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 $result;
 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                 $contact_id = (int)$item["contact-id"];
1238
1239                 if (!empty($contact_id)) {
1240                         return $contact_id;
1241                 }
1242                 Logger::log('Missing contact-id. Called by: '.System::callstack(), Logger::DEBUG);
1243                 /*
1244                  * First we are looking for a suitable contact that matches with the author of the post
1245                  * This is done only for comments
1246                  */
1247                 if ($item['parent-uri'] != $item['uri']) {
1248                         $contact_id = Contact::getIdForURL($item['author-link'], $item['uid']);
1249                 }
1250
1251                 // If not present then maybe the owner was found
1252                 if ($contact_id == 0) {
1253                         $contact_id = Contact::getIdForURL($item['owner-link'], $item['uid']);
1254                 }
1255
1256                 // Still missing? Then use the "self" contact of the current user
1257                 if ($contact_id == 0) {
1258                         $self = DBA::selectFirst('contact', ['id'], ['self' => true, 'uid' => $item['uid']]);
1259                         if (DBA::isResult($self)) {
1260                                 $contact_id = $self["id"];
1261                         }
1262                 }
1263                 Logger::log("Contact-id was missing for post ".$item['guid']." from user id ".$item['uid']." - now set to ".$contact_id, Logger::DEBUG);
1264
1265                 return $contact_id;
1266         }
1267
1268         // This function will finally cover most of the preparation functionality in mod/item.php
1269         public static function prepare(&$item)
1270         {
1271                 /*
1272                  * @TODO: Unused code triggering inspection errors
1273                  *
1274                 $data = BBCode::getAttachmentData($item['body']);
1275                 if ((preg_match_all("/\[bookmark\=([^\]]*)\](.*?)\[\/bookmark\]/ism", $item['body'], $match, PREG_SET_ORDER) || isset($data["type"]))
1276                         && ($posttype != Item::PT_PERSONAL_NOTE)) {
1277                         $posttype = Item::PT_PAGE;
1278                         $objecttype = ACTIVITY_OBJ_BOOKMARK;
1279                 }
1280                  */
1281         }
1282
1283         public static function insert($item, $force_parent = false, $notify = false, $dontcache = false)
1284         {
1285                 $orig_item = $item;
1286
1287                 $priority = PRIORITY_HIGH;
1288
1289                 // If it is a posting where users should get notifications, then define it as wall posting
1290                 if ($notify) {
1291                         $item['wall'] = 1;
1292                         $item['origin'] = 1;
1293                         $item['network'] = Protocol::DFRN;
1294                         $item['protocol'] = Conversation::PARCEL_DFRN;
1295
1296                         if (is_int($notify)) {
1297                                 $priority = $notify;
1298                         }
1299                 } else {
1300                         $item['network'] = trim(defaults($item, 'network', Protocol::PHANTOM));
1301                 }
1302
1303                 $item['guid'] = self::guid($item, $notify);
1304                 $item['uri'] = Strings::escapeTags(trim(defaults($item, 'uri', self::newURI($item['uid'], $item['guid']))));
1305
1306                 // Store URI data
1307                 $item['uri-id'] = ItemURI::insert(['uri' => $item['uri'], 'guid' => $item['guid']]);
1308
1309                 // Store conversation data
1310                 $item = Conversation::insert($item);
1311
1312                 /*
1313                  * If a Diaspora signature structure was passed in, pull it out of the
1314                  * item array and set it aside for later storage.
1315                  */
1316
1317                 $dsprsig = null;
1318                 if (isset($item['dsprsig'])) {
1319                         $encoded_signature = $item['dsprsig'];
1320                         $dsprsig = json_decode(base64_decode($item['dsprsig']));
1321                         unset($item['dsprsig']);
1322                 }
1323
1324                 $diaspora_signed_text = '';
1325                 if (isset($item['diaspora_signed_text'])) {
1326                         $diaspora_signed_text = $item['diaspora_signed_text'];
1327                         unset($item['diaspora_signed_text']);
1328                 }
1329
1330                 // Converting the plink
1331                 /// @TODO Check if this is really still needed
1332                 if ($item['network'] == Protocol::OSTATUS) {
1333                         if (isset($item['plink'])) {
1334                                 $item['plink'] = OStatus::convertHref($item['plink']);
1335                         } elseif (isset($item['uri'])) {
1336                                 $item['plink'] = OStatus::convertHref($item['uri']);
1337                         }
1338                 }
1339
1340                 if (!empty($item['thr-parent'])) {
1341                         $item['parent-uri'] = $item['thr-parent'];
1342                 }
1343
1344                 if (isset($item['gravity'])) {
1345                         $item['gravity'] = intval($item['gravity']);
1346                 } elseif ($item['parent-uri'] === $item['uri']) {
1347                         $item['gravity'] = GRAVITY_PARENT;
1348                 } elseif (activity_match($item['verb'], ACTIVITY_POST)) {
1349                         $item['gravity'] = GRAVITY_COMMENT;
1350                 } elseif (activity_match($item['verb'], ACTIVITY_FOLLOW)) {
1351                         $item['gravity'] = GRAVITY_ACTIVITY;
1352                 } else {
1353                         $item['gravity'] = GRAVITY_UNKNOWN;   // Should not happen
1354                         Logger::log('Unknown gravity for verb: ' . $item['verb'], Logger::DEBUG);
1355                 }
1356
1357                 $uid = intval($item['uid']);
1358
1359                 // check for create date and expire time
1360                 $expire_interval = Config::get('system', 'dbclean-expire-days', 0);
1361
1362                 $user = DBA::selectFirst('user', ['expire'], ['uid' => $uid]);
1363                 if (DBA::isResult($user) && ($user['expire'] > 0) && (($user['expire'] < $expire_interval) || ($expire_interval == 0))) {
1364                         $expire_interval = $user['expire'];
1365                 }
1366
1367                 if (($expire_interval > 0) && !empty($item['created'])) {
1368                         $expire_date = time() - ($expire_interval * 86400);
1369                         $created_date = strtotime($item['created']);
1370                         if ($created_date < $expire_date) {
1371                                 Logger::notice('Item created before expiration interval.', [
1372                                         'created' => date('c', $created_date),
1373                                         'expired' => date('c', $expire_date),
1374                                         '$item' => $item
1375                                 ]);
1376                                 return 0;
1377                         }
1378                 }
1379
1380                 /*
1381                  * Do we already have this item?
1382                  * We have to check several networks since Friendica posts could be repeated
1383                  * via OStatus (maybe Diasporsa as well)
1384                  */
1385                 if (empty($item['network']) || in_array($item['network'], Protocol::FEDERATED)) {
1386                         $condition = ["`uri` = ? AND `uid` = ? AND `network` IN (?, ?, ?)",
1387                                 trim($item['uri']), $item['uid'],
1388                                 Protocol::DIASPORA, Protocol::DFRN, Protocol::OSTATUS];
1389                         $existing = self::selectFirst(['id', 'network'], $condition);
1390                         if (DBA::isResult($existing)) {
1391                                 // We only log the entries with a different user id than 0. Otherwise we would have too many false positives
1392                                 if ($uid != 0) {
1393                                         Logger::notice('Item already existed for user', [
1394                                                 'uri' => $item['uri'],
1395                                                 'uid' => $uid,
1396                                                 'network' => $item['network'],
1397                                                 'existing_id' => $existing["id"],
1398                                                 'existing_network' => $existing["network"]
1399                                         ]);
1400                                 }
1401
1402                                 return $existing["id"];
1403                         }
1404                 }
1405
1406                 $item['wall']          = intval(defaults($item, 'wall', 0));
1407                 $item['extid']         = trim(defaults($item, 'extid', ''));
1408                 $item['author-name']   = trim(defaults($item, 'author-name', ''));
1409                 $item['author-link']   = trim(defaults($item, 'author-link', ''));
1410                 $item['author-avatar'] = trim(defaults($item, 'author-avatar', ''));
1411                 $item['owner-name']    = trim(defaults($item, 'owner-name', ''));
1412                 $item['owner-link']    = trim(defaults($item, 'owner-link', ''));
1413                 $item['owner-avatar']  = trim(defaults($item, 'owner-avatar', ''));
1414                 $item['received']      = (isset($item['received'])  ? DateTimeFormat::utc($item['received'])  : DateTimeFormat::utcNow());
1415                 $item['created']       = (isset($item['created'])   ? DateTimeFormat::utc($item['created'])   : $item['received']);
1416                 $item['edited']        = (isset($item['edited'])    ? DateTimeFormat::utc($item['edited'])    : $item['created']);
1417                 $item['changed']       = (isset($item['changed'])   ? DateTimeFormat::utc($item['changed'])   : $item['created']);
1418                 $item['commented']     = (isset($item['commented']) ? DateTimeFormat::utc($item['commented']) : $item['created']);
1419                 $item['title']         = trim(defaults($item, 'title', ''));
1420                 $item['location']      = trim(defaults($item, 'location', ''));
1421                 $item['coord']         = trim(defaults($item, 'coord', ''));
1422                 $item['visible']       = (isset($item['visible']) ? intval($item['visible']) : 1);
1423                 $item['deleted']       = 0;
1424                 $item['parent-uri']    = trim(defaults($item, 'parent-uri', $item['uri']));
1425                 $item['post-type']     = defaults($item, 'post-type', self::PT_ARTICLE);
1426                 $item['verb']          = trim(defaults($item, 'verb', ''));
1427                 $item['object-type']   = trim(defaults($item, 'object-type', ''));
1428                 $item['object']        = trim(defaults($item, 'object', ''));
1429                 $item['target-type']   = trim(defaults($item, 'target-type', ''));
1430                 $item['target']        = trim(defaults($item, 'target', ''));
1431                 $item['plink']         = trim(defaults($item, 'plink', ''));
1432                 $item['allow_cid']     = trim(defaults($item, 'allow_cid', ''));
1433                 $item['allow_gid']     = trim(defaults($item, 'allow_gid', ''));
1434                 $item['deny_cid']      = trim(defaults($item, 'deny_cid', ''));
1435                 $item['deny_gid']      = trim(defaults($item, 'deny_gid', ''));
1436                 $item['private']       = intval(defaults($item, 'private', 0));
1437                 $item['body']          = trim(defaults($item, 'body', ''));
1438                 $item['tag']           = trim(defaults($item, 'tag', ''));
1439                 $item['attach']        = trim(defaults($item, 'attach', ''));
1440                 $item['app']           = trim(defaults($item, 'app', ''));
1441                 $item['origin']        = intval(defaults($item, 'origin', 0));
1442                 $item['postopts']      = trim(defaults($item, 'postopts', ''));
1443                 $item['resource-id']   = trim(defaults($item, 'resource-id', ''));
1444                 $item['event-id']      = intval(defaults($item, 'event-id', 0));
1445                 $item['inform']        = trim(defaults($item, 'inform', ''));
1446                 $item['file']          = trim(defaults($item, 'file', ''));
1447
1448                 // When there is no content then we don't post it
1449                 if ($item['body'].$item['title'] == '') {
1450                         Logger::notice('No body, no title.');
1451                         return 0;
1452                 }
1453
1454                 self::addLanguageToItemArray($item);
1455
1456                 // Items cannot be stored before they happen ...
1457                 if ($item['created'] > DateTimeFormat::utcNow()) {
1458                         $item['created'] = DateTimeFormat::utcNow();
1459                 }
1460
1461                 // We haven't invented time travel by now.
1462                 if ($item['edited'] > DateTimeFormat::utcNow()) {
1463                         $item['edited'] = DateTimeFormat::utcNow();
1464                 }
1465
1466                 $item['plink'] = defaults($item, 'plink', System::baseUrl() . '/display/' . urlencode($item['guid']));
1467
1468                 // The contact-id should be set before "self::insert" was called - but there seems to be issues sometimes
1469                 $item["contact-id"] = self::contactId($item);
1470
1471                 $default = ['url' => $item['author-link'], 'name' => $item['author-name'],
1472                         'photo' => $item['author-avatar'], 'network' => $item['network']];
1473
1474                 $item['author-id'] = defaults($item, 'author-id', Contact::getIdForURL($item['author-link'], 0, false, $default));
1475
1476                 if (Contact::isBlocked($item['author-id'])) {
1477                         Logger::notice('Author is blocked node-wide', ['author-link' => $item['author-link'], 'item-uri' => $item['uri']]);
1478                         return 0;
1479                 }
1480
1481                 if (!empty($item['author-link']) && Network::isUrlBlocked($item['author-link'])) {
1482                         Logger::notice('Author server is blocked', ['author-link' => $item['author-link'], 'item-uri' => $item['uri']]);
1483                         return 0;
1484                 }
1485
1486                 if (!empty($uid) && Contact::isBlockedByUser($item['author-id'], $uid)) {
1487                         Logger::notice('Author is blocked by user', ['author-link' => $item['author-link'], 'uid' => $uid, 'item-uri' => $item['uri']]);
1488                         return 0;
1489                 }
1490
1491                 $default = ['url' => $item['owner-link'], 'name' => $item['owner-name'],
1492                         'photo' => $item['owner-avatar'], 'network' => $item['network']];
1493
1494                 $item['owner-id'] = defaults($item, 'owner-id', Contact::getIdForURL($item['owner-link'], 0, false, $default));
1495
1496                 if (Contact::isBlocked($item['owner-id'])) {
1497                         Logger::notice('Owner is blocked node-wide', ['owner-link' => $item['owner-link'], 'item-uri' => $item['uri']]);
1498                         return 0;
1499                 }
1500
1501                 if (!empty($item['owner-link']) && Network::isUrlBlocked($item['owner-link'])) {
1502                         Logger::notice('Owner server is blocked', ['owner-link' => $item['owner-link'], 'item-uri' => $item['uri']]);
1503                         return 0;
1504                 }
1505
1506                 if (!empty($uid) && Contact::isBlockedByUser($item['owner-id'], $uid)) {
1507                         Logger::notice('Owner is blocked by user', ['owner-link' => $item['owner-link'], 'uid' => $uid, 'item-uri' => $item['uri']]);
1508                         return 0;
1509                 }
1510
1511                 // The causer is set during a thread completion, for example because of a reshare. It countains the responsible actor.
1512                 if (!empty($uid) && !empty($item['causer-id']) && Contact::isBlockedByUser($item['causer-id'], $uid)) {
1513                         Logger::notice('Causer is blocked by user', ['causer-link' => $item['causer-link'], 'uid' => $uid, 'item-uri' => $item['uri']]);
1514                         return 0;
1515                 }
1516
1517                 if (!empty($uid) && !empty($item['causer-id']) && ($item['parent-uri'] == $item['uri']) && Contact::isIgnoredByUser($item['causer-id'], $uid)) {
1518                         Logger::notice('Causer is ignored by user', ['causer-link' => $item['causer-link'], 'uid' => $uid, 'item-uri' => $item['uri']]);
1519                         return 0;
1520                 }
1521
1522                 // We don't store the causer, we only have it here for the checks above
1523                 unset($item['causer-id']);
1524                 unset($item['causer-link']);
1525
1526                 if ($item['network'] == Protocol::PHANTOM) {
1527                         $item['network'] = Protocol::DFRN;
1528                         Logger::notice('Missing network, setting to {network}.', [
1529                                 'uri' => $item["uri"],
1530                                 'network' => $item['network'],
1531                                 'callstack' => System::callstack()
1532                         ]);
1533                 }
1534
1535                 // Checking if there is already an item with the same guid
1536                 $condition = ['guid' => $item['guid'], 'network' => $item['network'], 'uid' => $item['uid']];
1537                 if (self::exists($condition)) {
1538                         Logger::notice('Found already existing item', [
1539                                 'guid' => $item['guid'],
1540                                 'uid' => $item['uid'],
1541                                 'network' => $item['network']
1542                         ]);
1543                         return 0;
1544                 }
1545
1546                 if ($item['verb'] == ACTIVITY_FOLLOW) {
1547                         if (!$item['origin'] && ($item['author-id'] == Contact::getPublicIdByUserId($uid))) {
1548                                 // Our own follow request can be relayed to us. We don't store it to avoid notification chaos.
1549                                 Logger::log("Follow: Don't store not origin follow request from us for " . $item['parent-uri'], Logger::DEBUG);
1550                                 return 0;
1551                         }
1552
1553                         $condition = ['verb' => ACTIVITY_FOLLOW, 'uid' => $item['uid'],
1554                                 'parent-uri' => $item['parent-uri'], 'author-id' => $item['author-id']];
1555                         if (self::exists($condition)) {
1556                                 // It happens that we receive multiple follow requests by the same author - we only store one.
1557                                 Logger::log('Follow: Found existing follow request from author ' . $item['author-id'] . ' for ' . $item['parent-uri'], Logger::DEBUG);
1558                                 return 0;
1559                         }
1560                 }
1561
1562                 // Check for hashtags in the body and repair or add hashtag links
1563                 self::setHashtags($item);
1564
1565                 $item['thr-parent'] = $item['parent-uri'];
1566
1567                 $notify_type = Delivery::POST;
1568                 $allow_cid = '';
1569                 $allow_gid = '';
1570                 $deny_cid  = '';
1571                 $deny_gid  = '';
1572
1573                 if ($item['parent-uri'] === $item['uri']) {
1574                         $parent_id = 0;
1575                         $parent_deleted = 0;
1576                         $allow_cid = $item['allow_cid'];
1577                         $allow_gid = $item['allow_gid'];
1578                         $deny_cid  = $item['deny_cid'];
1579                         $deny_gid  = $item['deny_gid'];
1580                 } else {
1581                         // find the parent and snarf the item id and ACLs
1582                         // and anything else we need to inherit
1583
1584                         $fields = ['uri', 'parent-uri', 'id', 'deleted',
1585                                 'allow_cid', 'allow_gid', 'deny_cid', 'deny_gid',
1586                                 'wall', 'private', 'forum_mode', 'origin'];
1587                         $condition = ['uri' => $item['parent-uri'], 'uid' => $item['uid']];
1588                         $params = ['order' => ['id' => false]];
1589                         $parent = self::selectFirst($fields, $condition, $params);
1590
1591                         if (DBA::isResult($parent)) {
1592                                 // is the new message multi-level threaded?
1593                                 // even though we don't support it now, preserve the info
1594                                 // and re-attach to the conversation parent.
1595
1596                                 if ($parent['uri'] != $parent['parent-uri']) {
1597                                         $item['parent-uri'] = $parent['parent-uri'];
1598
1599                                         $condition = ['uri' => $item['parent-uri'],
1600                                                 'parent-uri' => $item['parent-uri'],
1601                                                 'uid' => $item['uid']];
1602                                         $params = ['order' => ['id' => false]];
1603                                         $toplevel_parent = self::selectFirst($fields, $condition, $params);
1604
1605                                         if (DBA::isResult($toplevel_parent)) {
1606                                                 $parent = $toplevel_parent;
1607                                         }
1608                                 }
1609
1610                                 $parent_id      = $parent['id'];
1611                                 $parent_deleted = $parent['deleted'];
1612                                 $allow_cid      = $parent['allow_cid'];
1613                                 $allow_gid      = $parent['allow_gid'];
1614                                 $deny_cid       = $parent['deny_cid'];
1615                                 $deny_gid       = $parent['deny_gid'];
1616                                 $item['wall']   = $parent['wall'];
1617
1618                                 /*
1619                                  * If the parent is private, force privacy for the entire conversation
1620                                  * This differs from the above settings as it subtly allows comments from
1621                                  * email correspondents to be private even if the overall thread is not.
1622                                  */
1623                                 if ($parent['private']) {
1624                                         $item['private'] = $parent['private'];
1625                                 }
1626
1627                                 /*
1628                                  * Edge case. We host a public forum that was originally posted to privately.
1629                                  * The original author commented, but as this is a comment, the permissions
1630                                  * weren't fixed up so it will still show the comment as private unless we fix it here.
1631                                  */
1632                                 if ((intval($parent['forum_mode']) == 1) && $parent['private']) {
1633                                         $item['private'] = 0;
1634                                 }
1635
1636                                 // If its a post that originated here then tag the thread as "mention"
1637                                 if ($item['origin'] && $item['uid']) {
1638                                         DBA::update('thread', ['mention' => true], ['iid' => $parent_id]);
1639                                         Logger::log('tagged thread ' . $parent_id . ' as mention for user ' . $item['uid'], Logger::DEBUG);
1640                                 }
1641                         } else {
1642                                 /*
1643                                  * Allow one to see reply tweets from status.net even when
1644                                  * we don't have or can't see the original post.
1645                                  */
1646                                 if ($force_parent) {
1647                                         Logger::log('$force_parent=true, reply converted to top-level post.');
1648                                         $parent_id = 0;
1649                                         $item['parent-uri'] = $item['uri'];
1650                                         $item['gravity'] = GRAVITY_PARENT;
1651                                 } else {
1652                                         Logger::log('item parent '.$item['parent-uri'].' for '.$item['uid'].' was not found - ignoring item');
1653                                         return 0;
1654                                 }
1655
1656                                 $parent_deleted = 0;
1657                         }
1658                 }
1659
1660                 if (stristr($item['verb'], ACTIVITY_POKE)) {
1661                         $notify_type = Delivery::POKE;
1662                 }
1663
1664                 $item['parent-uri-id'] = ItemURI::getIdByURI($item['parent-uri']);
1665                 $item['thr-parent-id'] = ItemURI::getIdByURI($item['thr-parent']);
1666
1667                 $condition = ["`uri` = ? AND `network` IN (?, ?) AND `uid` = ?",
1668                         $item['uri'], $item['network'], Protocol::DFRN, $item['uid']];
1669                 if (self::exists($condition)) {
1670                         Logger::log('duplicated item with the same uri found. '.print_r($item,true));
1671                         return 0;
1672                 }
1673
1674                 // On Friendica and Diaspora the GUID is unique
1675                 if (in_array($item['network'], [Protocol::DFRN, Protocol::DIASPORA])) {
1676                         $condition = ['guid' => $item['guid'], 'uid' => $item['uid']];
1677                         if (self::exists($condition)) {
1678                                 Logger::log('duplicated item with the same guid found. '.print_r($item,true));
1679                                 return 0;
1680                         }
1681                 } elseif ($item['network'] == Protocol::OSTATUS) {
1682                         // Check for an existing post with the same content. There seems to be a problem with OStatus.
1683                         $condition = ["`body` = ? AND `network` = ? AND `created` = ? AND `contact-id` = ? AND `uid` = ?",
1684                                         $item['body'], $item['network'], $item['created'], $item['contact-id'], $item['uid']];
1685                         if (self::exists($condition)) {
1686                                 Logger::log('duplicated item with the same body found. '.print_r($item,true));
1687                                 return 0;
1688                         }
1689                 }
1690
1691                 // Is this item available in the global items (with uid=0)?
1692                 if ($item["uid"] == 0) {
1693                         $item["global"] = true;
1694
1695                         // Set the global flag on all items if this was a global item entry
1696                         DBA::update('item', ['global' => true], ['uri' => $item["uri"]]);
1697                 } else {
1698                         $item["global"] = self::exists(['uid' => 0, 'uri' => $item["uri"]]);
1699                 }
1700
1701                 // ACL settings
1702                 if (strlen($allow_cid) || strlen($allow_gid) || strlen($deny_cid) || strlen($deny_gid)) {
1703                         $private = 1;
1704                 } else {
1705                         $private = $item['private'];
1706                 }
1707
1708                 $item["allow_cid"] = $allow_cid;
1709                 $item["allow_gid"] = $allow_gid;
1710                 $item["deny_cid"] = $deny_cid;
1711                 $item["deny_gid"] = $deny_gid;
1712                 $item["private"] = $private;
1713                 $item["deleted"] = $parent_deleted;
1714
1715                 // Fill the cache field
1716                 self::putInCache($item);
1717
1718                 if ($notify) {
1719                         $item['edit'] = false;
1720                         $item['parent'] = $parent_id;
1721                         Hook::callAll('post_local', $item);
1722                         unset($item['edit']);
1723                         unset($item['parent']);
1724                 } else {
1725                         Hook::callAll('post_remote', $item);
1726                 }
1727
1728                 // This array field is used to trigger some automatic reactions
1729                 // It is mainly used in the "post_local" hook.
1730                 unset($item['api_source']);
1731
1732                 if (!empty($item['cancel'])) {
1733                         Logger::log('post cancelled by addon.');
1734                         return 0;
1735                 }
1736
1737                 /*
1738                  * Check for already added items.
1739                  * There is a timing issue here that sometimes creates double postings.
1740                  * An unique index would help - but the limitations of MySQL (maximum size of index values) prevent this.
1741                  */
1742                 if ($item["uid"] == 0) {
1743                         if (self::exists(['uri' => trim($item['uri']), 'uid' => 0])) {
1744                                 Logger::log('Global item already stored. URI: '.$item['uri'].' on network '.$item['network'], Logger::DEBUG);
1745                                 return 0;
1746                         }
1747                 }
1748
1749                 Logger::log('' . print_r($item,true), Logger::DATA);
1750
1751                 if (array_key_exists('tag', $item)) {
1752                         $tags = $item['tag'];
1753                         unset($item['tag']);
1754                 } else {
1755                         $tags = '';
1756                 }
1757
1758                 if (array_key_exists('file', $item)) {
1759                         $files = $item['file'];
1760                         unset($item['file']);
1761                 } else {
1762                         $files = '';
1763                 }
1764
1765                 // Creates or assigns the permission set
1766                 $item['psid'] = PermissionSet::fetchIDForPost($item);
1767
1768                 // We are doing this outside of the transaction to avoid timing problems
1769                 if (!self::insertActivity($item)) {
1770                         self::insertContent($item);
1771                 }
1772
1773                 $delivery_data = ItemDeliveryData::extractFields($item);
1774
1775                 unset($item['postopts']);
1776                 unset($item['inform']);
1777
1778                 // These fields aren't stored anymore in the item table, they are fetched upon request
1779                 unset($item['author-link']);
1780                 unset($item['author-name']);
1781                 unset($item['author-avatar']);
1782                 unset($item['author-network']);
1783
1784                 unset($item['owner-link']);
1785                 unset($item['owner-name']);
1786                 unset($item['owner-avatar']);
1787
1788                 DBA::transaction();
1789                 $ret = DBA::insert('item', $item);
1790
1791                 // When the item was successfully stored we fetch the ID of the item.
1792                 if (DBA::isResult($ret)) {
1793                         $current_post = DBA::lastInsertId();
1794                 } else {
1795                         // This can happen - for example - if there are locking timeouts.
1796                         DBA::rollback();
1797
1798                         // Store the data into a spool file so that we can try again later.
1799
1800                         // At first we restore the Diaspora signature that we removed above.
1801                         if (isset($encoded_signature)) {
1802                                 $item['dsprsig'] = $encoded_signature;
1803                         }
1804
1805                         // Now we store the data in the spool directory
1806                         // We use "microtime" to keep the arrival order and "mt_rand" to avoid duplicates
1807                         $file = 'item-'.round(microtime(true) * 10000).'-'.mt_rand().'.msg';
1808
1809                         $spoolpath = get_spoolpath();
1810                         if ($spoolpath != "") {
1811                                 $spool = $spoolpath.'/'.$file;
1812
1813                                 file_put_contents($spool, json_encode($orig_item));
1814                                 Logger::log("Item wasn't stored - Item was spooled into file ".$file, Logger::DEBUG);
1815                         }
1816                         return 0;
1817                 }
1818
1819                 if ($current_post == 0) {
1820                         // This is one of these error messages that never should occur.
1821                         Logger::log("couldn't find created item - we better quit now.");
1822                         DBA::rollback();
1823                         return 0;
1824                 }
1825
1826                 // How much entries have we created?
1827                 // We wouldn't need this query when we could use an unique index - but MySQL has length problems with them.
1828                 $entries = DBA::count('item', ['uri' => $item['uri'], 'uid' => $item['uid'], 'network' => $item['network']]);
1829
1830                 if ($entries > 1) {
1831                         // There are duplicates. We delete our just created entry.
1832                         Logger::log('Duplicated post occurred. uri = ' . $item['uri'] . ' uid = ' . $item['uid']);
1833
1834                         // Yes, we could do a rollback here - but we are having many users with MyISAM.
1835                         DBA::delete('item', ['id' => $current_post]);
1836                         DBA::commit();
1837                         return 0;
1838                 } elseif ($entries == 0) {
1839                         // This really should never happen since we quit earlier if there were problems.
1840                         Logger::log("Something is terribly wrong. We haven't found our created entry.");
1841                         DBA::rollback();
1842                         return 0;
1843                 }
1844
1845                 Logger::log('created item '.$current_post);
1846                 self::updateContact($item);
1847
1848                 if (!$parent_id || ($item['parent-uri'] === $item['uri'])) {
1849                         $parent_id = $current_post;
1850                 }
1851
1852                 // Set parent id
1853                 DBA::update('item', ['parent' => $parent_id], ['id' => $current_post]);
1854
1855                 $item['id'] = $current_post;
1856                 $item['parent'] = $parent_id;
1857
1858                 // update the commented timestamp on the parent
1859                 // Only update "commented" if it is really a comment
1860                 if (($item['gravity'] != GRAVITY_ACTIVITY) || !Config::get("system", "like_no_comment")) {
1861                         DBA::update('item', ['commented' => DateTimeFormat::utcNow(), 'changed' => DateTimeFormat::utcNow()], ['id' => $parent_id]);
1862                 } else {
1863                         DBA::update('item', ['changed' => DateTimeFormat::utcNow()], ['id' => $parent_id]);
1864                 }
1865
1866                 if ($dsprsig) {
1867                         /*
1868                          * Friendica servers lower than 3.4.3-2 had double encoded the signature ...
1869                          * We can check for this condition when we decode and encode the stuff again.
1870                          */
1871                         if (base64_encode(base64_decode(base64_decode($dsprsig->signature))) == base64_decode($dsprsig->signature)) {
1872                                 $dsprsig->signature = base64_decode($dsprsig->signature);
1873                                 Logger::log("Repaired double encoded signature from handle ".$dsprsig->signer, Logger::DEBUG);
1874                         }
1875
1876                         if (!empty($dsprsig->signed_text) && empty($dsprsig->signature) && empty($dsprsig->signer)) {
1877                                 DBA::insert('diaspora-interaction', ['uri-id' => $item['uri-id'], 'interaction' => $dsprsig->signed_text], true);
1878                         } else {
1879                                 // The other fields are used by very old Friendica servers, so we currently store them differently
1880                                 DBA::insert('sign', ['iid' => $current_post, 'signed_text' => $dsprsig->signed_text,
1881                                         'signature' => $dsprsig->signature, 'signer' => $dsprsig->signer]);
1882                         }
1883                 }
1884
1885                 if (!empty($diaspora_signed_text)) {
1886                         DBA::insert('diaspora-interaction', ['uri-id' => $item['uri-id'], 'interaction' => $diaspora_signed_text], true);
1887                 }
1888
1889                 self::tagDeliver($item['uid'], $current_post);
1890
1891                 /*
1892                  * current post can be deleted if is for a community page and no mention are
1893                  * in it.
1894                  */
1895                 if (!$dontcache) {
1896                         $posted_item = self::selectFirst(self::ITEM_FIELDLIST, ['id' => $current_post]);
1897                         if (DBA::isResult($posted_item)) {
1898                                 if ($notify) {
1899                                         Hook::callAll('post_local_end', $posted_item);
1900                                 } else {
1901                                         Hook::callAll('post_remote_end', $posted_item);
1902                                 }
1903                         } else {
1904                                 Logger::log('new item not found in DB, id ' . $current_post);
1905                         }
1906                 }
1907
1908                 if ($item['parent-uri'] === $item['uri']) {
1909                         self::addThread($current_post);
1910                 } else {
1911                         self::updateThread($parent_id);
1912                 }
1913
1914                 if (!empty($item['origin']) || !empty($item['wall']) || !empty($delivery_data['postopts']) || !empty($delivery_data['inform'])) {
1915                         ItemDeliveryData::insert($current_post, $delivery_data);
1916                 }
1917
1918                 DBA::commit();
1919
1920                 /*
1921                  * Due to deadlock issues with the "term" table we are doing these steps after the commit.
1922                  * This is not perfect - but a workable solution until we found the reason for the problem.
1923                  */
1924                 if (!empty($tags)) {
1925                         Term::insertFromTagFieldByItemId($current_post, $tags);
1926                 }
1927
1928                 if (!empty($files)) {
1929                         Term::insertFromFileFieldByItemId($current_post, $files);
1930                 }
1931
1932                 if ($item['parent-uri'] === $item['uri']) {
1933                         self::addShadow($current_post);
1934                 } else {
1935                         self::addShadowPost($current_post);
1936                 }
1937
1938                 check_user_notification($current_post);
1939
1940                 if ($notify || ($item['visible'] && ((!empty($parent) && $parent['origin']) || $item['origin']))) {
1941                         Worker::add(['priority' => $priority, 'dont_fork' => true], 'Notifier', $notify_type, $current_post);
1942                 }
1943
1944                 return $current_post;
1945         }
1946
1947         /**
1948          * @brief Insert a new item content entry
1949          *
1950          * @param array $item The item fields that are to be inserted
1951          * @return bool
1952          * @throws \Exception
1953          */
1954         private static function insertActivity(&$item)
1955         {
1956                 $activity_index = self::activityToIndex($item['verb']);
1957
1958                 if ($activity_index < 0) {
1959                         return false;
1960                 }
1961
1962                 $fields = ['activity' => $activity_index, 'uri-hash' => (string)$item['uri-id'], 'uri-id' => $item['uri-id']];
1963
1964                 // We just remove everything that is content
1965                 foreach (array_merge(self::CONTENT_FIELDLIST, self::MIXED_CONTENT_FIELDLIST) as $field) {
1966                         unset($item[$field]);
1967                 }
1968
1969                 // To avoid timing problems, we are using locks.
1970                 $locked = Lock::acquire('item_insert_activity');
1971                 if (!$locked) {
1972                         Logger::log("Couldn't acquire lock for URI " . $item['uri'] . " - proceeding anyway.");
1973                 }
1974
1975                 // Do we already have this content?
1976                 $item_activity = DBA::selectFirst('item-activity', ['id'], ['uri-id' => $item['uri-id']]);
1977                 if (DBA::isResult($item_activity)) {
1978                         $item['iaid'] = $item_activity['id'];
1979                         Logger::log('Fetched activity for URI ' . $item['uri'] . ' (' . $item['iaid'] . ')');
1980                 } elseif (DBA::insert('item-activity', $fields)) {
1981                         $item['iaid'] = DBA::lastInsertId();
1982                         Logger::log('Inserted activity for URI ' . $item['uri'] . ' (' . $item['iaid'] . ')');
1983                 } else {
1984                         // This shouldn't happen.
1985                         Logger::log('Could not insert activity for URI ' . $item['uri'] . ' - should not happen');
1986                         Lock::release('item_insert_activity');
1987                         return false;
1988                 }
1989                 if ($locked) {
1990                         Lock::release('item_insert_activity');
1991                 }
1992                 return true;
1993         }
1994
1995         /**
1996          * @brief Insert a new item content entry
1997          *
1998          * @param array $item The item fields that are to be inserted
1999          * @throws \Exception
2000          */
2001         private static function insertContent(&$item)
2002         {
2003                 $fields = ['uri-plink-hash' => (string)$item['uri-id'], 'uri-id' => $item['uri-id']];
2004
2005                 foreach (array_merge(self::CONTENT_FIELDLIST, self::MIXED_CONTENT_FIELDLIST) as $field) {
2006                         if (isset($item[$field])) {
2007                                 $fields[$field] = $item[$field];
2008                                 unset($item[$field]);
2009                         }
2010                 }
2011
2012                 // To avoid timing problems, we are using locks.
2013                 $locked = Lock::acquire('item_insert_content');
2014                 if (!$locked) {
2015                         Logger::log("Couldn't acquire lock for URI " . $item['uri'] . " - proceeding anyway.");
2016                 }
2017
2018                 // Do we already have this content?
2019                 $item_content = DBA::selectFirst('item-content', ['id'], ['uri-id' => $item['uri-id']]);
2020                 if (DBA::isResult($item_content)) {
2021                         $item['icid'] = $item_content['id'];
2022                         Logger::log('Fetched content for URI ' . $item['uri'] . ' (' . $item['icid'] . ')');
2023                 } elseif (DBA::insert('item-content', $fields)) {
2024                         $item['icid'] = DBA::lastInsertId();
2025                         Logger::log('Inserted content for URI ' . $item['uri'] . ' (' . $item['icid'] . ')');
2026                 } else {
2027                         // This shouldn't happen.
2028                         Logger::log('Could not insert content for URI ' . $item['uri'] . ' - should not happen');
2029                 }
2030                 if ($locked) {
2031                         Lock::release('item_insert_content');
2032                 }
2033         }
2034
2035         /**
2036          * @brief Update existing item content entries
2037          *
2038          * @param array $item      The item fields that are to be changed
2039          * @param array $condition The condition for finding the item content entries
2040          * @return bool
2041          * @throws \Exception
2042          */
2043         private static function updateActivity($item, $condition)
2044         {
2045                 if (empty($item['verb'])) {
2046                         return false;
2047                 }
2048                 $activity_index = self::activityToIndex($item['verb']);
2049
2050                 if ($activity_index < 0) {
2051                         return false;
2052                 }
2053
2054                 $fields = ['activity' => $activity_index];
2055
2056                 Logger::log('Update activity for ' . json_encode($condition));
2057
2058                 DBA::update('item-activity', $fields, $condition, true);
2059
2060                 return true;
2061         }
2062
2063         /**
2064          * @brief Update existing item content entries
2065          *
2066          * @param array $item      The item fields that are to be changed
2067          * @param array $condition The condition for finding the item content entries
2068          * @throws \Exception
2069          */
2070         private static function updateContent($item, $condition)
2071         {
2072                 // We have to select only the fields from the "item-content" table
2073                 $fields = [];
2074                 foreach (array_merge(self::CONTENT_FIELDLIST, self::MIXED_CONTENT_FIELDLIST) as $field) {
2075                         if (isset($item[$field])) {
2076                                 $fields[$field] = $item[$field];
2077                         }
2078                 }
2079
2080                 if (empty($fields)) {
2081                         // when there are no fields at all, just use the condition
2082                         // This is to ensure that we always store content.
2083                         $fields = $condition;
2084                 }
2085
2086                 Logger::log('Update content for ' . json_encode($condition));
2087
2088                 DBA::update('item-content', $fields, $condition, true);
2089         }
2090
2091         /**
2092          * @brief Distributes public items to the receivers
2093          *
2094          * @param integer $itemid      Item ID that should be added
2095          * @param string  $signed_text Original text (for Diaspora signatures), JSON encoded.
2096          * @throws \Exception
2097          */
2098         public static function distribute($itemid, $signed_text = '')
2099         {
2100                 $condition = ["`id` IN (SELECT `parent` FROM `item` WHERE `id` = ?)", $itemid];
2101                 $parent = self::selectFirst(['owner-id'], $condition);
2102                 if (!DBA::isResult($parent)) {
2103                         return;
2104                 }
2105
2106                 // Only distribute public items from native networks
2107                 $condition = ['id' => $itemid, 'uid' => 0,
2108                         'network' => array_merge(Protocol::FEDERATED ,['']),
2109                         'visible' => true, 'deleted' => false, 'moderated' => false, 'private' => false];
2110                 $item = self::selectFirst(self::ITEM_FIELDLIST, $condition);
2111                 if (!DBA::isResult($item)) {
2112                         return;
2113                 }
2114
2115                 $origin = $item['origin'];
2116
2117                 unset($item['id']);
2118                 unset($item['parent']);
2119                 unset($item['mention']);
2120                 unset($item['wall']);
2121                 unset($item['origin']);
2122                 unset($item['starred']);
2123
2124                 $users = [];
2125
2126                 /// @todo add a field "pcid" in the contact table that referrs to the public contact id.
2127                 $owner = DBA::selectFirst('contact', ['url', 'nurl', 'alias'], ['id' => $parent['owner-id']]);
2128                 if (!DBA::isResult($owner)) {
2129                         return;
2130                 }
2131
2132                 $condition = ['nurl' => $owner['nurl'], 'rel' => [Contact::SHARING, Contact::FRIEND]];
2133                 $contacts = DBA::select('contact', ['uid'], $condition);
2134                 while ($contact = DBA::fetch($contacts)) {
2135                         if ($contact['uid'] == 0) {
2136                                 continue;
2137                         }
2138
2139                         $users[$contact['uid']] = $contact['uid'];
2140                 }
2141                 DBA::close($contacts);
2142
2143                 $condition = ['alias' => $owner['url'], 'rel' => [Contact::SHARING, Contact::FRIEND]];
2144                 $contacts = DBA::select('contact', ['uid'], $condition);
2145                 while ($contact = DBA::fetch($contacts)) {
2146                         if ($contact['uid'] == 0) {
2147                                 continue;
2148                         }
2149
2150                         $users[$contact['uid']] = $contact['uid'];
2151                 }
2152                 DBA::close($contacts);
2153
2154                 if (!empty($owner['alias'])) {
2155                         $condition = ['url' => $owner['alias'], 'rel' => [Contact::SHARING, Contact::FRIEND]];
2156                         $contacts = DBA::select('contact', ['uid'], $condition);
2157                         while ($contact = DBA::fetch($contacts)) {
2158                                 if ($contact['uid'] == 0) {
2159                                         continue;
2160                                 }
2161
2162                                 $users[$contact['uid']] = $contact['uid'];
2163                         }
2164                         DBA::close($contacts);
2165                 }
2166
2167                 $origin_uid = 0;
2168
2169                 if ($item['uri'] != $item['parent-uri']) {
2170                         $parents = self::select(['uid', 'origin'], ["`uri` = ? AND `uid` != 0", $item['parent-uri']]);
2171                         while ($parent = self::fetch($parents)) {
2172                                 $users[$parent['uid']] = $parent['uid'];
2173                                 if ($parent['origin'] && !$origin) {
2174                                         $origin_uid = $parent['uid'];
2175                                 }
2176                         }
2177                 }
2178
2179                 foreach ($users as $uid) {
2180                         if ($origin_uid == $uid) {
2181                                 $item['diaspora_signed_text'] = $signed_text;
2182                         }
2183                         self::storeForUser($itemid, $item, $uid);
2184                 }
2185         }
2186
2187         /**
2188          * @brief Store public items for the receivers
2189          *
2190          * @param integer $itemid Item ID that should be added
2191          * @param array   $item   The item entry that will be stored
2192          * @param integer $uid    The user that will receive the item entry
2193          * @throws \Exception
2194          */
2195         private static function storeForUser($itemid, $item, $uid)
2196         {
2197                 $item['uid'] = $uid;
2198                 $item['origin'] = 0;
2199                 $item['wall'] = 0;
2200                 if ($item['uri'] == $item['parent-uri']) {
2201                         $item['contact-id'] = Contact::getIdForURL($item['owner-link'], $uid);
2202                 } else {
2203                         $item['contact-id'] = Contact::getIdForURL($item['author-link'], $uid);
2204                 }
2205
2206                 if (empty($item['contact-id'])) {
2207                         $self = DBA::selectFirst('contact', ['id'], ['self' => true, 'uid' => $uid]);
2208                         if (!DBA::isResult($self)) {
2209                                 return;
2210                         }
2211                         $item['contact-id'] = $self['id'];
2212                 }
2213
2214                 /// @todo Handling of "event-id"
2215
2216                 $notify = false;
2217                 if ($item['uri'] == $item['parent-uri']) {
2218                         $contact = DBA::selectFirst('contact', [], ['id' => $item['contact-id'], 'self' => false]);
2219                         if (DBA::isResult($contact)) {
2220                                 $notify = self::isRemoteSelf($contact, $item);
2221                         }
2222                 }
2223
2224                 $distributed = self::insert($item, false, $notify, true);
2225
2226                 if (!$distributed) {
2227                         Logger::log("Distributed public item " . $itemid . " for user " . $uid . " wasn't stored", Logger::DEBUG);
2228                 } else {
2229                         Logger::log("Distributed public item " . $itemid . " for user " . $uid . " with id " . $distributed, Logger::DEBUG);
2230                 }
2231         }
2232
2233         /**
2234          * @brief Add a shadow entry for a given item id that is a thread starter
2235          *
2236          * We store every public item entry additionally with the user id "0".
2237          * This is used for the community page and for the search.
2238          * It is planned that in the future we will store public item entries only once.
2239          *
2240          * @param integer $itemid Item ID that should be added
2241          * @throws \Exception
2242          */
2243         public static function addShadow($itemid)
2244         {
2245                 $fields = ['uid', 'private', 'moderated', 'visible', 'deleted', 'network', 'uri'];
2246                 $condition = ['id' => $itemid, 'parent' => [0, $itemid]];
2247                 $item = self::selectFirst($fields, $condition);
2248
2249                 if (!DBA::isResult($item)) {
2250                         return;
2251                 }
2252
2253                 // is it already a copy?
2254                 if (($itemid == 0) || ($item['uid'] == 0)) {
2255                         return;
2256                 }
2257
2258                 // Is it a visible public post?
2259                 if (!$item["visible"] || $item["deleted"] || $item["moderated"] || $item["private"]) {
2260                         return;
2261                 }
2262
2263                 // is it an entry from a connector? Only add an entry for natively connected networks
2264                 if (!in_array($item["network"], array_merge(Protocol::FEDERATED ,['']))) {
2265                         return;
2266                 }
2267
2268                 if (self::exists(['uri' => $item['uri'], 'uid' => 0])) {
2269                         return;
2270                 }
2271
2272                 $item = self::selectFirst(self::ITEM_FIELDLIST, ['id' => $itemid]);
2273
2274                 if (DBA::isResult($item)) {
2275                         // Preparing public shadow (removing user specific data)
2276                         $item['uid'] = 0;
2277                         unset($item['id']);
2278                         unset($item['parent']);
2279                         unset($item['wall']);
2280                         unset($item['mention']);
2281                         unset($item['origin']);
2282                         unset($item['starred']);
2283                         unset($item['postopts']);
2284                         unset($item['inform']);
2285                         if ($item['uri'] == $item['parent-uri']) {
2286                                 $item['contact-id'] = $item['owner-id'];
2287                         } else {
2288                                 $item['contact-id'] = $item['author-id'];
2289                         }
2290
2291                         $public_shadow = self::insert($item, false, false, true);
2292
2293                         Logger::log("Stored public shadow for thread ".$itemid." under id ".$public_shadow, Logger::DEBUG);
2294                 }
2295         }
2296
2297         /**
2298          * @brief Add a shadow entry for a given item id that is a comment
2299          *
2300          * This function does the same like the function above - but for comments
2301          *
2302          * @param integer $itemid Item ID that should be added
2303          * @throws \Exception
2304          */
2305         public static function addShadowPost($itemid)
2306         {
2307                 $item = self::selectFirst(self::ITEM_FIELDLIST, ['id' => $itemid]);
2308                 if (!DBA::isResult($item)) {
2309                         return;
2310                 }
2311
2312                 // Is it a toplevel post?
2313                 if ($item['id'] == $item['parent']) {
2314                         self::addShadow($itemid);
2315                         return;
2316                 }
2317
2318                 // Is this a shadow entry?
2319                 if ($item['uid'] == 0) {
2320                         return;
2321                 }
2322
2323                 // Is there a shadow parent?
2324                 if (!self::exists(['uri' => $item['parent-uri'], 'uid' => 0])) {
2325                         return;
2326                 }
2327
2328                 // Is there already a shadow entry?
2329                 if (self::exists(['uri' => $item['uri'], 'uid' => 0])) {
2330                         return;
2331                 }
2332
2333                 // Save "origin" and "parent" state
2334                 $origin = $item['origin'];
2335                 $parent = $item['parent'];
2336
2337                 // Preparing public shadow (removing user specific data)
2338                 $item['uid'] = 0;
2339                 unset($item['id']);
2340                 unset($item['parent']);
2341                 unset($item['wall']);
2342                 unset($item['mention']);
2343                 unset($item['origin']);
2344                 unset($item['starred']);
2345                 unset($item['postopts']);
2346                 unset($item['inform']);
2347                 $item['contact-id'] = Contact::getIdForURL($item['author-link']);
2348
2349                 $public_shadow = self::insert($item, false, false, true);
2350
2351                 Logger::log("Stored public shadow for comment ".$item['uri']." under id ".$public_shadow, Logger::DEBUG);
2352
2353                 // If this was a comment to a Diaspora post we don't get our comment back.
2354                 // This means that we have to distribute the comment by ourselves.
2355                 if ($origin && self::exists(['id' => $parent, 'network' => Protocol::DIASPORA])) {
2356                         self::distribute($public_shadow);
2357                 }
2358         }
2359
2360         /**
2361          * Adds a language specification in a "language" element of given $arr.
2362          * Expects "body" element to exist in $arr.
2363          *
2364          * @param $item
2365          * @throws \Text_LanguageDetect_Exception
2366          */
2367         private static function addLanguageToItemArray(&$item)
2368         {
2369                 $naked_body = BBCode::toPlaintext($item['body'], false);
2370
2371                 $ld = new Text_LanguageDetect();
2372                 $ld->setNameMode(2);
2373                 $languages = $ld->detect($naked_body, 3);
2374
2375                 if (is_array($languages)) {
2376                         $item['language'] = json_encode($languages);
2377                 }
2378         }
2379
2380         /**
2381          * @brief Creates an unique guid out of a given uri
2382          *
2383          * @param string $uri uri of an item entry
2384          * @param string $host hostname for the GUID prefix
2385          * @return string unique guid
2386          */
2387         public static function guidFromUri($uri, $host)
2388         {
2389                 // Our regular guid routine is using this kind of prefix as well
2390                 // We have to avoid that different routines could accidentally create the same value
2391                 $parsed = parse_url($uri);
2392
2393                 // We use a hash of the hostname as prefix for the guid
2394                 $guid_prefix = hash("crc32", $host);
2395
2396                 // Remove the scheme to make sure that "https" and "http" doesn't make a difference
2397                 unset($parsed["scheme"]);
2398
2399                 // Glue it together to be able to make a hash from it
2400                 $host_id = implode("/", $parsed);
2401
2402                 // We could use any hash algorithm since it isn't a security issue
2403                 $host_hash = hash("ripemd128", $host_id);
2404
2405                 return $guid_prefix.$host_hash;
2406         }
2407
2408         /**
2409          * generate an unique URI
2410          *
2411          * @param integer $uid  User id
2412          * @param string  $guid An existing GUID (Otherwise it will be generated)
2413          *
2414          * @return string
2415          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
2416          */
2417         public static function newURI($uid, $guid = "")
2418         {
2419                 if ($guid == "") {
2420                         $guid = System::createUUID();
2421                 }
2422
2423                 return self::getApp()->getBaseURL() . '/objects/' . $guid;
2424         }
2425
2426         /**
2427          * @brief Set "success_update" and "last-item" to the date of the last time we heard from this contact
2428          *
2429          * This can be used to filter for inactive contacts.
2430          * Only do this for public postings to avoid privacy problems, since poco data is public.
2431          * Don't set this value if it isn't from the owner (could be an author that we don't know)
2432          *
2433          * @param array $arr Contains the just posted item record
2434          * @throws \Exception
2435          */
2436         private static function updateContact($arr)
2437         {
2438                 // Unarchive the author
2439                 $contact = DBA::selectFirst('contact', [], ['id' => $arr["author-id"]]);
2440                 if (DBA::isResult($contact)) {
2441                         Contact::unmarkForArchival($contact);
2442                 }
2443
2444                 // Unarchive the contact if it's not our own contact
2445                 $contact = DBA::selectFirst('contact', [], ['id' => $arr["contact-id"], 'self' => false]);
2446                 if (DBA::isResult($contact)) {
2447                         Contact::unmarkForArchival($contact);
2448                 }
2449
2450                 $update = (!$arr['private'] && ((defaults($arr, 'author-link', '') === defaults($arr, 'owner-link', '')) || ($arr["parent-uri"] === $arr["uri"])));
2451
2452                 // Is it a forum? Then we don't care about the rules from above
2453                 if (!$update && in_array($arr["network"], [Protocol::ACTIVITYPUB, Protocol::DFRN]) && ($arr["parent-uri"] === $arr["uri"])) {
2454                         if (DBA::exists('contact', ['id' => $arr['contact-id'], 'forum' => true])) {
2455                                 $update = true;
2456                         }
2457                 }
2458
2459                 if ($update) {
2460                         DBA::update('contact', ['success_update' => $arr['received'], 'last-item' => $arr['received']],
2461                                 ['id' => $arr['contact-id']]);
2462                 }
2463                 // Now do the same for the system wide contacts with uid=0
2464                 if (!$arr['private']) {
2465                         DBA::update('contact', ['success_update' => $arr['received'], 'last-item' => $arr['received']],
2466                                 ['id' => $arr['owner-id']]);
2467
2468                         if ($arr['owner-id'] != $arr['author-id']) {
2469                                 DBA::update('contact', ['success_update' => $arr['received'], 'last-item' => $arr['received']],
2470                                         ['id' => $arr['author-id']]);
2471                         }
2472                 }
2473         }
2474
2475         public static function setHashtags(&$item)
2476         {
2477                 $tags = BBCode::getTags($item["body"]);
2478
2479                 // No hashtags?
2480                 if (!count($tags)) {
2481                         return false;
2482                 }
2483
2484                 // What happens in [code], stays in [code]!
2485                 // escape the # and the [
2486                 // hint: we will also get in trouble with #tags, when we want markdown in posts -> ### Headline 3
2487                 $item["body"] = preg_replace_callback("/\[code(.*?)\](.*?)\[\/code\]/ism",
2488                         function ($match) {
2489                                 // we truly ESCape all # and [ to prevent gettin weird tags in [code] blocks
2490                                 $find = ['#', '['];
2491                                 $replace = [chr(27).'sharp', chr(27).'leftsquarebracket'];
2492                                 return ("[code" . $match[1] . "]" . str_replace($find, $replace, $match[2]) . "[/code]");
2493                         }, $item["body"]);
2494
2495                 // This sorting is important when there are hashtags that are part of other hashtags
2496                 // Otherwise there could be problems with hashtags like #test and #test2
2497                 rsort($tags);
2498
2499                 $URLSearchString = "^\[\]";
2500
2501                 // All hashtags should point to the home server if "local_tags" is activated
2502                 if (Config::get('system', 'local_tags')) {
2503                         $item["body"] = preg_replace("/#\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",
2504                                         "#[url=".System::baseUrl()."/search?tag=$2]$2[/url]", $item["body"]);
2505
2506                         $item["tag"] = preg_replace("/#\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",
2507                                         "#[url=".System::baseUrl()."/search?tag=$2]$2[/url]", $item["tag"]);
2508                 }
2509
2510                 // mask hashtags inside of url, bookmarks and attachments to avoid urls in urls
2511                 $item["body"] = preg_replace_callback("/\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",
2512                         function ($match) {
2513                                 return ("[url=" . str_replace("#", "&num;", $match[1]) . "]" . str_replace("#", "&num;", $match[2]) . "[/url]");
2514                         }, $item["body"]);
2515
2516                 $item["body"] = preg_replace_callback("/\[bookmark\=([$URLSearchString]*)\](.*?)\[\/bookmark\]/ism",
2517                         function ($match) {
2518                                 return ("[bookmark=" . str_replace("#", "&num;", $match[1]) . "]" . str_replace("#", "&num;", $match[2]) . "[/bookmark]");
2519                         }, $item["body"]);
2520
2521                 $item["body"] = preg_replace_callback("/\[attachment (.*)\](.*?)\[\/attachment\]/ism",
2522                         function ($match) {
2523                                 return ("[attachment " . str_replace("#", "&num;", $match[1]) . "]" . $match[2] . "[/attachment]");
2524                         }, $item["body"]);
2525
2526                 // Repair recursive urls
2527                 $item["body"] = preg_replace("/&num;\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",
2528                                 "&num;$2", $item["body"]);
2529
2530                 foreach ($tags as $tag) {
2531                         if ((strpos($tag, '#') !== 0) || strpos($tag, '[url=') || $tag[1] == '#') {
2532                                 continue;
2533                         }
2534
2535                         $basetag = str_replace('_',' ',substr($tag,1));
2536                         $newtag = '#[url=' . System::baseUrl() . '/search?tag=' . $basetag . ']' . $basetag . '[/url]';
2537
2538                         $item["body"] = str_replace($tag, $newtag, $item["body"]);
2539
2540                         if (!stristr($item["tag"], "/search?tag=" . $basetag . "]" . $basetag . "[/url]")) {
2541                                 if (strlen($item["tag"])) {
2542                                         $item["tag"] = ',' . $item["tag"];
2543                                 }
2544                                 $item["tag"] = $newtag . $item["tag"];
2545                         }
2546                 }
2547
2548                 // Convert back the masked hashtags
2549                 $item["body"] = str_replace("&num;", "#", $item["body"]);
2550
2551                 // Remember! What happens in [code], stays in [code]
2552                 // roleback the # and [
2553                 $item["body"] = preg_replace_callback("/\[code(.*?)\](.*?)\[\/code\]/ism",
2554                         function ($match) {
2555                                 // we truly unESCape all sharp and leftsquarebracket
2556                                 $find = [chr(27).'sharp', chr(27).'leftsquarebracket'];
2557                                 $replace = ['#', '['];
2558                                 return ("[code" . $match[1] . "]" . str_replace($find, $replace, $match[2]) . "[/code]");
2559                         }, $item["body"]);
2560         }
2561
2562         /**
2563          * look for mention tags and setup a second delivery chain for forum/community posts if appropriate
2564          *
2565          * @param int $uid
2566          * @param int $item_id
2567          * @return void true if item was deleted, else false
2568          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
2569          * @throws \ImagickException
2570          */
2571         private static function tagDeliver($uid, $item_id)
2572         {
2573                 $mention = false;
2574
2575                 $user = DBA::selectFirst('user', [], ['uid' => $uid]);
2576                 if (!DBA::isResult($user)) {
2577                         return;
2578                 }
2579
2580                 $community_page = (($user['page-flags'] == User::PAGE_FLAGS_COMMUNITY) ? true : false);
2581                 $prvgroup = (($user['page-flags'] == User::PAGE_FLAGS_PRVGROUP) ? true : false);
2582
2583                 $item = self::selectFirst(self::ITEM_FIELDLIST, ['id' => $item_id]);
2584                 if (!DBA::isResult($item)) {
2585                         return;
2586                 }
2587
2588                 $link = Strings::normaliseLink(System::baseUrl() . '/profile/' . $user['nickname']);
2589
2590                 /*
2591                  * Diaspora uses their own hardwired link URL in @-tags
2592                  * instead of the one we supply with webfinger
2593                  */
2594                 $dlink = Strings::normaliseLink(System::baseUrl() . '/u/' . $user['nickname']);
2595
2596                 $cnt = preg_match_all('/[\@\!]\[url\=(.*?)\](.*?)\[\/url\]/ism', $item['body'], $matches, PREG_SET_ORDER);
2597                 if ($cnt) {
2598                         foreach ($matches as $mtch) {
2599                                 if (Strings::compareLink($link, $mtch[1]) || Strings::compareLink($dlink, $mtch[1])) {
2600                                         $mention = true;
2601                                         Logger::log('mention found: ' . $mtch[2]);
2602                                 }
2603                         }
2604                 }
2605
2606                 if (!$mention) {
2607                         if (($community_page || $prvgroup) &&
2608                                   !$item['wall'] && !$item['origin'] && ($item['id'] == $item['parent'])) {
2609                                 // mmh.. no mention.. community page or private group... no wall.. no origin.. top-post (not a comment)
2610                                 // delete it!
2611                                 Logger::log("no-mention top-level post to community or private group. delete.");
2612                                 DBA::delete('item', ['id' => $item_id]);
2613                                 return true;
2614                         }
2615                         return;
2616                 }
2617
2618                 $arr = ['item' => $item, 'user' => $user];
2619
2620                 Hook::callAll('tagged', $arr);
2621
2622                 if (!$community_page && !$prvgroup) {
2623                         return;
2624                 }
2625
2626                 /*
2627                  * tgroup delivery - setup a second delivery chain
2628                  * prevent delivery looping - only proceed
2629                  * if the message originated elsewhere and is a top-level post
2630                  */
2631                 if ($item['wall'] || $item['origin'] || ($item['id'] != $item['parent'])) {
2632                         return;
2633                 }
2634
2635                 // now change this copy of the post to a forum head message and deliver to all the tgroup members
2636                 $self = DBA::selectFirst('contact', ['id', 'name', 'url', 'thumb'], ['uid' => $uid, 'self' => true]);
2637                 if (!DBA::isResult($self)) {
2638                         return;
2639                 }
2640
2641                 $owner_id = Contact::getIdForURL($self['url']);
2642
2643                 // also reset all the privacy bits to the forum default permissions
2644
2645                 $private = ($user['allow_cid'] || $user['allow_gid'] || $user['deny_cid'] || $user['deny_gid']) ? 1 : 0;
2646
2647                 $psid = PermissionSet::fetchIDForPost($user);
2648
2649                 $forum_mode = ($prvgroup ? 2 : 1);
2650
2651                 $fields = ['wall' => true, 'origin' => true, 'forum_mode' => $forum_mode, 'contact-id' => $self['id'],
2652                         'owner-id' => $owner_id, 'private' => $private, 'psid' => $psid];
2653                 self::update($fields, ['id' => $item_id]);
2654
2655                 self::updateThread($item_id);
2656
2657                 Worker::add(['priority' => PRIORITY_HIGH, 'dont_fork' => true], 'Notifier', Delivery::POST, $item_id);
2658         }
2659
2660         public static function isRemoteSelf($contact, &$datarray)
2661         {
2662                 $a = \get_app();
2663
2664                 if (!$contact['remote_self']) {
2665                         return false;
2666                 }
2667
2668                 // Prevent the forwarding of posts that are forwarded
2669                 if (!empty($datarray["extid"]) && ($datarray["extid"] == Protocol::DFRN)) {
2670                         Logger::log('Already forwarded', Logger::DEBUG);
2671                         return false;
2672                 }
2673
2674                 // Prevent to forward already forwarded posts
2675                 if ($datarray["app"] == $a->getHostName()) {
2676                         Logger::log('Already forwarded (second test)', Logger::DEBUG);
2677                         return false;
2678                 }
2679
2680                 // Only forward posts
2681                 if ($datarray["verb"] != ACTIVITY_POST) {
2682                         Logger::log('No post', Logger::DEBUG);
2683                         return false;
2684                 }
2685
2686                 if (($contact['network'] != Protocol::FEED) && $datarray['private']) {
2687                         Logger::log('Not public', Logger::DEBUG);
2688                         return false;
2689                 }
2690
2691                 $datarray2 = $datarray;
2692                 Logger::log('remote-self start - Contact '.$contact['url'].' - '.$contact['remote_self'].' Item '.print_r($datarray, true), Logger::DEBUG);
2693                 if ($contact['remote_self'] == 2) {
2694                         $self = DBA::selectFirst('contact', ['id', 'name', 'url', 'thumb'],
2695                                         ['uid' => $contact['uid'], 'self' => true]);
2696                         if (DBA::isResult($self)) {
2697                                 $datarray['contact-id'] = $self["id"];
2698
2699                                 $datarray['owner-name'] = $self["name"];
2700                                 $datarray['owner-link'] = $self["url"];
2701                                 $datarray['owner-avatar'] = $self["thumb"];
2702
2703                                 $datarray['author-name']   = $datarray['owner-name'];
2704                                 $datarray['author-link']   = $datarray['owner-link'];
2705                                 $datarray['author-avatar'] = $datarray['owner-avatar'];
2706
2707                                 unset($datarray['edited']);
2708
2709                                 unset($datarray['network']);
2710                                 unset($datarray['owner-id']);
2711                                 unset($datarray['author-id']);
2712                         }
2713
2714                         if ($contact['network'] != Protocol::FEED) {
2715                                 $datarray["guid"] = System::createUUID();
2716                                 unset($datarray["plink"]);
2717                                 $datarray["uri"] = self::newURI($contact['uid'], $datarray["guid"]);
2718                                 $datarray["parent-uri"] = $datarray["uri"];
2719                                 $datarray["thr-parent"] = $datarray["uri"];
2720                                 $datarray["extid"] = Protocol::DFRN;
2721                                 $urlpart = parse_url($datarray2['author-link']);
2722                                 $datarray["app"] = $urlpart["host"];
2723                         } else {
2724                                 $datarray['private'] = 0;
2725                         }
2726                 }
2727
2728                 if ($contact['network'] != Protocol::FEED) {
2729                         // Store the original post
2730                         $result = self::insert($datarray2, false, false);
2731                         Logger::log('remote-self post original item - Contact '.$contact['url'].' return '.$result.' Item '.print_r($datarray2, true), Logger::DEBUG);
2732                 } else {
2733                         $datarray["app"] = "Feed";
2734                         $result = true;
2735                 }
2736
2737                 // Trigger automatic reactions for addons
2738                 $datarray['api_source'] = true;
2739
2740                 // We have to tell the hooks who we are - this really should be improved
2741                 $_SESSION["authenticated"] = true;
2742                 $_SESSION["uid"] = $contact['uid'];
2743
2744                 return $result;
2745         }
2746
2747         /**
2748          *
2749          * @param string $s
2750          * @param int    $uid
2751          * @param array  $item
2752          * @param int    $cid
2753          * @return string
2754          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
2755          * @throws \ImagickException
2756          */
2757         public static function fixPrivatePhotos($s, $uid, $item = null, $cid = 0)
2758         {
2759                 if (Config::get('system', 'disable_embedded')) {
2760                         return $s;
2761                 }
2762
2763                 Logger::log('check for photos', Logger::DEBUG);
2764                 $site = substr(System::baseUrl(), strpos(System::baseUrl(), '://'));
2765
2766                 $orig_body = $s;
2767                 $new_body = '';
2768
2769                 $img_start = strpos($orig_body, '[img');
2770                 $img_st_close = ($img_start !== false ? strpos(substr($orig_body, $img_start), ']') : false);
2771                 $img_len = ($img_start !== false ? strpos(substr($orig_body, $img_start + $img_st_close + 1), '[/img]') : false);
2772
2773                 while (($img_st_close !== false) && ($img_len !== false)) {
2774                         $img_st_close++; // make it point to AFTER the closing bracket
2775                         $image = substr($orig_body, $img_start + $img_st_close, $img_len);
2776
2777                         Logger::log('found photo ' . $image, Logger::DEBUG);
2778
2779                         if (stristr($image, $site . '/photo/')) {
2780                                 // Only embed locally hosted photos
2781                                 $replace = false;
2782                                 $i = basename($image);
2783                                 $i = str_replace(['.jpg', '.png', '.gif'], ['', '', ''], $i);
2784                                 $x = strpos($i, '-');
2785
2786                                 if ($x) {
2787                                         $res = substr($i, $x + 1);
2788                                         $i = substr($i, 0, $x);
2789                                         $photo = Photo::getPhotoForUser($uid, $i, $res);
2790                                         if (DBA::isResult($photo)) {
2791                                                 /*
2792                                                  * Check to see if we should replace this photo link with an embedded image
2793                                                  * 1. No need to do so if the photo is public
2794                                                  * 2. If there's a contact-id provided, see if they're in the access list
2795                                                  *    for the photo. If so, embed it.
2796                                                  * 3. Otherwise, if we have an item, see if the item permissions match the photo
2797                                                  *    permissions, regardless of order but first check to see if they're an exact
2798                                                  *    match to save some processing overhead.
2799                                                  */
2800                                                 if (self::hasPermissions($photo)) {
2801                                                         if ($cid) {
2802                                                                 $recips = self::enumeratePermissions($photo);
2803                                                                 if (in_array($cid, $recips)) {
2804                                                                         $replace = true;
2805                                                                 }
2806                                                         } elseif ($item) {
2807                                                                 if (self::samePermissions($item, $photo)) {
2808                                                                         $replace = true;
2809                                                                 }
2810                                                         }
2811                                                 }
2812                                                 if ($replace) {
2813                                                         $photo_img = Photo::getImageForPhoto($photo);
2814                                                         // If a custom width and height were specified, apply before embedding
2815                                                         if (preg_match("/\[img\=([0-9]*)x([0-9]*)\]/is", substr($orig_body, $img_start, $img_st_close), $match)) {
2816                                                                 Logger::log('scaling photo', Logger::DEBUG);
2817
2818                                                                 $width = intval($match[1]);
2819                                                                 $height = intval($match[2]);
2820
2821                                                                 $photo_img->scaleDown(max($width, $height));
2822                                                         }
2823
2824                                                         $data = $photo_img->asString();
2825                                                         $type = $photo_img->getType();
2826
2827                                                         Logger::log('replacing photo', Logger::DEBUG);
2828                                                         $image = 'data:' . $type . ';base64,' . base64_encode($data);
2829                                                         Logger::log('replaced: ' . $image, Logger::DATA);
2830                                                 }
2831                                         }
2832                                 }
2833                         }
2834
2835                         $new_body = $new_body . substr($orig_body, 0, $img_start + $img_st_close) . $image . '[/img]';
2836                         $orig_body = substr($orig_body, $img_start + $img_st_close + $img_len + strlen('[/img]'));
2837                         if ($orig_body === false) {
2838                                 $orig_body = '';
2839                         }
2840
2841                         $img_start = strpos($orig_body, '[img');
2842                         $img_st_close = ($img_start !== false ? strpos(substr($orig_body, $img_start), ']') : false);
2843                         $img_len = ($img_start !== false ? strpos(substr($orig_body, $img_start + $img_st_close + 1), '[/img]') : false);
2844                 }
2845
2846                 $new_body = $new_body . $orig_body;
2847
2848                 return $new_body;
2849         }
2850
2851         private static function hasPermissions($obj)
2852         {
2853                 return !empty($obj['allow_cid']) || !empty($obj['allow_gid']) ||
2854                         !empty($obj['deny_cid']) || !empty($obj['deny_gid']);
2855         }
2856
2857         private static function samePermissions($obj1, $obj2)
2858         {
2859                 // first part is easy. Check that these are exactly the same.
2860                 if (($obj1['allow_cid'] == $obj2['allow_cid'])
2861                         && ($obj1['allow_gid'] == $obj2['allow_gid'])
2862                         && ($obj1['deny_cid'] == $obj2['deny_cid'])
2863                         && ($obj1['deny_gid'] == $obj2['deny_gid'])) {
2864                         return true;
2865                 }
2866
2867                 // This is harder. Parse all the permissions and compare the resulting set.
2868                 $recipients1 = self::enumeratePermissions($obj1);
2869                 $recipients2 = self::enumeratePermissions($obj2);
2870                 sort($recipients1);
2871                 sort($recipients2);
2872
2873                 /// @TODO Comparison of arrays, maybe use array_diff_assoc() here?
2874                 return ($recipients1 == $recipients2);
2875         }
2876
2877         // returns an array of contact-ids that are allowed to see this object
2878         public static function enumeratePermissions($obj)
2879         {
2880                 $allow_people = expand_acl($obj['allow_cid']);
2881                 $allow_groups = Group::expand(expand_acl($obj['allow_gid']));
2882                 $deny_people  = expand_acl($obj['deny_cid']);
2883                 $deny_groups  = Group::expand(expand_acl($obj['deny_gid']));
2884                 $recipients   = array_unique(array_merge($allow_people, $allow_groups));
2885                 $deny         = array_unique(array_merge($deny_people, $deny_groups));
2886                 $recipients   = array_diff($recipients, $deny);
2887                 return $recipients;
2888         }
2889
2890         public static function getFeedTags($item)
2891         {
2892                 $ret = [];
2893                 $matches = false;
2894                 $cnt = preg_match_all('|\#\[url\=(.*?)\](.*?)\[\/url\]|', $item['tag'], $matches);
2895                 if ($cnt) {
2896                         for ($x = 0; $x < $cnt; $x ++) {
2897                                 if ($matches[1][$x]) {
2898                                         $ret[$matches[2][$x]] = ['#', $matches[1][$x], $matches[2][$x]];
2899                                 }
2900                         }
2901                 }
2902                 $matches = false;
2903                 $cnt = preg_match_all('|\@\[url\=(.*?)\](.*?)\[\/url\]|', $item['tag'], $matches);
2904                 if ($cnt) {
2905                         for ($x = 0; $x < $cnt; $x ++) {
2906                                 if ($matches[1][$x]) {
2907                                         $ret[] = ['@', $matches[1][$x], $matches[2][$x]];
2908                                 }
2909                         }
2910                 }
2911                 return $ret;
2912         }
2913
2914         public static function expire($uid, $days, $network = "", $force = false)
2915         {
2916                 if (!$uid || ($days < 1)) {
2917                         return;
2918                 }
2919
2920                 $condition = ["`uid` = ? AND NOT `deleted` AND `id` = `parent` AND `gravity` = ?",
2921                         $uid, GRAVITY_PARENT];
2922
2923                 /*
2924                  * $expire_network_only = save your own wall posts
2925                  * and just expire conversations started by others
2926                  */
2927                 $expire_network_only = PConfig::get($uid, 'expire', 'network_only', false);
2928
2929                 if ($expire_network_only) {
2930                         $condition[0] .= " AND NOT `wall`";
2931                 }
2932
2933                 if ($network != "") {
2934                         $condition[0] .= " AND `network` = ?";
2935                         $condition[] = $network;
2936                 }
2937
2938                 $condition[0] .= " AND `received` < UTC_TIMESTAMP() - INTERVAL ? DAY";
2939                 $condition[] = $days;
2940
2941                 $items = self::select(['file', 'resource-id', 'starred', 'type', 'id', 'post-type'], $condition);
2942
2943                 if (!DBA::isResult($items)) {
2944                         return;
2945                 }
2946
2947                 $expire_items = PConfig::get($uid, 'expire', 'items', true);
2948
2949                 // Forcing expiring of items - but not notes and marked items
2950                 if ($force) {
2951                         $expire_items = true;
2952                 }
2953
2954                 $expire_notes = PConfig::get($uid, 'expire', 'notes', true);
2955                 $expire_starred = PConfig::get($uid, 'expire', 'starred', true);
2956                 $expire_photos = PConfig::get($uid, 'expire', 'photos', false);
2957
2958                 $expired = 0;
2959
2960                 while ($item = Item::fetch($items)) {
2961                         // don't expire filed items
2962
2963                         if (strpos($item['file'], '[') !== false) {
2964                                 continue;
2965                         }
2966
2967                         // Only expire posts, not photos and photo comments
2968
2969                         if (!$expire_photos && strlen($item['resource-id'])) {
2970                                 continue;
2971                         } elseif (!$expire_starred && intval($item['starred'])) {
2972                                 continue;
2973                         } elseif (!$expire_notes && (($item['type'] == 'note') || ($item['post-type'] == Item::PT_PERSONAL_NOTE))) {
2974                                 continue;
2975                         } elseif (!$expire_items && ($item['type'] != 'note') && ($item['post-type'] != Item::PT_PERSONAL_NOTE)) {
2976                                 continue;
2977                         }
2978
2979                         self::deleteById($item['id'], PRIORITY_LOW);
2980
2981                         ++$expired;
2982                 }
2983                 DBA::close($items);
2984                 Logger::log('User ' . $uid . ": expired $expired items; expire items: $expire_items, expire notes: $expire_notes, expire starred: $expire_starred, expire photos: $expire_photos");
2985         }
2986
2987         public static function firstPostDate($uid, $wall = false)
2988         {
2989                 $condition = ['uid' => $uid, 'wall' => $wall, 'deleted' => false, 'visible' => true, 'moderated' => false];
2990                 $params = ['order' => ['received' => false]];
2991                 $thread = DBA::selectFirst('thread', ['received'], $condition, $params);
2992                 if (DBA::isResult($thread)) {
2993                         return substr(DateTimeFormat::local($thread['received']), 0, 10);
2994                 }
2995                 return false;
2996         }
2997
2998         /**
2999          * @brief add/remove activity to an item
3000          *
3001          * Toggle activities as like,dislike,attend of an item
3002          *
3003          * @param string $item_id
3004          * @param string $verb
3005          *            Activity verb. One of
3006          *            like, unlike, dislike, undislike, attendyes, unattendyes,
3007          *            attendno, unattendno, attendmaybe, unattendmaybe
3008          * @return bool
3009          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
3010          * @throws \ImagickException
3011          * @hook  'post_local_end'
3012          *            array $arr
3013          *            'post_id' => ID of posted item
3014          */
3015         public static function performLike($item_id, $verb)
3016         {
3017                 if (!local_user() && !remote_user()) {
3018                         return false;
3019                 }
3020
3021                 switch ($verb) {
3022                         case 'like':
3023                         case 'unlike':
3024                                 $activity = ACTIVITY_LIKE;
3025                                 break;
3026                         case 'dislike':
3027                         case 'undislike':
3028                                 $activity = ACTIVITY_DISLIKE;
3029                                 break;
3030                         case 'attendyes':
3031                         case 'unattendyes':
3032                                 $activity = ACTIVITY_ATTEND;
3033                                 break;
3034                         case 'attendno':
3035                         case 'unattendno':
3036                                 $activity = ACTIVITY_ATTENDNO;
3037                                 break;
3038                         case 'attendmaybe':
3039                         case 'unattendmaybe':
3040                                 $activity = ACTIVITY_ATTENDMAYBE;
3041                                 break;
3042                         default:
3043                                 Logger::log('like: unknown verb ' . $verb . ' for item ' . $item_id);
3044                                 return false;
3045                 }
3046
3047                 // Enable activity toggling instead of on/off
3048                 $event_verb_flag = $activity === ACTIVITY_ATTEND || $activity === ACTIVITY_ATTENDNO || $activity === ACTIVITY_ATTENDMAYBE;
3049
3050                 Logger::log('like: verb ' . $verb . ' item ' . $item_id);
3051
3052                 $item = self::selectFirst(self::ITEM_FIELDLIST, ['`id` = ? OR `uri` = ?', $item_id, $item_id]);
3053                 if (!DBA::isResult($item)) {
3054                         Logger::log('like: unknown item ' . $item_id);
3055                         return false;
3056                 }
3057
3058                 $item_uri = $item['uri'];
3059
3060                 $uid = $item['uid'];
3061                 if (($uid == 0) && local_user()) {
3062                         $uid = local_user();
3063                 }
3064
3065                 if (!Security::canWriteToUserWall($uid)) {
3066                         Logger::log('like: unable to write on wall ' . $uid);
3067                         return false;
3068                 }
3069
3070                 // Retrieves the local post owner
3071                 $owner_self_contact = DBA::selectFirst('contact', [], ['uid' => $uid, 'self' => true]);
3072                 if (!DBA::isResult($owner_self_contact)) {
3073                         Logger::log('like: unknown owner ' . $uid);
3074                         return false;
3075                 }
3076
3077                 // Retrieve the current logged in user's public contact
3078                 $author_id = public_contact();
3079
3080                 $author_contact = DBA::selectFirst('contact', ['url'], ['id' => $author_id]);
3081                 if (!DBA::isResult($author_contact)) {
3082                         Logger::log('like: unknown author ' . $author_id);
3083                         return false;
3084                 }
3085
3086                 // Contact-id is the uid-dependant author contact
3087                 if (local_user() == $uid) {
3088                         $item_contact_id = $owner_self_contact['id'];
3089                 } else {
3090                         $item_contact_id = Contact::getIdForURL($author_contact['url'], $uid, true);
3091                         $item_contact = DBA::selectFirst('contact', [], ['id' => $item_contact_id]);
3092                         if (!DBA::isResult($item_contact)) {
3093                                 Logger::log('like: unknown item contact ' . $item_contact_id);
3094                                 return false;
3095                         }
3096                 }
3097
3098                 // Look for an existing verb row
3099                 // event participation are essentially radio toggles. If you make a subsequent choice,
3100                 // we need to eradicate your first choice.
3101                 if ($event_verb_flag) {
3102                         $verbs = [ACTIVITY_ATTEND, ACTIVITY_ATTENDNO, ACTIVITY_ATTENDMAYBE];
3103
3104                         // Translate to the index based activity index
3105                         $activities = [];
3106                         foreach ($verbs as $verb) {
3107                                 $activities[] = self::activityToIndex($verb);
3108                         }
3109                 } else {
3110                         $activities = self::activityToIndex($activity);
3111                 }
3112
3113                 $condition = ['activity' => $activities, 'deleted' => false, 'gravity' => GRAVITY_ACTIVITY,
3114                         'author-id' => $author_id, 'uid' => $item['uid'], 'thr-parent' => $item_uri];
3115
3116                 $like_item = self::selectFirst(['id', 'guid', 'verb'], $condition);
3117
3118                 // If it exists, mark it as deleted
3119                 if (DBA::isResult($like_item)) {
3120                         self::deleteById($like_item['id']);
3121
3122                         if (!$event_verb_flag || $like_item['verb'] == $activity) {
3123                                 return true;
3124                         }
3125                 }
3126
3127                 // Verb is "un-something", just trying to delete existing entries
3128                 if (strpos($verb, 'un') === 0) {
3129                         return true;
3130                 }
3131
3132                 $objtype = $item['resource-id'] ? ACTIVITY_OBJ_IMAGE : ACTIVITY_OBJ_NOTE;
3133
3134                 $new_item = [
3135                         'guid'          => System::createUUID(),
3136                         'uri'           => self::newURI($item['uid']),
3137                         'uid'           => $item['uid'],
3138                         'contact-id'    => $item_contact_id,
3139                         'wall'          => $item['wall'],
3140                         'origin'        => 1,
3141                         'network'       => Protocol::DFRN,
3142                         'gravity'       => GRAVITY_ACTIVITY,
3143                         'parent'        => $item['id'],
3144                         'parent-uri'    => $item['uri'],
3145                         'thr-parent'    => $item['uri'],
3146                         'owner-id'      => $author_id,
3147                         'author-id'     => $author_id,
3148                         'body'          => $activity,
3149                         'verb'          => $activity,
3150                         'object-type'   => $objtype,
3151                         'allow_cid'     => $item['allow_cid'],
3152                         'allow_gid'     => $item['allow_gid'],
3153                         'deny_cid'      => $item['deny_cid'],
3154                         'deny_gid'      => $item['deny_gid'],
3155                         'visible'       => 1,
3156                         'unseen'        => 1,
3157                 ];
3158
3159                 $signed = Diaspora::createLikeSignature($uid, $new_item);
3160                 if (!empty($signed)) {
3161                         $new_item['diaspora_signed_text'] = json_encode($signed);
3162                 }
3163
3164                 $new_item_id = self::insert($new_item);
3165
3166                 // If the parent item isn't visible then set it to visible
3167                 if (!$item['visible']) {
3168                         self::update(['visible' => true], ['id' => $item['id']]);
3169                 }
3170
3171                 $new_item['id'] = $new_item_id;
3172
3173                 Hook::callAll('post_local_end', $new_item);
3174
3175                 return true;
3176         }
3177
3178         private static function addThread($itemid, $onlyshadow = false)
3179         {
3180                 $fields = ['uid', 'created', 'edited', 'commented', 'received', 'changed', 'wall', 'private', 'pubmail',
3181                         'moderated', 'visible', 'starred', 'contact-id', 'post-type',
3182                         'deleted', 'origin', 'forum_mode', 'mention', 'network', 'author-id', 'owner-id'];
3183                 $condition = ["`id` = ? AND (`parent` = ? OR `parent` = 0)", $itemid, $itemid];
3184                 $item = self::selectFirst($fields, $condition);
3185
3186                 if (!DBA::isResult($item)) {
3187                         return;
3188                 }
3189
3190                 $item['iid'] = $itemid;
3191
3192                 if (!$onlyshadow) {
3193                         $result = DBA::insert('thread', $item);
3194
3195                         Logger::log("Add thread for item ".$itemid." - ".print_r($result, true), Logger::DEBUG);
3196                 }
3197         }
3198
3199         private static function updateThread($itemid, $setmention = false)
3200         {
3201                 $fields = ['uid', 'guid', 'created', 'edited', 'commented', 'received', 'changed', 'post-type',
3202                         'wall', 'private', 'pubmail', 'moderated', 'visible', 'starred', 'contact-id',
3203                         'deleted', 'origin', 'forum_mode', 'network', 'author-id', 'owner-id'];
3204                 $condition = ["`id` = ? AND (`parent` = ? OR `parent` = 0)", $itemid, $itemid];
3205
3206                 $item = self::selectFirst($fields, $condition);
3207                 if (!DBA::isResult($item)) {
3208                         return;
3209                 }
3210
3211                 if ($setmention) {
3212                         $item["mention"] = 1;
3213                 }
3214
3215                 $fields = [];
3216
3217                 foreach ($item as $field => $data) {
3218                         if (!in_array($field, ["guid"])) {
3219                                 $fields[$field] = $data;
3220                         }
3221                 }
3222
3223                 $result = DBA::update('thread', $fields, ['iid' => $itemid]);
3224
3225                 Logger::log("Update thread for item ".$itemid." - guid ".$item["guid"]." - ".(int)$result, Logger::DEBUG);
3226         }
3227
3228         private static function deleteThread($itemid, $itemuri = "")
3229         {
3230                 $item = DBA::selectFirst('thread', ['uid'], ['iid' => $itemid]);
3231                 if (!DBA::isResult($item)) {
3232                         Logger::log('No thread found for id '.$itemid, Logger::DEBUG);
3233                         return;
3234                 }
3235
3236                 $result = DBA::delete('thread', ['iid' => $itemid], ['cascade' => false]);
3237
3238                 Logger::log("deleteThread: Deleted thread for item ".$itemid." - ".print_r($result, true), Logger::DEBUG);
3239
3240                 if ($itemuri != "") {
3241                         $condition = ["`uri` = ? AND NOT `deleted` AND NOT (`uid` IN (?, 0))", $itemuri, $item["uid"]];
3242                         if (!self::exists($condition)) {
3243                                 DBA::delete('item', ['uri' => $itemuri, 'uid' => 0]);
3244                                 Logger::log("deleteThread: Deleted shadow for item ".$itemuri, Logger::DEBUG);
3245                         }
3246                 }
3247         }
3248
3249         public static function getPermissionsSQLByUserId($owner_id, $remote_verified = false, $groups = null, $remote_cid = null)
3250         {
3251                 $local_user = local_user();
3252                 $remote_user = remote_user();
3253
3254                 /*
3255                  * Construct permissions
3256                  *
3257                  * default permissions - anonymous user
3258                  */
3259                 $sql = " AND NOT `item`.`private`";
3260
3261                 // Profile owner - everything is visible
3262                 if ($local_user && ($local_user == $owner_id)) {
3263                         $sql = '';
3264                 } elseif ($remote_user) {
3265                         /*
3266                          * Authenticated visitor. Unless pre-verified,
3267                          * check that the contact belongs to this $owner_id
3268                          * and load the groups the visitor belongs to.
3269                          * If pre-verified, the caller is expected to have already
3270                          * done this and passed the groups into this function.
3271                          */
3272                         $set = PermissionSet::get($owner_id, $remote_cid, $groups);
3273
3274                         if (!empty($set)) {
3275                                 $sql_set = " OR (`item`.`private` IN (1,2) AND `item`.`wall` AND `item`.`psid` IN (" . implode(',', $set) . "))";
3276                         } else {
3277                                 $sql_set = '';
3278                         }
3279
3280                         $sql = " AND (NOT `item`.`private`" . $sql_set . ")";
3281                 }
3282
3283                 return $sql;
3284         }
3285
3286         /**
3287          * get translated item type
3288          *
3289          * @param $item
3290          * @return string
3291          */
3292         public static function postType($item)
3293         {
3294                 if (!empty($item['event-id'])) {
3295                         return L10n::t('event');
3296                 } elseif (!empty($item['resource-id'])) {
3297                         return L10n::t('photo');
3298                 } elseif (!empty($item['verb']) && $item['verb'] !== ACTIVITY_POST) {
3299                         return L10n::t('activity');
3300                 } elseif ($item['id'] != $item['parent']) {
3301                         return L10n::t('comment');
3302                 }
3303
3304                 return L10n::t('post');
3305         }
3306
3307         /**
3308          * Sets the "rendered-html" field of the provided item
3309          *
3310          * Body is preserved to avoid side-effects as we modify it just-in-time for spoilers and private image links
3311          *
3312          * @param array $item
3313          * @param bool  $update
3314          *
3315          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
3316          * @todo Remove reference, simply return "rendered-html" and "rendered-hash"
3317          */
3318         public static function putInCache(&$item, $update = false)
3319         {
3320                 $body = $item["body"];
3321
3322                 $rendered_hash = defaults($item, 'rendered-hash', '');
3323                 $rendered_html = defaults($item, 'rendered-html', '');
3324
3325                 if ($rendered_hash == ''
3326                         || $rendered_html == ""
3327                         || $rendered_hash != hash("md5", $item["body"])
3328                         || Config::get("system", "ignore_cache")
3329                 ) {
3330                         $a = self::getApp();
3331                         redir_private_images($a, $item);
3332
3333                         $item["rendered-html"] = prepare_text($item["body"]);
3334                         $item["rendered-hash"] = hash("md5", $item["body"]);
3335
3336                         $hook_data = ['item' => $item, 'rendered-html' => $item['rendered-html'], 'rendered-hash' => $item['rendered-hash']];
3337                         Hook::callAll('put_item_in_cache', $hook_data);
3338                         $item['rendered-html'] = $hook_data['rendered-html'];
3339                         $item['rendered-hash'] = $hook_data['rendered-hash'];
3340                         unset($hook_data);
3341
3342                         // Force an update if the generated values differ from the existing ones
3343                         if ($rendered_hash != $item["rendered-hash"]) {
3344                                 $update = true;
3345                         }
3346
3347                         // Only compare the HTML when we forcefully ignore the cache
3348                         if (Config::get("system", "ignore_cache") && ($rendered_html != $item["rendered-html"])) {
3349                                 $update = true;
3350                         }
3351
3352                         if ($update && !empty($item["id"])) {
3353                                 self::update(
3354                                         [
3355                                                 'rendered-html' => $item["rendered-html"],
3356                                                 'rendered-hash' => $item["rendered-hash"]
3357                                         ],
3358                                         ['id' => $item["id"]]
3359                                 );
3360                         }
3361                 }
3362
3363                 $item["body"] = $body;
3364         }
3365
3366         /**
3367          * @brief Given an item array, convert the body element from bbcode to html and add smilie icons.
3368          * If attach is true, also add icons for item attachments.
3369          *
3370          * @param array   $item
3371          * @param boolean $attach
3372          * @param boolean $is_preview
3373          * @return string item body html
3374          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
3375          * @throws \ImagickException
3376          * @hook  prepare_body_init item array before any work
3377          * @hook  prepare_body_content_filter ('item'=>item array, 'filter_reasons'=>string array) before first bbcode to html
3378          * @hook  prepare_body ('item'=>item array, 'html'=>body string, 'is_preview'=>boolean, 'filter_reasons'=>string array) after first bbcode to html
3379          * @hook  prepare_body_final ('item'=>item array, 'html'=>body string) after attach icons and blockquote special case handling (spoiler, author)
3380          */
3381         public static function prepareBody(array &$item, $attach = false, $is_preview = false)
3382         {
3383                 $a = self::getApp();
3384                 Hook::callAll('prepare_body_init', $item);
3385
3386                 // In order to provide theme developers more possibilities, event items
3387                 // are treated differently.
3388                 if ($item['object-type'] === ACTIVITY_OBJ_EVENT && isset($item['event-id'])) {
3389                         $ev = Event::getItemHTML($item);
3390                         return $ev;
3391                 }
3392
3393                 $tags = Term::populateTagsFromItem($item);
3394
3395                 $item['tags'] = $tags['tags'];
3396                 $item['hashtags'] = $tags['hashtags'];
3397                 $item['mentions'] = $tags['mentions'];
3398
3399                 // Compile eventual content filter reasons
3400                 $filter_reasons = [];
3401                 if (!$is_preview && public_contact() != $item['author-id']) {
3402                         if (!empty($item['content-warning']) && (!local_user() || !PConfig::get(local_user(), 'system', 'disable_cw', false))) {
3403                                 $filter_reasons[] = L10n::t('Content warning: %s', $item['content-warning']);
3404                         }
3405
3406                         $hook_data = [
3407                                 'item' => $item,
3408                                 'filter_reasons' => $filter_reasons
3409                         ];
3410                         Hook::callAll('prepare_body_content_filter', $hook_data);
3411                         $filter_reasons = $hook_data['filter_reasons'];
3412                         unset($hook_data);
3413                 }
3414
3415                 // Update the cached values if there is no "zrl=..." on the links.
3416                 $update = (!local_user() && !remote_user() && ($item["uid"] == 0));
3417
3418                 // Or update it if the current viewer is the intented viewer.
3419                 if (($item["uid"] == local_user()) && ($item["uid"] != 0)) {
3420                         $update = true;
3421                 }
3422
3423                 self::putInCache($item, $update);
3424                 $s = $item["rendered-html"];
3425
3426                 $hook_data = [
3427                         'item' => $item,
3428                         'html' => $s,
3429                         'preview' => $is_preview,
3430                         'filter_reasons' => $filter_reasons
3431                 ];
3432                 Hook::callAll('prepare_body', $hook_data);
3433                 $s = $hook_data['html'];
3434                 unset($hook_data);
3435
3436                 if (!$attach) {
3437                         // Replace the blockquotes with quotes that are used in mails.
3438                         $mailquote = '<blockquote type="cite" class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">';
3439                         $s = str_replace(['<blockquote>', '<blockquote class="spoiler">', '<blockquote class="author">'], [$mailquote, $mailquote, $mailquote], $s);
3440                         return $s;
3441                 }
3442
3443                 $as = '';
3444                 $vhead = false;
3445                 $matches = [];
3446                 preg_match_all('|\[attach\]href=\"(.*?)\" length=\"(.*?)\" type=\"(.*?)\"(?: title=\"(.*?)\")?|', $item['attach'], $matches, PREG_SET_ORDER);
3447                 foreach ($matches as $mtch) {
3448                         $mime = $mtch[3];
3449
3450                         $the_url = Contact::magicLinkById($item['author-id'], $mtch[1]);
3451
3452                         if (strpos($mime, 'video') !== false) {
3453                                 if (!$vhead) {
3454                                         $vhead = true;
3455                                         $a->page['htmlhead'] .= Renderer::replaceMacros(Renderer::getMarkupTemplate('videos_head.tpl'));
3456                                 }
3457
3458                                 $url_parts = explode('/', $the_url);
3459                                 $id = end($url_parts);
3460                                 $as .= Renderer::replaceMacros(Renderer::getMarkupTemplate('video_top.tpl'), [
3461                                         '$video' => [
3462                                                 'id'     => $id,
3463                                                 'title'  => L10n::t('View Video'),
3464                                                 'src'    => $the_url,
3465                                                 'mime'   => $mime,
3466                                         ],
3467                                 ]);
3468                         }
3469
3470                         $filetype = strtolower(substr($mime, 0, strpos($mime, '/')));
3471                         if ($filetype) {
3472                                 $filesubtype = strtolower(substr($mime, strpos($mime, '/') + 1));
3473                                 $filesubtype = str_replace('.', '-', $filesubtype);
3474                         } else {
3475                                 $filetype = 'unkn';
3476                                 $filesubtype = 'unkn';
3477                         }
3478
3479                         $title = Strings::escapeHtml(trim(defaults($mtch, 4, $mtch[1])));
3480                         $title .= ' ' . $mtch[2] . ' ' . L10n::t('bytes');
3481
3482                         $icon = '<div class="attachtype icon s22 type-' . $filetype . ' subtype-' . $filesubtype . '"></div>';
3483                         $as .= '<a href="' . strip_tags($the_url) . '" title="' . $title . '" class="attachlink" target="_blank" >' . $icon . '</a>';
3484                 }
3485
3486                 if ($as != '') {
3487                         $s .= '<div class="body-attach">'.$as.'<div class="clear"></div></div>';
3488                 }
3489
3490                 // Map.
3491                 if (strpos($s, '<div class="map">') !== false && !empty($item['coord'])) {
3492                         $x = Map::byCoordinates(trim($item['coord']));
3493                         if ($x) {
3494                                 $s = preg_replace('/\<div class\=\"map\"\>/', '$0' . $x, $s);
3495                         }
3496                 }
3497
3498
3499                 // Look for spoiler.
3500                 $spoilersearch = '<blockquote class="spoiler">';
3501
3502                 // Remove line breaks before the spoiler.
3503                 while ((strpos($s, "\n" . $spoilersearch) !== false)) {
3504                         $s = str_replace("\n" . $spoilersearch, $spoilersearch, $s);
3505                 }
3506                 while ((strpos($s, "<br />" . $spoilersearch) !== false)) {
3507                         $s = str_replace("<br />" . $spoilersearch, $spoilersearch, $s);
3508                 }
3509
3510                 while ((strpos($s, $spoilersearch) !== false)) {
3511                         $pos = strpos($s, $spoilersearch);
3512                         $rnd = Strings::getRandomHex(8);
3513                         $spoilerreplace = '<br /> <span id="spoiler-wrap-' . $rnd . '" class="spoiler-wrap fakelink" onclick="openClose(\'spoiler-' . $rnd . '\');">' . L10n::t('Click to open/close') . '</span>'.
3514                                                 '<blockquote class="spoiler" id="spoiler-' . $rnd . '" style="display: none;">';
3515                         $s = substr($s, 0, $pos) . $spoilerreplace . substr($s, $pos + strlen($spoilersearch));
3516                 }
3517
3518                 // Look for quote with author.
3519                 $authorsearch = '<blockquote class="author">';
3520
3521                 while ((strpos($s, $authorsearch) !== false)) {
3522                         $pos = strpos($s, $authorsearch);
3523                         $rnd = Strings::getRandomHex(8);
3524                         $authorreplace = '<br /> <span id="author-wrap-' . $rnd . '" class="author-wrap fakelink" onclick="openClose(\'author-' . $rnd . '\');">' . L10n::t('Click to open/close') . '</span>'.
3525                                                 '<blockquote class="author" id="author-' . $rnd . '" style="display: block;">';
3526                         $s = substr($s, 0, $pos) . $authorreplace . substr($s, $pos + strlen($authorsearch));
3527                 }
3528
3529                 // Replace friendica image url size with theme preference.
3530                 if (!empty($a->theme_info['item_image_size'])) {
3531                         $ps = $a->theme_info['item_image_size'];
3532                         $s = preg_replace('|(<img[^>]+src="[^"]+/photo/[0-9a-f]+)-[0-9]|', "$1-" . $ps, $s);
3533                 }
3534
3535                 $s = HTML::applyContentFilter($s, $filter_reasons);
3536
3537                 $hook_data = ['item' => $item, 'html' => $s];
3538                 Hook::callAll('prepare_body_final', $hook_data);
3539
3540                 return $hook_data['html'];
3541         }
3542
3543         /**
3544          * get private link for item
3545          *
3546          * @param array $item
3547          * @return boolean|array False if item has not plink, otherwise array('href'=>plink url, 'title'=>translated title)
3548          * @throws \Exception
3549          */
3550         public static function getPlink($item)
3551         {
3552                 $a = self::getApp();
3553
3554                 if ($a->user['nickname'] != "") {
3555                         $ret = [
3556                                 'href' => "display/" . $item['guid'],
3557                                 'orig' => "display/" . $item['guid'],
3558                                 'title' => L10n::t('View on separate page'),
3559                                 'orig_title' => L10n::t('view on separate page'),
3560                         ];
3561
3562                         if (!empty($item['plink'])) {
3563                                 $ret["href"] = $a->removeBaseURL($item['plink']);
3564                                 $ret["title"] = L10n::t('link to source');
3565                         }
3566
3567                 } elseif (!empty($item['plink']) && ($item['private'] != 1)) {
3568                         $ret = [
3569                                 'href' => $item['plink'],
3570                                 'orig' => $item['plink'],
3571                                 'title' => L10n::t('link to source'),
3572                         ];
3573                 } else {
3574                         $ret = [];
3575                 }
3576
3577                 return $ret;
3578         }
3579
3580         /**
3581          * Is the given item array a post that is sent as starting post to a forum?
3582          *
3583          * @param array $item
3584          * @param array $owner
3585          *
3586          * @return boolean "true" when it is a forum post
3587          */
3588         public static function isForumPost(array $item, array $owner = [])
3589         {
3590                 if (empty($owner)) {
3591                         $owner = User::getOwnerDataById($item['uid']);
3592                         if (empty($owner)) {
3593                                 return false;
3594                         }
3595                 }
3596
3597                 if (($item['author-id'] == $item['owner-id']) ||
3598                         ($owner['id'] == $item['contact-id']) ||
3599                         ($item['uri'] != $item['parent-uri']) ||
3600                         $item['origin']) {
3601                         return false;
3602                 }
3603
3604                 return Contact::isForum($item['contact-id']);
3605         }
3606
3607         /**
3608          * Search item id for given URI or plink
3609          *
3610          * @param string $uri
3611          * @param integer $uid
3612          *
3613          * @return integer item id
3614          */
3615         public static function searchByLink($uri, $uid = 0)
3616         {
3617                 $ssl_uri = str_replace('http://', 'https://', $uri);
3618                 $uris = [$uri, $ssl_uri, Strings::normaliseLink($uri)];
3619
3620                 $item = DBA::selectFirst('item', ['id'], ['uri' => $uris, 'uid' => $uid]);
3621                 if (DBA::isResult($item)) {
3622                         return $item['id'];
3623                 }
3624
3625                 $itemcontent = DBA::selectFirst('item-content', ['uri-id'], ['plink' => $uris]);
3626                 if (!DBA::isResult($itemcontent)) {
3627                         return 0;
3628                 }
3629
3630                 $itemuri = DBA::selectFirst('item-uri', ['uri'], ['id' => $itemcontent['uri-id']]);
3631                 if (!DBA::isResult($itemuri)) {
3632                         return 0;
3633                 }
3634
3635                 $item = DBA::selectFirst('item', ['id'], ['uri' => $itemuri['uri'], 'uid' => $uid]);
3636                 if (DBA::isResult($item)) {
3637                         return $item['id'];
3638                 }
3639
3640                 return 0;
3641         }
3642
3643         /**
3644          * Fetches item for given URI or plink
3645          *
3646          * @param string $uri
3647          * @param integer $uid
3648          *
3649          * @return integer item id
3650          */
3651         public static function fetchByLink($uri, $uid = 0)
3652         {
3653                 $item_id = self::searchByLink($uri, $uid);
3654                 if (!empty($item_id)) {
3655                         return $item_id;
3656                 }
3657
3658                 if (ActivityPub\Processor::fetchMissingActivity($uri)) {
3659                         $item_id = self::searchByLink($uri, $uid);
3660                 } else {
3661                         $item_id = Diaspora::fetchByURL($uri);
3662                 }
3663
3664                 if (!empty($item_id)) {
3665                         return $item_id;
3666                 }
3667
3668                 return 0;
3669         }
3670 }