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