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;
  11 use Friendica\Core\Addon;
  12 use Friendica\Core\Config;
  13 use Friendica\Core\L10n;
  14 use Friendica\Core\PConfig;
  15 use Friendica\Core\System;
  16 use Friendica\Core\Worker;
  17 use Friendica\Database\DBM;
  18 use Friendica\Model\Contact;
  19 use Friendica\Model\Conversation;
  20 use Friendica\Model\Group;
  21 use Friendica\Model\Term;
  22 use Friendica\Object\Image;
  23 use Friendica\Protocol\Diaspora;
  24 use Friendica\Protocol\OStatus;
  25 use Friendica\Util\DateTimeFormat;
  26 use Friendica\Util\XML;
  27 use Friendica\Util\Lock;
  28 use dba;
  29 use Text_LanguageDetect;
  30
  31 require_once 'boot.php';
  32 require_once 'include/items.php';
  33 require_once 'include/text.php';
  34
  35 class Item extends BaseObject
  36 {
  37         // Field list that is used to display the items
  38         const DISPLAY_FIELDLIST = ['uid', 'id', 'parent', 'uri', 'thr-parent', 'parent-uri', 'guid', 'network',
  39                         'commented', 'created', 'edited', 'received', 'verb', 'object-type', 'postopts', 'plink',
  40                         'wall', 'private', 'starred', 'origin', 'title', 'body', 'file', 'attach', 'language',
  41                         'content-warning', 'location', 'coord', 'app', 'rendered-hash', 'rendered-html', 'object',
  42                         'allow_cid', 'allow_gid', 'deny_cid', 'deny_gid', 'item_id',
  43                         'author-id', 'author-link', 'author-name', 'author-avatar', 'author-network',
  44                         'owner-id', 'owner-link', 'owner-name', 'owner-avatar', 'owner-network',
  45                         'contact-id', 'contact-link', 'contact-name', 'contact-avatar',
  46                         'writable', 'self', 'cid', 'alias',
  47                         'event-id', 'event-created', 'event-edited', 'event-start', 'event-finish',
  48                         'event-summary', 'event-desc', 'event-location', 'event-type',
  49                         'event-nofinish', 'event-adjust', 'event-ignore', 'event-id'];
  50
  51         // Field list that is used to deliver items via the protocols
  52         const DELIVER_FIELDLIST = ['uid', 'id', 'parent', 'uri', 'thr-parent', 'parent-uri', 'guid',
  53                         'created', 'edited', 'verb', 'object-type', 'object', 'target',
  54                         'private', 'title', 'body', 'location', 'coord', 'app',
  55                         'attach', 'tag', 'bookmark', 'deleted', 'extid',
  56                         'allow_cid', 'allow_gid', 'deny_cid', 'deny_gid',
  57                         'author-id', 'author-link', 'owner-link', 'contact-uid',
  58                         'signed_text', 'signature', 'signer'];
  59
  60         // Field list for "item-content" table that is mixed with the item table
  61         const MIXED_CONTENT_FIELDLIST = ['title', 'content-warning', 'body', 'location',
  62                         'coord', 'app', 'rendered-hash', 'rendered-html', 'verb',
  63                         'object-type', 'object', 'target-type', 'target', 'plink'];
  64
  65         // Field list for "item-content" table that is not present in the "item" table
  66         const CONTENT_FIELDLIST = ['language'];
  67
  68         // All fields in the item table
  69         const ITEM_FIELDLIST = ['id', 'uid', 'parent', 'uri', 'parent-uri', 'thr-parent', 'guid',
  70                         'contact-id', 'type', 'wall', 'gravity', 'extid', 'icid', 'iaid',
  71                         'created', 'edited', 'commented', 'received', 'changed', 'verb',
  72                         'postopts', 'plink', 'resource-id', 'event-id', 'tag', 'attach', 'inform',
  73                         'file', 'allow_cid', 'allow_gid', 'deny_cid', 'deny_gid',
  74                         'private', 'pubmail', 'moderated', 'visible', 'starred', 'bookmark',
  75                         'unseen', 'deleted', 'origin', 'forum_mode', 'mention', 'global', 'network',
  76                         'title', 'content-warning', 'body', 'location', 'coord', 'app',
  77                         'rendered-hash', 'rendered-html', 'object-type', 'object', 'target-type', 'target',
  78                         'author-id', 'author-link', 'author-name', 'author-avatar',
  79                         'owner-id', 'owner-link', 'owner-name', 'owner-avatar'];
  80
  81         const ACTIVITIES = [ACTIVITY_LIKE, ACTIVITY_DISLIKE, ACTIVITY_ATTEND, ACTIVITY_ATTENDNO, ACTIVITY_ATTENDMAYBE];
  82
  83         /**
  84          * @brief returns an activity index from an activity string
  85          *
  86          * @param string $activity activity string
  87          * @return integer Activity index
  88          */
  89         public static function activityToIndex($activity)
  90         {
  91                 $index = array_search($activity, self::ACTIVITIES);
  92
  93                 if (is_bool($index)) {
  94                         $index = -1;
  95                 }
  96
  97                 return $index;
  98         }
  99
 100         /**
 101          * @brief returns an activity string from an activity index
 102          *
 103          * @param integer $index activity index
 104          * @return string Activity string
 105          */
 106         public static function indexToActivity($index)
 107         {
 108                 if (!isset(self::ACTIVITIES[$index])) {
 109                         return '';
 110                 }
 111
 112                 return self::ACTIVITIES[$index];
 113         }
 114
 115         /**
 116          * @brief Fetch a single item row
 117          *
 118          * @param mixed $stmt statement object
 119          * @return array current row
 120          */
 121         public static function fetch($stmt)
 122         {
 123                 $row = dba::fetch($stmt);
 124
 125                 if (is_bool($row)) {
 126                         return $row;
 127                 }
 128
 129                 // ---------------------- Transform item structure data ----------------------
 130
 131                 // We prefer the data from the user's contact over the public one
 132                 if (!empty($row['author-link']) && !empty($row['contact-link']) &&
 133                         ($row['author-link'] == $row['contact-link'])) {
 134                         if (isset($row['author-avatar']) && !empty($row['contact-avatar'])) {
 135                                 $row['author-avatar'] = $row['contact-avatar'];
 136                         }
 137                         if (isset($row['author-name']) && !empty($row['contact-name'])) {
 138                                 $row['author-name'] = $row['contact-name'];
 139                         }
 140                 }
 141
 142                 if (!empty($row['owner-link']) && !empty($row['contact-link']) &&
 143                         ($row['owner-link'] == $row['contact-link'])) {
 144                         if (isset($row['owner-avatar']) && !empty($row['contact-avatar'])) {
 145                                 $row['owner-avatar'] = $row['contact-avatar'];
 146                         }
 147                         if (isset($row['owner-name']) && !empty($row['contact-name'])) {
 148                                 $row['owner-name'] = $row['contact-name'];
 149                         }
 150                 }
 151
 152                 // We can always comment on posts from these networks
 153                 if (array_key_exists('writable', $row) &&
 154                         in_array($row['internal-network'], [NETWORK_DFRN, NETWORK_DIASPORA, NETWORK_OSTATUS])) {
 155                         $row['writable'] = true;
 156                 }
 157
 158                 // ---------------------- Transform item content data ----------------------
 159
 160                 // Fetch data from the item-content table whenever there is content there
 161                 foreach (self::MIXED_CONTENT_FIELDLIST as $field) {
 162                         if (empty($row[$field]) && !empty($row['internal-item-' . $field])) {
 163                                 $row[$field] = $row['internal-item-' . $field];
 164                         }
 165                         unset($row['internal-item-' . $field]);
 166                 }
 167
 168                 if (!empty($row['internal-iaid']) && array_key_exists('verb', $row)) {
 169                         $row['verb'] = self::indexToActivity($row['internal-activity']);
 170                         if (array_key_exists('title', $row)) {
 171                                 $row['title'] = '';
 172                         }
 173                         if (array_key_exists('body', $row)) {
 174                                 $row['body'] = $row['verb'];
 175                         }
 176                         if (array_key_exists('object', $row)) {
 177                                 $row['object'] = '';
 178                         }
 179                         if (array_key_exists('object-type', $row)) {
 180                                 $row['object-type'] = ACTIVITY_OBJ_NOTE;
 181                         }
 182                 } elseif (in_array($row['verb'], ['', ACTIVITY_POST, ACTIVITY_SHARE])) {
 183                         // Posts don't have an object or target - but having tags or files.
 184                         // We safe some performance by building tag and file strings only here.
 185                         // We remove object and target since they aren't used for this type.
 186                         if (array_key_exists('object', $row)) {
 187                                 $row['object'] = '';
 188                         }
 189                         if (array_key_exists('target', $row)) {
 190                                 $row['target'] = '';
 191                         }
 192                         // Build the tag string out of the term entries
 193                         if (array_key_exists('tag', $row)) {
 194                                 $row['tag'] = Term::tagTextFromItemId($row['internal-iid']);
 195                         }
 196
 197                         // Build the file string out of the term entries
 198                         if (array_key_exists('file', $row)) {
 199                                 $row['file'] = Term::fileTextFromItemId($row['internal-iid']);
 200                         }
 201                 }
 202
 203                 // Remove internal fields
 204                 unset($row['internal-activity']);
 205                 unset($row['internal-network']);
 206                 unset($row['internal-iid']);
 207                 unset($row['internal-iaid']);
 208                 unset($row['internal-icid']);
 209
 210                 return $row;
 211         }
 212
 213         /**
 214          * @brief Fills an array with data from an item query
 215          *
 216          * @param object $stmt statement object
 217          * @return array Data array
 218          */
 219         public static function inArray($stmt, $do_close = true) {
 220                 if (is_bool($stmt)) {
 221                         return $stmt;
 222                 }
 223
 224                 $data = [];
 225                 while ($row = self::fetch($stmt)) {
 226                         $data[] = $row;
 227                 }
 228                 if ($do_close) {
 229                         dba::close($stmt);
 230                 }
 231                 return $data;
 232         }
 233
 234         /**
 235          * @brief Check if item data exists
 236          *
 237          * @param array $condition array of fields for condition
 238          *
 239          * @return boolean Are there rows for that condition?
 240          */
 241         public static function exists($condition) {
 242                 $stmt = self::select(['id'], $condition, ['limit' => 1]);
 243
 244                 if (is_bool($stmt)) {
 245                         $retval = $stmt;
 246                 } else {
 247                         $retval = (dba::num_rows($stmt) > 0);
 248                 }
 249
 250                 dba::close($stmt);
 251
 252                 return $retval;
 253         }
 254
 255         /**
 256          * Retrieve a single record from the item table for a given user and returns it in an associative array
 257          *
 258          * @brief Retrieve a single record from a table
 259          * @param integer $uid User ID
 260          * @param array  $fields
 261          * @param array  $condition
 262          * @param array  $params
 263          * @return bool|array
 264          * @see dba::select
 265          */
 266         public static function selectFirstForUser($uid, array $selected = [], array $condition = [], $params = [])
 267         {
 268                 $params['uid'] = $uid;
 269
 270                 if (empty($selected)) {
 271                         $selected = Item::DISPLAY_FIELDLIST;
 272                 }
 273
 274                 return self::selectFirst($selected, $condition, $params);
 275         }
 276
 277         /**
 278          * @brief Select rows from the item table for a given user
 279          *
 280          * @param integer $uid User ID
 281          * @param array  $selected  Array of selected fields, empty for all
 282          * @param array  $condition Array of fields for condition
 283          * @param array  $params    Array of several parameters
 284          *
 285          * @return boolean|object
 286          */
 287         public static function selectForUser($uid, array $selected = [], array $condition = [], $params = [])
 288         {
 289                 $params['uid'] = $uid;
 290
 291                 if (empty($selected)) {
 292                         $selected = Item::DISPLAY_FIELDLIST;
 293                 }
 294
 295                 return self::select($selected, $condition, $params);
 296         }
 297
 298         /**
 299          * Retrieve a single record from the item table and returns it in an associative array
 300          *
 301          * @brief Retrieve a single record from a table
 302          * @param array  $fields
 303          * @param array  $condition
 304          * @param array  $params
 305          * @return bool|array
 306          * @see dba::select
 307          */
 308         public static function selectFirst(array $fields = [], array $condition = [], $params = [])
 309         {
 310                 $params['limit'] = 1;
 311
 312                 $result = self::select($fields, $condition, $params);
 313
 314                 if (is_bool($result)) {
 315                         return $result;
 316                 } else {
 317                         $row = self::fetch($result);
 318                         dba::close($result);
 319                         return $row;
 320                 }
 321         }
 322
 323         /**
 324          * @brief Select rows from the item table
 325          *
 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          */
 332         public static function select(array $selected = [], array $condition = [], $params = [])
 333         {
 334                 $uid = 0;
 335                 $usermode = false;
 336
 337                 if (isset($params['uid'])) {
 338                         $uid = $params['uid'];
 339                         $usermode = true;
 340                 }
 341
 342                 $fields = self::fieldlist($selected);
 343
 344                 $select_fields = self::constructSelectFields($fields, $selected);
 345
 346                 $condition_string = dba::buildCondition($condition);
 347
 348                 $condition_string = self::addTablesToFields($condition_string, $fields);
 349
 350                 if ($usermode) {
 351                         $condition_string = $condition_string . ' AND ' . self::condition(false);
 352                 }
 353
 354                 $param_string = self::addTablesToFields(dba::buildParameter($params), $fields);
 355
 356                 $table = "`item` " . self::constructJoins($uid, $select_fields . $condition_string . $param_string, false, $usermode);
 357
 358                 $sql = "SELECT " . $select_fields . " FROM " . $table . $condition_string . $param_string;
 359
 360                 return dba::p($sql, $condition);
 361         }
 362
 363         /**
 364          * @brief Select rows from the starting post in the item table
 365          *
 366          * @param integer $uid User ID
 367          * @param array  $fields    Array of selected fields, empty for all
 368          * @param array  $condition Array of fields for condition
 369          * @param array  $params    Array of several parameters
 370          *
 371          * @return boolean|object
 372          */
 373         public static function selectThreadForUser($uid, array $selected = [], array $condition = [], $params = [])
 374         {
 375                 $params['uid'] = $uid;
 376
 377                 if (empty($selected)) {
 378                         $selected = Item::DISPLAY_FIELDLIST;
 379                 }
 380
 381                 return self::selectThread($selected, $condition, $params);
 382         }
 383
 384         /**
 385          * Retrieve a single record from the starting post in the item table and returns it in an associative array
 386          *
 387          * @brief Retrieve a single record from a table
 388          * @param integer $uid User ID
 389          * @param array  $selected
 390          * @param array  $condition
 391          * @param array  $params
 392          * @return bool|array
 393          * @see dba::select
 394          */
 395         public static function selectFirstThreadForUser($uid, array $selected = [], array $condition = [], $params = [])
 396         {
 397                 $params['uid'] = $uid;
 398
 399                 if (empty($selected)) {
 400                         $selected = Item::DISPLAY_FIELDLIST;
 401                 }
 402
 403                 return self::selectFirstThread($selected, $condition, $params);
 404         }
 405
 406         /**
 407          * Retrieve a single record from the starting post in the item table and returns it in an associative array
 408          *
 409          * @brief Retrieve a single record from a table
 410          * @param array  $fields
 411          * @param array  $condition
 412          * @param array  $params
 413          * @return bool|array
 414          * @see dba::select
 415          */
 416         public static function selectFirstThread(array $fields = [], array $condition = [], $params = [])
 417         {
 418                 $params['limit'] = 1;
 419                 $result = self::selectThread($fields, $condition, $params);
 420
 421                 if (is_bool($result)) {
 422                         return $result;
 423                 } else {
 424                         $row = self::fetch($result);
 425                         dba::close($result);
 426                         return $row;
 427                 }
 428         }
 429
 430         /**
 431          * @brief Select rows from the starting post in the item table
 432          *
 433          * @param array  $selected  Array of selected fields, empty for all
 434          * @param array  $condition Array of fields for condition
 435          * @param array  $params    Array of several parameters
 436          *
 437          * @return boolean|object
 438          */
 439         public static function selectThread(array $selected = [], array $condition = [], $params = [])
 440         {
 441                 $uid = 0;
 442                 $usermode = false;
 443
 444                 if (isset($params['uid'])) {
 445                         $uid = $params['uid'];
 446                         $usermode = true;
 447                 }
 448
 449                 $fields = self::fieldlist($selected);
 450
 451                 $threadfields = ['thread' => ['iid', 'uid', 'contact-id', 'owner-id', 'author-id',
 452                         'created', 'edited', 'commented', 'received', 'changed', 'wall', 'private',
 453                         'pubmail', 'moderated', 'visible', 'starred', 'ignored', 'bookmark',
 454                         'unseen', 'deleted', 'origin', 'forum_mode', 'mention', 'network']];
 455
 456                 $select_fields = self::constructSelectFields($fields, $selected);
 457
 458                 $condition_string = dba::buildCondition($condition);
 459
 460                 $condition_string = self::addTablesToFields($condition_string, $threadfields);
 461                 $condition_string = self::addTablesToFields($condition_string, $fields);
 462
 463                 if ($usermode) {
 464                         $condition_string = $condition_string . ' AND ' . self::condition(true);
 465                 }
 466
 467                 $param_string = dba::buildParameter($params);
 468                 $param_string = self::addTablesToFields($param_string, $threadfields);
 469                 $param_string = self::addTablesToFields($param_string, $fields);
 470
 471                 $table = "`thread` " . self::constructJoins($uid, $select_fields . $condition_string . $param_string, true, $usermode);
 472
 473                 $sql = "SELECT " . $select_fields . " FROM " . $table . $condition_string . $param_string;
 474
 475                 return dba::p($sql, $condition);
 476         }
 477
 478         /**
 479          * @brief Returns a list of fields that are associated with the item table
 480          *
 481          * @return array field list
 482          */
 483         private static function fieldlist($selected)
 484         {
 485                 $fields = [];
 486
 487                 $fields['item'] = ['id', 'uid', 'parent', 'uri', 'parent-uri', 'thr-parent', 'guid',
 488                         'contact-id', 'owner-id', 'author-id', 'type', 'wall', 'gravity', 'extid',
 489                         'created', 'edited', 'commented', 'received', 'changed', 'postopts',
 490                         'resource-id', 'event-id', 'tag', 'attach', 'inform',
 491                         'file', 'allow_cid', 'allow_gid', 'deny_cid', 'deny_gid',
 492                         'private', 'pubmail', 'moderated', 'visible', 'starred', 'bookmark',
 493                         'unseen', 'deleted', 'origin', 'forum_mode', 'mention', 'global',
 494                         'id' => 'item_id', 'network', 'icid', 'iaid', 'id' => 'internal-iid',
 495                         'network' => 'internal-network', 'icid' => 'internal-icid',
 496                         'iaid' => 'internal-iaid'];
 497
 498                 $fields['item-activity'] = ['activity' => 'internal-activity'];
 499
 500                 $fields['item-content'] = array_merge(self::CONTENT_FIELDLIST, self::MIXED_CONTENT_FIELDLIST);
 501
 502                 $fields['author'] = ['url' => 'author-link', 'name' => 'author-name',
 503                         'thumb' => 'author-avatar', 'nick' => 'author-nick', 'network' => 'author-network'];
 504
 505                 $fields['owner'] = ['url' => 'owner-link', 'name' => 'owner-name',
 506                         'thumb' => 'owner-avatar', 'nick' => 'owner-nick', 'network' => 'owner-network'];
 507
 508                 $fields['contact'] = ['url' => 'contact-link', 'name' => 'contact-name', 'thumb' => 'contact-avatar',
 509                         'writable', 'self', 'id' => 'cid', 'alias', 'uid' => 'contact-uid',
 510                         'photo', 'name-date', 'uri-date', 'avatar-date', 'thumb', 'dfrn-id'];
 511
 512                 $fields['parent-item'] = ['guid' => 'parent-guid', 'network' => 'parent-network'];
 513
 514                 $fields['parent-item-author'] = ['url' => 'parent-author-link', 'name' => 'parent-author-name'];
 515
 516                 $fields['event'] = ['created' => 'event-created', 'edited' => 'event-edited',
 517                         'start' => 'event-start','finish' => 'event-finish',
 518                         'summary' => 'event-summary','desc' => 'event-desc',
 519                         'location' => 'event-location', 'type' => 'event-type',
 520                         'nofinish' => 'event-nofinish','adjust' => 'event-adjust',
 521                         'ignore' => 'event-ignore', 'id' => 'event-id'];
 522
 523                 $fields['sign'] = ['signed_text', 'signature', 'signer'];
 524
 525                 return $fields;
 526         }
 527
 528         /**
 529          * @brief Returns SQL condition for the "select" functions
 530          *
 531          * @param boolean $thread_mode Called for the items (false) or for the threads (true)
 532          *
 533          * @return string SQL condition
 534          */
 535         private static function condition($thread_mode)
 536         {
 537                 if ($thread_mode) {
 538                         $master_table = "`thread`";
 539                 } else {
 540                         $master_table = "`item`";
 541                 }
 542                 return "$master_table.`visible` AND NOT $master_table.`deleted` AND NOT $master_table.`moderated` AND (`user-item`.`hidden` IS NULL OR NOT `user-item`.`hidden`) ";
 543         }
 544
 545         /**
 546          * @brief Returns all needed "JOIN" commands for the "select" functions
 547          *
 548          * @param integer $uid User ID
 549          * @param string $sql_commands The parts of the built SQL commands in the "select" functions
 550          * @param boolean $thread_mode Called for the items (false) or for the threads (true)
 551          *
 552          * @return string The SQL joins for the "select" functions
 553          */
 554         private static function constructJoins($uid, $sql_commands, $thread_mode, $user_mode)
 555         {
 556                 if ($thread_mode) {
 557                         $master_table = "`thread`";
 558                         $master_table_key = "`thread`.`iid`";
 559                         $joins = "STRAIGHT_JOIN `item` ON `item`.`id` = `thread`.`iid` ";
 560                 } else {
 561                         $master_table = "`item`";
 562                         $master_table_key = "`item`.`id`";
 563                         $joins = '';
 564                 }
 565
 566                 if ($user_mode) {
 567                         $joins .= sprintf("STRAIGHT_JOIN `contact` ON `contact`.`id` = $master_table.`contact-id`
 568                                 AND NOT `contact`.`blocked`
 569                                 AND ((NOT `contact`.`readonly` AND NOT `contact`.`pending` AND (`contact`.`rel` IN (%s, %s)))
 570                                 OR `contact`.`self` OR (`item`.`id` != `item`.`parent`) OR `contact`.`uid` = 0)
 571                                 STRAIGHT_JOIN `contact` AS `author` ON `author`.`id` = $master_table.`author-id` AND NOT `author`.`blocked`
 572                                 STRAIGHT_JOIN `contact` AS `owner` ON `owner`.`id` = $master_table.`owner-id` AND NOT `owner`.`blocked`
 573                                 LEFT JOIN `user-item` ON `user-item`.`iid` = $master_table_key AND `user-item`.`uid` = %d",
 574                                 CONTACT_IS_SHARING, CONTACT_IS_FRIEND, intval($uid));
 575                 } else {
 576                         if (strpos($sql_commands, "`contact`.") !== false) {
 577                                 $joins .= "STRAIGHT_JOIN `contact` ON `contact`.`id` = $master_table.`contact-id`";
 578                         }
 579                         if (strpos($sql_commands, "`author`.") !== false) {
 580                                 $joins .= " STRAIGHT_JOIN `contact` AS `author` ON `author`.`id` = $master_table.`author-id`";
 581                         }
 582                         if (strpos($sql_commands, "`owner`.") !== false) {
 583                                 $joins .= " STRAIGHT_JOIN `contact` AS `owner` ON `owner`.`id` = $master_table.`owner-id`";
 584                         }
 585                 }
 586
 587                 if (strpos($sql_commands, "`group_member`.") !== false) {
 588                         $joins .= " STRAIGHT_JOIN `group_member` ON `group_member`.`contact-id` = $master_table.`contact-id`";
 589                 }
 590
 591                 if (strpos($sql_commands, "`user`.") !== false) {
 592                         $joins .= " STRAIGHT_JOIN `user` ON `user`.`uid` = $master_table.`uid`";
 593                 }
 594
 595                 if (strpos($sql_commands, "`event`.") !== false) {
 596                         $joins .= " LEFT JOIN `event` ON `event-id` = `event`.`id`";
 597                 }
 598
 599                 if (strpos($sql_commands, "`sign`.") !== false) {
 600                         $joins .= " LEFT JOIN `sign` ON `sign`.`iid` = `item`.`id`";
 601                 }
 602
 603                 if (strpos($sql_commands, "`item-activity`.") !== false) {
 604                         $joins .= " LEFT JOIN `item-activity` ON `item-activity`.`id` = `item`.`iaid`";
 605                 }
 606
 607                 if (strpos($sql_commands, "`item-content`.") !== false) {
 608                         $joins .= " LEFT JOIN `item-content` ON `item-content`.`id` = `item`.`icid`";
 609                 }
 610
 611                 if ((strpos($sql_commands, "`parent-item`.") !== false) || (strpos($sql_commands, "`parent-author`.") !== false)) {
 612                         $joins .= " STRAIGHT_JOIN `item` AS `parent-item` ON `parent-item`.`id` = `item`.`parent`";
 613                 }
 614
 615                 if (strpos($sql_commands, "`parent-item-author`.") !== false) {
 616                         $joins .= " STRAIGHT_JOIN `contact` AS `parent-item-author` ON `parent-item-author`.`id` = `parent-item`.`author-id`";
 617                 }
 618
 619                 return $joins;
 620         }
 621
 622         /**
 623          * @brief Add the field list for the "select" functions
 624          *
 625          * @param array $fields The field definition array
 626          * @param array $selected The array with the selected fields from the "select" functions
 627          *
 628          * @return string The field list
 629          */
 630         private static function constructSelectFields($fields, $selected)
 631         {
 632                 if (!empty($selected)) {
 633                         $selected[] = 'internal-iid';
 634                         $selected[] = 'internal-iaid';
 635                         $selected[] = 'internal-icid';
 636                         $selected[] = 'internal-network';
 637                 }
 638
 639                 if (in_array('verb', $selected)) {
 640                         $selected[] = 'internal-activity';
 641                 }
 642
 643                 $selection = [];
 644                 foreach ($fields as $table => $table_fields) {
 645                         foreach ($table_fields as $field => $select) {
 646                                 if (empty($selected) || in_array($select, $selected)) {
 647                                         if (in_array($select, self::MIXED_CONTENT_FIELDLIST)) {
 648                                                 $selection[] = "`item`.`".$select."` AS `internal-item-" . $select . "`";
 649                                         }
 650                                         if (is_int($field)) {
 651                                                 $selection[] = "`" . $table . "`.`" . $select . "`";
 652                                         } else {
 653                                                 $selection[] = "`" . $table . "`.`" . $field . "` AS `" . $select . "`";
 654                                         }
 655                                 }
 656                         }
 657                 }
 658                 return implode(", ", $selection);
 659         }
 660
 661         /**
 662          * @brief add table definition to fields in an SQL query
 663          *
 664          * @param string $query SQL query
 665          * @param array $fields The field definition array
 666          *
 667          * @return string the changed SQL query
 668          */
 669         private static function addTablesToFields($query, $fields)
 670         {
 671                 foreach ($fields as $table => $table_fields) {
 672                         foreach ($table_fields as $alias => $field) {
 673                                 if (is_int($alias)) {
 674                                         $replace_field = $field;
 675                                 } else {
 676                                         $replace_field = $alias;
 677                                 }
 678
 679                                 $search = "/([^\.])`" . $field . "`/i";
 680                                 $replace = "$1`" . $table . "`.`" . $replace_field . "`";
 681                                 $query = preg_replace($search, $replace, $query);
 682                         }
 683                 }
 684                 return $query;
 685         }
 686
 687         /**
 688          * @brief Update existing item entries
 689          *
 690          * @param array $fields The fields that are to be changed
 691          * @param array $condition The condition for finding the item entries
 692          *
 693          * In the future we may have to change permissions as well.
 694          * Then we had to add the user id as third parameter.
 695          *
 696          * A return value of "0" doesn't mean an error - but that 0 rows had been changed.
 697          *
 698          * @return integer|boolean number of affected rows - or "false" if there was an error
 699          */
 700         public static function update(array $fields, array $condition)
 701         {
 702                 if (empty($condition) || empty($fields)) {
 703                         return false;
 704                 }
 705
 706                 // To ensure the data integrity we do it in an transaction
 707                 dba::transaction();
 708
 709                 // We cannot simply expand the condition to check for origin entries
 710                 // The condition needn't to be a simple array but could be a complex condition.
 711                 // And we have to execute this query before the update to ensure to fetch the same data.
 712                 $items = dba::select('item', ['id', 'origin', 'uri', 'plink', 'iaid', 'icid'], $condition);
 713
 714                 $content_fields = [];
 715                 foreach (array_merge(self::CONTENT_FIELDLIST, self::MIXED_CONTENT_FIELDLIST) as $field) {
 716                         if (isset($fields[$field])) {
 717                                 $content_fields[$field] = $fields[$field];
 718                                 unset($fields[$field]);
 719                         }
 720                 }
 721
 722                 if (array_key_exists('tag', $fields)) {
 723                         $tags = $fields['tag'];
 724                         unset($fields['tag']);
 725                 } else {
 726                         $tags = '';
 727                 }
 728
 729                 if (array_key_exists('file', $fields)) {
 730                         $files = $fields['file'];
 731                         unset($fields['file']);
 732                 } else {
 733                         $files = '';
 734                 }
 735
 736                 if (!empty($fields)) {
 737                         $success = dba::update('item', $fields, $condition);
 738
 739                         if (!$success) {
 740                                 dba::close($items);
 741                                 dba::rollback();
 742                                 return false;
 743                         }
 744                 }
 745
 746                 // When there is no content for the "old" item table, this will count the fetched items
 747                 $rows = dba::affected_rows();
 748
 749                 while ($item = dba::fetch($items)) {
 750                         if (!empty($item['plink'])) {
 751                                 $content_fields['plink'] = $item['plink'];
 752                         }
 753                         if (self::updateActivity($content_fields, ['uri' => $item['uri']])) {
 754                                 if (empty($item['iaid'])) {
 755                                         $item_activity = dba::selectFirst('item-activity', ['id'], ['uri' => $item['uri']]);
 756                                         if (DBM::is_result($item_activity)) {
 757                                                 $item_fields = ['iaid' => $item_activity['id'], 'icid' => 0,
 758                                                         'verb' => '', 'object' => '', 'body' => 'activity'];
 759                                                 dba::update('item', $item_fields, ['id' => $item['id']]);
 760
 761                                                 if (!empty($item['icid']) && !dba::exists('item', ['icid' => $item['icid']])) {
 762                                                         dba::delete('item-content', ['id' => $item['icid']]);
 763                                                 }
 764                                         }
 765                                 }
 766                         } else {
 767                                 self::updateContent($content_fields, ['uri' => $item['uri']]);
 768
 769                                 if (empty($item['icid'])) {
 770                                         $item_content = dba::selectFirst('item-content', [], ['uri' => $item['uri']]);
 771                                         if (DBM::is_result($item_content)) {
 772                                                 $item_fields = ['icid' => $item_content['id']];
 773                                                 // Clear all fields in the item table that have a content in the item-content table
 774                                                 foreach ($item_content as $field => $content) {
 775                                                         if (in_array($field, self::MIXED_CONTENT_FIELDLIST) && !empty($item_content[$field])) {
 776                                                                 $item_fields[$field] = '';
 777                                                         }
 778                                                 }
 779                                                 dba::update('item', $item_fields, ['id' => $item['id']]);
 780                                         }
 781                                 }
 782                         }
 783
 784                         if (!empty($tags)) {
 785                                 Term::insertFromTagFieldByItemId($item['id'], $tags);
 786                         }
 787
 788                         if (!empty($files)) {
 789                                 Term::insertFromFileFieldByItemId($item['id'], $files);
 790                         }
 791
 792                         self::updateThread($item['id']);
 793
 794                         // We only need to notfiy others when it is an original entry from us.
 795                         // Only call the notifier when the item has some content relevant change.
 796                         if ($item['origin'] && in_array('edited', array_keys($fields))) {
 797                                 Worker::add(PRIORITY_HIGH, "Notifier", 'edit_post', $item['id']);
 798                         }
 799                 }
 800
 801                 dba::close($items);
 802                 dba::commit();
 803                 return $rows;
 804         }
 805
 806         /**
 807          * @brief Delete an item and notify others about it - if it was ours
 808          *
 809          * @param array $condition The condition for finding the item entries
 810          * @param integer $priority Priority for the notification
 811          */
 812         public static function delete($condition, $priority = PRIORITY_HIGH)
 813         {
 814                 $items = dba::select('item', ['id'], $condition);
 815                 while ($item = dba::fetch($items)) {
 816                         self::deleteById($item['id'], $priority);
 817                 }
 818                 dba::close($items);
 819         }
 820
 821         /**
 822          * @brief Delete an item for an user and notify others about it - if it was ours
 823          *
 824          * @param array $condition The condition for finding the item entries
 825          * @param integer $uid User who wants to delete this item
 826          */
 827         public static function deleteForUser($condition, $uid)
 828         {
 829                 if ($uid == 0) {
 830                         return;
 831                 }
 832
 833                 $items = dba::select('item', ['id', 'uid'], $condition);
 834                 while ($item = dba::fetch($items)) {
 835                         // "Deleting" global items just means hiding them
 836                         if ($item['uid'] == 0) {
 837                                 dba::update('user-item', ['hidden' => true], ['iid' => $item['id'], 'uid' => $uid], true);
 838                         } elseif ($item['uid'] == $uid) {
 839                                 self::deleteById($item['id'], PRIORITY_HIGH);
 840                         } else {
 841                                 logger('Wrong ownership. Not deleting item ' . $item['id']);
 842                         }
 843                 }
 844                 dba::close($items);
 845         }
 846
 847         /**
 848          * @brief Delete an item and notify others about it - if it was ours
 849          *
 850          * @param integer $item_id Item ID that should be delete
 851          * @param integer $priority Priority for the notification
 852          *
 853          * @return boolean success
 854          */
 855         private static function deleteById($item_id, $priority = PRIORITY_HIGH)
 856         {
 857                 // locate item to be deleted
 858                 $fields = ['id', 'uri', 'uid', 'parent', 'parent-uri', 'origin',
 859                         'deleted', 'file', 'resource-id', 'event-id', 'attach',
 860                         'verb', 'object-type', 'object', 'target', 'contact-id'];
 861                 $item = self::selectFirst($fields, ['id' => $item_id]);
 862                 if (!DBM::is_result($item)) {
 863                         logger('Item with ID ' . $item_id . " hasn't been found.", LOGGER_DEBUG);
 864                         return false;
 865                 }
 866
 867                 if ($item['deleted']) {
 868                         logger('Item with ID ' . $item_id . ' has already been deleted.', LOGGER_DEBUG);
 869                         return false;
 870                 }
 871
 872                 $parent = self::selectFirst(['origin'], ['id' => $item['parent']]);
 873                 if (!DBM::is_result($parent)) {
 874                         $parent = ['origin' => false];
 875                 }
 876
 877                 // clean up categories and tags so they don't end up as orphans
 878
 879                 $matches = false;
 880                 $cnt = preg_match_all('/<(.*?)>/', $item['file'], $matches, PREG_SET_ORDER);
 881                 if ($cnt) {
 882                         foreach ($matches as $mtch) {
 883                                 file_tag_unsave_file($item['uid'], $item['id'], $mtch[1],true);
 884                         }
 885                 }
 886
 887                 $matches = false;
 888
 889                 $cnt = preg_match_all('/\[(.*?)\]/', $item['file'], $matches, PREG_SET_ORDER);
 890                 if ($cnt) {
 891                         foreach ($matches as $mtch) {
 892                                 file_tag_unsave_file($item['uid'], $item['id'], $mtch[1],false);
 893                         }
 894                 }
 895
 896                 /*
 897                  * If item is a link to a photo resource, nuke all the associated photos
 898                  * (visitors will not have photo resources)
 899                  * This only applies to photos uploaded from the photos page. Photos inserted into a post do not
 900                  * generate a resource-id and therefore aren't intimately linked to the item.
 901                  */
 902                 if (strlen($item['resource-id'])) {
 903                         dba::delete('photo', ['resource-id' => $item['resource-id'], 'uid' => $item['uid']]);
 904                 }
 905
 906                 // If item is a link to an event, delete the event.
 907                 if (intval($item['event-id'])) {
 908                         Event::delete($item['event-id']);
 909                 }
 910
 911                 // If item has attachments, drop them
 912                 foreach (explode(", ", $item['attach']) as $attach) {
 913                         preg_match("|attach/(\d+)|", $attach, $matches);
 914                         dba::delete('attach', ['id' => $matches[1], 'uid' => $item['uid']]);
 915                 }
 916
 917                 // Delete tags that had been attached to other items
 918                 self::deleteTagsFromItem($item);
 919
 920                 // Set the item to "deleted"
 921                 // This erasing of item content is superfluous for items with a matching item-content.
 922                 // But for the next time we will still have old content in the item table.
 923                 $item_fields = ['deleted' => true, 'edited' => DateTimeFormat::utcNow(), 'changed' => DateTimeFormat::utcNow(),
 924                         'body' => '', 'title' => '', 'content-warning' => '', 'rendered-hash' => '', 'rendered-html' => '',
 925                         'object' => '', 'target' => '', 'tag' => '', 'postopts' => '', 'attach' => '', 'file' => ''];
 926                 dba::update('item', $item_fields, ['id' => $item['id']]);
 927
 928                 Term::insertFromTagFieldByItemId($item['id'], '');
 929                 Term::insertFromFileFieldByItemId($item['id'], '');
 930                 self::deleteThread($item['id'], $item['parent-uri']);
 931
 932                 if (!self::exists(["`uri` = ? AND `uid` != 0 AND NOT `deleted`", $item['uri']])) {
 933                         self::delete(['uri' => $item['uri'], 'uid' => 0, 'deleted' => false], $priority);
 934                 }
 935
 936                 // If it's the parent of a comment thread, kill all the kids
 937                 if ($item['id'] == $item['parent']) {
 938                         self::delete(['parent' => $item['parent'], 'deleted' => false], $priority);
 939                 }
 940
 941                 // Is it our comment and/or our thread?
 942                 if ($item['origin'] || $parent['origin']) {
 943
 944                         // When we delete the original post we will delete all existing copies on the server as well
 945                         self::delete(['uri' => $item['uri'], 'deleted' => false], $priority);
 946
 947                         // send the notification upstream/downstream
 948                         Worker::add(['priority' => $priority, 'dont_fork' => true], "Notifier", "drop", intval($item['id']));
 949                 } elseif ($item['uid'] != 0) {
 950
 951                         // When we delete just our local user copy of an item, we have to set a marker to hide it
 952                         $global_item = self::selectFirst(['id'], ['uri' => $item['uri'], 'uid' => 0, 'deleted' => false]);
 953                         if (DBM::is_result($global_item)) {
 954                                 dba::update('user-item', ['hidden' => true], ['iid' => $global_item['id'], 'uid' => $item['uid']], true);
 955                         }
 956                 }
 957
 958                 logger('Item with ID ' . $item_id . " has been deleted.", LOGGER_DEBUG);
 959
 960                 return true;
 961         }
 962
 963         private static function deleteTagsFromItem($item)
 964         {
 965                 if (($item["verb"] != ACTIVITY_TAG) || ($item["object-type"] != ACTIVITY_OBJ_TAGTERM)) {
 966                         return;
 967                 }
 968
 969                 $xo = XML::parseString($item["object"], false);
 970                 $xt = XML::parseString($item["target"], false);
 971
 972                 if ($xt->type != ACTIVITY_OBJ_NOTE) {
 973                         return;
 974                 }
 975
 976                 $i = self::selectFirst(['id', 'contact-id', 'tag'], ['uri' => $xt->id, 'uid' => $item['uid']]);
 977                 if (!DBM::is_result($i)) {
 978                         return;
 979                 }
 980
 981                 // For tags, the owner cannot remove the tag on the author's copy of the post.
 982                 $owner_remove = ($item["contact-id"] == $i["contact-id"]);
 983                 $author_copy = $item["origin"];
 984
 985                 if (($owner_remove && $author_copy) || !$owner_remove) {
 986                         return;
 987                 }
 988
 989                 $tags = explode(',', $i["tag"]);
 990                 $newtags = [];
 991                 if (count($tags)) {
 992                         foreach ($tags as $tag) {
 993                                 if (trim($tag) !== trim($xo->body)) {
 994                                        $newtags[] = trim($tag);
 995                                 }
 996                         }
 997                 }
 998                 self::update(['tag' => implode(',', $newtags)], ['id' => $i["id"]]);
 999         }
1000
1001         private static function guid($item, $notify)
1002         {
1003                 $guid = notags(trim($item['guid']));
1004
1005                 if (!empty($guid)) {
1006                         return $guid;
1007                 }
1008
1009                 if ($notify) {
1010                         // We have to avoid duplicates. So we create the GUID in form of a hash of the plink or uri.
1011                         // We add the hash of our own host because our host is the original creator of the post.
1012                         $prefix_host = get_app()->get_hostname();
1013                 } else {
1014                         $prefix_host = '';
1015
1016                         // We are only storing the post so we create a GUID from the original hostname.
1017                         if (!empty($item['author-link'])) {
1018                                 $parsed = parse_url($item['author-link']);
1019                                 if (!empty($parsed['host'])) {
1020                                         $prefix_host = $parsed['host'];
1021                                 }
1022                         }
1023
1024                         if (empty($prefix_host) && !empty($item['plink'])) {
1025                                 $parsed = parse_url($item['plink']);
1026                                 if (!empty($parsed['host'])) {
1027                                         $prefix_host = $parsed['host'];
1028                                 }
1029                         }
1030
1031                         if (empty($prefix_host) && !empty($item['uri'])) {
1032                                 $parsed = parse_url($item['uri']);
1033                                 if (!empty($parsed['host'])) {
1034                                         $prefix_host = $parsed['host'];
1035                                 }
1036                         }
1037
1038                         // Is it in the format data@host.tld? - Used for mail contacts
1039                         if (empty($prefix_host) && !empty($item['author-link']) && strstr($item['author-link'], '@')) {
1040                                 $mailparts = explode('@', $item['author-link']);
1041                                 $prefix_host = array_pop($mailparts);
1042                         }
1043                 }
1044
1045                 if (!empty($item['plink'])) {
1046                         $guid = self::guidFromUri($item['plink'], $prefix_host);
1047                 } elseif (!empty($item['uri'])) {
1048                         $guid = self::guidFromUri($item['uri'], $prefix_host);
1049                 } else {
1050                         $guid = get_guid(32, hash('crc32', $prefix_host));
1051                 }
1052
1053                 return $guid;
1054         }
1055
1056         private static function contactId($item)
1057         {
1058                 $contact_id = (int)$item["contact-id"];
1059
1060                 if (!empty($contact_id)) {
1061                         return $contact_id;
1062                 }
1063                 logger('Missing contact-id. Called by: '.System::callstack(), LOGGER_DEBUG);
1064                 /*
1065                  * First we are looking for a suitable contact that matches with the author of the post
1066                  * This is done only for comments
1067                  */
1068                 if ($item['parent-uri'] != $item['uri']) {
1069                         $contact_id = Contact::getIdForURL($item['author-link'], $item['uid']);
1070                 }
1071
1072                 // If not present then maybe the owner was found
1073                 if ($contact_id == 0) {
1074                         $contact_id = Contact::getIdForURL($item['owner-link'], $item['uid']);
1075                 }
1076
1077                 // Still missing? Then use the "self" contact of the current user
1078                 if ($contact_id == 0) {
1079                         $self = dba::selectFirst('contact', ['id'], ['self' => true, 'uid' => $item['uid']]);
1080                         if (DBM::is_result($self)) {
1081                                 $contact_id = $self["id"];
1082                         }
1083                 }
1084                 logger("Contact-id was missing for post ".$item['guid']." from user id ".$item['uid']." - now set to ".$contact_id, LOGGER_DEBUG);
1085
1086                 return $contact_id;
1087         }
1088
1089         public static function insert($item, $force_parent = false, $notify = false, $dontcache = false)
1090         {
1091                 $a = get_app();
1092
1093                 // If it is a posting where users should get notifications, then define it as wall posting
1094                 if ($notify) {
1095                         $item['wall'] = 1;
1096                         $item['type'] = 'wall';
1097                         $item['origin'] = 1;
1098                         $item['network'] = NETWORK_DFRN;
1099                         $item['protocol'] = PROTOCOL_DFRN;
1100
1101                         if (is_int($notify)) {
1102                                 $priority = $notify;
1103                         } else {
1104                                 $priority = PRIORITY_HIGH;
1105                         }
1106                 } else {
1107                         $item['network'] = trim(defaults($item, 'network', NETWORK_PHANTOM));
1108                 }
1109
1110                 $item['guid'] = self::guid($item, $notify);
1111                 $item['uri'] = notags(trim(defaults($item, 'uri', self::newURI($item['uid'], $item['guid']))));
1112
1113                 // Store conversation data
1114                 $item = Conversation::insert($item);
1115
1116                 /*
1117                  * If a Diaspora signature structure was passed in, pull it out of the
1118                  * item array and set it aside for later storage.
1119                  */
1120
1121                 $dsprsig = null;
1122                 if (x($item, 'dsprsig')) {
1123                         $encoded_signature = $item['dsprsig'];
1124                         $dsprsig = json_decode(base64_decode($item['dsprsig']));
1125                         unset($item['dsprsig']);
1126                 }
1127
1128                 if (!empty($item['diaspora_signed_text'])) {
1129                         $diaspora_signed_text = $item['diaspora_signed_text'];
1130                         unset($item['diaspora_signed_text']);
1131                 } else {
1132                         $diaspora_signed_text = '';
1133                 }
1134
1135                 // Converting the plink
1136                 /// @TODO Check if this is really still needed
1137                 if ($item['network'] == NETWORK_OSTATUS) {
1138                         if (isset($item['plink'])) {
1139                                 $item['plink'] = OStatus::convertHref($item['plink']);
1140                         } elseif (isset($item['uri'])) {
1141                                 $item['plink'] = OStatus::convertHref($item['uri']);
1142                         }
1143                 }
1144
1145                 if (!empty($item['thr-parent'])) {
1146                         $item['parent-uri'] = $item['thr-parent'];
1147                 }
1148
1149                 $item['type'] = defaults($item, 'type', 'remote');
1150
1151                 if (isset($item['gravity'])) {
1152                         $item['gravity'] = intval($item['gravity']);
1153                 } elseif ($item['parent-uri'] === $item['uri']) {
1154                         $item['gravity'] = GRAVITY_PARENT;
1155                 } elseif (activity_match($item['verb'], ACTIVITY_POST)) {
1156                         $item['gravity'] = GRAVITY_COMMENT;
1157                 } elseif ($item['type'] == 'activity') {
1158                         $item['gravity'] = GRAVITY_ACTIVITY;
1159                 } else {
1160                         $item['gravity'] = GRAVITY_UNKNOWN;   // Should not happen
1161                         logger('Unknown gravity for verb: ' . $item['verb'] . ' - type: ' . $item['type'], LOGGER_DEBUG);
1162                 }
1163
1164                 $uid = intval($item['uid']);
1165
1166                 // check for create date and expire time
1167                 $expire_interval = Config::get('system', 'dbclean-expire-days', 0);
1168
1169                 $user = dba::selectFirst('user', ['expire'], ['uid' => $uid]);
1170                 if (DBM::is_result($user) && ($user['expire'] > 0) && (($user['expire'] < $expire_interval) || ($expire_interval == 0))) {
1171                         $expire_interval = $user['expire'];
1172                 }
1173
1174                 if (($expire_interval > 0) && !empty($item['created'])) {
1175                         $expire_date = time() - ($expire_interval * 86400);
1176                         $created_date = strtotime($item['created']);
1177                         if ($created_date < $expire_date) {
1178                                 logger('item-store: item created ('.date('c', $created_date).') before expiration time ('.date('c', $expire_date).'). ignored. ' . print_r($item,true), LOGGER_DEBUG);
1179                                 return 0;
1180                         }
1181                 }
1182
1183                 /*
1184                  * Do we already have this item?
1185                  * We have to check several networks since Friendica posts could be repeated
1186                  * via OStatus (maybe Diasporsa as well)
1187                  */
1188                 if (in_array($item['network'], [NETWORK_DIASPORA, NETWORK_DFRN, NETWORK_OSTATUS, ""])) {
1189                         $condition = ["`uri` = ? AND `uid` = ? AND `network` IN (?, ?, ?)",
1190                                 trim($item['uri']), $item['uid'],
1191                                 NETWORK_DIASPORA, NETWORK_DFRN, NETWORK_OSTATUS];
1192                         $existing = self::selectFirst(['id', 'network'], $condition);
1193                         if (DBM::is_result($existing)) {
1194                                 // We only log the entries with a different user id than 0. Otherwise we would have too many false positives
1195                                 if ($uid != 0) {
1196                                         logger("Item with uri ".$item['uri']." already existed for user ".$uid." with id ".$existing["id"]." target network ".$existing["network"]." - new network: ".$item['network']);
1197                                 }
1198
1199                                 return $existing["id"];
1200                         }
1201                 }
1202
1203                 self::addLanguageToItemArray($item);
1204
1205                 $item['wall']          = intval(defaults($item, 'wall', 0));
1206                 $item['extid']         = trim(defaults($item, 'extid', ''));
1207                 $item['author-name']   = trim(defaults($item, 'author-name', ''));
1208                 $item['author-link']   = trim(defaults($item, 'author-link', ''));
1209                 $item['author-avatar'] = trim(defaults($item, 'author-avatar', ''));
1210                 $item['owner-name']    = trim(defaults($item, 'owner-name', ''));
1211                 $item['owner-link']    = trim(defaults($item, 'owner-link', ''));
1212                 $item['owner-avatar']  = trim(defaults($item, 'owner-avatar', ''));
1213                 $item['received']      = ((x($item, 'received') !== false) ? DateTimeFormat::utc($item['received']) : DateTimeFormat::utcNow());
1214                 $item['created']       = ((x($item, 'created') !== false) ? DateTimeFormat::utc($item['created']) : $item['received']);
1215                 $item['edited']        = ((x($item, 'edited') !== false) ? DateTimeFormat::utc($item['edited']) : $item['created']);
1216                 $item['changed']       = ((x($item, 'changed') !== false) ? DateTimeFormat::utc($item['changed']) : $item['created']);
1217                 $item['commented']     = ((x($item, 'commented') !== false) ? DateTimeFormat::utc($item['commented']) : $item['created']);
1218                 $item['title']         = trim(defaults($item, 'title', ''));
1219                 $item['location']      = trim(defaults($item, 'location', ''));
1220                 $item['coord']         = trim(defaults($item, 'coord', ''));
1221                 $item['visible']       = ((x($item, 'visible') !== false) ? intval($item['visible'])         : 1);
1222                 $item['deleted']       = 0;
1223                 $item['parent-uri']    = trim(defaults($item, 'parent-uri', $item['uri']));
1224                 $item['verb']          = trim(defaults($item, 'verb', ''));
1225                 $item['object-type']   = trim(defaults($item, 'object-type', ''));
1226                 $item['object']        = trim(defaults($item, 'object', ''));
1227                 $item['target-type']   = trim(defaults($item, 'target-type', ''));
1228                 $item['target']        = trim(defaults($item, 'target', ''));
1229                 $item['plink']         = trim(defaults($item, 'plink', ''));
1230                 $item['allow_cid']     = trim(defaults($item, 'allow_cid', ''));
1231                 $item['allow_gid']     = trim(defaults($item, 'allow_gid', ''));
1232                 $item['deny_cid']      = trim(defaults($item, 'deny_cid', ''));
1233                 $item['deny_gid']      = trim(defaults($item, 'deny_gid', ''));
1234                 $item['private']       = intval(defaults($item, 'private', 0));
1235                 $item['bookmark']      = intval(defaults($item, 'bookmark', 0));
1236                 $item['body']          = trim(defaults($item, 'body', ''));
1237                 $item['tag']           = trim(defaults($item, 'tag', ''));
1238                 $item['attach']        = trim(defaults($item, 'attach', ''));
1239                 $item['app']           = trim(defaults($item, 'app', ''));
1240                 $item['origin']        = intval(defaults($item, 'origin', 0));
1241                 $item['postopts']      = trim(defaults($item, 'postopts', ''));
1242                 $item['resource-id']   = trim(defaults($item, 'resource-id', ''));
1243                 $item['event-id']      = intval(defaults($item, 'event-id', 0));
1244                 $item['inform']        = trim(defaults($item, 'inform', ''));
1245                 $item['file']          = trim(defaults($item, 'file', ''));
1246
1247                 // When there is no content then we don't post it
1248                 if ($item['body'].$item['title'] == '') {
1249                         logger('No body, no title.');
1250                         return 0;
1251                 }
1252
1253                 // Items cannot be stored before they happen ...
1254                 if ($item['created'] > DateTimeFormat::utcNow()) {
1255                         $item['created'] = DateTimeFormat::utcNow();
1256                 }
1257
1258                 // We haven't invented time travel by now.
1259                 if ($item['edited'] > DateTimeFormat::utcNow()) {
1260                         $item['edited'] = DateTimeFormat::utcNow();
1261                 }
1262
1263                 if (($item['author-link'] == "") && ($item['owner-link'] == "")) {
1264                         logger("Both author-link and owner-link are empty. Called by: " . System::callstack(), LOGGER_DEBUG);
1265                 }
1266
1267                 $item['plink'] = defaults($item, 'plink', System::baseUrl() . '/display/' . urlencode($item['guid']));
1268
1269                 // The contact-id should be set before "self::insert" was called - but there seems to be issues sometimes
1270                 $item["contact-id"] = self::contactId($item);
1271
1272                 $default = ['url' => $item['author-link'], 'name' => $item['author-name'],
1273                         'photo' => $item['author-avatar'], 'network' => $item['network']];
1274
1275                 $item['author-id'] = defaults($item, 'author-id', Contact::getIdForURL($item["author-link"], 0, false, $default));
1276
1277                 if (Contact::isBlocked($item["author-id"])) {
1278                         logger('Contact '.$item["author-id"].' is blocked, item '.$item["uri"].' will not be stored');
1279                         return 0;
1280                 }
1281
1282                 $default = ['url' => $item['owner-link'], 'name' => $item['owner-name'],
1283                         'photo' => $item['owner-avatar'], 'network' => $item['network']];
1284
1285                 $item['owner-id'] = defaults($item, 'owner-id', Contact::getIdForURL($item["owner-link"], 0, false, $default));
1286
1287                 if (Contact::isBlocked($item["owner-id"])) {
1288                         logger('Contact '.$item["owner-id"].' is blocked, item '.$item["uri"].' will not be stored');
1289                         return 0;
1290                 }
1291
1292                 // These fields aren't stored anymore in the item table, they are fetched upon request
1293                 unset($item['author-link']);
1294                 unset($item['author-name']);
1295                 unset($item['author-avatar']);
1296
1297                 unset($item['owner-link']);
1298                 unset($item['owner-name']);
1299                 unset($item['owner-avatar']);
1300
1301                 if ($item['network'] == NETWORK_PHANTOM) {
1302                         logger('Missing network. Called by: '.System::callstack(), LOGGER_DEBUG);
1303
1304                         $contact = Contact::getDetailsByURL($item['author-link'], $item['uid']);
1305                         if (!empty($contact['network'])) {
1306                                 $item['network'] = $contact["network"];
1307                         } else {
1308                                 $item['network'] = NETWORK_DFRN;
1309                         }
1310                         logger("Set network to " . $item["network"] . " for " . $item["uri"], LOGGER_DEBUG);
1311                 }
1312
1313                 // Checking if there is already an item with the same guid
1314                 logger('Checking for an item for user '.$item['uid'].' on network '.$item['network'].' with the guid '.$item['guid'], LOGGER_DEBUG);
1315                 $condition = ['guid' => $item['guid'], 'network' => $item['network'], 'uid' => $item['uid']];
1316                 if (self::exists($condition)) {
1317                         logger('found item with guid '.$item['guid'].' for user '.$item['uid'].' on network '.$item['network'], LOGGER_DEBUG);
1318                         return 0;
1319                 }
1320
1321                 // Check for hashtags in the body and repair or add hashtag links
1322                 self::setHashtags($item);
1323
1324                 $item['thr-parent'] = $item['parent-uri'];
1325
1326                 $notify_type = '';
1327                 $allow_cid = '';
1328                 $allow_gid = '';
1329                 $deny_cid  = '';
1330                 $deny_gid  = '';
1331
1332                 if ($item['parent-uri'] === $item['uri']) {
1333                         $parent_id = 0;
1334                         $parent_deleted = 0;
1335                         $allow_cid = $item['allow_cid'];
1336                         $allow_gid = $item['allow_gid'];
1337                         $deny_cid  = $item['deny_cid'];
1338                         $deny_gid  = $item['deny_gid'];
1339                         $notify_type = 'wall-new';
1340                 } else {
1341                         // find the parent and snarf the item id and ACLs
1342                         // and anything else we need to inherit
1343
1344                         $fields = ['uri', 'parent-uri', 'id', 'deleted',
1345                                 'allow_cid', 'allow_gid', 'deny_cid', 'deny_gid',
1346                                 'wall', 'private', 'forum_mode', 'origin'];
1347                         $condition = ['uri' => $item['parent-uri'], 'uid' => $item['uid']];
1348                         $params = ['order' => ['id' => false]];
1349                         $parent = self::selectFirst($fields, $condition, $params);
1350
1351                         if (DBM::is_result($parent)) {
1352                                 // is the new message multi-level threaded?
1353                                 // even though we don't support it now, preserve the info
1354                                 // and re-attach to the conversation parent.
1355
1356                                 if ($parent['uri'] != $parent['parent-uri']) {
1357                                         $item['parent-uri'] = $parent['parent-uri'];
1358
1359                                         $condition = ['uri' => $item['parent-uri'],
1360                                                 'parent-uri' => $item['parent-uri'],
1361                                                 'uid' => $item['uid']];
1362                                         $params = ['order' => ['id' => false]];
1363                                         $toplevel_parent = self::selectFirst($fields, $condition, $params);
1364
1365                                         if (DBM::is_result($toplevel_parent)) {
1366                                                 $parent = $toplevel_parent;
1367                                         }
1368                                 }
1369
1370                                 $parent_id      = $parent['id'];
1371                                 $parent_deleted = $parent['deleted'];
1372                                 $allow_cid      = $parent['allow_cid'];
1373                                 $allow_gid      = $parent['allow_gid'];
1374                                 $deny_cid       = $parent['deny_cid'];
1375                                 $deny_gid       = $parent['deny_gid'];
1376                                 $item['wall']    = $parent['wall'];
1377                                 $notify_type    = 'comment-new';
1378
1379                                 /*
1380                                  * If the parent is private, force privacy for the entire conversation
1381                                  * This differs from the above settings as it subtly allows comments from
1382                                  * email correspondents to be private even if the overall thread is not.
1383                                  */
1384                                 if ($parent['private']) {
1385                                         $item['private'] = $parent['private'];
1386                                 }
1387
1388                                 /*
1389                                  * Edge case. We host a public forum that was originally posted to privately.
1390                                  * The original author commented, but as this is a comment, the permissions
1391                                  * weren't fixed up so it will still show the comment as private unless we fix it here.
1392                                  */
1393                                 if ((intval($parent['forum_mode']) == 1) && $parent['private']) {
1394                                         $item['private'] = 0;
1395                                 }
1396
1397                                 // If its a post from myself then tag the thread as "mention"
1398                                 logger("Checking if parent ".$parent_id." has to be tagged as mention for user ".$item['uid'], LOGGER_DEBUG);
1399                                 $user = dba::selectFirst('user', ['nickname'], ['uid' => $item['uid']]);
1400                                 if (DBM::is_result($user)) {
1401                                         $self = normalise_link(System::baseUrl() . '/profile/' . $user['nickname']);
1402                                         $self_id = Contact::getIdForURL($self, 0, true);
1403                                         logger("'myself' is ".$self_id." for parent ".$parent_id." checking against ".$item['author-id']." and ".$item['owner-id'], LOGGER_DEBUG);
1404                                         if (($item['author-id'] == $self_id) || ($item['owner-id'] == $self_id)) {
1405                                                 dba::update('thread', ['mention' => true], ['iid' => $parent_id]);
1406                                                 logger("tagged thread ".$parent_id." as mention for user ".$self, LOGGER_DEBUG);
1407                                         }
1408                                 }
1409                         } else {
1410                                 /*
1411                                  * Allow one to see reply tweets from status.net even when
1412                                  * we don't have or can't see the original post.
1413                                  */
1414                                 if ($force_parent) {
1415                                         logger('$force_parent=true, reply converted to top-level post.');
1416                                         $parent_id = 0;
1417                                         $item['parent-uri'] = $item['uri'];
1418                                         $item['gravity'] = GRAVITY_PARENT;
1419                                 } else {
1420                                         logger('item parent '.$item['parent-uri'].' for '.$item['uid'].' was not found - ignoring item');
1421                                         return 0;
1422                                 }
1423
1424                                 $parent_deleted = 0;
1425                         }
1426                 }
1427
1428                 $condition = ["`uri` = ? AND `network` IN (?, ?) AND `uid` = ?",
1429                         $item['uri'], $item['network'], NETWORK_DFRN, $item['uid']];
1430                 if (self::exists($condition)) {
1431                         logger('duplicated item with the same uri found. '.print_r($item,true));
1432                         return 0;
1433                 }
1434
1435                 // On Friendica and Diaspora the GUID is unique
1436                 if (in_array($item['network'], [NETWORK_DFRN, NETWORK_DIASPORA])) {
1437                         $condition = ['guid' => $item['guid'], 'uid' => $item['uid']];
1438                         if (self::exists($condition)) {
1439                                 logger('duplicated item with the same guid found. '.print_r($item,true));
1440                                 return 0;
1441                         }
1442                 } else {
1443                         // Check for an existing post with the same content. There seems to be a problem with OStatus.
1444                         $condition = ["`body` = ? AND `network` = ? AND `created` = ? AND `contact-id` = ? AND `uid` = ?",
1445                                         $item['body'], $item['network'], $item['created'], $item['contact-id'], $item['uid']];
1446                         if (self::exists($condition)) {
1447                                 logger('duplicated item with the same body found. '.print_r($item,true));
1448                                 return 0;
1449                         }
1450                 }
1451
1452                 // Is this item available in the global items (with uid=0)?
1453                 if ($item["uid"] == 0) {
1454                         $item["global"] = true;
1455
1456                         // Set the global flag on all items if this was a global item entry
1457                         dba::update('item', ['global' => true], ['uri' => $item["uri"]]);
1458                 } else {
1459                         $item["global"] = self::exists(['uid' => 0, 'uri' => $item["uri"]]);
1460                 }
1461
1462                 // ACL settings
1463                 if (strlen($allow_cid) || strlen($allow_gid) || strlen($deny_cid) || strlen($deny_gid)) {
1464                         $private = 1;
1465                 } else {
1466                         $private = $item['private'];
1467                 }
1468
1469                 $item["allow_cid"] = $allow_cid;
1470                 $item["allow_gid"] = $allow_gid;
1471                 $item["deny_cid"] = $deny_cid;
1472                 $item["deny_gid"] = $deny_gid;
1473                 $item["private"] = $private;
1474                 $item["deleted"] = $parent_deleted;
1475
1476                 // Fill the cache field
1477                 put_item_in_cache($item);
1478
1479                 if ($notify) {
1480                         Addon::callHooks('post_local', $item);
1481                 } else {
1482                         Addon::callHooks('post_remote', $item);
1483                 }
1484
1485                 // This array field is used to trigger some automatic reactions
1486                 // It is mainly used in the "post_local" hook.
1487                 unset($item['api_source']);
1488
1489                 if (x($item, 'cancel')) {
1490                         logger('post cancelled by addon.');
1491                         return 0;
1492                 }
1493
1494                 /*
1495                  * Check for already added items.
1496                  * There is a timing issue here that sometimes creates double postings.
1497                  * An unique index would help - but the limitations of MySQL (maximum size of index values) prevent this.
1498                  */
1499                 if ($item["uid"] == 0) {
1500                         if (self::exists(['uri' => trim($item['uri']), 'uid' => 0])) {
1501                                 logger('Global item already stored. URI: '.$item['uri'].' on network '.$item['network'], LOGGER_DEBUG);
1502                                 return 0;
1503                         }
1504                 }
1505
1506                 logger('' . print_r($item,true), LOGGER_DATA);
1507
1508                 if (array_key_exists('tag', $item)) {
1509                         $tags = $item['tag'];
1510                         unset($item['tag']);
1511                 } else {
1512                         $tags = '';
1513                 }
1514
1515                 if (array_key_exists('file', $item)) {
1516                         $files = $item['file'];
1517                         unset($item['file']);
1518                 } else {
1519                         $files = '';
1520                 }
1521
1522                 // We are doing this outside of the transaction to avoid timing problems
1523                 if (!self::insertActivity($item)) {
1524                         self::insertContent($item);
1525                 }
1526
1527                 dba::transaction();
1528                 $ret = dba::insert('item', $item);
1529
1530                 // When the item was successfully stored we fetch the ID of the item.
1531                 if (DBM::is_result($ret)) {
1532                         $current_post = dba::lastInsertId();
1533                 } else {
1534                         // This can happen - for example - if there are locking timeouts.
1535                         dba::rollback();
1536
1537                         // Store the data into a spool file so that we can try again later.
1538
1539                         // At first we restore the Diaspora signature that we removed above.
1540                         if (isset($encoded_signature)) {
1541                                 $item['dsprsig'] = $encoded_signature;
1542                         }
1543
1544                         // Now we store the data in the spool directory
1545                         // We use "microtime" to keep the arrival order and "mt_rand" to avoid duplicates
1546                         $file = 'item-'.round(microtime(true) * 10000).'-'.mt_rand().'.msg';
1547
1548                         $spoolpath = get_spoolpath();
1549                         if ($spoolpath != "") {
1550                                 $spool = $spoolpath.'/'.$file;
1551                                 file_put_contents($spool, json_encode($item));
1552                                 logger("Item wasn't stored - Item was spooled into file ".$file, LOGGER_DEBUG);
1553                         }
1554                         return 0;
1555                 }
1556
1557                 if ($current_post == 0) {
1558                         // This is one of these error messages that never should occur.
1559                         logger("couldn't find created item - we better quit now.");
1560                         dba::rollback();
1561                         return 0;
1562                 }
1563
1564                 // How much entries have we created?
1565                 // We wouldn't need this query when we could use an unique index - but MySQL has length problems with them.
1566                 $entries = dba::count('item', ['uri' => $item['uri'], 'uid' => $item['uid'], 'network' => $item['network']]);
1567
1568                 if ($entries > 1) {
1569                         // There are duplicates. We delete our just created entry.
1570                         logger('Duplicated post occurred. uri = ' . $item['uri'] . ' uid = ' . $item['uid']);
1571
1572                         // Yes, we could do a rollback here - but we are having many users with MyISAM.
1573                         dba::delete('item', ['id' => $current_post]);
1574                         dba::commit();
1575                         return 0;
1576                 } elseif ($entries == 0) {
1577                         // This really should never happen since we quit earlier if there were problems.
1578                         logger("Something is terribly wrong. We haven't found our created entry.");
1579                         dba::rollback();
1580                         return 0;
1581                 }
1582
1583                 logger('created item '.$current_post);
1584                 self::updateContact($item);
1585
1586                 if (!$parent_id || ($item['parent-uri'] === $item['uri'])) {
1587                         $parent_id = $current_post;
1588                 }
1589
1590                 // Set parent id
1591                 dba::update('item', ['parent' => $parent_id], ['id' => $current_post]);
1592
1593                 $item['id'] = $current_post;
1594                 $item['parent'] = $parent_id;
1595
1596                 // update the commented timestamp on the parent
1597                 // Only update "commented" if it is really a comment
1598                 if (($item['gravity'] != GRAVITY_ACTIVITY) || !Config::get("system", "like_no_comment")) {
1599                         dba::update('item', ['commented' => DateTimeFormat::utcNow(), 'changed' => DateTimeFormat::utcNow()], ['id' => $parent_id]);
1600                 } else {
1601                         dba::update('item', ['changed' => DateTimeFormat::utcNow()], ['id' => $parent_id]);
1602                 }
1603
1604                 if ($dsprsig) {
1605                         /*
1606                          * Friendica servers lower than 3.4.3-2 had double encoded the signature ...
1607                          * We can check for this condition when we decode and encode the stuff again.
1608                          */
1609                         if (base64_encode(base64_decode(base64_decode($dsprsig->signature))) == base64_decode($dsprsig->signature)) {
1610                                 $dsprsig->signature = base64_decode($dsprsig->signature);
1611                                 logger("Repaired double encoded signature from handle ".$dsprsig->signer, LOGGER_DEBUG);
1612                         }
1613
1614                         dba::insert('sign', ['iid' => $current_post, 'signed_text' => $dsprsig->signed_text,
1615                                                 'signature' => $dsprsig->signature, 'signer' => $dsprsig->signer]);
1616                 }
1617
1618                 if (!empty($diaspora_signed_text)) {
1619                         // Formerly we stored the signed text, the signature and the author in different fields.
1620                         // We now store the raw data so that we are more flexible.
1621                         dba::insert('sign', ['iid' => $current_post, 'signed_text' => $diaspora_signed_text]);
1622                 }
1623
1624                 $deleted = self::tagDeliver($item['uid'], $current_post);
1625
1626                 /*
1627                  * current post can be deleted if is for a community page and no mention are
1628                  * in it.
1629                  */
1630                 if (!$deleted && !$dontcache) {
1631                         $posted_item = self::selectFirst(self::ITEM_FIELDLIST, ['id' => $current_post]);
1632                         if (DBM::is_result($posted_item)) {
1633                                 if ($notify) {
1634                                         Addon::callHooks('post_local_end', $posted_item);
1635                                 } else {
1636                                         Addon::callHooks('post_remote_end', $posted_item);
1637                                 }
1638                         } else {
1639                                 logger('new item not found in DB, id ' . $current_post);
1640                         }
1641                 }
1642
1643                 if ($item['parent-uri'] === $item['uri']) {
1644                         self::addThread($current_post);
1645                 } else {
1646                         self::updateThread($parent_id);
1647                 }
1648
1649                 dba::commit();
1650
1651                 /*
1652                  * Due to deadlock issues with the "term" table we are doing these steps after the commit.
1653                  * This is not perfect - but a workable solution until we found the reason for the problem.
1654                  */
1655                 if (!empty($tags)) {
1656                         Term::insertFromTagFieldByItemId($current_post, $tags);
1657                 }
1658
1659                 if (!empty($files)) {
1660                         Term::insertFromFileFieldByItemId($current_post, $files);
1661                 }
1662
1663                 if ($item['parent-uri'] === $item['uri']) {
1664                         self::addShadow($current_post);
1665                 } else {
1666                         self::addShadowPost($current_post);
1667                 }
1668
1669                 check_user_notification($current_post);
1670
1671                 if ($notify) {
1672                         Worker::add(['priority' => $priority, 'dont_fork' => true], "Notifier", $notify_type, $current_post);
1673                 } elseif (!empty($parent) && $parent['origin']) {
1674                         Worker::add(['priority' => PRIORITY_HIGH, 'dont_fork' => true], "Notifier", "comment-import", $current_post);
1675                 }
1676
1677                 return $current_post;
1678         }
1679
1680         /**
1681          * @brief Insert a new item content entry
1682          *
1683          * @param array $item The item fields that are to be inserted
1684          */
1685         private static function insertActivity(&$item)
1686         {
1687                 $activity_index = self::activityToIndex($item['verb']);
1688
1689                 if ($activity_index < 0) {
1690                         return false;
1691                 }
1692
1693                 $fields = ['uri' => $item['uri'], 'activity' => $activity_index,
1694                         'uri-hash' => hash('sha1', $item['uri']) . hash('ripemd160', $item['uri'])];
1695
1696                 $saved_item = $item;
1697
1698                 // We just remove everything that is content
1699                 foreach (array_merge(self::CONTENT_FIELDLIST, self::MIXED_CONTENT_FIELDLIST) as $field) {
1700                         unset($item[$field]);
1701                 }
1702
1703                 // To avoid timing problems, we are using locks.
1704                 $locked = Lock::set('item_insert_activity');
1705                 if (!$locked) {
1706                         logger("Couldn't acquire lock for URI " . $item['uri'] . " - proceeding anyway.");
1707                 }
1708
1709                 // Do we already have this content?
1710                 $item_activity = dba::selectFirst('item-activity', ['id'], ['uri' => $item['uri']]);
1711                 if (DBM::is_result($item_activity)) {
1712                         $item['iaid'] = $item_activity['id'];
1713                         logger('Fetched activity for URI ' . $item['uri'] . ' (' . $item['iaid'] . ')');
1714                 } elseif (dba::insert('item-activity', $fields)) {
1715                         $item['iaid'] = dba::lastInsertId();
1716                         logger('Inserted activity for URI ' . $item['uri'] . ' (' . $item['iaid'] . ')');
1717                 } else {
1718                         // This shouldn't happen. But if it does, we simply store it in the item-content table
1719                         logger('Could not insert activity for URI ' . $item['uri'] . ' - should not happen');
1720                         $item = $saved_item;
1721                         return false;
1722                 }
1723                 if ($locked) {
1724                         Lock::remove('item_insert_activity');
1725                 }
1726                 return true;
1727         }
1728
1729         /**
1730          * @brief Insert a new item content entry
1731          *
1732          * @param array $item The item fields that are to be inserted
1733          */
1734         private static function insertContent(&$item)
1735         {
1736                 $fields = ['uri' => $item['uri'], 'plink' => $item['plink'],
1737                         'uri-plink-hash' => hash('sha1', $item['plink']).hash('sha1', $item['uri'])];
1738
1739                 foreach (array_merge(self::CONTENT_FIELDLIST, self::MIXED_CONTENT_FIELDLIST) as $field) {
1740                         if (isset($item[$field])) {
1741                                 $fields[$field] = $item[$field];
1742                                 unset($item[$field]);
1743                         }
1744                 }
1745
1746                 // To avoid timing problems, we are using locks.
1747                 $locked = Lock::set('item_insert_content');
1748                 if (!$locked) {
1749                         logger("Couldn't acquire lock for URI " . $item['uri'] . " - proceeding anyway.");
1750                 }
1751
1752                 // Do we already have this content?
1753                 $item_content = dba::selectFirst('item-content', ['id'], ['uri' => $item['uri']]);
1754                 if (DBM::is_result($item_content)) {
1755                         $item['icid'] = $item_content['id'];
1756                         logger('Fetched content for URI ' . $item['uri'] . ' (' . $item['icid'] . ')');
1757                 } elseif (dba::insert('item-content', $fields)) {
1758                         $item['icid'] = dba::lastInsertId();
1759                         logger('Inserted content for URI ' . $item['uri'] . ' (' . $item['icid'] . ')');
1760                 } else {
1761                         // By setting the ICID value through the worker we should avoid timing problems.
1762                         // When the locking works, this shouldn't be needed. But better be prepared.
1763                         Worker::add(PRIORITY_HIGH, 'SetItemContentID', $item['uri']);
1764                         logger('Could not insert content for URI ' . $item['uri'] . ' - trying asynchronously');
1765                 }
1766                 if ($locked) {
1767                         Lock::remove('item_insert_content');
1768                 }
1769         }
1770
1771         /**
1772          * @brief Set the item content id for a given URI
1773          *
1774          * @param string $uri The item URI
1775          */
1776         public static function setICIDforURI($uri)
1777         {
1778                 $item_content = dba::selectFirst('item-content', ['id'], ['uri' => $uri]);
1779                 if (DBM::is_result($item_content)) {
1780                         dba::update('item', ['icid' => $item_content['id']], ['icid' => 0, 'uri' => $uri]);
1781                         logger('Asynchronously set item content id for URI ' . $uri . ' (' . $item_content['id'] . ') - Affected: '. (int)dba::affected_rows());
1782                 } else {
1783                         logger('No item-content found for URI ' . $uri);
1784                 }
1785         }
1786
1787         /**
1788          * @brief Update existing item content entries
1789          *
1790          * @param array $item The item fields that are to be changed
1791          * @param array $condition The condition for finding the item content entries
1792          */
1793         private static function updateActivity($item, $condition)
1794         {
1795                 if (empty($item['verb'])) {
1796                         return false;
1797                 }
1798
1799                 $activity_index = self::activityToIndex($item['verb']);
1800
1801                 if (!$activity_index) {
1802                         return false;
1803                 }
1804
1805                 $fields = ['activity' => $activity_index];
1806
1807                 logger('Update activity for URI ' . $condition['uri']);
1808
1809                 dba::update('item-activity', $fields, $condition, true);
1810
1811                 return true;
1812         }
1813
1814         /**
1815          * @brief Update existing item content entries
1816          *
1817          * @param array $item The item fields that are to be changed
1818          * @param array $condition The condition for finding the item content entries
1819          */
1820         private static function updateContent($item, $condition)
1821         {
1822                 // We have to select only the fields from the "item-content" table
1823                 $fields = [];
1824                 foreach (array_merge(self::CONTENT_FIELDLIST, self::MIXED_CONTENT_FIELDLIST) as $field) {
1825                         if (isset($item[$field])) {
1826                                 $fields[$field] = $item[$field];
1827                         }
1828                 }
1829
1830                 if (empty($fields)) {
1831                         return;
1832                 }
1833
1834                 if (!empty($item['plink'])) {
1835                         $fields['uri-plink-hash'] = hash('sha1', $item['plink']) . hash('sha1', $condition['uri']);
1836                 } else {
1837                         // Ensure that we don't delete the plink
1838                         unset($fields['plink']);
1839                 }
1840
1841                 logger('Update content for URI ' . $condition['uri']);
1842
1843                 dba::update('item-content', $fields, $condition, true);
1844         }
1845
1846         /**
1847          * @brief Distributes public items to the receivers
1848          *
1849          * @param integer $itemid      Item ID that should be added
1850          * @param string  $signed_text Original text (for Diaspora signatures), JSON encoded.
1851          */
1852         public static function distribute($itemid, $signed_text = '')
1853         {
1854                 $condition = ["`id` IN (SELECT `parent` FROM `item` WHERE `id` = ?)", $itemid];
1855                 $parent = self::selectFirst(['owner-id'], $condition);
1856                 if (!DBM::is_result($parent)) {
1857                         return;
1858                 }
1859
1860                 // Only distribute public items from native networks
1861                 $condition = ['id' => $itemid, 'uid' => 0,
1862                         'network' => [NETWORK_DFRN, NETWORK_DIASPORA, NETWORK_OSTATUS, ""],
1863                         'visible' => true, 'deleted' => false, 'moderated' => false, 'private' => false];
1864                 $item = self::selectFirst(self::ITEM_FIELDLIST, ['id' => $itemid]);
1865                 if (!DBM::is_result($item)) {
1866                         return;
1867                 }
1868
1869                 unset($item['id']);
1870                 unset($item['parent']);
1871                 unset($item['mention']);
1872                 unset($item['wall']);
1873                 unset($item['origin']);
1874                 unset($item['starred']);
1875
1876                 $users = [];
1877
1878                 $condition = ["`nurl` IN (SELECT `nurl` FROM `contact` WHERE `id` = ?) AND `uid` != 0 AND NOT `blocked` AND `rel` IN (?, ?)",
1879                         $parent['owner-id'], CONTACT_IS_SHARING,  CONTACT_IS_FRIEND];
1880                 $contacts = dba::select('contact', ['uid'], $condition);
1881                 while ($contact = dba::fetch($contacts)) {
1882                         $users[$contact['uid']] = $contact['uid'];
1883                 }
1884
1885                 $origin_uid = 0;
1886
1887                 if ($item['uri'] != $item['parent-uri']) {
1888                         $parents = self::select(['uid', 'origin'], ["`uri` = ? AND `uid` != 0", $item['parent-uri']]);
1889                         while ($parent = dba::fetch($parents)) {
1890                                 $users[$parent['uid']] = $parent['uid'];
1891                                 if ($parent['origin'] && !$item['origin']) {
1892                                         $origin_uid = $parent['uid'];
1893                                 }
1894                         }
1895                 }
1896
1897                 foreach ($users as $uid) {
1898                         if ($origin_uid == $uid) {
1899                                 $item['diaspora_signed_text'] = $signed_text;
1900                         }
1901                         self::storeForUser($itemid, $item, $uid);
1902                 }
1903         }
1904
1905         /**
1906          * @brief Store public items for the receivers
1907          *
1908          * @param integer $itemid Item ID that should be added
1909          * @param array   $item   The item entry that will be stored
1910          * @param integer $uid    The user that will receive the item entry
1911          */
1912         private static function storeForUser($itemid, $item, $uid)
1913         {
1914                 $item['uid'] = $uid;
1915                 $item['origin'] = 0;
1916                 $item['wall'] = 0;
1917                 if ($item['uri'] == $item['parent-uri']) {
1918                         $item['contact-id'] = Contact::getIdForURL($item['owner-link'], $uid);
1919                 } else {
1920                         $item['contact-id'] = Contact::getIdForURL($item['author-link'], $uid);
1921                 }
1922
1923                 if (empty($item['contact-id'])) {
1924                         $self = dba::selectFirst('contact', ['id'], ['self' => true, 'uid' => $uid]);
1925                         if (!DBM::is_result($self)) {
1926                                 return;
1927                         }
1928                         $item['contact-id'] = $self['id'];
1929                 }
1930
1931                 if (in_array($item['type'], ["net-comment", "wall-comment"])) {
1932                         $item['type'] = 'remote-comment';
1933                 } elseif ($item['type'] == 'wall') {
1934                         $item['type'] = 'remote';
1935                 }
1936
1937                 /// @todo Handling of "event-id"
1938
1939                 $notify = false;
1940                 if ($item['uri'] == $item['parent-uri']) {
1941                         $contact = dba::selectFirst('contact', [], ['id' => $item['contact-id'], 'self' => false]);
1942                         if (DBM::is_result($contact)) {
1943                                 $notify = self::isRemoteSelf($contact, $item);
1944                         }
1945                 }
1946
1947                 $distributed = self::insert($item, false, $notify, true);
1948
1949                 if (!$distributed) {
1950                         logger("Distributed public item " . $itemid . " for user " . $uid . " wasn't stored", LOGGER_DEBUG);
1951                 } else {
1952                         logger("Distributed public item " . $itemid . " for user " . $uid . " with id " . $distributed, LOGGER_DEBUG);
1953                 }
1954         }
1955
1956         /**
1957          * @brief Add a shadow entry for a given item id that is a thread starter
1958          *
1959          * We store every public item entry additionally with the user id "0".
1960          * This is used for the community page and for the search.
1961          * It is planned that in the future we will store public item entries only once.
1962          *
1963          * @param integer $itemid Item ID that should be added
1964          */
1965         public static function addShadow($itemid)
1966         {
1967                 $fields = ['uid', 'private', 'moderated', 'visible', 'deleted', 'network', 'uri'];
1968                 $condition = ['id' => $itemid, 'parent' => [0, $itemid]];
1969                 $item = self::selectFirst($fields, $condition);
1970
1971                 if (!DBM::is_result($item)) {
1972                         return;
1973                 }
1974
1975                 // is it already a copy?
1976                 if (($itemid == 0) || ($item['uid'] == 0)) {
1977                         return;
1978                 }
1979
1980                 // Is it a visible public post?
1981                 if (!$item["visible"] || $item["deleted"] || $item["moderated"] || $item["private"]) {
1982                         return;
1983                 }
1984
1985                 // is it an entry from a connector? Only add an entry for natively connected networks
1986                 if (!in_array($item["network"], [NETWORK_DFRN, NETWORK_DIASPORA, NETWORK_OSTATUS, ""])) {
1987                         return;
1988                 }
1989
1990                 if (self::exists(['uri' => $item['uri'], 'uid' => 0])) {
1991                         return;
1992                 }
1993
1994                 $item = self::selectFirst(self::ITEM_FIELDLIST, ['id' => $itemid]);
1995
1996                 if (DBM::is_result($item)) {
1997                         // Preparing public shadow (removing user specific data)
1998                         $item['uid'] = 0;
1999                         unset($item['id']);
2000                         unset($item['parent']);
2001                         unset($item['wall']);
2002                         unset($item['mention']);
2003                         unset($item['origin']);
2004                         unset($item['starred']);
2005                         if ($item['uri'] == $item['parent-uri']) {
2006                                 $item['contact-id'] = $item['owner-id'];
2007                         } else {
2008                                 $item['contact-id'] = $item['author-id'];
2009                         }
2010
2011                         if (in_array($item['type'], ["net-comment", "wall-comment"])) {
2012                                 $item['type'] = 'remote-comment';
2013                         } elseif ($item['type'] == 'wall') {
2014                                 $item['type'] = 'remote';
2015                         }
2016
2017                         $public_shadow = self::insert($item, false, false, true);
2018
2019                         logger("Stored public shadow for thread ".$itemid." under id ".$public_shadow, LOGGER_DEBUG);
2020                 }
2021         }
2022
2023         /**
2024          * @brief Add a shadow entry for a given item id that is a comment
2025          *
2026          * This function does the same like the function above - but for comments
2027          *
2028          * @param integer $itemid Item ID that should be added
2029          */
2030         public static function addShadowPost($itemid)
2031         {
2032                 $item = self::selectFirst(self::ITEM_FIELDLIST, ['id' => $itemid]);
2033                 if (!DBM::is_result($item)) {
2034                         return;
2035                 }
2036
2037                 // Is it a toplevel post?
2038                 if ($item['id'] == $item['parent']) {
2039                         self::addShadow($itemid);
2040                         return;
2041                 }
2042
2043                 // Is this a shadow entry?
2044                 if ($item['uid'] == 0) {
2045                         return;
2046                 }
2047
2048                 // Is there a shadow parent?
2049                 if (!self::exists(['uri' => $item['parent-uri'], 'uid' => 0])) {
2050                         return;
2051                 }
2052
2053                 // Is there already a shadow entry?
2054                 if (self::exists(['uri' => $item['uri'], 'uid' => 0])) {
2055                         return;
2056                 }
2057
2058                 // Save "origin" and "parent" state
2059                 $origin = $item['origin'];
2060                 $parent = $item['parent'];
2061
2062                 // Preparing public shadow (removing user specific data)
2063                 $item['uid'] = 0;
2064                 unset($item['id']);
2065                 unset($item['parent']);
2066                 unset($item['wall']);
2067                 unset($item['mention']);
2068                 unset($item['origin']);
2069                 unset($item['starred']);
2070                 $item['contact-id'] = Contact::getIdForURL($item['author-link']);
2071
2072                 if (in_array($item['type'], ["net-comment", "wall-comment"])) {
2073                         $item['type'] = 'remote-comment';
2074                 } elseif ($item['type'] == 'wall') {
2075                         $item['type'] = 'remote';
2076                 }
2077
2078                 $public_shadow = self::insert($item, false, false, true);
2079
2080                 logger("Stored public shadow for comment ".$item['uri']." under id ".$public_shadow, LOGGER_DEBUG);
2081
2082                 // If this was a comment to a Diaspora post we don't get our comment back.
2083                 // This means that we have to distribute the comment by ourselves.
2084                 if ($origin && self::exists(['id' => $parent, 'network' => NETWORK_DIASPORA])) {
2085                         self::distribute($public_shadow);
2086                 }
2087         }
2088
2089          /**
2090          * Adds a language specification in a "language" element of given $arr.
2091          * Expects "body" element to exist in $arr.
2092          */
2093         private static function addLanguageToItemArray(&$item)
2094         {
2095                 $naked_body = Text\BBCode::toPlaintext($item['body'], false);
2096
2097                 $ld = new Text_LanguageDetect();
2098                 $ld->setNameMode(2);
2099                 $languages = $ld->detect($naked_body, 3);
2100
2101                 if (is_array($languages)) {
2102                         $item['language'] = json_encode($languages);
2103                 }
2104         }
2105
2106         /**
2107          * @brief Creates an unique guid out of a given uri
2108          *
2109          * @param string $uri uri of an item entry
2110          * @param string $host hostname for the GUID prefix
2111          * @return string unique guid
2112          */
2113         public static function guidFromUri($uri, $host)
2114         {
2115                 // Our regular guid routine is using this kind of prefix as well
2116                 // We have to avoid that different routines could accidentally create the same value
2117                 $parsed = parse_url($uri);
2118
2119                 // We use a hash of the hostname as prefix for the guid
2120                 $guid_prefix = hash("crc32", $host);
2121
2122                 // Remove the scheme to make sure that "https" and "http" doesn't make a difference
2123                 unset($parsed["scheme"]);
2124
2125                 // Glue it together to be able to make a hash from it
2126                 $host_id = implode("/", $parsed);
2127
2128                 // We could use any hash algorithm since it isn't a security issue
2129                 $host_hash = hash("ripemd128", $host_id);
2130
2131                 return $guid_prefix.$host_hash;
2132         }
2133
2134         /**
2135          * generate an unique URI
2136          *
2137          * @param integer $uid User id
2138          * @param string $guid An existing GUID (Otherwise it will be generated)
2139          *
2140          * @return string
2141          */
2142         public static function newURI($uid, $guid = "")
2143         {
2144                 if ($guid == "") {
2145                         $guid = get_guid(32);
2146                 }
2147
2148                 $hostname = self::getApp()->get_hostname();
2149
2150                 $user = dba::selectFirst('user', ['nickname'], ['uid' => $uid]);
2151
2152                 $uri = "urn:X-dfrn:" . $hostname . ':' . $user['nickname'] . ':' . $guid;
2153
2154                 return $uri;
2155         }
2156
2157         /**
2158          * @brief Set "success_update" and "last-item" to the date of the last time we heard from this contact
2159          *
2160          * This can be used to filter for inactive contacts.
2161          * Only do this for public postings to avoid privacy problems, since poco data is public.
2162          * Don't set this value if it isn't from the owner (could be an author that we don't know)
2163          *
2164          * @param array $arr Contains the just posted item record
2165          */
2166         private static function updateContact($arr)
2167         {
2168                 // Unarchive the author
2169                 $contact = dba::selectFirst('contact', [], ['id' => $arr["author-id"]]);
2170                 if (DBM::is_result($contact)) {
2171                         Contact::unmarkForArchival($contact);
2172                 }
2173
2174                 // Unarchive the contact if it's not our own contact
2175                 $contact = dba::selectFirst('contact', [], ['id' => $arr["contact-id"], 'self' => false]);
2176                 if (DBM::is_result($contact)) {
2177                         Contact::unmarkForArchival($contact);
2178                 }
2179
2180                 $update = (!$arr['private'] && (($arr["author-link"] === $arr["owner-link"]) || ($arr["parent-uri"] === $arr["uri"])));
2181
2182                 // Is it a forum? Then we don't care about the rules from above
2183                 if (!$update && ($arr["network"] == NETWORK_DFRN) && ($arr["parent-uri"] === $arr["uri"])) {
2184                         if (dba::exists('contact', ['id' => $arr['contact-id'], 'forum' => true])) {
2185                                 $update = true;
2186                         }
2187                 }
2188
2189                 if ($update) {
2190                         dba::update('contact', ['success_update' => $arr['received'], 'last-item' => $arr['received']],
2191                                 ['id' => $arr['contact-id']]);
2192                 }
2193                 // Now do the same for the system wide contacts with uid=0
2194                 if (!$arr['private']) {
2195                         dba::update('contact', ['success_update' => $arr['received'], 'last-item' => $arr['received']],
2196                                 ['id' => $arr['owner-id']]);
2197
2198                         if ($arr['owner-id'] != $arr['author-id']) {
2199                                 dba::update('contact', ['success_update' => $arr['received'], 'last-item' => $arr['received']],
2200                                         ['id' => $arr['author-id']]);
2201                         }
2202                 }
2203         }
2204
2205         public static function setHashtags(&$item)
2206         {
2207
2208                 $tags = get_tags($item["body"]);
2209
2210                 // No hashtags?
2211                 if (!count($tags)) {
2212                         return false;
2213                 }
2214
2215                 // This sorting is important when there are hashtags that are part of other hashtags
2216                 // Otherwise there could be problems with hashtags like #test and #test2
2217                 rsort($tags);
2218
2219                 $URLSearchString = "^\[\]";
2220
2221                 // All hashtags should point to the home server if "local_tags" is activated
2222                 if (Config::get('system', 'local_tags')) {
2223                         $item["body"] = preg_replace("/#\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",
2224                                         "#[url=".System::baseUrl()."/search?tag=$2]$2[/url]", $item["body"]);
2225
2226                         $item["tag"] = preg_replace("/#\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",
2227                                         "#[url=".System::baseUrl()."/search?tag=$2]$2[/url]", $item["tag"]);
2228                 }
2229
2230                 // mask hashtags inside of url, bookmarks and attachments to avoid urls in urls
2231                 $item["body"] = preg_replace_callback("/\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",
2232                         function ($match) {
2233                                 return ("[url=" . str_replace("#", "&num;", $match[1]) . "]" . str_replace("#", "&num;", $match[2]) . "[/url]");
2234                         }, $item["body"]);
2235
2236                 $item["body"] = preg_replace_callback("/\[bookmark\=([$URLSearchString]*)\](.*?)\[\/bookmark\]/ism",
2237                         function ($match) {
2238                                 return ("[bookmark=" . str_replace("#", "&num;", $match[1]) . "]" . str_replace("#", "&num;", $match[2]) . "[/bookmark]");
2239                         }, $item["body"]);
2240
2241                 $item["body"] = preg_replace_callback("/\[attachment (.*)\](.*?)\[\/attachment\]/ism",
2242                         function ($match) {
2243                                 return ("[attachment " . str_replace("#", "&num;", $match[1]) . "]" . $match[2] . "[/attachment]");
2244                         }, $item["body"]);
2245
2246                 // Repair recursive urls
2247                 $item["body"] = preg_replace("/&num;\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",
2248                                 "&num;$2", $item["body"]);
2249
2250                 foreach ($tags as $tag) {
2251                         if ((strpos($tag, '#') !== 0) || strpos($tag, '[url=')) {
2252                                 continue;
2253                         }
2254
2255                         $basetag = str_replace('_',' ',substr($tag,1));
2256
2257                         $newtag = '#[url=' . System::baseUrl() . '/search?tag=' . rawurlencode($basetag) . ']' . $basetag . '[/url]';
2258
2259                         $item["body"] = str_replace($tag, $newtag, $item["body"]);
2260
2261                         if (!stristr($item["tag"], "/search?tag=" . $basetag . "]" . $basetag . "[/url]")) {
2262                                 if (strlen($item["tag"])) {
2263                                         $item["tag"] = ','.$item["tag"];
2264                                 }
2265                                 $item["tag"] = $newtag.$item["tag"];
2266                         }
2267                 }
2268
2269                 // Convert back the masked hashtags
2270                 $item["body"] = str_replace("&num;", "#", $item["body"]);
2271         }
2272
2273         public static function getGuidById($id)
2274         {
2275                 $item = self::selectFirst(['guid'], ['id' => $id]);
2276                 if (DBM::is_result($item)) {
2277                         return $item['guid'];
2278                 } else {
2279                         return '';
2280                 }
2281         }
2282
2283         public static function getIdAndNickByGuid($guid, $uid = 0)
2284         {
2285                 $nick = "";
2286                 $id = 0;
2287
2288                 if ($uid == 0) {
2289                         $uid == local_user();
2290                 }
2291
2292                 // Does the given user have this item?
2293                 if ($uid) {
2294                         $item = dba::fetch_first("SELECT `item`.`id`, `user`.`nickname` FROM `item`
2295                                 INNER JOIN `user` ON `user`.`uid` = `item`.`uid`
2296                                 WHERE `item`.`visible` AND NOT `item`.`deleted` AND NOT `item`.`moderated`
2297                                         AND `item`.`guid` = ? AND `item`.`uid` = ?", $guid, $uid);
2298                         if (DBM::is_result($item)) {
2299                                 $id = $item["id"];
2300                                 $nick = $item["nickname"];
2301                         }
2302                 }
2303
2304                 // Or is it anywhere on the server?
2305                 if ($nick == "") {
2306                         $item = dba::fetch_first("SELECT `item`.`id`, `user`.`nickname` FROM `item`
2307                                 INNER JOIN `user` ON `user`.`uid` = `item`.`uid`
2308                                 WHERE `item`.`visible` AND NOT `item`.`deleted` AND NOT `item`.`moderated`
2309                                         AND NOT `item`.`private` AND `item`.`wall`
2310                                         AND `item`.`guid` = ?", $guid);
2311                         if (DBM::is_result($item)) {
2312                                 $id = $item["id"];
2313                                 $nick = $item["nickname"];
2314                         }
2315                 }
2316                 return ["nick" => $nick, "id" => $id];
2317         }
2318
2319         /**
2320          * look for mention tags and setup a second delivery chain for forum/community posts if appropriate
2321          * @param int $uid
2322          * @param int $item_id
2323          * @return bool true if item was deleted, else false
2324          */
2325         private static function tagDeliver($uid, $item_id)
2326         {
2327                 $mention = false;
2328
2329                 $user = dba::selectFirst('user', [], ['uid' => $uid]);
2330                 if (!DBM::is_result($user)) {
2331                         return;
2332                 }
2333
2334                 $community_page = (($user['page-flags'] == PAGE_COMMUNITY) ? true : false);
2335                 $prvgroup = (($user['page-flags'] == PAGE_PRVGROUP) ? true : false);
2336
2337                 $item = self::selectFirst(self::ITEM_FIELDLIST, ['id' => $item_id]);
2338                 if (!DBM::is_result($item)) {
2339                         return;
2340                 }
2341
2342                 $link = normalise_link(System::baseUrl() . '/profile/' . $user['nickname']);
2343
2344                 /*
2345                  * Diaspora uses their own hardwired link URL in @-tags
2346                  * instead of the one we supply with webfinger
2347                  */
2348                 $dlink = normalise_link(System::baseUrl() . '/u/' . $user['nickname']);
2349
2350                 $cnt = preg_match_all('/[\@\!]\[url\=(.*?)\](.*?)\[\/url\]/ism', $item['body'], $matches, PREG_SET_ORDER);
2351                 if ($cnt) {
2352                         foreach ($matches as $mtch) {
2353                                 if (link_compare($link, $mtch[1]) || link_compare($dlink, $mtch[1])) {
2354                                         $mention = true;
2355                                         logger('mention found: ' . $mtch[2]);
2356                                 }
2357                         }
2358                 }
2359
2360                 if (!$mention) {
2361                         if (($community_page || $prvgroup) &&
2362                                   !$item['wall'] && !$item['origin'] && ($item['id'] == $item['parent'])) {
2363                                 // mmh.. no mention.. community page or private group... no wall.. no origin.. top-post (not a comment)
2364                                 // delete it!
2365                                 logger("no-mention top-level post to community or private group. delete.");
2366                                 dba::delete('item', ['id' => $item_id]);
2367                                 return true;
2368                         }
2369                         return;
2370                 }
2371
2372                 $arr = ['item' => $item, 'user' => $user];
2373
2374                 Addon::callHooks('tagged', $arr);
2375
2376                 if (!$community_page && !$prvgroup) {
2377                         return;
2378                 }
2379
2380                 /*
2381                  * tgroup delivery - setup a second delivery chain
2382                  * prevent delivery looping - only proceed
2383                  * if the message originated elsewhere and is a top-level post
2384                  */
2385                 if ($item['wall'] || $item['origin'] || ($item['id'] != $item['parent'])) {
2386                         return;
2387                 }
2388
2389                 // now change this copy of the post to a forum head message and deliver to all the tgroup members
2390                 $self = dba::selectFirst('contact', ['id', 'name', 'url', 'thumb'], ['uid' => $uid, 'self' => true]);
2391                 if (!DBM::is_result($self)) {
2392                         return;
2393                 }
2394
2395                 $owner_id = Contact::getIdForURL($self['url']);
2396
2397                 // also reset all the privacy bits to the forum default permissions
2398
2399                 $private = ($user['allow_cid'] || $user['allow_gid'] || $user['deny_cid'] || $user['deny_gid']) ? 1 : 0;
2400
2401                 $forum_mode = ($prvgroup ? 2 : 1);
2402
2403                 $fields = ['wall' => true, 'origin' => true, 'forum_mode' => $forum_mode, 'contact-id' => $self['id'],
2404                         'owner-id' => $owner_id, 'owner-link' => $self['url'], 'private' => $private, 'allow_cid' => $user['allow_cid'],
2405                         'allow_gid' => $user['allow_gid'], 'deny_cid' => $user['deny_cid'], 'deny_gid' => $user['deny_gid']];
2406                 dba::update('item', $fields, ['id' => $item_id]);
2407
2408                 self::updateThread($item_id);
2409
2410                 Worker::add(['priority' => PRIORITY_HIGH, 'dont_fork' => true], 'Notifier', 'tgroup', $item_id);
2411         }
2412
2413         public static function isRemoteSelf($contact, &$datarray)
2414         {
2415                 $a = get_app();
2416
2417                 if (!$contact['remote_self']) {
2418                         return false;
2419                 }
2420
2421                 // Prevent the forwarding of posts that are forwarded
2422                 if ($datarray["extid"] == NETWORK_DFRN) {
2423                         logger('Already forwarded', LOGGER_DEBUG);
2424                         return false;
2425                 }
2426
2427                 // Prevent to forward already forwarded posts
2428                 if ($datarray["app"] == $a->get_hostname()) {
2429                         logger('Already forwarded (second test)', LOGGER_DEBUG);
2430                         return false;
2431                 }
2432
2433                 // Only forward posts
2434                 if ($datarray["verb"] != ACTIVITY_POST) {
2435                         logger('No post', LOGGER_DEBUG);
2436                         return false;
2437                 }
2438
2439                 if (($contact['network'] != NETWORK_FEED) && $datarray['private']) {
2440                         logger('Not public', LOGGER_DEBUG);
2441                         return false;
2442                 }
2443
2444                 $datarray2 = $datarray;
2445                 logger('remote-self start - Contact '.$contact['url'].' - '.$contact['remote_self'].' Item '.print_r($datarray, true), LOGGER_DEBUG);
2446                 if ($contact['remote_self'] == 2) {
2447                         $self = dba::selectFirst('contact', ['id', 'name', 'url', 'thumb'],
2448                                         ['uid' => $contact['uid'], 'self' => true]);
2449                         if (DBM::is_result($self)) {
2450                                 $datarray['contact-id'] = $self["id"];
2451
2452                                 $datarray['owner-name'] = $self["name"];
2453                                 $datarray['owner-link'] = $self["url"];
2454                                 $datarray['owner-avatar'] = $self["thumb"];
2455
2456                                 $datarray['author-name']   = $datarray['owner-name'];
2457                                 $datarray['author-link']   = $datarray['owner-link'];
2458                                 $datarray['author-avatar'] = $datarray['owner-avatar'];
2459
2460                                 unset($datarray['created']);
2461                                 unset($datarray['edited']);
2462
2463                                 unset($datarray['network']);
2464                                 unset($datarray['owner-id']);
2465                                 unset($datarray['author-id']);
2466                         }
2467
2468                         if ($contact['network'] != NETWORK_FEED) {
2469                                 $datarray["guid"] = get_guid(32);
2470                                 unset($datarray["plink"]);
2471                                 $datarray["uri"] = self::newURI($contact['uid'], $datarray["guid"]);
2472                                 $datarray["parent-uri"] = $datarray["uri"];
2473                                 $datarray["thr-parent"] = $datarray["uri"];
2474                                 $datarray["extid"] = NETWORK_DFRN;
2475                                 $urlpart = parse_url($datarray2['author-link']);
2476                                 $datarray["app"] = $urlpart["host"];
2477                         } else {
2478                                 $datarray['private'] = 0;
2479                         }
2480                 }
2481
2482                 if ($contact['network'] != NETWORK_FEED) {
2483                         // Store the original post
2484                         $result = self::insert($datarray2, false, false);
2485                         logger('remote-self post original item - Contact '.$contact['url'].' return '.$result.' Item '.print_r($datarray2, true), LOGGER_DEBUG);
2486                 } else {
2487                         $datarray["app"] = "Feed";
2488                         $result = true;
2489                 }
2490
2491                 // Trigger automatic reactions for addons
2492                 $datarray['api_source'] = true;
2493
2494                 // We have to tell the hooks who we are - this really should be improved
2495                 $_SESSION["authenticated"] = true;
2496                 $_SESSION["uid"] = $contact['uid'];
2497
2498                 return $result;
2499         }
2500
2501         /**
2502          *
2503          * @param string $s
2504          * @param int    $uid
2505          * @param array  $item
2506          * @param int    $cid
2507          * @return string
2508          */
2509         public static function fixPrivatePhotos($s, $uid, $item = null, $cid = 0)
2510         {
2511                 if (Config::get('system', 'disable_embedded')) {
2512                         return $s;
2513                 }
2514
2515                 logger('check for photos', LOGGER_DEBUG);
2516                 $site = substr(System::baseUrl(), strpos(System::baseUrl(), '://'));
2517
2518                 $orig_body = $s;
2519                 $new_body = '';
2520
2521                 $img_start = strpos($orig_body, '[img');
2522                 $img_st_close = ($img_start !== false ? strpos(substr($orig_body, $img_start), ']') : false);
2523                 $img_len = ($img_start !== false ? strpos(substr($orig_body, $img_start + $img_st_close + 1), '[/img]') : false);
2524
2525                 while (($img_st_close !== false) && ($img_len !== false)) {
2526                         $img_st_close++; // make it point to AFTER the closing bracket
2527                         $image = substr($orig_body, $img_start + $img_st_close, $img_len);
2528
2529                         logger('found photo ' . $image, LOGGER_DEBUG);
2530
2531                         if (stristr($image, $site . '/photo/')) {
2532                                 // Only embed locally hosted photos
2533                                 $replace = false;
2534                                 $i = basename($image);
2535                                 $i = str_replace(['.jpg', '.png', '.gif'], ['', '', ''], $i);
2536                                 $x = strpos($i, '-');
2537
2538                                 if ($x) {
2539                                         $res = substr($i, $x + 1);
2540                                         $i = substr($i, 0, $x);
2541                                         $fields = ['data', 'type', 'allow_cid', 'allow_gid', 'deny_cid', 'deny_gid'];
2542                                         $photo = dba::selectFirst('photo', $fields, ['resource-id' => $i, 'scale' => $res, 'uid' => $uid]);
2543                                         if (DBM::is_result($photo)) {
2544                                                 /*
2545                                                  * Check to see if we should replace this photo link with an embedded image
2546                                                  * 1. No need to do so if the photo is public
2547                                                  * 2. If there's a contact-id provided, see if they're in the access list
2548                                                  *    for the photo. If so, embed it.
2549                                                  * 3. Otherwise, if we have an item, see if the item permissions match the photo
2550                                                  *    permissions, regardless of order but first check to see if they're an exact
2551                                                  *    match to save some processing overhead.
2552                                                  */
2553                                                 if (self::hasPermissions($photo)) {
2554                                                         if ($cid) {
2555                                                                 $recips = self::enumeratePermissions($photo);
2556                                                                 if (in_array($cid, $recips)) {
2557                                                                         $replace = true;
2558                                                                 }
2559                                                         } elseif ($item) {
2560                                                                 if (self::samePermissions($item, $photo)) {
2561                                                                         $replace = true;
2562                                                                 }
2563                                                         }
2564                                                 }
2565                                                 if ($replace) {
2566                                                         $data = $photo['data'];
2567                                                         $type = $photo['type'];
2568
2569                                                         // If a custom width and height were specified, apply before embedding
2570                                                         if (preg_match("/\[img\=([0-9]*)x([0-9]*)\]/is", substr($orig_body, $img_start, $img_st_close), $match)) {
2571                                                                 logger('scaling photo', LOGGER_DEBUG);
2572
2573                                                                 $width = intval($match[1]);
2574                                                                 $height = intval($match[2]);
2575
2576                                                                 $Image = new Image($data, $type);
2577                                                                 if ($Image->isValid()) {
2578                                                                         $Image->scaleDown(max($width, $height));
2579                                                                         $data = $Image->asString();
2580                                                                         $type = $Image->getType();
2581                                                                 }
2582                                                         }
2583
2584                                                         logger('replacing photo', LOGGER_DEBUG);
2585                                                         $image = 'data:' . $type . ';base64,' . base64_encode($data);
2586                                                         logger('replaced: ' . $image, LOGGER_DATA);
2587                                                 }
2588                                         }
2589                                 }
2590                         }
2591
2592                         $new_body = $new_body . substr($orig_body, 0, $img_start + $img_st_close) . $image . '[/img]';
2593                         $orig_body = substr($orig_body, $img_start + $img_st_close + $img_len + strlen('[/img]'));
2594                         if ($orig_body === false) {
2595                                 $orig_body = '';
2596                         }
2597
2598                         $img_start = strpos($orig_body, '[img');
2599                         $img_st_close = ($img_start !== false ? strpos(substr($orig_body, $img_start), ']') : false);
2600                         $img_len = ($img_start !== false ? strpos(substr($orig_body, $img_start + $img_st_close + 1), '[/img]') : false);
2601                 }
2602
2603                 $new_body = $new_body . $orig_body;
2604
2605                 return $new_body;
2606         }
2607
2608         private static function hasPermissions($obj)
2609         {
2610                 return !empty($obj['allow_cid']) || !empty($obj['allow_gid']) ||
2611                         !empty($obj['deny_cid']) || !empty($obj['deny_gid']);
2612         }
2613
2614         private static function samePermissions($obj1, $obj2)
2615         {
2616                 // first part is easy. Check that these are exactly the same.
2617                 if (($obj1['allow_cid'] == $obj2['allow_cid'])
2618                         && ($obj1['allow_gid'] == $obj2['allow_gid'])
2619                         && ($obj1['deny_cid'] == $obj2['deny_cid'])
2620                         && ($obj1['deny_gid'] == $obj2['deny_gid'])) {
2621                         return true;
2622                 }
2623
2624                 // This is harder. Parse all the permissions and compare the resulting set.
2625                 $recipients1 = self::enumeratePermissions($obj1);
2626                 $recipients2 = self::enumeratePermissions($obj2);
2627                 sort($recipients1);
2628                 sort($recipients2);
2629
2630                 /// @TODO Comparison of arrays, maybe use array_diff_assoc() here?
2631                 return ($recipients1 == $recipients2);
2632         }
2633
2634         // returns an array of contact-ids that are allowed to see this object
2635         private static function enumeratePermissions($obj)
2636         {
2637                 $allow_people = expand_acl($obj['allow_cid']);
2638                 $allow_groups = Group::expand(expand_acl($obj['allow_gid']));
2639                 $deny_people  = expand_acl($obj['deny_cid']);
2640                 $deny_groups  = Group::expand(expand_acl($obj['deny_gid']));
2641                 $recipients   = array_unique(array_merge($allow_people, $allow_groups));
2642                 $deny         = array_unique(array_merge($deny_people, $deny_groups));
2643                 $recipients   = array_diff($recipients, $deny);
2644                 return $recipients;
2645         }
2646
2647         public static function getFeedTags($item)
2648         {
2649                 $ret = [];
2650                 $matches = false;
2651                 $cnt = preg_match_all('|\#\[url\=(.*?)\](.*?)\[\/url\]|', $item['tag'], $matches);
2652                 if ($cnt) {
2653                         for ($x = 0; $x < $cnt; $x ++) {
2654                                 if ($matches[1][$x]) {
2655                                         $ret[$matches[2][$x]] = ['#', $matches[1][$x], $matches[2][$x]];
2656                                 }
2657                         }
2658                 }
2659                 $matches = false;
2660                 $cnt = preg_match_all('|\@\[url\=(.*?)\](.*?)\[\/url\]|', $item['tag'], $matches);
2661                 if ($cnt) {
2662                         for ($x = 0; $x < $cnt; $x ++) {
2663                                 if ($matches[1][$x]) {
2664                                         $ret[] = ['@', $matches[1][$x], $matches[2][$x]];
2665                                 }
2666                         }
2667                 }
2668                 return $ret;
2669         }
2670
2671         public static function expire($uid, $days, $network = "", $force = false)
2672         {
2673                 if (!$uid || ($days < 1)) {
2674                         return;
2675                 }
2676
2677                 $condition = ["`uid` = ? AND NOT `deleted` AND `id` = `parent` AND `gravity` = ?",
2678                         $uid, GRAVITY_PARENT];
2679
2680                 /*
2681                  * $expire_network_only = save your own wall posts
2682                  * and just expire conversations started by others
2683                  */
2684                 $expire_network_only = PConfig::get($uid, 'expire', 'network_only', false);
2685
2686                 if ($expire_network_only) {
2687                         $condition[0] .= " AND NOT `wall`";
2688                 }
2689
2690                 if ($network != "") {
2691                         $condition[0] .= " AND `network` = ?";
2692                         $condition[] = $network;
2693
2694                         /*
2695                          * There is an index "uid_network_received" but not "uid_network_created"
2696                          * This avoids the creation of another index just for one purpose.
2697                          * And it doesn't really matter wether to look at "received" or "created"
2698                          */
2699                         $condition[0] .= " AND `received` < UTC_TIMESTAMP() - INTERVAL ? DAY";
2700                         $condition[] = $days;
2701                 } else {
2702                         $condition[0] .= " AND `created` < UTC_TIMESTAMP() - INTERVAL ? DAY";
2703                         $condition[] = $days;
2704                 }
2705
2706                 $items = self::select(['file', 'resource-id', 'starred', 'type', 'id'], $condition);
2707
2708                 if (!DBM::is_result($items)) {
2709                         return;
2710                 }
2711
2712                 $expire_items = PConfig::get($uid, 'expire', 'items', true);
2713
2714                 // Forcing expiring of items - but not notes and marked items
2715                 if ($force) {
2716                         $expire_items = true;
2717                 }
2718
2719                 $expire_notes = PConfig::get($uid, 'expire', 'notes', true);
2720                 $expire_starred = PConfig::get($uid, 'expire', 'starred', true);
2721                 $expire_photos = PConfig::get($uid, 'expire', 'photos', false);
2722
2723                 $expired = 0;
2724
2725                 while ($item = Item::fetch($items)) {
2726                         // don't expire filed items
2727
2728                         if (strpos($item['file'], '[') !== false) {
2729                                 continue;
2730                         }
2731
2732                         // Only expire posts, not photos and photo comments
2733
2734                         if (!$expire_photos && strlen($item['resource-id'])) {
2735                                 continue;
2736                         } elseif (!$expire_starred && intval($item['starred'])) {
2737                                 continue;
2738                         } elseif (!$expire_notes && $item['type'] == 'note') {
2739                                 continue;
2740                         } elseif (!$expire_items && $item['type'] != 'note') {
2741                                 continue;
2742                         }
2743
2744                         self::deleteById($item['id'], PRIORITY_LOW);
2745
2746                         ++$expired;
2747                 }
2748                 dba::close($items);
2749                 logger('User ' . $uid . ": expired $expired items; expire items: $expire_items, expire notes: $expire_notes, expire starred: $expire_starred, expire photos: $expire_photos");
2750         }
2751
2752         public static function firstPostDate($uid, $wall = false)
2753         {
2754                 $condition = ['uid' => $uid, 'wall' => $wall, 'deleted' => false, 'visible' => true, 'moderated' => false];
2755                 $params = ['order' => ['created' => false]];
2756                 $thread = dba::selectFirst('thread', ['created'], $condition, $params);
2757                 if (DBM::is_result($thread)) {
2758                         return substr(DateTimeFormat::local($thread['created']), 0, 10);
2759                 }
2760                 return false;
2761         }
2762
2763         /**
2764          * @brief add/remove activity to an item
2765          *
2766          * Toggle activities as like,dislike,attend of an item
2767          *
2768          * @param string $item_id
2769          * @param string $verb
2770          *              Activity verb. One of
2771          *                      like, unlike, dislike, undislike, attendyes, unattendyes,
2772          *                      attendno, unattendno, attendmaybe, unattendmaybe
2773          * @hook 'post_local_end'
2774          *              array $arr
2775          *                      'post_id' => ID of posted item
2776          */
2777         public static function performLike($item_id, $verb)
2778         {
2779                 if (!local_user() && !remote_user()) {
2780                         return false;
2781                 }
2782
2783                 switch ($verb) {
2784                         case 'like':
2785                         case 'unlike':
2786                                 $bodyverb = L10n::t('%1$s likes %2$s\'s %3$s');
2787                                 $activity = ACTIVITY_LIKE;
2788                                 break;
2789                         case 'dislike':
2790                         case 'undislike':
2791                                 $bodyverb = L10n::t('%1$s doesn\'t like %2$s\'s %3$s');
2792                                 $activity = ACTIVITY_DISLIKE;
2793                                 break;
2794                         case 'attendyes':
2795                         case 'unattendyes':
2796                                 $bodyverb = L10n::t('%1$s is attending %2$s\'s %3$s');
2797                                 $activity = ACTIVITY_ATTEND;
2798                                 break;
2799                         case 'attendno':
2800                         case 'unattendno':
2801                                 $bodyverb = L10n::t('%1$s is not attending %2$s\'s %3$s');
2802                                 $activity = ACTIVITY_ATTENDNO;
2803                                 break;
2804                         case 'attendmaybe':
2805                         case 'unattendmaybe':
2806                                 $bodyverb = L10n::t('%1$s may attend %2$s\'s %3$s');
2807                                 $activity = ACTIVITY_ATTENDMAYBE;
2808                                 break;
2809                         default:
2810                                 logger('like: unknown verb ' . $verb . ' for item ' . $item_id);
2811                                 return false;
2812                 }
2813
2814                 // Enable activity toggling instead of on/off
2815                 $event_verb_flag = $activity === ACTIVITY_ATTEND || $activity === ACTIVITY_ATTENDNO || $activity === ACTIVITY_ATTENDMAYBE;
2816
2817                 logger('like: verb ' . $verb . ' item ' . $item_id);
2818
2819                 $item = self::selectFirst(self::ITEM_FIELDLIST, ['`id` = ? OR `uri` = ?', $item_id, $item_id]);
2820                 if (!DBM::is_result($item)) {
2821                         logger('like: unknown item ' . $item_id);
2822                         return false;
2823                 }
2824
2825                 $uid = $item['uid'];
2826                 if (($uid == 0) && local_user()) {
2827                         $uid = local_user();
2828                 }
2829
2830                 if (!can_write_wall($uid)) {
2831                         logger('like: unable to write on wall ' . $uid);
2832                         return false;
2833                 }
2834
2835                 // Retrieves the local post owner
2836                 $owner_self_contact = dba::selectFirst('contact', [], ['uid' => $uid, 'self' => true]);
2837                 if (!DBM::is_result($owner_self_contact)) {
2838                         logger('like: unknown owner ' . $uid);
2839                         return false;
2840                 }
2841
2842                 // Retrieve the current logged in user's public contact
2843                 $author_id = public_contact();
2844
2845                 $author_contact = dba::selectFirst('contact', [], ['id' => $author_id]);
2846                 if (!DBM::is_result($author_contact)) {
2847                         logger('like: unknown author ' . $author_id);
2848                         return false;
2849                 }
2850
2851                 // Contact-id is the uid-dependant author contact
2852                 if (local_user() == $uid) {
2853                         $item_contact_id = $owner_self_contact['id'];
2854                         $item_contact = $owner_self_contact;
2855                 } else {
2856                         $item_contact_id = Contact::getIdForURL($author_contact['url'], $uid, true);
2857                         $item_contact = dba::selectFirst('contact', [], ['id' => $item_contact_id]);
2858                         if (!DBM::is_result($item_contact)) {
2859                                 logger('like: unknown item contact ' . $item_contact_id);
2860                                 return false;
2861                         }
2862                 }
2863
2864                 // Look for an existing verb row
2865                 // event participation are essentially radio toggles. If you make a subsequent choice,
2866                 // we need to eradicate your first choice.
2867                 if ($event_verb_flag) {
2868                         $verbs = [ACTIVITY_ATTEND, ACTIVITY_ATTENDNO, ACTIVITY_ATTENDMAYBE];
2869                 } else {
2870                         $verbs = $activity;
2871                 }
2872
2873                 $base_condition = ['verb' => $verbs, 'deleted' => false, 'gravity' => GRAVITY_ACTIVITY,
2874                         'author-id' => $author_contact['id'], 'uid' => $item['uid']];
2875
2876                 $condition = array_merge($base_condition, ['parent' => $item_id]);
2877                 $like_item = self::selectFirst(['id', 'guid', 'verb'], $condition);
2878
2879                 if (!DBM::is_result($like_item)) {
2880                         $condition = array_merge($base_condition, ['parent-uri' => $item_id]);
2881                         $like_item = self::selectFirst(['id', 'guid', 'verb'], $condition);
2882                 }
2883
2884                 if (!DBM::is_result($like_item)) {
2885                         $condition = array_merge($base_condition, ['thr-parent' => $item_id]);
2886                         $like_item = self::selectFirst(['id', 'guid', 'verb'], $condition);
2887                 }
2888
2889                 // If it exists, mark it as deleted
2890                 if (DBM::is_result($like_item)) {
2891                         // Already voted, undo it
2892                         $fields = ['deleted' => true, 'unseen' => true, 'changed' => DateTimeFormat::utcNow()];
2893                         /// @todo Consider using self::update - but before doing so, check the side effects
2894                         dba::update('item', $fields, ['id' => $like_item['id']]);
2895
2896                         // Clean up the Diaspora signatures for this like
2897                         // Go ahead and do it even if Diaspora support is disabled. We still want to clean up
2898                         // if it had been enabled in the past
2899                         dba::delete('sign', ['iid' => $like_item['id']]);
2900
2901                         $like_item_id = $like_item['id'];
2902                         Worker::add(PRIORITY_HIGH, "Notifier", "like", $like_item_id);
2903
2904                         if (!$event_verb_flag || $like_item['verb'] == $activity) {
2905                                 return true;
2906                         }
2907                 }
2908
2909                 // Verb is "un-something", just trying to delete existing entries
2910                 if (strpos($verb, 'un') === 0) {
2911                         return true;
2912                 }
2913
2914                 // Else or if event verb different from existing row, create a new item row
2915                 $post_type = (($item['resource-id']) ? L10n::t('photo') : L10n::t('status'));
2916                 if ($item['object-type'] === ACTIVITY_OBJ_EVENT) {
2917                         $post_type = L10n::t('event');
2918                 }
2919                 $objtype = $item['resource-id'] ? ACTIVITY_OBJ_IMAGE : ACTIVITY_OBJ_NOTE ;
2920                 $link = xmlify('<link rel="alternate" type="text/html" href="' . System::baseUrl() . '/display/' . $owner_self_contact['nick'] . '/' . $item['id'] . '" />' . "\n") ;
2921                 $body = $item['body'];
2922
2923                 $obj = <<< EOT
2924
2925                 <object>
2926                         <type>$objtype</type>
2927                         <local>1</local>
2928                         <id>{$item['uri']}</id>
2929                         <link>$link</link>
2930                         <title></title>
2931                         <content>$body</content>
2932                 </object>
2933 EOT;
2934
2935                 $ulink = '[url=' . $author_contact['url'] . ']' . $author_contact['name'] . '[/url]';
2936                 $alink = '[url=' . $item['author-link'] . ']' . $item['author-name'] . '[/url]';
2937                 $plink = '[url=' . System::baseUrl() . '/display/' . $owner_self_contact['nick'] . '/' . $item['id'] . ']' . $post_type . '[/url]';
2938
2939                 $new_item = [
2940                         'guid'          => get_guid(32),
2941                         'uri'           => self::newURI($item['uid']),
2942                         'uid'           => $item['uid'],
2943                         'contact-id'    => $item_contact_id,
2944                         'type'          => 'activity',
2945                         'wall'          => $item['wall'],
2946                         'origin'        => 1,
2947                         'gravity'       => GRAVITY_ACTIVITY,
2948                         'parent'        => $item['id'],
2949                         'parent-uri'    => $item['uri'],
2950                         'thr-parent'    => $item['uri'],
2951                         'owner-id'      => $item['owner-id'],
2952                         'owner-name'    => $item['owner-name'],
2953                         'owner-link'    => $item['owner-link'],
2954                         'owner-avatar'  => $item['owner-avatar'],
2955                         'author-id'     => $author_contact['id'],
2956                         'author-name'   => $author_contact['name'],
2957                         'author-link'   => $author_contact['url'],
2958                         'author-avatar' => $author_contact['thumb'],
2959                         'body'          => sprintf($bodyverb, $ulink, $alink, $plink),
2960                         'verb'          => $activity,
2961                         'object-type'   => $objtype,
2962                         'object'        => $obj,
2963                         'allow_cid'     => $item['allow_cid'],
2964                         'allow_gid'     => $item['allow_gid'],
2965                         'deny_cid'      => $item['deny_cid'],
2966                         'deny_gid'      => $item['deny_gid'],
2967                         'visible'       => 1,
2968                         'unseen'        => 1,
2969                 ];
2970
2971                 $new_item_id = self::insert($new_item);
2972
2973                 // If the parent item isn't visible then set it to visible
2974                 if (!$item['visible']) {
2975                         self::update(['visible' => true], ['id' => $item['id']]);
2976                 }
2977
2978                 // Save the author information for the like in case we need to relay to Diaspora
2979                 Diaspora::storeLikeSignature($item_contact, $new_item_id);
2980
2981                 $new_item['id'] = $new_item_id;
2982
2983                 Addon::callHooks('post_local_end', $new_item);
2984
2985                 Worker::add(PRIORITY_HIGH, "Notifier", "like", $new_item_id);
2986
2987                 return true;
2988         }
2989
2990         private static function addThread($itemid, $onlyshadow = false)
2991         {
2992                 $fields = ['uid', 'created', 'edited', 'commented', 'received', 'changed', 'wall', 'private', 'pubmail',
2993                         'moderated', 'visible', 'starred', 'bookmark', 'contact-id',
2994                         'deleted', 'origin', 'forum_mode', 'mention', 'network', 'author-id', 'owner-id'];
2995                 $condition = ["`id` = ? AND (`parent` = ? OR `parent` = 0)", $itemid, $itemid];
2996                 $item = self::selectFirst($fields, $condition);
2997
2998                 if (!DBM::is_result($item)) {
2999                         return;
3000                 }
3001
3002                 $item['iid'] = $itemid;
3003
3004                 if (!$onlyshadow) {
3005                         $result = dba::insert('thread', $item);
3006
3007                         logger("Add thread for item ".$itemid." - ".print_r($result, true), LOGGER_DEBUG);
3008                 }
3009         }
3010
3011         private static function updateThread($itemid, $setmention = false)
3012         {
3013                 $fields = ['uid', 'guid', 'created', 'edited', 'commented', 'received', 'changed',
3014                         'wall', 'private', 'pubmail', 'moderated', 'visible', 'starred', 'bookmark', 'contact-id',
3015                         'deleted', 'origin', 'forum_mode', 'network', 'author-id', 'owner-id'];
3016                 $condition = ["`id` = ? AND (`parent` = ? OR `parent` = 0)", $itemid, $itemid];
3017
3018                 $item = self::selectFirst($fields, $condition);
3019                 if (!DBM::is_result($item)) {
3020                         return;
3021                 }
3022
3023                 if ($setmention) {
3024                         $item["mention"] = 1;
3025                 }
3026
3027                 $sql = "";
3028
3029                 $fields = [];
3030
3031                 foreach ($item as $field => $data) {
3032                         if (!in_array($field, ["guid"])) {
3033                                 $fields[$field] = $data;
3034                         }
3035                 }
3036
3037                 $result = dba::update('thread', $fields, ['iid' => $itemid]);
3038
3039                 logger("Update thread for item ".$itemid." - guid ".$item["guid"]." - ".(int)$result, LOGGER_DEBUG);
3040         }
3041
3042         private static function deleteThread($itemid, $itemuri = "")
3043         {
3044                 $item = dba::selectFirst('thread', ['uid'], ['iid' => $itemid]);
3045                 if (!DBM::is_result($item)) {
3046                         logger('No thread found for id '.$itemid, LOGGER_DEBUG);
3047                         return;
3048                 }
3049
3050                 // Using dba::delete at this time could delete the associated item entries
3051                 $result = dba::e("DELETE FROM `thread` WHERE `iid` = ?", $itemid);
3052
3053                 logger("deleteThread: Deleted thread for item ".$itemid." - ".print_r($result, true), LOGGER_DEBUG);
3054
3055                 if ($itemuri != "") {
3056                         $condition = ["`uri` = ? AND NOT `deleted` AND NOT (`uid` IN (?, 0))", $itemuri, $item["uid"]];
3057                         if (!self::exists($condition)) {
3058                                 dba::delete('item', ['uri' => $itemuri, 'uid' => 0]);
3059                                 logger("deleteThread: Deleted shadow for item ".$itemuri, LOGGER_DEBUG);
3060                         }
3061                 }
3062         }
3063 }