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         // Field list for "item-content" table that is mixed with the item table
  60         const CONTENT_FIELDLIST = ['title', 'content-warning', 'body', 'location',
  61                         'coord', 'app', 'rendered-hash', 'rendered-html', 'verb',
  62                         'object-type', 'object', 'target-type', 'target'];
  63
  64         // All fields in the item table
  65         const ITEM_FIELDLIST = ['id', 'uid', 'parent', 'uri', 'parent-uri', 'thr-parent', 'guid',
  66                         'contact-id', 'type', 'wall', 'gravity', 'extid', 'icid',
  67                         'created', 'edited', 'commented', 'received', 'changed', 'verb',
  68                         'postopts', 'plink', 'resource-id', 'event-id', 'tag', 'attach', 'inform',
  69                         'file', 'allow_cid', 'allow_gid', 'deny_cid', 'deny_gid',
  70                         'private', 'pubmail', 'moderated', 'visible', 'starred', 'bookmark',
  71                         'unseen', 'deleted', 'origin', 'forum_mode', 'mention', 'global', 'network',
  72                         'title', 'content-warning', 'body', 'location', 'coord', 'app',
  73                         'rendered-hash', 'rendered-html', 'object-type', 'object', 'target-type', 'target',
  74                         'author-id', 'author-link', 'author-name', 'author-avatar',
  75                         'owner-id', 'owner-link', 'owner-name', 'owner-avatar'];
  76
  77         /**
  78          * @brief Fetch a single item row
  79          *
  80          * @param mixed $stmt statement object
  81          * @return array current row
  82          */
  83         public static function fetch($stmt)
  84         {
  85                 $row = dba::fetch($stmt);
  86
  87                 // Fetch data from the item-content table whenever there is content there
  88                 foreach (self::CONTENT_FIELDLIST as $field) {
  89                         if (empty($row[$field]) && !empty($row['item-' . $field])) {
  90                                 $row[$field] = $row['item-' . $field];
  91                         }
  92                         unset($row['item-' . $field]);
  93                 }
  94
  95                 // We prefer the data from the user's contact over the public one
  96                 if (!empty($row['author-link']) && !empty($row['contact-link']) &&
  97                         ($row['author-link'] == $row['contact-link'])) {
  98                         if (isset($row['author-avatar']) && !empty($row['contact-avatar'])) {
  99                                 $row['author-avatar'] = $row['contact-avatar'];
 100                         }
 101                         if (isset($row['author-name']) && !empty($row['contact-name'])) {
 102                                 $row['author-name'] = $row['contact-name'];
 103                         }
 104                 }
 105
 106                 if (!empty($row['owner-link']) && !empty($row['contact-link']) &&
 107                         ($row['owner-link'] == $row['contact-link'])) {
 108                         if (isset($row['owner-avatar']) && !empty($row['contact-avatar'])) {
 109                                 $row['owner-avatar'] = $row['contact-avatar'];
 110                         }
 111                         if (isset($row['owner-name']) && !empty($row['contact-name'])) {
 112                                 $row['owner-name'] = $row['contact-name'];
 113                         }
 114                 }
 115
 116                 // We can always comment on posts from these networks
 117                 if (isset($row['writable']) && !empty($row['network']) &&
 118                         in_array($row['network'], [NETWORK_DFRN, NETWORK_DIASPORA, NETWORK_OSTATUS])) {
 119                         $row['writable'] = true;
 120                 }
 121
 122                 return $row;
 123         }
 124
 125         /**
 126          * @brief Fills an array with data from an item query
 127          *
 128          * @param object $stmt statement object
 129          * @return array Data array
 130          */
 131         public static function inArray($stmt, $do_close = true) {
 132                 if (is_bool($stmt)) {
 133                         return $stmt;
 134                 }
 135
 136                 $data = [];
 137                 while ($row = self::fetch($stmt)) {
 138                         $data[] = $row;
 139                 }
 140                 if ($do_close) {
 141                         dba::close($stmt);
 142                 }
 143                 return $data;
 144         }
 145
 146         /**
 147          * @brief Check if item data exists
 148          *
 149          * @param array $condition array of fields for condition
 150          *
 151          * @return boolean Are there rows for that condition?
 152          */
 153         public static function exists($condition) {
 154                 $stmt = self::select(['id'], $condition, ['limit' => 1]);
 155
 156                 if (is_bool($stmt)) {
 157                         $retval = $stmt;
 158                 } else {
 159                         $retval = (dba::num_rows($stmt) > 0);
 160                 }
 161
 162                 dba::close($stmt);
 163
 164                 return $retval;
 165         }
 166
 167         /**
 168          * Retrieve a single record from the item table for a given user and returns it in an associative array
 169          *
 170          * @brief Retrieve a single record from a table
 171          * @param integer $uid User ID
 172          * @param array  $fields
 173          * @param array  $condition
 174          * @param array  $params
 175          * @return bool|array
 176          * @see dba::select
 177          */
 178         public static function selectFirstForUser($uid, array $selected = [], array $condition = [], $params = [])
 179         {
 180                 $params['uid'] = $uid;
 181
 182                 if (empty($selected)) {
 183                         $selected = Item::DISPLAY_FIELDLIST;
 184                 }
 185
 186                 return self::selectFirst($selected, $condition, $params);
 187         }
 188
 189         /**
 190          * @brief Select rows from the item table for a given user
 191          *
 192          * @param integer $uid User ID
 193          * @param array  $selected  Array of selected fields, empty for all
 194          * @param array  $condition Array of fields for condition
 195          * @param array  $params    Array of several parameters
 196          *
 197          * @return boolean|object
 198          */
 199         public static function selectForUser($uid, array $selected = [], array $condition = [], $params = [])
 200         {
 201                 $params['uid'] = $uid;
 202
 203                 if (empty($selected)) {
 204                         $selected = Item::DISPLAY_FIELDLIST;
 205                 }
 206
 207                 return self::select($selected, $condition, $params);
 208         }
 209
 210         /**
 211          * Retrieve a single record from the item table and returns it in an associative array
 212          *
 213          * @brief Retrieve a single record from a table
 214          * @param array  $fields
 215          * @param array  $condition
 216          * @param array  $params
 217          * @return bool|array
 218          * @see dba::select
 219          */
 220         public static function selectFirst(array $fields = [], array $condition = [], $params = [])
 221         {
 222                 $params['limit'] = 1;
 223
 224                 $result = self::select($fields, $condition, $params);
 225
 226                 if (is_bool($result)) {
 227                         return $result;
 228                 } else {
 229                         $row = self::fetch($result);
 230                         dba::close($result);
 231                         return $row;
 232                 }
 233         }
 234
 235         /**
 236          * @brief Select rows from the item table
 237          *
 238          * @param array  $selected  Array of selected fields, empty for all
 239          * @param array  $condition Array of fields for condition
 240          * @param array  $params    Array of several parameters
 241          *
 242          * @return boolean|object
 243          */
 244         public static function select(array $selected = [], array $condition = [], $params = [])
 245         {
 246                 $uid = 0;
 247                 $usermode = false;
 248
 249                 if (isset($params['uid'])) {
 250                         $uid = $params['uid'];
 251                         $usermode = true;
 252                 }
 253
 254                 $fields = self::fieldlist($selected);
 255
 256                 $select_fields = self::constructSelectFields($fields, $selected);
 257
 258                 $condition_string = dba::buildCondition($condition);
 259
 260                 $condition_string = self::addTablesToFields($condition_string, $fields);
 261
 262                 if ($usermode) {
 263                         $condition_string = $condition_string . ' AND ' . self::condition(false);
 264                 }
 265
 266                 $param_string = self::addTablesToFields(dba::buildParameter($params), $fields);
 267
 268                 $table = "`item` " . self::constructJoins($uid, $select_fields . $condition_string . $param_string, false);
 269
 270                 $sql = "SELECT " . $select_fields . " FROM " . $table . $condition_string . $param_string;
 271
 272                 return dba::p($sql, $condition);
 273         }
 274
 275         /**
 276          * @brief Select rows from the starting post in the item table
 277          *
 278          * @param integer $uid User ID
 279          * @param array  $fields    Array of selected fields, empty for all
 280          * @param array  $condition Array of fields for condition
 281          * @param array  $params    Array of several parameters
 282          *
 283          * @return boolean|object
 284          */
 285         public static function selectThreadForUser($uid, array $selected = [], array $condition = [], $params = [])
 286         {
 287                 $params['uid'] = $uid;
 288
 289                 if (empty($selected)) {
 290                         $selected = Item::DISPLAY_FIELDLIST;
 291                 }
 292
 293                 return self::selectThread($selected, $condition, $params);
 294         }
 295
 296         /**
 297          * Retrieve a single record from the starting post in the item table and returns it in an associative array
 298          *
 299          * @brief Retrieve a single record from a table
 300          * @param integer $uid User ID
 301          * @param array  $selected
 302          * @param array  $condition
 303          * @param array  $params
 304          * @return bool|array
 305          * @see dba::select
 306          */
 307         public static function selectFirstThreadForUser($uid, array $selected = [], array $condition = [], $params = [])
 308         {
 309                 $params['uid'] = $uid;
 310
 311                 if (empty($selected)) {
 312                         $selected = Item::DISPLAY_FIELDLIST;
 313                 }
 314
 315                 return self::selectFirstThread($selected, $condition, $params);
 316         }
 317
 318         /**
 319          * Retrieve a single record from the starting post in the item table and returns it in an associative array
 320          *
 321          * @brief Retrieve a single record from a table
 322          * @param array  $fields
 323          * @param array  $condition
 324          * @param array  $params
 325          * @return bool|array
 326          * @see dba::select
 327          */
 328         public static function selectFirstThread(array $fields = [], array $condition = [], $params = [])
 329         {
 330                 $params['limit'] = 1;
 331                 $result = self::selectThread($fields, $condition, $params);
 332
 333                 if (is_bool($result)) {
 334                         return $result;
 335                 } else {
 336                         $row = self::fetch($result);
 337                         dba::close($result);
 338                         return $row;
 339                 }
 340         }
 341
 342         /**
 343          * @brief Select rows from the starting post in the item table
 344          *
 345          * @param array  $selected  Array of selected fields, empty for all
 346          * @param array  $condition Array of fields for condition
 347          * @param array  $params    Array of several parameters
 348          *
 349          * @return boolean|object
 350          */
 351         public static function selectThread(array $selected = [], array $condition = [], $params = [])
 352         {
 353                 $uid = 0;
 354                 $usermode = false;
 355
 356                 if (isset($params['uid'])) {
 357                         $uid = $params['uid'];
 358                         $usermode = true;
 359                 }
 360
 361                 $fields = self::fieldlist($selected);
 362
 363                 $threadfields = ['thread' => ['iid', 'uid', 'contact-id', 'owner-id', 'author-id',
 364                         'created', 'edited', 'commented', 'received', 'changed', 'wall', 'private',
 365                         'pubmail', 'moderated', 'visible', 'starred', 'ignored', 'bookmark',
 366                         'unseen', 'deleted', 'origin', 'forum_mode', 'mention', 'network']];
 367
 368                 $select_fields = self::constructSelectFields($fields, $selected);
 369
 370                 $condition_string = dba::buildCondition($condition);
 371
 372                 $condition_string = self::addTablesToFields($condition_string, $threadfields);
 373                 $condition_string = self::addTablesToFields($condition_string, $fields);
 374
 375                 if ($usermode) {
 376                         $condition_string = $condition_string . ' AND ' . self::condition(true);
 377                 }
 378
 379                 $param_string = dba::buildParameter($params);
 380                 $param_string = self::addTablesToFields($param_string, $threadfields);
 381                 $param_string = self::addTablesToFields($param_string, $fields);
 382
 383                 $table = "`thread` " . self::constructJoins($uid, $select_fields . $condition_string . $param_string, true);
 384
 385                 $sql = "SELECT " . $select_fields . " FROM " . $table . $condition_string . $param_string;
 386
 387                 return dba::p($sql, $condition);
 388         }
 389
 390         /**
 391          * @brief Returns a list of fields that are associated with the item table
 392          *
 393          * @return array field list
 394          */
 395         private static function fieldlist($selected)
 396         {
 397                 $fields = [];
 398
 399                 $fields['item'] = ['id', 'uid', 'parent', 'uri', 'parent-uri', 'thr-parent', 'guid',
 400                         'contact-id', 'owner-id', 'author-id', 'type', 'wall', 'gravity', 'extid',
 401                         'created', 'edited', 'commented', 'received', 'changed', 'postopts',
 402                         'plink', 'resource-id', 'event-id', 'tag', 'attach', 'inform',
 403                         'file', 'allow_cid', 'allow_gid', 'deny_cid', 'deny_gid',
 404                         'private', 'pubmail', 'moderated', 'visible', 'starred', 'bookmark',
 405                         'unseen', 'deleted', 'origin', 'forum_mode', 'mention', 'global',
 406                         'id' => 'item_id', 'network', 'icid'];
 407
 408                 $fields['item-content'] = self::CONTENT_FIELDLIST;
 409
 410                 $fields['author'] = ['url' => 'author-link', 'name' => 'author-name',
 411                         'thumb' => 'author-avatar', 'nick' => 'author-nick'];
 412
 413                 $fields['owner'] = ['url' => 'owner-link', 'name' => 'owner-name',
 414                         'thumb' => 'owner-avatar', 'nick' => 'owner-nick'];
 415
 416                 $fields['contact'] = ['url' => 'contact-link', 'name' => 'contact-name', 'thumb' => 'contact-avatar',
 417                         'writable', 'self', 'id' => 'cid', 'alias', 'uid' => 'contact-uid',
 418                         'photo', 'name-date', 'uri-date', 'avatar-date', 'thumb', 'dfrn-id'];
 419
 420                 $fields['parent-item'] = ['guid' => 'parent-guid', 'network' => 'parent-network'];
 421
 422                 $fields['parent-item-author'] = ['url' => 'parent-author-link', 'name' => 'parent-author-name'];
 423
 424                 $fields['event'] = ['created' => 'event-created', 'edited' => 'event-edited',
 425                         'start' => 'event-start','finish' => 'event-finish',
 426                         'summary' => 'event-summary','desc' => 'event-desc',
 427                         'location' => 'event-location', 'type' => 'event-type',
 428                         'nofinish' => 'event-nofinish','adjust' => 'event-adjust',
 429                         'ignore' => 'event-ignore', 'id' => 'event-id'];
 430
 431                 $fields['sign'] = ['signed_text', 'signature', 'signer'];
 432
 433                 return $fields;
 434         }
 435
 436         /**
 437          * @brief Returns SQL condition for the "select" functions
 438          *
 439          * @param boolean $thread_mode Called for the items (false) or for the threads (true)
 440          *
 441          * @return string SQL condition
 442          */
 443         private static function condition($thread_mode)
 444         {
 445                 if ($thread_mode) {
 446                         $master_table = "`thread`";
 447                 } else {
 448                         $master_table = "`item`";
 449                 }
 450                 return "$master_table.`visible` AND NOT $master_table.`deleted` AND NOT $master_table.`moderated` AND (`user-item`.`hidden` IS NULL OR NOT `user-item`.`hidden`) ";
 451         }
 452
 453         /**
 454          * @brief Returns all needed "JOIN" commands for the "select" functions
 455          *
 456          * @param integer $uid User ID
 457          * @param string $sql_commands The parts of the built SQL commands in the "select" functions
 458          * @param boolean $thread_mode Called for the items (false) or for the threads (true)
 459          *
 460          * @return string The SQL joins for the "select" functions
 461          */
 462         private static function constructJoins($uid, $sql_commands, $thread_mode)
 463         {
 464                 if ($thread_mode) {
 465                         $master_table = "`thread`";
 466                         $master_table_key = "`thread`.`iid`";
 467                         $joins = "STRAIGHT_JOIN `item` ON `item`.`id` = `thread`.`iid` ";
 468                 } else {
 469                         $master_table = "`item`";
 470                         $master_table_key = "`item`.`id`";
 471                         $joins = '';
 472                 }
 473
 474                 $joins .= sprintf("STRAIGHT_JOIN `contact` ON `contact`.`id` = $master_table.`contact-id`
 475                         AND NOT `contact`.`blocked`
 476                         AND ((NOT `contact`.`readonly` AND NOT `contact`.`pending` AND (`contact`.`rel` IN (%s, %s)))
 477                         OR `contact`.`self` OR (`item`.`id` != `item`.`parent`) OR `contact`.`uid` = 0)
 478                         STRAIGHT_JOIN `contact` AS `author` ON `author`.`id` = $master_table.`author-id` AND NOT `author`.`blocked`
 479                         STRAIGHT_JOIN `contact` AS `owner` ON `owner`.`id` = $master_table.`owner-id` AND NOT `owner`.`blocked`
 480                         LEFT JOIN `user-item` ON `user-item`.`iid` = $master_table_key AND `user-item`.`uid` = %d",
 481                         CONTACT_IS_SHARING, CONTACT_IS_FRIEND, intval($uid));
 482
 483                 if (strpos($sql_commands, "`group_member`.") !== false) {
 484                         $joins .= " STRAIGHT_JOIN `group_member` ON `group_member`.`contact-id` = $master_table.`contact-id`";
 485                 }
 486
 487                 if (strpos($sql_commands, "`user`.") !== false) {
 488                         $joins .= " STRAIGHT_JOIN `user` ON `user`.`uid` = $master_table.`uid`";
 489                 }
 490
 491                 if (strpos($sql_commands, "`event`.") !== false) {
 492                         $joins .= " LEFT JOIN `event` ON `event-id` = `event`.`id`";
 493                 }
 494
 495                 if (strpos($sql_commands, "`sign`.") !== false) {
 496                         $joins .= " LEFT JOIN `sign` ON `sign`.`iid` = `item`.`id`";
 497                 }
 498
 499                 if (strpos($sql_commands, "`item-content`.") !== false) {
 500                         $joins .= " LEFT JOIN `item-content` ON `item-content`.`id` = `item`.`icid`";
 501                 }
 502
 503                 if ((strpos($sql_commands, "`parent-item`.") !== false) || (strpos($sql_commands, "`parent-author`.") !== false)) {
 504                         $joins .= " STRAIGHT_JOIN `item` AS `parent-item` ON `parent-item`.`id` = `item`.`parent`";
 505                 }
 506
 507                 if (strpos($sql_commands, "`parent-item-author`.") !== false) {
 508                         $joins .= " STRAIGHT_JOIN `contact` AS `parent-item-author` ON `parent-item-author`.`id` = `parent-item`.`author-id`";
 509                 }
 510
 511                 return $joins;
 512         }
 513
 514         /**
 515          * @brief Add the field list for the "select" functions
 516          *
 517          * @param array $fields The field definition array
 518          * @param array $selected The array with the selected fields from the "select" functions
 519          *
 520          * @return string The field list
 521          */
 522         private static function constructSelectFields($fields, $selected)
 523         {
 524                 $selection = [];
 525                 foreach ($fields as $table => $table_fields) {
 526                         foreach ($table_fields as $field => $select) {
 527                                 if (empty($selected) || in_array($select, $selected)) {
 528                                         if (in_array($select, self::CONTENT_FIELDLIST)) {
 529                                                 $selection[] = "`item`.`".$select."` AS `item-" . $select . "`";
 530                                         }
 531                                         if (is_int($field)) {
 532                                                 $selection[] = "`" . $table . "`.`" . $select . "`";
 533                                         } else {
 534                                                 $selection[] = "`" . $table . "`.`" . $field . "` AS `" . $select . "`";
 535                                         }
 536                                 }
 537                         }
 538                 }
 539                 return implode(", ", $selection);
 540         }
 541
 542         /**
 543          * @brief add table definition to fields in an SQL query
 544          *
 545          * @param string $query SQL query
 546          * @param array $fields The field definition array
 547          *
 548          * @return string the changed SQL query
 549          */
 550         private static function addTablesToFields($query, $fields)
 551         {
 552                 foreach ($fields as $table => $table_fields) {
 553                         foreach ($table_fields as $alias => $field) {
 554                                 if (is_int($alias)) {
 555                                         $replace_field = $field;
 556                                 } else {
 557                                         $replace_field = $alias;
 558                                 }
 559
 560                                 $search = "/([^\.])`" . $field . "`/i";
 561                                 $replace = "$1`" . $table . "`.`" . $replace_field . "`";
 562                                 $query = preg_replace($search, $replace, $query);
 563                         }
 564                 }
 565                 return $query;
 566         }
 567
 568         /**
 569          * @brief Update existing item entries
 570          *
 571          * @param array $fields The fields that are to be changed
 572          * @param array $condition The condition for finding the item entries
 573          *
 574          * In the future we may have to change permissions as well.
 575          * Then we had to add the user id as third parameter.
 576          *
 577          * A return value of "0" doesn't mean an error - but that 0 rows had been changed.
 578          *
 579          * @return integer|boolean number of affected rows - or "false" if there was an error
 580          */
 581         public static function update(array $fields, array $condition)
 582         {
 583                 if (empty($condition) || empty($fields)) {
 584                         return false;
 585                 }
 586
 587                 // To ensure the data integrity we do it in an transaction
 588                 dba::transaction();
 589
 590                 // We cannot simply expand the condition to check for origin entries
 591                 // The condition needn't to be a simple array but could be a complex condition.
 592                 // And we have to execute this query before the update to ensure to fetch the same data.
 593                 $items = dba::select('item', ['id', 'origin', 'uri', 'plink'], $condition);
 594
 595                 $content_fields = [];
 596                 foreach (self::CONTENT_FIELDLIST as $field) {
 597                         if (isset($fields[$field])) {
 598                                 $content_fields[$field] = $fields[$field];
 599                                 unset($fields[$field]);
 600                         }
 601                 }
 602
 603                 if (!empty($fields)) {
 604                         $success = dba::update('item', $fields, $condition);
 605
 606                         if (!$success) {
 607                                 dba::close($items);
 608                                 dba::rollback();
 609                                 return false;
 610                         }
 611                 }
 612
 613                 // When there is no content for the "old" item table, this will count the fetched items
 614                 $rows = dba::affected_rows();
 615
 616                 while ($item = dba::fetch($items)) {
 617                         if (!empty($item['plink'])) {
 618                                 $content_fields['plink'] =  $item['plink'];
 619                         }
 620                         self::updateContent($content_fields, ['uri' => $item['uri']]);
 621                         Term::insertFromTagFieldByItemId($item['id']);
 622                         Term::insertFromFileFieldByItemId($item['id']);
 623                         self::updateThread($item['id']);
 624
 625                         // We only need to notfiy others when it is an original entry from us.
 626                         // Only call the notifier when the item has some content relevant change.
 627                         if ($item['origin'] && in_array('edited', array_keys($fields))) {
 628                                 Worker::add(PRIORITY_HIGH, "Notifier", 'edit_post', $item['id']);
 629                         }
 630                 }
 631
 632                 dba::close($items);
 633                 dba::commit();
 634                 return $rows;
 635         }
 636
 637         /**
 638          * @brief Delete an item and notify others about it - if it was ours
 639          *
 640          * @param array $condition The condition for finding the item entries
 641          * @param integer $priority Priority for the notification
 642          */
 643         public static function delete($condition, $priority = PRIORITY_HIGH)
 644         {
 645                 $items = dba::select('item', ['id'], $condition);
 646                 while ($item = dba::fetch($items)) {
 647                         self::deleteById($item['id'], $priority);
 648                 }
 649                 dba::close($items);
 650         }
 651
 652         /**
 653          * @brief Delete an item for an user and notify others about it - if it was ours
 654          *
 655          * @param array $condition The condition for finding the item entries
 656          * @param integer $uid User who wants to delete this item
 657          */
 658         public static function deleteForUser($condition, $uid)
 659         {
 660                 if ($uid == 0) {
 661                         return;
 662                 }
 663
 664                 $items = dba::select('item', ['id', 'uid'], $condition);
 665                 while ($item = dba::fetch($items)) {
 666                         // "Deleting" global items just means hiding them
 667                         if ($item['uid'] == 0) {
 668                                 dba::update('user-item', ['hidden' => true], ['iid' => $item['id'], 'uid' => $uid], true);
 669                         } elseif ($item['uid'] == $uid) {
 670                                 self::deleteById($item['id'], PRIORITY_HIGH);
 671                         } else {
 672                                 logger('Wrong ownership. Not deleting item ' . $item['id']);
 673                         }
 674                 }
 675                 dba::close($items);
 676         }
 677
 678         /**
 679          * @brief Delete an item and notify others about it - if it was ours
 680          *
 681          * @param integer $item_id Item ID that should be delete
 682          * @param integer $priority Priority for the notification
 683          *
 684          * @return boolean success
 685          */
 686         private static function deleteById($item_id, $priority = PRIORITY_HIGH)
 687         {
 688                 // locate item to be deleted
 689                 $fields = ['id', 'uri', 'uid', 'parent', 'parent-uri', 'origin',
 690                         'deleted', 'file', 'resource-id', 'event-id', 'attach',
 691                         'verb', 'object-type', 'object', 'target', 'contact-id'];
 692                 $item = dba::selectFirst('item', $fields, ['id' => $item_id]);
 693                 if (!DBM::is_result($item)) {
 694                         logger('Item with ID ' . $item_id . " hasn't been found.", LOGGER_DEBUG);
 695                         return false;
 696                 }
 697
 698                 if ($item['deleted']) {
 699                         logger('Item with ID ' . $item_id . ' has already been deleted.', LOGGER_DEBUG);
 700                         return false;
 701                 }
 702
 703                 $parent = dba::selectFirst('item', ['origin'], ['id' => $item['parent']]);
 704                 if (!DBM::is_result($parent)) {
 705                         $parent = ['origin' => false];
 706                 }
 707
 708                 // clean up categories and tags so they don't end up as orphans
 709
 710                 $matches = false;
 711                 $cnt = preg_match_all('/<(.*?)>/', $item['file'], $matches, PREG_SET_ORDER);
 712                 if ($cnt) {
 713                         foreach ($matches as $mtch) {
 714                                 file_tag_unsave_file($item['uid'], $item['id'], $mtch[1],true);
 715                         }
 716                 }
 717
 718                 $matches = false;
 719
 720                 $cnt = preg_match_all('/\[(.*?)\]/', $item['file'], $matches, PREG_SET_ORDER);
 721                 if ($cnt) {
 722                         foreach ($matches as $mtch) {
 723                                 file_tag_unsave_file($item['uid'], $item['id'], $mtch[1],false);
 724                         }
 725                 }
 726
 727                 /*
 728                  * If item is a link to a photo resource, nuke all the associated photos
 729                  * (visitors will not have photo resources)
 730                  * This only applies to photos uploaded from the photos page. Photos inserted into a post do not
 731                  * generate a resource-id and therefore aren't intimately linked to the item.
 732                  */
 733                 if (strlen($item['resource-id'])) {
 734                         dba::delete('photo', ['resource-id' => $item['resource-id'], 'uid' => $item['uid']]);
 735                 }
 736
 737                 // If item is a link to an event, delete the event.
 738                 if (intval($item['event-id'])) {
 739                         Event::delete($item['event-id']);
 740                 }
 741
 742                 // If item has attachments, drop them
 743                 foreach (explode(", ", $item['attach']) as $attach) {
 744                         preg_match("|attach/(\d+)|", $attach, $matches);
 745                         dba::delete('attach', ['id' => $matches[1], 'uid' => $item['uid']]);
 746                 }
 747
 748                 // Delete tags that had been attached to other items
 749                 self::deleteTagsFromItem($item);
 750
 751                 // Set the item to "deleted"
 752                 dba::update('item', ['deleted' => true, 'edited' => DateTimeFormat::utcNow(), 'changed' => DateTimeFormat::utcNow()],
 753                                 ['id' => $item['id']]);
 754
 755                 Term::insertFromTagFieldByItemId($item['id']);
 756                 Term::insertFromFileFieldByItemId($item['id']);
 757                 self::deleteThread($item['id'], $item['parent-uri']);
 758
 759                 if (!self::exists(["`uri` = ? AND `uid` != 0 AND NOT `deleted`", $item['uri']])) {
 760                         self::delete(['uri' => $item['uri'], 'uid' => 0, 'deleted' => false], $priority);
 761                 }
 762
 763                 // If it's the parent of a comment thread, kill all the kids
 764                 if ($item['id'] == $item['parent']) {
 765                         self::delete(['parent' => $item['parent'], 'deleted' => false], $priority);
 766                 }
 767
 768                 // Is it our comment and/or our thread?
 769                 if ($item['origin'] || $parent['origin']) {
 770
 771                         // When we delete the original post we will delete all existing copies on the server as well
 772                         self::delete(['uri' => $item['uri'], 'deleted' => false], $priority);
 773
 774                         // send the notification upstream/downstream
 775                         Worker::add(['priority' => $priority, 'dont_fork' => true], "Notifier", "drop", intval($item['id']));
 776                 } elseif ($item['uid'] != 0) {
 777
 778                         // When we delete just our local user copy of an item, we have to set a marker to hide it
 779                         $global_item = dba::selectFirst('item', ['id'], ['uri' => $item['uri'], 'uid' => 0, 'deleted' => false]);
 780                         if (DBM::is_result($global_item)) {
 781                                 dba::update('user-item', ['hidden' => true], ['iid' => $global_item['id'], 'uid' => $item['uid']], true);
 782                         }
 783                 }
 784
 785                 logger('Item with ID ' . $item_id . " has been deleted.", LOGGER_DEBUG);
 786
 787                 return true;
 788         }
 789
 790         private static function deleteTagsFromItem($item)
 791         {
 792                 if (($item["verb"] != ACTIVITY_TAG) || ($item["object-type"] != ACTIVITY_OBJ_TAGTERM)) {
 793                         return;
 794                 }
 795
 796                 $xo = XML::parseString($item["object"], false);
 797                 $xt = XML::parseString($item["target"], false);
 798
 799                 if ($xt->type != ACTIVITY_OBJ_NOTE) {
 800                         return;
 801                 }
 802
 803                 $i = dba::selectFirst('item', ['id', 'contact-id', 'tag'], ['uri' => $xt->id, 'uid' => $item['uid']]);
 804                 if (!DBM::is_result($i)) {
 805                         return;
 806                 }
 807
 808                 // For tags, the owner cannot remove the tag on the author's copy of the post.
 809                 $owner_remove = ($item["contact-id"] == $i["contact-id"]);
 810                 $author_copy = $item["origin"];
 811
 812                 if (($owner_remove && $author_copy) || !$owner_remove) {
 813                         return;
 814                 }
 815
 816                 $tags = explode(',', $i["tag"]);
 817                 $newtags = [];
 818                 if (count($tags)) {
 819                         foreach ($tags as $tag) {
 820                                 if (trim($tag) !== trim($xo->body)) {
 821                                        $newtags[] = trim($tag);
 822                                 }
 823                         }
 824                 }
 825                 self::update(['tag' => implode(',', $newtags)], ['id' => $i["id"]]);
 826         }
 827
 828         private static function guid($item, $notify)
 829         {
 830                 $guid = notags(trim($item['guid']));
 831
 832                 if (!empty($guid)) {
 833                         return $guid;
 834                 }
 835
 836                 if ($notify) {
 837                         // We have to avoid duplicates. So we create the GUID in form of a hash of the plink or uri.
 838                         // We add the hash of our own host because our host is the original creator of the post.
 839                         $prefix_host = get_app()->get_hostname();
 840                 } else {
 841                         $prefix_host = '';
 842
 843                         // We are only storing the post so we create a GUID from the original hostname.
 844                         if (!empty($item['author-link'])) {
 845                                 $parsed = parse_url($item['author-link']);
 846                                 if (!empty($parsed['host'])) {
 847                                         $prefix_host = $parsed['host'];
 848                                 }
 849                         }
 850
 851                         if (empty($prefix_host) && !empty($item['plink'])) {
 852                                 $parsed = parse_url($item['plink']);
 853                                 if (!empty($parsed['host'])) {
 854                                         $prefix_host = $parsed['host'];
 855                                 }
 856                         }
 857
 858                         if (empty($prefix_host) && !empty($item['uri'])) {
 859                                 $parsed = parse_url($item['uri']);
 860                                 if (!empty($parsed['host'])) {
 861                                         $prefix_host = $parsed['host'];
 862                                 }
 863                         }
 864
 865                         // Is it in the format data@host.tld? - Used for mail contacts
 866                         if (empty($prefix_host) && !empty($item['author-link']) && strstr($item['author-link'], '@')) {
 867                                 $mailparts = explode('@', $item['author-link']);
 868                                 $prefix_host = array_pop($mailparts);
 869                         }
 870                 }
 871
 872                 if (!empty($item['plink'])) {
 873                         $guid = self::guidFromUri($item['plink'], $prefix_host);
 874                 } elseif (!empty($item['uri'])) {
 875                         $guid = self::guidFromUri($item['uri'], $prefix_host);
 876                 } else {
 877                         $guid = get_guid(32, hash('crc32', $prefix_host));
 878                 }
 879
 880                 return $guid;
 881         }
 882
 883         private static function contactId($item)
 884         {
 885                 $contact_id = (int)$item["contact-id"];
 886
 887                 if (!empty($contact_id)) {
 888                         return $contact_id;
 889                 }
 890                 logger('Missing contact-id. Called by: '.System::callstack(), LOGGER_DEBUG);
 891                 /*
 892                  * First we are looking for a suitable contact that matches with the author of the post
 893                  * This is done only for comments
 894                  */
 895                 if ($item['parent-uri'] != $item['uri']) {
 896                         $contact_id = Contact::getIdForURL($item['author-link'], $item['uid']);
 897                 }
 898
 899                 // If not present then maybe the owner was found
 900                 if ($contact_id == 0) {
 901                         $contact_id = Contact::getIdForURL($item['owner-link'], $item['uid']);
 902                 }
 903
 904                 // Still missing? Then use the "self" contact of the current user
 905                 if ($contact_id == 0) {
 906                         $self = dba::selectFirst('contact', ['id'], ['self' => true, 'uid' => $item['uid']]);
 907                         if (DBM::is_result($self)) {
 908                                 $contact_id = $self["id"];
 909                         }
 910                 }
 911                 logger("Contact-id was missing for post ".$item['guid']." from user id ".$item['uid']." - now set to ".$contact_id, LOGGER_DEBUG);
 912
 913                 return $contact_id;
 914         }
 915
 916         public static function insert($item, $force_parent = false, $notify = false, $dontcache = false)
 917         {
 918                 $a = get_app();
 919
 920                 // If it is a posting where users should get notifications, then define it as wall posting
 921                 if ($notify) {
 922                         $item['wall'] = 1;
 923                         $item['type'] = 'wall';
 924                         $item['origin'] = 1;
 925                         $item['network'] = NETWORK_DFRN;
 926                         $item['protocol'] = PROTOCOL_DFRN;
 927
 928                         if (is_int($notify)) {
 929                                 $priority = $notify;
 930                         } else {
 931                                 $priority = PRIORITY_HIGH;
 932                         }
 933                 } else {
 934                         $item['network'] = trim(defaults($item, 'network', NETWORK_PHANTOM));
 935                 }
 936
 937                 $item['guid'] = self::guid($item, $notify);
 938                 $item['uri'] = notags(trim(defaults($item, 'uri', self::newURI($item['uid'], $item['guid']))));
 939
 940                 // Store conversation data
 941                 $item = Conversation::insert($item);
 942
 943                 /*
 944                  * If a Diaspora signature structure was passed in, pull it out of the
 945                  * item array and set it aside for later storage.
 946                  */
 947
 948                 $dsprsig = null;
 949                 if (x($item, 'dsprsig')) {
 950                         $encoded_signature = $item['dsprsig'];
 951                         $dsprsig = json_decode(base64_decode($item['dsprsig']));
 952                         unset($item['dsprsig']);
 953                 }
 954
 955                 if (!empty($item['diaspora_signed_text'])) {
 956                         $diaspora_signed_text = $item['diaspora_signed_text'];
 957                         unset($item['diaspora_signed_text']);
 958                 } else {
 959                         $diaspora_signed_text = '';
 960                 }
 961
 962                 // Converting the plink
 963                 /// @TODO Check if this is really still needed
 964                 if ($item['network'] == NETWORK_OSTATUS) {
 965                         if (isset($item['plink'])) {
 966                                 $item['plink'] = OStatus::convertHref($item['plink']);
 967                         } elseif (isset($item['uri'])) {
 968                                 $item['plink'] = OStatus::convertHref($item['uri']);
 969                         }
 970                 }
 971
 972                 if (!empty($item['thr-parent'])) {
 973                         $item['parent-uri'] = $item['thr-parent'];
 974                 }
 975
 976                 $item['type'] = defaults($item, 'type', 'remote');
 977
 978                 if (isset($item['gravity'])) {
 979                         $item['gravity'] = intval($item['gravity']);
 980                 } elseif ($item['parent-uri'] === $item['uri']) {
 981                         $item['gravity'] = GRAVITY_PARENT;
 982                 } elseif (activity_match($item['verb'], ACTIVITY_POST)) {
 983                         $item['gravity'] = GRAVITY_COMMENT;
 984                 } elseif ($item['type'] == 'activity') {
 985                         $item['gravity'] = GRAVITY_ACTIVITY;
 986                 } else {
 987                         $item['gravity'] = GRAVITY_UNKNOWN;   // Should not happen
 988                         logger('Unknown gravity for verb: ' . $item['verb'] . ' - type: ' . $item['type'], LOGGER_DEBUG);
 989                 }
 990
 991                 $uid = intval($item['uid']);
 992
 993                 // check for create date and expire time
 994                 $expire_interval = Config::get('system', 'dbclean-expire-days', 0);
 995
 996                 $user = dba::selectFirst('user', ['expire'], ['uid' => $uid]);
 997                 if (DBM::is_result($user) && ($user['expire'] > 0) && (($user['expire'] < $expire_interval) || ($expire_interval == 0))) {
 998                         $expire_interval = $user['expire'];
 999                 }
1000
1001                 if (($expire_interval > 0) && !empty($item['created'])) {
1002                         $expire_date = time() - ($expire_interval * 86400);
1003                         $created_date = strtotime($item['created']);
1004                         if ($created_date < $expire_date) {
1005                                 logger('item-store: item created ('.date('c', $created_date).') before expiration time ('.date('c', $expire_date).'). ignored. ' . print_r($item,true), LOGGER_DEBUG);
1006                                 return 0;
1007                         }
1008                 }
1009
1010                 /*
1011                  * Do we already have this item?
1012                  * We have to check several networks since Friendica posts could be repeated
1013                  * via OStatus (maybe Diasporsa as well)
1014                  */
1015                 if (in_array($item['network'], [NETWORK_DIASPORA, NETWORK_DFRN, NETWORK_OSTATUS, ""])) {
1016                         $condition = ["`uri` = ? AND `uid` = ? AND `network` IN (?, ?, ?)",
1017                                 trim($item['uri']), $item['uid'],
1018                                 NETWORK_DIASPORA, NETWORK_DFRN, NETWORK_OSTATUS];
1019                         $existing = dba::selectFirst('item', ['id', 'network'], $condition);
1020                         if (DBM::is_result($existing)) {
1021                                 // We only log the entries with a different user id than 0. Otherwise we would have too many false positives
1022                                 if ($uid != 0) {
1023                                         logger("Item with uri ".$item['uri']." already existed for user ".$uid." with id ".$existing["id"]." target network ".$existing["network"]." - new network: ".$item['network']);
1024                                 }
1025
1026                                 return $existing["id"];
1027                         }
1028                 }
1029
1030                 self::addLanguageInPostopts($item);
1031
1032                 $item['wall']          = intval(defaults($item, 'wall', 0));
1033                 $item['extid']         = trim(defaults($item, 'extid', ''));
1034                 $item['author-name']   = trim(defaults($item, 'author-name', ''));
1035                 $item['author-link']   = trim(defaults($item, 'author-link', ''));
1036                 $item['author-avatar'] = trim(defaults($item, 'author-avatar', ''));
1037                 $item['owner-name']    = trim(defaults($item, 'owner-name', ''));
1038                 $item['owner-link']    = trim(defaults($item, 'owner-link', ''));
1039                 $item['owner-avatar']  = trim(defaults($item, 'owner-avatar', ''));
1040                 $item['received']      = ((x($item, 'received') !== false) ? DateTimeFormat::utc($item['received']) : DateTimeFormat::utcNow());
1041                 $item['created']       = ((x($item, 'created') !== false) ? DateTimeFormat::utc($item['created']) : $item['received']);
1042                 $item['edited']        = ((x($item, 'edited') !== false) ? DateTimeFormat::utc($item['edited']) : $item['created']);
1043                 $item['changed']       = ((x($item, 'changed') !== false) ? DateTimeFormat::utc($item['changed']) : $item['created']);
1044                 $item['commented']     = ((x($item, 'commented') !== false) ? DateTimeFormat::utc($item['commented']) : $item['created']);
1045                 $item['title']         = trim(defaults($item, 'title', ''));
1046                 $item['location']      = trim(defaults($item, 'location', ''));
1047                 $item['coord']         = trim(defaults($item, 'coord', ''));
1048                 $item['visible']       = ((x($item, 'visible') !== false) ? intval($item['visible'])         : 1);
1049                 $item['deleted']       = 0;
1050                 $item['parent-uri']    = trim(defaults($item, 'parent-uri', $item['uri']));
1051                 $item['verb']          = trim(defaults($item, 'verb', ''));
1052                 $item['object-type']   = trim(defaults($item, 'object-type', ''));
1053                 $item['object']        = trim(defaults($item, 'object', ''));
1054                 $item['target-type']   = trim(defaults($item, 'target-type', ''));
1055                 $item['target']        = trim(defaults($item, 'target', ''));
1056                 $item['plink']         = trim(defaults($item, 'plink', ''));
1057                 $item['allow_cid']     = trim(defaults($item, 'allow_cid', ''));
1058                 $item['allow_gid']     = trim(defaults($item, 'allow_gid', ''));
1059                 $item['deny_cid']      = trim(defaults($item, 'deny_cid', ''));
1060                 $item['deny_gid']      = trim(defaults($item, 'deny_gid', ''));
1061                 $item['private']       = intval(defaults($item, 'private', 0));
1062                 $item['bookmark']      = intval(defaults($item, 'bookmark', 0));
1063                 $item['body']          = trim(defaults($item, 'body', ''));
1064                 $item['tag']           = trim(defaults($item, 'tag', ''));
1065                 $item['attach']        = trim(defaults($item, 'attach', ''));
1066                 $item['app']           = trim(defaults($item, 'app', ''));
1067                 $item['origin']        = intval(defaults($item, 'origin', 0));
1068                 $item['postopts']      = trim(defaults($item, 'postopts', ''));
1069                 $item['resource-id']   = trim(defaults($item, 'resource-id', ''));
1070                 $item['event-id']      = intval(defaults($item, 'event-id', 0));
1071                 $item['inform']        = trim(defaults($item, 'inform', ''));
1072                 $item['file']          = trim(defaults($item, 'file', ''));
1073
1074                 // When there is no content then we don't post it
1075                 if ($item['body'].$item['title'] == '') {
1076                         logger('No body, no title.');
1077                         return 0;
1078                 }
1079
1080                 // Items cannot be stored before they happen ...
1081                 if ($item['created'] > DateTimeFormat::utcNow()) {
1082                         $item['created'] = DateTimeFormat::utcNow();
1083                 }
1084
1085                 // We haven't invented time travel by now.
1086                 if ($item['edited'] > DateTimeFormat::utcNow()) {
1087                         $item['edited'] = DateTimeFormat::utcNow();
1088                 }
1089
1090                 if (($item['author-link'] == "") && ($item['owner-link'] == "")) {
1091                         logger("Both author-link and owner-link are empty. Called by: " . System::callstack(), LOGGER_DEBUG);
1092                 }
1093
1094                 $item['plink'] = defaults($item, 'plink', System::baseUrl() . '/display/' . urlencode($item['guid']));
1095
1096                 // The contact-id should be set before "self::insert" was called - but there seems to be issues sometimes
1097                 $item["contact-id"] = self::contactId($item);
1098
1099                 $default = ['url' => $item['author-link'], 'name' => $item['author-name'],
1100                         'photo' => $item['author-avatar'], 'network' => $item['network']];
1101
1102                 $item['author-id'] = defaults($item, 'author-id', Contact::getIdForURL($item["author-link"], 0, false, $default));
1103
1104                 if (Contact::isBlocked($item["author-id"])) {
1105                         logger('Contact '.$item["author-id"].' is blocked, item '.$item["uri"].' will not be stored');
1106                         return 0;
1107                 }
1108
1109                 $default = ['url' => $item['owner-link'], 'name' => $item['owner-name'],
1110                         'photo' => $item['owner-avatar'], 'network' => $item['network']];
1111
1112                 $item['owner-id'] = defaults($item, 'owner-id', Contact::getIdForURL($item["owner-link"], 0, false, $default));
1113
1114                 if (Contact::isBlocked($item["owner-id"])) {
1115                         logger('Contact '.$item["owner-id"].' is blocked, item '.$item["uri"].' will not be stored');
1116                         return 0;
1117                 }
1118
1119                 // These fields aren't stored anymore in the item table, they are fetched upon request
1120                 unset($item['author-link']);
1121                 unset($item['author-name']);
1122                 unset($item['author-avatar']);
1123
1124                 unset($item['owner-link']);
1125                 unset($item['owner-name']);
1126                 unset($item['owner-avatar']);
1127
1128                 if ($item['network'] == NETWORK_PHANTOM) {
1129                         logger('Missing network. Called by: '.System::callstack(), LOGGER_DEBUG);
1130
1131                         $contact = Contact::getDetailsByURL($item['author-link'], $item['uid']);
1132                         if (!empty($contact['network'])) {
1133                                 $item['network'] = $contact["network"];
1134                         } else {
1135                                 $item['network'] = NETWORK_DFRN;
1136                         }
1137                         logger("Set network to " . $item["network"] . " for " . $item["uri"], LOGGER_DEBUG);
1138                 }
1139
1140                 // Checking if there is already an item with the same guid
1141                 logger('Checking for an item for user '.$item['uid'].' on network '.$item['network'].' with the guid '.$item['guid'], LOGGER_DEBUG);
1142                 $condition = ['guid' => $item['guid'], 'network' => $item['network'], 'uid' => $item['uid']];
1143                 if (self::exists($condition)) {
1144                         logger('found item with guid '.$item['guid'].' for user '.$item['uid'].' on network '.$item['network'], LOGGER_DEBUG);
1145                         return 0;
1146                 }
1147
1148                 // Check for hashtags in the body and repair or add hashtag links
1149                 self::setHashtags($item);
1150
1151                 $item['thr-parent'] = $item['parent-uri'];
1152
1153                 $notify_type = '';
1154                 $allow_cid = '';
1155                 $allow_gid = '';
1156                 $deny_cid  = '';
1157                 $deny_gid  = '';
1158
1159                 if ($item['parent-uri'] === $item['uri']) {
1160                         $parent_id = 0;
1161                         $parent_deleted = 0;
1162                         $allow_cid = $item['allow_cid'];
1163                         $allow_gid = $item['allow_gid'];
1164                         $deny_cid  = $item['deny_cid'];
1165                         $deny_gid  = $item['deny_gid'];
1166                         $notify_type = 'wall-new';
1167                 } else {
1168                         // find the parent and snarf the item id and ACLs
1169                         // and anything else we need to inherit
1170
1171                         $fields = ['uri', 'parent-uri', 'id', 'deleted',
1172                                 'allow_cid', 'allow_gid', 'deny_cid', 'deny_gid',
1173                                 'wall', 'private', 'forum_mode', 'origin'];
1174                         $condition = ['uri' => $item['parent-uri'], 'uid' => $item['uid']];
1175                         $params = ['order' => ['id' => false]];
1176                         $parent = dba::selectFirst('item', $fields, $condition, $params);
1177
1178                         if (DBM::is_result($parent)) {
1179                                 // is the new message multi-level threaded?
1180                                 // even though we don't support it now, preserve the info
1181                                 // and re-attach to the conversation parent.
1182
1183                                 if ($parent['uri'] != $parent['parent-uri']) {
1184                                         $item['parent-uri'] = $parent['parent-uri'];
1185
1186                                         $condition = ['uri' => $item['parent-uri'],
1187                                                 'parent-uri' => $item['parent-uri'],
1188                                                 'uid' => $item['uid']];
1189                                         $params = ['order' => ['id' => false]];
1190                                         $toplevel_parent = dba::selectFirst('item', $fields, $condition, $params);
1191
1192                                         if (DBM::is_result($toplevel_parent)) {
1193                                                 $parent = $toplevel_parent;
1194                                         }
1195                                 }
1196
1197                                 $parent_id      = $parent['id'];
1198                                 $parent_deleted = $parent['deleted'];
1199                                 $allow_cid      = $parent['allow_cid'];
1200                                 $allow_gid      = $parent['allow_gid'];
1201                                 $deny_cid       = $parent['deny_cid'];
1202                                 $deny_gid       = $parent['deny_gid'];
1203                                 $item['wall']    = $parent['wall'];
1204                                 $notify_type    = 'comment-new';
1205
1206                                 /*
1207                                  * If the parent is private, force privacy for the entire conversation
1208                                  * This differs from the above settings as it subtly allows comments from
1209                                  * email correspondents to be private even if the overall thread is not.
1210                                  */
1211                                 if ($parent['private']) {
1212                                         $item['private'] = $parent['private'];
1213                                 }
1214
1215                                 /*
1216                                  * Edge case. We host a public forum that was originally posted to privately.
1217                                  * The original author commented, but as this is a comment, the permissions
1218                                  * weren't fixed up so it will still show the comment as private unless we fix it here.
1219                                  */
1220                                 if ((intval($parent['forum_mode']) == 1) && $parent['private']) {
1221                                         $item['private'] = 0;
1222                                 }
1223
1224                                 // If its a post from myself then tag the thread as "mention"
1225                                 logger("Checking if parent ".$parent_id." has to be tagged as mention for user ".$item['uid'], LOGGER_DEBUG);
1226                                 $user = dba::selectFirst('user', ['nickname'], ['uid' => $item['uid']]);
1227                                 if (DBM::is_result($user)) {
1228                                         $self = normalise_link(System::baseUrl() . '/profile/' . $user['nickname']);
1229                                         $self_id = Contact::getIdForURL($self, 0, true);
1230                                         logger("'myself' is ".$self_id." for parent ".$parent_id." checking against ".$item['author-id']." and ".$item['owner-id'], LOGGER_DEBUG);
1231                                         if (($item['author-id'] == $self_id) || ($item['owner-id'] == $self_id)) {
1232                                                 dba::update('thread', ['mention' => true], ['iid' => $parent_id]);
1233                                                 logger("tagged thread ".$parent_id." as mention for user ".$self, LOGGER_DEBUG);
1234                                         }
1235                                 }
1236                         } else {
1237                                 /*
1238                                  * Allow one to see reply tweets from status.net even when
1239                                  * we don't have or can't see the original post.
1240                                  */
1241                                 if ($force_parent) {
1242                                         logger('$force_parent=true, reply converted to top-level post.');
1243                                         $parent_id = 0;
1244                                         $item['parent-uri'] = $item['uri'];
1245                                         $item['gravity'] = GRAVITY_PARENT;
1246                                 } else {
1247                                         logger('item parent '.$item['parent-uri'].' for '.$item['uid'].' was not found - ignoring item');
1248                                         return 0;
1249                                 }
1250
1251                                 $parent_deleted = 0;
1252                         }
1253                 }
1254
1255                 $condition = ["`uri` = ? AND `network` IN (?, ?) AND `uid` = ?",
1256                         $item['uri'], $item['network'], NETWORK_DFRN, $item['uid']];
1257                 if (self::exists($condition)) {
1258                         logger('duplicated item with the same uri found. '.print_r($item,true));
1259                         return 0;
1260                 }
1261
1262                 // On Friendica and Diaspora the GUID is unique
1263                 if (in_array($item['network'], [NETWORK_DFRN, NETWORK_DIASPORA])) {
1264                         $condition = ['guid' => $item['guid'], 'uid' => $item['uid']];
1265                         if (self::exists($condition)) {
1266                                 logger('duplicated item with the same guid found. '.print_r($item,true));
1267                                 return 0;
1268                         }
1269                 } else {
1270                         // Check for an existing post with the same content. There seems to be a problem with OStatus.
1271                         $condition = ["`body` = ? AND `network` = ? AND `created` = ? AND `contact-id` = ? AND `uid` = ?",
1272                                         $item['body'], $item['network'], $item['created'], $item['contact-id'], $item['uid']];
1273                         if (self::exists($condition)) {
1274                                 logger('duplicated item with the same body found. '.print_r($item,true));
1275                                 return 0;
1276                         }
1277                 }
1278
1279                 // Is this item available in the global items (with uid=0)?
1280                 if ($item["uid"] == 0) {
1281                         $item["global"] = true;
1282
1283                         // Set the global flag on all items if this was a global item entry
1284                         dba::update('item', ['global' => true], ['uri' => $item["uri"]]);
1285                 } else {
1286                         $item["global"] = self::exists(['uid' => 0, 'uri' => $item["uri"]]);
1287                 }
1288
1289                 // ACL settings
1290                 if (strlen($allow_cid) || strlen($allow_gid) || strlen($deny_cid) || strlen($deny_gid)) {
1291                         $private = 1;
1292                 } else {
1293                         $private = $item['private'];
1294                 }
1295
1296                 $item["allow_cid"] = $allow_cid;
1297                 $item["allow_gid"] = $allow_gid;
1298                 $item["deny_cid"] = $deny_cid;
1299                 $item["deny_gid"] = $deny_gid;
1300                 $item["private"] = $private;
1301                 $item["deleted"] = $parent_deleted;
1302
1303                 // Fill the cache field
1304                 put_item_in_cache($item);
1305
1306                 if ($notify) {
1307                         Addon::callHooks('post_local', $item);
1308                 } else {
1309                         Addon::callHooks('post_remote', $item);
1310                 }
1311
1312                 // This array field is used to trigger some automatic reactions
1313                 // It is mainly used in the "post_local" hook.
1314                 unset($item['api_source']);
1315
1316                 if (x($item, 'cancel')) {
1317                         logger('post cancelled by addon.');
1318                         return 0;
1319                 }
1320
1321                 /*
1322                  * Check for already added items.
1323                  * There is a timing issue here that sometimes creates double postings.
1324                  * An unique index would help - but the limitations of MySQL (maximum size of index values) prevent this.
1325                  */
1326                 if ($item["uid"] == 0) {
1327                         if (self::exists(['uri' => trim($item['uri']), 'uid' => 0])) {
1328                                 logger('Global item already stored. URI: '.$item['uri'].' on network '.$item['network'], LOGGER_DEBUG);
1329                                 return 0;
1330                         }
1331                 }
1332
1333                 logger('' . print_r($item,true), LOGGER_DATA);
1334
1335                 dba::transaction();
1336                 self::insertContent($item);
1337                 $ret = dba::insert('item', $item);
1338
1339                 // When the item was successfully stored we fetch the ID of the item.
1340                 if (DBM::is_result($ret)) {
1341                         $current_post = dba::lastInsertId();
1342                 } else {
1343                         // This can happen - for example - if there are locking timeouts.
1344                         dba::rollback();
1345
1346                         // Store the data into a spool file so that we can try again later.
1347
1348                         // At first we restore the Diaspora signature that we removed above.
1349                         if (isset($encoded_signature)) {
1350                                 $item['dsprsig'] = $encoded_signature;
1351                         }
1352
1353                         // Now we store the data in the spool directory
1354                         // We use "microtime" to keep the arrival order and "mt_rand" to avoid duplicates
1355                         $file = 'item-'.round(microtime(true) * 10000).'-'.mt_rand().'.msg';
1356
1357                         $spoolpath = get_spoolpath();
1358                         if ($spoolpath != "") {
1359                                 $spool = $spoolpath.'/'.$file;
1360                                 file_put_contents($spool, json_encode($item));
1361                                 logger("Item wasn't stored - Item was spooled into file ".$file, LOGGER_DEBUG);
1362                         }
1363                         return 0;
1364                 }
1365
1366                 if ($current_post == 0) {
1367                         // This is one of these error messages that never should occur.
1368                         logger("couldn't find created item - we better quit now.");
1369                         dba::rollback();
1370                         return 0;
1371                 }
1372
1373                 // How much entries have we created?
1374                 // We wouldn't need this query when we could use an unique index - but MySQL has length problems with them.
1375                 $entries = dba::count('item', ['uri' => $item['uri'], 'uid' => $item['uid'], 'network' => $item['network']]);
1376
1377                 if ($entries > 1) {
1378                         // There are duplicates. We delete our just created entry.
1379                         logger('Duplicated post occurred. uri = ' . $item['uri'] . ' uid = ' . $item['uid']);
1380
1381                         // Yes, we could do a rollback here - but we are having many users with MyISAM.
1382                         dba::delete('item', ['id' => $current_post]);
1383                         dba::commit();
1384                         return 0;
1385                 } elseif ($entries == 0) {
1386                         // This really should never happen since we quit earlier if there were problems.
1387                         logger("Something is terribly wrong. We haven't found our created entry.");
1388                         dba::rollback();
1389                         return 0;
1390                 }
1391
1392                 logger('created item '.$current_post);
1393                 self::updateContact($item);
1394
1395                 if (!$parent_id || ($item['parent-uri'] === $item['uri'])) {
1396                         $parent_id = $current_post;
1397                 }
1398
1399                 // Set parent id
1400                 dba::update('item', ['parent' => $parent_id], ['id' => $current_post]);
1401
1402                 $item['id'] = $current_post;
1403                 $item['parent'] = $parent_id;
1404
1405                 // update the commented timestamp on the parent
1406                 // Only update "commented" if it is really a comment
1407                 if (($item['verb'] == ACTIVITY_POST) || !Config::get("system", "like_no_comment")) {
1408                         dba::update('item', ['commented' => DateTimeFormat::utcNow(), 'changed' => DateTimeFormat::utcNow()], ['id' => $parent_id]);
1409                 } else {
1410                         dba::update('item', ['changed' => DateTimeFormat::utcNow()], ['id' => $parent_id]);
1411                 }
1412
1413                 if ($dsprsig) {
1414                         /*
1415                          * Friendica servers lower than 3.4.3-2 had double encoded the signature ...
1416                          * We can check for this condition when we decode and encode the stuff again.
1417                          */
1418                         if (base64_encode(base64_decode(base64_decode($dsprsig->signature))) == base64_decode($dsprsig->signature)) {
1419                                 $dsprsig->signature = base64_decode($dsprsig->signature);
1420                                 logger("Repaired double encoded signature from handle ".$dsprsig->signer, LOGGER_DEBUG);
1421                         }
1422
1423                         dba::insert('sign', ['iid' => $current_post, 'signed_text' => $dsprsig->signed_text,
1424                                                 'signature' => $dsprsig->signature, 'signer' => $dsprsig->signer]);
1425                 }
1426
1427                 if (!empty($diaspora_signed_text)) {
1428                         // Formerly we stored the signed text, the signature and the author in different fields.
1429                         // We now store the raw data so that we are more flexible.
1430                         dba::insert('sign', ['iid' => $current_post, 'signed_text' => $diaspora_signed_text]);
1431                 }
1432
1433                 $deleted = self::tagDeliver($item['uid'], $current_post);
1434
1435                 /*
1436                  * current post can be deleted if is for a community page and no mention are
1437                  * in it.
1438                  */
1439                 if (!$deleted && !$dontcache) {
1440                         $posted_item = dba::selectFirst('item', [], ['id' => $current_post]);
1441                         if (DBM::is_result($posted_item)) {
1442                                 if ($notify) {
1443                                         Addon::callHooks('post_local_end', $posted_item);
1444                                 } else {
1445                                         Addon::callHooks('post_remote_end', $posted_item);
1446                                 }
1447                         } else {
1448                                 logger('new item not found in DB, id ' . $current_post);
1449                         }
1450                 }
1451
1452                 if ($item['parent-uri'] === $item['uri']) {
1453                         self::addThread($current_post);
1454                 } else {
1455                         self::updateThread($parent_id);
1456                 }
1457
1458                 dba::commit();
1459
1460                 /*
1461                  * Due to deadlock issues with the "term" table we are doing these steps after the commit.
1462                  * This is not perfect - but a workable solution until we found the reason for the problem.
1463                  */
1464                 Term::insertFromTagFieldByItemId($current_post);
1465                 Term::insertFromFileFieldByItemId($current_post);
1466
1467                 if ($item['parent-uri'] === $item['uri']) {
1468                         self::addShadow($current_post);
1469                 } else {
1470                         self::addShadowPost($current_post);
1471                 }
1472
1473                 check_user_notification($current_post);
1474
1475                 if ($notify) {
1476                         Worker::add(['priority' => $priority, 'dont_fork' => true], "Notifier", $notify_type, $current_post);
1477                 } elseif (!empty($parent) && $parent['origin']) {
1478                         Worker::add(['priority' => PRIORITY_HIGH, 'dont_fork' => true], "Notifier", "comment-import", $current_post);
1479                 }
1480
1481                 return $current_post;
1482         }
1483
1484         /**
1485          * @brief Insert a new item content entry
1486          *
1487          * @param array $item The item fields that are to be inserted
1488          */
1489         private static function insertContent(&$item)
1490         {
1491                 $fields = ['uri' => $item['uri'], 'plink' => $item['plink'],
1492                         'uri-plink-hash' => hash('sha1', $item['plink']).hash('sha1', $item['uri'])];
1493
1494                 unset($item['plink']);
1495
1496                 foreach (self::CONTENT_FIELDLIST as $field) {
1497                         if (isset($item[$field])) {
1498                                 $fields[$field] = $item[$field];
1499                                 unset($item[$field]);
1500                         }
1501                 }
1502
1503                 // Do we already have this content?
1504                 if (!dba::exists('item-content', ['uri' => $item['uri']])) {
1505                         dba::insert('item-content', $fields, true);
1506                 }
1507
1508                 $item_content = dba::selectFirst('item-content', ['id'], ['uri' => $item['uri']]);
1509                 if (DBM::is_result($item_content)) {
1510                         $item['icid'] = $item_content['id'];
1511                         logger('Insert content for URI ' . $item['uri'] . ' (' . $item['icid'] . ')');
1512                 }
1513         }
1514
1515         /**
1516          * @brief Update existing item content entries
1517          *
1518          * @param array $item The item fields that are to be changed
1519          * @param array $condition The condition for finding the item content entries
1520          */
1521         private static function updateContent($item, $condition)
1522         {
1523                 // We have to select only the fields from the "item-content" table
1524                 $fields = [];
1525                 foreach (self::CONTENT_FIELDLIST as $field) {
1526                         if (isset($item[$field])) {
1527                                 $fields[$field] = $item[$field];
1528                         }
1529                 }
1530
1531                 if (empty($fields)) {
1532                         return;
1533                 }
1534
1535                 if (!empty($item['plink'])) {
1536                         $fields['plink'] = $item['plink'];
1537                         $fields['uri-plink-hash'] = hash('sha1', $item['plink']) . hash('sha1', $condition['uri']);
1538                 }
1539
1540                 logger('Update content for URI ' . $condition['uri']);
1541
1542                 dba::update('item-content', $fields, $condition, true);
1543         }
1544
1545         /**
1546          * @brief Distributes public items to the receivers
1547          *
1548          * @param integer $itemid      Item ID that should be added
1549          * @param string  $signed_text Original text (for Diaspora signatures), JSON encoded.
1550          */
1551         public static function distribute($itemid, $signed_text = '')
1552         {
1553                 $condition = ["`id` IN (SELECT `parent` FROM `item` WHERE `id` = ?)", $itemid];
1554                 $parent = dba::selectFirst('item', ['owner-id'], $condition);
1555                 if (!DBM::is_result($parent)) {
1556                         return;
1557                 }
1558
1559                 // Only distribute public items from native networks
1560                 $condition = ['id' => $itemid, 'uid' => 0,
1561                         'network' => [NETWORK_DFRN, NETWORK_DIASPORA, NETWORK_OSTATUS, ""],
1562                         'visible' => true, 'deleted' => false, 'moderated' => false, 'private' => false];
1563                 $item = self::selectFirst(self::ITEM_FIELDLIST, ['id' => $itemid]);
1564                 if (!DBM::is_result($item)) {
1565                         return;
1566                 }
1567
1568                 unset($item['id']);
1569                 unset($item['parent']);
1570                 unset($item['mention']);
1571                 unset($item['wall']);
1572                 unset($item['origin']);
1573                 unset($item['starred']);
1574
1575                 $users = [];
1576
1577                 $condition = ["`nurl` IN (SELECT `nurl` FROM `contact` WHERE `id` = ?) AND `uid` != 0 AND NOT `blocked` AND `rel` IN (?, ?)",
1578                         $parent['owner-id'], CONTACT_IS_SHARING,  CONTACT_IS_FRIEND];
1579                 $contacts = dba::select('contact', ['uid'], $condition);
1580                 while ($contact = dba::fetch($contacts)) {
1581                         $users[$contact['uid']] = $contact['uid'];
1582                 }
1583
1584                 $origin_uid = 0;
1585
1586                 if ($item['uri'] != $item['parent-uri']) {
1587                         $parents = dba::select('item', ['uid', 'origin'], ["`uri` = ? AND `uid` != 0", $item['parent-uri']]);
1588                         while ($parent = dba::fetch($parents)) {
1589                                 $users[$parent['uid']] = $parent['uid'];
1590                                 if ($parent['origin'] && !$item['origin']) {
1591                                         $origin_uid = $parent['uid'];
1592                                 }
1593                         }
1594                 }
1595
1596                 foreach ($users as $uid) {
1597                         if ($origin_uid == $uid) {
1598                                 $item['diaspora_signed_text'] = $signed_text;
1599                         }
1600                         self::storeForUser($itemid, $item, $uid);
1601                 }
1602         }
1603
1604         /**
1605          * @brief Store public items for the receivers
1606          *
1607          * @param integer $itemid Item ID that should be added
1608          * @param array   $item   The item entry that will be stored
1609          * @param integer $uid    The user that will receive the item entry
1610          */
1611         private static function storeForUser($itemid, $item, $uid)
1612         {
1613                 $item['uid'] = $uid;
1614                 $item['origin'] = 0;
1615                 $item['wall'] = 0;
1616                 if ($item['uri'] == $item['parent-uri']) {
1617                         $item['contact-id'] = Contact::getIdForURL($item['owner-link'], $uid);
1618                 } else {
1619                         $item['contact-id'] = Contact::getIdForURL($item['author-link'], $uid);
1620                 }
1621
1622                 if (empty($item['contact-id'])) {
1623                         $self = dba::selectFirst('contact', ['id'], ['self' => true, 'uid' => $uid]);
1624                         if (!DBM::is_result($self)) {
1625                                 return;
1626                         }
1627                         $item['contact-id'] = $self['id'];
1628                 }
1629
1630                 if (in_array($item['type'], ["net-comment", "wall-comment"])) {
1631                         $item['type'] = 'remote-comment';
1632                 } elseif ($item['type'] == 'wall') {
1633                         $item['type'] = 'remote';
1634                 }
1635
1636                 /// @todo Handling of "event-id"
1637
1638                 $notify = false;
1639                 if ($item['uri'] == $item['parent-uri']) {
1640                         $contact = dba::selectFirst('contact', [], ['id' => $item['contact-id'], 'self' => false]);
1641                         if (DBM::is_result($contact)) {
1642                                 $notify = self::isRemoteSelf($contact, $item);
1643                         }
1644                 }
1645
1646                 $distributed = self::insert($item, false, $notify, true);
1647
1648                 if (!$distributed) {
1649                         logger("Distributed public item " . $itemid . " for user " . $uid . " wasn't stored", LOGGER_DEBUG);
1650                 } else {
1651                         logger("Distributed public item " . $itemid . " for user " . $uid . " with id " . $distributed, LOGGER_DEBUG);
1652                 }
1653         }
1654
1655         /**
1656          * @brief Add a shadow entry for a given item id that is a thread starter
1657          *
1658          * We store every public item entry additionally with the user id "0".
1659          * This is used for the community page and for the search.
1660          * It is planned that in the future we will store public item entries only once.
1661          *
1662          * @param integer $itemid Item ID that should be added
1663          */
1664         public static function addShadow($itemid)
1665         {
1666                 $fields = ['uid', 'private', 'moderated', 'visible', 'deleted', 'network'];
1667                 $condition = ['id' => $itemid, 'parent' => [0, $itemid]];
1668                 $item = dba::selectFirst('item', $fields, $condition);
1669
1670                 if (!DBM::is_result($item)) {
1671                         return;
1672                 }
1673
1674                 // is it already a copy?
1675                 if (($itemid == 0) || ($item['uid'] == 0)) {
1676                         return;
1677                 }
1678
1679                 // Is it a visible public post?
1680                 if (!$item["visible"] || $item["deleted"] || $item["moderated"] || $item["private"]) {
1681                         return;
1682                 }
1683
1684                 // is it an entry from a connector? Only add an entry for natively connected networks
1685                 if (!in_array($item["network"], [NETWORK_DFRN, NETWORK_DIASPORA, NETWORK_OSTATUS, ""])) {
1686                         return;
1687                 }
1688
1689                 $item = self::selectFirst(self::ITEM_FIELDLIST, ['id' => $itemid]);
1690
1691                 if (DBM::is_result($item) && ($item["allow_cid"] == '') && ($item["allow_gid"] == '') &&
1692                         ($item["deny_cid"] == '') && ($item["deny_gid"] == '')) {
1693
1694                         if (!self::exists(['uri' => $item['uri'], 'uid' => 0])) {
1695                                 // Preparing public shadow (removing user specific data)
1696                                 $item['uid'] = 0;
1697                                 unset($item['id']);
1698                                 unset($item['parent']);
1699                                 unset($item['wall']);
1700                                 unset($item['mention']);
1701                                 unset($item['origin']);
1702                                 unset($item['starred']);
1703                                 if ($item['uri'] == $item['parent-uri']) {
1704                                         $item['contact-id'] = $item['owner-id'];
1705                                 } else {
1706                                         $item['contact-id'] = $item['author-id'];
1707                                 }
1708
1709                                 if (in_array($item['type'], ["net-comment", "wall-comment"])) {
1710                                         $item['type'] = 'remote-comment';
1711                                 } elseif ($item['type'] == 'wall') {
1712                                         $item['type'] = 'remote';
1713                                 }
1714
1715                                 $public_shadow = self::insert($item, false, false, true);
1716
1717                                 logger("Stored public shadow for thread ".$itemid." under id ".$public_shadow, LOGGER_DEBUG);
1718                         }
1719                 }
1720         }
1721
1722         /**
1723          * @brief Add a shadow entry for a given item id that is a comment
1724          *
1725          * This function does the same like the function above - but for comments
1726          *
1727          * @param integer $itemid Item ID that should be added
1728          */
1729         public static function addShadowPost($itemid)
1730         {
1731                 $item = self::selectFirst(self::ITEM_FIELDLIST, ['id' => $itemid]);
1732                 if (!DBM::is_result($item)) {
1733                         return;
1734                 }
1735
1736                 // Is it a toplevel post?
1737                 if ($item['id'] == $item['parent']) {
1738                         self::addShadow($itemid);
1739                         return;
1740                 }
1741
1742                 // Is this a shadow entry?
1743                 if ($item['uid'] == 0) {
1744                         return;
1745                 }
1746
1747                 // Is there a shadow parent?
1748                 if (!self::exists(['uri' => $item['parent-uri'], 'uid' => 0])) {
1749                         return;
1750                 }
1751
1752                 // Is there already a shadow entry?
1753                 if (self::exists(['uri' => $item['uri'], 'uid' => 0])) {
1754                         return;
1755                 }
1756
1757                 // Save "origin" and "parent" state
1758                 $origin = $item['origin'];
1759                 $parent = $item['parent'];
1760
1761                 // Preparing public shadow (removing user specific data)
1762                 $item['uid'] = 0;
1763                 unset($item['id']);
1764                 unset($item['parent']);
1765                 unset($item['wall']);
1766                 unset($item['mention']);
1767                 unset($item['origin']);
1768                 unset($item['starred']);
1769                 $item['contact-id'] = Contact::getIdForURL($item['author-link']);
1770
1771                 if (in_array($item['type'], ["net-comment", "wall-comment"])) {
1772                         $item['type'] = 'remote-comment';
1773                 } elseif ($item['type'] == 'wall') {
1774                         $item['type'] = 'remote';
1775                 }
1776
1777                 $public_shadow = self::insert($item, false, false, true);
1778
1779                 logger("Stored public shadow for comment ".$item['uri']." under id ".$public_shadow, LOGGER_DEBUG);
1780
1781                 // If this was a comment to a Diaspora post we don't get our comment back.
1782                 // This means that we have to distribute the comment by ourselves.
1783                 if ($origin && self::exists(['id' => $parent, 'network' => NETWORK_DIASPORA])) {
1784                         self::distribute($public_shadow);
1785                 }
1786         }
1787
1788          /**
1789          * Adds a "lang" specification in a "postopts" element of given $arr,
1790          * if possible and not already present.
1791          * Expects "body" element to exist in $arr.
1792          */
1793         private static function addLanguageInPostopts(&$item)
1794         {
1795                 $postopts = "";
1796
1797                 if (!empty($item['postopts'])) {
1798                         if (strstr($item['postopts'], 'lang=')) {
1799                                 // do not override
1800                                 return;
1801                         }
1802                         $postopts = $item['postopts'];
1803                 }
1804
1805                 $naked_body = Text\BBCode::toPlaintext($item['body'], false);
1806
1807                 $languages = (new Text_LanguageDetect())->detect($naked_body, 3);
1808
1809                 if (sizeof($languages) > 0) {
1810                         if ($postopts != '') {
1811                                 $postopts .= '&'; // arbitrary separator, to be reviewed
1812                         }
1813
1814                         $postopts .= 'lang=';
1815                         $sep = "";
1816
1817                         foreach ($languages as $language => $score) {
1818                                 $postopts .= $sep . $language . ";" . $score;
1819                                 $sep = ':';
1820                         }
1821                         $item['postopts'] = $postopts;
1822                 }
1823         }
1824
1825         /**
1826          * @brief Creates an unique guid out of a given uri
1827          *
1828          * @param string $uri uri of an item entry
1829          * @param string $host hostname for the GUID prefix
1830          * @return string unique guid
1831          */
1832         public static function guidFromUri($uri, $host)
1833         {
1834                 // Our regular guid routine is using this kind of prefix as well
1835                 // We have to avoid that different routines could accidentally create the same value
1836                 $parsed = parse_url($uri);
1837
1838                 // We use a hash of the hostname as prefix for the guid
1839                 $guid_prefix = hash("crc32", $host);
1840
1841                 // Remove the scheme to make sure that "https" and "http" doesn't make a difference
1842                 unset($parsed["scheme"]);
1843
1844                 // Glue it together to be able to make a hash from it
1845                 $host_id = implode("/", $parsed);
1846
1847                 // We could use any hash algorithm since it isn't a security issue
1848                 $host_hash = hash("ripemd128", $host_id);
1849
1850                 return $guid_prefix.$host_hash;
1851         }
1852
1853         /**
1854          * generate an unique URI
1855          *
1856          * @param integer $uid User id
1857          * @param string $guid An existing GUID (Otherwise it will be generated)
1858          *
1859          * @return string
1860          */
1861         public static function newURI($uid, $guid = "")
1862         {
1863                 if ($guid == "") {
1864                         $guid = get_guid(32);
1865                 }
1866
1867                 $hostname = self::getApp()->get_hostname();
1868
1869                 $user = dba::selectFirst('user', ['nickname'], ['uid' => $uid]);
1870
1871                 $uri = "urn:X-dfrn:" . $hostname . ':' . $user['nickname'] . ':' . $guid;
1872
1873                 return $uri;
1874         }
1875
1876         /**
1877          * @brief Set "success_update" and "last-item" to the date of the last time we heard from this contact
1878          *
1879          * This can be used to filter for inactive contacts.
1880          * Only do this for public postings to avoid privacy problems, since poco data is public.
1881          * Don't set this value if it isn't from the owner (could be an author that we don't know)
1882          *
1883          * @param array $arr Contains the just posted item record
1884          */
1885         private static function updateContact($arr)
1886         {
1887                 // Unarchive the author
1888                 $contact = dba::selectFirst('contact', [], ['id' => $arr["author-id"]]);
1889                 if (DBM::is_result($contact)) {
1890                         Contact::unmarkForArchival($contact);
1891                 }
1892
1893                 // Unarchive the contact if it's not our own contact
1894                 $contact = dba::selectFirst('contact', [], ['id' => $arr["contact-id"], 'self' => false]);
1895                 if (DBM::is_result($contact)) {
1896                         Contact::unmarkForArchival($contact);
1897                 }
1898
1899                 $update = (!$arr['private'] && (($arr["author-link"] === $arr["owner-link"]) || ($arr["parent-uri"] === $arr["uri"])));
1900
1901                 // Is it a forum? Then we don't care about the rules from above
1902                 if (!$update && ($arr["network"] == NETWORK_DFRN) && ($arr["parent-uri"] === $arr["uri"])) {
1903                         if (dba::exists('contact', ['id' => $arr['contact-id'], 'forum' => true])) {
1904                                 $update = true;
1905                         }
1906                 }
1907
1908                 if ($update) {
1909                         dba::update('contact', ['success_update' => $arr['received'], 'last-item' => $arr['received']],
1910                                 ['id' => $arr['contact-id']]);
1911                 }
1912                 // Now do the same for the system wide contacts with uid=0
1913                 if (!$arr['private']) {
1914                         dba::update('contact', ['success_update' => $arr['received'], 'last-item' => $arr['received']],
1915                                 ['id' => $arr['owner-id']]);
1916
1917                         if ($arr['owner-id'] != $arr['author-id']) {
1918                                 dba::update('contact', ['success_update' => $arr['received'], 'last-item' => $arr['received']],
1919                                         ['id' => $arr['author-id']]);
1920                         }
1921                 }
1922         }
1923
1924         public static function setHashtags(&$item)
1925         {
1926
1927                 $tags = get_tags($item["body"]);
1928
1929                 // No hashtags?
1930                 if (!count($tags)) {
1931                         return false;
1932                 }
1933
1934                 // This sorting is important when there are hashtags that are part of other hashtags
1935                 // Otherwise there could be problems with hashtags like #test and #test2
1936                 rsort($tags);
1937
1938                 $URLSearchString = "^\[\]";
1939
1940                 // All hashtags should point to the home server if "local_tags" is activated
1941                 if (Config::get('system', 'local_tags')) {
1942                         $item["body"] = preg_replace("/#\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",
1943                                         "#[url=".System::baseUrl()."/search?tag=$2]$2[/url]", $item["body"]);
1944
1945                         $item["tag"] = preg_replace("/#\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",
1946                                         "#[url=".System::baseUrl()."/search?tag=$2]$2[/url]", $item["tag"]);
1947                 }
1948
1949                 // mask hashtags inside of url, bookmarks and attachments to avoid urls in urls
1950                 $item["body"] = preg_replace_callback("/\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",
1951                         function ($match) {
1952                                 return ("[url=" . str_replace("#", "&num;", $match[1]) . "]" . str_replace("#", "&num;", $match[2]) . "[/url]");
1953                         }, $item["body"]);
1954
1955                 $item["body"] = preg_replace_callback("/\[bookmark\=([$URLSearchString]*)\](.*?)\[\/bookmark\]/ism",
1956                         function ($match) {
1957                                 return ("[bookmark=" . str_replace("#", "&num;", $match[1]) . "]" . str_replace("#", "&num;", $match[2]) . "[/bookmark]");
1958                         }, $item["body"]);
1959
1960                 $item["body"] = preg_replace_callback("/\[attachment (.*)\](.*?)\[\/attachment\]/ism",
1961                         function ($match) {
1962                                 return ("[attachment " . str_replace("#", "&num;", $match[1]) . "]" . $match[2] . "[/attachment]");
1963                         }, $item["body"]);
1964
1965                 // Repair recursive urls
1966                 $item["body"] = preg_replace("/&num;\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",
1967                                 "&num;$2", $item["body"]);
1968
1969                 foreach ($tags as $tag) {
1970                         if ((strpos($tag, '#') !== 0) || strpos($tag, '[url=')) {
1971                                 continue;
1972                         }
1973
1974                         $basetag = str_replace('_',' ',substr($tag,1));
1975
1976                         $newtag = '#[url=' . System::baseUrl() . '/search?tag=' . rawurlencode($basetag) . ']' . $basetag . '[/url]';
1977
1978                         $item["body"] = str_replace($tag, $newtag, $item["body"]);
1979
1980                         if (!stristr($item["tag"], "/search?tag=" . $basetag . "]" . $basetag . "[/url]")) {
1981                                 if (strlen($item["tag"])) {
1982                                         $item["tag"] = ','.$item["tag"];
1983                                 }
1984                                 $item["tag"] = $newtag.$item["tag"];
1985                         }
1986                 }
1987
1988                 // Convert back the masked hashtags
1989                 $item["body"] = str_replace("&num;", "#", $item["body"]);
1990         }
1991
1992         public static function getGuidById($id)
1993         {
1994                 $item = dba::selectFirst('item', ['guid'], ['id' => $id]);
1995                 if (DBM::is_result($item)) {
1996                         return $item['guid'];
1997                 } else {
1998                         return '';
1999                 }
2000         }
2001
2002         public static function getIdAndNickByGuid($guid, $uid = 0)
2003         {
2004                 $nick = "";
2005                 $id = 0;
2006
2007                 if ($uid == 0) {
2008                         $uid == local_user();
2009                 }
2010
2011                 // Does the given user have this item?
2012                 if ($uid) {
2013                         $item = dba::fetch_first("SELECT `item`.`id`, `user`.`nickname` FROM `item`
2014                                 INNER JOIN `user` ON `user`.`uid` = `item`.`uid`
2015                                 WHERE `item`.`visible` AND NOT `item`.`deleted` AND NOT `item`.`moderated`
2016                                         AND `item`.`guid` = ? AND `item`.`uid` = ?", $guid, $uid);
2017                         if (DBM::is_result($item)) {
2018                                 $id = $item["id"];
2019                                 $nick = $item["nickname"];
2020                         }
2021                 }
2022
2023                 // Or is it anywhere on the server?
2024                 if ($nick == "") {
2025                         $item = dba::fetch_first("SELECT `item`.`id`, `user`.`nickname` FROM `item`
2026                                 INNER JOIN `user` ON `user`.`uid` = `item`.`uid`
2027                                 WHERE `item`.`visible` AND NOT `item`.`deleted` AND NOT `item`.`moderated`
2028                                         AND `item`.`allow_cid` = ''  AND `item`.`allow_gid` = ''
2029                                         AND `item`.`deny_cid`  = '' AND `item`.`deny_gid`  = ''
2030                                         AND NOT `item`.`private` AND `item`.`wall`
2031                                         AND `item`.`guid` = ?", $guid);
2032                         if (DBM::is_result($item)) {
2033                                 $id = $item["id"];
2034                                 $nick = $item["nickname"];
2035                         }
2036                 }
2037                 return ["nick" => $nick, "id" => $id];
2038         }
2039
2040         /**
2041          * look for mention tags and setup a second delivery chain for forum/community posts if appropriate
2042          * @param int $uid
2043          * @param int $item_id
2044          * @return bool true if item was deleted, else false
2045          */
2046         private static function tagDeliver($uid, $item_id)
2047         {
2048                 $mention = false;
2049
2050                 $user = dba::selectFirst('user', [], ['uid' => $uid]);
2051                 if (!DBM::is_result($user)) {
2052                         return;
2053                 }
2054
2055                 $community_page = (($user['page-flags'] == PAGE_COMMUNITY) ? true : false);
2056                 $prvgroup = (($user['page-flags'] == PAGE_PRVGROUP) ? true : false);
2057
2058                 $item = dba::selectFirst('item', [], ['id' => $item_id]);
2059                 if (!DBM::is_result($item)) {
2060                         return;
2061                 }
2062
2063                 $link = normalise_link(System::baseUrl() . '/profile/' . $user['nickname']);
2064
2065                 /*
2066                  * Diaspora uses their own hardwired link URL in @-tags
2067                  * instead of the one we supply with webfinger
2068                  */
2069                 $dlink = normalise_link(System::baseUrl() . '/u/' . $user['nickname']);
2070
2071                 $cnt = preg_match_all('/[\@\!]\[url\=(.*?)\](.*?)\[\/url\]/ism', $item['body'], $matches, PREG_SET_ORDER);
2072                 if ($cnt) {
2073                         foreach ($matches as $mtch) {
2074                                 if (link_compare($link, $mtch[1]) || link_compare($dlink, $mtch[1])) {
2075                                         $mention = true;
2076                                         logger('mention found: ' . $mtch[2]);
2077                                 }
2078                         }
2079                 }
2080
2081                 if (!$mention) {
2082                         if (($community_page || $prvgroup) &&
2083                                   !$item['wall'] && !$item['origin'] && ($item['id'] == $item['parent'])) {
2084                                 // mmh.. no mention.. community page or private group... no wall.. no origin.. top-post (not a comment)
2085                                 // delete it!
2086                                 logger("no-mention top-level post to community or private group. delete.");
2087                                 dba::delete('item', ['id' => $item_id]);
2088                                 return true;
2089                         }
2090                         return;
2091                 }
2092
2093                 $arr = ['item' => $item, 'user' => $user];
2094
2095                 Addon::callHooks('tagged', $arr);
2096
2097                 if (!$community_page && !$prvgroup) {
2098                         return;
2099                 }
2100
2101                 /*
2102                  * tgroup delivery - setup a second delivery chain
2103                  * prevent delivery looping - only proceed
2104                  * if the message originated elsewhere and is a top-level post
2105                  */
2106                 if ($item['wall'] || $item['origin'] || ($item['id'] != $item['parent'])) {
2107                         return;
2108                 }
2109
2110                 // now change this copy of the post to a forum head message and deliver to all the tgroup members
2111                 $self = dba::selectFirst('contact', ['id', 'name', 'url', 'thumb'], ['uid' => $uid, 'self' => true]);
2112                 if (!DBM::is_result($self)) {
2113                         return;
2114                 }
2115
2116                 $owner_id = Contact::getIdForURL($self['url']);
2117
2118                 // also reset all the privacy bits to the forum default permissions
2119
2120                 $private = ($user['allow_cid'] || $user['allow_gid'] || $user['deny_cid'] || $user['deny_gid']) ? 1 : 0;
2121
2122                 $forum_mode = ($prvgroup ? 2 : 1);
2123
2124                 $fields = ['wall' => true, 'origin' => true, 'forum_mode' => $forum_mode, 'contact-id' => $self['id'],
2125                         'owner-id' => $owner_id, 'owner-link' => $self['url'], 'private' => $private, 'allow_cid' => $user['allow_cid'],
2126                         'allow_gid' => $user['allow_gid'], 'deny_cid' => $user['deny_cid'], 'deny_gid' => $user['deny_gid']];
2127                 dba::update('item', $fields, ['id' => $item_id]);
2128
2129                 self::updateThread($item_id);
2130
2131                 Worker::add(['priority' => PRIORITY_HIGH, 'dont_fork' => true], 'Notifier', 'tgroup', $item_id);
2132         }
2133
2134         public static function isRemoteSelf($contact, &$datarray)
2135         {
2136                 $a = get_app();
2137
2138                 if (!$contact['remote_self']) {
2139                         return false;
2140                 }
2141
2142                 // Prevent the forwarding of posts that are forwarded
2143                 if ($datarray["extid"] == NETWORK_DFRN) {
2144                         logger('Already forwarded', LOGGER_DEBUG);
2145                         return false;
2146                 }
2147
2148                 // Prevent to forward already forwarded posts
2149                 if ($datarray["app"] == $a->get_hostname()) {
2150                         logger('Already forwarded (second test)', LOGGER_DEBUG);
2151                         return false;
2152                 }
2153
2154                 // Only forward posts
2155                 if ($datarray["verb"] != ACTIVITY_POST) {
2156                         logger('No post', LOGGER_DEBUG);
2157                         return false;
2158                 }
2159
2160                 if (($contact['network'] != NETWORK_FEED) && $datarray['private']) {
2161                         logger('Not public', LOGGER_DEBUG);
2162                         return false;
2163                 }
2164
2165                 $datarray2 = $datarray;
2166                 logger('remote-self start - Contact '.$contact['url'].' - '.$contact['remote_self'].' Item '.print_r($datarray, true), LOGGER_DEBUG);
2167                 if ($contact['remote_self'] == 2) {
2168                         $self = dba::selectFirst('contact', ['id', 'name', 'url', 'thumb'],
2169                                         ['uid' => $contact['uid'], 'self' => true]);
2170                         if (DBM::is_result($self)) {
2171                                 $datarray['contact-id'] = $self["id"];
2172
2173                                 $datarray['owner-name'] = $self["name"];
2174                                 $datarray['owner-link'] = $self["url"];
2175                                 $datarray['owner-avatar'] = $self["thumb"];
2176
2177                                 $datarray['author-name']   = $datarray['owner-name'];
2178                                 $datarray['author-link']   = $datarray['owner-link'];
2179                                 $datarray['author-avatar'] = $datarray['owner-avatar'];
2180
2181                                 unset($datarray['created']);
2182                                 unset($datarray['edited']);
2183
2184                                 unset($datarray['network']);
2185                                 unset($datarray['owner-id']);
2186                                 unset($datarray['author-id']);
2187                         }
2188
2189                         if ($contact['network'] != NETWORK_FEED) {
2190                                 $datarray["guid"] = get_guid(32);
2191                                 unset($datarray["plink"]);
2192                                 $datarray["uri"] = self::newURI($contact['uid'], $datarray["guid"]);
2193                                 $datarray["parent-uri"] = $datarray["uri"];
2194                                 $datarray["thr-parent"] = $datarray["uri"];
2195                                 $datarray["extid"] = NETWORK_DFRN;
2196                                 $urlpart = parse_url($datarray2['author-link']);
2197                                 $datarray["app"] = $urlpart["host"];
2198                         } else {
2199                                 $datarray['private'] = 0;
2200                         }
2201                 }
2202
2203                 if ($contact['network'] != NETWORK_FEED) {
2204                         // Store the original post
2205                         $result = self::insert($datarray2, false, false);
2206                         logger('remote-self post original item - Contact '.$contact['url'].' return '.$result.' Item '.print_r($datarray2, true), LOGGER_DEBUG);
2207                 } else {
2208                         $datarray["app"] = "Feed";
2209                         $result = true;
2210                 }
2211
2212                 // Trigger automatic reactions for addons
2213                 $datarray['api_source'] = true;
2214
2215                 // We have to tell the hooks who we are - this really should be improved
2216                 $_SESSION["authenticated"] = true;
2217                 $_SESSION["uid"] = $contact['uid'];
2218
2219                 return $result;
2220         }
2221
2222         /**
2223          *
2224          * @param string $s
2225          * @param int    $uid
2226          * @param array  $item
2227          * @param int    $cid
2228          * @return string
2229          */
2230         public static function fixPrivatePhotos($s, $uid, $item = null, $cid = 0)
2231         {
2232                 if (Config::get('system', 'disable_embedded')) {
2233                         return $s;
2234                 }
2235
2236                 logger('check for photos', LOGGER_DEBUG);
2237                 $site = substr(System::baseUrl(), strpos(System::baseUrl(), '://'));
2238
2239                 $orig_body = $s;
2240                 $new_body = '';
2241
2242                 $img_start = strpos($orig_body, '[img');
2243                 $img_st_close = ($img_start !== false ? strpos(substr($orig_body, $img_start), ']') : false);
2244                 $img_len = ($img_start !== false ? strpos(substr($orig_body, $img_start + $img_st_close + 1), '[/img]') : false);
2245
2246                 while (($img_st_close !== false) && ($img_len !== false)) {
2247                         $img_st_close++; // make it point to AFTER the closing bracket
2248                         $image = substr($orig_body, $img_start + $img_st_close, $img_len);
2249
2250                         logger('found photo ' . $image, LOGGER_DEBUG);
2251
2252                         if (stristr($image, $site . '/photo/')) {
2253                                 // Only embed locally hosted photos
2254                                 $replace = false;
2255                                 $i = basename($image);
2256                                 $i = str_replace(['.jpg', '.png', '.gif'], ['', '', ''], $i);
2257                                 $x = strpos($i, '-');
2258
2259                                 if ($x) {
2260                                         $res = substr($i, $x + 1);
2261                                         $i = substr($i, 0, $x);
2262                                         $fields = ['data', 'type', 'allow_cid', 'allow_gid', 'deny_cid', 'deny_gid'];
2263                                         $photo = dba::selectFirst('photo', $fields, ['resource-id' => $i, 'scale' => $res, 'uid' => $uid]);
2264                                         if (DBM::is_result($photo)) {
2265                                                 /*
2266                                                  * Check to see if we should replace this photo link with an embedded image
2267                                                  * 1. No need to do so if the photo is public
2268                                                  * 2. If there's a contact-id provided, see if they're in the access list
2269                                                  *    for the photo. If so, embed it.
2270                                                  * 3. Otherwise, if we have an item, see if the item permissions match the photo
2271                                                  *    permissions, regardless of order but first check to see if they're an exact
2272                                                  *    match to save some processing overhead.
2273                                                  */
2274                                                 if (self::hasPermissions($photo)) {
2275                                                         if ($cid) {
2276                                                                 $recips = self::enumeratePermissions($photo);
2277                                                                 if (in_array($cid, $recips)) {
2278                                                                         $replace = true;
2279                                                                 }
2280                                                         } elseif ($item) {
2281                                                                 if (self::samePermissions($item, $photo)) {
2282                                                                         $replace = true;
2283                                                                 }
2284                                                         }
2285                                                 }
2286                                                 if ($replace) {
2287                                                         $data = $photo['data'];
2288                                                         $type = $photo['type'];
2289
2290                                                         // If a custom width and height were specified, apply before embedding
2291                                                         if (preg_match("/\[img\=([0-9]*)x([0-9]*)\]/is", substr($orig_body, $img_start, $img_st_close), $match)) {
2292                                                                 logger('scaling photo', LOGGER_DEBUG);
2293
2294                                                                 $width = intval($match[1]);
2295                                                                 $height = intval($match[2]);
2296
2297                                                                 $Image = new Image($data, $type);
2298                                                                 if ($Image->isValid()) {
2299                                                                         $Image->scaleDown(max($width, $height));
2300                                                                         $data = $Image->asString();
2301                                                                         $type = $Image->getType();
2302                                                                 }
2303                                                         }
2304
2305                                                         logger('replacing photo', LOGGER_DEBUG);
2306                                                         $image = 'data:' . $type . ';base64,' . base64_encode($data);
2307                                                         logger('replaced: ' . $image, LOGGER_DATA);
2308                                                 }
2309                                         }
2310                                 }
2311                         }
2312
2313                         $new_body = $new_body . substr($orig_body, 0, $img_start + $img_st_close) . $image . '[/img]';
2314                         $orig_body = substr($orig_body, $img_start + $img_st_close + $img_len + strlen('[/img]'));
2315                         if ($orig_body === false) {
2316                                 $orig_body = '';
2317                         }
2318
2319                         $img_start = strpos($orig_body, '[img');
2320                         $img_st_close = ($img_start !== false ? strpos(substr($orig_body, $img_start), ']') : false);
2321                         $img_len = ($img_start !== false ? strpos(substr($orig_body, $img_start + $img_st_close + 1), '[/img]') : false);
2322                 }
2323
2324                 $new_body = $new_body . $orig_body;
2325
2326                 return $new_body;
2327         }
2328
2329         private static function hasPermissions($obj)
2330         {
2331                 return (
2332                         (
2333                                 x($obj, 'allow_cid')
2334                         ) || (
2335                                 x($obj, 'allow_gid')
2336                         ) || (
2337                                 x($obj, 'deny_cid')
2338                         ) || (
2339                                 x($obj, 'deny_gid')
2340                         )
2341                 );
2342         }
2343
2344         private static function samePermissions($obj1, $obj2)
2345         {
2346                 // first part is easy. Check that these are exactly the same.
2347                 if (($obj1['allow_cid'] == $obj2['allow_cid'])
2348                         && ($obj1['allow_gid'] == $obj2['allow_gid'])
2349                         && ($obj1['deny_cid'] == $obj2['deny_cid'])
2350                         && ($obj1['deny_gid'] == $obj2['deny_gid'])) {
2351                         return true;
2352                 }
2353
2354                 // This is harder. Parse all the permissions and compare the resulting set.
2355                 $recipients1 = self::enumeratePermissions($obj1);
2356                 $recipients2 = self::enumeratePermissions($obj2);
2357                 sort($recipients1);
2358                 sort($recipients2);
2359
2360                 /// @TODO Comparison of arrays, maybe use array_diff_assoc() here?
2361                 return ($recipients1 == $recipients2);
2362         }
2363
2364         // returns an array of contact-ids that are allowed to see this object
2365         private static function enumeratePermissions($obj)
2366         {
2367                 $allow_people = expand_acl($obj['allow_cid']);
2368                 $allow_groups = Group::expand(expand_acl($obj['allow_gid']));
2369                 $deny_people  = expand_acl($obj['deny_cid']);
2370                 $deny_groups  = Group::expand(expand_acl($obj['deny_gid']));
2371                 $recipients   = array_unique(array_merge($allow_people, $allow_groups));
2372                 $deny         = array_unique(array_merge($deny_people, $deny_groups));
2373                 $recipients   = array_diff($recipients, $deny);
2374                 return $recipients;
2375         }
2376
2377         public static function getFeedTags($item)
2378         {
2379                 $ret = [];
2380                 $matches = false;
2381                 $cnt = preg_match_all('|\#\[url\=(.*?)\](.*?)\[\/url\]|', $item['tag'], $matches);
2382                 if ($cnt) {
2383                         for ($x = 0; $x < $cnt; $x ++) {
2384                                 if ($matches[1][$x]) {
2385                                         $ret[$matches[2][$x]] = ['#', $matches[1][$x], $matches[2][$x]];
2386                                 }
2387                         }
2388                 }
2389                 $matches = false;
2390                 $cnt = preg_match_all('|\@\[url\=(.*?)\](.*?)\[\/url\]|', $item['tag'], $matches);
2391                 if ($cnt) {
2392                         for ($x = 0; $x < $cnt; $x ++) {
2393                                 if ($matches[1][$x]) {
2394                                         $ret[] = ['@', $matches[1][$x], $matches[2][$x]];
2395                                 }
2396                         }
2397                 }
2398                 return $ret;
2399         }
2400
2401         public static function expire($uid, $days, $network = "", $force = false)
2402         {
2403                 if (!$uid || ($days < 1)) {
2404                         return;
2405                 }
2406
2407                 /*
2408                  * $expire_network_only = save your own wall posts
2409                  * and just expire conversations started by others
2410                  */
2411                 $expire_network_only = PConfig::get($uid,'expire', 'network_only');
2412                 $sql_extra = (intval($expire_network_only) ? " AND wall = 0 " : "");
2413
2414                 if ($network != "") {
2415                         $sql_extra .= sprintf(" AND network = '%s' ", dbesc($network));
2416
2417                         /*
2418                          * There is an index "uid_network_received" but not "uid_network_created"
2419                          * This avoids the creation of another index just for one purpose.
2420                          * And it doesn't really matter wether to look at "received" or "created"
2421                          */
2422                         $range = "AND `received` < UTC_TIMESTAMP() - INTERVAL %d DAY ";
2423                 } else {
2424                         $range = "AND `created` < UTC_TIMESTAMP() - INTERVAL %d DAY ";
2425                 }
2426
2427                 $r = q("SELECT `file`, `resource-id`, `starred`, `type`, `id` FROM `item`
2428                         WHERE `uid` = %d $range
2429                         AND `id` = `parent`
2430                         $sql_extra
2431                         AND `deleted` = 0",
2432                         intval($uid),
2433                         intval($days)
2434                 );
2435
2436                 if (!DBM::is_result($r)) {
2437                         return;
2438                 }
2439
2440                 $expire_items = PConfig::get($uid, 'expire', 'items', 1);
2441
2442                 // Forcing expiring of items - but not notes and marked items
2443                 if ($force) {
2444                         $expire_items = true;
2445                 }
2446
2447                 $expire_notes = PConfig::get($uid, 'expire', 'notes', 1);
2448                 $expire_starred = PConfig::get($uid, 'expire', 'starred', 1);
2449                 $expire_photos = PConfig::get($uid, 'expire', 'photos', 0);
2450
2451                 logger('User '.$uid.': expire: # items=' . count($r). "; expire items: $expire_items, expire notes: $expire_notes, expire starred: $expire_starred, expire photos: $expire_photos");
2452
2453                 foreach ($r as $item) {
2454
2455                         // don't expire filed items
2456
2457                         if (strpos($item['file'],'[') !== false) {
2458                                 continue;
2459                         }
2460
2461                         // Only expire posts, not photos and photo comments
2462
2463                         if ($expire_photos == 0 && strlen($item['resource-id'])) {
2464                                 continue;
2465                         } elseif ($expire_starred == 0 && intval($item['starred'])) {
2466                                 continue;
2467                         } elseif ($expire_notes == 0 && $item['type'] == 'note') {
2468                                 continue;
2469                         } elseif ($expire_items == 0 && $item['type'] != 'note') {
2470                                 continue;
2471                         }
2472
2473                         self::deleteById($item['id'], PRIORITY_LOW);
2474                 }
2475         }
2476
2477         public static function firstPostDate($uid, $wall = false)
2478         {
2479                 $condition = ['uid' => $uid, 'wall' => $wall, 'deleted' => false, 'visible' => true, 'moderated' => false];
2480                 $params = ['order' => ['created' => false]];
2481                 $thread = dba::selectFirst('thread', ['created'], $condition, $params);
2482                 if (DBM::is_result($thread)) {
2483                         return substr(DateTimeFormat::local($thread['created']), 0, 10);
2484                 }
2485                 return false;
2486         }
2487
2488         /**
2489          * @brief add/remove activity to an item
2490          *
2491          * Toggle activities as like,dislike,attend of an item
2492          *
2493          * @param string $item_id
2494          * @param string $verb
2495          *              Activity verb. One of
2496          *                      like, unlike, dislike, undislike, attendyes, unattendyes,
2497          *                      attendno, unattendno, attendmaybe, unattendmaybe
2498          * @hook 'post_local_end'
2499          *              array $arr
2500          *                      'post_id' => ID of posted item
2501          */
2502         public static function performLike($item_id, $verb)
2503         {
2504                 if (!local_user() && !remote_user()) {
2505                         return false;
2506                 }
2507
2508                 switch ($verb) {
2509                         case 'like':
2510                         case 'unlike':
2511                                 $bodyverb = L10n::t('%1$s likes %2$s\'s %3$s');
2512                                 $activity = ACTIVITY_LIKE;
2513                                 break;
2514                         case 'dislike':
2515                         case 'undislike':
2516                                 $bodyverb = L10n::t('%1$s doesn\'t like %2$s\'s %3$s');
2517                                 $activity = ACTIVITY_DISLIKE;
2518                                 break;
2519                         case 'attendyes':
2520                         case 'unattendyes':
2521                                 $bodyverb = L10n::t('%1$s is attending %2$s\'s %3$s');
2522                                 $activity = ACTIVITY_ATTEND;
2523                                 break;
2524                         case 'attendno':
2525                         case 'unattendno':
2526                                 $bodyverb = L10n::t('%1$s is not attending %2$s\'s %3$s');
2527                                 $activity = ACTIVITY_ATTENDNO;
2528                                 break;
2529                         case 'attendmaybe':
2530                         case 'unattendmaybe':
2531                                 $bodyverb = L10n::t('%1$s may attend %2$s\'s %3$s');
2532                                 $activity = ACTIVITY_ATTENDMAYBE;
2533                                 break;
2534                         default:
2535                                 logger('like: unknown verb ' . $verb . ' for item ' . $item_id);
2536                                 return false;
2537                 }
2538
2539                 // Enable activity toggling instead of on/off
2540                 $event_verb_flag = $activity === ACTIVITY_ATTEND || $activity === ACTIVITY_ATTENDNO || $activity === ACTIVITY_ATTENDMAYBE;
2541
2542                 logger('like: verb ' . $verb . ' item ' . $item_id);
2543
2544                 $item = dba::selectFirst('item', [], ['`id` = ? OR `uri` = ?', $item_id, $item_id]);
2545                 if (!DBM::is_result($item)) {
2546                         logger('like: unknown item ' . $item_id);
2547                         return false;
2548                 }
2549
2550                 $uid = $item['uid'];
2551                 if (($uid == 0) && local_user()) {
2552                         $uid = local_user();
2553                 }
2554
2555                 if (!can_write_wall($uid)) {
2556                         logger('like: unable to write on wall ' . $uid);
2557                         return false;
2558                 }
2559
2560                 // Retrieves the local post owner
2561                 $owner_self_contact = dba::selectFirst('contact', [], ['uid' => $uid, 'self' => true]);
2562                 if (!DBM::is_result($owner_self_contact)) {
2563                         logger('like: unknown owner ' . $uid);
2564                         return false;
2565                 }
2566
2567                 // Retrieve the current logged in user's public contact
2568                 $author_id = public_contact();
2569
2570                 $author_contact = dba::selectFirst('contact', [], ['id' => $author_id]);
2571                 if (!DBM::is_result($author_contact)) {
2572                         logger('like: unknown author ' . $author_id);
2573                         return false;
2574                 }
2575
2576                 // Contact-id is the uid-dependant author contact
2577                 if (local_user() == $uid) {
2578                         $item_contact_id = $owner_self_contact['id'];
2579                         $item_contact = $owner_self_contact;
2580                 } else {
2581                         $item_contact_id = Contact::getIdForURL($author_contact['url'], $uid, true);
2582                         $item_contact = dba::selectFirst('contact', [], ['id' => $item_contact_id]);
2583                         if (!DBM::is_result($item_contact)) {
2584                                 logger('like: unknown item contact ' . $item_contact_id);
2585                                 return false;
2586                         }
2587                 }
2588
2589                 // Look for an existing verb row
2590                 // event participation are essentially radio toggles. If you make a subsequent choice,
2591                 // we need to eradicate your first choice.
2592                 if ($event_verb_flag) {
2593                         $verbs = [ACTIVITY_ATTEND, ACTIVITY_ATTENDNO, ACTIVITY_ATTENDMAYBE];
2594                 } else {
2595                         $verbs = $activity;
2596                 }
2597
2598                 $base_condition = ['verb' => $verbs, 'deleted' => false, 'gravity' => GRAVITY_ACTIVITY,
2599                         'author-id' => $author_contact['id'], 'uid' => item['uid']];
2600
2601                 $condition = array_merge($base_condition, ['parent' => $item_id]);
2602                 $like_item = self::selectFirst(['id', 'guid', 'verb'], $condition);
2603
2604                 if (!DBM::is_result($like_item)) {
2605                         $condition = array_merge($base_condition, ['parent-uri' => $item_id]);
2606                         $like_item = self::selectFirst(['id', 'guid', 'verb'], $condition);
2607                 }
2608
2609                 if (!DBM::is_result($like_item)) {
2610                         $condition = array_merge($base_condition, ['thr-parent' => $item_id]);
2611                         $like_item = self::selectFirst(['id', 'guid', 'verb'], $condition);
2612                 }
2613
2614                 // If it exists, mark it as deleted
2615                 if (DBM::is_result($like_item)) {
2616                         // Already voted, undo it
2617                         $fields = ['deleted' => true, 'unseen' => true, 'changed' => DateTimeFormat::utcNow()];
2618                         /// @todo Consider using self::update - but before doing so, check the side effects
2619                         dba::update('item', $fields, ['id' => $like_item['id']]);
2620
2621                         // Clean up the Diaspora signatures for this like
2622                         // Go ahead and do it even if Diaspora support is disabled. We still want to clean up
2623                         // if it had been enabled in the past
2624                         dba::delete('sign', ['iid' => $like_item['id']]);
2625
2626                         $like_item_id = $like_item['id'];
2627                         Worker::add(PRIORITY_HIGH, "Notifier", "like", $like_item_id);
2628
2629                         if (!$event_verb_flag || $like_item['verb'] == $activity) {
2630                                 return true;
2631                         }
2632                 }
2633
2634                 // Verb is "un-something", just trying to delete existing entries
2635                 if (strpos($verb, 'un') === 0) {
2636                         return true;
2637                 }
2638
2639                 // Else or if event verb different from existing row, create a new item row
2640                 $post_type = (($item['resource-id']) ? L10n::t('photo') : L10n::t('status'));
2641                 if ($item['object-type'] === ACTIVITY_OBJ_EVENT) {
2642                         $post_type = L10n::t('event');
2643                 }
2644                 $objtype = $item['resource-id'] ? ACTIVITY_OBJ_IMAGE : ACTIVITY_OBJ_NOTE ;
2645                 $link = xmlify('<link rel="alternate" type="text/html" href="' . System::baseUrl() . '/display/' . $owner_self_contact['nick'] . '/' . $item['id'] . '" />' . "\n") ;
2646                 $body = $item['body'];
2647
2648                 $obj = <<< EOT
2649
2650                 <object>
2651                         <type>$objtype</type>
2652                         <local>1</local>
2653                         <id>{$item['uri']}</id>
2654                         <link>$link</link>
2655                         <title></title>
2656                         <content>$body</content>
2657                 </object>
2658 EOT;
2659
2660                 $ulink = '[url=' . $author_contact['url'] . ']' . $author_contact['name'] . '[/url]';
2661                 $alink = '[url=' . $item['author-link'] . ']' . $item['author-name'] . '[/url]';
2662                 $plink = '[url=' . System::baseUrl() . '/display/' . $owner_self_contact['nick'] . '/' . $item['id'] . ']' . $post_type . '[/url]';
2663
2664                 $new_item = [
2665                         'guid'          => get_guid(32),
2666                         'uri'           => self::newURI($item['uid']),
2667                         'uid'           => $item['uid'],
2668                         'contact-id'    => $item_contact_id,
2669                         'type'          => 'activity',
2670                         'wall'          => $item['wall'],
2671                         'origin'        => 1,
2672                         'gravity'       => GRAVITY_ACTIVITY,
2673                         'parent'        => $item['id'],
2674                         'parent-uri'    => $item['uri'],
2675                         'thr-parent'    => $item['uri'],
2676                         'owner-id'      => $item['owner-id'],
2677                         'owner-name'    => $item['owner-name'],
2678                         'owner-link'    => $item['owner-link'],
2679                         'owner-avatar'  => $item['owner-avatar'],
2680                         'author-id'     => $author_contact['id'],
2681                         'author-name'   => $author_contact['name'],
2682                         'author-link'   => $author_contact['url'],
2683                         'author-avatar' => $author_contact['thumb'],
2684                         'body'          => sprintf($bodyverb, $ulink, $alink, $plink),
2685                         'verb'          => $activity,
2686                         'object-type'   => $objtype,
2687                         'object'        => $obj,
2688                         'allow_cid'     => $item['allow_cid'],
2689                         'allow_gid'     => $item['allow_gid'],
2690                         'deny_cid'      => $item['deny_cid'],
2691                         'deny_gid'      => $item['deny_gid'],
2692                         'visible'       => 1,
2693                         'unseen'        => 1,
2694                 ];
2695
2696                 $new_item_id = self::insert($new_item);
2697
2698                 // If the parent item isn't visible then set it to visible
2699                 if (!$item['visible']) {
2700                         self::update(['visible' => true], ['id' => $item['id']]);
2701                 }
2702
2703                 // Save the author information for the like in case we need to relay to Diaspora
2704                 Diaspora::storeLikeSignature($item_contact, $new_item_id);
2705
2706                 $new_item['id'] = $new_item_id;
2707
2708                 Addon::callHooks('post_local_end', $new_item);
2709
2710                 Worker::add(PRIORITY_HIGH, "Notifier", "like", $new_item_id);
2711
2712                 return true;
2713         }
2714
2715         private static function addThread($itemid, $onlyshadow = false)
2716         {
2717                 $fields = ['uid', 'created', 'edited', 'commented', 'received', 'changed', 'wall', 'private', 'pubmail',
2718                         'moderated', 'visible', 'starred', 'bookmark', 'contact-id',
2719                         'deleted', 'origin', 'forum_mode', 'mention', 'network', 'author-id', 'owner-id'];
2720                 $condition = ["`id` = ? AND (`parent` = ? OR `parent` = 0)", $itemid, $itemid];
2721                 $item = dba::selectFirst('item', $fields, $condition);
2722
2723                 if (!DBM::is_result($item)) {
2724                         return;
2725                 }
2726
2727                 $item['iid'] = $itemid;
2728
2729                 if (!$onlyshadow) {
2730                         $result = dba::insert('thread', $item);
2731
2732                         logger("Add thread for item ".$itemid." - ".print_r($result, true), LOGGER_DEBUG);
2733                 }
2734         }
2735
2736         private static function updateThread($itemid, $setmention = false)
2737         {
2738                 $fields = ['uid', 'guid', 'created', 'edited', 'commented', 'received', 'changed',
2739                         'wall', 'private', 'pubmail', 'moderated', 'visible', 'starred', 'bookmark', 'contact-id',
2740                         'deleted', 'origin', 'forum_mode', 'network', 'author-id', 'owner-id'];
2741                 $condition = ["`id` = ? AND (`parent` = ? OR `parent` = 0)", $itemid, $itemid];
2742
2743                 $item = dba::selectFirst('item', $fields, $condition);
2744                 if (!DBM::is_result($item)) {
2745                         return;
2746                 }
2747
2748                 if ($setmention) {
2749                         $item["mention"] = 1;
2750                 }
2751
2752                 $sql = "";
2753
2754                 $fields = [];
2755
2756                 foreach ($item as $field => $data) {
2757                         if (!in_array($field, ["guid"])) {
2758                                 $fields[$field] = $data;
2759                         }
2760                 }
2761
2762                 $result = dba::update('thread', $fields, ['iid' => $itemid]);
2763
2764                 logger("Update thread for item ".$itemid." - guid ".$item["guid"]." - ".(int)$result, LOGGER_DEBUG);
2765         }
2766
2767         private static function deleteThread($itemid, $itemuri = "")
2768         {
2769                 $item = dba::selectFirst('thread', ['uid'], ['iid' => $itemid]);
2770                 if (!DBM::is_result($item)) {
2771                         logger('No thread found for id '.$itemid, LOGGER_DEBUG);
2772                         return;
2773                 }
2774
2775                 // Using dba::delete at this time could delete the associated item entries
2776                 $result = dba::e("DELETE FROM `thread` WHERE `iid` = ?", $itemid);
2777
2778                 logger("deleteThread: Deleted thread for item ".$itemid." - ".print_r($result, true), LOGGER_DEBUG);
2779
2780                 if ($itemuri != "") {
2781                         $condition = ["`uri` = ? AND NOT `deleted` AND NOT (`uid` IN (?, 0))", $itemuri, $item["uid"]];
2782                         if (!self::exists($condition)) {
2783                                 dba::delete('item', ['uri' => $itemuri, 'uid' => 0]);
2784                                 logger("deleteThread: Deleted shadow for item ".$itemuri, LOGGER_DEBUG);
2785                         }
2786                 }
2787         }
2788 }