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