src/Model/Item.php

   1 <?php
   2
   3 /**
   4  * @file src/Model/Item.php
   5  */
   6
   7 namespace Friendica\Model;
   8
   9 use Friendica\BaseObject;
  10 use Friendica\Content\Text\BBCode;
  11 use Friendica\Content\Text\HTML;
  12 use Friendica\Core\Config;
  13 use Friendica\Core\Hook;
  14 use Friendica\Core\L10n;
  15 use Friendica\Core\Lock;
  16 use Friendica\Core\Logger;
  17 use Friendica\Core\PConfig;
  18 use Friendica\Core\Protocol;
  19 use Friendica\Core\Renderer;
  20 use Friendica\Core\System;
  21 use Friendica\Core\Worker;
  22 use Friendica\Database\DBA;
  23 use Friendica\Protocol\ActivityPub;
  24 use Friendica\Protocol\Diaspora;
  25 use Friendica\Protocol\OStatus;
  26 use Friendica\Util\DateTimeFormat;
  27 use Friendica\Util\Map;
  28 use Friendica\Util\Network;
  29 use Friendica\Util\Security;
  30 use Friendica\Util\Strings;
  31 use Friendica\Util\XML;
  32 use Friendica\Worker\Delivery;
  33 use Text_LanguageDetect;
  34
  35 class Item extends BaseObject
  36 {
  37         // Posting types, inspired by https://www.w3.org/TR/activitystreams-vocabulary/#object-types
  38         const PT_ARTICLE = 0;
  39         const PT_NOTE = 1;
  40         const PT_PAGE = 2;
  41         const PT_IMAGE = 16;
  42         const PT_AUDIO = 17;
  43         const PT_VIDEO = 18;
  44         const PT_DOCUMENT = 19;
  45         const PT_EVENT = 32;
  46         const PT_PERSONAL_NOTE = 128;
  47
  48         // Field list that is used to display the items
  49         const DISPLAY_FIELDLIST = [
  50                 'uid', 'id', 'parent', 'uri', 'thr-parent', 'parent-uri', 'guid', 'network', 'gravity',
  51                 'commented', 'created', 'edited', 'received', 'verb', 'object-type', 'postopts', 'plink',
  52                 'wall', 'private', 'starred', 'origin', 'title', 'body', 'file', 'attach', 'language',
  53                 'content-warning', 'location', 'coord', 'app', 'rendered-hash', 'rendered-html', 'object',
  54                 'allow_cid', 'allow_gid', 'deny_cid', 'deny_gid', 'item_id',
  55                 'author-id', 'author-link', 'author-name', 'author-avatar', 'author-network',
  56                 'owner-id', 'owner-link', 'owner-name', 'owner-avatar', 'owner-network',
  57                 'contact-id', 'contact-uid', 'contact-link', 'contact-name', 'contact-avatar',
  58                 'writable', 'self', 'cid', 'alias',
  59                 'event-id', 'event-created', 'event-edited', 'event-start', 'event-finish',
  60                 'event-summary', 'event-desc', 'event-location', 'event-type',
  61                 'event-nofinish', 'event-adjust', 'event-ignore', 'event-id',
  62                 'delivery_queue_count', 'delivery_queue_done'
  63         ];
  64
  65         // Field list that is used to deliver items via the protocols
  66         const DELIVER_FIELDLIST = ['uid', 'id', 'parent', 'uri', 'thr-parent', 'parent-uri', 'guid',
  67                         'parent-guid', 'created', 'edited', 'verb', 'object-type', 'object', 'target',
  68                         'private', 'title', 'body', 'location', 'coord', 'app',
  69                         'attach', 'tag', 'deleted', 'extid', 'post-type',
  70                         'allow_cid', 'allow_gid', 'deny_cid', 'deny_gid',
  71                         'author-id', 'author-link', 'owner-link', 'contact-uid',
  72                         'signed_text', 'signature', 'signer', 'network'];
  73
  74         // Field list for "item-content" table that is mixed with the item table
  75         const MIXED_CONTENT_FIELDLIST = ['title', 'content-warning', 'body', 'location',
  76                         'coord', 'app', 'rendered-hash', 'rendered-html', 'verb',
  77                         'object-type', 'object', 'target-type', 'target', 'plink'];
  78
  79         // Field list for "item-content" table that is not present in the "item" table
  80         const CONTENT_FIELDLIST = ['language'];
  81
  82         // All fields in the item table
  83         const ITEM_FIELDLIST = ['id', 'uid', 'parent', 'uri', 'parent-uri', 'thr-parent', 'guid',
  84                         'contact-id', 'type', 'wall', 'gravity', 'extid', 'icid', 'iaid', 'psid',
  85                         'created', 'edited', 'commented', 'received', 'changed', 'verb',
  86                         'postopts', 'plink', 'resource-id', 'event-id', 'tag', 'attach', 'inform',
  87                         'file', 'allow_cid', 'allow_gid', 'deny_cid', 'deny_gid', 'post-type',
  88                         'private', 'pubmail', 'moderated', 'visible', 'starred', 'bookmark',
  89                         'unseen', 'deleted', 'origin', 'forum_mode', 'mention', 'global', 'network',
  90                         'title', 'content-warning', 'body', 'location', 'coord', 'app',
  91                         'rendered-hash', 'rendered-html', 'object-type', 'object', 'target-type', 'target',
  92                         'author-id', 'author-link', 'author-name', 'author-avatar', 'author-network',
  93                         'owner-id', 'owner-link', 'owner-name', 'owner-avatar'];
  94
  95         // Never reorder or remove entries from this list. Just add new ones at the end, if needed.
  96         // The item-activity table only stores the index and needs this array to know the matching activity.
  97         const ACTIVITIES = [ACTIVITY_LIKE, ACTIVITY_DISLIKE, ACTIVITY_ATTEND, ACTIVITY_ATTENDNO, ACTIVITY_ATTENDMAYBE, ACTIVITY_FOLLOW, ACTIVITY2_ANNOUNCE];
  98
  99         private static $legacy_mode = null;
 100
 101         public static function isLegacyMode()
 102         {
 103                 if (is_null(self::$legacy_mode)) {
 104                         self::$legacy_mode = (Config::get("system", "post_update_version") < 1279);
 105                 }
 106
 107                 return self::$legacy_mode;
 108         }
 109
 110         /**
 111          * @brief returns an activity index from an activity string
 112          *
 113          * @param string $activity activity string
 114          * @return integer Activity index
 115          */
 116         public static function activityToIndex($activity)
 117         {
 118                 $index = array_search($activity, self::ACTIVITIES);
 119
 120                 if (is_bool($index)) {
 121                         $index = -1;
 122                 }
 123
 124                 return $index;
 125         }
 126
 127         /**
 128          * @brief returns an activity string from an activity index
 129          *
 130          * @param integer $index activity index
 131          * @return string Activity string
 132          */
 133         private static function indexToActivity($index)
 134         {
 135                 if (is_null($index) || !array_key_exists($index, self::ACTIVITIES)) {
 136                         return '';
 137                 }
 138
 139                 return self::ACTIVITIES[$index];
 140         }
 141
 142         /**
 143          * @brief Fetch a single item row
 144          *
 145          * @param mixed $stmt statement object
 146          * @return array current row
 147          */
 148         public static function fetch($stmt)
 149         {
 150                 $row = DBA::fetch($stmt);
 151
 152                 if (is_bool($row)) {
 153                         return $row;
 154                 }
 155
 156                 // ---------------------- Transform item structure data ----------------------
 157
 158                 // We prefer the data from the user's contact over the public one
 159                 if (!empty($row['author-link']) && !empty($row['contact-link']) &&
 160                         ($row['author-link'] == $row['contact-link'])) {
 161                         if (isset($row['author-avatar']) && !empty($row['contact-avatar'])) {
 162                                 $row['author-avatar'] = $row['contact-avatar'];
 163                         }
 164                         if (isset($row['author-name']) && !empty($row['contact-name'])) {
 165                                 $row['author-name'] = $row['contact-name'];
 166                         }
 167                 }
 168
 169                 if (!empty($row['owner-link']) && !empty($row['contact-link']) &&
 170                         ($row['owner-link'] == $row['contact-link'])) {
 171                         if (isset($row['owner-avatar']) && !empty($row['contact-avatar'])) {
 172                                 $row['owner-avatar'] = $row['contact-avatar'];
 173                         }
 174                         if (isset($row['owner-name']) && !empty($row['contact-name'])) {
 175                                 $row['owner-name'] = $row['contact-name'];
 176                         }
 177                 }
 178
 179                 // We can always comment on posts from these networks
 180                 if (array_key_exists('writable', $row) &&
 181                         in_array($row['internal-network'], Protocol::FEDERATED)) {
 182                         $row['writable'] = true;
 183                 }
 184
 185                 // ---------------------- Transform item content data ----------------------
 186
 187                 // Fetch data from the item-content table whenever there is content there
 188                 if (self::isLegacyMode()) {
 189                         $legacy_fields = array_merge(ItemDeliveryData::LEGACY_FIELD_LIST, self::MIXED_CONTENT_FIELDLIST);
 190                         foreach ($legacy_fields as $field) {
 191                                 if (empty($row[$field]) && !empty($row['internal-item-' . $field])) {
 192                                         $row[$field] = $row['internal-item-' . $field];
 193                                 }
 194                                 unset($row['internal-item-' . $field]);
 195                         }
 196                 }
 197
 198                 if (!empty($row['internal-iaid']) && array_key_exists('verb', $row)) {
 199                         $row['verb'] = self::indexToActivity($row['internal-activity']);
 200                         if (array_key_exists('title', $row)) {
 201                                 $row['title'] = '';
 202                         }
 203                         if (array_key_exists('body', $row)) {
 204                                 $row['body'] = $row['verb'];
 205                         }
 206                         if (array_key_exists('object', $row)) {
 207                                 $row['object'] = '';
 208                         }
 209                         if (array_key_exists('object-type', $row)) {
 210                                 $row['object-type'] = ACTIVITY_OBJ_NOTE;
 211                         }
 212                 } elseif (array_key_exists('verb', $row) && in_array($row['verb'], ['', ACTIVITY_POST, ACTIVITY_SHARE])) {
 213                         // Posts don't have an object or target - but having tags or files.
 214                         // We safe some performance by building tag and file strings only here.
 215                         // We remove object and target since they aren't used for this type.
 216                         if (array_key_exists('object', $row)) {
 217                                 $row['object'] = '';
 218                         }
 219                         if (array_key_exists('target', $row)) {
 220                                 $row['target'] = '';
 221                         }
 222                 }
 223
 224                 if (!array_key_exists('verb', $row) || in_array($row['verb'], ['', ACTIVITY_POST, ACTIVITY_SHARE])) {
 225                         // Build the tag string out of the term entries
 226                         if (array_key_exists('tag', $row) && empty($row['tag'])) {
 227                                 $row['tag'] = Term::tagTextFromItemId($row['internal-iid']);
 228                         }
 229
 230                         // Build the file string out of the term entries
 231                         if (array_key_exists('file', $row) && empty($row['file'])) {
 232                                 $row['file'] = Term::fileTextFromItemId($row['internal-iid']);
 233                         }
 234                 }
 235
 236                 if (array_key_exists('signed_text', $row) && array_key_exists('interaction', $row) && !is_null($row['interaction'])) {
 237                         $row['signed_text'] = $row['interaction'];
 238                 }
 239
 240                 if (array_key_exists('ignored', $row) && array_key_exists('internal-user-ignored', $row) && !is_null($row['internal-user-ignored'])) {
 241                         $row['ignored'] = $row['internal-user-ignored'];
 242                 }
 243
 244                 // Remove internal fields
 245                 unset($row['internal-activity']);
 246                 unset($row['internal-network']);
 247                 unset($row['internal-iid']);
 248                 unset($row['internal-iaid']);
 249                 unset($row['internal-icid']);
 250                 unset($row['internal-user-ignored']);
 251                 unset($row['interaction']);
 252
 253                 return $row;
 254         }
 255
 256         /**
 257          * @brief Fills an array with data from an item query
 258          *
 259          * @param object $stmt statement object
 260          * @param bool   $do_close
 261          * @return array Data array
 262          */
 263         public static function inArray($stmt, $do_close = true) {
 264                 if (is_bool($stmt)) {
 265                         return $stmt;
 266                 }
 267
 268                 $data = [];
 269                 while ($row = self::fetch($stmt)) {
 270                         $data[] = $row;
 271                 }
 272                 if ($do_close) {
 273                         DBA::close($stmt);
 274                 }
 275                 return $data;
 276         }
 277
 278         /**
 279          * @brief Check if item data exists
 280          *
 281          * @param array $condition array of fields for condition
 282          *
 283          * @return boolean Are there rows for that condition?
 284          * @throws \Exception
 285          */
 286         public static function exists($condition) {
 287                 $stmt = self::select(['id'], $condition, ['limit' => 1]);
 288
 289                 if (is_bool($stmt)) {
 290                         $retval = $stmt;
 291                 } else {
 292                         $retval = (DBA::numRows($stmt) > 0);
 293                 }
 294
 295                 DBA::close($stmt);
 296
 297                 return $retval;
 298         }
 299
 300         /**
 301          * Retrieve a single record from the item table for a given user and returns it in an associative array
 302          *
 303          * @brief Retrieve a single record from a table
 304          * @param integer $uid User ID
 305          * @param array   $selected
 306          * @param array   $condition
 307          * @param array   $params
 308          * @return bool|array
 309          * @throws \Exception
 310          * @see   DBA::select
 311          */
 312         public static function selectFirstForUser($uid, array $selected = [], array $condition = [], $params = [])
 313         {
 314                 $params['uid'] = $uid;
 315
 316                 if (empty($selected)) {
 317                         $selected = Item::DISPLAY_FIELDLIST;
 318                 }
 319
 320                 return self::selectFirst($selected, $condition, $params);
 321         }
 322
 323         /**
 324          * @brief Select rows from the item table for a given user
 325          *
 326          * @param integer $uid       User ID
 327          * @param array   $selected  Array of selected fields, empty for all
 328          * @param array   $condition Array of fields for condition
 329          * @param array   $params    Array of several parameters
 330          *
 331          * @return boolean|object
 332          * @throws \Exception
 333          */
 334         public static function selectForUser($uid, array $selected = [], array $condition = [], $params = [])
 335         {
 336                 $params['uid'] = $uid;
 337
 338                 if (empty($selected)) {
 339                         $selected = Item::DISPLAY_FIELDLIST;
 340                 }
 341
 342                 return self::select($selected, $condition, $params);
 343         }
 344
 345         /**
 346          * Retrieve a single record from the item table and returns it in an associative array
 347          *
 348          * @brief Retrieve a single record from a table
 349          * @param array $fields
 350          * @param array $condition
 351          * @param array $params
 352          * @return bool|array
 353          * @throws \Exception
 354          * @see   DBA::select
 355          */
 356         public static function selectFirst(array $fields = [], array $condition = [], $params = [])
 357         {
 358                 $params['limit'] = 1;
 359
 360                 $result = self::select($fields, $condition, $params);
 361
 362                 if (is_bool($result)) {
 363                         return $result;
 364                 } else {
 365                         $row = self::fetch($result);
 366                         DBA::close($result);
 367                         return $row;
 368                 }
 369         }
 370
 371         /**
 372          * @brief Select rows from the item table and returns them as an array
 373          *
 374          * @param array $selected  Array of selected fields, empty for all
 375          * @param array $condition Array of fields for condition
 376          * @param array $params    Array of several parameters
 377          *
 378          * @return array
 379          * @throws \Exception
 380          */
 381         public static function selectToArray(array $fields = [], array $condition = [], $params = [])
 382         {
 383                 $result = self::select($fields, $condition, $params);
 384
 385                 if (is_bool($result)) {
 386                         return [];
 387                 }
 388
 389                 $data = [];
 390                 while ($row = self::fetch($result)) {
 391                         $data[] = $row;
 392                 }
 393                 DBA::close($result);
 394
 395                 return $data;
 396         }
 397
 398         /**
 399          * @brief Select rows from the item table
 400          *
 401          * @param array $selected  Array of selected fields, empty for all
 402          * @param array $condition Array of fields for condition
 403          * @param array $params    Array of several parameters
 404          *
 405          * @return boolean|object
 406          * @throws \Exception
 407          */
 408         public static function select(array $selected = [], array $condition = [], $params = [])
 409         {
 410                 $uid = 0;
 411                 $usermode = false;
 412
 413                 if (isset($params['uid'])) {
 414                         $uid = $params['uid'];
 415                         $usermode = true;
 416                 }
 417
 418                 $fields = self::fieldlist($usermode);
 419
 420                 $select_fields = self::constructSelectFields($fields, $selected);
 421
 422                 $condition_string = DBA::buildCondition($condition);
 423
 424                 $condition_string = self::addTablesToFields($condition_string, $fields);
 425
 426                 if ($usermode) {
 427                         $condition_string = $condition_string . ' AND ' . self::condition(false);
 428                 }
 429
 430                 $param_string = self::addTablesToFields(DBA::buildParameter($params), $fields);
 431
 432                 $table = "`item` " . self::constructJoins($uid, $select_fields . $condition_string . $param_string, false, $usermode);
 433
 434                 $sql = "SELECT " . $select_fields . " FROM " . $table . $condition_string . $param_string;
 435
 436                 return DBA::p($sql, $condition);
 437         }
 438
 439         /**
 440          * @brief Select rows from the starting post in the item table
 441          *
 442          * @param integer $uid       User ID
 443          * @param array   $selected
 444          * @param array   $condition Array of fields for condition
 445          * @param array   $params    Array of several parameters
 446          *
 447          * @return boolean|object
 448          * @throws \Exception
 449          */
 450         public static function selectThreadForUser($uid, array $selected = [], array $condition = [], $params = [])
 451         {
 452                 $params['uid'] = $uid;
 453
 454                 if (empty($selected)) {
 455                         $selected = Item::DISPLAY_FIELDLIST;
 456                 }
 457
 458                 return self::selectThread($selected, $condition, $params);
 459         }
 460
 461         /**
 462          * Retrieve a single record from the starting post in the item table and returns it in an associative array
 463          *
 464          * @brief Retrieve a single record from a table
 465          * @param integer $uid User ID
 466          * @param array   $selected
 467          * @param array   $condition
 468          * @param array   $params
 469          * @return bool|array
 470          * @throws \Exception
 471          * @see   DBA::select
 472          */
 473         public static function selectFirstThreadForUser($uid, array $selected = [], array $condition = [], $params = [])
 474         {
 475                 $params['uid'] = $uid;
 476
 477                 if (empty($selected)) {
 478                         $selected = Item::DISPLAY_FIELDLIST;
 479                 }
 480
 481                 return self::selectFirstThread($selected, $condition, $params);
 482         }
 483
 484         /**
 485          * Retrieve a single record from the starting post in the item table and returns it in an associative array
 486          *
 487          * @brief Retrieve a single record from a table
 488          * @param array $fields
 489          * @param array $condition
 490          * @param array $params
 491          * @return bool|array
 492          * @throws \Exception
 493          * @see   DBA::select
 494          */
 495         public static function selectFirstThread(array $fields = [], array $condition = [], $params = [])
 496         {
 497                 $params['limit'] = 1;
 498                 $result = self::selectThread($fields, $condition, $params);
 499
 500                 if (is_bool($result)) {
 501                         return $result;
 502                 } else {
 503                         $row = self::fetch($result);
 504                         DBA::close($result);
 505                         return $row;
 506                 }
 507         }
 508
 509         /**
 510          * @brief Select rows from the starting post in the item table
 511          *
 512          * @param array $selected  Array of selected fields, empty for all
 513          * @param array $condition Array of fields for condition
 514          * @param array $params    Array of several parameters
 515          *
 516          * @return boolean|object
 517          * @throws \Exception
 518          */
 519         public static function selectThread(array $selected = [], array $condition = [], $params = [])
 520         {
 521                 $uid = 0;
 522                 $usermode = false;
 523
 524                 if (isset($params['uid'])) {
 525                         $uid = $params['uid'];
 526                         $usermode = true;
 527                 }
 528
 529                 $fields = self::fieldlist($usermode);
 530
 531                 $fields['thread'] = ['mention', 'ignored', 'iid'];
 532
 533                 $threadfields = ['thread' => ['iid', 'uid', 'contact-id', 'owner-id', 'author-id',
 534                         'created', 'edited', 'commented', 'received', 'changed', 'wall', 'private',
 535                         'pubmail', 'moderated', 'visible', 'starred', 'ignored', 'post-type',
 536                         'unseen', 'deleted', 'origin', 'forum_mode', 'mention', 'network']];
 537
 538                 $select_fields = self::constructSelectFields($fields, $selected);
 539
 540                 $condition_string = DBA::buildCondition($condition);
 541
 542                 $condition_string = self::addTablesToFields($condition_string, $threadfields);
 543                 $condition_string = self::addTablesToFields($condition_string, $fields);
 544
 545                 if ($usermode) {
 546                         $condition_string = $condition_string . ' AND ' . self::condition(true);
 547                 }
 548
 549                 $param_string = DBA::buildParameter($params);
 550                 $param_string = self::addTablesToFields($param_string, $threadfields);
 551                 $param_string = self::addTablesToFields($param_string, $fields);
 552
 553                 $table = "`thread` " . self::constructJoins($uid, $select_fields . $condition_string . $param_string, true, $usermode);
 554
 555                 $sql = "SELECT " . $select_fields . " FROM " . $table . $condition_string . $param_string;
 556
 557                 return DBA::p($sql, $condition);
 558         }
 559
 560         /**
 561          * @brief Returns a list of fields that are associated with the item table
 562          *
 563          * @param $usermode
 564          * @return array field list
 565          */
 566         private static function fieldlist($usermode)
 567         {
 568                 $fields = [];
 569
 570                 $fields['item'] = ['id', 'uid', 'parent', 'uri', 'parent-uri', 'thr-parent', 'guid',
 571                         'contact-id', 'owner-id', 'author-id', 'type', 'wall', 'gravity', 'extid',
 572                         'created', 'edited', 'commented', 'received', 'changed', 'psid',
 573                         'resource-id', 'event-id', 'tag', 'attach', 'post-type', 'file',
 574                         'private', 'pubmail', 'moderated', 'visible', 'starred', 'bookmark',
 575                         'unseen', 'deleted', 'origin', 'forum_mode', 'mention', 'global',
 576                         'id' => 'item_id', 'network', 'icid', 'iaid', 'id' => 'internal-iid',
 577                         'network' => 'internal-network', 'icid' => 'internal-icid',
 578                         'iaid' => 'internal-iaid'];
 579
 580                 if ($usermode) {
 581                         $fields['user-item'] = ['ignored' => 'internal-user-ignored'];
 582                 }
 583
 584                 $fields['item-activity'] = ['activity', 'activity' => 'internal-activity'];
 585
 586                 $fields['item-content'] = array_merge(self::CONTENT_FIELDLIST, self::MIXED_CONTENT_FIELDLIST);
 587
 588                 $fields['item-delivery-data'] = array_merge(ItemDeliveryData::LEGACY_FIELD_LIST, ItemDeliveryData::FIELD_LIST);
 589
 590                 $fields['permissionset'] = ['allow_cid', 'allow_gid', 'deny_cid', 'deny_gid'];
 591
 592                 $fields['author'] = ['url' => 'author-link', 'name' => 'author-name', 'addr' => 'author-addr',
 593                         'thumb' => 'author-avatar', 'nick' => 'author-nick', 'network' => 'author-network'];
 594
 595                 $fields['owner'] = ['url' => 'owner-link', 'name' => 'owner-name', 'addr' => 'owner-addr',
 596                         'thumb' => 'owner-avatar', 'nick' => 'owner-nick', 'network' => 'owner-network'];
 597
 598                 $fields['contact'] = ['url' => 'contact-link', 'name' => 'contact-name', 'thumb' => 'contact-avatar',
 599                         'writable', 'self', 'id' => 'cid', 'alias', 'uid' => 'contact-uid',
 600                         'photo', 'name-date', 'uri-date', 'avatar-date', 'thumb', 'dfrn-id'];
 601
 602                 $fields['parent-item'] = ['guid' => 'parent-guid', 'network' => 'parent-network'];
 603
 604                 $fields['parent-item-author'] = ['url' => 'parent-author-link', 'name' => 'parent-author-name'];
 605
 606                 $fields['event'] = ['created' => 'event-created', 'edited' => 'event-edited',
 607                         'start' => 'event-start','finish' => 'event-finish',
 608                         'summary' => 'event-summary','desc' => 'event-desc',
 609                         'location' => 'event-location', 'type' => 'event-type',
 610                         'nofinish' => 'event-nofinish','adjust' => 'event-adjust',
 611                         'ignore' => 'event-ignore', 'id' => 'event-id'];
 612
 613                 $fields['sign'] = ['signed_text', 'signature', 'signer'];
 614
 615                 $fields['diaspora-interaction'] = ['interaction'];
 616
 617                 return $fields;
 618         }
 619
 620         /**
 621          * @brief Returns SQL condition for the "select" functions
 622          *
 623          * @param boolean $thread_mode Called for the items (false) or for the threads (true)
 624          *
 625          * @return string SQL condition
 626          */
 627         private static function condition($thread_mode)
 628         {
 629                 if ($thread_mode) {
 630                         $master_table = "`thread`";
 631                 } else {
 632                         $master_table = "`item`";
 633                 }
 634                 return sprintf("$master_table.`visible` AND NOT $master_table.`deleted` AND NOT $master_table.`moderated`
 635                         AND (`user-item`.`hidden` IS NULL OR NOT `user-item`.`hidden`)
 636                         AND (`user-author`.`blocked` IS NULL OR NOT `user-author`.`blocked`)
 637                         AND (`user-author`.`ignored` IS NULL OR NOT `user-author`.`ignored` OR `item`.`gravity` != %d)
 638                         AND (`user-owner`.`blocked` IS NULL OR NOT `user-owner`.`blocked`)
 639                         AND (`user-owner`.`ignored` IS NULL OR NOT `user-owner`.`ignored` OR `item`.`gravity` != %d) ",
 640                         GRAVITY_PARENT, GRAVITY_PARENT);
 641         }
 642
 643         /**
 644          * @brief Returns all needed "JOIN" commands for the "select" functions
 645          *
 646          * @param integer $uid          User ID
 647          * @param string  $sql_commands The parts of the built SQL commands in the "select" functions
 648          * @param boolean $thread_mode  Called for the items (false) or for the threads (true)
 649          *
 650          * @param         $user_mode
 651          * @return string The SQL joins for the "select" functions
 652          */
 653         private static function constructJoins($uid, $sql_commands, $thread_mode, $user_mode)
 654         {
 655                 if ($thread_mode) {
 656                         $master_table = "`thread`";
 657                         $master_table_key = "`thread`.`iid`";
 658                         $joins = "STRAIGHT_JOIN `item` ON `item`.`id` = `thread`.`iid` ";
 659                 } else {
 660                         $master_table = "`item`";
 661                         $master_table_key = "`item`.`id`";
 662                         $joins = '';
 663                 }
 664
 665                 if ($user_mode) {
 666                         $joins .= sprintf("STRAIGHT_JOIN `contact` ON `contact`.`id` = $master_table.`contact-id`
 667                                 AND NOT `contact`.`blocked`
 668                                 AND ((NOT `contact`.`readonly` AND NOT `contact`.`pending` AND (`contact`.`rel` IN (%s, %s)))
 669                                 OR `contact`.`self` OR `item`.`gravity` != %d OR `contact`.`uid` = 0)
 670                                 STRAIGHT_JOIN `contact` AS `author` ON `author`.`id` = $master_table.`author-id` AND NOT `author`.`blocked`
 671                                 STRAIGHT_JOIN `contact` AS `owner` ON `owner`.`id` = $master_table.`owner-id` AND NOT `owner`.`blocked`
 672                                 LEFT JOIN `user-item` ON `user-item`.`iid` = $master_table_key AND `user-item`.`uid` = %d
 673                                 LEFT JOIN `user-contact` AS `user-author` ON `user-author`.`cid` = $master_table.`author-id` AND `user-author`.`uid` = %d
 674                                 LEFT JOIN `user-contact` AS `user-owner` ON `user-owner`.`cid` = $master_table.`owner-id` AND `user-owner`.`uid` = %d",
 675                                 Contact::SHARING, Contact::FRIEND, GRAVITY_PARENT, intval($uid), intval($uid), intval($uid));
 676                 } else {
 677                         if (strpos($sql_commands, "`contact`.") !== false) {
 678                                 $joins .= "LEFT JOIN `contact` ON `contact`.`id` = $master_table.`contact-id`";
 679                         }
 680                         if (strpos($sql_commands, "`author`.") !== false) {
 681                                 $joins .= " LEFT JOIN `contact` AS `author` ON `author`.`id` = $master_table.`author-id`";
 682                         }
 683                         if (strpos($sql_commands, "`owner`.") !== false) {
 684                                 $joins .= " LEFT JOIN `contact` AS `owner` ON `owner`.`id` = $master_table.`owner-id`";
 685                         }
 686                 }
 687
 688                 if (strpos($sql_commands, "`group_member`.") !== false) {
 689                         $joins .= " STRAIGHT_JOIN `group_member` ON `group_member`.`contact-id` = $master_table.`contact-id`";
 690                 }
 691
 692                 if (strpos($sql_commands, "`user`.") !== false) {
 693                         $joins .= " STRAIGHT_JOIN `user` ON `user`.`uid` = $master_table.`uid`";
 694                 }
 695
 696                 if (strpos($sql_commands, "`event`.") !== false) {
 697                         $joins .= " LEFT JOIN `event` ON `event-id` = `event`.`id`";
 698                 }
 699
 700                 if (strpos($sql_commands, "`sign`.") !== false) {
 701                         $joins .= " LEFT JOIN `sign` ON `sign`.`iid` = `item`.`id`";
 702                 }
 703
 704                 if (strpos($sql_commands, "`diaspora-interaction`.") !== false) {
 705                         $joins .= " LEFT JOIN `diaspora-interaction` ON `diaspora-interaction`.`uri-id` = `item`.`uri-id`";
 706                 }
 707
 708                 if (strpos($sql_commands, "`item-activity`.") !== false) {
 709                         $joins .= " LEFT JOIN `item-activity` ON `item-activity`.`uri-id` = `item`.`uri-id`";
 710                 }
 711
 712                 if (strpos($sql_commands, "`item-content`.") !== false) {
 713                         $joins .= " LEFT JOIN `item-content` ON `item-content`.`uri-id` = `item`.`uri-id`";
 714                 }
 715
 716                 if (strpos($sql_commands, "`item-delivery-data`.") !== false) {
 717                         $joins .= " LEFT JOIN `item-delivery-data` ON `item-delivery-data`.`iid` = `item`.`id`";
 718                 }
 719
 720                 if (strpos($sql_commands, "`permissionset`.") !== false) {
 721                         $joins .= " LEFT JOIN `permissionset` ON `permissionset`.`id` = `item`.`psid`";
 722                 }
 723
 724                 if ((strpos($sql_commands, "`parent-item`.") !== false) || (strpos($sql_commands, "`parent-author`.") !== false)) {
 725                         $joins .= " STRAIGHT_JOIN `item` AS `parent-item` ON `parent-item`.`id` = `item`.`parent`";
 726                 }
 727
 728                 if (strpos($sql_commands, "`parent-item-author`.") !== false) {
 729                         $joins .= " STRAIGHT_JOIN `contact` AS `parent-item-author` ON `parent-item-author`.`id` = `parent-item`.`author-id`";
 730                 }
 731
 732                 return $joins;
 733         }
 734
 735         /**
 736          * @brief Add the field list for the "select" functions
 737          *
 738          * @param array $fields The field definition array
 739          * @param array $selected The array with the selected fields from the "select" functions
 740          *
 741          * @return string The field list
 742          */
 743         private static function constructSelectFields($fields, $selected)
 744         {
 745                 if (!empty($selected)) {
 746                         $selected[] = 'internal-iid';
 747                         $selected[] = 'internal-iaid';
 748                         $selected[] = 'internal-icid';
 749                         $selected[] = 'internal-network';
 750                 }
 751
 752                 if (in_array('verb', $selected)) {
 753                         $selected[] = 'internal-activity';
 754                 }
 755
 756                 if (in_array('ignored', $selected)) {
 757                         $selected[] = 'internal-user-ignored';
 758                 }
 759
 760                 if (in_array('signed_text', $selected)) {
 761                         $selected[] = 'interaction';
 762                 }
 763
 764                 $legacy_fields = array_merge(ItemDeliveryData::LEGACY_FIELD_LIST, self::MIXED_CONTENT_FIELDLIST);
 765
 766                 $selection = [];
 767                 foreach ($fields as $table => $table_fields) {
 768                         foreach ($table_fields as $field => $select) {
 769                                 if (empty($selected) || in_array($select, $selected)) {
 770                                         if (self::isLegacyMode() && in_array($select, $legacy_fields)) {
 771                                                 $selection[] = "`item`.`".$select."` AS `internal-item-" . $select . "`";
 772                                         }
 773                                         if (is_int($field)) {
 774                                                 $selection[] = "`" . $table . "`.`" . $select . "`";
 775                                         } else {
 776                                                 $selection[] = "`" . $table . "`.`" . $field . "` AS `" . $select . "`";
 777                                         }
 778                                 }
 779                         }
 780                 }
 781                 return implode(", ", $selection);
 782         }
 783
 784         /**
 785          * @brief add table definition to fields in an SQL query
 786          *
 787          * @param string $query SQL query
 788          * @param array $fields The field definition array
 789          *
 790          * @return string the changed SQL query
 791          */
 792         private static function addTablesToFields($query, $fields)
 793         {
 794                 foreach ($fields as $table => $table_fields) {
 795                         foreach ($table_fields as $alias => $field) {
 796                                 if (is_int($alias)) {
 797                                         $replace_field = $field;
 798                                 } else {
 799                                         $replace_field = $alias;
 800                                 }
 801
 802                                 $search = "/([^\.])`" . $field . "`/i";
 803                                 $replace = "$1`" . $table . "`.`" . $replace_field . "`";
 804                                 $query = preg_replace($search, $replace, $query);
 805                         }
 806                 }
 807                 return $query;
 808         }
 809
 810         /**
 811          * @brief Update existing item entries
 812          *
 813          * @param array $fields    The fields that are to be changed
 814          * @param array $condition The condition for finding the item entries
 815          *
 816          * In the future we may have to change permissions as well.
 817          * Then we had to add the user id as third parameter.
 818          *
 819          * A return value of "0" doesn't mean an error - but that 0 rows had been changed.
 820          *
 821          * @return integer|boolean number of affected rows - or "false" if there was an error
 822          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 823          */
 824         public static function update(array $fields, array $condition)
 825         {
 826                 if (empty($condition) || empty($fields)) {
 827                         return false;
 828                 }
 829
 830                 // To ensure the data integrity we do it in an transaction
 831                 DBA::transaction();
 832
 833                 // We cannot simply expand the condition to check for origin entries
 834                 // The condition needn't to be a simple array but could be a complex condition.
 835                 // And we have to execute this query before the update to ensure to fetch the same data.
 836                 $items = DBA::select('item', ['id', 'origin', 'uri', 'uri-id', 'iaid', 'icid', 'tag', 'file'], $condition);
 837
 838                 $content_fields = [];
 839                 foreach (array_merge(self::CONTENT_FIELDLIST, self::MIXED_CONTENT_FIELDLIST) as $field) {
 840                         if (isset($fields[$field])) {
 841                                 $content_fields[$field] = $fields[$field];
 842                                 if (in_array($field, self::CONTENT_FIELDLIST) || !self::isLegacyMode()) {
 843                                         unset($fields[$field]);
 844                                 } else {
 845                                         $fields[$field] = null;
 846                                 }
 847                         }
 848                 }
 849
 850                 $delivery_data = ItemDeliveryData::extractFields($fields);
 851
 852                 $clear_fields = ['bookmark', 'type', 'author-name', 'author-avatar', 'author-link', 'owner-name', 'owner-avatar', 'owner-link', 'postopts', 'inform'];
 853                 foreach ($clear_fields as $field) {
 854                         if (array_key_exists($field, $fields)) {
 855                                 $fields[$field] = null;
 856                         }
 857                 }
 858
 859                 if (array_key_exists('tag', $fields)) {
 860                         $tags = $fields['tag'];
 861                         $fields['tag'] = null;
 862                 } else {
 863                         $tags = null;
 864                 }
 865
 866                 if (array_key_exists('file', $fields)) {
 867                         $files = $fields['file'];
 868                         $fields['file'] = null;
 869                 } else {
 870                         $files = null;
 871                 }
 872
 873                 if (!empty($fields)) {
 874                         $success = DBA::update('item', $fields, $condition);
 875
 876                         if (!$success) {
 877                                 DBA::close($items);
 878                                 DBA::rollback();
 879                                 return false;
 880                         }
 881                 }
 882
 883                 // When there is no content for the "old" item table, this will count the fetched items
 884                 $rows = DBA::affectedRows();
 885
 886                 while ($item = DBA::fetch($items)) {
 887                         if (!empty($item['iaid']) || (!empty($content_fields['verb']) && (self::activityToIndex($content_fields['verb']) >= 0))) {
 888                                 self::updateActivity($content_fields, ['uri-id' => $item['uri-id']]);
 889
 890                                 if (empty($item['iaid'])) {
 891                                         $item_activity = DBA::selectFirst('item-activity', ['id'], ['uri-id' => $item['uri-id']]);
 892                                         if (DBA::isResult($item_activity)) {
 893                                                 $item_fields = ['iaid' => $item_activity['id'], 'icid' => null];
 894                                                 foreach (self::MIXED_CONTENT_FIELDLIST as $field) {
 895                                                         if (self::isLegacyMode()) {
 896                                                                 $item_fields[$field] = null;
 897                                                         } else {
 898                                                                 unset($item_fields[$field]);
 899                                                         }
 900                                                 }
 901                                                 DBA::update('item', $item_fields, ['id' => $item['id']]);
 902
 903                                                 if (!empty($item['icid']) && !DBA::exists('item', ['icid' => $item['icid']])) {
 904                                                         DBA::delete('item-content', ['id' => $item['icid']]);
 905                                                 }
 906                                         }
 907                                 } elseif (!empty($item['icid'])) {
 908                                         DBA::update('item', ['icid' => null], ['id' => $item['id']]);
 909
 910                                         if (!DBA::exists('item', ['icid' => $item['icid']])) {
 911                                                 DBA::delete('item-content', ['id' => $item['icid']]);
 912                                         }
 913                                 }
 914                         } else {
 915                                 self::updateContent($content_fields, ['uri-id' => $item['uri-id']]);
 916
 917                                 if (empty($item['icid'])) {
 918                                         $item_content = DBA::selectFirst('item-content', [], ['uri-id' => $item['uri-id']]);
 919                                         if (DBA::isResult($item_content)) {
 920                                                 $item_fields = ['icid' => $item_content['id']];
 921                                                 // Clear all fields in the item table that have a content in the item-content table
 922                                                 foreach ($item_content as $field => $content) {
 923                                                         if (in_array($field, self::MIXED_CONTENT_FIELDLIST) && !empty($item_content[$field])) {
 924                                                                 if (self::isLegacyMode()) {
 925                                                                         $item_fields[$field] = null;
 926                                                                 } else {
 927                                                                         unset($item_fields[$field]);
 928                                                                 }
 929                                                         }
 930                                                 }
 931                                                 DBA::update('item', $item_fields, ['id' => $item['id']]);
 932                                         }
 933                                 }
 934                         }
 935
 936                         if (!is_null($tags)) {
 937                                 Term::insertFromTagFieldByItemId($item['id'], $tags);
 938                                 if (!empty($item['tag'])) {
 939                                         DBA::update('item', ['tag' => ''], ['id' => $item['id']]);
 940                                 }
 941                         }
 942
 943                         if (!is_null($files)) {
 944                                 Term::insertFromFileFieldByItemId($item['id'], $files);
 945                                 if (!empty($item['file'])) {
 946                                         DBA::update('item', ['file' => ''], ['id' => $item['id']]);
 947                                 }
 948                         }
 949
 950                         ItemDeliveryData::update($item['id'], $delivery_data);
 951
 952                         self::updateThread($item['id']);
 953
 954                         // We only need to notfiy others when it is an original entry from us.
 955                         // Only call the notifier when the item has some content relevant change.
 956                         if ($item['origin'] && in_array('edited', array_keys($fields))) {
 957                                 Worker::add(PRIORITY_HIGH, "Notifier", Delivery::POST, $item['id']);
 958                         }
 959                 }
 960
 961                 DBA::close($items);
 962                 DBA::commit();
 963                 return $rows;
 964         }
 965
 966         /**
 967          * @brief Delete an item and notify others about it - if it was ours
 968          *
 969          * @param array   $condition The condition for finding the item entries
 970          * @param integer $priority  Priority for the notification
 971          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 972          */
 973         public static function delete($condition, $priority = PRIORITY_HIGH)
 974         {
 975                 $items = self::select(['id'], $condition);
 976                 while ($item = self::fetch($items)) {
 977                         self::deleteById($item['id'], $priority);
 978                 }
 979                 DBA::close($items);
 980         }
 981
 982         /**
 983          * @brief Delete an item for an user and notify others about it - if it was ours
 984          *
 985          * @param array   $condition The condition for finding the item entries
 986          * @param integer $uid       User who wants to delete this item
 987          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
 988          */
 989         public static function deleteForUser($condition, $uid)
 990         {
 991                 if ($uid == 0) {
 992                         return;
 993                 }
 994
 995                 $items = self::select(['id', 'uid'], $condition);
 996                 while ($item = self::fetch($items)) {
 997                         // "Deleting" global items just means hiding them
 998                         if ($item['uid'] == 0) {
 999                                 DBA::update('user-item', ['hidden' => true], ['iid' => $item['id'], 'uid' => $uid], true);
1000                         } elseif ($item['uid'] == $uid) {
1001                                 self::deleteById($item['id'], PRIORITY_HIGH);
1002                         } else {
1003                                 Logger::log('Wrong ownership. Not deleting item ' . $item['id']);
1004                         }
1005                 }
1006                 DBA::close($items);
1007         }
1008
1009         /**
1010          * @brief Delete an item and notify others about it - if it was ours
1011          *
1012          * @param integer $item_id  Item ID that should be delete
1013          * @param integer $priority Priority for the notification
1014          *
1015          * @return boolean success
1016          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
1017          */
1018         public static function deleteById($item_id, $priority = PRIORITY_HIGH)
1019         {
1020                 // locate item to be deleted
1021                 $fields = ['id', 'uri', 'uid', 'parent', 'parent-uri', 'origin',
1022                         'deleted', 'file', 'resource-id', 'event-id', 'attach',
1023                         'verb', 'object-type', 'object', 'target', 'contact-id',
1024                         'icid', 'iaid', 'psid'];
1025                 $item = self::selectFirst($fields, ['id' => $item_id]);
1026                 if (!DBA::isResult($item)) {
1027                         Logger::log('Item with ID ' . $item_id . " hasn't been found.", Logger::DEBUG);
1028                         return false;
1029                 }
1030
1031                 if ($item['deleted']) {
1032                         Logger::log('Item with ID ' . $item_id . ' has already been deleted.', Logger::DEBUG);
1033                         return false;
1034                 }
1035
1036                 $parent = self::selectFirst(['origin'], ['id' => $item['parent']]);
1037                 if (!DBA::isResult($parent)) {
1038                         $parent = ['origin' => false];
1039                 }
1040
1041                 // clean up categories and tags so they don't end up as orphans
1042
1043                 $matches = false;
1044                 $cnt = preg_match_all('/<(.*?)>/', $item['file'], $matches, PREG_SET_ORDER);
1045
1046                 if ($cnt) {
1047                         foreach ($matches as $mtch) {
1048                                 FileTag::unsaveFile($item['uid'], $item['id'], $mtch[1],true);
1049                         }
1050                 }
1051
1052                 $matches = false;
1053
1054                 $cnt = preg_match_all('/\[(.*?)\]/', $item['file'], $matches, PREG_SET_ORDER);
1055
1056                 if ($cnt) {
1057                         foreach ($matches as $mtch) {
1058                                 FileTag::unsaveFile($item['uid'], $item['id'], $mtch[1],false);
1059                         }
1060                 }
1061
1062                 /*
1063                  * If item is a link to a photo resource, nuke all the associated photos
1064                  * (visitors will not have photo resources)
1065                  * This only applies to photos uploaded from the photos page. Photos inserted into a post do not
1066                  * generate a resource-id and therefore aren't intimately linked to the item.
1067                  */
1068                 /// @TODO: this should first check if photo is used elsewhere
1069                 if (strlen($item['resource-id'])) {
1070                         Photo::delete(['resource-id' => $item['resource-id'], 'uid' => $item['uid']]);
1071                 }
1072
1073                 // If item is a link to an event, delete the event.
1074                 if (intval($item['event-id'])) {
1075                         Event::delete($item['event-id']);
1076                 }
1077
1078                 // If item has attachments, drop them
1079                 /// @TODO: this should first check if attachment is used elsewhere
1080                 foreach (explode(",", $item['attach']) as $attach) {
1081                         preg_match("|attach/(\d+)|", $attach, $matches);
1082                         if (is_array($matches) && count($matches) > 1) {
1083                                 Attach::delete(['id' => $matches[1], 'uid' => $item['uid']]);
1084                         }
1085                 }
1086
1087                 // Delete tags that had been attached to other items
1088                 self::deleteTagsFromItem($item);
1089
1090                 // Set the item to "deleted"
1091                 $item_fields = ['deleted' => true, 'edited' => DateTimeFormat::utcNow(), 'changed' => DateTimeFormat::utcNow()];
1092                 DBA::update('item', $item_fields, ['id' => $item['id']]);
1093
1094                 Term::insertFromTagFieldByItemId($item['id'], '');
1095                 Term::insertFromFileFieldByItemId($item['id'], '');
1096                 self::deleteThread($item['id'], $item['parent-uri']);
1097
1098                 if (!self::exists(["`uri` = ? AND `uid` != 0 AND NOT `deleted`", $item['uri']])) {
1099                         self::delete(['uri' => $item['uri'], 'uid' => 0, 'deleted' => false], $priority);
1100                 }
1101
1102                 ItemDeliveryData::delete($item['id']);
1103
1104                 // We don't delete the item-activity here, since we need some of the data for ActivityPub
1105
1106                 if (!empty($item['icid']) && !self::exists(['icid' => $item['icid'], 'deleted' => false])) {
1107                         DBA::delete('item-content', ['id' => $item['icid']], ['cascade' => false]);
1108                 }
1109                 // When the permission set will be used in photo and events as well,
1110                 // this query here needs to be extended.
1111                 // @todo Currently deactivated. We need the permission set in the deletion process.
1112                 // This is a reminder to add the removal somewhere else.
1113                 //if (!empty($item['psid']) && !self::exists(['psid' => $item['psid'], 'deleted' => false])) {
1114                 //      DBA::delete('permissionset', ['id' => $item['psid']], ['cascade' => false]);
1115                 //}
1116
1117                 // If it's the parent of a comment thread, kill all the kids
1118                 if ($item['id'] == $item['parent']) {
1119                         self::delete(['parent' => $item['parent'], 'deleted' => false], $priority);
1120                 }
1121
1122                 // Is it our comment and/or our thread?
1123                 if ($item['origin'] || $parent['origin']) {
1124
1125                         // When we delete the original post we will delete all existing copies on the server as well
1126                         self::delete(['uri' => $item['uri'], 'deleted' => false], $priority);
1127
1128                         // send the notification upstream/downstream
1129                         Worker::add(['priority' => $priority, 'dont_fork' => true], "Notifier", Delivery::DELETION, intval($item['id']));
1130                 } elseif ($item['uid'] != 0) {
1131
1132                         // When we delete just our local user copy of an item, we have to set a marker to hide it
1133                         $global_item = self::selectFirst(['id'], ['uri' => $item['uri'], 'uid' => 0, 'deleted' => false]);
1134                         if (DBA::isResult($global_item)) {
1135                                 DBA::update('user-item', ['hidden' => true], ['iid' => $global_item['id'], 'uid' => $item['uid']], true);
1136                         }
1137                 }
1138
1139                 Logger::log('Item with ID ' . $item_id . " has been deleted.", Logger::DEBUG);
1140
1141                 return true;
1142         }
1143
1144         private static function deleteTagsFromItem($item)
1145         {
1146                 if (($item["verb"] != ACTIVITY_TAG) || ($item["object-type"] != ACTIVITY_OBJ_TAGTERM)) {
1147                         return;
1148                 }
1149
1150                 $xo = XML::parseString($item["object"], false);
1151                 $xt = XML::parseString($item["target"], false);
1152
1153                 if ($xt->type != ACTIVITY_OBJ_NOTE) {
1154                         return;
1155                 }
1156
1157                 $i = self::selectFirst(['id', 'contact-id', 'tag'], ['uri' => $xt->id, 'uid' => $item['uid']]);
1158                 if (!DBA::isResult($i)) {
1159                         return;
1160                 }
1161
1162                 // For tags, the owner cannot remove the tag on the author's copy of the post.
1163                 $owner_remove = ($item["contact-id"] == $i["contact-id"]);
1164                 $author_copy = $item["origin"];
1165
1166                 if (($owner_remove && $author_copy) || !$owner_remove) {
1167                         return;
1168                 }
1169
1170                 $tags = explode(',', $i["tag"]);
1171                 $newtags = [];
1172                 if (count($tags)) {
1173                         foreach ($tags as $tag) {
1174                                 if (trim($tag) !== trim($xo->body)) {
1175                                        $newtags[] = trim($tag);
1176                                 }
1177                         }
1178                 }
1179                 self::update(['tag' => implode(',', $newtags)], ['id' => $i["id"]]);
1180         }
1181
1182         private static function guid($item, $notify)
1183         {
1184                 if (!empty($item['guid'])) {
1185                         return Strings::escapeTags(trim($item['guid']));
1186                 }
1187
1188                 if ($notify) {
1189                         // We have to avoid duplicates. So we create the GUID in form of a hash of the plink or uri.
1190                         // We add the hash of our own host because our host is the original creator of the post.
1191                         $prefix_host = \get_app()->getHostName();
1192                 } else {
1193                         $prefix_host = '';
1194
1195                         // We are only storing the post so we create a GUID from the original hostname.
1196                         if (!empty($item['author-link'])) {
1197                                 $parsed = parse_url($item['author-link']);
1198                                 if (!empty($parsed['host'])) {
1199                                         $prefix_host = $parsed['host'];
1200                                 }
1201                         }
1202
1203                         if (empty($prefix_host) && !empty($item['plink'])) {
1204                                 $parsed = parse_url($item['plink']);
1205                                 if (!empty($parsed['host'])) {
1206                                         $prefix_host = $parsed['host'];
1207                                 }
1208                         }
1209
1210                         if (empty($prefix_host) && !empty($item['uri'])) {
1211                                 $parsed = parse_url($item['uri']);
1212                                 if (!empty($parsed['host'])) {
1213                                         $prefix_host = $parsed['host'];
1214                                 }
1215                         }
1216
1217                         // Is it in the format data@host.tld? - Used for mail contacts
1218                         if (empty($prefix_host) && !empty($item['author-link']) && strstr($item['author-link'], '@')) {
1219                                 $mailparts = explode('@', $item['author-link']);
1220                                 $prefix_host = array_pop($mailparts);
1221                         }
1222                 }
1223
1224                 if (!empty($item['plink'])) {
1225                         $guid = self::guidFromUri($item['plink'], $prefix_host);
1226                 } elseif (!empty($item['uri'])) {
1227                         $guid = self::guidFromUri($item['uri'], $prefix_host);
1228                 } else {
1229                         $guid = System::createUUID(hash('crc32', $prefix_host));
1230                 }
1231
1232                 return $guid;
1233         }
1234
1235         private static function contactId($item)
1236         {
1237                 if (!empty($item['contact-id']) && DBA::exists('contact', ['self' => true, 'id' => $item['contact-id']])) {
1238                         return $item['contact-id'];
1239                 } elseif (!empty($item['uid']) && !Contact::isSharing($item['author-id'], $item['uid'])) {
1240                         return $item['author-id'];
1241                 } elseif (!empty($item['contact-id'])) {
1242                         return $item['contact-id'];
1243                 } else {
1244                         $contact_id = Contact::getIdForURL($item['author-link'], $item['uid']);
1245                         if (!empty($contact_id)) {
1246                                 return $contact_id;
1247                         }
1248                 }
1249                 return $item['author-id'];
1250         }
1251
1252         // This function will finally cover most of the preparation functionality in mod/item.php
1253         public static function prepare(&$item)
1254         {
1255                 /*
1256                  * @TODO: Unused code triggering inspection errors
1257                  *
1258                 $data = BBCode::getAttachmentData($item['body']);
1259                 if ((preg_match_all("/\[bookmark\=([^\]]*)\](.*?)\[\/bookmark\]/ism", $item['body'], $match, PREG_SET_ORDER) || isset($data["type"]))
1260                         && ($posttype != Item::PT_PERSONAL_NOTE)) {
1261                         $posttype = Item::PT_PAGE;
1262                         $objecttype = ACTIVITY_OBJ_BOOKMARK;
1263                 }
1264                  */
1265         }
1266
1267         /**
1268          * Write an item array into a spool file to be inserted later.
1269          * This command is called whenever there are issues storing an item.
1270          *
1271          * @param array $item The item fields that are to be inserted
1272          * @throws \Exception
1273          */
1274         private static function spool($orig_item)
1275         {
1276                 // Now we store the data in the spool directory
1277                 // We use "microtime" to keep the arrival order and "mt_rand" to avoid duplicates
1278                 $file = 'item-' . round(microtime(true) * 10000) . '-' . mt_rand() . '.msg';
1279
1280                 $spoolpath = get_spoolpath();
1281                 if ($spoolpath != "") {
1282                         $spool = $spoolpath . '/' . $file;
1283
1284                         file_put_contents($spool, json_encode($orig_item));
1285                         Logger::warning("Item wasn't stored - Item was spooled into file", ['file' => $file]);
1286                 }
1287         }
1288
1289         public static function insert($item, $force_parent = false, $notify = false, $dontcache = false)
1290         {
1291                 $orig_item = $item;
1292
1293                 $priority = PRIORITY_HIGH;
1294
1295                 // If it is a posting where users should get notifications, then define it as wall posting
1296                 if ($notify) {
1297                         $item['wall'] = 1;
1298                         $item['origin'] = 1;
1299                         $item['network'] = Protocol::DFRN;
1300                         $item['protocol'] = Conversation::PARCEL_DFRN;
1301
1302                         if (is_int($notify)) {
1303                                 $priority = $notify;
1304                         }
1305                 } else {
1306                         $item['network'] = trim(defaults($item, 'network', Protocol::PHANTOM));
1307                 }
1308
1309                 $item['guid'] = self::guid($item, $notify);
1310                 $item['uri'] = Strings::escapeTags(trim(defaults($item, 'uri', self::newURI($item['uid'], $item['guid']))));
1311
1312                 // Store URI data
1313                 $item['uri-id'] = ItemURI::insert(['uri' => $item['uri'], 'guid' => $item['guid']]);
1314
1315                 // Store conversation data
1316                 $item = Conversation::insert($item);
1317
1318                 /*
1319                  * If a Diaspora signature structure was passed in, pull it out of the
1320                  * item array and set it aside for later storage.
1321                  */
1322
1323                 $dsprsig = null;
1324                 if (isset($item['dsprsig'])) {
1325                         $encoded_signature = $item['dsprsig'];
1326                         $dsprsig = json_decode(base64_decode($item['dsprsig']));
1327                         unset($item['dsprsig']);
1328                 }
1329
1330                 $diaspora_signed_text = '';
1331                 if (isset($item['diaspora_signed_text'])) {
1332                         $diaspora_signed_text = $item['diaspora_signed_text'];
1333                         unset($item['diaspora_signed_text']);
1334                 }
1335
1336                 // Converting the plink
1337                 /// @TODO Check if this is really still needed
1338                 if ($item['network'] == Protocol::OSTATUS) {
1339                         if (isset($item['plink'])) {
1340                                 $item['plink'] = OStatus::convertHref($item['plink']);
1341                         } elseif (isset($item['uri'])) {
1342                                 $item['plink'] = OStatus::convertHref($item['uri']);
1343                         }
1344                 }
1345
1346                 if (!empty($item['thr-parent'])) {
1347                         $item['parent-uri'] = $item['thr-parent'];
1348                 }
1349
1350                 if (isset($item['gravity'])) {
1351                         $item['gravity'] = intval($item['gravity']);
1352                 } elseif ($item['parent-uri'] === $item['uri']) {
1353                         $item['gravity'] = GRAVITY_PARENT;
1354                 } elseif (activity_match($item['verb'], ACTIVITY_POST)) {
1355                         $item['gravity'] = GRAVITY_COMMENT;
1356                 } elseif (activity_match($item['verb'], ACTIVITY_FOLLOW)) {
1357                         $item['gravity'] = GRAVITY_ACTIVITY;
1358                 } else {
1359                         $item['gravity'] = GRAVITY_UNKNOWN;   // Should not happen
1360                         Logger::log('Unknown gravity for verb: ' . $item['verb'], Logger::DEBUG);
1361                 }
1362
1363                 $uid = intval($item['uid']);
1364
1365                 // check for create date and expire time
1366                 $expire_interval = Config::get('system', 'dbclean-expire-days', 0);
1367
1368                 $user = DBA::selectFirst('user', ['expire'], ['uid' => $uid]);
1369                 if (DBA::isResult($user) && ($user['expire'] > 0) && (($user['expire'] < $expire_interval) || ($expire_interval == 0))) {
1370                         $expire_interval = $user['expire'];
1371                 }
1372
1373                 if (($expire_interval > 0) && !empty($item['created'])) {
1374                         $expire_date = time() - ($expire_interval * 86400);
1375                         $created_date = strtotime($item['created']);
1376                         if ($created_date < $expire_date) {
1377                                 Logger::notice('Item created before expiration interval.', [
1378                                         'created' => date('c', $created_date),
1379                                         'expired' => date('c', $expire_date),
1380                                         '$item' => $item
1381                                 ]);
1382                                 return 0;
1383                         }
1384                 }
1385
1386                 /*
1387                  * Do we already have this item?
1388                  * We have to check several networks since Friendica posts could be repeated
1389                  * via OStatus (maybe Diasporsa as well)
1390                  */
1391                 if (empty($item['network']) || in_array($item['network'], Protocol::FEDERATED)) {
1392                         $condition = ["`uri` = ? AND `uid` = ? AND `network` IN (?, ?, ?)",
1393                                 trim($item['uri']), $item['uid'],
1394                                 Protocol::DIASPORA, Protocol::DFRN, Protocol::OSTATUS];
1395                         $existing = self::selectFirst(['id', 'network'], $condition);
1396                         if (DBA::isResult($existing)) {
1397                                 // We only log the entries with a different user id than 0. Otherwise we would have too many false positives
1398                                 if ($uid != 0) {
1399                                         Logger::notice('Item already existed for user', [
1400                                                 'uri' => $item['uri'],
1401                                                 'uid' => $uid,
1402                                                 'network' => $item['network'],
1403                                                 'existing_id' => $existing["id"],
1404                                                 'existing_network' => $existing["network"]
1405                                         ]);
1406                                 }
1407
1408                                 return $existing["id"];
1409                         }
1410                 }
1411
1412                 $item['wall']          = intval(defaults($item, 'wall', 0));
1413                 $item['extid']         = trim(defaults($item, 'extid', ''));
1414                 $item['author-name']   = trim(defaults($item, 'author-name', ''));
1415                 $item['author-link']   = trim(defaults($item, 'author-link', ''));
1416                 $item['author-avatar'] = trim(defaults($item, 'author-avatar', ''));
1417                 $item['owner-name']    = trim(defaults($item, 'owner-name', ''));
1418                 $item['owner-link']    = trim(defaults($item, 'owner-link', ''));
1419                 $item['owner-avatar']  = trim(defaults($item, 'owner-avatar', ''));
1420                 $item['received']      = (isset($item['received'])  ? DateTimeFormat::utc($item['received'])  : DateTimeFormat::utcNow());
1421                 $item['created']       = (isset($item['created'])   ? DateTimeFormat::utc($item['created'])   : $item['received']);
1422                 $item['edited']        = (isset($item['edited'])    ? DateTimeFormat::utc($item['edited'])    : $item['created']);
1423                 $item['changed']       = (isset($item['changed'])   ? DateTimeFormat::utc($item['changed'])   : $item['created']);
1424                 $item['commented']     = (isset($item['commented']) ? DateTimeFormat::utc($item['commented']) : $item['created']);
1425                 $item['title']         = trim(defaults($item, 'title', ''));
1426                 $item['location']      = trim(defaults($item, 'location', ''));
1427                 $item['coord']         = trim(defaults($item, 'coord', ''));
1428                 $item['visible']       = (isset($item['visible']) ? intval($item['visible']) : 1);
1429                 $item['deleted']       = 0;
1430                 $item['parent-uri']    = trim(defaults($item, 'parent-uri', $item['uri']));
1431                 $item['post-type']     = defaults($item, 'post-type', self::PT_ARTICLE);
1432                 $item['verb']          = trim(defaults($item, 'verb', ''));
1433                 $item['object-type']   = trim(defaults($item, 'object-type', ''));
1434                 $item['object']        = trim(defaults($item, 'object', ''));
1435                 $item['target-type']   = trim(defaults($item, 'target-type', ''));
1436                 $item['target']        = trim(defaults($item, 'target', ''));
1437                 $item['plink']         = trim(defaults($item, 'plink', ''));
1438                 $item['allow_cid']     = trim(defaults($item, 'allow_cid', ''));
1439                 $item['allow_gid']     = trim(defaults($item, 'allow_gid', ''));
1440                 $item['deny_cid']      = trim(defaults($item, 'deny_cid', ''));
1441                 $item['deny_gid']      = trim(defaults($item, 'deny_gid', ''));
1442                 $item['private']       = intval(defaults($item, 'private', 0));
1443                 $item['body']          = trim(defaults($item, 'body', ''));
1444                 $item['tag']           = trim(defaults($item, 'tag', ''));
1445                 $item['attach']        = trim(defaults($item, 'attach', ''));
1446                 $item['app']           = trim(defaults($item, 'app', ''));
1447                 $item['origin']        = intval(defaults($item, 'origin', 0));
1448                 $item['postopts']      = trim(defaults($item, 'postopts', ''));
1449                 $item['resource-id']   = trim(defaults($item, 'resource-id', ''));
1450                 $item['event-id']      = intval(defaults($item, 'event-id', 0));
1451                 $item['inform']        = trim(defaults($item, 'inform', ''));
1452                 $item['file']          = trim(defaults($item, 'file', ''));
1453
1454                 // When there is no content then we don't post it
1455                 if ($item['body'].$item['title'] == '') {
1456                         Logger::notice('No body, no title.');
1457                         return 0;
1458                 }
1459
1460                 self::addLanguageToItemArray($item);
1461
1462                 // Items cannot be stored before they happen ...
1463                 if ($item['created'] > DateTimeFormat::utcNow()) {
1464                         $item['created'] = DateTimeFormat::utcNow();
1465                 }
1466
1467                 // We haven't invented time travel by now.
1468                 if ($item['edited'] > DateTimeFormat::utcNow()) {
1469                         $item['edited'] = DateTimeFormat::utcNow();
1470                 }
1471
1472                 $item['plink'] = defaults($item, 'plink', System::baseUrl() . '/display/' . urlencode($item['guid']));
1473
1474                 $default = ['url' => $item['author-link'], 'name' => $item['author-name'],
1475                         'photo' => $item['author-avatar'], 'network' => $item['network']];
1476
1477                 $item['author-id'] = defaults($item, 'author-id', Contact::getIdForURL($item['author-link'], 0, false, $default));
1478
1479                 if (Contact::isBlocked($item['author-id'])) {
1480                         Logger::notice('Author is blocked node-wide', ['author-link' => $item['author-link'], 'item-uri' => $item['uri']]);
1481                         return 0;
1482                 }
1483
1484                 if (!empty($item['author-link']) && Network::isUrlBlocked($item['author-link'])) {
1485                         Logger::notice('Author server is blocked', ['author-link' => $item['author-link'], 'item-uri' => $item['uri']]);
1486                         return 0;
1487                 }
1488
1489                 if (!empty($uid) && Contact::isBlockedByUser($item['author-id'], $uid)) {
1490                         Logger::notice('Author is blocked by user', ['author-link' => $item['author-link'], 'uid' => $uid, 'item-uri' => $item['uri']]);
1491                         return 0;
1492                 }
1493
1494                 $default = ['url' => $item['owner-link'], 'name' => $item['owner-name'],
1495                         'photo' => $item['owner-avatar'], 'network' => $item['network']];
1496
1497                 $item['owner-id'] = defaults($item, 'owner-id', Contact::getIdForURL($item['owner-link'], 0, false, $default));
1498
1499                 if (Contact::isBlocked($item['owner-id'])) {
1500                         Logger::notice('Owner is blocked node-wide', ['owner-link' => $item['owner-link'], 'item-uri' => $item['uri']]);
1501                         return 0;
1502                 }
1503
1504                 if (!empty($item['owner-link']) && Network::isUrlBlocked($item['owner-link'])) {
1505                         Logger::notice('Owner server is blocked', ['owner-link' => $item['owner-link'], 'item-uri' => $item['uri']]);
1506                         return 0;
1507                 }
1508
1509                 if (!empty($uid) && Contact::isBlockedByUser($item['owner-id'], $uid)) {
1510                         Logger::notice('Owner is blocked by user', ['owner-link' => $item['owner-link'], 'uid' => $uid, 'item-uri' => $item['uri']]);
1511                         return 0;
1512                 }
1513
1514                 // The causer is set during a thread completion, for example because of a reshare. It countains the responsible actor.
1515                 if (!empty($uid) && !empty($item['causer-id']) && Contact::isBlockedByUser($item['causer-id'], $uid)) {
1516                         Logger::notice('Causer is blocked by user', ['causer-link' => $item['causer-link'], 'uid' => $uid, 'item-uri' => $item['uri']]);
1517                         return 0;
1518                 }
1519
1520                 if (!empty($uid) && !empty($item['causer-id']) && ($item['parent-uri'] == $item['uri']) && Contact::isIgnoredByUser($item['causer-id'], $uid)) {
1521                         Logger::notice('Causer is ignored by user', ['causer-link' => $item['causer-link'], 'uid' => $uid, 'item-uri' => $item['uri']]);
1522                         return 0;
1523                 }
1524
1525                 // We don't store the causer, we only have it here for the checks above
1526                 unset($item['causer-id']);
1527                 unset($item['causer-link']);
1528
1529                 // The contact-id should be set before "self::insert" was called - but there seems to be issues sometimes
1530                 $item["contact-id"] = self::contactId($item);
1531
1532                 if ($item['network'] == Protocol::PHANTOM) {
1533                         $item['network'] = Protocol::DFRN;
1534                         Logger::notice('Missing network, setting to {network}.', [
1535                                 'uri' => $item["uri"],
1536                                 'network' => $item['network'],
1537                                 'callstack' => System::callstack()
1538                         ]);
1539                 }
1540
1541                 // Checking if there is already an item with the same guid
1542                 $condition = ['guid' => $item['guid'], 'network' => $item['network'], 'uid' => $item['uid']];
1543                 if (self::exists($condition)) {
1544                         Logger::notice('Found already existing item', [
1545                                 'guid' => $item['guid'],
1546                                 'uid' => $item['uid'],
1547                                 'network' => $item['network']
1548                         ]);
1549                         return 0;
1550                 }
1551
1552                 if ($item['verb'] == ACTIVITY_FOLLOW) {
1553                         if (!$item['origin'] && ($item['author-id'] == Contact::getPublicIdByUserId($uid))) {
1554                                 // Our own follow request can be relayed to us. We don't store it to avoid notification chaos.
1555                                 Logger::log("Follow: Don't store not origin follow request from us for " . $item['parent-uri'], Logger::DEBUG);
1556                                 return 0;
1557                         }
1558
1559                         $condition = ['verb' => ACTIVITY_FOLLOW, 'uid' => $item['uid'],
1560                                 'parent-uri' => $item['parent-uri'], 'author-id' => $item['author-id']];
1561                         if (self::exists($condition)) {
1562                                 // It happens that we receive multiple follow requests by the same author - we only store one.
1563                                 Logger::log('Follow: Found existing follow request from author ' . $item['author-id'] . ' for ' . $item['parent-uri'], Logger::DEBUG);
1564                                 return 0;
1565                         }
1566                 }
1567
1568                 // Check for hashtags in the body and repair or add hashtag links
1569                 self::setHashtags($item);
1570
1571                 $item['thr-parent'] = $item['parent-uri'];
1572
1573                 $notify_type = Delivery::POST;
1574                 $allow_cid = '';
1575                 $allow_gid = '';
1576                 $deny_cid  = '';
1577                 $deny_gid  = '';
1578
1579                 if ($item['parent-uri'] === $item['uri']) {
1580                         $parent_id = 0;
1581                         $parent_deleted = 0;
1582                         $allow_cid = $item['allow_cid'];
1583                         $allow_gid = $item['allow_gid'];
1584                         $deny_cid  = $item['deny_cid'];
1585                         $deny_gid  = $item['deny_gid'];
1586                 } else {
1587                         // find the parent and snarf the item id and ACLs
1588                         // and anything else we need to inherit
1589
1590                         $fields = ['uri', 'parent-uri', 'id', 'deleted',
1591                                 'allow_cid', 'allow_gid', 'deny_cid', 'deny_gid',
1592                                 'wall', 'private', 'forum_mode', 'origin'];
1593                         $condition = ['uri' => $item['parent-uri'], 'uid' => $item['uid']];
1594                         $params = ['order' => ['id' => false]];
1595                         $parent = self::selectFirst($fields, $condition, $params);
1596
1597                         if (DBA::isResult($parent)) {
1598                                 // is the new message multi-level threaded?
1599                                 // even though we don't support it now, preserve the info
1600                                 // and re-attach to the conversation parent.
1601
1602                                 if ($parent['uri'] != $parent['parent-uri']) {
1603                                         $item['parent-uri'] = $parent['parent-uri'];
1604
1605                                         $condition = ['uri' => $item['parent-uri'],
1606                                                 'parent-uri' => $item['parent-uri'],
1607                                                 'uid' => $item['uid']];
1608                                         $params = ['order' => ['id' => false]];
1609                                         $toplevel_parent = self::selectFirst($fields, $condition, $params);
1610
1611                                         if (DBA::isResult($toplevel_parent)) {
1612                                                 $parent = $toplevel_parent;
1613                                         }
1614                                 }
1615
1616                                 $parent_id      = $parent['id'];
1617                                 $parent_deleted = $parent['deleted'];
1618                                 $allow_cid      = $parent['allow_cid'];
1619                                 $allow_gid      = $parent['allow_gid'];
1620                                 $deny_cid       = $parent['deny_cid'];
1621                                 $deny_gid       = $parent['deny_gid'];
1622                                 $item['wall']   = $parent['wall'];
1623
1624                                 /*
1625                                  * If the parent is private, force privacy for the entire conversation
1626                                  * This differs from the above settings as it subtly allows comments from
1627                                  * email correspondents to be private even if the overall thread is not.
1628                                  */
1629                                 if ($parent['private']) {
1630                                         $item['private'] = $parent['private'];
1631                                 }
1632
1633                                 /*
1634                                  * Edge case. We host a public forum that was originally posted to privately.
1635                                  * The original author commented, but as this is a comment, the permissions
1636                                  * weren't fixed up so it will still show the comment as private unless we fix it here.
1637                                  */
1638                                 if ((intval($parent['forum_mode']) == 1) && $parent['private']) {
1639                                         $item['private'] = 0;
1640                                 }
1641
1642                                 // If its a post that originated here then tag the thread as "mention"
1643                                 if ($item['origin'] && $item['uid']) {
1644                                         DBA::update('thread', ['mention' => true], ['iid' => $parent_id]);
1645                                         Logger::log('tagged thread ' . $parent_id . ' as mention for user ' . $item['uid'], Logger::DEBUG);
1646                                 }
1647                         } else {
1648                                 /*
1649                                  * Allow one to see reply tweets from status.net even when
1650                                  * we don't have or can't see the original post.
1651                                  */
1652                                 if ($force_parent) {
1653                                         Logger::log('$force_parent=true, reply converted to top-level post.');
1654                                         $parent_id = 0;
1655                                         $item['parent-uri'] = $item['uri'];
1656                                         $item['gravity'] = GRAVITY_PARENT;
1657                                 } else {
1658                                         Logger::log('item parent '.$item['parent-uri'].' for '.$item['uid'].' was not found - ignoring item');
1659                                         return 0;
1660                                 }
1661
1662                                 $parent_deleted = 0;
1663                         }
1664                 }
1665
1666                 if (stristr($item['verb'], ACTIVITY_POKE)) {
1667                         $notify_type = Delivery::POKE;
1668                 }
1669
1670                 $item['parent-uri-id'] = ItemURI::getIdByURI($item['parent-uri']);
1671                 $item['thr-parent-id'] = ItemURI::getIdByURI($item['thr-parent']);
1672
1673                 $condition = ["`uri` = ? AND `network` IN (?, ?) AND `uid` = ?",
1674                         $item['uri'], $item['network'], Protocol::DFRN, $item['uid']];
1675                 if (self::exists($condition)) {
1676                         Logger::log('duplicated item with the same uri found. '.print_r($item,true));
1677                         return 0;
1678                 }
1679
1680                 // On Friendica and Diaspora the GUID is unique
1681                 if (in_array($item['network'], [Protocol::DFRN, Protocol::DIASPORA])) {
1682                         $condition = ['guid' => $item['guid'], 'uid' => $item['uid']];
1683                         if (self::exists($condition)) {
1684                                 Logger::log('duplicated item with the same guid found. '.print_r($item,true));
1685                                 return 0;
1686                         }
1687                 } elseif ($item['network'] == Protocol::OSTATUS) {
1688                         // Check for an existing post with the same content. There seems to be a problem with OStatus.
1689                         $condition = ["`body` = ? AND `network` = ? AND `created` = ? AND `contact-id` = ? AND `uid` = ?",
1690                                         $item['body'], $item['network'], $item['created'], $item['contact-id'], $item['uid']];
1691                         if (self::exists($condition)) {
1692                                 Logger::log('duplicated item with the same body found. '.print_r($item,true));
1693                                 return 0;
1694                         }
1695                 }
1696
1697                 // Is this item available in the global items (with uid=0)?
1698                 if ($item["uid"] == 0) {
1699                         $item["global"] = true;
1700
1701                         // Set the global flag on all items if this was a global item entry
1702                         DBA::update('item', ['global' => true], ['uri' => $item["uri"]]);
1703                 } else {
1704                         $item["global"] = self::exists(['uid' => 0, 'uri' => $item["uri"]]);
1705                 }
1706
1707                 // ACL settings
1708                 if (strlen($allow_cid) || strlen($allow_gid) || strlen($deny_cid) || strlen($deny_gid)) {
1709                         $private = 1;
1710                 } else {
1711                         $private = $item['private'];
1712                 }
1713
1714                 $item["allow_cid"] = $allow_cid;
1715                 $item["allow_gid"] = $allow_gid;
1716                 $item["deny_cid"] = $deny_cid;
1717                 $item["deny_gid"] = $deny_gid;
1718                 $item["private"] = $private;
1719                 $item["deleted"] = $parent_deleted;
1720
1721                 // Fill the cache field
1722                 self::putInCache($item);
1723
1724                 if ($notify) {
1725                         $item['edit'] = false;
1726                         $item['parent'] = $parent_id;
1727                         Hook::callAll('post_local', $item);
1728                         unset($item['edit']);
1729                         unset($item['parent']);
1730                 } else {
1731                         Hook::callAll('post_remote', $item);
1732                 }
1733
1734                 // This array field is used to trigger some automatic reactions
1735                 // It is mainly used in the "post_local" hook.
1736                 unset($item['api_source']);
1737
1738                 if (!empty($item['cancel'])) {
1739                         Logger::log('post cancelled by addon.');
1740                         return 0;
1741                 }
1742
1743                 /*
1744                  * Check for already added items.
1745                  * There is a timing issue here that sometimes creates double postings.
1746                  * An unique index would help - but the limitations of MySQL (maximum size of index values) prevent this.
1747                  */
1748                 if ($item["uid"] == 0) {
1749                         if (self::exists(['uri' => trim($item['uri']), 'uid' => 0])) {
1750                                 Logger::log('Global item already stored. URI: '.$item['uri'].' on network '.$item['network'], Logger::DEBUG);
1751                                 return 0;
1752                         }
1753                 }
1754
1755                 Logger::log('' . print_r($item,true), Logger::DATA);
1756
1757                 if (array_key_exists('tag', $item)) {
1758                         $tags = $item['tag'];
1759                         unset($item['tag']);
1760                 } else {
1761                         $tags = '';
1762                 }
1763
1764                 if (array_key_exists('file', $item)) {
1765                         $files = $item['file'];
1766                         unset($item['file']);
1767                 } else {
1768                         $files = '';
1769                 }
1770
1771                 // Creates or assigns the permission set
1772                 $item['psid'] = PermissionSet::fetchIDForPost($item);
1773
1774                 // We are doing this outside of the transaction to avoid timing problems
1775                 if (!self::insertActivity($item)) {
1776                         self::insertContent($item);
1777                 }
1778
1779                 $delivery_data = ItemDeliveryData::extractFields($item);
1780
1781                 unset($item['postopts']);
1782                 unset($item['inform']);
1783
1784                 // These fields aren't stored anymore in the item table, they are fetched upon request
1785                 unset($item['author-link']);
1786                 unset($item['author-name']);
1787                 unset($item['author-avatar']);
1788                 unset($item['author-network']);
1789
1790                 unset($item['owner-link']);
1791                 unset($item['owner-name']);
1792                 unset($item['owner-avatar']);
1793
1794                 DBA::transaction();
1795                 $ret = DBA::insert('item', $item);
1796
1797                 // When the item was successfully stored we fetch the ID of the item.
1798                 if (DBA::isResult($ret)) {
1799                         $current_post = DBA::lastInsertId();
1800                 } else {
1801                         // This can happen - for example - if there are locking timeouts.
1802                         DBA::rollback();
1803
1804                         // Store the data into a spool file so that we can try again later.
1805                         self::spool($orig_item);
1806                         return 0;
1807                 }
1808
1809                 if ($current_post == 0) {
1810                         // This is one of these error messages that never should occur.
1811                         Logger::log("couldn't find created item - we better quit now.");
1812                         DBA::rollback();
1813                         return 0;
1814                 }
1815
1816                 // How much entries have we created?
1817                 // We wouldn't need this query when we could use an unique index - but MySQL has length problems with them.
1818                 $entries = DBA::count('item', ['uri' => $item['uri'], 'uid' => $item['uid'], 'network' => $item['network']]);
1819
1820                 if ($entries > 1) {
1821                         // There are duplicates. We delete our just created entry.
1822                         Logger::log('Duplicated post occurred. uri = ' . $item['uri'] . ' uid = ' . $item['uid']);
1823
1824                         // Yes, we could do a rollback here - but we are having many users with MyISAM.
1825                         DBA::delete('item', ['id' => $current_post]);
1826                         DBA::commit();
1827                         return 0;
1828                 } elseif ($entries == 0) {
1829                         // This really should never happen since we quit earlier if there were problems.
1830                         Logger::log("Something is terribly wrong. We haven't found our created entry.");
1831                         DBA::rollback();
1832                         return 0;
1833                 }
1834
1835                 Logger::log('created item '.$current_post);
1836                 self::updateContact($item);
1837
1838                 if (!$parent_id || ($item['parent-uri'] === $item['uri'])) {
1839                         $parent_id = $current_post;
1840                 }
1841
1842                 // Set parent id
1843                 DBA::update('item', ['parent' => $parent_id], ['id' => $current_post]);
1844
1845                 $item['id'] = $current_post;
1846                 $item['parent'] = $parent_id;
1847
1848                 // update the commented timestamp on the parent
1849                 // Only update "commented" if it is really a comment
1850                 if (($item['gravity'] != GRAVITY_ACTIVITY) || !Config::get("system", "like_no_comment")) {
1851                         DBA::update('item', ['commented' => DateTimeFormat::utcNow(), 'changed' => DateTimeFormat::utcNow()], ['id' => $parent_id]);
1852                 } else {
1853                         DBA::update('item', ['changed' => DateTimeFormat::utcNow()], ['id' => $parent_id]);
1854                 }
1855
1856                 if ($dsprsig) {
1857                         /*
1858                          * Friendica servers lower than 3.4.3-2 had double encoded the signature ...
1859                          * We can check for this condition when we decode and encode the stuff again.
1860                          */
1861                         if (base64_encode(base64_decode(base64_decode($dsprsig->signature))) == base64_decode($dsprsig->signature)) {
1862                                 $dsprsig->signature = base64_decode($dsprsig->signature);
1863                                 Logger::log("Repaired double encoded signature from handle ".$dsprsig->signer, Logger::DEBUG);
1864                         }
1865
1866                         if (!empty($dsprsig->signed_text) && empty($dsprsig->signature) && empty($dsprsig->signer)) {
1867                                 DBA::insert('diaspora-interaction', ['uri-id' => $item['uri-id'], 'interaction' => $dsprsig->signed_text], true);
1868                         } else {
1869                                 // The other fields are used by very old Friendica servers, so we currently store them differently
1870                                 DBA::insert('sign', ['iid' => $current_post, 'signed_text' => $dsprsig->signed_text,
1871                                         'signature' => $dsprsig->signature, 'signer' => $dsprsig->signer]);
1872                         }
1873                 }
1874
1875                 if (!empty($diaspora_signed_text)) {
1876                         DBA::insert('diaspora-interaction', ['uri-id' => $item['uri-id'], 'interaction' => $diaspora_signed_text], true);
1877                 }
1878
1879                 // In that function we check if this is a forum post. Additionally we delete the item under certain circumstances
1880                 if (self::tagDeliver($item['uid'], $current_post)) {
1881                         // Get the user information for the logging
1882                         $user = User::getById($uid);
1883
1884                         Logger::notice('Item had been deleted', ['id' => $current_post, 'user' => $uid, 'account-type' => $user['account-type']]);
1885                         return 0;
1886                 }
1887
1888                 /*
1889                  * current post can be deleted if is for a community page and no mention are
1890                  * in it.
1891                  */
1892                 if (!$dontcache) {
1893                         $posted_item = self::selectFirst(self::ITEM_FIELDLIST, ['id' => $current_post]);
1894                         if (DBA::isResult($posted_item)) {
1895                                 if ($notify) {
1896                                         Hook::callAll('post_local_end', $posted_item);
1897                                 } else {
1898                                         Hook::callAll('post_remote_end', $posted_item);
1899                                 }
1900                         } else {
1901                                 Logger::log('new item not found in DB, id ' . $current_post);
1902                         }
1903                 }
1904
1905                 if ($item['parent-uri'] === $item['uri']) {
1906                         self::addThread($current_post);
1907                 } else {
1908                         self::updateThread($parent_id);
1909                 }
1910
1911                 if (!empty($item['origin']) || !empty($item['wall']) || !empty($delivery_data['postopts']) || !empty($delivery_data['inform'])) {
1912                         ItemDeliveryData::insert($current_post, $delivery_data);
1913                 }
1914
1915                 DBA::commit();
1916
1917                 /*
1918                  * Due to deadlock issues with the "term" table we are doing these steps after the commit.
1919                  * This is not perfect - but a workable solution until we found the reason for the problem.
1920                  */
1921                 if (!empty($tags)) {
1922                         Term::insertFromTagFieldByItemId($current_post, $tags);
1923                 }
1924
1925                 if (!empty($files)) {
1926                         Term::insertFromFileFieldByItemId($current_post, $files);
1927                 }
1928
1929                 if ($item['parent-uri'] === $item['uri']) {
1930                         self::addShadow($current_post);
1931                 } else {
1932                         self::addShadowPost($current_post);
1933                 }
1934
1935                 check_user_notification($current_post);
1936
1937                 if ($notify || ($item['visible'] && ((!empty($parent) && $parent['origin']) || $item['origin']))) {
1938                         Worker::add(['priority' => $priority, 'dont_fork' => true], 'Notifier', $notify_type, $current_post);
1939                 }
1940
1941                 return $current_post;
1942         }
1943
1944         /**
1945          * @brief Insert a new item content entry
1946          *
1947          * @param array $item The item fields that are to be inserted
1948          * @return bool
1949          * @throws \Exception
1950          */
1951         private static function insertActivity(&$item)
1952         {
1953                 $activity_index = self::activityToIndex($item['verb']);
1954
1955                 if ($activity_index < 0) {
1956                         return false;
1957                 }
1958
1959                 $fields = ['activity' => $activity_index, 'uri-hash' => (string)$item['uri-id'], 'uri-id' => $item['uri-id']];
1960
1961                 // We just remove everything that is content
1962                 foreach (array_merge(self::CONTENT_FIELDLIST, self::MIXED_CONTENT_FIELDLIST) as $field) {
1963                         unset($item[$field]);
1964                 }
1965
1966                 // To avoid timing problems, we are using locks.
1967                 $locked = Lock::acquire('item_insert_activity');
1968                 if (!$locked) {
1969                         Logger::log("Couldn't acquire lock for URI " . $item['uri'] . " - proceeding anyway.");
1970                 }
1971
1972                 // Do we already have this content?
1973                 $item_activity = DBA::selectFirst('item-activity', ['id'], ['uri-id' => $item['uri-id']]);
1974                 if (DBA::isResult($item_activity)) {
1975                         $item['iaid'] = $item_activity['id'];
1976                         Logger::log('Fetched activity for URI ' . $item['uri'] . ' (' . $item['iaid'] . ')');
1977                 } elseif (DBA::insert('item-activity', $fields)) {
1978                         $item['iaid'] = DBA::lastInsertId();
1979                         Logger::log('Inserted activity for URI ' . $item['uri'] . ' (' . $item['iaid'] . ')');
1980                 } else {
1981                         // This shouldn't happen.
1982                         Logger::log('Could not insert activity for URI ' . $item['uri'] . ' - should not happen');
1983                         Lock::release('item_insert_activity');
1984                         return false;
1985                 }
1986                 if ($locked) {
1987                         Lock::release('item_insert_activity');
1988                 }
1989                 return true;
1990         }
1991
1992         /**
1993          * @brief Insert a new item content entry
1994          *
1995          * @param array $item The item fields that are to be inserted
1996          * @throws \Exception
1997          */
1998         private static function insertContent(&$item)
1999         {
2000                 $fields = ['uri-plink-hash' => (string)$item['uri-id'], 'uri-id' => $item['uri-id']];
2001
2002                 foreach (array_merge(self::CONTENT_FIELDLIST, self::MIXED_CONTENT_FIELDLIST) as $field) {
2003                         if (isset($item[$field])) {
2004                                 $fields[$field] = $item[$field];
2005                                 unset($item[$field]);
2006                         }
2007                 }
2008
2009                 // To avoid timing problems, we are using locks.
2010                 $locked = Lock::acquire('item_insert_content');
2011                 if (!$locked) {
2012                         Logger::log("Couldn't acquire lock for URI " . $item['uri'] . " - proceeding anyway.");
2013                 }
2014
2015                 // Do we already have this content?
2016                 $item_content = DBA::selectFirst('item-content', ['id'], ['uri-id' => $item['uri-id']]);
2017                 if (DBA::isResult($item_content)) {
2018                         $item['icid'] = $item_content['id'];
2019                         Logger::log('Fetched content for URI ' . $item['uri'] . ' (' . $item['icid'] . ')');
2020                 } elseif (DBA::insert('item-content', $fields)) {
2021                         $item['icid'] = DBA::lastInsertId();
2022                         Logger::log('Inserted content for URI ' . $item['uri'] . ' (' . $item['icid'] . ')');
2023                 } else {
2024                         // This shouldn't happen.
2025                         Logger::log('Could not insert content for URI ' . $item['uri'] . ' - should not happen');
2026                 }
2027                 if ($locked) {
2028                         Lock::release('item_insert_content');
2029                 }
2030         }
2031
2032         /**
2033          * @brief Update existing item content entries
2034          *
2035          * @param array $item      The item fields that are to be changed
2036          * @param array $condition The condition for finding the item content entries
2037          * @return bool
2038          * @throws \Exception
2039          */
2040         private static function updateActivity($item, $condition)
2041         {
2042                 if (empty($item['verb'])) {
2043                         return false;
2044                 }
2045                 $activity_index = self::activityToIndex($item['verb']);
2046
2047                 if ($activity_index < 0) {
2048                         return false;
2049                 }
2050
2051                 $fields = ['activity' => $activity_index];
2052
2053                 Logger::log('Update activity for ' . json_encode($condition));
2054
2055                 DBA::update('item-activity', $fields, $condition, true);
2056
2057                 return true;
2058         }
2059
2060         /**
2061          * @brief Update existing item content entries
2062          *
2063          * @param array $item      The item fields that are to be changed
2064          * @param array $condition The condition for finding the item content entries
2065          * @throws \Exception
2066          */
2067         private static function updateContent($item, $condition)
2068         {
2069                 // We have to select only the fields from the "item-content" table
2070                 $fields = [];
2071                 foreach (array_merge(self::CONTENT_FIELDLIST, self::MIXED_CONTENT_FIELDLIST) as $field) {
2072                         if (isset($item[$field])) {
2073                                 $fields[$field] = $item[$field];
2074                         }
2075                 }
2076
2077                 if (empty($fields)) {
2078                         // when there are no fields at all, just use the condition
2079                         // This is to ensure that we always store content.
2080                         $fields = $condition;
2081                 }
2082
2083                 Logger::log('Update content for ' . json_encode($condition));
2084
2085                 DBA::update('item-content', $fields, $condition, true);
2086         }
2087
2088         /**
2089          * @brief Distributes public items to the receivers
2090          *
2091          * @param integer $itemid      Item ID that should be added
2092          * @param string  $signed_text Original text (for Diaspora signatures), JSON encoded.
2093          * @throws \Exception
2094          */
2095         public static function distribute($itemid, $signed_text = '')
2096         {
2097                 $condition = ["`id` IN (SELECT `parent` FROM `item` WHERE `id` = ?)", $itemid];
2098                 $parent = self::selectFirst(['owner-id'], $condition);
2099                 if (!DBA::isResult($parent)) {
2100                         return;
2101                 }
2102
2103                 // Only distribute public items from native networks
2104                 $condition = ['id' => $itemid, 'uid' => 0,
2105                         'network' => array_merge(Protocol::FEDERATED ,['']),
2106                         'visible' => true, 'deleted' => false, 'moderated' => false, 'private' => false];
2107                 $item = self::selectFirst(self::ITEM_FIELDLIST, $condition);
2108                 if (!DBA::isResult($item)) {
2109                         return;
2110                 }
2111
2112                 $origin = $item['origin'];
2113
2114                 unset($item['id']);
2115                 unset($item['parent']);
2116                 unset($item['mention']);
2117                 unset($item['wall']);
2118                 unset($item['origin']);
2119                 unset($item['starred']);
2120
2121                 $users = [];
2122
2123                 /// @todo add a field "pcid" in the contact table that referrs to the public contact id.
2124                 $owner = DBA::selectFirst('contact', ['url', 'nurl', 'alias'], ['id' => $parent['owner-id']]);
2125                 if (!DBA::isResult($owner)) {
2126                         return;
2127                 }
2128
2129                 $condition = ['nurl' => $owner['nurl'], 'rel' => [Contact::SHARING, Contact::FRIEND]];
2130                 $contacts = DBA::select('contact', ['uid'], $condition);
2131                 while ($contact = DBA::fetch($contacts)) {
2132                         if ($contact['uid'] == 0) {
2133                                 continue;
2134                         }
2135
2136                         $users[$contact['uid']] = $contact['uid'];
2137                 }
2138                 DBA::close($contacts);
2139
2140                 $condition = ['alias' => $owner['url'], 'rel' => [Contact::SHARING, Contact::FRIEND]];
2141                 $contacts = DBA::select('contact', ['uid'], $condition);
2142                 while ($contact = DBA::fetch($contacts)) {
2143                         if ($contact['uid'] == 0) {
2144                                 continue;
2145                         }
2146
2147                         $users[$contact['uid']] = $contact['uid'];
2148                 }
2149                 DBA::close($contacts);
2150
2151                 if (!empty($owner['alias'])) {
2152                         $condition = ['url' => $owner['alias'], 'rel' => [Contact::SHARING, Contact::FRIEND]];
2153                         $contacts = DBA::select('contact', ['uid'], $condition);
2154                         while ($contact = DBA::fetch($contacts)) {
2155                                 if ($contact['uid'] == 0) {
2156                                         continue;
2157                                 }
2158
2159                                 $users[$contact['uid']] = $contact['uid'];
2160                         }
2161                         DBA::close($contacts);
2162                 }
2163
2164                 $origin_uid = 0;
2165
2166                 if ($item['uri'] != $item['parent-uri']) {
2167                         $parents = self::select(['uid', 'origin'], ["`uri` = ? AND `uid` != 0", $item['parent-uri']]);
2168                         while ($parent = self::fetch($parents)) {
2169                                 $users[$parent['uid']] = $parent['uid'];
2170                                 if ($parent['origin'] && !$origin) {
2171                                         $origin_uid = $parent['uid'];
2172                                 }
2173                         }
2174                 }
2175
2176                 foreach ($users as $uid) {
2177                         if ($origin_uid == $uid) {
2178                                 $item['diaspora_signed_text'] = $signed_text;
2179                         }
2180                         self::storeForUser($itemid, $item, $uid);
2181                 }
2182         }
2183
2184         /**
2185          * @brief Store public items for the receivers
2186          *
2187          * @param integer $itemid Item ID that should be added
2188          * @param array   $item   The item entry that will be stored
2189          * @param integer $uid    The user that will receive the item entry
2190          * @throws \Exception
2191          */
2192         private static function storeForUser($itemid, $item, $uid)
2193         {
2194                 $item['uid'] = $uid;
2195                 $item['origin'] = 0;
2196                 $item['wall'] = 0;
2197                 if ($item['uri'] == $item['parent-uri']) {
2198                         $item['contact-id'] = Contact::getIdForURL($item['owner-link'], $uid);
2199                 } else {
2200                         $item['contact-id'] = Contact::getIdForURL($item['author-link'], $uid);
2201                 }
2202
2203                 if (empty($item['contact-id'])) {
2204                         $self = DBA::selectFirst('contact', ['id'], ['self' => true, 'uid' => $uid]);
2205                         if (!DBA::isResult($self)) {
2206                                 return;
2207                         }
2208                         $item['contact-id'] = $self['id'];
2209                 }
2210
2211                 /// @todo Handling of "event-id"
2212
2213                 $notify = false;
2214                 if ($item['uri'] == $item['parent-uri']) {
2215                         $contact = DBA::selectFirst('contact', [], ['id' => $item['contact-id'], 'self' => false]);
2216                         if (DBA::isResult($contact)) {
2217                                 $notify = self::isRemoteSelf($contact, $item);
2218                         }
2219                 }
2220
2221                 $distributed = self::insert($item, false, $notify, true);
2222
2223                 if (!$distributed) {
2224                         Logger::log("Distributed public item " . $itemid . " for user " . $uid . " wasn't stored", Logger::DEBUG);
2225                 } else {
2226                         Logger::log("Distributed public item " . $itemid . " for user " . $uid . " with id " . $distributed, Logger::DEBUG);
2227                 }
2228         }
2229
2230         /**
2231          * @brief Add a shadow entry for a given item id that is a thread starter
2232          *
2233          * We store every public item entry additionally with the user id "0".
2234          * This is used for the community page and for the search.
2235          * It is planned that in the future we will store public item entries only once.
2236          *
2237          * @param integer $itemid Item ID that should be added
2238          * @throws \Exception
2239          */
2240         public static function addShadow($itemid)
2241         {
2242                 $fields = ['uid', 'private', 'moderated', 'visible', 'deleted', 'network', 'uri'];
2243                 $condition = ['id' => $itemid, 'parent' => [0, $itemid]];
2244                 $item = self::selectFirst($fields, $condition);
2245
2246                 if (!DBA::isResult($item)) {
2247                         return;
2248                 }
2249
2250                 // is it already a copy?
2251                 if (($itemid == 0) || ($item['uid'] == 0)) {
2252                         return;
2253                 }
2254
2255                 // Is it a visible public post?
2256                 if (!$item["visible"] || $item["deleted"] || $item["moderated"] || $item["private"]) {
2257                         return;
2258                 }
2259
2260                 // is it an entry from a connector? Only add an entry for natively connected networks
2261                 if (!in_array($item["network"], array_merge(Protocol::FEDERATED ,['']))) {
2262                         return;
2263                 }
2264
2265                 if (self::exists(['uri' => $item['uri'], 'uid' => 0])) {
2266                         return;
2267                 }
2268
2269                 $item = self::selectFirst(self::ITEM_FIELDLIST, ['id' => $itemid]);
2270
2271                 if (DBA::isResult($item)) {
2272                         // Preparing public shadow (removing user specific data)
2273                         $item['uid'] = 0;
2274                         unset($item['id']);
2275                         unset($item['parent']);
2276                         unset($item['wall']);
2277                         unset($item['mention']);
2278                         unset($item['origin']);
2279                         unset($item['starred']);
2280                         unset($item['postopts']);
2281                         unset($item['inform']);
2282                         if ($item['uri'] == $item['parent-uri']) {
2283                                 $item['contact-id'] = $item['owner-id'];
2284                         } else {
2285                                 $item['contact-id'] = $item['author-id'];
2286                         }
2287
2288                         $public_shadow = self::insert($item, false, false, true);
2289
2290                         Logger::log("Stored public shadow for thread ".$itemid." under id ".$public_shadow, Logger::DEBUG);
2291                 }
2292         }
2293
2294         /**
2295          * @brief Add a shadow entry for a given item id that is a comment
2296          *
2297          * This function does the same like the function above - but for comments
2298          *
2299          * @param integer $itemid Item ID that should be added
2300          * @throws \Exception
2301          */
2302         public static function addShadowPost($itemid)
2303         {
2304                 $item = self::selectFirst(self::ITEM_FIELDLIST, ['id' => $itemid]);
2305                 if (!DBA::isResult($item)) {
2306                         return;
2307                 }
2308
2309                 // Is it a toplevel post?
2310                 if ($item['id'] == $item['parent']) {
2311                         self::addShadow($itemid);
2312                         return;
2313                 }
2314
2315                 // Is this a shadow entry?
2316                 if ($item['uid'] == 0) {
2317                         return;
2318                 }
2319
2320                 // Is there a shadow parent?
2321                 if (!self::exists(['uri' => $item['parent-uri'], 'uid' => 0])) {
2322                         return;
2323                 }
2324
2325                 // Is there already a shadow entry?
2326                 if (self::exists(['uri' => $item['uri'], 'uid' => 0])) {
2327                         return;
2328                 }
2329
2330                 // Save "origin" and "parent" state
2331                 $origin = $item['origin'];
2332                 $parent = $item['parent'];
2333
2334                 // Preparing public shadow (removing user specific data)
2335                 $item['uid'] = 0;
2336                 unset($item['id']);
2337                 unset($item['parent']);
2338                 unset($item['wall']);
2339                 unset($item['mention']);
2340                 unset($item['origin']);
2341                 unset($item['starred']);
2342                 unset($item['postopts']);
2343                 unset($item['inform']);
2344                 $item['contact-id'] = Contact::getIdForURL($item['author-link']);
2345
2346                 $public_shadow = self::insert($item, false, false, true);
2347
2348                 Logger::log("Stored public shadow for comment ".$item['uri']." under id ".$public_shadow, Logger::DEBUG);
2349
2350                 // If this was a comment to a Diaspora post we don't get our comment back.
2351                 // This means that we have to distribute the comment by ourselves.
2352                 if ($origin && self::exists(['id' => $parent, 'network' => Protocol::DIASPORA])) {
2353                         self::distribute($public_shadow);
2354                 }
2355         }
2356
2357         /**
2358          * Adds a language specification in a "language" element of given $arr.
2359          * Expects "body" element to exist in $arr.
2360          *
2361          * @param $item
2362          * @throws \Text_LanguageDetect_Exception
2363          */
2364         private static function addLanguageToItemArray(&$item)
2365         {
2366                 $naked_body = BBCode::toPlaintext($item['body'], false);
2367
2368                 $ld = new Text_LanguageDetect();
2369                 $ld->setNameMode(2);
2370                 $languages = $ld->detect($naked_body, 3);
2371
2372                 if (is_array($languages)) {
2373                         $item['language'] = json_encode($languages);
2374                 }
2375         }
2376
2377         /**
2378          * @brief Creates an unique guid out of a given uri
2379          *
2380          * @param string $uri uri of an item entry
2381          * @param string $host hostname for the GUID prefix
2382          * @return string unique guid
2383          */
2384         public static function guidFromUri($uri, $host)
2385         {
2386                 // Our regular guid routine is using this kind of prefix as well
2387                 // We have to avoid that different routines could accidentally create the same value
2388                 $parsed = parse_url($uri);
2389
2390                 // We use a hash of the hostname as prefix for the guid
2391                 $guid_prefix = hash("crc32", $host);
2392
2393                 // Remove the scheme to make sure that "https" and "http" doesn't make a difference
2394                 unset($parsed["scheme"]);
2395
2396                 // Glue it together to be able to make a hash from it
2397                 $host_id = implode("/", $parsed);
2398
2399                 // We could use any hash algorithm since it isn't a security issue
2400                 $host_hash = hash("ripemd128", $host_id);
2401
2402                 return $guid_prefix.$host_hash;
2403         }
2404
2405         /**
2406          * generate an unique URI
2407          *
2408          * @param integer $uid  User id
2409          * @param string  $guid An existing GUID (Otherwise it will be generated)
2410          *
2411          * @return string
2412          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
2413          */
2414         public static function newURI($uid, $guid = "")
2415         {
2416                 if ($guid == "") {
2417                         $guid = System::createUUID();
2418                 }
2419
2420                 return self::getApp()->getBaseURL() . '/objects/' . $guid;
2421         }
2422
2423         /**
2424          * @brief Set "success_update" and "last-item" to the date of the last time we heard from this contact
2425          *
2426          * This can be used to filter for inactive contacts.
2427          * Only do this for public postings to avoid privacy problems, since poco data is public.
2428          * Don't set this value if it isn't from the owner (could be an author that we don't know)
2429          *
2430          * @param array $arr Contains the just posted item record
2431          * @throws \Exception
2432          */
2433         private static function updateContact($arr)
2434         {
2435                 // Unarchive the author
2436                 $contact = DBA::selectFirst('contact', [], ['id' => $arr["author-id"]]);
2437                 if (DBA::isResult($contact)) {
2438                         Contact::unmarkForArchival($contact);
2439                 }
2440
2441                 // Unarchive the contact if it's not our own contact
2442                 $contact = DBA::selectFirst('contact', [], ['id' => $arr["contact-id"], 'self' => false]);
2443                 if (DBA::isResult($contact)) {
2444                         Contact::unmarkForArchival($contact);
2445                 }
2446
2447                 $update = (!$arr['private'] && ((defaults($arr, 'author-link', '') === defaults($arr, 'owner-link', '')) || ($arr["parent-uri"] === $arr["uri"])));
2448
2449                 // Is it a forum? Then we don't care about the rules from above
2450                 if (!$update && in_array($arr["network"], [Protocol::ACTIVITYPUB, Protocol::DFRN]) && ($arr["parent-uri"] === $arr["uri"])) {
2451                         if (DBA::exists('contact', ['id' => $arr['contact-id'], 'forum' => true])) {
2452                                 $update = true;
2453                         }
2454                 }
2455
2456                 if ($update) {
2457                         DBA::update('contact', ['success_update' => $arr['received'], 'last-item' => $arr['received']],
2458                                 ['id' => $arr['contact-id']]);
2459                 }
2460                 // Now do the same for the system wide contacts with uid=0
2461                 if (!$arr['private']) {
2462                         DBA::update('contact', ['success_update' => $arr['received'], 'last-item' => $arr['received']],
2463                                 ['id' => $arr['owner-id']]);
2464
2465                         if ($arr['owner-id'] != $arr['author-id']) {
2466                                 DBA::update('contact', ['success_update' => $arr['received'], 'last-item' => $arr['received']],
2467                                         ['id' => $arr['author-id']]);
2468                         }
2469                 }
2470         }
2471
2472         public static function setHashtags(&$item)
2473         {
2474                 $tags = BBCode::getTags($item["body"]);
2475
2476                 // No hashtags?
2477                 if (!count($tags)) {
2478                         return false;
2479                 }
2480
2481                 // What happens in [code], stays in [code]!
2482                 // escape the # and the [
2483                 // hint: we will also get in trouble with #tags, when we want markdown in posts -> ### Headline 3
2484                 $item["body"] = preg_replace_callback("/\[code(.*?)\](.*?)\[\/code\]/ism",
2485                         function ($match) {
2486                                 // we truly ESCape all # and [ to prevent gettin weird tags in [code] blocks
2487                                 $find = ['#', '['];
2488                                 $replace = [chr(27).'sharp', chr(27).'leftsquarebracket'];
2489                                 return ("[code" . $match[1] . "]" . str_replace($find, $replace, $match[2]) . "[/code]");
2490                         }, $item["body"]);
2491
2492                 // This sorting is important when there are hashtags that are part of other hashtags
2493                 // Otherwise there could be problems with hashtags like #test and #test2
2494                 rsort($tags);
2495
2496                 $URLSearchString = "^\[\]";
2497
2498                 // All hashtags should point to the home server if "local_tags" is activated
2499                 if (Config::get('system', 'local_tags')) {
2500                         $item["body"] = preg_replace("/#\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",
2501                                         "#[url=".System::baseUrl()."/search?tag=$2]$2[/url]", $item["body"]);
2502
2503                         $item["tag"] = preg_replace("/#\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",
2504                                         "#[url=".System::baseUrl()."/search?tag=$2]$2[/url]", $item["tag"]);
2505                 }
2506
2507                 // mask hashtags inside of url, bookmarks and attachments to avoid urls in urls
2508                 $item["body"] = preg_replace_callback("/\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",
2509                         function ($match) {
2510                                 return ("[url=" . str_replace("#", "&num;", $match[1]) . "]" . str_replace("#", "&num;", $match[2]) . "[/url]");
2511                         }, $item["body"]);
2512
2513                 $item["body"] = preg_replace_callback("/\[bookmark\=([$URLSearchString]*)\](.*?)\[\/bookmark\]/ism",
2514                         function ($match) {
2515                                 return ("[bookmark=" . str_replace("#", "&num;", $match[1]) . "]" . str_replace("#", "&num;", $match[2]) . "[/bookmark]");
2516                         }, $item["body"]);
2517
2518                 $item["body"] = preg_replace_callback("/\[attachment (.*)\](.*?)\[\/attachment\]/ism",
2519                         function ($match) {
2520                                 return ("[attachment " . str_replace("#", "&num;", $match[1]) . "]" . $match[2] . "[/attachment]");
2521                         }, $item["body"]);
2522
2523                 // Repair recursive urls
2524                 $item["body"] = preg_replace("/&num;\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",
2525                                 "&num;$2", $item["body"]);
2526
2527                 foreach ($tags as $tag) {
2528                         if ((strpos($tag, '#') !== 0) || strpos($tag, '[url=') || $tag[1] == '#') {
2529                                 continue;
2530                         }
2531
2532                         $basetag = str_replace('_',' ',substr($tag,1));
2533                         $newtag = '#[url=' . System::baseUrl() . '/search?tag=' . $basetag . ']' . $basetag . '[/url]';
2534
2535                         $item["body"] = str_replace($tag, $newtag, $item["body"]);
2536
2537                         if (!stristr($item["tag"], "/search?tag=" . $basetag . "]" . $basetag . "[/url]")) {
2538                                 if (strlen($item["tag"])) {
2539                                         $item["tag"] = ',' . $item["tag"];
2540                                 }
2541                                 $item["tag"] = $newtag . $item["tag"];
2542                         }
2543                 }
2544
2545                 // Convert back the masked hashtags
2546                 $item["body"] = str_replace("&num;", "#", $item["body"]);
2547
2548                 // Remember! What happens in [code], stays in [code]
2549                 // roleback the # and [
2550                 $item["body"] = preg_replace_callback("/\[code(.*?)\](.*?)\[\/code\]/ism",
2551                         function ($match) {
2552                                 // we truly unESCape all sharp and leftsquarebracket
2553                                 $find = [chr(27).'sharp', chr(27).'leftsquarebracket'];
2554                                 $replace = ['#', '['];
2555                                 return ("[code" . $match[1] . "]" . str_replace($find, $replace, $match[2]) . "[/code]");
2556                         }, $item["body"]);
2557         }
2558
2559         /**
2560          * look for mention tags and setup a second delivery chain for forum/community posts if appropriate
2561          *
2562          * @param int $uid
2563          * @param int $item_id
2564          * @return boolean true if item was deleted, else false
2565          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
2566          * @throws \ImagickException
2567          */
2568         private static function tagDeliver($uid, $item_id)
2569         {
2570                 $mention = false;
2571
2572                 $user = DBA::selectFirst('user', [], ['uid' => $uid]);
2573                 if (!DBA::isResult($user)) {
2574                         return false;
2575                 }
2576
2577                 $community_page = (($user['page-flags'] == User::PAGE_FLAGS_COMMUNITY) ? true : false);
2578                 $prvgroup = (($user['page-flags'] == User::PAGE_FLAGS_PRVGROUP) ? true : false);
2579
2580                 $item = self::selectFirst(self::ITEM_FIELDLIST, ['id' => $item_id]);
2581                 if (!DBA::isResult($item)) {
2582                         return false;
2583                 }
2584
2585                 $link = Strings::normaliseLink(System::baseUrl() . '/profile/' . $user['nickname']);
2586
2587                 /*
2588                  * Diaspora uses their own hardwired link URL in @-tags
2589                  * instead of the one we supply with webfinger
2590                  */
2591                 $dlink = Strings::normaliseLink(System::baseUrl() . '/u/' . $user['nickname']);
2592
2593                 $cnt = preg_match_all('/[\@\!]\[url\=(.*?)\](.*?)\[\/url\]/ism', $item['body'], $matches, PREG_SET_ORDER);
2594                 if ($cnt) {
2595                         foreach ($matches as $mtch) {
2596                                 if (Strings::compareLink($link, $mtch[1]) || Strings::compareLink($dlink, $mtch[1])) {
2597                                         $mention = true;
2598                                         Logger::log('mention found: ' . $mtch[2]);
2599                                 }
2600                         }
2601                 }
2602
2603                 if (!$mention) {
2604                         if (($community_page || $prvgroup) &&
2605                                   !$item['wall'] && !$item['origin'] && ($item['id'] == $item['parent'])) {
2606                                 // mmh.. no mention.. community page or private group... no wall.. no origin.. top-post (not a comment)
2607                                 // delete it!
2608                                 Logger::log("no-mention top-level post to community or private group. delete.");
2609                                 DBA::delete('item', ['id' => $item_id]);
2610                                 return true;
2611                         }
2612                         return false;
2613                 }
2614
2615                 $arr = ['item' => $item, 'user' => $user];
2616
2617                 Hook::callAll('tagged', $arr);
2618
2619                 if (!$community_page && !$prvgroup) {
2620                         return false;
2621                 }
2622
2623                 /*
2624                  * tgroup delivery - setup a second delivery chain
2625                  * prevent delivery looping - only proceed
2626                  * if the message originated elsewhere and is a top-level post
2627                  */
2628                 if ($item['wall'] || $item['origin'] || ($item['id'] != $item['parent'])) {
2629                         return false;
2630                 }
2631
2632                 // now change this copy of the post to a forum head message and deliver to all the tgroup members
2633                 $self = DBA::selectFirst('contact', ['id', 'name', 'url', 'thumb'], ['uid' => $uid, 'self' => true]);
2634                 if (!DBA::isResult($self)) {
2635                         return false;
2636                 }
2637
2638                 $owner_id = Contact::getIdForURL($self['url']);
2639
2640                 // also reset all the privacy bits to the forum default permissions
2641
2642                 $private = ($user['allow_cid'] || $user['allow_gid'] || $user['deny_cid'] || $user['deny_gid']) ? 1 : 0;
2643
2644                 $psid = PermissionSet::fetchIDForPost($user);
2645
2646                 $forum_mode = ($prvgroup ? 2 : 1);
2647
2648                 $fields = ['wall' => true, 'origin' => true, 'forum_mode' => $forum_mode, 'contact-id' => $self['id'],
2649                         'owner-id' => $owner_id, 'private' => $private, 'psid' => $psid];
2650                 self::update($fields, ['id' => $item_id]);
2651
2652                 self::updateThread($item_id);
2653
2654                 Worker::add(['priority' => PRIORITY_HIGH, 'dont_fork' => true], 'Notifier', Delivery::POST, $item_id);
2655
2656                 return false;
2657         }
2658
2659         public static function isRemoteSelf($contact, &$datarray)
2660         {
2661                 $a = \get_app();
2662
2663                 if (!$contact['remote_self']) {
2664                         return false;
2665                 }
2666
2667                 // Prevent the forwarding of posts that are forwarded
2668                 if (!empty($datarray["extid"]) && ($datarray["extid"] == Protocol::DFRN)) {
2669                         Logger::log('Already forwarded', Logger::DEBUG);
2670                         return false;
2671                 }
2672
2673                 // Prevent to forward already forwarded posts
2674                 if ($datarray["app"] == $a->getHostName()) {
2675                         Logger::log('Already forwarded (second test)', Logger::DEBUG);
2676                         return false;
2677                 }
2678
2679                 // Only forward posts
2680                 if ($datarray["verb"] != ACTIVITY_POST) {
2681                         Logger::log('No post', Logger::DEBUG);
2682                         return false;
2683                 }
2684
2685                 if (($contact['network'] != Protocol::FEED) && $datarray['private']) {
2686                         Logger::log('Not public', Logger::DEBUG);
2687                         return false;
2688                 }
2689
2690                 $datarray2 = $datarray;
2691                 Logger::log('remote-self start - Contact '.$contact['url'].' - '.$contact['remote_self'].' Item '.print_r($datarray, true), Logger::DEBUG);
2692                 if ($contact['remote_self'] == 2) {
2693                         $self = DBA::selectFirst('contact', ['id', 'name', 'url', 'thumb'],
2694                                         ['uid' => $contact['uid'], 'self' => true]);
2695                         if (DBA::isResult($self)) {
2696                                 $datarray['contact-id'] = $self["id"];
2697
2698                                 $datarray['owner-name'] = $self["name"];
2699                                 $datarray['owner-link'] = $self["url"];
2700                                 $datarray['owner-avatar'] = $self["thumb"];
2701
2702                                 $datarray['author-name']   = $datarray['owner-name'];
2703                                 $datarray['author-link']   = $datarray['owner-link'];
2704                                 $datarray['author-avatar'] = $datarray['owner-avatar'];
2705
2706                                 unset($datarray['edited']);
2707
2708                                 unset($datarray['network']);
2709                                 unset($datarray['owner-id']);
2710                                 unset($datarray['author-id']);
2711                         }
2712
2713                         if ($contact['network'] != Protocol::FEED) {
2714                                 $datarray["guid"] = System::createUUID();
2715                                 unset($datarray["plink"]);
2716                                 $datarray["uri"] = self::newURI($contact['uid'], $datarray["guid"]);
2717                                 $datarray["parent-uri"] = $datarray["uri"];
2718                                 $datarray["thr-parent"] = $datarray["uri"];
2719                                 $datarray["extid"] = Protocol::DFRN;
2720                                 $urlpart = parse_url($datarray2['author-link']);
2721                                 $datarray["app"] = $urlpart["host"];
2722                         } else {
2723                                 $datarray['private'] = 0;
2724                         }
2725                 }
2726
2727                 if ($contact['network'] != Protocol::FEED) {
2728                         // Store the original post
2729                         $result = self::insert($datarray2, false, false);
2730                         Logger::log('remote-self post original item - Contact '.$contact['url'].' return '.$result.' Item '.print_r($datarray2, true), Logger::DEBUG);
2731                 } else {
2732                         $datarray["app"] = "Feed";
2733                         $result = true;
2734                 }
2735
2736                 // Trigger automatic reactions for addons
2737                 $datarray['api_source'] = true;
2738
2739                 // We have to tell the hooks who we are - this really should be improved
2740                 $_SESSION["authenticated"] = true;
2741                 $_SESSION["uid"] = $contact['uid'];
2742
2743                 return $result;
2744         }
2745
2746         /**
2747          *
2748          * @param string $s
2749          * @param int    $uid
2750          * @param array  $item
2751          * @param int    $cid
2752          * @return string
2753          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
2754          * @throws \ImagickException
2755          */
2756         public static function fixPrivatePhotos($s, $uid, $item = null, $cid = 0)
2757         {
2758                 if (Config::get('system', 'disable_embedded')) {
2759                         return $s;
2760                 }
2761
2762                 Logger::log('check for photos', Logger::DEBUG);
2763                 $site = substr(System::baseUrl(), strpos(System::baseUrl(), '://'));
2764
2765                 $orig_body = $s;
2766                 $new_body = '';
2767
2768                 $img_start = strpos($orig_body, '[img');
2769                 $img_st_close = ($img_start !== false ? strpos(substr($orig_body, $img_start), ']') : false);
2770                 $img_len = ($img_start !== false ? strpos(substr($orig_body, $img_start + $img_st_close + 1), '[/img]') : false);
2771
2772                 while (($img_st_close !== false) && ($img_len !== false)) {
2773                         $img_st_close++; // make it point to AFTER the closing bracket
2774                         $image = substr($orig_body, $img_start + $img_st_close, $img_len);
2775
2776                         Logger::log('found photo ' . $image, Logger::DEBUG);
2777
2778                         if (stristr($image, $site . '/photo/')) {
2779                                 // Only embed locally hosted photos
2780                                 $replace = false;
2781                                 $i = basename($image);
2782                                 $i = str_replace(['.jpg', '.png', '.gif'], ['', '', ''], $i);
2783                                 $x = strpos($i, '-');
2784
2785                                 if ($x) {
2786                                         $res = substr($i, $x + 1);
2787                                         $i = substr($i, 0, $x);
2788                                         $photo = Photo::getPhotoForUser($uid, $i, $res);
2789                                         if (DBA::isResult($photo)) {
2790                                                 /*
2791                                                  * Check to see if we should replace this photo link with an embedded image
2792                                                  * 1. No need to do so if the photo is public
2793                                                  * 2. If there's a contact-id provided, see if they're in the access list
2794                                                  *    for the photo. If so, embed it.
2795                                                  * 3. Otherwise, if we have an item, see if the item permissions match the photo
2796                                                  *    permissions, regardless of order but first check to see if they're an exact
2797                                                  *    match to save some processing overhead.
2798                                                  */
2799                                                 if (self::hasPermissions($photo)) {
2800                                                         if ($cid) {
2801                                                                 $recips = self::enumeratePermissions($photo);
2802                                                                 if (in_array($cid, $recips)) {
2803                                                                         $replace = true;
2804                                                                 }
2805                                                         } elseif ($item) {
2806                                                                 if (self::samePermissions($uid, $item, $photo)) {
2807                                                                         $replace = true;
2808                                                                 }
2809                                                         }
2810                                                 }
2811                                                 if ($replace) {
2812                                                         $photo_img = Photo::getImageForPhoto($photo);
2813                                                         // If a custom width and height were specified, apply before embedding
2814                                                         if (preg_match("/\[img\=([0-9]*)x([0-9]*)\]/is", substr($orig_body, $img_start, $img_st_close), $match)) {
2815                                                                 Logger::log('scaling photo', Logger::DEBUG);
2816
2817                                                                 $width = intval($match[1]);
2818                                                                 $height = intval($match[2]);
2819
2820                                                                 $photo_img->scaleDown(max($width, $height));
2821                                                         }
2822
2823                                                         $data = $photo_img->asString();
2824                                                         $type = $photo_img->getType();
2825
2826                                                         Logger::log('replacing photo', Logger::DEBUG);
2827                                                         $image = 'data:' . $type . ';base64,' . base64_encode($data);
2828                                                         Logger::log('replaced: ' . $image, Logger::DATA);
2829                                                 }
2830                                         }
2831                                 }
2832                         }
2833
2834                         $new_body = $new_body . substr($orig_body, 0, $img_start + $img_st_close) . $image . '[/img]';
2835                         $orig_body = substr($orig_body, $img_start + $img_st_close + $img_len + strlen('[/img]'));
2836                         if ($orig_body === false) {
2837                                 $orig_body = '';
2838                         }
2839
2840                         $img_start = strpos($orig_body, '[img');
2841                         $img_st_close = ($img_start !== false ? strpos(substr($orig_body, $img_start), ']') : false);
2842                         $img_len = ($img_start !== false ? strpos(substr($orig_body, $img_start + $img_st_close + 1), '[/img]') : false);
2843                 }
2844
2845                 $new_body = $new_body . $orig_body;
2846
2847                 return $new_body;
2848         }
2849
2850         private static function hasPermissions($obj)
2851         {
2852                 return !empty($obj['allow_cid']) || !empty($obj['allow_gid']) ||
2853                         !empty($obj['deny_cid']) || !empty($obj['deny_gid']);
2854         }
2855
2856         private static function samePermissions($uid, $obj1, $obj2)
2857         {
2858                 // first part is easy. Check that these are exactly the same.
2859                 if (($obj1['allow_cid'] == $obj2['allow_cid'])
2860                         && ($obj1['allow_gid'] == $obj2['allow_gid'])
2861                         && ($obj1['deny_cid'] == $obj2['deny_cid'])
2862                         && ($obj1['deny_gid'] == $obj2['deny_gid'])) {
2863                         return true;
2864                 }
2865
2866                 // This is harder. Parse all the permissions and compare the resulting set.
2867                 $recipients1 = self::enumeratePermissions($obj1);
2868                 $recipients2 = self::enumeratePermissions($obj2);
2869                 sort($recipients1);
2870                 sort($recipients2);
2871
2872                 /// @TODO Comparison of arrays, maybe use array_diff_assoc() here?
2873                 return ($recipients1 == $recipients2);
2874         }
2875
2876         // returns an array of contact-ids that are allowed to see this object
2877         public static function enumeratePermissions(array $obj)
2878         {
2879                 $allow_people = expand_acl($obj['allow_cid']);
2880                 $allow_groups = Group::expand($obj['uid'], expand_acl($obj['allow_gid']));
2881                 $deny_people  = expand_acl($obj['deny_cid']);
2882                 $deny_groups  = Group::expand($obj['uid'], expand_acl($obj['deny_gid']));
2883                 $recipients   = array_unique(array_merge($allow_people, $allow_groups));
2884                 $deny         = array_unique(array_merge($deny_people, $deny_groups));
2885                 $recipients   = array_diff($recipients, $deny);
2886                 return $recipients;
2887         }
2888
2889         public static function getFeedTags($item)
2890         {
2891                 $ret = [];
2892                 $matches = false;
2893                 $cnt = preg_match_all('|\#\[url\=(.*?)\](.*?)\[\/url\]|', $item['tag'], $matches);
2894                 if ($cnt) {
2895                         for ($x = 0; $x < $cnt; $x ++) {
2896                                 if ($matches[1][$x]) {
2897                                         $ret[$matches[2][$x]] = ['#', $matches[1][$x], $matches[2][$x]];
2898                                 }
2899                         }
2900                 }
2901                 $matches = false;
2902                 $cnt = preg_match_all('|\@\[url\=(.*?)\](.*?)\[\/url\]|', $item['tag'], $matches);
2903                 if ($cnt) {
2904                         for ($x = 0; $x < $cnt; $x ++) {
2905                                 if ($matches[1][$x]) {
2906                                         $ret[] = ['@', $matches[1][$x], $matches[2][$x]];
2907                                 }
2908                         }
2909                 }
2910                 return $ret;
2911         }
2912
2913         public static function expire($uid, $days, $network = "", $force = false)
2914         {
2915                 if (!$uid || ($days < 1)) {
2916                         return;
2917                 }
2918
2919                 $condition = ["`uid` = ? AND NOT `deleted` AND `id` = `parent` AND `gravity` = ?",
2920                         $uid, GRAVITY_PARENT];
2921
2922                 /*
2923                  * $expire_network_only = save your own wall posts
2924                  * and just expire conversations started by others
2925                  */
2926                 $expire_network_only = PConfig::get($uid, 'expire', 'network_only', false);
2927
2928                 if ($expire_network_only) {
2929                         $condition[0] .= " AND NOT `wall`";
2930                 }
2931
2932                 if ($network != "") {
2933                         $condition[0] .= " AND `network` = ?";
2934                         $condition[] = $network;
2935                 }
2936
2937                 $condition[0] .= " AND `received` < UTC_TIMESTAMP() - INTERVAL ? DAY";
2938                 $condition[] = $days;
2939
2940                 $items = self::select(['file', 'resource-id', 'starred', 'type', 'id', 'post-type'], $condition);
2941
2942                 if (!DBA::isResult($items)) {
2943                         return;
2944                 }
2945
2946                 $expire_items = PConfig::get($uid, 'expire', 'items', true);
2947
2948                 // Forcing expiring of items - but not notes and marked items
2949                 if ($force) {
2950                         $expire_items = true;
2951                 }
2952
2953                 $expire_notes = PConfig::get($uid, 'expire', 'notes', true);
2954                 $expire_starred = PConfig::get($uid, 'expire', 'starred', true);
2955                 $expire_photos = PConfig::get($uid, 'expire', 'photos', false);
2956
2957                 $expired = 0;
2958
2959                 while ($item = Item::fetch($items)) {
2960                         // don't expire filed items
2961
2962                         if (strpos($item['file'], '[') !== false) {
2963                                 continue;
2964                         }
2965
2966                         // Only expire posts, not photos and photo comments
2967
2968                         if (!$expire_photos && strlen($item['resource-id'])) {
2969                                 continue;
2970                         } elseif (!$expire_starred && intval($item['starred'])) {
2971                                 continue;
2972                         } elseif (!$expire_notes && (($item['type'] == 'note') || ($item['post-type'] == Item::PT_PERSONAL_NOTE))) {
2973                                 continue;
2974                         } elseif (!$expire_items && ($item['type'] != 'note') && ($item['post-type'] != Item::PT_PERSONAL_NOTE)) {
2975                                 continue;
2976                         }
2977
2978                         self::deleteById($item['id'], PRIORITY_LOW);
2979
2980                         ++$expired;
2981                 }
2982                 DBA::close($items);
2983                 Logger::log('User ' . $uid . ": expired $expired items; expire items: $expire_items, expire notes: $expire_notes, expire starred: $expire_starred, expire photos: $expire_photos");
2984         }
2985
2986         public static function firstPostDate($uid, $wall = false)
2987         {
2988                 $condition = ['uid' => $uid, 'wall' => $wall, 'deleted' => false, 'visible' => true, 'moderated' => false];
2989                 $params = ['order' => ['received' => false]];
2990                 $thread = DBA::selectFirst('thread', ['received'], $condition, $params);
2991                 if (DBA::isResult($thread)) {
2992                         return substr(DateTimeFormat::local($thread['received']), 0, 10);
2993                 }
2994                 return false;
2995         }
2996
2997         /**
2998          * @brief add/remove activity to an item
2999          *
3000          * Toggle activities as like,dislike,attend of an item
3001          *
3002          * @param string $item_id
3003          * @param string $verb
3004          *            Activity verb. One of
3005          *            like, unlike, dislike, undislike, attendyes, unattendyes,
3006          *            attendno, unattendno, attendmaybe, unattendmaybe
3007          * @return bool
3008          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
3009          * @throws \ImagickException
3010          * @hook  'post_local_end'
3011          *            array $arr
3012          *            'post_id' => ID of posted item
3013          */
3014         public static function performLike($item_id, $verb)
3015         {
3016                 if (!local_user() && !remote_user()) {
3017                         return false;
3018                 }
3019
3020                 switch ($verb) {
3021                         case 'like':
3022                         case 'unlike':
3023                                 $activity = ACTIVITY_LIKE;
3024                                 break;
3025                         case 'dislike':
3026                         case 'undislike':
3027                                 $activity = ACTIVITY_DISLIKE;
3028                                 break;
3029                         case 'attendyes':
3030                         case 'unattendyes':
3031                                 $activity = ACTIVITY_ATTEND;
3032                                 break;
3033                         case 'attendno':
3034                         case 'unattendno':
3035                                 $activity = ACTIVITY_ATTENDNO;
3036                                 break;
3037                         case 'attendmaybe':
3038                         case 'unattendmaybe':
3039                                 $activity = ACTIVITY_ATTENDMAYBE;
3040                                 break;
3041                         default:
3042                                 Logger::log('like: unknown verb ' . $verb . ' for item ' . $item_id);
3043                                 return false;
3044                 }
3045
3046                 // Enable activity toggling instead of on/off
3047                 $event_verb_flag = $activity === ACTIVITY_ATTEND || $activity === ACTIVITY_ATTENDNO || $activity === ACTIVITY_ATTENDMAYBE;
3048
3049                 Logger::log('like: verb ' . $verb . ' item ' . $item_id);
3050
3051                 $item = self::selectFirst(self::ITEM_FIELDLIST, ['`id` = ? OR `uri` = ?', $item_id, $item_id]);
3052                 if (!DBA::isResult($item)) {
3053                         Logger::log('like: unknown item ' . $item_id);
3054                         return false;
3055                 }
3056
3057                 $item_uri = $item['uri'];
3058
3059                 $uid = $item['uid'];
3060                 if (($uid == 0) && local_user()) {
3061                         $uid = local_user();
3062                 }
3063
3064                 if (!Security::canWriteToUserWall($uid)) {
3065                         Logger::log('like: unable to write on wall ' . $uid);
3066                         return false;
3067                 }
3068
3069                 // Retrieves the local post owner
3070                 $owner_self_contact = DBA::selectFirst('contact', [], ['uid' => $uid, 'self' => true]);
3071                 if (!DBA::isResult($owner_self_contact)) {
3072                         Logger::log('like: unknown owner ' . $uid);
3073                         return false;
3074                 }
3075
3076                 // Retrieve the current logged in user's public contact
3077                 $author_id = public_contact();
3078
3079                 $author_contact = DBA::selectFirst('contact', ['url'], ['id' => $author_id]);
3080                 if (!DBA::isResult($author_contact)) {
3081                         Logger::log('like: unknown author ' . $author_id);
3082                         return false;
3083                 }
3084
3085                 // Contact-id is the uid-dependant author contact
3086                 if (local_user() == $uid) {
3087                         $item_contact_id = $owner_self_contact['id'];
3088                 } else {
3089                         $item_contact_id = Contact::getIdForURL($author_contact['url'], $uid, true);
3090                         $item_contact = DBA::selectFirst('contact', [], ['id' => $item_contact_id]);
3091                         if (!DBA::isResult($item_contact)) {
3092                                 Logger::log('like: unknown item contact ' . $item_contact_id);
3093                                 return false;
3094                         }
3095                 }
3096
3097                 // Look for an existing verb row
3098                 // event participation are essentially radio toggles. If you make a subsequent choice,
3099                 // we need to eradicate your first choice.
3100                 if ($event_verb_flag) {
3101                         $verbs = [ACTIVITY_ATTEND, ACTIVITY_ATTENDNO, ACTIVITY_ATTENDMAYBE];
3102
3103                         // Translate to the index based activity index
3104                         $activities = [];
3105                         foreach ($verbs as $verb) {
3106                                 $activities[] = self::activityToIndex($verb);
3107                         }
3108                 } else {
3109                         $activities = self::activityToIndex($activity);
3110                 }
3111
3112                 $condition = ['activity' => $activities, 'deleted' => false, 'gravity' => GRAVITY_ACTIVITY,
3113                         'author-id' => $author_id, 'uid' => $item['uid'], 'thr-parent' => $item_uri];
3114
3115                 $like_item = self::selectFirst(['id', 'guid', 'verb'], $condition);
3116
3117                 // If it exists, mark it as deleted
3118                 if (DBA::isResult($like_item)) {
3119                         self::deleteById($like_item['id']);
3120
3121                         if (!$event_verb_flag || $like_item['verb'] == $activity) {
3122                                 return true;
3123                         }
3124                 }
3125
3126                 // Verb is "un-something", just trying to delete existing entries
3127                 if (strpos($verb, 'un') === 0) {
3128                         return true;
3129                 }
3130
3131                 $objtype = $item['resource-id'] ? ACTIVITY_OBJ_IMAGE : ACTIVITY_OBJ_NOTE;
3132
3133                 $new_item = [
3134                         'guid'          => System::createUUID(),
3135                         'uri'           => self::newURI($item['uid']),
3136                         'uid'           => $item['uid'],
3137                         'contact-id'    => $item_contact_id,
3138                         'wall'          => $item['wall'],
3139                         'origin'        => 1,
3140                         'network'       => Protocol::DFRN,
3141                         'gravity'       => GRAVITY_ACTIVITY,
3142                         'parent'        => $item['id'],
3143                         'parent-uri'    => $item['uri'],
3144                         'thr-parent'    => $item['uri'],
3145                         'owner-id'      => $author_id,
3146                         'author-id'     => $author_id,
3147                         'body'          => $activity,
3148                         'verb'          => $activity,
3149                         'object-type'   => $objtype,
3150                         'allow_cid'     => $item['allow_cid'],
3151                         'allow_gid'     => $item['allow_gid'],
3152                         'deny_cid'      => $item['deny_cid'],
3153                         'deny_gid'      => $item['deny_gid'],
3154                         'visible'       => 1,
3155                         'unseen'        => 1,
3156                 ];
3157
3158                 $signed = Diaspora::createLikeSignature($uid, $new_item);
3159                 if (!empty($signed)) {
3160                         $new_item['diaspora_signed_text'] = json_encode($signed);
3161                 }
3162
3163                 $new_item_id = self::insert($new_item);
3164
3165                 // If the parent item isn't visible then set it to visible
3166                 if (!$item['visible']) {
3167                         self::update(['visible' => true], ['id' => $item['id']]);
3168                 }
3169
3170                 $new_item['id'] = $new_item_id;
3171
3172                 Hook::callAll('post_local_end', $new_item);
3173
3174                 return true;
3175         }
3176
3177         private static function addThread($itemid, $onlyshadow = false)
3178         {
3179                 $fields = ['uid', 'created', 'edited', 'commented', 'received', 'changed', 'wall', 'private', 'pubmail',
3180                         'moderated', 'visible', 'starred', 'contact-id', 'post-type',
3181                         'deleted', 'origin', 'forum_mode', 'mention', 'network', 'author-id', 'owner-id'];
3182                 $condition = ["`id` = ? AND (`parent` = ? OR `parent` = 0)", $itemid, $itemid];
3183                 $item = self::selectFirst($fields, $condition);
3184
3185                 if (!DBA::isResult($item)) {
3186                         return;
3187                 }
3188
3189                 $item['iid'] = $itemid;
3190
3191                 if (!$onlyshadow) {
3192                         $result = DBA::insert('thread', $item);
3193
3194                         Logger::log("Add thread for item ".$itemid." - ".print_r($result, true), Logger::DEBUG);
3195                 }
3196         }
3197
3198         private static function updateThread($itemid, $setmention = false)
3199         {
3200                 $fields = ['uid', 'guid', 'created', 'edited', 'commented', 'received', 'changed', 'post-type',
3201                         'wall', 'private', 'pubmail', 'moderated', 'visible', 'starred', 'contact-id',
3202                         'deleted', 'origin', 'forum_mode', 'network', 'author-id', 'owner-id'];
3203                 $condition = ["`id` = ? AND (`parent` = ? OR `parent` = 0)", $itemid, $itemid];
3204
3205                 $item = self::selectFirst($fields, $condition);
3206                 if (!DBA::isResult($item)) {
3207                         return;
3208                 }
3209
3210                 if ($setmention) {
3211                         $item["mention"] = 1;
3212                 }
3213
3214                 $fields = [];
3215
3216                 foreach ($item as $field => $data) {
3217                         if (!in_array($field, ["guid"])) {
3218                                 $fields[$field] = $data;
3219                         }
3220                 }
3221
3222                 $result = DBA::update('thread', $fields, ['iid' => $itemid]);
3223
3224                 Logger::log("Update thread for item ".$itemid." - guid ".$item["guid"]." - ".(int)$result, Logger::DEBUG);
3225         }
3226
3227         private static function deleteThread($itemid, $itemuri = "")
3228         {
3229                 $item = DBA::selectFirst('thread', ['uid'], ['iid' => $itemid]);
3230                 if (!DBA::isResult($item)) {
3231                         Logger::log('No thread found for id '.$itemid, Logger::DEBUG);
3232                         return;
3233                 }
3234
3235                 $result = DBA::delete('thread', ['iid' => $itemid], ['cascade' => false]);
3236
3237                 Logger::log("deleteThread: Deleted thread for item ".$itemid." - ".print_r($result, true), Logger::DEBUG);
3238
3239                 if ($itemuri != "") {
3240                         $condition = ["`uri` = ? AND NOT `deleted` AND NOT (`uid` IN (?, 0))", $itemuri, $item["uid"]];
3241                         if (!self::exists($condition)) {
3242                                 DBA::delete('item', ['uri' => $itemuri, 'uid' => 0]);
3243                                 Logger::log("deleteThread: Deleted shadow for item ".$itemuri, Logger::DEBUG);
3244                         }
3245                 }
3246         }
3247
3248         public static function getPermissionsSQLByUserId($owner_id, $remote_verified = false, $groups = null, $remote_cid = null)
3249         {
3250                 $local_user = local_user();
3251                 $remote_user = remote_user();
3252
3253                 /*
3254                  * Construct permissions
3255                  *
3256                  * default permissions - anonymous user
3257                  */
3258                 $sql = " AND NOT `item`.`private`";
3259
3260                 // Profile owner - everything is visible
3261                 if ($local_user && ($local_user == $owner_id)) {
3262                         $sql = '';
3263                 } elseif ($remote_user) {
3264                         /*
3265                          * Authenticated visitor. Unless pre-verified,
3266                          * check that the contact belongs to this $owner_id
3267                          * and load the groups the visitor belongs to.
3268                          * If pre-verified, the caller is expected to have already
3269                          * done this and passed the groups into this function.
3270                          */
3271                         $set = PermissionSet::get($owner_id, $remote_cid, $groups);
3272
3273                         if (!empty($set)) {
3274                                 $sql_set = " OR (`item`.`private` IN (1,2) AND `item`.`wall` AND `item`.`psid` IN (" . implode(',', $set) . "))";
3275                         } else {
3276                                 $sql_set = '';
3277                         }
3278
3279                         $sql = " AND (NOT `item`.`private`" . $sql_set . ")";
3280                 }
3281
3282                 return $sql;
3283         }
3284
3285         /**
3286          * get translated item type
3287          *
3288          * @param $item
3289          * @return string
3290          */
3291         public static function postType($item)
3292         {
3293                 if (!empty($item['event-id'])) {
3294                         return L10n::t('event');
3295                 } elseif (!empty($item['resource-id'])) {
3296                         return L10n::t('photo');
3297                 } elseif (!empty($item['verb']) && $item['verb'] !== ACTIVITY_POST) {
3298                         return L10n::t('activity');
3299                 } elseif ($item['id'] != $item['parent']) {
3300                         return L10n::t('comment');
3301                 }
3302
3303                 return L10n::t('post');
3304         }
3305
3306         /**
3307          * Sets the "rendered-html" field of the provided item
3308          *
3309          * Body is preserved to avoid side-effects as we modify it just-in-time for spoilers and private image links
3310          *
3311          * @param array $item
3312          * @param bool  $update
3313          *
3314          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
3315          * @todo Remove reference, simply return "rendered-html" and "rendered-hash"
3316          */
3317         public static function putInCache(&$item, $update = false)
3318         {
3319                 $body = $item["body"];
3320
3321                 $rendered_hash = defaults($item, 'rendered-hash', '');
3322                 $rendered_html = defaults($item, 'rendered-html', '');
3323
3324                 if ($rendered_hash == ''
3325                         || $rendered_html == ""
3326                         || $rendered_hash != hash("md5", $item["body"])
3327                         || Config::get("system", "ignore_cache")
3328                 ) {
3329                         $a = self::getApp();
3330                         redir_private_images($a, $item);
3331
3332                         $item["rendered-html"] = prepare_text($item["body"]);
3333                         $item["rendered-hash"] = hash("md5", $item["body"]);
3334
3335                         $hook_data = ['item' => $item, 'rendered-html' => $item['rendered-html'], 'rendered-hash' => $item['rendered-hash']];
3336                         Hook::callAll('put_item_in_cache', $hook_data);
3337                         $item['rendered-html'] = $hook_data['rendered-html'];
3338                         $item['rendered-hash'] = $hook_data['rendered-hash'];
3339                         unset($hook_data);
3340
3341                         // Force an update if the generated values differ from the existing ones
3342                         if ($rendered_hash != $item["rendered-hash"]) {
3343                                 $update = true;
3344                         }
3345
3346                         // Only compare the HTML when we forcefully ignore the cache
3347                         if (Config::get("system", "ignore_cache") && ($rendered_html != $item["rendered-html"])) {
3348                                 $update = true;
3349                         }
3350
3351                         if ($update && !empty($item["id"])) {
3352                                 self::update(
3353                                         [
3354                                                 'rendered-html' => $item["rendered-html"],
3355                                                 'rendered-hash' => $item["rendered-hash"]
3356                                         ],
3357                                         ['id' => $item["id"]]
3358                                 );
3359                         }
3360                 }
3361
3362                 $item["body"] = $body;
3363         }
3364
3365         /**
3366          * @brief Given an item array, convert the body element from bbcode to html and add smilie icons.
3367          * If attach is true, also add icons for item attachments.
3368          *
3369          * @param array   $item
3370          * @param boolean $attach
3371          * @param boolean $is_preview
3372          * @return string item body html
3373          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
3374          * @throws \ImagickException
3375          * @hook  prepare_body_init item array before any work
3376          * @hook  prepare_body_content_filter ('item'=>item array, 'filter_reasons'=>string array) before first bbcode to html
3377          * @hook  prepare_body ('item'=>item array, 'html'=>body string, 'is_preview'=>boolean, 'filter_reasons'=>string array) after first bbcode to html
3378          * @hook  prepare_body_final ('item'=>item array, 'html'=>body string) after attach icons and blockquote special case handling (spoiler, author)
3379          */
3380         public static function prepareBody(array &$item, $attach = false, $is_preview = false)
3381         {
3382                 $a = self::getApp();
3383                 Hook::callAll('prepare_body_init', $item);
3384
3385                 // In order to provide theme developers more possibilities, event items
3386                 // are treated differently.
3387                 if ($item['object-type'] === ACTIVITY_OBJ_EVENT && isset($item['event-id'])) {
3388                         $ev = Event::getItemHTML($item);
3389                         return $ev;
3390                 }
3391
3392                 $tags = Term::populateTagsFromItem($item);
3393
3394                 $item['tags'] = $tags['tags'];
3395                 $item['hashtags'] = $tags['hashtags'];
3396                 $item['mentions'] = $tags['mentions'];
3397
3398                 // Compile eventual content filter reasons
3399                 $filter_reasons = [];
3400                 if (!$is_preview && public_contact() != $item['author-id']) {
3401                         if (!empty($item['content-warning']) && (!local_user() || !PConfig::get(local_user(), 'system', 'disable_cw', false))) {
3402                                 $filter_reasons[] = L10n::t('Content warning: %s', $item['content-warning']);
3403                         }
3404
3405                         $hook_data = [
3406                                 'item' => $item,
3407                                 'filter_reasons' => $filter_reasons
3408                         ];
3409                         Hook::callAll('prepare_body_content_filter', $hook_data);
3410                         $filter_reasons = $hook_data['filter_reasons'];
3411                         unset($hook_data);
3412                 }
3413
3414                 // Update the cached values if there is no "zrl=..." on the links.
3415                 $update = (!local_user() && !remote_user() && ($item["uid"] == 0));
3416
3417                 // Or update it if the current viewer is the intented viewer.
3418                 if (($item["uid"] == local_user()) && ($item["uid"] != 0)) {
3419                         $update = true;
3420                 }
3421
3422                 self::putInCache($item, $update);
3423                 $s = $item["rendered-html"];
3424
3425                 $hook_data = [
3426                         'item' => $item,
3427                         'html' => $s,
3428                         'preview' => $is_preview,
3429                         'filter_reasons' => $filter_reasons
3430                 ];
3431                 Hook::callAll('prepare_body', $hook_data);
3432                 $s = $hook_data['html'];
3433                 unset($hook_data);
3434
3435                 if (!$attach) {
3436                         // Replace the blockquotes with quotes that are used in mails.
3437                         $mailquote = '<blockquote type="cite" class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">';
3438                         $s = str_replace(['<blockquote>', '<blockquote class="spoiler">', '<blockquote class="author">'], [$mailquote, $mailquote, $mailquote], $s);
3439                         return $s;
3440                 }
3441
3442                 $as = '';
3443                 $vhead = false;
3444                 $matches = [];
3445                 preg_match_all('|\[attach\]href=\"(.*?)\" length=\"(.*?)\" type=\"(.*?)\"(?: title=\"(.*?)\")?|', $item['attach'], $matches, PREG_SET_ORDER);
3446                 foreach ($matches as $mtch) {
3447                         $mime = $mtch[3];
3448
3449                         $the_url = Contact::magicLinkById($item['author-id'], $mtch[1]);
3450
3451                         if (strpos($mime, 'video') !== false) {
3452                                 if (!$vhead) {
3453                                         $vhead = true;
3454                                         $a->page['htmlhead'] .= Renderer::replaceMacros(Renderer::getMarkupTemplate('videos_head.tpl'));
3455                                 }
3456
3457                                 $url_parts = explode('/', $the_url);
3458                                 $id = end($url_parts);
3459                                 $as .= Renderer::replaceMacros(Renderer::getMarkupTemplate('video_top.tpl'), [
3460                                         '$video' => [
3461                                                 'id'     => $id,
3462                                                 'title'  => L10n::t('View Video'),
3463                                                 'src'    => $the_url,
3464                                                 'mime'   => $mime,
3465                                         ],
3466                                 ]);
3467                         }
3468
3469                         $filetype = strtolower(substr($mime, 0, strpos($mime, '/')));
3470                         if ($filetype) {
3471                                 $filesubtype = strtolower(substr($mime, strpos($mime, '/') + 1));
3472                                 $filesubtype = str_replace('.', '-', $filesubtype);
3473                         } else {
3474                                 $filetype = 'unkn';
3475                                 $filesubtype = 'unkn';
3476                         }
3477
3478                         $title = Strings::escapeHtml(trim(defaults($mtch, 4, $mtch[1])));
3479                         $title .= ' ' . $mtch[2] . ' ' . L10n::t('bytes');
3480
3481                         $icon = '<div class="attachtype icon s22 type-' . $filetype . ' subtype-' . $filesubtype . '"></div>';
3482                         $as .= '<a href="' . strip_tags($the_url) . '" title="' . $title . '" class="attachlink" target="_blank" >' . $icon . '</a>';
3483                 }
3484
3485                 if ($as != '') {
3486                         $s .= '<div class="body-attach">'.$as.'<div class="clear"></div></div>';
3487                 }
3488
3489                 // Map.
3490                 if (strpos($s, '<div class="map">') !== false && !empty($item['coord'])) {
3491                         $x = Map::byCoordinates(trim($item['coord']));
3492                         if ($x) {
3493                                 $s = preg_replace('/\<div class\=\"map\"\>/', '$0' . $x, $s);
3494                         }
3495                 }
3496
3497
3498                 // Look for spoiler.
3499                 $spoilersearch = '<blockquote class="spoiler">';
3500
3501                 // Remove line breaks before the spoiler.
3502                 while ((strpos($s, "\n" . $spoilersearch) !== false)) {
3503                         $s = str_replace("\n" . $spoilersearch, $spoilersearch, $s);
3504                 }
3505                 while ((strpos($s, "<br />" . $spoilersearch) !== false)) {
3506                         $s = str_replace("<br />" . $spoilersearch, $spoilersearch, $s);
3507                 }
3508
3509                 while ((strpos($s, $spoilersearch) !== false)) {
3510                         $pos = strpos($s, $spoilersearch);
3511                         $rnd = Strings::getRandomHex(8);
3512                         $spoilerreplace = '<br /> <span id="spoiler-wrap-' . $rnd . '" class="spoiler-wrap fakelink" onclick="openClose(\'spoiler-' . $rnd . '\');">' . L10n::t('Click to open/close') . '</span>'.
3513                                                 '<blockquote class="spoiler" id="spoiler-' . $rnd . '" style="display: none;">';
3514                         $s = substr($s, 0, $pos) . $spoilerreplace . substr($s, $pos + strlen($spoilersearch));
3515                 }
3516
3517                 // Look for quote with author.
3518                 $authorsearch = '<blockquote class="author">';
3519
3520                 while ((strpos($s, $authorsearch) !== false)) {
3521                         $pos = strpos($s, $authorsearch);
3522                         $rnd = Strings::getRandomHex(8);
3523                         $authorreplace = '<br /> <span id="author-wrap-' . $rnd . '" class="author-wrap fakelink" onclick="openClose(\'author-' . $rnd . '\');">' . L10n::t('Click to open/close') . '</span>'.
3524                                                 '<blockquote class="author" id="author-' . $rnd . '" style="display: block;">';
3525                         $s = substr($s, 0, $pos) . $authorreplace . substr($s, $pos + strlen($authorsearch));
3526                 }
3527
3528                 // Replace friendica image url size with theme preference.
3529                 if (!empty($a->theme_info['item_image_size'])) {
3530                         $ps = $a->theme_info['item_image_size'];
3531                         $s = preg_replace('|(<img[^>]+src="[^"]+/photo/[0-9a-f]+)-[0-9]|', "$1-" . $ps, $s);
3532                 }
3533
3534                 $s = HTML::applyContentFilter($s, $filter_reasons);
3535
3536                 $hook_data = ['item' => $item, 'html' => $s];
3537                 Hook::callAll('prepare_body_final', $hook_data);
3538
3539                 return $hook_data['html'];
3540         }
3541
3542         /**
3543          * get private link for item
3544          *
3545          * @param array $item
3546          * @return boolean|array False if item has not plink, otherwise array('href'=>plink url, 'title'=>translated title)
3547          * @throws \Exception
3548          */
3549         public static function getPlink($item)
3550         {
3551                 $a = self::getApp();
3552
3553                 if ($a->user['nickname'] != "") {
3554                         $ret = [
3555                                 'href' => "display/" . $item['guid'],
3556                                 'orig' => "display/" . $item['guid'],
3557                                 'title' => L10n::t('View on separate page'),
3558                                 'orig_title' => L10n::t('view on separate page'),
3559                         ];
3560
3561                         if (!empty($item['plink'])) {
3562                                 $ret["href"] = $a->removeBaseURL($item['plink']);
3563                                 $ret["title"] = L10n::t('link to source');
3564                         }
3565
3566                 } elseif (!empty($item['plink']) && ($item['private'] != 1)) {
3567                         $ret = [
3568                                 'href' => $item['plink'],
3569                                 'orig' => $item['plink'],
3570                                 'title' => L10n::t('link to source'),
3571                         ];
3572                 } else {
3573                         $ret = [];
3574                 }
3575
3576                 return $ret;
3577         }
3578
3579         /**
3580          * Is the given item array a post that is sent as starting post to a forum?
3581          *
3582          * @param array $item
3583          * @param array $owner
3584          *
3585          * @return boolean "true" when it is a forum post
3586          */
3587         public static function isForumPost(array $item, array $owner = [])
3588         {
3589                 if (empty($owner)) {
3590                         $owner = User::getOwnerDataById($item['uid']);
3591                         if (empty($owner)) {
3592                                 return false;
3593                         }
3594                 }
3595
3596                 if (($item['author-id'] == $item['owner-id']) ||
3597                         ($owner['id'] == $item['contact-id']) ||
3598                         ($item['uri'] != $item['parent-uri']) ||
3599                         $item['origin']) {
3600                         return false;
3601                 }
3602
3603                 return Contact::isForum($item['contact-id']);
3604         }
3605
3606         /**
3607          * Search item id for given URI or plink
3608          *
3609          * @param string $uri
3610          * @param integer $uid
3611          *
3612          * @return integer item id
3613          */
3614         public static function searchByLink($uri, $uid = 0)
3615         {
3616                 $ssl_uri = str_replace('http://', 'https://', $uri);
3617                 $uris = [$uri, $ssl_uri, Strings::normaliseLink($uri)];
3618
3619                 $item = DBA::selectFirst('item', ['id'], ['uri' => $uris, 'uid' => $uid]);
3620                 if (DBA::isResult($item)) {
3621                         return $item['id'];
3622                 }
3623
3624                 $itemcontent = DBA::selectFirst('item-content', ['uri-id'], ['plink' => $uris]);
3625                 if (!DBA::isResult($itemcontent)) {
3626                         return 0;
3627                 }
3628
3629                 $itemuri = DBA::selectFirst('item-uri', ['uri'], ['id' => $itemcontent['uri-id']]);
3630                 if (!DBA::isResult($itemuri)) {
3631                         return 0;
3632                 }
3633
3634                 $item = DBA::selectFirst('item', ['id'], ['uri' => $itemuri['uri'], 'uid' => $uid]);
3635                 if (DBA::isResult($item)) {
3636                         return $item['id'];
3637                 }
3638
3639                 return 0;
3640         }
3641
3642         /**
3643          * Fetches item for given URI or plink
3644          *
3645          * @param string $uri
3646          * @param integer $uid
3647          *
3648          * @return integer item id
3649          */
3650         public static function fetchByLink($uri, $uid = 0)
3651         {
3652                 $item_id = self::searchByLink($uri, $uid);
3653                 if (!empty($item_id)) {
3654                         return $item_id;
3655                 }
3656
3657                 if (ActivityPub\Processor::fetchMissingActivity($uri)) {
3658                         $item_id = self::searchByLink($uri, $uid);
3659                 } else {
3660                         $item_id = Diaspora::fetchByURL($uri);
3661                 }
3662
3663                 if (!empty($item_id)) {
3664                         return $item_id;
3665                 }
3666
3667                 return 0;
3668         }
3669 }