['uri' => trim($item['uri']), 'uid' => 0])) {
1845                                 Logger::log('Global item already stored. URI: '.$item['uri'].' on network '.$item['network'], Logger::DEBUG);
1846                                 return 0;
1847                         }
1848                 }
1849
1850                 Logger::log('' . print_r($item,true), Logger::DATA);
1851
1852                 if (array_key_exists('tag', $item)) {
1853                         $tags = $item['tag'];
1854                         unset($item['tag']);
1855                 } else {
1856                         $tags = '';
1857                 }
1858
1859                 if (array_key_exists('file', $item)) {
1860                         $files = $item['file'];
1861                         unset($item['file']);
1862                 } else {
1863                         $files = '';
1864                 }
1865
1866                 // Creates or assigns the permission set
1867                 $item['psid'] = PermissionSet::fetchIDForPost($item);
1868
1869                 // We are doing this outside of the transaction to avoid timing problems
1870                 if (!self::insertActivity($item)) {
1871                         self::insertContent($item);
1872                 }
1873
1874                 $delivery_data = ItemDeliveryData::extractFields($item);
1875
1876                 unset($item['postopts']);
1877                 unset($item['inform']);
1878
1879                 // These fields aren't stored anymore in the item table, they are fetched upon request
1880                 unset($item['author-link']);
1881                 unset($item['author-name']);
1882                 unset($item['author-avatar']);
1883                 unset($item['author-network']);
1884
1885                 unset($item['owner-link']);
1886                 unset($item['owner-name']);
1887                 unset($item['owner-avatar']);
1888
1889                 $like_no_comment = Config::get('system', 'like_no_comment');
1890
1891                 DBA::transaction();
1892                 $ret = DBA::insert('item', $item);
1893
1894                 // When the item was successfully stored we fetch the ID of the item.
1895                 if (DBA::isResult($ret)) {
1896                         $current_post = DBA::lastInsertId();
1897                 } else {
1898                         // This can happen - for example - if there are locking timeouts.
1899                         DBA::rollback();
1900
1901                         // Store the data into a spool file so that we can try again later.
1902                         self::spool($orig_item);
1903                         return 0;
1904                 }
1905
1906                 if ($current_post == 0) {
1907                         // This is one of these error messages that never should occur.
1908                         Logger::log("couldn't find created item - we better quit now.");
1909                         DBA::rollback();
1910                         return 0;
1911                 }
1912
1913                 // How much entries have we created?
1914                 // We wouldn't need this query when we could use an unique index - but MySQL has length problems with them.
1915                 $entries = DBA::count('item', ['uri' => $item['uri'], 'uid' => $item['uid'], 'network' => $item['network']]);
1916
1917                 if ($entries > 1) {
1918                         // There are duplicates. We delete our just created entry.
1919                         Logger::log('Duplicated post occurred. uri = ' . $item['uri'] . ' uid = ' . $item['uid']);
1920
1921                         // Yes, we could do a rollback here - but we are having many users with MyISAM.
1922                         DBA::delete('item', ['id' => $current_post]);
1923                         DBA::commit();
1924                         return 0;
1925                 } elseif ($entries == 0) {
1926                         // This really should never happen since we quit earlier if there were problems.
1927                         Logger::log("Something is terribly wrong. We haven't found our created entry.");
1928                         DBA::rollback();
1929                         return 0;
1930                 }
1931
1932                 Logger::log('created item '.$current_post);
1933
1934                 if (!$parent_id || ($item['parent-uri'] === $item['uri'])) {
1935                         $parent_id = $current_post;
1936                 }
1937
1938                 // Set parent id
1939                 DBA::update('item', ['parent' => $parent_id], ['id' => $current_post]);
1940
1941                 $item['id'] = $current_post;
1942                 $item['parent'] = $parent_id;
1943
1944                 // update the commented timestamp on the parent
1945                 // Only update "commented" if it is really a comment
1946                 if (($item['gravity'] != GRAVITY_ACTIVITY) || !$like_no_comment) {
1947                         DBA::update('item', ['commented' => DateTimeFormat::utcNow(), 'changed' => DateTimeFormat::utcNow()], ['id' => $parent_id]);
1948                 } else {
1949                         DBA::update('item', ['changed' => DateTimeFormat::utcNow()], ['id' => $parent_id]);
1950                 }
1951
1952                 if ($dsprsig) {
1953                         /*
1954                          * Friendica servers lower than 3.4.3-2 had double encoded the signature ...
1955                          * We can check for this condition when we decode and encode the stuff again.
1956                          */
1957                         if (base64_encode(base64_decode(base64_decode($dsprsig->signature))) == base64_decode($dsprsig->signature)) {
1958                                 $dsprsig->signature = base64_decode($dsprsig->signature);
1959                                 Logger::log("Repaired double encoded signature from handle ".$dsprsig->signer, Logger::DEBUG);
1960                         }
1961
1962                         if (!empty($dsprsig->signed_text) && empty($dsprsig->signature) && empty($dsprsig->signer)) {
1963                                 DBA::insert('diaspora-interaction', ['uri-id' => $item['uri-id'], 'interaction' => $dsprsig->signed_text], true);
1964                         } else {
1965                                 // The other fields are used by very old Friendica servers, so we currently store them differently
1966                                 DBA::insert('sign', ['iid' => $current_post, 'signed_text' => $dsprsig->signed_text,
1967                                         'signature' => $dsprsig->signature, 'signer' => $dsprsig->signer]);
1968                         }
1969                 }
1970
1971                 if (!empty($diaspora_signed_text)) {
1972                         DBA::insert('diaspora-interaction', ['uri-id' => $item['uri-id'], 'interaction' => $diaspora_signed_text], true);
1973                 }
1974
1975                 if ($item['parent-uri'] === $item['uri']) {
1976                         self::addThread($current_post);
1977                 } else {
1978                         self::updateThread($parent_id);
1979                 }
1980
1981                 if (!empty($item['origin']) || !empty($item['wall']) || !empty($delivery_data['postopts']) || !empty($delivery_data['inform'])) {
1982                         ItemDeliveryData::insert($current_post, $delivery_data);
1983                 }
1984
1985                 DBA::commit();
1986
1987                 /*
1988                  * Due to deadlock issues with the "term" table we are doing these steps after the commit.
1989                  * This is not perfect - but a workable solution until we found the reason for the problem.
1990                  */
1991                 if (!empty($tags)) {
1992                         Term::insertFromTagFieldByItemId($current_post, $tags);
1993                 }
1994
1995                 if (!empty($files)) {
1996                         Term::insertFromFileFieldByItemId($current_post, $files);
1997                 }
1998
1999                 // In that function we check if this is a forum post. Additionally we delete the item under certain circumstances
2000                 if (self::tagDeliver($item['uid'], $current_post)) {
2001                         // Get the user information for the logging
2002                         $user = User::getById($uid);
2003
2004                         Logger::notice('Item had been deleted', ['id' => $current_post, 'user' => $uid, 'account-type' => $user['account-type']]);
2005                         return 0;
2006                 }
2007
2008                 if (!$dontcache) {
2009                         $posted_item = self::selectFirst(self::ITEM_FIELDLIST, ['id' => $current_post]);
2010                         if (DBA::isResult($posted_item)) {
2011                                 if ($notify) {
2012                                         Hook::callAll('post_local_end', $posted_item);
2013                                 } else {
2014                                         Hook::callAll('post_remote_end', $posted_item);
2015                                 }
2016                         } else {
2017                                 Logger::log('new item not found in DB, id ' . $current_post);
2018                         }
2019                 }
2020
2021                 if ($item['parent-uri'] === $item['uri']) {
2022                         self::addShadow($current_post);
2023                 } else {
2024                         self::addShadowPost($current_post);
2025                 }
2026
2027                 self::updateContact($item);
2028
2029                 check_user_notification($current_post);
2030
2031                 if ($notify || ($item['visible'] && ((!empty($parent) && $parent['origin']) || $item['origin']))) {
2032                         Worker::add(['priority' => $priority, 'dont_fork' => true], 'Notifier', $notify_type, $current_post);
2033                 }
2034
2035                 return $current_post;
2036         }
2037
2038         /**
2039          * @brief Insert a new item content entry
2040          *
2041          * @param array $item The item fields that are to be inserted
2042          * @return bool
2043          * @throws \Exception
2044          */
2045         private static function insertActivity(&$item)
2046         {
2047                 $activity_index = self::activityToIndex($item['verb']);
2048
2049                 if ($activity_index < 0) {
2050                         return false;
2051                 }
2052
2053                 $fields = ['activity' => $activity_index, 'uri-hash' => (string)$item['uri-id'], 'uri-id' => $item['uri-id']];
2054
2055                 // We just remove everything that is content
2056                 foreach (array_merge(self::CONTENT_FIELDLIST, self::MIXED_CONTENT_FIELDLIST) as $field) {
2057                         unset($item[$field]);
2058                 }
2059
2060                 // To avoid timing problems, we are using locks.
2061                 $locked = Lock::acquire('item_insert_activity');
2062                 if (!$locked) {
2063                         Logger::log("Couldn't acquire lock for URI " . $item['uri'] . " - proceeding anyway.");
2064                 }
2065
2066                 // Do we already have this content?
2067                 $item_activity = DBA::selectFirst('item-activity', ['id'], ['uri-id' => $item['uri-id']]);
2068                 if (DBA::isResult($item_activity)) {
2069                         $item['iaid'] = $item_activity['id'];
2070                         Logger::log('Fetched activity for URI ' . $item['uri'] . ' (' . $item['iaid'] . ')');
2071                 } elseif (DBA::insert('item-activity', $fields)) {
2072                         $item['iaid'] = DBA::lastInsertId();
2073                         Logger::log('Inserted activity for URI ' . $item['uri'] . ' (' . $item['iaid'] . ')');
2074                 } else {
2075                         // This shouldn't happen.
2076                         Logger::log('Could not insert activity for URI ' . $item['uri'] . ' - should not happen');
2077                         Lock::release('item_insert_activity');
2078                         return false;
2079                 }
2080                 if ($locked) {
2081                         Lock::release('item_insert_activity');
2082                 }
2083                 return true;
2084         }
2085
2086         /**
2087          * @brief Insert a new item content entry
2088          *
2089          * @param array $item The item fields that are to be inserted
2090          * @throws \Exception
2091          */
2092         private static function insertContent(&$item)
2093         {
2094                 $fields = ['uri-plink-hash' => (string)$item['uri-id'], 'uri-id' => $item['uri-id']];
2095
2096                 foreach (array_merge(self::CONTENT_FIELDLIST, self::MIXED_CONTENT_FIELDLIST) as $field) {
2097                         if (isset($item[$field])) {
2098                                 $fields[$field] = $item[$field];
2099                                 unset($item[$field]);
2100                         }
2101                 }
2102
2103                 // To avoid timing problems, we are using locks.
2104                 $locked = Lock::acquire('item_insert_content');
2105                 if (!$locked) {
2106                         Logger::log("Couldn't acquire lock for URI " . $item['uri'] . " - proceeding anyway.");
2107                 }
2108
2109                 // Do we already have this content?
2110                 $item_content = DBA::selectFirst('item-content', ['id'], ['uri-id' => $item['uri-id']]);
2111                 if (DBA::isResult($item_content)) {
2112                         $item['icid'] = $item_content['id'];
2113                         Logger::log('Fetched content for URI ' . $item['uri'] . ' (' . $item['icid'] . ')');
2114                 } elseif (DBA::insert('item-content', $fields)) {
2115                         $item['icid'] = DBA::lastInsertId();
2116                         Logger::log('Inserted content for URI ' . $item['uri'] . ' (' . $item['icid'] . ')');
2117                 } else {
2118                         // This shouldn't happen.
2119                         Logger::log('Could not insert content for URI ' . $item['uri'] . ' - should not happen');
2120                 }
2121                 if ($locked) {
2122                         Lock::release('item_insert_content');
2123                 }
2124         }
2125
2126         /**
2127          * @brief Update existing item content entries
2128          *
2129          * @param array $item      The item fields that are to be changed
2130          * @param array $condition The condition for finding the item content entries
2131          * @return bool
2132          * @throws \Exception
2133          */
2134         private static function updateActivity($item, $condition)
2135         {
2136                 if (empty($item['verb'])) {
2137                         return false;
2138                 }
2139                 $activity_index = self::activityToIndex($item['verb']);
2140
2141                 if ($activity_index < 0) {
2142                         return false;
2143                 }
2144
2145                 $fields = ['activity' => $activity_index];
2146
2147                 Logger::log('Update activity for ' . json_encode($condition));
2148
2149                 DBA::update('item-activity', $fields, $condition, true);
2150
2151                 return true;
2152         }
2153
2154         /**
2155          * @brief Update existing item content entries
2156          *
2157          * @param array $item      The item fields that are to be changed
2158          * @param array $condition The condition for finding the item content entries
2159          * @throws \Exception
2160          */
2161         private static function updateContent($item, $condition)
2162         {
2163                 // We have to select only the fields from the "item-content" table
2164                 $fields = [];
2165                 foreach (array_merge(self::CONTENT_FIELDLIST, self::MIXED_CONTENT_FIELDLIST) as $field) {
2166                         if (isset($item[$field])) {
2167                                 $fields[$field] = $item[$field];
2168                         }
2169                 }
2170
2171                 if (empty($fields)) {
2172                         // when there are no fields at all, just use the condition
2173                         // This is to ensure that we always store content.
2174                         $fields = $condition;
2175                 }
2176
2177                 Logger::log('Update content for ' . json_encode($condition));
2178
2179                 DBA::update('item-content', $fields, $condition, true);
2180         }
2181
2182         /**
2183          * @brief Distributes public items to the receivers
2184          *
2185          * @param integer $itemid      Item ID that should be added
2186          * @param string  $signed_text Original text (for Diaspora signatures), JSON encoded.
2187          * @throws \Exception
2188          */
2189         public static function distribute($itemid, $signed_text = '')
2190         {
2191                 $condition = ["`id` IN (SELECT `parent` FROM `item` WHERE `id` = ?)", $itemid];
2192                 $parent = self::selectFirst(['owner-id'], $condition);
2193                 if (!DBA::isResult($parent)) {
2194                         return;
2195                 }
2196
2197                 // Only distribute public items from native networks
2198                 $condition = ['id' => $itemid, 'uid' => 0,
2199                         'network' => array_merge(Protocol::FEDERATED ,['']),
2200                         'visible' => true, 'deleted' => false, 'moderated' => false, 'private' => false];
2201                 $item = self::selectFirst(self::ITEM_FIELDLIST, $condition);
2202                 if (!DBA::isResult($item)) {
2203                         return;
2204                 }
2205
2206                 $origin = $item['origin'];
2207
2208                 unset($item['id']);
2209                 unset($item['parent']);
2210                 unset($item['mention']);
2211                 unset($item['wall']);
2212                 unset($item['origin']);
2213                 unset($item['starred']);
2214
2215                 $users = [];
2216
2217                 /// @todo add a field "pcid" in the contact table that referrs to the public contact id.
2218                 $owner = DBA::selectFirst('contact', ['url', 'nurl', 'alias'], ['id' => $parent['owner-id']]);
2219                 if (!DBA::isResult($owner)) {
2220                         return;
2221                 }
2222
2223                 $condition = ['nurl' => $owner['nurl'], 'rel' => [Contact::SHARING, Contact::FRIEND]];
2224                 $contacts = DBA::select('contact', ['uid'], $condition);
2225                 while ($contact = DBA::fetch($contacts)) {
2226                         if ($contact['uid'] == 0) {
2227                                 continue;
2228                         }
2229
2230                         $users[$contact['uid']] = $contact['uid'];
2231                 }
2232                 DBA::close($contacts);
2233
2234                 $condition = ['alias' => $owner['url'], 'rel' => [Contact::SHARING, Contact::FRIEND]];
2235                 $contacts = DBA::select('contact', ['uid'], $condition);
2236                 while ($contact = DBA::fetch($contacts)) {
2237                         if ($contact['uid'] == 0) {
2238                                 continue;
2239                         }
2240
2241                         $users[$contact['uid']] = $contact['uid'];
2242                 }
2243                 DBA::close($contacts);
2244
2245                 if (!empty($owner['alias'])) {
2246                         $condition = ['url' => $owner['alias'], 'rel' => [Contact::SHARING, Contact::FRIEND]];
2247                         $contacts = DBA::select('contact', ['uid'], $condition);
2248                         while ($contact = DBA::fetch($contacts)) {
2249                                 if ($contact['uid'] == 0) {
2250                                         continue;
2251                                 }
2252
2253                                 $users[$contact['uid']] = $contact['uid'];
2254                         }
2255                         DBA::close($contacts);
2256                 }
2257
2258                 $origin_uid = 0;
2259
2260                 if ($item['uri'] != $item['parent-uri']) {
2261                         $parents = self::select(['uid', 'origin'], ["`uri` = ? AND `uid` != 0", $item['parent-uri']]);
2262                         while ($parent = self::fetch($parents)) {
2263                                 $users[$parent['uid']] = $parent['uid'];
2264                                 if ($parent['origin'] && !$origin) {
2265                                         $origin_uid = $parent['uid'];
2266                                 }
2267                         }
2268                 }
2269
2270                 foreach ($users as $uid) {
2271                         if ($origin_uid == $uid) {
2272                                 $item['diaspora_signed_text'] = $signed_text;
2273                         }
2274                         self::storeForUser($itemid, $item, $uid);
2275                 }
2276         }
2277
2278         /**
2279          * @brief Store public items for the receivers
2280          *
2281          * @param integer $itemid Item ID that should be added
2282          * @param array   $item   The item entry that will be stored
2283          * @param integer $uid    The user that will receive the item entry
2284          * @throws \Exception
2285          */
2286         private static function storeForUser($itemid, $item, $uid)
2287         {
2288                 $item['uid'] = $uid;
2289                 $item['origin'] = 0;
2290                 $item['wall'] = 0;
2291                 if ($item['uri'] == $item['parent-uri']) {
2292                         $item['contact-id'] = Contact::getIdForURL($item['owner-link'], $uid);
2293                 } else {
2294                         $item['contact-id'] = Contact::getIdForURL($item['author-link'], $uid);
2295                 }
2296
2297                 if (empty($item['contact-id'])) {
2298                         $self = DBA::selectFirst('contact', ['id'], ['self' => true, 'uid' => $uid]);
2299                         if (!DBA::isResult($self)) {
2300                                 return;
2301                         }
2302                         $item['contact-id'] = $self['id'];
2303                 }
2304
2305                 /// @todo Handling of "event-id"
2306
2307                 $notify = false;
2308                 if ($item['uri'] == $item['parent-uri']) {
2309                         $contact = DBA::selectFirst('contact', [], ['id' => $item['contact-id'], 'self' => false]);
2310                         if (DBA::isResult($contact)) {
2311                                 $notify = self::isRemoteSelf($contact, $item);
2312                         }
2313                 }
2314
2315                 $distributed = self::insert($item, false, $notify, true);
2316
2317                 if (!$distributed) {
2318                         Logger::log("Distributed public item " . $itemid . " for user " . $uid . " wasn't stored", Logger::DEBUG);
2319                 } else {
2320                         Logger::log("Distributed public item " . $itemid . " for user " . $uid . " with id " . $distributed, Logger::DEBUG);
2321                 }
2322         }
2323
2324         /**
2325          * @brief Add a shadow entry for a given item id that is a thread starter
2326          *
2327          * We store every public item entry additionally with the user id "0".
2328          * This is used for the community page and for the search.
2329          * It is planned that in the future we will store public item entries only once.
2330          *
2331          * @param integer $itemid Item ID that should be added
2332          * @throws \Exception
2333          */
2334         public static function addShadow($itemid)
2335         {
2336                 $fields = ['uid', 'private', 'moderated', 'visible', 'deleted', 'network', 'uri'];
2337                 $condition = ['id' => $itemid, 'parent' => [0, $itemid]];
2338                 $item = self::selectFirst($fields, $condition);
2339
2340                 if (!DBA::isResult($item)) {
2341                         return;
2342                 }
2343
2344                 // is it already a copy?
2345                 if (($itemid == 0) || ($item['uid'] == 0)) {
2346                         return;
2347                 }
2348
2349                 // Is it a visible public post?
2350                 if (!$item["visible"] || $item["deleted"] || $item["moderated"] || $item["private"]) {
2351                         return;
2352                 }
2353
2354                 // is it an entry from a connector? Only add an entry for natively connected networks
2355                 if (!in_array($item["network"], array_merge(Protocol::FEDERATED ,['']))) {
2356                         return;
2357                 }
2358
2359                 if (self::exists(['uri' => $item['uri'], 'uid' => 0])) {
2360                         return;
2361                 }
2362
2363                 $item = self::selectFirst(self::ITEM_FIELDLIST, ['id' => $itemid]);
2364
2365                 if (DBA::isResult($item)) {
2366                         // Preparing public shadow (removing user specific data)
2367                         $item['uid'] = 0;
2368                         unset($item['id']);
2369                         unset($item['parent']);
2370                         unset($item['wall']);
2371                         unset($item['mention']);
2372                         unset($item['origin']);
2373                         unset($item['starred']);
2374                         unset($item['postopts']);
2375                         unset($item['inform']);
2376                         if ($item['uri'] == $item['parent-uri']) {
2377                                 $item['contact-id'] = $item['owner-id'];
2378                         } else {
2379                                 $item['contact-id'] = $item['author-id'];
2380                         }
2381
2382                         $public_shadow = self::insert($item, false, false, true);
2383
2384                         Logger::log("Stored public shadow for thread ".$itemid." under id ".$public_shadow, Logger::DEBUG);
2385                 }
2386         }
2387
2388         /**
2389          * @brief Add a shadow entry for a given item id that is a comment
2390          *
2391          * This function does the same like the function above - but for comments
2392          *
2393          * @param integer $itemid Item ID that should be added
2394          * @throws \Exception
2395          */
2396         public static function addShadowPost($itemid)
2397         {
2398                 $item = self::selectFirst(self::ITEM_FIELDLIST, ['id' => $itemid]);
2399                 if (!DBA::isResult($item)) {
2400                         return;
2401                 }
2402
2403                 // Is it a toplevel post?
2404                 if ($item['id'] == $item['parent']) {
2405                         self::addShadow($itemid);
2406                         return;
2407                 }
2408
2409                 // Is this a shadow entry?
2410                 if ($item['uid'] == 0) {
2411                         return;
2412                 }
2413
2414                 // Is there a shadow parent?
2415                 if (!self::exists(['uri' => $item['parent-uri'], 'uid' => 0])) {
2416                         return;
2417                 }
2418
2419                 // Is there already a shadow entry?
2420                 if (self::exists(['uri' => $item['uri'], 'uid' => 0])) {
2421                         return;
2422                 }
2423
2424                 // Save "origin" and "parent" state
2425                 $origin = $item['origin'];
2426                 $parent = $item['parent'];
2427
2428                 // Preparing public shadow (removing user specific data)
2429                 $item['uid'] = 0;
2430                 unset($item['id']);
2431                 unset($item['parent']);
2432                 unset($item['wall']);
2433                 unset($item['mention']);
2434                 unset($item['origin']);
2435                 unset($item['starred']);
2436                 unset($item['postopts']);
2437                 unset($item['inform']);
2438                 $item['contact-id'] = Contact::getIdForURL($item['author-link']);
2439
2440                 $public_shadow = self::insert($item, false, false, true);
2441
2442                 Logger::log("Stored public shadow for comment ".$item['uri']." under id ".$public_shadow, Logger::DEBUG);
2443
2444                 // If this was a comment to a Diaspora post we don't get our comment back.
2445                 // This means that we have to distribute the comment by ourselves.
2446                 if ($origin && self::exists(['id' => $parent, 'network' => Protocol::DIASPORA])) {
2447                         self::distribute($public_shadow);
2448                 }
2449         }
2450
2451         /**
2452          * Adds a language specification in a "language" element of given $arr.
2453          * Expects "body" element to exist in $arr.
2454          *
2455          * @param $item
2456          * @throws \Text_LanguageDetect_Exception
2457          */
2458         private static function addLanguageToItemArray(&$item)
2459         {
2460                 $naked_body = BBCode::toPlaintext($item['body'], false);
2461
2462                 $ld = new Text_LanguageDetect();
2463                 $ld->setNameMode(2);
2464                 $languages = $ld->detect($naked_body, 3);
2465
2466                 if (is_array($languages)) {
2467                         $item['language'] = json_encode($languages);
2468                 }
2469         }
2470
2471         /**
2472          * @brief Creates an unique guid out of a given uri
2473          *
2474          * @param string $uri uri of an item entry
2475          * @param string $host hostname for the GUID prefix
2476          * @return string unique guid
2477          */
2478         public static function guidFromUri($uri, $host)
2479         {
2480                 // Our regular guid routine is using this kind of prefix as well
2481                 // We have to avoid that different routines could accidentally create the same value
2482                 $parsed = parse_url($uri);
2483
2484                 // We use a hash of the hostname as prefix for the guid
2485                 $guid_prefix = hash("crc32", $host);
2486
2487                 // Remove the scheme to make sure that "https" and "http" doesn't make a difference
2488                 unset($parsed["scheme"]);
2489
2490                 // Glue it together to be able to make a hash from it
2491                 $host_id = implode("/", $parsed);
2492
2493                 // We could use any hash algorithm since it isn't a security issue
2494                 $host_hash = hash("ripemd128", $host_id);
2495
2496                 return $guid_prefix.$host_hash;
2497         }
2498
2499         /**
2500          * generate an unique URI
2501          *
2502          * @param integer $uid  User id
2503          * @param string  $guid An existing GUID (Otherwise it will be generated)
2504          *
2505          * @return string
2506          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
2507          */
2508         public static function newURI($uid, $guid = "")
2509         {
2510                 if ($guid == "") {
2511                         $guid = System::createUUID();
2512                 }
2513
2514                 return DI::app()->getBaseURL() . '/objects/' . $guid;
2515         }
2516
2517         /**
2518          * @brief Set "success_update" and "last-item" to the date of the last time we heard from this contact
2519          *
2520          * This can be used to filter for inactive contacts.
2521          * Only do this for public postings to avoid privacy problems, since poco data is public.
2522          * Don't set this value if it isn't from the owner (could be an author that we don't know)
2523          *
2524          * @param array $arr Contains the just posted item record
2525          * @throws \Exception
2526          */
2527         private static function updateContact($arr)
2528         {
2529                 // Unarchive the author
2530                 $contact = DBA::selectFirst('contact', [], ['id' => $arr["author-id"]]);
2531                 if (DBA::isResult($contact)) {
2532                         Contact::unmarkForArchival($contact);
2533                 }
2534
2535                 // Unarchive the contact if it's not our own contact
2536                 $contact = DBA::selectFirst('contact', [], ['id' => $arr["contact-id"], 'self' => false]);
2537                 if (DBA::isResult($contact)) {
2538                         Contact::unmarkForArchival($contact);
2539                 }
2540
2541                 $update = (!$arr['private'] && ((($arr['author-link'] ?? '') === ($arr['owner-link'] ?? '')) || ($arr["parent-uri"] === $arr["uri"])));
2542
2543                 // Is it a forum? Then we don't care about the rules from above
2544                 if (!$update && in_array($arr["network"], [Protocol::ACTIVITYPUB, Protocol::DFRN]) && ($arr["parent-uri"] === $arr["uri"])) {
2545                         if (DBA::exists('contact', ['id' => $arr['contact-id'], 'forum' => true])) {
2546                                 $update = true;
2547                         }
2548                 }
2549
2550                 if ($update) {
2551                         DBA::update('contact', ['success_update' => $arr['received'], 'last-item' => $arr['received']],
2552                                 ['id' => $arr['contact-id']]);
2553                 }
2554                 // Now do the same for the system wide contacts with uid=0
2555                 if (!$arr['private']) {
2556                         DBA::update('contact', ['success_update' => $arr['received'], 'last-item' => $arr['received']],
2557                                 ['id' => $arr['owner-id']]);
2558
2559                         if ($arr['owner-id'] != $arr['author-id']) {
2560                                 DBA::update('contact', ['success_update' => $arr['received'], 'last-item' => $arr['received']],
2561                                         ['id' => $arr['author-id']]);
2562                         }
2563                 }
2564         }
2565
2566         public static function setHashtags(&$item)
2567         {
2568                 $tags = BBCode::getTags($item["body"]);
2569
2570                 // No hashtags?
2571                 if (!count($tags)) {
2572                         return false;
2573                 }
2574
2575                 // What happens in [code], stays in [code]!
2576                 // escape the # and the [
2577                 // hint: we will also get in trouble with #tags, when we want markdown in posts -> ### Headline 3
2578                 $item["body"] = preg_replace_callback("/\[code(.*?)\](.*?)\[\/code\]/ism",
2579                         function ($match) {
2580                                 // we truly ESCape all # and [ to prevent gettin weird tags in [code] blocks
2581                                 $find = ['#', '['];
2582                                 $replace = [chr(27).'sharp', chr(27).'leftsquarebracket'];
2583                                 return ("[code" . $match[1] . "]" . str_replace($find, $replace, $match[2]) . "[/code]");
2584                         }, $item["body"]);
2585
2586                 // This sorting is important when there are hashtags that are part of other hashtags
2587                 // Otherwise there could be problems with hashtags like #test and #test2
2588                 rsort($tags);
2589
2590                 $URLSearchString = "^\[\]";
2591
2592                 // All hashtags should point to the home server if "local_tags" is activated
2593                 if (Config::get('system', 'local_tags')) {
2594                         $item["body"] = preg_replace("/#\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",
2595                                         "#[url=".System::baseUrl()."/search?tag=$2]$2[/url]", $item["body"]);
2596
2597                         $item["tag"] = preg_replace("/#\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",
2598                                         "#[url=".System::baseUrl()."/search?tag=$2]$2[/url]", $item["tag"]);
2599                 }
2600
2601                 // mask hashtags inside of url, bookmarks and attachments to avoid urls in urls
2602                 $item["body"] = preg_replace_callback("/\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",
2603                         function ($match) {
2604                                 return ("[url=" . str_replace("#", "&num;", $match[1]) . "]" . str_replace("#", "&num;", $match[2]) . "[/url]");
2605                         }, $item["body"]);
2606
2607                 $item["body"] = preg_replace_callback("/\[bookmark\=([$URLSearchString]*)\](.*?)\[\/bookmark\]/ism",
2608                         function ($match) {
2609                                 return ("[bookmark=" . str_replace("#", "&num;", $match[1]) . "]" . str_replace("#", "&num;", $match[2]) . "[/bookmark]");
2610                         }, $item["body"]);
2611
2612                 $item["body"] = preg_replace_callback("/\[attachment (.*)\](.*?)\[\/attachment\]/ism",
2613                         function ($match) {
2614                                 return ("[attachment " . str_replace("#", "&num;", $match[1]) . "]" . $match[2] . "[/attachment]");
2615                         }, $item["body"]);
2616
2617                 // Repair recursive urls
2618                 $item["body"] = preg_replace("/&num;\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",
2619                                 "&num;$2", $item["body"]);
2620
2621                 foreach ($tags as $tag) {
2622                         if ((strpos($tag, '#') !== 0) || strpos($tag, '[url=') || strlen($tag) < 2 || $tag[1] == '#') {
2623                                 continue;
2624                         }
2625
2626                         $basetag = str_replace('_',' ',substr($tag,1));
2627                         $newtag = '#[url=' . System::baseUrl() . '/search?tag=' . $basetag . ']' . $basetag . '[/url]';
2628
2629                         $item["body"] = str_replace($tag, $newtag, $item["body"]);
2630
2631                         if (!stristr($item["tag"], "/search?tag=" . $basetag . "]" . $basetag . "[/url]")) {
2632                                 if (strlen($item["tag"])) {
2633                                         $item["tag"] = ',' . $item["tag"];
2634                                 }
2635                                 $item["tag"] = $newtag . $item["tag"];
2636                         }
2637                 }
2638
2639                 // Convert back the masked hashtags
2640                 $item["body"] = str_replace("&num;", "#", $item["body"]);
2641
2642                 // Remember! What happens in [code], stays in [code]
2643                 // roleback the # and [
2644                 $item["body"] = preg_replace_callback("/\[code(.*?)\](.*?)\[\/code\]/ism",
2645                         function ($match) {
2646                                 // we truly unESCape all sharp and leftsquarebracket
2647                                 $find = [chr(27).'sharp', chr(27).'leftsquarebracket'];
2648                                 $replace = ['#', '['];
2649                                 return ("[code" . $match[1] . "]" . str_replace($find, $replace, $match[2]) . "[/code]");
2650                         }, $item["body"]);
2651         }
2652
2653         /**
2654          * look for mention tags and setup a second delivery chain for forum/community posts if appropriate
2655          *
2656          * @param int $uid
2657          * @param int $item_id
2658          * @return boolean true if item was deleted, else false
2659          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
2660          * @throws \ImagickException
2661          */
2662         private static function tagDeliver($uid, $item_id)
2663         {
2664                 $mention = false;
2665
2666                 $user = DBA::selectFirst('user', [], ['uid' => $uid]);
2667                 if (!DBA::isResult($user)) {
2668                         return false;
2669                 }
2670
2671                 $community_page = (($user['page-flags'] == User::PAGE_FLAGS_COMMUNITY) ? true : false);
2672                 $prvgroup = (($user['page-flags'] == User::PAGE_FLAGS_PRVGROUP) ? true : false);
2673
2674                 $item = self::selectFirst(self::ITEM_FIELDLIST, ['id' => $item_id]);
2675                 if (!DBA::isResult($item)) {
2676                         return false;
2677                 }
2678
2679                 $link = Strings::normaliseLink(System::baseUrl() . '/profile/' . $user['nickname']);
2680
2681                 /*
2682                  * Diaspora uses their own hardwired link URL in @-tags
2683                  * instead of the one we supply with webfinger
2684                  */
2685                 $dlink = Strings::normaliseLink(System::baseUrl() . '/u/' . $user['nickname']);
2686
2687                 $cnt = preg_match_all('/[\@\!]\[url\=(.*?)\](.*?)\[\/url\]/ism', $item['body'], $matches, PREG_SET_ORDER);
2688                 if ($cnt) {
2689                         foreach ($matches as $mtch) {
2690                                 if (Strings::compareLink($link, $mtch[1]) || Strings::compareLink($dlink, $mtch[1])) {
2691                                         $mention = true;
2692                                         Logger::log('mention found: ' . $mtch[2]);
2693                                 }
2694                         }
2695                 }
2696
2697                 if (!$mention) {
2698                         if (($community_page || $prvgroup) &&
2699                                   !$item['wall'] && !$item['origin'] && ($item['id'] == $item['parent'])) {
2700                                 // mmh.. no mention.. community page or private group... no wall.. no origin.. top-post (not a comment)
2701                                 // delete it!
2702                                 Logger::log("no-mention top-level post to community or private group. delete.");
2703                                 DBA::delete('item', ['id' => $item_id]);
2704                                 return true;
2705                         }
2706                         return false;
2707                 }
2708
2709                 $arr = ['item' => $item, 'user' => $user];
2710
2711                 Hook::callAll('tagged', $arr);
2712
2713                 if (!$community_page && !$prvgroup) {
2714                         return false;
2715                 }
2716
2717                 /*
2718                  * tgroup delivery - setup a second delivery chain
2719                  * prevent delivery looping - only proceed
2720                  * if the message originated elsewhere and is a top-level post
2721                  */
2722                 if ($item['wall'] || $item['origin'] || ($item['id'] != $item['parent'])) {
2723                         return false;
2724                 }
2725
2726                 // now change this copy of the post to a forum head message and deliver to all the tgroup members
2727                 $self = DBA::selectFirst('contact', ['id', 'name', 'url', 'thumb'], ['uid' => $uid, 'self' => true]);
2728                 if (!DBA::isResult($self)) {
2729                         return false;
2730                 }
2731
2732                 $owner_id = Contact::getIdForURL($self['url']);
2733
2734                 // also reset all the privacy bits to the forum default permissions
2735
2736                 $private = ($user['allow_cid'] || $user['allow_gid'] || $user['deny_cid'] || $user['deny_gid']) ? 1 : 0;
2737
2738                 $psid = PermissionSet::fetchIDForPost($user);
2739
2740                 $forum_mode = ($prvgroup ? 2 : 1);
2741
2742                 $fields = ['wall' => true, 'origin' => true, 'forum_mode' => $forum_mode, 'contact-id' => $self['id'],
2743                         'owner-id' => $owner_id, 'private' => $private, 'psid' => $psid];
2744                 self::update($fields, ['id' => $item_id]);
2745
2746                 self::updateThread($item_id);
2747
2748                 Worker::add(['priority' => PRIORITY_HIGH, 'dont_fork' => true], 'Notifier', Delivery::POST, $item_id);
2749
2750                 return false;
2751         }
2752
2753         public static function isRemoteSelf($contact, &$datarray)
2754         {
2755                 $a = \get_app();
2756
2757                 if (!$contact['remote_self']) {
2758                         return false;
2759                 }
2760
2761                 // Prevent the forwarding of posts that are forwarded
2762                 if (!empty($datarray["extid"]) && ($datarray["extid"] == Protocol::DFRN)) {
2763                         Logger::log('Already forwarded', Logger::DEBUG);
2764                         return false;
2765                 }
2766
2767                 // Prevent to forward already forwarded posts
2768                 if ($datarray["app"] == $a->getHostName()) {
2769                         Logger::log('Already forwarded (second test)', Logger::DEBUG);
2770                         return false;
2771                 }
2772
2773                 // Only forward posts
2774                 if ($datarray["verb"] != Activity::POST) {
2775                         Logger::log('No post', Logger::DEBUG);
2776                         return false;
2777                 }
2778
2779                 if (($contact['network'] != Protocol::FEED) && $datarray['private']) {
2780                         Logger::log('Not public', Logger::DEBUG);
2781                         return false;
2782                 }
2783
2784                 $datarray2 = $datarray;
2785                 Logger::log('remote-self start - Contact '.$contact['url'].' - '.$contact['remote_self'].' Item '.print_r($datarray, true), Logger::DEBUG);
2786                 if ($contact['remote_self'] == 2) {
2787                         $self = DBA::selectFirst('contact', ['id', 'name', 'url', 'thumb'],
2788                                         ['uid' => $contact['uid'], 'self' => true]);
2789                         if (DBA::isResult($self)) {
2790                                 $datarray['contact-id'] = $self["id"];
2791
2792                                 $datarray['owner-name'] = $self["name"];
2793                                 $datarray['owner-link'] = $self["url"];
2794                                 $datarray['owner-avatar'] = $self["thumb"];
2795
2796                                 $datarray['author-name']   = $datarray['owner-name'];
2797                                 $datarray['author-link']   = $datarray['owner-link'];
2798                                 $datarray['author-avatar'] = $datarray['owner-avatar'];
2799
2800                                 unset($datarray['edited']);
2801
2802                                 unset($datarray['network']);
2803                                 unset($datarray['owner-id']);
2804                                 unset($datarray['author-id']);
2805                         }
2806
2807                         if ($contact['network'] != Protocol::FEED) {
2808                                 $datarray["guid"] = System::createUUID();
2809                                 unset($datarray["plink"]);
2810                                 $datarray["uri"] = self::newURI($contact['uid'], $datarray["guid"]);
2811                                 $datarray["parent-uri"] = $datarray["uri"];
2812                                 $datarray["thr-parent"] = $datarray["uri"];
2813                                 $datarray["extid"] = Protocol::DFRN;
2814                                 $urlpart = parse_url($datarray2['author-link']);
2815                                 $datarray["app"] = $urlpart["host"];
2816                         } else {
2817                                 $datarray['private'] = 0;
2818                         }
2819                 }
2820
2821                 if ($contact['network'] != Protocol::FEED) {
2822                         // Store the original post
2823                         $result = self::insert($datarray2, false, false);
2824                         Logger::log('remote-self post original item - Contact '.$contact['url'].' return '.$result.' Item '.print_r($datarray2, true), Logger::DEBUG);
2825                 } else {
2826                         $datarray["app"] = "Feed";
2827                         $result = true;
2828                 }
2829
2830                 // Trigger automatic reactions for addons
2831                 $datarray['api_source'] = true;
2832
2833                 // We have to tell the hooks who we are - this really should be improved
2834                 $_SESSION["authenticated"] = true;
2835                 $_SESSION["uid"] = $contact['uid'];
2836
2837                 return $result;
2838         }
2839
2840         /**
2841          *
2842          * @param string $s
2843          * @param int    $uid
2844          * @param array  $item
2845          * @param int    $cid
2846          * @return string
2847          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
2848          * @throws \ImagickException
2849          */
2850         public static function fixPrivatePhotos($s, $uid, $item = null, $cid = 0)
2851         {
2852                 if (Config::get('system', 'disable_embedded')) {
2853                         return $s;
2854                 }
2855
2856                 Logger::log('check for photos', Logger::DEBUG);
2857                 $site = substr(System::baseUrl(), strpos(System::baseUrl(), '://'));
2858
2859                 $orig_body = $s;
2860                 $new_body = '';
2861
2862                 $img_start = strpos($orig_body, '[img');
2863                 $img_st_close = ($img_start !== false ? strpos(substr($orig_body, $img_start), ']') : false);
2864                 $img_len = ($img_start !== false ? strpos(substr($orig_body, $img_start + $img_st_close + 1), '[/img]') : false);
2865
2866                 while (($img_st_close !== false) && ($img_len !== false)) {
2867                         $img_st_close++; // make it point to AFTER the closing bracket
2868                         $image = substr($orig_body, $img_start + $img_st_close, $img_len);
2869
2870                         Logger::log('found photo ' . $image, Logger::DEBUG);
2871
2872                         if (stristr($image, $site . '/photo/')) {
2873                                 // Only embed locally hosted photos
2874                                 $replace = false;
2875                                 $i = basename($image);
2876                                 $i = str_replace(['.jpg', '.png', '.gif'], ['', '', ''], $i);
2877                                 $x = strpos($i, '-');
2878
2879                                 if ($x) {
2880                                         $res = substr($i, $x + 1);
2881                                         $i = substr($i, 0, $x);
2882                                         $photo = Photo::getPhotoForUser($uid, $i, $res);
2883                                         if (DBA::isResult($photo)) {
2884                                                 /*
2885                                                  * Check to see if we should replace this photo link with an embedded image
2886                                                  * 1. No need to do so if the photo is public
2887                                                  * 2. If there's a contact-id provided, see if they're in the access list
2888                                                  *    for the photo. If so, embed it.
2889                                                  * 3. Otherwise, if we have an item, see if the item permissions match the photo
2890                                                  *    permissions, regardless of order but first check to see if they're an exact
2891                                                  *    match to save some processing overhead.
2892                                                  */
2893                                                 if (self::hasPermissions($photo)) {
2894                                                         if ($cid) {
2895                                                                 $recips = self::enumeratePermissions($photo);
2896                                                                 if (in_array($cid, $recips)) {
2897                                                                         $replace = true;
2898                                                                 }
2899                                                         } elseif ($item) {
2900                                                                 if (self::samePermissions($uid, $item, $photo)) {
2901                                                                         $replace = true;
2902                                                                 }
2903                                                         }
2904                                                 }
2905                                                 if ($replace) {
2906                                                         $photo_img = Photo::getImageForPhoto($photo);
2907                                                         // If a custom width and height were specified, apply before embedding
2908                                                         if (preg_match("/\[img\=([0-9]*)x([0-9]*)\]/is", substr($orig_body, $img_start, $img_st_close), $match)) {
2909                                                                 Logger::log('scaling photo', Logger::DEBUG);
2910
2911                                                                 $width = intval($match[1]);
2912                                                                 $height = intval($match[2]);
2913
2914                                                                 $photo_img->scaleDown(max($width, $height));
2915                                                         }
2916
2917                                                         $data = $photo_img->asString();
2918                                                         $type = $photo_img->getType();
2919
2920                                                         Logger::log('replacing photo', Logger::DEBUG);
2921                                                         $image = 'data:' . $type . ';base64,' . base64_encode($data);
2922                                                         Logger::log('replaced: ' . $image, Logger::DATA);
2923                                                 }
2924                                         }
2925                                 }
2926                         }
2927
2928                         $new_body = $new_body . substr($orig_body, 0, $img_start + $img_st_close) . $image . '[/img]';
2929                         $orig_body = substr($orig_body, $img_start + $img_st_close + $img_len + strlen('[/img]'));
2930                         if ($orig_body === false) {
2931                                 $orig_body = '';
2932                         }
2933
2934                         $img_start = strpos($orig_body, '[img');
2935                         $img_st_close = ($img_start !== false ? strpos(substr($orig_body, $img_start), ']') : false);
2936                         $img_len = ($img_start !== false ? strpos(substr($orig_body, $img_start + $img_st_close + 1), '[/img]') : false);
2937                 }
2938
2939                 $new_body = $new_body . $orig_body;
2940
2941                 return $new_body;
2942         }
2943
2944         private static function hasPermissions($obj)
2945         {
2946                 return !empty($obj['allow_cid']) || !empty($obj['allow_gid']) ||
2947                         !empty($obj['deny_cid']) || !empty($obj['deny_gid']);
2948         }
2949
2950         private static function samePermissions($uid, $obj1, $obj2)
2951         {
2952                 // first part is easy. Check that these are exactly the same.
2953                 if (($obj1['allow_cid'] == $obj2['allow_cid'])
2954                         && ($obj1['allow_gid'] == $obj2['allow_gid'])
2955                         && ($obj1['deny_cid'] == $obj2['deny_cid'])
2956                         && ($obj1['deny_gid'] == $obj2['deny_gid'])) {
2957                         return true;
2958                 }
2959
2960                 // This is harder. Parse all the permissions and compare the resulting set.
2961                 $recipients1 = self::enumeratePermissions($obj1);
2962                 $recipients2 = self::enumeratePermissions($obj2);
2963                 sort($recipients1);
2964                 sort($recipients2);
2965
2966                 /// @TODO Comparison of arrays, maybe use array_diff_assoc() here?
2967                 return ($recipients1 == $recipients2);
2968         }
2969
2970         /**
2971          * Returns an array of contact-ids that are allowed to see this object
2972          *
2973          * @param array $obj        Item array with at least uid, allow_cid, allow_gid, deny_cid and deny_gid
2974          * @param bool  $check_dead Prunes unavailable contacts from the result
2975          * @return array
2976          * @throws \Exception
2977          */
2978         public static function enumeratePermissions(array $obj, bool $check_dead = false)
2979         {
2980                 $aclFormater = DI::aclFormatter();
2981
2982                 $allow_people = $aclFormater->expand($obj['allow_cid']);
2983                 $allow_groups = Group::expand($obj['uid'], $aclFormater->expand($obj['allow_gid']), $check_dead);
2984                 $deny_people  = $aclFormater->expand($obj['deny_cid']);
2985                 $deny_groups  = Group::expand($obj['uid'], $aclFormater->expand($obj['deny_gid']), $check_dead);
2986                 $recipients   = array_unique(array_merge($allow_people, $allow_groups));
2987                 $deny         = array_unique(array_merge($deny_people, $deny_groups));
2988                 $recipients   = array_diff($recipients, $deny);
2989                 return $recipients;
2990         }
2991
2992         public static function getFeedTags($item)
2993         {
2994                 $ret = [];
2995                 $matches = false;
2996                 $cnt = preg_match_all('|\#\[url\=(.*?)\](.*?)\[\/url\]|', $item['tag'], $matches);
2997                 if ($cnt) {
2998                         for ($x = 0; $x < $cnt; $x ++) {
2999                                 if ($matches[1][$x]) {
3000                                         $ret[$matches[2][$x]] = ['#', $matches[1][$x], $matches[2][$x]];
3001                                 }
3002                         }
3003                 }
3004                 $matches = false;
3005                 $cnt = preg_match_all('|\@\[url\=(.*?)\](.*?)\[\/url\]|', $item['tag'], $matches);
3006                 if ($cnt) {
3007                         for ($x = 0; $x < $cnt; $x ++) {
3008                                 if ($matches[1][$x]) {
3009                                         $ret[] = ['@', $matches[1][$x], $matches[2][$x]];
3010                                 }
3011                         }
3012                 }
3013                 return $ret;
3014         }
3015
3016         public static function expire($uid, $days, $network = "", $force = false)
3017         {
3018                 if (!$uid || ($days < 1)) {
3019                         return;
3020                 }
3021
3022                 $condition = ["`uid` = ? AND NOT `deleted` AND `id` = `parent` AND `gravity` = ?",
3023                         $uid, GRAVITY_PARENT];
3024
3025                 /*
3026                  * $expire_network_only = save your own wall posts
3027                  * and just expire conversations started by others
3028                  */
3029                 $expire_network_only = PConfig::get($uid, 'expire', 'network_only', false);
3030
3031                 if ($expire_network_only) {
3032                         $condition[0] .= " AND NOT `wall`";
3033                 }
3034
3035                 if ($network != "") {
3036                         $condition[0] .= " AND `network` = ?";
3037                         $condition[] = $network;
3038                 }
3039
3040                 $condition[0] .= " AND `received` < UTC_TIMESTAMP() - INTERVAL ? DAY";
3041                 $condition[] = $days;
3042
3043                 $items = self::select(['file', 'resource-id', 'starred', 'type', 'id', 'post-type'], $condition);
3044
3045                 if (!DBA::isResult($items)) {
3046                         return;
3047                 }
3048
3049                 $expire_items = PConfig::get($uid, 'expire', 'items', true);
3050
3051                 // Forcing expiring of items - but not notes and marked items
3052                 if ($force) {
3053                         $expire_items = true;
3054                 }
3055
3056                 $expire_notes = PConfig::get($uid, 'expire', 'notes', true);
3057                 $expire_starred = PConfig::get($uid, 'expire', 'starred', true);
3058                 $expire_photos = PConfig::get($uid, 'expire', 'photos', false);
3059
3060                 $expired = 0;
3061
3062                 while ($item = Item::fetch($items)) {
3063                         // don't expire filed items
3064
3065                         if (strpos($item['file'], '[') !== false) {
3066                                 continue;
3067                         }
3068
3069                         // Only expire posts, not photos and photo comments
3070
3071                         if (!$expire_photos && strlen($item['resource-id'])) {
3072                                 continue;
3073                         } elseif (!$expire_starred && intval($item['starred'])) {
3074                                 continue;
3075                         } elseif (!$expire_notes && (($item['type'] == 'note') || ($item['post-type'] == Item::PT_PERSONAL_NOTE))) {
3076                                 continue;
3077                         } elseif (!$expire_items && ($item['type'] != 'note') && ($item['post-type'] != Item::PT_PERSONAL_NOTE)) {
3078                                 continue;
3079                         }
3080
3081                         self::deleteById($item['id'], PRIORITY_LOW);
3082
3083                         ++$expired;
3084                 }
3085                 DBA::close($items);
3086                 Logger::log('User ' . $uid . ": expired $expired items; expire items: $expire_items, expire notes: $expire_notes, expire starred: $expire_starred, expire photos: $expire_photos");
3087         }
3088
3089         public static function firstPostDate($uid, $wall = false)
3090         {
3091                 $condition = ['uid' => $uid, 'wall' => $wall, 'deleted' => false, 'visible' => true, 'moderated' => false];
3092                 $params = ['order' => ['received' => false]];
3093                 $thread = DBA::selectFirst('thread', ['received'], $condition, $params);
3094                 if (DBA::isResult($thread)) {
3095                         return substr(DateTimeFormat::local($thread['received']), 0, 10);
3096                 }
3097                 return false;
3098         }
3099
3100         /**
3101          * @brief add/remove activity to an item
3102          *
3103          * Toggle activities as like,dislike,attend of an item
3104          *
3105          * @param string $item_id
3106          * @param string $verb
3107          *            Activity verb. One of
3108          *            like, unlike, dislike, undislike, attendyes, unattendyes,
3109          *            attendno, unattendno, attendmaybe, unattendmaybe
3110          * @return bool
3111          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
3112          * @throws \ImagickException
3113          * @hook  'post_local_end'
3114          *            array $arr
3115          *            'post_id' => ID of posted item
3116          */
3117         public static function performLike($item_id, $verb)
3118         {
3119                 if (!Session::isAuthenticated()) {
3120                         return false;
3121                 }
3122
3123                 switch ($verb) {
3124                         case 'like':
3125                         case 'unlike':
3126                                 $activity = Activity::LIKE;
3127                                 break;
3128                         case 'dislike':
3129                         case 'undislike':
3130                                 $activity = Activity::DISLIKE;
3131                                 break;
3132                         case 'attendyes':
3133                         case 'unattendyes':
3134                                 $activity = Activity::ATTEND;
3135                                 break;
3136                         case 'attendno':
3137                         case 'unattendno':
3138                                 $activity = Activity::ATTENDNO;
3139                                 break;
3140                         case 'attendmaybe':
3141                         case 'unattendmaybe':
3142                                 $activity = Activity::ATTENDMAYBE;
3143                                 break;
3144                         default:
3145                                 Logger::log('like: unknown verb ' . $verb . ' for item ' . $item_id);
3146                                 return false;
3147                 }
3148
3149                 // Enable activity toggling instead of on/off
3150                 $event_verb_flag = $activity === Activity::ATTEND || $activity === Activity::ATTENDNO || $activity === Activity::ATTENDMAYBE;
3151
3152                 Logger::log('like: verb ' . $verb . ' item ' . $item_id);
3153
3154                 $item = self::selectFirst(self::ITEM_FIELDLIST, ['`id` = ? OR `uri` = ?', $item_id, $item_id]);
3155                 if (!DBA::isResult($item)) {
3156                         Logger::log('like: unknown item ' . $item_id);
3157                         return false;
3158                 }
3159
3160                 $item_uri = $item['uri'];
3161
3162                 $uid = $item['uid'];
3163                 if (($uid == 0) && local_user()) {
3164                         $uid = local_user();
3165                 }
3166
3167                 if (!Security::canWriteToUserWall($uid)) {
3168                         Logger::log('like: unable to write on wall ' . $uid);
3169                         return false;
3170                 }
3171
3172                 // Retrieves the local post owner
3173                 $owner_self_contact = DBA::selectFirst('contact', [], ['uid' => $uid, 'self' => true]);
3174                 if (!DBA::isResult($owner_self_contact)) {
3175                         Logger::log('like: unknown owner ' . $uid);
3176                         return false;
3177                 }
3178
3179                 // Retrieve the current logged in user's public contact
3180                 $author_id = public_contact();
3181
3182                 $author_contact = DBA::selectFirst('contact', ['url'], ['id' => $author_id]);
3183                 if (!DBA::isResult($author_contact)) {
3184                         Logger::log('like: unknown author ' . $author_id);
3185                         return false;
3186                 }
3187
3188                 // Contact-id is the uid-dependant author contact
3189                 if (local_user() == $uid) {
3190                         $item_contact_id = $owner_self_contact['id'];
3191                 } else {
3192                         $item_contact_id = Contact::getIdForURL($author_contact['url'], $uid, true);
3193                         $item_contact = DBA::selectFirst('contact', [], ['id' => $item_contact_id]);
3194                         if (!DBA::isResult($item_contact)) {
3195                                 Logger::log('like: unknown item contact ' . $item_contact_id);
3196                                 return false;
3197                         }
3198                 }
3199
3200                 // Look for an existing verb row
3201                 // event participation are essentially radio toggles. If you make a subsequent choice,
3202                 // we need to eradicate your first choice.
3203                 if ($event_verb_flag) {
3204                         $verbs = [Activity::ATTEND, Activity::ATTENDNO, Activity::ATTENDMAYBE];
3205
3206                         // Translate to the index based activity index
3207                         $activities = [];
3208                         foreach ($verbs as $verb) {
3209                                 $activities[] = self::activityToIndex($verb);
3210                         }
3211                 } else {
3212                         $activities = self::activityToIndex($activity);
3213                 }
3214
3215                 $condition = ['activity' => $activities, 'deleted' => false, 'gravity' => GRAVITY_ACTIVITY,
3216                         'author-id' => $author_id, 'uid' => $item['uid'], 'thr-parent' => $item_uri];
3217
3218                 $like_item = self::selectFirst(['id', 'guid', 'verb'], $condition);
3219
3220                 // If it exists, mark it as deleted
3221                 if (DBA::isResult($like_item)) {
3222                         self::deleteById($like_item['id']);
3223
3224                         if (!$event_verb_flag || $like_item['verb'] == $activity) {
3225                                 return true;
3226                         }
3227                 }
3228
3229                 // Verb is "un-something", just trying to delete existing entries
3230                 if (strpos($verb, 'un') === 0) {
3231                         return true;
3232                 }
3233
3234                 $objtype = $item['resource-id'] ? Activity\ObjectType::IMAGE : Activity\ObjectType::NOTE;
3235
3236                 $new_item = [
3237                         'guid'          => System::createUUID(),
3238                         'uri'           => self::newURI($item['uid']),
3239                         'uid'           => $item['uid'],
3240                         'contact-id'    => $item_contact_id,
3241                         'wall'          => $item['wall'],
3242                         'origin'        => 1,
3243                         'network'       => Protocol::DFRN,
3244                         'gravity'       => GRAVITY_ACTIVITY,
3245                         'parent'        => $item['id'],
3246                         'parent-uri'    => $item['uri'],
3247                         'thr-parent'    => $item['uri'],
3248                         'owner-id'      => $author_id,
3249                         'author-id'     => $author_id,
3250                         'body'          => $activity,
3251                         'verb'          => $activity,
3252                         'object-type'   => $objtype,
3253                         'allow_cid'     => $item['allow_cid'],
3254                         'allow_gid'     => $item['allow_gid'],
3255                         'deny_cid'      => $item['deny_cid'],
3256                         'deny_gid'      => $item['deny_gid'],
3257                         'visible'       => 1,
3258                         'unseen'        => 1,
3259                 ];
3260
3261                 $signed = Diaspora::createLikeSignature($uid, $new_item);
3262                 if (!empty($signed)) {
3263                         $new_item['diaspora_signed_text'] = json_encode($signed);
3264                 }
3265
3266                 $new_item_id = self::insert($new_item);
3267
3268                 // If the parent item isn't visible then set it to visible
3269                 if (!$item['visible']) {
3270                         self::update(['visible' => true], ['id' => $item['id']]);
3271                 }
3272
3273                 $new_item['id'] = $new_item_id;
3274
3275                 Hook::callAll('post_local_end', $new_item);
3276
3277                 return true;
3278         }
3279
3280         private static function addThread($itemid, $onlyshadow = false)
3281         {
3282                 $fields = ['uid', 'created', 'edited', 'commented', 'received', 'changed', 'wall', 'private', 'pubmail',
3283                         'moderated', 'visible', 'starred', 'contact-id', 'post-type',
3284                         'deleted', 'origin', 'forum_mode', 'mention', 'network', 'author-id', 'owner-id'];
3285                 $condition = ["`id` = ? AND (`parent` = ? OR `parent` = 0)", $itemid, $itemid];
3286                 $item = self::selectFirst($fields, $condition);
3287
3288                 if (!DBA::isResult($item)) {
3289                         return;
3290                 }
3291
3292                 $item['iid'] = $itemid;
3293
3294                 if (!$onlyshadow) {
3295                         $result = DBA::insert('thread', $item);
3296
3297                         Logger::log("Add thread for item ".$itemid." - ".print_r($result, true), Logger::DEBUG);
3298                 }
3299         }
3300
3301         private static function updateThread($itemid, $setmention = false)
3302         {
3303                 $fields = ['uid', 'guid', 'created', 'edited', 'commented', 'received', 'changed', 'post-type',
3304                         'wall', 'private', 'pubmail', 'moderated', 'visible', 'starred', 'contact-id',
3305                         'deleted', 'origin', 'forum_mode', 'network', 'author-id', 'owner-id'];
3306                 $condition = ["`id` = ? AND (`parent` = ? OR `parent` = 0)", $itemid, $itemid];
3307
3308                 $item = self::selectFirst($fields, $condition);
3309                 if (!DBA::isResult($item)) {
3310                         return;
3311                 }
3312
3313                 if ($setmention) {
3314                         $item["mention"] = 1;
3315                 }
3316
3317                 $fields = [];
3318
3319                 foreach ($item as $field => $data) {
3320                         if (!in_array($field, ["guid"])) {
3321                                 $fields[$field] = $data;
3322                         }
3323                 }
3324
3325                 $result = DBA::update('thread', $fields, ['iid' => $itemid]);
3326
3327                 Logger::log("Update thread for item ".$itemid." - guid ".$item["guid"]." - ".(int)$result, Logger::DEBUG);
3328         }
3329
3330         private static function deleteThread($itemid, $itemuri = "")
3331         {
3332                 $item = DBA::selectFirst('thread', ['uid'], ['iid' => $itemid]);
3333                 if (!DBA::isResult($item)) {
3334                         Logger::log('No thread found for id '.$itemid, Logger::DEBUG);
3335                         return;
3336                 }
3337
3338                 $result = DBA::delete('thread', ['iid' => $itemid], ['cascade' => false]);
3339
3340                 Logger::log("deleteThread: Deleted thread for item ".$itemid." - ".print_r($result, true), Logger::DEBUG);
3341
3342                 if ($itemuri != "") {
3343                         $condition = ["`uri` = ? AND NOT `deleted` AND NOT (`uid` IN (?, 0))", $itemuri, $item["uid"]];
3344                         if (!self::exists($condition)) {
3345                                 DBA::delete('item', ['uri' => $itemuri, 'uid' => 0]);
3346                                 Logger::log("deleteThread: Deleted shadow for item ".$itemuri, Logger::DEBUG);
3347                         }
3348                 }
3349         }
3350
3351         public static function getPermissionsSQLByUserId($owner_id)
3352         {
3353                 $local_user = local_user();
3354                 $remote_user = Session::getRemoteContactID($owner_id);
3355
3356                 /*
3357                  * Construct permissions
3358                  *
3359                  * default permissions - anonymous user
3360                  */
3361                 $sql = " AND NOT `item`.`private`";
3362
3363                 // Profile owner - everything is visible
3364                 if ($local_user && ($local_user == $owner_id)) {
3365                         $sql = '';
3366                 } elseif ($remote_user) {
3367                         /*
3368                          * Authenticated visitor. Unless pre-verified,
3369                          * check that the contact belongs to this $owner_id
3370                          * and load the groups the visitor belongs to.
3371                          * If pre-verified, the caller is expected to have already
3372                          * done this and passed the groups into this function.
3373                          */
3374                         $set = PermissionSet::get($owner_id, $remote_user);
3375
3376                         if (!empty($set)) {
3377                                 $sql_set = " OR (`item`.`private` IN (1,2) AND `item`.`wall` AND `item`.`psid` IN (" . implode(',', $set) . "))";
3378                         } else {
3379                                 $sql_set = '';
3380                         }
3381
3382                         $sql = " AND (NOT `item`.`private`" . $sql_set . ")";
3383                 }
3384
3385                 return $sql;
3386         }
3387
3388         /**
3389          * get translated item type
3390          *
3391          * @param $item
3392          * @return string
3393          */
3394         public static function postType($item)
3395         {
3396                 if (!empty($item['event-id'])) {
3397                         return L10n::t('event');
3398                 } elseif (!empty($item['resource-id'])) {
3399                         return L10n::t('photo');
3400                 } elseif (!empty($item['verb']) && $item['verb'] !== Activity::POST) {
3401                         return L10n::t('activity');
3402                 } elseif ($item['id'] != $item['parent']) {
3403                         return L10n::t('comment');
3404                 }
3405
3406                 return L10n::t('post');
3407         }
3408
3409         /**
3410          * Sets the "rendered-html" field of the provided item
3411          *
3412          * Body is preserved to avoid side-effects as we modify it just-in-time for spoilers and private image links
3413          *
3414          * @param array $item
3415          * @param bool  $update
3416          *
3417          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
3418          * @todo Remove reference, simply return "rendered-html" and "rendered-hash"
3419          */
3420         public static function putInCache(&$item, $update = false)
3421         {
3422                 $body = $item["body"];
3423
3424                 $rendered_hash = $item['rendered-hash'] ?? '';
3425                 $rendered_html = $item['rendered-html'] ?? '';
3426
3427                 if ($rendered_hash == ''
3428                         || $rendered_html == ""
3429                         || $rendered_hash != hash("md5", $item["body"])
3430                         || Config::get("system", "ignore_cache")
3431                 ) {
3432                         self::addRedirToImageTags($item);
3433
3434                         $item["rendered-html"] = BBCode::convert($item["body"]);
3435                         $item["rendered-hash"] = hash("md5", $item["body"]);
3436
3437                         $hook_data = ['item' => $item, 'rendered-html' => $item['rendered-html'], 'rendered-hash' => $item['rendered-hash']];
3438                         Hook::callAll('put_item_in_cache', $hook_data);
3439                         $item['rendered-html'] = $hook_data['rendered-html'];
3440                         $item['rendered-hash'] = $hook_data['rendered-hash'];
3441                         unset($hook_data);
3442
3443                         // Force an update if the generated values differ from the existing ones
3444                         if ($rendered_hash != $item["rendered-hash"]) {
3445                                 $update = true;
3446                         }
3447
3448                         // Only compare the HTML when we forcefully ignore the cache
3449                         if (Config::get("system", "ignore_cache") && ($rendered_html != $item["rendered-html"])) {
3450                                 $update = true;
3451                         }
3452
3453                         if ($update && !empty($item["id"])) {
3454                                 self::update(
3455                                         [
3456                                                 'rendered-html' => $item["rendered-html"],
3457                                                 'rendered-hash' => $item["rendered-hash"]
3458                                         ],
3459                                         ['id' => $item["id"]]
3460                                 );
3461                         }
3462                 }
3463
3464                 $item["body"] = $body;
3465         }
3466
3467         /**
3468          * @brief Find any non-embedded images in private items and add redir links to them
3469          *
3470          * @param array &$item The field array of an item row
3471          */
3472         private static function addRedirToImageTags(array &$item)
3473         {
3474                 $app = DI::app();
3475
3476                 $matches = [];
3477                 $cnt = preg_match_all('|\[img\](http[^\[]*?/photo/[a-fA-F0-9]+?(-[0-9]\.[\w]+?)?)\[\/img\]|', $item['body'], $matches, PREG_SET_ORDER);
3478                 if ($cnt) {
3479                         foreach ($matches as $mtch) {
3480                                 if (strpos($mtch[1], '/redir') !== false) {
3481                                         continue;
3482                                 }
3483
3484                                 if ((local_user() == $item['uid']) && ($item['private'] == 1) && ($item['contact-id'] != $app->contact['id']) && ($item['network'] == Protocol::DFRN)) {
3485                                         $img_url = 'redir/' . $item['contact-id'] . '?url=' . urlencode($mtch[1]);
3486                                         $item['body'] = str_replace($mtch[0], '[img]' . $img_url . '[/img]', $item['body']);
3487                                 }
3488                         }
3489                 }
3490         }
3491
3492         /**
3493          * @brief Given an item array, convert the body element from bbcode to html and add smilie icons.
3494          * If attach is true, also add icons for item attachments.
3495          *
3496          * @param array   $item
3497          * @param boolean $attach
3498          * @param boolean $is_preview
3499          * @return string item body html
3500          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
3501          * @throws \ImagickException
3502          * @hook  prepare_body_init item array before any work
3503          * @hook  prepare_body_content_filter ('item'=>item array, 'filter_reasons'=>string array) before first bbcode to html
3504          * @hook  prepare_body ('item'=>item array, 'html'=>body string, 'is_preview'=>boolean, 'filter_reasons'=>string array) after first bbcode to html
3505          * @hook  prepare_body_final ('item'=>item array, 'html'=>body string) after attach icons and blockquote special case handling (spoiler, author)
3506          */
3507         public static function prepareBody(array &$item, $attach = false, $is_preview = false)
3508         {
3509                 $a = DI::app();
3510                 Hook::callAll('prepare_body_init', $item);
3511
3512                 // In order to provide theme developers more possibilities, event items
3513                 // are treated differently.
3514                 if ($item['object-type'] === Activity\ObjectType::EVENT && isset($item['event-id'])) {
3515                         $ev = Event::getItemHTML($item);
3516                         return $ev;
3517                 }
3518
3519                 $tags = Term::populateTagsFromItem($item);
3520
3521                 $item['tags'] = $tags['tags'];
3522                 $item['hashtags'] = $tags['hashtags'];
3523                 $item['mentions'] = $tags['mentions'];
3524
3525                 // Compile eventual content filter reasons
3526                 $filter_reasons = [];
3527                 if (!$is_preview && public_contact() != $item['author-id']) {
3528                         if (!empty($item['content-warning']) && (!local_user() || !PConfig::get(local_user(), 'system', 'disable_cw', false))) {
3529                                 $filter_reasons[] = L10n::t('Content warning: %s', $item['content-warning']);
3530                         }
3531
3532                         $hook_data = [
3533                                 'item' => $item,
3534                                 'filter_reasons' => $filter_reasons
3535                         ];
3536                         Hook::callAll('prepare_body_content_filter', $hook_data);
3537                         $filter_reasons = $hook_data['filter_reasons'];
3538                         unset($hook_data);
3539                 }
3540
3541                 // Update the cached values if there is no "zrl=..." on the links.
3542                 $update = (!Session::isAuthenticated() && ($item["uid"] == 0));
3543
3544                 // Or update it if the current viewer is the intented viewer.
3545                 if (($item["uid"] == local_user()) && ($item["uid"] != 0)) {
3546                         $update = true;
3547                 }
3548
3549                 self::putInCache($item, $update);
3550                 $s = $item["rendered-html"];
3551
3552                 $hook_data = [
3553                         'item' => $item,
3554                         'html' => $s,
3555                         'preview' => $is_preview,
3556                         'filter_reasons' => $filter_reasons
3557                 ];
3558                 Hook::callAll('prepare_body', $hook_data);
3559                 $s = $hook_data['html'];
3560                 unset($hook_data);
3561
3562                 if (!$attach) {
3563                         // Replace the blockquotes with quotes that are used in mails.
3564                         $mailquote = '<blockquote type="cite" class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">';
3565                         $s = str_replace(['<blockquote>', '<blockquote class="spoiler">', '<blockquote class="author">'], [$mailquote, $mailquote, $mailquote], $s);
3566                         return $s;
3567                 }
3568
3569                 $as = '';
3570                 $vhead = false;
3571                 $matches = [];
3572                 preg_match_all('|\[attach\]href=\"(.*?)\" length=\"(.*?)\" type=\"(.*?)\"(?: title=\"(.*?)\")?|', $item['attach'], $matches, PREG_SET_ORDER);
3573                 foreach ($matches as $mtch) {
3574                         $mime = $mtch[3];
3575
3576                         $the_url = Contact::magicLinkById($item['author-id'], $mtch[1]);
3577
3578                         if (strpos($mime, 'video') !== false) {
3579                                 if (!$vhead) {
3580                                         $vhead = true;
3581                                         $a->page['htmlhead'] .= Renderer::replaceMacros(Renderer::getMarkupTemplate('videos_head.tpl'));
3582                                 }
3583
3584                                 $url_parts = explode('/', $the_url);
3585                                 $id = end($url_parts);
3586                                 $as .= Renderer::replaceMacros(Renderer::getMarkupTemplate('video_top.tpl'), [
3587                                         '$video' => [
3588                                                 'id'     => $id,
3589                                                 'title'  => L10n::t('View Video'),
3590                                                 'src'    => $the_url,
3591                                                 'mime'   => $mime,
3592                                         ],
3593                                 ]);
3594                         }
3595
3596                         $filetype = strtolower(substr($mime, 0, strpos($mime, '/')));
3597                         if ($filetype) {
3598                                 $filesubtype = strtolower(substr($mime, strpos($mime, '/') + 1));
3599                                 $filesubtype = str_replace('.', '-', $filesubtype);
3600                         } else {
3601                                 $filetype = 'unkn';
3602                                 $filesubtype = 'unkn';
3603                         }
3604
3605                         $title = Strings::escapeHtml(trim(($mtch[4] ?? '') ?: $mtch[1]));
3606                         $title .= ' ' . $mtch[2] . ' ' . L10n::t('bytes');
3607
3608                         $icon = '<div class="attachtype icon s22 type-' . $filetype . ' subtype-' . $filesubtype . '"></div>';
3609                         $as .= '<a href="' . strip_tags($the_url) . '" title="' . $title . '" class="attachlink" target="_blank" >' . $icon . '</a>';
3610                 }
3611
3612                 if ($as != '') {
3613                         $s .= '<div class="body-attach">'.$as.'<div class="clear"></div></div>';
3614                 }
3615
3616                 // Map.
3617                 if (strpos($s, '<div class="map">') !== false && !empty($item['coord'])) {
3618                         $x = Map::byCoordinates(trim($item['coord']));
3619                         if ($x) {
3620                                 $s = preg_replace('/\<div class\=\"map\"\>/', '$0' . $x, $s);
3621                         }
3622                 }
3623
3624                 // Replace friendica image url size with theme preference.
3625                 if (!empty($a->theme_info['item_image_size'])) {
3626                         $ps = $a->theme_info['item_image_size'];
3627                         $s = preg_replace('|(<img[^>]+src="[^"]+/photo/[0-9a-f]+)-[0-9]|', "$1-" . $ps, $s);
3628                 }
3629
3630                 $s = HTML::applyContentFilter($s, $filter_reasons);
3631
3632                 $hook_data = ['item' => $item, 'html' => $s];
3633                 Hook::callAll('prepare_body_final', $hook_data);
3634
3635                 return $hook_data['html'];
3636         }
3637
3638         /**
3639          * get private link for item
3640          *
3641          * @param array $item
3642          * @return boolean|array False if item has not plink, otherwise array('href'=>plink url, 'title'=>translated title)
3643          * @throws \Exception
3644          */
3645         public static function getPlink($item)
3646         {
3647                 $a = DI::app();
3648
3649                 if ($a->user['nickname'] != "") {
3650                         $ret = [
3651                                 'href' => "display/" . $item['guid'],
3652                                 'orig' => "display/" . $item['guid'],
3653                                 'title' => L10n::t('View on separate page'),
3654                                 'orig_title' => L10n::t('view on separate page'),
3655                         ];
3656
3657                         if (!empty($item['plink'])) {
3658                                 $ret["href"] = $a->removeBaseURL($item['plink']);
3659                                 $ret["title"] = L10n::t('link to source');
3660                         }
3661
3662                 } elseif (!empty($item['plink']) && ($item['private'] != 1)) {
3663                         $ret = [
3664                                 'href' => $item['plink'],
3665                                 'orig' => $item['plink'],
3666                                 'title' => L10n::t('link to source'),
3667                         ];
3668                 } else {
3669                         $ret = [];
3670                 }
3671
3672                 return $ret;
3673         }
3674
3675         /**
3676          * Is the given item array a post that is sent as starting post to a forum?
3677          *
3678          * @param array $item
3679          * @param array $owner
3680          *
3681          * @return boolean "true" when it is a forum post
3682          */
3683         public static function isForumPost(array $item, array $owner = [])
3684         {
3685                 if (empty($owner)) {
3686                         $owner = User::getOwnerDataById($item['uid']);
3687                         if (empty($owner)) {
3688                                 return false;
3689                         }
3690                 }
3691
3692                 if (($item['author-id'] == $item['owner-id']) ||
3693                         ($owner['id'] == $item['contact-id']) ||
3694                         ($item['uri'] != $item['parent-uri']) ||
3695                         $item['origin']) {
3696                         return false;
3697                 }
3698
3699                 return Contact::isForum($item['contact-id']);
3700         }
3701
3702         /**
3703          * Search item id for given URI or plink
3704          *
3705          * @param string $uri
3706          * @param integer $uid
3707          *
3708          * @return integer item id
3709          */
3710         public static function searchByLink($uri, $uid = 0)
3711         {
3712                 $ssl_uri = str_replace('http://', 'https://', $uri);
3713                 $uris = [$uri, $ssl_uri, Strings::normaliseLink($uri)];
3714
3715                 $item = DBA::selectFirst('item', ['id'], ['uri' => $uris, 'uid' => $uid]);
3716                 if (DBA::isResult($item)) {
3717                         return $item['id'];
3718                 }
3719
3720                 $itemcontent = DBA::selectFirst('item-content', ['uri-id'], ['plink' => $uris]);
3721                 if (!DBA::isResult($itemcontent)) {
3722                         return 0;
3723                 }
3724
3725                 $itemuri = DBA::selectFirst('item-uri', ['uri'], ['id' => $itemcontent['uri-id']]);
3726                 if (!DBA::isResult($itemuri)) {
3727                         return 0;
3728                 }
3729
3730                 $item = DBA::selectFirst('item', ['id'], ['uri' => $itemuri['uri'], 'uid' => $uid]);
3731                 if (DBA::isResult($item)) {
3732                         return $item['id'];
3733                 }
3734
3735                 return 0;
3736         }
3737
3738         /**
3739          * Fetches item for given URI or plink
3740          *
3741          * @param string $uri
3742          * @param integer $uid
3743          *
3744          * @return integer item id
3745          */
3746         public static function fetchByLink($uri, $uid = 0)
3747         {
3748                 $item_id = self::searchByLink($uri, $uid);
3749                 if (!empty($item_id)) {
3750                         return $item_id;
3751                 }
3752
3753                 if (ActivityPub\Processor::fetchMissingActivity($uri)) {
3754                         $item_id = self::searchByLink($uri, $uid);
3755                 } else {
3756                         $item_id = Diaspora::fetchByURL($uri);
3757                 }
3758
3759                 if (!empty($item_id)) {
3760                         return $item_id;
3761                 }
3762
3763                 return 0;
3764         }
3765
3766         /**
3767          * Return share data from an item array (if the item is shared item)
3768          * We are providing the complete Item array, because at some time in the future
3769          * we hopefully will define these values not in the body anymore but in some item fields.
3770          * This function is meant to replace all similar functions in the system.
3771          *
3772          * @param array $item
3773          *
3774          * @return array with share information
3775          */
3776         public static function getShareArray($item)
3777         {
3778                 if (!preg_match("/(.*?)\[share(.*?)\]\s?(.*?)\s?\[\/share\]\s?/ism", $item['body'], $matches)) {
3779                         return [];
3780                 }
3781
3782                 $attribute_string = $matches[2];
3783                 $attributes = ['comment' => trim($matches[1]), 'shared' => trim($matches[3])];
3784                 foreach (['author', 'profile', 'avatar', 'guid', 'posted', 'link'] as $field) {
3785                         if (preg_match("/$field=(['\"])(.+?)\\1/ism", $attribute_string, $matches)) {
3786                                 $attributes[$field] = trim(html_entity_decode($matches[2] ?? '', ENT_QUOTES, 'UTF-8'));
3787                         }
3788                 }
3789                 return $attributes;
3790         }
3791
3792         /**
3793          * Fetch item information for shared items from the original items and adds it.
3794          *
3795          * @param array $item
3796          *
3797          * @return array item array with data from the original item
3798          */
3799         public static function addShareDataFromOriginal($item)
3800         {
3801                 $shared = self::getShareArray($item);
3802                 if (empty($shared)) {
3803                         return $item;
3804                 }
3805
3806                 // Real reshares always have got a GUID.
3807                 if (empty($shared['guid'])) {
3808                         return $item;
3809                 }
3810
3811                 $uid = $item['uid'] ?? 0;
3812
3813                 // first try to fetch the item via the GUID. This will work for all reshares that had been created on this system
3814                 $shared_item = self::selectFirst(['title', 'body', 'attach'], ['guid' => $shared['guid'], 'uid' => [0, $uid]]);
3815                 if (!DBA::isResult($shared_item)) {
3816                         // Otherwhise try to find (and possibly fetch) the item via the link. This should work for Diaspora and ActivityPub posts
3817                         $id = self::fetchByLink($shared['link'], $uid);
3818                         if (empty($id)) {
3819                                 Logger::info('Original item not found', ['url' => $shared['link'], 'callstack' => System::callstack()]);
3820                                 return $item;
3821                         }
3822
3823                         $shared_item = self::selectFirst(['title', 'body', 'attach'], ['id' => $id]);
3824                         if (!DBA::isResult($shared_item)) {
3825                                 return $item;
3826                         }
3827                         Logger::info('Got shared data from url', ['url' => $shared['link'], 'callstack' => System::callstack()]);
3828                 } else {
3829                         Logger::info('Got shared data from guid', ['guid' => $shared['guid'], 'callstack' => System::callstack()]);
3830                 }
3831
3832                 if (!empty($shared_item['title'])) {
3833                         $body = '[h3]' . $shared_item['title'] . "[/h3]\n" . $shared_item['body'];
3834                         unset($shared_item['title']);
3835                 } else {
3836                         $body = $shared_item['body'];
3837                 }
3838
3839                 $item['body'] = preg_replace("/\[share ([^\[\]]*)\].*\[\/share\]/ism", '[share $1]' . $body . '[/share]', $item['body']);
3840                 unset($shared_item['body']);
3841
3842                 return array_merge($item, $shared_item);
3843         }
3844 }