src/Model/Item.php

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