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', 'network',
  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',
  43                         'owner-id', 'owner-link', 'owner-name', 'owner-avatar',
  44                         'contact-id', 'contact-link', 'contact-name', 'contact-avatar',
  45                         '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                 // We prefer the data from the user's contact over the public one
  70                 if (!empty($row['author-link']) && !empty($row['contact-link']) &&
  71                         ($row['author-link'] == $row['contact-link'])) {
  72                         if (isset($row['author-avatar']) && !empty($row['contact-avatar'])) {
  73                                 $row['author-avatar'] = $row['contact-avatar'];
  74                         }
  75                         if (isset($row['author-name']) && !empty($row['contact-name'])) {
  76                                 $row['author-name'] = $row['contact-name'];
  77                         }
  78                 }
  79
  80                 if (!empty($row['owner-link']) && !empty($row['contact-link']) &&
  81                         ($row['owner-link'] == $row['contact-link'])) {
  82                         if (isset($row['owner-avatar']) && !empty($row['contact-avatar'])) {
  83                                 $row['owner-avatar'] = $row['contact-avatar'];
  84                         }
  85                         if (isset($row['owner-name']) && !empty($row['contact-name'])) {
  86                                 $row['owner-name'] = $row['contact-name'];
  87                         }
  88                 }
  89
  90                 // We can always comment on posts from these networks
  91                 if (isset($row['writable']) && !empty($row['network']) &&
  92                         in_array($row['network'], [NETWORK_DFRN, NETWORK_DIASPORA, NETWORK_OSTATUS])) {
  93                         $row['writable'] = true;
  94                 }
  95
  96                 return $row;
  97         }
  98
  99         /**
 100          * @brief Fills an array with data from an item query
 101          *
 102          * @param object $stmt statement object
 103          * @return array Data array
 104          */
 105         public static function inArray($stmt, $do_close = true) {
 106                 if (is_bool($stmt)) {
 107                         return $stmt;
 108                 }
 109
 110                 $data = [];
 111                 while ($row = self::fetch($stmt)) {
 112                         $data[] = $row;
 113                 }
 114                 if ($do_close) {
 115                         dba::close($stmt);
 116                 }
 117                 return $data;
 118         }
 119
 120         /**
 121          * Retrieve a single record from the item table for a given user and returns it in an associative array
 122          *
 123          * @brief Retrieve a single record from a table
 124          * @param integer $uid User ID
 125          * @param array  $fields
 126          * @param array  $condition
 127          * @param array  $params
 128          * @return bool|array
 129          * @see dba::select
 130          */
 131         public static function selectFirstForUser($uid, array $selected = [], array $condition = [], $params = [])
 132         {
 133                 $params['uid'] = $uid;
 134
 135                 if (empty($selected)) {
 136                         $selected = Item::DISPLAY_FIELDLIST;
 137                 }
 138
 139                 return self::selectFirst($selected, $condition, $params);
 140         }
 141
 142         /**
 143          * @brief Select rows from the item table for a given user
 144          *
 145          * @param integer $uid User ID
 146          * @param array  $selected  Array of selected fields, empty for all
 147          * @param array  $condition Array of fields for condition
 148          * @param array  $params    Array of several parameters
 149          *
 150          * @return boolean|object
 151          */
 152         public static function selectForUser($uid, array $selected = [], array $condition = [], $params = [])
 153         {
 154                 $params['uid'] = $uid;
 155
 156                 if (empty($selected)) {
 157                         $selected = Item::DISPLAY_FIELDLIST;
 158                 }
 159
 160                 return self::select($selected, $condition, $params);
 161         }
 162
 163         /**
 164          * Retrieve a single record from the item table and returns it in an associative array
 165          *
 166          * @brief Retrieve a single record from a table
 167          * @param array  $fields
 168          * @param array  $condition
 169          * @param array  $params
 170          * @return bool|array
 171          * @see dba::select
 172          */
 173         public static function selectFirst(array $fields = [], array $condition = [], $params = [])
 174         {
 175                 $params['limit'] = 1;
 176
 177                 $result = self::select($fields, $condition, $params);
 178
 179                 if (is_bool($result)) {
 180                         return $result;
 181                 } else {
 182                         $row = self::fetch($result);
 183                         dba::close($result);
 184                         return $row;
 185                 }
 186         }
 187
 188         /**
 189          * @brief Select rows from the item table
 190          *
 191          * @param array  $selected  Array of selected fields, empty for all
 192          * @param array  $condition Array of fields for condition
 193          * @param array  $params    Array of several parameters
 194          *
 195          * @return boolean|object
 196          */
 197         public static function select(array $selected = [], array $condition = [], $params = [])
 198         {
 199                 $uid = 0;
 200                 $usermode = false;
 201
 202                 if (isset($params['uid'])) {
 203                         $uid = $params['uid'];
 204                         $usermode = true;
 205                 }
 206
 207                 $fields = self::fieldlist($selected);
 208
 209                 $select_fields = self::constructSelectFields($fields, $selected);
 210
 211                 $condition_string = dba::buildCondition($condition);
 212
 213                 $condition_string = self::addTablesToFields($condition_string, $fields);
 214
 215                 if ($usermode) {
 216                         $condition_string = $condition_string . ' AND ' . self::condition(false);
 217                 }
 218
 219                 $param_string = self::addTablesToFields(dba::buildParameter($params), $fields);
 220
 221                 $table = "`item` " . self::constructJoins($uid, $select_fields . $condition_string . $param_string, false);
 222
 223                 $sql = "SELECT " . $select_fields . " FROM " . $table . $condition_string . $param_string;
 224
 225                 return dba::p($sql, $condition);
 226         }
 227
 228         /**
 229          * @brief Select rows from the starting post in the item table
 230          *
 231          * @param integer $uid User ID
 232          * @param array  $fields    Array of selected fields, empty for all
 233          * @param array  $condition Array of fields for condition
 234          * @param array  $params    Array of several parameters
 235          *
 236          * @return boolean|object
 237          */
 238         public static function selectThreadForUser($uid, array $selected = [], array $condition = [], $params = [])
 239         {
 240                 $params['uid'] = $uid;
 241
 242                 if (empty($selected)) {
 243                         $selected = Item::DISPLAY_FIELDLIST;
 244                 }
 245
 246                 return self::selectThread($selected, $condition, $params);
 247         }
 248
 249         /**
 250          * Retrieve a single record from the starting post in the item table and returns it in an associative array
 251          *
 252          * @brief Retrieve a single record from a table
 253          * @param integer $uid User ID
 254          * @param array  $selected
 255          * @param array  $condition
 256          * @param array  $params
 257          * @return bool|array
 258          * @see dba::select
 259          */
 260         public static function selectFirstThreadForUser($uid, array $selected = [], array $condition = [], $params = [])
 261         {
 262                 $params['uid'] = $uid;
 263
 264                 if (empty($selected)) {
 265                         $selected = Item::DISPLAY_FIELDLIST;
 266                 }
 267
 268                 return self::selectFirstThread($selected, $condition, $params);
 269         }
 270
 271         /**
 272          * Retrieve a single record from the starting post in the item table and returns it in an associative array
 273          *
 274          * @brief Retrieve a single record from a table
 275          * @param array  $fields
 276          * @param array  $condition
 277          * @param array  $params
 278          * @return bool|array
 279          * @see dba::select
 280          */
 281         public static function selectFirstThread(array $fields = [], array $condition = [], $params = [])
 282         {
 283                 $params['limit'] = 1;
 284                 $result = self::selectThread($fields, $condition, $params);
 285
 286                 if (is_bool($result)) {
 287                         return $result;
 288                 } else {
 289                         $row = self::fetch($result);
 290                         dba::close($result);
 291                         return $row;
 292                 }
 293         }
 294
 295         /**
 296          * @brief Select rows from the starting post in the item table
 297          *
 298          * @param array  $selected  Array of selected fields, empty for all
 299          * @param array  $condition Array of fields for condition
 300          * @param array  $params    Array of several parameters
 301          *
 302          * @return boolean|object
 303          */
 304         public static function selectThread(array $selected = [], array $condition = [], $params = [])
 305         {
 306                 $uid = 0;
 307                 $usermode = false;
 308
 309                 if (isset($params['uid'])) {
 310                         $uid = $params['uid'];
 311                         $usermode = true;
 312                 }
 313
 314                 $fields = self::fieldlist($selected);
 315
 316                 $threadfields = ['thread' => ['iid', 'uid', 'contact-id', 'owner-id', 'author-id',
 317                         'created', 'edited', 'commented', 'received', 'changed', 'wall', 'private',
 318                         'pubmail', 'moderated', 'visible', 'starred', 'ignored', 'bookmark',
 319                         'unseen', 'deleted', 'origin', 'forum_mode', 'mention', 'network']];
 320
 321                 $select_fields = self::constructSelectFields($fields, $selected);
 322
 323                 $condition_string = dba::buildCondition($condition);
 324
 325                 $condition_string = self::addTablesToFields($condition_string, $threadfields);
 326                 $condition_string = self::addTablesToFields($condition_string, $fields);
 327
 328                 if ($usermode) {
 329                         $condition_string = $condition_string . ' AND ' . self::condition(true);
 330                 }
 331
 332                 $param_string = dba::buildParameter($params);
 333                 $param_string = self::addTablesToFields($param_string, $threadfields);
 334                 $param_string = self::addTablesToFields($param_string, $fields);
 335
 336                 $table = "`thread` " . self::constructJoins($uid, $select_fields . $condition_string . $param_string, true);
 337
 338                 $sql = "SELECT " . $select_fields . " FROM " . $table . $condition_string . $param_string;
 339
 340                 return dba::p($sql, $condition);
 341         }
 342
 343         /**
 344          * @brief Returns a list of fields that are associated with the item table
 345          *
 346          * @return array field list
 347          */
 348         private static function fieldlist($selected)
 349         {
 350                 $fields = [];
 351
 352                 $fields['item'] = ['id', 'uid', 'parent', 'uri', 'parent-uri', 'thr-parent', 'guid',
 353                         'contact-id', 'owner-id', 'author-id', 'type', 'wall', 'gravity', 'extid',
 354                         'created', 'edited', 'commented', 'received', 'changed',
 355                         'title', 'body', 'app', 'verb', 'object-type', 'object', 'target-type', 'target',
 356                         'postopts', 'plink', 'resource-id', 'event-id', 'tag', 'attach', 'inform',
 357                         'file', 'location', 'coord', 'allow_cid', 'allow_gid', 'deny_cid', 'deny_gid',
 358                         'private', 'pubmail', 'moderated', 'visible', 'starred', 'bookmark',
 359                         'unseen', 'deleted', 'origin', 'forum_mode', 'mention',
 360                         'rendered-hash', 'rendered-html', 'global', 'content-warning',
 361                         'id' => 'item_id', 'network'];
 362
 363                 $fields['author'] = ['url' => 'author-link', 'name' => 'author-name',
 364                         'thumb' => 'author-avatar', 'nick' => 'author-nick'];
 365
 366                 $fields['owner'] = ['url' => 'owner-link', 'name' => 'owner-name',
 367                         'thumb' => 'owner-avatar', 'nick' => 'owner-nick'];
 368
 369                 $fields['contact'] = ['url' => 'contact-link', 'name' => 'contact-name', 'thumb' => 'contact-avatar',
 370                         'writable', 'self', 'id' => 'cid', 'alias', 'uid' => 'contact-uid',
 371                         'photo', 'name-date', 'uri-date', 'avatar-date', 'thumb', 'dfrn-id'];
 372
 373                 $fields['parent-item'] = ['guid' => 'parent-guid', 'network' => 'parent-network'];
 374
 375                 $fields['parent-item-author'] = ['url' => 'parent-author-link', 'name' => 'parent-author-name'];
 376
 377                 $fields['event'] = ['created' => 'event-created', 'edited' => 'event-edited',
 378                         'start' => 'event-start','finish' => 'event-finish',
 379                         'summary' => 'event-summary','desc' => 'event-desc',
 380                         'location' => 'event-location', 'type' => 'event-type',
 381                         'nofinish' => 'event-nofinish','adjust' => 'event-adjust',
 382                         'ignore' => 'event-ignore', 'id' => 'event-id'];
 383
 384                 $fields['sign'] = ['signed_text', 'signature', 'signer'];
 385
 386                 return $fields;
 387         }
 388
 389         /**
 390          * @brief Returns SQL condition for the "select" functions
 391          *
 392          * @param boolean $thread_mode Called for the items (false) or for the threads (true)
 393          *
 394          * @return string SQL condition
 395          */
 396         private static function condition($thread_mode)
 397         {
 398                 if ($thread_mode) {
 399                         $master_table = "`thread`";
 400                 } else {
 401                         $master_table = "`item`";
 402                 }
 403                 return "$master_table.`visible` AND NOT $master_table.`deleted` AND NOT $master_table.`moderated` AND (`user-item`.`hidden` IS NULL OR NOT `user-item`.`hidden`) ";
 404         }
 405
 406         /**
 407          * @brief Returns all needed "JOIN" commands for the "select" functions
 408          *
 409          * @param integer $uid User ID
 410          * @param string $sql_commands The parts of the built SQL commands in the "select" functions
 411          * @param boolean $thread_mode Called for the items (false) or for the threads (true)
 412          *
 413          * @return string The SQL joins for the "select" functions
 414          */
 415         private static function constructJoins($uid, $sql_commands, $thread_mode)
 416         {
 417                 if ($thread_mode) {
 418                         $master_table = "`thread`";
 419                         $master_table_key = "`thread`.`iid`";
 420                         $joins = "STRAIGHT_JOIN `item` ON `item`.`id` = `thread`.`iid` ";
 421                 } else {
 422                         $master_table = "`item`";
 423                         $master_table_key = "`item`.`id`";
 424                         $joins = '';
 425                 }
 426
 427                 $joins .= sprintf("STRAIGHT_JOIN `contact` ON `contact`.`id` = $master_table.`contact-id`
 428                         AND NOT `contact`.`blocked`
 429                         AND ((NOT `contact`.`readonly` AND NOT `contact`.`pending` AND (`contact`.`rel` IN (%s, %s)))
 430                         OR `contact`.`self` OR (`item`.`id` != `item`.`parent`) OR `contact`.`uid` = 0)
 431                         STRAIGHT_JOIN `contact` AS `author` ON `author`.`id` = $master_table.`author-id` AND NOT `author`.`blocked`
 432                         STRAIGHT_JOIN `contact` AS `owner` ON `owner`.`id` = $master_table.`owner-id` AND NOT `owner`.`blocked`
 433                         LEFT JOIN `user-item` ON `user-item`.`iid` = $master_table_key AND `user-item`.`uid` = %d",
 434                         CONTACT_IS_SHARING, CONTACT_IS_FRIEND, intval($uid));
 435
 436                 if (strpos($sql_commands, "`group_member`.") !== false) {
 437                         $joins .= " STRAIGHT_JOIN `group_member` ON `group_member`.`contact-id` = $master_table.`contact-id`";
 438                 }
 439
 440                 if (strpos($sql_commands, "`user`.") !== false) {
 441                         $joins .= " STRAIGHT_JOIN `user` ON `user`.`uid` = $master_table.`uid`";
 442                 }
 443
 444                 if (strpos($sql_commands, "`event`.") !== false) {
 445                         $joins .= " LEFT JOIN `event` ON `event-id` = `event`.`id`";
 446                 }
 447
 448                 if (strpos($sql_commands, "`sign`.") !== false) {
 449                         $joins .= " LEFT JOIN `sign` ON `sign`.`iid` = `item`.`id`";
 450                 }
 451
 452                 if ((strpos($sql_commands, "`parent-item`.") !== false) || (strpos($sql_commands, "`parent-author`.") !== false)) {
 453                         $joins .= " STRAIGHT_JOIN `item` AS `parent-item` ON `parent-item`.`id` = `item`.`parent`";
 454                 }
 455
 456                 if (strpos($sql_commands, "`parent-item-author`.") !== false) {
 457                         $joins .= " STRAIGHT_JOIN `contact` AS `parent-item-author` ON `parent-item-author`.`id` = `parent-item`.`author-id`";
 458                 }
 459
 460                 return $joins;
 461         }
 462
 463         /**
 464          * @brief Add the field list for the "select" functions
 465          *
 466          * @param array $fields The field definition array
 467          * @param array $selected The array with the selected fields from the "select" functions
 468          *
 469          * @return string The field list
 470          */
 471         private static function constructSelectFields($fields, $selected)
 472         {
 473                 $selection = [];
 474                 foreach ($fields as $table => $table_fields) {
 475                         foreach ($table_fields as $field => $select) {
 476                                 if (empty($selected) || in_array($select, $selected)) {
 477                                         if (is_int($field)) {
 478                                                 $selection[] = "`" . $table . "`.`".$select."`";
 479                                         } else {
 480                                                 $selection[] = "`" . $table . "`.`" . $field . "` AS `".$select ."`";
 481                                         }
 482                                 }
 483                         }
 484                 }
 485                 return implode(", ", $selection);
 486         }
 487
 488         /**
 489          * @brief add table definition to fields in an SQL query
 490          *
 491          * @param string $query SQL query
 492          * @param array $fields The field definition array
 493          *
 494          * @return string the changed SQL query
 495          */
 496         private static function addTablesToFields($query, $fields)
 497         {
 498                 foreach ($fields as $table => $table_fields) {
 499                         foreach ($table_fields as $alias => $field) {
 500                                 if (is_int($alias)) {
 501                                         $replace_field = $field;
 502                                 } else {
 503                                         $replace_field = $alias;
 504                                 }
 505
 506                                 $search = "/([^\.])`" . $field . "`/i";
 507                                 $replace = "$1`" . $table . "`.`" . $replace_field . "`";
 508                                 $query = preg_replace($search, $replace, $query);
 509                         }
 510                 }
 511                 return $query;
 512         }
 513
 514         /**
 515          * @brief Update existing item entries
 516          *
 517          * @param array $fields The fields that are to be changed
 518          * @param array $condition The condition for finding the item entries
 519          *
 520          * In the future we may have to change permissions as well.
 521          * Then we had to add the user id as third parameter.
 522          *
 523          * A return value of "0" doesn't mean an error - but that 0 rows had been changed.
 524          *
 525          * @return integer|boolean number of affected rows - or "false" if there was an error
 526          */
 527         public static function update(array $fields, array $condition)
 528         {
 529                 if (empty($condition) || empty($fields)) {
 530                         return false;
 531                 }
 532
 533                 // To ensure the data integrity we do it in an transaction
 534                 dba::transaction();
 535
 536                 // We cannot simply expand the condition to check for origin entries
 537                 // The condition needn't to be a simple array but could be a complex condition.
 538                 // And we have to execute this query before the update to ensure to fetch the same data.
 539                 $items = dba::select('item', ['id', 'origin'], $condition);
 540
 541                 $success = dba::update('item', $fields, $condition);
 542
 543                 if (!$success) {
 544                         dba::close($items);
 545                         dba::rollback();
 546                         return false;
 547                 }
 548
 549                 $rows = dba::affected_rows();
 550
 551                 while ($item = dba::fetch($items)) {
 552                         Term::insertFromTagFieldByItemId($item['id']);
 553                         Term::insertFromFileFieldByItemId($item['id']);
 554                         self::updateThread($item['id']);
 555
 556                         // We only need to notfiy others when it is an original entry from us.
 557                         // Only call the notifier when the item has some content relevant change.
 558                         if ($item['origin'] && in_array('edited', array_keys($fields))) {
 559                                 Worker::add(PRIORITY_HIGH, "Notifier", 'edit_post', $item['id']);
 560                         }
 561                 }
 562
 563                 dba::close($items);
 564                 dba::commit();
 565                 return $rows;
 566         }
 567
 568         /**
 569          * @brief Delete an item and notify others about it - if it was ours
 570          *
 571          * @param array $condition The condition for finding the item entries
 572          * @param integer $priority Priority for the notification
 573          */
 574         public static function delete($condition, $priority = PRIORITY_HIGH)
 575         {
 576                 $items = dba::select('item', ['id'], $condition);
 577                 while ($item = dba::fetch($items)) {
 578                         self::deleteById($item['id'], $priority);
 579                 }
 580                 dba::close($items);
 581         }
 582
 583         /**
 584          * @brief Delete an item for an user and notify others about it - if it was ours
 585          *
 586          * @param array $condition The condition for finding the item entries
 587          * @param integer $uid User who wants to delete this item
 588          */
 589         public static function deleteForUser($condition, $uid)
 590         {
 591                 if ($uid == 0) {
 592                         return;
 593                 }
 594
 595                 $items = dba::select('item', ['id', 'uid'], $condition);
 596                 while ($item = dba::fetch($items)) {
 597                         // "Deleting" global items just means hiding them
 598                         if ($item['uid'] == 0) {
 599                                 dba::update('user-item', ['hidden' => true], ['iid' => $item['id'], 'uid' => $uid], true);
 600                         } elseif ($item['uid'] == $uid) {
 601                                 self::deleteById($item['id'], PRIORITY_HIGH);
 602                         } else {
 603                                 logger('Wrong ownership. Not deleting item ' . $item['id']);
 604                         }
 605                 }
 606                 dba::close($items);
 607         }
 608
 609         /**
 610          * @brief Delete an item and notify others about it - if it was ours
 611          *
 612          * @param integer $item_id Item ID that should be delete
 613          * @param integer $priority Priority for the notification
 614          *
 615          * @return boolean success
 616          */
 617         private static function deleteById($item_id, $priority = PRIORITY_HIGH)
 618         {
 619                 // locate item to be deleted
 620                 $fields = ['id', 'uri', 'uid', 'parent', 'parent-uri', 'origin',
 621                         'deleted', 'file', 'resource-id', 'event-id', 'attach',
 622                         'verb', 'object-type', 'object', 'target', 'contact-id'];
 623                 $item = dba::selectFirst('item', $fields, ['id' => $item_id]);
 624                 if (!DBM::is_result($item)) {
 625                         logger('Item with ID ' . $item_id . " hasn't been found.", LOGGER_DEBUG);
 626                         return false;
 627                 }
 628
 629                 if ($item['deleted']) {
 630                         logger('Item with ID ' . $item_id . ' has already been deleted.', LOGGER_DEBUG);
 631                         return false;
 632                 }
 633
 634                 $parent = dba::selectFirst('item', ['origin'], ['id' => $item['parent']]);
 635                 if (!DBM::is_result($parent)) {
 636                         $parent = ['origin' => false];
 637                 }
 638
 639                 // clean up categories and tags so they don't end up as orphans
 640
 641                 $matches = false;
 642                 $cnt = preg_match_all('/<(.*?)>/', $item['file'], $matches, PREG_SET_ORDER);
 643                 if ($cnt) {
 644                         foreach ($matches as $mtch) {
 645                                 file_tag_unsave_file($item['uid'], $item['id'], $mtch[1],true);
 646                         }
 647                 }
 648
 649                 $matches = false;
 650
 651                 $cnt = preg_match_all('/\[(.*?)\]/', $item['file'], $matches, PREG_SET_ORDER);
 652                 if ($cnt) {
 653                         foreach ($matches as $mtch) {
 654                                 file_tag_unsave_file($item['uid'], $item['id'], $mtch[1],false);
 655                         }
 656                 }
 657
 658                 /*
 659                  * If item is a link to a photo resource, nuke all the associated photos
 660                  * (visitors will not have photo resources)
 661                  * This only applies to photos uploaded from the photos page. Photos inserted into a post do not
 662                  * generate a resource-id and therefore aren't intimately linked to the item.
 663                  */
 664                 if (strlen($item['resource-id'])) {
 665                         dba::delete('photo', ['resource-id' => $item['resource-id'], 'uid' => $item['uid']]);
 666                 }
 667
 668                 // If item is a link to an event, delete the event.
 669                 if (intval($item['event-id'])) {
 670                         Event::delete($item['event-id']);
 671                 }
 672
 673                 // If item has attachments, drop them
 674                 foreach (explode(", ", $item['attach']) as $attach) {
 675                         preg_match("|attach/(\d+)|", $attach, $matches);
 676                         dba::delete('attach', ['id' => $matches[1], 'uid' => $item['uid']]);
 677                 }
 678
 679                 // Delete tags that had been attached to other items
 680                 self::deleteTagsFromItem($item);
 681
 682                 // Set the item to "deleted"
 683                 dba::update('item', ['deleted' => true, 'title' => '', 'body' => '',
 684                                         'edited' => DateTimeFormat::utcNow(), 'changed' => DateTimeFormat::utcNow()],
 685                                 ['id' => $item['id']]);
 686
 687                 Term::insertFromTagFieldByItemId($item['id']);
 688                 Term::insertFromFileFieldByItemId($item['id']);
 689                 self::deleteThread($item['id'], $item['parent-uri']);
 690
 691                 if (!dba::exists('item', ["`uri` = ? AND `uid` != 0 AND NOT `deleted`", $item['uri']])) {
 692                         self::delete(['uri' => $item['uri'], 'uid' => 0, 'deleted' => false], $priority);
 693                 }
 694
 695                 // If it's the parent of a comment thread, kill all the kids
 696                 if ($item['id'] == $item['parent']) {
 697                         self::delete(['parent' => $item['parent'], 'deleted' => false], $priority);
 698                 }
 699
 700                 // Is it our comment and/or our thread?
 701                 if ($item['origin'] || $parent['origin']) {
 702
 703                         // When we delete the original post we will delete all existing copies on the server as well
 704                         self::delete(['uri' => $item['uri'], 'deleted' => false], $priority);
 705
 706                         // send the notification upstream/downstream
 707                         Worker::add(['priority' => $priority, 'dont_fork' => true], "Notifier", "drop", intval($item['id']));
 708                 } elseif ($item['uid'] != 0) {
 709
 710                         // When we delete just our local user copy of an item, we have to set a marker to hide it
 711                         $global_item = dba::selectFirst('item', ['id'], ['uri' => $item['uri'], 'uid' => 0, 'deleted' => false]);
 712                         if (DBM::is_result($global_item)) {
 713                                 dba::update('user-item', ['hidden' => true], ['iid' => $global_item['id'], 'uid' => $item['uid']], true);
 714                         }
 715                 }
 716
 717                 logger('Item with ID ' . $item_id . " has been deleted.", LOGGER_DEBUG);
 718
 719                 return true;
 720         }
 721
 722         private static function deleteTagsFromItem($item)
 723         {
 724                 if (($item["verb"] != ACTIVITY_TAG) || ($item["object-type"] != ACTIVITY_OBJ_TAGTERM)) {
 725                         return;
 726                 }
 727
 728                 $xo = XML::parseString($item["object"], false);
 729                 $xt = XML::parseString($item["target"], false);
 730
 731                 if ($xt->type != ACTIVITY_OBJ_NOTE) {
 732                         return;
 733                 }
 734
 735                 $i = dba::selectFirst('item', ['id', 'contact-id', 'tag'], ['uri' => $xt->id, 'uid' => $item['uid']]);
 736                 if (!DBM::is_result($i)) {
 737                         return;
 738                 }
 739
 740                 // For tags, the owner cannot remove the tag on the author's copy of the post.
 741                 $owner_remove = ($item["contact-id"] == $i["contact-id"]);
 742                 $author_copy = $item["origin"];
 743
 744                 if (($owner_remove && $author_copy) || !$owner_remove) {
 745                         return;
 746                 }
 747
 748                 $tags = explode(',', $i["tag"]);
 749                 $newtags = [];
 750                 if (count($tags)) {
 751                         foreach ($tags as $tag) {
 752                                 if (trim($tag) !== trim($xo->body)) {
 753                                        $newtags[] = trim($tag);
 754                                 }
 755                         }
 756                 }
 757                 self::update(['tag' => implode(',', $newtags)], ['id' => $i["id"]]);
 758         }
 759
 760         private static function guid($item, $notify)
 761         {
 762                 $guid = notags(trim($item['guid']));
 763
 764                 if (!empty($guid)) {
 765                         return $guid;
 766                 }
 767
 768                 if ($notify) {
 769                         // We have to avoid duplicates. So we create the GUID in form of a hash of the plink or uri.
 770                         // We add the hash of our own host because our host is the original creator of the post.
 771                         $prefix_host = get_app()->get_hostname();
 772                 } else {
 773                         $prefix_host = '';
 774
 775                         // We are only storing the post so we create a GUID from the original hostname.
 776                         if (!empty($item['author-link'])) {
 777                                 $parsed = parse_url($item['author-link']);
 778                                 if (!empty($parsed['host'])) {
 779                                         $prefix_host = $parsed['host'];
 780                                 }
 781                         }
 782
 783                         if (empty($prefix_host) && !empty($item['plink'])) {
 784                                 $parsed = parse_url($item['plink']);
 785                                 if (!empty($parsed['host'])) {
 786                                         $prefix_host = $parsed['host'];
 787                                 }
 788                         }
 789
 790                         if (empty($prefix_host) && !empty($item['uri'])) {
 791                                 $parsed = parse_url($item['uri']);
 792                                 if (!empty($parsed['host'])) {
 793                                         $prefix_host = $parsed['host'];
 794                                 }
 795                         }
 796
 797                         // Is it in the format data@host.tld? - Used for mail contacts
 798                         if (empty($prefix_host) && !empty($item['author-link']) && strstr($item['author-link'], '@')) {
 799                                 $mailparts = explode('@', $item['author-link']);
 800                                 $prefix_host = array_pop($mailparts);
 801                         }
 802                 }
 803
 804                 if (!empty($item['plink'])) {
 805                         $guid = self::guidFromUri($item['plink'], $prefix_host);
 806                 } elseif (!empty($item['uri'])) {
 807                         $guid = self::guidFromUri($item['uri'], $prefix_host);
 808                 } else {
 809                         $guid = get_guid(32, hash('crc32', $prefix_host));
 810                 }
 811
 812                 return $guid;
 813         }
 814
 815         private static function contactId($item)
 816         {
 817                 $contact_id = (int)$item["contact-id"];
 818
 819                 if (!empty($contact_id)) {
 820                         return $contact_id;
 821                 }
 822                 logger('Missing contact-id. Called by: '.System::callstack(), LOGGER_DEBUG);
 823                 /*
 824                  * First we are looking for a suitable contact that matches with the author of the post
 825                  * This is done only for comments
 826                  */
 827                 if ($item['parent-uri'] != $item['uri']) {
 828                         $contact_id = Contact::getIdForURL($item['author-link'], $item['uid']);
 829                 }
 830
 831                 // If not present then maybe the owner was found
 832                 if ($contact_id == 0) {
 833                         $contact_id = Contact::getIdForURL($item['owner-link'], $item['uid']);
 834                 }
 835
 836                 // Still missing? Then use the "self" contact of the current user
 837                 if ($contact_id == 0) {
 838                         $self = dba::selectFirst('contact', ['id'], ['self' => true, 'uid' => $item['uid']]);
 839                         if (DBM::is_result($self)) {
 840                                 $contact_id = $self["id"];
 841                         }
 842                 }
 843                 logger("Contact-id was missing for post ".$item['guid']." from user id ".$item['uid']." - now set to ".$contact_id, LOGGER_DEBUG);
 844
 845                 return $contact_id;
 846         }
 847
 848         public static function insert($item, $force_parent = false, $notify = false, $dontcache = false)
 849         {
 850                 $a = get_app();
 851
 852                 // If it is a posting where users should get notifications, then define it as wall posting
 853                 if ($notify) {
 854                         $item['wall'] = 1;
 855                         $item['type'] = 'wall';
 856                         $item['origin'] = 1;
 857                         $item['network'] = NETWORK_DFRN;
 858                         $item['protocol'] = PROTOCOL_DFRN;
 859
 860                         if (is_int($notify)) {
 861                                 $priority = $notify;
 862                         } else {
 863                                 $priority = PRIORITY_HIGH;
 864                         }
 865                 } else {
 866                         $item['network'] = trim(defaults($item, 'network', NETWORK_PHANTOM));
 867                 }
 868
 869                 $item['guid'] = self::guid($item, $notify);
 870                 $item['uri'] = notags(trim(defaults($item, 'uri', self::newURI($item['uid'], $item['guid']))));
 871
 872                 // Store conversation data
 873                 $item = Conversation::insert($item);
 874
 875                 /*
 876                  * If a Diaspora signature structure was passed in, pull it out of the
 877                  * item array and set it aside for later storage.
 878                  */
 879
 880                 $dsprsig = null;
 881                 if (x($item, 'dsprsig')) {
 882                         $encoded_signature = $item['dsprsig'];
 883                         $dsprsig = json_decode(base64_decode($item['dsprsig']));
 884                         unset($item['dsprsig']);
 885                 }
 886
 887                 if (!empty($item['diaspora_signed_text'])) {
 888                         $diaspora_signed_text = $item['diaspora_signed_text'];
 889                         unset($item['diaspora_signed_text']);
 890                 } else {
 891                         $diaspora_signed_text = '';
 892                 }
 893
 894                 // Converting the plink
 895                 /// @TODO Check if this is really still needed
 896                 if ($item['network'] == NETWORK_OSTATUS) {
 897                         if (isset($item['plink'])) {
 898                                 $item['plink'] = OStatus::convertHref($item['plink']);
 899                         } elseif (isset($item['uri'])) {
 900                                 $item['plink'] = OStatus::convertHref($item['uri']);
 901                         }
 902                 }
 903
 904                 if (!empty($item['thr-parent'])) {
 905                         $item['parent-uri'] = $item['thr-parent'];
 906                 }
 907
 908                 if (x($item, 'gravity')) {
 909                         $item['gravity'] = intval($item['gravity']);
 910                 } elseif ($item['parent-uri'] === $item['uri']) {
 911                         $item['gravity'] = 0;
 912                 } elseif (activity_match($item['verb'],ACTIVITY_POST)) {
 913                         $item['gravity'] = 6;
 914                 } else {
 915                         $item['gravity'] = 6;   // extensible catchall
 916                 }
 917
 918                 $item['type'] = defaults($item, 'type', 'remote');
 919
 920                 $uid = intval($item['uid']);
 921
 922                 // check for create date and expire time
 923                 $expire_interval = Config::get('system', 'dbclean-expire-days', 0);
 924
 925                 $user = dba::selectFirst('user', ['expire'], ['uid' => $uid]);
 926                 if (DBM::is_result($user) && ($user['expire'] > 0) && (($user['expire'] < $expire_interval) || ($expire_interval == 0))) {
 927                         $expire_interval = $user['expire'];
 928                 }
 929
 930                 if (($expire_interval > 0) && !empty($item['created'])) {
 931                         $expire_date = time() - ($expire_interval * 86400);
 932                         $created_date = strtotime($item['created']);
 933                         if ($created_date < $expire_date) {
 934                                 logger('item-store: item created ('.date('c', $created_date).') before expiration time ('.date('c', $expire_date).'). ignored. ' . print_r($item,true), LOGGER_DEBUG);
 935                                 return 0;
 936                         }
 937                 }
 938
 939                 /*
 940                  * Do we already have this item?
 941                  * We have to check several networks since Friendica posts could be repeated
 942                  * via OStatus (maybe Diasporsa as well)
 943                  */
 944                 if (in_array($item['network'], [NETWORK_DIASPORA, NETWORK_DFRN, NETWORK_OSTATUS, ""])) {
 945                         $condition = ["`uri` = ? AND `uid` = ? AND `network` IN (?, ?, ?)",
 946                                 trim($item['uri']), $item['uid'],
 947                                 NETWORK_DIASPORA, NETWORK_DFRN, NETWORK_OSTATUS];
 948                         $existing = dba::selectFirst('item', ['id', 'network'], $condition);
 949                         if (DBM::is_result($existing)) {
 950                                 // We only log the entries with a different user id than 0. Otherwise we would have too many false positives
 951                                 if ($uid != 0) {
 952                                         logger("Item with uri ".$item['uri']." already existed for user ".$uid." with id ".$existing["id"]." target network ".$existing["network"]." - new network: ".$item['network']);
 953                                 }
 954
 955                                 return $existing["id"];
 956                         }
 957                 }
 958
 959                 self::addLanguageInPostopts($item);
 960
 961                 $item['wall']          = intval(defaults($item, 'wall', 0));
 962                 $item['extid']         = trim(defaults($item, 'extid', ''));
 963                 $item['author-name']   = trim(defaults($item, 'author-name', ''));
 964                 $item['author-link']   = trim(defaults($item, 'author-link', ''));
 965                 $item['author-avatar'] = trim(defaults($item, 'author-avatar', ''));
 966                 $item['owner-name']    = trim(defaults($item, 'owner-name', ''));
 967                 $item['owner-link']    = trim(defaults($item, 'owner-link', ''));
 968                 $item['owner-avatar']  = trim(defaults($item, 'owner-avatar', ''));
 969                 $item['received']      = ((x($item, 'received') !== false) ? DateTimeFormat::utc($item['received']) : DateTimeFormat::utcNow());
 970                 $item['created']       = ((x($item, 'created') !== false) ? DateTimeFormat::utc($item['created']) : $item['received']);
 971                 $item['edited']        = ((x($item, 'edited') !== false) ? DateTimeFormat::utc($item['edited']) : $item['created']);
 972                 $item['changed']       = ((x($item, 'changed') !== false) ? DateTimeFormat::utc($item['changed']) : $item['created']);
 973                 $item['commented']     = ((x($item, 'commented') !== false) ? DateTimeFormat::utc($item['commented']) : $item['created']);
 974                 $item['title']         = trim(defaults($item, 'title', ''));
 975                 $item['location']      = trim(defaults($item, 'location', ''));
 976                 $item['coord']         = trim(defaults($item, 'coord', ''));
 977                 $item['visible']       = ((x($item, 'visible') !== false) ? intval($item['visible'])         : 1);
 978                 $item['deleted']       = 0;
 979                 $item['parent-uri']    = trim(defaults($item, 'parent-uri', $item['uri']));
 980                 $item['verb']          = trim(defaults($item, 'verb', ''));
 981                 $item['object-type']   = trim(defaults($item, 'object-type', ''));
 982                 $item['object']        = trim(defaults($item, 'object', ''));
 983                 $item['target-type']   = trim(defaults($item, 'target-type', ''));
 984                 $item['target']        = trim(defaults($item, 'target', ''));
 985                 $item['plink']         = trim(defaults($item, 'plink', ''));
 986                 $item['allow_cid']     = trim(defaults($item, 'allow_cid', ''));
 987                 $item['allow_gid']     = trim(defaults($item, 'allow_gid', ''));
 988                 $item['deny_cid']      = trim(defaults($item, 'deny_cid', ''));
 989                 $item['deny_gid']      = trim(defaults($item, 'deny_gid', ''));
 990                 $item['private']       = intval(defaults($item, 'private', 0));
 991                 $item['bookmark']      = intval(defaults($item, 'bookmark', 0));
 992                 $item['body']          = trim(defaults($item, 'body', ''));
 993                 $item['tag']           = trim(defaults($item, 'tag', ''));
 994                 $item['attach']        = trim(defaults($item, 'attach', ''));
 995                 $item['app']           = trim(defaults($item, 'app', ''));
 996                 $item['origin']        = intval(defaults($item, 'origin', 0));
 997                 $item['postopts']      = trim(defaults($item, 'postopts', ''));
 998                 $item['resource-id']   = trim(defaults($item, 'resource-id', ''));
 999                 $item['event-id']      = intval(defaults($item, 'event-id', 0));
1000                 $item['inform']        = trim(defaults($item, 'inform', ''));
1001                 $item['file']          = trim(defaults($item, 'file', ''));
1002
1003                 // When there is no content then we don't post it
1004                 if ($item['body'].$item['title'] == '') {
1005                         return 0;
1006                 }
1007
1008                 // Items cannot be stored before they happen ...
1009                 if ($item['created'] > DateTimeFormat::utcNow()) {
1010                         $item['created'] = DateTimeFormat::utcNow();
1011                 }
1012
1013                 // We haven't invented time travel by now.
1014                 if ($item['edited'] > DateTimeFormat::utcNow()) {
1015                         $item['edited'] = DateTimeFormat::utcNow();
1016                 }
1017
1018                 if (($item['author-link'] == "") && ($item['owner-link'] == "")) {
1019                         logger("Both author-link and owner-link are empty. Called by: " . System::callstack(), LOGGER_DEBUG);
1020                 }
1021
1022                 $item['plink'] = defaults($item, 'plink', System::baseUrl() . '/display/' . urlencode($item['guid']));
1023
1024                 // The contact-id should be set before "self::insert" was called - but there seems to be issues sometimes
1025                 $item["contact-id"] = self::contactId($item);
1026
1027                 $default = ['url' => $item['author-link'], 'name' => $item['author-name'],
1028                         'photo' => $item['author-avatar'], 'network' => $item['network']];
1029
1030                 $item['author-id'] = defaults($item, 'author-id', Contact::getIdForURL($item["author-link"], 0, false, $default));
1031
1032                 if (Contact::isBlocked($item["author-id"])) {
1033                         logger('Contact '.$item["author-id"].' is blocked, item '.$item["uri"].' will not be stored');
1034                         return 0;
1035                 }
1036
1037                 $default = ['url' => $item['owner-link'], 'name' => $item['owner-name'],
1038                         'photo' => $item['owner-avatar'], 'network' => $item['network']];
1039
1040                 $item['owner-id'] = defaults($item, 'owner-id', Contact::getIdForURL($item["owner-link"], 0, false, $default));
1041
1042                 if (Contact::isBlocked($item["owner-id"])) {
1043                         logger('Contact '.$item["owner-id"].' is blocked, item '.$item["uri"].' will not be stored');
1044                         return 0;
1045                 }
1046
1047                 //unset($item['author-link']);
1048                 unset($item['author-name']);
1049                 unset($item['author-avatar']);
1050
1051                 //unset($item['owner-link']);
1052                 unset($item['owner-name']);
1053                 unset($item['owner-avatar']);
1054
1055                 if ($item['network'] == NETWORK_PHANTOM) {
1056                         logger('Missing network. Called by: '.System::callstack(), LOGGER_DEBUG);
1057
1058                         $contact = Contact::getDetailsByURL($item['author-link'], $item['uid']);
1059                         if (!empty($contact['network'])) {
1060                                 $item['network'] = $contact["network"];
1061                         } else {
1062                                 $item['network'] = NETWORK_DFRN;
1063                         }
1064                         logger("Set network to " . $item["network"] . " for " . $item["uri"], LOGGER_DEBUG);
1065                 }
1066
1067                 // Checking if there is already an item with the same guid
1068                 logger('Checking for an item for user '.$item['uid'].' on network '.$item['network'].' with the guid '.$item['guid'], LOGGER_DEBUG);
1069                 $condition = ['guid' => $item['guid'], 'network' => $item['network'], 'uid' => $item['uid']];
1070                 if (dba::exists('item', $condition)) {
1071                         logger('found item with guid '.$item['guid'].' for user '.$item['uid'].' on network '.$item['network'], LOGGER_DEBUG);
1072                         return 0;
1073                 }
1074
1075                 // Check for hashtags in the body and repair or add hashtag links
1076                 self::setHashtags($item);
1077
1078                 $item['thr-parent'] = $item['parent-uri'];
1079
1080                 $notify_type = '';
1081                 $allow_cid = '';
1082                 $allow_gid = '';
1083                 $deny_cid  = '';
1084                 $deny_gid  = '';
1085
1086                 if ($item['parent-uri'] === $item['uri']) {
1087                         $parent_id = 0;
1088                         $parent_deleted = 0;
1089                         $allow_cid = $item['allow_cid'];
1090                         $allow_gid = $item['allow_gid'];
1091                         $deny_cid  = $item['deny_cid'];
1092                         $deny_gid  = $item['deny_gid'];
1093                         $notify_type = 'wall-new';
1094                 } else {
1095                         // find the parent and snarf the item id and ACLs
1096                         // and anything else we need to inherit
1097
1098                         $fields = ['uri', 'parent-uri', 'id', 'deleted',
1099                                 'allow_cid', 'allow_gid', 'deny_cid', 'deny_gid',
1100                                 'wall', 'private', 'forum_mode', 'origin'];
1101                         $condition = ['uri' => $item['parent-uri'], 'uid' => $item['uid']];
1102                         $params = ['order' => ['id' => false]];
1103                         $parent = dba::selectFirst('item', $fields, $condition, $params);
1104
1105                         if (DBM::is_result($parent)) {
1106                                 // is the new message multi-level threaded?
1107                                 // even though we don't support it now, preserve the info
1108                                 // and re-attach to the conversation parent.
1109
1110                                 if ($parent['uri'] != $parent['parent-uri']) {
1111                                         $item['parent-uri'] = $parent['parent-uri'];
1112
1113                                         $condition = ['uri' => $item['parent-uri'],
1114                                                 'parent-uri' => $item['parent-uri'],
1115                                                 'uid' => $item['uid']];
1116                                         $params = ['order' => ['id' => false]];
1117                                         $toplevel_parent = dba::selectFirst('item', $fields, $condition, $params);
1118
1119                                         if (DBM::is_result($toplevel_parent)) {
1120                                                 $parent = $toplevel_parent;
1121                                         }
1122                                 }
1123
1124                                 $parent_id      = $parent['id'];
1125                                 $parent_deleted = $parent['deleted'];
1126                                 $allow_cid      = $parent['allow_cid'];
1127                                 $allow_gid      = $parent['allow_gid'];
1128                                 $deny_cid       = $parent['deny_cid'];
1129                                 $deny_gid       = $parent['deny_gid'];
1130                                 $item['wall']    = $parent['wall'];
1131                                 $notify_type    = 'comment-new';
1132
1133                                 /*
1134                                  * If the parent is private, force privacy for the entire conversation
1135                                  * This differs from the above settings as it subtly allows comments from
1136                                  * email correspondents to be private even if the overall thread is not.
1137                                  */
1138                                 if ($parent['private']) {
1139                                         $item['private'] = $parent['private'];
1140                                 }
1141
1142                                 /*
1143                                  * Edge case. We host a public forum that was originally posted to privately.
1144                                  * The original author commented, but as this is a comment, the permissions
1145                                  * weren't fixed up so it will still show the comment as private unless we fix it here.
1146                                  */
1147                                 if ((intval($parent['forum_mode']) == 1) && $parent['private']) {
1148                                         $item['private'] = 0;
1149                                 }
1150
1151                                 // If its a post from myself then tag the thread as "mention"
1152                                 logger("Checking if parent ".$parent_id." has to be tagged as mention for user ".$item['uid'], LOGGER_DEBUG);
1153                                 $user = dba::selectFirst('user', ['nickname'], ['uid' => $item['uid']]);
1154                                 if (DBM::is_result($user)) {
1155                                         $self = normalise_link(System::baseUrl() . '/profile/' . $user['nickname']);
1156                                         $self_id = Contact::getIdForURL($self, 0, true);
1157                                         logger("'myself' is ".$self_id." for parent ".$parent_id." checking against ".$item['author-id']." and ".$item['owner-id'], LOGGER_DEBUG);
1158                                         if (($item['author-id'] == $self_id) || ($item['owner-id'] == $self_id)) {
1159                                                 dba::update('thread', ['mention' => true], ['iid' => $parent_id]);
1160                                                 logger("tagged thread ".$parent_id." as mention for user ".$self, LOGGER_DEBUG);
1161                                         }
1162                                 }
1163                         } else {
1164                                 /*
1165                                  * Allow one to see reply tweets from status.net even when
1166                                  * we don't have or can't see the original post.
1167                                  */
1168                                 if ($force_parent) {
1169                                         logger('$force_parent=true, reply converted to top-level post.');
1170                                         $parent_id = 0;
1171                                         $item['parent-uri'] = $item['uri'];
1172                                         $item['gravity'] = 0;
1173                                 } else {
1174                                         logger('item parent '.$item['parent-uri'].' for '.$item['uid'].' was not found - ignoring item');
1175                                         return 0;
1176                                 }
1177
1178                                 $parent_deleted = 0;
1179                         }
1180                 }
1181
1182                 $condition = ["`uri` = ? AND `network` IN (?, ?) AND `uid` = ?",
1183                         $item['uri'], $item['network'], NETWORK_DFRN, $item['uid']];
1184                 if (dba::exists('item', $condition)) {
1185                         logger('duplicated item with the same uri found. '.print_r($item,true));
1186                         return 0;
1187                 }
1188
1189                 // On Friendica and Diaspora the GUID is unique
1190                 if (in_array($item['network'], [NETWORK_DFRN, NETWORK_DIASPORA])) {
1191                         $condition = ['guid' => $item['guid'], 'uid' => $item['uid']];
1192                         if (dba::exists('item', $condition)) {
1193                                 logger('duplicated item with the same guid found. '.print_r($item,true));
1194                                 return 0;
1195                         }
1196                 } else {
1197                         // Check for an existing post with the same content. There seems to be a problem with OStatus.
1198                         $condition = ["`body` = ? AND `network` = ? AND `created` = ? AND `contact-id` = ? AND `uid` = ?",
1199                                         $item['body'], $item['network'], $item['created'], $item['contact-id'], $item['uid']];
1200                         if (dba::exists('item', $condition)) {
1201                                 logger('duplicated item with the same body found. '.print_r($item,true));
1202                                 return 0;
1203                         }
1204                 }
1205
1206                 // Is this item available in the global items (with uid=0)?
1207                 if ($item["uid"] == 0) {
1208                         $item["global"] = true;
1209
1210                         // Set the global flag on all items if this was a global item entry
1211                         dba::update('item', ['global' => true], ['uri' => $item["uri"]]);
1212                 } else {
1213                         $item["global"] = dba::exists('item', ['uid' => 0, 'uri' => $item["uri"]]);
1214                 }
1215
1216                 // ACL settings
1217                 if (strlen($allow_cid) || strlen($allow_gid) || strlen($deny_cid) || strlen($deny_gid)) {
1218                         $private = 1;
1219                 } else {
1220                         $private = $item['private'];
1221                 }
1222
1223                 $item["allow_cid"] = $allow_cid;
1224                 $item["allow_gid"] = $allow_gid;
1225                 $item["deny_cid"] = $deny_cid;
1226                 $item["deny_gid"] = $deny_gid;
1227                 $item["private"] = $private;
1228                 $item["deleted"] = $parent_deleted;
1229
1230                 // Fill the cache field
1231                 put_item_in_cache($item);
1232
1233                 if ($notify) {
1234                         Addon::callHooks('post_local', $item);
1235                 } else {
1236                         Addon::callHooks('post_remote', $item);
1237                 }
1238
1239                 // This array field is used to trigger some automatic reactions
1240                 // It is mainly used in the "post_local" hook.
1241                 unset($item['api_source']);
1242
1243                 if (x($item, 'cancel')) {
1244                         logger('post cancelled by addon.');
1245                         return 0;
1246                 }
1247
1248                 /*
1249                  * Check for already added items.
1250                  * There is a timing issue here that sometimes creates double postings.
1251                  * An unique index would help - but the limitations of MySQL (maximum size of index values) prevent this.
1252                  */
1253                 if ($item["uid"] == 0) {
1254                         if (dba::exists('item', ['uri' => trim($item['uri']), 'uid' => 0])) {
1255                                 logger('Global item already stored. URI: '.$item['uri'].' on network '.$item['network'], LOGGER_DEBUG);
1256                                 return 0;
1257                         }
1258                 }
1259
1260                 logger('' . print_r($item,true), LOGGER_DATA);
1261
1262                 dba::transaction();
1263                 $ret = dba::insert('item', $item);
1264
1265                 // When the item was successfully stored we fetch the ID of the item.
1266                 if (DBM::is_result($ret)) {
1267                         $current_post = dba::lastInsertId();
1268                 } else {
1269                         // This can happen - for example - if there are locking timeouts.
1270                         dba::rollback();
1271
1272                         // Store the data into a spool file so that we can try again later.
1273
1274                         // At first we restore the Diaspora signature that we removed above.
1275                         if (isset($encoded_signature)) {
1276                                 $item['dsprsig'] = $encoded_signature;
1277                         }
1278
1279                         // Now we store the data in the spool directory
1280                         // We use "microtime" to keep the arrival order and "mt_rand" to avoid duplicates
1281                         $file = 'item-'.round(microtime(true) * 10000).'-'.mt_rand().'.msg';
1282
1283                         $spoolpath = get_spoolpath();
1284                         if ($spoolpath != "") {
1285                                 $spool = $spoolpath.'/'.$file;
1286                                 file_put_contents($spool, json_encode($item));
1287                                 logger("Item wasn't stored - Item was spooled into file ".$file, LOGGER_DEBUG);
1288                         }
1289                         return 0;
1290                 }
1291
1292                 if ($current_post == 0) {
1293                         // This is one of these error messages that never should occur.
1294                         logger("couldn't find created item - we better quit now.");
1295                         dba::rollback();
1296                         return 0;
1297                 }
1298
1299                 // How much entries have we created?
1300                 // We wouldn't need this query when we could use an unique index - but MySQL has length problems with them.
1301                 $entries = dba::count('item', ['uri' => $item['uri'], 'uid' => $item['uid'], 'network' => $item['network']]);
1302
1303                 if ($entries > 1) {
1304                         // There are duplicates. We delete our just created entry.
1305                         logger('Duplicated post occurred. uri = ' . $item['uri'] . ' uid = ' . $item['uid']);
1306
1307                         // Yes, we could do a rollback here - but we are having many users with MyISAM.
1308                         dba::delete('item', ['id' => $current_post]);
1309                         dba::commit();
1310                         return 0;
1311                 } elseif ($entries == 0) {
1312                         // This really should never happen since we quit earlier if there were problems.
1313                         logger("Something is terribly wrong. We haven't found our created entry.");
1314                         dba::rollback();
1315                         return 0;
1316                 }
1317
1318                 logger('created item '.$current_post);
1319                 self::updateContact($item);
1320
1321                 if (!$parent_id || ($item['parent-uri'] === $item['uri'])) {
1322                         $parent_id = $current_post;
1323                 }
1324
1325                 // Set parent id
1326                 dba::update('item', ['parent' => $parent_id], ['id' => $current_post]);
1327
1328                 $item['id'] = $current_post;
1329                 $item['parent'] = $parent_id;
1330
1331                 // update the commented timestamp on the parent
1332                 // Only update "commented" if it is really a comment
1333                 if (($item['verb'] == ACTIVITY_POST) || !Config::get("system", "like_no_comment")) {
1334                         dba::update('item', ['commented' => DateTimeFormat::utcNow(), 'changed' => DateTimeFormat::utcNow()], ['id' => $parent_id]);
1335                 } else {
1336                         dba::update('item', ['changed' => DateTimeFormat::utcNow()], ['id' => $parent_id]);
1337                 }
1338
1339                 if ($dsprsig) {
1340                         /*
1341                          * Friendica servers lower than 3.4.3-2 had double encoded the signature ...
1342                          * We can check for this condition when we decode and encode the stuff again.
1343                          */
1344                         if (base64_encode(base64_decode(base64_decode($dsprsig->signature))) == base64_decode($dsprsig->signature)) {
1345                                 $dsprsig->signature = base64_decode($dsprsig->signature);
1346                                 logger("Repaired double encoded signature from handle ".$dsprsig->signer, LOGGER_DEBUG);
1347                         }
1348
1349                         dba::insert('sign', ['iid' => $current_post, 'signed_text' => $dsprsig->signed_text,
1350                                                 'signature' => $dsprsig->signature, 'signer' => $dsprsig->signer]);
1351                 }
1352
1353                 if (!empty($diaspora_signed_text)) {
1354                         // Formerly we stored the signed text, the signature and the author in different fields.
1355                         // We now store the raw data so that we are more flexible.
1356                         dba::insert('sign', ['iid' => $current_post, 'signed_text' => $diaspora_signed_text]);
1357                 }
1358
1359                 $deleted = self::tagDeliver($item['uid'], $current_post);
1360
1361                 /*
1362                  * current post can be deleted if is for a community page and no mention are
1363                  * in it.
1364                  */
1365                 if (!$deleted && !$dontcache) {
1366                         $posted_item = dba::selectFirst('item', [], ['id' => $current_post]);
1367                         if (DBM::is_result($posted_item)) {
1368                                 if ($notify) {
1369                                         Addon::callHooks('post_local_end', $posted_item);
1370                                 } else {
1371                                         Addon::callHooks('post_remote_end', $posted_item);
1372                                 }
1373                         } else {
1374                                 logger('new item not found in DB, id ' . $current_post);
1375                         }
1376                 }
1377
1378                 if ($item['parent-uri'] === $item['uri']) {
1379                         self::addThread($current_post);
1380                 } else {
1381                         self::updateThread($parent_id);
1382                 }
1383
1384                 dba::commit();
1385
1386                 /*
1387                  * Due to deadlock issues with the "term" table we are doing these steps after the commit.
1388                  * This is not perfect - but a workable solution until we found the reason for the problem.
1389                  */
1390                 Term::insertFromTagFieldByItemId($current_post);
1391                 Term::insertFromFileFieldByItemId($current_post);
1392
1393                 if ($item['parent-uri'] === $item['uri']) {
1394                         self::addShadow($current_post);
1395                 } else {
1396                         self::addShadowPost($current_post);
1397                 }
1398
1399                 check_user_notification($current_post);
1400
1401                 if ($notify) {
1402                         Worker::add(['priority' => $priority, 'dont_fork' => true], "Notifier", $notify_type, $current_post);
1403                 } elseif (!empty($parent) && $parent['origin']) {
1404                         Worker::add(['priority' => PRIORITY_HIGH, 'dont_fork' => true], "Notifier", "comment-import", $current_post);
1405                 }
1406
1407                 return $current_post;
1408         }
1409
1410         /**
1411          * @brief Distributes public items to the receivers
1412          *
1413          * @param integer $itemid      Item ID that should be added
1414          * @param string  $signed_text Original text (for Diaspora signatures), JSON encoded.
1415          */
1416         public static function distribute($itemid, $signed_text = '')
1417         {
1418                 $condition = ["`id` IN (SELECT `parent` FROM `item` WHERE `id` = ?)", $itemid];
1419                 $parent = dba::selectFirst('item', ['owner-id'], $condition);
1420                 if (!DBM::is_result($parent)) {
1421                         return;
1422                 }
1423
1424                 // Only distribute public items from native networks
1425                 $condition = ['id' => $itemid, 'uid' => 0,
1426                         'network' => [NETWORK_DFRN, NETWORK_DIASPORA, NETWORK_OSTATUS, ""],
1427                         'visible' => true, 'deleted' => false, 'moderated' => false, 'private' => false];
1428                 $item = dba::selectFirst('item', [], ['id' => $itemid]);
1429                 if (!DBM::is_result($item)) {
1430                         return;
1431                 }
1432
1433                 unset($item['id']);
1434                 unset($item['parent']);
1435                 unset($item['mention']);
1436                 unset($item['wall']);
1437                 unset($item['origin']);
1438                 unset($item['starred']);
1439                 unset($item['rendered-hash']);
1440                 unset($item['rendered-html']);
1441
1442                 $users = [];
1443
1444                 $condition = ["`nurl` IN (SELECT `nurl` FROM `contact` WHERE `id` = ?) AND `uid` != 0 AND NOT `blocked` AND `rel` IN (?, ?)",
1445                         $parent['owner-id'], CONTACT_IS_SHARING,  CONTACT_IS_FRIEND];
1446                 $contacts = dba::select('contact', ['uid'], $condition);
1447                 while ($contact = dba::fetch($contacts)) {
1448                         $users[$contact['uid']] = $contact['uid'];
1449                 }
1450
1451                 $origin_uid = 0;
1452
1453                 if ($item['uri'] != $item['parent-uri']) {
1454                         $parents = dba::select('item', ['uid', 'origin'], ["`uri` = ? AND `uid` != 0", $item['parent-uri']]);
1455                         while ($parent = dba::fetch($parents)) {
1456                                 $users[$parent['uid']] = $parent['uid'];
1457                                 if ($parent['origin'] && !$item['origin']) {
1458                                         $origin_uid = $parent['uid'];
1459                                 }
1460                         }
1461                 }
1462
1463                 foreach ($users as $uid) {
1464                         if ($origin_uid == $uid) {
1465                                 $item['diaspora_signed_text'] = $signed_text;
1466                         }
1467                         self::storeForUser($itemid, $item, $uid);
1468                 }
1469         }
1470
1471         /**
1472          * @brief Store public items for the receivers
1473          *
1474          * @param integer $itemid Item ID that should be added
1475          * @param array   $item   The item entry that will be stored
1476          * @param integer $uid    The user that will receive the item entry
1477          */
1478         private static function storeForUser($itemid, $item, $uid)
1479         {
1480                 $item['uid'] = $uid;
1481                 $item['origin'] = 0;
1482                 $item['wall'] = 0;
1483                 if ($item['uri'] == $item['parent-uri']) {
1484                         $item['contact-id'] = Contact::getIdForURL($item['owner-link'], $uid);
1485                 } else {
1486                         $item['contact-id'] = Contact::getIdForURL($item['author-link'], $uid);
1487                 }
1488
1489                 if (empty($item['contact-id'])) {
1490                         $self = dba::selectFirst('contact', ['id'], ['self' => true, 'uid' => $uid]);
1491                         if (!DBM::is_result($self)) {
1492                                 return;
1493                         }
1494                         $item['contact-id'] = $self['id'];
1495                 }
1496
1497                 if (in_array($item['type'], ["net-comment", "wall-comment"])) {
1498                         $item['type'] = 'remote-comment';
1499                 } elseif ($item['type'] == 'wall') {
1500                         $item['type'] = 'remote';
1501                 }
1502
1503                 /// @todo Handling of "event-id"
1504
1505                 $notify = false;
1506                 if ($item['uri'] == $item['parent-uri']) {
1507                         $contact = dba::selectFirst('contact', [], ['id' => $item['contact-id'], 'self' => false]);
1508                         if (DBM::is_result($contact)) {
1509                                 $notify = self::isRemoteSelf($contact, $item);
1510                         }
1511                 }
1512
1513                 $distributed = self::insert($item, false, $notify, true);
1514
1515                 if (!$distributed) {
1516                         logger("Distributed public item " . $itemid . " for user " . $uid . " wasn't stored", LOGGER_DEBUG);
1517                 } else {
1518                         logger("Distributed public item " . $itemid . " for user " . $uid . " with id " . $distributed, LOGGER_DEBUG);
1519                 }
1520         }
1521
1522         /**
1523          * @brief Add a shadow entry for a given item id that is a thread starter
1524          *
1525          * We store every public item entry additionally with the user id "0".
1526          * This is used for the community page and for the search.
1527          * It is planned that in the future we will store public item entries only once.
1528          *
1529          * @param integer $itemid Item ID that should be added
1530          */
1531         public static function addShadow($itemid)
1532         {
1533                 $fields = ['uid', 'private', 'moderated', 'visible', 'deleted', 'network'];
1534                 $condition = ['id' => $itemid, 'parent' => [0, $itemid]];
1535                 $item = dba::selectFirst('item', $fields, $condition);
1536
1537                 if (!DBM::is_result($item)) {
1538                         return;
1539                 }
1540
1541                 // is it already a copy?
1542                 if (($itemid == 0) || ($item['uid'] == 0)) {
1543                         return;
1544                 }
1545
1546                 // Is it a visible public post?
1547                 if (!$item["visible"] || $item["deleted"] || $item["moderated"] || $item["private"]) {
1548                         return;
1549                 }
1550
1551                 // is it an entry from a connector? Only add an entry for natively connected networks
1552                 if (!in_array($item["network"], [NETWORK_DFRN, NETWORK_DIASPORA, NETWORK_OSTATUS, ""])) {
1553                         return;
1554                 }
1555
1556                 $item = dba::selectFirst('item', [], ['id' => $itemid]);
1557
1558                 if (DBM::is_result($item) && ($item["allow_cid"] == '') && ($item["allow_gid"] == '') &&
1559                         ($item["deny_cid"] == '') && ($item["deny_gid"] == '')) {
1560
1561                         if (!dba::exists('item', ['uri' => $item['uri'], 'uid' => 0])) {
1562                                 // Preparing public shadow (removing user specific data)
1563                                 $item['uid'] = 0;
1564                                 unset($item['id']);
1565                                 unset($item['parent']);
1566                                 unset($item['wall']);
1567                                 unset($item['mention']);
1568                                 unset($item['origin']);
1569                                 unset($item['starred']);
1570                                 unset($item['rendered-hash']);
1571                                 unset($item['rendered-html']);
1572                                 if ($item['uri'] == $item['parent-uri']) {
1573                                         $item['contact-id'] = Contact::getIdForURL($item['owner-link']);
1574                                 } else {
1575                                         $item['contact-id'] = Contact::getIdForURL($item['author-link']);
1576                                 }
1577
1578                                 if (in_array($item['type'], ["net-comment", "wall-comment"])) {
1579                                         $item['type'] = 'remote-comment';
1580                                 } elseif ($item['type'] == 'wall') {
1581                                         $item['type'] = 'remote';
1582                                 }
1583
1584                                 $public_shadow = self::insert($item, false, false, true);
1585
1586                                 logger("Stored public shadow for thread ".$itemid." under id ".$public_shadow, LOGGER_DEBUG);
1587                         }
1588                 }
1589         }
1590
1591         /**
1592          * @brief Add a shadow entry for a given item id that is a comment
1593          *
1594          * This function does the same like the function above - but for comments
1595          *
1596          * @param integer $itemid Item ID that should be added
1597          */
1598         public static function addShadowPost($itemid)
1599         {
1600                 $item = dba::selectFirst('item', [], ['id' => $itemid]);
1601                 if (!DBM::is_result($item)) {
1602                         return;
1603                 }
1604
1605                 // Is it a toplevel post?
1606                 if ($item['id'] == $item['parent']) {
1607                         self::addShadow($itemid);
1608                         return;
1609                 }
1610
1611                 // Is this a shadow entry?
1612                 if ($item['uid'] == 0) {
1613                         return;
1614                 }
1615
1616                 // Is there a shadow parent?
1617                 if (!dba::exists('item', ['uri' => $item['parent-uri'], 'uid' => 0])) {
1618                         return;
1619                 }
1620
1621                 // Is there already a shadow entry?
1622                 if (dba::exists('item', ['uri' => $item['uri'], 'uid' => 0])) {
1623                         return;
1624                 }
1625
1626                 // Save "origin" and "parent" state
1627                 $origin = $item['origin'];
1628                 $parent = $item['parent'];
1629
1630                 // Preparing public shadow (removing user specific data)
1631                 $item['uid'] = 0;
1632                 unset($item['id']);
1633                 unset($item['parent']);
1634                 unset($item['wall']);
1635                 unset($item['mention']);
1636                 unset($item['origin']);
1637                 unset($item['starred']);
1638                 unset($item['rendered-hash']);
1639                 unset($item['rendered-html']);
1640                 $item['contact-id'] = Contact::getIdForURL($item['author-link']);
1641
1642                 if (in_array($item['type'], ["net-comment", "wall-comment"])) {
1643                         $item['type'] = 'remote-comment';
1644                 } elseif ($item['type'] == 'wall') {
1645                         $item['type'] = 'remote';
1646                 }
1647
1648                 $public_shadow = self::insert($item, false, false, true);
1649
1650                 logger("Stored public shadow for comment ".$item['uri']." under id ".$public_shadow, LOGGER_DEBUG);
1651
1652                 // If this was a comment to a Diaspora post we don't get our comment back.
1653                 // This means that we have to distribute the comment by ourselves.
1654                 if ($origin && dba::exists('item', ['id' => $parent, 'network' => NETWORK_DIASPORA])) {
1655                         self::distribute($public_shadow);
1656                 }
1657         }
1658
1659          /**
1660          * Adds a "lang" specification in a "postopts" element of given $arr,
1661          * if possible and not already present.
1662          * Expects "body" element to exist in $arr.
1663          */
1664         private static function addLanguageInPostopts(&$item)
1665         {
1666                 $postopts = "";
1667
1668                 if (!empty($item['postopts'])) {
1669                         if (strstr($item['postopts'], 'lang=')) {
1670                                 // do not override
1671                                 return;
1672                         }
1673                         $postopts = $item['postopts'];
1674                 }
1675
1676                 $naked_body = Text\BBCode::toPlaintext($item['body'], false);
1677
1678                 $languages = (new Text_LanguageDetect())->detect($naked_body, 3);
1679
1680                 if (sizeof($languages) > 0) {
1681                         if ($postopts != '') {
1682                                 $postopts .= '&'; // arbitrary separator, to be reviewed
1683                         }
1684
1685                         $postopts .= 'lang=';
1686                         $sep = "";
1687
1688                         foreach ($languages as $language => $score) {
1689                                 $postopts .= $sep . $language . ";" . $score;
1690                                 $sep = ':';
1691                         }
1692                         $item['postopts'] = $postopts;
1693                 }
1694         }
1695
1696         /**
1697          * @brief Creates an unique guid out of a given uri
1698          *
1699          * @param string $uri uri of an item entry
1700          * @param string $host hostname for the GUID prefix
1701          * @return string unique guid
1702          */
1703         public static function guidFromUri($uri, $host)
1704         {
1705                 // Our regular guid routine is using this kind of prefix as well
1706                 // We have to avoid that different routines could accidentally create the same value
1707                 $parsed = parse_url($uri);
1708
1709                 // We use a hash of the hostname as prefix for the guid
1710                 $guid_prefix = hash("crc32", $host);
1711
1712                 // Remove the scheme to make sure that "https" and "http" doesn't make a difference
1713                 unset($parsed["scheme"]);
1714
1715                 // Glue it together to be able to make a hash from it
1716                 $host_id = implode("/", $parsed);
1717
1718                 // We could use any hash algorithm since it isn't a security issue
1719                 $host_hash = hash("ripemd128", $host_id);
1720
1721                 return $guid_prefix.$host_hash;
1722         }
1723
1724         /**
1725          * generate an unique URI
1726          *
1727          * @param integer $uid User id
1728          * @param string $guid An existing GUID (Otherwise it will be generated)
1729          *
1730          * @return string
1731          */
1732         public static function newURI($uid, $guid = "")
1733         {
1734                 if ($guid == "") {
1735                         $guid = get_guid(32);
1736                 }
1737
1738                 $hostname = self::getApp()->get_hostname();
1739
1740                 $user = dba::selectFirst('user', ['nickname'], ['uid' => $uid]);
1741
1742                 $uri = "urn:X-dfrn:" . $hostname . ':' . $user['nickname'] . ':' . $guid;
1743
1744                 return $uri;
1745         }
1746
1747         /**
1748          * @brief Set "success_update" and "last-item" to the date of the last time we heard from this contact
1749          *
1750          * This can be used to filter for inactive contacts.
1751          * Only do this for public postings to avoid privacy problems, since poco data is public.
1752          * Don't set this value if it isn't from the owner (could be an author that we don't know)
1753          *
1754          * @param array $arr Contains the just posted item record
1755          */
1756         private static function updateContact($arr)
1757         {
1758                 // Unarchive the author
1759                 $contact = dba::selectFirst('contact', [], ['id' => $arr["author-id"]]);
1760                 if (DBM::is_result($contact)) {
1761                         Contact::unmarkForArchival($contact);
1762                 }
1763
1764                 // Unarchive the contact if it's not our own contact
1765                 $contact = dba::selectFirst('contact', [], ['id' => $arr["contact-id"], 'self' => false]);
1766                 if (DBM::is_result($contact)) {
1767                         Contact::unmarkForArchival($contact);
1768                 }
1769
1770                 $update = (!$arr['private'] && (($arr["author-link"] === $arr["owner-link"]) || ($arr["parent-uri"] === $arr["uri"])));
1771
1772                 // Is it a forum? Then we don't care about the rules from above
1773                 if (!$update && ($arr["network"] == NETWORK_DFRN) && ($arr["parent-uri"] === $arr["uri"])) {
1774                         if (dba::exists('contact', ['id' => $arr['contact-id'], 'forum' => true])) {
1775                                 $update = true;
1776                         }
1777                 }
1778
1779                 if ($update) {
1780                         dba::update('contact', ['success_update' => $arr['received'], 'last-item' => $arr['received']],
1781                                 ['id' => $arr['contact-id']]);
1782                 }
1783                 // Now do the same for the system wide contacts with uid=0
1784                 if (!$arr['private']) {
1785                         dba::update('contact', ['success_update' => $arr['received'], 'last-item' => $arr['received']],
1786                                 ['id' => $arr['owner-id']]);
1787
1788                         if ($arr['owner-id'] != $arr['author-id']) {
1789                                 dba::update('contact', ['success_update' => $arr['received'], 'last-item' => $arr['received']],
1790                                         ['id' => $arr['author-id']]);
1791                         }
1792                 }
1793         }
1794
1795         public static function setHashtags(&$item)
1796         {
1797
1798                 $tags = get_tags($item["body"]);
1799
1800                 // No hashtags?
1801                 if (!count($tags)) {
1802                         return false;
1803                 }
1804
1805                 // This sorting is important when there are hashtags that are part of other hashtags
1806                 // Otherwise there could be problems with hashtags like #test and #test2
1807                 rsort($tags);
1808
1809                 $URLSearchString = "^\[\]";
1810
1811                 // All hashtags should point to the home server if "local_tags" is activated
1812                 if (Config::get('system', 'local_tags')) {
1813                         $item["body"] = preg_replace("/#\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",
1814                                         "#[url=".System::baseUrl()."/search?tag=$2]$2[/url]", $item["body"]);
1815
1816                         $item["tag"] = preg_replace("/#\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",
1817                                         "#[url=".System::baseUrl()."/search?tag=$2]$2[/url]", $item["tag"]);
1818                 }
1819
1820                 // mask hashtags inside of url, bookmarks and attachments to avoid urls in urls
1821                 $item["body"] = preg_replace_callback("/\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",
1822                         function ($match) {
1823                                 return ("[url=" . str_replace("#", "&num;", $match[1]) . "]" . str_replace("#", "&num;", $match[2]) . "[/url]");
1824                         }, $item["body"]);
1825
1826                 $item["body"] = preg_replace_callback("/\[bookmark\=([$URLSearchString]*)\](.*?)\[\/bookmark\]/ism",
1827                         function ($match) {
1828                                 return ("[bookmark=" . str_replace("#", "&num;", $match[1]) . "]" . str_replace("#", "&num;", $match[2]) . "[/bookmark]");
1829                         }, $item["body"]);
1830
1831                 $item["body"] = preg_replace_callback("/\[attachment (.*)\](.*?)\[\/attachment\]/ism",
1832                         function ($match) {
1833                                 return ("[attachment " . str_replace("#", "&num;", $match[1]) . "]" . $match[2] . "[/attachment]");
1834                         }, $item["body"]);
1835
1836                 // Repair recursive urls
1837                 $item["body"] = preg_replace("/&num;\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",
1838                                 "&num;$2", $item["body"]);
1839
1840                 foreach ($tags as $tag) {
1841                         if ((strpos($tag, '#') !== 0) || strpos($tag, '[url=')) {
1842                                 continue;
1843                         }
1844
1845                         $basetag = str_replace('_',' ',substr($tag,1));
1846
1847                         $newtag = '#[url=' . System::baseUrl() . '/search?tag=' . rawurlencode($basetag) . ']' . $basetag . '[/url]';
1848
1849                         $item["body"] = str_replace($tag, $newtag, $item["body"]);
1850
1851                         if (!stristr($item["tag"], "/search?tag=" . $basetag . "]" . $basetag . "[/url]")) {
1852                                 if (strlen($item["tag"])) {
1853                                         $item["tag"] = ','.$item["tag"];
1854                                 }
1855                                 $item["tag"] = $newtag.$item["tag"];
1856                         }
1857                 }
1858
1859                 // Convert back the masked hashtags
1860                 $item["body"] = str_replace("&num;", "#", $item["body"]);
1861         }
1862
1863         public static function getGuidById($id)
1864         {
1865                 $item = dba::selectFirst('item', ['guid'], ['id' => $id]);
1866                 if (DBM::is_result($item)) {
1867                         return $item['guid'];
1868                 } else {
1869                         return '';
1870                 }
1871         }
1872
1873         public static function getIdAndNickByGuid($guid, $uid = 0)
1874         {
1875                 $nick = "";
1876                 $id = 0;
1877
1878                 if ($uid == 0) {
1879                         $uid == local_user();
1880                 }
1881
1882                 // Does the given user have this item?
1883                 if ($uid) {
1884                         $item = dba::fetch_first("SELECT `item`.`id`, `user`.`nickname` FROM `item`
1885                                 INNER JOIN `user` ON `user`.`uid` = `item`.`uid`
1886                                 WHERE `item`.`visible` AND NOT `item`.`deleted` AND NOT `item`.`moderated`
1887                                         AND `item`.`guid` = ? AND `item`.`uid` = ?", $guid, $uid);
1888                         if (DBM::is_result($item)) {
1889                                 $id = $item["id"];
1890                                 $nick = $item["nickname"];
1891                         }
1892                 }
1893
1894                 // Or is it anywhere on the server?
1895                 if ($nick == "") {
1896                         $item = dba::fetch_first("SELECT `item`.`id`, `user`.`nickname` FROM `item`
1897                                 INNER JOIN `user` ON `user`.`uid` = `item`.`uid`
1898                                 WHERE `item`.`visible` AND NOT `item`.`deleted` AND NOT `item`.`moderated`
1899                                         AND `item`.`allow_cid` = ''  AND `item`.`allow_gid` = ''
1900                                         AND `item`.`deny_cid`  = '' AND `item`.`deny_gid`  = ''
1901                                         AND NOT `item`.`private` AND `item`.`wall`
1902                                         AND `item`.`guid` = ?", $guid);
1903                         if (DBM::is_result($item)) {
1904                                 $id = $item["id"];
1905                                 $nick = $item["nickname"];
1906                         }
1907                 }
1908                 return ["nick" => $nick, "id" => $id];
1909         }
1910
1911         /**
1912          * look for mention tags and setup a second delivery chain for forum/community posts if appropriate
1913          * @param int $uid
1914          * @param int $item_id
1915          * @return bool true if item was deleted, else false
1916          */
1917         private static function tagDeliver($uid, $item_id)
1918         {
1919                 $mention = false;
1920
1921                 $user = dba::selectFirst('user', [], ['uid' => $uid]);
1922                 if (!DBM::is_result($user)) {
1923                         return;
1924                 }
1925
1926                 $community_page = (($user['page-flags'] == PAGE_COMMUNITY) ? true : false);
1927                 $prvgroup = (($user['page-flags'] == PAGE_PRVGROUP) ? true : false);
1928
1929                 $item = dba::selectFirst('item', [], ['id' => $item_id]);
1930                 if (!DBM::is_result($item)) {
1931                         return;
1932                 }
1933
1934                 $link = normalise_link(System::baseUrl() . '/profile/' . $user['nickname']);
1935
1936                 /*
1937                  * Diaspora uses their own hardwired link URL in @-tags
1938                  * instead of the one we supply with webfinger
1939                  */
1940                 $dlink = normalise_link(System::baseUrl() . '/u/' . $user['nickname']);
1941
1942                 $cnt = preg_match_all('/[\@\!]\[url\=(.*?)\](.*?)\[\/url\]/ism', $item['body'], $matches, PREG_SET_ORDER);
1943                 if ($cnt) {
1944                         foreach ($matches as $mtch) {
1945                                 if (link_compare($link, $mtch[1]) || link_compare($dlink, $mtch[1])) {
1946                                         $mention = true;
1947                                         logger('mention found: ' . $mtch[2]);
1948                                 }
1949                         }
1950                 }
1951
1952                 if (!$mention) {
1953                         if (($community_page || $prvgroup) &&
1954                                   !$item['wall'] && !$item['origin'] && ($item['id'] == $item['parent'])) {
1955                                 // mmh.. no mention.. community page or private group... no wall.. no origin.. top-post (not a comment)
1956                                 // delete it!
1957                                 logger("no-mention top-level post to community or private group. delete.");
1958                                 dba::delete('item', ['id' => $item_id]);
1959                                 return true;
1960                         }
1961                         return;
1962                 }
1963
1964                 $arr = ['item' => $item, 'user' => $user];
1965
1966                 Addon::callHooks('tagged', $arr);
1967
1968                 if (!$community_page && !$prvgroup) {
1969                         return;
1970                 }
1971
1972                 /*
1973                  * tgroup delivery - setup a second delivery chain
1974                  * prevent delivery looping - only proceed
1975                  * if the message originated elsewhere and is a top-level post
1976                  */
1977                 if ($item['wall'] || $item['origin'] || ($item['id'] != $item['parent'])) {
1978                         return;
1979                 }
1980
1981                 // now change this copy of the post to a forum head message and deliver to all the tgroup members
1982                 $self = dba::selectFirst('contact', ['id', 'name', 'url', 'thumb'], ['uid' => $uid, 'self' => true]);
1983                 if (!DBM::is_result($self)) {
1984                         return;
1985                 }
1986
1987                 $owner_id = Contact::getIdForURL($self['url']);
1988
1989                 // also reset all the privacy bits to the forum default permissions
1990
1991                 $private = ($user['allow_cid'] || $user['allow_gid'] || $user['deny_cid'] || $user['deny_gid']) ? 1 : 0;
1992
1993                 $forum_mode = ($prvgroup ? 2 : 1);
1994
1995                 $fields = ['wall' => true, 'origin' => true, 'forum_mode' => $forum_mode, 'contact-id' => $self['id'],
1996                         'owner-id' => $owner_id, 'owner-link' => $self['url'], 'private' => $private, 'allow_cid' => $user['allow_cid'],
1997                         'allow_gid' => $user['allow_gid'], 'deny_cid' => $user['deny_cid'], 'deny_gid' => $user['deny_gid']];
1998                 dba::update('item', $fields, ['id' => $item_id]);
1999
2000                 self::updateThread($item_id);
2001
2002                 Worker::add(['priority' => PRIORITY_HIGH, 'dont_fork' => true], 'Notifier', 'tgroup', $item_id);
2003         }
2004
2005         public static function isRemoteSelf($contact, &$datarray)
2006         {
2007                 $a = get_app();
2008
2009                 if (!$contact['remote_self']) {
2010                         return false;
2011                 }
2012
2013                 // Prevent the forwarding of posts that are forwarded
2014                 if ($datarray["extid"] == NETWORK_DFRN) {
2015                         logger('Already forwarded', LOGGER_DEBUG);
2016                         return false;
2017                 }
2018
2019                 // Prevent to forward already forwarded posts
2020                 if ($datarray["app"] == $a->get_hostname()) {
2021                         logger('Already forwarded (second test)', LOGGER_DEBUG);
2022                         return false;
2023                 }
2024
2025                 // Only forward posts
2026                 if ($datarray["verb"] != ACTIVITY_POST) {
2027                         logger('No post', LOGGER_DEBUG);
2028                         return false;
2029                 }
2030
2031                 if (($contact['network'] != NETWORK_FEED) && $datarray['private']) {
2032                         logger('Not public', LOGGER_DEBUG);
2033                         return false;
2034                 }
2035
2036                 $datarray2 = $datarray;
2037                 logger('remote-self start - Contact '.$contact['url'].' - '.$contact['remote_self'].' Item '.print_r($datarray, true), LOGGER_DEBUG);
2038                 if ($contact['remote_self'] == 2) {
2039                         $self = dba::selectFirst('contact', ['id', 'name', 'url', 'thumb'],
2040                                         ['uid' => $contact['uid'], 'self' => true]);
2041                         if (DBM::is_result($self)) {
2042                                 $datarray['contact-id'] = $self["id"];
2043
2044                                 $datarray['owner-name'] = $self["name"];
2045                                 $datarray['owner-link'] = $self["url"];
2046                                 $datarray['owner-avatar'] = $self["thumb"];
2047
2048                                 $datarray['author-name']   = $datarray['owner-name'];
2049                                 $datarray['author-link']   = $datarray['owner-link'];
2050                                 $datarray['author-avatar'] = $datarray['owner-avatar'];
2051
2052                                 unset($datarray['created']);
2053                                 unset($datarray['edited']);
2054
2055                                 unset($datarray['network']);
2056                                 unset($datarray['owner-id']);
2057                                 unset($datarray['author-id']);
2058                         }
2059
2060                         if ($contact['network'] != NETWORK_FEED) {
2061                                 $datarray["guid"] = get_guid(32);
2062                                 unset($datarray["plink"]);
2063                                 $datarray["uri"] = self::newURI($contact['uid'], $datarray["guid"]);
2064                                 $datarray["parent-uri"] = $datarray["uri"];
2065                                 $datarray["thr-parent"] = $datarray["uri"];
2066                                 $datarray["extid"] = NETWORK_DFRN;
2067                                 $urlpart = parse_url($datarray2['author-link']);
2068                                 $datarray["app"] = $urlpart["host"];
2069                         } else {
2070                                 $datarray['private'] = 0;
2071                         }
2072                 }
2073
2074                 if ($contact['network'] != NETWORK_FEED) {
2075                         // Store the original post
2076                         $result = self::insert($datarray2, false, false);
2077                         logger('remote-self post original item - Contact '.$contact['url'].' return '.$result.' Item '.print_r($datarray2, true), LOGGER_DEBUG);
2078                 } else {
2079                         $datarray["app"] = "Feed";
2080                         $result = true;
2081                 }
2082
2083                 // Trigger automatic reactions for addons
2084                 $datarray['api_source'] = true;
2085
2086                 // We have to tell the hooks who we are - this really should be improved
2087                 $_SESSION["authenticated"] = true;
2088                 $_SESSION["uid"] = $contact['uid'];
2089
2090                 return $result;
2091         }
2092
2093         /**
2094          *
2095          * @param string $s
2096          * @param int    $uid
2097          * @param array  $item
2098          * @param int    $cid
2099          * @return string
2100          */
2101         public static function fixPrivatePhotos($s, $uid, $item = null, $cid = 0)
2102         {
2103                 if (Config::get('system', 'disable_embedded')) {
2104                         return $s;
2105                 }
2106
2107                 logger('check for photos', LOGGER_DEBUG);
2108                 $site = substr(System::baseUrl(), strpos(System::baseUrl(), '://'));
2109
2110                 $orig_body = $s;
2111                 $new_body = '';
2112
2113                 $img_start = strpos($orig_body, '[img');
2114                 $img_st_close = ($img_start !== false ? strpos(substr($orig_body, $img_start), ']') : false);
2115                 $img_len = ($img_start !== false ? strpos(substr($orig_body, $img_start + $img_st_close + 1), '[/img]') : false);
2116
2117                 while (($img_st_close !== false) && ($img_len !== false)) {
2118                         $img_st_close++; // make it point to AFTER the closing bracket
2119                         $image = substr($orig_body, $img_start + $img_st_close, $img_len);
2120
2121                         logger('found photo ' . $image, LOGGER_DEBUG);
2122
2123                         if (stristr($image, $site . '/photo/')) {
2124                                 // Only embed locally hosted photos
2125                                 $replace = false;
2126                                 $i = basename($image);
2127                                 $i = str_replace(['.jpg', '.png', '.gif'], ['', '', ''], $i);
2128                                 $x = strpos($i, '-');
2129
2130                                 if ($x) {
2131                                         $res = substr($i, $x + 1);
2132                                         $i = substr($i, 0, $x);
2133                                         $fields = ['data', 'type', 'allow_cid', 'allow_gid', 'deny_cid', 'deny_gid'];
2134                                         $photo = dba::selectFirst('photo', $fields, ['resource-id' => $i, 'scale' => $res, 'uid' => $uid]);
2135                                         if (DBM::is_result($photo)) {
2136                                                 /*
2137                                                  * Check to see if we should replace this photo link with an embedded image
2138                                                  * 1. No need to do so if the photo is public
2139                                                  * 2. If there's a contact-id provided, see if they're in the access list
2140                                                  *    for the photo. If so, embed it.
2141                                                  * 3. Otherwise, if we have an item, see if the item permissions match the photo
2142                                                  *    permissions, regardless of order but first check to see if they're an exact
2143                                                  *    match to save some processing overhead.
2144                                                  */
2145                                                 if (self::hasPermissions($photo)) {
2146                                                         if ($cid) {
2147                                                                 $recips = self::enumeratePermissions($photo);
2148                                                                 if (in_array($cid, $recips)) {
2149                                                                         $replace = true;
2150                                                                 }
2151                                                         } elseif ($item) {
2152                                                                 if (self::samePermissions($item, $photo)) {
2153                                                                         $replace = true;
2154                                                                 }
2155                                                         }
2156                                                 }
2157                                                 if ($replace) {
2158                                                         $data = $photo['data'];
2159                                                         $type = $photo['type'];
2160
2161                                                         // If a custom width and height were specified, apply before embedding
2162                                                         if (preg_match("/\[img\=([0-9]*)x([0-9]*)\]/is", substr($orig_body, $img_start, $img_st_close), $match)) {
2163                                                                 logger('scaling photo', LOGGER_DEBUG);
2164
2165                                                                 $width = intval($match[1]);
2166                                                                 $height = intval($match[2]);
2167
2168                                                                 $Image = new Image($data, $type);
2169                                                                 if ($Image->isValid()) {
2170                                                                         $Image->scaleDown(max($width, $height));
2171                                                                         $data = $Image->asString();
2172                                                                         $type = $Image->getType();
2173                                                                 }
2174                                                         }
2175
2176                                                         logger('replacing photo', LOGGER_DEBUG);
2177                                                         $image = 'data:' . $type . ';base64,' . base64_encode($data);
2178                                                         logger('replaced: ' . $image, LOGGER_DATA);
2179                                                 }
2180                                         }
2181                                 }
2182                         }
2183
2184                         $new_body = $new_body . substr($orig_body, 0, $img_start + $img_st_close) . $image . '[/img]';
2185                         $orig_body = substr($orig_body, $img_start + $img_st_close + $img_len + strlen('[/img]'));
2186                         if ($orig_body === false) {
2187                                 $orig_body = '';
2188                         }
2189
2190                         $img_start = strpos($orig_body, '[img');
2191                         $img_st_close = ($img_start !== false ? strpos(substr($orig_body, $img_start), ']') : false);
2192                         $img_len = ($img_start !== false ? strpos(substr($orig_body, $img_start + $img_st_close + 1), '[/img]') : false);
2193                 }
2194
2195                 $new_body = $new_body . $orig_body;
2196
2197                 return $new_body;
2198         }
2199
2200         private static function hasPermissions($obj)
2201         {
2202                 return (
2203                         (
2204                                 x($obj, 'allow_cid')
2205                         ) || (
2206                                 x($obj, 'allow_gid')
2207                         ) || (
2208                                 x($obj, 'deny_cid')
2209                         ) || (
2210                                 x($obj, 'deny_gid')
2211                         )
2212                 );
2213         }
2214
2215         private static function samePermissions($obj1, $obj2)
2216         {
2217                 // first part is easy. Check that these are exactly the same.
2218                 if (($obj1['allow_cid'] == $obj2['allow_cid'])
2219                         && ($obj1['allow_gid'] == $obj2['allow_gid'])
2220                         && ($obj1['deny_cid'] == $obj2['deny_cid'])
2221                         && ($obj1['deny_gid'] == $obj2['deny_gid'])) {
2222                         return true;
2223                 }
2224
2225                 // This is harder. Parse all the permissions and compare the resulting set.
2226                 $recipients1 = self::enumeratePermissions($obj1);
2227                 $recipients2 = self::enumeratePermissions($obj2);
2228                 sort($recipients1);
2229                 sort($recipients2);
2230
2231                 /// @TODO Comparison of arrays, maybe use array_diff_assoc() here?
2232                 return ($recipients1 == $recipients2);
2233         }
2234
2235         // returns an array of contact-ids that are allowed to see this object
2236         private static function enumeratePermissions($obj)
2237         {
2238                 $allow_people = expand_acl($obj['allow_cid']);
2239                 $allow_groups = Group::expand(expand_acl($obj['allow_gid']));
2240                 $deny_people  = expand_acl($obj['deny_cid']);
2241                 $deny_groups  = Group::expand(expand_acl($obj['deny_gid']));
2242                 $recipients   = array_unique(array_merge($allow_people, $allow_groups));
2243                 $deny         = array_unique(array_merge($deny_people, $deny_groups));
2244                 $recipients   = array_diff($recipients, $deny);
2245                 return $recipients;
2246         }
2247
2248         public static function getFeedTags($item)
2249         {
2250                 $ret = [];
2251                 $matches = false;
2252                 $cnt = preg_match_all('|\#\[url\=(.*?)\](.*?)\[\/url\]|', $item['tag'], $matches);
2253                 if ($cnt) {
2254                         for ($x = 0; $x < $cnt; $x ++) {
2255                                 if ($matches[1][$x]) {
2256                                         $ret[$matches[2][$x]] = ['#', $matches[1][$x], $matches[2][$x]];
2257                                 }
2258                         }
2259                 }
2260                 $matches = false;
2261                 $cnt = preg_match_all('|\@\[url\=(.*?)\](.*?)\[\/url\]|', $item['tag'], $matches);
2262                 if ($cnt) {
2263                         for ($x = 0; $x < $cnt; $x ++) {
2264                                 if ($matches[1][$x]) {
2265                                         $ret[] = ['@', $matches[1][$x], $matches[2][$x]];
2266                                 }
2267                         }
2268                 }
2269                 return $ret;
2270         }
2271
2272         public static function expire($uid, $days, $network = "", $force = false)
2273         {
2274                 if (!$uid || ($days < 1)) {
2275                         return;
2276                 }
2277
2278                 /*
2279                  * $expire_network_only = save your own wall posts
2280                  * and just expire conversations started by others
2281                  */
2282                 $expire_network_only = PConfig::get($uid,'expire', 'network_only');
2283                 $sql_extra = (intval($expire_network_only) ? " AND wall = 0 " : "");
2284
2285                 if ($network != "") {
2286                         $sql_extra .= sprintf(" AND network = '%s' ", dbesc($network));
2287
2288                         /*
2289                          * There is an index "uid_network_received" but not "uid_network_created"
2290                          * This avoids the creation of another index just for one purpose.
2291                          * And it doesn't really matter wether to look at "received" or "created"
2292                          */
2293                         $range = "AND `received` < UTC_TIMESTAMP() - INTERVAL %d DAY ";
2294                 } else {
2295                         $range = "AND `created` < UTC_TIMESTAMP() - INTERVAL %d DAY ";
2296                 }
2297
2298                 $r = q("SELECT `file`, `resource-id`, `starred`, `type`, `id` FROM `item`
2299                         WHERE `uid` = %d $range
2300                         AND `id` = `parent`
2301                         $sql_extra
2302                         AND `deleted` = 0",
2303                         intval($uid),
2304                         intval($days)
2305                 );
2306
2307                 if (!DBM::is_result($r)) {
2308                         return;
2309                 }
2310
2311                 $expire_items = PConfig::get($uid, 'expire', 'items', 1);
2312
2313                 // Forcing expiring of items - but not notes and marked items
2314                 if ($force) {
2315                         $expire_items = true;
2316                 }
2317
2318                 $expire_notes = PConfig::get($uid, 'expire', 'notes', 1);
2319                 $expire_starred = PConfig::get($uid, 'expire', 'starred', 1);
2320                 $expire_photos = PConfig::get($uid, 'expire', 'photos', 0);
2321
2322                 logger('User '.$uid.': expire: # items=' . count($r). "; expire items: $expire_items, expire notes: $expire_notes, expire starred: $expire_starred, expire photos: $expire_photos");
2323
2324                 foreach ($r as $item) {
2325
2326                         // don't expire filed items
2327
2328                         if (strpos($item['file'],'[') !== false) {
2329                                 continue;
2330                         }
2331
2332                         // Only expire posts, not photos and photo comments
2333
2334                         if ($expire_photos == 0 && strlen($item['resource-id'])) {
2335                                 continue;
2336                         } elseif ($expire_starred == 0 && intval($item['starred'])) {
2337                                 continue;
2338                         } elseif ($expire_notes == 0 && $item['type'] == 'note') {
2339                                 continue;
2340                         } elseif ($expire_items == 0 && $item['type'] != 'note') {
2341                                 continue;
2342                         }
2343
2344                         self::deleteById($item['id'], PRIORITY_LOW);
2345                 }
2346         }
2347
2348         public static function firstPostDate($uid, $wall = false)
2349         {
2350                 $condition = ['uid' => $uid, 'wall' => $wall, 'deleted' => false, 'visible' => true, 'moderated' => false];
2351                 $params = ['order' => ['created' => false]];
2352                 $thread = dba::selectFirst('thread', ['created'], $condition, $params);
2353                 if (DBM::is_result($thread)) {
2354                         return substr(DateTimeFormat::local($thread['created']), 0, 10);
2355                 }
2356                 return false;
2357         }
2358
2359         /**
2360          * @brief add/remove activity to an item
2361          *
2362          * Toggle activities as like,dislike,attend of an item
2363          *
2364          * @param string $item_id
2365          * @param string $verb
2366          *              Activity verb. One of
2367          *                      like, unlike, dislike, undislike, attendyes, unattendyes,
2368          *                      attendno, unattendno, attendmaybe, unattendmaybe
2369          * @hook 'post_local_end'
2370          *              array $arr
2371          *                      'post_id' => ID of posted item
2372          */
2373         public static function performLike($item_id, $verb)
2374         {
2375                 if (!local_user() && !remote_user()) {
2376                         return false;
2377                 }
2378
2379                 switch ($verb) {
2380                         case 'like':
2381                         case 'unlike':
2382                                 $bodyverb = L10n::t('%1$s likes %2$s\'s %3$s');
2383                                 $activity = ACTIVITY_LIKE;
2384                                 break;
2385                         case 'dislike':
2386                         case 'undislike':
2387                                 $bodyverb = L10n::t('%1$s doesn\'t like %2$s\'s %3$s');
2388                                 $activity = ACTIVITY_DISLIKE;
2389                                 break;
2390                         case 'attendyes':
2391                         case 'unattendyes':
2392                                 $bodyverb = L10n::t('%1$s is attending %2$s\'s %3$s');
2393                                 $activity = ACTIVITY_ATTEND;
2394                                 break;
2395                         case 'attendno':
2396                         case 'unattendno':
2397                                 $bodyverb = L10n::t('%1$s is not attending %2$s\'s %3$s');
2398                                 $activity = ACTIVITY_ATTENDNO;
2399                                 break;
2400                         case 'attendmaybe':
2401                         case 'unattendmaybe':
2402                                 $bodyverb = L10n::t('%1$s may attend %2$s\'s %3$s');
2403                                 $activity = ACTIVITY_ATTENDMAYBE;
2404                                 break;
2405                         default:
2406                                 logger('like: unknown verb ' . $verb . ' for item ' . $item_id);
2407                                 return false;
2408                 }
2409
2410                 // Enable activity toggling instead of on/off
2411                 $event_verb_flag = $activity === ACTIVITY_ATTEND || $activity === ACTIVITY_ATTENDNO || $activity === ACTIVITY_ATTENDMAYBE;
2412
2413                 logger('like: verb ' . $verb . ' item ' . $item_id);
2414
2415                 $item = dba::selectFirst('item', [], ['`id` = ? OR `uri` = ?', $item_id, $item_id]);
2416                 if (!DBM::is_result($item)) {
2417                         logger('like: unknown item ' . $item_id);
2418                         return false;
2419                 }
2420
2421                 $uid = $item['uid'];
2422                 if (($uid == 0) && local_user()) {
2423                         $uid = local_user();
2424                 }
2425
2426                 if (!can_write_wall($uid)) {
2427                         logger('like: unable to write on wall ' . $uid);
2428                         return false;
2429                 }
2430
2431                 // Retrieves the local post owner
2432                 $owner_self_contact = dba::selectFirst('contact', [], ['uid' => $uid, 'self' => true]);
2433                 if (!DBM::is_result($owner_self_contact)) {
2434                         logger('like: unknown owner ' . $uid);
2435                         return false;
2436                 }
2437
2438                 // Retrieve the current logged in user's public contact
2439                 $author_id = public_contact();
2440
2441                 $author_contact = dba::selectFirst('contact', [], ['id' => $author_id]);
2442                 if (!DBM::is_result($author_contact)) {
2443                         logger('like: unknown author ' . $author_id);
2444                         return false;
2445                 }
2446
2447                 // Contact-id is the uid-dependant author contact
2448                 if (local_user() == $uid) {
2449                         $item_contact_id = $owner_self_contact['id'];
2450                         $item_contact = $owner_self_contact;
2451                 } else {
2452                         $item_contact_id = Contact::getIdForURL($author_contact['url'], $uid, true);
2453                         $item_contact = dba::selectFirst('contact', [], ['id' => $item_contact_id]);
2454                         if (!DBM::is_result($item_contact)) {
2455                                 logger('like: unknown item contact ' . $item_contact_id);
2456                                 return false;
2457                         }
2458                 }
2459
2460                 // Look for an existing verb row
2461                 // event participation are essentially radio toggles. If you make a subsequent choice,
2462                 // we need to eradicate your first choice.
2463                 if ($event_verb_flag) {
2464                         $verbs = "'" . dbesc(ACTIVITY_ATTEND) . "', '" . dbesc(ACTIVITY_ATTENDNO) . "', '" . dbesc(ACTIVITY_ATTENDMAYBE) . "'";
2465                 } else {
2466                         $verbs = "'".dbesc($activity)."'";
2467                 }
2468
2469                 /// @todo This query is expected to be a performance eater due to the "OR" - it has to be changed totally
2470                 $existing_like = q("SELECT `id`, `guid`, `verb` FROM `item`
2471                         WHERE `verb` IN ($verbs)
2472                         AND `deleted` = 0
2473                         AND `author-id` = %d
2474                         AND `uid` = %d
2475                         AND (`parent` = '%s' OR `parent-uri` = '%s' OR `thr-parent` = '%s')
2476                         LIMIT 1",
2477                         intval($author_contact['id']),
2478                         intval($item['uid']),
2479                         dbesc($item_id), dbesc($item_id), dbesc($item['uri'])
2480                 );
2481
2482                 // If it exists, mark it as deleted
2483                 if (DBM::is_result($existing_like)) {
2484                         $like_item = $existing_like[0];
2485
2486                         // Already voted, undo it
2487                         $fields = ['deleted' => true, 'unseen' => true, 'changed' => DateTimeFormat::utcNow()];
2488                         dba::update('item', $fields, ['id' => $like_item['id']]);
2489
2490                         // Clean up the Diaspora signatures for this like
2491                         // Go ahead and do it even if Diaspora support is disabled. We still want to clean up
2492                         // if it had been enabled in the past
2493                         dba::delete('sign', ['iid' => $like_item['id']]);
2494
2495                         $like_item_id = $like_item['id'];
2496                         Worker::add(PRIORITY_HIGH, "Notifier", "like", $like_item_id);
2497
2498                         if (!$event_verb_flag || $like_item['verb'] == $activity) {
2499                                 return true;
2500                         }
2501                 }
2502
2503                 // Verb is "un-something", just trying to delete existing entries
2504                 if (strpos($verb, 'un') === 0) {
2505                         return true;
2506                 }
2507
2508                 // Else or if event verb different from existing row, create a new item row
2509                 $post_type = (($item['resource-id']) ? L10n::t('photo') : L10n::t('status'));
2510                 if ($item['object-type'] === ACTIVITY_OBJ_EVENT) {
2511                         $post_type = L10n::t('event');
2512                 }
2513                 $objtype = $item['resource-id'] ? ACTIVITY_OBJ_IMAGE : ACTIVITY_OBJ_NOTE ;
2514                 $link = xmlify('<link rel="alternate" type="text/html" href="' . System::baseUrl() . '/display/' . $owner_self_contact['nick'] . '/' . $item['id'] . '" />' . "\n") ;
2515                 $body = $item['body'];
2516
2517                 $obj = <<< EOT
2518
2519                 <object>
2520                         <type>$objtype</type>
2521                         <local>1</local>
2522                         <id>{$item['uri']}</id>
2523                         <link>$link</link>
2524                         <title></title>
2525                         <content>$body</content>
2526                 </object>
2527 EOT;
2528
2529                 $ulink = '[url=' . $author_contact['url'] . ']' . $author_contact['name'] . '[/url]';
2530                 $alink = '[url=' . $item['author-link'] . ']' . $item['author-name'] . '[/url]';
2531                 $plink = '[url=' . System::baseUrl() . '/display/' . $owner_self_contact['nick'] . '/' . $item['id'] . ']' . $post_type . '[/url]';
2532
2533                 $new_item = [
2534                         'guid'          => get_guid(32),
2535                         'uri'           => self::newURI($item['uid']),
2536                         'uid'           => $item['uid'],
2537                         'contact-id'    => $item_contact_id,
2538                         'type'          => 'activity',
2539                         'wall'          => $item['wall'],
2540                         'origin'        => 1,
2541                         'gravity'       => GRAVITY_LIKE,
2542                         'parent'        => $item['id'],
2543                         'parent-uri'    => $item['uri'],
2544                         'thr-parent'    => $item['uri'],
2545                         'owner-id'      => $item['owner-id'],
2546                         'owner-name'    => $item['owner-name'],
2547                         'owner-link'    => $item['owner-link'],
2548                         'owner-avatar'  => $item['owner-avatar'],
2549                         'author-id'     => $author_contact['id'],
2550                         'author-name'   => $author_contact['name'],
2551                         'author-link'   => $author_contact['url'],
2552                         'author-avatar' => $author_contact['thumb'],
2553                         'body'          => sprintf($bodyverb, $ulink, $alink, $plink),
2554                         'verb'          => $activity,
2555                         'object-type'   => $objtype,
2556                         'object'        => $obj,
2557                         'allow_cid'     => $item['allow_cid'],
2558                         'allow_gid'     => $item['allow_gid'],
2559                         'deny_cid'      => $item['deny_cid'],
2560                         'deny_gid'      => $item['deny_gid'],
2561                         'visible'       => 1,
2562                         'unseen'        => 1,
2563                 ];
2564
2565                 $new_item_id = self::insert($new_item);
2566
2567                 // If the parent item isn't visible then set it to visible
2568                 if (!$item['visible']) {
2569                         self::update(['visible' => true], ['id' => $item['id']]);
2570                 }
2571
2572                 // Save the author information for the like in case we need to relay to Diaspora
2573                 Diaspora::storeLikeSignature($item_contact, $new_item_id);
2574
2575                 $new_item['id'] = $new_item_id;
2576
2577                 Addon::callHooks('post_local_end', $new_item);
2578
2579                 Worker::add(PRIORITY_HIGH, "Notifier", "like", $new_item_id);
2580
2581                 return true;
2582         }
2583
2584         private static function addThread($itemid, $onlyshadow = false)
2585         {
2586                 $fields = ['uid', 'created', 'edited', 'commented', 'received', 'changed', 'wall', 'private', 'pubmail',
2587                         'moderated', 'visible', 'starred', 'bookmark', 'contact-id',
2588                         'deleted', 'origin', 'forum_mode', 'mention', 'network', 'author-id', 'owner-id'];
2589                 $condition = ["`id` = ? AND (`parent` = ? OR `parent` = 0)", $itemid, $itemid];
2590                 $item = dba::selectFirst('item', $fields, $condition);
2591
2592                 if (!DBM::is_result($item)) {
2593                         return;
2594                 }
2595
2596                 $item['iid'] = $itemid;
2597
2598                 if (!$onlyshadow) {
2599                         $result = dba::insert('thread', $item);
2600
2601                         logger("Add thread for item ".$itemid." - ".print_r($result, true), LOGGER_DEBUG);
2602                 }
2603         }
2604
2605         private static function updateThread($itemid, $setmention = false)
2606         {
2607                 $fields = ['uid', 'guid', 'title', 'body', 'created', 'edited', 'commented', 'received', 'changed',
2608                         'wall', 'private', 'pubmail', 'moderated', 'visible', 'starred', 'bookmark', 'contact-id',
2609                         'deleted', 'origin', 'forum_mode', 'network', 'author-id', 'owner-id', 'rendered-html', 'rendered-hash'];
2610                 $condition = ["`id` = ? AND (`parent` = ? OR `parent` = 0)", $itemid, $itemid];
2611
2612                 $item = dba::selectFirst('item', $fields, $condition);
2613                 if (!DBM::is_result($item)) {
2614                         return;
2615                 }
2616
2617                 if ($setmention) {
2618                         $item["mention"] = 1;
2619                 }
2620
2621                 $sql = "";
2622
2623                 $fields = [];
2624
2625                 foreach ($item as $field => $data) {
2626                         if (!in_array($field, ["guid", "title", "body", "rendered-html", "rendered-hash"])) {
2627                                 $fields[$field] = $data;
2628                         }
2629                 }
2630
2631                 $result = dba::update('thread', $fields, ['iid' => $itemid]);
2632
2633                 logger("Update thread for item ".$itemid." - guid ".$item["guid"]." - ".(int)$result, LOGGER_DEBUG);
2634
2635                 // Updating a shadow item entry
2636                 $items = dba::selectFirst('item', ['id'], ['guid' => $item['guid'], 'uid' => 0]);
2637
2638                 if (!DBM::is_result($items)) {
2639                         return;
2640                 }
2641
2642                 $fields = ['title' => $item['title'], 'body' => $item['body'],
2643                         'rendered-html' => $item['rendered-html'], 'rendered-hash' => $item['rendered-hash']];
2644                 $result = dba::update('item', $fields, ['id' => $items['id']]);
2645
2646                 logger("Updating public shadow for post ".$items["id"]." - guid ".$item["guid"]." Result: ".print_r($result, true), LOGGER_DEBUG);
2647         }
2648
2649         private static function deleteThread($itemid, $itemuri = "")
2650         {
2651                 $item = dba::selectFirst('thread', ['uid'], ['iid' => $itemid]);
2652                 if (!DBM::is_result($item)) {
2653                         logger('No thread found for id '.$itemid, LOGGER_DEBUG);
2654                         return;
2655                 }
2656
2657                 // Using dba::delete at this time could delete the associated item entries
2658                 $result = dba::e("DELETE FROM `thread` WHERE `iid` = ?", $itemid);
2659
2660                 logger("deleteThread: Deleted thread for item ".$itemid." - ".print_r($result, true), LOGGER_DEBUG);
2661
2662                 if ($itemuri != "") {
2663                         $condition = ["`uri` = ? AND NOT `deleted` AND NOT (`uid` IN (?, 0))", $itemuri, $item["uid"]];
2664                         if (!dba::exists('item', $condition)) {
2665                                 dba::delete('item', ['uri' => $itemuri, 'uid' => 0]);
2666                                 logger("deleteThread: Deleted shadow for item ".$itemuri, LOGGER_DEBUG);
2667                         }
2668                 }
2669         }
2670 }