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