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 dba;
  28 use Text_LanguageDetect;
  29
  30 require_once 'boot.php';
  31 require_once 'include/items.php';
  32 require_once 'include/text.php';
  33
  34 class Item extends BaseObject
  35 {
  36         // Field list that is used to display the items
  37         const DISPLAY_FIELDLIST = ['uid', 'id', 'parent', 'uri', 'thr-parent', 'parent-uri', 'guid',
  38                         'commented', 'created', 'edited', 'received', 'verb', 'object-type', 'postopts', 'plink',
  39                         'wall', 'private', 'starred', 'origin', 'title', 'body', 'file', 'attach',
  40                         'content-warning', 'location', 'coord', 'app', 'rendered-hash', 'rendered-html', 'object',
  41                         'allow_cid', 'allow_gid', 'deny_cid', 'deny_gid', 'item_id',
  42                         'author-id', 'author-link', 'author-name', 'author-avatar', 'author-network',
  43                         'owner-id', 'owner-link', 'owner-name', 'owner-avatar',
  44                         'contact-id', 'contact-link', 'contact-name', 'contact-avatar',
  45                         'network', 'url', 'name', 'writable', 'self', 'cid', 'alias',
  46                         'event-id', 'event-created', 'event-edited', 'event-start', 'event-finish',
  47                         'event-summary', 'event-desc', 'event-location', 'event-type',
  48                         'event-nofinish', 'event-adjust', 'event-ignore', 'event-id'];
  49
  50         // Field list that is used to deliver items via the protocols
  51         const DELIVER_FIELDLIST = ['uid', 'id', 'parent', 'uri', 'thr-parent', 'parent-uri', 'guid',
  52                         'created', 'edited', 'verb', 'object-type', 'object', 'target',
  53                         'private', 'title', 'body', 'location', 'coord', 'app',
  54                         'attach', 'tag', 'bookmark', 'deleted', 'extid',
  55                         'allow_cid', 'allow_gid', 'deny_cid', 'deny_gid',
  56                         'author-id', 'author-link', 'owner-link', 'contact-uid',
  57                         'signed_text', 'signature', 'signer'];
  58
  59         /**
  60          * @brief Fetch a single item row
  61          *
  62          * @param mixed $stmt statement object
  63          * @return array current row
  64          */
  65         public static function fetch($stmt)
  66         {
  67                 $row = dba::fetch($stmt);
  68
  69                 return $row;
  70         }
  71
  72         /**
  73          * @brief Fills an array with data from an item query
  74          *
  75          * @param object $stmt statement object
  76          * @return array Data array
  77          */
  78         public static function inArray($stmt, $do_close = true) {
  79                 if (is_bool($stmt)) {
  80                         return $stmt;
  81                 }
  82
  83                 $data = [];
  84                 while ($row = self::fetch($stmt)) {
  85                         $data[] = $row;
  86                 }
  87                 if ($do_close) {
  88                         dba::close($stmt);
  89                 }
  90                 return $data;
  91         }
  92
  93         /**
  94          * Retrieve a single record from the item table for a given user and returns it in an associative array
  95          *
  96          * @brief Retrieve a single record from a table
  97          * @param integer $uid User ID
  98          * @param array  $fields
  99          * @param array  $condition
 100          * @param array  $params
 101          * @return bool|array
 102          * @see dba::select
 103          */
 104         public static function selectFirstForUser($uid, array $selected = [], array $condition = [], $params = [])
 105         {
 106                 $params['uid'] = $uid;
 107
 108                 if (empty($selected)) {
 109                         $selected = Item::DISPLAY_FIELDLIST;
 110                 }
 111
 112                 return self::selectFirst($selected, $condition, $params);
 113         }
 114
 115         /**
 116          * @brief Select rows from the item table for a given user
 117          *
 118          * @param integer $uid User ID
 119          * @param array  $selected  Array of selected fields, empty for all
 120          * @param array  $condition Array of fields for condition
 121          * @param array  $params    Array of several parameters
 122          *
 123          * @return boolean|object
 124          */
 125         public static function selectForUser($uid, array $selected = [], array $condition = [], $params = [])
 126         {
 127                 $params['uid'] = $uid;
 128
 129                 if (empty($selected)) {
 130                         $selected = Item::DISPLAY_FIELDLIST;
 131                 }
 132
 133                 return self::select($selected, $condition, $params);
 134         }
 135
 136         /**
 137          * Retrieve a single record from the item table and returns it in an associative array
 138          *
 139          * @brief Retrieve a single record from a table
 140          * @param array  $fields
 141          * @param array  $condition
 142          * @param array  $params
 143          * @return bool|array
 144          * @see dba::select
 145          */
 146         public static function selectFirst(array $fields = [], array $condition = [], $params = [])
 147         {
 148                 $params['limit'] = 1;
 149
 150                 $result = self::select($fields, $condition, $params);
 151
 152                 if (is_bool($result)) {
 153                         return $result;
 154                 } else {
 155                         $row = self::fetch($result);
 156                         dba::close($result);
 157                         return $row;
 158                 }
 159         }
 160
 161         /**
 162          * @brief Select rows from the item table
 163          *
 164          * @param array  $selected  Array of selected fields, empty for all
 165          * @param array  $condition Array of fields for condition
 166          * @param array  $params    Array of several parameters
 167          *
 168          * @return boolean|object
 169          */
 170         public static function select(array $selected = [], array $condition = [], $params = [])
 171         {
 172                 $uid = 0;
 173                 $usermode = false;
 174
 175                 if (isset($params['uid'])) {
 176                         $uid = $params['uid'];
 177                         $usermode = true;
 178                 }
 179
 180                 $fields = self::fieldlist($selected);
 181
 182                 $select_fields = self::constructSelectFields($fields, $selected);
 183
 184                 $condition_string = dba::buildCondition($condition);
 185
 186                 $condition_string = self::addTablesToFields($condition_string, $fields);
 187
 188                 if ($usermode) {
 189                         $condition_string = $condition_string . ' AND ' . self::condition(false);
 190                 }
 191
 192                 $param_string = self::addTablesToFields(dba::buildParameter($params), $fields);
 193
 194                 $table = "`item` " . self::constructJoins($uid, $select_fields . $condition_string . $param_string, false);
 195
 196                 $sql = "SELECT " . $select_fields . " FROM " . $table . $condition_string . $param_string;
 197
 198                 return dba::p($sql, $condition);
 199         }
 200
 201         /**
 202          * @brief Select rows from the starting post in the item table
 203          *
 204          * @param integer $uid User ID
 205          * @param array  $fields    Array of selected fields, empty for all
 206          * @param array  $condition Array of fields for condition
 207          * @param array  $params    Array of several parameters
 208          *
 209          * @return boolean|object
 210          */
 211         public static function selectThreadForUser($uid, array $selected = [], array $condition = [], $params = [])
 212         {
 213                 $params['uid'] = $uid;
 214
 215                 if (empty($selected)) {
 216                         $selected = Item::DISPLAY_FIELDLIST;
 217                 }
 218
 219                 return self::selectThread($selected, $condition, $params);
 220         }
 221
 222         /**
 223          * Retrieve a single record from the starting post in the item table and returns it in an associative array
 224          *
 225          * @brief Retrieve a single record from a table
 226          * @param integer $uid User ID
 227          * @param array  $selected
 228          * @param array  $condition
 229          * @param array  $params
 230          * @return bool|array
 231          * @see dba::select
 232          */
 233         public static function selectFirstThreadForUser($uid, array $selected = [], array $condition = [], $params = [])
 234         {
 235                 $params['uid'] = $uid;
 236
 237                 if (empty($selected)) {
 238                         $selected = Item::DISPLAY_FIELDLIST;
 239                 }
 240
 241                 return self::selectFirstThread($selected, $condition, $params);
 242         }
 243
 244         /**
 245          * Retrieve a single record from the starting post in the item table and returns it in an associative array
 246          *
 247          * @brief Retrieve a single record from a table
 248          * @param array  $fields
 249          * @param array  $condition
 250          * @param array  $params
 251          * @return bool|array
 252          * @see dba::select
 253          */
 254         public static function selectFirstThread(array $fields = [], array $condition = [], $params = [])
 255         {
 256                 $params['limit'] = 1;
 257                 $result = self::selectThread($fields, $condition, $params);
 258
 259                 if (is_bool($result)) {
 260                         return $result;
 261                 } else {
 262                         $row = self::fetch($result);
 263                         dba::close($result);
 264                         return $row;
 265                 }
 266         }
 267
 268         /**
 269          * @brief Select rows from the starting post in the item table
 270          *
 271          * @param array  $selected  Array of selected fields, empty for all
 272          * @param array  $condition Array of fields for condition
 273          * @param array  $params    Array of several parameters
 274          *
 275          * @return boolean|object
 276          */
 277         public static function selectThread(array $selected = [], array $condition = [], $params = [])
 278         {
 279                 $uid = 0;
 280                 $usermode = false;
 281
 282                 if (isset($params['uid'])) {
 283                         $uid = $params['uid'];
 284                         $usermode = true;
 285                 }
 286
 287                 $fields = self::fieldlist($selected);
 288
 289                 $threadfields = ['thread' => ['iid', 'uid', 'contact-id', 'owner-id', 'author-id',
 290                         'created', 'edited', 'commented', 'received', 'changed', 'wall', 'private',
 291                         'pubmail', 'moderated', 'visible', 'starred', 'ignored', 'bookmark',
 292                         'unseen', 'deleted', 'origin', 'forum_mode', 'mention', 'network']];
 293
 294                 $select_fields = self::constructSelectFields($fields, $selected);
 295
 296                 $condition_string = dba::buildCondition($condition);
 297
 298                 $condition_string = self::addTablesToFields($condition_string, $threadfields);
 299                 $condition_string = self::addTablesToFields($condition_string, $fields);
 300
 301                 if ($usermode) {
 302                         $condition_string = $condition_string . ' AND ' . self::condition(true);
 303                 }
 304
 305                 $param_string = dba::buildParameter($params);
 306                 $param_string = self::addTablesToFields($param_string, $threadfields);
 307                 $param_string = self::addTablesToFields($param_string, $fields);
 308
 309                 $table = "`thread` " . self::constructJoins($uid, $select_fields . $condition_string . $param_string, true);
 310
 311                 $sql = "SELECT " . $select_fields . " FROM " . $table . $condition_string . $param_string;
 312
 313                 return dba::p($sql, $condition);
 314         }
 315
 316         /**
 317          * @brief Returns a list of fields that are associated with the item table
 318          *
 319          * @return array field list
 320          */
 321         private static function fieldlist($selected)
 322         {
 323                 $fields = [];
 324
 325                 $fields['item'] = ['id', 'uid', 'parent', 'uri', 'parent-uri', 'thr-parent', 'guid',
 326                         'contact-id', 'owner-id', 'author-id', 'type', 'wall', 'gravity', 'extid',
 327                         'created', 'edited', 'commented', 'received', 'changed',
 328                         'title', 'body', 'app', 'verb', 'object-type', 'object', 'target-type', 'target',
 329                         'postopts', 'plink', 'resource-id', 'event-id', 'tag', 'attach', 'inform',
 330                         'file', 'location', 'coord', 'allow_cid', 'allow_gid', 'deny_cid', 'deny_gid',
 331                         'private', 'pubmail', 'moderated', 'visible', 'starred', 'bookmark',
 332                         'unseen', 'deleted', 'origin', 'forum_mode', 'mention',
 333                         'rendered-hash', 'rendered-html', 'global', 'content-warning',
 334                         'id' => 'item_id', 'network'];
 335
 336                 $fields['author'] = ['url' => 'author-link', 'name' => 'author-name',
 337                         'thumb' => 'author-avatar', 'nick' => 'author-nick', 'network' => 'author-network'];
 338
 339                 $fields['owner'] = ['url' => 'owner-link', 'name' => 'owner-name',
 340                         'thumb' => 'owner-avatar', 'nick' => 'owner-nick', 'network' => 'owner-network'];
 341
 342                 $fields['contact'] = ['url' => 'contact-link', 'name' => 'contact-name', 'thumb' => 'contact-avatar',
 343                         'url', 'name', 'writable', 'self', 'id' => 'cid', 'alias', 'uid' => 'contact-uid',
 344                         'photo', 'name-date', 'uri-date', 'avatar-date', 'thumb', 'dfrn-id', 'network' => 'contact-network'];
 345
 346                 $fields['parent-item'] = ['guid' => 'parent-guid', 'network' => 'parent-network'];
 347
 348                 $fields['parent-item-author'] = ['url' => 'parent-author-link', 'name' => 'parent-author-name'];
 349
 350                 $fields['event'] = ['created' => 'event-created', 'edited' => 'event-edited',
 351                         'start' => 'event-start','finish' => 'event-finish',
 352                         'summary' => 'event-summary','desc' => 'event-desc',
 353                         'location' => 'event-location', 'type' => 'event-type',
 354                         'nofinish' => 'event-nofinish','adjust' => 'event-adjust',
 355                         'ignore' => 'event-ignore', 'id' => 'event-id'];
 356
 357                 $fields['sign'] = ['signed_text', 'signature', 'signer'];
 358
 359                 return $fields;
 360         }
 361
 362         /**
 363          * @brief Returns SQL condition for the "select" functions
 364          *
 365          * @param boolean $thread_mode Called for the items (false) or for the threads (true)
 366          *
 367          * @return string SQL condition
 368          */
 369         private static function condition($thread_mode)
 370         {
 371                 if ($thread_mode) {
 372                         $master_table = "`thread`";
 373                 } else {
 374                         $master_table = "`item`";
 375                 }
 376                 return "$master_table.`visible` AND NOT $master_table.`deleted` AND NOT $master_table.`moderated` AND (`user-item`.`hidden` IS NULL OR NOT `user-item`.`hidden`) ";
 377         }
 378
 379         /**
 380          * @brief Returns all needed "JOIN" commands for the "select" functions
 381          *
 382          * @param integer $uid User ID
 383          * @param string $sql_commands The parts of the built SQL commands in the "select" functions
 384          * @param boolean $thread_mode Called for the items (false) or for the threads (true)
 385          *
 386          * @return string The SQL joins for the "select" functions
 387          */
 388         private static function constructJoins($uid, $sql_commands, $thread_mode)
 389         {
 390                 if ($thread_mode) {
 391                         $master_table = "`thread`";
 392                         $master_table_key = "`thread`.`iid`";
 393                         $joins = "STRAIGHT_JOIN `item` ON `item`.`id` = `thread`.`iid` ";
 394                 } else {
 395                         $master_table = "`item`";
 396                         $master_table_key = "`item`.`id`";
 397                         $joins = '';
 398                 }
 399
 400                 $joins .= sprintf("STRAIGHT_JOIN `contact` ON `contact`.`id` = $master_table.`contact-id`
 401                         AND NOT `contact`.`blocked`
 402                         AND ((NOT `contact`.`readonly` AND NOT `contact`.`pending` AND (`contact`.`rel` IN (%s, %s)))
 403                         OR `contact`.`self` OR (`item`.`id` != `item`.`parent`) OR `contact`.`uid` = 0)
 404                         STRAIGHT_JOIN `contact` AS `author` ON `author`.`id` = $master_table.`author-id` AND NOT `author`.`blocked`
 405                         STRAIGHT_JOIN `contact` AS `owner` ON `owner`.`id` = $master_table.`owner-id` AND NOT `owner`.`blocked`
 406                         LEFT JOIN `user-item` ON `user-item`.`iid` = $master_table_key AND `user-item`.`uid` = %d",
 407                         CONTACT_IS_SHARING, CONTACT_IS_FRIEND, intval($uid));
 408
 409                 if (strpos($sql_commands, "`group_member`.") !== false) {
 410                         $joins .= " STRAIGHT_JOIN `group_member` ON `group_member`.`contact-id` = $master_table.`contact-id`";
 411                 }
 412
 413                 if (strpos($sql_commands, "`user`.") !== false) {
 414                         $joins .= " STRAIGHT_JOIN `user` ON `user`.`uid` = $master_table.`uid`";
 415                 }
 416
 417                 if (strpos($sql_commands, "`event`.") !== false) {
 418                         $joins .= " LEFT JOIN `event` ON `event-id` = `event`.`id`";
 419                 }
 420
 421                 if (strpos($sql_commands, "`sign`.") !== false) {
 422                         $joins .= " LEFT JOIN `sign` ON `sign`.`iid` = `item`.`id`";
 423                 }
 424
 425                 if ((strpos($sql_commands, "`parent-item`.") !== false) || (strpos($sql_commands, "`parent-author`.") !== false)) {
 426                         $joins .= " STRAIGHT_JOIN `item` AS `parent-item` ON `parent-item`.`id` = `item`.`parent`";
 427                 }
 428
 429                 if (strpos($sql_commands, "`parent-item-author`.") !== false) {
 430                         $joins .= " STRAIGHT_JOIN `contact` AS `parent-item-author` ON `parent-item-author`.`id` = `parent-item`.`author-id`";
 431                 }
 432
 433                 return $joins;
 434         }
 435
 436         /**
 437          * @brief Add the field list for the "select" functions
 438          *
 439          * @param array $fields The field definition array
 440          * @param array $selected The array with the selected fields from the "select" functions
 441          *
 442          * @return string The field list
 443          */
 444         private static function constructSelectFields($fields, $selected)
 445         {
 446                 $selection = [];
 447                 foreach ($fields as $table => $table_fields) {
 448                         foreach ($table_fields as $field => $select) {
 449                                 if (empty($selected) || in_array($select, $selected)) {
 450                                         if (is_int($field)) {
 451                                                 $selection[] = "`" . $table . "`.`".$select."`";
 452                                         } else {
 453                                                 $selection[] = "`" . $table . "`.`" . $field . "` AS `".$select ."`";
 454                                         }
 455                                 }
 456                         }
 457                 }
 458                 return implode(", ", $selection);
 459         }
 460
 461         /**
 462          * @brief add table definition to fields in an SQL query
 463          *
 464          * @param string $query SQL query
 465          * @param array $fields The field definition array
 466          *
 467          * @return string the changed SQL query
 468          */
 469         private static function addTablesToFields($query, $fields)
 470         {
 471                 foreach ($fields as $table => $table_fields) {
 472                         foreach ($table_fields as $alias => $field) {
 473                                 if (is_int($alias)) {
 474                                         $replace_field = $field;
 475                                 } else {
 476                                         $replace_field = $alias;
 477                                 }
 478
 479                                 $search = "/([^\.])`" . $field . "`/i";
 480                                 $replace = "$1`" . $table . "`.`" . $replace_field . "`";
 481                                 $query = preg_replace($search, $replace, $query);
 482                         }
 483                 }
 484                 return $query;
 485         }
 486
 487         /**
 488          * @brief Update existing item entries
 489          *
 490          * @param array $fields The fields that are to be changed
 491          * @param array $condition The condition for finding the item entries
 492          *
 493          * In the future we may have to change permissions as well.
 494          * Then we had to add the user id as third parameter.
 495          *
 496          * A return value of "0" doesn't mean an error - but that 0 rows had been changed.
 497          *
 498          * @return integer|boolean number of affected rows - or "false" if there was an error
 499          */
 500         public static function update(array $fields, array $condition)
 501         {
 502                 if (empty($condition) || empty($fields)) {
 503                         return false;
 504                 }
 505
 506                 // To ensure the data integrity we do it in an transaction
 507                 dba::transaction();
 508
 509                 // We cannot simply expand the condition to check for origin entries
 510                 // The condition needn't to be a simple array but could be a complex condition.
 511                 // And we have to execute this query before the update to ensure to fetch the same data.
 512                 $items = dba::select('item', ['id', 'origin'], $condition);
 513
 514                 $success = dba::update('item', $fields, $condition);
 515
 516                 if (!$success) {
 517                         dba::close($items);
 518                         dba::rollback();
 519                         return false;
 520                 }
 521
 522                 $rows = dba::affected_rows();
 523
 524                 while ($item = dba::fetch($items)) {
 525                         Term::insertFromTagFieldByItemId($item['id']);
 526                         Term::insertFromFileFieldByItemId($item['id']);
 527                         self::updateThread($item['id']);
 528
 529                         // We only need to notfiy others when it is an original entry from us.
 530                         // Only call the notifier when the item has some content relevant change.
 531                         if ($item['origin'] && in_array('edited', array_keys($fields))) {
 532                                 Worker::add(PRIORITY_HIGH, "Notifier", 'edit_post', $item['id']);
 533                         }
 534                 }
 535
 536                 dba::close($items);
 537                 dba::commit();
 538                 return $rows;
 539         }
 540
 541         /**
 542          * @brief Delete an item and notify others about it - if it was ours
 543          *
 544          * @param array $condition The condition for finding the item entries
 545          * @param integer $priority Priority for the notification
 546          */
 547         public static function delete($condition, $priority = PRIORITY_HIGH)
 548         {
 549                 $items = dba::select('item', ['id'], $condition);
 550                 while ($item = dba::fetch($items)) {
 551                         self::deleteById($item['id'], $priority);
 552                 }
 553                 dba::close($items);
 554         }
 555
 556         /**
 557          * @brief Delete an item for an user and notify others about it - if it was ours
 558          *
 559          * @param array $condition The condition for finding the item entries
 560          * @param integer $uid User who wants to delete this item
 561          */
 562         public static function deleteForUser($condition, $uid)
 563         {
 564                 if ($uid == 0) {
 565                         return;
 566                 }
 567
 568                 $items = dba::select('item', ['id', 'uid'], $condition);
 569                 while ($item = dba::fetch($items)) {
 570                         // "Deleting" global items just means hiding them
 571                         if ($item['uid'] == 0) {
 572                                 dba::update('user-item', ['hidden' => true], ['iid' => $item['id'], 'uid' => $uid], true);
 573                         } elseif ($item['uid'] == $uid) {
 574                                 self::deleteById($item['id'], PRIORITY_HIGH);
 575                         } else {
 576                                 logger('Wrong ownership. Not deleting item ' . $item['id']);
 577                         }
 578                 }
 579                 dba::close($items);
 580         }
 581
 582         /**
 583          * @brief Delete an item and notify others about it - if it was ours
 584          *
 585          * @param integer $item_id Item ID that should be delete
 586          * @param integer $priority Priority for the notification
 587          *
 588          * @return boolean success
 589          */
 590         private static function deleteById($item_id, $priority = PRIORITY_HIGH)
 591         {
 592                 // locate item to be deleted
 593                 $fields = ['id', 'uri', 'uid', 'parent', 'parent-uri', 'origin',
 594                         'deleted', 'file', 'resource-id', 'event-id', 'attach',
 595                         'verb', 'object-type', 'object', 'target', 'contact-id'];
 596                 $item = dba::selectFirst('item', $fields, ['id' => $item_id]);
 597                 if (!DBM::is_result($item)) {
 598                         logger('Item with ID ' . $item_id . " hasn't been found.", LOGGER_DEBUG);
 599                         return false;
 600                 }
 601
 602                 if ($item['deleted']) {
 603                         logger('Item with ID ' . $item_id . ' has already been deleted.', LOGGER_DEBUG);
 604                         return false;
 605                 }
 606
 607                 $parent = dba::selectFirst('item', ['origin'], ['id' => $item['parent']]);
 608                 if (!DBM::is_result($parent)) {
 609                         $parent = ['origin' => false];
 610                 }
 611
 612                 // clean up categories and tags so they don't end up as orphans
 613
 614                 $matches = false;
 615                 $cnt = preg_match_all('/<(.*?)>/', $item['file'], $matches, PREG_SET_ORDER);
 616                 if ($cnt) {
 617                         foreach ($matches as $mtch) {
 618                                 file_tag_unsave_file($item['uid'], $item['id'], $mtch[1],true);
 619                         }
 620                 }
 621
 622                 $matches = false;
 623
 624                 $cnt = preg_match_all('/\[(.*?)\]/', $item['file'], $matches, PREG_SET_ORDER);
 625                 if ($cnt) {
 626                         foreach ($matches as $mtch) {
 627                                 file_tag_unsave_file($item['uid'], $item['id'], $mtch[1],false);
 628                         }
 629                 }
 630
 631                 /*
 632                  * If item is a link to a photo resource, nuke all the associated photos
 633                  * (visitors will not have photo resources)
 634                  * This only applies to photos uploaded from the photos page. Photos inserted into a post do not
 635                  * generate a resource-id and therefore aren't intimately linked to the item.
 636                  */
 637                 if (strlen($item['resource-id'])) {
 638                         dba::delete('photo', ['resource-id' => $item['resource-id'], 'uid' => $item['uid']]);
 639                 }
 640
 641                 // If item is a link to an event, delete the event.
 642                 if (intval($item['event-id'])) {
 643                         Event::delete($item['event-id']);
 644                 }
 645
 646                 // If item has attachments, drop them
 647                 foreach (explode(", ", $item['attach']) as $attach) {
 648                         preg_match("|attach/(\d+)|", $attach, $matches);
 649                         dba::delete('attach', ['id' => $matches[1], 'uid' => $item['uid']]);
 650                 }
 651
 652                 // Delete tags that had been attached to other items
 653                 self::deleteTagsFromItem($item);
 654
 655                 // Set the item to "deleted"
 656                 dba::update('item', ['deleted' => true, 'title' => '', 'body' => '',
 657                                         'edited' => DateTimeFormat::utcNow(), 'changed' => DateTimeFormat::utcNow()],
 658                                 ['id' => $item['id']]);
 659
 660                 Term::insertFromTagFieldByItemId($item['id']);
 661                 Term::insertFromFileFieldByItemId($item['id']);
 662                 self::deleteThread($item['id'], $item['parent-uri']);
 663
 664                 if (!dba::exists('item', ["`uri` = ? AND `uid` != 0 AND NOT `deleted`", $item['uri']])) {
 665                         self::delete(['uri' => $item['uri'], 'uid' => 0, 'deleted' => false], $priority);
 666                 }
 667
 668                 // If it's the parent of a comment thread, kill all the kids
 669                 if ($item['id'] == $item['parent']) {
 670                         self::delete(['parent' => $item['parent'], 'deleted' => false], $priority);
 671                 }
 672
 673                 // Is it our comment and/or our thread?
 674                 if ($item['origin'] || $parent['origin']) {
 675
 676                         // When we delete the original post we will delete all existing copies on the server as well
 677                         self::delete(['uri' => $item['uri'], 'deleted' => false], $priority);
 678
 679                         // send the notification upstream/downstream
 680                         Worker::add(['priority' => $priority, 'dont_fork' => true], "Notifier", "drop", intval($item['id']));
 681                 } elseif ($item['uid'] != 0) {
 682
 683                         // When we delete just our local user copy of an item, we have to set a marker to hide it
 684                         $global_item = dba::selectFirst('item', ['id'], ['uri' => $item['uri'], 'uid' => 0, 'deleted' => false]);
 685                         if (DBM::is_result($global_item)) {
 686                                 dba::update('user-item', ['hidden' => true], ['iid' => $global_item['id'], 'uid' => $item['uid']], true);
 687                         }
 688                 }
 689
 690                 logger('Item with ID ' . $item_id . " has been deleted.", LOGGER_DEBUG);
 691
 692                 return true;
 693         }
 694
 695         private static function deleteTagsFromItem($item)
 696         {
 697                 if (($item["verb"] != ACTIVITY_TAG) || ($item["object-type"] != ACTIVITY_OBJ_TAGTERM)) {
 698                         return;
 699                 }
 700
 701                 $xo = XML::parseString($item["object"], false);
 702                 $xt = XML::parseString($item["target"], false);
 703
 704                 if ($xt->type != ACTIVITY_OBJ_NOTE) {
 705                         return;
 706                 }
 707
 708                 $i = dba::selectFirst('item', ['id', 'contact-id', 'tag'], ['uri' => $xt->id, 'uid' => $item['uid']]);
 709                 if (!DBM::is_result($i)) {
 710                         return;
 711                 }
 712
 713                 // For tags, the owner cannot remove the tag on the author's copy of the post.
 714                 $owner_remove = ($item["contact-id"] == $i["contact-id"]);
 715                 $author_copy = $item["origin"];
 716
 717                 if (($owner_remove && $author_copy) || !$owner_remove) {
 718                         return;
 719                 }
 720
 721                 $tags = explode(',', $i["tag"]);
 722                 $newtags = [];
 723                 if (count($tags)) {
 724                         foreach ($tags as $tag) {
 725                                 if (trim($tag) !== trim($xo->body)) {
 726                                        $newtags[] = trim($tag);
 727                                 }
 728                         }
 729                 }
 730                 self::update(['tag' => implode(',', $newtags)], ['id' => $i["id"]]);
 731         }
 732
 733         private static function guid($item, $notify)
 734         {
 735                 $guid = notags(trim($item['guid']));
 736
 737                 if (!empty($guid)) {
 738                         return $guid;
 739                 }
 740
 741                 if ($notify) {
 742                         // We have to avoid duplicates. So we create the GUID in form of a hash of the plink or uri.
 743                         // We add the hash of our own host because our host is the original creator of the post.
 744                         $prefix_host = get_app()->get_hostname();
 745                 } else {
 746                         $prefix_host = '';
 747
 748                         // We are only storing the post so we create a GUID from the original hostname.
 749                         if (!empty($item['author-link'])) {
 750                                 $parsed = parse_url($item['author-link']);
 751                                 if (!empty($parsed['host'])) {
 752                                         $prefix_host = $parsed['host'];
 753                                 }
 754                         }
 755
 756                         if (empty($prefix_host) && !empty($item['plink'])) {
 757                                 $parsed = parse_url($item['plink']);
 758                                 if (!empty($parsed['host'])) {
 759                                         $prefix_host = $parsed['host'];
 760                                 }
 761                         }
 762
 763                         if (empty($prefix_host) && !empty($item['uri'])) {
 764                                 $parsed = parse_url($item['uri']);
 765                                 if (!empty($parsed['host'])) {
 766                                         $prefix_host = $parsed['host'];
 767                                 }
 768                         }
 769
 770                         // Is it in the format data@host.tld? - Used for mail contacts
 771                         if (empty($prefix_host) && !empty($item['author-link']) && strstr($item['author-link'], '@')) {
 772                                 $mailparts = explode('@', $item['author-link']);
 773                                 $prefix_host = array_pop($mailparts);
 774                         }
 775                 }
 776
 777                 if (!empty($item['plink'])) {
 778                         $guid = self::guidFromUri($item['plink'], $prefix_host);
 779                 } elseif (!empty($item['uri'])) {
 780                         $guid = self::guidFromUri($item['uri'], $prefix_host);
 781                 } else {
 782                         $guid = get_guid(32, hash('crc32', $prefix_host));
 783                 }
 784
 785                 return $guid;
 786         }
 787
 788         private static function contactId($item)
 789         {
 790                 $contact_id = (int)$item["contact-id"];
 791
 792                 if (!empty($contact_id)) {
 793                         return $contact_id;
 794                 }
 795                 logger('Missing contact-id. Called by: '.System::callstack(), LOGGER_DEBUG);
 796                 /*
 797                  * First we are looking for a suitable contact that matches with the author of the post
 798                  * This is done only for comments
 799                  */
 800                 if ($item['parent-uri'] != $item['uri']) {
 801                         $contact_id = Contact::getIdForURL($item['author-link'], $item['uid']);
 802                 }
 803
 804                 // If not present then maybe the owner was found
 805                 if ($contact_id == 0) {
 806                         $contact_id = Contact::getIdForURL($item['owner-link'], $item['uid']);
 807                 }
 808
 809                 // Still missing? Then use the "self" contact of the current user
 810                 if ($contact_id == 0) {
 811                         $self = dba::selectFirst('contact', ['id'], ['self' => true, 'uid' => $item['uid']]);
 812                         if (DBM::is_result($self)) {
 813                                 $contact_id = $self["id"];
 814                         }
 815                 }
 816                 logger("Contact-id was missing for post ".$item['guid']." from user id ".$item['uid']." - now set to ".$contact_id, LOGGER_DEBUG);
 817
 818                 return $contact_id;
 819         }
 820
 821         public static function insert($item, $force_parent = false, $notify = false, $dontcache = false)
 822         {
 823                 $a = get_app();
 824
 825                 // If it is a posting where users should get notifications, then define it as wall posting
 826                 if ($notify) {
 827                         $item['wall'] = 1;
 828                         $item['type'] = 'wall';
 829                         $item['origin'] = 1;
 830                         $item['network'] = NETWORK_DFRN;
 831                         $item['protocol'] = PROTOCOL_DFRN;
 832
 833                         if (is_int($notify)) {
 834                                 $priority = $notify;
 835                         } else {
 836                                 $priority = PRIORITY_HIGH;
 837                         }
 838                 } else {
 839                         $item['network'] = trim(defaults($item, 'network', NETWORK_PHANTOM));
 840                 }
 841
 842                 $item['guid'] = self::guid($item, $notify);
 843                 $item['uri'] = notags(trim(defaults($item, 'uri', self::newURI($item['uid'], $item['guid']))));
 844
 845                 // Store conversation data
 846                 $item = Conversation::insert($item);
 847
 848                 /*
 849                  * If a Diaspora signature structure was passed in, pull it out of the
 850                  * item array and set it aside for later storage.
 851                  */
 852
 853                 $dsprsig = null;
 854                 if (x($item, 'dsprsig')) {
 855                         $encoded_signature = $item['dsprsig'];
 856                         $dsprsig = json_decode(base64_decode($item['dsprsig']));
 857                         unset($item['dsprsig']);
 858                 }
 859
 860                 if (!empty($item['diaspora_signed_text'])) {
 861                         $diaspora_signed_text = $item['diaspora_signed_text'];
 862                         unset($item['diaspora_signed_text']);
 863                 } else {
 864                         $diaspora_signed_text = '';
 865                 }
 866
 867                 // Converting the plink
 868                 /// @TODO Check if this is really still needed
 869                 if ($item['network'] == NETWORK_OSTATUS) {
 870                         if (isset($item['plink'])) {
 871                                 $item['plink'] = OStatus::convertHref($item['plink']);
 872                         } elseif (isset($item['uri'])) {
 873                                 $item['plink'] = OStatus::convertHref($item['uri']);
 874                         }
 875                 }
 876
 877                 if (!empty($item['thr-parent'])) {
 878                         $item['parent-uri'] = $item['thr-parent'];
 879                 }
 880
 881                 if (x($item, 'gravity')) {
 882                         $item['gravity'] = intval($item['gravity']);
 883                 } elseif ($item['parent-uri'] === $item['uri']) {
 884                         $item['gravity'] = 0;
 885                 } elseif (activity_match($item['verb'],ACTIVITY_POST)) {
 886                         $item['gravity'] = 6;
 887                 } else {
 888                         $item['gravity'] = 6;   // extensible catchall
 889                 }
 890
 891                 $item['type'] = defaults($item, 'type', 'remote');
 892
 893                 $uid = intval($item['uid']);
 894
 895                 // check for create date and expire time
 896                 $expire_interval = Config::get('system', 'dbclean-expire-days', 0);
 897
 898                 $user = dba::selectFirst('user', ['expire'], ['uid' => $uid]);
 899                 if (DBM::is_result($user) && ($user['expire'] > 0) && (($user['expire'] < $expire_interval) || ($expire_interval == 0))) {
 900                         $expire_interval = $user['expire'];
 901                 }
 902
 903                 if (($expire_interval > 0) && !empty($item['created'])) {
 904                         $expire_date = time() - ($expire_interval * 86400);
 905                         $created_date = strtotime($item['created']);
 906                         if ($created_date < $expire_date) {
 907                                 logger('item-store: item created ('.date('c', $created_date).') before expiration time ('.date('c', $expire_date).'). ignored. ' . print_r($item,true), LOGGER_DEBUG);
 908                                 return 0;
 909                         }
 910                 }
 911
 912                 /*
 913                  * Do we already have this item?
 914                  * We have to check several networks since Friendica posts could be repeated
 915                  * via OStatus (maybe Diasporsa as well)
 916                  */
 917                 if (in_array($item['network'], [NETWORK_DIASPORA, NETWORK_DFRN, NETWORK_OSTATUS, ""])) {
 918                         $condition = ["`uri` = ? AND `uid` = ? AND `network` IN (?, ?, ?)",
 919                                 trim($item['uri']), $item['uid'],
 920                                 NETWORK_DIASPORA, NETWORK_DFRN, NETWORK_OSTATUS];
 921                         $existing = dba::selectFirst('item', ['id', 'network'], $condition);
 922                         if (DBM::is_result($existing)) {
 923                                 // We only log the entries with a different user id than 0. Otherwise we would have too many false positives
 924                                 if ($uid != 0) {
 925                                         logger("Item with uri ".$item['uri']." already existed for user ".$uid." with id ".$existing["id"]." target network ".$existing["network"]." - new network: ".$item['network']);
 926                                 }
 927
 928                                 return $existing["id"];
 929                         }
 930                 }
 931
 932                 self::addLanguageInPostopts($item);
 933
 934                 $item['wall']          = intval(defaults($item, 'wall', 0));
 935                 $item['extid']         = trim(defaults($item, 'extid', ''));
 936                 $item['author-name']   = trim(defaults($item, 'author-name', ''));
 937                 $item['author-link']   = trim(defaults($item, 'author-link', ''));
 938                 $item['author-avatar'] = trim(defaults($item, 'author-avatar', ''));
 939                 $item['owner-name']    = trim(defaults($item, 'owner-name', ''));
 940                 $item['owner-link']    = trim(defaults($item, 'owner-link', ''));
 941                 $item['owner-avatar']  = trim(defaults($item, 'owner-avatar', ''));
 942                 $item['received']      = ((x($item, 'received') !== false) ? DateTimeFormat::utc($item['received']) : DateTimeFormat::utcNow());
 943                 $item['created']       = ((x($item, 'created') !== false) ? DateTimeFormat::utc($item['created']) : $item['received']);
 944                 $item['edited']        = ((x($item, 'edited') !== false) ? DateTimeFormat::utc($item['edited']) : $item['created']);
 945                 $item['changed']       = ((x($item, 'changed') !== false) ? DateTimeFormat::utc($item['changed']) : $item['created']);
 946                 $item['commented']     = ((x($item, 'commented') !== false) ? DateTimeFormat::utc($item['commented']) : $item['created']);
 947                 $item['title']         = trim(defaults($item, 'title', ''));
 948                 $item['location']      = trim(defaults($item, 'location', ''));
 949                 $item['coord']         = trim(defaults($item, 'coord', ''));
 950                 $item['visible']       = ((x($item, 'visible') !== false) ? intval($item['visible'])         : 1);
 951                 $item['deleted']       = 0;
 952                 $item['parent-uri']    = trim(defaults($item, 'parent-uri', $item['uri']));
 953                 $item['verb']          = trim(defaults($item, 'verb', ''));
 954                 $item['object-type']   = trim(defaults($item, 'object-type', ''));
 955                 $item['object']        = trim(defaults($item, 'object', ''));
 956                 $item['target-type']   = trim(defaults($item, 'target-type', ''));
 957                 $item['target']        = trim(defaults($item, 'target', ''));
 958                 $item['plink']         = trim(defaults($item, 'plink', ''));
 959                 $item['allow_cid']     = trim(defaults($item, 'allow_cid', ''));
 960                 $item['allow_gid']     = trim(defaults($item, 'allow_gid', ''));
 961                 $item['deny_cid']      = trim(defaults($item, 'deny_cid', ''));
 962                 $item['deny_gid']      = trim(defaults($item, 'deny_gid', ''));
 963                 $item['private']       = intval(defaults($item, 'private', 0));
 964                 $item['bookmark']      = intval(defaults($item, 'bookmark', 0));
 965                 $item['body']          = trim(defaults($item, 'body', ''));
 966                 $item['tag']           = trim(defaults($item, 'tag', ''));
 967                 $item['attach']        = trim(defaults($item, 'attach', ''));
 968                 $item['app']           = trim(defaults($item, 'app', ''));
 969                 $item['origin']        = intval(defaults($item, 'origin', 0));
 970                 $item['postopts']      = trim(defaults($item, 'postopts', ''));
 971                 $item['resource-id']   = trim(defaults($item, 'resource-id', ''));
 972                 $item['event-id']      = intval(defaults($item, 'event-id', 0));
 973                 $item['inform']        = trim(defaults($item, 'inform', ''));
 974                 $item['file']          = trim(defaults($item, 'file', ''));
 975
 976                 // When there is no content then we don't post it
 977                 if ($item['body'].$item['title'] == '') {
 978                         return 0;
 979                 }
 980
 981                 // Items cannot be stored before they happen ...
 982                 if ($item['created'] > DateTimeFormat::utcNow()) {
 983                         $item['created'] = DateTimeFormat::utcNow();
 984                 }
 985
 986                 // We haven't invented time travel by now.
 987                 if ($item['edited'] > DateTimeFormat::utcNow()) {
 988                         $item['edited'] = DateTimeFormat::utcNow();
 989                 }
 990
 991                 if (($item['author-link'] == "") && ($item['owner-link'] == "")) {
 992                         logger("Both author-link and owner-link are empty. Called by: " . System::callstack(), LOGGER_DEBUG);
 993                 }
 994
 995                 $item['plink'] = defaults($item, 'plink', System::baseUrl() . '/display/' . urlencode($item['guid']));
 996
 997                 // The contact-id should be set before "self::insert" was called - but there seems to be issues sometimes
 998                 $item["contact-id"] = self::contactId($item);
 999
1000                 $default = ['url' => $item['author-link'], 'name' => $item['author-name'],
1001                         'photo' => $item['author-avatar'], 'network' => $item['network']];
1002
1003                 $item['author-id'] = defaults($item, 'author-id', Contact::getIdForURL($item["author-link"], 0, false, $default));
1004
1005                 if (Contact::isBlocked($item["author-id"])) {
1006                         logger('Contact '.$item["author-id"].' is blocked, item '.$item["uri"].' will not be stored');
1007                         return 0;
1008                 }
1009
1010                 $default = ['url' => $item['owner-link'], 'name' => $item['owner-name'],
1011                         'photo' => $item['owner-avatar'], 'network' => $item['network']];
1012
1013                 $item['owner-id'] = defaults($item, 'owner-id', Contact::getIdForURL($item["owner-link"], 0, false, $default));
1014
1015                 if (Contact::isBlocked($item["owner-id"])) {
1016                         logger('Contact '.$item["owner-id"].' is blocked, item '.$item["uri"].' will not be stored');
1017                         return 0;
1018                 }
1019
1020                 //unset($item['author-link']);
1021                 unset($item['author-name']);
1022                 unset($item['author-avatar']);
1023
1024                 //unset($item['owner-link']);
1025                 unset($item['owner-name']);
1026                 unset($item['owner-avatar']);
1027
1028                 if ($item['network'] == NETWORK_PHANTOM) {
1029                         logger('Missing network. Called by: '.System::callstack(), LOGGER_DEBUG);
1030
1031                         $contact = Contact::getDetailsByURL($item['author-link'], $item['uid']);
1032                         if (!empty($contact['network'])) {
1033                                 $item['network'] = $contact["network"];
1034                         } else {
1035                                 $item['network'] = NETWORK_DFRN;
1036                         }
1037                         logger("Set network to " . $item["network"] . " for " . $item["uri"], LOGGER_DEBUG);
1038                 }
1039
1040                 // Checking if there is already an item with the same guid
1041                 logger('Checking for an item for user '.$item['uid'].' on network '.$item['network'].' with the guid '.$item['guid'], LOGGER_DEBUG);
1042                 $condition = ['guid' => $item['guid'], 'network' => $item['network'], 'uid' => $item['uid']];
1043                 if (dba::exists('item', $condition)) {
1044                         logger('found item with guid '.$item['guid'].' for user '.$item['uid'].' on network '.$item['network'], LOGGER_DEBUG);
1045                         return 0;
1046                 }
1047
1048                 // Check for hashtags in the body and repair or add hashtag links
1049                 self::setHashtags($item);
1050
1051                 $item['thr-parent'] = $item['parent-uri'];
1052
1053                 $notify_type = '';
1054                 $allow_cid = '';
1055                 $allow_gid = '';
1056                 $deny_cid  = '';
1057                 $deny_gid  = '';
1058
1059                 if ($item['parent-uri'] === $item['uri']) {
1060                         $parent_id = 0;
1061                         $parent_deleted = 0;
1062                         $allow_cid = $item['allow_cid'];
1063                         $allow_gid = $item['allow_gid'];
1064                         $deny_cid  = $item['deny_cid'];
1065                         $deny_gid  = $item['deny_gid'];
1066                         $notify_type = 'wall-new';
1067                 } else {
1068                         // find the parent and snarf the item id and ACLs
1069                         // and anything else we need to inherit
1070
1071                         $fields = ['uri', 'parent-uri', 'id', 'deleted',
1072                                 'allow_cid', 'allow_gid', 'deny_cid', 'deny_gid',
1073                                 'wall', 'private', 'forum_mode', 'origin'];
1074                         $condition = ['uri' => $item['parent-uri'], 'uid' => $item['uid']];
1075                         $params = ['order' => ['id' => false]];
1076                         $parent = dba::selectFirst('item', $fields, $condition, $params);
1077
1078                         if (DBM::is_result($parent)) {
1079                                 // is the new message multi-level threaded?
1080                                 // even though we don't support it now, preserve the info
1081                                 // and re-attach to the conversation parent.
1082
1083                                 if ($parent['uri'] != $parent['parent-uri']) {
1084                                         $item['parent-uri'] = $parent['parent-uri'];
1085
1086                                         $condition = ['uri' => $item['parent-uri'],
1087                                                 'parent-uri' => $item['parent-uri'],
1088                                                 'uid' => $item['uid']];
1089                                         $params = ['order' => ['id' => false]];
1090                                         $toplevel_parent = dba::selectFirst('item', $fields, $condition, $params);
1091
1092                                         if (DBM::is_result($toplevel_parent)) {
1093                                                 $parent = $toplevel_parent;
1094                                         }
1095                                 }
1096
1097                                 $parent_id      = $parent['id'];
1098                                 $parent_deleted = $parent['deleted'];
1099                                 $allow_cid      = $parent['allow_cid'];
1100                                 $allow_gid      = $parent['allow_gid'];
1101                                 $deny_cid       = $parent['deny_cid'];
1102                                 $deny_gid       = $parent['deny_gid'];
1103                                 $item['wall']    = $parent['wall'];
1104                                 $notify_type    = 'comment-new';
1105
1106                                 /*
1107                                  * If the parent is private, force privacy for the entire conversation
1108                                  * This differs from the above settings as it subtly allows comments from
1109                                  * email correspondents to be private even if the overall thread is not.
1110                                  */
1111                                 if ($parent['private']) {
1112                                         $item['private'] = $parent['private'];
1113                                 }
1114
1115                                 /*
1116                                  * Edge case. We host a public forum that was originally posted to privately.
1117                                  * The original author commented, but as this is a comment, the permissions
1118                                  * weren't fixed up so it will still show the comment as private unless we fix it here.
1119                                  */
1120                                 if ((intval($parent['forum_mode']) == 1) && $parent['private']) {
1121                                         $item['private'] = 0;
1122                                 }
1123
1124                                 // If its a post from myself then tag the thread as "mention"
1125                                 logger("Checking if parent ".$parent_id." has to be tagged as mention for user ".$item['uid'], LOGGER_DEBUG);
1126                                 $user = dba::selectFirst('user', ['nickname'], ['uid' => $item['uid']]);
1127                                 if (DBM::is_result($user)) {
1128                                         $self = normalise_link(System::baseUrl() . '/profile/' . $user['nickname']);
1129                                         logger("'myself' is ".$self." for parent ".$parent_id." checking against ".$item['author-link']." and ".$item['owner-link'], LOGGER_DEBUG);
1130                                         if ((normalise_link($item['author-link']) == $self) || (normalise_link($item['owner-link']) == $self)) {
1131                                                 dba::update('thread', ['mention' => true], ['iid' => $parent_id]);
1132                                                 logger("tagged thread ".$parent_id." as mention for user ".$self, LOGGER_DEBUG);
1133                                         }
1134                                 }
1135                         } else {
1136                                 /*
1137                                  * Allow one to see reply tweets from status.net even when
1138                                  * we don't have or can't see the original post.
1139                                  */
1140                                 if ($force_parent) {
1141                                         logger('$force_parent=true, reply converted to top-level post.');
1142                                         $parent_id = 0;
1143                                         $item['parent-uri'] = $item['uri'];
1144                                         $item['gravity'] = 0;
1145                                 } else {
1146                                         logger('item parent '.$item['parent-uri'].' for '.$item['uid'].' was not found - ignoring item');
1147                                         return 0;
1148                                 }
1149
1150                                 $parent_deleted = 0;
1151                         }
1152                 }
1153
1154                 $condition = ["`uri` = ? AND `network` IN (?, ?) AND `uid` = ?",
1155                         $item['uri'], $item['network'], NETWORK_DFRN, $item['uid']];
1156                 if (dba::exists('item', $condition)) {
1157                         logger('duplicated item with the same uri found. '.print_r($item,true));
1158                         return 0;
1159                 }
1160
1161                 // On Friendica and Diaspora the GUID is unique
1162                 if (in_array($item['network'], [NETWORK_DFRN, NETWORK_DIASPORA])) {
1163                         $condition = ['guid' => $item['guid'], 'uid' => $item['uid']];
1164                         if (dba::exists('item', $condition)) {
1165                                 logger('duplicated item with the same guid found. '.print_r($item,true));
1166                                 return 0;
1167                         }
1168                 } else {
1169                         // Check for an existing post with the same content. There seems to be a problem with OStatus.
1170                         $condition = ["`body` = ? AND `network` = ? AND `created` = ? AND `contact-id` = ? AND `uid` = ?",
1171                                         $item['body'], $item['network'], $item['created'], $item['contact-id'], $item['uid']];
1172                         if (dba::exists('item', $condition)) {
1173                                 logger('duplicated item with the same body found. '.print_r($item,true));
1174                                 return 0;
1175                         }
1176                 }
1177
1178                 // Is this item available in the global items (with uid=0)?
1179                 if ($item["uid"] == 0) {
1180                         $item["global"] = true;
1181
1182                         // Set the global flag on all items if this was a global item entry
1183                         dba::update('item', ['global' => true], ['uri' => $item["uri"]]);
1184                 } else {
1185                         $item["global"] = dba::exists('item', ['uid' => 0, 'uri' => $item["uri"]]);
1186                 }
1187
1188                 // ACL settings
1189                 if (strlen($allow_cid) || strlen($allow_gid) || strlen($deny_cid) || strlen($deny_gid)) {
1190                         $private = 1;
1191                 } else {
1192                         $private = $item['private'];
1193                 }
1194
1195                 $item["allow_cid"] = $allow_cid;
1196                 $item["allow_gid"] = $allow_gid;
1197                 $item["deny_cid"] = $deny_cid;
1198                 $item["deny_gid"] = $deny_gid;
1199                 $item["private"] = $private;
1200                 $item["deleted"] = $parent_deleted;
1201
1202                 // Fill the cache field
1203                 put_item_in_cache($item);
1204
1205                 if ($notify) {
1206                         Addon::callHooks('post_local', $item);
1207                 } else {
1208                         Addon::callHooks('post_remote', $item);
1209                 }
1210
1211                 // This array field is used to trigger some automatic reactions
1212                 // It is mainly used in the "post_local" hook.
1213                 unset($item['api_source']);
1214
1215                 if (x($item, 'cancel')) {
1216                         logger('post cancelled by addon.');
1217                         return 0;
1218                 }
1219
1220                 /*
1221                  * Check for already added items.
1222                  * There is a timing issue here that sometimes creates double postings.
1223                  * An unique index would help - but the limitations of MySQL (maximum size of index values) prevent this.
1224                  */
1225                 if ($item["uid"] == 0) {
1226                         if (dba::exists('item', ['uri' => trim($item['uri']), 'uid' => 0])) {
1227                                 logger('Global item already stored. URI: '.$item['uri'].' on network '.$item['network'], LOGGER_DEBUG);
1228                                 return 0;
1229                         }
1230                 }
1231
1232                 logger('' . print_r($item,true), LOGGER_DATA);
1233
1234                 dba::transaction();
1235                 $ret = dba::insert('item', $item);
1236
1237                 // When the item was successfully stored we fetch the ID of the item.
1238                 if (DBM::is_result($ret)) {
1239                         $current_post = dba::lastInsertId();
1240                 } else {
1241                         // This can happen - for example - if there are locking timeouts.
1242                         dba::rollback();
1243
1244                         // Store the data into a spool file so that we can try again later.
1245
1246                         // At first we restore the Diaspora signature that we removed above.
1247                         if (isset($encoded_signature)) {
1248                                 $item['dsprsig'] = $encoded_signature;
1249                         }
1250
1251                         // Now we store the data in the spool directory
1252                         // We use "microtime" to keep the arrival order and "mt_rand" to avoid duplicates
1253                         $file = 'item-'.round(microtime(true) * 10000).'-'.mt_rand().'.msg';
1254
1255                         $spoolpath = get_spoolpath();
1256                         if ($spoolpath != "") {
1257                                 $spool = $spoolpath.'/'.$file;
1258                                 file_put_contents($spool, json_encode($item));
1259                                 logger("Item wasn't stored - Item was spooled into file ".$file, LOGGER_DEBUG);
1260                         }
1261                         return 0;
1262                 }
1263
1264                 if ($current_post == 0) {
1265                         // This is one of these error messages that never should occur.
1266                         logger("couldn't find created item - we better quit now.");
1267                         dba::rollback();
1268                         return 0;
1269                 }
1270
1271                 // How much entries have we created?
1272                 // We wouldn't need this query when we could use an unique index - but MySQL has length problems with them.
1273                 $entries = dba::count('item', ['uri' => $item['uri'], 'uid' => $item['uid'], 'network' => $item['network']]);
1274
1275                 if ($entries > 1) {
1276                         // There are duplicates. We delete our just created entry.
1277                         logger('Duplicated post occurred. uri = ' . $item['uri'] . ' uid = ' . $item['uid']);
1278
1279                         // Yes, we could do a rollback here - but we are having many users with MyISAM.
1280                         dba::delete('item', ['id' => $current_post]);
1281                         dba::commit();
1282                         return 0;
1283                 } elseif ($entries == 0) {
1284                         // This really should never happen since we quit earlier if there were problems.
1285                         logger("Something is terribly wrong. We haven't found our created entry.");
1286                         dba::rollback();
1287                         return 0;
1288                 }
1289
1290                 logger('created item '.$current_post);
1291                 self::updateContact($item);
1292
1293                 if (!$parent_id || ($item['parent-uri'] === $item['uri'])) {
1294                         $parent_id = $current_post;
1295                 }
1296
1297                 // Set parent id
1298                 dba::update('item', ['parent' => $parent_id], ['id' => $current_post]);
1299
1300                 $item['id'] = $current_post;
1301                 $item['parent'] = $parent_id;
1302
1303                 // update the commented timestamp on the parent
1304                 // Only update "commented" if it is really a comment
1305                 if (($item['verb'] == ACTIVITY_POST) || !Config::get("system", "like_no_comment")) {
1306                         dba::update('item', ['commented' => DateTimeFormat::utcNow(), 'changed' => DateTimeFormat::utcNow()], ['id' => $parent_id]);
1307                 } else {
1308                         dba::update('item', ['changed' => DateTimeFormat::utcNow()], ['id' => $parent_id]);
1309                 }
1310
1311                 if ($dsprsig) {
1312                         /*
1313                          * Friendica servers lower than 3.4.3-2 had double encoded the signature ...
1314                          * We can check for this condition when we decode and encode the stuff again.
1315                          */
1316                         if (base64_encode(base64_decode(base64_decode($dsprsig->signature))) == base64_decode($dsprsig->signature)) {
1317                                 $dsprsig->signature = base64_decode($dsprsig->signature);
1318                                 logger("Repaired double encoded signature from handle ".$dsprsig->signer, LOGGER_DEBUG);
1319                         }
1320
1321                         dba::insert('sign', ['iid' => $current_post, 'signed_text' => $dsprsig->signed_text,
1322                                                 'signature' => $dsprsig->signature, 'signer' => $dsprsig->signer]);
1323                 }
1324
1325                 if (!empty($diaspora_signed_text)) {
1326                         // Formerly we stored the signed text, the signature and the author in different fields.
1327                         // We now store the raw data so that we are more flexible.
1328                         dba::insert('sign', ['iid' => $current_post, 'signed_text' => $diaspora_signed_text]);
1329                 }
1330
1331                 $deleted = self::tagDeliver($item['uid'], $current_post);
1332
1333                 /*
1334                  * current post can be deleted if is for a community page and no mention are
1335                  * in it.
1336                  */
1337                 if (!$deleted && !$dontcache) {
1338                         $posted_item = dba::selectFirst('item', [], ['id' => $current_post]);
1339                         if (DBM::is_result($posted_item)) {
1340                                 if ($notify) {
1341                                         Addon::callHooks('post_local_end', $posted_item);
1342                                 } else {
1343                                         Addon::callHooks('post_remote_end', $posted_item);
1344                                 }
1345                         } else {
1346                                 logger('new item not found in DB, id ' . $current_post);
1347                         }
1348                 }
1349
1350                 if ($item['parent-uri'] === $item['uri']) {
1351                         self::addThread($current_post);
1352                 } else {
1353                         self::updateThread($parent_id);
1354                 }
1355
1356                 dba::commit();
1357
1358                 /*
1359                  * Due to deadlock issues with the "term" table we are doing these steps after the commit.
1360                  * This is not perfect - but a workable solution until we found the reason for the problem.
1361                  */
1362                 Term::insertFromTagFieldByItemId($current_post);
1363                 Term::insertFromFileFieldByItemId($current_post);
1364
1365                 if ($item['parent-uri'] === $item['uri']) {
1366                         self::addShadow($current_post);
1367                 } else {
1368                         self::addShadowPost($current_post);
1369                 }
1370
1371                 check_user_notification($current_post);
1372
1373                 if ($notify) {
1374                         Worker::add(['priority' => $priority, 'dont_fork' => true], "Notifier", $notify_type, $current_post);
1375                 } elseif (!empty($parent) && $parent['origin']) {
1376                         Worker::add(['priority' => PRIORITY_HIGH, 'dont_fork' => true], "Notifier", "comment-import", $current_post);
1377                 }
1378
1379                 return $current_post;
1380         }
1381
1382         /**
1383          * @brief Distributes public items to the receivers
1384          *
1385          * @param integer $itemid      Item ID that should be added
1386          * @param string  $signed_text Original text (for Diaspora signatures), JSON encoded.
1387          */
1388         public static function distribute($itemid, $signed_text = '')
1389         {
1390                 $condition = ["`id` IN (SELECT `parent` FROM `item` WHERE `id` = ?)", $itemid];
1391                 $parent = dba::selectFirst('item', ['owner-id'], $condition);
1392                 if (!DBM::is_result($parent)) {
1393                         return;
1394                 }
1395
1396                 // Only distribute public items from native networks
1397                 $condition = ['id' => $itemid, 'uid' => 0,
1398                         'network' => [NETWORK_DFRN, NETWORK_DIASPORA, NETWORK_OSTATUS, ""],
1399                         'visible' => true, 'deleted' => false, 'moderated' => false, 'private' => false];
1400                 $item = dba::selectFirst('item', [], ['id' => $itemid]);
1401                 if (!DBM::is_result($item)) {
1402                         return;
1403                 }
1404
1405                 unset($item['id']);
1406                 unset($item['parent']);
1407                 unset($item['mention']);
1408                 unset($item['wall']);
1409                 unset($item['origin']);
1410                 unset($item['starred']);
1411                 unset($item['rendered-hash']);
1412                 unset($item['rendered-html']);
1413
1414                 $users = [];
1415
1416                 $condition = ["`nurl` IN (SELECT `nurl` FROM `contact` WHERE `id` = ?) AND `uid` != 0 AND NOT `blocked` AND `rel` IN (?, ?)",
1417                         $parent['owner-id'], CONTACT_IS_SHARING,  CONTACT_IS_FRIEND];
1418                 $contacts = dba::select('contact', ['uid'], $condition);
1419                 while ($contact = dba::fetch($contacts)) {
1420                         $users[$contact['uid']] = $contact['uid'];
1421                 }
1422
1423                 $origin_uid = 0;
1424
1425                 if ($item['uri'] != $item['parent-uri']) {
1426                         $parents = dba::select('item', ['uid', 'origin'], ["`uri` = ? AND `uid` != 0", $item['parent-uri']]);
1427                         while ($parent = dba::fetch($parents)) {
1428                                 $users[$parent['uid']] = $parent['uid'];
1429                                 if ($parent['origin'] && !$item['origin']) {
1430                                         $origin_uid = $parent['uid'];
1431                                 }
1432                         }
1433                 }
1434
1435                 foreach ($users as $uid) {
1436                         if ($origin_uid == $uid) {
1437                                 $item['diaspora_signed_text'] = $signed_text;
1438                         }
1439                         self::storeForUser($itemid, $item, $uid);
1440                 }
1441         }
1442
1443         /**
1444          * @brief Store public items for the receivers
1445          *
1446          * @param integer $itemid Item ID that should be added
1447          * @param array   $item   The item entry that will be stored
1448          * @param integer $uid    The user that will receive the item entry
1449          */
1450         private static function storeForUser($itemid, $item, $uid)
1451         {
1452                 $item['uid'] = $uid;
1453                 $item['origin'] = 0;
1454                 $item['wall'] = 0;
1455                 if ($item['uri'] == $item['parent-uri']) {
1456                         $item['contact-id'] = Contact::getIdForURL($item['owner-link'], $uid);
1457                 } else {
1458                         $item['contact-id'] = Contact::getIdForURL($item['author-link'], $uid);
1459                 }
1460
1461                 if (empty($item['contact-id'])) {
1462                         $self = dba::selectFirst('contact', ['id'], ['self' => true, 'uid' => $uid]);
1463                         if (!DBM::is_result($self)) {
1464                                 return;
1465                         }
1466                         $item['contact-id'] = $self['id'];
1467                 }
1468
1469                 if (in_array($item['type'], ["net-comment", "wall-comment"])) {
1470                         $item['type'] = 'remote-comment';
1471                 } elseif ($item['type'] == 'wall') {
1472                         $item['type'] = 'remote';
1473                 }
1474
1475                 /// @todo Handling of "event-id"
1476
1477                 $notify = false;
1478                 if ($item['uri'] == $item['parent-uri']) {
1479                         $contact = dba::selectFirst('contact', [], ['id' => $item['contact-id'], 'self' => false]);
1480                         if (DBM::is_result($contact)) {
1481                                 $notify = self::isRemoteSelf($contact, $item);
1482                         }
1483                 }
1484
1485                 $distributed = self::insert($item, false, $notify, true);
1486
1487                 if (!$distributed) {
1488                         logger("Distributed public item " . $itemid . " for user " . $uid . " wasn't stored", LOGGER_DEBUG);
1489                 } else {
1490                         logger("Distributed public item " . $itemid . " for user " . $uid . " with id " . $distributed, LOGGER_DEBUG);
1491                 }
1492         }
1493
1494         /**
1495          * @brief Add a shadow entry for a given item id that is a thread starter
1496          *
1497          * We store every public item entry additionally with the user id "0".
1498          * This is used for the community page and for the search.
1499          * It is planned that in the future we will store public item entries only once.
1500          *
1501          * @param integer $itemid Item ID that should be added
1502          */
1503         public static function addShadow($itemid)
1504         {
1505                 $fields = ['uid', 'private', 'moderated', 'visible', 'deleted', 'network'];
1506                 $condition = ['id' => $itemid, 'parent' => [0, $itemid]];
1507                 $item = dba::selectFirst('item', $fields, $condition);
1508
1509                 if (!DBM::is_result($item)) {
1510                         return;
1511                 }
1512
1513                 // is it already a copy?
1514                 if (($itemid == 0) || ($item['uid'] == 0)) {
1515                         return;
1516                 }
1517
1518                 // Is it a visible public post?
1519                 if (!$item["visible"] || $item["deleted"] || $item["moderated"] || $item["private"]) {
1520                         return;
1521                 }
1522
1523                 // is it an entry from a connector? Only add an entry for natively connected networks
1524                 if (!in_array($item["network"], [NETWORK_DFRN, NETWORK_DIASPORA, NETWORK_OSTATUS, ""])) {
1525                         return;
1526                 }
1527
1528                 $item = dba::selectFirst('item', [], ['id' => $itemid]);
1529
1530                 if (DBM::is_result($item) && ($item["allow_cid"] == '') && ($item["allow_gid"] == '') &&
1531                         ($item["deny_cid"] == '') && ($item["deny_gid"] == '')) {
1532
1533                         if (!dba::exists('item', ['uri' => $item['uri'], 'uid' => 0])) {
1534                                 // Preparing public shadow (removing user specific data)
1535                                 $item['uid'] = 0;
1536                                 unset($item['id']);
1537                                 unset($item['parent']);
1538                                 unset($item['wall']);
1539                                 unset($item['mention']);
1540                                 unset($item['origin']);
1541                                 unset($item['starred']);
1542                                 unset($item['rendered-hash']);
1543                                 unset($item['rendered-html']);
1544                                 if ($item['uri'] == $item['parent-uri']) {
1545                                         $item['contact-id'] = Contact::getIdForURL($item['owner-link']);
1546                                 } else {
1547                                         $item['contact-id'] = Contact::getIdForURL($item['author-link']);
1548                                 }
1549
1550                                 if (in_array($item['type'], ["net-comment", "wall-comment"])) {
1551                                         $item['type'] = 'remote-comment';
1552                                 } elseif ($item['type'] == 'wall') {
1553                                         $item['type'] = 'remote';
1554                                 }
1555
1556                                 $public_shadow = self::insert($item, false, false, true);
1557
1558                                 logger("Stored public shadow for thread ".$itemid." under id ".$public_shadow, LOGGER_DEBUG);
1559                         }
1560                 }
1561         }
1562
1563         /**
1564          * @brief Add a shadow entry for a given item id that is a comment
1565          *
1566          * This function does the same like the function above - but for comments
1567          *
1568          * @param integer $itemid Item ID that should be added
1569          */
1570         public static function addShadowPost($itemid)
1571         {
1572                 $item = dba::selectFirst('item', [], ['id' => $itemid]);
1573                 if (!DBM::is_result($item)) {
1574                         return;
1575                 }
1576
1577                 // Is it a toplevel post?
1578                 if ($item['id'] == $item['parent']) {
1579                         self::addShadow($itemid);
1580                         return;
1581                 }
1582
1583                 // Is this a shadow entry?
1584                 if ($item['uid'] == 0) {
1585                         return;
1586                 }
1587
1588                 // Is there a shadow parent?
1589                 if (!dba::exists('item', ['uri' => $item['parent-uri'], 'uid' => 0])) {
1590                         return;
1591                 }
1592
1593                 // Is there already a shadow entry?
1594                 if (dba::exists('item', ['uri' => $item['uri'], 'uid' => 0])) {
1595                         return;
1596                 }
1597
1598                 // Save "origin" and "parent" state
1599                 $origin = $item['origin'];
1600                 $parent = $item['parent'];
1601
1602                 // Preparing public shadow (removing user specific data)
1603                 $item['uid'] = 0;
1604                 unset($item['id']);
1605                 unset($item['parent']);
1606                 unset($item['wall']);
1607                 unset($item['mention']);
1608                 unset($item['origin']);
1609                 unset($item['starred']);
1610                 unset($item['rendered-hash']);
1611                 unset($item['rendered-html']);
1612                 $item['contact-id'] = Contact::getIdForURL($item['author-link']);
1613
1614                 if (in_array($item['type'], ["net-comment", "wall-comment"])) {
1615                         $item['type'] = 'remote-comment';
1616                 } elseif ($item['type'] == 'wall') {
1617                         $item['type'] = 'remote';
1618                 }
1619
1620                 $public_shadow = self::insert($item, false, false, true);
1621
1622                 logger("Stored public shadow for comment ".$item['uri']." under id ".$public_shadow, LOGGER_DEBUG);
1623
1624                 // If this was a comment to a Diaspora post we don't get our comment back.
1625                 // This means that we have to distribute the comment by ourselves.
1626                 if ($origin && dba::exists('item', ['id' => $parent, 'network' => NETWORK_DIASPORA])) {
1627                         self::distribute($public_shadow);
1628                 }
1629         }
1630
1631          /**
1632          * Adds a "lang" specification in a "postopts" element of given $arr,
1633          * if possible and not already present.
1634          * Expects "body" element to exist in $arr.
1635          */
1636         private static function addLanguageInPostopts(&$item)
1637         {
1638                 $postopts = "";
1639
1640                 if (!empty($item['postopts'])) {
1641                         if (strstr($item['postopts'], 'lang=')) {
1642                                 // do not override
1643                                 return;
1644                         }
1645                         $postopts = $item['postopts'];
1646                 }
1647
1648                 $naked_body = Text\BBCode::toPlaintext($item['body'], false);
1649
1650                 $languages = (new Text_LanguageDetect())->detect($naked_body, 3);
1651
1652                 if (sizeof($languages) > 0) {
1653                         if ($postopts != '') {
1654                                 $postopts .= '&'; // arbitrary separator, to be reviewed
1655                         }
1656
1657                         $postopts .= 'lang=';
1658                         $sep = "";
1659
1660                         foreach ($languages as $language => $score) {
1661                                 $postopts .= $sep . $language . ";" . $score;
1662                                 $sep = ':';
1663                         }
1664                         $item['postopts'] = $postopts;
1665                 }
1666         }
1667
1668         /**
1669          * @brief Creates an unique guid out of a given uri
1670          *
1671          * @param string $uri uri of an item entry
1672          * @param string $host hostname for the GUID prefix
1673          * @return string unique guid
1674          */
1675         public static function guidFromUri($uri, $host)
1676         {
1677                 // Our regular guid routine is using this kind of prefix as well
1678                 // We have to avoid that different routines could accidentally create the same value
1679                 $parsed = parse_url($uri);
1680
1681                 // We use a hash of the hostname as prefix for the guid
1682                 $guid_prefix = hash("crc32", $host);
1683
1684                 // Remove the scheme to make sure that "https" and "http" doesn't make a difference
1685                 unset($parsed["scheme"]);
1686
1687                 // Glue it together to be able to make a hash from it
1688                 $host_id = implode("/", $parsed);
1689
1690                 // We could use any hash algorithm since it isn't a security issue
1691                 $host_hash = hash("ripemd128", $host_id);
1692
1693                 return $guid_prefix.$host_hash;
1694         }
1695
1696         /**
1697          * generate an unique URI
1698          *
1699          * @param integer $uid User id
1700          * @param string $guid An existing GUID (Otherwise it will be generated)
1701          *
1702          * @return string
1703          */
1704         public static function newURI($uid, $guid = "")
1705         {
1706                 if ($guid == "") {
1707                         $guid = get_guid(32);
1708                 }
1709
1710                 $hostname = self::getApp()->get_hostname();
1711
1712                 $user = dba::selectFirst('user', ['nickname'], ['uid' => $uid]);
1713
1714                 $uri = "urn:X-dfrn:" . $hostname . ':' . $user['nickname'] . ':' . $guid;
1715
1716                 return $uri;
1717         }
1718
1719         /**
1720          * @brief Set "success_update" and "last-item" to the date of the last time we heard from this contact
1721          *
1722          * This can be used to filter for inactive contacts.
1723          * Only do this for public postings to avoid privacy problems, since poco data is public.
1724          * Don't set this value if it isn't from the owner (could be an author that we don't know)
1725          *
1726          * @param array $arr Contains the just posted item record
1727          */
1728         private static function updateContact($arr)
1729         {
1730                 // Unarchive the author
1731                 $contact = dba::selectFirst('contact', [], ['id' => $arr["author-id"]]);
1732                 if (DBM::is_result($contact)) {
1733                         Contact::unmarkForArchival($contact);
1734                 }
1735
1736                 // Unarchive the contact if it's not our own contact
1737                 $contact = dba::selectFirst('contact', [], ['id' => $arr["contact-id"], 'self' => false]);
1738                 if (DBM::is_result($contact)) {
1739                         Contact::unmarkForArchival($contact);
1740                 }
1741
1742                 $update = (!$arr['private'] && (($arr["author-link"] === $arr["owner-link"]) || ($arr["parent-uri"] === $arr["uri"])));
1743
1744                 // Is it a forum? Then we don't care about the rules from above
1745                 if (!$update && ($arr["network"] == NETWORK_DFRN) && ($arr["parent-uri"] === $arr["uri"])) {
1746                         if (dba::exists('contact', ['id' => $arr['contact-id'], 'forum' => true])) {
1747                                 $update = true;
1748                         }
1749                 }
1750
1751                 if ($update) {
1752                         dba::update('contact', ['success_update' => $arr['received'], 'last-item' => $arr['received']],
1753                                 ['id' => $arr['contact-id']]);
1754                 }
1755                 // Now do the same for the system wide contacts with uid=0
1756                 if (!$arr['private']) {
1757                         dba::update('contact', ['success_update' => $arr['received'], 'last-item' => $arr['received']],
1758                                 ['id' => $arr['owner-id']]);
1759
1760                         if ($arr['owner-id'] != $arr['author-id']) {
1761                                 dba::update('contact', ['success_update' => $arr['received'], 'last-item' => $arr['received']],
1762                                         ['id' => $arr['author-id']]);
1763                         }
1764                 }
1765         }
1766
1767         public static function setHashtags(&$item)
1768         {
1769
1770                 $tags = get_tags($item["body"]);
1771
1772                 // No hashtags?
1773                 if (!count($tags)) {
1774                         return false;
1775                 }
1776
1777                 // This sorting is important when there are hashtags that are part of other hashtags
1778                 // Otherwise there could be problems with hashtags like #test and #test2
1779                 rsort($tags);
1780
1781                 $URLSearchString = "^\[\]";
1782
1783                 // All hashtags should point to the home server if "local_tags" is activated
1784                 if (Config::get('system', 'local_tags')) {
1785                         $item["body"] = preg_replace("/#\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",
1786                                         "#[url=".System::baseUrl()."/search?tag=$2]$2[/url]", $item["body"]);
1787
1788                         $item["tag"] = preg_replace("/#\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",
1789                                         "#[url=".System::baseUrl()."/search?tag=$2]$2[/url]", $item["tag"]);
1790                 }
1791
1792                 // mask hashtags inside of url, bookmarks and attachments to avoid urls in urls
1793                 $item["body"] = preg_replace_callback("/\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",
1794                         function ($match) {
1795                                 return ("[url=" . str_replace("#", "&num;", $match[1]) . "]" . str_replace("#", "&num;", $match[2]) . "[/url]");
1796                         }, $item["body"]);
1797
1798                 $item["body"] = preg_replace_callback("/\[bookmark\=([$URLSearchString]*)\](.*?)\[\/bookmark\]/ism",
1799                         function ($match) {
1800                                 return ("[bookmark=" . str_replace("#", "&num;", $match[1]) . "]" . str_replace("#", "&num;", $match[2]) . "[/bookmark]");
1801                         }, $item["body"]);
1802
1803                 $item["body"] = preg_replace_callback("/\[attachment (.*)\](.*?)\[\/attachment\]/ism",
1804                         function ($match) {
1805                                 return ("[attachment " . str_replace("#", "&num;", $match[1]) . "]" . $match[2] . "[/attachment]");
1806                         }, $item["body"]);
1807
1808                 // Repair recursive urls
1809                 $item["body"] = preg_replace("/&num;\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",
1810                                 "&num;$2", $item["body"]);
1811
1812                 foreach ($tags as $tag) {
1813                         if ((strpos($tag, '#') !== 0) || strpos($tag, '[url=')) {
1814                                 continue;
1815                         }
1816
1817                         $basetag = str_replace('_',' ',substr($tag,1));
1818
1819                         $newtag = '#[url=' . System::baseUrl() . '/search?tag=' . rawurlencode($basetag) . ']' . $basetag . '[/url]';
1820
1821                         $item["body"] = str_replace($tag, $newtag, $item["body"]);
1822
1823                         if (!stristr($item["tag"], "/search?tag=" . $basetag . "]" . $basetag . "[/url]")) {
1824                                 if (strlen($item["tag"])) {
1825                                         $item["tag"] = ','.$item["tag"];
1826                                 }
1827                                 $item["tag"] = $newtag.$item["tag"];
1828                         }
1829                 }
1830
1831                 // Convert back the masked hashtags
1832                 $item["body"] = str_replace("&num;", "#", $item["body"]);
1833         }
1834
1835         public static function getGuidById($id)
1836         {
1837                 $item = dba::selectFirst('item', ['guid'], ['id' => $id]);
1838                 if (DBM::is_result($item)) {
1839                         return $item['guid'];
1840                 } else {
1841                         return '';
1842                 }
1843         }
1844
1845         public static function getIdAndNickByGuid($guid, $uid = 0)
1846         {
1847                 $nick = "";
1848                 $id = 0;
1849
1850                 if ($uid == 0) {
1851                         $uid == local_user();
1852                 }
1853
1854                 // Does the given user have this item?
1855                 if ($uid) {
1856                         $item = dba::fetch_first("SELECT `item`.`id`, `user`.`nickname` FROM `item`
1857                                 INNER JOIN `user` ON `user`.`uid` = `item`.`uid`
1858                                 WHERE `item`.`visible` AND NOT `item`.`deleted` AND NOT `item`.`moderated`
1859                                         AND `item`.`guid` = ? AND `item`.`uid` = ?", $guid, $uid);
1860                         if (DBM::is_result($item)) {
1861                                 $id = $item["id"];
1862                                 $nick = $item["nickname"];
1863                         }
1864                 }
1865
1866                 // Or is it anywhere on the server?
1867                 if ($nick == "") {
1868                         $item = dba::fetch_first("SELECT `item`.`id`, `user`.`nickname` FROM `item`
1869                                 INNER JOIN `user` ON `user`.`uid` = `item`.`uid`
1870                                 WHERE `item`.`visible` AND NOT `item`.`deleted` AND NOT `item`.`moderated`
1871                                         AND `item`.`allow_cid` = ''  AND `item`.`allow_gid` = ''
1872                                         AND `item`.`deny_cid`  = '' AND `item`.`deny_gid`  = ''
1873                                         AND NOT `item`.`private` AND `item`.`wall`
1874                                         AND `item`.`guid` = ?", $guid);
1875                         if (DBM::is_result($item)) {
1876                                 $id = $item["id"];
1877                                 $nick = $item["nickname"];
1878                         }
1879                 }
1880                 return ["nick" => $nick, "id" => $id];
1881         }
1882
1883         /**
1884          * look for mention tags and setup a second delivery chain for forum/community posts if appropriate
1885          * @param int $uid
1886          * @param int $item_id
1887          * @return bool true if item was deleted, else false
1888          */
1889         private static function tagDeliver($uid, $item_id)
1890         {
1891                 $mention = false;
1892
1893                 $user = dba::selectFirst('user', [], ['uid' => $uid]);
1894                 if (!DBM::is_result($user)) {
1895                         return;
1896                 }
1897
1898                 $community_page = (($user['page-flags'] == PAGE_COMMUNITY) ? true : false);
1899                 $prvgroup = (($user['page-flags'] == PAGE_PRVGROUP) ? true : false);
1900
1901                 $item = dba::selectFirst('item', [], ['id' => $item_id]);
1902                 if (!DBM::is_result($item)) {
1903                         return;
1904                 }
1905
1906                 $link = normalise_link(System::baseUrl() . '/profile/' . $user['nickname']);
1907
1908                 /*
1909                  * Diaspora uses their own hardwired link URL in @-tags
1910                  * instead of the one we supply with webfinger
1911                  */
1912                 $dlink = normalise_link(System::baseUrl() . '/u/' . $user['nickname']);
1913
1914                 $cnt = preg_match_all('/[\@\!]\[url\=(.*?)\](.*?)\[\/url\]/ism', $item['body'], $matches, PREG_SET_ORDER);
1915                 if ($cnt) {
1916                         foreach ($matches as $mtch) {
1917                                 if (link_compare($link, $mtch[1]) || link_compare($dlink, $mtch[1])) {
1918                                         $mention = true;
1919                                         logger('mention found: ' . $mtch[2]);
1920                                 }
1921                         }
1922                 }
1923
1924                 if (!$mention) {
1925                         if (($community_page || $prvgroup) &&
1926                                   !$item['wall'] && !$item['origin'] && ($item['id'] == $item['parent'])) {
1927                                 // mmh.. no mention.. community page or private group... no wall.. no origin.. top-post (not a comment)
1928                                 // delete it!
1929                                 logger("no-mention top-level post to community or private group. delete.");
1930                                 dba::delete('item', ['id' => $item_id]);
1931                                 return true;
1932                         }
1933                         return;
1934                 }
1935
1936                 $arr = ['item' => $item, 'user' => $user];
1937
1938                 Addon::callHooks('tagged', $arr);
1939
1940                 if (!$community_page && !$prvgroup) {
1941                         return;
1942                 }
1943
1944                 /*
1945                  * tgroup delivery - setup a second delivery chain
1946                  * prevent delivery looping - only proceed
1947                  * if the message originated elsewhere and is a top-level post
1948                  */
1949                 if ($item['wall'] || $item['origin'] || ($item['id'] != $item['parent'])) {
1950                         return;
1951                 }
1952
1953                 // now change this copy of the post to a forum head message and deliver to all the tgroup members
1954                 $self = dba::selectFirst('contact', ['id', 'name', 'url', 'thumb'], ['uid' => $uid, 'self' => true]);
1955                 if (!DBM::is_result($self)) {
1956                         return;
1957                 }
1958
1959                 $owner_id = Contact::getIdForURL($self['url']);
1960
1961                 // also reset all the privacy bits to the forum default permissions
1962
1963                 $private = ($user['allow_cid'] || $user['allow_gid'] || $user['deny_cid'] || $user['deny_gid']) ? 1 : 0;
1964
1965                 $forum_mode = ($prvgroup ? 2 : 1);
1966
1967                 $fields = ['wall' => true, 'origin' => true, 'forum_mode' => $forum_mode, 'contact-id' => $self['id'],
1968                         'owner-id' => $owner_id, 'owner-link' => $self['url'], 'private' => $private, 'allow_cid' => $user['allow_cid'],
1969                         'allow_gid' => $user['allow_gid'], 'deny_cid' => $user['deny_cid'], 'deny_gid' => $user['deny_gid']];
1970                 dba::update('item', $fields, ['id' => $item_id]);
1971
1972                 self::updateThread($item_id);
1973
1974                 Worker::add(['priority' => PRIORITY_HIGH, 'dont_fork' => true], 'Notifier', 'tgroup', $item_id);
1975         }
1976
1977         public static function isRemoteSelf($contact, &$datarray)
1978         {
1979                 $a = get_app();
1980
1981                 if (!$contact['remote_self']) {
1982                         return false;
1983                 }
1984
1985                 // Prevent the forwarding of posts that are forwarded
1986                 if ($datarray["extid"] == NETWORK_DFRN) {
1987                         logger('Already forwarded', LOGGER_DEBUG);
1988                         return false;
1989                 }
1990
1991                 // Prevent to forward already forwarded posts
1992                 if ($datarray["app"] == $a->get_hostname()) {
1993                         logger('Already forwarded (second test)', LOGGER_DEBUG);
1994                         return false;
1995                 }
1996
1997                 // Only forward posts
1998                 if ($datarray["verb"] != ACTIVITY_POST) {
1999                         logger('No post', LOGGER_DEBUG);
2000                         return false;
2001                 }
2002
2003                 if (($contact['network'] != NETWORK_FEED) && $datarray['private']) {
2004                         logger('Not public', LOGGER_DEBUG);
2005                         return false;
2006                 }
2007
2008                 $datarray2 = $datarray;
2009                 logger('remote-self start - Contact '.$contact['url'].' - '.$contact['remote_self'].' Item '.print_r($datarray, true), LOGGER_DEBUG);
2010                 if ($contact['remote_self'] == 2) {
2011                         $self = dba::selectFirst('contact', ['id', 'name', 'url', 'thumb'],
2012                                         ['uid' => $contact['uid'], 'self' => true]);
2013                         if (DBM::is_result($self)) {
2014                                 $datarray['contact-id'] = $self["id"];
2015
2016                                 $datarray['owner-name'] = $self["name"];
2017                                 $datarray['owner-link'] = $self["url"];
2018                                 $datarray['owner-avatar'] = $self["thumb"];
2019
2020                                 $datarray['author-name']   = $datarray['owner-name'];
2021                                 $datarray['author-link']   = $datarray['owner-link'];
2022                                 $datarray['author-avatar'] = $datarray['owner-avatar'];
2023
2024                                 unset($datarray['created']);
2025                                 unset($datarray['edited']);
2026
2027                                 unset($datarray['network']);
2028                                 unset($datarray['owner-id']);
2029                                 unset($datarray['author-id']);
2030                         }
2031
2032                         if ($contact['network'] != NETWORK_FEED) {
2033                                 $datarray["guid"] = get_guid(32);
2034                                 unset($datarray["plink"]);
2035                                 $datarray["uri"] = self::newURI($contact['uid'], $datarray["guid"]);
2036                                 $datarray["parent-uri"] = $datarray["uri"];
2037                                 $datarray["thr-parent"] = $datarray["uri"];
2038                                 $datarray["extid"] = NETWORK_DFRN;
2039                                 $urlpart = parse_url($datarray2['author-link']);
2040                                 $datarray["app"] = $urlpart["host"];
2041                         } else {
2042                                 $datarray['private'] = 0;
2043                         }
2044                 }
2045
2046                 if ($contact['network'] != NETWORK_FEED) {
2047                         // Store the original post
2048                         $result = self::insert($datarray2, false, false);
2049                         logger('remote-self post original item - Contact '.$contact['url'].' return '.$result.' Item '.print_r($datarray2, true), LOGGER_DEBUG);
2050                 } else {
2051                         $datarray["app"] = "Feed";
2052                         $result = true;
2053                 }
2054
2055                 // Trigger automatic reactions for addons
2056                 $datarray['api_source'] = true;
2057
2058                 // We have to tell the hooks who we are - this really should be improved
2059                 $_SESSION["authenticated"] = true;
2060                 $_SESSION["uid"] = $contact['uid'];
2061
2062                 return $result;
2063         }
2064
2065         /**
2066          *
2067          * @param string $s
2068          * @param int    $uid
2069          * @param array  $item
2070          * @param int    $cid
2071          * @return string
2072          */
2073         public static function fixPrivatePhotos($s, $uid, $item = null, $cid = 0)
2074         {
2075                 if (Config::get('system', 'disable_embedded')) {
2076                         return $s;
2077                 }
2078
2079                 logger('check for photos', LOGGER_DEBUG);
2080                 $site = substr(System::baseUrl(), strpos(System::baseUrl(), '://'));
2081
2082                 $orig_body = $s;
2083                 $new_body = '';
2084
2085                 $img_start = strpos($orig_body, '[img');
2086                 $img_st_close = ($img_start !== false ? strpos(substr($orig_body, $img_start), ']') : false);
2087                 $img_len = ($img_start !== false ? strpos(substr($orig_body, $img_start + $img_st_close + 1), '[/img]') : false);
2088
2089                 while (($img_st_close !== false) && ($img_len !== false)) {
2090                         $img_st_close++; // make it point to AFTER the closing bracket
2091                         $image = substr($orig_body, $img_start + $img_st_close, $img_len);
2092
2093                         logger('found photo ' . $image, LOGGER_DEBUG);
2094
2095                         if (stristr($image, $site . '/photo/')) {
2096                                 // Only embed locally hosted photos
2097                                 $replace = false;
2098                                 $i = basename($image);
2099                                 $i = str_replace(['.jpg', '.png', '.gif'], ['', '', ''], $i);
2100                                 $x = strpos($i, '-');
2101
2102                                 if ($x) {
2103                                         $res = substr($i, $x + 1);
2104                                         $i = substr($i, 0, $x);
2105                                         $fields = ['data', 'type', 'allow_cid', 'allow_gid', 'deny_cid', 'deny_gid'];
2106                                         $photo = dba::selectFirst('photo', $fields, ['resource-id' => $i, 'scale' => $res, 'uid' => $uid]);
2107                                         if (DBM::is_result($photo)) {
2108                                                 /*
2109                                                  * Check to see if we should replace this photo link with an embedded image
2110                                                  * 1. No need to do so if the photo is public
2111                                                  * 2. If there's a contact-id provided, see if they're in the access list
2112                                                  *    for the photo. If so, embed it.
2113                                                  * 3. Otherwise, if we have an item, see if the item permissions match the photo
2114                                                  *    permissions, regardless of order but first check to see if they're an exact
2115                                                  *    match to save some processing overhead.
2116                                                  */
2117                                                 if (self::hasPermissions($photo)) {
2118                                                         if ($cid) {
2119                                                                 $recips = self::enumeratePermissions($photo);
2120                                                                 if (in_array($cid, $recips)) {
2121                                                                         $replace = true;
2122                                                                 }
2123                                                         } elseif ($item) {
2124                                                                 if (self::samePermissions($item, $photo)) {
2125                                                                         $replace = true;
2126                                                                 }
2127                                                         }
2128                                                 }
2129                                                 if ($replace) {
2130                                                         $data = $photo['data'];
2131                                                         $type = $photo['type'];
2132
2133                                                         // If a custom width and height were specified, apply before embedding
2134                                                         if (preg_match("/\[img\=([0-9]*)x([0-9]*)\]/is", substr($orig_body, $img_start, $img_st_close), $match)) {
2135                                                                 logger('scaling photo', LOGGER_DEBUG);
2136
2137                                                                 $width = intval($match[1]);
2138                                                                 $height = intval($match[2]);
2139
2140                                                                 $Image = new Image($data, $type);
2141                                                                 if ($Image->isValid()) {
2142                                                                         $Image->scaleDown(max($width, $height));
2143                                                                         $data = $Image->asString();
2144                                                                         $type = $Image->getType();
2145                                                                 }
2146                                                         }
2147
2148                                                         logger('replacing photo', LOGGER_DEBUG);
2149                                                         $image = 'data:' . $type . ';base64,' . base64_encode($data);
2150                                                         logger('replaced: ' . $image, LOGGER_DATA);
2151                                                 }
2152                                         }
2153                                 }
2154                         }
2155
2156                         $new_body = $new_body . substr($orig_body, 0, $img_start + $img_st_close) . $image . '[/img]';
2157                         $orig_body = substr($orig_body, $img_start + $img_st_close + $img_len + strlen('[/img]'));
2158                         if ($orig_body === false) {
2159                                 $orig_body = '';
2160                         }
2161
2162                         $img_start = strpos($orig_body, '[img');
2163                         $img_st_close = ($img_start !== false ? strpos(substr($orig_body, $img_start), ']') : false);
2164                         $img_len = ($img_start !== false ? strpos(substr($orig_body, $img_start + $img_st_close + 1), '[/img]') : false);
2165                 }
2166
2167                 $new_body = $new_body . $orig_body;
2168
2169                 return $new_body;
2170         }
2171
2172         private static function hasPermissions($obj)
2173         {
2174                 return (
2175                         (
2176                                 x($obj, 'allow_cid')
2177                         ) || (
2178                                 x($obj, 'allow_gid')
2179                         ) || (
2180                                 x($obj, 'deny_cid')
2181                         ) || (
2182                                 x($obj, 'deny_gid')
2183                         )
2184                 );
2185         }
2186
2187         private static function samePermissions($obj1, $obj2)
2188         {
2189                 // first part is easy. Check that these are exactly the same.
2190                 if (($obj1['allow_cid'] == $obj2['allow_cid'])
2191                         && ($obj1['allow_gid'] == $obj2['allow_gid'])
2192                         && ($obj1['deny_cid'] == $obj2['deny_cid'])
2193                         && ($obj1['deny_gid'] == $obj2['deny_gid'])) {
2194                         return true;
2195                 }
2196
2197                 // This is harder. Parse all the permissions and compare the resulting set.
2198                 $recipients1 = self::enumeratePermissions($obj1);
2199                 $recipients2 = self::enumeratePermissions($obj2);
2200                 sort($recipients1);
2201                 sort($recipients2);
2202
2203                 /// @TODO Comparison of arrays, maybe use array_diff_assoc() here?
2204                 return ($recipients1 == $recipients2);
2205         }
2206
2207         // returns an array of contact-ids that are allowed to see this object
2208         private static function enumeratePermissions($obj)
2209         {
2210                 $allow_people = expand_acl($obj['allow_cid']);
2211                 $allow_groups = Group::expand(expand_acl($obj['allow_gid']));
2212                 $deny_people  = expand_acl($obj['deny_cid']);
2213                 $deny_groups  = Group::expand(expand_acl($obj['deny_gid']));
2214                 $recipients   = array_unique(array_merge($allow_people, $allow_groups));
2215                 $deny         = array_unique(array_merge($deny_people, $deny_groups));
2216                 $recipients   = array_diff($recipients, $deny);
2217                 return $recipients;
2218         }
2219
2220         public static function getFeedTags($item)
2221         {
2222                 $ret = [];
2223                 $matches = false;
2224                 $cnt = preg_match_all('|\#\[url\=(.*?)\](.*?)\[\/url\]|', $item['tag'], $matches);
2225                 if ($cnt) {
2226                         for ($x = 0; $x < $cnt; $x ++) {
2227                                 if ($matches[1][$x]) {
2228                                         $ret[$matches[2][$x]] = ['#', $matches[1][$x], $matches[2][$x]];
2229                                 }
2230                         }
2231                 }
2232                 $matches = false;
2233                 $cnt = preg_match_all('|\@\[url\=(.*?)\](.*?)\[\/url\]|', $item['tag'], $matches);
2234                 if ($cnt) {
2235                         for ($x = 0; $x < $cnt; $x ++) {
2236                                 if ($matches[1][$x]) {
2237                                         $ret[] = ['@', $matches[1][$x], $matches[2][$x]];
2238                                 }
2239                         }
2240                 }
2241                 return $ret;
2242         }
2243
2244         public static function expire($uid, $days, $network = "", $force = false)
2245         {
2246                 if (!$uid || ($days < 1)) {
2247                         return;
2248                 }
2249
2250                 /*
2251                  * $expire_network_only = save your own wall posts
2252                  * and just expire conversations started by others
2253                  */
2254                 $expire_network_only = PConfig::get($uid,'expire', 'network_only');
2255                 $sql_extra = (intval($expire_network_only) ? " AND wall = 0 " : "");
2256
2257                 if ($network != "") {
2258                         $sql_extra .= sprintf(" AND network = '%s' ", dbesc($network));
2259
2260                         /*
2261                          * There is an index "uid_network_received" but not "uid_network_created"
2262                          * This avoids the creation of another index just for one purpose.
2263                          * And it doesn't really matter wether to look at "received" or "created"
2264                          */
2265                         $range = "AND `received` < UTC_TIMESTAMP() - INTERVAL %d DAY ";
2266                 } else {
2267                         $range = "AND `created` < UTC_TIMESTAMP() - INTERVAL %d DAY ";
2268                 }
2269
2270                 $r = q("SELECT `file`, `resource-id`, `starred`, `type`, `id` FROM `item`
2271                         WHERE `uid` = %d $range
2272                         AND `id` = `parent`
2273                         $sql_extra
2274                         AND `deleted` = 0",
2275                         intval($uid),
2276                         intval($days)
2277                 );
2278
2279                 if (!DBM::is_result($r)) {
2280                         return;
2281                 }
2282
2283                 $expire_items = PConfig::get($uid, 'expire', 'items', 1);
2284
2285                 // Forcing expiring of items - but not notes and marked items
2286                 if ($force) {
2287                         $expire_items = true;
2288                 }
2289
2290                 $expire_notes = PConfig::get($uid, 'expire', 'notes', 1);
2291                 $expire_starred = PConfig::get($uid, 'expire', 'starred', 1);
2292                 $expire_photos = PConfig::get($uid, 'expire', 'photos', 0);
2293
2294                 logger('User '.$uid.': expire: # items=' . count($r). "; expire items: $expire_items, expire notes: $expire_notes, expire starred: $expire_starred, expire photos: $expire_photos");
2295
2296                 foreach ($r as $item) {
2297
2298                         // don't expire filed items
2299
2300                         if (strpos($item['file'],'[') !== false) {
2301                                 continue;
2302                         }
2303
2304                         // Only expire posts, not photos and photo comments
2305
2306                         if ($expire_photos == 0 && strlen($item['resource-id'])) {
2307                                 continue;
2308                         } elseif ($expire_starred == 0 && intval($item['starred'])) {
2309                                 continue;
2310                         } elseif ($expire_notes == 0 && $item['type'] == 'note') {
2311                                 continue;
2312                         } elseif ($expire_items == 0 && $item['type'] != 'note') {
2313                                 continue;
2314                         }
2315
2316                         self::deleteById($item['id'], PRIORITY_LOW);
2317                 }
2318         }
2319
2320         public static function firstPostDate($uid, $wall = false)
2321         {
2322                 $condition = ['uid' => $uid, 'wall' => $wall, 'deleted' => false, 'visible' => true, 'moderated' => false];
2323                 $params = ['order' => ['created' => false]];
2324                 $thread = dba::selectFirst('thread', ['created'], $condition, $params);
2325                 if (DBM::is_result($thread)) {
2326                         return substr(DateTimeFormat::local($thread['created']), 0, 10);
2327                 }
2328                 return false;
2329         }
2330
2331         /**
2332          * @brief add/remove activity to an item
2333          *
2334          * Toggle activities as like,dislike,attend of an item
2335          *
2336          * @param string $item_id
2337          * @param string $verb
2338          *              Activity verb. One of
2339          *                      like, unlike, dislike, undislike, attendyes, unattendyes,
2340          *                      attendno, unattendno, attendmaybe, unattendmaybe
2341          * @hook 'post_local_end'
2342          *              array $arr
2343          *                      'post_id' => ID of posted item
2344          */
2345         public static function performLike($item_id, $verb)
2346         {
2347                 if (!local_user() && !remote_user()) {
2348                         return false;
2349                 }
2350
2351                 switch ($verb) {
2352                         case 'like':
2353                         case 'unlike':
2354                                 $bodyverb = L10n::t('%1$s likes %2$s\'s %3$s');
2355                                 $activity = ACTIVITY_LIKE;
2356                                 break;
2357                         case 'dislike':
2358                         case 'undislike':
2359                                 $bodyverb = L10n::t('%1$s doesn\'t like %2$s\'s %3$s');
2360                                 $activity = ACTIVITY_DISLIKE;
2361                                 break;
2362                         case 'attendyes':
2363                         case 'unattendyes':
2364                                 $bodyverb = L10n::t('%1$s is attending %2$s\'s %3$s');
2365                                 $activity = ACTIVITY_ATTEND;
2366                                 break;
2367                         case 'attendno':
2368                         case 'unattendno':
2369                                 $bodyverb = L10n::t('%1$s is not attending %2$s\'s %3$s');
2370                                 $activity = ACTIVITY_ATTENDNO;
2371                                 break;
2372                         case 'attendmaybe':
2373                         case 'unattendmaybe':
2374                                 $bodyverb = L10n::t('%1$s may attend %2$s\'s %3$s');
2375                                 $activity = ACTIVITY_ATTENDMAYBE;
2376                                 break;
2377                         default:
2378                                 logger('like: unknown verb ' . $verb . ' for item ' . $item_id);
2379                                 return false;
2380                 }
2381
2382                 // Enable activity toggling instead of on/off
2383                 $event_verb_flag = $activity === ACTIVITY_ATTEND || $activity === ACTIVITY_ATTENDNO || $activity === ACTIVITY_ATTENDMAYBE;
2384
2385                 logger('like: verb ' . $verb . ' item ' . $item_id);
2386
2387                 $item = dba::selectFirst('item', [], ['`id` = ? OR `uri` = ?', $item_id, $item_id]);
2388                 if (!DBM::is_result($item)) {
2389                         logger('like: unknown item ' . $item_id);
2390                         return false;
2391                 }
2392
2393                 $uid = $item['uid'];
2394                 if (($uid == 0) && local_user()) {
2395                         $uid = local_user();
2396                 }
2397
2398                 if (!can_write_wall($uid)) {
2399                         logger('like: unable to write on wall ' . $uid);
2400                         return false;
2401                 }
2402
2403                 // Retrieves the local post owner
2404                 $owner_self_contact = dba::selectFirst('contact', [], ['uid' => $uid, 'self' => true]);
2405                 if (!DBM::is_result($owner_self_contact)) {
2406                         logger('like: unknown owner ' . $uid);
2407                         return false;
2408                 }
2409
2410                 // Retrieve the current logged in user's public contact
2411                 $author_id = public_contact();
2412
2413                 $author_contact = dba::selectFirst('contact', [], ['id' => $author_id]);
2414                 if (!DBM::is_result($author_contact)) {
2415                         logger('like: unknown author ' . $author_id);
2416                         return false;
2417                 }
2418
2419                 // Contact-id is the uid-dependant author contact
2420                 if (local_user() == $uid) {
2421                         $item_contact_id = $owner_self_contact['id'];
2422                         $item_contact = $owner_self_contact;
2423                 } else {
2424                         $item_contact_id = Contact::getIdForURL($author_contact['url'], $uid, true);
2425                         $item_contact = dba::selectFirst('contact', [], ['id' => $item_contact_id]);
2426                         if (!DBM::is_result($item_contact)) {
2427                                 logger('like: unknown item contact ' . $item_contact_id);
2428                                 return false;
2429                         }
2430                 }
2431
2432                 // Look for an existing verb row
2433                 // event participation are essentially radio toggles. If you make a subsequent choice,
2434                 // we need to eradicate your first choice.
2435                 if ($event_verb_flag) {
2436                         $verbs = "'" . dbesc(ACTIVITY_ATTEND) . "', '" . dbesc(ACTIVITY_ATTENDNO) . "', '" . dbesc(ACTIVITY_ATTENDMAYBE) . "'";
2437                 } else {
2438                         $verbs = "'".dbesc($activity)."'";
2439                 }
2440
2441                 /// @todo This query is expected to be a performance eater due to the "OR" - it has to be changed totally
2442                 $existing_like = q("SELECT `id`, `guid`, `verb` FROM `item`
2443                         WHERE `verb` IN ($verbs)
2444                         AND `deleted` = 0
2445                         AND `author-id` = %d
2446                         AND `uid` = %d
2447                         AND (`parent` = '%s' OR `parent-uri` = '%s' OR `thr-parent` = '%s')
2448                         LIMIT 1",
2449                         intval($author_contact['id']),
2450                         intval($item['uid']),
2451                         dbesc($item_id), dbesc($item_id), dbesc($item['uri'])
2452                 );
2453
2454                 // If it exists, mark it as deleted
2455                 if (DBM::is_result($existing_like)) {
2456                         $like_item = $existing_like[0];
2457
2458                         // Already voted, undo it
2459                         $fields = ['deleted' => true, 'unseen' => true, 'changed' => DateTimeFormat::utcNow()];
2460                         dba::update('item', $fields, ['id' => $like_item['id']]);
2461
2462                         // Clean up the Diaspora signatures for this like
2463                         // Go ahead and do it even if Diaspora support is disabled. We still want to clean up
2464                         // if it had been enabled in the past
2465                         dba::delete('sign', ['iid' => $like_item['id']]);
2466
2467                         $like_item_id = $like_item['id'];
2468                         Worker::add(PRIORITY_HIGH, "Notifier", "like", $like_item_id);
2469
2470                         if (!$event_verb_flag || $like_item['verb'] == $activity) {
2471                                 return true;
2472                         }
2473                 }
2474
2475                 // Verb is "un-something", just trying to delete existing entries
2476                 if (strpos($verb, 'un') === 0) {
2477                         return true;
2478                 }
2479
2480                 // Else or if event verb different from existing row, create a new item row
2481                 $post_type = (($item['resource-id']) ? L10n::t('photo') : L10n::t('status'));
2482                 if ($item['object-type'] === ACTIVITY_OBJ_EVENT) {
2483                         $post_type = L10n::t('event');
2484                 }
2485                 $objtype = $item['resource-id'] ? ACTIVITY_OBJ_IMAGE : ACTIVITY_OBJ_NOTE ;
2486                 $link = xmlify('<link rel="alternate" type="text/html" href="' . System::baseUrl() . '/display/' . $owner_self_contact['nick'] . '/' . $item['id'] . '" />' . "\n") ;
2487                 $body = $item['body'];
2488
2489                 $obj = <<< EOT
2490
2491                 <object>
2492                         <type>$objtype</type>
2493                         <local>1</local>
2494                         <id>{$item['uri']}</id>
2495                         <link>$link</link>
2496                         <title></title>
2497                         <content>$body</content>
2498                 </object>
2499 EOT;
2500
2501                 $ulink = '[url=' . $author_contact['url'] . ']' . $author_contact['name'] . '[/url]';
2502                 $alink = '[url=' . $item['author-link'] . ']' . $item['author-name'] . '[/url]';
2503                 $plink = '[url=' . System::baseUrl() . '/display/' . $owner_self_contact['nick'] . '/' . $item['id'] . ']' . $post_type . '[/url]';
2504
2505                 $new_item = [
2506                         'guid'          => get_guid(32),
2507                         'uri'           => self::newURI($item['uid']),
2508                         'uid'           => $item['uid'],
2509                         'contact-id'    => $item_contact_id,
2510                         'type'          => 'activity',
2511                         'wall'          => $item['wall'],
2512                         'origin'        => 1,
2513                         'gravity'       => GRAVITY_LIKE,
2514                         'parent'        => $item['id'],
2515                         'parent-uri'    => $item['uri'],
2516                         'thr-parent'    => $item['uri'],
2517                         'owner-id'      => $item['owner-id'],
2518                         'owner-name'    => $item['owner-name'],
2519                         'owner-link'    => $item['owner-link'],
2520                         'owner-avatar'  => $item['owner-avatar'],
2521                         'author-id'     => $author_contact['id'],
2522                         'author-name'   => $author_contact['name'],
2523                         'author-link'   => $author_contact['url'],
2524                         'author-avatar' => $author_contact['thumb'],
2525                         'body'          => sprintf($bodyverb, $ulink, $alink, $plink),
2526                         'verb'          => $activity,
2527                         'object-type'   => $objtype,
2528                         'object'        => $obj,
2529                         'allow_cid'     => $item['allow_cid'],
2530                         'allow_gid'     => $item['allow_gid'],
2531                         'deny_cid'      => $item['deny_cid'],
2532                         'deny_gid'      => $item['deny_gid'],
2533                         'visible'       => 1,
2534                         'unseen'        => 1,
2535                 ];
2536
2537                 $new_item_id = self::insert($new_item);
2538
2539                 // If the parent item isn't visible then set it to visible
2540                 if (!$item['visible']) {
2541                         self::update(['visible' => true], ['id' => $item['id']]);
2542                 }
2543
2544                 // Save the author information for the like in case we need to relay to Diaspora
2545                 Diaspora::storeLikeSignature($item_contact, $new_item_id);
2546
2547                 $new_item['id'] = $new_item_id;
2548
2549                 Addon::callHooks('post_local_end', $new_item);
2550
2551                 Worker::add(PRIORITY_HIGH, "Notifier", "like", $new_item_id);
2552
2553                 return true;
2554         }
2555
2556         private static function addThread($itemid, $onlyshadow = false)
2557         {
2558                 $fields = ['uid', 'created', 'edited', 'commented', 'received', 'changed', 'wall', 'private', 'pubmail',
2559                         'moderated', 'visible', 'starred', 'bookmark', 'contact-id',
2560                         'deleted', 'origin', 'forum_mode', 'mention', 'network', 'author-id', 'owner-id'];
2561                 $condition = ["`id` = ? AND (`parent` = ? OR `parent` = 0)", $itemid, $itemid];
2562                 $item = dba::selectFirst('item', $fields, $condition);
2563
2564                 if (!DBM::is_result($item)) {
2565                         return;
2566                 }
2567
2568                 $item['iid'] = $itemid;
2569
2570                 if (!$onlyshadow) {
2571                         $result = dba::insert('thread', $item);
2572
2573                         logger("Add thread for item ".$itemid." - ".print_r($result, true), LOGGER_DEBUG);
2574                 }
2575         }
2576
2577         private static function updateThread($itemid, $setmention = false)
2578         {
2579                 $fields = ['uid', 'guid', 'title', 'body', 'created', 'edited', 'commented', 'received', 'changed',
2580                         'wall', 'private', 'pubmail', 'moderated', 'visible', 'starred', 'bookmark', 'contact-id',
2581                         'deleted', 'origin', 'forum_mode', 'network', 'author-id', 'owner-id', 'rendered-html', 'rendered-hash'];
2582                 $condition = ["`id` = ? AND (`parent` = ? OR `parent` = 0)", $itemid, $itemid];
2583
2584                 $item = dba::selectFirst('item', $fields, $condition);
2585                 if (!DBM::is_result($item)) {
2586                         return;
2587                 }
2588
2589                 if ($setmention) {
2590                         $item["mention"] = 1;
2591                 }
2592
2593                 $sql = "";
2594
2595                 $fields = [];
2596
2597                 foreach ($item as $field => $data) {
2598                         if (!in_array($field, ["guid", "title", "body", "rendered-html", "rendered-hash"])) {
2599                                 $fields[$field] = $data;
2600                         }
2601                 }
2602
2603                 $result = dba::update('thread', $fields, ['iid' => $itemid]);
2604
2605                 logger("Update thread for item ".$itemid." - guid ".$item["guid"]." - ".(int)$result, LOGGER_DEBUG);
2606
2607                 // Updating a shadow item entry
2608                 $items = dba::selectFirst('item', ['id'], ['guid' => $item['guid'], 'uid' => 0]);
2609
2610                 if (!DBM::is_result($items)) {
2611                         return;
2612                 }
2613
2614                 $fields = ['title' => $item['title'], 'body' => $item['body'],
2615                         'rendered-html' => $item['rendered-html'], 'rendered-hash' => $item['rendered-hash']];
2616                 $result = dba::update('item', $fields, ['id' => $items['id']]);
2617
2618                 logger("Updating public shadow for post ".$items["id"]." - guid ".$item["guid"]." Result: ".print_r($result, true), LOGGER_DEBUG);
2619         }
2620
2621         private static function deleteThread($itemid, $itemuri = "")
2622         {
2623                 $item = dba::selectFirst('thread', ['uid'], ['iid' => $itemid]);
2624                 if (!DBM::is_result($item)) {
2625                         logger('No thread found for id '.$itemid, LOGGER_DEBUG);
2626                         return;
2627                 }
2628
2629                 // Using dba::delete at this time could delete the associated item entries
2630                 $result = dba::e("DELETE FROM `thread` WHERE `iid` = ?", $itemid);
2631
2632                 logger("deleteThread: Deleted thread for item ".$itemid." - ".print_r($result, true), LOGGER_DEBUG);
2633
2634                 if ($itemuri != "") {
2635                         $condition = ["`uri` = ? AND NOT `deleted` AND NOT (`uid` IN (?, 0))", $itemuri, $item["uid"]];
2636                         if (!dba::exists('item', $condition)) {
2637                                 dba::delete('item', ['uri' => $itemuri, 'uid' => 0]);
2638                                 logger("deleteThread: Deleted shadow for item ".$itemuri, LOGGER_DEBUG);
2639                         }
2640                 }
2641         }
2642 }